c++ - 即使使用系统服务中的 RegOpenCurrentUser 也无法获取用户级注册表值

Question

我写了一个系统服务，我想在其中获取事件用户在HKEY_CURRENT_USER 下的一个注册表值。我写了如下代码。但是，它似乎只能获取系统级别的注册表值，无法获取事件用户的注册表值。请参阅下面的代码。哪里有问题？少了什么？

void GetUserRegistryFromSystemService()
{
#ifdef Q_OS_WIN

    DWORD sessionId = WTSGetActiveConsoleSessionId();
    qInfo() << "Session ID = " << sessionId;

    wchar_t * ppUserName[100];
    DWORD sizeOfUserName;
    WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, sessionId, WTSUserName, ppUserName, &sizeOfUserName);
    qInfo() << "Windows User Name = " << QString::fromWCharArray(*ppUserName);

    std::wstring strValueOfBinDir = L"Unknown Value";
    LONG regOpenResult = ERROR_SUCCESS;

    HANDLE hUserToken = NULL;
    HANDLE hFakeToken = NULL;

    if (WTSQueryUserToken(sessionId, &hUserToken))
    {
         if (DuplicateTokenEx(hUserToken, TOKEN_ASSIGN_PRIMARY | TOKEN_ALL_ACCESS, 0, SecurityImpersonation, TokenPrimary, &hFakeToken) == TRUE)
         {
            qInfo() << "Before ImpersonateLoggedOnUser()......";
            if (ImpersonateLoggedOnUser(hFakeToken))
            {
                HKEY hKey;

                regOpenResult = RegOpenCurrentUser(KEY_READ, &hKey);
                if (regOpenResult != ERROR_SUCCESS)
                {
                    qCritical() << "Failed to call RegOpenCurrentUser(), Error is " << regOpenResult;
                }

                // Fails to get this hive, will get the default value "Unkown"
                RegOpenKeyEx(HKEY_CURRENT_USER,
                             TEXT("Software\\Baidu\\BaiduYunGuanjia"),
                             0,
                             KEY_READ,
                             &hKey);
                GetStringRegKey(hKey, TEXT("installDir"), strValueOfBinDir, TEXT("Unknown"));

                // It can get the following hive successfully
                // RegOpenKeyEx(HKEY_LOCAL_MACHINE,
                //              TEXT("Software\\GitForWindows"),
                //              0,
                //              KEY_READ,
                //              &hKey);
                // GetStringRegKey(hKey, TEXT("InstallPath"), strValueOfBinDir, TEXT("Unknown"));

                RevertToSelf();
            }
            else
            {
                qCritical() << "Failed to ImpersonateLoggedOnUser...";
            }
            CloseHandle(hFakeToken);
        }
        else
        {
            qCritical() << "Failed to call DuplicateTokenEx...";
        }
        CloseHandle(hUserToken);
    }
    else
    {
        qCritical() << "Failed to get the user token of session " << sessionId;
    }

    qInfo() << "The value of Registry is " << QString::fromWCharArray( strValueOfBinDir.c_str() );

#endif
}

Answer 1

您应该在 RegOpenKeyEx 中使用从 RegOpenCurrentUser 接收的 HKEY 句柄而不是 HKEY_CURRENT_USER:

regOpenResult = RegOpenCurrentUser(KEY_READ, &hKey);
if (regOpenResult != ERROR_SUCCESS)
{
    qCritical() << "Failed to call RegOpenCurrentUser(), Error is " << regOpenResult;
}
HKEY hSubKey; 
// Fails to get this hive, will get the default value "Unkown"
RegOpenKeyEx(hKey, TEXT("Software\\Baidu\\BaiduYunGuanjia"), 0, KEY_READ, &hSubKey);