2014-04-29 00:56:43 +00:00
|
|
|
/* crypto/ecdsa/ecs_lib.c */
|
|
|
|
/* ====================================================================
|
|
|
|
* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
*
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
2016-04-10 13:18:59 +00:00
|
|
|
* notice, this list of conditions and the following disclaimer.
|
2014-04-29 00:56:43 +00:00
|
|
|
*
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in
|
|
|
|
* the documentation and/or other materials provided with the
|
|
|
|
* distribution.
|
|
|
|
*
|
|
|
|
* 3. All advertising materials mentioning features or use of this
|
|
|
|
* software must display the following acknowledgment:
|
|
|
|
* "This product includes software developed by the OpenSSL Project
|
|
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
|
|
*
|
|
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
|
|
* endorse or promote products derived from this software without
|
|
|
|
* prior written permission. For written permission, please contact
|
|
|
|
* openssl-core@OpenSSL.org.
|
|
|
|
*
|
|
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
|
|
* permission of the OpenSSL Project.
|
|
|
|
*
|
|
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
|
|
* acknowledgment:
|
|
|
|
* "This product includes software developed by the OpenSSL Project
|
|
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
* ====================================================================
|
|
|
|
*
|
|
|
|
* This product includes cryptographic software written by Eric Young
|
|
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
|
|
* Hudson (tjh@cryptsoft.com).
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
#include "ecs_locl.h"
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2016-04-10 13:18:59 +00:00
|
|
|
# include <openssl/engine.h>
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
|
|
|
#include <openssl/err.h>
|
|
|
|
#include <openssl/bn.h>
|
|
|
|
#ifdef OPENSSL_FIPS
|
2016-04-10 13:18:59 +00:00
|
|
|
# include <openssl/fips.h>
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
const char ECDSA_version[] = "ECDSA" OPENSSL_VERSION_PTEXT;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
|
|
|
static const ECDSA_METHOD *default_ECDSA_method = NULL;
|
|
|
|
|
|
|
|
static void *ecdsa_data_new(void);
|
|
|
|
static void *ecdsa_data_dup(void *);
|
2016-04-10 13:18:59 +00:00
|
|
|
static void ecdsa_data_free(void *);
|
2014-04-29 00:56:43 +00:00
|
|
|
|
|
|
|
void ECDSA_set_default_method(const ECDSA_METHOD *meth)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
default_ECDSA_method = meth;
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
const ECDSA_METHOD *ECDSA_get_default_method(void)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
if (!default_ECDSA_method) {
|
2014-04-29 00:56:43 +00:00
|
|
|
#ifdef OPENSSL_FIPS
|
2016-04-10 13:18:59 +00:00
|
|
|
if (FIPS_mode())
|
|
|
|
return FIPS_ecdsa_openssl();
|
|
|
|
else
|
|
|
|
return ECDSA_OpenSSL();
|
2014-04-29 00:56:43 +00:00
|
|
|
#else
|
2016-04-10 13:18:59 +00:00
|
|
|
default_ECDSA_method = ECDSA_OpenSSL();
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
2016-04-10 13:18:59 +00:00
|
|
|
}
|
|
|
|
return default_ECDSA_method;
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *ecdsa;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
ecdsa = ecdsa_check(eckey);
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
if (ecdsa == NULL)
|
|
|
|
return 0;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2016-04-10 13:18:59 +00:00
|
|
|
if (ecdsa->engine) {
|
|
|
|
ENGINE_finish(ecdsa->engine);
|
|
|
|
ecdsa->engine = NULL;
|
|
|
|
}
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
2016-04-10 13:18:59 +00:00
|
|
|
ecdsa->meth = meth;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
return 1;
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *ret;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
ret = (ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
|
|
|
|
if (ret == NULL) {
|
|
|
|
ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
|
|
|
|
return (NULL);
|
|
|
|
}
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
ret->init = NULL;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
ret->meth = ECDSA_get_default_method();
|
|
|
|
ret->engine = engine;
|
2014-04-29 00:56:43 +00:00
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2016-04-10 13:18:59 +00:00
|
|
|
if (!ret->engine)
|
|
|
|
ret->engine = ENGINE_get_default_ECDSA();
|
|
|
|
if (ret->engine) {
|
|
|
|
ret->meth = ENGINE_get_ECDSA(ret->engine);
|
|
|
|
if (!ret->meth) {
|
|
|
|
ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
|
|
|
|
ENGINE_finish(ret->engine);
|
|
|
|
OPENSSL_free(ret);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
ret->flags = ret->meth->flags;
|
|
|
|
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
|
2014-04-29 00:56:43 +00:00
|
|
|
#if 0
|
2016-04-10 13:18:59 +00:00
|
|
|
if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
|
|
|
|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
|
|
|
|
OPENSSL_free(ret);
|
|
|
|
ret = NULL;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return (ret);
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void *ecdsa_data_new(void)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
return (void *)ECDSA_DATA_new_method(NULL);
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void *ecdsa_data_dup(void *data)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *r = (ECDSA_DATA *)data;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
/* XXX: dummy operation */
|
|
|
|
if (r == NULL)
|
|
|
|
return NULL;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
return ecdsa_data_new();
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void ecdsa_data_free(void *data)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *r = (ECDSA_DATA *)data;
|
2014-04-29 00:56:43 +00:00
|
|
|
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2016-04-10 13:18:59 +00:00
|
|
|
if (r->engine)
|
|
|
|
ENGINE_finish(r->engine);
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
2016-04-10 13:18:59 +00:00
|
|
|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
|
2014-04-29 00:56:43 +00:00
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
OPENSSL_free(r);
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ECDSA_DATA *ecdsa_check(EC_KEY *key)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *ecdsa_data;
|
|
|
|
|
|
|
|
void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
|
|
|
|
ecdsa_data_free, ecdsa_data_free);
|
|
|
|
if (data == NULL) {
|
|
|
|
ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
|
|
|
|
if (ecdsa_data == NULL)
|
|
|
|
return NULL;
|
|
|
|
data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
|
|
|
|
ecdsa_data_dup, ecdsa_data_free,
|
|
|
|
ecdsa_data_free);
|
|
|
|
if (data != NULL) {
|
|
|
|
/*
|
|
|
|
* Another thread raced us to install the key_method data and
|
|
|
|
* won.
|
|
|
|
*/
|
|
|
|
ecdsa_data_free(ecdsa_data);
|
|
|
|
ecdsa_data = (ECDSA_DATA *)data;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
ecdsa_data = (ECDSA_DATA *)data;
|
2014-04-29 00:56:43 +00:00
|
|
|
#ifdef OPENSSL_FIPS
|
2016-04-10 13:18:59 +00:00
|
|
|
if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD)
|
|
|
|
&& !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW)) {
|
|
|
|
ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD);
|
|
|
|
return NULL;
|
|
|
|
}
|
2014-04-29 00:56:43 +00:00
|
|
|
#endif
|
|
|
|
|
2016-04-10 13:18:59 +00:00
|
|
|
return ecdsa_data;
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int ECDSA_size(const EC_KEY *r)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
int ret, i;
|
|
|
|
ASN1_INTEGER bs;
|
|
|
|
BIGNUM *order = NULL;
|
|
|
|
unsigned char buf[4];
|
|
|
|
const EC_GROUP *group;
|
|
|
|
|
|
|
|
if (r == NULL)
|
|
|
|
return 0;
|
|
|
|
group = EC_KEY_get0_group(r);
|
|
|
|
if (group == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if ((order = BN_new()) == NULL)
|
|
|
|
return 0;
|
|
|
|
if (!EC_GROUP_get_order(group, order, NULL)) {
|
|
|
|
BN_clear_free(order);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
i = BN_num_bits(order);
|
|
|
|
bs.length = (i + 7) / 8;
|
|
|
|
bs.data = buf;
|
|
|
|
bs.type = V_ASN1_INTEGER;
|
|
|
|
/* If the top bit is set the asn1 encoding is 1 larger. */
|
|
|
|
buf[0] = 0xff;
|
|
|
|
|
|
|
|
i = i2d_ASN1_INTEGER(&bs, NULL);
|
|
|
|
i += i; /* r and s */
|
|
|
|
ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
|
|
|
|
BN_clear_free(order);
|
|
|
|
return (ret);
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
|
2016-04-10 13:18:59 +00:00
|
|
|
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
|
2014-04-29 00:56:43 +00:00
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
|
|
|
|
new_func, dup_func, free_func);
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *ecdsa;
|
|
|
|
ecdsa = ecdsa_check(d);
|
|
|
|
if (ecdsa == NULL)
|
|
|
|
return 0;
|
|
|
|
return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void *ECDSA_get_ex_data(EC_KEY *d, int idx)
|
|
|
|
{
|
2016-04-10 13:18:59 +00:00
|
|
|
ECDSA_DATA *ecdsa;
|
|
|
|
ecdsa = ecdsa_check(d);
|
|
|
|
if (ecdsa == NULL)
|
|
|
|
return NULL;
|
|
|
|
return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
|
2014-04-29 00:56:43 +00:00
|
|
|
}
|