| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Code for testing elliptic-curve stuff |
| 4 | * |
| 5 | * (c) 2004 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Catacomb. |
| 11 | * |
| 12 | * Catacomb is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
| 16 | * |
| 17 | * Catacomb is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with Catacomb; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
| 28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | |
| 30 | #include <assert.h> |
| 31 | #include <ctype.h> |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include <mLib/alloc.h> |
| 37 | #include <mLib/testrig.h> |
| 38 | #include <mLib/sub.h> |
| 39 | |
| 40 | #include "ec.h" |
| 41 | #include "ectab.h" |
| 42 | #include "ec-raw.h" |
| 43 | #include "ec-test.h" |
| 44 | |
| 45 | /*----- Cardboard cut-out elliptic curve ----------------------------------*/ |
| 46 | |
| 47 | typedef struct ecctx { |
| 48 | ec_curve c; |
| 49 | unsigned long magic; |
| 50 | char *name; |
| 51 | ec_curve *real; |
| 52 | } ecctx; |
| 53 | |
| 54 | #define MAGIC 0x3a1f0b07 |
| 55 | |
| 56 | static void ecDESTROY(ec_curve *cc) |
| 57 | { |
| 58 | ecctx *c = (ecctx *)cc; |
| 59 | xfree(c->name); |
| 60 | ec_destroycurve(c->real); |
| 61 | DESTROY(c); |
| 62 | } |
| 63 | |
| 64 | #define UNOP(OP) \ |
| 65 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p) { \ |
| 66 | ecctx *c = (ecctx *)cc; \ |
| 67 | return (EC_##OP(c->real, d, p)); \ |
| 68 | } |
| 69 | |
| 70 | #define BINOP(OP) \ |
| 71 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p, const ec *q) { \ |
| 72 | ecctx *c = (ecctx *)cc; \ |
| 73 | return (EC_##OP(c->real, d, p, q)); \ |
| 74 | } |
| 75 | |
| 76 | UNOP(IN) |
| 77 | UNOP(OUT) |
| 78 | UNOP(FIX) |
| 79 | UNOP(NEG) |
| 80 | UNOP(DBL) |
| 81 | BINOP(ADD) |
| 82 | BINOP(SUB) |
| 83 | |
| 84 | #undef UNOP |
| 85 | #undef BINOP |
| 86 | |
| 87 | static ec *ecFIND(ec_curve *cc, ec *d, mp *x) |
| 88 | { |
| 89 | ecctx *c = (ecctx *)cc; |
| 90 | return (EC_FIND(c->real, d, x)); |
| 91 | } |
| 92 | |
| 93 | static int ecCOMPR(ec_curve *cc, const ec *p) |
| 94 | { |
| 95 | ecctx *c = (ecctx *)cc; |
| 96 | return (EC_COMPR(c->real, p)); |
| 97 | } |
| 98 | |
| 99 | static int ecCHECK(ec_curve *cc, const ec *p) |
| 100 | { |
| 101 | ecctx *c = (ecctx *)cc; |
| 102 | return (EC_CHECK(c->real, p)); |
| 103 | } |
| 104 | |
| 105 | static int ecSAMEP(ec_curve *cc, ec_curve *dd) |
| 106 | { |
| 107 | ecctx *c = (ecctx *)cc, *d = (ecctx *)dd; |
| 108 | return (ec_samep(c->real, d->real)); |
| 109 | } |
| 110 | |
| 111 | static const ec_ops ecops = { |
| 112 | "cardboard", |
| 113 | ecDESTROY, ecSAMEP, ecIN, ecOUT, ecFIX, |
| 114 | ecFIND, ecNEG, ecADD, ecSUB, ecDBL, ecCHECK, ecCOMPR |
| 115 | }; |
| 116 | |
| 117 | static ec_curve *ec_cutout(ec_curve *real, const char *name) |
| 118 | { |
| 119 | ecctx *c = CREATE(ecctx); |
| 120 | c->c.f = real->f; |
| 121 | c->c.ops = &ecops; |
| 122 | c->c.a = real->a; |
| 123 | c->c.b = real->b; |
| 124 | c->magic = MAGIC; |
| 125 | c->name = xstrdup(name); |
| 126 | c->real = real; |
| 127 | return (&c->c); |
| 128 | } |
| 129 | |
| 130 | static const char *ec_name(ec_curve *cc) |
| 131 | { |
| 132 | ecctx *c = (ecctx *)cc; |
| 133 | assert(c->magic == MAGIC); |
| 134 | return (c->name); |
| 135 | } |
| 136 | |
| 137 | /*----- Test field types --------------------------------------------------*/ |
| 138 | |
| 139 | static void ecvcvt(const char *buf, dstr *d) |
| 140 | { |
| 141 | ec_curve *v; |
| 142 | qd_parse qd; |
| 143 | const ecentry *ee; |
| 144 | ec_info ei; |
| 145 | |
| 146 | qd.p = buf; |
| 147 | qd.e = 0; |
| 148 | for (ee = ectab; ee->name; ee++) { |
| 149 | if (qd_enum(&qd, ee->name) >= 0) { |
| 150 | ec_infofromdata(&ei, ee->data); |
| 151 | v = ei.c; |
| 152 | MP_DROP(ei.r); MP_DROP(ei.h); |
| 153 | EC_DESTROY(&ei.g); |
| 154 | goto found; |
| 155 | } |
| 156 | } |
| 157 | if ((v = ec_curveparse(&qd)) == 0) { |
| 158 | fprintf(stderr, "bad curve `%.*s|%s': %s\n", |
| 159 | (int)(qd.p - buf), buf, qd.p, qd.e); |
| 160 | exit(1); |
| 161 | } |
| 162 | found: |
| 163 | dstr_ensure(d, sizeof(v)); |
| 164 | *(ec_curve **)d->buf = ec_cutout(v, buf); |
| 165 | d->len += sizeof(v); |
| 166 | } |
| 167 | |
| 168 | static void ecvdump(dstr *d, FILE *fp) |
| 169 | { |
| 170 | ec_curve *v = *(ec_curve **)d->buf; |
| 171 | fprintf(fp, "%s", ec_name(v)); |
| 172 | } |
| 173 | |
| 174 | const test_type type_ecurve = { ecvcvt, ecvdump }; |
| 175 | |
| 176 | static void eccvt(const char *p, dstr *d) |
| 177 | { |
| 178 | ec *a; |
| 179 | qd_parse qd; |
| 180 | |
| 181 | qd.p = p; |
| 182 | qd.e = 0; |
| 183 | dstr_ensure(d, sizeof(ec)); |
| 184 | a = (ec *)d->buf; |
| 185 | d->len += sizeof(ec); |
| 186 | ec_create(a); |
| 187 | if (!ec_ptparse(&qd, a)) { |
| 188 | fprintf(stderr, "bad point `%.*s|%s': %s\n", |
| 189 | (int)(qd.p - p), p, qd.p, qd.e); |
| 190 | exit(1); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | static void ecdodump(ec *a, FILE *fp) |
| 195 | { |
| 196 | if (EC_ATINF(a)) |
| 197 | fputs("inf", fp); |
| 198 | else { |
| 199 | fputs("0x", fp); |
| 200 | mp_writefile(a->x, fp, 16); |
| 201 | fputs(", 0x", fp); |
| 202 | mp_writefile(a->y, fp, 16); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | static void ecdump(dstr *d, FILE *fp) |
| 207 | { |
| 208 | ec *a = (ec *)d->buf; |
| 209 | ecdodump(a, fp); |
| 210 | } |
| 211 | |
| 212 | const test_type type_ec = { eccvt, ecdump }; |
| 213 | |
| 214 | /*----- Testing elliptic curve functionality ------------------------------*/ |
| 215 | |
| 216 | #ifdef TEST_RIG |
| 217 | |
| 218 | static void ecdestroy(ec_curve *c) |
| 219 | { |
| 220 | field *f = c->f; |
| 221 | ec_destroycurve(c); |
| 222 | F_DESTROY(f); |
| 223 | } |
| 224 | |
| 225 | #define UNOP(op) \ |
| 226 | static int v##op(dstr v[]) \ |
| 227 | { \ |
| 228 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
| 229 | ec *a = (ec *)v[1].buf; \ |
| 230 | ec *r = (ec *)v[2].buf; \ |
| 231 | ec c = EC_INIT; \ |
| 232 | int ok = 1; \ |
| 233 | ec_##op(e, &c, a); \ |
| 234 | if (!EC_EQ(r, &c)) { \ |
| 235 | fprintf(stderr, #op "failed"); \ |
| 236 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
| 237 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
| 238 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
| 239 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
| 240 | fprintf(stderr, "\n"); \ |
| 241 | ok = 0; \ |
| 242 | } \ |
| 243 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); \ |
| 244 | ecdestroy(e); \ |
| 245 | return (ok); \ |
| 246 | } |
| 247 | |
| 248 | #define BINOP(op) \ |
| 249 | static int v##op(dstr v[]) \ |
| 250 | { \ |
| 251 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
| 252 | ec *a = (ec *)v[1].buf; \ |
| 253 | ec *b = (ec *)v[2].buf; \ |
| 254 | ec *r = (ec *)v[3].buf; \ |
| 255 | ec c = EC_INIT; \ |
| 256 | int ok = 1; \ |
| 257 | ec_##op(e, &c, a, b); \ |
| 258 | if (!EC_EQ(r, &c)) { \ |
| 259 | fprintf(stderr, #op "failed"); \ |
| 260 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
| 261 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
| 262 | fprintf(stderr, "\n b = "); ecdodump(b, stderr); \ |
| 263 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
| 264 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
| 265 | fprintf(stderr, "\n"); \ |
| 266 | ok = 0; \ |
| 267 | } \ |
| 268 | EC_DESTROY(a); EC_DESTROY(b); EC_DESTROY(r); EC_DESTROY(&c); \ |
| 269 | ecdestroy(e); \ |
| 270 | return (ok); \ |
| 271 | } |
| 272 | |
| 273 | UNOP(neg) |
| 274 | UNOP(dbl) |
| 275 | BINOP(add) |
| 276 | BINOP(sub) |
| 277 | |
| 278 | static int vcheck(dstr v[]) |
| 279 | { |
| 280 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 281 | ec *a = (ec *)v[1].buf; |
| 282 | int r = *(int *)v[2].buf; |
| 283 | int c; |
| 284 | int ok = 1; |
| 285 | c = ec_check(e, a); |
| 286 | if (r != c) { |
| 287 | fprintf(stderr, "check failed"); |
| 288 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 289 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
| 290 | fprintf(stderr, "\n r = %d", r); |
| 291 | fprintf(stderr, "\n c = %d", c); |
| 292 | fprintf(stderr, "\n"); |
| 293 | ok = 0; |
| 294 | } |
| 295 | EC_DESTROY(a); |
| 296 | ecdestroy(e); |
| 297 | return (ok); |
| 298 | } |
| 299 | |
| 300 | static int vmul(dstr v[]) |
| 301 | { |
| 302 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 303 | ec *a = (ec *)v[1].buf; |
| 304 | mp *n = *(mp **)v[2].buf; |
| 305 | ec *r = (ec *)v[3].buf; |
| 306 | ec c = EC_INIT; |
| 307 | int ok = 1; |
| 308 | ec_mul(e, &c, a, n); |
| 309 | if (!EC_EQ(r, &c)) { |
| 310 | fprintf(stderr, "mul failed"); |
| 311 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 312 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
| 313 | fprintf(stderr, "\n n = "); mp_writefile(n, stderr, 10); |
| 314 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
| 315 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
| 316 | fprintf(stderr, "\n"); |
| 317 | ok = 0; |
| 318 | } |
| 319 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); MP_DROP(n); |
| 320 | ecdestroy(e); |
| 321 | return (ok); |
| 322 | } |
| 323 | |
| 324 | static int vfind(dstr v[]) |
| 325 | { |
| 326 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 327 | mp *x = *(mp **)v[1].buf; |
| 328 | ec *r = (ec *)v[2].buf; |
| 329 | ec c = EC_INIT; |
| 330 | int ok = 1; |
| 331 | if (!ec_find(e, &c, x)) EC_SETINF(&c); |
| 332 | if (!EC_EQ(r, &c)) { |
| 333 | fprintf(stderr, "find failed"); |
| 334 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 335 | fprintf(stderr, "\n x = "); mp_writefile(x, stderr, 16); |
| 336 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
| 337 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
| 338 | fprintf(stderr, "\n"); |
| 339 | ok = 0; |
| 340 | } |
| 341 | MP_DROP(x); EC_DESTROY(r); EC_DESTROY(&c); |
| 342 | ecdestroy(e); |
| 343 | return (ok); |
| 344 | } |
| 345 | |
| 346 | static int vec2osp(dstr v[]) |
| 347 | { |
| 348 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 349 | unsigned f = *(int *)v[1].buf; |
| 350 | ec *p = (ec *)v[2].buf; |
| 351 | size_t n = 1 + 2*e->f->noctets; |
| 352 | dstr d = DSTR_INIT, dd = DSTR_INIT; |
| 353 | buf b; |
| 354 | int ok = 1; |
| 355 | int win, wantwin; |
| 356 | |
| 357 | if (strcmp(v[3].buf, "FAIL") == 0) wantwin = 0; |
| 358 | else { wantwin = 1; type_hex.cvt(v[3].buf, &d); } |
| 359 | |
| 360 | dstr_ensure(&dd, n); buf_init(&b, dd.buf, n); |
| 361 | |
| 362 | win = !ec_ec2osp(e, f, &b, p); |
| 363 | if (!win != !wantwin || |
| 364 | (win && (BLEN(&b) != d.len || |
| 365 | memcmp(BBASE(&b), d.buf, BLEN(&b)) != 0))) { |
| 366 | ok = 0; |
| 367 | fprintf(stderr, "ec2osp failed"); |
| 368 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 369 | fprintf(stderr, "\n fmt = 0x%02x", f); |
| 370 | fprintf(stderr, "\n p = "); ecdodump(p, stderr); |
| 371 | fprintf(stderr, "\n want = "); |
| 372 | if (wantwin) type_hex.dump(&d, stderr); |
| 373 | else fprintf(stderr, "FAIL"); |
| 374 | fprintf(stderr, "\nfound = "); |
| 375 | if (win) { dd.len = BLEN(&b); type_hex.dump(&dd, stderr); } |
| 376 | else fprintf(stderr, "FAIL"); |
| 377 | fprintf(stderr, "\n"); |
| 378 | } |
| 379 | |
| 380 | dstr_destroy(&d); dstr_destroy(&dd); |
| 381 | EC_DESTROY(p); ecdestroy(e); |
| 382 | return (ok); |
| 383 | } |
| 384 | |
| 385 | static int vos2ecp(dstr v[]) |
| 386 | { |
| 387 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 388 | unsigned f = *(int *)v[1].buf; |
| 389 | int remain = *(int *)v[4].buf; |
| 390 | dstr d = DSTR_INIT; |
| 391 | ec *p, q = EC_INIT; |
| 392 | buf b; |
| 393 | int ok = 1; |
| 394 | int win; |
| 395 | |
| 396 | if (strcmp(v[3].buf, "FAIL") == 0) p = 0; |
| 397 | else { type_ec.cvt(v[3].buf, &d); p = (ec *)d.buf; } |
| 398 | |
| 399 | buf_init(&b, v[2].buf, v[2].len); |
| 400 | win = !ec_os2ecp(e, f, &b, &q); |
| 401 | |
| 402 | if (!win != !p || (win && (!EC_EQ(p, &q) || BLEFT(&b) != remain))) { |
| 403 | ok = 0; |
| 404 | fprintf(stderr, "os2ecp failed"); |
| 405 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 406 | fprintf(stderr, "\n fmt = 0x%02x", f); |
| 407 | fprintf(stderr, "\ninput = "); type_hex.dump(&v[2], stderr); |
| 408 | fprintf(stderr, "\n want = "); |
| 409 | if (p) ecdodump(p, stderr); else fprintf(stderr, "FAIL"); |
| 410 | fprintf(stderr, "\nfound = "); |
| 411 | if (win) ecdodump(&q, stderr); else fprintf(stderr, "FAIL"); |
| 412 | fprintf(stderr, "\nremain= %d", remain); |
| 413 | fprintf(stderr, "\nleft = %d", (int)BLEFT(&b)); |
| 414 | fprintf(stderr, "\n"); |
| 415 | } |
| 416 | |
| 417 | if (p) EC_DESTROY(p); EC_DESTROY(&q); ecdestroy(e); |
| 418 | dstr_destroy(&d); |
| 419 | return (ok); |
| 420 | } |
| 421 | |
| 422 | static test_chunk tests[] = { |
| 423 | { "neg", vneg, { &type_ecurve, &type_ec, &type_ec } }, |
| 424 | { "dbl", vdbl, { &type_ecurve, &type_ec, &type_ec } }, |
| 425 | { "add", vadd, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
| 426 | { "sub", vsub, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
| 427 | { "mul", vmul, { &type_ecurve, &type_ec, &type_mp, &type_ec } }, |
| 428 | { "check", vcheck, { &type_ecurve, &type_ec, &type_int } }, |
| 429 | { "find", vfind, { &type_ecurve, &type_mp, &type_ec } }, |
| 430 | { "ec2osp", vec2osp, { &type_ecurve, &type_int, &type_ec, &type_string } }, |
| 431 | { "os2ecp", vos2ecp, |
| 432 | { &type_ecurve, &type_int, &type_hex, &type_string, &type_int } }, |
| 433 | { 0, 0, { 0 } } |
| 434 | }; |
| 435 | |
| 436 | int main(int argc, char *argv[]) |
| 437 | { |
| 438 | sub_init(); |
| 439 | test_run(argc, argv, tests, SRCDIR "/t/ec"); |
| 440 | return (0); |
| 441 | } |
| 442 | |
| 443 | #endif |
| 444 | |
| 445 | /*----- That's all, folks -------------------------------------------------*/ |