/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001,2003 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was 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.
*/
#include <sys/cdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/openpam.h>
static int
_pam_echo(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
char msg[PAM_MAX_MSG_SIZE];
const void *str;
const char *p, *q;
int err, i, item;
size_t len;
if (flags & PAM_SILENT)
return (PAM_SUCCESS);
for (i = 0, len = 0; i < argc && len < sizeof(msg) - 1; ++i) {
if (i > 0)
msg[len++] = ' ';
for (p = argv[i]; *p != '\0' && len < sizeof(msg) - 1; ++p) {
if (*p != '%' || p[1] == '\0') {
msg[len++] = *p;
continue;
}
switch (*++p) {
case 'H':
item = PAM_RHOST;
break;
case 'h':
/* not implemented */
item = -1;
break;
case 's':
item = PAM_SERVICE;
break;
case 't':
item = PAM_TTY;
break;
case 'U':
item = PAM_RUSER;
break;
case 'u':
item = PAM_USER;
break;
default:
item = -1;
msg[len++] = *p;
break;
}
if (item == -1)
continue;
err = pam_get_item(pamh, item, &str);
if (err != PAM_SUCCESS)
return (err);
if (str == NULL)
str = "(null)";
for (q = str; *q != '\0' && len < sizeof(msg) - 1; ++q)
msg[len++] = *q;
}
}
msg[len] = '\0';
return (pam_info(pamh, "%s", msg));
}
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
int argc __unused, const char *argv[] __unused)
{
return (PAM_SUCCESS);
}
PAM_EXTERN int
pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_close_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_chauthtok(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
if (flags & PAM_PRELIM_CHECK)
return (PAM_SUCCESS);
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_MODULE_ENTRY("pam_echo");
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