You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
383 lines
14 KiB
383 lines
14 KiB
#include "shellprv.h"
|
|
#pragma hdrstop
|
|
|
|
// this makes sure the DLL for the given clsid stays in memory
|
|
// this is needed because we violate COM rules and hold apparment objects
|
|
// across the lifetime of appartment threads. these objects really need
|
|
// to be free threaded (we have always treated them as such)
|
|
|
|
STDAPI_(HINSTANCE) SHPinDllOfCLSIDStr(LPCTSTR pszCLSID)
|
|
{
|
|
CLSID clsid;
|
|
|
|
SHCLSIDFromString(pszCLSID, &clsid);
|
|
return SHPinDllOfCLSID(&clsid);
|
|
}
|
|
|
|
// translate string form of CLSID into binary form
|
|
|
|
STDAPI SHCLSIDFromString(LPCTSTR psz, CLSID *pclsid)
|
|
{
|
|
*pclsid = CLSID_NULL;
|
|
if (psz == NULL)
|
|
return NOERROR;
|
|
return GUIDFromString(psz, pclsid) ? NOERROR : CO_E_CLASSSTRING;
|
|
}
|
|
|
|
BOOL _IsShellDll(LPCTSTR pszDllPath)
|
|
{
|
|
LPCTSTR pszDllName = PathFindFileName(pszDllPath);
|
|
return lstrcmpi(pszDllName, TEXT("shell32.dll")) == 0;
|
|
}
|
|
|
|
HKEY g_hklmApprovedExt = (HKEY)-1; // not tested yet
|
|
|
|
// On NT, we must check to ensure that this CLSID exists in
|
|
// the list of approved CLSIDs that can be used in-process.
|
|
// If not, we fail the creation with ERROR_ACCESS_DENIED.
|
|
// We explicitly allow anything serviced by this DLL
|
|
|
|
BOOL _IsShellExtApproved(LPCTSTR pszClass, LPCTSTR pszDllPath)
|
|
{
|
|
BOOL fIsApproved = TRUE;
|
|
|
|
ASSERT(!_IsShellDll(pszDllPath));
|
|
|
|
#ifdef FULL_DEBUG
|
|
if (TRUE)
|
|
#else
|
|
if (SHRestricted(REST_ENFORCESHELLEXTSECURITY))
|
|
#endif
|
|
{
|
|
if (g_hklmApprovedExt == (HKEY)-1)
|
|
{
|
|
g_hklmApprovedExt = NULL;
|
|
RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved"), 0, KEY_READ, &g_hklmApprovedExt);
|
|
}
|
|
|
|
if (g_hklmApprovedExt)
|
|
{
|
|
fIsApproved = SHQueryValueEx(g_hklmApprovedExt, pszClass, 0, NULL, NULL, NULL) == ERROR_SUCCESS;
|
|
if (!fIsApproved)
|
|
{
|
|
HKEY hk;
|
|
if (RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved"), 0, KEY_READ, &hk) == ERROR_SUCCESS)
|
|
{
|
|
fIsApproved = SHQueryValueEx(hk, pszClass, 0, NULL, NULL, NULL) == ERROR_SUCCESS;
|
|
RegCloseKey(hk);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef FULL_DEBUG
|
|
if (!SHRestricted(REST_ENFORCESHELLEXTSECURITY) && !fIsApproved)
|
|
{
|
|
TraceMsg(TF_WARNING, "%s not approved; fortunately, shell security is disabled", pszClass);
|
|
fIsApproved = TRUE;
|
|
}
|
|
#endif
|
|
return fIsApproved;
|
|
}
|
|
|
|
STDAPI_(BOOL) IsGuimodeSetupRunning()
|
|
{
|
|
DWORD dwSystemSetupInProgress;
|
|
DWORD dwMiniSetupInProgress;
|
|
DWORD dwType;
|
|
DWORD dwSize;
|
|
|
|
dwSize = sizeof(dwSystemSetupInProgress);
|
|
if ((SHGetValueW(HKEY_LOCAL_MACHINE, L"SYSTEM\\Setup", L"SystemSetupInProgress", &dwType, (LPVOID)&dwSystemSetupInProgress, &dwSize) == ERROR_SUCCESS) &&
|
|
(dwType == REG_DWORD) &&
|
|
(dwSystemSetupInProgress != 0))
|
|
{
|
|
|
|
// starting w/ whistler on a syspreped machine the SystemSetupInProgress will be set EVEN AFTER guimode setup
|
|
// has finished (needed for OOBE on the boot after guimode finishes). So, to distinguish the "first-boot" case
|
|
// from the "guimode-setup" case we check the MiniSetupInProgress value as well.
|
|
|
|
dwSize = sizeof(dwMiniSetupInProgress);
|
|
if ((SHGetValueW(HKEY_LOCAL_MACHINE, L"SYSTEM\\Setup", L"MiniSetupInProgress", &dwType, (LPVOID)&dwMiniSetupInProgress, &dwSize) != ERROR_SUCCESS) ||
|
|
(dwType != REG_DWORD) ||
|
|
(dwMiniSetupInProgress == 0))
|
|
{
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
typedef HRESULT (__stdcall *PFNDLLGETCLASSOBJECT)(REFCLSID rclsid, REFIID riid, void **ppv);
|
|
|
|
HRESULT _CreateFromDllGetClassObject(PFNDLLGETCLASSOBJECT pfn, const CLSID *pclsid, IUnknown *punkOuter, REFIID riid, void **ppv)
|
|
{
|
|
IClassFactory *pcf;
|
|
HRESULT hr = pfn(pclsid, &IID_IClassFactory, &pcf);
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
hr = pcf->lpVtbl->CreateInstance(pcf, punkOuter, riid, ppv);
|
|
#ifdef DEBUG
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
// confirm that OLE can create this object to
|
|
// make sure our objects are really CoCreateable
|
|
IUnknown *punk;
|
|
HRESULT hrTemp = CoCreateInstance(pclsid, punkOuter, CLSCTX_INPROC_SERVER, riid, &punk);
|
|
if (SUCCEEDED(hrTemp))
|
|
punk->lpVtbl->Release(punk);
|
|
else
|
|
{
|
|
if (hrTemp == CO_E_NOTINITIALIZED)
|
|
{
|
|
// shell32.dll works without com being inited
|
|
TraceMsg(TF_WARNING, "shell32 or friend object used without COM being initalized");
|
|
}
|
|
// the RIPMSG below was hitting too often in out-of-memory cases where lame class factories return E_FAIL, E_NOTIMPL, and a bunch of
|
|
// other meaningless error codes. I have therefore relegaed this ripmsg to FULL_DEBUG only status.
|
|
#ifdef FULL_DEBUG
|
|
else if ((hrTemp != E_OUTOFMEMORY) && // stress can hit the E_OUTOFMEMORY case
|
|
(hrTemp != E_NOINTERFACE) && // stress can hit the E_NOINTERFACE case
|
|
(hrTemp != HRESULT_FROM_WIN32(ERROR_COMMITMENT_LIMIT)) && // stress can hit the ERROR_COMMITMENT_LIMIT case
|
|
(hrTemp != HRESULT_FROM_WIN32(ERROR_NO_SYSTEM_RESOURCES)) && // stress can hit the ERROR_NO_SYSTEM_RESOURCES case
|
|
!IsGuimodeSetupRunning()) // and we don't want to fire the assert during guimode (shell32 might not be registered yet)
|
|
{
|
|
// others failures are bad
|
|
RIPMSG(FALSE, "CoCreate failed with %x", hrTemp);
|
|
}
|
|
#endif // FULL_DEBUG
|
|
}
|
|
}
|
|
#endif
|
|
pcf->lpVtbl->Release(pcf);
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
|
|
HRESULT _CreateFromShell(const CLSID *pclsid, IUnknown *punkOuter, REFIID riid, void **ppv)
|
|
{
|
|
return _CreateFromDllGetClassObject(DllGetClassObject, pclsid, punkOuter, riid, ppv);
|
|
}
|
|
|
|
HRESULT _CreateFromDll(LPCTSTR pszDllPath, const CLSID *pclsid, IUnknown *punkOuter, REFIID riid, void **ppv)
|
|
{
|
|
HMODULE hmod = LoadLibraryEx(pszDllPath,NULL,LOAD_WITH_ALTERED_SEARCH_PATH);
|
|
if (hmod)
|
|
{
|
|
HRESULT hr;
|
|
PFNDLLGETCLASSOBJECT pfn = (PFNDLLGETCLASSOBJECT)GetProcAddress(hmod, "DllGetClassObject");
|
|
if (pfn)
|
|
hr = _CreateFromDllGetClassObject(pfn, pclsid, punkOuter, riid, ppv);
|
|
else
|
|
hr = E_FAIL;
|
|
|
|
if (FAILED(hr))
|
|
FreeLibrary(hmod);
|
|
return hr;
|
|
}
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
STDAPI SHGetInProcServerForClass(const CLSID *pclsid, LPTSTR pszDllPath, LPTSTR pszClass, DWORD cchClass, BOOL *pbLoadWithoutCOM)
|
|
{
|
|
TCHAR szKeyToOpen[GUIDSTR_MAX + 128], szInProcServer[GUIDSTR_MAX];
|
|
HKEY hkeyInProcServer;
|
|
DWORD dwSize = MAX_PATH * sizeof(TCHAR); // convert to count of bytes
|
|
DWORD dwError;
|
|
|
|
SHStringFromGUID(pclsid, szInProcServer, ARRAYSIZE(szInProcServer));
|
|
|
|
StrCpyN(pszClass, szInProcServer, cchClass);
|
|
|
|
*pszDllPath = 0;
|
|
|
|
StrCpyN(szKeyToOpen, TEXT("CLSID\\"), ARRAYSIZE(szKeyToOpen));
|
|
StrCatBuff(szKeyToOpen, szInProcServer, ARRAYSIZE(szKeyToOpen));
|
|
StrCatBuff(szKeyToOpen, TEXT("\\InProcServer32"), ARRAYSIZE(szKeyToOpen));
|
|
|
|
dwError = RegOpenKeyEx(HKEY_CLASSES_ROOT, szKeyToOpen, 0, KEY_QUERY_VALUE, &hkeyInProcServer);
|
|
if (dwError == ERROR_SUCCESS)
|
|
{
|
|
SHQueryValueEx(hkeyInProcServer, NULL, 0, NULL, (BYTE *)pszDllPath, &dwSize);
|
|
|
|
*pbLoadWithoutCOM = SHQueryValueEx(hkeyInProcServer, TEXT("LoadWithoutCOM"), NULL, NULL, NULL, NULL) == ERROR_SUCCESS;
|
|
RegCloseKey(hkeyInProcServer);
|
|
}
|
|
|
|
//
|
|
// Return a more accurate error code so we don't
|
|
// fire a bogus assertion.
|
|
//
|
|
if (*pszDllPath)
|
|
{
|
|
return S_OK;
|
|
}
|
|
else
|
|
{
|
|
// If error was "key not found", then the class is not registered.
|
|
// If no error, then class is not registered properly (e.g., null
|
|
// string for InProcServer32).
|
|
if (dwError == ERROR_FILE_NOT_FOUND || dwError == ERROR_SUCCESS)
|
|
{
|
|
return REGDB_E_CLASSNOTREG;
|
|
}
|
|
else
|
|
{
|
|
// Any other error is worth reporting as-is (out of memory,
|
|
// access denied, etc.)
|
|
return HRESULT_FROM_WIN32(dwError);
|
|
}
|
|
}
|
|
}
|
|
|
|
STDAPI _SHCoCreateInstance(const CLSID * pclsid, IUnknown *punkOuter, DWORD dwCoCreateFlags,
|
|
BOOL bMustBeApproved, REFIID riid, void **ppv)
|
|
{
|
|
HRESULT hr = E_FAIL;
|
|
TCHAR szClass[GUIDSTR_MAX + 64], szDllPath[MAX_PATH];
|
|
BOOL bLoadWithoutCOM = FALSE;
|
|
*ppv = NULL;
|
|
*szDllPath = 0;
|
|
|
|
// save us some registry accesses and try the shell first
|
|
// but only if its INPROC
|
|
if (dwCoCreateFlags & CLSCTX_INPROC_SERVER)
|
|
hr = _CreateFromShell(pclsid, punkOuter, riid, ppv);
|
|
|
|
#ifdef DEBUG
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
HRESULT hrRegistered = THR(SHGetInProcServerForClass(pclsid, szDllPath, szClass, ARRAYSIZE(szClass), &bLoadWithoutCOM));
|
|
|
|
//
|
|
// check to see if we're the explorer process before complaining (to
|
|
// avoid ripping during setup before all objects have been registered)
|
|
//
|
|
if (IsProcessAnExplorer() && !IsGuimodeSetupRunning() && hrRegistered == REGDB_E_CLASSNOTREG)
|
|
{
|
|
ASSERTMSG(FAILED(hr), "object not registered (add to selfreg.inx) pclsid = %x", pclsid);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (FAILED(hr))
|
|
{
|
|
BOOL fNeedsInProc = ((dwCoCreateFlags & CLSCTX_ALL) == CLSCTX_INPROC_SERVER);
|
|
hr = fNeedsInProc ? THR(SHGetInProcServerForClass(pclsid, szDllPath, szClass, ARRAYSIZE(szClass), &bLoadWithoutCOM)) : S_FALSE;
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
if (hr == S_OK && _IsShellDll(szDllPath))
|
|
{
|
|
// Object likely moved out of the shell DLL.
|
|
hr = CLASS_E_CLASSNOTAVAILABLE;
|
|
}
|
|
else if (bMustBeApproved &&
|
|
SHStringFromGUID(pclsid, szClass, ARRAYSIZE(szClass)) &&
|
|
!_IsShellExtApproved(szClass, szDllPath))
|
|
{
|
|
TraceMsg(TF_ERROR, "SHCoCreateInstance() %s needs to be registered under HKLM or HKCU"
|
|
",Software\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved", szClass);
|
|
hr = HRESULT_FROM_WIN32(ERROR_ACCESS_DENIED);
|
|
}
|
|
else
|
|
{
|
|
hr = THR(SHCoCreateInstanceAC(pclsid, punkOuter, dwCoCreateFlags, riid, ppv));
|
|
|
|
if (FAILED(hr) && fNeedsInProc && bLoadWithoutCOM)
|
|
{
|
|
if ((hr == REGDB_E_IIDNOTREG) || (hr == CO_E_NOTINITIALIZED))
|
|
{
|
|
hr = THR(_CreateFromDll(szDllPath, pclsid, punkOuter, riid, ppv));
|
|
}
|
|
}
|
|
|
|
// only RIP if this is not a secondary explorer process since secondary explorers dont init com or ole since
|
|
// they are going to delegate to an existing process and we don't want to have to load ole for perf in that case.
|
|
if (!IsSecondaryExplorerProcess())
|
|
{
|
|
RIPMSG((hr != CO_E_NOTINITIALIZED), "COM not inited for dll %s", szDllPath);
|
|
}
|
|
|
|
// sometimes we need to permanently pin these objects.
|
|
if (SUCCEEDED(hr) && fNeedsInProc && (OBJCOMPATF_PINDLL & SHGetObjectCompatFlags(NULL, pclsid)))
|
|
{
|
|
SHPinDllOfCLSID(pclsid);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (FAILED(hr) && (hr != E_NOINTERFACE)) // E_NOINTERFACE means riid not accepted
|
|
{
|
|
ULONGLONG dwTF = IsFlagSet(g_dwBreakFlags, BF_COCREATEINSTANCE) ? TF_ALWAYS : TF_WARNING;
|
|
TraceMsg(dwTF, "CoCreateInstance: failed (%s,%x)", szClass, hr);
|
|
}
|
|
#endif
|
|
return hr;
|
|
}
|
|
|
|
STDAPI SHCoCreateInstance(LPCTSTR pszCLSID, const CLSID * pclsid, IUnknown *punkOuter, REFIID riid, void **ppv)
|
|
{
|
|
CLSID clsid;
|
|
if (pszCLSID)
|
|
{
|
|
SHCLSIDFromString(pszCLSID, &clsid);
|
|
pclsid = &clsid;
|
|
}
|
|
return _SHCoCreateInstance(pclsid, punkOuter, CLSCTX_INPROC_SERVER, FALSE, riid, ppv);
|
|
}
|
|
|
|
//
|
|
// create a shell extension object, ensures that object is in the approved list
|
|
//
|
|
STDAPI SHExtCoCreateInstance2(LPCTSTR pszCLSID, const CLSID *pclsid, IUnknown *punkOuter, DWORD dwClsCtx, REFIID riid, void **ppv)
|
|
{
|
|
CLSID clsid;
|
|
|
|
if (pszCLSID)
|
|
{
|
|
SHCLSIDFromString(pszCLSID, &clsid);
|
|
pclsid = &clsid;
|
|
}
|
|
|
|
return _SHCoCreateInstance(pclsid, punkOuter, dwClsCtx, TRUE, riid, ppv);
|
|
}
|
|
|
|
STDAPI SHExtCoCreateInstance(LPCTSTR pszCLSID, const CLSID *pclsid, IUnknown *punkOuter, REFIID riid, void **ppv)
|
|
{
|
|
return SHExtCoCreateInstance2(pszCLSID, pclsid, punkOuter, CLSCTX_NO_CODE_DOWNLOAD | CLSCTX_INPROC_SERVER, riid, ppv);
|
|
}
|
|
|
|
STDAPI_(BOOL) SHIsBadInterfacePtr(const void *pv, UINT cbVtbl)
|
|
{
|
|
IUnknown const * punk = pv;
|
|
return IsBadReadPtr(punk, sizeof(punk->lpVtbl)) ||
|
|
IsBadReadPtr(punk->lpVtbl, cbVtbl) ||
|
|
IsBadCodePtr((FARPROC)punk->lpVtbl->Release);
|
|
}
|
|
|
|
// private API that loads COM inproc objects out of band of COM. this
|
|
// should be used very carefully, only in special legacy cases where
|
|
// we knowingly need to break COM rules. right now this is only for AVIFile
|
|
// as it depended on the Win95 behavior of SHCoCreateInstance() loading objects
|
|
// without COM being inited and without them being marshalled
|
|
|
|
STDAPI SHCreateInstance(REFCLSID clsid, REFIID riid, void **ppv)
|
|
{
|
|
TCHAR szClass[GUIDSTR_MAX + 64], szDllPath[MAX_PATH];
|
|
BOOL bLoadWithoutCOM;
|
|
|
|
HRESULT hr = SHGetInProcServerForClass(clsid, szDllPath, szClass, ARRAYSIZE(szClass), &bLoadWithoutCOM);
|
|
if (SUCCEEDED(hr))
|
|
{
|
|
hr = THR(_CreateFromDll(szDllPath, clsid, NULL, riid, ppv));
|
|
}
|
|
else
|
|
{
|
|
*ppv = NULL;
|
|
}
|
|
return hr;
|
|
}
|