globalAuthNPlugin *idplugin.AuthNPlugin

	// CA root certificates, a nil value means system certs pool will be used
	globalRootCAs *x509.CertPool

	// IsSSL indicates if the server is configured with SSL.
	globalIsTLS bool

	globalTLSCerts *certs.Manager

	globalHTTPServer        *xhttp.Server
	globalTCPOptions        xhttp.TCPOptions
	globalHTTPServerErrorCh = make(chan error)

func (m MQTTArgs) Validate() error {
	if !m.Enable {
		return nil
	}
	u, err := xnet.ParseURL(m.Broker.String())
	if err != nil {
		return err
	}
	switch u.Scheme {
	case "ws", "wss", "tcp", "ssl", "tls", "tcps":
	default:
		return errors.New("unknown protocol in broker address")
	}
	if m.QueueDir != "" {
		if !filepath.IsAbs(m.QueueDir) {
			return errors.New("queueDir path should be absolute")
		}

}

func testAPIHeadObjectHandlerWithEncryption(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
	credentials auth.Credentials, t *testing.T,
) {
	// Set SSL to on to do encryption tests
	globalIsTLS = true
	defer func() { globalIsTLS = false }()

	var (
		oneMiB        int64 = 1024 * 1024
		key32Bytes          = generateBytesData(32 * humanize.Byte)