lib/libcrypto/conf/conf_sap.c

   1 /* $OpenBSD: conf_sap.c,v 1.14 2018/03/19 03:56:08 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 #ifndef OPENSSL_NO_ENGINE
  71 #include <openssl/engine.h>
  72 #endif
  73
  74 /* This is the automatic configuration loader: it is called automatically by
  75  * OpenSSL when any of a number of standard initialisation functions are called,
  76  * unless this is overridden by calling OPENSSL_no_config()
  77  */
  78
  79 static pthread_once_t openssl_configured = PTHREAD_ONCE_INIT;
  80
  81 static const char *openssl_config_name;
  82
  83 static void
  84 OPENSSL_config_internal(void)
  85 {
  86         OPENSSL_load_builtin_modules();
  87 #ifndef OPENSSL_NO_ENGINE
  88         /* Need to load ENGINEs */
  89         ENGINE_load_builtin_engines();
  90 #endif
  91         /* Add others here? */
  92
  93         ERR_clear_error();
  94         if (CONF_modules_load_file(NULL, openssl_config_name,
  95             CONF_MFLAGS_DEFAULT_SECTION|CONF_MFLAGS_IGNORE_MISSING_FILE) <= 0) {
  96                 BIO *bio_err;
  97                 ERR_load_crypto_strings();
  98                 if ((bio_err = BIO_new_fp(stderr, BIO_NOCLOSE)) != NULL) {
  99                         BIO_printf(bio_err, "Auto configuration failed\n");
 100                         ERR_print_errors(bio_err);
 101                         BIO_free(bio_err);
 102                 }
 103                 exit(1);
 104         }
 105
 106         return;
 107 }
 108
 109 int
 110 OpenSSL_config(const char *config_name)
 111 {
 112         /* Don't override if NULL */
 113         /*
 114          * Note - multiple threads calling this with *different* config names
 115          * is probably not advisable.  One thread will win, but you don't know
 116          * if it will be the same thread as wins the pthread_once.
 117          */
 118         if (config_name != NULL)
 119                 openssl_config_name = config_name;
 120
 121         if (OPENSSL_init_crypto(0, NULL) == 0)
 122                 return 0;
 123
 124         if (pthread_once(&openssl_configured, OPENSSL_config_internal) != 0)
 125                 return 0;
 126
 127         return 1;
 128 }
 129
 130 void
 131 OPENSSL_config(const char *config_name)
 132 {
 133         (void) OpenSSL_config(config_name);
 134 }
 135
 136 static void
 137 OPENSSL_no_config_internal(void)
 138 {
 139 }
 140
 141 int
 142 OpenSSL_no_config(void)
 143 {
 144         if (pthread_once(&openssl_configured, OPENSSL_no_config_internal) != 0)
 145                 return 0;
 146
 147         return 1;
 148 }
 149
 150 void
 151 OPENSSL_no_config(void)
 152 {
 153         (void) OpenSSL_no_config();
 154 }