Signature Creation for GSS_GetMICEx()

Section 3.4.2 describes the algorithm used by GSS_GetMICEx() to create the signature. The per_msg_token contains the NTLMSSP_MESSAGE_SIGNATURE structure (section

The checksum is computed over the concatenated input buffers using only the input data buffers where sign==TRUE for NTLMv1 and all of the input data buffers including the buffers where sign==FALSE for NTLMv2.