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 /* 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 #ifndef OPENSSL_NO_ENGINE
  97 #include <openssl/engine.h>
  98 #endif
  99 #include <openssl/err.h>
 100 #include <openssl/rand.h>
 101
 102 static const char rnd_seed[] = "string to make the random number generator "
 103         "think it has entropy";
 104
 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 *);
 109
 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);
 114
 115 RAND_METHOD     fake_rand;
 116 const RAND_METHOD *old_rand;
 117
 118 int change_rand(void)
 119         {
 120         /* save old rand method */
 121         if ((old_rand = RAND_get_rand_method()) == NULL)
 122                 return 0;
 123
 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))
 133                 return 0;
 134         return 1;
 135         }
 136
 137 int restore_rand(void)
 138         {
 139         if (!RAND_set_rand_method(old_rand))
 140                 return 0;
 141         else
 142                 return 1;
 143         }
 144
 145 static int fbytes_counter = 0;
 146 static const char *numbers[8] = {
 147         "651056770906015076056810763456358567190100156695615665659",
 148         "6140507067065001063065065565667405560006161556565665656654",
 149         "8763001015071075675010661307616710783570106710677817767166"
 150         "71676178726717",
 151         "7000000175690566466555057817571571075705015757757057795755"
 152         "55657156756655",
 153         "1275552191113212300012030439187146164646146646466749494799",
 154         "1542725565216523985789236956265265265235675811949404040041",
 155         "1456427555219115346513212300075341203043918714616464614664"
 156         "64667494947990",
 157         "1712787255652165239672857892369562652652652356758119494040"
 158         "40041670216363"};
 159
 160 int fbytes(unsigned char *buf, int num)
 161         {
 162         int     ret;
 163         BIGNUM  *tmp = NULL;
 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         ret = BN_bn2bin(tmp, buf);
 177         if (ret == 0 || ret != num)
 178                 ret = 0;
 179         else
 180                 ret = 1;
 181         if (tmp)
 182                 BN_free(tmp);
 183         return ret;
 184         }
 185
 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)
 188         {
 189         int     ret = 0;
 190         const char message[] = "abc";
 191         unsigned char digest[20];
 192         unsigned int  dgst_len = 0;
 193         EVP_MD_CTX md_ctx;
 194         EC_KEY    *key = NULL;
 195         ECDSA_SIG *signature = NULL;
 196         BIGNUM    *r = NULL, *s = NULL;
 197
 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);
 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         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         EC_GROUP        *group;
 295         unsigned char   digest[20], wrong_digest[20];
 296         unsigned char   *signature = NULL;
 297         unsigned int    sig_len;
 298         int             nid, ret =  0;
 299
 300         /* fill digest values with some random data */
 301         if (!RAND_pseudo_bytes(digest, 20) ||
 302             !RAND_pseudo_bytes(wrong_digest, 20))
 303                 {
 304                 BIO_printf(out, "ERROR: unable to get random data\n");
 305                 goto builtin_err;
 306                 }
 307
 308         /* create and verify a ecdsa signature with every availble curve
 309          * (with ) */
 310         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
 311                 "with some internal curves:\n");
 312
 313         /* get a list of all internal curves */
 314         crv_len = EC_get_builtin_curves(NULL, 0);
 315
 316         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
 317
 318         if (curves == NULL)
 319                 {
 320                 BIO_printf(out, "malloc error\n");
 321                 goto builtin_err;
 322                 }
 323
 324         if (!EC_get_builtin_curves(curves, crv_len))
 325                 {
 326                 BIO_printf(out, "unable to get internal curves\n");
 327                 goto builtin_err;
 328                 }
 329
 330         /* now create and verify a signature for every curve */
 331         for (n = 0; n < crv_len; n++)
 332                 {
 333                 unsigned char dirt, offset;
 334
 335                 nid = curves[n].nid;
 336                 if (nid == NID_ipsec4)
 337                         continue;
 338                 /* create new ecdsa key (== EC_KEY) */
 339                 if ((eckey = EC_KEY_new()) == NULL)
 340                         goto builtin_err;
 341                 group = EC_GROUP_new_by_curve_name(nid);
 342                 if (group == NULL)
 343                         goto builtin_err;
 344                 if (EC_KEY_set_group(eckey, group) == 0)
 345                         goto builtin_err;
 346                 EC_GROUP_free(group);
 347                 if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160)
 348                         /* drop the curve */
 349                         {
 350                         EC_KEY_free(eckey);
 351                         eckey = NULL;
 352                         continue;
 353                         }
 354                 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
 355                 /* create key */
 356                 if (!EC_KEY_generate_key(eckey))
 357                         {
 358                         BIO_printf(out, " failed\n");
 359                         goto builtin_err;
 360                         }
 361                 /* create second key */
 362                 if ((wrong_eckey = EC_KEY_new()) == NULL)
 363                         goto builtin_err;
 364                 group = EC_GROUP_new_by_curve_name(nid);
 365                 if (group == NULL)
 366                         goto builtin_err;
 367                 if (EC_KEY_set_group(wrong_eckey, group) == 0)
 368                         goto builtin_err;
 369                 EC_GROUP_free(group);
 370                 if (!EC_KEY_generate_key(wrong_eckey))
 371                         {
 372                         BIO_printf(out, " failed\n");
 373                         goto builtin_err;
 374                         }
 375
 376                 BIO_printf(out, ".");
 377                 BIO_flush(out);
 378                 /* check key */
 379                 if (!EC_KEY_check_key(eckey))
 380                         {
 381                         BIO_printf(out, " failed\n");
 382                         goto builtin_err;
 383                         }
 384                 BIO_printf(out, ".");
 385                 BIO_flush(out);
 386                 /* create signature */
 387                 sig_len = ECDSA_size(eckey);
 388                 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
 389                         goto builtin_err;
 390                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
 391                         {
 392                         BIO_printf(out, " failed\n");
 393                         goto builtin_err;
 394                         }
 395                 BIO_printf(out, ".");
 396                 BIO_flush(out);
 397                 /* verify signature */
 398                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
 399                         {
 400                         BIO_printf(out, " failed\n");
 401                         goto builtin_err;
 402                         }
 403                 BIO_printf(out, ".");
 404                 BIO_flush(out);
 405                 /* verify signature with the wrong key */
 406                 if (ECDSA_verify(0, digest, 20, signature, sig_len,
 407                         wrong_eckey) == 1)
 408                         {
 409                         BIO_printf(out, " failed\n");
 410                         goto builtin_err;
 411                         }
 412                 BIO_printf(out, ".");
 413                 BIO_flush(out);
 414                 /* wrong digest */
 415                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
 416                         eckey) == 1)
 417                         {
 418                         BIO_printf(out, " failed\n");
 419                         goto builtin_err;
 420                         }
 421                 BIO_printf(out, ".");
 422                 BIO_flush(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)
 428                         {
 429                         BIO_printf(out, " failed\n");
 430                         goto builtin_err;
 431                         }
 432                 BIO_printf(out, ".");
 433                 BIO_flush(out);
 434
 435                 BIO_printf(out, " ok\n");
 436                 /* cleanup */
 437                 OPENSSL_free(signature);
 438                 signature = NULL;
 439                 EC_KEY_free(eckey);
 440                 eckey = NULL;
 441                 EC_KEY_free(wrong_eckey);
 442                 wrong_eckey = NULL;
 443                 }
 444
 445         ret = 1;
 446 builtin_err:
 447         if (eckey)
 448                 EC_KEY_free(eckey);
 449         if (wrong_eckey)
 450                 EC_KEY_free(wrong_eckey);
 451         if (signature);
 452                 OPENSSL_free(signature);
 453         if (curves)
 454                 OPENSSL_free(curves);
 455
 456         return ret;
 457         }
 458
 459 int main(void)
 460         {
 461         int     ret = 1;
 462         BIO     *out;
 463
 464         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 465
 466         /* enable memory leak checking unless explicitly disabled */
 467         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
 468                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
 469                 {
 470                 CRYPTO_malloc_debug_init();
 471                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
 472                 }
 473         else
 474                 {
 475                 /* OPENSSL_DEBUG_MEMORY=off */
 476                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
 477                 }
 478         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 479
 480         ERR_load_crypto_strings();
 481
 482         /* initialize the prng */
 483         RAND_seed(rnd_seed, sizeof(rnd_seed));
 484
 485         /* the tests */
 486         if (!x9_62_tests(out))  goto err;
 487         if (!test_builtin(out)) goto err;
 488
 489         ret = 0;
 490 err:
 491         if (ret)
 492                 BIO_printf(out, "\nECDSA test failed\n");
 493         else
 494                 BIO_printf(out, "\nECDSA test passed\n");
 495         if (ret)
 496                 ERR_print_errors(out);
 497         CRYPTO_cleanup_all_ex_data();
 498         ERR_remove_state(0);
 499         ERR_free_strings();
 500         CRYPTO_mem_leaks(out);
 501         if (out != NULL)
 502                 BIO_free(out);
 503         return ret;
 504         }
 505 #endif