get('/auth/start', function() use($app) { $req = $app->request(); $params = $req->params(); // the "me" parameter is user input, and may be in a couple of different forms: // aaronparecki.com http://aaronparecki.com http://aaronparecki.com/ if(!array_key_exists('me', $params) || !($me = IndieAuth\Client::normalizeMeURL($params['me']))) { $html = render('auth_error', array( 'title' => 'Sign In', 'error' => 'Invalid "me" Parameter', 'errorDescription' => 'The URL you entered, "' . $params['me'] . '" is not valid.' )); $app->response()->body($html); return; } if(k($params, 'redirect')) { $_SESSION['redirect_after_login'] = $params['redirect']; } if(k($params, 'reply')) { $_SESSION['reply'] = $params['reply']; } $_SESSION['attempted_me'] = $me; $_SESSION['indieauth'] = [ 'authorization_endpoint' => ($authorizationEndpoint=IndieAuth\Client::discoverAuthorizationEndpoint($me)), 'token_endpoint' => ($tokenEndpoint=IndieAuth\Client::discoverTokenEndpoint($me)), 'micropub_endpoint' => ($micropubEndpoint=IndieAuth\Client::discoverMicropubEndpoint($me)), ]; $defaultScope = 'create update media'; if($tokenEndpoint && $micropubEndpoint && $authorizationEndpoint) { // Generate a "state" parameter for the request $state = IndieAuth\Client::generateStateParameter(); $_SESSION['auth_state'] = $state; $authorizationURL = IndieAuth\Client::buildAuthorizationURL($authorizationEndpoint, $me, buildRedirectURI(), Config::$base_url, $state, $defaultScope); } else { $authorizationURL = false; } // If the user has already signed in before and has a micropub access token, // and the endpoints are all the same, skip the debugging screens and redirect // immediately to the auth endpoint. // This will still generate a new access token when they finish logging in. $user = ORM::for_table('users')->where('url', $me)->find_one(); if($user && $user->micropub_access_token && $user->micropub_endpoint == $micropubEndpoint && $user->token_endpoint == $tokenEndpoint && $user->authorization_endpoint == $authorizationEndpoint && !array_key_exists('restart', $params)) { // TODO: fix this by caching the endpoints maybe in the session instead of writing them to the DB here. // Then remove the line below that blanks out the access token $user->micropub_endpoint = $micropubEndpoint; $user->authorization_endpoint = $authorizationEndpoint; $user->token_endpoint = $tokenEndpoint; $user->save(); // Request whatever scope was previously granted $authorizationURL = parse_url($authorizationURL); $authorizationURL['scope'] = $user->micropub_scope; $authorizationURL = http_build_url($authorizationURL); $app->redirect($authorizationURL, 302); } else { if(k($params, 'dontask') && $params['dontask']) { // Request whatever scope was previously granted $authorizationURL = parse_url($authorizationURL); $authorizationURL['scope'] = $user->micropub_scope ?: $defaultScope; $authorizationURL = http_build_url($authorizationURL); $_SESSION['dontask'] = 1; $app->redirect($authorizationURL, 302); } $html = render('auth_start', array( 'title' => 'Sign In', 'me' => $me, 'authorizing' => $me, 'meParts' => parse_url($me), 'tokenEndpoint' => $tokenEndpoint, 'micropubEndpoint' => $micropubEndpoint, 'authorizationEndpoint' => $authorizationEndpoint, 'authorizationURL' => $authorizationURL )); $app->response()->body($html); } }); $app->get('/auth/redirect', function() use($app) { $req = $app->request(); $params = $req->params(); if(!isset($params['scope'])) $params['scope'] = ''; $authorizationURL = parse_url($params['authorization_url']); parse_str($authorizationURL['query'], $query); $query['scope'] = $params['scope']; $authorizationURL['query'] = http_build_query($query); $authorizationURL = http_build_url($authorizationURL); $app->redirect($authorizationURL); return; }); $app->get('/auth/callback', function() use($app) { $req = $app->request(); $params = $req->params(); // If there is no state in the session, start the login again if(!array_key_exists('auth_state', $_SESSION)) { $html = render('auth_error', array( 'title' => 'Auth Callback', 'error' => 'Missing session state', 'errorDescription' => 'Something went wrong, please try signing in again, and make sure cookies are enabled for this domain.' )); $app->response()->body($html); return; } if(!array_key_exists('code', $params) || trim($params['code']) == '') { $html = render('auth_error', array( 'title' => 'Auth Callback', 'error' => 'Missing authorization code', 'errorDescription' => 'No authorization code was provided in the request.' )); $app->response()->body($html); return; } // Verify the state came back and matches what we set in the session // Should only fail for malicious attempts, ok to show a not as nice error message if(!array_key_exists('state', $params)) { $html = render('auth_error', array( 'title' => 'Auth Callback', 'error' => 'Missing state parameter', 'errorDescription' => 'No state parameter was provided in the request. This shouldn\'t happen. It is possible this is a malicious authorization attempt, or your authorization server failed to pass back the "state" parameter.' )); $app->response()->body($html); return; } if($params['state'] != $_SESSION['auth_state']) { $html = render('auth_error', array( 'title' => 'Auth Callback', 'error' => 'Invalid state', 'errorDescription' => 'The state parameter provided did not match the state provided at the start of authorization. This is most likely caused by a malicious authorization attempt.' )); $app->response()->body($html); return; } if(!isset($_SESSION['attempted_me'])) { $html = render('auth_error', [ 'title' => 'Auth Callback', 'error' => 'Missing data', 'errorDescription' => 'We forgot who was logging in. It\'s possible you took too long to finish signing in, or something got mixed up by signing in in another tab.' ]); $app->response()->body($html); return; } $me = $_SESSION['attempted_me']; // Now the basic sanity checks have passed. Time to start providing more helpful messages when there is an error. // An authorization code is in the query string, and we want to exchange that for an access token at the token endpoint. // Discover the endpoints $micropubEndpoint = $_SESSION['indieauth']['micropub_endpoint']; $tokenEndpoint = $_SESSION['indieauth']['token_endpoint']; if($tokenEndpoint) { $token = IndieAuth\Client::getAccessToken($tokenEndpoint, $params['code'], $me, buildRedirectURI(), Config::$base_url, true); } else { $token = array('auth'=>false, 'response'=>false); } $redirectToDashboardImmediately = false; // If a valid access token was returned, store the token info in the session and they are signed in if(k($token['auth'], array('me','access_token','scope'))) { // Double check that the domain of the returned "me" matches the expected if(!\p3k\url\host_matches($token['auth']['me'], $me)) { $html = render('auth_error', [ 'title' => 'Error Signing In', 'error' => 'Invalid user', 'errorDescription' => 'The user URL that was returned from the token endpoint ('.$token['auth']['me'].') did not match the domain of the user signing in ('.$me.').' ]); $app->response()->body($html); return; } $_SESSION['auth'] = $token['auth']; $_SESSION['me'] = $me = $token['auth']['me']; $user = ORM::for_table('users')->where('url', $me)->find_one(); if($user) { // Already logged in, update the last login date $user->last_login = date('Y-m-d H:i:s'); // If they have logged in before and we already have an access token, then redirect to the dashboard now if($user->micropub_access_token) $redirectToDashboardImmediately = true; } else { // New user! Store the user in the database $user = ORM::for_table('users')->create(); $user->url = $me; $user->date_created = date('Y-m-d H:i:s'); } $user->authorization_endpoint = $_SESSION['indieauth']['authorization_endpoint']; $user->token_endpoint = $tokenEndpoint; $user->micropub_endpoint = $micropubEndpoint; $user->micropub_access_token = $token['auth']['access_token']; $user->micropub_scope = $token['auth']['scope']; $user->micropub_response = $token['response']; $user->save(); $_SESSION['user_id'] = $user->id(); // Make a request to the micropub endpoint to discover the syndication targets and media endpoint if any. // Errors are silently ignored here. The user will be able to retry from the new post interface and get feedback. get_micropub_config($user, ['q'=>'config']); } unset($_SESSION['auth_state']); unset($_SESSION['attempted_me']); unset($_SESSION['indieauth']); if($redirectToDashboardImmediately || k($_SESSION, 'dontask')) { unset($_SESSION['dontask']); if(k($_SESSION, 'redirect_after_login')) { $dest = $_SESSION['redirect_after_login']; unset($_SESSION['redirect_after_login']); $app->redirect($dest, 302); } else { $query = []; if(k($_SESSION, 'reply')) { $query['reply'] = $_SESSION['reply']; unset($_SESSION['reply']); } $app->redirect('/new?' . http_build_query($query), 302); } } else { $tokenResponse = $token['response']; $parsed = @json_decode($tokenResponse); if($parsed) $tokenResponse = json_encode($parsed, JSON_PRETTY_PRINT+JSON_UNESCAPED_SLASHES); $html = render('auth_callback', array( 'title' => 'Sign In', 'me' => $me, 'authorizing' => $me, 'meParts' => parse_url($me), 'tokenEndpoint' => $tokenEndpoint, 'auth' => $token['auth'], 'response' => $tokenResponse, 'curl_error' => (array_key_exists('error', $token) ? $token['error'] : false), 'destination' => (k($_SESSION, 'redirect_after_login') ?: '/new') )); $app->response()->body($html); } }); $app->get('/signout', function() use($app) { unset($_SESSION['auth']); unset($_SESSION['me']); unset($_SESSION['auth_state']); unset($_SESSION['user_id']); $app->redirect('/', 302); }); $app->post('/auth/reset', function() use($app) { if($user=require_login($app, false)) { revoke_micropub_token($user->micropub_access_token, $user->token_endpoint); $user->authorization_endpoint = ''; $user->token_endpoint = ''; $user->micropub_endpoint = ''; $user->authorization_endpoint = ''; $user->micropub_media_endpoint = ''; $user->micropub_scope = ''; $user->micropub_access_token = ''; $user->save(); unset($_SESSION['auth']); unset($_SESSION['me']); unset($_SESSION['auth_state']); unset($_SESSION['user_id']); } $app->redirect('/', 302); }); $app->post('/auth/twitter', function() use($app) { if($user=require_login($app, false)) { $params = $app->request()->params(); // User just auth'd with twitter, store the access token $user->twitter_access_token = $params['twitter_token']; $user->twitter_token_secret = $params['twitter_secret']; $user->save(); $app->response()['Content-type'] = 'application/json'; $app->response()->body(json_encode(array( 'result' => 'ok' ))); } else { $app->response()['Content-type'] = 'application/json'; $app->response()->body(json_encode(array( 'result' => 'error' ))); } }); function getTwitterLoginURL(&$twitter) { $request_token = $twitter->oauth('oauth/request_token', [ 'oauth_callback' => Config::$base_url . 'auth/twitter/callback' ]); $_SESSION['twitter_auth'] = $request_token; return $twitter->url('oauth/authorize', ['oauth_token' => $request_token['oauth_token']]); } $app->get('/auth/twitter', function() use($app) { $params = $app->request()->params(); if($user=require_login($app, false)) { // If there is an existing Twitter token, check if it is valid // Otherwise, generate a Twitter login link $twitter_login_url = false; if(array_key_exists('login', $params)) { $twitter = new TwitterOAuth(Config::$twitterClientID, Config::$twitterClientSecret); $twitter_login_url = getTwitterLoginURL($twitter); } else { $twitter = new TwitterOAuth(Config::$twitterClientID, Config::$twitterClientSecret, $user->twitter_access_token, $user->twitter_token_secret); if($user->twitter_access_token) { if($twitter->get('account/verify_credentials')) { $app->response()['Content-type'] = 'application/json'; $app->response()->body(json_encode(array( 'result' => 'ok' ))); return; } else { // If the existing twitter token is not valid, generate a login link $twitter_login_url = getTwitterLoginURL($twitter); } } else { $twitter_login_url = getTwitterLoginURL($twitter); } } $app->response()['Content-type'] = 'application/json'; $app->response()->body(json_encode(array( 'url' => $twitter_login_url ))); } else { $app->response()['Content-type'] = 'application/json'; $app->response()->body(json_encode(array( 'result' => 'error' ))); } }); $app->get('/auth/twitter/callback', function() use($app) { if($user=require_login($app)) { $params = $app->request()->params(); $twitter = new TwitterOAuth(Config::$twitterClientID, Config::$twitterClientSecret, $_SESSION['twitter_auth']['oauth_token'], $_SESSION['twitter_auth']['oauth_token_secret']); $credentials = $twitter->oauth('oauth/access_token', ['oauth_verifier' => $params['oauth_verifier']]); $user->twitter_access_token = $credentials['oauth_token']; $user->twitter_token_secret = $credentials['oauth_token_secret']; $user->twitter_username = $credentials['screen_name']; $user->save(); $app->redirect('/settings'); } });