1 /* crypto/ecdsa/ecdsatest.c */
2 /*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000-2005 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 * licensing@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 *
61 * Portions of the attached software ("Contribution") are developed by
62 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
63 *
64 * The Contribution is licensed pursuant to the OpenSSL open source
65 * license provided above.
66 *
67 * The elliptic curve binary polynomial software is originally written by
68 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
69 *
70 */
71
72 #include <stdio.h>
73 #include <stdlib.h>
74 #include <string.h>
75
76 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */
77
78 #ifdef OPENSSL_NO_ECDSA
main(int argc,char * argv[])79 int main(int argc, char * argv[])
80 {
81 puts("Elliptic curves are disabled.");
82 return 0;
83 }
84 #else
85
86 #include <openssl/crypto.h>
87 #include <openssl/bio.h>
88 #include <openssl/evp.h>
89 #include <openssl/bn.h>
90 #include <openssl/ecdsa.h>
91 #ifndef OPENSSL_NO_ENGINE
92 #include <openssl/engine.h>
93 #endif
94 #include <openssl/err.h>
95 #include <openssl/rand.h>
96
97 static const char rnd_seed[] = "string to make the random number generator "
98 "think it has entropy";
99
100 /* declaration of the test functions */
101 int x9_62_tests(BIO *);
102 int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
103 int test_builtin(BIO *);
104
105 /* functions to change the RAND_METHOD */
106 int change_rand(void);
107 int restore_rand(void);
108 int fbytes(unsigned char *buf, int num);
109
110 RAND_METHOD fake_rand;
111 const RAND_METHOD *old_rand;
112
change_rand(void)113 int change_rand(void)
114 {
115 /* save old rand method */
116 if ((old_rand = RAND_get_rand_method()) == NULL)
117 return 0;
118
119 fake_rand.seed = old_rand->seed;
120 fake_rand.cleanup = old_rand->cleanup;
121 fake_rand.add = old_rand->add;
122 fake_rand.status = old_rand->status;
123 /* use own random function */
124 fake_rand.bytes = fbytes;
125 fake_rand.pseudorand = old_rand->bytes;
126 /* set new RAND_METHOD */
127 if (!RAND_set_rand_method(&fake_rand))
128 return 0;
129 return 1;
130 }
131
restore_rand(void)132 int restore_rand(void)
133 {
134 if (!RAND_set_rand_method(old_rand))
135 return 0;
136 else
137 return 1;
138 }
139
140 static int fbytes_counter = 0;
141 static const char *numbers[8] = {
142 "651056770906015076056810763456358567190100156695615665659",
143 "6140507067065001063065065565667405560006161556565665656654",
144 "8763001015071075675010661307616710783570106710677817767166"
145 "71676178726717",
146 "7000000175690566466555057817571571075705015757757057795755"
147 "55657156756655",
148 "1275552191113212300012030439187146164646146646466749494799",
149 "1542725565216523985789236956265265265235675811949404040041",
150 "1456427555219115346513212300075341203043918714616464614664"
151 "64667494947990",
152 "1712787255652165239672857892369562652652652356758119494040"
153 "40041670216363"};
154
fbytes(unsigned char * buf,int num)155 int fbytes(unsigned char *buf, int num)
156 {
157 int ret;
158 BIGNUM *tmp = NULL;
159
160 if (fbytes_counter >= 8)
161 return 0;
162 tmp = BN_new();
163 if (!tmp)
164 return 0;
165 if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
166 {
167 BN_free(tmp);
168 return 0;
169 }
170 fbytes_counter ++;
171 ret = BN_bn2bin(tmp, buf);
172 if (ret == 0 || ret != num)
173 ret = 0;
174 else
175 ret = 1;
176 if (tmp)
177 BN_free(tmp);
178 return ret;
179 }
180
181 /* some tests from the X9.62 draft */
x9_62_test_internal(BIO * out,int nid,const char * r_in,const char * s_in)182 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
183 {
184 int ret = 0;
185 const char message[] = "abc";
186 unsigned char digest[20];
187 unsigned int dgst_len = 0;
188 EVP_MD_CTX md_ctx;
189 EC_KEY *key = NULL;
190 ECDSA_SIG *signature = NULL;
191 BIGNUM *r = NULL, *s = NULL;
192
193 EVP_MD_CTX_init(&md_ctx);
194 /* get the message digest */
195 EVP_DigestInit(&md_ctx, EVP_ecdsa());
196 EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
197 EVP_DigestFinal(&md_ctx, digest, &dgst_len);
198
199 BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
200 /* create the key */
201 if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
202 goto x962_int_err;
203 if (!EC_KEY_generate_key(key))
204 goto x962_int_err;
205 BIO_printf(out, ".");
206 BIO_flush(out);
207 /* create the signature */
208 signature = ECDSA_do_sign(digest, 20, key);
209 if (signature == NULL)
210 goto x962_int_err;
211 BIO_printf(out, ".");
212 BIO_flush(out);
213 /* compare the created signature with the expected signature */
214 if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
215 goto x962_int_err;
216 if (!BN_dec2bn(&r, r_in) ||
217 !BN_dec2bn(&s, s_in))
218 goto x962_int_err;
219 if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
220 goto x962_int_err;
221 BIO_printf(out, ".");
222 BIO_flush(out);
223 /* verify the signature */
224 if (ECDSA_do_verify(digest, 20, signature, key) != 1)
225 goto x962_int_err;
226 BIO_printf(out, ".");
227 BIO_flush(out);
228
229 BIO_printf(out, " ok\n");
230 ret = 1;
231 x962_int_err:
232 if (!ret)
233 BIO_printf(out, " failed\n");
234 if (key)
235 EC_KEY_free(key);
236 if (signature)
237 ECDSA_SIG_free(signature);
238 if (r)
239 BN_free(r);
240 if (s)
241 BN_free(s);
242 EVP_MD_CTX_cleanup(&md_ctx);
243 return ret;
244 }
245
x9_62_tests(BIO * out)246 int x9_62_tests(BIO *out)
247 {
248 int ret = 0;
249
250 BIO_printf(out, "some tests from X9.62:\n");
251
252 /* set own rand method */
253 if (!change_rand())
254 goto x962_err;
255
256 if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
257 "3342403536405981729393488334694600415596881826869351677613",
258 "5735822328888155254683894997897571951568553642892029982342"))
259 goto x962_err;
260 if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
261 "3086361431751678114926225473006680188549593787585317781474"
262 "62058306432176",
263 "3238135532097973577080787768312505059318910517550078427819"
264 "78505179448783"))
265 goto x962_err;
266 if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
267 "87194383164871543355722284926904419997237591535066528048",
268 "308992691965804947361541664549085895292153777025772063598"))
269 goto x962_err;
270 if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
271 "2159633321041961198501834003903461262881815148684178964245"
272 "5876922391552",
273 "1970303740007316867383349976549972270528498040721988191026"
274 "49413465737174"))
275 goto x962_err;
276
277 ret = 1;
278 x962_err:
279 if (!restore_rand())
280 ret = 0;
281 return ret;
282 }
283
test_builtin(BIO * out)284 int test_builtin(BIO *out)
285 {
286 EC_builtin_curve *curves = NULL;
287 size_t crv_len = 0, n = 0;
288 EC_KEY *eckey = NULL, *wrong_eckey = NULL;
289 EC_GROUP *group;
290 unsigned char digest[20], wrong_digest[20];
291 unsigned char *signature = NULL;
292 unsigned int sig_len;
293 int nid, ret = 0;
294
295 /* fill digest values with some random data */
296 if (!RAND_pseudo_bytes(digest, 20) ||
297 !RAND_pseudo_bytes(wrong_digest, 20))
298 {
299 BIO_printf(out, "ERROR: unable to get random data\n");
300 goto builtin_err;
301 }
302
303 /* create and verify a ecdsa signature with every availble curve
304 * (with ) */
305 BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
306 "with some internal curves:\n");
307
308 /* get a list of all internal curves */
309 crv_len = EC_get_builtin_curves(NULL, 0);
310
311 curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
312
313 if (curves == NULL)
314 {
315 BIO_printf(out, "malloc error\n");
316 goto builtin_err;
317 }
318
319 if (!EC_get_builtin_curves(curves, crv_len))
320 {
321 BIO_printf(out, "unable to get internal curves\n");
322 goto builtin_err;
323 }
324
325 /* now create and verify a signature for every curve */
326 for (n = 0; n < crv_len; n++)
327 {
328 unsigned char dirt, offset;
329
330 nid = curves[n].nid;
331 if (nid == NID_ipsec4)
332 continue;
333 /* create new ecdsa key (== EC_KEY) */
334 if ((eckey = EC_KEY_new()) == NULL)
335 goto builtin_err;
336 group = EC_GROUP_new_by_curve_name(nid);
337 if (group == NULL)
338 goto builtin_err;
339 if (EC_KEY_set_group(eckey, group) == 0)
340 goto builtin_err;
341 EC_GROUP_free(group);
342 if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160)
343 /* drop the curve */
344 {
345 EC_KEY_free(eckey);
346 eckey = NULL;
347 continue;
348 }
349 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
350 /* create key */
351 if (!EC_KEY_generate_key(eckey))
352 {
353 BIO_printf(out, " failed\n");
354 goto builtin_err;
355 }
356 /* create second key */
357 if ((wrong_eckey = EC_KEY_new()) == NULL)
358 goto builtin_err;
359 group = EC_GROUP_new_by_curve_name(nid);
360 if (group == NULL)
361 goto builtin_err;
362 if (EC_KEY_set_group(wrong_eckey, group) == 0)
363 goto builtin_err;
364 EC_GROUP_free(group);
365 if (!EC_KEY_generate_key(wrong_eckey))
366 {
367 BIO_printf(out, " failed\n");
368 goto builtin_err;
369 }
370
371 BIO_printf(out, ".");
372 BIO_flush(out);
373 /* check key */
374 if (!EC_KEY_check_key(eckey))
375 {
376 BIO_printf(out, " failed\n");
377 goto builtin_err;
378 }
379 BIO_printf(out, ".");
380 BIO_flush(out);
381 /* create signature */
382 sig_len = ECDSA_size(eckey);
383 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
384 goto builtin_err;
385 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
386 {
387 BIO_printf(out, " failed\n");
388 goto builtin_err;
389 }
390 BIO_printf(out, ".");
391 BIO_flush(out);
392 /* verify signature */
393 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
394 {
395 BIO_printf(out, " failed\n");
396 goto builtin_err;
397 }
398 BIO_printf(out, ".");
399 BIO_flush(out);
400 /* verify signature with the wrong key */
401 if (ECDSA_verify(0, digest, 20, signature, sig_len,
402 wrong_eckey) == 1)
403 {
404 BIO_printf(out, " failed\n");
405 goto builtin_err;
406 }
407 BIO_printf(out, ".");
408 BIO_flush(out);
409 /* wrong digest */
410 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
411 eckey) == 1)
412 {
413 BIO_printf(out, " failed\n");
414 goto builtin_err;
415 }
416 BIO_printf(out, ".");
417 BIO_flush(out);
418 /* modify a single byte of the signature */
419 offset = signature[10] % sig_len;
420 dirt = signature[11];
421 signature[offset] ^= dirt ? dirt : 1;
422 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
423 {
424 BIO_printf(out, " failed\n");
425 goto builtin_err;
426 }
427 BIO_printf(out, ".");
428 BIO_flush(out);
429
430 BIO_printf(out, " ok\n");
431 /* cleanup */
432 OPENSSL_free(signature);
433 signature = NULL;
434 EC_KEY_free(eckey);
435 eckey = NULL;
436 EC_KEY_free(wrong_eckey);
437 wrong_eckey = NULL;
438 }
439
440 ret = 1;
441 builtin_err:
442 if (eckey)
443 EC_KEY_free(eckey);
444 if (wrong_eckey)
445 EC_KEY_free(wrong_eckey);
446 if (signature)
447 OPENSSL_free(signature);
448 if (curves)
449 OPENSSL_free(curves);
450
451 return ret;
452 }
453
main(void)454 int main(void)
455 {
456 int ret = 1;
457 BIO *out;
458
459 out = BIO_new_fp(stdout, BIO_NOCLOSE);
460
461 /* enable memory leak checking unless explicitly disabled */
462 if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
463 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
464 {
465 CRYPTO_malloc_debug_init();
466 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
467 }
468 else
469 {
470 /* OPENSSL_DEBUG_MEMORY=off */
471 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
472 }
473 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
474
475 ERR_load_crypto_strings();
476
477 /* initialize the prng */
478 RAND_seed(rnd_seed, sizeof(rnd_seed));
479
480 /* the tests */
481 if (!x9_62_tests(out)) goto err;
482 if (!test_builtin(out)) goto err;
483
484 ret = 0;
485 err:
486 if (ret)
487 BIO_printf(out, "\nECDSA test failed\n");
488 else
489 BIO_printf(out, "\nECDSA test passed\n");
490 if (ret)
491 ERR_print_errors(out);
492 CRYPTO_cleanup_all_ex_data();
493 ERR_remove_state(0);
494 ERR_free_strings();
495 CRYPTO_mem_leaks(out);
496 if (out != NULL)
497 BIO_free(out);
498 return ret;
499 }
500 #endif
501