mirror of
https://github.com/EGroupware/egroupware.git
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858 lines
29 KiB
PHP
858 lines
29 KiB
PHP
<?php
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/**
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* EGroupware API - Authentication
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <ralfbecker@outdoor-training.de>
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* @author Miles Lott <milos@groupwhere.org>
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* @copyright 2004 by Miles Lott <milos@groupwhere.org>
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* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
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* @package api
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* @subpackage auth
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* @version $Id$
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*/
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namespace EGroupware\Api;
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// allow to set an application depending authentication type (eg. for syncml, groupdav, ...)
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if (isset($GLOBALS['egw_info']['server']['auth_type_'.$GLOBALS['egw_info']['flags']['currentapp']]) &&
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$GLOBALS['egw_info']['server']['auth_type_'.$GLOBALS['egw_info']['flags']['currentapp']])
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{
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$GLOBALS['egw_info']['server']['auth_type'] = $GLOBALS['egw_info']['server']['auth_type_'.$GLOBALS['egw_info']['flags']['currentapp']];
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}
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if(empty($GLOBALS['egw_info']['server']['auth_type']))
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{
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$GLOBALS['egw_info']['server']['auth_type'] = 'sql';
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}
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//error_log('using auth_type='.$GLOBALS['egw_info']['server']['auth_type'].', currentapp='.$GLOBALS['egw_info']['flags']['currentapp']);
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/**
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* Authentication, password hashing and crypt functions
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*
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* Many functions based on code from Frank Thomas <frank@thomas-alfeld.de>
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* which can be seen at http://www.thomas-alfeld.de/frank/
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*
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* Other functions from class.common.inc.php originally from phpGroupWare
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*/
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class Auth
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{
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static $error;
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/**
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* Holds instance of backend
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*
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* @var auth_backend
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*/
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private $backend;
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/**
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* Specialchars as considered by crackcheck method
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*/
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const SPECIALCHARS = '~!@#$%^&*_-+=`|\(){}[]:;"\'<>,.?/';
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/**
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* Constructor
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*
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* @throws Exception\AssertionFailed if backend is not an Auth\Backend
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*/
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function __construct()
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{
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$this->backend = self::backend();
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}
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/**
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* Instanciate a backend
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*
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* @param Backend $type =null
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*/
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static function backend($type=null)
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{
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// do we have a hostname specific auth type set
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if (is_null($type) && !empty($GLOBALS['egw_info']['server']['auth_type_host']) &&
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Header\Http::host() === $GLOBALS['egw_info']['server']['auth_type_hostname'])
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{
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$type = $GLOBALS['egw_info']['server']['auth_type_host'];
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}
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if (is_null($type)) $type = $GLOBALS['egw_info']['server']['auth_type'];
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$backend_class = __CLASS__.'\\'.ucfirst($type);
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// try old location / name, if not found
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if (!class_exists($backend_class))
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{
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$backend_class = 'auth_'.$type;
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}
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$backend = new $backend_class;
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if (!($backend instanceof Auth\Backend))
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{
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throw new Exception\AssertionFailed("Auth backend class $backend_class is NO EGroupware\\Api\Auth\\Backend!");
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}
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return $backend;
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}
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/**
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* Attempt a SSO login
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*
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* @return string sessionid on successful login or null
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* @throws Exception\AssertionFailed
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*/
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static function login()
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{
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$backend = self::backend();
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return $backend instanceof Auth\BackendSSO ? $backend->login() : null;
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}
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/**
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* Attempt SSO logout
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*
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* @return null
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* @throws Exception\AssertionFailed
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*/
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static function logout()
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{
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$backend = self::backend();
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return $backend instanceof Auth\BackendSSO ? $backend->logout() : null;
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}
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/**
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* Return (which) parts of session needed by current auth backend
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*
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* If this returns any key(s), the session is NOT destroyed by Api\Session::destroy,
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* just everything but the keys is removed.
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*
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* @return array of needed keys in session
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*/
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static function needSession()
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{
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$backend = self::backend();
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return method_exists($backend, 'needSession') ? $backend->needSession() : [];
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}
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/**
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* check if users are supposed to change their password every x sdays, then check if password is of old age
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* or the devil-admin reset the users password and forced the user to change his password on next login.
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*
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* @param string& $message =null on return false: message why password needs to be changed
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* @return boolean true: all good, false: password change required, null: password expires in N days
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*/
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static function check_password_change(&$message=null)
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{
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// dont check anything for anonymous sessions/ users that are flagged as anonymous
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if (is_object($GLOBALS['egw']->session) && $GLOBALS['egw']->session->session_flags == 'A') return true;
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// some statics (and initialisation to make information and timecalculation a) more readable in conditions b) persistent per request
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// if user has to be warned about an upcomming passwordchange, remember for the session, that he was informed
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static $UserKnowsAboutPwdChange=null;
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if (is_null($UserKnowsAboutPwdChange)) $UserKnowsAboutPwdChange =& Cache::getSession('phpgwapi','auth_UserKnowsAboutPwdChange');
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// retrieve the timestamp regarding the last change of the password from auth system and store it with the session
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static $alpwchange_val=null;
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static $pwdTsChecked=null;
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if (is_null($pwdTsChecked) && is_null($alpwchange_val) || (string)$alpwchange_val === '0')
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{
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$alpwchange_val =& Cache::getSession('phpgwapi','auth_alpwchange_val'); // set that one with the session stored value
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// initalize statics - better readability of conditions
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if (is_null($alpwchange_val) || (string)$alpwchange_val === '0')
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{
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$backend = self::backend();
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// this may change behavior, as it should detect forced PasswordChanges from your Authentication System too.
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// on the other side, if your auth system does not require an forcedPasswordChange, you will not be asked.
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if (method_exists($backend,'getLastPwdChange'))
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{
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$alpwchange_val = $backend->getLastPwdChange($GLOBALS['egw']->session->account_lid);
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$pwdTsChecked = true;
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}
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// if your authsystem does not provide that information, its likely, that you cannot change your password there,
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// thus checking for expiration, is not needed
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if ($alpwchange_val === false)
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{
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$alpwchange_val = null;
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}
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//error_log(__METHOD__.__LINE__.'#'.$alpwchange_val.'# is null:'.is_null($alpwchange_val).'# is empty:'.empty($alpwchange_val).'# is set:'.isset($alpwchange_val));
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}
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}
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static $passwordAgeBorder=null;
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static $daysLeftUntilChangeReq=null;
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// if neither timestamp isset return true, nothing to do (exept this means the password is too old)
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if (is_null($alpwchange_val) &&
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empty($GLOBALS['egw_info']['server']['change_pwd_every_x_days']))
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{
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return true;
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}
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if (is_null($passwordAgeBorder) && $GLOBALS['egw_info']['server']['change_pwd_every_x_days'])
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{
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$passwordAgeBorder = (DateTime::to('now','ts')-($GLOBALS['egw_info']['server']['change_pwd_every_x_days']*86400));
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}
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if (is_null($daysLeftUntilChangeReq) && $GLOBALS['egw_info']['server']['warn_about_upcoming_pwd_change'])
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{
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// maxage - passwordage = days left until change is required
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$daysLeftUntilChangeReq = ($GLOBALS['egw_info']['server']['change_pwd_every_x_days'] - ((DateTime::to('now','ts')-($alpwchange_val?$alpwchange_val:0))/86400));
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}
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if ($alpwchange_val == 0 || // admin requested password change
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$passwordAgeBorder > $alpwchange_val || // change password every N days policy requests change
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// user should be warned N days in advance about change and is not yet
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$GLOBALS['egw_info']['server']['change_pwd_every_x_days'] &&
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$GLOBALS['egw_info']['user']['apps']['preferences'] &&
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$GLOBALS['egw_info']['server']['warn_about_upcoming_pwd_change'] &&
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$GLOBALS['egw_info']['server']['warn_about_upcoming_pwd_change'] > $daysLeftUntilChangeReq &&
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$UserKnowsAboutPwdChange !== true)
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{
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if ($alpwchange_val == 0)
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{
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$message = lang('An admin required that you must change your password upon login.');
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}
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elseif ($passwordAgeBorder > $alpwchange_val && $alpwchange_val > 0)
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{
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error_log(__METHOD__.' Password of '.$GLOBALS['egw_info']['user']['account_lid'].' ('.$GLOBALS['egw_info']['user']['account_fullname'].') is of old age.'.array2string(array(
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'ts'=> $alpwchange_val,
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'date'=>DateTime::to($alpwchange_val))));
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$message = lang('It has been more then %1 days since you changed your password',$GLOBALS['egw_info']['server']['change_pwd_every_x_days']);
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}
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else
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{
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// login page does not inform user about passwords about to expire
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if ($GLOBALS['egw_info']['flags']['currentapp'] != 'login' &&
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($GLOBALS['egw_info']['flags']['currentapp'] != 'home' ||
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strpos($_SERVER['SCRIPT_NAME'], '/home/') !== false))
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{
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$UserKnowsAboutPwdChange = true;
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}
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$message = lang('Your password is about to expire in %1 days, you may change your password now',round($daysLeftUntilChangeReq));
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// user has no rights to change password --> do NOT warn, as only forced check ignores rights
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if ($GLOBALS['egw']->acl->check('nopasswordchange', 1, 'preferences')) return true;
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return null;
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}
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return false;
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}
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return true;
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}
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/**
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* fetch the last pwd change for the user
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*
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* @param string $username username of account to authenticate
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* @return mixed false or shadowlastchange*24*3600
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*/
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function getLastPwdChange($username)
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{
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if (method_exists($this->backend,'getLastPwdChange'))
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{
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return $this->backend->getLastPwdChange($username);
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}
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return false;
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}
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/**
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* changes account_lastpwd_change in ldap datababse
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*
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* @param int $account_id account id of user whose passwd should be changed
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* @param string $passwd must be cleartext, usually not used, but may be used to authenticate as user to do the change -> ldap
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* @param int $lastpwdchange must be a unixtimestamp
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* @return boolean true if account_lastpwd_change successful changed, false otherwise
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*/
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function setLastPwdChange($account_id=0, $passwd=NULL, $lastpwdchange=NULL)
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{
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if (method_exists($this->backend,'setLastPwdChange'))
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{
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return $this->backend->setLastPwdChange($account_id, $passwd, $lastpwdchange);
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}
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return false;
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}
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/**
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* password authentication against password stored in sql datababse
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*
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* @param string $username username of account to authenticate
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* @param string $passwd corresponding password
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* @param string $passwd_type ='text' 'text' for cleartext passwords (default)
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* @return boolean true if successful authenticated, false otherwise
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*/
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function authenticate($username, $passwd, $passwd_type='text')
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{
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return $this->backend->authenticate($username, $passwd, $passwd_type);
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}
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/**
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* Calls crackcheck to enforce password strength (if configured) and changes password
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*
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* @param string $old_passwd must be cleartext
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* @param string $new_passwd must be cleartext
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* @param int $account_id account id of user whose passwd should be changed
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* @throws Exception\WrongUserinput if configured password strength is not meat
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* @throws Exception from backends having extra requirements
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* @return boolean true if password successful changed, false otherwise
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*/
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function change_password($old_passwd, $new_passwd, $account_id=0)
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{
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if (($err = self::crackcheck($new_passwd,null,null,null,$account_id)))
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{
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throw new Exception\WrongUserinput($err);
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}
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if (($ret = $this->backend->change_password($old_passwd, $new_passwd, $account_id)))
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{
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if ($account_id == $GLOBALS['egw']->session->account_id)
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{
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// need to change current users password in session
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Cache::setSession('phpgwapi', 'password', base64_encode($new_passwd));
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$GLOBALS['egw_info']['user']['passwd'] = $new_passwd;
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$GLOBALS['egw_info']['user']['account_lastpwd_change'] = DateTime::to('now','ts');
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// invalidate EGroupware session, as password is stored in egw_info in session
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Egw::invalidate_session_cache();
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}
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Accounts::cache_invalidate($account_id);
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self::changepwd($old_passwd, $new_passwd, $account_id);
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}
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return $ret;
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}
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/**
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* Call all changepwd hooks to re-encrypt mail credentials and let apps know about the change
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*
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* This method does not verification of the given passwords!
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* ´
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* @param string $old_passwd old password
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* @param string $new_passwd =null new password, default session password
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* @param int $account_id =null account_id, default current user
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*/
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static function changepwd($old_passwd, $new_passwd=null, $account_id=null)
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{
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if (!isset($account_id)) $account_id = $GLOBALS['egw']->session->account_id;
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if (!isset($new_passwd)) $new_passwd = $GLOBALS['egw']->session->passwd;
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// run changepwasswd hook
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$GLOBALS['hook_values'] = array(
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'account_id' => $account_id,
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'account_lid' => Accounts::id2name($account_id),
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'old_passwd' => $old_passwd,
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'new_passwd' => $new_passwd,
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);
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Hooks::process($GLOBALS['hook_values']+array(
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'location' => 'changepassword'
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),False,True); // called for every app now, not only enabled ones)
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}
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/**
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* return a random string of size $size either just alphanumeric or with special chars
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*
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* @param $size int-size of random string to return
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* @param $use_specialchars =false false: only letters and numbers, true: incl. special chars
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* @return string
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* @throws \Exception if it was not possible to gather sufficient entropy.
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*/
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static function randomstring($size, $use_specialchars=false)
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{
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$random_char = array(
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'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f',
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'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
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'w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L',
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'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
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);
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// we need special chars
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if ($use_specialchars)
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{
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$random_char = array_merge($random_char, str_split(str_replace('\\', '', self::SPECIALCHARS)), $random_char);
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}
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$s = '';
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for ($i=0; $i < $size; $i++)
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{
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$s .= $random_char[random_int(0, count($random_char)-1)];
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}
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return $s;
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}
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/**
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* encrypt password
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*
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* uses the encryption type set in setup and calls the appropriate encryption functions
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*
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* @param $password password to encrypt
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*/
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static function encrypt_password($password,$sql=False)
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{
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if($sql)
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{
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return self::encrypt_sql($password);
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}
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return self::encrypt_ldap($password);
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}
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/**
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* compares an encrypted password
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*
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* encryption type set in setup and calls the appropriate encryption functions
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*
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* @param string $cleartext cleartext password
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* @param string $encrypted encrypted password, can have a {hash} prefix, which overrides $type
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* @param string $type_in type of encryption
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* @param string $username used as optional key of encryption for md5_hmac
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* @param string &$type =null on return detected type of hash
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* @return boolean
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*/
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static function compare_password($cleartext, $encrypted, $type_in, $username='', &$type=null)
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{
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// allow to specify the hash type to prefix the hash, to easy migrate passwords from ldap
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$type = $type_in;
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$saved_enc = $encrypted;
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$matches = null;
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if (preg_match('/^\\{([a-z_5]+)\\}(.+)$/i',$encrypted,$matches))
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{
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$type = strtolower($matches[1]);
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$encrypted = $matches[2];
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switch($type) // some hashs are specially "packed" in ldap
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{
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case 'md5':
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$encrypted = implode('',unpack('H*',base64_decode($encrypted)));
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break;
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case 'plain':
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case 'crypt':
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// nothing to do
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break;
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default:
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$encrypted = $saved_enc;
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break;
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}
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}
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elseif($encrypted[0] == '$')
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{
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$type = 'crypt';
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}
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switch($type)
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{
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case 'plain':
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$ret = $cleartext === $encrypted;
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break;
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case 'smd5':
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$ret = self::smd5_compare($cleartext,$encrypted);
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break;
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case 'sha':
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$ret = self::sha_compare($cleartext,$encrypted);
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break;
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case 'ssha':
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$ret = self::ssha_compare($cleartext,$encrypted);
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break;
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case 'crypt':
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case 'des':
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case 'md5_crypt':
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case 'blowish_crypt': // was for some time a typo in setup
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case 'blowfish_crypt':
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case 'ext_crypt':
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case 'sha256_crypt':
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case 'sha512_crypt':
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$ret = self::crypt_compare($cleartext, $encrypted, $type);
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break;
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case 'md5_hmac':
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$ret = self::md5_hmac_compare($cleartext,$encrypted,$username);
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break;
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default:
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$type = 'md5';
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// fall through
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case 'md5':
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$ret = md5($cleartext) === $encrypted;
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break;
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}
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//error_log(__METHOD__."('$cleartext', '$encrypted', '$type_in', '$username') type='$type' returning ".array2string($ret));
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return $ret;
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}
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/**
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* Parameters used for crypt: const name, salt prefix, len of random salt, postfix
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*
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* @var array
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*/
|
||
static $crypt_params = array( //
|
||
'crypt' => array('CRYPT_STD_DES', '', 2, ''),
|
||
'ext_crypt' => array('CRYPT_EXT_DES', '_J9..', 4, ''),
|
||
'md5_crypt' => array('CRYPT_MD5', '$1$', 8, '$'),
|
||
//'old_blowfish_crypt' => array('CRYPT_BLOWFISH', '$2$', 13, ''), // old blowfish hash not in line with php.net docu, but could be in use
|
||
'blowfish_crypt' => array('CRYPT_BLOWFISH', '$2a$12$', 22, ''), // $2a$12$ = 2^12 = 4096 rounds
|
||
// password_hash($pwd, PASSWORD_BCRYPT) uses $2y$10$
|
||
'password_bcrypt' => array('CRYPT_BLOWFISH', '$2y$10$', 22, ''), // $2y$10$ = 2^10 = 1024 rounds
|
||
'sha256_crypt' => array('CRYPT_SHA256', '$5$', 16, '$'), // no "round=N$" --> default of 5000 rounds
|
||
'sha512_crypt' => array('CRYPT_SHA512', '$6$', 16, '$'), // no "round=N$" --> default of 5000 rounds
|
||
);
|
||
|
||
/**
|
||
* compare crypted passwords for authentication whether des,ext_des,md5, or blowfish crypt
|
||
*
|
||
* @param string $form_val user input value for comparison
|
||
* @param string $db_val stored value / hash (from database)
|
||
* @param string &$type detected crypt type on return
|
||
* @return boolean True on successful comparison
|
||
*/
|
||
static function crypt_compare($form_val, $db_val, &$type)
|
||
{
|
||
// detect type of hash by salt part of $db_val
|
||
list($first, $dollar, $salt, $salt2) = explode('$', $db_val);
|
||
foreach(self::$crypt_params as $type => $params)
|
||
{
|
||
list(,$prefix, $random, $postfix) = $params;
|
||
list(,$d) = explode('$', $prefix);
|
||
if ($dollar === $d || !$dollar && ($first[0] === $prefix[0] || $first[0] !== '_' && !$prefix))
|
||
{
|
||
$len = !$postfix ? strlen($prefix)+$random : strlen($prefix.$salt.$postfix);
|
||
// sha(256|512) might contain options, explicit $rounds=N$ prefix in salt
|
||
if (($type == 'sha256_crypt' || $type == 'sha512_crypt') && substr($salt, 0, 7) === 'rounds=')
|
||
{
|
||
$len += strlen($salt2)+1;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
$full_salt = substr($db_val, 0, $len);
|
||
$new_hash = crypt($form_val, $full_salt);
|
||
//error_log(__METHOD__."('$form_val', '$db_val') type=$type --> len=$len --> salt='$full_salt' --> new_hash='$new_hash' returning ".array2string($db_val === $new_hash));
|
||
|
||
return $db_val === $new_hash;
|
||
}
|
||
|
||
/**
|
||
* encrypt password for ldap
|
||
*
|
||
* uses the encryption type set in setup and calls the appropriate encryption functions
|
||
*
|
||
* @param string $password password to encrypt
|
||
* @param string $type =null default to $GLOBALS['egw_info']['server']['ldap_encryption_type']
|
||
* @return string
|
||
*/
|
||
static function encrypt_ldap($password, $type=null)
|
||
{
|
||
if (is_null($type)) $type = $GLOBALS['egw_info']['server']['ldap_encryption_type'];
|
||
|
||
$salt = '';
|
||
switch(strtolower($type))
|
||
{
|
||
default: // eg. setup >> config never saved
|
||
case 'des':
|
||
case 'blowish_crypt': // was for some time a typo in setup
|
||
$type = $type == 'blowish_crypt' ? 'blowfish_crypt' : 'crypt';
|
||
// fall through
|
||
case 'crypt':
|
||
case 'sha256_crypt':
|
||
case 'sha512_crypt':
|
||
case 'blowfish_crypt':
|
||
case 'md5_crypt':
|
||
case 'ext_crypt':
|
||
list($const, $prefix, $len, $postfix) = self::$crypt_params[$type];
|
||
if(defined($const) && constant($const) == 1)
|
||
{
|
||
$salt = $prefix.self::randomstring($len).$postfix;
|
||
$e_password = '{crypt}'.crypt($password, $salt);
|
||
break;
|
||
}
|
||
self::$error = 'no '.str_replace('_', ' ', $type);
|
||
$e_password = false;
|
||
break;
|
||
case 'md5':
|
||
/* New method taken from the openldap-software list as recommended by
|
||
* Kervin L. Pierre" <kervin@blueprint-tech.com>
|
||
*/
|
||
$e_password = '{md5}' . base64_encode(pack("H*",md5($password)));
|
||
break;
|
||
case 'smd5':
|
||
$salt = self::randomstring(16);
|
||
$hash = md5($password . $salt, true);
|
||
$e_password = '{SMD5}' . base64_encode($hash . $salt);
|
||
break;
|
||
case 'sha':
|
||
$e_password = '{SHA}' . base64_encode(sha1($password,true));
|
||
break;
|
||
case 'ssha':
|
||
$salt = self::randomstring(16);
|
||
$hash = sha1($password . $salt, true);
|
||
$e_password = '{SSHA}' . base64_encode($hash . $salt);
|
||
break;
|
||
case 'plain':
|
||
// if plain no type is prepended
|
||
$e_password = $password;
|
||
break;
|
||
}
|
||
//error_log(__METHOD__."('$password', ".array2string($type).") returning ".array2string($e_password).(self::$error ? ' error='.self::$error : ''));
|
||
return $e_password;
|
||
}
|
||
|
||
/**
|
||
* Create a password for storage in the accounts table
|
||
*
|
||
* @param string $password
|
||
* @param string $type =null default $GLOBALS['egw_info']['server']['sql_encryption_type'], if valid otherwise blowfish_crypt
|
||
* @return string hash
|
||
*/
|
||
static function encrypt_sql($password, $type=null)
|
||
{
|
||
/* Grab configured type, or default to md5() (old method) */
|
||
if (is_null($type))
|
||
{
|
||
$type = @$GLOBALS['egw_info']['server']['sql_encryption_type'] ?
|
||
strtolower($GLOBALS['egw_info']['server']['sql_encryption_type']) : 'md5';
|
||
}
|
||
switch($type)
|
||
{
|
||
case 'plain':
|
||
// since md5 is the default, type plain must be prepended, for eGroupware to understand
|
||
$e_password = '{PLAIN}'.$password;
|
||
break;
|
||
|
||
case 'md5':
|
||
/* This is the old standard for password storage in SQL */
|
||
$e_password = md5($password);
|
||
break;
|
||
|
||
|
||
default:
|
||
$type = 'blowfish_crypt';
|
||
// fall throught
|
||
// all other types are identical to ldap, so no need to doublicate the code here
|
||
case 'des':
|
||
case 'crypt':
|
||
case 'sha256_crypt':
|
||
case 'sha512_crypt':
|
||
case 'blowfish_crypt':
|
||
case 'md5_crypt':
|
||
case 'ext_crypt':
|
||
case 'smd5':
|
||
case 'sha':
|
||
case 'ssha':
|
||
$e_password = self::encrypt_ldap($password, $type);
|
||
break;
|
||
}
|
||
//error_log(__METHOD__."('$password') using '$type' returning ".array2string($e_password).(self::$error ? ' error='.self::$error : ''));
|
||
return $e_password;
|
||
}
|
||
|
||
/**
|
||
* Get available password hashes sorted by securest first
|
||
*
|
||
* @param string &$securest =null on return securest available hash
|
||
* @return array hash => label
|
||
*/
|
||
public static function passwdhashes(&$securest=null)
|
||
{
|
||
$hashes = array();
|
||
|
||
/* Check for available crypt methods based on what is defined by php */
|
||
if(defined('CRYPT_BLOWFISH') && CRYPT_BLOWFISH == 1)
|
||
{
|
||
$hashes['blowfish_crypt'] = 'blowfish_crypt';
|
||
}
|
||
if(defined('CRYPT_SHA512') && CRYPT_SHA512 == 1)
|
||
{
|
||
$hashes['sha512_crypt'] = 'sha512_crypt';
|
||
}
|
||
if(defined('CRYPT_SHA256') && CRYPT_SHA256 == 1)
|
||
{
|
||
$hashes['sha256_crypt'] = 'sha256_crypt';
|
||
}
|
||
if(defined('CRYPT_MD5') && CRYPT_MD5 == 1)
|
||
{
|
||
$hashes['md5_crypt'] = 'md5_crypt';
|
||
}
|
||
if(defined('CRYPT_EXT_DES') && CRYPT_EXT_DES == 1)
|
||
{
|
||
$hashes['ext_crypt'] = 'ext_crypt';
|
||
}
|
||
$hashes += array(
|
||
'ssha' => 'ssha',
|
||
'smd5' => 'smd5',
|
||
'sha' => 'sha',
|
||
);
|
||
if(@defined('CRYPT_STD_DES') && CRYPT_STD_DES == 1)
|
||
{
|
||
$hashes['crypt'] = 'crypt';
|
||
}
|
||
|
||
$hashes += array(
|
||
'md5' => 'md5',
|
||
'plain' => 'plain',
|
||
);
|
||
|
||
// mark the securest algorithm for the user
|
||
$securest = key($hashes);
|
||
$hashes[$securest] .= ' ('.lang('securest').')';
|
||
|
||
return $hashes;
|
||
}
|
||
|
||
/**
|
||
* Checks if a given password is "safe"
|
||
*
|
||
* @link http://technet.microsoft.com/en-us/library/cc786468(v=ws.10).aspx
|
||
* In contrary to whats documented in above link, windows seems to treet numbers as delimiters too.
|
||
*
|
||
* Windows compatible check is $reqstrength=3, $minlength=7, $forbid_name=true
|
||
*
|
||
* @param string $passwd
|
||
* @param int $reqstrength =null defaults to whatever set in config for "force_pwd_strength"
|
||
* @param int $minlength =null defaults to whatever set in config for "check_save_passwd"
|
||
* @param string $forbid_name =null if "yes" username or full-name split by delimiters AND longer then 3 chars are
|
||
* forbidden to be included in password, default to whatever set in config for "passwd_forbid_name"
|
||
* @param array|int $account =null array with account_lid and account_fullname or account_id for $forbid_name check
|
||
* @return mixed false if password is considered "safe" (or no requirements) or a string $message if "unsafe"
|
||
*/
|
||
static function crackcheck($passwd, $reqstrength=null, $minlength=null, $forbid_name=null, $account=null)
|
||
{
|
||
if (!isset($reqstrength)) $reqstrength = $GLOBALS['egw_info']['server']['force_pwd_strength'];
|
||
if (!isset($minlength)) $minlength = $GLOBALS['egw_info']['server']['force_pwd_length'];
|
||
if (!isset($forbid_name)) $forbid_name = $GLOBALS['egw_info']['server']['passwd_forbid_name'];
|
||
|
||
// load preferences translations, as changepassword get's called from admin too
|
||
Translation::add_app('preferences');
|
||
|
||
// check for and if necessary convert old values True and 5 to new separate values for length and char-classes
|
||
if ($GLOBALS['egw_info']['server']['check_save_passwd'] || $reqstrength == 5)
|
||
{
|
||
if (!isset($reqstrength) || $reqstrength == 5)
|
||
{
|
||
Config::save_value('force_pwd_strength', $reqstrength=4, 'phpgwapi');
|
||
}
|
||
if (!isset($minlength))
|
||
{
|
||
Config::save_value('force_pwd_length', $minlength=7, 'phpgwapi');
|
||
}
|
||
Config::save_value('check_save_passwd', null, 'phpgwapi');
|
||
}
|
||
|
||
$errors = array();
|
||
|
||
if ($minlength && strlen($passwd) < $minlength)
|
||
{
|
||
$errors[] = lang('password must have at least %1 characters', $minlength);
|
||
}
|
||
|
||
if ($forbid_name === 'yes')
|
||
{
|
||
if (!$account || !is_array($account) && !($account = $GLOBALS['egw']->accounts->read($account)))
|
||
{
|
||
throw new Exception\WrongParameter('crackcheck(..., forbid_name=true, account) requires account-data!');
|
||
}
|
||
$parts = preg_split("/[,._ \t0-9-]+/", $account['account_fullname'].','.$account['account_lid']);
|
||
foreach($parts as $part)
|
||
{
|
||
if (strlen($part) > 2 && stripos($passwd, $part) !== false)
|
||
{
|
||
$errors[] = lang('password contains with "%1" a parts of your user- or full-name (3 or more characters long)', $part);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if ($reqstrength)
|
||
{
|
||
$missing = array();
|
||
if (!preg_match('/(.*\d.*){'. ($non=1). ',}/',$passwd))
|
||
{
|
||
$missing[] = lang('numbers');
|
||
}
|
||
if (!preg_match('/(.*[[:upper:]].*){'. ($nou=1). ',}/',$passwd))
|
||
{
|
||
$missing[] = lang('uppercase letters');
|
||
}
|
||
if (!preg_match('/(.*[[:lower:]].*){'. ($nol=1). ',}/',$passwd))
|
||
{
|
||
$missing[] = lang('lowercase letters');
|
||
}
|
||
if (!preg_match('/['.preg_quote(self::SPECIALCHARS, '/').']/', $passwd))
|
||
{
|
||
$missing[] = lang('special characters');
|
||
}
|
||
if (4 - count($missing) < $reqstrength)
|
||
{
|
||
$errors[] = lang('password contains only %1 of required %2 character classes: no %3',
|
||
4-count($missing), $reqstrength, implode(', ', $missing));
|
||
}
|
||
}
|
||
if ($errors)
|
||
{
|
||
return lang('Your password does not have required strength:').
|
||
"<br/>\n- ".implode("<br/>\n- ", $errors);
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* compare SMD5-encrypted passwords for authentication
|
||
*
|
||
* @param string $form_val user input value for comparison
|
||
* @param string $db_val stored value (from database)
|
||
* @return boolean True on successful comparison
|
||
*/
|
||
static function smd5_compare($form_val,$db_val)
|
||
{
|
||
/* Start with the first char after {SMD5} */
|
||
$hash = base64_decode(substr($db_val,6));
|
||
|
||
/* SMD5 hashes are 16 bytes long */
|
||
$orig_hash = cut_bytes($hash, 0, 16); // binary string need to use cut_bytes, not mb_substr(,,'utf-8')!
|
||
$salt = cut_bytes($hash, 16);
|
||
|
||
$new_hash = md5($form_val . $salt,true);
|
||
//echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash);
|
||
|
||
return strcmp($orig_hash,$new_hash) == 0;
|
||
}
|
||
|
||
/**
|
||
* compare SHA-encrypted passwords for authentication
|
||
*
|
||
* @param string $form_val user input value for comparison
|
||
* @param string $db_val stored value (from database)
|
||
* @return boolean True on successful comparison
|
||
*/
|
||
static function sha_compare($form_val,$db_val)
|
||
{
|
||
/* Start with the first char after {SHA} */
|
||
$hash = base64_decode(substr($db_val,5));
|
||
$new_hash = sha1($form_val,true);
|
||
//echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash);
|
||
|
||
return strcmp($hash,$new_hash) == 0;
|
||
}
|
||
|
||
/**
|
||
* compare SSHA-encrypted passwords for authentication
|
||
*
|
||
* @param string $form_val user input value for comparison
|
||
* @param string $db_val stored value (from database)
|
||
* @return boolean True on successful comparison
|
||
*/
|
||
static function ssha_compare($form_val,$db_val)
|
||
{
|
||
/* Start with the first char after {SSHA} */
|
||
$hash = base64_decode(substr($db_val, 6));
|
||
|
||
// SHA-1 hashes are 160 bits long
|
||
$orig_hash = cut_bytes($hash, 0, 20); // binary string need to use cut_bytes, not mb_substr(,,'utf-8')!
|
||
$salt = cut_bytes($hash, 20);
|
||
$new_hash = sha1($form_val . $salt,true);
|
||
|
||
//error_log(__METHOD__."('$form_val', '$db_val') hash='$hash', orig_hash='$orig_hash', salt='$salt', new_hash='$new_hash' returning ".array2string(strcmp($orig_hash,$new_hash) == 0));
|
||
return strcmp($orig_hash,$new_hash) == 0;
|
||
}
|
||
|
||
/**
|
||
* compare md5_hmac-encrypted passwords for authentication (see RFC2104)
|
||
*
|
||
* @param string $form_val user input value for comparison
|
||
* @param string $db_val stored value (from database)
|
||
* @param string $_key key for md5_hmac-encryption (username for imported smf users)
|
||
* @return boolean True on successful comparison
|
||
*/
|
||
static function md5_hmac_compare($form_val,$db_val,$_key)
|
||
{
|
||
$key = str_pad(strlen($_key) <= 64 ? $_key : pack('H*', md5($_key)), 64, chr(0x00));
|
||
$md5_hmac = md5(($key ^ str_repeat(chr(0x5c), 64)) . pack('H*', md5(($key ^ str_repeat(chr(0x36), 64)). $form_val)));
|
||
|
||
return strcmp($md5_hmac,$db_val) == 0;
|
||
}
|
||
}
|