reactos/ntoskrnl/se/luid.c

   1 /* $Id: luid.c,v 1.7 2003/05/31 11:10:30 ekohl Exp $
   2  *
   3  * COPYRIGHT:         See COPYING in the top level directory
   4  * PROJECT:           ReactOS kernel
   5  * PURPOSE:           Security manager
   6  * FILE:              ntoskrnl/se/luid.c
   7  * PROGRAMER:         ?
   8  * REVISION HISTORY:
   9  *                 26/07/98: Added stubs for security functions
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15
  16 #include <internal/debug.h>
  17
  18 /* GLOBALS *******************************************************************/
  19
  20 static KSPIN_LOCK LuidLock;
  21 static LARGE_INTEGER LuidIncrement;
  22 static LARGE_INTEGER LuidValue;
  23
  24 #define SYSTEM_LUID   0x3E7;
  25
  26 /* FUNCTIONS *****************************************************************/
  27
  28 VOID
  29 SepInitLuid(VOID)
  30 {
  31   KeInitializeSpinLock(&LuidLock);
  32   LuidValue.QuadPart = SYSTEM_LUID;
  33   LuidIncrement.QuadPart = 1;
  34 }
  35
  36
  37 NTSTATUS STDCALL
  38 NtAllocateLocallyUniqueId(OUT LUID *LocallyUniqueId)
  39 {
  40   LARGE_INTEGER ReturnedLuid;
  41   KIRQL Irql;
  42
  43   KeAcquireSpinLock(&LuidLock,
  44                     &Irql);
  45   ReturnedLuid = LuidValue;
  46   LuidValue = RtlLargeIntegerAdd(LuidValue,
  47                                  LuidIncrement);
  48   KeReleaseSpinLock(&LuidLock,
  49                     Irql);
  50
  51   LocallyUniqueId->LowPart = ReturnedLuid.u.LowPart;
  52   LocallyUniqueId->HighPart = ReturnedLuid.u.HighPart;
  53
  54   return(STATUS_SUCCESS);
  55 }
  56
  57
  58 VOID STDCALL
  59 RtlCopyLuid(IN PLUID LuidDest,
  60             IN PLUID LuidSrc)
  61 {
  62   LuidDest->LowPart = LuidSrc->LowPart;
  63   LuidDest->HighPart = LuidSrc->HighPart;
  64 }
  65
  66
  67 BOOLEAN STDCALL
  68 RtlEqualLuid(IN PLUID Luid1,
  69              IN PLUID Luid2)
  70 {
  71   return (Luid1->LowPart == Luid2->LowPart &&
  72           Luid1->HighPart == Luid2->HighPart);
  73 }
  74
  75 /* EOF */