andre@1010: #include <windows.h>
andre@1010: #include "exdll.h"
andre@1010: #include "util.h"
andre@1010: #include "logging.h"
andre@1010: 
andre@1010: static HINSTANCE g_hInstance; /* Our Instance. */
andre@1010: static HWND g_hwndParent;     /* Handle of parent window or NULL. */
andre@1010: 
andre@1010: #define UNUSED(x) (void)(x)
andre@1010: 
andre@1010: /* Standard entry point for DLLs. */
andre@1010: int WINAPI
andre@1010: DllMain (HANDLE hinst, DWORD reason, LPVOID reserved)
andre@1010: {
andre@1010:   UNUSED(reserved);
andre@1010:   if (reason == DLL_PROCESS_ATTACH)
andre@1010:     g_hInstance = hinst;
andre@1010:   return TRUE;
andre@1010: }
andre@1010: 
andre@1010: void __declspec(dllexport) __cdecl Exec(HWND hwndParent,
andre@1010:                                         int string_size,
andre@1010:                                         char *variables,
andre@1010:                                         stack_t **stacktop)
andre@1010: {
andre@1010:   HANDLE restricted_token = NULL;
andre@1010:   STARTUPINFO si;
andre@1010:   PROCESS_INFORMATION pi;
andre@1010: 
andre@1010:   EXDLL_INIT();
andre@1010: 
andre@1010:   UNUSED(hwndParent);
andre@1010:   UNUSED(g_hwndParent);
andre@1010: 
andre@1010:   memset(&si, 0, sizeof(STARTUPINFO));
andre@1010: 
andre@1010:   if (!stacktop || !*stacktop || !(*stacktop)->text)
andre@1010:     {
andre@1010:       ERRORPRINTF ("Invalid call to exec\n");
andre@1010:       return;
andre@1010:     }
andre@1010: 
andre@1010:   restricted_token = get_normal_token();
andre@1010: 
andre@1010:   if (restricted_token == NULL || restricted_token == INVALID_HANDLE_VALUE)
andre@1010:     {
andre@1010:       ERRORPRINTF ("Failed to obtain restricted token.\n");
andre@1010:       return;
andre@1010:     }
andre@1010: 
andre@1010:   if (CreateProcessAsUser(restricted_token,
andre@1010:                           0,
andre@1010:                           (*stacktop)->text,
andre@1010:                           0,
andre@1010:                           0,
andre@1010:                           FALSE,
andre@1010:                           CREATE_NEW_CONSOLE,
andre@1010:                           0,
andre@1010:                           0,
andre@1010:                           &si,
andre@1010:                           &pi))
andre@1010:     {
andre@1010:       CloseHandle(pi.hProcess);
andre@1010:       CloseHandle(pi.hThread);
andre@1010:     }
andre@1010: }
andre@1010: