try {
                            final SmbTransportImpl transport = tf.getTransportPool()
                                    .getSmbTransport(tf, dr.getServer(), 0, false,
                                            !tf.getCredentials().isAnonymous() && tf.getConfig().isSigningEnabled()
                                                    && tf.getConfig().isIpcSigningEnforced())

    public byte[] getChallenge(final CIFSContext tf, final Address dc) throws SmbException {
        return getChallenge(tf, dc, 0);
    }

    @Override
    public byte[] getChallenge(final CIFSContext tf, final Address dc, final int port) throws SmbException {
        try (SmbTransportInternal trans = tf.getTransportPool()

        final UniAddress dc = new UniAddress(addr);
        try (SmbTransportInternal trans = tf.getTransportPool()
                .getSmbTransport(tf, dc, 0, false, tf.hasDefaultCredentials() && tf.getConfig().isIpcSigningEnforced())
                .unwrap(SmbTransportInternal.class)) {
            if (!tf.hasDefaultCredentials()) {

            }
        } else {
            final Trans2FindFirst2 req = new Trans2FindFirst2(tf.getConfig(), "\\", "*", SmbConstants.ATTR_DIRECTORY,
                    tf.getConfig().getListCount(), tf.getConfig().getListSize());
            final Trans2FindFirst2Response resp = new Trans2FindFirst2Response(tf.getConfig());
            try {
                send(req, resp);
            } catch (final SmbException e) {

        return parser.getDocument();
    }

    private String getXmlString(final Node node) throws Exception {
        final TransformerFactory tf = TransformerFactory.newInstance();
        final javax.xml.transform.Transformer transformer = tf.newTransformer();
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.INDENT, "no");

            MediaType.parse("text/plain; CHARSET=utf-8"),
            MediaType.parse("text/plain; charset=\"utf-8\""),
            MediaType.parse("text/plain; charset=\"\\u\\tf-\\8\""),
            MediaType.parse("text/plain; charset=UTF-8"),
            MediaType.parse("text/plain ; charset=utf-8"),
            MediaType.parse("text/plain; charset =UTF-8"),