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Changed to Evan's event style and added an AuthPlugin superclass

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This commit is contained in:
Craig Andrews 2009-11-10 16:27:20 -05:00
parent 651cbf0681
commit 1cd6650ae4
6 changed files with 282 additions and 166 deletions
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6
EVENTS.txt
View File

@ -491,11 +491,13 @@ EndCheckPassword: After checking a username/password pair
- $password: The password that was checked
- $authenticatedUser: User object if credentials match a user, else null.
ChangePassword: Handle a password change request
StartChangePassword: Before changing a password
- $nickname: user's nickname
- $oldpassword: the user's old password
- $newpassword: the desired new password
- &$errormsg: set this to an error message if the password could not be changed. If the password was changed, leave this as false
EndChangePassword: After changing a password
- $nickname: user's nickname
CanUserChangeField: Determines if a user is allowed to change a specific profile field
- $nickname: nickname of the user who would like to know which of their profile fields are mutable

23
actions/passwordsettings.php
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@ -58,19 +58,6 @@ class PasswordsettingsAction extends AccountSettingsAction
return _('Change password');
}
function prepare($args){
parent::prepare($args);
$user = common_current_user();
Event::handle('CanUserChangeField', array($user->nickname, 'password'));
if(! $fields['password']){
//user is not allowed to change his password
$this->clientError(_('You are not allowed to change your password'));
}
}
/**
* Instructions for use
*
@ -182,8 +169,8 @@ class PasswordsettingsAction extends AccountSettingsAction
$oldpassword = null;
}
$errormsg = false;
if(! Event::handle('ChangePassword', array($user->nickname, $oldpassword, $newpassword, &$errormsg))){
$success = false;
if(! Event::handle('StartChangePassword', array($user->nickname, $oldpassword, $newpassword))){
//no handler changed the password, so change the password internally
$original = clone($user);
@ -199,11 +186,9 @@ class PasswordsettingsAction extends AccountSettingsAction
$this->serverError(_('Can\'t save new password.'));
return;
}
Event::handle('EndChangePassword', array($nickname));
}
if($errormsg === false)
$this->showForm(_('Password saved.'), true);
else
$this->showForm($errormsg);
$this->showForm(_('Password saved.'), true);
}
}

145
plugins/Auth/AuthPlugin.php Normal file
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@ -0,0 +1,145 @@
<?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?
protected $authn_authoritative = false;
//should accounts be automatically created after a successful login attempt?
protected $autoregistration = false;
//------------Auth plugin should implement some (or all) of these methods------------\\
/**
* Check if a nickname/password combination is valid
* @param nickname
* @param password
* @return boolean true if the credentials are valid, false if they are invalid.
*/
function checkPassword($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){
$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
}
function onStartChangePassword($nickname,$oldpassword,$newpassword)
{
$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;
}
}
}
}

114
plugins/Ldap/LdapPlugin.php
View File

@ -31,38 +31,42 @@ if (!defined('STATUSNET') && !defined('LACONICA')) {
exit(1);
}
require_once INSTALLDIR.'/plugins/Ldap/ldap.php';
require_once INSTALLDIR.'/plugins/Auth/AuthPlugin.php';
require_once 'Net/LDAP2.php';
class LdapPlugin extends Plugin
class LdapPlugin extends AuthPlugin
{
private $config = array();
function __construct()
{
parent::__construct();
}
//---interface implementation---//
function onCheckPassword($nickname, $password, &$authenticated)
function checkPassword($nickname, $password)
{
if(ldap_check_password($nickname, $password)){
$authenticated = true;
//stop handling of other events, because we have an answer
$ldap = $this->ldap_get_connection();
if(!$ldap){
return false;
}
if(common_config('ldap','authoritative')){
//a false return stops handler processing
$entry = $this->ldap_get_user($nickname);
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 onAutoRegister($nickname)
function autoRegister($nickname)
{
$user = User::staticGet('nickname', $nickname);
if (! is_null($user) && $user !== false) {
common_log(LOG_WARNING, "An attempt was made to autoregister an existing user with nickname: $nickname");
return;
}
$attributes=array();
$config_attributes = array('nickname','email','fullname','homepage','location');
foreach($config_attributes as $config_attribute){
@ -71,7 +75,7 @@ class LdapPlugin extends Plugin
array_push($attributes,$value);
}
}
$entry = ldap_get_user($nickname,$attributes);
$entry = $this->ldap_get_user($nickname,$attributes);
if($entry){
$registration_data = array();
foreach($config_attributes as $config_attribute){
@ -89,21 +93,22 @@ class LdapPlugin extends Plugin
//set the database saved password to a random string.
$registration_data['password']=common_good_rand(16);
$user = User::register($registration_data);
//prevent other handlers from running, as we have registered the user
return false;
return true;
}else{
//user isn't in ldap, so we cannot register him
return null;
}
}
function onChangePassword($nickname,$oldpassword,$newpassword,&$errormsg)
function changePassword($nickname,$oldpassword,$newpassword)
{
//TODO implement this
$errormsg = _('Sorry, changing LDAP passwords is not supported at this time');
throw new Exception(_('Sorry, changing LDAP passwords is not supported at this time'));
//return false, indicating that the event has been handled
return false;
}
function onCanUserChangeField($nickname, $field)
function canUserChangeField($nickname, $field)
{
switch($field)
{
@ -113,4 +118,67 @@ class LdapPlugin extends Plugin
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!==false){
$config[$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 = $this->ldap_get_connection();
$filter = Net_LDAP2_Filter::create(common_config('ldap','nickname_attribute'), '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;
}
}
}

52
plugins/Ldap/README
View File

@ -2,22 +2,46 @@ The LDAP plugin allows for StatusNet to handle authentication, authorization, an
Installation
============
Add configuration entries to config.php. These entries are:
add "addPlugin('ldap', array('setting'=>'value', 'setting2'=>'value2', ...);" to the bottom of your config.php
The following are documented at http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
$config['ldap']['binddn']
$config['ldap']['bindpw']
$config['ldap']['basedn']
$config['ldap']['host']
$config['ldap']['nickname_attribute'] Set this to the name of the ldap attribute that holds the username. For example, on Microsoft's Active Directory, this should be set to 'sAMAccountName'
$config['ldap']['nickname_email'] Set this to the name of the ldap attribute that holds the user's email address. For example, on Microsoft's Active Directory, this should be set to 'mail'
$config['ldap']['nickname_fullname'] Set this to the name of the ldap attribute that holds the user's full name. For example, on Microsoft's Active Directory, this should be set to 'displayName'
$config['ldap']['nickname_homepage'] Set this to the name of the ldap attribute that holds the the url of the user's home page.
$config['ldap']['nickname_location'] Set this to the name of the ldap attribute that holds the user's location.
$config['ldap']['authoritative'] Set to true if LDAP's responses are authoritative (meaning if LDAP fails, do check the any other plugins or the internal password database)
$config['ldap']['autoregister'] Set to true if users should be automatically created when they attempt to login
Settings
========
authn_authoritative: Set to true if LDAP's responses are authoritative (meaning if LDAP fails, do check the any other plugins or the internal password database).
autoregistration: Set to true if users should be automatically created when they attempt to login.
Finally, add "addPlugin('ldap');" to the bottom of your config.php
host*: LDAP server name to connect to. You can provide several hosts in an array in which case the hosts are tried from left to right.. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
port: Port on the server. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
version: LDAP version. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
starttls: TLS is started after connecting. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
binddn: The distinguished name to bind as (username). See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
bindpw: Password for the binddn. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
basedn*: LDAP base name (root directory). See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
options: See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
filter: Default search filter. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
scope: Default search scope. See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
attributes: an array with the key being the StatusNet user attribute name, and the value the LDAP attribute name
nickname*
email
fullname
homepage
location
* required
Example
=======
Here's an example of an LDAP plugin configuration that connects to Microsoft Active Directory.
addPlugin('ldap', array(
'binddn'=>'username',
'bindpw'=>'password',
'basedn'=>'OU=Users,OU=StatusNet,OU=US,DC=americas,DC=global,DC=loc',
'host'=>array('server1', 'server2'),
'attributes'=>array(
'nickname'=>'sAMAccountName',
'email'=>'mail',
'fullname'=>'displayName')
));

108
plugins/Ldap/ldap.php
View File

@ -1,108 +0,0 @@
<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* 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/>.
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
require_once 'Net/LDAP2.php';
function ldap_get_config(){
static $config = null;
if($config == null){
$config = array();
$keys = array('host','port','version','starttls','binddn','bindpw','basedn','options','scope');
foreach($keys as $key){
$value = common_config('ldap', $key);
if($value!==false){
$config[$key]=$value;
}
}
}
return $config;
}
function ldap_get_connection($config = null){
if($config == null){
$config = 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 $ldap;
}
function ldap_check_password($username, $password){
$ldap = ldap_get_connection();
if(!$ldap){
return false;
}
$entry = ldap_get_user($username);
if(!$entry){
return false;
}else{
$config = ldap_get_config();
$config['binddn']=$entry->dn();
$config['bindpw']=$password;
if(ldap_get_connection($config)){
return true;
}else{
return false;
}
}
}
/**
* get an LDAP entry for a user with a given username
*
* @param string $username
* $param array $attributes LDAP attributes to retrieve
* @return string DN
*/
function ldap_get_user($username,$attributes=array()){
$ldap = ldap_get_connection();
$filter = Net_LDAP2_Filter::create(common_config('ldap','nickname_attribute'), '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;
}
}