112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
#include <stdio.h>
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#include <inject.h>
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#include <envs.h>
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#include <game_p.h>
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typedef char *(*wgufn_t)(wchar_t* path); // wine_get_unix_file_name
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const wchar_t *J_MB_TITLE = L"Jadeite Launcher Payload";
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BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID reserved) {
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// Only listen for attach
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if (reason != DLL_PROCESS_ATTACH) {
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return TRUE;
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}
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// Get target EXE path
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wchar_t targetExe[MAX_PATH];
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GetEnvironmentVariableW(ENV_EXE_PATH, targetExe, MAX_PATH);
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// Get the path of the DLL to inject
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wchar_t injectDll[MAX_PATH];
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GetEnvironmentVariableW(ENV_DLL_PATH, injectDll, MAX_PATH);
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// Get game commandline
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wchar_t cmdline[8192];
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GetEnvironmentVariableW(ENV_PROC_CMD, cmdline, sizeof(cmdline) / sizeof(wchar_t));
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// Compute the working directory path
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wchar_t workdir[MAX_PATH];
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wcscpy(workdir, targetExe);
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*(wcsrchr(workdir, '\\')) = '\0';
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// SAFETY: verify that the injector is not inside the game directory
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HMODULE kernel32 = GetModuleHandleA("kernel32.dll");
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wgufn_t wine_get_unix_file_name = (wgufn_t)GetProcAddress(kernel32, "wine_get_unix_file_name");
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if (wine_get_unix_file_name) {
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char *unixInjectDll = wine_get_unix_file_name(injectDll);
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char *unixWorkdir = wine_get_unix_file_name(workdir);
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char *i = unixInjectDll, *w = unixWorkdir;
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char startsWith = 0;
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while (*i && *w) {
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startsWith = *i == *w;
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if (!startsWith) break;
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i++, w++;
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}
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HANDLE heap = GetProcessHeap();
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HeapFree(heap, 0, unixInjectDll);
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HeapFree(heap, 0, unixWorkdir);
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if (startsWith) {
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MessageBoxW(NULL, L"Putting the patcher (or any other foreign PE binaries) inside the game directory is dangerous! Please move it elsewhere.", J_MB_TITLE, MB_OK | MB_ICONERROR);
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exit(1);
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}
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} else {
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MessageBoxW(NULL, L"Could not find wine_get_unix_file_name! Wine version too old?", J_MB_TITLE, MB_OK | MB_ICONWARNING);
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}
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// Start the game
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STARTUPINFOW si;
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ZeroMemory(&si, sizeof(si));
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PROCESS_INFORMATION pi;
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si.cb = sizeof(si);
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ZeroMemory(&pi, sizeof(pi));
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if (!CreateProcessW(
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NULL,
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cmdline,
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NULL,
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NULL,
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FALSE,
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CREATE_SUSPENDED,
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NULL,
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workdir,
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&si,
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&pi
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)) {
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wchar_t message[1024];
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wsprintfW(message, L"Failed to start game process: %ld", GetLastError());
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MessageBoxW(NULL, message, J_MB_TITLE, MB_OK | MB_ICONERROR);
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exit(1);
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}
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// Inject
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void *payloadStart = &_binary_game_p_o_p_game_p_bin_start;
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size_t payloadSize = (size_t)&_binary_game_p_o_p_game_p_bin_size;
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inject(pi.hProcess, payloadStart, payloadSize, injectDll);
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// Optional: wait for user input before resuming (useful for debugging)
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char *waitEnabled = getenv("WAIT_BEFORE_RESUME");
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if (waitEnabled && *waitEnabled) {
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wchar_t message[64];
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wsprintfW(message, L"PID: %ld. Press OK to continue", pi.dwProcessId);
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MessageBoxW(NULL, message, J_MB_TITLE, MB_OK | MB_ICONINFORMATION);
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}
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// Resume the process
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ResumeThread(pi.hThread);
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// The launcher process should now hang untill the game terminates
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WaitForSingleObject(pi.hProcess, INFINITE);
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return TRUE;
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}
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