2 * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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 #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 #ifdef OPENSSL_INIT_DEBUG
162 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n");
164 #if !defined(OPENSSL_NO_DSO) \
165 && !defined(OPENSSL_USE_NODELETE) \
166 && !defined(OPENSSL_NO_PINSHARED)
167 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
169 HMODULE handle = NULL;
172 /* We don't use the DSO route for WIN32 because there is a better way */
173 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
174 | GET_MODULE_HANDLE_EX_FLAG_PIN,
175 (void *)&base_inited, &handle);
177 # ifdef OPENSSL_INIT_DEBUG
178 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
179 (ret == TRUE ? "No!" : "Yes."));
181 return (ret == TRUE) ? 1 : 0;
185 * Deliberately leak a reference to ourselves. This will force the library
186 * to remain loaded until the atexit() handler is run at process exit.
192 if (!err_shelve_state(&err))
195 dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
196 # ifdef OPENSSL_INIT_DEBUG
197 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
198 (dso == NULL ? "No!" : "Yes."));
200 * In case of No!, it is uncertain our exit()-handlers can still be
201 * called. After dlclose() the whole library might have been unloaded
206 err_unshelve_state(err);
214 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
215 static int load_crypto_strings_inited = 0;
216 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
220 * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
221 * pulling in all the error strings during static linking
223 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
224 # ifdef OPENSSL_INIT_DEBUG
225 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
226 "err_load_crypto_strings_int()\n");
228 ret = err_load_crypto_strings_int();
229 load_crypto_strings_inited = 1;
234 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
235 ossl_init_load_crypto_strings)
237 /* Do nothing in this case */
241 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
242 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
245 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
246 * pulling in all the ciphers during static linking
248 #ifndef OPENSSL_NO_AUTOALGINIT
249 # ifdef OPENSSL_INIT_DEBUG
250 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
251 "openssl_add_all_ciphers_int()\n");
253 openssl_add_all_ciphers_int();
258 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
259 ossl_init_add_all_ciphers)
265 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
266 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
269 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
270 * pulling in all the ciphers during static linking
272 #ifndef OPENSSL_NO_AUTOALGINIT
273 # ifdef OPENSSL_INIT_DEBUG
274 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
275 "openssl_add_all_digests()\n");
277 openssl_add_all_digests_int();
282 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
283 ossl_init_add_all_digests)
289 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
290 static int config_inited = 0;
291 static const OPENSSL_INIT_SETTINGS *conf_settings = NULL;
292 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
294 int ret = openssl_config_int(conf_settings);
298 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
300 #ifdef OPENSSL_INIT_DEBUG
302 "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
304 openssl_no_config_int();
309 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
310 static int async_inited = 0;
311 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
313 #ifdef OPENSSL_INIT_DEBUG
314 fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
322 #ifndef OPENSSL_NO_ENGINE
323 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
324 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
326 # ifdef OPENSSL_INIT_DEBUG
327 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
328 "engine_load_openssl_int()\n");
330 engine_load_openssl_int();
333 # ifndef OPENSSL_NO_DEVCRYPTOENG
334 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
335 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
337 # ifdef OPENSSL_INIT_DEBUG
338 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
339 "engine_load_devcrypto_int()\n");
341 engine_load_devcrypto_int();
346 # ifndef OPENSSL_NO_RDRAND
347 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
348 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
350 # ifdef OPENSSL_INIT_DEBUG
351 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
352 "engine_load_rdrand_int()\n");
354 engine_load_rdrand_int();
358 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
359 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
361 # ifdef OPENSSL_INIT_DEBUG
362 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
363 "engine_load_dynamic_int()\n");
365 engine_load_dynamic_int();
368 # ifndef OPENSSL_NO_STATIC_ENGINE
369 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
370 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
371 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
373 # ifdef OPENSSL_INIT_DEBUG
374 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
375 "engine_load_padlock_int()\n");
377 engine_load_padlock_int();
381 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
382 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
383 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
385 # ifdef OPENSSL_INIT_DEBUG
386 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
387 "engine_load_capi_int()\n");
389 engine_load_capi_int();
393 # if !defined(OPENSSL_NO_AFALGENG)
394 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
395 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
397 # ifdef OPENSSL_INIT_DEBUG
398 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
399 "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 #ifdef OPENSSL_INIT_DEBUG
428 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
429 "async_delete_thread_state()\n");
431 async_delete_thread_state();
434 if (locals->err_state) {
435 #ifdef OPENSSL_INIT_DEBUG
436 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
437 "err_delete_thread_state()\n");
439 err_delete_thread_state();
443 #ifdef OPENSSL_INIT_DEBUG
444 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
445 "drbg_delete_thread_state()\n");
447 drbg_delete_thread_state();
450 OPENSSL_free(locals);
453 void OPENSSL_thread_stop(void)
455 if (destructor_key.sane != -1)
456 ossl_init_thread_stop(ossl_init_get_thread_local(0));
459 int ossl_init_thread_start(uint64_t opts)
461 struct thread_local_inits_st *locals;
463 if (!OPENSSL_init_crypto(0, NULL))
466 locals = ossl_init_get_thread_local(1);
471 if (opts & OPENSSL_INIT_THREAD_ASYNC) {
472 #ifdef OPENSSL_INIT_DEBUG
473 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
474 "marking thread for async\n");
479 if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
480 #ifdef OPENSSL_INIT_DEBUG
481 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
482 "marking thread for err_state\n");
484 locals->err_state = 1;
487 if (opts & OPENSSL_INIT_THREAD_RAND) {
488 #ifdef OPENSSL_INIT_DEBUG
489 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
490 "marking thread for rand\n");
498 void OPENSSL_cleanup(void)
500 OPENSSL_INIT_STOP *currhandler, *lasthandler;
501 CRYPTO_THREAD_LOCAL key;
503 /* If we've not been inited then no need to deinit */
507 /* Might be explicitly called and also by atexit */
513 * Thread stop may not get automatically called by the thread library for
514 * the very last thread in some situations, so call it directly.
516 ossl_init_thread_stop(ossl_init_get_thread_local(0));
518 currhandler = stop_handlers;
519 while (currhandler != NULL) {
520 currhandler->handler();
521 lasthandler = currhandler;
522 currhandler = currhandler->next;
523 OPENSSL_free(lasthandler);
525 stop_handlers = NULL;
527 CRYPTO_THREAD_lock_free(init_lock);
531 * We assume we are single-threaded for this function, i.e. no race
532 * conditions for the various "*_inited" vars below.
535 #ifndef OPENSSL_NO_COMP
537 #ifdef OPENSSL_INIT_DEBUG
538 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
539 "comp_zlib_cleanup_int()\n");
541 comp_zlib_cleanup_int();
546 # ifdef OPENSSL_INIT_DEBUG
547 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
553 if (load_crypto_strings_inited) {
554 #ifdef OPENSSL_INIT_DEBUG
555 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
556 "err_free_strings_int()\n");
558 err_free_strings_int();
561 key = destructor_key.value;
562 destructor_key.sane = -1;
563 CRYPTO_THREAD_cleanup_local(&key);
565 #ifdef OPENSSL_INIT_DEBUG
566 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
567 "rand_cleanup_int()\n");
568 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
569 "conf_modules_free_int()\n");
570 #ifndef OPENSSL_NO_ENGINE
571 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
572 "engine_cleanup_int()\n");
574 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
575 "crypto_cleanup_all_ex_data_int()\n");
576 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
577 "bio_sock_cleanup_int()\n");
578 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
580 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
581 "evp_cleanup_int()\n");
582 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
583 "obj_cleanup_int()\n");
584 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
588 * Note that cleanup order is important:
589 * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
590 * must be called before engine_cleanup_int()
591 * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
592 * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
593 * - conf_modules_free_int() can end up in ENGINE code so must be called
594 * before engine_cleanup_int()
595 * - ENGINEs and additional EVP algorithms might use added OIDs names so
596 * obj_cleanup_int() must be called last
599 rand_drbg_cleanup_int();
600 conf_modules_free_int();
601 #ifndef OPENSSL_NO_ENGINE
602 engine_cleanup_int();
604 ossl_store_cleanup_int();
605 crypto_cleanup_all_ex_data_int();
611 CRYPTO_secure_malloc_done();
617 * If this function is called with a non NULL settings value then it must be
618 * called prior to any threads making calls to any OpenSSL functions,
619 * i.e. passing a non-null settings value is assumed to be single-threaded.
621 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
624 if (!(opts & OPENSSL_INIT_BASE_ONLY))
625 CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
630 * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the
631 * *only* option specified. With that option we return immediately after
632 * doing the requested limited initialization. Note that
633 * err_shelve_state() called by us via ossl_init_load_crypto_nodelete()
634 * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with
635 * base already initialized this is a harmless NOOP.
637 * If we remain the only caller of err_shelve_state() the recursion should
638 * perhaps be removed, but if in doubt, it can be left in place.
640 if (!RUN_ONCE(&base, ossl_init_base))
642 if (opts & OPENSSL_INIT_BASE_ONLY)
646 * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls
647 * should not have the side-effect of setting up exit handlers, and
648 * therefore, this code block is below the INIT_BASE_ONLY-conditioned early
651 if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
652 if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
653 ossl_init_register_atexit))
655 } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
659 if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete))
662 if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
663 && !RUN_ONCE_ALT(&load_crypto_strings,
664 ossl_init_no_load_crypto_strings,
665 ossl_init_load_crypto_strings))
668 if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
669 && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
672 if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
673 && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
674 ossl_init_add_all_ciphers))
677 if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
678 && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
681 if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
682 && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
683 ossl_init_add_all_digests))
686 if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
687 && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
690 if ((opts & OPENSSL_INIT_ATFORK)
691 && !openssl_init_fork_handlers())
694 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
695 && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
698 if (opts & OPENSSL_INIT_LOAD_CONFIG) {
700 CRYPTO_THREAD_write_lock(init_lock);
701 conf_settings = settings;
702 ret = RUN_ONCE(&config, ossl_init_config);
703 conf_settings = NULL;
704 CRYPTO_THREAD_unlock(init_lock);
709 if ((opts & OPENSSL_INIT_ASYNC)
710 && !RUN_ONCE(&async, ossl_init_async))
713 #ifndef OPENSSL_NO_ENGINE
714 if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
715 && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
717 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
718 if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
719 && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
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 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
732 if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
733 && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
736 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
737 if ((opts & OPENSSL_INIT_ENGINE_CAPI)
738 && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
741 # if !defined(OPENSSL_NO_AFALGENG)
742 if ((opts & OPENSSL_INIT_ENGINE_AFALG)
743 && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
747 if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
748 | OPENSSL_INIT_ENGINE_OPENSSL
749 | OPENSSL_INIT_ENGINE_AFALG)) {
750 ENGINE_register_all_complete();
754 #ifndef OPENSSL_NO_COMP
755 if ((opts & OPENSSL_INIT_ZLIB)
756 && !RUN_ONCE(&zlib, ossl_init_zlib))
763 int OPENSSL_atexit(void (*handler)(void))
765 OPENSSL_INIT_STOP *newhand;
767 #if !defined(OPENSSL_NO_DSO) \
768 && !defined(OPENSSL_USE_NODELETE)\
769 && !defined(OPENSSL_NO_PINSHARED)
776 handlersym.func = handler;
777 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
779 HMODULE handle = NULL;
783 * We don't use the DSO route for WIN32 because there is a better
786 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
787 | GET_MODULE_HANDLE_EX_FLAG_PIN,
788 handlersym.sym, &handle);
795 * Deliberately leak a reference to the handler. This will force the
796 * library/code containing the handler to remain loaded until we run the
797 * atexit handler. If -znodelete has been used then this is
804 dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
805 # ifdef OPENSSL_INIT_DEBUG
807 "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
808 (dso == NULL ? "No!" : "Yes."));
809 /* See same code above in ossl_init_base() for an explanation. */
818 if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
819 CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
823 newhand->handler = handler;
824 newhand->next = stop_handlers;
825 stop_handlers = newhand;
830 #ifdef OPENSSL_SYS_UNIX
832 * The following three functions are for OpenSSL developers. This is
833 * where we set/reset state across fork (called via pthread_atfork when
834 * it exists, or manually by the application when it doesn't).
836 * WARNING! If you put code in either OPENSSL_fork_parent or
837 * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
838 * safe. See this link, for example:
839 * http://man7.org/linux/man-pages/man7/signal-safety.7.html
842 void OPENSSL_fork_prepare(void)
846 void OPENSSL_fork_parent(void)
850 void OPENSSL_fork_child(void)