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__FBSDID("$FreeBSD$");
33
34#include <sys/types.h>
35#include <stdbool.h>
36#include <syslog.h>
37
38/*
39 * The following functions were removed from OpenBSD for good reasons:
40 *
41 *  - arc4random_stir()
42 *  - arc4random_addrandom()
43 *
44 * On FreeBSD, for backward ABI compatibility, we provide two wrapper which
45 * logs this event and returns.
46 */
47
48void __arc4random_stir_fbsd11(void);
49void __arc4random_addrandom_fbsd11(u_char *, int);
50
51void
52__arc4random_stir_fbsd11(void)
53{
54	static bool warned = false;
55
56	if (!warned)
57		syslog(LOG_DEBUG, "Deprecated function arc4random_stir() called");
58	warned = true;
59}
60
61void
62__arc4random_addrandom_fbsd11(u_char * dummy1 __unused, int dummy2 __unused)
63{
64	static bool warned = false;
65
66	if (!warned)
67		syslog(LOG_DEBUG, "Deprecated function arc4random_addrandom() called");
68	warned = true;
69}
70
71__sym_compat(arc4random_stir, __arc4random_stir_fbsd11, FBSD_1.0);
72__sym_compat(arc4random_addrandom, __arc4random_addrandom_fbsd11, FBSD_1.0);
73