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 #ifdef OPENSSL_NO_ECDSA
  83 int main(int argc, char * argv[])
  84         {
  85         puts("Elliptic curves are disabled.");
  86         return 0;
  87         }
  88 #else
  89
  90 #include <openssl/crypto.h>
  91 #include <openssl/bio.h>
  92 #include <openssl/evp.h>
  93 #include <openssl/ecdsa.h>
  94 #include <openssl/engine.h>
  95 #include <openssl/err.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 = fbytes;
 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()) == NULL)
 202                 goto x962_int_err;
 203         if ((key->group = EC_GROUP_new_by_nid(nid)) == NULL)
 204                 goto x962_int_err;
 205         if (!EC_KEY_generate_key(key))
 206                 goto x962_int_err;
 207         BIO_printf(out, ".");
 208         BIO_flush(out);
 209         /* create the signature */
 210         signature = ECDSA_do_sign(digest, 20, key);
 211         if (signature == NULL)
 212                 goto x962_int_err;
 213         BIO_printf(out, ".");
 214         BIO_flush(out);
 215         /* compare the created signature with the expected signature */
 216         if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
 217                 goto x962_int_err;
 218         if (!BN_dec2bn(&r, r_in) ||
 219             !BN_dec2bn(&s, s_in))
 220                 goto x962_int_err;
 221         if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
 222                 goto x962_int_err;
 223         BIO_printf(out, ".");
 224         BIO_flush(out);
 225         /* verify the signature */
 226         if (ECDSA_do_verify(digest, 20, signature, key) != 1)
 227                 goto x962_int_err;
 228         BIO_printf(out, ".");
 229         BIO_flush(out);
 230
 231         BIO_printf(out, " ok\n");
 232         ret = 1;
 233 x962_int_err:
 234         if (!ret)
 235                 BIO_printf(out, " failed\n");
 236         if (key)
 237                 EC_KEY_free(key);
 238         if (signature)
 239                 ECDSA_SIG_free(signature);
 240         if (r)
 241                 BN_free(r);
 242         if (s)
 243                 BN_free(s);
 244         EVP_MD_CTX_cleanup(&md_ctx);
 245         return ret;
 246         }
 247
 248 int x9_62_tests(BIO *out)
 249         {
 250         int ret = 0;
 251
 252         BIO_printf(out, "some tests from X9.62:\n");
 253
 254         /* set own rand method */
 255         if (!change_rand())
 256                 goto x962_err;
 257
 258         if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
 259                 "3342403536405981729393488334694600415596881826869351677613",
 260                 "5735822328888155254683894997897571951568553642892029982342"))
 261                 goto x962_err;
 262         if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
 263                 "3086361431751678114926225473006680188549593787585317781474"
 264                 "62058306432176",
 265                 "3238135532097973577080787768312505059318910517550078427819"
 266                 "78505179448783"))
 267                 goto x962_err;
 268         if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
 269                 "87194383164871543355722284926904419997237591535066528048",
 270                 "308992691965804947361541664549085895292153777025772063598"))
 271                 goto x962_err;
 272         if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
 273                 "2159633321041961198501834003903461262881815148684178964245"
 274                 "5876922391552",
 275                 "1970303740007316867383349976549972270528498040721988191026"
 276                 "49413465737174"))
 277                 goto x962_err;
 278
 279         ret = 1;
 280 x962_err:
 281         if (!restore_rand())
 282                 ret = 0;
 283         return ret;
 284         }
 285
 286 int test_builtin(BIO *out)
 287         {
 288         EC_builtin_curve *curves = NULL;
 289         size_t          crv_len = 0, n = 0;
 290         EC_KEY          *eckey = NULL, *wrong_eckey = NULL;
 291         unsigned char   digest[20], wrong_digest[20];
 292         unsigned char   *signature = NULL;
 293         unsigned int    sig_len;
 294         int             nid, ret =  0;
 295
 296         /* fill digest values with some random data */
 297         if (!RAND_pseudo_bytes(digest, 20) ||
 298             !RAND_pseudo_bytes(wrong_digest, 20))
 299                 {
 300                 BIO_printf(out, "ERROR: unable to get random data\n");
 301                 goto builtin_err;
 302                 }
 303
 304         /* create and verify a ecdsa signature with every availble curve
 305          * (with ) */
 306         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
 307                 "with some internal curves:\n");
 308
 309         /* get a list of all internal curves */
 310         crv_len = EC_get_builtin_curves(NULL, 0);
 311
 312         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
 313
 314         if (curves == NULL)
 315                 {
 316                 BIO_printf(out, "malloc error\n");
 317                 goto builtin_err;
 318                 }
 319
 320         if (!EC_get_builtin_curves(curves, crv_len))
 321                 {
 322                 BIO_printf(out, "unable to get internal curves\n");
 323                 goto builtin_err;
 324                 }
 325
 326         /* now create and verify a signature for every curve */
 327         for (n = 0; n < crv_len; n++)
 328                 {
 329                 nid = curves[n].nid;
 330                 /* create new ecdsa key (== EC_KEY) */
 331                 if ((eckey = EC_KEY_new()) == NULL)
 332                         goto builtin_err;
 333                 if ((eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 334                         goto builtin_err;
 335                 if (EC_GROUP_get_degree(eckey->group) < 160)
 336                         /* drop the curve */
 337                         {
 338                         EC_KEY_free(eckey);
 339                         eckey = NULL;
 340                         continue;
 341                         }
 342                 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
 343                 /* create key */
 344                 if (!EC_KEY_generate_key(eckey))
 345                         {
 346                         BIO_printf(out, " failed\n");
 347                         goto builtin_err;
 348                         }
 349                 /* create second key */
 350                 if ((wrong_eckey = EC_KEY_new()) == NULL)
 351                         goto builtin_err;
 352                 if ((wrong_eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 353                         goto builtin_err;
 354                 if (!EC_KEY_generate_key(wrong_eckey))
 355                         {
 356                         BIO_printf(out, " failed\n");
 357                         goto builtin_err;
 358                         }
 359
 360                 BIO_printf(out, ".");
 361                 BIO_flush(out);
 362                 /* check key */
 363                 if (!EC_KEY_check_key(eckey))
 364                         {
 365                         BIO_printf(out, " failed\n");
 366                         goto builtin_err;
 367                         }
 368                 BIO_printf(out, ".");
 369                 BIO_flush(out);
 370                 /* create signature */
 371                 sig_len = ECDSA_size(eckey);
 372                 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
 373                         goto builtin_err;
 374                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
 375                         {
 376                         BIO_printf(out, " failed\n");
 377                         goto builtin_err;
 378                         }
 379                 BIO_printf(out, ".");
 380                 BIO_flush(out);
 381                 /* verify signature */
 382                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
 383                         {
 384                         BIO_printf(out, " failed\n");
 385                         goto builtin_err;
 386                         }
 387                 BIO_printf(out, ".");
 388                 BIO_flush(out);
 389                 /* verify signature with the wrong key */
 390                 if (ECDSA_verify(0, digest, 20, signature, sig_len,
 391                         wrong_eckey) == 1)
 392                         {
 393                         BIO_printf(out, " failed\n");
 394                         goto builtin_err;
 395                         }
 396                 BIO_printf(out, ".");
 397                 BIO_flush(out);
 398                 /* wrong digest */
 399                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
 400                         eckey) == 1)
 401                         {
 402                         BIO_printf(out, " failed\n");
 403                         goto builtin_err;
 404                         }
 405                 BIO_printf(out, ".");
 406                 BIO_flush(out);
 407                 /* modify signature */
 408                 signature[((int)signature[0])%sig_len] ^=
 409                         signature[((int)signature[1])%sig_len];
 410                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
 411                         {
 412                         BIO_printf(out, " failed\n");
 413                         goto builtin_err;
 414                         }
 415                 BIO_printf(out, ".");
 416                 BIO_flush(out);
 417
 418                 BIO_printf(out, " ok\n");
 419                 /* cleanup */
 420                 OPENSSL_free(signature);
 421                 signature = NULL;
 422                 EC_KEY_free(eckey);
 423                 eckey = NULL;
 424                 EC_KEY_free(wrong_eckey);
 425                 wrong_eckey = NULL;
 426                 }
 427
 428         ret = 1;
 429 builtin_err:
 430         if (eckey)
 431                 EC_KEY_free(eckey);
 432         if (wrong_eckey)
 433                 EC_KEY_free(wrong_eckey);
 434         if (signature);
 435                 OPENSSL_free(signature);
 436         if (curves)
 437                 OPENSSL_free(curves);
 438
 439         return ret;
 440         }
 441
 442 int main(void)
 443         {
 444         int     ret = 0;
 445         BIO     *out;
 446
 447         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 448
 449         /* enable memory leak checking unless explicitly disabled */
 450         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
 451                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
 452                 {
 453                 CRYPTO_malloc_debug_init();
 454                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
 455                 }
 456         else
 457                 {
 458                 /* OPENSSL_DEBUG_MEMORY=off */
 459                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
 460                 }
 461         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 462
 463         ERR_load_crypto_strings();
 464
 465         /* initialize the prng */
 466         RAND_seed(rnd_seed, sizeof(rnd_seed));
 467
 468         /* the tests */
 469         if (!x9_62_tests(out))  goto err;
 470         if (!test_builtin(out)) goto err;
 471
 472         ret = 1;
 473 err:
 474         if (!ret)
 475                 BIO_printf(out, "\nECDSA test failed\n");
 476         else
 477                 BIO_printf(out, "\nECDSA test passed\n");
 478         if (!ret)
 479                 ERR_print_errors(out);
 480         CRYPTO_cleanup_all_ex_data();
 481         ERR_remove_state(0);
 482         ERR_free_strings();
 483         CRYPTO_mem_leaks(out);
 484         if (out != NULL)
 485                 BIO_free(out);
 486         return(0);
 487         }
 488 #endif