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