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|
<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
*
* Jabber class from Flyspray project
*
* @version class.jabber2.php 1595 2008-09-19 (0.9.9)
* @copyright 2006 Flyspray.org
* @author Florian Schmitz (floele)
*
* Only slightly modified by Acyd Burn
*/
class jabber
{
var $connection = null;
var $session = array();
var $timeout = 10;
var $server;
var $connect_server;
var $port;
var $username;
var $password;
var $use_ssl;
var $resource = 'functions_jabber.phpbb.php';
var $enable_logging;
var $log_array;
var $features = array();
/**
*/
function jabber($server, $port, $username, $password, $use_ssl = false)
{
$this->connect_server = ($server) ? $server : 'localhost';
$this->port = ($port) ? $port : 5222;
// Get the server and the username
if (strpos($username, '@') === false)
{
$this->server = $this->connect_server;
$this->username = $username;
}
else
{
$jid = explode('@', $username, 2);
$this->username = $jid[0];
$this->server = $jid[1];
}
$this->password = $password;
$this->use_ssl = ($use_ssl && self::can_use_ssl()) ? true : false;
// Change port if we use SSL
if ($this->port == 5222 && $this->use_ssl)
{
$this->port = 5223;
}
$this->enable_logging = true;
$this->log_array = array();
}
/**
* Able to use the SSL functionality?
*/
static public function can_use_ssl()
{
// Will not work with PHP >= 5.2.1 or < 5.2.3RC2 until timeout problem with ssl hasn't been fixed (http://bugs.php.net/41236)
return ((version_compare(PHP_VERSION, '5.2.1', '<') || version_compare(PHP_VERSION, '5.2.3RC2', '>=')) && @extension_loaded('openssl')) ? true : false;
}
/**
* Able to use TLS?
*/
static public function can_use_tls()
{
if (!@extension_loaded('openssl') || !function_exists('stream_socket_enable_crypto') || !function_exists('stream_get_meta_data') || !function_exists('socket_set_blocking') || !function_exists('stream_get_wrappers'))
{
return false;
}
/**
* Make sure the encryption stream is supported
* Also seem to work without the crypto stream if correctly compiled
$streams = stream_get_wrappers();
if (!in_array('streams.crypto', $streams))
{
return false;
}
*/
return true;
}
/**
* Sets the resource which is used. No validation is done here, only escaping.
* @param string $name
* @access public
*/
function set_resource($name)
{
$this->resource = $name;
}
/**
* Connect
*/
function connect()
{
/* if (!$this->check_jid($this->username . '@' . $this->server))
{
$this->add_to_log('Error: Jabber ID is not valid: ' . $this->username . '@' . $this->server);
return false;
}*/
$this->session['ssl'] = $this->use_ssl;
if ($this->open_socket($this->connect_server, $this->port, $this->use_ssl))
{
$this->send("<?xml version='1.0' encoding='UTF-8' ?" . ">\n");
$this->send("<stream:stream to='{$this->server}' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>\n");
}
else
{
$this->add_to_log('Error: connect() #2');
return false;
}
// Now we listen what the server has to say...and give appropriate responses
$this->response($this->listen());
return true;
}
/**
* Disconnect
*/
function disconnect()
{
if ($this->connected())
{
// disconnect gracefully
if (isset($this->session['sent_presence']))
{
$this->send_presence('offline', '', true);
}
$this->send('</stream:stream>');
$this->session = array();
return fclose($this->connection);
}
return false;
}
/**
* Connected?
*/
function connected()
{
return (is_resource($this->connection) && !feof($this->connection)) ? true : false;
}
/**
* Initiates login (using data from contructor, after calling connect())
* @access public
* @return bool
*/
function login()
{
if (!sizeof($this->features))
{
$this->add_to_log('Error: No feature information from server available.');
return false;
}
return $this->response($this->features);
}
/**
* Send data to the Jabber server
* @param string $xml
* @access public
* @return bool
*/
function send($xml)
{
if ($this->connected())
{
$xml = trim($xml);
$this->add_to_log('SEND: '. $xml);
return fwrite($this->connection, $xml);
}
else
{
$this->add_to_log('Error: Could not send, connection lost (flood?).');
return false;
}
}
/**
* OpenSocket
* @param string $server host to connect to
* @param int $port port number
* @param bool $use_ssl use ssl or not
* @access public
* @return bool
*/
function open_socket($server, $port, $use_ssl = false)
{
if (@function_exists('dns_get_record'))
{
$record = @dns_get_record("_xmpp-client._tcp.$server", DNS_SRV);
if (!empty($record) && !empty($record[0]['target']))
{
$server = $record[0]['target'];
}
}
$server = $use_ssl ? 'ssl://' . $server : $server;
if ($this->connection = @fsockopen($server, $port, $errorno, $errorstr, $this->timeout))
{
socket_set_blocking($this->connection, 0);
socket_set_timeout($this->connection, 60);
return true;
}
// Apparently an error occurred...
$this->add_to_log('Error: open_socket() - ' . $errorstr);
return false;
}
/**
* Return log
*/
function get_log()
{
if ($this->enable_logging && sizeof($this->log_array))
{
return implode("<br /><br />", $this->log_array);
}
return '';
}
/**
* Add information to log
*/
function add_to_log($string)
{
if ($this->enable_logging)
{
$this->log_array[] = utf8_htmlspecialchars($string);
}
}
/**
* Listens to the connection until it gets data or the timeout is reached.
* Thus, it should only be called if data is expected to be received.
* @access public
* @return mixed either false for timeout or an array with the received data
*/
function listen($timeout = 10, $wait = false)
{
if (!$this->connected())
{
return false;
}
// Wait for a response until timeout is reached
$start = time();
$data = '';
do
{
$read = trim(fread($this->connection, 4096));
$data .= $read;
}
while (time() <= $start + $timeout && !feof($this->connection) && ($wait || $data == '' || $read != '' || (substr(rtrim($data), -1) != '>')));
if ($data != '')
{
$this->add_to_log('RECV: '. $data);
return $this->xmlize($data);
}
else
{
$this->add_to_log('Timeout, no response from server.');
return false;
}
}
/**
* Initiates account registration (based on data used for contructor)
* @access public
* @return bool
*/
function register()
{
if (!isset($this->session['id']) || isset($this->session['jid']))
{
$this->add_to_log('Error: Cannot initiate registration.');
return false;
}
$this->send("<iq type='get' id='reg_1'><query xmlns='jabber:iq:register'/></iq>");
return $this->response($this->listen());
}
/**
* Sets account presence. No additional info required (default is "online" status)
* @param $message online, offline...
* @param $type dnd, away, chat, xa or nothing
* @param $unavailable set this to true if you want to become unavailable
* @access public
* @return bool
*/
function send_presence($message = '', $type = '', $unavailable = false)
{
if (!isset($this->session['jid']))
{
$this->add_to_log('ERROR: send_presence() - Cannot set presence at this point, no jid given.');
return false;
}
$type = strtolower($type);
$type = (in_array($type, array('dnd', 'away', 'chat', 'xa'))) ? '<show>'. $type .'</show>' : '';
$unavailable = ($unavailable) ? " type='unavailable'" : '';
$message = ($message) ? '<status>' . utf8_htmlspecialchars($message) .'</status>' : '';
$this->session['sent_presence'] = !$unavailable;
return $this->send("<presence$unavailable>" . $type . $message . '</presence>');
}
/**
* This handles all the different XML elements
* @param array $xml
* @access public
* @return bool
*/
function response($xml)
{
if (!is_array($xml) || !sizeof($xml))
{
return false;
}
// did we get multiple elements? do one after another
// array('message' => ..., 'presence' => ...)
if (sizeof($xml) > 1)
{
foreach ($xml as $key => $value)
{
$this->response(array($key => $value));
}
return;
}
else
{
// or even multiple elements of the same type?
// array('message' => array(0 => ..., 1 => ...))
if (sizeof(reset($xml)) > 1)
{
foreach (reset($xml) as $value)
{
$this->response(array(key($xml) => array(0 => $value)));
}
return;
}
}
switch (key($xml))
{
case 'stream:stream':
// Connection initialised (or after authentication). Not much to do here...
if (isset($xml['stream:stream'][0]['#']['stream:features']))
{
// we already got all info we need
$this->features = $xml['stream:stream'][0]['#'];
}
else
{
$this->features = $this->listen();
}
$second_time = isset($this->session['id']);
$this->session['id'] = $xml['stream:stream'][0]['@']['id'];
if ($second_time)
{
// If we are here for the second time after TLS, we need to continue logging in
return $this->login();
}
// go on with authentication?
if (isset($this->features['stream:features'][0]['#']['bind']) || !empty($this->session['tls']))
{
return $this->response($this->features);
}
break;
case 'stream:features':
// Resource binding after successful authentication
if (isset($this->session['authenticated']))
{
// session required?
$this->session['sess_required'] = isset($xml['stream:features'][0]['#']['session']);
$this->send("<iq type='set' id='bind_1'>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>
<resource>" . utf8_htmlspecialchars($this->resource) . '</resource>
</bind>
</iq>');
return $this->response($this->listen());
}
// Let's use TLS if SSL is not enabled and we can actually use it
if (!$this->session['ssl'] && self::can_use_tls() && self::can_use_ssl() && isset($xml['stream:features'][0]['#']['starttls']))
{
$this->add_to_log('Switching to TLS.');
$this->send("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>\n");
return $this->response($this->listen());
}
// Does the server support SASL authentication?
// I hope so, because we do (and no other method).
if (isset($xml['stream:features'][0]['#']['mechanisms'][0]['@']['xmlns']) && $xml['stream:features'][0]['#']['mechanisms'][0]['@']['xmlns'] == 'urn:ietf:params:xml:ns:xmpp-sasl')
{
// Now decide on method
$methods = array();
foreach ($xml['stream:features'][0]['#']['mechanisms'][0]['#']['mechanism'] as $value)
{
$methods[] = $value['#'];
}
// we prefer DIGEST-MD5
// we don't want to use plain authentication (neither does the server usually) if no encryption is in place
// http://www.xmpp.org/extensions/attic/jep-0078-1.7.html
// The plaintext mechanism SHOULD NOT be used unless the underlying stream is encrypted (using SSL or TLS)
// and the client has verified that the server certificate is signed by a trusted certificate authority.
if (in_array('DIGEST-MD5', $methods))
{
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='DIGEST-MD5'/>");
}
else if (in_array('PLAIN', $methods) && ($this->session['ssl'] || !empty($this->session['tls'])))
{
// http://www.ietf.org/rfc/rfc4616.txt (PLAIN SASL Mechanism)
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>"
. base64_encode($this->username . '@' . $this->server . chr(0) . $this->username . chr(0) . $this->password) .
'</auth>');
}
else if (in_array('ANONYMOUS', $methods))
{
$this->send("<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'/>");
}
else
{
// not good...
$this->add_to_log('Error: No authentication method supported.');
$this->disconnect();
return false;
}
return $this->response($this->listen());
}
else
{
// ok, this is it. bye.
$this->add_to_log('Error: Server does not offer SASL authentication.');
$this->disconnect();
return false;
}
break;
case 'challenge':
// continue with authentication...a challenge literally -_-
$decoded = base64_decode($xml['challenge'][0]['#']);
$decoded = $this->parse_data($decoded);
if (!isset($decoded['digest-uri']))
{
$decoded['digest-uri'] = 'xmpp/'. $this->server;
}
// better generate a cnonce, maybe it's needed
$decoded['cnonce'] = base64_encode(md5(uniqid(mt_rand(), true)));
// second challenge?
if (isset($decoded['rspauth']))
{
$this->send("<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
}
else
{
// Make sure we only use 'auth' for qop (relevant for $this->encrypt_password())
// If the <response> is choking up on the changed parameter we may need to adjust encrypt_password() directly
if (isset($decoded['qop']) && $decoded['qop'] != 'auth' && strpos($decoded['qop'], 'auth') !== false)
{
$decoded['qop'] = 'auth';
}
$response = array(
'username' => $this->username,
'response' => $this->encrypt_password(array_merge($decoded, array('nc' => '00000001'))),
'charset' => 'utf-8',
'nc' => '00000001',
'qop' => 'auth', // only auth being supported
);
foreach (array('nonce', 'digest-uri', 'realm', 'cnonce') as $key)
{
if (isset($decoded[$key]))
{
$response[$key] = $decoded[$key];
}
}
$this->send("<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" . base64_encode($this->implode_data($response)) . '</response>');
}
return $this->response($this->listen());
break;
case 'failure':
$this->add_to_log('Error: Server sent "failure".');
$this->disconnect();
return false;
break;
case 'proceed':
// continue switching to TLS
$meta = stream_get_meta_data($this->connection);
socket_set_blocking($this->connection, 1);
if (!stream_socket_enable_crypto($this->connection, true, STREAM_CRYPTO_METHOD_TLS_CLIENT))
{
$this->add_to_log('Error: TLS mode change failed.');
return false;
}
socket_set_blocking($this->connection, $meta['blocked']);
$this->session['tls'] = true;
// new stream
$this->send("<?xml version='1.0' encoding='UTF-8' ?" . ">\n");
$this->send("<stream:stream to='{$this->server}' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>\n");
return $this->response($this->listen());
break;
case 'success':
// Yay, authentication successful.
$this->send("<stream:stream to='{$this->server}' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>\n");
$this->session['authenticated'] = true;
// we have to wait for another response
return $this->response($this->listen());
break;
case 'iq':
// we are not interested in IQs we did not expect
if (!isset($xml['iq'][0]['@']['id']))
{
return false;
}
// multiple possibilities here
switch ($xml['iq'][0]['@']['id'])
{
case 'bind_1':
$this->session['jid'] = $xml['iq'][0]['#']['bind'][0]['#']['jid'][0]['#'];
// and (maybe) yet another request to be able to send messages *finally*
if ($this->session['sess_required'])
{
$this->send("<iq to='{$this->server}' type='set' id='sess_1'>
<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>
</iq>");
return $this->response($this->listen());
}
return true;
break;
case 'sess_1':
return true;
break;
case 'reg_1':
$this->send("<iq type='set' id='reg_2'>
<query xmlns='jabber:iq:register'>
<username>" . utf8_htmlspecialchars($this->username) . "</username>
<password>" . utf8_htmlspecialchars($this->password) . "</password>
</query>
</iq>");
return $this->response($this->listen());
break;
case 'reg_2':
// registration end
if (isset($xml['iq'][0]['#']['error']))
{
$this->add_to_log('Warning: Registration failed.');
return false;
}
return true;
break;
case 'unreg_1':
return true;
break;
default:
$this->add_to_log('Notice: Received unexpected IQ.');
return false;
break;
}
break;
case 'message':
// we are only interested in content...
if (!isset($xml['message'][0]['#']['body']))
{
return false;
}
$message['body'] = $xml['message'][0]['#']['body'][0]['#'];
$message['from'] = $xml['message'][0]['@']['from'];
if (isset($xml['message'][0]['#']['subject']))
{
$message['subject'] = $xml['message'][0]['#']['subject'][0]['#'];
}
$this->session['messages'][] = $message;
break;
default:
// hm...don't know this response
$this->add_to_log('Notice: Unknown server response (' . key($xml) . ')');
return false;
break;
}
}
function send_message($to, $text, $subject = '', $type = 'normal')
{
if (!isset($this->session['jid']))
{
return false;
}
if (!in_array($type, array('chat', 'normal', 'error', 'groupchat', 'headline')))
{
$type = 'normal';
}
return $this->send("<message from='" . utf8_htmlspecialchars($this->session['jid']) . "' to='" . utf8_htmlspecialchars($to) . "' type='$type' id='" . uniqid('msg') . "'>
<subject>" . utf8_htmlspecialchars($subject) . "</subject>
<body>" . utf8_htmlspecialchars($text) . "</body>
</message>"
);
}
/**
* Encrypts a password as in RFC 2831
* @param array $data Needs data from the client-server connection
* @access public
* @return string
*/
function encrypt_password($data)
{
// let's me think about <challenge> again...
foreach (array('realm', 'cnonce', 'digest-uri') as $key)
{
if (!isset($data[$key]))
{
$data[$key] = '';
}
}
$pack = md5($this->username . ':' . $data['realm'] . ':' . $this->password);
if (isset($data['authzid']))
{
$a1 = pack('H32', $pack) . sprintf(':%s:%s:%s', $data['nonce'], $data['cnonce'], $data['authzid']);
}
else
{
$a1 = pack('H32', $pack) . sprintf(':%s:%s', $data['nonce'], $data['cnonce']);
}
// should be: qop = auth
$a2 = 'AUTHENTICATE:'. $data['digest-uri'];
return md5(sprintf('%s:%s:%s:%s:%s:%s', md5($a1), $data['nonce'], $data['nc'], $data['cnonce'], $data['qop'], md5($a2)));
}
/**
* parse_data like a="b",c="d",... or like a="a, b", c, d="e", f=g,...
* @param string $data
* @access public
* @return array a => b ...
*/
function parse_data($data)
{
$data = explode(',', $data);
$pairs = array();
$key = false;
foreach ($data as $pair)
{
$dd = strpos($pair, '=');
if ($dd)
{
$key = trim(substr($pair, 0, $dd));
$pairs[$key] = trim(trim(substr($pair, $dd + 1)), '"');
}
else if (strpos(strrev(trim($pair)), '"') === 0 && $key)
{
// We are actually having something left from "a, b" values, add it to the last one we handled.
$pairs[$key] .= ',' . trim(trim($pair), '"');
continue;
}
}
return $pairs;
}
/**
* opposite of jabber::parse_data()
* @param array $data
* @access public
* @return string
*/
function implode_data($data)
{
$return = array();
foreach ($data as $key => $value)
{
$return[] = $key . '="' . $value . '"';
}
return implode(',', $return);
}
/**
* xmlize()
* @author Hans Anderson
* @copyright Hans Anderson / http://www.hansanderson.com/php/xml/
*/
function xmlize($data, $skip_white = 1, $encoding = 'UTF-8')
{
$data = trim($data);
if (substr($data, 0, 5) != '<?xml')
{
// mod
$data = '<root>'. $data . '</root>';
}
$vals = $index = $array = array();
$parser = xml_parser_create($encoding);
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, $skip_white);
xml_parse_into_struct($parser, $data, $vals, $index);
xml_parser_free($parser);
$i = 0;
$tagname = $vals[$i]['tag'];
$array[$tagname][0]['@'] = (isset($vals[$i]['attributes'])) ? $vals[$i]['attributes'] : array();
$array[$tagname][0]['#'] = $this->_xml_depth($vals, $i);
if (substr($data, 0, 5) != '<?xml')
{
$array = $array['root'][0]['#'];
}
return $array;
}
/**
* _xml_depth()
* @author Hans Anderson
* @copyright Hans Anderson / http://www.hansanderson.com/php/xml/
*/
function _xml_depth($vals, &$i)
{
$children = array();
if (isset($vals[$i]['value']))
{
array_push($children, $vals[$i]['value']);
}
while (++$i < sizeof($vals))
{
switch ($vals[$i]['type'])
{
case 'open':
$tagname = (isset($vals[$i]['tag'])) ? $vals[$i]['tag'] : '';
$size = (isset($children[$tagname])) ? sizeof($children[$tagname]) : 0;
if (isset($vals[$i]['attributes']))
{
$children[$tagname][$size]['@'] = $vals[$i]['attributes'];
}
$children[$tagname][$size]['#'] = $this->_xml_depth($vals, $i);
break;
case 'cdata':
array_push($children, $vals[$i]['value']);
break;
case 'complete':
$tagname = $vals[$i]['tag'];
$size = (isset($children[$tagname])) ? sizeof($children[$tagname]) : 0;
$children[$tagname][$size]['#'] = (isset($vals[$i]['value'])) ? $vals[$i]['value'] : array();
if (isset($vals[$i]['attributes']))
{
$children[$tagname][$size]['@'] = $vals[$i]['attributes'];
}
break;
case 'close':
return $children;
break;
}
}
return $children;
}
}
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