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pineappleEA
2020-12-28 15:15:37 +00:00
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242
externals/libressl/crypto/ecdh/ech_lib.c vendored Executable file
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/* $OpenBSD: ech_lib.c,v 1.14 2018/04/14 07:09:21 tb Exp $ */
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
*
* The Elliptic Curve Public-Key Crypto Library (ECC Code) included
* herein is developed by SUN MICROSYSTEMS, INC., and is contributed
* to the OpenSSL project.
*
* The ECC Code is licensed pursuant to the OpenSSL open source
* license provided below.
*
* The ECDH software is originally written by Douglas Stebila of
* Sun Microsystems Laboratories.
*
*/
/* ====================================================================
* Copyright (c) 1998-2003 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 "ech_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>
static const ECDH_METHOD *default_ECDH_method = NULL;
static void *ecdh_data_new(void);
static void *ecdh_data_dup(void *);
static void ecdh_data_free(void *);
void
ECDH_set_default_method(const ECDH_METHOD *meth)
{
default_ECDH_method = meth;
}
const ECDH_METHOD *
ECDH_get_default_method(void)
{
if (!default_ECDH_method) {
default_ECDH_method = ECDH_OpenSSL();
}
return default_ECDH_method;
}
int
ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
{
ECDH_DATA *ecdh;
ecdh = ecdh_check(eckey);
if (ecdh == NULL)
return 0;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(ecdh->engine);
ecdh->engine = NULL;
#endif
ecdh->meth = meth;
return 1;
}
static ECDH_DATA *
ECDH_DATA_new_method(ENGINE *engine)
{
ECDH_DATA *ret;
ret = malloc(sizeof(ECDH_DATA));
if (ret == NULL) {
ECDHerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->init = NULL;
ret->meth = ECDH_get_default_method();
ret->engine = engine;
#ifndef OPENSSL_NO_ENGINE
if (!ret->engine)
ret->engine = ENGINE_get_default_ECDH();
if (ret->engine) {
ret->meth = ENGINE_get_ECDH(ret->engine);
if (ret->meth == NULL) {
ECDHerror(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_ECDH, ret, &ret->ex_data);
return (ret);
}
static void *
ecdh_data_new(void)
{
return (void *)ECDH_DATA_new_method(NULL);
}
static void *
ecdh_data_dup(void *data)
{
ECDH_DATA *r = (ECDH_DATA *)data;
/* XXX: dummy operation */
if (r == NULL)
return NULL;
return (void *)ecdh_data_new();
}
void
ecdh_data_free(void *data)
{
ECDH_DATA *r = (ECDH_DATA *)data;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(r->engine);
#endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
freezero(r, sizeof(ECDH_DATA));
}
ECDH_DATA *
ecdh_check(EC_KEY *key)
{
ECDH_DATA *ecdh_data;
void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
ecdh_data_free, ecdh_data_free);
if (data == NULL) {
ecdh_data = (ECDH_DATA *)ecdh_data_new();
if (ecdh_data == NULL)
return NULL;
data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
ecdh_data_dup, ecdh_data_free, ecdh_data_free);
if (data != NULL) {
/* Another thread raced us to install the key_method
* data and won. */
ecdh_data_free(ecdh_data);
ecdh_data = (ECDH_DATA *)data;
}
} else
ecdh_data = (ECDH_DATA *)data;
return ecdh_data;
}
int
ECDH_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_ECDH, argl, argp,
new_func, dup_func, free_func);
}
int
ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
{
ECDH_DATA *ecdh;
ecdh = ecdh_check(d);
if (ecdh == NULL)
return 0;
return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg));
}
void *
ECDH_get_ex_data(EC_KEY *d, int idx)
{
ECDH_DATA *ecdh;
ecdh = ecdh_check(d);
if (ecdh == NULL)
return NULL;
return (CRYPTO_get_ex_data(&ecdh->ex_data, idx));
}
int
ECDH_size(const EC_KEY *d)
{
return ((EC_GROUP_get_degree(EC_KEY_get0_group(d)) + 7) / 8);
}