397 lines
10 KiB
PHP
397 lines
10 KiB
PHP
<?php
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/**
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* PHPMailer POP-Before-SMTP Authentication Class.
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* PHP Version 5
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* @package PHPMailer
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* @link https://github.com/PHPMailer/PHPMailer/
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* @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
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* @author Jim Jagielski (jimjag) <jimjag@gmail.com>
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* @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
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* @author Brent R. Matzelle (original founder)
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* @copyright 2012 - 2014 Marcus Bointon
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* @copyright 2010 - 2012 Jim Jagielski
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* @copyright 2004 - 2009 Andy Prevost
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
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* @note This program is distributed in the hope that it will be useful - WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/**
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* PHPMailer POP-Before-SMTP Authentication Class.
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* Specifically for PHPMailer to use for RFC1939 POP-before-SMTP authentication.
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* Does not support APOP.
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* @package PHPMailer
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* @author Richard Davey (original author) <rich@corephp.co.uk>
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* @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
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* @author Jim Jagielski (jimjag) <jimjag@gmail.com>
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* @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
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*/
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class POP3
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{
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/**
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* The POP3 PHPMailer Version number.
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* @type string
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* @access public
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*/
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public $Version = '5.2.9';
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/**
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* Default POP3 port number.
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* @type integer
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* @access public
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*/
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public $POP3_PORT = 110;
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/**
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* Default timeout in seconds.
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* @type integer
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* @access public
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*/
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public $POP3_TIMEOUT = 30;
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/**
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* POP3 Carriage Return + Line Feed.
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* @type string
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* @access public
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* @deprecated Use the constant instead
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*/
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public $CRLF = "\r\n";
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/**
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* Debug display level.
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* Options: 0 = no, 1+ = yes
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* @type integer
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* @access public
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*/
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public $do_debug = 0;
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/**
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* POP3 mail server hostname.
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* @type string
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* @access public
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*/
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public $host;
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/**
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* POP3 port number.
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* @type integer
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* @access public
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*/
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public $port;
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/**
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* POP3 Timeout Value in seconds.
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* @type integer
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* @access public
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*/
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public $tval;
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/**
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* POP3 username
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* @type string
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* @access public
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*/
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public $username;
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/**
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* POP3 password.
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* @type string
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* @access public
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*/
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public $password;
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/**
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* Resource handle for the POP3 connection socket.
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* @type resource
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* @access private
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*/
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private $pop_conn;
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/**
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* Are we connected?
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* @type boolean
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* @access private
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*/
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private $connected = false;
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/**
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* Error container.
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* @type array
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* @access private
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*/
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private $errors = array();
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/**
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* Line break constant
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*/
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const CRLF = "\r\n";
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/**
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* Simple static wrapper for all-in-one POP before SMTP
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* @param $host
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* @param boolean $port
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* @param boolean $tval
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* @param string $username
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* @param string $password
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* @param integer $debug_level
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* @return boolean
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*/
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public static function popBeforeSmtp(
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$host,
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$port = false,
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$tval = false,
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$username = '',
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$password = '',
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$debug_level = 0
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) {
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$pop = new POP3;
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return $pop->authorise($host, $port, $tval, $username, $password, $debug_level);
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}
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/**
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* Authenticate with a POP3 server.
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* A connect, login, disconnect sequence
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* appropriate for POP-before SMTP authorisation.
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* @access public
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* @param string $host The hostname to connect to
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* @param integer|boolean $port The port number to connect to
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* @param integer|boolean $timeout The timeout value
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* @param string $username
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* @param string $password
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* @param integer $debug_level
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* @return boolean
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*/
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public function authorise($host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0)
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{
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$this->host = $host;
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// If no port value provided, use default
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if ($port === false) {
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$this->port = $this->POP3_PORT;
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} else {
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$this->port = (integer)$port;
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}
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// If no timeout value provided, use default
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if ($timeout === false) {
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$this->tval = $this->POP3_TIMEOUT;
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} else {
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$this->tval = (integer)$timeout;
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}
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$this->do_debug = $debug_level;
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$this->username = $username;
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$this->password = $password;
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// Reset the error log
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$this->errors = array();
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// connect
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$result = $this->connect($this->host, $this->port, $this->tval);
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if ($result) {
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$login_result = $this->login($this->username, $this->password);
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if ($login_result) {
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$this->disconnect();
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return true;
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}
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}
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// We need to disconnect regardless of whether the login succeeded
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$this->disconnect();
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return false;
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}
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/**
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* Connect to a POP3 server.
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* @access public
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* @param string $host
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* @param integer|boolean $port
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* @param integer $tval
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* @return boolean
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*/
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public function connect($host, $port = false, $tval = 30)
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{
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// Are we already connected?
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if ($this->connected) {
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return true;
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}
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//On Windows this will raise a PHP Warning error if the hostname doesn't exist.
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//Rather than suppress it with @fsockopen, capture it cleanly instead
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set_error_handler(array($this, 'catchWarning'));
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if ($port === false) {
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$port = $this->POP3_PORT;
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}
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// connect to the POP3 server
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$this->pop_conn = fsockopen(
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$host, // POP3 Host
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$port, // Port #
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$errno, // Error Number
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$errstr, // Error Message
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$tval
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); // Timeout (seconds)
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// Restore the error handler
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restore_error_handler();
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// Did we connect?
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if ($this->pop_conn === false) {
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// It would appear not...
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$this->setError(array(
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'error' => "Failed to connect to server $host on port $port",
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'errno' => $errno,
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'errstr' => $errstr
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));
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return false;
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}
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// Increase the stream time-out
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stream_set_timeout($this->pop_conn, $tval, 0);
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// Get the POP3 server response
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$pop3_response = $this->getResponse();
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// Check for the +OK
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if ($this->checkResponse($pop3_response)) {
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// The connection is established and the POP3 server is talking
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$this->connected = true;
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return true;
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}
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return false;
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}
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/**
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* Log in to the POP3 server.
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* Does not support APOP (RFC 2828, 4949).
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* @access public
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* @param string $username
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* @param string $password
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* @return boolean
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*/
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public function login($username = '', $password = '')
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{
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if (!$this->connected) {
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$this->setError('Not connected to POP3 server');
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}
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if (empty($username)) {
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$username = $this->username;
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}
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if (empty($password)) {
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$password = $this->password;
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}
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// Send the Username
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$this->sendString("USER $username" . self::CRLF);
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$pop3_response = $this->getResponse();
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if ($this->checkResponse($pop3_response)) {
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// Send the Password
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$this->sendString("PASS $password" . self::CRLF);
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$pop3_response = $this->getResponse();
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if ($this->checkResponse($pop3_response)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Disconnect from the POP3 server.
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* @access public
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*/
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public function disconnect()
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{
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$this->sendString('QUIT');
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//The QUIT command may cause the daemon to exit, which will kill our connection
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//So ignore errors here
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try {
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@fclose($this->pop_conn);
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} catch (Exception $e) {
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//Do nothing
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};
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}
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/**
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* Get a response from the POP3 server.
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* $size is the maximum number of bytes to retrieve
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* @param integer $size
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* @return string
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* @access private
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*/
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private function getResponse($size = 128)
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{
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$response = fgets($this->pop_conn, $size);
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if ($this->do_debug >= 1) {
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echo "Server -> Client: $response";
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}
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return $response;
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}
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/**
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* Send raw data to the POP3 server.
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* @param string $string
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* @return integer
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* @access private
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*/
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private function sendString($string)
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{
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if ($this->pop_conn) {
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if ($this->do_debug >= 2) { //Show client messages when debug >= 2
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echo "Client -> Server: $string";
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}
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return fwrite($this->pop_conn, $string, strlen($string));
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}
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return 0;
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}
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/**
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* Checks the POP3 server response.
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* Looks for for +OK or -ERR.
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* @param string $string
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* @return boolean
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* @access private
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*/
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private function checkResponse($string)
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{
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if (substr($string, 0, 3) !== '+OK') {
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$this->setError(array(
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'error' => "Server reported an error: $string",
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'errno' => 0,
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'errstr' => ''
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));
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return false;
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} else {
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return true;
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}
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}
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/**
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* Add an error to the internal error store.
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* Also display debug output if it's enabled.
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* @param $error
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*/
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private function setError($error)
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{
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$this->errors[] = $error;
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if ($this->do_debug >= 1) {
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echo '<pre>';
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foreach ($this->errors as $error) {
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print_r($error);
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}
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echo '</pre>';
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}
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}
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/**
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* POP3 connection error handler.
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* @param integer $errno
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* @param string $errstr
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* @param string $errfile
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* @param integer $errline
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* @access private
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*/
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private function catchWarning($errno, $errstr, $errfile, $errline)
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{
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$this->setError(array(
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'error' => "Connecting to the POP3 server raised a PHP warning: ",
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'errno' => $errno,
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'errstr' => $errstr,
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'errfile' => $errfile,
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'errline' => $errline
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));
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}
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}
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