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diff --git a/src/lib/libcrypto/ecdsa/ecdsatest.c b/src/lib/libcrypto/ecdsa/ecdsatest.c
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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
79int 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
97static const char rnd_seed[] = "string to make the random number generator "
98 "think it has entropy";
99
100/* declaration of the test functions */
101int x9_62_tests(BIO *);
102int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
103int test_builtin(BIO *);
104
105/* functions to change the RAND_METHOD */
106int change_rand(void);
107int restore_rand(void);
108int fbytes(unsigned char *buf, int num);
109
110RAND_METHOD fake_rand;
111const RAND_METHOD *old_rand;
112
113int 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
132int restore_rand(void)
133 {
134 if (!RAND_set_rand_method(old_rand))
135 return 0;
136 else
137 return 1;
138 }
139
140static int fbytes_counter = 0;
141static 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
155int 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 if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf))
172 ret = 0;
173 else
174 ret = 1;
175 if (tmp)
176 BN_free(tmp);
177 return ret;
178 }
179
180/* some tests from the X9.62 draft */
181int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
182 {
183 int ret = 0;
184 const char message[] = "abc";
185 unsigned char digest[20];
186 unsigned int dgst_len = 0;
187 EVP_MD_CTX md_ctx;
188 EC_KEY *key = NULL;
189 ECDSA_SIG *signature = NULL;
190 BIGNUM *r = NULL, *s = NULL;
191
192 EVP_MD_CTX_init(&md_ctx);
193 /* get the message digest */
194 EVP_DigestInit(&md_ctx, EVP_ecdsa());
195 EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
196 EVP_DigestFinal(&md_ctx, digest, &dgst_len);
197
198 BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
199 /* create the key */
200 if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
201 goto x962_int_err;
202 if (!EC_KEY_generate_key(key))
203 goto x962_int_err;
204 BIO_printf(out, ".");
205 (void)BIO_flush(out);
206 /* create the signature */
207 signature = ECDSA_do_sign(digest, 20, key);
208 if (signature == NULL)
209 goto x962_int_err;
210 BIO_printf(out, ".");
211 (void)BIO_flush(out);
212 /* compare the created signature with the expected signature */
213 if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
214 goto x962_int_err;
215 if (!BN_dec2bn(&r, r_in) ||
216 !BN_dec2bn(&s, s_in))
217 goto x962_int_err;
218 if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
219 goto x962_int_err;
220 BIO_printf(out, ".");
221 (void)BIO_flush(out);
222 /* verify the signature */
223 if (ECDSA_do_verify(digest, 20, signature, key) != 1)
224 goto x962_int_err;
225 BIO_printf(out, ".");
226 (void)BIO_flush(out);
227
228 BIO_printf(out, " ok\n");
229 ret = 1;
230x962_int_err:
231 if (!ret)
232 BIO_printf(out, " failed\n");
233 if (key)
234 EC_KEY_free(key);
235 if (signature)
236 ECDSA_SIG_free(signature);
237 if (r)
238 BN_free(r);
239 if (s)
240 BN_free(s);
241 EVP_MD_CTX_cleanup(&md_ctx);
242 return ret;
243 }
244
245int x9_62_tests(BIO *out)
246 {
247 int ret = 0;
248
249 BIO_printf(out, "some tests from X9.62:\n");
250
251 /* set own rand method */
252 if (!change_rand())
253 goto x962_err;
254
255 if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
256 "3342403536405981729393488334694600415596881826869351677613",
257 "5735822328888155254683894997897571951568553642892029982342"))
258 goto x962_err;
259 if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
260 "3086361431751678114926225473006680188549593787585317781474"
261 "62058306432176",
262 "3238135532097973577080787768312505059318910517550078427819"
263 "78505179448783"))
264 goto x962_err;
265 if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
266 "87194383164871543355722284926904419997237591535066528048",
267 "308992691965804947361541664549085895292153777025772063598"))
268 goto x962_err;
269 if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
270 "2159633321041961198501834003903461262881815148684178964245"
271 "5876922391552",
272 "1970303740007316867383349976549972270528498040721988191026"
273 "49413465737174"))
274 goto x962_err;
275
276 ret = 1;
277x962_err:
278 if (!restore_rand())
279 ret = 0;
280 return ret;
281 }
282
283int test_builtin(BIO *out)
284 {
285 EC_builtin_curve *curves = NULL;
286 size_t crv_len = 0, n = 0;
287 EC_KEY *eckey = NULL, *wrong_eckey = NULL;
288 EC_GROUP *group;
289 ECDSA_SIG *ecdsa_sig = NULL;
290 unsigned char digest[20], wrong_digest[20];
291 unsigned char *signature = NULL;
292 unsigned char *sig_ptr;
293 unsigned char *raw_buf = NULL;
294 unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len;
295 int nid, ret = 0;
296
297 /* fill digest values with some random data */
298 if (!RAND_pseudo_bytes(digest, 20) ||
299 !RAND_pseudo_bytes(wrong_digest, 20))
300 {
301 BIO_printf(out, "ERROR: unable to get random data\n");
302 goto builtin_err;
303 }
304
305 /* create and verify a ecdsa signature with every availble curve
306 * (with ) */
307 BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
308 "with some internal curves:\n");
309
310 /* get a list of all internal curves */
311 crv_len = EC_get_builtin_curves(NULL, 0);
312
313 curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
314
315 if (curves == NULL)
316 {
317 BIO_printf(out, "malloc error\n");
318 goto builtin_err;
319 }
320
321 if (!EC_get_builtin_curves(curves, crv_len))
322 {
323 BIO_printf(out, "unable to get internal curves\n");
324 goto builtin_err;
325 }
326
327 /* now create and verify a signature for every curve */
328 for (n = 0; n < crv_len; n++)
329 {
330 unsigned char dirt, offset;
331
332 nid = curves[n].nid;
333 if (nid == NID_ipsec4)
334 continue;
335 /* create new ecdsa key (== EC_KEY) */
336 if ((eckey = EC_KEY_new()) == NULL)
337 goto builtin_err;
338 group = EC_GROUP_new_by_curve_name(nid);
339 if (group == NULL)
340 goto builtin_err;
341 if (EC_KEY_set_group(eckey, group) == 0)
342 goto builtin_err;
343 EC_GROUP_free(group);
344 degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey));
345 if (degree < 160)
346 /* drop the curve */
347 {
348 EC_KEY_free(eckey);
349 eckey = NULL;
350 continue;
351 }
352 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
353 /* create key */
354 if (!EC_KEY_generate_key(eckey))
355 {
356 BIO_printf(out, " failed\n");
357 goto builtin_err;
358 }
359 /* create second key */
360 if ((wrong_eckey = EC_KEY_new()) == NULL)
361 goto builtin_err;
362 group = EC_GROUP_new_by_curve_name(nid);
363 if (group == NULL)
364 goto builtin_err;
365 if (EC_KEY_set_group(wrong_eckey, group) == 0)
366 goto builtin_err;
367 EC_GROUP_free(group);
368 if (!EC_KEY_generate_key(wrong_eckey))
369 {
370 BIO_printf(out, " failed\n");
371 goto builtin_err;
372 }
373
374 BIO_printf(out, ".");
375 (void)BIO_flush(out);
376 /* check key */
377 if (!EC_KEY_check_key(eckey))
378 {
379 BIO_printf(out, " failed\n");
380 goto builtin_err;
381 }
382 BIO_printf(out, ".");
383 (void)BIO_flush(out);
384 /* create signature */
385 sig_len = ECDSA_size(eckey);
386 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
387 goto builtin_err;
388 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
389 {
390 BIO_printf(out, " failed\n");
391 goto builtin_err;
392 }
393 BIO_printf(out, ".");
394 (void)BIO_flush(out);
395 /* verify signature */
396 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
397 {
398 BIO_printf(out, " failed\n");
399 goto builtin_err;
400 }
401 BIO_printf(out, ".");
402 (void)BIO_flush(out);
403 /* verify signature with the wrong key */
404 if (ECDSA_verify(0, digest, 20, signature, sig_len,
405 wrong_eckey) == 1)
406 {
407 BIO_printf(out, " failed\n");
408 goto builtin_err;
409 }
410 BIO_printf(out, ".");
411 (void)BIO_flush(out);
412 /* wrong digest */
413 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
414 eckey) == 1)
415 {
416 BIO_printf(out, " failed\n");
417 goto builtin_err;
418 }
419 BIO_printf(out, ".");
420 (void)BIO_flush(out);
421 /* wrong length */
422 if (ECDSA_verify(0, digest, 20, signature, sig_len - 1,
423 eckey) == 1)
424 {
425 BIO_printf(out, " failed\n");
426 goto builtin_err;
427 }
428 BIO_printf(out, ".");
429 (void)BIO_flush(out);
430
431 /* Modify a single byte of the signature: to ensure we don't
432 * garble the ASN1 structure, we read the raw signature and
433 * modify a byte in one of the bignums directly. */
434 sig_ptr = signature;
435 if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == NULL)
436 {
437 BIO_printf(out, " failed\n");
438 goto builtin_err;
439 }
440
441 /* Store the two BIGNUMs in raw_buf. */
442 r_len = BN_num_bytes(ecdsa_sig->r);
443 s_len = BN_num_bytes(ecdsa_sig->s);
444 bn_len = (degree + 7) / 8;
445 if ((r_len > bn_len) || (s_len > bn_len))
446 {
447 BIO_printf(out, " failed\n");
448 goto builtin_err;
449 }
450 buf_len = 2 * bn_len;
451 if ((raw_buf = OPENSSL_malloc(buf_len)) == NULL)
452 goto builtin_err;
453 /* Pad the bignums with leading zeroes. */
454 memset(raw_buf, 0, buf_len);
455 BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len);
456 BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len);
457
458 /* Modify a single byte in the buffer. */
459 offset = raw_buf[10] % buf_len;
460 dirt = raw_buf[11] ? raw_buf[11] : 1;
461 raw_buf[offset] ^= dirt;
462 /* Now read the BIGNUMs back in from raw_buf. */
463 if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) ||
464 (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL))
465 goto builtin_err;
466
467 sig_ptr = signature;
468 sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr);
469 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
470 {
471 BIO_printf(out, " failed\n");
472 goto builtin_err;
473 }
474 /* Sanity check: undo the modification and verify signature. */
475 raw_buf[offset] ^= dirt;
476 if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) ||
477 (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL))
478 goto builtin_err;
479
480 sig_ptr = signature;
481 sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr);
482 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
483 {
484 BIO_printf(out, " failed\n");
485 goto builtin_err;
486 }
487 BIO_printf(out, ".");
488 (void)BIO_flush(out);
489
490 BIO_printf(out, " ok\n");
491 /* cleanup */
492 /* clean bogus errors */
493 ERR_clear_error();
494 OPENSSL_free(signature);
495 signature = NULL;
496 EC_KEY_free(eckey);
497 eckey = NULL;
498 EC_KEY_free(wrong_eckey);
499 wrong_eckey = NULL;
500 ECDSA_SIG_free(ecdsa_sig);
501 ecdsa_sig = NULL;
502 OPENSSL_free(raw_buf);
503 raw_buf = NULL;
504 }
505
506 ret = 1;
507builtin_err:
508 if (eckey)
509 EC_KEY_free(eckey);
510 if (wrong_eckey)
511 EC_KEY_free(wrong_eckey);
512 if (ecdsa_sig)
513 ECDSA_SIG_free(ecdsa_sig);
514 if (signature)
515 OPENSSL_free(signature);
516 if (raw_buf)
517 OPENSSL_free(raw_buf);
518 if (curves)
519 OPENSSL_free(curves);
520
521 return ret;
522 }
523
524int main(void)
525 {
526 int ret = 1;
527 BIO *out;
528
529 out = BIO_new_fp(stdout, BIO_NOCLOSE);
530
531 /* enable memory leak checking unless explicitly disabled */
532 if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
533 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
534 {
535 CRYPTO_malloc_debug_init();
536 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
537 }
538 else
539 {
540 /* OPENSSL_DEBUG_MEMORY=off */
541 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
542 }
543 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
544
545 ERR_load_crypto_strings();
546
547 /* initialize the prng */
548 RAND_seed(rnd_seed, sizeof(rnd_seed));
549
550 /* the tests */
551 if (!x9_62_tests(out)) goto err;
552 if (!test_builtin(out)) goto err;
553
554 ret = 0;
555err:
556 if (ret)
557 BIO_printf(out, "\nECDSA test failed\n");
558 else
559 BIO_printf(out, "\nECDSA test passed\n");
560 if (ret)
561 ERR_print_errors(out);
562 CRYPTO_cleanup_all_ex_data();
563 ERR_remove_thread_state(NULL);
564 ERR_free_strings();
565 CRYPTO_mem_leaks(out);
566 if (out != NULL)
567 BIO_free(out);
568 return ret;
569 }
570#endif
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