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
  99 static const char rnd_seed[] = "string to make the random number generator "
 100         "think it has entropy";
 101
 102 /* declaration of the test functions */
 103 int x9_62_tests(BIO *);
 104 int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
 105 int test_builtin(BIO *);
 106
 107 /* functions to change the RAND_METHOD */
 108 int change_rand(void);
 109 int restore_rand(void);
 110 int fbytes(unsigned char *buf, int num);
 111
 112 RAND_METHOD     fake_rand;
 113 const RAND_METHOD *old_rand;
 114
 115 int change_rand(void)
 116         {
 117         /* save old rand method */
 118         if ((old_rand = RAND_get_rand_method()) == NULL)
 119                 return 0;
 120
 121         fake_rand.seed    = old_rand->seed;
 122         fake_rand.cleanup = old_rand->cleanup;
 123         fake_rand.add     = old_rand->add;
 124         fake_rand.status  = old_rand->status;
 125         /* use own random function */
 126         fake_rand.bytes      = fbytes;
 127         fake_rand.pseudorand = old_rand->bytes;
 128         /* set new RAND_METHOD */
 129         if (!RAND_set_rand_method(&fake_rand))
 130                 return 0;
 131         return 1;
 132         }
 133
 134 int restore_rand(void)
 135         {
 136         if (!RAND_set_rand_method(old_rand))
 137                 return 0;
 138         else
 139                 return 1;
 140         }
 141
 142 static int fbytes_counter = 0;
 143 static const char *numbers[8] = {
 144         "651056770906015076056810763456358567190100156695615665659",
 145         "6140507067065001063065065565667405560006161556565665656654",
 146         "8763001015071075675010661307616710783570106710677817767166"
 147         "71676178726717",
 148         "7000000175690566466555057817571571075705015757757057795755"
 149         "55657156756655",
 150         "1275552191113212300012030439187146164646146646466749494799",
 151         "1542725565216523985789236956265265265235675811949404040041",
 152         "1456427555219115346513212300075341203043918714616464614664"
 153         "64667494947990",
 154         "1712787255652165239672857892369562652652652356758119494040"
 155         "40041670216363"};
 156
 157 int fbytes(unsigned char *buf, int num)
 158         {
 159         int     ret;
 160         BIGNUM  *tmp = NULL;
 161
 162         if (fbytes_counter >= 8)
 163                 return 0;
 164         tmp = BN_new();
 165         if (!tmp)
 166                 return 0;
 167         if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
 168                 {
 169                 BN_free(tmp);
 170                 return 0;
 171                 }
 172         fbytes_counter ++;
 173         ret = BN_bn2bin(tmp, buf);
 174         if (ret == 0 || ret != num)
 175                 ret = 0;
 176         else
 177                 ret = 1;
 178         if (tmp)
 179                 BN_free(tmp);
 180         return ret;
 181         }
 182
 183 /* some tests from the X9.62 draft */
 184 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
 185         {
 186         int     ret = 0;
 187         const char message[] = "abc";
 188         unsigned char digest[20];
 189         unsigned int  dgst_len = 0;
 190         EVP_MD_CTX md_ctx;
 191         EC_KEY    *key = NULL;
 192         ECDSA_SIG *signature = NULL;
 193         BIGNUM    *r = NULL, *s = NULL;
 194
 195         EVP_MD_CTX_init(&md_ctx);
 196         /* get the message digest */
 197         EVP_DigestInit(&md_ctx, EVP_ecdsa());
 198         EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
 199         EVP_DigestFinal(&md_ctx, digest, &dgst_len);
 200
 201         BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
 202         /* create the key */
 203         if ((key = EC_KEY_new()) == NULL)
 204                 goto x962_int_err;
 205         if ((key->group = EC_GROUP_new_by_nid(nid)) == NULL)
 206                 goto x962_int_err;
 207         if (!EC_KEY_generate_key(key))
 208                 goto x962_int_err;
 209         BIO_printf(out, ".");
 210         BIO_flush(out);
 211         /* create the signature */
 212         signature = ECDSA_do_sign(digest, 20, key);
 213         if (signature == NULL)
 214                 goto x962_int_err;
 215         BIO_printf(out, ".");
 216         BIO_flush(out);
 217         /* compare the created signature with the expected signature */
 218         if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
 219                 goto x962_int_err;
 220         if (!BN_dec2bn(&r, r_in) ||
 221             !BN_dec2bn(&s, s_in))
 222                 goto x962_int_err;
 223         if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
 224                 goto x962_int_err;
 225         BIO_printf(out, ".");
 226         BIO_flush(out);
 227         /* verify the signature */
 228         if (ECDSA_do_verify(digest, 20, signature, key) != 1)
 229                 goto x962_int_err;
 230         BIO_printf(out, ".");
 231         BIO_flush(out);
 232
 233         BIO_printf(out, " ok\n");
 234         ret = 1;
 235 x962_int_err:
 236         if (!ret)
 237                 BIO_printf(out, " failed\n");
 238         if (key)
 239                 EC_KEY_free(key);
 240         if (signature)
 241                 ECDSA_SIG_free(signature);
 242         if (r)
 243                 BN_free(r);
 244         if (s)
 245                 BN_free(s);
 246         EVP_MD_CTX_cleanup(&md_ctx);
 247         return ret;
 248         }
 249
 250 int x9_62_tests(BIO *out)
 251         {
 252         int ret = 0;
 253
 254         BIO_printf(out, "some tests from X9.62:\n");
 255
 256         /* set own rand method */
 257         if (!change_rand())
 258                 goto x962_err;
 259
 260         if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
 261                 "3342403536405981729393488334694600415596881826869351677613",
 262                 "5735822328888155254683894997897571951568553642892029982342"))
 263                 goto x962_err;
 264         if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
 265                 "3086361431751678114926225473006680188549593787585317781474"
 266                 "62058306432176",
 267                 "3238135532097973577080787768312505059318910517550078427819"
 268                 "78505179448783"))
 269                 goto x962_err;
 270         if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
 271                 "87194383164871543355722284926904419997237591535066528048",
 272                 "308992691965804947361541664549085895292153777025772063598"))
 273                 goto x962_err;
 274         if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
 275                 "2159633321041961198501834003903461262881815148684178964245"
 276                 "5876922391552",
 277                 "1970303740007316867383349976549972270528498040721988191026"
 278                 "49413465737174"))
 279                 goto x962_err;
 280
 281         ret = 1;
 282 x962_err:
 283         if (!restore_rand())
 284                 ret = 0;
 285         return ret;
 286         }
 287
 288 int test_builtin(BIO *out)
 289         {
 290         EC_builtin_curve *curves = NULL;
 291         size_t          crv_len = 0, n = 0;
 292         EC_KEY          *eckey = NULL, *wrong_eckey = NULL;
 293         unsigned char   digest[20], wrong_digest[20];
 294         unsigned char   *signature = NULL;
 295         unsigned int    sig_len;
 296         int             nid, ret =  0;
 297
 298         /* fill digest values with some random data */
 299         if (!RAND_pseudo_bytes(digest, 20) ||
 300             !RAND_pseudo_bytes(wrong_digest, 20))
 301                 {
 302                 BIO_printf(out, "ERROR: unable to get random data\n");
 303                 goto builtin_err;
 304                 }
 305
 306         /* create and verify a ecdsa signature with every availble curve
 307          * (with ) */
 308         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
 309                 "with some internal curves:\n");
 310
 311         /* get a list of all internal curves */
 312         crv_len = EC_get_builtin_curves(NULL, 0);
 313
 314         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
 315
 316         if (curves == NULL)
 317                 {
 318                 BIO_printf(out, "malloc error\n");
 319                 goto builtin_err;
 320                 }
 321
 322         if (!EC_get_builtin_curves(curves, crv_len))
 323                 {
 324                 BIO_printf(out, "unable to get internal curves\n");
 325                 goto builtin_err;
 326                 }
 327
 328         /* now create and verify a signature for every curve */
 329         for (n = 0; n < crv_len; n++)
 330                 {
 331                 unsigned char dirt, offset;
 332
 333                 nid = curves[n].nid;
 334                 if (nid == NID_ipsec4)
 335                         continue;
 336                 /* create new ecdsa key (== EC_KEY) */
 337                 if ((eckey = EC_KEY_new()) == NULL)
 338                         goto builtin_err;
 339                 if ((eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 340                         goto builtin_err;
 341                 if (EC_GROUP_get_degree(eckey->group) < 160)
 342                         /* drop the curve */
 343                         {
 344                         EC_KEY_free(eckey);
 345                         eckey = NULL;
 346                         continue;
 347                         }
 348                 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
 349                 /* create key */
 350                 if (!EC_KEY_generate_key(eckey))
 351                         {
 352                         BIO_printf(out, " failed\n");
 353                         goto builtin_err;
 354                         }
 355                 /* create second key */
 356                 if ((wrong_eckey = EC_KEY_new()) == NULL)
 357                         goto builtin_err;
 358                 if ((wrong_eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 359                         goto builtin_err;
 360                 if (!EC_KEY_generate_key(wrong_eckey))
 361                         {
 362                         BIO_printf(out, " failed\n");
 363                         goto builtin_err;
 364                         }
 365
 366                 BIO_printf(out, ".");
 367                 BIO_flush(out);
 368                 /* check key */
 369                 if (!EC_KEY_check_key(eckey))
 370                         {
 371                         BIO_printf(out, " failed\n");
 372                         goto builtin_err;
 373                         }
 374                 BIO_printf(out, ".");
 375                 BIO_flush(out);
 376                 /* create signature */
 377                 sig_len = ECDSA_size(eckey);
 378                 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
 379                         goto builtin_err;
 380                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
 381                         {
 382                         BIO_printf(out, " failed\n");
 383                         goto builtin_err;
 384                         }
 385                 BIO_printf(out, ".");
 386                 BIO_flush(out);
 387                 /* verify signature */
 388                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
 389                         {
 390                         BIO_printf(out, " failed\n");
 391                         goto builtin_err;
 392                         }
 393                 BIO_printf(out, ".");
 394                 BIO_flush(out);
 395                 /* verify signature with the wrong key */
 396                 if (ECDSA_verify(0, digest, 20, signature, sig_len,
 397                         wrong_eckey) == 1)
 398                         {
 399                         BIO_printf(out, " failed\n");
 400                         goto builtin_err;
 401                         }
 402                 BIO_printf(out, ".");
 403                 BIO_flush(out);
 404                 /* wrong digest */
 405                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
 406                         eckey) == 1)
 407                         {
 408                         BIO_printf(out, " failed\n");
 409                         goto builtin_err;
 410                         }
 411                 BIO_printf(out, ".");
 412                 BIO_flush(out);
 413                 /* modify a single byte of the signature */
 414                 offset = signature[10] % sig_len;
 415                 dirt   = signature[11];
 416                 signature[offset] ^= dirt ? dirt : 1;
 417                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
 418                         {
 419                         BIO_printf(out, " failed\n");
 420                         goto builtin_err;
 421                         }
 422                 BIO_printf(out, ".");
 423                 BIO_flush(out);
 424
 425                 BIO_printf(out, " ok\n");
 426                 /* cleanup */
 427                 OPENSSL_free(signature);
 428                 signature = NULL;
 429                 EC_KEY_free(eckey);
 430                 eckey = NULL;
 431                 EC_KEY_free(wrong_eckey);
 432                 wrong_eckey = NULL;
 433                 }
 434
 435         ret = 1;
 436 builtin_err:
 437         if (eckey)
 438                 EC_KEY_free(eckey);
 439         if (wrong_eckey)
 440                 EC_KEY_free(wrong_eckey);
 441         if (signature);
 442                 OPENSSL_free(signature);
 443         if (curves)
 444                 OPENSSL_free(curves);
 445
 446         return ret;
 447         }
 448
 449 int main(void)
 450         {
 451         int     ret = 0;
 452         BIO     *out;
 453
 454         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 455
 456         /* enable memory leak checking unless explicitly disabled */
 457         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
 458                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
 459                 {
 460                 CRYPTO_malloc_debug_init();
 461                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
 462                 }
 463         else
 464                 {
 465                 /* OPENSSL_DEBUG_MEMORY=off */
 466                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
 467                 }
 468         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 469
 470         ERR_load_crypto_strings();
 471
 472         /* initialize the prng */
 473         RAND_seed(rnd_seed, sizeof(rnd_seed));
 474
 475         /* the tests */
 476         if (!x9_62_tests(out))  goto err;
 477         if (!test_builtin(out)) goto err;
 478
 479         ret = 1;
 480 err:
 481         if (!ret)
 482                 BIO_printf(out, "\nECDSA test failed\n");
 483         else
 484                 BIO_printf(out, "\nECDSA test passed\n");
 485         if (!ret)
 486                 ERR_print_errors(out);
 487         CRYPTO_cleanup_all_ex_data();
 488         ERR_remove_state(0);
 489         ERR_free_strings();
 490         CRYPTO_mem_leaks(out);
 491         if (out != NULL)
 492                 BIO_free(out);
 493         return(0);
 494         }
 495 #endif