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1204 lines
36 KiB
PHP
1204 lines
36 KiB
PHP
<?php
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/**
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+-------------------------------------------------------------------------+
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| Engine of the Enigma Plugin |
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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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| Author: Aleksander Machniak <alec@alec.pl> |
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+-------------------------------------------------------------------------+
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*/
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/**
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* Enigma plugin engine.
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*
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* RFC2440: OpenPGP Message Format
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* RFC3156: MIME Security with OpenPGP
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* RFC3851: S/MIME
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*/
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class enigma_engine
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{
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private $rc;
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private $enigma;
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private $pgp_driver;
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private $smime_driver;
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private $password_time;
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public $decryptions = array();
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public $signatures = array();
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public $signed_parts = array();
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public $encrypted_parts = array();
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const SIGN_MODE_BODY = 1;
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const SIGN_MODE_SEPARATE = 2;
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const SIGN_MODE_MIME = 3;
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const ENCRYPT_MODE_BODY = 1;
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const ENCRYPT_MODE_MIME = 2;
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/**
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* Plugin initialization.
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*/
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function __construct($enigma)
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{
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$this->rc = rcmail::get_instance();
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$this->enigma = $enigma;
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$this->password_time = $this->rc->config->get('enigma_password_time') * 60;
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// this will remove passwords from session after some time
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if ($this->password_time) {
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$this->get_passwords();
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}
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}
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/**
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* PGP driver initialization.
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*/
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function load_pgp_driver()
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{
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if ($this->pgp_driver) {
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return;
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}
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$driver = 'enigma_driver_' . $this->rc->config->get('enigma_pgp_driver', 'gnupg');
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$username = $this->rc->user->get_username();
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// Load driver
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$this->pgp_driver = new $driver($username);
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if (!$this->pgp_driver) {
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rcube::raise_error(array(
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'code' => 600, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Enigma plugin: Unable to load PGP driver: $driver"
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), true, true);
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}
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// Initialise driver
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$result = $this->pgp_driver->init();
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if ($result instanceof enigma_error) {
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rcube::raise_error(array(
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'code' => 600, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Enigma plugin: ".$result->getMessage()
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), true, true);
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}
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}
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/**
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* S/MIME driver initialization.
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*/
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function load_smime_driver()
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{
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if ($this->smime_driver) {
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return;
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}
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$driver = 'enigma_driver_' . $this->rc->config->get('enigma_smime_driver', 'phpssl');
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$username = $this->rc->user->get_username();
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// Load driver
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$this->smime_driver = new $driver($username);
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if (!$this->smime_driver) {
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rcube::raise_error(array(
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'code' => 600, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Enigma plugin: Unable to load S/MIME driver: $driver"
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), true, true);
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}
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// Initialise driver
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$result = $this->smime_driver->init();
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if ($result instanceof enigma_error) {
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rcube::raise_error(array(
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'code' => 600, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Enigma plugin: ".$result->getMessage()
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), true, true);
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}
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}
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/**
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* Handler for message signing
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*
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* @param Mail_mime Original message
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* @param int Encryption mode
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*
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* @return enigma_error On error returns error object
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*/
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function sign_message(&$message, $mode = null)
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{
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$mime = new enigma_mime_message($message, enigma_mime_message::PGP_SIGNED);
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$from = $mime->getFromAddress();
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// find private key
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$key = $this->find_key($from, true);
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if (empty($key)) {
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return new enigma_error(enigma_error::E_KEYNOTFOUND);
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}
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// check if we have password for this key
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$passwords = $this->get_passwords();
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$pass = $passwords[$key->id];
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if ($pass === null) {
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// ask for password
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$error = array('missing' => array($key->id => $key->name));
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return new enigma_error(enigma_error::E_BADPASS, '', $error);
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}
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// select mode
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switch ($mode) {
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case self::SIGN_MODE_BODY:
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$pgp_mode = Crypt_GPG::SIGN_MODE_CLEAR;
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break;
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case self::SIGN_MODE_MIME:
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$pgp_mode = Crypt_GPG::SIGN_MODE_DETACHED;
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break;
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/*
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case self::SIGN_MODE_SEPARATE:
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$pgp_mode = Crypt_GPG::SIGN_MODE_NORMAL;
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break;
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*/
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default:
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if ($mime->isMultipart()) {
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$pgp_mode = Crypt_GPG::SIGN_MODE_DETACHED;
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}
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else {
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$pgp_mode = Crypt_GPG::SIGN_MODE_CLEAR;
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}
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}
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// get message body
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if ($pgp_mode == Crypt_GPG::SIGN_MODE_CLEAR) {
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// in this mode we'll replace text part
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// with the one containing signature
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$body = $message->getTXTBody();
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}
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else {
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// here we'll build PGP/MIME message
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$body = $mime->getOrigBody();
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}
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// sign the body
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$result = $this->pgp_sign($body, $key->id, $pass, $pgp_mode);
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if ($result !== true) {
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if ($result->getCode() == enigma_error::E_BADPASS) {
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// ask for password
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$error = array('missing' => array($key->id => $key->name));
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return new enigma_error(enigma_error::E_BADPASS, '', $error);
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}
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return $result;
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}
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// replace message body
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if ($pgp_mode == Crypt_GPG::SIGN_MODE_CLEAR) {
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$message->setTXTBody($body);
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}
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else {
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$mime->addPGPSignature($body);
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$message = $mime;
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}
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}
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/**
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* Handler for message encryption
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*
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* @param Mail_mime Original message
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* @param int Encryption mode
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* @param bool Is draft-save action - use only sender's key for encryption
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*
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* @return enigma_error On error returns error object
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*/
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function encrypt_message(&$message, $mode = null, $is_draft = false)
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{
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$mime = new enigma_mime_message($message, enigma_mime_message::PGP_ENCRYPTED);
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// always use sender's key
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$recipients = array($mime->getFromAddress());
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// if it's not a draft we add all recipients' keys
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if (!$is_draft) {
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$recipients = array_merge($recipients, $mime->getRecipients());
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}
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if (empty($recipients)) {
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return new enigma_error(enigma_error::E_KEYNOTFOUND);
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}
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$recipients = array_unique($recipients);
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// find recipient public keys
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foreach ((array) $recipients as $email) {
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$key = $this->find_key($email);
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if (empty($key)) {
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return new enigma_error(enigma_error::E_KEYNOTFOUND, '', array(
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'missing' => $email
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));
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}
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$keys[] = $key->id;
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}
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// select mode
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switch ($mode) {
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case self::ENCRYPT_MODE_BODY:
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$encrypt_mode = $mode;
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break;
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case self::ENCRYPT_MODE_MIME:
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$encrypt_mode = $mode;
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break;
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default:
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$encrypt_mode = $mime->isMultipart() ? self::ENCRYPT_MODE_MIME : self::ENCRYPT_MODE_BODY;
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}
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// get message body
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if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
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// in this mode we'll replace text part
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// with the one containing encrypted message
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$body = $message->getTXTBody();
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}
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else {
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// here we'll build PGP/MIME message
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$body = $mime->getOrigBody();
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}
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// sign the body
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$result = $this->pgp_encrypt($body, $keys);
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if ($result !== true) {
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return $result;
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}
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// replace message body
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if ($encrypt_mode == self::ENCRYPT_MODE_BODY) {
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$message->setTXTBody($body);
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}
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else {
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$mime->setPGPEncryptedBody($body);
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$message = $mime;
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}
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}
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/**
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* Handler for message_part_structure hook.
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* Called for every part of the message.
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*
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* @param array Original parameters
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*
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* @return array Modified parameters
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*/
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function part_structure($p)
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{
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if ($p['mimetype'] == 'text/plain' || $p['mimetype'] == 'application/pgp') {
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$this->parse_plain($p);
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}
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else if ($p['mimetype'] == 'multipart/signed') {
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$this->parse_signed($p);
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}
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else if ($p['mimetype'] == 'multipart/encrypted') {
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$this->parse_encrypted($p);
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}
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else if ($p['mimetype'] == 'application/pkcs7-mime') {
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$this->parse_encrypted($p);
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}
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return $p;
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}
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/**
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* Handler for message_part_body hook.
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*
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* @param array Original parameters
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*
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* @return array Modified parameters
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*/
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function part_body($p)
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{
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// encrypted attachment, see parse_plain_encrypted()
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if ($p['part']->need_decryption && $p['part']->body === null) {
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$this->load_pgp_driver();
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$storage = $this->rc->get_storage();
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$body = $storage->get_message_part($p['object']->uid, $p['part']->mime_id, $p['part'], null, null, true, 0, false);
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$result = $this->pgp_decrypt($body);
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// @TODO: what to do on error?
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if ($result === true) {
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$p['part']->body = $body;
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$p['part']->size = strlen($body);
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$p['part']->body_modified = true;
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}
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}
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return $p;
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}
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/**
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* Handler for plain/text message.
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*
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* @param array Reference to hook's parameters
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*/
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function parse_plain(&$p)
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{
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$part = $p['structure'];
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// exit, if we're already inside a decrypted message
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if (in_array($part->mime_id, $this->encrypted_parts)) {
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return;
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}
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// Get message body from IMAP server
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$body = $this->get_part_body($p['object'], $part->mime_id);
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// @TODO: big message body could be a file resource
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// PGP signed message
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if (preg_match('/^-----BEGIN PGP SIGNED MESSAGE-----/', $body)) {
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$this->parse_plain_signed($p, $body);
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}
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// PGP encrypted message
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else if (preg_match('/^-----BEGIN PGP MESSAGE-----/', $body)) {
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$this->parse_plain_encrypted($p, $body);
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}
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}
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/**
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* Handler for multipart/signed message.
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*
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* @param array Reference to hook's parameters
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*/
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function parse_signed(&$p)
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{
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$struct = $p['structure'];
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// S/MIME
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if ($struct->parts[1] && $struct->parts[1]->mimetype == 'application/pkcs7-signature') {
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$this->parse_smime_signed($p);
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}
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// PGP/MIME: RFC3156
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// The multipart/signed body MUST consist of exactly two parts.
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// The first part contains the signed data in MIME canonical format,
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// including a set of appropriate content headers describing the data.
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// The second body MUST contain the PGP digital signature. It MUST be
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// labeled with a content type of "application/pgp-signature".
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else if ($struct->ctype_parameters['protocol'] == 'application/pgp-signature'
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&& count($struct->parts) == 2
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&& $struct->parts[1] && $struct->parts[1]->mimetype == 'application/pgp-signature'
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) {
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$this->parse_pgp_signed($p);
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}
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}
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/**
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* Handler for multipart/encrypted message.
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*
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* @param array Reference to hook's parameters
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*/
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function parse_encrypted(&$p)
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{
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$struct = $p['structure'];
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// S/MIME
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if ($struct->mimetype == 'application/pkcs7-mime') {
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$this->parse_smime_encrypted($p);
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}
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// PGP/MIME: RFC3156
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// The multipart/encrypted MUST consist of exactly two parts. The first
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// MIME body part must have a content type of "application/pgp-encrypted".
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// This body contains the control information.
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// The second MIME body part MUST contain the actual encrypted data. It
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// must be labeled with a content type of "application/octet-stream".
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else if ($struct->ctype_parameters['protocol'] == 'application/pgp-encrypted'
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&& count($struct->parts) == 2
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&& $struct->parts[0] && $struct->parts[0]->mimetype == 'application/pgp-encrypted'
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&& $struct->parts[1] && $struct->parts[1]->mimetype == 'application/octet-stream'
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) {
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$this->parse_pgp_encrypted($p);
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}
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}
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/**
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* Handler for plain signed message.
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* Excludes message and signature bodies and verifies signature.
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*
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* @param array Reference to hook's parameters
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* @param string Message (part) body
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*/
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private function parse_plain_signed(&$p, $body)
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{
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$this->load_pgp_driver();
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$part = $p['structure'];
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// Verify signature
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if ($this->rc->action == 'show' || $this->rc->action == 'preview') {
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if ($this->rc->config->get('enigma_signatures', true)) {
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$sig = $this->pgp_verify($body);
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}
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}
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// @TODO: Handle big bodies using (temp) files
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// In this way we can use fgets on string as on file handle
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$fh = fopen('php://memory', 'br+');
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// @TODO: fopen/fwrite errors handling
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if ($fh) {
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fwrite($fh, $body);
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rewind($fh);
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}
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$body = $part->body = null;
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$part->body_modified = true;
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// Extract body (and signature?)
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while (!feof($fh)) {
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$line = fgets($fh, 1024);
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if ($part->body === null)
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$part->body = '';
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else if (preg_match('/^-----BEGIN PGP SIGNATURE-----/', $line))
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break;
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else
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$part->body .= $line;
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}
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// Remove "Hash" Armor Headers
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$part->body = preg_replace('/^.*\r*\n\r*\n/', '', $part->body);
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// de-Dash-Escape (RFC2440)
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$part->body = preg_replace('/(^|\n)- -/', '\\1-', $part->body);
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// Store signature data for display
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if (!empty($sig)) {
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$this->signed_parts[$part->mime_id] = $part->mime_id;
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$this->signatures[$part->mime_id] = $sig;
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}
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fclose($fh);
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}
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/**
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* Handler for PGP/MIME signed message.
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* Verifies signature.
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*
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* @param array Reference to hook's parameters
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*/
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private function parse_pgp_signed(&$p)
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{
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if (!$this->rc->config->get('enigma_signatures', true)) {
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return;
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}
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if ($this->rc->action != 'show' && $this->rc->action != 'preview') {
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return;
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}
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$this->load_pgp_driver();
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$struct = $p['structure'];
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$msg_part = $struct->parts[0];
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$sig_part = $struct->parts[1];
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// Get bodies
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// Note: The first part body need to be full part body with headers
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// it also cannot be decoded
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$msg_body = $this->get_part_body($p['object'], $msg_part->mime_id, true);
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$sig_body = $this->get_part_body($p['object'], $sig_part->mime_id);
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// Verify
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$sig = $this->pgp_verify($msg_body, $sig_body);
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// Store signature data for display
|
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$this->signatures[$struct->mime_id] = $sig;
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|
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// Message can be multipart (assign signature to each subpart)
|
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if (!empty($msg_part->parts)) {
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foreach ($msg_part->parts as $part)
|
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$this->signed_parts[$part->mime_id] = $struct->mime_id;
|
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}
|
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else {
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$this->signed_parts[$msg_part->mime_id] = $struct->mime_id;
|
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}
|
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}
|
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|
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/**
|
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* Handler for S/MIME signed message.
|
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* Verifies signature.
|
|
*
|
|
* @param array Reference to hook's parameters
|
|
*/
|
|
private function parse_smime_signed(&$p)
|
|
{
|
|
return; // @TODO
|
|
|
|
if (!$this->rc->config->get('enigma_signatures', true)) {
|
|
return;
|
|
}
|
|
|
|
// Verify signature
|
|
if ($this->rc->action == 'show' || $this->rc->action == 'preview') {
|
|
$this->load_smime_driver();
|
|
|
|
$struct = $p['structure'];
|
|
$msg_part = $struct->parts[0];
|
|
|
|
// Verify
|
|
$sig = $this->smime_driver->verify($struct, $p['object']);
|
|
|
|
// Store signature data for display
|
|
$this->signatures[$struct->mime_id] = $sig;
|
|
|
|
// Message can be multipart (assign signature to each subpart)
|
|
if (!empty($msg_part->parts)) {
|
|
foreach ($msg_part->parts as $part)
|
|
$this->signed_parts[$part->mime_id] = $struct->mime_id;
|
|
}
|
|
else {
|
|
$this->signed_parts[$msg_part->mime_id] = $struct->mime_id;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for plain encrypted message.
|
|
*
|
|
* @param array Reference to hook's parameters
|
|
* @param string Message (part) body
|
|
*/
|
|
private function parse_plain_encrypted(&$p, $body)
|
|
{
|
|
if (!$this->rc->config->get('enigma_decryption', true)) {
|
|
return;
|
|
}
|
|
|
|
$this->load_pgp_driver();
|
|
$part = $p['structure'];
|
|
|
|
// Decrypt
|
|
$result = $this->pgp_decrypt($body);
|
|
|
|
// Store decryption status
|
|
$this->decryptions[$part->mime_id] = $result;
|
|
|
|
// find parent part ID
|
|
if (strpos($part->mime_id, '.')) {
|
|
$items = explode('.', $part->mime_id);
|
|
array_pop($items);
|
|
$parent = implode('.', $items);
|
|
}
|
|
else {
|
|
$parent = 0;
|
|
}
|
|
|
|
// Parse decrypted message
|
|
if ($result === true) {
|
|
$part->body = $body;
|
|
$part->body_modified = true;
|
|
|
|
// Remember it was decrypted
|
|
$this->encrypted_parts[] = $part->mime_id;
|
|
|
|
// PGP signed inside? verify signature
|
|
if (preg_match('/^-----BEGIN PGP SIGNED MESSAGE-----/', $body)) {
|
|
$this->parse_plain_signed($p, $body);
|
|
}
|
|
|
|
// Encrypted plain message may contain encrypted attachments
|
|
// in such case attachments have .pgp extension and type application/octet-stream.
|
|
// This is what happens when you select "Encrypt each attachment separately
|
|
// and send the message using inline PGP" in Thunderbird's Enigmail.
|
|
|
|
if ($p['object']->mime_parts[$parent]) {
|
|
foreach ((array)$p['object']->mime_parts[$parent]->parts as $p) {
|
|
if ($p->disposition == 'attachment' && $p->mimetype == 'application/octet-stream'
|
|
&& preg_match('/^(.*)\.pgp$/i', $p->filename, $m)
|
|
) {
|
|
// modify filename
|
|
$p->filename = $m[1];
|
|
// flag the part, it will be decrypted when needed
|
|
$p->need_decryption = true;
|
|
// disable caching
|
|
$p->body_modified = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// decryption failed, but the message may have already
|
|
// been cached with the modified parts (see above),
|
|
// let's bring the original state back
|
|
else if ($p['object']->mime_parts[$parent]) {
|
|
foreach ((array)$p['object']->mime_parts[$parent]->parts as $p) {
|
|
if ($p->need_decryption && !preg_match('/^(.*)\.pgp$/i', $p->filename, $m)) {
|
|
// modify filename
|
|
$p->filename .= '.pgp';
|
|
// flag the part, it will be decrypted when needed
|
|
unset($p->need_decryption);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for PGP/MIME encrypted message.
|
|
*
|
|
* @param array Reference to hook's parameters
|
|
*/
|
|
private function parse_pgp_encrypted(&$p)
|
|
{
|
|
if (!$this->rc->config->get('enigma_decryption', true)) {
|
|
return;
|
|
}
|
|
|
|
$this->load_pgp_driver();
|
|
|
|
$struct = $p['structure'];
|
|
$part = $struct->parts[1];
|
|
|
|
// Get body
|
|
$body = $this->get_part_body($p['object'], $part->mime_id);
|
|
|
|
// Decrypt
|
|
$result = $this->pgp_decrypt($body);
|
|
|
|
if ($result === true) {
|
|
// Parse decrypted message
|
|
$struct = $this->parse_body($body);
|
|
|
|
// Modify original message structure
|
|
$this->modify_structure($p, $struct);
|
|
|
|
// Attach the decryption message to all parts
|
|
$this->decryptions[$struct->mime_id] = $result;
|
|
foreach ((array) $struct->parts as $sp) {
|
|
$this->decryptions[$sp->mime_id] = $result;
|
|
}
|
|
}
|
|
else {
|
|
$this->decryptions[$part->mime_id] = $result;
|
|
|
|
// Make sure decryption status message will be displayed
|
|
$part->type = 'content';
|
|
$p['object']->parts[] = $part;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for S/MIME encrypted message.
|
|
*
|
|
* @param array Reference to hook's parameters
|
|
*/
|
|
private function parse_smime_encrypted(&$p)
|
|
{
|
|
if (!$this->rc->config->get('enigma_decryption', true)) {
|
|
return;
|
|
}
|
|
|
|
// $this->load_smime_driver();
|
|
}
|
|
|
|
/**
|
|
* PGP signature verification.
|
|
*
|
|
* @param mixed Message body
|
|
* @param mixed Signature body (for MIME messages)
|
|
*
|
|
* @return mixed enigma_signature or enigma_error
|
|
*/
|
|
private function pgp_verify(&$msg_body, $sig_body=null)
|
|
{
|
|
// @TODO: Handle big bodies using (temp) files
|
|
$sig = $this->pgp_driver->verify($msg_body, $sig_body);
|
|
|
|
if (($sig instanceof enigma_error) && $sig->getCode() != enigma_error::E_KEYNOTFOUND)
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $sig->getMessage()
|
|
), true, false);
|
|
|
|
return $sig;
|
|
}
|
|
|
|
/**
|
|
* PGP message decryption.
|
|
*
|
|
* @param mixed Message body
|
|
*
|
|
* @return mixed True or enigma_error
|
|
*/
|
|
private function pgp_decrypt(&$msg_body)
|
|
{
|
|
// @TODO: Handle big bodies using (temp) files
|
|
$keys = $this->get_passwords();
|
|
$result = $this->pgp_driver->decrypt($msg_body, $keys);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
$err_code = $result->getCode();
|
|
if (!in_array($err_code, array(enigma_error::E_KEYNOTFOUND, enigma_error::E_BADPASS)))
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
return $result;
|
|
}
|
|
|
|
$msg_body = $result;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* PGP message signing
|
|
*
|
|
* @param mixed Message body
|
|
* @param string Key ID
|
|
* @param string Key passphrase
|
|
* @param int Signing mode
|
|
*
|
|
* @return mixed True or enigma_error
|
|
*/
|
|
private function pgp_sign(&$msg_body, $keyid, $password, $mode = null)
|
|
{
|
|
// @TODO: Handle big bodies using (temp) files
|
|
$result = $this->pgp_driver->sign($msg_body, $keyid, $password, $mode);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
$err_code = $result->getCode();
|
|
if (!in_array($err_code, array(enigma_error::E_KEYNOTFOUND, enigma_error::E_BADPASS)))
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
return $result;
|
|
}
|
|
|
|
$msg_body = $result;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* PGP message encrypting
|
|
*
|
|
* @param mixed Message body
|
|
* @param array Keys
|
|
*
|
|
* @return mixed True or enigma_error
|
|
*/
|
|
private function pgp_encrypt(&$msg_body, $keys)
|
|
{
|
|
// @TODO: Handle big bodies using (temp) files
|
|
$result = $this->pgp_driver->encrypt($msg_body, $keys);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
$err_code = $result->getCode();
|
|
if (!in_array($err_code, array(enigma_error::E_KEYNOTFOUND, enigma_error::E_BADPASS)))
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
return $result;
|
|
}
|
|
|
|
$msg_body = $result;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* PGP keys listing.
|
|
*
|
|
* @param mixed Key ID/Name pattern
|
|
*
|
|
* @return mixed Array of keys or enigma_error
|
|
*/
|
|
function list_keys($pattern = '')
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->list_keys($pattern);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Find PGP private/public key
|
|
*
|
|
* @param string E-mail address
|
|
* @param bool Need a key for signing?
|
|
*
|
|
* @return enigma_key The key
|
|
*/
|
|
function find_key($email, $can_sign = false)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->list_keys($email);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
|
|
return;
|
|
}
|
|
|
|
$mode = $can_sign ? enigma_key::CAN_SIGN : enigma_key::CAN_ENCRYPT;
|
|
|
|
// check key validity and type
|
|
foreach ($result as $key) {
|
|
if ($keyid = $key->find_subkey($email, $mode)) {
|
|
return $key;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* PGP key details.
|
|
*
|
|
* @param mixed Key ID
|
|
*
|
|
* @return mixed enigma_key or enigma_error
|
|
*/
|
|
function get_key($keyid)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->get_key($keyid);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* PGP key delete.
|
|
*
|
|
* @param string Key ID
|
|
*
|
|
* @return enigma_error|bool True on success
|
|
*/
|
|
function delete_key($keyid)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->delete_key($keyid);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* PGP keys pair generation.
|
|
*
|
|
* @param array Key pair parameters
|
|
*
|
|
* @return mixed enigma_key or enigma_error
|
|
*/
|
|
function generate_key($data)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->gen_key($data);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* PGP keys/certs importing.
|
|
*
|
|
* @param mixed Import file name or content
|
|
* @param boolean True if first argument is a filename
|
|
*
|
|
* @return mixed Import status data array or enigma_error
|
|
*/
|
|
function import_key($content, $isfile=false)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->import($content, $isfile);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
}
|
|
else {
|
|
$result['imported'] = $result['public_imported'] + $result['private_imported'];
|
|
$result['unchanged'] = $result['public_unchanged'] + $result['private_unchanged'];
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Handler for keys/certs import request action
|
|
*/
|
|
function import_file()
|
|
{
|
|
$uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST);
|
|
$mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_POST);
|
|
$mime_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_POST);
|
|
$storage = $this->rc->get_storage();
|
|
|
|
if ($uid && $mime_id) {
|
|
$storage->set_folder($mbox);
|
|
$part = $storage->get_message_part($uid, $mime_id);
|
|
}
|
|
|
|
if ($part && is_array($result = $this->import_key($part))) {
|
|
$this->rc->output->show_message('enigma.keysimportsuccess', 'confirmation',
|
|
array('new' => $result['imported'], 'old' => $result['unchanged']));
|
|
}
|
|
else
|
|
$this->rc->output->show_message('enigma.keysimportfailed', 'error');
|
|
|
|
$this->rc->output->send();
|
|
}
|
|
|
|
/**
|
|
* PGP keys/certs export..
|
|
*
|
|
* @param string Key ID
|
|
* @param resource Optional output stream
|
|
*
|
|
* @return mixed Key content or enigma_error
|
|
*/
|
|
function export_key($key, $fp = null)
|
|
{
|
|
$this->load_pgp_driver();
|
|
$result = $this->pgp_driver->export($key, $fp);
|
|
|
|
if ($result instanceof enigma_error) {
|
|
rcube::raise_error(array(
|
|
'code' => 600, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Enigma plugin: " . $result->getMessage()
|
|
), true, false);
|
|
|
|
return $result;
|
|
}
|
|
|
|
if ($fp) {
|
|
fwrite($fp, $result);
|
|
}
|
|
else {
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers password for specified key/cert sent by the password prompt.
|
|
*/
|
|
function password_handler()
|
|
{
|
|
$keyid = rcube_utils::get_input_value('_keyid', rcube_utils::INPUT_POST);
|
|
$passwd = rcube_utils::get_input_value('_passwd', rcube_utils::INPUT_POST, true);
|
|
|
|
if ($keyid && $passwd !== null && strlen($passwd)) {
|
|
$this->save_password($keyid, $passwd);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Saves key/cert password in user session
|
|
*/
|
|
function save_password($keyid, $password)
|
|
{
|
|
// we store passwords in session for specified time
|
|
if ($config = $_SESSION['enigma_pass']) {
|
|
$config = $this->rc->decrypt($config);
|
|
$config = @unserialize($config);
|
|
}
|
|
|
|
$config[$keyid] = array($password, time());
|
|
|
|
$_SESSION['enigma_pass'] = $this->rc->encrypt(serialize($config));
|
|
}
|
|
|
|
/**
|
|
* Returns currently stored passwords
|
|
*/
|
|
function get_passwords()
|
|
{
|
|
if ($config = $_SESSION['enigma_pass']) {
|
|
$config = $this->rc->decrypt($config);
|
|
$config = @unserialize($config);
|
|
}
|
|
|
|
$threshold = time() - $this->password_time;
|
|
$keys = array();
|
|
|
|
// delete expired passwords
|
|
foreach ((array) $config as $key => $value) {
|
|
if ($threshold && $value[1] < $threshold) {
|
|
unset($config[$key]);
|
|
$modified = true;
|
|
}
|
|
else {
|
|
$keys[$key] = $value[0];
|
|
}
|
|
}
|
|
|
|
if ($modified) {
|
|
$_SESSION['enigma_pass'] = $this->rc->encrypt(serialize($config));
|
|
}
|
|
|
|
return $keys;
|
|
}
|
|
|
|
/**
|
|
* Get message part body.
|
|
*
|
|
* @param rcube_message Message object
|
|
* @param string Message part ID
|
|
* @param bool Return raw body with headers
|
|
*/
|
|
private function get_part_body($msg, $part_id, $full = false)
|
|
{
|
|
// @TODO: Handle big bodies using file handles
|
|
if ($full) {
|
|
$storage = $this->rc->get_storage();
|
|
$body = $storage->get_raw_headers($msg->uid, $part_id);
|
|
$body .= $storage->get_raw_body($msg->uid, null, $part_id);
|
|
}
|
|
else {
|
|
$body = $msg->get_part_body($part_id, false);
|
|
}
|
|
|
|
return $body;
|
|
}
|
|
|
|
/**
|
|
* Parse decrypted message body into structure
|
|
*
|
|
* @param string Message body
|
|
*
|
|
* @return array Message structure
|
|
*/
|
|
private function parse_body(&$body)
|
|
{
|
|
// Mail_mimeDecode need \r\n end-line, but gpg may return \n
|
|
$body = preg_replace('/\r?\n/', "\r\n", $body);
|
|
|
|
// parse the body into structure
|
|
$struct = rcube_mime::parse_message($body);
|
|
|
|
return $struct;
|
|
}
|
|
|
|
/**
|
|
* Replace message encrypted structure with decrypted message structure
|
|
*
|
|
* @param array
|
|
* @param rcube_message_part
|
|
*/
|
|
private function modify_structure(&$p, $struct)
|
|
{
|
|
// modify mime_parts property of the message object
|
|
$old_id = $p['structure']->mime_id;
|
|
foreach (array_keys($p['object']->mime_parts) as $idx) {
|
|
if (!$old_id || $idx == $old_id || strpos($idx, $old_id . '.') === 0) {
|
|
unset($p['object']->mime_parts[$idx]);
|
|
}
|
|
}
|
|
|
|
// modify the new structure to be correctly handled by Roundcube
|
|
$this->modify_structure_part($struct, $p['object'], $old_id);
|
|
|
|
// replace old structure with the new one
|
|
$p['structure'] = $struct;
|
|
$p['mimetype'] = $struct->mimetype;
|
|
}
|
|
|
|
/**
|
|
* Modify decrypted message part
|
|
*
|
|
* @param rcube_message_part
|
|
* @param rcube_message
|
|
*/
|
|
private function modify_structure_part($part, $msg, $old_id)
|
|
{
|
|
// never cache the body
|
|
$part->body_modified = true;
|
|
$part->encoding = 'stream';
|
|
|
|
// modify part identifier
|
|
if ($old_id) {
|
|
$part->mime_id = !$part->mime_id ? $old_id : ($old_id . '.' . $part->mime_id);
|
|
}
|
|
|
|
// Cache the fact it was decrypted
|
|
$this->encrypted_parts[] = $part->mime_id;
|
|
|
|
$msg->mime_parts[$part->mime_id] = $part;
|
|
|
|
// modify sub-parts
|
|
foreach ((array) $part->parts as $p) {
|
|
$this->modify_structure_part($p, $msg, $old_id);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks if specified message part is a PGP-key or S/MIME cert data
|
|
*
|
|
* @param rcube_message_part Part object
|
|
*
|
|
* @return boolean True if part is a key/cert
|
|
*/
|
|
public function is_keys_part($part)
|
|
{
|
|
// @TODO: S/MIME
|
|
return (
|
|
// Content-Type: application/pgp-keys
|
|
$part->mimetype == 'application/pgp-keys'
|
|
);
|
|
}
|
|
}
|