The RtlLengthSid routine returns the length, in bytes, of a valid security identifier (SID).

ULONG
  RtlLengthSid(
    IN PSID  Sid
    ); 

Parameters

Sid

Pointer to the SID structure. Must point to a valid SID.

Return Value

If the SID structure is valid, RtlLengthSid returns the length, in bytes, of the SID structure.

If the SID structure is not valid, the return value is undefined. Before calling RtlLengthSid, pass the SID to RtlValidSid to verify that it is valid.

Comments

For more information about security and access control, see the documentation on these topics in the Microsoft Windows SDK.

Requirements

IRQL: < DISPATCH_LEVEL

Headers: Declared in Ntifs.h. Include Ntifs.h.

See Also

RtlEqualPrefixSid, RtlEqualSid, RtlInitializeSid, RtlLengthRequiredSid, RtlSubAuthoritySid, RtlValidSid, SID