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LibraryHijacker/dllmain.cpp

@@ -6,14 +6,16 @@
 #include <CString>
 #include <atlstr.h>
 #include "../MinHook/include/MinHook.h"
+#include "pattern_sc.hpp"
 
-bool hijacked = false;
+bool hijacked_d3d11 = false;
+bool hijacked_dxgi = false;
 
 typedef HMODULE(WINAPI* TYPE_LoadLibraryA)(LPCSTR);
 TYPE_LoadLibraryA g_loadLibraryA_original = NULL;
 HMODULE WINAPI LoadLibraryA_replacement(_In_ LPCSTR lpFileName)
 {
-	if (hijacked == false) // avoid doing it again as our wrapper module might actually load real d3d11.dll!
+	if (hijacked_d3d11== false) // avoid doing it again as our wrapper module might actually load real d3d11.dll!
 	{
 		if (strstr(lpFileName, "D3D11") != nullptr || strstr(lpFileName, "d3d11"))
 		{
@@ -28,14 +30,41 @@ HMODULE WINAPI LoadLibraryA_replacement(_In_ LPCSTR lpFileName)
 					*lastSlash = '\0';
 					strcat_s(dllPath, "\\d3d11.dll");
 					lpFileName = dllPath;
-					hijacked = true;
+					hijacked_d3d11 = true;
 				}
 			}
 		}
 	}
+
+	if (hijacked_dxgi == false) // avoid doing it again as our wrapper module might actually load real d3d11.dll!
+	{
+		if (strstr(lpFileName, "dxgi") != nullptr || strstr(lpFileName, "DXGI"))
+		{
+			char path[MAX_PATH];
+			if (GetModuleFileNameA(NULL, path, MAX_PATH) != 0)
+			{
+				char dllPath[MAX_PATH];
+				strcpy_s(dllPath, path);
+				char* lastSlash = strrchr(dllPath, '\\');
+				if (lastSlash != NULL)
+				{
+					*lastSlash = '\0';
+					strcat_s(dllPath, "\\dxgi.dll");
+					if (PathFileExistsA(dllPath)) // check if dxgi.dll exists
+					{
+						lpFileName = dllPath;
+						hijacked_dxgi = true;
+					}
+				}
+			}
+		}
+	}
+
 	return g_loadLibraryA_original(lpFileName);
 }
 
+using namespace memory;
+
 bool installHooks()
 {
 	// Initialize MinHook.
@@ -59,34 +88,6 @@ bool installHooks()
 	return true;
 }
 
-const char* mutexDetect = "hijackmutex1337";
-HANDLE hMutex;
-
-bool IsAlreadyInjected()
-{
-	hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, mutexDetect);
-	if (hMutex)
-	{
-		CloseHandle(hMutex);
-		return true;
-	}
-
-	// The mutex does not exist, indicating the DLL is not injected yet
-	// Create the mutex to prevent further injections
-	HANDLE hNewMutex = CreateMutexA(NULL, TRUE, mutexDetect);
-	if (!hNewMutex)
-	{
-		// Failed to create mutex
-		// Handle the error appropriately
-	}
-
-	if (hNewMutex != 0)
-		CloseHandle(hNewMutex);
-
-	return false;
-}
-
-
 BOOL APIENTRY DllMain(HMODULE hModule,
 	DWORD  ul_reason_for_call,
 	LPVOID lpReserved
@@ -96,32 +97,23 @@ BOOL APIENTRY DllMain(HMODULE hModule,
 	switch (ul_reason_for_call)
 	{
 	case DLL_PROCESS_ATTACH:
-
-		if (IsAlreadyInjected())
-		{
-			MessageBoxA(NULL, "Do you want to crash your game? Seems like you like desktop!", "Injection Error", MB_ICONERROR);
-			return FALSE;
-		}
 		installHooks();
 		std::thread([]() {
-			if (hijacked)
+			if (hijacked_d3d11 || hijacked_dxgi)
 			{
 				if (MH_DisableHook(MH_ALL_HOOKS) == MH_OK)
 				{
 					MH_Uninitialize();
 					HMODULE hModule = GetModuleHandle(NULL);
-					ReleaseMutex(hMutex);
 					FreeLibraryAndExitThread(hModule, 0);
 				}
 			}
 			}).detach();
 		break;
 	case DLL_THREAD_ATTACH:
 	case DLL_THREAD_DETACH:
-		ReleaseMutex(hMutex);
 	case DLL_PROCESS_DETACH:
-		ReleaseMutex(hMutex);
 		break;
 	}
 	return TRUE;
-}
+}