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Diffstat (limited to 'plugins/LdapCommon/LdapCommon.php')
| -rw-r--r-- | plugins/LdapCommon/LdapCommon.php | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/plugins/LdapCommon/LdapCommon.php b/plugins/LdapCommon/LdapCommon.php new file mode 100644 index 000000000..1f1647a75 --- /dev/null +++ b/plugins/LdapCommon/LdapCommon.php @@ -0,0 +1,369 @@ +<?php +/** + * StatusNet, the distributed open-source microblogging tool + * + * Utility class of LDAP functions + * + * 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 Free Software Foundation, Inc http://www.fsf.org + * @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); +} + +// We bundle the Net/LDAP2 library... +set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib'); + +class LdapCommon +{ + protected static $ldap_connections = array(); + 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 $uniqueMember_attribute = null; + public $attributes=array(); + public $password_encoding=null; + + public function __construct($config) + { + Event::addHandler('Autoload',array($this,'onAutoload')); + foreach($config as $key=>$value) { + $this->$key = $value; + } + $this->ldap_config = $this->get_ldap_config(); + + if(!isset($this->host)){ + throw new Exception("must specify a host"); + } + if(!isset($this->basedn)){ + throw new Exception("must specify a basedn"); + } + if(!isset($this->attributes['username'])){ + throw new Exception("username attribute must be set."); + } + } + + function onAutoload($cls) + { + switch ($cls) + { + case 'MemcacheSchemaCache': + require_once(INSTALLDIR.'/plugins/LdapCommon/MemcacheSchemaCache.php'); + return false; + case 'Net_LDAP2': + require_once 'Net/LDAP2.php'; + return false; + case 'Net_LDAP2_Filter': + require_once 'Net/LDAP2/Filter.php'; + return false; + case 'Net_LDAP2_Filter': + require_once 'Net/LDAP2/Filter.php'; + return false; + case 'Net_LDAP2_Entry': + require_once 'Net/LDAP2/Entry.php'; + return false; + } + } + + function get_ldap_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 $config; + } + + function get_ldap_connection($config = null){ + if($config == null) { + $config = $this->ldap_config; + } + $config_id = crc32(serialize($config)); + if(array_key_exists($config_id,self::$ldap_connections)) { + $ldap = self::$ldap_connections[$config_id]; + } else { + //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($err)) { + // if we were called with a config, assume caller will handle + // incorrect username/password (LDAP_INVALID_CREDENTIALS) + if (isset($config) && $err->getCode() == 0x31) { + throw new LdapInvalidCredentialsException('Could not connect to LDAP server: '.$err->getMessage()); + } + throw new Exception('Could not connect to LDAP server: '.$err->getMessage()); + } + $c = common_memcache(); + if (!empty($c)) { + $cacheObj = new MemcacheSchemaCache( + array('c'=>$c, + 'cacheKey' => common_cache_key('ldap_schema:' . $config_id))); + $ldap->registerSchemaCache($cacheObj); + } + self::$ldap_connections[$config_id] = $ldap; + } + return $ldap; + } + + function checkPassword($username, $password) + { + $entry = $this->get_user($username); + if(!$entry){ + return false; + }else{ + $config = $this->get_ldap_config(); + $config['binddn']=$entry->dn(); + $config['bindpw']=$password; + try { + $this->get_ldap_connection($config); + } catch (LdapInvalidCredentialsException $e) { + return false; + } + return true; + } + } + + function changePassword($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 = $this->get_user($username); + if(!$entry){ + return false; + }else{ + $config = $this->get_ldap_config(); + $config['binddn']=$entry->dn(); + $config['bindpw']=$oldpassword; + try { + $ldap = $this->get_ldap_connection($config); + + $entry = $this->get_user($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; + } catch (LdapInvalidCredentialsException $e) { + return false; + } + } + + return false; + } + + function is_dn_member_of_group($userDn, $groupDn) + { + $ldap = $this->get_ldap_connection(); + $link = $ldap->getLink(); + $r = @ldap_compare($link, $groupDn, $this->uniqueMember_attribute, $userDn); + if ($r === true){ + return true; + }else if($r === false){ + return false; + }else{ + common_log(LOG_ERR, "LDAP error determining if userDn=$userDn is a member of groupDn=$groupDn using uniqueMember_attribute=$this->uniqueMember_attribute error: ".ldap_error($link)); + return false; + } + } + + /** + * get an LDAP entry for a user with a given username + * + * @param string $username + * $param array $attributes LDAP attributes to retrieve + * @return string DN + */ + function get_user($username,$attributes=array()){ + $ldap = $this->get_ldap_connection(); + $filter = Net_LDAP2_Filter::create($this->attributes['username'], 'equals', $username); + $options = array( + '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; + } + +} + +class LdapInvalidCredentialsException extends Exception +{ + +} |