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[原创] Cocos2dlua手游 Lua解密与资源解密实战
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发表于: 2021-7-24 22:17
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发过理论篇浅谈Cocos2d-x下Lua文件的保护方式 – 翻车鱼 (blog.shi1011.cn)，是时候来实战一番了。
起因
一位不知是港澳台哪地的师傅，加了我的QQ
于是我和他进行了一场漫长的探讨
尽管轮子在手，但是依旧无法反编译出.lua（因为加了一层自定义加密）
结果就是：喜提样本一份
大致结构如下
其中.lua64为标准LuaJit文件
而.lua的文件头有点奇怪
.lua文件头：abcd
再看资源文件.png，发现也是加密的
综上，我们需要实现的目标
这个不多介绍了窝，在理论篇中已经提到了。对于此样本的LuaJit的版本是2.1.0-Beta2，并且没有魔改Opcode
想要解密.lua文件，了解coco2d-x加载Lua的流程必不可少
参考官方Docs，搭建所需环境
由于Android的应用层是从Activity开始的，也就是创建完一个Cocos2dx后src文件夹下的Java文件，其中主要看Activity创建时的操作
这个方法很简单，就只调用了父类Cocos2dxActivity的onCreate方法
在这个方法中主要看Cocos2dxActivity的初始化方法init，Cocos2dxHandler是工具辅助类，不是重点。
首先在init中先看this.mGLSurfaceView = this.onCreateView();this.mGLSurfaceView是一个Cocos2dxGLSurfaceView类
进入到Cocos2dxGLSurfaceView这个类，可以看到时继承于GLSurfaceView（可以把GLSurfaceView看成一个视图，里面有个方法设置了这个视图的渲染器，然后通过这个渲染器来进行画面的渲染）
在Android中，GLSurfaceView是一个支持OpenGL的渲染视图，通过继承SurfaceView中的surface来渲染OpenGL
并提供了以下特性（来源于网上）
重点是自定义的渲染器，也就是Cocos2dx引擎封装的渲染器
进入Cocos2dxRenderer类，看到他是继承GLSurfaceView.Renderer接口，这个接口定义了三个方法：
onSurfaceCreated
nativeInit是一个Native函数
具体实现在frameworks\cocos2d-x\cocos\platform\android\javaactivity-android.cpp中
重点是cocos2d::Application::getInstance()->run()
applicationDidFinishLaunching，没错这就是游戏逻辑的入口了
LuaEngine::getInstance();这段代码实例化了LuaEngine
下面分析LuaEngine初始化过程
接下来是_defaultEngine->init();
继续进入
下面是stack->init()
重点在cocos2dx_lua_loader方法(这个方法在frameworks\cocos2d-x\cocos\scripting\lua-bindings\manual\Cocos2dxLuaLoader.cpp)
通过此处的代码，可以了解到cocos2d-x是如何搜索指定的lua文件
同时也会明白require为何可以使用 "." 来设定文件路径了，比如：
再来看下stack->luaLoadBuffer的实现：
至此，Lua文件的加载流程结束
下面是Lua文件主要加载流程图
了解了Coco2d-x Lua文件基本的加载流程，可以帮助我们很快的定位关键方法
由于所有的Lua文件加载必定经过cocos2d::LuaStack::luaLoadBuffer，所以可以直接定位，进行回溯
定位至cocos2dx_lua_loader
在luaLoadBuffer前调用了decodeLuaData，怀疑这就是解密Lua的关键方法
下面是伪代码
此方法首先获取文件数据，而后判断文件头，文件头正是abcd
可以肯定这就是解密.lua的算法
如果不确定，我们可以使用Frida进行Hook验证猜想
我这里就不Hook了
要实现算法的还原，我们就要依据伪代码或是汇编代码翻译成可用代码，可以发现IDA所反汇编的伪代码中包含了一些特定的宏，例如：LOBYTE
要了解这些宏的用途，我们可以参考ida_root/plugins/def.h
我这里使用了Python
解密后，发现还是LuaJit，那么直接类同.lua64反汇编即可
回到Lua文件加载流程分析时提到的LuaStack::init()方法中，调用了register_all_cocos2dx
在大量注册函数中寻找到关键方法lua_register_cocos2dx_Image
lua_cocos2dx_Image_initWithImageFile加载了我们的图片文件
下面看cobj->initWithImageFile
下面是图片数据格式解码方法initWithImageData
图片资源的加载到这里就结束了
根据调用流程，我们可以直接定位方法cocos2d::Image::initWithImageData
向上可以追溯到cocos2d::Image::initWithImageFile
看到了可疑函数cocos2d::Image::decodePngData
明显是一个算法函数，看方法cocos2d::decodePng
这里也可以尝试Frida Hook验证猜想
同样的，我就不Hook了
解密结果
写不出总结啦，大概最大的感想就是：对照源码逆向好爽！！！
.├── assets│ ├── res│ │ ├── ani│ │ │ └── logo│ │ │ └── logo.png│ ├── src│ │ ├── main.lua│ │ └── main.lua64├── lib│ ├── arm64-v8a│ │ ├── libBugly.so│ │ └── libcocos2dlua.so│ └── armeabi-v7a│ ├── libBugly.so│ └── libcocos2dlua.so└── stamp-cert-sha256.├── assets│ ├── res│ │ ├── ani│ │ │ └── logo│ │ │ └── logo.png│ ├── src│ │ ├── main.lua│ │ └── main.lua64├── lib│ ├── arm64-v8a│ │ ├── libBugly.so│ │ └── libcocos2dlua.so│ └── armeabi-v7a│ ├── libBugly.so│ └── libcocos2dlua.so└── stamp-cert-sha256package org.cocos2dx.lua;import android.os.Bundle;import org.cocos2dx.lib.Cocos2dxActivity;public class AppActivity extends Cocos2dxActivity{ @Override protected void onCreate(Bundle savedInstanceState) { super.setEnableVirtualButton(false); super.onCreate(savedInstanceState); // Workaround in https://stackoverflow.com/questions/16283079/re-launch-of-activity-on-home-button-but-only-the-first-time/16447508 if (!isTaskRoot()) { // Android launched another instance of the root activity into an existing task // so just quietly finish and go away, dropping the user back into the activity // at the top of the stack (ie: the last state of this task) // Don't need to finish it again since it's finished in super.onCreate . return; } // DO OTHER INITIALIZATION BELOW }}package org.cocos2dx.lua;import android.os.Bundle;import org.cocos2dx.lib.Cocos2dxActivity;public class AppActivity extends Cocos2dxActivity{ @Override protected void onCreate(Bundle savedInstanceState) { super.setEnableVirtualButton(false); super.onCreate(savedInstanceState); // Workaround in https://stackoverflow.com/questions/16283079/re-launch-of-activity-on-home-button-but-only-the-first-time/16447508 if (!isTaskRoot()) { // Android launched another instance of the root activity into an existing task // so just quietly finish and go away, dropping the user back into the activity // at the top of the stack (ie: the last state of this task) // Don't need to finish it again since it's finished in super.onCreate . return; } // DO OTHER INITIALIZATION BELOW }}@Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Workaround in https://stackoverflow.com/questions/16283079/re-launch-of-activity-on-home-button-but-only-the-first-time/16447508 if (!isTaskRoot()) { // Android launched another instance of the root activity into an existing task // so just quietly finish and go away, dropping the user back into the activity // at the top of the stack (ie: the last state of this task) finish(); Log.w(TAG, "[Workaround] Ignore the activity started from icon!"); return; } this.hideVirtualButton(); onLoadNativeLibraries(); sContext = this; this.mHandler = new Cocos2dxHandler(this); Cocos2dxHelper.init(this); this.mGLContextAttrs = getGLContextAttrs(); this.init(); if (mVideoHelper == null) { mVideoHelper = new Cocos2dxVideoHelper(this, mFrameLayout); } if(mWebViewHelper == null){ mWebViewHelper = new Cocos2dxWebViewHelper(mFrameLayout); } if(mEditBoxHelper == null){ mEditBoxHelper = new Cocos2dxEditBoxHelper(mFrameLayout); } Window window = this.getWindow(); window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN); // Audio configuration this.setVolumeControlStream(AudioManager.STREAM_MUSIC); }@Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Workaround in https://stackoverflow.com/questions/16283079/re-launch-of-activity-on-home-button-but-only-the-first-time/16447508 if (!isTaskRoot()) { // Android launched another instance of the root activity into an existing task // so just quietly finish and go away, dropping the user back into the activity // at the top of the stack (ie: the last state of this task) finish(); Log.w(TAG, "[Workaround] Ignore the activity started from icon!"); return; } this.hideVirtualButton(); onLoadNativeLibraries(); sContext = this; this.mHandler = new Cocos2dxHandler(this); Cocos2dxHelper.init(this); this.mGLContextAttrs = getGLContextAttrs(); this.init(); if (mVideoHelper == null) { mVideoHelper = new Cocos2dxVideoHelper(this, mFrameLayout); } if(mWebViewHelper == null){ mWebViewHelper = new Cocos2dxWebViewHelper(mFrameLayout); } if(mEditBoxHelper == null){ mEditBoxHelper = new Cocos2dxEditBoxHelper(mFrameLayout); } Window window = this.getWindow(); window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN); // Audio configuration this.setVolumeControlStream(AudioManager.STREAM_MUSIC); }public Cocos2dxGLSurfaceView onCreateView() { Cocos2dxGLSurfaceView glSurfaceView = new Cocos2dxGLSurfaceView(this); //this line is need on some device if we specify an alpha bits // FIXME: is it needed? And it will cause afterimage. // if(this.mGLContextAttrs[3] > 0) glSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT); // use custom EGLConfigureChooser Cocos2dxEGLConfigChooser chooser = new Cocos2dxEGLConfigChooser(this.mGLContextAttrs); glSurfaceView.setEGLConfigChooser(chooser); return glSurfaceView; }// ......public void init() { // FrameLayout 初始化窗口布局 ViewGroup.LayoutParams framelayout_params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); mFrameLayout = new ResizeLayout(this); mFrameLayout.setLayoutParams(framelayout_params); // Cocos2dxEditText layout 初始化Cocos2dx的文本编辑布局 ViewGroup.LayoutParams edittext_layout_params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); Cocos2dxEditBox edittext = new Cocos2dxEditBox(this); edittext.setLayoutParams(edittext_layout_params); mFrameLayout.addView(edittext); // Cocos2dxGLSurfaceView 初始化Cocos2dx视图 this.mGLSurfaceView = this.onCreateView(); // ...add to FrameLayout 将Cocos2dxGLSurfaceView加入到当前的窗口布局中 mFrameLayout.addView(this.mGLSurfaceView); // Switch to supported OpenGL (ARGB888) mode on emulator // this line dows not needed on new emulators and also it breaks stencil buffer //if (isAndroidEmulator()) // 在模拟器中切换支持OpenGL模式的渲染(ARGB888) // this.mGLSurfaceView.setEGLConfigChooser(8, 8, 8, 8, 16, 0); // 设置Cocos2dx的渲染器 this.mGLSurfaceView.setCocos2dxRenderer(new Cocos2dxRenderer()); //设置Cocos2dx的文本编辑 this.mGLSurfaceView.setCocos2dxEditText(edittext); // Set framelayout as the content view // 把显示布局（即Cocos2dx的视图）绑定到Activity上，建立显示窗口 setContentView(mFrameLayout); }public Cocos2dxGLSurfaceView onCreateView() { Cocos2dxGLSurfaceView glSurfaceView = new Cocos2dxGLSurfaceView(this); //this line is need on some device if we specify an alpha bits // FIXME: is it needed? And it will cause afterimage. // if(this.mGLContextAttrs[3] > 0) glSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT); // use custom EGLConfigureChooser Cocos2dxEGLConfigChooser chooser = new Cocos2dxEGLConfigChooser(this.mGLContextAttrs); glSurfaceView.setEGLConfigChooser(chooser); return glSurfaceView; }// ......public void init() { // FrameLayout 初始化窗口布局 ViewGroup.LayoutParams framelayout_params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); mFrameLayout = new ResizeLayout(this); mFrameLayout.setLayoutParams(framelayout_params); // Cocos2dxEditText layout 初始化Cocos2dx的文本编辑布局 ViewGroup.LayoutParams edittext_layout_params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); Cocos2dxEditBox edittext = new Cocos2dxEditBox(this); edittext.setLayoutParams(edittext_layout_params); mFrameLayout.addView(edittext); // Cocos2dxGLSurfaceView 初始化Cocos2dx视图 this.mGLSurfaceView = this.onCreateView(); // ...add to FrameLayout 将Cocos2dxGLSurfaceView加入到当前的窗口布局中 mFrameLayout.addView(this.mGLSurfaceView); // Switch to supported OpenGL (ARGB888) mode on emulator // this line dows not needed on new emulators and also it breaks stencil buffer //if (isAndroidEmulator()) // 在模拟器中切换支持OpenGL模式的渲染(ARGB888) // this.mGLSurfaceView.setEGLConfigChooser(8, 8, 8, 8, 16, 0); // 设置Cocos2dx的渲染器 this.mGLSurfaceView.setCocos2dxRenderer(new Cocos2dxRenderer()); //设置Cocos2dx的文本编辑 this.mGLSurfaceView.setCocos2dxEditText(edittext); // Set framelayout as the content view // 把显示布局（即Cocos2dx的视图）绑定到Activity上，建立显示窗口 setContentView(mFrameLayout); }@Override public void onSurfaceCreated(final GL10 GL10, final EGLConfig EGLConfig) { Cocos2dxRenderer.nativeInit(this.mScreenWidth, this.mScreenHeight); this.mLastTickInNanoSeconds = System.nanoTime(); mNativeInitCompleted = true; }@Override public void onSurfaceCreated(final GL10 GL10, final EGLConfig EGLConfig) { Cocos2dxRenderer.nativeInit(this.mScreenWidth, this.mScreenHeight); this.mLastTickInNanoSeconds = System.nanoTime(); mNativeInitCompleted = true; }private static native void nativeInit(final int width, final int height);private static native void nativeInit(final int width, final int height);JNIEXPORT void Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeInit(JNIEnv* env, jobject thiz, jint w, jint h){ auto director = cocos2d::Director::getInstance(); auto glview = director->getOpenGLView(); if (!glview) { glview = cocos2d::GLViewImpl::create("Android app"); glview->setFrameSize(w, h); director->setOpenGLView(glview); cocos2d::Application::getInstance()->run(); } else { cocos2d::Director::getInstance()->resetMatrixStack(); cocos2d::EventCustom recreatedEvent(EVENT_RENDERER_RECREATED); director->getEventDispatcher()->dispatchEvent(&recreatedEvent); director->setGLDefaultValues(); cocos2d::VolatileTextureMgr::reloadAllTextures(); } cocos2d::network::_preloadJavaDownloaderClass();}JNIEXPORT void Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeInit(JNIEnv* env, jobject thiz, jint w, jint h){ auto director = cocos2d::Director::getInstance(); auto glview = director->getOpenGLView(); if (!glview) { glview = cocos2d::GLViewImpl::create("Android app"); glview->setFrameSize(w, h); director->setOpenGLView(glview); cocos2d::Application::getInstance()->run(); } else { cocos2d::Director::getInstance()->resetMatrixStack(); cocos2d::EventCustom recreatedEvent(EVENT_RENDERER_RECREATED); director->getEventDispatcher()->dispatchEvent(&recreatedEvent); director->setGLDefaultValues(); cocos2d::VolatileTextureMgr::reloadAllTextures(); } cocos2d::network::_preloadJavaDownloaderClass();}int Application::run(){ // Initialize instance and cocos2d. if (! applicationDidFinishLaunching()) { return 0; } return -1;}int Application::run(){ // Initialize instance and cocos2d. if (! applicationDidFinishLaunching()) { return 0; } return -1;}bool AppDelegate::applicationDidFinishLaunching(){ // set default FPS Director::getInstance()->setAnimationInterval(1.0 / 60.0f); // register lua module // 初始化 LuaEngine, 在 getInstance 中会初始化 LuaStack, LuaStack 初始化 Lua 环境相关 auto engine = LuaEngine::getInstance(); // 将 LuaEngine 添加到脚本引擎管理器 ScriptEngineManager 中 ScriptEngineManager::getInstance()->setScriptEngine(engine); // 获取 Lua 环境 lua_State* L = engine->getLuaStack()->getLuaState(); // 注册额外的 C++ API 相关，比如 cocosstudio, spine, audio 相关 lua_module_register(L); // 设置 cocos 自带的加密相关 register_all_packages(); // 在 LuaStack::executeScriptFile 执行脚本文件时，会通过 LuaStack::luaLoadBuffer 对文件进行解密 LuaStack* stack = engine->getLuaStack(); stack->setXXTEAKeyAndSign("2dxLua", strlen("2dxLua"), "XXTEA", strlen("XXTEA")); //register custom function //LuaStack* stack = engine->getLuaStack(); //register_custom_function(stack->getLuaState());#if CC_64BITS FileUtils::getInstance()->addSearchPath("src/64bit");#endif FileUtils::getInstance()->addSearchPath("src"); FileUtils::getInstance()->addSearchPath("res"); if (engine->executeScriptFile("main.lua")) { return false; } return true;}bool AppDelegate::applicationDidFinishLaunching(){ // set default FPS Director::getInstance()->setAnimationInterval(1.0 / 60.0f); // register lua module // 初始化 LuaEngine, 在 getInstance 中会初始化 LuaStack, LuaStack 初始化 Lua 环境相关 auto engine = LuaEngine::getInstance(); // 将 LuaEngine 添加到脚本引擎管理器 ScriptEngineManager 中 ScriptEngineManager::getInstance()->setScriptEngine(engine); // 获取 Lua 环境 lua_State* L = engine->getLuaStack()->getLuaState(); // 注册额外的 C++ API 相关，比如 cocosstudio, spine, audio 相关 lua_module_register(L); // 设置 cocos 自带的加密相关 register_all_packages(); // 在 LuaStack::executeScriptFile 执行脚本文件时，会通过 LuaStack::luaLoadBuffer 对文件进行解密 LuaStack* stack = engine->getLuaStack(); stack->setXXTEAKeyAndSign("2dxLua", strlen("2dxLua"), "XXTEA", strlen("XXTEA")); //register custom function //LuaStack* stack = engine->getLuaStack(); //register_custom_function(stack->getLuaState());#if CC_64BITS FileUtils::getInstance()->addSearchPath("src/64bit");#endif FileUtils::getInstance()->addSearchPath("src"); FileUtils::getInstance()->addSearchPath("res"); if (engine->executeScriptFile("main.lua")) { return false; } return true;}LuaEngine* LuaEngine::getInstance(void){ if (!_defaultEngine) { _defaultEngine = new (std::nothrow) LuaEngine(); _defaultEngine->init(); } return _defaultEngine;}LuaEngine* LuaEngine::getInstance(void){ if (!_defaultEngine) { _defaultEngine = new (std::nothrow) LuaEngine(); _defaultEngine->init(); } return _defaultEngine;}bool LuaEngine::init(void){ _stack = LuaStack::create(); _stack->retain(); return true;}bool LuaEngine::init(void){ _stack = LuaStack::create(); _stack->retain(); return true;}LuaStack *LuaStack::create(){ LuaStack *stack = new (std::nothrow) LuaStack(); stack->init(); stack->autorelease(); return stack;}LuaStack *LuaStack::create(){ LuaStack *stack = new (std::nothrow) LuaStack(); stack->init(); stack->autorelease(); return stack;}bool LuaStack::init(){ // 初始化Lua环境并打开标准库 _state = lua_open(); luaL_openlibs(_state); toluafix_open(_state); // Register our version of the global "print" function // 注册全局函数print到lua中，它会覆盖lua库中的print方法 const luaL_Reg global_functions [] = { {"print", lua_print}, {"release_print",lua_release_print}, {nullptr, nullptr} }; // 注册全局变量 luaL_register(_state, "_G", global_functions); // 注册cocos2d-x引擎的API到lua环境中 g_luaType.clear(); register_all_cocos2dx(_state); register_all_cocos2dx_backend(_state); register_all_cocos2dx_manual(_state); register_all_cocos2dx_module_manual(_state); register_all_cocos2dx_math_manual(_state); register_all_cocos2dx_shaders_manual(_state); register_all_cocos2dx_bytearray_manual(_state); tolua_luanode_open(_state); register_luanode_manual(_state);#if CC_USE_PHYSICS // 导入使用的physics相关API register_all_cocos2dx_physics(_state); register_all_cocos2dx_physics_manual(_state);#endif#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC) // 导入ios下调用object-c相关API LuaObjcBridge::luaopen_luaoc(_state);#endif#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) // 导入android下调用java相关API LuaJavaBridge::luaopen_luaj(_state);#endif register_all_cocos2dx_deprecated(_state); register_all_cocos2dx_manual_deprecated(_state); tolua_script_handler_mgr_open(_state); // add cocos2dx loader // 添加Lua的加载器,该方法将cocos2dx_lua_loader方法添加到Lua全局变量package下的loaders成员中 // 当requires加载脚本时，Lua会使用package下的loaders中的加载器，即cocos2dx_lua_loader来加载 // 设定cocos2dx_lua_loader，可以使得我们自定义设置搜索路径相关，且拓展实现对脚本的加密解密相关 addLuaLoader(cocos2dx_lua_loader); return true;}bool LuaStack::init(){ // 初始化Lua环境并打开标准库 _state = lua_open(); luaL_openlibs(_state); toluafix_open(_state); // Register our version of the global "print" function // 注册全局函数print到lua中，它会覆盖lua库中的print方法 const luaL_Reg global_functions [] = { {"print", lua_print}, {"release_print",lua_release_print}, {nullptr, nullptr} }; // 注册全局变量 luaL_register(_state, "_G", global_functions); // 注册cocos2d-x引擎的API到lua环境中 g_luaType.clear(); register_all_cocos2dx(_state); register_all_cocos2dx_backend(_state); register_all_cocos2dx_manual(_state); register_all_cocos2dx_module_manual(_state); register_all_cocos2dx_math_manual(_state); register_all_cocos2dx_shaders_manual(_state); register_all_cocos2dx_bytearray_manual(_state); tolua_luanode_open(_state); register_luanode_manual(_state);#if CC_USE_PHYSICS // 导入使用的physics相关API register_all_cocos2dx_physics(_state); register_all_cocos2dx_physics_manual(_state);#endif#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC) // 导入ios下调用object-c相关API LuaObjcBridge::luaopen_luaoc(_state);#endif#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) // 导入android下调用java相关API LuaJavaBridge::luaopen_luaj(_state);#endif register_all_cocos2dx_deprecated(_state); register_all_cocos2dx_manual_deprecated(_state); tolua_script_handler_mgr_open(_state); // add cocos2dx loader // 添加Lua的加载器,该方法将cocos2dx_lua_loader方法添加到Lua全局变量package下的loaders成员中 // 当requires加载脚本时，Lua会使用package下的loaders中的加载器，即cocos2dx_lua_loader来加载 // 设定cocos2dx_lua_loader，可以使得我们自定义设置搜索路径相关，且拓展实现对脚本的加密解密相关 addLuaLoader(cocos2dx_lua_loader); return true;}int cocos2dx_lua_loader(lua_State *L) { // 后缀为luac和lua static const std::string BYTECODE_FILE_EXT = ".luac"; static const std::string NOT_BYTECODE_FILE_EXT = ".lua"; // require传入的要加载的文件名，例如：require("a.b") 查找文件为：a/b.lua std::string filename(luaL_checkstring(L, 1)); size_t pos = filename.rfind(BYTECODE_FILE_EXT); // 去掉后缀名".luac"或“.lua” if (pos != std::string::npos && pos == filename.length() - BYTECODE_FILE_EXT.length()) filename = filename.substr(0, pos); else { pos = filename.rfind(NOT_BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == filename.length() - NOT_BYTECODE_FILE_EXT.length()) filename = filename.substr(0, pos); } // 将 "." 替换为 "/" pos = filename.find_first_of('.'); while (pos != std::string::npos) { filename.replace(pos, 1, "/"); pos = filename.find_first_of('.'); } // search file in package.path Data chunk; std::string chunkName; FileUtils* utils = FileUtils::getInstance(); // 获取 package.path 的变量 lua_getglobal(L, "package"); lua_getfield(L, -1, "path"); // 通过 package.path 获取搜索路径相关，该路径为模版路径，格式类似于： // ?; ?.lua; c:\Users\?; /usr/local/lua/lua/?/?.lua 以“;”作为分割符 std::string searchpath(lua_tostring(L, -1)); lua_pop(L, 1); size_t begin = 0; size_t next = searchpath.find_first_of(';', 0); // 遍历 package.path 中的所有路径，查找文件是否存在，若文件存在则通过 getDataFromFile 读取文件数据 do { if (next == std::string::npos) next = searchpath.length(); std::string prefix = searchpath.substr(begin, next-begin); if (prefix[0] == '.' && prefix[1] == '/') prefix = prefix.substr(2); pos = prefix.rfind(BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == prefix.length() - BYTECODE_FILE_EXT.length()) { prefix = prefix.substr(0, pos); } else { pos = prefix.rfind(NOT_BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == prefix.length() - NOT_BYTECODE_FILE_EXT.length()) prefix = prefix.substr(0, pos); } pos = prefix.find_first_of('?', 0); while (pos != std::string::npos) { prefix.replace(pos, 1, filename); pos = prefix.find_first_of('?', pos + filename.length() + 1); } chunkName = prefix + BYTECODE_FILE_EXT; if (utils->isFileExist(chunkName)) // && !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } else { chunkName = prefix + NOT_BYTECODE_FILE_EXT; if (utils->isFileExist(chunkName) ) //&& !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } else { chunkName = prefix; if (utils->isFileExist(chunkName)) // && !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } } } // 指定搜素路径下不存在该文件, 下一个 begin = next + 1; next = searchpath.find_first_of(';', begin); } while (begin < searchpath.length()); // 判断文件内容是否获取成功 if (chunk.getSize() > 0) { // 加载文件 LuaStack* stack = LuaEngine::getInstance()->getLuaStack(); stack->luaLoadBuffer(L, reinterpret_cast<const char*>(chunk.getBytes()), static_cast<int>(chunk.getSize()), chunkName.c_str()); } else { CCLOG("can not get file data of %s", chunkName.c_str()); return 0; } return 1; }int cocos2dx_lua_loader(lua_State *L) { // 后缀为luac和lua static const std::string BYTECODE_FILE_EXT = ".luac"; static const std::string NOT_BYTECODE_FILE_EXT = ".lua"; // require传入的要加载的文件名，例如：require("a.b") 查找文件为：a/b.lua std::string filename(luaL_checkstring(L, 1)); size_t pos = filename.rfind(BYTECODE_FILE_EXT); // 去掉后缀名".luac"或“.lua” if (pos != std::string::npos && pos == filename.length() - BYTECODE_FILE_EXT.length()) filename = filename.substr(0, pos); else { pos = filename.rfind(NOT_BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == filename.length() - NOT_BYTECODE_FILE_EXT.length()) filename = filename.substr(0, pos); } // 将 "." 替换为 "/" pos = filename.find_first_of('.'); while (pos != std::string::npos) { filename.replace(pos, 1, "/"); pos = filename.find_first_of('.'); } // search file in package.path Data chunk; std::string chunkName; FileUtils* utils = FileUtils::getInstance(); // 获取 package.path 的变量 lua_getglobal(L, "package"); lua_getfield(L, -1, "path"); // 通过 package.path 获取搜索路径相关，该路径为模版路径，格式类似于： // ?; ?.lua; c:\Users\?; /usr/local/lua/lua/?/?.lua 以“;”作为分割符 std::string searchpath(lua_tostring(L, -1)); lua_pop(L, 1); size_t begin = 0; size_t next = searchpath.find_first_of(';', 0); // 遍历 package.path 中的所有路径，查找文件是否存在，若文件存在则通过 getDataFromFile 读取文件数据 do { if (next == std::string::npos) next = searchpath.length(); std::string prefix = searchpath.substr(begin, next-begin); if (prefix[0] == '.' && prefix[1] == '/') prefix = prefix.substr(2); pos = prefix.rfind(BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == prefix.length() - BYTECODE_FILE_EXT.length()) { prefix = prefix.substr(0, pos); } else { pos = prefix.rfind(NOT_BYTECODE_FILE_EXT); if (pos != std::string::npos && pos == prefix.length() - NOT_BYTECODE_FILE_EXT.length()) prefix = prefix.substr(0, pos); } pos = prefix.find_first_of('?', 0); while (pos != std::string::npos) { prefix.replace(pos, 1, filename); pos = prefix.find_first_of('?', pos + filename.length() + 1); } chunkName = prefix + BYTECODE_FILE_EXT; if (utils->isFileExist(chunkName)) // && !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } else { chunkName = prefix + NOT_BYTECODE_FILE_EXT; if (utils->isFileExist(chunkName) ) //&& !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } else { chunkName = prefix; if (utils->isFileExist(chunkName)) // && !utils->isDirectoryExist(chunkName)) { chunk = utils->getDataFromFile(chunkName); break; } } } // 指定搜素路径下不存在该文件, 下一个 begin = next + 1; next = searchpath.find_first_of(';', begin); } while (begin < searchpath.length()); // 判断文件内容是否获取成功 if (chunk.getSize() > 0) { // 加载文件 LuaStack* stack = LuaEngine::getInstance()->getLuaStack(); stack->luaLoadBuffer(L, reinterpret_cast<const char*>(chunk.getBytes()), static_cast<int>(chunk.getSize()), chunkName.c_str()); } else { CCLOG("can not get file data of %s", chunkName.c_str()); return 0; } return 1; }require "cocos.cocos2d.Cocos2d"require "cocos.cocos2d.Cocos2dConstants"require "cocos.cocos2d.functions"require "cocos.cocos2d.Cocos2d"require "cocos.cocos2d.Cocos2dConstants"require "cocos.cocos2d.functions"int LuaStack::luaLoadBuffer(lua_State *L, const char *chunk, int chunkSize, const char *chunkName){ int r = 0; // 判断是否加密，若lua脚本加密，则解密后在加载脚本文件 // luaL_loadbuffer 用于加载并编译Lua代码，并将其压入栈中 if (_xxteaEnabled && strncmp(chunk, _xxteaSign, _xxteaSignLen) == 0) { // decrypt XXTEA xxtea_long len = 0; unsigned char* result = xxtea_decrypt((unsigned char*)chunk + _xxteaSignLen, (xxtea_long)chunkSize - _xxteaSignLen, (unsigned char*)_xxteaKey, (xxtea_long)_xxteaKeyLen, &len); unsigned char* content = result; xxtea_long contentSize = len; skipBOM((const char*&)content, (int&)contentSize); r = luaL_loadbuffer(L, (char*)content, contentSize, chunkName); free(result); } else { skipBOM(chunk, chunkSize); r = luaL_loadbuffer(L, chunk, chunkSize, chunkName); }// 判定内容是否存在错误#if defined(COCOS2D_DEBUG) && COCOS2D_DEBUG > 0 if (r) { switch (r) { case LUA_ERRSYNTAX: // 语法错误 CCLOG("[LUA ERROR] load \"%s\", error: syntax error during pre-compilation.", chunkName); break; case LUA_ERRMEM: // 内存分配错误 CCLOG("[LUA ERROR] load \"%s\", error: memory allocation error.", chunkName); break; case LUA_ERRFILE: // 文件错误 CCLOG("[LUA ERROR] load \"%s\", error: cannot open/read file.", chunkName); break; default: // 未知错误 CCLOG("[LUA ERROR] load \"%s\", error: unknown.", chunkName); } }#endif return r;}int LuaStack::luaLoadBuffer(lua_State *L, const char *chunk, int chunkSize, const char *chunkName){ int r = 0; // 判断是否加密，若lua脚本加密，则解密后在加载脚本文件 // luaL_loadbuffer 用于加载并编译Lua代码，并将其压入栈中 if (_xxteaEnabled && strncmp(chunk, _xxteaSign, _xxteaSignLen) == 0) { // decrypt XXTEA xxtea_long len = 0; unsigned char* result = xxtea_decrypt((unsigned char*)chunk + _xxteaSignLen, (xxtea_long)chunkSize - _xxteaSignLen, (unsigned char*)_xxteaKey, (xxtea_long)_xxteaKeyLen, &len); unsigned char* content = result; xxtea_long contentSize = len; skipBOM((const char*&)content, (int&)contentSize); r = luaL_loadbuffer(L, (char*)content, contentSize, chunkName); free(result); } else { skipBOM(chunk, chunkSize); r = luaL_loadbuffer(L, chunk, chunkSize, chunkName); }// 判定内容是否存在错误#if defined(COCOS2D_DEBUG) && COCOS2D_DEBUG > 0 if (r) { switch (r) { case LUA_ERRSYNTAX: // 语法错误 CCLOG("[LUA ERROR] load \"%s\", error: syntax error during pre-compilation.", chunkName); break; case LUA_ERRMEM: // 内存分配错误 CCLOG("[LUA ERROR] load \"%s\", error: memory allocation error.", chunkName); break; case LUA_ERRFILE: // 文件错误 CCLOG("[LUA ERROR] load \"%s\", error: cannot open/read file.", chunkName); break; default: // 未知错误 CCLOG("[LUA ERROR] load \"%s\", error: unknown.", chunkName); } }#endif return r;}_BYTE *__fastcall decodeLuaData(cocos2d::Data *a1, int *size){ _BYTE *v3; // r0 _BYTE *v4; // r5 int v6; // r0 int v7; // r2 int v8; // r3 bool v9; // cc unsigned int v10; // r1 _BYTE *v11; // r12 _BYTE *v12; // r0 char v13; // t1 _BYTE *v14; // r0 char v15[4]; // [sp+0h] [bp-18h] v3 = (_BYTE *)cocos2d::Data::getBytes(a1); v4 = v3; if ( *size > 8 && *v3 == 'a' && v3[1] == 'b' && v3[2] == 'c' && v3[3] == 'd' ) { v6 = _hexToDecimal(v3 + 4, 4); v7 = *size; v8 = 0; v9 = *size <= 8; v15[3] = v6; v15[2] = (unsigned __int16)(v6 - 2048) >> 8; v10 = (unsigned int)(v6 - 2048) >> 24; v15[1] = (unsigned int)(v6 - 2048) >> 16; v15[0] = (unsigned int)(v6 - 2048) >> 24; if ( !v9 ) { v11 = v4 - 1; v12 = v4 + 7; while ( 1 ) { v13 = *++v12; ++v8; *++v11 = v13 ^ v10; v7 = *size; if ( *size <= v8 + 8 ) break; LOBYTE(v10) = v15[v8 & 3]; } } v14 = &v4[v7 - 8]; *v14 = 0; v14[1] = 0; v14[2] = 0; v14[3] = 0; v14[4] = 0; v14[5] = 0; v14[6] = 0; v14[7] = 0; *size -= 8; } return v4;}_BYTE *__fastcall decodeLuaData(cocos2d::Data *a1, int *size){ _BYTE *v3; // r0 _BYTE *v4; // r5 int v6; // r0 int v7; // r2 int v8; // r3 bool v9; // cc unsigned int v10; // r1 _BYTE *v11; // r12 _BYTE *v12; // r0 char v13; // t1 _BYTE *v14; // r0 char v15[4]; // [sp+0h] [bp-18h] v3 = (_BYTE *)cocos2d::Data::getBytes(a1); v4 = v3; if ( *size > 8 && *v3 == 'a' && v3[1] == 'b' && v3[2] == 'c' && v3[3] == 'd' ) { v6 = _hexToDecimal(v3 + 4, 4); v7 = *size; v8 = 0; v9 = *size <= 8; v15[3] = v6; v15[2] = (unsigned __int16)(v6 - 2048) >> 8; v10 = (unsigned int)(v6 - 2048) >> 24; v15[1] = (unsigned int)(v6 - 2048) >> 16; v15[0] = (unsigned int)(v6 - 2048) >> 24; if ( !v9 ) { v11 = v4 - 1; v12 = v4 + 7; while ( 1 ) { v13 = *++v12; ++v8; *++v11 = v13 ^ v10; v7 = *size; if ( *size <= v8 + 8 ) break; LOBYTE(v10) = v15[v8 & 3]; } } v14 = &v4[v7 - 8]; *v14 = 0; v14[1] = 0; v14[2] = 0; v14[3] = 0; v14[4] = 0; v14[5] = 0; v14[6] = 0; v14[7] = 0; *size -= 8; } return v4;}import structfrom loguru import loggerdef _hexToDecimal(data, offset): if offset <= 0: return 0 return struct.unpack(">I", data[:offset])[0]def LOBYTE(d): return d & 0xffdef decodeLuaData(data, size): v4 = bytearray(data) v15 = [0] * 4 if size > 8 and data[0] == ord('a') and data[1] == ord('b') and data[2] == ord('c') and data[3] == ord('d'): logger.info("find special exts") v6 = _hexToDecimal(data[4:], 4) v15[3] = v6 v15[2] = (v6 - 2048) >> 8 v10 = (v6 - 2048) >> 24 v15[1] = (v6 - 2048) >> 16 v15[0] = (v6 - 2048) >> 24 if size > 8: i = 0 while 1: v13 = v4[8 + i] v4[i] = v13 ^ v10 i += 1 if size <= i + 8: break v10 = LOBYTE(v15[i & 3]) size -= 8 return v4[:-8]import structfrom loguru import loggerdef _hexToDecimal(data, offset): if offset <= 0: return 0 return struct.unpack(">I", data[:offset])[0]def LOBYTE(d): return d & 0xffdef decodeLuaData(data, size): v4 = bytearray(data) v15 = [0] * 4 if size > 8 and data[0] == ord('a') and data[1] == ord('b') and data[2] == ord('c') and data[3] == ord('d'): logger.info("find special exts") v6 = _hexToDecimal(data[4:], 4)
最后于 2021-7-24 22:21
被sunfishi编辑
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