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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 <string.h>
#include <openssl/dh.h>
#include <openssl/dsa.h>
#include <openssl/ec_key.h>
#include <openssl/err.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);
}
}
OPENSSL_DECLARE_ERROR_REASON(ENGINE, OPERATION_NOT_SUPPORTED);
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