actions/finishremotesubscribe.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 require_once('Auth/Yadis/Yadis.php');
  24
  25 class FinishremotesubscribeAction extends Action {
  26
  27         function handle($args) {
  28
  29                 parent::handle($args);
  30
  31                 if (common_logged_in()) {
  32                         common_user_error(_t('You can use the local subscription!'));
  33                     return;
  34                 }
  35
  36                 $nonce = $this->trimmed('nonce');
  37
  38                 if (!$omb) {
  39                         common_user_error(_t('No nonce returned!'));
  40                         return;
  41                 }
  42
  43                 $omb = $_SESSION[$nonce];
  44
  45                 if (!$omb) {
  46                         common_user_error(_t('Not expecting this response!'));
  47                         return;
  48                 }
  49
  50                 $req = OAuthRequest::from_request();
  51
  52                 $token = $req->get_parameter('oauth_token');
  53
  54                 # I think this is the success metric
  55
  56                 if ($token != $omb['token']) {
  57                         common_user_error(_t('Not authorized.'));
  58                         return;
  59                 }
  60
  61                 $version = $req->get_parameter('omb_version');
  62
  63                 if ($version != OMB_VERSION_01) {
  64                         common_user_error(_t('Unknown version of OMB protocol.'));
  65                         return;
  66                 }
  67
  68                 $nickname = $req->get_parameter('omb_listener_nickname');
  69
  70                 if (!$nickname) {
  71                         common_user_error(_t('No nickname provided by remote server.'));
  72                         return;
  73                 }
  74
  75                 $profile_url = $req->get_parameter('omb_listener_profile');
  76
  77                 if (!$profile_url) {
  78                         common_user_error(_t('No profile URL returned by server.'));
  79                         return;
  80                 }
  81
  82                 if (!Validate::uri($profile_url, array('allowed_schemes' => array('http', 'https')))) {
  83                         common_user_error(_t('Invalid profile URL returned by server.'));
  84                         return;
  85                 }
  86
  87                 $user = User::staticGet('uri', $omb['listenee']);
  88
  89                 if (!$user) {
  90                         common_user_error(_t('User being listened to doesn\'t exist.'));
  91                         return;
  92                 }
  93
  94                 $fullname = $req->get_parameter('omb_listener_fullname');
  95                 $homepage = $req->get_parameter('omb_listener_homepage');
  96                 $bio = $req->get_parameter('omb_listener_bio');
  97                 $location = $req->get_parameter('omb_listener_location');
  98                 $avatar_url = $req->get_parameter('omb_listener_avatar');
  99
 100                 list($newtok, $newsecret) = $this->access_token($omb);
 101
 102                 if (!$newtok || !$newsecret) {
 103                         common_user_error(_t('Couldn\'t convert request tokens to access tokens.'));
 104                         return;
 105                 }
 106
 107                 # XXX: possible attack point; subscribe and return someone else's profile URI
 108
 109                 $remote = Remote_profile::staticGet('uri', $omb['listener']);
 110
 111                 if ($remote) {
 112                         $exists = true;
 113                         $profile = Profile::staticGet($remote->id);
 114                         $orig_remote = clone($remote);
 115                         $orig_profile = clone($profile);
 116                         # XXX: compare current postNotice and updateProfile URLs to the ones
 117                         # stored in the DB to avoid (possibly...) above attack
 118                 } else {
 119                         $exists = false;
 120                         $remote = new Remote_profile();
 121                         $remote->uri = $omb['listener'];
 122                         $profile = new Profile();
 123                 }
 124
 125                 $profile->nickname = $nickname;
 126                 $profile->profileurl = $profile_url;
 127
 128                 if ($fullname) {
 129                         $profile->fullname = $fullname;
 130                 }
 131                 if ($homepage) {
 132                         $profile->homepage = $homepage;
 133                 }
 134                 if ($bio) {
 135                         $profile->bio = $bio;
 136                 }
 137                 if ($location) {
 138                         $profile->location = $location;
 139                 }
 140
 141                 if ($exists) {
 142                         $profile->update($orig_profile);
 143                 } else {
 144                         $profile->created = DB_DataObject_Cast::dateTime(); # current time
 145                         $id = $profile->insert();
 146                         $remote->id = $id;
 147                 }
 148
 149                 if ($avatar_url) {
 150                         $this->add_avatar($avatar_url);
 151                 }
 152
 153                 $remote->postnoticeurl = $omb[OMB_ENDPOINT_POSTNOTICE];
 154                 $remote->updateprofileurl = $omb[OMB_ENDPOINT_UPDATEPROFILE];
 155
 156                 if ($exists) {
 157                         $remote->update($orig_remote);
 158                 } else {
 159                         $remote->created = DB_DataObject_Cast::dateTime(); # current time
 160                         $remote->insert;
 161                 }
 162
 163                 $sub = new Subscription();
 164                 $sub->subscriber = $remote->id;
 165                 $sub->subscribed = $user->id;
 166                 $sub->token = $newtok;
 167                 $sub->secret = $newsecret;
 168                 $sub->created = DB_DataObject_Cast::dateTime(); # current time
 169
 170                 if (!$sub->insert()) {
 171                         common_user_error(_t('Couldn\'t insert new subscription.'));
 172                         return;
 173                 }
 174
 175                 # Clear the data
 176                 unset($_SESSION[$nonce]);
 177
 178                 # If we show subscriptions in reverse chron order, this should
 179                 # show up close to the top of the page
 180
 181                 common_redirect(common_local_url('subscribed', array('nickname' =>
 182                                                                                                                          $user->nickname)));
 183         }
 184
 185         function access_token($omb) {
 186
 187                 $con = omb_oauth_consumer();
 188                 $tok = new OAuthToken($omb['token'], $omb['secret']);
 189
 190                 $url = $omb[OAUTH_ENDPOINT_ACCESS][0];
 191
 192                 # XXX: Is this the right thing to do? Strip off GET params and make them
 193                 # POST params? Seems wrong to me.
 194
 195                 $parsed = parse_url($url);
 196                 $params = array();
 197                 parse_str($parsed['query'], $params);
 198
 199                 $req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);
 200
 201                 $req->set_parameter('omb_version', OMB_VERSION_01);
 202
 203                 # XXX: test to see if endpoint accepts this signature method
 204
 205                 $req->sign_request(omb_hmac_sha1(), $con, NULL);
 206
 207                 # We re-use this tool's fetcher, since it's pretty good
 208
 209                 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
 210                 $result = $fetcher->post($req->get_normalized_http_url(),
 211                                                                  $req->to_postdata());
 212
 213                 if ($result->status != 200) {
 214                         return NULL;
 215                 }
 216
 217                 parse_str($result->body, $return);
 218
 219                 return array($return['oauth_token'], $return['oauth_token_secret']);
 220         }
 221 }