3ecb_enc.c

来自「Netscape公司提供的安全套接字层」· C语言 代码 · 共 31 行

/* 3ecb_enc.c */
/* Copyright (C) 1993 Eric Young - see README for more details */
#include "des_locl.h"

int des_3ecb_encrypt(input,output,ks1,ks2,encrypt)
des_cblock *input;
des_cblock *output;
des_key_schedule ks1,ks2;
int encrypt;
    {
    register unsigned long l0,l1,t;
    register unsigned char *in,*out;
    unsigned long ll[2];

    in=(unsigned char *)input;
    out=(unsigned char *)output;
    c2l(in,l0);
    c2l(in,l1);
    ll[0]=l0;
    ll[1]=l1;
    des_encrypt(ll,ll,ks1,encrypt);
    des_encrypt(ll,ll,ks2,!encrypt);
    des_encrypt(ll,ll,ks1,encrypt);
    l0=ll[0];
    l1=ll[1];
    l2c(l0,out);
    l2c(l1,out);
    return(0);
    }