/*************************************************************************
**                                                                      **
**  rc4.h (header file for rc4.cxx)                                     **
**                                                                      **
**  RIVEST CIPHER FOUR (RC4) RANDOM NUMBER GENERATOR AND STREAM CIPHER  **
**                                                                      **
**  Copyright (c)1996 Markku-Juhani O. Saarinen <mjos@math.jyu.fi>      **
**                                                                      **
*************************************************************************/

#include <string.h>

class rc4
{
    unsigned char S[0x100];
    unsigned int rc4_i;
    unsigned int rc4_j;

public:

    // konstruktori ja destruktori

    rc4();
    rc4(unsigned char *, int);
    ~rc4();

    // alustus

    void init(unsigned char *, int);

    // sijoitusoperaattori
    
    rc4& operator=  (rc4&);
    
    // kryptaus ja dekryptaus
    
    void crypt(unsigned char *, size_t);

    // satunnaisluvut

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