public static byte[] GetLmPasswordHash(SecureString password)
{
var passwordBuf = GetLmPasswordBuffer(password);
var input = Encoding.ASCII.GetBytes("KGS!@#$%KGS!@#$%");
return(DesHash.ComputeHash(passwordBuf, input));
}
public static byte[] GetLmChallengeResponse(byte[] challenge, SecureString password)
{
var lmPasswordHash = GetLmPasswordHash(password);
var key = new byte[21];
Buffer.BlockCopy(lmPasswordHash, 0, key, 0, 16);
Buffer.BlockCopy(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, key, 16, 5);
var input = new byte[24];
for (var i = 0; i < 3; i++)
{
Buffer.BlockCopy(challenge, 0, input, i * 8, 8);
}
return(DesHash.ComputeHash(key, input));
}
public static byte[] GetNtResponse(byte[] authenticatorChallenge, byte[] peerChallenge, byte[] userBuf,
SecureString password)
{
var challengeHash = GetChallengeHash(authenticatorChallenge, peerChallenge, userBuf);
var input = new byte[24];
for (var i = 0; i < 3; i++)
{
Buffer.BlockCopy(challengeHash, 0, input, i * 8, 8);
}
var passwordHash = GetNtPasswordHash(password);
var key = new byte[21];
Buffer.BlockCopy(passwordHash, 0, key, 0, 16);
Buffer.BlockCopy(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, key, 16, 5);
return(DesHash.ComputeHash(key, input));
}
