SkidSec WebShell

Server Address : 172.31.38.4

Web Server : Apache/2.4.58 (Ubuntu)

Uname : Linux ip-172-31-38-4 6.14.0-1017-aws #17~24.04.1-Ubuntu SMP Wed Nov 5 10:48:17 UTC 2025 x86_64

PHP Version : 7.4.33

<?php /** * PHPMailer POP-Before-SMTP Authentication Class. * PHP Version 5 * @package PHPMailer * @link https://github.com/PHPMailer/PHPMailer/ * @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 - 2014 Marcus Bointon * @copyright 2010 - 2012 Jim Jagielski * @copyright 2004 - 2009 Andy Prevost * @license http://www.gnu.org/copyleft/lesser.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. */ /** * PHPMailer POP-Before-SMTP Authentication Class. * Specifically for PHPMailer to use for RFC1939 POP-before-SMTP authentication. * Does not support APOP. * @package PHPMailer * @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 * @access public */ public $Version = '5.2.16'; /** * Default POP3 port number. * @var integer * @access public */ public $POP3_PORT = 110; /** * Default timeout in seconds. * @var integer * @access public */ public $POP3_TIMEOUT = 30; /** * POP3 Carriage Return + Line Feed. * @var string * @access public * @deprecated Use the constant instead */ public $CRLF = "\r\n"; /** * Debug display level. * Options: 0 = no, 1+ = yes * @var integer * @access public */ public $do_debug = 0; /** * POP3 mail server hostname. * @var string * @access public */ public $host; /** * POP3 port number. * @var integer * @access public */ public $port; /** * POP3 Timeout Value in seconds. * @var integer * @access public */ public $tval; /** * POP3 username * @var string * @access public */ public $username; /** * POP3 password. * @var string * @access public */ public $password; /** * Resource handle for the POP3 connection socket. * @var resource * @access protected */ protected $pop_conn; /** * Are we connected? * @var boolean * @access protected */ protected $connected = false; /** * Error container. * @var array * @access protected */ protected $errors = array(); /** * Line break constant */ const CRLF = "\r\n"; /** * Simple static wrapper for all-in-one POP before SMTP * @param $host * @param integer|boolean $port The port number to connect to * @param integer|boolean $timeout The timeout value * @param string $username * @param string $password * @param integer $debug_level * @return boolean */ public static function popBeforeSmtp( $host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0 ) { $pop = new POP3; 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. * @access public * @param string $host The hostname to connect to * @param integer|boolean $port The port number to connect to * @param integer|boolean $timeout The timeout value * @param string $username * @param string $password * @param integer $debug_level * @return boolean */ public function authorise($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 = $this->POP3_PORT; } else { $this->port = (integer)$port; } // If no timeout value provided, use default if (false === $timeout) { $this->tval = $this->POP3_TIMEOUT; } else { $this->tval = (integer)$timeout; } $this->do_debug = $debug_level; $this->username = $username; $this->password = $password; // Reset the error log $this->errors = array(); // 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. * @access public * @param string $host * @param integer|boolean $port * @param integer $tval * @return boolean */ public function connect($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(array($this, 'catchWarning')); if (false === $port) { $port = $this->POP3_PORT; } // connect to the POP3 server $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(array( 'error' => "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). * @access public * @param string $username * @param string $password * @return boolean */ public function login($username = '', $password = '') { if (!$this->connected) { $this->setError('Not connected to POP3 server'); } if (empty($username)) { $username = $this->username; } if (empty($password)) { $password = $this->password; } // Send the Username $this->sendString("USER $username" . self::CRLF); $pop3_response = $this->getResponse(); if ($this->checkResponse($pop3_response)) { // Send the Password $this->sendString("PASS $password" . self::CRLF); $pop3_response = $this->getResponse(); if ($this->checkResponse($pop3_response)) { return true; } } return false; } /** * Disconnect from the POP3 server. * @access public */ public function disconnect() { $this->sendString('QUIT'); //The QUIT command may cause the daemon to exit, which will kill our connection //So ignore errors here try { @fclose($this->pop_conn); } catch (Exception $e) { //Do nothing }; } /** * Get a response from the POP3 server. * $size is the maximum number of bytes to retrieve * @param integer $size * @return string * @access protected */ protected function getResponse($size = 128) { $response = fgets($this->pop_conn, $size); if ($this->do_debug >= 1) { echo "Server -> Client: $response"; } return $response; } /** * Send raw data to the POP3 server. * @param string $string * @return integer * @access protected */ protected function sendString($string) { if ($this->pop_conn) { if ($this->do_debug >= 2) { //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 $string * @return boolean * @access protected */ protected function checkResponse($string) { if (substr($string, 0, 3) !== '+OK') { $this->setError(array( 'error' => "Server reported an error: $string", 'errno' => 0, 'errstr' => '' )); return false; } else { return true; } } /** * Add an error to the internal error store. * Also display debug output if it's enabled. * @param $error * @access protected */ protected function setError($error) { $this->errors[] = $error; if ($this->do_debug >= 1) { echo '<pre>'; foreach ($this->errors as $error) { print_r($error); } echo '</pre>'; } } /** * Get an array of error messages, if any. * @return array */ public function getErrors() { return $this->errors; } /** * POP3 connection error handler. * @param integer $errno * @param string $errstr * @param string $errfile * @param integer $errline * @access protected */ protected function catchWarning($errno, $errstr, $errfile, $errline) { $this->setError(array( 'error' => "Connecting to the POP3 server raised a PHP warning: ", 'errno' => $errno, 'errstr' => $errstr, 'errfile' => $errfile, 'errline' => $errline )); } }