tea.h

tea 加密算法 qq使用的就是这个加密算法来 解决登陆问题

#ifndef TEA_H
#define TEA_H

/*
*for htonl,htonl
*do remember link "ws2_32.lib"
*/
#include <winsock2.h>
#include "util.h"

class TEA {
public:
    TEA(const byte *key, int round = 32, bool isNetByte = false);
    TEA(const TEA &rhs);
    TEA& operator=(const TEA &rhs);
    void encrypt(const byte *in, byte *out);
    void decrypt(const byte *in, byte *out);
private:
    void encrypt(const ulong *in, ulong *out);
    void decrypt(const ulong *in, ulong *out);
    ulong ntoh(ulong netlong) { return _isNetByte ? ntohl(netlong) : netlong; }
   ulong hton(ulong hostlong) { return _isNetByte ? htonl(hostlong) : hostlong; }
private:
    int _round; //iteration round to encrypt or decrypt
    bool _isNetByte; //whether input bytes come from network
    byte _key[16]; //encrypt or decrypt key
};

#endif/*TEA_H*/