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openssl/ssl/ssl_init.c

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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 "e_os.h"
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <assert.h>
#include "ssl_locl.h"
static int stopped;
/* 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();
}
}
#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
#else /* pthreads */
# include <pthread.h>
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);
}
#endif
static void ssl_library_stop(void);
static OPENSSL_INIT_ONCE ssl_base = OPENSSL_INIT_ONCE_STATIC_INIT;
static int ssl_base_inited = 0;
static void ossl_init_ssl_base(void)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
"Adding SSL ciphers and digests\n");
#endif
#ifndef OPENSSL_NO_DES
EVP_add_cipher(EVP_des_cbc());
EVP_add_cipher(EVP_des_ede3_cbc());
#endif
#ifndef OPENSSL_NO_IDEA
EVP_add_cipher(EVP_idea_cbc());
#endif
#ifndef OPENSSL_NO_RC4
EVP_add_cipher(EVP_rc4());
# ifndef OPENSSL_NO_MD5
EVP_add_cipher(EVP_rc4_hmac_md5());
# endif
#endif
#ifndef OPENSSL_NO_RC2
EVP_add_cipher(EVP_rc2_cbc());
/*
* Not actually used for SSL/TLS but this makes PKCS#12 work if an
* application only calls SSL_library_init().
*/
EVP_add_cipher(EVP_rc2_40_cbc());
#endif
#ifndef OPENSSL_NO_AES
EVP_add_cipher(EVP_aes_128_cbc());
EVP_add_cipher(EVP_aes_192_cbc());
EVP_add_cipher(EVP_aes_256_cbc());
EVP_add_cipher(EVP_aes_128_gcm());
EVP_add_cipher(EVP_aes_256_gcm());
EVP_add_cipher(EVP_aes_128_ccm());
EVP_add_cipher(EVP_aes_256_ccm());
EVP_add_cipher(EVP_aes_128_cbc_hmac_sha1());
EVP_add_cipher(EVP_aes_256_cbc_hmac_sha1());
EVP_add_cipher(EVP_aes_128_cbc_hmac_sha256());
EVP_add_cipher(EVP_aes_256_cbc_hmac_sha256());
#endif
#ifndef OPENSSL_NO_CAMELLIA
EVP_add_cipher(EVP_camellia_128_cbc());
EVP_add_cipher(EVP_camellia_256_cbc());
#endif
#if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
EVP_add_cipher(EVP_chacha20_poly1305());
#endif
#ifndef OPENSSL_NO_SEED
EVP_add_cipher(EVP_seed_cbc());
#endif
#ifndef OPENSSL_NO_MD5
EVP_add_digest(EVP_md5());
EVP_add_digest_alias(SN_md5, "ssl3-md5");
# ifndef OPENSSL_NO_SHA
EVP_add_digest(EVP_md5_sha1());
# endif
#endif
EVP_add_digest(EVP_sha1()); /* RSA with sha1 */
EVP_add_digest_alias(SN_sha1, "ssl3-sha1");
EVP_add_digest_alias(SN_sha1WithRSAEncryption, SN_sha1WithRSA);
EVP_add_digest(EVP_sha224());
EVP_add_digest(EVP_sha256());
EVP_add_digest(EVP_sha384());
EVP_add_digest(EVP_sha512());
#ifndef OPENSSL_NO_COMP
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
"SSL_COMP_get_compression_methods()\n");
#endif
/*
* 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
/* initialize cipher/digest methods table */
ssl_load_ciphers();
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_ssl_base: "
"SSL_add_ssl_module()\n");
#endif
SSL_add_ssl_module();
/*
* 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;
}
static OPENSSL_INIT_ONCE ssl_strings = OPENSSL_INIT_ONCE_STATIC_INIT;
static int ssl_strings_inited = 0;
static void ossl_init_load_ssl_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_ssl_strings: "
"ERR_load_SSL_strings()\n");
# endif
ERR_load_SSL_strings();
#endif
ssl_strings_inited = 1;
}
static void ossl_init_no_load_ssl_strings(void)
{
/* Do nothing in this case */
return;
}
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
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
"SSL_COMP_free_compression_methods()\n");
#endif
SSL_COMP_free_compression_methods();
#endif
}
if (ssl_strings_inited) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ssl_library_stop: "
"ERR_free_strings()\n");
#endif
/*
* If both crypto and ssl error strings are inited we will end up
* calling ERR_free_strings() 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();
}
}
/*
* 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;
SSLerr(SSL_F_OPENSSL_INIT_SSL, ERR_R_INIT_FAIL);
}
return 0;
}
if (!OPENSSL_init_crypto(opts | OPENSSL_INIT_ADD_ALL_CIPHERS
| OPENSSL_INIT_ADD_ALL_DIGESTS, settings))
return 0;
ossl_init_once_run(&ssl_base, ossl_init_ssl_base);
if (opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
ossl_init_once_run(&ssl_strings, ossl_init_no_load_ssl_strings);
if (opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
ossl_init_once_run(&ssl_strings, ossl_init_load_ssl_strings);
return 1;
}
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