X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=mod%2Freceive.php;h=95a51016757da46217f277e4b641799c43b1ec2c;hb=efbdb57f926dc840a162ac960f5a1f3b0fdf0353;hp=6e36109b3b880114ea39f7b5434b228c1fa3ed61;hpb=020deefba613327a1d8875ba7f2cf9a750be42dd;p=friendica.git diff --git a/mod/receive.php b/mod/receive.php index 6e36109b3b..95a5101675 100644 --- a/mod/receive.php +++ b/mod/receive.php @@ -5,211 +5,72 @@ */ - require_once('include/salmon.php'); -require_once('library/simplepie/simplepie.inc'); - -function receive_return($val) { - - if($val >= 400) - $err = 'Error'; - if($val >= 200 && $val < 300) - $err = 'OK'; +require_once('include/crypto.php'); +require_once('include/diaspora.php'); - logger('mod-diaspora returns ' . $val); - header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err); - killme(); - -} function receive_post(&$a) { - if($a->argc != 3 || $a->argv[1] !== 'users') - receive_return(500); - - $guid = $a->argv[2]; - - $r = q("SELECT * FROM `user` WHERE `guid` = '%s' LIMIT 1", - dbesc($guid) - ); - if(! count($r)) - salmon_return(500); - - $importer = $r[0]; - - $xml = $_POST['xml']; - - logger('mod-diaspora: new salmon ' . $xml, LOGGER_DATA); - - if(! $xml) - receive_return(500); - - // 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-diaspora: unable to locate salmon data in xml '); - receive_return(400); + $enabled = intval(get_config('system','diaspora_enabled')); + if(! $enabled) { + logger('mod-diaspora: disabled'); + http_status_exit(500); } - // 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; - - $signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg); - - // decode the data - $data = base64url_decode($data); + $public = false; - // 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,''; - - logger('mod-diaspora: 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); - $feed->init(); - - logger('mod-diaspora: Feed parsed.'); - - if($feed->get_item_quantity()) { - foreach($feed->get_items() as $item) { - $author = $item->get_author(); - $author_link = unxmlify($author->get_link()); - break; - } - } - - if(! $author_link) { - logger('mod-diaspora: Could not retrieve author URI.'); - receive_return(400); + if(($a->argc == 2) && ($a->argv[1] === 'public')) { + $public = true; } + else { - // Once we have the author URI, go to the web and try to find their public key + if($a->argc != 3 || $a->argv[1] !== 'users') + http_status_exit(500); - logger('mod-salmon: Fetching key for ' . $author_link ); + $guid = $a->argv[2]; + $r = q("SELECT * FROM `user` WHERE `guid` = '%s' AND `account_expired` = 0 AND `account_removed` = 0 LIMIT 1", + dbesc($guid) + ); + if(! count($r)) + http_status_exit(500); - $key = get_salmon_key($author_link,$keyhash); - - if(! $key) { - logger('mod-salmon: Could not retrieve author key.'); - receive_return(400); + $importer = $r[0]; } - // Setup RSA stuff to verify the signature - - set_include_path(get_include_path() . PATH_SEPARATOR . 'library' . PATH_SEPARATOR . 'phpsec'); + // It is an application/x-www-form-urlencoded - require_once('library/phpsec/Crypt/RSA.php'); + logger('mod-diaspora: receiving post', LOGGER_DEBUG); - $key_info = explode('.',$key); + $xml = urldecode($_POST['xml']); - $m = base64url_decode($key_info[1]); - $e = base64url_decode($key_info[2]); - - logger('mod-salmon: key details: ' . print_r($key_info,true)); - - $rsa = new CRYPT_RSA(); - $rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1; - $rsa->setHash('sha256'); - - $rsa->modulus = new Math_BigInteger($m, 256); - $rsa->k = strlen($rsa->modulus->toBytes()); - $rsa->exponent = new Math_BigInteger($e, 256); - - $verify = $rsa->verify($signed_data,$signature); + logger('mod-diaspora: new salmon ' . $xml, LOGGER_DATA); - if(! $verify) { - logger('mod-diaspora: Message did not verify. Discarding.'); - receive_return(400); - } + if(! $xml) + http_status_exit(500); - logger('mod-diaspora: Message verified.'); - - /* decrypt the sucker */ - /* - // TODO - */ - - /* - * - * If we reached this point, the message is good. Now let's figure out if the author is allowed to send us stuff. - * - */ - - $r = q("SELECT * FROM `contact` WHERE `network` = 'dspr' AND ( `url` = '%s' OR `alias` = '%s') - AND `uid` = %d LIMIT 1", - dbesc($author_link), - dbesc($author_link), - intval($importer['uid']) - ); - if(! count($r)) { - logger('mod-diaspora: Author unknown to us.'); - } - - // is this a follower? Or have we ignored the person? - // If so we can not accept this post. - - if((count($r)) && (($r[0]['readonly']) || ($r[0]['rel'] == REL_VIP) || ($r[0]['blocked']))) { - logger('mod-diaspora: Ignoring this author.'); - receive_return(202); - // NOTREACHED - } + logger('mod-diaspora: message is okay', LOGGER_DEBUG); - require_once('include/items.php'); + $msg = diaspora_decode($importer,$xml); - // Placeholder for hub discovery. We shouldn't find any hubs - // since we supplied the fake feed header - and it doesn't have any. + logger('mod-diaspora: decoded', LOGGER_DEBUG); - $hub = ''; + logger('mod-diaspora: decoded msg: ' . print_r($msg,true), LOGGER_DATA); - /** - * - * anti-spam measure: consume_feed will accept a follow activity from - * this person (and nothing else) if there is no existing contact record. - * - */ + if(! is_array($msg)) + http_status_exit(500); - $contact_rec = ((count($r)) ? $r[0] : null); + logger('mod-diaspora: dispatching', LOGGER_DEBUG); - consume_feed($feedxml,$importer,$contact_rec,$hub); + $ret = 0; + if($public) + diaspora_dispatch_public($msg); + else + $ret = diaspora_dispatch($importer,$msg); - receive_return(200); + http_status_exit(($ret) ? $ret : 200); + // NOTREACHED } - - -