2 * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
11 #include <openssl/rand.h>
13 CRYPTO_RWLOCK *global_engine_lock;
15 CRYPTO_ONCE engine_lock_init = CRYPTO_ONCE_STATIC_INIT;
17 /* The "new"/"free" stuff first */
19 DEFINE_RUN_ONCE(do_engine_lock_init)
21 global_engine_lock = CRYPTO_THREAD_lock_new();
22 return global_engine_lock != NULL;
25 ENGINE *ENGINE_new(void)
29 if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)
30 || (ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
31 ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);
35 engine_ref_debug(ret, 0, 1);
36 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data)) {
44 * Placed here (close proximity to ENGINE_new) so that modifications to the
45 * elements of the ENGINE structure are more likely to be caught and changed
48 void engine_set_all_null(ENGINE *e)
62 e->load_privkey = NULL;
63 e->load_pubkey = NULL;
68 int engine_free_util(ENGINE *e, int locked)
75 CRYPTO_atomic_add(&e->struct_ref, -1, &i, global_engine_lock);
78 engine_ref_debug(e, 0, -1)
81 REF_ASSERT_ISNT(i < 0);
82 /* Free up any dynamically allocated public key methods */
83 engine_pkey_meths_free(e);
84 engine_pkey_asn1_meths_free(e);
86 * Give the ENGINE a chance to do any structural cleanup corresponding to
87 * allocation it did in its constructor (eg. unload error strings)
91 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);
96 int ENGINE_free(ENGINE *e)
98 return engine_free_util(e, 1);
104 * engine_cleanup_int() is coded such that anything that does work that will
105 * need cleanup can register a "cleanup" callback here. That way we don't get
106 * linker bloat by referring to all *possible* cleanups, but any linker bloat
107 * into code "X" will cause X's cleanup function to end up here.
109 static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL;
110 static int int_cleanup_check(int create)
116 cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null();
117 return (cleanup_stack ? 1 : 0);
120 static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb)
122 ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(*item));
129 void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb)
131 ENGINE_CLEANUP_ITEM *item;
132 if (!int_cleanup_check(1))
134 item = int_cleanup_item(cb);
136 sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0);
139 void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb)
141 ENGINE_CLEANUP_ITEM *item;
142 if (!int_cleanup_check(1))
144 item = int_cleanup_item(cb);
146 sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item);
149 /* The API function that performs all cleanup */
150 static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item)
156 void engine_cleanup_int(void)
158 if (int_cleanup_check(0)) {
159 sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack,
160 engine_cleanup_cb_free);
161 cleanup_stack = NULL;
164 * FIXME: This should be handled (somehow) through RAND, eg. by it
165 * registering a cleanup callback.
167 RAND_set_rand_method(NULL);
168 CRYPTO_THREAD_lock_free(global_engine_lock);
171 /* Now the "ex_data" support */
173 int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)
175 return (CRYPTO_set_ex_data(&e->ex_data, idx, arg));
178 void *ENGINE_get_ex_data(const ENGINE *e, int idx)
180 return (CRYPTO_get_ex_data(&e->ex_data, idx));
184 * Functions to get/set an ENGINE's elements - mainly to avoid exposing the
185 * ENGINE structure itself.
188 int ENGINE_set_id(ENGINE *e, const char *id)
191 ENGINEerr(ENGINE_F_ENGINE_SET_ID, ERR_R_PASSED_NULL_PARAMETER);
198 int ENGINE_set_name(ENGINE *e, const char *name)
201 ENGINEerr(ENGINE_F_ENGINE_SET_NAME, ERR_R_PASSED_NULL_PARAMETER);
208 int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f)
210 e->destroy = destroy_f;
214 int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)
220 int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)
222 e->finish = finish_f;
226 int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)
232 int ENGINE_set_flags(ENGINE *e, int flags)
238 int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)
240 e->cmd_defns = defns;
244 const char *ENGINE_get_id(const ENGINE *e)
249 const char *ENGINE_get_name(const ENGINE *e)
254 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e)
259 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)
264 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)
269 ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)
274 int ENGINE_get_flags(const ENGINE *e)
279 const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)
285 * eng_lib.o is pretty much linked into anything that touches ENGINE already,
286 * so put the "static_state" hack here.
289 static int internal_static_hack = 0;
291 void *ENGINE_get_static_state(void)
293 return &internal_static_hack;