2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
11 #include "internal/cryptlib_int.h"
12 #include <openssl/err.h>
13 #include "internal/rand_int.h"
14 #include "internal/bio.h"
15 #include <openssl/evp.h>
16 #include "internal/evp_int.h"
17 #include "internal/conf.h"
18 #include "internal/async.h"
19 #include "internal/engine.h"
20 #include "internal/comp.h"
21 #include "internal/err.h"
22 #include "internal/err_int.h"
23 #include "internal/objects.h"
26 #include "internal/thread_once.h"
27 #include "internal/dso_conf.h"
28 #include "internal/dso.h"
29 #include "internal/store.h"
31 static int stopped = 0;
34 * Since per-thread-specific-data destructors are not universally
35 * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key
36 * is assumed to have destructor associated. And then an effort is made
37 * to call this single destructor on non-pthread platform[s].
39 * Initial value is "impossible". It is used as guard value to shortcut
40 * destructor for threads terminating before libcrypto is initialized or
41 * after it's de-initialized. Access to the key doesn't have to be
42 * serialized for the said threads, because they didn't use libcrypto
43 * and it doesn't matter if they pick "impossible" or derefernce real
44 * key value and pull NULL past initialization in the first thread that
45 * intends to use libcrypto.
49 CRYPTO_THREAD_LOCAL value;
50 } destructor_key = { -1 };
52 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
54 static void ossl_init_thread_destructor(void *local)
56 ossl_init_thread_stop((struct thread_local_inits_st *)local);
59 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
61 struct thread_local_inits_st *local =
62 CRYPTO_THREAD_get_local(&destructor_key.value);
66 && (local = OPENSSL_zalloc(sizeof(*local))) != NULL
67 && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) {
72 CRYPTO_THREAD_set_local(&destructor_key.value, NULL);
78 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
79 struct ossl_init_stop_st {
80 void (*handler)(void);
81 OPENSSL_INIT_STOP *next;
84 static OPENSSL_INIT_STOP *stop_handlers = NULL;
85 static CRYPTO_RWLOCK *init_lock = NULL;
87 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
88 static int base_inited = 0;
89 DEFINE_RUN_ONCE_STATIC(ossl_init_base)
91 CRYPTO_THREAD_LOCAL key;
93 #ifdef OPENSSL_INIT_DEBUG
94 fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
96 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
97 ossl_malloc_setup_failures();
99 if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor))
101 if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
103 OPENSSL_cpuid_setup();
105 destructor_key.value = key;
110 #ifdef OPENSSL_INIT_DEBUG
111 fprintf(stderr, "OPENSSL_INIT: ossl_init_base not ok!\n");
113 CRYPTO_THREAD_lock_free(init_lock);
116 CRYPTO_THREAD_cleanup_local(&key);
120 static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT;
121 DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit)
123 # ifdef OPENSSL_INIT_DEBUG
124 fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n");
126 #ifndef OPENSSL_SYS_UEFI
127 if (atexit(OPENSSL_cleanup) != 0)
134 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit,
135 ossl_init_register_atexit)
137 #ifdef OPENSSL_INIT_DEBUG
138 fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n");
140 /* Do nothing in this case */
144 static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT;
145 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete)
147 #ifdef OPENSSL_INIT_DEBUG
148 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n");
150 #if !defined(OPENSSL_NO_DSO) \
151 && !defined(OPENSSL_USE_NODELETE) \
152 && !defined(OPENSSL_NO_PINSHARED)
155 HMODULE handle = NULL;
158 /* We don't use the DSO route for WIN32 because there is a better way */
159 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
160 | GET_MODULE_HANDLE_EX_FLAG_PIN,
161 (void *)&base_inited, &handle);
163 # ifdef OPENSSL_INIT_DEBUG
164 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
165 (ret == TRUE ? "No!" : "Yes."));
167 return (ret == TRUE) ? 1 : 0;
171 * Deliberately leak a reference to ourselves. This will force the library
172 * to remain loaded until the atexit() handler is run at process exit.
178 if (!err_shelve_state(&err))
181 dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
182 # ifdef OPENSSL_INIT_DEBUG
183 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
184 (dso == NULL ? "No!" : "Yes."));
186 * In case of No!, it is uncertain our exit()-handlers can still be
187 * called. After dlclose() the whole library might have been unloaded
192 err_unshelve_state(err);
200 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
201 static int load_crypto_strings_inited = 0;
202 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
206 * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
207 * pulling in all the error strings during static linking
209 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
210 # ifdef OPENSSL_INIT_DEBUG
211 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
212 "err_load_crypto_strings_int()\n");
214 ret = err_load_crypto_strings_int();
215 load_crypto_strings_inited = 1;
220 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
221 ossl_init_load_crypto_strings)
223 /* Do nothing in this case */
227 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
228 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
231 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
232 * pulling in all the ciphers during static linking
234 #ifndef OPENSSL_NO_AUTOALGINIT
235 # ifdef OPENSSL_INIT_DEBUG
236 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
237 "openssl_add_all_ciphers_int()\n");
239 openssl_add_all_ciphers_int();
244 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
245 ossl_init_add_all_ciphers)
251 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
252 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
255 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
256 * pulling in all the ciphers during static linking
258 #ifndef OPENSSL_NO_AUTOALGINIT
259 # ifdef OPENSSL_INIT_DEBUG
260 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
261 "openssl_add_all_digests()\n");
263 openssl_add_all_digests_int();
268 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
269 ossl_init_add_all_digests)
275 static CRYPTO_ONCE add_all_macs = CRYPTO_ONCE_STATIC_INIT;
276 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_macs)
279 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
280 * pulling in all the macs during static linking
282 #ifndef OPENSSL_NO_AUTOALGINIT
283 # ifdef OPENSSL_INIT_DEBUG
284 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_macs: "
285 "openssl_add_all_macs_int()\n");
287 openssl_add_all_macs_int();
292 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_macs, ossl_init_add_all_macs)
298 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
299 static int config_inited = 0;
300 static const char *appname;
301 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
303 #ifdef OPENSSL_INIT_DEBUG
305 "OPENSSL_INIT: ossl_init_config: openssl_config(%s)\n",
306 appname == NULL ? "NULL" : appname);
308 openssl_config_int(appname);
312 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
314 #ifdef OPENSSL_INIT_DEBUG
316 "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
318 openssl_no_config_int();
323 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
324 static int async_inited = 0;
325 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
327 #ifdef OPENSSL_INIT_DEBUG
328 fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
336 #ifndef OPENSSL_NO_ENGINE
337 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
338 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
340 # ifdef OPENSSL_INIT_DEBUG
341 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
342 "engine_load_openssl_int()\n");
344 engine_load_openssl_int();
347 # ifndef OPENSSL_NO_DEVCRYPTOENG
348 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
349 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
351 # ifdef OPENSSL_INIT_DEBUG
352 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
353 "engine_load_devcrypto_int()\n");
355 engine_load_devcrypto_int();
360 # ifndef OPENSSL_NO_RDRAND
361 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
362 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
364 # ifdef OPENSSL_INIT_DEBUG
365 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
366 "engine_load_rdrand_int()\n");
368 engine_load_rdrand_int();
372 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
373 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
375 # ifdef OPENSSL_INIT_DEBUG
376 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
377 "engine_load_dynamic_int()\n");
379 engine_load_dynamic_int();
382 # ifndef OPENSSL_NO_STATIC_ENGINE
383 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
384 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
385 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
387 # ifdef OPENSSL_INIT_DEBUG
388 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
389 "engine_load_padlock_int()\n");
391 engine_load_padlock_int();
395 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
396 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
397 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
399 # ifdef OPENSSL_INIT_DEBUG
400 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
401 "engine_load_capi_int()\n");
403 engine_load_capi_int();
407 # if !defined(OPENSSL_NO_AFALGENG)
408 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
409 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
411 # ifdef OPENSSL_INIT_DEBUG
412 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
413 "engine_load_afalg_int()\n");
415 engine_load_afalg_int();
422 #ifndef OPENSSL_NO_COMP
423 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
425 static int zlib_inited = 0;
426 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
428 /* Do nothing - we need to know about this for the later cleanup */
434 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
436 /* Can't do much about this */
441 #ifdef OPENSSL_INIT_DEBUG
442 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
443 "async_delete_thread_state()\n");
445 async_delete_thread_state();
448 if (locals->err_state) {
449 #ifdef OPENSSL_INIT_DEBUG
450 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
451 "err_delete_thread_state()\n");
453 err_delete_thread_state();
457 #ifdef OPENSSL_INIT_DEBUG
458 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
459 "drbg_delete_thread_state()\n");
461 drbg_delete_thread_state();
464 OPENSSL_free(locals);
467 void OPENSSL_thread_stop(void)
469 if (destructor_key.sane != -1)
470 ossl_init_thread_stop(ossl_init_get_thread_local(0));
473 int ossl_init_thread_start(uint64_t opts)
475 struct thread_local_inits_st *locals;
477 if (!OPENSSL_init_crypto(0, NULL))
480 locals = ossl_init_get_thread_local(1);
485 if (opts & OPENSSL_INIT_THREAD_ASYNC) {
486 #ifdef OPENSSL_INIT_DEBUG
487 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
488 "marking thread for async\n");
493 if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
494 #ifdef OPENSSL_INIT_DEBUG
495 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
496 "marking thread for err_state\n");
498 locals->err_state = 1;
501 if (opts & OPENSSL_INIT_THREAD_RAND) {
502 #ifdef OPENSSL_INIT_DEBUG
503 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
504 "marking thread for rand\n");
512 void OPENSSL_cleanup(void)
514 OPENSSL_INIT_STOP *currhandler, *lasthandler;
515 CRYPTO_THREAD_LOCAL key;
517 /* If we've not been inited then no need to deinit */
521 /* Might be explicitly called and also by atexit */
527 * Thread stop may not get automatically called by the thread library for
528 * the very last thread in some situations, so call it directly.
530 ossl_init_thread_stop(ossl_init_get_thread_local(0));
532 currhandler = stop_handlers;
533 while (currhandler != NULL) {
534 currhandler->handler();
535 lasthandler = currhandler;
536 currhandler = currhandler->next;
537 OPENSSL_free(lasthandler);
539 stop_handlers = NULL;
541 CRYPTO_THREAD_lock_free(init_lock);
545 * We assume we are single-threaded for this function, i.e. no race
546 * conditions for the various "*_inited" vars below.
549 #ifndef OPENSSL_NO_COMP
551 #ifdef OPENSSL_INIT_DEBUG
552 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
553 "comp_zlib_cleanup_int()\n");
555 comp_zlib_cleanup_int();
560 # ifdef OPENSSL_INIT_DEBUG
561 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
567 if (load_crypto_strings_inited) {
568 #ifdef OPENSSL_INIT_DEBUG
569 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
570 "err_free_strings_int()\n");
572 err_free_strings_int();
575 key = destructor_key.value;
576 destructor_key.sane = -1;
577 CRYPTO_THREAD_cleanup_local(&key);
579 #ifdef OPENSSL_INIT_DEBUG
580 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
581 "rand_cleanup_int()\n");
582 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
583 "conf_modules_free_int()\n");
584 #ifndef OPENSSL_NO_ENGINE
585 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
586 "engine_cleanup_int()\n");
588 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
589 "crypto_cleanup_all_ex_data_int()\n");
590 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
591 "bio_sock_cleanup_int()\n");
592 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
594 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
595 "evp_cleanup_int()\n");
596 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
597 "obj_cleanup_int()\n");
598 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
602 * Note that cleanup order is important:
603 * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
604 * must be called before engine_cleanup_int()
605 * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
606 * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
607 * - conf_modules_free_int() can end up in ENGINE code so must be called
608 * before engine_cleanup_int()
609 * - ENGINEs and additional EVP algorithms might use added OIDs names so
610 * obj_cleanup_int() must be called last
613 rand_drbg_cleanup_int();
614 conf_modules_free_int();
615 #ifndef OPENSSL_NO_ENGINE
616 engine_cleanup_int();
618 ossl_store_cleanup_int();
619 crypto_cleanup_all_ex_data_int();
625 CRYPTO_secure_malloc_done();
631 * If this function is called with a non NULL settings value then it must be
632 * called prior to any threads making calls to any OpenSSL functions,
633 * i.e. passing a non-null settings value is assumed to be single-threaded.
635 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
638 if (!(opts & OPENSSL_INIT_BASE_ONLY))
639 CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
643 if (!RUN_ONCE(&base, ossl_init_base))
646 if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
647 if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
648 ossl_init_register_atexit))
650 } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
654 if (!(opts & OPENSSL_INIT_BASE_ONLY)
655 && !RUN_ONCE(&load_crypto_nodelete,
656 ossl_init_load_crypto_nodelete))
659 if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
660 && !RUN_ONCE_ALT(&load_crypto_strings,
661 ossl_init_no_load_crypto_strings,
662 ossl_init_load_crypto_strings))
665 if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
666 && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
669 if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
670 && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
671 ossl_init_add_all_ciphers))
674 if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
675 && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
678 if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
679 && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
680 ossl_init_add_all_digests))
683 if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
684 && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
687 if ((opts & OPENSSL_INIT_NO_ADD_ALL_MACS)
688 && !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
689 ossl_init_add_all_macs))
692 if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
693 && !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
696 if ((opts & OPENSSL_INIT_ATFORK)
697 && !openssl_init_fork_handlers())
700 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
701 && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
704 if (opts & OPENSSL_INIT_LOAD_CONFIG) {
706 CRYPTO_THREAD_write_lock(init_lock);
707 appname = (settings == NULL) ? NULL : settings->appname;
708 ret = RUN_ONCE(&config, ossl_init_config);
709 CRYPTO_THREAD_unlock(init_lock);
714 if ((opts & OPENSSL_INIT_ASYNC)
715 && !RUN_ONCE(&async, ossl_init_async))
718 #ifndef OPENSSL_NO_ENGINE
719 if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
720 && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
722 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
723 if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
724 && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
727 # ifndef OPENSSL_NO_RDRAND
728 if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
729 && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
732 if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
733 && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
735 # ifndef OPENSSL_NO_STATIC_ENGINE
736 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
737 if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
738 && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
741 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
742 if ((opts & OPENSSL_INIT_ENGINE_CAPI)
743 && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
746 # if !defined(OPENSSL_NO_AFALGENG)
747 if ((opts & OPENSSL_INIT_ENGINE_AFALG)
748 && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
752 if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
753 | OPENSSL_INIT_ENGINE_OPENSSL
754 | OPENSSL_INIT_ENGINE_AFALG)) {
755 ENGINE_register_all_complete();
759 #ifndef OPENSSL_NO_COMP
760 if ((opts & OPENSSL_INIT_ZLIB)
761 && !RUN_ONCE(&zlib, ossl_init_zlib))
768 int OPENSSL_atexit(void (*handler)(void))
770 OPENSSL_INIT_STOP *newhand;
772 #if !defined(OPENSSL_NO_DSO) \
773 && !defined(OPENSSL_USE_NODELETE)\
774 && !defined(OPENSSL_NO_PINSHARED)
781 handlersym.func = handler;
784 HMODULE handle = NULL;
788 * We don't use the DSO route for WIN32 because there is a better
791 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
792 | GET_MODULE_HANDLE_EX_FLAG_PIN,
793 handlersym.sym, &handle);
800 * Deliberately leak a reference to the handler. This will force the
801 * library/code containing the handler to remain loaded until we run the
802 * atexit handler. If -znodelete has been used then this is
809 dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
810 # ifdef OPENSSL_INIT_DEBUG
812 "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
813 (dso == NULL ? "No!" : "Yes."));
814 /* See same code above in ossl_init_base() for an explanation. */
823 if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
824 CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
828 newhand->handler = handler;
829 newhand->next = stop_handlers;
830 stop_handlers = newhand;
835 #ifdef OPENSSL_SYS_UNIX
837 * The following three functions are for OpenSSL developers. This is
838 * where we set/reset state across fork (called via pthread_atfork when
839 * it exists, or manually by the application when it doesn't).
841 * WARNING! If you put code in either OPENSSL_fork_parent or
842 * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
843 * safe. See this link, for example:
844 * http://man7.org/linux/man-pages/man7/signal-safety.7.html
847 void OPENSSL_fork_prepare(void)
851 void OPENSSL_fork_parent(void)
855 void OPENSSL_fork_child(void)