328 lines
10 KiB
PHP
328 lines
10 KiB
PHP
<?php
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/**
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* Authenticatie & Autorisatie Guard voor Fociz
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*/
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require_once __DIR__ . '/../config/database.php';
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require_once __DIR__ . '/totp.php';
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/**
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* Bepaalt of de huidige verbinding HTTPS gebruikt (inclusief reverse proxies / OpenResty / Docker)
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*/
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function is_https_request(): bool {
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if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
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return true;
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}
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if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) === 'https') {
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return true;
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}
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if (!empty($_SERVER['HTTP_X_FORWARDED_SSL']) && strtolower($_SERVER['HTTP_X_FORWARDED_SSL']) === 'on') {
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return true;
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}
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if (isset($_SERVER['SERVER_PORT']) && (int)$_SERVER['SERVER_PORT'] === 443) {
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return true;
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}
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if (defined('APP_URL') && str_starts_with(APP_URL, 'https://')) {
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return true;
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}
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return false;
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}
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function start_secure_session(): void {
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if (session_status() === PHP_SESSION_NONE) {
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// Zorg voor een ruime sessieduur (30 dagen)
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ini_set('session.gc_maxlifetime', '2592000');
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ini_set('session.cookie_lifetime', '2592000');
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ini_set('session.use_strict_mode', '1');
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ini_set('session.use_only_cookies', '1');
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$isSecure = is_https_request();
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session_set_cookie_params([
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'lifetime' => 30 * 24 * 60 * 60, // 30 dagen
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'path' => '/',
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'domain' => '',
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'secure' => $isSecure,
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'httponly' => true,
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'samesite' => 'Lax'
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]);
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session_start();
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}
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}
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/**
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* Controleert of er al een beheerder bestaat in MariaDB
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*/
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function has_admin_user(): bool {
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try {
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$db = get_db_connection();
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$stmt = $db->query("SELECT COUNT(*) FROM users WHERE role = 'ADMIN'");
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return ((int)$stmt->fetchColumn()) > 0;
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} catch (Throwable $e) {
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return false;
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}
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}
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/**
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* Garandeert dat de kolommen voor persistent sessiebeheer aanwezig zijn in MariaDB
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*/
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function ensure_remember_token_columns(PDO $db): void {
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static $columnsChecked = false;
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if ($columnsChecked) return;
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$columnsChecked = true;
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try {
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$result = $db->query("SHOW COLUMNS FROM `users` LIKE 'remember_token'");
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if (!$result || $result->rowCount() === 0) {
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$db->exec("ALTER TABLE `users` ADD COLUMN `remember_token` VARCHAR(64) NULL AFTER `backup_codes`, ADD COLUMN `remember_token_expires_at` DATETIME NULL AFTER `remember_token`");
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}
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} catch (Throwable $e) {
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// Stil negeren indien al aanwezig of tijdens migraties
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}
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}
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/**
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* Genereert en bewaart een persistente 'Onthoud mij' token in MariaDB en plaatst een veilige cookie
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*/
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function issue_remember_token(int $userId): string {
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$rawToken = bin2hex(random_bytes(32));
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$tokenHash = hash('sha256', $rawToken);
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$expiresAt = date('Y-m-d H:i:s', time() + (30 * 86400)); // 30 dagen geldig
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$db = get_db_connection();
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ensure_remember_token_columns($db);
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$stmt = $db->prepare("UPDATE users SET remember_token = ?, remember_token_expires_at = ? WHERE id = ?");
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$stmt->execute([$tokenHash, $expiresAt, $userId]);
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$isSecure = is_https_request();
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setcookie('fociz_remember', $rawToken, [
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'expires' => time() + (30 * 86400),
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'path' => '/',
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'secure' => $isSecure,
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'httponly' => true,
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'samesite' => 'Lax'
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]);
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return $rawToken;
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}
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/**
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* Verwijdert de persistente remember cookie
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*/
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function clear_remember_cookie(): void {
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$isSecure = is_https_request();
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setcookie('fociz_remember', '', [
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'expires' => time() - 86400,
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'path' => '/',
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'secure' => $isSecure,
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'httponly' => true,
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'samesite' => 'Lax'
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]);
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}
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/**
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* Haalt de huidige ingelogde gebruiker op uit de database.
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* Herstelt automatisch de sessie als een geldige 'fociz_remember' cookie aanwezig is.
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*/
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function get_logged_in_user(): ?array {
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start_secure_session();
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$db = get_db_connection();
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ensure_remember_token_columns($db);
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// 1. Controleer actieve PHP sessie
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if (!empty($_SESSION['user_id']) && !empty($_SESSION['is_2fa_verified'])) {
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$stmt = $db->prepare("SELECT id, name, email, role, two_factor_enabled, created_at FROM users WHERE id = ?");
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$stmt->execute([$_SESSION['user_id']]);
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$user = $stmt->fetch();
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if ($user) {
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return $user;
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}
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// Gebruiker bestaat niet meer in database
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$_SESSION = [];
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}
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// 2. Controleer persistente 'remember me' cookie (voorkomt ongewenst uitloggen bij refresh of herstart)
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if (!empty($_COOKIE['fociz_remember'])) {
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$rawToken = trim($_COOKIE['fociz_remember']);
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$tokenHash = hash('sha256', $rawToken);
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$stmt = $db->prepare("
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SELECT id, name, email, role, two_factor_enabled, created_at
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FROM users
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WHERE remember_token = ? AND remember_token_expires_at > NOW()
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");
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$stmt->execute([$tokenHash]);
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$user = $stmt->fetch();
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if ($user) {
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// Herstel volledige PHP sessie
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$_SESSION['user_id'] = $user['id'];
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$_SESSION['user_name'] = $user['name'];
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$_SESSION['user_email'] = $user['email'];
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$_SESSION['user_role'] = $user['role'];
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$_SESSION['is_2fa_verified'] = true;
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// Verleng direct de geldigheid van de remember token voor nog eens 30 dagen
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issue_remember_token((int)$user['id']);
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return $user;
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} else {
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clear_remember_cookie();
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}
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}
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return null;
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}
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/**
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* Beschermt pagina's: dwingt login + 2FA af
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*/
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function require_auth(bool $json = false): array {
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start_secure_session();
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$isAjax = $json ||
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(isset($_SERVER['HTTP_ACCEPT']) && str_contains($_SERVER['HTTP_ACCEPT'], 'application/json')) ||
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(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest');
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// 1. Controleer of eerste setup nodig is
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if (!has_admin_user()) {
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if ($isAjax) {
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http_response_code(401);
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header('Content-Type: application/json');
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echo json_encode(['success' => false, 'error' => 'Setup vereist']);
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exit;
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}
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header('Location: /auth/setup.php');
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exit;
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}
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// 2. Controleer of gebruiker ingelogd én 2FA geverifieerd is
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$user = get_logged_in_user();
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if (!$user) {
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if ($isAjax) {
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http_response_code(401);
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header('Content-Type: application/json');
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echo json_encode(['success' => false, 'error' => 'Niet geauthenticeerd of sessie verlopen']);
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exit;
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}
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header('Location: /auth/login.php');
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exit;
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}
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return $user;
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}
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/**
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* Dwingt beheerder (ADMIN) rol af
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*/
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function require_admin(): array {
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$user = require_auth();
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if ($user['role'] !== 'ADMIN') {
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header('Location: /planner.php');
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exit;
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}
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return $user;
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}
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/**
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* Maakt een nieuwe uitnodiging aan voor een collega
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*/
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function create_invite(int $createdById, string $email, string $role = 'MEMBER'): string {
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$db = get_db_connection();
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$token = bin2hex(random_bytes(24));
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$expiresAt = date('Y-m-d H:i:s', strtotime('+7 days'));
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$stmt = $db->prepare("INSERT INTO invites (token, email, role, expires_at, created_by_id) VALUES (?, ?, ?, ?, ?)");
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$stmt->execute([$token, strtolower(trim($email)), $role, $expiresAt, $createdById]);
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return $token;
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}
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/**
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* Valideert een invite token
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*/
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function validate_invite(string $token): ?array {
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$db = get_db_connection();
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$stmt = $db->prepare("
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SELECT i.*, u.name as inviter_name, u.email as inviter_email
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FROM invites i
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JOIN users u ON i.created_by_id = u.id
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WHERE i.token = ?
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");
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$stmt->execute([$token]);
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$invite = $stmt->fetch();
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if (!$invite) return null;
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if ($invite['used_at'] !== null) return null;
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if (strtotime($invite['expires_at']) < time()) return null;
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return $invite;
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}
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/**
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* CSRF token helpers
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*/
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function get_csrf_token(): string {
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start_secure_session();
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if (empty($_SESSION['csrf_token'])) {
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$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
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}
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return $_SESSION['csrf_token'];
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}
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function verify_csrf_token(?string $token): bool {
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start_secure_session();
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return !empty($token) && !empty($_SESSION['csrf_token']) && hash_equals($_SESSION['csrf_token'], $token);
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}
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/**
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* Genereert een cryptografisch ondertekende OAuth state parameter waarin de user_id en timestamp veilig zijn opgeslagen.
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* Dit voorkomt CSRF en maakt sessieherstel mogelijk bij cross-site OAuth redirects.
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*/
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function generate_oauth_state(int $userId): string {
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$secret = defined('APP_SECRET') ? APP_SECRET : (defined('DB_PASS') ? DB_PASS : 'fociz_oauth_salt_2026');
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$payload = [
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'uid' => $userId,
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'ts' => time(),
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'rnd' => bin2hex(random_bytes(8))
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];
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$json = json_encode($payload);
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$b64 = rtrim(strtr(base64_encode($json), '+/', '-_'), '=');
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$sig = hash_hmac('sha256', $b64, $secret);
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return $b64 . '.' . $sig;
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}
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/**
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* Valideert een ontvangen OAuth state parameter en geeft bij succes het geverifieerde user_id terug.
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* Geeft null terug bij ongeldige handtekening of verlopen state (> 30 minuten).
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*/
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function verify_oauth_state(string $state): ?int {
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$secret = defined('APP_SECRET') ? APP_SECRET : (defined('DB_PASS') ? DB_PASS : 'fociz_oauth_salt_2026');
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$parts = explode('.', $state, 2);
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if (count($parts) !== 2) {
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return null;
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}
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[$b64, $sig] = $parts;
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$expectedSig = hash_hmac('sha256', $b64, $secret);
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if (!hash_equals($expectedSig, $sig)) {
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return null;
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}
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$remainder = strlen($b64) % 4;
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if ($remainder) {
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$b64 .= str_repeat('=', 4 - $remainder);
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}
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$json = base64_decode(strtr($b64, '-_', '+/'));
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$payload = json_decode($json, true);
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if (!is_array($payload) || empty($payload['uid']) || empty($payload['ts'])) {
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return null;
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}
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// Geldigheidsduur: maximaal 30 minuten (1800 seconden)
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if (time() - (int)$payload['ts'] > 1800) {
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return null;
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}
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return (int)$payload['uid'];
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}
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