2002-08-07 10:49:54 +00:00
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/*
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* Written by Nils Larsch for the OpenSSL project.
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*/
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/* ====================================================================
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2005-05-16 10:11:04 +00:00
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* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
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2002-08-07 10:49:54 +00:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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2015-01-22 03:40:55 +00:00
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* notice, this list of conditions and the following disclaimer.
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2002-08-07 10:49:54 +00:00
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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2002-08-09 08:43:04 +00:00
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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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2015-01-22 03:40:55 +00:00
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* Portions originally developed by SUN MICROSYSTEMS, INC., and
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2002-08-09 08:43:04 +00:00
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* contributed to the OpenSSL project.
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*/
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2002-08-07 10:49:54 +00:00
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2015-09-11 18:56:32 +00:00
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#include <internal/cryptlib.h>
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2002-08-10 01:36:14 +00:00
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#include <string.h>
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2002-08-07 10:49:54 +00:00
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#include "ec_lcl.h"
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#include <openssl/err.h>
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2015-12-27 14:59:04 +00:00
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#ifndef OPENSSL_NO_ENGINE
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2015-10-23 17:46:58 +00:00
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# include <openssl/engine.h>
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#endif
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2002-08-07 10:49:54 +00:00
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EC_KEY *EC_KEY_new(void)
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2015-01-22 03:40:55 +00:00
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{
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2015-10-19 13:38:43 +00:00
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return EC_KEY_new_method(NULL);
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2015-01-22 03:40:55 +00:00
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}
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2002-08-07 10:49:54 +00:00
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2005-05-16 10:11:04 +00:00
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EC_KEY *EC_KEY_new_by_curve_name(int nid)
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2015-01-22 03:40:55 +00:00
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{
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EC_KEY *ret = EC_KEY_new();
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if (ret == NULL)
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return NULL;
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ret->group = EC_GROUP_new_by_curve_name(nid);
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if (ret->group == NULL) {
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EC_KEY_free(ret);
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return NULL;
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}
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2015-12-09 13:10:36 +00:00
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if (ret->meth->set_group != NULL
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&& ret->meth->set_group(ret, ret->group) == 0) {
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2015-10-25 13:09:50 +00:00
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EC_KEY_free(ret);
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return NULL;
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}
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2015-01-22 03:40:55 +00:00
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return ret;
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}
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2002-08-07 10:49:54 +00:00
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void EC_KEY_free(EC_KEY *r)
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2015-01-22 03:40:55 +00:00
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{
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int i;
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2002-08-07 10:49:54 +00:00
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2015-01-22 03:40:55 +00:00
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if (r == NULL)
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return;
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2002-08-07 10:49:54 +00:00
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2015-01-22 03:40:55 +00:00
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i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
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2016-01-30 17:04:25 +00:00
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REF_PRINT_COUNT("EC_KEY", r);
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2015-01-22 03:40:55 +00:00
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if (i > 0)
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return;
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2016-01-30 17:04:25 +00:00
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REF_ASSERT_ISNT(i < 0);
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2002-08-07 10:49:54 +00:00
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2015-12-09 13:10:36 +00:00
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if (r->meth->finish != NULL)
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2015-10-23 18:10:24 +00:00
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r->meth->finish(r);
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2015-10-23 17:46:58 +00:00
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#ifndef OPENSSL_NO_ENGINE
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2016-02-25 17:09:06 +00:00
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ENGINE_finish(r->engine);
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2015-10-23 17:46:58 +00:00
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#endif
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|
2016-02-01 18:15:57 +00:00
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if (r->group && r->group->meth->keyfinish)
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r->group->meth->keyfinish(r);
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|
2016-01-05 18:06:03 +00:00
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data);
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2015-03-25 22:35:24 +00:00
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EC_GROUP_free(r->group);
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EC_POINT_free(r->pub_key);
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2015-05-01 01:37:06 +00:00
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BN_clear_free(r->priv_key);
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2002-08-07 10:49:54 +00:00
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|
2015-04-30 21:57:32 +00:00
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OPENSSL_clear_free((void *)r, sizeof(EC_KEY));
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2015-01-22 03:40:55 +00:00
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}
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2002-08-07 10:49:54 +00:00
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|
2016-01-05 18:06:03 +00:00
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EC_KEY *EC_KEY_copy(EC_KEY *dest, EC_KEY *src)
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2015-01-22 03:40:55 +00:00
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{
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if (dest == NULL || src == NULL) {
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ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER);
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return NULL;
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}
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2015-10-23 18:19:57 +00:00
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if (src->meth != dest->meth) {
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2015-12-09 13:10:36 +00:00
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if (dest->meth->finish != NULL)
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2015-10-23 18:19:57 +00:00
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dest->meth->finish(dest);
|
2016-02-01 18:15:57 +00:00
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if (dest->group && dest->group->meth->keyfinish)
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dest->group->meth->keyfinish(dest);
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2015-10-23 18:19:57 +00:00
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#ifndef OPENSSL_NO_ENGINE
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2016-02-25 17:09:06 +00:00
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if (ENGINE_finish(dest->engine) == 0)
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2015-10-23 18:19:57 +00:00
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return 0;
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dest->engine = NULL;
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#endif
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}
|
2015-01-22 03:40:55 +00:00
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/* copy the parameters */
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2015-12-09 13:10:36 +00:00
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if (src->group != NULL) {
|
2015-01-22 03:40:55 +00:00
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const EC_METHOD *meth = EC_GROUP_method_of(src->group);
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/* clear the old group */
|
2015-03-25 22:35:24 +00:00
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EC_GROUP_free(dest->group);
|
2015-01-22 03:40:55 +00:00
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dest->group = EC_GROUP_new(meth);
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if (dest->group == NULL)
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return NULL;
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|
|
if (!EC_GROUP_copy(dest->group, src->group))
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|
return NULL;
|
|
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|
}
|
|
|
|
/* copy the public key */
|
2015-12-09 13:10:36 +00:00
|
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|
if (src->pub_key != NULL && src->group != NULL) {
|
2015-03-25 22:35:24 +00:00
|
|
|
EC_POINT_free(dest->pub_key);
|
2015-01-22 03:40:55 +00:00
|
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|
dest->pub_key = EC_POINT_new(src->group);
|
|
|
|
if (dest->pub_key == NULL)
|
|
|
|
return NULL;
|
|
|
|
if (!EC_POINT_copy(dest->pub_key, src->pub_key))
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/* copy the private key */
|
2015-12-09 13:10:36 +00:00
|
|
|
if (src->priv_key != NULL) {
|
2015-01-22 03:40:55 +00:00
|
|
|
if (dest->priv_key == NULL) {
|
|
|
|
dest->priv_key = BN_new();
|
|
|
|
if (dest->priv_key == NULL)
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (!BN_copy(dest->priv_key, src->priv_key))
|
|
|
|
return NULL;
|
2016-02-01 18:15:57 +00:00
|
|
|
if (src->group->meth->keycopy
|
|
|
|
&& src->group->meth->keycopy(dest, src) == 0)
|
|
|
|
return NULL;
|
2015-01-22 03:40:55 +00:00
|
|
|
}
|
|
|
|
|
2016-02-01 18:15:57 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
/* copy the rest */
|
|
|
|
dest->enc_flag = src->enc_flag;
|
|
|
|
dest->conv_form = src->conv_form;
|
|
|
|
dest->version = src->version;
|
|
|
|
dest->flags = src->flags;
|
2016-01-05 18:06:03 +00:00
|
|
|
if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY,
|
|
|
|
&dest->ex_data, &src->ex_data))
|
|
|
|
return NULL;
|
2015-01-22 03:40:55 +00:00
|
|
|
|
2015-10-23 18:19:57 +00:00
|
|
|
if (src->meth != dest->meth) {
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
2015-12-09 13:10:36 +00:00
|
|
|
if (src->engine != NULL && ENGINE_init(src->engine) == 0)
|
|
|
|
return NULL;
|
2015-10-23 18:19:57 +00:00
|
|
|
dest->engine = src->engine;
|
|
|
|
#endif
|
|
|
|
dest->meth = src->meth;
|
|
|
|
}
|
|
|
|
|
2015-12-09 13:10:36 +00:00
|
|
|
if (src->meth->copy != NULL && src->meth->copy(dest, src) == 0)
|
|
|
|
return NULL;
|
2015-10-23 18:19:57 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
return dest;
|
|
|
|
}
|
2002-08-07 10:49:54 +00:00
|
|
|
|
2016-01-05 18:06:03 +00:00
|
|
|
EC_KEY *EC_KEY_dup(EC_KEY *ec_key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
2015-10-23 18:19:57 +00:00
|
|
|
EC_KEY *ret = EC_KEY_new_method(ec_key->engine);
|
2016-01-05 18:06:03 +00:00
|
|
|
|
2015-01-22 03:40:55 +00:00
|
|
|
if (ret == NULL)
|
|
|
|
return NULL;
|
|
|
|
if (EC_KEY_copy(ret, ec_key) == NULL) {
|
|
|
|
EC_KEY_free(ret);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
2002-08-07 10:49:54 +00:00
|
|
|
|
2002-08-09 08:43:04 +00:00
|
|
|
int EC_KEY_up_ref(EC_KEY *r)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
|
2016-01-30 17:04:25 +00:00
|
|
|
|
|
|
|
REF_PRINT_COUNT("EC_KEY", r);
|
|
|
|
REF_ASSERT_ISNT(i < 2);
|
2015-01-22 03:40:55 +00:00
|
|
|
return ((i > 1) ? 1 : 0);
|
|
|
|
}
|
2002-08-09 08:43:04 +00:00
|
|
|
|
2002-08-07 10:49:54 +00:00
|
|
|
int EC_KEY_generate_key(EC_KEY *eckey)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
2015-12-09 13:10:36 +00:00
|
|
|
if (eckey == NULL || eckey->group == NULL) {
|
2015-01-22 03:40:55 +00:00
|
|
|
ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
|
|
|
|
return 0;
|
|
|
|
}
|
2015-12-09 13:10:36 +00:00
|
|
|
if (eckey->meth->keygen != NULL)
|
2015-10-22 13:53:23 +00:00
|
|
|
return eckey->meth->keygen(eckey);
|
|
|
|
ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ossl_ec_key_gen(EC_KEY *eckey)
|
2016-02-28 17:47:06 +00:00
|
|
|
{
|
2016-02-28 17:48:48 +00:00
|
|
|
OPENSSL_assert(eckey->group->meth->keygen != NULL);
|
2016-02-28 17:47:06 +00:00
|
|
|
return eckey->group->meth->keygen(eckey);
|
|
|
|
}
|
|
|
|
|
|
|
|
int ec_key_simple_generate_key(EC_KEY *eckey)
|
2015-10-22 13:53:23 +00:00
|
|
|
{
|
|
|
|
int ok = 0;
|
|
|
|
BN_CTX *ctx = NULL;
|
2016-01-31 16:34:07 +00:00
|
|
|
BIGNUM *priv_key = NULL;
|
|
|
|
const BIGNUM *order = NULL;
|
2015-10-22 13:53:23 +00:00
|
|
|
EC_POINT *pub_key = NULL;
|
2015-01-22 03:40:55 +00:00
|
|
|
|
|
|
|
if ((ctx = BN_CTX_new()) == NULL)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
if (eckey->priv_key == NULL) {
|
|
|
|
priv_key = BN_new();
|
|
|
|
if (priv_key == NULL)
|
|
|
|
goto err;
|
|
|
|
} else
|
|
|
|
priv_key = eckey->priv_key;
|
|
|
|
|
2016-01-31 16:34:07 +00:00
|
|
|
order = EC_GROUP_get0_order(eckey->group);
|
|
|
|
if (order == NULL)
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
|
|
|
|
do
|
|
|
|
if (!BN_rand_range(priv_key, order))
|
|
|
|
goto err;
|
|
|
|
while (BN_is_zero(priv_key)) ;
|
|
|
|
|
|
|
|
if (eckey->pub_key == NULL) {
|
|
|
|
pub_key = EC_POINT_new(eckey->group);
|
|
|
|
if (pub_key == NULL)
|
|
|
|
goto err;
|
|
|
|
} else
|
|
|
|
pub_key = eckey->pub_key;
|
|
|
|
|
|
|
|
if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
eckey->priv_key = priv_key;
|
|
|
|
eckey->pub_key = pub_key;
|
|
|
|
|
|
|
|
ok = 1;
|
|
|
|
|
|
|
|
err:
|
2015-03-25 22:35:24 +00:00
|
|
|
if (eckey->pub_key == NULL)
|
2015-01-22 03:40:55 +00:00
|
|
|
EC_POINT_free(pub_key);
|
2015-05-01 01:37:06 +00:00
|
|
|
if (eckey->priv_key != priv_key)
|
2015-01-22 03:40:55 +00:00
|
|
|
BN_free(priv_key);
|
2015-05-01 01:37:06 +00:00
|
|
|
BN_CTX_free(ctx);
|
2016-02-28 17:47:06 +00:00
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ec_key_simple_generate_public_key(EC_KEY *eckey)
|
|
|
|
{
|
|
|
|
return EC_POINT_mul(eckey->group, eckey->pub_key, eckey->priv_key, NULL,
|
|
|
|
NULL, NULL);
|
2015-01-22 03:40:55 +00:00
|
|
|
}
|
2002-08-07 10:49:54 +00:00
|
|
|
|
|
|
|
int EC_KEY_check_key(const EC_KEY *eckey)
|
2016-02-28 17:47:06 +00:00
|
|
|
{
|
|
|
|
if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
|
|
|
|
ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (eckey->group->meth->keycheck == NULL) {
|
|
|
|
ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return eckey->group->meth->keycheck(eckey);
|
|
|
|
}
|
|
|
|
|
|
|
|
int ec_key_simple_check_key(const EC_KEY *eckey)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
int ok = 0;
|
|
|
|
BN_CTX *ctx = NULL;
|
|
|
|
const BIGNUM *order = NULL;
|
|
|
|
EC_POINT *point = NULL;
|
|
|
|
|
2015-12-09 13:10:36 +00:00
|
|
|
if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
|
2015-01-22 03:40:55 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_AT_INFINITY);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((ctx = BN_CTX_new()) == NULL)
|
|
|
|
goto err;
|
|
|
|
if ((point = EC_POINT_new(eckey->group)) == NULL)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
/* testing whether the pub_key is on the elliptic curve */
|
2015-06-04 13:22:00 +00:00
|
|
|
if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
/* testing whether pub_key * order is the point at infinity */
|
|
|
|
order = eckey->group->order;
|
|
|
|
if (BN_is_zero(order)) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
if (!EC_POINT_is_at_infinity(eckey->group, point)) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* in case the priv_key is present : check if generator * priv_key ==
|
|
|
|
* pub_key
|
|
|
|
*/
|
2015-12-09 13:10:36 +00:00
|
|
|
if (eckey->priv_key != NULL) {
|
2015-01-22 03:40:55 +00:00
|
|
|
if (BN_cmp(eckey->priv_key, order) >= 0) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
|
|
|
|
NULL, NULL, ctx)) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err:
|
2015-05-01 01:37:06 +00:00
|
|
|
BN_CTX_free(ctx);
|
2015-03-25 22:35:24 +00:00
|
|
|
EC_POINT_free(point);
|
2016-02-28 17:47:06 +00:00
|
|
|
return ok;
|
2015-01-22 03:40:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
|
|
|
|
BIGNUM *y)
|
|
|
|
{
|
|
|
|
BN_CTX *ctx = NULL;
|
|
|
|
BIGNUM *tx, *ty;
|
|
|
|
EC_POINT *point = NULL;
|
2015-07-09 15:37:54 +00:00
|
|
|
int ok = 0;
|
|
|
|
#ifndef OPENSSL_NO_EC2M
|
|
|
|
int tmp_nid, is_char_two = 0;
|
|
|
|
#endif
|
2015-01-22 03:40:55 +00:00
|
|
|
|
2015-12-09 13:10:36 +00:00
|
|
|
if (key == NULL || key->group == NULL || x == NULL || y == NULL) {
|
2015-01-22 03:40:55 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
|
|
|
|
ERR_R_PASSED_NULL_PARAMETER);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
ctx = BN_CTX_new();
|
2015-10-30 11:12:26 +00:00
|
|
|
if (ctx == NULL)
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
|
|
|
|
point = EC_POINT_new(key->group);
|
|
|
|
|
2015-10-30 11:12:26 +00:00
|
|
|
if (point == NULL)
|
2015-01-22 03:40:55 +00:00
|
|
|
goto err;
|
|
|
|
|
2015-07-09 15:37:54 +00:00
|
|
|
tx = BN_CTX_get(ctx);
|
|
|
|
ty = BN_CTX_get(ctx);
|
2016-01-21 12:06:57 +00:00
|
|
|
if (ty == NULL)
|
|
|
|
goto err;
|
2015-07-09 15:37:54 +00:00
|
|
|
|
|
|
|
#ifndef OPENSSL_NO_EC2M
|
2015-01-22 03:40:55 +00:00
|
|
|
tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
|
|
|
|
|
|
|
|
if (tmp_nid == NID_X9_62_characteristic_two_field)
|
|
|
|
is_char_two = 1;
|
|
|
|
|
|
|
|
if (is_char_two) {
|
|
|
|
if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
|
|
|
|
x, y, ctx))
|
|
|
|
goto err;
|
|
|
|
if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
|
|
|
|
tx, ty, ctx))
|
|
|
|
goto err;
|
|
|
|
} else
|
2011-02-12 17:23:32 +00:00
|
|
|
#endif
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
|
|
|
|
x, y, ctx))
|
|
|
|
goto err;
|
|
|
|
if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
|
|
|
|
tx, ty, ctx))
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Check if retrieved coordinates match originals and are less than field
|
|
|
|
* order: if not values are out of range.
|
|
|
|
*/
|
|
|
|
if (BN_cmp(x, tx) || BN_cmp(y, ty)
|
|
|
|
|| (BN_cmp(x, key->group->field) >= 0)
|
|
|
|
|| (BN_cmp(y, key->group->field) >= 0)) {
|
|
|
|
ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
|
|
|
|
EC_R_COORDINATES_OUT_OF_RANGE);
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!EC_KEY_set_public_key(key, point))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
if (EC_KEY_check_key(key) == 0)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
ok = 1;
|
|
|
|
|
|
|
|
err:
|
2015-05-01 01:37:06 +00:00
|
|
|
BN_CTX_free(ctx);
|
2015-03-25 22:35:24 +00:00
|
|
|
EC_POINT_free(point);
|
2015-01-22 03:40:55 +00:00
|
|
|
return ok;
|
|
|
|
|
|
|
|
}
|
2011-01-24 16:07:40 +00:00
|
|
|
|
2005-05-16 10:11:04 +00:00
|
|
|
const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->group;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
2015-12-09 13:10:36 +00:00
|
|
|
if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0)
|
2015-10-25 13:09:50 +00:00
|
|
|
return 0;
|
2015-03-25 22:35:24 +00:00
|
|
|
EC_GROUP_free(key->group);
|
2015-01-22 03:40:55 +00:00
|
|
|
key->group = EC_GROUP_dup(group);
|
|
|
|
return (key->group == NULL) ? 0 : 1;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->priv_key;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
2016-02-01 18:15:57 +00:00
|
|
|
if (key->group == NULL || key->group->meth == NULL)
|
|
|
|
return 0;
|
|
|
|
if (key->group->meth->set_private
|
|
|
|
&& key->meth->set_private(key, priv_key) == 0)
|
|
|
|
return 0;
|
2015-12-09 13:10:36 +00:00
|
|
|
if (key->meth->set_private != NULL
|
|
|
|
&& key->meth->set_private(key, priv_key) == 0)
|
2015-10-25 13:09:50 +00:00
|
|
|
return 0;
|
2015-05-01 01:37:06 +00:00
|
|
|
BN_clear_free(key->priv_key);
|
2015-01-22 03:40:55 +00:00
|
|
|
key->priv_key = BN_dup(priv_key);
|
|
|
|
return (key->priv_key == NULL) ? 0 : 1;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->pub_key;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
2015-12-09 13:10:36 +00:00
|
|
|
if (key->meth->set_public != NULL
|
|
|
|
&& key->meth->set_public(key, pub_key) == 0)
|
2015-10-25 13:09:50 +00:00
|
|
|
return 0;
|
2015-03-25 22:35:24 +00:00
|
|
|
EC_POINT_free(key->pub_key);
|
2015-01-22 03:40:55 +00:00
|
|
|
key->pub_key = EC_POINT_dup(pub_key, key->group);
|
|
|
|
return (key->pub_key == NULL) ? 0 : 1;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
unsigned int EC_KEY_get_enc_flags(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->enc_flag;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
key->enc_flag = flags;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->conv_form;
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
key->conv_form = cform;
|
|
|
|
if (key->group != NULL)
|
|
|
|
EC_GROUP_set_point_conversion_form(key->group, cform);
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
void EC_KEY_set_asn1_flag(EC_KEY *key, int flag)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
if (key->group != NULL)
|
|
|
|
EC_GROUP_set_asn1_flag(key->group, flag);
|
|
|
|
}
|
2005-05-16 10:11:04 +00:00
|
|
|
|
|
|
|
int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
if (key->group == NULL)
|
|
|
|
return 0;
|
|
|
|
return EC_GROUP_precompute_mult(key->group, ctx);
|
|
|
|
}
|
2011-04-23 19:55:55 +00:00
|
|
|
|
|
|
|
int EC_KEY_get_flags(const EC_KEY *key)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
return key->flags;
|
|
|
|
}
|
2011-04-23 19:55:55 +00:00
|
|
|
|
|
|
|
void EC_KEY_set_flags(EC_KEY *key, int flags)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
key->flags |= flags;
|
|
|
|
}
|
2011-04-23 19:55:55 +00:00
|
|
|
|
|
|
|
void EC_KEY_clear_flags(EC_KEY *key, int flags)
|
2015-01-22 03:40:55 +00:00
|
|
|
{
|
|
|
|
key->flags &= ~flags;
|
|
|
|
}
|
2015-12-12 01:04:25 +00:00
|
|
|
|
|
|
|
size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
|
|
|
|
unsigned char **pbuf, BN_CTX *ctx)
|
|
|
|
{
|
|
|
|
if (key == NULL || key->pub_key == NULL || key->group == NULL)
|
|
|
|
return 0;
|
|
|
|
return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx);
|
|
|
|
}
|
|
|
|
|
|
|
|
int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
|
|
|
|
BN_CTX *ctx)
|
|
|
|
{
|
|
|
|
if (key == NULL || key->group == NULL)
|
|
|
|
return 0;
|
|
|
|
if (key->pub_key == NULL)
|
|
|
|
key->pub_key = EC_POINT_new(key->group);
|
|
|
|
if (key->pub_key == NULL)
|
|
|
|
return 0;
|
2016-02-17 15:05:27 +00:00
|
|
|
if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0)
|
|
|
|
return 0;
|
|
|
|
/*
|
|
|
|
* Save the point conversion form.
|
|
|
|
* For non-custom curves the first octet of the buffer (excluding
|
|
|
|
* the last significant bit) contains the point conversion form.
|
|
|
|
* EC_POINT_oct2point() has already performed sanity checking of
|
|
|
|
* the buffer so we know it is valid.
|
|
|
|
*/
|
|
|
|
if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0)
|
|
|
|
key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01);
|
|
|
|
return 1;
|
2015-12-12 01:04:25 +00:00
|
|
|
}
|
2016-02-01 15:34:13 +00:00
|
|
|
|
|
|
|
size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len)
|
|
|
|
{
|
|
|
|
if (eckey->group == NULL || eckey->group->meth == NULL)
|
|
|
|
return 0;
|
2016-02-28 17:47:06 +00:00
|
|
|
if (eckey->group->meth->priv2oct == NULL) {
|
|
|
|
ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return eckey->group->meth->priv2oct(eckey, buf, len);
|
|
|
|
}
|
|
|
|
|
|
|
|
size_t ec_key_simple_priv2oct(const EC_KEY *eckey,
|
|
|
|
unsigned char *buf, size_t len)
|
|
|
|
{
|
|
|
|
size_t buf_len;
|
2016-02-01 15:34:13 +00:00
|
|
|
|
|
|
|
buf_len = (EC_GROUP_get_degree(eckey->group) + 7) / 8;
|
|
|
|
if (eckey->priv_key == NULL)
|
|
|
|
return 0;
|
|
|
|
if (buf == NULL)
|
|
|
|
return buf_len;
|
|
|
|
else if (len < buf_len)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Octetstring may need leading zeros if BN is to short */
|
|
|
|
|
2016-02-03 18:51:02 +00:00
|
|
|
if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_PRIV2OCT, EC_R_BUFFER_TOO_SMALL);
|
2016-02-01 15:34:13 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return buf_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len)
|
|
|
|
{
|
|
|
|
if (eckey->group == NULL || eckey->group->meth == NULL)
|
|
|
|
return 0;
|
2016-02-28 17:47:06 +00:00
|
|
|
if (eckey->group->meth->oct2priv == NULL) {
|
|
|
|
ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return eckey->group->meth->oct2priv(eckey, buf, len);
|
|
|
|
}
|
2016-02-01 15:34:13 +00:00
|
|
|
|
2016-02-28 17:47:06 +00:00
|
|
|
int ec_key_simple_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len)
|
|
|
|
{
|
2016-02-01 15:34:13 +00:00
|
|
|
if (eckey->priv_key == NULL)
|
|
|
|
eckey->priv_key = BN_secure_new();
|
|
|
|
if (eckey->priv_key == NULL) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_MALLOC_FAILURE);
|
2016-02-01 15:34:13 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key);
|
|
|
|
if (eckey->priv_key == NULL) {
|
2016-02-28 17:47:06 +00:00
|
|
|
ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_BN_LIB);
|
2016-02-01 15:34:13 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
2016-02-04 23:18:57 +00:00
|
|
|
|
|
|
|
size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf)
|
|
|
|
{
|
|
|
|
size_t len;
|
|
|
|
unsigned char *buf;
|
|
|
|
len = EC_KEY_priv2oct(eckey, NULL, 0);
|
2016-02-26 19:11:46 +00:00
|
|
|
if (len == 0)
|
|
|
|
return 0;
|
2016-02-04 23:18:57 +00:00
|
|
|
buf = OPENSSL_malloc(len);
|
|
|
|
if (buf == NULL)
|
|
|
|
return 0;
|
|
|
|
len = EC_KEY_priv2oct(eckey, buf, len);
|
|
|
|
if (len == 0) {
|
|
|
|
OPENSSL_free(buf);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
*pbuf = buf;
|
|
|
|
return len;
|
|
|
|
}
|
2016-02-23 15:02:34 +00:00
|
|
|
|
|
|
|
int EC_KEY_can_sign(const EC_KEY *eckey)
|
|
|
|
{
|
|
|
|
if (eckey->group == NULL || eckey->group->meth == NULL
|
|
|
|
|| (eckey->group->meth->flags & EC_FLAGS_NO_SIGN))
|
|
|
|
return 0;
|
|
|
|
return 1;
|
|
|
|
}
|