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/cryptlib_int.h>
  59 #include <openssl/err.h>
  60 #include <openssl/rand.h>
  61 #include <openssl/evp.h>
  62 #include <internal/evp_int.h>
  63 #include <internal/conf.h>
  64 #include <internal/async.h>
  65 #include <internal/engine.h>
  66 #include <openssl/comp.h>
  67 #include <internal/err.h>
  68 #include <stdlib.h>
  69 #include <assert.h>
  70
  71 static int stopped = 0;
  72
  73 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
  74
  75 /* Implement "once" functionality */
  76 #if !defined(OPENSSL_THREADS)
  77 typedef int OPENSSL_INIT_ONCE;
  78 # define OPENSSL_INIT_ONCE_STATIC_INIT          0
  79
  80 static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
  81 {
  82     if (*once == OPENSSL_INIT_ONCE_STATIC_INIT) {
  83         *once = 1;
  84         init();
  85     }
  86 }
  87
  88 static int ossl_init_setup_thread_stop(void)
  89 {
  90     /*
  91      * There are no threads to stop. Do nothing.
  92      */
  93     return 1;
  94 }
  95
  96 static void ossl_init_thread_stop_cleanup(void)
  97 {
  98 }
  99
 100 static struct thread_local_inits_st *local = NULL;
 101 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
 102 {
 103     struct thread_local_inits_st *tmp;
 104
 105     tmp = local;
 106
 107     if (local == NULL && alloc)
 108         tmp = local = OPENSSL_zalloc(sizeof(*local));
 109
 110     if (!alloc)
 111         local = NULL;
 112
 113     return tmp;
 114 }
 115
 116 #elif defined(OPENSSL_SYS_WINDOWS)
 117
 118 # include <windows.h>
 119
 120 # if _WIN32_WINNT < 0x0600
 121
 122 /*
 123  * Versions before 0x0600 (Windows Vista, Windows Server 2008 or later) do not
 124  * have InitOnceExecuteOnce, so we fall back to using a spinlock instead.
 125  */
 126 typedef LONG OPENSSL_INIT_ONCE;
 127 #  define OPENSSL_INIT_ONCE_STATIC_INIT          0
 128
 129 #  define ONCE_UNINITED     0
 130 #  define ONCE_ININIT       1
 131 #  define ONCE_DONE         2
 132
 133 static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
 134 {
 135     LONG volatile *lock = (LONG *)once;
 136     LONG result;
 137
 138     if (*lock == ONCE_DONE)
 139         return;
 140
 141     do {
 142         result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
 143         if (result == ONCE_UNINITED) {
 144             init();
 145             *lock = ONCE_DONE;
 146             return;
 147         }
 148     } while (result == ONCE_ININIT);
 149 }
 150
 151 # else
 152
 153 typedef INIT_ONCE OPENSSL_INIT_ONCE;
 154 #  define OPENSSL_INIT_ONCE_STATIC_INIT          INIT_ONCE_STATIC_INIT
 155
 156 static BOOL CALLBACK once_cb(PINIT_ONCE once, PVOID initfp, PVOID *unused)
 157 {
 158     void (*init)(void) = initfp;
 159
 160     init();
 161
 162     return TRUE;
 163 }
 164
 165 static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
 166 {
 167     InitOnceExecuteOnce((INIT_ONCE *)once, once_cb, init, NULL);
 168 }
 169 # endif
 170
 171 static DWORD threadstopkey = TLS_OUT_OF_INDEXES;
 172
 173 static int ossl_init_setup_thread_stop(void)
 174 {
 175     /*
 176      * We use a dummy thread local key here. We use the destructor to detect
 177      * when the thread is going to stop
 178      */
 179     threadstopkey = TlsAlloc();
 180     if (threadstopkey == TLS_OUT_OF_INDEXES)
 181         return 0;
 182
 183     return 1;
 184 }
 185
 186 static void ossl_init_thread_stop_cleanup(void)
 187 {
 188     if (threadstopkey != TLS_OUT_OF_INDEXES) {
 189         TlsFree(threadstopkey);
 190     }
 191 }
 192
 193 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
 194 {
 195     struct thread_local_inits_st *local = TlsGetValue(threadstopkey);
 196
 197     if (local == NULL && alloc) {
 198         local = OPENSSL_zalloc(sizeof *local);
 199         TlsSetValue(threadstopkey, local);
 200     }
 201     if (!alloc) {
 202         TlsSetValue(threadstopkey, NULL);
 203     }
 204
 205     return local;
 206 }
 207
 208 #else /* pthreads */
 209 # include <pthread.h>
 210
 211 static pthread_key_t threadstopkey;
 212
 213 typedef pthread_once_t OPENSSL_INIT_ONCE;
 214 # define OPENSSL_INIT_ONCE_STATIC_INIT          PTHREAD_ONCE_INIT
 215
 216 static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
 217 {
 218     pthread_once(once, init);
 219 }
 220
 221 static void ossl_init_thread_stop_wrap(void *local)
 222 {
 223     ossl_init_thread_stop((struct thread_local_inits_st *)local);
 224 }
 225
 226 static int ossl_init_setup_thread_stop(void)
 227 {
 228     /*
 229      * We use a dummy thread local key here. We use the destructor to detect
 230      * when the thread is going to stop
 231      */
 232     return (pthread_key_create(&threadstopkey,
 233                                ossl_init_thread_stop_wrap) == 0);
 234 }
 235
 236 static void ossl_init_thread_stop_cleanup(void)
 237 {
 238 }
 239
 240 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
 241 {
 242     struct thread_local_inits_st *local = pthread_getspecific(threadstopkey);
 243
 244     if (local == NULL && alloc) {
 245         local = OPENSSL_zalloc(sizeof *local);
 246         pthread_setspecific(threadstopkey, local);
 247     }
 248     if (!alloc) {
 249         pthread_setspecific(threadstopkey, NULL);
 250     }
 251
 252     return local;
 253 }
 254
 255 #endif
 256
 257 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
 258 struct ossl_init_stop_st {
 259     void (*handler)(void);
 260     OPENSSL_INIT_STOP *next;
 261 };
 262
 263 static OPENSSL_INIT_STOP *stop_handlers = NULL;
 264
 265 static OPENSSL_INIT_ONCE base = OPENSSL_INIT_ONCE_STATIC_INIT;
 266 static int base_inited = 0;
 267 static void ossl_init_base(void)
 268 {
 269 #ifdef OPENSSL_INIT_DEBUG
 270     fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
 271 #endif
 272     ossl_init_setup_thread_stop();
 273     atexit(OPENSSL_cleanup);
 274     OPENSSL_cpuid_setup();
 275     base_inited = 1;
 276 }
 277
 278 static OPENSSL_INIT_ONCE load_crypto_strings = OPENSSL_INIT_ONCE_STATIC_INIT;
 279 static int load_crypto_strings_inited = 0;
 280 static void ossl_init_no_load_crypto_strings(void)
 281 {
 282     /* Do nothing in this case */
 283     return;
 284 }
 285
 286 static void ossl_init_load_crypto_strings(void)
 287 {
 288     /*
 289      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 290      * pulling in all the error strings during static linking
 291      */
 292 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 293 # ifdef OPENSSL_INIT_DEBUG
 294     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
 295                     "err_load_crypto_strings_intern()\n");
 296 # endif
 297     err_load_crypto_strings_intern();
 298 #endif
 299     load_crypto_strings_inited = 1;
 300 }
 301
 302 static OPENSSL_INIT_ONCE add_all_ciphers = OPENSSL_INIT_ONCE_STATIC_INIT;
 303 static void ossl_init_add_all_ciphers(void)
 304 {
 305     /*
 306      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 307      * pulling in all the ciphers during static linking
 308      */
 309 #ifndef OPENSSL_NO_AUTOALGINIT
 310 # ifdef OPENSSL_INIT_DEBUG
 311     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
 312                     "openssl_add_all_ciphers_internal()\n");
 313 # endif
 314     openssl_add_all_ciphers_internal();
 315 # ifndef OPENSSL_NO_ENGINE
 316 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 317     ENGINE_setup_bsd_cryptodev();
 318 #  endif
 319 # endif
 320 #endif
 321 }
 322
 323 static OPENSSL_INIT_ONCE add_all_digests = OPENSSL_INIT_ONCE_STATIC_INIT;
 324 static void ossl_init_add_all_digests(void)
 325 {
 326     /*
 327      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 328      * pulling in all the ciphers during static linking
 329      */
 330 #ifndef OPENSSL_NO_AUTOALGINIT
 331 # ifdef OPENSSL_INIT_DEBUG
 332     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
 333                     "openssl_add_all_digests_internal()\n");
 334 # endif
 335     openssl_add_all_digests_internal();
 336 # ifndef OPENSSL_NO_ENGINE
 337 #  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
 338     ENGINE_setup_bsd_cryptodev();
 339 #  endif
 340 # endif
 341 #endif
 342 }
 343
 344 static void ossl_init_no_add_algs(void)
 345 {
 346     /* Do nothing */
 347     return;
 348 }
 349
 350 static OPENSSL_INIT_ONCE config = OPENSSL_INIT_ONCE_STATIC_INIT;
 351 static int config_inited = 0;
 352 static const char *config_filename;
 353 static void ossl_init_config(void)
 354 {
 355 #ifdef OPENSSL_INIT_DEBUG
 356     fprintf(stderr,
 357             "OPENSSL_INIT: ossl_init_config: openssl_config_internal(%s)\n",
 358             config_filename==NULL?"NULL":config_filename);
 359 #endif
 360     openssl_config_internal(config_filename);
 361     config_inited = 1;
 362 }
 363 static void ossl_init_no_config(void)
 364 {
 365 #ifdef OPENSSL_INIT_DEBUG
 366     fprintf(stderr,
 367             "OPENSSL_INIT: ossl_init_config: openssl_no_config_internal()\n");
 368 #endif
 369     openssl_no_config_internal();
 370     config_inited = 1;
 371 }
 372
 373 static OPENSSL_INIT_ONCE async = OPENSSL_INIT_ONCE_STATIC_INIT;
 374 static int async_inited = 0;
 375 static void ossl_init_async(void)
 376 {
 377 #ifdef OPENSSL_INIT_DEBUG
 378     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
 379 #endif
 380     async_init();
 381     async_inited = 1;
 382 }
 383
 384 #ifndef OPENSSL_NO_ENGINE
 385 static int engine_inited = 0;
 386 static OPENSSL_INIT_ONCE engine_openssl = OPENSSL_INIT_ONCE_STATIC_INIT;
 387 static void ossl_init_engine_openssl(void)
 388 {
 389 # ifdef OPENSSL_INIT_DEBUG
 390     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
 391                     "engine_load_openssl_internal()\n");
 392 # endif
 393     engine_load_openssl_internal();
 394     engine_inited = 1;
 395 }
 396 # if !defined(OPENSSL_NO_HW) && \
 397     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 398 static OPENSSL_INIT_ONCE engine_cryptodev = OPENSSL_INIT_ONCE_STATIC_INIT;
 399 static void ossl_init_engine_cryptodev(void)
 400 {
 401 #  ifdef OPENSSL_INIT_DEBUG
 402     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_cryptodev: "
 403                     "engine_load_cryptodev_internal()\n");
 404 #  endif
 405     engine_load_cryptodev_internal();
 406     engine_inited = 1;
 407 }
 408 # endif
 409
 410 # ifndef OPENSSL_NO_RDRAND
 411 static OPENSSL_INIT_ONCE engine_rdrand = OPENSSL_INIT_ONCE_STATIC_INIT;
 412 static void ossl_init_engine_rdrand(void)
 413 {
 414 #  ifdef OPENSSL_INIT_DEBUG
 415     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
 416                     "engine_load_rdrand_internal()\n");
 417 #  endif
 418     engine_load_rdrand_internal();
 419     engine_inited = 1;
 420 }
 421 # endif
 422 static OPENSSL_INIT_ONCE engine_dynamic = OPENSSL_INIT_ONCE_STATIC_INIT;
 423 static void ossl_init_engine_dynamic(void)
 424 {
 425 # ifdef OPENSSL_INIT_DEBUG
 426     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
 427                     "engine_load_dynamic_internal()\n");
 428 # endif
 429     engine_load_dynamic_internal();
 430     engine_inited = 1;
 431 }
 432 # ifndef OPENSSL_NO_STATIC_ENGINE
 433 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 434 static OPENSSL_INIT_ONCE engine_padlock = OPENSSL_INIT_ONCE_STATIC_INIT;
 435 static void ossl_init_engine_padlock(void)
 436 {
 437 #   ifdef OPENSSL_INIT_DEBUG
 438     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
 439                     "engine_load_padlock_internal()\n");
 440 #   endif
 441     engine_load_padlock_internal();
 442     engine_inited = 1;
 443 }
 444 #  endif
 445 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 446 static OPENSSL_INIT_ONCE engine_capi = OPENSSL_INIT_ONCE_STATIC_INIT;
 447 static void ossl_init_engine_capi(void)
 448 {
 449 #   ifdef OPENSSL_INIT_DEBUG
 450     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
 451                     "engine_load_capi_internal()\n");
 452 #   endif
 453     engine_load_capi_internal();
 454     engine_inited = 1;
 455 }
 456 #  endif
 457 static OPENSSL_INIT_ONCE engine_dasync = OPENSSL_INIT_ONCE_STATIC_INIT;
 458 static void ossl_init_engine_dasync(void)
 459 {
 460 # ifdef OPENSSL_INIT_DEBUG
 461     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dasync: "
 462                     "engine_load_dasync_internal()\n");
 463 # endif
 464     engine_load_dasync_internal();
 465     engine_inited = 1;
 466 }
 467 # endif
 468 #endif
 469
 470 static OPENSSL_INIT_ONCE zlib = OPENSSL_INIT_ONCE_STATIC_INIT;
 471 static int zlib_inited = 0;
 472 static void ossl_init_zlib(void)
 473 {
 474     /* Do nothing - we need to know about this for the later cleanup */
 475     zlib_inited = 1;
 476 }
 477
 478 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 479 {
 480     /* Can't do much about this */
 481     if (locals == NULL)
 482         return;
 483
 484     if (locals->async) {
 485 #ifdef OPENSSL_INIT_DEBUG
 486         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 487                         "ASYNC_cleanup_thread()\n");
 488 #endif
 489         ASYNC_cleanup_thread();
 490     }
 491
 492     if (locals->err_state) {
 493 #ifdef OPENSSL_INIT_DEBUG
 494         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 495                         "ERR_remove_thread_state(NULL)\n");
 496 #endif
 497         ERR_remove_thread_state(NULL);
 498     }
 499
 500     OPENSSL_free(locals);
 501     ossl_init_thread_stop_cleanup();
 502 }
 503
 504 void OPENSSL_thread_stop(void)
 505 {
 506     ossl_init_thread_stop(
 507         (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
 508 }
 509
 510 int ossl_init_thread_start(uint64_t opts)
 511 {
 512     struct thread_local_inits_st *locals = ossl_init_get_thread_local(1);
 513
 514     if (locals == NULL)
 515         return 0;
 516
 517     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
 518 #ifdef OPENSSL_INIT_DEBUG
 519         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 520                         "marking thread for async\n");
 521 #endif
 522         locals->async = 1;
 523     }
 524
 525     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
 526 #ifdef OPENSSL_INIT_DEBUG
 527         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 528                         "marking thread for err_state\n");
 529 #endif
 530         locals->err_state = 1;
 531     }
 532
 533     return 1;
 534 }
 535
 536 void OPENSSL_cleanup(void)
 537 {
 538     OPENSSL_INIT_STOP *currhandler, *lasthandler;
 539
 540     /* If we've not been inited then no need to deinit */
 541     if (!base_inited)
 542         return;
 543
 544     /* Might be explicitly called and also by atexit */
 545     if (stopped)
 546         return;
 547     stopped = 1;
 548
 549     /*
 550      * Thread stop may not get automatically called by the thread library for
 551      * the very last thread in some situations, so call it directly.
 552      */
 553     ossl_init_thread_stop(ossl_init_get_thread_local(0));
 554
 555     currhandler = stop_handlers;
 556     while (currhandler != NULL) {
 557         currhandler->handler();
 558         lasthandler = currhandler;
 559         currhandler = currhandler->next;
 560         OPENSSL_free(lasthandler);
 561     }
 562     stop_handlers = NULL;
 563     /*
 564      * We assume we are single-threaded for this function, i.e. no race
 565      * conditions for the various "*_inited" vars below.
 566      */
 567
 568     if (zlib_inited) {
 569 #ifdef OPENSSL_INIT_DEBUG
 570         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 571                         "COMP_zlib_cleanup()\n");
 572 #endif
 573         COMP_zlib_cleanup();
 574     }
 575
 576 #ifndef OPENSSL_NO_ENGINE
 577     if (engine_inited) {
 578 # ifdef OPENSSL_INIT_DEBUG
 579         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 580                         "ENGINE_cleanup()\n");
 581 # endif
 582         ENGINE_cleanup();
 583     }
 584 #endif
 585
 586     if (load_crypto_strings_inited) {
 587 #ifdef OPENSSL_INIT_DEBUG
 588         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 589                         "ERR_free_strings()\n");
 590 #endif
 591         ERR_free_strings();
 592     }
 593
 594 #ifdef OPENSSL_INIT_DEBUG
 595     fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
 596                     "CRYPTO_cleanup_all_ex_data()\n");
 597     fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
 598                     "EVP_cleanup()\n");
 599     fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
 600                     "CONF_modules_free()\n");
 601     fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
 602                     "RAND_cleanup()\n");
 603 #endif
 604     CRYPTO_cleanup_all_ex_data();
 605     EVP_cleanup();
 606     CONF_modules_free();
 607     RAND_cleanup();
 608     base_inited = 0;
 609 }
 610
 611 /*
 612  * If this function is called with a non NULL settings value then it must be
 613  * called prior to any threads making calls to any OpenSSL functions,
 614  * i.e. passing a non-null settings value is assumed to be single-threaded.
 615  */
 616 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 617 {
 618     static int stoperrset = 0;
 619
 620     if (stopped) {
 621         if (!stoperrset) {
 622             /*
 623              * We only ever set this once to avoid getting into an infinite
 624              * loop where the error system keeps trying to init and fails so
 625              * sets an error etc
 626              */
 627             stoperrset = 1;
 628             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
 629         }
 630         return 0;
 631     }
 632
 633     ossl_init_once_run(&base, ossl_init_base);
 634
 635     if (opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
 636         ossl_init_once_run(&load_crypto_strings,
 637                            ossl_init_no_load_crypto_strings);
 638
 639     if (opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
 640         ossl_init_once_run(&load_crypto_strings, ossl_init_load_crypto_strings);
 641
 642     if (opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
 643         ossl_init_once_run(&add_all_ciphers, ossl_init_no_add_algs);
 644
 645     if (opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
 646         ossl_init_once_run(&add_all_ciphers, ossl_init_add_all_ciphers);
 647
 648     if (opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
 649         ossl_init_once_run(&add_all_digests, ossl_init_no_add_algs);
 650
 651     if (opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
 652         ossl_init_once_run(&add_all_digests, ossl_init_add_all_digests);
 653
 654     if (opts & OPENSSL_INIT_NO_LOAD_CONFIG) {
 655         ossl_init_once_run(&config, ossl_init_no_config);
 656     }
 657
 658     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
 659         CRYPTO_w_lock(CRYPTO_LOCK_INIT);
 660         config_filename = (settings == NULL) ? NULL : settings->config_name;
 661         ossl_init_once_run(&config, ossl_init_config);
 662         CRYPTO_w_unlock(CRYPTO_LOCK_INIT);
 663     }
 664
 665     if (opts & OPENSSL_INIT_ASYNC) {
 666         ossl_init_once_run(&async, ossl_init_async);
 667     }
 668
 669 #ifndef OPENSSL_NO_ENGINE
 670     if (opts & OPENSSL_INIT_ENGINE_OPENSSL) {
 671         ossl_init_once_run(&engine_openssl, ossl_init_engine_openssl);
 672     }
 673 # if !defined(OPENSSL_NO_HW) && \
 674     (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
 675     if (opts & OPENSSL_INIT_ENGINE_CRYPTODEV) {
 676         ossl_init_once_run(&engine_cryptodev, ossl_init_engine_cryptodev);
 677     }
 678 # endif
 679 # ifndef OPENSSL_NO_RDRAND
 680     if (opts & OPENSSL_INIT_ENGINE_RDRAND) {
 681         ossl_init_once_run(&engine_rdrand, ossl_init_engine_rdrand);
 682     }
 683 # endif
 684     if (opts & OPENSSL_INIT_ENGINE_DYNAMIC) {
 685         ossl_init_once_run(&engine_dynamic, ossl_init_engine_dynamic);
 686     }
 687 # ifndef OPENSSL_NO_STATIC_ENGINE
 688 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 689     if (opts & OPENSSL_INIT_ENGINE_PADLOCK) {
 690         ossl_init_once_run(&engine_padlock, ossl_init_engine_padlock);
 691     }
 692 #  endif
 693 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 694     if (opts & OPENSSL_INIT_ENGINE_CAPI) {
 695         ossl_init_once_run(&engine_capi, ossl_init_engine_capi);
 696     }
 697 #  endif
 698     if (opts & OPENSSL_INIT_ENGINE_DASYNC) {
 699         ossl_init_once_run(&engine_dasync, ossl_init_engine_dasync);
 700     }
 701 # endif
 702     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
 703                 | OPENSSL_INIT_ENGINE_DASYNC | OPENSSL_INIT_ENGINE_OPENSSL)) {
 704         ENGINE_register_all_complete();
 705     }
 706 #endif
 707
 708     if (opts & OPENSSL_INIT_ZLIB) {
 709         ossl_init_once_run(&zlib, ossl_init_zlib);
 710     }
 711
 712     return 1;
 713 }
 714
 715 int OPENSSL_atexit(void (*handler)(void))
 716 {
 717     OPENSSL_INIT_STOP *newhand;
 718
 719     newhand = OPENSSL_malloc(sizeof(*newhand));
 720     if (newhand == NULL)
 721         return 0;
 722
 723     newhand->handler = handler;
 724     newhand->next = stop_handlers;
 725     stop_handlers = newhand;
 726
 727     return 1;
 728 }
 729
 730