cocos rc4加解密

static Data getData(const std::string& filename, bool forString){    if (filename.empty())    {        return Data::Null;    }    Data ret;    unsigned char* buffer = nullptr;    size_t size = 0;    size_t readsize;    const char* mode = nullptr;    if (forString)        mode = "rt";    else        mode = "rb";    auto fileutils = FileUtils::getInstance();    do    {        // Read the file from hardware        std::string fullPath = fileutils->fullPathForFilename(filename);        FILE *fp = fopen(fileutils->getSuitableFOpen(fullPath).c_str(), mode);        CC_BREAK_IF(!fp);        fseek(fp,0,SEEK_END);        size = ftell(fp);        fseek(fp,0,SEEK_SET);        if (forString)        {            buffer = (unsigned char*)malloc(sizeof(unsigned char) * (size + 1));            buffer[size] = '\0';        }        else        {            buffer = (unsigned char*)malloc(sizeof(unsigned char) * size);        }        readsize = fread(buffer, sizeof(unsigned char), size, fp);        fclose(fp);        if (forString && readsize < size)        {            buffer[readsize] = '\0';        }    } while (0);    if (nullptr == buffer || 0 == readsize)    {        CCLOG("Get data from file %s failed", filename.c_str());    }    else    {#ifdef CRYPT_RES        pack_crpyt( buffer, (unsigned long )readsize );#endif        ret.fastSet(buffer, readsize);    }    return ret;}bool AppDelegate::applicationDidFinishLaunching(){    char key[256]={"hellodytqwe123!@#&*"};    pack_crpyt_init( (unsigned char*)key, strlen( key ) );        // set default FPS    Director::getInstance()->setAnimationInterval(1.0 / 60.0f);        Director::getInstance()->setClearColor(Color4F(0, 0, 0, 0));    // register lua module    auto engine = LuaEngine::getInstance();    ScriptEngineManager::getInstance()->setScriptEngine(engine);    lua_State* L = engine->getLuaStack()->getLuaState();    lua_module_register(L);    register_all_packages();    #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)    register_all_cocos2dx_TalkingDataGA(L);    register_all_cocos2dx_TDGAAccount(L);    register_all_cocos2dx_TDGAMission(L);    register_all_cocos2dx_TDGAVirtualCurrency(L);    register_all_cocos2dx_TDGAItem(L);#endif    LuaStack* stack = engine->getLuaStack();    stack->setXXTEAKeyAndSign("2dxLua", strlen("2dxLua"), "XXTEA", strlen("XXTEA"));    //register custom function    //LuaStack* stack = engine->getLuaStack();    //register_custom_function(stack->getLuaState());    auto state = engine->getLuaStack()->getLuaState();    if ( state )    {        lua_getglobal( state , "_G");        register_all_cocos2dx_custom( state );        register_all_cocos2dx_custom_manual( state );        lua_settop( state , 0);    }#if (COCOS2D_DEBUG > 0) && (CC_CODE_IDE_DEBUG_SUPPORT > 0)    std::vector<std::string> searchDirs ;        searchDirs.push_back( "" );    searchDirs.push_back( "res" );    searchDirs.push_back( "src" );        cocos2d::FileUtils::getInstance()->setSearchPaths( searchDirs );    Cocos2dUtils::getOrCreateGLProgram( "res/shader/highlight.vsh", "res/shader/highlight.fsh" );    // NOTE:Please don't remove this call if you want to debug with Cocos Code IDE    auto runtimeEngine = RuntimeEngine::getInstance();    runtimeEngine->addRuntime(RuntimeLuaImpl::create(), kRuntimeEngineLua);    runtimeEngine->start();#else    std::vector<std::string> searchDirs ;        searchDirs.push_back( "" );    searchDirs.push_back( "res" );    searchDirs.push_back( "src" );        cocos2d::FileUtils::getInstance()->setSearchPaths( searchDirs );    Cocos2dUtils::getOrCreateGLProgram( "res/shader/highlight.vsh", "res/shader/highlight.fsh" );        if (engine->executeScriptFile("src/main.lua"))    {        return false;    }#endif    return true;}Data FileUtils::getDataFromFile(const std::string& filename){    return getData(filename, false);}void Cocos2dUtils::readBufferFromFile( ByteBuffer* buffer, const std::string fileName ){    Data data =  FileUtils::getInstance()->getDataFromFile( fileName );    if( data.getSize() > 0 )    {        buffer->writeBytes( ( char* )data.getBytes(), data.getSize() );    }}////  RC4.h//  knight////  Created by yingtuodeng on 14-6-29.////#ifndef __knight__RC4__#define __knight__RC4__/* 初始化函数 参数1是一个256长度的char型数组，定义为: unsigned char sBox[256]; 参数2是密钥，其内容可以随便定义：char key[256]; 参数3是密钥的长度，Len = strlen(key); */void rc4_init(unsigned char*s,unsigned char*key,unsigned long Len);/*加解密 其中，参数1是上边rc4_init函数中，被搅乱的S-box; 参数2是需要加密的数据data; 参数3是data的长度. */void rc4_crypt(unsigned char*s,unsigned char*Data,unsigned long Len);void pack_crpyt( unsigned char* data, unsigned long len );void pack_crpyt_init( unsigned char* key, unsigned long key_len );#endif /* defined(__knight__RC4__) */#include "RC4.h"#include <string>/* 初始化函数 参数1是一个256长度的char型数组，定义为: unsigned char sBox[256]; 参数2是密钥，其内容可以随便定义：char key[256]; 参数3是密钥的长度，Len = strlen(key); */void rc4_init(unsigned char*s,unsigned char*key,unsigned long Len){    int i=0,j=0;    char k[256]={0};    unsigned char tmp=0;    for(i=0;i<256;i++)    {        s[i]=i;        k[i]=key[i%Len];    }    for(i=0;i<256;i++)    {        j=(j+s[i]+k[i])%256;        tmp=s[i];        s[i]=s[j];//交换s[i]和s[j]        s[j]=tmp;    }}/*加解密 其中，参数1是上边rc4_init函数中，被搅乱的S-box; 参数2是需要加密的数据data; 参数3是data的长度. */void rc4_crypt(unsigned char*s,unsigned char*Data,unsigned long Len){    int i=0,j=0,t=0;    unsigned long k=0;    unsigned char tmp;    for(k=0;k<Len;k++)    {        i=(i+1)%256;        j=(j+s[i])%256;        tmp=s[i];        s[i]=s[j];//交换s[x]和s[y]        s[j]=tmp;        t=(s[i]+s[j])%256;        Data[k]^=s[t];    }}unsigned char __g_rc4_sBox[ 256 ] = { 0 };void pack_crpyt( unsigned char* data, unsigned long len ){    char sbox[256];    memcpy( sbox, __g_rc4_sBox, 256 );        rc4_crypt( (unsigned char*)sbox , data, len );}void pack_crpyt_init( unsigned char* key, unsigned long key_len ){    rc4_init( __g_rc4_sBox, key, key_len );}