/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2001 Mark R V Murray
* All rights reserved.
* Copyright (c) 2001 Networks Associates Technology, Inc.
* All rights reserved.
* Copyright (c) 2004 Joe R. Doupnik
* All rights reserved.
*
* Portions of this software were 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.
* 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 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>
#define _BSD_SOURCE
#include <sys/time.h>
#include <paths.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <utmpx.h>
#define PAM_SM_SESSION
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/pam_mod_misc.h>
#define PAM_UTMPX_ID "utmpx_id"
PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags,
int argc __unused, const char *argv[] __unused)
{
struct utmpx *utx, utl;
time_t t;
const char *user;
const void *rhost, *tty;
char *id;
int pam_err;
pam_err = pam_get_user(pamh, &user, NULL);
if (pam_err != PAM_SUCCESS)
return (pam_err);
if (user == NULL)
return (PAM_SERVICE_ERR);
PAM_LOG("Got user: %s", user);
pam_err = pam_get_item(pamh, PAM_RHOST, &rhost);
if (pam_err != PAM_SUCCESS) {
PAM_LOG("No PAM_RHOST");
goto err;
}
pam_err = pam_get_item(pamh, PAM_TTY, &tty);
if (pam_err != PAM_SUCCESS) {
PAM_LOG("No PAM_TTY");
goto err;
}
if (tty == NULL) {
PAM_LOG("No PAM_TTY");
pam_err = PAM_SERVICE_ERR;
goto err;
}
/* Strip /dev/ component. */
if (strncmp(tty, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
tty = (const char *)tty + sizeof(_PATH_DEV) - 1;
if ((flags & PAM_SILENT) == 0) {
if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0) {
PAM_LOG("Failed to open lastlogin database");
} else {
utx = getutxuser(user);
if (utx != NULL && utx->ut_type == USER_PROCESS) {
t = utx->ut_tv.tv_sec;
if (*utx->ut_host != '\0')
pam_info(pamh, "Last login: %.*s from %s",
24 - 5, ctime(&t), utx->ut_host);
else
pam_info(pamh, "Last login: %.*s on %s",
24 - 5, ctime(&t), utx->ut_line);
}
endutxent();
}
}
id = malloc(sizeof utl.ut_id);
if (id == NULL) {
pam_err = PAM_SERVICE_ERR;
goto err;
}
arc4random_buf(id, sizeof utl.ut_id);
pam_err = pam_set_data(pamh, PAM_UTMPX_ID, id, openpam_free_data);
if (pam_err != PAM_SUCCESS) {
free(id);
goto err;
}
memset(&utl, 0, sizeof utl);
utl.ut_type = USER_PROCESS;
memcpy(utl.ut_id, id, sizeof utl.ut_id);
strncpy(utl.ut_user, user, sizeof utl.ut_user);
strncpy(utl.ut_line, tty, sizeof utl.ut_line);
if (rhost != NULL)
strncpy(utl.ut_host, rhost, sizeof utl.ut_host);
utl.ut_pid = getpid();
gettimeofday(&utl.ut_tv, NULL);
pututxline(&utl);
return (PAM_SUCCESS);
err:
if (openpam_get_option(pamh, "no_fail"))
return (PAM_SUCCESS);
return (pam_err);
}
PAM_EXTERN int
pam_sm_close_session(pam_handle_t *pamh, int flags __unused,
int argc __unused, const char *argv[] __unused)
{
struct utmpx utl;
const void *id;
int pam_err;
pam_err = pam_get_data(pamh, PAM_UTMPX_ID, (const void **)&id);
if (pam_err != PAM_SUCCESS)
goto err;
memset(&utl, 0, sizeof utl);
utl.ut_type = DEAD_PROCESS;
memcpy(utl.ut_id, id, sizeof utl.ut_id);
utl.ut_pid = getpid();
gettimeofday(&utl.ut_tv, NULL);
pututxline(&utl);
return (PAM_SUCCESS);
err:
if (openpam_get_option(pamh, "no_fail"))
return (PAM_SUCCESS);
return (pam_err);
}
PAM_MODULE_ENTRY("pam_lastlog");
plain