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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: ec-test.c,v 1.5 2004/04/02 01:03:49 mdw Exp $ |
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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 $ |
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33 | * Revision 1.5 2004/04/02 01:03:49 mdw |
34 | * Miscellaneous constification. |
35 | * |
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36 | * Revision 1.4 2004/04/01 12:50:09 mdw |
37 | * Add cyclic group abstraction, with test code. Separate off exponentation |
38 | * functions for better static linking. Fix a buttload of bugs on the way. |
39 | * Generally ensure that negative exponents do inversion correctly. Add |
40 | * table of standard prime-field subgroups. (Binary field subgroups are |
41 | * currently unimplemented but easy to add if anyone ever finds a good one.) |
42 | * |
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43 | * Revision 1.3 2004/03/27 17:54:11 mdw |
44 | * Standard curves and curve checking. |
45 | * |
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46 | * Revision 1.2 2004/03/27 00:04:46 mdw |
47 | * Implement efficient reduction for pleasant-looking primes. |
48 | * |
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49 | * Revision 1.1 2004/03/23 15:19:32 mdw |
50 | * Test elliptic curves more thoroughly. |
51 | * |
52 | */ |
53 | |
54 | /*----- Header files ------------------------------------------------------*/ |
55 | |
56 | #include <assert.h> |
57 | #include <ctype.h> |
58 | #include <stdio.h> |
59 | #include <stdlib.h> |
60 | #include <string.h> |
61 | |
62 | #include <mLib/alloc.h> |
63 | #include <mLib/testrig.h> |
64 | #include <mLib/sub.h> |
65 | |
66 | #include "ec.h" |
67 | #include "ec-test.h" |
68 | |
69 | /*----- Cardboard cut-out elliptic curve ----------------------------------*/ |
70 | |
71 | typedef struct ecctx { |
72 | ec_curve c; |
73 | unsigned long magic; |
74 | char *name; |
75 | ec_curve *real; |
76 | } ecctx; |
77 | |
78 | #define MAGIC 0x3a1f0b07 |
79 | |
80 | static void ecDESTROY(ec_curve *cc) |
81 | { |
82 | ecctx *c = (ecctx *)cc; |
83 | xfree(c->name); |
84 | ec_destroycurve(c->real); |
85 | DESTROY(c); |
86 | } |
87 | |
88 | #define UNOP(OP) \ |
89 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p) { \ |
90 | ecctx *c = (ecctx *)cc; \ |
91 | return (EC_##OP(c->real, d, p)); \ |
92 | } |
93 | |
94 | #define BINOP(OP) \ |
95 | static ec *ec##OP(ec_curve *cc, ec *d, const ec *p, const ec *q) { \ |
96 | ecctx *c = (ecctx *)cc; \ |
97 | return (EC_##OP(c->real, d, p, q)); \ |
98 | } |
99 | |
100 | UNOP(IN) |
101 | UNOP(OUT) |
102 | UNOP(FIX) |
103 | UNOP(NEG) |
104 | UNOP(DBL) |
105 | BINOP(ADD) |
106 | BINOP(SUB) |
107 | |
108 | #undef UNOP |
109 | #undef BINOP |
110 | |
111 | static ec *ecFIND(ec_curve *cc, ec *d, mp *x) |
112 | { |
113 | ecctx *c = (ecctx *)cc; |
114 | return (EC_FIND(c->real, d, x)); |
115 | } |
116 | |
117 | static int ecCHECK(ec_curve *cc, const ec *p) |
118 | { |
119 | ecctx *c = (ecctx *)cc; |
120 | return (EC_CHECK(c->real, p)); |
121 | } |
122 | |
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123 | static int ecSAMEP(ec_curve *cc, ec_curve *dd) |
124 | { |
125 | ecctx *c = (ecctx *)cc, *d = (ecctx *)dd; |
126 | return (ec_samep(c->real, d->real)); |
127 | } |
128 | |
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129 | static const ec_ops ecops = { |
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130 | ecDESTROY, ecSAMEP, ecIN, ecOUT, ecFIX, |
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131 | ecFIND, ecNEG, ecADD, ecSUB, ecDBL, ecCHECK |
132 | }; |
133 | |
134 | static ec_curve *ec_cutout(ec_curve *real, const char *name) |
135 | { |
136 | ecctx *c = CREATE(ecctx); |
137 | c->c.f = real->f; |
138 | c->c.ops = &ecops; |
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139 | c->c.a = real->a; |
140 | c->c.b = real->b; |
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141 | c->magic = MAGIC; |
142 | c->name = xstrdup(name); |
143 | c->real = real; |
144 | return (&c->c); |
145 | } |
146 | |
147 | static const char *ec_name(ec_curve *cc) |
148 | { |
149 | ecctx *c = (ecctx *)cc; |
150 | assert(c->magic == MAGIC); |
151 | return (c->name); |
152 | } |
153 | |
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154 | /*----- Test field types --------------------------------------------------*/ |
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155 | |
156 | static void ecvcvt(const char *buf, dstr *d) |
157 | { |
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158 | ec_curve *v; |
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159 | qd_parse qd; |
160 | |
161 | qd.p = buf; |
162 | qd.e = 0; |
163 | if ((v = ec_curveparse(&qd)) == 0) { |
164 | fprintf(stderr, "bad curve `%.*s|%s': %s\n", |
165 | qd.p - buf, buf, qd.p, qd.e); |
166 | exit(1); |
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167 | } |
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168 | dstr_ensure(d, sizeof(v)); |
169 | *(ec_curve **)d->buf = ec_cutout(v, buf); |
170 | d->len += sizeof(v); |
171 | } |
172 | |
173 | static void ecvdump(dstr *d, FILE *fp) |
174 | { |
175 | ec_curve *v = *(ec_curve **)d->buf; |
176 | fprintf(fp, "%s", ec_name(v)); |
177 | } |
178 | |
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179 | const test_type type_ecurve = { ecvcvt, ecvdump }; |
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180 | |
181 | static void eccvt(const char *p, dstr *d) |
182 | { |
183 | ec *a; |
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184 | qd_parse qd; |
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185 | |
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186 | qd.p = p; |
187 | qd.e = 0; |
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188 | dstr_ensure(d, sizeof(ec)); |
189 | a = (ec *)d->buf; |
190 | d->len += sizeof(ec); |
191 | ec_create(a); |
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192 | if (!ec_ptparse(&qd, a)) { |
193 | fprintf(stderr, "bad point `%.*s|%s': %s\n", qd.p - p, p, qd.p, qd.e); |
194 | exit(1); |
195 | } |
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196 | } |
197 | |
198 | static void ecdodump(ec *a, FILE *fp) |
199 | { |
200 | if (EC_ATINF(a)) |
201 | fputs("inf", fp); |
202 | else { |
203 | fputs("0x", fp); |
204 | mp_writefile(a->x, fp, 16); |
205 | fputs(", 0x", fp); |
206 | mp_writefile(a->y, fp, 16); |
207 | } |
208 | } |
209 | |
210 | static void ecdump(dstr *d, FILE *fp) |
211 | { |
212 | ec *a = (ec *)d->buf; |
213 | ecdodump(a, fp); |
214 | } |
215 | |
216 | test_type type_ec = { eccvt, ecdump }; |
217 | |
218 | /*----- Testing elliptic curve functionality ------------------------------*/ |
219 | |
220 | #ifdef TEST_RIG |
221 | |
222 | static void ecdestroy(ec_curve *c) |
223 | { |
224 | field *f = c->f; |
225 | ec_destroycurve(c); |
226 | F_DESTROY(f); |
227 | } |
228 | |
229 | #define UNOP(op) \ |
230 | static int v##op(dstr v[]) \ |
231 | { \ |
232 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
233 | ec *a = (ec *)v[1].buf; \ |
234 | ec *r = (ec *)v[2].buf; \ |
235 | ec c = EC_INIT; \ |
236 | int ok = 1; \ |
237 | ec_##op(e, &c, a); \ |
238 | if (!EC_EQ(r, &c)) { \ |
239 | fprintf(stderr, #op "failed"); \ |
240 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
241 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
242 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
243 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
244 | fprintf(stderr, "\n"); \ |
245 | ok = 0; \ |
246 | } \ |
247 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); \ |
248 | ecdestroy(e); \ |
249 | return (ok); \ |
250 | } |
251 | |
252 | #define BINOP(op) \ |
253 | static int v##op(dstr v[]) \ |
254 | { \ |
255 | ec_curve *e = *(ec_curve **)v[0].buf; \ |
256 | ec *a = (ec *)v[1].buf; \ |
257 | ec *b = (ec *)v[2].buf; \ |
258 | ec *r = (ec *)v[3].buf; \ |
259 | ec c = EC_INIT; \ |
260 | int ok = 1; \ |
261 | ec_##op(e, &c, a, b); \ |
262 | if (!EC_EQ(r, &c)) { \ |
263 | fprintf(stderr, #op "failed"); \ |
264 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); \ |
265 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); \ |
266 | fprintf(stderr, "\n b = "); ecdodump(b, stderr); \ |
267 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); \ |
268 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); \ |
269 | fprintf(stderr, "\n"); \ |
270 | ok = 0; \ |
271 | } \ |
272 | EC_DESTROY(a); EC_DESTROY(b); EC_DESTROY(r); EC_DESTROY(&c); \ |
273 | ecdestroy(e); \ |
274 | return (ok); \ |
275 | } |
276 | |
277 | UNOP(neg) |
278 | UNOP(dbl) |
279 | BINOP(add) |
280 | BINOP(sub) |
281 | |
282 | static int vcheck(dstr v[]) |
283 | { |
284 | ec_curve *e = *(ec_curve **)v[0].buf; |
285 | ec *a = (ec *)v[1].buf; |
286 | int r = *(int *)v[2].buf; |
287 | int c; |
288 | int ok = 1; |
289 | c = ec_check(e, a); |
290 | if (r != c) { |
291 | fprintf(stderr, "check failed"); |
292 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
293 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
294 | fprintf(stderr, "\n r = %d", r); |
295 | fprintf(stderr, "\n c = %d", c); |
296 | fprintf(stderr, "\n"); |
297 | ok = 0; |
298 | } |
299 | EC_DESTROY(a); |
300 | ecdestroy(e); |
301 | return (ok); |
302 | } |
303 | |
304 | static int vmul(dstr v[]) |
305 | { |
306 | ec_curve *e = *(ec_curve **)v[0].buf; |
307 | ec *a = (ec *)v[1].buf; |
308 | mp *n = *(mp **)v[2].buf; |
309 | ec *r = (ec *)v[3].buf; |
310 | ec c = EC_INIT; |
311 | int ok = 1; |
312 | ec_mul(e, &c, a, n); |
313 | if (!EC_EQ(r, &c)) { |
314 | fprintf(stderr, "mul failed"); |
315 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
316 | fprintf(stderr, "\n a = "); ecdodump(a, stderr); |
317 | fprintf(stderr, "\n n = "); mp_writefile(n, stderr, 10); |
318 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
319 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
320 | fprintf(stderr, "\n"); |
321 | ok = 0; |
322 | } |
323 | EC_DESTROY(a); EC_DESTROY(r); EC_DESTROY(&c); MP_DROP(n); |
324 | ecdestroy(e); |
325 | return (ok); |
326 | } |
327 | |
328 | static int vfind(dstr v[]) |
329 | { |
330 | ec_curve *e = *(ec_curve **)v[0].buf; |
331 | mp *x = *(mp **)v[1].buf; |
332 | ec *r = (ec *)v[2].buf; |
333 | ec c = EC_INIT; |
334 | int ok = 1; |
335 | if (!ec_find(e, &c, x)) EC_SETINF(&c); |
336 | if (!EC_EQ(r, &c)) { |
337 | fprintf(stderr, "find failed"); |
338 | fprintf(stderr, "\ncurve = "); type_ecurve.dump(v, stderr); |
339 | fprintf(stderr, "\n x = "); mp_writefile(x, stderr, 16); |
340 | fprintf(stderr, "\n r = "); ecdodump(r, stderr); |
341 | fprintf(stderr, "\n c = "); ecdodump(&c, stderr); |
342 | fprintf(stderr, "\n"); |
343 | ok = 0; |
344 | } |
345 | MP_DROP(x); EC_DESTROY(r); EC_DESTROY(&c); |
346 | ecdestroy(e); |
347 | return (ok); |
348 | } |
349 | |
350 | static test_chunk tests[] = { |
351 | { "neg", vneg, { &type_ecurve, &type_ec, &type_ec } }, |
352 | { "dbl", vdbl, { &type_ecurve, &type_ec, &type_ec } }, |
353 | { "add", vadd, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
354 | { "sub", vsub, { &type_ecurve, &type_ec, &type_ec, &type_ec } }, |
355 | { "mul", vmul, { &type_ecurve, &type_ec, &type_mp, &type_ec } }, |
356 | { "check", vcheck, { &type_ecurve, &type_ec, &type_int } }, |
357 | { "find", vfind, { &type_ecurve, &type_mp, &type_ec } }, |
358 | { 0, 0, { 0 } } |
359 | }; |
360 | |
361 | int main(int argc, char *argv[]) |
362 | { |
363 | sub_init(); |
364 | test_run(argc, argv, tests, SRCDIR "/tests/ec"); |
365 | return (0); |
366 | } |
367 | |
368 | #endif |
369 | |
370 | /*----- That's all, folks -------------------------------------------------*/ |