<?php
/**
* ExchAuth class
* @version 07-23-2005
* @Author Bogdan Baliuc <b.baliuc@rogers.com>
* @package ExchAuth
*
* Copyright (C) 2005 - 2007 MailZu
* License: GPL, see LICENSE
*/
/**
* Base directory of application
*/
@define('BASE_DIR', dirname(__FILE__) . '/..');
/**
* CmnFns class
*/
include_once('lib/CmnFns.class.php');

/**
* Provide all database access/manipulation functionality for Exchange Auth
*/
class ExchAuth {
	// The exchange hostname with port (hostname[:port])
        var $exchHost;
        // The exchange LDAP URI (ldap://hostname[:port])
        var $exchLDAP;
        // The user's logon name
        var $logonName;
        // The user's first name
        var $firstName;
        // The user's mail address(es)
        var $emailAddress;

	var $err_msg = '';

	/**
	* Constructor to initialize object
	* @param none
	*/
	function ExchAuth() {
		global $conf;

		$this->exchHost = $conf['auth']['exch_host'];
		$this->exchLDAP = $conf['auth']['exch_ldap'];
	}

	// User methods -------------------------------------------

	/**
	* Authenticates user
	* @param string $username
	* @param string $password
	* @param string $domain
	* @return boolean
	*/
	function authUser($username, $password, $domain) {
		$fulluser = $domain.'/'.$username;
		$mbox = imap_open('{'.$this->exchHost.'/imap}Inbox', $fulluser, $password);
		if ($mbox === false) {
		        $this->err_msg = translate('Invalid Username/Password');
			return false;
		} else {
			$ignore = imap_errors();
			imap_close($mbox);
		}
    		$ldapconn = ldap_connect($this->exchLDAP);
                if ($ldapconn === false) {
                	$this->err_msg = translate('Can not connect to LDAP server');
                	return false;
                }
              	ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
                ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0);
                $ldapbind = ldap_bind($ldapconn);
                if ($ldapbind === false) {
                        $this->err_msg = translate('Can not bind to LDAP server');
                        return false;
                }
                $ldapattr = array('cn', 'rfc822Mailbox' ,'otherMailbox');
                $read = ldap_search($ldapconn, '', '(uid='.$username.')', $ldapattr);
                if ($read === false) {
                	$this->err_msg = translate('Unable to search LDAP server');
                	return false;
                }
                $info = ldap_get_entries($ldapconn, $read);
                $this->logonName = strtolower($username);
                $this->firstName = $info[0]['cn'][0];
                $this->emailAddress[] = strtolower($info[0]['rfc822mailbox'][0]);
                for ($i=0; $i<$info[0]['othermailbox']['count']; $i++) {
                	$data = $info[0]['othermailbox'][$i];
                	if (strncasecmp($data, 'smtp$', 5) == 0) {
                		$this->emailAddress[] = strtolower(substr($data, 5));
                	}
                }
		ldap_close($ldapconn);
		return true;
	}

	/**
	* Returns the last error message
	* @param none
	* @return last error message generated
	*/
	function get_err() {
		return $this->err_msg;
	}

	// Helper methods -------------------------------------------

    	/**
        * Returns user information
        * @return array containing user information
        */
	function getUserData() {
        	$return = array(
            			'logonName' => $this->logonName,
            			'firstName' => $this->firstName,
            			'emailAddress' => $this->emailAddress
        	);
        	return $return;
    	}
}
?>