1/* $OpenBSD: conf_sap.c,v 1.16 2024/04/09 13:56:30 beck Exp $ */
2/* Written by Stephen Henson (steve@openssl.org) for the OpenSSL
3 * project 2001.
4 */
5/* ====================================================================
6 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <pthread.h>
60#include <stdio.h>
61
62#include <openssl/opensslconf.h>
63
64#include <openssl/asn1.h>
65#include <openssl/conf.h>
66#include <openssl/crypto.h>
67#include <openssl/err.h>
68#include <openssl/x509.h>
69
70/* This is the automatic configuration loader: it is called automatically by
71 * OpenSSL when any of a number of standard initialisation functions are called,
72 * unless this is overridden by calling OPENSSL_no_config()
73 */
74
75static pthread_once_t openssl_configured = PTHREAD_ONCE_INIT;
76
77static const char *openssl_config_name;
78
79static void
80OPENSSL_config_internal(void)
81{
82	OPENSSL_load_builtin_modules();
83	/* Add others here? */
84
85	ERR_clear_error();
86	if (CONF_modules_load_file(NULL, openssl_config_name,
87	    CONF_MFLAGS_DEFAULT_SECTION|CONF_MFLAGS_IGNORE_MISSING_FILE) <= 0) {
88		BIO *bio_err;
89		ERR_load_crypto_strings();
90		if ((bio_err = BIO_new_fp(stderr, BIO_NOCLOSE)) != NULL) {
91			BIO_printf(bio_err, "Auto configuration failed\n");
92			ERR_print_errors(bio_err);
93			BIO_free(bio_err);
94		}
95		exit(1);
96	}
97
98	return;
99}
100
101int
102OpenSSL_config(const char *config_name)
103{
104	/* Don't override if NULL */
105	/*
106	 * Note - multiple threads calling this with *different* config names
107	 * is probably not advisable.  One thread will win, but you don't know
108	 * if it will be the same thread as wins the pthread_once.
109	 */
110	if (config_name != NULL)
111		openssl_config_name = config_name;
112
113	if (OPENSSL_init_crypto(0, NULL) == 0)
114		return 0;
115
116	if (pthread_once(&openssl_configured, OPENSSL_config_internal) != 0)
117		return 0;
118
119	return 1;
120}
121
122void
123OPENSSL_config(const char *config_name)
124{
125	(void) OpenSSL_config(config_name);
126}
127LCRYPTO_ALIAS(OPENSSL_config);
128
129static void
130OPENSSL_no_config_internal(void)
131{
132}
133
134int
135OpenSSL_no_config(void)
136{
137	if (pthread_once(&openssl_configured, OPENSSL_no_config_internal) != 0)
138		return 0;
139
140	return 1;
141}
142
143void
144OPENSSL_no_config(void)
145{
146	(void) OpenSSL_no_config();
147}
148LCRYPTO_ALIAS(OPENSSL_no_config);
149