}
                    dc = chal.dc;
                    challenge = chal.challenge;
                } else {
                    dc = getTransportContext().getNameServiceClient().getByName(this.domainController, true);
                    challenge = getTransportContext().getTransportPool().getChallenge(getTransportContext(), dc);
                }

                        ssn.setAttribute("NtlmHttpChal", chal);
                    }
                    dc = chal.dc;
                    challenge = chal.challenge;
                } else {
                    dc = UniAddress.getByName(domainController, true);
                    challenge = SmbSession.getChallenge(dc);
                }

                ntlm = NtlmSsp.authenticate(req, resp, challenge);

     *
     * @param dc the domain controller address
     * @return the NTLM challenge bytes
     * @throws SmbException if an SMB error occurs
     * @throws UnknownHostException if the host cannot be resolved
     */
    public static byte[] getChallenge(final UniAddress dc) throws SmbException, UnknownHostException {
        return getChallenge(dc, 0);
    }

    /**

    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()

            try (SmbTransport dc = getDc(tf, authDomain)) {
                final CacheEntry<Map<String, CacheEntry<DfsReferralDataInternal>>> entry =
                        new CacheEntry<>(tf.getConfig().getDfsTtl() * 10L);
                DfsReferralData initial = null;
                @SuppressWarnings("resource")
                final SmbTransportInternal trans = dc != null ? dc.unwrap(SmbTransportInternal.class) : null;

                    dc = nameServiceClient.getByName(mb);
                } else {
                    dc = nameServiceClient.getByName(server, possibleWorkgroup);
                }

                req.getSession(); /* ensure session id is set for cluster env. */
                challenge = getTransportContext().getTransportPool().getChallenge(getTransportContext(), dc);

        Map<String, String> initParams = new HashMap<>();
        initParams.put("jcifs.smb.client.domain", "TEST_DOMAIN");
        initParams.put("jcifs.http.domainController", "dc.test.com");
        initParams.put("jcifs.http.enableBasic", "true");
        initParams.put("jcifs.http.insecureBasic", "true");
        initParams.put("jcifs.http.basicRealm", "TestRealm");

    //
    //        /* Procedure:
    //         * Lookup a DC in the target domain
    //         * Ask the DC for a referral for the domain (e.g. "\example.com")
    //         * Do NetrDfsEnumEx on the server returned in the referral to
    //         * get roots in target domain
    //         */
    //
    //        UniAddress dc = UniAddress.getByName(domainName);

                    dc = UniAddress.getByName(mb);
                } else {
                    dc = UniAddress.getByName(server, possibleWorkgroup);
                }

                req.getSession(); /* ensure session id is set for cluster env. */
                challenge = SmbSession.getChallenge(dc);
                if ((ntlm = NtlmSsp.authenticate(req, resp, challenge)) == null) {

        Map<String, String> initParams = new HashMap<>();
        initParams.put("jcifs.smb.client.domain", "TEST_DOMAIN");
        initParams.put("jcifs.http.domainController", "dc.test.domain");
        initParams.put("jcifs.http.enableBasic", "true");
        initParams.put("jcifs.http.insecureBasic", "true");
        initParams.put("jcifs.http.basicRealm", "TestRealm");