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开源精神必须支持~

学习一下吧

感谢分享，很给力！~

感谢分享，很给力！~

开源精神必须支持，大家一起努力~

能加上时间校验就好了，就死5秒过期机制

这是stl版本的,纯字节集的:

std::vector<unsigned char> endecode( const std::vector<unsigned char> & data, const std::vector<unsigned char> & key, char level, std::vector<unsigned char> rand )
{
        if ( key.empty() ) return std::vector<unsigned char>();
        std::vector<unsigned char> result( data.size(), 0 );
        for ( size_t i = 0; i < data.size(); i++ ) {

                result [ i ] = ( data [ i ] ^ key [ ( ( i + 1 ) % key.size() ) ] ) ^ rand [ ( i + 1 ) % level ];
        }
        return result;
}

std::vector<unsigned char> encode( const std::vector<unsigned char> & data, const std::vector<unsigned char> & key, char level ) {
        if ( level == 0 ) level = 1;
        auto len = data.size() - level;
        if ( !len ) return std::vector<unsigned char>();
        std::vector<unsigned char> _you( data.end() - len, data.end() );
        std::vector<unsigned char> _zuo( data.begin(), data.begin() + level );

        return endecode( _you, key, level, _zuo );
}

std::vector<unsigned char> decode( const std::vector<unsigned char> & data, const std::vector<unsigned char> & key, char level )
{
        if( data.empty()) return std::vector<unsigned char>();
        if ( level == 0 ) level = 1;
        std::vector<unsigned char> random( level, 0 );
        std::vector<unsigned char> result;
        std::srand( static_cast< unsigned int >( std::time( nullptr ) ) );
        for ( int i = 0; i < level; ++i ) {
                random [ i ] = std::rand() % 256;
        }
        auto code = endecode( data, key, level, random );
        if ( code.empty() ) return result;

        result.insert( result.end(), random.begin(), random.end() );
        result.insert( result.end(), code.begin(), code.end() );
        return result;
}

int main()
{
        std::vector<unsigned char> fff  = { 'w','r','n','m','s',',','b' ,'!','\0' };
        std::vector<unsigned char> keys = { 'k','e','y','s' };

        auto de = decode( fff, keys, 3 );
        auto en = encode( de, keys, 3 );

        std::cout << en.data() << std::endl;

        return 0;
}

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