* @throws SmbException
     */
    public void getUserSessionKey ( CIFSContext tc, byte[] chlng, byte[] dest, int offset ) throws SmbException {
        try {
            MessageDigest md4 = Crypto.getMD4();
            byte[] ntHash = getNTHash();
            switch ( tc.getConfig().getLanManCompatibility() ) {
            case 0:
            case 1:
            case 2:
                md4.update(ntHash);

                System.arraycopy(type2.getChallenge(), 0, sessionNonce, 0, 8);
                System.arraycopy(clientChallenge, 0, sessionNonce, 8, 8);

                MessageDigest md4 = Crypto.getMD4();
                md4.update(passwordHash);
                byte[] userSessionKey = md4.digest();

                MessageDigest hmac = Crypto.getHMACT64(userSessionKey);
                hmac.update(sessionNonce);