/* $OpenBSD: nseq.c,v 1.7 2017/01/20 08:57:12 deraadt Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 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/pem.h>

static struct {
	char *infile;
	char *outfile;
	int toseq;
} nseq_config;

static struct option nseq_options[] = {
	{
		.name = "in",
		.argname = "file",
		.desc = "Input file to read from (default stdin)",
		.type = OPTION_ARG,
		.opt.arg = &nseq_config.infile,
	},
	{
		.name = "out",
		.argname = "file",
		.desc = "Output file to write to (default stdout)",
		.type = OPTION_ARG,
		.opt.arg = &nseq_config.outfile,
	},
	{
		.name = "toseq",
		.desc = "Convert certificates to Netscape certificate sequence",
		.type = OPTION_FLAG,
		.opt.flag = &nseq_config.toseq,
	},
	{ NULL },
};

static void
nseq_usage()
{
	fprintf(stderr, "usage: nseq [-in file] [-out file] [-toseq]\n");
	options_usage(nseq_options);
}

int
nseq_main(int argc, char **argv)
{
	BIO *in = NULL, *out = NULL;
	X509 *x509 = NULL;
	NETSCAPE_CERT_SEQUENCE *seq = NULL;
	int i, ret = 1;

	if (single_execution) {
		if (pledge("stdio cpath wpath rpath", NULL) == -1) {
			perror("pledge");
			exit(1);
		}
	}

	memset(&nseq_config, 0, sizeof(nseq_config));

	if (options_parse(argc, argv, nseq_options, NULL, NULL) != 0) {
		nseq_usage();
		return (1);
	}

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

	if (nseq_config.outfile) {
		if (!(out = BIO_new_file(nseq_config.outfile, "w"))) {
			BIO_printf(bio_err,
			    "Can't open output file %s\n", nseq_config.outfile);
			goto end;
		}
	} else {
		out = BIO_new_fp(stdout, BIO_NOCLOSE);
	}
	if (nseq_config.toseq) {
		seq = NETSCAPE_CERT_SEQUENCE_new();
		seq->certs = sk_X509_new_null();
		while ((x509 = PEM_read_bio_X509(in, NULL, NULL, NULL)))
			sk_X509_push(seq->certs, x509);

		if (!sk_X509_num(seq->certs)) {
			BIO_printf(bio_err, "Error reading certs file %s\n", nseq_config.infile);
			ERR_print_errors(bio_err);
			goto end;
		}
		PEM_write_bio_NETSCAPE_CERT_SEQUENCE(out, seq);
		ret = 0;
		goto end;
	}
	if (!(seq = PEM_read_bio_NETSCAPE_CERT_SEQUENCE(in, NULL, NULL, NULL))) {
		BIO_printf(bio_err, "Error reading sequence file %s\n", nseq_config.infile);
		ERR_print_errors(bio_err);
		goto end;
	}
	for (i = 0; i < sk_X509_num(seq->certs); i++) {
		x509 = sk_X509_value(seq->certs, i);
		dump_cert_text(out, x509);
		PEM_write_bio_X509(out, x509);
	}
	ret = 0;
end:
	BIO_free(in);
	BIO_free_all(out);
	NETSCAPE_CERT_SEQUENCE_free(seq);

	return (ret);
}
