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<?php
/**
* Folders Access Control Lists Management (RFC4314, RFC2086)
*
* @version @package_version@
* @author Aleksander Machniak <alec@alec.pl>
*
*
* Copyright (C) 2011-2012, Kolab Systems AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
class acl extends rcube_plugin
{
public $task = 'settings|addressbook|calendar';
private $rc;
private $supported = null;
private $mbox;
private $ldap;
private $specials = array('anyone', 'anonymous');
/**
* Plugin initialization
*/
function init()
{
$this->rc = rcmail::get_instance();
// Register hooks
$this->add_hook('folder_form', array($this, 'folder_form'));
// kolab_addressbook plugin
$this->add_hook('addressbook_form', array($this, 'folder_form'));
$this->add_hook('calendar_form_kolab', array($this, 'folder_form'));
// Plugin actions
$this->register_action('plugin.acl', array($this, 'acl_actions'));
$this->register_action('plugin.acl-autocomplete', array($this, 'acl_autocomplete'));
}
/**
* Handler for plugin actions (AJAX)
*/
function acl_actions()
{
$action = trim(get_input_value('_act', RCUBE_INPUT_GPC));
// Connect to IMAP
$this->rc->storage_init();
// Load localization and configuration
$this->add_texts('localization/');
$this->load_config();
if ($action == 'save') {
$this->action_save();
}
else if ($action == 'delete') {
$this->action_delete();
}
else if ($action == 'list') {
$this->action_list();
}
// Only AJAX actions
$this->rc->output->send();
}
/**
* Handler for user login autocomplete request
*/
function acl_autocomplete()
{
$this->load_config();
$search = get_input_value('_search', RCUBE_INPUT_GPC, true);
$sid = get_input_value('_id', RCUBE_INPUT_GPC);
$users = array();
if ($this->init_ldap()) {
$max = (int) $this->rc->config->get('autocomplete_max', 15);
$mode = (int) $this->rc->config->get('addressbook_search_mode');
$this->ldap->set_pagesize($max);
$result = $this->ldap->search('*', $search, $mode);
foreach ($result->records as $record) {
$user = $record['uid'];
if (is_array($user)) {
$user = array_filter($user);
$user = $user[0];
}
if ($user) {
if ($record['name'])
$user = $record['name'] . ' (' . $user . ')';
$users[] = $user;
}
}
}
sort($users, SORT_LOCALE_STRING);
$this->rc->output->command('ksearch_query_results', $users, $search, $sid);
$this->rc->output->send();
}
/**
* Handler for 'folder_form' hook
*
* @param array $args Hook arguments array (form data)
*
* @return array Hook arguments array
*/
function folder_form($args)
{
$mbox_imap = $args['options']['name'];
$myrights = $args['options']['rights'];
// Edited folder name (empty in create-folder mode)
if (!strlen($mbox_imap)) {
return $args;
}
/*
// Do nothing on protected folders (?)
if ($args['options']['protected']) {
return $args;
}
*/
// Get MYRIGHTS
if (empty($myrights)) {
return $args;
}
// Load localization and include scripts
$this->load_config();
$this->add_texts('localization/', array('deleteconfirm', 'norights',
'nouser', 'deleting', 'saving'));
$this->include_script('acl.js');
$this->rc->output->include_script('list.js');
$this->include_stylesheet($this->local_skin_path().'/acl.css');
// add Info fieldset if it doesn't exist
if (!isset($args['form']['props']['fieldsets']['info']))
$args['form']['props']['fieldsets']['info'] = array(
'name' => rcube_label('info'),
'content' => array());
// Display folder rights to 'Info' fieldset
$args['form']['props']['fieldsets']['info']['content']['myrights'] = array(
'label' => Q($this->gettext('myrights')),
'value' => $this->acl2text($myrights)
);
// Return if not folder admin
if (!in_array('a', $myrights)) {
return $args;
}
// The 'Sharing' tab
$this->mbox = $mbox_imap;
$this->rc->output->set_env('acl_users_source', (bool) $this->rc->config->get('acl_users_source'));
$this->rc->output->set_env('mailbox', $mbox_imap);
$this->rc->output->add_handlers(array(
'acltable' => array($this, 'templ_table'),
'acluser' => array($this, 'templ_user'),
'aclrights' => array($this, 'templ_rights'),
));
$this->rc->output->set_env('autocomplete_max', (int)$this->rc->config->get('autocomplete_max', 15));
$this->rc->output->set_env('autocomplete_min_length', $this->rc->config->get('autocomplete_min_length'));
$this->rc->output->add_label('autocompletechars', 'autocompletemore');
$args['form']['sharing'] = array(
'name' => Q($this->gettext('sharing')),
'content' => $this->rc->output->parse('acl.table', false, false),
);
return $args;
}
/**
* Creates ACL rights table
*
* @param array $attrib Template object attributes
*
* @return string HTML Content
*/
function templ_table($attrib)
{
if (empty($attrib['id']))
$attrib['id'] = 'acl-table';
$out = $this->list_rights($attrib);
$this->rc->output->add_gui_object('acltable', $attrib['id']);
return $out;
}
/**
* Creates ACL rights form (rights list part)
*
* @param array $attrib Template object attributes
*
* @return string HTML Content
*/
function templ_rights($attrib)
{
// Get supported rights
$supported = $this->rights_supported();
// depending on server capability either use 'te' or 'd' for deleting msgs
$deleteright = implode(array_intersect(str_split('ted'), $supported));
$out = '';
$ul = '';
$input = new html_checkbox();
// Advanced rights
$attrib['id'] = 'advancedrights';
foreach ($supported as $idx => $val) {
$ul .= html::tag('li', null,
$input->show('', array(
'name' => "acl[$val]", 'value' => $val, 'id' => $id))
. html::label(array('for' => $id, 'title' => $this->gettext('longacl'.$val)),
$this->gettext('acl'.$val)));
}
$out = html::tag('ul', $attrib, $ul, html::$common_attrib);
// Simple rights
$ul = '';
$attrib['id'] = 'simplerights';
$items = array(
'read' => 'lrs',
'write' => 'wi',
'delete' => $deleteright,
'other' => preg_replace('/[lrswi'.$deleteright.']/', '', implode($supported)),
);
foreach ($items as $key => $val) {
$id = "acl$key";
$ul .= html::tag('li', null,
$input->show('', array(
'name' => "acl[$val]", 'value' => $val, 'id' => $id))
. html::label(array('for' => $id, 'title' => $this->gettext('longacl'.$key)),
$this->gettext('acl'.$key)));
}
$out .= "\n" . html::tag('ul', $attrib, $ul, html::$common_attrib);
$this->rc->output->set_env('acl_items', $items);
return $out;
}
/**
* Creates ACL rights form (user part)
*
* @param array $attrib Template object attributes
*
* @return string HTML Content
*/
function templ_user($attrib)
{
// Create username input
$attrib['name'] = 'acluser';
$textfield = new html_inputfield($attrib);
$fields['user'] = html::label(array('for' => 'iduser'), $this->gettext('username'))
. ' ' . $textfield->show();
// Add special entries
if (!empty($this->specials)) {
foreach ($this->specials as $key) {
$fields[$key] = html::label(array('for' => 'id'.$key), $this->gettext($key));
}
}
$this->rc->output->set_env('acl_specials', $this->specials);
// Create list with radio buttons
if (count($fields) > 1) {
$ul = '';
$radio = new html_radiobutton(array('name' => 'usertype'));
foreach ($fields as $key => $val) {
$ul .= html::tag('li', null, $radio->show($key == 'user' ? 'user' : '',
array('value' => $key, 'id' => 'id'.$key))
. $val);
}
$out = html::tag('ul', array('id' => 'usertype'), $ul, html::$common_attrib);
}
// Display text input alone
else {
$out = $fields['user'];
}
return $out;
}
/**
* Creates ACL rights table
*
* @param array $attrib Template object attributes
*
* @return string HTML Content
*/
private function list_rights($attrib=array())
{
// Get ACL for the folder
$acl = $this->rc->storage->get_acl($this->mbox);
if (!is_array($acl)) {
$acl = array();
}
// Keep special entries (anyone/anonymous) on top of the list
if (!empty($this->specials) && !empty($acl)) {
foreach ($this->specials as $key) {
if (isset($acl[$key])) {
$acl_special[$key] = $acl[$key];
unset($acl[$key]);
}
}
}
// Sort the list by username
uksort($acl, 'strnatcasecmp');
if (!empty($acl_special)) {
$acl = array_merge($acl_special, $acl);
}
// Get supported rights and build column names
$supported = $this->rights_supported();
// depending on server capability either use 'te' or 'd' for deleting msgs
$deleteright = implode(array_intersect(str_split('ted'), $supported));
// Use advanced or simple (grouped) rights
$advanced = $this->rc->config->get('acl_advanced_mode');
if ($advanced) {
$items = array();
foreach ($supported as $sup) {
$items[$sup] = $sup;
}
}
else {
$items = array(
'read' => 'lrs',
'write' => 'wi',
'delete' => $deleteright,
'other' => preg_replace('/[lrswi'.$deleteright.']/', '', implode($supported)),
);
}
// Create the table
$attrib['noheader'] = true;
$table = new html_table($attrib);
// Create table header
$table->add_header('user', $this->gettext('identifier'));
foreach (array_keys($items) as $key) {
$label = $this->gettext('shortacl'.$key);
$table->add_header(array('class' => 'acl'.$key, 'title' => $label), $label);
}
$i = 1;
$js_table = array();
foreach ($acl as $user => $rights) {
if ($this->rc->storage->conn->user == $user) {
continue;
}
// filter out virtual rights (c or d) the server may return
$userrights = array_intersect($rights, $supported);
$userid = html_identifier($user);
if (!empty($this->specials) && in_array($user, $this->specials)) {
$user = $this->gettext($user);
}
$table->add_row(array('id' => 'rcmrow'.$userid));
$table->add('user', Q($user));
foreach ($items as $key => $right) {
$in = $this->acl_compare($userrights, $right);
switch ($in) {
case 2: $class = 'enabled'; break;
case 1: $class = 'partial'; break;
default: $class = 'disabled'; break;
}
$table->add('acl' . $key . ' ' . $class, '');
}
$js_table[$userid] = implode($userrights);
}
$this->rc->output->set_env('acl', $js_table);
$this->rc->output->set_env('acl_advanced', $advanced);
$out = $table->show();
return $out;
}
/**
* Handler for ACL update/create action
*/
private function action_save()
{
$mbox = trim(get_input_value('_mbox', RCUBE_INPUT_GPC, true)); // UTF7-IMAP
$user = trim(get_input_value('_user', RCUBE_INPUT_GPC));
$acl = trim(get_input_value('_acl', RCUBE_INPUT_GPC));
$oldid = trim(get_input_value('_old', RCUBE_INPUT_GPC));
$acl = array_intersect(str_split($acl), $this->rights_supported());
$users = $oldid ? array($user) : explode(',', $user);
foreach ($users as $user) {
$user = trim($user);
if (!empty($this->specials) && in_array($user, $this->specials)) {
$username = $this->gettext($user);
}
else {
if (!strpos($user, '@') && ($realm = $this->get_realm())) {
$user .= '@' . rcube_idn_to_ascii(preg_replace('/^@/', '', $realm));
}
$username = $user;
}
if (!$acl || !$user || !strlen($mbox)) {
continue;
}
if ($user != $_SESSION['username'] && $username != $_SESSION['username']) {
if ($this->rc->storage->set_acl($mbox, $user, $acl)) {
$ret = array('id' => html_identifier($user),
'username' => $username, 'acl' => implode($acl), 'old' => $oldid);
$this->rc->output->command('acl_update', $ret);
$result++;
}
}
}
if ($result) {
$this->rc->output->show_message($oldid ? 'acl.updatesuccess' : 'acl.createsuccess', 'confirmation');
}
else {
$this->rc->output->show_message($oldid ? 'acl.updateerror' : 'acl.createerror', 'error');
}
}
/**
* Handler for ACL delete action
*/
private function action_delete()
{
$mbox = trim(get_input_value('_mbox', RCUBE_INPUT_GPC, true)); //UTF7-IMAP
$user = trim(get_input_value('_user', RCUBE_INPUT_GPC));
$user = explode(',', $user);
foreach ($user as $u) {
$u = trim($u);
if ($this->rc->storage->delete_acl($mbox, $u)) {
$this->rc->output->command('acl_remove_row', html_identifier($u));
}
else {
$error = true;
}
}
if (!$error) {
$this->rc->output->show_message('acl.deletesuccess', 'confirmation');
}
else {
$this->rc->output->show_message('acl.deleteerror', 'error');
}
}
/**
* Handler for ACL list update action (with display mode change)
*/
private function action_list()
{
if (in_array('acl_advanced_mode', (array)$this->rc->config->get('dont_override'))) {
return;
}
$this->mbox = trim(get_input_value('_mbox', RCUBE_INPUT_GPC, true)); // UTF7-IMAP
$advanced = trim(get_input_value('_mode', RCUBE_INPUT_GPC));
$advanced = $advanced == 'advanced' ? true : false;
// Save state in user preferences
$this->rc->user->save_prefs(array('acl_advanced_mode' => $advanced));
$out = $this->list_rights();
$out = preg_replace(array('/^<table[^>]+>/', '/<\/table>$/'), '', $out);
$this->rc->output->command('acl_list_update', $out);
}
/**
* Creates <UL> list with descriptive access rights
*
* @param array $rights MYRIGHTS result
*
* @return string HTML content
*/
function acl2text($rights)
{
if (empty($rights)) {
return '';
}
$supported = $this->rights_supported();
$list = array();
$attrib = array(
'name' => 'rcmyrights',
'style' => 'margin:0; padding:0 15px;',
);
foreach ($supported as $right) {
if (in_array($right, $rights)) {
$list[] = html::tag('li', null, Q($this->gettext('acl' . $right)));
}
}
if (count($list) == count($supported))
return Q($this->gettext('aclfull'));
return html::tag('ul', $attrib, implode("\n", $list));
}
/**
* Compares two ACLs (according to supported rights)
*
* @param array $acl1 ACL rights array (or string)
* @param array $acl2 ACL rights array (or string)
*
* @param int Comparision result, 2 - full match, 1 - partial match, 0 - no match
*/
function acl_compare($acl1, $acl2)
{
if (!is_array($acl1)) $acl1 = str_split($acl1);
if (!is_array($acl2)) $acl2 = str_split($acl2);
$rights = $this->rights_supported();
$acl1 = array_intersect($acl1, $rights);
$acl2 = array_intersect($acl2, $rights);
$res = array_intersect($acl1, $acl2);
$cnt1 = count($res);
$cnt2 = count($acl2);
if ($cnt1 == $cnt2)
return 2;
else if ($cnt1)
return 1;
else
return 0;
}
/**
* Get list of supported access rights (according to RIGHTS capability)
*
* @return array List of supported access rights abbreviations
*/
function rights_supported()
{
if ($this->supported !== null) {
return $this->supported;
}
$capa = $this->rc->storage->get_capability('RIGHTS');
if (is_array($capa)) {
$rights = strtolower($capa[0]);
}
else {
$rights = 'cd';
}
return $this->supported = str_split('lrswi' . $rights . 'pa');
}
/**
* Username realm detection.
*
* @return string Username realm (domain)
*/
private function get_realm()
{
// When user enters a username without domain part, realm
// allows to add it to the username (and display correct username in the table)
if (isset($_SESSION['acl_username_realm'])) {
return $_SESSION['acl_username_realm'];
}
// find realm in username of logged user (?)
list($name, $domain) = explode('@', $_SESSION['username']);
// Use (always existent) ACL entry on the INBOX for the user to determine
// whether or not the user ID in ACL entries need to be qualified and how
// they would need to be qualified.
if (empty($domain)) {
$acl = $this->rc->storage->get_acl('INBOX');
if (is_array($acl)) {
$regexp = '/^' . preg_quote($_SESSION['username'], '/') . '@(.*)$/';
foreach (array_keys($acl) as $name) {
if (preg_match($regexp, $name, $matches)) {
$domain = $matches[1];
break;
}
}
}
}
return $_SESSION['acl_username_realm'] = $domain;
}
/**
* Initializes autocomplete LDAP backend
*/
private function init_ldap()
{
if ($this->ldap)
return $this->ldap->ready;
// get LDAP config
$config = $this->rc->config->get('acl_users_source');
if (empty($config)) {
return false;
}
// not an array, use configured ldap_public source
if (!is_array($config)) {
$ldap_config = (array) $this->rc->config->get('ldap_public');
$config = $ldap_config[$config];
}
$uid_field = $this->rc->config->get('acl_users_field', 'mail');
$filter = $this->rc->config->get('acl_users_filter');
if (empty($uid_field) || empty($config)) {
return false;
}
// get name attribute
if (!empty($config['fieldmap'])) {
$name_field = $config['fieldmap']['name'];
}
// ... no fieldmap, use the old method
if (empty($name_field)) {
$name_field = $config['name_field'];
}
// add UID field to fieldmap, so it will be returned in a record with name
$config['fieldmap'] = array(
'name' => $name_field,
'uid' => $uid_field,
);
// search in UID and name fields
$config['search_fields'] = array_values($config['fieldmap']);
$config['required_fields'] = array($uid_field);
// set search filter
if ($filter)
$config['filter'] = $filter;
// disable vlv
$config['vlv'] = false;
// Initialize LDAP connection
$this->ldap = new rcube_ldap($config,
$this->rc->config->get('ldap_debug'),
$this->rc->config->mail_domain($_SESSION['imap_host']));
return $this->ldap->ready;
}
}
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