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 79int 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 97static const char rnd_seed[] = "string to make the random number generator " 98 "think it has entropy"; 99 100/* declaration of the test functions */ 101int x9_62_tests(BIO *); 102int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s); 103int test_builtin(BIO *); 104 105/* functions to change the RAND_METHOD */ 106int change_rand(void); 107int restore_rand(void); 108int fbytes(unsigned char *buf, int num); 109 110RAND_METHOD fake_rand; 111const RAND_METHOD *old_rand; 112 113int 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 132int restore_rand(void) 133 { 134 if (!RAND_set_rand_method(old_rand)) 135 return 0; 136 else 137 return 1; 138 } 139 140static int fbytes_counter = 0; 141static 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 155int 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 */ 182int 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_by_curve_name(nid)) == NULL) 202 goto x962_int_err; 203 if (!EC_KEY_generate_key(key)) 204 goto x962_int_err; 205 BIO_printf(out, "."); 206 BIO_flush(out); 207 /* create the signature */ 208 signature = ECDSA_do_sign(digest, 20, key); 209 if (signature == NULL) 210 goto x962_int_err; 211 BIO_printf(out, "."); 212 BIO_flush(out); 213 /* compare the created signature with the expected signature */ 214 if ((r = BN_new()) == NULL || (s = BN_new()) == NULL) 215 goto x962_int_err; 216 if (!BN_dec2bn(&r, r_in) || 217 !BN_dec2bn(&s, s_in)) 218 goto x962_int_err; 219 if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s)) 220 goto x962_int_err; 221 BIO_printf(out, "."); 222 BIO_flush(out); 223 /* verify the signature */ 224 if (ECDSA_do_verify(digest, 20, signature, key) != 1) 225 goto x962_int_err; 226 BIO_printf(out, "."); 227 BIO_flush(out); 228 229 BIO_printf(out, " ok\n"); 230 ret = 1; 231x962_int_err: 232 if (!ret) 233 BIO_printf(out, " failed\n"); 234 if (key) 235 EC_KEY_free(key); 236 if (signature) 237 ECDSA_SIG_free(signature); 238 if (r) 239 BN_free(r); 240 if (s) 241 BN_free(s); 242 EVP_MD_CTX_cleanup(&md_ctx); 243 return ret; 244 } 245 246int x9_62_tests(BIO *out) 247 { 248 int ret = 0; 249 250 BIO_printf(out, "some tests from X9.62:\n"); 251 252 /* set own rand method */ 253 if (!change_rand()) 254 goto x962_err; 255 256 if (!x9_62_test_internal(out, NID_X9_62_prime192v1, 257 "3342403536405981729393488334694600415596881826869351677613", 258 "5735822328888155254683894997897571951568553642892029982342")) 259 goto x962_err; 260 if (!x9_62_test_internal(out, NID_X9_62_prime239v1, 261 "3086361431751678114926225473006680188549593787585317781474" 262 "62058306432176", 263 "3238135532097973577080787768312505059318910517550078427819" 264 "78505179448783")) 265 goto x962_err; 266 if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1, 267 "87194383164871543355722284926904419997237591535066528048", 268 "308992691965804947361541664549085895292153777025772063598")) 269 goto x962_err; 270 if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1, 271 "2159633321041961198501834003903461262881815148684178964245" 272 "5876922391552", 273 "1970303740007316867383349976549972270528498040721988191026" 274 "49413465737174")) 275 goto x962_err; 276 277 ret = 1; 278x962_err: 279 if (!restore_rand()) 280 ret = 0; 281 return ret; 282 } 283 284int test_builtin(BIO *out) 285 { 286 EC_builtin_curve *curves = NULL; 287 size_t crv_len = 0, n = 0; 288 EC_KEY *eckey = NULL, *wrong_eckey = NULL; 289 EC_GROUP *group; 290 unsigned char digest[20], wrong_digest[20]; 291 unsigned char *signature = NULL; 292 unsigned int sig_len; 293 int nid, ret = 0; 294 295 /* fill digest values with some random data */ 296 if (!RAND_pseudo_bytes(digest, 20) || 297 !RAND_pseudo_bytes(wrong_digest, 20)) 298 { 299 BIO_printf(out, "ERROR: unable to get random data\n"); 300 goto builtin_err; 301 } 302 303 /* create and verify a ecdsa signature with every availble curve 304 * (with ) */ 305 BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() " 306 "with some internal curves:\n"); 307 308 /* get a list of all internal curves */ 309 crv_len = EC_get_builtin_curves(NULL, 0); 310 311 curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len); 312 313 if (curves == NULL) 314 { 315 BIO_printf(out, "malloc error\n"); 316 goto builtin_err; 317 } 318 319 if (!EC_get_builtin_curves(curves, crv_len)) 320 { 321 BIO_printf(out, "unable to get internal curves\n"); 322 goto builtin_err; 323 } 324 325 /* now create and verify a signature for every curve */ 326 for (n = 0; n < crv_len; n++) 327 { 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 if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160) 343 /* drop the curve */ 344 { 345 EC_KEY_free(eckey); 346 eckey = NULL; 347 continue; 348 } 349 BIO_printf(out, "%s: ", OBJ_nid2sn(nid)); 350 /* create key */ 351 if (!EC_KEY_generate_key(eckey)) 352 { 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 { 367 BIO_printf(out, " failed\n"); 368 goto builtin_err; 369 } 370 371 BIO_printf(out, "."); 372 BIO_flush(out); 373 /* check key */ 374 if (!EC_KEY_check_key(eckey)) 375 { 376 BIO_printf(out, " failed\n"); 377 goto builtin_err; 378 } 379 BIO_printf(out, "."); 380 BIO_flush(out); 381 /* create signature */ 382 sig_len = ECDSA_size(eckey); 383 if ((signature = OPENSSL_malloc(sig_len)) == NULL) 384 goto builtin_err; 385 if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey)) 386 { 387 BIO_printf(out, " failed\n"); 388 goto builtin_err; 389 } 390 BIO_printf(out, "."); 391 BIO_flush(out); 392 /* verify signature */ 393 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) 394 { 395 BIO_printf(out, " failed\n"); 396 goto builtin_err; 397 } 398 BIO_printf(out, "."); 399 BIO_flush(out); 400 /* verify signature with the wrong key */ 401 if (ECDSA_verify(0, digest, 20, signature, sig_len, 402 wrong_eckey) == 1) 403 { 404 BIO_printf(out, " failed\n"); 405 goto builtin_err; 406 } 407 BIO_printf(out, "."); 408 BIO_flush(out); 409 /* wrong digest */ 410 if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len, 411 eckey) == 1) 412 { 413 BIO_printf(out, " failed\n"); 414 goto builtin_err; 415 } 416 BIO_printf(out, "."); 417 BIO_flush(out); 418 /* modify a single byte of the signature */ 419 offset = signature[10] % sig_len; 420 dirt = signature[11]; 421 signature[offset] ^= dirt ? dirt : 1; 422 if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) 423 { 424 BIO_printf(out, " failed\n"); 425 goto builtin_err; 426 } 427 BIO_printf(out, "."); 428 BIO_flush(out); 429 430 BIO_printf(out, " ok\n"); 431 /* cleanup */ 432 OPENSSL_free(signature); 433 signature = NULL; 434 EC_KEY_free(eckey); 435 eckey = NULL; 436 EC_KEY_free(wrong_eckey); 437 wrong_eckey = NULL; 438 } 439 440 ret = 1; 441builtin_err: 442 if (eckey) 443 EC_KEY_free(eckey); 444 if (wrong_eckey) 445 EC_KEY_free(wrong_eckey); 446 if (signature) 447 OPENSSL_free(signature); 448 if (curves) 449 OPENSSL_free(curves); 450 451 return ret; 452 } 453 454int main(void) 455 { 456 int ret = 1; 457 BIO *out; 458 459 out = BIO_new_fp(stdout, BIO_NOCLOSE); 460 461 /* enable memory leak checking unless explicitly disabled */ 462 if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && 463 (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) 464 { 465 CRYPTO_malloc_debug_init(); 466 CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); 467 } 468 else 469 { 470 /* OPENSSL_DEBUG_MEMORY=off */ 471 CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0); 472 } 473 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); 474 475 ERR_load_crypto_strings(); 476 477 /* initialize the prng */ 478 RAND_seed(rnd_seed, sizeof(rnd_seed)); 479 480 /* the tests */ 481 if (!x9_62_tests(out)) goto err; 482 if (!test_builtin(out)) goto err; 483 484 ret = 0; 485err: 486 if (ret) 487 BIO_printf(out, "\nECDSA test failed\n"); 488 else 489 BIO_printf(out, "\nECDSA test passed\n"); 490 if (ret) 491 ERR_print_errors(out); 492 CRYPTO_cleanup_all_ex_data(); 493 ERR_remove_state(0); 494 ERR_free_strings(); 495 CRYPTO_mem_leaks(out); 496 if (out != NULL) 497 BIO_free(out); 498 return ret; 499 } 500#endif 501