diff options
Diffstat (limited to 'mod/salmon.php')
| -rw-r--r-- | mod/salmon.php | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/mod/salmon.php b/mod/salmon.php deleted file mode 100644 index 1e16f9d14..000000000 --- a/mod/salmon.php +++ /dev/null @@ -1,229 +0,0 @@ -<?php - - -// There is a lot of debug stuff in here because this is quite a -// complicated process to try and sort out. - -require_once('include/salmon.php'); -require_once('include/crypto.php'); -require_once('library/simplepie/simplepie.inc'); - -function salmon_return($val) { - - if($val >= 400) - $err = 'Error'; - if($val >= 200 && $val < 300) - $err = 'OK'; - - logger('mod-salmon returns ' . $val); - header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err); - killme(); - -} - -function salmon_post(&$a) { - - $xml = file_get_contents('php://input'); - - logger('mod-salmon: new salmon ' . $xml, LOGGER_DATA); - - $nick = (($a->argc > 1) ? notags(trim($a->argv[1])) : ''); - $mentions = (($a->argc > 2 && $a->argv[2] === 'mention') ? true : false); - - $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' AND `account_expired` = 0 LIMIT 1", - dbesc($nick) - ); - if(! count($r)) - http_status_exit(500); - - $importer = $r[0]; - - // parse the xml - - $dom = simplexml_load_string($xml,'SimpleXMLElement',0,NAMESPACE_SALMON_ME); - - // figure out where in the DOM tree our data is hiding - - if($dom->provenance->data) - $base = $dom->provenance; - elseif($dom->env->data) - $base = $dom->env; - elseif($dom->data) - $base = $dom; - - if(! $base) { - logger('mod-salmon: unable to locate salmon data in xml '); - http_status_exit(400); - } - - // Stash the signature away for now. We have to find their key or it won't be good for anything. - - - $signature = base64url_decode($base->sig); - - // unpack the data - - // strip whitespace so our data element will return to one big base64 blob - $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data); - - // stash away some other stuff for later - - $type = $base->data[0]->attributes()->type[0]; - $keyhash = $base->sig[0]->attributes()->keyhash[0]; - $encoding = $base->encoding; - $alg = $base->alg; - - // Salmon magic signatures have evolved and there is no way of knowing ahead of time which - // flavour we have. We'll try and verify it regardless. - - $stnet_signed_data = $data; - - $signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg); - - $compliant_format = str_replace('=','',$signed_data); - - - // decode the data - $data = base64url_decode($data); - - // Remove the xml declaration - $data = preg_replace('/\<\?xml[^\?].*\?\>/','',$data); - - // Create a fake feed wrapper so simplepie doesn't choke - - $tpl = get_markup_template('fake_feed.tpl'); - - $base = substr($data,strpos($data,'<entry')); - - $feedxml = $tpl . $base . '</feed>'; - - logger('mod-salmon: Processed feed: ' . $feedxml); - - // Now parse it like a normal atom feed to scrape out the author URI - - $feed = new SimplePie(); - $feed->set_raw_data($feedxml); - $feed->enable_order_by_date(false); - $feed->init(); - - logger('mod-salmon: Feed parsed.'); - - if($feed->get_item_quantity()) { - foreach($feed->get_items() as $item) { - $author = $item->get_author(); - $author_link = unxmlify($author->get_link()); - break; - } - } - - if(! $author_link) { - logger('mod-salmon: Could not retrieve author URI.'); - http_status_exit(400); - } - - // Once we have the author URI, go to the web and try to find their public key - - logger('mod-salmon: Fetching key for ' . $author_link ); - - - $key = get_salmon_key($author_link,$keyhash); - - if(! $key) { - logger('mod-salmon: Could not retrieve author key.'); - http_status_exit(400); - } - - $key_info = explode('.',$key); - - $m = base64url_decode($key_info[1]); - $e = base64url_decode($key_info[2]); - - logger('mod-salmon: key details: ' . print_r($key_info,true), LOGGER_DEBUG); - - $pubkey = metopem($m,$e); - - // We should have everything we need now. Let's see if it verifies. - - $verify = rsa_verify($compliant_format,$signature,$pubkey); - - if(! $verify) { - logger('mod-salmon: message did not verify using protocol. Trying padding hack.'); - $verify = rsa_verify($signed_data,$signature,$pubkey); - } - - if(! $verify) { - logger('mod-salmon: message did not verify using padding. Trying old statusnet hack.'); - $verify = rsa_verify($stnet_signed_data,$signature,$pubkey); - } - - if(! $verify) { - logger('mod-salmon: Message did not verify. Discarding.'); - http_status_exit(400); - } - - logger('mod-salmon: Message verified.'); - - - /* - * - * If we reached this point, the message is good. Now let's figure out if the author is allowed to send us stuff. - * - */ - - $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND ( `url` = '%s' OR `alias` = '%s' ) - AND `uid` = %d LIMIT 1", - dbesc(NETWORK_OSTATUS), - dbesc($author_link), - dbesc($author_link), - intval($importer['uid']) - ); - if(! count($r)) { - logger('mod-salmon: Author unknown to us.'); - if(get_pconfig($importer['uid'],'system','ostatus_autofriend')) { - require_once('include/follow.php'); - $result = new_contact($importer['uid'],$author_link); - if($result['success']) { - $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND ( `url` = '%s' OR `alias` = '%s' ) - AND `uid` = %d LIMIT 1", - dbesc(NETWORK_OSTATUS), - dbesc($author_link), - dbesc($author_link), - intval($importer['uid']) - ); - } - } - } - - // is this a follower? Or have we ignored the person? - // If so we can not accept this post. - - if((count($r)) && (($r[0]['readonly']) || ($r[0]['rel'] == CONTACT_IS_FOLLOWER) || ($r[0]['blocked']))) { - logger('mod-salmon: Ignoring this author.'); - http_status_exit(202); - // NOTREACHED - } - - require_once('include/items.php'); - - // Placeholder for hub discovery. We shouldn't find any hubs - // since we supplied the fake feed header - and it doesn't have any. - - $hub = ''; - - /** - * - * anti-spam measure: consume_feed will accept a follow activity from - * this person (and nothing else) if there is no existing contact record. - * - */ - - $contact_rec = ((count($r)) ? $r[0] : null); - - consume_feed($feedxml,$importer,$contact_rec,$hub); - - http_status_exit(200); -} - - - - |