From 8df3db566a3a937b45ebf11adb90d265e6f5e2d4 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sun, 17 Nov 2019 20:45:02 +0100
Subject: initial checking of customized version 1.0rc9

---
 .../classes/Swift/Plugins/PopBeforeSmtpPlugin.php  | 273 +++++++++++++++++++++
 1 file changed, 273 insertions(+)
 create mode 100644 vendor/swiftmailer/swiftmailer/lib/classes/Swift/Plugins/PopBeforeSmtpPlugin.php

(limited to 'vendor/swiftmailer/swiftmailer/lib/classes/Swift/Plugins/PopBeforeSmtpPlugin.php')

diff --git a/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Plugins/PopBeforeSmtpPlugin.php b/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Plugins/PopBeforeSmtpPlugin.php
new file mode 100644
index 0000000..3146152
--- /dev/null
+++ b/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Plugins/PopBeforeSmtpPlugin.php
@@ -0,0 +1,273 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Makes sure a connection to a POP3 host has been established prior to connecting to SMTP.
+ *
+ * @author Chris Corbyn
+ */
+class Swift_Plugins_PopBeforeSmtpPlugin implements Swift_Events_TransportChangeListener, Swift_Plugins_Pop_Pop3Connection
+{
+    /** A delegate connection to use (mostly a test hook) */
+    private $_connection;
+
+    /** Hostname of the POP3 server */
+    private $_host;
+
+    /** Port number to connect on */
+    private $_port;
+
+    /** Encryption type to use (if any) */
+    private $_crypto;
+
+    /** Username to use (if any) */
+    private $_username;
+
+    /** Password to use (if any) */
+    private $_password;
+
+    /** Established connection via TCP socket */
+    private $_socket;
+
+    /** Connect timeout in seconds */
+    private $_timeout = 10;
+
+    /** SMTP Transport to bind to */
+    private $_transport;
+
+    /**
+     * Create a new PopBeforeSmtpPlugin for $host and $port.
+     *
+     * @param string $host
+     * @param int    $port
+     * @param string $crypto as "tls" or "ssl"
+     */
+    public function __construct($host, $port = 110, $crypto = null)
+    {
+        $this->_host = $host;
+        $this->_port = $port;
+        $this->_crypto = $crypto;
+    }
+
+    /**
+     * Create a new PopBeforeSmtpPlugin for $host and $port.
+     *
+     * @param string $host
+     * @param int    $port
+     * @param string $crypto as "tls" or "ssl"
+     *
+     * @return self
+     */
+    public static function newInstance($host, $port = 110, $crypto = null)
+    {
+        return new self($host, $port, $crypto);
+    }
+
+    /**
+     * Set a Pop3Connection to delegate to instead of connecting directly.
+     *
+     * @param Swift_Plugins_Pop_Pop3Connection $connection
+     *
+     * @return $this
+     */
+    public function setConnection(Swift_Plugins_Pop_Pop3Connection $connection)
+    {
+        $this->_connection = $connection;
+
+        return $this;
+    }
+
+    /**
+     * Bind this plugin to a specific SMTP transport instance.
+     *
+     * @param Swift_Transport
+     */
+    public function bindSmtp(Swift_Transport $smtp)
+    {
+        $this->_transport = $smtp;
+    }
+
+    /**
+     * Set the connection timeout in seconds (default 10).
+     *
+     * @param int $timeout
+     *
+     * @return $this
+     */
+    public function setTimeout($timeout)
+    {
+        $this->_timeout = (int) $timeout;
+
+        return $this;
+    }
+
+    /**
+     * Set the username to use when connecting (if needed).
+     *
+     * @param string $username
+     *
+     * @return $this
+     */
+    public function setUsername($username)
+    {
+        $this->_username = $username;
+
+        return $this;
+    }
+
+    /**
+     * Set the password to use when connecting (if needed).
+     *
+     * @param string $password
+     *
+     * @return $this
+     */
+    public function setPassword($password)
+    {
+        $this->_password = $password;
+
+        return $this;
+    }
+
+    /**
+     * Connect to the POP3 host and authenticate.
+     *
+     * @throws Swift_Plugins_Pop_Pop3Exception if connection fails
+     */
+    public function connect()
+    {
+        if (isset($this->_connection)) {
+            $this->_connection->connect();
+        } else {
+            if (!isset($this->_socket)) {
+                if (!$socket = fsockopen(
+                    $this->_getHostString(), $this->_port, $errno, $errstr, $this->_timeout)) {
+                    throw new Swift_Plugins_Pop_Pop3Exception(
+                        sprintf('Failed to connect to POP3 host [%s]: %s', $this->_host, $errstr)
+                    );
+                }
+                $this->_socket = $socket;
+
+                if (false === $greeting = fgets($this->_socket)) {
+                    throw new Swift_Plugins_Pop_Pop3Exception(
+                        sprintf('Failed to connect to POP3 host [%s]', trim($greeting))
+                    );
+                }
+
+                $this->_assertOk($greeting);
+
+                if ($this->_username) {
+                    $this->_command(sprintf("USER %s\r\n", $this->_username));
+                    $this->_command(sprintf("PASS %s\r\n", $this->_password));
+                }
+            }
+        }
+    }
+
+    /**
+     * Disconnect from the POP3 host.
+     */
+    public function disconnect()
+    {
+        if (isset($this->_connection)) {
+            $this->_connection->disconnect();
+        } else {
+            $this->_command("QUIT\r\n");
+            if (!fclose($this->_socket)) {
+                throw new Swift_Plugins_Pop_Pop3Exception(
+                    sprintf('POP3 host [%s] connection could not be stopped', $this->_host)
+                );
+            }
+            $this->_socket = null;
+        }
+    }
+
+    /**
+     * Invoked just before a Transport is started.
+     *
+     * @param Swift_Events_TransportChangeEvent $evt
+     */
+    public function beforeTransportStarted(Swift_Events_TransportChangeEvent $evt)
+    {
+        if (isset($this->_transport)) {
+            if ($this->_transport !== $evt->getTransport()) {
+                return;
+            }
+        }
+
+        $this->connect();
+        $this->disconnect();
+    }
+
+    /**
+     * Not used.
+     */
+    public function transportStarted(Swift_Events_TransportChangeEvent $evt)
+    {
+    }
+
+    /**
+     * Not used.
+     */
+    public function beforeTransportStopped(Swift_Events_TransportChangeEvent $evt)
+    {
+    }
+
+    /**
+     * Not used.
+     */
+    public function transportStopped(Swift_Events_TransportChangeEvent $evt)
+    {
+    }
+
+    private function _command($command)
+    {
+        if (!fwrite($this->_socket, $command)) {
+            throw new Swift_Plugins_Pop_Pop3Exception(
+                sprintf('Failed to write command [%s] to POP3 host', trim($command))
+            );
+        }
+
+        if (false === $response = fgets($this->_socket)) {
+            throw new Swift_Plugins_Pop_Pop3Exception(
+                sprintf('Failed to read from POP3 host after command [%s]', trim($command))
+            );
+        }
+
+        $this->_assertOk($response);
+
+        return $response;
+    }
+
+    private function _assertOk($response)
+    {
+        if (substr($response, 0, 3) != '+OK') {
+            throw new Swift_Plugins_Pop_Pop3Exception(
+                sprintf('POP3 command failed [%s]', trim($response))
+            );
+        }
+    }
+
+    private function _getHostString()
+    {
+        $host = $this->_host;
+        switch (strtolower($this->_crypto)) {
+            case 'ssl':
+                $host = 'ssl://'.$host;
+                break;
+
+            case 'tls':
+                $host = 'tls://'.$host;
+                break;
+        }
+
+        return $host;
+    }
+}
-- 
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