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 #ifndef OPENSSL_NO_ENGINE
  67 #include <internal/engine.h>
  68 #endif
  69 #include <openssl/comp.h>
  70 #include <internal/err.h>
  71 #include <stdlib.h>
  72 #include <assert.h>
  73
  74 static int stopped = 0;
  75
  76 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
  77
  78 static CRYPTO_THREAD_LOCAL threadstopkey;
  79
  80 static void ossl_init_thread_stop_wrap(void *local)
  81 {
  82     ossl_init_thread_stop((struct thread_local_inits_st *)local);
  83 }
  84
  85 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
  86 {
  87     struct thread_local_inits_st *local =
  88         CRYPTO_THREAD_get_local(&threadstopkey);
  89
  90     if (local == NULL && alloc) {
  91         local = OPENSSL_zalloc(sizeof *local);
  92         CRYPTO_THREAD_set_local(&threadstopkey, local);
  93     }
  94     if (!alloc) {
  95         CRYPTO_THREAD_set_local(&threadstopkey, NULL);
  96     }
  97
  98     return local;
  99 }
 100
 101 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
 102 struct ossl_init_stop_st {
 103     void (*handler)(void);
 104     OPENSSL_INIT_STOP *next;
 105 };
 106
 107 static OPENSSL_INIT_STOP *stop_handlers = NULL;
 108 static CRYPTO_RWLOCK *init_lock = NULL;
 109
 110 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
 111 static int base_inited = 0;
 112 static void ossl_init_base(void)
 113 {
 114 #ifdef OPENSSL_INIT_DEBUG
 115     fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
 116 #endif
 117     /*
 118      * We use a dummy thread local key here. We use the destructor to detect
 119      * when the thread is going to stop (where that feature is available)
 120      */
 121     CRYPTO_THREAD_init_local(&threadstopkey, ossl_init_thread_stop_wrap);
 122 #ifndef OPENSSL_SYS_UEFI
 123     atexit(OPENSSL_cleanup);
 124 #endif
 125     init_lock = CRYPTO_THREAD_lock_new();
 126     OPENSSL_cpuid_setup();
 127     base_inited = 1;
 128 }
 129
 130 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
 131 static int load_crypto_strings_inited = 0;
 132 static void ossl_init_no_load_crypto_strings(void)
 133 {
 134     /* Do nothing in this case */
 135     return;
 136 }
 137
 138 static void ossl_init_load_crypto_strings(void)
 139 {
 140     /*
 141      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 142      * pulling in all the error strings during static linking
 143      */
 144 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 145 # ifdef OPENSSL_INIT_DEBUG
 146     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
 147                     "err_load_crypto_strings_intern()\n");
 148 # endif
 149     err_load_crypto_strings_intern();
 150 #endif
 151     load_crypto_strings_inited = 1;
 152 }
 153
 154 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
 155 static void ossl_init_add_all_ciphers(void)
 156 {
 157     /*
 158      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 159      * pulling in all the ciphers during static linking
 160      */
 161 #ifndef OPENSSL_NO_AUTOALGINIT
 162 # ifdef OPENSSL_INIT_DEBUG
 163     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
 164                     "openssl_add_all_ciphers_internal()\n");
 165 # endif
 166     openssl_add_all_ciphers_internal();
 167 # ifndef OPENSSL_NO_ENGINE
 168 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 169     ENGINE_setup_bsd_cryptodev();
 170 #  endif
 171 # endif
 172 #endif
 173 }
 174
 175 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
 176 static void ossl_init_add_all_digests(void)
 177 {
 178     /*
 179      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 180      * pulling in all the ciphers during static linking
 181      */
 182 #ifndef OPENSSL_NO_AUTOALGINIT
 183 # ifdef OPENSSL_INIT_DEBUG
 184     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
 185                     "openssl_add_all_digests_internal()\n");
 186 # endif
 187     openssl_add_all_digests_internal();
 188 # ifndef OPENSSL_NO_ENGINE
 189 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 190     ENGINE_setup_bsd_cryptodev();
 191 #  endif
 192 # endif
 193 #endif
 194 }
 195
 196 static void ossl_init_no_add_algs(void)
 197 {
 198     /* Do nothing */
 199     return;
 200 }
 201
 202 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
 203 static int config_inited = 0;
 204 static const char *config_filename;
 205 static void ossl_init_config(void)
 206 {
 207 #ifdef OPENSSL_INIT_DEBUG
 208     fprintf(stderr,
 209             "OPENSSL_INIT: ossl_init_config: openssl_config_internal(%s)\n",
 210             config_filename==NULL?"NULL":config_filename);
 211 #endif
 212     openssl_config_internal(config_filename);
 213     config_inited = 1;
 214 }
 215 static void ossl_init_no_config(void)
 216 {
 217 #ifdef OPENSSL_INIT_DEBUG
 218     fprintf(stderr,
 219             "OPENSSL_INIT: ossl_init_config: openssl_no_config_internal()\n");
 220 #endif
 221     openssl_no_config_internal();
 222     config_inited = 1;
 223 }
 224
 225 #ifndef OPENSSL_NO_ASYNC
 226 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
 227 static int async_inited = 0;
 228 static void ossl_init_async(void)
 229 {
 230 #ifdef OPENSSL_INIT_DEBUG
 231     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
 232 #endif
 233     async_init();
 234     async_inited = 1;
 235 }
 236 #endif
 237
 238 #ifndef OPENSSL_NO_ENGINE
 239 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
 240 static void ossl_init_engine_openssl(void)
 241 {
 242 # ifdef OPENSSL_INIT_DEBUG
 243     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
 244                     "engine_load_openssl_internal()\n");
 245 # endif
 246     engine_load_openssl_internal();
 247 }
 248 # if !defined(OPENSSL_NO_HW) && \
 249     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 250 static CRYPTO_ONCE engine_cryptodev = CRYPTO_ONCE_STATIC_INIT;
 251 static void ossl_init_engine_cryptodev(void)
 252 {
 253 #  ifdef OPENSSL_INIT_DEBUG
 254     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_cryptodev: "
 255                     "engine_load_cryptodev_internal()\n");
 256 #  endif
 257     engine_load_cryptodev_internal();
 258 }
 259 # endif
 260
 261 # ifndef OPENSSL_NO_RDRAND
 262 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
 263 static void ossl_init_engine_rdrand(void)
 264 {
 265 #  ifdef OPENSSL_INIT_DEBUG
 266     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
 267                     "engine_load_rdrand_internal()\n");
 268 #  endif
 269     engine_load_rdrand_internal();
 270 }
 271 # endif
 272 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
 273 static void ossl_init_engine_dynamic(void)
 274 {
 275 # ifdef OPENSSL_INIT_DEBUG
 276     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
 277                     "engine_load_dynamic_internal()\n");
 278 # endif
 279     engine_load_dynamic_internal();
 280 }
 281 # ifndef OPENSSL_NO_STATIC_ENGINE
 282 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 283 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
 284 static void ossl_init_engine_padlock(void)
 285 {
 286 #   ifdef OPENSSL_INIT_DEBUG
 287     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
 288                     "engine_load_padlock_internal()\n");
 289 #   endif
 290     engine_load_padlock_internal();
 291 }
 292 #  endif
 293 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 294 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
 295 static void ossl_init_engine_capi(void)
 296 {
 297 #   ifdef OPENSSL_INIT_DEBUG
 298     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
 299                     "engine_load_capi_internal()\n");
 300 #   endif
 301     engine_load_capi_internal();
 302 }
 303 #  endif
 304 static CRYPTO_ONCE engine_dasync = CRYPTO_ONCE_STATIC_INIT;
 305 static void ossl_init_engine_dasync(void)
 306 {
 307 # ifdef OPENSSL_INIT_DEBUG
 308     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dasync: "
 309                     "engine_load_dasync_internal()\n");
 310 # endif
 311     engine_load_dasync_internal();
 312 }
 313 #  if !defined(OPENSSL_NO_AFALGENG)
 314 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
 315 static void ossl_init_engine_afalg(void)
 316 {
 317 #   ifdef OPENSSL_INIT_DEBUG
 318     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
 319                     "engine_load_afalg_internal()\n");
 320 #   endif
 321     engine_load_afalg_internal();
 322 }
 323 #  endif
 324 # endif
 325 #endif
 326
 327 #ifndef OPENSSL_NO_COMP
 328 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
 329
 330 static int zlib_inited = 0;
 331 static void ossl_init_zlib(void)
 332 {
 333     /* Do nothing - we need to know about this for the later cleanup */
 334     zlib_inited = 1;
 335 }
 336 #endif
 337
 338 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 339 {
 340     /* Can't do much about this */
 341     if (locals == NULL)
 342         return;
 343
 344 #ifndef OPENSSL_NO_ASYNC
 345     if (locals->async) {
 346 #ifdef OPENSSL_INIT_DEBUG
 347         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 348                         "ASYNC_cleanup_thread()\n");
 349 #endif
 350         ASYNC_cleanup_thread();
 351     }
 352 #endif
 353
 354     if (locals->err_state) {
 355 #ifdef OPENSSL_INIT_DEBUG
 356         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 357                         "ERR_remove_thread_state()\n");
 358 #endif
 359         ERR_remove_thread_state();
 360     }
 361
 362     OPENSSL_free(locals);
 363 }
 364
 365 void OPENSSL_thread_stop(void)
 366 {
 367     ossl_init_thread_stop(
 368         (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
 369 }
 370
 371 int ossl_init_thread_start(uint64_t opts)
 372 {
 373     struct thread_local_inits_st *locals = ossl_init_get_thread_local(1);
 374
 375     if (locals == NULL)
 376         return 0;
 377
 378     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
 379 #ifdef OPENSSL_INIT_DEBUG
 380         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 381                         "marking thread for async\n");
 382 #endif
 383         locals->async = 1;
 384     }
 385
 386     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
 387 #ifdef OPENSSL_INIT_DEBUG
 388         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 389                         "marking thread for err_state\n");
 390 #endif
 391         locals->err_state = 1;
 392     }
 393
 394     return 1;
 395 }
 396
 397 void OPENSSL_cleanup(void)
 398 {
 399     OPENSSL_INIT_STOP *currhandler, *lasthandler;
 400
 401     /* If we've not been inited then no need to deinit */
 402     if (!base_inited)
 403         return;
 404
 405     /* Might be explicitly called and also by atexit */
 406     if (stopped)
 407         return;
 408     stopped = 1;
 409
 410     /*
 411      * Thread stop may not get automatically called by the thread library for
 412      * the very last thread in some situations, so call it directly.
 413      */
 414     ossl_init_thread_stop(ossl_init_get_thread_local(0));
 415
 416     currhandler = stop_handlers;
 417     while (currhandler != NULL) {
 418         currhandler->handler();
 419         lasthandler = currhandler;
 420         currhandler = currhandler->next;
 421         OPENSSL_free(lasthandler);
 422     }
 423     stop_handlers = NULL;
 424
 425     CRYPTO_THREAD_lock_free(init_lock);
 426
 427     /*
 428      * We assume we are single-threaded for this function, i.e. no race
 429      * conditions for the various "*_inited" vars below.
 430      */
 431
 432 #ifndef OPENSSL_NO_COMP
 433     if (zlib_inited) {
 434 #ifdef OPENSSL_INIT_DEBUG
 435         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 436                         "COMP_zlib_cleanup()\n");
 437 #endif
 438         COMP_zlib_cleanup();
 439     }
 440 #endif
 441
 442 #ifndef OPENSSL_NO_ASYNC
 443     if (async_inited) {
 444 # ifdef OPENSSL_INIT_DEBUG
 445         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 446                         "async_deinit()\n");
 447 # endif
 448         async_deinit();
 449     }
 450 #endif
 451
 452     if (load_crypto_strings_inited) {
 453 #ifdef OPENSSL_INIT_DEBUG
 454         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 455                         "ERR_free_strings()\n");
 456 #endif
 457         ERR_free_strings();
 458     }
 459
 460     CRYPTO_THREAD_cleanup_local(&threadstopkey);
 461
 462 #ifdef OPENSSL_INIT_DEBUG
 463     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 464                     "RAND_cleanup()\n");
 465     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 466                     "CONF_modules_free()\n");
 467 #ifndef OPENSSL_NO_ENGINE
 468     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 469                     "ENGINE_cleanup()\n");
 470 #endif
 471     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 472                     "CRYPTO_cleanup_all_ex_data()\n");
 473     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 474                     "BIO_sock_cleanup()\n");
 475     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 476                     "EVP_cleanup()\n");
 477     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 478                     "OBJ_cleanup()\n");
 479 #endif
 480     /*
 481      * Note that cleanup order is important:
 482      * - RAND_cleanup could call an ENINGE's RAND cleanup function so must be
 483      * called before ENGINE_cleanup()
 484      * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
 485      * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
 486      * - CONF_modules_free() can end up in ENGINE code so must be called before
 487      * ENGINE_cleanup()
 488      */
 489     RAND_cleanup();
 490     CONF_modules_free();
 491 #ifndef OPENSSL_NO_ENGINE
 492     ENGINE_cleanup();
 493 #endif
 494     CRYPTO_cleanup_all_ex_data();
 495     BIO_sock_cleanup();
 496     EVP_cleanup();
 497     OBJ_cleanup();
 498     base_inited = 0;
 499 }
 500
 501 /*
 502  * If this function is called with a non NULL settings value then it must be
 503  * called prior to any threads making calls to any OpenSSL functions,
 504  * i.e. passing a non-null settings value is assumed to be single-threaded.
 505  */
 506 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 507 {
 508     static int stoperrset = 0;
 509
 510     if (stopped) {
 511         if (!stoperrset) {
 512             /*
 513              * We only ever set this once to avoid getting into an infinite
 514              * loop where the error system keeps trying to init and fails so
 515              * sets an error etc
 516              */
 517             stoperrset = 1;
 518             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
 519         }
 520         return 0;
 521     }
 522
 523     if (!CRYPTO_THREAD_run_once(&base, ossl_init_base))
 524         return 0;
 525
 526     if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
 527             && !CRYPTO_THREAD_run_once(&load_crypto_strings,
 528                                        ossl_init_no_load_crypto_strings))
 529         return 0;
 530
 531     if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
 532             && !CRYPTO_THREAD_run_once(&load_crypto_strings,
 533                                        ossl_init_load_crypto_strings))
 534         return 0;
 535
 536     if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
 537             && !CRYPTO_THREAD_run_once(&add_all_ciphers, ossl_init_no_add_algs))
 538         return 0;
 539
 540     if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
 541             && !CRYPTO_THREAD_run_once(&add_all_ciphers,
 542                                        ossl_init_add_all_ciphers))
 543         return 0;
 544
 545     if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
 546             && !CRYPTO_THREAD_run_once(&add_all_digests, ossl_init_no_add_algs))
 547         return 0;
 548
 549     if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
 550             && !CRYPTO_THREAD_run_once(&add_all_digests,
 551                                        ossl_init_add_all_digests))
 552         return 0;
 553
 554     if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
 555             && !CRYPTO_THREAD_run_once(&config, ossl_init_no_config))
 556         return 0;
 557
 558     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
 559         int ret;
 560         CRYPTO_THREAD_write_lock(init_lock);
 561         config_filename = (settings == NULL) ? NULL : settings->config_name;
 562         ret = CRYPTO_THREAD_run_once(&config, ossl_init_config);
 563         CRYPTO_THREAD_unlock(init_lock);
 564         if (!ret)
 565             return 0;
 566     }
 567
 568 #ifndef OPENSSL_NO_ASYNC
 569     if ((opts & OPENSSL_INIT_ASYNC)
 570             && !CRYPTO_THREAD_run_once(&async, ossl_init_async))
 571         return 0;
 572 #endif
 573 #ifndef OPENSSL_NO_ENGINE
 574     if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
 575             && !CRYPTO_THREAD_run_once(&engine_openssl,
 576                                        ossl_init_engine_openssl))
 577         return 0;
 578 # if !defined(OPENSSL_NO_HW) && \
 579     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 580     if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
 581             && !CRYPTO_THREAD_run_once(&engine_cryptodev,
 582                                        ossl_init_engine_cryptodev))
 583         return 0;
 584 # endif
 585 # ifndef OPENSSL_NO_RDRAND
 586     if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
 587             && !CRYPTO_THREAD_run_once(&engine_rdrand, ossl_init_engine_rdrand))
 588         return 0;
 589 # endif
 590     if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
 591             && !CRYPTO_THREAD_run_once(&engine_dynamic,
 592                                        ossl_init_engine_dynamic))
 593         return 0;
 594 # ifndef OPENSSL_NO_STATIC_ENGINE
 595 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 596     if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
 597             && CRYPTO_THREAD_run_once(&engine_padlock,
 598                                       ossl_init_engine_padlock))
 599         return 0;
 600 #  endif
 601 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 602     if ((opts & OPENSSL_INIT_ENGINE_CAPI)
 603             && CRYPTO_THREAD_run_once(&engine_capi, ossl_init_engine_capi))
 604         return 0;
 605 #  endif
 606     if ((opts & OPENSSL_INIT_ENGINE_DASYNC)
 607             && !CRYPTO_THREAD_run_once(&engine_dasync, ossl_init_engine_dasync))
 608         return 0;
 609 #  if !defined(OPENSSL_NO_AFALGENG)
 610     if ((opts & OPENSSL_INIT_ENGINE_AFALG)
 611             && !CRYPTO_THREAD_run_once(&engine_afalg, ossl_init_engine_afalg))
 612         return 0;
 613 #  endif
 614 # endif
 615     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
 616                 | OPENSSL_INIT_ENGINE_DASYNC | OPENSSL_INIT_ENGINE_OPENSSL
 617                 | OPENSSL_INIT_ENGINE_AFALG)) {
 618         ENGINE_register_all_complete();
 619     }
 620 #endif
 621
 622 #ifndef OPENSSL_NO_COMP
 623     if ((opts & OPENSSL_INIT_ZLIB)
 624             && CRYPTO_THREAD_run_once(&zlib, ossl_init_zlib))
 625         return 0;
 626 #endif
 627
 628     return 1;
 629 }
 630
 631 int OPENSSL_atexit(void (*handler)(void))
 632 {
 633     OPENSSL_INIT_STOP *newhand;
 634
 635     newhand = OPENSSL_malloc(sizeof(*newhand));
 636     if (newhand == NULL)
 637         return 0;
 638
 639     newhand->handler = handler;
 640     newhand->next = stop_handlers;
 641     stop_handlers = newhand;
 642
 643     return 1;
 644 }