86 lines
2.8 KiB
PHP
86 lines
2.8 KiB
PHP
<?php
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require 'config.php';
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header('Content-Type: application/json');
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$usersFile = USERS_DIR . USERS_FILE;
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// Determine if we are in setup mode:
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// - Query parameter setup=1 is passed
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// - And users.txt is either missing or empty
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$isSetup = (isset($_GET['setup']) && $_GET['setup'] == '1');
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if ($isSetup && (!file_exists($usersFile) || trim(file_get_contents($usersFile)) === '')) {
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// Allow initial admin creation without session checks.
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$setupMode = true;
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} else {
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$setupMode = false;
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// In non-setup mode, check CSRF token and require admin privileges.
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$headers = array_change_key_case(getallheaders(), CASE_LOWER);
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$receivedToken = isset($headers['x-csrf-token']) ? trim($headers['x-csrf-token']) : '';
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if ($receivedToken !== $_SESSION['csrf_token']) {
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echo json_encode(["error" => "Invalid CSRF token"]);
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http_response_code(403);
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exit;
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}
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if (
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!isset($_SESSION['authenticated']) || $_SESSION['authenticated'] !== true ||
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!isset($_SESSION['isAdmin']) || $_SESSION['isAdmin'] !== true
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) {
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echo json_encode(["error" => "Unauthorized"]);
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exit;
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}
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}
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// Get input data from JSON
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$data = json_decode(file_get_contents("php://input"), true);
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$newUsername = trim($data["username"] ?? "");
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$newPassword = trim($data["password"] ?? "");
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// In setup mode, force the new user to be admin.
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if ($setupMode) {
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$isAdmin = "1";
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} else {
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$isAdmin = !empty($data["isAdmin"]) ? "1" : "0"; // "1" for admin, "0" for regular user.
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}
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// Validate input
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if (!$newUsername || !$newPassword) {
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echo json_encode(["error" => "Username and password required"]);
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exit;
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}
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// Validate username using preg_match (allow letters, numbers, underscores, dashes, and spaces).
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if (!preg_match('/^[A-Za-z0-9_\- ]+$/', $newUsername)) {
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echo json_encode(["error" => "Invalid username. Only letters, numbers, underscores, dashes, and spaces are allowed."]);
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exit;
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}
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// Ensure users.txt exists
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if (!file_exists($usersFile)) {
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file_put_contents($usersFile, '');
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}
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// Check if username already exists
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$existingUsers = file($usersFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
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foreach ($existingUsers as $line) {
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list($storedUser, $storedHash, $storedRole) = explode(':', trim($line));
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if ($newUsername === $storedUser) {
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echo json_encode(["error" => "User already exists"]);
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exit;
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}
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}
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// Hash the password
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$hashedPassword = password_hash($newPassword, PASSWORD_BCRYPT);
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// Prepare new user line
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$newUserLine = $newUsername . ":" . $hashedPassword . ":" . $isAdmin . PHP_EOL;
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// In setup mode, overwrite users.txt; otherwise, append to it.
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if ($setupMode) {
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file_put_contents($usersFile, $newUserLine);
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} else {
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file_put_contents($usersFile, $newUserLine, FILE_APPEND);
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}
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echo json_encode(["success" => "User added successfully"]);
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?>
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