1998-11-18 01:44:37 +00:00
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/*-
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2017-11-26 02:00:33 +00:00
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* SPDX-License-Identifier: BSD-3-Clause
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*
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1998-11-18 01:44:37 +00:00
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* Copyright 1998 Juniper Networks, Inc.
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* All rights reserved.
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2003-05-31 17:19:03 +00:00
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* Copyright (c) 2001-2003 Networks Associates Technology, Inc.
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2001-12-05 16:06:35 +00:00
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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1998-11-18 01:44:37 +00:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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2001-12-05 16:06:35 +00:00
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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1998-11-18 01:44:37 +00:00
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2001-09-30 22:11:06 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1998-11-18 01:44:37 +00:00
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#include <sys/param.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <taclib.h>
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#include <unistd.h>
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#define PAM_SM_AUTH
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2001-12-05 16:06:35 +00:00
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2002-02-05 06:08:26 +00:00
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#include <security/pam_appl.h>
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1998-11-18 01:44:37 +00:00
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#include <security/pam_modules.h>
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2002-02-05 06:08:26 +00:00
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#include <security/pam_mod_misc.h>
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1998-11-18 01:44:37 +00:00
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2003-05-31 16:55:07 +00:00
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#define PAM_OPT_CONF "conf"
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#define PAM_OPT_TEMPLATE_USER "template_user"
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1998-11-18 01:44:37 +00:00
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typedef int (*set_func)(struct tac_handle *, const char *);
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static int do_item(pam_handle_t *, struct tac_handle *, int,
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set_func, const char *);
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static char *get_msg(struct tac_handle *);
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static int set_msg(struct tac_handle *, const char *);
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static int
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do_item(pam_handle_t *pamh, struct tac_handle *tach, int item,
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set_func func, const char *funcname)
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{
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int retval;
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const void *value;
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2001-07-09 18:20:51 +00:00
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retval = pam_get_item(pamh, item, &value);
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if (retval != PAM_SUCCESS)
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1998-11-18 01:44:37 +00:00
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return retval;
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if (value != NULL && (*func)(tach, (const char *)value) == -1) {
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syslog(LOG_CRIT, "%s: %s", funcname, tac_strerror(tach));
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tac_close(tach);
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return PAM_SERVICE_ERR;
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}
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return PAM_SUCCESS;
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}
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static char *
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get_msg(struct tac_handle *tach)
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{
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char *msg;
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2001-07-09 18:20:51 +00:00
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msg = tac_get_msg(tach);
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if (msg == NULL) {
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1998-11-18 01:44:37 +00:00
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syslog(LOG_CRIT, "tac_get_msg: %s", tac_strerror(tach));
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tac_close(tach);
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return NULL;
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}
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return msg;
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}
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static int
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set_msg(struct tac_handle *tach, const char *msg)
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{
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if (tac_set_msg(tach, msg) == -1) {
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syslog(LOG_CRIT, "tac_set_msg: %s", tac_strerror(tach));
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tac_close(tach);
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return -1;
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}
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return 0;
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}
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PAM_EXTERN int
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2002-04-12 22:27:25 +00:00
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pam_sm_authenticate(pam_handle_t *pamh, int flags __unused,
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2003-05-31 16:55:07 +00:00
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int argc __unused, const char *argv[] __unused)
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1998-11-18 01:44:37 +00:00
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{
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int retval;
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struct tac_handle *tach;
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2003-05-31 16:55:07 +00:00
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const char *conf_file, *template_user;
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2001-07-09 18:20:51 +00:00
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2003-05-31 16:55:07 +00:00
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conf_file = openpam_get_option(pamh, PAM_OPT_CONF);
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template_user = openpam_get_option(pamh, PAM_OPT_TEMPLATE_USER);
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1998-11-18 01:44:37 +00:00
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2001-07-09 18:20:51 +00:00
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tach = tac_open();
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if (tach == NULL) {
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1998-11-18 01:44:37 +00:00
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syslog(LOG_CRIT, "tac_open failed");
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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}
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if (tac_config(tach, conf_file) == -1) {
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syslog(LOG_ALERT, "tac_config: %s", tac_strerror(tach));
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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}
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if (tac_create_authen(tach, TAC_AUTHEN_LOGIN, TAC_AUTHEN_TYPE_ASCII,
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TAC_AUTHEN_SVC_LOGIN) == -1) {
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syslog(LOG_CRIT, "tac_create_authen: %s", tac_strerror(tach));
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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}
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2001-07-09 18:20:51 +00:00
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PAM_LOG("Done tac_open() ... tac_close()");
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retval = do_item(pamh, tach, PAM_USER, tac_set_user, "tac_set_user");
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if (retval != PAM_SUCCESS)
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2002-04-12 22:27:25 +00:00
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return (retval);
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2001-07-09 18:20:51 +00:00
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PAM_LOG("Done user");
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retval = do_item(pamh, tach, PAM_TTY, tac_set_port, "tac_set_port");
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if (retval != PAM_SUCCESS)
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2002-04-12 22:27:25 +00:00
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return (retval);
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2001-07-09 18:20:51 +00:00
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PAM_LOG("Done tty");
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retval = do_item(pamh, tach, PAM_RHOST, tac_set_rem_addr,
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"tac_set_rem_addr");
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if (retval != PAM_SUCCESS)
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2002-04-12 22:27:25 +00:00
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return (retval);
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2001-07-09 18:20:51 +00:00
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2002-04-12 22:27:25 +00:00
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for (;;) {
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1998-11-18 01:44:37 +00:00
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char *srvr_msg;
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size_t msg_len;
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const char *user_msg;
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char *data_msg;
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int sflags;
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int status;
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2001-07-09 18:20:51 +00:00
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sflags = tac_send_authen(tach);
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if (sflags == -1) {
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1998-11-18 01:44:37 +00:00
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syslog(LOG_CRIT, "tac_send_authen: %s",
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tac_strerror(tach));
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (PAM_AUTHINFO_UNAVAIL);
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1998-11-18 01:44:37 +00:00
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}
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status = TAC_AUTHEN_STATUS(sflags);
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2003-05-31 16:55:07 +00:00
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openpam_set_option(pamh, PAM_OPT_ECHO_PASS,
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TAC_AUTHEN_NOECHO(sflags) ? NULL : "");
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1998-11-18 01:44:37 +00:00
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switch (status) {
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case TAC_AUTHEN_STATUS_PASS:
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tac_close(tach);
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if (template_user != NULL) {
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const void *item;
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const char *user;
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2001-07-09 18:20:51 +00:00
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PAM_LOG("Trying template user: %s",
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template_user);
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1998-11-18 01:44:37 +00:00
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/*
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* If the given user name doesn't exist in
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* the local password database, change it
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* to the value given in the "template_user"
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* option.
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*/
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retval = pam_get_item(pamh, PAM_USER, &item);
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if (retval != PAM_SUCCESS)
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2002-04-12 22:27:25 +00:00
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return (retval);
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1998-11-18 01:44:37 +00:00
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user = (const char *)item;
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2001-07-09 18:20:51 +00:00
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if (getpwnam(user) == NULL) {
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1998-11-18 01:44:37 +00:00
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pam_set_item(pamh, PAM_USER,
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template_user);
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2001-07-09 18:20:51 +00:00
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PAM_LOG("Using template user");
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}
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1998-11-18 01:44:37 +00:00
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}
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2002-04-12 22:27:25 +00:00
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return (PAM_SUCCESS);
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1998-11-18 01:44:37 +00:00
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case TAC_AUTHEN_STATUS_FAIL:
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tac_close(tach);
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2001-08-10 19:12:59 +00:00
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PAM_VERBOSE_ERROR("TACACS+ authentication failed");
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2002-04-12 22:27:25 +00:00
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return (PAM_AUTH_ERR);
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1998-11-18 01:44:37 +00:00
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case TAC_AUTHEN_STATUS_GETUSER:
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case TAC_AUTHEN_STATUS_GETPASS:
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if ((srvr_msg = get_msg(tach)) == NULL)
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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if (status == TAC_AUTHEN_STATUS_GETUSER)
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retval = pam_get_user(pamh, &user_msg,
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2002-04-06 19:30:04 +00:00
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*srvr_msg ? srvr_msg : NULL);
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1998-11-18 01:44:37 +00:00
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else if (status == TAC_AUTHEN_STATUS_GETPASS)
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2002-04-06 19:30:04 +00:00
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retval = pam_get_authtok(pamh,
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PAM_AUTHTOK, &user_msg,
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*srvr_msg ? srvr_msg : "Password:");
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1998-11-18 01:44:37 +00:00
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free(srvr_msg);
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if (retval != PAM_SUCCESS) {
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/* XXX - send a TACACS+ abort packet */
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (retval);
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1998-11-18 01:44:37 +00:00
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}
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if (set_msg(tach, user_msg) == -1)
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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break;
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case TAC_AUTHEN_STATUS_GETDATA:
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if ((srvr_msg = get_msg(tach)) == NULL)
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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retval = pam_prompt(pamh,
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2003-05-31 16:55:07 +00:00
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openpam_get_option(pamh, PAM_OPT_ECHO_PASS) ?
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PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF,
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2002-04-06 19:30:04 +00:00
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&data_msg, "%s", *srvr_msg ? srvr_msg : "Data:");
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1998-11-18 01:44:37 +00:00
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free(srvr_msg);
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if (retval != PAM_SUCCESS) {
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/* XXX - send a TACACS+ abort packet */
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (retval);
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1998-11-18 01:44:37 +00:00
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}
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retval = set_msg(tach, data_msg);
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memset(data_msg, 0, strlen(data_msg));
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free(data_msg);
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if (retval == -1)
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2002-04-12 22:27:25 +00:00
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return (PAM_SERVICE_ERR);
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1998-11-18 01:44:37 +00:00
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break;
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case TAC_AUTHEN_STATUS_ERROR:
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srvr_msg = (char *)tac_get_data(tach, &msg_len);
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if (srvr_msg != NULL && msg_len != 0) {
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syslog(LOG_CRIT, "tac_send_authen:"
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" server detected error: %s", srvr_msg);
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free(srvr_msg);
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2001-07-09 18:20:51 +00:00
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}
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else
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1998-11-18 01:44:37 +00:00
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syslog(LOG_CRIT,
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"tac_send_authen: server detected error");
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (PAM_AUTHINFO_UNAVAIL);
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1998-11-18 01:44:37 +00:00
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break;
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case TAC_AUTHEN_STATUS_RESTART:
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case TAC_AUTHEN_STATUS_FOLLOW:
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default:
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syslog(LOG_CRIT,
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"tac_send_authen: unexpected status %#x", status);
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tac_close(tach);
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2002-04-12 22:27:25 +00:00
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return (PAM_AUTHINFO_UNAVAIL);
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1998-11-18 01:44:37 +00:00
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}
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}
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}
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PAM_EXTERN int
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2002-04-12 22:27:25 +00:00
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pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
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int argc __unused, const char *argv[] __unused)
|
1998-11-18 01:44:37 +00:00
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{
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2001-12-05 16:06:35 +00:00
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2002-04-12 22:27:25 +00:00
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return (PAM_IGNORE);
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1998-11-18 01:44:37 +00:00
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}
|
1999-01-20 21:55:30 +00:00
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PAM_MODULE_ENTRY("pam_tacplus");
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