Resolve "Make private key to be persisted just in PEM format"

Closes #4 (closed)

handler/generate_certificate.go

@@ -75,7 +75,9 @@ func (s *KeyStorageServerImpl) GenerateCertificate(ctx context.Context, in *api.
 func generateCertificate(publicKeyBytes []byte, caCertFilePath string, caPrivateKeyFilePath string,
 	certificateData *api.GenerateCertificateRequest_CertificateData) ([]byte, error) {
 
-	publicKey, err := x509.ParsePKIXPublicKey(publicKeyBytes)
+	publicKeyPemBlock, _ := pem.Decode(publicKeyBytes)
+
+	publicKey, err := x509.ParsePKIXPublicKey(publicKeyPemBlock.Bytes)
 	if err != nil {
 		return nil, err
 	}