actions/userauthorization.php

   1 <?php
   2 /**
   3  * Let the user authorize a remote subscription request
   4  *
   5  * PHP version 5
   6  *
   7  * @category Action
   8  * @package  Laconica
   9  * @author   Evan Prodromou <evan@controlyourself.ca>
  10  * @author   Robin Millette <millette@controlyourself.ca>
  11  * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
  12  * @link     http://laconi.ca/
  13  *
  14  * Laconica - a distributed open-source microblogging tool
  15  * Copyright (C) 2008, 2009, Control Yourself, Inc.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU Affero General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU Affero General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU Affero General Public License
  28  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  */
  30
  31 if (!defined('LACONICA')) {
  32     exit(1);
  33 }
  34
  35 require_once INSTALLDIR.'/lib/omb.php';
  36 require_once INSTALLDIR.'/extlib/libomb/service_provider.php';
  37 require_once INSTALLDIR.'/extlib/libomb/profile.php';
  38 define('TIMESTAMP_THRESHOLD', 300);
  39
  40 class UserauthorizationAction extends Action
  41 {
  42     var $error;
  43     var $params;
  44
  45     function handle($args)
  46     {
  47         parent::handle($args);
  48
  49         if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  50             /* Use a session token for CSRF protection. */
  51             $token = $this->trimmed('token');
  52             if (!$token || $token != common_session_token()) {
  53                 $srv = $this->getStoredParams();
  54                 $this->showForm($srv->getRemoteUser(), _('There was a problem ' .
  55                                         'with your session token. Try again, ' .
  56                                         'please.'));
  57                 return;
  58             }
  59             /* We've shown the form, now post user's choice. */
  60             $this->sendAuthorization();
  61         } else {
  62             if (!common_logged_in()) {
  63                 /* Go log in, and then come back. */
  64                 common_set_returnto($_SERVER['REQUEST_URI']);
  65
  66                 common_redirect(common_local_url('login'));
  67                 return;
  68             }
  69
  70             $user    = common_current_user();
  71             $profile = $user->getProfile();
  72             if (!$profile) {
  73                 common_log_db_error($user, 'SELECT', __FILE__);
  74                 $this->serverError(_('User without matching profile'));
  75                 return;
  76             }
  77
  78             /* TODO: If no token is passed the user should get a prompt to enter
  79                it according to OAuth Core 1.0. */
  80             try {
  81                 $this->validateOmb();
  82                 $srv = new OMB_Service_Provider(
  83                         profile_to_omb_profile($user->uri, $profile),
  84                         omb_oauth_datastore());
  85
  86                 $remote_user = $srv->handleUserAuth();
  87             } catch (Exception $e) {
  88                 $this->clearParams();
  89                 $this->clientError($e->getMessage());
  90                 return;
  91             }
  92
  93             $this->storeParams($srv);
  94             $this->showForm($remote_user);
  95         }
  96     }
  97
  98     function showForm($params, $error=null)
  99     {
 100         $this->params = $params;
 101         $this->error  = $error;
 102         $this->showPage();
 103     }
 104
 105     function title()
 106     {
 107         return _('Authorize subscription');
 108     }
 109
 110     function showPageNotice()
 111     {
 112         $this->element('p', null, _('Please check these details to make sure '.
 113                                     'that you want to subscribe to this ' .
 114                                     'user’s notices. If you didn’t just ask ' .
 115                                     'to subscribe to someone’s notices, '.
 116                                     'click “Reject”.'));
 117     }
 118
 119     function showContent()
 120     {
 121         $params = $this->params;
 122
 123         $nickname = $params->getNickname();
 124         $profile  = $params->getProfileURL();
 125         $license  = $params->getLicenseURL();
 126         $fullname = $params->getFullname();
 127         $homepage = $params->getHomepage();
 128         $bio      = $params->getBio();
 129         $location = $params->getLocation();
 130         $avatar   = $params->getAvatarURL();
 131
 132         $this->elementStart('div', array('class' => 'profile'));
 133         $this->elementStart('div', 'entity_profile vcard');
 134         $this->elementStart('a', array('href' => $profile,
 135                                             'class' => 'url'));
 136         if ($avatar) {
 137             $this->element('img', array('src' => $avatar,
 138                                         'class' => 'photo avatar',
 139                                         'width' => AVATAR_PROFILE_SIZE,
 140                                         'height' => AVATAR_PROFILE_SIZE,
 141                                         'alt' => $nickname));
 142         }
 143         $hasFN = ($fullname !== '') ? 'nickname' : 'fn nickname';
 144         $this->elementStart('span', $hasFN);
 145         $this->raw($nickname);
 146         $this->elementEnd('span');
 147         $this->elementEnd('a');
 148
 149         if (!is_null($fullname)) {
 150             $this->elementStart('dl', 'entity_fn');
 151             $this->elementStart('dd');
 152             $this->elementStart('span', 'fn');
 153             $this->raw($fullname);
 154             $this->elementEnd('span');
 155             $this->elementEnd('dd');
 156             $this->elementEnd('dl');
 157         }
 158         if (!is_null($location)) {
 159             $this->elementStart('dl', 'entity_location');
 160             $this->element('dt', null, _('Location'));
 161             $this->elementStart('dd', 'label');
 162             $this->raw($location);
 163             $this->elementEnd('dd');
 164             $this->elementEnd('dl');
 165         }
 166
 167         if (!is_null($homepage)) {
 168             $this->elementStart('dl', 'entity_url');
 169             $this->element('dt', null, _('URL'));
 170             $this->elementStart('dd');
 171             $this->elementStart('a', array('href' => $homepage,
 172                                                 'class' => 'url'));
 173             $this->raw($homepage);
 174             $this->elementEnd('a');
 175             $this->elementEnd('dd');
 176             $this->elementEnd('dl');
 177         }
 178
 179         if (!is_null($bio)) {
 180             $this->elementStart('dl', 'entity_note');
 181             $this->element('dt', null, _('Note'));
 182             $this->elementStart('dd', 'note');
 183             $this->raw($bio);
 184             $this->elementEnd('dd');
 185             $this->elementEnd('dl');
 186         }
 187
 188         if (!is_null($license)) {
 189             $this->elementStart('dl', 'entity_license');
 190             $this->element('dt', null, _('License'));
 191             $this->elementStart('dd', 'license');
 192             $this->element('a', array('href' => $license,
 193                                       'class' => 'license'),
 194                            $license);
 195             $this->elementEnd('dd');
 196             $this->elementEnd('dl');
 197         }
 198         $this->elementEnd('div');
 199
 200         $this->elementStart('div', 'entity_actions');
 201         $this->elementStart('ul');
 202         $this->elementStart('li', 'entity_subscribe');
 203         $this->elementStart('form', array('method' => 'post',
 204                                           'id' => 'userauthorization',
 205                                           'class' => 'form_user_authorization',
 206                                           'name' => 'userauthorization',
 207                                           'action' => common_local_url(
 208                                                          'userauthorization')));
 209         $this->hidden('token', common_session_token());
 210
 211         $this->submit('accept', _('Accept'), 'submit accept', null,
 212                       _('Subscribe to this user'));
 213         $this->submit('reject', _('Reject'), 'submit reject', null,
 214                       _('Reject this subscription'));
 215         $this->elementEnd('form');
 216         $this->elementEnd('li');
 217         $this->elementEnd('ul');
 218         $this->elementEnd('div');
 219         $this->elementEnd('div');
 220     }
 221
 222     function sendAuthorization()
 223     {
 224         $srv = $this->getStoredParams();
 225
 226         if (is_null($srv)) {
 227             $this->clientError(_('No authorization request!'));
 228             return;
 229         }
 230
 231         $accepted = $this->arg('accept');
 232         try {
 233             list($val, $token) = $srv->continueUserAuth($accepted);
 234         } catch (Exception $e) {
 235             $this->clientError($e->getMessage());
 236             return;
 237         }
 238         if ($val !== false) {
 239             common_redirect($val, 303);
 240         } elseif ($accepted) {
 241             $this->showAcceptMessage($token);
 242         } else {
 243             $this->showRejectMessage();
 244         }
 245     }
 246
 247     function showAcceptMessage($tok)
 248     {
 249         common_show_header(_('Subscription authorized'));
 250         $this->element('p', null,
 251                        _('The subscription has been authorized, but no '.
 252                          'callback URL was passed. Check with the site’s ' .
 253                          'instructions for details on how to authorize the ' .
 254                          'subscription. Your subscription token is:'));
 255         $this->element('blockquote', 'token', $tok);
 256         common_show_footer();
 257     }
 258
 259     function showRejectMessage()
 260     {
 261         common_show_header(_('Subscription rejected'));
 262         $this->element('p', null,
 263                        _('The subscription has been rejected, but no '.
 264                          'callback URL was passed. Check with the site’s ' .
 265                          'instructions for details on how to fully reject ' .
 266                          'the subscription.'));
 267         common_show_footer();
 268     }
 269
 270     function storeParams($params)
 271     {
 272         common_ensure_session();
 273         $_SESSION['userauthorizationparams'] = serialize($params);
 274     }
 275
 276     function clearParams()
 277     {
 278         common_ensure_session();
 279         unset($_SESSION['userauthorizationparams']);
 280     }
 281
 282     function getStoredParams()
 283     {
 284         common_ensure_session();
 285         $params = unserialize($_SESSION['userauthorizationparams']);
 286         return $params;
 287     }
 288
 289     function validateOmb()
 290     {
 291         $listener = $_GET['omb_listener'];
 292         $listenee = $_GET['omb_listenee'];
 293         $nickname = $_GET['omb_listenee_nickname'];
 294         $profile  = $_GET['omb_listenee_profile'];
 295
 296         $user = User::staticGet('uri', $listener);
 297         if (!$user) {
 298             throw new Exception(sprintf(_('Listener URI ‘%s’ not found here'),
 299                                         $listener));
 300         }
 301
 302         if (strlen($listenee) > 255) {
 303             throw new Exception(sprintf(_('Listenee URI ‘%s’ is too long.'),
 304                                         $listenee));
 305         }
 306
 307         $other = User::staticGet('uri', $listenee);
 308         if ($other) {
 309             throw new Exception(sprintf(_('Listenee URI ‘%s’ is a local user.'),
 310                                         $listenee));
 311         }
 312
 313         $remote = Remote_profile::staticGet('uri', $listenee);
 314         if ($remote) {
 315             $sub             = new Subscription();
 316             $sub->subscriber = $user->id;
 317             $sub->subscribed = $remote->id;
 318             if ($sub->find(true)) {
 319                 throw new Exception('You are already subscribed to this user.');
 320             }
 321         }
 322
 323         if ($profile == common_profile_url($nickname)) {
 324             throw new Exception(sprintf(_('Profile URL ‘%s’ is for a local user.'),
 325                                         $profile));
 326
 327         }
 328
 329         $license      = $_GET['omb_listenee_license'];
 330         $site_license = common_config('license', 'url');
 331         if (!common_compatible_license($license, $site_license)) {
 332             throw new Exception(sprintf(_('Listenee stream license ‘%s’ is not ' .
 333                                           'compatible with site license ‘%s’.'),
 334                                         $license, $site_license));
 335         }
 336
 337         $avatar = $_GET['omb_listenee_avatar'];
 338         if ($avatar) {
 339             if (!common_valid_http_url($avatar) || strlen($avatar) > 255) {
 340                 throw new Exception(sprintf(_('Avatar URL ‘%s’ is not valid.'),
 341                                             $avatar));
 342             }
 343             $size = @getimagesize($avatar);
 344             if (!$size) {
 345                 throw new Exception(sprintf(_('Can’t read avatar URL ‘%s’.'),
 346                                             $avatar));
 347             }
 348             if (!in_array($size[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG,
 349                                           IMAGETYPE_PNG))) {
 350                 throw new Exception(sprintf(_('Wrong image type for avatar URL '.
 351                                               '‘%s’.'), $avatar));
 352             }
 353         }
 354     }
 355 }