Fix comments

Signed-off-by: dusanb94 <dusan.borovcanin@mainflux.com>

.dockerignore

@@ -1,10 +1,6 @@
 .git
 .github
 build
-ui
 docker
-docs
-k8s
-load-test
 metrics
 scripts

.env

@@ -0,0 +1,275 @@
+# Docker: Environment variables in Compose
+
+## NginX
+MF_NGINX_HTTP_PORT=80
+MF_NGINX_SSL_PORT=443
+MF_NGINX_MQTT_PORT=1883
+MF_NGINX_MQTTS_PORT=8883
+
+## NATS
+MF_NATS_URL=nats://nats:4222
+
+## Redis
+MF_REDIS_TCP_PORT=6379
+
+## Grafana
+MF_GRAFANA_PORT=3000
+
+## Jaeger
+MF_JAEGER_PORT=6831
+MF_JAEGER_FRONTEND=16686
+MF_JAEGER_COLLECTOR=14268
+MF_JAEGER_CONFIGS=5778
+MF_JAEGER_URL=jaeger:6831
+
+## Core Services
+
+### AuthN
+MF_AUTHN_LOG_LEVEL=debug
+MF_AUTHN_HTTP_PORT=8189
+MF_AUTHN_GRPC_PORT=8181
+MF_AUTHN_GRPC_URL=authn:8181
+MF_AUTHN_GRPC_TIMEOUT=1s
+MF_AUTHN_DB_PORT=5432
+MF_AUTHN_DB_USER=mainflux
+MF_AUTHN_DB_PASS=mainflux
+MF_AUTHN_DB=authn
+MF_AUTHN_SECRET=secret
+
+### Users
+MF_USERS_LOG_LEVEL=debug
+MF_USERS_HTTP_PORT=8180
+MF_USERS_DB_PORT=5432
+MF_USERS_DB_USER=mainflux
+MF_USERS_DB_PASS=mainflux
+MF_USERS_DB=users
+MF_USERS_ADMIN_EMAIL=admin@example.com
+MF_USERS_ADMIN_PASSWORD=12345678
+
+### Email utility
+MF_EMAIL_DRIVER=smtp
+MF_EMAIL_HOST=smtp.mailtrap.io
+MF_EMAIL_PORT=2525
+MF_EMAIL_USERNAME=18bf7f70705139
+MF_EMAIL_PASSWORD=2b0d302e775b1e
+MF_EMAIL_FROM_ADDRESS=from@example.com
+MF_EMAIL_FROM_NAME=Example
+MF_EMAIL_TEMPLATE=email.tmpl
+
+### Token utility
+MF_TOKEN_RESET_ENDPOINT=/reset-request
+
+### Things
+MF_THINGS_LOG_LEVEL=debug
+MF_THINGS_HTTP_PORT=8182
+MF_THINGS_AUTH_HTTP_PORT=8989
+MF_THINGS_AUTH_GRPC_PORT=8183
+MF_THINGS_AUTH_GRPC_URL=things:8183
+MF_THINGS_AUTH_GRPC_TIMEOUT=1s
+MF_THINGS_DB_PORT=5432
+MF_THINGS_DB_USER=mainflux
+MF_THINGS_DB_PASS=mainflux
+MF_THINGS_DB=things
+MF_THINGS_ES_URL=localhost:6379
+MF_THINGS_ES_PASS=
+MF_THINGS_ES_DB=0
+
+### HTTP
+MF_HTTP_ADAPTER_PORT=8185
+
+### MQTT
+MF_MQTT_ADAPTER_LOG_LEVEL=debug
+MF_MQTT_ADAPTER_MQTT_PORT=1883
+MF_MQTT_BROKER_PORT=1883
+MF_MQTT_ADAPTER_WS_PORT=8080
+MF_MQTT_BROKER_WS_PORT=8080
+MF_MQTT_ADAPTER_ES_DB=0
+MF_MQTT_ADAPTER_ES_PASS=
+
+### VERMEMQ
+MF_DOCKER_VERNEMQ_ALLOW_ANONYMOUS=on
+MF_DOCKER_VERNEMQ_LOG__CONSOLE__LEVEL=error
+
+### CoAP
+MF_COAP_ADAPTER_LOG_LEVEL=debug
+MF_COAP_ADAPTER_PORT=5683
+
+## Addons Services
+### Bootstrap
+MF_BOOTSTRAP_LOG_LEVEL=debug
+MF_BOOTSTRAP_PORT=8202
+MF_BOOTSTRAP_DB_PORT=5432
+MF_BOOTSTRAP_DB_USER=mainflux
+MF_BOOTSTRAP_DB_PASS=mainflux
+MF_BOOTSTRAP_DB=bootstrap
+MF_BOOTSTRAP_DB_SSL_MODE=disable
+
+### Provision
+MF_PROVISION_CONFIG_FILE=/configs/config.toml
+MF_PROVISION_LOG_LEVEL=debug
+MF_PROVISION_HTTP_PORT=8190
+MF_PROVISION_ENV_CLIENTS_TLS=false
+MF_PROVISION_SERVER_CERT=
+MF_PROVISION_SERVER_KEY=
+MF_PROVISION_MQTT_URL=tcp://localhost
+MF_PROVISION_USERS_LOCATION=http://localhost:8180
+MF_PROVISION_THINGS_LOCATION=http://things:8182
+MF_PROVISION_USER=
+MF_PROVISION_PASS=
+MF_PROVISION_API_KEY=
+MF_PROVISION_CERTS_SVC_URL=http://certs:8204
+MF_PROVISION_X509_PROVISIONING=true
+MF_PROVISION_BS_SVC_URL=http://bootstrap:8202/things
+MF_PROVISION_BS_SVC_WHITELIST_URL=http://bootstrap:8202/things/state
+MF_PROVISION_BS_CONFIG_PROVISIONING=true
+MF_PROVISION_BS_AUTO_WHITELIST=true
+MF_PROVISION_BS_CONTENT=
+MF_PROVISION_CERTS_RSA_BITS=4096
+MF_PROVISION_CERTS_HOURS_VALID=2400h
+
+# Certs
+MF_CERTS_LOG_LEVEL=debug
+MF_CERTS_HTTP_PORT=8204
+MF_CERTS_DB_HOST=certs-db
+MF_CERTS_DB_PORT=5432
+MF_CERTS_DB_USER=mainflux
+MF_CERTS_DB_PASS=mainflux
+MF_CERTS_DB=certs
+MF_CERTS_DB_SSL_MODE=
+MF_CERTS_DB_SSL_CERT=
+MF_CERTS_DB_SSL_KEY=
+MF_CERTS_DB_SSL_ROOT_CERT=
+MF_CERTS_ENCRYPT_KEY=
+MF_CERTS_CLIENT_TLS=
+MF_CERTS_CA_CERTS=
+MF_CERTS_SERVER_CERT=
+MF_CERTS_SERVER_KEY=
+MF_SDK_BASE_URL=http://172.17.0.1
+MF_SDK_THINGS_PREFIX=
+MF_CERTS_SIGN_CA_PATH=/etc/ssl/certs/ca.crt
+MF_CERTS_SIGN_CA_KEY_PATH=/etc/ssl/certs/ca.key
+MF_CERTS_SIGN_HOURS_VALID=2048h
+MF_CERTS_SIGN_RSA_BITS=2048
+MF_CERTS_VAULT_HOST=
+MF_CERTS_VAULT_PKI_PATH=pki_int
+MF_CERTS_VAULT_ROLE=agent
+MF_CERTS_VAULT_TOKEN=s.nArgw6xn3uIOfA7nfKk8LFaW
+
+
+### LoRa
+MF_LORA_ADAPTER_LOG_LEVEL=debug
+MF_LORA_ADAPTER_MESSAGES_URL=tcp://lora.mqtt.mainflux.io:1883
+MF_LORA_ADAPTER_HTTP_PORT=8187
+MF_LORA_ADAPTER_ROUTE_MAP_URL=localhost:6379
+MF_LORA_ADAPTER_ROUTE_MAP_PASS=
+MF_LORA_ADAPTER_ROUTE_MAP_DB=0
+
+### OPC-UA
+MF_OPCUA_ADAPTER_HTTP_PORT=8188
+MF_OPCUA_ADAPTER_LOG_LEVEL=debug
+MF_OPCUA_ADAPTER_POLICY=
+MF_OPCUA_ADAPTER_MODE=
+MF_OPCUA_ADAPTER_CERT_FILE=
+MF_OPCUA_ADAPTER_KEY_FILE=
+MF_OPCUA_ADAPTER_ROUTE_MAP_URL=localhost:6379
+MF_OPCUA_ADAPTER_ROUTE_MAP_PASS=
+MF_OPCUA_ADAPTER_ROUTE_MAP_DB=0
+MF_OPCUA_ADAPTER_EVENT_CONSUMER=opcua
+
+### Cassandra Writer
+MF_CASSANDRA_WRITER_LOG_LEVEL=debug
+MF_CASSANDRA_WRITER_PORT=8902
+MF_CASSANDRA_WRITER_DB_PORT=9042
+MF_CASSANDRA_WRITER_DB_CLUSTER=mainflux-cassandra
+MF_CASSANDRA_WRITER_DB_KEYSPACE=mainflux
+MF_CASSANDRA_WRITER_CONTENT_TYPE=application/senml+json
+
+### Cassandra Reader
+MF_CASSANDRA_READER_LOG_LEVEL=debug
+MF_CASSANDRA_READER_PORT=8903
+MF_CASSANDRA_READER_DB_PORT=9042
+MF_CASSANDRA_READER_DB_CLUSTER=mainflux-cassandra
+MF_CASSANDRA_READER_DB_KEYSPACE=mainflux
+MF_CASSANDRA_READER_SERVER_CERT=
+MF_CASSANDRA_READER_SERVER_KEY=
+
+### InfluxDB Writer
+MF_INFLUX_WRITER_LOG_LEVEL=debug
+MF_INFLUX_WRITER_PORT=8900
+MF_INFLUX_WRITER_BATCH_SIZE=5000
+MF_INFLUX_WRITER_BATCH_TIMEOUT=5
+MF_INFLUX_WRITER_DB_PORT=8086
+MF_INFLUX_WRITER_DB_USER=mainflux
+MF_INFLUX_WRITER_DB_PASS=mainflux
+MF_INFLUX_WRITER_DB=mainflux
+MF_INFLUX_WRITER_GRAFANA_PORT=3001
+MF_INFLUX_WRITER_CONTENT_TYPE=application/senml+json
+
+### InfluxDB Reader
+MF_INFLUX_READER_LOG_LEVEL=debug
+MF_INFLUX_READER_PORT=8905
+MF_INFLUX_READER_DB_PORT=8086
+MF_INFLUX_READER_DB_USER=mainflux
+MF_INFLUX_READER_DB_PASS=mainflux
+MF_INFLUX_READER_DB=mainflux
+MF_INFLUX_READER_SERVER_CERT=
+MF_INFLUX_READER_SERVER_KEY=
+
+### MongoDB Writer
+MF_MONGO_WRITER_LOG_LEVEL=debug
+MF_MONGO_WRITER_PORT=8901
+MF_MONGO_WRITER_DB=mainflux
+MF_MONGO_WRITER_DB_PORT=27017
+MF_MONGO_WRITER_CONTENT_TYPE=application/senml+json
+
+### MongoDB Reader
+MF_MONGO_READER_LOG_LEVEL=debug
+MF_MONGO_READER_PORT=8904
+MF_MONGO_READER_DB=mainflux
+MF_MONGO_READER_DB_PORT=27017
+MF_MONGO_READER_SERVER_CERT=
+MF_MONGO_READER_SERVER_KEY=
+
+### Postgres Writer
+MF_POSTGRES_WRITER_LOG_LEVEL=debug
+MF_POSTGRES_WRITER_PORT=9104
+MF_POSTGRES_WRITER_DB_PORT=5432
+MF_POSTGRES_WRITER_DB_USER=mainflux
+MF_POSTGRES_WRITER_DB_PASS=mainflux
+MF_POSTGRES_WRITER_DB=mainflux
+MF_POSTGRES_WRITER_DB_SSL_MODE=disable
+MF_POSTGRES_WRITER_DB_SSL_CERT=""
+MF_POSTGRES_WRITER_DB_SSL_KEY=""
+MF_POSTGRES_WRITER_DB_SSL_ROOT_CERT=""
+MF_POSTGRES_WRITER_CONTENT_TYPE=application/senml+json
+
+### Postgres Reader
+MF_POSTGRES_READER_LOG_LEVEL=debug
+MF_POSTGRES_READER_PORT=9204
+MF_POSTGRES_READER_CLIENT_TLS=false
+MF_POSTGRES_READER_CA_CERTS=""
+MF_POSTGRES_READER_DB_PORT=5432
+MF_POSTGRES_READER_DB_USER=mainflux
+MF_POSTGRES_READER_DB_PASS=mainflux
+MF_POSTGRES_READER_DB=mainflux
+MF_POSTGRES_READER_DB_SSL_MODE=disable
+MF_POSTGRES_READER_DB_SSL_CERT=""
+MF_POSTGRES_READER_DB_SSL_KEY=""
+MF_POSTGRES_READER_DB_SSL_ROOT_CERT=""
+
+# Twins
+MF_TWINS_LOG_LEVEL=debug
+MF_TWINS_HTTP_PORT=9021
+MF_TWINS_SERVER_CERT=""
+MF_TWINS_SERVER_KEY=""
+MF_TWINS_DB=mainflux-twins
+MF_TWINS_DB_HOST=twins-db
+MF_TWINS_DB_PORT=27018
+MF_TWINS_SINGLE_USER_EMAIL=""
+MF_TWINS_SINGLE_USER_TOKEN=""
+MF_TWINS_CLIENT_TLS=""
+MF_TWINS_CA_CERTS=""
+MF_TWINS_CHANNEL_ID=
+MF_TWINS_CACHE_URL=es-redis:6379
+MF_TWINS_CACHE_PASS=
+MF_TWINS_CACHE_DB=0

.gitignore

@@ -1,3 +1,8 @@
+# Copyright (c) Mainflux
+# SPDX-License-Identifier: Apache-2.0
+
+# Set your private global .gitignore:
+# https://digitalfortress.tech/tricks/creating-a-global-gitignore/
+
 build
 
-site/

CHANGELOG.md

@@ -11,6 +11,301 @@ Otherwise, whole log in a similar format can be observed via:
 git log --pretty=oneline --abbrev-commit
 ```
 
+## 0.11.0 - 29. MAY 2020.
+### Features and Bugfixes
+- Add VerneMQ docker image build from source (#1178)
+- MF-994 - Add tracing middleware for twins and states repos (#1181)
+- MF-995 - Add Twins tests for endpoint list twins and list states (#1174)
+- NOISSUE - Update dependencies (#1176)
+- MF-1163 - Fix influxdb-reader to use nanoseconds precision (#1171)
+- Rename environment variable MF_MQTT_ADAPTER_PORT to MF_MQTT_ADAPTER_MQTT_PORT in docker environment (#1170)
+- Remove thing related code from twins service (#1169)
+- MF-997 - Add twins service swagger file (#1167)
+- MF-1079 - Add MQTT forwarder (#1164)
+- MF-1159 - add gateway metadata update in provision method (#1160)
+- MF-1055 - rollback/release transaction on error (#1166)
+- NOISSUE - Use log level error for VermeMQ docker (#1162)
+- NOISSUE - Fix default nats pubsub subject (#1153)
+- MF-1125 - Document Provision service (#1143)
+- NOISSUE - Fix bootstrap SDK args naming (#1151)
+- Use VerneMQ default log level (#1150)
+- NOISSUE - Update provision service (#1133)
+- NOISSUE - Refactor messaging (#1141)
+- Add JSON tags to SDK entities (#1146)
+- NOISSUE - Update CLI README.md (#1139)
+- NOISSUE - Update mProxy version (#1137)
+- fix nginx, channel connect (#1136)
+- Remove concurrency flag for golangci-lint (#1134)
+- MF-1088 - Remove message payload content type (#1121)
+- MF-1129 - Use snake_case for Lora and OPC-UA metadata fields (#1130)
+- MF-1128 - Add golangci-linter to a CI script (#1131)
+- MF-1123 - Move Provision service to monorepo (#1132)
+- MF-845 - Add FOSSA badge for licensing (#1127)
+- MF-1087 - Remove WebSocket adapter (#1120)
+- NOISSUE - Use HTTP Status in SDK error messages (#1119)
+- NOISSUE - Fix bootstrap token naming and interfaces named args (#1117)
+- MF-1115 - Improve the SDK error encoding (#1118)
+- MF-862 - Add boostrap CRUD to SDK and CLI (#1114)
+- NOISSUE - Update coding style in Things service (#1116)
+- NOISSUE - Remove defers from TestMain (#1111)
+- NOISSUE - Create func to encode SDK errors (#1110)
+- MF-1078 - Add timestamp to published messages and use it in Transformer (#1106)
+- Fix prometheus namespace in postgres reader & writer (#1109)
+- NOISSUE - Implement errors package in senml transformer, readers and writers (#1108)
+- NOISSUE - Implement errors package in Authentication service (#1105)
+- MF-1103 - API key should ignore empty expiration time (#1104)
+- MF-1096 - Fix AuthN and Things Auth ENVARS (#1066)
+- fix Contains function for nil arguments (#1102)
+- MF-1099 - Add email subdomain validator (#1101)
+- MF-1091 - Use channels. as broker prefix (#1098)
+- MF-1090 - Use named Interfaces args (#1097)
+- NOISSUE - Create broker package for NATS (#1080)
+- NOISSUE - Implement errors package in bootstrap service (#1093)
+- NOISSUE - Fix writers loadSubjectsConfig if file is missing (#1094)
+- NOISSUE - Adding subtopics filtering in writer services (#1072)
+- NOISSUE - Improve errors package (#1086)
+- NOISSUE - Enable MQTT over WS in docker composition (#1085)
+- NOISSUE - Rm unused opc-ua envars (#1083)
+- MF-798 - Add utf8 support for email validation (#1082)
+- Remove unused Tokenizer interface (#1084)
+- Update mqtt adapter imports (#1081)
+- NOISSUE - Update state based on SenML time value (#1075)
+- NOISSUE - Fix StatusBadDecodingError for opc-ua browse (#1074)
+- Save senml array msg to multiple states (#1073)
+- NOISSUE - Fix opc-ua message type handling (#1071)
+- NOISSUE - Add Publisher field to MQTT adapter (#1067)
+- NOISSUE - Fix users CLI (#1062)
+- NOISSUE - Fix SDK Messages response (#1064)
+- Merged MQTT docker compose in core composition file (#1060)
+- MF-1016 - Add UserUpdate and UpdatePassword to sdk and CLI (#1057)
+- Update mProxy (#1058)
+- MF-1053 - Add disconnect event to MQTT adapter (#1056)
+- Fix data type for data_value in databases (#1054)
+- NOISSUE - Fix opc-ua subscriptions store (#1052)
+- NOISSUE - Fix connect CLI command and remove ConnectThing func from SDK (#1051)
+- NOISSUE - Update Vernemq image repository (#1050)
+- Removed VerneMQ auth plugin, Aedes impl. Added mproxy support in docker (#1049)
+- NOISSUE - Add default subscription nodeID and Interval ENVAR (#1046)
+- MF-415 - Merge mProxy support  (#1045)
+- NOISSUE - Remove twins-service mqtt dependency and publish notifs to nats (#1042)
+- Add arbitrary SenML value type saving to twin state (#1039)
+- Fixed Aedes dependencies (#1036)
+- MF-998 - Add Twins service to Makefile and docker-compose.yml (#1035)
+- MF-1032 - Fix redis docker volume of opcua-adapter (#1033)
+- NOISSUE - add nats conf (#1031)
+- MF-442 - Add SSL encryption to the MongoDB, InfluxDB and Cassanda readers (#1024)
+- NOISSUE - Add opc-ua type handling and unsubscription (#1029)
+- NOISSUE - Add aggregate attribute-based search for twin retrieval (#1027)
+- NOISSUE - Fix metadata in add Things endpoint (#1028)
+- NOISSUE - Fix minimal password length (#1023)
+- MF-1020 - Change default password for CLI provision test (#1021)
+- NOISSUE - Add subtopic to opcua messages (#1022)
+- NOISSUE - Add details to browsed OPC-UA nodes (#1019)
+- NOISSUE Fix obsolete attribute persistance (#1018)
+- Fix twins update revision counter (#1011)
+- Fixed docs instructions in README (#1010)
+- Fix copyright year (#1009)
+- Fix issuing recovery key (#1007)
+- Removed gatling load-test (#1005)
+- Removed old k8s manifests (#1004)
+- NOISSUE - Remove UI from docker-compose (#1001)
+- NOISSUE - Store successfull OPC-UA subscriptions (#999)
+- MF-730 - Add digital twin service for things (#855)
+- Fix Redis event naming (#996)
+- NOISSUE - Add a Browse endpoint in opcua-adapter (#988)
+- NOISSUE - Add Redis ES Username/Pass for VerneMQ (#991)
+- MF-982 - Add error when connecting empty channels or things (#985)
+
+## 0.10.0 - 17. DEC 2019.
+### Features
+- MF-932 - User API keys (#941)
+- NOISSUE - Use opcua server timestamp in opcua-adapter messages (#980)
+- Simplify CI script (#979)
+- NOISSUE - Add opcua-adapter conn route-map, use ServerURI and NodeID (#975)
+- Move docs to a separate repo (#976)
+- NOISSUE - Support multiple types values in opcua-adapter (#973)
+- Migrate from dep to go modules (#971)
+- NOISSUE - Add Node IdentifierType config in opcua-adapter (#967)
+- NOISSUE - Remove messages limit in influxdb-reader (#968)
+- MF-898 - Add bulk connect to CLI and SDK (#956)
+- MF-538 - Improve logging and API errors (#866)
+- NOISSUE - Remove Elm UI (#953)
+- MF-898 - Add bulk connections endpoint (#948)
+- MF-898 - Change thing's service to use bulk connect (#946)
+- MF-898 - Add transactions to postgres connect (#940)
+- Add missing user service tests (#945)
+- Remove Normalizer service from compose (#937)
+- MF-919 - Mainflux message updates (#924)
+- NOISSUE - Remove ARM multi-arch images (#929)
+- MF-906 - Change single creation endpoints to use bulk service calls (#927)
+- MF-922 - Add UpdateUser endpoint (#923)
+- MF-780 - Use Normalizer as a lib (#915)
+- NOISSUE - Switch to grpcbox for VerneMQ (#914)
+- Change channels to chs (#918)
+- MF-484 - Add bulk provisioning for things and channels (#889)
+- MF-899 - Update README and official docs (#910)
+- NOISSUE - Fix Redis envars (#903)
+- Add disconnect on gen_server terminate() (#913)
+- MF-890 - Add OPC-UA docs  (#904)
+- NOISSUE - Update Protobuf version (#902)
+- MF-886 - Add OPC-UA adapter (#878)
+- MF-532 - Password reset (#873)
+- MF-785 - Change CanAccess to CanAccessByKey (#894)
+- NOISSUE - Add MQTT UserName check on register and InstanceId in Redis (#884)
+- Add MQTT troubleshooting section (#882)
+- MF-875 - Add tracing to official documentation (#877)
+- MF-788 - Remove date and minimize copyright comments (#876)
+- MF-787 - Add tags to user, thing, and channel spans (#869)
+- Update docker-compose version for addons (#874)
+- MF-859 - Channels metadata search (#867)
+- MF-858 Users metadata (#861)
+- NOISSUE - Simplify MQTT benchmarking tool (#852)
+- NOISSUE - Upgrade Go version to 1.13 in container images (#868)
+- MF-820 - Fetch messages for a particular device (#843)
+- Update gorilla websocket version (#865)
+- NOISSUE - Update aedes version and fix Dockerfile (#863)
+- NOISSUE - Search by metadata (#849)
+- MF-846 - Install python in docker build for aedes mqtt image (#860)
+- NOISSUE - Clean NginX files, move .gitignores to dirs (#853)
+- NOISSUE - Add docker-compose for MQTT cluster (#841)
+- Add debug logs to the WS adapter (#848)
+- NOISSUE - Add measuring time from pub to sub (#839)
+- NOISSUE - update mqtt prov tool and some refactor (#831)
+- NOISSUE - Use Thing ID to update certs data (#827)
+- NOISSUE - Improve VerneMQ plugin code, add configurable gRPC pool size (#836)
+- NOISSUE - Use gRPC for VerneMQ (#835)
+- Switch secure of WS connection according to secure of http connection of UI (#829)
+- NOISSUE - Use current hostname instead of localhost for a WebSocket connection in the UI (#826)
+- NOISSUE - Improve MQTT benchmarking tools (#828)
+- NOISSUE - update mqtt benchmark (#824)
+- Add encryption key to env vars table (#823)
+- NOISSUE - Add version endpoint to MQTT adapter (#816)
+- MF-295 add mqtt benchmark tool (#817)
+- update mqtts commands (#815)
+- NOISSUE - Support encrypted bootstrap (#796)
+- Add config to writers docs (#812)
+- NOISSUE - Add VerneMQ support (#809)
+- NOISSUE - Add content type as part of MQTT subscription topic (#810)
+
+### Bugfixes
+- Fix MQTT protobuf filename(#981)  
+- MF-950 - Runtime error in normalizer - CBOR SenML (#974)
+- NOISSUE - Fix opcua-adapter events warnings (#965)
+- NOISSUE - Fix opcua-adapter events decode (#951)
+- Fix subtopic handling in VerneMQ (#962)
+- NOISSUE - Fix Update User (#959)
+- NOISSUE - Fix make dockers (#957)
+- Add dev_ back to make dockers_dev (#955)
+- NOISSUE - Fix docs (#952)
+- MF-916 - Fix Things and Channels counters (#947)
+- MF-942 - Fix email template logic  (#944)
+- NOISSUE - Fix HTTP header for Things and Channels creation (#939)
+- NOISSUE - Fix docker ui image name (#938)
+- NOISSUE - Fix lora-adapter (#936)
+- NOISSUE - Fix lora creation events (#933)
+- Fix doc for ENV vars in README (#920)
+- Fix compilation (#911)
+- Revert "NOISSUE - Make event sourcing optional (#907)" (#909)
+- NOISSUE - Make event sourcing optional (#907)
+- NOISSUE - Fix InfluxDB env vars (#908)
+- Fix Elm version for ARM Docker images (#905)
+- Fix Elm version in Dockerfile (#901)
+- NOISSUE - fix security doc (#897)
+- NOISSUE - Fix typo in docs and README (#891)
+- Fix Nginx mTLS configuration (#885)
+- Fix provision tool connect error handling (#879)
+- Fix: Correct 404 and Content-Type Issues in MQTT Version Endpoint (#837)
+- NOISSUE - Fix proto files in VerneMQ (#834)
+- NOISSUE - Fix hackney HTTP request (#833)
+- Add socket pool and fix pattern matching (#830)
+- Fix typo (#814)
+
+## 0.9.0 - 19. JUL 2019.
+### Features
+- Create and push docker manifest for new release from Makefile (#794)
+- MF-399 - Add open tracing support (#782)
+- MF-783 - Allow access checking by a thing ID (#784)
+- NOISSUE - Add authorization HTTP API to things service (#772)
+- Remove cli executable from repo (#776)
+- NOISSUE - Use .env vars in docker-compose (#770)
+- MF-663 - enable nginx port conf from docker env (#769)
+- Update docs (#766)
+- NOISSUE - Remove installing non-existent package in ci (#758)
+-  NOISSUE - Add searchable Channels name  (#754)
+- MF-466 - ARM docker deployment (#756)
+- Add missing Websocket.js into docker ui image (#755)
+- NOISSUE - Add searchable Things name (#750)
+- NOISSUE - Add certificate fields to the Bootstrap service (#752)
+- Update grpc and protobuf deps in mqtt adapter (#751)
+- MF-742 - Things to support single user scenario (#749)
+- MF-732 - Add Postgres reader (#740)
+- MF-722 - Change UUID lib (#746)
+- Add performance improvement to writer filtering (#744)
+- NOISSUE - Update nginx version (#748)
+- MF-574 - Add missing environment variables to Cassandra writer (#745)
+- NOISSUE - Add compile test to CI (#743)
+- MF-708 - Assign Writer(s) to a channel (#737)
+- MF-732 - Add PostgreSQL writer (#733)
+- NOISSUE - Add readers pagination in SDK (#736)
+- Add UI websocket open/close and send/receive (#728)
+- MF-707 - Allow custom Thing key (#726)
+- MF-525 - Add pagination response to the readers (#729)
+- NOISSUE - Rm Things type from lora-adapter (#727)
+- skip deleting of persistent volumes by default (#723)
+- MF-488 - Remove Thing type (app or device) (#718)
+- Remove empty channels check (#720)
+- MF-655 Proper usage of docker volumes (#657)
+- NOISSUE - Improve UI styling (#719)
+- MF-715 - Conflict on updating connection with a valid list of channels (#716)
+- MF-711 - Create separate Redis instance for ES (#717)
+- NOISSUE - Update event fields naming (#713)
+- MF-698 - Add missing info and docs about sys event sourcing (#712)
+- MF-549 - Change metadata format from JSON string to JSON object (#706)
+- NOISSUE - Replace repeating code by card gen func (#697)
+- Update Bootstrap service docker-compose.yml (#700)
+- Remove Debug function (#699)
+- MF-687 - Add event sourcing to Bootstrap service (#695)
+- NOISSUE - Remove debugging message from response of handle error function (#696)
+- Add event stream to MQTT adapter for conn status (#692)
+- NOISSUE - Improve UI style (#691)
+- Update docs structure (#686)
+- Use images instead of carousel (#685)
+- NOISSUE - Update docs (#683)
+- MF-662 - Change menu style (#678)
+- MF-651 - X509 Mutual TLS authentication (#676)
+- Update Aedes version for MQTT adapter (#677)
+- MF-661 - Bootstrap pagination in UI (#672)
+- Update subtopics section in documentation (#670)
+- Remove default base URL value (#671)
+
+### Bugfixes
+- NOISSUE - Fix Readers logs (#735)
+- NOISSUE - Fix Docker for ARM (#760)
+- NOISSUE - Fix count when search by name is performed (#767)
+- NOISSUE - Typo fix (#777)
+- NOISSUE - Fix Postgres logs in Things service (#734)
+- Fix CI with fixed plugin versions (#747)
+- fix building problems (#741)
+- fix docker-compose env (#775)
+- Fix MF_THINGS_AUTH_GRPC_PORT in addons' docker-compose files (#781)
+- Fix MQTT raw message deserialization (#753)
+- fix variant option for manifest annotate (#765)
+- fix to makefile for OSX/Darwin (#724)
+- Fix .dockerignore file by removing index.html (#725)
+- Fix things and channels metadata create and edit & remove thing type (#721)
+- Fix Bootstrap service event map keys (#705)
+- Fix logging in publish event callback (#694)
+- Fix InfluxDB time bug (#689)
+- Fix users service to work in offline mode (#795)
+- fix mainflux_id parameter in bootstrap swagger (#789)
+- Fix offset calculation after deleting thing/channel, not to go to negative offset after deleting last thing/channel (#679)
+- Use errors and null packets in authorized pub/sub (#773)
+- NOISSUE - Fix CoAP adapter (#779)
+
+
+### Summary
+https://github.com/mainflux/mainflux/milestone/10?closed=1
+
 ## 0.8.0 - 20. MAR 2019.
 ### Features
 - MF-571 - Add Env.elm to set custom base URL (#654)

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-  name = "github.com/pmezard/go-difflib"
-  packages = ["difflib"]
-  pruneopts = "UT"
-  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
-  version = "v1.0.0"
-
-[[projects]]
-  digest = "1:26663fafdea73a38075b07e8e9d82fc0056379d2be8bb4e13899e8fda7c7dd23"
-  name = "github.com/prometheus/client_golang"
-  packages = [
-    "prometheus",
-    "prometheus/internal",
-    "prometheus/promhttp",
-  ]
-  pruneopts = "UT"
-  revision = "abad2d1bd44235a26707c172eab6bca5bf2dbad3"
-  version = "v0.9.1"
-
-[[projects]]
-  branch = "master"
-  digest = "1:32d10bdfa8f09ecf13598324dba86ab891f11db3c538b6a34d1c3b5b99d7c36b"
-  name = "github.com/prometheus/client_model"
-  packages = ["go"]
-  pruneopts = "UT"
-  revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
-
-[[projects]]
-  branch = "master"
-  digest = "1:e469cd65badf7694aeb44874518606d93c1d59e7735d3754ad442782437d3cc3"
-  name = "github.com/prometheus/common"
-  packages = [
-    "expfmt",
-    "internal/bitbucket.org/ww/goautoneg",
-    "model",
-  ]
-  pruneopts = "UT"
-  revision = "d811d2e9bf898806ecfb6ef6296774b13ffc314c"
-
-[[projects]]
-  branch = "master"
-  digest = "1:570784e0ddbf67f14087c6d8cfb7b999b9c55e75518a755e88cb202566ea8a17"
-  name = "github.com/prometheus/procfs"
-  packages = [
-    ".",
-    "internal/util",
-    "nfs",
-    "xfs",
-  ]
-  pruneopts = "UT"
-  revision = "8b1c2da0d56deffdbb9e48d4414b4e674bd8083e"
-
-[[projects]]
-  branch = "master"
-  digest = "1:89cf776c0a621a34017c819b66b9e0f0bb076d3c5b9ca74763fb89570e140038"
-  name = "github.com/rubenv/sql-migrate"
-  packages = [
-    ".",
-    "sqlparse",
-  ]
-  pruneopts = "UT"
-  revision = "ba2c6a7295c59448dbc195cef2f41df5163b3892"
-
-[[projects]]
-  digest = "1:274f67cb6fed9588ea2521ecdac05a6d62a8c51c074c1fccc6a49a40ba80e925"
-  name = "github.com/satori/go.uuid"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "f58768cc1a7a7e77a3bd49e98cdd21419399b6a3"
-  version = "v1.2.0"
-
-[[projects]]
-  digest = "1:9e9193aa51197513b3abcb108970d831fbcf40ef96aa845c4f03276e1fa316d2"
-  name = "github.com/sirupsen/logrus"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "c155da19408a8799da419ed3eeb0cb5db0ad5dbc"
-  version = "v1.0.5"
-
-[[projects]]
-  digest = "1:d3ffbc45dfe6929a4ba313464c2d761d96325d306eda29512da56c034db2a4dd"
-  name = "github.com/sony/gobreaker"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "b2a34562d02c4d5fd6645399c69e00141fb24e5a"
-  version = "0.4.0"
-
-[[projects]]
-  digest = "1:645cabccbb4fa8aab25a956cbcbdf6a6845ca736b2c64e197ca7cbb9d210b939"
-  name = "github.com/spf13/cobra"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "ef82de70bb3f60c65fb8eebacbb2d122ef517385"
-  version = "v0.0.3"
-
-[[projects]]
-  digest = "1:9424f440bba8f7508b69414634aef3b2b3a877e522d8a4624692412805407bb7"
-  name = "github.com/spf13/pflag"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "583c0c0531f06d5278b7d917446061adc344b5cd"
-  version = "v1.0.1"
-
-[[projects]]
-  digest = "1:c40d65817cdd41fac9aa7af8bed56927bb2d6d47e4fea566a74880f5c2b1c41e"
-  name = "github.com/stretchr/testify"
-  packages = [
-    "assert",
-    "require",
-  ]
-  pruneopts = "UT"
-  revision = "f35b8ab0b5a2cef36673838d662e249dd9c94686"
-  version = "v1.2.2"
-
-[[projects]]
-  digest = "1:03aa6e485e528acb119fb32901cf99582c380225fc7d5a02758e08b180cb56c3"
-  name = "github.com/ugorji/go"
-  packages = ["codec"]
-  pruneopts = "UT"
-  revision = "b4c50a2b199d93b13dc15e78929cfb23bfdf21ab"
-  version = "v1.1.1"
-
-[[projects]]
-  branch = "master"
-  digest = "1:40fdfd6ab85ca32b6935853bbba35935dcb1d796c8135efd85947566c76e662e"
-  name = "github.com/xdg/scram"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "7eeb5667e42c09cb51bf7b7c28aea8c56767da90"
-
-[[projects]]
-  branch = "master"
-  digest = "1:f5c1d04bc09c644c592b45b9f0bad4030521b1a7d11c7dadbb272d9439fa6e8e"
-  name = "github.com/xdg/stringprep"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "73f8eece6fdcd902c185bf651de50f3828bed5ed"
-
-[[projects]]
-  branch = "master"
-  digest = "1:7310f5459b88177d24e26c5ec7deb100b78ec03c0437d7a7aaec3c7eac333a55"
-  name = "golang.org/x/crypto"
-  packages = [
-    "bcrypt",
-    "blowfish",
-    "pbkdf2",
-    "ssh/terminal",
-  ]
-  pruneopts = "UT"
-  revision = "4d3f4d9ffa16a13f451c3b2999e9c49e9750bf06"
-
-[[projects]]
-  branch = "master"
-  digest = "1:70e155783b8dfd4f7697243384e2f361930ff0751459580769ce44d511f38b05"
-  name = "golang.org/x/net"
-  packages = [
-    "context",
-    "http/httpguts",
-    "http2",
-    "http2/hpack",
-    "idna",
-    "internal/socks",
-    "internal/timeseries",
-    "proxy",
-    "trace",
-    "websocket",
-  ]
-  pruneopts = "UT"
-  revision = "f73e4c9ed3b7ebdd5f699a16a880c2b1994e50dd"
-
-[[projects]]
-  branch = "master"
-  digest = "1:e0140c0c868c6e0f01c0380865194592c011fe521d6e12d78bfd33e756fe018a"
-  name = "golang.org/x/sync"
-  packages = ["semaphore"]
-  pruneopts = "UT"
-  revision = "1d60e4601c6fd243af51cc01ddf169918a5407ca"
-
-[[projects]]
-  branch = "master"
-  digest = "1:66e34aa65b83061616603ba83517a4523c7261e18afd01c769dd215614bf7d70"
-  name = "golang.org/x/sys"
-  packages = [
-    "unix",
-    "windows",
-  ]
-  pruneopts = "UT"
-  revision = "7dfd1290c7917b7ba22824b9d24954ab3002fe24"
-
-[[projects]]
-  digest = "1:a2ab62866c75542dd18d2b069fec854577a20211d7c0ea6ae746072a1dccdd18"
-  name = "golang.org/x/text"
-  packages = [
-    "collate",
-    "collate/build",
-    "internal/colltab",
-    "internal/gen",
-    "internal/tag",
-    "internal/triegen",
-    "internal/ucd",
-    "language",
-    "secure/bidirule",
-    "transform",
-    "unicode/bidi",
-    "unicode/cldr",
-    "unicode/norm",
-    "unicode/rangetable",
-  ]
-  pruneopts = "UT"
-  revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0"
-  version = "v0.3.0"
-
-[[projects]]
-  branch = "master"
-  digest = "1:cd018653a358d4b743a9d3bee89e825521f2ab2f2ec0770164bf7632d8d73ab7"
-  name = "google.golang.org/genproto"
-  packages = ["googleapis/rpc/status"]
-  pruneopts = "UT"
-  revision = "86e600f69ee4704c6efbf6a2a40a5c10700e76c2"
-
-[[projects]]
-  digest = "1:c3ad9841823db6da420a5625b367913b4ff54bbe60e8e3c98bd20e243e62e2d2"
-  name = "google.golang.org/grpc"
-  packages = [
-    ".",
-    "balancer",
-    "balancer/base",
-    "balancer/roundrobin",
-    "codes",
-    "connectivity",
-    "credentials",
-    "encoding",
-    "encoding/proto",
-    "grpclog",
-    "internal",
-    "internal/backoff",
-    "internal/channelz",
-    "internal/envconfig",
-    "internal/grpcrand",
-    "internal/transport",
-    "keepalive",
-    "metadata",
-    "naming",
-    "peer",
-    "resolver",
-    "resolver/dns",
-    "resolver/passthrough",
-    "stats",
-    "status",
-    "tap",
-  ]
-  pruneopts = "UT"
-  revision = "2e463a05d100327ca47ac218281906921038fd95"
-  version = "v1.16.0"
-
-[[projects]]
-  digest = "1:fa9a7c0ef59217bd22f32eb7cc027894d73f340a5633258cc079dec025db6a7f"
-  name = "gopkg.in/gorp.v1"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "c87af80f3cc5036b55b83d77171e156791085e2e"
-  version = "v1.7.1"
-
-[[projects]]
-  digest = "1:2d1fbdc6777e5408cabeb02bf336305e724b925ff4546ded0fa8715a7267922a"
-  name = "gopkg.in/inf.v0"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "d2d2541c53f18d2a059457998ce2876cc8e67cbf"
-  version = "v0.9.1"
-
-[[projects]]
-  digest = "1:de4bc452b049bde272d99e944aabcf218dc22df0a478a42a7107932f82430ae2"
-  name = "gopkg.in/ory-am/dockertest.v3"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "9f1141b78507d23603f6be530587664ebb63a8d2"
-  version = "v3.3.2"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  input-imports = [
-    "github.com/asaskevich/govalidator",
-    "github.com/cisco/senml",
-    "github.com/dereulenspiegel/coap-mux",
-    "github.com/dgrijalva/jwt-go",
-    "github.com/docker/docker/pkg/namesgenerator",
-    "github.com/dustin/go-coap",
-    "github.com/eclipse/paho.mqtt.golang",
-    "github.com/fatih/color",
-    "github.com/go-kit/kit/endpoint",
-    "github.com/go-kit/kit/log",
-    "github.com/go-kit/kit/metrics",
-    "github.com/go-kit/kit/metrics/prometheus",
-    "github.com/go-kit/kit/transport/grpc",
-    "github.com/go-kit/kit/transport/http",
-    "github.com/go-redis/redis",
-    "github.com/go-zoo/bone",
-    "github.com/gocql/gocql",
-    "github.com/gogo/protobuf/proto",
-    "github.com/golang/protobuf/proto",
-    "github.com/gorilla/websocket",
-    "github.com/hokaccha/go-prettyjson",
-    "github.com/influxdata/influxdb/client/v2",
-    "github.com/lib/pq",
-    "github.com/mongodb/mongo-go-driver/mongo",
-    "github.com/nats-io/go-nats",
-    "github.com/prometheus/client_golang/prometheus",
-    "github.com/prometheus/client_golang/prometheus/promhttp",
-    "github.com/rubenv/sql-migrate",
-    "github.com/satori/go.uuid",
-    "github.com/sony/gobreaker",
-    "github.com/spf13/cobra",
-    "github.com/stretchr/testify/assert",
-    "github.com/stretchr/testify/require",
-    "golang.org/x/crypto/bcrypt",
-    "golang.org/x/net/context",
-    "google.golang.org/grpc",
-    "google.golang.org/grpc/codes",
-    "google.golang.org/grpc/credentials",
-    "google.golang.org/grpc/status",
-    "gopkg.in/ory-am/dockertest.v3",
-  ]
-  solver-name = "gps-cdcl"
-  solver-version = 1

Gopkg.toml

@@ -1,115 +0,0 @@
-[[constraint]]
-  name = "github.com/asaskevich/govalidator"
-  version = "9.0.0"
-
-[[constraint]]
-  name = "github.com/cisco/senml"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/dgrijalva/jwt-go"
-  version = "3.2.0"
-
-[[constraint]]
-  name = "github.com/eclipse/paho.mqtt.golang"
-  version = "1.1.1"
-
-[[constraint]]
-  name = "github.com/fatih/color"
-  version = "1.7.0"
-
-[[constraint]]
-  name = "github.com/go-kit/kit"
-  version = "0.7.0"
-
-[[constraint]]
-  name = "github.com/go-zoo/bone"
-  version = "1.2.0"
-
-[[constraint]]
-  name = "github.com/golang/protobuf"
-  version = "1.2.0"
-
-[[constraint]]
-  name = "github.com/hokaccha/go-prettyjson"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/lib/pq"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/nats-io/go-nats"
-  version = "1.6.0"
-
-[[constraint]]
-  name = "github.com/prometheus/client_golang"
-  version = "0.9.1"
-
-[[constraint]]
-  name = "github.com/satori/go.uuid"
-  version = "1.2.0"
-
-[[constraint]]
-  name = "github.com/sony/gobreaker"
-  version = "0.4.0"
-
-[[constraint]]
-  name = "github.com/spf13/cobra"
-  version = "0.0.3"
-
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "1.2.2"
-
-[[constraint]]
-  name = "golang.org/x/crypto"
-  branch = "master"
-
-[[constraint]]
-  name = "gopkg.in/ory-am/dockertest.v3"
-  version = "3.3.2"
-
-[[constraint]]
-  name = "github.com/gorilla/websocket"
-  version = "1.4.0"
-
-[[constraint]]
-  name = "github.com/rubenv/sql-migrate"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/influxdata/influxdb"
-  version = "1.6.4"
-
-[[constraint]]
-  name = "github.com/mongodb/mongo-go-driver"
-  version = "0.0.5"
-
-[[constraint]]
-  name = "github.com/gocql/gocql"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/dereulenspiegel/coap-mux"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/dustin/go-coap"
-  branch = "master"
-
-[[constraint]]
-  name = "github.com/gogo/protobuf"
-  version = "1.1.1"
-
-[[constraint]]
-  name = "google.golang.org/grpc"
-  version = "1.16.0"
-
-[[constraint]]
-  name = "github.com/go-redis/redis"
-  version = "v6.15.0"
-
-[prune]
-  go-tests = true
-  unused-packages = true

LICENSE

@@ -176,7 +176,7 @@
 
    END OF TERMS AND CONDITIONS
 
-   Copyright 2015-2019 Mainflux
+   Copyright 2015-2020 Mainflux
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

Makefile

@@ -1,93 +1,84 @@
-## Copyright (c) 2015-2019
-## Mainflux
-##
-## SPDX-License-Identifier: Apache-2.0
+# Copyright (c) Mainflux
+# SPDX-License-Identifier: Apache-2.0
 
+MF_DOCKER_IMAGE_NAME_PREFIX ?= mainflux
 BUILD_DIR = build
-SERVICES = users things http normalizer ws coap lora influxdb-writer influxdb-reader mongodb-writer mongodb-reader cassandra-writer cassandra-reader cli bootstrap
+SERVICES = users things http coap lora influxdb-writer influxdb-reader mongodb-writer \
+	mongodb-reader cassandra-writer cassandra-reader postgres-writer postgres-reader cli \
+	bootstrap opcua authn twins mqtt provision certs
 DOCKERS = $(addprefix docker_,$(SERVICES))
 DOCKERS_DEV = $(addprefix docker_dev_,$(SERVICES))
 CGO_ENABLED ?= 0
-GOOS ?= linux
+GOARCH ?= amd64
 
 define compile_service
-	CGO_ENABLED=$(CGO_ENABLED) GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) go build -ldflags "-s -w" -o ${BUILD_DIR}/mainflux-$(1) cmd/$(1)/main.go
+	CGO_ENABLED=$(CGO_ENABLED) GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) go build -mod=vendor -ldflags "-s -w" -o ${BUILD_DIR}/mainflux-$(1) cmd/$(1)/main.go
 endef
 
 define make_docker
-	docker build --no-cache --build-arg SVC_NAME=$(subst docker_,,$(1)) --tag=mainflux/$(subst docker_,,$(1)) -f docker/Dockerfile .
+	$(eval svc=$(subst docker_,,$(1)))
+
+	docker build \
+		--no-cache \
+		--build-arg SVC=$(svc) \
+		--build-arg GOARCH=$(GOARCH) \
+		--build-arg GOARM=$(GOARM) \
+		--tag=$(MF_DOCKER_IMAGE_NAME_PREFIX)/$(svc) \
+		-f docker/Dockerfile .
 endef
 
 define make_docker_dev
-	docker build --build-arg SVC_NAME=$(subst docker_dev_,,$(1)) --tag=mainflux/$(subst docker_dev_,,$(1)) -f docker/Dockerfile.dev ./build
+	$(eval svc=$(subst docker_dev_,,$(1)))
+
+	docker build \
+		--no-cache \
+		--build-arg SVC=$(svc) \
+		--tag=$(MF_DOCKER_IMAGE_NAME_PREFIX)/$(svc) \
+		-f docker/Dockerfile.dev ./build
 endef
 
-all: $(SERVICES) mqtt
+all: $(SERVICES)
 
-.PHONY: all $(SERVICES) dockers dockers_dev latest release mqtt ui
+.PHONY: all $(SERVICES) dockers dockers_dev latest release
 
 clean:
 	rm -rf ${BUILD_DIR}
-	rm -rf mqtt/node_modules
 
-cleandocker: cleanghost
-	# Stop all containers (if running)
-	docker-compose -f docker/docker-compose.yml stop
-	# Remove mainflux containers
-	docker ps -f name=mainflux -aq | xargs -r docker rm
-	# Remove old mainflux images
-	docker images -q mainflux\/* | xargs -r docker rmi
+cleandocker:
+	# Stops containers and removes containers, networks, volumes, and images created by up
+	docker-compose -f docker/docker-compose.yml down --rmi all -v --remove-orphans
 
-# Clean ghost docker images
-cleanghost:
-	# Remove exited containers
-	docker ps -f status=dead -f status=exited -aq | xargs -r docker rm -v
-	# Remove unused images
-	docker images -f dangling=true -q | xargs -r docker rmi
+ifdef pv
 	# Remove unused volumes
-	docker volume ls -f dangling=true -q | xargs -r docker volume rm
+	docker volume ls -f name=$(MF_DOCKER_IMAGE_NAME_PREFIX) -f dangling=true -q | xargs -r docker volume rm
+endif
 
 install:
 	cp ${BUILD_DIR}/* $(GOBIN)
 
 test:
-	go test -v -race -count 1 -tags test $(shell go list ./... | grep -v 'vendor\|cmd')
+	go test -mod=vendor -v -race -count 1 -tags test $(shell go list ./... | grep -v 'vendor\|cmd')
 
 proto:
 	protoc --gofast_out=plugins=grpc:. *.proto
+	protoc --gofast_out=plugins=grpc:. pkg/messaging/*.proto
 
 $(SERVICES):
 	$(call compile_service,$(@))
 
 $(DOCKERS):
-	$(call make_docker,$(@))
-
-docker_ui:
-	$(MAKE) -C ui docker
-
-docker_mqtt:
-	# MQTT Docker build must be done from root dir because it copies .proto files
-	docker build --tag=mainflux/mqtt -f mqtt/Dockerfile .
-
-dockers: $(DOCKERS) docker_ui docker_mqtt
+	$(call make_docker,$(@),$(GOARCH))
 
 $(DOCKERS_DEV):
 	$(call make_docker_dev,$(@))
 
+dockers: $(DOCKERS)
 dockers_dev: $(DOCKERS_DEV)
 
-ui:
-	$(MAKE) -C ui
-
-mqtt:
-	cd mqtt && npm install
-
 define docker_push
 	for svc in $(SERVICES); do \
-		docker push mainflux/$$svc:$(1); \
+		docker push $(MF_DOCKER_IMAGE_NAME_PREFIX)/$$svc:$(1); \
 	done
-	docker push mainflux/ui:$(1)
-	docker push mainflux/mqtt:$(1)
 endef
 
 changelog:
@@ -101,10 +92,8 @@ release:
 	git checkout $(version)
 	$(MAKE) dockers
 	for svc in $(SERVICES); do \
-		docker tag mainflux/$$svc mainflux/$$svc:$(version); \
+		docker tag $(MF_DOCKER_IMAGE_NAME_PREFIX)/$$svc $(MF_DOCKER_IMAGE_NAME_PREFIX)/$$svc:$(version); \
 	done
-	docker tag mainflux/ui mainflux/ui:$(version)
-	docker tag mainflux/mqtt mainflux/mqtt:$(version)
 	$(call docker_push,$(version))
 
 rundev:
@@ -113,10 +102,12 @@ rundev:
 run:
 	docker-compose -f docker/docker-compose.yml up
 
-runui:
-	$(MAKE) -C ui run
-
 runlora:
-	docker-compose -f docker/docker-compose.yml up -d
-	docker-compose -f docker/addons/influxdb-writer/docker-compose.yml up -d
-	docker-compose -f docker/addons/lora-adapter/docker-compose.yml up
+	docker-compose \
+		-f docker/docker-compose.yml \
+		-f docker/addons/influxdb-writer/docker-compose.yml \
+		-f docker/addons/lora-adapter/docker-compose.yml up \
+
+# Run all Mainflux core services except distributed tracing system - Jaeger. Recommended on gateways:
+rungw:
+	MF_JAEGER_URL= docker-compose -f docker/docker-compose.yml up --scale jaeger=0

README.md

@@ -8,24 +8,26 @@
 
 ![banner][banner]
 
-Mainflux is modern, scalable, secure open source and patent-free IoT cloud platform written in Go.
+Mainflux is modern, scalable, secure, open-source, and patent-free IoT cloud platform written in Go.
 
-It accepts user, device, and application connections over various network protocols (i.e. HTTP,
+It accepts user and thing connections over various network protocols (i.e. HTTP,
 MQTT, WebSocket, CoAP), thus making a seamless bridge between them. It is used as the IoT middleware
 for building complex IoT solutions.
 
 For more details, check out the [official documentation][docs].
 
 Mainflux is member of the [Linux Foundation][lf] and an active contributor
-to the [EdgeX Foundry][edgex] project. It has been made with :heart: by [Mainflux company][company],
+to the [EdgeX Foundry][edgex] project. It has been made with :heart: by [Mainflux Labs][company],
 which maintains the project and offers professional services around it.
 
 ## Features
-- Multi-protocol connectivity and protocol bridging (HTTP, MQTT, WebSocket and CoAP)
-- Device management and provisioning
+
+- Multi-protocol connectivity and bridging (HTTP, MQTT, WebSocket and CoAP)
+- Device management and provisioning (Zero Touch provisioning)
+- Mutual TLS Authentication (mTLS) using X.509 Certificates
 - Fine-grained access control
-- Storage support (Cassandra, InfluxDB and MongoDB)
-- Platform logging and instrumentation support
+- Message persistence (Cassandra, InfluxDB, MongoDB and PostgresSQL)
+- Platform logging and instrumentation support (Grafana, Prometheus and OpenTracing)
 - Event sourcing
 - Container-based deployment using [Docker][docker] and [Kubernetes][kubernetes]
 - [LoRaWAN][lora] network integration
@@ -34,78 +36,99 @@ which maintains the project and offers professional services around it.
 - Small memory footprint and fast execution
 - Domain-driven design architecture, high-quality code and test coverage
 
+## Prerequisites
+
+The following are needed to run Mainflux:
+
+- [Docker](https://docs.docker.com/install/) (version 18.09)
+- [Docker compose](https://docs.docker.com/compose/install/) (version 1.24.1)
+
+Developing Mainflux will also require:
+
+- [Go](https://golang.org/doc/install) (version 1.13.3)
+- [Protobuf](https://github.com/protocolbuffers/protobuf#protocol-compiler-installation) (version 3.6.1)
+
 ## Install
-Before proceeding, install the following prerequisites:
 
-- [Docker](https://docs.docker.com/install/)
-- [Docker compose](https://docs.docker.com/compose/install/)
-
-Once everything is installed, execute the following commands from project root:
+Once the prerequisites are installed, execute the following commands from the project's root:
 
 ```bash
-docker-compose -f docker/docker-compose.yml up -d
+docker-compose -f docker/docker-compose.yml up
 ```
 
-This will bring up all Mainflux dockers and inter-connect them in the composition.
+This will bring up the Mainflux docker services and interconnect them. This command can also be executed using the project's included Makefile:
+
+```bash
+make run
+```
 
 ## Usage
-Best way to quickstart using Mainflux is via CLI:
-```
+
+The quickest way to start using Mainflux is via the CLI. The latest version can be downloaded from the [official releases page][rel]. 
+
+It can also be built and used from the project's root directory:
+
+```bash
 make cli
 ./build/mainflux-cli version
 ```
 
-> Mainflux CLI can also be downloaded as a tarball from [offical release page][rel]
-
-If this works, head to [official documentation][docs] to understand Mainflux provisioning and messaging.
+Additional details on using the CLI can be found in the [CLI documentation](https://mainflux.readthedocs.io/en/latest/cli/).
 
 ## Documentation
-Official documentation is hosted at [Mainflux Read The Docs page][docs].
 
-Documentation is auto-generated from Markdown files in `./docs` directory.
-If you spot an error or need for corrections, please let us know - or even better: send us a PR.
+Official documentation is hosted at [Mainflux Read The Docs page][docs]. Documentation is auto-generated, checkout the instructions on [official docs repository](https://github.com/mainflux/docs):
+
+If you spot an error or a need for corrections, please let us know - or even better: send us a PR.
 
 Additional practical information, news and tutorials can be found on the [Mainflux blog][blog].
 
 ## Authors
+
 Main architect and BDFL of Mainflux project is [@drasko][drasko].
 
 Additionally, [@nmarcetic][nikola] and [@janko-isidorovic][janko] assured
 overall architecture and design, while [@manuio][manu] and [@darkodraskovic][darko]
-helped with crafting initial implementation and continiusly work on the project evolutions.
+helped with crafting initial implementation and continuously worked on the project evolutions.
 
 Besides them, Mainflux is constantly improved and actively
 developed by [@anovakovic01][alex], [@dusanb94][dusan], [@srados][sava],
-[@gsaleh][george], [@blokovi][iva], [@chombium][kole] and a large set of contributors.
+[@gsaleh][george], [@blokovi][iva], [@chombium][kole], [@mteodor][mirko] and a large set of contributors.
 
 Maintainers are listed in [MAINTAINERS](MAINTAINERS) file.
 
-Mainflux team would like to give special thanks to [@mijicd][dejan] for his monumental work
-on designing and implementing highly improved and optimized version of the platform,
-and [@malidukica][dusanm] for his effort on implementing initial user interface.
+The Mainflux team would like to give special thanks to [@mijicd][dejan] for his monumental work
+on designing and implementing a highly improved and optimized version of the platform,
+and [@malidukica][dusanm] for his effort on implementing the initial user interface.
 
 ## Contributing
-Thank you for your interest in Mainflux and wish to contribute!
 
-1. Take a look at our [open issues](https://github.com/mainflux/mainflux/issues).
+Thank you for your interest in Mainflux and the desire to contribute!
+
+1. Take a look at our [open issues](https://github.com/mainflux/mainflux/issues). The [good-first-issue](https://github.com/mainflux/mainflux/labels/good-first-issue) label is specifically for issues that are great for getting started.
 2. Checkout the [contribution guide](CONTRIBUTING.md) to learn more about our style and conventions.
 3. Make your changes compatible to our workflow.
 
 ### We're Hiring
+
 If you are interested in working professionally on Mainflux,
 please head to company's [careers page][careers] or shoot us an e-mail at <careers@mainflux.com>.
 
-Note that the best way to grab our attention is by sending PRs :sunglasses:.
+>The best way to grab our attention is by sending PRs :sunglasses:.
 
 ## Community
+
 - [Google group][forum]
 - [Gitter][gitter]
 - [Twitter][twitter]
 
 ## License
+
 [Apache-2.0](LICENSE)
 
-[banner]: https://github.com/mainflux/mainflux/blob/master/docs/img/gopherBanner.jpg
+[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fmainflux%2Fmainflux.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2Fmainflux%2Fmainflux?ref=badge_large)
+
+[banner]: https://github.com/mainflux/docs/blob/master/docs/img/gopherBanner.jpg
 [ci-badge]: https://semaphoreci.com/api/v1/mainflux/mainflux/branches/master/badge.svg
 [ci-url]: https://semaphoreci.com/mainflux/mainflux
 [docs]: http://mainflux.readthedocs.io
@@ -140,3 +163,4 @@ Note that the best way to grab our attention is by sending PRs :sunglasses:.
 [iva]: https://github.com/blokovi
 [kole]: https://github.com/chombium
 [dusanm]: https://github.com/malidukica
+[mirko]: https://github.com/mteodor

api.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package mainflux
 

authn.proto

@@ -0,0 +1,49 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+syntax = "proto3";
+
+package mainflux;
+
+import "google/protobuf/empty.proto";
+
+service ThingsService {
+    rpc CanAccessByKey(AccessByKeyReq) returns (ThingID) {}
+    rpc CanAccessByID(AccessByIDReq) returns (google.protobuf.Empty) {}
+    rpc Identify(Token) returns (ThingID) {}
+}
+
+service AuthNService {
+    rpc Issue(IssueReq) returns (Token) {}
+    rpc Identify(Token) returns (UserID) {}
+}
+
+message AccessByKeyReq {
+    string token  = 1;
+    string chanID = 2;
+}
+
+message ThingID {
+    string value = 1;
+}
+
+message AccessByIDReq {
+    string thingID = 1;
+    string chanID  = 2;
+}
+
+// If a token is not carrying any information itself, the type
+// field can be used to determine how to validate the token.
+// Also, different tokens can be encoded in different ways.
+message Token {
+    string value = 1;
+}
+
+message UserID {
+    string value = 1;
+}
+
+message IssueReq {
+    string issuer = 1;
+    uint32 type   = 2;
+}

authn/README.md

@@ -0,0 +1,106 @@
+# Authentication service
+
+Authentication service provides an API for managing authentication keys.
+
+There are *three types of authentication keys*:
+
+- user key - keys issued to the user upon login request
+- API key - keys issued upon the user request
+- recovery key - password recovery key
+
+User keys are issued when user logs in. Each user request (other than `registration` and `login`) contains user key that is used to authenticate the user. API keys are similar to the User keys. The main difference is that API keys have configurable expiration time. If no time is set, the key will never expire. For that reason, API keys are _the only key type that can be revoked_. Recovery key is the password recovery key. It's short-lived token used for password recovery process.
+
+For in-depth explanation of the aforementioned scenarios, as well as thorough
+understanding of Mainflux, please check out the [official documentation][doc].
+
+The following actions are supported:
+
+- create (all key types)
+- verify (all key types)
+- obtain (API keys only; secret is never obtained)
+- revoke (API keys only)
+
+## Configuration
+
+The service is configured using the environment variables presented in the
+following table. Note that any unset variables will be replaced with their
+default values.
+
+| Variable                  | Description                                                              | Default       |
+|---------------------------|--------------------------------------------------------------------------|---------------|
+| MF_AUTHN_LOG_LEVEL        | Service level (debug, info, warn, error)                                | error          |
+| MF_AUTHN_DB_HOST          | Database host address                                                   | localhost      |
+| MF_AUTHN_DB_PORT          | Database host port                                                      | 5432           |
+| MF_AUTHN_DB_USER          | Database user                                                           | mainflux       |
+| MF_AUTHN_DB_PASSWORD      | Database password                                                       | mainflux       |
+| MF_AUTHN_DB               | Name of the database used by the service                                | auth           |
+| MF_AUTHN_DB_SSL_MODE      | Database connection SSL mode (disable, require, verify-ca, verify-full) | disable        |
+| MF_AUTHN_DB_SSL_CERT      | Path to the PEM encoded certificate file                                |                |
+| MF_AUTHN_DB_SSL_KEY       | Path to the PEM encoded key file                                        |                |
+| MF_AUTHN_DB_SSL_ROOT_CERT | Path to the PEM encoded root certificate file                           |                |
+| MF_AUTHN_HTTP_PORT        | Authn service HTTP port                                                 | 8180           |
+| MF_AUTHN_GRPC_PORT        | Authn service gRPC port                                                 | 8181           |
+| MF_AUTHN_SERVER_CERT      | Path to server certificate in pem format                                |                |
+| MF_AUTHN_SERVER_KEY       | Path to server key in pem format                                        |                |
+| MF_AUTHN_SECRET           | String used for signing tokens                                          | auth           |
+| MF_JAEGER_URL             | Jaeger server URL                                                       | localhost:6831 |
+
+## Deployment
+
+The service itself is distributed as Docker container. The following snippet
+provides a compose file template that can be used to deploy the service container
+locally:
+
+```yaml
+version: "2"
+services:
+  authn:
+    image: mainflux/authn:[version]
+    container_name: [instance name]
+    ports:
+      - [host machine port]:[configured HTTP port]
+    environment:
+      MF_AUTHN_LOG_LEVEL: [Service log level]
+      MF_AUTHN_DB_HOST: [Database host address]
+      MF_AUTHN_DB_PORT: [Database host port]
+      MF_AUTHN_DB_USER: [Database user]
+      MF_AUTHN_DB_PASS: [Database password]
+      MF_AUTHN_DB: [Name of the database used by the service]
+      MF_AUTHN_DB_SSL_MODE: [SSL mode to connect to the database with]
+      MF_AUTHN_DB_SSL_CERT: [Path to the PEM encoded certificate file]
+      MF_AUTHN_DB_SSL_KEY: [Path to the PEM encoded key file]
+      MF_AUTHN_DB_SSL_ROOT_CERT: [Path to the PEM encoded root certificate file]
+      MF_AUTHN_HTTP_PORT: [Service HTTP port]
+      MF_AUTHN_GRPC_PORT: [Service gRPC port]
+      MF_AUTHN_SECRET: [String used for signing tokens]
+      MF_AUTHN_SERVER_CERT: [String path to server certificate in pem format]
+      MF_AUTHN_SERVER_KEY: [String path to server key in pem format]
+      MF_JAEGER_URL: [Jaeger server URL]
+```
+
+To start the service outside of the container, execute the following shell script:
+
+```bash
+# download the latest version of the service
+go get github.com/mainflux/mainflux
+
+cd $GOPATH/src/github.com/mainflux/mainflux
+
+# compile the service
+make authn
+
+# copy binary to bin
+make install
+
+# set the environment variables and run the service
+MF_AUTHN_LOG_LEVEL=[Service log level] MF_AUTHN_DB_HOST=[Database host address] MF_AUTHN_DB_PORT=[Database host port] MF_AUTHN_DB_USER=[Database user] MF_AUTHN_DB_PASS=[Database password] MF_AUTHN_DB=[Name of the database used by the service] MF_AUTHN_DB_SSL_MODE=[SSL mode to connect to the database with] MF_AUTHN_DB_SSL_CERT=[Path to the PEM encoded certificate file] MF_AUTHN_DB_SSL_KEY=[Path to the PEM encoded key file] MF_AUTHN_DB_SSL_ROOT_CERT=[Path to the PEM encoded root certificate file] MF_AUTHN_HTTP_PORT=[Service HTTP port] MF_AUTHN_GRPC_PORT=[Service gRPC port] MF_AUTHN_SECRET=[String used for signing tokens] MF_AUTHN_SERVER_CERT=[Path to server certificate] MF_AUTHN_SERVER_KEY=[Path to server key] MF_JAEGER_URL=[Jaeger server URL] $GOBIN/mainflux-authn
+```
+
+If `MF_EMAIL_TEMPLATE` doesn't point to any file service will function but password reset functionality will not work.
+
+## Usage
+
+For more information about service capabilities and its usage, please check out
+the [API documentation](swagger.yaml).
+
+[doc]: http://mainflux.readthedocs.io

authn/api/doc.go

@@ -0,0 +1,5 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package api contains implementation of AuthN service HTTP API.
+package api

authn/api/grpc/client.go

@@ -0,0 +1,93 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/endpoint"
+	kitot "github.com/go-kit/kit/tracing/opentracing"
+	kitgrpc "github.com/go-kit/kit/transport/grpc"
+	"github.com/mainflux/mainflux"
+	opentracing "github.com/opentracing/opentracing-go"
+	"google.golang.org/grpc"
+)
+
+var _ mainflux.AuthNServiceClient = (*grpcClient)(nil)
+
+type grpcClient struct {
+	issue    endpoint.Endpoint
+	identify endpoint.Endpoint
+	timeout  time.Duration
+}
+
+// NewClient returns new gRPC client instance.
+func NewClient(tracer opentracing.Tracer, conn *grpc.ClientConn, timeout time.Duration) mainflux.AuthNServiceClient {
+	return &grpcClient{
+		issue: kitot.TraceClient(tracer, "issue")(kitgrpc.NewClient(
+			conn,
+			"mainflux.AuthNService",
+			"Issue",
+			encodeIssueRequest,
+			decodeIssueResponse,
+			mainflux.UserID{},
+		).Endpoint()),
+		identify: kitot.TraceClient(tracer, "identify")(kitgrpc.NewClient(
+			conn,
+			"mainflux.AuthNService",
+			"Identify",
+			encodeIdentifyRequest,
+			decodeIdentifyResponse,
+			mainflux.UserID{},
+		).Endpoint()),
+		timeout: timeout,
+	}
+}
+
+func (client grpcClient) Issue(ctx context.Context, req *mainflux.IssueReq, _ ...grpc.CallOption) (*mainflux.Token, error) {
+	ctx, close := context.WithTimeout(ctx, client.timeout)
+	defer close()
+
+	res, err := client.issue(ctx, issueReq{issuer: req.GetIssuer(), keyType: req.Type})
+	if err != nil {
+		return nil, err
+	}
+
+	ir := res.(identityRes)
+	return &mainflux.Token{Value: ir.id}, ir.err
+}
+
+func encodeIssueRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
+	req := grpcReq.(issueReq)
+	return &mainflux.IssueReq{Issuer: req.issuer, Type: req.keyType}, nil
+}
+
+func decodeIssueResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
+	res := grpcRes.(*mainflux.UserID)
+	return identityRes{res.GetValue(), nil}, nil
+}
+
+func (client grpcClient) Identify(ctx context.Context, token *mainflux.Token, _ ...grpc.CallOption) (*mainflux.UserID, error) {
+	ctx, close := context.WithTimeout(ctx, client.timeout)
+	defer close()
+
+	res, err := client.identify(ctx, identityReq{token: token.GetValue()})
+	if err != nil {
+		return nil, err
+	}
+
+	ir := res.(identityRes)
+	return &mainflux.UserID{Value: ir.id}, ir.err
+}
+
+func encodeIdentifyRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
+	req := grpcReq.(identityReq)
+	return &mainflux.Token{Value: req.token}, nil
+}
+
+func decodeIdentifyResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
+	res := grpcRes.(*mainflux.UserID)
+	return identityRes{res.GetValue(), nil}, nil
+}

authn/api/grpc/doc.go

@@ -0,0 +1,5 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package grpc contains implementation of AuthN service gRPC API.
+package grpc

authn/api/grpc/endpoint.go

@@ -0,0 +1,50 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/endpoint"
+	"github.com/mainflux/mainflux/authn"
+)
+
+func issueEndpoint(svc authn.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(issueReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		now := time.Now().UTC()
+		key := authn.Key{
+			Type:     req.keyType,
+			IssuedAt: now,
+		}
+
+		k, err := svc.Issue(ctx, req.issuer, key)
+		if err != nil {
+			return identityRes{}, err
+		}
+
+		return identityRes{k.Secret, nil}, nil
+	}
+}
+
+func identifyEndpoint(svc authn.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(identityReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		id, err := svc.Identify(ctx, req.token)
+		if err != nil {
+			return identityRes{}, err
+		}
+
+		return identityRes{id, nil}, nil
+	}
+}

authn/api/grpc/endpoint_test.go

@@ -0,0 +1,167 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc_test
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/authn"
+	grpcapi "github.com/mainflux/mainflux/authn/api/grpc"
+	"github.com/mainflux/mainflux/authn/jwt"
+	"github.com/mainflux/mainflux/authn/mocks"
+	"github.com/mainflux/mainflux/pkg/uuid"
+	"github.com/opentracing/opentracing-go/mocktracer"
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	port   = 8081
+	secret = "secret"
+	email  = "test@example.com"
+)
+
+var svc authn.Service
+
+func newService() authn.Service {
+	repo := mocks.NewKeyRepository()
+	uuidProvider := uuid.NewMock()
+	t := jwt.New(secret)
+
+	return authn.New(repo, uuidProvider, t)
+}
+
+func startGRPCServer(svc authn.Service, port int) {
+	listener, _ := net.Listen("tcp", fmt.Sprintf(":%d", port))
+	server := grpc.NewServer()
+	mainflux.RegisterAuthNServiceServer(server, grpcapi.NewServer(mocktracer.New(), svc))
+	go server.Serve(listener)
+}
+
+func TestIssue(t *testing.T) {
+	userKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	authAddr := fmt.Sprintf("localhost:%d", port)
+	conn, _ := grpc.Dial(authAddr, grpc.WithInsecure())
+	client := grpcapi.NewClient(mocktracer.New(), conn, time.Second)
+
+	cases := []struct {
+		desc string
+		id   string
+		kind uint32
+		err  error
+		code codes.Code
+	}{
+		{
+			desc: "issue for user with valid token",
+			id:   email,
+			kind: authn.UserKey,
+			err:  nil,
+			code: codes.OK,
+		},
+		{
+			desc: "issue recovery key",
+			id:   email,
+			kind: authn.RecoveryKey,
+			err:  nil,
+			code: codes.OK,
+		},
+		{
+			desc: "issue API key",
+			id:   userKey.Secret,
+			kind: authn.APIKey,
+			err:  nil,
+			code: codes.OK,
+		},
+		{
+			desc: "issue for invalid key type",
+			id:   email,
+			kind: 32,
+			err:  status.Error(codes.InvalidArgument, "received invalid token request"),
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "issue for user that  exist",
+			id:   "",
+			kind: authn.APIKey,
+			err:  status.Error(codes.Unauthenticated, "unauthorized access"),
+			code: codes.Unauthenticated,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := client.Issue(context.Background(), &mainflux.IssueReq{Issuer: tc.id, Type: tc.kind})
+		e, ok := status.FromError(err)
+		assert.True(t, ok, "gRPC status can't be extracted from the error")
+		assert.Equal(t, tc.code, e.Code(), fmt.Sprintf("%s: expected %s got %s", tc.desc, tc.code, e.Code()))
+	}
+}
+
+func TestIdentify(t *testing.T) {
+	userKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	recoveryKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.RecoveryKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing recovery key expected to succeed: %s", err))
+
+	apiKey, err := svc.Issue(context.Background(), userKey.Secret, authn.Key{Type: authn.APIKey, IssuedAt: time.Now(), ExpiresAt: time.Now().Add(time.Minute)})
+	assert.Nil(t, err, fmt.Sprintf("Issuing API key expected to succeed: %s", err))
+
+	authAddr := fmt.Sprintf("localhost:%d", port)
+	conn, _ := grpc.Dial(authAddr, grpc.WithInsecure())
+	client := grpcapi.NewClient(mocktracer.New(), conn, time.Second)
+
+	cases := []struct {
+		desc  string
+		token string
+		id    string
+		err   error
+		code  codes.Code
+	}{
+		{
+			desc:  "identify user with recovery token",
+			token: recoveryKey.Secret,
+			id:    email,
+			err:   nil,
+			code:  codes.OK,
+		},
+		{
+			desc:  "identify user with API token",
+			token: apiKey.Secret,
+			id:    email,
+			err:   nil,
+			code:  codes.OK,
+		},
+		{
+			desc:  "identify user with invalid user token",
+			token: "invalid",
+			id:    "",
+			err:   status.Error(codes.Unauthenticated, "unauthorized access"),
+			code:  codes.Unauthenticated,
+		},
+		{
+			desc:  "identify user that doesn't exist",
+			token: "",
+			id:    "",
+			err:   status.Error(codes.InvalidArgument, "received invalid token request"),
+			code:  codes.InvalidArgument,
+		},
+	}
+
+	for _, tc := range cases {
+		id, err := client.Identify(context.Background(), &mainflux.Token{Value: tc.token})
+		assert.Equal(t, tc.id, id.GetValue(), fmt.Sprintf("%s: expected %s got %s", tc.desc, tc.id, id.GetValue()))
+		e, ok := status.FromError(err)
+		assert.True(t, ok, "gRPC status can't be extracted from the error")
+		assert.Equal(t, tc.code, e.Code(), fmt.Sprintf("%s: expected %s got %s", tc.desc, tc.code, e.Code()))
+	}
+}

authn/api/grpc/requests.go

@@ -0,0 +1,42 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc
+
+import "github.com/mainflux/mainflux/authn"
+
+type identityReq struct {
+	token string
+	kind  uint32
+}
+
+func (req identityReq) validate() error {
+	if req.token == "" {
+		return authn.ErrMalformedEntity
+	}
+	if req.kind != authn.UserKey &&
+		req.kind != authn.APIKey &&
+		req.kind != authn.RecoveryKey {
+		return authn.ErrMalformedEntity
+	}
+
+	return nil
+}
+
+type issueReq struct {
+	issuer  string
+	keyType uint32
+}
+
+func (req issueReq) validate() error {
+	if req.issuer == "" {
+		return authn.ErrUnauthorizedAccess
+	}
+	if req.keyType != authn.UserKey &&
+		req.keyType != authn.APIKey &&
+		req.keyType != authn.RecoveryKey {
+		return authn.ErrMalformedEntity
+	}
+
+	return nil
+}

authn/api/grpc/responses.go

@@ -0,0 +1,9 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc
+
+type identityRes struct {
+	id  string
+	err error
+}

authn/api/grpc/server.go

@@ -0,0 +1,91 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc
+
+import (
+	"context"
+
+	kitot "github.com/go-kit/kit/tracing/opentracing"
+	kitgrpc "github.com/go-kit/kit/transport/grpc"
+	mainflux "github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/pkg/errors"
+	opentracing "github.com/opentracing/opentracing-go"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+var _ mainflux.AuthNServiceServer = (*grpcServer)(nil)
+
+type grpcServer struct {
+	issue    kitgrpc.Handler
+	identify kitgrpc.Handler
+}
+
+// NewServer returns new AuthnServiceServer instance.
+func NewServer(tracer opentracing.Tracer, svc authn.Service) mainflux.AuthNServiceServer {
+	return &grpcServer{
+		issue: kitgrpc.NewServer(
+			kitot.TraceServer(tracer, "issue")(issueEndpoint(svc)),
+			decodeIssueRequest,
+			encodeIssueResponse,
+		),
+		identify: kitgrpc.NewServer(
+			kitot.TraceServer(tracer, "identify")(identifyEndpoint(svc)),
+			decodeIdentifyRequest,
+			encodeIdentifyResponse,
+		),
+	}
+}
+
+func (s *grpcServer) Issue(ctx context.Context, req *mainflux.IssueReq) (*mainflux.Token, error) {
+	_, res, err := s.issue.ServeGRPC(ctx, req)
+	if err != nil {
+		return nil, encodeError(err)
+	}
+	return res.(*mainflux.Token), nil
+}
+
+func (s *grpcServer) Identify(ctx context.Context, token *mainflux.Token) (*mainflux.UserID, error) {
+	_, res, err := s.identify.ServeGRPC(ctx, token)
+	if err != nil {
+		return nil, encodeError(err)
+	}
+	return res.(*mainflux.UserID), nil
+}
+
+func decodeIssueRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
+	req := grpcReq.(*mainflux.IssueReq)
+	return issueReq{issuer: req.GetIssuer(), keyType: req.GetType()}, nil
+}
+
+func encodeIssueResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
+	res := grpcRes.(identityRes)
+	return &mainflux.Token{Value: res.id}, encodeError(res.err)
+}
+
+func decodeIdentifyRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
+	req := grpcReq.(*mainflux.Token)
+	return identityReq{token: req.GetValue()}, nil
+}
+
+func encodeIdentifyResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
+	res := grpcRes.(identityRes)
+	return &mainflux.UserID{Value: res.id}, encodeError(res.err)
+}
+
+func encodeError(err error) error {
+	switch {
+	case errors.Contains(err, nil):
+		return nil
+	case errors.Contains(err, authn.ErrMalformedEntity):
+		return status.Error(codes.InvalidArgument, "received invalid token request")
+	case errors.Contains(err, authn.ErrUnauthorizedAccess):
+		return status.Error(codes.Unauthenticated, err.Error())
+	case errors.Contains(err, authn.ErrKeyExpired):
+		return status.Error(codes.Unauthenticated, err.Error())
+	default:
+		return status.Error(codes.Internal, "internal server error")
+	}
+}

authn/api/grpc/setup_test.go

@@ -0,0 +1,18 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package grpc_test
+
+import (
+	"os"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	svc = newService()
+	startGRPCServer(svc, port)
+
+	code := m.Run()
+
+	os.Exit(code)
+}

authn/api/http/endpoint.go

@@ -0,0 +1,83 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package http
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/endpoint"
+	"github.com/mainflux/mainflux/authn"
+)
+
+func issueEndpoint(svc authn.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(issueKeyReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		now := time.Now().UTC()
+		newKey := authn.Key{
+			Issuer:   req.issuer,
+			IssuedAt: now,
+			Type:     req.Type,
+		}
+
+		duration := time.Duration(req.Duration * time.Second)
+		if duration != 0 {
+			exp := now.Add(duration)
+			newKey.ExpiresAt = exp
+		}
+
+		key, err := svc.Issue(ctx, req.issuer, newKey)
+		if err != nil {
+			return nil, err
+		}
+
+		res := issueKeyRes{
+			ID:       key.ID,
+			Value:    key.Secret,
+			IssuedAt: key.IssuedAt,
+		}
+		if !key.ExpiresAt.IsZero() {
+			res.ExpiresAt = &key.ExpiresAt
+		}
+		return res, nil
+	}
+}
+
+func revokeEndpoint(svc authn.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(keyReq)
+
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		if err := svc.Revoke(ctx, req.issuer, req.id); err != nil {
+			return nil, err
+		}
+
+		return revokeKeyRes{}, nil
+	}
+}
+
+func retrieveEndpoint(svc authn.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(keyReq)
+
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		key, err := svc.Retrieve(ctx, req.issuer, req.id)
+
+		if err != nil {
+			return nil, err
+		}
+
+		return key, nil
+	}
+}

authn/api/http/endpoint_test.go

@@ -0,0 +1,289 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package http_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	authn "github.com/mainflux/mainflux/authn"
+	httpapi "github.com/mainflux/mainflux/authn/api/http"
+	"github.com/mainflux/mainflux/authn/jwt"
+	"github.com/mainflux/mainflux/authn/mocks"
+	"github.com/mainflux/mainflux/pkg/uuid"
+	"github.com/opentracing/opentracing-go/mocktracer"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	secret       = "secret"
+	contentType  = "application/json"
+	invalidEmail = "userexample.com"
+	wrongID      = "123e4567-e89b-12d3-a456-000000000042"
+	id           = "123e4567-e89b-12d3-a456-000000000001"
+	email        = "user@example.com"
+)
+
+type issueRequest struct {
+	Duration time.Duration `json:"duration,omitempty"`
+	Type     uint32        `json:"type,omitempty"`
+}
+
+type testRequest struct {
+	client      *http.Client
+	method      string
+	url         string
+	contentType string
+	token       string
+	body        io.Reader
+}
+
+func (tr testRequest) make() (*http.Response, error) {
+	req, err := http.NewRequest(tr.method, tr.url, tr.body)
+	if err != nil {
+		return nil, err
+	}
+	if tr.token != "" {
+		req.Header.Set("Authorization", tr.token)
+	}
+	if tr.contentType != "" {
+		req.Header.Set("Content-Type", tr.contentType)
+	}
+
+	req.Header.Set("Referer", "http://localhost")
+	return tr.client.Do(req)
+}
+
+func newService() authn.Service {
+	repo := mocks.NewKeyRepository()
+	uuidProvider := uuid.NewMock()
+	t := jwt.New(secret)
+	return authn.New(repo, uuidProvider, t)
+}
+
+func newServer(svc authn.Service) *httptest.Server {
+	mux := httpapi.MakeHandler(svc, mocktracer.New())
+	return httptest.NewServer(mux)
+}
+
+func toJSON(data interface{}) string {
+	jsonData, _ := json.Marshal(data)
+	return string(jsonData)
+}
+
+func TestIssue(t *testing.T) {
+	svc := newService()
+	userKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	ts := newServer(svc)
+	defer ts.Close()
+	client := ts.Client()
+
+	uk := issueRequest{Type: authn.UserKey}
+	ak := issueRequest{Type: authn.APIKey, Duration: time.Hour}
+	rk := issueRequest{Type: authn.RecoveryKey}
+
+	cases := []struct {
+		desc   string
+		req    string
+		ct     string
+		token  string
+		status int
+	}{
+		{
+			desc:   "issue user key",
+			req:    toJSON(uk),
+			ct:     contentType,
+			token:  "",
+			status: http.StatusCreated,
+		},
+		{
+			desc:   "issue API key",
+			req:    toJSON(ak),
+			ct:     contentType,
+			token:  userKey.Secret,
+			status: http.StatusCreated,
+		},
+		{
+			desc:   "issue recovery key",
+			req:    toJSON(rk),
+			ct:     contentType,
+			token:  userKey.Secret,
+			status: http.StatusBadRequest,
+		},
+		{
+			desc: "issue user key wrong content type",
+			req:  toJSON(uk),
+			ct:   "", token: userKey.Secret,
+			status: http.StatusUnsupportedMediaType,
+		},
+		{
+			desc:   "issue key wrong content type",
+			req:    toJSON(rk),
+			ct:     "",
+			token:  userKey.Secret,
+			status: http.StatusUnsupportedMediaType,
+		},
+		{
+			desc:   "issue key unauthorized",
+			req:    toJSON(ak),
+			ct:     contentType,
+			token:  "wrong",
+			status: http.StatusForbidden,
+		},
+		{
+			desc:   "issue recovery key with empty token",
+			req:    toJSON(rk),
+			ct:     contentType,
+			token:  "",
+			status: http.StatusBadRequest,
+		},
+		{
+			desc:   "issue key with invalid request",
+			req:    "{",
+			ct:     contentType,
+			token:  "",
+			status: http.StatusBadRequest,
+		},
+		{
+			desc:   "issue key with invalid JSON",
+			req:    "{invalid}",
+			ct:     contentType,
+			token:  "",
+			status: http.StatusBadRequest,
+		},
+		{
+			desc:   "issue key with invalid JSON content",
+			req:    `{"Type":{"key":"value"}}`,
+			ct:     contentType,
+			token:  "",
+			status: http.StatusBadRequest,
+		},
+	}
+
+	for _, tc := range cases {
+		req := testRequest{
+			client:      client,
+			method:      http.MethodPost,
+			url:         fmt.Sprintf("%s/keys", ts.URL),
+			contentType: tc.ct,
+			token:       tc.token,
+			body:        strings.NewReader(tc.req),
+		}
+		res, err := req.make()
+		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
+		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
+	}
+}
+
+func TestRetrieve(t *testing.T) {
+	svc := newService()
+	loginKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+	key := authn.Key{Type: authn.APIKey, IssuedAt: time.Now()}
+
+	k, err := svc.Issue(context.Background(), loginKey.Secret, key)
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+
+	ts := newServer(svc)
+	defer ts.Close()
+	client := ts.Client()
+
+	cases := []struct {
+		desc   string
+		id     string
+		token  string
+		status int
+	}{
+		{
+			desc:   "retrieve an existing key",
+			id:     k.ID,
+			token:  loginKey.Secret,
+			status: http.StatusOK,
+		},
+		{
+			desc:   "retrieve a non-existing key",
+			id:     "non-existing",
+			token:  loginKey.Secret,
+			status: http.StatusNotFound,
+		},
+		{
+			desc:   "retrieve a key unauthorized",
+			id:     k.ID,
+			token:  "wrong",
+			status: http.StatusForbidden,
+		},
+	}
+
+	for _, tc := range cases {
+		req := testRequest{
+			client: client,
+			method: http.MethodGet,
+			url:    fmt.Sprintf("%s/keys/%s", ts.URL, tc.id),
+			token:  tc.token,
+		}
+		res, err := req.make()
+		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
+		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
+	}
+}
+
+func TestRevoke(t *testing.T) {
+	svc := newService()
+	userKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+	key := authn.Key{Type: authn.APIKey, IssuedAt: time.Now()}
+
+	k, err := svc.Issue(context.Background(), userKey.Secret, key)
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	ts := newServer(svc)
+	defer ts.Close()
+	client := ts.Client()
+
+	cases := []struct {
+		desc   string
+		id     string
+		token  string
+		status int
+	}{
+		{
+			desc:   "revoke an existing key",
+			id:     k.ID,
+			token:  userKey.Secret,
+			status: http.StatusNoContent,
+		},
+		{
+			desc:   "revoke a non-existing key",
+			id:     "non-existing",
+			token:  userKey.Secret,
+			status: http.StatusNoContent,
+		},
+		{
+			desc:   "revoke a key unauthorized",
+			id:     k.ID,
+			token:  "wrong",
+			status: http.StatusForbidden},
+	}
+
+	for _, tc := range cases {
+		req := testRequest{
+			client: client,
+			method: http.MethodDelete,
+			url:    fmt.Sprintf("%s/keys/%s", ts.URL, tc.id),
+			token:  tc.token,
+		}
+		res, err := req.make()
+		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
+		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
+	}
+}

authn/api/http/requests.go

@@ -0,0 +1,39 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package http
+
+import (
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+)
+
+type issueKeyReq struct {
+	issuer   string
+	Type     uint32        `json:"type,omitempty"`
+	Duration time.Duration `json:"duration,omitempty"`
+}
+
+// It is not possible to issue Reset key using HTTP API.
+func (req issueKeyReq) validate() error {
+	if req.Type == authn.UserKey {
+		return nil
+	}
+	if req.issuer == "" || (req.Type != authn.APIKey) {
+		return authn.ErrMalformedEntity
+	}
+	return nil
+}
+
+type keyReq struct {
+	issuer string
+	id     string
+}
+
+func (req keyReq) validate() error {
+	if req.issuer == "" || req.id == "" {
+		return authn.ErrMalformedEntity
+	}
+	return nil
+}

authn/api/http/responses.go

@@ -0,0 +1,54 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package http
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/mainflux/mainflux"
+)
+
+var (
+	_ mainflux.Response = (*issueKeyRes)(nil)
+	_ mainflux.Response = (*revokeKeyRes)(nil)
+)
+
+type issueKeyRes struct {
+	ID        string     `json:"id,omitempty"`
+	Value     string     `json:"value,omitempty"`
+	IssuedAt  time.Time  `json:"issued_at,omitempty"`
+	ExpiresAt *time.Time `json:"expires_at,omitempty"`
+}
+
+func (res issueKeyRes) Code() int {
+	return http.StatusCreated
+}
+
+func (res issueKeyRes) Headers() map[string]string {
+	return map[string]string{}
+}
+
+func (res issueKeyRes) Empty() bool {
+	return res.Value == ""
+}
+
+type revokeKeyRes struct {
+}
+
+func (res revokeKeyRes) Code() int {
+	return http.StatusNoContent
+}
+
+func (res revokeKeyRes) Headers() map[string]string {
+	return map[string]string{}
+}
+
+func (res revokeKeyRes) Empty() bool {
+	return true
+}
+
+type errorRes struct {
+	Err string `json:"error"`
+}

authn/api/http/transport.go

@@ -0,0 +1,128 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package http
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"strings"
+
+	kitot "github.com/go-kit/kit/tracing/opentracing"
+	kithttp "github.com/go-kit/kit/transport/http"
+	"github.com/go-zoo/bone"
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/opentracing/opentracing-go"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+const contentType = "application/json"
+
+var errUnsupportedContentType = errors.New("unsupported content type")
+
+// MakeHandler returns a HTTP handler for API endpoints.
+func MakeHandler(svc authn.Service, tracer opentracing.Tracer) http.Handler {
+	opts := []kithttp.ServerOption{
+		kithttp.ServerErrorEncoder(encodeError),
+	}
+
+	mux := bone.New()
+
+	mux.Post("/keys", kithttp.NewServer(
+		kitot.TraceServer(tracer, "issue")(issueEndpoint(svc)),
+		decodeIssue,
+		encodeResponse,
+		opts...,
+	))
+
+	mux.Get("/keys/:id", kithttp.NewServer(
+		kitot.TraceServer(tracer, "retrieve")(retrieveEndpoint(svc)),
+		decodeKeyReq,
+		encodeResponse,
+		opts...,
+	))
+
+	mux.Delete("/keys/:id", kithttp.NewServer(
+		kitot.TraceServer(tracer, "revoke")(revokeEndpoint(svc)),
+		decodeKeyReq,
+		encodeResponse,
+		opts...,
+	))
+
+	mux.GetFunc("/version", mainflux.Version("auth"))
+	mux.Handle("/metrics", promhttp.Handler())
+
+	return mux
+}
+
+func decodeIssue(_ context.Context, r *http.Request) (interface{}, error) {
+	if !strings.Contains(r.Header.Get("Content-Type"), contentType) {
+		return nil, errUnsupportedContentType
+	}
+	req := issueKeyReq{
+		issuer: r.Header.Get("Authorization"),
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		return nil, errors.Wrap(authn.ErrMalformedEntity, err)
+	}
+
+	return req, nil
+}
+
+func decodeKeyReq(_ context.Context, r *http.Request) (interface{}, error) {
+	req := keyReq{
+		issuer: r.Header.Get("Authorization"),
+		id:     bone.GetValue(r, "id"),
+	}
+	return req, nil
+}
+
+func encodeResponse(_ context.Context, w http.ResponseWriter, response interface{}) error {
+	w.Header().Set("Content-Type", contentType)
+
+	if ar, ok := response.(mainflux.Response); ok {
+		for k, v := range ar.Headers() {
+			w.Header().Set(k, v)
+		}
+
+		w.WriteHeader(ar.Code())
+
+		if ar.Empty() {
+			return nil
+		}
+	}
+
+	return json.NewEncoder(w).Encode(response)
+}
+
+func encodeError(_ context.Context, err error, w http.ResponseWriter) {
+	switch {
+	case errors.Contains(err, authn.ErrMalformedEntity):
+		w.WriteHeader(http.StatusBadRequest)
+	case errors.Contains(err, authn.ErrUnauthorizedAccess):
+		w.WriteHeader(http.StatusForbidden)
+	case errors.Contains(err, authn.ErrNotFound):
+		w.WriteHeader(http.StatusNotFound)
+	case errors.Contains(err, authn.ErrConflict):
+		w.WriteHeader(http.StatusConflict)
+	case errors.Contains(err, io.EOF):
+		w.WriteHeader(http.StatusBadRequest)
+	case errors.Contains(err, io.ErrUnexpectedEOF):
+		w.WriteHeader(http.StatusBadRequest)
+	case errors.Contains(err, errUnsupportedContentType):
+		w.WriteHeader(http.StatusUnsupportedMediaType)
+	default:
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+	errorVal, ok := err.(errors.Error)
+	if ok {
+		if err := json.NewEncoder(w).Encode(errorRes{Err: errorVal.Msg()}); err != nil {
+			w.Header().Set("Content-Type", contentType)
+			w.WriteHeader(http.StatusInternalServerError)
+		}
+	}
+}

authn/api/logging.go

@@ -0,0 +1,83 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// +build !test
+
+package api
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+	log "github.com/mainflux/mainflux/logger"
+)
+
+var _ authn.Service = (*loggingMiddleware)(nil)
+
+type loggingMiddleware struct {
+	logger log.Logger
+	svc    authn.Service
+}
+
+// LoggingMiddleware adds logging facilities to the core service.
+func LoggingMiddleware(svc authn.Service, logger log.Logger) authn.Service {
+	return &loggingMiddleware{logger, svc}
+}
+
+func (lm *loggingMiddleware) Issue(ctx context.Context, issuer string, newKey authn.Key) (key authn.Key, err error) {
+	defer func(begin time.Time) {
+		d := "infinite duration"
+		if !key.ExpiresAt.IsZero() {
+			d = fmt.Sprintf("the key with expiration date %v", key.ExpiresAt)
+		}
+		message := fmt.Sprintf("Method issue for %s took %s to complete", d, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.Issue(ctx, issuer, newKey)
+}
+
+func (lm *loggingMiddleware) Revoke(ctx context.Context, owner, id string) (err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method revoke for key %s took %s to complete", id, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.Revoke(ctx, owner, id)
+}
+
+func (lm *loggingMiddleware) Retrieve(ctx context.Context, owner, id string) (key authn.Key, err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method retrieve for key %s took %s to complete", id, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.Retrieve(ctx, owner, id)
+}
+
+func (lm *loggingMiddleware) Identify(ctx context.Context, key string) (id string, err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method identify took %s to complete", time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.Identify(ctx, key)
+}

authn/api/metrics.go

@@ -0,0 +1,66 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/metrics"
+	"github.com/mainflux/mainflux/authn"
+)
+
+var _ authn.Service = (*metricsMiddleware)(nil)
+
+type metricsMiddleware struct {
+	counter metrics.Counter
+	latency metrics.Histogram
+	svc     authn.Service
+}
+
+// MetricsMiddleware instruments core service by tracking request count and
+// latency.
+func MetricsMiddleware(svc authn.Service, counter metrics.Counter, latency metrics.Histogram) authn.Service {
+	return &metricsMiddleware{
+		counter: counter,
+		latency: latency,
+		svc:     svc,
+	}
+}
+
+func (ms *metricsMiddleware) Issue(ctx context.Context, issuer string, key authn.Key) (authn.Key, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "issue").Add(1)
+		ms.latency.With("method", "issue").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.Issue(ctx, issuer, key)
+}
+
+func (ms *metricsMiddleware) Revoke(ctx context.Context, issuer, id string) error {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "revoke").Add(1)
+		ms.latency.With("method", "revoke").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.Revoke(ctx, issuer, id)
+}
+
+func (ms *metricsMiddleware) Retrieve(ctx context.Context, issuer, id string) (authn.Key, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "retrieve").Add(1)
+		ms.latency.With("method", "retrieve").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.Retrieve(ctx, issuer, id)
+}
+
+func (ms *metricsMiddleware) Identify(ctx context.Context, key string) (string, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "identify").Add(1)
+		ms.latency.With("method", "identify").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.Identify(ctx, key)
+}

authn/jwt/token_test.go

@@ -0,0 +1,111 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package jwt_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/authn/jwt"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const secret = "test"
+
+func key() authn.Key {
+	exp := time.Now().UTC().Add(10 * time.Minute).Round(time.Second)
+	return authn.Key{
+		ID:        "id",
+		Type:      authn.UserKey,
+		Issuer:    "user@email.com",
+		Secret:    "",
+		IssuedAt:  time.Now().UTC().Add(-10 * time.Second).Round(time.Second),
+		ExpiresAt: exp,
+	}
+}
+
+func TestIssue(t *testing.T) {
+	tokenizer := jwt.New(secret)
+
+	emptyIssuer := key()
+	emptyIssuer.Issuer = ""
+
+	cases := []struct {
+		desc string
+		key  authn.Key
+		err  error
+	}{
+		{
+			desc: "issue new token",
+			key:  key(),
+			err:  nil,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := tokenizer.Issue(tc.key)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s, got %s", tc.desc, tc.err, err))
+	}
+}
+
+func TestParse(t *testing.T) {
+	tokenizer := jwt.New(secret)
+
+	token, err := tokenizer.Issue(key())
+	require.Nil(t, err, fmt.Sprintf("issuing key expected to succeed: %s", err))
+
+	userKey := key()
+	userKey.Type = authn.APIKey
+	userKey.ExpiresAt = time.Now().UTC().Add(-1 * time.Minute).Round(time.Second)
+	userToken, err := tokenizer.Issue(userKey)
+	require.Nil(t, err, fmt.Sprintf("issuing user key expected to succeed: %s", err))
+
+	expKey := key()
+	expKey.ExpiresAt = time.Now().UTC().Add(-1 * time.Minute).Round(time.Second)
+	expToken, err := tokenizer.Issue(expKey)
+	require.Nil(t, err, fmt.Sprintf("issuing expired key expected to succeed: %s", err))
+
+	cases := []struct {
+		desc  string
+		key   authn.Key
+		token string
+		err   error
+	}{
+		{
+			desc:  "parse valid key",
+			key:   key(),
+			token: token,
+			err:   nil,
+		},
+		{
+			desc:  "parse ivalid key",
+			key:   authn.Key{},
+			token: "invalid",
+			err:   authn.ErrUnauthorizedAccess,
+		},
+
+		{
+			desc:  "parse expired key",
+			key:   authn.Key{},
+			token: expToken,
+			err:   authn.ErrKeyExpired,
+		},
+		{
+			desc:  "parse expired user key",
+			key:   userKey,
+			token: userToken,
+			err:   nil,
+		},
+	}
+
+	for _, tc := range cases {
+		key, err := tokenizer.Parse(tc.token)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s, got %s", tc.desc, tc.err, err))
+		assert.Equal(t, tc.key, key, fmt.Sprintf("%s expected %v, got %v", tc.desc, tc.key, key))
+	}
+}

authn/jwt/tokenizer.go

@@ -0,0 +1,97 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package jwt
+
+import (
+	"time"
+
+	"github.com/dgrijalva/jwt-go"
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/pkg/errors"
+)
+
+type claims struct {
+	jwt.StandardClaims
+	Type *uint32 `json:"type,omitempty"`
+}
+
+func (c claims) Valid() error {
+	if c.Type == nil || *c.Type > authn.APIKey {
+		return authn.ErrMalformedEntity
+	}
+
+	return c.StandardClaims.Valid()
+}
+
+type tokenizer struct {
+	secret string
+}
+
+// New returns new JWT Tokenizer.
+func New(secret string) authn.Tokenizer {
+	return tokenizer{secret: secret}
+}
+
+func (svc tokenizer) Issue(key authn.Key) (string, error) {
+	claims := claims{
+		StandardClaims: jwt.StandardClaims{
+			Issuer:   key.Issuer,
+			Subject:  key.Secret,
+			IssuedAt: key.IssuedAt.UTC().Unix(),
+		},
+		Type: &key.Type,
+	}
+
+	if !key.ExpiresAt.IsZero() {
+		claims.ExpiresAt = key.ExpiresAt.UTC().Unix()
+	}
+	if key.ID != "" {
+		claims.Id = key.ID
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(svc.secret))
+}
+
+func (svc tokenizer) Parse(token string) (authn.Key, error) {
+	c := claims{}
+	_, err := jwt.ParseWithClaims(token, &c, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, authn.ErrUnauthorizedAccess
+		}
+		return []byte(svc.secret), nil
+	})
+
+	if err != nil {
+		if e, ok := err.(*jwt.ValidationError); ok && e.Errors == jwt.ValidationErrorExpired {
+			// Expired User key needs to be revoked.
+			if c.Type != nil && *c.Type == authn.APIKey {
+				return c.toKey(), nil
+			}
+			return authn.Key{}, errors.Wrap(authn.ErrKeyExpired, err)
+		}
+		return authn.Key{}, errors.Wrap(authn.ErrUnauthorizedAccess, err)
+	}
+
+	return c.toKey(), nil
+}
+
+func (c claims) toKey() authn.Key {
+	key := authn.Key{
+		ID:       c.Id,
+		Issuer:   c.Issuer,
+		Secret:   c.Subject,
+		IssuedAt: time.Unix(c.IssuedAt, 0).UTC(),
+	}
+	if c.ExpiresAt != 0 {
+		key.ExpiresAt = time.Unix(c.ExpiresAt, 0).UTC()
+	}
+
+	// Default type is 0.
+	if c.Type != nil {
+		key.Type = *c.Type
+	}
+
+	return key
+}

authn/keys.go

@@ -0,0 +1,58 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package authn
+
+import (
+	"context"
+	"errors"
+	"time"
+)
+
+var (
+	// ErrInvalidKeyIssuedAt indicates that the Key is being used before it's issued.
+	ErrInvalidKeyIssuedAt = errors.New("invalid issue time")
+
+	// ErrKeyExpired indicates that the Key is expired.
+	ErrKeyExpired = errors.New("use of expired key")
+)
+
+const (
+	// UserKey is temporary User key received on successfull login.
+	UserKey uint32 = iota
+	// RecoveryKey represents a key for resseting password.
+	RecoveryKey
+	// APIKey enables the one to act on behalf of the user.
+	APIKey
+)
+
+// Key represents API key.
+type Key struct {
+	ID        string
+	Type      uint32
+	Issuer    string
+	Secret    string
+	IssuedAt  time.Time
+	ExpiresAt time.Time
+}
+
+// Expired verifies if the key is expired.
+func (k Key) Expired() bool {
+	if k.Type == APIKey && k.ExpiresAt.IsZero() {
+		return false
+	}
+	return k.ExpiresAt.UTC().Before(time.Now().UTC())
+}
+
+// KeyRepository specifies Key persistence API.
+type KeyRepository interface {
+	// Save persists the Key. A non-nil error is returned to indicate
+	// operation failure
+	Save(context.Context, Key) (string, error)
+
+	// Retrieve retrieves Key by its unique identifier.
+	Retrieve(context.Context, string, string) (Key, error)
+
+	// Remove removes Key with provided ID.
+	Remove(context.Context, string, string) error
+}

authn/keys_test.go

@@ -0,0 +1,60 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package authn_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestExpired(t *testing.T) {
+	exp := time.Now().Add(5 * time.Minute)
+	exp1 := time.Now()
+	cases := []struct {
+		desc    string
+		key     authn.Key
+		expired bool
+	}{
+		{
+			desc: "not expired key",
+			key: authn.Key{
+				IssuedAt:  time.Now(),
+				ExpiresAt: exp,
+			},
+			expired: false,
+		},
+		{
+			desc: "expired key",
+			key: authn.Key{
+				IssuedAt:  time.Now().UTC().Add(2 * time.Minute),
+				ExpiresAt: exp1,
+			},
+			expired: true,
+		},
+		{
+			desc: "user key with no expiration date",
+			key: authn.Key{
+				IssuedAt: time.Now(),
+			},
+			expired: true,
+		},
+		{
+			desc: "API key with no expiration date",
+			key: authn.Key{
+				IssuedAt: time.Now(),
+				Type:     authn.APIKey,
+			},
+			expired: false,
+		},
+	}
+
+	for _, tc := range cases {
+		res := tc.key.Expired()
+		assert.Equal(t, tc.expired, res, fmt.Sprintf("%s: expected %t got %t\n", tc.desc, tc.expired, res))
+	}
+}

authn/mocks/keys.go

@@ -0,0 +1,55 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package mocks
+
+import (
+	"context"
+	"sync"
+
+	"github.com/mainflux/mainflux/authn"
+)
+
+var _ authn.KeyRepository = (*keyRepositoryMock)(nil)
+
+type keyRepositoryMock struct {
+	mu   sync.Mutex
+	keys map[string]authn.Key
+}
+
+// NewKeyRepository creates in-memory user repository
+func NewKeyRepository() authn.KeyRepository {
+	return &keyRepositoryMock{
+		keys: make(map[string]authn.Key),
+	}
+}
+
+func (krm *keyRepositoryMock) Save(ctx context.Context, key authn.Key) (string, error) {
+	krm.mu.Lock()
+	defer krm.mu.Unlock()
+
+	if _, ok := krm.keys[key.ID]; ok {
+		return "", authn.ErrConflict
+	}
+
+	krm.keys[key.ID] = key
+	return key.ID, nil
+}
+func (krm *keyRepositoryMock) Retrieve(ctx context.Context, issuer, id string) (authn.Key, error) {
+	krm.mu.Lock()
+	defer krm.mu.Unlock()
+
+	if key, ok := krm.keys[id]; ok && key.Issuer == issuer {
+		return key, nil
+	}
+
+	return authn.Key{}, authn.ErrNotFound
+}
+func (krm *keyRepositoryMock) Remove(ctx context.Context, issuer, id string) error {
+	krm.mu.Lock()
+	defer krm.mu.Unlock()
+	if key, ok := krm.keys[id]; ok && key.Issuer == issuer {
+		delete(krm.keys, id)
+	}
+	return nil
+}

authn/openapi.yml

@@ -0,0 +1,147 @@
+openapi: 3.0.1
+info:
+  title: Mainflux authentication service
+  description: HTTP API for managing platform API keys.
+  version: "1.0.0"
+
+paths:
+  /keys:
+    post:
+      summary: Issue API key
+      description: |
+        Generates a new API key. Thew new API key will
+        be uniquely identified by its ID.
+      tags:
+        - authn
+      requestBody:
+        $ref: "#/components/requestBodies/KeyRequest"
+      responses:
+        201:
+          description: Issued new key.
+        400:
+          description: Failed due to malformed JSON.
+        409:
+          description: Failed due to using already existing ID.
+        415:
+          description: Missing or invalid content type.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /keys/{id}:
+    get:
+      summary: Gets API key details.
+      description: |
+        Gets API key details for the given key.
+      tags:
+        - authn
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ID"
+      responses:
+        200:
+          $ref: "#/components/responses/KeyRes"
+        400:
+          description: Failed due to malformed query parameters.
+        403:
+          description: Missing or invalid access token provided.
+        500:
+          $ref: "#/components/responses/ServiceError"
+    delete:
+      summary: Revoke API key
+      description: |
+        Revoke API key identified by the given ID.
+      tags:
+        - authn
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ID"
+      responses:
+        204:
+          description: Key revoked.
+        403:
+          description: Missing or invalid access token provided.
+        500:
+          $ref: "#/components/responses/ServiceError"
+
+components:
+  schemas:
+    Key:
+      type: object
+      properties:
+        id:
+          type: string
+          format: uuid
+          example: "c5747f2f-2a7c-4fe1-b41a-51a5ae290945"
+          description: API key unique identifier
+        type:
+          type: integer
+          example: 0
+          description: API key type. Keys of different type are processed differently
+        issuer:
+          type: string
+          format: string
+          example: "test@example.com"
+          description: User's email or service identifier of API key issuer
+        secret:
+          type: string
+          example: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiZXhhbXBsZSIsImlhdCI6MTUxNjIzOTAyMn0.9UYAFWmPIn4ojss36LpIGSqABZHfADQmVuKQ4PJBMdI
+          description: API Key value.
+        issued_at:
+          type: string
+          format: date-time
+          example: "2019-11-26 13:31:52"
+          description: Time when the key is generated
+        expires_at:
+          type: string
+          format: date-time
+          example: "2019-11-26 13:31:52"
+          description: Time when the Key expires
+
+  parameters:
+    Authorization:
+      name: Authorization
+      description: Login key secret (User's access token).
+      in: header
+      schema:
+        type: string
+      required: true
+    ID:
+      name: id
+      description: API Key id.
+      in: path
+      schema:
+        type: string
+      required: true
+
+  requestBodies:
+    KeyRequest:
+      description: JSON-formatted document describing key request.
+      required: true
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              type:
+                type: integer
+                example: 0
+                description: API key type. Keys of different type are processed differently
+              issuer:
+                type: string
+                format: e-mail
+                example: "test@example.com"
+                description: User's email or service identifier of API key issuer
+              duration:
+                type: number
+                format: integer
+                example: 23456
+                description: Number of seconds issued token is valid for.
+
+  responses:
+    ServiceError:
+      description: Unexpected server-side error occurred.
+    KeyRes:
+      description: Data retrieved.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Key"

authn/postgres/doc.go

@@ -0,0 +1,6 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package postgres contains Key repository implementations using
+// PostgreSQL as the underlying database.
+package postgres

authn/postgres/init.go

@@ -0,0 +1,65 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres
+
+import (
+	"fmt"
+
+	"github.com/jmoiron/sqlx"
+	migrate "github.com/rubenv/sql-migrate"
+)
+
+// Config defines the options that are used when connecting to a PostgreSQL instance
+type Config struct {
+	Host        string
+	Port        string
+	User        string
+	Pass        string
+	Name        string
+	SSLMode     string
+	SSLCert     string
+	SSLKey      string
+	SSLRootCert string
+}
+
+// Connect creates a connection to the PostgreSQL instance and applies any
+// unapplied database migrations. A non-nil error is returned to indicate
+// failure.
+func Connect(cfg Config) (*sqlx.DB, error) {
+	url := fmt.Sprintf("host=%s port=%s user=%s dbname=%s password=%s sslmode=%s sslcert=%s sslkey=%s sslrootcert=%s", cfg.Host, cfg.Port, cfg.User, cfg.Name, cfg.Pass, cfg.SSLMode, cfg.SSLCert, cfg.SSLKey, cfg.SSLRootCert)
+
+	db, err := sqlx.Open("postgres", url)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := migrateDB(db); err != nil {
+		return nil, err
+	}
+	return db, nil
+}
+
+func migrateDB(db *sqlx.DB) error {
+	migrations := &migrate.MemoryMigrationSource{
+		Migrations: []*migrate.Migration{
+			{
+				Id: "authn",
+				Up: []string{
+					`CREATE TABLE IF NOT EXISTS keys (
+						id          UUID NOT NULL,
+						type        SMALLINT,
+						issuer      VARCHAR(254) NOT NULL,
+						issued_at   TIMESTAMP NOT NULL,
+						expires_at  TIMESTAMP,
+						PRIMARY KEY (id, issuer)
+					)`,
+				},
+				Down: []string{"DROP TABLE IF EXISTS keys"},
+			},
+		},
+	}
+
+	_, err := migrate.Exec(db.DB, "postgres", migrations, migrate.Up)
+	return err
+}

authn/postgres/key.go

@@ -0,0 +1,119 @@
+package postgres
+
+import (
+	"context"
+	"database/sql"
+	"time"
+
+	"github.com/lib/pq"
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/pkg/errors"
+)
+
+var (
+	errSave     = errors.New("failed to save key in database")
+	errRetrieve = errors.New("failed to retrieve key from database")
+	errDelete   = errors.New("failed to delete key from database")
+)
+var _ authn.KeyRepository = (*repo)(nil)
+
+const (
+	errDuplicate = "unique_violation"
+	errInvalid   = "invalid_text_representation"
+)
+
+type repo struct {
+	db Database
+}
+
+// New instantiates a PostgreSQL implementation of key repository.
+func New(db Database) authn.KeyRepository {
+	return &repo{
+		db: db,
+	}
+}
+
+func (kr repo) Save(ctx context.Context, key authn.Key) (string, error) {
+	q := `INSERT INTO keys (id, type, issuer, issued_at, expires_at)
+	      VALUES (:id, :type, :issuer, :issued_at, :expires_at)`
+
+	dbKey := toDBKey(key)
+	if _, err := kr.db.NamedExecContext(ctx, q, dbKey); err != nil {
+
+		pqErr, ok := err.(*pq.Error)
+		if ok {
+			if pqErr.Code.Name() == errDuplicate {
+				return "", errors.Wrap(authn.ErrConflict, pqErr)
+			}
+		}
+
+		return "", errors.Wrap(errSave, err)
+	}
+
+	return dbKey.ID, nil
+}
+
+func (kr repo) Retrieve(ctx context.Context, issuer, id string) (authn.Key, error) {
+	q := `SELECT id, type, issuer, issued_at, expires_at FROM keys WHERE issuer = $1 AND id = $2`
+	key := dbKey{}
+	if err := kr.db.QueryRowxContext(ctx, q, issuer, id).StructScan(&key); err != nil {
+		pqErr, ok := err.(*pq.Error)
+		if err == sql.ErrNoRows || ok && errInvalid == pqErr.Code.Name() {
+			return authn.Key{}, errors.Wrap(authn.ErrNotFound, err)
+		}
+
+		return authn.Key{}, errors.Wrap(errRetrieve, err)
+	}
+
+	return toKey(key), nil
+}
+
+func (kr repo) Remove(ctx context.Context, issuer, id string) error {
+	q := `DELETE FROM keys WHERE issuer = :issuer AND id = :id`
+	key := dbKey{
+		ID:     id,
+		Issuer: issuer,
+	}
+	if _, err := kr.db.NamedExecContext(ctx, q, key); err != nil {
+		return errors.Wrap(errDelete, err)
+	}
+
+	return nil
+}
+
+type dbKey struct {
+	ID        string       `db:"id"`
+	Type      uint32       `db:"type"`
+	Issuer    string       `db:"issuer"`
+	Revoked   bool         `db:"revoked"`
+	IssuedAt  time.Time    `db:"issued_at"`
+	ExpiresAt sql.NullTime `db:"expires_at"`
+}
+
+func toDBKey(key authn.Key) dbKey {
+	ret := dbKey{
+		ID:       key.ID,
+		Type:     key.Type,
+		Issuer:   key.Issuer,
+		IssuedAt: key.IssuedAt,
+	}
+	if !key.ExpiresAt.IsZero() {
+		ret.ExpiresAt = sql.NullTime{Time: key.ExpiresAt, Valid: true}
+	}
+
+	return ret
+}
+
+func toKey(key dbKey) authn.Key {
+	ret := authn.Key{
+		ID:       key.ID,
+		Type:     key.Type,
+		Issuer:   key.Issuer,
+		IssuedAt: key.IssuedAt,
+	}
+	if key.ExpiresAt.Valid {
+		ret.ExpiresAt = key.ExpiresAt.Time
+	}
+
+	return ret
+}

authn/postgres/key_test.go

@@ -0,0 +1,146 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/authn/postgres"
+	"github.com/mainflux/mainflux/pkg/errors"
+	uuidProvider "github.com/mainflux/mainflux/pkg/uuid"
+	"github.com/opentracing/opentracing-go"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestKeySave(t *testing.T) {
+	dbMiddleware := postgres.NewDatabase(db)
+	repo := postgres.New(dbMiddleware)
+
+	email := "user-save@example.com"
+	expTime := time.Now().Add(5 * time.Minute)
+	id, _ := uuidProvider.New().ID()
+	cases := []struct {
+		desc string
+		key  authn.Key
+		err  error
+	}{
+		{
+			desc: "save a new key",
+			key: authn.Key{
+				Issuer:    email,
+				IssuedAt:  time.Now(),
+				ExpiresAt: expTime,
+				ID:        id,
+			},
+			err: nil,
+		},
+		{
+			desc: "save with duplicate id",
+			key: authn.Key{
+				Issuer:    email,
+				IssuedAt:  time.Now(),
+				ExpiresAt: expTime,
+				ID:        id,
+			},
+			err: authn.ErrConflict,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := repo.Save(context.Background(), tc.key)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+
+func TestKeyRetrieve(t *testing.T) {
+	dbMiddleware := postgres.NewDatabase(db)
+	repo := postgres.New(dbMiddleware)
+
+	email := "user-save@example.com"
+	expTime := time.Now().Add(5 * time.Minute)
+	id, _ := uuidProvider.New().ID()
+	key := authn.Key{
+		Issuer:    email,
+		IssuedAt:  time.Now(),
+		ExpiresAt: expTime,
+		ID:        id,
+	}
+	_, err := repo.Save(context.Background(), key)
+	assert.Nil(t, err, fmt.Sprintf("Storing Key expected to succeed: %s", err))
+	cases := []struct {
+		desc   string
+		id     string
+		issuer string
+		err    error
+	}{
+		{
+			desc:   "retrieve an existing key",
+			id:     key.ID,
+			issuer: key.Issuer,
+			err:    nil,
+		},
+		{
+			desc:   "retrieve unauthorized",
+			id:     key.ID,
+			issuer: "",
+			err:    authn.ErrNotFound,
+		},
+		{
+			desc:   "retrieve unknown key",
+			id:     "",
+			issuer: key.Issuer,
+			err:    authn.ErrNotFound,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := repo.Retrieve(context.Background(), tc.issuer, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+
+func TestKeyRemove(t *testing.T) {
+	dbMiddleware := postgres.NewDatabase(db)
+	repo := postgres.New(dbMiddleware)
+
+	email := "user-save@example.com"
+	expTime := time.Now().Add(5 * time.Minute)
+	id, _ := uuidProvider.New().ID()
+	key := authn.Key{
+		Issuer:    email,
+		IssuedAt:  time.Now(),
+		ExpiresAt: expTime,
+		ID:        id,
+	}
+	_, err := repo.Save(opentracing.ContextWithSpan(context.Background(), opentracing.StartSpan("")), key)
+	assert.Nil(t, err, fmt.Sprintf("Storing Key expected to succeed: %s", err))
+	cases := []struct {
+		desc   string
+		id     string
+		issuer string
+		err    error
+	}{
+		{
+			desc:   "remove an existing key",
+			id:     key.ID,
+			issuer: key.Issuer,
+			err:    nil,
+		},
+		{
+			desc:   "remove key that does not exist",
+			id:     key.ID,
+			issuer: key.Issuer,
+			err:    nil,
+		},
+	}
+
+	for _, tc := range cases {
+		err := repo.Remove(context.Background(), tc.issuer, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}

authn/postgres/setup_test.go

@@ -0,0 +1,78 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package postgres_test contains tests for PostgreSQL repository
+// implementations.
+package postgres_test
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+	"testing"
+
+	"github.com/jmoiron/sqlx"
+	"github.com/mainflux/mainflux/authn/postgres"
+	dockertest "github.com/ory/dockertest/v3"
+)
+
+const wrong string = "wrong-value"
+
+var db *sqlx.DB
+
+func TestMain(m *testing.M) {
+	pool, err := dockertest.NewPool("")
+	if err != nil {
+		log.Fatalf("Could not connect to docker: %s", err)
+	}
+
+	cfg := []string{
+		"POSTGRES_USER=test",
+		"POSTGRES_PASSWORD=test",
+		"POSTGRES_DB=test",
+	}
+	container, err := pool.Run("postgres", "10.2-alpine", cfg)
+	if err != nil {
+		log.Fatalf("Could not start container: %s", err)
+	}
+
+	port := container.GetPort("5432/tcp")
+
+	if err := pool.Retry(func() error {
+		url := fmt.Sprintf("host=localhost port=%s user=test dbname=test password=test sslmode=disable", port)
+		db, err := sql.Open("postgres", url)
+		if err != nil {
+			return err
+		}
+		return db.Ping()
+	}); err != nil {
+		log.Fatalf("Could not connect to docker: %s", err)
+	}
+
+	dbConfig := postgres.Config{
+		Host:        "localhost",
+		Port:        port,
+		User:        "test",
+		Pass:        "test",
+		Name:        "test",
+		SSLMode:     "disable",
+		SSLCert:     "",
+		SSLKey:      "",
+		SSLRootCert: "",
+	}
+
+	if db, err = postgres.Connect(dbConfig); err != nil {
+		log.Fatalf("Could not setup test DB connection: %s", err)
+	}
+
+	code := m.Run()
+
+	// Defers will not be run when using os.Exit
+	db.Close()
+	if err := pool.Purge(container); err != nil {
+		log.Fatalf("Could not purge container: %s", err)
+	}
+
+	os.Exit(code)
+}

authn/postgres/tracing.go

@@ -0,0 +1,51 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/jmoiron/sqlx"
+	"github.com/opentracing/opentracing-go"
+)
+
+var _ Database = (*database)(nil)
+
+type database struct {
+	db *sqlx.DB
+}
+
+// Database provides a database interface
+type Database interface {
+	NamedExecContext(context.Context, string, interface{}) (sql.Result, error)
+	QueryRowxContext(context.Context, string, ...interface{}) *sqlx.Row
+}
+
+// NewDatabase creates a ThingDatabase instance
+func NewDatabase(db *sqlx.DB) Database {
+	return &database{
+		db: db,
+	}
+}
+
+func (d database) NamedExecContext(ctx context.Context, query string, args interface{}) (sql.Result, error) {
+	addSpanTags(ctx, query)
+	return d.db.NamedExecContext(ctx, query, args)
+}
+
+func (d database) QueryRowxContext(ctx context.Context, query string, args ...interface{}) *sqlx.Row {
+	addSpanTags(ctx, query)
+	return d.db.QueryRowxContext(ctx, query, args...)
+}
+
+func addSpanTags(ctx context.Context, query string) {
+	span := opentracing.SpanFromContext(ctx)
+	if span != nil {
+		span.SetTag("sql.statement", query)
+		span.SetTag("span.kind", "client")
+		span.SetTag("peer.service", "postgres")
+		span.SetTag("db.type", "sql")
+	}
+}

authn/service.go

@@ -0,0 +1,193 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package authn
+
+import (
+	"context"
+	"time"
+
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/pkg/errors"
+)
+
+const (
+	loginDuration    = 10 * time.Hour
+	recoveryDuration = 5 * time.Minute
+	issuerName       = "mainflux.authn"
+)
+
+var (
+	// ErrUnauthorizedAccess represents unauthorized access.
+	ErrUnauthorizedAccess = errors.New("unauthorized access")
+
+	// ErrMalformedEntity indicates malformed entity specification (e.g.
+	// invalid owner or ID).
+	ErrMalformedEntity = errors.New("malformed entity specification")
+
+	// ErrNotFound indicates a non-existing entity request.
+	ErrNotFound = errors.New("entity not found")
+
+	// ErrConflict indicates that entity already exists.
+	ErrConflict = errors.New("entity already exists")
+
+	errIssueUser = errors.New("failed to issue new user key")
+	errIssueTmp  = errors.New("failed to issue new temporary key")
+	errRevoke    = errors.New("failed to remove key")
+	errRetrieve  = errors.New("failed to retrieve key data")
+	errIdentify  = errors.New("failed to validate token")
+)
+
+// Service specifies an API that must be fullfiled by the domain service
+// implementation, and all of its decorators (e.g. logging & metrics).
+type Service interface {
+	// Issue issues a new Key.
+	Issue(context.Context, string, Key) (Key, error)
+
+	// Revoke removes the Key with the provided id that is
+	// issued by the user identified by the provided key.
+	Revoke(context.Context, string, string) error
+
+	// Retrieve retrieves data for the Key identified by the provided
+	// ID, that is issued by the user identified by the provided key.
+	Retrieve(context.Context, string, string) (Key, error)
+
+	// Identify validates token token. If token is valid, content
+	// is returned. If token is invalid, or invocation failed for some
+	// other reason, non-nil error value is returned in response.
+	Identify(context.Context, string) (string, error)
+}
+
+var _ Service = (*service)(nil)
+
+type service struct {
+	keys         KeyRepository
+	uuidProvider mainflux.UUIDProvider
+	tokenizer    Tokenizer
+}
+
+// New instantiates the auth service implementation.
+func New(keys KeyRepository, up mainflux.UUIDProvider, tokenizer Tokenizer) Service {
+	return &service{
+		tokenizer:    tokenizer,
+		keys:         keys,
+		uuidProvider: up,
+	}
+}
+
+func (svc service) Issue(ctx context.Context, issuer string, key Key) (Key, error) {
+	if key.IssuedAt.IsZero() {
+		return Key{}, ErrInvalidKeyIssuedAt
+	}
+	switch key.Type {
+	case APIKey:
+		return svc.userKey(ctx, issuer, key)
+	case RecoveryKey:
+		return svc.tmpKey(issuer, recoveryDuration, key)
+	default:
+		return svc.tmpKey(issuer, loginDuration, key)
+	}
+}
+
+func (svc service) Revoke(ctx context.Context, issuer, id string) error {
+	email, err := svc.login(issuer)
+	if err != nil {
+		return errors.Wrap(errRevoke, err)
+	}
+	if err := svc.keys.Remove(ctx, email, id); err != nil {
+		return errors.Wrap(errRevoke, err)
+	}
+	return nil
+}
+
+func (svc service) Retrieve(ctx context.Context, issuer, id string) (Key, error) {
+	email, err := svc.login(issuer)
+	if err != nil {
+		return Key{}, errors.Wrap(errRetrieve, err)
+	}
+
+	return svc.keys.Retrieve(ctx, email, id)
+}
+
+func (svc service) Identify(ctx context.Context, token string) (string, error) {
+	c, err := svc.tokenizer.Parse(token)
+	if err != nil {
+		return "", errors.Wrap(errIdentify, err)
+	}
+
+	switch c.Type {
+	case APIKey:
+		k, err := svc.keys.Retrieve(ctx, c.Issuer, c.ID)
+		if err != nil {
+			return "", err
+		}
+		// Auto revoke expired key.
+		if k.Expired() {
+			svc.keys.Remove(ctx, c.Issuer, c.ID)
+			return "", ErrKeyExpired
+		}
+		return c.Issuer, nil
+	case RecoveryKey, UserKey:
+		if c.Issuer != issuerName {
+			return "", ErrUnauthorizedAccess
+		}
+		return c.Secret, nil
+	default:
+		return "", ErrUnauthorizedAccess
+	}
+}
+
+func (svc service) tmpKey(issuer string, duration time.Duration, key Key) (Key, error) {
+	key.Secret = issuer
+	key.Issuer = issuerName
+	key.ExpiresAt = key.IssuedAt.Add(duration)
+	val, err := svc.tokenizer.Issue(key)
+	if err != nil {
+		return Key{}, errors.Wrap(errIssueTmp, err)
+	}
+
+	key.Secret = val
+	return key, nil
+}
+
+func (svc service) userKey(ctx context.Context, issuer string, key Key) (Key, error) {
+	email, err := svc.login(issuer)
+	if err != nil {
+		return Key{}, errors.Wrap(errIssueUser, err)
+	}
+	key.Issuer = email
+
+	id, err := svc.uuidProvider.ID()
+	if err != nil {
+		return Key{}, errors.Wrap(errIssueUser, err)
+	}
+	key.ID = id
+
+	value, err := svc.tokenizer.Issue(key)
+	if err != nil {
+		return Key{}, errors.Wrap(errIssueUser, err)
+	}
+	key.Secret = value
+
+	if _, err := svc.keys.Save(ctx, key); err != nil {
+		return Key{}, errors.Wrap(errIssueUser, err)
+	}
+
+	return key, nil
+}
+
+func (svc service) login(token string) (string, error) {
+	c, err := svc.tokenizer.Parse(token)
+	if err != nil {
+		return "", err
+	}
+	// Only user key token is valid for login.
+	if c.Type != UserKey {
+		return "", ErrUnauthorizedAccess
+	}
+
+	if c.Secret == "" {
+		return "", ErrUnauthorizedAccess
+	}
+	return c.Secret, nil
+}

authn/service_test.go

@@ -0,0 +1,280 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package authn_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/mainflux/mainflux/authn"
+	"github.com/mainflux/mainflux/authn/jwt"
+	"github.com/mainflux/mainflux/authn/mocks"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/mainflux/mainflux/pkg/uuid"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	secret = "secret"
+	email  = "test@example.com"
+)
+
+func newService() authn.Service {
+	repo := mocks.NewKeyRepository()
+	uuidProvider := uuid.NewMock()
+	t := jwt.New(secret)
+	return authn.New(repo, uuidProvider, t)
+}
+
+func TestIssue(t *testing.T) {
+	svc := newService()
+	userKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+
+	cases := []struct {
+		desc   string
+		key    authn.Key
+		issuer string
+		err    error
+	}{
+		{
+			desc: "issue user key",
+			key: authn.Key{
+				Type:     authn.UserKey,
+				IssuedAt: time.Now(),
+			},
+			issuer: email,
+			err:    nil,
+		},
+		{
+			desc: "issue user key no issue time",
+			key: authn.Key{
+				Type: authn.UserKey,
+			},
+			issuer: email,
+			err:    authn.ErrInvalidKeyIssuedAt,
+		},
+		{
+			desc: "issue API key",
+			key: authn.Key{
+				Type:     authn.APIKey,
+				IssuedAt: time.Now(),
+			},
+			issuer: userKey.Secret,
+			err:    nil,
+		},
+		{
+			desc: "issue API key unauthorized",
+			key: authn.Key{
+				Type:     authn.APIKey,
+				IssuedAt: time.Now(),
+			},
+			issuer: "",
+			err:    authn.ErrUnauthorizedAccess,
+		},
+		{
+			desc: "issue API key no issue time",
+			key: authn.Key{
+				Type: authn.APIKey,
+			},
+			issuer: userKey.Secret,
+			err:    authn.ErrInvalidKeyIssuedAt,
+		},
+		{
+			desc: "issue recovery key",
+			key: authn.Key{
+				Type:     authn.RecoveryKey,
+				IssuedAt: time.Now(),
+			},
+			issuer: userKey.Secret,
+			err:    nil,
+		},
+		{
+			desc: "issue recovery key no issue time",
+			key: authn.Key{
+				Type: authn.RecoveryKey,
+			},
+			issuer: userKey.Secret,
+			err:    authn.ErrInvalidKeyIssuedAt,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := svc.Issue(context.Background(), tc.issuer, tc.key)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+func TestRevoke(t *testing.T) {
+	svc := newService()
+	loginKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+	key := authn.Key{
+		Type:     authn.APIKey,
+		IssuedAt: time.Now(),
+	}
+	newKey, err := svc.Issue(context.Background(), loginKey.Secret, key)
+	assert.Nil(t, err, fmt.Sprintf("Issuing user's key expected to succeed: %s", err))
+
+	cases := []struct {
+		desc   string
+		id     string
+		issuer string
+		err    error
+	}{
+		{
+			desc:   "revoke user key",
+			id:     newKey.ID,
+			issuer: loginKey.Secret,
+			err:    nil,
+		},
+		{
+			desc:   "revoke non-existing user key",
+			id:     newKey.ID,
+			issuer: loginKey.Secret,
+			err:    nil,
+		},
+		{
+			desc:   "revoke unauthorized",
+			id:     newKey.ID,
+			issuer: "",
+			err:    authn.ErrUnauthorizedAccess,
+		},
+	}
+
+	for _, tc := range cases {
+		err := svc.Revoke(context.Background(), tc.issuer, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+func TestRetrieve(t *testing.T) {
+	svc := newService()
+	loginKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+	key := authn.Key{
+		ID:       "id",
+		Type:     authn.APIKey,
+		IssuedAt: time.Now(),
+	}
+	newKey, err := svc.Issue(context.Background(), loginKey.Secret, key)
+	assert.Nil(t, err, fmt.Sprintf("Issuing user's key expected to succeed: %s", err))
+
+	resetKey, err := svc.Issue(context.Background(), loginKey.Secret, authn.Key{Type: authn.RecoveryKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing reset key expected to succeed: %s", err))
+
+	userKey, err := svc.Issue(context.Background(), loginKey.Secret, authn.Key{Type: authn.APIKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	cases := []struct {
+		desc   string
+		id     string
+		issuer string
+		err    error
+	}{
+		{
+			desc:   "retrieve user key",
+			id:     newKey.ID,
+			issuer: loginKey.Secret,
+			err:    nil,
+		},
+		{
+			desc:   "retrieve non-existing user key",
+			id:     "invalid",
+			issuer: loginKey.Secret,
+			err:    authn.ErrNotFound,
+		},
+		{
+			desc:   "retrieve unauthorized",
+			id:     newKey.ID,
+			issuer: "wrong",
+			err:    authn.ErrUnauthorizedAccess,
+		},
+		{
+			desc:   "retrieve with user key",
+			id:     newKey.ID,
+			issuer: userKey.Secret,
+			err:    authn.ErrUnauthorizedAccess,
+		},
+		{
+			desc:   "retrieve with reset key",
+			id:     newKey.ID,
+			issuer: resetKey.Secret,
+			err:    authn.ErrUnauthorizedAccess,
+		},
+	}
+
+	for _, tc := range cases {
+		_, err := svc.Retrieve(context.Background(), tc.issuer, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+func TestIdentify(t *testing.T) {
+	svc := newService()
+	loginKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.UserKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing login key expected to succeed: %s", err))
+
+	recoveryKey, err := svc.Issue(context.Background(), email, authn.Key{Type: authn.RecoveryKey, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing reset key expected to succeed: %s", err))
+
+	userKey, err := svc.Issue(context.Background(), loginKey.Secret, authn.Key{Type: authn.APIKey, IssuedAt: time.Now(), ExpiresAt: time.Now().Add(time.Minute)})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	exp1 := time.Now().Add(-2 * time.Second)
+	expKey, err := svc.Issue(context.Background(), loginKey.Secret, authn.Key{Type: authn.APIKey, IssuedAt: time.Now(), ExpiresAt: exp1})
+	assert.Nil(t, err, fmt.Sprintf("Issuing expired user key expected to succeed: %s", err))
+
+	invalidKey, err := svc.Issue(context.Background(), loginKey.Secret, authn.Key{Type: 22, IssuedAt: time.Now()})
+	assert.Nil(t, err, fmt.Sprintf("Issuing user key expected to succeed: %s", err))
+
+	cases := []struct {
+		desc string
+		key  string
+		id   string
+		err  error
+	}{
+		{
+			desc: "identify login key",
+			key:  loginKey.Secret,
+			id:   email,
+			err:  nil,
+		},
+		{
+			desc: "identify recovery key",
+			key:  recoveryKey.Secret,
+			id:   email,
+			err:  nil,
+		},
+		{
+			desc: "identify user key",
+			key:  userKey.Secret,
+			id:   email,
+			err:  nil,
+		},
+		{
+			desc: "identify expired user key",
+			key:  expKey.Secret,
+			id:   "",
+			err:  authn.ErrKeyExpired,
+		},
+		{
+			desc: "identify expired key",
+			key:  invalidKey.Secret,
+			id:   "",
+			err:  authn.ErrUnauthorizedAccess,
+		},
+		{
+			desc: "identify invalid key",
+			key:  "invalid",
+			id:   "",
+			err:  authn.ErrUnauthorizedAccess,
+		},
+	}
+
+	for _, tc := range cases {
+		id, err := svc.Identify(context.Background(), tc.key)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s expected %s got %s\n", tc.desc, tc.err, err))
+		assert.Equal(t, tc.id, id, fmt.Sprintf("%s expected %s got %s\n", tc.desc, tc.id, id))
+	}
+}

authn/tokenizer.go

@@ -0,0 +1,13 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package authn
+
+// Tokenizer specifies API for encoding and decoding between string and Key.
+type Tokenizer interface {
+	// Issue converts API Key to its string representation.
+	Issue(Key) (string, error)
+
+	// Parse extracts API Key data from string token.
+	Parse(string) (Key, error)
+}

authn/tracing/keys.go

@@ -0,0 +1,72 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package tracing contains middlewares that will add spans
+// to existing traces.
+package tracing
+
+import (
+	"context"
+
+	"github.com/mainflux/mainflux/authn"
+	opentracing "github.com/opentracing/opentracing-go"
+)
+
+const (
+	saveOp     = "save"
+	retrieveOp = "retrieve_by_id"
+	revokeOp   = "remove"
+)
+
+var _ authn.KeyRepository = (*keyRepositoryMiddleware)(nil)
+
+// keyRepositoryMiddleware tracks request and their latency, and adds spans
+// to context.
+type keyRepositoryMiddleware struct {
+	tracer opentracing.Tracer
+	repo   authn.KeyRepository
+}
+
+// New tracks request and their latency, and adds spans
+// to context.
+func New(repo authn.KeyRepository, tracer opentracing.Tracer) authn.KeyRepository {
+	return keyRepositoryMiddleware{
+		tracer: tracer,
+		repo:   repo,
+	}
+}
+
+func (krm keyRepositoryMiddleware) Save(ctx context.Context, key authn.Key) (string, error) {
+	span := createSpan(ctx, krm.tracer, saveOp)
+	defer span.Finish()
+	ctx = opentracing.ContextWithSpan(ctx, span)
+
+	return krm.repo.Save(ctx, key)
+}
+
+func (krm keyRepositoryMiddleware) Retrieve(ctx context.Context, owner, id string) (authn.Key, error) {
+	span := createSpan(ctx, krm.tracer, retrieveOp)
+	defer span.Finish()
+	ctx = opentracing.ContextWithSpan(ctx, span)
+
+	return krm.repo.Retrieve(ctx, owner, id)
+}
+
+func (krm keyRepositoryMiddleware) Remove(ctx context.Context, owner, id string) error {
+	span := createSpan(ctx, krm.tracer, revokeOp)
+	defer span.Finish()
+	ctx = opentracing.ContextWithSpan(ctx, span)
+
+	return krm.repo.Remove(ctx, owner, id)
+}
+
+func createSpan(ctx context.Context, tracer opentracing.Tracer, opName string) opentracing.Span {
+	if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
+		return tracer.StartSpan(
+			opName,
+			opentracing.ChildOf(parentSpan.Context()),
+		)
+	}
+
+	return tracer.StartSpan(opName)
+}

bootstrap/README.md

@@ -1,6 +1,7 @@
 # BOOTSTRAP SERVICE
 
 New devices need to be configured properly and connected to the Mainflux. Bootstrap service is used in order to accomplish that. This service provides the following features:
+
   1) Creating new Mainflux Things
   2) Providing basic configuration for the newly created Things
   3) Enabling/disabling Things
@@ -9,9 +10,10 @@ Pre-provisioning a new Thing is as simple as sending Configuration data to the B
 
 In order to bootstrap successfully, the Thing needs to send bootstrapping request to the specific URL, as well as a secret key. This key and URL are pre-provisioned during the manufacturing process. If the Thing is provisioned on the Bootstrap service side, the corresponding configuration will be sent as a response. Otherwise, the Thing will be saved so that it can be provisioned later.
 
-***Thing Configuration***
+## Thing Configuration Entity
 
 Thing Configuration consists of two logical parts: the custom configuration that can be interpreted by the Thing itself and Mainflux-related configuration. Mainflux config contains:
+
   1) corresponding Mainflux Thing ID
   2) corresponding Mainflux Thing key
   3) list of the Mainflux channels the Thing is connected to
@@ -27,34 +29,42 @@ Enabling and disabling Thing (adding Thing to/from whitelist) is as simple as co
 
 Switching between states `Active` and `Inactive` enables and disables Thing, respectively.
 
+Thing configuration also contains the so-called `external ID` and `external key`. An external ID is a unique identifier of corresponding Thing. For example, a device MAC address is a good choice for external ID. External key is a secret key that is used for authentication during the bootstrapping procedure.
+
 ## Configuration
 
 The service is configured using the environment variables presented in the following table. Note that any unset variables will be replaced with their default values.
 
-| Variable                      | Description                                                             | Default               |
-|-------------------------------|-------------------------------------------------------------------------|-----------------------|
-| MF_BOOTSTRAP_LOG_LEVEL        | Log level for Bootstrap (debug, info, warn, error)                      | error                 |
-| MF_BOOTSTRAP_DB_HOST          | Database host address                                                   | localhost             |
-| MF_BOOTSTRAP_DB_PORT          | Database host port                                                      | 5432                  |
-| MF_BOOTSTRAP_DB_USER          | Database user                                                           | mainflux              |
-| MF_BOOTSTRAP_DB_PASS          | Database password                                                       | mainflux              |
-| MF_BOOTSTRAP_DB               | Name of the database used by the service                                | bootstrap             |
-| MF_BOOTSTRAP_DB_SSL_MODE      | Database connection SSL mode (disable, require, verify-ca, verify-full) | disable               |
-| MF_BOOTSTRAP_DB_SSL_CERT      | Path to the PEM encoded certificate file                                |                       |
-| MF_BOOTSTRAP_DB_SSL_KEY       | Path to the PEM encoded key file                                        |                       |
-| MF_BOOTSTRAP_DB_SSL_ROOT_CERT | Path to the PEM encoded root certificate file                           |                       |
-| MF_BOOTSTRAP_CLIENT_TLS       | Flag that indicates if TLS should be turned on                          | false                 |
-| MF_BOOTSTRAP_CA_CERTS         | Path to trusted CAs in PEM format                                       |                       |
-| MF_BOOTSTRAP_PORT             | Bootstrap service HTTP port                                             | 8180                  |
-| MF_BOOTSTRAP_SERVER_CERT      | Path to server certificate in pem format                                |                       |
-| MF_BOOTSTRAP_SERVER_KEY       | Path to server key in pem format                                        |                       |
-| MF_SDK_BASE_URL               | Base url for Mainflux SDK                                               | http://localhost      |
-| MF_SDK_THINGS_PREFIX          | SDK prefix for Things service                                           |                       |
-| MF_USERS_URL                  | Users service URL                                                       | localhost:8181        |
-| MF_THINGS_ES_URL              | Things service event source URL                                         | localhost:6379        |
-| MF_THINGS_ES_PASS             | Things service event source password                                    |                       |
-| MF_THINGS_ES_DB               | Things service event source database                                    | 0                     |
-| MF_BOOTSTRAP_INSTANCE_NAME    | Bootstrap service instance name                                         | bootstrap             |
+| Variable                      | Description                                                             | Default                          |
+|-------------------------------|-------------------------------------------------------------------------|-----------------------           |
+| MF_BOOTSTRAP_LOG_LEVEL        | Log level for Bootstrap (debug, info, warn, error)                      | error                            |
+| MF_BOOTSTRAP_DB_HOST          | Database host address                                                   | localhost                        |
+| MF_BOOTSTRAP_DB_PORT          | Database host port                                                      | 5432                             |
+| MF_BOOTSTRAP_DB_USER          | Database user                                                           | mainflux                         |
+| MF_BOOTSTRAP_DB_PASS          | Database password                                                       | mainflux                         |
+| MF_BOOTSTRAP_DB               | Name of the database used by the service                                | bootstrap                        |
+| MF_BOOTSTRAP_DB_SSL_MODE      | Database connection SSL mode (disable, require, verify-ca, verify-full) | disable                          |
+| MF_BOOTSTRAP_DB_SSL_CERT      | Path to the PEM encoded certificate file                                |                                  |
+| MF_BOOTSTRAP_DB_SSL_KEY       | Path to the PEM encoded key file                                        |                                  |
+| MF_BOOTSTRAP_DB_SSL_ROOT_CERT | Path to the PEM encoded root certificate file                           |                                  |
+| MF_BOOTSTRAP_ENCRYPT_KEY      | Secret key for secure bootstrapping encryption                          | 12345678910111213141516171819202 |
+| MF_BOOTSTRAP_CLIENT_TLS       | Flag that indicates if TLS should be turned on                          | false                            |
+| MF_BOOTSTRAP_CA_CERTS         | Path to trusted CAs in PEM format                                       |                                  |
+| MF_BOOTSTRAP_PORT             | Bootstrap service HTTP port                                             | 8180                             |
+| MF_BOOTSTRAP_SERVER_CERT      | Path to server certificate in pem format                                |                                  |
+| MF_BOOTSTRAP_SERVER_KEY       | Path to server key in pem format                                        |                                  |
+| MF_SDK_BASE_URL               | Base url for Mainflux SDK                                               | http://localhost                 |
+| MF_SDK_THINGS_PREFIX          | SDK prefix for Things service                                           |                                  |
+| MF_THINGS_ES_URL              | Things service event source URL                                         | localhost:6379                   |
+| MF_THINGS_ES_PASS             | Things service event source password                                    |                                  |
+| MF_THINGS_ES_DB               | Things service event source database                                    | 0                                |
+| MF_BOOTSTRAP_ES_URL           | Bootstrap service event source URL                                      | localhost:6379                   |
+| MF_BOOTSTRAP_ES_PASS          | Bootstrap service event source password                                 |                                  |
+| MF_BOOTSTRAP_ES_DB            | Bootstrap service event source database                                 | 0                                |
+| MF_BOOTSTRAP_EVENT_CONSUMER   | Bootstrap service event source consumer name                            | bootstrap                        |
+| MF_JAEGER_URL                 | Jaeger server URL                                                       | localhost:6831                   |
+| MF_AUTHN_GRPC_URL             | AuthN service gRPC URL                                                  | localhost:8181                   |
+| MF_AUTHN_GRPC_TIMEOUT         | AuthN service gRPC request timeout in seconds                           | 1s                                |
 
 ## Deployment
 
@@ -83,6 +93,7 @@ version: "2"
       MF_BOOTSTRAP_DB_SSL_CERT: [Path to the PEM encoded certificate file]
       MF_BOOTSTRAP_DB_SSL_KEY: [Path to the PEM encoded key file]
       MF_BOOTSTRAP_DB_SSL_ROOT_CERT: [Path to the PEM encoded root certificate file]
+      MF_BOOTSTRAP_ENCRYPT_KEY: [Hex-encoded encryption key used for secure bootstrap]
       MF_BOOTSTRAP_CLIENT_TLS: [Boolean value to enable/disable client TLS]
       MF_BOOTSTRAP_CA_CERTS: [Path to trusted CAs in PEM format]
       MF_BOOTSTRAP_PORT: 8200
@@ -90,20 +101,25 @@ version: "2"
       MF_BOOTSTRAP_SERVER_KEY: [String path to server key in pem format]
       MF_SDK_BASE_URL: [Base SDK URL for the Mainflux services]
       MF_SDK_THINGS_PREFIX: [SDK prefix for Things service]
-      MF_USERS_URL: [Users service URL]
-      MF_THINGS_ES_URL: [Things service event source URL] 
+      MF_THINGS_ES_URL: [Things service event source URL]
       MF_THINGS_ES_PASS: [Things service event source password]
       MF_THINGS_ES_DB: [Things service event source database]
-      MF_BOOTSTRAP_INSTANCE_NAME: [Bootstrap service instance name]
-```      
+      MF_BOOTSTRAP_ES_URL: [Bootstrap service event source URL]
+      MF_BOOTSTRAP_ES_PASS: [Bootstrap service event source password]
+      MF_BOOTSTRAP_ES_DB: [Bootstrap service event source database]
+      MF_BOOTSTRAP_EVENT_CONSUMER: [Bootstrap service event source consumer name]
+      MF_JAEGER_URL: [Jaeger server URL]
+      MF_AUTHN_GRPC_URL: [AuthN service gRPC URL]
+      MF_AUTHN_GRPC_TIMEOUT: [AuthN service gRPC request timeout in seconds]
+```
 
 To start the service outside of the container, execute the following shell script:
 
 ```bash
 # download the latest version of the service
-go get github.com/mainflux/mainflux
+git clone https://github.com/mainflux/mainflux
 
-cd $GOPATH/src/github.com/mainflux/mainflux
+cd mainflux
 
 # compile the service
 make bootstrap
@@ -112,7 +128,28 @@ make bootstrap
 make install
 
 # set the environment variables and run the service
-MF_BOOTSTRAP_LOG_LEVEL=[Bootstrap log level] MF_BOOTSTRAP_DB_HOST=[Database host address] MF_BOOTSTRAP_DB_PORT=[Database host port] MF_BOOTSTRAP_DB_USER=[Database user] MF_BOOTSTRAP_DB_PASS=[Database password] MF_BOOTSTRAP_DB=[Name of the database used by the service] MF_BOOTSTRAP_DB_SSL_MODE=[SSL mode to connect to the database with] MF_BOOTSTRAP_DB_SSL_CERT=[Path to the PEM encoded certificate file] MF_BOOTSTRAP_DB_SSL_KEY=[Path to the PEM encoded key file] MF_BOOTSTRAP_DB_SSL_ROOT_CERT=[Path to the PEM encoded root certificate file] MF_BOOTSTRAP_CLIENT_TLS=[Boolean value to enable/disable client TLS] MF_BOOTSTRAP_CA_CERTS=[Path to trusted CAs in PEM format] MF_BOOTSTRAP_PORT=[Service HTTP port] MF_BOOTSTRAP_SERVER_CERT=[Path to server certificate] MF_BOOTSTRAP_SERVER_KEY=[Path to server key] MF_SDK_BASE_URL=[Base SDK URL for the Mainflux services] MF_SDK_THINGS_PREFIX=[SDK prefix for Things service] MF_USERS_URL=[Users service URL] $GOBIN/mainflux-bootstrap
+MF_BOOTSTRAP_LOG_LEVEL=[Bootstrap log level] \
+MF_BOOTSTRAP_DB_HOST=[Database host address] \
+MF_BOOTSTRAP_DB_PORT=[Database host port] \
+MF_BOOTSTRAP_DB_USER=[Database user] \
+MF_BOOTSTRAP_DB_PASS=[Database password] \
+MF_BOOTSTRAP_DB=[Name of the database used by the service] \
+MF_BOOTSTRAP_DB_SSL_MODE=[SSL mode to connect to the database with] \
+MF_BOOTSTRAP_DB_SSL_CERT=[Path to the PEM encoded certificate file] \
+MF_BOOTSTRAP_DB_SSL_KEY=[Path to the PEM encoded key file] \
+MF_BOOTSTRAP_DB_SSL_ROOT_CERT=[Path to the PEM encoded root certificate file] \
+MF_BOOTSTRAP_ENCRYPT_KEY=[Hex-encoded encryption key used for secure bootstrap] \
+MF_BOOTSTRAP_CLIENT_TLS=[Boolean value to enable/disable client TLS] \
+MF_BOOTSTRAP_CA_CERTS=[Path to trusted CAs in PEM format] \
+MF_BOOTSTRAP_PORT=[Service HTTP port] \
+MF_BOOTSTRAP_SERVER_CERT=[Path to server certificate] \
+MF_BOOTSTRAP_SERVER_KEY=[Path to server key] \
+MF_SDK_BASE_URL=[Base SDK URL for the Mainflux services] \
+MF_SDK_THINGS_PREFIX=[SDK prefix for Things service] \
+MF_JAEGER_URL=[Jaeger server URL] \
+MF_AUTHN_GRPC_URL=[AuthN service gRPC URL] \
+MF_AUTHN_GRPC_TIMEOUT=[AuthN service gRPC request timeout in seconds] \
+$GOBIN/mainflux-bootstrap
 ```
 
 Setting `MF_BOOTSTRAP_CA_CERTS` expects a file in PEM format of trusted CAs. This will enable TLS against the Users gRPC endpoint trusting only those CAs that are provided.

bootstrap/api/doc.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
-// Package api contains implementation of things service HTTP API.
+// Package api contains implementation of bootstrap service HTTP API.
 package api

bootstrap/api/endpoint.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package api
 
@@ -32,10 +28,13 @@ func addEndpoint(svc bootstrap.Service) endpoint.Endpoint {
 			ExternalKey: req.ExternalKey,
 			MFChannels:  channels,
 			Name:        req.Name,
+			ClientCert:  req.ClientCert,
+			ClientKey:   req.ClientKey,
+			CACert:      req.CACert,
 			Content:     req.Content,
 		}
 
-		saved, err := svc.Add(req.key, config)
+		saved, err := svc.Add(req.token, config)
 		if err != nil {
 			return nil, err
 		}
@@ -49,6 +48,23 @@ func addEndpoint(svc bootstrap.Service) endpoint.Endpoint {
 	}
 }
 
+func updateCertEndpoint(svc bootstrap.Service) endpoint.Endpoint {
+	return func(_ context.Context, request interface{}) (interface{}, error) {
+		req := request.(updateCertReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		if err := svc.UpdateCert(req.key, req.thingID, req.ClientCert, req.ClientKey, req.CACert); err != nil {
+			return nil, err
+		}
+
+		res := configRes{}
+
+		return res, nil
+	}
+}
+
 func viewEndpoint(svc bootstrap.Service) endpoint.Endpoint {
 	return func(_ context.Context, request interface{}) (interface{}, error) {
 		req := request.(entityReq)
@@ -146,49 +162,37 @@ func listEndpoint(svc bootstrap.Service) endpoint.Endpoint {
 		if err != nil {
 			return nil, err
 		}
-		switch {
-		case req.filter.Unknown:
-			res := listUnknownRes{}
-			for _, cfg := range page.Configs {
-				res.Configs = append(res.Configs, unknownRes{
-					ExternalID:  cfg.ExternalID,
-					ExternalKey: cfg.ExternalKey,
+		res := listRes{
+			Total:   page.Total,
+			Offset:  page.Offset,
+			Limit:   page.Limit,
+			Configs: []viewRes{},
+		}
+
+		for _, cfg := range page.Configs {
+			var channels []channelRes
+			for _, ch := range cfg.MFChannels {
+				channels = append(channels, channelRes{
+					ID:       ch.ID,
+					Name:     ch.Name,
+					Metadata: ch.Metadata,
 				})
 			}
-			return res, nil
-		default:
-			res := listRes{
-				Total:   page.Total,
-				Offset:  page.Offset,
-				Limit:   page.Limit,
-				Configs: []viewRes{},
+
+			view := viewRes{
+				MFThing:     cfg.MFThing,
+				MFKey:       cfg.MFKey,
+				Channels:    channels,
+				ExternalID:  cfg.ExternalID,
+				ExternalKey: cfg.ExternalKey,
+				Name:        cfg.Name,
+				Content:     cfg.Content,
+				State:       cfg.State,
 			}
-
-			for _, cfg := range page.Configs {
-				var channels []channelRes
-				for _, ch := range cfg.MFChannels {
-					channels = append(channels, channelRes{
-						ID:       ch.ID,
-						Name:     ch.Name,
-						Metadata: ch.Metadata,
-					})
-				}
-
-				view := viewRes{
-					MFThing:     cfg.MFThing,
-					MFKey:       cfg.MFKey,
-					Channels:    channels,
-					ExternalID:  cfg.ExternalID,
-					ExternalKey: cfg.ExternalKey,
-					Name:        cfg.Name,
-					Content:     cfg.Content,
-					State:       cfg.State,
-				}
-				res.Configs = append(res.Configs, view)
-			}
-
-			return res, nil
+			res.Configs = append(res.Configs, view)
 		}
+
+		return res, nil
 	}
 }
 
@@ -208,19 +212,19 @@ func removeEndpoint(svc bootstrap.Service) endpoint.Endpoint {
 	}
 }
 
-func bootstrapEndpoint(svc bootstrap.Service, reader bootstrap.ConfigReader) endpoint.Endpoint {
+func bootstrapEndpoint(svc bootstrap.Service, reader bootstrap.ConfigReader, secure bool) endpoint.Endpoint {
 	return func(_ context.Context, request interface{}) (interface{}, error) {
 		req := request.(bootstrapReq)
 		if err := req.validate(); err != nil {
 			return nil, err
 		}
 
-		cfg, err := svc.Bootstrap(req.key, req.id)
+		cfg, err := svc.Bootstrap(req.key, req.id, secure)
 		if err != nil {
 			return nil, err
 		}
 
-		return reader.ReadConfig(cfg)
+		return reader.ReadConfig(cfg, secure)
 	}
 }
 

bootstrap/api/endpoint_test.go

@@ -1,13 +1,13 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package api_test
 
 import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -22,9 +22,10 @@ import (
 	"github.com/mainflux/mainflux/bootstrap"
 	bsapi "github.com/mainflux/mainflux/bootstrap/api"
 	"github.com/mainflux/mainflux/bootstrap/mocks"
-	mfsdk "github.com/mainflux/mainflux/sdk/go"
+	mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
 	"github.com/mainflux/mainflux/things"
-	thingsapi "github.com/mainflux/mainflux/things/api/http"
+	thingsapi "github.com/mainflux/mainflux/things/api/things/http"
+	"github.com/opentracing/opentracing-go/mocktracer"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -37,7 +38,6 @@ const (
 	channelsNum    = 3
 	contentType    = "application/json"
 	wrongID        = "wrong_id"
-	metadata       = `{"meta": "data"}`
 	addExternalID  = "external-id"
 	addExternalKey = "external-key"
 	addName        = "name"
@@ -45,7 +45,9 @@ const (
 )
 
 var (
+	encKey      = []byte("1234567891011121")
 	addChannels = []string{"1"}
+	metadata    = map[string]interface{}{"meta": "data"}
 	addReq      = struct {
 		ThingID     string   `json:"thing_id"`
 		ExternalID  string   `json:"external_id"`
@@ -62,14 +64,26 @@ var (
 	}
 
 	updateReq = struct {
-		Channels []string        `json:"channels"`
-		Content  string          `json:"content"`
-		State    bootstrap.State `json:"state"`
+		Channels   []string        `json:"channels,omitempty"`
+		Content    string          `json:"content,omitempty"`
+		State      bootstrap.State `json:"state,omitempty"`
+		ClientCert string          `json:"client_cert,omitempty"`
+		ClientKey  string          `json:"client_key,omitempty"`
+		CACert     string          `json:"ca_cert,omitempty"`
 	}{
-		Channels: []string{"2", "3"},
-		Content:  "config update",
-		State:    1,
+		Channels:   []string{"2", "3"},
+		Content:    "config update",
+		State:      1,
+		ClientCert: "newcert",
+		ClientKey:  "newkey",
+		CACert:     "newca",
 	}
+
+	bsErrorRes           = toJSON(errorRes{bootstrap.ErrBootstrap.Error()})
+	unauthRes            = toJSON(errorRes{bootstrap.ErrUnauthorizedAccess.Error()})
+	malformedRes         = toJSON(errorRes{bootstrap.ErrMalformedEntity.Error()})
+	extKeyNotFoundRes    = toJSON(errorRes{bootstrap.ErrExternalKeyNotFound.Error()})
+	extSecKeyNotFoundRes = toJSON(errorRes{bootstrap.ErrSecureBootstrap.Error()})
 )
 
 type testRequest struct {
@@ -88,6 +102,9 @@ func newConfig(channels []bootstrap.Channel) bootstrap.Config {
 		MFChannels:  channels,
 		Name:        addName,
 		Content:     addContent,
+		ClientCert:  "newcert",
+		ClientKey:   "newkey",
+		CACert:      "newca",
 	}
 }
 
@@ -109,14 +126,44 @@ func (tr testRequest) make() (*http.Response, error) {
 	return tr.client.Do(req)
 }
 
-func newService(users mainflux.UsersServiceClient, unknown map[string]string, url string) bootstrap.Service {
-	things := mocks.NewConfigsRepository(unknown)
+func enc(in []byte) ([]byte, error) {
+	block, err := aes.NewCipher(encKey)
+	if err != nil {
+		return nil, err
+	}
+	ciphertext := make([]byte, aes.BlockSize+len(in))
+	iv := ciphertext[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		return nil, err
+	}
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(ciphertext[aes.BlockSize:], in)
+	return ciphertext, nil
+}
+
+func dec(in []byte) ([]byte, error) {
+	block, err := aes.NewCipher(encKey)
+	if err != nil {
+		return nil, err
+	}
+	if len(in) < aes.BlockSize {
+		return nil, bootstrap.ErrMalformedEntity
+	}
+	iv := in[:aes.BlockSize]
+	in = in[aes.BlockSize:]
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(in, in)
+	return in, nil
+}
+
+func newService(authn mainflux.AuthNServiceClient, url string) bootstrap.Service {
+	things := mocks.NewConfigsRepository()
 	config := mfsdk.Config{
 		BaseURL: url,
 	}
 
 	sdk := mfsdk.NewSDK(config)
-	return bootstrap.New(users, things, sdk)
+	return bootstrap.New(authn, things, sdk, encKey)
 }
 
 func generateChannels() map[string]things.Channel {
@@ -132,17 +179,17 @@ func generateChannels() map[string]things.Channel {
 	return channels
 }
 
-func newThingsService(users mainflux.UsersServiceClient) things.Service {
-	return mocks.NewThingsService(map[string]things.Thing{}, generateChannels(), users)
+func newThingsService(authn mainflux.AuthNServiceClient) things.Service {
+	return mocks.NewThingsService(map[string]things.Thing{}, generateChannels(), authn)
 }
 
 func newThingsServer(svc things.Service) *httptest.Server {
-	mux := thingsapi.MakeHandler(svc)
+	mux := thingsapi.MakeHandler(mocktracer.New(), svc)
 	return httptest.NewServer(mux)
 }
 
 func newBootstrapServer(svc bootstrap.Service) *httptest.Server {
-	mux := bsapi.MakeHandler(svc, bootstrap.NewConfigReader())
+	mux := bsapi.MakeHandler(svc, bootstrap.NewConfigReader(encKey))
 	return httptest.NewServer(mux)
 }
 
@@ -155,7 +202,7 @@ func TestAdd(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	data := toJSON(addReq)
@@ -279,7 +326,7 @@ func TestView(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 	c := newConfig([]bootstrap.Channel{})
 
@@ -288,7 +335,7 @@ func TestView(t *testing.T) {
 		c.MFChannels = append(c.MFChannels, bootstrap.Channel{
 			ID:       ch.ID,
 			Name:     fmt.Sprintf("%s%s", "name ", id),
-			Metadata: fmt.Sprintf("{\"type\":\"some type %s\"}", id),
+			Metadata: map[string]interface{}{"type": fmt.Sprintf("some type %s", id)},
 		})
 	}
 
@@ -361,7 +408,7 @@ func TestView(t *testing.T) {
 		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
 		var view config
 		if err := json.NewDecoder(res.Body).Decode(&view); err != io.EOF {
-			assert.Nil(t, err, fmt.Sprintf("Decoding expeceted to succeed %s: %s", tc.desc, err))
+			assert.Nil(t, err, fmt.Sprintf("Decoding expected to succeed %s: %s", tc.desc, err))
 		}
 
 		assert.ElementsMatch(t, tc.res.Channels, view.Channels, fmt.Sprintf("%s: expected response '%s' got '%s'", tc.desc, tc.res.Channels, view.Channels))
@@ -376,7 +423,7 @@ func TestUpdate(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
@@ -466,12 +513,106 @@ func TestUpdate(t *testing.T) {
 		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
 	}
 }
+func TestUpdateCert(t *testing.T) {
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+
+	ts := newThingsServer(newThingsService(users))
+	svc := newService(users, ts.URL)
+	bs := newBootstrapServer(svc)
+
+	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
+
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	data := toJSON(updateReq)
+
+	cases := []struct {
+		desc        string
+		req         string
+		id          string
+		auth        string
+		contentType string
+		status      int
+	}{
+		{
+			desc:        "update unauthorized",
+			req:         data,
+			id:          saved.MFThing,
+			auth:        invalidToken,
+			contentType: contentType,
+			status:      http.StatusForbidden,
+		},
+		{
+			desc:        "update with an empty token",
+			req:         data,
+			id:          saved.MFThing,
+			auth:        "",
+			contentType: contentType,
+			status:      http.StatusForbidden,
+		},
+		{
+			desc:        "update a valid config",
+			req:         data,
+			id:          saved.MFThing,
+			auth:        validToken,
+			contentType: contentType,
+			status:      http.StatusOK,
+		},
+		{
+			desc:        "update a config with wrong content type",
+			req:         data,
+			id:          saved.MFThing,
+			auth:        validToken,
+			contentType: "",
+			status:      http.StatusUnsupportedMediaType,
+		},
+		{
+			desc:        "update a non-existing config",
+			req:         data,
+			id:          wrongID,
+			auth:        validToken,
+			contentType: contentType,
+			status:      http.StatusNotFound,
+		},
+		{
+			desc:        "update a config with invalid request format",
+			req:         "}",
+			id:          saved.MFKey,
+			auth:        validToken,
+			contentType: contentType,
+			status:      http.StatusBadRequest,
+		},
+		{
+			desc:        "update a config with an empty request",
+			id:          saved.MFThing,
+			req:         "",
+			auth:        validToken,
+			contentType: contentType,
+			status:      http.StatusBadRequest,
+		},
+	}
+
+	for _, tc := range cases {
+		req := testRequest{
+			client:      bs.Client(),
+			method:      http.MethodPatch,
+			url:         fmt.Sprintf("%s/things/configs/certs/%s", bs.URL, tc.id),
+			contentType: tc.contentType,
+			token:       tc.auth,
+			body:        strings.NewReader(tc.req),
+		}
+		res, err := req.make()
+		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
+		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
+	}
+}
 
 func TestUpdateConnections(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
@@ -583,7 +724,7 @@ func TestList(t *testing.T) {
 
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 	path := fmt.Sprintf("%s/%s", bs.URL, "things/configs")
 
@@ -832,7 +973,7 @@ func TestRemove(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
@@ -890,108 +1031,11 @@ func TestRemove(t *testing.T) {
 	}
 }
 
-func TestListUnknown(t *testing.T) {
-	unknownNum := 10
-	unknown := make([]config, unknownNum)
-	unknownConfigs := make(map[string]string, unknownNum)
-	// Save some unknown elements.
-	for i := 0; i < unknownNum; i++ {
-		u := config{
-			ExternalID:  fmt.Sprintf("key-%s", strconv.Itoa(i)),
-			ExternalKey: fmt.Sprintf("%s%s", addExternalKey, strconv.Itoa(i)),
-		}
-		unknownConfigs[u.ExternalID] = u.ExternalKey
-		unknown[i] = u
-	}
-
-	users := mocks.NewUsersService(map[string]string{validToken: email})
-	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, unknownConfigs, ts.URL)
-	bs := newBootstrapServer(svc)
-	path := fmt.Sprintf("%s/%s", bs.URL, "things/unknown/configs")
-
-	cases := []struct {
-		desc   string
-		auth   string
-		url    string
-		status int
-		res    []config
-	}{
-		{
-			desc:   "view unknown unauthorized",
-			auth:   invalidToken,
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d", path, 0, 5),
-			status: http.StatusForbidden,
-			res:    nil,
-		},
-		{
-			desc:   "view unknown with an empty token",
-			auth:   "",
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d", path, 0, 5),
-			status: http.StatusForbidden,
-			res:    nil,
-		},
-		{
-			desc:   "view unknown with limit < 0",
-			auth:   validToken,
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d", path, 0, -5),
-			status: http.StatusBadRequest,
-			res:    nil,
-		},
-		{
-			desc:   "view unknown with offset < 0",
-			auth:   validToken,
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d", path, -3, 5),
-			status: http.StatusBadRequest,
-			res:    nil,
-		},
-		{
-			desc:   "view unknown with invalid query params",
-			auth:   validToken,
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d&key=%%", path, 0, -5),
-			status: http.StatusBadRequest,
-			res:    nil,
-		},
-		{
-			desc:   "view a list of unknown",
-			auth:   validToken,
-			url:    fmt.Sprintf("%s?offset=%d&limit=%d", path, 0, 5),
-			status: http.StatusOK,
-			res:    unknown[:5],
-		},
-		{
-			desc:   "view unknown with no page paremeters",
-			auth:   validToken,
-			url:    fmt.Sprintf("%s", path),
-			status: http.StatusOK,
-			res:    unknown[:10],
-		},
-	}
-
-	for _, tc := range cases {
-		req := testRequest{
-			client: bs.Client(),
-			method: http.MethodGet,
-			url:    tc.url,
-			token:  tc.auth,
-		}
-		res, err := req.make()
-		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
-
-		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
-		var body map[string][]config
-
-		json.NewDecoder(res.Body).Decode(&body)
-		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
-		assert.ElementsMatch(t, tc.res, body["configs"], fmt.Sprintf("%s: expected response '%s' got '%s'", tc.desc, tc.res, body["configs"]))
-	}
-}
-
 func TestBootstrap(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, map[string]string{}, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
@@ -999,6 +1043,9 @@ func TestBootstrap(t *testing.T) {
 	saved, err := svc.Add(validToken, c)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
+	encExternKey, err := enc([]byte(c.ExternalKey))
+	require.Nil(t, err, fmt.Sprintf("Encrypting config expected to succeed: %s.\n", err))
+
 	var channels []channel
 	for _, ch := range saved.MFChannels {
 		channels = append(channels, channel{ID: ch.ID, Name: ch.Name, Metadata: ch.Metadata})
@@ -1009,56 +1056,84 @@ func TestBootstrap(t *testing.T) {
 		MFKey      string    `json:"mainflux_key"`
 		MFChannels []channel `json:"mainflux_channels"`
 		Content    string    `json:"content"`
+		ClientCert string    `json:"client_cert"`
+		ClientKey  string    `json:"client_key"`
+		CACert     string    `json:"ca_cert"`
 	}{
 		MFThing:    saved.MFThing,
 		MFKey:      saved.MFKey,
 		MFChannels: channels,
 		Content:    saved.Content,
+		ClientCert: saved.ClientCert,
+		ClientKey:  saved.ClientKey,
+		CACert:     saved.CACert,
 	}
 
 	data := toJSON(s)
 
 	cases := []struct {
-		desc         string
-		external_id  string
-		external_key string
-		status       int
-		res          string
+		desc        string
+		externalID  string
+		externalKey string
+		status      int
+		res         string
+		secure      bool
 	}{
 		{
-			desc:         "bootstrap a Thing with unknown ID",
-			external_id:  unknown,
-			external_key: c.ExternalKey,
-			status:       http.StatusNotFound,
-			res:          "",
+			desc:        "bootstrap a Thing with unknown ID",
+			externalID:  unknown,
+			externalKey: c.ExternalKey,
+			status:      http.StatusNotFound,
+			res:         bsErrorRes,
+			secure:      false,
 		},
 		{
-			desc:         "bootstrap a Thing with an empty ID",
-			external_id:  "",
-			external_key: c.ExternalKey,
-			status:       http.StatusBadRequest,
-			res:          "",
+			desc:        "bootstrap a Thing with an empty ID",
+			externalID:  "",
+			externalKey: c.ExternalKey,
+			status:      http.StatusBadRequest,
+			res:         malformedRes,
+			secure:      false,
 		},
 		{
-			desc:         "bootstrap a Thing with unknown key",
-			external_id:  c.ExternalID,
-			external_key: unknown,
-			status:       http.StatusNotFound,
-			res:          "",
+			desc:        "bootstrap a Thing with unknown key",
+			externalID:  c.ExternalID,
+			externalKey: unknown,
+			status:      http.StatusNotFound,
+			res:         extKeyNotFoundRes,
+			secure:      false,
 		},
 		{
-			desc:         "bootstrap a Thing with an empty key",
-			external_id:  c.ExternalID,
-			external_key: "",
-			status:       http.StatusForbidden,
-			res:          "",
+			desc:        "bootstrap a Thing with an empty key",
+			externalID:  c.ExternalID,
+			externalKey: "",
+			status:      http.StatusForbidden,
+			res:         unauthRes,
+			secure:      false,
 		},
 		{
-			desc:         "bootstrap known Thing",
-			external_id:  c.ExternalID,
-			external_key: c.ExternalKey,
-			status:       http.StatusOK,
-			res:          data,
+			desc:        "bootstrap known Thing",
+			externalID:  c.ExternalID,
+			externalKey: c.ExternalKey,
+			status:      http.StatusOK,
+			res:         data,
+			secure:      false,
+		},
+		{
+			desc:        "bootstrap secure",
+			externalID:  fmt.Sprintf("secure/%s", c.ExternalID),
+			externalKey: hex.EncodeToString(encExternKey),
+			status:      http.StatusOK,
+			res:         data,
+			secure:      true,
+		},
+		{
+			desc:        "bootstrap secure with unencrypted key",
+			externalID:  fmt.Sprintf("secure/%s", c.ExternalID),
+			externalKey: c.ExternalKey,
+			status:      http.StatusNotFound,
+			res:         extSecKeyNotFoundRes,
+			secure:      true,
 		},
 	}
 
@@ -1066,8 +1141,8 @@ func TestBootstrap(t *testing.T) {
 		req := testRequest{
 			client: bs.Client(),
 			method: http.MethodGet,
-			url:    fmt.Sprintf("%s/things/bootstrap/%s", bs.URL, tc.external_id),
-			token:  tc.external_key,
+			url:    fmt.Sprintf("%s/things/bootstrap/%s", bs.URL, tc.externalID),
+			token:  tc.externalKey,
 		}
 		res, err := req.make()
 		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
@@ -1075,6 +1150,9 @@ func TestBootstrap(t *testing.T) {
 		assert.Equal(t, tc.status, res.StatusCode, fmt.Sprintf("%s: expected status code %d got %d", tc.desc, tc.status, res.StatusCode))
 		body, err := ioutil.ReadAll(res.Body)
 		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error %s", tc.desc, err))
+		if tc.secure && tc.status == http.StatusOK {
+			body, err = dec(body)
+		}
 
 		data := strings.Trim(string(body), "\n")
 		assert.Equal(t, tc.res, data, fmt.Sprintf("%s: expected response '%s' got '%s'", tc.desc, tc.res, data))
@@ -1085,7 +1163,7 @@ func TestChangeState(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
 	ts := newThingsServer(newThingsService(users))
-	svc := newService(users, nil, ts.URL)
+	svc := newService(users, ts.URL)
 	bs := newBootstrapServer(svc)
 
 	c := newConfig([]bootstrap.Channel{bootstrap.Channel{ID: "1"}})
@@ -1208,3 +1286,7 @@ type configPage struct {
 	Limit   uint64   `json:"limit"`
 	Configs []config `json:"configs"`
 }
+
+type errorRes struct {
+	Err string `json:"error"`
+}

bootstrap/api/logging.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 // +build !test
 
@@ -29,9 +25,9 @@ func NewLoggingMiddleware(svc bootstrap.Service, logger log.Logger) bootstrap.Se
 	return &loggingMiddleware{logger, svc}
 }
 
-func (lm *loggingMiddleware) Add(key string, thing bootstrap.Config) (saved bootstrap.Config, err error) {
+func (lm *loggingMiddleware) Add(token string, cfg bootstrap.Config) (saved bootstrap.Config, err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method add for key %s and thing %s took %s to complete", key, saved.MFThing, time.Since(begin))
+		message := fmt.Sprintf("Method add for token %s and thing %s took %s to complete", token, saved.MFThing, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -39,12 +35,12 @@ func (lm *loggingMiddleware) Add(key string, thing bootstrap.Config) (saved boot
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.Add(key, thing)
+	return lm.svc.Add(token, cfg)
 }
 
-func (lm *loggingMiddleware) View(key, id string) (saved bootstrap.Config, err error) {
+func (lm *loggingMiddleware) View(token, id string) (saved bootstrap.Config, err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method view for key %s and thing %s took %s to complete", key, saved.MFThing, time.Since(begin))
+		message := fmt.Sprintf("Method view for token %s and thing %s took %s to complete", token, saved.MFThing, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -52,12 +48,12 @@ func (lm *loggingMiddleware) View(key, id string) (saved bootstrap.Config, err e
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.View(key, id)
+	return lm.svc.View(token, id)
 }
 
-func (lm *loggingMiddleware) Update(key string, thing bootstrap.Config) (err error) {
+func (lm *loggingMiddleware) Update(token string, cfg bootstrap.Config) (err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method update for key %s and thing %s took %s to complete", key, thing.MFThing, time.Since(begin))
+		message := fmt.Sprintf("Method update for token %s and thing %s took %s to complete", token, cfg.MFThing, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -65,12 +61,12 @@ func (lm *loggingMiddleware) Update(key string, thing bootstrap.Config) (err err
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.Update(key, thing)
+	return lm.svc.Update(token, cfg)
 }
 
-func (lm *loggingMiddleware) UpdateConnections(key, id string, connections []string) (err error) {
+func (lm *loggingMiddleware) UpdateCert(token, thingID, clientCert, clientKey, caCert string) (err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method update_connections for key %s and thing %s took %s to complete", key, id, time.Since(begin))
+		message := fmt.Sprintf("Method update_cert for thing with id %s took %s to complete", thingID, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -78,12 +74,12 @@ func (lm *loggingMiddleware) UpdateConnections(key, id string, connections []str
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.UpdateConnections(key, id, connections)
+	return lm.svc.UpdateCert(token, thingID, clientCert, clientKey, caCert)
 }
 
-func (lm *loggingMiddleware) List(key string, filter bootstrap.Filter, offset, limit uint64) (res bootstrap.ConfigsPage, err error) {
+func (lm *loggingMiddleware) UpdateConnections(token, id string, connections []string) (err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method list for key %s and offset %d and limit %d took %s to complete", key, offset, limit, time.Since(begin))
+		message := fmt.Sprintf("Method update_connections for token %s and thing %s took %s to complete", token, id, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -91,12 +87,12 @@ func (lm *loggingMiddleware) List(key string, filter bootstrap.Filter, offset, l
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.List(key, filter, offset, limit)
+	return lm.svc.UpdateConnections(token, id, connections)
 }
 
-func (lm *loggingMiddleware) Remove(key, id string) (err error) {
+func (lm *loggingMiddleware) List(token string, filter bootstrap.Filter, offset, limit uint64) (res bootstrap.ConfigsPage, err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method remove for key %s and thing %s took %s to complete", key, id, time.Since(begin))
+		message := fmt.Sprintf("Method list for token %s and offset %d and limit %d took %s to complete", token, offset, limit, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -104,10 +100,23 @@ func (lm *loggingMiddleware) Remove(key, id string) (err error) {
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.Remove(key, id)
+	return lm.svc.List(token, filter, offset, limit)
 }
 
-func (lm *loggingMiddleware) Bootstrap(externalKey, externalID string) (cfg bootstrap.Config, err error) {
+func (lm *loggingMiddleware) Remove(token, id string) (err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method remove for token %s and thing %s took %s to complete", token, id, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.Remove(token, id)
+}
+
+func (lm *loggingMiddleware) Bootstrap(externalKey, externalID string, secure bool) (cfg bootstrap.Config, err error) {
 	defer func(begin time.Time) {
 		message := fmt.Sprintf("Method bootstrap for thing with external id %s took %s to complete", externalID, time.Since(begin))
 		if err != nil {
@@ -117,12 +126,12 @@ func (lm *loggingMiddleware) Bootstrap(externalKey, externalID string) (cfg boot
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.Bootstrap(externalKey, externalID)
+	return lm.svc.Bootstrap(externalKey, externalID, secure)
 }
 
-func (lm *loggingMiddleware) ChangeState(key, id string, state bootstrap.State) (err error) {
+func (lm *loggingMiddleware) ChangeState(token, id string, state bootstrap.State) (err error) {
 	defer func(begin time.Time) {
-		message := fmt.Sprintf("Method change_state for key %s and thing %s took %s to complete", key, id, time.Since(begin))
+		message := fmt.Sprintf("Method change_state for token %s and thing %s took %s to complete", token, id, time.Since(begin))
 		if err != nil {
 			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
 			return
@@ -130,7 +139,7 @@ func (lm *loggingMiddleware) ChangeState(key, id string, state bootstrap.State)
 		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
 	}(time.Now())
 
-	return lm.svc.ChangeState(key, id, state)
+	return lm.svc.ChangeState(token, id, state)
 }
 
 func (lm *loggingMiddleware) UpdateChannelHandler(channel bootstrap.Channel) (err error) {

bootstrap/api/metrics.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 // +build !test
 
@@ -34,76 +30,85 @@ func MetricsMiddleware(svc bootstrap.Service, counter metrics.Counter, latency m
 	}
 }
 
-func (mm *metricsMiddleware) Add(key string, thing bootstrap.Config) (saved bootstrap.Config, err error) {
+func (mm *metricsMiddleware) Add(token string, cfg bootstrap.Config) (saved bootstrap.Config, err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "add").Add(1)
 		mm.latency.With("method", "add").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.Add(key, thing)
+	return mm.svc.Add(token, cfg)
 }
 
-func (mm *metricsMiddleware) View(id, key string) (saved bootstrap.Config, err error) {
+func (mm *metricsMiddleware) View(token, id string) (saved bootstrap.Config, err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "view").Add(1)
 		mm.latency.With("method", "view").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.View(id, key)
+	return mm.svc.View(token, id)
 }
 
-func (mm *metricsMiddleware) Update(key string, thing bootstrap.Config) (err error) {
+func (mm *metricsMiddleware) Update(token string, cfg bootstrap.Config) (err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "update").Add(1)
 		mm.latency.With("method", "update").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.Update(key, thing)
+	return mm.svc.Update(token, cfg)
 }
 
-func (mm *metricsMiddleware) UpdateConnections(key, id string, connections []string) (err error) {
+func (mm *metricsMiddleware) UpdateCert(token, thingKey, clientCert, clientKey, caCert string) (err error) {
+	defer func(begin time.Time) {
+		mm.counter.With("method", "update_cert").Add(1)
+		mm.latency.With("method", "update_cert").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return mm.svc.UpdateCert(token, thingKey, clientCert, clientKey, caCert)
+}
+
+func (mm *metricsMiddleware) UpdateConnections(token, id string, connections []string) (err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "update_connections").Add(1)
 		mm.latency.With("method", "update_connections").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.UpdateConnections(key, id, connections)
+	return mm.svc.UpdateConnections(token, id, connections)
 }
 
-func (mm *metricsMiddleware) List(key string, filter bootstrap.Filter, offset, limit uint64) (saved bootstrap.ConfigsPage, err error) {
+func (mm *metricsMiddleware) List(token string, filter bootstrap.Filter, offset, limit uint64) (saved bootstrap.ConfigsPage, err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "list").Add(1)
 		mm.latency.With("method", "list").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.List(key, filter, offset, limit)
+	return mm.svc.List(token, filter, offset, limit)
 }
 
-func (mm *metricsMiddleware) Remove(id, key string) (err error) {
+func (mm *metricsMiddleware) Remove(token, id string) (err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "remove").Add(1)
 		mm.latency.With("method", "remove").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.Remove(id, key)
+	return mm.svc.Remove(token, id)
 }
 
-func (mm *metricsMiddleware) Bootstrap(externalKey, externalID string) (cfg bootstrap.Config, err error) {
+func (mm *metricsMiddleware) Bootstrap(externalKey, externalID string, secure bool) (cfg bootstrap.Config, err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "bootstrap").Add(1)
 		mm.latency.With("method", "bootstrap").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.Bootstrap(externalKey, externalID)
+	return mm.svc.Bootstrap(externalKey, externalID, secure)
 }
 
-func (mm *metricsMiddleware) ChangeState(id, key string, state bootstrap.State) (err error) {
+func (mm *metricsMiddleware) ChangeState(token, id string, state bootstrap.State) (err error) {
 	defer func(begin time.Time) {
 		mm.counter.With("method", "change_state").Add(1)
 		mm.latency.With("method", "change_state").Observe(time.Since(begin).Seconds())
 	}(time.Now())
 
-	return mm.svc.ChangeState(id, key, state)
+	return mm.svc.ChangeState(token, id, state)
 }
 
 func (mm *metricsMiddleware) UpdateChannelHandler(channel bootstrap.Channel) (err error) {

bootstrap/api/requests.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package api
 
@@ -14,17 +10,20 @@ type apiReq interface {
 }
 
 type addReq struct {
-	key         string
+	token       string
 	ThingID     string   `json:"thing_id"`
 	ExternalID  string   `json:"external_id"`
 	ExternalKey string   `json:"external_key"`
 	Channels    []string `json:"channels"`
 	Name        string   `json:"name"`
 	Content     string   `json:"content"`
+	ClientCert  string   `json:"client_cert"`
+	ClientKey   string   `json:"client_key"`
+	CACert      string   `json:"ca_cert"`
 }
 
 func (req addReq) validate() error {
-	if req.key == "" {
+	if req.token == "" {
 		return bootstrap.ErrUnauthorizedAccess
 	}
 
@@ -71,6 +70,26 @@ func (req updateReq) validate() error {
 	return nil
 }
 
+type updateCertReq struct {
+	key        string
+	thingID    string
+	ClientCert string `json:"client_cert"`
+	ClientKey  string `json:"client_key"`
+	CACert     string `json:"ca_cert"`
+}
+
+func (req updateCertReq) validate() error {
+	if req.key == "" {
+		return bootstrap.ErrUnauthorizedAccess
+	}
+
+	if req.thingID == "" {
+		return bootstrap.ErrNotFound
+	}
+
+	return nil
+}
+
 type updateConnReq struct {
 	key      string
 	id       string

bootstrap/api/requests_test.go

@@ -11,28 +11,28 @@ import (
 func TestAddReqValidation(t *testing.T) {
 	cases := []struct {
 		desc        string
-		key         string
+		token       string
 		externalID  string
 		externalKey string
 		err         error
 	}{
 		{
 			desc:        "empty key",
-			key:         "",
+			token:       "",
 			externalID:  "external-id",
 			externalKey: "external-key",
 			err:         bootstrap.ErrUnauthorizedAccess,
 		},
 		{
 			desc:        "empty external ID",
-			key:         "key",
+			token:       "token",
 			externalID:  "",
 			externalKey: "external-key",
 			err:         bootstrap.ErrMalformedEntity,
 		},
 		{
 			desc:        "empty external key",
-			key:         "key",
+			token:       "token",
 			externalID:  "external-id",
 			externalKey: "",
 			err:         bootstrap.ErrMalformedEntity,
@@ -41,7 +41,7 @@ func TestAddReqValidation(t *testing.T) {
 
 	for _, tc := range cases {
 		req := addReq{
-			key:         tc.key,
+			token:       tc.token,
 			ExternalID:  tc.externalID,
 			ExternalKey: tc.externalKey,
 		}
@@ -114,6 +114,38 @@ func TestUpdateReqValidation(t *testing.T) {
 	}
 }
 
+func TestUpdateCertReqValidation(t *testing.T) {
+	cases := []struct {
+		desc    string
+		key     string
+		thingID string
+		err     error
+	}{
+		{
+			desc:    "empty key",
+			key:     "",
+			thingID: "thingID",
+			err:     bootstrap.ErrUnauthorizedAccess,
+		},
+		{
+			desc:    "empty thing key",
+			key:     "key",
+			thingID: "",
+			err:     bootstrap.ErrNotFound,
+		},
+	}
+
+	for _, tc := range cases {
+		req := updateCertReq{
+			key:     tc.key,
+			thingID: tc.thingID,
+		}
+
+		err := req.validate()
+		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+
 func TestUpdateConnReqValidation(t *testing.T) {
 	cases := []struct {
 		desc string

bootstrap/api/responses.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package api
 
@@ -93,27 +89,6 @@ func (res viewRes) Empty() bool {
 	return false
 }
 
-type unknownRes struct {
-	ExternalID  string `json:"external_id"`
-	ExternalKey string `json:"external_key,omitempty"`
-}
-
-type listUnknownRes struct {
-	Configs []unknownRes `json:"configs"`
-}
-
-func (res listUnknownRes) Code() int {
-	return http.StatusOK
-}
-
-func (res listUnknownRes) Headers() map[string]string {
-	return map[string]string{}
-}
-
-func (res listUnknownRes) Empty() bool {
-	return false
-}
-
 type listRes struct {
 	Total   uint64    `json:"total"`
 	Offset  uint64    `json:"offset"`
@@ -146,3 +121,7 @@ func (res stateRes) Headers() map[string]string {
 func (res stateRes) Empty() bool {
 	return true
 }
+
+type errorRes struct {
+	Err string `json:"error"`
+}

bootstrap/api/transport.go

@@ -1,16 +1,11 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package api
 
 import (
 	"context"
 	"encoding/json"
-	"errors"
 	"io"
 	"net/http"
 	"net/url"
@@ -21,6 +16,7 @@ import (
 	"github.com/go-zoo/bone"
 	"github.com/mainflux/mainflux"
 	"github.com/mainflux/mainflux/bootstrap"
+	"github.com/mainflux/mainflux/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
@@ -33,6 +29,8 @@ const (
 var (
 	errUnsupportedContentType = errors.New("unsupported content type")
 	errInvalidQueryParams     = errors.New("invalid query params")
+	errInvalidLimitParam      = errors.New("invalid limit query param")
+	errInvalidOffsetParam     = errors.New("invalid offset query param")
 	fullMatch                 = []string{"state", "external_id", "mainflux_id", "mainflux_key"}
 	partialMatch              = []string{"name"}
 )
@@ -62,6 +60,12 @@ func MakeHandler(svc bootstrap.Service, reader bootstrap.ConfigReader) http.Hand
 		encodeResponse,
 		opts...))
 
+	r.Patch("/things/configs/certs/:id", kithttp.NewServer(
+		updateCertEndpoint(svc),
+		decodeUpdateCertRequest,
+		encodeResponse,
+		opts...))
+
 	r.Put("/things/configs/connections/:id", kithttp.NewServer(
 		updateConnEndpoint(svc),
 		decodeUpdateConnRequest,
@@ -74,16 +78,16 @@ func MakeHandler(svc bootstrap.Service, reader bootstrap.ConfigReader) http.Hand
 		encodeResponse,
 		opts...))
 
-	r.Get("/things/unknown/configs", kithttp.NewServer(
-		listEndpoint(svc),
-		decodeUnknownRequest,
+	r.Get("/things/bootstrap/:external_id", kithttp.NewServer(
+		bootstrapEndpoint(svc, reader, false),
+		decodeBootstrapRequest,
 		encodeResponse,
 		opts...))
 
-	r.Get("/things/bootstrap/:external_id", kithttp.NewServer(
-		bootstrapEndpoint(svc, reader),
+	r.Get("/things/bootstrap/secure/:external_id", kithttp.NewServer(
+		bootstrapEndpoint(svc, reader, true),
 		decodeBootstrapRequest,
-		encodeResponse,
+		encodeSecureRes,
 		opts...))
 
 	r.Put("/things/state/:id", kithttp.NewServer(
@@ -109,9 +113,9 @@ func decodeAddRequest(_ context.Context, r *http.Request) (interface{}, error) {
 		return nil, errUnsupportedContentType
 	}
 
-	req := addReq{key: r.Header.Get("Authorization")}
+	req := addReq{token: r.Header.Get("Authorization")}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		return nil, err
+		return nil, errors.Wrap(bootstrap.ErrMalformedEntity, err)
 	}
 
 	return req, nil
@@ -125,7 +129,24 @@ func decodeUpdateRequest(_ context.Context, r *http.Request) (interface{}, error
 	req := updateReq{key: r.Header.Get("Authorization")}
 	req.id = bone.GetValue(r, "id")
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		return nil, err
+		return nil, errors.Wrap(bootstrap.ErrMalformedEntity, err)
+	}
+
+	return req, nil
+}
+
+func decodeUpdateCertRequest(_ context.Context, r *http.Request) (interface{}, error) {
+	if !strings.Contains(r.Header.Get("Content-Type"), contentType) {
+		return nil, errUnsupportedContentType
+	}
+
+	req := updateCertReq{
+		key:     r.Header.Get("Authorization"),
+		thingID: bone.GetValue(r, "id"),
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		return nil, errors.Wrap(bootstrap.ErrMalformedEntity, err)
 	}
 
 	return req, nil
@@ -139,28 +160,7 @@ func decodeUpdateConnRequest(_ context.Context, r *http.Request) (interface{}, e
 	req := updateConnReq{key: r.Header.Get("Authorization")}
 	req.id = bone.GetValue(r, "id")
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		return nil, err
-	}
-
-	return req, nil
-}
-
-func decodeUnknownRequest(_ context.Context, r *http.Request) (interface{}, error) {
-	q, err := url.ParseQuery(r.URL.RawQuery)
-	if err != nil {
-		return nil, errInvalidQueryParams
-	}
-
-	offset, limit, err := parsePagePrams(q)
-	if err != nil {
-		return nil, err
-	}
-
-	req := listReq{
-		key:    r.Header.Get("Authorization"),
-		filter: bootstrap.Filter{Unknown: true},
-		offset: offset,
-		limit:  limit,
+		return nil, errors.Wrap(bootstrap.ErrMalformedEntity, err)
 	}
 
 	return req, nil
@@ -206,7 +206,7 @@ func decodeStateRequest(_ context.Context, r *http.Request) (interface{}, error)
 	req := changeStateReq{key: r.Header.Get("Authorization")}
 	req.id = bone.GetValue(r, "id")
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		return nil, err
+		return nil, errors.Wrap(bootstrap.ErrMalformedEntity, err)
 	}
 
 	return req, nil
@@ -238,33 +238,50 @@ func encodeResponse(_ context.Context, w http.ResponseWriter, response interface
 	return json.NewEncoder(w).Encode(response)
 }
 
-func encodeError(_ context.Context, err error, w http.ResponseWriter) {
+func encodeSecureRes(_ context.Context, w http.ResponseWriter, response interface{}) error {
 	w.Header().Set("Content-Type", contentType)
+	w.WriteHeader(http.StatusOK)
+	if b, ok := response.([]byte); ok {
+		if _, err := w.Write(b); err != nil {
+			return err
+		}
+	}
+	return nil
+}
 
-	switch err {
-	case errUnsupportedContentType:
-		w.WriteHeader(http.StatusUnsupportedMediaType)
-	case errInvalidQueryParams, bootstrap.ErrMalformedEntity:
-		w.WriteHeader(http.StatusBadRequest)
-	case bootstrap.ErrNotFound:
-		w.WriteHeader(http.StatusNotFound)
-	case bootstrap.ErrUnauthorizedAccess:
-		w.WriteHeader(http.StatusForbidden)
-	case bootstrap.ErrConflict:
-		w.WriteHeader(http.StatusConflict)
-	case bootstrap.ErrThings:
-		w.WriteHeader(http.StatusServiceUnavailable)
-	case io.EOF:
-		w.WriteHeader(http.StatusBadRequest)
-	default:
-		switch err.(type) {
-		case *json.SyntaxError:
+func encodeError(_ context.Context, err error, w http.ResponseWriter) {
+	switch errorVal := err.(type) {
+	case errors.Error:
+		w.Header().Set("Content-Type", contentType)
+		switch {
+		case errors.Contains(errorVal, errUnsupportedContentType):
+			w.WriteHeader(http.StatusUnsupportedMediaType)
+		case errors.Contains(errorVal, errInvalidQueryParams):
 			w.WriteHeader(http.StatusBadRequest)
-		case *json.UnmarshalTypeError:
+		case errors.Contains(errorVal, bootstrap.ErrMalformedEntity):
+			w.WriteHeader(http.StatusBadRequest)
+		case errors.Contains(errorVal, bootstrap.ErrNotFound):
+			w.WriteHeader(http.StatusNotFound)
+		case errors.Contains(errorVal, bootstrap.ErrUnauthorizedAccess):
+			w.WriteHeader(http.StatusForbidden)
+		case errors.Contains(errorVal, bootstrap.ErrConflict):
+			w.WriteHeader(http.StatusConflict)
+		case errors.Contains(errorVal, bootstrap.ErrThings):
+			w.WriteHeader(http.StatusServiceUnavailable)
+		case errors.Contains(errorVal, io.EOF):
+			w.WriteHeader(http.StatusBadRequest)
+		case errors.Contains(errorVal, io.ErrUnexpectedEOF):
 			w.WriteHeader(http.StatusBadRequest)
 		default:
 			w.WriteHeader(http.StatusInternalServerError)
 		}
+		if errorVal.Msg() != "" {
+			if err := json.NewEncoder(w).Encode(errorRes{Err: errorVal.Msg()}); err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+			}
+		}
+	default:
+		w.WriteHeader(http.StatusInternalServerError)
 	}
 }
 
@@ -285,13 +302,13 @@ func parsePagePrams(q url.Values) (uint64, uint64, error) {
 	offset, err := parseUint(q.Get("offset"))
 	q.Del("offset")
 	if err != nil {
-		return 0, 0, err
+		return 0, 0, errors.Wrap(errInvalidOffsetParam, err)
 	}
 
 	limit, err := parseUint(q.Get("limit"))
 	q.Del("limit")
 	if err != nil {
-		return 0, 0, err
+		return 0, 0, errors.Wrap(errInvalidLimitParam, err)
 	}
 
 	if limit > maxLimit {

bootstrap/configs.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package bootstrap
 
@@ -16,6 +12,9 @@ type Config struct {
 	MFThing     string
 	Owner       string
 	Name        string
+	ClientCert  string
+	ClientKey   string
+	CACert      string
 	MFKey       string
 	MFChannels  []Channel
 	ExternalID  string
@@ -28,12 +27,11 @@ type Config struct {
 type Channel struct {
 	ID       string
 	Name     string
-	Metadata interface{}
+	Metadata map[string]interface{}
 }
 
 // Filter is used for the search filters.
 type Filter struct {
-	Unknown      bool
 	FullMatch    map[string]string
 	PartialMatch map[string]string
 }
@@ -51,56 +49,54 @@ type ConfigsPage struct {
 type ConfigRepository interface {
 	// Save persists the Config. Successful operation is indicated by non-nil
 	// error response.
-	Save(Config, []string) (string, error)
+	Save(cfg Config, chsConnIDs []string) (string, error)
 
 	// RetrieveByID retrieves the Config having the provided identifier, that is owned
 	// by the specified user.
-	RetrieveByID(string, string) (Config, error)
+	RetrieveByID(owner, id string) (Config, error)
 
 	// RetrieveAll retrieves a subset of Configs that are owned
 	// by the specific user, with given filter parameters.
-	RetrieveAll(string, Filter, uint64, uint64) ConfigsPage
+	RetrieveAll(owner string, filter Filter, offset, limit uint64) ConfigsPage
 
 	// RetrieveByExternalID returns Config for given external ID.
-	RetrieveByExternalID(string, string) (Config, error)
+	RetrieveByExternalID(externalID string) (Config, error)
 
-	// Update performs and update to an existing Config. A non-nil error is returned
+	// Update updates an existing Config. A non-nil error is returned
 	// to indicate operation failure.
-	Update(Config) error
+	Update(cfg Config) error
+
+	// UpdateCerts updates an existing Config certificate and owner.
+	// A non-nil error is returned to indicate operation failure.
+	UpdateCert(owner, thingID, clientCert, clientKey, caCert string) error
 
 	// UpdateConnections updates a list of Channels the Config is connected to
 	// adding new Channels if needed.
-	UpdateConnections(string, string, []Channel, []string) error
+	UpdateConnections(owner, id string, channels []Channel, connections []string) error
 
 	// Remove removes the Config having the provided identifier, that is owned
 	// by the specified user.
-	Remove(string, string) error
+	Remove(owner, id string) error
 
 	// ChangeState changes of the Config, that is owned by the specific user.
-	ChangeState(string, string, State) error
-
-	// SaveUnknown saves Thing which unsuccessfully bootstrapped.
-	SaveUnknown(string, string) error
-
-	// RetrieveUnknown returns a subset of unsuccessfully bootstrapped Things.
-	RetrieveUnknown(uint64, uint64) ConfigsPage
+	ChangeState(owner, id string, state State) error
 
 	// ListExisting retrieves those channels from the given list that exist in DB.
-	ListExisting(string, []string) ([]Channel, error)
+	ListExisting(owner string, ids []string) ([]Channel, error)
 
 	// Methods RemoveThing, UpdateChannel, and RemoveChannel are related to
 	// event sourcing. That's why these methods surpass ownership check.
 
 	// RemoveThing removes Config of the Thing with the given ID.
-	RemoveThing(string) error
+	RemoveThing(id string) error
 
 	// UpdateChannel updates channel with the given ID.
-	UpdateChannel(Channel) error
+	UpdateChannel(c Channel) error
 
 	// RemoveChannel removes channel with the given ID.
-	RemoveChannel(string) error
+	RemoveChannel(id string) error
 
 	// DisconnectHandler changes state of the Config when the corresponding Thing is
 	// disconnected from the Channel.
-	DisconnectThing(string, string) error
+	DisconnectThing(channelID, thingID string) error
 }

bootstrap/doc.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 // Package bootstrap contains the domain concept definitions needed to support
 // Mainflux bootstrap service functionality.

bootstrap/mocks/configs.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package mocks
 
@@ -28,15 +24,13 @@ type configRepositoryMock struct {
 	counter  uint64
 	configs  map[string]bootstrap.Config
 	channels map[string]bootstrap.Channel
-	unknown  map[string]string
 }
 
-// NewConfigsRepository creates in-memory thing repository.
-func NewConfigsRepository(unknown map[string]string) bootstrap.ConfigRepository {
+// NewConfigsRepository creates in-memory config repository.
+func NewConfigsRepository() bootstrap.ConfigRepository {
 	return &configRepositoryMock{
 		configs:  make(map[string]bootstrap.Config),
 		channels: make(map[string]bootstrap.Channel),
-		unknown:  unknown,
 	}
 }
 
@@ -65,12 +59,11 @@ func (crm *configRepositoryMock) Save(config bootstrap.Config, connections []str
 	}
 
 	crm.configs[config.MFThing] = config
-	delete(crm.unknown, config.ExternalID)
 
 	return config.MFThing, nil
 }
 
-func (crm *configRepositoryMock) RetrieveByID(key, id string) (bootstrap.Config, error) {
+func (crm *configRepositoryMock) RetrieveByID(token, id string) (bootstrap.Config, error) {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
@@ -78,7 +71,7 @@ func (crm *configRepositoryMock) RetrieveByID(key, id string) (bootstrap.Config,
 	if !ok {
 		return bootstrap.Config{}, bootstrap.ErrNotFound
 	}
-	if c.Owner != key {
+	if c.Owner != token {
 		return bootstrap.Config{}, bootstrap.ErrUnauthorizedAccess
 	}
 
@@ -86,7 +79,7 @@ func (crm *configRepositoryMock) RetrieveByID(key, id string) (bootstrap.Config,
 
 }
 
-func (crm *configRepositoryMock) RetrieveAll(key string, filter bootstrap.Filter, offset, limit uint64) bootstrap.ConfigsPage {
+func (crm *configRepositoryMock) RetrieveAll(token string, filter bootstrap.Filter, offset, limit uint64) bootstrap.ConfigsPage {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
@@ -114,7 +107,7 @@ func (crm *configRepositoryMock) RetrieveAll(key string, filter bootstrap.Filter
 		id, _ := strconv.ParseUint(v.MFThing, 10, 64)
 		if (state == emptyState || v.State == state) &&
 			(name == "" || strings.Index(strings.ToLower(v.Name), name) != notFoundIdx) &&
-			v.Owner == key {
+			v.Owner == token {
 			if id >= first && id < last {
 				configs = append(configs, v)
 			}
@@ -134,13 +127,13 @@ func (crm *configRepositoryMock) RetrieveAll(key string, filter bootstrap.Filter
 	}
 }
 
-func (crm *configRepositoryMock) RetrieveByExternalID(externalKey, externalID string) (bootstrap.Config, error) {
+func (crm *configRepositoryMock) RetrieveByExternalID(externalID string) (bootstrap.Config, error) {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
-	for _, thing := range crm.configs {
-		if thing.ExternalID == externalID && thing.ExternalKey == externalKey {
-			return thing, nil
+	for _, cfg := range crm.configs {
+		if cfg.ExternalID == externalID {
+			return cfg, nil
 		}
 	}
 
@@ -163,7 +156,28 @@ func (crm *configRepositoryMock) Update(config bootstrap.Config) error {
 	return nil
 }
 
-func (crm *configRepositoryMock) UpdateConnections(key, id string, channels []bootstrap.Channel, connections []string) error {
+func (crm *configRepositoryMock) UpdateCert(owner, thingID, clientCert, clientKey, caCert string) error {
+	crm.mu.Lock()
+	defer crm.mu.Unlock()
+	var forUpdate bootstrap.Config
+	for _, v := range crm.configs {
+		if v.MFThing == thingID && v.Owner == owner {
+			forUpdate = v
+			break
+		}
+	}
+	if _, ok := crm.configs[forUpdate.MFThing]; !ok {
+		return bootstrap.ErrNotFound
+	}
+	forUpdate.ClientCert = clientCert
+	forUpdate.ClientKey = clientKey
+	forUpdate.CACert = caCert
+	crm.configs[forUpdate.MFThing] = forUpdate
+
+	return nil
+}
+
+func (crm *configRepositoryMock) UpdateConnections(token, id string, channels []bootstrap.Channel, connections []string) error {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
@@ -171,6 +185,7 @@ func (crm *configRepositoryMock) UpdateConnections(key, id string, channels []bo
 	if !ok {
 		return bootstrap.ErrNotFound
 	}
+
 	for _, ch := range channels {
 		crm.channels[ch.ID] = ch
 	}
@@ -188,12 +203,12 @@ func (crm *configRepositoryMock) UpdateConnections(key, id string, channels []bo
 	return nil
 }
 
-func (crm *configRepositoryMock) Remove(key, id string) error {
+func (crm *configRepositoryMock) Remove(token, id string) error {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
 	for k, v := range crm.configs {
-		if v.Owner == key && k == id {
+		if v.Owner == token && k == id {
 			delete(crm.configs, k)
 			break
 		}
@@ -202,7 +217,7 @@ func (crm *configRepositoryMock) Remove(key, id string) error {
 	return nil
 }
 
-func (crm *configRepositoryMock) ChangeState(key, id string, state bootstrap.State) error {
+func (crm *configRepositoryMock) ChangeState(token, id string, state bootstrap.State) error {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 
@@ -210,7 +225,7 @@ func (crm *configRepositoryMock) ChangeState(key, id string, state bootstrap.Sta
 	if !ok {
 		return bootstrap.ErrNotFound
 	}
-	if config.Owner != key {
+	if config.Owner != token {
 		return bootstrap.ErrUnauthorizedAccess
 	}
 
@@ -219,60 +234,7 @@ func (crm *configRepositoryMock) ChangeState(key, id string, state bootstrap.Sta
 	return nil
 }
 
-func (crm *configRepositoryMock) RetrieveUnknown(offset, limit uint64) bootstrap.ConfigsPage {
-	crm.mu.Lock()
-	defer crm.mu.Unlock()
-
-	configs := []bootstrap.Config{}
-	i := uint64(0)
-	l := int(limit)
-	var keys []string
-	for k := range crm.unknown {
-		keys = append(keys, k)
-	}
-	sort.Strings(keys)
-
-	for _, k := range keys {
-		if i >= offset && len(configs) < l {
-			configs = append(configs, bootstrap.Config{
-				ExternalID:  k,
-				ExternalKey: crm.unknown[k],
-			})
-		}
-		i++
-	}
-
-	return bootstrap.ConfigsPage{
-		Total:   uint64(len(crm.unknown)),
-		Offset:  offset,
-		Limit:   limit,
-		Configs: configs,
-	}
-}
-
-func (crm *configRepositoryMock) RemoveUnknown(key, id string) error {
-	crm.mu.Lock()
-	defer crm.mu.Unlock()
-
-	for k, v := range crm.unknown {
-		if k == id && v == key {
-			delete(crm.unknown, k)
-			return nil
-		}
-	}
-
-	return nil
-}
-
-func (crm *configRepositoryMock) SaveUnknown(key, id string) error {
-	crm.mu.Lock()
-	defer crm.mu.Unlock()
-
-	crm.unknown[id] = key
-	return nil
-}
-
-func (crm *configRepositoryMock) ListExisting(key string, connections []string) ([]bootstrap.Channel, error) {
+func (crm *configRepositoryMock) ListExisting(token string, connections []string) ([]bootstrap.Channel, error) {
 	crm.mu.Lock()
 	defer crm.mu.Unlock()
 

bootstrap/mocks/things.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package mocks
 
@@ -23,43 +19,45 @@ type mainfluxThings struct {
 	counter     uint64
 	things      map[string]things.Thing
 	channels    map[string]things.Channel
-	users       mainflux.UsersServiceClient
+	auth        mainflux.AuthNServiceClient
 	connections map[string][]string
 }
 
 // NewThingsService returns Mainflux Things service mock.
 // Only methods used by SDK are mocked.
-func NewThingsService(things map[string]things.Thing, channels map[string]things.Channel, users mainflux.UsersServiceClient) things.Service {
+func NewThingsService(things map[string]things.Thing, channels map[string]things.Channel, authn mainflux.AuthNServiceClient) things.Service {
 	return &mainfluxThings{
 		things:      things,
 		channels:    channels,
-		users:       users,
+		auth:        authn,
 		connections: make(map[string][]string),
 	}
 }
 
-func (svc *mainfluxThings) AddThing(owner string, thing things.Thing) (things.Thing, error) {
+func (svc *mainfluxThings) CreateThings(_ context.Context, owner string, ths ...things.Thing) ([]things.Thing, error) {
 	svc.mu.Lock()
 	defer svc.mu.Unlock()
 
-	userID, err := svc.users.Identify(context.Background(), &mainflux.Token{Value: owner})
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
 	if err != nil {
-		return things.Thing{}, things.ErrUnauthorizedAccess
+		return []things.Thing{}, things.ErrUnauthorizedAccess
+	}
+	for i := range ths {
+		svc.counter++
+		ths[i].Owner = userID.Value
+		ths[i].ID = strconv.FormatUint(svc.counter, 10)
+		ths[i].Key = ths[i].ID
+		svc.things[ths[i].ID] = ths[i]
 	}
 
-	svc.counter++
-	thing.Owner = userID.Value
-	thing.ID = strconv.FormatUint(svc.counter, 10)
-	thing.Key = thing.ID
-	svc.things[thing.ID] = thing
-	return thing, nil
+	return ths, nil
 }
 
-func (svc *mainfluxThings) ViewThing(owner, id string) (things.Thing, error) {
+func (svc *mainfluxThings) ViewThing(_ context.Context, owner, id string) (things.Thing, error) {
 	svc.mu.Lock()
 	defer svc.mu.Unlock()
 
-	userID, err := svc.users.Identify(context.Background(), &mainflux.Token{Value: owner})
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
 	if err != nil {
 		return things.Thing{}, things.ErrUnauthorizedAccess
 	}
@@ -72,28 +70,31 @@ func (svc *mainfluxThings) ViewThing(owner, id string) (things.Thing, error) {
 	return things.Thing{}, things.ErrNotFound
 }
 
-func (svc *mainfluxThings) Connect(owner, chanID, thingID string) error {
+func (svc *mainfluxThings) Connect(_ context.Context, owner string, chIDs, thIDs []string) error {
 	svc.mu.Lock()
 	defer svc.mu.Unlock()
 
-	userID, err := svc.users.Identify(context.Background(), &mainflux.Token{Value: owner})
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
 	if err != nil {
 		return things.ErrUnauthorizedAccess
 	}
-
-	if svc.channels[chanID].Owner != userID.Value {
-		return things.ErrNotFound
+	for _, chID := range chIDs {
+		if svc.channels[chID].Owner != userID.Value {
+			return things.ErrUnauthorizedAccess
+		}
+		for _, thID := range thIDs {
+			svc.connections[chID] = append(svc.connections[chID], thID)
+		}
 	}
 
-	svc.connections[chanID] = append(svc.connections[chanID], thingID)
 	return nil
 }
 
-func (svc *mainfluxThings) Disconnect(owner, chanID, thingID string) error {
+func (svc *mainfluxThings) Disconnect(_ context.Context, owner, chanID, thingID string) error {
 	svc.mu.Lock()
 	defer svc.mu.Unlock()
 
-	userID, err := svc.users.Identify(context.Background(), &mainflux.Token{Value: owner})
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
 	if err != nil || svc.channels[chanID].Owner != userID.Value {
 		return things.ErrUnauthorizedAccess
 	}
@@ -121,11 +122,11 @@ func (svc *mainfluxThings) Disconnect(owner, chanID, thingID string) error {
 	return nil
 }
 
-func (svc *mainfluxThings) RemoveThing(owner, id string) error {
+func (svc *mainfluxThings) RemoveThing(_ context.Context, owner, id string) error {
 	svc.mu.Lock()
 	defer svc.mu.Unlock()
 
-	userID, err := svc.users.Identify(context.Background(), &mainflux.Token{Value: owner})
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
 	if err != nil {
 		return things.ErrUnauthorizedAccess
 	}
@@ -137,13 +138,13 @@ func (svc *mainfluxThings) RemoveThing(owner, id string) error {
 	delete(svc.things, id)
 	conns := make(map[string][]string)
 	for k, v := range svc.connections {
-		idx := findIndex(v, id)
-		if idx != -1 {
+		i := findIndex(v, id)
+		if i != -1 {
 			var tmp []string
-			if idx != len(v)-2 {
-				tmp = v[idx+1:]
+			if i != len(v)-2 {
+				tmp = v[i+1:]
 			}
-			conns[k] = append(v[:idx], tmp...)
+			conns[k] = append(v[:i], tmp...)
 		}
 	}
 
@@ -151,50 +152,72 @@ func (svc *mainfluxThings) RemoveThing(owner, id string) error {
 	return nil
 }
 
-func (svc *mainfluxThings) ViewChannel(owner, id string) (things.Channel, error) {
+func (svc *mainfluxThings) ViewChannel(_ context.Context, owner, id string) (things.Channel, error) {
 	if c, ok := svc.channels[id]; ok {
 		return c, nil
 	}
 	return things.Channel{}, things.ErrNotFound
 }
 
-func (svc *mainfluxThings) UpdateThing(string, things.Thing) error {
+func (svc *mainfluxThings) UpdateThing(context.Context, string, things.Thing) error {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) ListThings(string, uint64, uint64) (things.ThingsPage, error) {
+func (svc *mainfluxThings) UpdateKey(context.Context, string, string, string) error {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) ListChannelsByThing(string, string, uint64, uint64) (things.ChannelsPage, error) {
+func (svc *mainfluxThings) ListThings(context.Context, string, uint64, uint64, string, things.Metadata) (things.Page, error) {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) ListThingsByChannel(string, string, uint64, uint64) (things.ThingsPage, error) {
+func (svc *mainfluxThings) ListChannelsByThing(context.Context, string, string, uint64, uint64, bool) (things.ChannelsPage, error) {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) CreateChannel(string, things.Channel) (things.Channel, error) {
+func (svc *mainfluxThings) ListThingsByChannel(context.Context, string, string, uint64, uint64, bool) (things.Page, error) {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) UpdateChannel(string, things.Channel) error {
+func (svc *mainfluxThings) CreateChannels(_ context.Context, owner string, chs ...things.Channel) ([]things.Channel, error) {
+	svc.mu.Lock()
+	defer svc.mu.Unlock()
+
+	userID, err := svc.auth.Identify(context.Background(), &mainflux.Token{Value: owner})
+	if err != nil {
+		return []things.Channel{}, things.ErrUnauthorizedAccess
+	}
+	for i := range chs {
+		svc.counter++
+		chs[i].Owner = userID.Value
+		chs[i].ID = strconv.FormatUint(svc.counter, 10)
+		svc.channels[chs[i].ID] = chs[i]
+	}
+
+	return chs, nil
+}
+
+func (svc *mainfluxThings) UpdateChannel(context.Context, string, things.Channel) error {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) ListChannels(string, uint64, uint64) (things.ChannelsPage, error) {
+func (svc *mainfluxThings) ListChannels(context.Context, string, uint64, uint64, string, things.Metadata) (things.ChannelsPage, error) {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) RemoveChannel(string, string) error {
+func (svc *mainfluxThings) RemoveChannel(context.Context, string, string) error {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) CanAccess(string, string) (string, error) {
+func (svc *mainfluxThings) CanAccessByKey(context.Context, string, string) (string, error) {
 	panic("not implemented")
 }
 
-func (svc *mainfluxThings) Identify(string) (string, error) {
+func (svc *mainfluxThings) CanAccessByID(context.Context, string, string) error {
+	panic("not implemented")
+}
+
+func (svc *mainfluxThings) Identify(context.Context, string) (string, error) {
 	panic("not implemented")
 }
 

bootstrap/mocks/users.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package mocks
 
@@ -15,20 +11,30 @@ import (
 	"google.golang.org/grpc"
 )
 
-var _ mainflux.UsersServiceClient = (*usersServiceMock)(nil)
+var _ mainflux.AuthNServiceClient = (*serviceMock)(nil)
 
-type usersServiceMock struct {
+type serviceMock struct {
 	users map[string]string
 }
 
 // NewUsersService creates mock of users service.
-func NewUsersService(users map[string]string) mainflux.UsersServiceClient {
-	return &usersServiceMock{users}
+func NewUsersService(users map[string]string) mainflux.AuthNServiceClient {
+	return &serviceMock{users}
 }
 
-func (svc usersServiceMock) Identify(ctx context.Context, in *mainflux.Token, opts ...grpc.CallOption) (*mainflux.UserID, error) {
+func (svc serviceMock) Identify(ctx context.Context, in *mainflux.Token, opts ...grpc.CallOption) (*mainflux.UserID, error) {
 	if id, ok := svc.users[in.Value]; ok {
 		return &mainflux.UserID{Value: id}, nil
 	}
 	return nil, users.ErrUnauthorizedAccess
 }
+
+func (svc serviceMock) Issue(ctx context.Context, in *mainflux.IssueReq, opts ...grpc.CallOption) (*mainflux.Token, error) {
+	if id, ok := svc.users[in.GetIssuer()]; ok {
+		switch in.Type {
+		default:
+			return &mainflux.Token{Value: id}, nil
+		}
+	}
+	return nil, users.ErrUnauthorizedAccess
+}

bootstrap/openapi.yml

@@ -0,0 +1,509 @@
+openapi: 3.0.1
+info:
+  title: Mainflux Bootstrap service
+  description: HTTP API for managing platform things configuration.
+  version: "1.0.0"
+
+paths:
+  /things/configs:
+    post:
+      summary: Adds new config
+      description: |
+        Adds new config to the list of config owned by user identified using
+        the provided access token.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+      requestBody:
+        $ref: "#/components/requestBodies/ConfigCreateReq"
+      responses:
+        201:
+          $ref: "#/components/responses/ConfigCreateRes"
+        400:
+          description: Failed due to malformed JSON.
+        403:
+          description: Missing or invalid access token provided.
+        415:
+          description: Missing or invalid content type.
+        500:
+          $ref: "#/components/responses/ServiceError"
+    get:
+      summary: Retrieves managed configs
+      description: |
+        Retrieves a list of managed configs. Due to performance concerns, data
+        is retrieved in subsets. The API configs must ensure that the entire
+        dataset is consumed either by making subsequent requests, or by
+        increasing the subset size of the initial request.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/Limit"
+        - $ref: "#/components/parameters/Offset"
+        - $ref: "#/components/parameters/State"
+        - $ref: "#/components/parameters/Name"
+      responses:
+        200:
+          $ref: "#/components/responses/ConfigListRes"
+        400:
+          description: Failed due to malformed query parameters.
+        403:
+          description: Missing or invalid access token provided.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/configs/{configId}:
+    get:
+      summary: Retrieves config info (with channels).
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      responses:
+        200:
+          $ref: "#/components/responses/ConfigRes"
+        403:
+          description: Missing or invalid access token provided.
+        404:
+          description: Config does not exist.
+        500:
+          $ref: "#/components/responses/ServiceError"
+    put:
+      summary: Updates config info
+      description: |
+        Update is performed by replacing the current resource data with values
+        provided in a request payload. Note that the owner, ID, external ID,
+        external key, Mainflux Thing ID and key cannot be changed.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      requestBody:
+          $ref: "#/components/requestBodies/ConfigUpdateReq"
+      responses:
+        200:
+          description: Config updated.
+        400:
+          description: Failed due to malformed JSON.
+        403:
+          description: Missing or invalid access token provided.
+        404:
+          description: Config does not exist.
+        415:
+          description: Missing or invalid content type.
+        500:
+          $ref: "#/components/responses/ServiceError"
+    delete:
+      summary: Removes a Config
+      description: |
+        Removes a Config. In case of successful removal the service will ensure
+        that the removed config is disconnected from all of the Mainflux channels.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      responses:
+        204:
+          description: Config removed.
+        400:
+          description: Failed due to malformed config ID.
+        403:
+          description: Missing or invalid access token provided.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/configs/certs/{configId}:
+    patch:
+      summary: Updates certs
+      description: |
+        Update is performed by replacing the current certificate data with values
+        provided in a request payload.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      requestBody:
+        $ref: "#/components/requestBodies/ConfigCertUpdateReq"
+      responses:
+        200:
+          description: Config updated.
+        400:
+          description: Failed due to malformed JSON.
+        403:
+          description: Missing or invalid access token provided.
+        404:
+          description: Config does not exist.
+        415:
+          description: Missing or invalid content type.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/configs/connections/{configId}:
+    put:
+      summary: Updates channels the thing is connected to
+      description: |
+        Update connections performs update of the channel list corresponding
+        Thing is connected to.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      requestBody:
+        $ref: "#/components/requestBodies/ConfigConnUpdateReq"
+      responses:
+        200:
+          description: Config updated.
+        400:
+          description: Failed due to malformed JSON.
+        403:
+          description: Missing or invalid access token provided.
+        404:
+          description: Config does not exist.
+        415:
+          description: Missing or invalid content type.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/bootstrap/{externalId}:
+    get:
+      summary: Retrieves configuration.
+      description: |
+        Retrieves a configuration with given external ID and external key.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/ConfigAuth"
+        - $ref: "#/components/parameters/ExternalId"
+      responses:
+        200:
+          $ref: "#/components/responses/BootstrapConfigRes"
+        404:
+          description: |
+            Failed to retrieve corresponding config.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/bootstrap/secure/{externalId}:
+    get:
+      summary: Retrieves configuration.
+      description: |
+        Retrieves a configuration with given external ID and encrypted external key.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/EncConfigAuth"
+        - $ref: "#/components/parameters/ExternalId"
+      responses:
+        200:
+          $ref: "#/components/responses/BootstrapConfigRes"
+        404:
+          description: |
+            Failed to retrieve corresponding config. 
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /things/state/{configId}:
+    put:
+      summary: Updates Config state.
+      description: |
+        Updating state represents enabling/disabling Config, i.e. connecting
+        and disconnecting corresponding Mainflux Thing to the list of Channels.
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ConfigId"
+      requestBody:
+        $ref: '#/components/requestBodies/ConfigStateUpdateReq'
+      responses:
+        204:
+          description: Config removed.
+        400:
+          description: Failed due to malformed config's ID.
+        403:
+          description: Missing or invalid access token provided.
+        500:
+          $ref: "#/components/responses/ServiceError"
+
+components:
+  schemas:
+    State:
+      type: integer
+      enum: [0, 1]    
+    Config:
+      type: object
+      properties:
+        mainflux_id:
+          type: string
+          description: Corresponding Mainflux Thing ID.
+        mainflux_key:
+          type: string
+          description: Corresponding Mainflux Thing key.
+        mainflux_channels:
+          type: array
+          minItems: 0
+          items:
+            type: object
+            properties:
+              id:
+                type: string
+                description: ID of the Channel.
+              name:
+                type: string
+                description: Name of the Channel.
+              metadata:
+                type: object
+                description: Custom metadata related to the Channel.
+        external_id:
+          type: string
+          description: External ID (MAC address or some unique identifier).
+        external_key:
+          type: string
+          description: External key.
+        content:
+          type: string
+          description: Free-form custom configuration.
+        state:
+          $ref: "#/components/schemas/State"
+      required:
+        - external_id
+        - external_key    
+    ConfigList:
+      type: object
+      properties:
+        total:
+          type: integer
+          description: Total number of results.
+          minimum: 0
+        offset:
+          type: integer
+          description: Number of items to skip during retrieval.
+          minimum: 0
+          default: 0
+        limit:
+          type: integer
+          description: Size of the subset to retrieve.
+          maximum: 100
+          default: 10
+        configs:
+          type: array
+          minItems: 0
+          uniqueItems: true
+          items:
+            $ref: "#/components/schemas/Config"
+      required:
+        - configs
+    BootstrapConfig:
+      type: object
+      properties:
+        mainflux_id:
+          type: string
+          description: Corresponding Mainflux Thing ID.
+        mainflux_key:
+          type: string
+          description: Corresponding Mainflux Thing key.
+        mainflux_channels:
+          type: array
+          minItems: 0
+          items:
+            type: string
+        content:
+          type: string
+          description: Free-form custom configuration.
+        client_cert:
+          type: string
+          description: Client certificate.
+        client_key:
+          type: string
+          description: Key for the client_cert.
+        ca_cert:
+          type: string
+          description: Issuing CA certificate.
+      required:
+        - mainflux_id
+        - mainflux_key
+        - mainflux_channels
+        - content          
+
+  parameters:
+    Authorization:
+      name: Authorization
+      description: User's access token.
+      in: header
+      schema:
+        type: string
+      required: true
+    ConfigAuth:
+      name: configAuthorization
+      description: Configuration external key.
+      in: header
+      schema:
+        type: string
+      required: true
+    EncConfigAuth:
+      name: configAuthorization
+      description: |
+        Hex-encoded configuration external key encrypted using 
+        the AES algorithm and SHA256 sum of the external key 
+        itself as an encryption key.
+      in: header
+      schema:
+        type: string
+      required: true
+    ConfigId:
+      name: configId
+      description: Unique Config identifier. It's the ID of the corresponding Thing.
+      in: path
+      schema:
+        type: string
+      required: true
+    ExternalId:
+      name: externalId
+      description: Unique Config identifier provided by external entity.
+      in: path
+      schema:
+        type: string
+      required: true
+    Limit:
+      name: limit
+      description: Size of the subset to retrieve.
+      in: query
+      schema:
+        type: integer
+        default: 10
+        maximum: 100
+        minimum: 1
+      required: false
+    Offset:
+      name: offset
+      description: Number of items to skip during retrieval.
+      in: query
+      schema:
+        type: integer
+        default: 0
+        minimum: 0
+      required: false
+    State:
+      name: state
+      description: A state of items
+      in: query
+      schema:
+        $ref: "#/components/schemas/State"
+      required: false
+    Name:
+      name: name
+      description: Name of the config. Search by name is partial-match and case-insensitive.
+      in: query
+      schema:
+        type: string
+      required: false
+
+  requestBodies:
+    ConfigCreateReq:
+      description: JSON-formatted document describing the new config.
+      required: true
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              external_id:
+                type: string
+                description: External ID (MAC address or some unique identifier).
+              external_key:
+                type: string
+                description: External key.
+              thing_id:
+                type: string
+                description: ID of the corresponding Mainflux Thing.
+              channels:
+                type: array
+                minItems: 0
+                items:
+                  type: string
+              content:
+                type: string
+            required:
+              - external_id
+              - external_key
+    ConfigUpdateReq:
+      description: JSON-formatted document describing the updated thing.
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              content:
+                type: string
+              name:
+                type: string
+            required:
+              - content
+              - name
+    ConfigCertUpdateReq:
+      description: JSON-formatted document describing the updated thing.
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              client_cert:
+                type: string
+              client_key:
+                type: string
+              ca_cert:
+                type: string                
+    ConfigConnUpdateReq:
+      description: Array if IDs the thing is be connected to.
+      content:
+        application/json:
+          schema:      
+            type: object
+            properties:
+              channels:
+                type: array
+                minItems: 0
+                items:
+                  type: string
+    ConfigStateUpdateReq:
+      description: Update the state of the Config.
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              state:
+                $ref: "#/components/schemas/State"
+
+  responses:
+    ConfigCreateRes:
+     description: Config registered.
+     headers:
+       Location:
+         content:
+           text/plain:
+             schema:
+               type: string
+               description: Created configuration's relative URL (i.e. /things/configs/{configId}).
+    ConfigListRes:
+      description: Data retrieved. Configs from this list don't contain channels.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ConfigList"
+    ConfigRes:
+      description: Data retrieved.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Config"
+    BootstrapConfigRes:
+      description: |
+          Data retrieved. If secure, a response is encrypted using
+          the secret key, so the response is in the binary form.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/BootstrapConfig"
+    ServiceError:
+      description: Unexpected server-side error occurred.

bootstrap/postgres/configs.go

@@ -1,20 +1,19 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package postgres
 
 import (
 	"database/sql"
+	"encoding/json"
 	"fmt"
 	"strings"
 
+	"github.com/jmoiron/sqlx"
 	"github.com/lib/pq"
 	"github.com/mainflux/mainflux/bootstrap"
 	"github.com/mainflux/mainflux/logger"
+	"github.com/mainflux/mainflux/pkg/errors"
 )
 
 const (
@@ -29,32 +28,45 @@ const (
 						 SELECT channel_id FROM connections c WHERE ch.mainflux_channel = c.channel_id);`
 )
 
+var (
+	errSaveDB           = errors.New("failed to save bootstrap configuration to database")
+	errMarshalChannel   = errors.New("failed to marshal channel into json")
+	errUnmarshalChannel = errors.New("failed to unmarshal json to channel")
+	errSaveChannels     = errors.New("failed to insert channels to database")
+	errSaveConnections  = errors.New("failed to insert connections to database")
+	errRetrieve         = errors.New("failed to retreive bootstrap configuration from database")
+	errUpdate           = errors.New("failed to update bootstrap configuration in database")
+	errRemove           = errors.New("failed to remove bootstrap configuration from database")
+	errUpdateChannels   = errors.New("failed to update channels in bootstrap configuration database")
+	errRemoveChannels   = errors.New("failed to remove channels from bootstrap configuration in database")
+	errDisconnectThing  = errors.New("failed to disconnect thing in bootstrap configuration in database")
+)
+
 var _ bootstrap.ConfigRepository = (*configRepository)(nil)
 
 type configRepository struct {
-	db  *sql.DB
+	db  *sqlx.DB
 	log logger.Logger
 }
 
-// NewConfigRepository instantiates a PostgreSQL implementation of thing
+// NewConfigRepository instantiates a PostgreSQL implementation of config
 // repository.
-func NewConfigRepository(db *sql.DB, log logger.Logger) bootstrap.ConfigRepository {
+func NewConfigRepository(db *sqlx.DB, log logger.Logger) bootstrap.ConfigRepository {
 	return &configRepository{db: db, log: log}
 }
 
-func (cr configRepository) Save(cfg bootstrap.Config, connections []string) (string, error) {
-	q := `INSERT INTO configs (mainflux_thing, owner, name, mainflux_key, external_id, external_key, content, state)
-		VALUES ($1, $2, $3, $4, $5, $6, $7, $8)`
-
-	content := nullString(cfg.Content)
-	name := nullString(cfg.Name)
-	tx, err := cr.db.Begin()
+func (cr configRepository) Save(cfg bootstrap.Config, chsConnIDs []string) (string, error) {
+	q := `INSERT INTO configs (mainflux_thing, owner, name, client_cert, client_key, ca_cert, mainflux_key, external_id, external_key, content, state)
+		  VALUES (:mainflux_thing, :owner, :name, :client_cert, :client_key, :ca_cert, :mainflux_key, :external_id, :external_key, :content, :state)`
 
+	tx, err := cr.db.Beginx()
 	if err != nil {
-		return "", err
+		return "", errors.Wrap(errSaveDB, err)
 	}
 
-	if _, err := tx.Exec(q, cfg.MFThing, cfg.Owner, name, cfg.MFKey, cfg.ExternalID, cfg.ExternalKey, content, cfg.State); err != nil {
+	dbcfg := toDBConfig(cfg)
+
+	if _, err := tx.NamedExec(q, dbcfg); err != nil {
 		e := err
 		if pqErr, ok := err.(*pq.Error); ok && pqErr.Code.Name() == duplicateErr {
 			e = bootstrap.ErrConflict
@@ -62,27 +74,19 @@ func (cr configRepository) Save(cfg bootstrap.Config, connections []string) (str
 
 		cr.rollback("Failed to insert a Config", tx, err)
 
-		return "", e
+		return "", errors.Wrap(errSaveDB, e)
 	}
 
 	if err := insertChannels(cfg.Owner, cfg.MFChannels, tx); err != nil {
 		cr.rollback("Failed to insert Channels", tx, err)
 
-		return "", err
+		return "", errors.Wrap(errSaveChannels, err)
 	}
 
-	if err := insertConnections(cfg, connections, tx); err != nil {
+	if err := insertConnections(cfg, chsConnIDs, tx); err != nil {
 		cr.rollback("Failed to insert connections", tx, err)
 
-		return "", err
-	}
-
-	q = "DELETE FROM unknown_configs WHERE external_id = $1 AND external_key = $2"
-
-	if _, err := tx.Exec(q, cfg.ExternalID, cfg.ExternalKey); err != nil {
-		cr.rollback("Failed to remove from unknown", tx, err)
-
-		return "", err
+		return "", errors.Wrap(errSaveConnections, err)
 	}
 
 	if err := tx.Commit(); err != nil {
@@ -92,54 +96,65 @@ func (cr configRepository) Save(cfg bootstrap.Config, connections []string) (str
 	return cfg.MFThing, nil
 }
 
-func (cr configRepository) RetrieveByID(key, id string) (bootstrap.Config, error) {
-	q := `SELECT mainflux_thing, mainflux_key, external_id, external_key, name, content, state FROM configs WHERE mainflux_thing = $1 AND owner = $2`
-	cfg := bootstrap.Config{MFThing: id, Owner: key, MFChannels: []bootstrap.Channel{}}
-	var name, content sql.NullString
-	if err := cr.db.QueryRow(q, id, key).
-		Scan(&cfg.MFThing, &cfg.MFKey, &cfg.ExternalID, &cfg.ExternalKey, &name, &content, &cfg.State); err != nil {
+func (cr configRepository) RetrieveByID(owner, id string) (bootstrap.Config, error) {
+	q := `SELECT mainflux_thing, mainflux_key, external_id, external_key, name, content, state
+		  FROM configs
+		  WHERE mainflux_thing = $1 AND owner = $2`
+
+	dbcfg := dbConfig{
+		MFThing: id,
+		Owner:   owner,
+	}
+
+	if err := cr.db.QueryRowx(q, id, owner).StructScan(&dbcfg); err != nil {
 		empty := bootstrap.Config{}
 		if err == sql.ErrNoRows {
-			return empty, bootstrap.ErrNotFound
+			return empty, errors.Wrap(bootstrap.ErrNotFound, err)
 		}
 
-		return empty, err
+		return empty, errors.Wrap(errRetrieve, err)
 	}
 
 	q = `SELECT mainflux_channel, name, metadata FROM channels ch
-	INNER JOIN connections conn
-	ON ch.mainflux_channel = conn.channel_id AND ch.owner = conn.config_owner
-	WHERE conn.config_id = $1 AND conn.config_owner = $2`
+		 INNER JOIN connections conn
+		 ON ch.mainflux_channel = conn.channel_id AND ch.owner = conn.config_owner
+		 WHERE conn.config_id = :mainflux_thing AND conn.config_owner = :owner`
 
-	rows, err := cr.db.Query(q, cfg.MFThing, cfg.Owner)
+	rows, err := cr.db.NamedQuery(q, dbcfg)
 	if err != nil {
 		cr.log.Error(fmt.Sprintf("Failed to retrieve connected due to %s", err))
-		return bootstrap.Config{}, err
+		return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
 	}
 	defer rows.Close()
 
+	chans := []bootstrap.Channel{}
 	for rows.Next() {
-		c := bootstrap.Channel{}
-		if err := rows.Scan(&c.ID, &c.Name, &c.Metadata); err != nil {
+		dbch := dbChannel{}
+		if err := rows.StructScan(&dbch); err != nil {
 			cr.log.Error(fmt.Sprintf("Failed to read connected thing due to %s", err))
-			return bootstrap.Config{}, err
+			return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
 		}
+		dbch.Owner = nullString(dbcfg.Owner)
 
-		cfg.MFChannels = append(cfg.MFChannels, c)
+		ch, err := toChannel(dbch)
+		if err != nil {
+			return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
+		}
+		chans = append(chans, ch)
 	}
 
-	cfg.Content = content.String
-	cfg.Name = name.String
+	cfg := toConfig(dbcfg)
+	cfg.MFChannels = chans
 
 	return cfg, nil
 }
 
-func (cr configRepository) RetrieveAll(key string, filter bootstrap.Filter, offset, limit uint64) bootstrap.ConfigsPage {
-	search, params := cr.retrieveAll(key, filter)
+func (cr configRepository) RetrieveAll(owner string, filter bootstrap.Filter, offset, limit uint64) bootstrap.ConfigsPage {
+	search, params := cr.retrieveAll(owner, filter)
 	n := len(params)
 
 	q := `SELECT mainflux_thing, mainflux_key, external_id, external_key, name, content, state
-	FROM configs %s ORDER BY mainflux_thing LIMIT $%d OFFSET $%d`
+	      FROM configs %s ORDER BY mainflux_thing LIMIT $%d OFFSET $%d`
 	q = fmt.Sprintf(q, search, n+1, n+2)
 
 	rows, err := cr.db.Query(q, append(params, limit, offset)...)
@@ -153,7 +168,7 @@ func (cr configRepository) RetrieveAll(key string, filter bootstrap.Filter, offs
 	configs := []bootstrap.Config{}
 
 	for rows.Next() {
-		c := bootstrap.Config{Owner: key}
+		c := bootstrap.Config{Owner: owner}
 		if err := rows.Scan(&c.MFThing, &c.MFKey, &c.ExternalID, &c.ExternalKey, &name, &content, &c.State); err != nil {
 			cr.log.Error(fmt.Sprintf("Failed to read retrieved config due to %s", err))
 			return bootstrap.ConfigsPage{}
@@ -180,44 +195,53 @@ func (cr configRepository) RetrieveAll(key string, filter bootstrap.Filter, offs
 	}
 }
 
-func (cr configRepository) RetrieveByExternalID(externalKey, externalID string) (bootstrap.Config, error) {
-	q := `SELECT mainflux_thing, mainflux_key, owner, name, content, state FROM configs WHERE external_key = $1 AND external_id = $2`
-	cfg := bootstrap.Config{ExternalID: externalID, ExternalKey: externalKey, MFChannels: []bootstrap.Channel{}}
-	var name, content sql.NullString
+func (cr configRepository) RetrieveByExternalID(externalID string) (bootstrap.Config, error) {
+	q := `SELECT mainflux_thing, mainflux_key, external_key, owner, name, client_cert, client_key, ca_cert, content, state
+		  FROM configs
+		  WHERE external_id = $1`
+	dbcfg := dbConfig{
+		ExternalID: externalID,
+	}
 
-	if err := cr.db.QueryRow(q, externalKey, externalID).
-		Scan(&cfg.MFThing, &cfg.MFKey, &cfg.Owner, &name, &content, &cfg.State); err != nil {
+	if err := cr.db.QueryRowx(q, externalID).StructScan(&dbcfg); err != nil {
 		empty := bootstrap.Config{}
 		if err == sql.ErrNoRows {
-			return empty, bootstrap.ErrNotFound
+			return empty, errors.Wrap(bootstrap.ErrNotFound, err)
 		}
-		return empty, err
+		return empty, errors.Wrap(errRetrieve, err)
 	}
 
 	q = `SELECT mainflux_channel, name, metadata FROM channels ch
-	INNER JOIN connections conn
-	ON ch.mainflux_channel = conn.channel_id AND ch.owner = conn.config_owner
-	WHERE conn.config_id = $1 AND conn.config_owner = $2`
+		 INNER JOIN connections conn
+		 ON ch.mainflux_channel = conn.channel_id AND ch.owner = conn.config_owner
+		 WHERE conn.config_id = :mainflux_thing AND conn.config_owner = :owner`
 
-	rows, err := cr.db.Query(q, cfg.MFThing, cfg.Owner)
+	rows, err := cr.db.NamedQuery(q, dbcfg)
 	if err != nil {
 		cr.log.Error(fmt.Sprintf("Failed to retrieve connected due to %s", err))
-		return bootstrap.Config{}, err
+		return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
 	}
 	defer rows.Close()
 
+	channels := []bootstrap.Channel{}
 	for rows.Next() {
-		c := bootstrap.Channel{}
-		if err := rows.Scan(&c.ID, &c.Name, &c.Metadata); err != nil {
+		dbch := dbChannel{}
+		if err := rows.StructScan(&dbch); err != nil {
 			cr.log.Error(fmt.Sprintf("Failed to read connected thing due to %s", err))
-			return bootstrap.Config{}, err
+			return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
 		}
 
-		cfg.MFChannels = append(cfg.MFChannels, c)
+		ch, err := toChannel(dbch)
+		if err != nil {
+			cr.log.Error(fmt.Sprintf("Failed to deserialize channel due to %s", err))
+			return bootstrap.Config{}, errors.Wrap(errRetrieve, err)
+		}
+
+		channels = append(channels, ch)
 	}
 
-	cfg.Content = content.String
-	cfg.Name = name.String
+	cfg := toConfig(dbcfg)
+	cfg.MFChannels = channels
 
 	return cfg, nil
 }
@@ -229,6 +253,26 @@ func (cr configRepository) Update(cfg bootstrap.Config) error {
 	name := nullString(cfg.Name)
 
 	res, err := cr.db.Exec(q, name, content, cfg.MFThing, cfg.Owner)
+	if err != nil {
+		return errors.Wrap(errUpdate, err)
+	}
+
+	cnt, err := res.RowsAffected()
+	if err != nil {
+		return errors.Wrap(errUpdate, err)
+	}
+
+	if cnt == 0 {
+		return bootstrap.ErrNotFound
+	}
+
+	return nil
+}
+
+func (cr configRepository) UpdateCert(owner, thingID, clientCert, clientKey, caCert string) error {
+	q := `UPDATE configs SET client_cert = $1, client_key = $2, ca_cert = $3 WHERE mainflux_thing = $4 AND owner = $5`
+
+	res, err := cr.db.Exec(q, clientCert, clientKey, caCert, thingID, owner)
 	if err != nil {
 		return err
 	}
@@ -245,19 +289,19 @@ func (cr configRepository) Update(cfg bootstrap.Config) error {
 	return nil
 }
 
-func (cr configRepository) UpdateConnections(key, id string, channels []bootstrap.Channel, connections []string) error {
-	tx, err := cr.db.Begin()
+func (cr configRepository) UpdateConnections(owner, id string, channels []bootstrap.Channel, connections []string) error {
+	tx, err := cr.db.Beginx()
 	if err != nil {
 		return err
 	}
 
-	if err := insertChannels(key, channels, tx); err != nil {
+	if err := insertChannels(owner, channels, tx); err != nil {
 		cr.rollback("Failed to insert Channels during the update", tx, err)
 
 		return err
 	}
 
-	if err := updateConnections(key, id, connections, tx); err != nil {
+	if err := updateConnections(owner, id, connections, tx); err != nil {
 		if e, ok := err.(*pq.Error); ok {
 			if e.Code.Name() == fkViolation && e.Constraint == connConstraintErr {
 				return bootstrap.ErrNotFound
@@ -275,10 +319,10 @@ func (cr configRepository) UpdateConnections(key, id string, channels []bootstra
 	return nil
 }
 
-func (cr configRepository) Remove(key, id string) error {
+func (cr configRepository) Remove(owner, id string) error {
 	q := `DELETE FROM configs WHERE mainflux_thing = $1 AND owner = $2`
-	if _, err := cr.db.Exec(q, id, key); err != nil {
-		return err
+	if _, err := cr.db.Exec(q, id, owner); err != nil {
+		return errors.Wrap(errRemove, err)
 	}
 
 	if _, err := cr.db.Exec(cleanupQuery); err != nil {
@@ -288,10 +332,10 @@ func (cr configRepository) Remove(key, id string) error {
 	return nil
 }
 
-func (cr configRepository) ChangeState(key, id string, state bootstrap.State) error {
+func (cr configRepository) ChangeState(owner, id string, state bootstrap.State) error {
 	q := `UPDATE configs SET state = $1 WHERE mainflux_thing = $2 AND owner = $3;`
 
-	res, err := cr.db.Exec(q, state, id, key)
+	res, err := cr.db.Exec(q, state, id, owner)
 	if err != nil {
 		return err
 	}
@@ -308,20 +352,29 @@ func (cr configRepository) ChangeState(key, id string, state bootstrap.State) er
 	return nil
 }
 
-func (cr configRepository) ListExisting(key string, ids []string) ([]bootstrap.Channel, error) {
-	q := "SELECT mainflux_channel, name, metadata FROM channels WHERE owner = $1 AND mainflux_channel = ANY ($2)"
+func (cr configRepository) ListExisting(owner string, ids []string) ([]bootstrap.Channel, error) {
+	var channels []bootstrap.Channel
+	if len(ids) == 0 {
+		return channels, nil
+	}
 
-	rows, err := cr.db.Query(q, key, pq.Array(ids))
+	q := "SELECT mainflux_channel, name, metadata FROM channels WHERE owner = $1 AND mainflux_channel = ANY ($2)"
+	rows, err := cr.db.Queryx(q, owner, pq.Array(ids))
 	if err != nil {
 		return []bootstrap.Channel{}, err
 	}
 
-	var channels []bootstrap.Channel
 	for rows.Next() {
-		var ch bootstrap.Channel
-		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Metadata); err != nil {
+		var dbch dbChannel
+		if err := rows.StructScan(&dbch); err != nil {
 			cr.log.Error(fmt.Sprintf("Failed to read retrieved channels due to %s", err))
-			return []bootstrap.Channel{}, nil
+			return []bootstrap.Channel{}, err
+		}
+
+		ch, err := toChannel(dbch)
+		if err != nil {
+			cr.log.Error(fmt.Sprintf("Failed to deserialize channel due to %s", err))
+			return []bootstrap.Channel{}, err
 		}
 
 		channels = append(channels, ch)
@@ -330,55 +383,6 @@ func (cr configRepository) ListExisting(key string, ids []string) ([]bootstrap.C
 	return channels, nil
 }
 
-func (cr configRepository) SaveUnknown(key, id string) error {
-	q := `INSERT INTO unknown_configs (external_id, external_key) VALUES ($1, $2)`
-
-	if _, err := cr.db.Exec(q, id, key); err != nil {
-		if pqErr, ok := err.(*pq.Error); ok && pqErr.Code.Name() == duplicateErr {
-			return nil
-		}
-		return err
-	}
-
-	return nil
-}
-
-func (cr configRepository) RetrieveUnknown(offset, limit uint64) bootstrap.ConfigsPage {
-	q := `SELECT external_id, external_key FROM unknown_configs LIMIT $1 OFFSET $2`
-	rows, err := cr.db.Query(q, limit, offset)
-	if err != nil {
-		cr.log.Error(fmt.Sprintf("Failed to retrieve config due to %s", err))
-		return bootstrap.ConfigsPage{}
-	}
-	defer rows.Close()
-
-	items := []bootstrap.Config{}
-	for rows.Next() {
-		c := bootstrap.Config{}
-		if err := rows.Scan(&c.ExternalID, &c.ExternalKey); err != nil {
-			cr.log.Error(fmt.Sprintf("Failed to read retrieved config due to %s", err))
-			return bootstrap.ConfigsPage{}
-		}
-
-		items = append(items, c)
-	}
-
-	q = fmt.Sprintf(`SELECT COUNT(*) FROM unknown_configs`)
-
-	var total uint64
-	if err := cr.db.QueryRow(q).Scan(&total); err != nil {
-		cr.log.Error(fmt.Sprintf("Failed to count unknown configs due to %s", err))
-		return bootstrap.ConfigsPage{}
-	}
-
-	return bootstrap.ConfigsPage{
-		Total:   total,
-		Offset:  offset,
-		Limit:   limit,
-		Configs: items,
-	}
-}
-
 func (cr configRepository) RemoveThing(id string) error {
 	q := `DELETE FROM configs WHERE mainflux_thing = $1`
 	_, err := cr.db.Exec(q, id)
@@ -386,38 +390,48 @@ func (cr configRepository) RemoveThing(id string) error {
 	if _, err := cr.db.Exec(cleanupQuery); err != nil {
 		cr.log.Warn("Failed to clean dangling channels after removal")
 	}
-
-	return err
+	if err != nil {
+		return errors.Wrap(errRemove, err)
+	}
+	return nil
 }
 
-func (cr configRepository) UpdateChannel(channel bootstrap.Channel) error {
-	q := `UPDATE channels SET name = $1, metadata = $2 WHERE mainflux_channel = $3`
-	_, err := cr.db.Exec(q, channel.Name, channel.Metadata, channel.ID)
+func (cr configRepository) UpdateChannel(c bootstrap.Channel) error {
+	dbch, err := toDBChannel("", c)
+	if err != nil {
+		return err
+	}
 
-	return err
+	q := `UPDATE channels SET name = :name, metadata = :metadata WHERE mainflux_channel = :mainflux_channel`
+	if _, err = cr.db.NamedExec(q, dbch); err != nil {
+		return errors.Wrap(errUpdateChannels, err)
+	}
+	return nil
 }
 
 func (cr configRepository) RemoveChannel(id string) error {
 	q := `DELETE FROM channels WHERE mainflux_channel = $1`
-	_, err := cr.db.Exec(q, id)
-
-	return err
+	if _, err := cr.db.Exec(q, id); err != nil {
+		return errors.Wrap(errRemoveChannels, err)
+	}
+	return nil
 }
 
 func (cr configRepository) DisconnectThing(channelID, thingID string) error {
 	q := `UPDATE configs SET state = $1 WHERE EXISTS (
 		SELECT 1 FROM connections WHERE config_id = $2 AND channel_id = $3)`
-	_, err := cr.db.Exec(q, bootstrap.Inactive, thingID, channelID)
-
-	return err
+	if _, err := cr.db.Exec(q, bootstrap.Inactive, thingID, channelID); err != nil {
+		return errors.Wrap(errDisconnectThing, err)
+	}
+	return nil
 }
 
-func (cr configRepository) retrieveAll(key string, filter bootstrap.Filter) (string, []interface{}) {
+func (cr configRepository) retrieveAll(owner string, filter bootstrap.Filter) (string, []interface{}) {
 	template := `WHERE owner = $1 %s`
-	params := []interface{}{key}
+	params := []interface{}{owner}
 	// One empty string so that strings Join works if only one filter is applied.
 	queries := []string{""}
-	// Since key is the first param, start from 2.
+	// Since owner is the first param, start from 2.
 	counter := 2
 	for k, v := range filter.FullMatch {
 		queries = append(queries, fmt.Sprintf("%s = $%d", k, counter))
@@ -435,7 +449,7 @@ func (cr configRepository) retrieveAll(key string, filter bootstrap.Filter) (str
 	return fmt.Sprintf(template, f), params
 }
 
-func (cr configRepository) rollback(content string, tx *sql.Tx, err error) {
+func (cr configRepository) rollback(content string, tx *sqlx.Tx, err error) {
 	cr.log.Error(fmt.Sprintf("%s %s", content, err))
 
 	if err := tx.Rollback(); err != nil {
@@ -443,24 +457,23 @@ func (cr configRepository) rollback(content string, tx *sql.Tx, err error) {
 	}
 }
 
-func insertChannels(key string, channels []bootstrap.Channel, tx *sql.Tx) error {
+func insertChannels(owner string, channels []bootstrap.Channel, tx *sqlx.Tx) error {
 	if len(channels) == 0 {
 		return nil
 	}
 
-	q := `INSERT INTO channels (mainflux_channel, owner, name, metadata) VALUES `
-	v := []interface{}{key}
-	var vals []string
-	// Since the first value is owner, start with the second one.
-	count := 2
+	var chans []dbChannel
 	for _, ch := range channels {
-		vals = append(vals, fmt.Sprintf("($%d, $1, $%d, $%d)", count, count+1, count+2))
-		v = append(v, ch.ID, ch.Name, ch.Metadata)
-		count += chanFieldsNum
+		dbch, err := toDBChannel(owner, ch)
+		if err != nil {
+			return err
+		}
+		chans = append(chans, dbch)
 	}
 
-	q = fmt.Sprintf("%s%s", q, strings.Join(vals, ","))
-	if _, err := tx.Exec(q, v...); err != nil {
+	q := `INSERT INTO channels (mainflux_channel, owner, name, metadata)
+		  VALUES (:mainflux_channel, :owner, :name, :metadata)`
+	if _, err := tx.NamedExec(q, chans); err != nil {
 		e := err
 		if pqErr, ok := err.(*pq.Error); ok && pqErr.Code.Name() == duplicateErr {
 			e = bootstrap.ErrConflict
@@ -471,44 +484,38 @@ func insertChannels(key string, channels []bootstrap.Channel, tx *sql.Tx) error
 	return nil
 }
 
-func insertConnections(cfg bootstrap.Config, connections []string, tx *sql.Tx) error {
+func insertConnections(cfg bootstrap.Config, connections []string, tx *sqlx.Tx) error {
 	if len(connections) == 0 {
 		return nil
 	}
 
-	q := `INSERT INTO connections (config_id, channel_id, config_owner, channel_owner) VALUES`
-	v := []interface{}{cfg.MFThing, cfg.Owner}
-	var vals []string
-
-	// Since the first value is Config ID and the second and third
-	// are Config owner, start with  the second one.
-	count := 3
-	for _, id := range connections {
-		vals = append(vals, fmt.Sprintf("($1, $%d, $2, $2)", count))
-		v = append(v, id)
-		count++
+	q := `INSERT INTO connections (config_id, channel_id, config_owner, channel_owner)
+		  VALUES (:config_id, :channel_id, :config_owner, :channel_owner)`
+	conns := []dbConnection{}
+	for _, conn := range connections {
+		dbconn := dbConnection{
+			Config:       cfg.MFThing,
+			Channel:      conn,
+			ConfigOwner:  cfg.Owner,
+			ChannelOwner: cfg.Owner,
+		}
+		conns = append(conns, dbconn)
 	}
-
-	q = fmt.Sprintf("%s%s", q, strings.Join(vals, ","))
-	_, err := tx.Exec(q, v...)
+	_, err := tx.NamedExec(q, conns)
 
 	return err
 }
 
-func updateConnections(key, id string, connections []string, tx *sql.Tx) error {
+func updateConnections(owner, id string, connections []string, tx *sqlx.Tx) error {
 	if len(connections) == 0 {
 		return nil
 	}
 
 	q := `DELETE FROM connections
-	WHERE config_id = $1 AND config_owner = $2 AND channel_owner = $2
-	AND channel_id NOT IN ($3)`
-
-	v := []interface{}{id, key}
-	v = append(v, pq.Array(connections))
-
-	res, err := tx.Exec(q, v...)
+		  WHERE config_id = $1 AND config_owner = $2 AND channel_owner = $2
+		  AND channel_id NOT IN ($3)`
 
+	res, err := tx.Exec(q, id, owner, pq.Array(connections))
 	if err != nil {
 		return err
 	}
@@ -518,22 +525,21 @@ func updateConnections(key, id string, connections []string, tx *sql.Tx) error {
 		return err
 	}
 
-	q = `INSERT INTO connections (config_id, channel_id, config_owner, channel_owner) VALUES`
-	v = []interface{}{id, key}
-	var vals []string
+	q = `INSERT INTO connections (config_id, channel_id, config_owner, channel_owner)
+		 VALUES (:config_id, :channel_id, :config_owner, :channel_owner)`
 
-	// Since the first value is Config ID and the second is Config
-	// owner, start with the third one.
-	count := 3
-	for _, chID := range connections {
-		vals = append(vals, fmt.Sprintf("($1, $%d, $2, $2)", count))
-		v = append(v, chID)
-		count++
+	conns := []dbConnection{}
+	for _, conn := range connections {
+		dbconn := dbConnection{
+			Config:       id,
+			Channel:      conn,
+			ConfigOwner:  owner,
+			ChannelOwner: owner,
+		}
+		conns = append(conns, dbconn)
 	}
 
-	// Add connections for current list of channels. Ignore if already exists.
-	q = fmt.Sprintf("%s%s%s", q, strings.Join(vals, ","), "ON CONFLICT (config_id, config_owner, channel_id, channel_owner) DO NOTHING")
-	if _, err := tx.Exec(q, v...); err != nil {
+	if _, err := tx.NamedExec(q, conns); err != nil {
 		return err
 	}
 
@@ -556,3 +562,111 @@ func nullString(s string) sql.NullString {
 		Valid:  true,
 	}
 }
+
+type dbConfig struct {
+	MFThing     string          `db:"mainflux_thing"`
+	Owner       string          `db:"owner"`
+	Name        sql.NullString  `db:"name"`
+	ClientCert  sql.NullString  `db:"client_cert"`
+	ClientKey   sql.NullString  `db:"client_key"`
+	CaCert      sql.NullString  `db:"ca_cert"`
+	MFKey       string          `db:"mainflux_key"`
+	ExternalID  string          `db:"external_id"`
+	ExternalKey string          `db:"external_key"`
+	Content     sql.NullString  `db:"content"`
+	State       bootstrap.State `db:"state"`
+}
+
+func toDBConfig(cfg bootstrap.Config) dbConfig {
+	return dbConfig{
+		MFThing:     cfg.MFThing,
+		Owner:       cfg.Owner,
+		Name:        nullString(cfg.Name),
+		ClientCert:  nullString(cfg.ClientCert),
+		ClientKey:   nullString(cfg.ClientKey),
+		CaCert:      nullString(cfg.CACert),
+		MFKey:       cfg.MFKey,
+		ExternalID:  cfg.ExternalID,
+		ExternalKey: cfg.ExternalKey,
+		Content:     nullString(cfg.Content),
+		State:       cfg.State,
+	}
+}
+
+func toConfig(dbcfg dbConfig) bootstrap.Config {
+	cfg := bootstrap.Config{
+		MFThing:     dbcfg.MFThing,
+		Owner:       dbcfg.Owner,
+		MFKey:       dbcfg.MFKey,
+		ExternalID:  dbcfg.ExternalID,
+		ExternalKey: dbcfg.ExternalKey,
+		State:       dbcfg.State,
+	}
+
+	if dbcfg.Name.Valid {
+		cfg.Name = dbcfg.Name.String
+	}
+
+	if dbcfg.Content.Valid {
+		cfg.Content = dbcfg.Content.String
+	}
+
+	if dbcfg.ClientCert.Valid {
+		cfg.ClientCert = dbcfg.ClientCert.String
+	}
+
+	if dbcfg.ClientKey.Valid {
+		cfg.ClientKey = dbcfg.ClientKey.String
+	}
+
+	if dbcfg.CaCert.Valid {
+		cfg.CACert = dbcfg.CaCert.String
+	}
+	return cfg
+}
+
+type dbChannel struct {
+	ID       string         `db:"mainflux_channel"`
+	Name     sql.NullString `db:"name"`
+	Owner    sql.NullString `db:"owner"`
+	Metadata string         `db:"metadata"`
+}
+
+func toDBChannel(owner string, ch bootstrap.Channel) (dbChannel, error) {
+	dbch := dbChannel{
+		ID:    ch.ID,
+		Name:  nullString(ch.Name),
+		Owner: nullString(owner),
+	}
+
+	metadata, err := json.Marshal(ch.Metadata)
+	if err != nil {
+		return dbChannel{}, errors.Wrap(errMarshalChannel, err)
+	}
+
+	dbch.Metadata = string(metadata)
+	return dbch, nil
+}
+
+func toChannel(dbch dbChannel) (bootstrap.Channel, error) {
+	ch := bootstrap.Channel{
+		ID: dbch.ID,
+	}
+
+	if dbch.Name.Valid {
+		ch.Name = dbch.Name.String
+	}
+
+	if err := json.Unmarshal([]byte(dbch.Metadata), &ch.Metadata); err != nil {
+		return bootstrap.Channel{}, errors.Wrap(errUnmarshalChannel, err)
+	}
+
+	return ch, nil
+}
+
+type dbConnection struct {
+	Config       string `db:"config_id"`
+	Channel      string `db:"channel_id"`
+	ConfigOwner  string `db:"config_owner"`
+	ChannelOwner string `db:"channel_owner"`
+}

bootstrap/postgres/configs_test.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package postgres_test
 
@@ -12,9 +8,10 @@ import (
 	"strconv"
 	"testing"
 
+	"github.com/gofrs/uuid"
 	"github.com/mainflux/mainflux/bootstrap"
 	"github.com/mainflux/mainflux/bootstrap/postgres"
-	uuid "github.com/satori/go.uuid"
+	"github.com/mainflux/mainflux/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -29,8 +26,8 @@ var (
 		ExternalKey: "external-key",
 		Owner:       "user@email.com",
 		MFChannels: []bootstrap.Channel{
-			bootstrap.Channel{ID: "1", Name: "name 1", Metadata: "{\"meta\":1}"},
-			bootstrap.Channel{ID: "2", Name: "name 2", Metadata: "{\"meta\":2}"},
+			bootstrap.Channel{ID: "1", Name: "name 1", Metadata: map[string]interface{}{"meta": 1.0}},
+			bootstrap.Channel{ID: "2", Name: "name 2", Metadata: map[string]interface{}{"meta": 2.0}},
 		},
 		Content: "content",
 		State:   bootstrap.Inactive,
@@ -94,7 +91,7 @@ func TestSave(t *testing.T) {
 	}
 	for _, tc := range cases {
 		_, err := repo.Save(tc.config, tc.connections)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -105,13 +102,18 @@ func TestRetrieveByID(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
-	id, err = repo.Save(c, channels)
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
+	id, err := repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	nonexistentConfID, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+
 	cases := []struct {
 		desc  string
 		owner string
@@ -133,7 +135,7 @@ func TestRetrieveByID(t *testing.T) {
 		{
 			desc:  "retrieve a non-existing config",
 			owner: c.Owner,
-			id:    uuid.NewV4().String(),
+			id:    nonexistentConfID.String(),
 			err:   bootstrap.ErrNotFound,
 		},
 		{
@@ -145,7 +147,7 @@ func TestRetrieveByID(t *testing.T) {
 	}
 	for _, tc := range cases {
 		_, err := repo.RetrieveByID(tc.owner, tc.id)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -157,11 +159,13 @@ func TestRetrieveAll(t *testing.T) {
 	for i := 0; i < numConfigs; i++ {
 		c := config
 		// Use UUID to prevent conflict errors.
-		id := uuid.NewV4().String()
-		c.ExternalID = id
+
+		uid, err := uuid.NewV4()
+		require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+		c.ExternalID = uid.String()
 		c.Name = fmt.Sprintf("name %d", i)
-		c.MFThing = id
-		c.MFKey = id
+		c.MFThing = uid.String()
+		c.MFKey = uid.String()
 
 		if i%2 == 0 {
 			c.State = bootstrap.Active
@@ -171,7 +175,7 @@ func TestRetrieveAll(t *testing.T) {
 			c.MFChannels = nil
 		}
 
-		_, err := repo.Save(c, channels)
+		_, err = repo.Save(c, channels)
 		require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 	}
 
@@ -235,42 +239,34 @@ func TestRetrieveByExternalID(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
 	cases := []struct {
-		desc        string
-		externalID  string
-		externalKey string
-		err         error
+		desc       string
+		externalID string
+		err        error
 	}{
 		{
-			desc:        "retrieve with invalid external ID",
-			externalID:  strconv.Itoa(numConfigs + 1),
-			externalKey: config.ExternalKey,
-			err:         bootstrap.ErrNotFound,
+			desc:       "retrieve with invalid external ID",
+			externalID: strconv.Itoa(numConfigs + 1),
+			err:        bootstrap.ErrNotFound,
 		},
 		{
-			desc:        "retrieve with invalid external key",
-			externalID:  c.ExternalID,
-			externalKey: "invalid",
-			err:         bootstrap.ErrNotFound,
-		},
-		{
-			desc:        "retrieve with external key",
-			externalID:  c.ExternalID,
-			externalKey: c.ExternalKey,
-			err:         nil,
+			desc:       "retrieve with external key",
+			externalID: c.ExternalID,
+			err:        nil,
 		},
 	}
 	for _, tc := range cases {
-		_, err := repo.RetrieveByExternalID(tc.externalKey, tc.externalID)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		_, err := repo.RetrieveByExternalID(tc.externalID)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -281,11 +277,12 @@ func TestUpdate(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
@@ -314,7 +311,63 @@ func TestUpdate(t *testing.T) {
 	}
 	for _, tc := range cases {
 		err := repo.Update(tc.config)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+
+func TestUpdateCert(t *testing.T) {
+	repo := postgres.NewConfigRepository(db, testLog)
+	err := deleteChannels(repo)
+	require.Nil(t, err, "Channels cleanup expected to succeed.")
+
+	c := config
+	// Use UUID to prevent conflicts.
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
+	_, err = repo.Save(c, channels)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	c.Content = "new content"
+	c.Name = "new name"
+
+	wrongOwner := c
+	wrongOwner.Owner = "3"
+
+	cases := []struct {
+		desc    string
+		thingID string
+		owner   string
+		cert    string
+		certKey string
+		ca      string
+		err     error
+	}{
+		{
+			desc:    "update with wrong owner",
+			thingID: "",
+			cert:    "cert",
+			certKey: "certKey",
+			ca:      "",
+			owner:   "wrong",
+			err:     bootstrap.ErrNotFound,
+		},
+		{
+			desc:    "update a config",
+			thingID: c.MFThing,
+			cert:    "cert",
+			certKey: "certKey",
+			ca:      "ca",
+			owner:   c.Owner,
+			err:     nil,
+		},
+	}
+	for _, tc := range cases {
+		err := repo.UpdateCert(tc.owner, tc.thingID, tc.cert, tc.certKey, tc.ca)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -325,26 +378,28 @@ func TestUpdateConnections(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 	// Use UUID to prevent conflicts.
-	id = uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err = uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	c.MFChannels = []bootstrap.Channel{}
-	_, err = repo.Save(c, []string{channels[0]})
+	c2, err := repo.Save(c, []string{channels[0]})
 	require.Nil(t, err, fmt.Sprintf("Saving a config expected to succeed: %s.\n", err))
 
 	cases := []struct {
 		desc        string
-		key         string
+		owner       string
 		id          string
 		channels    []bootstrap.Channel
 		connections []string
@@ -352,7 +407,7 @@ func TestUpdateConnections(t *testing.T) {
 	}{
 		{
 			desc:        "update connections of non-existing config",
-			key:         config.Owner,
+			owner:       config.Owner,
 			id:          "unknown",
 			channels:    nil,
 			connections: []string{channels[1]},
@@ -360,15 +415,23 @@ func TestUpdateConnections(t *testing.T) {
 		},
 		{
 			desc:        "update connections",
-			key:         config.Owner,
+			owner:       config.Owner,
 			id:          c.MFThing,
 			channels:    nil,
 			connections: []string{channels[1]},
 			err:         nil,
 		},
+		{
+			desc:        "update connections with existing channels",
+			owner:       config.Owner,
+			id:          c2,
+			channels:    nil,
+			connections: channels,
+			err:         nil,
+		},
 		{
 			desc:        "update connections no channels",
-			key:         config.Owner,
+			owner:       config.Owner,
 			id:          c.MFThing,
 			channels:    nil,
 			connections: nil,
@@ -376,8 +439,8 @@ func TestUpdateConnections(t *testing.T) {
 		},
 	}
 	for _, tc := range cases {
-		err := repo.UpdateConnections(tc.key, tc.id, tc.channels, tc.connections)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		err := repo.UpdateConnections(tc.owner, tc.id, tc.channels, tc.connections)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -388,12 +451,13 @@ func TestRemove(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
-	id, err = repo.Save(c, channels)
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
+	id, err := repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
 	// Removal works the same for both existing and non-existing
@@ -403,7 +467,7 @@ func TestRemove(t *testing.T) {
 		require.Nil(t, err, fmt.Sprintf("%d: failed to remove config due to: %s", i, err))
 
 		_, err = repo.RetrieveByID(c.Owner, id)
-		require.Equal(t, bootstrap.ErrNotFound, err, fmt.Sprintf("%d: expected %s got %s", i, bootstrap.ErrNotFound, err))
+		require.True(t, errors.Contains(err, bootstrap.ErrNotFound), fmt.Sprintf("%d: expected %s got %s", i, bootstrap.ErrNotFound, err))
 	}
 }
 
@@ -414,11 +478,12 @@ func TestChangeState(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	saved, err := repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
@@ -437,7 +502,7 @@ func TestChangeState(t *testing.T) {
 		},
 		{
 			desc:  "change state with wrong id",
-			id:    uuid.NewV4().String(),
+			id:    "wrong",
 			owner: c.Owner,
 			err:   bootstrap.ErrNotFound,
 		},
@@ -458,7 +523,7 @@ func TestChangeState(t *testing.T) {
 	}
 	for _, tc := range cases {
 		err := repo.ChangeState(tc.owner, tc.id, tc.state)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -469,114 +534,52 @@ func TestListExisting(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
 	var chs []bootstrap.Channel
 	for _, ch := range config.MFChannels {
-		ch.Metadata = []byte(ch.Metadata.(string))
 		chs = append(chs, ch)
 	}
 
 	cases := []struct {
 		desc        string
-		key         string
+		owner       string
 		connections []string
 		existing    []bootstrap.Channel
 	}{
 		{
 			desc:        "list all existing channels",
-			key:         c.Owner,
+			owner:       c.Owner,
 			connections: channels,
 			existing:    chs,
 		},
 		{
 			desc:        "list a subset of existing channels",
-			key:         c.Owner,
+			owner:       c.Owner,
 			connections: []string{channels[0], "5"},
 			existing:    []bootstrap.Channel{chs[0]},
 		},
 		{
 			desc:        "list a subset of existing channels empty",
-			key:         c.Owner,
+			owner:       c.Owner,
 			connections: []string{"5", "6"},
 			existing:    []bootstrap.Channel{},
 		},
 	}
 	for _, tc := range cases {
-		existing, err := repo.ListExisting(tc.key, tc.connections)
+		existing, err := repo.ListExisting(tc.owner, tc.connections)
 		assert.Nil(t, err, fmt.Sprintf("%s: unexpected error: %s", tc.desc, err))
 		assert.ElementsMatch(t, tc.existing, existing, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.existing, existing))
 	}
 }
 
-func TestSaveUnknown(t *testing.T) {
-	repo := postgres.NewConfigRepository(db, testLog)
-
-	cases := []struct {
-		desc        string
-		externalID  string
-		externalKey string
-		err         error
-	}{
-		{
-			desc:        "save unknown",
-			externalID:  uuid.NewV4().String(),
-			externalKey: uuid.NewV4().String(),
-			err:         nil,
-		},
-		{
-			desc:        "save invalid unknown",
-			externalID:  uuid.NewV4().String(),
-			externalKey: "",
-			err:         nil,
-		},
-	}
-	for _, tc := range cases {
-		err := repo.SaveUnknown(tc.externalKey, tc.externalID)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
-	}
-}
-
-func TestRetrieveUnknown(t *testing.T) {
-	repo := postgres.NewConfigRepository(db, testLog)
-
-	for i := 0; i < numConfigs; i++ {
-		id := uuid.NewV4().String()
-		repo.SaveUnknown(id, id)
-	}
-
-	cases := []struct {
-		desc   string
-		offset uint64
-		limit  uint64
-		size   int
-	}{
-		{
-			desc:   "retrieve all",
-			offset: 0,
-			limit:  uint64(numConfigs),
-			size:   numConfigs,
-		},
-		{
-			desc:   "retrieve a subset",
-			offset: 5,
-			limit:  uint64(numConfigs - 5),
-			size:   numConfigs - 5,
-		},
-	}
-	for _, tc := range cases {
-		ret := repo.RetrieveUnknown(tc.offset, tc.limit)
-		size := len(ret.Configs)
-		assert.Equal(t, tc.size, size, fmt.Sprintf("%s: expected %d got %d\n", tc.desc, tc.size, size))
-	}
-}
-
 func TestRemoveThing(t *testing.T) {
 	repo := postgres.NewConfigRepository(db, testLog)
 	err := deleteChannels(repo)
@@ -584,11 +587,12 @@ func TestRemoveThing(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	saved, err := repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 	for i := 0; i < 2; i++ {
@@ -604,19 +608,20 @@ func TestUpdateChannel(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
-	id = c.MFChannels[0].ID
+	id := c.MFChannels[0].ID
 	update := bootstrap.Channel{
 		ID:       id,
 		Name:     "update name",
-		Metadata: []byte("{\"update\":\"metadata update\"}"),
+		Metadata: map[string]interface{}{"update": "metadata update"},
 	}
 	err = repo.UpdateChannel(update)
 	assert.Nil(t, err, fmt.Sprintf("updating config expected to succeed: %s.\n", err))
@@ -640,16 +645,12 @@ func TestRemoveChannel(t *testing.T) {
 	require.Nil(t, err, "Channels cleanup expected to succeed.")
 
 	c := config
-	for i, ch := range c.MFChannels {
-		c.MFChannels[i].Metadata = []byte(ch.Metadata.(string))
-
-	}
-	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	_, err = repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
@@ -668,11 +669,12 @@ func TestDisconnectThing(t *testing.T) {
 
 	c := config
 	// Use UUID to prevent conflicts.
-	id := uuid.NewV4().String()
-	c.MFKey = id
-	c.MFThing = id
-	c.ExternalID = id
-	c.ExternalKey = id
+	uid, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.MFKey = uid.String()
+	c.MFThing = uid.String()
+	c.ExternalID = uid.String()
+	c.ExternalKey = uid.String()
 	saved, err := repo.Save(c, channels)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 

bootstrap/postgres/doc.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 // Package postgres contains repository implementations using PostgreSQL as
 // the underlying database.

bootstrap/postgres/init.go

@@ -1,16 +1,12 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package postgres
 
 import (
-	"database/sql"
 	"fmt"
 
+	"github.com/jmoiron/sqlx"
 	_ "github.com/lib/pq" // required for SQL access
 	migrate "github.com/rubenv/sql-migrate"
 )
@@ -31,10 +27,10 @@ type Config struct {
 // Connect creates a connection to the PostgreSQL instance and applies any
 // unapplied database migrations. A non-nil error is returned to indicate
 // failure.
-func Connect(cfg Config) (*sql.DB, error) {
+func Connect(cfg Config) (*sqlx.DB, error) {
 	url := fmt.Sprintf("host=%s port=%s user=%s dbname=%s password=%s sslmode=%s sslcert=%s sslkey=%s sslrootcert=%s", cfg.Host, cfg.Port, cfg.User, cfg.Name, cfg.Pass, cfg.SSLMode, cfg.SSLCert, cfg.SSLKey, cfg.SSLRootCert)
 
-	db, err := sql.Open("postgres", url)
+	db, err := sqlx.Open("postgres", url)
 	if err != nil {
 		return nil, err
 	}
@@ -46,7 +42,7 @@ func Connect(cfg Config) (*sql.DB, error) {
 	return db, nil
 }
 
-func migrateDB(db *sql.DB) error {
+func migrateDB(db *sqlx.DB) error {
 	migrations := &migrate.MemoryMigrationSource{
 		Migrations: []*migrate.Migration{
 			{
@@ -60,6 +56,9 @@ func migrateDB(db *sql.DB) error {
 						external_id    TEXT UNIQUE NOT NULL,
 						external_key   TEXT NOT NULL,
 						content  	   TEXT,
+						client_cert	   TEXT,
+						client_key 	   TEXT,
+						ca_cert 	   TEXT,
 						state          BIGINT NOT NULL,
 						PRIMARY KEY (mainflux_thing, owner)
 					)`,
@@ -92,10 +91,19 @@ func migrateDB(db *sql.DB) error {
 					"DROP TABLE unknown_configs",
 				},
 			},
+			{
+				Id: "configs_2",
+				Up: []string{
+					"DROP TABLE IF EXISTS unknown_configs",
+				},
+				Down: []string{
+					"CREATE TABLE IF NOT EXISTS unknown_configs",
+				},
+			},
 		},
 	}
 
-	_, err := migrate.Exec(db, "postgres", migrations, migrate.Up)
+	_, err := migrate.Exec(db.DB, "postgres", migrations, migrate.Up)
 
 	return err
 }

bootstrap/postgres/setup_test.go

@@ -1,22 +1,18 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package postgres_test
 
 import (
-	"database/sql"
 	"fmt"
 	"log"
 	"os"
 	"testing"
 
+	"github.com/jmoiron/sqlx"
 	"github.com/mainflux/mainflux/bootstrap/postgres"
 	"github.com/mainflux/mainflux/logger"
-	"gopkg.in/ory-am/dockertest.v3"
+	dockertest "github.com/ory/dockertest/v3"
 )
 
 const (
@@ -26,7 +22,7 @@ const (
 
 var (
 	testLog, _ = logger.New(os.Stdout, logger.Info.String())
-	db         *sql.DB
+	db         *sqlx.DB
 )
 
 func TestMain(m *testing.M) {
@@ -49,7 +45,7 @@ func TestMain(m *testing.M) {
 
 	if err := pool.Retry(func() error {
 		url := fmt.Sprintf("host=localhost port=%s user=test dbname=test password=test sslmode=disable", port)
-		db, err = sql.Open("postgres", url)
+		db, err = sqlx.Open("postgres", url)
 		if err != nil {
 			return err
 		}
@@ -73,10 +69,11 @@ func TestMain(m *testing.M) {
 	if db, err = postgres.Connect(dbConfig); err != nil {
 		log.Fatalf("Could not setup test DB connection: %s", err)
 	}
-	defer db.Close()
 
 	code := m.Run()
 
+	// Defers will not be run when using os.Exit
+	db.Close()
 	if err := pool.Purge(container); err != nil {
 		log.Fatalf("Could not purge container: %s", err)
 	}

bootstrap/reader.go

@@ -1,17 +1,15 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package bootstrap
 
 import (
-	"errors"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"encoding/json"
+	"io"
 	"net/http"
-
-	"github.com/mainflux/mainflux"
 )
 
 // bootstrapRes represent Mainflux Response to the Bootatrap request.
@@ -21,7 +19,10 @@ type bootstrapRes struct {
 	MFThing    string       `json:"mainflux_id"`
 	MFKey      string       `json:"mainflux_key"`
 	MFChannels []channelRes `json:"mainflux_channels"`
-	Content    string       `json:"content"`
+	Content    string       `json:"content,omitempty"`
+	ClientCert string       `json:"client_cert,omitempty"`
+	ClientKey  string       `json:"client_key,omitempty"`
+	CACert     string       `json:"ca_cert,omitempty"`
 }
 
 type channelRes struct {
@@ -42,19 +43,17 @@ func (res bootstrapRes) Empty() bool {
 	return false
 }
 
-type reader struct{}
+type reader struct {
+	encKey []byte
+}
 
 // NewConfigReader return new reader which is used to generate response
 // from the config.
-func NewConfigReader() ConfigReader {
-	return reader{}
+func NewConfigReader(encKey []byte) ConfigReader {
+	return reader{encKey: encKey}
 }
 
-func (r reader) ReadConfig(cfg Config) (mainflux.Response, error) {
-	if len(cfg.MFChannels) < 1 {
-		return bootstrapRes{}, errors.New("Invalid configuration")
-	}
-
+func (r reader) ReadConfig(cfg Config, secure bool) (interface{}, error) {
 	var channels []channelRes
 	for _, ch := range cfg.MFChannels {
 		channels = append(channels, channelRes{ID: ch.ID, Name: ch.Name, Metadata: ch.Metadata})
@@ -65,7 +64,32 @@ func (r reader) ReadConfig(cfg Config) (mainflux.Response, error) {
 		MFThing:    cfg.MFThing,
 		MFChannels: channels,
 		Content:    cfg.Content,
+		ClientCert: cfg.ClientCert,
+		ClientKey:  cfg.ClientKey,
+		CACert:     cfg.CACert,
+	}
+	if secure {
+		b, err := json.Marshal(res)
+		if err != nil {
+			return nil, err
+		}
+		return r.encrypt(b)
 	}
 
 	return res, nil
 }
+
+func (r reader) encrypt(in []byte) ([]byte, error) {
+	block, err := aes.NewCipher(r.encKey)
+	if err != nil {
+		return nil, err
+	}
+	ciphertext := make([]byte, aes.BlockSize+len(in))
+	iv := ciphertext[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		return nil, err
+	}
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(ciphertext[aes.BlockSize:], in)
+	return ciphertext, nil
+}

bootstrap/reader_test.go

@@ -0,0 +1,126 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package bootstrap_test
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/bootstrap"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type readChan struct {
+	ID       string      `json:"id"`
+	Name     string      `json:"name,omitempty"`
+	Metadata interface{} `json:"metadata,omitempty"`
+}
+
+type readResp struct {
+	MFThing    string     `json:"mainflux_id"`
+	MFKey      string     `json:"mainflux_key"`
+	MFChannels []readChan `json:"mainflux_channels"`
+	Content    string     `json:"content,omitempty"`
+	ClientCert string     `json:"client_cert,omitempty"`
+	ClientKey  string     `json:"client_key,omitempty"`
+	CACert     string     `json:"ca_cert,omitempty"`
+}
+
+func dec(in []byte) ([]byte, error) {
+	block, err := aes.NewCipher(encKey)
+	if err != nil {
+		return nil, err
+	}
+	if len(in) < aes.BlockSize {
+		return nil, bootstrap.ErrMalformedEntity
+	}
+	iv := in[:aes.BlockSize]
+	in = in[aes.BlockSize:]
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(in, in)
+	return in, nil
+}
+
+func TestReadConfig(t *testing.T) {
+	cfg := bootstrap.Config{
+		MFThing:    "mf_id",
+		ClientCert: "client_cert",
+		ClientKey:  "client_key",
+		CACert:     "ca_cert",
+		MFKey:      "mf_key",
+		MFChannels: []bootstrap.Channel{
+			bootstrap.Channel{
+				ID:       "mf_id",
+				Name:     "mf_name",
+				Metadata: map[string]interface{}{"key": "value}"},
+			},
+		},
+		Content: "content",
+	}
+	ret := readResp{
+		MFThing: "mf_id",
+		MFKey:   "mf_key",
+		MFChannels: []readChan{
+			{
+				ID:       "mf_id",
+				Name:     "mf_name",
+				Metadata: map[string]interface{}{"key": "value}"},
+			},
+		},
+		Content:    "content",
+		ClientCert: "client_cert",
+		ClientKey:  "client_key",
+		CACert:     "ca_cert",
+	}
+
+	bin, err := json.Marshal(ret)
+	require.Nil(t, err, fmt.Sprintf("Marshalling expected to succeed: %s.\n", err))
+
+	reader := bootstrap.NewConfigReader(encKey)
+	cases := []struct {
+		desc   string
+		config bootstrap.Config
+		enc    []byte
+		secret bool
+		err    error
+	}{
+		{
+			desc:   "read a config",
+			config: cfg,
+			enc:    bin,
+			secret: false,
+		},
+		{
+			desc:   "read encrypted config",
+			config: cfg,
+			enc:    bin,
+			secret: true,
+		},
+	}
+
+	for _, tc := range cases {
+		res, err := reader.ReadConfig(tc.config, tc.secret)
+		require.Nil(t, err, fmt.Sprintf("Reading config to succeed: %s.\n", err))
+
+		if tc.secret {
+			d, err := dec(res.([]byte))
+			require.Nil(t, err, fmt.Sprintf("Decrypting expected to succeed: %s.\n", err))
+			assert.Equal(t, tc.enc, d, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.enc, d))
+			continue
+		}
+		b, err := json.Marshal(res)
+		require.Nil(t, err, fmt.Sprintf("Marshalling expected to succeed: %s.\n", err))
+		assert.Equal(t, tc.enc, b, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.enc, b))
+		resp, ok := res.(mainflux.Response)
+		require.True(t, ok, fmt.Sprintf("If not encrypted, reader should return response."))
+		assert.False(t, resp.Empty(), fmt.Sprintf("Response should not be empty %s.", err))
+		assert.Equal(t, http.StatusOK, resp.Code(), fmt.Sprintf("Default config response code should be 200."))
+	}
+}

bootstrap/redis/consumer/doc.go

@@ -0,0 +1,6 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package consumer contains events consumer for events
+// published by Things service.
+package consumer

bootstrap/redis/consumer/events.go

@@ -0,0 +1,20 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package consumer
+
+type removeEvent struct {
+	id string
+}
+
+type updateChannelEvent struct {
+	id       string
+	name     string
+	metadata map[string]interface{}
+}
+
+// Connection event is either connect or disconnect event.
+type disconnectEvent struct {
+	thingID   string
+	channelID string
+}

bootstrap/redis/consumer/streams.go

@@ -0,0 +1,158 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package consumer
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/go-redis/redis"
+	"github.com/mainflux/mainflux/bootstrap"
+	"github.com/mainflux/mainflux/logger"
+)
+
+const (
+	stream = "mainflux.things"
+	group  = "mainflux.bootstrap"
+
+	thingPrefix     = "thing."
+	thingRemove     = thingPrefix + "remove"
+	thingDisconnect = thingPrefix + "disconnect"
+
+	channelPrefix = "channel."
+	channelUpdate = channelPrefix + "update"
+	channelRemove = channelPrefix + "remove"
+
+	exists = "BUSYGROUP Consumer Group name already exists"
+)
+
+// Subscriber represents event source for things and channels provisioning.
+type Subscriber interface {
+	// Subscribes to given subject and receives events.
+	Subscribe(string) error
+}
+
+type eventStore struct {
+	svc      bootstrap.Service
+	client   *redis.Client
+	consumer string
+	logger   logger.Logger
+}
+
+// NewEventStore returns new event store instance.
+func NewEventStore(svc bootstrap.Service, client *redis.Client, consumer string, log logger.Logger) Subscriber {
+	return eventStore{
+		svc:      svc,
+		client:   client,
+		consumer: consumer,
+		logger:   log,
+	}
+}
+
+func (es eventStore) Subscribe(subject string) error {
+	err := es.client.XGroupCreateMkStream(stream, group, "$").Err()
+	if err != nil && err.Error() != exists {
+		return err
+	}
+
+	for {
+		streams, err := es.client.XReadGroup(&redis.XReadGroupArgs{
+			Group:    group,
+			Consumer: es.consumer,
+			Streams:  []string{stream, ">"},
+			Count:    100,
+		}).Result()
+		if err != nil || len(streams) == 0 {
+			continue
+		}
+
+		for _, msg := range streams[0].Messages {
+			event := msg.Values
+
+			var err error
+			switch event["operation"] {
+			case thingRemove:
+				rte := decodeRemoveThing(event)
+				err = es.handleRemoveThing(rte)
+			case thingDisconnect:
+				dte := decodeDisconnectThing(event)
+				err = es.handleDisconnectThing(dte)
+			case channelUpdate:
+				uce := decodeUpdateChannel(event)
+				err = es.handleUpdateChannel(uce)
+			case channelRemove:
+				rce := decodeRemoveChannel(event)
+				err = es.handleRemoveChannel(rce)
+			}
+			if err != nil {
+				es.logger.Warn(fmt.Sprintf("Failed to handle event sourcing: %s", err.Error()))
+				break
+			}
+			es.client.XAck(stream, group, msg.ID)
+		}
+	}
+}
+
+func decodeRemoveThing(event map[string]interface{}) removeEvent {
+	return removeEvent{
+		id: read(event, "id", ""),
+	}
+}
+
+func decodeUpdateChannel(event map[string]interface{}) updateChannelEvent {
+	strmeta := read(event, "metadata", "{}")
+	var metadata map[string]interface{}
+	if err := json.Unmarshal([]byte(strmeta), metadata); err != nil {
+		metadata = map[string]interface{}{}
+	}
+
+	return updateChannelEvent{
+		id:       read(event, "id", ""),
+		name:     read(event, "name", ""),
+		metadata: metadata,
+	}
+}
+
+func decodeRemoveChannel(event map[string]interface{}) removeEvent {
+	return removeEvent{
+		id: read(event, "id", ""),
+	}
+}
+
+func decodeDisconnectThing(event map[string]interface{}) disconnectEvent {
+	return disconnectEvent{
+		channelID: read(event, "chan_id", ""),
+		thingID:   read(event, "thing_id", ""),
+	}
+}
+
+func (es eventStore) handleRemoveThing(rte removeEvent) error {
+	return es.svc.RemoveConfigHandler(rte.id)
+}
+
+func (es eventStore) handleUpdateChannel(uce updateChannelEvent) error {
+	channel := bootstrap.Channel{
+		ID:       uce.id,
+		Name:     uce.name,
+		Metadata: uce.metadata,
+	}
+	return es.svc.UpdateChannelHandler(channel)
+}
+
+func (es eventStore) handleRemoveChannel(rce removeEvent) error {
+	return es.svc.RemoveChannelHandler(rce.id)
+}
+
+func (es eventStore) handleDisconnectThing(dte disconnectEvent) error {
+	return es.svc.DisconnectThingHandler(dte.channelID, dte.thingID)
+}
+
+func read(event map[string]interface{}, key, def string) string {
+	val, ok := event[key].(string)
+	if !ok {
+		return def
+	}
+
+	return val
+}

bootstrap/redis/events.go

@@ -1,17 +0,0 @@
-package redis
-
-type removeEvent struct {
-	id string
-}
-
-type updateChannelEvent struct {
-	id       string
-	name     string
-	metadata string
-}
-
-// Connection event is either connect or disconnect event.
-type disconnectEvent struct {
-	thingID   string
-	channelID string
-}

bootstrap/redis/producer/doc.go

@@ -0,0 +1,6 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package producer contains the domain events needed to support
+// event sourcing of Bootstrap service actions.
+package producer

bootstrap/redis/producer/events.go

@@ -0,0 +1,134 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package producer
+
+import (
+	"strings"
+	"time"
+
+	"github.com/mainflux/mainflux/bootstrap"
+)
+
+const (
+	configPrefix = "config."
+	configCreate = configPrefix + "create"
+	configUpdate = configPrefix + "update"
+	configRemove = configPrefix + "remove"
+
+	thingPrefix            = "thing."
+	thingBootstrap         = thingPrefix + "bootstrap"
+	thingStateChange       = thingPrefix + "state_change"
+	thingUpdateConnections = thingPrefix + "update_connections"
+)
+
+type event interface {
+	encode() map[string]interface{}
+}
+
+var (
+	_ event = (*createConfigEvent)(nil)
+	_ event = (*updateConfigEvent)(nil)
+	_ event = (*removeConfigEvent)(nil)
+	_ event = (*bootstrapEvent)(nil)
+	_ event = (*changeStateEvent)(nil)
+	_ event = (*updateConnectionsEvent)(nil)
+)
+
+type createConfigEvent struct {
+	mfThing    string
+	owner      string
+	name       string
+	mfChannels []string
+	externalID string
+	content    string
+	timestamp  time.Time
+}
+
+func (cce createConfigEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"thing_id":    cce.mfThing,
+		"owner":       cce.owner,
+		"name":        cce.name,
+		"channels":    strings.Join(cce.mfChannels, ", "),
+		"external_id": cce.externalID,
+		"content":     cce.content,
+		"timestamp":   cce.timestamp.Unix(),
+		"operation":   configCreate,
+	}
+}
+
+type updateConfigEvent struct {
+	mfThing   string
+	name      string
+	content   string
+	timestamp time.Time
+}
+
+func (uce updateConfigEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"thing_id":  uce.mfThing,
+		"name":      uce.name,
+		"content":   uce.content,
+		"timestamp": uce.timestamp.Unix(),
+		"operation": configUpdate,
+	}
+}
+
+type removeConfigEvent struct {
+	mfThing   string
+	timestamp time.Time
+}
+
+func (rce removeConfigEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"thing_id":  rce.mfThing,
+		"timestamp": rce.timestamp.Unix(),
+		"operation": configRemove,
+	}
+}
+
+type bootstrapEvent struct {
+	externalID string
+	success    bool
+	timestamp  time.Time
+}
+
+func (be bootstrapEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"external_id": be.externalID,
+		"success":     be.success,
+		"timestamp":   be.timestamp.Unix(),
+		"operation":   thingBootstrap,
+	}
+}
+
+type changeStateEvent struct {
+	mfThing   string
+	state     bootstrap.State
+	timestamp time.Time
+}
+
+func (cse changeStateEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"thing_id":  cse.mfThing,
+		"state":     cse.state.String(),
+		"timestamp": cse.timestamp.Unix(),
+		"operation": thingStateChange,
+	}
+}
+
+type updateConnectionsEvent struct {
+	mfThing    string
+	mfChannels []string
+	timestamp  time.Time
+}
+
+func (uce updateConnectionsEvent) encode() map[string]interface{} {
+	return map[string]interface{}{
+		"thing_id":  uce.mfThing,
+		"channels":  strings.Join(uce.mfChannels, ", "),
+		"timestamp": uce.timestamp.Unix(),
+		"operation": thingUpdateConnections,
+	}
+}

bootstrap/redis/producer/setup_test.go

@@ -0,0 +1,53 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package producer_test
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"testing"
+
+	"github.com/go-redis/redis"
+	dockertest "github.com/ory/dockertest/v3"
+)
+
+const (
+	wrongID    = 0
+	wrongValue = "wrong-value"
+)
+
+var redisClient *redis.Client
+
+func TestMain(m *testing.M) {
+	pool, err := dockertest.NewPool("")
+	if err != nil {
+		log.Fatalf("Could not connect to docker: %s", err)
+	}
+
+	container, err := pool.Run("redis", "5.0-alpine", nil)
+	if err != nil {
+		log.Fatalf("Could not start container: %s", err)
+	}
+
+	if err := pool.Retry(func() error {
+		redisClient = redis.NewClient(&redis.Options{
+			Addr:     fmt.Sprintf("localhost:%s", container.GetPort("6379/tcp")),
+			Password: "",
+			DB:       0,
+		})
+
+		return redisClient.Ping().Err()
+	}); err != nil {
+		log.Fatalf("Could not connect to docker: %s", err)
+	}
+
+	code := m.Run()
+
+	if err := pool.Purge(container); err != nil {
+		log.Fatalf("Could not purge container: %s", err)
+	}
+
+	os.Exit(code)
+}

bootstrap/redis/producer/streams.go

@@ -0,0 +1,178 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package producer
+
+import (
+	"time"
+
+	"github.com/go-redis/redis"
+	"github.com/mainflux/mainflux/bootstrap"
+)
+
+const (
+	streamID  = "mainflux.bootstrap"
+	streamLen = 1000
+)
+
+var _ bootstrap.Service = (*eventStore)(nil)
+
+type eventStore struct {
+	svc    bootstrap.Service
+	client *redis.Client
+}
+
+// NewEventStoreMiddleware returns wrapper around bootstrap service that sends
+// events to event store.
+func NewEventStoreMiddleware(svc bootstrap.Service, client *redis.Client) bootstrap.Service {
+	return eventStore{
+		svc:    svc,
+		client: client,
+	}
+}
+
+func (es eventStore) Add(token string, cfg bootstrap.Config) (bootstrap.Config, error) {
+	saved, err := es.svc.Add(token, cfg)
+	if err != nil {
+		return saved, err
+	}
+
+	var channels []string
+	for _, ch := range saved.MFChannels {
+		channels = append(channels, ch.ID)
+	}
+
+	ev := createConfigEvent{
+		mfThing:    saved.MFThing,
+		owner:      saved.Owner,
+		name:       saved.Name,
+		mfChannels: channels,
+		externalID: saved.ExternalID,
+		content:    saved.Content,
+		timestamp:  time.Now(),
+	}
+
+	es.add(ev)
+
+	return saved, err
+}
+
+func (es eventStore) View(token, id string) (bootstrap.Config, error) {
+	return es.svc.View(token, id)
+}
+
+func (es eventStore) Update(token string, cfg bootstrap.Config) error {
+	if err := es.svc.Update(token, cfg); err != nil {
+		return err
+	}
+
+	ev := updateConfigEvent{
+		mfThing:   cfg.MFThing,
+		name:      cfg.Name,
+		content:   cfg.Content,
+		timestamp: time.Now(),
+	}
+
+	es.add(ev)
+
+	return nil
+}
+
+func (es eventStore) UpdateCert(token, thingKey, clientCert, clientKey, caCert string) error {
+	return es.svc.UpdateCert(token, thingKey, clientCert, clientKey, caCert)
+}
+
+func (es eventStore) UpdateConnections(token, id string, connections []string) error {
+	if err := es.svc.UpdateConnections(token, id, connections); err != nil {
+		return err
+	}
+
+	ev := updateConnectionsEvent{
+		mfThing:    id,
+		mfChannels: connections,
+		timestamp:  time.Now(),
+	}
+
+	es.add(ev)
+
+	return nil
+}
+
+func (es eventStore) List(token string, filter bootstrap.Filter, offset, limit uint64) (bootstrap.ConfigsPage, error) {
+	return es.svc.List(token, filter, offset, limit)
+}
+
+func (es eventStore) Remove(token, id string) error {
+	if err := es.svc.Remove(token, id); err != nil {
+		return err
+	}
+
+	ev := removeConfigEvent{
+		mfThing:   id,
+		timestamp: time.Now(),
+	}
+
+	es.add(ev)
+
+	return nil
+}
+
+func (es eventStore) Bootstrap(externalKey, externalID string, secure bool) (bootstrap.Config, error) {
+	cfg, err := es.svc.Bootstrap(externalKey, externalID, secure)
+
+	ev := bootstrapEvent{
+		externalID: externalID,
+		timestamp:  time.Now(),
+		success:    true,
+	}
+
+	if err != nil {
+		ev.success = false
+	}
+
+	es.add(ev)
+
+	return cfg, err
+}
+
+func (es eventStore) ChangeState(token, id string, state bootstrap.State) error {
+	if err := es.svc.ChangeState(token, id, state); err != nil {
+		return err
+	}
+
+	ev := changeStateEvent{
+		mfThing:   id,
+		state:     state,
+		timestamp: time.Now(),
+	}
+
+	es.add(ev)
+
+	return nil
+}
+
+func (es eventStore) RemoveConfigHandler(id string) error {
+	return es.svc.RemoveConfigHandler(id)
+}
+
+func (es eventStore) RemoveChannelHandler(id string) error {
+	return es.svc.RemoveChannelHandler(id)
+}
+
+func (es eventStore) UpdateChannelHandler(channel bootstrap.Channel) error {
+	return es.UpdateChannelHandler(channel)
+}
+
+func (es eventStore) DisconnectThingHandler(channelID, thingID string) error {
+	return es.svc.DisconnectThingHandler(channelID, thingID)
+}
+
+func (es eventStore) add(ev event) error {
+	record := &redis.XAddArgs{
+		Stream:       streamID,
+		MaxLenApprox: streamLen,
+		Values:       ev.encode(),
+	}
+
+	return es.client.XAdd(record).Err()
+}

bootstrap/redis/producer/streams_test.go

@@ -0,0 +1,547 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package producer_test
+
+import (
+	"fmt"
+	"net/http/httptest"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/go-redis/redis"
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/opentracing/opentracing-go/mocktracer"
+
+	"github.com/mainflux/mainflux/bootstrap"
+	"github.com/mainflux/mainflux/bootstrap/mocks"
+	"github.com/mainflux/mainflux/bootstrap/redis/producer"
+	mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
+	"github.com/mainflux/mainflux/things"
+	httpapi "github.com/mainflux/mainflux/things/api/things/http"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	streamID      = "mainflux.bootstrap"
+	email         = "user@example.com"
+	validToken    = "validToken"
+	channelsNum   = 3
+	defaultTimout = 5
+
+	configPrefix = "config."
+	configCreate = configPrefix + "create"
+	configUpdate = configPrefix + "update"
+	configRemove = configPrefix + "remove"
+
+	thingPrefix            = "thing."
+	thingStateChange       = thingPrefix + "state_change"
+	thingBootstrap         = thingPrefix + "bootstrap"
+	thingUpdateConnections = thingPrefix + "update_connections"
+)
+
+var (
+	encKey = []byte("1234567891011121")
+
+	channel = bootstrap.Channel{
+		ID:       "1",
+		Name:     "name",
+		Metadata: map[string]interface{}{"name": "value"},
+	}
+
+	config = bootstrap.Config{
+		ExternalID:  "external_id",
+		ExternalKey: "external_key",
+		MFChannels:  []bootstrap.Channel{channel},
+		Content:     "config",
+	}
+)
+
+func newService(auth mainflux.AuthNServiceClient, url string) bootstrap.Service {
+	configs := mocks.NewConfigsRepository()
+	config := mfsdk.Config{
+		BaseURL: url,
+	}
+
+	sdk := mfsdk.NewSDK(config)
+	return bootstrap.New(auth, configs, sdk, encKey)
+}
+
+func newThingsService(auth mainflux.AuthNServiceClient) things.Service {
+	channels := make(map[string]things.Channel, channelsNum)
+	for i := 0; i < channelsNum; i++ {
+		id := strconv.Itoa(i + 1)
+		channels[id] = things.Channel{
+			ID:       id,
+			Owner:    email,
+			Metadata: map[string]interface{}{"meta": "data"},
+		}
+	}
+
+	return mocks.NewThingsService(map[string]things.Thing{}, channels, auth)
+}
+
+func newThingsServer(svc things.Service) *httptest.Server {
+	mux := httpapi.MakeHandler(mocktracer.New(), svc)
+	return httptest.NewServer(mux)
+}
+func TestAdd(t *testing.T) {
+	redisClient.FlushAll().Err()
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	var channels []string
+	for _, ch := range config.MFChannels {
+		channels = append(channels, ch.ID)
+	}
+
+	invalidConfig := config
+	invalidConfig.MFChannels = []bootstrap.Channel{bootstrap.Channel{ID: "empty"}}
+
+	cases := []struct {
+		desc   string
+		config bootstrap.Config
+		token  string
+		err    error
+		event  map[string]interface{}
+	}{
+		{
+			desc:   "create config successfully",
+			config: config,
+			token:  validToken,
+			err:    nil,
+			event: map[string]interface{}{
+				"thing_id":    "1",
+				"owner":       email,
+				"name":        config.Name,
+				"channels":    strings.Join(channels, ", "),
+				"external_id": config.ExternalID,
+				"content":     config.Content,
+				"timestamp":   time.Now().Unix(),
+				"operation":   configCreate,
+			},
+		},
+		{
+			desc:   "create invalid config",
+			config: invalidConfig,
+			token:  validToken,
+			err:    bootstrap.ErrMalformedEntity,
+			event:  nil,
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		_, err := svc.Add(tc.token, tc.config)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+
+func TestView(t *testing.T) {
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+
+	saved, err := svc.Add(validToken, config)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	svcConfig, svcErr := svc.View(validToken, saved.MFThing)
+
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+	esConfig, esErr := svc.View(validToken, saved.MFThing)
+
+	assert.Equal(t, svcConfig, esConfig, fmt.Sprintf("event sourcing changed service behavior: expected %v got %v", svcConfig, esConfig))
+	assert.Equal(t, svcErr, esErr, fmt.Sprintf("event sourcing changed service behavior: expected %v got %v", svcErr, esErr))
+}
+
+func TestUpdate(t *testing.T) {
+	redisClient.FlushAll().Err()
+
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	c := config
+
+	ch := channel
+	ch.ID = "2"
+	c.MFChannels = append(c.MFChannels, ch)
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+	redisClient.FlushAll().Err()
+
+	modified := saved
+	modified.Content = "new-config"
+	modified.Name = "new name"
+
+	nonExisting := config
+	nonExisting.MFThing = "unknown"
+
+	cases := []struct {
+		desc   string
+		config bootstrap.Config
+		token  string
+		err    error
+		event  map[string]interface{}
+	}{
+		{
+			desc:   "update config successfully",
+			config: modified,
+			token:  validToken,
+			err:    nil,
+			event: map[string]interface{}{
+				"thing_id":  modified.MFThing,
+				"name":      modified.Name,
+				"content":   modified.Content,
+				"timestamp": time.Now().Unix(),
+				"operation": configUpdate,
+			},
+		},
+		{
+			desc:   "update non-existing config",
+			config: nonExisting,
+			token:  validToken,
+			err:    bootstrap.ErrNotFound,
+			event:  nil,
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		err := svc.Update(tc.token, tc.config)
+		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+
+func TestUpdateConnections(t *testing.T) {
+	redisClient.FlushAll().Err()
+
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	saved, err := svc.Add(validToken, config)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+	redisClient.FlushAll().Err()
+
+	cases := []struct {
+		desc        string
+		id          string
+		token       string
+		connections []string
+		err         error
+		event       map[string]interface{}
+	}{
+		{
+			desc:        "update connections successfully",
+			id:          saved.MFThing,
+			token:       validToken,
+			connections: []string{"2"},
+			err:         nil,
+			event: map[string]interface{}{
+				"thing_id":  saved.MFThing,
+				"channels":  "2",
+				"timestamp": time.Now().Unix(),
+				"operation": thingUpdateConnections,
+			},
+		},
+		{
+			desc:        "update connections unsuccessfully",
+			id:          saved.MFThing,
+			token:       validToken,
+			connections: []string{"256"},
+			err:         bootstrap.ErrMalformedEntity,
+			event:       nil,
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		err := svc.UpdateConnections(tc.token, tc.id, tc.connections)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+func TestList(t *testing.T) {
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+
+	_, err := svc.Add(validToken, config)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	offset := uint64(0)
+	limit := uint64(10)
+	svcConfigs, svcErr := svc.List(validToken, bootstrap.Filter{}, offset, limit)
+
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+	esConfigs, esErr := svc.List(validToken, bootstrap.Filter{}, offset, limit)
+
+	assert.Equal(t, svcConfigs, esConfigs, fmt.Sprintf("event sourcing changed service behavior: expected %v got %v", svcConfigs, esConfigs))
+	assert.Equal(t, svcErr, esErr, fmt.Sprintf("event sourcing changed service behavior: expected %v got %v", svcErr, esErr))
+}
+
+func TestRemove(t *testing.T) {
+	redisClient.FlushAll().Err()
+
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	c := config
+
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+	redisClient.FlushAll().Err()
+
+	cases := []struct {
+		desc  string
+		id    string
+		token string
+		err   error
+		event map[string]interface{}
+	}{
+		{
+			desc:  "remove config successfully",
+			id:    saved.MFThing,
+			token: validToken,
+			err:   nil,
+			event: map[string]interface{}{
+				"thing_id":  saved.MFThing,
+				"timestamp": time.Now().Unix(),
+				"operation": configRemove,
+			},
+		},
+		{
+			desc:  "remove config with invalid credentials",
+			id:    saved.MFThing,
+			token: "",
+			err:   bootstrap.ErrUnauthorizedAccess,
+			event: nil,
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		err := svc.Remove(tc.token, tc.id)
+		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+
+func TestBootstrap(t *testing.T) {
+	redisClient.FlushAll().Err()
+
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	c := config
+
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+	redisClient.FlushAll().Err()
+
+	cases := []struct {
+		desc        string
+		externalID  string
+		externalKey string
+		err         error
+		event       map[string]interface{}
+	}{
+		{
+			desc:        "bootstrap successfully",
+			externalID:  saved.ExternalID,
+			externalKey: saved.ExternalKey,
+			err:         nil,
+			event: map[string]interface{}{
+				"external_id": saved.ExternalID,
+				"success":     "1",
+				"timestamp":   time.Now().Unix(),
+				"operation":   thingBootstrap,
+			},
+		},
+		{
+			desc:        "bootstrap with an error",
+			externalID:  saved.ExternalID,
+			externalKey: "external",
+			err:         bootstrap.ErrNotFound,
+			event: map[string]interface{}{
+				"external_id": saved.ExternalID,
+				"success":     "0",
+				"timestamp":   time.Now().Unix(),
+				"operation":   thingBootstrap,
+			},
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		_, err := svc.Bootstrap(tc.externalKey, tc.externalID, false)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+
+func TestChangeState(t *testing.T) {
+	redisClient.FlushAll().Err()
+
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	svc = producer.NewEventStoreMiddleware(svc, redisClient)
+
+	c := config
+
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+	redisClient.FlushAll().Err()
+
+	cases := []struct {
+		desc  string
+		id    string
+		token string
+		state bootstrap.State
+		err   error
+		event map[string]interface{}
+	}{
+		{
+			desc:  "change state to active",
+			id:    saved.MFThing,
+			token: validToken,
+			state: bootstrap.Active,
+			err:   nil,
+			event: map[string]interface{}{
+				"thing_id":  saved.MFThing,
+				"state":     bootstrap.Active.String(),
+				"timestamp": time.Now().Unix(),
+				"operation": thingStateChange,
+			},
+		},
+		{
+			desc:  "change state invalid credentials",
+			id:    saved.MFThing,
+			token: "",
+			state: bootstrap.Inactive,
+			err:   bootstrap.ErrUnauthorizedAccess,
+			event: nil,
+		},
+	}
+
+	lastID := "0"
+	for _, tc := range cases {
+		err := svc.ChangeState(tc.token, tc.id, tc.state)
+		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+
+		streams := redisClient.XRead(&redis.XReadArgs{
+			Streams: []string{streamID, lastID},
+			Count:   1,
+			Block:   time.Second,
+		}).Val()
+
+		var event map[string]interface{}
+		if len(streams) > 0 && len(streams[0].Messages) > 0 {
+			msg := streams[0].Messages[0]
+			event = msg.Values
+			lastID = msg.ID
+		}
+
+		test(t, tc.event, event, tc.desc)
+	}
+}
+
+func test(t *testing.T, expected, actual map[string]interface{}, description string) {
+	if expected != nil && actual != nil {
+		ts1 := expected["timestamp"].(int64)
+		ts2, err := strconv.ParseInt(actual["timestamp"].(string), 10, 64)
+		require.Nil(t, err, fmt.Sprintf("%s: expected to get a valid timestamp, got %s", description, err))
+		val := ts1 == ts2 || ts2 <= ts1+defaultTimout
+		assert.True(t, val, fmt.Sprintf("%s: timestamp is not in valid range", description))
+		delete(expected, "timestamp")
+		delete(actual, "timestamp")
+		assert.Equal(t, expected, actual, fmt.Sprintf("%s: expected %v got %v\n", description, expected, actual))
+	}
+}

bootstrap/redis/streams.go

@@ -1,148 +0,0 @@
-package redis
-
-import (
-	"fmt"
-
-	"github.com/go-redis/redis"
-	"github.com/mainflux/mainflux/bootstrap"
-	"github.com/mainflux/mainflux/logger"
-)
-
-const (
-	stream = "mainflux.things"
-	group  = "mainflux.bootstrap"
-
-	thingPrefix     = "thing."
-	thingRemove     = thingPrefix + "remove"
-	thingDisconnect = thingPrefix + "disconnect"
-
-	channelPrefix = "channel."
-	channelUpdate = channelPrefix + "update"
-	channelRemove = channelPrefix + "remove"
-
-	exists = "BUSYGROUP Consumer Group name already exists"
-)
-
-// EventStore represents event source for things and channels provisioning.
-type EventStore interface {
-	// Subscribes to given subject and receives events.
-	Subscribe(string) error
-}
-
-type eventStore struct {
-	svc      bootstrap.Service
-	client   *redis.Client
-	consumer string
-	logger   logger.Logger
-}
-
-// NewEventStore returns new event store instance.
-func NewEventStore(svc bootstrap.Service, client *redis.Client, consumer string, log logger.Logger) EventStore {
-	return eventStore{
-		svc:      svc,
-		client:   client,
-		consumer: consumer,
-		logger:   log,
-	}
-}
-
-func (es eventStore) Subscribe(subject string) error {
-	err := es.client.XGroupCreateMkStream(stream, group, "$").Err()
-	if err != nil && err.Error() != exists {
-		return err
-	}
-
-	for {
-		streams, err := es.client.XReadGroup(&redis.XReadGroupArgs{
-			Group:    group,
-			Consumer: es.consumer,
-			Streams:  []string{stream, ">"},
-			Count:    100,
-		}).Result()
-		if err != nil || len(streams) == 0 {
-			continue
-		}
-
-		for _, msg := range streams[0].Messages {
-			event := msg.Values
-
-			var err error
-			switch event["operation"] {
-			case thingRemove:
-				rte := decodeRemoveThing(event)
-				err = es.handleRemoveThing(rte)
-			case thingDisconnect:
-				dte := decodeDisconnectThing(event)
-				err = es.handleDisconnectThing(dte)
-			case channelUpdate:
-				uce := decodeUpdateChannel(event)
-				err = es.handleUpdateChannel(uce)
-			case channelRemove:
-				rce := decodeRemoveChannel(event)
-				err = es.handleRemoveChannel(rce)
-			}
-			if err != nil {
-				es.logger.Warn(fmt.Sprintf("Failed to handle event sourcing: %s", err.Error()))
-				break
-			}
-			es.client.XAck(stream, group, msg.ID)
-		}
-	}
-}
-
-func decodeRemoveThing(event map[string]interface{}) removeEvent {
-	return removeEvent{
-		id: read(event, "id", ""),
-	}
-}
-
-func decodeUpdateChannel(event map[string]interface{}) updateChannelEvent {
-	return updateChannelEvent{
-		id:       read(event, "id", ""),
-		name:     read(event, "name", ""),
-		metadata: read(event, "metadata", ""),
-	}
-}
-
-func decodeRemoveChannel(event map[string]interface{}) removeEvent {
-	return removeEvent{
-		id: read(event, "id", ""),
-	}
-}
-
-func decodeDisconnectThing(event map[string]interface{}) disconnectEvent {
-	return disconnectEvent{
-		channelID: read(event, "chan_id", ""),
-		thingID:   read(event, "thing_id", ""),
-	}
-}
-
-func (es eventStore) handleRemoveThing(rte removeEvent) error {
-	return es.svc.RemoveConfigHandler(rte.id)
-}
-
-func (es eventStore) handleUpdateChannel(uce updateChannelEvent) error {
-	channel := bootstrap.Channel{
-		ID:       uce.id,
-		Name:     uce.name,
-		Metadata: uce.metadata,
-	}
-	return es.svc.UpdateChannelHandler(channel)
-}
-
-func (es eventStore) handleRemoveChannel(rce removeEvent) error {
-	return es.svc.RemoveChannelHandler(rce.id)
-}
-
-func (es eventStore) handleDisconnectThing(dte disconnectEvent) error {
-	return es.svc.DisconnectThingHandler(dte.channelID, dte.thingID)
-}
-
-func read(event map[string]interface{}, key, def string) string {
-	val, ok := event[key].(string)
-	if !ok {
-		return def
-	}
-
-	return val
-}

bootstrap/service.go

@@ -1,25 +1,18 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package bootstrap
 
 import (
 	"context"
-	"encoding/json"
-	"errors"
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/hex"
 	"time"
 
 	"github.com/mainflux/mainflux"
-	mfsdk "github.com/mainflux/mainflux/sdk/go"
-)
-
-const (
-	thingType = "device"
-	chanName  = "channel"
+	"github.com/mainflux/mainflux/pkg/errors"
+	mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
 )
 
 var (
@@ -38,7 +31,30 @@ var (
 
 	// ErrThings indicates failure to communicate with Mainflux Things service.
 	// It can be due to networking error or invalid/unauthorized request.
-	ErrThings = errors.New("error receiving response from Things service")
+	ErrThings = errors.New("failed to receive response from Things service")
+
+	// ErrExternalKeyNotFound indicates a non-existent bootstrap configuration for given external key
+	ErrExternalKeyNotFound = errors.New("failed to get bootstrap configuration for given external key")
+
+	// ErrSecureBootstrap indicates error in getting bootstrap configuration for given encrypted external key
+	ErrSecureBootstrap = errors.New("failed to get bootstrap configuration for given encrypted external key")
+
+	// ErrBootstrap indicates error in getting bootstrap configuration.
+	ErrBootstrap = errors.New("failed to read bootstrap configuration")
+
+	errAddBootstrap       = errors.New("failed to add bootstrap configuration")
+	errUpdateConnections  = errors.New("failed to update connections")
+	errRemoveBootstrap    = errors.New("failed to remove bootstrap configuration")
+	errChangeState        = errors.New("failed to change state of bootstrap configuration")
+	errUpdateChannel      = errors.New("failed to update channel")
+	errRemoveConfig       = errors.New("failed to remove bootstrap configuration")
+	errRemoveChannel      = errors.New("failed to remove channel")
+	errCreateThing        = errors.New("failed to create thing")
+	errDisconnectThing    = errors.New("failed to disconnect thing")
+	errThingNotFound      = errors.New("thing not found")
+	errCheckChannels      = errors.New("failed to check if channels exists")
+	errConnectionChannels = errors.New("failed to check channels connections")
+	errUpdateCert         = errors.New("failed to update cert")
 )
 
 var _ Service = (*bootstrapService)(nil)
@@ -46,45 +62,49 @@ var _ Service = (*bootstrapService)(nil)
 // Service specifies an API that must be fulfilled by the domain service
 // implementation, and all of its decorators (e.g. logging & metrics).
 type Service interface {
-	// Add adds new Thing Config to the user identified by the provided key.
-	Add(string, Config) (Config, error)
+	// Add adds new Thing Config to the user identified by the provided token.
+	Add(token string, cfg Config) (Config, error)
 
-	// View returns Thing Config with given ID belonging to the user identified by the given key.
-	View(string, string) (Config, error)
+	// View returns Thing Config with given ID belonging to the user identified by the given token.
+	View(token, id string) (Config, error)
 
 	// Update updates editable fields of the provided Config.
-	Update(string, Config) error
+	Update(token string, cfg Config) error
+
+	// UpdateCert updates an existing Config certificate and token.
+	// A non-nil error is returned to indicate operation failure.
+	UpdateCert(token, thingID, clientCert, clientKey, caCert string) error
 
 	// UpdateConnections updates list of Channels related to given Config.
-	UpdateConnections(string, string, []string) error
+	UpdateConnections(token, id string, connections []string) error
 
 	// List returns subset of Configs with given search params that belong to the
-	// user identified by the given key.
-	List(string, Filter, uint64, uint64) (ConfigsPage, error)
+	// user identified by the given token.
+	List(token string, filter Filter, offset, limit uint64) (ConfigsPage, error)
 
-	// Remove removes Config with specified key that belongs to the user identified by the given key.
-	Remove(string, string) error
+	// Remove removes Config with specified token that belongs to the user identified by the given token.
+	Remove(token, id string) error
 
 	// Bootstrap returns Config to the Thing with provided external ID using external key.
-	Bootstrap(string, string) (Config, error)
+	Bootstrap(externalKey, externalID string, secure bool) (Config, error)
 
 	// ChangeState changes state of the Thing with given ID and owner.
-	ChangeState(string, string, State) error
+	ChangeState(token, id string, state State) error
 
 	// Methods RemoveConfig, UpdateChannel, and RemoveChannel are used as
 	// handlers for events. That's why these methods surpass ownership check.
 
-	// RemoveConfigHandler removes Configuration with id received from an event.
-	RemoveConfigHandler(string) error
-
 	// UpdateChannelHandler updates Channel with data received from an event.
-	UpdateChannelHandler(Channel) error
+	UpdateChannelHandler(channel Channel) error
+
+	// RemoveConfigHandler removes Configuration with id received from an event.
+	RemoveConfigHandler(id string) error
 
 	// RemoveChannelHandler removes Channel with id received from an event.
-	RemoveChannelHandler(string) error
+	RemoveChannelHandler(id string) error
 
 	// DisconnectHandler changes state of the Config when connect/disconnect event occurs.
-	DisconnectThingHandler(string, string) error
+	DisconnectThingHandler(channelID, thingID string) error
 }
 
 // ConfigReader is used to parse Config into format which will be encoded
@@ -92,62 +112,66 @@ type Service interface {
 // is to provide convenient way to generate custom configuration response
 // based on the specific Config which will be consumed by the client.
 type ConfigReader interface {
-	ReadConfig(Config) (mainflux.Response, error)
+	ReadConfig(Config, bool) (interface{}, error)
 }
 
 type bootstrapService struct {
-	users   mainflux.UsersServiceClient
+	auth    mainflux.AuthNServiceClient
 	configs ConfigRepository
 	sdk     mfsdk.SDK
+	encKey  []byte
+	reader  ConfigReader
 }
 
 // New returns new Bootstrap service.
-func New(users mainflux.UsersServiceClient, configs ConfigRepository, sdk mfsdk.SDK) Service {
+func New(auth mainflux.AuthNServiceClient, configs ConfigRepository, sdk mfsdk.SDK, encKey []byte) Service {
 	return &bootstrapService{
 		configs: configs,
 		sdk:     sdk,
-		users:   users,
+		auth:    auth,
+		encKey:  encKey,
 	}
 }
 
-func (bs bootstrapService) Add(key string, cfg Config) (Config, error) {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) Add(token string, cfg Config) (Config, error) {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return Config{}, err
 	}
 
 	toConnect := bs.toIDList(cfg.MFChannels)
 
-	// Check if channels exist. This is the way to prevent invalid configuration to be saved.
+	// Check if channels exist. This is the way to prevent fetching channels that already exist.
 	existing, err := bs.configs.ListExisting(owner, toConnect)
 	if err != nil {
-		return Config{}, err
+		return Config{}, errors.Wrap(errCheckChannels, err)
 	}
 
-	cfg.MFChannels, err = bs.connectionChannels(toConnect, bs.toIDList(existing), key)
+	cfg.MFChannels, err = bs.connectionChannels(toConnect, bs.toIDList(existing), token)
 
 	if err != nil {
-		return Config{}, err
+		return Config{}, errors.Wrap(errConnectionChannels, err)
 	}
 
 	id := cfg.MFThing
-	mfThing, err := bs.thing(key, id)
+	mfThing, err := bs.thing(token, id)
 	if err != nil {
-		return Config{}, err
+		return Config{}, errors.Wrap(errAddBootstrap, err)
 	}
 
 	cfg.MFThing = mfThing.ID
 	cfg.Owner = owner
 	cfg.State = Inactive
 	cfg.MFKey = mfThing.Key
-	saved, err := bs.configs.Save(cfg, toConnect)
 
+	saved, err := bs.configs.Save(cfg, toConnect)
 	if err != nil {
 		if id == "" {
-			// Fail silently.
-			bs.sdk.DeleteThing(cfg.MFThing, key)
+			if errT := bs.sdk.DeleteThing(cfg.MFThing, token); errT != nil {
+				err = errors.Wrap(err, errT)
+			}
 		}
-		return Config{}, err
+		return Config{}, errors.Wrap(errAddBootstrap, err)
 	}
 
 	cfg.MFThing = saved
@@ -156,30 +180,17 @@ func (bs bootstrapService) Add(key string, cfg Config) (Config, error) {
 	return cfg, nil
 }
 
-func (bs bootstrapService) View(key, id string) (Config, error) {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) View(token, id string) (Config, error) {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return Config{}, err
 	}
 
-	cfg, err := bs.configs.RetrieveByID(owner, id)
-	if err != nil {
-		return Config{}, err
-	}
-
-	for i, ch := range cfg.MFChannels {
-		if meta, ok := ch.Metadata.([]byte); ok {
-			if err := json.Unmarshal(meta, &cfg.MFChannels[i].Metadata); err != nil {
-				return Config{}, err
-			}
-		}
-	}
-
-	return cfg, nil
+	return bs.configs.RetrieveByID(owner, id)
 }
 
-func (bs bootstrapService) Update(key string, cfg Config) error {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) Update(token string, cfg Config) error {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return err
 	}
@@ -189,21 +200,39 @@ func (bs bootstrapService) Update(key string, cfg Config) error {
 	return bs.configs.Update(cfg)
 }
 
-func (bs bootstrapService) UpdateConnections(key, id string, connections []string) error {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) UpdateCert(token, thingID, clientCert, clientKey, caCert string) error {
+	owner, err := bs.identify(token)
+	if err != nil {
+		return err
+	}
+	if err := bs.configs.UpdateCert(owner, thingID, clientCert, clientKey, caCert); err != nil {
+		return errors.Wrap(errUpdateCert, err)
+	}
+	return nil
+}
+
+func (bs bootstrapService) UpdateConnections(token, id string, connections []string) error {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return err
 	}
 
 	cfg, err := bs.configs.RetrieveByID(owner, id)
 	if err != nil {
-		return err
+		return errors.Wrap(errUpdateConnections, err)
 	}
 
 	add, remove := bs.updateList(cfg, connections)
-	channels, err := bs.updateChannels(add, key)
+
+	// Check if channels exist. This is the way to prevent fetching channels that already exist.
+	existing, err := bs.configs.ListExisting(owner, connections)
 	if err != nil {
-		return err
+		return errors.Wrap(errUpdateConnections, err)
+	}
+
+	channels, err := bs.connectionChannels(connections, bs.toIDList(existing), token)
+	if err != nil {
+		return errors.Wrap(errUpdateConnections, err)
 	}
 
 	cfg.MFChannels = channels
@@ -215,8 +244,8 @@ func (bs bootstrapService) UpdateConnections(key, id string, connections []strin
 	}
 
 	for _, c := range disconnect {
-		if err := bs.sdk.DisconnectThing(id, c, key); err != nil {
-			if err == mfsdk.ErrNotFound {
+		if err := bs.sdk.DisconnectThing(id, c, token); err != nil {
+			if errors.Contains(err, mfsdk.ErrFailedDisconnect) {
 				continue
 			}
 			return ErrThings
@@ -224,8 +253,12 @@ func (bs bootstrapService) UpdateConnections(key, id string, connections []strin
 	}
 
 	for _, c := range connect {
-		if err := bs.sdk.ConnectThing(id, c, key); err != nil {
-			if err == mfsdk.ErrNotFound {
+		conIDs := mfsdk.ConnectionIDs{
+			ChannelIDs: []string{c},
+			ThingIDs:   []string{id},
+		}
+		if err := bs.sdk.Connect(conIDs, token); err != nil {
+			if errors.Contains(err, mfsdk.ErrFailedConnect) {
 				return ErrMalformedEntity
 			}
 			return ErrThings
@@ -235,105 +268,122 @@ func (bs bootstrapService) UpdateConnections(key, id string, connections []strin
 	return bs.configs.UpdateConnections(owner, id, channels, connections)
 }
 
-func (bs bootstrapService) List(key string, filter Filter, offset, limit uint64) (ConfigsPage, error) {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) List(token string, filter Filter, offset, limit uint64) (ConfigsPage, error) {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return ConfigsPage{}, err
 	}
 
-	if filter.Unknown {
-		return bs.configs.RetrieveUnknown(offset, limit), nil
-	}
-
 	return bs.configs.RetrieveAll(owner, filter, offset, limit), nil
 }
 
-func (bs bootstrapService) Remove(key, id string) error {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) Remove(token, id string) error {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return err
 	}
-
-	return bs.configs.Remove(owner, id)
+	if err := bs.configs.Remove(owner, id); err != nil {
+		return errors.Wrap(errRemoveBootstrap, err)
+	}
+	return nil
 }
 
-func (bs bootstrapService) Bootstrap(externalKey, externalID string) (Config, error) {
-	cfg, err := bs.configs.RetrieveByExternalID(externalKey, externalID)
+func (bs bootstrapService) Bootstrap(externalKey, externalID string, secure bool) (Config, error) {
+	cfg, err := bs.configs.RetrieveByExternalID(externalID)
 	if err != nil {
-		if err == ErrNotFound {
-			bs.configs.SaveUnknown(externalKey, externalID)
-		}
-		return Config{}, ErrNotFound
+		return cfg, errors.Wrap(ErrBootstrap, err)
 	}
 
-	for i, ch := range cfg.MFChannels {
-		if meta, ok := ch.Metadata.([]byte); ok {
-			if err := json.Unmarshal(meta, &cfg.MFChannels[i].Metadata); err != nil {
-				return Config{}, err
-			}
+	if secure {
+		dec, err := bs.dec(externalKey)
+		if err != nil {
+			return Config{}, errors.Wrap(ErrSecureBootstrap, err)
 		}
+		externalKey = dec
+	}
+
+	if cfg.ExternalKey != externalKey {
+		return Config{}, errors.Wrap(ErrExternalKeyNotFound, ErrNotFound)
 	}
 
 	return cfg, nil
 }
 
-func (bs bootstrapService) ChangeState(key, id string, state State) error {
-	owner, err := bs.identify(key)
+func (bs bootstrapService) ChangeState(token, id string, state State) error {
+	owner, err := bs.identify(token)
 	if err != nil {
 		return err
 	}
 
-	thing, err := bs.configs.RetrieveByID(owner, id)
+	cfg, err := bs.configs.RetrieveByID(owner, id)
 	if err != nil {
-		return err
+		return errors.Wrap(errChangeState, err)
 	}
 
-	if thing.State == state {
+	if cfg.State == state {
 		return nil
 	}
 
 	switch state {
 	case Active:
-		for _, c := range thing.MFChannels {
-			if err := bs.sdk.ConnectThing(thing.MFThing, c.ID, key); err != nil {
+		for _, c := range cfg.MFChannels {
+			conIDs := mfsdk.ConnectionIDs{
+				ChannelIDs: []string{c.ID},
+				ThingIDs:   []string{cfg.MFThing},
+			}
+			if err := bs.sdk.Connect(conIDs, token); err != nil {
 				return ErrThings
 			}
 		}
 	case Inactive:
-		for _, c := range thing.MFChannels {
-			if err := bs.sdk.DisconnectThing(thing.MFThing, c.ID, key); err != nil {
-				if err == mfsdk.ErrNotFound {
+		for _, c := range cfg.MFChannels {
+			if err := bs.sdk.DisconnectThing(cfg.MFThing, c.ID, token); err != nil {
+				if errors.Contains(err, mfsdk.ErrFailedDisconnect) {
 					continue
 				}
 				return ErrThings
 			}
 		}
 	}
-
-	return bs.configs.ChangeState(owner, id, state)
+	if err := bs.configs.ChangeState(owner, id, state); err != nil {
+		return errors.Wrap(errChangeState, err)
+	}
+	return nil
 }
 
 func (bs bootstrapService) UpdateChannelHandler(channel Channel) error {
-	return bs.configs.UpdateChannel(channel)
+	if err := bs.configs.UpdateChannel(channel); err != nil {
+		return errors.Wrap(errUpdateChannel, err)
+	}
+	return nil
 }
 
 func (bs bootstrapService) RemoveConfigHandler(id string) error {
-	return bs.configs.RemoveThing(id)
+	if err := bs.configs.RemoveThing(id); err != nil {
+		return errors.Wrap(errRemoveConfig, err)
+	}
+	return nil
 }
 
 func (bs bootstrapService) RemoveChannelHandler(id string) error {
-	return bs.configs.RemoveChannel(id)
+	if err := bs.configs.RemoveChannel(id); err != nil {
+		return errors.Wrap(errRemoveChannel, err)
+	}
+	return nil
 }
 
 func (bs bootstrapService) DisconnectThingHandler(channelID, thingID string) error {
-	return bs.configs.DisconnectThing(channelID, thingID)
+	if err := bs.configs.DisconnectThing(channelID, thingID); err != nil {
+		return errors.Wrap(errDisconnectThing, err)
+	}
+	return nil
 }
 
 func (bs bootstrapService) identify(token string) (string, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
 	defer cancel()
 
-	res, err := bs.users.Identify(ctx, &mainflux.Token{Value: token})
+	res, err := bs.auth.Identify(ctx, &mainflux.Token{Value: token})
 	if err != nil {
 		return "", ErrUnauthorizedAccess
 	}
@@ -342,33 +392,64 @@ func (bs bootstrapService) identify(token string) (string, error) {
 }
 
 // Method thing retrieves Mainflux Thing creating one if an empty ID is passed.
-func (bs bootstrapService) thing(key, id string) (mfsdk.Thing, error) {
+func (bs bootstrapService) thing(token, id string) (mfsdk.Thing, error) {
 	thingID := id
 	var err error
 
 	if id == "" {
-		thingID, err = bs.sdk.CreateThing(mfsdk.Thing{Type: thingType}, key)
+		thingID, err = bs.sdk.CreateThing(mfsdk.Thing{}, token)
 		if err != nil {
-			return mfsdk.Thing{}, err
+			return mfsdk.Thing{}, errors.Wrap(errCreateThing, err)
 		}
 	}
 
-	thing, err := bs.sdk.Thing(thingID, key)
+	thing, err := bs.sdk.Thing(thingID, token)
 	if err != nil {
-		if err == mfsdk.ErrNotFound {
-			return mfsdk.Thing{}, ErrNotFound
+		if errors.Contains(err, mfsdk.ErrFailedFetch) {
+			return mfsdk.Thing{}, errors.Wrap(errThingNotFound, ErrNotFound)
 		}
 
 		if id != "" {
-			bs.sdk.DeleteThing(thingID, key)
+			if errT := bs.sdk.DeleteThing(thingID, token); errT != nil {
+				err = errors.Wrap(err, errT)
+			}
 		}
 
-		return mfsdk.Thing{}, ErrThings
+		return mfsdk.Thing{}, errors.Wrap(ErrThings, err)
 	}
 
 	return thing, nil
 }
 
+func (bs bootstrapService) connectionChannels(channels, existing []string, token string) ([]Channel, error) {
+	add := make(map[string]bool, len(channels))
+	for _, ch := range channels {
+		add[ch] = true
+	}
+
+	for _, ch := range existing {
+		if add[ch] == true {
+			delete(add, ch)
+		}
+	}
+
+	var ret []Channel
+	for id := range add {
+		ch, err := bs.sdk.Channel(id, token)
+		if err != nil {
+			return nil, errors.Wrap(ErrMalformedEntity, err)
+		}
+
+		ret = append(ret, Channel{
+			ID:       ch.ID,
+			Name:     ch.Name,
+			Metadata: ch.Metadata,
+		})
+	}
+
+	return ret, nil
+}
+
 // Method updateList accepts config and channel IDs and returns three lists:
 // 1) IDs of Channels to be added
 // 2) IDs of Channels to be removed
@@ -406,49 +487,21 @@ func (bs bootstrapService) toIDList(channels []Channel) []string {
 	return ret
 }
 
-func (bs bootstrapService) updateChannels(add []string, key string) ([]Channel, error) {
-	var ret []Channel
-	for _, id := range add {
-		ch, err := bs.sdk.Channel(id, key)
-		if err != nil {
-			return []Channel{}, ErrMalformedEntity
-		}
-
-		ret = append(ret, Channel{
-			ID:       ch.ID,
-			Name:     ch.Name,
-			Metadata: ch.Metadata,
-		})
+func (bs bootstrapService) dec(in string) (string, error) {
+	ciphertext, err := hex.DecodeString(in)
+	if err != nil {
+		return "", ErrNotFound
 	}
-
-	return ret, nil
-}
-
-func (bs bootstrapService) connectionChannels(channels, existing []string, key string) ([]Channel, error) {
-	add := make(map[string]bool, len(channels))
-	for _, ch := range channels {
-		add[ch] = true
-	}
-
-	for _, ch := range existing {
-		if add[ch] == true {
-			delete(add, ch)
-		}
-	}
-
-	var ret []Channel
-	for id := range add {
-		ch, err := bs.sdk.Channel(id, key)
-		if err != nil {
-			return nil, ErrMalformedEntity
-		}
-
-		ret = append(ret, Channel{
-			ID:       ch.ID,
-			Name:     ch.Name,
-			Metadata: ch.Metadata,
-		})
-	}
-
-	return ret, nil
+	block, err := aes.NewCipher(bs.encKey)
+	if err != nil {
+		return "", err
+	}
+	if len(ciphertext) < aes.BlockSize {
+		return "", ErrMalformedEntity
+	}
+	iv := ciphertext[:aes.BlockSize]
+	ciphertext = ciphertext[aes.BlockSize:]
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(ciphertext, ciphertext)
+	return string(ciphertext), nil
 }

bootstrap/service_test.go

@@ -1,25 +1,29 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package bootstrap_test
 
 import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"encoding/hex"
 	"fmt"
+	"io"
 	"net/http/httptest"
 	"strconv"
 	"testing"
 
+	"github.com/opentracing/opentracing-go/mocktracer"
+
+	"github.com/gofrs/uuid"
 	"github.com/mainflux/mainflux"
 	"github.com/mainflux/mainflux/bootstrap"
 	"github.com/mainflux/mainflux/bootstrap/mocks"
-	mfsdk "github.com/mainflux/mainflux/sdk/go"
+	"github.com/mainflux/mainflux/pkg/errors"
+	mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
 	"github.com/mainflux/mainflux/things"
-	httpapi "github.com/mainflux/mainflux/things/api/http"
-	uuid "github.com/satori/go.uuid"
+	httpapi "github.com/mainflux/mainflux/things/api/things/http"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -29,16 +33,16 @@ const (
 	invalidToken = "invalidToken"
 	email        = "test@example.com"
 	unknown      = "unknown"
-	unknownID    = "1"
-	unknownKey   = "2"
 	channelsNum  = 3
 )
 
 var (
+	encKey = []byte("1234567891011121")
+
 	channel = bootstrap.Channel{
 		ID:       "1",
 		Name:     "name",
-		Metadata: `{"name":"value"}`,
+		Metadata: map[string]interface{}{"name": "value"},
 	}
 
 	config = bootstrap.Config{
@@ -49,35 +53,50 @@ var (
 	}
 )
 
-func newService(users mainflux.UsersServiceClient, url string) bootstrap.Service {
-	things := mocks.NewConfigsRepository(map[string]string{unknownID: unknownKey})
+func newService(auth mainflux.AuthNServiceClient, url string) bootstrap.Service {
+	things := mocks.NewConfigsRepository()
 	config := mfsdk.Config{
 		BaseURL: url,
 	}
 
 	sdk := mfsdk.NewSDK(config)
-	return bootstrap.New(users, things, sdk)
+	return bootstrap.New(auth, things, sdk, encKey)
 }
 
-func newThingsService(users mainflux.UsersServiceClient) things.Service {
+func newThingsService(auth mainflux.AuthNServiceClient) things.Service {
 	channels := make(map[string]things.Channel, channelsNum)
 	for i := 0; i < channelsNum; i++ {
 		id := strconv.Itoa(i + 1)
 		channels[id] = things.Channel{
 			ID:       id,
 			Owner:    email,
-			Metadata: `{"meta":"data"}`,
+			Metadata: map[string]interface{}{"meta": "data"},
 		}
 	}
 
-	return mocks.NewThingsService(map[string]things.Thing{}, channels, users)
+	return mocks.NewThingsService(map[string]things.Thing{}, channels, auth)
 }
 
 func newThingsServer(svc things.Service) *httptest.Server {
-	mux := httpapi.MakeHandler(svc)
+	mux := httpapi.MakeHandler(mocktracer.New(), svc)
 	return httptest.NewServer(mux)
 }
 
+func enc(in []byte) ([]byte, error) {
+	block, err := aes.NewCipher(encKey)
+	if err != nil {
+		return nil, err
+	}
+	ciphertext := make([]byte, aes.BlockSize+len(in))
+	iv := ciphertext[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		return nil, err
+	}
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(ciphertext[aes.BlockSize:], in)
+	return ciphertext, nil
+}
+
 func TestAdd(t *testing.T) {
 	users := mocks.NewUsersService(map[string]string{validToken: email})
 
@@ -95,38 +114,38 @@ func TestAdd(t *testing.T) {
 	cases := []struct {
 		desc   string
 		config bootstrap.Config
-		key    string
+		token  string
 		err    error
 	}{
 		{
 			desc:   "add a new config",
 			config: config,
-			key:    validToken,
+			token:  validToken,
 			err:    nil,
 		},
 		{
 			desc:   "add a config with an invalid ID",
 			config: neID,
-			key:    validToken,
+			token:  validToken,
 			err:    bootstrap.ErrNotFound,
 		},
 		{
 			desc:   "add a config with wrong credentials",
 			config: config,
-			key:    invalidToken,
+			token:  invalidToken,
 			err:    bootstrap.ErrUnauthorizedAccess,
 		},
 		{
 			desc:   "add a config with invalid list of channels",
 			config: wrongChannels,
-			key:    validToken,
+			token:  validToken,
 			err:    bootstrap.ErrMalformedEntity,
 		},
 	}
 
 	for _, tc := range cases {
-		_, err := svc.Add(tc.key, tc.config)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		_, err := svc.Add(tc.token, tc.config)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -140,34 +159,34 @@ func TestView(t *testing.T) {
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
 	cases := []struct {
-		desc string
-		id   string
-		key  string
-		err  error
+		desc  string
+		id    string
+		token string
+		err   error
 	}{
 		{
-			desc: "view an existing config",
-			id:   saved.MFThing,
-			key:  validToken,
-			err:  nil,
+			desc:  "view an existing config",
+			id:    saved.MFThing,
+			token: validToken,
+			err:   nil,
 		},
 		{
-			desc: "view a non-existing config",
-			id:   unknown,
-			key:  validToken,
-			err:  bootstrap.ErrNotFound,
+			desc:  "view a non-existing config",
+			id:    unknown,
+			token: validToken,
+			err:   bootstrap.ErrNotFound,
 		},
 		{
-			desc: "view a config with wrong credentials",
-			id:   config.MFThing,
-			key:  invalidToken,
-			err:  bootstrap.ErrUnauthorizedAccess,
+			desc:  "view a config with wrong credentials",
+			id:    config.MFThing,
+			token: invalidToken,
+			err:   bootstrap.ErrUnauthorizedAccess,
 		},
 	}
 
 	for _, tc := range cases {
-		_, err := svc.View(tc.key, tc.id)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		_, err := svc.View(tc.token, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -194,32 +213,90 @@ func TestUpdate(t *testing.T) {
 	cases := []struct {
 		desc   string
 		config bootstrap.Config
-		key    string
+		token  string
 		err    error
 	}{
 		{
 			desc:   "update a config with state Created",
 			config: modifiedCreated,
-			key:    validToken,
+			token:  validToken,
 			err:    nil,
 		},
 		{
 			desc:   "update a non-existing config",
 			config: nonExisting,
-			key:    validToken,
+			token:  validToken,
 			err:    bootstrap.ErrNotFound,
 		},
 		{
 			desc:   "update a config with wrong credentials",
 			config: saved,
-			key:    invalidToken,
+			token:  invalidToken,
 			err:    bootstrap.ErrUnauthorizedAccess,
 		},
 	}
 
 	for _, tc := range cases {
-		err := svc.Update(tc.key, tc.config)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		err := svc.Update(tc.token, tc.config)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+	}
+}
+
+func TestUpdateCert(t *testing.T) {
+	users := mocks.NewUsersService(map[string]string{validToken: email})
+
+	server := newThingsServer(newThingsService(users))
+	svc := newService(users, server.URL)
+	c := config
+
+	ch := channel
+	ch.ID = "2"
+	c.MFChannels = append(c.MFChannels, ch)
+	saved, err := svc.Add(validToken, c)
+	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
+
+	cases := []struct {
+		desc       string
+		token      string
+		thingKey   string
+		clientCert string
+		clientKey  string
+		caCert     string
+		err        error
+	}{
+		{
+			desc:       "update certs for the valid config",
+			thingKey:   saved.MFKey,
+			clientCert: "newCert",
+			clientKey:  "newKey",
+			caCert:     "newCert",
+			token:      validToken,
+			err:        nil,
+		},
+		{
+			desc:       "update cert for a non-existing config",
+			thingKey:   "empty",
+			clientCert: "newCert",
+			clientKey:  "newKey",
+			caCert:     "newCert",
+
+			token: validToken,
+			err:   bootstrap.ErrNotFound,
+		},
+		{
+			desc:       "update config cert with wrong credentials",
+			thingKey:   saved.MFKey,
+			clientCert: "newCert",
+			clientKey:  "newKey",
+			caCert:     "newCert",
+			token:      invalidToken,
+			err:        bootstrap.ErrUnauthorizedAccess,
+		},
+	}
+
+	for _, tc := range cases {
+		err := svc.UpdateCert(tc.token, tc.thingKey, tc.clientCert, tc.clientKey, tc.caCert)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -236,7 +313,9 @@ func TestUpdateConnections(t *testing.T) {
 	created, err := svc.Add(validToken, c)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
-	c.ExternalID = uuid.NewV4().String()
+	externalID, err := uuid.NewV4()
+	require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+	c.ExternalID = externalID.String()
 	active, err := svc.Add(validToken, c)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 	err = svc.ChangeState(validToken, active.MFThing, bootstrap.Active)
@@ -247,42 +326,42 @@ func TestUpdateConnections(t *testing.T) {
 
 	cases := []struct {
 		desc        string
-		key         string
+		token       string
 		id          string
 		connections []string
 		err         error
 	}{
 		{
-			desc:        "update connections for config with state Created",
-			key:         validToken,
+			desc:        "update connections for config with state Inactive",
+			token:       validToken,
 			id:          created.MFThing,
 			connections: []string{"2"},
 			err:         nil,
 		},
 		{
 			desc:        "update connections for config with state Active",
-			key:         validToken,
+			token:       validToken,
 			id:          active.MFThing,
 			connections: []string{"3"},
 			err:         nil,
 		},
 		{
 			desc:        "update connections for non-existing config",
-			key:         validToken,
+			token:       validToken,
 			id:          "",
 			connections: []string{"3"},
 			err:         bootstrap.ErrNotFound,
 		},
 		{
 			desc:        "update connections with invalid channels",
-			key:         validToken,
+			token:       validToken,
 			id:          created.MFThing,
 			connections: []string{"wrong"},
 			err:         bootstrap.ErrMalformedEntity,
 		},
 		{
 			desc:        "update connections a config with wrong credentials",
-			key:         invalidToken,
+			token:       invalidToken,
 			id:          created.MFKey,
 			connections: []string{"2", "3"},
 			err:         bootstrap.ErrUnauthorizedAccess,
@@ -290,8 +369,8 @@ func TestUpdateConnections(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		err := svc.UpdateConnections(tc.key, tc.id, tc.connections)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		err := svc.UpdateConnections(tc.token, tc.id, tc.connections)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -305,9 +384,10 @@ func TestList(t *testing.T) {
 	var saved []bootstrap.Config
 	for i := 0; i < numThings; i++ {
 		c := config
-		id := uuid.NewV4().String()
-		c.ExternalID = id
-		c.ExternalKey = id
+		id, err := uuid.NewV4()
+		require.Nil(t, err, fmt.Sprintf("Got unexpected error: %s.\n", err))
+		c.ExternalID = id.String()
+		c.ExternalKey = id.String()
 		c.Name = fmt.Sprintf("%s-%d", config.Name, i)
 		s, err := svc.Add(validToken, c)
 		saved = append(saved, s)
@@ -318,18 +398,13 @@ func TestList(t *testing.T) {
 	require.Nil(t, err, fmt.Sprintf("Changing config state expected to succeed: %s.\n", err))
 	saved[41].State = bootstrap.Active
 
-	unknownConfig := bootstrap.Config{
-		ExternalID:  unknownID,
-		ExternalKey: unknownKey,
-	}
-
 	cases := []struct {
 		desc   string
 		config bootstrap.ConfigsPage
 		filter bootstrap.Filter
 		offset uint64
 		limit  uint64
-		key    string
+		token  string
 		err    error
 	}{
 		{
@@ -341,7 +416,7 @@ func TestList(t *testing.T) {
 				Configs: saved[0:10],
 			},
 			filter: bootstrap.Filter{},
-			key:    validToken,
+			token:  validToken,
 			offset: 0,
 			limit:  10,
 			err:    nil,
@@ -355,7 +430,7 @@ func TestList(t *testing.T) {
 				Configs: saved[95:96],
 			},
 			filter: bootstrap.Filter{PartialMatch: map[string]string{"name": "95"}},
-			key:    validToken,
+			token:  validToken,
 			offset: 0,
 			limit:  100,
 			err:    nil,
@@ -364,7 +439,7 @@ func TestList(t *testing.T) {
 			desc:   "list configs unauthorized",
 			config: bootstrap.ConfigsPage{},
 			filter: bootstrap.Filter{},
-			key:    invalidToken,
+			token:  invalidToken,
 			offset: 0,
 			limit:  10,
 			err:    bootstrap.ErrUnauthorizedAccess,
@@ -378,7 +453,7 @@ func TestList(t *testing.T) {
 				Configs: saved[95:],
 			},
 			filter: bootstrap.Filter{},
-			key:    validToken,
+			token:  validToken,
 			offset: 95,
 			limit:  10,
 			err:    nil,
@@ -392,32 +467,18 @@ func TestList(t *testing.T) {
 				Configs: []bootstrap.Config{saved[41]},
 			},
 			filter: bootstrap.Filter{FullMatch: map[string]string{"state": bootstrap.Active.String()}},
-			key:    validToken,
+			token:  validToken,
 			offset: 35,
 			limit:  20,
 			err:    nil,
 		},
-		{
-			desc: "list unknown configs",
-			config: bootstrap.ConfigsPage{
-				Total:   1,
-				Offset:  0,
-				Limit:   20,
-				Configs: []bootstrap.Config{unknownConfig},
-			},
-			filter: bootstrap.Filter{Unknown: true},
-			key:    validToken,
-			offset: 0,
-			limit:  20,
-			err:    nil,
-		},
 	}
 
 	for _, tc := range cases {
-		result, err := svc.List(tc.key, tc.filter, tc.offset, tc.limit)
+		result, err := svc.List(tc.token, tc.filter, tc.offset, tc.limit)
 		assert.ElementsMatch(t, tc.config.Configs, result.Configs, fmt.Sprintf("%s: expected %v got %v", tc.desc, tc.config.Configs, result.Configs))
 		assert.Equal(t, tc.config.Total, result.Total, fmt.Sprintf("%s: expected %v got %v", tc.desc, tc.config.Total, result.Total))
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -431,40 +492,40 @@ func TestRemove(t *testing.T) {
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
 	cases := []struct {
-		desc string
-		id   string
-		key  string
-		err  error
+		desc  string
+		id    string
+		token string
+		err   error
 	}{
 		{
-			desc: "view a config with wrong credentials",
-			id:   saved.MFThing,
-			key:  invalidToken,
-			err:  bootstrap.ErrUnauthorizedAccess,
+			desc:  "view a config with wrong credentials",
+			id:    saved.MFThing,
+			token: invalidToken,
+			err:   bootstrap.ErrUnauthorizedAccess,
 		},
 		{
-			desc: "remove an existing config",
-			id:   saved.MFThing,
-			key:  validToken,
-			err:  nil,
+			desc:  "remove an existing config",
+			id:    saved.MFThing,
+			token: validToken,
+			err:   nil,
 		},
 		{
-			desc: "remove removed config",
-			id:   saved.MFThing,
-			key:  validToken,
-			err:  nil,
+			desc:  "remove removed config",
+			id:    saved.MFThing,
+			token: validToken,
+			err:   nil,
 		},
 		{
-			desc: "remove non-existing config",
-			id:   unknown,
-			key:  validToken,
-			err:  nil,
+			desc:  "remove non-existing config",
+			id:    unknown,
+			token: validToken,
+			err:   nil,
 		},
 	}
 
 	for _, tc := range cases {
-		err := svc.Remove(tc.key, tc.id)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		err := svc.Remove(tc.token, tc.id)
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -477,12 +538,16 @@ func TestBootstrap(t *testing.T) {
 	saved, err := svc.Add(validToken, config)
 	require.Nil(t, err, fmt.Sprintf("Saving config expected to succeed: %s.\n", err))
 
+	e, err := enc([]byte(saved.ExternalKey))
+	require.Nil(t, err, fmt.Sprintf("Encrypting external key expected to succeed: %s.\n", err))
+
 	cases := []struct {
 		desc        string
 		config      bootstrap.Config
 		externalKey string
 		externalID  string
 		err         error
+		encrypted   bool
 	}{
 		{
 			desc:        "bootstrap using invalid external id",
@@ -490,6 +555,7 @@ func TestBootstrap(t *testing.T) {
 			externalID:  "invalid",
 			externalKey: saved.ExternalKey,
 			err:         bootstrap.ErrNotFound,
+			encrypted:   false,
 		},
 		{
 			desc:        "bootstrap using invalid external key",
@@ -497,6 +563,7 @@ func TestBootstrap(t *testing.T) {
 			externalID:  saved.ExternalID,
 			externalKey: "invalid",
 			err:         bootstrap.ErrNotFound,
+			encrypted:   false,
 		},
 		{
 			desc:        "bootstrap an existing config",
@@ -504,13 +571,22 @@ func TestBootstrap(t *testing.T) {
 			externalID:  saved.ExternalID,
 			externalKey: saved.ExternalKey,
 			err:         nil,
+			encrypted:   false,
+		},
+		{
+			desc:        "bootstrap encrypted",
+			config:      saved,
+			externalID:  saved.ExternalID,
+			externalKey: hex.EncodeToString(e),
+			err:         nil,
+			encrypted:   true,
 		},
 	}
 
 	for _, tc := range cases {
-		config, err := svc.Bootstrap(tc.externalKey, tc.externalID)
+		config, err := svc.Bootstrap(tc.externalKey, tc.externalID, tc.encrypted)
 		assert.Equal(t, tc.config, config, fmt.Sprintf("%s: expected %v got %v\n", tc.desc, tc.config, config))
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -527,49 +603,49 @@ func TestChangeState(t *testing.T) {
 		desc  string
 		state bootstrap.State
 		id    string
-		key   string
+		token string
 		err   error
 	}{
 		{
 			desc:  "change state with wrong credentials",
 			state: bootstrap.Active,
 			id:    saved.MFThing,
-			key:   invalidToken,
+			token: invalidToken,
 			err:   bootstrap.ErrUnauthorizedAccess,
 		},
 		{
 			desc:  "change state of non-existing config",
 			state: bootstrap.Active,
 			id:    unknown,
-			key:   validToken,
+			token: validToken,
 			err:   bootstrap.ErrNotFound,
 		},
 		{
 			desc:  "change state to Active",
 			state: bootstrap.Active,
 			id:    saved.MFThing,
-			key:   validToken,
+			token: validToken,
 			err:   nil,
 		},
 		{
 			desc:  "change state to current state",
 			state: bootstrap.Active,
 			id:    saved.MFThing,
-			key:   validToken,
+			token: validToken,
 			err:   nil,
 		},
 		{
 			desc:  "change state to Inactive",
 			state: bootstrap.Inactive,
 			id:    saved.MFThing,
-			key:   validToken,
+			token: validToken,
 			err:   nil,
 		},
 	}
 
 	for _, tc := range cases {
-		err := svc.ChangeState(tc.key, tc.id, tc.state)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		err := svc.ChangeState(tc.token, tc.id, tc.state)
+		assert.True(t, errors.Contains(err, tc.err), err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -584,7 +660,7 @@ func TestUpdateChannelHandler(t *testing.T) {
 	ch := bootstrap.Channel{
 		ID:       channel.ID,
 		Name:     "new name",
-		Metadata: "new meta",
+		Metadata: map[string]interface{}{"meta": "new"},
 	}
 
 	cases := []struct {
@@ -606,7 +682,7 @@ func TestUpdateChannelHandler(t *testing.T) {
 
 	for _, tc := range cases {
 		err := svc.UpdateChannelHandler(tc.channel)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -638,7 +714,7 @@ func TestRemoveChannelHandler(t *testing.T) {
 
 	for _, tc := range cases {
 		err := svc.RemoveChannelHandler(tc.id)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -657,7 +733,7 @@ func TestRemoveCoinfigHandler(t *testing.T) {
 		err  error
 	}{
 		{
-			desc: "remove an existing conifg",
+			desc: "remove an existing config",
 			id:   saved.MFThing,
 			err:  nil,
 		},
@@ -670,7 +746,7 @@ func TestRemoveCoinfigHandler(t *testing.T) {
 
 	for _, tc := range cases {
 		err := svc.RemoveConfigHandler(tc.id)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }
 
@@ -696,7 +772,7 @@ func TestDisconnectThingsHandler(t *testing.T) {
 			err:       nil,
 		},
 		{
-			desc:      "disconnect dicsonnected",
+			desc:      "disconnect disconnected",
 			channelID: channel.ID,
 			thingID:   saved.MFThing,
 			err:       nil,
@@ -705,6 +781,6 @@ func TestDisconnectThingsHandler(t *testing.T) {
 
 	for _, tc := range cases {
 		err := svc.DisconnectThingHandler(tc.channelID, tc.thingID)
-		assert.Equal(t, tc.err, err, fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
+		assert.True(t, errors.Contains(err, tc.err), fmt.Sprintf("%s: expected %s got %s\n", tc.desc, tc.err, err))
 	}
 }

bootstrap/state.go

@@ -1,9 +1,5 @@
-//
-// Copyright (c) 2018
-// Mainflux
-//
+// Copyright (c) Mainflux
 // SPDX-License-Identifier: Apache-2.0
-//
 
 package bootstrap
 
@@ -18,9 +14,9 @@ const (
 
 // State represents corresponding Mainflux Thing state. The possible Config States
 // as well as description of what that State represents are given in the table:
-// | State    | What it means 		                                                           |
+// | State    | What it means                                                                  |
 // |----------+--------------------------------------------------------------------------------|
-// | Inactive | Thing is created, but isn't able to communicate over Mainflux 				   |
+// | Inactive | Thing is created, but isn't able to communicate over Mainflux                  |
 // | Active   | Thing is able to communicate using Mainflux                                    |
 type State int
 

bootstrap/swagger.yml

@@ -1,438 +0,0 @@
-swagger: "2.0"
-info:
-  title: Mainflux Bootstrap service
-  description: HTTP API for managing platform devices and applications configuration.
-  version: "1.0.0"
-consumes:
-  - "application/json"
-produces:
-  - "application/json"
-paths:
-  /things/configs:
-    post:
-      summary: Adds new config
-      description: |
-        Adds new config to the list of config owned by user identified using
-        the provided access token.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - name: config
-          description: JSON-formatted document describing the new config.
-          in: body
-          schema:
-            $ref: "#/definitions/ConfigReq"
-          required: true
-      responses:
-        201:
-          description: Config registered.
-          headers:
-            Location:
-              type: string
-              description: Created config's relative URL (i.e. /things/configs/{configId}).
-        400:
-          description: Failed due to malformed JSON.
-        403:
-          description: Missing or invalid access token provided.
-        415:
-          description: Missing or invalid content type.
-        500:
-          $ref: "#/responses/ServiceError"
-    get:
-      summary: Retrieves managed configs
-      description: |
-        Retrieves a list of managed configs. Due to performance concerns, data
-        is retrieved in subsets. The API configs must ensure that the entire
-        dataset is consumed either by making subsequent requests, or by
-        increasing the subset size of the initial request.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/Limit"
-        - $ref: "#/parameters/Offset"
-        - $ref: "#/parameters/State"
-        - $ref: "#/parameters/Name"
-      responses:
-        200:
-          description: | 
-            Data retrieved. Configs from this list don't contain channels.
-          schema:
-            $ref: "#/definitions/ConfigList"
-        400:
-          description: Failed due to malformed query parameters.
-        403:
-          description: Missing or invalid access token provided.
-        500:
-          $ref: "#/responses/ServiceError"
-  /things/bootstrap/{externalId}:
-    get:
-      summary: Retrieves configuration
-      description: |
-        Retrieves a configuration with given external ID and external key.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/ConfigAuthorization"
-        - $ref: "#/parameters/ExternalId"
-      responses:
-        200:
-          description: Data retrieved.
-          schema:
-            $ref: "#/definitions/BootstrapRes"
-        404:
-          description: |
-            Failed to retrieve corresponding config. Thing which attempted
-            to bootstrap is saved as an unknown Thing and can be listed and
-            added to the service later.
-        500:
-          $ref: "#/responses/ServiceError"
-  /things/configs/{configId}:
-    get:
-      summary: Retrieves config info (with channels)
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/ConfigId"
-      responses:
-        200:
-          description: Data retrieved.
-          schema:
-            $ref: "#/definitions/ConfigRes"
-        403:
-          description: Missing or invalid access token provided.
-        404:
-          description: Config does not exist.
-        500:
-          $ref: "#/responses/ServiceError"
-    put:
-      summary: Updates config info
-      description: |
-        Update is performed by replacing the current resource data with values
-        provided in a request payload. Note that the owner, ID, external ID,
-        external key, Mainflux Thing ID and key cannot be changed.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/ConfigId"
-        - name: config
-          description: JSON-formatted document describing the updated thing.
-          in: body
-          schema:
-            $ref: "#/definitions/ConfigUpdateReq"
-          required: true
-      responses:
-        200:
-          description: Config updated.
-        400:
-          description: Failed due to malformed JSON.
-        403:
-          description: Missing or invalid access token provided.
-        404:
-          description: Config does not exist.
-        415:
-          description: Missing or invalid content type.
-        500:
-          $ref: "#/responses/ServiceError"
-    delete:
-      summary: Removes a Config
-      description: |
-        Removes a Config. In case of successfull removal the service will ensure
-        that the removed config is disconnected from all of the Maifnlux channels.
-      tags:
-        - confgis
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/ConfigId"
-      responses:
-        204:
-          description: Config removed.
-        400:
-          description: Failed due to malformed config's ID.
-        403:
-          description: Missing or invalid access token provided.
-        500:
-          $ref: "#/responses/ServiceError"
-  /things/configs/connections/{configId}:
-    put:
-      summary: Updates channels the thing is connected to
-      description: |
-        Update connections performs update of the channel list corresponding 
-        Thing is connected to.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/ConfigId"
-        - name: channels
-          description: Array if IDs the thing is be connected to.
-          in: body
-          schema:
-            type: array
-            items:
-              type: string
-          required: true
-      responses:
-        200:
-          description: Config updated.
-        400:
-          description: Failed due to malformed JSON.
-        403:
-          description: Missing or invalid access token provided.
-        404:
-          description: Config does not exist.
-        415:
-          description: Missing or invalid content type.
-        500:
-          $ref: "#/responses/ServiceError"
-  /things/state/{configId}:
-    put:
-      summary: Updates Config state.
-      description: |
-        Updating state represents enabling/disabling Config, i.e. connecting
-        and disconnecting corresponding Mainflux Thing to the list of Channels.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/ConfigId"
-        - name: state
-          description: New state of the Config.
-          in: body
-          schema:
-            type: object
-            properties:
-              state:
-                type: integer
-                enum:
-                  - inactive
-                  - active
-      responses:
-        204:
-          description: Config removed.
-        400:
-          description: Failed due to malformed config's ID.
-        403:
-          description: Missing or invalid access token provided.
-        500:
-          $ref: "#/responses/ServiceError"
-  /things/unknown/configs:
-    get:
-      summary: Get a list of unsucessfully bootstrapped Things
-      description: |
-        Retrieves a list of unknown configs. Due to performance concerns, data
-        is retrieved in subsets. The API configs must ensure that the entire
-        dataset is consumed either by making subsequent requests, or by
-        increasing the subset size of the initial request.
-      tags:
-        - configs
-      parameters:
-        - $ref: "#/parameters/Authorization"
-        - $ref: "#/parameters/Limit"
-        - $ref: "#/parameters/Offset"
-      responses:
-        200:
-          description: Data retrieved.
-          schema:
-            $ref: "#/definitions/ConfigList"
-        400:
-          description: Failed due to malformed query parameters.
-        403:
-          description: Missing or invalid access token provided.
-        500:
-          $ref: "#/responses/ServiceError"
-
-parameters:
-  Authorization:
-    name: Authorization
-    description: User's access token.
-    in: header
-    type: string
-    required: true
-  ConfigAuthorization:
-    name: configAuthorization
-    description: Configuration external key.
-    in: header
-    type: string
-    required: true
-  ConfigId:
-    name: configId
-    description: Unique Config identifier.
-    in: path
-    type: integer
-    minimum: 1
-    required: true
-  ExternalId:
-    name: externalId
-    description: Unique Config identifier provided by external entity.
-    in: path
-    type: string
-    required: true
-  Limit:
-    name: limit
-    description: Size of the subset to retrieve.
-    in: query
-    type: integer
-    default: 10
-    maximum: 100
-    minimum: 1
-    required: false
-  Offset:
-    name: offset
-    description: Number of items to skip during retrieval.
-    in: query
-    type: integer
-    default: 0
-    minimum: 0
-    required: false
-  State:
-    name: state
-    description: A state of items
-    in: query
-    type: integer
-    enum:
-      - inactive
-      - active
-    required: false
-  Name:
-    name: name
-    description: Name of the config. Search by name is partial-match and case-insensitive.
-    in: query
-    type: string
-    required: false
-
-responses:
-  ServiceError:
-    description: Unexpected server-side error occured.
-
-definitions:
-  ConfigList:
-    type: object
-    properties:
-      total:
-        type: integer
-        description: Total number of results.
-        minimum: 0
-      offset:
-        type: integer
-        description: Number of items to skip during retrieval.
-        minimum: 0
-        default: 0
-      limit:
-        type: integer
-        description: Size of the subset to retrieve.
-        maximum: 100
-        default: 10
-      configs:
-        type: array
-        minItems: 0
-        uniqueItems: true
-        items:
-          $ref: "#/definitions/ConfigRes"
-    required:
-      - confgis
-  State:
-    type: integer
-    enum:
-      - active
-      - inactive
-  ConfigRes:
-    type: object
-    properties:
-      mainflux_thing:
-        type: string
-        description: Corresponding Mainflux Thing ID.
-      mainflux_key:
-        type: string
-        description: Corresponding Mainflux Thing key.
-      mainflux_channels:
-        type: array
-        minItems: 0
-        items:
-          type: object
-          properties:
-            id:
-              type: string
-              description: ID of the Channel.
-            name:
-              type: string
-              description: Name of the Channel.
-            metadata:
-              type: object
-              description: Custom metadata related to the Channel.
-      external_id:
-        type: string
-        description: External ID (MAC address or some uinque identifier).
-      external_key:
-        type: string
-        description: External key.
-      content:
-        type: string
-        description: Free-form custom configuration
-      state:
-        $ref: '#/definitions/State'
-    required:
-      - external_id
-      - external_key
-  BootstrapRes:
-      type: object
-      properties:
-        mainflux_thing:
-          type: string
-          description: Corresponding Mainflux Thing ID.
-        mainflux_key:
-          type: string
-          description: Corresponding Mainflux Thing key.
-        mainflux_channels:
-          type: array
-          minItems: 0
-          items:
-            type: string
-        content:
-          type: string
-          description: Free-form custom configuration
-      required:
-        - mainflux_thing
-        - mainflux_key
-        - mainflux_channels
-        - content
-  ConfigReq:
-    type: object
-    properties:
-      external_id:
-        type: string
-        description: External ID (MAC address or some uinque identifier).
-      external_key:
-        type: string
-        description: External key.
-      thing_id:
-        type: string
-        description: ID of the corresponding Mainflux Thing.
-      channels:
-        type: array
-        minItems: 0
-        items:
-          type: string
-      content:
-        type: string
-    required:
-      - external_id
-      - external_key
-  ConfigUpdateReq:
-    type: object
-    properties:
-      channels:
-        type: array
-        minItems: 0
-        items:
-          type: string
-      content:
-        type: string
-      name:
-        type: string
-    required:
-      - content
-      - name

certs/README.md

@@ -0,0 +1,53 @@
+# Certs Service
+Issues certificates for things. `Certs` service can create certificates to be used when `Mainflux` is deployed to support mTLS.
+Certificate service can create certificates in two modes:
+1. Development mode - to be used when no PKI is deployed, this works similar to the [make thing_cert](../docker/ssl/Makefile)
+2. PKI mode - certificates issued by PKI, when you deploy `Vault` as PKI certificate management `cert` service will proxy requests to `Vault` previously checking access rights and saving info on successfully created certificate. 
+   
+## Development mode
+If `MF_CERTS_VAULT_HOST` is empty than Development mode is on.
+
+To issue a certificate:
+```bash
+
+TOK=`curl  -s --insecure -S -X POST http://localhost/tokens -H 'Content-Type: application/json' -d '{"email":"edge@email.com","password":"12345678"}' | jq -r '.token'`
+
+curl -s -S  -X POST  http://localhost:8204/certs -H "Authorization: $TOK" -H 'Content-Type: application/json'   -d '{"thing_id":<thing_id>, "rsa_bits":2048, "key_type":"rsa"}'
+```
+
+```json
+{
+  "ThingID": "",
+  "ClientCert": "-----BEGIN CERTIFICATE-----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\nDUMdvYwgj0cUCEu3LA==\n-----END CERTIFICATE-----\n",
+  "IssuingCA": "",
+  "CAChain": null,
+  "ClientKey": "-----BEGIN RSA PRIVATE KEY-----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\nea7KQHTfTdRhOLUzW2yVqLi9pzfTfA6Yqf3U1YD3bgnWrp1VQnjo\n-----END RSA PRIVATE KEY-----\n",
+  "PrivateKeyType": "",
+  "Serial": "",
+  "Expire": "0001-01-01T00:00:00Z"
+}
+```
+
+## PKI mode
+
+When `MF_CERTS_VAULT_HOST` is set it is presumed that `Vault` is installed and `certs` service will issue certificates using `Vault` API.
+First you'll need to set up `Vault`. 
+To setup `Vault` follow steps in [Build Your Own Certificate Authority (CA)](https://learn.hashicorp.com/tutorials/vault/pki-engine).
+
+To setup certs service with `Vault` following environment variables must be set:
+
+```
+MF_CERTS_VAULT_HOST=vault-domain.com
+MF_CERTS_VAULT_PKI_PATH=<vault_pki_path>
+MF_CERTS_VAULT_ROLE=<vault_role>
+MF_CERTS_VAULT_TOKEN=<vault_acces_token>
+```
+
+For lab purposes you can use docker-compose and script for setting up PKI in [https://github.com/mteodor/vault](https://github.com/mteodor/vault)
+
+Issuing certificate is same as in **Development** mode.
+In this mode certificates can also be revoked:
+
+```bash
+curl -s -S -X DELETE http://localhost:8204/certs/revoke -H "Authorization: $TOK" -H 'Content-Type: application/json'   -d '{"thing_id":"c30b8842-507c-4bcd-973c-74008cef3be5"}'
+```

certs/api/doc.go

@@ -0,0 +1,5 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package api contains implementation of certs service HTTP API.
+package api

certs/api/endpoint.go

@@ -0,0 +1,68 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+
+	"github.com/go-kit/kit/endpoint"
+	"github.com/mainflux/mainflux/certs"
+)
+
+func issueCert(svc certs.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(addCertsReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+		res, err := svc.IssueCert(ctx, req.token, req.ThingID, req.Valid, req.KeyBits, req.KeyType)
+		if err != nil {
+			return certsResponse{Error: err.Error()}, nil
+		}
+		return res, nil
+	}
+}
+
+func listCerts(svc certs.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(listReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+
+		page, err := svc.ListCerts(ctx, req.token, req.offset, req.limit)
+		if err != nil {
+			return certsPageRes{
+				Error: err.Error(),
+			}, err
+		}
+		res := certsPageRes{
+			pageRes: pageRes{
+				Total:  page.Total,
+				Offset: page.Offset,
+				Limit:  page.Limit,
+			},
+			Certs: []certsResponse{},
+		}
+
+		for _, cert := range page.Certs {
+			view := certsResponse{
+				Serial:  cert.Serial,
+				ThingID: cert.ThingID,
+			}
+			res.Certs = append(res.Certs, view)
+		}
+		return res, nil
+	}
+}
+
+func revokeCert(svc certs.Service) endpoint.Endpoint {
+	return func(ctx context.Context, request interface{}) (interface{}, error) {
+		req := request.(revokeReq)
+		if err := req.validate(); err != nil {
+			return nil, err
+		}
+		return svc.RevokeCert(ctx, req.token, req.ThingID)
+	}
+}

certs/api/logging.go

@@ -0,0 +1,64 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/mainflux/mainflux/certs"
+	log "github.com/mainflux/mainflux/logger"
+)
+
+var _ certs.Service = (*loggingMiddleware)(nil)
+
+type loggingMiddleware struct {
+	logger log.Logger
+	svc    certs.Service
+}
+
+// NewLoggingMiddleware adds logging facilities to the core service.
+func NewLoggingMiddleware(svc certs.Service, logger log.Logger) certs.Service {
+	return &loggingMiddleware{logger, svc}
+}
+
+func (lm *loggingMiddleware) IssueCert(ctx context.Context, token, thingID, daysValid string, keyBits int, keyType string) (c certs.Cert, err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method issue_cert for token: %s and thing: %s took %s to complete", token, thingID, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.IssueCert(ctx, token, thingID, daysValid, keyBits, keyType)
+}
+
+func (lm *loggingMiddleware) ListCerts(ctx context.Context, token string, offset, limit uint64) (cp certs.Page, err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method list_certs for token: %s took %s to complete", token, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.ListCerts(ctx, token, offset, limit)
+}
+
+func (lm *loggingMiddleware) RevokeCert(ctx context.Context, token, thingID string) (c certs.Revoke, err error) {
+	defer func(begin time.Time) {
+		message := fmt.Sprintf("Method revoke_cert for token: %s and thing: %s took %s to complete", token, thingID, time.Since(begin))
+		if err != nil {
+			lm.logger.Warn(fmt.Sprintf("%s with error: %s.", message, err))
+			return
+		}
+		lm.logger.Info(fmt.Sprintf("%s without errors.", message))
+	}(time.Now())
+
+	return lm.svc.RevokeCert(ctx, token, thingID)
+}

certs/api/metrics.go

@@ -0,0 +1,57 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/metrics"
+	"github.com/mainflux/mainflux/certs"
+)
+
+var _ certs.Service = (*metricsMiddleware)(nil)
+
+type metricsMiddleware struct {
+	counter metrics.Counter
+	latency metrics.Histogram
+	svc     certs.Service
+}
+
+// MetricsMiddleware instruments core service by tracking request count and
+// latency.
+func MetricsMiddleware(svc certs.Service, counter metrics.Counter, latency metrics.Histogram) certs.Service {
+	return &metricsMiddleware{
+		counter: counter,
+		latency: latency,
+		svc:     svc,
+	}
+}
+
+func (ms *metricsMiddleware) IssueCert(ctx context.Context, token, thingID string, daysValid string, keyBits int, keyType string) (certs.Cert, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "issue_cert").Add(1)
+		ms.latency.With("method", "issue_cert").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.IssueCert(ctx, token, thingID, daysValid, keyBits, keyType)
+}
+
+func (ms *metricsMiddleware) ListCerts(ctx context.Context, token string, offset, limit uint64) (certs.Page, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "list_certs").Add(1)
+		ms.latency.With("method", "list_certs").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.ListCerts(ctx, token, offset, limit)
+}
+
+func (ms *metricsMiddleware) RevokeCert(ctx context.Context, token, thingID string) (certs.Revoke, error) {
+	defer func(begin time.Time) {
+		ms.counter.With("method", "revoke_cert").Add(1)
+		ms.latency.With("method", "revoke_cert").Observe(time.Since(begin).Seconds())
+	}(time.Now())
+
+	return ms.svc.RevokeCert(ctx, token, thingID)
+}

certs/api/requests.go

@@ -0,0 +1,52 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import "github.com/mainflux/mainflux/certs"
+
+const maxLimitSize = 100
+
+type addCertsReq struct {
+	token   string
+	ThingID string `json:"thing_id"`
+	KeyBits int    `json:"key_bits"`
+	KeyType string `json:"key_type"`
+	Valid   string `json:"valid"`
+}
+
+func (req addCertsReq) validate() error {
+	if req.ThingID == "" && req.token == "" {
+		return errUnauthorized
+	}
+	return nil
+}
+
+type listReq struct {
+	token  string
+	offset uint64
+	limit  uint64
+}
+
+func (req *listReq) validate() error {
+	if req.token == "" {
+		return certs.ErrUnauthorizedAccess
+	}
+	if req.limit == 0 || req.limit > maxLimitSize {
+		return certs.ErrMalformedEntity
+	}
+	return nil
+}
+
+type revokeReq struct {
+	token   string
+	ThingID string `json:"thing_id"`
+}
+
+func (req *revokeReq) validate() error {
+	if req.token == "" || req.ThingID == "" {
+		return certs.ErrUnauthorizedAccess
+	}
+
+	return nil
+}

certs/api/responses.go

@@ -0,0 +1,53 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"net/http"
+)
+
+type pageRes struct {
+	Total  uint64 `json:"total"`
+	Offset uint64 `json:"offset"`
+	Limit  uint64 `json:"limit"`
+}
+
+type certsPageRes struct {
+	pageRes
+	Certs []certsResponse `json:"certs"`
+	Error string          `json:"error,omitempty"`
+}
+
+type certsResponse struct {
+	ClientCert map[string]string `json:"client_cert"`
+	ClientKey  map[string]string `json:"client_key"`
+	Serial     string            `json:"serial"`
+	ThingID    string            `json:"thing_id"`
+	CACert     string            `json:"ca_cert"`
+	Error      string            `json:"error"`
+}
+
+func (res certsPageRes) Code() int {
+	return http.StatusCreated
+}
+
+func (res certsPageRes) Headers() map[string]string {
+	return map[string]string{}
+}
+
+func (res certsPageRes) Empty() bool {
+	return false
+}
+
+func (res certsResponse) Code() int {
+	return http.StatusCreated
+}
+
+func (res certsResponse) Headers() map[string]string {
+	return map[string]string{}
+}
+
+func (res certsResponse) Empty() bool {
+	return false
+}

certs/api/transport.go

@@ -0,0 +1,174 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+
+	"github.com/mainflux/mainflux/certs"
+	"github.com/mainflux/mainflux/pkg/errors"
+
+	kithttp "github.com/go-kit/kit/transport/http"
+	"github.com/go-zoo/bone"
+	"github.com/mainflux/mainflux"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+const (
+	contentType = "application/json"
+	offset      = "offset"
+	limit       = "limit"
+
+	defOffset = 0
+	defLimit  = 10
+)
+
+var (
+	errUnsupportedContentType = errors.New("unsupported content type")
+	errUnauthorized           = errors.New("missing or invalid credentials provided")
+	errInvalidQueryParams     = errors.New("invalid query params")
+	errMalformedEntity        = errors.New("malformed entity")
+	errConflict               = errors.New("entity already exists")
+)
+
+// MakeHandler returns a HTTP handler for API endpoints.
+func MakeHandler(svc certs.Service) http.Handler {
+	opts := []kithttp.ServerOption{
+		kithttp.ServerErrorEncoder(encodeError),
+	}
+
+	r := bone.New()
+
+	r.Post("/certs", kithttp.NewServer(
+		issueCert(svc),
+		decodeCerts,
+		encodeResponse,
+		opts...,
+	))
+
+	r.Get("/certs", kithttp.NewServer(
+		listCerts(svc),
+		decodeListCerts,
+		encodeResponse,
+		opts...,
+	))
+
+	r.Delete("/certs/revoke", kithttp.NewServer(
+		revokeCert(svc),
+		decodeRevokeCerts,
+		encodeResponse,
+		opts...,
+	))
+
+	r.Handle("/metrics", promhttp.Handler())
+	r.GetFunc("/version", mainflux.Version("certs"))
+
+	return r
+}
+
+func encodeResponse(_ context.Context, w http.ResponseWriter, response interface{}) error {
+	w.Header().Set("Content-Type", contentType)
+
+	if ar, ok := response.(mainflux.Response); ok {
+		for k, v := range ar.Headers() {
+			w.Header().Set(k, v)
+		}
+
+		w.WriteHeader(ar.Code())
+
+		if ar.Empty() {
+			return nil
+		}
+	}
+
+	return json.NewEncoder(w).Encode(response)
+}
+
+func decodeListCerts(_ context.Context, r *http.Request) (interface{}, error) {
+	l, err := readUintQuery(r, limit, defLimit)
+	if err != nil {
+		return nil, err
+	}
+	o, err := readUintQuery(r, offset, defOffset)
+	if err != nil {
+		return nil, err
+	}
+	req := listReq{
+		token:  r.Header.Get("Authorization"),
+		limit:  l,
+		offset: o,
+	}
+	return req, nil
+}
+
+func readUintQuery(r *http.Request, key string, def uint64) (uint64, error) {
+	vals := bone.GetQuery(r, key)
+	if len(vals) > 1 {
+		return 0, errInvalidQueryParams
+	}
+
+	if len(vals) == 0 {
+		return def, nil
+	}
+
+	strval := vals[0]
+	val, err := strconv.ParseUint(strval, 10, 64)
+	if err != nil {
+		return 0, errInvalidQueryParams
+	}
+
+	return val, nil
+}
+
+func decodeCerts(_ context.Context, r *http.Request) (interface{}, error) {
+	if r.Header.Get("Content-Type") != contentType {
+		return nil, errUnsupportedContentType
+	}
+
+	req := addCertsReq{token: r.Header.Get("Authorization")}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		return nil, err
+	}
+
+	return req, nil
+}
+
+func decodeRevokeCerts(_ context.Context, r *http.Request) (interface{}, error) {
+	if r.Header.Get("Content-Type") != contentType {
+		return nil, errUnsupportedContentType
+	}
+
+	req := revokeReq{token: r.Header.Get("Authorization")}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		return nil, err
+	}
+
+	return req, nil
+}
+
+func encodeError(_ context.Context, err error, w http.ResponseWriter) {
+	w.Header().Set("Content-Type", contentType)
+
+	switch err {
+	case errUnsupportedContentType:
+		w.WriteHeader(http.StatusUnsupportedMediaType)
+	case io.EOF, errMalformedEntity:
+		w.WriteHeader(http.StatusBadRequest)
+	case errConflict:
+		w.WriteHeader(http.StatusConflict)
+	default:
+		switch err.(type) {
+		case *json.SyntaxError:
+			w.WriteHeader(http.StatusBadRequest)
+		case *json.UnmarshalTypeError:
+			w.WriteHeader(http.StatusBadRequest)
+		default:
+			w.WriteHeader(http.StatusInternalServerError)
+		}
+	}
+}

certs/certs.go

@@ -0,0 +1,29 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package certs
+
+import "context"
+
+// ConfigsPage contains page related metadata as well as list
+type Page struct {
+	Total  uint64
+	Offset uint64
+	Limit  uint64
+	Certs  []Cert
+}
+
+// Repository specifies a Config persistence API.
+type Repository interface {
+	// Save  saves cert for thing into database
+	Save(ctx context.Context, cert Cert) (string, error)
+
+	// RetrieveAll retrieve all issued certificates for given owner
+	RetrieveAll(ctx context.Context, ownerID string, offset, limit uint64) (Page, error)
+
+	// Remove certificate from DB for given thing
+	Remove(ctx context.Context, thingID string) error
+
+	// RetrieveByThing certificate by given thing
+	RetrieveByThing(ctx context.Context, thingID string) (Cert, error)
+}

certs/doc.go

@@ -0,0 +1,6 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package certs contains the domain concept definitions needed to support
+// Mainflux certs service functionality.
+package certs

certs/openapi.yml

@@ -0,0 +1,144 @@
+openapi: 3.0.1
+info:
+  title: Mainflux Certs service
+  description: HTTP API for Certs service
+  version: "1.0.0"
+
+paths:
+  /certs:
+    post:
+      summary: Creates a certificate for thing
+      description: Creates a certificate for thing
+      tags:
+        - Thing to proxy
+      parameters:
+      - $ref: "#/components/parameters/Authorization"
+      requestBody:
+        $ref: "#/components/requestBodies/CertReq"
+      responses:
+        201:
+          description: Created
+        400:
+          description: Failed due to malformed JSON.
+        500:
+          description: Unexpected server-side error ocurred.
+  /certs/{thingID}:
+    get:
+      summary: Retrieves certificates
+      description: |
+        Retrieves a certificates for given thing ID .
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ThingID"
+      responses:
+        200:
+          $ref: "#/components/responses/CertsRes"
+        404:
+          description: |
+            Failed to retrieve corresponding certificate.
+        500:
+          $ref: "#/components/responses/ServiceError"
+  /certs/revoke:
+    delete:
+      summary: Revokes certificate
+      description: |
+        Revokes a certificates for given thing ID .
+      tags:
+        - configs
+      parameters:
+        - $ref: "#/components/parameters/Authorization"
+        - $ref: "#/components/parameters/ThingID"
+      responses:
+        200:
+          $ref: "#/components/responses/RevokeRes"
+        404:
+          description: |
+            Failed to revoke corresponding certificate.
+        500:
+          $ref: "#/components/responses/ServiceError"
+
+components:
+  parameters:
+    Authorization:
+      name: Authorization
+      description: User's access token. Used instead of credentials in env or config.toml.
+      in: header
+      schema:
+        type: string
+      required: false
+    ThingID:
+      name: thingID
+      description: Thing ID
+      in: path
+      schema:
+        type: string
+      required: true
+
+  schemas:
+    Certs:
+      type: object
+      properties:
+        thing_id:
+          type: string
+          description: Corresponding Mainflux Thing ID.
+        client_cert:
+          type: string
+          description: Client Certificate.
+        client_key:
+          type: string
+          description: Key for the client_cert.
+        issuing_ca:
+          type: string
+          description: CA Certificate that is used to issue client certs, usually intermediate.
+        serial:
+          type: string
+          description: Certificate serial
+        expire:
+          type: string
+          description: Certificate expiry date
+    Revoke:
+      type: object
+      properties:
+        revocation_time:
+          type: string
+          description: Certificate revocation time
+
+  requestBodies:
+    CertReq:
+      description: |
+          Issues a certificate that is required for mTLS. To create a certificate for a thing
+          provide a thing id, data identifying particular thing will be embedded into the Certificate.
+          x509 and ECC certificates are supported when using when Vault is used as PKI.
+      content:
+        application/json:
+          schema:
+            type: object
+            required:
+              - thing_id
+              - days_valid
+              - rsa_bits
+            properties:
+               thing_id:
+                 type: string
+               days_valid:
+                 type: string
+               rsa_bits:
+                 type: integer
+
+  responses:
+    ServiceError:
+      description: Unexpected server-side error occurred.
+    CertsRes:
+      description: Data retrieved.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Certs"
+    RevokeRes:
+      description: Certificate revoked.
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Revoke"

certs/pki/pki.go

@@ -0,0 +1,28 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package pki wraps vault client
+package pki
+
+import "time"
+
+type Revoke struct {
+	RevocationTime time.Time `mapstructure:"revocation_time"`
+}
+
+type Cert struct {
+	ClientCert     string    `json:"client_cert" mapstructure:"certificate"`
+	IssuingCA      string    `json:"issuing_ca" mapstructure:"issuing_ca"`
+	CAChain        []string  `json:"ca_chain" mapstructure:"ca_chain"`
+	ClientKey      string    `json:"client_key" mapstructure:"private_key"`
+	PrivateKeyType string    `json:"private_key_type" mapstructure:"private_key_type"`
+	Serial         string    `json:"serial" mapstructure:"serial_number"`
+	Expire         time.Time `json:"expire" mapstructure:"-"`
+}
+
+type Agent interface {
+	// IssueCert issues certificate on PKI
+	IssueCert(cn string, ttl, keyType string, keyBits int) (Cert, error)
+	// Revoke revokes certificate from PKI
+	Revoke(serial string) (Revoke, error)
+}

certs/pki/vault.go

@@ -0,0 +1,161 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package pki wraps vault client
+package pki
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"github.com/hashicorp/vault/api"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/mitchellh/mapstructure"
+)
+
+const (
+	issue  = "issue"
+	revoke = "revoke"
+	apiVer = "v1"
+)
+
+var (
+	errFailedVaultCertIssue = errors.New("failed to issue vault certificate")
+	errFailedCertDecoding   = errors.New("failed to decode response from vault service")
+)
+
+type pkiAgent struct {
+	token     string
+	path      string
+	role      string
+	host      string
+	issueURL  string
+	revokeURL string
+	client    *api.Client
+}
+
+type certReq struct {
+	CommonName string `json:"common_name"`
+	TTL        string `json:"ttl"`
+	KeyBits    int    `json:"key_bits"`
+	KeyType    string `json:"key_type"`
+}
+
+type certRevokeReq struct {
+	SerialNumber string `json:"serial_number"`
+}
+
+func NewVaultClient(token, host, path, role string) (Agent, error) {
+	conf := &api.Config{
+		Address: host,
+	}
+
+	client, err := api.NewClient(conf)
+	if err != nil {
+		return nil, err
+	}
+	client.SetToken(token)
+	p := pkiAgent{
+		token:     token,
+		host:      host,
+		role:      role,
+		path:      path,
+		client:    client,
+		issueURL:  "/" + apiVer + "/" + path + "/" + issue + "/" + role,
+		revokeURL: "/" + apiVer + "/" + path + "/" + revoke,
+	}
+	return &p, nil
+}
+
+func (p *pkiAgent) IssueCert(cn string, ttl, keyType string, keyBits int) (Cert, error) {
+	cReq := certReq{
+		CommonName: cn,
+		TTL:        ttl,
+		KeyBits:    keyBits,
+		KeyType:    keyType,
+	}
+
+	r := p.client.NewRequest("POST", p.issueURL)
+	if err := r.SetJSONBody(cReq); err != nil {
+		return Cert{}, err
+	}
+
+	resp, err := p.client.RawRequest(r)
+	if resp != nil {
+		defer resp.Body.Close()
+	}
+
+	if err != nil {
+		return Cert{}, err
+	}
+
+	if resp.StatusCode >= http.StatusBadRequest {
+		_, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return Cert{}, err
+		}
+		return Cert{}, errors.Wrap(errFailedVaultCertIssue, err)
+	}
+
+	s, _ := api.ParseSecret(resp.Body)
+	cert := Cert{}
+
+	if err = mapstructure.Decode(s.Data, &cert); err != nil {
+		return Cert{}, errors.Wrap(errFailedCertDecoding, err)
+	}
+
+	// Expire time calc must be revised value doesnt look correct
+	exp, err := s.Data["expiration"].(json.Number).Float64()
+	if err != nil {
+		return cert, err
+	}
+	expTime := time.Unix(0, int64(exp)*int64(time.Millisecond))
+	cert.Expire = expTime
+	return cert, nil
+
+}
+
+func (p *pkiAgent) Revoke(serial string) (Revoke, error) {
+	cReq := certRevokeReq{
+		SerialNumber: serial,
+	}
+
+	r := p.client.NewRequest("POST", p.revokeURL)
+	if err := r.SetJSONBody(cReq); err != nil {
+		return Revoke{}, err
+	}
+
+	resp, err := p.client.RawRequest(r)
+	if resp != nil {
+		defer resp.Body.Close()
+	}
+
+	if err != nil {
+		return Revoke{}, err
+	}
+
+	if resp.StatusCode >= http.StatusBadRequest {
+		_, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return Revoke{}, err
+		}
+		return Revoke{}, errors.Wrap(errFailedVaultCertIssue, err)
+	}
+
+	s, err := api.ParseSecret(resp.Body)
+	if err != nil {
+		return Revoke{}, err
+	}
+
+	rev, err := s.Data["revocation_time"].(json.Number).Float64()
+	if err != nil {
+		return Revoke{}, err
+	}
+	revTime := time.Unix(0, int64(rev)*int64(time.Millisecond))
+	return Revoke{
+		RevocationTime: revTime,
+	}, nil
+
+}

certs/postgres/certs.go

@@ -0,0 +1,195 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"time"
+
+	"github.com/jmoiron/sqlx"
+	"github.com/lib/pq"
+	"github.com/mainflux/mainflux/certs"
+	"github.com/mainflux/mainflux/logger"
+	"github.com/mainflux/mainflux/pkg/errors"
+	"github.com/mainflux/mainflux/things"
+)
+
+const duplicateErr = "unique_violation"
+
+var (
+	errSaveDB     = errors.New("failed to save certificate to database")
+	errRetrieveDB = errors.New("failed to retrieve certificate from db")
+	errRemove     = errors.New("failed to remove certificate from database")
+	errInvalid    = "invalid_text_representation"
+)
+
+var _ certs.Repository = (*certsRepository)(nil)
+
+type Cert struct {
+	ThingID string
+	Serial  string
+	Expire  time.Time
+}
+
+type certsRepository struct {
+	db  *sqlx.DB
+	log logger.Logger
+}
+
+// NewRepository instantiates a PostgreSQL implementation of certs
+// repository.
+func NewRepository(db *sqlx.DB, log logger.Logger) certs.Repository {
+	return &certsRepository{db: db, log: log}
+}
+
+func (cr certsRepository) RetrieveAll(ctx context.Context, ownerID string, offset, limit uint64) (certs.Page, error) {
+	q := `SELECT thing_id, owner_id, serial, expire FROM certs WHERE owner_id = $1 ORDER BY expire LIMIT $2 OFFSET $3;`
+	rows, err := cr.db.Query(q, ownerID, limit, offset)
+	if err != nil {
+		cr.log.Error(fmt.Sprintf("Failed to retrieve configs due to %s", err))
+		return certs.Page{}, err
+	}
+	defer rows.Close()
+
+	certificates := []certs.Cert{}
+
+	for rows.Next() {
+		c := certs.Cert{}
+		if err := rows.Scan(&c.ThingID, &c.OwnerID, &c.Serial, &c.Expire); err != nil {
+			cr.log.Error(fmt.Sprintf("Failed to read retrieved config due to %s", err))
+			return certs.Page{}, err
+
+		}
+		certificates = append(certificates, c)
+	}
+
+	q = `SELECT COUNT(*) FROM certs WHERE owner_id = $1`
+	var total uint64
+	if err := cr.db.QueryRow(q, ownerID).Scan(&total); err != nil {
+		cr.log.Error(fmt.Sprintf("Failed to count certs due to %s", err))
+		return certs.Page{}, err
+	}
+
+	return certs.Page{
+		Total:  total,
+		Limit:  limit,
+		Offset: offset,
+		Certs:  certificates,
+	}, nil
+}
+
+func (cr certsRepository) Save(ctx context.Context, cert certs.Cert) (string, error) {
+	q := `INSERT INTO certs (thing_id, owner_id, serial, expire) VALUES (:thing_id, :owner_id, :serial, :expire)`
+
+	tx, err := cr.db.Beginx()
+	if err != nil {
+		return "", errors.Wrap(errSaveDB, err)
+	}
+
+	dbcrt := toDBCert(cert)
+
+	if _, err := tx.NamedExec(q, dbcrt); err != nil {
+		e := err
+		if pqErr, ok := err.(*pq.Error); ok && pqErr.Code.Name() == duplicateErr {
+			e = errors.New("error conflict")
+		}
+
+		cr.rollback("Failed to insert a Cert", tx, err)
+
+		return "", errors.Wrap(errSaveDB, e)
+	}
+
+	if err := tx.Commit(); err != nil {
+		cr.rollback("Failed to commit Config save", tx, err)
+	}
+
+	return cert.Serial, nil
+}
+
+func (cr certsRepository) Remove(ctx context.Context, serial string) error {
+	if _, err := cr.retrieveBySerial(ctx, serial); err != nil {
+		return errors.Wrap(errRemove, err)
+	}
+	q := `DELETE FROM certs WHERE serial = :serial`
+	var c certs.Cert
+	c.Serial = serial
+	dbcrt := toDBCert(c)
+	if _, err := cr.db.NamedExecContext(ctx, q, dbcrt); err != nil {
+		return errors.Wrap(errRemove, err)
+	}
+	return nil
+}
+
+func (cr certsRepository) RetrieveByThing(ctx context.Context, thingID string) (certs.Cert, error) {
+	q := `SELECT thing_id, owner_id, serial, expire FROM certs WHERE thing_id = $1`
+	var dbcrt dbCert
+	var c certs.Cert
+
+	if err := cr.db.QueryRowxContext(ctx, q, thingID).StructScan(&dbcrt); err != nil {
+
+		pqErr, ok := err.(*pq.Error)
+		if err == sql.ErrNoRows || ok && errInvalid == pqErr.Code.Name() {
+			return c, errors.Wrap(things.ErrNotFound, err)
+		}
+
+		return c, errors.Wrap(errRetrieveDB, err)
+	}
+	c = toCert(dbcrt)
+
+	return c, nil
+}
+
+func (cr certsRepository) retrieveBySerial(ctx context.Context, serial string) (certs.Cert, error) {
+	q := `SELECT thing_id, owner_id, serial, expire FROM certs WHERE serial = $1`
+	var dbcrt dbCert
+	var c certs.Cert
+
+	if err := cr.db.QueryRowxContext(ctx, q, serial).StructScan(&dbcrt); err != nil {
+
+		pqErr, ok := err.(*pq.Error)
+		if err == sql.ErrNoRows || ok && errInvalid == pqErr.Code.Name() {
+			return c, errors.Wrap(things.ErrNotFound, err)
+		}
+
+		return c, errors.Wrap(errRetrieveDB, err)
+	}
+	c = toCert(dbcrt)
+
+	return c, nil
+}
+
+func (cr certsRepository) rollback(content string, tx *sqlx.Tx, err error) {
+	cr.log.Error(fmt.Sprintf("%s %s", content, err))
+
+	if err := tx.Rollback(); err != nil {
+		cr.log.Error(fmt.Sprintf("Failed to rollback due to %s", err))
+	}
+}
+
+type dbCert struct {
+	ThingID string    `db:"thing_id"`
+	Serial  string    `db:"serial"`
+	Expire  time.Time `db:"expire"`
+	OwnerID string    `db:"owner_id"`
+}
+
+func toDBCert(c certs.Cert) dbCert {
+	return dbCert{
+		ThingID: c.ThingID,
+		OwnerID: c.OwnerID,
+		Serial:  c.Serial,
+		Expire:  c.Expire,
+	}
+}
+
+func toCert(cdb dbCert) certs.Cert {
+	var c certs.Cert
+	c.OwnerID = cdb.OwnerID
+	c.ThingID = cdb.ThingID
+	c.Serial = cdb.Serial
+	c.Expire = cdb.Expire
+	return c
+}

certs/postgres/doc.go

@@ -0,0 +1,6 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+// Package postgres contains repository implementations using PostgreSQL as
+// the underlying database.
+package postgres

certs/postgres/init.go

@@ -0,0 +1,79 @@
+// Copyright (c) 2019
+// Mainflux
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/jmoiron/sqlx"
+	migrate "github.com/rubenv/sql-migrate"
+)
+
+const primaryKey = "primary_key"
+
+// ErrMigrate indicates error during database migrations.
+var ErrMigrate = errors.New("error executing database migrations")
+
+// Config defines the options that are used when connecting to a PostgreSQL instance
+type Config struct {
+	Host        string
+	Port        string
+	User        string
+	Pass        string
+	Name        string
+	SSLMode     string
+	SSLCert     string
+	SSLKey      string
+	SSLRootCert string
+}
+
+// Connect creates a connection to the PostgreSQL instance and applies any
+// unapplied database migrations. A non-nil error is returned to indicate
+// failure.
+func Connect(cfg Config) (*sqlx.DB, error) {
+	url := fmt.Sprintf("host=%s port=%s user=%s dbname=%s password=%s sslmode=%s sslcert=%s sslkey=%s sslrootcert=%s", cfg.Host, cfg.Port, cfg.User, cfg.Name, cfg.Pass, cfg.SSLMode, cfg.SSLCert, cfg.SSLKey, cfg.SSLRootCert)
+
+	db, err := sqlx.Open("postgres", url)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := migrateDB(db); err != nil {
+		mErr, ok := err.(*migrate.TxError)
+		if ok && mErr.Migration.Id == primaryKey {
+			return db, ErrMigrate
+		}
+		return nil, err
+	}
+
+	return db, nil
+}
+
+func migrateDB(db *sqlx.DB) error {
+	migrations := &migrate.MemoryMigrationSource{
+		Migrations: []*migrate.Migration{
+			{
+				Id: "certs_1",
+				Up: []string{
+					`CREATE TABLE IF NOT EXISTS certs (
+						thing_id     TEXT NOT NULL,
+						owner_id     TEXT NOT NULL,
+						expire       TIMESTAMPTZ NOT NULL,
+						serial       TEXT NOT NULL,
+						PRIMARY KEY  (thing_id, owner_id)
+					);`,
+				},
+				Down: []string{
+					"DROP TABLE IF EXISTS certs;",
+				},
+			},
+		},
+	}
+
+	_, err := migrate.Exec(db.DB, "postgres", migrations, migrate.Up)
+	return err
+}

certs/postgres/setup_test.go

@@ -0,0 +1,77 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package postgres_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/jmoiron/sqlx"
+	"github.com/mainflux/mainflux/certs/postgres"
+	"github.com/mainflux/mainflux/logger"
+	dockertest "github.com/ory/dockertest/v3"
+)
+
+var (
+	testLog, _ = logger.New(os.Stdout, logger.Info.String())
+	db         *sqlx.DB
+)
+
+func TestMain(m *testing.M) {
+	pool, err := dockertest.NewPool("")
+	if err != nil {
+		testLog.Error(fmt.Sprintf("Could not connect to docker: %s", err))
+		return
+	}
+
+	cfg := []string{
+		"POSTGRES_USER=test",
+		"POSTGRES_PASSWORD=test",
+		"POSTGRES_DB=test",
+	}
+	container, err := pool.Run("postgres", "10.2-alpine", cfg)
+	if err != nil {
+		testLog.Error(fmt.Sprintf("Could not start container: %s", err))
+	}
+
+	port := container.GetPort("5432/tcp")
+
+	if err := pool.Retry(func() error {
+		url := fmt.Sprintf("host=localhost port=%s user=test dbname=test password=test sslmode=disable", port)
+		db, err = sqlx.Open("postgres", url)
+		if err != nil {
+			return err
+		}
+		return db.Ping()
+	}); err != nil {
+		testLog.Error(fmt.Sprintf("Could not connect to docker: %s", err))
+	}
+
+	dbConfig := postgres.Config{
+		Host:        "localhost",
+		Port:        port,
+		User:        "test",
+		Pass:        "test",
+		Name:        "test",
+		SSLMode:     "disable",
+		SSLCert:     "",
+		SSLKey:      "",
+		SSLRootCert: "",
+	}
+
+	if db, err = postgres.Connect(dbConfig); err != nil {
+		testLog.Error(fmt.Sprintf("Could not setup test DB connection: %s", err))
+	}
+
+	code := m.Run()
+
+	// Defers will not be run when using os.Exit
+	db.Close()
+	if err := pool.Purge(container); err != nil {
+		testLog.Error(fmt.Sprintf("Could not purge container: %s", err))
+	}
+
+	os.Exit(code)
+}

certs/service.go

@@ -0,0 +1,303 @@
+// Copyright (c) Mainflux
+// SPDX-License-Identifier: Apache-2.0
+
+package certs
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"crypto/ecdsa"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"math/big"
+	"time"
+
+	"github.com/mainflux/mainflux"
+	"github.com/mainflux/mainflux/certs/pki"
+	"github.com/mainflux/mainflux/pkg/errors"
+	mfsdk "github.com/mainflux/mainflux/pkg/sdk/go"
+)
+
+var (
+	// ErrNotFound indicates a non-existent entity request.
+	ErrNotFound = errors.New("non-existent entity")
+
+	// ErrMalformedEntity indicates malformed entity specification.
+	ErrMalformedEntity = errors.New("malformed entity specification")
+
+	// ErrUnauthorizedAccess indicates missing or invalid credentials provided
+	// when accessing a protected resource.
+	ErrUnauthorizedAccess = errors.New("missing or invalid credentials provided")
+
+	errFailedKeyCreation         = errors.New("failed to create client private key")
+	errFailedDateSetting         = errors.New("failed to set date for certificate")
+	errKeyBitsValueWrong         = errors.New("missing RSA bits for certificate creation")
+	errMissingCACertificate      = errors.New("missing CA certificate for certificate signing")
+	errFailedSerialGeneration    = errors.New("failed to generate certificate serial")
+	errFailedPemKeyWrite         = errors.New("failed to write PEM key")
+	errFailedPemDataWrite        = errors.New("failed to write pem data for certificate")
+	errPrivateKeyUnsupportedType = errors.New("private key type is unsupported")
+	errPrivateKeyEmpty           = errors.New("private key is empty")
+	errFailedToRemoveCertFromDB  = errors.New("failed to remove cert serial from db")
+	errFailedCertCreation        = errors.New("failed to create client certificate")
+	errFailedCertRevocation      = errors.New("failed to revoke certificate")
+)
+
+var _ Service = (*certsService)(nil)
+
+// Service specifies an API that must be fulfilled by the domain service
+// implementation, and all of its decorators (e.g. logging & metrics).
+type Service interface {
+	// IssueCert issues certificate for given thing id if access is granted with token
+	IssueCert(ctx context.Context, token, thingID, daysValid string, keyBits int, keyType string) (Cert, error)
+
+	// ListCerts lists all certificates issued for given owner
+	ListCerts(ctx context.Context, token string, offset, limit uint64) (Page, error)
+
+	// RevokeCert revokes certificate for given thing
+	RevokeCert(ctx context.Context, token, thingID string) (Revoke, error)
+}
+
+type Config struct {
+	LogLevel       string
+	ClientTLS      bool
+	CaCerts        string
+	HTTPPort       string
+	ServerCert     string
+	ServerKey      string
+	BaseURL        string
+	ThingsPrefix   string
+	JaegerURL      string
+	AuthnURL       string
+	AuthnTimeout   time.Duration
+	SignTLSCert    tls.Certificate
+	SignX509Cert   *x509.Certificate
+	SignRSABits    int
+	SignHoursValid string
+	PKIHost        string
+	PKIPath        string
+	PKIRole        string
+	PKIToken       string
+}
+
+type certsService struct {
+	auth      mainflux.AuthNServiceClient
+	certsRepo Repository
+	sdk       mfsdk.SDK
+	conf      Config
+	pki       pki.Agent
+}
+
+// New returns new Certs service.
+func New(auth mainflux.AuthNServiceClient, certs Repository, sdk mfsdk.SDK, config Config, pki pki.Agent) Service {
+	return &certsService{
+		certsRepo: certs,
+		sdk:       sdk,
+		auth:      auth,
+		conf:      config,
+		pki:       pki,
+	}
+}
+
+type Revoke struct {
+	RevocationTime time.Time `mapstructure:"revocation_time"`
+}
+
+type Cert struct {
+	OwnerID        string    `json:"owner_id" mapstructure:"owner_id"`
+	ThingID        string    `json:"thing_id" mapstructure:"thing_id"`
+	ClientCert     string    `json:"client_cert" mapstructure:"certificate"`
+	IssuingCA      string    `json:"issuing_ca" mapstructure:"issuing_ca"`
+	CAChain        []string  `json:"ca_chain" mapstructure:"ca_chain"`
+	ClientKey      string    `json:"client_key" mapstructure:"private_key"`
+	PrivateKeyType string    `json:"private_key_type" mapstructure:"private_key_type"`
+	Serial         string    `json:"serial" mapstructure:"serial_number"`
+	Expire         time.Time `json:"expire" mapstructure:"-"`
+}
+
+func (cs *certsService) IssueCert(ctx context.Context, token, thingID string, daysValid string, keyBits int, keyType string) (Cert, error) {
+	var c Cert
+	owner, err := cs.auth.Identify(ctx, &mainflux.Token{Value: token})
+	if err != nil {
+		return c, errors.Wrap(ErrUnauthorizedAccess, err)
+	}
+
+	thing, err := cs.sdk.Thing(thingID, token)
+	if err != nil {
+		return c, errors.Wrap(errFailedCertCreation, err)
+	}
+
+	// If PKIHost is not set we don't use 3rd party PKI service.
+	if cs.conf.PKIHost == "" {
+		c.ClientCert, c.ClientKey, err = cs.certs(thing.Key, daysValid, keyBits)
+		if err != nil {
+			return c, errors.Wrap(errFailedCertCreation, err)
+		}
+		return c, err
+	}
+
+	cert, err := cs.pki.IssueCert(thingID, daysValid, keyType, keyBits)
+	if err != nil {
+		return c, errors.Wrap(errFailedCertCreation, err)
+	}
+
+	c.ThingID = thingID
+	c.OwnerID = owner.GetValue()
+	c.ClientCert = cert.ClientCert
+	c.IssuingCA = cert.IssuingCA
+	c.CAChain = cert.CAChain
+	c.ClientKey = cert.ClientKey
+	c.PrivateKeyType = cert.PrivateKeyType
+	c.Serial = cert.Serial
+	c.Expire = cert.Expire
+
+	_, err = cs.certsRepo.Save(context.Background(), c)
+	return c, err
+}
+
+func (cs *certsService) RevokeCert(ctx context.Context, token, thingID string) (Revoke, error) {
+	var revoke Revoke
+	_, err := cs.auth.Identify(ctx, &mainflux.Token{Value: token})
+	if err != nil {
+		return revoke, errors.Wrap(ErrUnauthorizedAccess, err)
+	}
+	thing, err := cs.sdk.Thing(thingID, token)
+	if err != nil {
+		return revoke, errors.Wrap(errFailedCertRevocation, err)
+	}
+
+	cert, err := cs.certsRepo.RetrieveByThing(ctx, thing.ID)
+	if err != nil {
+		return revoke, errors.Wrap(errFailedCertRevocation, err)
+	}
+
+	r, err := cs.pki.Revoke(cert.Serial)
+	if err != nil {
+		return revoke, errors.Wrap(errFailedCertRevocation, err)
+	}
+	revoke.RevocationTime = r.RevocationTime
+	if err = cs.certsRepo.Remove(context.Background(), cert.Serial); err != nil {
+		return revoke, errors.Wrap(errFailedToRemoveCertFromDB, err)
+	}
+	return revoke, nil
+}
+
+func (cs *certsService) ListCerts(ctx context.Context, token string, offset, limit uint64) (Page, error) {
+	u, err := cs.auth.Identify(ctx, &mainflux.Token{Value: token})
+	if err != nil {
+		return Page{}, errors.Wrap(ErrUnauthorizedAccess, err)
+	}
+
+	return cs.certsRepo.RetrieveAll(ctx, u.GetValue(), offset, limit)
+}
+
+func (cs *certsService) certs(thingKey, daysValid string, keyBits int) (string, string, error) {
+	if cs.conf.SignX509Cert == nil {
+		return "", "", errors.Wrap(errFailedCertCreation, errMissingCACertificate)
+	}
+	if keyBits == 0 {
+		return "", "", errors.Wrap(errFailedCertCreation, errKeyBitsValueWrong)
+	}
+	var priv interface{}
+	priv, err := rsa.GenerateKey(rand.Reader, keyBits)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedKeyCreation, err)
+	}
+
+	if daysValid == "" {
+		daysValid = cs.conf.SignHoursValid
+	}
+
+	notBefore := time.Now()
+	validFor, err := time.ParseDuration(daysValid)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedDateSetting, err)
+	}
+	notAfter := notBefore.Add(validFor)
+
+	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
+	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedSerialGeneration, err)
+	}
+
+	tmpl := x509.Certificate{
+		SerialNumber: serialNumber,
+		Subject: pkix.Name{
+			Organization:       []string{"Mainflux"},
+			CommonName:         thingKey,
+			OrganizationalUnit: []string{"mainflux"},
+		},
+		NotBefore: notBefore,
+		NotAfter:  notAfter,
+
+		KeyUsage:     x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
+		SubjectKeyId: []byte{1, 2, 3, 4, 6},
+	}
+
+	pubKey, err := publicKey(priv)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedCertCreation, err)
+	}
+	derBytes, err := x509.CreateCertificate(rand.Reader, &tmpl, cs.conf.SignX509Cert, pubKey, cs.conf.SignTLSCert.PrivateKey)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedCertCreation, err)
+	}
+
+	var bw, keyOut bytes.Buffer
+	buffWriter := bufio.NewWriter(&bw)
+	buffKeyOut := bufio.NewWriter(&keyOut)
+
+	if err := pem.Encode(buffWriter, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
+		return "", "", errors.Wrap(errFailedPemDataWrite, err)
+	}
+	buffWriter.Flush()
+	cert := bw.String()
+
+	block, err := pemBlockForKey(priv)
+	if err != nil {
+		return "", "", errors.Wrap(errFailedPemKeyWrite, err)
+	}
+	if err := pem.Encode(buffKeyOut, block); err != nil {
+		return "", "", errors.Wrap(errFailedPemKeyWrite, err)
+	}
+	buffKeyOut.Flush()
+	key := keyOut.String()
+
+	return cert, key, nil
+}
+
+func publicKey(priv interface{}) (interface{}, error) {
+	if priv == nil {
+		return nil, errPrivateKeyEmpty
+	}
+	switch k := priv.(type) {
+	case *rsa.PrivateKey:
+		return &k.PublicKey, nil
+	case *ecdsa.PrivateKey:
+		return &k.PublicKey, nil
+	default:
+		return nil, errPrivateKeyUnsupportedType
+	}
+}
+
+func pemBlockForKey(priv interface{}) (*pem.Block, error) {
+	switch k := priv.(type) {
+	case *rsa.PrivateKey:
+		return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}, nil
+	case *ecdsa.PrivateKey:
+		b, err := x509.MarshalECPrivateKey(k)
+		if err != nil {
+			return nil, err
+		}
+		return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}, nil
+	default:
+		return nil, nil
+	}
+}