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157 lines
5.4 KiB
157 lines
5.4 KiB
/* crypto/engine/eng_init.c */ |
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/* ==================================================================== |
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* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include "eng_int.h" |
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/* |
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* Initialise a engine type for use (or up its functional reference count if |
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* it's already in use). This version is only used internally. |
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*/ |
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int engine_unlocked_init(ENGINE *e) |
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{ |
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int to_return = 1; |
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if ((e->funct_ref == 0) && e->init) |
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/* |
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* This is the first functional reference and the engine requires |
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* initialisation so we do it now. |
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*/ |
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to_return = e->init(e); |
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if (to_return) { |
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/* |
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* OK, we return a functional reference which is also a structural |
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* reference. |
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*/ |
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e->struct_ref++; |
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e->funct_ref++; |
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engine_ref_debug(e, 0, 1) |
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engine_ref_debug(e, 1, 1) |
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} |
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return to_return; |
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} |
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/* |
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* Free a functional reference to a engine type. This version is only used |
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* internally. |
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*/ |
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int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers) |
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{ |
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int to_return = 1; |
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/* |
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* Reduce the functional reference count here so if it's the terminating |
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* case, we can release the lock safely and call the finish() handler |
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* without risk of a race. We get a race if we leave the count until |
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* after and something else is calling "finish" at the same time - |
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* there's a chance that both threads will together take the count from 2 |
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* to 0 without either calling finish(). |
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*/ |
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e->funct_ref--; |
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engine_ref_debug(e, 1, -1); |
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if ((e->funct_ref == 0) && e->finish) { |
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if (unlock_for_handlers) |
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CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); |
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to_return = e->finish(e); |
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if (unlock_for_handlers) |
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CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); |
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if (!to_return) |
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return 0; |
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} |
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#ifdef REF_CHECK |
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if (e->funct_ref < 0) { |
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fprintf(stderr, "ENGINE_finish, bad functional reference count\n"); |
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abort(); |
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} |
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#endif |
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/* Release the structural reference too */ |
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if (!engine_free_util(e, 0)) { |
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ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH, ENGINE_R_FINISH_FAILED); |
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return 0; |
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} |
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return to_return; |
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} |
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/* The API (locked) version of "init" */ |
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int ENGINE_init(ENGINE *e) |
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{ |
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int ret; |
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if (e == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); |
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ret = engine_unlocked_init(e); |
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CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); |
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return ret; |
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} |
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/* The API (locked) version of "finish" */ |
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int ENGINE_finish(ENGINE *e) |
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{ |
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int to_return = 1; |
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if (e == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_FINISH, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); |
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to_return = engine_unlocked_finish(e, 1); |
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CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); |
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if (!to_return) { |
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ENGINEerr(ENGINE_F_ENGINE_FINISH, ENGINE_R_FINISH_FAILED); |
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return 0; |
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} |
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return to_return; |
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}
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