379 lines
10 KiB
PHP
379 lines
10 KiB
PHP
<?php
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/*
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$Id$
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This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
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Copyright (C) 2003 Roland Gruber
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* ldap.inc provides basic functions to connect to the OpenLDAP server.
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*
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* @package LDAP
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* @author Roland Gruber
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*/
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/** Access to configuration data */
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include_once("config.inc");
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/** Encryption functions */
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include_once("blowfish.inc");
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/**
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* Converts a HEX string to a binary value
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*
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* @param string $value HEX string
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* @return binary result binary
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*/
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function hex2bin($value) {
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return pack("H*", $value);
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}
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/**
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* Ldap manages connection to LDAP and includes several helper functions.
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*
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* @package LDAP
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*/
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class Ldap{
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/** Object of Config to access preferences */
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var $conf;
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/** Server handle */
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var $server;
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/** LDAP username used for bind */
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var $username;
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/** LDAP password used for bind */
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var $password;
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/** Array with all objectClass strings from the LDAP server */
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var $objectClasses;
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// Capabilities of the LDAP server
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/** Host attribute in inetOrgPerson */
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var $supports_unix_hosts = false;
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/** ObjectClass sambaAccount */
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var $supports_samba2_schema = false;
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/** ObjectClass sambaSamAccount */
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var $supports_samba3_schema = false;
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/** Random number (changes on every page request) */
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var $rand;
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/**
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* @param object $config an object of class Config
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*/
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function Ldap($config) {
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setlanguage();
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if (is_object($config)) $this->conf = $config;
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else return false;
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mt_srand((double)microtime()*1000000);
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$this->rand = mt_rand();
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return true;
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}
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/**
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* Connects to the server using the given username and password
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*
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* @param string $user user name
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* @param string $passwd password
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* @return mixed if connect succeeds the server handle is returned, else false
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*/
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function connect($user, $passwd) {
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// close any prior connection
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@$this->close();
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// do not allow anonymous bind
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if ((!$user)||($user == "")||(!$passwd)) {
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return false;
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}
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// save password und username encrypted
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$this->encrypt_login($user, $passwd);
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$this->server = @ldap_connect($this->conf->get_ServerURL());
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if ($this->server) {
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// use LDAPv3
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ldap_set_option($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
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// start TLS if possible
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if (function_exists('ldap_start_tls')) {
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@ldap_start_tls($this->server);
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// connect without TLS if it failed
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if (ldap_errno($this->server) != 0) {
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@ldap_close($this->server);
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$this->server = @ldap_connect($this->conf->get_ServerURL());
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ldap_set_option($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
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}
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}
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$bind = @ldap_bind($this->server, $user, $passwd);
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if ($bind) {
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// read objectClasses from server and update capabilities if needed
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if (! $this->objectClasses) {
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$this->updateClasses();
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$this->updateCapabilities();
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}
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// return success number
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return ldap_errno($this->server);
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}
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// return error number
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else return ldap_errno($this->server);
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}
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else return false;
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}
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/** Closes connection to server */
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function close() {
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@ldap_close($this->server);
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}
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/**
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* Returns an array with all organizational units under the given suffix
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*
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* @param string $suffix search suffix
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* @return array DNs of organizational units
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*/
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function search_units($suffix) {
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$ret = array();
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$sr = @ldap_search($this->server(), $suffix, "objectClass=organizationalunit", array("DN"));
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if ($sr) {
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$units = ldap_get_entries($this->server, $sr);
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// extract Dns
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for ($i = 0; $i < sizeof($units); $i++) {
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if ($units[$i]['dn']) $ret[] = $units[$i]['dn'];
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}
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}
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// add root suffix if needed
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$found = false;
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for ($i = 0; $i < sizeof($ret); $i++) { // search suffix case-intensitive
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if (strtolower($suffix) == strtolower($ret[$i])) {
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$found = true;
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break;
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}
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}
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if (!$found) {
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$ret[] = $suffix;
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}
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usort($ret, array($this,"cmp_array"));
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return $ret;
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}
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/** Reads the array of objectClasses from the LDAP server */
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function updateClasses() {
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// read from default cn
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$sr = @ldap_read($this->server, 'cn=subschema', '(objectClass=*)', array('objectclasses'));
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// if default was not correct check different cn
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if (!$sr) $sr = @ldap_read($this->server, 'cn=schema', '(objectClass=*)', array('objectclasses'));
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if ($sr) {
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// get search result and save it
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$info = @ldap_get_entries($this->server,$sr);
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if ($info) {
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$this->objectClasses = $info[0]['objectclasses'];
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array_shift($this->objectClasses);
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return;
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}
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}
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// if search failed save empty result
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$this->objectClasses = array();
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}
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/** Updates the capabilities values (var $supports_*) */
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function updateCapabilities() {
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for ($i = 0; $i < sizeof($this->objectClasses); $i++) {
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$line = $this->objectClasses[$i];
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// search keywords
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if (strpos($line, "NAME 'inetOrgPerson'") && strpos($line, " host ")) $this->supports_unix_hosts = true;
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if (strpos($line, "NAME 'sambaAccount'")) $this->supports_samba2_schema = true;
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if (strpos($line, "NAME 'sambaSamAccount'")) $this->supports_samba3_schema = true;
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}
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}
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/**
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* Returns the LDAP connection handle
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*
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* @return object connection handle
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*/
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function server() {
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return $this->server;
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}
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/** Closes connection to LDAP server before serialization */
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function __sleep() {
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$this->close();
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// define which attributes to save
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return array("conf", "username", "password", "ldapUserAttributes", "ldapGroupAttributes",
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"ldapHostAttributes", "objectClasses", "supports_unix_hosts", "supports_samba2_schema",
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"supports_samba3_schema", "rand");
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}
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/** Reconnects to LDAP server when deserialized */
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function __wakeup() {
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$data = $this->decrypt_login();
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$this->connect($data[0], $data[1]);
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$this->rand = mt_rand();
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// delete PDF files which are older than 10 min
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if (isset($_SESSION['lampath'])) {
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$relpath = $_SESSION['lampath'] . 'tmp/';
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$time = time();
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$dir = @opendir($relpath);
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while ($file = @readdir($dir)) {
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if (substr($file, -4) == '.pdf') {
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$path = $relpath . $file;
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if ($time - filemtime($path) > 600) {
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@unlink($path);
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}
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}
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}
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@closedir($dir);
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}
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}
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/** Calculates a new value for rand */
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function new_rand() {
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$this->rand = mt_rand();
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}
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/**
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* Encrypts a string
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*
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* @param string $data string to encrypt
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* @return object encrypted string
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*/
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function encrypt($data) {
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// use MCrypt if available
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if (function_exists('mcrypt_create_iv')) {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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// encrypt string
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return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB, $iv);
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}
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// use Blowfish if MCrypt is not available
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else {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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$b_key = $iv . $key;
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// encrypt string
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$b_fish = new Cipher_blowfish();
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return $b_fish->encrypt($data, $b_key);
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}
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}
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/**
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* Decrypts a string
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*
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* @param object $data string to decrypt
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* @return string decrypted string
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*/
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function decrypt($data) {
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// use MCrypt if available
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if (function_exists('mcrypt_create_iv')) {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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// decrypt string
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$ret = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB, $iv);
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$ret = str_replace(chr(00), "", $ret);
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return $ret;
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}
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// use Blowfish if MCrypt is not available
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else {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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$b_key = $iv . $key;
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// decrypt string
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$b_fish = new Cipher_blowfish();
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return $b_fish->decrypt($data, $b_key);
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}
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}
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/**
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* Encrypts username and password
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*
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* @param string $username LDAP user name
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* @param string $password LDAP password
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*/
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function encrypt_login($username, $password) {
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// encrypt username and password
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$this->username = base64_encode($this->encrypt($username));
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$this->password = base64_encode($this->encrypt($password));
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}
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/**
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* Decrypts username and password
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*
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* @return array array(user name, password)
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*/
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function decrypt_login() {
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// decrypt username and password
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$username = $this->decrypt(base64_decode($this->username));
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$password = $this->decrypt(base64_decode($this->password));
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$ret = array($username, $password);
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return $ret;
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}
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/** Closes connection to LDAP server and deletes encrypted username/password */
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function destroy() {
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$this->close();
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$this->username="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
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$this->password="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
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}
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/**
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* Helper function to sort the unit DNs
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*
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* @param string $a first argument to compare
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* @param string $b second argument to compare
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* @return integer 0 if equal, 1 if $a is greater, -1 if $b is greater
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*/
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function cmp_array($a, $b) {
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// split DNs
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$array_a = explode(",", $a);
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$array_b = explode(",", $b);
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$len_a = sizeof($array_a);
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$len_b = sizeof($array_b);
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// check how many parts to compare
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$len = min($len_a, $len_b);
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// compare from last part on
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for ($i = 0; $i < $len; $i++) {
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// get parts to compare
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$part_a = strtolower($array_a[$len_a - $i - 1]);
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$part_b = strtolower($array_b[$len_b - $i - 1]);
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// compare parts
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if ($part_a == $part_b) { // part is identical
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if ($i == ($len - 1)) {
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if ($len_a > $len_b) return 1;
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elseif ($len_a < $len_b) return -1;
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else return 0; // DNs are identical
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}
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}
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elseif ($part_a == max($part_a, $part_b)) return 1;
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else return -1;
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}
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return -1;
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}
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}
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?>
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