cocos2dx lua 加密

  cocos2dx lua已经集成了对lua脚本的加解密，见AppDelegate.cpp.

 LuaStack* stack = engine->getLuaStack();
 stack->setXXTEAKeyAndSign("123", strlen("123"), "cloud", strlen("cloud"));

它是通过XXTEA来加解密的。参数，key,keyLen,signment,signmentLen。它的签名作用可能是用来判断文件是否经过加密的。

       好，我们来对文件加密。打开cocos2d-x\external\xxtea文件夹，调用相关函数xxtea_encrypt进行加密，最后在文件开始位置，写上签名就可以了。我把相关操作封装成一个python文件。可以直接调用。

 import xxteaModule
 import os

 def ReadFile(filePath):
     file_object = open(filePath,'rb')
     all_the_text = file_object.read()
     file_object.close()
     return all_the_text

 def WriteFile(filePath,all_the_text):
     file_object = open(filePath,'wb')
     file_object.write(all_the_text)
     file_object.close()

 def BakFile(filePath,all_the_text):
     file_bak = filePath[:len(filePath)-3] + 'bak'
     WriteFile(file_bak,all_the_text)



 def ListLua(path):
     fileList = []
     for root,dirs,files in os.walk(path):
        for eachfiles in files:
            if eachfiles[-4:] == '.lua' :
                fileList.append(root + '/' + eachfiles)
     return fileList

 def EncodeWithXxteaModule(filePath,key,signment):
     all_the_text = ReadFile(filePath)

     if all_the_text[:len(signment)] == signment :
         return
     #bak lua
     BakFile(filePath,all_the_text)

     encrypt = xxteaModule.encrypt(all_the_text,key)
     signment = signment + encrypt
     WriteFile(filePath,signment)

 def EncodeLua(projectPath,key,signment):
     path = projectPath + '/src'
     fileList = ListLua(path)
     for files in fileList:
         EncodeWithXxteaModule(files,key,signment)

 def FixCpp(projectPath,key,signment):
     filePath = projectPath + '/frameworks/runtime-src/Classes/AppDelegate.cpp'
     all_the_text = ReadFile(filePath)

     #bak cpp
     BakFile(filePath,all_the_text)


     pos = all_the_text.find('stack->setXXTEAKeyAndSign')
     left = all_the_text.find('(',pos)
     right = all_the_text.find(';',pos)

     word = str.format('("%s", strlen("%s"), "%s", strlen("%s"))' % (key,key,signment,signment))

     all_the_text = all_the_text[:left] + word + all_the_text[right:-1]

     WriteFile(filePath,all_the_text)



 projectPath = "D:/cocosIDEWork/aseGame/"
 key = "123"
 signment = "cloud"


 EncodeLua(projectPath,key,signment)
 FixCpp(projectPath,key,signment)
 print "encode ok"

整个工程是用cocosIDE生成的。这个工具会自动加密src下的lua,并在 AppDelegate.cpp中设置相应的密码与签名。xxTeaModule是对cocos2d-x\external\xxtea\xxtea.cpp的一个python封装。

相关工具我已打包上传，见地址：http://download.csdn.net/detail/cloud95/7675821