RtlLengthRequiredSid

INT64 __fastcall RtlLengthRequiredSid(UINT64 SubAuthorityCount){
  if( (unsigned int)SubAuthorityCount > 0x3FFFFFF7 )
    return 0xFFFFFFFFi64;
  else
    return(unsigned int)(4 * SubAuthorityCount + 8);
}

Referenced by:

CmpInitializeTrustedInstallerSid
EtwpApplyPayloadFilterInternal
IopCreateUmdfDirectory
NtQueryQuotaInformationFile
PopCreateTimebrokerServiceSid
PopNetInitialize
RtlNormalizeSecurityDescriptor
SepCreateTokenEx
SepVariableInitialization
WdipAccessCheck