ssl/ssl_init.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "e_os.h"
  11
  12 #include "internal/err.h"
  13 #include <openssl/crypto.h>
  14 #include <openssl/evp.h>
  15 #include <assert.h>
  16 #include "ssl_locl.h"
  17 #include "internal/thread_once.h"
  18
  19 static int stopped;
  20
  21 static void ssl_library_stop(void);
  22
  23 static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
  24 static int ssl_base_inited = 0;
  25 DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)
  26 {
  27 #ifdef OPENSSL_INIT_DEBUG
  28     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
  29             "Adding SSL ciphers and digests\n");
  30 #endif
  31 #ifndef OPENSSL_NO_DES
  32     EVP_add_cipher(EVP_des_cbc());
  33     EVP_add_cipher(EVP_des_ede3_cbc());
  34 #endif
  35 #ifndef OPENSSL_NO_IDEA
  36     EVP_add_cipher(EVP_idea_cbc());
  37 #endif
  38 #ifndef OPENSSL_NO_RC4
  39     EVP_add_cipher(EVP_rc4());
  40 # ifndef OPENSSL_NO_MD5
  41     EVP_add_cipher(EVP_rc4_hmac_md5());
  42 # endif
  43 #endif
  44 #ifndef OPENSSL_NO_RC2
  45     EVP_add_cipher(EVP_rc2_cbc());
  46     /*
  47      * Not actually used for SSL/TLS but this makes PKCS#12 work if an
  48      * application only calls SSL_library_init().
  49      */
  50     EVP_add_cipher(EVP_rc2_40_cbc());
  51 #endif
  52     EVP_add_cipher(EVP_aes_128_cbc());
  53     EVP_add_cipher(EVP_aes_192_cbc());
  54     EVP_add_cipher(EVP_aes_256_cbc());
  55     EVP_add_cipher(EVP_aes_128_gcm());
  56     EVP_add_cipher(EVP_aes_256_gcm());
  57     EVP_add_cipher(EVP_aes_128_ccm());
  58     EVP_add_cipher(EVP_aes_256_ccm());
  59     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha1());
  60     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha1());
  61     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha256());
  62     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha256());
  63 #ifndef OPENSSL_NO_CAMELLIA
  64     EVP_add_cipher(EVP_camellia_128_cbc());
  65     EVP_add_cipher(EVP_camellia_256_cbc());
  66 #endif
  67 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
  68     EVP_add_cipher(EVP_chacha20_poly1305());
  69 #endif
  70
  71 #ifndef OPENSSL_NO_SEED
  72     EVP_add_cipher(EVP_seed_cbc());
  73 #endif
  74
  75 #ifndef OPENSSL_NO_MD5
  76     EVP_add_digest(EVP_md5());
  77     EVP_add_digest_alias(SN_md5, "ssl3-md5");
  78     EVP_add_digest(EVP_md5_sha1());
  79 #endif
  80     EVP_add_digest(EVP_sha1()); /* RSA with sha1 */
  81     EVP_add_digest_alias(SN_sha1, "ssl3-sha1");
  82     EVP_add_digest_alias(SN_sha1WithRSAEncryption, SN_sha1WithRSA);
  83     EVP_add_digest(EVP_sha224());
  84     EVP_add_digest(EVP_sha256());
  85     EVP_add_digest(EVP_sha384());
  86     EVP_add_digest(EVP_sha512());
  87 #ifndef OPENSSL_NO_COMP
  88 # ifdef OPENSSL_INIT_DEBUG
  89     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
  90             "SSL_COMP_get_compression_methods()\n");
  91 # endif
  92     /*
  93      * This will initialise the built-in compression algorithms. The value
  94      * returned is a STACK_OF(SSL_COMP), but that can be discarded safely
  95      */
  96     SSL_COMP_get_compression_methods();
  97 #endif
  98     /* initialize cipher/digest methods table */
  99     ssl_load_ciphers();
 100
 101 #ifdef OPENSSL_INIT_DEBUG
 102     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
 103             "SSL_add_ssl_module()\n");
 104 #endif
 105     SSL_add_ssl_module();
 106     /*
 107      * We ignore an error return here. Not much we can do - but not that bad
 108      * either. We can still safely continue.
 109      */
 110     OPENSSL_atexit(ssl_library_stop);
 111     ssl_base_inited = 1;
 112     return 1;
 113 }
 114
 115 static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
 116 static int ssl_strings_inited = 0;
 117 DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)
 118 {
 119     /*
 120      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 121      * pulling in all the error strings during static linking
 122      */
 123 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 124 # ifdef OPENSSL_INIT_DEBUG
 125     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_ssl_strings: "
 126             "ERR_load_SSL_strings()\n");
 127 # endif
 128     ERR_load_SSL_strings();
 129 #endif
 130     ssl_strings_inited = 1;
 131     return 1;
 132 }
 133
 134 DEFINE_RUN_ONCE_STATIC(ossl_init_no_load_ssl_strings)
 135 {
 136     /* Do nothing in this case */
 137     return 1;
 138 }
 139
 140 static void ssl_library_stop(void)
 141 {
 142     /* Might be explicitly called and also by atexit */
 143     if (stopped)
 144         return;
 145     stopped = 1;
 146
 147     if (ssl_base_inited) {
 148 #ifndef OPENSSL_NO_COMP
 149 # ifdef OPENSSL_INIT_DEBUG
 150         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 151                 "ssl_comp_free_compression_methods_int()\n");
 152 # endif
 153         ssl_comp_free_compression_methods_int();
 154 #endif
 155     }
 156
 157     if (ssl_strings_inited) {
 158 #ifdef OPENSSL_INIT_DEBUG
 159         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 160                 "err_free_strings_int()\n");
 161 #endif
 162         /*
 163          * If both crypto and ssl error strings are inited we will end up
 164          * calling err_free_strings_int() twice - but that's ok. The second
 165          * time will be a no-op. It's easier to do that than to try and track
 166          * between the two libraries whether they have both been inited.
 167          */
 168         err_free_strings_int();
 169     }
 170 }
 171
 172 /*
 173  * If this function is called with a non NULL settings value then it must be
 174  * called prior to any threads making calls to any OpenSSL functions,
 175  * i.e. passing a non-null settings value is assumed to be single-threaded.
 176  */
 177 int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS * settings)
 178 {
 179     static int stoperrset = 0;
 180
 181     if (stopped) {
 182         if (!stoperrset) {
 183             /*
 184              * We only ever set this once to avoid getting into an infinite
 185              * loop where the error system keeps trying to init and fails so
 186              * sets an error etc
 187              */
 188             stoperrset = 1;
 189             SSLerr(SSL_F_OPENSSL_INIT_SSL, ERR_R_INIT_FAIL);
 190         }
 191         return 0;
 192     }
 193
 194     if (!OPENSSL_init_crypto(opts | OPENSSL_INIT_ADD_ALL_CIPHERS
 195                              | OPENSSL_INIT_ADD_ALL_DIGESTS, settings))
 196         return 0;
 197
 198     if (!RUN_ONCE(&ssl_base, ossl_init_ssl_base))
 199         return 0;
 200
 201     if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
 202         && !RUN_ONCE(&ssl_strings, ossl_init_no_load_ssl_strings))
 203         return 0;
 204
 205     if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
 206         && !RUN_ONCE(&ssl_strings, ossl_init_load_ssl_strings))
 207         return 0;
 208
 209     return 1;
 210 }