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