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 "ssl_locl.h"
  16 #include "internal/thread_once.h"
  17
  18 static int stopped;
  19
  20 static void ssl_library_stop(void);
  21
  22 static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
  23 static int ssl_base_inited = 0;
  24 DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)
  25 {
  26 #ifdef OPENSSL_INIT_DEBUG
  27     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
  28             "Adding SSL ciphers and digests\n");
  29 #endif
  30 #ifndef OPENSSL_NO_DES
  31     EVP_add_cipher(EVP_des_cbc());
  32     EVP_add_cipher(EVP_des_ede3_cbc());
  33 #endif
  34 #ifndef OPENSSL_NO_IDEA
  35     EVP_add_cipher(EVP_idea_cbc());
  36 #endif
  37 #ifndef OPENSSL_NO_RC4
  38     EVP_add_cipher(EVP_rc4());
  39 # ifndef OPENSSL_NO_MD5
  40     EVP_add_cipher(EVP_rc4_hmac_md5());
  41 # endif
  42 #endif
  43 #ifndef OPENSSL_NO_RC2
  44     EVP_add_cipher(EVP_rc2_cbc());
  45     /*
  46      * Not actually used for SSL/TLS but this makes PKCS#12 work if an
  47      * application only calls SSL_library_init().
  48      */
  49     EVP_add_cipher(EVP_rc2_40_cbc());
  50 #endif
  51     EVP_add_cipher(EVP_aes_128_cbc());
  52     EVP_add_cipher(EVP_aes_192_cbc());
  53     EVP_add_cipher(EVP_aes_256_cbc());
  54     EVP_add_cipher(EVP_aes_128_gcm());
  55     EVP_add_cipher(EVP_aes_256_gcm());
  56     EVP_add_cipher(EVP_aes_128_ccm());
  57     EVP_add_cipher(EVP_aes_256_ccm());
  58     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha1());
  59     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha1());
  60     EVP_add_cipher(EVP_aes_128_cbc_hmac_sha256());
  61     EVP_add_cipher(EVP_aes_256_cbc_hmac_sha256());
  62 #ifndef OPENSSL_NO_ARIA
  63     EVP_add_cipher(EVP_aria_128_gcm());
  64     EVP_add_cipher(EVP_aria_256_gcm());
  65 #endif
  66 #ifndef OPENSSL_NO_CAMELLIA
  67     EVP_add_cipher(EVP_camellia_128_cbc());
  68     EVP_add_cipher(EVP_camellia_256_cbc());
  69 #endif
  70 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
  71     EVP_add_cipher(EVP_chacha20_poly1305());
  72 #endif
  73
  74 #ifndef OPENSSL_NO_SEED
  75     EVP_add_cipher(EVP_seed_cbc());
  76 #endif
  77
  78 #ifndef OPENSSL_NO_MD5
  79     EVP_add_digest(EVP_md5());
  80     EVP_add_digest_alias(SN_md5, "ssl3-md5");
  81     EVP_add_digest(EVP_md5_sha1());
  82 #endif
  83     EVP_add_digest(EVP_sha1()); /* RSA with sha1 */
  84     EVP_add_digest_alias(SN_sha1, "ssl3-sha1");
  85     EVP_add_digest_alias(SN_sha1WithRSAEncryption, SN_sha1WithRSA);
  86     EVP_add_digest(EVP_sha224());
  87     EVP_add_digest(EVP_sha256());
  88     EVP_add_digest(EVP_sha384());
  89     EVP_add_digest(EVP_sha512());
  90 #ifndef OPENSSL_NO_COMP
  91 # ifdef OPENSSL_INIT_DEBUG
  92     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
  93             "SSL_COMP_get_compression_methods()\n");
  94 # endif
  95     /*
  96      * This will initialise the built-in compression algorithms. The value
  97      * returned is a STACK_OF(SSL_COMP), but that can be discarded safely
  98      */
  99     SSL_COMP_get_compression_methods();
 100 #endif
 101     /* initialize cipher/digest methods table */
 102     if (!ssl_load_ciphers())
 103         return 0;
 104
 105 #ifdef OPENSSL_INIT_DEBUG
 106     fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
 107             "SSL_add_ssl_module()\n");
 108 #endif
 109     SSL_add_ssl_module();
 110     /*
 111      * We ignore an error return here. Not much we can do - but not that bad
 112      * either. We can still safely continue.
 113      */
 114     OPENSSL_atexit(ssl_library_stop);
 115     ssl_base_inited = 1;
 116     return 1;
 117 }
 118
 119 static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
 120 static int ssl_strings_inited = 0;
 121 DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)
 122 {
 123     /*
 124      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 125      * pulling in all the error strings during static linking
 126      */
 127 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 128 # ifdef OPENSSL_INIT_DEBUG
 129     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_ssl_strings: "
 130             "ERR_load_SSL_strings()\n");
 131 # endif
 132     ERR_load_SSL_strings();
 133 #endif
 134     ssl_strings_inited = 1;
 135     return 1;
 136 }
 137
 138 DEFINE_RUN_ONCE_STATIC(ossl_init_no_load_ssl_strings)
 139 {
 140     /* Do nothing in this case */
 141     return 1;
 142 }
 143
 144 static void ssl_library_stop(void)
 145 {
 146     /* Might be explicitly called and also by atexit */
 147     if (stopped)
 148         return;
 149     stopped = 1;
 150
 151     if (ssl_base_inited) {
 152 #ifndef OPENSSL_NO_COMP
 153 # ifdef OPENSSL_INIT_DEBUG
 154         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 155                 "ssl_comp_free_compression_methods_int()\n");
 156 # endif
 157         ssl_comp_free_compression_methods_int();
 158 #endif
 159     }
 160
 161     if (ssl_strings_inited) {
 162 #ifdef OPENSSL_INIT_DEBUG
 163         fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
 164                 "err_free_strings_int()\n");
 165 #endif
 166         /*
 167          * If both crypto and ssl error strings are inited we will end up
 168          * calling err_free_strings_int() twice - but that's ok. The second
 169          * time will be a no-op. It's easier to do that than to try and track
 170          * between the two libraries whether they have both been inited.
 171          */
 172         err_free_strings_int();
 173     }
 174 }
 175
 176 /*
 177  * If this function is called with a non NULL settings value then it must be
 178  * called prior to any threads making calls to any OpenSSL functions,
 179  * i.e. passing a non-null settings value is assumed to be single-threaded.
 180  */
 181 int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS * settings)
 182 {
 183     static int stoperrset = 0;
 184
 185     if (stopped) {
 186         if (!stoperrset) {
 187             /*
 188              * We only ever set this once to avoid getting into an infinite
 189              * loop where the error system keeps trying to init and fails so
 190              * sets an error etc
 191              */
 192             stoperrset = 1;
 193             SSLerr(SSL_F_OPENSSL_INIT_SSL, ERR_R_INIT_FAIL);
 194         }
 195         return 0;
 196     }
 197
 198     if (!RUN_ONCE(&ssl_base, ossl_init_ssl_base))
 199         return 0;
 200
 201     if (!OPENSSL_init_crypto(opts | OPENSSL_INIT_ADD_ALL_CIPHERS
 202                              | OPENSSL_INIT_ADD_ALL_DIGESTS, settings))
 203         return 0;
 204
 205     if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
 206         && !RUN_ONCE(&ssl_strings, ossl_init_no_load_ssl_strings))
 207         return 0;
 208
 209     if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
 210         && !RUN_ONCE(&ssl_strings, ossl_init_load_ssl_strings))
 211         return 0;
 212
 213     return 1;
 214 }