mirror of
https://github.com/nextcloud/server.git
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731 lines
21 KiB
PHP
731 lines
21 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OCA\User_LDAP;
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use OC\ServerNotAvailableException;
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use OCP\ICache;
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use Psr\Log\LoggerInterface;
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/**
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* magic properties
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* responsible for LDAP connections in context with the provided configuration
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*
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* @property string $ldapHost
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* @property string $ldapPort
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* @property string $ldapBackupHost
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* @property string $ldapBackupPort
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* @property string $ldapBackgroundHost
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* @property string $ldapBackgroundPort
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* @property array|'' $ldapBase
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* @property array|'' $ldapBaseUsers
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* @property array|'' $ldapBaseGroups
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* @property string $ldapAgentName
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* @property string $ldapAgentPassword
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* @property string $ldapTLS
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* @property string $turnOffCertCheck
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* @property string $ldapIgnoreNamingRules
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* @property string $ldapUserDisplayName
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* @property string $ldapUserDisplayName2
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* @property string $ldapUserAvatarRule
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* @property string $ldapGidNumber
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* @property array|'' $ldapUserFilterObjectclass
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* @property array|'' $ldapUserFilterGroups
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* @property string $ldapUserFilter
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* @property string $ldapUserFilterMode
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* @property string $ldapGroupFilter
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* @property string $ldapGroupFilterMode
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* @property array|'' $ldapGroupFilterObjectclass
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* @property array|'' $ldapGroupFilterGroups
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* @property string $ldapGroupDisplayName
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* @property string $ldapGroupMemberAssocAttr
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* @property string $ldapLoginFilter
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* @property string $ldapLoginFilterMode
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* @property string $ldapLoginFilterEmail
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* @property string $ldapLoginFilterUsername
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* @property array|'' $ldapLoginFilterAttributes
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* @property string $ldapQuotaAttribute
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* @property string $ldapQuotaDefault
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* @property string $ldapEmailAttribute
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* @property string $ldapCacheTTL
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* @property string $ldapUuidUserAttribute
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* @property string $ldapUuidGroupAttribute
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* @property string $ldapOverrideMainServer
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* @property string $ldapConfigurationActive
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* @property array|'' $ldapAttributesForUserSearch
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* @property array|'' $ldapAttributesForGroupSearch
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* @property string $ldapExperiencedAdmin
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* @property string $homeFolderNamingRule
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* @property string $hasMemberOfFilterSupport
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* @property string $useMemberOfToDetectMembership
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* @property string $ldapExpertUsernameAttr
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* @property string $ldapExpertUUIDUserAttr
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* @property string $ldapExpertUUIDGroupAttr
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* @property string $markRemnantsAsDisabled
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* @property string $lastJpegPhotoLookup
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* @property string $ldapNestedGroups
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* @property string $ldapPagingSize
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* @property string $turnOnPasswordChange
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* @property string $ldapDynamicGroupMemberURL
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* @property string $ldapDefaultPPolicyDN
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* @property string $ldapExtStorageHomeAttribute
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* @property string $ldapMatchingRuleInChainState
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* @property string $ldapConnectionTimeout
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* @property string $ldapAttributePhone
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* @property string $ldapAttributeWebsite
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* @property string $ldapAttributeAddress
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* @property string $ldapAttributeTwitter
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* @property string $ldapAttributeFediverse
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* @property string $ldapAttributeOrganisation
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* @property string $ldapAttributeRole
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* @property string $ldapAttributeHeadline
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* @property string $ldapAttributeBiography
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* @property string $ldapAdminGroup
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* @property string $ldapAttributeBirthDate
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* @property string $ldapAttributePronouns
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*/
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class Connection extends LDAPUtility {
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private ?\LDAP\Connection $ldapConnectionRes = null;
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private bool $configured = false;
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/**
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* @var bool whether connection should be kept on __destruct
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*/
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private bool $dontDestruct = false;
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/**
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* @var bool runtime flag that indicates whether supported primary groups are available
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*/
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public $hasPrimaryGroups = true;
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/**
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* @var bool runtime flag that indicates whether supported POSIX gidNumber are available
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*/
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public $hasGidNumber = true;
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/**
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* @var ICache|null
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*/
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protected $cache = null;
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/** @var Configuration settings handler * */
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protected $configuration;
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/**
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* @var bool
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*/
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protected $doNotValidate = false;
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/**
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* @var bool
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*/
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protected $ignoreValidation = false;
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/**
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* @var array{sum?: string, result?: bool}
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*/
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protected $bindResult = [];
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/** @var LoggerInterface */
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protected $logger;
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/**
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* Constructor
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* @param string $configPrefix a string with the prefix for the configkey column (appconfig table)
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* @param string|null $configID a string with the value for the appid column (appconfig table) or null for on-the-fly connections
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*/
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public function __construct(
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ILDAPWrapper $ldap,
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private string $configPrefix = '',
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private ?string $configID = 'user_ldap',
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) {
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parent::__construct($ldap);
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$this->configuration = new Configuration($this->configPrefix, !is_null($this->configID));
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$memcache = \OC::$server->getMemCacheFactory();
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if ($memcache->isAvailable()) {
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$this->cache = $memcache->createDistributed();
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}
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$helper = new Helper(\OC::$server->getConfig(), \OC::$server->getDatabaseConnection());
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$this->doNotValidate = !in_array($this->configPrefix,
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$helper->getServerConfigurationPrefixes());
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$this->logger = \OC::$server->get(LoggerInterface::class);
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}
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public function __destruct() {
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if (!$this->dontDestruct && $this->ldap->isResource($this->ldapConnectionRes)) {
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@$this->ldap->unbind($this->ldapConnectionRes);
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$this->bindResult = [];
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}
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}
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/**
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* defines behaviour when the instance is cloned
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*/
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public function __clone() {
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$this->configuration = new Configuration($this->configPrefix,
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!is_null($this->configID));
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if (count($this->bindResult) !== 0 && $this->bindResult['result'] === true) {
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$this->bindResult = [];
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}
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$this->ldapConnectionRes = null;
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$this->dontDestruct = true;
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}
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public function __get(string $name) {
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if (!$this->configured) {
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$this->readConfiguration();
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}
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return $this->configuration->$name;
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}
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/**
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* @param string $name
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* @param mixed $value
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*/
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public function __set($name, $value) {
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$this->doNotValidate = false;
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$before = $this->configuration->$name;
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$this->configuration->$name = $value;
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$after = $this->configuration->$name;
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if ($before !== $after) {
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if ($this->configID !== '' && $this->configID !== null) {
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$this->configuration->saveConfiguration();
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}
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$this->validateConfiguration();
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}
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}
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/**
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* @param string $rule
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* @return array
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* @throws \RuntimeException
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*/
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public function resolveRule($rule) {
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return $this->configuration->resolveRule($rule);
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}
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/**
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* sets whether the result of the configuration validation shall
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* be ignored when establishing the connection. Used by the Wizard
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* in early configuration state.
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* @param bool $state
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*/
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public function setIgnoreValidation($state) {
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$this->ignoreValidation = (bool)$state;
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}
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/**
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* initializes the LDAP backend
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* @param bool $force read the config settings no matter what
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*/
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public function init($force = false) {
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$this->readConfiguration($force);
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$this->establishConnection();
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}
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/**
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* @return \LDAP\Connection The LDAP resource
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*/
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public function getConnectionResource(): \LDAP\Connection {
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if (!$this->ldapConnectionRes) {
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$this->init();
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}
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if (is_null($this->ldapConnectionRes)) {
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$this->logger->error(
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'No LDAP Connection to server ' . $this->configuration->ldapHost,
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['app' => 'user_ldap']
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);
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throw new ServerNotAvailableException('Connection to LDAP server could not be established');
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}
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return $this->ldapConnectionRes;
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}
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/**
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* resets the connection resource
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*/
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public function resetConnectionResource(): void {
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if (!is_null($this->ldapConnectionRes)) {
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@$this->ldap->unbind($this->ldapConnectionRes);
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$this->ldapConnectionRes = null;
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$this->bindResult = [];
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}
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}
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/**
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* @param string|null $key
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*/
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private function getCacheKey($key): string {
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$prefix = 'LDAP-' . $this->configID . '-' . $this->configPrefix . '-';
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if (is_null($key)) {
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return $prefix;
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}
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return $prefix . hash('sha256', $key);
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}
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/**
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* @param string $key
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* @return mixed|null
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*/
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public function getFromCache($key) {
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if (!$this->configured) {
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$this->readConfiguration();
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}
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if (is_null($this->cache) || !$this->configuration->ldapCacheTTL) {
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return null;
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}
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$key = $this->getCacheKey($key);
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return json_decode(base64_decode($this->cache->get($key) ?? ''), true);
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}
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public function getConfigPrefix(): string {
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return $this->configPrefix;
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}
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/**
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* @param string $key
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* @param mixed $value
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*/
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public function writeToCache($key, $value, ?int $ttlOverride = null): void {
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if (!$this->configured) {
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$this->readConfiguration();
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}
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if (is_null($this->cache)
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|| !$this->configuration->ldapCacheTTL
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|| !$this->configuration->ldapConfigurationActive) {
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return;
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}
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$key = $this->getCacheKey($key);
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$value = base64_encode(json_encode($value));
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$ttl = $ttlOverride ?? $this->configuration->ldapCacheTTL;
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$this->cache->set($key, $value, $ttl);
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}
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public function clearCache() {
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if (!is_null($this->cache)) {
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$this->cache->clear($this->getCacheKey(null));
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}
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}
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/**
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* Caches the general LDAP configuration.
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* @param bool $force optional. true, if the re-read should be forced. defaults
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* to false.
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*/
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private function readConfiguration(bool $force = false): void {
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if ((!$this->configured || $force) && !is_null($this->configID)) {
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$this->configuration->readConfiguration();
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$this->configured = $this->validateConfiguration();
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}
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}
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/**
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* set LDAP configuration with values delivered by an array, not read from configuration
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* @param array $config array that holds the config parameters in an associated array
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* @param array &$setParameters optional; array where the set fields will be given to
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* @return bool true if config validates, false otherwise. Check with $setParameters for detailed success on single parameters
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*/
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public function setConfiguration($config, &$setParameters = null): bool {
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if (is_null($setParameters)) {
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$setParameters = [];
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}
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$this->doNotValidate = false;
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$this->configuration->setConfiguration($config, $setParameters);
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if (count($setParameters) > 0) {
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$this->configured = $this->validateConfiguration();
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}
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return $this->configured;
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}
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/**
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* saves the current Configuration in the database and empties the
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* cache
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* @return null
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*/
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public function saveConfiguration() {
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$this->configuration->saveConfiguration();
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$this->clearCache();
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}
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/**
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* get the current LDAP configuration
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* @return array
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*/
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public function getConfiguration() {
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$this->readConfiguration();
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$config = $this->configuration->getConfiguration();
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$cta = $this->configuration->getConfigTranslationArray();
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$result = [];
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foreach ($cta as $dbkey => $configkey) {
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switch ($configkey) {
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case 'homeFolderNamingRule':
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if (str_starts_with($config[$configkey], 'attr:')) {
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$result[$dbkey] = substr($config[$configkey], 5);
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} else {
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$result[$dbkey] = '';
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}
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break;
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case 'ldapBase':
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case 'ldapBaseUsers':
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case 'ldapBaseGroups':
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case 'ldapAttributesForUserSearch':
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case 'ldapAttributesForGroupSearch':
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if (is_array($config[$configkey])) {
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$result[$dbkey] = implode("\n", $config[$configkey]);
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break;
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} //else follows default
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// no break
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default:
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$result[$dbkey] = $config[$configkey];
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}
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}
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return $result;
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}
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private function doSoftValidation(): void {
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//if User or Group Base are not set, take over Base DN setting
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foreach (['ldapBaseUsers', 'ldapBaseGroups'] as $keyBase) {
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$val = $this->configuration->$keyBase;
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if (empty($val)) {
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$this->configuration->$keyBase = $this->configuration->ldapBase;
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}
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}
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foreach (['ldapExpertUUIDUserAttr' => 'ldapUuidUserAttribute',
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'ldapExpertUUIDGroupAttr' => 'ldapUuidGroupAttribute'] as $expertSetting => $effectiveSetting) {
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$uuidOverride = $this->configuration->$expertSetting;
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if (!empty($uuidOverride)) {
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$this->configuration->$effectiveSetting = $uuidOverride;
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} else {
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$uuidAttributes = Access::UUID_ATTRIBUTES;
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array_unshift($uuidAttributes, 'auto');
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if (!in_array($this->configuration->$effectiveSetting, $uuidAttributes)
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&& !is_null($this->configID)) {
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$this->configuration->$effectiveSetting = 'auto';
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$this->configuration->saveConfiguration();
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$this->logger->info(
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'Illegal value for the ' . $effectiveSetting . ', reset to autodetect.',
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['app' => 'user_ldap']
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);
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}
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}
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}
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$backupPort = (int)$this->configuration->ldapBackupPort;
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if ($backupPort <= 0) {
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$this->configuration->ldapBackupPort = $this->configuration->ldapPort;
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}
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//make sure empty search attributes are saved as simple, empty array
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$saKeys = ['ldapAttributesForUserSearch',
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'ldapAttributesForGroupSearch'];
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foreach ($saKeys as $key) {
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$val = $this->configuration->$key;
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if (is_array($val) && count($val) === 1 && empty($val[0])) {
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$this->configuration->$key = [];
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}
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}
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if ((stripos((string)$this->configuration->ldapHost, 'ldaps://') === 0)
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&& $this->configuration->ldapTLS) {
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$this->configuration->ldapTLS = (string)false;
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$this->logger->info(
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'LDAPS (already using secure connection) and TLS do not work together. Switched off TLS.',
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['app' => 'user_ldap']
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);
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}
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}
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private function doCriticalValidation(): bool {
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$configurationOK = true;
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$errorStr = 'Configuration Error (prefix ' . $this->configPrefix . '): ';
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//options that shall not be empty
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$options = ['ldapHost', 'ldapUserDisplayName',
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'ldapGroupDisplayName', 'ldapLoginFilter'];
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//ldapPort should not be empty either unless ldapHost is pointing to a socket
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if (!$this->configuration->usesLdapi()) {
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$options[] = 'ldapPort';
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}
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foreach ($options as $key) {
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$val = $this->configuration->$key;
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if (empty($val)) {
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switch ($key) {
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case 'ldapHost':
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$subj = 'LDAP Host';
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break;
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case 'ldapPort':
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$subj = 'LDAP Port';
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break;
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case 'ldapUserDisplayName':
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$subj = 'LDAP User Display Name';
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break;
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case 'ldapGroupDisplayName':
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$subj = 'LDAP Group Display Name';
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break;
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case 'ldapLoginFilter':
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$subj = 'LDAP Login Filter';
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break;
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default:
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$subj = $key;
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break;
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}
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$configurationOK = false;
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$this->logger->warning(
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$errorStr . 'No ' . $subj . ' given!',
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['app' => 'user_ldap']
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);
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}
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}
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//combinations
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$agent = $this->configuration->ldapAgentName;
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$pwd = $this->configuration->ldapAgentPassword;
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if (
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($agent === '' && $pwd !== '')
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|| ($agent !== '' && $pwd === '')
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) {
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$this->logger->warning(
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$errorStr . 'either no password is given for the user ' .
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'agent or a password is given, but not an LDAP agent.',
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['app' => 'user_ldap']
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);
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$configurationOK = false;
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}
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$base = $this->configuration->ldapBase;
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$baseUsers = $this->configuration->ldapBaseUsers;
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$baseGroups = $this->configuration->ldapBaseGroups;
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if (empty($base) && empty($baseUsers) && empty($baseGroups)) {
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$this->logger->warning(
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$errorStr . 'Not a single Base DN given.',
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['app' => 'user_ldap']
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);
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$configurationOK = false;
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}
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if (mb_strpos((string)$this->configuration->ldapLoginFilter, '%uid', 0, 'UTF-8')
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=== false) {
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$this->logger->warning(
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$errorStr . 'login filter does not contain %uid place holder.',
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['app' => 'user_ldap']
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);
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$configurationOK = false;
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}
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return $configurationOK;
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}
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|
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/**
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* Validates the user specified configuration
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* @return bool true if configuration seems OK, false otherwise
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*/
|
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private function validateConfiguration(): bool {
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if ($this->doNotValidate) {
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//don't do a validation if it is a new configuration with pure
|
|
//default values. Will be allowed on changes via __set or
|
|
//setConfiguration
|
|
return false;
|
|
}
|
|
|
|
// first step: "soft" checks: settings that are not really
|
|
// necessary, but advisable. If left empty, give an info message
|
|
$this->doSoftValidation();
|
|
|
|
//second step: critical checks. If left empty or filled wrong, mark as
|
|
//not configured and give a warning.
|
|
return $this->doCriticalValidation();
|
|
}
|
|
|
|
|
|
/**
|
|
* Connects and Binds to LDAP
|
|
*
|
|
* @throws ServerNotAvailableException
|
|
*/
|
|
private function establishConnection(): ?bool {
|
|
if (!$this->configuration->ldapConfigurationActive) {
|
|
return null;
|
|
}
|
|
static $phpLDAPinstalled = true;
|
|
if (!$phpLDAPinstalled) {
|
|
return false;
|
|
}
|
|
if (!$this->ignoreValidation && !$this->configured) {
|
|
$this->logger->warning(
|
|
'Configuration is invalid, cannot connect',
|
|
['app' => 'user_ldap']
|
|
);
|
|
return false;
|
|
}
|
|
if (!$this->ldapConnectionRes) {
|
|
if (!$this->ldap->areLDAPFunctionsAvailable()) {
|
|
$phpLDAPinstalled = false;
|
|
$this->logger->error(
|
|
'function ldap_connect is not available. Make sure that the PHP ldap module is installed.',
|
|
['app' => 'user_ldap']
|
|
);
|
|
|
|
return false;
|
|
}
|
|
if ($this->configuration->turnOffCertCheck) {
|
|
if (putenv('LDAPTLS_REQCERT=never')) {
|
|
$this->logger->debug(
|
|
'Turned off SSL certificate validation successfully.',
|
|
['app' => 'user_ldap']
|
|
);
|
|
} else {
|
|
$this->logger->warning(
|
|
'Could not turn off SSL certificate validation.',
|
|
['app' => 'user_ldap']
|
|
);
|
|
}
|
|
}
|
|
|
|
$hasBackupHost = (trim($this->configuration->ldapBackupHost ?? '') !== '');
|
|
$hasBackgroundHost = (trim($this->configuration->ldapBackgroundHost ?? '') !== '');
|
|
$useBackgroundHost = (\OC::$CLI && $hasBackgroundHost);
|
|
$overrideCacheKey = ($useBackgroundHost ? 'overrideBackgroundServer' : 'overrideMainServer');
|
|
$forceBackupHost = ($this->configuration->ldapOverrideMainServer || $this->getFromCache($overrideCacheKey));
|
|
$bindStatus = false;
|
|
if (!$forceBackupHost) {
|
|
try {
|
|
$host = $this->configuration->ldapHost ?? '';
|
|
$port = $this->configuration->ldapPort ?? '';
|
|
if ($useBackgroundHost) {
|
|
$host = $this->configuration->ldapBackgroundHost ?? '';
|
|
$port = $this->configuration->ldapBackgroundPort ?? '';
|
|
}
|
|
$this->doConnect($host, $port);
|
|
return $this->bind();
|
|
} catch (ServerNotAvailableException $e) {
|
|
if (!$hasBackupHost) {
|
|
throw $e;
|
|
}
|
|
}
|
|
$this->logger->warning(
|
|
'Main LDAP not reachable, connecting to backup',
|
|
[
|
|
'app' => 'user_ldap'
|
|
]
|
|
);
|
|
}
|
|
|
|
// if LDAP server is not reachable, try the Backup (Replica!) Server
|
|
$this->doConnect($this->configuration->ldapBackupHost ?? '', $this->configuration->ldapBackupPort ?? '');
|
|
$this->bindResult = [];
|
|
$bindStatus = $this->bind();
|
|
$error = $this->ldap->isResource($this->ldapConnectionRes) ?
|
|
$this->ldap->errno($this->ldapConnectionRes) : -1;
|
|
if ($bindStatus && $error === 0 && !$forceBackupHost) {
|
|
//when bind to backup server succeeded and failed to main server,
|
|
//skip contacting it for 15min
|
|
$this->writeToCache($overrideCacheKey, true, 60 * 15);
|
|
}
|
|
|
|
return $bindStatus;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* @param string $host
|
|
* @param string $port
|
|
* @throws \OC\ServerNotAvailableException
|
|
*/
|
|
private function doConnect($host, $port): bool {
|
|
if ($host === '') {
|
|
return false;
|
|
}
|
|
|
|
$this->ldapConnectionRes = $this->ldap->connect($host, $port) ?: null;
|
|
|
|
if ($this->ldapConnectionRes === null) {
|
|
throw new ServerNotAvailableException('Connection failed');
|
|
}
|
|
|
|
if (!$this->ldap->setOption($this->ldapConnectionRes, LDAP_OPT_PROTOCOL_VERSION, 3)) {
|
|
throw new ServerNotAvailableException('Could not set required LDAP Protocol version.');
|
|
}
|
|
|
|
if (!$this->ldap->setOption($this->ldapConnectionRes, LDAP_OPT_REFERRALS, 0)) {
|
|
throw new ServerNotAvailableException('Could not disable LDAP referrals.');
|
|
}
|
|
|
|
if (!$this->ldap->setOption($this->ldapConnectionRes, LDAP_OPT_NETWORK_TIMEOUT, $this->configuration->ldapConnectionTimeout)) {
|
|
throw new ServerNotAvailableException('Could not set network timeout');
|
|
}
|
|
|
|
if ($this->configuration->ldapTLS) {
|
|
if (!$this->ldap->startTls($this->ldapConnectionRes)) {
|
|
throw new ServerNotAvailableException('Start TLS failed, when connecting to LDAP host ' . $host . '.');
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Binds to LDAP
|
|
*/
|
|
public function bind() {
|
|
if (!$this->configuration->ldapConfigurationActive) {
|
|
return false;
|
|
}
|
|
$cr = $this->ldapConnectionRes;
|
|
if (!$this->ldap->isResource($cr)) {
|
|
$cr = $this->getConnectionResource();
|
|
}
|
|
|
|
if (
|
|
count($this->bindResult) !== 0
|
|
&& $this->bindResult['sum'] === md5($this->configuration->ldapAgentName . $this->configPrefix . $this->configuration->ldapAgentPassword)
|
|
) {
|
|
// don't attempt to bind again with the same data as before
|
|
// bind might have been invoked via getConnectionResource(),
|
|
// but we need results specifically for e.g. user login
|
|
return $this->bindResult['result'];
|
|
}
|
|
|
|
$ldapLogin = @$this->ldap->bind($cr,
|
|
$this->configuration->ldapAgentName,
|
|
$this->configuration->ldapAgentPassword);
|
|
|
|
$this->bindResult = [
|
|
'sum' => md5($this->configuration->ldapAgentName . $this->configPrefix . $this->configuration->ldapAgentPassword),
|
|
'result' => $ldapLogin,
|
|
];
|
|
|
|
if (!$ldapLogin) {
|
|
$errno = $this->ldap->errno($cr);
|
|
|
|
$this->logger->warning(
|
|
'Bind failed: ' . $errno . ': ' . $this->ldap->error($cr),
|
|
['app' => 'user_ldap']
|
|
);
|
|
|
|
// Set to failure mode, if LDAP error code is not one of
|
|
// - LDAP_SUCCESS (0)
|
|
// - LDAP_INVALID_CREDENTIALS (49)
|
|
// - LDAP_INSUFFICIENT_ACCESS (50, spotted Apple Open Directory)
|
|
// - LDAP_UNWILLING_TO_PERFORM (53, spotted eDirectory)
|
|
if (!in_array($errno, [0, 49, 50, 53], true)) {
|
|
$this->ldapConnectionRes = null;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|