1 /* crypto/engine/eng_init.c */
2 /* ====================================================================
3 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
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25 * licensing@OpenSSL.org.
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
59 * Initialise a engine type for use (or up its functional reference count if
60 * it's already in use). This version is only used internally.
62 int engine_unlocked_init(ENGINE *e)
66 if ((e->funct_ref == 0) && e->init)
68 * This is the first functional reference and the engine requires
69 * initialisation so we do it now.
71 to_return = e->init(e);
74 * OK, we return a functional reference which is also a structural
79 engine_ref_debug(e, 0, 1)
80 engine_ref_debug(e, 1, 1)
86 * Free a functional reference to a engine type. This version is only used
89 int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers)
94 * Reduce the functional reference count here so if it's the terminating
95 * case, we can release the lock safely and call the finish() handler
96 * without risk of a race. We get a race if we leave the count until
97 * after and something else is calling "finish" at the same time -
98 * there's a chance that both threads will together take the count from 2
99 * to 0 without either calling finish().
102 engine_ref_debug(e, 1, -1);
103 if ((e->funct_ref == 0) && e->finish) {
104 if (unlock_for_handlers)
105 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
106 to_return = e->finish(e);
107 if (unlock_for_handlers)
108 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
113 if (e->funct_ref < 0) {
114 fprintf(stderr, "ENGINE_finish, bad functional reference count\n");
118 /* Release the structural reference too */
119 if (!engine_free_util(e, 0)) {
120 ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH, ENGINE_R_FINISH_FAILED);
126 /* The API (locked) version of "init" */
127 int ENGINE_init(ENGINE *e)
131 ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_PASSED_NULL_PARAMETER);
134 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
135 ret = engine_unlocked_init(e);
136 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
140 /* The API (locked) version of "finish" */
141 int ENGINE_finish(ENGINE *e)
146 ENGINEerr(ENGINE_F_ENGINE_FINISH, ERR_R_PASSED_NULL_PARAMETER);
149 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
150 to_return = engine_unlocked_finish(e, 1);
151 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
153 ENGINEerr(ENGINE_F_ENGINE_FINISH, ENGINE_R_FINISH_FAILED);