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Edit File : POP3.php \| Size : 12.06 KB
<?php /** * PHPMailer POP-Before-SMTP Authentication Class. * PHP Version 5.5. * * @see https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project * * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk> * @author Jim Jagielski (jimjag) <jimjag@gmail.com> * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net> * @author Brent R. Matzelle (original founder) * @copyright 2012 - 2020 Marcus Bointon * @copyright 2010 - 2012 Jim Jagielski * @copyright 2004 - 2009 Andy Prevost * @license https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html GNU Lesser General Public License * @note This program is distributed in the hope that it will be useful - WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. / namespace PHPMailer\PHPMailer; /* * PHPMailer POP-Before-SMTP Authentication Class. * Specifically for PHPMailer to use for RFC1939 POP-before-SMTP authentication. * 1) This class does not support APOP authentication. * 2) Opening and closing lots of POP3 connections can be quite slow. If you need * to send a batch of emails then just perform the authentication once at the start, * and then loop through your mail sending script. Providing this process doesn't * take longer than the verification period lasts on your POP3 server, you should be fine. * 3) This is really ancient technology; you should only need to use it to talk to very old systems. * 4) This POP3 class is deliberately lightweight and incomplete, implementing just * enough to do authentication. * If you want a more complete class there are other POP3 classes for PHP available. * * @author Richard Davey (original author) <rich@corephp.co.uk> * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk> * @author Jim Jagielski (jimjag) <jimjag@gmail.com> * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net> / class POP3 { /* * The POP3 PHPMailer Version number. * * @var string / const VERSION = '7.0.0'; /* * Default POP3 port number. * * @var int / const DEFAULT_PORT = 110; /* * Default timeout in seconds. * * @var int / const DEFAULT_TIMEOUT = 30; /* * POP3 class debug output mode. * Debug output level. * Options: * @see POP3::DEBUG_OFF: No output * @see POP3::DEBUG_SERVER: Server messages, connection/server errors * @see POP3::DEBUG_CLIENT: Client and Server messages, connection/server errors * * @var int / public $do_debug = self::DEBUG_OFF; /* * POP3 mail server hostname. * * @var string / public $host; /* * POP3 port number. * * @var int / public $port; /* * POP3 Timeout Value in seconds. * * @var int / public $tval; /* * POP3 username. * * @var string / public $username; /* * POP3 password. * * @var string / public $password; /* * Resource handle for the POP3 connection socket. * * @var resource / protected $pop_conn; /* * Are we connected? * * @var bool / protected $connected = false; /* * Error container. * * @var array / protected $errors = []; /* * Line break constant. / const LE = "\r\n"; /* * Debug level for no output. * * @var int / const DEBUG_OFF = 0; /* * Debug level to show server -> client messages * also shows clients connection errors or errors from server * * @var int / const DEBUG_SERVER = 1; /* * Debug level to show client -> server and server -> client messages. * * @var int / const DEBUG_CLIENT = 2; /* * Simple static wrapper for all-in-one POP before SMTP. * * @param string $host The hostname to connect to * @param int\|bool $port The port number to connect to * @param int\|bool $timeout The timeout value * @param string $username * @param string $password * @param int $debug_level * * @return bool / public static function popBeforeSmtp( $host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0 ) { $pop = new self(); return $pop->authorise($host, $port, $timeout, $username, $password, $debug_level); } /* * Authenticate with a POP3 server. * A connect, login, disconnect sequence * appropriate for POP-before SMTP authorisation. * * @param string $host The hostname to connect to * @param int\|bool $port The port number to connect to * @param int\|bool $timeout The timeout value * @param string $username * @param string $password * @param int $debug_level * * @return bool / public function authorise($host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0) { $this->host = $host; //If no port value provided, use default if (false === $port) { $this->port = static::DEFAULT_PORT; } else { $this->port = (int) $port; } //If no timeout value provided, use default if (false === $timeout) { $this->tval = static::DEFAULT_TIMEOUT; } else { $this->tval = (int) $timeout; } $this->do_debug = $debug_level; $this->username = $username; $this->password = $password; //Reset the error log $this->errors = []; //Connect $result = $this->connect($this->host, $this->port, $this->tval); if ($result) { $login_result = $this->login($this->username, $this->password); if ($login_result) { $this->disconnect(); return true; } } //We need to disconnect regardless of whether the login succeeded $this->disconnect(); return false; } /* * Connect to a POP3 server. * * @param string $host * @param int\|bool $port * @param int $tval * * @return bool / public function connect($host, $port = false, $tval = 30) { //Are we already connected? if ($this->connected) { return true; } //On Windows this will raise a PHP Warning error if the hostname doesn't exist. //Rather than suppress it with @fsockopen, capture it cleanly instead set_error_handler(function () { call_user_func_array([$this, 'catchWarning'], func_get_args()); }); if (false === $port) { $port = static::DEFAULT_PORT; } //Connect to the POP3 server $errno = 0; $errstr = ''; $this->pop_conn = fsockopen( $host, //POP3 Host $port, //Port # $errno, //Error Number $errstr, //Error Message $tval ); //Timeout (seconds) //Restore the error handler restore_error_handler(); //Did we connect? if (false === $this->pop_conn) { //It would appear not... $this->setError( "Failed to connect to server $host on port $port. errno: $errno; errstr: $errstr" ); return false; } //Increase the stream time-out stream_set_timeout($this->pop_conn, $tval, 0); //Get the POP3 server response $pop3_response = $this->getResponse(); //Check for the +OK if ($this->checkResponse($pop3_response)) { //The connection is established and the POP3 server is talking $this->connected = true; return true; } return false; } /* * Log in to the POP3 server. * Does not support APOP (RFC 2828, 4949). * * @param string $username * @param string $password * * @return bool / public function login($username = '', $password = '') { if (!$this->connected) { $this->setError('Not connected to POP3 server'); return false; } if (empty($username)) { $username = $this->username; } if (empty($password)) { $password = $this->password; } //Send the Username $this->sendString("USER $username" . static::LE); $pop3_response = $this->getResponse(); if ($this->checkResponse($pop3_response)) { //Send the Password $this->sendString("PASS $password" . static::LE); $pop3_response = $this->getResponse(); if ($this->checkResponse($pop3_response)) { return true; } } return false; } /* * Disconnect from the POP3 server. / public function disconnect() { // If could not connect at all, no need to disconnect if ($this->pop_conn === false) { return; } $this->sendString('QUIT' . static::LE); // RFC 1939 shows POP3 server sending a +OK response to the QUIT command. // Try to get it. Ignore any failures here. try { $this->getResponse(); } catch (Exception $e) { //Do nothing } //The QUIT command may cause the daemon to exit, which will kill our connection //So ignore errors here try { @fclose($this->pop_conn); } catch (Exception $e) { //Do nothing } // Clean up attributes. $this->connected = false; $this->pop_conn = false; } /* * Get a response from the POP3 server. * * @param int $size The maximum number of bytes to retrieve * * @return string / protected function getResponse($size = 128) { $response = fgets($this->pop_conn, $size); if ($this->do_debug >= self::DEBUG_SERVER) { echo 'Server -> Client: ', $response; } return $response; } /* * Send raw data to the POP3 server. * * @param string $string * * @return int / protected function sendString($string) { if ($this->pop_conn) { if ($this->do_debug >= self::DEBUG_CLIENT) { //Show client messages when debug >= 2 echo 'Client -> Server: ', $string; } return fwrite($this->pop_conn, $string, strlen($string)); } return 0; } /* * Checks the POP3 server response. * Looks for for +OK or -ERR. * * @param string $string * * @return bool / protected function checkResponse($string) { if (strpos($string, '+OK') !== 0) { $this->setError("Server reported an error: $string"); return false; } return true; } /* * Add an error to the internal error store. * Also display debug output if it's enabled. * * @param string $error / protected function setError($error) { $this->errors[] = $error; if ($this->do_debug >= self::DEBUG_SERVER) { echo '<pre>'; foreach ($this->errors as $e) { print_r($e); } echo '</pre>'; } } /* * Get an array of error messages, if any. * * @return array / public function getErrors() { return $this->errors; } /* * POP3 connection error handler. * * @param int $errno * @param string $errstr * @param string $errfile * @param int $errline */ protected function catchWarning($errno, $errstr, $errfile, $errline) { $this->setError( 'Connecting to the POP3 server raised a PHP warning:' . "errno: $errno errstr: $errstr; errfile: $errfile; errline: $errline" ); } } Back

Edit File : POP3.php | Size : 12.06 KB

<?php

/**
 * PHPMailer POP-Before-SMTP Authentication Class.
 * PHP Version 5.5.
 *
 * @see https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project
 *
 * @author    Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
 * @author    Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author    Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author    Brent R. Matzelle (original founder)
 * @copyright 2012 - 2020 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 * @license   https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html GNU Lesser General Public License
 * @note      This program is distributed in the hope that it will be useful - WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 */

namespace PHPMailer\PHPMailer;

/**
 * PHPMailer POP-Before-SMTP Authentication Class.
 * Specifically for PHPMailer to use for RFC1939 POP-before-SMTP authentication.
 * 1) This class does not support APOP authentication.
 * 2) Opening and closing lots of POP3 connections can be quite slow. If you need
 *   to send a batch of emails then just perform the authentication once at the start,
 *   and then loop through your mail sending script. Providing this process doesn't
 *   take longer than the verification period lasts on your POP3 server, you should be fine.
 * 3) This is really ancient technology; you should only need to use it to talk to very old systems.
 * 4) This POP3 class is deliberately lightweight and incomplete, implementing just
 *   enough to do authentication.
 *   If you want a more complete class there are other POP3 classes for PHP available.
 *
 * @author Richard Davey (original author) <rich@corephp.co.uk>
 * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 */
class POP3
{
    /**
     * The POP3 PHPMailer Version number.
     *
     * @var string
     */
    const VERSION = '7.0.0';

/**
     * Default POP3 port number.
     *
     * @var int
     */
    const DEFAULT_PORT = 110;

/**
     * Default timeout in seconds.
     *
     * @var int
     */
    const DEFAULT_TIMEOUT = 30;

/**
     * POP3 class debug output mode.
     * Debug output level.
     * Options:
     * @see POP3::DEBUG_OFF: No output
     * @see POP3::DEBUG_SERVER: Server messages, connection/server errors
     * @see POP3::DEBUG_CLIENT: Client and Server messages, connection/server errors
     *
     * @var int
     */
    public $do_debug = self::DEBUG_OFF;

/**
     * POP3 mail server hostname.
     *
     * @var string
     */
    public $host;

/**
     * POP3 port number.
     *
     * @var int
     */
    public $port;

/**
     * POP3 Timeout Value in seconds.
     *
     * @var int
     */
    public $tval;

/**
     * POP3 username.
     *
     * @var string
     */
    public $username;

/**
     * POP3 password.
     *
     * @var string
     */
    public $password;

/**
     * Resource handle for the POP3 connection socket.
     *
     * @var resource
     */
    protected $pop_conn;

/**
     * Are we connected?
     *
     * @var bool
     */
    protected $connected = false;

/**
     * Error container.
     *
     * @var array
     */
    protected $errors = [];

/**
     * Line break constant.
     */
    const LE = "\r\n";

/**
     * Debug level for no output.
     *
     * @var int
     */
    const DEBUG_OFF = 0;

/**
     * Debug level to show server -> client messages
     * also shows clients connection errors or errors from server
     *
     * @var int
     */
    const DEBUG_SERVER = 1;

/**
     * Debug level to show client -> server and server -> client messages.
     *
     * @var int
     */
    const DEBUG_CLIENT = 2;

/**
     * Simple static wrapper for all-in-one POP before SMTP.
     *
     * @param string   $host        The hostname to connect to
     * @param int|bool $port        The port number to connect to
     * @param int|bool $timeout     The timeout value
     * @param string   $username
     * @param string   $password
     * @param int      $debug_level
     *
     * @return bool
     */
    public static function popBeforeSmtp(
        $host,
        $port = false,
        $timeout = false,
        $username = '',
        $password = '',
        $debug_level = 0
    ) {
        $pop = new self();

return $pop->authorise($host, $port, $timeout, $username, $password, $debug_level);
    }

/**
     * Authenticate with a POP3 server.
     * A connect, login, disconnect sequence
     * appropriate for POP-before SMTP authorisation.
     *
     * @param string   $host        The hostname to connect to
     * @param int|bool $port        The port number to connect to
     * @param int|bool $timeout     The timeout value
     * @param string   $username
     * @param string   $password
     * @param int      $debug_level
     *
     * @return bool
     */
    public function authorise($host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0)
    {
        $this->host = $host;
        //If no port value provided, use default
        if (false === $port) {
            $this->port = static::DEFAULT_PORT;
        } else {
            $this->port = (int) $port;
        }
        //If no timeout value provided, use default
        if (false === $timeout) {
            $this->tval = static::DEFAULT_TIMEOUT;
        } else {
            $this->tval = (int) $timeout;
        }
        $this->do_debug = $debug_level;
        $this->username = $username;
        $this->password = $password;
        //Reset the error log
        $this->errors = [];
        //Connect
        $result = $this->connect($this->host, $this->port, $this->tval);
        if ($result) {
            $login_result = $this->login($this->username, $this->password);
            if ($login_result) {
                $this->disconnect();

return true;
            }
        }
        //We need to disconnect regardless of whether the login succeeded
        $this->disconnect();

return false;
    }

/**
     * Connect to a POP3 server.
     *
     * @param string   $host
     * @param int|bool $port
     * @param int      $tval
     *
     * @return bool
     */
    public function connect($host, $port = false, $tval = 30)
    {
        //Are we already connected?
        if ($this->connected) {
            return true;
        }

//On Windows this will raise a PHP Warning error if the hostname doesn't exist.
        //Rather than suppress it with @fsockopen, capture it cleanly instead
        set_error_handler(function () {
            call_user_func_array([$this, 'catchWarning'], func_get_args());
        });

if (false === $port) {
            $port = static::DEFAULT_PORT;
        }

//Connect to the POP3 server
        $errno = 0;
        $errstr = '';
        $this->pop_conn = fsockopen(
            $host, //POP3 Host
            $port, //Port #
            $errno, //Error Number
            $errstr, //Error Message
            $tval
        ); //Timeout (seconds)
        //Restore the error handler
        restore_error_handler();

//Did we connect?
        if (false === $this->pop_conn) {
            //It would appear not...
            $this->setError(
                "Failed to connect to server $host on port $port. errno: $errno; errstr: $errstr"
            );

return false;
        }

//Increase the stream time-out
        stream_set_timeout($this->pop_conn, $tval, 0);

//Get the POP3 server response
        $pop3_response = $this->getResponse();
        //Check for the +OK
        if ($this->checkResponse($pop3_response)) {
            //The connection is established and the POP3 server is talking
            $this->connected = true;

return true;
        }

return false;
    }

/**
     * Log in to the POP3 server.
     * Does not support APOP (RFC 2828, 4949).
     *
     * @param string $username
     * @param string $password
     *
     * @return bool
     */
    public function login($username = '', $password = '')
    {
        if (!$this->connected) {
            $this->setError('Not connected to POP3 server');
            return false;
        }
        if (empty($username)) {
            $username = $this->username;
        }
        if (empty($password)) {
            $password = $this->password;
        }

//Send the Username
        $this->sendString("USER $username" . static::LE);
        $pop3_response = $this->getResponse();
        if ($this->checkResponse($pop3_response)) {
            //Send the Password
            $this->sendString("PASS $password" . static::LE);
            $pop3_response = $this->getResponse();
            if ($this->checkResponse($pop3_response)) {
                return true;
            }
        }

return false;
    }

/**
     * Disconnect from the POP3 server.
     */
    public function disconnect()
    {
        // If could not connect at all, no need to disconnect
        if ($this->pop_conn === false) {
            return;
        }

$this->sendString('QUIT' . static::LE);

// RFC 1939 shows POP3 server sending a +OK response to the QUIT command.
        // Try to get it.  Ignore any failures here.
        try {
            $this->getResponse();
        } catch (Exception $e) {
            //Do nothing
        }

//The QUIT command may cause the daemon to exit, which will kill our connection
        //So ignore errors here
        try {
            @fclose($this->pop_conn);
        } catch (Exception $e) {
            //Do nothing
        }

// Clean up attributes.
        $this->connected = false;
        $this->pop_conn  = false;
    }

/**
     * Get a response from the POP3 server.
     *
     * @param int $size The maximum number of bytes to retrieve
     *
     * @return string
     */
    protected function getResponse($size = 128)
    {
        $response = fgets($this->pop_conn, $size);
        if ($this->do_debug >= self::DEBUG_SERVER) {
            echo 'Server -> Client: ', $response;
        }

return $response;
    }

/**
     * Send raw data to the POP3 server.
     *
     * @param string $string
     *
     * @return int
     */
    protected function sendString($string)
    {
        if ($this->pop_conn) {
            if ($this->do_debug >= self::DEBUG_CLIENT) { //Show client messages when debug >= 2
                echo 'Client -> Server: ', $string;
            }

return fwrite($this->pop_conn, $string, strlen($string));
        }

return 0;
    }

/**
     * Checks the POP3 server response.
     * Looks for for +OK or -ERR.
     *
     * @param string $string
     *
     * @return bool
     */
    protected function checkResponse($string)
    {
        if (strpos($string, '+OK') !== 0) {
            $this->setError("Server reported an error: $string");

return false;
        }

return true;
    }

/**
     * Add an error to the internal error store.
     * Also display debug output if it's enabled.
     *
     * @param string $error
     */
    protected function setError($error)
    {
        $this->errors[] = $error;
        if ($this->do_debug >= self::DEBUG_SERVER) {
            echo '<pre>';
            foreach ($this->errors as $e) {
                print_r($e);
            }
            echo '</pre>';
        }
    }

/**
     * Get an array of error messages, if any.
     *
     * @return array
     */
    public function getErrors()
    {
        return $this->errors;
    }

/**
     * POP3 connection error handler.
     *
     * @param int    $errno
     * @param string $errstr
     * @param string $errfile
     * @param int    $errline
     */
    protected function catchWarning($errno, $errstr, $errfile, $errline)
    {
        $this->setError(
            'Connecting to the POP3 server raised a PHP warning:' .
            "errno: $errno errstr: $errstr; errfile: $errfile; errline: $errline"
        );
    }
}

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