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xmpphp/XMPPHP/XMPP.php

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<?php
/**
* XMPPHP: The PHP XMPP Library
* Copyright (C) 2008 Nathanael C. Fritz
* This file is part of SleekXMPP.
*
* XMPPHP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* XMPPHP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XMPPHP; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category xmpphp
* @package XMPPHP
* @author Nathanael C. Fritz <JID: fritzy@netflint.net>
* @author Stephan Wentz <JID: stephan@jabber.wentz.it>
* @author Michael Garvin <JID: gar@netflint.net>
* @copyright 2008 Nathanael C. Fritz
*/
/** XMPPHP_XMLStream */
require_once dirname(__FILE__) . '/XMLStream.php';
require_once dirname(__FILE__) . '/Roster.php';
/**
* XMPPHP Main Class
*
* @category xmpphp
* @package XMPPHP
* @author Nathanael C. Fritz <JID: fritzy@netflint.net>
* @author Stephan Wentz <JID: stephan@jabber.wentz.it>
* @author Michael Garvin <JID: gar@netflint.net>
* @copyright 2008 Nathanael C. Fritz
* @version $Id$
*/
class XMPPHP_XMPP extends XMPPHP_XMLStream {
/**
* @var string
*/
public $server;
/**
* @var string
*/
public $user;
/**
* @var string
*/
protected $password;
/**
* @var string
*/
protected $resource;
/**
* @var string
*/
protected $fulljid;
/**
* @var string
*/
protected $basejid;
/**
* @var boolean
*/
protected $authed = false;
protected $session_started = false;
/**
* @var boolean
*/
protected $auto_subscribe = false;
/**
* @var boolean
*/
protected $use_encryption = true;
/**
* @var boolean
*/
public $track_presence = true;
/**
* @var object
*/
public $roster;
/**
* @var array supported auth mechanisms
*/
protected $auth_mechanism_supported = array('PLAIN', 'DIGEST-MD5');
/**
* @var string default auth mechanism
*/
protected $auth_mechanism_default = 'PLAIN';
/**
* @var string prefered auth mechanism
*/
protected $auth_mechanism_preferred = 'DIGEST-MD5';
/**
* Constructor
*
* @param string $host
* @param integer $port
* @param string $user
* @param string $password
* @param string $resource
* @param string $server
* @param boolean $printlog
* @param string $loglevel
*/
public function __construct($host, $port, $user, $password, $resource, $server = null, $printlog = false, $loglevel = null) {
parent::__construct($host, $port, $printlog, $loglevel);
$this->user = $user;
$this->password = $password;
$this->resource = $resource;
if(!$server) $server = $host;
$this->server = $server;
$this->basejid = $this->user . '@' . $this->host;
$this->roster = new Roster();
$this->track_presence = true;
$this->stream_start = '<stream:stream to="' . $server . '" xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" version="1.0">';
$this->stream_end = '</stream:stream>';
$this->default_ns = 'jabber:client';
$this->addXPathHandler('{http://etherx.jabber.org/streams}features', 'features_handler');
$this->addXPathHandler('{urn:ietf:params:xml:ns:xmpp-sasl}success', 'sasl_success_handler');
$this->addXPathHandler('{urn:ietf:params:xml:ns:xmpp-sasl}failure', 'sasl_failure_handler');
$this->addXPathHandler('{urn:ietf:params:xml:ns:xmpp-tls}proceed', 'tls_proceed_handler');
$this->addXPathHandler('{jabber:client}message', 'message_handler');
$this->addXPathHandler('{jabber:client}presence', 'presence_handler');
$this->addXPathHandler('iq/{jabber:iq:roster}query', 'roster_iq_handler');
// For DIGEST-MD5 auth :
$this->addXPathHandler('{urn:ietf:params:xml:ns:xmpp-sasl}challenge', 'sasl_challenge_handler');
}
/**
* Turn encryption on/ff
*
* @param boolean $useEncryption
*/
public function useEncryption($useEncryption = true) {
$this->use_encryption = $useEncryption;
}
/**
* Turn on auto-authorization of subscription requests.
*
* @param boolean $autoSubscribe
*/
public function autoSubscribe($autoSubscribe = true) {
$this->auto_subscribe = $autoSubscribe;
}
/**
* Send XMPP Message
*
* @param string $to
* @param string $body
* @param string $type
* @param string $subject
*/
public function message($to, $body, $type = 'chat', $subject = null, $payload = null) {
if(is_null($type))
{
$type = 'chat';
}
$to = htmlspecialchars($to);
$body = htmlspecialchars($body);
$subject = htmlspecialchars($subject);
$out = "<message from=\"{$this->fulljid}\" to=\"$to\" type='$type'>";
if($subject) $out .= "<subject>$subject</subject>";
$out .= "<body>$body</body>";
if($payload) $out .= $payload;
$out .= "</message>";
$this->send($out);
}
/**
* Set Presence
*
* @param string $status
* @param string $show
* @param string $to
*/
public function presence($status = null, $show = 'available', $to = null, $type='available', $priority=null) {
if($type == 'available') $type = '';
$to = htmlspecialchars($to);
$status = htmlspecialchars($status);
if($show == 'unavailable') $type = 'unavailable';
$out = "<presence";
if($to) $out .= " to=\"$to\"";
if($type) $out .= " type='$type'";
if($show == 'available' and !$status) {
$out .= "/>";
} else {
$out .= ">";
if($show != 'available') $out .= "<show>$show</show>";
if($status) $out .= "<status>$status</status>";
if($priority !== null) $out .= "<priority>$priority</priority>";
$out .= "</presence>";
}
$this->send($out);
}
/**
* Send Auth request
*
* @param string $jid
*/
public function subscribe($jid) {
$this->send("<presence type='subscribe' to='{$jid}' from='{$this->fulljid}' />");
#$this->send("<presence type='subscribed' to='{$jid}' from='{$this->fulljid}' />");
}
/**
* Add user to Roster
*
* @param string $jid
* @param string $name
*/
public function RosterAddUser($jid, $name=null, $group=null) {
$payload = "<item jid='$jid'".($name ? " name='" . htmlspecialchars($name) . "'" : '')."/>\n".
($group?'<group>'.htmlspecialchars($group, ENT_QUOTES, 'UTF-8').'</group>':'');
$this->SendIq(NULL, 'set', "jabber:iq:roster", $payload);
}
/**
* Send ID action
*
* @param string $to
* @param string $type
* @param string $xmlns
* @param string $payload
* @param string $from
*/
private function sendIq($to = NULL, $type = 'get', $xmlns = NULL, $payload = NULL, $from = NULL)
{
$id = $this->getID();
$xml = "<iq type='$type' id='$id'".
($to ? " to='$to'" : '').
($from ? " from='$from'" : '').
">
<query xmlns='$xmlns'>
$payload
</query>
</iq>";
return $this->send($xml);
}
/**
* Message handler
*
* @param string $xml
*/
public function message_handler($xml) {
if(isset($xml->attrs['type'])) {
$payload['type'] = $xml->attrs['type'];
} else {
$payload['type'] = 'chat';
}
$body = $xml->sub('body');
$payload['from'] = $xml->attrs['from'];
$payload['body'] = is_object($body) ? $body->data : FALSE; // $xml->sub('body')->data;
$payload['xml'] = $xml;
$this->log->log("Message: {$payload['body']}", XMPPHP_Log::LEVEL_DEBUG);
$this->event('message', $payload);
}
/**
* Presence handler
*
* @param string $xml
*/
public function presence_handler($xml) {
$payload['type'] = (isset($xml->attrs['type'])) ? $xml->attrs['type'] : 'available';
$payload['show'] = (isset($xml->sub('show')->data)) ? $xml->sub('show')->data : $payload['type'];
$payload['from'] = $xml->attrs['from'];
$payload['status'] = (isset($xml->sub('status')->data)) ? $xml->sub('status')->data : '';
$payload['priority'] = (isset($xml->sub('priority')->data)) ? intval($xml->sub('priority')->data) : 0;
$payload['xml'] = $xml;
if($this->track_presence) {
$this->roster->setPresence($payload['from'], $payload['priority'], $payload['show'], $payload['status']);
}
$this->log->log("Presence: {$payload['from']} [{$payload['show']}] {$payload['status']}", XMPPHP_Log::LEVEL_DEBUG);
if(array_key_exists('type', $xml->attrs) and $xml->attrs['type'] == 'subscribe') {
if($this->auto_subscribe) {
$this->send("<presence type='subscribed' to='{$xml->attrs['from']}' from='{$this->fulljid}' />");
$this->send("<presence type='subscribe' to='{$xml->attrs['from']}' from='{$this->fulljid}' />");
}
$this->event('subscription_requested', $payload);
} elseif(array_key_exists('type', $xml->attrs) and $xml->attrs['type'] == 'subscribed') {
$this->event('subscription_accepted', $payload);
} else {
$this->event('presence', $payload);
}
}
/**
* Features handler
*
* @param string $xml
*/
protected function features_handler($xml) {
if($xml->hasSub('starttls') and $this->use_encryption) {
$this->send("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'><required /></starttls>");
} elseif($xml->hasSub('bind') and $this->authed) {
$id = $this->getId();
$this->addIdHandler($id, 'resource_bind_handler');
$this->send("<iq xmlns=\"jabber:client\" type=\"set\" id=\"$id\"><bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\"><resource>{$this->resource}</resource></bind></iq>");
} else {
$this->log->log("Attempting Auth...");
if ($this->password) {
$mechanism = 'PLAIN'; // default;
if ($xml->hasSub('mechanisms') && $xml->sub('mechanisms')->hasSub('mechanism')) {
// Get the list of all available auth mechanism that we can use
$available = array();
foreach ($xml->sub('mechanisms')->subs as $sub) {
if ($sub->name == 'mechanism') {
if (in_array($sub->data, $this->auth_mechanism_supported)) {
$available[$sub->data] = $sub->data;
}
}
}
if (isset($available[$this->auth_mechanism_preferred])) {
$mechanism = $this->auth_mechanism_preferred;
} else {
// use the first available
$mechanism = reset($available);
}
$this->log->log("Trying $mechanism (available : " . implode(',', $available) . ')');
}
switch ($mechanism) {
case 'PLAIN':
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>" . base64_encode("\x00" . $this->user . "\x00" . $this->password) . "</auth>");
break;
case 'DIGEST-MD5':
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='DIGEST-MD5' />");
break;
}
} else {
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'/>");
}
}
}
/**
* SASL success handler
*
* @param string $xml
*/
protected function sasl_success_handler($xml) {
$this->log->log("Auth success!");
$this->authed = true;
$this->reset();
}
/**
* SASL feature handler
*
* @param string $xml
*/
protected function sasl_failure_handler($xml) {
$this->log->log("Auth failed!", XMPPHP_Log::LEVEL_ERROR);
$this->disconnect();
throw new XMPPHP_Exception('Auth failed!');
}
/**
* Handle challenges for DIGEST-MD5 auth
*
* @param string $xml
*/
protected function sasl_challenge_handler($xml) {
// Decode and parse the challenge string
// (may be something like foo="bar",foo2="bar2,bar3,bar4",foo3=bar5 )
$challenge = base64_decode($xml->data);
$vars = array();
$matches = array();
preg_match_all('/(\w+)=(?:"([^"]*)|([^,]*))/', $challenge, $matches);
$res = array();
foreach ($matches[1] as $k => $v) {
$vars[$v] = (empty($matches[2][$k])?$matches[3][$k]:$matches[2][$k]);
}
if (isset($vars['nonce'])) {
// First step
$vars['cnonce'] = uniqid(mt_rand(), false);
$vars['nc'] = '00000001';
$vars['qop'] = 'auth'; // Force qop to auth
if (!isset($vars['digest-uri'])) $vars['digest-uri'] = 'xmpp/' . $this->server;
if (!isset($vars['realm'])) $vars['realm'] = '';
// now, the magic...
$a1 = sprintf('%s:%s:%s', $this->user, $vars['realm'], $this->password);
if ($vars['algorithm'] == 'md5-sess') {
$a1 = pack('H32',md5($a1)) . ':' . $vars['nonce'] . ':' . $vars['cnonce'];
}
$a2 = "AUTHENTICATE:" . $vars['digest-uri'];
$password = md5($a1) . ':' . $vars['nonce'] . ':' . $vars['nc'] . ':' . $vars['cnonce'] . ':' . $vars['qop'] . ':' .md5($a2);
$password = md5($password);
$response = sprintf('username="%s",realm="%s",nonce="%s",cnonce="%s",nc=%s,qop=%s,digest-uri="%s",response=%s,charset=utf-8',
$this->user, $vars['realm'], $vars['nonce'], $vars['cnonce'], $vars['nc'], $vars['qop'], $vars['digest-uri'], $password);
// Send the response
$response = base64_encode($response);
$this->send("<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>$response</response>");
} else {
if (isset($vars['rspauth'])) {
// Second step
$this->send("<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
} else {
$this->log->log("ERROR receiving challenge : " . $challenge, XMPPHP_Log::LEVEL_ERROR);
}
}
}
/**
* Resource bind handler
*
* @param string $xml
*/
protected function resource_bind_handler($xml) {
if($xml->attrs['type'] == 'result') {
$this->log->log("Bound to " . $xml->sub('bind')->sub('jid')->data);
$this->fulljid = $xml->sub('bind')->sub('jid')->data;
$jidarray = explode('/',$this->fulljid);
$this->jid = $jidarray[0];
}
$id = $this->getId();
$this->addIdHandler($id, 'session_start_handler');
$this->send("<iq xmlns='jabber:client' type='set' id='$id'><session xmlns='urn:ietf:params:xml:ns:xmpp-session' /></iq>");
}
/**
* Retrieves the roster
*
*/
public function getRoster() {
$id = $this->getID();
$this->send("<iq xmlns='jabber:client' type='get' id='$id'><query xmlns='jabber:iq:roster' /></iq>");
}
/**
* Roster iq handler
* Gets all packets matching XPath "iq/{jabber:iq:roster}query'
*
* @param string $xml
*/
protected function roster_iq_handler($xml) {
$status = "result";
$xmlroster = $xml->sub('query');
foreach($xmlroster->subs as $item) {
$groups = array();
if ($item->name == 'item') {
$jid = $item->attrs['jid']; //REQUIRED
$name = $item->attrs['name']; //MAY
$subscription = $item->attrs['subscription'];
foreach($item->subs as $subitem) {
if ($subitem->name == 'group') {
$groups[] = $subitem->data;
}
}
$contacts[] = array($jid, $subscription, $name, $groups); //Store for action if no errors happen
} else {
$status = "error";
}
}
if ($status == "result") { //No errors, add contacts
foreach($contacts as $contact) {
$this->roster->addContact($contact[0], $contact[1], $contact[2], $contact[3]);
}
}
if ($xml->attrs['type'] == 'set') {
$this->send("<iq type=\"reply\" id=\"{$xml->attrs['id']}\" to=\"{$xml->attrs['from']}\" />");
}
}
/**
* Session start handler
*
* @param string $xml
*/
protected function session_start_handler($xml) {
$this->log->log("Session started");
$this->session_started = true;
$this->event('session_start');
}
/**
* TLS proceed handler
*
* @param string $xml
*/
protected function tls_proceed_handler($xml) {
$this->log->log("Starting TLS encryption");
stream_socket_enable_crypto($this->socket, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
$this->reset();
}
/**
* Retrieves the vcard
*
*/
public function getVCard($jid = Null) {
$id = $this->getID();
$this->addIdHandler($id, 'vcard_get_handler');
if($jid) {
$this->send("<iq type='get' id='$id' to='$jid'><vCard xmlns='vcard-temp' /></iq>");
} else {
$this->send("<iq type='get' id='$id'><vCard xmlns='vcard-temp' /></iq>");
}
}
/**
* VCard retrieval handler
*
* @param XML Object $xml
*/
protected function vcard_get_handler($xml) {
$vcard_array = array();
$vcard = $xml->sub('vcard');
// go through all of the sub elements and add them to the vcard array
foreach ($vcard->subs as $sub) {
if ($sub->subs) {
$vcard_array[$sub->name] = array();
foreach ($sub->subs as $sub_child) {
$vcard_array[$sub->name][$sub_child->name] = $sub_child->data;
}
} else {
$vcard_array[$sub->name] = $sub->data;
}
}
$vcard_array['from'] = $xml->attrs['from'];
$this->event('vcard', $vcard_array);
}
}
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