actions/userauthorization.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, Inc.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Affero General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 if (!defined('LACONICA')) { exit(1); }
  21
  22 require_once(INSTALLDIR.'/lib/omb.php');
  23 define('TIMESTAMP_THRESHOLD', 300);
  24
  25 class UserauthorizationAction extends Action {
  26         function handle($args) {
  27                 parent::handle($args);
  28
  29                 if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  30                         # We've shown the form, now post user's choice
  31                         $this->send_authorization();
  32                 } else {
  33                         try {
  34                                 common_debug('userauthorization.php - fetching request');
  35                                 # We get called after login if we have a stored request
  36                                 $req = $this->get_stored_request();
  37                                 if (!$req) {
  38                                         # this must be a new request
  39                                         $req = $this->get_new_request();
  40                                         # XXX: only validate new requests, since nonce is one-time use
  41                                         $this->validate_request($req);
  42                                 }
  43                                 if (!$req) {
  44                                         common_server_error(_t('No request found!'));
  45                                 }
  46                         } catch (OAuthException $e) {
  47                                 $this->clear_request();
  48                                 common_server_error($e->getMessage());
  49                                 return;
  50                         }
  51
  52                         if (common_logged_in()) {
  53                                 $this->show_form($req);
  54                         } else {
  55                                 # Go log in, and then come back
  56                                 $this->store_request($req);
  57                                 common_set_returnto(common_local_url('userauthorization'));
  58                                 common_redirect(common_local_url('login'));
  59                         }
  60                 }
  61         }
  62
  63         function show_form($req) {
  64
  65                 $nickname = $req->get_parameter('omb_listenee_nickname');
  66                 $profile = $req->get_parameter('omb_listenee_profile');
  67                 $license = $req->get_parameter('omb_listenee_license');
  68                 $fullname = $req->get_parameter('omb_listenee_fullname');
  69                 $homepage = $req->get_parameter('omb_listenee_homepage');
  70                 $bio = $req->get_parameter('omb_listenee_bio');
  71                 $location = $req->get_parameter('omb_listenee_location');
  72                 $avatar = $req->get_parameter('omb_listenee_avatar');
  73
  74                 common_show_header(_t('Authorize subscription'));
  75                 common_element('p', _t('Please check these details to make sure '.
  76                                                            'that you want to subscribe to this user\'s notices. '.
  77                                                            'If you didn\'t just ask to subscribe to someone\'s notices, '.
  78                                                            'click "Cancel".'));
  79                 common_element_start('div', 'profile');
  80                 if ($avatar) {
  81                         common_element('img', array('src' => $avatar,
  82                                                                                 'class' => 'avatar profile',
  83                                                                                 'width' => AVATAR_PROFILE_SIZE,
  84                                                                                 'height' => AVATAR_PROFILE_SIZE,
  85                                                                                 'alt' => $nickname));
  86                 }
  87                 common_element('a', array('href' => $profile,
  88                                                                   'class' => 'external profile nickname'),
  89                                            $nickname);
  90                 if ($fullname) {
  91                         common_element_start('div', 'fullname');
  92                         if ($homepage) {
  93                                 common_element('a', array('href' => $homepage),
  94                                                            $fullname);
  95                         } else {
  96                                 common_text($fullname);
  97                         }
  98                         common_element_end('div');
  99                 }
 100                 if ($location) {
 101                         common_element('div', 'location', $location);
 102                 }
 103                 if ($bio) {
 104                         common_element('div', 'bio', $bio);
 105                 }
 106                 common_element_start('div', 'license');
 107                 common_element('a', array('href' => $license,
 108                                                                   'class' => 'license'),
 109                                            $license);
 110                 common_element_end('div');
 111                 common_element_end('div');
 112                 common_element_start('form', array('method' => 'POST',
 113                                                                                    'id' => 'userauthorization',
 114                                                                                    'name' => 'userauthorization',
 115                                                                                    'action' => common_local_url('userauthorization')));
 116                 common_submit('accept', _t('Accept'));
 117                 common_submit('reject', _t('Reject'));
 118                 common_element_end('form');
 119                 common_show_footer();
 120         }
 121
 122         function send_authorization() {
 123                 $req = $this->get_stored_request();
 124
 125                 if (!$req) {
 126                         common_user_error(_t('No authorization request!'));
 127                         return;
 128                 }
 129
 130                 $callback = $req->get_parameter('oauth_callback');
 131
 132                 if ($this->arg('accept')) {
 133                         $this->authorize_token($req);
 134                         $this->save_remote_profile($req);
 135                         if (!$callback) {
 136                                 $this->show_accept_message($req->get_parameter('oauth_token'));
 137                         } else {
 138                                 $params = array();
 139                                 $params['oauth_token'] = $req->get_parameter('oauth_token');
 140                                 $params['omb_version'] = OMB_VERSION_01;
 141                                 $user = User::staticGet('uri', $req->get_parameter('omb_listener'));
 142                                 $profile = $user->getProfile();
 143                                 $params['omb_listener_nickname'] = $user->nickname;
 144                                 $params['omb_listener_profile'] = common_local_url('showstream',
 145                                                                                                                                    array('nickname' => $user->nickname));
 146                                 if ($profile->fullname) {
 147                                         $params['omb_listener_fullname'] = $profile->fullname;
 148                                 }
 149                                 if ($profile->homepage) {
 150                                         $params['omb_listener_homepage'] = $profile->homepage;
 151                                 }
 152                                 if ($profile->bio) {
 153                                         $params['omb_listener_bio'] = $profile->bio;
 154                                 }
 155                                 if ($profile->location) {
 156                                         $params['omb_listener_location'] = $profile->location;
 157                                 }
 158                                 $avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
 159                                 if ($avatar) {
 160                                         $params['omb_listener_avatar'] = $avatar->url;
 161                                 }
 162                                 $parts = array();
 163                                 foreach ($params as $k => $v) {
 164                                         $parts[] = $k . '=' . OAuthUtil::urlencodeRFC3986($v);
 165                                 }
 166                                 $query_string = implode('&', $parts);
 167                                 $parsed = parse_url($callback);
 168                                 $url = $callback . (($parsed['query']) ? '&' : '?') . $query_string;
 169                                 common_redirect($url, 303);
 170                         }
 171                 } else {
 172                         if (!$callback) {
 173                                 $this->show_reject_message();
 174                         } else {
 175                                 # XXX: not 100% sure how to signal failure... just redirect without token?
 176                                 common_redirect($callback, 303);
 177                         }
 178                 }
 179         }
 180
 181         function authorize_token(&$req) {
 182                 $consumer_key = @$req->get_parameter('oauth_consumer_key');
 183                 $token_field = @$req->get_parameter('oauth_token');
 184                 $rt = new Token();
 185                 $rt->consumer_key = $consumer_key;
 186                 $rt->tok = $token_field;
 187                 if ($rt->find(TRUE)) {
 188                         $orig_rt = clone($rt);
 189                         $rt->state = 1; # Authorized but not used
 190                         if ($rt->update($orig_rt)) {
 191                                 return true;
 192                         }
 193                 }
 194                 return FALSE;
 195         }
 196
 197         # XXX: refactor with similar code in finishremotesubscribe.php
 198
 199         function save_remote_profile(&$req) {
 200                 # FIXME: we should really do this when the consumer comes
 201                 # back for an access token. If they never do, we've got stuff in a
 202                 # weird state.
 203
 204                 $fullname = $req->get_parameter('omb_listenee_fullname');
 205                 $profile_url = $req->get_parameter('omb_listenee_profile');
 206                 $homepage = $req->get_parameter('omb_listenee_homepage');
 207                 $bio = $req->get_parameter('omb_listenee_bio');
 208                 $location = $req->get_parameter('omb_listenee_location');
 209                 $avatar_url = $req->get_parameter('omb_listenee_avatar');
 210
 211                 $listenee = $req->get_parameter('omb_listenee');
 212                 $remote = Remote_profile::staticGet('uri', $listenee);
 213
 214                 if ($remote) {
 215                         $exists = true;
 216                         $profile = Profile::staticGet($remote->id);
 217                         $orig_remote = clone($remote);
 218                         $orig_profile = clone($profile);
 219                 } else {
 220                         $exists = false;
 221                         $remote = new Remote_profile();
 222                         $remote->uri = $omb['listener'];
 223                         $profile = new Profile();
 224                 }
 225
 226                 $profile->nickname = $nickname;
 227                 $profile->profileurl = $profile_url;
 228
 229                 if ($fullname) {
 230                         $profile->fullname = $fullname;
 231                 }
 232                 if ($homepage) {
 233                         $profile->homepage = $homepage;
 234                 }
 235                 if ($bio) {
 236                         $profile->bio = $bio;
 237                 }
 238                 if ($location) {
 239                         $profile->location = $location;
 240                 }
 241
 242                 if ($exists) {
 243                         $profile->update($orig_profile);
 244                 } else {
 245                         $profile->created = DB_DataObject_Cast::dateTime(); # current time
 246                         $id = $profile->insert();
 247                         $remote->id = $id;
 248                 }
 249
 250                 if ($avatar_url) {
 251                         $this->add_avatar($avatar_url);
 252                 }
 253
 254                 if ($exists) {
 255                         $remote->update($orig_remote);
 256                 } else {
 257                         $remote->created = DB_DataObject_Cast::dateTime(); # current time
 258                         $remote->insert();
 259                 }
 260
 261                 $user = common_current_user();
 262                 $datastore = omb_oauth_datastore();
 263                 $consumer = $this->get_consumer($datastore, $req);
 264                 $token = $this->get_token($datastore, $req, $consumer);
 265
 266                 $sub = new Subscription();
 267                 $sub->subscriber = $user->id;
 268                 $sub->subscribed = $remote->id;
 269                 $sub->token = $token->key; # NOTE: request token, not valid for use!
 270                 $sub->created = DB_DataObject_Cast::dateTime(); # current time
 271
 272                 if (!$sub->insert()) {
 273                         common_user_error(_t('Couldn\'t insert new subscription.'));
 274                         return;
 275                 }
 276         }
 277
 278         function show_accept_message($tok) {
 279                 common_show_header(_t('Subscription authorized'));
 280                 common_element('p', NULL,
 281                                            _t('The subscription has been authorized, but no '.
 282                                                   'callback URL was passed. Check with the site\'s instructions for '.
 283                                                   'details on how to authorize the subscription. Your subscription token is:'));
 284                 common_element('blockquote', 'token', $tok);
 285                 common_show_footer();
 286         }
 287
 288         function show_reject_message($tok) {
 289                 common_show_header(_t('Subscription rejected'));
 290                 common_element('p', NULL,
 291                                            _t('The subscription has been rejected, but no '.
 292                                                   'callback URL was passed. Check with the site\'s instructions for '.
 293                                                   'details on how to fully reject the subscription.'));
 294                 common_show_footer();
 295         }
 296
 297         function store_request($req) {
 298                 common_ensure_session();
 299                 $_SESSION['userauthorizationrequest'] = $req;
 300         }
 301
 302         function clear_request($req) {
 303                 common_ensure_session();
 304                 unset($_SESSION['userauthorizationrequest']);
 305         }
 306
 307         function get_stored_request() {
 308                 common_ensure_session();
 309                 $req = $_SESSION['userauthorizationrequest'];
 310                 return $req;
 311         }
 312
 313         function get_new_request() {
 314                 $req = OAuthRequest::from_request();
 315         }
 316
 317         # Throws an OAuthException if anything goes wrong
 318
 319         function validate_request($req) {
 320                 # OAuth stuff -- have to copy from OAuth.php since they're
 321                 # all private methods, and there's no user-authentication method
 322                 $this->check_version($req);
 323                 $datastore = omb_oauth_datastore();
 324                 $consumer = $this->get_consumer($datastore, $req);
 325                 $token = $this->get_token($datastore, $req, $consumer);
 326                 $this->check_timestamp($req);
 327                 $this->check_nonce($datastore, $req, $consumer, $token);
 328                 $this->check_signature($req, $consumer, $token);
 329                 $this->validate_omb($req);
 330                 return true;
 331         }
 332
 333         function validate_omb(&$req) {
 334                 foreach (array('omb_version', 'omb_listener', 'omb_listenee',
 335                                            'omb_listenee_profile', 'omb_listenee_nickname',
 336                                            'omb_listenee_license') as $param)
 337                 {
 338                         if (!$req->get_parameter($param)) {
 339                                 throw new OAuthException("Required parameter '$param' not found");
 340                         }
 341                 }
 342                 # Now, OMB stuff
 343                 $version = $req->get_parameter('omb_version');
 344                 if ($version != OMB_VERSION_01) {
 345                         throw new OAuthException("OpenMicroBlogging version '$version' not supported");
 346                 }
 347                 $user = User::staticGet('uri', $req->get_parameter('omb_listener'));
 348                 if (!$user) {
 349                         throw new OAuthException("Listener URI '$listener' not found here");
 350                 }
 351                 $listenee = $req->get_parameter('omb_listenee');
 352                 if (!Validate::uri($listenee)) {
 353                         throw new OAuthException("Listenee URI '$listenee' not a valid URI");
 354                 } else if (strlen($listenee) > 255) {
 355                         throw new OAuthException("Listenee URI '$listenee' too long");
 356                 }
 357                 $nickname = $req->get_parameter('omb_listenee_nickname');
 358                 if (!Validate::string($nickname, array('min_length' => 1,
 359                                                                                            'max_length' => 64,
 360                                                                                            'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
 361                         throw new OAuthException('Nickname must have only letters and numbers and no spaces.');
 362                 }
 363                 $profile = $req->get_parameter('omb_listenee_profile');
 364                 if (!common_valid_http_url($profile)) {
 365                         throw new OAuthException("Invalid profile URL '$profile'.");
 366                 }
 367                 $license = $req->get_parameter('omb_listenee_license');
 368                 if (!common_valid_http_url($license)) {
 369                         throw new OAuthException("Invalid license URL '$license'.");
 370                 }
 371                 # optional stuff
 372                 $fullname = $req->get_parameter('omb_listenee_fullname');
 373                 if ($fullname && strlen($fullname) > 255) {
 374                         throw new OAuthException("Full name '$fullname' too long.");
 375                 }
 376                 $homepage = $req->get_parameter('omb_listenee_homepage');
 377                 if ($homepage && (!common_valid_http_url($homepage) || strlen($homepage) > 255)) {
 378                         throw new OAuthException("Invalid homepage '$homepage'");
 379                 }
 380                 $bio = $req->get_parameter('omb_listenee_bio');
 381                 if ($bio && strlen($bio) > 140) {
 382                         throw new OAuthException("Bio too long '$bio'");
 383                 }
 384                 $location = $req->get_parameter('omb_listenee_location');
 385                 if ($location && strlen($location) > 255) {
 386                         throw new OAuthException("Location too long '$location'");
 387                 }
 388                 $avatar = $req->get_parameter('omb_listenee_avatar');
 389                 if ($avatar && (!common_valid_http_url($avatar) || strlen($avatar) > 255)) {
 390                         throw new OAuthException("Invalid avatar '$avatar'");
 391                 }
 392                 $callback = $req->get_parameter('oauth_callback');
 393                 if ($avatar && common_valid_http_url($callback)) {
 394                         throw new OAuthException("Invalid callback URL '$callback'");
 395                 }
 396         }
 397
 398         # Snagged from OAuthServer
 399
 400         function check_version($req) {
 401                 $version = $req->get_parameter("oauth_version");
 402                 if (!$version) {
 403                         $version = 1.0;
 404                 }
 405                 if ($version != 1.0) {
 406                         throw new OAuthException("OAuth version '$version' not supported");
 407                 }
 408                 return $version;
 409         }
 410
 411         # Snagged from OAuthServer
 412
 413         function get_consumer($datastore, $req) {
 414                 $consumer_key = @$req->get_parameter("oauth_consumer_key");
 415                 if (!$consumer_key) {
 416                         throw new OAuthException("Invalid consumer key");
 417                 }
 418
 419                 $consumer = $datastore->lookup_consumer($consumer_key);
 420                 if (!$consumer) {
 421                         throw new OAuthException("Invalid consumer");
 422                 }
 423                 return $consumer;
 424         }
 425
 426         # Mostly cadged from OAuthServer
 427
 428         function get_token(&$req, $consumer, $datastore) {/*{{{*/
 429                 $token_field = @$req->get_parameter('oauth_token');
 430                 $token = $datastore->lookup_token($consumer, 'request', $token_field);
 431                 if (!$token) {
 432                         throw new OAuthException("Invalid $token_type token: $token_field");
 433                 }
 434                 return $token;
 435         }
 436
 437         function check_timestamp(&$req) {
 438                 $timestamp = @$req->get_parameter('oauth_timestamp');
 439                 $now = time();
 440                 if ($now - $timestamp > TIMESTAMP_THRESHOLD) {
 441                         throw new OAuthException("Expired timestamp, yours $timestamp, ours $now");
 442                 }
 443         }
 444
 445         # NOTE: don't call twice on the same request; will fail!
 446         function check_nonce(&$datastore, &$req, $consumer, $token) {
 447                 $timestamp = @$req->get_parameter('oauth_timestamp');
 448                 $nonce = @$req->get_parameter('oauth_nonce');
 449                 $found = $datastore->lookup_nonce($consumer, $token, $nonce, $timestamp);
 450                 if ($found) {
 451                         throw new OAuthException("Nonce already used");
 452                 }
 453                 return true;
 454         }
 455
 456         function check_signature(&$req, $consumer, $token) {
 457                 $signature_method = $this->get_signature_method($req);
 458                 $signature = $req->get_parameter('oauth_signature');
 459                 $valid_sig = $signature_method->check_signature($req,
 460                                                                                                                 $consumer,
 461                                                                                                                 $token,
 462                                                                                                                 $signature);
 463                 if (!$valid_sig) {
 464                         throw new OAuthException("Invalid signature");
 465                 }
 466         }
 467
 468         function get_signature_method(&$req) {
 469                 $signature_method = @$req->get_parameter("oauth_signature_method");
 470                 if (!$signature_method) {
 471                         $signature_method = "PLAINTEXT";
 472                 }
 473                 if ($signature_method != 'HMAC-SHA1') {
 474                         throw new OAuthException("Signature method '$signature_method' not supported.");
 475                 }
 476                 return omb_hmac_sha1();
 477         }
 478 }