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("$FreeBSD$"); 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 from host %s", 84 (const char *)user, (const char *)rhost); 85 if (login_access(user, rhost) != 0) 86 return (PAM_SUCCESS); 87 PAM_VERBOSE_ERROR("%s is not allowed to log in from %s", 88 (const char *)user, (const char *)rhost); 89 } else if (tty != NULL && *(const char *)tty != '\0') { 90 PAM_LOG("Checking login.access for user %s on tty %s", 91 (const char *)user, (const char *)tty); 92 if (login_access(user, tty) != 0) 93 return (PAM_SUCCESS); 94 PAM_VERBOSE_ERROR("%s is not allowed to log in on %s", 95 (const char *)user, (const char *)tty); 96 } else { 97 PAM_LOG("Checking login.access for user %s", 98 (const char *)user); 99 if (login_access(user, "***unknown***") != 0) 100 return (PAM_SUCCESS); 101 PAM_VERBOSE_ERROR("%s is not allowed to log in", 102 (const char *)user); 103 } 104 105 return (PAM_AUTH_ERR); 106 } 107 108 PAM_MODULE_ENTRY("pam_login_access"); 109