* @return A <code>byte[]</code> containing the challenge.
     */
    public byte[] getChallenge () {
        return this.challenge;
    }


    /**
     * Sets the challenge for this message.
     *
     * @param challenge
     *            The challenge from the domain controller/server.
     */
    public void setChallenge ( byte[] challenge ) {
        this.challenge = challenge;
    }


    /**

     *
     * @return A <code>byte[]</code> containing the challenge.
     */
    public byte[] getChallenge() {
        return challenge;
    }

    /**
     * Sets the challenge for this message.
     *
     * @param challenge The challenge from the domain controller/server.
     */
    public void setChallenge(byte[] challenge) {
        this.challenge = challenge;
    }

    /**

            cleanup();
        }
        return inUse;
    }


    @Override
    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()

                            type2.getChallenge(),
                            clientChallenge);

                setLMResponse(clientChallenge);
                setNTResponse(ntlm2Response);

                if ((getFlags() & NTLMSSP_NEGOTIATE_SIGN) == NTLMSSP_NEGOTIATE_SIGN) {
                    byte[] sessionNonce = new byte[16];
                    System.arraycopy(type2.getChallenge(), 0, sessionNonce, 0, 8);

                "Failed to negotiate with a suitable domain controller for " + DOMAIN );
    }

    public static byte[] getChallenge( UniAddress dc )
                throws SmbException, UnknownHostException {
        return getChallenge(dc, 0);
    }

    public static byte[] getChallenge( UniAddress dc, int port )
                throws SmbException, UnknownHostException {

                byte[] ntlm2Response = NtlmUtil.getNTLM2Response(passwordHash, type2.getChallenge(), clientChallenge);

                setLMResponse(clientChallenge);
                setNTResponse(ntlm2Response);

                byte[] sessionNonce = new byte[16];
                System.arraycopy(type2.getChallenge(), 0, sessionNonce, 0, 8);
                System.arraycopy(clientChallenge, 0, sessionNonce, 8, 8);

            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 */