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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@171 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Unknown User d91-jda
1995-10-23 11:20:30 +00:00
parent b1fce0a864
commit b33abb44fd
118 changed files with 23033 additions and 0 deletions
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44
lib/des/rand_key.c Normal file
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/* rand_key.c */
/* Copyright (C) 1993 Eric Young - see README for more details */
#include "des_locl.h"
int des_random_key(unsigned char *ret)
{
des_key_schedule ks;
static u_int32_t 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;
u_int32_t t, now;
now=(unsigned long)time(NULL);
#ifdef MSDOS
pid=1;
#else
if (!pid) pid=getpid();
#endif
try_again:
p=key;
t=now;
l2c(t,p);
t=(u_int32_t)((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);
memcpy(ret,key,sizeof(key));
memset(key,0,sizeof(key));
memset(ks,0,sizeof(ks));
t=0;
/* random key must have odd parity and not be weak */
des_set_odd_parity((des_cblock *)ret);
if (des_is_weak_key((des_cblock *)ret)) goto try_again;
return(0);
}