mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-10-07 10:32:11 +02:00
672 lines
22 KiB
PHP
672 lines
22 KiB
PHP
<?php
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/**
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* EGroupware EMailAdmin: Support for Sieve scripts
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*
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* @link http://www.egroupware.org
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* @package emailadmin
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* @author Ralf Becker <rb@stylite.de>
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* @author Klaus Leithoff <kl@stylite.de>
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* @author Lars Kneschke
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @version $Id$
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*/
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include_once('Net/Sieve.php');
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/**
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* Support for Sieve scripts
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*
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* Class can be switched to use exceptions by calling
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*
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* PEAR::setErrorHandling(PEAR_ERROR_EXCEPTION);
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*
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* In which case constructor and setters will throw exceptions for connection, login or other errors.
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*
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* retriveRules and getters will not throw an exception, if there's no script currently.
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*
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* Most methods incl. constructor accept a script-name, but by default current active script is used
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* and if theres no script emailadmin_sieve::DEFAULT_SCRIPT_NAME.
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*/
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class emailadmin_sieve extends Net_Sieve
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{
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/**
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* reference to emailadmin_imap object
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*
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* @var emailadmin_imap
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*/
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var $icServer;
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/**
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* @var string name of active script queried from Sieve server
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*/
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var $scriptName;
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/**
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* @var $rules containing the rules
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*/
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var $rules;
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/**
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* @var $vacation containing the vacation
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*/
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var $vacation;
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/**
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* @var $emailNotification containing the emailNotification
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*/
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var $emailNotification;
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/**
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* @var object $error the last PEAR error object
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*/
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var $error;
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/**
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* The timeout for the connection to the SIEVE server.
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* @var int
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*/
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var $_timeout = 10;
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/**
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* Switch on some error_log debug messages
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*
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* @var boolean
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*/
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var $debug = false;
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/**
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* Default script name used if no active script found on server
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*/
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const DEFAULT_SCRIPT_NAME = 'mail';
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/**
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* Constructor
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*
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* @param emailadmin_imap $_icServer
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* @param string $_euser effictive user, if given the Cyrus admin account is used to login on behalf of $euser
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* @param string $_scriptName
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*/
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function __construct(emailadmin_imap $_icServer=null, $_euser='', $_scriptName=null)
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{
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parent::Net_Sieve();
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if ($_scriptName) $this->scriptName = $_scriptName;
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// TODO: since we seem to have major problems authenticating via DIGEST-MD5 and CRAM-MD5 in SIEVE, we skip MD5-METHODS for now
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if (!is_null($_icServer))
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{
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$_icServer->supportedAuthMethods = array('PLAIN' , 'LOGIN');
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$_icServer->supportedSASLAuthMethods=array();
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}
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else
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{
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$this->supportedAuthMethods = array('PLAIN' , 'LOGIN');
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$this->supportedSASLAuthMethods=array();
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}
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$this->displayCharset = translation::charset();
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if (!is_null($_icServer) && $this->_connect($_icServer, $_euser) === 'die') {
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die('Sieve not activated');
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}
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}
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/**
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* Open connection to the sieve server
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*
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* @param emailadmin_imap $_icServer
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* @param string $euser effictive user, if given the Cyrus admin account is used to login on behalf of $euser
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* @return mixed 'die' = sieve not enabled, false=connect or login failure, true=success
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*/
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function _connect(emailadmin_imap $_icServer, $euser='')
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{
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static $isConError = null;
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static $sieveAuthMethods = null;
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$_icServerID = $_icServer->acc_id;
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if (is_null($isConError))
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{
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$isConError = egw_cache::getCache(egw_cache::INSTANCE, 'email', 'icServerSIEVE_connectionError' . trim($GLOBALS['egw_info']['user']['account_id']));
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}
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if ( isset($isConError[$_icServerID]) )
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{
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$this->error = new PEAR_Error($isConError[$_icServerID]);
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return false;
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}
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if ($this->debug)
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{
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error_log(__METHOD__ . array2string($euser));
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}
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if($_icServer->acc_sieve_enabled)
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{
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if ($_icServer->acc_sieve_host)
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{
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$sieveHost = $_icServer->acc_sieve_host;
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}
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else
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{
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$sieveHost = $_icServer->acc_imap_host;
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}
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//error_log(__METHOD__.__LINE__.'->'.$sieveHost);
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$sievePort = $_icServer->acc_sieve_port;
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$useTLS = false;
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switch($_icServer->acc_sieve_ssl & ~emailadmin_account::SSL_VERIFY)
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{
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case emailadmin_account::SSL_SSL:
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$sieveHost = 'ssl://'.$sieveHost;
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break;
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case emailadmin_account::SSL_TLS:
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$sieveHost = 'tls://'.$sieveHost;
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break;
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case emailadmin_account::SSL_STARTTLS:
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$useTLS = true;
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}
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// disable certificate validation, if not explicitly enabled (not possible in current UI, as not supported by Horde_Imap_Client)
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$options = array(
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'ssl' => array(
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'verify_peer' => (bool)($_icServer->acc_sieve_ssl & emailadmin_account::SSL_VERIFY),
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'verify_peer_name' => (bool)($_icServer->acc_sieve_ssl & emailadmin_account::SSL_VERIFY),
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),
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);
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if ($euser)
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{
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$username = $_icServer->acc_imap_admin_username;
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$password = $_icServer->acc_imap_admin_password;
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}
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else
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{
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$username = $_icServer->acc_imap_username;
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$password = $_icServer->acc_imap_password;
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}
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$this->icServer = $_icServer;
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}
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else
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{
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egw_cache::setCache(egw_cache::INSTANCE,'email','icServerSIEVE_connectionError'.trim($GLOBALS['egw_info']['user']['account_id']),$isConError,$expiration=60*15);
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return 'die';
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}
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$this->_timeout = 10; // socket::connect sets the/this timeout on connection
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$timeout = emailadmin_imap::getTimeOut('SIEVE');
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if ($timeout > $this->_timeout)
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{
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$this->_timeout = $timeout;
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}
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if(self::isError($this->error = $this->connect($sieveHost , $sievePort, $options, $useTLS) ) )
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{
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if ($this->debug)
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{
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error_log(__METHOD__ . ": error in connect($sieveHost,$sievePort, " . array2string($options) . ", $useTLS): " . $this->error->getMessage());
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}
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$isConError[$_icServerID] = $this->error->getMessage();
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egw_cache::setCache(egw_cache::INSTANCE,'email','icServerSIEVE_connectionError'.trim($GLOBALS['egw_info']['user']['account_id']),$isConError,$expiration=60*15);
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return false;
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}
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// we cache the supported AuthMethods during session, to be able to speed up login.
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if (is_null($sieveAuthMethods))
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{
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$sieveAuthMethods = & egw_cache::getSession('email', 'sieve_supportedAuthMethods');
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}
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if (isset($sieveAuthMethods[$_icServerID]))
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{
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$this->supportedAuthMethods = $sieveAuthMethods[$_icServerID];
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}
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if(self::isError($this->error = $this->login($username, $password, 'LOGIN', $euser) ) )
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{
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if ($this->debug)
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{
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error_log(__METHOD__ . ": error in login($username,$password,null,$euser): " . $this->error->getMessage());
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}
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$isConError[$_icServerID] = $this->error->getMessage();
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egw_cache::setCache(egw_cache::INSTANCE,'email','icServerSIEVE_connectionError'.trim($GLOBALS['egw_info']['user']['account_id']),$isConError,$expiration=60*15);
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return false;
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}
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// query active script from Sieve server
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if (empty($this->scriptName))
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{
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try {
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$this->scriptName = $this->getActive();
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}
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catch(Exception $e) {
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unset($e); // ignore NOTEXISTS exception
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}
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if (empty($this->scriptName))
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{
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$this->scriptName = self::DEFAULT_SCRIPT_NAME;
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}
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}
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//error_log(__METHOD__.__LINE__.array2string($this->_capability));
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return true;
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}
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/**
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* Handles connecting to the server and checks the response validity.
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* overwritten function from Net_Sieve to respect timeout
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*
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* @param string $host Hostname of server.
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* @param string $port Port of server.
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* @param array $options List of options to pass to
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* stream_context_create().
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* @param boolean $useTLS Use TLS if available.
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*
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* @return boolean True on success, PEAR_Error otherwise.
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*/
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function connect($host, $port, $options = null, $useTLS = true)
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{
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if ($this->debug)
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{
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error_log(__METHOD__ . __LINE__ . "$host, $port, " . array2string($options) . ", $useTLS");
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}
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$this->_data['host'] = $host;
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$this->_data['port'] = $port;
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$this->_useTLS = $useTLS;
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if (is_array($options)) {
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$this->_options = array_merge((array)$this->_options, $options);
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}
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if (NET_SIEVE_STATE_DISCONNECTED != $this->_state) {
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return PEAR::raiseError('Not currently in DISCONNECTED state', 1);
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}
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if (self::isError($res = $this->_sock->connect($host, $port, false, ($this->_timeout?$this->_timeout:10), $options))) {
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return $res;
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}
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if ($this->_bypassAuth) {
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$this->_state = NET_SIEVE_STATE_TRANSACTION;
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} else {
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$this->_state = NET_SIEVE_STATE_AUTHORISATION;
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if (self::isError($res = $this->_doCmd())) {
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return $res;
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}
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}
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// Explicitly ask for the capabilities in case the connection is
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// picked up from an existing connection.
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if (self::isError($res = $this->_cmdCapability())) {
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return PEAR::raiseError(
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'Failed to connect, server said: ' . $res->getMessage(), 2
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);
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}
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// Check if we can enable TLS via STARTTLS.
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if ($useTLS && !empty($this->_capability['starttls'])
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&& function_exists('stream_socket_enable_crypto')
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) {
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if (self::isError($res = $this->_startTLS())) {
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return $res;
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}
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}
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return true;
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}
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/**
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* Own _getBestAuthMethod as Net/Sieve.php assumes SASLMethods to be working
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* Returns the name of the best authentication method that the server
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* has advertised.
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*
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* @param string if !=null,check this one first if reported as serverMethod.
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* if so, return as bestauthmethod
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* @return mixed Returns a string containing the name of the best
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* supported authentication method or a PEAR_Error object
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* if a failure condition is encountered.
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*/
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function _getBestAuthMethod($userMethod = null)
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{
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//error_log(__METHOD__.__LINE__.'->'.$userMethod.'<->'.array2string($this->_capability['sasl']));
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if( isset($this->_capability['sasl']) ){
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$serverMethods=$this->_capability['sasl'];
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}else{
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// if the server don't send an sasl capability fallback to login auth
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//return 'LOGIN';
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return PEAR::raiseError("This server don't support any Auth methods SASL problem?");
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}
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$methods = array();
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if($userMethod != null ){
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$methods[] = $userMethod;
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foreach ( $this->supportedAuthMethods as $method ) {
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$methods[]=$method;
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}
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}else{
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$methods = $this->supportedAuthMethods;
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}
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if( ($methods != null) && ($serverMethods != null)){
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foreach ( $methods as $method ) {
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if ( in_array( $method , $serverMethods ) ) {
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return $method;
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}
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}
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$serverMethods=implode(',' , $serverMethods );
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$myMethods=implode(',' ,$this->supportedAuthMethods);
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return PEAR::raiseError("$method NOT supported authentication method!. This server " .
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"supports these methods= $serverMethods, but I support $myMethods");
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}else{
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return PEAR::raiseError("This server don't support any Auth methods");
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}
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}
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/**
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* Handles the authentication using any known method
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* overwritten function from Net_Sieve to support fallback
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*
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* @param string $uid The userid to authenticate as.
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* @param string $pwd The password to authenticate with.
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* @param string $userMethod The method to use ( if $userMethod == '' then the class chooses the best method (the stronger is the best ) )
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* @param string $euser The effective uid to authenticate as.
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*
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* @return mixed string or PEAR_Error
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*
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* @access private
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* @since 1.0
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*/
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function _cmdAuthenticate($uid , $pwd , $userMethod = null , $euser = '' )
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{
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if ( self::isError( $method = $this->_getBestAuthMethod($userMethod) ) ) {
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return $method;
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}
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//error_log(__METHOD__.__LINE__.' using AuthMethod: '.$method);
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switch ($method) {
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case 'DIGEST-MD5':
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$result = $this->_authDigestMD5( $uid , $pwd , $euser );
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if (!self::isError($result))
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{
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break;
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}
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$res = $this->_doCmd();
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unset($this->_error);
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$this->supportedAuthMethods = array_diff($this->supportedAuthMethods,array($method,'CRAM-MD5'));
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return $this->_cmdAuthenticate($uid , $pwd, null, $euser);
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case 'CRAM-MD5':
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$result = $this->_authCRAMMD5( $uid , $pwd, $euser);
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if (!self::isError($result))
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{
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break;
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}
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$res = $this->_doCmd();
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unset($this->_error);
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$this->supportedAuthMethods = array_diff($this->supportedAuthMethods,array($method,'DIGEST-MD5'));
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return $this->_cmdAuthenticate($uid , $pwd, null, $euser);
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case 'LOGIN':
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$result = $this->_authLOGIN( $uid , $pwd , $euser );
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if (!self::isError($result))
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{
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break;
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}
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$res = $this->_doCmd();
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unset($this->_error);
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$this->supportedAuthMethods = array_diff($this->supportedAuthMethods,array($method));
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return $this->_cmdAuthenticate($uid , $pwd, null, $euser);
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case 'PLAIN':
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$result = $this->_authPLAIN( $uid , $pwd , $euser );
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break;
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default :
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$result = new PEAR_Error( "$method is not a supported authentication method" );
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break;
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}
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if (self::isError($result))
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{
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return $result;
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}
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if (self::isError($res = $this->_doCmd())) {
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return $res;
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}
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// Query the server capabilities again now that we are authenticated.
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if (self::isError($res = $this->_cmdCapability())) {
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return PEAR::raiseError(
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'Failed to connect, server said: ' . $res->getMessage(), 2
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);
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}
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return $result;
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}
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/**
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* Send a command and retrieves a response from the server.
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*
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* @param string $cmd The command to send.
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* @param boolean $auth Whether this is an authentication command.
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*
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* @return string|PEAR_Error Reponse string if an OK response, PEAR_Error
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* if a NO response.
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*/
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function _doCmd($cmd = '', $auth = false)
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{
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$referralCount = 0;
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while ($referralCount < $this->_maxReferralCount) {
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if (strlen($cmd)) {
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$error = $this->_sendCmd($cmd);
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if (is_a($error, 'PEAR_Error')) {
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return $error;
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}
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}
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$response = '';
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while (true) {
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$line = $this->_recvLn();
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if (is_a($line, 'PEAR_Error')) {
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return $line;
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}
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if (preg_match('/^(OK|NO)/i', $line, $tag)) {
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// Check for string literal message.
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// ServerResponse may send {nm} (nm representing a number)
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// dbmail (in some versions) sends: {nm+} thus breaking RFC5804 rules (Section 4 Formal Syntax)
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// {nm+} may only be used in communicating from client TO server; (not Server to Client)
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// we work around this bug (allowing +) using a patch introduced with roundcube 2 years ago.
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//if (preg_match('/{([0-9]+)}$/', $line, $matches)) { //original
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if (preg_match('/{([0-9]+)\+?}$/', $line, $matches)) { //patched to cope with dbmail
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$line = substr($line, 0, -(strlen($matches[1]) + 2))
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. str_replace(
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"\r\n", ' ', $this->_recvBytes($matches[1] + 2)
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);
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}
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if ('OK' == $this->_toUpper($tag[1])) {
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$response .= $line;
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return rtrim($response);
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}
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return $this->_pear->raiseError(trim($response . substr($line, 2)), 3);
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}
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if (preg_match('/^BYE/i', $line)) {
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$error = $this->disconnect(false);
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if (is_a($error, 'PEAR_Error')) {
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return $this->_pear->raiseError(
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'Cannot handle BYE, the error was: '
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. $error->getMessage(),
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4
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);
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}
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// Check for referral, then follow it. Otherwise, carp an
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// error.
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if (preg_match('/^bye \(referral "(sieve:\/\/)?([^"]+)/i', $line, $matches)) {
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// Replace the old host with the referral host
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// preserving any protocol prefix.
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$this->_data['host'] = preg_replace(
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'/\w+(?!(\w|\:\/\/)).*/', $matches[2],
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$this->_data['host']
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);
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$error = $this->_handleConnectAndLogin();
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if (is_a($error, 'PEAR_Error')) {
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return $this->_pear->raiseError(
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'Cannot follow referral to '
|
|
. $this->_data['host'] . ', the error was: '
|
|
. $error->getMessage(),
|
|
5
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
return $this->_pear->raiseError(trim($response . $line), 6);
|
|
}
|
|
|
|
// ServerResponse may send {nm} (nm representing a number)
|
|
// dbmail (in some versions) sends: {nm+} thus breaking RFC5804 rules (Section 4 Formal Syntax)
|
|
// {nm+} may only be used in communicating from client TO server; (not Server to Client)
|
|
// we work around this bug (allowing +) using a patch introduced with roundcube 2 years ago.
|
|
// although roundcube suggested only the change in line
|
|
//if (preg_match('/^{([0-9]+)}/', $line, $matches)) { //original
|
|
if (preg_match('/^{([0-9]+)\+?}/', $line, $matches)) { //patched to cope with dbmail
|
|
// Matches literal string responses.
|
|
$line = $this->_recvBytes($matches[1] + 2);
|
|
if (!$auth) {
|
|
// Receive the pending OK only if we aren't
|
|
// authenticating since string responses during
|
|
// authentication don't need an OK.
|
|
$this->_recvLn();
|
|
}
|
|
return $line;
|
|
}
|
|
|
|
if ($auth) {
|
|
// String responses during authentication don't need an
|
|
// OK.
|
|
$response .= $line;
|
|
return rtrim($response);
|
|
}
|
|
|
|
$response .= $line . "\r\n";
|
|
$referralCount++;
|
|
}
|
|
}
|
|
|
|
return $this->_pear->raiseError('Max referral count (' . $referralCount . ') reached. Cyrus murder loop error?', 7);
|
|
}
|
|
|
|
function getRules()
|
|
{
|
|
if (!isset($this->rules)) $this->retrieveRules();
|
|
|
|
return $this->rules;
|
|
}
|
|
|
|
function getVacation()
|
|
{
|
|
if (!isset($this->rules)) $this->retrieveRules();
|
|
|
|
return $this->vacation;
|
|
}
|
|
|
|
function getEmailNotification()
|
|
{
|
|
if (!isset($this->rules)) $this->retrieveRules();
|
|
|
|
return $this->emailNotification;
|
|
}
|
|
|
|
/**
|
|
* Set email notifications
|
|
*
|
|
* @param array $_rules
|
|
* @param string $_scriptName
|
|
*/
|
|
function setRules(array $_rules, $_scriptName=null)
|
|
{
|
|
$script = $this->retrieveRules($_scriptName);
|
|
$script->debug = $this->debug;
|
|
$script->rules = $_rules;
|
|
$ret = $script->updateScript($this);
|
|
$this->error = $script->errstr;
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Set email notifications
|
|
*
|
|
* @param array $_vacation
|
|
* @param string $_scriptName
|
|
*/
|
|
function setVacation(array $_vacation, $_scriptName=null)
|
|
{
|
|
if ($this->debug)
|
|
{
|
|
error_log(__METHOD__ . "($_scriptName," . print_r($_vacation, true) . ')');
|
|
}
|
|
$script = $this->retrieveRules($_scriptName);
|
|
$script->debug = $this->debug;
|
|
$script->vacation = $_vacation;
|
|
$ret = $script->updateScript($this);
|
|
$this->error = $script->errstr;
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Set email notifications
|
|
*
|
|
* @param array $_emailNotification
|
|
* @param string $_scriptName
|
|
* @return emailadmin_script
|
|
*/
|
|
function setEmailNotification(array $_emailNotification, $_scriptName=null)
|
|
{
|
|
if ($_emailNotification['externalEmail'] == '' || !preg_match("/\@/",$_emailNotification['externalEmail'])) {
|
|
$_emailNotification['status'] = 'off';
|
|
$_emailNotification['externalEmail'] = '';
|
|
}
|
|
|
|
$script = $this->retrieveRules($_scriptName);
|
|
$script->emailNotification = $_emailNotification;
|
|
$ret = $script->updateScript($this);
|
|
$this->error = $script->errstr;
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Retrive rules, vacation, notifications and return emailadmin_script object to update them
|
|
*
|
|
* @param string $_scriptName
|
|
* @return emailadmin_script
|
|
*/
|
|
function retrieveRules($_scriptName=null)
|
|
{
|
|
if (!$_scriptName)
|
|
{
|
|
$_scriptName = $this->scriptName;
|
|
}
|
|
$script = new emailadmin_script($_scriptName);
|
|
|
|
try {
|
|
$script->retrieveRules($this);
|
|
}
|
|
catch (Exception $e) {
|
|
unset($e); // ignore not found script exception
|
|
}
|
|
$this->rules =& $script->rules;
|
|
$this->vacation =& $script->vacation;
|
|
$this->emailNotification =& $script->emailNotification; // Added email notifications
|
|
|
|
return $script;
|
|
}
|
|
|
|
/**
|
|
* Tell whether a value is a PEAR error.
|
|
*
|
|
* Implemented here to get arround: PHP Deprecated: Non-static method self::isError() should not be called statically
|
|
*
|
|
* @param mixed $data the value to test
|
|
* @param int $code if $data is an error object, return true
|
|
* only if $code is a string and
|
|
* $obj->getMessage() == $code or
|
|
* $code is an integer and $obj->getCode() == $code
|
|
* @access public
|
|
* @return bool true if parameter is an error
|
|
*/
|
|
protected static function isError($data, $code = null)
|
|
{
|
|
static $pear=null;
|
|
if (!isset($pear)) $pear = new PEAR();
|
|
|
|
return $pear->isError($data, $code);
|
|
}
|
|
}
|