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.
72 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
73 * deprecated functions for openssl-internal code */
74 #ifdef OPENSSL_NO_DEPRECATED
75 #undef OPENSSL_NO_DEPRECATED
82 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */
84 #ifdef OPENSSL_NO_ECDSA
85 int main(int argc, char * argv[])
87 puts("Elliptic curves are disabled.");
92 #include <openssl/crypto.h>
93 #include <openssl/bio.h>
94 #include <openssl/evp.h>
95 #include <openssl/ecdsa.h>
96 #ifndef OPENSSL_NO_ENGINE
97 #include <openssl/engine.h>
99 #include <openssl/err.h>
100 #include <openssl/rand.h>
102 static const char rnd_seed[] = "string to make the random number generator "
103 "think it has entropy";
105 /* declaration of the test functions */
106 int x9_62_tests(BIO *);
107 int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
108 int test_builtin(BIO *);
110 /* functions to change the RAND_METHOD */
111 int change_rand(void);
112 int restore_rand(void);
113 int fbytes(unsigned char *buf, int num);
115 RAND_METHOD fake_rand;
116 const RAND_METHOD *old_rand;
118 int change_rand(void)
120 /* save old rand method */
121 if ((old_rand = RAND_get_rand_method()) == NULL)
124 fake_rand.seed = old_rand->seed;
125 fake_rand.cleanup = old_rand->cleanup;
126 fake_rand.add = old_rand->add;
127 fake_rand.status = old_rand->status;
128 /* use own random function */
129 fake_rand.bytes = fbytes;
130 fake_rand.pseudorand = old_rand->bytes;
131 /* set new RAND_METHOD */
132 if (!RAND_set_rand_method(&fake_rand))
137 int restore_rand(void)
139 if (!RAND_set_rand_method(old_rand))
145 static int fbytes_counter = 0;
146 static const char *numbers[8] = {
147 "651056770906015076056810763456358567190100156695615665659",
148 "6140507067065001063065065565667405560006161556565665656654",
149 "8763001015071075675010661307616710783570106710677817767166"
151 "7000000175690566466555057817571571075705015757757057795755"
153 "1275552191113212300012030439187146164646146646466749494799",
154 "1542725565216523985789236956265265265235675811949404040041",
155 "1456427555219115346513212300075341203043918714616464614664"
157 "1712787255652165239672857892369562652652652356758119494040"
160 int fbytes(unsigned char *buf, int num)
165 if (fbytes_counter >= 8)
170 if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
176 ret = BN_bn2bin(tmp, buf);
177 if (ret == 0 || ret != num)
186 /* some tests from the X9.62 draft */
187 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
190 const char message[] = "abc";
191 unsigned char digest[20];
192 unsigned int dgst_len = 0;
195 ECDSA_SIG *signature = NULL;
196 BIGNUM *r = NULL, *s = NULL;
198 EVP_MD_CTX_init(&md_ctx);
199 /* get the message digest */
200 EVP_DigestInit(&md_ctx, EVP_ecdsa());
201 EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
202 EVP_DigestFinal(&md_ctx, digest, &dgst_len);
204 BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
206 if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
208 if (!EC_KEY_generate_key(key))
210 BIO_printf(out, ".");
212 /* create the signature */
213 signature = ECDSA_do_sign(digest, 20, key);
214 if (signature == NULL)
216 BIO_printf(out, ".");
218 /* compare the created signature with the expected signature */
219 if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
221 if (!BN_dec2bn(&r, r_in) ||
222 !BN_dec2bn(&s, s_in))
224 if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
226 BIO_printf(out, ".");
228 /* verify the signature */
229 if (ECDSA_do_verify(digest, 20, signature, key) != 1)
231 BIO_printf(out, ".");
234 BIO_printf(out, " ok\n");
238 BIO_printf(out, " failed\n");
242 ECDSA_SIG_free(signature);
247 EVP_MD_CTX_cleanup(&md_ctx);
251 int x9_62_tests(BIO *out)
255 BIO_printf(out, "some tests from X9.62:\n");
257 /* set own rand method */
261 if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
262 "3342403536405981729393488334694600415596881826869351677613",
263 "5735822328888155254683894997897571951568553642892029982342"))
265 if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
266 "3086361431751678114926225473006680188549593787585317781474"
268 "3238135532097973577080787768312505059318910517550078427819"
271 if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
272 "87194383164871543355722284926904419997237591535066528048",
273 "308992691965804947361541664549085895292153777025772063598"))
275 if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
276 "2159633321041961198501834003903461262881815148684178964245"
278 "1970303740007316867383349976549972270528498040721988191026"
289 int test_builtin(BIO *out)
291 EC_builtin_curve *curves = NULL;
292 size_t crv_len = 0, n = 0;
293 EC_KEY *eckey = NULL, *wrong_eckey = NULL;
295 unsigned char digest[20], wrong_digest[20];
296 unsigned char *signature = NULL;
297 unsigned int sig_len;
300 /* fill digest values with some random data */
301 if (!RAND_pseudo_bytes(digest, 20) ||
302 !RAND_pseudo_bytes(wrong_digest, 20))
304 BIO_printf(out, "ERROR: unable to get random data\n");
308 /* create and verify a ecdsa signature with every availble curve
310 BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
311 "with some internal curves:\n");
313 /* get a list of all internal curves */
314 crv_len = EC_get_builtin_curves(NULL, 0);
316 curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
320 BIO_printf(out, "malloc error\n");
324 if (!EC_get_builtin_curves(curves, crv_len))
326 BIO_printf(out, "unable to get internal curves\n");
330 /* now create and verify a signature for every curve */
331 for (n = 0; n < crv_len; n++)
333 unsigned char dirt, offset;
336 if (nid == NID_ipsec4)
338 /* create new ecdsa key (== EC_KEY) */
339 if ((eckey = EC_KEY_new()) == NULL)
341 group = EC_GROUP_new_by_curve_name(nid);
344 if (EC_KEY_set_group(eckey, group) == 0)
346 EC_GROUP_free(group);
347 if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160)
354 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
356 if (!EC_KEY_generate_key(eckey))
358 BIO_printf(out, " failed\n");
361 /* create second key */
362 if ((wrong_eckey = EC_KEY_new()) == NULL)
364 group = EC_GROUP_new_by_curve_name(nid);
367 if (EC_KEY_set_group(wrong_eckey, group) == 0)
369 EC_GROUP_free(group);
370 if (!EC_KEY_generate_key(wrong_eckey))
372 BIO_printf(out, " failed\n");
376 BIO_printf(out, ".");
379 if (!EC_KEY_check_key(eckey))
381 BIO_printf(out, " failed\n");
384 BIO_printf(out, ".");
386 /* create signature */
387 sig_len = ECDSA_size(eckey);
388 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
390 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
392 BIO_printf(out, " failed\n");
395 BIO_printf(out, ".");
397 /* verify signature */
398 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
400 BIO_printf(out, " failed\n");
403 BIO_printf(out, ".");
405 /* verify signature with the wrong key */
406 if (ECDSA_verify(0, digest, 20, signature, sig_len,
409 BIO_printf(out, " failed\n");
412 BIO_printf(out, ".");
415 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
418 BIO_printf(out, " failed\n");
421 BIO_printf(out, ".");
423 /* modify a single byte of the signature */
424 offset = signature[10] % sig_len;
425 dirt = signature[11];
426 signature[offset] ^= dirt ? dirt : 1;
427 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
429 BIO_printf(out, " failed\n");
432 BIO_printf(out, ".");
435 BIO_printf(out, " ok\n");
437 OPENSSL_free(signature);
441 EC_KEY_free(wrong_eckey);
450 EC_KEY_free(wrong_eckey);
452 OPENSSL_free(signature);
454 OPENSSL_free(curves);
464 out = BIO_new_fp(stdout, BIO_NOCLOSE);
466 /* enable memory leak checking unless explicitly disabled */
467 if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
468 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
470 CRYPTO_malloc_debug_init();
471 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
475 /* OPENSSL_DEBUG_MEMORY=off */
476 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
478 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
480 ERR_load_crypto_strings();
482 /* initialize the prng */
483 RAND_seed(rnd_seed, sizeof(rnd_seed));
486 if (!x9_62_tests(out)) goto err;
487 if (!test_builtin(out)) goto err;
492 BIO_printf(out, "\nECDSA test failed\n");
494 BIO_printf(out, "\nECDSA test passed\n");
496 ERR_print_errors(out);
497 CRYPTO_cleanup_all_ex_data();
500 CRYPTO_mem_leaks(out);