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egroupware_official/egw-pear/Net/Sieve.php

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Creating branches/Stylite-EPL-11.1
2011-07-01 12:37:47 +02:00
<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003, Richard Heyes |
// | Copyright (c) 2006, Anish Mistry |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@phpguru.org> |
// | Co-Author: Damian Fernandez Sosa <damlists@cnba.uba.ar> |
// | Co-Author: Anish Mistry <amistry@am-productions.biz> |
// +-----------------------------------------------------------------------+
require_once('Net/Socket.php');
/**
* TODO
*
* o supportsAuthMech()
*/
/**
* Disconnected state
* @const NET_SIEVE_STATE_DISCONNECTED
*/
define('NET_SIEVE_STATE_DISCONNECTED', 1, true);
/**
* Authorisation state
* @const NET_SIEVE_STATE_AUTHORISATION
*/
define('NET_SIEVE_STATE_AUTHORISATION', 2, true);
/**
* Transaction state
* @const NET_SIEVE_STATE_TRANSACTION
*/
define('NET_SIEVE_STATE_TRANSACTION', 3, true);
/**
* A class for talking to the timsieved server which
* comes with Cyrus IMAP.
*
* SIEVE: RFC3028 http://www.ietf.org/rfc/rfc3028.txt
* MANAGE-SIEVE: http://www.ietf.org/internet-drafts/draft-martin-managesieve-06.txt
*
* @author Richard Heyes <richard@php.net>
* @author Damian Fernandez Sosa <damlists@cnba.uba.ar>
* @author Anish Mistry <amistry@am-productions.biz>
* @access public
* @version 1.2.0
* @package Net_Sieve
*/
class Net_Sieve
{
/**
* The socket object
* @var object
*/
var $_sock;
/**
* Info about the connect
* @var array
*/
var $_data;
/**
* Current state of the connection
* @var integer
*/
var $_state;
/**
* Constructor error is any
* @var object
*/
var $_error;
/**
* To allow class debuging
* @var boolean
*/
var $_debug = false;
/**
* Allows picking up of an already established connection
* @var boolean
*/
var $_bypassAuth = false;
* email/sieve: improve connection handling (timeout)
2011-12-08 16:17:02 +01:00
/**
* The timeout for the connection to the SIEVE server.
* @var int
*/
var $_timeout = null;
Creating branches/Stylite-EPL-11.1
2011-07-01 12:37:47 +02:00
/**
* Whether to use TLS if available
* @var boolean
*/
var $_useTLS = true;
/**
* The auth methods this class support
* @var array
*/
var $supportedAuthMethods=array('DIGEST-MD5', 'CRAM-MD5', 'PLAIN' , 'LOGIN');
//if you have problems using DIGEST-MD5 authentication please comment the line above and uncomment the following line
//var $supportedAuthMethods=array( 'CRAM-MD5', 'PLAIN' , 'LOGIN');
//var $supportedAuthMethods=array( 'PLAIN' , 'LOGIN');
/**
* The auth methods this class support
* @var array
*/
var $supportedSASLAuthMethods=array('DIGEST-MD5', 'CRAM-MD5');
/**
* Handles posible referral loops
* @var array
*/
var $_maxReferralCount = 15;
/**
* Constructor
* Sets up the object, connects to the server and logs in. stores
* any generated error in $this->_error, which can be retrieved
* using the getError() method.
*
* @param string $user Login username
* @param string $pass Login password
* @param string $host Hostname of server
* @param string $port Port of server
* @param string $logintype Type of login to perform
* @param string $euser Effective User (if $user=admin, login as $euser)
* @param string $bypassAuth Skip the authentication phase. Useful if the socket
is already open.
* @param boolean $useTLS Use TLS if available
*/
function Net_Sieve($user = null , $pass = null , $host = 'localhost', $port = 2000, $logintype = '', $euser = '', $debug = false, $bypassAuth = false, $useTLS = true)
{
$this->_state = NET_SIEVE_STATE_DISCONNECTED;
$this->_data['user'] = $user;
$this->_data['pass'] = $pass;
$this->_data['host'] = $host;
$this->_data['port'] = $port;
$this->_data['logintype'] = $logintype;
$this->_data['euser'] = $euser;
$this->_sock = new Net_Socket();
$this->_debug = $debug;
$this->_bypassAuth = $bypassAuth;
$this->_useTLS = $useTLS;
/*
* Include the Auth_SASL package. If the package is not available,
* we disable the authentication methods that depend upon it.
*/
if ((@include_once 'Auth/SASL.php') === false) {
if($this->_debug){
echo "AUTH_SASL NOT PRESENT!\n";
}
foreach($this->supportedSASLAuthMethods as $SASLMethod){
$pos = array_search( $SASLMethod, $this->supportedAuthMethods );
if($this->_debug){
echo "DISABLING METHOD $SASLMethod\n";
}
unset($this->supportedAuthMethods[$pos]);
}
}
if( ($user != null) && ($pass != null) ){
$this->_error = $this->_handleConnectAndLogin();
}
}
/**
* Handles the errors the class can find
* on the server
*
* @access private
* @param mixed $msg Text error message or PEAR error object
* @param integer $code Numeric error code
* @return PEAR_Error
*/
function _raiseError($msg, $code)
{
include_once 'PEAR.php';
return PEAR::raiseError($msg, $code);
}
/**
* Handles connect and login.
* on the server
*
* @access private
* @return mixed Indexed array of scriptnames or PEAR_Error on failure
*/
function _handleConnectAndLogin()
{
if (PEAR::isError($res = $this->connect($this->_data['host'] , $this->_data['port'], $this->_useTLS ))) {
return $res;
}
if($this->_bypassAuth === false) {
if (PEAR::isError($res = $this->login($this->_data['user'], $this->_data['pass'], $this->_data['logintype'] , $this->_data['euser'] , $this->_bypassAuth) ) ) {
return $res;
}
}
return true;
}
/**
* Returns an indexed array of scripts currently
* on the server
*
* @return mixed Indexed array of scriptnames or PEAR_Error on failure
*/
function listScripts()
{
if (is_array($scripts = $this->_cmdListScripts())) {
$this->_active = $scripts[1];
return $scripts[0];
} else {
return $scripts;
}
}
/**
* Returns the active script
*
* @return mixed The active scriptname or PEAR_Error on failure
*/
function getActive()
{
if (!empty($this->_active)) {
return $this->_active;
} elseif (is_array($scripts = $this->_cmdListScripts())) {
$this->_active = $scripts[1];
return $scripts[1];
}
}
/**
* Sets the active script
*
* @param string $scriptname The name of the script to be set as active
* @return mixed true on success, PEAR_Error on failure
*/
function setActive($scriptname)
{
return $this->_cmdSetActive($scriptname);
}
/**
* Retrieves a script
*
* @param string $scriptname The name of the script to be retrieved
* @return mixed The script on success, PEAR_Error on failure
*/
function getScript($scriptname)
{
return $this->_cmdGetScript($scriptname);
}
/**
* Adds a script to the server
*
* @param string $scriptname Name of the script
* @param string $script The script
* @param boolean $makeactive Whether to make this the active script
* @return mixed true on success, PEAR_Error on failure
*/
function installScript($scriptname, $script, $makeactive = false)
{
if (PEAR::isError($res = $this->_cmdPutScript($scriptname, $script))) {
return $res;
} elseif ($makeactive) {
return $this->_cmdSetActive($scriptname);
} else {
return true;
}
}
/**
* Removes a script from the server
*
* @param string $scriptname Name of the script
* @return mixed True on success, PEAR_Error on failure
*/
function removeScript($scriptname)
{
return $this->_cmdDeleteScript($scriptname);
}
/**
* Returns any error that may have been generated in the
* constructor
*
* @return mixed False if no error, PEAR_Error otherwise
*/
function getError()
{
return PEAR::isError($this->_error) ? $this->_error : false;
}
/**
* Handles connecting to the server and checking the
* response is valid.
*
* @access private
* @param string $host Hostname of server
* @param string $port Port of server
* @param array $options List of options to pass to connect
* @param boolean $useTLS Use TLS if available
* @return mixed True on success, PEAR_Error otherwise
*/
function connect($host, $port, $options = null, $useTLS = true)
{
if (NET_SIEVE_STATE_DISCONNECTED != $this->_state) {
$msg='Not currently in DISCONNECTED state';
$code=1;
return $this->_raiseError($msg,$code);
}
* email/sieve: improve connection handling (timeout)
2011-12-08 16:17:02 +01:00
if (PEAR::isError($res = $this->_sock->connect($host, $port, false, ($this->_timeout?$this->_timeout:10), $options))) {
Creating branches/Stylite-EPL-11.1
2011-07-01 12:37:47 +02:00
return $res;
}
if($this->_bypassAuth === false) {
$this->_state = NET_SIEVE_STATE_AUTHORISATION;
if (PEAR::isError($res = $this->_doCmd())) {
return $res;
}
} else {
$this->_state = NET_SIEVE_STATE_TRANSACTION;
}
// Explicitly ask for the capabilities in case the connection
// is picked up from an existing connection.
if(PEAR::isError($res = $this->_cmdCapability() )) {
$msg='Failed to connect, server said: ' . $res->getMessage();
$code=2;
return $this->_raiseError($msg,$code);
}
// Get logon greeting/capability and parse
$this->_parseCapability($res);
if($useTLS === true) {
// check if we can enable TLS via STARTTLS
if(isset($this->_capability['starttls']) && function_exists('stream_socket_enable_crypto') === true) {
if (PEAR::isError($res = $this->_startTLS())) {
return $res;
}
}
}
return true;
}
/**
* Logs into server.
*
* @param string $user Login username
* @param string $pass Login password
* @param string $logintype Type of login method to use
* @param string $euser Effective UID (perform on behalf of $euser)
* @param boolean $bypassAuth Do not perform authentication
* @return mixed True on success, PEAR_Error otherwise
*/
function login($user, $pass, $logintype = null , $euser = '', $bypassAuth = false)
{
if (NET_SIEVE_STATE_AUTHORISATION != $this->_state) {
$msg='Not currently in AUTHORISATION state';
$code=1;
return $this->_raiseError($msg,$code);
}
if( $bypassAuth === false ){
if(PEAR::isError($res=$this->_cmdAuthenticate($user , $pass , $logintype, $euser ) ) ){
return $res;
}
}
$this->_state = NET_SIEVE_STATE_TRANSACTION;
return true;
}
/**
* Handles the authentication using any known method
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $userMethod The method to use ( if $userMethod == '' then the class chooses the best method (the stronger is the best ) )
* @param string $euser The effective uid to authenticate as.
*
* @return mixed string or PEAR_Error
*
* @access private
* @since 1.0
*/
function _cmdAuthenticate($uid , $pwd , $userMethod = null , $euser = '' )
{
if ( PEAR::isError( $method = $this->_getBestAuthMethod($userMethod) ) ) {
return $method;
}
switch ($method) {
case 'DIGEST-MD5':
$result = $this->_authDigest_MD5( $uid , $pwd , $euser );
return $result;
break;
case 'CRAM-MD5':
$result = $this->_authCRAM_MD5( $uid , $pwd, $euser);
break;
case 'LOGIN':
$result = $this->_authLOGIN( $uid , $pwd , $euser );
break;
case 'PLAIN':
$result = $this->_authPLAIN( $uid , $pwd , $euser );
break;
default :
$result = new PEAR_Error( "$method is not a supported authentication method" );
break;
}
if (PEAR::isError($res = $this->_doCmd() )) {
return $res;
}
return $result;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authPLAIN($user, $pass , $euser )
{
if ($euser != '') {
$cmd=sprintf('AUTHENTICATE "PLAIN" "%s"', base64_encode($euser . chr(0) . $user . chr(0) . $pass ) ) ;
} else {
$cmd=sprintf('AUTHENTICATE "PLAIN" "%s"', base64_encode( chr(0) . $user . chr(0) . $pass ) );
}
return $this->_sendCmd( $cmd ) ;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authLOGIN($user, $pass , $euser )
{
$this->_sendCmd('AUTHENTICATE "LOGIN"');
$this->_doCmd(sprintf('"%s"', base64_encode($user)));
$this->_doCmd(sprintf('"%s"', base64_encode($pass)));
}
/**
* Authenticates the user using the CRAM-MD5 method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authCRAM_MD5($uid, $pwd, $euser)
{
if ( PEAR::isError( $challenge = $this->_doCmd( 'AUTHENTICATE "CRAM-MD5"' ) ) ) {
fixing typo in error handling of authCRAM_MD5 and authDigest_MD5
2011-12-28 09:55:47 +01:00
$this->_error=$challenge ;
return $challenge ;
Creating branches/Stylite-EPL-11.1
2011-07-01 12:37:47 +02:00
}
$challenge=trim($challenge);
$challenge = base64_decode( trim($challenge) );
$cram = &Auth_SASL::factory('crammd5');
if ( PEAR::isError($resp=$cram->getResponse( $uid , $pwd , $challenge ) ) ) {
$this->_error=$resp;
return $resp;
}
$auth_str = base64_encode( $resp );
if ( PEAR::isError($error = $this->_sendStringResponse( $auth_str ) ) ) {
$this->_error=$error;
return $error;
}
}
/**
* Authenticates the user using the DIGEST-MD5 method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return array Returns an array containing the response
*
* @access private
* @since 1.0
*/
function _authDigest_MD5($uid, $pwd, $euser)
{
if ( PEAR::isError( $challenge = $this->_doCmd('AUTHENTICATE "DIGEST-MD5"') ) ) {
fixing typo in error handling of authCRAM_MD5 and authDigest_MD5
2011-12-28 09:55:47 +01:00
$this->_error=$challenge ;
return $challenge ;
Creating branches/Stylite-EPL-11.1
2011-07-01 12:37:47 +02:00
}
$challenge = base64_decode( $challenge );
$digest = &Auth_SASL::factory('digestmd5');
if(PEAR::isError($param=$digest->getResponse($uid, $pwd, $challenge, "localhost", "sieve" , $euser) )) {
return $param;
}
$auth_str = base64_encode($param);
if ( PEAR::isError($error = $this->_sendStringResponse( $auth_str ) ) ) {
$this->_error=$error;
return $error;
}
if ( PEAR::isError( $challenge = $this->_doCmd() ) ) {
$this->_error=$challenge ;
return $challenge ;
}
if( strtoupper(substr($challenge,0,2))== 'OK' ){
return true;
}
/**
* We don't use the protocol's third step because SIEVE doesn't allow
* subsequent authentication, so we just silently ignore it.
*/
if ( PEAR::isError($error = $this->_sendStringResponse( '' ) ) ) {
$this->_error=$error;
return $error;
}
if (PEAR::isError($res = $this->_doCmd() )) {
return $res;
}
}
/**
* Removes a script from the server
*
* @access private
* @param string $scriptname Name of the script to delete
* @return mixed True on success, PEAR_Error otherwise
*/
function _cmdDeleteScript($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in AUTHORISATION state';
$code=1;
return $this->_raiseError($msg,$code);
}
if (PEAR::isError($res = $this->_doCmd(sprintf('DELETESCRIPT "%s"', $scriptname) ) )) {
return $res;
}
return true;
}
/**
* Retrieves the contents of the named script
*
* @access private
* @param string $scriptname Name of the script to retrieve
* @return mixed The script if successful, PEAR_Error otherwise
*/
function _cmdGetScript($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in AUTHORISATION state';
$code=1;
return $this->_raiseError($msg,$code);
}
if (PEAR::isError($res = $this->_doCmd(sprintf('GETSCRIPT "%s"', $scriptname) ) ) ) {
return $res;
}
return preg_replace('/{[0-9]+}\r\n/', '', $res);
}
/**
* Sets the ACTIVE script, ie the one that gets run on new mail
* by the server
*
* @access private
* @param string $scriptname The name of the script to mark as active
* @return mixed True on success, PEAR_Error otherwise
*/
function _cmdSetActive($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in AUTHORISATION state';
$code=1;
return $this->_raiseError($msg,$code);
}
if (PEAR::isError($res = $this->_doCmd(sprintf('SETACTIVE "%s"', $scriptname) ) ) ) {
return $res;
}
$this->_activeScript = $scriptname;
return true;
}
/**
* Sends the LISTSCRIPTS command
*
* @access private
* @return mixed Two item array of scripts, and active script on success,
* PEAR_Error otherwise.
*/
function _cmdListScripts()
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in AUTHORISATION state';
$code=1;
return $this->_raiseError($msg,$code);
}
$scripts = array();
$activescript = null;
if (PEAR::isError($res = $this->_doCmd('LISTSCRIPTS'))) {
return $res;
}
$res = explode("\r\n", $res);
foreach ($res as $value) {
if (preg_match('/^"(.*)"( ACTIVE)?$/i', $value, $matches)) {
$scripts[] = $matches[1];
if (!empty($matches[2])) {
$activescript = $matches[1];
}
}
}
return array($scripts, $activescript);
}
/**
* Sends the PUTSCRIPT command to add a script to
* the server.
*
* @access private
* @param string $scriptname Name of the new script
* @param string $scriptdata The new script
* @return mixed True on success, PEAR_Error otherwise
*/
function _cmdPutScript($scriptname, $scriptdata)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in TRANSACTION state';
$code=1;
return $this->_raiseError($msg,$code);
}
$stringLength = $this->_getLineLength($scriptdata);
if (PEAR::isError($res = $this->_doCmd(sprintf("PUTSCRIPT \"%s\" {%d+}\r\n%s", $scriptname, $stringLength, $scriptdata) ))) {
return $res;
}
return true;
}
/**
* Sends the LOGOUT command and terminates the connection
*
* @access private
* @param boolean $sendLogoutCMD True to send LOGOUT command before disconnecting
* @return mixed True on success, PEAR_Error otherwise
*/
function _cmdLogout($sendLogoutCMD=true)
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=1;
return $this->_raiseError($msg,$code);
//return PEAR::raiseError('Not currently connected');
}
if($sendLogoutCMD){
if (PEAR::isError($res = $this->_doCmd('LOGOUT'))) {
return $res;
}
}
$this->_sock->disconnect();
$this->_state = NET_SIEVE_STATE_DISCONNECTED;
return true;
}
/**
* Sends the CAPABILITY command
*
* @access private
* @return mixed True on success, PEAR_Error otherwise
*/
function _cmdCapability()
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=1;
return $this->_raiseError($msg,$code);
}
if (PEAR::isError($res = $this->_doCmd('CAPABILITY'))) {
return $res;
}
$this->_parseCapability($res);
return true;
}
/**
* Checks if the server has space to store the script
* by the server
*
* @param string $scriptname The name of the script to mark as active
* @param integer $size The size of the script
* @return mixed True on success, PEAR_Error otherwise
*/
function haveSpace($scriptname,$size)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
$msg='Not currently in TRANSACTION state';
$code=1;
return $this->_raiseError($msg,$code);
}
if (PEAR::isError($res = $this->_doCmd(sprintf('HAVESPACE "%s" %d', $scriptname, $size) ) ) ) {
return $res;
}
return true;
}
/**
* Parses the response from the capability command. Stores
* the result in $this->_capability
*
* @access private
* @param string $data The response from the capability command
*/
function _parseCapability($data)
{
$data = preg_split('/\r?\n/', $data, -1, PREG_SPLIT_NO_EMPTY);
for ($i = 0; $i < count($data); $i++) {
if (preg_match('/^"([a-z]+)"( "(.*)")?$/i', $data[$i], $matches)) {
switch (strtolower($matches[1])) {
case 'implementation':
$this->_capability['implementation'] = $matches[3];
break;
case 'sasl':
$this->_capability['sasl'] = preg_split('/\s+/', $matches[3]);
break;
case 'sieve':
$this->_capability['extensions'] = preg_split('/\s+/', $matches[3]);
break;
case 'starttls':
$this->_capability['starttls'] = true;
break;
}
}
}
}
/**
* Sends a command to the server
*
* @access private
* @param string $cmd The command to send
*/
function _sendCmd($cmd)
{
$status = $this->_sock->getStatus();
if (PEAR::isError($status) || $status['eof']) {
return new PEAR_Error( 'Failed to write to socket: (connection lost!) ' );
}
if ( PEAR::isError( $error = $this->_sock->write( $cmd . "\r\n" ) ) ) {
return new PEAR_Error( 'Failed to write to socket: ' . $error->getMessage() );
}
if( $this->_debug ){
// C: means this data was sent by the client (this class)
echo "C:$cmd\n";
}
return true;
}
/**
* Sends a string response to the server
*
* @access private
* @param string $cmd The command to send
*/
function _sendStringResponse($str)
{
$response='{' . $this->_getLineLength($str) . "+}\r\n" . $str ;
return $this->_sendCmd($response);
}
function _recvLn()
{
$lastline='';
if (PEAR::isError( $lastline = $this->_sock->gets( 8192 ) ) ) {
return new PEAR_Error( 'Failed to write to socket: ' . $lastline->getMessage() );
}
$lastline=rtrim($lastline);
if($this->_debug){
// S: means this data was sent by the IMAP Server
echo "S:$lastline\n" ;
}
if( $lastline === '' ) {
return new PEAR_Error( 'Failed to receive from the socket' );
}
return $lastline;
}
/**
* Send a command and retrieves a response from the server.
*
*
* @access private
* @param string $cmd The command to send
* @return mixed Reponse string if an OK response, PEAR_Error if a NO response
*/
function _doCmd($cmd = '' )
{
$referralCount=0;
while($referralCount < $this->_maxReferralCount ){
if($cmd != '' ){
if(PEAR::isError($error = $this->_sendCmd($cmd) )) {
return $error;
}
}
$response = '';
while (true) {
if(PEAR::isError( $line=$this->_recvLn() )){
return $line;
}
if ('ok' === strtolower(substr($line, 0, 2))) {
$response .= $line;
return rtrim($response);
} elseif ('no' === strtolower(substr($line, 0, 2))) {
// Check for string literal error message
if (preg_match('/^no {([0-9]+)\+?}/i', $line, $matches)) {
$line .= str_replace("\r\n", ' ', $this->_sock->read($matches[1] + 2 ));
if($this->_debug){
echo "S:$line\n";
}
}
$msg=trim($response . substr($line, 2));
$code=3;
return $this->_raiseError($msg,$code);
} elseif ('bye' === strtolower(substr($line, 0, 3))) {
if(PEAR::isError($error = $this->disconnect(false) ) ){
$msg="Can't handle bye, The error was= " . $error->getMessage() ;
$code=4;
return $this->_raiseError($msg,$code);
}
//if (preg_match('/^bye \(referral "([^"]+)/i', $line, $matches)) {
if (preg_match('/^bye \(referral "(sieve:\/\/)?([^"]+)/i', $line, $matches)) {
// Check for referral, then follow it. Otherwise, carp an error.
// Replace the old host with the referral host preserving any protocol prefix
$this->_data['host'] = preg_replace('/\w+(?!(\w|\:\/\/)).*/',$matches[2],$this->_data['host']);
if (PEAR::isError($error = $this->_handleConnectAndLogin() ) ){
$msg="Can't follow referral to " . $this->_data['host'] . ", The error was= " . $error->getMessage() ;
$code=5;
return $this->_raiseError($msg,$code);
}
break;
// Retry the command
if(PEAR::isError($error = $this->_sendCmd($cmd) )) {
return $error;
}
continue;
}
$msg=trim($response . $line);
$code=6;
return $this->_raiseError($msg,$code);
} elseif (preg_match('/^{([0-9]+)\+?}/i', $line, $matches)) {
// Matches String Responses.
//$line = str_replace("\r\n", ' ', $this->_sock->read($matches[1] + 2 ));
$str_size = $matches[1] + 2;
$line = '';
$line_length = 0;
while ($line_length < $str_size) {
$line .= $this->_sock->read($str_size - $line_length);
$line_length = $this->_getLineLength($line);
}
if($this->_debug){
echo "S:$line\n";
}
// receive the pending OK
$this->_recvLn();
return $line;
}
$response .= $line . "\r\n";
$referralCount++;
}
}
$msg="Max referral count reached ($referralCount times) Cyrus murder loop error?";
$code=7;
return $this->_raiseError($msg,$code);
}
/**
* Sets the debug state
*
* @param boolean $debug
* @return void
*/
function setDebug($debug = true)
{
$this->_debug = $debug;
}
/**
* Disconnect from the Sieve server
*
* @param string $scriptname The name of the script to be set as active
* @return mixed true on success, PEAR_Error on failure
*/
function disconnect($sendLogoutCMD=true)
{
return $this->_cmdLogout($sendLogoutCMD);
}
/**
* Returns the name of the best authentication method that the server
* has advertised.
*
* @param string if !=null,authenticate with this method ($userMethod).
*
* @return mixed Returns a string containing the name of the best
* supported authentication method or a PEAR_Error object
* if a failure condition is encountered.
* @access private
* @since 1.0
*/
function _getBestAuthMethod($userMethod = null)
{
if( isset($this->_capability['sasl']) ){
$serverMethods=$this->_capability['sasl'];
}else{
// if the server don't send an sasl capability fallback to login auth
//return 'LOGIN';
return new PEAR_Error("This server don't support any Auth methods SASL problem?");
}
if($userMethod != null ){
$methods = array();
$methods[] = $userMethod;
}else{
$methods = $this->supportedAuthMethods;
}
if( ($methods != null) && ($serverMethods != null)){
foreach ( $methods as $method ) {
if ( in_array( $method , $serverMethods ) ) {
return $method;
}
}
$serverMethods=implode(',' , $serverMethods );
$myMethods=implode(',' ,$this->supportedAuthMethods);
return new PEAR_Error("$method NOT supported authentication method!. This server " .
"supports these methods= $serverMethods, but I support $myMethods");
}else{
return new PEAR_Error("This server don't support any Auth methods");
}
}
/**
* Return the list of extensions the server supports
*
* @return mixed array on success, PEAR_Error on failure
*/
function getExtensions()
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=7;
return $this->_raiseError($msg,$code);
}
return $this->_capability['extensions'];
}
/**
* Return true if tyhe server has that extension
*
* @param string the extension to compare
* @return mixed array on success, PEAR_Error on failure
*/
function hasExtension($extension)
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=7;
return $this->_raiseError($msg,$code);
}
if(is_array($this->_capability['extensions'] ) ){
foreach( $this->_capability['extensions'] as $ext){
if( trim( strtolower( $ext ) ) === trim( strtolower( $extension ) ) )
return true;
}
}
return false;
}
/**
* Return the list of auth methods the server supports
*
* @return mixed array on success, PEAR_Error on failure
*/
function getAuthMechs()
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=7;
return $this->_raiseError($msg,$code);
}
if(!isset($this->_capability['sasl']) ){
$this->_capability['sasl']=array();
}
return $this->_capability['sasl'];
}
/**
* Return true if the server has that extension
*
* @param string the extension to compare
* @return mixed array on success, PEAR_Error on failure
*/
function hasAuthMech($method)
{
if (NET_SIEVE_STATE_DISCONNECTED === $this->_state) {
$msg='Not currently connected';
$code=7;
return $this->_raiseError($msg,$code);
//return PEAR::raiseError('Not currently connected');
}
if(is_array($this->_capability['sasl'] ) ){
foreach( $this->_capability['sasl'] as $ext){
if( trim( strtolower( $ext ) ) === trim( strtolower( $method ) ) )
return true;
}
}
return false;
}
/**
* Return true if the TLS negotiation was successful
*
* @access private
* @return mixed true on success, PEAR_Error on failure
*/
function _startTLS()
{
if (PEAR::isError($res = $this->_doCmd("STARTTLS"))) {
return $res;
}
if(stream_socket_enable_crypto($this->_sock->fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT) == false) {
$msg='Failed to establish TLS connection';
$code=2;
return $this->_raiseError($msg,$code);
}
if($this->_debug === true) {
echo "STARTTLS Negotiation Successful\n";
}
// RFC says we need to query the server capabilities again
if(PEAR::isError($res = $this->_cmdCapability() )) {
$msg='Failed to connect, server said: ' . $res->getMessage();
$code=2;
return $this->_raiseError($msg,$code);
}
return true;
}
function _getLineLength($string) {
if (extension_loaded('mbstring') || @dl(PHP_SHLIB_PREFIX.'mbstring.'.PHP_SHLIB_SUFFIX)) {
return mb_strlen($string,'latin1');
} else {
return strlen($string);
}
}
}
?>
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