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pam_login_access.c revision 1.1.1.1 
      1 /*-
      2  * Copyright (c) 2001 Mark R V Murray
      3  * All rights reserved.
      4  * Copyright (c) 2001 Networks Associates Technology, Inc.
      5  * All rights reserved.
      6  *
      7  * Portions of this software were developed for the FreeBSD Project by
      8  * ThinkSec AS and NAI Labs, the Security Research Division of Network
      9  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
     10  * ("CBOSS"), as part of the DARPA CHATS research program.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. The name of the author may not be used to endorse or promote
     21  *    products derived from this software without specific prior written
     22  *    permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __FBSDID("$FreeBSD: src/lib/libpam/modules/pam_login_access/pam_login_access.c,v 1.11 2004/02/10 10:13:21 des Exp $");
     39 
     40 #define _BSD_SOURCE
     41 
     42 #include <sys/param.h>
     43 
     44 #include <syslog.h>
     45 #include <unistd.h>
     46 
     47 #define PAM_SM_ACCOUNT
     48 
     49 #include <security/pam_appl.h>
     50 #include <security/pam_modules.h>
     51 #include <security/pam_mod_misc.h>
     52 
     53 #include "pam_login_access.h"
     54 
     55 PAM_EXTERN int
     56 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused,
     57     int argc __unused, const char *argv[] __unused)
     58 {
     59 	const void *rhost, *tty, *user;
     60 	char hostname[MAXHOSTNAMELEN];
     61 	int pam_err;
     62 
     63 	pam_err = pam_get_item(pamh, PAM_USER, &user);
     64 	if (pam_err != PAM_SUCCESS)
     65 		return (pam_err);
     66 
     67 	if (user == NULL)
     68 		return (PAM_SERVICE_ERR);
     69 
     70 	PAM_LOG("Got user: %s", (const char *)user);
     71 
     72 	pam_err = pam_get_item(pamh, PAM_RHOST, &rhost);
     73 	if (pam_err != PAM_SUCCESS)
     74 		return (pam_err);
     75 
     76 	pam_err = pam_get_item(pamh, PAM_TTY, &tty);
     77 	if (pam_err != PAM_SUCCESS)
     78 		return (pam_err);
     79 
     80 	gethostname(hostname, sizeof hostname);
     81 
     82 	if (rhost == NULL || *(const char *)rhost == '\0') {
     83 		PAM_LOG("Checking login.access for user %s on tty %s",
     84 		    (const char *)user, (const char *)tty);
     85 		if (login_access(user, tty) != 0)
     86 			return (PAM_SUCCESS);
     87 		PAM_VERBOSE_ERROR("%s is not allowed to log in on %s",
     88 		    user, tty);
     89 	} else {
     90 		PAM_LOG("Checking login.access for user %s from host %s",
     91 		    (const char *)user, (const char *)rhost);
     92 		if (login_access(user, rhost) != 0)
     93 			return (PAM_SUCCESS);
     94 		PAM_VERBOSE_ERROR("%s is not allowed to log in from %s",
     95 		    user, rhost);
     96 	}
     97 
     98 	return (PAM_AUTH_ERR);
     99 }
    100 
    101 PAM_MODULE_ENTRY("pam_login_access");
    102