| /* crypto/ec/ec_lib.c */ |
| /* |
| * Originally written by Bodo Moeller for the OpenSSL project. |
| */ |
| /* ==================================================================== |
| * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * openssl-core@openssl.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| /* ==================================================================== |
| * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| * Binary polynomial ECC support in OpenSSL originally developed by |
| * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
| */ |
| |
| #include <string.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/opensslv.h> |
| |
| #include "ec_lcl.h" |
| |
| int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, |
| EC_POINT *point, const BIGNUM *x, |
| int y_bit, BN_CTX *ctx) |
| { |
| if (group->meth->point_set_compressed_coordinates == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, |
| ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (group->meth != point->meth) { |
| ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, |
| EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ec_GFp_simple_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, |
| EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ec_GF2m_simple_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| #endif |
| } |
| return group->meth->point_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| } |
| |
| #ifndef OPENSSL_NO_EC2M |
| int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, |
| EC_POINT *point, const BIGNUM *x, |
| int y_bit, BN_CTX *ctx) |
| { |
| if (group->meth->point_set_compressed_coordinates == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, |
| ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (group->meth != point->meth) { |
| ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, |
| EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ec_GFp_simple_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| else |
| return ec_GF2m_simple_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| } |
| return group->meth->point_set_compressed_coordinates(group, point, x, |
| y_bit, ctx); |
| } |
| #endif |
| |
| size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, |
| point_conversion_form_t form, unsigned char *buf, |
| size_t len, BN_CTX *ctx) |
| { |
| if (group->meth->point2oct == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (group->meth != point->meth) { |
| ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ec_GFp_simple_point2oct(group, point, form, buf, len, ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ec_GF2m_simple_point2oct(group, point, |
| form, buf, len, ctx); |
| #endif |
| } |
| |
| return group->meth->point2oct(group, point, form, buf, len, ctx); |
| } |
| |
| int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, |
| const unsigned char *buf, size_t len, BN_CTX *ctx) |
| { |
| if (group->meth->oct2point == 0 |
| && !(group->meth->flags & EC_FLAGS_DEFAULT_OCT)) { |
| ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| if (group->meth != point->meth) { |
| ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); |
| return 0; |
| } |
| if (group->meth->flags & EC_FLAGS_DEFAULT_OCT) { |
| if (group->meth->field_type == NID_X9_62_prime_field) |
| return ec_GFp_simple_oct2point(group, point, buf, len, ctx); |
| else |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_GF2M_NOT_SUPPORTED); |
| return 0; |
| } |
| #else |
| return ec_GF2m_simple_oct2point(group, point, buf, len, ctx); |
| #endif |
| } |
| return group->meth->oct2point(group, point, buf, len, ctx); |
| } |
