NOISSUE - Add FetchKbsToken RPC support, update protobuf generation, and include additional binaries in CI workflow. (#610)

* feat: add FetchKbsToken RPC support, update protobuf generation, and include additional binaries in CI workflow.

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* chore: update protoc version and add GetKbsToken mock method with updated kbsHTTPGet signature

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* test: inject mock attestation client into agentService for resource and KBS tests

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

* test: update key derivation in tests to use Concat KDF instead of HKDF

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

---------

Signed-off-by: Sammy Oina <sammyoina@gmail.com>

pkg/clients/grpc/attestation/client.go

@@ -17,6 +17,7 @@ type Client interface {
 	GetAttestation(ctx context.Context, reportData [64]byte, nonce [32]byte, attType attestation.PlatformType) ([]byte, error)
 	GetRawEvidence(ctx context.Context, reportData [64]byte, nonce [32]byte, attType attestation.PlatformType) ([]byte, error)
 	GetAzureToken(ctx context.Context, nonce [32]byte) ([]byte, error)
+	GetKbsToken(ctx context.Context) ([]byte, error)
 	Close() error
 }
 
@@ -132,3 +133,15 @@ func (c *client) GetAzureToken(ctx context.Context, nonce [32]byte) ([]byte, err
 
 	return resp.Token, nil
 }
+
+func (c *client) GetKbsToken(ctx context.Context) ([]byte, error) {
+	ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
+	defer cancel()
+
+	resp, err := c.client.FetchKbsToken(ctx, &attestation_v1.KbsTokenRequest{})
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.Token, nil
+}