fix typo
[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;
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 (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 */
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
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
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
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