125 lines
5 KiB
PHP
125 lines
5 KiB
PHP
<?php declare(strict_types=1);
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require 'init.php';
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$pageAddress = substr($_SERVER['REQUEST_URI'], strlen(CONF['common']['prefix']) + 1);
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if (strpos($pageAddress, '?') !== false) {
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parse_str(substr($pageAddress, strpos($pageAddress, '?') + 1), $_GET);
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$pageAddress = substr($pageAddress, 0, strpos($pageAddress, '?'));
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}
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define('PAGE_URL', $pageAddress);
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define('PAGE_ADDRESS', $pageAddress . ((substr($pageAddress, -1) === '/' OR $pageAddress === '') ? 'index' : ''));
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define('PAGE_LINEAGE', explode('/', PAGE_ADDRESS));
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define('SERVICE', dirname(PAGE_ADDRESS));
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function getPageInformations(array $pages, array $pageElements): array {
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if (!isset($pages['index']) OR $pageElements[0] === 'index')
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return [
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'titles_lineage' => [$pages[$pageElements[0]]['title'] ?? false],
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'page_metadata' => $pages[$pageElements[0]] ?? NULL,
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'terminal' => $pageElements[0] !== 'index'
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];
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$result = $pages['index']['title'];
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if (!isset($pageElements[1]))
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unset($pages['index']);
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else
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$pages = $pages[array_shift($pageElements)] ?? false;
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$results = getPageInformations($pages, $pageElements);
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$results['titles_lineage'][] = $result;
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return $results;
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}
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$pageInformations = getPageInformations(PAGES, PAGE_LINEAGE);
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define('TITLES_LINEAGE', array_reverse($pageInformations['titles_lineage']));
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define('PAGE_METADATA', $pageInformations['page_metadata']);
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define('PAGE_TERMINAL', $pageInformations['terminal']);
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if (!TITLES_LINEAGE[array_key_last(TITLES_LINEAGE)]) {
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http_response_code(404);
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exit('Page not found.');
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}
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if (isset($_SERVER['SERVER_NAME']) !== true)
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exit('Missing <code>$_SERVER[\'SERVER_NAME\']</code>');
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if (in_array($_SERVER['SERVER_NAME'], CONF['common']['public_domains'], true) !== true)
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exit('The current <code>$_SERVER[\'SERVER_NAME\']</code> is not allowed in configuration.');
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define('SERVER_NAME', $_SERVER['SERVER_NAME']);
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const SESSION_COOKIE_NAME = 'servnest-session-key';
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function startSession(): void {
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session_start([
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'name' => SESSION_COOKIE_NAME,
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'sid_length' => 64,
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'sid_bits_per_character' => 6,
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'cookie_secure' => true,
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'cookie_httponly' => true,
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'cookie_samesite' => 'Strict',
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'cookie_path' => CONF['common']['prefix'] . '/',
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'cookie_lifetime' => 432000, // = 60*60*24*5 = 5 days
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'gc_maxlifetime' => 10800,
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'use_strict_mode' => true,
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'use_cookies' => true,
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'use_only_cookies' => true,
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]);
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}
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if (isset($_COOKIE[SESSION_COOKIE_NAME]))
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startSession(); // Resume session
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if (isset($_SESSION['id'])) {
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if (!isset(query('select', 'users', ['id' => $_SESSION['id']], ['id'])[0]))
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logout();
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// Decrypt display username
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if (!isset($_COOKIE['display-username-decryption-key']))
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output(403, 'The display username decryption key has not been sent.');
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$decryption_result = sodium_crypto_aead_xchacha20poly1305_ietf_decrypt(
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$_SESSION['display-username-cyphertext'],
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'',
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$_SESSION['display-username-nonce'],
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base64_decode($_COOKIE['display-username-decryption-key'])
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);
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if ($decryption_result === false)
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output(403, 'Unable to decrypt display username.');
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define('DISPLAY_USERNAME', htmlspecialchars($decryption_result));
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// Enable not already enabled services for this user
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$user_services = array_filter(explode(',', query('select', 'users', ['id' => $_SESSION['id']], ['services'])[0]));
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foreach (SERVICES_USER as $service)
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if (!in_array($service, $user_services, true) AND CONF['common']['services'][$service] === 'enabled') {
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$user_services[] = $service;
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DB->prepare('UPDATE users SET services = :services WHERE id = :id')
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->execute([':services' => implode(',', $user_services), ':id' => $_SESSION['id']]);
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if ($service === 'ht')
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htSetupUserFs($_SESSION['id']);
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}
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}
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function displayFinalMessage(?array $data): void {
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if (isset($data['final_message'])) {
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echo $data['final_message'];
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unset($data['final_message']);
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}
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}
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if ($_POST !== []) {
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if (!in_array(CONF['common']['services']['auth'], ['enabled', 'no-registration'], true) OR (in_array(SERVICE, SERVICES_USER, true) AND CONF['common']['services'][SERVICE] !== 'enabled'))
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output(503, _('This service is currently under maintenance. No action can be taken on it until an administrator finishes repairing it.'));
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// Protect against cross-site request forgery if a POST request is received
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if (isset($_SERVER['HTTP_SEC_FETCH_SITE']) !== true)
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output(403, 'The <code>Sec-Fetch-Site</code> HTTP header is required when submitting a POST request to prevent Cross-Site Request Forgery (<abbr>CSRF</abbr>).');
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if (!in_array($_SERVER['HTTP_SEC_FETCH_SITE'], ['none', 'same-origin'], true))
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output(403, 'The <code>Sec-Fetch-Site</code> HTTP header must be <code>same-origin</code> or <code>none</code> when submitting a POST request to prevent Cross-Site Request Forgery (<abbr>CSRF</abbr>).');
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if (PAGE_METADATA['require-login'] ?? true AND !isset($_SESSION['id']))
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output(403, _('You need to be logged in to do this.'));
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if (file_exists(ROOT_PATH . '/pg-act/' . PAGE_ADDRESS . '.php'))
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require ROOT_PATH . '/pg-act/' . PAGE_ADDRESS . '.php';
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}
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function displayPage(?array $data): never {
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require ROOT_PATH . '/view.php';
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exit();
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}
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displayPage($data ??= NULL);
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