/// <summary>
/// calculate the base keys to initialize the other keys
/// </summary>
/// <param name="clientChallenge">the challenge generated by client</param>
/// <param name="time">the time generated by client</param>
/// <param name="serverName">the server name from the authenticate packet</param>
/// <param name="domainName">the domain name from the authenticate packet</param>
/// <param name="userName">the user name from the authenticate packet</param>
/// <param name="userPassword">the user password from the authenticate packet</param>
/// <param name="responseKeyLm">output the lm key</param>
/// <param name="expectedNtChallengeResponse">output the expected nt challenge response of server</param>
/// <param name="expectedLmChallengeResponse">output the expected lm challenge response of server</param>
/// <param name="sessionBaseKey">output the session base key of server</param>
/// <param name="keyExchangeKey">output the key exchange key of server</param>
private void CalculateBaseKeys(
ulong clientChallenge,
ulong time,
byte[] serverName,
string domainName,
string userName,
string userPassword,
out byte[] responseKeyLm,
out byte[] expectedNtChallengeResponse,
out byte[] expectedLmChallengeResponse,
out byte[] sessionBaseKey,
out byte[] keyExchangeKey)
{
// calculate the response key nt and lm
byte[] responseKeyNt = NlmpUtility.GetResponseKeyNt(this.version, domainName, userName, userPassword);
responseKeyLm = NlmpUtility.GetResponseKeyLm(this.version, domainName, userName, userPassword);
// calcute the expected key
expectedNtChallengeResponse = null;
expectedLmChallengeResponse = null;
sessionBaseKey = null;
NlmpUtility.ComputeResponse(this.version, this.nlmpServer.Context.NegFlg, responseKeyNt, responseKeyLm,
this.challenge.Payload.ServerChallenge, clientChallenge, time, serverName,
out expectedNtChallengeResponse, out expectedLmChallengeResponse, out sessionBaseKey);
// update session key
this.nlmpServer.Context.SessionBaseKey = new byte[sessionBaseKey.Length];
Array.Copy(sessionBaseKey, this.nlmpServer.Context.SessionBaseKey, sessionBaseKey.Length);
// key exchange key
keyExchangeKey = NlmpUtility.KXKey(
this.version, sessionBaseKey,
this.authenticate.Payload.LmChallengeResponse,
this.challenge.Payload.ServerChallenge,
this.nlmpServer.Context.NegFlg, responseKeyLm);
}
