obhandle.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for obhandle.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	TAG_OB_HANDLE   'dHbO'

Functions
PHANDLE_TABLE NTAPI	ObReferenceProcessHandleTable (IN PEPROCESS Process)
VOID NTAPI	ObDereferenceProcessHandleTable (IN PEPROCESS Process)
ULONG NTAPI	ObGetProcessHandleCount (IN PEPROCESS Process)
NTSTATUS NTAPI	ObpReferenceProcessObjectByHandle (IN HANDLE Handle, IN PEPROCESS Process, IN PHANDLE_TABLE HandleTable, IN KPROCESSOR_MODE AccessMode, OUT PVOID *Object, OUT POBJECT_HANDLE_INFORMATION HandleInformation, OUT PACCESS_MASK AuditMask)
BOOLEAN NTAPI	ObpEnumFindHandleProcedure (IN PHANDLE_TABLE_ENTRY HandleEntry, IN HANDLE Handle, IN PVOID Context)
POBJECT_HANDLE_COUNT_ENTRY NTAPI	ObpInsertHandleCount (IN POBJECT_HEADER ObjectHeader)
NTSTATUS NTAPI	ObpIncrementHandleDataBase (IN POBJECT_HEADER ObjectHeader, IN PEPROCESS Process, IN OUT PULONG NewProcessHandleCount)
NTSTATUS NTAPI	ObpChargeQuotaForObject (IN POBJECT_HEADER ObjectHeader, IN POBJECT_TYPE ObjectType, OUT PBOOLEAN NewObject)
NTSTATUS NTAPI	ObpValidateAccessMask (IN PACCESS_STATE AccessState)
VOID NTAPI	ObpDecrementHandleCount (IN PVOID ObjectBody, IN PEPROCESS Process, IN ACCESS_MASK GrantedAccess, IN POBJECT_TYPE ObjectType)
NTSTATUS NTAPI	ObpCloseHandleTableEntry (IN PHANDLE_TABLE HandleTable, IN PHANDLE_TABLE_ENTRY HandleEntry, IN HANDLE Handle, IN KPROCESSOR_MODE AccessMode, IN BOOLEAN IgnoreHandleProtection)
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)
NTSTATUS NTAPI	ObpIncrementUnnamedHandleCount (IN PVOID Object, IN PACCESS_MASK DesiredAccess, IN KPROCESSOR_MODE AccessMode, IN ULONG HandleAttributes, IN PEPROCESS Process)
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)
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)
NTSTATUS NTAPI	ObpCloseHandle (IN HANDLE Handle, IN KPROCESSOR_MODE AccessMode)
BOOLEAN NTAPI	ObpSetHandleAttributes (IN OUT PHANDLE_TABLE_ENTRY HandleTableEntry, IN ULONG_PTR Context)
BOOLEAN NTAPI	ObpCloseHandleCallback (IN PHANDLE_TABLE_ENTRY HandleTableEntry, IN HANDLE Handle, IN PVOID Context)
BOOLEAN NTAPI	ObpDuplicateHandleCallback (IN PEPROCESS Process, IN PHANDLE_TABLE HandleTable, IN PHANDLE_TABLE_ENTRY OldEntry, IN PHANDLE_TABLE_ENTRY HandleTableEntry)
VOID NTAPI	ObClearProcessHandleTable (IN PEPROCESS Process)
NTSTATUS NTAPI	ObInitProcess (IN PEPROCESS Parent OPTIONAL, IN PEPROCESS Process)
VOID NTAPI	ObKillProcess (IN PEPROCESS Process)
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)
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)
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)
BOOLEAN NTAPI	ObFindHandleForObject (IN PEPROCESS Process, IN PVOID Object, IN POBJECT_TYPE ObjectType, IN POBJECT_HANDLE_INFORMATION HandleInformation, OUT PHANDLE Handle)
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)
NTSTATUS NTAPI	ObSetHandleAttributes (IN HANDLE Handle, IN POBJECT_HANDLE_ATTRIBUTE_INFORMATION HandleFlags, IN KPROCESSOR_MODE PreviousMode)
NTSTATUS NTAPI	ObCloseHandle (IN HANDLE Handle, IN KPROCESSOR_MODE AccessMode)
NTSTATUS NTAPI	NtClose (IN HANDLE Handle)
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)
BOOLEAN NTAPI	ObIsKernelHandle (IN HANDLE Handle)

Variables
PHANDLE_TABLE	ObpKernelHandleTable = NULL
ULONG	ObpAccessProtectCloseBit = MAXIMUM_ALLOWED

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 17 of file obhandle.c.

TAG_OB_HANDLE

#define TAG_OB_HANDLE   'dHbO'

Definition at line 23 of file obhandle.c.

Function Documentation

NtClose()

NTSTATUS NTAPI NtClose

(

IN HANDLE

Handle

)

Definition at line 3399 of file obhandle.c.

{
    /* Call the internal API */
    return ObpCloseHandle(Handle, ExGetPreviousMode());
}

Referenced by _At_(), _main(), _MyGetFileSystem(), _tmain(), AccpCloseObjectHandle(), AddCodepageToRegistry(), AddFontsSettingsToRegistry(), AddHotkeySettings(), AddKbLayoutsToRegistry(), AddPartitionToDisk(), AfdBind(), AfdConnect(), AfdSend(), AfdSendTo(), BaseComputeProcessDllPath(), BaseGetNamedObjectDirectory(), BaseInitializeStaticServerData(), BasepCopyFileExW(), BasepIsProcessAllowed(), BasepMapFile(), BasepMoveFileDelayed(), BasepNotifyTrackingService(), BasepOpenFileForMove(), BasepSxsCloseHandles(), BaseSrvCleanupVDMResources(), BaseSrvCreatePairWaitHandles(), BaseSrvDestroyConsoleRecord(), BaseSrvDestroyPairWaitHandles(), BaseSrvIsVdmAllowed(), Beep(), CabinetExtractFile(), CallApphelpWithImage(), CallCacheControl(), CheckTokenMembership(), ClientThread(), CloseCabinet(), CloseDefaultKeys(), CloseDevice(), CloseHandle(), CloseIniBootLoaderStore(), closeTcpFile(), CmGetSystemDriverList(), CmInitSystem1(), CmpCreateControlSet(), CmpCreateHardwareProfile(), CmpInitializeHardwareConfiguration(), CmpInitializeMachineDependentConfiguration(), CmpInitializeRegistryNode(), CmpSetSystemValues(), CmpSetupConfigurationTree(), CmpSetVersionData(), CommandDumpSector(), CommandPartInfo(), ConCfgOpenUserSettings(), ConDrvUnpause(), ConnectConsole(), ConnectRegistry(), ConSrvDeleteConsole(), ConSrvInitConsole(), ConvertNtPathToWin32Path(), create_classes_root_hkey(), create_key(), create_registry_key(), CreateBaseAcls(), CreateContext(), CreateDirectoryExW(), CreateDirectoryW(), CreateHardLinkW(), CreateIoCompletionPort(), CreateKeyTest(), CreateNestedKey(), CreatePartitionList(), CreatePipe(), CreateProcessAsUserCommon(), CreateProcessInternalW(), CreateRegistryFile(), CreateSymLinkKey(), CreateWindowStationW(), CSR_API(), CsrApiPortInitialize(), CsrCreateRemoteThread(), CsrGetProcessLuid(), CsrpCheckRequestThreads(), CsrpConnectToServer(), CsrProcessRefcountZero(), CsrSbApiRequestThread(), CsrSetProcessSecurity(), CsrSrvCreateSharedSection(), CsrThreadRefcountZero(), DbgUiIssueRemoteBreakin(), DebugActiveProcess(), DebugActiveProcessStop(), DeleteFileW(), DeleteKeyTest(), DeleteSymLinkKey(), DeleteValueTest(), DestroyProtoHive(), DismountVolume(), do_enumeratekey(), DoesPathExist(), DumpRegistryData(), EnumerateKeyTest(), EnumerateValueTest(), ExpandSymbolicLink(), ExpCreateSystemRootLink(), ExpInitializeCallbacks(), Ext2CloseDevice(), FindClose(), FindFirstChangeNotificationW(), FindFirstFileExW(), FindFirstStreamW(), FindNTOSInstallations(), FormatEx2(), FreeConsole(), get_manifest_in_associated_manifest(), get_manifest_in_manifest_file(), get_manifest_in_pe_file(), get_registry_locale_info(), GetComputerIdentifier(), GetComputerNameFromRegistry(), GetCPFileNameFromRegistry(), GetDiskFreeSpaceExW(), GetDiskFreeSpaceW(), GetDisplayIdentifier(), GetDllList(), GetDosDevicesProtection(), GetDriveTypeW(), GetFileSecurityW(), GetFileSystem(), GetNTObjectSymbolicLinkTarget(), GetRegInt(), GetSocketInformation(), GetSourcePaths(), GetTempFileNameW(), GetTimeouts(), GetUserGeoID(), GetVolumeInformationW(), GetVolumeNameForRoot(), GRAPHICS_BUFFER_Destroy(), GRAPHICS_BUFFER_Initialize(), GuiApplyUserSettings(), GuiConsoleShowConsoleProperties(), GuiDeinitFrontEnd(), GuiInit(), GuiInitFrontEnd(), ImpersonateLoggedOnUser(), InfOpenFile(), InfWriteFile(), IniCacheLoad(), IniCacheSave(), InitFunctionPtrs(), InitializeFmIfsOnce(), InitializeUserModePnpManager(), InitLogPort(), InstallBtrfsBootCodeToDisk(), InstallDevice(), InstallDriver(), InstallFat12BootCodeToFloppy(), InstallFat16BootCode(), InstallFat16BootCodeToDisk(), InstallFat16BootCodeToFile(), InstallFat32BootCode(), InstallFat32BootCodeToDisk(), InstallFat32BootCodeToFile(), InstallMbrBootCodeToDiskHelper(), InstallSetupInfFile(), IntAllocConsole(), IntAttachConsole(), IntGetCodePageEntry(), IopCreateRootDirectories(), IopInitializePlugPlayServices(), IopMarkBootPartition(), is_mounted_multi_device(), IsAcpiComputer(), IsShimInfrastructureDisabled(), IsThereAValidBootSector(), IsThisARootDirectory(), IsValidLanguageGroup(), IsValidNTOSInstallation(), keyed_event_thread(), KsecOpenDevice(), LdrOpenImageFileOptionsKey(), LdrpCheckForKnownDll(), LdrpCheckForLoadedDll(), LdrpCreateDllSection(), LdrpInitializeProcess(), LdrpMapDll(), LdrQueryImageFileExecutionOptionsEx(), LdrVerifyImageMatchesChecksum(), ListDirectory(), LoadModule(), LogfBackupFile(), LogfClose(), LogfCreate(), lookup_assembly(), lookup_winsxs(), LsaConnectUntrusted(), LsapCheckLogonProcess(), LsapCloseDbObject(), LsapCloseLsaPort(), LsapCreateDatabaseKeys(), LsapCreateDbObject(), LsapDeleteDbObject(), LsapDeregisterLogonProcess(), LsapEnumLogonSessions(), LsapGetLogonSessionData(), LsapGetObjectAttribute(), LsapIsDatabaseInstalled(), LsapLogonUser(), LsapOpenDbObject(), LsapRegCloseKey(), LsapRegDeleteSubKey(), LsapSetObjectAttribute(), LsarSetSecurityObject(), main(), MoveFileWithProgressW(), MyDeleteFile(), NetUserChangePassword(), NLS_EnumLanguageGroupLocales(), NLS_EnumSystemCodePages(), NLS_EnumSystemLanguageGroups(), NlsInit(), NlsUninit(), NtQueryOpenSubKeys(), ObDuplicateObject(), ObInitSystem(), ObpCreateDosDevicesDirectory(), OpenAndMapFile(), OpenBootStore_UStr(), OpenFile(), OpenWindowStationW(), nt_handle::operator=(), parse_file(), Phase1InitializationDiscard(), PipGetDriverTagPriority(), PortThreadRoutine(), PrintProcess(), PrintThreads(), PrivMoveFileIdentityW(), ProcessDisplayRegistry(), ProcessIdToSessionId(), ProcessLocaleRegistry(), QueryDosDeviceW(), ReadBlock(), RegCleanupRegistry(), RegCloseKey(), RegCopyTreeW(), RegDeleteKeyExW(), RegDeleteKeyValueW(), RegInitializeRegistry(), RegisterUncProvider(), registry_callback(), RegOverridePredefKey(), RegpCopyTree(), RegReplaceKeyW(), RegRestoreKeyW(), RegSaveKeyW(), RegSetKeyValueA(), RegSetKeyValueW(), RemoveDirectoryW(), ReplaceFileW(), ResolveArcNameNtSymLink(), RSetServiceObjectSecurity(), RtlCreateActivationContext(), RtlCreateTimerQueue(), RtlCreateUserSecurityObject(), RtlCreateUserThread(), RtlDefaultNpAcl(), RtlDeleteCriticalSection(), RtlDeleteResource(), RtlDeleteTimer(), RtlDeleteTimerQueueEx(), RtlDeregisterWaitEx(), RtlImpersonateSelf(), RtlInitializeRXact(), RtlNewSecurityGrantedAccess(), RtlpCloseKeyedEvent(), RtlpExecuteIoWorkItem(), RtlpExecuteWorkItem(), RtlpIoWorkerThreadProc(), RtlpIsIoPending(), RtlpStartWorkerThread(), RtlQueryRegistryValues(), RtlQueueWorkItem(), RtlRegisterWait(), RtlReleaseRelativeName(), RtlSetCurrentDirectory_U(), RXactpCommit(), SampRegCloseKey(), SampRegDeleteKey(), SamrSetSecurityObject(), SaveBootSector(), ScmCheckDriver(), ScmConvertToBootPathName(), ScmGetDriverStatus(), SdbCloseDatabase(), SdbDeletePermLayerKeys(), SdbpCloseMemMappedFile(), SdbpGetPermLayersInternal(), SdbpOpenMemMappedFile(), SdbSetPermLayerKeys(), ServerThread(), SetActiveComputerNameToRegistry(), SetComputerNameToRegistry(), SetDefaultPagefile(), SetFileAttributesW(), SetFileSecurityW(), SetGeoID(), SetLocaleInfoW(), SetMountedDeviceValue(), SetRegistryValue(), SetRosSpecificInfo(), SetSocketInformation(), SetupCopyFile(), SetupCreateSingleDirectory(), SetupDeleteFile(), SetupMoveFile(), SetUserGeoID(), SetValueTest1(), SetValueTest2(), SetVolumeLabelW(), SmExecPgm(), SmLookupSubsystem(), SmpAcquirePrivilege(), SmpConfigureObjectDirectories(), SmpCreateDynamicEnvironmentVariables(), SmpCreateVolumeDescriptors(), SmpDeletePagingFile(), SmpDereferenceSubsystem(), SmpExecPgm(), SmpExecuteImage(), SmpExecuteInitialCommand(), SmpGetPagingFileSize(), SmpGetVolumeFreeSpace(), SmpHandleConnectionRequest(), SmpInit(), SmpInitializeDosDevices(), SmpInitializeKnownDllsInternal(), SmpLoadDataFromRegistry(), SmpLoadSubSystem(), SmpProcessFileRenames(), SmpQueryRegistrySosOption(), SmpReleasePrivilege(), SmpSbCreateSession(), SmpTranslateSystemPartitionInformation(), SockCreateOrReferenceAsyncThread(), SpeakerCleanup(), START_TEST(), StartAuthenticationPort(), TerminateUserModePnpManager(), test1(), test2(), test3(), test5(), test6(), test7(), test9(), Test_ApphelpCheckRunApp(), Test_EmptyFile(), Test_ImageSection(), test_keyed_events(), Test_KeyFullInformation(), Test_KeyNameInformation(), test_mutant(), test_NtOpenKey(), Test_PageFileSection(), Test_recv(), Test_SectionContents(), test_tp_multi_wait(), TestCreateOpen_(), TestSend(), TestSendTo(), TH32CreateSnapshotSectionInitialize(), timer_queue_thread_proc(), UnhandledExceptionFilter(), UnMapFile(), UserpFormatMessages(), VfatFormat(), VfatxFormat(), Wait_thread_proc(), WaitNamedPipeW(), WinExec(), WritePartitions(), WSHIoctl_GetInterfaceList(), WSPAccept(), WSPBind(), WSPCloseSocket(), WSPConnect(), WSPDuplicateSocket(), WSPEnumNetworkEvents(), WSPEventSelect(), WSPGetPeerName(), WSPGetSockName(), WSPListen(), WSPRecv(), WSPRecvFrom(), WSPSelect(), WSPSend(), WSPSendTo(), WSPShutdown(), WSPSocket(), CEnumNTDirectory::~CEnumNTDirectory(), and nt_handle::~nt_handle().

NtDuplicateObject()

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
	)

Definition at line 3407 of file obhandle.c.

{
    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;
}

Referenced by BaseSrvCreatePairWaitHandles(), BaseSrvDestroyPairWaitHandles(), ConSrvAllocateConsole(), ConSrvInheritConsole(), CSR_API(), CsrCreateRemoteThread(), DuplicateHandle(), GRAPHICS_BUFFER_Destroy(), GRAPHICS_BUFFER_Initialize(), GuiApplyUserSettings(), GuiConsoleShowConsoleProperties(), GuiInit(), LsapLogonUser(), RtlpIoWorkerThreadProc(), RtlpIsIoPending(), SmpExecPgm(), SmpExecuteInitialCommand(), SmpLoadSubSystem(), SmpSbCreateSession(), START_TEST(), and StuffStdHandle().

ObClearProcessHandleTable()

VOID NTAPI ObClearProcessHandleTable

(

IN PEPROCESS

Process

)

Definition at line 2024 of file obhandle.c.

{
    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);
}

Referenced by NtTerminateProcess(), and PspTerminateProcess().

ObCloseHandle()

NTSTATUS NTAPI ObCloseHandle	(	IN HANDLE	Handle,
		IN KPROCESSOR_MODE	AccessMode
	)

Definition at line 3376 of file obhandle.c.

{
    /* Call the internal API */
    return ObpCloseHandle(Handle, AccessMode);
}

Referenced by _IRQL_requires_max_(), CheckDirectorySecurity__(), CheckKeySecurity__(), CmpAddToHiveFileList(), CmpLinkKeyToHive(), CmpRemoveFromHiveFileList(), DbgkCreateThread(), DbgkMapViewOfSection(), DbgkpFreeDebugEvent(), DbgkpOpenHandles(), DbgkpPostFakeModuleMessages(), DbgkpPostFakeThreadMessages(), DisplayBootBitmap(), ExitThreadCallback(), ExpCreateSystemRootLink(), ExpCreateWorkerThread(), ExpInitializeWorkerThreads(), ExpInitNls(), InitThreadCallback(), IntCopyRegistryKey(), IntCreateDesktop(), IntCreateNewRegistryPath(), IntResolveDesktop(), IntSetupDeviceSettingsKey(), IoCreateController(), IoCreateDevice(), IoCreateStreamFileObjectEx(), IopDetectResourceConflict(), IopOpenLinkOrRenameTarget(), IopReassignSystemRoot(), IopStoreSystemPartitionInformation(), KernelModeTest(), KmtStartThread(), LpcpCreatePort(), MmCreatePhysicalMemorySection(), NotificationCallback(), NtLoadKeyEx(), NtSaveKeyEx(), NtSaveMergedKeys(), NtSecureConnectPort(), NtSetDefaultLocale(), NtSetInformationFile(), NtUnloadKey2(), NtUserCloseDesktop(), NtUserCloseWindowStation(), NtUserResolveDesktop(), PnpRootCreateDevice(), PspCreateProcess(), PspCreateThread(), PspExitThread(), PspInitPhase0(), RawInputThreadMain(), RunTest(), SepRmCommandServerThread(), SepRmCommandServerThreadInit(), SeRmInitPhase1(), START_TEST(), TestAllInformation(), TestConnect(), TestCreateNamedPipe(), TestDuplicate(), TestIoCreateFile(), TestObRootSecurity(), TestPhysicalMemorySection(), TestReadWrite(), TestRelativeNames(), TestSharedCacheMap(), UserModeTest(), UserSetProcessWindowStation(), and xHalIoAssignDriveLetters().

ObDereferenceProcessHandleTable()

VOID NTAPI ObDereferenceProcessHandleTable

(

IN PEPROCESS

Process

)

Definition at line 51 of file obhandle.c.

{
    /* Release the process lock */
    ExReleaseRundownProtection(&Process->RundownProtect);
}

Referenced by ObClearProcessHandleTable(), ObDuplicateObject(), ObFindHandleForObject(), ObGetProcessHandleCount(), and ObInitProcess().

ObDuplicateObject()

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
	)

Definition at line 2201 of file obhandle.c.

{
    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;
    }

    if (NewHandleEntry.ObAttributes & OBJ_PROTECT_CLOSE)
    {
        NewHandleEntry.ObAttributes &= ~OBJ_PROTECT_CLOSE;
        NewHandleEntry.GrantedAccess |= ObpAccessProtectCloseBit;
    }

    /* 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;
}

Referenced by DbgkpOpenHandles(), and NtDuplicateObject().

ObFindHandleForObject()

BOOLEAN NTAPI ObFindHandleForObject	(	IN PEPROCESS	Process,
		IN PVOID	Object,
		IN POBJECT_TYPE	ObjectType,
		IN POBJECT_HANDLE_INFORMATION	HandleInformation,
		OUT PHANDLE	Handle
	)

Definition at line 2853 of file obhandle.c.

{
    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;
}

Referenced by IntGetDesktopObjectHandle(), and IntResolveDesktop().

ObGetProcessHandleCount()

ULONG NTAPI ObGetProcessHandleCount

(

IN PEPROCESS

Process

)

Definition at line 59 of file obhandle.c.

{
    ULONG HandleCount;
    PHANDLE_TABLE HandleTable;

    ASSERT(Process);

    /* Ensure the handle table doesn't go away while we use it */
    HandleTable = ObReferenceProcessHandleTable(Process);

    if (HandleTable != NULL)
    {
        /* Count the number of handles the process has */
        HandleCount = HandleTable->HandleCount;

        /* Let the handle table go */
        ObDereferenceProcessHandleTable(Process);
    }
    else
    {
        /* No handle table, no handles */
        HandleCount = 0;
    }

    return HandleCount;
}

Referenced by NtQueryInformationProcess(), and QSI_DEF().

ObInitProcess()

NTSTATUS NTAPI ObInitProcess	(	IN PEPROCESS Parent	OPTIONAL,
		IN PEPROCESS	Process
	)

Definition at line 2087 of file obhandle.c.

{
    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;
    }
}

Referenced by PspCreateProcess().

ObInsertObject()

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
	)

Definition at line 2932 of file obhandle.c.

{
    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;
}

Referenced by _IRQL_requires_max_(), CmpCreateRegistryRoot(), CreateClientPort(), ExCreateCallback(), HalpDmaAllocateChildAdapter(), IntCreateWindowStation(), IoCreateController(), IoCreateDevice(), IoCreateStreamFileObjectEx(), IopCreateDriver(), LpcpCreatePort(), MmCreatePhysicalMemorySection(), NtCreateDebugObject(), NtCreateDirectoryObject(), NtCreateEvent(), NtCreateEventPair(), NtCreateIoCompletion(), NtCreateJobObject(), NtCreateMutant(), NtCreateProfile(), NtCreateSection(), NtCreateSemaphore(), NtCreateSymbolicLinkObject(), NtCreateTimer(), NtDuplicateToken(), NtOpenThreadTokenEx(), NtSecureConnectPort(), ObtCreateObjects(), PspCreateProcess(), PspCreateThread(), SepCreateToken(), SepInitializationPhase1(), and SeSubProcessToken().

ObIsKernelHandle()

BOOLEAN NTAPI ObIsKernelHandle

(

IN HANDLE

Handle

)

Definition at line 3522 of file obhandle.c.

{
    /* Use the inlined version. We know we are in kernel mode. */
    return ObpIsKernelHandle(Handle, KernelMode);
}

ObKillProcess()

VOID NTAPI ObKillProcess

(

IN PEPROCESS

Process

)

Definition at line 2157 of file obhandle.c.

{
    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);
}

Referenced by PspDeleteProcess(), and PspExitThread().

ObOpenObjectByName()

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
	)

Definition at line 2529 of file obhandle.c.

{
    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;
}

Referenced by CmLoadKey(), CmpLinkHiveToMaster(), CreateGreenFdo(), ExCreateCallback(), GetObjectType(), IntCreateDesktop(), IntCreateWindowStation(), IntResolveDesktop(), IoFastQueryNetworkAttributes(), IopCreateFile(), IopQueryAttributesFile(), NtCreateKey(), NtDeleteFile(), NtOpenDirectoryObject(), NtOpenEvent(), NtOpenEventPair(), NtOpenIoCompletion(), NtOpenJobObject(), NtOpenKey(), NtOpenMutant(), NtOpenProcess(), NtOpenSection(), NtOpenSemaphore(), NtOpenSymbolicLinkObject(), NtOpenThread(), NtOpenTimer(), NtQueryOpenSubKeys(), NtUnloadKey2(), NtUserOpenDesktop(), NtUserOpenWindowStation(), ObtCreateObjectTypes(), and START_TEST().

ObOpenObjectByPointer()

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
	)

Definition at line 2739 of file obhandle.c.

{
    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;
}

Referenced by AfdBindSocket(), CmpConvertHandleToKernelHandle(), DbgkOpenProcessDebugPort(), DbgkpOpenHandles(), IntGetDesktopObjectHandle(), IntResolveDesktop(), NtOpenProcess(), NtOpenProcessTokenEx(), NtOpenThread(), NtOpenThreadTokenEx(), RawInputThreadMain(), SerenumDetectLegacyDevice(), SerenumDetectPnpDevice(), SermouseDetectLegacyDevice(), START_TEST(), UserOpenInputDesktop(), and WmipOpenGuidObject().

ObpChargeQuotaForObject()

NTSTATUS NTAPI ObpChargeQuotaForObject	(	IN POBJECT_HEADER	ObjectHeader,
		IN POBJECT_TYPE	ObjectType,
		OUT PBOOLEAN	NewObject
	)

Definition at line 434 of file obhandle.c.

{
    POBJECT_HEADER_QUOTA_INFO ObjectQuota;
    ULONG PagedPoolCharge, NonPagedPoolCharge;

    /* Get quota information */
    ObjectQuota = OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader);
    *NewObject = FALSE;

    /* Check if this is a new object */
    if (ObjectHeader->Flags & OB_FLAG_CREATE_INFO)
    {
        /* Remove the flag */
        ObjectHeader->Flags &= ~ OB_FLAG_CREATE_INFO;
        if (ObjectQuota)
        {
            /* We have a quota, get the charges */
            PagedPoolCharge = ObjectQuota->PagedPoolCharge;
            NonPagedPoolCharge = ObjectQuota->NonPagedPoolCharge;
        }
        else
        {
            /* Get it from the object type */
            PagedPoolCharge = ObjectType->TypeInfo.DefaultPagedPoolCharge;
            NonPagedPoolCharge = ObjectType->TypeInfo.DefaultNonPagedPoolCharge;
        }

        /* Charge the quota */
        ObjectHeader->QuotaBlockCharged = (PVOID)1;
        DPRINT("FIXME: Should charge: %lx %lx\n", PagedPoolCharge, NonPagedPoolCharge);
#if 0
            PsChargeSharedPoolQuota(PsGetCurrentProcess(),
                                    PagedPoolCharge,
                                    NonPagedPoolCharge);
#endif

        /* Check if we don't have a quota block */
        if (!ObjectHeader->QuotaBlockCharged) return STATUS_QUOTA_EXCEEDED;

        /* Now set the flag */
        *NewObject = TRUE;
    }

    /* Return success */
    return STATUS_SUCCESS;
}

Referenced by ObInsertObject(), ObpIncrementHandleCount(), and ObpIncrementUnnamedHandleCount().

ObpCloseHandle()

NTSTATUS NTAPI ObpCloseHandle	(	IN HANDLE	Handle,
		IN KPROCESSOR_MODE	AccessMode
	)

Definition at line 1727 of file obhandle.c.

{
    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;
}

Referenced by NtClose(), and ObCloseHandle().

ObpCloseHandleCallback()

BOOLEAN NTAPI ObpCloseHandleCallback	(	IN PHANDLE_TABLE_ENTRY	HandleTableEntry,
		IN HANDLE	Handle,
		IN PVOID	Context
	)

Definition at line 1921 of file obhandle.c.

{
    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;
}

Referenced by ObClearProcessHandleTable(), and ObKillProcess().

ObpCloseHandleTableEntry()

NTSTATUS NTAPI ObpCloseHandleTableEntry	(	IN PHANDLE_TABLE	HandleTable,
		IN PHANDLE_TABLE_ENTRY	HandleEntry,
		IN HANDLE	Handle,
		IN KPROCESSOR_MODE	AccessMode,
		IN BOOLEAN	IgnoreHandleProtection
	)

Definition at line 682 of file obhandle.c.

{
    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;
}

Referenced by ObpCloseHandle(), and ObpCloseHandleCallback().

ObpCreateHandle()

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
	)

Definition at line 1494 of file obhandle.c.

{
    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;
}

Referenced by ObInsertObject(), ObOpenObjectByName(), and ObOpenObjectByPointer().

ObpCreateUnnamedHandle()

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
	)

Definition at line 1309 of file obhandle.c.

{
    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;
}

Referenced by ObInsertObject().

ObpDecrementHandleCount()

VOID NTAPI ObpDecrementHandleCount	(	IN PVOID	ObjectBody,
		IN PEPROCESS	Process,
		IN ACCESS_MASK	GrantedAccess,
		IN POBJECT_TYPE	ObjectType
	)

Definition at line 527 of file obhandle.c.

{
    POBJECT_HEADER ObjectHeader;
    LONG SystemHandleCount, ProcessHandleCount;
    LONG NewCount;
    KIRQL CalloutIrql;
    POBJECT_HEADER_HANDLE_INFO HandleInfo;
    POBJECT_HANDLE_COUNT_ENTRY HandleEntry;
    POBJECT_HANDLE_COUNT_DATABASE HandleDatabase;
    ULONG i;
    PAGED_CODE();

    /* Get the object type and header */
    ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
    OBTRACE(OB_HANDLE_DEBUG,
            "%s - Decrementing count for: %p. HC PC %lx %lx\n",
            __FUNCTION__,
            ObjectBody,
            ObjectHeader->HandleCount,
            ObjectHeader->PointerCount);

    /* Lock the object */
    ObpAcquireObjectLock(ObjectHeader);

    /* Set default counts */
    SystemHandleCount = ObjectHeader->HandleCount;
    ProcessHandleCount = 0;

    /* Decrement the handle count */
    NewCount = InterlockedDecrementSizeT(&ObjectHeader->HandleCount);

    /* Check if we're out of handles and this was an exclusive object */
    if (!(NewCount) && (ObjectHeader->Flags & OB_FLAG_EXCLUSIVE))
    {
        /* Clear the exclusive flag */
        OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader)->ExclusiveProcess = NULL;
    }

    /* Is the object type keeping track of handles? */
    if (ObjectType->TypeInfo.MaintainHandleCount)
    {
        /* Get handle information */
        HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);

        /* 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);
}

Referenced by ObDuplicateObject(), ObpCloseHandleTableEntry(), ObpCreateHandle(), and ObpCreateUnnamedHandle().

ObpDuplicateHandleCallback()

BOOLEAN NTAPI ObpDuplicateHandleCallback	(	IN PEPROCESS	Process,
		IN PHANDLE_TABLE	HandleTable,
		IN PHANDLE_TABLE_ENTRY	OldEntry,
		IN PHANDLE_TABLE_ENTRY	HandleTableEntry
	)

Definition at line 1957 of file obhandle.c.

{
    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;
}

Referenced by ObInitProcess().

ObpEnumFindHandleProcedure()

BOOLEAN NTAPI ObpEnumFindHandleProcedure	(	IN PHANDLE_TABLE_ENTRY	HandleEntry,
		IN HANDLE	Handle,
		IN PVOID	Context
	)

Definition at line 214 of file obhandle.c.

{
    POBJECT_HEADER ObjectHeader;
    ACCESS_MASK GrantedAccess;
    ULONG HandleAttributes;
    POBP_FIND_HANDLE_DATA FindData = Context;

    /* Get the object header */
    ObjectHeader = ObpGetHandleObject(HandleEntry);

    /* Make sure it's valid and matching */
    if ((FindData->ObjectHeader) && (FindData->ObjectHeader != ObjectHeader))
    {
        /* No match, fail */
        return FALSE;
    }

    /* Now attempt to match the object type */
    if ((FindData->ObjectType) && (FindData->ObjectType != ObjectHeader->Type))
    {
        /* No match, fail */
        return FALSE;
    }

    /* Check if we have extra information */
    if (FindData->HandleInformation)
    {
        /* Get the granted access and attributes */
        GrantedAccess = HandleEntry->GrantedAccess;
        HandleAttributes = HandleEntry->ObAttributes & OBJ_HANDLE_ATTRIBUTES;

        /* Attempt to match them */
        if ((FindData->HandleInformation->HandleAttributes != HandleAttributes) ||
            (FindData->HandleInformation->GrantedAccess != GrantedAccess))
        {
            /* No match, fail */
            return FALSE;
        }
    }

    /* We have a match */
    return TRUE;
}

Referenced by ObFindHandleForObject().

ObpIncrementHandleCount()

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
	)

Definition at line 808 of file obhandle.c.

{
    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;
}

Referenced by ObDuplicateObject(), ObpCreateHandle(), and ObpDuplicateHandleCallback().

ObpIncrementHandleDataBase()

NTSTATUS NTAPI ObpIncrementHandleDataBase	(	IN POBJECT_HEADER	ObjectHeader,
		IN PEPROCESS	Process,
		IN OUT PULONG	NewProcessHandleCount
	)

Definition at line 336 of file obhandle.c.

{
    POBJECT_HEADER_HANDLE_INFO HandleInfo;
    POBJECT_HANDLE_COUNT_ENTRY HandleEntry, FreeEntry = NULL;
    POBJECT_HANDLE_COUNT_DATABASE HandleDatabase;
    ULONG i;
    PAGED_CODE();

    /* Get the handle info and check if we only have one entry */
    HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);
    if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
    {
        /* Check if the entry is free */
        if (!HandleInfo->SingleEntry.HandleCount)
        {
            /* Add ours */
            HandleInfo->SingleEntry.HandleCount = 1;
            HandleInfo->SingleEntry.Process = Process;

            /* Return success and 1 handle */
            *NewProcessHandleCount = 1;
            return STATUS_SUCCESS;
        }
        else if (HandleInfo->SingleEntry.Process == Process)
        {
            /* Busy entry, but same process */
            *NewProcessHandleCount = ++HandleInfo->SingleEntry.HandleCount;
            return STATUS_SUCCESS;
        }
        else
        {
            /* Insert a new entry */
            FreeEntry = ObpInsertHandleCount(ObjectHeader);
            if (!FreeEntry) return STATUS_INSUFFICIENT_RESOURCES;
            ASSERT(!FreeEntry->Process);
            ASSERT(!FreeEntry->HandleCount);

            /* Fill it out */
            FreeEntry->Process = Process;
            FreeEntry->HandleCount = 1;

            /* Return success and 1 handle */
            *NewProcessHandleCount = 1;
            return STATUS_SUCCESS;
        }
    }

    /* We have a database instead */
    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->Process == Process)
            {
                /* Found it, get the process handle count */
                *NewProcessHandleCount = ++HandleEntry->HandleCount;
                return STATUS_SUCCESS;
            }
            else if (!HandleEntry->HandleCount)
            {
                /* Found a free entry */
                FreeEntry = HandleEntry;
            }

            /* Keep looping */
            HandleEntry++;
            i--;
        }

        /* Check if we couldn't find a free entry */
        if (!FreeEntry)
        {
            /* Allocate one */
            FreeEntry = ObpInsertHandleCount(ObjectHeader);
            if (!FreeEntry) return STATUS_INSUFFICIENT_RESOURCES;
            ASSERT(!FreeEntry->Process);
            ASSERT(!FreeEntry->HandleCount);
        }

        /* Fill out the entry */
        FreeEntry->Process = Process;
        FreeEntry->HandleCount = 1;
        *NewProcessHandleCount = 1;
    }

    /* Return success if we got here */
    return STATUS_SUCCESS;
}

Referenced by ObpIncrementHandleCount(), and ObpIncrementUnnamedHandleCount().

ObpIncrementUnnamedHandleCount()

NTSTATUS NTAPI ObpIncrementUnnamedHandleCount	(	IN PVOID	Object,
		IN PACCESS_MASK	DesiredAccess,
		IN KPROCESSOR_MODE	AccessMode,
		IN ULONG	HandleAttributes,
		IN PEPROCESS	Process
	)

Definition at line 1087 of file obhandle.c.

{
    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;
}

Referenced by ObpCreateUnnamedHandle().

ObpInsertHandleCount()

POBJECT_HANDLE_COUNT_ENTRY NTAPI ObpInsertHandleCount

(

IN POBJECT_HEADER

ObjectHeader

)

Definition at line 262 of file obhandle.c.

{
    POBJECT_HEADER_HANDLE_INFO HandleInfo;
    POBJECT_HANDLE_COUNT_ENTRY FreeEntry;
    POBJECT_HANDLE_COUNT_DATABASE HandleDatabase, OldHandleDatabase;
    ULONG i;
    ULONG Size, OldSize;
    OBJECT_HANDLE_COUNT_DATABASE SingleDatabase;
    PAGED_CODE();

    /* Get the handle info */
    HandleInfo = OBJECT_HEADER_TO_HANDLE_INFO(ObjectHeader);
    if (!HandleInfo) return NULL;

    /* Check if we only have one entry */
    if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
    {
        /* Fill out the single entry */
        SingleDatabase.CountEntries = 1;
        SingleDatabase.HandleCountEntries[0] = HandleInfo->SingleEntry;

        /* Use this as the old size */
        OldHandleDatabase = &SingleDatabase;
        OldSize = sizeof(SingleDatabase);

        /* Now we'll have two entries, and an entire DB */
        i = 2;
        Size = sizeof(OBJECT_HANDLE_COUNT_DATABASE) +
               ((i - 1) * sizeof(OBJECT_HANDLE_COUNT_ENTRY));
    }
    else
    {
        /* We already have a DB, get the information from it */
        OldHandleDatabase = HandleInfo->HandleCountDatabase;
        i = OldHandleDatabase->CountEntries;
        OldSize = sizeof(OBJECT_HANDLE_COUNT_DATABASE) +
                  ((i - 1) * sizeof(OBJECT_HANDLE_COUNT_ENTRY));

        /* Add 4 more entries */
        i += 4;
        Size = OldSize + (4 * sizeof(OBJECT_HANDLE_COUNT_ENTRY));
    }

    /* Allocate the DB */
    HandleDatabase = ExAllocatePoolWithTag(PagedPool, Size, TAG_OB_HANDLE);
    if (!HandleDatabase) return NULL;

    /* Copy the old database */
    RtlCopyMemory(HandleDatabase, OldHandleDatabase, OldSize);

    /* Check if we he had a single entry before */
    if (ObjectHeader->Flags & OB_FLAG_SINGLE_PROCESS)
    {
        /* Now we have more */
        ObjectHeader->Flags &= ~OB_FLAG_SINGLE_PROCESS;
    }
    else
    {
        /* Otherwise we had a DB, free it */
        ExFreePoolWithTag(OldHandleDatabase, TAG_OB_HANDLE);
    }

    /* Find the end of the copy and zero out the new data */
    FreeEntry = (PVOID)((ULONG_PTR)HandleDatabase + OldSize);
    RtlZeroMemory(FreeEntry, Size - OldSize);

    /* Set the new information and return the free entry */
    HandleDatabase->CountEntries = i;
    HandleInfo->HandleCountDatabase = HandleDatabase;
    return FreeEntry;
}

Referenced by ObpIncrementHandleDataBase().

ObpReferenceProcessObjectByHandle()

NTSTATUS NTAPI ObpReferenceProcessObjectByHandle	(	IN HANDLE	Handle,
		IN PEPROCESS	Process,
		IN PHANDLE_TABLE	HandleTable,
		IN KPROCESSOR_MODE	AccessMode,
		OUT PVOID *	Object,
		OUT POBJECT_HANDLE_INFORMATION	HandleInformation,
		OUT PACCESS_MASK	AuditMask
	)

Definition at line