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 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75
  76 #ifdef OPENSSL_NO_ECDSA
  77 int main(int argc, char * argv[])
  78         {
  79         puts("Elliptic curves are disabled.");
  80         return 0;
  81         }
  82 #else
  83
  84 #include <openssl/crypto.h>
  85 #include <openssl/bio.h>
  86 #include <openssl/evp.h>
  87 #include <openssl/ecdsa.h>
  88 #include <openssl/engine.h>
  89 #include <openssl/err.h>
  90
  91 static const char rnd_seed[] = "string to make the random number generator "
  92         "think it has entropy";
  93
  94 /* declaration of the test functions */
  95 int x9_62_tests(BIO *);
  96 int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
  97 int test_builtin(BIO *);
  98
  99 /* functions to change the RAND_METHOD */
 100 int change_rand(void);
 101 int restore_rand(void);
 102 int fbytes(unsigned char *buf, int num);
 103
 104 RAND_METHOD     fake_rand;
 105 const RAND_METHOD *old_rand;
 106
 107 int change_rand(void)
 108         {
 109         /* save old rand method */
 110         if ((old_rand = RAND_get_rand_method()) == NULL)
 111                 return 0;
 112
 113         fake_rand.seed    = old_rand->seed;
 114         fake_rand.cleanup = old_rand->cleanup;
 115         fake_rand.add     = old_rand->add;
 116         fake_rand.status  = old_rand->status;
 117         /* use own random function */
 118         fake_rand.bytes      = fbytes;
 119         fake_rand.pseudorand = fbytes;
 120         /* set new RAND_METHOD */
 121         if (!RAND_set_rand_method(&fake_rand))
 122                 return 0;
 123         return 1;
 124         }
 125
 126 int restore_rand(void)
 127         {
 128         if (!RAND_set_rand_method(old_rand))
 129                 return 0;
 130         else
 131                 return 1;
 132         }
 133
 134 static int fbytes_counter = 0;
 135 static const char *numbers[8] = {
 136         "651056770906015076056810763456358567190100156695615665659",
 137         "6140507067065001063065065565667405560006161556565665656654",
 138         "8763001015071075675010661307616710783570106710677817767166"
 139         "71676178726717",
 140         "7000000175690566466555057817571571075705015757757057795755"
 141         "55657156756655",
 142         "1275552191113212300012030439187146164646146646466749494799",
 143         "1542725565216523985789236956265265265235675811949404040041",
 144         "1456427555219115346513212300075341203043918714616464614664"
 145         "64667494947990",
 146         "1712787255652165239672857892369562652652652356758119494040"
 147         "40041670216363"};
 148
 149 int fbytes(unsigned char *buf, int num)
 150         {
 151         int     ret;
 152         BIGNUM  *tmp = NULL;
 153
 154         if (fbytes_counter >= 8)
 155                 return 0;
 156         tmp = BN_new();
 157         if (!tmp)
 158                 return 0;
 159         if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
 160                 {
 161                 BN_free(tmp);
 162                 return 0;
 163                 }
 164         fbytes_counter ++;
 165         ret = BN_bn2bin(tmp, buf);
 166         if (ret == 0 || ret != num)
 167                 ret = 0;
 168         else
 169                 ret = 1;
 170         if (tmp)
 171                 BN_free(tmp);
 172         return ret;
 173         }
 174
 175 /* some tests from the X9.62 draft */
 176 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
 177         {
 178         int     ret = 0;
 179         const char message[] = "abc";
 180         unsigned char digest[20];
 181         unsigned int  dgst_len = 0;
 182         EVP_MD_CTX md_ctx;
 183         EC_KEY    *key = NULL;
 184         ECDSA_SIG *signature = NULL;
 185         BIGNUM    *r = NULL, *s = NULL;
 186
 187         EVP_MD_CTX_init(&md_ctx);
 188         /* get the message digest */
 189         EVP_DigestInit(&md_ctx, EVP_ecdsa());
 190         EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
 191         EVP_DigestFinal(&md_ctx, digest, &dgst_len);
 192
 193         BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
 194         /* create the key */
 195         if ((key = EC_KEY_new()) == NULL)
 196                 goto x962_int_err;
 197         if ((key->group = EC_GROUP_new_by_nid(nid)) == NULL)
 198                 goto x962_int_err;
 199         if (!EC_KEY_generate_key(key))
 200                 goto x962_int_err;
 201         BIO_printf(out, ".");
 202         BIO_flush(out);
 203         /* create the signature */
 204         signature = ECDSA_do_sign(digest, 20, key);
 205         if (signature == NULL)
 206                 goto x962_int_err;
 207         BIO_printf(out, ".");
 208         BIO_flush(out);
 209         /* compare the created signature with the expected signature */
 210         if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
 211                 goto x962_int_err;
 212         if (!BN_dec2bn(&r, r_in) ||
 213             !BN_dec2bn(&s, s_in))
 214                 goto x962_int_err;
 215         if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
 216                 goto x962_int_err;
 217         BIO_printf(out, ".");
 218         BIO_flush(out);
 219         /* verify the signature */
 220         if (ECDSA_do_verify(digest, 20, signature, key) != 1)
 221                 goto x962_int_err;
 222         BIO_printf(out, ".");
 223         BIO_flush(out);
 224
 225         BIO_printf(out, " ok\n");
 226         ret = 1;
 227 x962_int_err:
 228         if (!ret)
 229                 BIO_printf(out, " failed\n");
 230         if (key)
 231                 EC_KEY_free(key);
 232         if (signature)
 233                 ECDSA_SIG_free(signature);
 234         if (r)
 235                 BN_free(r);
 236         if (s)
 237                 BN_free(s);
 238         EVP_MD_CTX_cleanup(&md_ctx);
 239         return ret;
 240         }
 241
 242 int x9_62_tests(BIO *out)
 243         {
 244         int ret = 0;
 245
 246         BIO_printf(out, "some tests from X9.62:\n");
 247
 248         /* set own rand method */
 249         if (!change_rand())
 250                 goto x962_err;
 251
 252         if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
 253                 "3342403536405981729393488334694600415596881826869351677613",
 254                 "5735822328888155254683894997897571951568553642892029982342"))
 255                 goto x962_err;
 256         if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
 257                 "3086361431751678114926225473006680188549593787585317781474"
 258                 "62058306432176",
 259                 "3238135532097973577080787768312505059318910517550078427819"
 260                 "78505179448783"))
 261                 goto x962_err;
 262         if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
 263                 "87194383164871543355722284926904419997237591535066528048",
 264                 "308992691965804947361541664549085895292153777025772063598"))
 265                 goto x962_err;
 266         if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
 267                 "2159633321041961198501834003903461262881815148684178964245"
 268                 "5876922391552",
 269                 "1970303740007316867383349976549972270528498040721988191026"
 270                 "49413465737174"))
 271                 goto x962_err;
 272
 273         ret = 1;
 274 x962_err:
 275         if (!restore_rand())
 276                 ret = 0;
 277         return ret;
 278         }
 279
 280 int test_builtin(BIO *out)
 281         {
 282         EC_builtin_curve *curves = NULL;
 283         size_t          crv_len = 0, n = 0;
 284         EC_KEY          *eckey = NULL, *wrong_eckey = NULL;
 285         unsigned char   digest[20], wrong_digest[20];
 286         unsigned char   *signature;
 287         unsigned int    sig_len;
 288         int             nid, ret =  0;
 289
 290         /* fill digest values with some random data */
 291         if (!RAND_pseudo_bytes(digest, 20) ||
 292             !RAND_pseudo_bytes(wrong_digest, 20))
 293                 {
 294                 BIO_printf(out, "ERROR: unable to get random data\n");
 295                 goto builtin_err;
 296                 }
 297
 298         /* create and verify a ecdsa signature with every availble curve
 299          * (with ) */
 300         BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
 301                 "with some internal curves:\n");
 302
 303         /* get a list of all internal curves */
 304         crv_len = EC_get_builtin_curves(NULL, 0);
 305
 306         curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
 307
 308         if (curves == NULL)
 309                 {
 310                 BIO_printf(out, "malloc error\n");
 311                 goto builtin_err;
 312                 }
 313
 314         if (!EC_get_builtin_curves(curves, crv_len))
 315                 {
 316                 BIO_printf(out, "unable to get internal curves\n");
 317                 goto builtin_err;
 318                 }
 319
 320         /* now create and verify a signature for every curve */
 321         for (n = 0; n < crv_len; n++)
 322                 {
 323                 nid = curves[n].nid;
 324                 /* create new ecdsa key (== EC_KEY) */
 325                 if ((eckey = EC_KEY_new()) == NULL)
 326                         goto builtin_err;
 327                 if ((eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 328                         goto builtin_err;
 329                 if (EC_GROUP_get_degree(eckey->group) < 160)
 330                         /* drop the curve */
 331                         {
 332                         EC_KEY_free(eckey);
 333                         eckey = NULL;
 334                         continue;
 335                         }
 336                 BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
 337                 /* create key */
 338                 if (!EC_KEY_generate_key(eckey))
 339                         {
 340                         BIO_printf(out, " failed\n");
 341                         goto builtin_err;
 342                         }
 343                 /* create second key */
 344                 if ((wrong_eckey = EC_KEY_new()) == NULL)
 345                         goto builtin_err;
 346                 if ((wrong_eckey->group = EC_GROUP_new_by_nid(nid)) == NULL)
 347                         goto builtin_err;
 348                 if (!EC_KEY_generate_key(wrong_eckey))
 349                         {
 350                         BIO_printf(out, " failed\n");
 351                         goto builtin_err;
 352                         }
 353
 354                 BIO_printf(out, ".");
 355                 BIO_flush(out);
 356                 /* check key */
 357                 if (!EC_KEY_check_key(eckey))
 358                         {
 359                         BIO_printf(out, " failed\n");
 360                         goto builtin_err;
 361                         }
 362                 BIO_printf(out, ".");
 363                 BIO_flush(out);
 364                 /* create signature */
 365                 sig_len = ECDSA_size(eckey);
 366                 if ((signature = OPENSSL_malloc(sig_len)) == NULL)
 367                         goto builtin_err;
 368                 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
 369                         {
 370                         BIO_printf(out, " failed\n");
 371                         goto builtin_err;
 372                         }
 373                 BIO_printf(out, ".");
 374                 BIO_flush(out);
 375                 /* verify signature */
 376                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
 377                         {
 378                         BIO_printf(out, " failed\n");
 379                         goto builtin_err;
 380                         }
 381                 BIO_printf(out, ".");
 382                 BIO_flush(out);
 383                 /* verify signature with the wrong key */
 384                 if (ECDSA_verify(0, digest, 20, signature, sig_len,
 385                         wrong_eckey) == 1)
 386                         {
 387                         BIO_printf(out, " failed\n");
 388                         goto builtin_err;
 389                         }
 390                 BIO_printf(out, ".");
 391                 BIO_flush(out);
 392                 /* wrong digest */
 393                 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
 394                         eckey) == 1)
 395                         {
 396                         BIO_printf(out, " failed\n");
 397                         goto builtin_err;
 398                         }
 399                 BIO_printf(out, ".");
 400                 BIO_flush(out);
 401                 /* modify signature */
 402                 signature[((int)signature[0])%sig_len] ^=
 403                         signature[((int)signature[1])%sig_len];
 404                 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
 405                         {
 406                         BIO_printf(out, " failed\n");
 407                         goto builtin_err;
 408                         }
 409                 BIO_printf(out, ".");
 410                 BIO_flush(out);
 411
 412                 BIO_printf(out, " ok\n");
 413                 /* cleanup */
 414                 OPENSSL_free(signature);
 415                 signature = NULL;
 416                 EC_KEY_free(eckey);
 417                 eckey = NULL;
 418                 EC_KEY_free(wrong_eckey);
 419                 wrong_eckey = NULL;
 420                 }
 421
 422         ret = 1;
 423 builtin_err:
 424         if (eckey)
 425                 EC_KEY_free(eckey);
 426         if (wrong_eckey)
 427                 EC_KEY_free(wrong_eckey);
 428         if (signature);
 429                 OPENSSL_free(signature);
 430         if (curves)
 431                 OPENSSL_free(curves);
 432
 433         return ret;
 434         }
 435
 436 int main(void)
 437         {
 438         int     ret = 0;
 439         BIO     *out;
 440
 441         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 442
 443         /* enable memory leak checking unless explicitly disabled */
 444         if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
 445                 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
 446                 {
 447                 CRYPTO_malloc_debug_init();
 448                 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
 449                 }
 450         else
 451                 {
 452                 /* OPENSSL_DEBUG_MEMORY=off */
 453                 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
 454                 }
 455         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 456
 457         ERR_load_crypto_strings();
 458
 459         /* initialize the prng */
 460         RAND_seed(rnd_seed, sizeof(rnd_seed));
 461
 462         /* the tests */
 463         if (!x9_62_tests(out))  goto err;
 464         if (!test_builtin(out)) goto err;
 465
 466         ret = 1;
 467 err:
 468         if (!ret)
 469                 BIO_printf(out, "\nECDSA test failed\n");
 470         else
 471                 BIO_printf(out, "\nECDSA test passed\n");
 472         if (!ret)
 473                 ERR_print_errors(out);
 474         CRYPTO_cleanup_all_ex_data();
 475         ERR_remove_state(0);
 476         ERR_free_strings();
 477         CRYPTO_mem_leaks(out);
 478         if (out != NULL)
 479                 BIO_free(out);
 480         return(0);
 481         }
 482 #endif