/usr/share/php/Horde/Auth/Pam.php is in php-horde-auth 2.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Copyright 2004-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you did
* not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Jon Parise <jon@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Auth
*/
/**
* The Horde_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 driver relies on the PECL PAM package:
*
* http://pecl.php.net/package/PAM
*
* @author Jon Parise <jon@horde.org>
* @category Horde
* @copyright 2004-2017 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Auth
*/
class Horde_Auth_Pam extends Horde_Auth_Base
{
/**
* Constructor.
*
* @param array $params Optional parameters:
* <pre>
* 'service' - (string) The name of the PAM service to use when
* authenticating.
* DEFAULT: php
* </pre>
*
* @throws Horde_Auth_Exception
*/
public function __construct(array $params = array())
{
if (!Horde_Util::extensionExists('pam')) {
throw new Horde_Auth_Exception('PAM authentication is not available.');
}
if (!empty($params['service'])) {
ini_set('pam.servicename', $params['service']);
}
parent::__construct($params);
}
/**
* Find out if a set of login credentials are valid.
*
* @param string $userId The userId to check.
* @param array $credentials An array of login credentials.
*
* @throws Horde_Auth_Exception
*/
protected function _authenticate($userId, $credentials)
{
if (empty($credentials['password'])) {
throw new Horde_Auth_Exception('', Horde_Auth::REASON_BADLOGIN);
}
$error = null;
if (!pam_auth($userId, $credentials['password'], $error)) {
throw new Horde_Auth_Exception($error);
}
}
}
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