/* $OpenBSD$ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2006
 */
/* ====================================================================
 * Copyright (c) 2006 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
 *    licensing@OpenSSL.org.
 *
 * 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
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <string.h>

#include "apps.h"

#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>

int pkeyparam_main(int, char **);

int 
pkeyparam_main(int argc, char **argv)
{
	char **args, *infile = NULL, *outfile = NULL;
	BIO *in = NULL, *out = NULL;
	int text = 0, noout = 0;
	EVP_PKEY *pkey = NULL;
	int badarg = 0;
#ifndef OPENSSL_NO_ENGINE
	char *engine = NULL;
#endif
	int ret = 1;

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

	ERR_load_crypto_strings();
	OpenSSL_add_all_algorithms();
	args = argv + 1;
	while (!badarg && *args && *args[0] == '-') {
		if (!strcmp(*args, "-in")) {
			if (args[1]) {
				args++;
				infile = *args;
			} else
				badarg = 1;
		} else if (!strcmp(*args, "-out")) {
			if (args[1]) {
				args++;
				outfile = *args;
			} else
				badarg = 1;
		}
#ifndef OPENSSL_NO_ENGINE
		else if (strcmp(*args, "-engine") == 0) {
			if (!args[1])
				goto bad;
			engine = *(++args);
		}
#endif

		else if (strcmp(*args, "-text") == 0)
			text = 1;
		else if (strcmp(*args, "-noout") == 0)
			noout = 1;
		args++;
	}

	if (badarg) {
#ifndef OPENSSL_NO_ENGINE
bad:
#endif
		BIO_printf(bio_err, "Usage pkeyparam [options]\n");
		BIO_printf(bio_err, "where options are\n");
		BIO_printf(bio_err, "-in file        input file\n");
		BIO_printf(bio_err, "-out file       output file\n");
		BIO_printf(bio_err, "-text           print parameters as text\n");
		BIO_printf(bio_err, "-noout          don't output encoded parameters\n");
#ifndef OPENSSL_NO_ENGINE
		BIO_printf(bio_err, "-engine e       use engine e, possibly a hardware device.\n");
#endif
		return 1;
	}
#ifndef OPENSSL_NO_ENGINE
	setup_engine(bio_err, engine, 0);
#endif

	if (infile) {
		if (!(in = BIO_new_file(infile, "r"))) {
			BIO_printf(bio_err,
			    "Can't open input file %s\n", infile);
			goto end;
		}
	} else
		in = BIO_new_fp(stdin, BIO_NOCLOSE);

	if (outfile) {
		if (!(out = BIO_new_file(outfile, "w"))) {
			BIO_printf(bio_err,
			    "Can't open output file %s\n", outfile);
			goto end;
		}
	} else {
		out = BIO_new_fp(stdout, BIO_NOCLOSE);
	}

	pkey = PEM_read_bio_Parameters(in, NULL);
	if (!pkey) {
		BIO_printf(bio_err, "Error reading parameters\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (!noout)
		PEM_write_bio_Parameters(out, pkey);

	if (text)
		EVP_PKEY_print_params(out, pkey, 0, NULL);

	ret = 0;

end:
	EVP_PKEY_free(pkey);
	BIO_free_all(out);
	BIO_free(in);

	return ret;
}