/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)make_keypair.c	1.5 (Berkeley) 6/25/90";
#endif /* not lint */

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

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

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

	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)sprintf(namebuf, ".%s%s",
		CLIENT_KEYFILE,
		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);
}