1 /* $OpenBSD: ecparam.c,v 1.8 2014/12/28 15:48:52 jsing Exp $ */ 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 74 #ifndef OPENSSL_NO_EC 75 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <time.h> 80 81 #include "apps.h" 82 83 #include <openssl/bio.h> 84 #include <openssl/bn.h> 85 #include <openssl/ec.h> 86 #include <openssl/err.h> 87 #include <openssl/pem.h> 88 #include <openssl/x509.h> 89 90 static int ecparam_print_var(BIO *, BIGNUM *, const char *, int, 91 unsigned char *); 92 93 static struct { 94 int C; 95 int asn1_flag; 96 int check; 97 char *curve_name; 98 char *engine; 99 point_conversion_form_t form; 100 int genkey; 101 char *infile; 102 int informat; 103 int list_curves; 104 int new_asn1_flag; 105 int new_form; 106 int no_seed; 107 int noout; 108 char *outfile; 109 int outformat; 110 int text; 111 } ecparam_config; 112 113 static int 114 ecparam_opt_form(char *arg) 115 { 116 if (strcmp(arg, "compressed") == 0) 117 ecparam_config.form = POINT_CONVERSION_COMPRESSED; 118 else if (strcmp(arg, "uncompressed") == 0) 119 ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED; 120 else if (strcmp(arg, "hybrid") == 0) 121 ecparam_config.form = POINT_CONVERSION_HYBRID; 122 else 123 return (1); 124 125 ecparam_config.new_form = 1; 126 return (0); 127 } 128 129 static int 130 ecparam_opt_enctype(char *arg) 131 { 132 if (strcmp(arg, "explicit") == 0) 133 ecparam_config.asn1_flag = 0; 134 else if (strcmp(arg, "named_curve") == 0) 135 ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE; 136 else 137 return (1); 138 139 ecparam_config.new_asn1_flag = 1; 140 return (0); 141 } 142 143 struct option ecparam_options[] = { 144 { 145 .name = "C", 146 .desc = "Convert the EC parameters into C code", 147 .type = OPTION_FLAG, 148 .opt.flag = &ecparam_config.C, 149 }, 150 { 151 .name = "check", 152 .desc = "Validate the elliptic curve parameters", 153 .type = OPTION_FLAG, 154 .opt.flag = &ecparam_config.check, 155 }, 156 { 157 .name = "conv_form", 158 .argname = "form", 159 .desc = "Specify point conversion form:\n" 160 " compressed, uncompressed (default), hybrid", 161 .type = OPTION_ARG_FUNC, 162 .opt.argfunc = ecparam_opt_form, 163 }, 164 #ifndef OPENSSL_NO_ENGINE 165 { 166 .name = "engine", 167 .argname = "id", 168 .desc = "Use the engine specified by the given identifier", 169 .type = OPTION_ARG, 170 .opt.arg = &ecparam_config.engine, 171 }, 172 #endif 173 { 174 .name = "genkey", 175 .desc = "Generate an EC private key using the specified " 176 "parameters", 177 .type = OPTION_FLAG, 178 .opt.flag = &ecparam_config.genkey, 179 }, 180 { 181 .name = "in", 182 .argname = "file", 183 .desc = "Input file to read parameters from (default stdin)", 184 .type = OPTION_ARG, 185 .opt.arg = &ecparam_config.infile, 186 }, 187 { 188 .name = "inform", 189 .argname = "format", 190 .desc = "Input format (DER or PEM)", 191 .type = OPTION_ARG_FORMAT, 192 .opt.value = &ecparam_config.informat, 193 }, 194 { 195 .name = "list_curves", 196 .desc = "Print list of all currently implemented EC " 197 "parameter names", 198 .type = OPTION_FLAG, 199 .opt.flag = &ecparam_config.list_curves, 200 }, 201 { 202 .name = "name", 203 .argname = "curve", 204 .desc = "Use the EC parameters with the specified name", 205 .type = OPTION_ARG, 206 .opt.arg = &ecparam_config.curve_name, 207 }, 208 { 209 .name = "no_seed", 210 .desc = "Do not output seed with explicit parameter encoding", 211 .type = OPTION_FLAG, 212 .opt.flag = &ecparam_config.no_seed, 213 }, 214 { 215 .name = "noout", 216 .desc = "Do not output encoded version of EC parameters", 217 .type = OPTION_FLAG, 218 .opt.flag = &ecparam_config.noout, 219 }, 220 { 221 .name = "out", 222 .argname = "file", 223 .desc = "Output file to write parameters to (default stdout)", 224 .type = OPTION_ARG, 225 .opt.arg = &ecparam_config.outfile, 226 }, 227 { 228 .name = "outform", 229 .argname = "format", 230 .desc = "Output format (DER or PEM)", 231 .type = OPTION_ARG_FORMAT, 232 .opt.value = &ecparam_config.outformat, 233 }, 234 { 235 .name = "param_enc", 236 .argname = "type", 237 .desc = "Specify EC parameter ASN.1 encoding type:\n" 238 " explicit, named_curve (default)", 239 .type = OPTION_ARG_FUNC, 240 .opt.argfunc = ecparam_opt_enctype, 241 }, 242 { 243 .name = "text", 244 .desc = "Print out the EC parameters in human readable form", 245 .type = OPTION_FLAG, 246 .opt.flag = &ecparam_config.text, 247 }, 248 {NULL}, 249 }; 250 251 static void 252 ecparam_usage(void) 253 { 254 fprintf(stderr, "usage: ecparam [-C] [-check] [-conv_form arg] " 255 "[-engine id] [-genkey]\n" 256 " [-in file] [-inform DER | PEM] [-list_curves] [-name arg]\n" 257 " [-no_seed] [-noout] [-out file] [-outform DER | PEM]\n" 258 " [-param_enc arg] [-text]\n\n"); 259 options_usage(ecparam_options); 260 } 261 262 int ecparam_main(int, char **); 263 264 int 265 ecparam_main(int argc, char **argv) 266 { 267 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL, *ec_gen = NULL; 268 BIGNUM *ec_order = NULL, *ec_cofactor = NULL; 269 EC_GROUP *group = NULL; 270 unsigned char *buffer = NULL; 271 BIO *in = NULL, *out = NULL; 272 int i, ret = 1; 273 274 memset(&ecparam_config, 0, sizeof(ecparam_config)); 275 ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE; 276 ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED; 277 ecparam_config.informat = FORMAT_PEM; 278 ecparam_config.outformat = FORMAT_PEM; 279 280 if (options_parse(argc, argv, ecparam_options, NULL, NULL) != 0) { 281 ecparam_usage(); 282 goto end; 283 } 284 285 in = BIO_new(BIO_s_file()); 286 out = BIO_new(BIO_s_file()); 287 if ((in == NULL) || (out == NULL)) { 288 ERR_print_errors(bio_err); 289 goto end; 290 } 291 if (ecparam_config.infile == NULL) 292 BIO_set_fp(in, stdin, BIO_NOCLOSE); 293 else { 294 if (BIO_read_filename(in, ecparam_config.infile) <= 0) { 295 perror(ecparam_config.infile); 296 goto end; 297 } 298 } 299 if (ecparam_config.outfile == NULL) { 300 BIO_set_fp(out, stdout, BIO_NOCLOSE); 301 } else { 302 if (BIO_write_filename(out, ecparam_config.outfile) <= 0) { 303 perror(ecparam_config.outfile); 304 goto end; 305 } 306 } 307 308 #ifndef OPENSSL_NO_ENGINE 309 setup_engine(bio_err, ecparam_config.engine, 0); 310 #endif 311 312 if (ecparam_config.list_curves) { 313 EC_builtin_curve *curves = NULL; 314 size_t crv_len = 0; 315 size_t n = 0; 316 317 crv_len = EC_get_builtin_curves(NULL, 0); 318 319 curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve)); 320 if (curves == NULL) 321 goto end; 322 323 if (!EC_get_builtin_curves(curves, crv_len)) { 324 free(curves); 325 goto end; 326 } 327 for (n = 0; n < crv_len; n++) { 328 const char *comment; 329 const char *sname; 330 comment = curves[n].comment; 331 sname = OBJ_nid2sn(curves[n].nid); 332 if (comment == NULL) 333 comment = "CURVE DESCRIPTION NOT AVAILABLE"; 334 if (sname == NULL) 335 sname = ""; 336 337 BIO_printf(out, " %-10s: ", sname); 338 BIO_printf(out, "%s\n", comment); 339 } 340 341 free(curves); 342 ret = 0; 343 goto end; 344 } 345 if (ecparam_config.curve_name != NULL) { 346 int nid; 347 348 /* 349 * workaround for the SECG curve names secp192r1 and 350 * secp256r1 (which are the same as the curves prime192v1 and 351 * prime256v1 defined in X9.62) 352 */ 353 if (!strcmp(ecparam_config.curve_name, "secp192r1")) { 354 BIO_printf(bio_err, "using curve name prime192v1 " 355 "instead of secp192r1\n"); 356 nid = NID_X9_62_prime192v1; 357 } else if (!strcmp(ecparam_config.curve_name, "secp256r1")) { 358 BIO_printf(bio_err, "using curve name prime256v1 " 359 "instead of secp256r1\n"); 360 nid = NID_X9_62_prime256v1; 361 } else 362 nid = OBJ_sn2nid(ecparam_config.curve_name); 363 364 if (nid == 0) { 365 BIO_printf(bio_err, "unknown curve name (%s)\n", 366 ecparam_config.curve_name); 367 goto end; 368 } 369 group = EC_GROUP_new_by_curve_name(nid); 370 if (group == NULL) { 371 BIO_printf(bio_err, "unable to create curve (%s)\n", 372 ecparam_config.curve_name); 373 goto end; 374 } 375 EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag); 376 EC_GROUP_set_point_conversion_form(group, ecparam_config.form); 377 } else if (ecparam_config.informat == FORMAT_ASN1) { 378 group = d2i_ECPKParameters_bio(in, NULL); 379 } else if (ecparam_config.informat == FORMAT_PEM) { 380 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL); 381 } else { 382 BIO_printf(bio_err, "bad input format specified\n"); 383 goto end; 384 } 385 386 if (group == NULL) { 387 BIO_printf(bio_err, 388 "unable to load elliptic curve parameters\n"); 389 ERR_print_errors(bio_err); 390 goto end; 391 } 392 if (ecparam_config.new_form) 393 EC_GROUP_set_point_conversion_form(group, ecparam_config.form); 394 395 if (ecparam_config.new_asn1_flag) 396 EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag); 397 398 if (ecparam_config.no_seed) 399 EC_GROUP_set_seed(group, NULL, 0); 400 401 if (ecparam_config.text) { 402 if (!ECPKParameters_print(out, group, 0)) 403 goto end; 404 } 405 if (ecparam_config.check) { 406 if (group == NULL) 407 BIO_printf(bio_err, "no elliptic curve parameters\n"); 408 BIO_printf(bio_err, "checking elliptic curve parameters: "); 409 if (!EC_GROUP_check(group, NULL)) { 410 BIO_printf(bio_err, "failed\n"); 411 ERR_print_errors(bio_err); 412 } else 413 BIO_printf(bio_err, "ok\n"); 414 415 } 416 if (ecparam_config.C) { 417 size_t buf_len = 0, tmp_len = 0; 418 const EC_POINT *point; 419 int is_prime, len = 0; 420 const EC_METHOD *meth = EC_GROUP_method_of(group); 421 422 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL || 423 (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL || 424 (ec_order = BN_new()) == NULL || 425 (ec_cofactor = BN_new()) == NULL) { 426 perror("malloc"); 427 goto end; 428 } 429 is_prime = (EC_METHOD_get_field_type(meth) == 430 NID_X9_62_prime_field); 431 432 if (is_prime) { 433 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, 434 ec_b, NULL)) 435 goto end; 436 } else { 437 if (!EC_GROUP_get_curve_GF2m(group, ec_p, ec_a, 438 ec_b, NULL)) 439 goto end; 440 } 441 442 if ((point = EC_GROUP_get0_generator(group)) == NULL) 443 goto end; 444 if (!EC_POINT_point2bn(group, point, 445 EC_GROUP_get_point_conversion_form(group), ec_gen, 446 NULL)) 447 goto end; 448 if (!EC_GROUP_get_order(group, ec_order, NULL)) 449 goto end; 450 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL)) 451 goto end; 452 453 if (!ec_p || !ec_a || !ec_b || !ec_gen || 454 !ec_order || !ec_cofactor) 455 goto end; 456 457 len = BN_num_bits(ec_order); 458 459 if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len) 460 buf_len = tmp_len; 461 if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len) 462 buf_len = tmp_len; 463 if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len) 464 buf_len = tmp_len; 465 if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len) 466 buf_len = tmp_len; 467 if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len) 468 buf_len = tmp_len; 469 if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len) 470 buf_len = tmp_len; 471 472 buffer = malloc(buf_len); 473 474 if (buffer == NULL) { 475 perror("malloc"); 476 goto end; 477 } 478 ecparam_print_var(out, ec_p, "ec_p", len, buffer); 479 ecparam_print_var(out, ec_a, "ec_a", len, buffer); 480 ecparam_print_var(out, ec_b, "ec_b", len, buffer); 481 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer); 482 ecparam_print_var(out, ec_order, "ec_order", len, buffer); 483 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, 484 buffer); 485 486 BIO_printf(out, "\n\n"); 487 488 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len); 489 BIO_printf(out, "\tint ok=0;\n"); 490 BIO_printf(out, "\tEC_GROUP *group = NULL;\n"); 491 BIO_printf(out, "\tEC_POINT *point = NULL;\n"); 492 BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, " 493 "*tmp_3 = NULL;\n\n"); 494 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, " 495 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t" 496 "goto err;\n", len, len); 497 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, " 498 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t" 499 "goto err;\n", len, len); 500 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, " 501 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t" 502 "goto err;\n", len, len); 503 if (is_prime) { 504 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_" 505 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)" 506 "\n\t\tgoto err;\n\n"); 507 } else { 508 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_" 509 "GF2m(tmp_1, tmp_2, tmp_3, NULL)) == NULL)" 510 "\n\t\tgoto err;\n\n"); 511 } 512 BIO_printf(out, "\t/* build generator */\n"); 513 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, " 514 "sizeof(ec_gen_%d), tmp_1)) == NULL)" 515 "\n\t\tgoto err;\n", len, len); 516 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, " 517 "NULL, NULL);\n"); 518 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n"); 519 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, " 520 "sizeof(ec_order_%d), tmp_2)) == NULL)" 521 "\n\t\tgoto err;\n", len, len); 522 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, " 523 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)" 524 "\n\t\tgoto err;\n", len, len); 525 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point," 526 " tmp_2, tmp_3))\n\t\tgoto err;\n"); 527 BIO_printf(out, "\n\tok=1;\n"); 528 BIO_printf(out, "err:\n"); 529 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n"); 530 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n"); 531 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n"); 532 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n"); 533 BIO_printf(out, "\tif (!ok)\n"); 534 BIO_printf(out, "\t\t{\n"); 535 BIO_printf(out, "\t\tEC_GROUP_free(group);\n"); 536 BIO_printf(out, "\t\tgroup = NULL;\n"); 537 BIO_printf(out, "\t\t}\n"); 538 BIO_printf(out, "\treturn(group);\n\t}\n"); 539 } 540 if (!ecparam_config.noout) { 541 if (ecparam_config.outformat == FORMAT_ASN1) 542 i = i2d_ECPKParameters_bio(out, group); 543 else if (ecparam_config.outformat == FORMAT_PEM) 544 i = PEM_write_bio_ECPKParameters(out, group); 545 else { 546 BIO_printf(bio_err, "bad output format specified for" 547 " outfile\n"); 548 goto end; 549 } 550 if (!i) { 551 BIO_printf(bio_err, "unable to write elliptic " 552 "curve parameters\n"); 553 ERR_print_errors(bio_err); 554 goto end; 555 } 556 } 557 if (ecparam_config.genkey) { 558 EC_KEY *eckey = EC_KEY_new(); 559 560 if (eckey == NULL) 561 goto end; 562 563 if (EC_KEY_set_group(eckey, group) == 0) { 564 EC_KEY_free(eckey); 565 goto end; 566 } 567 568 if (!EC_KEY_generate_key(eckey)) { 569 EC_KEY_free(eckey); 570 goto end; 571 } 572 if (ecparam_config.outformat == FORMAT_ASN1) 573 i = i2d_ECPrivateKey_bio(out, eckey); 574 else if (ecparam_config.outformat == FORMAT_PEM) 575 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL, 576 NULL, 0, NULL, NULL); 577 else { 578 BIO_printf(bio_err, "bad output format specified " 579 "for outfile\n"); 580 EC_KEY_free(eckey); 581 goto end; 582 } 583 EC_KEY_free(eckey); 584 } 585 ret = 0; 586 587 end: 588 BN_free(ec_p); 589 BN_free(ec_a); 590 BN_free(ec_b); 591 BN_free(ec_gen); 592 BN_free(ec_order); 593 BN_free(ec_cofactor); 594 595 free(buffer); 596 597 BIO_free(in); 598 BIO_free_all(out); 599 EC_GROUP_free(group); 600 601 return (ret); 602 } 603 604 static int 605 ecparam_print_var(BIO * out, BIGNUM * in, const char *var, 606 int len, unsigned char *buffer) 607 { 608 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len); 609 if (BN_is_zero(in)) 610 BIO_printf(out, "\n\t0x00"); 611 else { 612 int i, l; 613 614 l = BN_bn2bin(in, buffer); 615 for (i = 0; i < l - 1; i++) { 616 if ((i % 12) == 0) 617 BIO_printf(out, "\n\t"); 618 BIO_printf(out, "0x%02X,", buffer[i]); 619 } 620 if ((i % 12) == 0) 621 BIO_printf(out, "\n\t"); 622 BIO_printf(out, "0x%02X", buffer[i]); 623 } 624 BIO_printf(out, "\n\t};\n\n"); 625 return 1; 626 } 627 #endif 628