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NTLM: CHALLENGE_MESSAGE: Do not include TargetName and TargetInfo if the appropriate flags are not set

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This commit is contained in:
Tal Aloni 2017-09-01 18:53:42 +03:00
parent 06a30bc92d
commit adcb576976
1 changed files with 10 additions and 1 deletions
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11
SMBLibrary/Authentication/NTLM/Structures/ChallengeMessage.cs
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@ -48,12 +48,21 @@ namespace SMBLibrary.Authentication.NTLM
public byte[] GetBytes() public byte[] GetBytes()
{ {
if ((NegotiateFlags & NegotiateFlags.TargetNameSupplied) == 0)
{
TargetName = String.Empty;
}
if ((NegotiateFlags & NegotiateFlags.TargetInfo) == 0)
{
TargetInfo = new byte[0];
}
int fixedLength = 48; int fixedLength = 48;
if ((NegotiateFlags & NegotiateFlags.Version) > 0) if ((NegotiateFlags & NegotiateFlags.Version) > 0)
{ {
fixedLength += 8; fixedLength += 8;
} }
int payloadLength = TargetName.Length * 2 + TargetInfo.Length; int payloadLength = TargetName.Length * 2 + TargetInfo.Length;
byte[] buffer = new byte[fixedLength + payloadLength]; byte[] buffer = new byte[fixedLength + payloadLength];
ByteWriter.WriteAnsiString(buffer, 0, AuthenticateMessage.ValidSignature, 8); ByteWriter.WriteAnsiString(buffer, 0, AuthenticateMessage.ValidSignature, 8);