ssl/ssl_init.c

   1 /*
   2  * Written by Matt Caswell for the OpenSSL project.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2016 The OpenSSL Project.  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  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    openssl-core@openssl.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include "e_os.h"
  59
  60 #include "internal/threads.h"
  61 #include "internal/err.h"
  62 #include <openssl/crypto.h>
  63 #include <openssl/evp.h>
  64 #include <assert.h>
  65 #include "ssl_locl.h"
  66
  67 static int stopped;
  68
  69 static void ssl_library_stop(void);
  70
  71 static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
  72 static int ssl_base_inited = 0;
  73 static void ossl_init_ssl_base(void)
  74 {
  75 #ifdef OPENSSL_INIT_DEBUG
  76     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
  77                     "Adding SSL ciphers and digests\n");
  78 #endif
  79 #ifndef OPENSSL_NO_DES
  80     EVP_add_cipher(EVP_des_cbc());
  81     EVP_add_cipher(EVP_des_ede3_cbc());
  82 #endif
  83 #ifndef OPENSSL_NO_IDEA
  84     EVP_add_cipher(EVP_idea_cbc());
  85 #endif
  86 #ifndef OPENSSL_NO_RC4
  87     EVP_add_cipher(EVP_rc4());
  88 # ifndef OPENSSL_NO_MD5
  89     EVP_add_cipher(EVP_rc4_hmac_md5());
  90 # endif
  91 #endif
  92 #ifndef OPENSSL_NO_RC2
  93     EVP_add_cipher(EVP_rc2_cbc());
  94     /*
  95      * Not actually used for SSL/TLS but this makes PKCS#12 work if an
  96      * application only calls SSL_library_init().
  97      */
  98     EVP_add_cipher(EVP_rc2_40_cbc());
  99 #endif
 100     EVP_add_cipher(EVP_aes_128_cbc());
 101     EVP_add_cipher(EVP_aes_192_cbc());
 102     EVP_add_cipher(EVP_aes_256_cbc());
 103     EVP_add_cipher(EVP_aes_128_gcm());
 104     EVP_add_cipher(EVP_aes_256_gcm());
 105     EVP_add_cipher(EVP_aes_128_ccm());
 106     EVP_add_cipher(EVP_aes_256_ccm());
 107     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha1());
 108     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha1());
 109     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha256());
 110     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha256());
 111 #ifndef OPENSSL_NO_CAMELLIA
 112     EVP_add_cipher(EVP_camellia_128_cbc());
 113     EVP_add_cipher(EVP_camellia_256_cbc());
 114 #endif
 115 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
 116     EVP_add_cipher(EVP_chacha20_poly1305());
 117 #endif
 118
 119 #ifndef OPENSSL_NO_SEED
 120     EVP_add_cipher(EVP_seed_cbc());
 121 #endif
 122
 123 #ifndef OPENSSL_NO_MD5
 124     EVP_add_digest(EVP_md5());
 125     EVP_add_digest_alias(SN_md5, "ssl3-md5");
 126     EVP_add_digest(EVP_md5_sha1());
 127 #endif
 128     EVP_add_digest(EVP_sha1()); /* RSA with sha1 */
 129     EVP_add_digest_alias(SN_sha1, "ssl3-sha1");
 130     EVP_add_digest_alias(SN_sha1WithRSAEncryption, SN_sha1WithRSA);
 131     EVP_add_digest(EVP_sha224());
 132     EVP_add_digest(EVP_sha256());
 133     EVP_add_digest(EVP_sha384());
 134     EVP_add_digest(EVP_sha512());
 135 #ifndef OPENSSL_NO_COMP
 136 #ifdef OPENSSL_INIT_DEBUG
 137     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
 138                     "SSL_COMP_get_compression_methods()\n");
 139 #endif
 140     /*
 141      * This will initialise the built-in compression algorithms. The value
 142      * returned is a STACK_OF(SSL_COMP), but that can be discarded safely
 143      */
 144     SSL_COMP_get_compression_methods();
 145 #endif
 146     /* initialize cipher/digest methods table */
 147     ssl_load_ciphers();
 148
 149 #ifdef OPENSSL_INIT_DEBUG
 150     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
 151                     "SSL_add_ssl_module()\n");
 152 #endif
 153     SSL_add_ssl_module();
 154     /*
 155      * We ignore an error return here. Not much we can do - but not that bad
 156      * either. We can still safely continue.
 157      */
 158     OPENSSL_atexit(ssl_library_stop);
 159     ssl_base_inited = 1;
 160 }
 161
 162 static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
 163 static int ssl_strings_inited = 0;
 164 static void ossl_init_load_ssl_strings(void)
 165 {
 166     /*
 167      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 168      * pulling in all the error strings during static linking
 169      */
 170 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 171 # ifdef OPENSSL_INIT_DEBUG
 172         fprintf(stderr, "OPENSSL_INIT: ossl_init_load_ssl_strings: "
 173                         "ERR_load_SSL_strings()\n");
 174 # endif
 175     ERR_load_SSL_strings();
 176 #endif
 177     ssl_strings_inited = 1;
 178 }
 179
 180 static void ossl_init_no_load_ssl_strings(void)
 181 {
 182     /* Do nothing in this case */
 183     return;
 184 }
 185
 186 static void ssl_library_stop(void)
 187 {
 188     /* Might be explicitly called and also by atexit */
 189     if (stopped)
 190         return;
 191     stopped = 1;
 192
 193     if (ssl_base_inited) {
 194 #ifndef OPENSSL_NO_COMP
 195 #ifdef OPENSSL_INIT_DEBUG
 196         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 197                         "ssl_comp_free_compression_methods_int()\n");
 198 #endif
 199         ssl_comp_free_compression_methods_int();
 200 #endif
 201     }
 202
 203     if (ssl_strings_inited) {
 204 #ifdef OPENSSL_INIT_DEBUG
 205         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 206                         "err_free_strings_int()\n");
 207 #endif
 208         /*
 209          * If both crypto and ssl error strings are inited we will end up
 210          * calling err_free_strings_int() twice - but that's ok. The second
 211          * time will be a no-op. It's easier to do that than to try and track
 212          * between the two libraries whether they have both been inited.
 213          */
 214         err_free_strings_int();
 215     }
 216 }
 217
 218
 219 /*
 220  * If this function is called with a non NULL settings value then it must be
 221  * called prior to any threads making calls to any OpenSSL functions,
 222  * i.e. passing a non-null settings value is assumed to be single-threaded.
 223  */
 224 int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 225 {
 226     static int stoperrset = 0;
 227
 228     if (stopped) {
 229         if (!stoperrset) {
 230             /*
 231              * We only ever set this once to avoid getting into an infinite
 232              * loop where the error system keeps trying to init and fails so
 233              * sets an error etc
 234              */
 235             stoperrset = 1;
 236             SSLerr(SSL_F_OPENSSL_INIT_SSL, ERR_R_INIT_FAIL);
 237         }
 238         return 0;
 239     }
 240
 241     if (!OPENSSL_init_crypto(opts | OPENSSL_INIT_ADD_ALL_CIPHERS
 242                              | OPENSSL_INIT_ADD_ALL_DIGESTS, settings))
 243         return 0;
 244
 245     if (!CRYPTO_THREAD_run_once(&ssl_base, ossl_init_ssl_base))
 246         return 0;
 247
 248     if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
 249             && !CRYPTO_THREAD_run_once(&ssl_strings,
 250                                        ossl_init_no_load_ssl_strings))
 251         return 0;
 252
 253     if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
 254             && !CRYPTO_THREAD_run_once(&ssl_strings,
 255                                        ossl_init_load_ssl_strings))
 256         return 0;
 257
 258     return 1;
 259 }
 260