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mirror of https://git.FreeBSD.org/src.git synced 2024-12-16 10:20:30 +00:00
freebsd/usr.bin/passwd/passwd.c
Assar Westerlund 1d4589b693 reset uid back to the user before doing kerberised change password.
root permission is not needed and the kerberos library is paranoid
about access control to the ticket file

PR:		bin/20779
2001-03-12 03:52:00 +00:00

251 lines
5.7 KiB
C

/*
* Copyright (c) 1988, 1993, 1994
* 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 const char copyright[] =
"@(#) Copyright (c) 1988, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)passwd.c 8.3 (Berkeley) 4/2/94";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef YP
#include <pwd.h>
#include <pw_yp.h>
#include <rpcsvc/yp.h>
int __use_yp = 0;
int yp_errno = YP_TRUE;
extern int yp_passwd __P(( char * ));
#endif
#ifdef KERBEROS
#include "krb.h"
#endif
#include "extern.h"
static void usage __P((void));
int use_local_passwd = 0;
int
main(argc, argv)
int argc;
char **argv;
{
int ch;
char *uname;
#ifdef KERBEROS
char *iflag = 0, *rflag = 0, *uflag = 0;
char *k;
#endif
#ifdef YP
#ifdef KERBEROS
char realm[REALM_SZ];
#define OPTIONS "d:h:lysfoi:r:u:"
#else
#define OPTIONS "d:h:lysfo"
#endif
#else
#ifdef KERBEROS
char realm[REALM_SZ];
#define OPTIONS "li:r:u:"
#else
#define OPTIONS "l"
#endif
#endif
#ifdef YP
int res = 0;
if (strstr(argv[0], "yppasswd")) __use_yp = 1;
#endif
while ((ch = getopt(argc, argv, OPTIONS)) != -1) {
switch (ch) {
case 'l': /* change local password file */
use_local_passwd = 1;
break;
#ifdef KERBEROS
case 'i':
iflag = optarg;
break;
case 'r':
rflag = optarg;
break;
case 'u':
uflag = optarg;
break;
#endif /* KERBEROS */
#ifdef YP
case 'y': /* Change NIS password */
__use_yp = 1;
break;
case 'd': /* Specify NIS domain. */
#ifdef PARANOID
if (!getuid()) {
#endif
yp_domain = optarg;
if (yp_server == NULL)
yp_server = "localhost";
#ifdef PARANOID
} else {
warnx("only the super-user may use the -d flag");
}
#endif
break;
case 'h': /* Specify NIS server. */
#ifdef PARANOID
if (!getuid()) {
#endif
yp_server = optarg;
#ifdef PARANOID
} else {
warnx("only the super-user may use the -h flag");
}
#endif
break;
case 'o':
force_old++;
break;
#endif
default:
case '?':
usage();
}
}
argc -= optind;
argv += optind;
if ((uname = getlogin()) == NULL)
err(1, "getlogin");
switch(argc) {
case 0:
break;
case 1:
uname = argv[0];
break;
default:
usage();
}
#ifdef YP
/*
* If NIS is turned on in the password database, use it, else punt.
*/
#ifdef KERBEROS
if (__use_yp || (iflag == NULL && rflag == NULL && uflag == NULL)) {
#endif
res = use_yp(uname, 0, 0);
if (res == USER_YP_ONLY) {
if (!use_local_passwd) {
exit(yp_passwd(uname));
} else {
/*
* Reject -l flag if NIS is turned on and the user
* doesn't exist in the local password database.
*/
errx(1, "unknown local user: %s", uname);
}
} else if (res == USER_LOCAL_ONLY) {
/*
* Reject -y flag if user only exists locally.
*/
if (__use_yp)
errx(1, "unknown NIS user: %s", uname);
} else if (res == USER_YP_AND_LOCAL) {
if (!use_local_passwd && (yp_in_pw_file || __use_yp))
exit(yp_passwd(uname));
}
#ifdef KERBEROS
}
#endif
#endif
if (!use_local_passwd) {
#ifdef KERBEROS
k = auth_getval("auth_list");
if (k && strstr(k, "kerberos"))
if(krb_get_lrealm(realm, 0) == KSUCCESS) {
setuid(getuid());
fprintf(stderr, "realm %s\n", realm);
exit(krb_passwd(argv[0], iflag, rflag, uflag));
}
#endif
}
exit(local_passwd(uname));
}
static void
usage()
{
#ifdef YP
#ifdef KERBEROS
fprintf(stderr, "%s\n%s\n",
"usage: passwd [-l] [-i instance] [-r realm] [-u fullname]",
" passwd [-l] [-y] [-o] [-d domain [-h host]] [user]");
#else
(void)fprintf(stderr,
"usage: passwd [-l] [-y] [-o] [-d domain [-h host]] [user]\n");
#endif
#else
#ifdef KERBEROS
fprintf(stderr,
"usage: passwd [-l] [-i instance] [-r realm] [-u fullname] [user]\n");
#else
(void)fprintf(stderr, "usage: passwd user\n");
#endif
#endif
exit(1);
}