Hijacked dinput8.dll instead of msimg32.dll

.github/workflows/release.yml

@@ -29,6 +29,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: ./BUILD/Release/msimg32.dll
-          asset_name: msimg32.dll
+          asset_path: ./BUILD/Release/dinput8.dll
+          asset_name: dinput8.dll
           asset_content_type: application/octet-stream

CMakeLists.txt

@@ -26,7 +26,7 @@ set(DEFS
     -DVERSION="${VERSION}"
 )
 
-file(GLOB_RECURSE PROJECT_SOURCE_FILES "src/*.h" "src/*.cpp" "src/proxy/msimg32.def")
+file(GLOB_RECURSE PROJECT_SOURCE_FILES "src/*.h" "src/*.cpp" "src/proxy/dinput8.def")
 
 if(WIN32 AND (MSVC OR CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
     add_definitions(/MT)

README.md

@@ -8,12 +8,12 @@
 - CMake 3.8 или новее
 
 Для сборки нужно выполнить `build.bat` в корне проекта.<br>
-Итоговая DLL будет находиться по пути `BUILD\Release\msimg32.dll`
+Итоговая DLL будет находиться по пути `BUILD\Release\dinput8.dll`
 
 ## Установка
 
-- Скачать последнюю версию мода со страницы [Releases](https://github.com/zziger/supercow-mod/releases/latest). (качать файл `msimg32.dll`)
-- Поместить файл `msimg32.dll` в папку с игрой. Название файла менять нельзя.
+- Скачать последнюю версию мода [тут](https://github.com/zziger/supercow-mod/releases/latest/download/dinput8.dll).
+- Поместить скачанный файл `dinput8.dll` в папку с игрой. Название файла менять нельзя.
 
 ## Функции
 

build.bat

@@ -1,4 +1,4 @@
 cmake -BBUILD . -A Win32 -DVERSION="%1"
 cmake --build BUILD --config Release
-IF EXIST BUILD\Release\msimg32.dll DEL /f BUILD\Release\msimg32.dll
-copy BUILD\Release\supercow-mod.dll BUILD\Release\msimg32.dll
+IF EXIST BUILD\Release\dinput8.dll DEL /f BUILD\Release\dinput8.dll
+copy BUILD\Release\supercow-mod.dll BUILD\Release\dinput8.dll

src/proxy/dinput8.cpp

@@ -0,0 +1,57 @@
+#include <string>
+#include <windows.h>
+
+#include "main.h"
+
+struct dinput8_dll { 
+	HMODULE dll;
+	FARPROC OrignalDirectInput8Create;
+	FARPROC OrignalDllCanUnloadNow;
+	FARPROC OrignalDllGetClassObject;
+	FARPROC OrignalDllRegisterServer;
+	FARPROC OrignalDllUnregisterServer;
+	FARPROC OrignalGetdfDIJoystick;
+} dinput8;
+
+extern "C"
+{
+	__declspec(naked) void __stdcall FakeDirectInput8Create() { _asm { jmp[dinput8.OrignalDirectInput8Create] } }
+	__declspec(naked) void __stdcall FakeDllCanUnloadNow() { _asm { jmp[dinput8.OrignalDllCanUnloadNow] } }
+	__declspec(naked) void __stdcall FakeDllGetClassObject() { _asm { jmp[dinput8.OrignalDllGetClassObject] } }
+	__declspec(naked) void __stdcall FakeDllRegisterServer() { _asm { jmp[dinput8.OrignalDllRegisterServer] } }
+	__declspec(naked) void __stdcall FakeDllUnregisterServer() { _asm { jmp[dinput8.OrignalDllUnregisterServer] } }
+	__declspec(naked) void __stdcall FakeGetdfDIJoystick() { _asm { jmp[dinput8.OrignalGetdfDIJoystick] } }
+}
+
+BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
+	char path[MAX_PATH];
+	switch (ul_reason_for_call)
+	{
+	case DLL_PROCESS_ATTACH:
+	{
+				wchar_t path[MAX_PATH];
+				GetSystemDirectory(path, MAX_PATH);
+				std::wstring pathname = path + std::wstring(L"\\dinput8.dll");
+				dinput8.dll = LoadLibrary(pathname.c_str());
+				if (dinput8.dll == false)
+				{
+					MessageBox(0, L"Cannot load original dinput8.dll library", L"Proxy", MB_ICONERROR);
+					ExitProcess(0);
+				}
+		dinput8.OrignalDirectInput8Create = GetProcAddress(dinput8.dll, "DirectInput8Create");
+		dinput8.OrignalDllCanUnloadNow = GetProcAddress(dinput8.dll, "DllCanUnloadNow");
+		dinput8.OrignalDllGetClassObject = GetProcAddress(dinput8.dll, "DllGetClassObject");
+		dinput8.OrignalDllRegisterServer = GetProcAddress(dinput8.dll, "DllRegisterServer");
+		dinput8.OrignalDllUnregisterServer = GetProcAddress(dinput8.dll, "DllUnregisterServer");
+		dinput8.OrignalGetdfDIJoystick = GetProcAddress(dinput8.dll, "GetdfDIJoystick");
+
+		break;
+	}
+	case DLL_PROCESS_DETACH:
+	{
+		FreeLibrary(dinput8.dll);
+	}
+	break;
+	}
+	return main(hModule, ul_reason_for_call, lpReserved);
+}

src/proxy/dinput8.def

@@ -0,0 +1,8 @@
+LIBRARY dinput8
+EXPORTS
+	DirectInput8Create=FakeDirectInput8Create @1
+	DllCanUnloadNow=FakeDllCanUnloadNow @2
+	DllGetClassObject=FakeDllGetClassObject @3
+	DllRegisterServer=FakeDllRegisterServer @4
+	DllUnregisterServer=FakeDllUnregisterServer @5
+	GetdfDIJoystick=FakeGetdfDIJoystick @6