582 lines
20 KiB
PHP
582 lines
20 KiB
PHP
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<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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/*
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* Class that adds LDAP Authentication to Tiki and aids Tiki to get User/Group Information
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* from a LDAP directory
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*/
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use Laminas\Ldap\Filter;
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use Laminas\Ldap\Ldap;
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use Laminas\Ldap\Exception\LdapException;
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use Laminas\Ldap\Collection\DefaultIterator as LdapCollectionIterator;
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use Tiki\Lib\Logs\LogsLib;
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class TikiLdapLib
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{
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public $groups;
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// var to hold a established connection
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/** @var Ldap */
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protected $ldaplink = null;
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// var for ldap configuration parameters
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protected $options = [
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'host' => 'localhost',
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'port' => null,
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'version' => 3,
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'starttls' => false,
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'useSsl' => false,
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'baseDn' => '',
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'filter' => '(objectClass=*)',
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'scope' => 'sub',
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'bind_type' => 'default',
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'username' => '',
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'password' => '',
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'userdn' => '',
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'useroc' => 'inetOrgPerson',
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'userattr' => 'cn',
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'fullnameattr' => '',
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'emailattr' => 'mail',
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'countryattr' => '',
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'groupdn' => '',
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'groupattr' => 'gid',
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'groupoc' => 'groupOfNames',
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'groupnameattr' => '',
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'groupdescattr' => '',
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'groupmemberattr' => '',
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'groupmemberisdn' => true,
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'usergroupattr' => '',
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'groupgroupattr' => '',
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'debug' => false
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];
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protected $logslib = null;
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/**
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* @var array The user attributes
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*/
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protected $user_attributes = null;
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// Constructor
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public function __construct($options)
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{
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// debug setting
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$logslib = TikiLib::lib('logs');
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if (isset($options['debug']) && ($options['debug'] === true || $options['debug'] == 'y' ) && ($logslib instanceof LogsLib)) {
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$this->options['debug'] = true;
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$this->logslib = $logslib;
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}
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// Configure the connection
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// host can be a list of hostnames.
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// It is easier to create URIs because if we use ssl, we have to create a URI
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if (isset($options['host']) && ! empty($options['host'])) {
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$h = $options['host'];
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} else { // use default
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$h = $this->options['host'];
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}
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$t = preg_split('#[\s,]#', $h);
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if (isset($options['useSsl']) && ($options['useSsl'] == 'y' || $options['useSsl'] === true)) {
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$prefix = 'ldaps://';
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$port = 636;
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} else {
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$prefix = 'ldap://';
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$port = 389;
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}
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if (isset($options['port']) && ! empty($options['port'])) {
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$port = (int)$options['port'];
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}
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$this->options['port'] = $port; // its save to set port in URI
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$this->options['host'] = [];
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foreach ($t as $h) {
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if (preg_match('#^ldaps?://#', $h)) { // entry is already URI
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$this->options['host'] = $h;
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} else {
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$this->options['host'] = $h;
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}
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}
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if (isset($options['useStartTls']) && ! empty($options['useStartTls'])) {
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$this->options['useStartTls'] = ($options['useStartTls'] === true || $options['useStartTls'] == 'y');
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}
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if (isset($options['groupmemberisdn']) && ! empty($options['groupmemberisdn'])) {
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$this->options['groupmemberisdn'] = ($options['groupmemberisdn'] === true || $options['groupmemberisdn'] == 'y');
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}
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// only string checking fo these ones
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foreach (
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['baseDn', 'username', 'password', 'userdn', 'useroc', 'userattr',
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'fullnameattr', 'emailattr', 'groupdn', 'groupattr', 'groupoc', 'groupnameattr',
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'groupdescattr', 'groupmemberattr', 'usergroupattr', 'groupgroupattr', 'binddn', 'bindpw'] as $n
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) {
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if (isset($options[$n]) && ! empty($options[$n])) {
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$this->options[$n] = $options[$n];
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}
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}
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if (empty($this->options['groupgroupattr'])) {
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$this->options['groupgroupattr'] = $this->options['usergroupattr'];
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}
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if (isset($options['password'])) {
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$this->options['bindpw'] = $options['password'];
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}
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if (isset($options['scope']) && ! empty($options['scope'])) {
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switch ($options['scope']) {
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case 'sub':
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case 'one':
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case 'base':
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$this->options['scope'] = $options['scope'];
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break;
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default:
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break;
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}
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}
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if (isset($options['bind_type']) && ! empty($options['bind_type'])) {
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switch ($options['bind_type']) {
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case 'ad':
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case 'ol':
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case 'full':
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case 'plain':
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case 'explicit':
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$this->options['bind_type'] = $options['bind_type'];
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break;
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default:
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break;
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}
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}
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}
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public function __destruct()
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{
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unset($this->ldaplink);
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}
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// Do a ldap bind
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public function bind($reconnect = false)
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{
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global $prefs;
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// Force the reconnection
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if ($this->ldaplink instanceof Ldap && $this->ldaplink->getBoundUser() !== false) {
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if ($reconnect === true) {
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$this->ldaplink->disconnect();
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} else {
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return LdapException::LDAP_SUCCESS; // do not try to reconnect since this may lead to huge timeouts
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}
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}
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// Set the bindpw with the options['password']
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if ($this->options['bind_type'] != 'explicit') {
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$this->options['bindpw'] = $this->options['password'];
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}
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$user = $this->options['username'];
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switch ($this->options['bind_type']) {
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case 'ad': // active directory
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preg_match_all('/\s*,?dc=\s*([^,]+)/i', $this->options['baseDn'], $t);
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$this->options['binddn'] = $user . '@';
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if (isset($t[1]) && is_array($t[1])) {
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foreach ($t[1] as $domainpart) {
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$this->options['binddn'] .= $domainpart . '.';
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}
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// cut trailing dot
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$this->options['binddn'] = substr($this->options['binddn'], 0, -1);
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}
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// set referrals to 0 to avoid LDAP_OPERATIONS_ERROR
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$this->options['options']['LDAP_OPT_REFERRALS'] = 0;
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// use user@domain for binding
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$this->options['tryUsernameSplit'] = false;
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break;
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case 'plain': // plain username
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$this->options['binddn'] = $user;
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break;
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case 'full':
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$this->options['binddn'] = $this->user_dn($user);
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break;
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case 'ol': // openldap
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$this->options['binddn'] = 'cn=' . $user . ',' . $prefs['auth_ldap_basedn'];
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break;
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case 'default':
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// Anonymous binding
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$this->options['binddn'] = '';
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$this->options['bindpw'] = '';
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break;
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case 'explicit':
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break;
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default:
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$this->add_log('ldap', 'Error: Invalid "bind_type" value "' . $this->options['bind_type'] . '".');
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die;
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}
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$this->add_log(
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'ldap',
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'Connect Host: ' . $this->options['host'] . '. Binddn: ' . $this->options['binddn'] . ' at line ' . __LINE__ . ' in ' . __FILE__
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);
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$permittedOptions = [
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'host',
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'port',
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'useSsl',
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'username',
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'password',
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'bindRequiresDn',
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'baseDn',
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'accountCanonicalForm',
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'accountDomainName',
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'accountDomainNameShort',
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'accountFilterFormat',
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'allowEmptyPassword',
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'useStartTls',
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'optReferrals',
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'tryUsernameSplit',
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'networkTimeout',
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];
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$options = [];
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//create options array to handle it to \Laminas\Ldap\Ldap
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foreach ($permittedOptions as $o) {
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if (isset($this->options[$o])) {
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$options[$o] = $this->options[$o];
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}
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}
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try {
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$this->ldaplink = new Ldap($options);
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$this->ldaplink->bind($this->options['binddn'], $this->options['bindpw']);
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} catch (LdapException $e) {
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if ($prefs['auth_ldap_debug'] == 'y') {
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$this->add_log('ldap', 'Error: ' . $e->getMessage() . ' at line ' . __LINE__ . ' in ' . __FILE__);
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}
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return $e->getCode();
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}
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return LdapException::LDAP_SUCCESS;
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}
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// return information about user attributes
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public function get_user_attributes($force_reload = false)
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{
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if ($force_reload) {
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unset($this->user_attributes);
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}
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if (! empty($this->user_attributes)) {
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return $this->user_attributes;
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}
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$userdn = $this->user_dn();
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// ensure we have a connection to the ldap server
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if ($this->bind() !== LdapException::LDAP_SUCCESS) {
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//@todo fix this error since getMessage no longer works
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$this->add_log('ldap', 'Reuse of ldap connection failed: ' . $this->ldaplink->getLastError() . ' at line ' . __LINE__ . ' in ' . __FILE__);
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return false;
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}
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// todo: only fetch needed attributes
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//A non-existing user may not return ldaplink->getEntry (found bug on windows server), if not found, user input incorrect username/password
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try {
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$searchresult = $this->ldaplink->search("(objectClass=*)", $userdn, Ldap::SEARCH_SCOPE_BASE, [], null);
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$searchresult->getInnerIterator()->setAttributeNameTreatment(LdapCollectionIterator::ATTRIBUTE_NATIVE);
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$entry = $searchresult->getFirst();
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} catch (LdapException $e) {
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$entry = null;
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}
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if ($force_reload || is_null($entry)) { // wrong userdn. So we have to search
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// prepare Search Filter
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$filter = Filter::equals($this->options['userattr'], $this->options['username']);
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$this->add_log('ldap', 'Searching for user information with filter: ' . $filter->toString() . ' at line ' . __LINE__ . ' in ' . __FILE__);
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try {
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$searchresult = $this->ldaplink->search($filter, $this->userbase_dn(), $this->options['scope']);
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$searchresult->getInnerIterator()->setAttributeNameTreatment(LdapCollectionIterator::ATTRIBUTE_NATIVE);
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} catch (LdapException $e) {
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$this->add_log('ldap', 'Search failed: ' . $e->getMessage() . ' at line ' . __LINE__ . ' in ' . __FILE__);
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return false;
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}
|
||
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if ($searchresult->count() != 1) {
|
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$this->add_log('ldap', 'Error: Search returned ' . $searchresult->count() . ' entries' . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
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return false;
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||
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}
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||
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// get first entry
|
||
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$entry = $searchresult->getFirst();
|
||
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}
|
||
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||
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$this->user_attributes = $this->parseLdapAttributes($entry);
|
||
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if (empty($this->user_attributes)) {
|
||
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$this->add_log('ldap', 'Error fetching user attributes at line ' . __LINE__ . ' in ' . __FILE__);
|
||
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return false;
|
||
|
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}
|
||
|
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|
||
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return $this->user_attributes;
|
||
|
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}
|
||
|
|
|
||
|
|
// Request all users attributes
|
||
|
|
public function get_all_users_attributes()
|
||
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|
{
|
||
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|
// ensure we have a connection to the ldap server
|
||
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if ($this->bind() !== LdapException::LDAP_SUCCESS) {
|
||
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$this->add_log('ldap', 'Reuse of ldap connection failed: ' . $this->ldaplink->getLastError() . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
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return false;
|
||
|
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}
|
||
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|
||
|
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// Prepare Search Filter
|
||
|
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$filter = Filter::equals('objectclass', $this->options['useroc']);
|
||
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|
||
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$this->add_log('ldap', 'Searching for user information with filter: ' . $filter->toString() . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
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|
||
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try {
|
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$searchresult = $this->ldaplink->search($filter, $this->userbase_dn(), $this->options['scope']);
|
||
|
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$searchresult->getInnerIterator()->setAttributeNameTreatment(LdapCollectionIterator::ATTRIBUTE_NATIVE);
|
||
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} catch (LdapException $e) {
|
||
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$this->add_log('ldap', 'Search failed: ' . $e->getMessage() . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
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return false;
|
||
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}
|
||
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|
||
|
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if ($searchresult->count() < 1) {
|
||
|
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$this->add_log('ldap', 'Error: Search returned ' . $searchresult->count() . ' entries' . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
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|
||
|
|
$entries = $searchresult->toArray();
|
||
|
|
$users_attributes = [];
|
||
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|
||
|
|
foreach ($entries as $entry) {
|
||
|
|
$users_attributes[] = $this->parseLdapAttributes($entry);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ($users_attributes);
|
||
|
|
}
|
||
|
|
|
||
|
|
// return dn of all groups a user belongs to
|
||
|
|
public function get_groups($force_reload = false)
|
||
|
|
{
|
||
|
|
$this->get_user_attributes($force_reload);
|
||
|
|
|
||
|
|
// ensure we have a connection to the ldap server
|
||
|
|
if ($this->bind() !== LdapException::LDAP_SUCCESS) {
|
||
|
|
$this->add_log('ldap', 'Reuse of ldap connection failed: ' . $this->ldaplink->getLastError() . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
$filter1 = Filter::equals('objectClass', $this->options['groupoc']);
|
||
|
|
|
||
|
|
if (! empty($this->options['groupmemberattr'])) {
|
||
|
|
// get membership from group information
|
||
|
|
if ($this->options['groupmemberisdn']) {
|
||
|
|
if ($this->user_attributes['dn'] == null) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
$filter2 = Filter::equals($this->options['groupmemberattr'], $this->user_dn()) ;
|
||
|
|
} else {
|
||
|
|
$filter2 = Filter::equals($this->options['groupmemberattr'], $this->options['username']);
|
||
|
|
}
|
||
|
|
$filter = Filter::andFilter($filter1, $filter2);
|
||
|
|
} elseif (! empty($this->options['usergroupattr'])) {
|
||
|
|
// get membership from user information
|
||
|
|
|
||
|
|
if ($this->options['usergroupattr'] === 'distinguishedName') {
|
||
|
|
// get membership from user DN
|
||
|
|
|
||
|
|
// split DN into RDN strings
|
||
|
|
$dn_string = $this->user_attributes[$this->options['usergroupattr']];
|
||
|
|
$rdn_strings = explode(',', $dn_string);
|
||
|
|
|
||
|
|
// add value of RDNs with OU type
|
||
|
|
$ugi = [];
|
||
|
|
foreach ($rdn_strings as $rdn_string) {
|
||
|
|
// split RDN string in type and value
|
||
|
|
$rdn_parts = explode('=', $rdn_string, 2);
|
||
|
|
$rdn_type = $rdn_parts[0];
|
||
|
|
$rdn_value = $rdn_parts[1];
|
||
|
|
|
||
|
|
// add RDN value if type is OU
|
||
|
|
if (strtoupper($rdn_type) === 'OU') {
|
||
|
|
$ugi[] = $rdn_value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$ugi = &$this->user_attributes[$this->options['usergroupattr']];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (! empty($ugi)) {
|
||
|
|
if (! is_array($ugi)) {
|
||
|
|
$ugi = [$ugi];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($ugi) == 1) { // one gid
|
||
|
|
$filter3 = Filter::equals($this->options['groupgroupattr'], $ugi[0]);
|
||
|
|
} else { // mor gids
|
||
|
|
$filtertmp = [];
|
||
|
|
foreach ($ugi as $g) {
|
||
|
|
$filtertmp[] = Filter::equals($this->options['groupgroupattr'], $g);
|
||
|
|
}
|
||
|
|
|
||
|
|
$filter3 = new Filter\OrFilter($filtertmp);
|
||
|
|
}
|
||
|
|
|
||
|
|
$filter = Filter::andFilter($filter1, $filter3);
|
||
|
|
} else { // User has no group
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// not possible to get groups - return empty array
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->add_log(
|
||
|
|
'ldap',
|
||
|
|
'Searching for group entries with filter: ' . $filter->toString() . ' base ' .
|
||
|
|
$this->groupbase_dn() . ' at line ' . __LINE__ . ' in ' . __FILE__
|
||
|
|
);
|
||
|
|
|
||
|
|
try {
|
||
|
|
$searchresult = $this->ldaplink->search($filter, $this->groupbase_dn(), $this->options['scope']);
|
||
|
|
$searchresult->getInnerIterator()->setAttributeNameTreatment(LdapCollectionIterator::ATTRIBUTE_NATIVE);
|
||
|
|
} catch (LdapException $e) {
|
||
|
|
$this->add_log('ldap', 'Search failed: ' . $e->getMessage() . ' at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->add_log('ldap', 'Found ' . $searchresult->count() . ' entries. Extracting entries now.');
|
||
|
|
|
||
|
|
$groupEntries = $searchresult->toArray();
|
||
|
|
$this->groups = [];
|
||
|
|
|
||
|
|
foreach ($groupEntries as $entry) {
|
||
|
|
if (empty($entry)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$group = $this->parseLdapAttributes($entry);
|
||
|
|
$this->groups[$group['dn']] = $group; // no error checking necessary here
|
||
|
|
}
|
||
|
|
$this->add_log('ldap', count($this->groups) . ' groups found at line ' . __LINE__ . ' in ' . __FILE__);
|
||
|
|
|
||
|
|
return($this->groups);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// helper functions
|
||
|
|
private function userbase_dn()
|
||
|
|
{
|
||
|
|
if (empty($this->options['userdn'])) {
|
||
|
|
return($this->options['baseDn']);
|
||
|
|
}
|
||
|
|
return($this->options['userdn'] . ',' . $this->options['baseDn']);
|
||
|
|
}
|
||
|
|
|
||
|
|
private function user_dn()
|
||
|
|
{
|
||
|
|
if (isset($this->user_attributes['dn'])) {
|
||
|
|
// we did already fetch user attributes and have the real dn now
|
||
|
|
return($this->user_attributes['dn']);
|
||
|
|
}
|
||
|
|
if (empty($this->options['userattr'])) {
|
||
|
|
$ua = 'cn=';
|
||
|
|
} else {
|
||
|
|
$ua = $this->options['userattr'] . '=';
|
||
|
|
}
|
||
|
|
return($ua . $this->options['username'] . ',' . $this->userbase_dn());
|
||
|
|
}
|
||
|
|
|
||
|
|
private function groupbase_dn()
|
||
|
|
{
|
||
|
|
if (empty($this->options['groupdn'])) {
|
||
|
|
return($this->options['baseDn']);
|
||
|
|
}
|
||
|
|
return($this->options['groupdn'] . ',' . $this->options['baseDn']);
|
||
|
|
}
|
||
|
|
|
||
|
|
private function add_log($facility, $message)
|
||
|
|
{
|
||
|
|
if ($this->options['debug']) {
|
||
|
|
$this->logslib->add_log($facility, $message);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Setter to set an option value
|
||
|
|
* @param string $name The name of the option
|
||
|
|
* @param mixed $value The value
|
||
|
|
* @return void
|
||
|
|
* @throw Exception
|
||
|
|
*/
|
||
|
|
public function setOption($name, $value = null)
|
||
|
|
{
|
||
|
|
if (isset($this->options[$name])) {
|
||
|
|
$this->options[$name] = $value;
|
||
|
|
} else {
|
||
|
|
throw new Exception(sprintf("Undefined option: %s \n", $name), E_USER_WARNING);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return the value of the attribute past in param
|
||
|
|
* @param string $name The name of the attribute
|
||
|
|
* @return mixed
|
||
|
|
* @throw Exception
|
||
|
|
*/
|
||
|
|
public function getUserAttribute($name)
|
||
|
|
{
|
||
|
|
$value = '';
|
||
|
|
try {
|
||
|
|
$values = self::get_user_attributes();
|
||
|
|
if (isset($values[$name])) {
|
||
|
|
$value = $values[$name];
|
||
|
|
} else {
|
||
|
|
throw new Exception(sprintf("Undefined attribute %s \n", $name), E_USER_WARNING);
|
||
|
|
}
|
||
|
|
} catch (Exception $e) {
|
||
|
|
}
|
||
|
|
return $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parse the ldap retrieved attributes for a given entry
|
||
|
|
*
|
||
|
|
* @param $entry
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
private function parseLdapAttributes($entry)
|
||
|
|
{
|
||
|
|
$attributes = [];
|
||
|
|
foreach ($entry as $key => $value) {
|
||
|
|
if (is_array($value)) {
|
||
|
|
$attributes[$key] = count($value) == 1 ? array_shift($value) : $value;
|
||
|
|
} else {
|
||
|
|
$attributes[$key] = $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $attributes;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|