从 Vista 上的服务中使用 CreateProcessAsUser 的桌面问题

Question

我正在使用 VC++ 从 Vista 上使用 CreateProcessAsUser 的服务创建进程。当我通过本地登录机器执行此代码时，进程创建成功。当我使用远程桌面 (mstsc) 从另一台机器登录到我的机器并启动我的应用程序时，相同的代码失败。

我可以理解，当我进行远程登录时，活动桌面被视为远程桌面。谁能帮我获取当前登录用户桌面的桌面名称而不是远程桌面的桌面名称。

这是我的代码

ACTIVECONSOLESESSIONIDFUNC lpfnProc;    // WTSGetActiveConsoleSessionId function pointer
HMODULE hModule = NULL;         // Instance for kernel32.dll library
DWORD dwSessionId = 0;          // Session ID
HANDLE hToken = NULL;           // Active session token
HANDLE hDupToken = NULL;        // Duplicate session token
WCHAR szErr[1024] = {0};

LPVOID lpEnvironment = NULL;            // Environtment block

// Get the active session ID
hModule = LoadLibrary(KERNEL32LIB);
if(!hModule)
{
   //wsprintf(szErr, L"LoadLibrary Error: %d", GetLastError());
   return;
}

lpfnProc = (ACTIVECONSOLESESSIONIDFUNC)GetProcAddress(hModule,"WTSGetActiveConsoleSessionId"); 

dwSessionId = lpfnProc();

// Get token of the logged in user by the active session ID 
BOOL bRet = WTSQueryUserToken(dwSessionId, &hToken);

if (!bRet)
{       
    //wsprintf(szErr, L"WTSQueryUserToken Error: %d", GetLastError());
    return;
}

// Get duplicate token from the active logged in user's token
bRet = DuplicateTokenEx(hToken,     // Active session token
                 MAXIMUM_ALLOWED,           // Desired access
                         NULL,                      // Token attributes                                         
                         SecurityIdentification,    // Impersonation level
                         TokenPrimary,              // Token type
                         &hDupToken);               // New/Duplicate token
    if (!bRet)
    {
        //wsprintf(szErr, L"DuplicateTokenEx Error: %d", GetLastError());
        return;
    }

    // Get all necessary environment variables of logged in user
    // to pass them to the process

    bRet = CreateEnvironmentBlock(&lpEnvironment, // Environment block
                                hDupToken,        // New token
                                FALSE);           // Inheritence
    if(!bRet)
    {
        //wsprintf(szErr, L"CreateEnvironmentBlock Error: %d", GetLastError());
        return;
    }

    HDESK hdeskInput=OpenInputDesktop(0, FALSE, 0); // does not set GetLastError(), so GetLastError() is arbitrary if NULL is returned
    if( hdeskInput==NULL ) {
        TRACE( "hdeskInput==NULL" );
        return false;
    }

    // Initialize Startup and Process info  
    startupInfo->cb = sizeof(STARTUPINFO);
    startupInfo->lpDesktop = TEXT("winsta0\\default");



    // Start the process on behalf of the current user 

    BOOL returnCode = CreateProcessAsUser(hDupToken, 
                                applicationName, 
                                commandLine, 
                                NULL,
                                NULL,
                                FALSE,
                                NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE | CREATE_UNICODE_ENVIRONMENT,
                                lpEnvironment,
                                NULL,
                                startupInfo,
                                &processInformation);

谢谢， F

Answer 1

这里有完整的工作代码来做你想做的事

//Function to run a process as active user from windows service
void ImpersonateActiveUserAndRun(WCHAR* path, WCHAR* args)
{
    DWORD session_id = -1;
    DWORD session_count = 0;

    WTS_SESSION_INFOA *pSession = NULL;


    if (WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pSession, &session_count))
    {
        //log success
    }
    else
    {
        //log error
        return;
    }

    for (int i = 0; i < session_count; i++)
    {
        session_id = pSession[i].SessionId;

        WTS_CONNECTSTATE_CLASS wts_connect_state = WTSDisconnected;
        WTS_CONNECTSTATE_CLASS* ptr_wts_connect_state = NULL;

        DWORD bytes_returned = 0;
        if (::WTSQuerySessionInformation(
            WTS_CURRENT_SERVER_HANDLE,
            session_id,
            WTSConnectState,
            reinterpret_cast<LPTSTR*>(&ptr_wts_connect_state),
            &bytes_returned))
        {
            wts_connect_state = *ptr_wts_connect_state;
            ::WTSFreeMemory(ptr_wts_connect_state);
            if (wts_connect_state != WTSActive) continue;
        }
        else
        {
            //log error
            continue;
        }

        HANDLE hImpersonationToken;

        if (!WTSQueryUserToken(session_id, &hImpersonationToken))
        {
            //log error
            continue;
        }


        //Get real token from impersonation token
        DWORD neededSize1 = 0;
        HANDLE *realToken = new HANDLE;
        if (GetTokenInformation(hImpersonationToken, (::TOKEN_INFORMATION_CLASS) TokenLinkedToken, realToken, sizeof(HANDLE), &neededSize1))
        {
            CloseHandle(hImpersonationToken);
            hImpersonationToken = *realToken;
        }
        else
        {
            //log error
            continue;
        }


        HANDLE hUserToken;

        if (!DuplicateTokenEx(hImpersonationToken,
            //0,
            //MAXIMUM_ALLOWED,
            TOKEN_ASSIGN_PRIMARY | TOKEN_ALL_ACCESS | MAXIMUM_ALLOWED,
            NULL,
            SecurityImpersonation,
            TokenPrimary,
            &hUserToken))
        {
            //log error
            continue;
        }

        // Get user name of this process
        //LPTSTR pUserName = NULL;
        WCHAR* pUserName;
        DWORD user_name_len = 0;

        if (WTSQuerySessionInformationW(WTS_CURRENT_SERVER_HANDLE, session_id, WTSUserName, &pUserName, &user_name_len))
        {
            //log username contained in pUserName WCHAR string
        }

        //Free memory                         
        if (pUserName) WTSFreeMemory(pUserName);

        ImpersonateLoggedOnUser(hUserToken);

        STARTUPINFOW StartupInfo;
        GetStartupInfoW(&StartupInfo);
        StartupInfo.cb = sizeof(STARTUPINFOW);
        //StartupInfo.lpDesktop = "winsta0\\default";

        PROCESS_INFORMATION processInfo;

        SECURITY_ATTRIBUTES Security1;
        Security1.nLength = sizeof SECURITY_ATTRIBUTES;

        SECURITY_ATTRIBUTES Security2;
        Security2.nLength = sizeof SECURITY_ATTRIBUTES;

        void* lpEnvironment = NULL;

        // Get all necessary environment variables of logged in user
        // to pass them to the new process
        BOOL resultEnv = CreateEnvironmentBlock(&lpEnvironment, hUserToken, FALSE);
        if (!resultEnv)
        {
            //log error
            continue;
        }

        WCHAR PP[1024]; //path and parameters
        ZeroMemory(PP, 1024 * sizeof WCHAR);
        wcscpy(PP, path);
        wcscat(PP, L" ");
        wcscat(PP, args);

        // Start the process on behalf of the current user 
        BOOL result = CreateProcessAsUserW(hUserToken, 
            NULL,
            PP,
            //&Security1,
            //&Security2,
            NULL,
            NULL,
            FALSE, 
            NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE,
            //lpEnvironment,
            NULL,
            //"C:\\ProgramData\\some_dir",
            NULL,
            &StartupInfo,
            &processInfo);

        if (!result)
        {
            //log error
        }
        else
        {
            //log success
        }

        DestroyEnvironmentBlock(lpEnvironment);

        CloseHandle(hImpersonationToken);
        CloseHandle(hUserToken);
        CloseHandle(realToken);

        RevertToSelf();
    }

    WTSFreeMemory(pSession);
}

Answer 2

什么是启动服务以创建新流程，因为这与合适的答案有关？ WTSGetActiveConsoleSessionId 获取当前物理控制台会话的会话 ID，而不是您意义上的“活动”会话 ID。对于终端服务，可能有许多不同的用户都连接到不同的会话，因此您不能只选择一个并希望，但实际上可能有也可能没有实际登录的用户。

一种方法是使用WTSEnumerateSessions 列出所有活动会话并尝试找到您真正想要的会话，您可以使用WTSQuerySessionInformation 之类的名称来获取该会话的用户名。

如果您的服务这样做是为了响应您的用户帐户的某些请求（而不是对某些自动事件采取行动），那么如果您使用诸如 RPC/Named Pipes/DCOM 等之类的东西，您总是可以模拟用户（假设安全性设置为允许非匿名/识别模拟）并将线程的令牌复制到主令牌并使用它。

Answer 3

经过大量谷歌搜索后，我能够找到解决问题的方法。

这是我找到解决方案的链接。 http://www.codeproject.com/KB/vista-security/interaction-in-vista.aspx

感谢每一位试图帮助我的人。