Question

我想用c ++创建一个Windows服务，每次用户登录时都以管理员身份启动我的程序而不弹出UAC窗口因为这是我第一次这样做，所以我使用了这里的项目：https://code.msdn.microsoft.com/windowsapps/CppWindowsService-cacf4948/view/SourceCode

我在CppWindowsService.cpp中编辑了第74行：

InstallService(
        SERVICE_NAME,               // Name of service
        SERVICE_DISPLAY_NAME,       // Name to display
        SERVICE_AUTO_START,         // Service start type
        SERVICE_DEPENDENCIES,       // Dependencies
        0,            // Service running account
        SERVICE_PASSWORD            // Password of the account
        );

并在SampleService.cpp第101行的工作线程中添加了一些代码，如下所示：

 void CSampleService::ServiceWorkerThread(void)
{
// Periodically check if the service is stopping.
PSID gpSidMIL_High;
ConvertStringSidToSidW(L"S-1-16-12288", &gpSidMIL_High);
DWORD userSessionID = WTSGetActiveConsoleSessionId();
HANDLE hToken, hToken2;


if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) WriteEventLogEntry(L"OpenProcessToken failed error", EVENTLOG_ERROR_TYPE);
if (!DuplicateTokenEx(hToken, MAXIMUM_ALLOWED, NULL, SecurityIdentification, TokenPrimary, &hToken2)) WriteEventLogEntry(L"DuplicateTokenEx error", EVENTLOG_ERROR_TYPE);

if (!SetTokenInformation(hToken2, TokenSessionId, &userSessionID, sizeof(userSessionID))) WriteEventLogEntry(L"SetTokenInformation 1 error", EVENTLOG_ERROR_TYPE);

DWORD dwUIAccess = 1;
if (!SetTokenInformation(hToken2, TokenUIAccess, &dwUIAccess, sizeof(dwUIAccess))) WriteEventLogEntry(L"SetTokenInformation 2 error", EVENTLOG_ERROR_TYPE);

//Set "high" mandatory integrity level
TOKEN_MANDATORY_LABEL tml = { 0 };
tml.Label.Attributes = SE_GROUP_INTEGRITY;
tml.Label.Sid = gpSidMIL_High;

if (!SetTokenInformation(hToken2, TokenIntegrityLevel, &tml, sizeof(TOKEN_MANDATORY_LABEL) + ::GetSidLengthRequired(1))) WriteEventLogEntry(L"SetTokenInformation 3 error", EVENTLOG_ERROR_TYPE);
LPVOID pEnv = 0;
if (!CreateEnvironmentBlock(&pEnv, hToken2, FALSE)) WriteEventLogEntry(L"CreateEnvironmentBlock error", EVENTLOG_ERROR_TYPE);

if (!ImpersonateLoggedOnUser(hToken2)) WriteEventLogEntry(L"ImpersonateLoggedOnUser error", EVENTLOG_ERROR_TYPE);

while (!m_fStopping)
{
     STARTUPINFO stinfo = { 0 };
   PROCESS_INFORMATION pinfo = { 0 };
   stinfo.cb = sizeof(stinfo);
   stinfo.lpDesktop = L"winsta0\\default";
   if (!CreateProcessAsUserW(hToken2, L"path to exe that shows a message box", 0, 0, 0, FALSE, CREATE_UNICODE_ENVIRONMENT|CREATE_BREAKAWAY_FROM_JOB, pEnv, L"cwd of the exe file", &stinfo, &pinfo))
   {
// after debugging I found that the error is coming from here 
       std::wstring error = L"CreateProcessAsUserW failed with error : ";
       error += std::to_wstring(GetLastError());
       WriteEventLogEntry(wcsdup(error.c_str()), EVENTLOG_ERROR_TYPE);
       Sleep(10000);
   }
   while (!m_fStopping && pinfo.hProcess)
   {
       if(WaitForSingleObject(pinfo.hProcess, 1000) != WAIT_TIMEOUT) break;
   }
   // ::Sleep(2000);  // Simulate some lengthy operations.
}

问题是此服务在重新启动Windows或通过sc.exe或服务控制管理器手动启动后运行良好，但在从先前关闭启动后却无法运行当我关机然后启动计算机我可以看到在任务管理器中运行的服务的exe，所以我知道该服务正在运行，并且有一个错误来自一个函数，我使用了Windows事件并记录了错误，我终于找到了该错误来自CreateProcessAsUser，返回错误5（拒绝访问）我不知道这里的问题在哪里，因为服务在重启或手动启动后运行良好

Answer 1

在快速启动过程中不会调用

ServiceMain 。使用快速启动时，会话0（包括内核，驱动程序，所有服务）未终止。当您关闭并继续运行时，它会休眠会话0，就像通过用户注销挂起VirtualMachine一样。因此，您的服务将保持状态，而无需再次启动。

一种简单的处理方法：处理 SERVICE_ACCEPT_SESSIONCHANGE 控制代码。

这里是一个例子。

SERVICE_STATUS gSvcStatus;
DWORD WINAPI HandleCtrlEx(
    DWORD dwControl,
    DWORD dwEventType,
    LPVOID lpEventData,
    LPVOID lpContext
)
{
    // Handle the requested control code. 
    switch (dwControl)
    {
        case SERVICE_CONTROL_SHUTDOWN:
        case SERVICE_CONTROL_STOP:
            ReportSvcStatus(SERVICE_STOP_PENDING, NO_ERROR, 0);

            // Signal the service to stop.

            SetEvent(ghSvcStopEvent);
            ReportSvcStatus(gSvcStatus.dwCurrentState, NO_ERROR, 0);

            break;

        case SERVICE_CONTROL_SESSIONCHANGE:
            if (dwEventType == WTS_SESSION_LOGON) {
                DWORD *data = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DWORD));
                *data = ((PWTSSESSION_NOTIFICATION)lpEventData)->dwSessionId;
                HANDLE hThread = CreateThread(NULL, 0, RunProgram, data, 0, NULL);// remember to free memory in RunProgram
                if (!hThread) {
                    PrintLogA(LOG"can't create thread,error:%u", GetLastError());
                }
                else {
                    CloseHandle(hThread);
                }
            }
            break;

        default:
            break;
    }
    return NO_ERROR;
}

VOID ReportSvcStatus(DWORD dwCurrentState,
    DWORD dwWin32ExitCode,
    DWORD dwWaitHint)
{
    static DWORD dwCheckPoint = 1;

    // Fill in the SERVICE_STATUS structure.

    gSvcStatus.dwCurrentState = dwCurrentState;
    gSvcStatus.dwWin32ExitCode = dwWin32ExitCode;
    gSvcStatus.dwWaitHint = dwWaitHint;

    if (dwCurrentState == SERVICE_START_PENDING)
        gSvcStatus.dwControlsAccepted = 0;
    else {
        gSvcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
        gSvcStatus.dwControlsAccepted |= SERVICE_ACCEPT_SESSIONCHANGE;// <--- remember add this.
    }

    if ((dwCurrentState == SERVICE_RUNNING) ||
        (dwCurrentState == SERVICE_STOPPED))
        gSvcStatus.dwCheckPoint = 0;
    else gSvcStatus.dwCheckPoint = dwCheckPoint++;

    // Report the status of the service to the SCM.
    SetServiceStatus(gSvcStatusHandle, &gSvcStatus);
}

VOID SvcInit(DWORD dwArgc, LPTSTR *lpszArgv)
{
    ghSvcStopEvent = CreateEvent(
        NULL,    // default security attributes
        TRUE,    // manual reset event
        FALSE,   // not signaled
        NULL);   // no name

    if (ghSvcStopEvent == NULL)
    {
        ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, 0);
        return;
    }

    // Report running status when initialization is complete.
    ReportSvcStatus(SERVICE_RUNNING, NO_ERROR, 0);

    RunProgram();

    // Check whether to stop the service.
    WaitForSingleObject(ghSvcStopEvent, INFINITE);
    ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, 0);
    return;
}

VOID WINAPI SvcMain(DWORD dwArgc, LPTSTR *lpszArgv){
    // Register the handler function for the service
    gSvcStatusHandle = RegisterServiceCtrlHandlerEx(
        SVCNAME,
        HandleCtrlEx,
        NULL);
    if (!gSvcStatusHandle)
    {
        SvcReportEventA(LOG"RegisterServiceCtrlHandler failed");
        return;
    }

    // These SERVICE_STATUS members remain as set here

    gSvcStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
    gSvcStatus.dwServiceSpecificExitCode = 0;
    // Report initial status to the SCM

    ReportSvcStatus(SERVICE_START_PENDING, NO_ERROR, 3000);

    // Perform service-specific initialization and work.

    SvcInit(dwArgc, lpszArgv);
}

Answer 2

这些是要初始化的类的成员：

PSID gpSidMIL_High = 0;
DWORD userSessionID = 0;
HANDLE hToken = 0, hToken2 = 0;
DWORD dwUIAccess = 1;
TOKEN_MANDATORY_LABEL tml = { 0 };
LPVOID pEnv = 0;
STARTUPINFO stinfo = { 0 };
PROCESS_INFORMATION pinfo = { 0 };

在受保护的方法中我制作了这个方法：

void intialize();

这是功能：

void CSampleService::intialize() {
// the members may were used before , without assigning them to zero again all the functions below will fail , I don't know why ?
gpSidMIL_High = 0;
userSessionID = 0;
hToken = 0, hToken2 = 0;
dwUIAccess = 1;
tml = { 0 };
pEnv = 0;
stinfo = { 0 };
pinfo = { 0 };

WriteEventLogEntry(L"initializing", EVENTLOG_INFORMATION_TYPE);

ConvertStringSidToSidW(L"S-1-16-12288", &gpSidMIL_High);
userSessionID = WTSGetActiveConsoleSessionId();

if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) WriteErrorLogEntry(L"OpenProcessToken");
if (!DuplicateTokenEx(hToken, MAXIMUM_ALLOWED, NULL, SecurityIdentification, TokenPrimary, &hToken2)) WriteErrorLogEntry(L"DuplicateTokenEx error");

if (!SetTokenInformation(hToken2, TokenSessionId, &userSessionID, sizeof(userSessionID))) WriteErrorLogEntry(L"SetTokenInformation 1 error");

if (!SetTokenInformation(hToken2, TokenUIAccess, &dwUIAccess, sizeof(dwUIAccess))) WriteErrorLogEntry(L"SetTokenInformation 2");

//Set "high" mandatory integrity level
//TOKEN_MANDATORY_LABEL tml = { 0 };
tml.Label.Attributes = SE_GROUP_INTEGRITY;
tml.Label.Sid = gpSidMIL_High;

if (!SetTokenInformation(hToken2, TokenIntegrityLevel, &tml, sizeof(TOKEN_MANDATORY_LABEL) + ::GetSidLengthRequired(1))) WriteErrorLogEntry(L"SetTokenInformation 3");
LPVOID pEnv = 0;
if (!CreateEnvironmentBlock(&pEnv, hToken2, FALSE)) WriteErrorLogEntry(L"CreateEnvironmentBlock");
 }

最后在工作线程中：

void CSampleService::ServiceWorkerThread(void)
{
WriteEventLogEntry(L"the thread of the service started", EVENTLOG_INFORMATION_TYPE);
intialize();
while (!m_fStopping)
{
stinfo.cb = sizeof(stinfo);
   stinfo.lpDesktop = L"winsta0\\default";
   // the service starts from here after fast boot
   if (!CreateProcessAsUserW(hToken2, L"C:\\Users\\user\\Desktop\\ConEmuTrap\\test.exe", 0, 0, 0, FALSE, CREATE_UNICODE_ENVIRONMENT | CREATE_BREAKAWAY_FROM_JOB, pEnv, L"C:\\Users\\user\\Desktop\\ConEmuTrap", &stinfo, &pinfo))
   {
       WriteErrorLogEntry(L"CreateProcessAsUserW 1");
       intialize();
   }
   while (!m_fStopping && pinfo.hProcess)
   {
       if(WaitForSingleObject(pinfo.hProcess, 1000) != WAIT_TIMEOUT) break;
   }
 }

Windows关闭后再启动c ++服务无法启动

2 个答案: