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Diffstat (limited to 'thirdparty/openssl/crypto/engine/eng_init.c')
| -rw-r--r-- | thirdparty/openssl/crypto/engine/eng_init.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/engine/eng_init.c b/thirdparty/openssl/crypto/engine/eng_init.c new file mode 100644 index 0000000000..4ea7fe633c --- /dev/null +++ b/thirdparty/openssl/crypto/engine/eng_init.c @@ -0,0 +1,157 @@ +/* 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). + * + */ + +#include "eng_int.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. + */ +int engine_unlocked_init(ENGINE *e) +{ + 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; +} + +/* + * 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; + + /* + * 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_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; +} + +/* The API (locked) version of "finish" */ +int ENGINE_finish(ENGINE *e) +{ + 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; +} |