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openssl/crypto/init.c
Viktor Dukhovni df1f538f28 More configurable crypto and ssl library initialization 
1.  In addition to overriding the default application name,
    one can now also override the configuration file name
    and flags passed to CONF_modules_load_file().

2.  By default we still keep going when configuration file
    processing fails.  But, applications that want to be strict
    about initialization errors can now make explicit flag
    choices via non-null OPENSSL_INIT_SETTINGS that omit the
    CONF_MFLAGS_IGNORE_RETURN_CODES flag (which had so far been
    both undocumented and unused).

3.  In OPENSSL_init_ssl() do not request OPENSSL_INIT_LOAD_CONFIG
    if the options already include OPENSSL_INIT_NO_LOAD_CONFIG.

4.  Don't set up atexit() handlers when called with INIT_BASE_ONLY.

Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7986)
2019-01-07 14:02:28 -05:00

887 lines
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/*
* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <openssl/err.h>
#include "internal/rand_int.h"
#include "internal/bio.h"
#include <openssl/evp.h>
#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 <stdlib.h>
#include <assert.h>
#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_NO_DSO) \
&& !defined(OPENSSL_USE_NODELETE) \
&& !defined(OPENSSL_NO_PINSHARED)
# ifdef DSO_WIN32
{
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;
}
# else
/*
* 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 add_all_macs = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_macs)
{
/*
* OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
* pulling in all the macs during static linking
*/
#ifndef OPENSSL_NO_AUTOALGINIT
# ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_macs: "
"openssl_add_all_macs_int()\n");
# endif
openssl_add_all_macs_int();
#endif
return 1;
}
DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_macs, ossl_init_add_all_macs)
{
/* 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(&register_atexit, ossl_init_no_register_atexit,
ossl_init_register_atexit))
return 0;
} else if (!RUN_ONCE(&register_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_NO_ADD_ALL_MACS)
&& !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
ossl_init_add_all_macs))
return 0;
if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
&& !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
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)
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_NO_DSO) \
&& !defined(OPENSSL_USE_NODELETE)\
&& !defined(OPENSSL_NO_PINSHARED)
{
union {
void *sym;
void (*func)(void);
} handlersym;
handlersym.func = handler;
# ifdef DSO_WIN32
{
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;
}
# else
/*
* 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
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