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<?php
/**
* The Auth_radius class provides a RADIUS implementation of the Horde
* authentication system.
*
* This class requires the 'radius' PECL extension.
* RADIUS PECL extension: http://pecl.php.net/package/radius
*
* On *nix-y machines, this extension can be installed as follows:<pre>
* "pear install radius"</pre>
*
* Then, edit your php.ini file and make sure the following line is present:<pre>
* For Windows machines: extension=php_radius.dll
* For all others: extension=radius.so</pre>
*
* Required parameters:<pre>
* 'host' The RADIUS host to use (IP address or fully qualified
* hostname).
* 'method' The RADIUS method to use for validating the request.
* Either: 'PAP', 'CHAP_MD5', 'MSCHAPv1', or 'MSCHAPv2'.
* ** CURRENTLY, only 'PAP' is supported. **
* 'secret' The RADIUS shared secret string for the host. The
* RADIUS protocol ignores all but the leading 128 bytes
* of the shared secret.</pre>
*
* Optional parameters:<pre>
* 'nas' The RADIUS NAS identifier to use.
* DEFAULT: The value of $_SERVER['HTTP_HOST'] or, if not
* defined, then 'localhost'.
* 'port' The port to use on the RADIUS server.
* DEFAULT: Whatever the local system identifies as the
* 'radius' UDP port
* 'retries' The maximum number of repeated requests to make before
* giving up.
* DEFAULT: 3
* 'suffix' The domain name to add to unqualified user names.
* DEFAULT: NONE
* 'timeout' The timeout for receiving replies from the server (in
* seconds).
* DEFAULT: 3 seconds</pre>
*
*
* $Horde: framework/Auth/Auth/radius.php,v 1.24.8.8 2006/01/01 21:28:07 jan Exp $
*
* Copyright 2002-2006 Michael Slusarz <slusarz@bigworm.colorado.edu>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Michael Slusarz <slusarz@bigworm.colorado.edu>
* @since Horde 3.0
* @package Horde_Auth
*/
class Auth_radius extends Auth {
/**
* An array of capabilities, so that the driver can report which
* operations it supports and which it doesn't.
*
* @var array
*/
var $capabilities = array('add' => false,
'update' => false,
'resetpassword' => false,
'remove' => false,
'list' => false,
'transparent' => false);
/**
* Constructs a new RADIUS authentication object.
*
* @param array $params A hash containing connection parameters.
*/
function Auth_radius($params = array())
{
if (!Util::extensionExists('radius')) {
Horde::fatal('Auth_radius requires the radius PECL extension to be loaded.', __FILE__, __LINE__);
}
$this->_setParams($params);
}
/**
* Set parameters.
*
* @access private
*
* @param array $params The parameter hash.
*/
function _setParams($params)
{
/* A RADIUS host is required. */
if (empty($params['host'])) {
Horde::fatal('Auth_radius requires a RADIUS host to connect to.', __FILE__, __LINE__);
}
/* A RADIUS secret string is required. */
if (empty($params['secret'])) {
Horde::fatal('Auth_radius requires a RADIUS secret string.', __FILE__, __LINE__);
}
/* A RADIUS authentication method is required. */
if (empty($params['method'])) {
Horde::fatal('Auth_radius requires a RADIUS authentication method.', __FILE__, __LINE__);
}
/* RADIUS NAS Identifier. */
if (empty($params['nas'])) {
$params['nas'] = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'
] : 'localhost';
}
/* Suffix to add to unqualified user names. */
if (empty($params['suffix'])) {
$params['suffix'] = '';
}
/* The RADIUS port to use. */
if (empty($params['port'])) {
$params['port'] = 0;
}
/* Maximum number of retries. */
if (empty($params['retries'])) {
$params['retries'] = 3;
}
/* RADIUS timeout. */
if (empty($params['timeout'])) {
$params['timeout'] = 3;
}
$this->_params = $params;
}
/**
* Find out if a set of login credentials are valid.
*
* @access private
*
* @param string $username The userId to check.
* @param array $credentials An array of login credentials.
* For radius, this must contain a password
* entry.
*
* @return boolean Whether or not the credentials are valid.
*/
function _authenticate($username, $credentials)
{
/* Password is required. */
if (!isset($credentials['password'])) {
Horde::fatal(_("Password required for RADIUS authentication."), __FILE__, __LINE__);
}
$res = radius_auth_open();
radius_add_server($res, $this->_params['host'], $this->_params['port'], $this->_params['secret'], $this->_params['timeout'], $this->_params['retries']);
radius_create_request($res, RADIUS_ACCESS_REQUEST);
radius_put_attr($res, RADIUS_NAS_IDENTIFIER, $this->_params['nas']);
radius_put_attr($res, RADIUS_NAS_PORT_TYPE, RADIUS_VIRTUAL);
radius_put_attr($res, RADIUS_SERVICE_TYPE, RADIUS_FRAMED);
radius_put_attr($res, RADIUS_FRAMED_PROTOCOL, RADIUS_PPP);
radius_put_attr($res, RADIUS_CALLING_STATION_ID, isset($_SERVER['REMOTE_HOST']) ? $_SERVER['REMOTE_HOST'] : '127.0.0.1');
/* Insert username/password into request. */
radius_put_attr($res, RADIUS_USER_NAME, $username);
radius_put_attr($res, RADIUS_USER_PASSWORD, $credentials['password']);
/* Send request. */
$success = radius_send_request($res);
switch ($success) {
case RADIUS_ACCESS_ACCEPT:
return true;
case RADIUS_ACCESS_REJECT:
$this->_setAuthError(AUTH_REASON_MESSAGE, _("Authentication rejected by RADIUS server."));
return false;
default:
$this->_setAuthError(AUTH_REASON_MESSAGE, radius_strerror($res));
return false;
}
}
}
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