+++ /dev/null
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS Win32k subsystem
- * PURPOSE: Window stations
- * FILE: win32ss/user/ntuser/winsta.c
- * PROGRAMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
- * TODO: The process window station is created on
- * the first USER32/GDI32 call not related
- * to window station/desktop handling
- */
-
-#include <win32k.h>
-DBG_DEFAULT_CHANNEL(UserWinsta);
-
-/* GLOBALS *******************************************************************/
-
-/* Currently active window station */
-PWINSTATION_OBJECT InputWindowStation = NULL;
-
-/* Winlogon SAS window */
-HWND hwndSAS = NULL;
-
-/* Full path to WindowStations directory */
-UNICODE_STRING gustrWindowStationsDir;
-
-/* INITIALIZATION FUNCTIONS ****************************************************/
-
-INIT_FUNCTION
-NTSTATUS
-NTAPI
-InitWindowStationImpl(VOID)
-{
- GENERIC_MAPPING IntWindowStationMapping = { WINSTA_READ,
- WINSTA_WRITE,
- WINSTA_EXECUTE,
- WINSTA_ACCESS_ALL};
-
- /* Set Winsta Object Attributes */
- ExWindowStationObjectType->TypeInfo.DefaultNonPagedPoolCharge = sizeof(WINSTATION_OBJECT);
- ExWindowStationObjectType->TypeInfo.GenericMapping = IntWindowStationMapping;
- ExWindowStationObjectType->TypeInfo.ValidAccessMask = WINSTA_ACCESS_ALL;
-
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-UserCreateWinstaDirectory(VOID)
-{
- PPEB Peb;
- NTSTATUS Status;
- WCHAR wstrWindowStationsDir[MAX_PATH];
- OBJECT_ATTRIBUTES ObjectAttributes;
- HANDLE hWinstaDir;
-
- /* Create the WindowStations directory and cache its path for later use */
- Peb = NtCurrentPeb();
- if(Peb->SessionId == 0)
- {
- if (!RtlCreateUnicodeString(&gustrWindowStationsDir, WINSTA_OBJ_DIR))
- {
- return STATUS_INSUFFICIENT_RESOURCES;
- }
- }
- else
- {
- swprintf(wstrWindowStationsDir,
- L"%ws\\%lu%ws",
- SESSION_DIR,
- Peb->SessionId,
- WINSTA_OBJ_DIR);
-
- if (!RtlCreateUnicodeString(&gustrWindowStationsDir, wstrWindowStationsDir))
- {
- return STATUS_INSUFFICIENT_RESOURCES;
- }
- }
-
- InitializeObjectAttributes(&ObjectAttributes,
- &gustrWindowStationsDir,
- 0,
- NULL,
- NULL);
- Status = ZwCreateDirectoryObject(&hWinstaDir, 0, &ObjectAttributes);
- if (!NT_SUCCESS(Status))
- {
- ERR("Could not create %wZ directory (Status 0x%X)\n", &gustrWindowStationsDir, Status);
- return Status;
- }
-
- TRACE("Created directory %wZ for session %lu\n", &gustrWindowStationsDir, Peb->SessionId);
-
- return Status;
-}
-
-/* OBJECT CALLBACKS **********************************************************/
-
-NTSTATUS
-APIENTRY
-IntWinStaObjectDelete(
- _In_ PVOID Parameters)
-{
- PWIN32_DELETEMETHOD_PARAMETERS DeleteParameters = Parameters;
- PWINSTATION_OBJECT WinSta = (PWINSTATION_OBJECT)DeleteParameters->Object;
-
- TRACE("Deleting window station (0x%p)\n", WinSta);
-
- WinSta->Flags |= WSS_DYING;
-
- UserEmptyClipboardData(WinSta);
-
- RtlDestroyAtomTable(WinSta->AtomTable);
-
- RtlFreeUnicodeString(&WinSta->Name);
-
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-APIENTRY
-IntWinStaObjectParse(
- _In_ PVOID Parameters)
-{
- PWIN32_PARSEMETHOD_PARAMETERS ParseParameters = Parameters;
- PUNICODE_STRING RemainingName = ParseParameters->RemainingName;
-
- /* Assume we don't find anything */
- *ParseParameters->Object = NULL;
-
- /* Check for an empty name */
- if (!RemainingName->Length)
- {
- /* Make sure this is a window station, can't parse a desktop now */
- if (ParseParameters->ObjectType != ExWindowStationObjectType)
- {
- /* Fail */
- return STATUS_OBJECT_TYPE_MISMATCH;
- }
-
- /* Reference the window station and return */
- ObReferenceObject(ParseParameters->ParseObject);
- *ParseParameters->Object = ParseParameters->ParseObject;
- return STATUS_SUCCESS;
- }
-
- /* Check for leading slash */
- if (RemainingName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR)
- {
- /* Skip it */
- RemainingName->Buffer++;
- RemainingName->Length -= sizeof(WCHAR);
- RemainingName->MaximumLength -= sizeof(WCHAR);
- }
-
- /* Check if there is still a slash */
- if (wcschr(RemainingName->Buffer, OBJ_NAME_PATH_SEPARATOR))
- {
- /* In this case, fail */
- return STATUS_OBJECT_PATH_INVALID;
- }
-
- /*
- * Check if we are parsing a desktop.
- */
- if (ParseParameters->ObjectType == ExDesktopObjectType)
- {
- /* Then call the desktop parse routine */
- return IntDesktopObjectParse(ParseParameters->ParseObject,
- ParseParameters->ObjectType,
- ParseParameters->AccessState,
- ParseParameters->AccessMode,
- ParseParameters->Attributes,
- ParseParameters->CompleteName,
- RemainingName,
- ParseParameters->Context,
- ParseParameters->SecurityQos,
- ParseParameters->Object);
- }
-
- /* Should hopefully never get here */
- return STATUS_OBJECT_TYPE_MISMATCH;
-}
-
-NTSTATUS
-NTAPI
-IntWinstaOkToClose(
- _In_ PVOID Parameters)
-{
- PWIN32_OKAYTOCLOSEMETHOD_PARAMETERS OkToCloseParameters = Parameters;
- PPROCESSINFO ppi;
-
- ppi = PsGetCurrentProcessWin32Process();
-
- if(ppi && (OkToCloseParameters->Handle == ppi->hwinsta))
- {
- return STATUS_ACCESS_DENIED;
- }
-
- return STATUS_SUCCESS;
-}
-
-/* PRIVATE FUNCTIONS **********************************************************/
-
-/*
- * IntValidateWindowStationHandle
- *
- * Validates the window station handle.
- *
- * Remarks
- * If the function succeeds, the handle remains referenced. If the
- * fucntion fails, last error is set.
- */
-
-NTSTATUS FASTCALL
-IntValidateWindowStationHandle(
- HWINSTA WindowStation,
- KPROCESSOR_MODE AccessMode,
- ACCESS_MASK DesiredAccess,
- PWINSTATION_OBJECT *Object,
- POBJECT_HANDLE_INFORMATION pObjectHandleInfo)
-{
- NTSTATUS Status;
-
- if (WindowStation == NULL)
- {
- ERR("Invalid window station handle\n");
- EngSetLastError(ERROR_INVALID_HANDLE);
- return STATUS_INVALID_HANDLE;
- }
-
- Status = ObReferenceObjectByHandle(WindowStation,
- DesiredAccess,
- ExWindowStationObjectType,
- AccessMode,
- (PVOID*)Object,
- pObjectHandleInfo);
-
- if (!NT_SUCCESS(Status))
- SetLastNtError(Status);
-
- return Status;
-}
-
-BOOL FASTCALL
-co_IntInitializeDesktopGraphics(VOID)
-{
- TEXTMETRICW tmw;
- UNICODE_STRING DriverName = RTL_CONSTANT_STRING(L"DISPLAY");
- PDESKTOP pdesk;
-
- ScreenDeviceContext = IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
- if (NULL == ScreenDeviceContext)
- {
- IntDestroyPrimarySurface();
- return FALSE;
- }
- GreSetDCOwner(ScreenDeviceContext, GDI_OBJ_HMGR_PUBLIC);
-
- if (! IntCreatePrimarySurface())
- {
- return FALSE;
- }
-
- hSystemBM = NtGdiCreateCompatibleDC(ScreenDeviceContext);
-
- NtGdiSelectFont(hSystemBM, NtGdiGetStockObject(SYSTEM_FONT));
- GreSetDCOwner(hSystemBM, GDI_OBJ_HMGR_PUBLIC);
-
- /* Update the SERVERINFO */
- gpsi->aiSysMet[SM_CXSCREEN] = gppdevPrimary->gdiinfo.ulHorzRes;
- gpsi->aiSysMet[SM_CYSCREEN] = gppdevPrimary->gdiinfo.ulVertRes;
- gpsi->Planes = NtGdiGetDeviceCaps(ScreenDeviceContext, PLANES);
- gpsi->BitsPixel = NtGdiGetDeviceCaps(ScreenDeviceContext, BITSPIXEL);
- gpsi->BitCount = gpsi->Planes * gpsi->BitsPixel;
- gpsi->dmLogPixels = NtGdiGetDeviceCaps(ScreenDeviceContext, LOGPIXELSY);
- if (NtGdiGetDeviceCaps(ScreenDeviceContext, RASTERCAPS) & RC_PALETTE)
- {
- gpsi->PUSIFlags |= PUSIF_PALETTEDISPLAY;
- }
- else
- gpsi->PUSIFlags &= ~PUSIF_PALETTEDISPLAY;
- // Font is realized and this dc was previously set to internal DC_ATTR.
- gpsi->cxSysFontChar = IntGetCharDimensions(hSystemBM, &tmw, (DWORD*)&gpsi->cySysFontChar);
- gpsi->tmSysFont = tmw;
-
- /* Put the pointer in the center of the screen */
- gpsi->ptCursor.x = gpsi->aiSysMet[SM_CXSCREEN] / 2;
- gpsi->ptCursor.y = gpsi->aiSysMet[SM_CYSCREEN] / 2;
-
- /* Attach monitor */
- UserAttachMonitor((HDEV)gppdevPrimary);
-
- /* Setup the cursor */
- co_IntLoadDefaultCursors();
-
- /* Setup the icons */
- co_IntSetWndIcons();
-
- /* Setup Menu */
- MenuInit();
-
- /* Show the desktop */
- pdesk = IntGetActiveDesktop();
- ASSERT(pdesk);
- co_IntShowDesktop(pdesk, gpsi->aiSysMet[SM_CXSCREEN], gpsi->aiSysMet[SM_CYSCREEN], TRUE);
-
- return TRUE;
-}
-
-VOID FASTCALL
-IntEndDesktopGraphics(VOID)
-{
- if (NULL != ScreenDeviceContext)
- { // No need to allocate a new dcattr.
- GreSetDCOwner(ScreenDeviceContext, GDI_OBJ_HMGR_POWNED);
- GreDeleteObject(ScreenDeviceContext);
- ScreenDeviceContext = NULL;
- }
- IntHideDesktop(IntGetActiveDesktop());
- IntDestroyPrimarySurface();
-}
-
-HDC FASTCALL
-IntGetScreenDC(VOID)
-{
- return ScreenDeviceContext;
-}
-
-BOOL FASTCALL
-CheckWinstaAttributeAccess(ACCESS_MASK DesiredAccess)
-{
- PPROCESSINFO ppi = PsGetCurrentProcessWin32Process();
- if ( gpidLogon != PsGetCurrentProcessId() )
- {
- if (!(ppi->W32PF_flags & W32PF_IOWINSTA))
- {
- ERR("Requires Interactive Window Station\n");
- EngSetLastError(ERROR_REQUIRES_INTERACTIVE_WINDOWSTATION);
- return FALSE;
- }
- if (!RtlAreAllAccessesGranted(ppi->amwinsta, DesiredAccess))
- {
- ERR("Access Denied\n");
- EngSetLastError(ERROR_ACCESS_DENIED);
- return FALSE;
- }
- }
- return TRUE;
-}
-
-
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-/*
- * NtUserCreateWindowStation
- *
- * Creates a new window station.
- *
- * Parameters
- * lpszWindowStationName
- * Pointer to a null-terminated string specifying the name of the
- * window station to be created. Window station names are
- * case-insensitive and cannot contain backslash characters (\).
- * Only members of the Administrators group are allowed to specify a
- * name.
- *
- * dwDesiredAccess
- * Requested type of access
- *
- * lpSecurity
- * Security descriptor
- *
- * Unknown3, Unknown4, Unknown5
- * Unused
- *
- * Return Value
- * If the function succeeds, the return value is a handle to the newly
- * created window station. If the specified window station already
- * exists, the function succeeds and returns a handle to the existing
- * window station. If the function fails, the return value is NULL.
- *
- * Todo
- * Correct the prototype to match the Windows one (with 7 parameters
- * on Windows XP).
- *
- * Status
- * @implemented
- */
-
-HWINSTA APIENTRY
-NtUserCreateWindowStation(
- POBJECT_ATTRIBUTES ObjectAttributes,
- ACCESS_MASK dwDesiredAccess,
- DWORD Unknown2,
- DWORD Unknown3,
- DWORD Unknown4,
- DWORD Unknown5,
- DWORD Unknown6)
-{
- UNICODE_STRING WindowStationName;
- PWINSTATION_OBJECT WindowStationObject;
- HWINSTA WindowStation;
- NTSTATUS Status;
-
- TRACE("NtUserCreateWindowStation called\n");
-
- Status = ObOpenObjectByName(ObjectAttributes,
- ExWindowStationObjectType,
- UserMode,
- NULL,
- dwDesiredAccess,
- NULL,
- (PVOID*)&WindowStation);
-
- if (NT_SUCCESS(Status))
- {
- TRACE("NtUserCreateWindowStation opened window station %wZ\n", ObjectAttributes->ObjectName);
- return (HWINSTA)WindowStation;
- }
-
- /*
- * No existing window station found, try to create new one
- */
-
- /* Capture window station name */
- _SEH2_TRY
- {
- ProbeForRead( ObjectAttributes, sizeof(OBJECT_ATTRIBUTES), 1);
- Status = IntSafeCopyUnicodeStringTerminateNULL(&WindowStationName, ObjectAttributes->ObjectName);
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- Status =_SEH2_GetExceptionCode();
- }
- _SEH2_END
-
- if (! NT_SUCCESS(Status))
- {
- ERR("Failed reading capturing window station name\n");
- SetLastNtError(Status);
- return NULL;
- }
-
- /* Create the window station object */
- Status = ObCreateObject(UserMode,
- ExWindowStationObjectType,
- ObjectAttributes,
- UserMode,
- NULL,
- sizeof(WINSTATION_OBJECT),
- 0,
- 0,
- (PVOID*)&WindowStationObject);
-
- if (!NT_SUCCESS(Status))
- {
- ERR("ObCreateObject failed with %lx for window station %wZ\n", Status, &WindowStationName);
- ExFreePoolWithTag(WindowStationName.Buffer, TAG_STRING);
- SetLastNtError(STATUS_INSUFFICIENT_RESOURCES);
- return 0;
- }
-
- /* Initialize the window station */
- RtlZeroMemory(WindowStationObject, sizeof(WINSTATION_OBJECT));
-
- InitializeListHead(&WindowStationObject->DesktopListHead);
- WindowStationObject->Name = WindowStationName;
- WindowStationObject->dwSessionId = NtCurrentPeb()->SessionId;
- Status = RtlCreateAtomTable(37, &WindowStationObject->AtomTable);
- if (!NT_SUCCESS(Status))
- {
- ERR("RtlCreateAtomTable failed with %lx for window station %wZ\n", Status, &WindowStationName);
- ObDereferenceObject(WindowStationObject);
- SetLastNtError(STATUS_INSUFFICIENT_RESOURCES);
- return 0;
- }
-
- Status = ObInsertObject((PVOID)WindowStationObject,
- NULL,
- dwDesiredAccess,
- 0,
- NULL,
- (PVOID*)&WindowStation);
-
- if (!NT_SUCCESS(Status))
- {
- ERR("ObInsertObject failed with %lx for window station\n", Status);
- SetLastNtError(STATUS_INSUFFICIENT_RESOURCES);
- return 0;
- }
-
- if (InputWindowStation == NULL)
- {
- ERR("Initializing input window station\n");
- InputWindowStation = WindowStationObject;
-
- WindowStationObject->Flags &= ~WSS_NOIO;
-
- InitCursorImpl();
- }
- else
- {
- WindowStationObject->Flags |= WSS_NOIO;
- }
-
- TRACE("NtUserCreateWindowStation created object %p with name %wZ handle %p\n",
- WindowStation, &WindowStationObject->Name, WindowStation);
- return WindowStation;
-}
-
-/*
- * NtUserOpenWindowStation
- *
- * Opens an existing window station.
- *
- * Parameters
- * lpszWindowStationName
- * Name of the existing window station.
- *
- * dwDesiredAccess
- * Requested type of access.
- *
- * Return Value
- * If the function succeeds, the return value is the handle to the
- * specified window station. If the function fails, the return value
- * is NULL.
- *
- * Remarks
- * The returned handle can be closed with NtUserCloseWindowStation.
- *
- * Status
- * @implemented
- */
-
-HWINSTA APIENTRY
-NtUserOpenWindowStation(
- POBJECT_ATTRIBUTES ObjectAttributes,
- ACCESS_MASK dwDesiredAccess)
-{
- HWINSTA hwinsta;
- NTSTATUS Status;
-
- Status = ObOpenObjectByName(ObjectAttributes,
- ExWindowStationObjectType,
- UserMode,
- NULL,
- dwDesiredAccess,
- NULL,
- (PVOID*)&hwinsta);
-
- if (!NT_SUCCESS(Status))
- {
- ERR("NtUserOpenWindowStation failed\n");
- SetLastNtError(Status);
- return 0;
- }
-
- TRACE("Opened window station %wZ with handle %p\n", ObjectAttributes->ObjectName, hwinsta);
-
- return hwinsta;
-}
-
-/*
- * NtUserCloseWindowStation
- *
- * Closes a window station handle.
- *
- * Parameters
- * hWinSta
- * Handle to the window station.
- *
- * Return Value
- * Status
- *
- * Remarks
- * The window station handle can be created with NtUserCreateWindowStation
- * or NtUserOpenWindowStation. Attemps to close a handle to the window
- * station assigned to the calling process will fail.
- *
- * Status
- * @implemented
- */
-
-BOOL
-APIENTRY
-NtUserCloseWindowStation(
- HWINSTA hWinSta)
-{
- PWINSTATION_OBJECT Object;
- NTSTATUS Status;
-
- TRACE("NtUserCloseWindowStation called (%p)\n", hWinSta);
-
- if (hWinSta == UserGetProcessWindowStation())
- {
- ERR("Attempted to close process window station\n");
- return FALSE;
- }
-
- Status = IntValidateWindowStationHandle(hWinSta,
- UserMode,
- 0,
- &Object,
- 0);
-
- if (!NT_SUCCESS(Status))
- {
- ERR("Validation of window station handle (%p) failed\n", hWinSta);
- return FALSE;
- }
-
- ObDereferenceObject(Object);
-
- TRACE("Closing window station handle (%p)\n", hWinSta);
-
- Status = ObCloseHandle(hWinSta, UserMode);
- if (!NT_SUCCESS(Status))
- {
- SetLastNtError(Status);
- return FALSE;
- }
-
- return TRUE;
-}
-
-/*
- * NtUserGetObjectInformation
- *
- * The NtUserGetObjectInformation function retrieves information about a
- * window station or desktop object.
- *
- * Parameters
- * hObj
- * Handle to the window station or desktop object for which to
- * return information. This can be a handle of type HDESK or HWINSTA
- * (for example, a handle returned by NtUserCreateWindowStation,
- * NtUserOpenWindowStation, NtUserCreateDesktop, or NtUserOpenDesktop).
- *
- * nIndex
- * Specifies the object information to be retrieved.
- *
- * pvInfo
- * Pointer to a buffer to receive the object information.
- *
- * nLength
- * Specifies the size, in bytes, of the buffer pointed to by the
- * pvInfo parameter.
- *
- * lpnLengthNeeded
- * Pointer to a variable receiving the number of bytes required to
- * store the requested information. If this variable's value is
- * greater than the value of the nLength parameter when the function
- * returns, the function returns FALSE, and none of the information
- * is copied to the pvInfo buffer. If the value of the variable pointed
- * to by lpnLengthNeeded is less than or equal to the value of nLength,
- * the entire information block is copied.
- *
- * Return Value
- * If the function succeeds, the return value is nonzero. If the function
- * fails, the return value is zero.
- *
- * Status
- * @unimplemented
- */
-
-BOOL APIENTRY
-NtUserGetObjectInformation(
- HANDLE hObject,
- DWORD nIndex,
- PVOID pvInformation,
- DWORD nLength,
- PDWORD nLengthNeeded)
-{
- NTSTATUS Status;
- PWINSTATION_OBJECT WinStaObject = NULL;
- PDESKTOP DesktopObject = NULL;
- USEROBJECTFLAGS ObjectFlags;
- PVOID pvData = NULL;
- DWORD nDataSize = 0;
-
- _SEH2_TRY
- {
- if (nLengthNeeded)
- ProbeForWrite(nLengthNeeded, sizeof(*nLengthNeeded), 1);
- ProbeForWrite(pvInformation, nLength, 1);
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- SetLastNtError(_SEH2_GetExceptionCode());
- return FALSE;
- }
- _SEH2_END;
-
- /* Try window station */
- TRACE("Trying to open window station %p\n", hObject);
- Status = ObReferenceObjectByHandle(hObject,
- 0,
- ExWindowStationObjectType,
- UserMode,
- (PVOID*)&WinStaObject,
- NULL);
-
- if (Status == STATUS_OBJECT_TYPE_MISMATCH)
- {
- /* Try desktop */
- TRACE("Trying to open desktop %p\n", hObject);
- WinStaObject = NULL;
- Status = IntValidateDesktopHandle(hObject,
- UserMode,
- 0,
- &DesktopObject);
- }
-
- if (!NT_SUCCESS(Status))
- {
- ERR("Failed: 0x%x\n", Status);
- goto Exit;
- }
-
- TRACE("WinSta or Desktop opened!!\n");
-
- /* Get data */
- switch (nIndex)
- {
- case UOI_FLAGS:
- {
- /* This is a default implementation that does almost nothing */
- ObjectFlags.fInherit = FALSE;
- ObjectFlags.fReserved = FALSE;
- ObjectFlags.dwFlags = 0;
-
- pvData = &ObjectFlags;
- nDataSize = sizeof(ObjectFlags);
- Status = STATUS_SUCCESS;
- ERR("UOI_FLAGS unimplemented!\n");
- break;
- }
-
- case UOI_NAME:
- {
- if (WinStaObject != NULL)
- {
- pvData = WinStaObject->Name.Buffer;
- nDataSize = WinStaObject->Name.Length + sizeof(WCHAR);
- Status = STATUS_SUCCESS;
- }
- else if (DesktopObject != NULL)
- {
- pvData = DesktopObject->pDeskInfo->szDesktopName;
- nDataSize = (wcslen(DesktopObject->pDeskInfo->szDesktopName) + 1) * sizeof(WCHAR);
- Status = STATUS_SUCCESS;
- }
- else
- {
- Status = STATUS_INVALID_PARAMETER;
- }
- break;
- }
-
- case UOI_TYPE:
- {
- if (WinStaObject != NULL)
- {
- pvData = L"WindowStation";
- nDataSize = sizeof(L"WindowStation");
- Status = STATUS_SUCCESS;
- }
- else if (DesktopObject != NULL)
- {
- pvData = L"Desktop";
- nDataSize = sizeof(L"Desktop");
- Status = STATUS_SUCCESS;
- }
- else
- {
- Status = STATUS_INVALID_PARAMETER;
- }
- break;
- }
-
- case UOI_USER_SID:
- Status = STATUS_NOT_IMPLEMENTED;
- ERR("UOI_USER_SID unimplemented!\n");
- break;
-
- default:
- Status = STATUS_INVALID_PARAMETER;
- break;
- }
-
-Exit:
- if ((Status == STATUS_SUCCESS) && (nLength < nDataSize))
- Status = STATUS_BUFFER_TOO_SMALL;
-
- _SEH2_TRY
- {
- if (nLengthNeeded)
- *nLengthNeeded = nDataSize;
-
- /* Try to copy data to caller */
- if (Status == STATUS_SUCCESS)
- {
- TRACE("Trying to copy data to caller (len = %lu, len needed = %lu)\n", nLength, nDataSize);
- RtlCopyMemory(pvInformation, pvData, nDataSize);
- }
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- /* Release objects */
- if (DesktopObject != NULL)
- ObDereferenceObject(DesktopObject);
- if (WinStaObject != NULL)
- ObDereferenceObject(WinStaObject);
-
- if (!NT_SUCCESS(Status))
- {
- SetLastNtError(Status);
- return FALSE;
- }
-
- return TRUE;
-}
-
-/*
- * NtUserSetObjectInformation
- *
- * The NtUserSetObjectInformation function sets information about a
- * window station or desktop object.
- *
- * Parameters
- * hObj
- * Handle to the window station or desktop object for which to set
- * object information. This value can be a handle of type HDESK or
- * HWINSTA.
- *
- * nIndex
- * Specifies the object information to be set.
- *
- * pvInfo
- * Pointer to a buffer containing the object information.
- *
- * nLength
- * Specifies the size, in bytes, of the information contained in the
- * buffer pointed to by pvInfo.
- *
- * Return Value
- * If the function succeeds, the return value is nonzero. If the function
- * fails the return value is zero.
- *
- * Status
- * @unimplemented
- */
-
-BOOL
-APIENTRY
-NtUserSetObjectInformation(
- HANDLE hObject,
- DWORD nIndex,
- PVOID pvInformation,
- DWORD nLength)
-{
- /* FIXME: ZwQueryObject */
- /* FIXME: ZwSetInformationObject */
- SetLastNtError(STATUS_UNSUCCESSFUL);
- return FALSE;
-}
-
-
-
-
-HWINSTA FASTCALL
-UserGetProcessWindowStation(VOID)
-{
- PPROCESSINFO ppi = PsGetCurrentProcessWin32Process();
-
- return ppi->hwinsta;
-}
-
-
-/*
- * NtUserGetProcessWindowStation
- *
- * Returns a handle to the current process window station.
- *
- * Return Value
- * If the function succeeds, the return value is handle to the window
- * station assigned to the current process. If the function fails, the
- * return value is NULL.
- *
- * Status
- * @implemented
- */
-
-HWINSTA APIENTRY
-NtUserGetProcessWindowStation(VOID)
-{
- return UserGetProcessWindowStation();
-}
-
-BOOL FASTCALL
-UserSetProcessWindowStation(HWINSTA hWindowStation)
-{
- PPROCESSINFO ppi;
- NTSTATUS Status;
- HWINSTA hwinstaOld;
- OBJECT_HANDLE_INFORMATION ObjectHandleInfo;
- PWINSTATION_OBJECT NewWinSta = NULL, OldWinSta;
-
- ppi = PsGetCurrentProcessWin32Process();
-
- /* Reference the new window station */
- if(hWindowStation !=NULL)
- {
- Status = IntValidateWindowStationHandle(hWindowStation,
- UserMode,
- 0,
- &NewWinSta,
- &ObjectHandleInfo);
- if (!NT_SUCCESS(Status))
- {
- TRACE("Validation of window station handle (%p) failed\n",
- hWindowStation);
- SetLastNtError(Status);
- return FALSE;
- }
- }
-
- OldWinSta = ppi->prpwinsta;
- hwinstaOld = PsGetProcessWin32WindowStation(ppi->peProcess);
-
- /* Dereference the previous window station */
- if(OldWinSta != NULL)
- {
- ObDereferenceObject(OldWinSta);
- }
-
- /* Check if we have a stale handle (it should happen for console apps) */
- if(hwinstaOld != ppi->hwinsta)
- {
- ObCloseHandle(hwinstaOld, UserMode);
- }
-
- /*
- * FIXME: Don't allow changing the window station if there are threads that are attached to desktops and own GUI objects.
- */
-
- PsSetProcessWindowStation(ppi->peProcess, hWindowStation);
-
- ppi->prpwinsta = NewWinSta;
- ppi->hwinsta = hWindowStation;
- ppi->amwinsta = hWindowStation != NULL ? ObjectHandleInfo.GrantedAccess : 0;
- TRACE("WS : Granted Access 0x%08lx\n",ppi->amwinsta);
-
- if (RtlAreAllAccessesGranted(ppi->amwinsta, WINSTA_READSCREEN))
- {
- ppi->W32PF_flags |= W32PF_READSCREENACCESSGRANTED;
- }
- else
- {
- ppi->W32PF_flags &= ~W32PF_READSCREENACCESSGRANTED;
- }
-
- if (NewWinSta && !(NewWinSta->Flags & WSS_NOIO) )
- {
- ppi->W32PF_flags |= W32PF_IOWINSTA;
- }
- else // Might be closed if the handle is null.
- {
- ppi->W32PF_flags &= ~W32PF_IOWINSTA;
- }
- return TRUE;
-}
-
-/*
- * NtUserSetProcessWindowStation
- *
- * Assigns a window station to the current process.
- *
- * Parameters
- * hWinSta
- * Handle to the window station.
- *
- * Return Value
- * Status
- *
- * Status
- * @implemented
- */
-
-BOOL APIENTRY
-NtUserSetProcessWindowStation(HWINSTA hWindowStation)
-{
- BOOL ret;
-
- UserEnterExclusive();
-
- ret = UserSetProcessWindowStation(hWindowStation);
-
- UserLeave();
-
- return ret;
-}
-
-/*
- * NtUserLockWindowStation
- *
- * Locks switching desktops. Only the logon application is allowed to call this function.
- *
- * Status
- * @implemented
- */
-
-BOOL APIENTRY
-NtUserLockWindowStation(HWINSTA hWindowStation)
-{
- PWINSTATION_OBJECT Object;
- NTSTATUS Status;
-
- TRACE("About to set process window station with handle (%p)\n",
- hWindowStation);
-
- if (gpidLogon != PsGetCurrentProcessId())
- {
- ERR("Unauthorized process attempted to lock the window station!\n");
- EngSetLastError(ERROR_ACCESS_DENIED);
- return FALSE;
- }
-
- Status = IntValidateWindowStationHandle(hWindowStation,
- UserMode,
- 0,
- &Object,
- 0);
- if (!NT_SUCCESS(Status))
- {
- TRACE("Validation of window station handle (%p) failed\n",
- hWindowStation);
- SetLastNtError(Status);
- return FALSE;
- }
-
- Object->Flags |= WSS_LOCKED;
-
- ObDereferenceObject(Object);
- return TRUE;
-}
-
-/*
- * NtUserUnlockWindowStation
- *
- * Unlocks switching desktops. Only the logon application is allowed to call this function.
- *
- * Status
- * @implemented
- */
-
-BOOL APIENTRY
-NtUserUnlockWindowStation(HWINSTA hWindowStation)
-{
- PWINSTATION_OBJECT Object;
- NTSTATUS Status;
- BOOL Ret;
-
- TRACE("About to set process window station with handle (%p)\n",
- hWindowStation);
-
- if (gpidLogon != PsGetCurrentProcessId())
- {
- ERR("Unauthorized process attempted to unlock the window station!\n");
- EngSetLastError(ERROR_ACCESS_DENIED);
- return FALSE;
- }
-
- Status = IntValidateWindowStationHandle(hWindowStation,
- UserMode,
- 0,
- &Object,
- 0);
- if (!NT_SUCCESS(Status))
- {
- TRACE("Validation of window station handle (%p) failed\n",
- hWindowStation);
- SetLastNtError(Status);
- return FALSE;
- }
-
- Ret = (Object->Flags & WSS_LOCKED) == WSS_LOCKED;
- Object->Flags &= ~WSS_LOCKED;
-
- ObDereferenceObject(Object);
- return Ret;
-}
-
-static NTSTATUS FASTCALL
-BuildWindowStationNameList(
- ULONG dwSize,
- PVOID lpBuffer,
- PULONG pRequiredSize)
-{
- OBJECT_ATTRIBUTES ObjectAttributes;
- NTSTATUS Status;
- HANDLE DirectoryHandle;
- char InitialBuffer[256], *Buffer;
- ULONG Context, ReturnLength, BufferSize;
- DWORD EntryCount;
- POBJECT_DIRECTORY_INFORMATION DirEntry;
- WCHAR NullWchar;
-
- /*
- * Try to open the directory.
- */
- InitializeObjectAttributes(&ObjectAttributes,
- &gustrWindowStationsDir,
- OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
- NULL,
- NULL);
-
- Status = ZwOpenDirectoryObject(&DirectoryHandle,
- DIRECTORY_QUERY,
- &ObjectAttributes);
-
- if (!NT_SUCCESS(Status))
- {
- return Status;
- }
-
- /* First try to query the directory using a fixed-size buffer */
- Context = 0;
- Buffer = NULL;
- Status = ZwQueryDirectoryObject(DirectoryHandle,
- InitialBuffer,
- sizeof(InitialBuffer),
- FALSE,
- TRUE,
- &Context,
- &ReturnLength);
- if (NT_SUCCESS(Status))
- {
- if (STATUS_NO_MORE_ENTRIES == ZwQueryDirectoryObject(DirectoryHandle, NULL, 0, FALSE,
- FALSE, &Context, NULL))
- {
- /* Our fixed-size buffer is large enough */
- Buffer = InitialBuffer;
- }
- }
-
- if (NULL == Buffer)
- {
- /* Need a larger buffer, check how large exactly */
- Status = ZwQueryDirectoryObject(DirectoryHandle, NULL, 0, FALSE, TRUE, &Context,
- &ReturnLength);
- if (!NT_SUCCESS(Status))
- {
- ERR("ZwQueryDirectoryObject failed\n");
- ZwClose(DirectoryHandle);
- return Status;
- }
-
- BufferSize = ReturnLength;
- Buffer = ExAllocatePoolWithTag(PagedPool, BufferSize, TAG_WINSTA);
- if (NULL == Buffer)
- {
- ZwClose(DirectoryHandle);
- return STATUS_NO_MEMORY;
- }
-
- /* We should have a sufficiently large buffer now */
- Context = 0;
- Status = ZwQueryDirectoryObject(DirectoryHandle, Buffer, BufferSize,
- FALSE, TRUE, &Context, &ReturnLength);
- if (! NT_SUCCESS(Status) ||
- STATUS_NO_MORE_ENTRIES != ZwQueryDirectoryObject(DirectoryHandle, NULL, 0, FALSE,
- FALSE, &Context, NULL))
- {
- /* Something went wrong, maybe someone added a directory entry? Just give up. */
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- ZwClose(DirectoryHandle);
- return NT_SUCCESS(Status) ? STATUS_INTERNAL_ERROR : Status;
- }
- }
-
- ZwClose(DirectoryHandle);
-
- /*
- * Count the required size of buffer.
- */
- ReturnLength = sizeof(DWORD);
- EntryCount = 0;
- for (DirEntry = (POBJECT_DIRECTORY_INFORMATION) Buffer;
- 0 != DirEntry->Name.Length;
- DirEntry++)
- {
- ReturnLength += DirEntry->Name.Length + sizeof(WCHAR);
- EntryCount++;
- }
- TRACE("Required size: %lu Entry count: %lu\n", ReturnLength, EntryCount);
- if (NULL != pRequiredSize)
- {
- Status = MmCopyToCaller(pRequiredSize, &ReturnLength, sizeof(ULONG));
- if (! NT_SUCCESS(Status))
- {
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
- return STATUS_BUFFER_TOO_SMALL;
- }
- }
-
- /*
- * Check if the supplied buffer is large enough.
- */
- if (dwSize < ReturnLength)
- {
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
- return STATUS_BUFFER_TOO_SMALL;
- }
-
- /*
- * Generate the resulting buffer contents.
- */
- Status = MmCopyToCaller(lpBuffer, &EntryCount, sizeof(DWORD));
- if (! NT_SUCCESS(Status))
- {
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR) lpBuffer + sizeof(DWORD));
-
- NullWchar = L'\0';
- for (DirEntry = (POBJECT_DIRECTORY_INFORMATION) Buffer;
- 0 != DirEntry->Name.Length;
- DirEntry++)
- {
- Status = MmCopyToCaller(lpBuffer, DirEntry->Name.Buffer, DirEntry->Name.Length);
- if (! NT_SUCCESS(Status))
- {
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR) lpBuffer + DirEntry->Name.Length);
- Status = MmCopyToCaller(lpBuffer, &NullWchar, sizeof(WCHAR));
- if (! NT_SUCCESS(Status))
- {
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR) lpBuffer + sizeof(WCHAR));
- }
-
- /*
- * Clean up
- */
- if (Buffer != InitialBuffer)
- {
- ExFreePoolWithTag(Buffer, TAG_WINSTA);
- }
-
- return STATUS_SUCCESS;
-}
-
-static NTSTATUS FASTCALL
-BuildDesktopNameList(
- HWINSTA hWindowStation,
- ULONG dwSize,
- PVOID lpBuffer,
- PULONG pRequiredSize)
-{
- NTSTATUS Status;
- PWINSTATION_OBJECT WindowStation;
- PLIST_ENTRY DesktopEntry;
- PDESKTOP DesktopObject;
- DWORD EntryCount;
- ULONG ReturnLength;
- WCHAR NullWchar;
- UNICODE_STRING DesktopName;
-
- Status = IntValidateWindowStationHandle(hWindowStation,
- UserMode,
- 0,
- &WindowStation,
- 0);
- if (! NT_SUCCESS(Status))
- {
- return Status;
- }
-
- /*
- * Count the required size of buffer.
- */
- ReturnLength = sizeof(DWORD);
- EntryCount = 0;
- for (DesktopEntry = WindowStation->DesktopListHead.Flink;
- DesktopEntry != &WindowStation->DesktopListHead;
- DesktopEntry = DesktopEntry->Flink)
- {
- DesktopObject = CONTAINING_RECORD(DesktopEntry, DESKTOP, ListEntry);
- RtlInitUnicodeString(&DesktopName, DesktopObject->pDeskInfo->szDesktopName);
- ReturnLength += DesktopName.Length + sizeof(WCHAR);
- EntryCount++;
- }
- TRACE("Required size: %lu Entry count: %lu\n", ReturnLength, EntryCount);
- if (NULL != pRequiredSize)
- {
- Status = MmCopyToCaller(pRequiredSize, &ReturnLength, sizeof(ULONG));
- if (! NT_SUCCESS(Status))
- {
- ObDereferenceObject(WindowStation);
- return STATUS_BUFFER_TOO_SMALL;
- }
- }
-
- /*
- * Check if the supplied buffer is large enough.
- */
- if (dwSize < ReturnLength)
- {
- ObDereferenceObject(WindowStation);
- return STATUS_BUFFER_TOO_SMALL;
- }
-
- /*
- * Generate the resulting buffer contents.
- */
- Status = MmCopyToCaller(lpBuffer, &EntryCount, sizeof(DWORD));
- if (! NT_SUCCESS(Status))
- {
- ObDereferenceObject(WindowStation);
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR) lpBuffer + sizeof(DWORD));
-
- NullWchar = L'\0';
- for (DesktopEntry = WindowStation->DesktopListHead.Flink;
- DesktopEntry != &WindowStation->DesktopListHead;
- DesktopEntry = DesktopEntry->Flink)
- {
- DesktopObject = CONTAINING_RECORD(DesktopEntry, DESKTOP, ListEntry);
- RtlInitUnicodeString(&DesktopName, DesktopObject->pDeskInfo->szDesktopName);
- Status = MmCopyToCaller(lpBuffer, DesktopName.Buffer, DesktopName.Length);
- if (! NT_SUCCESS(Status))
- {
- ObDereferenceObject(WindowStation);
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR)lpBuffer + DesktopName.Length);
- Status = MmCopyToCaller(lpBuffer, &NullWchar, sizeof(WCHAR));
- if (! NT_SUCCESS(Status))
- {
- ObDereferenceObject(WindowStation);
- return Status;
- }
- lpBuffer = (PVOID) ((PCHAR) lpBuffer + sizeof(WCHAR));
- }
-
- /*
- * Clean up and return
- */
- ObDereferenceObject(WindowStation);
- return STATUS_SUCCESS;
-}
-
-/*
- * NtUserBuildNameList
- *
- * Function used for enumeration of desktops or window stations.
- *
- * Parameters
- * hWinSta
- * For enumeration of window stations this parameter must be set to
- * zero. Otherwise it's handle for window station.
- *
- * dwSize
- * Size of buffer passed by caller.
- *
- * lpBuffer
- * Buffer passed by caller. If the function succeeds, the buffer is
- * filled with window station/desktop count (in first DWORD) and
- * NULL-terminated window station/desktop names.
- *
- * pRequiredSize
- * If the function succeeds, this is the number of bytes copied.
- * Otherwise it's size of buffer needed for function to succeed.
- *
- * Status
- * @implemented
- */
-
-NTSTATUS APIENTRY
-NtUserBuildNameList(
- HWINSTA hWindowStation,
- ULONG dwSize,
- PVOID lpBuffer,
- PULONG pRequiredSize)
-{
- /* The WindowStation name list and desktop name list are build in completely
- different ways. Call the appropriate function */
- return NULL == hWindowStation ? BuildWindowStationNameList(dwSize, lpBuffer, pRequiredSize) :
- BuildDesktopNameList(hWindowStation, dwSize, lpBuffer, pRequiredSize);
-}
-
-/*
- * @implemented
- */
-BOOL APIENTRY
-NtUserSetLogonNotifyWindow(HWND hWnd)
-{
- if (gpidLogon != PsGetCurrentProcessId())
- {
- return FALSE;
- }
-
- if (!IntIsWindow(hWnd))
- {
- return FALSE;
- }
-
- hwndSAS = hWnd;
-
- return TRUE;
-}
-
-BOOL
-APIENTRY
-NtUserLockWorkStation(VOID)
-{
- BOOL ret;
- PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
-
- UserEnterExclusive();
-
- if (pti->rpdesk == IntGetActiveDesktop())
- {
- ret = UserPostMessage(hwndSAS, WM_LOGONNOTIFY, LN_LOCK_WORKSTATION, 0);
- }
- else
- {
- ret = FALSE;
- }
-
- UserLeave();
-
- return ret;
-}
-
-BOOL APIENTRY
-NtUserSetWindowStationUser(
- HWINSTA hWindowStation,
- PLUID pluid,
- PSID psid,
- DWORD size)
-{
- NTSTATUS Status;
- PWINSTATION_OBJECT WindowStation = NULL;
- BOOL Ret = FALSE;
-
- UserEnterExclusive();
-
- if (gpidLogon != PsGetCurrentProcessId())
- {
- EngSetLastError(ERROR_ACCESS_DENIED);
- goto Leave;
- }
-
- Status = IntValidateWindowStationHandle(hWindowStation,
- UserMode,
- 0,
- &WindowStation,
- 0);
- if (!NT_SUCCESS(Status))
- {
- goto Leave;
- }
-
- if (WindowStation->psidUser)
- {
- ExFreePoolWithTag(WindowStation->psidUser, USERTAG_SECURITY);
- }
-
- WindowStation->psidUser = ExAllocatePoolWithTag(PagedPool, size, USERTAG_SECURITY);
- if (WindowStation->psidUser == NULL)
- {
- EngSetLastError(ERROR_OUTOFMEMORY);
- goto Leave;
- }
-
- _SEH2_TRY
- {
- ProbeForRead( psid, size, 1);
- ProbeForRead( pluid, sizeof(LUID), 1);
-
- RtlCopyMemory(WindowStation->psidUser, psid, size);
- WindowStation->luidUser = *pluid;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- if (!NT_SUCCESS(Status))
- {
- ExFreePoolWithTag(WindowStation->psidUser, USERTAG_SECURITY);
- WindowStation->psidUser = 0;
- goto Leave;
- }
-
- Ret = TRUE;
-
-Leave:
- if (WindowStation) ObDereferenceObject(WindowStation);
- UserLeave();
- return Ret;
-}
-
-
-/* EOF */
projects / reactos.git / blobdiff