ecparam.c

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/* apps/ecparam.c */
/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([e-mail]).  This product includes software written by Tim
 * Hudson ([e-mail]).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * Portions of the attached software ("Contribution") are developed by 
 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 *
 * The Contribution is licensed pursuant to the OpenSSL open source
 * license provided above.
 *
 * The elliptic curve binary polynomial software is originally written by 
 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
 *
 */

#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_EC
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/x509.h>
#include <openssl/pem.h>

#undef PROG
#define PROG	ecparam_main

/* -inform arg      - input format - default PEM (DER or PEM)
 * -outform arg     - output format - default PEM
 * -in  arg         - input file  - default stdin
 * -out arg         - output file - default stdout
 * -noout           - do not print the ec parameter
 * -text            - print the ec parameters in text form
 * -check           - validate the ec parameters
 * -C               - print a 'C' function creating the parameters
 * -name arg        - use the ec parameters with 'short name' name
 * -list_curves     - prints a list of all currently available curve 'short names'
 * -conv_form arg   - specifies the point conversion form 
 *                  - possible values: compressed
 *                                     uncompressed (default)
 *                                     hybrid
 * -param_enc arg   - specifies the way the ec parameters are encoded
 *                    in the asn1 der encoding
 *                    possible values: named_curve (default)
 *                                     explicit
 * -no_seed         - if 'explicit' parameters are choosen do not use the seed
 * -genkey          - generate ec key
 * -rand file       - files to use for random number input
 * -engine e        - use engine e, possibly a hardware device
 */


static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);

int MAIN(int, char **);

int MAIN(int argc, char **argv)
	{
	EC_GROUP *group = NULL;
	point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED; 
	int 	new_form = 0;
	int 	asn1_flag = OPENSSL_EC_NAMED_CURVE;
	int 	new_asn1_flag = 0;
	char 	*curve_name = NULL, *inrand = NULL;
	int	list_curves = 0, no_seed = 0, check = 0,
		badops = 0, text = 0, i, need_rand = 0, genkey = 0;
	char	*infile = NULL, *outfile = NULL, *prog;
	BIO 	*in = NULL, *out = NULL;
	int 	informat, outformat, noout = 0, C = 0, ret = 1;
#ifndef OPENSSL_NO_ENGINE
	ENGINE	*e = NULL;
#endif
	char	*engine = NULL;

	BIGNUM	*ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
		*ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
	unsigned char *buffer = NULL;

	apps_startup();

	if (bio_err == NULL)
		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

	if (!load_config(bio_err, NULL))
		goto end;

	informat=FORMAT_PEM;
	outformat=FORMAT_PEM;

	prog=argv[0];
	argc--;
	argv++;
	while (argc >= 1)
		{
		if 	(strcmp(*argv,"-inform") == 0)
			{
			if (--argc < 1) goto bad;
			informat=str2fmt(*(++argv));
			}
		else if (strcmp(*argv,"-outform") == 0)
			{
			if (--argc < 1) goto bad;
			outformat=str2fmt(*(++argv));
			}
		else if (strcmp(*argv,"-in") == 0)
			{
			if (--argc < 1) goto bad;
			infile= *(++argv);
			}
		else if (strcmp(*argv,"-out") == 0)
			{
			if (--argc < 1) goto bad;
			outfile= *(++argv);
			}
		else if (strcmp(*argv,"-text") == 0)
			text = 1;
		else if (strcmp(*argv,"-C") == 0)
			C = 1;
		else if (strcmp(*argv,"-check") == 0)
			check = 1;
		else if (strcmp (*argv, "-name") == 0)
			{
			if (--argc < 1)
				goto bad;
			curve_name = *(++argv);
			}
		else if (strcmp(*argv, "-list_curves") == 0)
			list_curves = 1;
		else if (strcmp(*argv, "-conv_form") == 0)
			{
			if (--argc < 1)
				goto bad;
			++argv;
			new_form = 1;
			if (strcmp(*argv, "compressed") == 0)
				form = POINT_CONVERSION_COMPRESSED;
			else if (strcmp(*argv, "uncompressed") == 0)
				form = POINT_CONVERSION_UNCOMPRESSED;
			else if (strcmp(*argv, "hybrid") == 0)
				form = POINT_CONVERSION_HYBRID;
			else
				goto bad;
			}
		else if (strcmp(*argv, "-param_enc") == 0)
			{
			if (--argc < 1)
				goto bad;
			++argv;
			new_asn1_flag = 1;
			if (strcmp(*argv, "named_curve") == 0)
				asn1_flag = OPENSSL_EC_NAMED_CURVE;
			else if (strcmp(*argv, "explicit") == 0)
				asn1_flag = 0;
			else
				goto bad;
			}
		else if (strcmp(*argv, "-no_seed") == 0)
			no_seed = 1;
		else if (strcmp(*argv, "-noout") == 0)
			noout=1;
		else if (strcmp(*argv,"-genkey") == 0)
			{
			genkey=1;
			need_rand=1;
			}
		else if (strcmp(*argv, "-rand") == 0)
			{
			if (--argc < 1) goto bad;
			inrand= *(++argv);
			need_rand=1;
			}
		else if(strcmp(*argv, "-engine") == 0)
			{
			if (--argc < 1) goto bad;
			engine = *(++argv);
			}	
		else
			{
			BIO_printf(bio_err,"unknown option %s\n",*argv);
			badops=1;
			break;
			}
		argc--;
		argv++;
		}

	if (badops)
		{
bad:
		BIO_printf(bio_err, "%s [options] <infile >outfile\n",prog);
		BIO_printf(bio_err, "where options are\n");
		BIO_printf(bio_err, " -inform arg       input format - "
				"default PEM (DER or PEM)\n");
		BIO_printf(bio_err, " -outform arg      output format - "
				"default PEM\n");
		BIO_printf(bio_err, " -in  arg          input file  - "
				"default stdin\n");
		BIO_printf(bio_err, " -out arg          output file - "
				"default stdout\n");
		BIO_printf(bio_err, " -noout            do not print the "
				"ec parameter\n");
		BIO_printf(bio_err, " -text             print the ec "
				"parameters in text form\n");
		BIO_printf(bio_err, " -check            validate the ec "
				"parameters\n");
		BIO_printf(bio_err, " -C                print a 'C' "
				"function creating the parameters\n");
		BIO_printf(bio_err, " -name arg         use the "
				"ec parameters with 'short name' name\n");
		BIO_printf(bio_err, " -list_curves      prints a list of "
				"all currently available curve 'short names'\n");
		BIO_printf(bio_err, " -conv_form arg    specifies the "
				"point conversion form \n");
		BIO_printf(bio_err, "                   possible values:"
				" compressed\n");
		BIO_printf(bio_err, "                                   "
				" uncompressed (default)\n");
		BIO_printf(bio_err, "                                   "
				" hybrid\n");
		BIO_printf(bio_err, " -param_enc arg    specifies the way"
				" the ec parameters are encoded\n");
		BIO_printf(bio_err, "                   in the asn1 der "
				"encoding\n");
		BIO_printf(bio_err, "                   possible values:"
				" named_curve (default)\n");
		BIO_printf(bio_err, "                                   "
				" explicit\n");
		BIO_printf(bio_err, " -no_seed          if 'explicit'"
				" parameters are choosen do not"
				" use the seed\n");
		BIO_printf(bio_err, " -genkey           generate ec"
				" key\n");
		BIO_printf(bio_err, " -rand file        files to use for"
				" random number input\n");
		BIO_printf(bio_err, " -engine e         use engine e, "
				"possibly a hardware device\n");
		goto end;
		}

	ERR_load_crypto_strings();

	in=BIO_new(BIO_s_file());
	out=BIO_new(BIO_s_file());
	if ((in == NULL) || (out == NULL))
		{
		ERR_print_errors(bio_err);
		goto end;
		}

	if (infile == NULL)
		BIO_set_fp(in,stdin,BIO_NOCLOSE);
	else
		{
		if (BIO_read_filename(in,infile) <= 0)
			{
			perror(infile);
			goto end;
			}
		}
	if (outfile == NULL)
		{
		BIO_set_fp(out,stdout,BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
		{
		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
		out = BIO_push(tmpbio, out);
		}
#endif
		}
	else
		{
		if (BIO_write_filename(out,outfile) <= 0)
			{
			perror(outfile);
			goto end;
			}
		}

#ifndef OPENSSL_NO_ENGINE
	e = setup_engine(bio_err, engine, 0);
#endif

	if (list_curves)
		{
		EC_builtin_curve *curves = NULL;
		size_t crv_len = 0;
		size_t n = 0;

		crv_len = EC_get_builtin_curves(NULL, 0);

		curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));

		if (curves == NULL)
			goto end;

		if (!EC_get_builtin_curves(curves, crv_len))
			{
			OPENSSL_free(curves);
			goto end;
			}