release/src/router/openssl/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 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75
  76 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */
  77
  78 #ifdef OPENSSL_NO_ECDSA
  79 int main(int argc, char *argv[])
  80 {
  81     puts("Elliptic curves are disabled.");
  82     return 0;
  83 }
  84 #else
  85
  86 # include <openssl/crypto.h>
  87 # include <openssl/bio.h>
  88 # include <openssl/evp.h>
  89 # include <openssl/bn.h>
  90 # include <openssl/ecdsa.h>
  91 # ifndef OPENSSL_NO_ENGINE
  92 #  include <openssl/engine.h>
  93 # endif
  94 # include <openssl/err.h>
  95 # include <openssl/rand.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 = old_rand->bytes;
 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
 156 int fbytes(unsigned char *buf, int num)
 157 {
 158     int ret;
 159     BIGNUM *tmp = NULL;
 160
 161     if (fbytes_counter >= 8)
 162         return 0;
 163     tmp = BN_new();
 164     if (!tmp)
 165         return 0;
 166     if (!BN_dec2bn(&tmp, numbers[fbytes_counter])) {
 167         BN_free(tmp);
 168         return 0;
 169     }
 170     fbytes_counter++;
 171     if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf))
 172         ret = 0;
 173     else
 174         ret = 1;
 175     if (tmp)
 176         BN_free(tmp);
 177     return ret;
 178 }
 179
 180 /* some tests from the X9.62 draft */
 181 int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
 182 {
 183     int ret = 0;
 184     const char message[] = "abc";
 185     unsigned char digest[20];
 186     unsigned int dgst_len = 0;
 187     EVP_MD_CTX md_ctx;
 188     EC_KEY *key = NULL;
 189     ECDSA_SIG *signature = NULL;
 190     BIGNUM *r = NULL, *s = NULL;
 191
 192     EVP_MD_CTX_init(&md_ctx);
 193     /* get the message digest */
 194     EVP_DigestInit(&md_ctx, EVP_ecdsa());
 195     EVP_DigestUpdate(&md_ctx, (const void *)message, 3);
 196     EVP_DigestFinal(&md_ctx, digest, &dgst_len);
 197
 198     BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
 199     /* create the key */
 200     if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
 201         goto x962_int_err;
 202     if (!EC_KEY_generate_key(key))
 203         goto x962_int_err;
 204     BIO_printf(out, ".");
 205     (void)BIO_flush(out);
 206     /* create the signature */
 207     signature = ECDSA_do_sign(digest, 20, key);
 208     if (signature == NULL)
 209         goto x962_int_err;
 210     BIO_printf(out, ".");
 211     (void)BIO_flush(out);
 212     /* compare the created signature with the expected signature */
 213     if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
 214         goto x962_int_err;
 215     if (!BN_dec2bn(&r, r_in) || !BN_dec2bn(&s, s_in))
 216         goto x962_int_err;
 217     if (BN_cmp(signature->r, r) || BN_cmp(signature->s, s))
 218         goto x962_int_err;
 219     BIO_printf(out, ".");
 220     (void)BIO_flush(out);
 221     /* verify the signature */
 222     if (ECDSA_do_verify(digest, 20, signature, key) != 1)
 223         goto x962_int_err;
 224     BIO_printf(out, ".");
 225     (void)BIO_flush(out);
 226
 227     BIO_printf(out, " ok\n");
 228     ret = 1;
 229  x962_int_err:
 230     if (!ret)
 231         BIO_printf(out, " failed\n");
 232     if (key)
 233         EC_KEY_free(key);
 234     if (signature)
 235         ECDSA_SIG_free(signature);
 236     if (r)
 237         BN_free(r);
 238     if (s)
 239         BN_free(s);
 240     EVP_MD_CTX_cleanup(&md_ctx);
 241     return ret;
 242 }
 243
 244 int x9_62_tests(BIO *out)
 245 {
 246     int ret = 0;
 247
 248     BIO_printf(out, "some tests from X9.62:\n");
 249
 250     /* set own rand method */
 251     if (!change_rand())
 252         goto x962_err;
 253
 254     if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
 255                              "3342403536405981729393488334694600415596881826869351677613",
 256                              "5735822328888155254683894997897571951568553642892029982342"))
 257         goto x962_err;
 258     if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
 259                              "3086361431751678114926225473006680188549593787585317781474"
 260                              "62058306432176",
 261                              "3238135532097973577080787768312505059318910517550078427819"
 262                              "78505179448783"))
 263         goto x962_err;
 264 # ifndef OPENSSL_NO_EC2M
 265     if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
 266                              "87194383164871543355722284926904419997237591535066528048",
 267                              "308992691965804947361541664549085895292153777025772063598"))
 268         goto x962_err;
 269     if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
 270                              "2159633321041961198501834003903461262881815148684178964245"
 271                              "5876922391552",
 272                              "1970303740007316867383349976549972270528498040721988191026"
 273                              "49413465737174"))
 274         goto x962_err;
 275 # endif
 276     ret = 1;
 277  x962_err:
 278     if (!restore_rand())
 279         ret = 0;
 280     return ret;
 281 }
 282
 283 int test_builtin(BIO *out)
 284 {
 285     EC_builtin_curve *curves = NULL;
 286     size_t crv_len = 0, n = 0;
 287     EC_KEY *eckey = NULL, *wrong_eckey = NULL;
 288     EC_GROUP *group;
 289     ECDSA_SIG *ecdsa_sig = NULL;
 290     unsigned char digest[20], wrong_digest[20];
 291     unsigned char *signature = NULL;
 292     const unsigned char *sig_ptr;
 293     unsigned char *sig_ptr2;
 294     unsigned char *raw_buf = NULL;
 295     unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len;
 296     int nid, ret = 0;
 297
 298     /* fill digest values with some random data */
 299     if (RAND_pseudo_bytes(digest, 20) <= 0 ||
 300         RAND_pseudo_bytes(wrong_digest, 20) <= 0) {
 301         BIO_printf(out, "ERROR: unable to get random data\n");
 302         goto builtin_err;
 303     }
 304
 305     /*
 306      * create and verify a ecdsa signature with every availble curve (with )
 307      */
 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         BIO_printf(out, "malloc error\n");
 318         goto builtin_err;
 319     }
 320
 321     if (!EC_get_builtin_curves(curves, crv_len)) {
 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         unsigned char dirt, offset;
 329
 330         nid = curves[n].nid;
 331         if (nid == NID_ipsec4)
 332             continue;
 333         /* create new ecdsa key (== EC_KEY) */
 334         if ((eckey = EC_KEY_new()) == NULL)
 335             goto builtin_err;
 336         group = EC_GROUP_new_by_curve_name(nid);
 337         if (group == NULL)
 338             goto builtin_err;
 339         if (EC_KEY_set_group(eckey, group) == 0)
 340             goto builtin_err;
 341         EC_GROUP_free(group);
 342         degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey));
 343         if (degree < 160)
 344             /* drop the curve */
 345         {
 346             EC_KEY_free(eckey);
 347             eckey = NULL;
 348             continue;
 349         }
 350         BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
 351         /* create key */
 352         if (!EC_KEY_generate_key(eckey)) {
 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         group = EC_GROUP_new_by_curve_name(nid);
 360         if (group == NULL)
 361             goto builtin_err;
 362         if (EC_KEY_set_group(wrong_eckey, group) == 0)
 363             goto builtin_err;
 364         EC_GROUP_free(group);
 365         if (!EC_KEY_generate_key(wrong_eckey)) {
 366             BIO_printf(out, " failed\n");
 367             goto builtin_err;
 368         }
 369
 370         BIO_printf(out, ".");
 371         (void)BIO_flush(out);
 372         /* check key */
 373         if (!EC_KEY_check_key(eckey)) {
 374             BIO_printf(out, " failed\n");
 375             goto builtin_err;
 376         }
 377         BIO_printf(out, ".");
 378         (void)BIO_flush(out);
 379         /* create signature */
 380         sig_len = ECDSA_size(eckey);
 381         if ((signature = OPENSSL_malloc(sig_len)) == NULL)
 382             goto builtin_err;
 383         if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey)) {
 384             BIO_printf(out, " failed\n");
 385             goto builtin_err;
 386         }
 387         BIO_printf(out, ".");
 388         (void)BIO_flush(out);
 389         /* verify signature */
 390         if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) {
 391             BIO_printf(out, " failed\n");
 392             goto builtin_err;
 393         }
 394         BIO_printf(out, ".");
 395         (void)BIO_flush(out);
 396         /* verify signature with the wrong key */
 397         if (ECDSA_verify(0, digest, 20, signature, sig_len, wrong_eckey) == 1) {
 398             BIO_printf(out, " failed\n");
 399             goto builtin_err;
 400         }
 401         BIO_printf(out, ".");
 402         (void)BIO_flush(out);
 403         /* wrong digest */
 404         if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len, eckey) == 1) {
 405             BIO_printf(out, " failed\n");
 406             goto builtin_err;
 407         }
 408         BIO_printf(out, ".");
 409         (void)BIO_flush(out);
 410         /* wrong length */
 411         if (ECDSA_verify(0, digest, 20, signature, sig_len - 1, eckey) == 1) {
 412             BIO_printf(out, " failed\n");
 413             goto builtin_err;
 414         }
 415         BIO_printf(out, ".");
 416         (void)BIO_flush(out);
 417
 418         /*
 419          * Modify a single byte of the signature: to ensure we don't garble
 420          * the ASN1 structure, we read the raw signature and modify a byte in
 421          * one of the bignums directly.
 422          */
 423         sig_ptr = signature;
 424         if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == NULL) {
 425             BIO_printf(out, " failed\n");
 426             goto builtin_err;
 427         }
 428
 429         /* Store the two BIGNUMs in raw_buf. */
 430         r_len = BN_num_bytes(ecdsa_sig->r);
 431         s_len = BN_num_bytes(ecdsa_sig->s);
 432         bn_len = (degree + 7) / 8;
 433         if ((r_len > bn_len) || (s_len > bn_len)) {
 434             BIO_printf(out, " failed\n");
 435             goto builtin_err;
 436         }
 437         buf_len = 2 * bn_len;
 438         if ((raw_buf = OPENSSL_malloc(buf_len)) == NULL)
 439             goto builtin_err;
 440         /* Pad the bignums with leading zeroes. */
 441         memset(raw_buf, 0, buf_len);
 442         BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len);
 443         BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len);
 444
 445         /* Modify a single byte in the buffer. */
 446         offset = raw_buf[10] % buf_len;
 447         dirt = raw_buf[11] ? raw_buf[11] : 1;
 448         raw_buf[offset] ^= dirt;
 449         /* Now read the BIGNUMs back in from raw_buf. */
 450         if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) ||
 451             (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL))
 452             goto builtin_err;
 453
 454         sig_ptr2 = signature;
 455         sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
 456         if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) {
 457             BIO_printf(out, " failed\n");
 458             goto builtin_err;
 459         }
 460         /*
 461          * Sanity check: undo the modification and verify signature.
 462          */
 463         raw_buf[offset] ^= dirt;
 464         if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) ||
 465             (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL))
 466             goto builtin_err;
 467
 468         sig_ptr2 = signature;
 469         sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
 470         if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) {
 471             BIO_printf(out, " failed\n");
 472             goto builtin_err;
 473         }
 474         BIO_printf(out, ".");
 475         (void)BIO_flush(out);
 476
 477         BIO_printf(out, " ok\n");
 478         /* cleanup */
 479         /* clean bogus errors */
 480         ERR_clear_error();
 481         OPENSSL_free(signature);
 482         signature = NULL;
 483         EC_KEY_free(eckey);
 484         eckey = NULL;
 485         EC_KEY_free(wrong_eckey);
 486         wrong_eckey = NULL;
 487         ECDSA_SIG_free(ecdsa_sig);
 488         ecdsa_sig = NULL;
 489         OPENSSL_free(raw_buf);
 490         raw_buf = NULL;
 491     }
 492
 493     ret = 1;
 494  builtin_err:
 495     if (eckey)
 496         EC_KEY_free(eckey);
 497     if (wrong_eckey)
 498         EC_KEY_free(wrong_eckey);
 499     if (ecdsa_sig)
 500         ECDSA_SIG_free(ecdsa_sig);
 501     if (signature)
 502         OPENSSL_free(signature);
 503     if (raw_buf)
 504         OPENSSL_free(raw_buf);
 505     if (curves)
 506         OPENSSL_free(curves);
 507
 508     return ret;
 509 }
 510
 511 int main(void)
 512 {
 513     int ret = 1;
 514     BIO *out;
 515
 516     out = BIO_new_fp(stdout, BIO_NOCLOSE);
 517
 518     /* enable memory leak checking unless explicitly disabled */
 519     if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
 520           (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) {
 521         CRYPTO_malloc_debug_init();
 522         CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
 523     } else {
 524         /* OPENSSL_DEBUG_MEMORY=off */
 525         CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
 526     }
 527     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 528
 529     ERR_load_crypto_strings();
 530
 531     /* initialize the prng */
 532     RAND_seed(rnd_seed, sizeof(rnd_seed));
 533
 534     /* the tests */
 535     if (!x9_62_tests(out))
 536         goto err;
 537     if (!test_builtin(out))
 538         goto err;
 539
 540     ret = 0;
 541  err:
 542     if (ret)
 543         BIO_printf(out, "\nECDSA test failed\n");
 544     else
 545         BIO_printf(out, "\nECDSA test passed\n");
 546     if (ret)
 547         ERR_print_errors(out);
 548     CRYPTO_cleanup_all_ex_data();
 549     ERR_remove_thread_state(NULL);
 550     ERR_free_strings();
 551     CRYPTO_mem_leaks(out);
 552     if (out != NULL)
 553         BIO_free(out);
 554     return ret;
 555 }
 556 #endif