196 lines
7.5 KiB
PHP
196 lines
7.5 KiB
PHP
<?php
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//with db:
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header('Content-Type: application/json');
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require_once 'WebAuthn.php';
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include "../utils/security.php";
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secure_session_start();
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require_same_origin_request();
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require_csrf_token();
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// Assuming you've already established a database connection here
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include "../../config/config.php";
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$conn = new mysqli($DB_SERVERNAME, $DB_USERNAME, $DB_PASSWORD,$DB_DATABASE);
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if ($conn->connect_error) {
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$success=0;
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die("Connection failed: " . $conn->connect_error);
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}
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try {
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if (!isset($_SESSION["logged_in"]) || $_SESSION["logged_in"] !== true) {
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echo json_encode([
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'success' => false,
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'message' => 'Not logged in'
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]);
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exit();
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}
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// read get argument and post body
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$fn = filter_input(INPUT_GET, 'fn');
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if (!in_array($fn, ['getCreateArgs', 'processCreate'], true)) {
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throw new Exception('Invalid passkey operation.');
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}
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$requireResidentKey = !!filter_input(INPUT_GET, 'requireResidentKey');
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$userVerification = 'preferred';
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$userName = preg_replace('/[^0-9a-z_]/i', '', $_SESSION["username"] ?? "");
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if ($userName === "") {
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throw new Exception('Missing account session.');
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}
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$userId = bin2hex($userName);
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$userDisplayName = $userName;
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$userId = preg_replace('/[^0-9a-f]/i', '', $userId);
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$userDisplayName = preg_replace('/[^0-9a-z öüäéèàÖÜÄÉÈÀÂÊÎÔÛâêîôû]/i', '', $userDisplayName);
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$post = trim(file_get_contents('php://input'));
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if ($post) {
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$post = json_decode($post, null, 512, JSON_THROW_ON_ERROR);
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}
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if ($fn !== 'getStoredDataHtml') {
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// Formats
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$formats = [];
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$formats[] = 'android-key';
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$formats[] = 'android-safetynet';
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$formats[] = 'apple';
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$formats[] = 'fido-u2f';
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$formats[] = 'none';
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$formats[] = 'packed';
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$formats[] = 'tpm';
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$rpId = $_GET['rpId'] ?? $_SERVER['SERVER_NAME'];
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$typeUsb = true;
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$typeNfc = true;
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$typeBle = true;
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$typeInt = true;
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$typeHyb = true;
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// cross-platform: true, if type internal is not allowed
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// false, if only internal is allowed
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// null, if internal and cross-platform is allowed
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$crossPlatformAttachment = null;
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if (($typeUsb || $typeNfc || $typeBle || $typeHyb) && !$typeInt) {
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$crossPlatformAttachment = true;
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} else if (!$typeUsb && !$typeNfc && !$typeBle && !$typeHyb && $typeInt) {
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$crossPlatformAttachment = false;
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}
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// new Instance of the server library.
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// make sure that $rpId is the domain name.
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$WebAuthn = new lbuchs\WebAuthn\WebAuthn('WebAuthn Library', $rpId, $formats);
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// add root certificates to validate new registrations
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$WebAuthn->addRootCertificates('rootCertificates/solo.pem');
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$WebAuthn->addRootCertificates('rootCertificates/apple.pem');
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$WebAuthn->addRootCertificates('rootCertificates/yubico.pem');
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$WebAuthn->addRootCertificates('rootCertificates/hypersecu.pem');
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$WebAuthn->addRootCertificates('rootCertificates/globalSign.pem');
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$WebAuthn->addRootCertificates('rootCertificates/googleHardware.pem');
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$WebAuthn->addRootCertificates('rootCertificates/microsoftTpmCollection.pem');
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$WebAuthn->addRootCertificates('rootCertificates/mds');
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}
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// Handle different functions
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if ($fn === 'getCreateArgs') {
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check_rate_limit($conn, 'passkey_register_args', 10, 60 * 60, $userName);
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$createArgs = $WebAuthn->getCreateArgs(\hex2bin($userId), $userName, $userDisplayName, 60*4, $requireResidentKey, $userVerification, $crossPlatformAttachment);
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header('Content-Type: application/json');
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print(json_encode($createArgs));
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// save challange to session. you have to deliver it to processGet later.
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$_SESSION['challenge'] = $WebAuthn->getChallenge();
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$_SESSION['passkey_register_username'] = $userName;
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} else if ($fn === 'getGetArgs') {
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$ids = [];
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if ($requireResidentKey) {
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if (!isset($_SESSION['registrations']) || !is_array($_SESSION['registrations']) || count($_SESSION['registrations']) === 0) {
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throw new Exception('we do not have any registrations in session to check the registration');
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}
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} else {
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// load registrations from session stored there by processCreate.
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// normaly you have to load the credential Id's for a username
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// from the database.
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if (isset($_SESSION['registrations']) && is_array($_SESSION['registrations'])) {
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foreach ($_SESSION['registrations'] as $reg) {
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if ($reg->userId === $userId) {
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$ids[] = $reg->credentialId;
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}
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}
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}
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if (count($ids) === 0) {
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throw new Exception('no registrations in session for userId ' . $userId);
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}
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}
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$getArgs = $WebAuthn->getGetArgs($ids, 60*4, $typeUsb, $typeNfc, $typeBle, $typeHyb, $typeInt, $userVerification);
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header('Content-Type: application/json');
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print(json_encode($getArgs));
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// save challange to session. you have to deliver it to processGet later.
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$_SESSION['challenge'] = $WebAuthn->getChallenge();
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} else if ($fn === 'processCreate') {
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check_rate_limit($conn, 'passkey_register_process', 5, 60 * 60, $userName);
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if (empty($_SESSION['challenge']) || ($_SESSION['passkey_register_username'] ?? '') !== $userName) {
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throw new Exception('Invalid passkey session.');
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}
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foreach (['clientDataJSON', 'attestationObject'] as $requiredField) {
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if (!is_object($post) || empty($post->{$requiredField})) {
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throw new Exception('Invalid passkey response.');
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}
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}
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// Process create
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$challenge = $_SESSION['challenge'];
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$clientDataJSON = base64_decode($post->clientDataJSON);
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$attestationObject = base64_decode($post->attestationObject);
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// Process create and store data in the database
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$data = $WebAuthn->processCreate($clientDataJSON, $attestationObject, $challenge, $userVerification === 'required', true, false);
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// add user infos
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$data->userId = $userId;
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$data->userName = $userName;
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$data->userDisplayName = $userDisplayName;
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// Store registration data in the database
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$credentialId = $data->credentialId instanceof \lbuchs\WebAuthn\Binary\ByteBuffer ? $data->credentialId->getBinaryString() : (string)$data->credentialId;
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$credentialPublicKey = $data->credentialPublicKey;
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$signatureCounter = (int)$data->signatureCounter;
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$stmt = $conn->prepare("UPDATE users set credential_id = ?, public_key = ?, counter = ?, auth_method_enabled_passkey = 1, auth_method_required_passkey = 1 WHERE username = ?");
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$stmt->bind_param("ssis", $credentialId, $credentialPublicKey, $signatureCounter, $userName);
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$stmt->execute();
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$stmt->close();
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unset($_SESSION['challenge'], $_SESSION['passkey_register_username']);
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clear_rate_limit($conn, 'passkey_register_process', $userName);
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$msg = 'registration success.';
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$return = new stdClass();
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$return->success = true;
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$return->msg = $msg;
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header('Content-Type: application/json');
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print(json_encode($return));
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}
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} catch (Throwable $ex) {
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$return = new stdClass();
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$return->success = false;
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$return->msg = 'Passkey registration failed: ' . $ex->getMessage();
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header('Content-Type: application/json');
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print(json_encode($return));
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}
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?>
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