GetSidSubAuthority

The GetSidSubAuthority function returns the address of a specified subauthority in a SID structure. The subauthority value is a relative identifier (RID). A SID is a security identifier.

PDWORD GetSidSubAuthority(
  PSID pSid,            // address of security identifier to query
  DWORD nSubAuthority   // index of subauthority to retrieve
);
 

Parameters

pSid

Pointer to the SID structure from which the address of a subauthority is to be returned.

nSubAuthority

Specifies an index value identifying the subauthority array element whose address the function will return. The function performs no validation tests on this value. An application can call the GetSidSubAuthorityCount function to discover the range of acceptable values.

Return Values

If the function succeeds, the return value is the address of the specified SID subauthority. To get extended error information, call GetLastError.

If the function fails, the return value is undefined. The function fails if the specified SID structure is invalid or if the index value specified by the nSubAuthority parameter is out of bounds.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Unsupported.
  Windows CE: Unsupported.
  Header: Declared in winbase.h.
  Import Library: Use advapi32.lib.

See Also

Access Control Overview, Access Control Functions, GetLengthSid, GetSidIdentifierAuthority, GetSidLengthRequired, GetSidSubAuthorityCount, IsValidSid, SID