1 /*-
2 * Copyright (c) 2010
3 * Thorsten Glaser <tg@mirbsd.org>
4 *
5 * Provided that these terms and disclaimer and all copyright notices
6 * are retained or reproduced in an accompanying document, permission
7 * is granted to deal in this work without restriction, including un-
8 * limited rights to use, publicly perform, distribute, sell, modify,
9 * merge, give away, or sublicence.
10 *
11 * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
12 * the utmost extent permitted by applicable law, neither express nor
13 * implied; without malicious intent or gross negligence. In no event
14 * may a licensor, author or contributor be held liable for indirect,
15 * direct, other damage, loss, or other issues arising in any way out
16 * of dealing in the work, even if advised of the possibility of such
17 * damage or existence of a defect, except proven that it results out
18 * of said person's immediate fault when using the work as intended.
19 */
20
21 #include <sys/types.h>
22 #include <sys/time.h>
23 #include <syskern/libckern.h>
24 #include <stdlib.h>
25 #include "arc4random.h"
26 #include "thread_private.h"
27
28 __RCSID("$MirOS: src/lib/libc/crypt/arc4random_pushb_fast.c,v 1.3 2014/03/29 10:35:46 tg Exp $");
29
30 void
arc4random_pushb_fast(const void * buf,size_t len)31 arc4random_pushb_fast(const void *buf, size_t len)
32 {
33 struct {
34 struct timespec tp;
35 const void *dp, *sp;
36 size_t sz;
37 } pbuf;
38
39 clock_gettime(CLOCK_MONOTONIC, &pbuf.tp);
40 pbuf.dp = buf;
41 pbuf.sp = &pbuf;
42 pbuf.sz = len;
43
44 _ARC4_LOCK();
45 arc4random_roundhash(a4state.pool, &a4state.a4s_poolptr,
46 &pbuf, sizeof(pbuf));
47 arc4random_roundhash(a4state.pool, &a4state.a4s_poolptr, buf, len);
48 _ARC4_UNLOCK();
49 }
50