reactos/ntoskrnl/se/luid.c

   1 /* $Id: luid.c,v 1.10 2004/08/15 16:39:11 chorns 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 <ntoskrnl.h>
  15 #include <internal/debug.h>
  16
  17 /* GLOBALS *******************************************************************/
  18
  19 static KSPIN_LOCK LuidLock;
  20 static LARGE_INTEGER LuidIncrement;
  21 static LARGE_INTEGER LuidValue;
  22
  23 #define SYSTEM_LUID   0x3E7;
  24
  25 /* FUNCTIONS *****************************************************************/
  26
  27 VOID INIT_FUNCTION
  28 SepInitLuid(VOID)
  29 {
  30   KeInitializeSpinLock(&LuidLock);
  31   LuidValue.QuadPart = SYSTEM_LUID;
  32   LuidIncrement.QuadPart = 1;
  33 }
  34
  35
  36 /*
  37  * @implemented
  38  */
  39 NTSTATUS STDCALL
  40 NtAllocateLocallyUniqueId(OUT LUID *LocallyUniqueId)
  41 {
  42   LARGE_INTEGER ReturnedLuid;
  43   KIRQL Irql;
  44
  45   KeAcquireSpinLock(&LuidLock,
  46                     &Irql);
  47   ReturnedLuid = LuidValue;
  48   LuidValue = RtlLargeIntegerAdd(LuidValue,
  49                                  LuidIncrement);
  50   KeReleaseSpinLock(&LuidLock,
  51                     Irql);
  52
  53   LocallyUniqueId->LowPart = ReturnedLuid.u.LowPart;
  54   LocallyUniqueId->HighPart = ReturnedLuid.u.HighPart;
  55
  56   return(STATUS_SUCCESS);
  57 }
  58
  59
  60 /*
  61  * @implemented
  62  */
  63 VOID STDCALL
  64 RtlCopyLuid(IN PLUID LuidDest,
  65             IN PLUID LuidSrc)
  66 {
  67   LuidDest->LowPart = LuidSrc->LowPart;
  68   LuidDest->HighPart = LuidSrc->HighPart;
  69 }
  70
  71
  72 /*
  73  * @implemented
  74  */
  75 BOOLEAN STDCALL
  76 RtlEqualLuid(IN PLUID Luid1,
  77              IN PLUID Luid2)
  78 {
  79   return (Luid1->LowPart == Luid2->LowPart &&
  80           Luid1->HighPart == Luid2->HighPart);
  81 }
  82
  83 /* EOF */