reactos/ntoskrnl/se/luid.c

   1 /* $Id: luid.c,v 1.8 2003/07/11 01:23:16 royce 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 /*
  38  * @implemented
  39  */
  40 NTSTATUS STDCALL
  41 NtAllocateLocallyUniqueId(OUT LUID *LocallyUniqueId)
  42 {
  43   LARGE_INTEGER ReturnedLuid;
  44   KIRQL Irql;
  45
  46   KeAcquireSpinLock(&LuidLock,
  47                     &Irql);
  48   ReturnedLuid = LuidValue;
  49   LuidValue = RtlLargeIntegerAdd(LuidValue,
  50                                  LuidIncrement);
  51   KeReleaseSpinLock(&LuidLock,
  52                     Irql);
  53
  54   LocallyUniqueId->LowPart = ReturnedLuid.u.LowPart;
  55   LocallyUniqueId->HighPart = ReturnedLuid.u.HighPart;
  56
  57   return(STATUS_SUCCESS);
  58 }
  59
  60
  61 /*
  62  * @implemented
  63  */
  64 VOID STDCALL
  65 RtlCopyLuid(IN PLUID LuidDest,
  66             IN PLUID LuidSrc)
  67 {
  68   LuidDest->LowPart = LuidSrc->LowPart;
  69   LuidDest->HighPart = LuidSrc->HighPart;
  70 }
  71
  72
  73 /*
  74  * @implemented
  75  */
  76 BOOLEAN STDCALL
  77 RtlEqualLuid(IN PLUID Luid1,
  78              IN PLUID Luid2)
  79 {
  80   return (Luid1->LowPart == Luid2->LowPart &&
  81           Luid1->HighPart == Luid2->HighPart);
  82 }
  83
  84 /* EOF */