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1059 lines
29 KiB
1059 lines
29 KiB
/* crypto/ec/ec_lib.c */ |
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/* |
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* Originally written by Bodo Moeller for the OpenSSL project. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
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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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* notice, this list of conditions and the following disclaimer. |
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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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/* ==================================================================== |
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
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* Binary polynomial ECC support in OpenSSL originally developed by |
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* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
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*/ |
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|
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#include <string.h> |
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|
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#include <openssl/err.h> |
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#include <openssl/opensslv.h> |
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|
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#include "ec_lcl.h" |
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|
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const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; |
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|
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/* functions for EC_GROUP objects */ |
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|
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EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) |
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{ |
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EC_GROUP *ret; |
|
|
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if (meth == NULL) { |
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ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); |
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return NULL; |
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} |
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if (meth->group_init == 0) { |
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ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
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return NULL; |
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} |
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|
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ret = OPENSSL_malloc(sizeof *ret); |
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if (ret == NULL) { |
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ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); |
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return NULL; |
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} |
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|
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ret->meth = meth; |
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|
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ret->extra_data = NULL; |
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|
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ret->generator = NULL; |
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BN_init(&ret->order); |
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BN_init(&ret->cofactor); |
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|
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ret->curve_name = 0; |
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ret->asn1_flag = 0; |
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ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
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|
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ret->seed = NULL; |
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ret->seed_len = 0; |
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|
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if (!meth->group_init(ret)) { |
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OPENSSL_free(ret); |
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return NULL; |
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} |
|
|
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return ret; |
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} |
|
|
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void EC_GROUP_free(EC_GROUP *group) |
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{ |
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if (!group) |
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return; |
|
|
|
if (group->meth->group_finish != 0) |
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group->meth->group_finish(group); |
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|
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EC_EX_DATA_free_all_data(&group->extra_data); |
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|
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if (group->generator != NULL) |
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EC_POINT_free(group->generator); |
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BN_free(&group->order); |
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BN_free(&group->cofactor); |
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|
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if (group->seed) |
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OPENSSL_free(group->seed); |
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|
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OPENSSL_free(group); |
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} |
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|
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void EC_GROUP_clear_free(EC_GROUP *group) |
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{ |
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if (!group) |
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return; |
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|
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if (group->meth->group_clear_finish != 0) |
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group->meth->group_clear_finish(group); |
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else if (group->meth->group_finish != 0) |
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group->meth->group_finish(group); |
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|
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EC_EX_DATA_clear_free_all_data(&group->extra_data); |
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|
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if (group->generator != NULL) |
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EC_POINT_clear_free(group->generator); |
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BN_clear_free(&group->order); |
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BN_clear_free(&group->cofactor); |
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|
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if (group->seed) { |
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OPENSSL_cleanse(group->seed, group->seed_len); |
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OPENSSL_free(group->seed); |
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} |
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|
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OPENSSL_cleanse(group, sizeof *group); |
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OPENSSL_free(group); |
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} |
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|
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int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) |
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{ |
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EC_EXTRA_DATA *d; |
|
|
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if (dest->meth->group_copy == 0) { |
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ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
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return 0; |
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} |
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if (dest->meth != src->meth) { |
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ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); |
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return 0; |
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} |
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if (dest == src) |
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return 1; |
|
|
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EC_EX_DATA_free_all_data(&dest->extra_data); |
|
|
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for (d = src->extra_data; d != NULL; d = d->next) { |
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void *t = d->dup_func(d->data); |
|
|
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if (t == NULL) |
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return 0; |
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if (!EC_EX_DATA_set_data |
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(&dest->extra_data, t, d->dup_func, d->free_func, |
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d->clear_free_func)) |
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return 0; |
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} |
|
|
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if (src->generator != NULL) { |
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if (dest->generator == NULL) { |
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dest->generator = EC_POINT_new(dest); |
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if (dest->generator == NULL) |
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return 0; |
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} |
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if (!EC_POINT_copy(dest->generator, src->generator)) |
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return 0; |
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} else { |
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/* src->generator == NULL */ |
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if (dest->generator != NULL) { |
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EC_POINT_clear_free(dest->generator); |
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dest->generator = NULL; |
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} |
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} |
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|
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if (!BN_copy(&dest->order, &src->order)) |
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return 0; |
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if (!BN_copy(&dest->cofactor, &src->cofactor)) |
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return 0; |
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|
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dest->curve_name = src->curve_name; |
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dest->asn1_flag = src->asn1_flag; |
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dest->asn1_form = src->asn1_form; |
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|
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if (src->seed) { |
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if (dest->seed) |
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OPENSSL_free(dest->seed); |
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dest->seed = OPENSSL_malloc(src->seed_len); |
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if (dest->seed == NULL) |
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return 0; |
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if (!memcpy(dest->seed, src->seed, src->seed_len)) |
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return 0; |
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dest->seed_len = src->seed_len; |
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} else { |
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if (dest->seed) |
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OPENSSL_free(dest->seed); |
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dest->seed = NULL; |
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dest->seed_len = 0; |
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} |
|
|
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return dest->meth->group_copy(dest, src); |
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} |
|
|
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EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
|
{ |
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EC_GROUP *t = NULL; |
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int ok = 0; |
|
|
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if (a == NULL) |
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return NULL; |
|
|
|
if ((t = EC_GROUP_new(a->meth)) == NULL) |
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return (NULL); |
|
if (!EC_GROUP_copy(t, a)) |
|
goto err; |
|
|
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ok = 1; |
|
|
|
err: |
|
if (!ok) { |
|
if (t) |
|
EC_GROUP_free(t); |
|
return NULL; |
|
} else |
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return t; |
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} |
|
|
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const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
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{ |
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return group->meth; |
|
} |
|
|
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int EC_METHOD_get_field_type(const EC_METHOD *meth) |
|
{ |
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return meth->field_type; |
|
} |
|
|
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int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, |
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const BIGNUM *order, const BIGNUM *cofactor) |
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{ |
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if (generator == NULL) { |
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ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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|
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if (group->generator == NULL) { |
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group->generator = EC_POINT_new(group); |
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if (group->generator == NULL) |
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return 0; |
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} |
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if (!EC_POINT_copy(group->generator, generator)) |
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return 0; |
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|
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if (order != NULL) { |
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if (!BN_copy(&group->order, order)) |
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return 0; |
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} else |
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BN_zero(&group->order); |
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|
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if (cofactor != NULL) { |
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if (!BN_copy(&group->cofactor, cofactor)) |
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return 0; |
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} else |
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BN_zero(&group->cofactor); |
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|
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return 1; |
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} |
|
|
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const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
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{ |
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return group->generator; |
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} |
|
|
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int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
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{ |
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if (!BN_copy(order, &group->order)) |
|
return 0; |
|
|
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return !BN_is_zero(order); |
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} |
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|
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int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
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BN_CTX *ctx) |
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{ |
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if (!BN_copy(cofactor, &group->cofactor)) |
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return 0; |
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|
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return !BN_is_zero(&group->cofactor); |
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} |
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|
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void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
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{ |
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group->curve_name = nid; |
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} |
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int EC_GROUP_get_curve_name(const EC_GROUP *group) |
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{ |
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return group->curve_name; |
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} |
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|
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void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
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{ |
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group->asn1_flag = flag; |
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} |
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|
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int EC_GROUP_get_asn1_flag(const EC_GROUP *group) |
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{ |
|
return group->asn1_flag; |
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} |
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|
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void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
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point_conversion_form_t form) |
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{ |
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group->asn1_form = form; |
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} |
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|
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point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP |
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*group) |
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{ |
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return group->asn1_form; |
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} |
|
|
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size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
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{ |
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if (group->seed) { |
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OPENSSL_free(group->seed); |
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group->seed = NULL; |
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group->seed_len = 0; |
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} |
|
|
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if (!len || !p) |
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return 1; |
|
|
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if ((group->seed = OPENSSL_malloc(len)) == NULL) |
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return 0; |
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memcpy(group->seed, p, len); |
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group->seed_len = len; |
|
|
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return len; |
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} |
|
|
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unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) |
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{ |
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return group->seed; |
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} |
|
|
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size_t EC_GROUP_get_seed_len(const EC_GROUP *group) |
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{ |
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return group->seed_len; |
|
} |
|
|
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int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
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const BIGNUM *b, BN_CTX *ctx) |
|
{ |
|
if (group->meth->group_set_curve == 0) { |
|
ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_set_curve(group, p, a, b, ctx); |
|
} |
|
|
|
int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, |
|
BIGNUM *b, BN_CTX *ctx) |
|
{ |
|
if (group->meth->group_get_curve == 0) { |
|
ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_get_curve(group, p, a, b, ctx); |
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} |
|
|
|
#ifndef OPENSSL_NO_EC2M |
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int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, |
|
const BIGNUM *b, BN_CTX *ctx) |
|
{ |
|
if (group->meth->group_set_curve == 0) { |
|
ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_set_curve(group, p, a, b, ctx); |
|
} |
|
|
|
int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, |
|
BIGNUM *b, BN_CTX *ctx) |
|
{ |
|
if (group->meth->group_get_curve == 0) { |
|
ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_get_curve(group, p, a, b, ctx); |
|
} |
|
#endif |
|
|
|
int EC_GROUP_get_degree(const EC_GROUP *group) |
|
{ |
|
if (group->meth->group_get_degree == 0) { |
|
ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_get_degree(group); |
|
} |
|
|
|
int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
|
{ |
|
if (group->meth->group_check_discriminant == 0) { |
|
ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
return group->meth->group_check_discriminant(group, ctx); |
|
} |
|
|
|
int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
|
{ |
|
int r = 0; |
|
BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; |
|
BN_CTX *ctx_new = NULL; |
|
|
|
/* compare the field types */ |
|
if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != |
|
EC_METHOD_get_field_type(EC_GROUP_method_of(b))) |
|
return 1; |
|
/* compare the curve name (if present in both) */ |
|
if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && |
|
EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b)) |
|
return 1; |
|
|
|
if (!ctx) |
|
ctx_new = ctx = BN_CTX_new(); |
|
if (!ctx) |
|
return -1; |
|
|
|
BN_CTX_start(ctx); |
|
a1 = BN_CTX_get(ctx); |
|
a2 = BN_CTX_get(ctx); |
|
a3 = BN_CTX_get(ctx); |
|
b1 = BN_CTX_get(ctx); |
|
b2 = BN_CTX_get(ctx); |
|
b3 = BN_CTX_get(ctx); |
|
if (!b3) { |
|
BN_CTX_end(ctx); |
|
if (ctx_new) |
|
BN_CTX_free(ctx); |
|
return -1; |
|
} |
|
|
|
/* |
|
* XXX This approach assumes that the external representation of curves |
|
* over the same field type is the same. |
|
*/ |
|
if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || |
|
!b->meth->group_get_curve(b, b1, b2, b3, ctx)) |
|
r = 1; |
|
|
|
if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) |
|
r = 1; |
|
|
|
/* XXX EC_POINT_cmp() assumes that the methods are equal */ |
|
if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), |
|
EC_GROUP_get0_generator(b), ctx)) |
|
r = 1; |
|
|
|
if (!r) { |
|
/* compare the order and cofactor */ |
|
if (!EC_GROUP_get_order(a, a1, ctx) || |
|
!EC_GROUP_get_order(b, b1, ctx) || |
|
!EC_GROUP_get_cofactor(a, a2, ctx) || |
|
!EC_GROUP_get_cofactor(b, b2, ctx)) { |
|
BN_CTX_end(ctx); |
|
if (ctx_new) |
|
BN_CTX_free(ctx); |
|
return -1; |
|
} |
|
if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) |
|
r = 1; |
|
} |
|
|
|
BN_CTX_end(ctx); |
|
if (ctx_new) |
|
BN_CTX_free(ctx); |
|
|
|
return r; |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
|
void *(*dup_func) (void *), |
|
void (*free_func) (void *), |
|
void (*clear_free_func) (void *)) |
|
{ |
|
EC_EXTRA_DATA *d; |
|
|
|
if (ex_data == NULL) |
|
return 0; |
|
|
|
for (d = *ex_data; d != NULL; d = d->next) { |
|
if (d->dup_func == dup_func && d->free_func == free_func |
|
&& d->clear_free_func == clear_free_func) { |
|
ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); |
|
return 0; |
|
} |
|
} |
|
|
|
if (data == NULL) |
|
/* no explicit entry needed */ |
|
return 1; |
|
|
|
d = OPENSSL_malloc(sizeof *d); |
|
if (d == NULL) |
|
return 0; |
|
|
|
d->data = data; |
|
d->dup_func = dup_func; |
|
d->free_func = free_func; |
|
d->clear_free_func = clear_free_func; |
|
|
|
d->next = *ex_data; |
|
*ex_data = d; |
|
|
|
return 1; |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
|
void *(*dup_func) (void *), |
|
void (*free_func) (void *), |
|
void (*clear_free_func) (void *)) |
|
{ |
|
const EC_EXTRA_DATA *d; |
|
|
|
for (d = ex_data; d != NULL; d = d->next) { |
|
if (d->dup_func == dup_func && d->free_func == free_func |
|
&& d->clear_free_func == clear_free_func) |
|
return d->data; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
|
void *(*dup_func) (void *), |
|
void (*free_func) (void *), |
|
void (*clear_free_func) (void *)) |
|
{ |
|
EC_EXTRA_DATA **p; |
|
|
|
if (ex_data == NULL) |
|
return; |
|
|
|
for (p = ex_data; *p != NULL; p = &((*p)->next)) { |
|
if ((*p)->dup_func == dup_func && (*p)->free_func == free_func |
|
&& (*p)->clear_free_func == clear_free_func) { |
|
EC_EXTRA_DATA *next = (*p)->next; |
|
|
|
(*p)->free_func((*p)->data); |
|
OPENSSL_free(*p); |
|
|
|
*p = next; |
|
return; |
|
} |
|
} |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
|
void *(*dup_func) (void *), |
|
void (*free_func) (void *), |
|
void (*clear_free_func) (void *)) |
|
{ |
|
EC_EXTRA_DATA **p; |
|
|
|
if (ex_data == NULL) |
|
return; |
|
|
|
for (p = ex_data; *p != NULL; p = &((*p)->next)) { |
|
if ((*p)->dup_func == dup_func && (*p)->free_func == free_func |
|
&& (*p)->clear_free_func == clear_free_func) { |
|
EC_EXTRA_DATA *next = (*p)->next; |
|
|
|
(*p)->clear_free_func((*p)->data); |
|
OPENSSL_free(*p); |
|
|
|
*p = next; |
|
return; |
|
} |
|
} |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
|
{ |
|
EC_EXTRA_DATA *d; |
|
|
|
if (ex_data == NULL) |
|
return; |
|
|
|
d = *ex_data; |
|
while (d) { |
|
EC_EXTRA_DATA *next = d->next; |
|
|
|
d->free_func(d->data); |
|
OPENSSL_free(d); |
|
|
|
d = next; |
|
} |
|
*ex_data = NULL; |
|
} |
|
|
|
/* this has 'package' visibility */ |
|
void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
|
{ |
|
EC_EXTRA_DATA *d; |
|
|
|
if (ex_data == NULL) |
|
return; |
|
|
|
d = *ex_data; |
|
while (d) { |
|
EC_EXTRA_DATA *next = d->next; |
|
|
|
d->clear_free_func(d->data); |
|
OPENSSL_free(d); |
|
|
|
d = next; |
|
} |
|
*ex_data = NULL; |
|
} |
|
|
|
/* functions for EC_POINT objects */ |
|
|
|
EC_POINT *EC_POINT_new(const EC_GROUP *group) |
|
{ |
|
EC_POINT *ret; |
|
|
|
if (group == NULL) { |
|
ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); |
|
return NULL; |
|
} |
|
if (group->meth->point_init == 0) { |
|
ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return NULL; |
|
} |
|
|
|
ret = OPENSSL_malloc(sizeof *ret); |
|
if (ret == NULL) { |
|
ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); |
|
return NULL; |
|
} |
|
|
|
ret->meth = group->meth; |
|
|
|
if (!ret->meth->point_init(ret)) { |
|
OPENSSL_free(ret); |
|
return NULL; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void EC_POINT_free(EC_POINT *point) |
|
{ |
|
if (!point) |
|
return; |
|
|
|
if (point->meth->point_finish != 0) |
|
point->meth->point_finish(point); |
|
OPENSSL_free(point); |
|
} |
|
|
|
void EC_POINT_clear_free(EC_POINT *point) |
|
{ |
|
if (!point) |
|
return; |
|
|
|
if (point->meth->point_clear_finish != 0) |
|
point->meth->point_clear_finish(point); |
|
else if (point->meth->point_finish != 0) |
|
point->meth->point_finish(point); |
|
OPENSSL_cleanse(point, sizeof *point); |
|
OPENSSL_free(point); |
|
} |
|
|
|
int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) |
|
{ |
|
if (dest->meth->point_copy == 0) { |
|
ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (dest->meth != src->meth) { |
|
ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
if (dest == src) |
|
return 1; |
|
return dest->meth->point_copy(dest, src); |
|
} |
|
|
|
EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
|
{ |
|
EC_POINT *t; |
|
int r; |
|
|
|
if (a == NULL) |
|
return NULL; |
|
|
|
t = EC_POINT_new(group); |
|
if (t == NULL) |
|
return (NULL); |
|
r = EC_POINT_copy(t, a); |
|
if (!r) { |
|
EC_POINT_free(t); |
|
return NULL; |
|
} else |
|
return t; |
|
} |
|
|
|
const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
|
{ |
|
return point->meth; |
|
} |
|
|
|
int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
|
{ |
|
if (group->meth->point_set_to_infinity == 0) { |
|
ECerr(EC_F_EC_POINT_SET_TO_INFINITY, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_set_to_infinity(group, point); |
|
} |
|
|
|
int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, |
|
EC_POINT *point, const BIGNUM *x, |
|
const BIGNUM *y, const BIGNUM *z, |
|
BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { |
|
ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, |
|
y, z, ctx); |
|
} |
|
|
|
int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, |
|
const EC_POINT *point, BIGNUM *x, |
|
BIGNUM *y, BIGNUM *z, |
|
BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_get_Jprojective_coordinates_GFp == 0) { |
|
ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, |
|
y, z, ctx); |
|
} |
|
|
|
int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, |
|
EC_POINT *point, const BIGNUM *x, |
|
const BIGNUM *y, BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_set_affine_coordinates == 0) { |
|
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
|
} |
|
|
|
#ifndef OPENSSL_NO_EC2M |
|
int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, |
|
EC_POINT *point, const BIGNUM *x, |
|
const BIGNUM *y, BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_set_affine_coordinates == 0) { |
|
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
|
} |
|
#endif |
|
|
|
int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
|
const EC_POINT *point, BIGNUM *x, |
|
BIGNUM *y, BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_get_affine_coordinates == 0) { |
|
ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
|
} |
|
|
|
#ifndef OPENSSL_NO_EC2M |
|
int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, |
|
const EC_POINT *point, BIGNUM *x, |
|
BIGNUM *y, BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_get_affine_coordinates == 0) { |
|
ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, |
|
EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
|
} |
|
#endif |
|
|
|
int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
|
const EC_POINT *b, BN_CTX *ctx) |
|
{ |
|
if (group->meth->add == 0) { |
|
ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if ((group->meth != r->meth) || (r->meth != a->meth) |
|
|| (a->meth != b->meth)) { |
|
ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->add(group, r, a, b, ctx); |
|
} |
|
|
|
int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
|
BN_CTX *ctx) |
|
{ |
|
if (group->meth->dbl == 0) { |
|
ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if ((group->meth != r->meth) || (r->meth != a->meth)) { |
|
ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->dbl(group, r, a, ctx); |
|
} |
|
|
|
int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
|
{ |
|
if (group->meth->invert == 0) { |
|
ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != a->meth) { |
|
ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->invert(group, a, ctx); |
|
} |
|
|
|
int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
|
{ |
|
if (group->meth->is_at_infinity == 0) { |
|
ECerr(EC_F_EC_POINT_IS_AT_INFINITY, |
|
ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->is_at_infinity(group, point); |
|
} |
|
|
|
/* |
|
* Check whether an EC_POINT is on the curve or not. Note that the return |
|
* value for this function should NOT be treated as a boolean. Return values: |
|
* 1: The point is on the curve |
|
* 0: The point is not on the curve |
|
* -1: An error occurred |
|
*/ |
|
int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
|
BN_CTX *ctx) |
|
{ |
|
if (group->meth->is_on_curve == 0) { |
|
ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->is_on_curve(group, point, ctx); |
|
} |
|
|
|
int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, |
|
BN_CTX *ctx) |
|
{ |
|
if (group->meth->point_cmp == 0) { |
|
ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return -1; |
|
} |
|
if ((group->meth != a->meth) || (a->meth != b->meth)) { |
|
ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); |
|
return -1; |
|
} |
|
return group->meth->point_cmp(group, a, b, ctx); |
|
} |
|
|
|
int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
|
{ |
|
if (group->meth->make_affine == 0) { |
|
ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
if (group->meth != point->meth) { |
|
ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
return group->meth->make_affine(group, point, ctx); |
|
} |
|
|
|
int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, |
|
EC_POINT *points[], BN_CTX *ctx) |
|
{ |
|
size_t i; |
|
|
|
if (group->meth->points_make_affine == 0) { |
|
ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
|
return 0; |
|
} |
|
for (i = 0; i < num; i++) { |
|
if (group->meth != points[i]->meth) { |
|
ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); |
|
return 0; |
|
} |
|
} |
|
return group->meth->points_make_affine(group, num, points, ctx); |
|
} |
|
|
|
/* |
|
* Functions for point multiplication. If group->meth->mul is 0, we use the |
|
* wNAF-based implementations in ec_mult.c; otherwise we dispatch through |
|
* methods. |
|
*/ |
|
|
|
int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, |
|
size_t num, const EC_POINT *points[], |
|
const BIGNUM *scalars[], BN_CTX *ctx) |
|
{ |
|
if (group->meth->mul == 0) |
|
/* use default */ |
|
return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); |
|
|
|
return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
|
} |
|
|
|
int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, |
|
const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
|
{ |
|
/* just a convenient interface to EC_POINTs_mul() */ |
|
|
|
const EC_POINT *points[1]; |
|
const BIGNUM *scalars[1]; |
|
|
|
points[0] = point; |
|
scalars[0] = p_scalar; |
|
|
|
return EC_POINTs_mul(group, r, g_scalar, |
|
(point != NULL |
|
&& p_scalar != NULL), points, scalars, ctx); |
|
} |
|
|
|
int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) |
|
{ |
|
if (group->meth->mul == 0) |
|
/* use default */ |
|
return ec_wNAF_precompute_mult(group, ctx); |
|
|
|
if (group->meth->precompute_mult != 0) |
|
return group->meth->precompute_mult(group, ctx); |
|
else |
|
return 1; /* nothing to do, so report success */ |
|
} |
|
|
|
int EC_GROUP_have_precompute_mult(const EC_GROUP *group) |
|
{ |
|
if (group->meth->mul == 0) |
|
/* use default */ |
|
return ec_wNAF_have_precompute_mult(group); |
|
|
|
if (group->meth->have_precompute_mult != 0) |
|
return group->meth->have_precompute_mult(group); |
|
else |
|
return 0; /* cannot tell whether precomputation has |
|
* been performed */ |
|
}
|
|
|