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pictcode / lib / Cake / Network / Http / DigestAuthentication.php @ 635eef61

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<?php
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/**
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 * Digest authentication
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 *
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 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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 *
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 * Licensed under The MIT License
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 * For full copyright and license information, please see the LICENSE.txt
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 * Redistributions of files must retain the above copyright notice.
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 *
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 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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 * @link          http://cakephp.org CakePHP(tm) Project
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 * @package       Cake.Network.Http
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 * @since         CakePHP(tm) v 2.0.0
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 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
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 */
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/**
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 * Digest authentication
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 *
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 * @package       Cake.Network.Http
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 */
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class DigestAuthentication {
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/**
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 * Authentication
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 *
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 * @param HttpSocket $http Http socket instance.
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 * @param array &$authInfo Authentication info.
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 * @return void
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 * @link http://www.ietf.org/rfc/rfc2617.txt
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 */
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        public static function authentication(HttpSocket $http, &$authInfo) {
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                if (isset($authInfo['user'], $authInfo['pass'])) {
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                        if (!isset($authInfo['realm']) && !static::_getServerInformation($http, $authInfo)) {
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                                return;
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                        }
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                        $http->request['header']['Authorization'] = static::_generateHeader($http, $authInfo);
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                }
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        }
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/**
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 * Retrieve information about the authentication
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 *
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 * @param HttpSocket $http Http socket instance.
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 * @param array &$authInfo Authentication info.
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 * @return bool
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 */
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        protected static function _getServerInformation(HttpSocket $http, &$authInfo) {
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                $originalRequest = $http->request;
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                $http->configAuth(false);
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                $http->request($http->request);
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                $http->request = $originalRequest;
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                $http->configAuth('Digest', $authInfo);
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                if (empty($http->response['header']['WWW-Authenticate'])) {
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                        return false;
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                }
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                preg_match_all('@(\w+)=(?:(?:")([^"]+)"|([^\s,$]+))@', $http->response['header']['WWW-Authenticate'], $matches, PREG_SET_ORDER);
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                foreach ($matches as $match) {
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                        $authInfo[$match[1]] = $match[2];
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                }
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                if (!empty($authInfo['qop']) && empty($authInfo['nc'])) {
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                        $authInfo['nc'] = 1;
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                }
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                return true;
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        }
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/**
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 * Generate the header Authorization
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 *
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 * @param HttpSocket $http Http socket instance.
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 * @param array &$authInfo Authentication info.
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 * @return string
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 */
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        protected static function _generateHeader(HttpSocket $http, &$authInfo) {
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                $a1 = md5($authInfo['user'] . ':' . $authInfo['realm'] . ':' . $authInfo['pass']);
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                $a2 = md5($http->request['method'] . ':' . $http->request['uri']['path']);
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                if (empty($authInfo['qop'])) {
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                        $response = md5($a1 . ':' . $authInfo['nonce'] . ':' . $a2);
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                } else {
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                        $authInfo['cnonce'] = uniqid();
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                        $nc = sprintf('%08x', $authInfo['nc']++);
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                        $response = md5($a1 . ':' . $authInfo['nonce'] . ':' . $nc . ':' . $authInfo['cnonce'] . ':auth:' . $a2);
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                }
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                $authHeader = 'Digest ';
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                $authHeader .= 'username="' . str_replace(array('\\', '"'), array('\\\\', '\\"'), $authInfo['user']) . '", ';
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                $authHeader .= 'realm="' . $authInfo['realm'] . '", ';
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                $authHeader .= 'nonce="' . $authInfo['nonce'] . '", ';
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                $authHeader .= 'uri="' . $http->request['uri']['path'] . '", ';
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                $authHeader .= 'response="' . $response . '"';
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                if (!empty($authInfo['opaque'])) {
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                        $authHeader .= ', opaque="' . $authInfo['opaque'] . '"';
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                }
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                if (!empty($authInfo['qop'])) {
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                        $authHeader .= ', qop="auth", nc=' . $nc . ', cnonce="' . $authInfo['cnonce'] . '"';
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                }
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                return $authHeader;
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        }
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}