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