332 lines
13 KiB
PHP
332 lines
13 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet, the distributed open-source microblogging tool
|
|
*
|
|
* Plugin to enable LDAP Authentication
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* LICENCE: This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* @category Plugin
|
|
* @package StatusNet
|
|
* @author Craig Andrews <candrews@integralblue.com>
|
|
* @copyright 2009 Craig Andrews http://candrews.integralblue.com
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
if (!defined('STATUSNET') && !defined('LACONICA')) {
|
|
exit(1);
|
|
}
|
|
|
|
require_once INSTALLDIR.'/plugins/Authentication/AuthenticationPlugin.php';
|
|
require_once 'Net/LDAP2.php';
|
|
|
|
class LdapAuthenticationPlugin extends AuthenticationPlugin
|
|
{
|
|
public $host=null;
|
|
public $port=null;
|
|
public $version=null;
|
|
public $starttls=null;
|
|
public $binddn=null;
|
|
public $bindpw=null;
|
|
public $basedn=null;
|
|
public $options=null;
|
|
public $filter=null;
|
|
public $scope=null;
|
|
public $password_encoding=null;
|
|
public $attributes=array();
|
|
|
|
function onInitializePlugin(){
|
|
parent::onInitializePlugin();
|
|
if(!isset($this->host)){
|
|
throw new Exception("must specify a host");
|
|
}
|
|
if(!isset($this->basedn)){
|
|
throw new Exception("must specify a basedn");
|
|
}
|
|
if(!isset($this->attributes['nickname'])){
|
|
throw new Exception("must specify a nickname attribute");
|
|
}
|
|
if(!isset($this->attributes['username'])){
|
|
throw new Exception("must specify a username attribute");
|
|
}
|
|
if($this->password_changeable && (! isset($this->attributes['password']) || !isset($this->password_encoding))){
|
|
throw new Exception("if password_changeable is set, the password attribute and password_encoding must also be specified");
|
|
}
|
|
}
|
|
|
|
//---interface implementation---//
|
|
|
|
function checkPassword($username, $password)
|
|
{
|
|
$entry = $this->ldap_get_user($username);
|
|
if(!$entry){
|
|
return false;
|
|
}else{
|
|
$config = $this->ldap_get_config();
|
|
$config['binddn']=$entry->dn();
|
|
$config['bindpw']=$password;
|
|
if($this->ldap_get_connection($config)){
|
|
return true;
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
function autoRegister($username)
|
|
{
|
|
$entry = $this->ldap_get_user($username,$this->attributes);
|
|
if($entry){
|
|
$registration_data = array();
|
|
foreach($this->attributes as $sn_attribute=>$ldap_attribute){
|
|
$registration_data[$sn_attribute]=$entry->getValue($ldap_attribute,'single');
|
|
}
|
|
if(isset($registration_data['email']) && !empty($registration_data['email'])){
|
|
$registration_data['email_confirmed']=true;
|
|
}
|
|
//set the database saved password to a random string.
|
|
$registration_data['password']=common_good_rand(16);
|
|
return User::register($registration_data);
|
|
}else{
|
|
//user isn't in ldap, so we cannot register him
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function changePassword($username,$oldpassword,$newpassword)
|
|
{
|
|
if(! isset($this->attributes['password']) || !isset($this->password_encoding)){
|
|
//throw new Exception(_('Sorry, changing LDAP passwords is not supported at this time'));
|
|
return false;
|
|
}
|
|
$entry = $this->ldap_get_user($username);
|
|
if(!$entry){
|
|
return false;
|
|
}else{
|
|
$config = $this->ldap_get_config();
|
|
$config['binddn']=$entry->dn();
|
|
$config['bindpw']=$oldpassword;
|
|
if($ldap = $this->ldap_get_connection($config)){
|
|
$entry = $this->ldap_get_user($username,array(),$ldap);
|
|
|
|
$newCryptedPassword = $this->hashPassword($newpassword, $this->password_encoding);
|
|
if ($newCryptedPassword===false) {
|
|
return false;
|
|
}
|
|
if($this->password_encoding=='ad') {
|
|
//TODO I believe this code will work once this bug is fixed: http://pear.php.net/bugs/bug.php?id=16796
|
|
$oldCryptedPassword = $this->hashPassword($oldpassword, $this->password_encoding);
|
|
$entry->delete( array($this->attributes['password'] => $oldCryptedPassword ));
|
|
}
|
|
$entry->replace( array($this->attributes['password'] => $newCryptedPassword ), true);
|
|
if( Net_LDAP2::isError($entry->upate()) ) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
//---utility functions---//
|
|
function ldap_get_config(){
|
|
$config = array();
|
|
$keys = array('host','port','version','starttls','binddn','bindpw','basedn','options','filter','scope');
|
|
foreach($keys as $key){
|
|
$value = $this->$key;
|
|
if($value!==null){
|
|
$config[$key]=$value;
|
|
}
|
|
}
|
|
return $config;
|
|
}
|
|
|
|
function ldap_get_connection($config = null){
|
|
if($config == null){
|
|
$config = $this->ldap_get_config();
|
|
}
|
|
|
|
//cannot use Net_LDAP2::connect() as StatusNet uses
|
|
//PEAR::setErrorHandling(PEAR_ERROR_CALLBACK, 'handleError');
|
|
//PEAR handling can be overridden on instance objects, so we do that.
|
|
$ldap = new Net_LDAP2($config);
|
|
$ldap->setErrorHandling(PEAR_ERROR_RETURN);
|
|
$err=$ldap->bind();
|
|
if (Net_LDAP2::isError($err)) {
|
|
common_log(LOG_WARNING, 'Could not connect to LDAP server: '.$err->getMessage());
|
|
return false;
|
|
}
|
|
return $ldap;
|
|
}
|
|
|
|
/**
|
|
* get an LDAP entry for a user with a given username
|
|
*
|
|
* @param string $username
|
|
* $param array $attributes LDAP attributes to retrieve
|
|
* @return string DN
|
|
*/
|
|
function ldap_get_user($username,$attributes=array(),$ldap=null){
|
|
if($ldap==null) {
|
|
$ldap = $this->ldap_get_connection();
|
|
}
|
|
$filter = Net_LDAP2_Filter::create($this->attributes['username'], 'equals', $username);
|
|
$options = array(
|
|
'scope' => 'sub',
|
|
'attributes' => $attributes
|
|
);
|
|
$search = $ldap->search(null,$filter,$options);
|
|
|
|
if (PEAR::isError($search)) {
|
|
common_log(LOG_WARNING, 'Error while getting DN for user: '.$search->getMessage());
|
|
return false;
|
|
}
|
|
|
|
if($search->count()==0){
|
|
return false;
|
|
}else if($search->count()==1){
|
|
$entry = $search->shiftEntry();
|
|
return $entry;
|
|
}else{
|
|
common_log(LOG_WARNING, 'Found ' . $search->count() . ' ldap user with the username: ' . $username);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Code originaly from the phpLDAPadmin development team
|
|
* http://phpldapadmin.sourceforge.net/
|
|
*
|
|
* Hashes a password and returns the hash based on the specified enc_type.
|
|
*
|
|
* @param string $passwordClear The password to hash in clear text.
|
|
* @param string $encodageType Standard LDAP encryption type which must be one of
|
|
* crypt, ext_des, md5crypt, blowfish, md5, sha, smd5, ssha, or clear.
|
|
* @return string The hashed password.
|
|
*
|
|
*/
|
|
|
|
function hashPassword( $passwordClear, $encodageType )
|
|
{
|
|
$encodageType = strtolower( $encodageType );
|
|
switch( $encodageType ) {
|
|
case 'crypt':
|
|
$cryptedPassword = '{CRYPT}' . crypt($passwordClear,$this->randomSalt(2));
|
|
break;
|
|
|
|
case 'ext_des':
|
|
// extended des crypt. see OpenBSD crypt man page.
|
|
if ( ! defined( 'CRYPT_EXT_DES' ) || CRYPT_EXT_DES == 0 ) {return FALSE;} //Your system crypt library does not support extended DES encryption.
|
|
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear, '_' . $this->randomSalt(8) );
|
|
break;
|
|
|
|
case 'md5crypt':
|
|
if( ! defined( 'CRYPT_MD5' ) || CRYPT_MD5 == 0 ) {return FALSE;} //Your system crypt library does not support md5crypt encryption.
|
|
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$1$' . $this->randomSalt(9) );
|
|
break;
|
|
|
|
case 'blowfish':
|
|
if( ! defined( 'CRYPT_BLOWFISH' ) || CRYPT_BLOWFISH == 0 ) {return FALSE;} //Your system crypt library does not support blowfish encryption.
|
|
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$2a$12$' . $this->randomSalt(13) ); // hardcoded to second blowfish version and set number of rounds
|
|
break;
|
|
|
|
case 'md5':
|
|
$cryptedPassword = '{MD5}' . base64_encode( pack( 'H*' , md5( $passwordClear) ) );
|
|
break;
|
|
|
|
case 'sha':
|
|
if( function_exists('sha1') ) {
|
|
// use php 4.3.0+ sha1 function, if it is available.
|
|
$cryptedPassword = '{SHA}' . base64_encode( pack( 'H*' , sha1( $passwordClear) ) );
|
|
} elseif( function_exists( 'mhash' ) ) {
|
|
$cryptedPassword = '{SHA}' . base64_encode( mhash( MHASH_SHA1, $passwordClear) );
|
|
} else {
|
|
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
|
|
}
|
|
break;
|
|
|
|
case 'ssha':
|
|
if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
|
|
mt_srand( (double) microtime() * 1000000 );
|
|
$salt = mhash_keygen_s2k( MHASH_SHA1, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 );
|
|
$cryptedPassword = "{SSHA}".base64_encode( mhash( MHASH_SHA1, $passwordClear.$salt ).$salt );
|
|
} else {
|
|
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
|
|
}
|
|
break;
|
|
|
|
case 'smd5':
|
|
if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
|
|
mt_srand( (double) microtime() * 1000000 );
|
|
$salt = mhash_keygen_s2k( MHASH_MD5, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 );
|
|
$cryptedPassword = "{SMD5}".base64_encode( mhash( MHASH_MD5, $passwordClear.$salt ).$salt );
|
|
} else {
|
|
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
|
|
}
|
|
break;
|
|
|
|
case 'ad':
|
|
$cryptedPassword = '';
|
|
$passwordClear = "\"" . $passwordClear . "\"";
|
|
$len = strlen($passwordClear);
|
|
for ($i = 0; $i < $len; $i++) {
|
|
$cryptedPassword .= "{$passwordClear{$i}}\000";
|
|
}
|
|
|
|
case 'clear':
|
|
default:
|
|
$cryptedPassword = $passwordClear;
|
|
}
|
|
|
|
return $cryptedPassword;
|
|
}
|
|
|
|
/**
|
|
* Code originaly from the phpLDAPadmin development team
|
|
* http://phpldapadmin.sourceforge.net/
|
|
*
|
|
* Used to generate a random salt for crypt-style passwords. Salt strings are used
|
|
* to make pre-built hash cracking dictionaries difficult to use as the hash algorithm uses
|
|
* not only the user's password but also a randomly generated string. The string is
|
|
* stored as the first N characters of the hash for reference of hashing algorithms later.
|
|
*
|
|
* --- added 20021125 by bayu irawan <bayuir@divnet.telkom.co.id> ---
|
|
* --- ammended 20030625 by S C Rigler <srigler@houston.rr.com> ---
|
|
*
|
|
* @param int $length The length of the salt string to generate.
|
|
* @return string The generated salt string.
|
|
*/
|
|
|
|
function randomSalt( $length )
|
|
{
|
|
$possible = '0123456789'.
|
|
'abcdefghijklmnopqrstuvwxyz'.
|
|
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
|
|
'./';
|
|
$str = "";
|
|
mt_srand((double)microtime() * 1000000);
|
|
|
|
while( strlen( $str ) < $length )
|
|
$str .= substr( $possible, ( rand() % strlen( $possible ) ), 1 );
|
|
|
|
return $str;
|
|
}
|
|
}
|