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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2016 Toomas Soome <tsoome@me.com>
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <strings.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/pam_impl.h>
#include <syslog.h>
#include <pwd.h>
#include <shadow.h>
#include <lastlog.h>
#include <ctype.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <libintl.h>
#include <signal.h>
#include <thread.h>
#include <synch.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <crypt.h>
#include <assert.h>
#include <nss_dbdefs.h>
#define LASTLOG "/var/adm/lastlog"
/*
* pam_sm_close_session - Terminate a PAM authenticated session
*/
/*ARGSUSED*/
int
pam_sm_close_session(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
int i;
int debug = 0;
for (i = 0; i < argc; i++) {
if (strcasecmp(argv[i], "debug") == 0)
debug = 1;
else if (strcasecmp(argv[i], "nowarn") != 0)
syslog(LOG_ERR, "illegal option %s", argv[i]);
}
if (debug)
syslog(LOG_DEBUG,
"pam_unix_session: inside pam_sm_close_session()");
return (PAM_SUCCESS);
}
/*ARGSUSED*/
int
pam_sm_open_session(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
int error;
char *ttyn, *rhost, *user;
int fdl;
struct lastlog newll;
struct passwd pwd;
char buffer[NSS_BUFLEN_PASSWD];
int i;
int debug = 0;
offset_t offset;
time_t cur_time;
for (i = 0; i < argc; i++) {
if (strcasecmp(argv[i], "debug") == 0)
debug = 1;
else if (strcasecmp(argv[i], "nowarn") == 0)
flags = flags | PAM_SILENT;
else
syslog(LOG_ERR, "illegal option %s", argv[i]);
}
if (debug)
syslog(LOG_DEBUG,
"pam_unix_session: inside pam_sm_open_session()");
if ((error = pam_get_item(pamh, PAM_TTY, (void **)&ttyn))
!= PAM_SUCCESS ||
(error = pam_get_item(pamh, PAM_USER, (void **)&user))
!= PAM_SUCCESS ||
(error = pam_get_item(pamh, PAM_RHOST, (void **)&rhost))
!= PAM_SUCCESS) {
return (error);
}
if (user == NULL || *user == '\0')
return (PAM_USER_UNKNOWN);
/* report error if ttyn not set */
if (ttyn == NULL)
return (PAM_SESSION_ERR);
if (getpwnam_r(user, &pwd, buffer, sizeof (buffer)) == NULL) {
return (PAM_USER_UNKNOWN);
}
if ((fdl = open(LASTLOG, O_RDWR|O_CREAT|O_DSYNC, 0444)) >= 0) {
/*
* The value of lastlog is read by the UNIX
* account management module
*/
offset = (offset_t)pwd.pw_uid *
(offset_t)sizeof (struct lastlog);
if (llseek(fdl, offset, SEEK_SET) != offset) {
syslog(LOG_ERR,
"pam_unix_session: Can't update lastlog: uid %d "
"too large", pwd.pw_uid);
(void) close(fdl);
return (PAM_SUCCESS);
}
/*
* use time32_t in case of _LP64
* since it's written in lastlog.h
*/
(void) time(&cur_time);
bzero((char *)&newll, sizeof (struct lastlog));
#ifdef _LP64
newll.ll_time = (time32_t)cur_time;
#else
newll.ll_time = cur_time;
#endif
if ((strncmp(ttyn, "/dev/", 5) == 0)) {
(void) strlcpy(newll.ll_line,
(ttyn + sizeof ("/dev/")-1),
sizeof (newll.ll_line));
} else {
(void) strlcpy(newll.ll_line, ttyn,
sizeof (newll.ll_line));
}
if (rhost != NULL) {
(void) strlcpy(newll.ll_host, rhost,
sizeof (newll.ll_host));
}
if (debug) {
char buf[26];
(void) ctime_r((const time_t *)&cur_time, buf,
sizeof (buf));
buf[24] = '\000';
syslog(LOG_DEBUG, "pam_unix_session: "
"user = %s, time = %s, tty = %s, host = %s.",
user, buf, newll.ll_line, newll.ll_host);
}
if (write(fdl, (char *)&newll, sizeof (newll))
!= sizeof (newll))
syslog(LOG_ERR, "pam_unix_session: Can't write "
"lastlog: uid %d: %m", pwd.pw_uid);
if (close(fdl) != 0)
syslog(LOG_ERR, "pam_unix_session: Can't close "
"lastlog: uid %d: %m", pwd.pw_uid);
}
return (PAM_SUCCESS);
}
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