QtService实现Qt后台服务程序其二

后台服务程序其二"/>

QtService实现Qt后台服务程序其二

——接上篇——

启动外部exe无窗口异常的解决，Qt5.9.2亲测通过

1、背景

Windows下服务直接启动窗口程序时，在任务管理器中可以看到窗口程序正在运行，但是桌面上并没有显示出窗口。

这是因为在Windows XP、Windows Server 2003 或早期Windows 系统时代，当第一个用户登录系统后服务和应用程序是在同一个Session 中运行的，也就是Session 0。

但是这种运行方式提高了系统安全风险，因为服务是通过提升了用户权限运行的，而应用程序往往是那些不具备管理员身份的普通用户运行的，其中的危险显而易见。

所以从Vista 开始Session 0 中只包含系统服务，其他应用程序则通过分离的Session 运行，将服务与应用程序隔离提高系统的安全性。这样使得Session 0 与其他Session 之间无法进行交互，不能通过服务向桌面用户弹出信息窗口、UI 窗口等信息。

这个时候如果想让我们的界面程序被服务启动就必须穿透Session 0 隔离。在实际开发过程中，可以通过Process Explorer检查服务或程序处于哪个Session，会不会遇到Session 0 隔离问题。

        下面就是穿透Session 0 隔离及服务启动窗口程序的步骤：

        1、使用OpenProcessToken函数来打开与服务进程相关联的访问令牌；

        2、使用DuplicateTokenEx函数创建一个新的访问令牌来复制一个已经存在的标记；

        3、使用SetTokenInformation函数把服务token的SessionId替换成当前活动的Session；

        4、使用CreateEnvironmentBlock函数创建进程环境块；

        5、使用CreateProcessAsUser函数在活动的Session下创建进程

2、Demo说明

加入WtsApi32.lib，Userenv.lib库等，解决QService启动外部进程没有GUI的问题

.pro加入代码：

#WtsApi32.lib，Userenv.lib库等，解决QService启动外部进程没有GUI的问题
LIBS += \#-L$$DESTDIR \-lWtsApi32 \-lAdvApi32 \-lUserEnv

加入ProcessLoader类

processloader.h代码：

#ifndef PROCESSLOADER_H
#define PROCESSLOADER_H#include <QObject>//解决QService启动外部进程没有GUI的问题class ProcessLoader
{
public:ProcessLoader();~ProcessLoader();public:#ifdef Q_OS_WINstatic bool LaunchAppIntoDifferentSession(std::wstring command);//方式2
#endif};#endif // PROCESSLOADER_H

processloader.cpp代码：

#include "processloader.h"#ifdef Q_OS_WIN#include <Windows.h>
#include <WinBase.h>
#include <WtsApi32.h>
#include <UserEnv.h>
#include <tchar.h>#endifProcessLoader::ProcessLoader()
{}ProcessLoader::~ProcessLoader()
{}#ifdef Q_OS_WIN#include <tlhelp32.h>
bool ProcessLoader::LaunchAppIntoDifferentSession(std::wstring command)
{PROCESS_INFORMATION pi;STARTUPINFO si;BOOL bResult = FALSE;DWORD dwSessionId,winlogonPid;HANDLE hUserToken=INVALID_HANDLE_VALUE,hUserTokenDup=INVALID_HANDLE_VALUE,hPToken=INVALID_HANDLE_VALUE,hProcess=INVALID_HANDLE_VALUE;DWORD dwCreationFlags;int errorcode;//whl2023-10-18LPVOID pEnv =NULL;TCHAR commandLine[MAX_PATH];// Log the client on to the local computer.dwSessionId = WTSGetActiveConsoleSessionId();//// Find the winlogon processPROCESSENTRY32 procEntry;HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);if (hSnap == INVALID_HANDLE_VALUE){return false ;}procEntry.dwSize = sizeof(PROCESSENTRY32);if (!Process32First(hSnap, &procEntry)){return false ;}do{if (_wcsicmp(procEntry.szExeFile, L"winlogon.exe") == 0){// We found a winlogon process...// make sure it's running in the console sessionDWORD winlogonSessId = 0;if (ProcessIdToSessionId(procEntry.th32ProcessID, &winlogonSessId)&& winlogonSessId == dwSessionId){winlogonPid = procEntry.th32ProcessID;break;}}} while (Process32Next(hSnap, &procEntry));WTSQueryUserToken(dwSessionId,&hUserToken);dwCreationFlags = NORMAL_PRIORITY_CLASS|CREATE_NEW_CONSOLE;ZeroMemory(&si, sizeof(STARTUPINFO));si.cb= sizeof(STARTUPINFO);si.lpDesktop = L"winsta0\\default";ZeroMemory(&pi, sizeof(pi));TOKEN_PRIVILEGES tp;LUID luid;hProcess = OpenProcess(MAXIMUM_ALLOWED,FALSE,winlogonPid);if(!::OpenProcessToken(hProcess,TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY|TOKEN_DUPLICATE|TOKEN_ASSIGN_PRIMARY|TOKEN_ADJUST_SESSIONID|TOKEN_READ|TOKEN_WRITE,&hPToken)){errorcode = GetLastError();printf("Process token open Error: %u\n",GetLastError());//goto ToFree;//whl2023-10-18}if (!LookupPrivilegeValue(NULL,SE_DEBUG_NAME,&luid)){printf("Lookup Privilege value Error: %u\n",GetLastError());//goto ToFree;//whl2023-10-18}tp.PrivilegeCount =1;tp.Privileges[0].Luid =luid;tp.Privileges[0].Attributes =SE_PRIVILEGE_ENABLED;DuplicateTokenEx(hPToken,MAXIMUM_ALLOWED,NULL,SecurityIdentification,TokenPrimary,&hUserTokenDup);errorcode = GetLastError();// Adjust Token privilegeSetTokenInformation(hUserTokenDup,TokenSessionId,(void*)dwSessionId,sizeof(DWORD));if (!AdjustTokenPrivileges(hUserTokenDup,FALSE,&tp,sizeof(TOKEN_PRIVILEGES),(PTOKEN_PRIVILEGES)NULL,NULL)){errorcode = GetLastError();printf("Adjust Privilege value Error: %u\n",GetLastError());//goto ToFree;//whl2023-10-18}if (GetLastError() == ERROR_NOT_ALL_ASSIGNED){printf("Token does not have the provilege\n");//goto ToFree;//whl2023-10-18}if(CreateEnvironmentBlock(&pEnv,hUserTokenDup,TRUE)){dwCreationFlags|=CREATE_UNICODE_ENVIRONMENT;}elsepEnv=NULL;// Launch the process in the client's logon session._tcscpy_s(commandLine, MAX_PATH, command.c_str());bResult = CreateProcessAsUser(hUserTokenDup,                     // client's access token//_T("cmd.exe"),        // file to execute//NULL,                 // command lineNULL,                   // file to execute(LPWSTR)(commandLine),  // command lineNULL,            // pointer to process SECURITY_ATTRIBUTESNULL,               // pointer to thread SECURITY_ATTRIBUTESFALSE,              // handles are not inheritabledwCreationFlags,     // creation flagspEnv,               // pointer to new environment blockNULL,               // name of current directory&si,               // pointer to STARTUPINFO structure&pi                // receives information about new process);// End impersonation of client.// GetLastError Shud be 0errorcode = GetLastError();bResult = true;// Perform All the Close Handles tasks
ToFree:{if(hProcess != INVALID_HANDLE_VALUE){CloseHandle(hProcess);}if(hUserToken != INVALID_HANDLE_VALUE){CloseHandle(hUserToken);}if(hUserTokenDup != INVALID_HANDLE_VALUE){CloseHandle(hUserTokenDup);}if(hPToken != INVALID_HANDLE_VALUE){CloseHandle(hPToken);}}return bResult;
}#endif

调用方式举例：

//要启动的进程名
#define PROCESS_NAME "EDU_CLIENT.exe"
QString str_app_name = PROCESS_NAME;
#ifdef Q_OS_WINstd::wstring command = str_app_name.toStdWString();if (ProcessLoader::LaunchAppIntoDifferentSession(command) == false) {qDebug() << "Failed to launch " << command.c_str();}
#endif

附：

亲测无效方式1：

bool ProcessLoader::ServerRunWndProcess(std::wstring command)
{TCHAR commandLine[MAX_PATH];HANDLE hToken = NULL;if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)){return false;}HANDLE hTokenDup = NULL;bool bRet = DuplicateTokenEx(hToken, TOKEN_ALL_ACCESS, NULL, SecurityIdentification, TokenPrimary, &hTokenDup);if (!bRet || hTokenDup == NULL){CloseHandle(hToken);return false;}DWORD dwSessionId = WTSGetActiveConsoleSessionId();//把服务hToken的SessionId替换成当前活动的Session(即替换到可与用户交互的winsta0下)if (!SetTokenInformation(hTokenDup, TokenSessionId, &dwSessionId, sizeof(DWORD))){DWORD nErr = GetLastError();CloseHandle(hTokenDup);CloseHandle(hToken);return false;}STARTUPINFO si;ZeroMemory(&si, sizeof(STARTUPINFO));si.cb = sizeof(STARTUPINFO);si.lpDesktop = _T("WinSta0\\Default");si.wShowWindow = SW_SHOW;si.dwFlags = STARTF_USESHOWWINDOW /*|STARTF_USESTDHANDLES*/;//创建进程环境块LPVOID pEnv = NULL;bRet = CreateEnvironmentBlock(&pEnv, hTokenDup, FALSE);if (!bRet){CloseHandle(hTokenDup);CloseHandle(hToken);return false;}if (pEnv == NULL){CloseHandle(hTokenDup);CloseHandle(hToken);return false;}//在活动的Session下创建进程PROCESS_INFORMATION processInfo;ZeroMemory(&processInfo, sizeof(PROCESS_INFORMATION));DWORD dwCreationFlag = NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE | CREATE_UNICODE_ENVIRONMENT;_tcscpy_s(commandLine, MAX_PATH, command.c_str());if (!CreateProcessAsUser(hTokenDup, NULL, (LPWSTR)(commandLine) , NULL, NULL, FALSE, dwCreationFlag, pEnv, NULL, &si, &processInfo)){DWORD nRet = GetLastError();CloseHandle(hTokenDup);CloseHandle(hToken);return false;}DestroyEnvironmentBlock(pEnv);CloseHandle(hTokenDup);CloseHandle(hToken);return true;
}

亲测无效方式2：

bool ProcessLoader::loadWindowsApplication(std::wstring command)
{BOOL bResult = FALSE;DWORD dwSessionId = WTSGetActiveConsoleSessionId();if (dwSessionId == 0xFFFFFFFF){return false;}HANDLE hUserToken = NULL;if (WTSQueryUserToken(dwSessionId, &hUserToken) == FALSE){DWORD error = GetLastError();return false;}HANDLE hTheToken = NULL;if (DuplicateTokenEx(hUserToken, TOKEN_ASSIGN_PRIMARY | TOKEN_ALL_ACCESS, 0, SecurityImpersonation, TokenPrimary, &hTheToken) == TRUE){if (ImpersonateLoggedOnUser(hTheToken) == TRUE){DWORD dwCreationFlags = HIGH_PRIORITY_CLASS | CREATE_NEW_CONSOLE;STARTUPINFO si = { sizeof(si) };PROCESS_INFORMATION pi;SECURITY_ATTRIBUTES Security1 = { sizeof(Security1) };SECURITY_ATTRIBUTES Security2 = { sizeof(Security2) };LPVOID pEnv = NULL;if (CreateEnvironmentBlock(&pEnv, hTheToken, TRUE) == TRUE){dwCreationFlags |= CREATE_UNICODE_ENVIRONMENT;}TCHAR commandLine[MAX_PATH];_tcscpy_s(commandLine, MAX_PATH, command.c_str());// Launch the process in the client's logon session.bResult = CreateProcessAsUser(hTheToken,NULL,   // (LPWSTR)(path),(LPWSTR)(commandLine),&Security1,&Security2,FALSE,dwCreationFlags,pEnv,NULL,&si,&pi);RevertToSelf();if (pEnv){DestroyEnvironmentBlock(pEnv);}}CloseHandle(hTheToken);}CloseHandle(hUserToken);return bResult==TRUE;
}