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 #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)
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 add_all_macs = CRYPTO_ONCE_STATIC_INIT;
290 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_macs)
293 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
294 * pulling in all the macs during static linking
296 #ifndef OPENSSL_NO_AUTOALGINIT
297 # ifdef OPENSSL_INIT_DEBUG
298 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_macs: "
299 "openssl_add_all_macs_int()\n");
301 openssl_add_all_macs_int();
306 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_macs, ossl_init_add_all_macs)
312 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
313 static int config_inited = 0;
314 static const char *appname;
315 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
317 #ifdef OPENSSL_INIT_DEBUG
319 "OPENSSL_INIT: ossl_init_config: openssl_config(%s)\n",
320 appname == NULL ? "NULL" : appname);
322 openssl_config_int(appname);
326 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
328 #ifdef OPENSSL_INIT_DEBUG
330 "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
332 openssl_no_config_int();
337 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
338 static int async_inited = 0;
339 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
341 #ifdef OPENSSL_INIT_DEBUG
342 fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
350 #ifndef OPENSSL_NO_ENGINE
351 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
352 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
354 # ifdef OPENSSL_INIT_DEBUG
355 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
356 "engine_load_openssl_int()\n");
358 engine_load_openssl_int();
361 # ifndef OPENSSL_NO_DEVCRYPTOENG
362 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
363 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
365 # ifdef OPENSSL_INIT_DEBUG
366 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
367 "engine_load_devcrypto_int()\n");
369 engine_load_devcrypto_int();
374 # ifndef OPENSSL_NO_RDRAND
375 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
376 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
378 # ifdef OPENSSL_INIT_DEBUG
379 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
380 "engine_load_rdrand_int()\n");
382 engine_load_rdrand_int();
386 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
387 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
389 # ifdef OPENSSL_INIT_DEBUG
390 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
391 "engine_load_dynamic_int()\n");
393 engine_load_dynamic_int();
396 # ifndef OPENSSL_NO_STATIC_ENGINE
397 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
398 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
399 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
401 # ifdef OPENSSL_INIT_DEBUG
402 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
403 "engine_load_padlock_int()\n");
405 engine_load_padlock_int();
409 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
410 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
411 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
413 # ifdef OPENSSL_INIT_DEBUG
414 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
415 "engine_load_capi_int()\n");
417 engine_load_capi_int();
421 # if !defined(OPENSSL_NO_AFALGENG)
422 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
423 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
425 # ifdef OPENSSL_INIT_DEBUG
426 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
427 "engine_load_afalg_int()\n");
429 engine_load_afalg_int();
436 #ifndef OPENSSL_NO_COMP
437 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
439 static int zlib_inited = 0;
440 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
442 /* Do nothing - we need to know about this for the later cleanup */
448 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
450 /* Can't do much about this */
455 #ifdef OPENSSL_INIT_DEBUG
456 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
457 "async_delete_thread_state()\n");
459 async_delete_thread_state();
462 if (locals->err_state) {
463 #ifdef OPENSSL_INIT_DEBUG
464 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
465 "err_delete_thread_state()\n");
467 err_delete_thread_state();
471 #ifdef OPENSSL_INIT_DEBUG
472 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
473 "drbg_delete_thread_state()\n");
475 drbg_delete_thread_state();
478 OPENSSL_free(locals);
481 void OPENSSL_thread_stop(void)
483 if (destructor_key.sane != -1)
484 ossl_init_thread_stop(ossl_init_get_thread_local(0));
487 int ossl_init_thread_start(uint64_t opts)
489 struct thread_local_inits_st *locals;
491 if (!OPENSSL_init_crypto(0, NULL))
494 locals = ossl_init_get_thread_local(1);
499 if (opts & OPENSSL_INIT_THREAD_ASYNC) {
500 #ifdef OPENSSL_INIT_DEBUG
501 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
502 "marking thread for async\n");
507 if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
508 #ifdef OPENSSL_INIT_DEBUG
509 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
510 "marking thread for err_state\n");
512 locals->err_state = 1;
515 if (opts & OPENSSL_INIT_THREAD_RAND) {
516 #ifdef OPENSSL_INIT_DEBUG
517 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
518 "marking thread for rand\n");
526 void OPENSSL_cleanup(void)
528 OPENSSL_INIT_STOP *currhandler, *lasthandler;
529 CRYPTO_THREAD_LOCAL key;
531 /* If we've not been inited then no need to deinit */
535 /* Might be explicitly called and also by atexit */
541 * Thread stop may not get automatically called by the thread library for
542 * the very last thread in some situations, so call it directly.
544 ossl_init_thread_stop(ossl_init_get_thread_local(0));
546 currhandler = stop_handlers;
547 while (currhandler != NULL) {
548 currhandler->handler();
549 lasthandler = currhandler;
550 currhandler = currhandler->next;
551 OPENSSL_free(lasthandler);
553 stop_handlers = NULL;
555 CRYPTO_THREAD_lock_free(init_lock);
559 * We assume we are single-threaded for this function, i.e. no race
560 * conditions for the various "*_inited" vars below.
563 #ifndef OPENSSL_NO_COMP
565 #ifdef OPENSSL_INIT_DEBUG
566 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
567 "comp_zlib_cleanup_int()\n");
569 comp_zlib_cleanup_int();
574 # ifdef OPENSSL_INIT_DEBUG
575 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
581 if (load_crypto_strings_inited) {
582 #ifdef OPENSSL_INIT_DEBUG
583 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
584 "err_free_strings_int()\n");
586 err_free_strings_int();
589 key = destructor_key.value;
590 destructor_key.sane = -1;
591 CRYPTO_THREAD_cleanup_local(&key);
593 #ifdef OPENSSL_INIT_DEBUG
594 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
595 "rand_cleanup_int()\n");
596 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
597 "conf_modules_free_int()\n");
598 #ifndef OPENSSL_NO_ENGINE
599 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
600 "engine_cleanup_int()\n");
602 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
603 "crypto_cleanup_all_ex_data_int()\n");
604 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
605 "bio_sock_cleanup_int()\n");
606 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
608 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
609 "evp_cleanup_int()\n");
610 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
611 "obj_cleanup_int()\n");
612 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
616 * Note that cleanup order is important:
617 * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
618 * must be called before engine_cleanup_int()
619 * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
620 * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
621 * - conf_modules_free_int() can end up in ENGINE code so must be called
622 * before engine_cleanup_int()
623 * - ENGINEs and additional EVP algorithms might use added OIDs names so
624 * obj_cleanup_int() must be called last
627 rand_drbg_cleanup_int();
628 conf_modules_free_int();
629 #ifndef OPENSSL_NO_ENGINE
630 engine_cleanup_int();
632 ossl_store_cleanup_int();
633 crypto_cleanup_all_ex_data_int();
639 CRYPTO_secure_malloc_done();
645 * If this function is called with a non NULL settings value then it must be
646 * called prior to any threads making calls to any OpenSSL functions,
647 * i.e. passing a non-null settings value is assumed to be single-threaded.
649 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
652 if (!(opts & OPENSSL_INIT_BASE_ONLY))
653 CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
657 if (!RUN_ONCE(&base, ossl_init_base))
660 if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
661 if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
662 ossl_init_register_atexit))
664 } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
668 if (!(opts & OPENSSL_INIT_BASE_ONLY)
669 && !RUN_ONCE(&load_crypto_nodelete,
670 ossl_init_load_crypto_nodelete))
673 if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
674 && !RUN_ONCE_ALT(&load_crypto_strings,
675 ossl_init_no_load_crypto_strings,
676 ossl_init_load_crypto_strings))
679 if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
680 && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
683 if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
684 && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
685 ossl_init_add_all_ciphers))
688 if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
689 && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
692 if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
693 && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
694 ossl_init_add_all_digests))
697 if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
698 && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
701 if ((opts & OPENSSL_INIT_NO_ADD_ALL_MACS)
702 && !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
703 ossl_init_add_all_macs))
706 if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
707 && !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
710 if ((opts & OPENSSL_INIT_ATFORK)
711 && !openssl_init_fork_handlers())
714 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
715 && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
718 if (opts & OPENSSL_INIT_LOAD_CONFIG) {
720 CRYPTO_THREAD_write_lock(init_lock);
721 appname = (settings == NULL) ? NULL : settings->appname;
722 ret = RUN_ONCE(&config, ossl_init_config);
723 CRYPTO_THREAD_unlock(init_lock);
728 if ((opts & OPENSSL_INIT_ASYNC)
729 && !RUN_ONCE(&async, ossl_init_async))
732 #ifndef OPENSSL_NO_ENGINE
733 if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
734 && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
736 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
737 if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
738 && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
741 # ifndef OPENSSL_NO_RDRAND
742 if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
743 && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
746 if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
747 && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
749 # ifndef OPENSSL_NO_STATIC_ENGINE
750 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
751 if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
752 && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
755 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
756 if ((opts & OPENSSL_INIT_ENGINE_CAPI)
757 && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
760 # if !defined(OPENSSL_NO_AFALGENG)
761 if ((opts & OPENSSL_INIT_ENGINE_AFALG)
762 && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
766 if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
767 | OPENSSL_INIT_ENGINE_OPENSSL
768 | OPENSSL_INIT_ENGINE_AFALG)) {
769 ENGINE_register_all_complete();
773 #ifndef OPENSSL_NO_COMP
774 if ((opts & OPENSSL_INIT_ZLIB)
775 && !RUN_ONCE(&zlib, ossl_init_zlib))
782 int OPENSSL_atexit(void (*handler)(void))
784 OPENSSL_INIT_STOP *newhand;
786 #if !defined(OPENSSL_NO_DSO) \
787 && !defined(OPENSSL_USE_NODELETE)\
788 && !defined(OPENSSL_NO_PINSHARED)
795 handlersym.func = handler;
798 HMODULE handle = NULL;
802 * We don't use the DSO route for WIN32 because there is a better
805 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
806 | GET_MODULE_HANDLE_EX_FLAG_PIN,
807 handlersym.sym, &handle);
814 * Deliberately leak a reference to the handler. This will force the
815 * library/code containing the handler to remain loaded until we run the
816 * atexit handler. If -znodelete has been used then this is
823 dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
824 # ifdef OPENSSL_INIT_DEBUG
826 "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
827 (dso == NULL ? "No!" : "Yes."));
828 /* See same code above in ossl_init_base() for an explanation. */
837 if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
838 CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
842 newhand->handler = handler;
843 newhand->next = stop_handlers;
844 stop_handlers = newhand;
849 #ifdef OPENSSL_SYS_UNIX
851 * The following three functions are for OpenSSL developers. This is
852 * where we set/reset state across fork (called via pthread_atfork when
853 * it exists, or manually by the application when it doesn't).
855 * WARNING! If you put code in either OPENSSL_fork_parent or
856 * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
857 * safe. See this link, for example:
858 * http://man7.org/linux/man-pages/man7/signal-safety.7.html
861 void OPENSSL_fork_prepare(void)
865 void OPENSSL_fork_parent(void)
869 void OPENSSL_fork_child(void)