/*- * 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. * * 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: head/lib/libpam/modules/pam_lastlog/pam_lastlog.c 92297 2002-03-14 23:27:59Z des $"); #define _BSD_SOURCE #include #include #include #include #include #include #include #include #include #include #include #define PAM_SM_AUTH #define PAM_SM_ACCOUNT #define PAM_SM_SESSION #define PAM_SM_PASSWORD #include #include #include extern int login_access(const char *, const char *); PAM_EXTERN int pam_sm_authenticate(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv) { struct options options; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); PAM_RETURN(PAM_IGNORE); } PAM_EXTERN int pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv) { struct options options; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); PAM_RETURN(PAM_IGNORE); } PAM_EXTERN int pam_sm_acct_mgmt(pam_handle_t *pamh __unused, int flags __unused, int argc ,const char **argv) { struct options options; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); PAM_RETURN(PAM_IGNORE); } PAM_EXTERN int pam_sm_chauthtok(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv) { struct options options; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); PAM_RETURN(PAM_IGNORE); } PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv) { struct options options; struct passwd *pwd; struct utmp utmp; struct lastlog ll; const char *rhost, *user, *tty; off_t llpos; int fd, pam_err; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); pam_err = pam_get_item(pamh, PAM_USER, (const void **)&user); if (pam_err != PAM_SUCCESS) PAM_RETURN(pam_err); if (user == NULL || (pwd = getpwnam(user)) == NULL) PAM_RETURN(PAM_SERVICE_ERR); PAM_LOG("Got user: %s", user); pam_err = pam_get_item(pamh, PAM_RHOST, (const void **)&rhost); if (pam_err != PAM_SUCCESS) PAM_RETURN(pam_err); pam_err = pam_get_item(pamh, PAM_TTY, (const void **)&tty); if (pam_err != PAM_SUCCESS) PAM_RETURN(pam_err); if (tty == NULL) PAM_RETURN(PAM_SERVICE_ERR); fd = open(_PATH_LASTLOG, O_RDWR|O_CREAT, 0644); if (fd == -1) { syslog(LOG_ERR, "cannot open %s: %m", _PATH_LASTLOG); PAM_RETURN(PAM_SERVICE_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) { pam_info(pamh, "Last login: %.*s ", 24 - 5, ctime(&ll.ll_time)); if (*ll.ll_host != '\0') pam_info(pamh, "from %.*s\n", (int)sizeof(ll.ll_host), ll.ll_host); else pam_info(pamh, "on %.*s\n", (int)sizeof(ll.ll_line), ll.ll_line); } if (lseek(fd, llpos, L_SET) != llpos) goto file_err; } bzero(&ll, sizeof(ll)); time(&ll.ll_time); /* note: does not need to be NUL-terminated */ strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); if (rhost != NULL) /* 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)); time(&utmp.ut_time); /* note: does not need to be NUL-terminated */ strncpy(utmp.ut_name, user, sizeof(utmp.ut_name)); if (rhost != NULL) strncpy(utmp.ut_host, rhost, sizeof(utmp.ut_host)); (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); login(&utmp); PAM_RETURN(PAM_IGNORE); file_err: syslog(LOG_ERR, "%s: %m", _PATH_LASTLOG); close(fd); PAM_RETURN(PAM_SERVICE_ERR); } PAM_EXTERN int pam_sm_close_session(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv) { struct options options; pam_std_option(&options, NULL, argc, argv); PAM_LOG("Options processed"); PAM_RETURN(PAM_SUCCESS); } PAM_MODULE_ENTRY("pam_lastlog");