From 3f82ec2f757c62c25a31b461e0a0cddc14886117 Mon Sep 17 00:00:00 2001 From: Aaron Parecki Date: Sat, 24 May 2014 14:41:21 -0700 Subject: Working app! Copied signin logic from OwnYourGram. New "post" interface for writing a simple text post. Also supports browser geolocation. --- controllers/auth.php | 268 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 268 insertions(+) create mode 100644 controllers/auth.php (limited to 'controllers/auth.php') diff --git a/controllers/auth.php b/controllers/auth.php new file mode 100644 index 0000000..208f0f8 --- /dev/null +++ b/controllers/auth.php @@ -0,0 +1,268 @@ +get('/', function($format='html') use($app) { + $res = $app->response(); + + + ob_start(); + render('index', array( + 'title' => 'OwnYourGram', + 'meta' => '' + )); + $html = ob_get_clean(); + $res->body($html); +}); + +$app->get('/signin', function() use($app) { + $html = render('signin', array('title' => 'Sign In')); + $app->response()->body($html); +}); + +$app->get('/auth/start', function() use($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/ + // Normlize the value now (move this into a function in IndieAuth\Client later) + if(!array_key_exists('me', $params) || !($me = normalizeMeURL($params['me']))) { + $html = render('auth_error', array( + 'title' => 'Sign In', + 'error' => 'Invalid "me" Parameter', + 'errorDescription' => 'The ID you entered, ' . $params['me'] . ' is not valid.' + )); + $app->response()->body($html); + return; + } + + $authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($me); + $tokenEndpoint = IndieAuth\Client::discoverTokenEndpoint($me); + $micropubEndpoint = IndieAuth\Client::discoverMicropubEndpoint($me); + + if($tokenEndpoint && $micropubEndpoint && $authorizationEndpoint) { + // Generate a "state" parameter for the request + $state = IndieAuth\Client::generateStateParameter(); + $_SESSION['auth_state'] = $state; + + $scope = 'post'; + $authorizationURL = IndieAuth\Client::buildAuthorizationURL($authorizationEndpoint, $me, buildRedirectURI(), clientID(), $state, $scope); + } else { + $authorizationURL = false; + } + + // If the user has already signed in before and has a micropub access token, 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 && !array_key_exists('restart', $params)) { + + $user->micropub_endpoint = $micropubEndpoint; + $user->authorization_endpoint = $authorizationEndpoint; + $user->token_endpoint = $tokenEndpoint; + $user->save(); + + $app->redirect($authorizationURL, 301); + + } else { + + if(!$user) + $user = ORM::for_table('users')->create(); + $user->url = $me; + $user->date_created = date('Y-m-d H:i:s'); + $user->micropub_endpoint = $micropubEndpoint; + $user->authorization_endpoint = $authorizationEndpoint; + $user->token_endpoint = $tokenEndpoint; + $user->save(); + + $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); + } +}); + +$app->get('/auth/callback', function() use($app) { + $req = $app->request(); + $params = $req->params(); + + // Double check there is a "me" parameter + // Should only fail for really hacked up requests + if(!array_key_exists('me', $params) || !($me = normalizeMeURL($params['me']))) { + $html = render('auth_error', array( + 'title' => 'Auth Callback', + 'error' => 'Invalid "me" Parameter', + 'errorDescription' => 'The ID you entered, ' . $params['me'] . ' is not valid.' + )); + $app->response()->body($html); + return; + } + + // If there is no state in the session, start the login again + if(!array_key_exists('auth_state', $_SESSION)) { + $app->redirect('/auth/start?me='.urlencode($params['me'])); + 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.' + )); + $app->response()->body($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; + } + + // 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 + $micropubEndpoint = IndieAuth\Client::discoverMicropubEndpoint($me); + $tokenEndpoint = IndieAuth\Client::discoverTokenEndpoint($me); + + if($tokenEndpoint) { + $token = IndieAuth\Client::getAccessToken($tokenEndpoint, $params['code'], $params['me'], buildRedirectURI(), clientID(), $params['state'], 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'))) { + $_SESSION['auth'] = $token['auth']; + $_SESSION['me'] = $params['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->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'] = $user->id(); + } + + unset($_SESSION['auth_state']); + + if($redirectToDashboardImmediately) { + $app->redirect('/new', 301); + } else { + $html = render('auth_callback', array( + 'title' => 'Sign In', + 'me' => $me, + 'authorizing' => $me, + 'meParts' => parse_url($me), + 'tokenEndpoint' => $tokenEndpoint, + 'auth' => $token['auth'], + 'response' => $token['response'], + 'curl_error' => (array_key_exists('error', $token) ? $token['error'] : false) + )); + $app->response()->body($html); + } +}); + +$app->get('/signout', function() use($app) { + unset($_SESSION['auth']); + unset($_SESSION['me']); + unset($_SESSION['auth_state']); + unset($_SESSION['user_id']); + $app->redirect('/', 301); +}); + -- cgit v1.2.3