/* * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include "e_os.h" #include "internal/cryptlib_int.h" #include #include "internal/rand_int.h" #include "internal/bio.h" #include #include "internal/evp_int.h" #include "internal/conf.h" #include "internal/async.h" #include "internal/engine.h" #include "internal/comp.h" #include "internal/err.h" #include "internal/err_int.h" #include "internal/objects.h" #include #include #include "internal/thread_once.h" #include "internal/dso_conf.h" #include "internal/dso.h" #include "internal/store.h" static int stopped = 0; /* * Since per-thread-specific-data destructors are not universally * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key * is assumed to have destructor associated. And then an effort is made * to call this single destructor on non-pthread platform[s]. * * Initial value is "impossible". It is used as guard value to shortcut * destructor for threads terminating before libcrypto is initialized or * after it's de-initialized. Access to the key doesn't have to be * serialized for the said threads, because they didn't use libcrypto * and it doesn't matter if they pick "impossible" or derefernce real * key value and pull NULL past initialization in the first thread that * intends to use libcrypto. */ static union { long sane; CRYPTO_THREAD_LOCAL value; } destructor_key = { -1 }; static void ossl_init_thread_stop(struct thread_local_inits_st *locals); static void ossl_init_thread_destructor(void *local) { ossl_init_thread_stop((struct thread_local_inits_st *)local); } static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc) { struct thread_local_inits_st *local = CRYPTO_THREAD_get_local(&destructor_key.value); if (alloc) { if (local == NULL && (local = OPENSSL_zalloc(sizeof(*local))) != NULL && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) { OPENSSL_free(local); return NULL; } } else { CRYPTO_THREAD_set_local(&destructor_key.value, NULL); } return local; } typedef struct ossl_init_stop_st OPENSSL_INIT_STOP; struct ossl_init_stop_st { void (*handler)(void); OPENSSL_INIT_STOP *next; }; static OPENSSL_INIT_STOP *stop_handlers = NULL; static CRYPTO_RWLOCK *init_lock = NULL; static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT; static int base_inited = 0; DEFINE_RUN_ONCE_STATIC(ossl_init_base) { CRYPTO_THREAD_LOCAL key; #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n"); #endif #ifndef OPENSSL_NO_CRYPTO_MDEBUG ossl_malloc_setup_failures(); #endif if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor)) return 0; if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL) goto err; OPENSSL_cpuid_setup(); destructor_key.value = key; base_inited = 1; return 1; err: #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_base not ok!\n"); #endif CRYPTO_THREAD_lock_free(init_lock); init_lock = NULL; CRYPTO_THREAD_cleanup_local(&key); return 0; } static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT; #if !defined(OPENSSL_SYS_UEFI) && defined(_WIN32) static int win32atexit(void) { OPENSSL_cleanup(); return 0; } #endif DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n"); #endif #ifndef OPENSSL_SYS_UEFI # ifdef _WIN32 /* We use _onexit() in preference because it gets called on DLL unload */ if (_onexit(win32atexit) == NULL) return 0; # else if (atexit(OPENSSL_cleanup) != 0) return 0; # endif #endif return 1; } DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit, ossl_init_register_atexit) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n"); #endif /* Do nothing in this case */ return 1; } static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n"); #endif #if !defined(OPENSSL_USE_NODELETE) \ && !defined(OPENSSL_NO_PINSHARED) # if defined(DSO_WIN32) && !defined(_WIN32_WCE) { HMODULE handle = NULL; BOOL ret; /* We don't use the DSO route for WIN32 because there is a better way */ ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN, (void *)&base_inited, &handle); # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n", (ret == TRUE ? "No!" : "Yes.")); # endif return (ret == TRUE) ? 1 : 0; } # elif !defined(DSO_NONE) /* * Deliberately leak a reference to ourselves. This will force the library * to remain loaded until the atexit() handler is run at process exit. */ { DSO *dso; void *err; if (!err_shelve_state(&err)) return 0; dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE); # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n", (dso == NULL ? "No!" : "Yes.")); /* * In case of No!, it is uncertain our exit()-handlers can still be * called. After dlclose() the whole library might have been unloaded * already. */ # endif DSO_free(dso); err_unshelve_state(err); } # endif #endif return 1; } static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT; static int load_crypto_strings_inited = 0; DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings) { int ret = 1; /* * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time * pulling in all the error strings during static linking */ #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT) # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: " "err_load_crypto_strings_int()\n"); # endif ret = err_load_crypto_strings_int(); load_crypto_strings_inited = 1; #endif return ret; } DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings, ossl_init_load_crypto_strings) { /* Do nothing in this case */ return 1; } static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers) { /* * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time * pulling in all the ciphers during static linking */ #ifndef OPENSSL_NO_AUTOALGINIT # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: " "openssl_add_all_ciphers_int()\n"); # endif openssl_add_all_ciphers_int(); #endif return 1; } DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers, ossl_init_add_all_ciphers) { /* Do nothing */ return 1; } static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests) { /* * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time * pulling in all the ciphers during static linking */ #ifndef OPENSSL_NO_AUTOALGINIT # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: " "openssl_add_all_digests()\n"); # endif openssl_add_all_digests_int(); #endif return 1; } DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests, ossl_init_add_all_digests) { /* Do nothing */ return 1; } static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT; static int config_inited = 0; static const OPENSSL_INIT_SETTINGS *conf_settings = NULL; DEFINE_RUN_ONCE_STATIC(ossl_init_config) { int ret = openssl_config_int(conf_settings); config_inited = 1; return ret; } DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n"); #endif openssl_no_config_int(); config_inited = 1; return 1; } static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT; static int async_inited = 0; DEFINE_RUN_ONCE_STATIC(ossl_init_async) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n"); #endif if (!async_init()) return 0; async_inited = 1; return 1; } #ifndef OPENSSL_NO_ENGINE static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: " "engine_load_openssl_int()\n"); # endif engine_load_openssl_int(); return 1; } # ifndef OPENSSL_NO_DEVCRYPTOENG static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: " "engine_load_devcrypto_int()\n"); # endif engine_load_devcrypto_int(); return 1; } # endif # ifndef OPENSSL_NO_RDRAND static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: " "engine_load_rdrand_int()\n"); # endif engine_load_rdrand_int(); return 1; } # endif static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: " "engine_load_dynamic_int()\n"); # endif engine_load_dynamic_int(); return 1; } # ifndef OPENSSL_NO_STATIC_ENGINE # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK) static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: " "engine_load_padlock_int()\n"); # endif engine_load_padlock_int(); return 1; } # endif # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG) static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: " "engine_load_capi_int()\n"); # endif engine_load_capi_int(); return 1; } # endif # if !defined(OPENSSL_NO_AFALGENG) static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: " "engine_load_afalg_int()\n"); # endif engine_load_afalg_int(); return 1; } # endif # endif #endif #ifndef OPENSSL_NO_COMP static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT; static int zlib_inited = 0; DEFINE_RUN_ONCE_STATIC(ossl_init_zlib) { /* Do nothing - we need to know about this for the later cleanup */ zlib_inited = 1; return 1; } #endif static void ossl_init_thread_stop(struct thread_local_inits_st *locals) { /* Can't do much about this */ if (locals == NULL) return; if (locals->async) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: " "async_delete_thread_state()\n"); #endif async_delete_thread_state(); } if (locals->err_state) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: " "err_delete_thread_state()\n"); #endif err_delete_thread_state(); } if (locals->rand) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: " "drbg_delete_thread_state()\n"); #endif drbg_delete_thread_state(); } OPENSSL_free(locals); } void OPENSSL_thread_stop(void) { if (destructor_key.sane != -1) ossl_init_thread_stop(ossl_init_get_thread_local(0)); } int ossl_init_thread_start(uint64_t opts) { struct thread_local_inits_st *locals; if (!OPENSSL_init_crypto(0, NULL)) return 0; locals = ossl_init_get_thread_local(1); if (locals == NULL) return 0; if (opts & OPENSSL_INIT_THREAD_ASYNC) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: " "marking thread for async\n"); #endif locals->async = 1; } if (opts & OPENSSL_INIT_THREAD_ERR_STATE) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: " "marking thread for err_state\n"); #endif locals->err_state = 1; } if (opts & OPENSSL_INIT_THREAD_RAND) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: " "marking thread for rand\n"); #endif locals->rand = 1; } return 1; } void OPENSSL_cleanup(void) { OPENSSL_INIT_STOP *currhandler, *lasthandler; CRYPTO_THREAD_LOCAL key; /* If we've not been inited then no need to deinit */ if (!base_inited) return; /* Might be explicitly called and also by atexit */ if (stopped) return; stopped = 1; /* * Thread stop may not get automatically called by the thread library for * the very last thread in some situations, so call it directly. */ ossl_init_thread_stop(ossl_init_get_thread_local(0)); currhandler = stop_handlers; while (currhandler != NULL) { currhandler->handler(); lasthandler = currhandler; currhandler = currhandler->next; OPENSSL_free(lasthandler); } stop_handlers = NULL; CRYPTO_THREAD_lock_free(init_lock); init_lock = NULL; /* * We assume we are single-threaded for this function, i.e. no race * conditions for the various "*_inited" vars below. */ #ifndef OPENSSL_NO_COMP if (zlib_inited) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "comp_zlib_cleanup_int()\n"); #endif comp_zlib_cleanup_int(); } #endif if (async_inited) { # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "async_deinit()\n"); # endif async_deinit(); } if (load_crypto_strings_inited) { #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "err_free_strings_int()\n"); #endif err_free_strings_int(); } key = destructor_key.value; destructor_key.sane = -1; CRYPTO_THREAD_cleanup_local(&key); #ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "rand_cleanup_int()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "conf_modules_free_int()\n"); #ifndef OPENSSL_NO_ENGINE fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "engine_cleanup_int()\n"); #endif fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "crypto_cleanup_all_ex_data_int()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "bio_sock_cleanup_int()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "bio_cleanup()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "evp_cleanup_int()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "obj_cleanup_int()\n"); fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: " "err_cleanup()\n"); #endif /* * Note that cleanup order is important: * - rand_cleanup_int could call an ENGINE's RAND cleanup function so * must be called before engine_cleanup_int() * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data(). * - conf_modules_free_int() can end up in ENGINE code so must be called * before engine_cleanup_int() * - ENGINEs and additional EVP algorithms might use added OIDs names so * obj_cleanup_int() must be called last */ rand_cleanup_int(); rand_drbg_cleanup_int(); conf_modules_free_int(); #ifndef OPENSSL_NO_ENGINE engine_cleanup_int(); #endif ossl_store_cleanup_int(); crypto_cleanup_all_ex_data_int(); bio_cleanup(); evp_cleanup_int(); obj_cleanup_int(); err_cleanup(); CRYPTO_secure_malloc_done(); base_inited = 0; } /* * If this function is called with a non NULL settings value then it must be * called prior to any threads making calls to any OpenSSL functions, * i.e. passing a non-null settings value is assumed to be single-threaded. */ int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) { if (stopped) { if (!(opts & OPENSSL_INIT_BASE_ONLY)) CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL); return 0; } /* * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the * *only* option specified. With that option we return immediately after * doing the requested limited initialization. Note that * err_shelve_state() called by us via ossl_init_load_crypto_nodelete() * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with * base already initialized this is a harmless NOOP. * * If we remain the only caller of err_shelve_state() the recursion should * perhaps be removed, but if in doubt, it can be left in place. */ if (!RUN_ONCE(&base, ossl_init_base)) return 0; if (opts & OPENSSL_INIT_BASE_ONLY) return 1; /* * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls * should not have the side-effect of setting up exit handlers, and * therefore, this code block is below the INIT_BASE_ONLY-conditioned early * return above. */ if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) { if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit, ossl_init_register_atexit)) return 0; } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) { return 0; } if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete)) return 0; if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS) && !RUN_ONCE_ALT(&load_crypto_strings, ossl_init_no_load_crypto_strings, ossl_init_load_crypto_strings)) return 0; if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS) && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings)) return 0; if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS) && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers, ossl_init_add_all_ciphers)) return 0; if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS) && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers)) return 0; if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS) && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests, ossl_init_add_all_digests)) return 0; if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS) && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests)) return 0; if ((opts & OPENSSL_INIT_ATFORK) && !openssl_init_fork_handlers()) return 0; if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config)) return 0; if (opts & OPENSSL_INIT_LOAD_CONFIG) { int ret; CRYPTO_THREAD_write_lock(init_lock); conf_settings = settings; ret = RUN_ONCE(&config, ossl_init_config); conf_settings = NULL; CRYPTO_THREAD_unlock(init_lock); if (ret <= 0) return 0; } if ((opts & OPENSSL_INIT_ASYNC) && !RUN_ONCE(&async, ossl_init_async)) return 0; #ifndef OPENSSL_NO_ENGINE if ((opts & OPENSSL_INIT_ENGINE_OPENSSL) && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl)) return 0; # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG) if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV) && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto)) return 0; # endif # ifndef OPENSSL_NO_RDRAND if ((opts & OPENSSL_INIT_ENGINE_RDRAND) && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand)) return 0; # endif if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC) && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic)) return 0; # ifndef OPENSSL_NO_STATIC_ENGINE # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK) if ((opts & OPENSSL_INIT_ENGINE_PADLOCK) && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock)) return 0; # endif # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG) if ((opts & OPENSSL_INIT_ENGINE_CAPI) && !RUN_ONCE(&engine_capi, ossl_init_engine_capi)) return 0; # endif # if !defined(OPENSSL_NO_AFALGENG) if ((opts & OPENSSL_INIT_ENGINE_AFALG) && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg)) return 0; # endif # endif if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN | OPENSSL_INIT_ENGINE_OPENSSL | OPENSSL_INIT_ENGINE_AFALG)) { ENGINE_register_all_complete(); } #endif #ifndef OPENSSL_NO_COMP if ((opts & OPENSSL_INIT_ZLIB) && !RUN_ONCE(&zlib, ossl_init_zlib)) return 0; #endif return 1; } int OPENSSL_atexit(void (*handler)(void)) { OPENSSL_INIT_STOP *newhand; #if !defined(OPENSSL_USE_NODELETE)\ && !defined(OPENSSL_NO_PINSHARED) { union { void *sym; void (*func)(void); } handlersym; handlersym.func = handler; # if defined(DSO_WIN32) && !defined(_WIN32_WCE) { HMODULE handle = NULL; BOOL ret; /* * We don't use the DSO route for WIN32 because there is a better * way */ ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN, handlersym.sym, &handle); if (!ret) return 0; } # elif !defined(DSO_NONE) /* * Deliberately leak a reference to the handler. This will force the * library/code containing the handler to remain loaded until we run the * atexit handler. If -znodelete has been used then this is * unnecessary. */ { DSO *dso = NULL; ERR_set_mark(); dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE); # ifdef OPENSSL_INIT_DEBUG fprintf(stderr, "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n", (dso == NULL ? "No!" : "Yes.")); /* See same code above in ossl_init_base() for an explanation. */ # endif DSO_free(dso); ERR_pop_to_mark(); } # endif } #endif if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) { CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE); return 0; } newhand->handler = handler; newhand->next = stop_handlers; stop_handlers = newhand; return 1; } #ifdef OPENSSL_SYS_UNIX /* * The following three functions are for OpenSSL developers. This is * where we set/reset state across fork (called via pthread_atfork when * it exists, or manually by the application when it doesn't). * * WARNING! If you put code in either OPENSSL_fork_parent or * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal- * safe. See this link, for example: * http://man7.org/linux/man-pages/man7/signal-safety.7.html */ void OPENSSL_fork_prepare(void) { } void OPENSSL_fork_parent(void) { } void OPENSSL_fork_child(void) { rand_fork(); } #endif