800 lines
24 KiB
C++
800 lines
24 KiB
C++
// --------------------------------------------------------------------------
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// Module Name: ThemeServer.cpp
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//
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// Copyright (c) 2000, Microsoft Corporation
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//
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// Functions that implement server functionality. Functions in this file
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// cannot execute per instance win32k functions that are done on the client's
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// behalf. That work must be done on the client side.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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#include "stdafx.h"
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#include "ThemeServer.h"
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#include <shfolder.h>
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#include "Loader.h"
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#include "Signing.h"
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#include "ThemeSection.h"
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#include "TmUtils.h"
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#include "sethook.h"
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#include "log.h"
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#include "services.h"
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#include <UxThemeServer.h>
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#define TBOOL(x) ((BOOL)(x))
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#define TW32(x) ((DWORD)(x))
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#define THR(x) ((HRESULT)(x))
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#define TSTATUS(x) ((NTSTATUS)(x))
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#define goto !!DO NOT USE GOTO!! - DO NOT REMOVE THIS ON PAIN OF DEATH
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// --------------------------------------------------------------------------
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// CThemeServer::CThemeServer
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//
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// Arguments: hProcessRegisterHook = Process used to install hooks.
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// dwServerChangeNumber = Server change number.
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// pfnRegister = Address of install hook function.
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// pfnUnregister = Address of remove hook function.
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// pfnClearStockObjects = Address of function to remove stock objects from section
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//
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// Returns: <none>
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//
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// Purpose: Constructor for CThemeServer. Initializes member variables
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// with information relevant for the session. Keeps a handle to
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// the process that called this to use to inject threads in to
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// handle hook installation and removal.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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CThemeServer::CThemeServer (HANDLE hProcessRegisterHook, DWORD dwServerChangeNumber, void *pfnRegister, void *pfnUnregister, void *pfnClearStockObjects, DWORD dwStackSizeReserve, DWORD dwStackSizeCommit) :
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_hProcessRegisterHook(NULL),
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_dwServerChangeNumber(dwServerChangeNumber),
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_pfnRegister(pfnRegister),
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_pfnUnregister(pfnUnregister),
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_pfnClearStockObjects(pfnClearStockObjects),
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_dwStackSizeReserve(dwStackSizeReserve),
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_dwStackSizeCommit(dwStackSizeCommit),
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_dwSessionID(NtCurrentPeb()->SessionId),
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_fHostHooksSet(false),
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_hSectionGlobalTheme(NULL),
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_dwClientChangeNumber(0)
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{
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ULONG ulReturnLength;
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PROCESS_SESSION_INFORMATION processSessionInformation;
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InitializeCriticalSection(&_lock);
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TBOOL(DuplicateHandle(GetCurrentProcess(),
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hProcessRegisterHook,
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GetCurrentProcess(),
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&_hProcessRegisterHook,
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0,
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FALSE,
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DUPLICATE_SAME_ACCESS));
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if (NT_SUCCESS(NtQueryInformationProcess(hProcessRegisterHook,
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ProcessSessionInformation,
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&processSessionInformation,
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sizeof(processSessionInformation),
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&ulReturnLength)))
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{
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_dwSessionID = processSessionInformation.SessionId;
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}
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}
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// --------------------------------------------------------------------------
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// CThemeServer::~CThemeServer
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//
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// Arguments: <none>
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//
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// Returns: <none>
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//
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// Purpose: Destructor for CThemeServer. Releases resources used.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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CThemeServer::~CThemeServer (void)
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{
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//---- important: turn off hooks so everyone gets unthemed ----
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if (!GetSystemMetrics(SM_SHUTTINGDOWN)) // Don't do this on shutdown to keep winlogon themed
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{
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ThemeHooksOff();
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}
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//---- mark global theme invalid & release it ----
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if (_hSectionGlobalTheme != NULL)
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{
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SetGlobalTheme(NULL);
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}
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if (_hProcessRegisterHook != NULL)
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{
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TBOOL(CloseHandle(_hProcessRegisterHook));
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_hProcessRegisterHook = NULL;
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}
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DeleteCriticalSection(&_lock);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::ThemeHooksOn
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//
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// Arguments: <none>
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//
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// Returns: HRESULT
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//
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// Purpose: Install theme hooks via the session controlling process.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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HRESULT CThemeServer::ThemeHooksOn (void)
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{
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HRESULT hr;
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LockAcquire();
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if (!_fHostHooksSet)
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{
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if (ClassicGetSystemMetrics(SM_CLEANBOOT) == 0)
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{
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if (_hProcessRegisterHook != NULL)
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{
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hr = InjectClientSessionThread(_hProcessRegisterHook, FunctionRegisterUserApiHook, NULL);
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_fHostHooksSet = SUCCEEDED(hr);
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}
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else
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{
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hr = MakeError32(ERROR_SERVICE_REQUEST_TIMEOUT);
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}
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}
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else
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{
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hr = MakeError32(ERROR_BAD_ENVIRONMENT); // themes not allowed in safe mode
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}
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}
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else
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{
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hr = S_OK;
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}
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LockRelease();
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return(hr);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::ThemeHooksOff
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//
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// Arguments: <none>
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//
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// Returns: HRESULT
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//
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// Purpose: Remove theme hooks via the session controlling process.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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HRESULT CThemeServer::ThemeHooksOff (void)
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{
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LockAcquire();
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if (_fHostHooksSet)
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{
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_fHostHooksSet = false;
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if (_hProcessRegisterHook != NULL)
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{
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THR(InjectClientSessionThread(_hProcessRegisterHook, FunctionUnregisterUserApiHook, NULL));
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}
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}
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LockRelease();
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return(S_OK);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::AreThemeHooksActive
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//
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// Arguments: <none>
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//
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// Returns: bool
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//
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// Purpose: Returns whether theme hooks have been successfully installed.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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bool CThemeServer::AreThemeHooksActive (void)
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{
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bool fResult;
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LockAcquire();
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fResult = _fHostHooksSet;
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LockRelease();
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return(fResult);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::GetCurrentChangeNumber
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//
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// Arguments: <none>
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//
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// Returns: int
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//
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// Purpose: Returns the current change number.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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int CThemeServer::GetCurrentChangeNumber (void)
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{
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int iCurrentChangeNumber;
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LockAcquire();
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iCurrentChangeNumber = static_cast<int>((_dwServerChangeNumber << 16) | _dwClientChangeNumber);
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LockRelease();
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Log(LOG_TMCHANGE, L"GetCurrentChangeNumber: server: %d, client: %d, change: 0x%x",
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_dwServerChangeNumber, _dwClientChangeNumber, iCurrentChangeNumber);
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return(iCurrentChangeNumber);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::GetNewChangeNumber
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//
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// Arguments: <none>
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//
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// Returns: int
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//
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// Purpose: Returns a new change number.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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int CThemeServer::GetNewChangeNumber (void)
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{
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int iCurrentChangeNumber;
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LockAcquire();
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_dwClientChangeNumber = static_cast<WORD>(_dwClientChangeNumber + 1);
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iCurrentChangeNumber = static_cast<int>((_dwServerChangeNumber << 16) | _dwClientChangeNumber);
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Log(LOG_TMLOAD, L"GetNewChangeNumber: server: %d, client: %d, change: 0x%x",
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_dwServerChangeNumber, _dwClientChangeNumber, iCurrentChangeNumber);
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LockRelease();
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return(iCurrentChangeNumber);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::SetGlobalTheme
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//
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// Arguments: hSection = Handle to section of new theme.
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//
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// Returns: HRESULT
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//
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// Purpose: Invalidates the old section and closes the handle to it.
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// Validates the new section and if valid sets it as the global
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// theme.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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HRESULT CThemeServer::SetGlobalTheme (HANDLE hSection)
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{
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HRESULT hr;
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LockAcquire();
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if (_hSectionGlobalTheme != NULL)
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{
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void *pV;
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HANDLE hSemaphore = NULL;
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// Before closing the section invalidate it.
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pV = MapViewOfFile(_hSectionGlobalTheme,
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FILE_MAP_WRITE,
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0,
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0,
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0);
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if (pV != NULL)
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{
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// Create a semaphore so that nobody will try to clean it before us, which would result in a double free
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// (as soon as we clear SECTION_GLOBAL, various CUxThemeFile destructors can call ClearStockObjects)
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WCHAR szName[64];
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wsprintf(szName, L"Global\\ClearStockGlobal%d-%d", reinterpret_cast<THEMEHDR*>(pV)->iLoadId, _dwSessionID);
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hSemaphore = CreateSemaphore(NULL, 0, 1, szName);
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Log(LOG_TMLOAD, L"SetGlobalTheme clearing section %d, semaphore=%s, hSemaphore=%X, gle=%d", reinterpret_cast<THEMEHDR*>(pV)->iLoadId, szName, hSemaphore, GetLastError());
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reinterpret_cast<THEMEHDR*>(pV)->dwFlags &= ~(SECTION_READY | SECTION_GLOBAL);
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}
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#ifdef DEBUG
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if (LogOptionOn(LO_TMLOAD))
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{
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// Unexpected failure
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ASSERT(pV != NULL);
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}
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#endif
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HANDLE hSectionForInjection = NULL;
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//---- create a handle for CLIENT process to use to clear stock bitmaps ----
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if (DuplicateHandle(GetCurrentProcess(),
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_hSectionGlobalTheme,
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_hProcessRegisterHook,
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&hSectionForInjection,
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FILE_MAP_READ,
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FALSE,
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0) != FALSE)
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{
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// This will close the handle
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THR(InjectClientSessionThread(_hProcessRegisterHook, FunctionClearStockObjects, hSectionForInjection));
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}
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if (pV != NULL)
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{
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reinterpret_cast<THEMEHDR*>(pV)->dwFlags &= ~SECTION_HASSTOCKOBJECTS;
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if (hSemaphore != NULL)
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{
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CloseHandle(hSemaphore);
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}
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TBOOL(UnmapViewOfFile(pV));
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}
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TBOOL(CloseHandle(_hSectionGlobalTheme));
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_hSectionGlobalTheme = NULL;
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}
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if (hSection != NULL)
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{
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CThemeSection themeSection;
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hr = themeSection.Open(hSection);
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if (SUCCEEDED(hr))
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{
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hr = themeSection.ValidateData(true);
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}
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if (SUCCEEDED(hr))
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{
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if (DuplicateHandle(GetCurrentProcess(),
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hSection,
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GetCurrentProcess(),
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&_hSectionGlobalTheme,
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FILE_MAP_ALL_ACCESS,
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FALSE,
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0) != FALSE)
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{
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hr = S_OK;
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}
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else
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{
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hr = MakeErrorLast();
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}
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}
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}
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else
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{
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hr = S_OK;
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}
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if (SUCCEEDED(hr))
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{
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//---- bump the change number at the same time so everything is in sync. ----
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int iChangeNum = GetNewChangeNumber();
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if (_hSectionGlobalTheme)
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{
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//---- put changenum into theme hdr to help client keep things straight ----
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VOID *pv = MapViewOfFile(_hSectionGlobalTheme,
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FILE_MAP_WRITE,
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0,
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0,
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0);
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if (pv != NULL)
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{
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reinterpret_cast<THEMEHDR*>(pv)->dwFlags |= SECTION_GLOBAL;
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reinterpret_cast<THEMEHDR*>(pv)->iLoadId = iChangeNum;
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Log(LOG_TMLOAD, L"SetGlobalTheme: new section is %d", reinterpret_cast<THEMEHDR*>(pv)->iLoadId);
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TBOOL(UnmapViewOfFile(pv));
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}
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}
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}
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LockRelease();
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return(hr);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::GetGlobalTheme
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//
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// Arguments: phSection = Handle to the section received.
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//
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// Returns: HRESULT
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//
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// Purpose: Duplicates the section back to the caller.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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HRESULT CThemeServer::GetGlobalTheme (HANDLE *phSection)
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{
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HRESULT hr;
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LockAcquire();
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*phSection = NULL;
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if (_hSectionGlobalTheme != NULL)
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{
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if (DuplicateHandle(GetCurrentProcess(),
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_hSectionGlobalTheme,
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GetCurrentProcess(),
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phSection,
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0,
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FALSE,
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DUPLICATE_SAME_ACCESS) != FALSE)
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{
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hr = S_OK;
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}
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else
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{
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hr = MakeErrorLast();
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}
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}
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else
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{
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hr = S_OK;
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}
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LockRelease();
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return(hr);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::LoadTheme
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//
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// Arguments: hSection = Section created by the client.
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// phSection = Section created by the server returned.
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// pszName = Theme name.
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// pszColor = Theme size.
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// pszSize = Theme color.
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//
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// Returns: HRESULT
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//
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// Purpose: Creates a new section in the server context based on the
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// section from the client. The contents are transferred across.
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// The section contents are also strictly verified.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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HRESULT CThemeServer::LoadTheme (HANDLE hSection, HANDLE *phSection, LPCWSTR pszName, LPCWSTR pszColor, LPCWSTR pszSize)
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{
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HRESULT hr;
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hr = CheckThemeSignature(pszName); // Check this is signed
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if (SUCCEEDED(hr))
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{
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CThemeSection themeSectionIn;
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if (SUCCEEDED(themeSectionIn.Open(hSection)))
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{
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if (ThemeMatch(themeSectionIn, pszName, pszColor, pszSize, 0) != FALSE)
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{
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hr = themeSectionIn.ValidateData(true);
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if (SUCCEEDED(hr))
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{
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CThemeSection themeSectionOut;
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// Note: we come here impersonating the user, we need for ThemeMatch.
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// However the theme section must be created in the system context, so that only
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// the system context has write access to it. We revert to self here based on the
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// knowledge that nothing after this call needs to be done in the user context.
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RevertToSelf();
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hr = themeSectionOut.CreateFromSection(hSection);
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if (SUCCEEDED(hr))
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{
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*phSection = themeSectionOut.Get(); // We now own the handle
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}
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}
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}
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else
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{
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hr = E_ACCESSDENIED;
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}
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}
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}
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return(hr);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::IsSystemProcessContext
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//
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// Arguments: <none>
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//
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// Returns: bool
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//
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// Purpose: Is the current process executing in the SYSTEM context?
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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bool CThemeServer::IsSystemProcessContext (void)
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{
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bool fResult;
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HANDLE hToken;
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fResult = false;
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if (OpenProcessToken(GetCurrentProcess(),
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TOKEN_QUERY,
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&hToken) != FALSE)
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{
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static const LUID sLUIDSystem = SYSTEM_LUID;
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ULONG ulReturnLength;
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TOKEN_STATISTICS tokenStatistics;
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fResult = ((GetTokenInformation(hToken,
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TokenStatistics,
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&tokenStatistics,
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sizeof(tokenStatistics),
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&ulReturnLength) != FALSE) &&
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RtlEqualLuid(&tokenStatistics.AuthenticationId, &sLUIDSystem));
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TBOOL(CloseHandle(hToken));
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}
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return(fResult);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::ThemeHooksInstall
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//
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// Arguments: <none>
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//
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// Returns: DWORD
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//
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// Purpose: Thread entry point for injected thread running in session
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// creating process' context to call user32!RegisterUserApiHook.
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//
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// History: 2000-11-11 vtan created
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// --------------------------------------------------------------------------
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DWORD CThemeServer::ThemeHooksInstall (void)
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{
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DWORD dwErrorCode;
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if (IsSystemProcessContext())
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{
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INITUSERAPIHOOK pfnInitUserApiHook = ThemeInitApiHook;
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if (RegisterUserApiHook(g_hInst, pfnInitUserApiHook) != FALSE)
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{
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dwErrorCode = ERROR_SUCCESS;
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}
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else
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{
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dwErrorCode = GetLastError();
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}
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}
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else
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{
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dwErrorCode = ERROR_ACCESS_DENIED;
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}
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return(dwErrorCode);
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}
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// --------------------------------------------------------------------------
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// CThemeServer::ThemeHooksRemove
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: DWORD
|
|
//
|
|
// Purpose: Thread entry point for injected thread running in session
|
|
// creating process' context to call
|
|
// user32!UnregisterUserApiHook.
|
|
//
|
|
// History: 2000-11-11 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
DWORD CThemeServer::ThemeHooksRemove (void)
|
|
|
|
{
|
|
DWORD dwErrorCode;
|
|
|
|
if (IsSystemProcessContext())
|
|
{
|
|
if (UnregisterUserApiHook() != FALSE)
|
|
{
|
|
dwErrorCode = ERROR_SUCCESS;
|
|
|
|
Log(LOG_TMLOAD, L"UnregisterUserApiHook() called");
|
|
}
|
|
else
|
|
{
|
|
dwErrorCode = GetLastError();
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
dwErrorCode = ERROR_ACCESS_DENIED;
|
|
}
|
|
return(dwErrorCode);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CThemeServer::ClearStockObjects
|
|
//
|
|
// Arguments: HANDLE hSection
|
|
//
|
|
// Returns: DWORD
|
|
//
|
|
// Purpose: Thread entry point for injected thread running in session
|
|
// creating process' context to clear stock objects in theme
|
|
// section.
|
|
//
|
|
//
|
|
// History: 2001-05-01 rfernand created
|
|
// --------------------------------------------------------------------------
|
|
|
|
DWORD CThemeServer::ClearStockObjects (HANDLE hSection)
|
|
|
|
{
|
|
DWORD dwErrorCode = ERROR_SUCCESS;
|
|
|
|
if (IsSystemProcessContext())
|
|
{
|
|
if (hSection)
|
|
{
|
|
//---- Clearing the stock bitmaps in the section ----
|
|
//---- is OK here since we are running in the context ----
|
|
//---- of the current USER session ----
|
|
|
|
HRESULT hr = ClearTheme(hSection, TRUE);
|
|
if (FAILED(hr))
|
|
{
|
|
Log(LOG_ALWAYS, L"ClearTheme() failed, hr=0x%x", hr);
|
|
hr = S_OK; // not a fatal error
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dwErrorCode = ERROR_ACCESS_DENIED;
|
|
}
|
|
return(dwErrorCode);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CThemeServer::LockAcquire
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Acquires the object critical section.
|
|
//
|
|
// History: 2000-11-11 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
void CThemeServer::LockAcquire (void)
|
|
|
|
{
|
|
EnterCriticalSection(&_lock);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CThemeServer::LockRelease
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Releases the object critical section.
|
|
//
|
|
// History: 2000-11-11 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
void CThemeServer::LockRelease (void)
|
|
|
|
{
|
|
LeaveCriticalSection(&_lock);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CThemeServer::InjectClientSessionThread
|
|
//
|
|
// Arguments: hProcess = Handle to process to inject thread in.
|
|
// iIndexFunction = Function to call on injected thread.
|
|
// pvParam = Ptr to param for entry function
|
|
//
|
|
// Returns: HRESULT
|
|
//
|
|
// Purpose: Create a user mode thread in the remote process (possibly
|
|
// across sessions) and execute the entry point specified at
|
|
// object construction which is valid in the remote process
|
|
// context. Wait for the thread to finish. It will signal its
|
|
// success of failure in the exit code.
|
|
//
|
|
// History: 2000-11-11 vtan created
|
|
// 2001-05-18 vtan generic function index
|
|
// --------------------------------------------------------------------------
|
|
|
|
HRESULT CThemeServer::InjectClientSessionThread (HANDLE hProcess, int iIndexFunction, void *pvParam)
|
|
|
|
{
|
|
HRESULT hr;
|
|
PUSER_THREAD_START_ROUTINE pfnThreadStart;
|
|
|
|
switch (iIndexFunction)
|
|
{
|
|
case FunctionRegisterUserApiHook:
|
|
pfnThreadStart = reinterpret_cast<PUSER_THREAD_START_ROUTINE>(_pfnRegister);
|
|
break;
|
|
case FunctionUnregisterUserApiHook:
|
|
pfnThreadStart = reinterpret_cast<PUSER_THREAD_START_ROUTINE>(_pfnUnregister);
|
|
break;
|
|
case FunctionClearStockObjects:
|
|
pfnThreadStart = reinterpret_cast<PUSER_THREAD_START_ROUTINE>(_pfnClearStockObjects);
|
|
break;
|
|
default:
|
|
pfnThreadStart = NULL;
|
|
break;
|
|
}
|
|
if (pfnThreadStart != NULL)
|
|
{
|
|
NTSTATUS status;
|
|
HANDLE hThread;
|
|
|
|
status = RtlCreateUserThread(hProcess,
|
|
NULL,
|
|
FALSE,
|
|
0,
|
|
_dwStackSizeReserve,
|
|
_dwStackSizeCommit,
|
|
pfnThreadStart,
|
|
pvParam,
|
|
&hThread,
|
|
NULL);
|
|
if (NT_SUCCESS(status))
|
|
{
|
|
DWORD dwWaitResult, dwExitCode;
|
|
|
|
dwWaitResult = WaitForSingleObject(hThread, INFINITE);
|
|
if (GetExitCodeThread(hThread, &dwExitCode) != FALSE)
|
|
{
|
|
hr = HRESULT_FROM_WIN32(dwExitCode);
|
|
}
|
|
else
|
|
{
|
|
hr = E_FAIL;
|
|
}
|
|
TBOOL(CloseHandle(hThread));
|
|
}
|
|
else
|
|
{
|
|
hr = HRESULT_FROM_NT(status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
hr = E_FAIL;
|
|
}
|
|
return(hr);
|
|
}
|
|
|