static DWORD WINAPI password_thread()

in native/os/win32/system.c [83:158]

• 64 lines of code
• 10 McCabe index (conditional complexity)

static DWORD WINAPI password_thread(void *data)
{
    tcn_pass_cb_t *cb = (tcn_pass_cb_t *)data;
    MSG     msg;
    HWINSTA hwss;
    HWINSTA hwsu;
    HDESK   hwds;
    HDESK   hwdu;
    HWND    hwnd;

    /* Ensure connection to service window station and desktop, and
     * save their handles.
     */
    GetDesktopWindow();
    hwss = GetProcessWindowStation();
    hwds = GetThreadDesktop(GetCurrentThreadId());

    /* Impersonate the client and connect to the User's
     * window station and desktop.
     */
    hwsu = OpenWindowStation("WinSta0", FALSE, MAXIMUM_ALLOWED);
    if (hwsu == NULL) {
        ExitThread(1);
        return 1;
    }
    SetProcessWindowStation(hwsu);
    hwdu = OpenDesktop("Default", 0, FALSE, MAXIMUM_ALLOWED);
    if (hwdu == NULL) {
        SetProcessWindowStation(hwss);
        CloseWindowStation(hwsu);
        ExitThread(1);
        return 1;
    }
    SetThreadDesktop(hwdu);

    hwnd = CreateDialog(dll_instance, MAKEINTRESOURCE(1001), NULL, NULL);
    if (hwnd != NULL)
        ShowWindow(hwnd, SW_SHOW);
    else  {
        ExitThread(1);
        return 1;
    }
    while (1) {
        if (PeekMessage(&msg, hwnd, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_KEYUP) {
                int nVirtKey = (int)msg.wParam;
                if (nVirtKey == VK_ESCAPE) {
                    DestroyWindow(hwnd);
                    break;
                }
                else if (nVirtKey == VK_RETURN) {
                    HWND he = GetDlgItem(hwnd, 1002);
                    if (he) {
                        int n = GetWindowText(he, cb->password, SSL_MAX_PASSWORD_LEN - 1);
                        cb->password[n] = '\0';
                    }
                    DestroyWindow(hwnd);
                    break;
                }
            }
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
            Sleep(100);
    }
    /* Restore window station and desktop.
     */
    SetThreadDesktop(hwds);
    SetProcessWindowStation(hwss);
    CloseDesktop(hwdu);
    CloseWindowStation(hwsu);

    ExitThread(0);
    return 0;
}