Enigma: Implemented messages signing and encrypting
Aleksander Machniak
9 years ago
parent
0a4e0921d3
commit
a99c34159d
@ -0,0 +1,299 @@
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<?php
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/*
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+-------------------------------------------------------------------------+
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| Mail_mime wrapper for the Enigma Plugin |
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| |
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| Copyright (C) 2010-2015 The Roundcube Dev Team |
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| |
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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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| |
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+-------------------------------------------------------------------------+
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-------------------------------------------------------------------------+
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*/
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class enigma_mime_message extends Mail_mime
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{
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const PGP_SIGNED = 1;
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const PGP_ENCRYPTED = 2;
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protected $_type;
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protected $_message;
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protected $_body;
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protected $_signature;
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protected $_encrypted;
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/**
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* Object constructor
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*
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* @param Mail_mime Original message
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* @param int Output message type
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*/
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function __construct($message, $type)
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{
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$this->_message = $message;
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$this->_type = $type;
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// clone parameters
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foreach (array_keys($this->_build_params) as $param) {
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$this->_build_params[$param] = $message->getParam($param);
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}
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// clone headers
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$this->_headers = $message->_headers;
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/*
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if ($message->getParam('delay_file_io')) {
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// use common temp dir
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$temp_dir = $this->config->get('temp_dir');
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$body_file = tempnam($temp_dir, 'rcmMsg');
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$mime_result = $message->saveMessageBody($body_file);
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if (is_a($mime_result, 'PEAR_Error')) {
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self::raise_error(array('code' => 650, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Could not create message: ".$mime_result->getMessage()),
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true, false);
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return false;
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}
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$msg_body = fopen($body_file, 'r');
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}
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else {
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*/
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// \r\n is must-have here
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$this->_body = $message->get() . "\r\n";
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/*
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}
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*/
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}
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/**
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* Check if the message is multipart (requires PGP/MIME)
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*
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* @return bool True if it is multipart, otherwise False
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*/
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function isMultipart()
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{
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return $this->_message instanceof enigma_mime_message
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|| !empty($this->_message->_parts) || $this->_message->getHTMLBody();
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}
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/**
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* Get e-mail address of message sender
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*
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* @return string Sender address
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*/
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function getFromAddress()
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{
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// get sender address
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$headers = $this->_message->headers();
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$from = rcube_mime::decode_address_list($headers['From'], 1, false, null, true);
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$from = $from[1];
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return $from;
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}
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/**
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* Get recipients' e-mail addresses
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*
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* @return array Recipients' addresses
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*/
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function getRecipients()
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{
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// get sender address
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$headers = $this->_message->headers();
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$to = rcube_mime::decode_address_list($headers['To'], null, false, null, true);
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$cc = rcube_mime::decode_address_list($headers['Cc'], null, false, null, true);
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$bcc = rcube_mime::decode_address_list($headers['Bcc'], null, false, null, true);
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$recipients = array_unique(array_merge($to, $cc, $bcc));
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$recipients = array_diff($recipients, array('undisclosed-recipients:'));
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return $recipients;
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}
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/**
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* Get original message body, to be encrypted/signed
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*
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* @return string Message body
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*/
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function getOrigBody()
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{
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$_headers = $this->_message->headers();
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$headers = array();
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if ($_headers['Content-Transfer-Encoding']) {
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$headers[] = 'Content-Transfer-Encoding: ' . $_headers['Content-Transfer-Encoding'];
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}
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$headers[] = 'Content-Type: ' . $_headers['Content-Type'];
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return implode("\r\n", $headers) . "\r\n\r\n" . $this->_body;
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}
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/**
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* Register signature attachment
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*
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* @param string Signature body
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*/
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function addPGPSignature($body)
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{
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$this->_signature = $body;
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}
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/**
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* Register encrypted body
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*
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* @param string Encrypted body
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*/
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function setPGPEncryptedBody($body)
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{
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$this->_encrypted = $body;
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}
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/**
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* Builds the multipart message.
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*
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* @param array $params Build parameters that change the way the email
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* is built. Should be associative. See $_build_params.
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* @param resource $filename Output file where to save the message instead of
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* returning it
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* @param boolean $skip_head True if you want to return/save only the message
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* without headers
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*
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* @return mixed The MIME message content string, null or PEAR error object
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* @access public
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*/
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function get($params = null, $filename = null, $skip_head = false)
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{
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if (isset($params)) {
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while (list($key, $value) = each($params)) {
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$this->_build_params[$key] = $value;
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}
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}
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$this->_checkParams();
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if ($this->_type == self::PGP_SIGNED) {
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$body = "This is an OpenPGP/MIME signed message (RFC 4880 and 3156)";
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$params = array(
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'content_type' => "multipart/signed; micalg=pgp-sha1; protocol=\"application/pgp-signature\"",
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'eol' => $this->_build_params['eol'],
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);
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$message = new Mail_mimePart($body, $params);
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if (!empty($this->_body)) {
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$headers = $this->_message->headers();
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$params = array('content_type' => $headers['Content-Type']);
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if ($headers['Content-Transfer-Encoding']) {
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$params['encoding'] = $headers['Content-Transfer-Encoding'];
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}
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$message->addSubpart($this->_body, $params);
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}
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if (!empty($this->_signature)) {
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$message->addSubpart($this->_signature, array(
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'filename' => 'signature.asc',
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'content_type' => 'application/pgp-signature',
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'disposition' => 'attachment',
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'description' => 'OpenPGP digital signature',
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));
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}
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}
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else if ($this->_type == self::PGP_ENCRYPTED) {
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$body = "This is an OpenPGP/MIME encrypted message (RFC 4880 and 3156)";
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$params = array(
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'content_type' => "multipart/encrypted; protocol=\"application/pgp-encrypted\"",
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'eol' => $this->_build_params['eol'],
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);
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$message = new Mail_mimePart($body, $params);
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$message->addSubpart('Version: 1', array(
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'content_type' => 'application/pgp-encrypted',
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'description' => 'PGP/MIME version identification',
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));
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$message->addSubpart($this->_encrypted, array(
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'content_type' => 'application/octet-stream',
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'description' => 'PGP/MIME encrypted message',
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'disposition' => 'inline',
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'filename' => 'encrypted.asc',
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));
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}
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// Use saved boundary
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if (!empty($this->_build_params['boundary'])) {
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$boundary = $this->_build_params['boundary'];
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}
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else {
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$boundary = null;
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}
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// Write output to file
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if ($filename) {
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// Append mimePart message headers and body into file
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$headers = $message->encodeToFile($filename, $boundary, $skip_head);
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if ($this->_isError($headers)) {
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return $headers;
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}
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$this->_headers = array_merge($this->_headers, $headers);
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return null;
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}
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else {
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$output = $message->encode($boundary, $skip_head);
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if ($this->_isError($output)) {
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return $output;
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}
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$this->_headers = array_merge($this->_headers, $output['headers']);
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return $output['body'];
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}
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}
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/**
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* Get Content-Type and Content-Transfer-Encoding headers of the message
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*
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* @return array Headers array
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* @access private
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*/
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function _contentHeaders()
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{
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$this->_checkParams();
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$eol = !empty($this->_build_params['eol']) ? $this->_build_params['eol'] : "\r\n";
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// multipart message: and boundary
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if (!empty($this->_build_params['boundary'])) {
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$boundary = $this->_build_params['boundary'];
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}
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else if (!empty($this->_headers['Content-Type'])
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&& preg_match('/boundary="([^"]+)"/', $this->_headers['Content-Type'], $m)
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) {
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$boundary = $m[1];
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}
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else {
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$boundary = '=_' . md5(rand() . microtime());
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}
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$this->_build_params['boundary'] = $boundary;
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if ($this->_type == self::PGP_SIGNED) {
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$headers['Content-Type'] = "multipart/signed; micalg=pgp-sha1;$eol"
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." protocol=\"application/pgp-signature\";$eol"
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." boundary=\"$boundary\"";
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}
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else if ($this->_type == self::PGP_ENCRYPTED) {
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$headers['Content-Type'] = "multipart/encrypted;$eol"
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." protocol=\"application/pgp-encrypted\";$eol"
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." boundary=\"$boundary\"";
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}
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return $headers;
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}
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}
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