private static NtlmChallenge interrogate ( CIFSContext tf, Address addr ) throws SmbException {
        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() ) {

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


    @Override
    public byte[] getChallenge ( CIFSContext tf, Address dc, int port ) throws SmbException {
        try ( SmbTransportInternal trans = tf.getTransportPool()
                .getSmbTransport(tf, dc, port, false, !tf.getCredentials().isAnonymous() && tf.getConfig().isIpcSigningEnforced())

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

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

        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");