Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/ec/ec_lib.c */ |
| 2 | /* |
| 3 | * Originally written by Bodo Moeller 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 | * Binary polynomial ECC support in OpenSSL originally developed by |
| 61 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
| 62 | */ |
| 63 | |
| 64 | #include <string.h> |
| 65 | |
| 66 | #include <openssl/err.h> |
| 67 | #include <openssl/opensslv.h> |
| 68 | |
| 69 | #include "ec_lcl.h" |
| 70 | |
| 71 | static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; |
| 72 | |
| 73 | |
| 74 | /* functions for EC_GROUP objects */ |
| 75 | |
| 76 | EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) |
| 77 | { |
| 78 | EC_GROUP *ret; |
| 79 | |
| 80 | if (meth == NULL) |
| 81 | { |
| 82 | ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); |
| 83 | return NULL; |
| 84 | } |
| 85 | if (meth->group_init == 0) |
| 86 | { |
| 87 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 88 | return NULL; |
| 89 | } |
| 90 | |
| 91 | ret = OPENSSL_malloc(sizeof *ret); |
| 92 | if (ret == NULL) |
| 93 | { |
| 94 | ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); |
| 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | ret->meth = meth; |
| 99 | |
| 100 | ret->extra_data = NULL; |
| 101 | |
| 102 | ret->generator = NULL; |
| 103 | BN_init(&ret->order); |
| 104 | BN_init(&ret->cofactor); |
| 105 | |
| 106 | ret->curve_name = 0; |
| 107 | ret->asn1_flag = 0; |
| 108 | ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; |
| 109 | |
| 110 | ret->seed = NULL; |
| 111 | ret->seed_len = 0; |
| 112 | |
| 113 | if (!meth->group_init(ret)) |
| 114 | { |
| 115 | OPENSSL_free(ret); |
| 116 | return NULL; |
| 117 | } |
| 118 | |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | |
| 123 | void EC_GROUP_free(EC_GROUP *group) |
| 124 | { |
| 125 | if (!group) return; |
| 126 | |
| 127 | if (group->meth->group_finish != 0) |
| 128 | group->meth->group_finish(group); |
| 129 | |
| 130 | EC_EX_DATA_free_all_data(&group->extra_data); |
| 131 | |
| 132 | if (group->generator != NULL) |
| 133 | EC_POINT_free(group->generator); |
| 134 | BN_free(&group->order); |
| 135 | BN_free(&group->cofactor); |
| 136 | |
| 137 | if (group->seed) |
| 138 | OPENSSL_free(group->seed); |
| 139 | |
| 140 | OPENSSL_free(group); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | void EC_GROUP_clear_free(EC_GROUP *group) |
| 145 | { |
| 146 | if (!group) return; |
| 147 | |
| 148 | if (group->meth->group_clear_finish != 0) |
| 149 | group->meth->group_clear_finish(group); |
| 150 | else if (group->meth->group_finish != 0) |
| 151 | group->meth->group_finish(group); |
| 152 | |
| 153 | EC_EX_DATA_clear_free_all_data(&group->extra_data); |
| 154 | |
| 155 | if (group->generator != NULL) |
| 156 | EC_POINT_clear_free(group->generator); |
| 157 | BN_clear_free(&group->order); |
| 158 | BN_clear_free(&group->cofactor); |
| 159 | |
| 160 | if (group->seed) |
| 161 | { |
| 162 | OPENSSL_cleanse(group->seed, group->seed_len); |
| 163 | OPENSSL_free(group->seed); |
| 164 | } |
| 165 | |
| 166 | OPENSSL_cleanse(group, sizeof *group); |
| 167 | OPENSSL_free(group); |
| 168 | } |
| 169 | |
| 170 | |
| 171 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) |
| 172 | { |
| 173 | EC_EXTRA_DATA *d; |
| 174 | |
| 175 | if (dest->meth->group_copy == 0) |
| 176 | { |
| 177 | ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 178 | return 0; |
| 179 | } |
| 180 | if (dest->meth != src->meth) |
| 181 | { |
| 182 | ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); |
| 183 | return 0; |
| 184 | } |
| 185 | if (dest == src) |
| 186 | return 1; |
| 187 | |
| 188 | EC_EX_DATA_free_all_data(&dest->extra_data); |
| 189 | |
| 190 | for (d = src->extra_data; d != NULL; d = d->next) |
| 191 | { |
| 192 | void *t = d->dup_func(d->data); |
| 193 | |
| 194 | if (t == NULL) |
| 195 | return 0; |
| 196 | if (!EC_EX_DATA_set_data(&dest->extra_data, t, d->dup_func, d->free_func, d->clear_free_func)) |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | if (src->generator != NULL) |
| 201 | { |
| 202 | if (dest->generator == NULL) |
| 203 | { |
| 204 | dest->generator = EC_POINT_new(dest); |
| 205 | if (dest->generator == NULL) return 0; |
| 206 | } |
| 207 | if (!EC_POINT_copy(dest->generator, src->generator)) return 0; |
| 208 | } |
| 209 | else |
| 210 | { |
| 211 | /* src->generator == NULL */ |
| 212 | if (dest->generator != NULL) |
| 213 | { |
| 214 | EC_POINT_clear_free(dest->generator); |
| 215 | dest->generator = NULL; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | if (!BN_copy(&dest->order, &src->order)) return 0; |
| 220 | if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0; |
| 221 | |
| 222 | dest->curve_name = src->curve_name; |
| 223 | dest->asn1_flag = src->asn1_flag; |
| 224 | dest->asn1_form = src->asn1_form; |
| 225 | |
| 226 | if (src->seed) |
| 227 | { |
| 228 | if (dest->seed) |
| 229 | OPENSSL_free(dest->seed); |
| 230 | dest->seed = OPENSSL_malloc(src->seed_len); |
| 231 | if (dest->seed == NULL) |
| 232 | return 0; |
| 233 | if (!memcpy(dest->seed, src->seed, src->seed_len)) |
| 234 | return 0; |
| 235 | dest->seed_len = src->seed_len; |
| 236 | } |
| 237 | else |
| 238 | { |
| 239 | if (dest->seed) |
| 240 | OPENSSL_free(dest->seed); |
| 241 | dest->seed = NULL; |
| 242 | dest->seed_len = 0; |
| 243 | } |
| 244 | |
| 245 | |
| 246 | return dest->meth->group_copy(dest, src); |
| 247 | } |
| 248 | |
| 249 | |
| 250 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) |
| 251 | { |
| 252 | EC_GROUP *t = NULL; |
| 253 | int ok = 0; |
| 254 | |
| 255 | if (a == NULL) return NULL; |
| 256 | |
| 257 | if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL); |
| 258 | if (!EC_GROUP_copy(t, a)) goto err; |
| 259 | |
| 260 | ok = 1; |
| 261 | |
| 262 | err: |
| 263 | if (!ok) |
| 264 | { |
| 265 | if (t) EC_GROUP_free(t); |
| 266 | return NULL; |
| 267 | } |
| 268 | else return t; |
| 269 | } |
| 270 | |
| 271 | |
| 272 | const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group) |
| 273 | { |
| 274 | return group->meth; |
| 275 | } |
| 276 | |
| 277 | |
| 278 | int EC_METHOD_get_field_type(const EC_METHOD *meth) |
| 279 | { |
| 280 | return meth->field_type; |
| 281 | } |
| 282 | |
| 283 | |
| 284 | int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor) |
| 285 | { |
| 286 | if (generator == NULL) |
| 287 | { |
| 288 | ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER); |
| 289 | return 0 ; |
| 290 | } |
| 291 | |
| 292 | if (group->generator == NULL) |
| 293 | { |
| 294 | group->generator = EC_POINT_new(group); |
| 295 | if (group->generator == NULL) return 0; |
| 296 | } |
| 297 | if (!EC_POINT_copy(group->generator, generator)) return 0; |
| 298 | |
| 299 | if (order != NULL) |
| 300 | { if (!BN_copy(&group->order, order)) return 0; } |
| 301 | else |
| 302 | BN_zero(&group->order); |
| 303 | |
| 304 | if (cofactor != NULL) |
| 305 | { if (!BN_copy(&group->cofactor, cofactor)) return 0; } |
| 306 | else |
| 307 | BN_zero(&group->cofactor); |
| 308 | |
| 309 | return 1; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) |
| 314 | { |
| 315 | return group->generator; |
| 316 | } |
| 317 | |
| 318 | |
| 319 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) |
| 320 | { |
| 321 | if (!BN_copy(order, &group->order)) |
| 322 | return 0; |
| 323 | |
| 324 | return !BN_is_zero(order); |
| 325 | } |
| 326 | |
| 327 | |
| 328 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx) |
| 329 | { |
| 330 | if (!BN_copy(cofactor, &group->cofactor)) |
| 331 | return 0; |
| 332 | |
| 333 | return !BN_is_zero(&group->cofactor); |
| 334 | } |
| 335 | |
| 336 | |
| 337 | void EC_GROUP_set_curve_name(EC_GROUP *group, int nid) |
| 338 | { |
| 339 | group->curve_name = nid; |
| 340 | } |
| 341 | |
| 342 | |
| 343 | int EC_GROUP_get_curve_name(const EC_GROUP *group) |
| 344 | { |
| 345 | return group->curve_name; |
| 346 | } |
| 347 | |
| 348 | |
| 349 | void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) |
| 350 | { |
| 351 | group->asn1_flag = flag; |
| 352 | } |
| 353 | |
| 354 | |
| 355 | int EC_GROUP_get_asn1_flag(const EC_GROUP *group) |
| 356 | { |
| 357 | return group->asn1_flag; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | void EC_GROUP_set_point_conversion_form(EC_GROUP *group, |
| 362 | point_conversion_form_t form) |
| 363 | { |
| 364 | group->asn1_form = form; |
| 365 | } |
| 366 | |
| 367 | |
| 368 | point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group) |
| 369 | { |
| 370 | return group->asn1_form; |
| 371 | } |
| 372 | |
| 373 | |
| 374 | size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len) |
| 375 | { |
| 376 | if (group->seed) |
| 377 | { |
| 378 | OPENSSL_free(group->seed); |
| 379 | group->seed = NULL; |
| 380 | group->seed_len = 0; |
| 381 | } |
| 382 | |
| 383 | if (!len || !p) |
| 384 | return 1; |
| 385 | |
| 386 | if ((group->seed = OPENSSL_malloc(len)) == NULL) |
| 387 | return 0; |
| 388 | memcpy(group->seed, p, len); |
| 389 | group->seed_len = len; |
| 390 | |
| 391 | return len; |
| 392 | } |
| 393 | |
| 394 | |
| 395 | unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group) |
| 396 | { |
| 397 | return group->seed; |
| 398 | } |
| 399 | |
| 400 | |
| 401 | size_t EC_GROUP_get_seed_len(const EC_GROUP *group) |
| 402 | { |
| 403 | return group->seed_len; |
| 404 | } |
| 405 | |
| 406 | |
| 407 | int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
| 408 | { |
| 409 | if (group->meth->group_set_curve == 0) |
| 410 | { |
| 411 | ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 412 | return 0; |
| 413 | } |
| 414 | return group->meth->group_set_curve(group, p, a, b, ctx); |
| 415 | } |
| 416 | |
| 417 | |
| 418 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) |
| 419 | { |
| 420 | if (group->meth->group_get_curve == 0) |
| 421 | { |
| 422 | ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 423 | return 0; |
| 424 | } |
| 425 | return group->meth->group_get_curve(group, p, a, b, ctx); |
| 426 | } |
| 427 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 428 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 429 | int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
| 430 | { |
| 431 | if (group->meth->group_set_curve == 0) |
| 432 | { |
| 433 | ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 434 | return 0; |
| 435 | } |
| 436 | return group->meth->group_set_curve(group, p, a, b, ctx); |
| 437 | } |
| 438 | |
| 439 | |
| 440 | int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx) |
| 441 | { |
| 442 | if (group->meth->group_get_curve == 0) |
| 443 | { |
| 444 | ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 445 | return 0; |
| 446 | } |
| 447 | return group->meth->group_get_curve(group, p, a, b, ctx); |
| 448 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 449 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 450 | |
| 451 | int EC_GROUP_get_degree(const EC_GROUP *group) |
| 452 | { |
| 453 | if (group->meth->group_get_degree == 0) |
| 454 | { |
| 455 | ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 456 | return 0; |
| 457 | } |
| 458 | return group->meth->group_get_degree(group); |
| 459 | } |
| 460 | |
| 461 | |
| 462 | int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) |
| 463 | { |
| 464 | if (group->meth->group_check_discriminant == 0) |
| 465 | { |
| 466 | ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 467 | return 0; |
| 468 | } |
| 469 | return group->meth->group_check_discriminant(group, ctx); |
| 470 | } |
| 471 | |
| 472 | |
| 473 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) |
| 474 | { |
| 475 | int r = 0; |
| 476 | BIGNUM *a1, *a2, *a3, *b1, *b2, *b3; |
| 477 | BN_CTX *ctx_new = NULL; |
| 478 | |
| 479 | /* compare the field types*/ |
| 480 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) != |
| 481 | EC_METHOD_get_field_type(EC_GROUP_method_of(b))) |
| 482 | return 1; |
| 483 | /* compare the curve name (if present) */ |
| 484 | if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) && |
| 485 | EC_GROUP_get_curve_name(a) == EC_GROUP_get_curve_name(b)) |
| 486 | return 0; |
| 487 | |
| 488 | if (!ctx) |
| 489 | ctx_new = ctx = BN_CTX_new(); |
| 490 | if (!ctx) |
| 491 | return -1; |
| 492 | |
| 493 | BN_CTX_start(ctx); |
| 494 | a1 = BN_CTX_get(ctx); |
| 495 | a2 = BN_CTX_get(ctx); |
| 496 | a3 = BN_CTX_get(ctx); |
| 497 | b1 = BN_CTX_get(ctx); |
| 498 | b2 = BN_CTX_get(ctx); |
| 499 | b3 = BN_CTX_get(ctx); |
| 500 | if (!b3) |
| 501 | { |
| 502 | BN_CTX_end(ctx); |
| 503 | if (ctx_new) |
| 504 | BN_CTX_free(ctx); |
| 505 | return -1; |
| 506 | } |
| 507 | |
| 508 | /* XXX This approach assumes that the external representation |
| 509 | * of curves over the same field type is the same. |
| 510 | */ |
| 511 | if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) || |
| 512 | !b->meth->group_get_curve(b, b1, b2, b3, ctx)) |
| 513 | r = 1; |
| 514 | |
| 515 | if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3)) |
| 516 | r = 1; |
| 517 | |
| 518 | /* XXX EC_POINT_cmp() assumes that the methods are equal */ |
| 519 | if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a), |
| 520 | EC_GROUP_get0_generator(b), ctx)) |
| 521 | r = 1; |
| 522 | |
| 523 | if (!r) |
| 524 | { |
| 525 | /* compare the order and cofactor */ |
| 526 | if (!EC_GROUP_get_order(a, a1, ctx) || |
| 527 | !EC_GROUP_get_order(b, b1, ctx) || |
| 528 | !EC_GROUP_get_cofactor(a, a2, ctx) || |
| 529 | !EC_GROUP_get_cofactor(b, b2, ctx)) |
| 530 | { |
| 531 | BN_CTX_end(ctx); |
| 532 | if (ctx_new) |
| 533 | BN_CTX_free(ctx); |
| 534 | return -1; |
| 535 | } |
| 536 | if (BN_cmp(a1, b1) || BN_cmp(a2, b2)) |
| 537 | r = 1; |
| 538 | } |
| 539 | |
| 540 | BN_CTX_end(ctx); |
| 541 | if (ctx_new) |
| 542 | BN_CTX_free(ctx); |
| 543 | |
| 544 | return r; |
| 545 | } |
| 546 | |
| 547 | |
| 548 | /* this has 'package' visibility */ |
| 549 | int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data, |
| 550 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
| 551 | { |
| 552 | EC_EXTRA_DATA *d; |
| 553 | |
| 554 | if (ex_data == NULL) |
| 555 | return 0; |
| 556 | |
| 557 | for (d = *ex_data; d != NULL; d = d->next) |
| 558 | { |
| 559 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) |
| 560 | { |
| 561 | ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); |
| 562 | return 0; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | if (data == NULL) |
| 567 | /* no explicit entry needed */ |
| 568 | return 1; |
| 569 | |
| 570 | d = OPENSSL_malloc(sizeof *d); |
| 571 | if (d == NULL) |
| 572 | return 0; |
| 573 | |
| 574 | d->data = data; |
| 575 | d->dup_func = dup_func; |
| 576 | d->free_func = free_func; |
| 577 | d->clear_free_func = clear_free_func; |
| 578 | |
| 579 | d->next = *ex_data; |
| 580 | *ex_data = d; |
| 581 | |
| 582 | return 1; |
| 583 | } |
| 584 | |
| 585 | /* this has 'package' visibility */ |
| 586 | void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data, |
| 587 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
| 588 | { |
| 589 | const EC_EXTRA_DATA *d; |
| 590 | |
| 591 | for (d = ex_data; d != NULL; d = d->next) |
| 592 | { |
| 593 | if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func) |
| 594 | return d->data; |
| 595 | } |
| 596 | |
| 597 | return NULL; |
| 598 | } |
| 599 | |
| 600 | /* this has 'package' visibility */ |
| 601 | void EC_EX_DATA_free_data(EC_EXTRA_DATA **ex_data, |
| 602 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
| 603 | { |
| 604 | EC_EXTRA_DATA **p; |
| 605 | |
| 606 | if (ex_data == NULL) |
| 607 | return; |
| 608 | |
| 609 | for (p = ex_data; *p != NULL; p = &((*p)->next)) |
| 610 | { |
| 611 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) |
| 612 | { |
| 613 | EC_EXTRA_DATA *next = (*p)->next; |
| 614 | |
| 615 | (*p)->free_func((*p)->data); |
| 616 | OPENSSL_free(*p); |
| 617 | |
| 618 | *p = next; |
| 619 | return; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | /* this has 'package' visibility */ |
| 625 | void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data, |
| 626 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)) |
| 627 | { |
| 628 | EC_EXTRA_DATA **p; |
| 629 | |
| 630 | if (ex_data == NULL) |
| 631 | return; |
| 632 | |
| 633 | for (p = ex_data; *p != NULL; p = &((*p)->next)) |
| 634 | { |
| 635 | if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func) |
| 636 | { |
| 637 | EC_EXTRA_DATA *next = (*p)->next; |
| 638 | |
| 639 | (*p)->clear_free_func((*p)->data); |
| 640 | OPENSSL_free(*p); |
| 641 | |
| 642 | *p = next; |
| 643 | return; |
| 644 | } |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | /* this has 'package' visibility */ |
| 649 | void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data) |
| 650 | { |
| 651 | EC_EXTRA_DATA *d; |
| 652 | |
| 653 | if (ex_data == NULL) |
| 654 | return; |
| 655 | |
| 656 | d = *ex_data; |
| 657 | while (d) |
| 658 | { |
| 659 | EC_EXTRA_DATA *next = d->next; |
| 660 | |
| 661 | d->free_func(d->data); |
| 662 | OPENSSL_free(d); |
| 663 | |
| 664 | d = next; |
| 665 | } |
| 666 | *ex_data = NULL; |
| 667 | } |
| 668 | |
| 669 | /* this has 'package' visibility */ |
| 670 | void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data) |
| 671 | { |
| 672 | EC_EXTRA_DATA *d; |
| 673 | |
| 674 | if (ex_data == NULL) |
| 675 | return; |
| 676 | |
| 677 | d = *ex_data; |
| 678 | while (d) |
| 679 | { |
| 680 | EC_EXTRA_DATA *next = d->next; |
| 681 | |
| 682 | d->clear_free_func(d->data); |
| 683 | OPENSSL_free(d); |
| 684 | |
| 685 | d = next; |
| 686 | } |
| 687 | *ex_data = NULL; |
| 688 | } |
| 689 | |
| 690 | |
| 691 | /* functions for EC_POINT objects */ |
| 692 | |
| 693 | EC_POINT *EC_POINT_new(const EC_GROUP *group) |
| 694 | { |
| 695 | EC_POINT *ret; |
| 696 | |
| 697 | if (group == NULL) |
| 698 | { |
| 699 | ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); |
| 700 | return NULL; |
| 701 | } |
| 702 | if (group->meth->point_init == 0) |
| 703 | { |
| 704 | ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 705 | return NULL; |
| 706 | } |
| 707 | |
| 708 | ret = OPENSSL_malloc(sizeof *ret); |
| 709 | if (ret == NULL) |
| 710 | { |
| 711 | ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); |
| 712 | return NULL; |
| 713 | } |
| 714 | |
| 715 | ret->meth = group->meth; |
| 716 | |
| 717 | if (!ret->meth->point_init(ret)) |
| 718 | { |
| 719 | OPENSSL_free(ret); |
| 720 | return NULL; |
| 721 | } |
| 722 | |
| 723 | return ret; |
| 724 | } |
| 725 | |
| 726 | |
| 727 | void EC_POINT_free(EC_POINT *point) |
| 728 | { |
| 729 | if (!point) return; |
| 730 | |
| 731 | if (point->meth->point_finish != 0) |
| 732 | point->meth->point_finish(point); |
| 733 | OPENSSL_free(point); |
| 734 | } |
| 735 | |
| 736 | |
| 737 | void EC_POINT_clear_free(EC_POINT *point) |
| 738 | { |
| 739 | if (!point) return; |
| 740 | |
| 741 | if (point->meth->point_clear_finish != 0) |
| 742 | point->meth->point_clear_finish(point); |
| 743 | else if (point->meth->point_finish != 0) |
| 744 | point->meth->point_finish(point); |
| 745 | OPENSSL_cleanse(point, sizeof *point); |
| 746 | OPENSSL_free(point); |
| 747 | } |
| 748 | |
| 749 | |
| 750 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) |
| 751 | { |
| 752 | if (dest->meth->point_copy == 0) |
| 753 | { |
| 754 | ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 755 | return 0; |
| 756 | } |
| 757 | if (dest->meth != src->meth) |
| 758 | { |
| 759 | ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); |
| 760 | return 0; |
| 761 | } |
| 762 | if (dest == src) |
| 763 | return 1; |
| 764 | return dest->meth->point_copy(dest, src); |
| 765 | } |
| 766 | |
| 767 | |
| 768 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) |
| 769 | { |
| 770 | EC_POINT *t; |
| 771 | int r; |
| 772 | |
| 773 | if (a == NULL) return NULL; |
| 774 | |
| 775 | t = EC_POINT_new(group); |
| 776 | if (t == NULL) return(NULL); |
| 777 | r = EC_POINT_copy(t, a); |
| 778 | if (!r) |
| 779 | { |
| 780 | EC_POINT_free(t); |
| 781 | return NULL; |
| 782 | } |
| 783 | else return t; |
| 784 | } |
| 785 | |
| 786 | |
| 787 | const EC_METHOD *EC_POINT_method_of(const EC_POINT *point) |
| 788 | { |
| 789 | return point->meth; |
| 790 | } |
| 791 | |
| 792 | |
| 793 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) |
| 794 | { |
| 795 | if (group->meth->point_set_to_infinity == 0) |
| 796 | { |
| 797 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 798 | return 0; |
| 799 | } |
| 800 | if (group->meth != point->meth) |
| 801 | { |
| 802 | ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); |
| 803 | return 0; |
| 804 | } |
| 805 | return group->meth->point_set_to_infinity(group, point); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
| 810 | const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx) |
| 811 | { |
| 812 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) |
| 813 | { |
| 814 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 815 | return 0; |
| 816 | } |
| 817 | if (group->meth != point->meth) |
| 818 | { |
| 819 | ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
| 820 | return 0; |
| 821 | } |
| 822 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
| 823 | } |
| 824 | |
| 825 | |
| 826 | int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, |
| 827 | BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx) |
| 828 | { |
| 829 | if (group->meth->point_get_Jprojective_coordinates_GFp == 0) |
| 830 | { |
| 831 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 832 | return 0; |
| 833 | } |
| 834 | if (group->meth != point->meth) |
| 835 | { |
| 836 | ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
| 837 | return 0; |
| 838 | } |
| 839 | return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx); |
| 840 | } |
| 841 | |
| 842 | |
| 843 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
| 844 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) |
| 845 | { |
| 846 | if (group->meth->point_set_affine_coordinates == 0) |
| 847 | { |
| 848 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 849 | return 0; |
| 850 | } |
| 851 | if (group->meth != point->meth) |
| 852 | { |
| 853 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
| 854 | return 0; |
| 855 | } |
| 856 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
| 857 | } |
| 858 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 859 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 860 | int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, |
| 861 | const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx) |
| 862 | { |
| 863 | if (group->meth->point_set_affine_coordinates == 0) |
| 864 | { |
| 865 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 866 | return 0; |
| 867 | } |
| 868 | if (group->meth != point->meth) |
| 869 | { |
| 870 | ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
| 871 | return 0; |
| 872 | } |
| 873 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
| 874 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 875 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 876 | |
| 877 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point, |
| 878 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) |
| 879 | { |
| 880 | if (group->meth->point_get_affine_coordinates == 0) |
| 881 | { |
| 882 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 883 | return 0; |
| 884 | } |
| 885 | if (group->meth != point->meth) |
| 886 | { |
| 887 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
| 888 | return 0; |
| 889 | } |
| 890 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
| 891 | } |
| 892 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 893 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 894 | int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point, |
| 895 | BIGNUM *x, BIGNUM *y, BN_CTX *ctx) |
| 896 | { |
| 897 | if (group->meth->point_get_affine_coordinates == 0) |
| 898 | { |
| 899 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 900 | return 0; |
| 901 | } |
| 902 | if (group->meth != point->meth) |
| 903 | { |
| 904 | ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
| 905 | return 0; |
| 906 | } |
| 907 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
| 908 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 909 | |
| 910 | |
| 911 | int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
| 912 | const BIGNUM *x, int y_bit, BN_CTX *ctx) |
| 913 | { |
| 914 | if (group->meth->point_set_compressed_coordinates == 0) |
| 915 | { |
| 916 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 917 | return 0; |
| 918 | } |
| 919 | if (group->meth != point->meth) |
| 920 | { |
| 921 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS); |
| 922 | return 0; |
| 923 | } |
| 924 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); |
| 925 | } |
| 926 | |
| 927 | |
| 928 | int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point, |
| 929 | const BIGNUM *x, int y_bit, BN_CTX *ctx) |
| 930 | { |
| 931 | if (group->meth->point_set_compressed_coordinates == 0) |
| 932 | { |
| 933 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 934 | return 0; |
| 935 | } |
| 936 | if (group->meth != point->meth) |
| 937 | { |
| 938 | ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS); |
| 939 | return 0; |
| 940 | } |
| 941 | return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx); |
| 942 | } |
| 943 | |
| 944 | |
| 945 | size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, |
| 946 | unsigned char *buf, size_t len, BN_CTX *ctx) |
| 947 | { |
| 948 | if (group->meth->point2oct == 0) |
| 949 | { |
| 950 | ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 951 | return 0; |
| 952 | } |
| 953 | if (group->meth != point->meth) |
| 954 | { |
| 955 | ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS); |
| 956 | return 0; |
| 957 | } |
| 958 | return group->meth->point2oct(group, point, form, buf, len, ctx); |
| 959 | } |
| 960 | |
| 961 | |
| 962 | int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point, |
| 963 | const unsigned char *buf, size_t len, BN_CTX *ctx) |
| 964 | { |
| 965 | if (group->meth->oct2point == 0) |
| 966 | { |
| 967 | ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 968 | return 0; |
| 969 | } |
| 970 | if (group->meth != point->meth) |
| 971 | { |
| 972 | ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS); |
| 973 | return 0; |
| 974 | } |
| 975 | return group->meth->oct2point(group, point, buf, len, ctx); |
| 976 | } |
| 977 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 978 | |
| 979 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
| 980 | { |
| 981 | if (group->meth->add == 0) |
| 982 | { |
| 983 | ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 984 | return 0; |
| 985 | } |
| 986 | if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth)) |
| 987 | { |
| 988 | ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); |
| 989 | return 0; |
| 990 | } |
| 991 | return group->meth->add(group, r, a, b, ctx); |
| 992 | } |
| 993 | |
| 994 | |
| 995 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx) |
| 996 | { |
| 997 | if (group->meth->dbl == 0) |
| 998 | { |
| 999 | ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1000 | return 0; |
| 1001 | } |
| 1002 | if ((group->meth != r->meth) || (r->meth != a->meth)) |
| 1003 | { |
| 1004 | ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); |
| 1005 | return 0; |
| 1006 | } |
| 1007 | return group->meth->dbl(group, r, a, ctx); |
| 1008 | } |
| 1009 | |
| 1010 | |
| 1011 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) |
| 1012 | { |
| 1013 | if (group->meth->dbl == 0) |
| 1014 | { |
| 1015 | ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1016 | return 0; |
| 1017 | } |
| 1018 | if (group->meth != a->meth) |
| 1019 | { |
| 1020 | ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS); |
| 1021 | return 0; |
| 1022 | } |
| 1023 | return group->meth->invert(group, a, ctx); |
| 1024 | } |
| 1025 | |
| 1026 | |
| 1027 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) |
| 1028 | { |
| 1029 | if (group->meth->is_at_infinity == 0) |
| 1030 | { |
| 1031 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1032 | return 0; |
| 1033 | } |
| 1034 | if (group->meth != point->meth) |
| 1035 | { |
| 1036 | ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); |
| 1037 | return 0; |
| 1038 | } |
| 1039 | return group->meth->is_at_infinity(group, point); |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx) |
| 1044 | { |
| 1045 | if (group->meth->is_on_curve == 0) |
| 1046 | { |
| 1047 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1048 | return 0; |
| 1049 | } |
| 1050 | if (group->meth != point->meth) |
| 1051 | { |
| 1052 | ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); |
| 1053 | return 0; |
| 1054 | } |
| 1055 | return group->meth->is_on_curve(group, point, ctx); |
| 1056 | } |
| 1057 | |
| 1058 | |
| 1059 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx) |
| 1060 | { |
| 1061 | if (group->meth->point_cmp == 0) |
| 1062 | { |
| 1063 | ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1064 | return 0; |
| 1065 | } |
| 1066 | if ((group->meth != a->meth) || (a->meth != b->meth)) |
| 1067 | { |
| 1068 | ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); |
| 1069 | return 0; |
| 1070 | } |
| 1071 | return group->meth->point_cmp(group, a, b, ctx); |
| 1072 | } |
| 1073 | |
| 1074 | |
| 1075 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) |
| 1076 | { |
| 1077 | if (group->meth->make_affine == 0) |
| 1078 | { |
| 1079 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1080 | return 0; |
| 1081 | } |
| 1082 | if (group->meth != point->meth) |
| 1083 | { |
| 1084 | ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); |
| 1085 | return 0; |
| 1086 | } |
| 1087 | return group->meth->make_affine(group, point, ctx); |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx) |
| 1092 | { |
| 1093 | size_t i; |
| 1094 | |
| 1095 | if (group->meth->points_make_affine == 0) |
| 1096 | { |
| 1097 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 1098 | return 0; |
| 1099 | } |
| 1100 | for (i = 0; i < num; i++) |
| 1101 | { |
| 1102 | if (group->meth != points[i]->meth) |
| 1103 | { |
| 1104 | ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); |
| 1105 | return 0; |
| 1106 | } |
| 1107 | } |
| 1108 | return group->meth->points_make_affine(group, num, points, ctx); |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | /* Functions for point multiplication. |
| 1113 | * |
| 1114 | * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c; |
| 1115 | * otherwise we dispatch through methods. |
| 1116 | */ |
| 1117 | |
| 1118 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, |
| 1119 | size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx) |
| 1120 | { |
| 1121 | if (group->meth->mul == 0) |
| 1122 | /* use default */ |
| 1123 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); |
| 1124 | |
| 1125 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
| 1126 | } |
| 1127 | |
| 1128 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, |
| 1129 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) |
| 1130 | { |
| 1131 | /* just a convenient interface to EC_POINTs_mul() */ |
| 1132 | |
| 1133 | const EC_POINT *points[1]; |
| 1134 | const BIGNUM *scalars[1]; |
| 1135 | |
| 1136 | points[0] = point; |
| 1137 | scalars[0] = p_scalar; |
| 1138 | |
| 1139 | return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx); |
| 1140 | } |
| 1141 | |
| 1142 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) |
| 1143 | { |
| 1144 | if (group->meth->mul == 0) |
| 1145 | /* use default */ |
| 1146 | return ec_wNAF_precompute_mult(group, ctx); |
| 1147 | |
| 1148 | if (group->meth->precompute_mult != 0) |
| 1149 | return group->meth->precompute_mult(group, ctx); |
| 1150 | else |
| 1151 | return 1; /* nothing to do, so report success */ |
| 1152 | } |
| 1153 | |
| 1154 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) |
| 1155 | { |
| 1156 | if (group->meth->mul == 0) |
| 1157 | /* use default */ |
| 1158 | return ec_wNAF_have_precompute_mult(group); |
| 1159 | |
| 1160 | if (group->meth->have_precompute_mult != 0) |
| 1161 | return group->meth->have_precompute_mult(group); |
| 1162 | else |
| 1163 | return 0; /* cannot tell whether precomputation has been performed */ |
| 1164 | } |