rc4.h

RSA C++源代码DEMO,附加DESMD5等众多算法

/*************************************************************************
**                                                                      **
**  rc4.h (header file for rc4.cxx)                                     **
**                                                                      **
**  RIVEST CIPHER FOUR (RC4) RANDOM NUMBER GENERATOR AND STREAM CIPHER  **
**                                                                      **
**  Copyright (c)1996 Markku-Juhani O. Saarinen <[e-mail]>      **
**                                                                      **
*************************************************************************/
#ifndef __RC_4_H
#define __RC_4_H

#include <string.h>
#include "cryputil.h"

class TRC4
{
    unsigned char S[0x100];
    unsigned int rc4_i;
    unsigned int rc4_j;

public:

    // konstruktori ja destruktori

    TRC4();
    TRC4(unsigned char *key, int keylen);
    ~TRC4();

    // alustus

    void init(unsigned char *key, int keylen);

    // sijoitusoperaattori

    TRC4& operator=  (TRC4&);

    // kryptaus ja dekryptaus

    void crypt(unsigned char *, size_t);

    // satunnaisluvut

    void rand(unsigned char *, size_t);
};

#endif