forked from extern/egroupware
770 lines
24 KiB
PHP
770 lines
24 KiB
PHP
<?php
|
|
/**
|
|
* EGroupware: iSchedule server
|
|
*
|
|
* @link http://www.egroupware.org
|
|
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
|
* @package api
|
|
* @subpackage groupdav
|
|
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @copyright (c) 2012-13 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @version $Id$
|
|
*/
|
|
|
|
/**
|
|
* iSchedule server: serverside of iSchedule
|
|
*
|
|
* @link https://tools.ietf.org/html/draft-desruisseaux-ischedule-03 iSchedule draft from 2013-01-22
|
|
*
|
|
* groupdav get's extended here to get it's logging, should separate that out ...
|
|
*/
|
|
class ischedule_server extends groupdav
|
|
{
|
|
/**
|
|
* iSchedule xml namespace
|
|
*/
|
|
const ISCHEDULE = 'urn:ietf:params:xml:ns:ischedule';
|
|
|
|
/**
|
|
* Own iSchedule version
|
|
*/
|
|
const VERSION = '1.0';
|
|
|
|
/**
|
|
* Required headers in DKIM signature (DKIM-Signature is always a required header!)
|
|
*/
|
|
const REQUIRED_DKIM_HEADERS = 'iSchedule-Version:Content-Type:Originator:Recipient';
|
|
//const REQUIRED_DKIM_HEADERS = 'iSchedule-Version:iSchedule-Message-ID:Content-Type:Originator:Recipient';
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
public function __construct()
|
|
{
|
|
// install our own exception handler sending exceptions as http status
|
|
set_exception_handler(array(__CLASS__, 'exception_handler'));
|
|
|
|
self::$instance = $this;
|
|
}
|
|
|
|
/**
|
|
* Serve an iSchedule request
|
|
*/
|
|
public function ServeRequest()
|
|
{
|
|
self::$log_level = $GLOBALS['egw_info']['user']['preferences']['groupdav']['debug_level'];
|
|
self::$log_level = 'f';
|
|
if (self::$log_level === 'r' || self::$log_level === 'f' || $this->debug)
|
|
{
|
|
self::$request_starttime = microtime(true);
|
|
$this->store_request = true;
|
|
ob_start();
|
|
}
|
|
// get raw request body
|
|
$this->request = file_get_contents('php://input');
|
|
|
|
|
|
switch($_SERVER['REQUEST_METHOD'])
|
|
{
|
|
case 'GET':
|
|
$this->get();
|
|
break;
|
|
|
|
case 'POST':
|
|
$this->post();
|
|
break;
|
|
|
|
default:
|
|
error_log(__METHOD__."() invalid iSchedule request using {$_SERVER['REQUEST_METHOD']}!");
|
|
header("HTTP/1.1 400 Bad Request");
|
|
}
|
|
|
|
if (self::$request_starttime) self::log_request();
|
|
}
|
|
|
|
static $supported_components = array('VEVENT', 'VFREEBUSY', 'VTODO');
|
|
/**
|
|
* Requiremnt for originator to match depending on method
|
|
*
|
|
* @var array method => array('ORGANIZER','ATTENDEE')
|
|
* @link https://tools.ietf.org/html/draft-desruisseaux-ischedule-01#section-6.1
|
|
*/
|
|
static $supported_method2origin_requirement = array(
|
|
//'PUBLISH' => null, // no requirement
|
|
'REQUEST' => array('ORGANIZER', 'ATTENDEE'),
|
|
'REPLY' => array('ATTENDEE'),
|
|
'ADD' => array('ORGANIZER'),
|
|
'CANCEL' => array('ORGANIZER'),
|
|
//'REFRESH' => null,
|
|
//'COUNTER' => array('ATTENDEE'),
|
|
//'DECLINECOUNTER' => array('ORGANIZER'),
|
|
);
|
|
|
|
/**
|
|
* Serve an iSchedule POST request
|
|
*/
|
|
public function post()
|
|
{
|
|
// get and verify required headers
|
|
$headers = array();
|
|
foreach($_SERVER as $name => $value)
|
|
{
|
|
$name = strtolower(str_replace('_', '-', $name));
|
|
list($first, $rest) = explode('-', $name, 2);
|
|
switch($first)
|
|
{
|
|
case 'content':
|
|
$headers[$name] = $value;
|
|
break;
|
|
case 'http':
|
|
$headers[$rest] = $value;
|
|
break;
|
|
}
|
|
}
|
|
if (($missing = array_diff(explode(':', strtolower(self::REQUIRED_DKIM_HEADERS.':DKIM-Signature')), array_keys($headers))))
|
|
{
|
|
//error_log('headers='.array2string(array_keys($headers)).', required='.self::REQUIRED_DKIM_HEADERS.', missing='.array($missing));
|
|
throw new Exception ('Bad Request: missing required headers: '.implode(', ', $missing), 400);
|
|
}
|
|
|
|
// validate dkim signature
|
|
// for multivalued Recipient header: as PHP engine agregates them ", " separated,
|
|
// we cant tell it apart from ", " separated recipients in one header, therefore we try to validate both.
|
|
// It will fail if multiple recipients in a single header are also ", " separated (just comma works fine)
|
|
if (!self::dkim_validate($headers, $this->request, $error))
|
|
{
|
|
throw new Exception('Bad Request: DKIM signature invalid: '.$error, 400);
|
|
}
|
|
// check if recipient is a user
|
|
// ToDo: multiple recipients
|
|
if (!($account_id = $GLOBALS['egw']->accounts->name2id($headers['recipient'], 'account_email')))
|
|
{
|
|
throw new Exception('Bad Request: unknown recipient', 400);
|
|
}
|
|
// create enviroment for recipient user, as we act on his behalf
|
|
$GLOBALS['egw']->session->account_id = $account_id;
|
|
$GLOBALS['egw']->session->account_lid = $GLOBALS['egw']->accounts->id2name($account_id);
|
|
//$GLOBALS['egw']->session->account_domain = $domain;
|
|
$GLOBALS['egw_info']['user'] = $GLOBALS['egw']->session->read_repositories();
|
|
translation::init();
|
|
|
|
// check originator is allowed to iSchedule with recipient
|
|
// ToDo: preference for user/admin to specify with whom to iSchedule: $allowed_origins
|
|
$allowed_origins = preg_split('/, ?/', $GLOBALS['egw_info']['user']['groupdav']['ischedule_allowed_origins']);
|
|
/* disabled 'til UI is ready to specifiy
|
|
list(,$originator_domain) = explode('@', $headers['Originator']);
|
|
if (!in_array($headers['Originator'], $allowed_orgins) && !in_array($originator_domain, $allowed_origins))
|
|
{
|
|
throw new Exception('Forbidden', 403);
|
|
}*/
|
|
|
|
// check method and component of Content-Type are valid
|
|
if (!preg_match('/component=([^;]+)/i', $headers['content-type'], $matches) ||
|
|
(!in_array($component=strtoupper($matches[1]), self::$supported_components)))
|
|
{
|
|
throw new Exception ('Bad Request: missing or unsupported component in Content-Type header', 400);
|
|
}
|
|
if (!preg_match('/method=([^;]+)/i', $headers['content-type'], $matches) ||
|
|
(!isset(self::$supported_method2origin_requirement[$method=strtoupper($matches[1])])) ||
|
|
$component == 'VFREEBUSY' && $method != 'REQUEST')
|
|
{
|
|
throw new Exception ('Bad Request: missing or unsupported method in Content-Type header', 400);
|
|
}
|
|
// parse iCal
|
|
// code copied from calendar_groupdav::outbox_freebusy_request for now
|
|
include_once EGW_SERVER_ROOT.'/phpgwapi/inc/horde/lib/core.php';
|
|
$vcal = new Horde_iCalendar();
|
|
if (!$vcal->parsevCalendar($this->request, 'VCALENDAR', 'utf-8'))
|
|
{
|
|
throw new Exception('Bad Request: Failed parsing iCal', 400);
|
|
}
|
|
$version = $vcal->getAttribute('VERSION');
|
|
$handler = new calendar_ical();
|
|
$handler->setSupportedFields('GroupDAV',$this->agent);
|
|
$handler->calendarOwner = $handler->user = 0; // to NOT default owner/organizer to something
|
|
if (!($vcal_comp = $vcal->getComponent(0)) ||
|
|
!($event = $handler->vevent2egw($vcal_comp, $version, $handler->supportedFields,
|
|
$principalURL='', $check_component='Horde_iCalendar_'.strtolower($component))))
|
|
{
|
|
throw new Exception('Bad Request: Failed converting iCal', 400);
|
|
}
|
|
|
|
// validate originator matches organizer or attendee
|
|
$originator_requirement = self::$supported_method2origin_requirement[$method];
|
|
if (isset($originator_requirement))
|
|
{
|
|
$matches = false;
|
|
foreach($originator_requirement as $requirement)
|
|
{
|
|
if ($requirement == 'ORGANIZER' &&
|
|
($event['organizer'] == $headers['originator'] || strpos($event['organizer'], '<'.$headers['originator'].'>') !== false) ||
|
|
$requirement == 'ATTENDEE' &&
|
|
(in_array('e'.$headers['originator'], $event['participants']) ||
|
|
// ToDO: Participant could have CN, need to check that too
|
|
$originator_account_id = $GLOBALS['egw']->accounts->name2id($headers['originator'], 'account_email') &&
|
|
in_array($originator_account_id, $event['participants'])))
|
|
{
|
|
$matches = true;
|
|
break; // no need to try further as we OR
|
|
}
|
|
}
|
|
if (!$matches)
|
|
{
|
|
throw new Exception('Bad Request: originator invalid for given '.$component.'!', 400);
|
|
}
|
|
}
|
|
|
|
$xml = new XMLWriter;
|
|
$xml->openMemory();
|
|
$xml->setIndent(true);
|
|
$xml->startDocument('1.0', 'UTF-8');
|
|
$xml->startElementNs(null, 'schedule-response', self::ISCHEDULE); // null = no prefix
|
|
|
|
switch($component)
|
|
{
|
|
case 'VFREEBUSY':
|
|
$this->vfreebusy($event, $handler, $vcal_comp, $xml);
|
|
break;
|
|
|
|
case 'VEVENT':
|
|
$this->vevent($event, $handler, $component, $xml);
|
|
break;
|
|
|
|
default:
|
|
throw new exception('Not yet implemented!');
|
|
}
|
|
|
|
$xml->endElement(); // schedule-response
|
|
$xml->endDocument();
|
|
|
|
header('Content-Type: text/xml; charset=UTF-8');
|
|
header('iSchedule-Version: '.self::VERSION);
|
|
|
|
echo $xml->outputMemory();
|
|
}
|
|
|
|
/**
|
|
* Handle VEVENT component
|
|
*
|
|
* @param array $event
|
|
* @param calendar_ical $handler
|
|
* @param string $component
|
|
* @param XMLWriter $xml
|
|
*/
|
|
function vevent(array $event, calendar_ical $handler, Horde_iCalendar_vevent $component, XMLWriter $xml)
|
|
{
|
|
$organizer = $component->getAttribute('ORGANIZER');
|
|
$attendees = (array)$component->getAttribute('ATTENDEE');
|
|
|
|
$handler->importVCal($vCalendar, $eventId,
|
|
self::etag2value($this->http_if_match), false, 0, $this->groupdav->current_user_principal, $user, $charset, $id);
|
|
|
|
foreach($event['participants'] as $uid => $status)
|
|
{
|
|
$xml->startElement('response');
|
|
|
|
$xml->writeElement('recipient', $attendee=array_shift($attendees)); // iSchedule has not DAV:href!
|
|
|
|
if (is_numeric($uid))
|
|
{
|
|
$xml->writeElement('request-status', '2.0;Success');
|
|
$xml->writeElement('responsedescription', 'Delivered to recipient');
|
|
}
|
|
else
|
|
{
|
|
$xml->writeElement('request-status', '3.7;Invalid Calendar User');
|
|
$xml->writeElement('responsedescription', 'Recipient not a local user');
|
|
}
|
|
$xml->endElement(); // response
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handle VFREEBUSY component
|
|
*
|
|
* @param array $event
|
|
* @param calendar_ical $handler
|
|
* @param Horde_iCalendar_vfreebusy $component
|
|
* @param XMLWriter $xml
|
|
*/
|
|
function vfreebusy(array $event, calendar_ical $handler, Horde_iCalendar_vfreebusy $component, XMLWriter $xml)
|
|
{
|
|
$organizer = $component->getAttribute('ORGANIZER');
|
|
$attendees = (array)$component->getAttribute('ATTENDEE');
|
|
|
|
foreach($event['participants'] as $uid => $status)
|
|
{
|
|
$xml->startElement('response');
|
|
|
|
$xml->writeElement('recipient', $attendee=array_shift($attendees)); // iSchedule has not DAV:href!
|
|
|
|
if (is_numeric($uid))
|
|
{
|
|
$xml->writeElement('request-status', '2.0;Success');
|
|
$xml->writeElement('calendar-data',
|
|
$handler->freebusy($uid, $event['end'], true, 'utf-8', $event['start'], 'REPLY', array(
|
|
'UID' => $event['uid'],
|
|
'ORGANIZER' => $organizer,
|
|
'ATTENDEE' => $attendee,
|
|
)));
|
|
}
|
|
else
|
|
{
|
|
$xml->writeElement('request-status', '3.7;Invalid Calendar User');
|
|
}
|
|
$xml->endElement(); // response
|
|
}
|
|
}
|
|
/**
|
|
* Required DKIM tags
|
|
*
|
|
* @link https://tools.ietf.org/html/rfc6376#section-3.5
|
|
*
|
|
* @var array
|
|
*/
|
|
public static $required_dkim_tags = array('v', 'a', 'b', 'bh', 'd', 'h', 's');
|
|
|
|
/**
|
|
* Validate DKIM signature
|
|
*
|
|
* For multivalued Recipient header(s): as PHP engine agregates them ", " separated,
|
|
* we can not tell these apart from ", " separated recipients in one header!
|
|
*
|
|
* Therefore we can only try to validate both situations.
|
|
*
|
|
* It will fail if multiple recipients in a single header are also ", " separated (just comma works fine).
|
|
*
|
|
* @param array $headers header-name in lowercase(!) as key
|
|
* @param string $body
|
|
* @param string &$error=null error if false returned
|
|
* @param boolean $split_recipients=null true=split recpients in multiple headers, false dont, default null try both
|
|
* @return boolean true if signature could be validated, false otherwise
|
|
* @todo other dkim q= methods: http/well-known bzw private-exchange
|
|
*/
|
|
public static function dkim_validate(array $headers, $body, &$error=null, $split_recipients=null)
|
|
{
|
|
// parse dkim signature
|
|
if (!isset($headers['dkim-signature']) ||
|
|
!preg_match_all('/[\t\s]*([a-z]+)=([^;]+);?/i', $headers['dkim-signature'], $matches))
|
|
{
|
|
$error = "Can't parse DKIM signature";
|
|
return false;
|
|
}
|
|
$dkim = array_combine($matches[1], $matches[2]);
|
|
|
|
// check required DKIM tags
|
|
if (($missing = array_diff(self::$required_dkim_tags, array_keys($dkim))))
|
|
{
|
|
$error = 'missing required DKIM tags: '.implode(', ', $missing);
|
|
return false;
|
|
}
|
|
|
|
// check dkim version, have to fail if it's not 1
|
|
if ($dkim['v'] !== '1')
|
|
{
|
|
$error = "Wrong DKIM version '$dkim[v]'";
|
|
return false;
|
|
}
|
|
|
|
// create headers array
|
|
$dkim_headers = array();
|
|
$check = $headers;
|
|
foreach(explode(':', strtolower($dkim['h'])) as $header)
|
|
{
|
|
// dkim oversigning: ommit not existing headers in signing
|
|
if (!isset($check[$header])) continue;
|
|
|
|
$value = $check[$header];
|
|
unset($check[$header]);
|
|
|
|
// special handling of multivalued recipient header
|
|
if ($header == 'recipient' && (!isset($split_recipients) || $split_recipients))
|
|
{
|
|
if (!is_array($value)) $value = explode(', ', $value);
|
|
$v = array_pop($value); // dkim uses reverse order!
|
|
if ($value) $check[$header] = $value;
|
|
$value = $v;
|
|
}
|
|
$dkim_headers[] = $header.': '.$value;
|
|
}
|
|
// dkim signature is obvious without content of signature, but must not necessarly be last tag
|
|
$dkim_unsigned = 'DKIM-Signature: '.str_replace($dkim['b'], '', $headers['dkim-signature']);
|
|
|
|
// c defaults to 'simple/simple', check on valid canonicalization methods is performed further down
|
|
list($header_canon, $body_canon) = explode('/', isset($dkim['c']) ? $dkim['c'] : 'simple/simple');
|
|
require_once EGW_API_INC.'/php-mail-domain-signer/lib/class.mailDomainSigner.php';
|
|
|
|
// Canonicalization for Body
|
|
switch($body_canon)
|
|
{
|
|
case 'relaxed':
|
|
$_b = mailDomainSigner::bodyRelaxCanon($body);
|
|
break;
|
|
|
|
case 'simple':
|
|
$_b = mailDomainSigner::bodySimpleCanon($body);
|
|
break;
|
|
|
|
default:
|
|
$error = "Unknown body canonicalization '$body_canon'";
|
|
return false;
|
|
}
|
|
|
|
// check signing and hashing algorithms
|
|
list($sign_algo, $hash_algo) = explode('-', $dkim['a']);
|
|
if ($sign_algo != 'rsa' || !in_array($hash_algo, array('sha1', 'sha256', 'sha384', 'sha512')))
|
|
{
|
|
$error = "Unknown or unimplemented algorithm a='$dkim[a]'";
|
|
return false;
|
|
}
|
|
|
|
// Hash of the canonicalized body [tag:bh]
|
|
$_bh = base64_encode(hash($hash_algo, $_b, true));
|
|
|
|
// check body hash
|
|
if ($_bh != $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 '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;
|
|
}
|
|
$ok = openssl_verify($_unsigned, base64_decode($dkim['b']), $public_key, $hash_algo);
|
|
error_log(__METHOD__."() openssl_verify('$_unsigned', ..., '$public_key', '$hash_algo') returned ".array2string($ok));
|
|
|
|
switch($ok)
|
|
{
|
|
case -1:
|
|
$error = 'Error while verifying DKIM';
|
|
return false;
|
|
|
|
case 0:
|
|
$error = 'DKIM signature does NOT verify';
|
|
// if dkim did not validate, try not splitting Recipient header
|
|
if (!isset($split_recipients))
|
|
{
|
|
return self::dkim_validate($headers, $body, $error, false);
|
|
}
|
|
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-----',
|
|
),
|
|
'caldav.egroupware.net' => 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], $matches[2]);
|
|
}
|
|
|
|
const SERIAL = '123';
|
|
|
|
/**
|
|
* Serve an iSchedule GET request, currently only action=capabilities
|
|
*
|
|
* GET /.well-known/ischedule?action=capabilities HTTP/1.1
|
|
* Host: cal.example.com
|
|
*
|
|
* HTTP/1.1 200 OK
|
|
* Date: Mon, 15 Dec 2008 09:32:12 GMT
|
|
* Content-Type: application/xml; charset=utf-8
|
|
* Content-Length: xxxx
|
|
* iSchedule-Version: 1.0
|
|
* iSchedule-Capabilities: 123
|
|
* ETag: "afasdf-132afds"
|
|
*
|
|
* <?xml version="1.0" encoding="utf-8" ?>
|
|
* <query-result xmlns="urn:ietf:params:xml:ns:ischedule">
|
|
* <capabilities>
|
|
* <serial-number>123</serial-number>
|
|
* <versions>
|
|
* <version>1.0</version>
|
|
* </versions>
|
|
* <scheduling-messages>
|
|
* <component name="VEVENT">
|
|
* <method name="REQUEST"/>
|
|
* <method name="ADD"/>
|
|
* <method name="REPLY"/>
|
|
* <method name="CANCEL"/>
|
|
* </component>
|
|
* <component name="VTODO"/>
|
|
* <component name="VFREEBUSY"/>
|
|
* </scheduling-messages>
|
|
* <calendar-data-types>
|
|
* <calendar-data-type content-type="text/calendar" version="2.0"/>
|
|
* </calendar-data-types>
|
|
* <attachmens>
|
|
* <inline/>
|
|
* <external/>
|
|
* </attachments>
|
|
* <max-content-length>102400</max-content-length>
|
|
* <min-date-time>19910101T000000Z</min-date-time>
|
|
* <max-date-time>20381231T000000Z</max-date-time>
|
|
* <max-instances>150</max-instances>
|
|
* <max-recipients>250</max-recipients>
|
|
* <administrator>mailto:ischedule-admin@example.com</administrator>
|
|
* </capabilities>
|
|
* </query-result>
|
|
*/
|
|
public function get()
|
|
{
|
|
if (!isset($_GET['action']) || $_GET['action'] !== 'capabilities')
|
|
{
|
|
error_log(__METHOD__."() invalid iSchedule request using GET without action=capabilities!");
|
|
header("HTTP/1.1 400 Bad Request");
|
|
return;
|
|
}
|
|
|
|
// generate capabilities
|
|
/*$xml = new XMLWriter;
|
|
$xml->openMemory();
|
|
$xml->setIndent(true);
|
|
$xml->startDocument('1.0', 'UTF-8');
|
|
$xml->startElementNs(null, 'query-result', self::ISCHEDULE);
|
|
$xml->startElement('capability-set');
|
|
|
|
foreach(array(
|
|
'versions' => array('version' => array('1.0')),
|
|
'scheduling-messages' => array(
|
|
'component' => array('.name' => array(
|
|
'VEVENT' => array('method' => array('REQUEST', 'ADD', 'REPLY', 'CANCEL')),
|
|
'VTODO' => '',
|
|
'VFREEBUSY' => '',
|
|
)),
|
|
)
|
|
) as $name => $data)
|
|
{
|
|
$xml->writeElement($name, $data);
|
|
}
|
|
|
|
$xml->endElement(); // capability-set
|
|
$xml->endElement(); // query-result
|
|
$xml->endDocument();
|
|
$capabilities = $xml->outputMemory();*/
|
|
|
|
$capabilities = '<?xml version="1.0" encoding="utf-8" ?>
|
|
<query-result xmlns="urn:ietf:params:xml:ns:ischedule">
|
|
<capabilities>
|
|
<serial-number>'.self::SERIAL.'</serial-number>
|
|
<versions>
|
|
<version>1.0</version>
|
|
</versions>
|
|
<scheduling-messages>
|
|
<component name="VEVENT">
|
|
<method name="REQUEST"/>
|
|
<method name="ADD"/>
|
|
<method name="REPLY"/>
|
|
<method name="CANCEL"/>
|
|
</component>
|
|
<component name="VTODO"/>
|
|
<component name="VFREEBUSY"/>
|
|
</scheduling-messages>
|
|
<calendar-data-types>
|
|
<calendar-data-type content-type="text/calendar" version="2.0"/>
|
|
</calendar-data-types>
|
|
<attachments>
|
|
<inline/>
|
|
<external/>
|
|
</attachments>
|
|
<max-content-length>102400</max-content-length>
|
|
<min-date-time>19910101T000000Z</min-date-time>
|
|
<max-date-time>20381231T000000Z</max-date-time>
|
|
<max-instances>150</max-instances>
|
|
<max-recipients>250</max-recipients>
|
|
<administrator>mailto:ischedule-admin@example.com</administrator>
|
|
</capabilities>
|
|
</query-result>';
|
|
|
|
// returning capabilities
|
|
header('Content-Type: application/xml; charset=utf-8');
|
|
header('iSchedule-Version: '.self::VERSION);
|
|
header('iSchedule-Capabilities: '.self::SERIAL);
|
|
header('Content-Length: '.bytes($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 = $e->getMessage();
|
|
if (!in_array($code, array(400, 403, 407, 503))) $code = 500;
|
|
header('HTTP/1.1 '.$code.' '.$msg, true, $code);
|
|
|
|
// if our groupdav logging is active, log the request plus a trace, if enabled in server-config
|
|
if (groupdav::$request_starttime && isset(self::$instance))
|
|
{
|
|
if ($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;
|
|
}
|
|
}
|