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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Superclass for plugins that do authentication and/or authorization
*
* 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>
* @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);
}
/**
* Superclass for plugins that do authentication
*
* @category Plugin
* @package StatusNet
* @author Craig Andrews <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/
*/
abstract class AuthPlugin extends Plugin
{
//is this plugin authoritative for authentication?
public $authn_authoritative = false;
//should accounts be automatically created after a successful login attempt?
public $autoregistration = false;
//can the user change their email address
public $email_changeable=true;
//can the user change their email address
public $password_changeable=true;
//------------Auth plugin should implement some (or all) of these methods------------\\
/**
* Check if a nickname/password combination is valid
* @param nickname
* @param password
* @return boolean true if the credentials are valid, false if they are invalid.
*/
function checkPassword($nickname, $password)
{
return false;
}
/**
* Automatically register a user when they attempt to login with valid credentials.
* User::register($data) is a very useful method for this implementation
* @param nickname
* @return boolean true if the user was created, false if autoregistration is not allowed, null if this plugin is not responsible for this nickname
*/
function autoRegister($nickname)
{
return null;
}
/**
* Change a user's password
* The old password has been verified to be valid by this plugin before this call is made
* @param nickname
* @param oldpassword
* @param newpassword
* @return boolean true if the password was changed, false if password changing failed for some reason, null if this plugin is not responsible for this nickname
*/
function changePassword($nickname,$oldpassword,$newpassword)
{
return null;
}
/**
* Can a user change this field in his own profile?
* @param nickname
* @param field
* @return boolean true if the field can be changed, false if not allowed to change it, null if this plugin is not responsible for this nickname
*/
function canUserChangeField($nickname, $field)
{
return null;
}
//------------Below are the methods that connect StatusNet to the implementing Auth plugin------------\\
function __construct()
{
parent::__construct();
}
function StartCheckPassword($nickname, $password, &$authenticatedUser){
if($this->password_changeable){
$authenticated = $this->checkPassword($nickname, $password);
if($authenticated){
$authenticatedUser = User::staticGet('nickname', $nickname);
if(!$authenticatedUser && $this->autoregistration){
if($this->autoregister($nickname)){
$authenticatedUser = User::staticGet('nickname', $nickname);
}
}
return false;
}else{
if($this->authn_authoritative){
return false;
}
}
//we're not authoritative, so let other handlers try
}else{
if($this->authn_authoritative){
//since we're authoritative, no other plugin could do this
throw new Exception(_('Password changing is not allowed'));
}
}
}
function onStartChangePassword($nickname,$oldpassword,$newpassword)
{
if($this->password_changeable){
$authenticated = $this->checkPassword($nickname, $oldpassword);
if($authenticated){
$result = $this->changePassword($nickname,$oldpassword,$newpassword);
if($result){
//stop handling of other handlers, because what was requested was done
return false;
}else{
throw new Exception(_('Password changing failed'));
}
}else{
if($this->authn_authoritative){
//since we're authoritative, no other plugin could do this
throw new Exception(_('Password changing failed'));
}else{
//let another handler try
return null;
}
}
}else{
if($this->authn_authoritative){
//since we're authoritative, no other plugin could do this
throw new Exception(_('Password changing is not allowed'));
}
}
}
function onStartAccountSettingsPasswordMenuItem($widget)
{
if($this->authn_authoritative && !$this->password_changeable){
//since we're authoritative, no other plugin could change passwords, so do render the menu item
return false;
}
}
}
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