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8b75dce45a
This fixes the copyright file header at the top of the file, reflecting the Coding Style rules. No code changes!
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Security object type list support routines
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* COPYRIGHT: Copyright Timo Kreuzer <timo.kreuzer@reactos.org>
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*/
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/* INCLUDES *******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* PRIVATE FUNCTIONS ***********************************************************/
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/**
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* @brief
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* Captures a list of object types.
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*
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* @param[in] ObjectTypeList
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* An existing list of object types.
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*
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* @param[in] ObjectTypeListLength
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* The length size of the list.
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*
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* @param[in] PreviousMode
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* Processor access level mode.
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*
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* @param[out] CapturedObjectTypeList
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* The captured list of object types.
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*
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* @return
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* Returns STATUS_SUCCESS if the list of object types has been captured
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* successfully. STATUS_INVALID_PARAMETER is returned if the caller hasn't
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* supplied a buffer list of object types. STATUS_INSUFFICIENT_RESOURCES
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* is returned if pool memory allocation for the captured list has failed.
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*/
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NTSTATUS
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SeCaptureObjectTypeList(
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_In_reads_opt_(ObjectTypeListLength) POBJECT_TYPE_LIST ObjectTypeList,
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_In_ ULONG ObjectTypeListLength,
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_In_ KPROCESSOR_MODE PreviousMode,
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_Out_ POBJECT_TYPE_LIST *CapturedObjectTypeList)
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{
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SIZE_T Size;
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if (PreviousMode == KernelMode)
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{
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return STATUS_NOT_IMPLEMENTED;
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}
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if (ObjectTypeListLength == 0)
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{
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*CapturedObjectTypeList = NULL;
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return STATUS_SUCCESS;
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}
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if (ObjectTypeList == NULL)
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{
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return STATUS_INVALID_PARAMETER;
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}
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/* Calculate the list size and check for integer overflow */
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Size = ObjectTypeListLength * sizeof(OBJECT_TYPE_LIST);
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if (Size == 0)
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{
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return STATUS_INVALID_PARAMETER;
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}
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/* Allocate a new list */
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*CapturedObjectTypeList = ExAllocatePoolWithTag(PagedPool, Size, TAG_SEPA);
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if (*CapturedObjectTypeList == NULL)
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{
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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_SEH2_TRY
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{
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ProbeForRead(ObjectTypeList, Size, sizeof(ULONG));
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RtlCopyMemory(*CapturedObjectTypeList, ObjectTypeList, Size);
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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ExFreePoolWithTag(*CapturedObjectTypeList, TAG_SEPA);
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*CapturedObjectTypeList = NULL;
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_SEH2_YIELD(return _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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return STATUS_SUCCESS;
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}
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/**
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* @brief
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* Releases a buffer list of object types.
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*
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* @param[in] CapturedObjectTypeList
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* A list of object types to free.
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*
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* @param[in] PreviousMode
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* Processor access level mode.
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*
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* @return
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* Nothing.
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*/
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VOID
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SeReleaseObjectTypeList(
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_In_ _Post_invalid_ POBJECT_TYPE_LIST CapturedObjectTypeList,
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_In_ KPROCESSOR_MODE PreviousMode)
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{
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if ((PreviousMode != KernelMode) && (CapturedObjectTypeList != NULL))
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ExFreePoolWithTag(CapturedObjectTypeList, TAG_SEPA);
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}
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/* EOF */
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