1/* $OpenBSD: ssl_init.c,v 1.6 2023/11/22 15:53:53 tb Exp $ */
2/*
3 * Copyright (c) 2018 Bob Beck <beck@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* OpenSSL style init */
19
20#include <pthread.h>
21#include <stdio.h>
22
23#include <openssl/objects.h>
24
25#include "ssl_local.h"
26
27static pthread_t ssl_init_thread;
28
29int
30SSL_library_init(void)
31{
32	return OPENSSL_init_ssl(0, NULL);
33}
34LSSL_ALIAS(SSL_library_init);
35
36static void
37OPENSSL_init_ssl_internal(void)
38{
39	ssl_init_thread = pthread_self();
40	SSL_load_error_strings();
41}
42
43int
44OPENSSL_init_ssl(uint64_t opts, const void *settings)
45{
46	static pthread_once_t once = PTHREAD_ONCE_INIT;
47
48	if (pthread_equal(pthread_self(), ssl_init_thread))
49		return 1; /* don't recurse */
50
51	OPENSSL_init_crypto(opts, settings);
52
53	if (pthread_once(&once, OPENSSL_init_ssl_internal) != 0)
54		return 0;
55
56	return 1;
57}
58LSSL_ALIAS(OPENSSL_init_ssl);
59