<?php

/*~ class.smtp.php

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

|  Software: PHPMailer - PHP email class                                    |

|   Version: 5.2.4                                                          |

|      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)

 */

/**

 * PHP RFC821 SMTP client

 *

 * 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.

 * @author Chris Ryan

 * @package PHPMailer

 */

class SMTP {

  /**

   *  SMTP server port

   *  @var int

   */

  public $SMTP_PORT = 25;

  /**

   *  SMTP reply line ending (don't change)

   *  @var string

   */

  public $CRLF = "\r\n";

  /**

   *  Sets whether debugging is turned on

   *  @var bool

   */

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

  /**

   * Sets the function/method to use for debugging output.

   * Right now we only honor "echo" or "error_log"

   * @var string

   */

  public $Debugoutput     = "echo";

  /**

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

   *  @var bool

   */

  public $do_verp = false;

  /**

   * Sets the SMTP timeout value for reads, in seconds

   * @var int

   */

  public $Timeout         = 15;

  /**

   * Sets the SMTP timelimit value for reads, in seconds

   * @var int

   */

  public $Timelimit       = 30;

  /**

   * Sets the SMTP PHPMailer Version number

   * @var string

   */

  public $Version         = '5.2.4';

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

  // PROPERTIES, PRIVATE AND PROTECTED

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

  /**

   * @var resource The socket to the server

   */

  private $smtp_conn;

  /**

   * @var string Error message, if any, for the last call

   */

  private $error;

  /**

   * @var string The reply the server sent to us for HELO

   */

  private $helo_rply;

  /**

   * Outputs debugging info via user-defined method

   * @param string $str

   */

  private function edebug($str) {

    if ($this->Debugoutput == "error_log") {

        error_log($str);

    } else {

        echo $str;

    }

  }

  /**

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

   * @access public

   * @return SMTP

   */

  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

   * @param string $host

   * @param int $port

   * @param int $tval

   * @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) {

        $this->edebug("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") {

     $max = ini_get('max_execution_time');

     if ($max != 0 && $tval > $max) { // don't bother if unlimited

      @set_time_limit($tval);

     }

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

    }

    // get any announcement

    $announce = $this->get_lines();

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

      $this->edebug("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) {

      $this->edebug("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) {

        $this->edebug("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

   * @param string $username

   * @param string $password

   * @param string $authtype

   * @param string $realm

   * @param string $workstation

   * @return bool

   */

  public function Authenticate($username, $password, $authtype='LOGIN', $realm='', $workstation='') {

    if (empty($authtype)) {

      $authtype = 'LOGIN';

    }

    switch ($authtype) {

      case 'PLAIN':

        // Start authentication

        fputs($this->smtp_conn,"AUTH PLAIN" . $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) {

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

          }

          return false;

        }

        // Send encoded username and password

        fputs($this->smtp_conn, base64_encode("\0".$username."\0".$password) . $this->CRLF);

        $rply = $this->get_lines();

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

        if($code != 235) {

          $this->error =

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

                  "smtp_code" => $code,

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

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

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

          }

          return false;

        }

        break;

      case 'LOGIN':

        // 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) {

            $this->edebug("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) {

            $this->edebug("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) {

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

          }

          return false;

        }

        break;

      case 'NTLM':

        /*

         * ntlm_sasl_client.php

         ** Bundled with Permission

         **

         ** How to telnet in windows: http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx

         ** PROTOCOL Documentation http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication

         */

        require_once('ntlm_sasl_client.php');

        $temp = new stdClass();

        $ntlm_client = new ntlm_sasl_client_class;

        if(! $ntlm_client->Initialize($temp)){//let's test if every function its available

            $this->error = array("error" => $temp->error);

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

                $this->edebug("You need to enable some modules in your php.ini file: " . $this->error["error"] . $this->CRLF);

            }

            return false;

        }

        $msg1 = $ntlm_client->TypeMsg1($realm, $workstation);//msg1

        fputs($this->smtp_conn,"AUTH NTLM " . base64_encode($msg1) . $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) {

                $this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF);

            }

            return false;

        }

        $challange = substr($rply,3);//though 0 based, there is a white space after the 3 digit number....//msg2

        $challange = base64_decode($challange);

        $ntlm_res = $ntlm_client->NTLMResponse(substr($challange,24,8),$password);

        $msg3 = $ntlm_client->TypeMsg3($ntlm_res,$username,$realm,$workstation);//msg3

        // Send encoded username

        fputs($this->smtp_conn, base64_encode($msg3) . $this->CRLF);

        $rply = $this->get_lines();

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

        if($code != 235) {

            $this->error =

                array("error" => "Could not authenticate",

                      "smtp_code" => $code,

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

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

                $this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF);

            }

            return false;

        }

        break;

    }

    return true;

  }

  /**

   * Returns true if connected to a server otherwise false

   * @access public

   * @return bool

   */

  public function Connected() {

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