Current File : //proc/self/root/home/tjamichg/cursos.tjamich.gob.mx/main/auth/sso/sso.Drupal.class.php
<?php
/* For licensing terms, see /license.txt */
use ChamiloSession as Session;
/**
* This file contains the necessary elements to implement a Single Sign On
* mechanism with an external Drupal application (on which the Chamilo module
* 7.x-1.0-alpha3 or above must be implemented).
*
* To use this class, set variable "sso_authentication_subclass" to "Drupal"
* in Chamilo settings. If not yet available in the "Security" tab, execute the
* following on the Chamilo database:
* INSERT INTO `settings_current` (`variable`, `type`, `category`, `selected_value`, `title`, `comment`, `access_url`)
* VALUES ('sso_authentication_subclass', 'textfield', 'Security', 'Drupal', 'SSOSubclass', 'SSOSubclassComment', 1);
*
* @package chamilo.auth.sso
*/
/**
* The SSO class allows for management of remote Single Sign On resources.
*/
class ssoDrupal
{
public $protocol; // 'http://',
public $domain; // 'localhost/project/drupal',
public $auth_uri; // '/?q=user',
public $deauth_uri; // '/?q=logout',
public $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');
// There can be multiple domains, so make sure to take only the first
// This might be later extended with a decision process
$domains = preg_split('/,/', api_get_setting('sso_authentication_domain'));
$this->domain = trim($domains[0]);
$this->auth_uri = api_get_setting('sso_authentication_auth_uri');
$this->deauth_uri = api_get_setting('sso_authentication_unauth_uri');
//cut the string to avoid recursive URL construction in case of failure
$this->referer = $this->protocol.$_SERVER['HTTP_HOST'].substr($_SERVER['REQUEST_URI'], 0, strpos($_SERVER['REQUEST_URI'], 'sso'));
$this->deauth_url = $this->protocol.$this->domain.$this->deauth_uri;
$this->master_url = $this->protocol.$this->domain.$this->auth_uri;
$this->referrer_uri = base64_encode($_SERVER['REQUEST_URI']);
$this->target = api_get_path(WEB_PATH);
}
/**
* Unlogs the user from the remote server.
*/
public function logout()
{
// no_redirect means Drupal sent the signal to logout. When redirecting to Drupal, the $_GET['stop'] param is
// set to 1, to allow Drupal to know that this is it, the logout is already done in Chamilo and there's no
// need to do it again
if (empty($_GET['no_redirect'])) {
header('Location: '.$this->deauth_url.'&stop=1');
} else {
header('Location: '.$this->protocol.$this->domain);
}
exit;
}
/**
* Sends the user to the master URL for a check of active connection.
*/
public function ask_master()
{
// Generate a single usage token that must be encoded by the master
$_SESSION['sso_challenge'] = api_generate_password(48);
// Redirect browser to the master URL
$params = '';
if (empty($_GET['no_redirect'])) {
$params = 'sso_referer='.urlencode($this->referer).
'&sso_target='.urlencode($this->target).
'&sso_challenge='.urlencode($_SESSION['sso_challenge']).
'&sso_ruri='.urlencode($this->referrer_uri);
if (strpos($this->master_url, "?") === false) {
$params = "?{$params}";
} else {
$params = "&{$params}";
}
}
header('Location: '.$this->master_url.$params);
exit;
}
/**
* Validates the received active connection data with the database.
*
* @return false|null Return the loginFailed variable value to local.inc.php
*/
public function check_user()
{
global $_user;
$loginFailed = false;
//change the way we recover the cookie depending on how it is formed
$sso = $this->decode_cookie($_GET['sso_cookie']);
//get token that should have been used and delete it
//from session since it can only be used once
$sso_challenge = '';
if (isset($_SESSION['sso_challenge'])) {
$sso_challenge = $_SESSION['sso_challenge'];
unset($_SESSION['sso_challenge']);
}
//lookup the user in the main database
$user_table = Database::get_main_table(TABLE_MAIN_USER);
$sql = "SELECT id, username, password, auth_source, active, expiration_date, status
FROM $user_table
WHERE username = '".trim(Database::escape_string($sso['username']))."'";
$result = Database::query($sql);
if (Database::num_rows($result) > 0) {
$uData = Database::fetch_array($result);
//Check the user's password
if ($uData['auth_source'] == PLATFORM_AUTH_SOURCE) {
if ($sso['secret'] === sha1($uData['username'].$sso_challenge.api_get_security_key())
&& ($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 (empty($uData['expiration_date']) or $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 (api_get_multiple_access_url()) {
//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['id']);
} else {
$current_access_url_id = 1;
$my_url_list = [1];
}
$my_user_is_admin = UserManager::is_admin($uData['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['id'];
$_user = api_get_user_info($_user['user_id']);
$_user['uidReset'] = true;
Session::write('_user', $_user);
Event::eventLogin($_user['user_id']);
// Redirect to homepage
$sso_target = '';
if (!empty($sso['ruri'])) {
//The referrer URI is *only* used if
// the user credentials are OK, which
// should be protection enough
// against evil URL spoofing...
$sso_target = api_get_path(WEB_PATH).base64_decode($sso['ruri']);
} else {
$sso_target = isset($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;
Session::erase('_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;
Session::erase('_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['id'];
$_user = api_get_user_info($_user['user_id']);
$is_platformAdmin = $uData['status'] == COURSEMANAGER;
Session::write('is_platformAdmin', $is_platformAdmin);
Session::write('_user', $_user);
Event::eventLogin($_user['user_id']);
} 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'];
$_user = api_get_user_info($_user['user_id']);
Session::write('_user', $_user);
Event::eventLogin($_user['user_id']);
} else {
$loginFailed = true;
Session::erase('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=access_url_inactive');
exit;
}
}
}
} else {
// user account expired
$loginFailed = true;
Session::erase('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_expired');
exit;
}
} else {
//User not active
$loginFailed = true;
Session::erase('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=account_inactive');
exit;
}
} else {
//SHA1 of password is wrong
$loginFailed = true;
Session::erase('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=wrong_password');
exit;
}
} else {
//Auth_source is wrong
$loginFailed = true;
Session::erase('_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;
Session::erase('_uid');
header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=user_not_found');
exit;
}
return $loginFailed;
}
/**
* Generate the URL for profile editing for a any user or the current user.
*
* @param int $userId Optional. The user id
* @param bool $asAdmin Optional. Whether get the URL for the platform admin
*
* @return string If the URL is obtained return the drupal_user_id. Otherwise return false
*/
public function generateProfileEditingURL($userId = 0, $asAdmin = false)
{
$userId = intval($userId);
if (empty($userId)) {
$userId = api_get_user_id();
}
$userExtraFieldValue = new ExtraFieldValue('user');
$drupalUserIdData = $userExtraFieldValue->get_values_by_handler_and_field_variable(
$userId,
'drupal_user_id'
);
// If this is an administrator, allow him to make some changes in
// the Chamilo profile
if ($asAdmin && api_is_platform_admin(true)) {
return api_get_path(WEB_CODE_PATH)."admin/user_edit.php?user_id=$userId";
}
// If the user doesn't match a Drupal user, give the normal profile
// link
if ($drupalUserIdData === false) {
return api_get_path(WEB_CODE_PATH).'auth/profile.php';
}
// In all other cases, generate a link to the Drupal profile edition
$drupalUserId = $drupalUserIdData['value'];
$url = "{$this->protocol}{$this->domain}/user/{$drupalUserId}/edit";
return $url;
}
/**
* Decode the cookie (this function may vary depending on the
* Single Sign On implementation.
*
* @param string Encoded cookie
*
* @return array Parsed and unencoded cookie
*/
private function decode_cookie($cookie)
{
return UnserializeApi::unserialize(
'not_allowed_classes',
base64_decode($cookie)
);
}
}
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