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pineappleEA
2020-12-28 15:15:37 +00:00
parent 84b39492d1
commit 78b48028e1
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258
externals/libressl/crypto/ecdsa/ecs_lib.c vendored Executable file
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/* $OpenBSD: ecs_lib.c,v 1.13 2018/04/14 07:09:21 tb Exp $ */
/* ====================================================================
* 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
* notice, this list of conditions and the following disclaimer.
*
* 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 <openssl/opensslconf.h>
#include "ecs_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include <openssl/bn.h>
static const ECDSA_METHOD *default_ECDSA_method = NULL;
static void *ecdsa_data_new(void);
static void *ecdsa_data_dup(void *);
static void ecdsa_data_free(void *);
void
ECDSA_set_default_method(const ECDSA_METHOD *meth)
{
default_ECDSA_method = meth;
}
const ECDSA_METHOD *
ECDSA_get_default_method(void)
{
if (!default_ECDSA_method) {
default_ECDSA_method = ECDSA_OpenSSL();
}
return default_ECDSA_method;
}
int
ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
{
ECDSA_DATA *ecdsa;
ecdsa = ecdsa_check(eckey);
if (ecdsa == NULL)
return 0;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ecdsa->engine);
ecdsa->engine = NULL;
#endif
ecdsa->meth = meth;
return 1;
}
static ECDSA_DATA *
ECDSA_DATA_new_method(ENGINE *engine)
{
ECDSA_DATA *ret;
ret = malloc(sizeof(ECDSA_DATA));
if (ret == NULL) {
ECDSAerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->init = NULL;
ret->meth = ECDSA_get_default_method();
ret->engine = engine;
#ifndef OPENSSL_NO_ENGINE
if (!ret->engine)
ret->engine = ENGINE_get_default_ECDSA();
if (ret->engine) {
ret->meth = ENGINE_get_ECDSA(ret->engine);
if (ret->meth == NULL) {
ECDSAerror(ERR_R_ENGINE_LIB);
ENGINE_finish(ret->engine);
free(ret);
return NULL;
}
}
#endif
ret->flags = ret->meth->flags;
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
return (ret);
}
static void *
ecdsa_data_new(void)
{
return (void *)ECDSA_DATA_new_method(NULL);
}
static void *
ecdsa_data_dup(void *data)
{
ECDSA_DATA *r = (ECDSA_DATA *)data;
/* XXX: dummy operation */
if (r == NULL)
return NULL;
return ecdsa_data_new();
}
static void
ecdsa_data_free(void *data)
{
ECDSA_DATA *r = (ECDSA_DATA *)data;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(r->engine);
#endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
freezero(r, sizeof(ECDSA_DATA));
}
ECDSA_DATA *
ecdsa_check(EC_KEY *key)
{
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;
return ecdsa_data;
}
int
ECDSA_size(const EC_KEY *r)
{
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);
}
int
ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
new_func, dup_func, free_func);
}
int
ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
{
ECDSA_DATA *ecdsa;
ecdsa = ecdsa_check(d);
if (ecdsa == NULL)
return 0;
return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
}
void *
ECDSA_get_ex_data(EC_KEY *d, int idx)
{
ECDSA_DATA *ecdsa;
ecdsa = ecdsa_check(d);
if (ecdsa == NULL)
return NULL;
return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
}