<?php

/*~ class.smtp.php

.---------------------------------------------------------------------------.

|  Software: PHPMailer - PHP email class                                    |

|   Version: 5.2.1                                                          |

|      Site: https://code.google.com/a/apache-extras.org/p/phpmailer/       |

| ------------------------------------------------------------------------- |

|     Admin: Jim Jagielski (project admininistrator)                        |

|   Authors: Andy Prevost (codeworxtech) codeworxtech@users.sourceforge.net |

|          : Marcus Bointon (coolbru) coolbru@users.sourceforge.net         |

|          : Jim Jagielski (jimjag) jimjag@gmail.com                        |

|   Founder: Brent R. Matzelle (original founder)                           |

| Copyright (c) 2010-2012, Jim Jagielski. All Rights Reserved.              |

| Copyright (c) 2004-2009, Andy Prevost. All Rights Reserved.               |

| Copyright (c) 2001-2003, Brent R. Matzelle                                |

| ------------------------------------------------------------------------- |

|   License: Distributed under the Lesser General Public License (LGPL)     |

|            http://www.gnu.org/copyleft/lesser.html                        |

| 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.                                         |

'---------------------------------------------------------------------------'

*/

/**

 * PHPMailer - PHP SMTP email transport class

 * NOTE: Designed for use with PHP version 5 and up

 * @package PHPMailer

 * @author Andy Prevost

 * @author Marcus Bointon

 * @copyright 2004 - 2008 Andy Prevost

 * @author Jim Jagielski

 * @copyright 2010 - 2012 Jim Jagielski

 * @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)

 * @version $Id: class.smtp.php 450 2010-06-23 16:46:33Z coolbru $

 */

/**

 * SMTP is rfc 821 compliant and implements all the rfc 821 SMTP

 * commands except TURN which will always return a not implemented

 * error. SMTP also provides some utility methods for sending mail

 * to an SMTP server.

 * original author: Chris Ryan

 */

class SMTP {

  /**

   *  SMTP server port

   *  @var int

   */

  public $SMTP_PORT = 25;

  /**

   *  SMTP reply line ending

   *  @var string

   */

  public $CRLF = "\r\n";

  /**

   *  Sets whether debugging is turned on

   *  @var bool

   */

  public $do_debug;       // the level of debug to perform

  /**

   *  Sets VERP use on/off (default is off)

   *  @var bool

   */

  public $do_verp = false;

  /**

   * Sets the SMTP PHPMailer Version number

   * @var string

   */

  public $Version         = '5.2.1';

  /////////////////////////////////////////////////

  // PROPERTIES, PRIVATE AND PROTECTED

  /////////////////////////////////////////////////

  private $smtp_conn; // the socket to the server

  private $error;     // error if any on the last call

  private $helo_rply; // the reply the server sent to us for HELO

  /**

   * Initialize the class so that the data is in a known state.

   * @access public

   * @return void

   */

  public function __construct() {

    $this->smtp_conn = 0;

    $this->error = null;

    $this->helo_rply = null;

    $this->do_debug = 0;

  }

  /////////////////////////////////////////////////

  // CONNECTION FUNCTIONS

  /////////////////////////////////////////////////

  /**

   * Connect to the server specified on the port specified.

   * If the port is not specified use the default SMTP_PORT.

   * If tval is specified then a connection will try and be

   * established with the server for that number of seconds.

   * If tval is not specified the default is 30 seconds to

   * try on the connection.

   *

   * SMTP CODE SUCCESS: 220

   * SMTP CODE FAILURE: 421

   * @access public

   * @return bool

   */

  public function Connect($host, $port = 0, $tval = 30) {

    // set the error val to null so there is no confusion

    $this->error = null;

    // make sure we are __not__ connected

    if($this->connected()) {

      // already connected, generate error

      $this->error = array("error" => "Already connected to a server");

      return false;

    }

    if(empty($port)) {

      $port = $this->SMTP_PORT;

    }

    // connect to the smtp server

    $this->smtp_conn = @fsockopen($host,    // the host of the server

                                 $port,    // the port to use

                                 $errno,   // error number if any

                                 $errstr,  // error message if any

                                 $tval);   // give up after ? secs

    // verify we connected properly

    if(empty($this->smtp_conn)) {

      $this->error = array("error" => "Failed to connect to server",

                           "errno" => $errno,

                           "errstr" => $errstr);

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": $errstr ($errno)" . $this->CRLF . '<br />';

      }

      return false;

    }

    // SMTP server can take longer to respond, give longer timeout for first read

    // Windows does not have support for this timeout function

    if(substr(PHP_OS, 0, 3) != "WIN")

     socket_set_timeout($this->smtp_conn, $tval, 0);

    // get any announcement

    $announce = $this->get_lines();

    if($this->do_debug >= 2) {

      echo "SMTP -> FROM SERVER:" . $announce . $this->CRLF . '<br />';

    }

    return true;

  }

  /**

   * Initiate a TLS communication with the server.

   *

   * SMTP CODE 220 Ready to start TLS

   * SMTP CODE 501 Syntax error (no parameters allowed)

   * SMTP CODE 454 TLS not available due to temporary reason

   * @access public

   * @return bool success

   */

  public function StartTLS() {

    $this->error = null; # to avoid confusion

    if(!$this->connected()) {

      $this->error = array("error" => "Called StartTLS() without being connected");

      return false;

    }

    fputs($this->smtp_conn,"STARTTLS" . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {

      echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';

    }

    if($code != 220) {

      $this->error =

         array("error"     => "STARTTLS not accepted from server",

               "smtp_code" => $code,

               "smtp_msg"  => substr($rply,4));

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';

      }

      return false;

    }

    // Begin encrypted connection

    if(!stream_socket_enable_crypto($this->smtp_conn, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {

      return false;

    }

    return true;

  }

  /**

   * Performs SMTP authentication.  Must be run after running the

   * Hello() method.  Returns true if successfully authenticated.

   * @access public

   * @return bool

   */

  public function Authenticate($username, $password) {

    // Start authentication

    fputs($this->smtp_conn,"AUTH LOGIN" . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($code != 334) {

      $this->error =

        array("error" => "AUTH not accepted from server",

              "smtp_code" => $code,

              "smtp_msg" => substr($rply,4));

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';

      }

      return false;

    }

    // Send encoded username

    fputs($this->smtp_conn, base64_encode($username) . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($code != 334) {

      $this->error =

        array("error" => "Username not accepted from server",

              "smtp_code" => $code,

              "smtp_msg" => substr($rply,4));

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';

      }

      return false;

    }

    // Send encoded password

    fputs($this->smtp_conn, base64_encode($password) . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($code != 235) {

      $this->error =

        array("error" => "Password not accepted from server",

              "smtp_code" => $code,

              "smtp_msg" => substr($rply,4));

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';

      }

      return false;

    }

    return true;

  }

  /**

   * Returns true if connected to a server otherwise false

   * @access public

   * @return bool

   */

  public function Connected() {

    if(!empty($this->smtp_conn)) {

      $sock_status = socket_get_status($this->smtp_conn);

      if($sock_status["eof"]) {

        // the socket is valid but we are not connected

        if($this->do_debug >= 1) {

            echo "SMTP -> NOTICE:" . $this->CRLF . "EOF caught while checking if connected";

        }

        $this->Close();

        return false;

      }

      return true; // everything looks good

    }

    return false;

  }

  /**

   * Closes the socket and cleans up the state of the class.

   * It is not considered good to use this function without

   * first trying to use QUIT.

   * @access public

   * @return void

   */

  public function Close() {

    $this->error = null; // so there is no confusion

    $this->helo_rply = null;

    if(!empty($this->smtp_conn)) {

      // close the connection and cleanup

      fclose($this->smtp_conn);

      $this->smtp_conn = 0;

    }

  }

  /////////////////////////////////////////////////

  // SMTP COMMANDS

  /////////////////////////////////////////////////

  /**

   * Issues a data command and sends the msg_data to the server

   * finializing the mail transaction. $msg_data is the message

   * that is to be send with the headers. Each header needs to be

   * on a single line followed by a <CRLF> with the message headers

   * and the message body being seperated by and additional <CRLF>.

   *

   * Implements rfc 821: DATA <CRLF>

   *

   * SMTP CODE INTERMEDIATE: 354

   *     [data]

   *     <CRLF>.<CRLF>

   *     SMTP CODE SUCCESS: 250

   *     SMTP CODE FAILURE: 552,554,451,452

   * SMTP CODE FAILURE: 451,554

   * SMTP CODE ERROR  : 500,501,503,421

   * @access public

   * @return bool

   */

  public function Data($msg_data) {

    $this->error = null; // so no confusion is caused

    if(!$this->connected()) {

      $this->error = array(

              "error" => "Called Data() without being connected");

      return false;

    }

    fputs($this->smtp_conn,"DATA" . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {

      echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';

    }

    if($code != 354) {

      $this->error =

        array("error" => "DATA command not accepted from server",

              "smtp_code" => $code,

              "smtp_msg" => substr($rply,4));

      if($this->do_debug >= 1) {

        echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';

      }

      return false;

    }

    /* the server is ready to accept data!

     * according to rfc 821 we should not send more than 1000

     * including the CRLF

     * characters on a single line so we will break the data up

     * into lines by \r and/or \n then if needed we will break

     * each of those into smaller lines to fit within the limit.

     * in addition we will be looking for lines that start with

     * a period '.' and append and additional period '.' to that

     * line. NOTE: this does not count towards limit.

     */

    // normalize the line breaks so we know the explode works

    $msg_data = str_replace("\r\n","\n",$msg_data);

    $msg_data = str_replace("\r","\n",$msg_data);

    $lines = explode("\n",$msg_data);

    /* we need to find a good way to determine is headers are

     * in the msg_data or if it is a straight msg body

     * currently I am assuming rfc 822 definitions of msg headers

     * and if the first field of the first line (':' sperated)

     * does not contain a space then it _should_ be a header

     * and we can process all lines before a blank "" line as

     * headers.

     */

    $field = substr($lines[0],0,strpos($lines[0],":"));

    $in_headers = false;

    if(!empty($field) && !strstr($field," ")) {

      $in_headers = true;

    }

    $max_line_length = 998; // used below; set here for ease in change

    while(list(,$line) = @each($lines)) {

      $lines_out = null;

      if($line == "" && $in_headers) {

        $in_headers = false;

      }

      // ok we need to break this line up into several smaller lines

      while(strlen($line) > $max_line_length) {

        $pos = strrpos(substr($line,0,$max_line_length)," ");

        // Patch to fix DOS attack

        if(!$pos) {

          $pos = $max_line_length - 1;

          $lines_out[] = substr($line,0,$pos);

          $line = substr($line,$pos);

        } else {

          $lines_out[] = substr($line,0,$pos);

          $line = substr($line,$pos + 1);

        }

        /* if processing headers add a LWSP-char to the front of new line

         * rfc 822 on long msg headers

         */

        if($in_headers) {

          $line = "\t" . $line;

        }

      }

      $lines_out[] = $line;

      // send the lines to the server

      while(list(,$line_out) = @each($lines_out)) {