/* 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 #include #include #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); }