ecp_nist.c revision 280297
178556Sobrien/* crypto/ec/ecp_nist.c */ 278556Sobrien/* 378556Sobrien * Written by Nils Larsch for the OpenSSL project. 478556Sobrien */ 578556Sobrien/* ==================================================================== 678556Sobrien * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. 778556Sobrien * 878556Sobrien * Redistribution and use in source and binary forms, with or without 978556Sobrien * modification, are permitted provided that the following conditions 1078556Sobrien * are met: 11167974Sdelphij * 1278556Sobrien * 1. Redistributions of source code must retain the above copyright 1378556Sobrien * notice, this list of conditions and the following disclaimer. 1478556Sobrien * 1578556Sobrien * 2. Redistributions in binary form must reproduce the above copyright 16167974Sdelphij * notice, this list of conditions and the following disclaimer in 17167974Sdelphij * the documentation and/or other materials provided with the 18167974Sdelphij * distribution. 19167974Sdelphij * 20351007Sdelphij * 3. All advertising materials mentioning features or use of this 21351007Sdelphij * software must display the following acknowledgment: 22167974Sdelphij * "This product includes software developed by the OpenSSL Project 23167974Sdelphij * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 24167974Sdelphij * 25167974Sdelphij * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26167974Sdelphij * endorse or promote products derived from this software without 27167974Sdelphij * prior written permission. For written permission, please contact 28167974Sdelphij * openssl-core@openssl.org. 29167974Sdelphij * 30167974Sdelphij * 5. Products derived from this software may not be called "OpenSSL" 3178556Sobrien * nor may "OpenSSL" appear in their names without prior written 3278556Sobrien * permission of the OpenSSL Project. 3378556Sobrien * 3478556Sobrien * 6. Redistributions of any form whatsoever must retain the following 3578556Sobrien * acknowledgment: 3678556Sobrien * "This product includes software developed by the OpenSSL Project 3778556Sobrien * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 3878556Sobrien * 3978556Sobrien * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4078556Sobrien * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4178556Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4278556Sobrien * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4378556Sobrien * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4478556Sobrien * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4578556Sobrien * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4678556Sobrien * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4778556Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4878556Sobrien * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4978556Sobrien * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5078556Sobrien * OF THE POSSIBILITY OF SUCH DAMAGE. 5178556Sobrien * ==================================================================== 5278556Sobrien * 5378556Sobrien * This product includes cryptographic software written by Eric Young 5478556Sobrien * (eay@cryptsoft.com). This product includes software written by Tim 5578556Sobrien * Hudson (tjh@cryptsoft.com). 5678556Sobrien * 5778556Sobrien */ 5878556Sobrien/* ==================================================================== 5978556Sobrien * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 6078556Sobrien * Portions of this software developed by SUN MICROSYSTEMS, INC., 6178556Sobrien * and contributed to the OpenSSL project. 6278556Sobrien */ 6378556Sobrien 6478556Sobrien#include <limits.h> 6578556Sobrien 6678556Sobrien#include <openssl/err.h> 6778556Sobrien#include <openssl/obj_mac.h> 6878556Sobrien#include "ec_lcl.h" 6978556Sobrien 7078556Sobrien#ifdef OPENSSL_FIPS 7178556Sobrien# include <openssl/fips.h> 7278556Sobrien#endif 7378556Sobrien 7478556Sobrienconst EC_METHOD *EC_GFp_nist_method(void) 7578556Sobrien{ 7678556Sobrien static const EC_METHOD ret = { 7778556Sobrien EC_FLAGS_DEFAULT_OCT, 7878556Sobrien NID_X9_62_prime_field, 7978556Sobrien ec_GFp_simple_group_init, 8078556Sobrien ec_GFp_simple_group_finish, 8178556Sobrien ec_GFp_simple_group_clear_finish, 8278556Sobrien ec_GFp_nist_group_copy, 8378556Sobrien ec_GFp_nist_group_set_curve, 8478556Sobrien ec_GFp_simple_group_get_curve, 8578556Sobrien ec_GFp_simple_group_get_degree, 8678556Sobrien ec_GFp_simple_group_check_discriminant, 8778556Sobrien ec_GFp_simple_point_init, 8878556Sobrien ec_GFp_simple_point_finish, 8978556Sobrien ec_GFp_simple_point_clear_finish, 9078556Sobrien ec_GFp_simple_point_copy, 9178556Sobrien ec_GFp_simple_point_set_to_infinity, 9278556Sobrien ec_GFp_simple_set_Jprojective_coordinates_GFp, 9378556Sobrien ec_GFp_simple_get_Jprojective_coordinates_GFp, 9478556Sobrien ec_GFp_simple_point_set_affine_coordinates, 9578556Sobrien ec_GFp_simple_point_get_affine_coordinates, 9678556Sobrien 0, 0, 0, 9778556Sobrien ec_GFp_simple_add, 9878556Sobrien ec_GFp_simple_dbl, 9978556Sobrien ec_GFp_simple_invert, 10078556Sobrien ec_GFp_simple_is_at_infinity, 10178556Sobrien ec_GFp_simple_is_on_curve, 10278556Sobrien ec_GFp_simple_cmp, 10378556Sobrien ec_GFp_simple_make_affine, 10478556Sobrien ec_GFp_simple_points_make_affine, 10578556Sobrien 0 /* mul */ , 10678556Sobrien 0 /* precompute_mult */ , 10778556Sobrien 0 /* have_precompute_mult */ , 10878556Sobrien ec_GFp_nist_field_mul, 10978556Sobrien ec_GFp_nist_field_sqr, 11078556Sobrien 0 /* field_div */ , 11178556Sobrien 0 /* field_encode */ , 11278556Sobrien 0 /* field_decode */ , 11378556Sobrien 0 /* field_set_to_one */ 11478556Sobrien }; 11578556Sobrien 11678556Sobrien#ifdef OPENSSL_FIPS 11778556Sobrien if (FIPS_mode()) 11878556Sobrien return fips_ec_gfp_nist_method(); 11978556Sobrien#endif 12078556Sobrien 12178556Sobrien return &ret; 12278556Sobrien} 12378556Sobrien 12478556Sobrienint ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src) 12578556Sobrien{ 12678556Sobrien dest->field_mod_func = src->field_mod_func; 12778556Sobrien 12878556Sobrien return ec_GFp_simple_group_copy(dest, src); 12978556Sobrien} 13078556Sobrien 13178556Sobrienint ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p, 13278556Sobrien const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) 13378556Sobrien{ 13478556Sobrien int ret = 0; 13578556Sobrien BN_CTX *new_ctx = NULL; 13678556Sobrien BIGNUM *tmp_bn; 13778556Sobrien 13878556Sobrien if (ctx == NULL) 13978556Sobrien if ((ctx = new_ctx = BN_CTX_new()) == NULL) 14078556Sobrien return 0; 14178556Sobrien 142 BN_CTX_start(ctx); 143 if ((tmp_bn = BN_CTX_get(ctx)) == NULL) 144 goto err; 145 146 if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0) 147 group->field_mod_func = BN_nist_mod_192; 148 else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0) 149 group->field_mod_func = BN_nist_mod_224; 150 else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) 151 group->field_mod_func = BN_nist_mod_256; 152 else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) 153 group->field_mod_func = BN_nist_mod_384; 154 else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0) 155 group->field_mod_func = BN_nist_mod_521; 156 else { 157 ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME); 158 goto err; 159 } 160 161 ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); 162 163 err: 164 BN_CTX_end(ctx); 165 if (new_ctx != NULL) 166 BN_CTX_free(new_ctx); 167 return ret; 168} 169 170int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, 171 const BIGNUM *b, BN_CTX *ctx) 172{ 173 int ret = 0; 174 BN_CTX *ctx_new = NULL; 175 176 if (!group || !r || !a || !b) { 177 ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER); 178 goto err; 179 } 180 if (!ctx) 181 if ((ctx_new = ctx = BN_CTX_new()) == NULL) 182 goto err; 183 184 if (!BN_mul(r, a, b, ctx)) 185 goto err; 186 if (!group->field_mod_func(r, r, &group->field, ctx)) 187 goto err; 188 189 ret = 1; 190 err: 191 if (ctx_new) 192 BN_CTX_free(ctx_new); 193 return ret; 194} 195 196int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, 197 BN_CTX *ctx) 198{ 199 int ret = 0; 200 BN_CTX *ctx_new = NULL; 201 202 if (!group || !r || !a) { 203 ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER); 204 goto err; 205 } 206 if (!ctx) 207 if ((ctx_new = ctx = BN_CTX_new()) == NULL) 208 goto err; 209 210 if (!BN_sqr(r, a, ctx)) 211 goto err; 212 if (!group->field_mod_func(r, r, &group->field, ctx)) 213 goto err; 214 215 ret = 1; 216 err: 217 if (ctx_new) 218 BN_CTX_free(ctx_new); 219 return ret; 220} 221