--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/lib/Roundcube/rcube_smtp.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,486 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Provide SMTP functionality using socket connections                 |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ +-----------------------------------------------------------------------+
+*/
+
+/**
+ * Class to provide SMTP functionality using PEAR Net_SMTP
+ *
+ * @package    Framework
+ * @subpackage Mail
+ * @author     Thomas Bruederli <roundcube@gmail.com>
+ * @author     Aleksander Machniak <alec@alec.pl>
+ */
+class rcube_smtp
+{
+    private $conn;
+    private $response;
+    private $error;
+    private $anonymize_log = 0;
+
+    // define headers delimiter
+    const SMTP_MIME_CRLF = "\r\n";
+
+    const DEBUG_LINE_LENGTH = 4098; // 4KB + 2B for \r\n
+
+
+    /**
+     * SMTP Connection and authentication
+     *
+     * @param string Server host
+     * @param string Server port
+     * @param string User name
+     * @param string Password
+     *
+     * @return bool  Returns true on success, or false on error
+     */
+    public function connect($host = null, $port = null, $user = null, $pass = null)
+    {
+        $rcube = rcube::get_instance();
+
+        // disconnect/destroy $this->conn
+        $this->disconnect();
+
+        // reset error/response var
+        $this->error = $this->response = null;
+
+        // let plugins alter smtp connection config
+        $CONFIG = $rcube->plugins->exec_hook('smtp_connect', array(
+            'smtp_server'    => $host ?: $rcube->config->get('smtp_server'),
+            'smtp_port'      => $port ?: $rcube->config->get('smtp_port', 25),
+            'smtp_user'      => $user !== null ? $user : $rcube->config->get('smtp_user'),
+            'smtp_pass'      => $pass !== null ? $pass : $rcube->config->get('smtp_pass'),
+            'smtp_auth_cid'  => $rcube->config->get('smtp_auth_cid'),
+            'smtp_auth_pw'   => $rcube->config->get('smtp_auth_pw'),
+            'smtp_auth_type' => $rcube->config->get('smtp_auth_type'),
+            'smtp_helo_host' => $rcube->config->get('smtp_helo_host'),
+            'smtp_timeout'   => $rcube->config->get('smtp_timeout'),
+            'smtp_conn_options'   => $rcube->config->get('smtp_conn_options'),
+            'smtp_auth_callbacks' => array(),
+        ));
+
+        $smtp_host = rcube_utils::parse_host($CONFIG['smtp_server']);
+        // when called from Installer it's possible to have empty $smtp_host here
+        if (!$smtp_host) $smtp_host = 'localhost';
+        $smtp_port     = is_numeric($CONFIG['smtp_port']) ? $CONFIG['smtp_port'] : 25;
+        $smtp_host_url = parse_url($smtp_host);
+
+        // overwrite port
+        if (isset($smtp_host_url['host']) && isset($smtp_host_url['port'])) {
+            $smtp_host = $smtp_host_url['host'];
+            $smtp_port = $smtp_host_url['port'];
+        }
+
+        // re-write smtp host
+        if (isset($smtp_host_url['host']) && isset($smtp_host_url['scheme'])) {
+            $smtp_host = sprintf('%s://%s', $smtp_host_url['scheme'], $smtp_host_url['host']);
+        }
+
+        // remove TLS prefix and set flag for use in Net_SMTP::auth()
+        if (preg_match('#^tls://#i', $smtp_host)) {
+            $smtp_host = preg_replace('#^tls://#i', '', $smtp_host);
+            $use_tls   = true;
+        }
+
+        // Handle per-host socket options
+        rcube_utils::parse_socket_options($CONFIG['smtp_conn_options'], $smtp_host);
+
+        if (!empty($CONFIG['smtp_helo_host'])) {
+            $helo_host = $CONFIG['smtp_helo_host'];
+        }
+        else if (!empty($_SERVER['SERVER_NAME'])) {
+            $helo_host = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']);
+        }
+        else {
+            $helo_host = 'localhost';
+        }
+
+        // IDNA Support
+        $smtp_host = rcube_utils::idn_to_ascii($smtp_host);
+
+        $this->conn = new Net_SMTP($smtp_host, $smtp_port, $helo_host, false, 0, $CONFIG['smtp_conn_options']);
+
+        if ($rcube->config->get('smtp_debug')) {
+            $this->conn->setDebug(true, array($this, 'debug_handler'));
+            $this->anonymize_log = 0;
+        }
+
+        // register authentication methods
+        if (!empty($CONFIG['smtp_auth_callbacks']) && method_exists($this->conn, 'setAuthMethod')) {
+            foreach ($CONFIG['smtp_auth_callbacks'] as $callback) {
+                $this->conn->setAuthMethod($callback['name'], $callback['function'],
+                    isset($callback['prepend']) ? $callback['prepend'] : true);
+            }
+        }
+
+        // try to connect to server and exit on failure
+        $result = $this->conn->connect($CONFIG['smtp_timeout']);
+
+        if (is_a($result, 'PEAR_Error')) {
+            $this->response[] = "Connection failed: " . $result->getMessage();
+
+            list($code,) = $this->conn->getResponse();
+            $this->error = array('label' => 'smtpconnerror', 'vars' => array('code' => $code));
+            $this->conn  = null;
+
+            return false;
+        }
+
+        // workaround for timeout bug in Net_SMTP 1.5.[0-1] (#1487843)
+        if (method_exists($this->conn, 'setTimeout')
+            && ($timeout = ini_get('default_socket_timeout'))
+        ) {
+            $this->conn->setTimeout($timeout);
+        }
+
+        $smtp_user = str_replace('%u', $rcube->get_user_name(), $CONFIG['smtp_user']);
+        $smtp_pass = str_replace('%p', $rcube->get_user_password(), $CONFIG['smtp_pass']);
+        $smtp_auth_type = $CONFIG['smtp_auth_type'] ?: null;
+
+        if (!empty($CONFIG['smtp_auth_cid'])) {
+            $smtp_authz = $smtp_user;
+            $smtp_user  = $CONFIG['smtp_auth_cid'];
+            $smtp_pass  = $CONFIG['smtp_auth_pw'];
+        }
+
+        // attempt to authenticate to the SMTP server
+        if ($smtp_user && $smtp_pass) {
+            // IDNA Support
+            if (strpos($smtp_user, '@')) {
+                $smtp_user = rcube_utils::idn_to_ascii($smtp_user);
+            }
+
+            $result = $this->conn->auth($smtp_user, $smtp_pass, $smtp_auth_type, $use_tls, $smtp_authz);
+
+            if (is_a($result, 'PEAR_Error')) {
+                list($code,) = $this->conn->getResponse();
+                $this->error = array('label' => 'smtpautherror', 'vars' => array('code' => $code));
+                $this->response[] = 'Authentication failure: ' . $result->getMessage()
+                    . ' (Code: ' . $result->getCode() . ')';
+
+                $this->reset();
+                $this->disconnect();
+
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Function for sending mail
+     *
+     * @param string Sender e-Mail address
+     *
+     * @param mixed  Either a comma-separated list of recipients
+     *               (RFC822 compliant), or an array of recipients,
+     *               each RFC822 valid. This may contain recipients not
+     *               specified in the headers, for Bcc:, resending
+     *               messages, etc.
+     * @param mixed  The message headers to send with the mail
+     *               Either as an associative array or a finally
+     *               formatted string
+     * @param mixed  The full text of the message body, including any Mime parts
+     *               or file handle
+     * @param array  Delivery options (e.g. DSN request)
+     *
+     * @return bool  Returns true on success, or false on error
+     */
+    public function send_mail($from, $recipients, &$headers, &$body, $opts=null)
+    {
+        if (!is_object($this->conn)) {
+            return false;
+        }
+
+        // prepare message headers as string
+        if (is_array($headers)) {
+            if (!($headerElements = $this->_prepare_headers($headers))) {
+                $this->reset();
+                return false;
+            }
+
+            list($from, $text_headers) = $headerElements;
+        }
+        else if (is_string($headers)) {
+            $text_headers = $headers;
+        }
+
+        // exit if no from address is given
+        if (!isset($from)) {
+            $this->reset();
+            $this->response[] = "No From address has been provided";
+            return false;
+        }
+
+        // RFC3461: Delivery Status Notification
+        if ($opts['dsn']) {
+            $exts = $this->conn->getServiceExtensions();
+
+            if (isset($exts['DSN'])) {
+                $from_params      = 'RET=HDRS';
+                $recipient_params = 'NOTIFY=SUCCESS,FAILURE';
+            }
+        }
+
+        // RFC2298.3: remove envelope sender address
+        if (empty($opts['mdn_use_from'])
+            && preg_match('/Content-Type: multipart\/report/', $text_headers)
+            && preg_match('/report-type=disposition-notification/', $text_headers)
+        ) {
+            $from = '';
+        }
+
+        // set From: address
+        $result = $this->conn->mailFrom($from, $from_params);
+        if (is_a($result, 'PEAR_Error')) {
+            $err = $this->conn->getResponse();
+            $this->error = array('label' => 'smtpfromerror', 'vars' => array(
+                'from' => $from, 'code' => $err[0], 'msg' => $err[1]));
+            $this->response[] = "Failed to set sender '$from'. "
+                . $err[1] . ' (Code: ' . $err[0] . ')';
+            $this->reset();
+            return false;
+        }
+
+        // prepare list of recipients
+        $recipients = $this->_parse_rfc822($recipients);
+        if (is_a($recipients, 'PEAR_Error')) {
+            $this->error = array('label' => 'smtprecipientserror');
+            $this->reset();
+            return false;
+        }
+
+        // set mail recipients
+        foreach ($recipients as $recipient) {
+            $result = $this->conn->rcptTo($recipient, $recipient_params);
+            if (is_a($result, 'PEAR_Error')) {
+                $err = $this->conn->getResponse();
+                $this->error = array('label' => 'smtptoerror', 'vars' => array(
+                    'to' => $recipient, 'code' => $err[0], 'msg' => $err[1]));
+                $this->response[] = "Failed to add recipient '$recipient'. "
+                    . $err[1] . ' (Code: ' . $err[0] . ')';
+                $this->reset();
+                return false;
+            }
+        }
+
+        if (is_resource($body)) {
+            // file handle
+            $data = $body;
+
+            if ($text_headers) {
+                $text_headers = preg_replace('/[\r\n]+$/', '', $text_headers);
+            }
+        }
+        else {
+            // Concatenate headers and body so it can be passed by reference to SMTP_CONN->data
+            // so preg_replace in SMTP_CONN->quotedata will store a reference instead of a copy.
+            // We are still forced to make another copy here for a couple ticks so we don't really
+            // get to save a copy in the method call.
+            $data = $text_headers . "\r\n" . $body;
+
+            // unset old vars to save data and so we can pass into SMTP_CONN->data by reference.
+            unset($text_headers, $body);
+        }
+
+        // Send the message's headers and the body as SMTP data.
+        $result = $this->conn->data($data, $text_headers);
+        if (is_a($result, 'PEAR_Error')) {
+            $err = $this->conn->getResponse();
+            if (!in_array($err[0], array(354, 250, 221))) {
+                $msg = sprintf('[%d] %s', $err[0], $err[1]);
+            }
+            else {
+                $msg = $result->getMessage();
+            }
+
+            $this->error = array('label' => 'smtperror', 'vars' => array('msg' => $msg));
+            $this->response[] = "Failed to send data. " . $msg;
+            $this->reset();
+            return false;
+        }
+
+        $this->response[] = join(': ', $this->conn->getResponse());
+        return true;
+    }
+
+    /**
+     * Reset the global SMTP connection
+     */
+    public function reset()
+    {
+        if (is_object($this->conn)) {
+            $this->conn->rset();
+        }
+    }
+
+    /**
+     * Disconnect the global SMTP connection
+     */
+    public function disconnect()
+    {
+        if (is_object($this->conn)) {
+            $this->conn->disconnect();
+            $this->conn = null;
+        }
+    }
+
+    /**
+     * This is our own debug handler for the SMTP connection
+     */
+    public function debug_handler(&$smtp, $message)
+    {
+        // catch AUTH commands and set anonymization flag for subsequent sends
+        if (preg_match('/^Send: AUTH ([A-Z]+)/', $message, $m)) {
+            $this->anonymize_log = $m[1] == 'LOGIN' ? 2 : 1;
+        }
+        // anonymize this log entry
+        else if ($this->anonymize_log > 0 && strpos($message, 'Send:') === 0 && --$this->anonymize_log == 0) {
+            $message = sprintf('Send: ****** [%d]', strlen($message) - 8);
+        }
+
+        if (($len = strlen($message)) > self::DEBUG_LINE_LENGTH) {
+            $diff    = $len - self::DEBUG_LINE_LENGTH;
+            $message = substr($message, 0, self::DEBUG_LINE_LENGTH)
+                . "... [truncated $diff bytes]";
+        }
+
+        rcube::write_log('smtp', preg_replace('/\r\n$/', '', $message));
+    }
+
+    /**
+     * Get error message
+     */
+    public function get_error()
+    {
+        return $this->error;
+    }
+
+    /**
+     * Get server response messages array
+     */
+    public function get_response()
+    {
+         return $this->response;
+    }
+
+    /**
+     * Take an array of mail headers and return a string containing
+     * text usable in sending a message.
+     *
+     * @param array $headers The array of headers to prepare, in an associative
+     *              array, where the array key is the header name (ie,
+     *              'Subject'), and the array value is the header
+     *              value (ie, 'test'). The header produced from those
+     *              values would be 'Subject: test'.
+     *
+     * @return mixed Returns false if it encounters a bad address,
+     *               otherwise returns an array containing two
+     *               elements: Any From: address found in the headers,
+     *               and the plain text version of the headers.
+     */
+    private function _prepare_headers($headers)
+    {
+        $lines = array();
+        $from  = null;
+
+        foreach ($headers as $key => $value) {
+            if (strcasecmp($key, 'From') === 0) {
+                $addresses = $this->_parse_rfc822($value);
+
+                if (is_array($addresses)) {
+                    $from = $addresses[0];
+                }
+
+                // Reject envelope From: addresses with spaces.
+                if (strpos($from, ' ') !== false) {
+                    return false;
+                }
+
+                $lines[] = $key . ': ' . $value;
+            }
+            else if (strcasecmp($key, 'Received') === 0) {
+                $received = array();
+                if (is_array($value)) {
+                    foreach ($value as $line) {
+                        $received[] = $key . ': ' . $line;
+                    }
+                }
+                else {
+                    $received[] = $key . ': ' . $value;
+                }
+
+                // Put Received: headers at the top.  Spam detectors often
+                // flag messages with Received: headers after the Subject:
+                // as spam.
+                $lines = array_merge($received, $lines);
+            }
+            else {
+                // If $value is an array (i.e., a list of addresses), convert
+                // it to a comma-delimited string of its elements (addresses).
+                if (is_array($value)) {
+                    $value = implode(', ', $value);
+                }
+
+                $lines[] = $key . ': ' . $value;
+            }
+        }
+
+        return array($from, join(self::SMTP_MIME_CRLF, $lines) . self::SMTP_MIME_CRLF);
+    }
+
+    /**
+     * Take a set of recipients and parse them, returning an array of
+     * bare addresses (forward paths) that can be passed to sendmail
+     * or an smtp server with the rcpt to: command.
+     *
+     * @param mixed Either a comma-separated list of recipients
+     *              (RFC822 compliant), or an array of recipients,
+     *              each RFC822 valid.
+     *
+     * @return array An array of forward paths (bare addresses).
+     */
+    private function _parse_rfc822($recipients)
+    {
+        // if we're passed an array, assume addresses are valid and implode them before parsing.
+        if (is_array($recipients)) {
+            $recipients = implode(', ', $recipients);
+        }
+
+        $addresses  = array();
+        $recipients = preg_replace('/[\s\t]*\r?\n/', '', $recipients);
+        $recipients = rcube_utils::explode_quoted_string(',', $recipients);
+
+        reset($recipients);
+        foreach ($recipients as $recipient) {
+            $a = rcube_utils::explode_quoted_string(' ', $recipient);
+            foreach ($a as $word) {
+                $word = trim($word);
+                $len  = strlen($word);
+
+                if ($len && strpos($word, "@") > 0 && $word[$len-1] != '"') {
+                    $word = preg_replace('/^<|>$/', '', $word);
+                    if (!in_array($word, $addresses)) {
+                        array_push($addresses, $word);
+                    }
+                }
+            }
+        }
+
+        return $addresses;
+    }
+}