www.pudn.com > sslref30.zip > rand_key.c

/* rand_key.c */ 
/* Copyright (C) 1993 Eric Young - see README for more details */ 
#include "des_locl.h" 
 
int des_random_key(ret) 
des_cblock ret; 
    { 
    des_key_schedule ks; 
    static unsigned long c=0; 
    static unsigned short pid=0; 
    static des_cblock data={0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef}; 
    des_cblock key; 
    unsigned char *p; 
    unsigned long t; 
 
#ifdef MSDOS 
    pid=1; 
#else 
    if (!pid) pid=getpid(); 
#endif 
    p=key; 
    t=(unsigned long)time(NULL); 
    l2c(t,p); 
    t=(unsigned long)((pid)|((c++)<<16)); 
    l2c(t,p); 
 
    des_set_odd_parity((des_cblock *)data); 
    des_set_key((des_cblock *)data,ks); 
    des_cbc_cksum((des_cblock *)key,(des_cblock *)key, 
        (long)sizeof(key),ks,(des_cblock *)data); 
    des_set_odd_parity((des_cblock *)key); 
    des_cbc_cksum((des_cblock *)key,(des_cblock *)key, 
        (long)sizeof(key),ks,(des_cblock *)data); 
 
    bcopy(key,ret,sizeof(key)); 
    bzero(key,sizeof(key)); 
    bzero(ks,sizeof(ks)); 
    t=0; 
    return(0); 
    }