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"
30 #include <openssl/trace.h>
32 static int stopped = 0;
35 * Since per-thread-specific-data destructors are not universally
36 * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key
37 * is assumed to have destructor associated. And then an effort is made
38 * to call this single destructor on non-pthread platform[s].
40 * Initial value is "impossible". It is used as guard value to shortcut
41 * destructor for threads terminating before libcrypto is initialized or
42 * after it's de-initialized. Access to the key doesn't have to be
43 * serialized for the said threads, because they didn't use libcrypto
44 * and it doesn't matter if they pick "impossible" or derefernce real
45 * key value and pull NULL past initialization in the first thread that
46 * intends to use libcrypto.
50 CRYPTO_THREAD_LOCAL value;
51 } destructor_key = { -1 };
53 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
55 static void ossl_init_thread_destructor(void *local)
57 ossl_init_thread_stop((struct thread_local_inits_st *)local);
60 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
62 struct thread_local_inits_st *local =
63 CRYPTO_THREAD_get_local(&destructor_key.value);
67 && (local = OPENSSL_zalloc(sizeof(*local))) != NULL
68 && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) {
73 CRYPTO_THREAD_set_local(&destructor_key.value, NULL);
79 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
80 struct ossl_init_stop_st {
81 void (*handler)(void);
82 OPENSSL_INIT_STOP *next;
85 static OPENSSL_INIT_STOP *stop_handlers = NULL;
86 static CRYPTO_RWLOCK *init_lock = NULL;
88 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
89 static int base_inited = 0;
90 DEFINE_RUN_ONCE_STATIC(ossl_init_base)
92 CRYPTO_THREAD_LOCAL key;
94 if (ossl_trace_init() == 0)
97 OSSL_TRACE(INIT, "ossl_init_base: setting up stop handlers\n");
98 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
99 ossl_malloc_setup_failures();
101 if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor))
103 if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
105 OPENSSL_cpuid_setup();
107 destructor_key.value = key;
112 OSSL_TRACE(INIT, "ossl_init_base failed!\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 #if !defined(OPENSSL_SYS_UEFI) && defined(_WIN32)
122 static int win32atexit(void)
129 DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit)
131 #ifdef OPENSSL_INIT_DEBUG
132 fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n");
134 #ifndef OPENSSL_SYS_UEFI
136 /* We use _onexit() in preference because it gets called on DLL unload */
137 if (_onexit(win32atexit) == NULL)
140 if (atexit(OPENSSL_cleanup) != 0)
148 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit,
149 ossl_init_register_atexit)
151 #ifdef OPENSSL_INIT_DEBUG
152 fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n");
154 /* Do nothing in this case */
158 static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT;
159 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete)
161 OSSL_TRACE(INIT, "ossl_init_load_crypto_nodelete()\n");
163 #if !defined(OPENSSL_USE_NODELETE) \
164 && !defined(OPENSSL_NO_PINSHARED)
165 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
167 HMODULE handle = NULL;
170 /* We don't use the DSO route for WIN32 because there is a better way */
171 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
172 | GET_MODULE_HANDLE_EX_FLAG_PIN,
173 (void *)&base_inited, &handle);
176 "ossl_init_load_crypto_nodelete: "
177 "obtained DSO reference? %s\n",
178 (ret == TRUE ? "No!" : "Yes."));
179 return (ret == TRUE) ? 1 : 0;
181 # elif !defined(DSO_NONE)
183 * Deliberately leak a reference to ourselves. This will force the library
184 * to remain loaded until the atexit() handler is run at process exit.
190 if (!err_shelve_state(&err))
193 dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
195 * In case of No!, it is uncertain our exit()-handlers can still be
196 * called. After dlclose() the whole library might have been unloaded
199 OSSL_TRACE1(INIT, "obtained DSO reference? %s\n",
200 (dso == NULL ? "No!" : "Yes."));
202 err_unshelve_state(err);
210 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
211 static int load_crypto_strings_inited = 0;
212 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
216 * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
217 * pulling in all the error strings during static linking
219 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
220 OSSL_TRACE(INIT, "err_load_crypto_strings_int()\n");
221 ret = err_load_crypto_strings_int();
222 load_crypto_strings_inited = 1;
227 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
228 ossl_init_load_crypto_strings)
230 /* Do nothing in this case */
234 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
235 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
238 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
239 * pulling in all the ciphers during static linking
241 #ifndef OPENSSL_NO_AUTOALGINIT
242 OSSL_TRACE(INIT, "openssl_add_all_ciphers_int()\n");
243 openssl_add_all_ciphers_int();
248 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
249 ossl_init_add_all_ciphers)
255 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
256 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
259 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
260 * pulling in all the ciphers during static linking
262 #ifndef OPENSSL_NO_AUTOALGINIT
263 OSSL_TRACE(INIT, "openssl_add_all_digests()\n");
264 openssl_add_all_digests_int();
269 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
270 ossl_init_add_all_digests)
276 static CRYPTO_ONCE add_all_macs = CRYPTO_ONCE_STATIC_INIT;
277 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_macs)
280 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
281 * pulling in all the macs during static linking
283 #ifndef OPENSSL_NO_AUTOALGINIT
284 OSSL_TRACE(INIT, "openssl_add_all_macs_int()\n");
285 openssl_add_all_macs_int();
290 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_macs, ossl_init_add_all_macs)
296 static CRYPTO_ONCE add_all_kdfs = CRYPTO_ONCE_STATIC_INIT;
297 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_kdfs)
300 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
301 * pulling in all the macs during static linking
303 #ifndef OPENSSL_NO_AUTOALGINIT
304 OSSL_TRACE(INIT, "openssl_add_all_kdfs_int()\n");
305 openssl_add_all_kdfs_int();
310 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_kdfs, ossl_init_add_all_kdfs)
316 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
317 static int config_inited = 0;
318 static const OPENSSL_INIT_SETTINGS *conf_settings = NULL;
319 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
321 int ret = openssl_config_int(conf_settings);
325 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
327 OSSL_TRACE(INIT, "openssl_no_config_int()\n");
328 openssl_no_config_int();
333 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
334 static int async_inited = 0;
335 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
337 OSSL_TRACE(INIT, "async_init()\n");
344 #ifndef OPENSSL_NO_ENGINE
345 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
346 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
348 OSSL_TRACE(INIT, "engine_load_openssl_int()\n");
349 engine_load_openssl_int();
352 # ifndef OPENSSL_NO_RDRAND
353 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
354 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
356 OSSL_TRACE(INIT, "engine_load_rdrand_int()\n");
357 engine_load_rdrand_int();
361 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
362 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
364 OSSL_TRACE(INIT, "engine_load_dynamic_int()\n");
365 engine_load_dynamic_int();
368 # ifndef OPENSSL_NO_STATIC_ENGINE
369 # ifndef OPENSSL_NO_DEVCRYPTOENG
370 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
371 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
373 OSSL_TRACE(INIT, "engine_load_devcrypto_int()\n");
374 engine_load_devcrypto_int();
378 # if !defined(OPENSSL_NO_PADLOCKENG)
379 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
380 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
382 OSSL_TRACE(INIT, "engine_load_padlock_int()\n");
383 engine_load_padlock_int();
387 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
388 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
389 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
391 OSSL_TRACE(INIT, "engine_load_capi_int()\n");
392 engine_load_capi_int();
396 # if !defined(OPENSSL_NO_AFALGENG)
397 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
398 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
400 OSSL_TRACE(INIT, "engine_load_afalg_int()\n");
401 engine_load_afalg_int();
408 #ifndef OPENSSL_NO_COMP
409 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
411 static int zlib_inited = 0;
412 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
414 /* Do nothing - we need to know about this for the later cleanup */
420 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
422 /* Can't do much about this */
427 OSSL_TRACE(INIT, "async_delete_thread_state()\n");
428 async_delete_thread_state();
431 if (locals->err_state) {
432 OSSL_TRACE(INIT, "err_delete_thread_state()\n");
433 err_delete_thread_state();
437 OSSL_TRACE(INIT, "drbg_delete_thread_state()\n");
438 drbg_delete_thread_state();
441 OPENSSL_free(locals);
444 void OPENSSL_thread_stop(void)
446 if (destructor_key.sane != -1)
447 ossl_init_thread_stop(ossl_init_get_thread_local(0));
450 int ossl_init_thread_start(uint64_t opts)
452 struct thread_local_inits_st *locals;
454 if (!OPENSSL_init_crypto(0, NULL))
457 locals = ossl_init_get_thread_local(1);
462 if (opts & OPENSSL_INIT_THREAD_ASYNC) {
464 "ossl_init_thread_start: "
465 "marking thread for async\n");
469 if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
471 "ossl_init_thread_start: "
472 "marking thread for err_state\n");
473 locals->err_state = 1;
476 if (opts & OPENSSL_INIT_THREAD_RAND) {
478 "ossl_init_thread_start: "
479 "marking thread for rand\n");
486 void OPENSSL_cleanup(void)
488 OPENSSL_INIT_STOP *currhandler, *lasthandler;
489 CRYPTO_THREAD_LOCAL key;
492 * TODO(3.0): This function needs looking at with a view to moving most/all
493 * of this into onfree handlers in OPENSSL_CTX.
496 /* If we've not been inited then no need to deinit */
500 /* Might be explicitly called and also by atexit */
506 * Thread stop may not get automatically called by the thread library for
507 * the very last thread in some situations, so call it directly.
509 ossl_init_thread_stop(ossl_init_get_thread_local(0));
511 currhandler = stop_handlers;
512 while (currhandler != NULL) {
513 currhandler->handler();
514 lasthandler = currhandler;
515 currhandler = currhandler->next;
516 OPENSSL_free(lasthandler);
518 stop_handlers = NULL;
520 CRYPTO_THREAD_lock_free(init_lock);
524 * We assume we are single-threaded for this function, i.e. no race
525 * conditions for the various "*_inited" vars below.
528 #ifndef OPENSSL_NO_COMP
530 OSSL_TRACE(INIT, "OPENSSL_cleanup: comp_zlib_cleanup_int()\n");
531 comp_zlib_cleanup_int();
536 OSSL_TRACE(INIT, "OPENSSL_cleanup: async_deinit()\n");
540 if (load_crypto_strings_inited) {
541 OSSL_TRACE(INIT, "OPENSSL_cleanup: err_free_strings_int()\n");
542 err_free_strings_int();
545 key = destructor_key.value;
546 destructor_key.sane = -1;
547 CRYPTO_THREAD_cleanup_local(&key);
550 * Note that cleanup order is important:
551 * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
552 * must be called before engine_cleanup_int()
553 * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
554 * before the ex data handlers are wiped during default openssl_ctx deinit.
555 * - conf_modules_free_int() can end up in ENGINE code so must be called
556 * before engine_cleanup_int()
557 * - ENGINEs and additional EVP algorithms might use added OIDs names so
558 * obj_cleanup_int() must be called last
560 OSSL_TRACE(INIT, "OPENSSL_cleanup: rand_cleanup_int()\n");
563 OSSL_TRACE(INIT, "OPENSSL_cleanup: conf_modules_free_int()\n");
564 conf_modules_free_int();
566 #ifndef OPENSSL_NO_ENGINE
567 OSSL_TRACE(INIT, "OPENSSL_cleanup: engine_cleanup_int()\n");
568 engine_cleanup_int();
570 OSSL_TRACE(INIT, "OPENSSL_cleanup: ossl_store_cleanup_int()\n");
571 ossl_store_cleanup_int();
573 OSSL_TRACE(INIT, "OPENSSL_cleanup: openssl_ctx_default_deinit()\n");
574 openssl_ctx_default_deinit();
576 OSSL_TRACE(INIT, "OPENSSL_cleanup: bio_cleanup()\n");
579 OSSL_TRACE(INIT, "OPENSSL_cleanup: evp_cleanup_int()\n");
582 OSSL_TRACE(INIT, "OPENSSL_cleanup: obj_cleanup_int()\n");
585 OSSL_TRACE(INIT, "OPENSSL_cleanup: err_int()\n");
588 OSSL_TRACE(INIT, "OPENSSL_cleanup: CRYPTO_secure_malloc_done()\n");
589 CRYPTO_secure_malloc_done();
591 OSSL_TRACE(INIT, "OPENSSL_cleanup: ossl_trace_cleanup()\n");
592 ossl_trace_cleanup();
598 * If this function is called with a non NULL settings value then it must be
599 * called prior to any threads making calls to any OpenSSL functions,
600 * i.e. passing a non-null settings value is assumed to be single-threaded.
602 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
605 * TODO(3.0): This function needs looking at with a view to moving most/all
606 * of this into OPENSSL_CTX.
610 if (!(opts & OPENSSL_INIT_BASE_ONLY))
611 CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
616 * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the
617 * *only* option specified. With that option we return immediately after
618 * doing the requested limited initialization. Note that
619 * err_shelve_state() called by us via ossl_init_load_crypto_nodelete()
620 * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with
621 * base already initialized this is a harmless NOOP.
623 * If we remain the only caller of err_shelve_state() the recursion should
624 * perhaps be removed, but if in doubt, it can be left in place.
626 if (!RUN_ONCE(&base, ossl_init_base))
629 if (opts & OPENSSL_INIT_BASE_ONLY)
633 * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls
634 * should not have the side-effect of setting up exit handlers, and
635 * therefore, this code block is below the INIT_BASE_ONLY-conditioned early
638 if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
639 if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
640 ossl_init_register_atexit))
642 } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
646 if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete))
649 if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
650 && !RUN_ONCE_ALT(&load_crypto_strings,
651 ossl_init_no_load_crypto_strings,
652 ossl_init_load_crypto_strings))
655 if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
656 && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
659 if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
660 && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
661 ossl_init_add_all_ciphers))
664 if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
665 && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
668 if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
669 && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
670 ossl_init_add_all_digests))
673 if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
674 && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
677 if ((opts & OPENSSL_INIT_NO_ADD_ALL_MACS)
678 && !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
679 ossl_init_add_all_macs))
682 if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
683 && !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
686 if ((opts & OPENSSL_INIT_NO_ADD_ALL_KDFS)
687 && !RUN_ONCE_ALT(&add_all_kdfs, ossl_init_no_add_all_kdfs,
688 ossl_init_add_all_kdfs))
691 if ((opts & OPENSSL_INIT_ADD_ALL_KDFS)
692 && !RUN_ONCE(&add_all_kdfs, ossl_init_add_all_kdfs))
695 if ((opts & OPENSSL_INIT_ATFORK)
696 && !openssl_init_fork_handlers())
699 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
700 && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
703 if (opts & OPENSSL_INIT_LOAD_CONFIG) {
705 CRYPTO_THREAD_write_lock(init_lock);
706 conf_settings = settings;
707 ret = RUN_ONCE(&config, ossl_init_config);
708 conf_settings = NULL;
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 # ifndef OPENSSL_NO_RDRAND
723 if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
724 && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
727 if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
728 && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
730 # ifndef OPENSSL_NO_STATIC_ENGINE
731 # ifndef OPENSSL_NO_DEVCRYPTOENG
732 if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
733 && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
736 # if !defined(OPENSSL_NO_PADLOCKENG)
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_USE_NODELETE)\
773 && !defined(OPENSSL_NO_PINSHARED)
780 handlersym.func = handler;
781 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
783 HMODULE handle = NULL;
787 * We don't use the DSO route for WIN32 because there is a better
790 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
791 | GET_MODULE_HANDLE_EX_FLAG_PIN,
792 handlersym.sym, &handle);
797 # elif !defined(DSO_NONE)
799 * Deliberately leak a reference to the handler. This will force the
800 * library/code containing the handler to remain loaded until we run the
801 * atexit handler. If -znodelete has been used then this is
808 dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
809 /* See same code above in ossl_init_base() for an explanation. */
811 "atexit: obtained DSO reference? %s\n",
812 (dso == NULL ? "No!" : "Yes."));
820 if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
821 CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
825 newhand->handler = handler;
826 newhand->next = stop_handlers;
827 stop_handlers = newhand;
832 #ifdef OPENSSL_SYS_UNIX
834 * The following three functions are for OpenSSL developers. This is
835 * where we set/reset state across fork (called via pthread_atfork when
836 * it exists, or manually by the application when it doesn't).
838 * WARNING! If you put code in either OPENSSL_fork_parent or
839 * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
840 * safe. See this link, for example:
841 * http://man7.org/linux/man-pages/man7/signal-safety.7.html
844 void OPENSSL_fork_prepare(void)
848 void OPENSSL_fork_parent(void)
852 void OPENSSL_fork_child(void)
855 /* TODO(3.0): Inform all providers about a fork event */