crypto/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 <internal/threads.h>
  59 #include <internal/cryptlib_int.h>
  60 #include <openssl/err.h>
  61 #include <openssl/rand.h>
  62 #include <openssl/evp.h>
  63 #include <internal/evp_int.h>
  64 #include <internal/conf.h>
  65 #include <internal/async.h>
  66 #include <internal/engine.h>
  67 #include <openssl/comp.h>
  68 #include <internal/err.h>
  69 #include <stdlib.h>
  70 #include <assert.h>
  71
  72 static int stopped = 0;
  73
  74 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
  75
  76 static CRYPTO_THREAD_LOCAL threadstopkey;
  77
  78 static void ossl_init_thread_stop_wrap(void *local)
  79 {
  80     ossl_init_thread_stop((struct thread_local_inits_st *)local);
  81 }
  82
  83 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
  84 {
  85     struct thread_local_inits_st *local =
  86         CRYPTO_THREAD_get_local(&threadstopkey);
  87
  88     if (local == NULL && alloc) {
  89         local = OPENSSL_zalloc(sizeof *local);
  90         CRYPTO_THREAD_set_local(&threadstopkey, local);
  91     }
  92     if (!alloc) {
  93         CRYPTO_THREAD_set_local(&threadstopkey, NULL);
  94     }
  95
  96     return local;
  97 }
  98
  99 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
 100 struct ossl_init_stop_st {
 101     void (*handler)(void);
 102     OPENSSL_INIT_STOP *next;
 103 };
 104
 105 static OPENSSL_INIT_STOP *stop_handlers = NULL;
 106 static CRYPTO_RWLOCK *init_lock = NULL;
 107
 108 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
 109 static int base_inited = 0;
 110 static void ossl_init_base(void)
 111 {
 112 #ifdef OPENSSL_INIT_DEBUG
 113     fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
 114 #endif
 115     /*
 116      * We use a dummy thread local key here. We use the destructor to detect
 117      * when the thread is going to stop (where that feature is available)
 118      */
 119     CRYPTO_THREAD_init_local(&threadstopkey, ossl_init_thread_stop_wrap);
 120 #ifndef OPENSSL_SYS_UEFI
 121     atexit(OPENSSL_cleanup);
 122 #endif
 123     init_lock = CRYPTO_THREAD_lock_new();
 124     OPENSSL_cpuid_setup();
 125     base_inited = 1;
 126 }
 127
 128 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
 129 static int load_crypto_strings_inited = 0;
 130 static void ossl_init_no_load_crypto_strings(void)
 131 {
 132     /* Do nothing in this case */
 133     return;
 134 }
 135
 136 static void ossl_init_load_crypto_strings(void)
 137 {
 138     /*
 139      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 140      * pulling in all the error strings during static linking
 141      */
 142 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 143 # ifdef OPENSSL_INIT_DEBUG
 144     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
 145                     "err_load_crypto_strings_intern()\n");
 146 # endif
 147     err_load_crypto_strings_intern();
 148 #endif
 149     load_crypto_strings_inited = 1;
 150 }
 151
 152 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
 153 static void ossl_init_add_all_ciphers(void)
 154 {
 155     /*
 156      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 157      * pulling in all the ciphers during static linking
 158      */
 159 #ifndef OPENSSL_NO_AUTOALGINIT
 160 # ifdef OPENSSL_INIT_DEBUG
 161     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
 162                     "openssl_add_all_ciphers_internal()\n");
 163 # endif
 164     openssl_add_all_ciphers_internal();
 165 # ifndef OPENSSL_NO_ENGINE
 166 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 167     ENGINE_setup_bsd_cryptodev();
 168 #  endif
 169 # endif
 170 #endif
 171 }
 172
 173 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
 174 static void ossl_init_add_all_digests(void)
 175 {
 176     /*
 177      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 178      * pulling in all the ciphers during static linking
 179      */
 180 #ifndef OPENSSL_NO_AUTOALGINIT
 181 # ifdef OPENSSL_INIT_DEBUG
 182     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
 183                     "openssl_add_all_digests_internal()\n");
 184 # endif
 185     openssl_add_all_digests_internal();
 186 # ifndef OPENSSL_NO_ENGINE
 187 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 188     ENGINE_setup_bsd_cryptodev();
 189 #  endif
 190 # endif
 191 #endif
 192 }
 193
 194 static void ossl_init_no_add_algs(void)
 195 {
 196     /* Do nothing */
 197     return;
 198 }
 199
 200 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
 201 static int config_inited = 0;
 202 static const char *config_filename;
 203 static void ossl_init_config(void)
 204 {
 205 #ifdef OPENSSL_INIT_DEBUG
 206     fprintf(stderr,
 207             "OPENSSL_INIT: ossl_init_config: openssl_config_internal(%s)\n",
 208             config_filename==NULL?"NULL":config_filename);
 209 #endif
 210     openssl_config_internal(config_filename);
 211     config_inited = 1;
 212 }
 213 static void ossl_init_no_config(void)
 214 {
 215 #ifdef OPENSSL_INIT_DEBUG
 216     fprintf(stderr,
 217             "OPENSSL_INIT: ossl_init_config: openssl_no_config_internal()\n");
 218 #endif
 219     openssl_no_config_internal();
 220     config_inited = 1;
 221 }
 222
 223 #ifndef OPENSSL_NO_ASYNC
 224 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
 225 static int async_inited = 0;
 226 static void ossl_init_async(void)
 227 {
 228 #ifdef OPENSSL_INIT_DEBUG
 229     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
 230 #endif
 231     async_init();
 232     async_inited = 1;
 233 }
 234 #endif
 235
 236 #ifndef OPENSSL_NO_ENGINE
 237 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
 238 static void ossl_init_engine_openssl(void)
 239 {
 240 # ifdef OPENSSL_INIT_DEBUG
 241     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
 242                     "engine_load_openssl_internal()\n");
 243 # endif
 244     engine_load_openssl_internal();
 245 }
 246 # if !defined(OPENSSL_NO_HW) && \
 247     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 248 static CRYPTO_ONCE engine_cryptodev = CRYPTO_ONCE_STATIC_INIT;
 249 static void ossl_init_engine_cryptodev(void)
 250 {
 251 #  ifdef OPENSSL_INIT_DEBUG
 252     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_cryptodev: "
 253                     "engine_load_cryptodev_internal()\n");
 254 #  endif
 255     engine_load_cryptodev_internal();
 256 }
 257 # endif
 258
 259 # ifndef OPENSSL_NO_RDRAND
 260 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
 261 static void ossl_init_engine_rdrand(void)
 262 {
 263 #  ifdef OPENSSL_INIT_DEBUG
 264     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
 265                     "engine_load_rdrand_internal()\n");
 266 #  endif
 267     engine_load_rdrand_internal();
 268 }
 269 # endif
 270 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
 271 static void ossl_init_engine_dynamic(void)
 272 {
 273 # ifdef OPENSSL_INIT_DEBUG
 274     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
 275                     "engine_load_dynamic_internal()\n");
 276 # endif
 277     engine_load_dynamic_internal();
 278 }
 279 # ifndef OPENSSL_NO_STATIC_ENGINE
 280 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 281 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
 282 static void ossl_init_engine_padlock(void)
 283 {
 284 #   ifdef OPENSSL_INIT_DEBUG
 285     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
 286                     "engine_load_padlock_internal()\n");
 287 #   endif
 288     engine_load_padlock_internal();
 289 }
 290 #  endif
 291 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 292 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
 293 static void ossl_init_engine_capi(void)
 294 {
 295 #   ifdef OPENSSL_INIT_DEBUG
 296     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
 297                     "engine_load_capi_internal()\n");
 298 #   endif
 299     engine_load_capi_internal();
 300 }
 301 #  endif
 302 static CRYPTO_ONCE engine_dasync = CRYPTO_ONCE_STATIC_INIT;
 303 static void ossl_init_engine_dasync(void)
 304 {
 305 # ifdef OPENSSL_INIT_DEBUG
 306     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dasync: "
 307                     "engine_load_dasync_internal()\n");
 308 # endif
 309     engine_load_dasync_internal();
 310 }
 311 #  if !defined(OPENSSL_NO_AFALGENG)
 312 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
 313 static void ossl_init_engine_afalg(void)
 314 {
 315 #   ifdef OPENSSL_INIT_DEBUG
 316     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
 317                     "engine_load_afalg_internal()\n");
 318 #   endif
 319     engine_load_afalg_internal();
 320 }
 321 #  endif
 322 # endif
 323 #endif
 324
 325 #ifndef OPENSSL_NO_COMP
 326 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
 327
 328 static int zlib_inited = 0;
 329 static void ossl_init_zlib(void)
 330 {
 331     /* Do nothing - we need to know about this for the later cleanup */
 332     zlib_inited = 1;
 333 }
 334 #endif
 335
 336 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 337 {
 338     /* Can't do much about this */
 339     if (locals == NULL)
 340         return;
 341
 342 #ifndef OPENSSL_NO_ASYNC
 343     if (locals->async) {
 344 #ifdef OPENSSL_INIT_DEBUG
 345         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 346                         "ASYNC_cleanup_thread()\n");
 347 #endif
 348         ASYNC_cleanup_thread();
 349     }
 350 #endif
 351
 352     if (locals->err_state) {
 353 #ifdef OPENSSL_INIT_DEBUG
 354         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 355                         "ERR_remove_thread_state()\n");
 356 #endif
 357         ERR_remove_thread_state();
 358     }
 359
 360     OPENSSL_free(locals);
 361 }
 362
 363 void OPENSSL_thread_stop(void)
 364 {
 365     ossl_init_thread_stop(
 366         (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
 367 }
 368
 369 int ossl_init_thread_start(uint64_t opts)
 370 {
 371     struct thread_local_inits_st *locals = ossl_init_get_thread_local(1);
 372
 373     if (locals == NULL)
 374         return 0;
 375
 376     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
 377 #ifdef OPENSSL_INIT_DEBUG
 378         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 379                         "marking thread for async\n");
 380 #endif
 381         locals->async = 1;
 382     }
 383
 384     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
 385 #ifdef OPENSSL_INIT_DEBUG
 386         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 387                         "marking thread for err_state\n");
 388 #endif
 389         locals->err_state = 1;
 390     }
 391
 392     return 1;
 393 }
 394
 395 void OPENSSL_cleanup(void)
 396 {
 397     OPENSSL_INIT_STOP *currhandler, *lasthandler;
 398
 399     /* If we've not been inited then no need to deinit */
 400     if (!base_inited)
 401         return;
 402
 403     /* Might be explicitly called and also by atexit */
 404     if (stopped)
 405         return;
 406     stopped = 1;
 407
 408     /*
 409      * Thread stop may not get automatically called by the thread library for
 410      * the very last thread in some situations, so call it directly.
 411      */
 412     ossl_init_thread_stop(ossl_init_get_thread_local(0));
 413
 414     currhandler = stop_handlers;
 415     while (currhandler != NULL) {
 416         currhandler->handler();
 417         lasthandler = currhandler;
 418         currhandler = currhandler->next;
 419         OPENSSL_free(lasthandler);
 420     }
 421     stop_handlers = NULL;
 422
 423     CRYPTO_THREAD_lock_free(init_lock);
 424
 425     /*
 426      * We assume we are single-threaded for this function, i.e. no race
 427      * conditions for the various "*_inited" vars below.
 428      */
 429
 430 #ifndef OPENSSL_NO_COMP
 431     if (zlib_inited) {
 432 #ifdef OPENSSL_INIT_DEBUG
 433         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 434                         "COMP_zlib_cleanup()\n");
 435 #endif
 436         COMP_zlib_cleanup();
 437     }
 438 #endif
 439
 440 #ifndef OPENSSL_NO_ASYNC
 441     if (async_inited) {
 442 # ifdef OPENSSL_INIT_DEBUG
 443         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 444                         "async_deinit()\n");
 445 # endif
 446         async_deinit();
 447     }
 448 #endif
 449
 450     if (load_crypto_strings_inited) {
 451 #ifdef OPENSSL_INIT_DEBUG
 452         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 453                         "ERR_free_strings()\n");
 454 #endif
 455         ERR_free_strings();
 456     }
 457
 458     CRYPTO_THREAD_cleanup_local(&threadstopkey);
 459
 460 #ifdef OPENSSL_INIT_DEBUG
 461     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 462                     "RAND_cleanup()\n");
 463     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 464                     "CONF_modules_free()\n");
 465 #ifndef OPENSSL_NO_ENGINE
 466     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 467                     "ENGINE_cleanup()\n");
 468 #endif
 469     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 470                     "CRYPTO_cleanup_all_ex_data()\n");
 471     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 472                     "BIO_sock_cleanup()\n");
 473     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 474                     "EVP_cleanup()\n");
 475     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 476                     "OBJ_cleanup()\n");
 477 #endif
 478     /*
 479      * Note that cleanup order is important:
 480      * - RAND_cleanup could call an ENINGE's RAND cleanup function so must be
 481      * called before ENGINE_cleanup()
 482      * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
 483      * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
 484      * - CONF_modules_free() can end up in ENGINE code so must be called before
 485      * ENGINE_cleanup()
 486      */
 487     RAND_cleanup();
 488     CONF_modules_free();
 489 #ifndef OPENSSL_NO_ENGINE
 490     ENGINE_cleanup();
 491 #endif
 492     CRYPTO_cleanup_all_ex_data();
 493     BIO_sock_cleanup();
 494     EVP_cleanup();
 495     OBJ_cleanup();
 496     base_inited = 0;
 497 }
 498
 499 /*
 500  * If this function is called with a non NULL settings value then it must be
 501  * called prior to any threads making calls to any OpenSSL functions,
 502  * i.e. passing a non-null settings value is assumed to be single-threaded.
 503  */
 504 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 505 {
 506     static int stoperrset = 0;
 507
 508     if (stopped) {
 509         if (!stoperrset) {
 510             /*
 511              * We only ever set this once to avoid getting into an infinite
 512              * loop where the error system keeps trying to init and fails so
 513              * sets an error etc
 514              */
 515             stoperrset = 1;
 516             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
 517         }
 518         return 0;
 519     }
 520
 521     if (!CRYPTO_THREAD_run_once(&base, ossl_init_base))
 522         return 0;
 523
 524     if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
 525             && !CRYPTO_THREAD_run_once(&load_crypto_strings,
 526                                        ossl_init_no_load_crypto_strings))
 527         return 0;
 528
 529     if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
 530             && !CRYPTO_THREAD_run_once(&load_crypto_strings,
 531                                        ossl_init_load_crypto_strings))
 532         return 0;
 533
 534     if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
 535             && !CRYPTO_THREAD_run_once(&add_all_ciphers, ossl_init_no_add_algs))
 536         return 0;
 537
 538     if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
 539             && !CRYPTO_THREAD_run_once(&add_all_ciphers,
 540                                        ossl_init_add_all_ciphers))
 541         return 0;
 542
 543     if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
 544             && !CRYPTO_THREAD_run_once(&add_all_digests, ossl_init_no_add_algs))
 545         return 0;
 546
 547     if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
 548             && !CRYPTO_THREAD_run_once(&add_all_digests,
 549                                        ossl_init_add_all_digests))
 550         return 0;
 551
 552     if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
 553             && !CRYPTO_THREAD_run_once(&config, ossl_init_no_config))
 554         return 0;
 555
 556     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
 557         int ret;
 558         CRYPTO_THREAD_write_lock(init_lock);
 559         config_filename = (settings == NULL) ? NULL : settings->config_name;
 560         ret = CRYPTO_THREAD_run_once(&config, ossl_init_config);
 561         CRYPTO_THREAD_unlock(init_lock);
 562         if (!ret)
 563             return 0;
 564     }
 565
 566 #ifndef OPENSSL_NO_ASYNC
 567     if ((opts & OPENSSL_INIT_ASYNC)
 568             && !CRYPTO_THREAD_run_once(&async, ossl_init_async))
 569         return 0;
 570 #endif
 571 #ifndef OPENSSL_NO_ENGINE
 572     if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
 573             && !CRYPTO_THREAD_run_once(&engine_openssl,
 574                                        ossl_init_engine_openssl))
 575         return 0;
 576 # if !defined(OPENSSL_NO_HW) && \
 577     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 578     if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
 579             && !CRYPTO_THREAD_run_once(&engine_cryptodev,
 580                                        ossl_init_engine_cryptodev))
 581         return 0;
 582 # endif
 583 # ifndef OPENSSL_NO_RDRAND
 584     if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
 585             && !CRYPTO_THREAD_run_once(&engine_rdrand, ossl_init_engine_rdrand))
 586         return 0;
 587 # endif
 588     if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
 589             && !CRYPTO_THREAD_run_once(&engine_dynamic,
 590                                        ossl_init_engine_dynamic))
 591         return 0;
 592 # ifndef OPENSSL_NO_STATIC_ENGINE
 593 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 594     if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
 595             && !CRYPTO_THREAD_run_once(&engine_padlock,
 596                                        ossl_init_engine_padlock))
 597         return 0;
 598 #  endif
 599 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 600     if ((opts & OPENSSL_INIT_ENGINE_CAPI)
 601             && !CRYPTO_THREAD_run_once(&engine_capi, ossl_init_engine_capi))
 602         return 0;
 603 #  endif
 604     if ((opts & OPENSSL_INIT_ENGINE_DASYNC)
 605             && !CRYPTO_THREAD_run_once(&engine_dasync, ossl_init_engine_dasync))
 606         return 0;
 607 #  if !defined(OPENSSL_NO_AFALGENG)
 608     if ((opts & OPENSSL_INIT_ENGINE_AFALG)
 609             && !CRYPTO_THREAD_run_once(&engine_afalg, ossl_init_engine_afalg))
 610         return 0;
 611 #  endif
 612 # endif
 613     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
 614                 | OPENSSL_INIT_ENGINE_DASYNC | OPENSSL_INIT_ENGINE_OPENSSL
 615                 | OPENSSL_INIT_ENGINE_AFALG)) {
 616         ENGINE_register_all_complete();
 617     }
 618 #endif
 619
 620 #ifndef OPENSSL_NO_COMP
 621     if ((opts & OPENSSL_INIT_ZLIB)
 622             && !CRYPTO_THREAD_run_once(&zlib, ossl_init_zlib))
 623         return 0;
 624 #endif
 625
 626     return 1;
 627 }
 628
 629 int OPENSSL_atexit(void (*handler)(void))
 630 {
 631     OPENSSL_INIT_STOP *newhand;
 632
 633     newhand = OPENSSL_malloc(sizeof(*newhand));
 634     if (newhand == NULL)
 635         return 0;
 636
 637     newhand->handler = handler;
 638     newhand->next = stop_handlers;
 639     stop_handlers = newhand;
 640
 641     return 1;
 642 }