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/*
* Copyright 2016-2021 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 "internal/e_os.h"
#include "internal/err.h"
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/trace.h>
#include "ssl_local.h"
#include "sslerr.h"
#include "internal/thread_once.h"
static int stopped;
static void ssl_library_stop(void);
static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
static int ssl_base_inited = 0;
DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)
{
#ifndef OPENSSL_NO_COMP
OSSL_TRACE(INIT, "ossl_init_ssl_base: "
"SSL_COMP_get_compression_methods()\n");
/*
* This will initialise the built-in compression algorithms. The value
* returned is a STACK_OF(SSL_COMP), but that can be discarded safely
*/
SSL_COMP_get_compression_methods();
#endif
ssl_sort_cipher_list();
OSSL_TRACE(INIT, "ossl_init_ssl_base: SSL_add_ssl_module()\n");
/*
* We ignore an error return here. Not much we can do - but not that bad
* either. We can still safely continue.
*/
OPENSSL_atexit(ssl_library_stop);
ssl_base_inited = 1;
return 1;
}
static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
static int ssl_strings_inited = 0;
DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)
{
/*
* 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)
OSSL_TRACE(INIT, "ossl_init_load_ssl_strings: ossl_err_load_SSL_strings()\n");
ossl_err_load_SSL_strings();
ssl_strings_inited = 1;
#endif
return 1;
}
DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_ssl_strings,
ossl_init_load_ssl_strings)
{
/* Do nothing in this case */
return 1;
}
static void ssl_library_stop(void)
{
/* Might be explicitly called and also by atexit */
if (stopped)
return;
stopped = 1;
if (ssl_base_inited) {
#ifndef OPENSSL_NO_COMP
OSSL_TRACE(INIT, "ssl_library_stop: "
"ssl_comp_free_compression_methods_int()\n");
ssl_comp_free_compression_methods_int();
#endif
}
if (ssl_strings_inited) {
OSSL_TRACE(INIT, "ssl_library_stop: err_free_strings_int()\n");
/*
* If both crypto and ssl error strings are inited we will end up
* calling err_free_strings_int() twice - but that's ok. The second
* time will be a no-op. It's easier to do that than to try and track
* between the two libraries whether they have both been inited.
*/
err_free_strings_int();
}
}
/*
* 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_ssl(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;
ERR_raise(ERR_LIB_SSL, ERR_R_INIT_FAIL);
}
return 0;
}
opts |= OPENSSL_INIT_ADD_ALL_CIPHERS
| OPENSSL_INIT_ADD_ALL_DIGESTS;
#ifndef OPENSSL_NO_AUTOLOAD_CONFIG
if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) == 0)
opts |= OPENSSL_INIT_LOAD_CONFIG;
#endif
if (!OPENSSL_init_crypto(opts, settings))
return 0;
if (!RUN_ONCE(&ssl_base, ossl_init_ssl_base))
return 0;
if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
&& !RUN_ONCE_ALT(&ssl_strings, ossl_init_no_load_ssl_strings,
ossl_init_load_ssl_strings))
return 0;
if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
&& !RUN_ONCE(&ssl_strings, ossl_init_load_ssl_strings))
return 0;
return 1;
}
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