1 /* $NetBSD: orand_key.c,v 1.1 2009/07/19 23:30:58 christos Exp $ */
2
3 /*
4 * Copyright (C) 2003 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include "des_locl.h"
33
des_random_seed(des_cblock * key)34 void des_random_seed(des_cblock *key)
35 {
36 }
37
des_random_key(des_cblock * ret)38 int des_random_key(des_cblock *ret)
39 {
40 u_int32_t v;
41 u_int8_t *p, *ep;
42
43 do {
44 p = (u_int8_t *)ret;
45 ep = (u_int8_t *)(ret + sizeof(*ret));
46 while (p + sizeof(v) <= ep) {
47 v = arc4random();
48 *(u_int32_t *)p = v;
49 p += sizeof(v);
50 }
51 if (ep - p) {
52 v = arc4random();
53 memcpy(p, &v, ep - p);
54 }
55 } while (des_is_weak_key(ret));
56 des_set_odd_parity(ret);
57 return (1);
58 }
59