ecparam.c revision 296465
1/* apps/ecparam.c */ 2/* 3 * Written by Nils Larsch for the OpenSSL project. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1998-2005 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 * openssl-core@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 <openssl/opensslconf.h> 73#ifndef OPENSSL_NO_EC 74# include <assert.h> 75# include <stdio.h> 76# include <stdlib.h> 77# include <time.h> 78# include <string.h> 79# include "apps.h" 80# include <openssl/bio.h> 81# include <openssl/err.h> 82# include <openssl/bn.h> 83# include <openssl/ec.h> 84# include <openssl/x509.h> 85# include <openssl/pem.h> 86 87# undef PROG 88# define PROG ecparam_main 89 90/*- 91 * -inform arg - input format - default PEM (DER or PEM) 92 * -outform arg - output format - default PEM 93 * -in arg - input file - default stdin 94 * -out arg - output file - default stdout 95 * -noout - do not print the ec parameter 96 * -text - print the ec parameters in text form 97 * -check - validate the ec parameters 98 * -C - print a 'C' function creating the parameters 99 * -name arg - use the ec parameters with 'short name' name 100 * -list_curves - prints a list of all currently available curve 'short names' 101 * -conv_form arg - specifies the point conversion form 102 * - possible values: compressed 103 * uncompressed (default) 104 * hybrid 105 * -param_enc arg - specifies the way the ec parameters are encoded 106 * in the asn1 der encoding 107 * possible values: named_curve (default) 108 * explicit 109 * -no_seed - if 'explicit' parameters are choosen do not use the seed 110 * -genkey - generate ec key 111 * -rand file - files to use for random number input 112 * -engine e - use engine e, possibly a hardware device 113 */ 114 115static int ecparam_print_var(BIO *, BIGNUM *, const char *, int, 116 unsigned char *); 117 118int MAIN(int, char **); 119 120int MAIN(int argc, char **argv) 121{ 122 EC_GROUP *group = NULL; 123 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED; 124 int new_form = 0; 125 int asn1_flag = OPENSSL_EC_NAMED_CURVE; 126 int new_asn1_flag = 0; 127 char *curve_name = NULL, *inrand = NULL; 128 int list_curves = 0, no_seed = 0, check = 0, 129 badops = 0, text = 0, i, need_rand = 0, genkey = 0; 130 char *infile = NULL, *outfile = NULL, *prog; 131 BIO *in = NULL, *out = NULL; 132 int informat, outformat, noout = 0, C = 0, ret = 1; 133 char *engine = NULL; 134 135 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL, 136 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL; 137 unsigned char *buffer = NULL; 138 139 apps_startup(); 140 141 if (bio_err == NULL) 142 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 143 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT); 144 145 if (!load_config(bio_err, NULL)) 146 goto end; 147 148 informat = FORMAT_PEM; 149 outformat = FORMAT_PEM; 150 151 prog = argv[0]; 152 argc--; 153 argv++; 154 while (argc >= 1) { 155 if (strcmp(*argv, "-inform") == 0) { 156 if (--argc < 1) 157 goto bad; 158 informat = str2fmt(*(++argv)); 159 } else if (strcmp(*argv, "-outform") == 0) { 160 if (--argc < 1) 161 goto bad; 162 outformat = str2fmt(*(++argv)); 163 } else if (strcmp(*argv, "-in") == 0) { 164 if (--argc < 1) 165 goto bad; 166 infile = *(++argv); 167 } else if (strcmp(*argv, "-out") == 0) { 168 if (--argc < 1) 169 goto bad; 170 outfile = *(++argv); 171 } else if (strcmp(*argv, "-text") == 0) 172 text = 1; 173 else if (strcmp(*argv, "-C") == 0) 174 C = 1; 175 else if (strcmp(*argv, "-check") == 0) 176 check = 1; 177 else if (strcmp(*argv, "-name") == 0) { 178 if (--argc < 1) 179 goto bad; 180 curve_name = *(++argv); 181 } else if (strcmp(*argv, "-list_curves") == 0) 182 list_curves = 1; 183 else if (strcmp(*argv, "-conv_form") == 0) { 184 if (--argc < 1) 185 goto bad; 186 ++argv; 187 new_form = 1; 188 if (strcmp(*argv, "compressed") == 0) 189 form = POINT_CONVERSION_COMPRESSED; 190 else if (strcmp(*argv, "uncompressed") == 0) 191 form = POINT_CONVERSION_UNCOMPRESSED; 192 else if (strcmp(*argv, "hybrid") == 0) 193 form = POINT_CONVERSION_HYBRID; 194 else 195 goto bad; 196 } else if (strcmp(*argv, "-param_enc") == 0) { 197 if (--argc < 1) 198 goto bad; 199 ++argv; 200 new_asn1_flag = 1; 201 if (strcmp(*argv, "named_curve") == 0) 202 asn1_flag = OPENSSL_EC_NAMED_CURVE; 203 else if (strcmp(*argv, "explicit") == 0) 204 asn1_flag = 0; 205 else 206 goto bad; 207 } else if (strcmp(*argv, "-no_seed") == 0) 208 no_seed = 1; 209 else if (strcmp(*argv, "-noout") == 0) 210 noout = 1; 211 else if (strcmp(*argv, "-genkey") == 0) { 212 genkey = 1; 213 need_rand = 1; 214 } else if (strcmp(*argv, "-rand") == 0) { 215 if (--argc < 1) 216 goto bad; 217 inrand = *(++argv); 218 need_rand = 1; 219 } else if (strcmp(*argv, "-engine") == 0) { 220 if (--argc < 1) 221 goto bad; 222 engine = *(++argv); 223 } else { 224 BIO_printf(bio_err, "unknown option %s\n", *argv); 225 badops = 1; 226 break; 227 } 228 argc--; 229 argv++; 230 } 231 232 if (badops) { 233 bad: 234 BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog); 235 BIO_printf(bio_err, "where options are\n"); 236 BIO_printf(bio_err, " -inform arg input format - " 237 "default PEM (DER or PEM)\n"); 238 BIO_printf(bio_err, " -outform arg output format - " 239 "default PEM\n"); 240 BIO_printf(bio_err, " -in arg input file - " 241 "default stdin\n"); 242 BIO_printf(bio_err, " -out arg output file - " 243 "default stdout\n"); 244 BIO_printf(bio_err, " -noout do not print the " 245 "ec parameter\n"); 246 BIO_printf(bio_err, " -text print the ec " 247 "parameters in text form\n"); 248 BIO_printf(bio_err, " -check validate the ec " 249 "parameters\n"); 250 BIO_printf(bio_err, " -C print a 'C' " 251 "function creating the parameters\n"); 252 BIO_printf(bio_err, " -name arg use the " 253 "ec parameters with 'short name' name\n"); 254 BIO_printf(bio_err, " -list_curves prints a list of " 255 "all currently available curve 'short names'\n"); 256 BIO_printf(bio_err, " -conv_form arg specifies the " 257 "point conversion form \n"); 258 BIO_printf(bio_err, " possible values:" 259 " compressed\n"); 260 BIO_printf(bio_err, " " 261 " uncompressed (default)\n"); 262 BIO_printf(bio_err, " " 263 " hybrid\n"); 264 BIO_printf(bio_err, " -param_enc arg specifies the way" 265 " the ec parameters are encoded\n"); 266 BIO_printf(bio_err, " in the asn1 der " 267 "encoding\n"); 268 BIO_printf(bio_err, " possible values:" 269 " named_curve (default)\n"); 270 BIO_printf(bio_err, " " 271 " explicit\n"); 272 BIO_printf(bio_err, " -no_seed if 'explicit'" 273 " parameters are choosen do not" " use the seed\n"); 274 BIO_printf(bio_err, " -genkey generate ec" " key\n"); 275 BIO_printf(bio_err, " -rand file files to use for" 276 " random number input\n"); 277 BIO_printf(bio_err, " -engine e use engine e, " 278 "possibly a hardware device\n"); 279 goto end; 280 } 281 282 ERR_load_crypto_strings(); 283 284 in = BIO_new(BIO_s_file()); 285 out = BIO_new(BIO_s_file()); 286 if ((in == NULL) || (out == NULL)) { 287 ERR_print_errors(bio_err); 288 goto end; 289 } 290 291 if (infile == NULL) 292 BIO_set_fp(in, stdin, BIO_NOCLOSE); 293 else { 294 if (BIO_read_filename(in, infile) <= 0) { 295 perror(infile); 296 goto end; 297 } 298 } 299 if (outfile == NULL) { 300 BIO_set_fp(out, stdout, BIO_NOCLOSE); 301# ifdef OPENSSL_SYS_VMS 302 { 303 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 304 out = BIO_push(tmpbio, out); 305 } 306# endif 307 } else { 308 if (BIO_write_filename(out, outfile) <= 0) { 309 perror(outfile); 310 goto end; 311 } 312 } 313 314# ifndef OPENSSL_NO_ENGINE 315 setup_engine(bio_err, engine, 0); 316# endif 317 318 if (list_curves) { 319 EC_builtin_curve *curves = NULL; 320 size_t crv_len = 0; 321 size_t n = 0; 322 323 crv_len = EC_get_builtin_curves(NULL, 0); 324 325 curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len)); 326 327 if (curves == NULL) 328 goto end; 329 330 if (!EC_get_builtin_curves(curves, crv_len)) { 331 OPENSSL_free(curves); 332 goto end; 333 } 334 335 for (n = 0; n < crv_len; n++) { 336 const char *comment; 337 const char *sname; 338 comment = curves[n].comment; 339 sname = OBJ_nid2sn(curves[n].nid); 340 if (comment == NULL) 341 comment = "CURVE DESCRIPTION NOT AVAILABLE"; 342 if (sname == NULL) 343 sname = ""; 344 345 BIO_printf(out, " %-10s: ", sname); 346 BIO_printf(out, "%s\n", comment); 347 } 348 349 OPENSSL_free(curves); 350 ret = 0; 351 goto end; 352 } 353 354 if (curve_name != NULL) { 355 int nid; 356 357 /* 358 * workaround for the SECG curve names secp192r1 and secp256r1 (which 359 * are the same as the curves prime192v1 and prime256v1 defined in 360 * X9.62) 361 */ 362 if (!strcmp(curve_name, "secp192r1")) { 363 BIO_printf(bio_err, "using curve name prime192v1 " 364 "instead of secp192r1\n"); 365 nid = NID_X9_62_prime192v1; 366 } else if (!strcmp(curve_name, "secp256r1")) { 367 BIO_printf(bio_err, "using curve name prime256v1 " 368 "instead of secp256r1\n"); 369 nid = NID_X9_62_prime256v1; 370 } else 371 nid = OBJ_sn2nid(curve_name); 372 373 if (nid == 0) { 374 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name); 375 goto end; 376 } 377 378 group = EC_GROUP_new_by_curve_name(nid); 379 if (group == NULL) { 380 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name); 381 goto end; 382 } 383 EC_GROUP_set_asn1_flag(group, asn1_flag); 384 EC_GROUP_set_point_conversion_form(group, form); 385 } else if (informat == FORMAT_ASN1) { 386 group = d2i_ECPKParameters_bio(in, NULL); 387 } else if (informat == FORMAT_PEM) { 388 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL); 389 } else { 390 BIO_printf(bio_err, "bad input format specified\n"); 391 goto end; 392 } 393 394 if (group == NULL) { 395 BIO_printf(bio_err, "unable to load elliptic curve parameters\n"); 396 ERR_print_errors(bio_err); 397 goto end; 398 } 399 400 if (new_form) 401 EC_GROUP_set_point_conversion_form(group, form); 402 403 if (new_asn1_flag) 404 EC_GROUP_set_asn1_flag(group, asn1_flag); 405 406 if (no_seed) { 407 EC_GROUP_set_seed(group, NULL, 0); 408 } 409 410 if (text) { 411 if (!ECPKParameters_print(out, group, 0)) 412 goto end; 413 } 414 415 if (check) { 416 if (group == NULL) 417 BIO_printf(bio_err, "no elliptic curve parameters\n"); 418 BIO_printf(bio_err, "checking elliptic curve parameters: "); 419 if (!EC_GROUP_check(group, NULL)) { 420 BIO_printf(bio_err, "failed\n"); 421 ERR_print_errors(bio_err); 422 } else 423 BIO_printf(bio_err, "ok\n"); 424 425 } 426 427 if (C) { 428 size_t buf_len = 0, tmp_len = 0; 429 const EC_POINT *point; 430 int is_prime, len = 0; 431 const EC_METHOD *meth = EC_GROUP_method_of(group); 432 433 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL || 434 (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL || 435 (ec_order = BN_new()) == NULL || 436 (ec_cofactor = BN_new()) == NULL) { 437 perror("OPENSSL_malloc"); 438 goto end; 439 } 440 441 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field); 442 443 if (is_prime) { 444 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL)) 445 goto end; 446 } else { 447 /* TODO */ 448 goto end; 449 } 450 451 if ((point = EC_GROUP_get0_generator(group)) == NULL) 452 goto end; 453 if (!EC_POINT_point2bn(group, point, 454 EC_GROUP_get_point_conversion_form(group), 455 ec_gen, NULL)) 456 goto end; 457 if (!EC_GROUP_get_order(group, ec_order, NULL)) 458 goto end; 459 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL)) 460 goto end; 461 462 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor) 463 goto end; 464 465 len = BN_num_bits(ec_order); 466 467 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len) 468 buf_len = tmp_len; 469 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len) 470 buf_len = tmp_len; 471 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len) 472 buf_len = tmp_len; 473 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len) 474 buf_len = tmp_len; 475 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len) 476 buf_len = tmp_len; 477 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len) 478 buf_len = tmp_len; 479 480 buffer = (unsigned char *)OPENSSL_malloc(buf_len); 481 482 if (buffer == NULL) { 483 perror("OPENSSL_malloc"); 484 goto end; 485 } 486 487 ecparam_print_var(out, ec_p, "ec_p", len, buffer); 488 ecparam_print_var(out, ec_a, "ec_a", len, buffer); 489 ecparam_print_var(out, ec_b, "ec_b", len, buffer); 490 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer); 491 ecparam_print_var(out, ec_order, "ec_order", len, buffer); 492 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, buffer); 493 494 BIO_printf(out, "\n\n"); 495 496 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len); 497 BIO_printf(out, "\tint ok=0;\n"); 498 BIO_printf(out, "\tEC_GROUP *group = NULL;\n"); 499 BIO_printf(out, "\tEC_POINT *point = NULL;\n"); 500 BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, " 501 "*tmp_3 = NULL;\n\n"); 502 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, " 503 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t" 504 "goto err;\n", len, len); 505 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, " 506 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t" 507 "goto err;\n", len, len); 508 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, " 509 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t" 510 "goto err;\n", len, len); 511 if (is_prime) { 512 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_" 513 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)" 514 "\n\t\tgoto err;\n\n"); 515 } else { 516 /* TODO */ 517 goto end; 518 } 519 BIO_printf(out, "\t/* build generator */\n"); 520 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, " 521 "sizeof(ec_gen_%d), tmp_1)) == NULL)" 522 "\n\t\tgoto err;\n", len, len); 523 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, " 524 "NULL, NULL);\n"); 525 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n"); 526 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, " 527 "sizeof(ec_order_%d), tmp_2)) == NULL)" 528 "\n\t\tgoto err;\n", len, len); 529 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, " 530 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)" 531 "\n\t\tgoto err;\n", len, len); 532 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point," 533 " tmp_2, tmp_3))\n\t\tgoto err;\n"); 534 BIO_printf(out, "\n\tok=1;\n"); 535 BIO_printf(out, "err:\n"); 536 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n"); 537 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n"); 538 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n"); 539 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n"); 540 BIO_printf(out, "\tif (!ok)\n"); 541 BIO_printf(out, "\t\t{\n"); 542 BIO_printf(out, "\t\tEC_GROUP_free(group);\n"); 543 BIO_printf(out, "\t\tgroup = NULL;\n"); 544 BIO_printf(out, "\t\t}\n"); 545 BIO_printf(out, "\treturn(group);\n\t}\n"); 546 } 547 548 if (!noout) { 549 if (outformat == FORMAT_ASN1) 550 i = i2d_ECPKParameters_bio(out, group); 551 else if (outformat == FORMAT_PEM) 552 i = PEM_write_bio_ECPKParameters(out, group); 553 else { 554 BIO_printf(bio_err, "bad output format specified for" 555 " outfile\n"); 556 goto end; 557 } 558 if (!i) { 559 BIO_printf(bio_err, "unable to write elliptic " 560 "curve parameters\n"); 561 ERR_print_errors(bio_err); 562 goto end; 563 } 564 } 565 566 if (need_rand) { 567 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 568 if (inrand != NULL) 569 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 570 app_RAND_load_files(inrand)); 571 } 572 573 if (genkey) { 574 EC_KEY *eckey = EC_KEY_new(); 575 576 if (eckey == NULL) 577 goto end; 578 579 assert(need_rand); 580 581 if (EC_KEY_set_group(eckey, group) == 0) 582 goto end; 583 584 if (!EC_KEY_generate_key(eckey)) { 585 EC_KEY_free(eckey); 586 goto end; 587 } 588 if (outformat == FORMAT_ASN1) 589 i = i2d_ECPrivateKey_bio(out, eckey); 590 else if (outformat == FORMAT_PEM) 591 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL, 592 NULL, 0, NULL, NULL); 593 else { 594 BIO_printf(bio_err, "bad output format specified " 595 "for outfile\n"); 596 EC_KEY_free(eckey); 597 goto end; 598 } 599 EC_KEY_free(eckey); 600 } 601 602 if (need_rand) 603 app_RAND_write_file(NULL, bio_err); 604 605 ret = 0; 606 end: 607 if (ec_p) 608 BN_free(ec_p); 609 if (ec_a) 610 BN_free(ec_a); 611 if (ec_b) 612 BN_free(ec_b); 613 if (ec_gen) 614 BN_free(ec_gen); 615 if (ec_order) 616 BN_free(ec_order); 617 if (ec_cofactor) 618 BN_free(ec_cofactor); 619 if (buffer) 620 OPENSSL_free(buffer); 621 if (in != NULL) 622 BIO_free(in); 623 if (out != NULL) 624 BIO_free_all(out); 625 if (group != NULL) 626 EC_GROUP_free(group); 627 apps_shutdown(); 628 OPENSSL_EXIT(ret); 629} 630 631static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var, 632 int len, unsigned char *buffer) 633{ 634 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len); 635 if (BN_is_zero(in)) 636 BIO_printf(out, "\n\t0x00"); 637 else { 638 int i, l; 639 640 l = BN_bn2bin(in, buffer); 641 for (i = 0; i < l - 1; i++) { 642 if ((i % 12) == 0) 643 BIO_printf(out, "\n\t"); 644 BIO_printf(out, "0x%02X,", buffer[i]); 645 } 646 if ((i % 12) == 0) 647 BIO_printf(out, "\n\t"); 648 BIO_printf(out, "0x%02X", buffer[i]); 649 } 650 BIO_printf(out, "\n\t};\n\n"); 651 return 1; 652} 653#endif 654