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pam_login_access.c revision 1.3.40.1 
      1 /*	$NetBSD: pam_login_access.c,v 1.3.40.1 2012/04/17 00:05:30 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 Mark R V Murray
      5  * All rights reserved.
      6  * Copyright (c) 2001 Networks Associates Technology, Inc.
      7  * All rights reserved.
      8  *
      9  * Portions of this software were developed for the FreeBSD Project by
     10  * ThinkSec AS and NAI Labs, the Security Research Division of Network
     11  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
     12  * ("CBOSS"), as part of the DARPA CHATS research program.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  * 3. The name of the author may not be used to endorse or promote
     23  *    products derived from this software without specific prior written
     24  *    permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifdef __FreeBSD__
     41 __FBSDID("$FreeBSD: src/lib/libpam/modules/pam_login_access/pam_login_access.c,v 1.11 2004/02/10 10:13:21 des Exp $");
     42 #else
     43 __RCSID("$NetBSD: pam_login_access.c,v 1.3.40.1 2012/04/17 00:05:30 yamt Exp $");
     44 #endif
     45 
     46 #define _BSD_SOURCE
     47 
     48 #include <sys/param.h>
     49 
     50 #include <unistd.h>
     51 
     52 #define PAM_SM_ACCOUNT
     53 
     54 #include <security/pam_appl.h>
     55 #include <security/pam_modules.h>
     56 #include <security/pam_mod_misc.h>
     57 
     58 #include "pam_login_access.h"
     59 
     60 PAM_EXTERN int
     61 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused,
     62     int argc __unused, const char *argv[] __unused)
     63 {
     64 	const void *rhost, *tty, *user;
     65 	char hostname[MAXHOSTNAMELEN];
     66 	int pam_err;
     67 
     68 	pam_err = pam_get_item(pamh, PAM_USER, &user);
     69 	if (pam_err != PAM_SUCCESS)
     70 		return (pam_err);
     71 
     72 	if (user == NULL)
     73 		return (PAM_SERVICE_ERR);
     74 
     75 	PAM_LOG("Got user: %s", (const char *)user);
     76 
     77 	pam_err = pam_get_item(pamh, PAM_RHOST, &rhost);
     78 	if (pam_err != PAM_SUCCESS)
     79 		return (pam_err);
     80 
     81 	pam_err = pam_get_item(pamh, PAM_TTY, &tty);
     82 	if (pam_err != PAM_SUCCESS)
     83 		return (pam_err);
     84 
     85 	gethostname(hostname, sizeof hostname);
     86 
     87 	if (rhost == NULL || *(const char *)rhost == '\0') {
     88 		PAM_LOG("Checking login.access for user %s on tty %s",
     89 		    (const char *)user, (const char *)tty);
     90 		if (login_access(user, tty) != 0)
     91 			return (PAM_SUCCESS);
     92 		PAM_VERBOSE_ERROR("%s is not allowed to log in on %s",
     93 		    (const char *)user, (const char *)tty);
     94 	} else {
     95 		PAM_LOG("Checking login.access for user %s from host %s",
     96 		    (const char *)user, (const char *)rhost);
     97 		if (login_access(user, rhost) != 0)
     98 			return (PAM_SUCCESS);
     99 		PAM_VERBOSE_ERROR("%s is not allowed to log in from %s",
    100 		    (const char *)user, (const char *)rhost);
    101 	}
    102 
    103 	return (PAM_AUTH_ERR);
    104 }
    105 
    106 PAM_MODULE_ENTRY("pam_login_access");
    107