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RtlSubAuthoritySid function (ntifs.h)

  • Article

The RtlSubAuthoritySid routine returns a pointer to a specified subauthority of a security identifier (SID).

Syntax

NTSYSAPI PULONG RtlSubAuthoritySid(
  [in] PSID  Sid,
       ULONG SubAuthority
);

Parameters

[in] Sid

Pointer to the SID structure. The SID must have been initialized by calling RtlInitializeSid.

SubAuthority

Zero-based index indicating which subauthority is being specified. This value is not validated against the number of subauthorities in the SID.

Return value

If the call to RtlSubAuthoritySid succeeds, the return value is a pointer to the specified SID subauthority. The subauthority value is a relative identifier. (The relative identifier, or RID, is the portion of a SID that identifies a user or group in relation to the authority that issued the SID.)

Remarks

For more information about security and access control, see Windows security model for driver developers and the documentation on these topics in the Windows SDK.

Requirements

Requirement Value
Minimum supported client Windows 2000
Target Platform Universal
Header ntifs.h (include Ntifs.h)
Library NtosKrnl.lib
DLL NtosKrnl.exe (kernel mode); Ntdll.dll (user mode)
IRQL < DISPATCH_LEVEL

See also

RtlInitializeSid

SID