Viewing File: /usr/local/cpanel/base/3rdparty/roundcube/plugins/kolab_delegation/kolab_delegation_engine.php
<?php
/**
* Kolab Delegation Engine
*
* @version @package_version@
* @author Thomas Bruederli <bruederli@kolabsys.com>
* @author Aleksander Machniak <machniak@kolabsys.com>
*
* Copyright (C) 2011-2012, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class kolab_delegation_engine
{
public $context;
private $rc;
private $ldap;
private $ldap_filter;
private $ldap_delegate_field;
private $ldap_login_field;
private $ldap_name_field;
private $ldap_email_field;
private $ldap_org_field;
private $ldap_dn;
private $cache = array();
private $folder_types = array('mail', 'event', 'task');
private $supported;
const ACL_READ = 1;
const ACL_WRITE = 2;
/**
* Class constructor
*/
public function __construct()
{
$this->rc = rcube::get_instance();
}
/**
* Add delegate
*
* @param string|array $delegate Delegate DN (encoded) or delegate data (result of delegate_get())
* @param array $acl List of folder->right map
*
* @return string On error returns an error label, on success returns null
*/
public function delegate_add($delegate, $acl)
{
if (!is_array($delegate)) {
$delegate = $this->delegate_get($delegate);
}
$dn = $delegate['ID'];
if (empty($delegate) || empty($dn)) {
return 'createerror';
}
$list = $this->list_delegates();
$list = array_keys((array)$list);
$list = array_filter($list);
if (in_array($dn, $list)) {
return 'delegationexisterror';
}
// add delegate to the list
$list[] = $dn;
$list = array_map(array('kolab_ldap', 'dn_decode'), $list);
// update user record
$result = $this->user_update_delegates($list);
// Set ACL on folders
if ($result && !empty($acl)) {
$this->delegate_acl_update($delegate['uid'], $acl);
}
return $result ? null : 'createerror';
}
/**
* Set/Update ACL on delegator's folders
*
* @param string $uid Delegate authentication identifier
* @param array $acl List of folder->right map
* @param bool $update Update (remove) old rights
*
* @return string On error returns an error label, on success returns null
*/
public function delegate_acl_update($uid, $acl, $update = false)
{
$storage = $this->rc->get_storage();
$right_types = $this->right_types();
$folders = $update ? $this->list_folders($uid) : array();
foreach ($acl as $folder_name => $rights) {
$r = $right_types[$rights] ?? null;
if ($r) {
$storage->set_acl($folder_name, $uid, $r);
}
else {
$storage->delete_acl($folder_name, $uid);
}
if (!empty($folders) && isset($folders[$folder_name])) {
unset($folders[$folder_name]);
}
}
foreach ($folders as $folder_name => $folder) {
if (!empty($folder['rights'])) {
$storage->delete_acl($folder_name, $uid);
}
}
}
/**
* Delete delgate
*
* @param string $dn Delegate DN (encoded)
* @param bool $acl_del Enable ACL deletion on delegator folders
*
* @return string On error returns an error label, on success returns null
*/
public function delegate_delete($dn, $acl_del = false)
{
$delegate = $this->delegate_get($dn);
$list = $this->list_delegates();
$user = $this->user();
if (empty($delegate) || !isset($list[$dn])) {
return 'deleteerror';
}
// remove delegate from the list
unset($list[$dn]);
$list = array_keys($list);
$list = array_map(array('kolab_ldap', 'dn_decode'), $list);
$user[$this->ldap_delegate_field] = $list;
// update user record
$result = $this->user_update_delegates($list);
// remove ACL
if ($result && $acl_del) {
$this->delegate_acl_update($delegate['uid'], array(), true);
}
return $result ? null : 'deleteerror';
}
/**
* Return delegate data
*
* @param string $dn Delegate DN (encoded)
*
* @return array Delegate record (ID, name, uid, imap_uid)
*/
public function delegate_get($dn)
{
// use internal cache so we not query LDAP more than once per request
if (!isset($this->cache[$dn])) {
$ldap = $this->ldap();
if (!$ldap || empty($dn)) {
return array();
}
// Get delegate
$user = $ldap->get_record(kolab_ldap::dn_decode($dn));
if (empty($user)) {
return array();
}
$delegate = $this->parse_ldap_record($user);
$delegate['ID'] = $dn;
$this->cache[$dn] = $delegate;
}
return $this->cache[$dn];
}
/**
* Return delegate data
*
* @param string $login Delegate name (the 'uid' returned in get_users())
*
* @return array Delegate record (ID, name, uid, imap_uid)
*/
public function delegate_get_by_name($login)
{
$ldap = $this->ldap();
if (!$ldap || empty($login)) {
return array();
}
$list = $ldap->dosearch($this->ldap_login_field, $login, 1);
if (count($list) == 1) {
$dn = key($list);
$user = $list[$dn];
return $this->parse_ldap_record($user, $dn);
}
}
/**
* LDAP object getter
*/
private function ldap()
{
if ($this->ldap !== null) {
return $this->ldap;
}
$this->ldap = kolab_storage::ldap('kolab_delegation_addressbook');
if (!$this->ldap || !$this->ldap->ready) {
return null;
}
// Default filter of LDAP queries
$this->ldap_filter = $this->rc->config->get('kolab_delegation_filter', '(|(objectClass=kolabInetOrgPerson)(&(objectclass=kolabsharedfolder)(kolabFolderType=mail)))');
// Name of the LDAP field for delegates list
$this->ldap_delegate_field = $this->rc->config->get('kolab_delegation_delegate_field', 'kolabDelegate');
// Encoded LDAP DN of current user, set on login by kolab_auth plugin
$this->ldap_dn = $_SESSION['kolab_dn'];
// Name of the LDAP field with authentication ID
$this->ldap_login_field = $this->rc->config->get('kolab_delegation_login_field', $this->rc->config->get('kolab_auth_login'));
// Name of the LDAP field with user name used for identities
$this->ldap_name_field = $this->rc->config->get('kolab_delegation_name_field', $this->rc->config->get('kolab_auth_name'));
// Name of the LDAP field with email addresses used for identities
$this->ldap_email_field = $this->rc->config->get('kolab_delegation_email_field', $this->rc->config->get('kolab_auth_email'));
// Name of the LDAP field with organization name for identities
$this->ldap_org_field = $this->rc->config->get('kolab_delegation_organization_field', $this->rc->config->get('kolab_auth_organization'));
$this->ldap->set_filter($this->ldap_filter);
$this->ldap->extend_fieldmap(array($this->ldap_delegate_field => $this->ldap_delegate_field));
return $this->ldap;
}
/**
* List current user delegates
*/
public function list_delegates()
{
$result = array();
$ldap = $this->ldap();
$user = $this->user();
if (empty($ldap) || empty($user)) {
return array();
}
// Get delegates of current user
$delegates = $user[$this->ldap_delegate_field] ?? null;
if (!empty($delegates)) {
foreach ((array)$delegates as $dn) {
$delegate = $ldap->get_record($dn);
$data = $this->parse_ldap_record($delegate, $dn);
if (!empty($data) && !empty($data['name'])) {
$result[$data['ID']] = $data['name'];
}
}
}
return $result;
}
/**
* List current user delegators
*
* @return array List of delegators
*/
public function list_delegators()
{
$result = array();
$ldap = $this->ldap();
if (empty($ldap) || empty($this->ldap_dn)) {
return array();
}
$list = $ldap->dosearch($this->ldap_delegate_field, $this->ldap_dn, 1);
foreach ($list as $dn => $delegator) {
$delegator = $this->parse_ldap_record($delegator, $dn);
$result[$delegator['ID']] = $delegator;
}
return $result;
}
/**
* List current user delegators in format compatible with Calendar plugin
*
* @return array List of delegators
*/
public function list_delegators_js()
{
$list = $this->list_delegators();
$result = array();
foreach ($list as $delegator) {
$name = $delegator['name'];
if ($pos = strrpos($name, '(')) {
$name = trim(substr($name, 0, $pos));
}
$result[$delegator['imap_uid']] = array(
'emails' => ';' . implode(';', $delegator['email']),
'email' => $delegator['email'][0],
'name' => $name,
);
}
return $result;
}
/**
* Prepare namespace prefixes for JS environment
*
* @return array List of prefixes
*/
public function namespace_js()
{
$storage = $this->rc->get_storage();
$ns = $storage->get_namespace('other');
if ($ns) {
foreach ($ns as $idx => $nsval) {
$ns[$idx] = kolab_storage::folder_id($nsval[0]);
}
}
return $ns;
}
/**
* Get all folders to which current user has admin access
*
* @param string $delegate IMAP user identifier
*
* @return array Folder type/rights
*/
public function list_folders($delegate = null)
{
$storage = $this->rc->get_storage();
$folders = $storage->list_folders();
$metadata = kolab_storage::folders_typedata();
$result = array();
if (!is_array($metadata)) {
return $result;
}
// Definition of read and write ACL
$right_types = $this->right_types();
$delegate_lc = strtolower((string) $delegate);
foreach ($folders as $folder) {
// get only folders in personal namespace
if ($storage->folder_namespace($folder) != 'personal') {
continue;
}
$rights = null;
$type = !empty($metadata[$folder]) ? $metadata[$folder] : 'mail';
list($class, $subclass) = strpos($type, '.') ? explode('.', $type) : [$type, ''];
if (!in_array($class, $this->folder_types)) {
continue;
}
// in edit mode, get folder ACL
if ($delegate) {
// @TODO: cache ACL
$imap_acl = $storage->get_acl($folder);
if (!empty($imap_acl) && (($acl = ($imap_acl[$delegate] ?? null)) || ($acl = ($imap_acl[$delegate_lc] ?? null)))) {
if ($this->acl_compare($acl, $right_types[self::ACL_WRITE])) {
$rights = self::ACL_WRITE;
}
else if ($this->acl_compare($acl, $right_types[self::ACL_READ])) {
$rights = self::ACL_READ;
}
}
}
else if ($folder == 'INBOX' || $subclass == 'default' || $subclass == 'inbox') {
$rights = self::ACL_WRITE;
}
$result[$folder] = array(
'type' => $class,
'rights' => $rights,
);
}
return $result;
}
/**
* Returns list of users for autocompletion
*
* @param string $search Search string
*
* @return array Users list
*/
public function list_users($search)
{
$ldap = $this->ldap();
if (empty($ldap) || $search === '' || $search === null) {
return array();
}
$max = (int) $this->rc->config->get('autocomplete_max', 15);
$mode = (int) $this->rc->config->get('addressbook_search_mode');
$fields = array_unique(array_filter(array_merge((array)$this->ldap_name_field, (array)$this->ldap_login_field)));
$users = array();
$keys = array();
$result = $ldap->dosearch($fields, $search, $mode, (array)$this->ldap_login_field, $max);
foreach ($result as $record) {
// skip self
if ($record['dn'] == $_SESSION['kolab_dn']) {
continue;
}
$user = $this->parse_ldap_record($record);
if ($user['uid']) {
$display = rcube_addressbook::compose_search_name($record);
$user = array('name' => $user['uid'], 'display' => $display);
$users[] = $user;
$keys[] = $display ?: $user['uid'];
}
}
if (count($users)) {
// sort users index
asort($keys, SORT_LOCALE_STRING);
// re-sort users according to index
foreach (array_keys($keys) as $idx) {
$keys[$idx] = $users[$idx];
}
$users = array_values($keys);
}
return $users;
}
/**
* Extract delegate identifiers and pretty name from LDAP record
*/
private function parse_ldap_record($data, $dn = null)
{
$email = array();
$uid = $data[$this->ldap_login_field];
if (is_array($uid)) {
$uid = array_filter($uid);
$uid = $uid[0];
}
// User name for identity
foreach ((array)$this->ldap_name_field as $field) {
$name = is_array($data[$field]) ? $data[$field][0] : $data[$field];
if (!empty($name)) {
break;
}
}
// User email(s) for identity
foreach ((array)$this->ldap_email_field as $field) {
$user_email = is_array($data[$field]) ? array_filter($data[$field]) : $data[$field];
if (!empty($user_email)) {
$email = array_merge((array)$email, (array)$user_email);
}
}
// Organization for identity
foreach ((array)$this->ldap_org_field as $field) {
$organization = is_array($data[$field]) ? $data[$field][0] : $data[$field];
if (!empty($organization)) {
break;
}
}
$realname = $name;
if ($uid && $name) {
$name .= ' (' . $uid . ')';
}
else {
$name = $uid;
}
// get IMAP uid - identifier used in shared folder hierarchy
$imap_uid = $uid;
if ($pos = strpos($imap_uid, '@')) {
$imap_uid = substr($imap_uid, 0, $pos);
}
return array(
'ID' => kolab_ldap::dn_encode($dn),
'uid' => $uid,
'name' => $name,
'realname' => $realname,
'imap_uid' => $imap_uid,
'email' => $email,
'organization' => $organization ?? null,
);
}
/**
* Returns LDAP record of current user
*
* @return array User data
*/
public function user($parsed = false)
{
if (!isset($this->cache['user'])) {
$ldap = $this->ldap();
if (!$ldap) {
return array();
}
// Get current user record
$this->cache['user'] = $ldap->get_record($this->ldap_dn);
}
return $parsed ? $this->parse_ldap_record($this->cache['user']) : $this->cache['user'];
}
/**
* Update LDAP record of current user
*
* @param array List of delegates
*/
public function user_update_delegates($list)
{
$ldap = $this->ldap();
$pass = $this->rc->decrypt($_SESSION['password']);
if (!$ldap) {
return false;
}
// need to bind as self for sufficient privilages
if (!$ldap->bind($this->ldap_dn, $pass)) {
return false;
}
$user[$this->ldap_delegate_field] = $list;
unset($this->cache['user']);
// replace delegators list in user record
return $ldap->replace($this->ldap_dn, $user);
}
/**
* Manage delegation data on user login
*/
public function delegation_init()
{
// Fetch all delegators from LDAP who assigned the
// current user as their delegate and create identities
// a) if identity with delegator's email exists, continue
// b) create identity ($delegate on behalf of $delegator
// <$delegator-email>) for new delegators
// c) remove all other identities which do not match the user's primary
// or alias email if 'kolab_delegation_purge_identities' is set.
$delegators = $this->list_delegators();
$use_subs = $this->rc->config->get('kolab_use_subscriptions');
$identities = $this->rc->user->list_emails();
$emails = array();
$uids = array();
if (!empty($delegators)) {
$storage = $this->rc->get_storage();
$other_ns = $storage->get_namespace('other') ?: array();
$folders = $storage->list_folders();
}
// convert identities to simpler format for faster access
foreach ($identities as $idx => $ident) {
// get user name from default identity
if (!$idx) {
$default = array(
'name' => $ident['name'],
);
}
$emails[$ident['identity_id']] = $ident['email'];
}
// for every delegator...
foreach ($delegators as $delegator) {
$uids[$delegator['imap_uid']] = $email_arr = $delegator['email'];
$diff = array_intersect($emails, $email_arr);
// identity with delegator's email already exist, do nothing
if (count($diff)) {
$emails = array_diff($emails, $email_arr);
continue;
}
// create identities for delegator emails
foreach ($email_arr as $email) {
// @TODO: "Delegatorname" or "Username on behalf of Delegatorname"?
$default['name'] = $delegator['realname'];
$default['email'] = $email;
// Database field for organization is NOT NULL
$default['organization'] = empty($delegator['organization']) ? '' : $delegator['organization'];
$this->rc->user->insert_identity($default);
}
// IMAP folders shared by new delegators shall be subscribed on login,
// as well as existing subscriptions of previously shared folders shall
// be removed. I suppose the latter one is already done in Roundcube.
// for every accessible folder...
foreach ($folders as $folder) {
// for every 'other' namespace root...
foreach ($other_ns as $ns) {
$prefix = $ns[0] . $delegator['imap_uid'];
// subscribe delegator's folder
if ($folder === $prefix || strpos($folder, $prefix . substr($ns[0], -1)) === 0) {
// Event/Task folders need client-side activation
$type = kolab_storage::folder_type($folder);
if (preg_match('/^(event|task)/i', $type)) {
kolab_storage::folder_activate($folder);
}
// Subscribe to mail folders and (if system is configured
// to display only subscribed folders) to other
if ($use_subs || preg_match('/^mail/i', $type)) {
$storage->subscribe($folder);
}
}
}
}
}
// remove identities that "do not belong" to user nor delegators
if ($this->rc->config->get('kolab_delegation_purge_identities')) {
$user = $this->user(true);
$emails = array_diff($emails, $user['email']);
foreach (array_keys($emails) as $idx) {
$this->rc->user->delete_identity($idx);
}
}
$_SESSION['delegators'] = $uids;
}
/**
* Sets delegator context according to email message recipient
*
* @param rcube_message $message Email message object
*/
public function delegator_context_from_message($message)
{
if (empty($_SESSION['delegators'])) {
return;
}
// Match delegators' addresses with message To: address
// @TODO: Is this reliable enough?
// Roundcube sends invitations to every attendee separately,
// but maybe there's a software which sends with CC header or many addresses in To:
$emails = $message->get_header('to');
$emails = rcube_mime::decode_address_list($emails, null, false);
foreach ($emails as $email) {
foreach ($_SESSION['delegators'] as $uid => $addresses) {
if (in_array($email['mailto'], $addresses)) {
return $this->context = $uid;
}
}
}
}
/**
* Return (set) current delegator context
*
* @return string Delegator UID
*/
public function delegator_context()
{
if (!$this->context && !empty($_SESSION['delegators'])) {
$context = rcube_utils::get_input_value('_context', rcube_utils::INPUT_GPC);
if ($context && isset($_SESSION['delegators'][$context])) {
$this->context = $context;
}
}
return $this->context;
}
/**
* Set user identity according to delegator delegator
*
* @param array $args Reference to plugin hook arguments
*/
public function delegator_identity_filter(&$args)
{
$context = $this->delegator_context();
if (!$context) {
return;
}
$identities = $this->rc->user->list_emails();
$emails = $_SESSION['delegators'][$context];
foreach ($identities as $ident) {
if (in_array($ident['email'], $emails)) {
$args['identity'] = $ident;
return;
}
}
// fallback to default identity
$args['identity'] = array_shift($identities);
}
/**
* Filter user emails according to delegator context
*
* @param array $args Reference to plugin hook arguments
*/
public function delegator_emails_filter(&$args)
{
$context = $this->delegator_context();
// try to derive context from the given user email
if (!$context && !empty($args['emails'])) {
if (($user = preg_replace('/@.+$/', '', $args['emails'][0])) && isset($_SESSION['delegators'][$user])) {
$context = $user;
}
}
// return delegator's addresses
if ($context) {
$args['emails'] = $_SESSION['delegators'][$context];
$args['abort'] = true;
}
// return only user addresses (exclude all delegators addresses)
else if (!empty($_SESSION['delegators'])) {
$identities = $this->rc->user->list_emails();
$emails[] = $this->rc->user->get_username();
foreach ($identities as $identity) {
$emails[] = $identity['email'];
}
foreach ($_SESSION['delegators'] as $delegator_emails) {
$emails = array_diff($emails, $delegator_emails);
}
$args['emails'] = array_unique($emails);
$args['abort'] = true;
}
}
/**
* Filters list of calendar/task folders according to delegator context
*
* @param array $args Reference to plugin hook arguments
*/
public function delegator_folder_filter(&$args, $mode = 'calendars')
{
$context = $this->delegator_context();
if (empty($context)) {
return $args;
}
$storage = $this->rc->get_storage();
$other_ns = $storage->get_namespace('other') ?: array();
$delim = $storage->get_hierarchy_delimiter();
if ($mode == 'calendars') {
$editable = $args['filter'] & calendar_driver::FILTER_WRITEABLE;
$active = $args['filter'] & calendar_driver::FILTER_ACTIVE;
$personal = $args['filter'] & calendar_driver::FILTER_PERSONAL;
$shared = $args['filter'] & calendar_driver::FILTER_SHARED;
}
else {
$editable = $args['filter'] & tasklist_driver::FILTER_WRITEABLE;
$active = $args['filter'] & tasklist_driver::FILTER_ACTIVE;
$personal = $args['filter'] & tasklist_driver::FILTER_PERSONAL;
$shared = $args['filter'] & tasklist_driver::FILTER_SHARED;
}
$folders = array();
foreach ($args['list'] as $folder) {
if (isset($folder->ready) && !$folder->ready) {
continue;
}
if ($editable && !$folder->editable) {
continue;
}
if ($active && !$folder->storage->is_active()) {
continue;
}
if ($personal || $shared) {
$ns = $folder->get_namespace();
if ($personal && $ns == 'personal') {
continue;
}
else if ($personal && $ns == 'other') {
$found = false;
foreach ($other_ns as $ns) {
$c_folder = $ns[0] . $context . $delim;
if (strpos($folder->name, $c_folder) === 0) {
$found = true;
}
}
if (!$found) {
continue;
}
}
else if (!$shared || $ns != 'shared') {
continue;
}
}
$folders[$folder->id] = $folder;
}
$args[$mode] = $folders;
$args['abort'] = true;
}
/**
* Filters/updates message headers according to delegator context
*
* @param array $args Reference to plugin hook arguments
*/
public function delegator_delivery_filter(&$args)
{
// no context, but message still can be send on behalf of...
if (!empty($_SESSION['delegators'])) {
$message = $args['message'];
$headers = $message->headers();
// get email address from From: header
$from = rcube_mime::decode_address_list($headers['From']);
$from = array_shift($from);
$from = $from['mailto'];
foreach ($_SESSION['delegators'] as $uid => $addresses) {
if (in_array($from, $addresses)) {
$context = $uid;
break;
}
}
// add Sender: header with current user default identity
if (!empty($context)) {
$identity = $this->rc->user->get_identity();
$sender = format_email_recipient($identity['email'], $identity['name']);
$message->headers(array('Sender' => $sender), false, true);
}
}
}
/**
* Compares two ACLs (according to supported rights)
*
* @param array $acl1 ACL rights array (or string)
* @param array $acl2 ACL rights array (or string)
*
* @param bool True if $acl1 contains all rights from $acl2
*/
function acl_compare($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 >= $cnt2) {
return true;
}
}
/**
* Get list of supported access rights (according to RIGHTS capability)
*
* @todo: this is stolen from acl plugin, move to rcube_storage/rcube_imap
*
* @return array List of supported access rights abbreviations
*/
public function rights_supported()
{
if ($this->supported !== null) {
return $this->supported;
}
$storage = $this->rc->get_storage();
$capa = $storage->get_capability('RIGHTS');
if (is_array($capa)) {
$rights = strtolower($capa[0]);
}
else {
$rights = 'cd';
}
return $this->supported = str_split('lrswi' . $rights . 'pa');
}
private function right_types()
{
// 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'), $supported));
return array(
self::ACL_READ => 'lrs',
self::ACL_WRITE => 'lrswi'.$deleteright,
);
}
}
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