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[WIN32K:NTUSER] Make NtUserResolveDesktop() and IntResolveDesktop() work in a more Win2k3-compatible manner.
CORE-11933 and PR #621. Since this API is also called from WINSRV when calling the AllocConsole() API, it can be tested more-or-less easily. The internal helper IntResolveDesktop() is also tested during process connection to a window station, when such process first calls a USER32 or GDI32 function. This is also the functionality tested by the user32:desktop apitest. - Adjust how IntResolveDesktop() is called.
This commit is contained in:
parent
83104d9f00
commit
c697f191cf
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@ -2912,11 +2912,11 @@ NtUserRemoveProp(
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ATOM Atom);
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HDESK
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APIENTRY
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NTAPI
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NtUserResolveDesktop(
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IN HANDLE ProcessHandle,
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IN PUNICODE_STRING DesktopPath,
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DWORD dwUnknown,
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IN BOOL bInherit,
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OUT HWINSTA* phWinSta);
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DWORD
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@ -447,139 +447,726 @@ GetSystemVersionString(OUT PWSTR pwszzVersion,
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}
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NTSTATUS FASTCALL
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IntParseDesktopPath(PEPROCESS Process,
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PUNICODE_STRING DesktopPath,
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HWINSTA *hWinSta,
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HDESK *hDesktop)
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{
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OBJECT_ATTRIBUTES ObjectAttributes;
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UNICODE_STRING ObjectName;
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NTSTATUS Status;
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WCHAR wstrWinstaFullName[MAX_PATH], *pwstrWinsta = NULL, *pwstrDesktop = NULL;
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/*
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* IntResolveDesktop
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*
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* The IntResolveDesktop function attempts to retrieve valid handles to
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* a desktop and a window station suitable for the specified process.
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* The specified desktop path string is used only as a hint for the resolution.
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*
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* - If the process is already assigned to a window station and a desktop,
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* handles to these objects are returned directly regardless of the specified
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* desktop path string. This is what happens when this function is called for
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* a process that has been already started and connected to the Win32 USER.
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*
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* - If the process is being connected to the Win32 USER, or is in a state
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* where a window station is assigned to it but no desktop yet, the desktop
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* path string is used as a hint for the resolution.
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* A specified window station (if any, otherwise "WinSta0" is used as default)
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* is tested for existence and accessibility. If the checks are OK a handle
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* to it is returned. Otherwise we either fail (the window station does not
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* exist) or, in case a default window station was used, we attempt to open
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* or create a non-interactive Service-0xXXXX-YYYY$ window station. This is
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* typically what happens when a non-interactive process is started while
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* the WinSta0 window station was used as the default one.
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* A specified desktop (if any, otherwise "Default" is used as default)
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* is then tested for existence on the opened window station.
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*
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* - Rules for the choice of the default window station, when none is specified
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* in the desktop path:
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*
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* 1. By default, a SYSTEM process connects to a non-interactive window
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* station, either the Service-0x0-3e7$ (from the SYSTEM LUID) station,
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* or one that has been inherited and that is non-interactive.
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* Only when the interactive window station WinSta0 is specified that
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* the process can connect to it (e.g. the case of interactive services).
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*
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* 2. An interactive process, i.e. a process whose LUID is the same as the
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* one assigned to WinSta0 by Winlogon on user logon, connects by default
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* to the WinSta0 window station, unless it has inherited from another
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* interactive window station (which must be... none other than WinSta0).
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*
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* 3. A non-interactive (but not SYSTEM) process connects by default to
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* a non-interactive Service-0xXXXX-YYYY$ window station (whose name
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* is derived from the process' LUID), or to another non-interactive
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* window station that has been inherited.
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* Otherwise it may be able connect to the interactive WinSta0 only if
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* it has explicit access rights to it.
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*
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* Parameters
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* Process
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* The user process object.
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*
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* DesktopPath
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* The desktop path string used as a hint for desktop resolution.
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*
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* bInherit
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* Whether or not the returned handles are inheritable.
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*
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* phWinSta
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* Pointer to a window station handle.
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*
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* phDesktop
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* Pointer to a desktop handle.
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*
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* Return Value
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* Status code.
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*/
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ASSERT(hWinSta);
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ASSERT(hDesktop);
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NTSTATUS
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FASTCALL
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IntResolveDesktop(
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IN PEPROCESS Process,
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IN PUNICODE_STRING DesktopPath,
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IN BOOL bInherit,
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OUT HWINSTA* phWinSta,
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OUT HDESK* phDesktop)
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{
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NTSTATUS Status;
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HWINSTA hWinSta = NULL, hWinStaDup = NULL;
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HDESK hDesktop = NULL, hDesktopDup = NULL;
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PPROCESSINFO ppi;
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HANDLE hProcess = NULL;
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LUID ProcessLuid;
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USHORT StrSize;
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SIZE_T MemSize;
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POBJECT_ATTRIBUTES ObjectAttributes = NULL;
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PUNICODE_STRING ObjectName;
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UNICODE_STRING WinStaName, DesktopName;
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const UNICODE_STRING WinSta0Name = RTL_CONSTANT_STRING(L"WinSta0");
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PWINSTATION_OBJECT WinStaObject;
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HWINSTA hTempWinSta = NULL;
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BOOLEAN bUseDefaultWinSta = FALSE;
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BOOLEAN bInteractive = FALSE;
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BOOLEAN bAccessAllowed = FALSE;
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ASSERT(phWinSta);
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ASSERT(phDesktop);
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ASSERT(DesktopPath);
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*hWinSta = NULL;
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*hDesktop = NULL;
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*phWinSta = NULL;
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*phDesktop = NULL;
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if (DesktopPath->Buffer != NULL && DesktopPath->Length > sizeof(WCHAR))
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ppi = PsGetProcessWin32Process(Process);
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/* ppi is typically NULL for console applications that connect to Win32 USER */
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if (!ppi) TRACE("IntResolveDesktop: ppi is NULL!\n");
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if (ppi && ppi->hwinsta != NULL && ppi->hdeskStartup != NULL)
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{
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/*
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* Parse the desktop path string which can be in the form "WinSta\Desktop"
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* or just "Desktop". In latter case WinSta0 will be used.
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* If this process is the current one, just return the cached handles.
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* Otherwise, open the window station and desktop objects.
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*/
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pwstrDesktop = wcschr(DesktopPath->Buffer, L'\\');
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if (pwstrDesktop != NULL)
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if (Process == PsGetCurrentProcess())
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{
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*pwstrDesktop = 0;
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pwstrDesktop++;
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pwstrWinsta = DesktopPath->Buffer;
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hWinSta = ppi->hwinsta;
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hDesktop = ppi->hdeskStartup;
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}
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else
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{
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pwstrDesktop = DesktopPath->Buffer;
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pwstrWinsta = NULL;
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Status = ObOpenObjectByPointer(ppi->prpwinsta,
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0,
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NULL,
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MAXIMUM_ALLOWED,
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ExWindowStationObjectType,
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UserMode,
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(PHANDLE)&hWinSta);
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if (!NT_SUCCESS(Status))
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{
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ERR("IntResolveDesktop: Could not reference window station 0x%p\n", ppi->prpwinsta);
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SetLastNtError(Status);
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return Status;
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}
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Status = ObOpenObjectByPointer(ppi->rpdeskStartup,
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0,
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NULL,
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MAXIMUM_ALLOWED,
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ExDesktopObjectType,
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UserMode,
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(PHANDLE)&hDesktop);
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if (!NT_SUCCESS(Status))
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{
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ERR("IntResolveDesktop: Could not reference desktop 0x%p\n", ppi->rpdeskStartup);
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ObCloseHandle(hWinSta, UserMode);
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SetLastNtError(Status);
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return Status;
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}
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}
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TRACE("IntParseDesktopPath pwstrWinsta:%S pwstrDesktop:%S\n", pwstrWinsta, pwstrDesktop);
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*phWinSta = hWinSta;
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*phDesktop = hDesktop;
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return STATUS_SUCCESS;
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}
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#if 0
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/* Search the process handle table for (inherited) window station
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handles, use a more appropriate one than WinSta0 if possible. */
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if (!ObFindHandleForObject(Process,
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NULL,
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ExWindowStationObjectType,
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NULL,
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(PHANDLE)hWinSta))
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#endif
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/* We will by default use the default window station and desktop */
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RtlInitEmptyUnicodeString(&WinStaName, NULL, 0);
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RtlInitEmptyUnicodeString(&DesktopName, NULL, 0);
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/*
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* Parse the desktop path string which can be of the form "WinSta\Desktop"
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* or just "Desktop". In the latter case we use the default window station
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* on which the process is attached to (or if none, "WinSta0").
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*/
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if (DesktopPath->Buffer != NULL && DesktopPath->Length > sizeof(WCHAR))
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{
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/* We had no luck searching for opened handles, use WinSta0 now */
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if (!pwstrWinsta)
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pwstrWinsta = L"WinSta0";
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DesktopName = *DesktopPath;
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/* Find the separator */
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while (DesktopName.Length > 0 && *DesktopName.Buffer &&
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*DesktopName.Buffer != OBJ_NAME_PATH_SEPARATOR)
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{
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DesktopName.Buffer++;
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DesktopName.Length -= sizeof(WCHAR);
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DesktopName.MaximumLength -= sizeof(WCHAR);
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}
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if (DesktopName.Length > 0)
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{
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RtlInitEmptyUnicodeString(&WinStaName, DesktopPath->Buffer,
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DesktopPath->Length - DesktopName.Length);
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// (USHORT)((ULONG_PTR)DesktopName.Buffer - (ULONG_PTR)DesktopPath->Buffer);
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WinStaName.Length = WinStaName.MaximumLength;
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/* Skip the separator */
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DesktopName.Buffer++;
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DesktopName.Length -= sizeof(WCHAR);
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DesktopName.MaximumLength -= sizeof(WCHAR);
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}
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else
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{
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RtlInitEmptyUnicodeString(&WinStaName, NULL, 0);
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DesktopName = *DesktopPath;
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}
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}
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#if 0
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/* Search the process handle table for (inherited) desktop
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handles, use a more appropriate one than Default if possible. */
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if (!ObFindHandleForObject(Process,
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NULL,
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ExDesktopObjectType,
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NULL,
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(PHANDLE)hDesktop))
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#endif
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TRACE("IntResolveDesktop: WinStaName:'%wZ' ; DesktopName:'%wZ'\n", &WinStaName, &DesktopName);
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/* Retrieve the process LUID */
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Status = GetProcessLuid(NULL, Process, &ProcessLuid);
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if (!NT_SUCCESS(Status))
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{
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/* We had no luck searching for opened handles, use Desktop now */
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if (!pwstrDesktop)
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pwstrDesktop = L"Default";
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ERR("IntResolveDesktop: Failed to retrieve the process LUID, Status 0x%08lx\n", Status);
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SetLastNtError(Status);
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return Status;
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}
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if (*hWinSta == NULL)
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/*
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* If this process is not the current one, obtain a temporary handle
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* to it so that we can perform handles duplication later.
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*/
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if (Process != PsGetCurrentProcess())
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{
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swprintf(wstrWinstaFullName, L"%wZ\\%ws", &gustrWindowStationsDir, pwstrWinsta);
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RtlInitUnicodeString( &ObjectName, wstrWinstaFullName);
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TRACE("parsed initial winsta: %wZ\n", &ObjectName);
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/* Open the window station */
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InitializeObjectAttributes(&ObjectAttributes,
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&ObjectName,
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OBJ_CASE_INSENSITIVE,
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NULL,
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NULL);
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Status = ObOpenObjectByName(&ObjectAttributes,
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ExWindowStationObjectType,
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KernelMode,
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NULL,
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WINSTA_ACCESS_ALL,
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NULL,
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(HANDLE*)hWinSta);
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Status = ObOpenObjectByPointer(Process,
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OBJ_KERNEL_HANDLE,
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NULL,
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0,
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*PsProcessType,
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KernelMode,
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&hProcess);
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if (!NT_SUCCESS(Status))
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{
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ERR("IntResolveDesktop: Failed to obtain a handle to process 0x%p, Status 0x%08lx\n", Process, Status);
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SetLastNtError(Status);
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ERR("Failed to reference window station %wZ PID: --!\n", &ObjectName );
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return Status;
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}
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ASSERT(hProcess);
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}
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/*
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* If no window station has been specified, search the process handle table
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* for inherited window station handles, otherwise use a default one.
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*/
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if (WinStaName.Buffer == NULL)
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{
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/*
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* We want to find a suitable default window station.
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* For applications that can be interactive, i.e. that have allowed
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* access to the single interactive window station on the system,
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* the default window station is 'WinSta0'.
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* For applications that cannot be interactive, i.e. that do not have
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* access to 'WinSta0' (e.g. non-interactive services), the default
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* window station is 'Service-0xXXXX-YYYY$' (created if needed).
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* Precedence will however be taken by any inherited window station
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* that possesses the required interactivity property.
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*/
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bUseDefaultWinSta = TRUE;
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/*
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* Use the default 'WinSta0' window station. Whether we should
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* use 'Service-0xXXXX-YYYY$' instead will be determined later.
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*/
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// RtlInitUnicodeString(&WinStaName, L"WinSta0");
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WinStaName = WinSta0Name;
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if (ObFindHandleForObject(Process,
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NULL,
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ExWindowStationObjectType,
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NULL,
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(PHANDLE)&hWinSta))
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{
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TRACE("IntResolveDesktop: Inherited window station is: 0x%p\n", hWinSta);
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}
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}
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if (*hDesktop == NULL)
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/*
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* If no desktop has been specified, search the process handle table
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* for inherited desktop handles, otherwise use the Default desktop.
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* Note that the inherited desktop that we may use, may not belong
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* to the window station we will connect to.
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*/
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if (DesktopName.Buffer == NULL)
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{
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RtlInitUnicodeString(&ObjectName, pwstrDesktop);
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/* Use a default desktop name */
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RtlInitUnicodeString(&DesktopName, L"Default");
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TRACE("parsed initial desktop: %wZ\n", &ObjectName);
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if (ObFindHandleForObject(Process,
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NULL,
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ExDesktopObjectType,
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NULL,
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(PHANDLE)&hDesktop))
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{
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TRACE("IntResolveDesktop: Inherited desktop is: 0x%p\n", hDesktop);
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}
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}
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/*
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* We are going to open either a window station or a desktop.
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* Even if this operation is done from kernel-mode, we should
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* "emulate" an opening from user-mode (i.e. using an ObjectAttributes
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* allocated in user-mode, with AccessMode == UserMode) for the
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* Object Manager to perform proper access validation to the
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* window station or desktop.
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*/
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/*
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* Estimate the maximum size needed for the window station name
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* and desktop name to be given to ObjectAttributes->ObjectName.
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*/
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StrSize = 0;
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/* Window station name */
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MemSize = _scwprintf(L"Service-0x%x-%x$", MAXULONG, MAXULONG) * sizeof(WCHAR);
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MemSize = gustrWindowStationsDir.Length + sizeof(OBJ_NAME_PATH_SEPARATOR)
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+ max(WinStaName.Length, MemSize) + sizeof(UNICODE_NULL);
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if (MemSize > MAXUSHORT)
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{
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ERR("IntResolveDesktop: Window station name length is too long.\n");
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Status = STATUS_NAME_TOO_LONG;
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goto Quit;
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}
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StrSize = max(StrSize, (USHORT)MemSize);
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/* Desktop name */
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MemSize = max(DesktopName.Length + sizeof(UNICODE_NULL), sizeof(L"Default"));
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StrSize = max(StrSize, (USHORT)MemSize);
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/* Size for the OBJECT_ATTRIBUTES */
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MemSize = ALIGN_UP(sizeof(OBJECT_ATTRIBUTES), sizeof(PVOID));
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/* Add the string size */
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MemSize += ALIGN_UP(sizeof(UNICODE_STRING), sizeof(PVOID));
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MemSize += StrSize;
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/* Allocate the memory in user-mode */
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Status = ZwAllocateVirtualMemory(ZwCurrentProcess(),
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(PVOID*)&ObjectAttributes,
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0,
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&MemSize,
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MEM_COMMIT,
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PAGE_READWRITE);
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if (!NT_SUCCESS(Status))
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{
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ERR("ZwAllocateVirtualMemory() failed, Status 0x%08lx\n", Status);
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goto Quit;
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}
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ObjectName = (PUNICODE_STRING)((ULONG_PTR)ObjectAttributes +
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ALIGN_UP(sizeof(OBJECT_ATTRIBUTES), sizeof(PVOID)));
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RtlInitEmptyUnicodeString(ObjectName,
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(PWCHAR)((ULONG_PTR)ObjectName +
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ALIGN_UP(sizeof(UNICODE_STRING), sizeof(PVOID))),
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StrSize);
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/* If we got an inherited window station handle, duplicate and use it */
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if (hWinSta)
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{
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ASSERT(bUseDefaultWinSta);
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/* Duplicate the handle if it belongs to another process than the current one */
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if (Process != PsGetCurrentProcess())
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{
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ASSERT(hProcess);
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Status = ZwDuplicateObject(hProcess,
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hWinSta,
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ZwCurrentProcess(),
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(PHANDLE)&hWinStaDup,
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0,
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0,
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DUPLICATE_SAME_ACCESS);
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if (!NT_SUCCESS(Status))
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{
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ERR("IntResolveDesktop: Failed to duplicate the window station handle, Status 0x%08lx\n", Status);
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/* We will use a default window station */
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hWinSta = NULL;
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}
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else
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{
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hWinSta = hWinStaDup;
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}
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}
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}
|
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/*
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* If we have an inherited window station, check whether
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* it is interactive and remember that for later.
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*/
|
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if (hWinSta)
|
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{
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ASSERT(bUseDefaultWinSta);
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/* Reference the inherited window station */
|
||||
Status = ObReferenceObjectByHandle(hWinSta,
|
||||
0,
|
||||
ExWindowStationObjectType,
|
||||
KernelMode,
|
||||
(PVOID*)&WinStaObject,
|
||||
NULL);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Failed to reference the inherited window station, Status 0x%08lx\n", Status);
|
||||
/* We will use a default window station */
|
||||
if (hWinStaDup)
|
||||
{
|
||||
ASSERT(hWinSta == hWinStaDup);
|
||||
ObCloseHandle(hWinStaDup, UserMode);
|
||||
hWinStaDup = NULL;
|
||||
}
|
||||
hWinSta = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
ERR("Process LUID is: 0x%x-%x, inherited window station LUID is: 0x%x-%x\n",
|
||||
ProcessLuid.HighPart, ProcessLuid.LowPart,
|
||||
WinStaObject->luidUser.HighPart, WinStaObject->luidUser.LowPart);
|
||||
|
||||
/* Check whether this window station is interactive, and remember it for later */
|
||||
bInteractive = !(WinStaObject->Flags & WSS_NOIO);
|
||||
|
||||
/* Dereference the window station */
|
||||
ObDereferenceObject(WinStaObject);
|
||||
}
|
||||
}
|
||||
|
||||
/* Build a valid window station name */
|
||||
Status = RtlStringCbPrintfW(ObjectName->Buffer,
|
||||
ObjectName->MaximumLength,
|
||||
L"%wZ\\%wZ",
|
||||
&gustrWindowStationsDir,
|
||||
&WinStaName);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Impossible to build a valid window station name, Status 0x%08lx\n", Status);
|
||||
goto Quit;
|
||||
}
|
||||
ObjectName->Length = (USHORT)(wcslen(ObjectName->Buffer) * sizeof(WCHAR));
|
||||
|
||||
TRACE("Parsed initial window station: '%wZ'\n", ObjectName);
|
||||
|
||||
/* Try to open the window station */
|
||||
InitializeObjectAttributes(ObjectAttributes,
|
||||
ObjectName,
|
||||
OBJ_CASE_INSENSITIVE,
|
||||
NULL,
|
||||
NULL);
|
||||
if (bInherit)
|
||||
ObjectAttributes->Attributes |= OBJ_INHERIT;
|
||||
|
||||
Status = ObOpenObjectByName(ObjectAttributes,
|
||||
ExWindowStationObjectType,
|
||||
UserMode,
|
||||
NULL,
|
||||
WINSTA_ACCESS_ALL,
|
||||
NULL,
|
||||
(PHANDLE)&hTempWinSta);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Failed to open the window station '%wZ', Status 0x%08lx\n", ObjectName, Status);
|
||||
}
|
||||
else
|
||||
{
|
||||
//
|
||||
// FIXME TODO: Perform a window station access check!!
|
||||
// If we fail AND bUseDefaultWinSta == FALSE we just quit.
|
||||
//
|
||||
|
||||
/*
|
||||
* Check whether we are opening the (single) interactive
|
||||
* window station, and if so, perform an access check.
|
||||
*/
|
||||
/* Check whether we are allowed to perform interactions */
|
||||
if (RtlEqualUnicodeString(&WinStaName, &WinSta0Name, TRUE))
|
||||
{
|
||||
LUID SystemLuid = SYSTEM_LUID;
|
||||
|
||||
/* Interactive window station: check for user LUID */
|
||||
WinStaObject = InputWindowStation;
|
||||
|
||||
Status = STATUS_ACCESS_DENIED;
|
||||
|
||||
// TODO: Check also that we compare wrt. window station WinSta0
|
||||
// which is the only one that can be interactive on the system.
|
||||
if (((!bUseDefaultWinSta || bInherit) && RtlEqualLuid(&ProcessLuid, &SystemLuid)) ||
|
||||
RtlEqualLuid(&ProcessLuid, &WinStaObject->luidUser))
|
||||
{
|
||||
/* We are interactive on this window station */
|
||||
bAccessAllowed = TRUE;
|
||||
Status = STATUS_SUCCESS;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Non-interactive window station: we have access since we were able to open it */
|
||||
bAccessAllowed = TRUE;
|
||||
Status = STATUS_SUCCESS;
|
||||
}
|
||||
}
|
||||
|
||||
/* If we failed, bail out if we were not trying to open the default window station */
|
||||
if (!NT_SUCCESS(Status) && !bUseDefaultWinSta) // if (!bAccessAllowed)
|
||||
goto Quit;
|
||||
|
||||
if (/* bAccessAllowed && */ bInteractive || !bAccessAllowed)
|
||||
{
|
||||
/*
|
||||
* Close WinSta0 if the inherited window station is interactive so that
|
||||
* we can use it, or we do not have access to the interactive WinSta0.
|
||||
*/
|
||||
ObCloseHandle(hTempWinSta, UserMode);
|
||||
hTempWinSta = NULL;
|
||||
}
|
||||
if (bInteractive == bAccessAllowed)
|
||||
{
|
||||
/* Keep using the inherited window station */
|
||||
NOTHING;
|
||||
}
|
||||
else // if (bInteractive != bAccessAllowed)
|
||||
{
|
||||
/*
|
||||
* Close the inherited window station, we will either keep using
|
||||
* the interactive WinSta0, or use Service-0xXXXX-YYYY$.
|
||||
*/
|
||||
if (hWinStaDup)
|
||||
{
|
||||
ASSERT(hWinSta == hWinStaDup);
|
||||
ObCloseHandle(hWinStaDup, UserMode);
|
||||
hWinStaDup = NULL;
|
||||
}
|
||||
hWinSta = hTempWinSta; // hTempWinSta is NULL in case bAccessAllowed == FALSE
|
||||
}
|
||||
|
||||
if (bUseDefaultWinSta)
|
||||
{
|
||||
if (hWinSta == NULL && !bInteractive)
|
||||
{
|
||||
/* Build a valid window station name from the LUID */
|
||||
Status = RtlStringCbPrintfW(ObjectName->Buffer,
|
||||
ObjectName->MaximumLength,
|
||||
L"%wZ\\Service-0x%x-%x$",
|
||||
&gustrWindowStationsDir,
|
||||
ProcessLuid.HighPart,
|
||||
ProcessLuid.LowPart);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Impossible to build a valid window station name, Status 0x%08lx\n", Status);
|
||||
goto Quit;
|
||||
}
|
||||
ObjectName->Length = (USHORT)(wcslen(ObjectName->Buffer) * sizeof(WCHAR));
|
||||
|
||||
/*
|
||||
* Create or open the non-interactive window station.
|
||||
* NOTE: The non-interactive window station handle is never inheritable.
|
||||
*/
|
||||
// FIXME: Set security!
|
||||
InitializeObjectAttributes(ObjectAttributes,
|
||||
ObjectName,
|
||||
OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
|
||||
NULL,
|
||||
NULL);
|
||||
|
||||
Status = IntCreateWindowStation(&hWinSta,
|
||||
ObjectAttributes,
|
||||
UserMode,
|
||||
KernelMode,
|
||||
MAXIMUM_ALLOWED,
|
||||
0, 0, 0, 0, 0);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ASSERT(hWinSta == NULL);
|
||||
ERR("Failed to create or open the non-interactive window station '%wZ', Status 0x%08lx\n",
|
||||
ObjectName, Status);
|
||||
goto Quit;
|
||||
}
|
||||
|
||||
//
|
||||
// FIXME: We might not need to always create or open the "Default"
|
||||
// desktop on the Service-0xXXXX-YYYY$ window station; we may need
|
||||
// to use another one....
|
||||
//
|
||||
|
||||
/* Create or open the Default desktop on the window station */
|
||||
Status = RtlStringCbCopyW(ObjectName->Buffer,
|
||||
ObjectName->MaximumLength,
|
||||
L"Default");
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Impossible to build a valid desktop name, Status 0x%08lx\n", Status);
|
||||
goto Quit;
|
||||
}
|
||||
ObjectName->Length = (USHORT)(wcslen(ObjectName->Buffer) * sizeof(WCHAR));
|
||||
|
||||
/* NOTE: The non-interactive desktop handle is never inheritable. */
|
||||
// FIXME: Set security!
|
||||
InitializeObjectAttributes(ObjectAttributes,
|
||||
ObjectName,
|
||||
OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
|
||||
hWinSta,
|
||||
NULL);
|
||||
|
||||
Status = IntCreateDesktop(&hDesktop,
|
||||
ObjectAttributes,
|
||||
UserMode,
|
||||
NULL,
|
||||
NULL,
|
||||
0,
|
||||
MAXIMUM_ALLOWED);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ASSERT(hDesktop == NULL);
|
||||
ERR("Failed to create or open the desktop '%wZ' on window station 0x%p, Status 0x%08lx\n",
|
||||
ObjectName, hWinSta, Status);
|
||||
}
|
||||
|
||||
goto Quit;
|
||||
}
|
||||
/*
|
||||
if (hWinSta == NULL)
|
||||
{
|
||||
Status = STATUS_UNSUCCESSFUL;
|
||||
goto Quit;
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
||||
/*
|
||||
* If we got an inherited desktop handle, duplicate and use it,
|
||||
* otherwise open a new desktop.
|
||||
*/
|
||||
if (hDesktop != NULL)
|
||||
{
|
||||
/* Duplicate the handle if it belongs to another process than the current one */
|
||||
if (Process != PsGetCurrentProcess())
|
||||
{
|
||||
ASSERT(hProcess);
|
||||
Status = ZwDuplicateObject(hProcess,
|
||||
hDesktop,
|
||||
ZwCurrentProcess(),
|
||||
(PHANDLE)&hDesktopDup,
|
||||
0,
|
||||
0,
|
||||
DUPLICATE_SAME_ACCESS);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("IntResolveDesktop: Failed to duplicate the desktop handle, Status 0x%08lx\n", Status);
|
||||
/* We will use a default desktop */
|
||||
hDesktop = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
hDesktop = hDesktopDup;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if ((hWinSta != NULL) && (hDesktop == NULL))
|
||||
{
|
||||
Status = RtlStringCbCopyNW(ObjectName->Buffer,
|
||||
ObjectName->MaximumLength,
|
||||
DesktopName.Buffer,
|
||||
DesktopName.Length);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("Impossible to build a valid desktop name, Status 0x%08lx\n", Status);
|
||||
goto Quit;
|
||||
}
|
||||
ObjectName->Length = (USHORT)(wcslen(ObjectName->Buffer) * sizeof(WCHAR));
|
||||
|
||||
TRACE("Parsed initial desktop: '%wZ'\n", ObjectName);
|
||||
|
||||
/* Open the desktop object */
|
||||
InitializeObjectAttributes(&ObjectAttributes,
|
||||
&ObjectName,
|
||||
InitializeObjectAttributes(ObjectAttributes,
|
||||
ObjectName,
|
||||
OBJ_CASE_INSENSITIVE,
|
||||
*hWinSta,
|
||||
hWinSta,
|
||||
NULL);
|
||||
if (bInherit)
|
||||
ObjectAttributes->Attributes |= OBJ_INHERIT;
|
||||
|
||||
Status = ObOpenObjectByName(&ObjectAttributes,
|
||||
Status = ObOpenObjectByName(ObjectAttributes,
|
||||
ExDesktopObjectType,
|
||||
KernelMode,
|
||||
UserMode,
|
||||
NULL,
|
||||
DESKTOP_ALL_ACCESS,
|
||||
NULL,
|
||||
(HANDLE*)hDesktop);
|
||||
|
||||
(PHANDLE)&hDesktop);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
*hDesktop = NULL;
|
||||
NtClose(*hWinSta);
|
||||
*hWinSta = NULL;
|
||||
SetLastNtError(Status);
|
||||
ERR("Failed to reference desktop %wZ PID: --!\n", &ObjectName);
|
||||
return Status;
|
||||
ERR("Failed to open the desktop '%wZ' on window station 0x%p, Status 0x%08lx\n",
|
||||
ObjectName, hWinSta, Status);
|
||||
goto Quit;
|
||||
}
|
||||
}
|
||||
return STATUS_SUCCESS;
|
||||
|
||||
Quit:
|
||||
/* Release the object attributes */
|
||||
if (ObjectAttributes)
|
||||
{
|
||||
MemSize = 0;
|
||||
ZwFreeVirtualMemory(ZwCurrentProcess(),
|
||||
(PVOID*)&ObjectAttributes,
|
||||
&MemSize,
|
||||
MEM_RELEASE);
|
||||
}
|
||||
|
||||
/* Close the temporary process handle */
|
||||
if (hProcess) // if (Process != PsGetCurrentProcess())
|
||||
ObCloseHandle(hProcess, KernelMode);
|
||||
|
||||
if (NT_SUCCESS(Status))
|
||||
{
|
||||
*phWinSta = hWinSta;
|
||||
*phDesktop = hDesktop;
|
||||
return STATUS_SUCCESS;
|
||||
}
|
||||
else
|
||||
{
|
||||
ERR("IntResolveDesktop(%wZ) failed, Status 0x%08lx\n", DesktopPath, Status);
|
||||
|
||||
if (hDesktopDup)
|
||||
ObCloseHandle(hDesktopDup, UserMode);
|
||||
if (hWinStaDup)
|
||||
ObCloseHandle(hWinStaDup, UserMode);
|
||||
|
||||
if (hDesktop)
|
||||
ObCloseHandle(hDesktop, UserMode);
|
||||
if (hWinSta)
|
||||
ObCloseHandle(hWinSta, UserMode);
|
||||
|
||||
SetLastNtError(Status);
|
||||
return Status;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
|
@ -2115,15 +2702,24 @@ NtUserPaintDesktop(HDC hDC)
|
|||
/*
|
||||
* NtUserResolveDesktop
|
||||
*
|
||||
* The NtUserResolveDesktop function retrieves handles to the desktop and
|
||||
* the window station specified by the desktop path string.
|
||||
* The NtUserResolveDesktop function attempts to retrieve valid handles to
|
||||
* a desktop and a window station suitable for the specified process.
|
||||
* The specified desktop path string is used only as a hint for the resolution.
|
||||
*
|
||||
* See the description of IntResolveDesktop for more details.
|
||||
*
|
||||
* Parameters
|
||||
* ProcessHandle
|
||||
* Handle to a user process.
|
||||
*
|
||||
* DesktopPath
|
||||
* The desktop path string.
|
||||
* The desktop path string used as a hint for desktop resolution.
|
||||
*
|
||||
* bInherit
|
||||
* Whether or not the returned handles are inheritable.
|
||||
*
|
||||
* phWinSta
|
||||
* Pointer to a window station handle.
|
||||
*
|
||||
* Return Value
|
||||
* Handle to the desktop (direct return value) and
|
||||
|
@ -2138,17 +2734,18 @@ NtUserPaintDesktop(HDC hDC)
|
|||
*/
|
||||
|
||||
HDESK
|
||||
APIENTRY
|
||||
NTAPI
|
||||
NtUserResolveDesktop(
|
||||
IN HANDLE ProcessHandle,
|
||||
IN PUNICODE_STRING DesktopPath,
|
||||
DWORD dwUnknown,
|
||||
IN BOOL bInherit,
|
||||
OUT HWINSTA* phWinSta)
|
||||
{
|
||||
NTSTATUS Status;
|
||||
PEPROCESS Process = NULL;
|
||||
PEPROCESS Process;
|
||||
HWINSTA hWinSta = NULL;
|
||||
HDESK hDesktop = NULL;
|
||||
UNICODE_STRING CapturedDesktopPath;
|
||||
|
||||
/* Allow only the Console Server to perform this operation (via CSRSS) */
|
||||
if (PsGetCurrentProcess() != gpepCSRSS)
|
||||
|
@ -2161,44 +2758,63 @@ NtUserResolveDesktop(
|
|||
UserMode,
|
||||
(PVOID*)&Process,
|
||||
NULL);
|
||||
if (!NT_SUCCESS(Status)) return NULL;
|
||||
if (!NT_SUCCESS(Status))
|
||||
return NULL;
|
||||
|
||||
// UserEnterShared();
|
||||
|
||||
_SEH2_TRY
|
||||
{
|
||||
UNICODE_STRING CapturedDesktopPath;
|
||||
|
||||
/* Capture the user desktop path string */
|
||||
Status = IntSafeCopyUnicodeStringTerminateNULL(&CapturedDesktopPath,
|
||||
DesktopPath);
|
||||
if (!NT_SUCCESS(Status)) _SEH2_YIELD(goto Quit);
|
||||
|
||||
/* Call the internal function */
|
||||
Status = IntParseDesktopPath(Process,
|
||||
&CapturedDesktopPath,
|
||||
&hWinSta,
|
||||
&hDesktop);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("IntParseDesktopPath failed, Status = 0x%08lx\n", Status);
|
||||
hWinSta = NULL;
|
||||
hDesktop = NULL;
|
||||
}
|
||||
|
||||
/* Return the window station handle */
|
||||
*phWinSta = hWinSta;
|
||||
|
||||
/* Free the captured string */
|
||||
if (CapturedDesktopPath.Buffer)
|
||||
ExFreePoolWithTag(CapturedDesktopPath.Buffer, TAG_STRING);
|
||||
/* Probe the handle pointer */
|
||||
// ProbeForWriteHandle
|
||||
ProbeForWrite(phWinSta, sizeof(HWINSTA), sizeof(HWINSTA));
|
||||
}
|
||||
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
|
||||
{
|
||||
Status = _SEH2_GetExceptionCode();
|
||||
_SEH2_YIELD(goto Quit);
|
||||
}
|
||||
_SEH2_END;
|
||||
|
||||
/* Capture the user desktop path string */
|
||||
Status = ProbeAndCaptureUnicodeString(&CapturedDesktopPath,
|
||||
UserMode,
|
||||
DesktopPath);
|
||||
if (!NT_SUCCESS(Status))
|
||||
goto Quit;
|
||||
|
||||
/* Call the internal function */
|
||||
Status = IntResolveDesktop(Process,
|
||||
&CapturedDesktopPath,
|
||||
bInherit,
|
||||
&hWinSta,
|
||||
&hDesktop);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR("IntResolveDesktop failed, Status 0x%08lx\n", Status);
|
||||
hWinSta = NULL;
|
||||
hDesktop = NULL;
|
||||
}
|
||||
|
||||
_SEH2_TRY
|
||||
{
|
||||
/* Return the window station handle */
|
||||
*phWinSta = hWinSta;
|
||||
}
|
||||
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
|
||||
{
|
||||
Status = _SEH2_GetExceptionCode();
|
||||
|
||||
/* We failed, close the opened desktop and window station */
|
||||
if (hDesktop) ObCloseHandle(hDesktop, UserMode);
|
||||
hDesktop = NULL;
|
||||
if (hWinSta) ObCloseHandle(hWinSta, UserMode);
|
||||
}
|
||||
_SEH2_END;
|
||||
|
||||
/* Free the captured string */
|
||||
ReleaseCapturedUnicodeString(&CapturedDesktopPath, UserMode);
|
||||
|
||||
Quit:
|
||||
// UserLeave();
|
||||
|
||||
|
|
|
@ -161,6 +161,15 @@ IntHideDesktop(PDESKTOP Desktop);
|
|||
BOOL IntSetThreadDesktop(IN HDESK hDesktop,
|
||||
IN BOOL FreeOnFailure);
|
||||
|
||||
NTSTATUS
|
||||
FASTCALL
|
||||
IntResolveDesktop(
|
||||
IN PEPROCESS Process,
|
||||
IN PUNICODE_STRING DesktopPath,
|
||||
IN BOOL bInherit,
|
||||
OUT HWINSTA* phWinSta,
|
||||
OUT HDESK* phDesktop);
|
||||
|
||||
NTSTATUS FASTCALL
|
||||
IntValidateDesktopHandle(
|
||||
HDESK Desktop,
|
||||
|
@ -179,12 +188,6 @@ IntCreateDesktop(
|
|||
IN DWORD dwFlags,
|
||||
IN ACCESS_MASK dwDesiredAccess);
|
||||
|
||||
NTSTATUS FASTCALL
|
||||
IntParseDesktopPath(PEPROCESS Process,
|
||||
PUNICODE_STRING DesktopPath,
|
||||
HWINSTA *hWinSta,
|
||||
HDESK *hDesktop);
|
||||
|
||||
VOID APIENTRY UserRedrawDesktop(VOID);
|
||||
BOOL IntRegisterShellHookWindow(HWND hWnd);
|
||||
BOOL IntDeRegisterShellHookWindow(HWND hWnd);
|
||||
|
|
|
@ -532,12 +532,12 @@ InitThreadCallback(PETHREAD Thread)
|
|||
|
||||
ptiCurrent->TIF_flags &= ~TIF_INCLEANUP;
|
||||
|
||||
// FIXME: Flag SYSTEM threads with... TIF_SYSTEMTHREAD !!
|
||||
|
||||
/* CSRSS threads have some special features */
|
||||
if (Process == gpepCSRSS)
|
||||
ptiCurrent->TIF_flags = TIF_CSRSSTHREAD | TIF_DONTATTACHQUEUE;
|
||||
|
||||
// FIXME: Flag SYSTEM threads with... TIF_SYSTEMTHREAD !!
|
||||
|
||||
ptiCurrent->pcti = &ptiCurrent->cti;
|
||||
|
||||
/* Initialize the CLIENTINFO */
|
||||
|
@ -570,9 +570,16 @@ InitThreadCallback(PETHREAD Thread)
|
|||
}
|
||||
}
|
||||
|
||||
/* Assign a default window station and desktop to the process */
|
||||
/* Do not try to open a desktop or window station before winlogon initializes */
|
||||
if (ptiCurrent->ppi->hdeskStartup == NULL && gpidLogon != 0)
|
||||
/*
|
||||
* Assign a default window station and desktop to the process.
|
||||
* Do not try to open a desktop or window station before the very first
|
||||
* (interactive) window station has been created by Winlogon.
|
||||
*/
|
||||
// if (ptiCurrent->ppi->hdeskStartup == NULL && InputWindowStation != NULL)
|
||||
/* Last things to do only if we are not a SYSTEM or CSRSS thread */
|
||||
if (!(ptiCurrent->TIF_flags & (TIF_SYSTEMTHREAD | TIF_CSRSSTHREAD)) &&
|
||||
/**/ptiCurrent->ppi->hdeskStartup == NULL &&/**/
|
||||
InputWindowStation != NULL)
|
||||
{
|
||||
HWINSTA hWinSta = NULL;
|
||||
HDESK hDesk = NULL;
|
||||
|
@ -580,8 +587,8 @@ InitThreadCallback(PETHREAD Thread)
|
|||
PDESKTOP pdesk;
|
||||
|
||||
/*
|
||||
* inherit the thread desktop and process window station (if not yet inherited) from the process startup
|
||||
* info structure. See documentation of CreateProcess()
|
||||
* Inherit the thread desktop and process window station (if not yet inherited)
|
||||
* from the process startup info structure. See documentation of CreateProcess().
|
||||
*/
|
||||
|
||||
Status = STATUS_UNSUCCESSFUL;
|
||||
|
@ -594,17 +601,18 @@ InitThreadCallback(PETHREAD Thread)
|
|||
RtlInitUnicodeString(&DesktopPath, NULL);
|
||||
}
|
||||
|
||||
Status = IntParseDesktopPath(Process,
|
||||
&DesktopPath,
|
||||
&hWinSta,
|
||||
&hDesk);
|
||||
Status = IntResolveDesktop(Process,
|
||||
&DesktopPath,
|
||||
FALSE,
|
||||
&hWinSta,
|
||||
&hDesk);
|
||||
|
||||
if (DesktopPath.Buffer)
|
||||
ExFreePoolWithTag(DesktopPath.Buffer, TAG_STRING);
|
||||
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
ERR_CH(UserThread, "Failed to assign default dekstop and winsta to process\n");
|
||||
ERR_CH(UserThread, "Failed to assign default desktop and winsta to process\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
|
@ -615,7 +623,7 @@ InitThreadCallback(PETHREAD Thread)
|
|||
goto error;
|
||||
}
|
||||
|
||||
/* Validate the new desktop. */
|
||||
/* Validate the new desktop */
|
||||
Status = IntValidateDesktopHandle(hDesk, UserMode, 0, &pdesk);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
|
@ -624,6 +632,8 @@ InitThreadCallback(PETHREAD Thread)
|
|||
}
|
||||
|
||||
/* Store the parsed desktop as the initial desktop */
|
||||
ASSERT(ptiCurrent->ppi->hdeskStartup == NULL);
|
||||
ASSERT(Process->UniqueProcessId != gpidLogon);
|
||||
ptiCurrent->ppi->hdeskStartup = hDesk;
|
||||
ptiCurrent->ppi->rpdeskStartup = pdesk;
|
||||
}
|
||||
|
|
|
@ -324,7 +324,7 @@ GuiInit(IN PCONSOLE_INIT_INFO ConsoleInitInfo,
|
|||
|
||||
hDesk = NtUserResolveDesktop(ConsoleLeaderProcessHandle,
|
||||
&DesktopPath,
|
||||
0,
|
||||
FALSE,
|
||||
&hWinSta);
|
||||
DPRINT("NtUserResolveDesktop(DesktopPath = '%wZ') returned hDesk = 0x%p; hWinSta = 0x%p\n",
|
||||
&DesktopPath, hDesk, hWinSta);
|
||||
|
|
Loading…
Reference in a new issue