public ChallengeMessage(byte[] cm)
{
if (cm.Length < 56)
{
throw new ArgumentOutOfRangeException();
}
if (!Signature.CompareArray(cm, 0, 8))//0-8
{
throw new Exception("ChallengeMessage Signature Error");
}
if (MessageType != BitConverter.ToUInt32(cm, 8))//8-4
{
throw new Exception("ChallengeMessage MessageType Error");
}
TargetNameField = new MetaDataPayloadString(cm, 12); //12-8
NegotiateFlag = (NegotiateFlags)BitConverter.ToUInt32(cm, 20); //20-4
Array.Copy(cm, 24, ServerChallenge, 0, 8); //24-8
if (!Reserved.CompareArray(cm, 32, 8)) //32-8
{
throw new Exception("ChallengeMessage Reserved Error");
}
TargetInfoField = new MetaDataVariableTargetInfos(cm, 40); //40-8
Version = new Versions(cm, 48); //48-8
}
public AuthenticateMessage(
MetaDataPayloadHex lmChallengeResponseField,
NtChallengeResponseFields ntChallengeResponseField,
MetaDataPayloadString domainNameField,
MetaDataPayloadString userNameField,
MetaDataPayloadString workstationField,
MetaDataPayloadString encryptedRandomSessionKeyField,
NegotiateFlags negotiateFlag,
Versions version
)
{
LmChallengeResponseField = lmChallengeResponseField;
NtChallengeResponseField = ntChallengeResponseField;
DomainNameField = domainNameField;
UserNameField = userNameField;
WorkstationField = workstationField;
EncryptedRandomSessionKeyField = encryptedRandomSessionKeyField;
NegotiateFlag = negotiateFlag;
Version = version;
}
static public AuthenticateMessage CreateAuthenticateMessage(ChallengeMessage challengeMessage, string strUserName, byte[] passwordNTHash)
{
uint payloadPointer = 88 - 16;
MetaDataPayloadHex lcrf = new MetaDataPayloadHex(payloadPointer, new byte[24]);
payloadPointer += lcrf.Len;
NtChallengeResponseFields ncrf = NtChallengeResponseFields.CreateNtChallengeResponseFields(challengeMessage, strUserName, passwordNTHash, ref payloadPointer);
MetaDataPayloadString domainNameField = new MetaDataPayloadString(payloadPointer, challengeMessage.TargetNameField.Buffer);
payloadPointer += domainNameField.Len;
var userNames = Encoding.Unicode.GetBytes(strUserName);
var len = (ushort)userNames.Length;
MetaDataPayloadString userNameField = new MetaDataPayloadString(payloadPointer, userNames);
payloadPointer += userNameField.Len;
MetaDataPayloadString workstationField = new MetaDataPayloadString(payloadPointer, challengeMessage.TargetNameField.Buffer);
payloadPointer += workstationField.Len;
byte[] t = new byte[16];
if (challengeMessage.NegotiateFlag.HasFlag(NegotiateFlags.NEGOTIATE_KEY_EXCH))
{
// EncryptedRandomSessionKey=MasterKey RC4-encrypts SecondaryMasterKey
throw new NotImplementedException();
}
MetaDataPayloadString EncryptedRandomSessionKeyField = new MetaDataPayloadString(payloadPointer, t);
payloadPointer += EncryptedRandomSessionKeyField.Len;
return(new AuthenticateMessage(lcrf, ncrf, domainNameField, userNameField, workstationField,
EncryptedRandomSessionKeyField,
challengeMessage.NegotiateFlag,
new Versions()
));
}
