2011-02-14 16:52:12 +00:00
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/*
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2016-05-17 18:51:04 +00:00
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* Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
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2017-06-15 14:16:46 +00:00
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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2011-02-14 16:52:12 +00:00
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*
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2016-05-17 18:51:04 +00:00
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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2011-02-14 16:52:12 +00:00
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*/
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2016-05-17 18:51:04 +00:00
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2011-02-14 16:52:12 +00:00
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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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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#ifdef OPENSSL_NO_EC2M
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#else
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#endif
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2015-01-22 03:40:55 +00:00
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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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2011-02-14 16:52:12 +00:00
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#ifndef OPENSSL_NO_EC2M
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2015-01-22 03:40:55 +00:00
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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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2011-02-14 16:52:12 +00:00
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#endif
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#ifdef OPENSSL_NO_EC2M
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#else
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2015-01-22 03:40:55 +00:00
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return ec_GF2m_simple_point2oct(group, point,
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form, buf, len, ctx);
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2011-03-10 01:00:30 +00:00
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#endif
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2015-01-22 03:40:55 +00:00
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}
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2011-02-14 16:52:12 +00:00
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2015-01-22 03:40:55 +00:00
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return group->meth->point2oct(group, point, form, buf, len, ctx);
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}
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2011-02-14 16:52:12 +00:00
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int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#ifdef OPENSSL_NO_EC2M
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2015-01-22 03:40:55 +00:00
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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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2011-03-10 01:00:30 +00:00
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#else
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2015-01-22 03:40:55 +00:00
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return ec_GF2m_simple_oct2point(group, point, buf, len, ctx);
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2011-03-10 01:00:30 +00:00
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#endif
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2015-01-22 03:40:55 +00:00
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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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2015-12-12 01:04:25 +00:00
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size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
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point_conversion_form_t form,
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unsigned char **pbuf, BN_CTX *ctx)
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{
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size_t len;
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unsigned char *buf;
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2018-04-03 15:31:16 +00:00
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2015-12-12 01:04:25 +00:00
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len = EC_POINT_point2oct(group, point, form, NULL, 0, NULL);
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if (len == 0)
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return 0;
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2018-04-03 15:31:16 +00:00
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if ((buf = OPENSSL_malloc(len)) == NULL) {
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ECerr(EC_F_EC_POINT_POINT2BUF, ERR_R_MALLOC_FAILURE);
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2015-12-12 01:04:25 +00:00
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return 0;
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2018-04-03 15:31:16 +00:00
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}
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2015-12-12 01:04:25 +00:00
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len = EC_POINT_point2oct(group, point, form, buf, len, ctx);
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if (len == 0) {
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OPENSSL_free(buf);
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return 0;
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}
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*pbuf = buf;
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return len;
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}
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