tc.getConfig().getRandom().nextBytes(this.masterKey);

                    final byte[] exchangedKey = new byte[16];
                    final Cipher arcfour = Crypto.getArcfour(ntlm2SessionKey);
                    arcfour.update(this.masterKey, 0, 16, exchangedKey, 0);
                    setEncryptedSessionKey(exchangedKey);
                } else {
                    this.masterKey = ntlm2SessionKey;