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1 /* crypto/ecdsa/ecdsatest.c */
3 * Written by Nils Larsch for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
61 * Portions of the attached software ("Contribution") are developed by
62 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
64 * The Contribution is licensed pursuant to the OpenSSL open source
65 * license provided above.
67 * The elliptic curve binary polynomial software is originally written by
68 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
76 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_EC is defined */
79 int main(int argc
, char *argv
[])
81 puts("Elliptic curves are disabled.");
86 # include <openssl/crypto.h>
87 # include <openssl/bio.h>
88 # include <openssl/evp.h>
89 # include <openssl/bn.h>
90 # include <openssl/ec.h>
91 # ifndef OPENSSL_NO_ENGINE
92 # include <openssl/engine.h>
94 # include <openssl/err.h>
95 # include <openssl/rand.h>
97 static const char rnd_seed
[] = "string to make the random number generator "
98 "think it has entropy";
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
*);
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
);
110 static RAND_METHOD fake_rand
;
111 static const RAND_METHOD
*old_rand
;
113 int change_rand(void)
115 /* save old rand method */
116 if ((old_rand
= RAND_get_rand_method()) == NULL
)
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
))
132 int restore_rand(void)
134 if (!RAND_set_rand_method(old_rand
))
140 static int fbytes_counter
= 0, use_fake
= 0;
141 static const char *numbers
[8] = {
142 "651056770906015076056810763456358567190100156695615665659",
143 "6140507067065001063065065565667405560006161556565665656654",
144 "8763001015071075675010661307616710783570106710677817767166"
146 "7000000175690566466555057817571571075705015757757057795755"
148 "1275552191113212300012030439187146164646146646466749494799",
149 "1542725565216523985789236956265265265235675811949404040041",
150 "1456427555219115346513212300075341203043918714616464614664"
152 "1712787255652165239672857892369562652652652356758119494040"
156 int fbytes(unsigned char *buf
, int num
)
162 return old_rand
->bytes(buf
, num
);
166 if (fbytes_counter
>= 8)
171 if (!BN_dec2bn(&tmp
, numbers
[fbytes_counter
])) {
176 if (num
!= BN_num_bytes(tmp
) || !BN_bn2bin(tmp
, buf
))
184 /* some tests from the X9.62 draft */
185 int x9_62_test_internal(BIO
*out
, int nid
, const char *r_in
, const char *s_in
)
188 const char message
[] = "abc";
189 unsigned char digest
[20];
190 unsigned int dgst_len
= 0;
191 EVP_MD_CTX
*md_ctx
= EVP_MD_CTX_new();
193 ECDSA_SIG
*signature
= NULL
;
194 BIGNUM
*r
= NULL
, *s
= NULL
;
195 BIGNUM
*kinv
= NULL
, *rp
= NULL
;
196 BIGNUM
*sig_r
, *sig_s
;
201 /* get the message digest */
202 if (!EVP_DigestInit(md_ctx
, EVP_sha1())
203 || !EVP_DigestUpdate(md_ctx
, (const void *)message
, 3)
204 || !EVP_DigestFinal(md_ctx
, digest
, &dgst_len
))
207 BIO_printf(out
, "testing %s: ", OBJ_nid2sn(nid
));
209 if ((key
= EC_KEY_new_by_curve_name(nid
)) == NULL
)
212 if (!EC_KEY_generate_key(key
))
214 BIO_printf(out
, ".");
215 (void)BIO_flush(out
);
216 /* create the signature */
218 /* Use ECDSA_sign_setup to avoid use of ECDSA nonces */
219 if (!ECDSA_sign_setup(key
, NULL
, &kinv
, &rp
))
221 signature
= ECDSA_do_sign_ex(digest
, 20, kinv
, rp
, key
);
222 if (signature
== NULL
)
224 BIO_printf(out
, ".");
225 (void)BIO_flush(out
);
226 /* compare the created signature with the expected signature */
227 if ((r
= BN_new()) == NULL
|| (s
= BN_new()) == NULL
)
229 if (!BN_dec2bn(&r
, r_in
) || !BN_dec2bn(&s
, s_in
))
231 ECDSA_SIG_get0(&sig_r
, &sig_s
, signature
);
232 if (BN_cmp(sig_r
, r
) || BN_cmp(sig_s
, s
))
234 BIO_printf(out
, ".");
235 (void)BIO_flush(out
);
236 /* verify the signature */
237 if (ECDSA_do_verify(digest
, 20, signature
, key
) != 1)
239 BIO_printf(out
, ".");
240 (void)BIO_flush(out
);
242 BIO_printf(out
, " ok\n");
246 BIO_printf(out
, " failed\n");
248 ECDSA_SIG_free(signature
);
251 EVP_MD_CTX_free(md_ctx
);
257 int x9_62_tests(BIO
*out
)
261 BIO_printf(out
, "some tests from X9.62:\n");
263 /* set own rand method */
267 if (!x9_62_test_internal(out
, NID_X9_62_prime192v1
,
268 "3342403536405981729393488334694600415596881826869351677613",
269 "5735822328888155254683894997897571951568553642892029982342"))
271 if (!x9_62_test_internal(out
, NID_X9_62_prime239v1
,
272 "3086361431751678114926225473006680188549593787585317781474"
274 "3238135532097973577080787768312505059318910517550078427819"
277 # ifndef OPENSSL_NO_EC2M
278 if (!x9_62_test_internal(out
, NID_X9_62_c2tnb191v1
,
279 "87194383164871543355722284926904419997237591535066528048",
280 "308992691965804947361541664549085895292153777025772063598"))
282 if (!x9_62_test_internal(out
, NID_X9_62_c2tnb239v1
,
283 "2159633321041961198501834003903461262881815148684178964245"
285 "1970303740007316867383349976549972270528498040721988191026"
296 int test_builtin(BIO
*out
)
298 EC_builtin_curve
*curves
= NULL
;
299 size_t crv_len
= 0, n
= 0;
300 EC_KEY
*eckey
= NULL
, *wrong_eckey
= NULL
;
302 ECDSA_SIG
*ecdsa_sig
= NULL
;
303 unsigned char digest
[20], wrong_digest
[20];
304 unsigned char *signature
= NULL
;
305 const unsigned char *sig_ptr
;
306 unsigned char *sig_ptr2
;
307 unsigned char *raw_buf
= NULL
;
308 BIGNUM
*sig_r
, *sig_s
;
309 unsigned int sig_len
, degree
, r_len
, s_len
, bn_len
, buf_len
;
312 /* fill digest values with some random data */
313 if (RAND_bytes(digest
, 20) <= 0 || RAND_bytes(wrong_digest
, 20) <= 0) {
314 BIO_printf(out
, "ERROR: unable to get random data\n");
319 * create and verify a ecdsa signature with every availble curve (with )
321 BIO_printf(out
, "\ntesting ECDSA_sign() and ECDSA_verify() "
322 "with some internal curves:\n");
324 /* get a list of all internal curves */
325 crv_len
= EC_get_builtin_curves(NULL
, 0);
326 curves
= OPENSSL_malloc(sizeof(*curves
) * crv_len
);
327 if (curves
== NULL
) {
328 BIO_printf(out
, "malloc error\n");
332 if (!EC_get_builtin_curves(curves
, crv_len
)) {
333 BIO_printf(out
, "unable to get internal curves\n");
337 /* now create and verify a signature for every curve */
338 for (n
= 0; n
< crv_len
; n
++) {
339 unsigned char dirt
, offset
;
342 if (nid
== NID_ipsec4
)
344 /* create new ecdsa key (== EC_KEY) */
345 if ((eckey
= EC_KEY_new()) == NULL
)
347 group
= EC_GROUP_new_by_curve_name(nid
);
350 if (EC_KEY_set_group(eckey
, group
) == 0)
352 EC_GROUP_free(group
);
353 degree
= EC_GROUP_get_degree(EC_KEY_get0_group(eckey
));
360 BIO_printf(out
, "%s: ", OBJ_nid2sn(nid
));
362 if (!EC_KEY_generate_key(eckey
)) {
363 BIO_printf(out
, " failed\n");
366 /* create second key */
367 if ((wrong_eckey
= EC_KEY_new()) == NULL
)
369 group
= EC_GROUP_new_by_curve_name(nid
);
372 if (EC_KEY_set_group(wrong_eckey
, group
) == 0)
374 EC_GROUP_free(group
);
375 if (!EC_KEY_generate_key(wrong_eckey
)) {
376 BIO_printf(out
, " failed\n");
380 BIO_printf(out
, ".");
381 (void)BIO_flush(out
);
383 if (!EC_KEY_check_key(eckey
)) {
384 BIO_printf(out
, " failed\n");
387 BIO_printf(out
, ".");
388 (void)BIO_flush(out
);
389 /* create signature */
390 sig_len
= ECDSA_size(eckey
);
391 if ((signature
= OPENSSL_malloc(sig_len
)) == NULL
)
393 if (!ECDSA_sign(0, digest
, 20, signature
, &sig_len
, eckey
)) {
394 BIO_printf(out
, " failed\n");
397 BIO_printf(out
, ".");
398 (void)BIO_flush(out
);
399 /* verify signature */
400 if (ECDSA_verify(0, digest
, 20, signature
, sig_len
, eckey
) != 1) {
401 BIO_printf(out
, " failed\n");
404 BIO_printf(out
, ".");
405 (void)BIO_flush(out
);
406 /* verify signature with the wrong key */
407 if (ECDSA_verify(0, digest
, 20, signature
, sig_len
, wrong_eckey
) == 1) {
408 BIO_printf(out
, " failed\n");
411 BIO_printf(out
, ".");
412 (void)BIO_flush(out
);
414 if (ECDSA_verify(0, wrong_digest
, 20, signature
, sig_len
, eckey
) == 1) {
415 BIO_printf(out
, " failed\n");
418 BIO_printf(out
, ".");
419 (void)BIO_flush(out
);
421 if (ECDSA_verify(0, digest
, 20, signature
, sig_len
- 1, eckey
) == 1) {
422 BIO_printf(out
, " failed\n");
425 BIO_printf(out
, ".");
426 (void)BIO_flush(out
);
429 * Modify a single byte of the signature: to ensure we don't garble
430 * the ASN1 structure, we read the raw signature and modify a byte in
431 * one of the bignums directly.
434 if ((ecdsa_sig
= d2i_ECDSA_SIG(NULL
, &sig_ptr
, sig_len
)) == NULL
) {
435 BIO_printf(out
, " failed\n");
439 ECDSA_SIG_get0(&sig_r
, &sig_s
, ecdsa_sig
);
441 /* Store the two BIGNUMs in raw_buf. */
442 r_len
= BN_num_bytes(sig_r
);
443 s_len
= BN_num_bytes(sig_s
);
444 bn_len
= (degree
+ 7) / 8;
445 if ((r_len
> bn_len
) || (s_len
> bn_len
)) {
446 BIO_printf(out
, " failed\n");
449 buf_len
= 2 * bn_len
;
450 if ((raw_buf
= OPENSSL_zalloc(buf_len
)) == NULL
)
452 BN_bn2bin(sig_r
, raw_buf
+ bn_len
- r_len
);
453 BN_bn2bin(sig_s
, raw_buf
+ buf_len
- s_len
);
455 /* Modify a single byte in the buffer. */
456 offset
= raw_buf
[10] % buf_len
;
457 dirt
= raw_buf
[11] ? raw_buf
[11] : 1;
458 raw_buf
[offset
] ^= dirt
;
459 /* Now read the BIGNUMs back in from raw_buf. */
460 if ((BN_bin2bn(raw_buf
, bn_len
, sig_r
) == NULL
) ||
461 (BN_bin2bn(raw_buf
+ bn_len
, bn_len
, sig_s
) == NULL
))
464 sig_ptr2
= signature
;
465 sig_len
= i2d_ECDSA_SIG(ecdsa_sig
, &sig_ptr2
);
466 if (ECDSA_verify(0, digest
, 20, signature
, sig_len
, eckey
) == 1) {
467 BIO_printf(out
, " failed\n");
471 * Sanity check: undo the modification and verify signature.
473 raw_buf
[offset
] ^= dirt
;
474 if ((BN_bin2bn(raw_buf
, bn_len
, sig_r
) == NULL
) ||
475 (BN_bin2bn(raw_buf
+ bn_len
, bn_len
, sig_s
) == NULL
))
478 sig_ptr2
= signature
;
479 sig_len
= i2d_ECDSA_SIG(ecdsa_sig
, &sig_ptr2
);
480 if (ECDSA_verify(0, digest
, 20, signature
, sig_len
, eckey
) != 1) {
481 BIO_printf(out
, " failed\n");
484 BIO_printf(out
, ".");
485 (void)BIO_flush(out
);
487 BIO_printf(out
, " ok\n");
489 /* clean bogus errors */
491 OPENSSL_free(signature
);
495 EC_KEY_free(wrong_eckey
);
497 ECDSA_SIG_free(ecdsa_sig
);
499 OPENSSL_free(raw_buf
);
506 EC_KEY_free(wrong_eckey
);
507 ECDSA_SIG_free(ecdsa_sig
);
508 OPENSSL_free(signature
);
509 OPENSSL_free(raw_buf
);
510 OPENSSL_free(curves
);
521 out
= BIO_new_fp(stdout
, BIO_NOCLOSE
| BIO_FP_TEXT
);
523 p
= getenv("OPENSSL_DEBUG_MEMORY");
524 if (p
!= NULL
&& strcmp(p
, "on") == 0)
525 CRYPTO_set_mem_debug(1);
526 ERR_load_crypto_strings();
528 /* initialize the prng */
529 RAND_seed(rnd_seed
, sizeof(rnd_seed
));
532 if (!x9_62_tests(out
))
534 if (!test_builtin(out
))
540 BIO_printf(out
, "\nECDSA test failed\n");
542 BIO_printf(out
, "\nECDSA test passed\n");
544 ERR_print_errors(out
);
545 CRYPTO_cleanup_all_ex_data();
546 ERR_remove_thread_state(NULL
);
548 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
549 CRYPTO_mem_leaks(out
);