| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: ec-test.c,v 1.3 2004/03/27 17:54:11 mdw Exp $ |
| 4 | * |
| 5 | * Code for testing elliptic-curve stuff |
| 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-test.c,v $ |
| 33 | * Revision 1.3 2004/03/27 17:54:11 mdw |
| 34 | * Standard curves and curve checking. |
| 35 | * |
| 36 | * Revision 1.2 2004/03/27 00:04:46 mdw |
| 37 | * Implement efficient reduction for pleasant-looking primes. |
| 38 | * |
| 39 | * Revision 1.1 2004/03/23 15:19:32 mdw |
| 40 | * Test elliptic curves more thoroughly. |
| 41 | * |
| 42 | */ |
| 43 | |
| 44 | /*----- Header files ------------------------------------------------------*/ |
| 45 | |
| 46 | #include <assert.h> |
| 47 | #include <ctype.h> |
| 48 | #include <stdio.h> |
| 49 | #include <stdlib.h> |
| 50 | #include <string.h> |
| 51 | |
| 52 | #include <mLib/alloc.h> |
| 53 | #include <mLib/testrig.h> |
| 54 | #include <mLib/sub.h> |
| 55 | |
| 56 | #include "ec.h" |
| 57 | #include "ec-test.h" |
| 58 | |
| 59 | /*----- Cardboard cut-out elliptic curve ----------------------------------*/ |
| 60 | |
| 61 | typedef struct ecctx { |
| 62 | ec_curve c; |
| 63 | unsigned long magic; |
| 64 | char *name; |
| 65 | ec_curve *real; |
| 66 | } ecctx; |
| 67 | |
| 68 | #define MAGIC 0x3a1f0b07 |
| 69 | |
| 70 | static void ecDESTROY(ec_curve *cc) |
| 71 | { |
| 72 | ecctx *c = (ecctx *)cc; |
| 73 | xfree(c->name); |
| 74 | ec_destroycurve(c->real); |
| 75 | DESTROY(c); |
| 76 | } |
| 77 | |
| 78 | #define UNOP(OP) \ |
| 79 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p) { \ |
| 80 | ecctx *c = (ecctx *)cc; \ |
| 81 | return (EC_##OP(c->real, d, p)); \ |
| 82 | } |
| 83 | |
| 84 | #define BINOP(OP) \ |
| 85 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p, const ec *q) { \ |
| 86 | ecctx *c = (ecctx *)cc; \ |
| 87 | return (EC_##OP(c->real, d, p, q)); \ |
| 88 | } |
| 89 | |
| 90 | UNOP(IN) |
| 91 | UNOP(OUT) |
| 92 | UNOP(FIX) |
| 93 | UNOP(NEG) |
| 94 | UNOP(DBL) |
| 95 | BINOP(ADD) |
| 96 | BINOP(SUB) |
| 97 | |
| 98 | #undef UNOP |
| 99 | #undef BINOP |
| 100 | |
| 101 | static ec *ecFIND(ec_curve *cc, ec *d, mp *x) |
| 102 | { |
| 103 | ecctx *c = (ecctx *)cc; |
| 104 | return (EC_FIND(c->real, d, x)); |
| 105 | } |
| 106 | |
| 107 | static int ecCHECK(ec_curve *cc, const ec *p) |
| 108 | { |
| 109 | ecctx *c = (ecctx *)cc; |
| 110 | return (EC_CHECK(c->real, p)); |
| 111 | } |
| 112 | |
| 113 | static ec_ops ecops = { |
| 114 | ecDESTROY, ecIN, ecOUT, ecFIX, |
| 115 | ecFIND, ecNEG, ecADD, ecSUB, ecDBL, ecCHECK |
| 116 | }; |
| 117 | |
| 118 | static ec_curve *ec_cutout(ec_curve *real, const char *name) |
| 119 | { |
| 120 | ecctx *c = CREATE(ecctx); |
| 121 | c->c.f = real->f; |
| 122 | c->c.ops = &ecops; |
| 123 | c->magic = MAGIC; |
| 124 | c->name = xstrdup(name); |
| 125 | c->real = real; |
| 126 | return (&c->c); |
| 127 | } |
| 128 | |
| 129 | static const char *ec_name(ec_curve *cc) |
| 130 | { |
| 131 | ecctx *c = (ecctx *)cc; |
| 132 | assert(c->magic == MAGIC); |
| 133 | return (c->name); |
| 134 | } |
| 135 | |
| 136 | /*----- Test field types --------------------------------------------------*/ |
| 137 | |
| 138 | static void ecvcvt(const char *buf, dstr *d) |
| 139 | { |
| 140 | ec_curve *v; |
| 141 | qd_parse qd; |
| 142 | |
| 143 | qd.p = buf; |
| 144 | qd.e = 0; |
| 145 | if ((v = ec_curveparse(&qd)) == 0) { |
| 146 | fprintf(stderr, "bad curve `%.*s|%s': %s\n", |
| 147 | qd.p - buf, buf, qd.p, qd.e); |
| 148 | exit(1); |
| 149 | } |
| 150 | dstr_ensure(d, sizeof(v)); |
| 151 | *(ec_curve **)d->buf = ec_cutout(v, buf); |
| 152 | d->len += sizeof(v); |
| 153 | } |
| 154 | |
| 155 | static void ecvdump(dstr *d, FILE *fp) |
| 156 | { |
| 157 | ec_curve *v = *(ec_curve **)d->buf; |
| 158 | fprintf(fp, "%s", ec_name(v)); |
| 159 | } |
| 160 | |
| 161 | test_type type_ecurve = { ecvcvt, ecvdump }; |
| 162 | |
| 163 | static void eccvt(const char *p, dstr *d) |
| 164 | { |
| 165 | ec *a; |
| 166 | qd_parse qd; |
| 167 | |
| 168 | qd.p = p; |
| 169 | qd.e = 0; |
| 170 | dstr_ensure(d, sizeof(ec)); |
| 171 | a = (ec *)d->buf; |
| 172 | d->len += sizeof(ec); |
| 173 | ec_create(a); |
| 174 | if (!ec_ptparse(&qd, a)) { |
| 175 | fprintf(stderr, "bad point `%.*s|%s': %s\n", qd.p - p, p, qd.p, qd.e); |
| 176 | exit(1); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | static void ecdodump(ec *a, FILE *fp) |
| 181 | { |
| 182 | if (EC_ATINF(a)) |
| 183 | fputs("inf", fp); |
| 184 | else { |
| 185 | fputs("0x", fp); |
| 186 | mp_writefile(a->x, fp, 16); |
| 187 | fputs(", 0x", fp); |
| 188 | mp_writefile(a->y, fp, 16); |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | static void ecdump(dstr *d, FILE *fp) |
| 193 | { |
| 194 | ec *a = (ec *)d->buf; |
| 195 | ecdodump(a, fp); |
| 196 | } |
| 197 | |
| 198 | test_type type_ec = { eccvt, ecdump }; |
| 199 | |
| 200 | /*----- Testing elliptic curve functionality ------------------------------*/ |
| 201 | |
| 202 | #ifdef TEST_RIG |
| 203 | |
| 204 | static void ecdestroy(ec_curve *c) |
| 205 | { |
| 206 | field *f = c->f; |
| 207 | ec_destroycurve(c); |
| 208 | F_DESTROY(f); |
| 209 | } |
| 210 | |
| 211 | #define UNOP(op) \ |
| 212 | static int v##op(dstr v[]) \ |
| 213 | { \ |
| 214 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
| 215 | ec *a = (ec *)v[1].buf; \ |
| 216 | ec *r = (ec *)v[2].buf; \ |
| 217 | ec c = EC_INIT; \ |
| 218 | int ok = 1; \ |
| 219 | ec_##op(e, &c, a); \ |
| 220 | if (!EC_EQ(r, &c)) { \ |
| 221 | fprintf(stderr, #op "failed"); \ |
| 222 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
| 223 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
| 224 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
| 225 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
| 226 | fprintf(stderr, "\n"); \ |
| 227 | ok = 0; \ |
| 228 | } \ |
| 229 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); \ |
| 230 | ecdestroy(e); \ |
| 231 | return (ok); \ |
| 232 | } |
| 233 | |
| 234 | #define BINOP(op) \ |
| 235 | static int v##op(dstr v[]) \ |
| 236 | { \ |
| 237 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
| 238 | ec *a = (ec *)v[1].buf; \ |
| 239 | ec *b = (ec *)v[2].buf; \ |
| 240 | ec *r = (ec *)v[3].buf; \ |
| 241 | ec c = EC_INIT; \ |
| 242 | int ok = 1; \ |
| 243 | ec_##op(e, &c, a, b); \ |
| 244 | if (!EC_EQ(r, &c)) { \ |
| 245 | fprintf(stderr, #op "failed"); \ |
| 246 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
| 247 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
| 248 | fprintf(stderr, "\n b = "); ecdodump(b, stderr); \ |
| 249 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
| 250 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
| 251 | fprintf(stderr, "\n"); \ |
| 252 | ok = 0; \ |
| 253 | } \ |
| 254 | EC_DESTROY(a); EC_DESTROY(b); EC_DESTROY(r); EC_DESTROY(&c); \ |
| 255 | ecdestroy(e); \ |
| 256 | return (ok); \ |
| 257 | } |
| 258 | |
| 259 | UNOP(neg) |
| 260 | UNOP(dbl) |
| 261 | BINOP(add) |
| 262 | BINOP(sub) |
| 263 | |
| 264 | static int vcheck(dstr v[]) |
| 265 | { |
| 266 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 267 | ec *a = (ec *)v[1].buf; |
| 268 | int r = *(int *)v[2].buf; |
| 269 | int c; |
| 270 | int ok = 1; |
| 271 | c = ec_check(e, a); |
| 272 | if (r != c) { |
| 273 | fprintf(stderr, "check failed"); |
| 274 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 275 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
| 276 | fprintf(stderr, "\n r = %d", r); |
| 277 | fprintf(stderr, "\n c = %d", c); |
| 278 | fprintf(stderr, "\n"); |
| 279 | ok = 0; |
| 280 | } |
| 281 | EC_DESTROY(a); |
| 282 | ecdestroy(e); |
| 283 | return (ok); |
| 284 | } |
| 285 | |
| 286 | static int vmul(dstr v[]) |
| 287 | { |
| 288 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 289 | ec *a = (ec *)v[1].buf; |
| 290 | mp *n = *(mp **)v[2].buf; |
| 291 | ec *r = (ec *)v[3].buf; |
| 292 | ec c = EC_INIT; |
| 293 | int ok = 1; |
| 294 | ec_mul(e, &c, a, n); |
| 295 | if (!EC_EQ(r, &c)) { |
| 296 | fprintf(stderr, "mul failed"); |
| 297 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 298 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
| 299 | fprintf(stderr, "\n n = "); mp_writefile(n, stderr, 10); |
| 300 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
| 301 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
| 302 | fprintf(stderr, "\n"); |
| 303 | ok = 0; |
| 304 | } |
| 305 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); MP_DROP(n); |
| 306 | ecdestroy(e); |
| 307 | return (ok); |
| 308 | } |
| 309 | |
| 310 | static int vfind(dstr v[]) |
| 311 | { |
| 312 | ec_curve *e = *(ec_curve **)v[0].buf; |
| 313 | mp *x = *(mp **)v[1].buf; |
| 314 | ec *r = (ec *)v[2].buf; |
| 315 | ec c = EC_INIT; |
| 316 | int ok = 1; |
| 317 | if (!ec_find(e, &c, x)) EC_SETINF(&c); |
| 318 | if (!EC_EQ(r, &c)) { |
| 319 | fprintf(stderr, "find failed"); |
| 320 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
| 321 | fprintf(stderr, "\n x = "); mp_writefile(x, stderr, 16); |
| 322 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
| 323 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
| 324 | fprintf(stderr, "\n"); |
| 325 | ok = 0; |
| 326 | } |
| 327 | MP_DROP(x); EC_DESTROY(r); EC_DESTROY(&c); |
| 328 | ecdestroy(e); |
| 329 | return (ok); |
| 330 | } |
| 331 | |
| 332 | static test_chunk tests[] = { |
| 333 | { "neg", vneg, { &type_ecurve, &type_ec, &type_ec } }, |
| 334 | { "dbl", vdbl, { &type_ecurve, &type_ec, &type_ec } }, |
| 335 | { "add", vadd, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
| 336 | { "sub", vsub, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
| 337 | { "mul", vmul, { &type_ecurve, &type_ec, &type_mp, &type_ec } }, |
| 338 | { "check", vcheck, { &type_ecurve, &type_ec, &type_int } }, |
| 339 | { "find", vfind, { &type_ecurve, &type_mp, &type_ec } }, |
| 340 | { 0, 0, { 0 } } |
| 341 | }; |
| 342 | |
| 343 | int main(int argc, char *argv[]) |
| 344 | { |
| 345 | sub_init(); |
| 346 | test_run(argc, argv, tests, SRCDIR "/tests/ec"); |
| 347 | return (0); |
| 348 | } |
| 349 | |
| 350 | #endif |
| 351 | |
| 352 | /*----- That's all, folks -------------------------------------------------*/ |