ts = ((AvTimestamp) AvPairs.get(avPairs, AvPair.MsvAvTimestamp)).getTimestamp();
            }

            setNTResponse(getNTLMv2Response(tc, type2, responseKeyNT, ntlmClientChallenge,
                    makeAvPairs(tc, targetName, avPairs, haveTimestamp, ts), ts));

            final MessageDigest hmac = Crypto.getHMACT64(responseKeyNT);
            hmac.update(this.ntResponse, 0, 16); // only first 16 bytes of ntResponse