e0a56062d340dc7c756e06c243eb9d41e052ec2c
[openssl.git] / apps / ecparam.c
1 /* apps/ecparam.c */
2 /*
3  * Written by Nils Larsch for the OpenSSL project.
4  */
5 /* ====================================================================
6  * Copyright (c) 1998-2002 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  * In addition, Sun covenants to all licensees who provide a reciprocal
68  * covenant with respect to their own patents if any, not to sue under
69  * current and future patent claims necessarily infringed by the making,
70  * using, practicing, selling, offering for sale and/or otherwise
71  * disposing of the Contribution as delivered hereunder 
72  * (or portions thereof), provided that such covenant shall not apply:
73  *  1) for code that a licensee deletes from the Contribution;
74  *  2) separates from the Contribution; or
75  *  3) for infringements caused by:
76  *       i) the modification of the Contribution or
77  *      ii) the combination of the Contribution with other software or
78  *          devices where such combination causes the infringement.
79  *
80  * The elliptic curve binary polynomial software is originally written by 
81  * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
82  *
83  */
84 #ifndef OPENSSL_NO_EC
85 #include <assert.h>
86 #include <stdio.h>
87 #include <stdlib.h>
88 #include <time.h>
89 #include <string.h>
90 #include "apps.h"
91 #include <openssl/bio.h>
92 #include <openssl/err.h>
93 #include <openssl/bn.h>
94 #include <openssl/ec.h>
95 #include <openssl/x509.h>
96 #include <openssl/pem.h>
97
98 #undef PROG
99 #define PROG    ecparam_main
100
101 /* -inform arg      - input format - default PEM (DER or PEM)
102  * -outform arg     - output format - default PEM
103  * -in  arg         - input file  - default stdin
104  * -out arg         - output file - default stdout
105  * -noout           - do not print the ec parameter
106  * -text            - print the ec parameters in text form
107  * -check           - validate the ec parameters
108  * -C               - print a 'C' function creating the parameters
109  * -name arg        - use the ec parameters with 'short name' name
110  * -list_curves     - prints a list of all currently available curve 'short names'
111  * -conv_form arg   - specifies the point conversion form 
112  *                  - possible values: compressed
113  *                                     uncompressed (default)
114  *                                     hybrid
115  * -param_enc arg   - specifies the way the ec parameters are encoded
116  *                    in the asn1 der encoding
117  *                    possible values: named_curve (default)
118  *                                     explicit
119  * -no_seed         - if 'explicit' parameters are choosen do not use the seed
120  * -genkey          - generate ec key
121  * -rand file       - files to use for random number input
122  * -engine e        - use engine e, possibly a hardware device
123  */
124
125
126 static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
127
128 int MAIN(int, char **);
129
130 int MAIN(int argc, char **argv)
131         {
132         EC_GROUP *group = NULL;
133         point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED; 
134         int     new_form = 0;
135         int     asn1_flag = OPENSSL_EC_NAMED_CURVE;
136         int     new_asn1_flag = 0;
137         char    *curve_name = NULL, *inrand = NULL;
138         int     list_curves = 0, no_seed = 0, check = 0,
139                 badops = 0, text = 0, i, need_rand = 0, genkey = 0;
140         char    *infile = NULL, *outfile = NULL, *prog;
141         BIO     *in = NULL, *out = NULL;
142         int     informat, outformat, noout = 0, C = 0, ret = 1;
143         ENGINE  *e = NULL;
144         char    *engine = NULL;
145
146         BIGNUM  *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
147                 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
148         unsigned char *buffer = NULL;
149
150         apps_startup();
151
152         if (bio_err == NULL)
153                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
154                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
155
156         if (!load_config(bio_err, NULL))
157                 goto end;
158
159         informat=FORMAT_PEM;
160         outformat=FORMAT_PEM;
161
162         prog=argv[0];
163         argc--;
164         argv++;
165         while (argc >= 1)
166                 {
167                 if      (strcmp(*argv,"-inform") == 0)
168                         {
169                         if (--argc < 1) goto bad;
170                         informat=str2fmt(*(++argv));
171                         }
172                 else if (strcmp(*argv,"-outform") == 0)
173                         {
174                         if (--argc < 1) goto bad;
175                         outformat=str2fmt(*(++argv));
176                         }
177                 else if (strcmp(*argv,"-in") == 0)
178                         {
179                         if (--argc < 1) goto bad;
180                         infile= *(++argv);
181                         }
182                 else if (strcmp(*argv,"-out") == 0)
183                         {
184                         if (--argc < 1) goto bad;
185                         outfile= *(++argv);
186                         }
187                 else if (strcmp(*argv,"-text") == 0)
188                         text = 1;
189                 else if (strcmp(*argv,"-C") == 0)
190                         C = 1;
191                 else if (strcmp(*argv,"-check") == 0)
192                         check = 1;
193                 else if (strcmp (*argv, "-name") == 0)
194                         {
195                         if (--argc < 1)
196                                 goto bad;
197                         curve_name = *(++argv);
198                         }
199                 else if (strcmp(*argv, "-list_curves") == 0)
200                         list_curves = 1;
201                 else if (strcmp(*argv, "-conv_form") == 0)
202                         {
203                         if (--argc < 1)
204                                 goto bad;
205                         ++argv;
206                         new_form = 1;
207                         if (strcmp(*argv, "compressed") == 0)
208                                 form = POINT_CONVERSION_COMPRESSED;
209                         else if (strcmp(*argv, "uncompressed") == 0)
210                                 form = POINT_CONVERSION_UNCOMPRESSED;
211                         else if (strcmp(*argv, "hybrid") == 0)
212                                 form = POINT_CONVERSION_HYBRID;
213                         else
214                                 goto bad;
215                         }
216                 else if (strcmp(*argv, "-param_enc") == 0)
217                         {
218                         if (--argc < 1)
219                                 goto bad;
220                         ++argv;
221                         new_asn1_flag = 1;
222                         if (strcmp(*argv, "named_curve") == 0)
223                                 asn1_flag = OPENSSL_EC_NAMED_CURVE;
224                         else if (strcmp(*argv, "explicit") == 0)
225                                 asn1_flag = 0;
226                         else
227                                 goto bad;
228                         }
229                 else if (strcmp(*argv, "-no_seed") == 0)
230                         no_seed = 1;
231                 else if (strcmp(*argv, "-noout") == 0)
232                         noout=1;
233                 else if (strcmp(*argv,"-genkey") == 0)
234                         {
235                         genkey=1;
236                         need_rand=1;
237                         }
238                 else if (strcmp(*argv, "-rand") == 0)
239                         {
240                         if (--argc < 1) goto bad;
241                         inrand= *(++argv);
242                         need_rand=1;
243                         }
244                 else if(strcmp(*argv, "-engine") == 0)
245                         {
246                         if (--argc < 1) goto bad;
247                         engine = *(++argv);
248                         }       
249                 else
250                         {
251                         BIO_printf(bio_err,"unknown option %s\n",*argv);
252                         badops=1;
253                         break;
254                         }
255                 argc--;
256                 argv++;
257                 }
258
259         if (badops)
260                 {
261 bad:
262                 BIO_printf(bio_err, "%s [options] <infile >outfile\n",prog);
263                 BIO_printf(bio_err, "where options are\n");
264                 BIO_printf(bio_err, " -inform arg       input format - "
265                                 "default PEM (DER or PEM)\n");
266                 BIO_printf(bio_err, " -outform arg      output format - "
267                                 "default PEM\n");
268                 BIO_printf(bio_err, " -in  arg          input file  - "
269                                 "default stdin\n");
270                 BIO_printf(bio_err, " -out arg          output file - "
271                                 "default stdout\n");
272                 BIO_printf(bio_err, " -noout            do not print the "
273                                 "ec parameter\n");
274                 BIO_printf(bio_err, " -text             print the ec "
275                                 "parameters in text form\n");
276                 BIO_printf(bio_err, " -check            validate the ec "
277                                 "parameters\n");
278                 BIO_printf(bio_err, " -C                print a 'C' "
279                                 "function creating the parameters\n");
280                 BIO_printf(bio_err, " -name arg         use the "
281                                 "ec parameters with 'short name' name\n");
282                 BIO_printf(bio_err, " -list_curves      prints a list of "
283                                 "all currently available curve 'short names'\n");
284                 BIO_printf(bio_err, " -conv_form arg    specifies the "
285                                 "point conversion form \n");
286                 BIO_printf(bio_err, "                   possible values:"
287                                 " compressed\n");
288                 BIO_printf(bio_err, "                                   "
289                                 " uncompressed (default)\n");
290                 BIO_printf(bio_err, "                                   "
291                                 " hybrid\n");
292                 BIO_printf(bio_err, " -param_enc arg    specifies the way"
293                                 " the ec parameters are encoded\n");
294                 BIO_printf(bio_err, "                   in the asn1 der "
295                                 "encoding\n");
296                 BIO_printf(bio_err, "                   possible values:"
297                                 " named_curve (default)\n");
298                 BIO_printf(bio_err, "                                   "
299                                 " explicit\n");
300                 BIO_printf(bio_err, " -no_seed          if 'explicit'"
301                                 " parameters are choosen do not"
302                                 " use the seed\n");
303                 BIO_printf(bio_err, " -genkey           generate ec"
304                                 " key\n");
305                 BIO_printf(bio_err, " -rand file        files to use for"
306                                 " random number input\n");
307                 BIO_printf(bio_err, " -engine e         use engine e, "
308                                 "possibly a hardware device\n");
309                 goto end;
310                 }
311
312         ERR_load_crypto_strings();
313
314         in=BIO_new(BIO_s_file());
315         out=BIO_new(BIO_s_file());
316         if ((in == NULL) || (out == NULL))
317                 {
318                 ERR_print_errors(bio_err);
319                 goto end;
320                 }
321
322         if (infile == NULL)
323                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
324         else
325                 {
326                 if (BIO_read_filename(in,infile) <= 0)
327                         {
328                         perror(infile);
329                         goto end;
330                         }
331                 }
332         if (outfile == NULL)
333                 {
334                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
335 #ifdef OPENSSL_SYS_VMS
336                 {
337                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
338                 out = BIO_push(tmpbio, out);
339                 }
340 #endif
341                 }
342         else
343                 {
344                 if (BIO_write_filename(out,outfile) <= 0)
345                         {
346                         perror(outfile);
347                         goto end;
348                         }
349                 }
350
351         e = setup_engine(bio_err, engine, 0);
352
353         if (list_curves)
354                 {
355                 int counter=0;
356
357                 for (;;)
358                         {
359                         const char *comment;
360                         const char *sname;
361                         int len, nid = ec_group_index2nid(counter++);
362                         if (!nid)
363                                 break;
364                         comment = EC_GROUP_get0_comment(nid);
365                         sname   = OBJ_nid2sn(nid);
366                         if (comment == NULL)
367                                 comment = "";
368                         if (sname == NULL)
369                                 sname = "";
370
371                         len = BIO_printf(out, "  %-10s: ", sname);
372                         if (len + strlen(comment) > 80)
373                                 BIO_printf(out, "\n%80s\n", comment);
374                         else
375                                 BIO_printf(out, "%s\n", comment);
376                         } 
377
378                 ret = 0;
379                 goto end;
380                 }
381
382         if (curve_name != NULL)
383                 {
384                 int nid = OBJ_sn2nid(curve_name);
385         
386                 if (nid == 0)
387                         {
388                         BIO_printf(bio_err, "unknown curve name (%s)\n", 
389                                 curve_name);
390                         goto end;
391                         }
392
393                 group = EC_GROUP_new_by_nid(nid);
394                 if (group == NULL)
395                         {
396                         BIO_printf(bio_err, "unable to create curve (%s)\n", 
397                                 curve_name);
398                         goto end;
399                         }
400                 EC_GROUP_set_asn1_flag(group, asn1_flag);
401                 EC_GROUP_set_point_conversion_form(group, form);
402                 }
403         else if (informat == FORMAT_ASN1)
404                 {
405                 group = d2i_ECPKParameters_bio(in, NULL);
406                 }
407         else if (informat == FORMAT_PEM)
408                 {
409                 group = PEM_read_bio_ECPKParameters(in,NULL,NULL,NULL);
410                 }
411         else
412                 {
413                 BIO_printf(bio_err, "bad input format specified\n");
414                 goto end;
415                 }
416
417         if (group == NULL)
418                 {
419                 BIO_printf(bio_err, 
420                         "unable to load elliptic curve parameters\n");
421                 ERR_print_errors(bio_err);
422                 goto end;
423                 }
424
425         if (new_form)
426                 EC_GROUP_set_point_conversion_form(group, form);
427
428         if (new_asn1_flag)
429                 EC_GROUP_set_asn1_flag(group, asn1_flag);
430
431         if (no_seed)
432                 {
433                 EC_GROUP_set_seed(group, NULL, 0);
434                 }
435
436         if (text)
437                 {
438                 if (!ECPKParameters_print(out, group, 0))
439                         goto end;
440                 }
441
442         if (check)
443                 {
444                 if (group == NULL)
445                         BIO_printf(bio_err, "no elliptic curve parameters\n");
446                 BIO_printf(bio_err, "checking elliptic curve parameters: ");
447                 if (!EC_GROUP_check(group, NULL))
448                         {
449                         BIO_printf(bio_err, "failed\n");
450                         ERR_print_errors(bio_err);
451                         }
452                 else
453                         BIO_printf(bio_err, "ok\n");
454                         
455                 }
456
457         if (C)
458                 {
459                 size_t  buf_len = 0, tmp_len = 0;
460                 const EC_POINT *point;
461                 int     is_prime, len = 0;
462                 const EC_METHOD *meth = EC_GROUP_method_of(group);
463
464                 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
465                     (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
466                     (ec_order = BN_new()) == NULL || 
467                     (ec_cofactor = BN_new()) == NULL )
468                         {
469                         perror("OPENSSL_malloc");
470                         goto end;
471                         }
472
473                 is_prime = (EC_METHOD_get_field_type(meth) == 
474                         NID_X9_62_prime_field);
475
476                 if (is_prime)
477                         {
478                         if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
479                                 ec_b, NULL))
480                                 goto end;
481                         }
482                 else
483                         {
484                         /* TODO */
485                         goto end;
486                         }
487
488                 if ((point = EC_GROUP_get0_generator(group)) == NULL)
489                         goto end;
490                 if (!EC_POINT_point2bn(group, point, 
491                         EC_GROUP_get_point_conversion_form(group), ec_gen, 
492                         NULL))
493                         goto end;
494                 if (!EC_GROUP_get_order(group, ec_order, NULL))
495                         goto end;
496                 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
497                         goto end;
498
499                 if (!ec_p || !ec_a || !ec_b || !ec_gen || 
500                         !ec_order || !ec_cofactor)
501                         goto end;
502
503                 len = BN_num_bits(ec_order);
504
505                 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
506                         buf_len = tmp_len;
507                 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
508                         buf_len = tmp_len;
509                 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
510                         buf_len = tmp_len;
511                 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
512                         buf_len = tmp_len;
513                 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
514                         buf_len = tmp_len;
515                 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
516                         buf_len = tmp_len;
517
518                 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
519
520                 if (buffer == NULL)
521                         {
522                         perror("OPENSSL_malloc");
523                         goto end;
524                         }
525
526                 ecparam_print_var(out, ec_p, "ec_p", len, buffer);
527                 ecparam_print_var(out, ec_a, "ec_a", len, buffer);
528                 ecparam_print_var(out, ec_b, "ec_b", len, buffer);
529                 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
530                 ecparam_print_var(out, ec_order, "ec_order", len, buffer);
531                 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, 
532                         buffer);
533
534                 BIO_printf(out, "\n\n");
535
536                 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
537                 BIO_printf(out, "\tint ok=0;\n");
538                 BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
539                 BIO_printf(out, "\tEC_POINT *point = NULL;\n");
540                 BIO_printf(out, "\tBIGNUM   *tmp_1 = NULL, *tmp_2 = NULL, "
541                                 "*tmp_3 = NULL;\n\n");
542                 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
543                                 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
544                                 "goto err;\n", len, len);
545                 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
546                                 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
547                                 "goto err;\n", len, len);
548                 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
549                                 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
550                                 "goto err;\n", len, len);
551                 if (is_prime)
552                         {
553                         BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
554                                 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
555                                 "\n\t\tgoto err;\n\n");
556                         }
557                 else
558                         {
559                         /* TODO */
560                         goto end;
561                         }
562                 BIO_printf(out, "\t/* build generator */\n");
563                 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
564                                 "sizeof(ec_gen_%d), tmp_1)) == NULL)"
565                                 "\n\t\tgoto err;\n", len, len);
566                 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
567                                 "NULL, NULL);\n");
568                 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
569                 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
570                                 "sizeof(ec_order_%d), tmp_2)) == NULL)"
571                                 "\n\t\tgoto err;\n", len, len);
572                 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
573                                 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
574                                 "\n\t\tgoto err;\n", len, len);
575                 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
576                                 " tmp_2, tmp_3))\n\t\tgoto err;\n");
577                 BIO_printf(out, "\n\tok=1;\n");
578                 BIO_printf(out, "err:\n");
579                 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
580                 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
581                 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
582                 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
583                 BIO_printf(out, "\tif (!ok)\n");
584                 BIO_printf(out, "\t\t{\n");
585                 BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
586                 BIO_printf(out, "\t\tgroup = NULL;\n");
587                 BIO_printf(out, "\t\t}\n");
588                 BIO_printf(out, "\treturn(group);\n\t}\n");
589         }
590
591         if (!noout)
592                 {
593                 if (outformat == FORMAT_ASN1)
594                         i = i2d_ECPKParameters_bio(out, group);
595                 else if (outformat == FORMAT_PEM)
596                         i = PEM_write_bio_ECPKParameters(out, group);
597                 else    
598                         {
599                         BIO_printf(bio_err,"bad output format specified for"
600                                 " outfile\n");
601                         goto end;
602                         }
603                 if (!i)
604                         {
605                         BIO_printf(bio_err, "unable to write elliptic "
606                                 "curve parameters\n");
607                         ERR_print_errors(bio_err);
608                         goto end;
609                         }
610                 }
611         
612         if (need_rand)
613                 {
614                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
615                 if (inrand != NULL)
616                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
617                                 app_RAND_load_files(inrand));
618                 }
619
620         if (genkey)
621                 {
622                 EC_KEY *eckey = EC_KEY_new();
623
624                 if (eckey == NULL)
625                         goto end;
626
627                 assert(need_rand);
628
629                 eckey->group = group;
630                 
631                 if (!EC_KEY_generate_key(eckey))
632                         {
633                         eckey->group = NULL;
634                         EC_KEY_free(eckey);
635                         goto end;
636                         }
637                 if (outformat == FORMAT_ASN1)
638                         i = i2d_ECPrivateKey_bio(out, eckey);
639                 else if (outformat == FORMAT_PEM)
640                         i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
641                                 NULL, 0, NULL, NULL);
642                 else    
643                         {
644                         BIO_printf(bio_err, "bad output format specified "
645                                 "for outfile\n");
646                         eckey->group = NULL;
647                         EC_KEY_free(eckey);
648                         goto end;
649                         }
650                 eckey->group = NULL;
651                 EC_KEY_free(eckey);
652                 }
653
654         if (need_rand)
655                 app_RAND_write_file(NULL, bio_err);
656
657         ret=0;
658 end:
659         if (ec_p)
660                 BN_free(ec_p);
661         if (ec_a)
662                 BN_free(ec_a);
663         if (ec_b)
664                 BN_free(ec_b);
665         if (ec_gen)
666                 BN_free(ec_gen);
667         if (ec_order)
668                 BN_free(ec_order);
669         if (ec_cofactor)
670                 BN_free(ec_cofactor);
671         if (buffer)
672                 OPENSSL_free(buffer);
673         if (in != NULL)
674                 BIO_free(in);
675         if (out != NULL)
676                 BIO_free_all(out);
677         if (group != NULL)
678                 EC_GROUP_free(group);
679         apps_shutdown();
680         EXIT(ret);
681 }
682
683 int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
684         int len, unsigned char *buffer)
685         {
686         BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
687         if (BN_is_zero(in))
688                 BIO_printf(out, "\n\t0x00");
689         else 
690                 {
691                 int i, l;
692
693                 l = BN_bn2bin(in, buffer);
694                 for (i=0; i<l-1; i++)
695                         {
696                         if ((i%12) == 0) 
697                                 BIO_printf(out, "\n\t");
698                         BIO_printf(out, "0x%02X,", buffer[i]);
699                         }
700                 if ((i%12) == 0) 
701                         BIO_printf(out, "\n\t");
702                 BIO_printf(out, "0x%02X", buffer[i]);
703                 }
704         BIO_printf(out, "\n\t};\n\n");
705         return 1;
706         }
707 #endif