ref: 5ebb1a29d8250027e8b7f2287f3bfa3a6f3d13ac
dir: /sys/src/ape/lib/openssl/crypto/ecdsa/ecs_lib.c/
/* 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
* 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
* [email protected].
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <string.h>
#include "ecs_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include <openssl/bn.h>
const char ECDSA_version[]="ECDSA" OPENSSL_VERSION_PTEXT;
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)
{
const ECDSA_METHOD *mtmp;
ECDSA_DATA *ecdsa;
ecdsa = ecdsa_check(eckey);
if (ecdsa == NULL)
return 0;
mtmp = ecdsa->meth;
#ifndef OPENSSL_NO_ENGINE
if (ecdsa->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=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
if (ret == NULL)
{
ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, 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)
{
ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
ENGINE_finish(ret->engine);
OPENSSL_free(ret);
return NULL;
}
}
#endif
ret->flags = ret->meth->flags;
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
#if 0
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);
}
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
if (r->engine)
ENGINE_finish(r->engine);
#endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
OPENSSL_free(r);
}
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;
EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
}
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));
}