1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2018 Google LLC
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #include <sys/cdefs.h>
32 #include <sys/types.h>
33 #include <stdbool.h>
34 #include <syslog.h>
35
36 /*
37 * The following functions were removed from OpenBSD for good reasons:
38 *
39 * - arc4random_stir()
40 * - arc4random_addrandom()
41 *
42 * On FreeBSD, for backward ABI compatibility, we provide two wrapper which
43 * logs this event and returns.
44 */
45
46 void __arc4random_stir(void);
47 void __arc4random_addrandom(u_char *, int);
48
49 void
__arc4random_stir(void)50 __arc4random_stir(void)
51 {
52 static bool warned = false;
53
54 if (!warned)
55 syslog(LOG_DEBUG, "Deprecated function arc4random_stir() called");
56 warned = true;
57 }
58
59 void
__arc4random_addrandom(u_char * dummy1 __unused,int dummy2 __unused)60 __arc4random_addrandom(u_char * dummy1 __unused, int dummy2 __unused)
61 {
62 static bool warned = false;
63
64 if (!warned)
65 syslog(LOG_DEBUG, "Deprecated function arc4random_addrandom() called");
66 warned = true;
67 }
68
69 __weak_reference(__arc4random_stir, arc4random_stir);
70 __weak_reference(__arc4random_stir, _arc4random_stir);
71 __weak_reference(__arc4random_addrandom, arc4random_addrandom);
72 __weak_reference(__arc4random_addrandom, _arc4random_addrandom);
73