diff --git a/lib/libpam/modules/pam_lastlog/Makefile b/lib/libpam/modules/pam_lastlog/Makefile new file mode 100644 index 000000000000..04793af983f5 --- /dev/null +++ b/lib/libpam/modules/pam_lastlog/Makefile @@ -0,0 +1,32 @@ +# Copyright 2001 Mark R V Murray +# All rights reserved. +# +# 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. +# +# 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. +# +# $FreeBSD$ + +LIB= pam_lastlog +SHLIB_NAME= pam_lastlog.so +SRCS= pam_lastlog.c +MAN= pam_lastlog.8 + +.include diff --git a/lib/libpam/modules/pam_lastlog/pam_lastlog.8 b/lib/libpam/modules/pam_lastlog/pam_lastlog.8 new file mode 100644 index 000000000000..bb01ee047a8b --- /dev/null +++ b/lib/libpam/modules/pam_lastlog/pam_lastlog.8 @@ -0,0 +1,97 @@ +.\" Copyright (c) 2001 Mark R V Murray +.\" All rights reserved. +.\" Copyright (c) 2001 Networks Associates Technologies, 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. +.\" +.\" 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. +.\" +.\" $FreeBSD$ +.\" +.Dd January 24, 2002 +.Dt PAM_LASTLOG 8 +.Os +.Sh NAME +.Nm pam_lastlog +.Nd login accounting PAM module +.Sh SYNOPSIS +.Op Ar service-name +.Ar module-type +.Ar control-flag +.Pa pam_lastlog +.Op Ar options +.Sh DESCRIPTION +The login accounting service module for PAM, +.Nm +provides functionality for only one PAM category: +session management. +In terms of the +.Ar module-type +parameter, this is the +.Dq Li session +feature. +.Ss Login Accounting Session Management Module +The login accounting session management component provides functions +to initiate +.Pq Fn pam_sm_open_session +and terminate +.Pq Fn pam_sm_close_session +sessions. +The +.Fn pam_sm_open_session +function records the session in the +.Xr utmp 5 , +.Xr wtmp 5 +and +.Xr lastlog 5 +databases. +The +.Fn pam_sm_close_session +records the end of the session in the +.Xr utmp 5 +and +.Xr wtmp 5 +databases. +.Sh SEE ALSO +.Xr last 1 , +.Xr lastlogin 1 , +.Xr login 3 , +.Xr logout 3 , +.Xr utmp 5 , +.Xr w 1 , +.Xr pam.conf 5 , +.Xr pam 8 +.Sh AUTHORS +The +.Nm +module and this manual page 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 +.Pq Dq CBOSS , +as part of the DARPA CHATS research program. diff --git a/lib/libpam/modules/pam_lastlog/pam_lastlog.c b/lib/libpam/modules/pam_lastlog/pam_lastlog.c new file mode 100644 index 000000000000..e6ca3ced38e5 --- /dev/null +++ b/lib/libpam/modules/pam_lastlog/pam_lastlog.c @@ -0,0 +1,240 @@ +/*- + * 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 Technologies, 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("$FreeBSD$"); + +#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 + +extern int login_access(const char *, const char *); + +PAM_EXTERN int +pam_sm_authenticate(pam_handle_t *pamh, int flags, 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, int flags, 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, int flags, 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, int flags, 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; + char *buf; + 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, 0); + if (fd == -1) { + syslog(LOG_ERR, "cannot open %s: %m", _PATH_LASTLOG); + PAM_RETURN(PAM_SERVICE_ERR); + } + + /* + * 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) + strncpy(utmp.ut_host, rhost, sizeof(utmp.ut_host)); + (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); + login(&utmp); + + /* + * 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) { + asprintf(&buf, "Last login: %.*s ", 24 - 5, + ctime(&ll.ll_time)); + if (buf != NULL) { + pam_prompt(pamh, PAM_TEXT_INFO, buf, NULL); + free(buf); + } + if (*ll.ll_host != '\0') + asprintf(&buf, "from %.*s\n", + (int)sizeof(ll.ll_host), ll.ll_host); + else + asprintf(&buf, "on %.*s\n", + (int)sizeof(ll.ll_line), ll.ll_line); + if (buf != NULL) { + pam_prompt(pamh, PAM_TEXT_INFO, buf, NULL); + free(buf); + } + } + 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) + /* 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); + 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, int flags, int argc, const char **argv) +{ + struct options options; + const char *tty; + int pam_err; + + pam_std_option(&options, NULL, argc, argv); + + PAM_LOG("Options processed"); + + pam_err = pam_get_item(pamh, PAM_TTY, (const void **)&tty); + if (pam_err != PAM_SUCCESS) + PAM_RETURN(pam_err); + if (tty != NULL) + logout(tty); + + PAM_RETURN(PAM_SUCCESS); +} + +PAM_MODULE_ENTRY("pam_lastlog");