Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/ec/ecp_nist.c */ |
| 2 | /* |
| 3 | * Written by Nils Larsch for the OpenSSL project. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * openssl-core@openssl.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | /* ==================================================================== |
| 59 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 60 | * Portions of this software developed by SUN MICROSYSTEMS, INC., |
| 61 | * and contributed to the OpenSSL project. |
| 62 | */ |
| 63 | |
| 64 | #include <limits.h> |
| 65 | |
| 66 | #include <openssl/err.h> |
| 67 | #include <openssl/obj_mac.h> |
| 68 | #include "ec_lcl.h" |
| 69 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 70 | const EC_METHOD *EC_GFp_nist_method(void) |
| 71 | { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 72 | static const EC_METHOD ret = { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 73 | NID_X9_62_prime_field, |
| 74 | ec_GFp_simple_group_init, |
| 75 | ec_GFp_simple_group_finish, |
| 76 | ec_GFp_simple_group_clear_finish, |
| 77 | ec_GFp_nist_group_copy, |
| 78 | ec_GFp_nist_group_set_curve, |
| 79 | ec_GFp_simple_group_get_curve, |
| 80 | ec_GFp_simple_group_get_degree, |
| 81 | ec_GFp_simple_group_check_discriminant, |
| 82 | ec_GFp_simple_point_init, |
| 83 | ec_GFp_simple_point_finish, |
| 84 | ec_GFp_simple_point_clear_finish, |
| 85 | ec_GFp_simple_point_copy, |
| 86 | ec_GFp_simple_point_set_to_infinity, |
| 87 | ec_GFp_simple_set_Jprojective_coordinates_GFp, |
| 88 | ec_GFp_simple_get_Jprojective_coordinates_GFp, |
| 89 | ec_GFp_simple_point_set_affine_coordinates, |
| 90 | ec_GFp_simple_point_get_affine_coordinates, |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 91 | ec_GFp_simple_set_compressed_coordinates, |
| 92 | ec_GFp_simple_point2oct, |
| 93 | ec_GFp_simple_oct2point, |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 94 | ec_GFp_simple_add, |
| 95 | ec_GFp_simple_dbl, |
| 96 | ec_GFp_simple_invert, |
| 97 | ec_GFp_simple_is_at_infinity, |
| 98 | ec_GFp_simple_is_on_curve, |
| 99 | ec_GFp_simple_cmp, |
| 100 | ec_GFp_simple_make_affine, |
| 101 | ec_GFp_simple_points_make_affine, |
| 102 | 0 /* mul */, |
| 103 | 0 /* precompute_mult */, |
| 104 | 0 /* have_precompute_mult */, |
| 105 | ec_GFp_nist_field_mul, |
| 106 | ec_GFp_nist_field_sqr, |
| 107 | 0 /* field_div */, |
| 108 | 0 /* field_encode */, |
| 109 | 0 /* field_decode */, |
| 110 | 0 /* field_set_to_one */ }; |
| 111 | |
| 112 | return &ret; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src) |
| 116 | { |
| 117 | dest->field_mod_func = src->field_mod_func; |
| 118 | |
| 119 | return ec_GFp_simple_group_copy(dest, src); |
| 120 | } |
| 121 | |
| 122 | int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p, |
| 123 | const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
| 124 | { |
| 125 | int ret = 0; |
| 126 | BN_CTX *new_ctx = NULL; |
| 127 | BIGNUM *tmp_bn; |
| 128 | |
| 129 | if (ctx == NULL) |
| 130 | if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0; |
| 131 | |
| 132 | BN_CTX_start(ctx); |
| 133 | if ((tmp_bn = BN_CTX_get(ctx)) == NULL) goto err; |
| 134 | |
| 135 | if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0) |
| 136 | group->field_mod_func = BN_nist_mod_192; |
| 137 | else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0) |
| 138 | group->field_mod_func = BN_nist_mod_224; |
| 139 | else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) |
| 140 | group->field_mod_func = BN_nist_mod_256; |
| 141 | else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) |
| 142 | group->field_mod_func = BN_nist_mod_384; |
| 143 | else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0) |
| 144 | group->field_mod_func = BN_nist_mod_521; |
| 145 | else |
| 146 | { |
| 147 | ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME); |
| 148 | goto err; |
| 149 | } |
| 150 | |
| 151 | ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); |
| 152 | |
| 153 | err: |
| 154 | BN_CTX_end(ctx); |
| 155 | if (new_ctx != NULL) |
| 156 | BN_CTX_free(new_ctx); |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, |
| 162 | const BIGNUM *b, BN_CTX *ctx) |
| 163 | { |
| 164 | int ret=0; |
| 165 | BN_CTX *ctx_new=NULL; |
| 166 | |
| 167 | if (!group || !r || !a || !b) |
| 168 | { |
| 169 | ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER); |
| 170 | goto err; |
| 171 | } |
| 172 | if (!ctx) |
| 173 | if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err; |
| 174 | |
| 175 | if (!BN_mul(r, a, b, ctx)) goto err; |
| 176 | if (!group->field_mod_func(r, r, &group->field, ctx)) |
| 177 | goto err; |
| 178 | |
| 179 | ret=1; |
| 180 | err: |
| 181 | if (ctx_new) |
| 182 | BN_CTX_free(ctx_new); |
| 183 | return ret; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, |
| 188 | BN_CTX *ctx) |
| 189 | { |
| 190 | int ret=0; |
| 191 | BN_CTX *ctx_new=NULL; |
| 192 | |
| 193 | if (!group || !r || !a) |
| 194 | { |
| 195 | ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER); |
| 196 | goto err; |
| 197 | } |
| 198 | if (!ctx) |
| 199 | if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err; |
| 200 | |
| 201 | if (!BN_sqr(r, a, ctx)) goto err; |
| 202 | if (!group->field_mod_func(r, r, &group->field, ctx)) |
| 203 | goto err; |
| 204 | |
| 205 | ret=1; |
| 206 | err: |
| 207 | if (ctx_new) |
| 208 | BN_CTX_free(ctx_new); |
| 209 | return ret; |
| 210 | } |