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chamilo-lms
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Moved SSO code to separate class

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skala
Yannick Warnier 14 years ago
parent fc16c425e7
commit a59fd27a2f
2 changed files with 222 additions and 148 deletions
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  1. 207
      main/auth/sso/sso.class.php
  2. 163
      main/inc/local.inc.php

207
main/auth/sso/sso.class.php
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@ -0,0 +1,207 @@
<?php
/**
* This file contains the necessary elements to implement a Single Sign On
* mechanism with an arbitrary external web application (given some light
* development there) and is based on the Drupal-Chamilo module implementation.
* To develop a new authentication mechanism, please extend this class and
* overwrite its method, then modify the corresponding calling code in
* main/inc/local.inc.php
*/
/**
* The SSO class allows for management or remote Single Sign On resources
*/
public class sso {
public var $protocol; // 'http://',
public var $domain; // 'localhost/project/drupal5',
public var $auth_uri; // '/?q=user',
public var $deauth_uri; // '/?q=logout',
public var $referer; // http://my.chamilo.com/main/auth/profile.php
/**
* Instanciates the object, initializing all relevant URL strings
*/
public function __construct() {
$this->protocol = api_get_setting('sso_authentication_protocol');
$this->domain = api_get_setting('sso_authentication_domain');
$this->auth_uri = api_get_setting('sso_authentication_auth_uri');
$this->deauth_uri = api_get_setting('sso_authentication_unauth_uri');
$this->referer = $this->protocol.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$this->deauth_url = $this->protocol.$this->domain.$this->deauth_uri;
$this->master_url = $this->protocol.$this->domain.$this->auth_uri;
$this->target = api_get_path(WEB_PATH);
}
/**
* Unlogs the user from the remote server
*/
public function logout() {
header('Location: '.$this->deauth_url);
exit;
}
/**
* Sends the user to the master URL for a check of active connection
*/
public function ask_master() {
header('Location: '.$this->master_url.'&sso_referer='.urlencode($this->referer).'&sso_target='.urlencode($this->target));
exit;
}
/**
* Validates the received active connection data with the database
* @return bool Return the loginFailed variable value to local.inc.php
*/
public function check_user() {
global $_user, $userPasswordCrypted, $_configuration;
$loginFailed = false;
//change the way we recover the cookie depending on how it is formed
$sso = $this->decode_cookie($_GET['sso_cookie']);
//lookup the user in the main database
$user_table = Database::get_main_table(TABLE_MAIN_USER);
$sql = "SELECT user_id, username, password,
auth_source, active, expiration_date
FROM $user_table
WHERE username = '".trim(addslashes($sso['username']))."'";
$result = Database::query($sql);
if (Database::num_rows($result) > 0) {
$uData = Database::fetch_array($result);
//Check the user's password
if ($uData['auth_source'] == PLATFORM_AUTH_SOURCE) {
// Make sure password is encrypted with md5
if (!$userPasswordCrypted) {
$uData['password'] = md5($uData['password']);
}
//the authentification of this user is managed by Chamilo itself
// check the user's password
// password hash comes into a sha1
if ($sso['secret'] === sha1($uData['password'])
&& ($sso['username'] == $uData['username'])) {
//Check if the account is active (not locked)
if ($uData['active']=='1') {
// check if the expiration date has not been reached
if ($uData['expiration_date'] > date('Y-m-d H:i:s')
OR $uData['expiration_date']=='0000-00-00 00:00:00') {
//If Multiple URL is enabled
if ($_configuration['multiple_access_urls']) {
$admin_table = Database::get_main_table(TABLE_MAIN_ADMIN);
//Check if user is an admin
$sql = "SELECT user_id FROM $admin_table
WHERE user_id = '".trim(addslashes($uData['user_id']))."' LIMIT 1";
$result = Database::query($sql);
$my_user_is_admin = false;
if (Database::num_rows($result) > 0) {
$my_user_is_admin = true;
}
//Check the access_url configuration setting if
// the user is registered in the
// access_url_rel_user table
//Getting the current access_url_id
// of the platform
$current_access_url_id = api_get_current_access_url_id();
// my user is subscribed in these
//sites: $my_url_list
$my_url_list = api_get_access_url_from_user($uData['user_id']);
if ($my_user_is_admin === false) {
if (is_array($my_url_list) && count($my_url_list)>0 ) {
if (in_array($current_access_url_id, $my_url_list)) {
// the user has permission to enter at this site
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
// Redirect to homepage
$sso_target = isset($sso['target']) ? $sso['target'] : api_get_path(WEB_PATH) .'.index.php';
header('Location: '. $sso_target);
exit;
} else {
// user does not have permission for this site
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
} else {
// there is no URL in the multiple
// urls list for this user
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
} else {
//Only admins of the "main" (first) Chamilo
// portal can login wherever they want
if (in_array(1, $my_url_list)) {
//Check if this admin is admin on the
// principal portal
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
} else {
//Secondary URL admin wants to login
// so we check as a normal user
if (in_array($current_access_url_id, $my_url_list)) {
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
} else {
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
}
}
} else {
//Single URL access (Only 1 portal)
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
// Redirect to homepage
$sso_target = isset($sso['target']) ? $sso['target'] : api_get_path(WEB_PATH) .'.index.php';
header('Location: '. $sso_target);
exit;
}
} else {
// user account expired
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_expired');
exit;
}
} else {
//User not active
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
} else {
//SHA1 of password is wrong
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=wrong_password');
exit;
}
} else {
//Auth_source is wrong
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=wrong_authentication_source');
exit;
}
} else {
//No user by that login
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=user_not_found');
exit;
}
return $loginFailed;
}
/**
* Decode the cookie (this function may vary depending on the
* Single Sign On implementation
* @param string Encoded cookie
* @result array Parsed and unencoded cookie
*/
private function decode_cookie($cookie) {
return unserialize(base64_decode($cookie));
}
}

163
main/inc/local.inc.php
Unescape View File

@ -425,17 +425,17 @@ if (!empty($_SESSION['_user']['user_id']) && ! ($login || $logout)) {
} elseif (api_get_setting('sso_authentication')==='true' && !in_array('webservices', explode('/', $_SERVER['REQUEST_URI']))) {
/**
* TODO:
* - Implement user interface for api_get_setting('sso_authentication')
* } elseif (api_get_setting('sso_authentication')=='true') {
* - Work on a better validation for webservices paths. Current is very poor and exit
*/
$master = array(
'domain' => api_get_setting('sso_authentication_domain'), // 'localhost/project/drupal5',
'auth_uri' => api_get_setting('sso_authentication_auth_uri'), // '/?q=user',
'deauth_uri' => api_get_setting('sso_authentication_unauth_uri'), // '/?q=logout',
'protocol' => api_get_setting('sso_authentication_protocol') // 'http://',
);
$referer = $master['protocol'] . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$subsso = api_get_setting('sso_authentication_subclass');
require_once(api_get_path(SYS_CODE_PATH).'auth/sso/sso.class.php');
if (!empty($subsso)) {
require_once(api_get_path(SYS_CODE_PATH).'auth/sso/sso.'.$subsso.'.class.php');
$subsso = 'sso'.$subsso;
$osso = new $subsso(); //load the subclass
} else {
$osso = new sso();
}
if (isset($_SESSION['_user']['user_id'])) {
if ($logout) {
// Library needed by index.php
@ -446,156 +446,23 @@ if (!empty($_SESSION['_user']['user_id']) && ! ($login || $logout)) {
$logout_no_redirect = TRUE;
// Make custom redirect after logout
online_logout();
header('Location: '. $master['protocol'] . $master['domain'] . $master['deauth_uri']);
exit;
$osso->logout(); //redirects and exits
}
} elseif(!$logout) {
$master_url = $master['domain'] . $master['auth_uri'];
// Handle cookie comming from Master Server
if (!isset($_GET['sso_referer']) && !isset($_GET['loginFailed'])) {
// Target to redirect after success SSO
$target = api_get_path(WEB_PATH);
// Redirect to master server
header('Location: ' . $master['protocol'] . $master_url . '&sso_referer=' . urlencode($referer) . '&sso_target=' . urlencode($target));
exit;
$osso->ask_master();
} elseif (isset($_GET['sso_cookie'])) {
if (isset($_GET['sso_referer']) ? $_GET['sso_referer'] === $master['protocol']. $master_url : FALSE) {
$sso = unserialize(base64_decode($_GET['sso_cookie']));
//lookup the user in the main database
$user_table = Database::get_main_table(TABLE_MAIN_USER);
$sql = "SELECT user_id, username, password, auth_source, active, expiration_date
FROM $user_table
WHERE username = '".trim(addslashes($sso['username']))."'";
$result = Database::query($sql);
if (Database::num_rows($result) > 0) {
$uData = Database::fetch_array($result);
//Check the user's password
if ($uData['auth_source'] == PLATFORM_AUTH_SOURCE) {
// Make sure password is encrypted with md5
if (!$userPasswordCrypted) {
$uData['password'] = md5($uData['password']);
}
//the authentification of this user is managed by Chamilo itself// check the user's password
// password hash comes into a sha1
if ($sso['secret'] === sha1($uData['password']) && ($sso['username'] == $uData['username'])) {
//Check if the account is active (not locked)
if ($uData['active']=='1') {
// check if the expiration date has not been reached
if ($uData['expiration_date']>date('Y-m-d H:i:s') OR $uData['expiration_date']=='0000-00-00 00:00:00') {
global $_configuration;
//If Multiple URL is enabled
if ($_configuration['multiple_access_urls']) {
$admin_table = Database::get_main_table(TABLE_MAIN_ADMIN);
//Check if user is an admin
$sql = "SELECT user_id FROM $admin_table
WHERE user_id = '".trim(addslashes($uData['user_id']))."' LIMIT 1";
$result = Database::query($sql);
$my_user_is_admin = false;
if (Database::num_rows($result) > 0) {
$my_user_is_admin = true;
}
//Check the access_url configuration setting if the user is registered in the access_url_rel_user table
//Getting the current access_url_id of the platform
$current_access_url_id = api_get_current_access_url_id();
// my user is subscribed in these sites => $my_url_list
$my_url_list = api_get_access_url_from_user($uData['user_id']);
if ($my_user_is_admin === false) {
if (is_array($my_url_list) && count($my_url_list)>0 ) {
if (in_array($current_access_url_id, $my_url_list)) {
// the user has permission to enter at this site
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
// Redirect to homepage
$sso_target = isset($sso['target']) ? $sso['target'] : api_get_path(WEB_PATH) .'.index.php';
header('Location: '. $sso_target);
} else {
// user does not have permission for this site
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
} else {
// there is no URL in the multiple urls list for this user
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
} else { //Only admins of the "main" (first) Chamilo portal can login wherever they want
if (in_array(1, $my_url_list)) { //Check if this admin have the access_url_id = 1 which means the principal portal
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
} else {
//This means a secondary admin wants to login so we check as a normal user
if (in_array($current_access_url_id, $my_url_list)) {
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
} else {
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
}
}
} else {
//Single URL access (Only 1 portal)
$_user['user_id'] = $uData['user_id'];
api_session_register('_user');
event_login();
// Redirect to homepage
$sso_target = isset($sso['target']) ? $sso['target'] : api_get_path(WEB_PATH) .'.index.php';
header('Location: '. $sso_target);
}
} else {
// user account expired
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_expired');
exit;
}
} else {
//User not active
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
} else {
//SHA1 of password is wrong
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
} else {
//Auth_source is wrong
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
} else {
//No user by that login
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
//make all the process of checking
//if the user exists (delegated to the sso class)
$osso->check_user();
} else {
//Request comes from unknown source
$loginFailed = true;
api_session_unregister('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=unrecognize_sso_origin');
exit;
}
}

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