reactos/sdk/lib/cmlib/cmse.c

115 lines
3.2 KiB
C

/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: lib/cmlib/cmse.c
* PURPOSE: Configuration Manager Library - Security Subsystem Interface
* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
*/
/* INCLUDES ******************************************************************/
#include "cmlib.h"
#define NDEBUG
#include <debug.h>
/* FUNCTIONS *****************************************************************/
VOID
NTAPI
CmpRemoveSecurityCellList(IN PHHIVE Hive,
IN HCELL_INDEX SecurityCell)
{
PCM_KEY_SECURITY SecurityData, FlinkCell, BlinkCell;
PAGED_CODE();
// ASSERT( (((PCMHIVE)Hive)->HiveSecurityLockOwner == KeGetCurrentThread()) || (CmpTestRegistryLockExclusive() == TRUE) );
SecurityData = HvGetCell(Hive, SecurityCell);
if (!SecurityData) return;
FlinkCell = HvGetCell(Hive, SecurityData->Flink);
if (!FlinkCell)
{
HvReleaseCell(Hive, SecurityCell);
return;
}
BlinkCell = HvGetCell(Hive, SecurityData->Blink);
if (!BlinkCell)
{
HvReleaseCell(Hive, SecurityData->Flink);
HvReleaseCell(Hive, SecurityCell);
return;
}
/* Sanity checks */
ASSERT(FlinkCell->Blink == SecurityCell);
ASSERT(BlinkCell->Flink == SecurityCell);
/* Unlink the security block and free it */
FlinkCell->Blink = SecurityData->Blink;
BlinkCell->Flink = SecurityData->Flink;
#ifdef USE_CM_CACHE
CmpRemoveFromSecurityCache(Hive, SecurityCell);
#endif
/* Release the cells */
HvReleaseCell(Hive, SecurityData->Blink);
HvReleaseCell(Hive, SecurityData->Flink);
HvReleaseCell(Hive, SecurityCell);
}
VOID
NTAPI
CmpFreeSecurityDescriptor(IN PHHIVE Hive,
IN HCELL_INDEX Cell)
{
PCM_KEY_NODE CellData;
PCM_KEY_SECURITY SecurityData;
PAGED_CODE();
// ASSERT( (((PCMHIVE)Hive)->HiveSecurityLockOwner == KeGetCurrentThread()) || (CmpTestRegistryLockExclusive() == TRUE) );
CellData = HvGetCell(Hive, Cell);
if (!CellData) return;
ASSERT(CellData->Signature == CM_KEY_NODE_SIGNATURE);
// FIXME: ReactOS-specific: check whether this key has a security block.
// On Windows there is no such check, all keys seem to have a valid
// security block.
// If we remove this check on ReactOS (and continue running) then we get
// a BSOD at the end...
if (CellData->Security == HCELL_NIL)
{
DPRINT("Cell 0x%08x (data 0x%p) has no security block!\n", Cell, CellData);
HvReleaseCell(Hive, Cell);
return;
}
SecurityData = HvGetCell(Hive, CellData->Security);
if (!SecurityData)
{
HvReleaseCell(Hive, Cell);
return;
}
ASSERT(SecurityData->Signature == CM_KEY_SECURITY_SIGNATURE);
if (SecurityData->ReferenceCount > 1)
{
SecurityData->ReferenceCount--;
}
else // if (SecurityData->ReferenceCount <= 1)
{
CmpRemoveSecurityCellList(Hive, CellData->Security);
HvFreeCell(Hive, CellData->Security);
}
CellData->Security = HCELL_NIL;
HvReleaseCell(Hive, CellData->Security);
HvReleaseCell(Hive, Cell);
}