From 9e315a75d8eef74073c33ee1b43cf18a484115fa Mon Sep 17 00:00:00 2001 From: Hypolite Petovan Date: Sun, 6 Nov 2022 20:40:10 -0500 Subject: [PATCH] Remove mod/salmon.php --- mod/salmon.php | 183 ------------------------------------------------- 1 file changed, 183 deletions(-) delete mode 100644 mod/salmon.php diff --git a/mod/salmon.php b/mod/salmon.php deleted file mode 100644 index a4eb3f81e..000000000 --- a/mod/salmon.php +++ /dev/null @@ -1,183 +0,0 @@ -. - * - */ - -use Friendica\App; -use Friendica\Core\Logger; -use Friendica\Core\Protocol; -use Friendica\Database\DBA; -use Friendica\DI; -use Friendica\Model\GServer; -use Friendica\Model\Post; -use Friendica\Protocol\ActivityNamespace; -use Friendica\Protocol\OStatus; -use Friendica\Protocol\Salmon; -use Friendica\Util\Crypto; -use Friendica\Util\Network; -use Friendica\Util\Strings; - -function salmon_post(App $a, $xml = '') { - - if (empty($xml)) { - $xml = Network::postdata(); - } - - Logger::debug('new salmon ' . $xml); - - $nick = trim(DI::args()->getArgv()[1] ?? ''); - - $importer = DBA::selectFirst('user', [], ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false]); - if (! DBA::isResult($importer)) { - throw new \Friendica\Network\HTTPException\InternalServerErrorException(); - } - - // parse the xml - - $dom = simplexml_load_string($xml,'SimpleXMLElement',0, ActivityNamespace::SALMON_ME); - - $base = null; - - // figure out where in the DOM tree our data is hiding - if (!empty($dom->provenance->data)) - $base = $dom->provenance; - elseif (!empty($dom->env->data)) - $base = $dom->env; - elseif (!empty($dom->data)) - $base = $dom; - - if (empty($base)) { - Logger::notice('unable to locate salmon data in xml'); - throw new \Friendica\Network\HTTPException\BadRequestException(); - } - - // Stash the signature away for now. We have to find their key or it won't be good for anything. - - - $signature = Strings::base64UrlDecode($base->sig); - - // unpack the data - - // strip whitespace so our data element will return to one big base64 blob - $data = str_replace([" ","\t","\r","\n"],["","","",""],$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 = $data . '.' . Strings::base64UrlEncode($type) . '.' . Strings::base64UrlEncode($encoding) . '.' . Strings::base64UrlEncode($alg); - - $compliant_format = str_replace('=', '', $signed_data); - - - // decode the data - $data = Strings::base64UrlDecode($data); - - $author = OStatus::salmonAuthor($data, $importer); - $author_link = $author["author-link"]; - - if(! $author_link) { - Logger::notice('Could not retrieve author URI.'); - throw new \Friendica\Network\HTTPException\BadRequestException(); - } - - // Once we have the author URI, go to the web and try to find their public key - - Logger::notice('Fetching key for ' . $author_link); - - $key = Salmon::getKey($author_link, $keyhash); - - if(! $key) { - Logger::notice('Could not retrieve author key.'); - throw new \Friendica\Network\HTTPException\BadRequestException(); - } - - $key_info = explode('.',$key); - - $m = Strings::base64UrlDecode($key_info[1]); - $e = Strings::base64UrlDecode($key_info[2]); - - Logger::info('key details', ['info' => $key_info]); - - $pubkey = Crypto::meToPem($m, $e); - - // We should have everything we need now. Let's see if it verifies. - - // Try GNU Social format - $verify = Crypto::rsaVerify($signed_data, $signature, $pubkey); - $mode = 1; - - if (! $verify) { - Logger::notice('message did not verify using protocol. Trying compliant format.'); - $verify = Crypto::rsaVerify($compliant_format, $signature, $pubkey); - $mode = 2; - } - - if (! $verify) { - Logger::notice('message did not verify using padding. Trying old statusnet format.'); - $verify = Crypto::rsaVerify($stnet_signed_data, $signature, $pubkey); - $mode = 3; - } - - if (! $verify) { - Logger::notice('Message did not verify. Discarding.'); - throw new \Friendica\Network\HTTPException\BadRequestException(); - } - - Logger::notice('Message verified with mode '.$mode); - - - /* - * - * If we reached this point, the message is good. Now let's figure out if the author is allowed to send us stuff. - * - */ - - $contact = DBA::selectFirst('contact', [], ["`network` IN (?, ?) AND (`nurl` = ? OR `alias` = ? OR `alias` = ?) AND `uid` = ?", - Protocol::OSTATUS, Protocol::DFRN, Strings::normaliseLink($author_link), $author_link, Strings::normaliseLink($author_link), $importer['uid']]); - - if (!empty($contact['gsid'])) { - GServer::setProtocol($contact['gsid'], Post\DeliveryData::OSTATUS); - } - - // Have we ignored the person? - // If so we can not accept this post. - - if (!empty($contact['blocked'])) { - Logger::notice('Ignoring this author.'); - throw new \Friendica\Network\HTTPException\AcceptedException(); - } - - // Placeholder for hub discovery. - $hub = ''; - - $contact = $contact ?: []; - - OStatus::import($data, $importer, $contact, $hub); - - throw new \Friendica\Network\HTTPException\OKException(); -}