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182 lines
6.2 KiB
182 lines
6.2 KiB
<?php
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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use \Firebase\JWT\JWT;
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class Auth {
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public function login(Request $request, Response $response) {
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session_start();
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if(session('user_id')) {
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$response->setStatusCode(302);
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$response->headers->set('Location', '/dashboard');
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} else {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'return_to' => $request->get('return_to')
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]));
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}
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return $response;
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}
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public function logout(Request $request, Response $response) {
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session_start();
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if(session('user_id')) {
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$_SESSION['user_id'] = null;
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session_destroy();
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}
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$response->setStatusCode(302);
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$response->headers->set('Location', '/login');
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return $response;
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}
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public function login_start(Request $request, Response $response) {
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if(!$request->get('url') || !($me = IndieAuth\Client::normalizeMeURL($request->get('url')))) {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Invalid URL',
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'error_description' => 'The URL you entered, "<strong>' . htmlspecialchars($request->get('url')) . '</strong>" is not valid.'
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]));
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return $response;
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}
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// Check if the user's URL defines an authorization endpoint
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$authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($me);
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if(!$authorizationEndpoint) {
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$authorizationEndpoint = Config::$defaultAuthorizationEndpoint;
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}
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$codeVerifier = IndieAuth\Client::generatePKCECodeVerifier();
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$state = JWT::encode([
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'az' => $authorizationEndpoint,
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'me' => $me,
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'code_verifier' => $codeVerifier,
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'return_to' => $request->get('return_to'),
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'time' => time(),
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'exp' => time()+300 // verified by the JWT library
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], Config::$secretKey);
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$authorizationURL = IndieAuth\Client::buildAuthorizationURL($authorizationEndpoint, [
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'me' => $me,
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'redirect_uri' => self::_buildRedirectURI(),
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'client_id' => Config::$clientID,
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'state' => $state,
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'code_verifier' => $codeVerifier,
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]);
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$response->setStatusCode(302);
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$response->headers->set('Location', $authorizationURL);
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return $response;
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}
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public function login_callback(Request $request, Response $response) {
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if(!$request->get('state') || !$request->get('code')) {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Missing Parameters',
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'error_description' => 'The auth server did not return the necessary parameters, <code>state</code> and <code>code</code>.'
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]));
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return $response;
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}
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// Validate the "state" parameter to ensure this request originated at this client
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try {
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$state = JWT::decode($request->get('state'), Config::$secretKey, ['HS256']);
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if(!$state) {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Invalid State',
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'error_description' => 'The <code>state</code> parameter was not valid.'
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]));
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return $response;
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}
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} catch(Exception $e) {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Invalid State',
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'error_description' => 'The <code>state</code> parameter was invalid:<br>'.htmlspecialchars($e->getMessage())
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]));
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return $response;
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}
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$authorizationEndpoint = $state->az;
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// Verify the code with the auth server
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$data = IndieAuth\Client::exchangeAuthorizationCode($state->az, [
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'code' => $request->get('code'),
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'redirect_uri' => self::_buildRedirectURI(),
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'client_id' => Config::$clientID,
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'code_verifier' => $state->code_verifier,
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]);
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if(!isset($data['response']['me'])) {
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// The authorization server didn't return a "me" URL
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Invalid Auth Server Response',
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'error_description' => 'The authorization server ('.$authorizationEndpoint.') did not return a valid response:<br><pre style="text-align:left; max-height: 400px; overflow: scroll;">HTTP '.$data['response_code']."\n\n".htmlspecialchars(json_encode($data)).'</pre>'
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]));
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return $response;
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}
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// Verify the authorization endpoint matches
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if($data['response']['me'] != $state->me) {
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$newAuthorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($data['response']['me']);
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if($newAuthorizationEndpoint != $authorizationEndpoint) {
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$response->setContent(view('login', [
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'title' => 'Sign In to Telegraph',
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'error' => 'Invalid Authorization Endpoint',
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'error_description' => 'The authorization endpoint for the returned profile URL ('.$data['response']['me'].') did not match the authorization endpoint used to begin the login.'
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]));
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return $response;
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}
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}
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$me = $data['response']['me'];
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// Create or load the user
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$user = ORM::for_table('users')->where('url', $me)->find_one();
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if(!$user) {
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$user = ORM::for_table('users')->create();
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$user->url = $me;
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$user->created_at = date('Y-m-d H:i:s');
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$user->last_login = date('Y-m-d H:i:s');
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$user->save();
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// Create a site for them with the default role
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$site = ORM::for_table('sites')->create();
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$site->name = 'My Website';
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$site->url = $me;
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$site->created_by = $user->id;
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$site->created_at = date('Y-m-d H:i:s');
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$site->save();
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$role = ORM::for_table('roles')->create();
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$role->site_id = $site->id;
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$role->user_id = $user->id;
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$role->role = 'owner';
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$role->token = random_string(32);
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$role->save();
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} else {
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$user->last_login = date('Y-m-d H:i:s');
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$user->save();
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}
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q()->queue('Telegraph\ProfileFetcher', 'fetch', [$user->id]);
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session_start();
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$_SESSION['user_id'] = $user->id;
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$response->setStatusCode(302);
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$response->headers->set('Location', ($state->return_to ?: '/dashboard'));
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return $response;
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}
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private static function _buildRedirectURI() {
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return Config::$base . 'login/callback';
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}
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}
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