-/* crypto/engine/eng_init.c */
-/* ====================================================================
- * Copyright (c) 1999-2001 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
- * licensing@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).
+/*
+ * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (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 <openssl/crypto.h>
-#include "cryptlib.h"
#include "eng_int.h"
-#include <openssl/engine.h>
-/* Initialise a engine type for use (or up its functional reference count
- * if it's already in use). This version is only used internally. */
+/*
+ * Initialise a engine type for use (or up its functional reference count if
+ * it's already in use). This version is only used internally.
+ */
int engine_unlocked_init(ENGINE *e)
- {
- int to_return = 1;
+{
+ int to_return = 1;
- if((e->funct_ref == 0) && e->init)
- /* This is the first functional reference and the engine
- * requires initialisation so we do it now. */
- to_return = e->init(e);
- if(to_return)
- {
- /* OK, we return a functional reference which is also a
- * structural reference. */
- e->struct_ref++;
- e->funct_ref++;
- engine_ref_debug(e, 0, 1)
- engine_ref_debug(e, 1, 1)
- }
- return to_return;
- }
+ if ((e->funct_ref == 0) && e->init)
+ /*
+ * This is the first functional reference and the engine requires
+ * initialisation so we do it now.
+ */
+ to_return = e->init(e);
+ if (to_return) {
+ /*
+ * OK, we return a functional reference which is also a structural
+ * reference.
+ */
+ e->struct_ref++;
+ e->funct_ref++;
+ engine_ref_debug(e, 0, 1);
+ engine_ref_debug(e, 1, 1);
+ }
+ return to_return;
+}
-/* Free a functional reference to a engine type. This version is only used
- * internally. */
+/*
+ * Free a functional reference to a engine type. This version is only used
+ * internally.
+ */
int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers)
- {
- int to_return = 1;
+{
+ int to_return = 1;
- /* Reduce the functional reference count here so if it's the terminating
- * case, we can release the lock safely and call the finish() handler
- * without risk of a race. We get a race if we leave the count until
- * after and something else is calling "finish" at the same time -
- * there's a chance that both threads will together take the count from
- * 2 to 0 without either calling finish(). */
- e->funct_ref--;
- engine_ref_debug(e, 1, -1)
- if((e->funct_ref == 0) && e->finish)
- {
- if(unlock_for_handlers)
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- to_return = e->finish(e);
- if(unlock_for_handlers)
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- if(!to_return)
- return 0;
- }
-#ifdef REF_CHECK
- if(e->funct_ref < 0)
- {
- fprintf(stderr,"ENGINE_finish, bad functional reference count\n");
- abort();
- }
-#endif
- /* Release the structural reference too */
- if(!engine_free_util(e, 0))
- {
- ENGINEerr(ENGINE_F_ENGINE_FINISH,ENGINE_R_FINISH_FAILED);
- return 0;
- }
- return to_return;
- }
+ /*
+ * Reduce the functional reference count here so if it's the terminating
+ * case, we can release the lock safely and call the finish() handler
+ * without risk of a race. We get a race if we leave the count until
+ * after and something else is calling "finish" at the same time -
+ * there's a chance that both threads will together take the count from 2
+ * to 0 without either calling finish().
+ */
+ e->funct_ref--;
+ engine_ref_debug(e, 1, -1);
+ if ((e->funct_ref == 0) && e->finish) {
+ if (unlock_for_handlers)
+ CRYPTO_THREAD_unlock(global_engine_lock);
+ to_return = e->finish(e);
+ if (unlock_for_handlers)
+ CRYPTO_THREAD_write_lock(global_engine_lock);
+ if (!to_return)
+ return 0;
+ }
+ REF_ASSERT_ISNT(e->funct_ref < 0);
+ /* Release the structural reference too */
+ if (!engine_free_util(e, 0)) {
+ ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH, ENGINE_R_FINISH_FAILED);
+ return 0;
+ }
+ return to_return;
+}
/* The API (locked) version of "init" */
int ENGINE_init(ENGINE *e)
- {
- int ret;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_INIT,ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- ret = engine_unlocked_init(e);
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- return ret;
- }
+{
+ int ret;
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
+ ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ CRYPTO_THREAD_write_lock(global_engine_lock);
+ ret = engine_unlocked_init(e);
+ CRYPTO_THREAD_unlock(global_engine_lock);
+ return ret;
+}
/* The API (locked) version of "finish" */
int ENGINE_finish(ENGINE *e)
- {
- int to_return = 1;
+{
+ int to_return = 1;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_FINISH,ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- to_return = engine_unlocked_finish(e, 1);
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- if(!to_return)
- {
- ENGINEerr(ENGINE_F_ENGINE_FINISH,ENGINE_R_FINISH_FAILED);
- return 0;
- }
- return to_return;
- }
+ if (e == NULL)
+ return 1;
+ CRYPTO_THREAD_write_lock(global_engine_lock);
+ to_return = engine_unlocked_finish(e, 1);
+ CRYPTO_THREAD_unlock(global_engine_lock);
+ if (!to_return) {
+ ENGINEerr(ENGINE_F_ENGINE_FINISH, ENGINE_R_FINISH_FAILED);
+ return 0;
+ }
+ return to_return;
+}
projects / openssl.git / blobdiff