/// <summary>
/// create a challenge packet. This packet contains CHALLENGE_MESSAGE. The CHALLENGE_MESSAGE defines an NTLM
/// challenge message that is sent from the server to the client. The CHALLENGE_MESSAGE is used by the server
/// to challenge the client to prove its identity.
/// </summary>
/// <param name="negotiateFlags">The client sets flags to indicate options it supports.</param>
/// <param name="version">
/// This structure is used for debugging purposes only. In normal (non-debugging) protocol messages, it is
/// ignored and does not affect the NTLM message processing.
/// </param>
/// <param name="serverChallenge">contains the NTLM challenge. The challenge is a 64-bit nonce.</param>
/// <param name="targetName">
/// TargetName contains the name of the server authentication realm, and MUST be expressed in the negotiated
/// character set. A server that is a member of a domain returns the domain of which it is a member, and a
/// server that is not a member of a domain returns the server name. This param can be null.
/// </param>
/// <param name="targetInfo">
/// TargetInfo contains a sequence of AV_PAIR structures.This param can be null.
/// </param>
/// <returns>the NlmpChallengePacket</returns>
/// <noException></noException>
public NlmpChallengePacket CreateChallengePacket(
NegotiateTypes negotiateFlags,
VERSION version,
ulong serverChallenge,
string targetName,
ICollection <AV_PAIR> targetInfo
)
{
NlmpChallengePacket packet = new NlmpChallengePacket();
packet.SetNegotiateFlags(negotiateFlags);
if (NlmpUtility.IsVersionRequired(negotiateFlags))
{
packet.SetVersion(version);
}
packet.SetServerChallenge(serverChallenge);
if (NlmpUtility.IsDomainType(negotiateFlags) || NlmpUtility.IsServerType(negotiateFlags))
{
packet.SetTargetName(targetName);
}
// generate bytes of targetinfo
byte[] targetInfoBytes = NlmpUtility.AvPairCollectionGetBytes(targetInfo);
// initialize targetinfofield
packet.SetTargetInfo(targetInfoBytes);
return(packet);
}
