Update HEAD CHANGES file.
[openssl.git] / crypto / ecdsa / ecdsatest.c
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
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
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
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, use_fake = 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
155 int fbytes(unsigned char *buf, int num)
156         {
157         int     ret;
158         BIGNUM  *tmp = NULL;
159
160         if (use_fake == 0)
161                 return old_rand->bytes(buf, num);
162
163         use_fake = 0;
164
165         if (fbytes_counter >= 8)
166                 return 0;
167         tmp = BN_new();
168         if (!tmp)
169                 return 0;
170         if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
171                 {
172                 BN_free(tmp);
173                 return 0;
174                 }
175         fbytes_counter ++;
176         if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf))
177                 ret = 0;
178         else 
179                 ret = 1;
180         if (tmp)
181                 BN_free(tmp);
182         return ret;
183         }
184
185 /* some tests from the X9.62 draft */
186 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
187         {
188         int     ret = 0;
189         const char message[] = "abc";
190         unsigned char digest[20];
191         unsigned int  dgst_len = 0;
192         EVP_MD_CTX md_ctx;
193         EC_KEY    *key = NULL;
194         ECDSA_SIG *signature = NULL;
195         BIGNUM    *r = NULL, *s = NULL;
196
197         EVP_MD_CTX_init(&md_ctx);
198         /* get the message digest */
199         if (!EVP_DigestInit(&md_ctx, EVP_ecdsa())
200             || !EVP_DigestUpdate(&md_ctx, (const void*)message, 3)
201             || !EVP_DigestFinal(&md_ctx, digest, &dgst_len))
202                 goto x962_int_err;
203
204         BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
205         /* create the key */
206         if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
207                 goto x962_int_err;
208         use_fake = 1;
209         if (!EC_KEY_generate_key(key))
210                 goto x962_int_err;
211         BIO_printf(out, ".");
212         (void)BIO_flush(out);
213         /* create the signature */
214         use_fake = 1;
215         signature = ECDSA_do_sign(digest, 20, key);
216         if (signature == NULL)
217                 goto x962_int_err;
218         BIO_printf(out, ".");
219         (void)BIO_flush(out);
220         /* compare the created signature with the expected signature */
221         if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
222                 goto x962_int_err;
223         if (!BN_dec2bn(&r, r_in) ||
224             !BN_dec2bn(&s, s_in))
225                 goto x962_int_err;
226         if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
227                 goto x962_int_err;
228         BIO_printf(out, ".");
229         (void)BIO_flush(out);
230         /* verify the signature */
231         if (ECDSA_do_verify(digest, 20, signature, key) != 1)
232                 goto x962_int_err;
233         BIO_printf(out, ".");
234         (void)BIO_flush(out);
235
236         BIO_printf(out, " ok\n");
237         ret = 1;
238 x962_int_err:
239         if (!ret)
240                 BIO_printf(out, " failed\n");
241         if (key)
242                 EC_KEY_free(key);
243         if (signature)
244                 ECDSA_SIG_free(signature);
245         if (r)
246                 BN_free(r);
247         if (s)
248                 BN_free(s);
249         EVP_MD_CTX_cleanup(&md_ctx);
250         return ret;
251         }
252
253 int x9_62_tests(BIO *out)
254         {
255         int ret = 0;
256
257         BIO_printf(out, "some tests from X9.62:\n");
258
259         /* set own rand method */
260         if (!change_rand())
261                 goto x962_err;
262
263         if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
264                 "3342403536405981729393488334694600415596881826869351677613",
265                 "5735822328888155254683894997897571951568553642892029982342"))
266                 goto x962_err;
267         if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
268                 "3086361431751678114926225473006680188549593787585317781474"
269                 "62058306432176",
270                 "3238135532097973577080787768312505059318910517550078427819"
271                 "78505179448783"))
272                 goto x962_err;
273 #ifndef OPENSSL_NO_EC2M
274         if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
275                 "87194383164871543355722284926904419997237591535066528048",
276                 "308992691965804947361541664549085895292153777025772063598"))
277                 goto x962_err;
278         if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
279                 "2159633321041961198501834003903461262881815148684178964245"
280                 "5876922391552",
281                 "1970303740007316867383349976549972270528498040721988191026"
282                 "49413465737174"))
283                 goto x962_err;
284 #endif
285         ret = 1;
286 x962_err:
287         if (!restore_rand())
288                 ret = 0;
289         return ret;
290         }
291
292 int test_builtin(BIO *out)
293         {
294         EC_builtin_curve *curves = NULL;
295         size_t          crv_len = 0, n = 0;
296         EC_KEY          *eckey = NULL, *wrong_eckey = NULL;
297         EC_GROUP        *group;
298         unsigned char   digest[20], wrong_digest[20];
299         unsigned char   *signature = NULL; 
300         unsigned int    sig_len;
301         int             nid, ret =  0;
302         
303         /* fill digest values with some random data */
304         if (!RAND_pseudo_bytes(digest, 20) ||
305             !RAND_pseudo_bytes(wrong_digest, 20))
306                 {
307                 BIO_printf(out, "ERROR: unable to get random data\n");
308                 goto builtin_err;
309                 }
310
311         /* create and verify a ecdsa signature with every availble curve
312          * (with ) */
313         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
314                 "with some internal curves:\n");
315
316         /* get a list of all internal curves */
317         crv_len = EC_get_builtin_curves(NULL, 0);
318
319         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
320
321         if (curves == NULL)
322                 {
323                 BIO_printf(out, "malloc error\n");
324                 goto builtin_err;
325                 }
326         
327         if (!EC_get_builtin_curves(curves, crv_len))
328                 {
329                 BIO_printf(out, "unable to get internal curves\n");
330                 goto builtin_err;
331                 }
332
333         /* now create and verify a signature for every curve */
334         for (n = 0; n < crv_len; n++)
335                 {
336                 unsigned char dirt, offset;
337
338                 nid = curves[n].nid;
339                 if (nid == NID_ipsec4)
340                         continue;
341                 /* create new ecdsa key (== EC_KEY) */
342                 if ((eckey = EC_KEY_new()) == NULL)
343                         goto builtin_err;
344                 group = EC_GROUP_new_by_curve_name(nid);
345                 if (group == NULL)
346                         goto builtin_err;
347                 if (EC_KEY_set_group(eckey, group) == 0)
348                         goto builtin_err;
349                 EC_GROUP_free(group);
350                 if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160)
351                         /* drop the curve */ 
352                         {
353                         EC_KEY_free(eckey);
354                         eckey = NULL;
355                         continue;
356                         }
357                 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
358                 /* create key */
359                 if (!EC_KEY_generate_key(eckey))
360                         {
361                         BIO_printf(out, " failed\n");
362                         goto builtin_err;
363                         }
364                 /* create second key */
365                 if ((wrong_eckey = EC_KEY_new()) == NULL)
366                         goto builtin_err;
367                 group = EC_GROUP_new_by_curve_name(nid);
368                 if (group == NULL)
369                         goto builtin_err;
370                 if (EC_KEY_set_group(wrong_eckey, group) == 0)
371                         goto builtin_err;
372                 EC_GROUP_free(group);
373                 if (!EC_KEY_generate_key(wrong_eckey))
374                         {
375                         BIO_printf(out, " failed\n");
376                         goto builtin_err;
377                         }
378
379                 BIO_printf(out, ".");
380                 (void)BIO_flush(out);
381                 /* check key */
382                 if (!EC_KEY_check_key(eckey))
383                         {
384                         BIO_printf(out, " failed\n");
385                         goto builtin_err;
386                         }
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)
392                         goto builtin_err;
393                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
394                         {
395                         BIO_printf(out, " failed\n");
396                         goto builtin_err;
397                         }
398                 BIO_printf(out, ".");
399                 (void)BIO_flush(out);
400                 /* verify signature */
401                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
402                         {
403                         BIO_printf(out, " failed\n");
404                         goto builtin_err;
405                         }
406                 BIO_printf(out, ".");
407                 (void)BIO_flush(out);
408                 /* verify signature with the wrong key */
409                 if (ECDSA_verify(0, digest, 20, signature, sig_len, 
410                         wrong_eckey) == 1)
411                         {
412                         BIO_printf(out, " failed\n");
413                         goto builtin_err;
414                         }
415                 BIO_printf(out, ".");
416                 (void)BIO_flush(out);
417                 /* wrong digest */
418                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
419                         eckey) == 1)
420                         {
421                         BIO_printf(out, " failed\n");
422                         goto builtin_err;
423                         }
424                 BIO_printf(out, ".");
425                 (void)BIO_flush(out);
426                 /* modify a single byte of the signature */
427                 offset = signature[10] % sig_len;
428                 dirt   = signature[11];
429                 signature[offset] ^= dirt ? dirt : 1; 
430                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
431                         {
432                         BIO_printf(out, " failed\n");
433                         goto builtin_err;
434                         }
435                 BIO_printf(out, ".");
436                 (void)BIO_flush(out);
437                 
438                 BIO_printf(out, " ok\n");
439                 /* cleanup */
440                 OPENSSL_free(signature);
441                 signature = NULL;
442                 EC_KEY_free(eckey);
443                 eckey = NULL;
444                 EC_KEY_free(wrong_eckey);
445                 wrong_eckey = NULL;
446                 }
447
448         ret = 1;        
449 builtin_err:
450         if (eckey)
451                 EC_KEY_free(eckey);
452         if (wrong_eckey)
453                 EC_KEY_free(wrong_eckey);
454         if (signature)
455                 OPENSSL_free(signature);
456         if (curves)
457                 OPENSSL_free(curves);
458
459         return ret;
460         }
461
462 int main(void)
463         {
464         int     ret = 1;
465         BIO     *out;
466
467         out = BIO_new_fp(stdout, BIO_NOCLOSE);
468         
469         /* enable memory leak checking unless explicitly disabled */
470         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && 
471                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
472                 {
473                 CRYPTO_malloc_debug_init();
474                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
475                 }
476         else
477                 {
478                 /* OPENSSL_DEBUG_MEMORY=off */
479                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
480                 }
481         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
482
483         ERR_load_crypto_strings();
484
485         /* initialize the prng */
486         RAND_seed(rnd_seed, sizeof(rnd_seed));
487
488         /* the tests */
489         if (!x9_62_tests(out))  goto err;
490         if (!test_builtin(out)) goto err;
491         
492         ret = 0;
493 err:    
494         if (ret)        
495                 BIO_printf(out, "\nECDSA test failed\n");
496         else 
497                 BIO_printf(out, "\nECDSA test passed\n");
498         if (ret)
499                 ERR_print_errors(out);
500         CRYPTO_cleanup_all_ex_data();
501         ERR_remove_thread_state(NULL);
502         ERR_free_strings();
503         CRYPTO_mem_leaks(out);
504         if (out != NULL)
505                 BIO_free(out);
506         return ret;
507         }       
508 #endif