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
115static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
116
117int MAIN(int, char **);
118
119int 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		{
249bad:
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;
676end:
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
701static 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
728static void *dummy=&dummy;
729# endif
730
731#endif
732