/// <summary>
/// initialize the negotiate flags
/// </summary>
/// <returns>the negotiate flags for authenticate</returns>
private NegotiateTypes InitializeNegotiateFlags(NegotiateTypes challengeFlags)
{
NegotiateTypes flags = this.Context.ClientConfigFlags;
flags |= NegotiateTypes.NTLMSSP_NEGOTIATE_TARGET_INFO;
// A==1: The choice of character set encoding MUST be Unicode.
// A==0 and B==1: The choice of character set encoding MUST be OEM.
// A==0 and B==0: The protocol MUST return SEC_E_INVALID_TOKEN.
if (NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE == (challengeFlags & NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE))
{
if (flags.HasFlag(NegotiateTypes.NTLM_NEGOTIATE_OEM))
{
flags ^= NegotiateTypes.NTLM_NEGOTIATE_OEM;
}
if (!flags.HasFlag(NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE))
{
flags |= NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE;
}
}
else if (NegotiateTypes.NTLM_NEGOTIATE_OEM == (challengeFlags & NegotiateTypes.NTLM_NEGOTIATE_OEM))
{
if (flags.HasFlag(NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE))
{
flags ^= NegotiateTypes.NTLMSSP_NEGOTIATE_UNICODE;
}
if (!flags.HasFlag(NegotiateTypes.NTLM_NEGOTIATE_OEM))
{
flags |= NegotiateTypes.NTLM_NEGOTIATE_OEM;
}
}
else
{
throw new Exception("The protocol MUST return SEC_E_INVALID_TOKEN");
}
return(flags);
}
