499 lines
15 KiB
PHP
499 lines
15 KiB
PHP
<?php
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/**
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* Kolab Authentication
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*
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* @version @package_version@
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* @author Aleksander Machniak <machniak@kolabsys.com>
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*
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* Copyright (C) 2011-2013, Kolab Systems AG <contact@kolabsys.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Wrapper class for rcube_ldap_generic
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*/
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class kolab_auth_ldap extends rcube_ldap_generic
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{
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private $icache = array();
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function __construct($p)
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{
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$rcmail = rcube::get_instance();
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$this->debug = (bool) $rcmail->config->get('ldap_debug');
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$this->fieldmap = $p['fieldmap'];
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$this->fieldmap['uid'] = 'uid';
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$p['attributes'] = array_values($this->fieldmap);
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// Connect to the server (with bind)
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parent::__construct($p);
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$this->_connect();
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$rcmail->add_shutdown_function(array($this, 'close'));
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}
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/**
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* Establish a connection to the LDAP server
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*/
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private function _connect()
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{
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$rcube = rcube::get_instance();
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// try to connect + bind for every host configured
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// with OpenLDAP 2.x ldap_connect() always succeeds but ldap_bind will fail if host isn't reachable
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// see http://www.php.net/manual/en/function.ldap-connect.php
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foreach ((array)$this->config['hosts'] as $host) {
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// skip host if connection failed
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if (!$this->connect($host)) {
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continue;
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}
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$bind_pass = $this->config['bind_pass'];
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$bind_user = $this->config['bind_user'];
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$bind_dn = $this->config['bind_dn'];
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if (empty($bind_pass)) {
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$this->ready = true;
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}
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else {
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if (!empty($bind_dn)) {
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$this->ready = $this->bind($bind_dn, $bind_pass);
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}
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else if (!empty($this->config['auth_cid'])) {
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$this->ready = $this->sasl_bind($this->config['auth_cid'], $bind_pass, $bind_user);
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}
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else {
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$this->ready = $this->sasl_bind($bind_user, $bind_pass);
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}
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}
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// connection established, we're done here
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if ($this->ready) {
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break;
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}
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} // end foreach hosts
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if (!is_resource($this->conn)) {
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rcube::raise_error(array('code' => 100, 'type' => 'ldap',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Could not connect to any LDAP server, last tried $host"), true);
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$this->ready = false;
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}
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return $this->ready;
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}
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/**
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* Fetches user data from LDAP addressbook
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*/
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function get_user_record($user, $host)
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{
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$rcmail = rcube::get_instance();
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$filter = $rcmail->config->get('kolab_auth_filter');
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$filter = $this->parse_vars($filter, $user, $host);
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$base_dn = $this->parse_vars($this->config['base_dn'], $user, $host);
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$scope = $this->config['scope'];
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// @TODO: print error if filter is empty
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// get record
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if ($result = parent::search($base_dn, $filter, $scope, $this->attributes)) {
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if ($result->count() == 1) {
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$entries = $result->entries(true);
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$dn = key($entries);
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$entry = array_pop($entries);
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$entry = $this->field_mapping($dn, $entry);
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return $entry;
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}
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}
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}
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/**
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* Fetches user data from LDAP addressbook
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*/
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function get_user_groups($dn, $user, $host)
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{
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if (empty($dn) || empty($this->config['groups'])) {
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return array();
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}
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$base_dn = $this->parse_vars($this->config['groups']['base_dn'], $user, $host);
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$name_attr = $this->config['groups']['name_attr'] ? $this->config['groups']['name_attr'] : 'cn';
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$member_attr = $this->get_group_member_attr();
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$filter = "(member=$dn)(uniqueMember=$dn)";
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if ($member_attr != 'member' && $member_attr != 'uniqueMember')
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$filter .= "($member_attr=$dn)";
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$filter = strtr("(|$filter)", array("\\" => "\\\\"));
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$result = parent::search($base_dn, $filter, 'sub', array('dn', $name_attr));
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if (!$result) {
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return array();
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}
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$groups = array();
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foreach ($result as $entry) {
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$entry = rcube_ldap_generic::normalize_entry($entry);
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if (!$entry['dn']) {
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$entry['dn'] = $result->get_dn();
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}
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$groups[$entry['dn']] = $entry[$name_attr];
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}
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return $groups;
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}
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/**
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* Get a specific LDAP record
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*
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* @param string DN
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*
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* @return array Record data
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*/
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function get_record($dn)
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{
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if (!$this->ready) {
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return;
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}
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if ($rec = $this->get_entry($dn)) {
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$rec = rcube_ldap_generic::normalize_entry($rec);
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$rec = $this->field_mapping($dn, $rec);
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}
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return $rec;
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}
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/**
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* Replace LDAP record data items
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*
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* @param string $dn DN
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* @param array $entry LDAP entry
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*
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* return bool True on success, False on failure
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*/
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function replace($dn, $entry)
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{
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// fields mapping
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foreach ($this->fieldmap as $field => $attr) {
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if (array_key_exists($field, $entry)) {
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$entry[$attr] = $entry[$field];
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unset($entry[$field]);
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}
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}
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return $this->mod_replace($dn, $entry);
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}
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/**
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* Search records (simplified version of rcube_ldap::search)
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*
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* @param mixed $fields The field name of array of field names to search in
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* @param mixed $value Search value (or array of values when $fields is array)
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* @param int $mode Matching mode:
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* 0 - partial (*abc*),
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* 1 - strict (=),
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* 2 - prefix (abc*)
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* @param boolean $select True if results are requested, False if count only
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* @param array $required List of fields that cannot be empty
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* @param int $limit Number of records
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*
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* @return array List or false on error
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*/
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function search($fields, $value, $mode=1, $required = array(), $limit = 0)
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{
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$mode = intval($mode);
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// use AND operator for advanced searches
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$filter = is_array($value) ? '(&' : '(|';
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// set wildcards
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$wp = $ws = '';
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if (!empty($this->config['fuzzy_search']) && $mode != 1) {
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$ws = '*';
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if (!$mode) {
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$wp = '*';
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}
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}
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foreach ((array)$fields as $idx => $field) {
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$val = is_array($value) ? $value[$idx] : $value;
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if ($attrs = (array) $this->fieldmap[$field]) {
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if (count($attrs) > 1)
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$filter .= '(|';
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foreach ($attrs as $f)
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$filter .= "($f=$wp" . rcube_ldap_generic::quote_string($val) . "$ws)";
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if (count($attrs) > 1)
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$filter .= ')';
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}
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}
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$filter .= ')';
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// add required (non empty) fields filter
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$req_filter = '';
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foreach ((array)$required as $field) {
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if (in_array($field, (array)$fields)) // required field is already in search filter
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continue;
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if ($attrs = (array) $this->fieldmap[$field]) {
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if (count($attrs) > 1)
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$req_filter .= '(|';
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foreach ($attrs as $f)
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$req_filter .= "($f=*)";
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if (count($attrs) > 1)
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$req_filter .= ')';
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}
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}
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if (!empty($req_filter)) {
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$filter = '(&' . $req_filter . $filter . ')';
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}
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// avoid double-wildcard if $value is empty
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$filter = preg_replace('/\*+/', '*', $filter);
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// add general filter to query
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if (!empty($this->config['filter'])) {
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$filter = '(&(' . preg_replace('/^\(|\)$/', '', $this->config['filter']) . ')' . $filter . ')';
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}
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$base_dn = $this->parse_vars($this->config['base_dn']);
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$scope = $this->config['scope'];
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$attrs = array_values($this->fieldmap);
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$list = array();
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if ($result = parent::search($base_dn, $filter, $scope, $attrs)) {
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$i = 0;
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foreach ($result as $entry) {
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if ($limit && $limit <= $i) {
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break;
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}
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$dn = $result->get_dn();
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$entry = rcube_ldap_generic::normalize_entry($entry);
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$list[$dn] = $this->field_mapping($dn, $entry);
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$i++;
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}
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}
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return $list;
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}
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/**
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* Set filter used in search()
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*/
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function set_filter($filter)
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{
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$this->config['filter'] = $filter;
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}
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/**
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* Maps LDAP attributes to defined fields
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*/
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protected function field_mapping($dn, $entry)
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{
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$entry['dn'] = $dn;
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// fields mapping
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foreach ($this->fieldmap as $field => $attr) {
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if (isset($entry[$attr])) {
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$entry[$field] = $entry[$attr];
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}
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}
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return $entry;
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}
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/**
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* Detects group member attribute name
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*/
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private function get_group_member_attr($object_classes = array())
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{
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if (empty($object_classes)) {
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$object_classes = $this->config['groups']['object_classes'];
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}
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if (!empty($object_classes)) {
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foreach ((array)$object_classes as $oc) {
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switch (strtolower($oc)) {
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case 'group':
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case 'groupofnames':
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case 'kolabgroupofnames':
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$member_attr = 'member';
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break;
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case 'groupofuniquenames':
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case 'kolabgroupofuniquenames':
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$member_attr = 'uniqueMember';
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break;
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}
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}
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}
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if (!empty($member_attr)) {
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return $member_attr;
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}
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if (!empty($this->config['groups']['member_attr'])) {
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return $this->config['groups']['member_attr'];
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}
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return 'member';
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}
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/**
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* Prepares filter query for LDAP search
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*/
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function parse_vars($str, $user = null, $host = null)
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{
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// When authenticating user $user is always set
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// if not set it means we use this LDAP object for other
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// purposes, e.g. kolab_delegation, then username with
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// correct domain is in a session
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if (!$user) {
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$user = $_SESSION['username'];
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}
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if (isset($this->icache[$user])) {
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list($user, $dc) = $this->icache[$user];
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}
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else {
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$orig_user = $user;
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$rcmail = rcube::get_instance();
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// get default domain
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if ($username_domain = $rcmail->config->get('username_domain')) {
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if ($host && is_array($username_domain) && isset($username_domain[$host])) {
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$domain = rcube_utils::parse_host($username_domain[$host], $host);
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}
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else if (is_string($username_domain)) {
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$domain = rcube_utils::parse_host($username_domain, $host);
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}
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}
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// realmed username (with domain)
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if (strpos($user, '@')) {
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list($usr, $dom) = explode('@', $user);
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// unrealm domain, user login can contain a domain alias
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if ($dom != $domain && ($dc = $this->find_domain($dom))) {
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// @FIXME: we should replace domain in $user, I suppose
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}
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}
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else if ($domain) {
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$user .= '@' . $domain;
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}
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$this->icache[$orig_user] = array($user, $dc);
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}
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// replace variables in filter
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list($u, $d) = explode('@', $user);
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// hierarchal domain string
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if (empty($dc)) {
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$dc = 'dc=' . strtr($d, array('.' => ',dc='));
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}
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$replaces = array('%dc' => $dc, '%d' => $d, '%fu' => $user, '%u' => $u);
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$this->parse_replaces = $replaces;
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return strtr($str, $replaces);
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}
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/**
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* Find root domain for specified domain
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*
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* @param string $domain Domain name
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*
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* @return string Domain DN string
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*/
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function find_domain($domain)
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{
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if (empty($domain) || empty($this->config['domain_base_dn']) || empty($this->config['domain_filter'])) {
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return null;
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}
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$base_dn = $this->config['domain_base_dn'];
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$filter = $this->config['domain_filter'];
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$name_attr = $this->config['domain_name_attribute'];
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if (empty($name_attr)) {
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$name_attr = 'associateddomain';
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}
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$filter = str_replace('%s', rcube_ldap_generic::quote_string($domain), $filter);
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$result = parent::search($base_dn, $filter, 'sub', array($name_attr, 'inetdomainbasedn'));
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if (!$result) {
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return null;
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}
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$entries = $result->entries(true);
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$entry_dn = key($entries);
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$entry = $entries[$entry_dn];
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if (is_array($entry)) {
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if (!empty($entry['inetdomainbasedn'])) {
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return $entry['inetdomainbasedn'];
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}
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$domain = is_array($entry[$name_attr]) ? $entry[$name_attr][0] : $entry[$name_attr];
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return $domain ? 'dc=' . implode(',dc=', explode('.', $domain)) : null;
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}
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}
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/**
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* Returns variables used for replacement in (last) parse_vars() call
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*
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* @return array Variable-value hash array
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*/
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public function get_parse_vars()
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{
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return $this->parse_replaces;
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}
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/**
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* HTML-safe DN string encoding
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*
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* @param string $str DN string
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*
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* @return string Encoded HTML identifier string
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*/
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static function dn_encode($str)
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{
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return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
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}
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/**
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* Decodes DN string encoded with _dn_encode()
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*
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* @param string $str Encoded HTML identifier string
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*
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* @return string DN string
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*/
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static function dn_decode($str)
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{
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$str = str_pad(strtr($str, '-_', '+/'), strlen($str) % 4, '=', STR_PAD_RIGHT);
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return base64_decode($str);
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}
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}
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