796 lines
25 KiB
PHP
Executable File
796 lines
25 KiB
PHP
Executable File
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Martin Jansen <mj@php.net> |
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// | Rui Hirokawa <hirokawa@php.net> |
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// | David Costa <gurugeek@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: Auth_HTTP.php,v 1.27 2005/04/04 12:48:33 hirokawa Exp $
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//
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require_once "Auth/Auth.php";
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define('AUTH_HTTP_NONCE_TIME_LEN', 16);
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define('AUTH_HTTP_NONCE_HASH_LEN', 32);
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// {{{ class Auth_HTTP
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/**
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* PEAR::Auth_HTTP
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*
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* The PEAR::Auth_HTTP class provides methods for creating an
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* HTTP authentication system based on RFC-2617 using PHP.
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*
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* Instead of generating an HTML driven form like PEAR::Auth
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* does, this class sends header commands to the clients which
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* cause them to present a login box like they are e.g. used
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* in Apache's .htaccess mechanism.
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*
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* This class requires the PEAR::Auth package.
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*
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* @notes The HTTP Digest Authentication part is based on
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* authentication class written by Tom Pike <tom.pike@xiven.com>
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*
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* @author Martin Jansen <mj@php.net>
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* @author Rui Hirokawa <hirokawa@php.net>
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* @author David Costa <gurugeek@php.net>
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* @package Auth_HTTP
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* @extends Auth
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* @version $Revision: 1.27 $
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*/
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class Auth_HTTP extends Auth
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{
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// {{{ properties
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/**
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* Authorization method: 'basic' or 'digest'
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*
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* @access public
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* @var string
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*/
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var $authType = 'basic';
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/**
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* Name of the realm for Basic Authentication
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*
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* @access public
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* @var string
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* @see drawLogin()
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*/
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var $realm = "protected area";
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/**
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* Text to send if user hits cancel button
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*
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* @access public
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* @var string
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* @see drawLogin()
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*/
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var $CancelText = "Error 401 - Access denied";
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/**
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* option array
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*
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* @access public
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* @var array
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*/
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var $options = array();
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/**
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* flag to indicate the nonce was stale.
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*
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* @access public
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* @var bool
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*/
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var $stale = false;
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/**
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* opaque string for digest authentication
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*
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* @access public
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* @var string
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*/
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var $opaque = 'dummy';
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/**
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* digest URI
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*
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* @access public
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* @var string
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*/
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var $uri = '';
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/**
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* authorization info returned by the client
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*
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* @access public
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* @var array
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*/
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var $auth = array();
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/**
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* next nonce value
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*
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* @access public
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* @var string
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*/
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var $nextNonce = '';
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/**
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* nonce value
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*
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* @access public
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* @var string
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*/
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var $nonce = '';
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/**
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* Holds a reference to the global server variable
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* @var array
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*/
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var $server;
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/**
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* Holds a reference to the global post variable
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* @var array
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*/
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var $post;
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/**
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* Holds a reference to the global cookie variable
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* @var array
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*/
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var $cookie;
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// }}}
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// {{{ Constructor
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/**
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* Constructor
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*
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* @param string Type of the storage driver
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* @param mixed Additional options for the storage driver
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* (example: if you are using DB as the storage
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* driver, you have to pass the dsn string here)
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*
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* @return void
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*/
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function Auth_HTTP($storageDriver, $options = '')
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{
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/* set default values for options */
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$this->options = array('cryptType' => 'md5',
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'algorithm' => 'MD5',
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'qop' => 'auth-int,auth',
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'opaquekey' => 'moo',
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'noncekey' => 'moo',
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'digestRealm' => 'protected area',
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'forceDigestOnly' => false,
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'nonceLife' => 300,
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'sessionSharing' => true,
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);
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if (!empty($options['authType'])) {
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$this->authType = strtolower($options['authType']);
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}
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if (is_array($options)) {
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foreach($options as $key => $value) {
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if (array_key_exists( $key, $this->options)) {
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$this->options[$key] = $value;
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}
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}
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if (!empty($this->options['opaquekey'])) {
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$this->opaque = md5($this->options['opaquekey']);
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}
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}
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$this->Auth($storageDriver, $options);
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}
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// }}}
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// {{{ assignData()
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/**
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* Assign values from $PHP_AUTH_USER and $PHP_AUTH_PW or 'Authorization' header
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* to internal variables and sets the session id based
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* on them
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*
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* @access public
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* @return void
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*/
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function assignData()
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{
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if (method_exists($this, '_importGlobalVariable')) {
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$this->server = &$this->_importGlobalVariable('server');
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}
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if ($this->authType == 'basic') {
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if (!empty($this->server['PHP_AUTH_USER'])) {
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$this->username = $this->server['PHP_AUTH_USER'];
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}
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if (!empty($this->server['PHP_AUTH_PW'])) {
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$this->password = $this->server['PHP_AUTH_PW'];
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}
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/**
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* Try to get authentication information from IIS
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*/
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if (empty($this->username) && empty($this->password)) {
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if (!empty($this->server['HTTP_AUTHORIZATION'])) {
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list($this->username, $this->password) =
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explode(':', base64_decode(substr($this->server['HTTP_AUTHORIZATION'], 6)));
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}
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}
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} elseif ($this->authType == 'digest') {
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$this->username = '';
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$this->password = '';
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$this->digest_header = null;
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if (!empty($this->server['PHP_AUTH_DIGEST'])) {
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$this->digest_header = substr($this->server['PHP_AUTH_DIGEST'],
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strpos($this->server['PHP_AUTH_DIGEST'],' ')+1);
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} else {
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$headers = getallheaders();
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if(isset($headers['Authorization']) && !empty($headers['Authorization'])) {
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$this->digest_header = substr($headers['Authorization'],
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strpos($headers['Authorization'],' ')+1);
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}
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}
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if($this->digest_header) {
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$authtemp = explode(',', $this->digest_header);
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$auth = array();
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foreach($authtemp as $key => $value) {
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$value = trim($value);
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if(strpos($value,'=') !== false) {
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$lhs = substr($value,0,strpos($value,'='));
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$rhs = substr($value,strpos($value,'=')+1);
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if(substr($rhs,0,1) == '"' && substr($rhs,-1,1) == '"') {
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$rhs = substr($rhs,1,-1);
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}
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$auth[$lhs] = $rhs;
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}
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}
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}
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if (!isset($auth['uri']) || !isset($auth['realm'])) {
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return;
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}
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if ($this->selfURI() == $auth['uri']) {
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$this->uri = $auth['uri'];
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if (substr($headers['Authorization'],0,7) == 'Digest ') {
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$this->authType = 'digest';
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if (!isset($auth['nonce']) || !isset($auth['username']) ||
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!isset($auth['response']) || !isset($auth['qop']) ||
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!isset($auth['nc']) || !isset($auth['cnonce'])){
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return;
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}
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if ($auth['qop'] != 'auth' && $auth['qop'] != 'auth-int') {
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return;
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}
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$this->stale = $this->_judgeStale($auth['nonce']);
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if ($this->nextNonce == false) {
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return;
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}
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$this->username = $auth['username'];
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$this->password = $auth['response'];
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$this->auth['nonce'] = $auth['nonce'];
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$this->auth['qop'] = $auth['qop'];
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$this->auth['nc'] = $auth['nc'];
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$this->auth['cnonce'] = $auth['cnonce'];
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if (isset($auth['opaque'])) {
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$this->auth['opaque'] = $auth['opaque'];
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}
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} elseif (substr($headers['Authorization'],0,6) == 'Basic ') {
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if ($this->options['forceDigestOnly']) {
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return; // Basic authentication is not allowed.
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}
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$this->authType = 'basic';
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list($username, $password) =
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explode(':',base64_decode(substr($headers['Authorization'],6)));
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$this->username = $username;
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$this->password = $password;
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}
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}
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} else {
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return PEAR::raiseError('authType is invalid.');
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}
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if ($this->options['sessionSharing'] &&
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isset($this->username) && isset($this->password)) {
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session_id(md5('Auth_HTTP' . $this->username . $this->password));
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}
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/**
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* set sessionName for AUTH, so that the sessionName is different
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* for distinct realms
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*/
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$this->_sessionName = "_authhttp".md5($this->realm);
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}
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// }}}
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// {{{ login()
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/**
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* Login function
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*
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* @access private
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* @return void
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*/
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function login()
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{
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$login_ok = false;
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if (method_exists($this, '_loadStorage')) {
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$this->_loadStorage();
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}
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$this->storage->_auth_obj->_sessionName =& $this->_sessionName;
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/**
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* When the user has already entered a username,
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* we have to validate it.
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*/
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if (!empty($this->username) && !empty($this->password)) {
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if ($this->authType == 'basic' && !$this->options['forceDigestOnly']) {
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if (true === $this->storage->fetchData($this->username, $this->password)) {
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$login_ok = true;
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}
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} else { /* digest authentication */
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if (!$this->getAuth() || $this->getAuthData('a1') == null) {
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/*
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* note:
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* - only PEAR::DB is supported as container.
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* - password should be stored in container as plain-text
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* (if $options['cryptType'] == 'none') or
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* A1 hashed form (md5('username:realm:password'))
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* (if $options['cryptType'] == 'md5')
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*/
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$dbs = $this->storage;
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if (!DB::isConnection($dbs->db)) {
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$dbs->_connect($dbs->options['dsn']);
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}
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$query = 'SELECT '.$dbs->options['passwordcol']." FROM ".$dbs->options['table'].
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' WHERE '.$dbs->options['usernamecol']." = '".
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$dbs->db->quoteString($this->username)."' ";
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$pwd = $dbs->db->getOne($query); // password stored in container.
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if (DB::isError($pwd)) {
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return PEAR::raiseError($pwd->getMessage(), $pwd->getCode());
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}
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if ($this->options['cryptType'] == 'none') {
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$a1 = md5($this->username.':'.$this->options['digestRealm'].':'.$pwd);
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} else {
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$a1 = $pwd;
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}
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$this->setAuthData('a1', $a1, true);
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} else {
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$a1 = $this->getAuthData('a1');
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}
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$login_ok = $this->validateDigest($this->password, $a1);
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if ($this->nextNonce == false) {
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$login_ok = false;
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}
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}
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if (!$login_ok && is_callable($this->loginFailedCallback)) {
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call_user_func($this->loginFailedCallback,$this->username, $this);
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}
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}
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if (!empty($this->username) && $login_ok) {
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$this->setAuth($this->username);
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if (is_callable($this->loginCallback)) {
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call_user_func($this->loginCallback,$this->username, $this);
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}
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}
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/**
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* If the login failed or the user entered no username,
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* output the login screen again.
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*/
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if (!empty($this->username) && !$login_ok) {
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$this->status = AUTH_WRONG_LOGIN;
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}
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if ((empty($this->username) || !$login_ok) && $this->showLogin) {
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$this->drawLogin($this->storage->activeUser);
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return;
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}
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if (!empty($this->username) && $login_ok && $this->authType == 'digest'
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&& $this->auth['qop'] == 'auth') {
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$this->authenticationInfo();
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}
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}
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// }}}
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// {{{ drawLogin()
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/**
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* Launch the login box
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*
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* @param string $username Username
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* @return void
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* @access private
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*/
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function drawLogin($username = "")
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{
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/**
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* Send the header commands
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*/
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if ($this->authType == 'basic') {
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header("WWW-Authenticate: Basic realm=\"".$this->realm."\"");
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header('HTTP/1.0 401 Unauthorized');
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} else if ($this->authType == 'digest') {
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$this->nonce = $this->_getNonce();
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$wwwauth = 'WWW-Authenticate: Digest ';
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$wwwauth .= 'qop="'.$this->options['qop'].'", ';
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$wwwauth .= 'algorithm='.$this->options['algorithm'].', ';
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$wwwauth .= 'realm="'.$this->options['digestRealm'].'", ';
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$wwwauth .= 'nonce="'.$this->nonce.'", ';
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if ($this->stale) {
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$wwwauth .= 'stale=true, ';
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}
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if (!empty($this->opaque)) {
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$wwwauth .= 'opaque="'.$this->opaque.'"' ;
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}
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$wwwauth .= "\r\n";
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if (!$this->options['forceDigestOnly']) {
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$wwwauth .= 'WWW-Authenticate: Basic realm="'.$this->realm.'"';
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}
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header($wwwauth);
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header('HTTP/1.0 401 Unauthorized');
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}
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/**
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* This code is only executed if the user hits the cancel
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* button or if he enters wrong data 3 times.
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*/
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if ($this->stale) {
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echo 'Stale nonce value, please re-authenticate.';
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} else {
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echo $this->CancelText;
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}
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exit;
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}
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// }}}
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// {{{ setRealm()
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/**
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* Set name of the current realm
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*
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* @access public
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* @param string $realm Name of the realm
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* @param string $digestRealm Name of the realm for digest authentication
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* @return void
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*/
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function setRealm($realm, $digestRealm = '')
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{
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$this->realm = $realm;
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if (!empty($digestRealm)) {
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$this->options['digestRealm'] = $digestRealm;
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}
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}
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// }}}
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// {{{ setCancelText()
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/**
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* Set the text to send if user hits the cancel button
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*
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* @access public
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* @param string $text Text to send
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* @return void
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*/
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function setCancelText($text)
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{
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$this->CancelText = $text;
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}
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// }}}
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// {{{ validateDigest()
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/**
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* judge if the client response is valid.
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*
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* @access private
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* @param string $response client response
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* @param string $a1 password or hashed password stored in container
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* @return bool true if success, false otherwise
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*/
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function validateDigest($response, $a1)
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{
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if (method_exists($this, '_importGlobalVariable')) {
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$this->server = &$this->_importGlobalVariable('server');
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}
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$a2unhashed = $this->server['REQUEST_METHOD'].":".$this->selfURI();
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if($this->auth['qop'] == 'auth-int') {
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if(isset($GLOBALS["HTTP_RAW_POST_DATA"])) {
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// In PHP < 4.3 get raw POST data from this variable
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$body = $GLOBALS["HTTP_RAW_POST_DATA"];
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} else if($lines = @file('php://input')) {
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// In PHP >= 4.3 get raw POST data from this file
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$body = implode("\n", $lines);
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} else {
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if (method_exists($this, '_importGlobalVariable')) {
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$this->post = &$this->_importGlobalVariable('post');
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}
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$body = '';
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foreach($this->post as $key => $value) {
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if($body != '') $body .= '&';
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$body .= rawurlencode($key) . '=' . rawurlencode($value);
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}
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}
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$a2unhashed .= ':'.md5($body);
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}
|
|
|
|
$a2 = md5($a2unhashed);
|
|
$combined = $a1.':'.
|
|
$this->auth['nonce'].':'.
|
|
$this->auth['nc'].':'.
|
|
$this->auth['cnonce'].':'.
|
|
$this->auth['qop'].':'.
|
|
$a2;
|
|
$expectedResponse = md5($combined);
|
|
|
|
if(!isset($this->auth['opaque']) || $this->auth['opaque'] == $this->opaque) {
|
|
if($response == $expectedResponse) { // password is valid
|
|
if(!$this->stale) {
|
|
return true;
|
|
} else {
|
|
$this->drawLogin();
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _judgeStale()
|
|
|
|
/**
|
|
* judge if nonce from client is stale.
|
|
*
|
|
* @access private
|
|
* @param string $nonce nonce value from client
|
|
* @return bool stale
|
|
*/
|
|
function _judgeStale($nonce)
|
|
{
|
|
$stale = false;
|
|
|
|
if(!$this->_decodeNonce($nonce, $time, $hash_cli)) {
|
|
$this->nextNonce = false;
|
|
$stale = true;
|
|
return $stale;
|
|
}
|
|
|
|
if ($time < time() - $this->options['nonceLife']) {
|
|
$this->nextNonce = $this->_getNonce();
|
|
$stale = true;
|
|
} else {
|
|
$this->nextNonce = $nonce;
|
|
}
|
|
|
|
return $stale;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _nonceDecode()
|
|
|
|
/**
|
|
* decode nonce string
|
|
*
|
|
* @access private
|
|
* @param string $nonce nonce value from client
|
|
* @param string $time decoded time
|
|
* @param string $hash decoded hash
|
|
* @return bool false if nonce is invalid
|
|
*/
|
|
function _decodeNonce($nonce, &$time, &$hash)
|
|
{
|
|
if (method_exists($this, '_importGlobalVariable')) {
|
|
$this->server = &$this->_importGlobalVariable('server');
|
|
}
|
|
|
|
if (strlen($nonce) != AUTH_HTTP_NONCE_TIME_LEN + AUTH_HTTP_NONCE_HASH_LEN) {
|
|
return false;
|
|
}
|
|
|
|
$time = base64_decode(substr($nonce, 0, AUTH_HTTP_NONCE_TIME_LEN));
|
|
$hash_cli = substr($nonce, AUTH_HTTP_NONCE_TIME_LEN, AUTH_HTTP_NONCE_HASH_LEN);
|
|
|
|
$hash = md5($time . $this->server['HTTP_USER_AGENT'] . $this->options['noncekey']);
|
|
|
|
if ($hash_cli != $hash) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _getNonce()
|
|
|
|
/**
|
|
* return nonce to detect timeout
|
|
*
|
|
* @access private
|
|
* @return string nonce value
|
|
*/
|
|
function _getNonce()
|
|
{
|
|
if (method_exists($this, '_importGlobalVariable')) {
|
|
$this->server = &$this->_importGlobalVariable('server');
|
|
}
|
|
|
|
$time = time();
|
|
$hash = md5($time . $this->server['HTTP_USER_AGENT'] . $this->options['noncekey']);
|
|
|
|
return base64_encode($time) . $hash;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ authenticationInfo()
|
|
|
|
/**
|
|
* output HTTP Authentication-Info header
|
|
*
|
|
* @notes md5 hash of contents is required if 'qop' is 'auth-int'
|
|
*
|
|
* @access private
|
|
* @param string MD5 hash of content
|
|
*/
|
|
function authenticationInfo($contentMD5 = '') {
|
|
|
|
if($this->getAuth() && ($this->getAuthData('a1') != null)) {
|
|
$a1 = $this->getAuthData('a1');
|
|
|
|
// Work out authorisation response
|
|
$a2unhashed = ":".$this->selfURI();
|
|
if($this->auth['qop'] == 'auth-int') {
|
|
$a2unhashed .= ':'.$contentMD5;
|
|
}
|
|
$a2 = md5($a2unhashed);
|
|
$combined = $a1.':'.
|
|
$this->nonce.':'.
|
|
$this->auth['nc'].':'.
|
|
$this->auth['cnonce'].':'.
|
|
$this->auth['qop'].':'.
|
|
$a2;
|
|
|
|
// Send authentication info
|
|
$wwwauth = 'Authentication-Info: ';
|
|
if($this->nonce != $this->nextNonce) {
|
|
$wwwauth .= 'nextnonce="'.$this->nextNonce.'", ';
|
|
}
|
|
$wwwauth .= 'qop='.$this->auth['qop'].', ';
|
|
$wwwauth .= 'rspauth="'.md5($combined).'", ';
|
|
$wwwauth .= 'cnonce="'.$this->auth['cnonce'].'", ';
|
|
$wwwauth .= 'nc='.$this->auth['nc'].'';
|
|
header($wwwauth);
|
|
}
|
|
}
|
|
// }}}
|
|
// {{{ setOption()
|
|
/**
|
|
* set authentication option
|
|
*
|
|
* @access public
|
|
* @param mixed $name key of option
|
|
* @param mixed $value value of option
|
|
* @return void
|
|
*/
|
|
function setOption($name, $value = null)
|
|
{
|
|
if (is_array($name)) {
|
|
foreach($name as $key => $value) {
|
|
if (array_key_exists( $key, $this->options)) {
|
|
$this->options[$key] = $value;
|
|
}
|
|
}
|
|
} else {
|
|
if (array_key_exists( $name, $this->options)) {
|
|
$this->options[$name] = $value;
|
|
}
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getOption()
|
|
/**
|
|
* get authentication option
|
|
*
|
|
* @access public
|
|
* @param string $name key of option
|
|
* @return mixed option value
|
|
*/
|
|
function getOption($name)
|
|
{
|
|
if (array_key_exists( $name, $this->options)) {
|
|
return $this->options[$name];
|
|
}
|
|
if ($name == 'CancelText') {
|
|
return $this->CancelText;
|
|
}
|
|
if ($name == 'Realm') {
|
|
return $this->realm;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ selfURI()
|
|
/**
|
|
* get self URI
|
|
*
|
|
* @access public
|
|
* @return string self URI
|
|
*/
|
|
function selfURI()
|
|
{
|
|
if (method_exists($this, '_importGlobalVariable')) {
|
|
$this->server = &$this->_importGlobalVariable('server');
|
|
}
|
|
|
|
if (preg_match("/MSIE/",$this->server['HTTP_USER_AGENT'])) {
|
|
// query string should be removed for MSIE
|
|
$uri = preg_replace("/^(.*)\?/","\\1",$this->server['REQUEST_URI']);
|
|
} else {
|
|
$uri = $this->server['REQUEST_URI'];
|
|
}
|
|
return $uri;
|
|
}
|
|
|
|
// }}}
|
|
|
|
}
|
|
|
|
// }}}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|
|
?>
|