mirror of
https://github.com/reactos/reactos.git
synced 2024-06-26 07:51:52 +00:00
2c909db295
- Rename ObDirectoryType to ObpDirectoryObjectType and remove it from NDK (this is not exported!) - Rename ObSymbolicLinkType to ObpSymbolicLinkObjectType - Remove duplicated ObpTypeObjectType from ob.h
3523 lines
102 KiB
C
3523 lines
102 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: ntoskrnl/ob/obhandle.c
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* PURPOSE: Manages all functions related to the Object Manager handle
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* implementation, including creating and destroying handles
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* and/or handle tables, duplicating objects, and setting the
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* permanent or temporary flags.
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Eric Kohl
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* Thomas Weidenmueller (w3seek@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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PHANDLE_TABLE ObpKernelHandleTable = NULL;
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ULONG ObpAccessProtectCloseBit = MAXIMUM_ALLOWED;
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#define TAG_OB_HANDLE 'dHbO'
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/* PRIVATE FUNCTIONS *********************************************************/
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PHANDLE_TABLE
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NTAPI
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ObReferenceProcessHandleTable(IN PEPROCESS Process)
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{
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PHANDLE_TABLE HandleTable = NULL;
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/* Lock the process */
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if (ExAcquireRundownProtection(&Process->RundownProtect))
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{
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/* Get the handle table */
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HandleTable = Process->ObjectTable;
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if (!HandleTable)
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{
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/* No table, release the lock */
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ExReleaseRundownProtection(&Process->RundownProtect);
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}
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}
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/* Return the handle table */
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return HandleTable;
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}
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VOID
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NTAPI
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ObDereferenceProcessHandleTable(IN PEPROCESS Process)
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{
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/* Release the process lock */
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ExReleaseRundownProtection(&Process->RundownProtect);
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}
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ULONG
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NTAPI
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ObGetProcessHandleCount(IN PEPROCESS Process)
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{
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ULONG HandleCount;
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PHANDLE_TABLE HandleTable;
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ASSERT(Process);
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/* Ensure the handle table doesn't go away while we use it */
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HandleTable = ObReferenceProcessHandleTable(Process);
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if (HandleTable != NULL)
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{
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/* Count the number of handles the process has */
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HandleCount = HandleTable->HandleCount;
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/* Let the handle table go */
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ObDereferenceProcessHandleTable(Process);
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}
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else
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{
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/* No handle table, no handles */
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HandleCount = 0;
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}
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return HandleCount;
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}
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NTSTATUS
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NTAPI
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ObpReferenceProcessObjectByHandle(IN HANDLE Handle,
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IN PEPROCESS Process,
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IN PHANDLE_TABLE HandleTable,
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IN KPROCESSOR_MODE AccessMode,
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OUT PVOID *Object,
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OUT POBJECT_HANDLE_INFORMATION HandleInformation,
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OUT PACCESS_MASK AuditMask)
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{
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PHANDLE_TABLE_ENTRY HandleEntry;
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POBJECT_HEADER ObjectHeader;
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ACCESS_MASK GrantedAccess;
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ULONG Attributes;
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PETHREAD Thread = PsGetCurrentThread();
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NTSTATUS Status;
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/* Assume failure */
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*Object = NULL;
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/* Check if this is a special handle */
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if (HandleToLong(Handle) < 0)
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{
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/* Check if the caller wants the current process */
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if (Handle == NtCurrentProcess())
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{
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/* Return handle info */
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HandleInformation->HandleAttributes = 0;
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HandleInformation->GrantedAccess = Process->GrantedAccess;
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/* No audit mask */
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*AuditMask = 0;
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/* Reference ourselves */
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(Process);
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InterlockedIncrementSizeT(&ObjectHeader->PointerCount);
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/* Return the pointer */
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*Object = Process;
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ASSERT(*Object != NULL);
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return STATUS_SUCCESS;
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}
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/* Check if the caller wants the current thread */
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if (Handle == NtCurrentThread())
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{
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/* Return handle information */
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HandleInformation->HandleAttributes = 0;
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HandleInformation->GrantedAccess = Thread->GrantedAccess;
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/* Reference ourselves */
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(Thread);
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InterlockedIncrementSizeT(&ObjectHeader->PointerCount);
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/* No audit mask */
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*AuditMask = 0;
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/* Return the pointer */
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*Object = Thread;
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ASSERT(*Object != NULL);
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return STATUS_SUCCESS;
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}
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/* This is a kernel handle... do we have access? */
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if (AccessMode == KernelMode)
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{
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/* Use the kernel handle table and get the actual handle value */
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Handle = ObKernelHandleToHandle(Handle);
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HandleTable = ObpKernelHandleTable;
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}
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else
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{
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/* This is an illegal attempt to access a kernel handle */
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return STATUS_INVALID_HANDLE;
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}
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}
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/* Enter a critical region while we touch the handle table */
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ASSERT(HandleTable != NULL);
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KeEnterCriticalRegion();
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/* Get the handle entry */
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HandleEntry = ExMapHandleToPointer(HandleTable, Handle);
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if (HandleEntry)
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{
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/* Get the object header and validate the type*/
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ObjectHeader = ObpGetHandleObject(HandleEntry);
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/* Get the granted access and validate it */
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GrantedAccess = HandleEntry->GrantedAccess;
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/* Mask out the internal attributes */
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Attributes = HandleEntry->ObAttributes & OBJ_HANDLE_ATTRIBUTES;
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/* Fill out the information */
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HandleInformation->HandleAttributes = Attributes;
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HandleInformation->GrantedAccess = GrantedAccess;
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/* No audit mask (FIXME!) */
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*AuditMask = 0;
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/* Return the pointer */
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*Object = &ObjectHeader->Body;
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/* Add a reference */
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InterlockedIncrementSizeT(&ObjectHeader->PointerCount);
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/* Unlock the handle */
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ExUnlockHandleTableEntry(HandleTable, HandleEntry);
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KeLeaveCriticalRegion();
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/* Return success */
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ASSERT(*Object != NULL);
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return STATUS_SUCCESS;
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}
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else
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{
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/* Invalid handle */
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Status = STATUS_INVALID_HANDLE;
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}
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/* Return failure status */
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KeLeaveCriticalRegion();
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return Status;
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}
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BOOLEAN
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NTAPI
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ObpEnumFindHandleProcedure(IN PHANDLE_TABLE_ENTRY HandleEntry,
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IN HANDLE Handle,
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IN PVOID Context)
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{
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POBJECT_HEADER ObjectHeader;
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ACCESS_MASK GrantedAccess;
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ULONG HandleAttributes;
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POBP_FIND_HANDLE_DATA FindData = Context;
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/* Get the object header */
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ObjectHeader = ObpGetHandleObject(HandleEntry);
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/* Make sure it's valid and matching */
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if ((FindData->ObjectHeader) && (FindData->ObjectHeader != ObjectHeader))
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{
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/* No match, fail */
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return FALSE;
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}
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/* Now attempt to match the object type */
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if ((FindData->ObjectType) && (FindData->ObjectType != ObjectHeader->Type))
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{
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/* No match, fail */
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return FALSE;
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}
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/* Check if we have extra information */
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if (FindData->HandleInformation)
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{
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/* Get the granted access and attributes */
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GrantedAccess = HandleEntry->GrantedAccess;
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HandleAttributes = HandleEntry->ObAttributes & OBJ_HANDLE_ATTRIBUTES;
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/* Attempt to match them */
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if ((FindData->HandleInformation->HandleAttributes != HandleAttributes) ||
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(FindData->HandleInformation->GrantedAccess != GrantedAccess))
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{
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/* No match, fail */
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return FALSE;
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}
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}
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/* We have a match */
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return TRUE;
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}
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POBJECT_HANDLE_COUNT_ENTRY
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NTAPI
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ObpInsertHandleCount(IN POBJECT_HEADER ObjectHeader)
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{
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POBJECT_HEADER_HANDLE_INFO HandleInfo;
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POBJECT_HANDLE_COUNT_ENTRY FreeEntry;
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POBJECT_HANDLE_COUNT_DATABASE HandleDatabase, OldHandleDatabase;
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ULONG i;
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ULONG Size, OldSize;
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OBJECT_HANDLE_COUNT_DATABASE SingleDatabase;
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PAGED_CODE();
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/* Get the handle info */
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HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);
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if (!HandleInfo) return NULL;
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/* Check if we only have one entry */
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if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
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{
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/* Fill out the single entry */
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SingleDatabase.CountEntries = 1;
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SingleDatabase.HandleCountEntries[0] = HandleInfo->SingleEntry;
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/* Use this as the old size */
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OldHandleDatabase = &SingleDatabase;
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OldSize = sizeof(SingleDatabase);
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/* Now we'll have two entries, and an entire DB */
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i = 2;
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Size = sizeof(OBJECT_HANDLE_COUNT_DATABASE) +
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((i - 1) * sizeof(OBJECT_HANDLE_COUNT_ENTRY));
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}
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else
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{
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/* We already have a DB, get the information from it */
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OldHandleDatabase = HandleInfo->HandleCountDatabase;
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i = OldHandleDatabase->CountEntries;
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OldSize = sizeof(OBJECT_HANDLE_COUNT_DATABASE) +
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((i - 1) * sizeof(OBJECT_HANDLE_COUNT_ENTRY));
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/* Add 4 more entries */
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i += 4;
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Size = OldSize + (4 * sizeof(OBJECT_HANDLE_COUNT_ENTRY));
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}
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/* Allocate the DB */
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HandleDatabase = ExAllocatePoolWithTag(PagedPool, Size, TAG_OB_HANDLE);
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if (!HandleDatabase) return NULL;
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/* Copy the old database */
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RtlCopyMemory(HandleDatabase, OldHandleDatabase, OldSize);
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/* Check if we he had a single entry before */
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if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
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{
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/* Now we have more */
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ObjectHeader->Flags &= ~OB_FLAG_SINGLE_PROCESS;
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}
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else
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{
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/* Otherwise we had a DB, free it */
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ExFreePoolWithTag(OldHandleDatabase, TAG_OB_HANDLE);
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}
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/* Find the end of the copy and zero out the new data */
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FreeEntry = (PVOID)((ULONG_PTR)HandleDatabase + OldSize);
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RtlZeroMemory(FreeEntry, Size - OldSize);
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/* Set the new information and return the free entry */
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HandleDatabase->CountEntries = i;
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HandleInfo->HandleCountDatabase = HandleDatabase;
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return FreeEntry;
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}
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NTSTATUS
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NTAPI
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ObpIncrementHandleDataBase(IN POBJECT_HEADER ObjectHeader,
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IN PEPROCESS Process,
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IN OUT PULONG NewProcessHandleCount)
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{
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POBJECT_HEADER_HANDLE_INFO HandleInfo;
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POBJECT_HANDLE_COUNT_ENTRY HandleEntry, FreeEntry = NULL;
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POBJECT_HANDLE_COUNT_DATABASE HandleDatabase;
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ULONG i;
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PAGED_CODE();
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/* Get the handle info and check if we only have one entry */
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HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);
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if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
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{
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/* Check if the entry is free */
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if (!HandleInfo->SingleEntry.HandleCount)
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{
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/* Add ours */
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HandleInfo->SingleEntry.HandleCount = 1;
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HandleInfo->SingleEntry.Process = Process;
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/* Return success and 1 handle */
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*NewProcessHandleCount = 1;
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return STATUS_SUCCESS;
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}
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else if (HandleInfo->SingleEntry.Process == Process)
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{
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/* Busy entry, but same process */
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*NewProcessHandleCount = ++HandleInfo->SingleEntry.HandleCount;
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return STATUS_SUCCESS;
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}
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else
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{
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/* Insert a new entry */
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FreeEntry = ObpInsertHandleCount(ObjectHeader);
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if (!FreeEntry) return STATUS_INSUFFICIENT_RESOURCES;
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ASSERT(!FreeEntry->Process);
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ASSERT(!FreeEntry->HandleCount);
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/* Fill it out */
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FreeEntry->Process = Process;
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FreeEntry->HandleCount = 1;
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/* Return success and 1 handle */
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*NewProcessHandleCount = 1;
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return STATUS_SUCCESS;
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}
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}
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/* We have a database instead */
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HandleDatabase = HandleInfo->HandleCountDatabase;
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if (HandleDatabase)
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{
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/* Get the entries and loop them */
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i = HandleDatabase->CountEntries;
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HandleEntry = &HandleDatabase->HandleCountEntries[0];
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while (i)
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{
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/* Check if this is a match */
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if (HandleEntry->Process == Process)
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{
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/* Found it, get the process handle count */
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*NewProcessHandleCount = ++HandleEntry->HandleCount;
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return STATUS_SUCCESS;
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}
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else if (!HandleEntry->HandleCount)
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{
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/* Found a free entry */
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FreeEntry = HandleEntry;
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}
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/* Keep looping */
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HandleEntry++;
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i--;
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}
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/* Check if we couldn't find a free entry */
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if (!FreeEntry)
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{
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/* Allocate one */
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FreeEntry = ObpInsertHandleCount(ObjectHeader);
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if (!FreeEntry) return STATUS_INSUFFICIENT_RESOURCES;
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ASSERT(!FreeEntry->Process);
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ASSERT(!FreeEntry->HandleCount);
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}
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/* Fill out the entry */
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FreeEntry->Process = Process;
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FreeEntry->HandleCount = 1;
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*NewProcessHandleCount = 1;
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}
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/* Return success if we got here */
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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ObpChargeQuotaForObject(IN POBJECT_HEADER ObjectHeader,
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IN POBJECT_TYPE ObjectType,
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OUT PBOOLEAN NewObject)
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{
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POBJECT_HEADER_QUOTA_INFO ObjectQuota;
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ULONG PagedPoolCharge, NonPagedPoolCharge;
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/* Get quota information */
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ObjectQuota = OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader);
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*NewObject = FALSE;
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/* Check if this is a new object */
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if (ObjectHeader->Flags & OB_FLAG_CREATE_INFO)
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{
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/* Remove the flag */
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ObjectHeader->Flags &= ~ OB_FLAG_CREATE_INFO;
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if (ObjectQuota)
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{
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/* We have a quota, get the charges */
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PagedPoolCharge = ObjectQuota->PagedPoolCharge;
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NonPagedPoolCharge = ObjectQuota->NonPagedPoolCharge;
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}
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else
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{
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/* Get it from the object type */
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PagedPoolCharge = ObjectType->TypeInfo.DefaultPagedPoolCharge;
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NonPagedPoolCharge = ObjectType->TypeInfo.DefaultNonPagedPoolCharge;
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}
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/* Charge the quota */
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ObjectHeader->QuotaBlockCharged = (PVOID)1;
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DPRINT("FIXME: Should charge: %lx %lx\n", PagedPoolCharge, NonPagedPoolCharge);
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#if 0
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PsChargeSharedPoolQuota(PsGetCurrentProcess(),
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PagedPoolCharge,
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NonPagedPoolCharge);
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#endif
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/* Check if we don't have a quota block */
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if (!ObjectHeader->QuotaBlockCharged) return STATUS_QUOTA_EXCEEDED;
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/* Now set the flag */
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*NewObject = TRUE;
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}
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/* Return success */
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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ObpValidateAccessMask(IN PACCESS_STATE AccessState)
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{
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PISECURITY_DESCRIPTOR SecurityDescriptor;
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/* We're only interested if the object for this access state has an SD */
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SecurityDescriptor = AccessState->SecurityDescriptor;
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if (SecurityDescriptor)
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{
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/* Check if the SD has a system ACL but hasn't been granted access to get/set it */
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if ((SecurityDescriptor->Control & SE_SACL_PRESENT) &&
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!(AccessState->PreviouslyGrantedAccess & ACCESS_SYSTEM_SECURITY))
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{
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/* We're gonna need access */
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AccessState->RemainingDesiredAccess |= ACCESS_SYSTEM_SECURITY;
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}
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}
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/* This can't fail */
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return STATUS_SUCCESS;
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}
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/*++
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* @name ObpDecrementHandleCount
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*
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* The ObpDecrementHandleCount routine <FILLMEIN>
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*
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* @param ObjectBody
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* <FILLMEIN>.
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*
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* @param Process
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* <FILLMEIN>.
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*
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* @param GrantedAccess
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* <FILLMEIN>.
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*
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* @return None.
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*
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* @remarks None.
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*
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*--*/
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VOID
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NTAPI
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ObpDecrementHandleCount(IN PVOID ObjectBody,
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IN PEPROCESS Process,
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IN ACCESS_MASK GrantedAccess,
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IN POBJECT_TYPE ObjectType)
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{
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POBJECT_HEADER ObjectHeader;
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LONG SystemHandleCount, ProcessHandleCount;
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LONG NewCount;
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KIRQL CalloutIrql;
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POBJECT_HEADER_HANDLE_INFO HandleInfo;
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POBJECT_HANDLE_COUNT_ENTRY HandleEntry;
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POBJECT_HANDLE_COUNT_DATABASE HandleDatabase;
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ULONG i;
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PAGED_CODE();
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/* Get the object type and header */
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
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OBTRACE(OB_HANDLE_DEBUG,
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"%s - Decrementing count for: %p. HC PC %lx %lx\n",
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__FUNCTION__,
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ObjectBody,
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ObjectHeader->HandleCount,
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ObjectHeader->PointerCount);
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/* Lock the object */
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ObpAcquireObjectLock(ObjectHeader);
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/* Set default counts */
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SystemHandleCount = ObjectHeader->HandleCount;
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ProcessHandleCount = 0;
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/* Decrement the handle count */
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NewCount = InterlockedDecrementSizeT(&ObjectHeader->HandleCount);
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/* Check if we're out of handles and this was an exclusive object */
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if (!(NewCount) && (ObjectHeader->Flags & OB_FLAG_EXCLUSIVE))
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{
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/* Clear the exclusive flag */
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OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader)->ExclusiveProcess = NULL;
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}
|
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|
|
/* Is the object type keeping track of handles? */
|
|
if (ObjectType->TypeInfo.MaintainHandleCount)
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|
{
|
|
/* Get handle information */
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|
HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);
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|
|
/* Check if there's only a single entry */
|
|
if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
|
|
{
|
|
/* It should be us */
|
|
ASSERT(HandleInfo->SingleEntry.Process == Process);
|
|
ASSERT(HandleInfo->SingleEntry.HandleCount > 0);
|
|
|
|
/* Get the handle counts */
|
|
ProcessHandleCount = HandleInfo->SingleEntry.HandleCount--;
|
|
HandleEntry = &HandleInfo->SingleEntry;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, get the database */
|
|
HandleDatabase = HandleInfo->HandleCountDatabase;
|
|
if (HandleDatabase)
|
|
{
|
|
/* Get the entries and loop them */
|
|
i = HandleDatabase->CountEntries;
|
|
HandleEntry = &HandleDatabase->HandleCountEntries[0];
|
|
while (i)
|
|
{
|
|
/* Check if this is a match */
|
|
if ((HandleEntry->HandleCount) &&
|
|
(HandleEntry->Process == Process))
|
|
{
|
|
/* Found it, get the process handle count */
|
|
ProcessHandleCount = HandleEntry->HandleCount--;
|
|
break;
|
|
}
|
|
|
|
/* Keep looping */
|
|
HandleEntry++;
|
|
i--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No database, so no entry */
|
|
HandleEntry = NULL;
|
|
}
|
|
}
|
|
|
|
/* Check if this is the last handle */
|
|
if (ProcessHandleCount == 1)
|
|
{
|
|
/* Then clear the entry */
|
|
HandleEntry->Process = NULL;
|
|
HandleEntry->HandleCount = 0;
|
|
}
|
|
}
|
|
|
|
/* Release the lock */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
|
|
/* Check if we have a close procedure */
|
|
if (ObjectType->TypeInfo.CloseProcedure)
|
|
{
|
|
/* Call it */
|
|
ObpCalloutStart(&CalloutIrql);
|
|
ObjectType->TypeInfo.CloseProcedure(Process,
|
|
ObjectBody,
|
|
GrantedAccess,
|
|
ProcessHandleCount,
|
|
SystemHandleCount);
|
|
ObpCalloutEnd(CalloutIrql, "Close", ObjectType, ObjectBody);
|
|
}
|
|
|
|
/* Check if we should delete the object */
|
|
ObpDeleteNameCheck(ObjectBody);
|
|
|
|
/* Decrease the total number of handles for this type */
|
|
InterlockedDecrement((PLONG)&ObjectType->TotalNumberOfHandles);
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Decremented count for: %p. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
ObjectBody,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
}
|
|
|
|
/*++
|
|
* @name ObpCloseHandleTableEntry
|
|
*
|
|
* The ObpCloseHandleTableEntry routine <FILLMEIN>
|
|
*
|
|
* @param HandleTable
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleEntry
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param IgnoreHandleProtection
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpCloseHandleTableEntry(IN PHANDLE_TABLE HandleTable,
|
|
IN PHANDLE_TABLE_ENTRY HandleEntry,
|
|
IN HANDLE Handle,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
IN BOOLEAN IgnoreHandleProtection)
|
|
{
|
|
PVOID Body;
|
|
POBJECT_TYPE ObjectType;
|
|
POBJECT_HEADER ObjectHeader;
|
|
ACCESS_MASK GrantedAccess;
|
|
KIRQL CalloutIrql;
|
|
PAGED_CODE();
|
|
|
|
/* Get the object data */
|
|
ObjectHeader = ObpGetHandleObject(HandleEntry);
|
|
ObjectType = ObjectHeader->Type;
|
|
Body = &ObjectHeader->Body;
|
|
GrantedAccess = HandleEntry->GrantedAccess;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Closing handle: %p for %p. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Handle,
|
|
Body,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
|
|
/* Check if the object has an Okay To Close procedure */
|
|
if (ObjectType->TypeInfo.OkayToCloseProcedure)
|
|
{
|
|
/* Call it and check if it's not letting us close it */
|
|
ObpCalloutStart(&CalloutIrql);
|
|
if (!ObjectType->TypeInfo.OkayToCloseProcedure(PsGetCurrentProcess(),
|
|
Body,
|
|
Handle,
|
|
AccessMode))
|
|
{
|
|
/* Fail */
|
|
ObpCalloutEnd(CalloutIrql, "NtClose", ObjectType, Body);
|
|
ExUnlockHandleTableEntry(HandleTable, HandleEntry);
|
|
return STATUS_HANDLE_NOT_CLOSABLE;
|
|
}
|
|
|
|
/* Success, validate callout retrn */
|
|
ObpCalloutEnd(CalloutIrql, "NtClose", ObjectType, Body);
|
|
}
|
|
|
|
/* The callback allowed us to close it, but does the handle itself? */
|
|
if ((HandleEntry->ObAttributes & OBJ_PROTECT_CLOSE) &&
|
|
!(IgnoreHandleProtection))
|
|
{
|
|
/* It doesn't, are we from user mode? */
|
|
if (AccessMode != KernelMode)
|
|
{
|
|
/* We are! Unlock the entry */
|
|
ExUnlockHandleTableEntry(HandleTable, HandleEntry);
|
|
|
|
/* Make sure we have a debug port */
|
|
if (PsGetCurrentProcess()->DebugPort)
|
|
{
|
|
/* Raise an exception */
|
|
return KeRaiseUserException(STATUS_HANDLE_NOT_CLOSABLE);
|
|
}
|
|
else
|
|
{
|
|
/* Return the error instead */
|
|
return STATUS_HANDLE_NOT_CLOSABLE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, bugcheck the OS */
|
|
KeBugCheckEx(INVALID_KERNEL_HANDLE, (ULONG_PTR)Handle, 0, 0, 0);
|
|
}
|
|
}
|
|
|
|
/* Destroy and unlock the handle entry */
|
|
ExDestroyHandle(HandleTable, Handle, HandleEntry);
|
|
|
|
/* Now decrement the handle count */
|
|
ObpDecrementHandleCount(Body,
|
|
PsGetCurrentProcess(),
|
|
GrantedAccess,
|
|
ObjectType);
|
|
|
|
/* Dereference the object as well */
|
|
ObDereferenceObject(Body);
|
|
|
|
/* Return to caller */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Closed handle: %p for %p.\n",
|
|
__FUNCTION__,
|
|
Handle,
|
|
Body);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpIncrementHandleCount
|
|
*
|
|
* The ObpIncrementHandleCount routine <FILLMEIN>
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Process
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param OpenReason
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpIncrementHandleCount(IN PVOID Object,
|
|
IN PACCESS_STATE AccessState OPTIONAL,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
IN ULONG HandleAttributes,
|
|
IN PEPROCESS Process,
|
|
IN OB_OPEN_REASON OpenReason)
|
|
{
|
|
POBJECT_HEADER ObjectHeader;
|
|
POBJECT_TYPE ObjectType;
|
|
ULONG ProcessHandleCount;
|
|
NTSTATUS Status;
|
|
PEPROCESS ExclusiveProcess;
|
|
BOOLEAN Exclusive = FALSE, NewObject;
|
|
POBJECT_HEADER_CREATOR_INFO CreatorInfo;
|
|
KIRQL CalloutIrql;
|
|
KPROCESSOR_MODE ProbeMode;
|
|
ULONG Total;
|
|
POBJECT_HEADER_NAME_INFO NameInfo;
|
|
PAGED_CODE();
|
|
|
|
/* Get the object header and type */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
ObjectType = ObjectHeader->Type;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Incrementing count for: %p. Reason: %lx. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
OpenReason,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
|
|
/* Check if caller is forcing user mode */
|
|
if (HandleAttributes & OBJ_FORCE_ACCESS_CHECK)
|
|
{
|
|
/* Force it */
|
|
ProbeMode = UserMode;
|
|
}
|
|
else
|
|
{
|
|
/* Keep original setting */
|
|
ProbeMode = AccessMode;
|
|
}
|
|
|
|
/* Lock the object */
|
|
ObpAcquireObjectLock(ObjectHeader);
|
|
|
|
/* Charge quota and remove the creator info flag */
|
|
Status = ObpChargeQuotaForObject(ObjectHeader, ObjectType, &NewObject);
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
|
|
/* Check if the open is exclusive */
|
|
if (HandleAttributes & OBJ_EXCLUSIVE)
|
|
{
|
|
/* Check if the object allows this, or if the inherit flag was given */
|
|
if ((HandleAttributes & OBJ_INHERIT) ||
|
|
!(ObjectHeader->Flags & OB_FLAG_EXCLUSIVE))
|
|
{
|
|
/* Incorrect attempt */
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Check if we have access to it */
|
|
ExclusiveProcess = OBJECT_HEADER_TO_EXCLUSIVE_PROCESS(ObjectHeader);
|
|
if ((!(ExclusiveProcess) && (ObjectHeader->HandleCount)) ||
|
|
((ExclusiveProcess) && (ExclusiveProcess != PsGetCurrentProcess())))
|
|
{
|
|
/* This isn't the right process */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Now you got exclusive access */
|
|
Exclusive = TRUE;
|
|
}
|
|
else if ((ObjectHeader->Flags & OB_FLAG_EXCLUSIVE) &&
|
|
(OBJECT_HEADER_TO_EXCLUSIVE_PROCESS(ObjectHeader)))
|
|
{
|
|
/* Caller didn't want exclusive access, but the object is exclusive */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Check for exclusive kernel object */
|
|
NameInfo = OBJECT_HEADER_TO_NAME_INFO(ObjectHeader);
|
|
if ((NameInfo) && (NameInfo->QueryReferences & OB_FLAG_KERNEL_EXCLUSIVE) &&
|
|
(ProbeMode != KernelMode))
|
|
{
|
|
/* Caller is not kernel, but the object is kernel exclusive */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto Quickie;
|
|
}
|
|
|
|
/*
|
|
* Check if this is an object that went from 0 handles back to existence,
|
|
* but doesn't have an open procedure, only a close procedure. This means
|
|
* that it will never realize that the object is back alive, so we must
|
|
* fail the request.
|
|
*/
|
|
if (!(ObjectHeader->HandleCount) &&
|
|
!(NewObject) &&
|
|
(ObjectType->TypeInfo.MaintainHandleCount) &&
|
|
!(ObjectType->TypeInfo.OpenProcedure) &&
|
|
(ObjectType->TypeInfo.CloseProcedure))
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Check if we're opening an existing handle */
|
|
if ((OpenReason == ObOpenHandle) ||
|
|
((OpenReason == ObDuplicateHandle) && (AccessState)))
|
|
{
|
|
/* Validate the caller's access to this object */
|
|
if (!ObCheckObjectAccess(Object,
|
|
AccessState,
|
|
TRUE,
|
|
ProbeMode,
|
|
&Status))
|
|
{
|
|
/* Access was denied, so fail */
|
|
goto Quickie;
|
|
}
|
|
}
|
|
else if (OpenReason == ObCreateHandle)
|
|
{
|
|
/* Convert MAXIMUM_ALLOWED to GENERIC_ALL */
|
|
if (AccessState->RemainingDesiredAccess & MAXIMUM_ALLOWED)
|
|
{
|
|
/* Mask out MAXIMUM_ALLOWED and stick GENERIC_ALL instead */
|
|
AccessState->RemainingDesiredAccess &= ~MAXIMUM_ALLOWED;
|
|
AccessState->RemainingDesiredAccess |= GENERIC_ALL;
|
|
}
|
|
|
|
/* Check if we have to map the GENERIC mask */
|
|
if (AccessState->RemainingDesiredAccess & GENERIC_ACCESS)
|
|
{
|
|
/* Map it to the correct access masks */
|
|
RtlMapGenericMask(&AccessState->RemainingDesiredAccess,
|
|
&ObjectType->TypeInfo.GenericMapping);
|
|
}
|
|
|
|
/* Check if the caller is trying to access system security */
|
|
if (AccessState->RemainingDesiredAccess & ACCESS_SYSTEM_SECURITY)
|
|
{
|
|
/* FIXME: TODO */
|
|
DPRINT1("ACCESS_SYSTEM_SECURITY not validated!\n");
|
|
}
|
|
}
|
|
|
|
/* Check if this is an exclusive handle */
|
|
if (Exclusive)
|
|
{
|
|
/* Save the owner process */
|
|
OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader)->ExclusiveProcess = Process;
|
|
}
|
|
|
|
/* Increase the handle count */
|
|
InterlockedIncrementSizeT(&ObjectHeader->HandleCount);
|
|
ProcessHandleCount = 0;
|
|
|
|
/* Check if we have a handle database */
|
|
if (ObjectType->TypeInfo.MaintainHandleCount)
|
|
{
|
|
/* Increment the handle database */
|
|
Status = ObpIncrementHandleDataBase(ObjectHeader,
|
|
Process,
|
|
&ProcessHandleCount);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* FIXME: This should never happen for now */
|
|
DPRINT1("Unhandled case\n");
|
|
ASSERT(FALSE);
|
|
goto Quickie;
|
|
}
|
|
}
|
|
|
|
/* Release the lock */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
|
|
/* Check if we have an open procedure */
|
|
Status = STATUS_SUCCESS;
|
|
if (ObjectType->TypeInfo.OpenProcedure)
|
|
{
|
|
/* Call it */
|
|
ObpCalloutStart(&CalloutIrql);
|
|
Status = ObjectType->TypeInfo.OpenProcedure(OpenReason,
|
|
Process,
|
|
Object,
|
|
AccessState ?
|
|
AccessState->
|
|
PreviouslyGrantedAccess :
|
|
0,
|
|
ProcessHandleCount);
|
|
ObpCalloutEnd(CalloutIrql, "Open", ObjectType, Object);
|
|
|
|
/* Check if the open procedure failed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* FIXME: This should never happen for now */
|
|
DPRINT1("Unhandled case\n");
|
|
ASSERT(FALSE);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* Check if this is a create operation */
|
|
if (OpenReason == ObCreateHandle)
|
|
{
|
|
/* Check if we have creator info */
|
|
CreatorInfo = OBJECT_HEADER_TO_CREATOR_INFO(ObjectHeader);
|
|
if (CreatorInfo)
|
|
{
|
|
/* We do, acquire the lock */
|
|
ObpEnterObjectTypeMutex(ObjectType);
|
|
|
|
/* Insert us on the list */
|
|
InsertTailList(&ObjectType->TypeList, &CreatorInfo->TypeList);
|
|
|
|
/* Release the lock */
|
|
ObpLeaveObjectTypeMutex(ObjectType);
|
|
}
|
|
}
|
|
|
|
/* Increase total number of handles */
|
|
Total = InterlockedIncrement((PLONG)&ObjectType->TotalNumberOfHandles);
|
|
if (Total > ObjectType->HighWaterNumberOfHandles)
|
|
{
|
|
/* Fixup count */
|
|
ObjectType->HighWaterNumberOfHandles = Total;
|
|
}
|
|
|
|
/* Trace call and return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Incremented count for: %p. Reason: %lx HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
OpenReason,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
return Status;
|
|
|
|
Quickie:
|
|
/* Release lock and return */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpIncrementUnnamedHandleCount
|
|
*
|
|
* The ObpIncrementUnnamedHandleCount routine <FILLMEIN>
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Process
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param OpenReason
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpIncrementUnnamedHandleCount(IN PVOID Object,
|
|
IN PACCESS_MASK DesiredAccess,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
IN ULONG HandleAttributes,
|
|
IN PEPROCESS Process)
|
|
{
|
|
POBJECT_HEADER ObjectHeader;
|
|
POBJECT_TYPE ObjectType;
|
|
ULONG ProcessHandleCount;
|
|
NTSTATUS Status;
|
|
PEPROCESS ExclusiveProcess;
|
|
BOOLEAN Exclusive = FALSE, NewObject;
|
|
POBJECT_HEADER_CREATOR_INFO CreatorInfo;
|
|
KIRQL CalloutIrql;
|
|
ULONG Total;
|
|
|
|
/* Get the object header and type */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
ObjectType = ObjectHeader->Type;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Incrementing count for: %p. UNNAMED. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
|
|
/* Lock the object */
|
|
ObpAcquireObjectLock(ObjectHeader);
|
|
|
|
/* Charge quota and remove the creator info flag */
|
|
Status = ObpChargeQuotaForObject(ObjectHeader, ObjectType, &NewObject);
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
|
|
/* Check if the open is exclusive */
|
|
if (HandleAttributes & OBJ_EXCLUSIVE)
|
|
{
|
|
/* Check if the object allows this, or if the inherit flag was given */
|
|
if ((HandleAttributes & OBJ_INHERIT) ||
|
|
!(ObjectHeader->Flags & OB_FLAG_EXCLUSIVE))
|
|
{
|
|
/* Incorrect attempt */
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Check if we have access to it */
|
|
ExclusiveProcess = OBJECT_HEADER_TO_EXCLUSIVE_PROCESS(ObjectHeader);
|
|
if ((!(ExclusiveProcess) && (ObjectHeader->HandleCount)) ||
|
|
((ExclusiveProcess) && (ExclusiveProcess != PsGetCurrentProcess())))
|
|
{
|
|
/* This isn't the right process */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Now you got exclusive access */
|
|
Exclusive = TRUE;
|
|
}
|
|
else if ((ObjectHeader->Flags & OB_FLAG_EXCLUSIVE) &&
|
|
(OBJECT_HEADER_TO_EXCLUSIVE_PROCESS(ObjectHeader)))
|
|
{
|
|
/* Caller didn't want exclusive access, but the object is exclusive */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto Quickie;
|
|
}
|
|
|
|
/*
|
|
* Check if this is an object that went from 0 handles back to existence,
|
|
* but doesn't have an open procedure, only a close procedure. This means
|
|
* that it will never realize that the object is back alive, so we must
|
|
* fail the request.
|
|
*/
|
|
if (!(ObjectHeader->HandleCount) &&
|
|
!(NewObject) &&
|
|
(ObjectType->TypeInfo.MaintainHandleCount) &&
|
|
!(ObjectType->TypeInfo.OpenProcedure) &&
|
|
(ObjectType->TypeInfo.CloseProcedure))
|
|
{
|
|
/* Fail */
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
goto Quickie;
|
|
}
|
|
|
|
/* Convert MAXIMUM_ALLOWED to GENERIC_ALL */
|
|
if (*DesiredAccess & MAXIMUM_ALLOWED)
|
|
{
|
|
/* Mask out MAXIMUM_ALLOWED and stick GENERIC_ALL instead */
|
|
*DesiredAccess &= ~MAXIMUM_ALLOWED;
|
|
*DesiredAccess |= GENERIC_ALL;
|
|
}
|
|
|
|
/* Check if we have to map the GENERIC mask */
|
|
if (*DesiredAccess & GENERIC_ACCESS)
|
|
{
|
|
/* Map it to the correct access masks */
|
|
RtlMapGenericMask(DesiredAccess,
|
|
&ObjectType->TypeInfo.GenericMapping);
|
|
}
|
|
|
|
/* Check if this is an exclusive handle */
|
|
if (Exclusive)
|
|
{
|
|
/* Save the owner process */
|
|
OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader)->ExclusiveProcess = Process;
|
|
}
|
|
|
|
/* Increase the handle count */
|
|
InterlockedIncrementSizeT(&ObjectHeader->HandleCount);
|
|
ProcessHandleCount = 0;
|
|
|
|
/* Check if we have a handle database */
|
|
if (ObjectType->TypeInfo.MaintainHandleCount)
|
|
{
|
|
/* Increment the handle database */
|
|
Status = ObpIncrementHandleDataBase(ObjectHeader,
|
|
Process,
|
|
&ProcessHandleCount);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* FIXME: This should never happen for now */
|
|
DPRINT1("Unhandled case\n");
|
|
ASSERT(FALSE);
|
|
goto Quickie;
|
|
}
|
|
}
|
|
|
|
/* Release the lock */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
|
|
/* Check if we have an open procedure */
|
|
Status = STATUS_SUCCESS;
|
|
if (ObjectType->TypeInfo.OpenProcedure)
|
|
{
|
|
/* Call it */
|
|
ObpCalloutStart(&CalloutIrql);
|
|
Status = ObjectType->TypeInfo.OpenProcedure(ObCreateHandle,
|
|
Process,
|
|
Object,
|
|
*DesiredAccess,
|
|
ProcessHandleCount);
|
|
ObpCalloutEnd(CalloutIrql, "Open", ObjectType, Object);
|
|
|
|
/* Check if the open procedure failed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* FIXME: This should never happen for now */
|
|
DPRINT1("Unhandled case\n");
|
|
ASSERT(FALSE);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* Check if we have creator info */
|
|
CreatorInfo = OBJECT_HEADER_TO_CREATOR_INFO(ObjectHeader);
|
|
if (CreatorInfo)
|
|
{
|
|
/* We do, acquire the lock */
|
|
ObpEnterObjectTypeMutex(ObjectType);
|
|
|
|
/* Insert us on the list */
|
|
InsertTailList(&ObjectType->TypeList, &CreatorInfo->TypeList);
|
|
|
|
/* Release the lock */
|
|
ObpLeaveObjectTypeMutex(ObjectType);
|
|
}
|
|
|
|
/* Increase total number of handles */
|
|
Total = InterlockedIncrement((PLONG)&ObjectType->TotalNumberOfHandles);
|
|
if (Total > ObjectType->HighWaterNumberOfHandles)
|
|
{
|
|
/* Fixup count */
|
|
ObjectType->HighWaterNumberOfHandles = Total;
|
|
}
|
|
|
|
/* Trace call and return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Incremented count for: %p. UNNAMED HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
return Status;
|
|
|
|
Quickie:
|
|
/* Release lock and return */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpCreateUnnamedHandle
|
|
*
|
|
* The ObpCreateUnnamedHandle routine <FILLMEIN>
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param DesiredAccess
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AdditionalReferences
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ReturnedObject
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ReturnedHandle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpCreateUnnamedHandle(IN PVOID Object,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN ULONG AdditionalReferences,
|
|
IN ULONG HandleAttributes,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
OUT PVOID *ReturnedObject,
|
|
OUT PHANDLE ReturnedHandle)
|
|
{
|
|
HANDLE_TABLE_ENTRY NewEntry;
|
|
POBJECT_HEADER ObjectHeader;
|
|
HANDLE Handle;
|
|
KAPC_STATE ApcState;
|
|
BOOLEAN AttachedToProcess = FALSE, KernelHandle = FALSE;
|
|
PVOID HandleTable;
|
|
NTSTATUS Status;
|
|
ACCESS_MASK GrantedAccess;
|
|
POBJECT_TYPE ObjectType;
|
|
PAGED_CODE();
|
|
|
|
/* Get the object header and type */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
ObjectType = ObjectHeader->Type;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Creating handle for: %p. UNNAMED. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
|
|
/* Save the object header */
|
|
NewEntry.Object = ObjectHeader;
|
|
|
|
/* Mask out the internal attributes */
|
|
NewEntry.ObAttributes |= HandleAttributes & OBJ_HANDLE_ATTRIBUTES;
|
|
|
|
/* Check if this is a kernel handle */
|
|
if (HandleAttributes & OBJ_KERNEL_HANDLE)
|
|
{
|
|
/* Set the handle table */
|
|
HandleTable = ObpKernelHandleTable;
|
|
KernelHandle = TRUE;
|
|
|
|
/* Check if we're not in the system process */
|
|
if (PsGetCurrentProcess() != PsInitialSystemProcess)
|
|
{
|
|
/* Attach to the system process */
|
|
KeStackAttachProcess(&PsInitialSystemProcess->Pcb, &ApcState);
|
|
AttachedToProcess = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Get the current handle table */
|
|
HandleTable = PsGetCurrentProcess()->ObjectTable;
|
|
}
|
|
|
|
/* Increment the handle count */
|
|
Status = ObpIncrementUnnamedHandleCount(Object,
|
|
&DesiredAccess,
|
|
AccessMode,
|
|
HandleAttributes,
|
|
PsGetCurrentProcess());
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/*
|
|
* We failed (meaning security failure, according to NT Internals)
|
|
* detach and return
|
|
*/
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
return Status;
|
|
}
|
|
|
|
/* Remove what's not in the valid access mask */
|
|
GrantedAccess = DesiredAccess & (ObjectType->TypeInfo.ValidAccessMask |
|
|
ACCESS_SYSTEM_SECURITY);
|
|
|
|
/* Handle extra references */
|
|
if (AdditionalReferences)
|
|
{
|
|
/* Add them to the header */
|
|
InterlockedExchangeAddSizeT(&ObjectHeader->PointerCount,
|
|
AdditionalReferences);
|
|
}
|
|
|
|
/* Save the access mask */
|
|
NewEntry.GrantedAccess = GrantedAccess;
|
|
|
|
/*
|
|
* Create the actual handle. We'll need to do this *after* calling
|
|
* ObpIncrementHandleCount to make sure that Object Security is valid
|
|
* (specified in Gl00my documentation on Ob)
|
|
*/
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Handle Properties: [%p-%lx-%lx]\n",
|
|
__FUNCTION__,
|
|
NewEntry.Object, NewEntry.ObAttributes & 3, NewEntry.GrantedAccess);
|
|
Handle = ExCreateHandle(HandleTable, &NewEntry);
|
|
|
|
/* Make sure we got a handle */
|
|
if (Handle)
|
|
{
|
|
/* Check if this was a kernel handle */
|
|
if (KernelHandle) Handle = ObMarkHandleAsKernelHandle(Handle);
|
|
|
|
/* Return handle and object */
|
|
*ReturnedHandle = Handle;
|
|
|
|
/* Return the new object only if caller wanted it biased */
|
|
if ((AdditionalReferences) && (ReturnedObject))
|
|
{
|
|
/* Return it */
|
|
*ReturnedObject = Object;
|
|
}
|
|
|
|
/* Detach if needed */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
|
|
/* Trace and return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Returning Handle: %p HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Handle,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Handle extra references */
|
|
if (AdditionalReferences)
|
|
{
|
|
/* Dereference it as many times as required */
|
|
InterlockedExchangeAddSizeT(&ObjectHeader->PointerCount,
|
|
-(LONG)AdditionalReferences);
|
|
}
|
|
|
|
/* Decrement the handle count and detach */
|
|
ObpDecrementHandleCount(&ObjectHeader->Body,
|
|
PsGetCurrentProcess(),
|
|
GrantedAccess,
|
|
ObjectType);
|
|
|
|
/* Detach and fail */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpCreateHandle
|
|
*
|
|
* The ObpCreateHandle routine <FILLMEIN>
|
|
*
|
|
* @param OpenReason
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Type
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AdditionalReferences
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ReturnedObject
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ReturnedHandle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks Cleans up the Lookup Context on return.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpCreateHandle(IN OB_OPEN_REASON OpenReason,
|
|
IN PVOID Object,
|
|
IN POBJECT_TYPE Type OPTIONAL,
|
|
IN PACCESS_STATE AccessState,
|
|
IN ULONG AdditionalReferences,
|
|
IN ULONG HandleAttributes,
|
|
IN POBP_LOOKUP_CONTEXT Context,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
OUT PVOID *ReturnedObject,
|
|
OUT PHANDLE ReturnedHandle)
|
|
{
|
|
HANDLE_TABLE_ENTRY NewEntry;
|
|
POBJECT_HEADER ObjectHeader;
|
|
HANDLE Handle;
|
|
KAPC_STATE ApcState;
|
|
BOOLEAN AttachedToProcess = FALSE, KernelHandle = FALSE;
|
|
POBJECT_TYPE ObjectType;
|
|
PVOID HandleTable;
|
|
NTSTATUS Status;
|
|
ACCESS_MASK DesiredAccess, GrantedAccess;
|
|
PAUX_ACCESS_DATA AuxData;
|
|
PAGED_CODE();
|
|
|
|
/* Get the object header and type */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
ObjectType = ObjectHeader->Type;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Creating handle for: %p. Reason: %lx. HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
OpenReason,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
|
|
/* Check if the types match */
|
|
if ((Type) && (ObjectType != Type))
|
|
{
|
|
/* They don't, cleanup */
|
|
if (Context) ObpReleaseLookupContext(Context);
|
|
return STATUS_OBJECT_TYPE_MISMATCH;
|
|
}
|
|
|
|
/* Save the object header */
|
|
NewEntry.Object = ObjectHeader;
|
|
|
|
/* Check if this is a kernel handle */
|
|
if (HandleAttributes & OBJ_KERNEL_HANDLE)
|
|
{
|
|
/* Set the handle table */
|
|
HandleTable = ObpKernelHandleTable;
|
|
KernelHandle = TRUE;
|
|
|
|
/* Check if we're not in the system process */
|
|
if (PsGetCurrentProcess() != PsInitialSystemProcess)
|
|
{
|
|
/* Attach to the system process */
|
|
KeStackAttachProcess(&PsInitialSystemProcess->Pcb, &ApcState);
|
|
AttachedToProcess = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Get the current handle table */
|
|
HandleTable = PsGetCurrentProcess()->ObjectTable;
|
|
}
|
|
|
|
/* Increment the handle count */
|
|
Status = ObpIncrementHandleCount(Object,
|
|
AccessState,
|
|
AccessMode,
|
|
HandleAttributes,
|
|
PsGetCurrentProcess(),
|
|
OpenReason);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/*
|
|
* We failed (meaning security failure, according to NT Internals)
|
|
* detach and return
|
|
*/
|
|
if (Context) ObpReleaseLookupContext(Context);
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
return Status;
|
|
}
|
|
|
|
/* Check if we are doing audits on close */
|
|
if (AccessState->GenerateOnClose)
|
|
{
|
|
/* Force the attribute on */
|
|
HandleAttributes |= OBJ_AUDIT_OBJECT_CLOSE;
|
|
}
|
|
|
|
/* Mask out the internal attributes */
|
|
NewEntry.ObAttributes |= (HandleAttributes & OBJ_HANDLE_ATTRIBUTES);
|
|
|
|
/* Get the original desired access */
|
|
DesiredAccess = AccessState->RemainingDesiredAccess |
|
|
AccessState->PreviouslyGrantedAccess;
|
|
|
|
/* Remove what's not in the valid access mask */
|
|
GrantedAccess = DesiredAccess & (ObjectType->TypeInfo.ValidAccessMask |
|
|
ACCESS_SYSTEM_SECURITY);
|
|
|
|
/* Update the value in the access state */
|
|
AccessState->PreviouslyGrantedAccess = GrantedAccess;
|
|
|
|
/* Get the auxiliary data */
|
|
AuxData = AccessState->AuxData;
|
|
|
|
/* Handle extra references */
|
|
if (AdditionalReferences)
|
|
{
|
|
/* Add them to the header */
|
|
InterlockedExchangeAddSizeT(&ObjectHeader->PointerCount,
|
|
AdditionalReferences);
|
|
}
|
|
|
|
/* Now we can release the object */
|
|
if (Context) ObpReleaseLookupContext(Context);
|
|
|
|
/* Save the access mask */
|
|
NewEntry.GrantedAccess = GrantedAccess;
|
|
|
|
/*
|
|
* Create the actual handle. We'll need to do this *after* calling
|
|
* ObpIncrementHandleCount to make sure that Object Security is valid
|
|
* (specified in Gl00my documentation on Ob)
|
|
*/
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Handle Properties: [%p-%lx-%lx]\n",
|
|
__FUNCTION__,
|
|
NewEntry.Object, NewEntry.ObAttributes & 3, NewEntry.GrantedAccess);
|
|
Handle = ExCreateHandle(HandleTable, &NewEntry);
|
|
|
|
/* Make sure we got a handle */
|
|
if (Handle)
|
|
{
|
|
/* Check if this was a kernel handle */
|
|
if (KernelHandle) Handle = ObMarkHandleAsKernelHandle(Handle);
|
|
|
|
/* Return it */
|
|
*ReturnedHandle = Handle;
|
|
|
|
/* Check if we need to generate on audit */
|
|
if (AccessState->GenerateAudit)
|
|
{
|
|
/* Audit the handle creation */
|
|
//SeAuditHandleCreation(AccessState, Handle);
|
|
}
|
|
|
|
/* Check if this was a create */
|
|
if (OpenReason == ObCreateHandle)
|
|
{
|
|
/* Check if we need to audit the privileges */
|
|
if ((AuxData->PrivilegeSet) &&
|
|
(AuxData->PrivilegeSet->PrivilegeCount))
|
|
{
|
|
/* Do the audit */
|
|
#if 0
|
|
SePrivilegeObjectAuditAlarm(Handle,
|
|
&AccessState->
|
|
SubjectSecurityContext,
|
|
GrantedAccess,
|
|
AuxData->PrivilegeSet,
|
|
TRUE,
|
|
ExGetPreviousMode());
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Return the new object only if caller wanted it biased */
|
|
if ((AdditionalReferences) && (ReturnedObject))
|
|
{
|
|
/* Return it */
|
|
*ReturnedObject = Object;
|
|
}
|
|
|
|
/* Detach if needed */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
|
|
/* Trace and return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Returning Handle: %p HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
Handle,
|
|
ObjectHeader->HandleCount,
|
|
ObjectHeader->PointerCount);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Decrement the handle count and detach */
|
|
ObpDecrementHandleCount(&ObjectHeader->Body,
|
|
PsGetCurrentProcess(),
|
|
GrantedAccess,
|
|
ObjectType);
|
|
|
|
/* Handle extra references */
|
|
if (AdditionalReferences)
|
|
{
|
|
/* Check how many extra references were added */
|
|
if (AdditionalReferences > 1)
|
|
{
|
|
/* Dereference it many times */
|
|
InterlockedExchangeAddSizeT(&ObjectHeader->PointerCount,
|
|
-(LONG)(AdditionalReferences - 1));
|
|
}
|
|
|
|
/* Dereference the object one last time */
|
|
ObDereferenceObject(Object);
|
|
}
|
|
|
|
/* Detach if necessary and fail */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpCloseHandle
|
|
*
|
|
* The ObpCloseHandle routine <FILLMEIN>
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpCloseHandle(IN HANDLE Handle,
|
|
IN KPROCESSOR_MODE AccessMode)
|
|
{
|
|
PVOID HandleTable;
|
|
BOOLEAN AttachedToProcess = FALSE;
|
|
KAPC_STATE ApcState;
|
|
PHANDLE_TABLE_ENTRY HandleTableEntry;
|
|
NTSTATUS Status;
|
|
PEPROCESS Process = PsGetCurrentProcess();
|
|
PAGED_CODE();
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Closing handle: %p\n", __FUNCTION__, Handle);
|
|
|
|
if (AccessMode == KernelMode && Handle == (HANDLE)-1)
|
|
return STATUS_INVALID_HANDLE;
|
|
|
|
/* Check if we're dealing with a kernel handle */
|
|
if (ObpIsKernelHandle(Handle, AccessMode))
|
|
{
|
|
/* Use the kernel table and convert the handle */
|
|
HandleTable = ObpKernelHandleTable;
|
|
Handle = ObKernelHandleToHandle(Handle);
|
|
|
|
/* Check if we're not in the system process */
|
|
if (Process != PsInitialSystemProcess)
|
|
{
|
|
/* Attach to the system process */
|
|
KeStackAttachProcess(&PsInitialSystemProcess->Pcb, &ApcState);
|
|
AttachedToProcess = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Use the process's handle table */
|
|
HandleTable = Process->ObjectTable;
|
|
}
|
|
|
|
/* Enter a critical region to protect handle access */
|
|
KeEnterCriticalRegion();
|
|
|
|
/* Get the handle entry */
|
|
HandleTableEntry = ExMapHandleToPointer(HandleTable, Handle);
|
|
if (HandleTableEntry)
|
|
{
|
|
/* Now close the entry */
|
|
Status = ObpCloseHandleTableEntry(HandleTable,
|
|
HandleTableEntry,
|
|
Handle,
|
|
AccessMode,
|
|
FALSE);
|
|
|
|
/* We can quit the critical region now */
|
|
KeLeaveCriticalRegion();
|
|
|
|
/* Detach and return success */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
}
|
|
else
|
|
{
|
|
/* We failed, quit the critical region */
|
|
KeLeaveCriticalRegion();
|
|
|
|
/* Detach */
|
|
if (AttachedToProcess) KeUnstackDetachProcess(&ApcState);
|
|
|
|
/* Check if we have a valid handle that's not the process or thread */
|
|
if ((Handle) &&
|
|
(Handle != NtCurrentProcess()) &&
|
|
(Handle != NtCurrentThread()))
|
|
{
|
|
/* Check if we came from user mode */
|
|
if (AccessMode != KernelMode)
|
|
{
|
|
/* Check if we have no debug port */
|
|
if (Process->DebugPort)
|
|
{
|
|
/* Make sure we're not attached */
|
|
if (!KeIsAttachedProcess())
|
|
{
|
|
/* Raise an exception */
|
|
return KeRaiseUserException(STATUS_INVALID_HANDLE);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* This is kernel mode. Check if we're exiting */
|
|
if (!(PsIsThreadTerminating(PsGetCurrentThread())) &&
|
|
(Process->Peb))
|
|
{
|
|
/* Check if the debugger is enabled */
|
|
if (KdDebuggerEnabled)
|
|
{
|
|
/* Bugcheck */
|
|
KeBugCheckEx(INVALID_KERNEL_HANDLE, (ULONG_PTR)Handle, 1, 0, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set invalid status */
|
|
Status = STATUS_INVALID_HANDLE;
|
|
}
|
|
|
|
/* Return status */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Closed handle: %p S: %lx\n",
|
|
__FUNCTION__, Handle, Status);
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpSetHandleAttributes
|
|
*
|
|
* The ObpSetHandleAttributes routine <FILLMEIN>
|
|
*
|
|
* @param HandleTableEntry
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Context
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
BOOLEAN
|
|
NTAPI
|
|
ObpSetHandleAttributes(IN OUT PHANDLE_TABLE_ENTRY HandleTableEntry,
|
|
IN ULONG_PTR Context)
|
|
{
|
|
POBP_SET_HANDLE_ATTRIBUTES_CONTEXT SetHandleInfo = (PVOID)Context;
|
|
POBJECT_HEADER ObjectHeader = ObpGetHandleObject(HandleTableEntry);
|
|
|
|
/* Check if making the handle inheritable */
|
|
if (SetHandleInfo->Information.Inherit)
|
|
{
|
|
/* Check if inheriting is not supported for this object */
|
|
if (ObjectHeader->Type->TypeInfo.InvalidAttributes & OBJ_INHERIT)
|
|
{
|
|
/* Fail without changing anything */
|
|
return FALSE;
|
|
}
|
|
|
|
/* Set the flag */
|
|
HandleTableEntry->ObAttributes |= OBJ_INHERIT;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise this implies we're removing the flag */
|
|
HandleTableEntry->ObAttributes &= ~OBJ_INHERIT;
|
|
}
|
|
|
|
/* Check if making the handle protected */
|
|
if (SetHandleInfo->Information.ProtectFromClose)
|
|
{
|
|
/* Set the flag */
|
|
HandleTableEntry->GrantedAccess |= ObpAccessProtectCloseBit;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, remove it */
|
|
HandleTableEntry->GrantedAccess &= ~ObpAccessProtectCloseBit;
|
|
}
|
|
|
|
/* Return success */
|
|
return TRUE;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpCloseHandleCallback
|
|
*
|
|
* The ObpCloseHandleCallback routine <FILLMEIN>
|
|
*
|
|
* @param HandleTable
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param GrantedAccess
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Context
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
BOOLEAN
|
|
NTAPI
|
|
ObpCloseHandleCallback(IN PHANDLE_TABLE_ENTRY HandleTableEntry,
|
|
IN HANDLE Handle,
|
|
IN PVOID Context)
|
|
{
|
|
POBP_CLOSE_HANDLE_CONTEXT CloseContext = (POBP_CLOSE_HANDLE_CONTEXT)Context;
|
|
|
|
/* Simply decrement the handle count */
|
|
ObpCloseHandleTableEntry(CloseContext->HandleTable,
|
|
HandleTableEntry,
|
|
Handle,
|
|
CloseContext->AccessMode,
|
|
TRUE);
|
|
return TRUE;
|
|
}
|
|
|
|
/*++
|
|
* @name ObpDuplicateHandleCallback
|
|
*
|
|
* The ObpDuplicateHandleCallback routine <FILLMEIN>
|
|
*
|
|
* @param HandleTable
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleTableEntry
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Context
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
BOOLEAN
|
|
NTAPI
|
|
ObpDuplicateHandleCallback(IN PEPROCESS Process,
|
|
IN PHANDLE_TABLE HandleTable,
|
|
IN PHANDLE_TABLE_ENTRY OldEntry,
|
|
IN PHANDLE_TABLE_ENTRY HandleTableEntry)
|
|
{
|
|
POBJECT_HEADER ObjectHeader;
|
|
BOOLEAN Ret = FALSE;
|
|
ACCESS_STATE AccessState;
|
|
NTSTATUS Status;
|
|
PAGED_CODE();
|
|
|
|
/* Make sure that the handle is inheritable */
|
|
Ret = (HandleTableEntry->ObAttributes & OBJ_INHERIT) != 0;
|
|
if (Ret)
|
|
{
|
|
/* Get the object header */
|
|
ObjectHeader = ObpGetHandleObject(HandleTableEntry);
|
|
|
|
/* Increment the pointer count */
|
|
InterlockedIncrementSizeT(&ObjectHeader->PointerCount);
|
|
|
|
/* Release the handle lock */
|
|
ExUnlockHandleTableEntry(HandleTable, OldEntry);
|
|
|
|
/* Setup the access state */
|
|
AccessState.PreviouslyGrantedAccess = HandleTableEntry->GrantedAccess;
|
|
|
|
/* Call the shared routine for incrementing handles */
|
|
Status = ObpIncrementHandleCount(&ObjectHeader->Body,
|
|
&AccessState,
|
|
KernelMode,
|
|
HandleTableEntry->ObAttributes & OBJ_HANDLE_ATTRIBUTES,
|
|
Process,
|
|
ObInheritHandle);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Return failure */
|
|
ObDereferenceObject(&ObjectHeader->Body);
|
|
Ret = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Release the handle lock */
|
|
ExUnlockHandleTableEntry(HandleTable, OldEntry);
|
|
}
|
|
|
|
/* Return duplication result */
|
|
return Ret;
|
|
}
|
|
|
|
/*++
|
|
* @name ObClearProcessHandleTable
|
|
*
|
|
* The ObClearProcessHandleTable routine clears the handle table
|
|
* of the given process.
|
|
*
|
|
* @param Process
|
|
* The process of which the handle table should be cleared.
|
|
*
|
|
* @return None.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
VOID
|
|
NTAPI
|
|
ObClearProcessHandleTable(IN PEPROCESS Process)
|
|
{
|
|
PHANDLE_TABLE HandleTable;
|
|
OBP_CLOSE_HANDLE_CONTEXT Context;
|
|
KAPC_STATE ApcState;
|
|
BOOLEAN AttachedToProcess = FALSE;
|
|
|
|
ASSERT(Process);
|
|
|
|
/* Ensure the handle table doesn't go away while we use it */
|
|
HandleTable = ObReferenceProcessHandleTable(Process);
|
|
if (!HandleTable) return;
|
|
|
|
/* Attach to the current process if needed */
|
|
if (PsGetCurrentProcess() != Process)
|
|
{
|
|
KeStackAttachProcess(&Process->Pcb, &ApcState);
|
|
AttachedToProcess = TRUE;
|
|
}
|
|
|
|
/* Enter a critical region */
|
|
KeEnterCriticalRegion();
|
|
|
|
/* Fill out the context */
|
|
Context.AccessMode = UserMode;
|
|
Context.HandleTable = HandleTable;
|
|
|
|
/* Sweep the handle table to close all handles */
|
|
ExSweepHandleTable(HandleTable,
|
|
ObpCloseHandleCallback,
|
|
&Context);
|
|
|
|
/* Leave the critical region */
|
|
KeLeaveCriticalRegion();
|
|
|
|
/* Detach if needed */
|
|
if (AttachedToProcess)
|
|
KeUnstackDetachProcess(&ApcState);
|
|
|
|
/* Let the handle table go */
|
|
ObDereferenceProcessHandleTable(Process);
|
|
}
|
|
|
|
/*++
|
|
* @name ObInitProcess
|
|
*
|
|
* The ObInitProcess routine initializes the handle table for the process
|
|
* to be initialized, by either creating a new one or duplicating it from
|
|
* the parent process.
|
|
*
|
|
* @param Parent
|
|
* A parent process (optional).
|
|
*
|
|
* @param Process
|
|
* The process to initialize.
|
|
*
|
|
* @return Success or failure.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObInitProcess(IN PEPROCESS Parent OPTIONAL,
|
|
IN PEPROCESS Process)
|
|
{
|
|
PHANDLE_TABLE ParentTable, ObjectTable;
|
|
|
|
/* Check for a parent */
|
|
if (Parent)
|
|
{
|
|
/* Reference the parent's table */
|
|
ParentTable = ObReferenceProcessHandleTable(Parent);
|
|
if (!ParentTable) return STATUS_PROCESS_IS_TERMINATING;
|
|
|
|
/* Duplicate it */
|
|
ObjectTable = ExDupHandleTable(Process,
|
|
ParentTable,
|
|
ObpDuplicateHandleCallback,
|
|
OBJ_INHERIT);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise just create a new table */
|
|
ParentTable = NULL;
|
|
ObjectTable = ExCreateHandleTable(Process);
|
|
}
|
|
|
|
/* Make sure we have a table */
|
|
if (ObjectTable)
|
|
{
|
|
/* Associate it */
|
|
Process->ObjectTable = ObjectTable;
|
|
|
|
/* Check for auditing */
|
|
if (SeDetailedAuditingWithToken(NULL))
|
|
{
|
|
/* FIXME: TODO */
|
|
DPRINT1("Need auditing!\n");
|
|
}
|
|
|
|
/* Get rid of the old table now */
|
|
if (ParentTable) ObDereferenceProcessHandleTable(Parent);
|
|
|
|
/* We are done */
|
|
return STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
/* Fail */
|
|
Process->ObjectTable = NULL;
|
|
if (ParentTable) ObDereferenceProcessHandleTable(Parent);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
|
|
/*++
|
|
* @name ObKillProcess
|
|
*
|
|
* The ObKillProcess routine performs rundown operations on the process,
|
|
* then clears and destroys its handle table.
|
|
*
|
|
* @param Process
|
|
* The process to be killed.
|
|
*
|
|
* @return None.
|
|
*
|
|
* @remarks Called by the Object Manager cleanup code (kernel)
|
|
* when a process is to be destroyed.
|
|
*
|
|
*--*/
|
|
VOID
|
|
NTAPI
|
|
ObKillProcess(IN PEPROCESS Process)
|
|
{
|
|
PHANDLE_TABLE HandleTable;
|
|
OBP_CLOSE_HANDLE_CONTEXT Context;
|
|
BOOLEAN HardErrors;
|
|
PAGED_CODE();
|
|
|
|
/* Wait for process rundown and then complete it */
|
|
ExWaitForRundownProtectionRelease(&Process->RundownProtect);
|
|
ExRundownCompleted(&Process->RundownProtect);
|
|
|
|
/* Get the object table */
|
|
HandleTable = Process->ObjectTable;
|
|
if (!HandleTable) return;
|
|
|
|
/* Disable hard errors while we close handles */
|
|
HardErrors = IoSetThreadHardErrorMode(FALSE);
|
|
|
|
/* Enter a critical region */
|
|
KeEnterCriticalRegion();
|
|
|
|
/* Fill out the context */
|
|
Context.AccessMode = KernelMode;
|
|
Context.HandleTable = HandleTable;
|
|
|
|
/* Sweep the handle table to close all handles */
|
|
ExSweepHandleTable(HandleTable,
|
|
ObpCloseHandleCallback,
|
|
&Context);
|
|
ASSERT(HandleTable->HandleCount == 0);
|
|
|
|
/* Leave the critical region */
|
|
KeLeaveCriticalRegion();
|
|
|
|
/* Re-enable hard errors */
|
|
IoSetThreadHardErrorMode(HardErrors);
|
|
|
|
/* Destroy the object table */
|
|
Process->ObjectTable = NULL;
|
|
ExDestroyHandleTable(HandleTable, NULL);
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
ObDuplicateObject(IN PEPROCESS SourceProcess,
|
|
IN HANDLE SourceHandle,
|
|
IN PEPROCESS TargetProcess OPTIONAL,
|
|
IN PHANDLE TargetHandle OPTIONAL,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN ULONG HandleAttributes,
|
|
IN ULONG Options,
|
|
IN KPROCESSOR_MODE PreviousMode)
|
|
{
|
|
HANDLE_TABLE_ENTRY NewHandleEntry;
|
|
BOOLEAN AttachedToProcess = FALSE;
|
|
PVOID SourceObject;
|
|
POBJECT_HEADER ObjectHeader;
|
|
POBJECT_TYPE ObjectType;
|
|
HANDLE NewHandle;
|
|
KAPC_STATE ApcState;
|
|
NTSTATUS Status;
|
|
ACCESS_MASK TargetAccess, SourceAccess;
|
|
ACCESS_STATE AccessState;
|
|
PACCESS_STATE PassedAccessState = NULL;
|
|
AUX_ACCESS_DATA AuxData;
|
|
PHANDLE_TABLE HandleTable;
|
|
OBJECT_HANDLE_INFORMATION HandleInformation;
|
|
ULONG AuditMask;
|
|
BOOLEAN KernelHandle = FALSE;
|
|
|
|
PAGED_CODE();
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Duplicating handle: %p for %p into %p\n",
|
|
__FUNCTION__,
|
|
SourceHandle,
|
|
SourceProcess,
|
|
TargetProcess);
|
|
|
|
/* Assume failure */
|
|
if (TargetHandle) *TargetHandle = NULL;
|
|
|
|
/* Check if we're not duplicating the same access */
|
|
if (!(Options & DUPLICATE_SAME_ACCESS))
|
|
{
|
|
/* Validate the desired access */
|
|
Status = STATUS_SUCCESS; //ObpValidateDesiredAccess(DesiredAccess);
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
}
|
|
|
|
/* Reference the object table */
|
|
HandleTable = ObReferenceProcessHandleTable(SourceProcess);
|
|
if (!HandleTable) return STATUS_PROCESS_IS_TERMINATING;
|
|
|
|
/* Reference the process object */
|
|
Status = ObpReferenceProcessObjectByHandle(SourceHandle,
|
|
SourceProcess,
|
|
HandleTable,
|
|
PreviousMode,
|
|
&SourceObject,
|
|
&HandleInformation,
|
|
&AuditMask);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Fail */
|
|
ObDereferenceProcessHandleTable(SourceProcess);
|
|
return Status;
|
|
}
|
|
else
|
|
{
|
|
/* Check if we have to don't have to audit object close */
|
|
if (!(HandleInformation.HandleAttributes & OBJ_AUDIT_OBJECT_CLOSE))
|
|
{
|
|
/* Then there is no audit mask */
|
|
AuditMask = 0;
|
|
}
|
|
}
|
|
|
|
/* Check if there's no target process */
|
|
if (!TargetProcess)
|
|
{
|
|
/* Check if the caller wanted actual duplication */
|
|
if (!(Options & DUPLICATE_CLOSE_SOURCE))
|
|
{
|
|
/* Invalid request */
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, do the attach */
|
|
KeStackAttachProcess(&SourceProcess->Pcb, &ApcState);
|
|
|
|
/* Close the handle and detach */
|
|
NtClose(SourceHandle);
|
|
KeUnstackDetachProcess(&ApcState);
|
|
}
|
|
|
|
/* Return */
|
|
ObDereferenceProcessHandleTable(SourceProcess);
|
|
ObDereferenceObject(SourceObject);
|
|
return Status;
|
|
}
|
|
|
|
/* Create a kernel handle if asked, but only in the system process */
|
|
if (PreviousMode == KernelMode &&
|
|
HandleAttributes & OBJ_KERNEL_HANDLE &&
|
|
TargetProcess == PsInitialSystemProcess)
|
|
{
|
|
KernelHandle = TRUE;
|
|
}
|
|
|
|
/* Get the target handle table */
|
|
HandleTable = ObReferenceProcessHandleTable(TargetProcess);
|
|
if (!HandleTable)
|
|
{
|
|
/* Check if the caller wanted us to close the handle */
|
|
if (Options & DUPLICATE_CLOSE_SOURCE)
|
|
{
|
|
/* Do the attach */
|
|
KeStackAttachProcess(&SourceProcess->Pcb, &ApcState);
|
|
|
|
/* Close the handle and detach */
|
|
NtClose(SourceHandle);
|
|
KeUnstackDetachProcess(&ApcState);
|
|
}
|
|
|
|
/* Return */
|
|
ObDereferenceProcessHandleTable(SourceProcess);
|
|
ObDereferenceObject(SourceObject);
|
|
return STATUS_PROCESS_IS_TERMINATING;
|
|
}
|
|
|
|
/* Get the source access */
|
|
SourceAccess = HandleInformation.GrantedAccess;
|
|
|
|
/* Check if we're not in the target process */
|
|
if (TargetProcess != PsGetCurrentProcess())
|
|
{
|
|
/* Attach to it */
|
|
KeStackAttachProcess(&TargetProcess->Pcb, &ApcState);
|
|
AttachedToProcess = TRUE;
|
|
}
|
|
|
|
/* Check if we're duplicating the attributes */
|
|
if (Options & DUPLICATE_SAME_ATTRIBUTES)
|
|
{
|
|
/* Duplicate them */
|
|
HandleAttributes = HandleInformation.HandleAttributes;
|
|
}
|
|
else
|
|
{
|
|
/* Don't allow caller to bypass auditing */
|
|
HandleAttributes |= HandleInformation.HandleAttributes &
|
|
OBJ_AUDIT_OBJECT_CLOSE;
|
|
}
|
|
|
|
/* Check if we're duplicating the access */
|
|
if (Options & DUPLICATE_SAME_ACCESS) DesiredAccess = SourceAccess;
|
|
|
|
/* Get object data */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(SourceObject);
|
|
ObjectType = ObjectHeader->Type;
|
|
|
|
/* Fill out the entry */
|
|
RtlZeroMemory(&NewHandleEntry, sizeof(HANDLE_TABLE_ENTRY));
|
|
NewHandleEntry.Object = ObjectHeader;
|
|
NewHandleEntry.ObAttributes |= (HandleAttributes & OBJ_HANDLE_ATTRIBUTES);
|
|
|
|
/* Check if we're using a generic mask */
|
|
if (DesiredAccess & GENERIC_ACCESS)
|
|
{
|
|
/* Map it */
|
|
RtlMapGenericMask(&DesiredAccess,
|
|
&ObjectType->TypeInfo.GenericMapping);
|
|
}
|
|
|
|
/* Set the target access, always propagate ACCESS_SYSTEM_SECURITY */
|
|
TargetAccess = DesiredAccess & (ObjectType->TypeInfo.ValidAccessMask |
|
|
ACCESS_SYSTEM_SECURITY);
|
|
NewHandleEntry.GrantedAccess = TargetAccess;
|
|
|
|
/* Check if we're asking for new access */
|
|
if (TargetAccess & ~SourceAccess)
|
|
{
|
|
/* We are. We need the security procedure to validate this */
|
|
if (ObjectType->TypeInfo.SecurityProcedure == SeDefaultObjectMethod)
|
|
{
|
|
/* Use our built-in access state */
|
|
PassedAccessState = &AccessState;
|
|
Status = SeCreateAccessState(&AccessState,
|
|
&AuxData,
|
|
TargetAccess,
|
|
&ObjectType->TypeInfo.GenericMapping);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise we can't allow this privilege elevation */
|
|
Status = STATUS_ACCESS_DENIED;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* We don't need an access state */
|
|
Status = STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Make sure the access state was created OK */
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
/* Add a new handle */
|
|
Status = ObpIncrementHandleCount(SourceObject,
|
|
PassedAccessState,
|
|
PreviousMode,
|
|
HandleAttributes,
|
|
PsGetCurrentProcess(),
|
|
ObDuplicateHandle);
|
|
}
|
|
|
|
/* Check if we were attached */
|
|
if (AttachedToProcess)
|
|
{
|
|
/* We can safely detach now */
|
|
KeUnstackDetachProcess(&ApcState);
|
|
AttachedToProcess = FALSE;
|
|
}
|
|
|
|
/* Check if we have to close the source handle */
|
|
if (Options & DUPLICATE_CLOSE_SOURCE)
|
|
{
|
|
/* Attach and close */
|
|
KeStackAttachProcess(&SourceProcess->Pcb, &ApcState);
|
|
NtClose(SourceHandle);
|
|
KeUnstackDetachProcess(&ApcState);
|
|
}
|
|
|
|
/* Check if we had an access state */
|
|
if (PassedAccessState) SeDeleteAccessState(PassedAccessState);
|
|
|
|
/* Now check if incrementing actually failed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Dereference handle tables */
|
|
ObDereferenceProcessHandleTable(SourceProcess);
|
|
ObDereferenceProcessHandleTable(TargetProcess);
|
|
|
|
/* Dereference the source object */
|
|
ObDereferenceObject(SourceObject);
|
|
return Status;
|
|
}
|
|
|
|
/* Now create the handle */
|
|
NewHandle = ExCreateHandle(HandleTable, &NewHandleEntry);
|
|
if (!NewHandle)
|
|
{
|
|
/* Undo the increment */
|
|
ObpDecrementHandleCount(SourceObject,
|
|
TargetProcess,
|
|
TargetAccess,
|
|
ObjectType);
|
|
|
|
/* Deference the object and set failure status */
|
|
ObDereferenceObject(SourceObject);
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Mark it as a kernel handle if requested */
|
|
if (KernelHandle)
|
|
{
|
|
NewHandle = ObMarkHandleAsKernelHandle(NewHandle);
|
|
}
|
|
|
|
/* Return the handle */
|
|
if (TargetHandle) *TargetHandle = NewHandle;
|
|
|
|
/* Dereference handle tables */
|
|
ObDereferenceProcessHandleTable(SourceProcess);
|
|
ObDereferenceProcessHandleTable(TargetProcess);
|
|
|
|
/* Return status */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Duplicated handle: %p for %p into %p. Source: %p HC PC %lx %lx\n",
|
|
__FUNCTION__,
|
|
NewHandle,
|
|
SourceProcess,
|
|
TargetProcess,
|
|
SourceObject,
|
|
ObjectHeader->PointerCount,
|
|
ObjectHeader->HandleCount);
|
|
return Status;
|
|
}
|
|
|
|
/* PUBLIC FUNCTIONS *********************************************************/
|
|
|
|
/*++
|
|
* @name ObOpenObjectByName
|
|
* @implemented NT4
|
|
*
|
|
* The ObOpenObjectByName routine <FILLMEIN>
|
|
*
|
|
* @param ObjectAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ObjectType
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param PassedAccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param DesiredAccess
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ParseContext
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes,
|
|
IN POBJECT_TYPE ObjectType,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
IN PACCESS_STATE PassedAccessState,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN OUT PVOID ParseContext,
|
|
OUT PHANDLE Handle)
|
|
{
|
|
PVOID Object = NULL;
|
|
UNICODE_STRING ObjectName;
|
|
NTSTATUS Status, Status2;
|
|
POBJECT_HEADER ObjectHeader;
|
|
PGENERIC_MAPPING GenericMapping = NULL;
|
|
OB_OPEN_REASON OpenReason;
|
|
POB_TEMP_BUFFER TempBuffer;
|
|
PAGED_CODE();
|
|
|
|
/* Assume failure */
|
|
*Handle = NULL;
|
|
|
|
/* Check if we didn't get any Object Attributes */
|
|
if (!ObjectAttributes)
|
|
{
|
|
/* Fail with special status code */
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Allocate the temporary buffer */
|
|
TempBuffer = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(OB_TEMP_BUFFER),
|
|
TAG_OB_TEMP_STORAGE);
|
|
if (!TempBuffer) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Capture all the info */
|
|
Status = ObpCaptureObjectCreateInformation(ObjectAttributes,
|
|
AccessMode,
|
|
AccessMode,
|
|
TRUE,
|
|
&TempBuffer->ObjectCreateInfo,
|
|
&ObjectName);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Fail */
|
|
ExFreePoolWithTag(TempBuffer, TAG_OB_TEMP_STORAGE);
|
|
return Status;
|
|
}
|
|
|
|
/* Check if we didn't get an access state */
|
|
if (!PassedAccessState)
|
|
{
|
|
/* Try to get the generic mapping if we can */
|
|
if (ObjectType) GenericMapping = &ObjectType->TypeInfo.GenericMapping;
|
|
|
|
/* Use our built-in access state */
|
|
PassedAccessState = &TempBuffer->LocalAccessState;
|
|
Status = SeCreateAccessState(&TempBuffer->LocalAccessState,
|
|
&TempBuffer->AuxData,
|
|
DesiredAccess,
|
|
GenericMapping);
|
|
if (!NT_SUCCESS(Status)) goto Quickie;
|
|
}
|
|
|
|
/* Get the security descriptor */
|
|
if (TempBuffer->ObjectCreateInfo.SecurityDescriptor)
|
|
{
|
|
/* Save it in the access state */
|
|
PassedAccessState->SecurityDescriptor =
|
|
TempBuffer->ObjectCreateInfo.SecurityDescriptor;
|
|
}
|
|
|
|
/* Validate the access mask */
|
|
Status = ObpValidateAccessMask(PassedAccessState);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Cleanup after lookup */
|
|
ObpReleaseLookupContext(&TempBuffer->LookupContext);
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Now do the lookup */
|
|
Status = ObpLookupObjectName(TempBuffer->ObjectCreateInfo.RootDirectory,
|
|
&ObjectName,
|
|
TempBuffer->ObjectCreateInfo.Attributes,
|
|
ObjectType,
|
|
AccessMode,
|
|
ParseContext,
|
|
TempBuffer->ObjectCreateInfo.SecurityQos,
|
|
NULL,
|
|
PassedAccessState,
|
|
&TempBuffer->LookupContext,
|
|
&Object);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Cleanup after lookup */
|
|
ObpReleaseLookupContext(&TempBuffer->LookupContext);
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Check if this object has create information */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
if (ObjectHeader->Flags & OB_FLAG_CREATE_INFO)
|
|
{
|
|
/* Then we are creating a new handle */
|
|
OpenReason = ObCreateHandle;
|
|
|
|
/* Check if we still have create info */
|
|
if (ObjectHeader->ObjectCreateInfo)
|
|
{
|
|
/* Free it */
|
|
ObpFreeObjectCreateInformation(ObjectHeader->
|
|
ObjectCreateInfo);
|
|
ObjectHeader->ObjectCreateInfo = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, we are merely opening it */
|
|
OpenReason = ObOpenHandle;
|
|
}
|
|
|
|
/* Check if we have invalid object attributes */
|
|
if (ObjectHeader->Type->TypeInfo.InvalidAttributes &
|
|
TempBuffer->ObjectCreateInfo.Attributes)
|
|
{
|
|
/* Set failure code */
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
|
|
/* Cleanup after lookup */
|
|
ObpReleaseLookupContext(&TempBuffer->LookupContext);
|
|
|
|
/* Dereference the object */
|
|
ObDereferenceObject(Object);
|
|
}
|
|
else
|
|
{
|
|
/* Create the actual handle now */
|
|
Status2 = ObpCreateHandle(OpenReason,
|
|
Object,
|
|
ObjectType,
|
|
PassedAccessState,
|
|
0,
|
|
TempBuffer->ObjectCreateInfo.Attributes,
|
|
&TempBuffer->LookupContext,
|
|
AccessMode,
|
|
NULL,
|
|
Handle);
|
|
if (!NT_SUCCESS(Status2))
|
|
{
|
|
ObDereferenceObject(Object);
|
|
Status = Status2;
|
|
}
|
|
}
|
|
|
|
Cleanup:
|
|
/* Delete the access state */
|
|
if (PassedAccessState == &TempBuffer->LocalAccessState)
|
|
{
|
|
SeDeleteAccessState(PassedAccessState);
|
|
}
|
|
|
|
Quickie:
|
|
/* Release the object attributes and temporary buffer */
|
|
ObpReleaseObjectCreateInformation(&TempBuffer->ObjectCreateInfo);
|
|
if (ObjectName.Buffer) ObpFreeObjectNameBuffer(&ObjectName);
|
|
ExFreePoolWithTag(TempBuffer, TAG_OB_TEMP_STORAGE);
|
|
|
|
/* Return status */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - returning Object %p with PC S: %lx %lx\n",
|
|
__FUNCTION__,
|
|
Object,
|
|
Object ? OBJECT_TO_OBJECT_HEADER(Object)->PointerCount : -1,
|
|
Status);
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name ObOpenObjectByPointer
|
|
* @implemented NT4
|
|
*
|
|
* The ObOpenObjectByPointer routine <FILLMEIN>
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleAttributes
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param PassedAccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param DesiredAccess
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ObjectType
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObOpenObjectByPointer(IN PVOID Object,
|
|
IN ULONG HandleAttributes,
|
|
IN PACCESS_STATE PassedAccessState,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN POBJECT_TYPE ObjectType,
|
|
IN KPROCESSOR_MODE AccessMode,
|
|
OUT PHANDLE Handle)
|
|
{
|
|
POBJECT_HEADER Header;
|
|
NTSTATUS Status;
|
|
ACCESS_STATE AccessState;
|
|
AUX_ACCESS_DATA AuxData;
|
|
PAGED_CODE();
|
|
|
|
/* Assume failure */
|
|
*Handle = NULL;
|
|
|
|
/* Reference the object */
|
|
Status = ObReferenceObjectByPointer(Object,
|
|
0,
|
|
ObjectType,
|
|
AccessMode);
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
|
|
/* Get the Header Info */
|
|
Header = OBJECT_TO_OBJECT_HEADER(Object);
|
|
|
|
/* Check if we didn't get an access state */
|
|
if (!PassedAccessState)
|
|
{
|
|
/* Use our built-in access state */
|
|
PassedAccessState = &AccessState;
|
|
Status = SeCreateAccessState(&AccessState,
|
|
&AuxData,
|
|
DesiredAccess,
|
|
&Header->Type->TypeInfo.GenericMapping);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Fail */
|
|
ObDereferenceObject(Object);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* Check if we have invalid object attributes */
|
|
if (Header->Type->TypeInfo.InvalidAttributes & HandleAttributes)
|
|
{
|
|
/* Delete the access state */
|
|
if (PassedAccessState == &AccessState)
|
|
{
|
|
SeDeleteAccessState(PassedAccessState);
|
|
}
|
|
|
|
/* Dereference the object */
|
|
ObDereferenceObject(Object);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Create the handle */
|
|
Status = ObpCreateHandle(ObOpenHandle,
|
|
Object,
|
|
ObjectType,
|
|
PassedAccessState,
|
|
0,
|
|
HandleAttributes,
|
|
NULL,
|
|
AccessMode,
|
|
NULL,
|
|
Handle);
|
|
if (!NT_SUCCESS(Status)) ObDereferenceObject(Object);
|
|
|
|
/* Delete the access state */
|
|
if (PassedAccessState == &AccessState)
|
|
{
|
|
SeDeleteAccessState(PassedAccessState);
|
|
}
|
|
|
|
/* Return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - returning Object with PC S: %lx %lx\n",
|
|
__FUNCTION__,
|
|
OBJECT_TO_OBJECT_HEADER(Object)->PointerCount,
|
|
Status);
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name ObFindHandleForObject
|
|
* @implemented NT4
|
|
*
|
|
* The ObFindHandleForObject routine <FILLMEIN>
|
|
*
|
|
* @param Process
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ObjectType
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleInformation
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleReturn
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
BOOLEAN
|
|
NTAPI
|
|
ObFindHandleForObject(IN PEPROCESS Process,
|
|
IN PVOID Object,
|
|
IN POBJECT_TYPE ObjectType,
|
|
IN POBJECT_HANDLE_INFORMATION HandleInformation,
|
|
OUT PHANDLE Handle)
|
|
{
|
|
OBP_FIND_HANDLE_DATA FindData;
|
|
BOOLEAN Result = FALSE;
|
|
PVOID ObjectTable;
|
|
|
|
/* Make sure we have an object table */
|
|
ObjectTable = ObReferenceProcessHandleTable(Process);
|
|
if (ObjectTable)
|
|
{
|
|
/* Check if we have an object */
|
|
if (Object)
|
|
{
|
|
/* Set its header */
|
|
FindData.ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, no object to match*/
|
|
FindData.ObjectHeader = NULL;
|
|
}
|
|
|
|
/* Set other information */
|
|
FindData.ObjectType = ObjectType;
|
|
FindData.HandleInformation = HandleInformation;
|
|
|
|
/* Enumerate the handle table */
|
|
if (ExEnumHandleTable(Process->ObjectTable,
|
|
ObpEnumFindHandleProcedure,
|
|
&FindData,
|
|
Handle))
|
|
{
|
|
/* Set success */
|
|
Result = TRUE;
|
|
}
|
|
|
|
/* Let go of the table */
|
|
ObDereferenceProcessHandleTable(Process);
|
|
}
|
|
|
|
/* Return the result */
|
|
return Result;
|
|
}
|
|
|
|
/*++
|
|
* @name ObInsertObject
|
|
* @implemented NT4
|
|
*
|
|
* The ObInsertObject routine <FILLMEIN>
|
|
*
|
|
* @param Object
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param PassedAccessState
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param DesiredAccess
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AdditionalReferences
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param ReferencedObject
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObInsertObject(IN PVOID Object,
|
|
IN PACCESS_STATE AccessState OPTIONAL,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN ULONG ObjectPointerBias,
|
|
OUT PVOID *NewObject OPTIONAL,
|
|
OUT PHANDLE Handle)
|
|
{
|
|
POBJECT_CREATE_INFORMATION ObjectCreateInfo;
|
|
POBJECT_HEADER ObjectHeader;
|
|
POBJECT_TYPE ObjectType;
|
|
PUNICODE_STRING ObjectName;
|
|
PVOID InsertObject;
|
|
PSECURITY_DESCRIPTOR ParentDescriptor = NULL;
|
|
BOOLEAN SdAllocated = FALSE;
|
|
POBJECT_HEADER_NAME_INFO ObjectNameInfo;
|
|
OBP_LOOKUP_CONTEXT Context;
|
|
ACCESS_STATE LocalAccessState;
|
|
AUX_ACCESS_DATA AuxData;
|
|
OB_OPEN_REASON OpenReason;
|
|
KPROCESSOR_MODE PreviousMode;
|
|
NTSTATUS Status = STATUS_SUCCESS, RealStatus;
|
|
BOOLEAN IsNewObject;
|
|
PAGED_CODE();
|
|
|
|
/* Get the Header */
|
|
ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
|
|
|
|
/* Detect invalid insert */
|
|
if (!(ObjectHeader->Flags & OB_FLAG_CREATE_INFO))
|
|
{
|
|
/* Display warning and break into debugger */
|
|
DPRINT1("OB: Attempting to insert existing object %p\n", Object);
|
|
DbgBreakPoint();
|
|
|
|
/* Allow debugger to continue */
|
|
ObDereferenceObject(Object);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Get the create and name info, as well as the object type */
|
|
ObjectCreateInfo = ObjectHeader->ObjectCreateInfo;
|
|
ObjectNameInfo = ObpReferenceNameInfo(ObjectHeader);
|
|
ObjectType = ObjectHeader->Type;
|
|
ObjectName = NULL;
|
|
|
|
/* Check if this is an named object */
|
|
if ((ObjectNameInfo) && (ObjectNameInfo->Name.Buffer))
|
|
{
|
|
/* Get the object name */
|
|
ObjectName = &ObjectNameInfo->Name;
|
|
}
|
|
|
|
/* Sanity check */
|
|
ASSERT((Handle) ||
|
|
((ObjectPointerBias == 0) &&
|
|
(ObjectName == NULL) &&
|
|
(ObjectType->TypeInfo.SecurityRequired) &&
|
|
(NewObject == NULL)));
|
|
|
|
/* Check if the object is unnamed and also doesn't have security */
|
|
PreviousMode = KeGetPreviousMode();
|
|
if (!(ObjectType->TypeInfo.SecurityRequired) && !(ObjectName))
|
|
{
|
|
/* Assume failure */
|
|
*Handle = NULL;
|
|
ObjectHeader->ObjectCreateInfo = NULL;
|
|
|
|
/* Create the handle */
|
|
Status = ObpCreateUnnamedHandle(Object,
|
|
DesiredAccess,
|
|
ObjectPointerBias + 1,
|
|
ObjectCreateInfo->Attributes,
|
|
PreviousMode,
|
|
NewObject,
|
|
Handle);
|
|
|
|
/* Free the create information */
|
|
ObpFreeObjectCreateInformation(ObjectCreateInfo);
|
|
|
|
/* Release the object name information */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
|
|
/* Remove the extra keep-alive reference */
|
|
ObDereferenceObject(Object);
|
|
|
|
/* Return */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - returning Object with PC S: %lx %lx\n",
|
|
__FUNCTION__,
|
|
ObjectHeader->PointerCount,
|
|
Status);
|
|
return Status;
|
|
}
|
|
|
|
/* Check if we didn't get an access state */
|
|
if (!AccessState)
|
|
{
|
|
/* Use our built-in access state */
|
|
AccessState = &LocalAccessState;
|
|
Status = SeCreateAccessState(&LocalAccessState,
|
|
&AuxData,
|
|
DesiredAccess,
|
|
&ObjectType->TypeInfo.GenericMapping);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Fail */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
ObDereferenceObject(Object);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* Save the security descriptor */
|
|
AccessState->SecurityDescriptor = ObjectCreateInfo->SecurityDescriptor;
|
|
|
|
/* Validate the access mask */
|
|
Status = ObpValidateAccessMask(AccessState);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Fail */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
ObDereferenceObject(Object);
|
|
return Status;
|
|
}
|
|
|
|
/* Setup a lookup context */
|
|
ObpInitializeLookupContext(&Context);
|
|
InsertObject = Object;
|
|
OpenReason = ObCreateHandle;
|
|
|
|
/* Check if the object is named */
|
|
if (ObjectName)
|
|
{
|
|
/* Look it up */
|
|
Status = ObpLookupObjectName(ObjectCreateInfo->RootDirectory,
|
|
ObjectName,
|
|
ObjectCreateInfo->Attributes,
|
|
ObjectType,
|
|
(ObjectHeader->Flags & OB_FLAG_KERNEL_MODE) ?
|
|
KernelMode : UserMode,
|
|
ObjectCreateInfo->ParseContext,
|
|
ObjectCreateInfo->SecurityQos,
|
|
Object,
|
|
AccessState,
|
|
&Context,
|
|
&InsertObject);
|
|
|
|
/* Check if we found an object that doesn't match the one requested */
|
|
if ((NT_SUCCESS(Status)) && (InsertObject) && (Object != InsertObject))
|
|
{
|
|
/* This means we're opening an object, not creating a new one */
|
|
OpenReason = ObOpenHandle;
|
|
|
|
/* Make sure the caller said it's OK to do this */
|
|
if (ObjectCreateInfo->Attributes & OBJ_OPENIF)
|
|
{
|
|
/* He did, but did he want this type? */
|
|
if (ObjectType != OBJECT_TO_OBJECT_HEADER(InsertObject)->Type)
|
|
{
|
|
/* Wrong type, so fail */
|
|
Status = STATUS_OBJECT_TYPE_MISMATCH;
|
|
}
|
|
else
|
|
{
|
|
/* Right type, so warn */
|
|
Status = STATUS_OBJECT_NAME_EXISTS;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Check if this was a symbolic link */
|
|
if (OBJECT_TO_OBJECT_HEADER(InsertObject)->Type ==
|
|
ObpSymbolicLinkObjectType)
|
|
{
|
|
/* Dereference it */
|
|
ObDereferenceObject(InsertObject);
|
|
}
|
|
|
|
/* Caller wanted to create a new object, fail */
|
|
Status = STATUS_OBJECT_NAME_COLLISION;
|
|
}
|
|
}
|
|
|
|
/* Check if anything until now failed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Cleanup after lookup */
|
|
ObpReleaseLookupContext(&Context);
|
|
|
|
/* Remove query reference that we added */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
|
|
/* Dereference the object and delete the access state */
|
|
ObDereferenceObject(Object);
|
|
if (AccessState == &LocalAccessState)
|
|
{
|
|
/* We used a local one; delete it */
|
|
SeDeleteAccessState(AccessState);
|
|
}
|
|
|
|
/* Return failure code */
|
|
return Status;
|
|
}
|
|
else
|
|
{
|
|
/* Check if this is a symbolic link */
|
|
if (ObjectType == ObpSymbolicLinkObjectType)
|
|
{
|
|
/* Create the internal name */
|
|
ObpCreateSymbolicLinkName(Object);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now check if this object is being created */
|
|
if (InsertObject == Object)
|
|
{
|
|
/* Check if it's named or forces security */
|
|
if ((ObjectName) || (ObjectType->TypeInfo.SecurityRequired))
|
|
{
|
|
/* Make sure it's inserted into an object directory */
|
|
if ((ObjectNameInfo) && (ObjectNameInfo->Directory))
|
|
{
|
|
/* Get the current descriptor */
|
|
ObGetObjectSecurity(ObjectNameInfo->Directory,
|
|
&ParentDescriptor,
|
|
&SdAllocated);
|
|
}
|
|
|
|
/* Now assign it */
|
|
Status = ObAssignSecurity(AccessState,
|
|
ParentDescriptor,
|
|
Object,
|
|
ObjectType);
|
|
|
|
/* Check if we captured one */
|
|
if (ParentDescriptor)
|
|
{
|
|
/* We did, release it */
|
|
ObReleaseObjectSecurity(ParentDescriptor, SdAllocated);
|
|
}
|
|
else if (NT_SUCCESS(Status))
|
|
{
|
|
/* Other we didn't, but we were able to use the current SD */
|
|
SeReleaseSecurityDescriptor(ObjectCreateInfo->SecurityDescriptor,
|
|
ObjectCreateInfo->ProbeMode,
|
|
TRUE);
|
|
|
|
/* Clear the current one */
|
|
AccessState->SecurityDescriptor =
|
|
ObjectCreateInfo->SecurityDescriptor = NULL;
|
|
}
|
|
}
|
|
|
|
/* Check if anything until now failed */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* Check if the directory was added */
|
|
if (Context.DirectoryLocked)
|
|
{
|
|
/* Weird case where we need to do a manual delete */
|
|
DPRINT1("Unhandled path\n");
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
/* Cleanup the lookup */
|
|
ObpReleaseLookupContext(&Context);
|
|
|
|
/* Remove query reference that we added */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
|
|
/* Dereference the object and delete the access state */
|
|
ObDereferenceObject(Object);
|
|
if (AccessState == &LocalAccessState)
|
|
{
|
|
/* We used a local one; delete it */
|
|
SeDeleteAccessState(AccessState);
|
|
}
|
|
|
|
/* Return failure code */
|
|
ASSERT(FALSE);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/* Save the actual status until here */
|
|
RealStatus = Status;
|
|
|
|
/* Check if caller wants us to create a handle */
|
|
ObjectHeader->ObjectCreateInfo = NULL;
|
|
if (Handle)
|
|
{
|
|
/* Create the handle */
|
|
Status = ObpCreateHandle(OpenReason,
|
|
InsertObject,
|
|
NULL,
|
|
AccessState,
|
|
ObjectPointerBias + 1,
|
|
ObjectCreateInfo->Attributes,
|
|
&Context,
|
|
PreviousMode,
|
|
NewObject,
|
|
Handle);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
/* If the object had a name, backout everything */
|
|
if (ObjectName) ObpDeleteNameCheck(Object);
|
|
|
|
/* Return the status of the failure */
|
|
*Handle = NULL;
|
|
RealStatus = Status;
|
|
}
|
|
|
|
/* Remove a query reference */
|
|
ObpDereferenceNameInfo(ObjectNameInfo);
|
|
|
|
/* Remove the extra keep-alive reference */
|
|
ObDereferenceObject(Object);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, lock the object */
|
|
ObpAcquireObjectLock(ObjectHeader);
|
|
|
|
/* And charge quota for the process to make it appear as used */
|
|
RealStatus = ObpChargeQuotaForObject(ObjectHeader,
|
|
ObjectType,
|
|
&IsNewObject);
|
|
|
|
/* Release the lock */
|
|
ObpReleaseObjectLock(ObjectHeader);
|
|
|
|
/* Check if we failed and dereference the object if so */
|
|
if (!NT_SUCCESS(RealStatus)) ObDereferenceObject(Object);
|
|
}
|
|
|
|
/* We can delete the Create Info now */
|
|
ObpFreeObjectCreateInformation(ObjectCreateInfo);
|
|
|
|
/* Check if we created our own access state and delete it if so */
|
|
if (AccessState == &LocalAccessState) SeDeleteAccessState(AccessState);
|
|
|
|
/* Return status code */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - returning Object with PC RS/S: %lx %lx %lx\n",
|
|
__FUNCTION__,
|
|
OBJECT_TO_OBJECT_HEADER(Object)->PointerCount,
|
|
RealStatus, Status);
|
|
return RealStatus;
|
|
}
|
|
|
|
/*++
|
|
* @name ObSetHandleAttributes
|
|
* @implemented NT5.1
|
|
*
|
|
* The ObSetHandleAttributes routine <FILLMEIN>
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param HandleFlags
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param PreviousMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObSetHandleAttributes(IN HANDLE Handle,
|
|
IN POBJECT_HANDLE_ATTRIBUTE_INFORMATION HandleFlags,
|
|
IN KPROCESSOR_MODE PreviousMode)
|
|
{
|
|
OBP_SET_HANDLE_ATTRIBUTES_CONTEXT SetHandleAttributesContext;
|
|
BOOLEAN Result, AttachedToSystemProcess = FALSE;
|
|
PHANDLE_TABLE HandleTable;
|
|
KAPC_STATE ApcState;
|
|
PAGED_CODE();
|
|
|
|
/* Check if this is a kernel handle */
|
|
if (ObpIsKernelHandle(Handle, PreviousMode))
|
|
{
|
|
/* Use the kernel table and convert the handle */
|
|
HandleTable = ObpKernelHandleTable;
|
|
Handle = ObKernelHandleToHandle(Handle);
|
|
|
|
/* Check if we're not in the system process */
|
|
if (PsGetCurrentProcess() != PsInitialSystemProcess)
|
|
{
|
|
/* Attach to the system process */
|
|
KeStackAttachProcess(&PsInitialSystemProcess->Pcb, &ApcState);
|
|
AttachedToSystemProcess = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Get the current process' handle table */
|
|
HandleTable = PsGetCurrentProcess()->ObjectTable;
|
|
}
|
|
|
|
/* Initialize the handle attribute context */
|
|
SetHandleAttributesContext.PreviousMode = PreviousMode;
|
|
SetHandleAttributesContext.Information = *HandleFlags;
|
|
|
|
/* Invoke the ObpSetHandleAttributes callback */
|
|
Result = ExChangeHandle(HandleTable,
|
|
Handle,
|
|
ObpSetHandleAttributes,
|
|
(ULONG_PTR)&SetHandleAttributesContext);
|
|
|
|
/* Did we attach to the system process? */
|
|
if (AttachedToSystemProcess)
|
|
{
|
|
/* Detach from it */
|
|
KeUnstackDetachProcess(&ApcState);
|
|
}
|
|
|
|
/* Return the result as an NTSTATUS value */
|
|
return Result ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
/*++
|
|
* @name ObCloseHandle
|
|
* @implemented NT5.1
|
|
*
|
|
* The ObCloseHandle routine <FILLMEIN>
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @param AccessMode
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
ObCloseHandle(IN HANDLE Handle,
|
|
IN KPROCESSOR_MODE AccessMode)
|
|
{
|
|
/* Call the internal API */
|
|
return ObpCloseHandle(Handle, AccessMode);
|
|
}
|
|
|
|
/*++
|
|
* @name NtClose
|
|
* @implemented NT4
|
|
*
|
|
* The NtClose routine <FILLMEIN>
|
|
*
|
|
* @param Handle
|
|
* <FILLMEIN>.
|
|
*
|
|
* @return <FILLMEIN>.
|
|
*
|
|
* @remarks None.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
NtClose(IN HANDLE Handle)
|
|
{
|
|
/* Call the internal API */
|
|
return ObpCloseHandle(Handle, ExGetPreviousMode());
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
NtDuplicateObject(IN HANDLE SourceProcessHandle,
|
|
IN HANDLE SourceHandle,
|
|
IN HANDLE TargetProcessHandle OPTIONAL,
|
|
OUT PHANDLE TargetHandle OPTIONAL,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN ULONG HandleAttributes,
|
|
IN ULONG Options)
|
|
{
|
|
PEPROCESS SourceProcess, TargetProcess, Target;
|
|
HANDLE hTarget;
|
|
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
|
|
NTSTATUS Status;
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Duplicating handle: %p for %p into %p.\n",
|
|
__FUNCTION__,
|
|
SourceHandle,
|
|
SourceProcessHandle,
|
|
TargetProcessHandle);
|
|
|
|
/* Check if we have a target handle */
|
|
if ((TargetHandle) && (PreviousMode != KernelMode))
|
|
{
|
|
/* Enter SEH */
|
|
_SEH2_TRY
|
|
{
|
|
/* Probe the handle and assume failure */
|
|
ProbeForWriteHandle(TargetHandle);
|
|
*TargetHandle = NULL;
|
|
}
|
|
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
|
|
{
|
|
/* Return the exception code */
|
|
_SEH2_YIELD(return _SEH2_GetExceptionCode());
|
|
}
|
|
_SEH2_END;
|
|
}
|
|
|
|
/* Now reference the input handle */
|
|
Status = ObReferenceObjectByHandle(SourceProcessHandle,
|
|
PROCESS_DUP_HANDLE,
|
|
PsProcessType,
|
|
PreviousMode,
|
|
(PVOID*)&SourceProcess,
|
|
NULL);
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
|
|
/* Check if got a target handle */
|
|
if (TargetProcessHandle)
|
|
{
|
|
/* Now reference the output handle */
|
|
Status = ObReferenceObjectByHandle(TargetProcessHandle,
|
|
PROCESS_DUP_HANDLE,
|
|
PsProcessType,
|
|
PreviousMode,
|
|
(PVOID*)&TargetProcess,
|
|
NULL);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
/* Use this target process */
|
|
Target = TargetProcess;
|
|
}
|
|
else
|
|
{
|
|
/* No target process */
|
|
Target = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No target process */
|
|
Status = STATUS_SUCCESS;
|
|
Target = NULL;
|
|
}
|
|
|
|
/* Call the internal routine */
|
|
Status = ObDuplicateObject(SourceProcess,
|
|
SourceHandle,
|
|
Target,
|
|
&hTarget,
|
|
DesiredAccess,
|
|
HandleAttributes,
|
|
Options,
|
|
PreviousMode);
|
|
|
|
/* Check if the caller wanted the return handle */
|
|
if (TargetHandle)
|
|
{
|
|
/* Protect the write to user mode */
|
|
_SEH2_TRY
|
|
{
|
|
/* Write the new handle */
|
|
*TargetHandle = hTarget;
|
|
}
|
|
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
|
|
{
|
|
/* Otherwise, get the exception code */
|
|
Status = _SEH2_GetExceptionCode();
|
|
}
|
|
_SEH2_END;
|
|
}
|
|
|
|
/* Dereference the processes */
|
|
OBTRACE(OB_HANDLE_DEBUG,
|
|
"%s - Duplicated handle: %p into %p S %lx\n",
|
|
__FUNCTION__,
|
|
hTarget,
|
|
TargetProcessHandle,
|
|
Status);
|
|
if (Target) ObDereferenceObject(Target);
|
|
ObDereferenceObject(SourceProcess);
|
|
return Status;
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
ObIsKernelHandle(IN HANDLE Handle)
|
|
{
|
|
/* Use the inlined version. We know we are in kernel mode. */
|
|
return ObpIsKernelHandle(Handle, KernelMode);
|
|
}
|
|
|
|
/* EOF */
|