ec_oct.c revision 238384
11553Srgrimes/* crypto/ec/ec_lib.c */ 21553Srgrimes/* 31553Srgrimes * Originally written by Bodo Moeller for the OpenSSL project. 41553Srgrimes */ 51553Srgrimes/* ==================================================================== 61553Srgrimes * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. 71553Srgrimes * 81553Srgrimes * Redistribution and use in source and binary forms, with or without 91553Srgrimes * modification, are permitted provided that the following conditions 101553Srgrimes * are met: 111553Srgrimes * 121553Srgrimes * 1. Redistributions of source code must retain the above copyright 131553Srgrimes * notice, this list of conditions and the following disclaimer. 141553Srgrimes * 151553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161553Srgrimes * notice, this list of conditions and the following disclaimer in 171553Srgrimes * the documentation and/or other materials provided with the 181553Srgrimes * distribution. 191553Srgrimes * 201553Srgrimes * 3. All advertising materials mentioning features or use of this 211553Srgrimes * software must display the following acknowledgment: 221553Srgrimes * "This product includes software developed by the OpenSSL Project 231553Srgrimes * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 241553Srgrimes * 251553Srgrimes * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 261553Srgrimes * endorse or promote products derived from this software without 271553Srgrimes * prior written permission. For written permission, please contact 281553Srgrimes * openssl-core@openssl.org. 291553Srgrimes * 301553Srgrimes * 5. Products derived from this software may not be called "OpenSSL" 311553Srgrimes * nor may "OpenSSL" appear in their names without prior written 321553Srgrimes * permission of the OpenSSL Project. 331553Srgrimes * 341553Srgrimes * 6. Redistributions of any form whatsoever must retain the following 351553Srgrimes * acknowledgment: 3629780Scharnier * "This product includes software developed by the OpenSSL Project 371553Srgrimes * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 381553Srgrimes * 391553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 401553Srgrimes * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 411553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4229780Scharnier * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4315637Sjoerg * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4429780Scharnier * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4529780Scharnier * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4650479Speter * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 471553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 481553Srgrimes * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 491553Srgrimes * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 501553Srgrimes * OF THE POSSIBILITY OF SUCH DAMAGE. 5129780Scharnier * ==================================================================== 521553Srgrimes * 5331492Swollman * This product includes cryptographic software written by Eric Young 5429780Scharnier * (eay@cryptsoft.com). This product includes software written by Tim 5529780Scharnier * Hudson (tjh@cryptsoft.com). 561553Srgrimes * 5729780Scharnier */ 5829780Scharnier/* ==================================================================== 591553Srgrimes * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 6029780Scharnier * Binary polynomial ECC support in OpenSSL originally developed by 611553Srgrimes * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 6250039Smdodd */ 6331492Swollman 641553Srgrimes#include <string.h> 651553Srgrimes 661553Srgrimes#include <openssl/err.h> 671553Srgrimes#include <openssl/opensslv.h> 6815637Sjoerg 6915637Sjoerg#include "ec_lcl.h" 7015637Sjoerg 7115637Sjoergint EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, 721553Srgrimes const BIGNUM *x, int y_bit, BN_CTX *ctx) 731553Srgrimes { 741553Srgrimes if (group->meth->point_set_compressed_coordinates == 0 751553Srgrimes && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) 7627618Simp { 7727618Simp ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 7839084Swollman return 0; 791553Srgrimes } 8039084Swollman if (group->meth != point->meth) 8139084Swollman { 8239084Swollman ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); 8339084Swollman return 0; 841553Srgrimes } 8578146Sgad if(group->meth->flags & EC_FLAGS_DEFAULT_OCT) 8678146Sgad { 8778146Sgad if (group->meth->field_type == NID_X9_62_prime_field) 8878146Sgad return ec_GFp_simple_set_compressed_coordinates( 8978146Sgad group, point, x, y_bit, ctx); 9078146Sgad else 911553Srgrimes#ifdef OPENSSL_NO_EC2M 921553Srgrimes { 9378146Sgad ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_GF2M_NOT_SUPPORTED); 941553Srgrimes return 0; 951553Srgrimes } 961553Srgrimes#else 9727618Simp return ec_GF2m_simple_set_compressed_coordinates( 9827618Simp group, point, x, y_bit, ctx); 9927618Simp#endif 1001553Srgrimes } 1011553Srgrimes return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); 1021553Srgrimes } 1031553Srgrimes 1041553Srgrimes#ifndef OPENSSL_NO_EC2M 1051553Srgrimesint EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, 1061553Srgrimes const BIGNUM *x, int y_bit, BN_CTX *ctx) 1071553Srgrimes { 1081553Srgrimes if (group->meth->point_set_compressed_coordinates == 0 1091553Srgrimes && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) 1101553Srgrimes { 1111553Srgrimes ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1121553Srgrimes return 0; 11315637Sjoerg } 1141553Srgrimes if (group->meth != point->meth) 1151553Srgrimes { 1161553Srgrimes ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); 11731492Swollman return 0; 11831492Swollman } 11931492Swollman if(group->meth->flags & EC_FLAGS_DEFAULT_OCT) 12031492Swollman { 1211553Srgrimes if (group->meth->field_type == NID_X9_62_prime_field) 1221553Srgrimes return ec_GFp_simple_set_compressed_coordinates( 1231553Srgrimes group, point, x, y_bit, ctx); 12450039Smdodd else 1251553Srgrimes return ec_GF2m_simple_set_compressed_coordinates( 1261553Srgrimes group, point, x, y_bit, ctx); 12750039Smdodd } 1281553Srgrimes return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); 1291553Srgrimes } 1301553Srgrimes#endif 1311553Srgrimes 13278146Sgadsize_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, 1331553Srgrimes unsigned char *buf, size_t len, BN_CTX *ctx) 13478146Sgad { 13550039Smdodd if (group->meth->point2oct == 0 1361553Srgrimes && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) 1371553Srgrimes { 13878146Sgad ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 13968400Sgad return 0; 14050039Smdodd } 14168400Sgad if (group->meth != point->meth) 14250039Smdodd { 14350039Smdodd ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); 1441553Srgrimes return 0; 1451553Srgrimes } 1461553Srgrimes if(group->meth->flags & EC_FLAGS_DEFAULT_OCT) 1471553Srgrimes { 14878146Sgad if (group->meth->field_type == NID_X9_62_prime_field) 1491553Srgrimes return ec_GFp_simple_point2oct(group, point, 1501553Srgrimes form, buf, len, ctx); 15150039Smdodd else 15250039Smdodd#ifdef OPENSSL_NO_EC2M 15350039Smdodd { 15450071Smdodd ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED); 15550039Smdodd return 0; 1561553Srgrimes } 1571553Srgrimes#else 1581553Srgrimes return ec_GF2m_simple_point2oct(group, point, 15950039Smdodd form, buf, len, ctx); 16050039Smdodd#endif 16150039Smdodd } 16250039Smdodd 16350039Smdodd return group->meth->point2oct(group, point, form, buf, len, ctx); 16450039Smdodd } 16550039Smdodd 16650039Smdodd 16750042Smdoddint EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, 16850039Smdodd const unsigned char *buf, size_t len, BN_CTX *ctx) 16950039Smdodd { 17062294Smph if (group->meth->oct2point == 0 17150039Smdodd && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) 17250077Smdodd { 17350071Smdodd ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 17450071Smdodd return 0; 17550039Smdodd } 17650039Smdodd if (group->meth != point->meth) 17750039Smdodd { 17850039Smdodd ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); 17950039Smdodd return 0; 18050039Smdodd } 18150039Smdodd if(group->meth->flags & EC_FLAGS_DEFAULT_OCT) 1821553Srgrimes { 18350039Smdodd if (group->meth->field_type == NID_X9_62_prime_field) 1841553Srgrimes return ec_GFp_simple_oct2point(group, point, 18550039Smdodd buf, len, ctx); 18650039Smdodd else 18750039Smdodd#ifdef OPENSSL_NO_EC2M 18850039Smdodd { 18950039Smdodd ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED); 1901553Srgrimes return 0; 1911553Srgrimes } 1921553Srgrimes#else 1931553Srgrimes return ec_GF2m_simple_oct2point(group, point, 1941553Srgrimes buf, len, ctx); 1951553Srgrimes#endif 1961553Srgrimes } 1971553Srgrimes return group->meth->oct2point(group, point, buf, len, ctx); 1981553Srgrimes } 19915637Sjoerg 2001553Srgrimes