问golang使用自定义openssl？

var certFile, _ = filepath.Abs("conf/pem/ser.pem")
	var keyFile, _ = filepath.Abs("conf/pem/ser.auto_key")
	var client_ca, _ = filepath.Abs("conf/pem/ca.pem")

	var opts []grpc.ServerOption
	certificate, err := tls.LoadX509KeyPair(
		certFile,
		keyFile,
	)

	certPool := x509.NewCertPool()
	bs, err := ioutil.ReadFile(client_ca)
	if err != nil {
		log.Fatalf("failed to read client ca cert: %s", err)
	}

	ok := certPool.AppendCertsFromPEM(bs)
	if !ok {
		log.Fatal("failed to append client certs")
	}

	tlsConfig := &tls.Config{
		ClientAuth:   tls.RequireAndVerifyClientCert,
		Certificates: []tls.Certificate{certificate},
		ClientCAs:    certPool,
	}

	serverOption := grpc.Creds(credentials.NewTLS(tlsConfig))
	opts = []grpc.ServerOption{serverOption}
	s := grpc.NewServer(opts...)