| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: ec-info.c,v 1.4 2004/04/03 03:32:05 mdw Exp $ |
| 4 | * |
| 5 | * Elliptic curve information management |
| 6 | * |
| 7 | * (c) 2004 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of Catacomb. |
| 13 | * |
| 14 | * Catacomb is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU Library General Public License as |
| 16 | * published by the Free Software Foundation; either version 2 of the |
| 17 | * License, or (at your option) any later version. |
| 18 | * |
| 19 | * Catacomb is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU Library General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU Library General Public |
| 25 | * License along with Catacomb; if not, write to the Free |
| 26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 27 | * MA 02111-1307, USA. |
| 28 | */ |
| 29 | |
| 30 | /*----- Revision history --------------------------------------------------* |
| 31 | * |
| 32 | * $Log: ec-info.c,v $ |
| 33 | * Revision 1.4 2004/04/03 03:32:05 mdw |
| 34 | * General robustification. |
| 35 | * |
| 36 | * Revision 1.3 2004/04/01 21:28:41 mdw |
| 37 | * Normal basis support (translates to poly basis internally). Rewrite |
| 38 | * EC and prime group table generators in awk, so that they can reuse data |
| 39 | * for repeated constants. |
| 40 | * |
| 41 | * Revision 1.2 2004/04/01 12:50:09 mdw |
| 42 | * Add cyclic group abstraction, with test code. Separate off exponentation |
| 43 | * functions for better static linking. Fix a buttload of bugs on the way. |
| 44 | * Generally ensure that negative exponents do inversion correctly. Add |
| 45 | * table of standard prime-field subgroups. (Binary field subgroups are |
| 46 | * currently unimplemented but easy to add if anyone ever finds a good one.) |
| 47 | * |
| 48 | * Revision 1.1 2004/03/27 17:54:11 mdw |
| 49 | * Standard curves and curve checking. |
| 50 | * |
| 51 | */ |
| 52 | |
| 53 | /*----- Header files ------------------------------------------------------*/ |
| 54 | |
| 55 | #include "ec.h" |
| 56 | #include "ectab.h" |
| 57 | #include "gf.h" |
| 58 | #include "pgen.h" |
| 59 | #include "mprand.h" |
| 60 | #include "rabin.h" |
| 61 | |
| 62 | /*----- Main code ---------------------------------------------------------*/ |
| 63 | |
| 64 | /* --- @ec_curveparse@ --- * |
| 65 | * |
| 66 | * Arguments: @qd_parse *qd@ = parser context |
| 67 | * |
| 68 | * Returns: Elliptic curve pointer if OK, or null. |
| 69 | * |
| 70 | * Use: Parses an elliptic curve description, which has the form |
| 71 | * |
| 72 | * * a field description |
| 73 | * * an optional `/' |
| 74 | * * `prime', `primeproj', `bin', or `binproj' |
| 75 | * * an optional `:' |
| 76 | * * the %$a$% parameter |
| 77 | * * an optional `,' |
| 78 | * * the %$b$% parameter |
| 79 | */ |
| 80 | |
| 81 | ec_curve *ec_curveparse(qd_parse *qd) |
| 82 | { |
| 83 | mp *a = MP_NEW, *b = MP_NEW; |
| 84 | ec_curve *c; |
| 85 | field *f; |
| 86 | |
| 87 | if ((f = field_parse(qd)) == 0) goto fail; |
| 88 | qd_delim(qd, '/'); |
| 89 | switch (qd_enum(qd, "prime,primeproj,bin,binproj")) { |
| 90 | case 0: |
| 91 | if (F_TYPE(f) != FTY_PRIME) { |
| 92 | qd->e = "field not prime"; |
| 93 | goto fail; |
| 94 | } |
| 95 | qd_delim(qd, ':'); |
| 96 | if ((a = qd_getmp(qd)) == 0) goto fail; |
| 97 | qd_delim(qd, ','); |
| 98 | if ((b = qd_getmp(qd)) == 0) goto fail; |
| 99 | c = ec_prime(f, a, b); |
| 100 | break; |
| 101 | case 1: |
| 102 | if (F_TYPE(f) != FTY_PRIME) { |
| 103 | qd->e = "field not prime"; |
| 104 | goto fail; |
| 105 | } |
| 106 | qd_delim(qd, ':'); |
| 107 | if ((a = qd_getmp(qd)) == 0) goto fail; |
| 108 | qd_delim(qd, ','); |
| 109 | if ((b = qd_getmp(qd)) == 0) goto fail; |
| 110 | c = ec_primeproj(f, a, b); |
| 111 | break; |
| 112 | case 2: |
| 113 | if (F_TYPE(f) != FTY_BINARY) { |
| 114 | qd->e = "field not binary"; |
| 115 | goto fail; |
| 116 | } |
| 117 | qd_delim(qd, ':'); |
| 118 | if ((a = qd_getmp(qd)) == 0) goto fail; |
| 119 | qd_delim(qd, ','); |
| 120 | if ((b = qd_getmp(qd)) == 0) goto fail; |
| 121 | c = ec_bin(f, a, b); |
| 122 | break; |
| 123 | case 3: |
| 124 | if (F_TYPE(f) != FTY_BINARY) { |
| 125 | qd->e = "field not binary"; |
| 126 | goto fail; |
| 127 | } |
| 128 | qd_delim(qd, ':'); |
| 129 | if ((a = qd_getmp(qd)) == 0) goto fail; |
| 130 | qd_delim(qd, ','); |
| 131 | if ((b = qd_getmp(qd)) == 0) goto fail; |
| 132 | c = ec_binproj(f, a, b); |
| 133 | break; |
| 134 | default: |
| 135 | goto fail; |
| 136 | } |
| 137 | if (!c) { |
| 138 | qd->e = "bad curve parameters"; |
| 139 | goto fail; |
| 140 | } |
| 141 | if (a) MP_DROP(a); |
| 142 | if (b) MP_DROP(b); |
| 143 | return (c); |
| 144 | |
| 145 | fail: |
| 146 | if (f) F_DESTROY(f); |
| 147 | if (a) MP_DROP(a); |
| 148 | if (b) MP_DROP(b); |
| 149 | return (0); |
| 150 | } |
| 151 | |
| 152 | /* --- @ec_ptparse@ --- * |
| 153 | * |
| 154 | * Arguments: @qd_parse *qd@ = parser context |
| 155 | * @ec *p@ = where to put the point |
| 156 | * |
| 157 | * Returns: The point address, or null. |
| 158 | * |
| 159 | * Use: Parses an elliptic curve point. This has the form |
| 160 | * |
| 161 | * * %$x$%-coordinate |
| 162 | * * optional `,' |
| 163 | * * %$y$%-coordinate |
| 164 | */ |
| 165 | |
| 166 | ec *ec_ptparse(qd_parse *qd, ec *p) |
| 167 | { |
| 168 | mp *x = MP_NEW, *y = MP_NEW; |
| 169 | |
| 170 | if (qd_enum(qd, "inf") >= 0) { |
| 171 | EC_SETINF(p); |
| 172 | return (p); |
| 173 | } |
| 174 | if ((x = qd_getmp(qd)) == 0) goto fail; |
| 175 | qd_delim(qd, ','); |
| 176 | if ((y = qd_getmp(qd)) == 0) goto fail; |
| 177 | EC_DESTROY(p); |
| 178 | p->x = x; |
| 179 | p->y = y; |
| 180 | p->z = 0; |
| 181 | return (p); |
| 182 | |
| 183 | fail: |
| 184 | if (x) MP_DROP(x); |
| 185 | if (y) MP_DROP(y); |
| 186 | return (0); |
| 187 | } |
| 188 | |
| 189 | /* --- @getinfo@ --- * |
| 190 | * |
| 191 | * Arguments: @ec_info *ei@ = where to write the information |
| 192 | * @ecdata *ed@ = raw data |
| 193 | * |
| 194 | * Returns: --- |
| 195 | * |
| 196 | * Use: Loads elliptic curve information about one of the standard |
| 197 | * curves. |
| 198 | */ |
| 199 | |
| 200 | static void getinfo(ec_info *ei, ecdata *ed) |
| 201 | { |
| 202 | field *f; |
| 203 | |
| 204 | switch (ed->ftag) { |
| 205 | case FTAG_PRIME: |
| 206 | f = field_prime(&ed->p); |
| 207 | ei->c = ec_primeproj(f, &ed->a, &ed->b); |
| 208 | break; |
| 209 | case FTAG_NICEPRIME: |
| 210 | f = field_niceprime(&ed->p); |
| 211 | ei->c = ec_primeproj(f, &ed->a, &ed->b); |
| 212 | break; |
| 213 | case FTAG_BINPOLY: |
| 214 | f = field_binpoly(&ed->p); |
| 215 | ei->c = ec_binproj(f, &ed->a, &ed->b); |
| 216 | break; |
| 217 | case FTAG_BINNORM: |
| 218 | f = field_binnorm(&ed->p, &ed->beta); |
| 219 | ei->c = ec_binproj(f, &ed->a, &ed->b); |
| 220 | break; |
| 221 | default: |
| 222 | abort(); |
| 223 | } |
| 224 | |
| 225 | assert(f); assert(ei->c); |
| 226 | EC_CREATE(&ei->g); ei->g.x = &ed->gx; ei->g.y = &ed->gy; ei->g.z = 0; |
| 227 | ei->r = &ed->r; ei->h = &ed->h; |
| 228 | } |
| 229 | |
| 230 | /* --- @ec_infoparse@ --- * |
| 231 | * |
| 232 | * Arguments: @qd_parse *qd@ = parser context |
| 233 | * @ec_info *ei@ = curve information block, currently |
| 234 | * uninitialized |
| 235 | * |
| 236 | * Returns: Zero on success, nonzero on failure. |
| 237 | * |
| 238 | * Use: Parses an elliptic curve information string, and stores the |
| 239 | * information in @ei@. This is either the name of a standard |
| 240 | * curve, or it has the form |
| 241 | * |
| 242 | * * elliptic curve description |
| 243 | * * optional `/' |
| 244 | * * common point |
| 245 | * * optional `:' |
| 246 | * * group order |
| 247 | * * optional `*' |
| 248 | * * cofactor |
| 249 | */ |
| 250 | |
| 251 | int ec_infoparse(qd_parse *qd, ec_info *ei) |
| 252 | { |
| 253 | ec_curve *c = 0; |
| 254 | field *f; |
| 255 | ec g = EC_INIT; |
| 256 | const ecentry *ee; |
| 257 | mp *r = MP_NEW, *h = MP_NEW; |
| 258 | |
| 259 | for (ee = ectab; ee->name; ee++) |
| 260 | if (qd_enum(qd, ee->name) >= 0) { getinfo(ei, ee->data); goto found; } |
| 261 | |
| 262 | if ((c = ec_curveparse(qd)) == 0) goto fail; |
| 263 | qd_delim(qd, '/'); if (!ec_ptparse(qd, &g)) goto fail; |
| 264 | qd_delim(qd, ':'); if ((r = qd_getmp(qd)) == 0) goto fail; |
| 265 | qd_delim(qd, '*'); if ((h = qd_getmp(qd)) == 0) goto fail; |
| 266 | ei->c = c; ei->g = g; ei->r = r; ei->h = h; |
| 267 | |
| 268 | found: |
| 269 | return (0); |
| 270 | |
| 271 | fail: |
| 272 | EC_DESTROY(&g); |
| 273 | if (r) MP_DROP(r); |
| 274 | if (h) MP_DROP(h); |
| 275 | if (c) { f = c->f; ec_destroycurve(c); F_DESTROY(f); } |
| 276 | return (-1); |
| 277 | } |
| 278 | |
| 279 | /* --- @ec_getinfo@ --- * |
| 280 | * |
| 281 | * Arguments: @ec_info *ei@ = where to write the information |
| 282 | * @const char *p@ = string describing a curve |
| 283 | * |
| 284 | * Returns: Null on success, or a pointer to an error message. |
| 285 | * |
| 286 | * Use: Parses out information about a curve. The string is either a |
| 287 | * standard curve name, or a curve info string. |
| 288 | */ |
| 289 | |
| 290 | const char *ec_getinfo(ec_info *ei, const char *p) |
| 291 | { |
| 292 | qd_parse qd; |
| 293 | |
| 294 | qd.p = p; |
| 295 | qd.e = 0; |
| 296 | if (ec_infoparse(&qd, ei)) |
| 297 | return (qd.e); |
| 298 | if (!qd_eofp(&qd)) { |
| 299 | ec_freeinfo(ei); |
| 300 | return ("junk found at end of string"); |
| 301 | } |
| 302 | return (0); |
| 303 | } |
| 304 | |
| 305 | /* --- @ec_sameinfop@ --- * |
| 306 | * |
| 307 | * Arguments: @ec_info *ei, *ej@ = two elliptic curve parameter sets |
| 308 | * |
| 309 | * Returns: Nonzero if the curves are identical (not just isomorphic). |
| 310 | * |
| 311 | * Use: Checks for sameness of curve parameters. |
| 312 | */ |
| 313 | |
| 314 | int ec_sameinfop(ec_info *ei, ec_info *ej) |
| 315 | { |
| 316 | return (ec_samep(ei->c, ej->c) && |
| 317 | MP_EQ(ei->r, ej->r) && MP_EQ(ei->h, ej->h) && |
| 318 | EC_EQ(&ei->g, &ej->g)); |
| 319 | } |
| 320 | |
| 321 | /* --- @ec_freeinfo@ --- * |
| 322 | * |
| 323 | * Arguments: @ec_info *ei@ = elliptic curve information block to free |
| 324 | * |
| 325 | * Returns: --- |
| 326 | * |
| 327 | * Use: Frees the information block. |
| 328 | */ |
| 329 | |
| 330 | void ec_freeinfo(ec_info *ei) |
| 331 | { |
| 332 | field *f; |
| 333 | |
| 334 | EC_DESTROY(&ei->g); |
| 335 | MP_DROP(ei->r); |
| 336 | MP_DROP(ei->h); |
| 337 | f = ei->c->f; ec_destroycurve(ei->c); F_DESTROY(f); |
| 338 | } |
| 339 | |
| 340 | /* --- @ec_checkinfo@ --- * |
| 341 | * |
| 342 | * Arguments: @const ec_info *ei@ = elliptic curve information block |
| 343 | * |
| 344 | * Returns: Null if OK, or pointer to error message. |
| 345 | * |
| 346 | * Use: Checks an elliptic curve according to the rules in SEC1. |
| 347 | */ |
| 348 | |
| 349 | static int primeeltp(mp *x, field *f) |
| 350 | { |
| 351 | return (!MP_ISNEG(x) && MP_CMP(x, <, f->m)); |
| 352 | } |
| 353 | |
| 354 | static const char *primecheck(const ec_info *ei, grand *gr) |
| 355 | { |
| 356 | ec_curve *c = ei->c; |
| 357 | field *f = c->f; |
| 358 | int i; |
| 359 | mp *x, *y; |
| 360 | ec p; |
| 361 | int rc; |
| 362 | |
| 363 | /* --- Check %$p$% is an odd prime --- */ |
| 364 | |
| 365 | if (!pgen_primep(f->m, gr)) return ("p not prime"); |
| 366 | |
| 367 | /* --- Check %$a$%, %$b$%, %$G_x$% and %$G_y$% are in %$[0, p)$% --- */ |
| 368 | |
| 369 | if (!primeeltp(c->a, f)) return ("a out of range"); |
| 370 | if (!primeeltp(c->b, f)) return ("b out of range"); |
| 371 | if (!primeeltp(ei->g.x, f)) return ("G_x out of range"); |
| 372 | if (!primeeltp(ei->g.x, f)) return ("G_y out of range"); |
| 373 | |
| 374 | /* --- Check %$4 a^3 + 27 b^2 \not\equiv 0 \pmod{p}$% --- */ |
| 375 | |
| 376 | x = F_SQR(f, MP_NEW, c->a); |
| 377 | x = F_MUL(f, x, x, c->a); |
| 378 | x = F_QDL(f, x, x); |
| 379 | y = F_SQR(f, MP_NEW, c->b); |
| 380 | y = F_TPL(f, y, y); |
| 381 | y = F_TPL(f, y, y); |
| 382 | y = F_TPL(f, y, y); |
| 383 | x = F_ADD(f, x, x, y); |
| 384 | rc = F_ZEROP(f, x); |
| 385 | MP_DROP(x); |
| 386 | MP_DROP(y); |
| 387 | if (rc) return ("not an elliptic curve"); |
| 388 | |
| 389 | /* --- Check %$G \in E$% --- */ |
| 390 | |
| 391 | if (EC_ATINF(&ei->g)) return ("generator at infinity"); |
| 392 | if (ec_check(c, &ei->g)) return ("generator not on curve"); |
| 393 | |
| 394 | /* --- Check %$r$% is prime --- */ |
| 395 | |
| 396 | if (!pgen_primep(ei->r, gr)) return ("generator order not prime"); |
| 397 | |
| 398 | /* --- Check %$0 < h \le 4$% --- */ |
| 399 | |
| 400 | if (MP_CMP(ei->h, <, MP_ONE) || MP_CMP(ei->h, >, MP_FOUR)) |
| 401 | return ("cofactor out of range"); |
| 402 | |
| 403 | /* --- Check %$h = \lfloor (\sqrt{p} + 1)^2/r \rlfoor$% --- * |
| 404 | * |
| 405 | * This seems to work with the approximate-sqrt in the library, but might |
| 406 | * not be so good in some cases. Throw in some extra significate figures |
| 407 | * for good measure. |
| 408 | */ |
| 409 | |
| 410 | x = mp_lsl(MP_NEW, f->m, 128); |
| 411 | x = mp_sqrt(x, x); |
| 412 | y = mp_lsl(MP_NEW, MP_ONE, 64); |
| 413 | x = mp_add(x, x, y); |
| 414 | x = mp_sqr(x, x); |
| 415 | mp_div(&x, 0, x, ei->r); |
| 416 | x = mp_lsr(x, x, 128); |
| 417 | rc = MP_EQ(x, ei->h); |
| 418 | MP_DROP(x); |
| 419 | MP_DROP(y); |
| 420 | if (!rc) return ("incorrect cofactor"); |
| 421 | |
| 422 | /* --- Check %$n G = O$% --- */ |
| 423 | |
| 424 | EC_CREATE(&p); |
| 425 | ec_mul(c, &p, &ei->g, ei->r); |
| 426 | rc = EC_ATINF(&p); |
| 427 | EC_DESTROY(&p); |
| 428 | if (!rc) return ("incorrect group order"); |
| 429 | |
| 430 | /* --- Check that %$p^B \not\equiv 1 \pmod{r}$% for %$1 \le B < 20$% --- * |
| 431 | * |
| 432 | * The spec says %$q$%, not %$p$%, but I think that's a misprint. |
| 433 | */ |
| 434 | |
| 435 | x = MP_NEW; |
| 436 | mp_div(0, &x, f->m, ei->r); |
| 437 | i = 20; |
| 438 | while (i) { |
| 439 | if (MP_EQ(x, MP_ONE)) break; |
| 440 | x = mp_mul(x, x, f->m); |
| 441 | mp_div(0, &x, x, ei->r); |
| 442 | i--; |
| 443 | } |
| 444 | MP_DROP(x); |
| 445 | if (i) return ("curve is weak"); |
| 446 | |
| 447 | /* --- Done --- */ |
| 448 | |
| 449 | return (0); |
| 450 | } |
| 451 | |
| 452 | static const char *bincheck(const ec_info *ei, grand *gr) |
| 453 | { |
| 454 | ec_curve *c = ei->c; |
| 455 | field *f = c->f; |
| 456 | int i; |
| 457 | mp *x, *y; |
| 458 | ec p; |
| 459 | int rc; |
| 460 | |
| 461 | /* --- Check that %$p$% is irreducible --- */ |
| 462 | |
| 463 | if (!gf_irreduciblep(f->m)) return ("p not irreducible"); |
| 464 | |
| 465 | /* --- Check that %$a, b, G_x, G_y$% have degree less than %$p$% --- */ |
| 466 | |
| 467 | if (mp_bits(c->a) > f->nbits) return ("a out of range"); |
| 468 | if (mp_bits(c->b) > f->nbits) return ("a out of range"); |
| 469 | if (mp_bits(ei->g.x) > f->nbits) return ("G_x out of range"); |
| 470 | if (mp_bits(ei->g.y) > f->nbits) return ("G_y out of range"); |
| 471 | |
| 472 | /* --- Check that %$b \ne 0$% --- */ |
| 473 | |
| 474 | if (F_ZEROP(f, c->b)) return ("b is zero"); |
| 475 | |
| 476 | /* --- Check that %$G \in E$% --- */ |
| 477 | |
| 478 | if (EC_ATINF(&ei->g)) return ("generator at infinity"); |
| 479 | if (ec_check(c, &ei->g)) return ("generator not on curve"); |
| 480 | |
| 481 | /* --- Check %$r$% is prime --- */ |
| 482 | |
| 483 | if (!pgen_primep(ei->r, gr)) return ("generator order not prime"); |
| 484 | |
| 485 | /* --- Check %$0 < h \le 4$% --- */ |
| 486 | |
| 487 | if (MP_CMP(ei->h, <, MP_ONE) || MP_CMP(ei->h, >, MP_FOUR)) |
| 488 | return ("cofactor out of range"); |
| 489 | |
| 490 | /* --- Check %$h = \lfloor (\sqrt{2^m} + 1)^2/r \rlfoor$% --- * |
| 491 | * |
| 492 | * This seems to work with the approximate-sqrt in the library, but might |
| 493 | * not be so good in some cases. Throw in some extra significate figures |
| 494 | * for good measure. |
| 495 | */ |
| 496 | |
| 497 | x = mp_lsl(MP_NEW, MP_ONE, f->nbits + 128); |
| 498 | x = mp_sqrt(x, x); |
| 499 | y = mp_lsl(MP_NEW, MP_ONE, 64); |
| 500 | x = mp_add(x, x, y); |
| 501 | x = mp_sqr(x, x); |
| 502 | mp_div(&x, 0, x, ei->r); |
| 503 | x = mp_lsr(x, x, 128); |
| 504 | rc = MP_EQ(x, ei->h); |
| 505 | MP_DROP(x); |
| 506 | MP_DROP(y); |
| 507 | if (!rc) return ("incorrect cofactor"); |
| 508 | |
| 509 | /* --- Check %$n G = O$% --- */ |
| 510 | |
| 511 | EC_CREATE(&p); |
| 512 | ec_mul(c, &p, &ei->g, ei->r); |
| 513 | rc = EC_ATINF(&p); |
| 514 | EC_DESTROY(&p); |
| 515 | if (!rc) return ("incorrect group order"); |
| 516 | |
| 517 | /* --- Check %$2^{m B} \not\equiv 1 \pmod{r}$% for %$1 \le B < 20$% --- */ |
| 518 | |
| 519 | x = mp_lsl(MP_NEW, MP_ONE, f->nbits); |
| 520 | mp_div(0, &x, x, ei->r); |
| 521 | i = 20; |
| 522 | while (i) { |
| 523 | if (MP_EQ(x, MP_ONE)) break; |
| 524 | x = mp_mul(x, x, f->m); |
| 525 | mp_div(0, &x, x, ei->r); |
| 526 | i--; |
| 527 | } |
| 528 | MP_DROP(x); |
| 529 | if (i) return ("curve is weak"); |
| 530 | |
| 531 | /* --- Done --- */ |
| 532 | |
| 533 | return (0); |
| 534 | } |
| 535 | |
| 536 | const char *ec_checkinfo(const ec_info *ei, grand *gr) |
| 537 | { |
| 538 | switch (F_TYPE(ei->c->f)) { |
| 539 | case FTY_PRIME: return (primecheck(ei, gr)); break; |
| 540 | case FTY_BINARY: return (bincheck(ei, gr)); break; |
| 541 | } |
| 542 | return ("unknown curve type"); |
| 543 | } |
| 544 | |
| 545 | /*----- Test rig ----------------------------------------------------------*/ |
| 546 | |
| 547 | #ifdef TEST_RIG |
| 548 | |
| 549 | #include "fibrand.h" |
| 550 | |
| 551 | int main(void) |
| 552 | { |
| 553 | const ecentry *ee; |
| 554 | const char *e; |
| 555 | int ok = 1; |
| 556 | grand *gr; |
| 557 | |
| 558 | gr = fibrand_create(0); |
| 559 | fputs("checking standard curves: ", stdout); |
| 560 | for (ee = ectab; ee->name; ee++) { |
| 561 | ec_info ei; |
| 562 | getinfo(&ei, ee->data); |
| 563 | e = ec_checkinfo(&ei, gr); |
| 564 | ec_freeinfo(&ei); |
| 565 | if (e) { |
| 566 | fprintf(stderr, "\n*** curve %s fails: %s\n", ee->name, e); |
| 567 | ok = 0; |
| 568 | } |
| 569 | putchar('.'); |
| 570 | fflush(stdout); |
| 571 | } |
| 572 | gr->ops->destroy(gr); |
| 573 | fputs(ok ? " ok\n" : " failed\n", stdout); |
| 574 | return (!ok); |
| 575 | } |
| 576 | |
| 577 | #endif |
| 578 | |
| 579 | /*----- That's all, folks -------------------------------------------------*/ |