277 lines
7.1 KiB
PHP
277 lines
7.1 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.ldap-account-manager.org/)
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Copyright (C) 2003 - 2009 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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/** LDAP schema */
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include_once("schema.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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private $conf;
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/** Server handle */
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private $server;
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private $is_connected = false;
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/** LDAP username used for bind */
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private $username;
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/** LDAP password used for bind */
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private $password;
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/** Random number (changes on every page request) */
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private $rand;
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/**
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* @param object $config an object of class Config
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*/
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function __construct($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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* @param boolean $allowAnonymous specifies if anonymous binds are allowed
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* @return mixed if connect succeeds the server handle is returned, else false
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*/
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function connect($user, $passwd, $allowAnonymous=false) {
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// close any prior connection
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@$this->close();
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// do not allow anonymous bind
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if (!$allowAnonymous && ((!$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($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
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// start TLS if specified
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$useTLS = $this->conf->getUseTLS();
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if (isset($useTLS) && ($useTLS == "yes")) {
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@ldap_start_tls($this->server);
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// connect without TLS if it failed
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if (ldap_errno($this->server) != 0) {
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return ldap_errno($this->server);
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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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$return = ldap_errno($this->server);
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$this->is_connected = true;
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// return success number
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return $return;
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}
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// return error number
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else return ldap_errno($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($this->server);
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}
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/**
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* Returns the LDAP connection handle
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*
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* @return object connection handle
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*/
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function server() {
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if (!$this->is_connected) {
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$data = $this->decrypt_login();
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$this->connect($data[0], $data[1]);
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$this->is_connected = true;
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}
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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", "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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$this->is_connected = false;
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$this->rand = mt_rand();
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// delete PDF files and images which are older than 10 min
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$tmpDir = dirname(__FILE__) . '/../tmp/';
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$time = time();
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$dir = @opendir($tmpDir);
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$file = @readdir($dir);
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while ($file) {
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if ((substr($file, -4) == '.pdf') || (substr($file, -4) == '.jpg')) {
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$path = $tmpDir . $file;
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if ($time - filemtime($path) > 600) {
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@unlink($path);
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}
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}
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$file = @readdir($dir);
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}
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@closedir($dir);
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}
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/**
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* Calculates a new value for rand
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*
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* @return int New random value
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*/
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function new_rand() {
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$r = mt_rand();
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$this->rand = $r;
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return $r;
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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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// MCrypt may have been enabled in a running session
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if (!isset($_COOKIE["IV"]) || ($_COOKIE["IV"] == '')) return $data;
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if ($_COOKIE["IV"] == "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx") {
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return $data;
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}
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// read key and iv from cookie
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$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, $key, base64_encode($data), MCRYPT_MODE_ECB, $iv);
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}
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// otherwise do not encrypt
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else {
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return $data;
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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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// MCrypt may have been enabled in a running session
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if (!isset($_COOKIE["IV"]) || ($_COOKIE["IV"] == '')) return $data;
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if ($_COOKIE["IV"] == "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx") {
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return $data;
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}
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// read key and iv from cookie
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$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 = base64_decode(str_replace(chr(00), "", $ret));
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return $ret;
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}
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// otherwise do not decrypt
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else {
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return $data;
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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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?>
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