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<?php
/**
* Authentication Manager
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* @author André Noack <noack@data-quest.de>
*/
namespace Studip\Authentication;
use AccessDeniedException;
use Config;
use MessageBox;
use Metrics;
use PageLayout;
use Request;
use Seminar_Perm;
use Seminar_User;
use StudipAuthAbstract;
use StudipAuthSSO;
use StudipMail;
use Token;
use User;
class Manager
{
public const DEFAULT_KEPT_SESSION_VARIABLES = [
'auth',
'_language',
'phpCAS',
'contrast',
'redirect_after_login',
];
private ?array $auth = [];
public function __construct(
private bool $nobody = false
) {
}
public function getNobody(): bool
{
return $this->nobody;
}
public function setNobody(bool $allow_nobody = false): void
{
$this->nobody = $allow_nobody;
}
public function start(): bool
{
$this->auth =& $_SESSION['auth'];
if (!$this->isAuthenticated()) {
$user = null;
$provider = Request::option('sso');
if ($provider) {
Metrics::increment('core.sso_login.attempted');
// then do login
$authplugin = StudipAuthAbstract::GetInstance($provider);
if ($authplugin instanceof StudipAuthSSO) {
$user = $authplugin->authenticateUser('', '');
if ($user) {
if ($user->isExpired()) {
throw new AccessDeniedException(
_('Dieses Benutzerkonto ist abgelaufen. Wenden Sie sich bitte an die Administration.')
);
}
if ($user->locked) {
throw new AccessDeniedException(
_('Dieser Benutzer ist gesperrt! Wenden Sie sich bitte an die Administration.')
);
}
Metrics::increment('core.sso_login.succeeded');
$this->setAuthenticatedUser($user, $authplugin->getKeptVariables());
sess()->regenerateId(self::DEFAULT_KEPT_SESSION_VARIABLES);
} else {
PageLayout::postMessage(
MessageBox::error($authplugin->plugin_name . ': ' . _('Login fehlgeschlagen'),
$authplugin->error_msg ? [$authplugin->error_msg] : []),
md5($authplugin->error_msg)
);
}
}
}
if (!$user) {
if ($this->nobody && !Request::get('again') || match_route('dispatch.php/login')) {
$this->setAuthenticatedUser(User::build(['user_id' => 'nobody', 'perms' => null]));
} else {
return false;
}
}
} else {
$this->setAuthenticatedUser($this->auth['uid'] !== 'nobody' ? User::find($this->auth['uid']) : User::build(['user_id' => 'nobody', 'perms' => null]));
}
return true;
}
public function isAuthenticated(): string|false
{
if (!is_array($this->auth)) {
$this->auth = [];
}
if (
isset($this->auth['uid'])
&& $this->auth['uid'] === 'nobody'
&& (!$this->nobody || Request::option('again'))
) {
$this->auth['uid'] = null;
}
$maintenance_mode = Config::get()->getValue('MAINTENANCE_MODE_ENABLE');
//check if the user got kicked meanwhile, or if user is locked out
$user = null;
if (!empty($this->auth['uid']) && $this->auth['uid'] !== 'nobody') {
if (isset($GLOBALS['user']) && $GLOBALS['user']->id === $this->auth['uid']) {
$user = User::findCurrent();
} else {
$user = User::find($this->auth['uid']);
}
if (!$user->username || $user->isBlocked()) {
$this->auth = [];
}
} elseif ($maintenance_mode && Request::username('loginname')) {
$user = User::findByUsername(Request::username('loginname'));
}
if ($maintenance_mode && $user?->perms !== 'root') {
$this->auth = [];
throw new AccessDeniedException(_("Das System befindet sich im Wartungsmodus. Zur Zeit ist kein Zugriff möglich."));
}
return $this->auth['uid'] ?? false;
}
/**
* Sets the authenticated user and initializes global user and permission
* objects.
*
* @param User $user The user object representing the authenticated user.
* @param array $additional Additional key-value data to store in the authentication context.
*/
public function setAuthenticatedUser(User $user, array $additional = []): void
{
$this->auth['uid'] = $user->id;
foreach ($additional as $key => $value) {
$this->auth[$key] = $value;
}
$GLOBALS['user'] = new Seminar_User($user);
$GLOBALS['perm'] = new Seminar_Perm();
}
public function sendValidationMail(?User $user = null): void
{
$user ??= User::findCurrent();
// template-variables for the include partial
$Zeit = date('H:i:s, d.m.Y', $user->mkdate);
$username = $user->username;
$Vorname = $user->vorname;
$Nachname = $user->nachname;
$Email = $user->email;
// (re-)send the confirmation mail
$to = $user->email;
$token = Token::create(7 * 24 * 60 * 60, $user->id); // Link is valid for 1 week
$url = $GLOBALS['ABSOLUTE_URI_STUDIP'] . 'dispatch.php/registration/email_validation?secret=' . $token;
$mail = new StudipMail();
$abuse = $mail->getReplyToEmail();
$lang_path = getUserLanguagePath($user->id);
// include language-specific subject and mailbody
// TODO: This should be refactored so that the included file returns an array
include "locale/{$lang_path}/LC_MAILS/register_mail.inc.php"; // Defines $subject and $mailbody
// send the mail
$mail->setSubject($subject ?? '')
->addRecipient($to)
->setBodyText($mailbody ?? '')
->send();
}
/**
* Retrieves a session variable from the authentication context by its name.
*
* @param string $name The name of the session variable to retrieve
* @return mixed The value of the session variable, or null if it does not exist.
*/
public function getSessionVariable(string $name): mixed
{
return $this->auth[$name] ?? null;
}
}
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