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<?php
/**
* The Auth_pam:: class provides a PAM-based implementation of the Horde
* authentication system.
*
* PAM (Pluggable Authentication Modules) is a flexible mechanism for
* authenticating users. It has become the standard authentication system for
* Linux, Solaris and FreeBSD.
*
* This implementation requires Chad Cunningham's pam_auth extension:
*
* http://www.math.ohio-state.edu/~ccunning/pam_auth/
*
* Optional parameters:<pre>
* 'service' The name of the PAM service to use when authenticating.
* DEFAULT: php</pre>
*
*
* $Horde: framework/Auth/Auth/pam.php,v 1.3.10.11 2006/01/01 21:28:07 jan Exp $
*
* Copyright 2004-2006 Jon Parise <jon@horde.org>
*
* 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 Jan Parise <jon@horde.org>
* @since Horde 3.0
* @package Horde_Auth
*/
class Auth_pam 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 PAM authentication object.
*
* @param array $params A hash containing connection parameters.
*/
function Auth_pam($params = array())
{
$this->_params = $params;
if (!empty($params['service'])) {
ini_set('pam_auth.servicename', $params['service']);
}
if (!extension_loaded('pam_auth')) {
dl('pam_auth.so');
}
}
/**
* Find out if a set of login credentials are valid.
*
* @access private
*
* @param string $userId The userId to check.
* @param array $credentials An array of login credentials.
*
* @return boolean Whether or not the credentials are valid.
*/
function _authenticate($userId, $credentials)
{
if (empty($credentials['password'])) {
Horde::fatal(_("No password provided for Login authentication."), __FILE__, __LINE__);
}
if (!extension_loaded('pam_auth')) {
Horde::fatal(_("PAM authentication is not available."), __FILE__, __LINE__);
}
if (!pam_auth($userId, $credentials['password'], &$error)) {
$this->_setAuthError(AUTH_REASON_MESSAGE, $error);
return false;
}
return true;
}
}
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