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 /*-
  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 chosen 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
 115 static int ecparam_print_var(BIO *, BIGNUM *, const char *, int,
 116                              unsigned char *);
 117
 118 int MAIN(int, char **);
 119
 120 int 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 chosen 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             nid = EC_curve_nist2nid(curve_name);
 375
 376         if (nid == 0) {
 377             BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
 378             goto end;
 379         }
 380
 381         group = EC_GROUP_new_by_curve_name(nid);
 382         if (group == NULL) {
 383             BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
 384             goto end;
 385         }
 386         EC_GROUP_set_asn1_flag(group, asn1_flag);
 387         EC_GROUP_set_point_conversion_form(group, form);
 388     } else if (informat == FORMAT_ASN1) {
 389         group = d2i_ECPKParameters_bio(in, NULL);
 390     } else if (informat == FORMAT_PEM) {
 391         group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
 392     } else {
 393         BIO_printf(bio_err, "bad input format specified\n");
 394         goto end;
 395     }
 396
 397     if (group == NULL) {
 398         BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
 399         ERR_print_errors(bio_err);
 400         goto end;
 401     }
 402
 403     if (new_form)
 404         EC_GROUP_set_point_conversion_form(group, form);
 405
 406     if (new_asn1_flag)
 407         EC_GROUP_set_asn1_flag(group, asn1_flag);
 408
 409     if (no_seed) {
 410         EC_GROUP_set_seed(group, NULL, 0);
 411     }
 412
 413     if (text) {
 414         if (!ECPKParameters_print(out, group, 0))
 415             goto end;
 416     }
 417
 418     if (check) {
 419         if (group == NULL)
 420             BIO_printf(bio_err, "no elliptic curve parameters\n");
 421         BIO_printf(bio_err, "checking elliptic curve parameters: ");
 422         if (!EC_GROUP_check(group, NULL)) {
 423             BIO_printf(bio_err, "failed\n");
 424             ERR_print_errors(bio_err);
 425         } else
 426             BIO_printf(bio_err, "ok\n");
 427
 428     }
 429
 430     if (C) {
 431         size_t buf_len = 0, tmp_len = 0;
 432         const EC_POINT *point;
 433         int is_prime, len = 0;
 434         const EC_METHOD *meth = EC_GROUP_method_of(group);
 435
 436         if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
 437             (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
 438             (ec_order = BN_new()) == NULL ||
 439             (ec_cofactor = BN_new()) == NULL) {
 440             perror("OPENSSL_malloc");
 441             goto end;
 442         }
 443
 444         is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
 445
 446         if (is_prime) {
 447             if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
 448                 goto end;
 449         } else {
 450             /* TODO */
 451             goto end;
 452         }
 453
 454         if ((point = EC_GROUP_get0_generator(group)) == NULL)
 455             goto end;
 456         if (!EC_POINT_point2bn(group, point,
 457                                EC_GROUP_get_point_conversion_form(group),
 458                                ec_gen, NULL))
 459             goto end;
 460         if (!EC_GROUP_get_order(group, ec_order, NULL))
 461             goto end;
 462         if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
 463             goto end;
 464
 465         if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
 466             goto end;
 467
 468         len = BN_num_bits(ec_order);
 469
 470         if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
 471             buf_len = tmp_len;
 472         if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
 473             buf_len = tmp_len;
 474         if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
 475             buf_len = tmp_len;
 476         if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
 477             buf_len = tmp_len;
 478         if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
 479             buf_len = tmp_len;
 480         if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
 481             buf_len = tmp_len;
 482
 483         buffer = (unsigned char *)OPENSSL_malloc(buf_len);
 484
 485         if (buffer == NULL) {
 486             perror("OPENSSL_malloc");
 487             goto end;
 488         }
 489
 490         ecparam_print_var(out, ec_p, "ec_p", len, buffer);
 491         ecparam_print_var(out, ec_a, "ec_a", len, buffer);
 492         ecparam_print_var(out, ec_b, "ec_b", len, buffer);
 493         ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
 494         ecparam_print_var(out, ec_order, "ec_order", len, buffer);
 495         ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, buffer);
 496
 497         BIO_printf(out, "\n\n");
 498
 499         BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
 500         BIO_printf(out, "\tint ok=0;\n");
 501         BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
 502         BIO_printf(out, "\tEC_POINT *point = NULL;\n");
 503         BIO_printf(out, "\tBIGNUM   *tmp_1 = NULL, *tmp_2 = NULL, "
 504                    "*tmp_3 = NULL;\n\n");
 505         BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
 506                    "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
 507                    "goto err;\n", len, len);
 508         BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
 509                    "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
 510                    "goto err;\n", len, len);
 511         BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
 512                    "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
 513                    "goto err;\n", len, len);
 514         if (is_prime) {
 515             BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
 516                        "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
 517                        "\n\t\tgoto err;\n\n");
 518         } else {
 519             /* TODO */
 520             goto end;
 521         }
 522         BIO_printf(out, "\t/* build generator */\n");
 523         BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
 524                    "sizeof(ec_gen_%d), tmp_1)) == NULL)"
 525                    "\n\t\tgoto err;\n", len, len);
 526         BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
 527                    "NULL, NULL);\n");
 528         BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
 529         BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
 530                    "sizeof(ec_order_%d), tmp_2)) == NULL)"
 531                    "\n\t\tgoto err;\n", len, len);
 532         BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
 533                    "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
 534                    "\n\t\tgoto err;\n", len, len);
 535         BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
 536                    " tmp_2, tmp_3))\n\t\tgoto err;\n");
 537         BIO_printf(out, "\n\tok=1;\n");
 538         BIO_printf(out, "err:\n");
 539         BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
 540         BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
 541         BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
 542         BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
 543         BIO_printf(out, "\tif (!ok)\n");
 544         BIO_printf(out, "\t\t{\n");
 545         BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
 546         BIO_printf(out, "\t\tgroup = NULL;\n");
 547         BIO_printf(out, "\t\t}\n");
 548         BIO_printf(out, "\treturn(group);\n\t}\n");
 549     }
 550
 551     if (!noout) {
 552         if (outformat == FORMAT_ASN1)
 553             i = i2d_ECPKParameters_bio(out, group);
 554         else if (outformat == FORMAT_PEM)
 555             i = PEM_write_bio_ECPKParameters(out, group);
 556         else {
 557             BIO_printf(bio_err, "bad output format specified for"
 558                        " outfile\n");
 559             goto end;
 560         }
 561         if (!i) {
 562             BIO_printf(bio_err, "unable to write elliptic "
 563                        "curve parameters\n");
 564             ERR_print_errors(bio_err);
 565             goto end;
 566         }
 567     }
 568
 569     if (need_rand) {
 570         app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 571         if (inrand != NULL)
 572             BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 573                        app_RAND_load_files(inrand));
 574     }
 575
 576     if (genkey) {
 577         EC_KEY *eckey = EC_KEY_new();
 578
 579         if (eckey == NULL)
 580             goto end;
 581
 582         assert(need_rand);
 583
 584         if (EC_KEY_set_group(eckey, group) == 0)
 585             goto end;
 586
 587         if (!EC_KEY_generate_key(eckey)) {
 588             EC_KEY_free(eckey);
 589             goto end;
 590         }
 591         if (outformat == FORMAT_ASN1)
 592             i = i2d_ECPrivateKey_bio(out, eckey);
 593         else if (outformat == FORMAT_PEM)
 594             i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
 595                                            NULL, 0, NULL, NULL);
 596         else {
 597             BIO_printf(bio_err, "bad output format specified "
 598                        "for outfile\n");
 599             EC_KEY_free(eckey);
 600             goto end;
 601         }
 602         EC_KEY_free(eckey);
 603     }
 604
 605     if (need_rand)
 606         app_RAND_write_file(NULL, bio_err);
 607
 608     ret = 0;
 609  end:
 610     if (ec_p)
 611         BN_free(ec_p);
 612     if (ec_a)
 613         BN_free(ec_a);
 614     if (ec_b)
 615         BN_free(ec_b);
 616     if (ec_gen)
 617         BN_free(ec_gen);
 618     if (ec_order)
 619         BN_free(ec_order);
 620     if (ec_cofactor)
 621         BN_free(ec_cofactor);
 622     if (buffer)
 623         OPENSSL_free(buffer);
 624     BIO_free(in);
 625     BIO_free_all(out);
 626     if (group != NULL)
 627         EC_GROUP_free(group);
 628     apps_shutdown();
 629     OPENSSL_EXIT(ret);
 630 }
 631
 632 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
 633                              int len, unsigned char *buffer)
 634 {
 635     BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
 636     if (BN_is_zero(in))
 637         BIO_printf(out, "\n\t0x00");
 638     else {
 639         int i, l;
 640
 641         l = BN_bn2bin(in, buffer);
 642         for (i = 0; i < l - 1; i++) {
 643             if ((i % 12) == 0)
 644                 BIO_printf(out, "\n\t");
 645             BIO_printf(out, "0x%02X,", buffer[i]);
 646         }
 647         if ((i % 12) == 0)
 648             BIO_printf(out, "\n\t");
 649         BIO_printf(out, "0x%02X", buffer[i]);
 650     }
 651     BIO_printf(out, "\n\t};\n\n");
 652     return 1;
 653 }
 654 #else                           /* !OPENSSL_NO_EC */
 655
 656 # if PEDANTIC
 657 static void *dummy = &dummy;
 658 # endif
 659
 660 #endif