FreeBSD-5.3/usr.bin/chkey/chkey.c
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user or with the express written consent of
* Sun Microsystems, Inc.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)chkey.c 1.7 91/03/11 Copyr 1986 Sun Micro";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/chkey/chkey.c,v 1.5 2002/08/27 19:06:44 charnier Exp $");
/*
* Copyright (C) 1986, Sun Microsystems, Inc.
*/
/*
* Command to change one's public key in the public key database
*/
#include <rpc/rpc.h>
#include <rpc/key_prot.h>
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#else
#define YPOP_STORE 4
#endif
#include <sys/fcntl.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
#ifdef YPPASSWD
struct passwd *ypgetpwuid(uid_t);
#endif
#ifdef YP
static char *domain;
static char PKMAP[] = "publickey.byname";
#else
static char PKFILE[] = "/etc/publickey";
#endif /* YP */
static char ROOTKEY[] = "/etc/.rootkey";
static void usage(void);
extern int yp_update(char *, char *, int, char *, size_t, char *, size_t);
int
main(int argc, char **argv)
{
char name[MAXNETNAMELEN+1];
char public[HEXKEYBYTES + 1];
char secret[HEXKEYBYTES + 1];
char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
int status;
char *pass;
struct passwd *pw;
uid_t uid;
int force = 0;
int ch;
#ifdef YP
char *master;
#endif
while ((ch = getopt(argc, argv, "f")) != -1)
switch(ch) {
case 'f':
force = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
#ifdef YP
(void)yp_get_default_domain(&domain);
if (yp_master(domain, PKMAP, &master) != 0)
errx(1, "can't find master of publickey database");
#endif
uid = getuid() /*geteuid()*/;
if (uid == 0) {
if (host2netname(name, NULL, NULL) == 0)
errx(1, "cannot convert hostname to netname");
} else {
if (user2netname(name, uid, NULL) == 0)
errx(1, "cannot convert username to netname");
}
(void)printf("Generating new key for %s.\n", name);
if (!force) {
if (uid != 0) {
#ifdef YPPASSWD
pw = ypgetpwuid(uid);
#else
pw = getpwuid(uid);
#endif
if (pw == NULL) {
#ifdef YPPASSWD
errx(1,
"no NIS password entry found: can't change key");
#else
errx(1,
"no password entry found: can't change key");
#endif
}
} else {
pw = getpwuid(0);
if (pw == NULL)
errx(1, "no password entry found: can't change key");
}
}
pass = getpass("Password:");
#ifdef YPPASSWD
if (!force) {
if (strcmp(crypt(pass, pw->pw_passwd), pw->pw_passwd) != 0)
errx(1, "invalid password");
}
#else
force = 1; /* Make this mandatory */
#endif
genkeys(public, secret, pass);
memcpy(crypt1, secret, HEXKEYBYTES);
memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE);
crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0;
xencrypt(crypt1, pass);
if (force) {
memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1);
xdecrypt(crypt2, getpass("Retype password:"));
if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0
|| memcmp(crypt2, secret, HEXKEYBYTES) != 0)
errx(1, "password incorrect");
}
#ifdef YP
(void)printf("Sending key change request to %s...\n", master);
#endif
status = setpublicmap(name, public, crypt1);
if (status != 0) {
#ifdef YP
errx(1, "unable to update NIS database (%u): %s",
status, yperr_string(status));
#else
errx(1, "unable to update publickey database");
#endif
}
if (uid == 0) {
/*
* Root users store their key in /etc/$ROOTKEY so
* that they can auto reboot without having to be
* around to type a password. Storing this in a file
* is rather dubious: it should really be in the EEPROM
* so it does not go over the net.
*/
int fd;
fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0);
if (fd < 0) {
warn("%s", ROOTKEY);
} else {
char newline = '\n';
if (write(fd, secret, strlen(secret)) < 0 ||
write(fd, &newline, sizeof(newline)) < 0)
warn("%s: write", ROOTKEY);
}
}
if (key_setsecret(secret) < 0)
errx(1, "unable to login with new secret key");
(void)printf("Done.\n");
exit(0);
/* NOTREACHED */
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: chkey [-f]\n");
exit(1);
/* NOTREACHED */
}
/*
* Set the entry in the public key file
*/
int
setpublicmap(char *name, char *public, char *secret)
{
char pkent[1024];
(void)sprintf(pkent,"%s:%s", public, secret);
#ifdef YP
return (yp_update(domain, PKMAP, YPOP_STORE,
name, strlen(name), pkent, strlen(pkent)));
#else
return (localupdate(name, PKFILE, YPOP_STORE,
strlen(name), name, strlen(pkent), pkent));
#endif
}
#ifdef YPPASSWD
struct passwd *
ypgetpwuid(uid_t uid)
{
char uidstr[10];
char *val;
int vallen;
static struct passwd pw;
char *p;
(void)sprintf(uidstr, "%d", uid);
if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr),
&val, &vallen) != 0) {
return (NULL);
}
p = strchr(val, ':');
if (p == NULL) {
return (NULL);
}
pw.pw_passwd = p + 1;
p = strchr(pw.pw_passwd, ':');
if (p == NULL) {
return (NULL);
}
*p = 0;
return (&pw);
}
#endif /* YPPASSWD */