forked from GNUsocial/gnu-social
517 lines
17 KiB
PHP
517 lines
17 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4: */
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/**
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* File containing the Net_LDAP2_Schema interface class.
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*
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* PHP version 5
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*
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* @category Net
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* @package Net_LDAP2
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* @author Jan Wagner <wagner@netsols.de>
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* @author Benedikt Hallinger <beni@php.net>
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* @copyright 2009 Jan Wagner, Benedikt Hallinger
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* @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPLv3
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* @version SVN: $Id: Schema.php 286718 2009-08-03 07:30:49Z beni $
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* @link http://pear.php.net/package/Net_LDAP2/
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* @todo see the comment at the end of the file
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*/
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/**
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* Includes
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*/
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require_once 'PEAR.php';
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/**
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* Syntax definitions
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*
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* Please don't forget to add binary attributes to isBinary() below
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* to support proper value fetching from Net_LDAP2_Entry
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*/
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define('NET_LDAP2_SYNTAX_BOOLEAN', '1.3.6.1.4.1.1466.115.121.1.7');
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define('NET_LDAP2_SYNTAX_DIRECTORY_STRING', '1.3.6.1.4.1.1466.115.121.1.15');
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define('NET_LDAP2_SYNTAX_DISTINGUISHED_NAME', '1.3.6.1.4.1.1466.115.121.1.12');
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define('NET_LDAP2_SYNTAX_INTEGER', '1.3.6.1.4.1.1466.115.121.1.27');
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define('NET_LDAP2_SYNTAX_JPEG', '1.3.6.1.4.1.1466.115.121.1.28');
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define('NET_LDAP2_SYNTAX_NUMERIC_STRING', '1.3.6.1.4.1.1466.115.121.1.36');
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define('NET_LDAP2_SYNTAX_OID', '1.3.6.1.4.1.1466.115.121.1.38');
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define('NET_LDAP2_SYNTAX_OCTET_STRING', '1.3.6.1.4.1.1466.115.121.1.40');
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/**
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* Load an LDAP Schema and provide information
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*
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* This class takes a Subschema entry, parses this information
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* and makes it available in an array. Most of the code has been
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* inspired by perl-ldap( http://perl-ldap.sourceforge.net).
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* You will find portions of their implementation in here.
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*
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* @category Net
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* @package Net_LDAP2
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* @author Jan Wagner <wagner@netsols.de>
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* @author Benedikt Hallinger <beni@php.net>
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* @license http://www.gnu.org/copyleft/lesser.html LGPL
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* @link http://pear.php.net/package/Net_LDAP22/
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*/
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class Net_LDAP2_Schema extends PEAR
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{
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/**
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* Map of entry types to ldap attributes of subschema entry
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*
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* @access public
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* @var array
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*/
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public $types = array(
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'attribute' => 'attributeTypes',
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'ditcontentrule' => 'dITContentRules',
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'ditstructurerule' => 'dITStructureRules',
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'matchingrule' => 'matchingRules',
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'matchingruleuse' => 'matchingRuleUse',
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'nameform' => 'nameForms',
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'objectclass' => 'objectClasses',
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'syntax' => 'ldapSyntaxes'
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);
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/**
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* Array of entries belonging to this type
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*
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* @access protected
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* @var array
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*/
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protected $_attributeTypes = array();
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protected $_matchingRules = array();
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protected $_matchingRuleUse = array();
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protected $_ldapSyntaxes = array();
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protected $_objectClasses = array();
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protected $_dITContentRules = array();
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protected $_dITStructureRules = array();
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protected $_nameForms = array();
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/**
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* hash of all fetched oids
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*
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* @access protected
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* @var array
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*/
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protected $_oids = array();
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/**
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* Tells if the schema is initialized
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*
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* @access protected
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* @var boolean
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* @see parse(), get()
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*/
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protected $_initialized = false;
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/**
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* Constructor of the class
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*
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* @access protected
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*/
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protected function __construct()
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{
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$this->PEAR('Net_LDAP2_Error'); // default error class
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}
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/**
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* Fetch the Schema from an LDAP connection
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*
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* @param Net_LDAP2 $ldap LDAP connection
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* @param string $dn (optional) Subschema entry dn
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*
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* @access public
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* @return Net_LDAP2_Schema|NET_LDAP2_Error
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*/
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public function fetch($ldap, $dn = null)
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{
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if (!$ldap instanceof Net_LDAP2) {
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return PEAR::raiseError("Unable to fetch Schema: Parameter \$ldap must be a Net_LDAP2 object!");
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}
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$schema_o = new Net_LDAP2_Schema();
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if (is_null($dn)) {
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// get the subschema entry via root dse
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$dse = $ldap->rootDSE(array('subschemaSubentry'));
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if (false == Net_LDAP2::isError($dse)) {
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$base = $dse->getValue('subschemaSubentry', 'single');
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if (!Net_LDAP2::isError($base)) {
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$dn = $base;
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}
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}
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}
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// Support for buggy LDAP servers (e.g. Siemens DirX 6.x) that incorrectly
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// call this entry subSchemaSubentry instead of subschemaSubentry.
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// Note the correct case/spelling as per RFC 2251.
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if (is_null($dn)) {
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// get the subschema entry via root dse
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$dse = $ldap->rootDSE(array('subSchemaSubentry'));
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if (false == Net_LDAP2::isError($dse)) {
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$base = $dse->getValue('subSchemaSubentry', 'single');
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if (!Net_LDAP2::isError($base)) {
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$dn = $base;
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}
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}
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}
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// Final fallback case where there is no subschemaSubentry attribute
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// in the root DSE (this is a bug for an LDAP v3 server so report this
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// to your LDAP vendor if you get this far).
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if (is_null($dn)) {
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$dn = 'cn=Subschema';
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}
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// fetch the subschema entry
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$result = $ldap->search($dn, '(objectClass=*)',
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array('attributes' => array_values($schema_o->types),
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'scope' => 'base'));
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if (Net_LDAP2::isError($result)) {
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return $result;
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}
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$entry = $result->shiftEntry();
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if (!$entry instanceof Net_LDAP2_Entry) {
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return PEAR::raiseError('Could not fetch Subschema entry');
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}
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$schema_o->parse($entry);
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return $schema_o;
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}
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/**
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* Return a hash of entries for the given type
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*
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* Returns a hash of entry for th givene type. Types may be:
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* objectclasses, attributes, ditcontentrules, ditstructurerules, matchingrules,
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* matchingruleuses, nameforms, syntaxes
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*
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* @param string $type Type to fetch
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*
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* @access public
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* @return array|Net_LDAP2_Error Array or Net_LDAP2_Error
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*/
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public function &getAll($type)
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{
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$map = array('objectclasses' => &$this->_objectClasses,
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'attributes' => &$this->_attributeTypes,
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'ditcontentrules' => &$this->_dITContentRules,
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'ditstructurerules' => &$this->_dITStructureRules,
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'matchingrules' => &$this->_matchingRules,
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'matchingruleuses' => &$this->_matchingRuleUse,
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'nameforms' => &$this->_nameForms,
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'syntaxes' => &$this->_ldapSyntaxes );
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$key = strtolower($type);
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$ret = ((key_exists($key, $map)) ? $map[$key] : PEAR::raiseError("Unknown type $type"));
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return $ret;
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}
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/**
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* Return a specific entry
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*
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* @param string $type Type of name
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* @param string $name Name or OID to fetch
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*
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* @access public
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* @return mixed Entry or Net_LDAP2_Error
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*/
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public function &get($type, $name)
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{
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if ($this->_initialized) {
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$type = strtolower($type);
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if (false == key_exists($type, $this->types)) {
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return PEAR::raiseError("No such type $type");
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}
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$name = strtolower($name);
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$type_var = &$this->{'_' . $this->types[$type]};
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if (key_exists($name, $type_var)) {
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return $type_var[$name];
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} elseif (key_exists($name, $this->_oids) && $this->_oids[$name]['type'] == $type) {
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return $this->_oids[$name];
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} else {
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return PEAR::raiseError("Could not find $type $name");
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}
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} else {
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$return = null;
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return $return;
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}
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}
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/**
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* Fetches attributes that MAY be present in the given objectclass
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*
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* @param string $oc Name or OID of objectclass
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*
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* @access public
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* @return array|Net_LDAP2_Error Array with attributes or Net_LDAP2_Error
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*/
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public function may($oc)
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{
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return $this->_getAttr($oc, 'may');
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}
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/**
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* Fetches attributes that MUST be present in the given objectclass
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*
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* @param string $oc Name or OID of objectclass
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*
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* @access public
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* @return array|Net_LDAP2_Error Array with attributes or Net_LDAP2_Error
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*/
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public function must($oc)
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{
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return $this->_getAttr($oc, 'must');
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}
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/**
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* Fetches the given attribute from the given objectclass
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*
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* @param string $oc Name or OID of objectclass
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* @param string $attr Name of attribute to fetch
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*
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* @access protected
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* @return array|Net_LDAP2_Error The attribute or Net_LDAP2_Error
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*/
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protected function _getAttr($oc, $attr)
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{
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$oc = strtolower($oc);
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if (key_exists($oc, $this->_objectClasses) && key_exists($attr, $this->_objectClasses[$oc])) {
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return $this->_objectClasses[$oc][$attr];
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} elseif (key_exists($oc, $this->_oids) &&
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$this->_oids[$oc]['type'] == 'objectclass' &&
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key_exists($attr, $this->_oids[$oc])) {
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return $this->_oids[$oc][$attr];
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} else {
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return PEAR::raiseError("Could not find $attr attributes for $oc ");
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}
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}
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/**
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* Returns the name(s) of the immediate superclass(es)
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*
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* @param string $oc Name or OID of objectclass
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*
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* @access public
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* @return array|Net_LDAP2_Error Array of names or Net_LDAP2_Error
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*/
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public function superclass($oc)
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{
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$o = $this->get('objectclass', $oc);
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if (Net_LDAP2::isError($o)) {
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return $o;
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}
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return (key_exists('sup', $o) ? $o['sup'] : array());
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}
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/**
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* Parses the schema of the given Subschema entry
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*
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* @param Net_LDAP2_Entry &$entry Subschema entry
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*
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* @access public
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* @return void
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*/
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public function parse(&$entry)
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{
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foreach ($this->types as $type => $attr) {
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// initialize map type to entry
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$type_var = '_' . $attr;
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$this->{$type_var} = array();
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// get values for this type
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if ($entry->exists($attr)) {
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$values = $entry->getValue($attr);
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if (is_array($values)) {
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foreach ($values as $value) {
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unset($schema_entry); // this was a real mess without it
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// get the schema entry
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$schema_entry = $this->_parse_entry($value);
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// set the type
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$schema_entry['type'] = $type;
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// save a ref in $_oids
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$this->_oids[$schema_entry['oid']] = &$schema_entry;
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// save refs for all names in type map
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$names = $schema_entry['aliases'];
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array_push($names, $schema_entry['name']);
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foreach ($names as $name) {
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$this->{$type_var}[strtolower($name)] = &$schema_entry;
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}
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}
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}
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}
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}
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$this->_initialized = true;
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}
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/**
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* Parses an attribute value into a schema entry
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*
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* @param string $value Attribute value
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*
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* @access protected
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* @return array|false Schema entry array or false
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*/
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protected function &_parse_entry($value)
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{
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// tokens that have no value associated
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$noValue = array('single-value',
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'obsolete',
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'collective',
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'no-user-modification',
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'abstract',
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'structural',
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'auxiliary');
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// tokens that can have multiple values
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$multiValue = array('must', 'may', 'sup');
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$schema_entry = array('aliases' => array()); // initilization
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$tokens = $this->_tokenize($value); // get an array of tokens
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// remove surrounding brackets
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if ($tokens[0] == '(') array_shift($tokens);
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if ($tokens[count($tokens) - 1] == ')') array_pop($tokens); // -1 doesnt work on arrays :-(
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$schema_entry['oid'] = array_shift($tokens); // first token is the oid
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// cycle over the tokens until none are left
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while (count($tokens) > 0) {
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$token = strtolower(array_shift($tokens));
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if (in_array($token, $noValue)) {
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$schema_entry[$token] = 1; // single value token
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} else {
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// this one follows a string or a list if it is multivalued
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if (($schema_entry[$token] = array_shift($tokens)) == '(') {
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// this creates the list of values and cycles through the tokens
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// until the end of the list is reached ')'
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$schema_entry[$token] = array();
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while ($tmp = array_shift($tokens)) {
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if ($tmp == ')') break;
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if ($tmp != '$') array_push($schema_entry[$token], $tmp);
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}
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}
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// create a array if the value should be multivalued but was not
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if (in_array($token, $multiValue) && !is_array($schema_entry[$token])) {
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$schema_entry[$token] = array($schema_entry[$token]);
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}
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}
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}
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// get max length from syntax
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if (key_exists('syntax', $schema_entry)) {
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if (preg_match('/{(\d+)}/', $schema_entry['syntax'], $matches)) {
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$schema_entry['max_length'] = $matches[1];
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}
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}
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// force a name
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if (empty($schema_entry['name'])) {
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$schema_entry['name'] = $schema_entry['oid'];
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}
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// make one name the default and put the other ones into aliases
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if (is_array($schema_entry['name'])) {
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$aliases = $schema_entry['name'];
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$schema_entry['name'] = array_shift($aliases);
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$schema_entry['aliases'] = $aliases;
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}
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return $schema_entry;
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}
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/**
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* Tokenizes the given value into an array of tokens
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*
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* @param string $value String to parse
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*
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* @access protected
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* @return array Array of tokens
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*/
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protected function _tokenize($value)
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{
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$tokens = array(); // array of tokens
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$matches = array(); // matches[0] full pattern match, [1,2,3] subpatterns
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// this one is taken from perl-ldap, modified for php
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$pattern = "/\s* (?:([()]) | ([^'\s()]+) | '((?:[^']+|'[^\s)])*)') \s*/x";
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/**
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* This one matches one big pattern wherin only one of the three subpatterns matched
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* We are interested in the subpatterns that matched. If it matched its value will be
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* non-empty and so it is a token. Tokens may be round brackets, a string, or a string
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* enclosed by '
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*/
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preg_match_all($pattern, $value, $matches);
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for ($i = 0; $i < count($matches[0]); $i++) { // number of tokens (full pattern match)
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for ($j = 1; $j < 4; $j++) { // each subpattern
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if (null != trim($matches[$j][$i])) { // pattern match in this subpattern
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$tokens[$i] = trim($matches[$j][$i]); // this is the token
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}
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}
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}
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return $tokens;
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}
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/**
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* Returns wether a attribute syntax is binary or not
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*
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* This method gets used by Net_LDAP2_Entry to decide which
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* PHP function needs to be used to fetch the value in the
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* proper format (e.g. binary or string)
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*
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* @param string $attribute The name of the attribute (eg.: 'sn')
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*
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* @access public
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* @return boolean
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*/
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public function isBinary($attribute)
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{
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$return = false; // default to false
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// This list contains all syntax that should be treaten as
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// containing binary values
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// The Syntax Definitons go into constants at the top of this page
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$syntax_binary = array(
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NET_LDAP2_SYNTAX_OCTET_STRING,
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NET_LDAP2_SYNTAX_JPEG
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);
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// Check Syntax
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$attr_s = $this->get('attribute', $attribute);
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if (Net_LDAP2::isError($attr_s)) {
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// Attribute not found in schema
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$return = false; // consider attr not binary
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} elseif (isset($attr_s['syntax']) && in_array($attr_s['syntax'], $syntax_binary)) {
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// Syntax is defined as binary in schema
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$return = true;
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} else {
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// Syntax not defined as binary, or not found
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// if attribute is a subtype, check superior attribute syntaxes
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if (isset($attr_s['sup'])) {
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foreach ($attr_s['sup'] as $superattr) {
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$return = $this->isBinary($superattr);
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if ($return) {
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break; // stop checking parents since we are binary
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}
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}
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}
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}
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return $return;
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}
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// [TODO] add method that allows us to see to which objectclasses a certain attribute belongs to
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// it should return the result structured, e.g. sorted in "may" and "must". Optionally it should
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// be able to return it just "flat", e.g. array_merge()d.
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// We could use get_all() to achieve this easily, i think
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}
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?>
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