/*- * 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 __FBSDID("$FreeBSD$"); #define _BSD_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #define PAM_SM_SESSION #include #include #include PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, int argc __unused, const char *argv[] __unused) { struct passwd *pwd; struct utmp utmp; struct lastlog ll; time_t t; const char *user; const void *rhost, *tty; off_t llpos; int fd, pam_err; pam_err = pam_get_user(pamh, &user, NULL); if (pam_err != PAM_SUCCESS) return (pam_err); if (user == NULL || (pwd = getpwnam(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; } if (strncmp(tty, _PATH_DEV, strlen(_PATH_DEV)) == 0) tty = (const char *)tty + strlen(_PATH_DEV); if (*(const char *)tty == '\0') return (PAM_SERVICE_ERR); fd = open(_PATH_LASTLOG, O_RDWR|O_CREAT, 0644); if (fd == -1) { PAM_LOG("Failed to open %s", _PATH_LASTLOG); goto file_err; } /* * Record session in lastlog(5). */ llpos = (off_t)(pwd->pw_uid * sizeof(ll)); if (lseek(fd, llpos, L_SET) != llpos) goto file_err; if ((flags & PAM_SILENT) == 0) { if (read(fd, &ll, sizeof ll) == sizeof ll && ll.ll_time != 0) { t = ll.ll_time; if (*ll.ll_host != '\0') pam_info(pamh, "Last login: %.*s from %.*s", 24 - 5, ctime(&t), (int)sizeof(ll.ll_host), ll.ll_host); else pam_info(pamh, "Last login: %.*s on %.*s", 24 - 5, ctime(&t), (int)sizeof(ll.ll_line), ll.ll_line); } if (lseek(fd, llpos, L_SET) != llpos) goto file_err; } bzero(&ll, sizeof(ll)); ll.ll_time = time(NULL); /* note: does not need to be NUL-terminated */ strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); if (rhost != NULL && *(const char *)rhost != '\0') /* note: does not need to be NUL-terminated */ strncpy(ll.ll_host, rhost, sizeof(ll.ll_host)); if (write(fd, (char *)&ll, sizeof(ll)) != sizeof(ll) || close(fd) != 0) goto file_err; PAM_LOG("Login recorded in %s", _PATH_LASTLOG); /* * Record session in utmp(5) and wtmp(5). */ bzero(&utmp, sizeof(utmp)); utmp.ut_time = time(NULL); /* note: does not need to be NUL-terminated */ strncpy(utmp.ut_name, user, sizeof(utmp.ut_name)); if (rhost != NULL && *(const char *)rhost != '\0') strncpy(utmp.ut_host, rhost, sizeof(utmp.ut_host)); (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); login(&utmp); return (PAM_SUCCESS); file_err: syslog(LOG_ERR, "%s: %m", _PATH_LASTLOG); if (fd != -1) close(fd); pam_err = PAM_SYSTEM_ERR; 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 __unused, int flags __unused, int argc __unused, const char *argv[] __unused) { const void *tty; pam_get_item(pamh, PAM_TTY, (const void **)&tty); if (strncmp(tty, _PATH_DEV, strlen(_PATH_DEV)) == 0) tty = (const char *)tty + strlen(_PATH_DEV); if (*(const char *)tty == '\0') return (PAM_SERVICE_ERR); if (logout(tty) != 1) syslog(LOG_ERR, "%s(): no utmp record for %s", __func__, (const char *)tty); logwtmp(tty, "", ""); return (PAM_SUCCESS); } PAM_MODULE_ENTRY("pam_lastlog");