apps/ecparam.c

   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 /* -inform arg      - input format - default PEM (DER or PEM)
  91  * -outform arg     - output format - default PEM
  92  * -in  arg         - input file  - default stdin
  93  * -out arg         - output file - default stdout
  94  * -noout           - do not print the ec parameter
  95  * -text            - print the ec parameters in text form
  96  * -check           - validate the ec parameters
  97  * -C               - print a 'C' function creating the parameters
  98  * -name arg        - use the ec parameters with 'short name' name
  99  * -list_curves     - prints a list of all currently available curve 'short names'
 100  * -conv_form arg   - specifies the point conversion form
 101  *                  - possible values: compressed
 102  *                                     uncompressed (default)
 103  *                                     hybrid
 104  * -param_enc arg   - specifies the way the ec parameters are encoded
 105  *                    in the asn1 der encoding
 106  *                    possible values: named_curve (default)
 107  *                                     explicit
 108  * -no_seed         - if 'explicit' parameters are choosen do not use the seed
 109  * -genkey          - generate ec key
 110  * -rand file       - files to use for random number input
 111  * -engine e        - use engine e, possibly a hardware device
 112  */
 113
 114
 115 static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
 116
 117 int MAIN(int, char **);
 118
 119 int MAIN(int argc, char **argv)
 120         {
 121         EC_GROUP *group = NULL;
 122         point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
 123         int     new_form = 0;
 124         int     asn1_flag = OPENSSL_EC_NAMED_CURVE;
 125         int     new_asn1_flag = 0;
 126         char    *curve_name = NULL, *inrand = NULL;
 127         int     list_curves = 0, no_seed = 0, check = 0,
 128                 badops = 0, text = 0, i, need_rand = 0, genkey = 0;
 129         char    *infile = NULL, *outfile = NULL, *prog;
 130         BIO     *in = NULL, *out = NULL;
 131         int     informat, outformat, noout = 0, C = 0, ret = 1;
 132         char    *engine = NULL;
 133
 134         BIGNUM  *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
 135                 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
 136         unsigned char *buffer = NULL;
 137
 138         apps_startup();
 139
 140         if (bio_err == NULL)
 141                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 142                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 143
 144         if (!load_config(bio_err, NULL))
 145                 goto end;
 146
 147         informat=FORMAT_PEM;
 148         outformat=FORMAT_PEM;
 149
 150         prog=argv[0];
 151         argc--;
 152         argv++;
 153         while (argc >= 1)
 154                 {
 155                 if      (strcmp(*argv,"-inform") == 0)
 156                         {
 157                         if (--argc < 1) goto bad;
 158                         informat=str2fmt(*(++argv));
 159                         }
 160                 else if (strcmp(*argv,"-outform") == 0)
 161                         {
 162                         if (--argc < 1) goto bad;
 163                         outformat=str2fmt(*(++argv));
 164                         }
 165                 else if (strcmp(*argv,"-in") == 0)
 166                         {
 167                         if (--argc < 1) goto bad;
 168                         infile= *(++argv);
 169                         }
 170                 else if (strcmp(*argv,"-out") == 0)
 171                         {
 172                         if (--argc < 1) goto bad;
 173                         outfile= *(++argv);
 174                         }
 175                 else if (strcmp(*argv,"-text") == 0)
 176                         text = 1;
 177                 else if (strcmp(*argv,"-C") == 0)
 178                         C = 1;
 179                 else if (strcmp(*argv,"-check") == 0)
 180                         check = 1;
 181                 else if (strcmp (*argv, "-name") == 0)
 182                         {
 183                         if (--argc < 1)
 184                                 goto bad;
 185                         curve_name = *(++argv);
 186                         }
 187                 else if (strcmp(*argv, "-list_curves") == 0)
 188                         list_curves = 1;
 189                 else if (strcmp(*argv, "-conv_form") == 0)
 190                         {
 191                         if (--argc < 1)
 192                                 goto bad;
 193                         ++argv;
 194                         new_form = 1;
 195                         if (strcmp(*argv, "compressed") == 0)
 196                                 form = POINT_CONVERSION_COMPRESSED;
 197                         else if (strcmp(*argv, "uncompressed") == 0)
 198                                 form = POINT_CONVERSION_UNCOMPRESSED;
 199                         else if (strcmp(*argv, "hybrid") == 0)
 200                                 form = POINT_CONVERSION_HYBRID;
 201                         else
 202                                 goto bad;
 203                         }
 204                 else if (strcmp(*argv, "-param_enc") == 0)
 205                         {
 206                         if (--argc < 1)
 207                                 goto bad;
 208                         ++argv;
 209                         new_asn1_flag = 1;
 210                         if (strcmp(*argv, "named_curve") == 0)
 211                                 asn1_flag = OPENSSL_EC_NAMED_CURVE;
 212                         else if (strcmp(*argv, "explicit") == 0)
 213                                 asn1_flag = 0;
 214                         else
 215                                 goto bad;
 216                         }
 217                 else if (strcmp(*argv, "-no_seed") == 0)
 218                         no_seed = 1;
 219                 else if (strcmp(*argv, "-noout") == 0)
 220                         noout=1;
 221                 else if (strcmp(*argv,"-genkey") == 0)
 222                         {
 223                         genkey=1;
 224                         need_rand=1;
 225                         }
 226                 else if (strcmp(*argv, "-rand") == 0)
 227                         {
 228                         if (--argc < 1) goto bad;
 229                         inrand= *(++argv);
 230                         need_rand=1;
 231                         }
 232                 else if(strcmp(*argv, "-engine") == 0)
 233                         {
 234                         if (--argc < 1) goto bad;
 235                         engine = *(++argv);
 236                         }
 237                 else
 238                         {
 239                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 240                         badops=1;
 241                         break;
 242                         }
 243                 argc--;
 244                 argv++;
 245                 }
 246
 247         if (badops)
 248                 {
 249 bad:
 250                 BIO_printf(bio_err, "%s [options] <infile >outfile\n",prog);
 251                 BIO_printf(bio_err, "where options are\n");
 252                 BIO_printf(bio_err, " -inform arg       input format - "
 253                                 "default PEM (DER or PEM)\n");
 254                 BIO_printf(bio_err, " -outform arg      output format - "
 255                                 "default PEM\n");
 256                 BIO_printf(bio_err, " -in  arg          input file  - "
 257                                 "default stdin\n");
 258                 BIO_printf(bio_err, " -out arg          output file - "
 259                                 "default stdout\n");
 260                 BIO_printf(bio_err, " -noout            do not print the "
 261                                 "ec parameter\n");
 262                 BIO_printf(bio_err, " -text             print the ec "
 263                                 "parameters in text form\n");
 264                 BIO_printf(bio_err, " -check            validate the ec "
 265                                 "parameters\n");
 266                 BIO_printf(bio_err, " -C                print a 'C' "
 267                                 "function creating the parameters\n");
 268                 BIO_printf(bio_err, " -name arg         use the "
 269                                 "ec parameters with 'short name' name\n");
 270                 BIO_printf(bio_err, " -list_curves      prints a list of "
 271                                 "all currently available curve 'short names'\n");
 272                 BIO_printf(bio_err, " -conv_form arg    specifies the "
 273                                 "point conversion form \n");
 274                 BIO_printf(bio_err, "                   possible values:"
 275                                 " compressed\n");
 276                 BIO_printf(bio_err, "                                   "
 277                                 " uncompressed (default)\n");
 278                 BIO_printf(bio_err, "                                   "
 279                                 " hybrid\n");
 280                 BIO_printf(bio_err, " -param_enc arg    specifies the way"
 281                                 " the ec parameters are encoded\n");
 282                 BIO_printf(bio_err, "                   in the asn1 der "
 283                                 "encoding\n");
 284                 BIO_printf(bio_err, "                   possible values:"
 285                                 " named_curve (default)\n");
 286                 BIO_printf(bio_err, "                                   "
 287                                 " explicit\n");
 288                 BIO_printf(bio_err, " -no_seed          if 'explicit'"
 289                                 " parameters are choosen do not"
 290                                 " use the seed\n");
 291                 BIO_printf(bio_err, " -genkey           generate ec"
 292                                 " key\n");
 293                 BIO_printf(bio_err, " -rand file        files to use for"
 294                                 " random number input\n");
 295                 BIO_printf(bio_err, " -engine e         use engine e, "
 296                                 "possibly a hardware device\n");
 297                 goto end;
 298                 }
 299
 300         ERR_load_crypto_strings();
 301
 302         in=BIO_new(BIO_s_file());
 303         out=BIO_new(BIO_s_file());
 304         if ((in == NULL) || (out == NULL))
 305                 {
 306                 ERR_print_errors(bio_err);
 307                 goto end;
 308                 }
 309
 310         if (infile == NULL)
 311                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 312         else
 313                 {
 314                 if (BIO_read_filename(in,infile) <= 0)
 315                         {
 316                         perror(infile);
 317                         goto end;
 318                         }
 319                 }
 320         if (outfile == NULL)
 321                 {
 322                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 323 #ifdef OPENSSL_SYS_VMS
 324                 {
 325                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 326                 out = BIO_push(tmpbio, out);
 327                 }
 328 #endif
 329                 }
 330         else
 331                 {
 332                 if (BIO_write_filename(out,outfile) <= 0)
 333                         {
 334                         perror(outfile);
 335                         goto end;
 336                         }
 337                 }
 338
 339 #ifndef OPENSSL_NO_ENGINE
 340         setup_engine(bio_err, engine, 0);
 341 #endif
 342
 343         if (list_curves)
 344                 {
 345                 EC_builtin_curve *curves = NULL;
 346                 size_t crv_len = 0;
 347                 size_t n = 0;
 348
 349                 crv_len = EC_get_builtin_curves(NULL, 0);
 350
 351                 curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));
 352
 353                 if (curves == NULL)
 354                         goto end;
 355
 356                 if (!EC_get_builtin_curves(curves, crv_len))
 357                         {
 358                         OPENSSL_free(curves);
 359                         goto end;
 360                         }
 361
 362
 363                 for (n = 0; n < crv_len; n++)
 364                         {
 365                         const char *comment;
 366                         const char *sname;
 367                         comment = curves[n].comment;
 368                         sname   = OBJ_nid2sn(curves[n].nid);
 369                         if (comment == NULL)
 370                                 comment = "CURVE DESCRIPTION NOT AVAILABLE";
 371                         if (sname == NULL)
 372                                 sname = "";
 373
 374                         BIO_printf(out, "  %-10s: ", sname);
 375                         BIO_printf(out, "%s\n", comment);
 376                         }
 377
 378                 OPENSSL_free(curves);
 379                 ret = 0;
 380                 goto end;
 381                 }
 382
 383         if (curve_name != NULL)
 384                 {
 385                 int nid;
 386
 387                 /* workaround for the SECG curve names secp192r1
 388                  * and secp256r1 (which are the same as the curves
 389                  * prime192v1 and prime256v1 defined in X9.62)
 390                  */
 391                 if (!strcmp(curve_name, "secp192r1"))
 392                         {
 393                         BIO_printf(bio_err, "using curve name prime192v1 "
 394                                 "instead of secp192r1\n");
 395                         nid = NID_X9_62_prime192v1;
 396                         }
 397                 else if (!strcmp(curve_name, "secp256r1"))
 398                         {
 399                         BIO_printf(bio_err, "using curve name prime256v1 "
 400                                 "instead of secp256r1\n");
 401                         nid = NID_X9_62_prime256v1;
 402                         }
 403                 else
 404                         nid = OBJ_sn2nid(curve_name);
 405
 406                 if (nid == 0)
 407                         {
 408                         BIO_printf(bio_err, "unknown curve name (%s)\n",
 409                                 curve_name);
 410                         goto end;
 411                         }
 412
 413                 group = EC_GROUP_new_by_curve_name(nid);
 414                 if (group == NULL)
 415                         {
 416                         BIO_printf(bio_err, "unable to create curve (%s)\n",
 417                                 curve_name);
 418                         goto end;
 419                         }
 420                 EC_GROUP_set_asn1_flag(group, asn1_flag);
 421                 EC_GROUP_set_point_conversion_form(group, form);
 422                 }
 423         else if (informat == FORMAT_ASN1)
 424                 {
 425                 group = d2i_ECPKParameters_bio(in, NULL);
 426                 }
 427         else if (informat == FORMAT_PEM)
 428                 {
 429                 group = PEM_read_bio_ECPKParameters(in,NULL,NULL,NULL);
 430                 }
 431         else
 432                 {
 433                 BIO_printf(bio_err, "bad input format specified\n");
 434                 goto end;
 435                 }
 436
 437         if (group == NULL)
 438                 {
 439                 BIO_printf(bio_err,
 440                         "unable to load elliptic curve parameters\n");
 441                 ERR_print_errors(bio_err);
 442                 goto end;
 443                 }
 444
 445         if (new_form)
 446                 EC_GROUP_set_point_conversion_form(group, form);
 447
 448         if (new_asn1_flag)
 449                 EC_GROUP_set_asn1_flag(group, asn1_flag);
 450
 451         if (no_seed)
 452                 {
 453                 EC_GROUP_set_seed(group, NULL, 0);
 454                 }
 455
 456         if (text)
 457                 {
 458                 if (!ECPKParameters_print(out, group, 0))
 459                         goto end;
 460                 }
 461
 462         if (check)
 463                 {
 464                 if (group == NULL)
 465                         BIO_printf(bio_err, "no elliptic curve parameters\n");
 466                 BIO_printf(bio_err, "checking elliptic curve parameters: ");
 467                 if (!EC_GROUP_check(group, NULL))
 468                         {
 469                         BIO_printf(bio_err, "failed\n");
 470                         ERR_print_errors(bio_err);
 471                         }
 472                 else
 473                         BIO_printf(bio_err, "ok\n");
 474
 475                 }
 476
 477         if (C)
 478                 {
 479                 size_t  buf_len = 0, tmp_len = 0;
 480                 const EC_POINT *point;
 481                 int     is_prime, len = 0;
 482                 const EC_METHOD *meth = EC_GROUP_method_of(group);
 483
 484                 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
 485                     (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
 486                     (ec_order = BN_new()) == NULL ||
 487                     (ec_cofactor = BN_new()) == NULL )
 488                         {
 489                         perror("OPENSSL_malloc");
 490                         goto end;
 491                         }
 492
 493                 is_prime = (EC_METHOD_get_field_type(meth) ==
 494                         NID_X9_62_prime_field);
 495
 496                 if (is_prime)
 497                         {
 498                         if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
 499                                 ec_b, NULL))
 500                                 goto end;
 501                         }
 502                 else
 503                         {
 504                         /* TODO */
 505                         goto end;
 506                         }
 507
 508                 if ((point = EC_GROUP_get0_generator(group)) == NULL)
 509                         goto end;
 510                 if (!EC_POINT_point2bn(group, point,
 511                         EC_GROUP_get_point_conversion_form(group), ec_gen,
 512                         NULL))
 513                         goto end;
 514                 if (!EC_GROUP_get_order(group, ec_order, NULL))
 515                         goto end;
 516                 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
 517                         goto end;
 518
 519                 if (!ec_p || !ec_a || !ec_b || !ec_gen ||
 520                         !ec_order || !ec_cofactor)
 521                         goto end;
 522
 523                 len = BN_num_bits(ec_order);
 524
 525                 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
 526                         buf_len = tmp_len;
 527                 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
 528                         buf_len = tmp_len;
 529                 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
 530                         buf_len = tmp_len;
 531                 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
 532                         buf_len = tmp_len;
 533                 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
 534                         buf_len = tmp_len;
 535                 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
 536                         buf_len = tmp_len;
 537
 538                 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
 539
 540                 if (buffer == NULL)
 541                         {
 542                         perror("OPENSSL_malloc");
 543                         goto end;
 544                         }
 545
 546                 ecparam_print_var(out, ec_p, "ec_p", len, buffer);
 547                 ecparam_print_var(out, ec_a, "ec_a", len, buffer);
 548                 ecparam_print_var(out, ec_b, "ec_b", len, buffer);
 549                 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
 550                 ecparam_print_var(out, ec_order, "ec_order", len, buffer);
 551                 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
 552                         buffer);
 553
 554                 BIO_printf(out, "\n\n");
 555
 556                 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
 557                 BIO_printf(out, "\tint ok=0;\n");
 558                 BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
 559                 BIO_printf(out, "\tEC_POINT *point = NULL;\n");
 560                 BIO_printf(out, "\tBIGNUM   *tmp_1 = NULL, *tmp_2 = NULL, "
 561                                 "*tmp_3 = NULL;\n\n");
 562                 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
 563                                 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
 564                                 "goto err;\n", len, len);
 565                 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
 566                                 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
 567                                 "goto err;\n", len, len);
 568                 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
 569                                 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
 570                                 "goto err;\n", len, len);
 571                 if (is_prime)
 572                         {
 573                         BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
 574                                 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
 575                                 "\n\t\tgoto err;\n\n");
 576                         }
 577                 else
 578                         {
 579                         /* TODO */
 580                         goto end;
 581                         }
 582                 BIO_printf(out, "\t/* build generator */\n");
 583                 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
 584                                 "sizeof(ec_gen_%d), tmp_1)) == NULL)"
 585                                 "\n\t\tgoto err;\n", len, len);
 586                 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
 587                                 "NULL, NULL);\n");
 588                 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
 589                 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
 590                                 "sizeof(ec_order_%d), tmp_2)) == NULL)"
 591                                 "\n\t\tgoto err;\n", len, len);
 592                 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
 593                                 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
 594                                 "\n\t\tgoto err;\n", len, len);
 595                 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
 596                                 " tmp_2, tmp_3))\n\t\tgoto err;\n");
 597                 BIO_printf(out, "\n\tok=1;\n");
 598                 BIO_printf(out, "err:\n");
 599                 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
 600                 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
 601                 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
 602                 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
 603                 BIO_printf(out, "\tif (!ok)\n");
 604                 BIO_printf(out, "\t\t{\n");
 605                 BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
 606                 BIO_printf(out, "\t\tgroup = NULL;\n");
 607                 BIO_printf(out, "\t\t}\n");
 608                 BIO_printf(out, "\treturn(group);\n\t}\n");
 609         }
 610
 611         if (!noout)
 612                 {
 613                 if (outformat == FORMAT_ASN1)
 614                         i = i2d_ECPKParameters_bio(out, group);
 615                 else if (outformat == FORMAT_PEM)
 616                         i = PEM_write_bio_ECPKParameters(out, group);
 617                 else
 618                         {
 619                         BIO_printf(bio_err,"bad output format specified for"
 620                                 " outfile\n");
 621                         goto end;
 622                         }
 623                 if (!i)
 624                         {
 625                         BIO_printf(bio_err, "unable to write elliptic "
 626                                 "curve parameters\n");
 627                         ERR_print_errors(bio_err);
 628                         goto end;
 629                         }
 630                 }
 631
 632         if (need_rand)
 633                 {
 634                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 635                 if (inrand != NULL)
 636                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 637                                 app_RAND_load_files(inrand));
 638                 }
 639
 640         if (genkey)
 641                 {
 642                 EC_KEY *eckey = EC_KEY_new();
 643
 644                 if (eckey == NULL)
 645                         goto end;
 646
 647                 assert(need_rand);
 648
 649                 if (EC_KEY_set_group(eckey, group) == 0)
 650                         goto end;
 651
 652                 if (!EC_KEY_generate_key(eckey))
 653                         {
 654                         EC_KEY_free(eckey);
 655                         goto end;
 656                         }
 657                 if (outformat == FORMAT_ASN1)
 658                         i = i2d_ECPrivateKey_bio(out, eckey);
 659                 else if (outformat == FORMAT_PEM)
 660                         i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
 661                                 NULL, 0, NULL, NULL);
 662                 else
 663                         {
 664                         BIO_printf(bio_err, "bad output format specified "
 665                                 "for outfile\n");
 666                         EC_KEY_free(eckey);
 667                         goto end;
 668                         }
 669                 EC_KEY_free(eckey);
 670                 }
 671
 672         if (need_rand)
 673                 app_RAND_write_file(NULL, bio_err);
 674
 675         ret=0;
 676 end:
 677         if (ec_p)
 678                 BN_free(ec_p);
 679         if (ec_a)
 680                 BN_free(ec_a);
 681         if (ec_b)
 682                 BN_free(ec_b);
 683         if (ec_gen)
 684                 BN_free(ec_gen);
 685         if (ec_order)
 686                 BN_free(ec_order);
 687         if (ec_cofactor)
 688                 BN_free(ec_cofactor);
 689         if (buffer)
 690                 OPENSSL_free(buffer);
 691         if (in != NULL)
 692                 BIO_free(in);
 693         if (out != NULL)
 694                 BIO_free_all(out);
 695         if (group != NULL)
 696                 EC_GROUP_free(group);
 697         apps_shutdown();
 698         OPENSSL_EXIT(ret);
 699 }
 700
 701 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
 702         int len, unsigned char *buffer)
 703         {
 704         BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
 705         if (BN_is_zero(in))
 706                 BIO_printf(out, "\n\t0x00");
 707         else
 708                 {
 709                 int i, l;
 710
 711                 l = BN_bn2bin(in, buffer);
 712                 for (i=0; i<l-1; i++)
 713                         {
 714                         if ((i%12) == 0)
 715                                 BIO_printf(out, "\n\t");
 716                         BIO_printf(out, "0x%02X,", buffer[i]);
 717                         }
 718                 if ((i%12) == 0)
 719                         BIO_printf(out, "\n\t");
 720                 BIO_printf(out, "0x%02X", buffer[i]);
 721                 }
 722         BIO_printf(out, "\n\t};\n\n");
 723         return 1;
 724         }
 725 #else /* !OPENSSL_NO_EC */
 726
 727 # if PEDANTIC
 728 static void *dummy=&dummy;
 729 # endif
 730
 731 #endif