Leaked source code of windows server 2003
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36 KiB

#include "dtctreg.h"
#include "hwdev.h"
#include "pnp.h"
#include "cmmn.h"
#include "sfstr.h"
#include "reg.h"
#include "misc.h"
#include "shobjidl.h"
#include "shpriv.h"
#include "users.h"
#include "strsafe.h"
#include "str.h"
#include "dbg.h"
#include "mischlpr.h"
#define ARRAYSIZE(a) (sizeof((a))/sizeof((a)[0]))
HRESULT _GetValueToUse(LPWSTR pszKeyName, LPWSTR psz, DWORD cch)
{
HKEY hkey;
HRESULT hr = _RegOpenKey(HKEY_LOCAL_MACHINE, pszKeyName, &hkey);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
// For now we take the first one.
hr = _RegEnumStringValue(hkey, 0, psz, cch);
_RegCloseKey(hkey);
}
return hr;
}
// Return Values:
// S_FALSE: Can't find it
HRESULT _GetEventHandlerFromKey(LPCWSTR pszKeyName, LPCWSTR pszEventType,
LPWSTR pszEventHandler, DWORD cchEventHandler)
{
WCHAR szEventHandler[MAX_KEY];
DWORD cchLeft;
LPWSTR pszNext;
HRESULT hr = SafeStrCpyNEx(szEventHandler, pszKeyName,
ARRAYSIZE(szEventHandler), &pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = SafeStrCpyNEx(pszNext, TEXT("\\EventHandlers\\"), cchLeft,
&pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = SafeStrCpyN(pszNext, pszEventType, cchLeft);
if (SUCCEEDED(hr))
{
hr = _GetValueToUse(szEventHandler, pszEventHandler,
cchEventHandler);
}
}
}
return hr;
}
// Return Values:
// S_FALSE: Can't find it
HRESULT _GetEventHandlerFromDeviceHandler(LPCWSTR pszDeviceHandler,
LPCWSTR pszEventType, LPWSTR pszEventHandler, DWORD cchEventHandler)
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("DeviceHandlers\\"));
HRESULT hr = SafeStrCatN(szKeyName, pszDeviceHandler,
ARRAYSIZE(szKeyName));
if (SUCCEEDED(hr))
{
hr = _GetEventHandlerFromKey(szKeyName, pszEventType, pszEventHandler,
cchEventHandler);
}
return hr;
}
HRESULT _GetStuffFromHandlerHelper(LPCWSTR pszHandler, LPCWSTR pszValueName,
LPWSTR psz, DWORD cch)
{
HKEY hkey;
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("Handlers\\"));
HRESULT hr = _RegOpenKey(HKEY_LOCAL_MACHINE, szKeyName, &hkey);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
hr = _RegQueryString(hkey, pszHandler,
pszValueName, psz, cch);
_RegCloseKey(hkey);
}
return hr;
}
HRESULT _GetActionFromHandler(LPCWSTR pszHandler, LPWSTR pszAction,
DWORD cchAction)
{
HRESULT hr = _GetStuffFromHandlerHelper(pszHandler, TEXT("Action"),
pszAction, cchAction);
if (SUCCEEDED(hr) && (S_FALSE == hr))
{
hr = _GetStuffFromHandlerHelper(pszHandler, TEXT("FriendlyName"),
pszAction, cchAction);
}
return hr;
}
HRESULT _GetProviderFromHandler(LPCWSTR pszHandler, LPWSTR pszProvider,
DWORD cchProvider)
{
HRESULT hr = _GetStuffFromHandlerHelper(pszHandler, TEXT("Provider"),
pszProvider, cchProvider);
if (SUCCEEDED(hr) && (S_FALSE == hr))
{
hr = SafeStrCpyN(pszProvider, TEXT("<need provider>"), cchProvider);
}
return hr;
}
HRESULT _GetIconLocationFromHandler(LPCWSTR pszHandler,
LPWSTR pszIconLocation, DWORD cchIconLocation)
{
return _GetStuffFromHandlerHelper(pszHandler, TEXT("DefaultIcon"),
pszIconLocation, cchIconLocation);
}
HRESULT _GetInvokeProgIDFromHandler(LPCWSTR pszHandler,
LPWSTR pszInvokeProgID, DWORD cchInvokeProgID)
{
return _GetStuffFromHandlerHelper(pszHandler, TEXT("InvokeProgID"),
pszInvokeProgID, cchInvokeProgID);
}
HRESULT _GetInvokeVerbFromHandler(LPCWSTR pszHandler,
LPWSTR pszInvokeVerb, DWORD cchInvokeVerb)
{
return _GetStuffFromHandlerHelper(pszHandler, TEXT("InvokeVerb"),
pszInvokeVerb, cchInvokeVerb);
}
HRESULT _GetDevicePropertySize(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, BOOL fUseMergeMultiSz, DWORD* pcbSize)
{
// Instance
DEVINST devinst;
HRESULT hr = phwdevinst->GetDeviceInstance(&devinst);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
BYTE rgb[1];
ULONG ulData = sizeof(rgb);
ULONG ulFlags = 0;
if (fUseMergeMultiSz)
{
ulFlags = CM_CUSTOMDEVPROP_MERGE_MULTISZ;
}
CONFIGRET cr = CM_Get_DevNode_Custom_Property(devinst, pszPropName,
NULL, rgb, &ulData, ulFlags);
if (CR_SUCCESS != cr)
{
if (CR_BUFFER_SMALL == cr)
{
hr = S_OK;
*pcbSize = ulData;
}
else
{
// If we do not have the data at the instance level, let's try it
// at the DeviceGroup level.
// DeviceGroup
WCHAR szDeviceGroup[MAX_DEVICEGROUP];
ulData = sizeof(szDeviceGroup);
cr = CM_Get_DevNode_Custom_Property(devinst, TEXT("DeviceGroup"),
NULL, (PBYTE)szDeviceGroup, &ulData, 0);
if (CR_SUCCESS == cr)
{
WCHAR szKey[MAX_KEY] =
SHDEVICEEVENTROOT(TEXT("DeviceGroups\\"));
hr = SafeStrCatN(szKey, szDeviceGroup, ARRAYSIZE(szKey));
if (SUCCEEDED(hr))
{
hr = _GetPropertySizeHelper(szKey, pszPropName,
pcbSize);
}
}
else
{
hr = S_FALSE;
}
}
}
}
if (S_FALSE == hr)
{
// If we do not have the data at the instance level, nor the device
// group level, let's try it at the DeviceClass level.
// DeviceClass
GUID guidInterface;
hr = phwdevinst->GetInterfaceGUID(&guidInterface);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
WCHAR szKey[MAX_KEY];
LPWSTR pszNext;
DWORD cchLeft;
hr = SafeStrCpyNEx(szKey,
SHDEVICEEVENTROOT(TEXT("DeviceClasses\\")), ARRAYSIZE(szKey),
&pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = _StringFromGUID(&guidInterface, pszNext, cchLeft);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
hr = _GetPropertySizeHelper(szKey, pszPropName, pcbSize);
}
}
}
}
return hr;
}
HRESULT _GetDevicePropertyGeneric(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, BOOL fUseMergeMultiSz, DWORD* pdwType, LPBYTE pbData,
DWORD cbData)
{
// Instance
DEVINST devinst;
HRESULT hr = phwdevinst->GetDeviceInstance(&devinst);
if (CHWEventDetectorHelper::_fDiagnosticAppPresent)
{
WCHAR szPnpID[MAX_PNPID];
WCHAR szGUID[MAX_GUIDSTRING];
GUID guid;
HRESULT hrTmp = phwdevinst->GetPnpID(szPnpID, ARRAYSIZE(szPnpID));
if (SUCCEEDED(hrTmp) && (S_FALSE != hrTmp))
{
DIAGNOSTIC((TEXT("[0269]Device PnP ID: %s"), szPnpID));
}
hrTmp = phwdevinst->GetInterfaceGUID(&guid);
if (SUCCEEDED(hrTmp) && (S_FALSE != hrTmp))
{
hrTmp = _StringFromGUID(&guid, szGUID, ARRAYSIZE(szGUID));
if (SUCCEEDED(hrTmp))
{
DIAGNOSTIC((TEXT("[0270]Device Class ID: %s"), szGUID));
}
}
}
*pdwType = 0;
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
ULONG ulData = cbData;
ULONG ulType;
ULONG ulFlags = 0;
if (fUseMergeMultiSz)
{
ulFlags = CM_CUSTOMDEVPROP_MERGE_MULTISZ;
}
CONFIGRET cr = CM_Get_DevNode_Custom_Property(devinst, pszPropName,
&ulType, pbData, &ulData, ulFlags);
if (CR_SUCCESS != cr)
{
// If we do not have the data at the instance level, let's try it
// at the DeviceGroup level.
// DeviceGroup
WCHAR szDeviceGroup[MAX_DEVICEGROUP];
DIAGNOSTIC((TEXT("[0252]Did NOT get Custom Property (%s) at device instance level"),
pszPropName));
ulData = sizeof(szDeviceGroup);
cr = CM_Get_DevNode_Custom_Property(devinst, TEXT("DeviceGroup"),
NULL, (PBYTE)szDeviceGroup, &ulData, 0);
if (CR_SUCCESS == cr)
{
WCHAR szKey[MAX_KEY] =
SHDEVICEEVENTROOT(TEXT("DeviceGroups\\"));
hr = SafeStrCatN(szKey, szDeviceGroup, ARRAYSIZE(szKey));
if (SUCCEEDED(hr))
{
hr = _GetPropertyHelper(szKey, pszPropName, pdwType,
pbData, cbData);
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
DIAGNOSTIC((TEXT("[0253]Got Custom Property (%s) at DeviceGroup level (%s)"),
pszPropName, szDeviceGroup));
}
else
{
DIAGNOSTIC((TEXT("[0254]Did NOT get Custom Property (%s) at DeviceGroup level (%s)"),
pszPropName, szDeviceGroup));
}
}
}
}
else
{
hr = S_FALSE;
}
}
else
{
DIAGNOSTIC((TEXT("[0251]Got Custom Property (%s) at device instance level"), pszPropName));
*pdwType = (DWORD)ulType;
}
}
if (S_FALSE == hr)
{
// If we do not have the data at the instance level, nor the device
// group level, let's try it at the DeviceClass level.
// DeviceClass
GUID guidInterface;
hr = phwdevinst->GetInterfaceGUID(&guidInterface);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
WCHAR szKey[MAX_KEY];
LPWSTR pszNext;
DWORD cchLeft;
hr = SafeStrCpyNEx(szKey,
SHDEVICEEVENTROOT(TEXT("DeviceClasses\\")), ARRAYSIZE(szKey),
&pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = _StringFromGUID(&guidInterface, pszNext, cchLeft);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
hr = _GetPropertyHelper(szKey, pszPropName, pdwType,
pbData, cbData);
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
DIAGNOSTIC((TEXT("[0255]Got Custom Property (%s) at DeviceClass level (%s)"),
pszPropName, pszNext));
}
else
{
DIAGNOSTIC((TEXT("[0256]Did NOT get Custom Property (%s) at DeviceClass level (%s)"),
pszPropName, pszNext));
}
}
}
}
}
}
return hr;
}
HRESULT _GetDevicePropertyAsString(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, LPCWSTR psz, DWORD cch)
{
DWORD dwType;
DWORD cbData = cch * sizeof(WCHAR);
return _GetDevicePropertyGeneric(phwdevinst, pszPropName, FALSE, &dwType,
(PBYTE)psz, cbData);
}
HRESULT _GetDevicePropertyGenericAsMultiSz(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, BOOL fUseMergeMultiSz, WORD_BLOB** ppblob)
{
DWORD cbSize = NULL;
HRESULT hr = _GetDevicePropertySize(phwdevinst, pszPropName, FALSE,
&cbSize);
*ppblob = NULL;
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
WORD_BLOB* pblob = (WORD_BLOB*)CoTaskMemAlloc(
sizeof(WORD_BLOB) + cbSize + sizeof(WCHAR));
if (pblob)
{
DWORD dwType;
DWORD cbSize2 = cbSize + sizeof(WCHAR);
pblob->clSize = (cbSize + sizeof(WCHAR))/2;
hr = _GetDevicePropertyGeneric(phwdevinst, pszPropName,
fUseMergeMultiSz, &dwType, (PBYTE)(pblob->asData),
cbSize2);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
if (REG_MULTI_SZ == dwType)
{
DIAGNOSTIC((TEXT("[0265]Found Property: '%s'"), pszPropName));
*ppblob = pblob;
pblob = NULL;
}
else
{
DIAGNOSTIC((TEXT("[0266]Found Property: '%s', but NOT REG_MULTI_SZ type"), pszPropName));
hr = E_FAIL;
}
}
if (pblob)
{
// It did not get assigned
CoTaskMemFree(pblob);
}
}
else
{
hr = E_OUTOFMEMORY;
}
}
return hr;
}
HRESULT _GetDevicePropertyGenericAsBlob(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, BYTE_BLOB** ppblob)
{
DWORD cbSize = NULL;
HRESULT hr = _GetDevicePropertySize(phwdevinst, pszPropName, FALSE,
&cbSize);
*ppblob = NULL;
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
BYTE_BLOB* pblob = (BYTE_BLOB*)CoTaskMemAlloc(
sizeof(BYTE_BLOB) + cbSize);
if (pblob)
{
DWORD dwType;
pblob->clSize = cbSize;
hr = _GetDevicePropertyGeneric(phwdevinst, pszPropName,
FALSE, &dwType, (PBYTE)pblob->abData, pblob->clSize);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
if (REG_BINARY == dwType)
{
DIAGNOSTIC((TEXT("[0267]Found Property: '%s'"), pszPropName));
*ppblob = pblob;
pblob = NULL;
}
else
{
DIAGNOSTIC((TEXT("[0268]Found Property: '%s', but NOT REG_BINARY type"), pszPropName));
hr = E_FAIL;
}
}
if (pblob)
{
// It did not get assigned
CoTaskMemFree(pblob);
}
}
else
{
hr = E_OUTOFMEMORY;
}
}
return hr;
}
HRESULT _GetDevicePropertyStringNoBuf(CHWDeviceInst* phwdevinst,
LPCWSTR pszPropName, BOOL fUseMergeMultiSz, DWORD* pdwType,
LPWSTR* ppszProp)
{
DWORD cbSize = NULL;
HRESULT hr = _GetDevicePropertySize(phwdevinst, pszPropName, FALSE,
&cbSize);
*ppszProp = NULL;
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
LPWSTR psz;
cbSize += sizeof(WCHAR);
psz = (LPWSTR)CoTaskMemAlloc(cbSize);
if (psz)
{
hr = _GetDevicePropertyGeneric(phwdevinst, pszPropName,
fUseMergeMultiSz, pdwType, (PBYTE)psz, cbSize);
if (FAILED(hr) || (S_FALSE == hr))
{
CoTaskMemFree(psz);
}
else
{
*ppszProp = psz;
}
}
else
{
hr = E_OUTOFMEMORY;
}
}
return hr;
}
// Return Values:
// S_FALSE: Can't find it
HRESULT _GetDeviceHandler(CHWDeviceInst* phwdevinst, LPWSTR pszDeviceHandler,
DWORD cchDeviceHandler)
{
return _GetDevicePropertyAsString(phwdevinst, TEXT("DeviceHandlers"),
pszDeviceHandler, cchDeviceHandler);
}
///////////////////////////////////////////////////////////////////////////////
//
HRESULT _OpenHandlerRegKey(LPCWSTR pszHandler, HKEY* phkey)
{
WCHAR szKey[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("Handlers\\"));
HRESULT hr = SafeStrCatN(szKey, pszHandler, ARRAYSIZE(szKey));
if (SUCCEEDED(hr))
{
hr = _RegOpenKey(HKEY_LOCAL_MACHINE, szKey, phkey);
}
return hr;
}
HRESULT _CloseHandlerRegKey(HKEY hkey)
{
return _RegCloseKey(hkey);
}
HRESULT _GetHandlerCancelCLSID(LPCWSTR pszHandler, CLSID* pclsid)
{
HKEY hkey;
HRESULT hr = _OpenHandlerRegKey(pszHandler, &hkey);
if (SUCCEEDED(hr))
{
WCHAR szProgID[MAX_PROGID];
hr = _RegQueryString(hkey, NULL, TEXT("CLSIDForCancel"), szProgID,
ARRAYSIZE(szProgID));
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
hr = _GUIDFromString(szProgID, pclsid);
DIAGNOSTIC((TEXT("[0162]Got Handler Cancel CLSID (from CLSIDForCancel): %s"), szProgID));
TRACE(TF_SHHWDTCTDTCTREG, TEXT("Got Handler Cancel CLSID"));
}
else
{
hr = _GetHandlerCLSID(pszHandler, pclsid);
if (CHWEventDetectorHelper::_fDiagnosticAppPresent)
{
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
hr = _StringFromGUID(pclsid, szProgID, ARRAYSIZE(szProgID));
if (SUCCEEDED(hr))
{
DIAGNOSTIC((TEXT("[0164]Got Handler Cancel CLSID: %s"), szProgID));
}
}
}
}
}
}
_CloseHandlerRegKey(hkey);
}
return hr;
}
HRESULT _GetHandlerCLSID(LPCWSTR pszHandler, CLSID* pclsid)
{
HKEY hkey;
HRESULT hr = _OpenHandlerRegKey(pszHandler, &hkey);
if (SUCCEEDED(hr))
{
WCHAR szProgID[MAX_PROGID];
hr = _RegQueryString(hkey, NULL, TEXT("ProgID"), szProgID,
ARRAYSIZE(szProgID));
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
hr = CLSIDFromProgID(szProgID, pclsid);
DIAGNOSTIC((TEXT("[0160]Got Handler ProgID: %s"), szProgID));
TRACE(TF_SHHWDTCTDTCTREG, TEXT("Got Handler ProgID: %s"),
szProgID);
}
else
{
// Not there, maybe we have CLSID value?
// Reuse szProgID
hr = _RegQueryString(hkey, NULL, TEXT("CLSID"), szProgID,
ARRAYSIZE(szProgID));
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
hr = _GUIDFromString(szProgID, pclsid);
DIAGNOSTIC((TEXT("[0161]Got Handler CLSID: %s"), szProgID));
TRACE(TF_SHHWDTCTDTCTREG, TEXT("Got Handler CLSID"));
}
else
{
DIAGNOSTIC((TEXT("[0163]Did NOT get Handler ProgID or CLSID")));
}
}
}
_CloseHandlerRegKey(hkey);
}
return hr;
}
// Return values:
// S_FALSE: Cannot find an InitCmdLine
//
HRESULT _GetInitCmdLine(LPCWSTR pszHandler, LPWSTR* ppsz)
{
HKEY hkey;
HRESULT hr = _OpenHandlerRegKey(pszHandler, &hkey);
*ppsz = NULL;
if (SUCCEEDED(hr))
{
DWORD cb = NULL;
hr = _RegQueryValueSize(hkey, NULL, TEXT("InitCmdLine"), &cb);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
LPWSTR psz = (LPWSTR)LocalAlloc(LPTR, cb);
if (psz)
{
hr = _RegQueryString(hkey, NULL, TEXT("InitCmdLine"), psz,
cb / sizeof(WCHAR));
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
DIAGNOSTIC((TEXT("[0158]Got InitCmdLine for Handler (%s): '%s'"), pszHandler, psz));
*ppsz = psz;
}
else
{
LocalFree((HLOCAL)psz);
}
}
else
{
hr = E_OUTOFMEMORY;
}
}
else
{
DIAGNOSTIC((TEXT("[0159]NO InitCmdLine for Handler (%s)"), pszHandler));
}
_CloseHandlerRegKey(hkey);
}
return hr;
}
HRESULT _MakeUserDefaultValueString(LPCWSTR pszDeviceID,
LPCWSTR pszEventHandler, LPWSTR pszUserDefault, DWORD cchUserDefault)
{
DWORD cchLeft;
LPWSTR pszNext;
HRESULT hr = SafeStrCpyNEx(pszUserDefault, pszDeviceID, cchUserDefault,
&pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = SafeStrCpyNEx(pszNext, TEXT("+"), cchLeft, &pszNext, &cchLeft);
if (SUCCEEDED(hr))
{
hr = SafeStrCpyN(pszNext, pszEventHandler, cchLeft);
}
}
return hr;
}
// from setenum.cpp
HRESULT _GetKeyLastWriteTime(LPCWSTR pszHandler, FILETIME* pft);
HRESULT _HaveNewHandlersBeenInstalledSinceUserSelection(LPCWSTR pszEventHandler,
FILETIME* pftUserSelection, BOOL* pfNewHandlersSinceUserSelection)
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("EventHandlers\\"));
HRESULT hr = SafeStrCatN(szKeyName, pszEventHandler,
ARRAYSIZE(szKeyName));
ULARGE_INTEGER ulUserSelection;
ulUserSelection.LowPart = pftUserSelection->dwLowDateTime;
ulUserSelection.HighPart = pftUserSelection->dwHighDateTime;
*pfNewHandlersSinceUserSelection = FALSE;
if (SUCCEEDED(hr))
{
HKEY hkey;
hr = _RegOpenKey(HKEY_LOCAL_MACHINE, szKeyName, &hkey);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
DWORD dw = 0;
BOOL fGoOut = FALSE;
do
{
WCHAR szHandler[MAX_HANDLER];
hr = _RegEnumStringValue(hkey, dw, szHandler,
ARRAYSIZE(szHandler));
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
FILETIME ft;
hr = _GetKeyLastWriteTime(szHandler, &ft);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
ULARGE_INTEGER ul;
ul.LowPart = ft.dwLowDateTime;
ul.HighPart = ft.dwHighDateTime;
if (ul.QuadPart > ulUserSelection.QuadPart)
{
*pfNewHandlersSinceUserSelection = TRUE;
hr = S_OK;
fGoOut = TRUE;
}
}
}
else
{
fGoOut = TRUE;
}
++dw;
}
while (!fGoOut);
if (S_FALSE == hr)
{
hr = S_OK;
}
_RegCloseKey(hkey);
}
}
return hr;
}
struct _USERSELECTIONHIDDENDATA
{
_USERSELECTIONHIDDENDATA() : dw(0) {}
FILETIME ft;
// Set this to zero so that RegSetValueEx will not NULL terminate out stuff
DWORD dw;
};
// See comment for _MakeFinalUserDefaultHandler
HRESULT _GetHandlerAndFILETIME(HKEY hkeyUser, LPCWSTR pszKeyName,
LPCWSTR pszUserDefault, LPWSTR pszHandler, DWORD cchHandler, FILETIME* pft)
{
DWORD cb;
HRESULT hr = _RegQueryValueSize(hkeyUser, pszKeyName, pszUserDefault, &cb);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
BYTE* pb = (BYTE*)LocalAlloc(LPTR, cb);
if (pb)
{
DWORD dwType;
hr = _RegQueryGenericWithType(hkeyUser, pszKeyName, pszUserDefault,
&dwType, pb, cb);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
// We should have something like this:
// MyHandler\0<_USERSELECTIONHIDDENDATA struct>
hr = StringCchCopy(pszHandler, cchHandler, (LPWSTR)pb);
if (SUCCEEDED(hr))
{
DWORD cbString = (lstrlen(pszHandler) + 1) * sizeof(WCHAR);
// Make sure we're dealing with the right thing
if ((cb >= cbString + sizeof(_USERSELECTIONHIDDENDATA)) &&
(cb <= cbString + sizeof(_USERSELECTIONHIDDENDATA) + sizeof(void*)))
{
// Yep! So _USERSELECTIONHIDDENDATA should be at the end of the blob
_USERSELECTIONHIDDENDATA* pushd = (_USERSELECTIONHIDDENDATA*)
(pb + (cb - sizeof(_USERSELECTIONHIDDENDATA)));
*pft = pushd->ft;
}
else
{
*pszHandler = 0;
hr = S_FALSE;
}
}
}
LocalFree(pb);
}
else
{
hr = E_OUTOFMEMORY;
}
}
return hr;
}
HRESULT _GetEventHandlerDefault(HKEY hkeyUser, LPCWSTR pszEventHandler,
LPWSTR pszHandler, DWORD cchHandler)
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("EventHandlersDefaultSelection\\"));
return _RegQueryString(hkeyUser, szKeyName, pszEventHandler, pszHandler,
cchHandler);
}
HRESULT _GetUserDefaultHandler(LPCWSTR pszDeviceID, LPCWSTR pszEventHandler,
LPWSTR pszHandler, DWORD cchHandler, BOOL fImpersonateCaller)
{
WCHAR szUserDefault[MAX_USERDEFAULT] = TEXT("H:");
HRESULT hr = _MakeUserDefaultValueString(pszDeviceID, pszEventHandler,
&(szUserDefault[2]), ARRAYSIZE(szUserDefault) - 2);
if (cchHandler)
{
*pszHandler = 0;
}
if (SUCCEEDED(hr))
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("UserChosenExecuteHandlers\\"));
HKEY hkeyUser;
HANDLE hThreadToken;
if (GUH_IMPERSONATEUSER == fImpersonateCaller)
{
hr = _CoGetCallingUserHKCU(&hThreadToken, &hkeyUser);
}
else
{
hr = _GetCurrentUserHKCU(&hThreadToken, &hkeyUser);
}
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
FILETIME ft;
DWORD dwHandlerDefaultFlag = 0;
hr = _GetHandlerAndFILETIME(hkeyUser, szKeyName,
szUserDefault, pszHandler, cchHandler, &ft);
if (SUCCEEDED(hr))
{
if (S_FALSE == hr)
{
// we do not have a UserChosenDefault
hr = SafeStrCpyN(pszHandler, TEXT("MSPromptEachTime"),
cchHandler);
}
else
{
// we have a user chosen default
dwHandlerDefaultFlag |= HANDLERDEFAULT_USERCHOSENDEFAULT;
}
}
if (SUCCEEDED(hr))
{
if (HANDLERDEFAULT_USERCHOSENDEFAULT & dwHandlerDefaultFlag)
{
BOOL fNewHandlersSinceUserSelection;
hr = _HaveNewHandlersBeenInstalledSinceUserSelection(
pszEventHandler, &ft, &fNewHandlersSinceUserSelection);
if (SUCCEEDED(hr))
{
if (fNewHandlersSinceUserSelection)
{
dwHandlerDefaultFlag |=
HANDLERDEFAULT_MORERECENTHANDLERSINSTALLED;
}
}
}
}
if (SUCCEEDED(hr))
{
BOOL fUseEventHandlerDefault = FALSE;
if (!(HANDLERDEFAULT_USERCHOSENDEFAULT & dwHandlerDefaultFlag))
{
fUseEventHandlerDefault = TRUE;
}
else
{
if (HANDLERDEFAULT_MORERECENTHANDLERSINSTALLED &
dwHandlerDefaultFlag)
{
fUseEventHandlerDefault = TRUE;
}
}
if (fUseEventHandlerDefault)
{
WCHAR szHandlerLocal[MAX_HANDLER];
hr = _GetEventHandlerDefault(hkeyUser, pszEventHandler,
szHandlerLocal, ARRAYSIZE(szHandlerLocal));
if (SUCCEEDED(hr))
{
if (S_FALSE != hr)
{
dwHandlerDefaultFlag |=
HANDLERDEFAULT_EVENTHANDLERDEFAULT;
if (HANDLERDEFAULT_USERCHOSENDEFAULT &
dwHandlerDefaultFlag)
{
if (lstrcmp(szHandlerLocal, pszHandler))
{
dwHandlerDefaultFlag |=
HANDLERDEFAULT_DEFAULTSAREDIFFERENT;
}
}
else
{
dwHandlerDefaultFlag |=
HANDLERDEFAULT_DEFAULTSAREDIFFERENT;
}
hr = StringCchCopy(pszHandler, cchHandler,
szHandlerLocal);
}
}
}
}
if (SUCCEEDED(hr))
{
// Let's build the return value
hr = HANDLERDEFAULT_MAKERETURNVALUE(dwHandlerDefaultFlag);
}
if (GUH_IMPERSONATEUSER == fImpersonateCaller)
{
_CoCloseCallingUserHKCU(hThreadToken, hkeyUser);
}
else
{
_CloseCurrentUserHKCU(hThreadToken, hkeyUser);
}
}
}
return hr;
}
HRESULT _GetHandlerForNoContent(LPCWSTR pszEventHandler, LPWSTR pszHandler,
DWORD cchHandler)
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("EventHandlers\\"));
HRESULT hr = SafeStrCatN(szKeyName, pszEventHandler, ARRAYSIZE(szKeyName));
if (SUCCEEDED(hr))
{
hr = _GetValueToUse(szKeyName, pszHandler, cchHandler);
}
return hr;
}
// We want to store the time this default is set. We'll need it to check if
// other handlers for this event were installed after the user made a choice.
// If that's the case, we'll reprompt the user.
// *!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!
// We store the time as a FILETIME *after* the '\0' string terminator. This is
// so it will be hidden in RegEdit.
// stephstm (2002-04-12)
// *!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!
HRESULT _MakeFinalUserDefaultHandler(LPCWSTR pszHandler, BYTE** ppb,
DWORD* pcb)
{
HRESULT hr;
DWORD cch = lstrlen(pszHandler) + 1;
DWORD cbOffset = cch * sizeof(WCHAR);
// Round up to be aligned on all platforms
cbOffset = (cbOffset + sizeof(void*)) / sizeof(void*) * sizeof(void*);
DWORD cb = cbOffset + sizeof(_USERSELECTIONHIDDENDATA);
BYTE* pb = (BYTE*)LocalAlloc(LPTR, cb);
if (pb)
{
hr = StringCchCopy((LPWSTR)pb, cch, pszHandler);
if (SUCCEEDED(hr))
{
_USERSELECTIONHIDDENDATA ushd;
GetSystemTimeAsFileTime(&(ushd.ft));
CopyMemory(pb + cb - sizeof(_USERSELECTIONHIDDENDATA), &ushd,
sizeof(ushd));
}
if (SUCCEEDED(hr))
{
*ppb = pb;
*pcb = cb;
}
else
{
LocalFree(pb);
}
}
else
{
hr = E_OUTOFMEMORY;
}
return hr;
}
HRESULT _DeleteUserDefaultHandler(HKEY hkeyUser, LPCWSTR pszDeviceID,
LPCWSTR pszEventHandler)
{
WCHAR szUserDefault[MAX_USERDEFAULT] = TEXT("H:");
HRESULT hr = _MakeUserDefaultValueString(pszDeviceID, pszEventHandler,
&(szUserDefault[2]), ARRAYSIZE(szUserDefault) - 2);
if (SUCCEEDED(hr))
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("UserChosenExecuteHandlers\\"));
hr = _RegDeleteValue(hkeyUser, szKeyName, szUserDefault);
}
return hr;
}
HRESULT _SetSoftUserDefaultHandler(LPCWSTR pszDeviceID,
LPCWSTR pszEventHandler, LPCWSTR pszHandler)
{
HKEY hkey;
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("EventHandlersDefaultSelection\\"));
HKEY hkeyUser;
HANDLE hThreadToken;
HRESULT hr = _CoGetCallingUserHKCU(&hThreadToken, &hkeyUser);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
DWORD dwDisp;
hr = _RegCreateKey(hkeyUser, szKeyName, &hkey, &dwDisp);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
hr = _RegSetString(hkey, pszEventHandler, pszHandler);
_DeleteUserDefaultHandler(hkeyUser, pszDeviceID, pszEventHandler);
_RegCloseKey(hkey);
}
_CoCloseCallingUserHKCU(hThreadToken, hkeyUser);
}
return hr;
}
HRESULT _DeleteSoftUserDefaultHandler(HKEY hkeyUser, LPCWSTR pszEventHandler)
{
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("EventHandlersDefaultSelection\\"));
return _RegDeleteValue(hkeyUser, szKeyName, pszEventHandler);
}
HRESULT _SetUserDefaultHandler(LPCWSTR pszDeviceID, LPCWSTR pszEventHandler,
LPCWSTR pszHandler)
{
WCHAR szUserDefault[MAX_USERDEFAULT] = TEXT("H:");
HRESULT hr = _MakeUserDefaultValueString(pszDeviceID, pszEventHandler,
&(szUserDefault[2]), ARRAYSIZE(szUserDefault) - 2);
if (SUCCEEDED(hr))
{
HKEY hkey;
WCHAR szKeyName[MAX_KEY] = SHDEVICEEVENTROOT(TEXT("UserChosenExecuteHandlers\\"));
HKEY hkeyUser;
HANDLE hThreadToken;
hr = _CoGetCallingUserHKCU(&hThreadToken, &hkeyUser);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
if (!lstrcmp(pszHandler, TEXT("MSPromptEachTime")))
{
hr = _DeleteUserDefaultHandler(hkeyUser, pszDeviceID,
pszEventHandler);
}
else
{
DWORD dwDisp;
hr = _RegCreateKey(hkeyUser, szKeyName, &hkey, &dwDisp);
if (SUCCEEDED(hr) && (S_FALSE != hr))
{
BYTE* pb;
DWORD cb;
hr = _MakeFinalUserDefaultHandler(pszHandler, &pb, &cb);
if (SUCCEEDED(hr))
{
// See comment above _MakeFinalUserDefaultHandler
// StephStm: 2002-04-09
if (ERROR_SUCCESS == RegSetValueEx(hkey, szUserDefault, 0,
REG_SZ, pb, cb))
{
_DeleteSoftUserDefaultHandler(hkeyUser,
pszEventHandler);
hr = S_OK;
}
else
{
hr = S_FALSE;
}
LocalFree(pb);
}
_RegCloseKey(hkey);
}
}
_CoCloseCallingUserHKCU(hThreadToken, hkeyUser);
}
}
return hr;
}
///////////////////////////////////////////////////////////////////////////////
//