/*	$Id: make_keypair.c,v 1.4 1997/06/29 10:32:18 provos Exp $	*/

/*-
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  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 acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS 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 REGENTS OR 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)make_keypair.c	8.1 (Berkeley) 6/1/93";
#endif /* not lint */

#include <sys/types.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <strings.h>
#include <netdb.h>
#include <unistd.h>
#include <des.h>
#include <kerberosIV/krb.h>
#include "pathnames.h"
#include "register_proto.h"

char *progname;

extern void herror();
void make_key(), usage();

main(argc, argv)
	int	argc;
	char	**argv;
{
	struct hostent	*hp;
	char		*addr;
	int		i;
	struct sockaddr_in	sin;

	progname = (addr = strrchr(*argv, '/')) ? addr + 1 : *argv;
	if (argc != 2) {
		usage(argv[0]);
		exit(1);
	}

	if ((hp = gethostbyname(argv[1])) == NULL) {
		herror(argv[1]);
		exit(1);
	}

	for (i = 0; addr = hp->h_addr_list[i]; i++) {
		addr = hp->h_addr_list[i];
		bcopy(addr, &sin.sin_addr, hp->h_length);

		printf("Making key for host %s (%s)\n",
			argv[1], inet_ntoa(sin.sin_addr));
		make_key(sin.sin_addr);
	}
	printf("==========\n");
	printf("One copy of the each key should be put in %s on the\n",
		SERVER_KEYDIR);
	printf("Kerberos server machine (mode 600, owner root).\n");
	printf("Another copy of each key should be put on the named\n");
	printf("client as %sXXX.XXX.XXX.XXX (same modes as above),\n",
		CLIENT_KEYFILE);
	printf("where the X's refer to digits of the host's inet address.\n");
	(void)fflush(stdout);
	exit(0);
}

void
make_key(addr)
	struct in_addr	addr;
{
	struct keyfile_data	kfile;
	char		namebuf[255];
	int		fd;

	(void)snprintf(namebuf, sizeof(namebuf), "%s", inet_ntoa(addr));
	fd = open(namebuf, O_WRONLY|O_CREAT, 0600);
	if (fd < 0) {
		perror("open");
		exit(1);
	}
	random_key(kfile.kf_key);
	printf("writing to file -> %s ...", namebuf);
	if (write(fd, &kfile, sizeof(kfile)) != sizeof(kfile)) {
		fprintf(stderr, "error writing file %s\n", namebuf);
	}
	printf("done.\n");
	(void)close(fd);
	return;
}

void
usage(name)
	char	*name;
{
	fprintf(stderr, "usage: %s host\n", name);
}