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192 lines
7.6 KiB
192 lines
7.6 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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#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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