Получение SID пользователя, под которым запущен процесс

Code:

unit Unit1;

{©Drkb v.3}

interface

uses

Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls;

type

TForm1 = class(TForm)

   Button1: TButton;

   procedure Button1Click(Sender: TObject);

end;

PTokenUser = ^TTokenUser;

TTokenUser = record

   User: array[0..0] of TSIDAndAttributes;

end;

procedure ConvertSidToStringSid(SID: PSID; var StringSid: LPSTR); stdcall;

   external advapi32 name 'ConvertSidToStringSidA';

var

Form1: TForm1;

implementation

{$R *.dfm}

function GetCurrentUserSID: String;

var

TokenHandle: THandle;

TokenInformationClass: TTokenInformationClass;

TokenInformation: PTokenUser;

ReturnLength: DWORD;

StringSid: LPSTR;

begin

Result := '';

if OpenProcessToken(GetCurrentProcess, TOKEN_QUERY, TokenHandle) then

try

   TokenInformationClass := TokenUser;

   GetTokenInformation(TokenHandle, TokenInformationClass, nil, 0, ReturnLength);

   if GetLastError = ERROR_INSUFFICIENT_BUFFER then

   begin

     TokenInformation := GetMemory(ReturnLength);

     if TokenInformation <> nil then

     try

       if GetTokenInformation(TokenHandle, TokenInformationClass,

         TokenInformation, ReturnLength, ReturnLength) then

       begin

         ConvertSidToStringSid(TokenInformation^.User[0].Sid, StringSid);

         Result := StringSid;

       end;

     finally

       FreeMemory(TokenInformation);

     end;

   end;

finally

   CloseHandle(TokenHandle);

end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

ShowMessage(GetCurrentUserSID);

end;

end.