cocos rc4加解密

概述static Data getData(const std::string& filename, bool forString){ if (filename.empty()) { return Data::Null; } Data ret; unsigned char* buffer = nullptr; size_t size

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,SEEK_END);        size = ftell(fp);        fseek(fp,SEEK_SET);        if (forString)        {            buffer = (unsigned char*)malloc(sizeof(unsigned char) * (size + 1));            buffer[size] = '';        }        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] = '';        }    } 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));    // 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;}std::string fileUtils::getStringFromfile(const std::string& filename){    Data data = getData(filename,true);    if (data.isNull())        return "";    std::string ret((const char*)data.getBytes());    return ret;}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 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,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 );}

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