enigma_ui.php
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enigma_ui.php
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	<?php

	/**
	+-------------------------------------------------------------------------+
	\| User Interface for the Enigma Plugin \|
	\| \|
	\| Copyright (C) The Roundcube Dev Team \|
	\| \|
	\| Licensed under the GNU General Public License version 3 or \|
	\| any later version with exceptions for skins & plugins. \|
	\| See the README file for a full license statement. \|
	+-------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <alec@alec.pl> \|
	+-------------------------------------------------------------------------+
	*/

	class enigma_ui
	{
	private $rc;
	private $enigma;
	private $home;
	private $css_loaded;
	private $js_loaded;
	private $data;
	private $keys_parts = array();
	private $keys_bodies = array();


	function __construct($enigma_plugin, $home='')
	{
	$this->enigma = $enigma_plugin;
	$this->rc = $enigma_plugin->rc;
	$this->home = $home; // we cannot use $enigma_plugin->home here
	}

	/**
	* UI initialization and requests handlers.
	*
	* @param string Preferences section
	*/
	function init()
	{
	$this->add_js();

	$action = rcube_utils::get_input_value('_a', rcube_utils::INPUT_GPC);

	if ($this->rc->action == 'plugin.enigmakeys') {
	switch ($action) {
	case 'delete':
	$this->key_delete();
	break;
	/*
	case 'edit':
	$this->key_edit();
	break;
	*/
	case 'import':
	$this->key_import();
	break;

	case 'import-search':
	$this->key_import_search();
	break;

	case 'export':
	$this->key_export();
	break;

	case 'generate':
	$this->key_generate();
	break;

	case 'create':
	$this->key_create();
	break;

	case 'search':
	case 'list':
	$this->key_list();
	break;

	case 'info':
	$this->key_info();
	break;
	}

	$this->rc->output->add_handlers(array(
	'keyslist' => array($this, 'tpl_keys_list'),
	'countdisplay' => array($this, 'tpl_keys_rowcount'),
	'searchform' => array($this->rc->output, 'search_form'),
	));

	$this->rc->output->set_pagetitle($this->enigma->gettext('enigmakeys'));
	$this->rc->output->send('enigma.keys');
	}
	/*
	// Preferences UI
	else if ($this->rc->action == 'plugin.enigmacerts') {
	$this->rc->output->add_handlers(array(
	'keyslist' => array($this, 'tpl_certs_list'),
	'keyframe' => array($this, 'tpl_cert_frame'),
	'countdisplay' => array($this, 'tpl_certs_rowcount'),
	'searchform' => array($this->rc->output, 'search_form'),
	));

	$this->rc->output->set_pagetitle($this->enigma->gettext('enigmacerts'));
	$this->rc->output->send('enigma.certs');
	}
	*/
	// Message composing UI
	else if ($this->rc->action == 'compose') {
	$this->compose_ui();
	}
	}

	/**
	* Adds CSS style file to the page header.
	*/
	function add_css()
	{
	if ($this->css_loaded) {
	return;
	}

	$skin_path = $this->enigma->local_skin_path();
	$this->enigma->include_stylesheet("$skin_path/enigma.css");
	$this->css_loaded = true;
	}

	/**
	* Adds javascript file to the page header.
	*/
	function add_js()
	{
	if ($this->js_loaded) {
	return;
	}

	$this->enigma->include_script('enigma.js');

	$this->rc->output->set_env('keyservers', $this->rc->config->keyservers());

	$this->js_loaded = true;
	}

	/**
	* Initializes key password prompt
	*
	* @param enigma_error $status Error object with key info
	* @param array $params Optional prompt parameters
	*/
	function password_prompt($status, $params = array())
	{
	$data = $status->getData('missing');

	if (empty($data)) {
	$data = $status->getData('bad');
	}

	$keyid = key($data);
	$data = array(
	'keyid' => $params['keyid'] ?: $keyid,
	'user' => $data[$keyid]
	);

	// With GnuPG 2.1 user name may not be specified (e.g. on private
	// key export), we'll get the key information and set the name appropriately
	if ($keyid && $params['keyid'] && strpos($data['user'], $keyid) !== false) {
	$key = $this->enigma->engine->get_key($params['keyid']);
	if ($key && $key->name) {
	$data['user'] = $key->name;
	}
	}

	if (!empty($params)) {
	$data = array_merge($params, $data);
	}

	if (preg_match('/^(send\|plugin.enigmaimport\|plugin.enigmakeys)$/', $this->rc->action)) {
	$this->rc->output->command('enigma_password_request', $data);
	}
	else {
	$this->rc->output->set_env('enigma_password_request', $data);
	}

	// add some labels to client
	$this->rc->output->add_label('enigma.enterkeypasstitle', 'enigma.enterkeypass',
	'save', 'cancel');

	$this->add_css();
	$this->add_js();
	}

	/**
	* Template object for list of keys.
	*
	* @param array Object attributes
	*
	* @return string HTML content
	*/
	function tpl_keys_list($attrib)
	{
	// add id to message list table if not specified
	if (!strlen($attrib['id'])) {
	$attrib['id'] = 'rcmenigmakeyslist';
	}

	// define list of cols to be displayed
	$a_show_cols = array('name');

	// create XHTML table
	$out = $this->rc->table_output($attrib, array(), $a_show_cols, 'id');

	// set client env
	$this->rc->output->add_gui_object('keyslist', $attrib['id']);
	$this->rc->output->include_script('list.js');

	// add some labels to client
	$this->rc->output->add_label('enigma.keyremoveconfirm', 'enigma.keyremoving',
	'enigma.keyexportprompt', 'enigma.withprivkeys', 'enigma.onlypubkeys',
	'enigma.exportkeys', 'enigma.importkeys', 'enigma.keyimportsearchlabel',
	'import', 'search'
	);

	return $out;
	}

	/**
	* Key listing (and searching) request handler
	*/
	private function key_list()
	{
	$this->enigma->load_engine();

	$pagesize = $this->rc->config->get('pagesize', 100);
	$page = max(intval(rcube_utils::get_input_value('_p', rcube_utils::INPUT_GPC)), 1);
	$search = rcube_utils::get_input_value('_q', rcube_utils::INPUT_GPC);

	// Get the list
	$list = $this->enigma->engine->list_keys($search);

	if ($list && ($list instanceof enigma_error))
	$this->rc->output->show_message('enigma.keylisterror', 'error');
	else if (empty($list))
	$this->rc->output->show_message('enigma.nokeysfound', 'notice');
	else if (is_array($list)) {
	// Save the size
	$listsize = count($list);

	// Sort the list by key (user) name
	usort($list, array('enigma_key', 'cmp'));

	// Slice current page
	$list = array_slice($list, ($page - 1) * $pagesize, $pagesize);
	$size = count($list);

	// Add rows
	foreach ($list as $key) {
	$this->rc->output->command('enigma_add_list_row', array(
	'name' => rcube::Q($key->name),
	'id' => $key->id,
	'flags' => $key->is_private() ? 'p' : ''
	));
	}
	}

	$this->rc->output->set_env('rowcount', $size);
	$this->rc->output->set_env('search_request', $search);
	$this->rc->output->set_env('pagecount', ceil($listsize/$pagesize));
	$this->rc->output->set_env('current_page', $page);
	$this->rc->output->command('set_rowcount',
	$this->get_rowcount_text($listsize, $size, $page));

	$this->rc->output->send();
	}

	/**
	* Template object for list records counter.
	*
	* @param array Object attributes
	*
	* @return string HTML output
	*/
	function tpl_keys_rowcount($attrib)
	{
	if (!$attrib['id'])
	$attrib['id'] = 'rcmcountdisplay';

	$this->rc->output->add_gui_object('countdisplay', $attrib['id']);

	return html::span($attrib, $this->get_rowcount_text());
	}

	/**
	* Returns text representation of list records counter
	*/
	private function get_rowcount_text($all=0, $curr_count=0, $page=1)
	{
	if (!$curr_count) {
	$out = $this->enigma->gettext('nokeysfound');
	}
	else {
	$pagesize = $this->rc->config->get('pagesize', 100);
	$first = ($page - 1) * $pagesize;

	$out = $this->enigma->gettext(array(
	'name' => 'keysfromto',
	'vars' => array(
	'from' => $first + 1,
	'to' => $first + $curr_count,
	'count' => $all)
	));
	}

	return $out;
	}

	/**
	* Key information page handler
	*/
	private function key_info()
	{
	$this->enigma->load_engine();

	$id = rcube_utils::get_input_value('_id', rcube_utils::INPUT_GET);
	$res = $this->enigma->engine->get_key($id);

	if ($res instanceof enigma_key) {
	$this->data = $res;
	}
	else { // error
	$this->rc->output->show_message('enigma.keyopenerror', 'error');
	$this->rc->output->command('parent.enigma_loadframe');
	$this->rc->output->send('iframe');
	}

	$this->rc->output->add_handlers(array(
	'keyname' => array($this, 'tpl_key_name'),
	'keydata' => array($this, 'tpl_key_data'),
	));

	$this->rc->output->set_pagetitle($this->enigma->gettext('keyinfo'));
	$this->rc->output->send('enigma.keyinfo');
	}

	/**
	* Template object for key name
	*/
	function tpl_key_name($attrib)
	{
	return rcube::Q($this->data->name);
	}

	/**
	* Template object for key information page content
	*/
	function tpl_key_data($attrib)
	{
	$out = '';
	$table = new html_table(array('cols' => 2));

	// Key user ID
	$table->add('title', html::label(null, $this->enigma->gettext('keyuserid')));
	$table->add(null, rcube::Q($this->data->name));

	// Key ID
	$table->add('title', html::label(null, $this->enigma->gettext('keyid')));
	$table->add(null, $this->data->subkeys[0]->get_short_id());

	// Key type
	$keytype = $this->data->get_type();
	if ($keytype == enigma_key::TYPE_KEYPAIR) {
	$type = $this->enigma->gettext('typekeypair');
	}
	else if ($keytype == enigma_key::TYPE_PUBLIC) {
	$type = $this->enigma->gettext('typepublickey');
	}
	$table->add('title', html::label(null, $this->enigma->gettext('keytype')));
	$table->add(null, $type);

	// Key fingerprint
	$table->add('title', html::label(null, $this->enigma->gettext('fingerprint')));
	$table->add(null, $this->data->subkeys[0]->get_fingerprint());

	$out .= html::tag('fieldset', null,
	html::tag('legend', null,
	$this->enigma->gettext('basicinfo')) . $table->show($attrib));

	// Subkeys
	$table = new html_table(array('cols' => 5, 'id' => 'enigmasubkeytable', 'class' => 'records-table'));

	$table->add_header('id', $this->enigma->gettext('subkeyid'));
	$table->add_header('algo', $this->enigma->gettext('subkeyalgo'));
	$table->add_header('created', $this->enigma->gettext('subkeycreated'));
	$table->add_header('expires', $this->enigma->gettext('subkeyexpires'));
	$table->add_header('usage', $this->enigma->gettext('subkeyusage'));

	$now = time();
	$date_format = $this->rc->config->get('date_format', 'Y-m-d');
	$usage_map = array(
	enigma_key::CAN_ENCRYPT => $this->enigma->gettext('typeencrypt'),
	enigma_key::CAN_SIGN => $this->enigma->gettext('typesign'),
	enigma_key::CAN_CERTIFY => $this->enigma->gettext('typecert'),
	enigma_key::CAN_AUTHENTICATE => $this->enigma->gettext('typeauth'),
	);

	foreach ($this->data->subkeys as $subkey) {
	$algo = $subkey->get_algorithm();
	if ($algo && $subkey->length) {
	$algo .= ' (' . $subkey->length . ')';
	}

	$usage = array();
	foreach ($usage_map as $key => $text) {
	if ($subkey->usage & $key) {
	$usage[] = $text;
	}
	}

	$table->set_row_attribs($subkey->revoked \|\| ($subkey->expires && $subkey->expires < $now) ? 'deleted' : '');
	$table->add('id', $subkey->get_short_id());
	$table->add('algo', $algo);
	$table->add('created', $subkey->created ? $this->rc->format_date($subkey->created, $date_format, false) : '');
	$table->add('expires', $subkey->expires ? $this->rc->format_date($subkey->expires, $date_format, false) : $this->enigma->gettext('expiresnever'));
	$table->add('usage', implode(',', $usage));
	}

	$out .= html::tag('fieldset', null,
	html::tag('legend', null,
	$this->enigma->gettext('subkeys')) . $table->show());

	// Additional user IDs
	$table = new html_table(array('cols' => 2, 'id' => 'enigmausertable', 'class' => 'records-table'));

	$table->add_header('id', $this->enigma->gettext('userid'));
	$table->add_header('valid', $this->enigma->gettext('uservalid'));

	foreach ($this->data->users as $user) {
	$username = $user->name;
	if ($user->comment) {
	$username .= ' (' . $user->comment . ')';
	}
	$username .= ' <' . $user->email . '>';

	$table->set_row_attribs($user->revoked \|\| !$user->valid ? 'deleted' : '');
	$table->add('id', rcube::Q(trim($username)));
	$table->add('valid', $this->enigma->gettext($user->valid ? 'valid' : 'unknown'));
	}

	$out .= html::tag('fieldset', null,
	html::tag('legend', null,
	$this->enigma->gettext('userids')) . $table->show());

	return $out;
	}

	/**
	* Key(s) export handler
	*/
	private function key_export()
	{
	$keys = rcube_utils::get_input_value('_keys', rcube_utils::INPUT_POST);
	$priv = rcube_utils::get_input_value('_priv', rcube_utils::INPUT_POST);
	$engine = $this->enigma->load_engine();
	$list = $keys == '*' ? $engine->list_keys() : explode(',', $keys);

	if (is_array($list) && ($fp = fopen('php://memory', 'rw'))) {
	$filename = 'export.pgp';
	if (count($list) == 1) {
	$filename = (is_object($list[0]) ? $list[0]->id : $list[0]) . '.pgp';
	}

	$status = null;
	foreach ($list as $key) {
	$keyid = is_object($key) ? $key->id : $key;
	$status = $engine->export_key($keyid, $fp, (bool) $priv);

	if ($status instanceof enigma_error) {
	$code = $status->getCode();

	if ($code == enigma_error::BADPASS) {
	$this->password_prompt($status, array(
	'input_keys' => $keys,
	'input_priv' => 1,
	'input_task' => 'settings',
	'input_action' => 'plugin.enigmakeys',
	'input_a' => 'export',
	'action' => '?',
	'iframe' => true,
	'nolock' => true,
	'keyid' => $keyid,
	));
	fclose($fp);
	$this->rc->output->send('iframe');
	}
	}
	}

	// send downlaod headers
	header('Content-Type: application/pgp-keys');
	header('Content-Disposition: attachment; filename="' . $filename . '"');

	rewind($fp);
	while (!feof($fp)) {
	echo fread($fp, 1024 * 1024);
	}
	fclose($fp);
	}

	exit;
	}

	/**
	* Key import (page) handler
	*/
	private function key_import()
	{
	// Import process
	if ($data = rcube_utils::get_input_value('_keys', rcube_utils::INPUT_POST)) {
	$this->enigma->load_engine();
	$this->enigma->engine->password_handler();

	$result = $this->enigma->engine->import_key($data);

	if (is_array($result)) {
	if (rcube_utils::get_input_value('_generated', rcube_utils::INPUT_POST)) {
	$this->rc->output->command('enigma_key_create_success');
	$this->rc->output->show_message('enigma.keygeneratesuccess', 'confirmation');
	}
	else {
	$this->rc->output->show_message('enigma.keysimportsuccess', 'confirmation',
	array('new' => $result['imported'], 'old' => $result['unchanged']));

	if ($result['imported'] && !empty($_POST['_refresh'])) {
	$this->rc->output->command('enigma_list', 1, false);
	}
	}
	}
	else {
	$this->rc->output->show_message('enigma.keysimportfailed', 'error');
	}

	$this->rc->output->send();
	}
	else if ($_FILES['_file']['tmp_name'] && is_uploaded_file($_FILES['_file']['tmp_name'])) {
	$this->enigma->load_engine();
	$result = $this->enigma->engine->import_key($_FILES['_file']['tmp_name'], true);

	if (is_array($result)) {
	// reload list if any keys has been added
	if ($result['imported']) {
	$this->rc->output->command('parent.enigma_list', 1);
	}

	$this->rc->output->show_message('enigma.keysimportsuccess', 'confirmation',
	array('new' => $result['imported'], 'old' => $result['unchanged']));

	$this->rc->output->command('parent.enigma_import_success');
	}
	else if ($result instanceof enigma_error && $result->getCode() == enigma_error::BADPASS) {
	$this->password_prompt($result);
	}
	else {
	$this->rc->output->show_message('enigma.keysimportfailed', 'error');
	}
	$this->rc->output->send('iframe');
	}
	else if ($err = $_FILES['_file']['error']) {
	if ($err == UPLOAD_ERR_INI_SIZE \|\| $err == UPLOAD_ERR_FORM_SIZE) {
	$this->rc->output->show_message('filesizeerror', 'error',
	array('size' => $this->rc->show_bytes(rcube_utils::max_upload_size())));
	} else {
	$this->rc->output->show_message('fileuploaderror', 'error');
	}

	$this->rc->output->send('iframe');
	}

	$this->rc->output->add_handlers(array(
	'importform' => array($this, 'tpl_key_import_form'),
	));

	$this->rc->output->send('enigma.keyimport');
	}

	/**
	* Key import-search (page) handler
	*/
	private function key_import_search()
	{
	$this->rc->output->add_handlers(array(
	'importform' => array($this, 'tpl_key_import_form'),
	));

	$this->rc->output->send('enigma.keysearch');
	}

	/**
	* Template object for key import (upload) form
	*/
	function tpl_key_import_form($attrib)
	{
	$attrib += array('id' => 'rcmKeyImportForm');

	if (empty($attrib['part']) \|\| $attrib['part'] == 'import') {
	$title = $this->enigma->gettext('keyimportlabel');
	$upload = new html_inputfield(array('type' => 'file', 'name' => '_file',
	'id' => 'rcmimportfile', 'size' => 30));

	$max_filesize = $this->rc->upload_init();
	$upload_button = new html_button(array(
	'class' => 'button import',
	'onclick' => "return rcmail.command('plugin.enigma-import','',this,event)",
	));

	$form = html::div(null, html::p(null, rcube::Q($this->enigma->gettext('keyimporttext'), 'show'))
	. $upload->show()
	. html::div('hint', $this->rc->gettext(array('id' => 'importfile', 'name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize))))
	. (empty($attrib['part']) ? html::br() . html::br() . $upload_button->show($this->rc->gettext('import')) : '')
	);

	if (empty($attrib['part'])) {
	$form = html::tag('fieldset', '', html::tag('legend', null, $title) . $form);
	}
	else {
	$this->rc->output->set_pagetitle($title);
	}
	}

	if (empty($attrib['part']) \|\| $attrib['part'] == 'search') {
	$title = $this->enigma->gettext('keyimportsearchlabel');
	$search = new html_inputfield(array('type' => 'text', 'name' => '_search',
	'id' => 'rcmimportsearch', 'size' => 30));

	$search_button = new html_button(array(
	'class' => 'button search',
	'onclick' => "return rcmail.command('plugin.enigma-import-search','',this,event)",
	));

	$form = html::div(null,
	rcube::Q($this->enigma->gettext('keyimportsearchtext'), 'show')
	. html::br() . html::br() . $search->show()
	. (empty($attrib['part']) ? html::br() . html::br() . $search_button->show($this->rc->gettext('search')) : '')
	);

	if (empty($attrib['part'])) {
	$form = html::tag('fieldset', '', html::tag('legend', null, $title) . $form);
	}
	else {
	$this->rc->output->set_pagetitle($title);
	}

	$this->rc->output->include_script('publickey.js');
	}

	$this->rc->output->add_label('selectimportfile', 'importwait', 'nopubkeyfor', 'nopubkeyforsender',
	'encryptnoattachments','encryptedsendialog','searchpubkeyservers', 'importpubkeys',
	'encryptpubkeysfound', 'search', 'close', 'import', 'keyid', 'keylength', 'keyexpired',
	'keyrevoked', 'keyimportsuccess', 'keyservererror');

	$this->rc->output->add_gui_object('importform', $attrib['id']);

	$out = $this->rc->output->form_tag(array(
	'action' => $this->rc->url(array('action' => $this->rc->action, 'a' => 'import')),
	'method' => 'post',
	'enctype' => 'multipart/form-data') + $attrib,
	$form
	);

	return $out;
	}

	/**
	* Server-side key pair generation handler
	*/
	private function key_generate()
	{
	// Crypt_GPG does not support key generation for multiple identities
	// It is also very slow (which is problematic because it may exceed
	// request time limit) and requires entropy generator
	// That's why we use only OpenPGP.js method of key generation
	return;

	$user = rcube_utils::get_input_value('_user', rcube_utils::INPUT_POST, true);
	$pass = rcube_utils::get_input_value('_password', rcube_utils::INPUT_POST, true);
	$size = (int) rcube_utils::get_input_value('_size', rcube_utils::INPUT_POST);

	if ($size > 4096) {
	$size = 4096;
	}

	$ident = rcube_mime::decode_address_list($user, 1, false);

	if (empty($ident)) {
	$this->rc->output->show_message('enigma.keygenerateerror', 'error');
	$this->rc->output->send();
	}

	$this->enigma->load_engine();
	$result = $this->enigma->engine->generate_key(array(
	'user' => $ident[1]['name'],
	'email' => $ident[1]['mailto'],
	'password' => $pass,
	'size' => $size,
	));

	if ($result instanceof enigma_key) {
	$this->rc->output->command('enigma_key_create_success');
	$this->rc->output->show_message('enigma.keygeneratesuccess', 'confirmation');
	}
	else {
	$this->rc->output->show_message('enigma.keygenerateerror', 'error');
	}

	$this->rc->output->send();
	}

	/**
	* Key generation page handler
	*/
	private function key_create()
	{
	$this->enigma->include_script('openpgp.min.js');

	$this->rc->output->add_handlers(array(
	'keyform' => array($this, 'tpl_key_create_form'),
	));

	$this->rc->output->set_pagetitle($this->enigma->gettext('keygenerate'));
	$this->rc->output->send('enigma.keycreate');
	}

	/**
	* Template object for key generation form
	*/
	function tpl_key_create_form($attrib)
	{
	$attrib += array('id' => 'rcmKeyCreateForm');
	$table = new html_table(array('cols' => 2));

	// get user's identities
	$identities = $this->rc->user->list_identities(null, true);
	$checkbox = new html_checkbox(array('name' => 'identity[]'));

	$plugin = $this->rc->plugins->exec_hook('enigma_user_identities', array('identities' => $identities));
	$identities = $plugin['identities'];

	foreach ($identities as $idx => $ident) {
	$name = empty($ident['name']) ? ($ident['email']) : $ident['ident'];
	$attr = array('value' => $idx, 'data-name' => $ident['name'], 'data-email' => $ident['email']);
	$identities[$idx] = html::tag('li', null, html::label(null, $checkbox->show($idx, $attr) . rcube::Q($name)));
	}

	$table->add('title', html::label('key-name', rcube::Q($this->enigma->gettext('newkeyident'))));
	$table->add(null, html::tag('ul', 'proplist', implode("\n", $identities)));

	// Key size
	$select = new html_select(array('name' => 'size', 'id' => 'key-size'));
	$select->add($this->enigma->gettext('key2048'), '2048');
	$select->add($this->enigma->gettext('key4096'), '4096');

	$table->add('title', html::label('key-size', rcube::Q($this->enigma->gettext('newkeysize'))));
	$table->add(null, $select->show());

	// Password and confirm password
	$table->add('title', html::label('key-pass', rcube::Q($this->enigma->gettext('newkeypass'))));
	$table->add(null, rcube_output::get_edit_field('password', '', array(
	'id' => 'key-pass',
	'size' => $attrib['size'],
	'required' => true,
	'autocomplete' => 'new-password',
	'oninput' => "this.type = this.value.length ? 'password' : 'text'",
	), 'text'));

	$table->add('title', html::label('key-pass-confirm', rcube::Q($this->enigma->gettext('newkeypassconfirm'))));
	$table->add(null, rcube_output::get_edit_field('password-confirm', '', array(
	'id' => 'key-pass-confirm',
	'size' => $attrib['size'],
	'required' => true,
	'autocomplete' => 'new-password',
	'oninput' => "this.type = this.value.length ? 'password' : 'text'",
	), 'text'));

	$this->rc->output->add_gui_object('keyform', $attrib['id']);
	$this->rc->output->add_label('enigma.keygenerating', 'enigma.formerror',
	'enigma.passwordsdiffer', 'enigma.keygenerateerror', 'enigma.noidentselected',
	'enigma.keygennosupport');

	return $this->rc->output->form_tag(array(), $table->show($attrib));
	}

	/**
	* Key deleting
	*/
	private function key_delete()
	{
	$keys = rcube_utils::get_input_value('_keys', rcube_utils::INPUT_POST);
	$engine = $this->enigma->load_engine();

	foreach ((array)$keys as $key) {
	$res = $engine->delete_key($key);

	if ($res !== true) {
	$this->rc->output->show_message('enigma.keyremoveerror', 'error');
	$this->rc->output->command('enigma_list');
	$this->rc->output->send();
	}
	}

	$this->rc->output->command('enigma_list');
	$this->rc->output->show_message('enigma.keyremovesuccess', 'confirmation');
	$this->rc->output->send();
	}

	/**
	* Init compose UI (add task button and the menu)
	*/
	private function compose_ui()
	{
	$this->add_css();
	$this->rc->output->add_label('enigma.sendunencrypted');

	// Elastic skin (or a skin based on it)
	if (array_key_exists('elastic', (array) $this->rc->output->skins)) {
	$this->enigma->api->add_content($this->compose_ui_options(), 'composeoptions');
	}
	// other skins
	else {
	// Options menu button
	$this->enigma->add_button(array(
	'type' => 'link',
	'command' => 'plugin.enigma',
	'onclick' => "rcmail.command('menu-open', 'enigmamenu', event.target, event)",
	'class' => 'button enigma',
	'title' => 'encryptionoptions',
	'label' => 'encryption',
	'domain' => $this->enigma->ID,
	'width' => 32,
	'height' => 32,
	'aria-owns' => 'enigmamenu',
	'aria-haspopup' => 'true',
	'aria-expanded' => 'false',
	), 'toolbar');

	// Options menu contents
	$this->rc->output->add_footer($this->compose_ui_options(true));
	}
	}

	/**
	* Init compose UI (add task button and the menu)
	*/
	private function compose_ui_options($wrap = false)
	{
	$locks = (array) $this->rc->config->get('enigma_options_lock');
	$chbox = new html_checkbox(array('value' => 1));

	$out = html::div('form-group form-check row',
	html::label(array('for' => 'enigmasignopt', 'class' => 'col-form-label col-6'),
	rcube::Q($this->enigma->gettext('signmsg')))
	. html::div('form-check col-6',
	$chbox->show($this->rc->config->get('enigma_sign_all') ? 1 : 0, array(
	'name' => '_enigma_sign',
	'id' => 'enigmasignopt',
	'class' => 'form-check-input',
	'disabled' => in_array('sign', $locks),
	))));

	$out .= html::div('form-group form-check row',
	html::label(array('for' => 'enigmaencryptopt', 'class' => 'col-form-label col-6'),
	rcube::Q($this->enigma->gettext('encryptmsg')))
	. html::div('form-check col-6',
	$chbox->show($this->rc->config->get('enigma_encrypt_all') ? 1 : 0, array(
	'name' => '_enigma_encrypt',
	'id' => 'enigmaencryptopt',
	'class' => 'form-check-input',
	'disabled' => in_array('encrypt', $locks),
	))));

	$out .= html::div('form-group form-check row',
	html::label(array('for' => 'enigmaattachpubkeyopt', 'class' => 'col-form-label col-6'),
	rcube::Q($this->enigma->gettext('attachpubkeymsg')))
	. html::div('form-check col-6',
	$chbox->show($this->rc->config->get('enigma_attach_pubkey') ? 1 : 0, array(
	'name' => '_enigma_attachpubkey',
	'id' => 'enigmaattachpubkeyopt',
	'class' => 'form-check-input',
	'disabled' => in_array('pubkey', $locks),
	))));

	if (!$wrap) {
	return $out;
	}

	return html::div(array('id' => 'enigmamenu', 'class' => 'popupmenu'), $out);
	}

	/**
	* Handler for message_body_prefix hook.
	* Called for every displayed (content) part of the message.
	* Adds infobox about signature verification and/or decryption
	* status above the body.
	*
	* @param array Original parameters
	*
	* @return array Modified parameters
	*/
	function status_message($p)
	{
	// skip: not a message part
	if ($p['part'] instanceof rcube_message) {
	return $p;
	}

	// skip: message has no signed/encoded content
	if (!$this->enigma->engine) {
	return $p;
	}

	$engine = $this->enigma->engine;
	$part_id = $p['part']->mime_id;
	$messages = array();

	// Decryption status
	if (($found = $this->find_part_id($part_id, $engine->decryptions)) !== null
	&& ($status = $engine->decryptions[$found])
	) {
	$attach_scripts = true;

	// show the message only once
	unset($engine->decryptions[$found]);

	// display status info
	$attrib['id'] = 'enigma-message';

	if ($status instanceof enigma_error) {
	$attrib['class'] = 'boxerror enigmaerror encrypted';
	$code = $status->getCode();

	if ($code == enigma_error::KEYNOTFOUND) {
	$msg = rcube::Q(str_replace('$keyid', enigma_key::format_id($status->getData('id')),
	$this->enigma->gettext('decryptnokey')));
	}
	else if ($code == enigma_error::BADPASS) {
	$missing = $status->getData('missing');
	$label = 'decrypt' . (!empty($missing) ? 'no' : 'bad') . 'pass';
	$msg = rcube::Q($this->enigma->gettext($label));
	$this->password_prompt($status);
	}
	else if ($code == enigma_error::NOMDC) {
	$msg = rcube::Q($this->enigma->gettext('decryptnomdc'));
	}
	else {
	$msg = rcube::Q($this->enigma->gettext('decrypterror'));
	}
	}
	else if ($status === enigma_engine::ENCRYPTED_PARTIALLY) {
	$attrib['class'] = 'boxwarning enigmawarning encrypted';
	$msg = rcube::Q($this->enigma->gettext('decryptpartial'));
	}
	else {
	$attrib['class'] = 'boxconfirmation enigmanotice encrypted';
	$msg = rcube::Q($this->enigma->gettext('decryptok'));
	}

	$attrib['msg'] = $msg;
	$messages[] = $attrib;
	}

	// Signature verification status
	if (($found = $this->find_part_id($part_id, $engine->signatures)) !== null
	&& ($sig = $engine->signatures[$found])
	) {
	$attach_scripts = true;

	// show the message only once
	unset($engine->signatures[$found]);

	// display status info
	$attrib['id'] = 'enigma-message';

	if ($sig instanceof enigma_signature) {
	$sender = $sig->get_sender($engine, $p['message'], $part_id);

	if ($sig->valid === enigma_error::UNVERIFIED) {
	$attrib['class'] = 'boxwarning enigmawarning signed';
	$msg = str_replace('$sender', $sender, $this->enigma->gettext('sigunverified'));
	$msg = str_replace('$keyid', $sig->id, $msg);
	$msg = rcube::Q($msg);
	}
	else if ($sig->valid) {
	$attrib['class'] = ($sig->partial ? 'boxwarning enigmawarning' : 'boxconfirmation enigmanotice') . ' signed';
	$label = 'sigvalid' . ($sig->partial ? 'partial' : '');
	$msg = rcube::Q(str_replace('$sender', $sender, $this->enigma->gettext($label)));
	}
	else {
	$attrib['class'] = 'boxwarning enigmawarning signed';
	if ($sender) {
	$msg = rcube::Q(str_replace('$sender', $sender, $this->enigma->gettext('siginvalid')));
	}
	else {
	$msg = rcube::Q(str_replace('$keyid', enigma_key::format_id($sig->id),
	$this->enigma->gettext('signokey')));
	}
	}
	}
	else if ($sig && $sig->getCode() == enigma_error::KEYNOTFOUND) {
	$attrib['class'] = 'boxwarning enigmawarning signed';
	$msg = rcube::Q(str_replace('$keyid', enigma_key::format_id($sig->getData('id')),
	$this->enigma->gettext('signokey')));
	}
	else {
	$attrib['class'] = 'boxwarning enigmaerror signed';
	$msg = rcube::Q($this->enigma->gettext('sigerror'));
	}
	/*
	$msg .= ' ' . html::a(array('href' => "#sigdetails",
	'onclick' => rcmail_output::JS_OBJECT_NAME.".command('enigma-sig-details')"),
	rcube::Q($this->enigma->gettext('showdetails')));
	*/
	// test
	// $msg .= '<br /><pre>'.$sig->body.'</pre>';

	$attrib['msg'] = $msg;
	$messages[] = $attrib;
	}

	if ($count = count($messages)) {
	if ($count == 2 && $messages[0]['class'] == $messages[1]['class']) {
	$p['prefix'] .= html::div($messages[0], $messages[0]['msg'] . ' ' . $messages[1]['msg']);
	}
	else {
	foreach ($messages as $msg) {
	$p['prefix'] .= html::div($msg, $msg['msg']);
	}
	}
	}

	if ($attach_scripts) {
	// add css and js script
	$this->add_css();
	$this->add_js();
	}

	return $p;
	}

	/**
	* Handler for message_load hook.
	* Check message bodies and attachments for keys/certs.
	*/
	function message_load($p)
	{
	$engine = $this->enigma->load_engine();

	// handle keys/certs in attachments
	foreach ((array) $p['object']->attachments as $attachment) {
	if ($engine->is_keys_part($attachment)) {
	$this->keys_parts[] = $attachment->mime_id;
	}
	}

	// the same with message bodies
	foreach ((array) $p['object']->parts as $part) {
	if ($engine->is_keys_part($part)) {
	$this->keys_parts[] = $part->mime_id;
	$this->keys_bodies[] = $part->mime_id;
	}
	}

	// @TODO: inline PGP keys

	if ($this->keys_parts) {
	$this->enigma->add_texts('localization');
	}

	return $p;
	}

	/**
	* Handler for template_object_messagebody hook.
	* This callback function adds a box below the message content
	* if there is a key/cert attachment available
	*/
	function message_output($p)
	{
	foreach ($this->keys_parts as $part) {
	// remove part's body
	if (in_array($part, $this->keys_bodies)) {
	$p['content'] = '';
	}

	// add box above the message body
	$p['content'] = html::p(array('class' => 'enigmaattachment boxinformation aligned-buttons'),
	html::span(null, rcube::Q($this->enigma->gettext('keyattfound'))) .
	html::tag('button', array(
	'onclick' => "return ".rcmail_output::JS_OBJECT_NAME.".enigma_import_attachment('".rcube::JQ($part)."')",
	'title' => $this->enigma->gettext('keyattimport'),
	'class' => 'import',
	), rcube::Q($this->rc->gettext('import')))
	) . $p['content'];

	$attach_scripts = true;
	}

	if ($attach_scripts) {
	// add css and js script
	$this->add_css();
	$this->add_js();
	}

	return $p;
	}

	/**
	* Handle message_ready hook (encryption/signing/attach public key)
	*/
	function message_ready($p)
	{
	// The message might have been already encrypted by Mailvelope
	if (strpos($p['message']->getParam('ctype'), 'multipart/encrypted') === 0) {
	return $p;
	}

	$savedraft = !empty($_POST['_draft']) && empty($_GET['_saveonly']);
	$sign_enable = (bool) rcube_utils::get_input_value('_enigma_sign', rcube_utils::INPUT_POST);
	$encrypt_enable = (bool) rcube_utils::get_input_value('_enigma_encrypt', rcube_utils::INPUT_POST);
	$pubkey_enable = (bool) rcube_utils::get_input_value('_enigma_attachpubkey', rcube_utils::INPUT_POST);
	$locks = (array) $this->rc->config->get('enigma_options_lock');

	if (in_array('sign', $locks)) {
	$sign_enable = (bool) $this->rc->config->get('enigma_sign_all');
	}
	if (in_array('encrypt', $locks)) {
	$encrypt_enable = (bool) $this->rc->config->get('enigma_encrypt_all');
	}
	if (in_array('pubkey', $locks)) {
	$pubkey_enable = (bool) $this->rc->config->get('enigma_attach_pubkey');
	}

	if (!$savedraft && $pubkey_enable) {
	$engine = $this->enigma->load_engine();
	$engine->attach_public_key($p['message']);
	}

	if ($encrypt_enable) {
	$engine = $this->enigma->load_engine();
	$mode = !$savedraft && $sign_enable ? enigma_engine::ENCRYPT_MODE_SIGN : null;
	$status = $engine->encrypt_message($p['message'], $mode, $savedraft);
	$mode = 'encrypt';
	}
	else if (!$savedraft && $sign_enable) {
	$engine = $this->enigma->load_engine();
	$status = $engine->sign_message($p['message'], enigma_engine::SIGN_MODE_MIME);
	$mode = 'sign';
	}

	if ($mode && ($status instanceof enigma_error)) {
	$code = $status->getCode();
	if ($code == enigma_error::KEYNOTFOUND) {
	if ($email = $status->getData('missing')) {
	$vars = array('email' => $email);
	$msg = 'enigma.' . $mode . 'nokey';
	}
	else {
	$msg = 'enigma.' . ($encrypt_enable ? 'encryptnoprivkey' : 'signnokey');
	}
	}
	else if ($code == enigma_error::BADPASS) {
	$this->password_prompt($status);
	}
	else {
	$msg = 'enigma.' . $mode . 'error';
	}

	if ($msg) {
	if ($vars && $vars['email']) {
	$this->rc->output->command('enigma_key_not_found', array(
	'email' => $vars['email'],
	'text' => $this->rc->gettext(array('name' => $msg, 'vars' => $vars)),
	'title' => $this->enigma->gettext('keynotfound'),
	'button' => $this->enigma->gettext('findkey'),
	'mode' => $mode,
	));
	}
	else {
	$this->rc->output->show_message($msg, 'error', $vars);
	}
	}

	$this->rc->output->send('iframe');
	}

	return $p;
	}

	/**
	* Handler for message_compose_body hook
	* Display error when the message cannot be encrypted
	* and provide a way to try again with a password.
	*/
	function message_compose($p)
	{
	$engine = $this->enigma->load_engine();

	// skip: message has no signed/encoded content
	if (!$this->enigma->engine) {
	return $p;
	}

	$engine = $this->enigma->engine;
	$locks = (array) $this->rc->config->get('enigma_options_lock');

	// Decryption status
	foreach ($engine->decryptions as $status) {
	if ($status instanceof enigma_error) {
	$code = $status->getCode();

	if ($code == enigma_error::KEYNOTFOUND) {
	$msg = rcube::Q(str_replace('$keyid', enigma_key::format_id($status->getData('id')),
	$this->enigma->gettext('decryptnokey')));
	}
	else if ($code == enigma_error::BADPASS) {
	$this->password_prompt($status, array('compose-init' => true));
	return $p;
	}
	else {
	$msg = rcube::Q($this->enigma->gettext('decrypterror'));
	}
	}
	}

	if ($msg) {
	$this->rc->output->show_message($msg, 'error');
	}

	// Check sign/ecrypt options for signed/encrypted drafts
	if (!in_array('encrypt', $locks)) {
	$this->rc->output->set_env('enigma_force_encrypt', !empty($engine->decryptions));
	}
	if (!in_array('sign', $locks)) {
	$this->rc->output->set_env('enigma_force_sign', !empty($engine->signatures));
	}

	return $p;
	}

	/**
	* 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);
	$engine = $this->enigma->load_engine();

	if ($uid && $mime_id) {
	// Note: we get the attachment body via rcube_message class
	// to support keys inside encrypted messages (#5285)
	$message = new rcube_message($uid, $mbox);

	// Check if we don't need to ask for password again
	foreach ($engine->decryptions as $status) {
	if ($status instanceof enigma_error) {
	if ($status->getCode() == enigma_error::BADPASS) {
	$this->password_prompt($status, array(
	'input_uid' => $uid,
	'input_mbox' => $mbox,
	'input_part' => $mime_id,
	'input_task' => 'mail',
	'input_action' => 'plugin.enigmaimport',
	'action' => '?',
	'iframe' => true,
	));
	$this->rc->output->send($this->rc->output->type == 'html' ? 'iframe' : null);
	return;
	}
	}
	}

	if ($engine->is_keys_part($message->mime_parts[$mime_id])) {
	$part = $message->get_part_body($mime_id);
	}
	}

	if ($part && is_array($result = $engine->import_key($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');
	}

	$this->rc->output->send($this->rc->output->type == 'html' ? 'iframe' : null);
	}

	/**
	* Check if the part or its parent exists in the array
	* of decryptions/signatures. Returns found ID.
	*/
	private function find_part_id($part_id, $data)
	{
	$ids = explode('.', $part_id);
	$i = 0;
	$count = count($ids);

	while ($i < $count && strlen($part = implode('.', array_slice($ids, 0, ++$i)))) {
	if (array_key_exists($part, $data)) {
	return $part;
	}
	}
	}
	}

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