mirror of https://github.com/openssl/openssl.git
143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/*
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* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "e_os.h"
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#include "internal/err.h"
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#include <openssl/crypto.h>
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#include <openssl/evp.h>
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#include <openssl/trace.h>
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#include "ssl_local.h"
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#include "internal/thread_once.h"
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static int stopped;
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static void ssl_library_stop(void);
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static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
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static int ssl_base_inited = 0;
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DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)
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{
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#ifndef OPENSSL_NO_COMP
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OSSL_TRACE(INIT, "ossl_init_ssl_base: "
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"SSL_COMP_get_compression_methods()\n");
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/*
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* This will initialise the built-in compression algorithms. The value
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* returned is a STACK_OF(SSL_COMP), but that can be discarded safely
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*/
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SSL_COMP_get_compression_methods();
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#endif
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ssl_sort_cipher_list();
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OSSL_TRACE(INIT,"ossl_init_ssl_base: SSL_add_ssl_module()\n");
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/*
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* We ignore an error return here. Not much we can do - but not that bad
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* either. We can still safely continue.
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*/
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OPENSSL_atexit(ssl_library_stop);
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ssl_base_inited = 1;
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return 1;
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}
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static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
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static int ssl_strings_inited = 0;
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DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)
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{
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/*
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* OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
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* pulling in all the error strings during static linking
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*/
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#if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
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OSSL_TRACE(INIT, "ossl_init_load_ssl_strings: ERR_load_SSL_strings()\n");
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ERR_load_SSL_strings();
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ssl_strings_inited = 1;
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#endif
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return 1;
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}
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DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_ssl_strings,
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ossl_init_load_ssl_strings)
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{
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/* Do nothing in this case */
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return 1;
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}
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static void ssl_library_stop(void)
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{
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/* Might be explicitly called and also by atexit */
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if (stopped)
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return;
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stopped = 1;
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if (ssl_base_inited) {
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#ifndef OPENSSL_NO_COMP
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OSSL_TRACE(INIT, "ssl_library_stop: "
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"ssl_comp_free_compression_methods_int()\n");
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ssl_comp_free_compression_methods_int();
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#endif
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}
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if (ssl_strings_inited) {
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OSSL_TRACE(INIT, "ssl_library_stop: err_free_strings_int()\n");
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/*
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* If both crypto and ssl error strings are inited we will end up
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* calling err_free_strings_int() twice - but that's ok. The second
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* time will be a no-op. It's easier to do that than to try and track
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* between the two libraries whether they have both been inited.
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*/
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err_free_strings_int();
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}
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}
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/*
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* If this function is called with a non NULL settings value then it must be
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* called prior to any threads making calls to any OpenSSL functions,
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* i.e. passing a non-null settings value is assumed to be single-threaded.
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*/
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int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS * settings)
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{
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static int stoperrset = 0;
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if (stopped) {
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if (!stoperrset) {
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/*
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* We only ever set this once to avoid getting into an infinite
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* loop where the error system keeps trying to init and fails so
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* sets an error etc
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*/
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stoperrset = 1;
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SSLerr(SSL_F_OPENSSL_INIT_SSL, ERR_R_INIT_FAIL);
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}
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return 0;
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}
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opts |= OPENSSL_INIT_ADD_ALL_CIPHERS
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| OPENSSL_INIT_ADD_ALL_DIGESTS;
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#ifndef OPENSSL_NO_AUTOLOAD_CONFIG
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if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) == 0)
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opts |= OPENSSL_INIT_LOAD_CONFIG;
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#endif
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if (!OPENSSL_init_crypto(opts, settings))
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return 0;
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if (!RUN_ONCE(&ssl_base, ossl_init_ssl_base))
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return 0;
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if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
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&& !RUN_ONCE_ALT(&ssl_strings, ossl_init_no_load_ssl_strings,
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ossl_init_load_ssl_strings))
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return 0;
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if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
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&& !RUN_ONCE(&ssl_strings, ossl_init_load_ssl_strings))
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return 0;
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return 1;
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}
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