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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Alexander Bergolth <leo@strike.wu.ac.at>
* @author Allan Nordhøy <epost@anotheragency.no>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Jean-Louis Dupond <jean-louis@dupond.be>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Nicolas Grekas <nicolas.grekas@gmail.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Stefan Weil <sw@weilnetz.de>
* @author Tobias Brunner <tobias@tobru.ch>
* @author Victor Dubiniuk <dubiniuk@owncloud.com>
* @author Xuanwo <xuanwo@yunify.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\User_LDAP;
use OC\ServerNotAvailableException;
class Wizard extends LDAPUtility {
/** @var \OCP\IL10N */
static protected $l;
protected $access;
protected $cr;
protected $configuration;
protected $result;
protected $resultCache = array();
const LRESULT_PROCESSED_OK = 2;
const LRESULT_PROCESSED_INVALID = 3;
const LRESULT_PROCESSED_SKIP = 4;
const LFILTER_LOGIN = 2;
const LFILTER_USER_LIST = 3;
const LFILTER_GROUP_LIST = 4;
const LFILTER_MODE_ASSISTED = 2;
const LFILTER_MODE_RAW = 1;
const LDAP_NW_TIMEOUT = 4;
/**
* Constructor
* @param Configuration $configuration an instance of Configuration
* @param ILDAPWrapper $ldap an instance of ILDAPWrapper
* @param Access $access
*/
public function __construct(Configuration $configuration, ILDAPWrapper $ldap, Access $access) {
parent::__construct($ldap);
$this->configuration = $configuration;
if(is_null(Wizard::$l)) {
Wizard::$l = \OC::$server->getL10N('user_ldap');
}
$this->access = $access;
$this->result = new WizardResult();
}
public function __destruct() {
if($this->result->hasChanges()) {
$this->configuration->saveConfiguration();
}
}
/**
* counts entries in the LDAP directory
*
* @param string $filter the LDAP search filter
* @param string $type a string being either 'users' or 'groups';
* @return bool|int
* @throws \Exception
*/
public function countEntries($filter, $type) {
$reqs = array('ldapHost', 'ldapPort', 'ldapBase');
if($type === 'users') {
$reqs[] = 'ldapUserFilter';
}
if(!$this->checkRequirements($reqs)) {
throw new \Exception('Requirements not met', 400);
}
$attr = array('dn'); // default
$limit = 1001;
if($type === 'groups') {
$result = $this->access->countGroups($filter, $attr, $limit);
} else if($type === 'users') {
$result = $this->access->countUsers($filter, $attr, $limit);
} else if ($type === 'objects') {
$result = $this->access->countObjects($limit);
} else {
throw new \Exception('Internal error: Invalid object type', 500);
}
return $result;
}
/**
* formats the return value of a count operation to the string to be
* inserted.
*
* @param bool|int $count
* @return int|string
*/
private function formatCountResult($count) {
$formatted = ($count !== false) ? $count : 0;
if($formatted > 1000) {
$formatted = '> 1000';
}
return $formatted;
}
public function countGroups() {
$filter = $this->configuration->ldapGroupFilter;
if(empty($filter)) {
$output = self::$l->n('%s group found', '%s groups found', 0, array(0));
$this->result->addChange('ldap_group_count', $output);
return $this->result;
}
try {
$groupsTotal = $this->formatCountResult($this->countEntries($filter, 'groups'));
} catch (\Exception $e) {
//400 can be ignored, 500 is forwarded
if($e->getCode() === 500) {
throw $e;
}
return false;
}
$output = self::$l->n('%s group found', '%s groups found', $groupsTotal, array($groupsTotal));
$this->result->addChange('ldap_group_count', $output);
return $this->result;
}
/**
* @return WizardResult
* @throws \Exception
*/
public function countUsers() {
$filter = $this->access->getFilterForUserCount();
$usersTotal = $this->formatCountResult($this->countEntries($filter, 'users'));
$output = self::$l->n('%s user found', '%s users found', $usersTotal, array($usersTotal));
$this->result->addChange('ldap_user_count', $output);
return $this->result;
}
/**
* counts any objects in the currently set base dn
*
* @return WizardResult
* @throws \Exception
*/
public function countInBaseDN() {
// we don't need to provide a filter in this case
$total = $this->countEntries(null, 'objects');
if($total === false) {
throw new \Exception('invalid results received');
}
$this->result->addChange('ldap_test_base', $total);
return $this->result;
}
/**
* counts users with a specified attribute
* @param string $attr
* @param bool $existsCheck
* @return int|bool
*/
public function countUsersWithAttribute($attr, $existsCheck = false) {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$filter = $this->access->combineFilterWithAnd(array(
$this->configuration->ldapUserFilter,
$attr . '=*'
));
$limit = ($existsCheck === false) ? null : 1;
return $this->access->countUsers($filter, array('dn'), $limit);
}
/**
* detects the display name attribute. If a setting is already present that
* returns at least one hit, the detection will be canceled.
* @return WizardResult|bool
* @throws \Exception
*/
public function detectUserDisplayNameAttribute() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$attr = $this->configuration->ldapUserDisplayName;
if ($attr !== '' && $attr !== 'displayName') {
// most likely not the default value with upper case N,
// verify it still produces a result
$count = intval($this->countUsersWithAttribute($attr, true));
if($count > 0) {
//no change, but we sent it back to make sure the user interface
//is still correct, even if the ajax call was cancelled meanwhile
$this->result->addChange('ldap_display_name', $attr);
return $this->result;
}
}
// first attribute that has at least one result wins
$displayNameAttrs = array('displayname', 'cn');
foreach ($displayNameAttrs as $attr) {
$count = intval($this->countUsersWithAttribute($attr, true));
if($count > 0) {
$this->applyFind('ldap_display_name', $attr);
return $this->result;
}
};
throw new \Exception(self::$l->t('Could not detect user display name attribute. Please specify it yourself in advanced LDAP settings.'));
}
/**
* detects the most often used email attribute for users applying to the
* user list filter. If a setting is already present that returns at least
* one hit, the detection will be canceled.
* @return WizardResult|bool
*/
public function detectEmailAttribute() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$attr = $this->configuration->ldapEmailAttribute;
if ($attr !== '') {
$count = intval($this->countUsersWithAttribute($attr, true));
if($count > 0) {
return false;
}
$writeLog = true;
} else {
$writeLog = false;
}
$emailAttributes = array('mail', 'mailPrimaryAddress');
$winner = '';
$maxUsers = 0;
foreach($emailAttributes as $attr) {
$count = $this->countUsersWithAttribute($attr);
if($count > $maxUsers) {
$maxUsers = $count;
$winner = $attr;
}
}
if($winner !== '') {
$this->applyFind('ldap_email_attr', $winner);
if($writeLog) {
\OCP\Util::writeLog('user_ldap', 'The mail attribute has ' .
'automatically been reset, because the original value ' .
'did not return any results.', \OCP\Util::INFO);
}
}
return $this->result;
}
/**
* @return WizardResult
* @throws \Exception
*/
public function determineAttributes() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$attributes = $this->getUserAttributes();
natcasesort($attributes);
$attributes = array_values($attributes);
$this->result->addOptions('ldap_loginfilter_attributes', $attributes);
$selected = $this->configuration->ldapLoginFilterAttributes;
if(is_array($selected) && !empty($selected)) {
$this->result->addChange('ldap_loginfilter_attributes', $selected);
}
return $this->result;
}
/**
* detects the available LDAP attributes
* @return array|false The instance's WizardResult instance
* @throws \Exception
*/
private function getUserAttributes() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$base = $this->configuration->ldapBase[0];
$filter = $this->configuration->ldapUserFilter;
$rr = $this->ldap->search($cr, $base, $filter, array(), 1, 1);
if(!$this->ldap->isResource($rr)) {
return false;
}
$er = $this->ldap->firstEntry($cr, $rr);
$attributes = $this->ldap->getAttributes($cr, $er);
$pureAttributes = array();
for($i = 0; $i < $attributes['count']; $i++) {
$pureAttributes[] = $attributes[$i];
}
return $pureAttributes;
}
/**
* detects the available LDAP groups
* @return WizardResult|false the instance's WizardResult instance
*/
public function determineGroupsForGroups() {
return $this->determineGroups('ldap_groupfilter_groups',
'ldapGroupFilterGroups',
false);
}
/**
* detects the available LDAP groups
* @return WizardResult|false the instance's WizardResult instance
*/
public function determineGroupsForUsers() {
return $this->determineGroups('ldap_userfilter_groups',
'ldapUserFilterGroups');
}
/**
* detects the available LDAP groups
* @param string $dbKey
* @param string $confKey
* @param bool $testMemberOf
* @return WizardResult|false the instance's WizardResult instance
* @throws \Exception
*/
private function determineGroups($dbKey, $confKey, $testMemberOf = true) {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
))) {
return false;
}
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$this->fetchGroups($dbKey, $confKey);
if($testMemberOf) {
$this->configuration->hasMemberOfFilterSupport = $this->testMemberOf();
$this->result->markChange();
if(!$this->configuration->hasMemberOfFilterSupport) {
throw new \Exception('memberOf is not supported by the server');
}
}
return $this->result;
}
/**
* fetches all groups from LDAP and adds them to the result object
*
* @param string $dbKey
* @param string $confKey
* @return array $groupEntries
* @throws \Exception
*/
public function fetchGroups($dbKey, $confKey) {
$obclasses = array('posixGroup', 'group', 'zimbraDistributionList', 'groupOfNames', 'groupOfUniqueNames');
$filterParts = array();
foreach($obclasses as $obclass) {
$filterParts[] = 'objectclass='.$obclass;
}
//we filter for everything
//- that looks like a group and
//- has the group display name set
$filter = $this->access->combineFilterWithOr($filterParts);
$filter = $this->access->combineFilterWithAnd(array($filter, 'cn=*'));
$groupNames = array();
$groupEntries = array();
$limit = 400;
$offset = 0;
do {
// we need to request dn additionally here, otherwise memberOf
// detection will fail later
$result = $this->access->searchGroups($filter, array('cn', 'dn'), $limit, $offset);
foreach($result as $item) {
if(!isset($item['cn']) && !is_array($item['cn']) && !isset($item['cn'][0])) {
// just in case - no issue known
continue;
}
$groupNames[] = $item['cn'][0];
$groupEntries[] = $item;
}
$offset += $limit;
} while ($this->access->hasMoreResults());
if(count($groupNames) > 0) {
natsort($groupNames);
$this->result->addOptions($dbKey, array_values($groupNames));
} else {
throw new \Exception(self::$l->t('Could not find the desired feature'));
}
$setFeatures = $this->configuration->$confKey;
if(is_array($setFeatures) && !empty($setFeatures)) {
//something is already configured? pre-select it.
$this->result->addChange($dbKey, $setFeatures);
}
return $groupEntries;
}
public function determineGroupMemberAssoc() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapGroupFilter',
))) {
return false;
}
$attribute = $this->detectGroupMemberAssoc();
if($attribute === false) {
return false;
}
$this->configuration->setConfiguration(array('ldapGroupMemberAssocAttr' => $attribute));
$this->result->addChange('ldap_group_member_assoc_attribute', $attribute);
return $this->result;
}
/**
* Detects the available object classes
* @return WizardResult|false the instance's WizardResult instance
* @throws \Exception
*/
public function determineGroupObjectClasses() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
))) {
return false;
}
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$obclasses = array('groupOfNames', 'groupOfUniqueNames', 'group', 'posixGroup', '*');
$this->determineFeature($obclasses,
'objectclass',
'ldap_groupfilter_objectclass',
'ldapGroupFilterObjectclass',
false);
return $this->result;
}
/**
* detects the available object classes
* @return WizardResult
* @throws \Exception
*/
public function determineUserObjectClasses() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
))) {
return false;
}
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$obclasses = array('inetOrgPerson', 'person', 'organizationalPerson',
'user', 'posixAccount', '*');
$filter = $this->configuration->ldapUserFilter;
//if filter is empty, it is probably the first time the wizard is called
//then, apply suggestions.
$this->determineFeature($obclasses,
'objectclass',
'ldap_userfilter_objectclass',
'ldapUserFilterObjectclass',
empty($filter));
return $this->result;
}
/**
* @return WizardResult|false
* @throws \Exception
*/
public function getGroupFilter() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
))) {
return false;
}
//make sure the use display name is set
$displayName = $this->configuration->ldapGroupDisplayName;
if ($displayName === '') {
$d = $this->configuration->getDefaults();
$this->applyFind('ldap_group_display_name',
$d['ldap_group_display_name']);
}
$filter = $this->composeLdapFilter(self::LFILTER_GROUP_LIST);
$this->applyFind('ldap_group_filter', $filter);
return $this->result;
}
/**
* @return WizardResult|false
* @throws \Exception
*/
public function getUserListFilter() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
))) {
return false;
}
//make sure the use display name is set
$displayName = $this->configuration->ldapUserDisplayName;
if ($displayName === '') {
$d = $this->configuration->getDefaults();
$this->applyFind('ldap_display_name', $d['ldap_display_name']);
}
$filter = $this->composeLdapFilter(self::LFILTER_USER_LIST);
if(!$filter) {
throw new \Exception('Cannot create filter');
}
$this->applyFind('ldap_userlist_filter', $filter);
return $this->result;
}
/**
* @return bool|WizardResult
* @throws \Exception
*/
public function getUserLoginFilter() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapUserFilter',
))) {
return false;
}
$filter = $this->composeLdapFilter(self::LFILTER_LOGIN);
if(!$filter) {
throw new \Exception('Cannot create filter');
}
$this->applyFind('ldap_login_filter', $filter);
return $this->result;
}
/**
* @return bool|WizardResult
* @param string $loginName
* @throws \Exception
*/
public function testLoginName($loginName) {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
'ldapBase',
'ldapLoginFilter',
))) {
return false;
}
$cr = $this->access->connection->getConnectionResource();
if(!$this->ldap->isResource($cr)) {
throw new \Exception('connection error');
}
if(mb_strpos($this->access->connection->ldapLoginFilter, '%uid', 0, 'UTF-8')
=== false) {
throw new \Exception('missing placeholder');
}
$users = $this->access->countUsersByLoginName($loginName);
if($this->ldap->errno($cr) !== 0) {
throw new \Exception($this->ldap->error($cr));
}
$filter = str_replace('%uid', $loginName, $this->access->connection->ldapLoginFilter);
$this->result->addChange('ldap_test_loginname', $users);
$this->result->addChange('ldap_test_effective_filter', $filter);
return $this->result;
}
/**
* Tries to determine the port, requires given Host, User DN and Password
* @return WizardResult|false WizardResult on success, false otherwise
* @throws \Exception
*/
public function guessPortAndTLS() {
if(!$this->checkRequirements(array('ldapHost',
))) {
return false;
}
$this->checkHost();
$portSettings = $this->getPortSettingsToTry();
if(!is_array($portSettings)) {
throw new \Exception(print_r($portSettings, true));
}
//proceed from the best configuration and return on first success
foreach($portSettings as $setting) {
$p = $setting['port'];
$t = $setting['tls'];
\OCP\Util::writeLog('user_ldap', 'Wiz: trying port '. $p . ', TLS '. $t, \OCP\Util::DEBUG);
//connectAndBind may throw Exception, it needs to be catched by the
//callee of this method
try {
$settingsFound = $this->connectAndBind($p, $t);
} catch (\Exception $e) {
// any reply other than -1 (= cannot connect) is already okay,
// because then we found the server
// unavailable startTLS returns -11
if($e->getCode() > 0) {
$settingsFound = true;
} else {
throw $e;
}
}
if ($settingsFound === true) {
$config = array(
'ldapPort' => $p,
'ldapTLS' => intval($t)
);
$this->configuration->setConfiguration($config);
\OCP\Util::writeLog('user_ldap', 'Wiz: detected Port ' . $p, \OCP\Util::DEBUG);
$this->result->addChange('ldap_port', $p);
return $this->result;
}
}
//custom port, undetected (we do not brute force)
return false;
}
/**
* tries to determine a base dn from User DN or LDAP Host
* @return WizardResult|false WizardResult on success, false otherwise
*/
public function guessBaseDN() {
if(!$this->checkRequirements(array('ldapHost',
'ldapPort',
))) {
return false;
}
//check whether a DN is given in the agent name (99.9% of all cases)
$base = null;
$i = stripos($this->configuration->ldapAgentName, 'dc=');
if($i !== false) {
$base = substr($this->configuration->ldapAgentName, $i);
if($this->testBaseDN($base)) {
$this->applyFind('ldap_base', $base);
return $this->result;
}
}
//this did not help :(
//Let's see whether we can parse the Host URL and convert the domain to
//a base DN
$helper = new Helper(\OC::$server->getConfig());
$domain = $helper->getDomainFromURL($this->configuration->ldapHost);
if(!$domain) {
return false;
}
$dparts = explode('.', $domain);
while(count($dparts) > 0) {
$base2 = 'dc=' . implode(',dc=', $dparts);
if ($base !== $base2 && $this->testBaseDN($base2)) {
$this->applyFind('ldap_base', $base2);
return $this->result;
}
array_shift($dparts);
}
return false;
}
/**
* sets the found value for the configuration key in the WizardResult
* as well as in the Configuration instance
* @param string $key the configuration key
* @param string $value the (detected) value
*
*/
private function applyFind($key, $value) {
$this->result->addChange($key, $value);
$this->configuration->setConfiguration(array($key => $value));
}
/**
* Checks, whether a port was entered in the Host configuration
* field. In this case the port will be stripped off, but also stored as
* setting.
*/
private function checkHost() {
$host = $this->configuration->ldapHost;
$hostInfo = parse_url($host);
//removes Port from Host
if(is_array($hostInfo) && isset($hostInfo['port'])) {
$port = $hostInfo['port'];
$host = str_replace(':'.$port, '', $host);
$this->applyFind('ldap_host', $host);
$this->applyFind('ldap_port', $port);
}
}
/**
* tries to detect the group member association attribute which is
* one of 'uniqueMember', 'memberUid', 'member', 'gidNumber'
* @return string|false, string with the attribute name, false on error
* @throws \Exception
*/
private function detectGroupMemberAssoc() {
$possibleAttrs = array('uniqueMember', 'memberUid', 'member', 'gidNumber');
$filter = $this->configuration->ldapGroupFilter;
if(empty($filter)) {
return false;
}
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$base = $this->configuration->ldapBase[0];
$rr = $this->ldap->search($cr, $base, $filter, $possibleAttrs, 0, 1000);
if(!$this->ldap->isResource($rr)) {
return false;
}
$er = $this->ldap->firstEntry($cr, $rr);
while(is_resource($er)) {
$this->ldap->getDN($cr, $er);
$attrs = $this->ldap->getAttributes($cr, $er);
$result = array();
$possibleAttrsCount = count($possibleAttrs);
for($i = 0; $i < $possibleAttrsCount; $i++) {
if(isset($attrs[$possibleAttrs[$i]])) {
$result[$possibleAttrs[$i]] = $attrs[$possibleAttrs[$i]]['count'];
}
}
if(!empty($result)) {
natsort($result);
return key($result);
}
$er = $this->ldap->nextEntry($cr, $er);
}
return false;
}
/**
* Checks whether for a given BaseDN results will be returned
* @param string $base the BaseDN to test
* @return bool true on success, false otherwise
* @throws \Exception
*/
private function testBaseDN($base) {
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
//base is there, let's validate it. If we search for anything, we should
//get a result set > 0 on a proper base
$rr = $this->ldap->search($cr, $base, 'objectClass=*', array('dn'), 0, 1);
if(!$this->ldap->isResource($rr)) {
$errorNo = $this->ldap->errno($cr);
$errorMsg = $this->ldap->error($cr);
\OCP\Util::writeLog('user_ldap', 'Wiz: Could not search base '.$base.
' Error '.$errorNo.': '.$errorMsg, \OCP\Util::INFO);
return false;
}
$entries = $this->ldap->countEntries($cr, $rr);
return ($entries !== false) && ($entries > 0);
}
/**
* Checks whether the server supports memberOf in LDAP Filter.
* Note: at least in OpenLDAP, availability of memberOf is dependent on
* a configured objectClass. I.e. not necessarily for all available groups
* memberOf does work.
*
* @return bool true if it does, false otherwise
* @throws \Exception
*/
private function testMemberOf() {
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$result = $this->access->countUsers('memberOf=*', array('memberOf'), 1);
if(is_int($result) && $result > 0) {
return true;
}
return false;
}
/**
* creates an LDAP Filter from given configuration
* @param integer $filterType int, for which use case the filter shall be created
* can be any of self::LFILTER_USER_LIST, self::LFILTER_LOGIN or
* self::LFILTER_GROUP_LIST
* @return string|false string with the filter on success, false otherwise
* @throws \Exception
*/
private function composeLdapFilter($filterType) {
$filter = '';
$parts = 0;
switch ($filterType) {
case self::LFILTER_USER_LIST:
$objcs = $this->configuration->ldapUserFilterObjectclass;
//glue objectclasses
if(is_array($objcs) && count($objcs) > 0) {
$filter .= '(|';
foreach($objcs as $objc) {
$filter .= '(objectclass=' . $objc . ')';
}
$filter .= ')';
$parts++;
}
//glue group memberships
if($this->configuration->hasMemberOfFilterSupport) {
$cns = $this->configuration->ldapUserFilterGroups;
if(is_array($cns) && count($cns) > 0) {
$filter .= '(|';
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$base = $this->configuration->ldapBase[0];
foreach($cns as $cn) {
$rr = $this->ldap->search($cr, $base, 'cn=' . $cn, array('dn', 'primaryGroupToken'));
if(!$this->ldap->isResource($rr)) {
continue;
}
$er = $this->ldap->firstEntry($cr, $rr);
$attrs = $this->ldap->getAttributes($cr, $er);
$dn = $this->ldap->getDN($cr, $er);
if ($dn === false || $dn === '') {
continue;
}
$filterPart = '(memberof=' . $dn . ')';
if(isset($attrs['primaryGroupToken'])) {
$pgt = $attrs['primaryGroupToken'][0];
$primaryFilterPart = '(primaryGroupID=' . $pgt .')';
$filterPart = '(|' . $filterPart . $primaryFilterPart . ')';
}
$filter .= $filterPart;
}
$filter .= ')';
}
$parts++;
}
//wrap parts in AND condition
if($parts > 1) {
$filter = '(&' . $filter . ')';
}
if ($filter === '') {
$filter = '(objectclass=*)';
}
break;
case self::LFILTER_GROUP_LIST:
$objcs = $this->configuration->ldapGroupFilterObjectclass;
//glue objectclasses
if(is_array($objcs) && count($objcs) > 0) {
$filter .= '(|';
foreach($objcs as $objc) {
$filter .= '(objectclass=' . $objc . ')';
}
$filter .= ')';
$parts++;
}
//glue group memberships
$cns = $this->configuration->ldapGroupFilterGroups;
if(is_array($cns) && count($cns) > 0) {
$filter .= '(|';
foreach($cns as $cn) {
$filter .= '(cn=' . $cn . ')';
}
$filter .= ')';
}
$parts++;
//wrap parts in AND condition
if($parts > 1) {
$filter = '(&' . $filter . ')';
}
break;
case self::LFILTER_LOGIN:
$ulf = $this->configuration->ldapUserFilter;
$loginpart = '=%uid';
$filterUsername = '';
$userAttributes = $this->getUserAttributes();
$userAttributes = array_change_key_case(array_flip($userAttributes));
$parts = 0;
if($this->configuration->ldapLoginFilterUsername === '1') {
$attr = '';
if(isset($userAttributes['uid'])) {
$attr = 'uid';
} else if(isset($userAttributes['samaccountname'])) {
$attr = 'samaccountname';
} else if(isset($userAttributes['cn'])) {
//fallback
$attr = 'cn';
}
if ($attr !== '') {
$filterUsername = '(' . $attr . $loginpart . ')';
$parts++;
}
}
$filterEmail = '';
if($this->configuration->ldapLoginFilterEmail === '1') {
$filterEmail = '(|(mailPrimaryAddress=%uid)(mail=%uid))';
$parts++;
}
$filterAttributes = '';
$attrsToFilter = $this->configuration->ldapLoginFilterAttributes;
if(is_array($attrsToFilter) && count($attrsToFilter) > 0) {
$filterAttributes = '(|';
foreach($attrsToFilter as $attribute) {
$filterAttributes .= '(' . $attribute . $loginpart . ')';
}
$filterAttributes .= ')';
$parts++;
}
$filterLogin = '';
if($parts > 1) {
$filterLogin = '(|';
}
$filterLogin .= $filterUsername;
$filterLogin .= $filterEmail;
$filterLogin .= $filterAttributes;
if($parts > 1) {
$filterLogin .= ')';
}
$filter = '(&'.$ulf.$filterLogin.')';
break;
}
\OCP\Util::writeLog('user_ldap', 'Wiz: Final filter '.$filter, \OCP\Util::DEBUG);
return $filter;
}
/**
* Connects and Binds to an LDAP Server
*
* @param int $port the port to connect with
* @param bool $tls whether startTLS is to be used
* @return bool
* @throws \Exception
*/
private function connectAndBind($port, $tls) {
//connect, does not really trigger any server communication
$host = $this->configuration->ldapHost;
$hostInfo = parse_url($host);
if(!$hostInfo) {
throw new \Exception(self::$l->t('Invalid Host'));
}
\OCP\Util::writeLog('user_ldap', 'Wiz: Attempting to connect ', \OCP\Util::DEBUG);
$cr = $this->ldap->connect($host, $port);
if(!is_resource($cr)) {
throw new \Exception(self::$l->t('Invalid Host'));
}
//set LDAP options
$this->ldap->setOption($cr, LDAP_OPT_PROTOCOL_VERSION, 3);
$this->ldap->setOption($cr, LDAP_OPT_REFERRALS, 0);
$this->ldap->setOption($cr, LDAP_OPT_NETWORK_TIMEOUT, self::LDAP_NW_TIMEOUT);
try {
if($tls) {
$isTlsWorking = @$this->ldap->startTls($cr);
if(!$isTlsWorking) {
return false;
}
}
\OCP\Util::writeLog('user_ldap', 'Wiz: Attemping to Bind ', \OCP\Util::DEBUG);
//interesting part: do the bind!
$login = $this->ldap->bind($cr,
$this->configuration->ldapAgentName,
$this->configuration->ldapAgentPassword
);
$errNo = $this->ldap->errno($cr);
$error = ldap_error($cr);
$this->ldap->unbind($cr);
} catch(ServerNotAvailableException $e) {
return false;
}
if($login === true) {
$this->ldap->unbind($cr);
\OCP\Util::writeLog('user_ldap', 'Wiz: Bind successful to Port '. $port . ' TLS ' . intval($tls), \OCP\Util::DEBUG);
return true;
}
if($errNo === -1) {
//host, port or TLS wrong
return false;
}
throw new \Exception($error, $errNo);
}
/**
* checks whether a valid combination of agent and password has been
* provided (either two values or nothing for anonymous connect)
* @return bool, true if everything is fine, false otherwise
*/
private function checkAgentRequirements() {
$agent = $this->configuration->ldapAgentName;
$pwd = $this->configuration->ldapAgentPassword;
return
($agent !== '' && $pwd !== '')
|| ($agent === '' && $pwd === '')
;
}
/**
* @param array $reqs
* @return bool
*/
private function checkRequirements($reqs) {
$this->checkAgentRequirements();
foreach($reqs as $option) {
$value = $this->configuration->$option;
if(empty($value)) {
return false;
}
}
return true;
}
/**
* does a cumulativeSearch on LDAP to get different values of a
* specified attribute
* @param string[] $filters array, the filters that shall be used in the search
* @param string $attr the attribute of which a list of values shall be returned
* @param int $dnReadLimit the amount of how many DNs should be analyzed.
* The lower, the faster
* @param string $maxF string. if not null, this variable will have the filter that
* yields most result entries
* @return array|false an array with the values on success, false otherwise
*/
public function cumulativeSearchOnAttribute($filters, $attr, $dnReadLimit = 3, &$maxF = null) {
$dnRead = array();
$foundItems = array();
$maxEntries = 0;
if(!is_array($this->configuration->ldapBase)
|| !isset($this->configuration->ldapBase[0])) {
return false;
}
$base = $this->configuration->ldapBase[0];
$cr = $this->getConnection();
if(!$this->ldap->isResource($cr)) {
return false;
}
$lastFilter = null;
if(isset($filters[count($filters)-1])) {
$lastFilter = $filters[count($filters)-1];
}
foreach($filters as $filter) {
if($lastFilter === $filter && count($foundItems) > 0) {
//skip when the filter is a wildcard and results were found
continue;
}
// 20k limit for performance and reason
$rr = $this->ldap->search($cr, $base, $filter, array($attr), 0, 20000);
if(!$this->ldap->isResource($rr)) {
continue;
}
$entries = $this->ldap->countEntries($cr, $rr);
$getEntryFunc = 'firstEntry';
if(($entries !== false) && ($entries > 0)) {
if(!is_null($maxF) && $entries > $maxEntries) {
$maxEntries = $entries;
$maxF = $filter;
}
$dnReadCount = 0;
do {
$entry = $this->ldap->$getEntryFunc($cr, $rr);
$getEntryFunc = 'nextEntry';
if(!$this->ldap->isResource($entry)) {
continue 2;
}
$rr = $entry; //will be expected by nextEntry next round
$attributes = $this->ldap->getAttributes($cr, $entry);
$dn = $this->ldap->getDN($cr, $entry);
if($dn === false || in_array($dn, $dnRead)) {
continue;
}
$newItems = array();
$state = $this->getAttributeValuesFromEntry($attributes,
$attr,
$newItems);
$dnReadCount++;
$foundItems = array_merge($foundItems, $newItems);
$this->resultCache[$dn][$attr] = $newItems;
$dnRead[] = $dn;
} while(($state === self::LRESULT_PROCESSED_SKIP
|| $this->ldap->isResource($entry))
&& ($dnReadLimit === 0 || $dnReadCount < $dnReadLimit));
}
}
return array_unique($foundItems);
}
/**
* determines if and which $attr are available on the LDAP server
* @param string[] $objectclasses the objectclasses to use as search filter
* @param string $attr the attribute to look for
* @param string $dbkey the dbkey of the setting the feature is connected to
* @param string $confkey the confkey counterpart for the $dbkey as used in the
* Configuration class
* @param bool $po whether the objectClass with most result entries
* shall be pre-selected via the result
* @return array|false list of found items.
* @throws \Exception
*/
private function determineFeature($objectclasses, $attr, $dbkey, $confkey, $po = false) {
$cr = $this->getConnection();
if(!$cr) {
throw new \Exception('Could not connect to LDAP');
}
$p = 'objectclass=';
foreach($objectclasses as $key => $value) {
$objectclasses[$key] = $p.$value;
}
$maxEntryObjC = '';
//how deep to dig?
//When looking for objectclasses, testing few entries is sufficient,
$dig = 3;
$availableFeatures =
$this->cumulativeSearchOnAttribute($objectclasses, $attr,
$dig, $maxEntryObjC);
if(is_array($availableFeatures)
&& count($availableFeatures) > 0) {
natcasesort($availableFeatures);
//natcasesort keeps indices, but we must get rid of them for proper
//sorting in the web UI. Therefore: array_values
$this->result->addOptions($dbkey, array_values($availableFeatures));
} else {
throw new \Exception(self::$l->t('Could not find the desired feature'));
}
$setFeatures = $this->configuration->$confkey;
if(is_array($setFeatures) && !empty($setFeatures)) {
//something is already configured? pre-select it.
$this->result->addChange($dbkey, $setFeatures);
} else if ($po && $maxEntryObjC !== '') {
//pre-select objectclass with most result entries
$maxEntryObjC = str_replace($p, '', $maxEntryObjC);
$this->applyFind($dbkey, $maxEntryObjC);
$this->result->addChange($dbkey, $maxEntryObjC);
}
return $availableFeatures;
}
/**
* appends a list of values fr
* @param resource $result the return value from ldap_get_attributes
* @param string $attribute the attribute values to look for
* @param array &$known new values will be appended here
* @return int, state on of the class constants LRESULT_PROCESSED_OK,
* LRESULT_PROCESSED_INVALID or LRESULT_PROCESSED_SKIP
*/
private function getAttributeValuesFromEntry($result, $attribute, &$known) {
if(!is_array($result)
|| !isset($result['count'])
|| !$result['count'] > 0) {
return self::LRESULT_PROCESSED_INVALID;
}
// strtolower on all keys for proper comparison
$result = \OCP\Util::mb_array_change_key_case($result);
$attribute = strtolower($attribute);
if(isset($result[$attribute])) {
foreach($result[$attribute] as $key => $val) {
if($key === 'count') {
continue;
}
if(!in_array($val, $known)) {
$known[] = $val;
}
}
return self::LRESULT_PROCESSED_OK;
} else {
return self::LRESULT_PROCESSED_SKIP;
}
}
/**
* @return bool|mixed
*/
private function getConnection() {
if(!is_null($this->cr)) {
return $this->cr;
}
$cr = $this->ldap->connect(
$this->configuration->ldapHost,
$this->configuration->ldapPort
);
$this->ldap->setOption($cr, LDAP_OPT_PROTOCOL_VERSION, 3);
$this->ldap->setOption($cr, LDAP_OPT_REFERRALS, 0);
$this->ldap->setOption($cr, LDAP_OPT_NETWORK_TIMEOUT, self::LDAP_NW_TIMEOUT);
if($this->configuration->ldapTLS === 1) {
$this->ldap->startTls($cr);
}
$lo = @$this->ldap->bind($cr,
$this->configuration->ldapAgentName,
$this->configuration->ldapAgentPassword);
if($lo === true) {
$this->$cr = $cr;
return $cr;
}
return false;
}
/**
* @return array
*/
private function getDefaultLdapPortSettings() {
static $settings = array(
array('port' => 7636, 'tls' => false),
array('port' => 636, 'tls' => false),
array('port' => 7389, 'tls' => true),
array('port' => 389, 'tls' => true),
array('port' => 7389, 'tls' => false),
array('port' => 389, 'tls' => false),
);
return $settings;
}
/**
* @return array
*/
private function getPortSettingsToTry() {
//389 ← LDAP / Unencrypted or StartTLS
//636 ← LDAPS / SSL
//7xxx ← UCS. need to be checked first, because both ports may be open
$host = $this->configuration->ldapHost;
$port = intval($this->configuration->ldapPort);
$portSettings = array();
//In case the port is already provided, we will check this first
if($port > 0) {
$hostInfo = parse_url($host);
if(!(is_array($hostInfo)
&& isset($hostInfo['scheme'])
&& stripos($hostInfo['scheme'], 'ldaps') !== false)) {
$portSettings[] = array('port' => $port, 'tls' => true);
}
$portSettings[] =array('port' => $port, 'tls' => false);
}
//default ports
$portSettings = array_merge($portSettings,
$this->getDefaultLdapPortSettings());
return $portSettings;
}
}