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- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include <openssl/engine.h>
-
- #include <openssl/dh.h>
- #include <openssl/dsa.h>
- #include <openssl/ec_key.h>
- #include <openssl/mem.h>
- #include <openssl/rsa.h>
- #include <openssl/thread.h>
-
-
- struct engine_st {
- DH_METHOD *dh_method;
- DSA_METHOD *dsa_method;
- RSA_METHOD *rsa_method;
- ECDSA_METHOD *ecdsa_method;
- };
-
- ENGINE *ENGINE_new(void) {
- ENGINE *engine = OPENSSL_malloc(sizeof(ENGINE));
- if (engine == NULL) {
- return NULL;
- }
-
- memset(engine, 0, sizeof(ENGINE));
- return engine;
- }
-
- void ENGINE_free(ENGINE *engine) {
- if (engine->dh_method != NULL) {
- METHOD_unref(engine->dh_method);
- }
-
- OPENSSL_free(engine);
- }
-
- /* set_method takes a pointer to a method and its given size and sets
- * |*out_member| to point to a copy of it. The copy is |compiled_size| bytes
- * long and has zero padding if needed. */
- static int set_method(void **out_member, const void *method, size_t method_size,
- size_t compiled_size) {
- void *copy = OPENSSL_malloc(compiled_size);
- if (copy == NULL) {
- return 0;
- }
-
- memset(copy, 0, compiled_size);
-
- if (method_size > compiled_size) {
- method_size = compiled_size;
- }
- memcpy(copy, method, method_size);
-
- METHOD_unref(*out_member);
- *out_member = copy;
-
- return 1;
- }
-
- int ENGINE_set_DH_method(ENGINE *engine, const DH_METHOD *method,
- size_t method_size) {
- return set_method((void **)&engine->dh_method, method, method_size,
- sizeof(DH_METHOD));
- }
-
- DH_METHOD *ENGINE_get_DH_method(const ENGINE *engine) {
- return engine->dh_method;
- }
-
- int ENGINE_set_DSA_method(ENGINE *engine, const DSA_METHOD *method,
- size_t method_size) {
- return set_method((void **)&engine->dsa_method, method, method_size,
- sizeof(DSA_METHOD));
- }
-
- DSA_METHOD *ENGINE_get_DSA_method(const ENGINE *engine) {
- return engine->dsa_method;
- }
-
- int ENGINE_set_RSA_method(ENGINE *engine, const RSA_METHOD *method,
- size_t method_size) {
- return set_method((void **)&engine->rsa_method, method, method_size,
- sizeof(RSA_METHOD));
- }
-
- RSA_METHOD *ENGINE_get_RSA_method(const ENGINE *engine) {
- return engine->rsa_method;
- }
-
- int ENGINE_set_ECDSA_method(ENGINE *engine, const ECDSA_METHOD *method,
- size_t method_size) {
- return set_method((void **)&engine->ecdsa_method, method, method_size,
- sizeof(ECDSA_METHOD));
- }
-
- ECDSA_METHOD *ENGINE_get_ECDSA_method(const ENGINE *engine) {
- return engine->ecdsa_method;
- }
-
- void METHOD_ref(void *method_in) {
- struct openssl_method_common_st *method = method_in;
-
- if (method->is_static) {
- return;
- }
-
- CRYPTO_add(&method->references, 1, CRYPTO_LOCK_ENGINE);
- }
-
- void METHOD_unref(void *method_in) {
- struct openssl_method_common_st *method = method_in;
-
- if (method == NULL || method->is_static) {
- return;
- }
-
- if (CRYPTO_add(&method->references, -1, CRYPTO_LOCK_ENGINE) == 0) {
- OPENSSL_free(method);
- }
- }
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