| OLD | NEW |
|---|
| (Empty) |
| 1 /* crypto/ec/ecp_mont.c */ | |
| 2 /* | |
| 3 * Originally written by Bodo Moeller for the OpenSSL project. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 1998-2001 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 <openssl/err.h> | |
| 65 | |
| 66 #ifdef OPENSSL_FIPS | |
| 67 #include <openssl/fips.h> | |
| 68 #endif | |
| 69 | |
| 70 #include "ec_lcl.h" | |
| 71 | |
| 72 | |
| 73 const EC_METHOD *EC_GFp_mont_method(void) | |
| 74 { | |
| 75 #ifdef OPENSSL_FIPS | |
| 76 return fips_ec_gfp_mont_method(); | |
| 77 #else | |
| 78 static const EC_METHOD ret = { | |
| 79 EC_FLAGS_DEFAULT_OCT, | |
| 80 NID_X9_62_prime_field, | |
| 81 ec_GFp_mont_group_init, | |
| 82 ec_GFp_mont_group_finish, | |
| 83 ec_GFp_mont_group_clear_finish, | |
| 84 ec_GFp_mont_group_copy, | |
| 85 ec_GFp_mont_group_set_curve, | |
| 86 ec_GFp_simple_group_get_curve, | |
| 87 ec_GFp_simple_group_get_degree, | |
| 88 ec_GFp_simple_group_check_discriminant, | |
| 89 ec_GFp_simple_point_init, | |
| 90 ec_GFp_simple_point_finish, | |
| 91 ec_GFp_simple_point_clear_finish, | |
| 92 ec_GFp_simple_point_copy, | |
| 93 ec_GFp_simple_point_set_to_infinity, | |
| 94 ec_GFp_simple_set_Jprojective_coordinates_GFp, | |
| 95 ec_GFp_simple_get_Jprojective_coordinates_GFp, | |
| 96 ec_GFp_simple_point_set_affine_coordinates, | |
| 97 ec_GFp_simple_point_get_affine_coordinates, | |
| 98 0,0,0, | |
| 99 ec_GFp_simple_add, | |
| 100 ec_GFp_simple_dbl, | |
| 101 ec_GFp_simple_invert, | |
| 102 ec_GFp_simple_is_at_infinity, | |
| 103 ec_GFp_simple_is_on_curve, | |
| 104 ec_GFp_simple_cmp, | |
| 105 ec_GFp_simple_make_affine, | |
| 106 ec_GFp_simple_points_make_affine, | |
| 107 0 /* mul */, | |
| 108 0 /* precompute_mult */, | |
| 109 0 /* have_precompute_mult */, | |
| 110 ec_GFp_mont_field_mul, | |
| 111 ec_GFp_mont_field_sqr, | |
| 112 0 /* field_div */, | |
| 113 ec_GFp_mont_field_encode, | |
| 114 ec_GFp_mont_field_decode, | |
| 115 ec_GFp_mont_field_set_to_one }; | |
| 116 | |
| 117 return &ret; | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 | |
| 122 int ec_GFp_mont_group_init(EC_GROUP *group) | |
| 123 { | |
| 124 int ok; | |
| 125 | |
| 126 ok = ec_GFp_simple_group_init(group); | |
| 127 group->field_data1 = NULL; | |
| 128 group->field_data2 = NULL; | |
| 129 return ok; | |
| 130 } | |
| 131 | |
| 132 | |
| 133 void ec_GFp_mont_group_finish(EC_GROUP *group) | |
| 134 { | |
| 135 if (group->field_data1 != NULL) | |
| 136 { | |
| 137 BN_MONT_CTX_free(group->field_data1); | |
| 138 group->field_data1 = NULL; | |
| 139 } | |
| 140 if (group->field_data2 != NULL) | |
| 141 { | |
| 142 BN_free(group->field_data2); | |
| 143 group->field_data2 = NULL; | |
| 144 } | |
| 145 ec_GFp_simple_group_finish(group); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 void ec_GFp_mont_group_clear_finish(EC_GROUP *group) | |
| 150 { | |
| 151 if (group->field_data1 != NULL) | |
| 152 { | |
| 153 BN_MONT_CTX_free(group->field_data1); | |
| 154 group->field_data1 = NULL; | |
| 155 } | |
| 156 if (group->field_data2 != NULL) | |
| 157 { | |
| 158 BN_clear_free(group->field_data2); | |
| 159 group->field_data2 = NULL; | |
| 160 } | |
| 161 ec_GFp_simple_group_clear_finish(group); | |
| 162 } | |
| 163 | |
| 164 | |
| 165 int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src) | |
| 166 { | |
| 167 if (dest->field_data1 != NULL) | |
| 168 { | |
| 169 BN_MONT_CTX_free(dest->field_data1); | |
| 170 dest->field_data1 = NULL; | |
| 171 } | |
| 172 if (dest->field_data2 != NULL) | |
| 173 { | |
| 174 BN_clear_free(dest->field_data2); | |
| 175 dest->field_data2 = NULL; | |
| 176 } | |
| 177 | |
| 178 if (!ec_GFp_simple_group_copy(dest, src)) return 0; | |
| 179 | |
| 180 if (src->field_data1 != NULL) | |
| 181 { | |
| 182 dest->field_data1 = BN_MONT_CTX_new(); | |
| 183 if (dest->field_data1 == NULL) return 0; | |
| 184 if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1)) goto
err; | |
| 185 } | |
| 186 if (src->field_data2 != NULL) | |
| 187 { | |
| 188 dest->field_data2 = BN_dup(src->field_data2); | |
| 189 if (dest->field_data2 == NULL) goto err; | |
| 190 } | |
| 191 | |
| 192 return 1; | |
| 193 | |
| 194 err: | |
| 195 if (dest->field_data1 != NULL) | |
| 196 { | |
| 197 BN_MONT_CTX_free(dest->field_data1); | |
| 198 dest->field_data1 = NULL; | |
| 199 } | |
| 200 return 0; | |
| 201 } | |
| 202 | |
| 203 | |
| 204 int ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *
a, const BIGNUM *b, BN_CTX *ctx) | |
| 205 { | |
| 206 BN_CTX *new_ctx = NULL; | |
| 207 BN_MONT_CTX *mont = NULL; | |
| 208 BIGNUM *one = NULL; | |
| 209 int ret = 0; | |
| 210 | |
| 211 if (group->field_data1 != NULL) | |
| 212 { | |
| 213 BN_MONT_CTX_free(group->field_data1); | |
| 214 group->field_data1 = NULL; | |
| 215 } | |
| 216 if (group->field_data2 != NULL) | |
| 217 { | |
| 218 BN_free(group->field_data2); | |
| 219 group->field_data2 = NULL; | |
| 220 } | |
| 221 | |
| 222 if (ctx == NULL) | |
| 223 { | |
| 224 ctx = new_ctx = BN_CTX_new(); | |
| 225 if (ctx == NULL) | |
| 226 return 0; | |
| 227 } | |
| 228 | |
| 229 mont = BN_MONT_CTX_new(); | |
| 230 if (mont == NULL) goto err; | |
| 231 if (!BN_MONT_CTX_set(mont, p, ctx)) | |
| 232 { | |
| 233 ECerr(EC_F_EC_GFP_MONT_GROUP_SET_CURVE, ERR_R_BN_LIB); | |
| 234 goto err; | |
| 235 } | |
| 236 one = BN_new(); | |
| 237 if (one == NULL) goto err; | |
| 238 if (!BN_to_montgomery(one, BN_value_one(), mont, ctx)) goto err; | |
| 239 | |
| 240 group->field_data1 = mont; | |
| 241 mont = NULL; | |
| 242 group->field_data2 = one; | |
| 243 one = NULL; | |
| 244 | |
| 245 ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); | |
| 246 | |
| 247 if (!ret) | |
| 248 { | |
| 249 BN_MONT_CTX_free(group->field_data1); | |
| 250 group->field_data1 = NULL; | |
| 251 BN_free(group->field_data2); | |
| 252 group->field_data2 = NULL; | |
| 253 } | |
| 254 | |
| 255 err: | |
| 256 if (new_ctx != NULL) | |
| 257 BN_CTX_free(new_ctx); | |
| 258 if (mont != NULL) | |
| 259 BN_MONT_CTX_free(mont); | |
| 260 return ret; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, con
st BIGNUM *b, BN_CTX *ctx) | |
| 265 { | |
| 266 if (group->field_data1 == NULL) | |
| 267 { | |
| 268 ECerr(EC_F_EC_GFP_MONT_FIELD_MUL, EC_R_NOT_INITIALIZED); | |
| 269 return 0; | |
| 270 } | |
| 271 | |
| 272 return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx); | |
| 273 } | |
| 274 | |
| 275 | |
| 276 int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_
CTX *ctx) | |
| 277 { | |
| 278 if (group->field_data1 == NULL) | |
| 279 { | |
| 280 ECerr(EC_F_EC_GFP_MONT_FIELD_SQR, EC_R_NOT_INITIALIZED); | |
| 281 return 0; | |
| 282 } | |
| 283 | |
| 284 return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx); | |
| 285 } | |
| 286 | |
| 287 | |
| 288 int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
BN_CTX *ctx) | |
| 289 { | |
| 290 if (group->field_data1 == NULL) | |
| 291 { | |
| 292 ECerr(EC_F_EC_GFP_MONT_FIELD_ENCODE, EC_R_NOT_INITIALIZED); | |
| 293 return 0; | |
| 294 } | |
| 295 | |
| 296 return BN_to_montgomery(r, a, (BN_MONT_CTX *)group->field_data1, ctx); | |
| 297 } | |
| 298 | |
| 299 | |
| 300 int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
BN_CTX *ctx) | |
| 301 { | |
| 302 if (group->field_data1 == NULL) | |
| 303 { | |
| 304 ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED); | |
| 305 return 0; | |
| 306 } | |
| 307 | |
| 308 return BN_from_montgomery(r, a, group->field_data1, ctx); | |
| 309 } | |
| 310 | |
| 311 | |
| 312 int ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx) | |
| 313 { | |
| 314 if (group->field_data2 == NULL) | |
| 315 { | |
| 316 ECerr(EC_F_EC_GFP_MONT_FIELD_SET_TO_ONE, EC_R_NOT_INITIALIZED); | |
| 317 return 0; | |
| 318 } | |
| 319 | |
| 320 if (!BN_copy(r, group->field_data2)) return 0; | |
| 321 return 1; | |
| 322 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master