44321c5ac6ca9c43d306935c026b4c34043035d7
[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) 2000-2002 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 /* 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
76 #endif
77
78 #include <stdio.h>
79 #include <stdlib.h>
80 #include <string.h>
81
82 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */
83
84 #ifdef OPENSSL_NO_ECDSA
85 int main(int argc, char * argv[])
86         {
87         puts("Elliptic curves are disabled.");
88         return 0;
89         }
90 #else
91
92 #include <openssl/crypto.h>
93 #include <openssl/bio.h>
94 #include <openssl/evp.h>
95 #include <openssl/ecdsa.h>
96 #include <openssl/engine.h>
97 #include <openssl/err.h>
98 #include <openssl/rand.h>
99
100 static const char rnd_seed[] = "string to make the random number generator "
101         "think it has entropy";
102
103 /* declaration of the test functions */
104 int x9_62_tests(BIO *);
105 int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
106 int test_builtin(BIO *);
107
108 /* functions to change the RAND_METHOD */
109 int change_rand(void);
110 int restore_rand(void);
111 int fbytes(unsigned char *buf, int num);
112
113 RAND_METHOD     fake_rand;
114 const RAND_METHOD *old_rand;
115
116 int change_rand(void)
117         {
118         /* save old rand method */
119         if ((old_rand = RAND_get_rand_method()) == NULL)
120                 return 0;
121
122         fake_rand.seed    = old_rand->seed;
123         fake_rand.cleanup = old_rand->cleanup;
124         fake_rand.add     = old_rand->add;
125         fake_rand.status  = old_rand->status;
126         /* use own random function */
127         fake_rand.bytes      = fbytes;
128         fake_rand.pseudorand = old_rand->bytes;
129         /* set new RAND_METHOD */
130         if (!RAND_set_rand_method(&fake_rand))
131                 return 0;
132         return 1;
133         }
134
135 int restore_rand(void)
136         {
137         if (!RAND_set_rand_method(old_rand))
138                 return 0;
139         else
140                 return 1;
141         }
142
143 static int fbytes_counter = 0;
144 static const char *numbers[8] = {
145         "651056770906015076056810763456358567190100156695615665659",
146         "6140507067065001063065065565667405560006161556565665656654",
147         "8763001015071075675010661307616710783570106710677817767166"
148         "71676178726717",
149         "7000000175690566466555057817571571075705015757757057795755"
150         "55657156756655",
151         "1275552191113212300012030439187146164646146646466749494799",
152         "1542725565216523985789236956265265265235675811949404040041",
153         "1456427555219115346513212300075341203043918714616464614664"
154         "64667494947990",
155         "1712787255652165239672857892369562652652652356758119494040"
156         "40041670216363"};
157
158 int fbytes(unsigned char *buf, int num)
159         {
160         int     ret;
161         BIGNUM  *tmp = NULL;
162
163         if (fbytes_counter >= 8)
164                 return 0;
165         tmp = BN_new();
166         if (!tmp)
167                 return 0;
168         if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
169                 {
170                 BN_free(tmp);
171                 return 0;
172                 }
173         fbytes_counter ++;
174         ret = BN_bn2bin(tmp, buf);      
175         if (ret == 0 || ret != num)
176                 ret = 0;
177         else
178                 ret = 1;
179         if (tmp)
180                 BN_free(tmp);
181         return ret;
182         }
183
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)
186         {
187         int     ret = 0;
188         const char message[] = "abc";
189         unsigned char digest[20];
190         unsigned int  dgst_len = 0;
191         EVP_MD_CTX md_ctx;
192         EC_KEY    *key = NULL;
193         ECDSA_SIG *signature = NULL;
194         BIGNUM    *r = NULL, *s = NULL;
195
196         EVP_MD_CTX_init(&md_ctx);
197         /* get the message digest */
198         EVP_DigestInit(&md_ctx, EVP_ecdsa());
199         EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
200         EVP_DigestFinal(&md_ctx, digest, &dgst_len);
201
202         BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
203         /* create the key */
204         if ((key = EC_KEY_new()) == NULL)
205                 goto x962_int_err;
206         if ((key->group = EC_GROUP_new_by_nid(nid)) == NULL)
207                 goto x962_int_err;
208         if (!EC_KEY_generate_key(key))
209                 goto x962_int_err;
210         BIO_printf(out, ".");
211         BIO_flush(out);
212         /* create the signature */
213         signature = ECDSA_do_sign(digest, 20, key);
214         if (signature == NULL)
215                 goto x962_int_err;
216         BIO_printf(out, ".");
217         BIO_flush(out);
218         /* compare the created signature with the expected signature */
219         if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
220                 goto x962_int_err;
221         if (!BN_dec2bn(&r, r_in) ||
222             !BN_dec2bn(&s, s_in))
223                 goto x962_int_err;
224         if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
225                 goto x962_int_err;
226         BIO_printf(out, ".");
227         BIO_flush(out);
228         /* verify the signature */
229         if (ECDSA_do_verify(digest, 20, signature, key) != 1)
230                 goto x962_int_err;
231         BIO_printf(out, ".");
232         BIO_flush(out);
233
234         BIO_printf(out, " ok\n");
235         ret = 1;
236 x962_int_err:
237         if (!ret)
238                 BIO_printf(out, " failed\n");
239         if (key)
240                 EC_KEY_free(key);
241         if (signature)
242                 ECDSA_SIG_free(signature);
243         if (r)
244                 BN_free(r);
245         if (s)
246                 BN_free(s);
247         EVP_MD_CTX_cleanup(&md_ctx);
248         return ret;
249         }
250
251 int x9_62_tests(BIO *out)
252         {
253         int ret = 0;
254
255         BIO_printf(out, "some tests from X9.62:\n");
256
257         /* set own rand method */
258         if (!change_rand())
259                 goto x962_err;
260
261         if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
262                 "3342403536405981729393488334694600415596881826869351677613",
263                 "5735822328888155254683894997897571951568553642892029982342"))
264                 goto x962_err;
265         if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
266                 "3086361431751678114926225473006680188549593787585317781474"
267                 "62058306432176",
268                 "3238135532097973577080787768312505059318910517550078427819"
269                 "78505179448783"))
270                 goto x962_err;
271         if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
272                 "87194383164871543355722284926904419997237591535066528048",
273                 "308992691965804947361541664549085895292153777025772063598"))
274                 goto x962_err;
275         if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
276                 "2159633321041961198501834003903461262881815148684178964245"
277                 "5876922391552",
278                 "1970303740007316867383349976549972270528498040721988191026"
279                 "49413465737174"))
280                 goto x962_err;
281
282         ret = 1;
283 x962_err:
284         if (!restore_rand())
285                 ret = 0;
286         return ret;
287         }
288
289 int test_builtin(BIO *out)
290         {
291         EC_builtin_curve *curves = NULL;
292         size_t          crv_len = 0, n = 0;
293         EC_KEY          *eckey = NULL, *wrong_eckey = NULL;
294         unsigned char   digest[20], wrong_digest[20];
295         unsigned char   *signature = NULL; 
296         unsigned int    sig_len;
297         int             nid, ret =  0;
298         
299         /* fill digest values with some random data */
300         if (!RAND_pseudo_bytes(digest, 20) ||
301             !RAND_pseudo_bytes(wrong_digest, 20))
302                 {
303                 BIO_printf(out, "ERROR: unable to get random data\n");
304                 goto builtin_err;
305                 }
306
307         /* create and verify a ecdsa signature with every availble curve
308          * (with ) */
309         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
310                 "with some internal curves:\n");
311
312         /* get a list of all internal curves */
313         crv_len = EC_get_builtin_curves(NULL, 0);
314
315         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
316
317         if (curves == NULL)
318                 {
319                 BIO_printf(out, "malloc error\n");
320                 goto builtin_err;
321                 }
322         
323         if (!EC_get_builtin_curves(curves, crv_len))
324                 {
325                 BIO_printf(out, "unable to get internal curves\n");
326                 goto builtin_err;
327                 }
328
329         /* now create and verify a signature for every curve */
330         for (n = 0; n < crv_len; n++)
331                 {
332                 unsigned char dirt, offset;
333
334                 nid = curves[n].nid;
335                 if (nid == NID_ipsec4)
336                         continue;
337                 /* create new ecdsa key (== EC_KEY) */
338                 if ((eckey = EC_KEY_new()) == NULL)
339                         goto builtin_err;
340                 if ((eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
341                         goto builtin_err;
342                 if (EC_GROUP_get_degree(eckey->group) < 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                 if ((wrong_eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
360                         goto builtin_err;
361                 if (!EC_KEY_generate_key(wrong_eckey))
362                         {
363                         BIO_printf(out, " failed\n");
364                         goto builtin_err;
365                         }
366
367                 BIO_printf(out, ".");
368                 BIO_flush(out);
369                 /* check key */
370                 if (!EC_KEY_check_key(eckey))
371                         {
372                         BIO_printf(out, " failed\n");
373                         goto builtin_err;
374                         }
375                 BIO_printf(out, ".");
376                 BIO_flush(out);
377                 /* create signature */
378                 sig_len = ECDSA_size(eckey);
379                 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
380                         goto builtin_err;
381                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
382                         {
383                         BIO_printf(out, " failed\n");
384                         goto builtin_err;
385                         }
386                 BIO_printf(out, ".");
387                 BIO_flush(out);
388                 /* verify signature */
389                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
390                         {
391                         BIO_printf(out, " failed\n");
392                         goto builtin_err;
393                         }
394                 BIO_printf(out, ".");
395                 BIO_flush(out);
396                 /* verify signature with the wrong key */
397                 if (ECDSA_verify(0, digest, 20, signature, sig_len, 
398                         wrong_eckey) == 1)
399                         {
400                         BIO_printf(out, " failed\n");
401                         goto builtin_err;
402                         }
403                 BIO_printf(out, ".");
404                 BIO_flush(out);
405                 /* wrong digest */
406                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
407                         eckey) == 1)
408                         {
409                         BIO_printf(out, " failed\n");
410                         goto builtin_err;
411                         }
412                 BIO_printf(out, ".");
413                 BIO_flush(out);
414                 /* modify a single byte of the signature */
415                 offset = signature[10] % sig_len;
416                 dirt   = signature[11];
417                 signature[offset] ^= dirt ? dirt : 1; 
418                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
419                         {
420                         BIO_printf(out, " failed\n");
421                         goto builtin_err;
422                         }
423                 BIO_printf(out, ".");
424                 BIO_flush(out);
425                 
426                 BIO_printf(out, " ok\n");
427                 /* cleanup */
428                 OPENSSL_free(signature);
429                 signature = NULL;
430                 EC_KEY_free(eckey);
431                 eckey = NULL;
432                 EC_KEY_free(wrong_eckey);
433                 wrong_eckey = NULL;
434                 }
435
436         ret = 1;        
437 builtin_err:
438         if (eckey)
439                 EC_KEY_free(eckey);
440         if (wrong_eckey)
441                 EC_KEY_free(wrong_eckey);
442         if (signature);
443                 OPENSSL_free(signature);
444         if (curves)
445                 OPENSSL_free(curves);
446
447         return ret;
448         }
449
450 int main(void)
451         {
452         int     ret = 1;
453         BIO     *out;
454
455         out = BIO_new_fp(stdout, BIO_NOCLOSE);
456         
457         /* enable memory leak checking unless explicitly disabled */
458         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && 
459                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
460                 {
461                 CRYPTO_malloc_debug_init();
462                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
463                 }
464         else
465                 {
466                 /* OPENSSL_DEBUG_MEMORY=off */
467                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
468                 }
469         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
470
471         ERR_load_crypto_strings();
472
473         /* initialize the prng */
474         RAND_seed(rnd_seed, sizeof(rnd_seed));
475
476         /* the tests */
477         if (!x9_62_tests(out))  goto err;
478         if (!test_builtin(out)) goto err;
479         
480         ret = 0;
481 err:    
482         if (ret)        
483                 BIO_printf(out, "\nECDSA test failed\n");
484         else 
485                 BIO_printf(out, "\nECDSA test passed\n");
486         if (ret)
487                 ERR_print_errors(out);
488         CRYPTO_cleanup_all_ex_data();
489         ERR_remove_state(0);
490         ERR_free_strings();
491         CRYPTO_mem_leaks(out);
492         if (out != NULL)
493                 BIO_free(out);
494         return ret;
495         }       
496 #endif