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<?php
/*~ class.smtp.php
.---------------------------------------------------------------------------.
| Software: PHPMailer - PHP email class |
| Version: 5.1 |
| Contact: via sourceforge.net support pages (also www.codeworxtech.com) |
| Info: http://phpmailer.sourceforge.net |
| Support: http://sourceforge.net/projects/phpmailer/ |
| ------------------------------------------------------------------------- |
| Admin: Andy Prevost (project admininistrator) |
| Authors: Andy Prevost (codeworxtech) codeworxtech@users.sourceforge.net |
| : Marcus Bointon (coolbru) coolbru@users.sourceforge.net |
| Founder: Brent R. Matzelle (original founder) |
| 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. |
| ------------------------------------------------------------------------- |
| We offer a number of paid services (www.codeworxtech.com): |
| - Web Hosting on highly optimized fast and secure servers |
| - Technology Consulting |
| - Oursourcing (highly qualified programmers and graphic designers) |
'---------------------------------------------------------------------------'
*/

/**
 * 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
 * @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)
 * @version $Id: class.smtp.php 444 2009-05-05 11:22:26Z 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;

/////////////////////////////////////////////////
  // 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 . ' ';
 }
 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 . ' ';
 }

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 . ' ';
 }

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 . ' ';
 }
 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 . ' ';
 }
 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 . ' ';
 }
 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 . ' ';
 }
 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 . ' ';
 }

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 . ' ';
 }
 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)) {
        if(strlen($line_out) > 0)
        {
          if(substr($line_out, 0, 1) == ".") {
            $line_out = "." . $line_out;
          }
        }
        fputs($this->smtp_conn,$line_out . $this->CRLF);
      }
    }

// message data has been sent
    fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . ' ';
 }

if($code != 250) {
 $this->error =
 array("error" => "DATA 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 . ' ';
 }
 return false;
 }
 return true;
 }

/**
 * Sends the HELO command to the smtp server.
 * This makes sure that we and the server are in
 * the same known state.
 *
 * Implements from rfc 821: HELO <SP> <domain> <CRLF>
 *
 * SMTP CODE SUCCESS: 250
 * SMTP CODE ERROR : 500, 501, 504, 421
 * @access public
 * @return bool
 */
 public function Hello($host = '') {
 $this->error = null; // so no confusion is caused

if(!$this->connected()) {
      $this->error = array(
            "error" => "Called Hello() without being connected");
      return false;
    }

// if hostname for HELO was not specified send default
    if(empty($host)) {
      // determine appropriate default to send to server
      $host = "localhost";
    }

// Send extended hello first (RFC 2821)
    if(!$this->SendHello("EHLO", $host)) {
      if(!$this->SendHello("HELO", $host)) {
        return false;
      }
    }

return true;
  }

/**
   * Sends a HELO/EHLO command.
   * @access private
   * @return bool
   */
  private function SendHello($hello, $host) {
    fputs($this->smtp_conn, $hello . " " . $host . $this->CRLF);

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER: " . $rply . $this->CRLF . ' ';
 }

if($code != 250) {
 $this->error =
 array("error" => $hello . " 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 . ' ';
 }
 return false;
 }

$this->helo_rply = $rply;

return true;
  }

/**
 * Starts a mail transaction from the email address specified in
 * $from. Returns true if successful or false otherwise. If True
 * the mail transaction is started and then one or more Recipient
 * commands may be called followed by a Data command.
 *
 * Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
 *
 * SMTP CODE SUCCESS: 250
 * SMTP CODE SUCCESS: 552,451,452
 * SMTP CODE SUCCESS: 500,501,421
 * @access public
 * @return bool
 */
 public function Mail($from) {
 $this->error = null; // so no confusion is caused

if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Mail() without being connected");
      return false;
    }

$useVerp = ($this->do_verp ? "XVERP" : "");
 fputs($this->smtp_conn,"MAIL FROM:<" . $from . ">" . $useVerp . $this->CRLF);

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . ' ';
 }

if($code != 250) {
 $this->error =
 array("error" => "MAIL 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 . ' ';
 }
 return false;
 }
 return true;
 }

/**
 * Sends the quit command to the server and then closes the socket
 * if there is no error or the $close_on_error argument is true.
 *
 * Implements from rfc 821: QUIT <CRLF>
 *
 * SMTP CODE SUCCESS: 221
 * SMTP CODE ERROR : 500
 * @access public
 * @return bool
 */
 public function Quit($close_on_error = true) {
 $this->error = null; // so there is no confusion

if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Quit() without being connected");
      return false;
    }

// send the quit command to the server
    fputs($this->smtp_conn,"quit" . $this->CRLF);

// get any good-bye messages
    $byemsg = $this->get_lines();

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $byemsg . $this->CRLF . ' ';
 }

$rval = true;
    $e = null;

$code = substr($byemsg,0,3);
 if($code != 221) {
 // use e as a tmp var cause Close will overwrite $this->error
 $e = array("error" => "SMTP server rejected quit command",
 "smtp_code" => $code,
 "smtp_rply" => substr($byemsg,4));
 $rval = false;
 if($this->do_debug >= 1) {
 echo "SMTP -> ERROR: " . $e["error"] . ": " . $byemsg . $this->CRLF . ' ';
 }
 }

if(empty($e) || $close_on_error) {
      $this->Close();
    }

return $rval;
  }

/**
 * Sends the command RCPT to the SMTP server with the TO: argument of $to.
 * Returns true if the recipient was accepted false if it was rejected.
 *
 * Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
 *
 * SMTP CODE SUCCESS: 250,251
 * SMTP CODE FAILURE: 550,551,552,553,450,451,452
 * SMTP CODE ERROR : 500,501,503,421
 * @access public
 * @return bool
 */
 public function Recipient($to) {
 $this->error = null; // so no confusion is caused

if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Recipient() without being connected");
      return false;
    }

fputs($this->smtp_conn,"RCPT TO:<" . $to . ">" . $this->CRLF);

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . ' ';
 }

if($code != 250 && $code != 251) {
 $this->error =
 array("error" => "RCPT 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 . ' ';
 }
 return false;
 }
 return true;
 }

/**
 * Sends the RSET command to abort and transaction that is
 * currently in progress. Returns true if successful false
 * otherwise.
 *
 * Implements rfc 821: RSET <CRLF>
 *
 * SMTP CODE SUCCESS: 250
 * SMTP CODE ERROR : 500,501,504,421
 * @access public
 * @return bool
 */
 public function Reset() {
 $this->error = null; // so no confusion is caused

if(!$this->connected()) {
      $this->error = array(
              "error" => "Called Reset() without being connected");
      return false;
    }

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

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . ' ';
 }

if($code != 250) {
 $this->error =
 array("error" => "RSET failed",
 "smtp_code" => $code,
 "smtp_msg" => substr($rply,4));
 if($this->do_debug >= 1) {
 echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . ' ';
 }
 return false;
 }

return true;
  }

/**
 * Starts a mail transaction from the email address specified in
 * $from. Returns true if successful or false otherwise. If True
 * the mail transaction is started and then one or more Recipient
 * commands may be called followed by a Data command. This command
 * will send the message to the users terminal if they are logged
 * in and send them an email.
 *
 * Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
 *
 * SMTP CODE SUCCESS: 250
 * SMTP CODE SUCCESS: 552,451,452
 * SMTP CODE SUCCESS: 500,501,502,421
 * @access public
 * @return bool
 */
 public function SendAndMail($from) {
 $this->error = null; // so no confusion is caused

if(!$this->connected()) {
      $this->error = array(
          "error" => "Called SendAndMail() without being connected");
      return false;
    }

fputs($this->smtp_conn,"SAML FROM:" . $from . $this->CRLF);

$rply = $this->get_lines();
    $code = substr($rply,0,3);

if($this->do_debug >= 2) {
 echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . ' ';
 }

if($code != 250) {
 $this->error =
 array("error" => "SAML 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 . ' ';
 }
 return false;
 }
 return true;
 }

/**
 * This is an optional command for SMTP that this class does not
 * support. This method is here to make the RFC821 Definition
 * complete for this class and __may__ be implimented in the future
 *
 * Implements from rfc 821: TURN <CRLF>
 *
 * SMTP CODE SUCCESS: 250
 * SMTP CODE FAILURE: 502
 * SMTP CODE ERROR : 500, 503
 * @access public
 * @return bool
 */
 public function Turn() {
 $this->error = array("error" => "This method, TURN, of the SMTP ".
 "is not implemented");
 if($this->do_debug >= 1) {
 echo "SMTP -> NOTICE: " . $this->error["error"] . $this->CRLF . ' ';
 }
 return false;
 }

/**
  * Get the current error
  * @access public
  * @return array
  */
  public function getError() {
    return $this->error;
  }

/////////////////////////////////////////////////
  // INTERNAL FUNCTIONS
  /////////////////////////////////////////////////

/**
 * Read in as many lines as possible
 * either before eof or socket timeout occurs on the operation.
 * With SMTP we can tell if we have more lines to read if the
 * 4th character is '-' symbol. If it is a space then we don't
 * need to read anything else.
 * @access private
 * @return string
 */
 private function get_lines() {
 $data = "";
 while($str = @fgets($this->smtp_conn,515)) {
 if($this->do_debug >= 4) {
 echo "SMTP -> get_lines(): \$data was \"$data\"" . $this->CRLF . ' ';
 echo "SMTP -> get_lines(): \$str is \"$str\"" . $this->CRLF . ' ';
 }
 $data .= $str;
 if($this->do_debug >= 4) {
 echo "SMTP -> get_lines(): \$data is \"$data\"" . $this->CRLF . ' ';
 }
 // if 4th character is a space, we are done reading, break the loop
 if(substr($str,3,1) == " ") { break; }
 }
 return $data;
 }

}

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