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      1 /*	$NetBSD: orand_key.c,v 1.1 2025/07/17 14:26:11 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 
     34 void des_random_seed(des_cblock *key)
     35 {
     36 }
     37 
     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