/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2002 Networks Associates Technologies, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by ThinkSec AS and
* NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
#include <security/pam_appl.h>
#include <security/openpam.h>
static pam_handle_t *pamh;
static struct pam_conv pamc = {
openpam_ttyconv,
NULL
};
static char *yp_domain;
static char *yp_host;
static void
usage(void)
{
fprintf(stderr, "usage: passwd [-ly] [-d domain] [-h host] [user]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
char hostname[MAXHOSTNAMELEN];
struct passwd *pwd = NULL; /* Keep compiler happy. */
int o, pam_err;
uid_t uid;
while ((o = getopt(argc, argv, "d:h:loy")) != -1)
switch (o) {
case 'd':
yp_domain = optarg;
break;
case 'h':
yp_host = optarg;
break;
case 'l':
case 'o':
case 'y':
/* compatibility */
break;
default:
usage();
}
argc -= optind;
argv += optind;
uid = getuid();
switch (argc) {
case 0:
if ((pwd = getpwuid(uid)) == NULL)
errx(1, "who are you?");
break;
case 1:
if ((pwd = getpwnam(*argv)) == NULL)
errx(1, "%s: no such user", *argv);
break;
default:
usage();
}
if (uid != 0 && uid != pwd->pw_uid)
errx(1, "permission denied");
/* check where the user's from */
switch (pwd->pw_fields & _PWF_SOURCE) {
case _PWF_FILES:
fprintf(stderr, "Changing local password for %s\n",
pwd->pw_name);
break;
case _PWF_NIS:
fprintf(stderr, "Changing NIS password for %s\n",
pwd->pw_name);
break;
default:
/* XXX: Green men ought to be supported via PAM. */
errx(1,
"Sorry, `passwd' can only change passwords for local or NIS users.");
}
#define pam_check(func) do { \
if (pam_err != PAM_SUCCESS) { \
if (pam_err == PAM_AUTH_ERR || pam_err == PAM_PERM_DENIED || \
pam_err == PAM_AUTHTOK_RECOVERY_ERR) \
warnx("sorry"); \
else \
warnx("%s(): %s", func, pam_strerror(pamh, pam_err)); \
goto end; \
} \
} while (0)
/* initialize PAM */
pam_err = pam_start("passwd", pwd->pw_name, &pamc, &pamh);
pam_check("pam_start");
pam_err = pam_set_item(pamh, PAM_TTY, ttyname(STDERR_FILENO));
pam_check("pam_set_item");
gethostname(hostname, sizeof hostname);
pam_err = pam_set_item(pamh, PAM_RHOST, hostname);
pam_check("pam_set_item");
pam_err = pam_set_item(pamh, PAM_RUSER, getlogin());
pam_check("pam_set_item");
/* set YP domain and host */
pam_err = pam_set_data(pamh, "yp_domain", yp_domain, NULL);
pam_check("pam_set_data");
pam_err = pam_set_data(pamh, "yp_server", yp_host, NULL);
pam_check("pam_set_data");
/* set new password */
pam_err = pam_chauthtok(pamh, 0);
pam_check("pam_chauthtok");
end:
pam_end(pamh, pam_err);
exit(pam_err == PAM_SUCCESS ? 0 : 1);
}
plain