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SEC_WINNT_AUTH_IDENTITY_INFO union (sspi.h)

  • Article

Contains the identity information for authentication.

Syntax

typedef union _SEC_WINNT_AUTH_IDENTITY_INFO {
  SEC_WINNT_AUTH_IDENTITY_EXW AuthIdExw;
  SEC_WINNT_AUTH_IDENTITY_EXA AuthIdExa;
  SEC_WINNT_AUTH_IDENTITY_A   AuthId_a;
  SEC_WINNT_AUTH_IDENTITY_W   AuthId_w;
  SEC_WINNT_AUTH_IDENTITY_EX2 AuthIdEx2;
} SEC_WINNT_AUTH_IDENTITY_INFO, *PSEC_WINNT_AUTH_IDENTITY_INFO;

Members

AuthIdExw

The AuthIdExw authentication identity.

AuthIdExa

The AuthIdExa authentication identity.

AuthId_a

The AuthId_a authentication identity.

AuthId_w

The AuthId_w authentication identity.

AuthIdEx2

The AuthIdEx2 authentication identity.

Remarks

How to parse a SEC_WINNT_AUTH_IDENTITY_INFO structure:

  1. First, check the first DWORD of SEC_WINNT_AUTH_IDENTITY_INFO. If the first DWORD is 0x200, it is either an AuthIdExw or AuthIdExA. Otherwise, if the first DWORD is 0x201, the structure is an AuthIdEx2 structure. Otherwise, the structure is either an AuthId_a or an AuthId_w.

  2. Secondly, check the flags for SEC_WINNT_AUTH_IDENTITY_ANSI or SEC_WINNT_AUTH_IDENTITY_UNICODE. The presence of the former means the structure is an ANSI structure. Otherwise, the structure is the wide version. Note that AuthIdEx2 does not have an ANSI version, so this check does not apply to it.

Requirements

Requirement Value
Header sspi.h