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openssl/crypto/init.c
Matt Caswell 6bc7bad011 Fix windows thread stop code 
The windows thread stop code was erroneously not just deleting the thread
local variable on thread stop, but also deleting the thread local *key*
(thus removing thread local data for *all* threads in one go!).

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-18 15:27:16 +00:00

741 lines
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/*
* Written by Matt Caswell for the OpenSSL project.
*/
/* ====================================================================
* Copyright (c) 2016 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <internal/cryptlib_int.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/evp.h>
#include <internal/evp_int.h>
#include <internal/conf.h>
#include <internal/async.h>
#ifndef OPENSSL_NO_ENGINE
#include <internal/engine.h>
#endif
#include <openssl/comp.h>
#include <internal/err.h>
#include <stdlib.h>
#include <assert.h>
static int stopped = 0;
static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
/* Implement "once" functionality */
#if !defined(OPENSSL_THREADS)
typedef int OPENSSL_INIT_ONCE;
# define OPENSSL_INIT_ONCE_STATIC_INIT 0
static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
{
if (*once == OPENSSL_INIT_ONCE_STATIC_INIT) {
*once = 1;
init();
}
}
static int ossl_init_setup_thread_stop(void)
{
/*
* There are no threads to stop. Do nothing.
*/
return 1;
}
static void ossl_init_thread_stop_cleanup(void)
{
}
static struct thread_local_inits_st *local = NULL;
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
{
struct thread_local_inits_st *tmp;
tmp = local;
if (local == NULL && alloc)
tmp = local = OPENSSL_zalloc(sizeof(*local));
if (!alloc)
local = NULL;
return tmp;
}
#elif defined(OPENSSL_SYS_WINDOWS)
# include <windows.h>
# if _WIN32_WINNT < 0x0600
/*
* Versions before 0x0600 (Windows Vista, Windows Server 2008 or later) do not
* have InitOnceExecuteOnce, so we fall back to using a spinlock instead.
*/
typedef LONG OPENSSL_INIT_ONCE;
# define OPENSSL_INIT_ONCE_STATIC_INIT 0
# define ONCE_UNINITED 0
# define ONCE_ININIT 1
# define ONCE_DONE 2
static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
{
LONG volatile *lock = (LONG *)once;
LONG result;
if (*lock == ONCE_DONE)
return;
do {
result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
if (result == ONCE_UNINITED) {
init();
*lock = ONCE_DONE;
return;
}
} while (result == ONCE_ININIT);
}
# else
typedef INIT_ONCE OPENSSL_INIT_ONCE;
# define OPENSSL_INIT_ONCE_STATIC_INIT INIT_ONCE_STATIC_INIT
static BOOL CALLBACK once_cb(PINIT_ONCE once, PVOID initfp, PVOID *unused)
{
void (*init)(void) = initfp;
init();
return TRUE;
}
static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
{
InitOnceExecuteOnce((INIT_ONCE *)once, once_cb, init, NULL);
}
# endif
static DWORD threadstopkey = TLS_OUT_OF_INDEXES;
static int ossl_init_setup_thread_stop(void)
{
/*
* We use a dummy thread local key here. We use the destructor to detect
* when the thread is going to stop
*/
threadstopkey = TlsAlloc();
if (threadstopkey == TLS_OUT_OF_INDEXES)
return 0;
return 1;
}
static void ossl_init_thread_stop_cleanup(void)
{
if (threadstopkey != TLS_OUT_OF_INDEXES) {
TlsFree(threadstopkey);
}
}
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
{
struct thread_local_inits_st *local = TlsGetValue(threadstopkey);
if (local == NULL && alloc) {
local = OPENSSL_zalloc(sizeof *local);
TlsSetValue(threadstopkey, local);
}
if (!alloc) {
TlsSetValue(threadstopkey, NULL);
}
return local;
}
#else /* pthreads */
# include <pthread.h>
static pthread_key_t threadstopkey;
typedef pthread_once_t OPENSSL_INIT_ONCE;
# define OPENSSL_INIT_ONCE_STATIC_INIT PTHREAD_ONCE_INIT
static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
{
pthread_once(once, init);
}
static void ossl_init_thread_stop_wrap(void *local)
{
ossl_init_thread_stop((struct thread_local_inits_st *)local);
}
static int ossl_init_setup_thread_stop(void)
{
/*
* We use a dummy thread local key here. We use the destructor to detect
* when the thread is going to stop
*/
return (pthread_key_create(&threadstopkey,
ossl_init_thread_stop_wrap) == 0);
}
static void ossl_init_thread_stop_cleanup(void)
{
}
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
{
struct thread_local_inits_st *local = pthread_getspecific(threadstopkey);
if (local == NULL && alloc) {
local = OPENSSL_zalloc(sizeof *local);
pthread_setspecific(threadstopkey, local);
}
if (!alloc) {
pthread_setspecific(threadstopkey, NULL);
}
return local;
}
#endif
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 OPENSSL_INIT_ONCE base = OPENSSL_INIT_ONCE_STATIC_INIT;
static int base_inited = 0;
static void ossl_init_base(void)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
#endif
ossl_init_setup_thread_stop();
#ifndef OPENSSL_SYS_UEFI
atexit(OPENSSL_cleanup);
#endif
OPENSSL_cpuid_setup();
base_inited = 1;
}
static OPENSSL_INIT_ONCE load_crypto_strings = OPENSSL_INIT_ONCE_STATIC_INIT;
static int load_crypto_strings_inited = 0;
static void ossl_init_no_load_crypto_strings(void)
{
/* Do nothing in this case */
return;
}
static void ossl_init_load_crypto_strings(void)
{
/*
* 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_intern()\n");
# endif
err_load_crypto_strings_intern();
#endif
load_crypto_strings_inited = 1;
}
static OPENSSL_INIT_ONCE add_all_ciphers = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_add_all_ciphers(void)
{
/*
* 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_internal()\n");
# endif
openssl_add_all_ciphers_internal();
# ifndef OPENSSL_NO_ENGINE
# if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
ENGINE_setup_bsd_cryptodev();
# endif
# endif
#endif
}
static OPENSSL_INIT_ONCE add_all_digests = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_add_all_digests(void)
{
/*
* 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_internal()\n");
# endif
openssl_add_all_digests_internal();
# ifndef OPENSSL_NO_ENGINE
# if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
ENGINE_setup_bsd_cryptodev();
# endif
# endif
#endif
}
static void ossl_init_no_add_algs(void)
{
/* Do nothing */
return;
}
static OPENSSL_INIT_ONCE config = OPENSSL_INIT_ONCE_STATIC_INIT;
static int config_inited = 0;
static const char *config_filename;
static void ossl_init_config(void)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr,
"OPENSSL_INIT: ossl_init_config: openssl_config_internal(%s)\n",
config_filename==NULL?"NULL":config_filename);
#endif
openssl_config_internal(config_filename);
config_inited = 1;
}
static void ossl_init_no_config(void)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr,
"OPENSSL_INIT: ossl_init_config: openssl_no_config_internal()\n");
#endif
openssl_no_config_internal();
config_inited = 1;
}
#ifndef OPENSSL_NO_ASYNC
static OPENSSL_INIT_ONCE async = OPENSSL_INIT_ONCE_STATIC_INIT;
static int async_inited = 0;
static void ossl_init_async(void)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
#endif
async_init();
async_inited = 1;
}
#endif
#ifndef OPENSSL_NO_ENGINE
static int engine_inited = 0;
static OPENSSL_INIT_ONCE engine_openssl = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_openssl(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
"engine_load_openssl_internal()\n");
# endif
engine_load_openssl_internal();
engine_inited = 1;
}
# if !defined(OPENSSL_NO_HW) && \
(defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
static OPENSSL_INIT_ONCE engine_cryptodev = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_cryptodev(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_cryptodev: "
"engine_load_cryptodev_internal()\n");
# endif
engine_load_cryptodev_internal();
engine_inited = 1;
}
# endif
# ifndef OPENSSL_NO_RDRAND
static OPENSSL_INIT_ONCE engine_rdrand = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_rdrand(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
"engine_load_rdrand_internal()\n");
# endif
engine_load_rdrand_internal();
engine_inited = 1;
}
# endif
static OPENSSL_INIT_ONCE engine_dynamic = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_dynamic(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
"engine_load_dynamic_internal()\n");
# endif
engine_load_dynamic_internal();
engine_inited = 1;
}
# ifndef OPENSSL_NO_STATIC_ENGINE
# if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
static OPENSSL_INIT_ONCE engine_padlock = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_padlock(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
"engine_load_padlock_internal()\n");
# endif
engine_load_padlock_internal();
engine_inited = 1;
}
# endif
# if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
static OPENSSL_INIT_ONCE engine_capi = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_capi(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
"engine_load_capi_internal()\n");
# endif
engine_load_capi_internal();
engine_inited = 1;
}
# endif
static OPENSSL_INIT_ONCE engine_dasync = OPENSSL_INIT_ONCE_STATIC_INIT;
static void ossl_init_engine_dasync(void)
{
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dasync: "
"engine_load_dasync_internal()\n");
# endif
engine_load_dasync_internal();
engine_inited = 1;
}
# endif
#endif
static OPENSSL_INIT_ONCE zlib = OPENSSL_INIT_ONCE_STATIC_INIT;
static int zlib_inited = 0;
static void ossl_init_zlib(void)
{
/* Do nothing - we need to know about this for the later cleanup */
zlib_inited = 1;
}
static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
{
/* Can't do much about this */
if (locals == NULL)
return;
#ifndef OPENSSL_NO_ASYNC
if (locals->async) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
"ASYNC_cleanup_thread()\n");
#endif
ASYNC_cleanup_thread();
}
#endif
if (locals->err_state) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
"ERR_remove_thread_state(NULL)\n");
#endif
ERR_remove_thread_state(NULL);
}
OPENSSL_free(locals);
}
void OPENSSL_thread_stop(void)
{
ossl_init_thread_stop(
(struct thread_local_inits_st *)ossl_init_get_thread_local(0));
}
int ossl_init_thread_start(uint64_t opts)
{
struct thread_local_inits_st *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;
}
return 1;
}
void OPENSSL_cleanup(void)
{
OPENSSL_INIT_STOP *currhandler, *lasthandler;
/* 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;
/*
* We assume we are single-threaded for this function, i.e. no race
* conditions for the various "*_inited" vars below.
*/
if (zlib_inited) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
"COMP_zlib_cleanup()\n");
#endif
COMP_zlib_cleanup();
}
#ifndef OPENSSL_NO_ENGINE
if (engine_inited) {
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
"ENGINE_cleanup()\n");
# endif
ENGINE_cleanup();
}
#endif
if (load_crypto_strings_inited) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
"ERR_free_strings()\n");
#endif
ERR_free_strings();
}
ossl_init_thread_stop_cleanup();
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
"CRYPTO_cleanup_all_ex_data()\n");
fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
"EVP_cleanup()\n");
fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
"CONF_modules_free()\n");
fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
"RAND_cleanup()\n");
#endif
CRYPTO_cleanup_all_ex_data();
EVP_cleanup();
CONF_modules_free();
RAND_cleanup();
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)
{
static int stoperrset = 0;
if (stopped) {
if (!stoperrset) {
/*
* We only ever set this once to avoid getting into an infinite
* loop where the error system keeps trying to init and fails so
* sets an error etc
*/
stoperrset = 1;
CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
}
return 0;
}
ossl_init_once_run(&base, ossl_init_base);
if (opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
ossl_init_once_run(&load_crypto_strings,
ossl_init_no_load_crypto_strings);
if (opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
ossl_init_once_run(&load_crypto_strings, ossl_init_load_crypto_strings);
if (opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
ossl_init_once_run(&add_all_ciphers, ossl_init_no_add_algs);
if (opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
ossl_init_once_run(&add_all_ciphers, ossl_init_add_all_ciphers);
if (opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
ossl_init_once_run(&add_all_digests, ossl_init_no_add_algs);
if (opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
ossl_init_once_run(&add_all_digests, ossl_init_add_all_digests);
if (opts & OPENSSL_INIT_NO_LOAD_CONFIG) {
ossl_init_once_run(&config, ossl_init_no_config);
}
if (opts & OPENSSL_INIT_LOAD_CONFIG) {
CRYPTO_w_lock(CRYPTO_LOCK_INIT);
config_filename = (settings == NULL) ? NULL : settings->config_name;
ossl_init_once_run(&config, ossl_init_config);
CRYPTO_w_unlock(CRYPTO_LOCK_INIT);
}
#ifndef OPENSSL_NO_ASYNC
if (opts & OPENSSL_INIT_ASYNC) {
ossl_init_once_run(&async, ossl_init_async);
}
#endif
#ifndef OPENSSL_NO_ENGINE
if (opts & OPENSSL_INIT_ENGINE_OPENSSL) {
ossl_init_once_run(&engine_openssl, ossl_init_engine_openssl);
}
# if !defined(OPENSSL_NO_HW) && \
(defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
if (opts & OPENSSL_INIT_ENGINE_CRYPTODEV) {
ossl_init_once_run(&engine_cryptodev, ossl_init_engine_cryptodev);
}
# endif
# ifndef OPENSSL_NO_RDRAND
if (opts & OPENSSL_INIT_ENGINE_RDRAND) {
ossl_init_once_run(&engine_rdrand, ossl_init_engine_rdrand);
}
# endif
if (opts & OPENSSL_INIT_ENGINE_DYNAMIC) {
ossl_init_once_run(&engine_dynamic, ossl_init_engine_dynamic);
}
# ifndef OPENSSL_NO_STATIC_ENGINE
# if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
if (opts & OPENSSL_INIT_ENGINE_PADLOCK) {
ossl_init_once_run(&engine_padlock, ossl_init_engine_padlock);
}
# endif
# if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
if (opts & OPENSSL_INIT_ENGINE_CAPI) {
ossl_init_once_run(&engine_capi, ossl_init_engine_capi);
}
# endif
if (opts & OPENSSL_INIT_ENGINE_DASYNC) {
ossl_init_once_run(&engine_dasync, ossl_init_engine_dasync);
}
# endif
if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
| OPENSSL_INIT_ENGINE_DASYNC | OPENSSL_INIT_ENGINE_OPENSSL)) {
ENGINE_register_all_complete();
}
#endif
if (opts & OPENSSL_INIT_ZLIB) {
ossl_init_once_run(&zlib, ossl_init_zlib);
}
return 1;
}
int OPENSSL_atexit(void (*handler)(void))
{
OPENSSL_INIT_STOP *newhand;
newhand = OPENSSL_malloc(sizeof(*newhand));
if (newhand == NULL)
return 0;
newhand->handler = handler;
newhand->next = stop_handlers;
stop_handlers = newhand;
return 1;
}
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