1 /*-
2 * Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #include <sys/types.h>
26 #include <sys/param.h>
27
28 #ifdef _KERNEL
29 # include <sys/kmem.h>
30 #else
31 # include <arpa/inet.h>
32 # include <ctype.h>
33 # include <inttypes.h>
34 # include <stdarg.h>
35 # include <stdio.h>
36 # include <stdlib.h>
37 # include <string.h>
38 # include <time.h>
39 # include <unistd.h>
40 #endif
41
42 #include "rand.h"
43
44 int
RAND_bytes(unsigned char * buf,int num)45 RAND_bytes(unsigned char *buf, int num)
46 {
47 uint32_t r;
48 size_t cc;
49 int i;
50
51 if (buf == NULL || num < 0) {
52 return 0;
53 }
54 for (i = 0 ; i < num ; i += sizeof(r)) {
55 r = arc4random();
56 cc = MIN(sizeof(r), (size_t)(num - i));
57 (void) memcpy(&buf[i], &r, cc);
58 }
59 return 1;
60 }
61