193 lines
7.6 KiB
C
193 lines
7.6 KiB
C
/* 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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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/opensslv.h>
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#include "ec_lcl.h"
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int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
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EC_POINT *point, const BIGNUM *x,
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int y_bit, BN_CTX *ctx)
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{
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if (group->meth->point_set_compressed_coordinates == 0
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&& !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
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ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
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ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (group->meth != point->meth) {
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ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
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EC_R_INCOMPATIBLE_OBJECTS);
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return 0;
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}
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if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
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if (group->meth->field_type == NID_X9_62_prime_field)
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return ec_GFp_simple_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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else
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#ifdef OPENSSL_NO_EC2M
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{
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ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP,
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EC_R_GF2M_NOT_SUPPORTED);
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return 0;
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}
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#else
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return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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#endif
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}
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return group->meth->point_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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}
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#ifndef OPENSSL_NO_EC2M
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int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
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EC_POINT *point, const BIGNUM *x,
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int y_bit, BN_CTX *ctx)
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{
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if (group->meth->point_set_compressed_coordinates == 0
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&& !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
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ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M,
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ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (group->meth != point->meth) {
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ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M,
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EC_R_INCOMPATIBLE_OBJECTS);
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return 0;
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}
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if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
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if (group->meth->field_type == NID_X9_62_prime_field)
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return ec_GFp_simple_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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else
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return ec_GF2m_simple_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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}
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return group->meth->point_set_compressed_coordinates(group, point, x,
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y_bit, ctx);
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}
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#endif
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size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point,
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point_conversion_form_t form, unsigned char *buf,
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size_t len, BN_CTX *ctx)
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{
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if (group->meth->point2oct == 0
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&& !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
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ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (group->meth != point->meth) {
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ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
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return 0;
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}
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if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
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if (group->meth->field_type == NID_X9_62_prime_field)
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return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx);
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else
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#ifdef OPENSSL_NO_EC2M
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{
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ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED);
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return 0;
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}
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#else
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return ec_GF2m_simple_point2oct(group, point,
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form, buf, len, ctx);
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#endif
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}
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return group->meth->point2oct(group, point, form, buf, len, ctx);
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}
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int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
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const unsigned char *buf, size_t len, BN_CTX *ctx)
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{
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if (group->meth->oct2point == 0
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&& !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) {
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ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return 0;
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}
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if (group->meth != point->meth) {
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ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
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return 0;
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}
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if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) {
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if (group->meth->field_type == NID_X9_62_prime_field)
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return ec_GFp_simple_oct2point(group, point, buf, len, ctx);
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else
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#ifdef OPENSSL_NO_EC2M
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{
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ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED);
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return 0;
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}
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#else
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return ec_GF2m_simple_oct2point(group, point, buf, len, ctx);
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#endif
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}
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return group->meth->oct2point(group, point, buf, len, ctx);
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}
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