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openssl/crypto/init.c

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Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
/*
* 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>
Fixes to make no-deprecated work again Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-14 20:25:54 +00:00
#include <openssl/rand.h>
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
#include <openssl/evp.h>
#include <internal/evp_int.h>
#include <internal/conf.h>
#include <internal/async.h>
#include <internal/engine.h>
#include <openssl/comp.h>
#include <internal/err.h>
#include <stdlib.h>
Can't re-init after stop. Remoce DYANMIC once-init stuff. After the library is stopped, you can't restart it. Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-10 05:39:29 +00:00
#include <assert.h>
static int stopped = 0;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
Provide a thread stop API Add the OPENSSL_INIT_thread_stop() function. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 09:13:45 +00:00
static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
/* 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;
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
Variable was declared static when it shouldn't be The local variable tmp was declared static when it shouldn't be. This is in the no-threads implementation, and it was immediately initialised to something else on every invokation of the function so it doesn't break anything...but still shouldn't be there. Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2016-02-10 16:46:33 +00:00
struct thread_local_inits_st *tmp;
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
tmp = local;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
if (local == NULL && alloc)
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
tmp = local = OPENSSL_zalloc(sizeof(*local));
if (!alloc)
local = NULL;
return tmp;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
}
#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
Make some global variables static Make some global variables that are only ever accessed from one file static. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:59:17 +00:00
static DWORD threadstopkey = TLS_OUT_OF_INDEXES;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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);
}
}
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
struct thread_local_inits_st *local = TlsGetValue(threadstopkey);
if (local == NULL && alloc) {
local = OPENSSL_zalloc(sizeof *local);
TlsSetValue(threadstopkey, local);
}
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
if (!alloc) {
TlsSetValue(threadstopkey, NULL);
}
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
return local;
}
#else /* pthreads */
# include <pthread.h>
Make some global variables static Make some global variables that are only ever accessed from one file static. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:59:17 +00:00
static pthread_key_t threadstopkey;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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)
{
}
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
struct thread_local_inits_st *local = pthread_getspecific(threadstopkey);
if (local == NULL && alloc) {
local = OPENSSL_zalloc(sizeof *local);
pthread_setspecific(threadstopkey, local);
}
NULL the thread_local_inits_st pointer after use After the final use of the thread_local_inits_st we should ensure it is set to NULL, just in case OPENSSL_INIT_thread_stop gets called again and it tries to use garbage. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-09 23:09:44 +00:00
if (!alloc) {
pthread_setspecific(threadstopkey, NULL);
}
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
return local;
}
#endif
Hide OPENSSL_INIT_SETTINGS. Make OPENSSL_INIT_SETTINGS an opaque structure. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-10 14:55:48 +00:00
typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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();
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
atexit(OPENSSL_cleanup);
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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)
{
Add an OPENSSL_NO_AUTOERRINIT option This option disables automatic loading of the crypto/ssl error strings in order to keep statically linked executable file size down Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 09:39:07 +00:00
/*
* 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)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
# 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;
}
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;
}
#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;
}
Provide a thread stop API Add the OPENSSL_INIT_thread_stop() function. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 09:13:45 +00:00
static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
/* 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_cleanup_thread()\n");
#endif
ASYNC_cleanup_thread();
}
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);
ossl_init_thread_stop_cleanup();
}
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
void OPENSSL_thread_stop(void)
Provide a thread stop API Add the OPENSSL_INIT_thread_stop() function. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 09:13:45 +00:00
{
ossl_init_thread_stop(
(struct thread_local_inits_st *)ossl_init_get_thread_local(0));
}
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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;
}
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
void OPENSSL_cleanup(void)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
OPENSSL_INIT_STOP *currhandler, *lasthandler;
If we've not been inited don't deinit If you call an explicit deinit when we've not been inited then a seg fault can occur. We should check that we've been inited before attempting to deinit. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 09:47:51 +00:00
/* If we've not been inited then no need to deinit */
if (!base_inited)
return;
Can't re-init after stop. Remoce DYANMIC once-init stuff. After the library is stopped, you can't restart it. Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-10 05:39:29 +00:00
/* Might be explicitly called and also by atexit */
if (stopped)
return;
stopped = 1;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
/*
* 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
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
"COMP_zlib_cleanup()\n");
#endif
COMP_zlib_cleanup();
}
#ifndef OPENSSL_NO_ENGINE
if (engine_inited) {
# ifdef OPENSSL_INIT_DEBUG
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
"ENGINE_cleanup()\n");
# endif
ENGINE_cleanup();
}
#endif
if (load_crypto_strings_inited) {
#ifdef OPENSSL_INIT_DEBUG
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
"ERR_free_strings()\n");
#endif
ERR_free_strings();
}
#ifdef OPENSSL_INIT_DEBUG
If we've not been inited don't deinit If you call an explicit deinit when we've not been inited then a seg fault can occur. We should check that we've been inited before attempting to deinit. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 09:47:51 +00:00
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");
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
#endif
If we've not been inited don't deinit If you call an explicit deinit when we've not been inited then a seg fault can occur. We should check that we've been inited before attempting to deinit. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 09:47:51 +00:00
CRYPTO_cleanup_all_ex_data();
EVP_cleanup();
CONF_modules_free();
RAND_cleanup();
base_inited = 0;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
}
/*
* 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.
*/
The new init functions can now fail so shouldn't be void The new init functions can fail if the library has already been stopped. We should be able to indicate failure with a 0 return value. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 13:59:15 +00:00
int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
Attempt to log an error if init failed If init failed we'd like to set an error code to indicate that. But if init failed then when the error system tries to load its strings its going to fail again. We could get into an infinite loop. Therefore we just set a single error the first time around. After that no error is set. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 15:16:06 +00:00
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;
After renaming init, update errors. Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-10 20:20:48 +00:00
CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
Attempt to log an error if init failed If init failed we'd like to set an error code to indicate that. But if init failed then when the error system tries to load its strings its going to fail again. We could get into an infinite loop. Therefore we just set a single error the first time around. After that no error is set. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 15:16:06 +00:00
}
The new init functions can now fail so shouldn't be void The new init functions can fail if the library has already been stopped. We should be able to indicate failure with a 0 return value. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 13:59:15 +00:00
return 0;
Attempt to log an error if init failed If init failed we'd like to set an error code to indicate that. But if init failed then when the error system tries to load its strings its going to fail again. We could get into an infinite loop. Therefore we just set a single error the first time around. After that no error is set. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 15:16:06 +00:00
}
Can't re-init after stop. Remoce DYANMIC once-init stuff. After the library is stopped, you can't restart it. Reviewed-by: Matt Caswell <matt@openssl.org>
2016-02-10 05:39:29 +00:00
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
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) {
Avoid a race condition in loading config settings A race condition can occur when sending config settings to OPENSSL_INIT_crypto_library_start() Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 10:55:21 +00:00
CRYPTO_w_lock(CRYPTO_LOCK_INIT);
Hide OPENSSL_INIT_SETTINGS. Make OPENSSL_INIT_SETTINGS an opaque structure. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-10 14:55:48 +00:00
config_filename = (settings == NULL) ? NULL : settings->config_name;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
ossl_init_once_run(&config, ossl_init_config);
Avoid a race condition in loading config settings A race condition can occur when sending config settings to OPENSSL_INIT_crypto_library_start() Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 10:55:21 +00:00
CRYPTO_w_unlock(CRYPTO_LOCK_INIT);
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
}
if (opts & OPENSSL_INIT_ASYNC) {
ossl_init_once_run(&async, ossl_init_async);
}
#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);
}
The new init functions can now fail so shouldn't be void The new init functions can fail if the library has already been stopped. We should be able to indicate failure with a 0 return value. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-02-10 13:59:15 +00:00
return 1;
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
}
Rename INIT funtions, deprecate old ones. Man, there were a lot of renamings :) Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 16:52:40 +00:00
int OPENSSL_atexit(void (*handler)(void))
Provide framework for auto initialise/deinitialise of the library This commit provides the basis and core code for an auto initialisation and deinitialisation framework for libcrypto and libssl. The intention is to remove the need (in many circumstances) to call explicit initialise and deinitialise functions. Explicit initialisation will still be an option, and if non-default initialisation is needed then it will be required. Similarly for de-initialisation (although this will be a lot easier since it will bring all de-initialisation into a single function). Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-02-09 11:26:14 +00:00
{
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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