sieve.php

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<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003, Richard Heyes                                     |
// | 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     |
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// |                                                                       |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <[e-mail]>                           |
// | Co-Author: Damian Fernandez Sosa <[e-mail]>               |
// +-----------------------------------------------------------------------+

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. the HAVESPACE
* command which appears to be broken (Cyrus 2.0.16).
*
* @author  Richard Heyes <[e-mail]>
* @author  Damian Fernandez Sosa <[e-mail]>
* @access  public
* @version 0.9.1
* @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;


    /**
    * 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 commente the line above and discomment 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.
    *
    * @access public
    * @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 $euser)
    */
    function Net_Sieve($user = null , $pass  = null , $host = 'localhost', $port = 2000, $logintype = '', $euser = '', $debug = false)
    {
        $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  = $debug;
        /*
        * Include the Auth_SASL package.  If the package is not available,
        * we disable the authentication methods that depend upon it.
        */
        if ((@include_once 'Auth/SASL.php') === false) {
            if($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
    * @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'] ))) {
            return $res;
        }
        if (PEAR::isError($res = $this->login($this->_data['user'], $this->_data['pass'], $this->_data['logintype'] , $this->_data['euser'] ) ) ) {
            return $res;
        }
        return true;

    }




    /**
    * Returns an indexed array of scripts currently
    * on the server
    *
    * @access public
    * @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
    *
    * @access public
    * @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
    *
    * @access public
    * @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
    *
    * @access public
    * @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
    *
    * @access public
    * @param  string $scriptname Name of the script
    * @param  string $script     The script
    * @param  bool   $makeactive Whether to make this the active script
    * @return mixed              true on success, PEAR_Error on failure
    */
    function installScript($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
    *
    * @access public
    * @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
    *
    * @access public
    * @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 $port Port of server
    * @return mixed        True on success, PEAR_Error otherwise
    */
    function connect($host, $port)
    {
        if (NET_SIEVE_STATE_DISCONNECTED != $this->_state) {
            $msg='Not currently in DISCONNECTED state';
            $code=1;
            return $this->_raiseError($msg,$code);
        }

        if (PEAR::isError($res = $this->_sock->connect($host, $port, null, 5))) {
            return $res;
        }


        $this->_state = NET_SIEVE_STATE_AUTHORISATION;
        if (PEAR::isError($res = $this->_doCmd())) {
            return $res;
        }
        /*
        if(PEAR::isError($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);

        return true;
    }

    /**
    * Logs into server.
    *
    * @access public
    * @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 $bypassAuth    dont perform auth 
    * @return mixed                  True on success, PEAR_Error otherwise
    */
    function login($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;
            }
        }