2 * Copyright 2001-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
14 #include "eng_local.h"
17 * Initialise a engine type for use (or up its functional reference count if
18 * it's already in use). This version is only used internally.
20 int engine_unlocked_init(ENGINE *e)
24 if ((e->funct_ref == 0) && e->init)
26 * This is the first functional reference and the engine requires
27 * initialisation so we do it now.
29 to_return = e->init(e);
32 * OK, we return a functional reference which is also a structural
37 engine_ref_debug(e, 0, 1);
38 engine_ref_debug(e, 1, 1);
44 * Free a functional reference to a engine type. This version is only used
47 int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers)
52 * Reduce the functional reference count here so if it's the terminating
53 * case, we can release the lock safely and call the finish() handler
54 * without risk of a race. We get a race if we leave the count until
55 * after and something else is calling "finish" at the same time -
56 * there's a chance that both threads will together take the count from 2
57 * to 0 without either calling finish().
60 engine_ref_debug(e, 1, -1);
61 if ((e->funct_ref == 0) && e->finish) {
62 if (unlock_for_handlers)
63 CRYPTO_THREAD_unlock(global_engine_lock);
64 to_return = e->finish(e);
65 if (unlock_for_handlers)
66 CRYPTO_THREAD_write_lock(global_engine_lock);
70 REF_ASSERT_ISNT(e->funct_ref < 0);
71 /* Release the structural reference too */
72 if (!engine_free_util(e, 0)) {
73 ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH, ENGINE_R_FINISH_FAILED);
79 /* The API (locked) version of "init" */
80 int ENGINE_init(ENGINE *e)
84 ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_PASSED_NULL_PARAMETER);
87 if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
88 ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_MALLOC_FAILURE);
91 CRYPTO_THREAD_write_lock(global_engine_lock);
92 ret = engine_unlocked_init(e);
93 CRYPTO_THREAD_unlock(global_engine_lock);
97 /* The API (locked) version of "finish" */
98 int ENGINE_finish(ENGINE *e)
104 CRYPTO_THREAD_write_lock(global_engine_lock);
105 to_return = engine_unlocked_finish(e, 1);
106 CRYPTO_THREAD_unlock(global_engine_lock);
108 ENGINEerr(ENGINE_F_ENGINE_FINISH, ENGINE_R_FINISH_FAILED);