}
            NtlmPasswordAuthentication ntlm;
            if ( msg.startsWith("NTLM ") ) {
                byte[] challenge = getTransportContext().getTransportPool().getChallenge(getTransportContext(), dc);
                ntlm = NtlmSsp.authenticate(getTransportContext(), request, response, challenge);
                if ( ntlm == null )
                    return;
            }

            if ( log.isTraceEnabled() ) {
                log.trace(msg2.toString());
                log.trace(Hexdump.toHexString(token));
            }

            this.serverChallenge = msg2.getChallenge();

            if ( this.requireKeyExchange ) {
                if ( this.transportContext.getConfig().isEnforceSpnegoIntegrity() && ( !msg2.getFlag(NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH)

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

                if(( ntlm = NtlmSsp.authenticate( req, resp, challenge )) == null ) {
                    return null;
                }

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

                if ( ( ntlm = NtlmSsp.authenticate(getTransportContext(), req, resp, challenge) ) == null ) {
                    return null;
                }

                    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 ) {
                    return;
                }
            } else { /* Basic */

                }

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