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Diffstat (limited to 'extlib/Net/LDAP2/Schema.php')
| -rw-r--r-- | extlib/Net/LDAP2/Schema.php | 516 |
1 files changed, 516 insertions, 0 deletions
diff --git a/extlib/Net/LDAP2/Schema.php b/extlib/Net/LDAP2/Schema.php new file mode 100644 index 000000000..b590eabc5 --- /dev/null +++ b/extlib/Net/LDAP2/Schema.php @@ -0,0 +1,516 @@ +<?php +/* vim: set expandtab tabstop=4 shiftwidth=4: */ +/** +* File containing the Net_LDAP2_Schema interface class. +* +* PHP version 5 +* +* @category Net +* @package Net_LDAP2 +* @author Jan Wagner <wagner@netsols.de> +* @author Benedikt Hallinger <beni@php.net> +* @copyright 2009 Jan Wagner, Benedikt Hallinger +* @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPLv3 +* @version SVN: $Id: Schema.php 286718 2009-08-03 07:30:49Z beni $ +* @link http://pear.php.net/package/Net_LDAP2/ +* @todo see the comment at the end of the file +*/ + +/** +* Includes +*/ +require_once 'PEAR.php'; + +/** +* Syntax definitions +* +* Please don't forget to add binary attributes to isBinary() below +* to support proper value fetching from Net_LDAP2_Entry +*/ +define('NET_LDAP2_SYNTAX_BOOLEAN', '1.3.6.1.4.1.1466.115.121.1.7'); +define('NET_LDAP2_SYNTAX_DIRECTORY_STRING', '1.3.6.1.4.1.1466.115.121.1.15'); +define('NET_LDAP2_SYNTAX_DISTINGUISHED_NAME', '1.3.6.1.4.1.1466.115.121.1.12'); +define('NET_LDAP2_SYNTAX_INTEGER', '1.3.6.1.4.1.1466.115.121.1.27'); +define('NET_LDAP2_SYNTAX_JPEG', '1.3.6.1.4.1.1466.115.121.1.28'); +define('NET_LDAP2_SYNTAX_NUMERIC_STRING', '1.3.6.1.4.1.1466.115.121.1.36'); +define('NET_LDAP2_SYNTAX_OID', '1.3.6.1.4.1.1466.115.121.1.38'); +define('NET_LDAP2_SYNTAX_OCTET_STRING', '1.3.6.1.4.1.1466.115.121.1.40'); + +/** +* Load an LDAP Schema and provide information +* +* This class takes a Subschema entry, parses this information +* and makes it available in an array. Most of the code has been +* inspired by perl-ldap( http://perl-ldap.sourceforge.net). +* You will find portions of their implementation in here. +* +* @category Net +* @package Net_LDAP2 +* @author Jan Wagner <wagner@netsols.de> +* @author Benedikt Hallinger <beni@php.net> +* @license http://www.gnu.org/copyleft/lesser.html LGPL +* @link http://pear.php.net/package/Net_LDAP22/ +*/ +class Net_LDAP2_Schema extends PEAR +{ + /** + * Map of entry types to ldap attributes of subschema entry + * + * @access public + * @var array + */ + public $types = array( + 'attribute' => 'attributeTypes', + 'ditcontentrule' => 'dITContentRules', + 'ditstructurerule' => 'dITStructureRules', + 'matchingrule' => 'matchingRules', + 'matchingruleuse' => 'matchingRuleUse', + 'nameform' => 'nameForms', + 'objectclass' => 'objectClasses', + 'syntax' => 'ldapSyntaxes' + ); + + /** + * Array of entries belonging to this type + * + * @access protected + * @var array + */ + protected $_attributeTypes = array(); + protected $_matchingRules = array(); + protected $_matchingRuleUse = array(); + protected $_ldapSyntaxes = array(); + protected $_objectClasses = array(); + protected $_dITContentRules = array(); + protected $_dITStructureRules = array(); + protected $_nameForms = array(); + + + /** + * hash of all fetched oids + * + * @access protected + * @var array + */ + protected $_oids = array(); + + /** + * Tells if the schema is initialized + * + * @access protected + * @var boolean + * @see parse(), get() + */ + protected $_initialized = false; + + + /** + * Constructor of the class + * + * @access protected + */ + protected function __construct() + { + $this->PEAR('Net_LDAP2_Error'); // default error class + } + + /** + * Fetch the Schema from an LDAP connection + * + * @param Net_LDAP2 $ldap LDAP connection + * @param string $dn (optional) Subschema entry dn + * + * @access public + * @return Net_LDAP2_Schema|NET_LDAP2_Error + */ + public function fetch($ldap, $dn = null) + { + if (!$ldap instanceof Net_LDAP2) { + return PEAR::raiseError("Unable to fetch Schema: Parameter \$ldap must be a Net_LDAP2 object!"); + } + + $schema_o = new Net_LDAP2_Schema(); + + if (is_null($dn)) { + // get the subschema entry via root dse + $dse = $ldap->rootDSE(array('subschemaSubentry')); + if (false == Net_LDAP2::isError($dse)) { + $base = $dse->getValue('subschemaSubentry', 'single'); + if (!Net_LDAP2::isError($base)) { + $dn = $base; + } + } + } + + // Support for buggy LDAP servers (e.g. Siemens DirX 6.x) that incorrectly + // call this entry subSchemaSubentry instead of subschemaSubentry. + // Note the correct case/spelling as per RFC 2251. + if (is_null($dn)) { + // get the subschema entry via root dse + $dse = $ldap->rootDSE(array('subSchemaSubentry')); + if (false == Net_LDAP2::isError($dse)) { + $base = $dse->getValue('subSchemaSubentry', 'single'); + if (!Net_LDAP2::isError($base)) { + $dn = $base; + } + } + } + + // Final fallback case where there is no subschemaSubentry attribute + // in the root DSE (this is a bug for an LDAP v3 server so report this + // to your LDAP vendor if you get this far). + if (is_null($dn)) { + $dn = 'cn=Subschema'; + } + + // fetch the subschema entry + $result = $ldap->search($dn, '(objectClass=*)', + array('attributes' => array_values($schema_o->types), + 'scope' => 'base')); + if (Net_LDAP2::isError($result)) { + return $result; + } + + $entry = $result->shiftEntry(); + if (!$entry instanceof Net_LDAP2_Entry) { + return PEAR::raiseError('Could not fetch Subschema entry'); + } + + $schema_o->parse($entry); + return $schema_o; + } + + /** + * Return a hash of entries for the given type + * + * Returns a hash of entry for th givene type. Types may be: + * objectclasses, attributes, ditcontentrules, ditstructurerules, matchingrules, + * matchingruleuses, nameforms, syntaxes + * + * @param string $type Type to fetch + * + * @access public + * @return array|Net_LDAP2_Error Array or Net_LDAP2_Error + */ + public function &getAll($type) + { + $map = array('objectclasses' => &$this->_objectClasses, + 'attributes' => &$this->_attributeTypes, + 'ditcontentrules' => &$this->_dITContentRules, + 'ditstructurerules' => &$this->_dITStructureRules, + 'matchingrules' => &$this->_matchingRules, + 'matchingruleuses' => &$this->_matchingRuleUse, + 'nameforms' => &$this->_nameForms, + 'syntaxes' => &$this->_ldapSyntaxes ); + + $key = strtolower($type); + $ret = ((key_exists($key, $map)) ? $map[$key] : PEAR::raiseError("Unknown type $type")); + return $ret; + } + + /** + * Return a specific entry + * + * @param string $type Type of name + * @param string $name Name or OID to fetch + * + * @access public + * @return mixed Entry or Net_LDAP2_Error + */ + public function &get($type, $name) + { + if ($this->_initialized) { + $type = strtolower($type); + if (false == key_exists($type, $this->types)) { + return PEAR::raiseError("No such type $type"); + } + + $name = strtolower($name); + $type_var = &$this->{'_' . $this->types[$type]}; + + if (key_exists($name, $type_var)) { + return $type_var[$name]; + } elseif (key_exists($name, $this->_oids) && $this->_oids[$name]['type'] == $type) { + return $this->_oids[$name]; + } else { + return PEAR::raiseError("Could not find $type $name"); + } + } else { + $return = null; + return $return; + } + } + + + /** + * Fetches attributes that MAY be present in the given objectclass + * + * @param string $oc Name or OID of objectclass + * + * @access public + * @return array|Net_LDAP2_Error Array with attributes or Net_LDAP2_Error + */ + public function may($oc) + { + return $this->_getAttr($oc, 'may'); + } + + /** + * Fetches attributes that MUST be present in the given objectclass + * + * @param string $oc Name or OID of objectclass + * + * @access public + * @return array|Net_LDAP2_Error Array with attributes or Net_LDAP2_Error + */ + public function must($oc) + { + return $this->_getAttr($oc, 'must'); + } + + /** + * Fetches the given attribute from the given objectclass + * + * @param string $oc Name or OID of objectclass + * @param string $attr Name of attribute to fetch + * + * @access protected + * @return array|Net_LDAP2_Error The attribute or Net_LDAP2_Error + */ + protected function _getAttr($oc, $attr) + { + $oc = strtolower($oc); + if (key_exists($oc, $this->_objectClasses) && key_exists($attr, $this->_objectClasses[$oc])) { + return $this->_objectClasses[$oc][$attr]; + } elseif (key_exists($oc, $this->_oids) && + $this->_oids[$oc]['type'] == 'objectclass' && + key_exists($attr, $this->_oids[$oc])) { + return $this->_oids[$oc][$attr]; + } else { + return PEAR::raiseError("Could not find $attr attributes for $oc "); + } + } + + /** + * Returns the name(s) of the immediate superclass(es) + * + * @param string $oc Name or OID of objectclass + * + * @access public + * @return array|Net_LDAP2_Error Array of names or Net_LDAP2_Error + */ + public function superclass($oc) + { + $o = $this->get('objectclass', $oc); + if (Net_LDAP2::isError($o)) { + return $o; + } + return (key_exists('sup', $o) ? $o['sup'] : array()); + } + + /** + * Parses the schema of the given Subschema entry + * + * @param Net_LDAP2_Entry &$entry Subschema entry + * + * @access public + * @return void + */ + public function parse(&$entry) + { + foreach ($this->types as $type => $attr) { + // initialize map type to entry + $type_var = '_' . $attr; + $this->{$type_var} = array(); + + // get values for this type + if ($entry->exists($attr)) { + $values = $entry->getValue($attr); + if (is_array($values)) { + foreach ($values as $value) { + + unset($schema_entry); // this was a real mess without it + + // get the schema entry + $schema_entry = $this->_parse_entry($value); + + // set the type + $schema_entry['type'] = $type; + + // save a ref in $_oids + $this->_oids[$schema_entry['oid']] = &$schema_entry; + + // save refs for all names in type map + $names = $schema_entry['aliases']; + array_push($names, $schema_entry['name']); + foreach ($names as $name) { + $this->{$type_var}[strtolower($name)] = &$schema_entry; + } + } + } + } + } + $this->_initialized = true; + } + + /** + * Parses an attribute value into a schema entry + * + * @param string $value Attribute value + * + * @access protected + * @return array|false Schema entry array or false + */ + protected function &_parse_entry($value) + { + // tokens that have no value associated + $noValue = array('single-value', + 'obsolete', + 'collective', + 'no-user-modification', + 'abstract', + 'structural', + 'auxiliary'); + + // tokens that can have multiple values + $multiValue = array('must', 'may', 'sup'); + + $schema_entry = array('aliases' => array()); // initilization + + $tokens = $this->_tokenize($value); // get an array of tokens + + // remove surrounding brackets + if ($tokens[0] == '(') array_shift($tokens); + if ($tokens[count($tokens) - 1] == ')') array_pop($tokens); // -1 doesnt work on arrays :-( + + $schema_entry['oid'] = array_shift($tokens); // first token is the oid + + // cycle over the tokens until none are left + while (count($tokens) > 0) { + $token = strtolower(array_shift($tokens)); + if (in_array($token, $noValue)) { + $schema_entry[$token] = 1; // single value token + } else { + // this one follows a string or a list if it is multivalued + if (($schema_entry[$token] = array_shift($tokens)) == '(') { + // this creates the list of values and cycles through the tokens + // until the end of the list is reached ')' + $schema_entry[$token] = array(); + while ($tmp = array_shift($tokens)) { + if ($tmp == ')') break; + if ($tmp != '$') array_push($schema_entry[$token], $tmp); + } + } + // create a array if the value should be multivalued but was not + if (in_array($token, $multiValue) && !is_array($schema_entry[$token])) { + $schema_entry[$token] = array($schema_entry[$token]); + } + } + } + // get max length from syntax + if (key_exists('syntax', $schema_entry)) { + if (preg_match('/{(\d+)}/', $schema_entry['syntax'], $matches)) { + $schema_entry['max_length'] = $matches[1]; + } + } + // force a name + if (empty($schema_entry['name'])) { + $schema_entry['name'] = $schema_entry['oid']; + } + // make one name the default and put the other ones into aliases + if (is_array($schema_entry['name'])) { + $aliases = $schema_entry['name']; + $schema_entry['name'] = array_shift($aliases); + $schema_entry['aliases'] = $aliases; + } + return $schema_entry; + } + + /** + * Tokenizes the given value into an array of tokens + * + * @param string $value String to parse + * + * @access protected + * @return array Array of tokens + */ + protected function _tokenize($value) + { + $tokens = array(); // array of tokens + $matches = array(); // matches[0] full pattern match, [1,2,3] subpatterns + + // this one is taken from perl-ldap, modified for php + $pattern = "/\s* (?:([()]) | ([^'\s()]+) | '((?:[^']+|'[^\s)])*)') \s*/x"; + + /** + * This one matches one big pattern wherin only one of the three subpatterns matched + * We are interested in the subpatterns that matched. If it matched its value will be + * non-empty and so it is a token. Tokens may be round brackets, a string, or a string + * enclosed by ' + */ + preg_match_all($pattern, $value, $matches); + + for ($i = 0; $i < count($matches[0]); $i++) { // number of tokens (full pattern match) + for ($j = 1; $j < 4; $j++) { // each subpattern + if (null != trim($matches[$j][$i])) { // pattern match in this subpattern + $tokens[$i] = trim($matches[$j][$i]); // this is the token + } + } + } + return $tokens; + } + + /** + * Returns wether a attribute syntax is binary or not + * + * This method gets used by Net_LDAP2_Entry to decide which + * PHP function needs to be used to fetch the value in the + * proper format (e.g. binary or string) + * + * @param string $attribute The name of the attribute (eg.: 'sn') + * + * @access public + * @return boolean + */ + public function isBinary($attribute) + { + $return = false; // default to false + + // This list contains all syntax that should be treaten as + // containing binary values + // The Syntax Definitons go into constants at the top of this page + $syntax_binary = array( + NET_LDAP2_SYNTAX_OCTET_STRING, + NET_LDAP2_SYNTAX_JPEG + ); + + // Check Syntax + $attr_s = $this->get('attribute', $attribute); + if (Net_LDAP2::isError($attr_s)) { + // Attribute not found in schema + $return = false; // consider attr not binary + } elseif (isset($attr_s['syntax']) && in_array($attr_s['syntax'], $syntax_binary)) { + // Syntax is defined as binary in schema + $return = true; + } else { + // Syntax not defined as binary, or not found + // if attribute is a subtype, check superior attribute syntaxes + if (isset($attr_s['sup'])) { + foreach ($attr_s['sup'] as $superattr) { + $return = $this->isBinary($superattr); + if ($return) { + break; // stop checking parents since we are binary + } + } + } + } + + return $return; + } + + // [TODO] add method that allows us to see to which objectclasses a certain attribute belongs to + // it should return the result structured, e.g. sorted in "may" and "must". Optionally it should + // be able to return it just "flat", e.g. array_merge()d. + // We could use get_all() to achieve this easily, i think +} +?> |