mirror of
https://github.com/EGroupware/egroupware.git
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880 lines
27 KiB
PHP
880 lines
27 KiB
PHP
<?php
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/**
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* EGroupware: iSchedule server
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage groupdav
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2012-13 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @version $Id$
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*/
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/**
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* iSchedule server: serverside of iSchedule
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*
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* @link https://tools.ietf.org/html/draft-desruisseaux-ischedule-03 iSchedule draft from 2013-01-22
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*
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* groupdav get's extended here to get it's logging, should separate that out ...
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*/
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class ischedule_server extends groupdav
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{
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/**
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* iSchedule xml namespace
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*/
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const ISCHEDULE = 'urn:ietf:params:xml:ns:ischedule';
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/**
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* Own iSchedule version
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*/
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const VERSION = '1.0';
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/**
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* Supported versions for capablities
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*
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* Might be more then current version above
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*
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* @var array
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*/
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static $supported_versions = array(self::VERSION);
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/**
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* Required headers in DKIM signature (DKIM-Signature is always a required header!)
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*/
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const REQUIRED_DKIM_HEADERS = 'iSchedule-Version:Content-Type:Originator:Recipient';
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/**
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* Constructor
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*/
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public function __construct()
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{
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// install our own exception handler sending exceptions as http status
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set_exception_handler(array(__CLASS__, 'exception_handler'));
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self::$instance = $this;
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}
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/**
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* Serve an iSchedule request
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*/
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public function ServeRequest()
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{
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self::$log_level = $GLOBALS['egw_info']['user']['preferences']['groupdav']['debug_level'];
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self::$log_level = 'f';
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if (self::$log_level === 'r' || self::$log_level === 'f' || $this->debug)
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{
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self::$request_starttime = microtime(true);
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$this->store_request = true;
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ob_start();
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}
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// get raw request body
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$this->request = file_get_contents('php://input');
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switch($_SERVER['REQUEST_METHOD'])
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{
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case 'GET':
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$this->get();
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break;
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case 'POST':
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$this->post();
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break;
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default:
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error_log(__METHOD__."() invalid iSchedule request using {$_SERVER['REQUEST_METHOD']}!");
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header("HTTP/1.1 400 Bad Request");
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}
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if (self::$request_starttime) self::log_request();
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}
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/**
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* List of supported components and methods
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*
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* @var array
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*/
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static $supported_components = array(
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'VFREEBUSY' => array('REQUEST'),
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'VEVENT' => array('REQUEST', 'REPLY', 'CANCEL'),
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//'VTODO' => array('REQUEST', 'REPLY', 'CANCEL'),
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);
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/**
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* List of supported calendar-data-types
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*
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* @var array
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*/
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static $supported_calendar_data_types = array(
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array('content-type' => 'text/calendar', 'version' => '2.0'),
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);
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/**
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* Supported attachment types for capabilities
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*
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* @var array
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*/
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static $supported_attachments = array('external', 'inline');
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/**
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* Other capablities
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*
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* @var array name => value pairs
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*/
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static $capablities = array(
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'max-content-length' => 102400,
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'min-date-time' => '19910101T000000Z',
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'max-date-time' => '20381231T000000Z',
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'max-instances' => 150,
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'max-recipients' => 250,
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// for server config: 'administrator' => 'mailto:ischedule-admin@example.com</administrator',
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);
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/**
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* Requiremnt for originator to match depending on method
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*
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* @var array method => array('ORGANIZER','ATTENDEE')
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* @link https://tools.ietf.org/html/draft-desruisseaux-ischedule-03#section-6.1
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*/
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static $supported_method2origin_requirement = array(
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//'PUBLISH' => null, // no requirement
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'REQUEST' => array('ORGANIZER', 'ATTENDEE'),
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'REPLY' => array('ATTENDEE'),
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'ADD' => array('ORGANIZER'),
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'CANCEL' => array('ORGANIZER'),
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//'REFRESH' => null,
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//'COUNTER' => array('ATTENDEE'),
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//'DECLINECOUNTER' => array('ORGANIZER'),
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);
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/**
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* Serve an iSchedule POST request
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*/
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public function post()
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{
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// get and verify required headers
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$headers = array();
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foreach($_SERVER as $name => $value)
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{
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$name = strtolower(str_replace('_', '-', $name));
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list($first, $rest) = explode('-', $name, 2);
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switch($first)
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{
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case 'content':
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$headers[$name] = $value;
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break;
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case 'http':
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$headers[$rest] = $value;
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break;
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}
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}
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if (($missing = array_diff(explode(':', strtolower(self::REQUIRED_DKIM_HEADERS.':DKIM-Signature')), array_keys($headers))))
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{
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//error_log('headers='.array2string(array_keys($headers)).', required='.self::REQUIRED_DKIM_HEADERS.', missing='.array($missing));
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if (in_array('originator', $missing))
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{
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$error = 'originator-missing';
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}
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elseif(in_array('recipient', $missing))
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{
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$error = 'recipient-missing';
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}
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else
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{
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$error = 'invalid-scheduling-message';
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}
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throw new Exception ("Bad Request: $error: missing required headers: ".implode(', ', $missing), 400);
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}
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// validate dkim signature
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// for multivalued Recipient header: as PHP engine agregates them ", " separated,
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// we cant tell it apart from ", " separated recipients in one header, therefore we try to validate both.
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// It will fail if multiple recipients in a single header are also ", " separated (just comma works fine)
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if (!self::dkim_validate($headers, $this->request, $error))
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{
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throw new Exception('Bad Request: verification-failed: DKIM signature invalid: '.$error, 400);
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}
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// check if recipient is a user
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// todo: multiple recipients, currently we use last recipient for EGroupware enviroment
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// it is no error, to not specify a correct user, in that case we return just a request-status of "3.7;Invalid Calendar User"!
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//foreach(preg_split('/, */', $headers['recipient']) as $recipient)
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/*{
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if (!stripos($recipient, 'mailto:') === 0 ||
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!($account_id = $GLOBALS['egw']->accounts->name2id(substr($recipient, 7), 'account_email')))
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{
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throw new Exception("Bad Request: recipient-missing: unknown recipient '$recipient'", 400);
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}
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}
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// create enviroment for recipient user, as we act on his behalf
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$GLOBALS['egw']->session->account_id = $account_id;
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$GLOBALS['egw']->session->account_lid = $GLOBALS['egw']->accounts->id2name($account_id);
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//$GLOBALS['egw']->session->account_domain = $domain;
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$GLOBALS['egw_info']['user'] = $GLOBALS['egw']->session->read_repositories();
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translation::init();
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*/
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// check originator is allowed to iSchedule with recipient
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// ToDo: preference for user/admin to specify with whom to iSchedule: $allowed_origins
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$allowed_origins = preg_split('/, ?/', $GLOBALS['egw_info']['user']['preferences']['groupdav']['ischedule_allowed_origins']);
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/* disabled 'til UI is ready to specifiy
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* ToDo: this should be no error but a response-status of "3.8;No authority"
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list(,$originator_domain) = explode('@', $headers['Originator']);
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if (!in_array($headers['Originator'], $allowed_orgins) && !in_array($originator_domain, $allowed_origins))
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{
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throw new Exception('Forbidden', 403);
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}*/
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// check method and component of Content-Type are valid
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// ToDo: no component or method in Content-Type should give an "invalid-scheduling-message" error
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// only unsupported (not in capablities) component should give "invalid-caledar-data-type"
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if (!preg_match('/component=([^;]+)/i', $headers['content-type'], $matches) ||
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(!in_array($component=strtoupper($matches[1]), self::$supported_components)))
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{
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throw new Exception ('Bad Request: invalid-calendar-data-type: missing or unsupported component in Content-Type header', 400);
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}
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if (!preg_match('/method=([^;]+)/i', $headers['content-type'], $matches) ||
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(!isset(self::$supported_method2origin_requirement[$method=strtoupper($matches[1])])) ||
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$component == 'VFREEBUSY' && $method != 'REQUEST')
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{
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throw new Exception ('Bad Request: missing or unsupported method in Content-Type header', 400);
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}
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// parse iCal
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// code copied from calendar_groupdav::outbox_freebusy_request for now
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include_once EGW_SERVER_ROOT.'/phpgwapi/inc/horde/lib/core.php';
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$vcal = new Horde_iCalendar();
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if (!$vcal->parsevCalendar($this->request, 'VCALENDAR', 'utf-8'))
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{
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throw new Exception('Bad Request: invalid-calendar-data: Failed parsing iCal', 400);
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}
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$version = $vcal->getAttribute('VERSION');
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$handler = new calendar_ical();
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$handler->setSupportedFields('GroupDAV',$this->agent);
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$handler->calendarOwner = $handler->user = 0; // to NOT default owner/organizer to something
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if (!($vcal_comp = $vcal->getComponent(0)) ||
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!($event = $handler->vevent2egw($vcal_comp, $version, $handler->supportedFields,
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$principalURL='', $check_component='Horde_iCalendar_'.strtolower($component))))
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{
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throw new Exception('Bad Request: invalid-calendar-data: Failed converting iCal', 400);
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}
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// validate originator matches organizer or attendee
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$originator_requirement = self::$supported_method2origin_requirement[$method];
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if (isset($originator_requirement))
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{
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$matches = false;
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foreach($originator_requirement as $requirement)
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{
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$originator = $headers['originator'];
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if (stripos($originator, 'mailto:') === 0) $originator = substr($originator, 7);
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if ($requirement == 'ORGANIZER' &&
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($event['organizer'] == $originator || strpos($event['organizer'], '<'.$originator.'>') !== false) ||
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$requirement == 'ATTENDEE' &&
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(in_array('e'.$originator, $event['participants']) ||
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// ToDO: Participant could have CN, need to check that too
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$originator_account_id = $GLOBALS['egw']->accounts->name2id($originator, 'account_email') &&
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in_array($originator_account_id, $event['participants'])))
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{
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$matches = true;
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break; // no need to try further as we OR
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}
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}
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if (!$matches)
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{
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throw new Exception("Bad Request: originator-invalid: originator '$originator' invalid for given $component component!", 400);
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}
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}
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$xml = new XMLWriter;
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$xml->openMemory();
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$xml->setIndent(true);
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$xml->startDocument('1.0', 'UTF-8');
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$xml->startElementNs(null, 'schedule-response', self::ISCHEDULE); // null = no prefix
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switch($component)
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{
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case 'VFREEBUSY':
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$this->vfreebusy($event, $handler, $vcal_comp, $xml);
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break;
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case 'VEVENT':
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$this->vevent($event, $handler, $component, $xml);
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break;
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default:
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throw new Exception ('Bad Request: invalid-calendar-data-type: not implemented', 400);
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}
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$xml->endElement(); // schedule-response
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$xml->endDocument();
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header('Content-Type: text/xml; charset=UTF-8');
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header('iSchedule-Version: '.self::VERSION);
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header('iSchedule-Capabilities: '.self::SERIAL);
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echo $xml->outputMemory();
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}
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/**
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* Handle VEVENT component
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*
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* @param array $event
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* @param calendar_ical $handler
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* @param string $component
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* @param XMLWriter $xml
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*/
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function vevent(array $event, calendar_ical $handler, Horde_iCalendar_vevent $component, XMLWriter $xml)
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{
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$organizer = $component->getAttribute('ORGANIZER');
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$attendees = (array)$component->getAttribute('ATTENDEE');
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$handler->importVCal($vCalendar, $eventId,
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self::etag2value($this->http_if_match), false, 0, $this->groupdav->current_user_principal, $user, $charset, $id);
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foreach($event['participants'] as $uid => $status)
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{
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$xml->startElement('response');
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$xml->writeElement('recipient', $attendee=array_shift($attendees)); // iSchedule has not DAV:href!
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if (is_numeric($uid))
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{
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$xml->writeElement('request-status', '2.0;Success');
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$xml->writeElement('responsedescription', 'Delivered to recipient');
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}
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else
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{
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$xml->writeElement('request-status', '3.7;Invalid Calendar User');
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$xml->writeElement('responsedescription', 'Recipient not a local user');
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}
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$xml->endElement(); // response
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}
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}
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/**
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* Handle VFREEBUSY component
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*
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* @param array $event
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* @param calendar_ical $handler
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* @param Horde_iCalendar_vfreebusy $component
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* @param XMLWriter $xml
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*/
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function vfreebusy(array $event, calendar_ical $handler, Horde_iCalendar_vfreebusy $component, XMLWriter $xml)
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{
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$organizer = $component->getAttribute('ORGANIZER');
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$attendees = (array)$component->getAttribute('ATTENDEE');
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foreach($attendees as $attendee)
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{
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$xml->startElement('response');
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$xml->writeElement('recipient', $attendee); // iSchedule has not DAV:href!
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if (stripos($attendee, 'mailto:') === 0 &&
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($uid = $GLOBALS['egw']->accounts->name2id(substr($attendee, 7), 'account_email')))
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{
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$xml->writeElement('request-status', '2.0;Success');
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$xml->writeElement('calendar-data',
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$handler->freebusy($uid, $event['end'], true, 'utf-8', $event['start'], 'REPLY', array(
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'UID' => $event['uid'],
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'ORGANIZER' => $organizer,
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'ATTENDEE' => $attendee,
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)));
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}
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else
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{
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$xml->writeElement('request-status', '3.7;Invalid Calendar User');
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}
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$xml->endElement(); // response
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}
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}
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/**
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* Required DKIM tags
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*
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* @link https://tools.ietf.org/html/rfc6376#section-3.5
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*
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* @var array
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*/
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public static $required_dkim_tags = array('v', 'a', 'b', 'bh', 'd', 'h', 's');
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/**
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* Validate DKIM signature
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*
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* For multivalued and multiple Recipient header(s): PHP engine agregates them ", " separated.
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* ischedule-relaxed canonisation takes care of that.
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*
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* @param array $headers header-name in lowercase(!) as key
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* @param string $body
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* @param string &$error=null error if false returned
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* @return boolean true if signature could be validated, false otherwise
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*/
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public static function dkim_validate(array $headers, $body, &$error=null)
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{
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// parse dkim signature, after unfolding it
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if (!isset($headers['dkim-signature']) ||
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!preg_match_all('/[\t\s]*([a-z]+)\s*=\s*([^;]+);?/i',
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preg_replace("|\r\n\s+|", "", $headers['dkim-signature']), $matches))
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{
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$error = "Can't parse DKIM signature";
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return false;
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}
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$dkim = array_combine($matches[1], $matches[2]);
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// check required DKIM tags
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if (($missing = array_diff(self::$required_dkim_tags, array_keys($dkim))))
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{
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$error = 'missing required DKIM tags: '.implode(', ', $missing);
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return false;
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}
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// check dkim version, have to fail if it's not 1
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if ($dkim['v'] !== '1')
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{
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$error = "Wrong DKIM version '$dkim[v]'";
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return false;
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}
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// create headers array, h tag can contain whitespace, which need to be removed
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$dkim_headers = array();
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$check = $headers;
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foreach(explode(':', strtolower(preg_replace("|\s|", "", $dkim['h']))) as $header)
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{
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// dkim oversigning: ommit not existing headers in signing
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if (!isset($check[$header])) continue;
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$value = $check[$header];
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unset($check[$header]);
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$dkim_headers[] = $header.': '.$value;
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}
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// dkim signature is obvious without content of signature, but must not necessarly be last tag
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$dkim_unsigned = 'DKIM-Signature: '.str_replace($dkim['b'], '', $headers['dkim-signature']);
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// c defaults to 'simple/simple', check on valid canonicalization methods is performed further down
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list($header_canon, $body_canon) = explode('/', isset($dkim['c']) ? $dkim['c'] : 'simple/simple');
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// Canonicalization for Body
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switch($body_canon)
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{
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case 'relaxed':
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$_b = mailDomainSigner::bodyRelaxCanon($body);
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break;
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case 'simple':
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$_b = mailDomainSigner::bodySimpleCanon($body);
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break;
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default:
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$error = "Unknown body canonicalization '$body_canon'";
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return false;
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}
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// check signing and hashing algorithms
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list($sign_algo, $hash_algo) = explode('-', $dkim['a']);
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if ($sign_algo != 'rsa' || !in_array($hash_algo, array('sha1', 'sha256', 'sha384', 'sha512')))
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{
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$error = "Unknown or unimplemented algorithm a='$dkim[a]'";
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return false;
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}
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// Hash of the canonicalized body [tag:bh]
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$_bh = base64_encode(hash($hash_algo, $_b, true));
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// check body hash, need to remove optional whitespace
|
|
if ($_bh != preg_replace("|\s|", "", $dkim['bh']))
|
|
{
|
|
$error = 'Body hash does NOT verify';
|
|
error_log(__METHOD__."() body-hash='$_bh' != '$dkim[bh]'=dkim-bh $error");
|
|
return false;
|
|
}
|
|
|
|
// Canonicalization Header Data
|
|
switch($header_canon)
|
|
{
|
|
case 'relaxed':
|
|
$_unsigned = mailDomainSigner::headRelaxCanon(implode("\r\n", $dkim_headers). "\r\n".$dkim_unsigned);
|
|
break;
|
|
|
|
case 'ischedule-relaxed':
|
|
$_unsigned = mailDomainSigner::headIScheduleRelaxCanon(implode("\r\n", $dkim_headers). "\r\n".$dkim_unsigned);
|
|
break;
|
|
|
|
case 'simple':
|
|
$_unsigned = mailDomainSigner::headSimpleCanon(implode("\r\n", $dkim_headers). "\r\n".$dkim_unsigned);
|
|
break;
|
|
|
|
default:
|
|
$error = "Unknown header canonicalization '$header_canon'";
|
|
return false;
|
|
}
|
|
|
|
// fetch public key using method in dkim q
|
|
foreach(explode(':', $dkim['q']) as $method)
|
|
{
|
|
switch($method)
|
|
{
|
|
case 'dns/txt':
|
|
$public_key = self::dns_txt_pubkey($dkim['d'], $dkim['s']);
|
|
break;
|
|
|
|
case 'http/well-known':
|
|
$public_key = self::well_known_pubkey($dkim['d'], $dkim['s']);
|
|
break;
|
|
|
|
case 'private-exchange':
|
|
$public_key = self::private_exchange_pubkey($dkim['d'], $dkim['s']);
|
|
break;
|
|
|
|
default: // not understood q method
|
|
$public_key = false;
|
|
break;
|
|
}
|
|
if ($public_key) break;
|
|
}
|
|
// for testing purpose allways try private-exchange, if none other match
|
|
if (!$public_key) $public_key = self::private_exchange_pubkey($dkim['d'], $dkim['s']);
|
|
|
|
if (!$public_key)
|
|
{
|
|
$error = "No public key for d='$dkim[d]' and s='$dkim[s]' using methods q='$dkim[q]'";
|
|
return false;
|
|
}
|
|
// value of b tag can contain whitespace, which need to be removed
|
|
$ok = openssl_verify($_unsigned, base64_decode(preg_replace("|\s|", "", $dkim['b'])), $public_key, $hash_algo);
|
|
if ($ok != 1) error_log(__METHOD__."() openssl_verify('$_unsigned', ..., '$public_key', '$hash_algo') returned ".array2string($ok));
|
|
|
|
switch($ok)
|
|
{
|
|
case -1:
|
|
$error = 'Error while verifying DKIM';
|
|
return false;
|
|
|
|
case 0:
|
|
$error = 'DKIM signature does NOT verify';
|
|
return false;
|
|
}
|
|
|
|
// verify optional x tag, unix timestamp when signature expires
|
|
if (isset($dkim['x']) && (!is_numeric($dkim['x']) || $dkim['x'] < time()))
|
|
{
|
|
$error = "DKIM signature is expired x=$dkim[x] < ".time();
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Provisional private-exchange public keys
|
|
*
|
|
* @var array domain => selector => public key
|
|
*/
|
|
static $private_exchange = array(
|
|
'example.com' => array(
|
|
'ischedule' => '-----BEGIN PUBLIC KEY-----
|
|
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDtocSHvSS1Nn0uIL4Sg+0wp6Kc
|
|
W31WRC4Fww8P+jvsVAazVOxvxkShNSd18EvApiNa55P8WgKVEu02OQePjnjKNqfg
|
|
JPeajkWy/0CJn+d6rX/ncPMGX2EYzqXy/CyVqpcnVAosToymo6VHL6ufhzlyLJFD
|
|
znLtV121CZLUZlAySQIDAQAB
|
|
-----END PUBLIC KEY-----',
|
|
),
|
|
'mysite.edu' => array(
|
|
'selector' => '-----BEGIN PUBLIC KEY-----
|
|
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuv+6UtGUdPerJ3s0HCng2sv3c
|
|
R3ttma0JB6rMFfOTi1oHgk+h328MfGzhZK+SA9tsRPBcrJE/3uxs4SS2XNG9qRCG
|
|
0YMmNFOmubht4RhQhS9drSNyMZbhy2MPVbl9lHAJULFdaDdLj1hc3xTMWy8sDa8s
|
|
M8r0gHvp/sPSe9CQQQIDAQAB
|
|
-----END PUBLIC KEY-----',
|
|
),
|
|
'ken.name' => array(
|
|
'ischedule' => '-----BEGIN PUBLIC KEY-----
|
|
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCfAWRKjVWS/W4F3nUYnj4XWYsy
|
|
+DsJdTjMKiHilUgQoz5MLnWpE/rt0LZklMG4Vz0io82pvnUzRrhmiaTTynlEwkj7
|
|
gDABr/WCxv2j5vKNayz13my8z+D6efYkuHsPP8z5iQp9yzbKa8FXKb+O7AXbK5fS
|
|
3U7S1OJgMpBeCrcpdwIDAQAB
|
|
-----END PUBLIC KEY-----',
|
|
),
|
|
'caldav.egroupware.net' => array(
|
|
'calendar' => '-----BEGIN PUBLIC KEY-----
|
|
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCiawhLuTSVhnl1zz5pXs1A748y
|
|
N3aNE181dni8nsYqIQB1h4H32J4dZurEiAnP9nflQRjCmmg1NTvFcNz11Bem4zo1
|
|
K4r4mcfbjlheorK2Mwoh445HR3fo/pP7uV6CcXTNboBJLTxs6ZHswmQjxyuKBKmx
|
|
yXUKsIQVi3qPyPdB3QIDAQAB
|
|
-----END PUBLIC KEY-----',
|
|
),
|
|
'outdoor-training.de' => array(
|
|
'calendar' => '-----BEGIN PUBLIC KEY-----
|
|
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCiawhLuTSVhnl1zz5pXs1A748y
|
|
N3aNE181dni8nsYqIQB1h4H32J4dZurEiAnP9nflQRjCmmg1NTvFcNz11Bem4zo1
|
|
K4r4mcfbjlheorK2Mwoh445HR3fo/pP7uV6CcXTNboBJLTxs6ZHswmQjxyuKBKmx
|
|
yXUKsIQVi3qPyPdB3QIDAQAB
|
|
-----END PUBLIC KEY-----',
|
|
),
|
|
);
|
|
|
|
/**
|
|
* Fetch public key from dns txt recored dkim q=private-exchange
|
|
*
|
|
* @param string $d domain
|
|
* @param string $s selector
|
|
* @return string|boolean string with (full) public key or false if not found or other error retrieving it
|
|
*/
|
|
public static function private_exchange_pubkey($d, $s)
|
|
{
|
|
if (!isset(self::$private_exchange[$d]) || !isset(self::$private_exchange[$d][$s]))
|
|
{
|
|
return false;
|
|
}
|
|
return self::$private_exchange[$d][$s];
|
|
}
|
|
|
|
/**
|
|
* Fetch public key via http for q=http/well-known
|
|
*
|
|
* GET request to https://$domain/.well-known/domainkey/$selector
|
|
* Content should be identical to txt record for dns/txt.
|
|
*
|
|
* @param string $d domain
|
|
* @param string $s selector
|
|
* @return string|boolean string with (full) public key or false if not found or other error retrieving it
|
|
*/
|
|
public static function well_known_pubkey($d, $s)
|
|
{
|
|
if (!($keys = @file_get_contents('https://'.$d.'/.well-known/domainkey/'.$s)) ||
|
|
preg_match('/p=([^;]+)/i', $keys, $matches))
|
|
{
|
|
return false;
|
|
}
|
|
return "-----BEGIN PUBLIC KEY-----\n".chunk_split($matches[1], 64, "\n")."-----END PUBLIC KEY-----\n";
|
|
}
|
|
|
|
/**
|
|
* Fetch public key from dns txt recored dkim q=dns/txt
|
|
*
|
|
* @param string $d domain
|
|
* @param string $s selector
|
|
* @return string|boolean string with (full) public key or false if not found or other error retrieving it
|
|
*/
|
|
public function dns_txt_pubkey($d, $s)
|
|
{
|
|
if (!($dns = self::fetch_dns($d, $s)))
|
|
{
|
|
return false;
|
|
}
|
|
return "-----BEGIN PUBLIC KEY-----\n".chunk_split($dns['p'], 64, "\n")."-----END PUBLIC KEY-----\n";
|
|
}
|
|
|
|
/**
|
|
* Fetch dns record and return parsed array
|
|
*
|
|
* @param string $domain
|
|
* @param string $selector
|
|
* @return array with values for keys parsed from eg. "v=DKIM1\;k=rsa\;h=sha1\;s=calendar\;t=s\;p=..."
|
|
*/
|
|
public static function fetch_dns($domain, $selector='calendar')
|
|
{
|
|
if (!($records = dns_get_record($host=$selector.'._domainkey.'.$domain, DNS_TXT))) return false;
|
|
|
|
if (!isset($records[0]['text']) &&
|
|
!preg_match_all('/[\t\s]*([a-z]+)=([^;]+);?/i', $records[0]['txt'], $matches))
|
|
{
|
|
return false;
|
|
}
|
|
return array_combine($matches[1], $matches[2]);
|
|
}
|
|
|
|
const SERIAL = '124';
|
|
|
|
/**
|
|
* Serve an iSchedule GET request, currently only action=capabilities
|
|
*
|
|
* GET /.well-known/ischedule?action=capabilities HTTP/1.1
|
|
* Host: cal.example.com
|
|
*
|
|
* HTTP/1.1 200 OK
|
|
* Date: Mon, 15 Dec 2008 09:32:12 GMT
|
|
* Content-Type: application/xml; charset=utf-8
|
|
* Content-Length: xxxx
|
|
* iSchedule-Version: 1.0
|
|
* iSchedule-Capabilities: 123
|
|
* ETag: "afasdf-132afds"
|
|
*
|
|
* <?xml version="1.0" encoding="utf-8" ?>
|
|
* <query-result xmlns="urn:ietf:params:xml:ns:ischedule">
|
|
* <capabilities>
|
|
* <serial-number>123</serial-number>
|
|
* <versions>
|
|
* <version>1.0</version>
|
|
* </versions>
|
|
* <scheduling-messages>
|
|
* <component name="VEVENT">
|
|
* <method name="REQUEST"/>
|
|
* <method name="ADD"/>
|
|
* <method name="REPLY"/>
|
|
* <method name="CANCEL"/>
|
|
* </component>
|
|
* <component name="VTODO"/>
|
|
* <component name="VFREEBUSY"/>
|
|
* </scheduling-messages>
|
|
* <calendar-data-types>
|
|
* <calendar-data-type content-type="text/calendar" version="2.0"/>
|
|
* </calendar-data-types>
|
|
* <attachmens>
|
|
* <inline/>
|
|
* <external/>
|
|
* </attachments>
|
|
* <max-content-length>102400</max-content-length>
|
|
* <min-date-time>19910101T000000Z</min-date-time>
|
|
* <max-date-time>20381231T000000Z</max-date-time>
|
|
* <max-instances>150</max-instances>
|
|
* <max-recipients>250</max-recipients>
|
|
* <administrator>mailto:ischedule-admin@example.com</administrator>
|
|
* </capabilities>
|
|
* </query-result>
|
|
*/
|
|
public function get()
|
|
{
|
|
if (!isset($_GET['action']) || $_GET['action'] !== 'capabilities')
|
|
{
|
|
error_log(__METHOD__."() invalid iSchedule request using GET without action=capabilities!");
|
|
header("HTTP/1.1 400 Bad Request");
|
|
echo "<h1>Invalid iSchedule request using GET without action=capabilities!</h1>\n";
|
|
return;
|
|
}
|
|
|
|
// generate capabilities
|
|
$xml = new XMLWriter;
|
|
$xml->openMemory();
|
|
$xml->setIndent(true);
|
|
$xml->startDocument('1.0', 'UTF-8');
|
|
$xml->startElementNs(null, 'query-result', self::ISCHEDULE);
|
|
$xml->startElement('capabilities');
|
|
|
|
$xml->writeElement('serial-number', self::SERIAL);
|
|
|
|
$xml->startElement('versions');
|
|
foreach(self::$supported_versions as $version)
|
|
{
|
|
$xml->writeElement('version', $version);
|
|
}
|
|
$xml->endElement(); // versions
|
|
|
|
$xml->startElement('scheduling-messages');
|
|
foreach(self::$supported_components as $component => $methods)
|
|
{
|
|
$xml->startElement('component');
|
|
$xml->writeAttribute('name', $component);
|
|
foreach($methods as $method)
|
|
{
|
|
$xml->startElement('method');
|
|
$xml->writeAttribute('name', $method);
|
|
$xml->endElement(); // method
|
|
}
|
|
$xml->endElement(); // component
|
|
}
|
|
$xml->endElement(); // scheduling-messages
|
|
|
|
$xml->startElement('calendar-data-types');
|
|
foreach(self::$supported_calendar_data_types as $data)
|
|
{
|
|
$xml->startElement('calendar-data-type');
|
|
foreach($data as $name => $value)
|
|
{
|
|
$xml->writeAttribute($name, $value);
|
|
}
|
|
$xml->endElement(); // calendar-data-type
|
|
}
|
|
$xml->endElement(); // calendar-data-types
|
|
|
|
$xml->startElement('attachments');
|
|
foreach(self::$supported_attachments as $type)
|
|
{
|
|
$xml->writeElement($type, '');
|
|
}
|
|
$xml->endElement(); // attachments
|
|
|
|
if (!empty($GLOBALS['egw_info']['server']['admin_mails']))
|
|
{
|
|
self::$capablities['administrator'] = 'mailto:'.$GLOBALS['egw_info']['server']['admin_mails'];
|
|
}
|
|
foreach(self::$capablities as $name => $value)
|
|
{
|
|
$xml->writeElement($name, $value);
|
|
}
|
|
|
|
$xml->endElement(); // capabilities
|
|
$xml->endElement(); // query-result
|
|
$xml->endDocument();
|
|
$capabilities = $xml->outputMemory();
|
|
|
|
// returning capabilities
|
|
header('Content-Type: application/xml; charset=utf-8');
|
|
header('iSchedule-Version: '.self::VERSION);
|
|
header('iSchedule-Capabilities: '.self::SERIAL);
|
|
header('Content-Length: '.bytes($capabilites));
|
|
header('ETag: "'.md5($capabilites).'"');
|
|
|
|
echo $capabilities;
|
|
common::egw_exit();
|
|
}
|
|
|
|
/**
|
|
* Exception handler, which additionally logs the request (incl. a trace)
|
|
*
|
|
* Does NOT return and get installed in constructor.
|
|
*
|
|
* @param Exception $e
|
|
*/
|
|
public static function exception_handler(Exception $e)
|
|
{
|
|
// logging exception as regular egw_execption_hander does
|
|
_egw_log_exception($e,$headline);
|
|
|
|
// exception handler sending message back to the client as http status
|
|
$code = $e->getCode();
|
|
$msg = $e->getMessage();
|
|
list($http_status, $error, $description) = explode(': ', $msg, 3);
|
|
// check if we have a valid iSchedule error element, if not we use invalid-scheduling-message
|
|
if (!empty($error) && strpos($error, ' ') !== false)
|
|
{
|
|
$description = $error.($description ? ': '.$description : '');
|
|
$error = 'invalid-scheduling-message';
|
|
}
|
|
if (!in_array($code, array(400, 403, 407, 503))) $code = 500;
|
|
|
|
header('HTTP/1.1 '.$code.' '.$http_status, true, $code);
|
|
header('Content-Type: text/xml; charset=UTF-8');
|
|
header('iSchedule-Version: '.self::VERSION);
|
|
header('iSchedule-Capabilities: '.self::SERIAL);
|
|
|
|
if ($error)
|
|
{
|
|
echo '<?xml version="1.0" encoding="utf-8" ?>
|
|
<error xmlns="urn:ietf:params:xml:ns:ischedule">
|
|
<'.$error.' />
|
|
<response-description>'.htmlspecialchars($description).'</response-description>
|
|
</error>
|
|
';
|
|
}
|
|
|
|
// if our groupdav logging is active, log the request plus a trace, if enabled in server-config
|
|
if (groupdav::$request_starttime && isset(self::$instance))
|
|
{
|
|
self::$instance->_http_status = $code.' '.$http_status;
|
|
if ($GLOBALS['egw_info']['server']['exception_show_trace'])
|
|
{
|
|
self::$instance->log_request("\n".$e->getTraceAsString()."\n");
|
|
}
|
|
else
|
|
{
|
|
self::$instance->log_request();
|
|
}
|
|
}
|
|
if (is_object($GLOBALS['egw']))
|
|
{
|
|
common::egw_exit();
|
|
}
|
|
exit;
|
|
}
|
|
}
|