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Merge pull request #12131 from MrPetovan/task/4090-move-mod-salmon

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Move mod/salmon.php to src/Module
This commit is contained in:
Michael Vogel 2022-11-07 14:55:02 +01:00 committed by GitHub
commit e6a5c172ce
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4 changed files with 262 additions and 197 deletions
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183
mod/salmon.php
View file

@ -1,183 +0,0 @@
<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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();
}

54
src/Module/DFRN/Notify.php
View file

@ -21,23 +21,40 @@
namespace Friendica\Module\DFRN;
use Friendica\App;
use Friendica\BaseModule;
use Friendica\Core\L10n;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\Database\Database;
use Friendica\DI;
use Friendica\Model\Contact;
use Friendica\Model\Conversation;
use Friendica\Model\User;
use Friendica\Module\OStatus\Salmon;
use Friendica\Module\Response;
use Friendica\Protocol\DFRN;
use Friendica\Protocol\Diaspora;
use Friendica\Util\Network;
use Friendica\Network\HTTPException;
use Friendica\Util\Profiler;
use Psr\Log\LoggerInterface;
/**
* DFRN Notify
*/
class Notify extends BaseModule
{
/** @var Database */
private $database;
public function __construct(Database $database, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
{
parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
$this->database = $database;
}
protected function post(array $request = [])
{
$postdata = Network::postdata();
@ -52,37 +69,46 @@ class Notify extends BaseModule
if (empty($user)) {
throw new \Friendica\Network\HTTPException\InternalServerErrorException();
}
self::dispatchPrivate($user, $postdata);
} elseif (!self::dispatchPublic($postdata)) {
require_once 'mod/salmon.php';
salmon_post(DI::app(), $postdata);
$this->dispatchPrivate($user, $postdata);
} elseif (!$this->dispatchPublic($postdata)) {
(new Salmon(
$this->database,
$this->l10n,
$this->baseUrl,
$this->args,
$this->logger,
$this->profiler,
$this->response,
$this->server,
$this->parameters
))->rawContent($request);
}
}
private static function dispatchPublic(string $postdata): bool
private function dispatchPublic(string $postdata): bool
{
$msg = Diaspora::decodeRaw($postdata, '', true);
if (!is_array($msg)) {
// We have to fail silently to be able to hand it over to the salmon parser
Logger::warning('Diaspora::decodeRaw() has failed for some reason.');
$this->logger->warning('Diaspora::decodeRaw() has failed for some reason.');
return false;
}
// Fetch the corresponding public contact
$contact_id = Contact::getIdForURL($msg['author']);
if (empty($contact_id)) {
Logger::notice('Contact not found', ['address' => $msg['author']]);
$this->logger->notice('Contact not found', ['address' => $msg['author']]);
System::xmlExit(3, 'Contact ' . $msg['author'] . ' not found');
}
// Fetch the importer (Mixture of sender and receiver)
$importer = DFRN::getImporter($contact_id);
if (empty($importer)) {
Logger::notice('Importer contact not found', ['address' => $msg['author']]);
$this->logger->notice('Importer contact not found', ['address' => $msg['author']]);
System::xmlExit(3, 'Contact ' . $msg['author'] . ' not found');
}
Logger::debug('Importing post with the public envelope.', ['transmitter' => $msg['author']]);
$this->logger->debug('Importing post with the public envelope.', ['transmitter' => $msg['author']]);
// Now we should be able to import it
$ret = DFRN::import($msg['message'], $importer, Conversation::PARCEL_DIASPORA_DFRN, Conversation::RELAY);
@ -91,7 +117,7 @@ class Notify extends BaseModule
return true;
}
private static function dispatchPrivate(array $user, string $postdata)
private function dispatchPrivate(array $user, string $postdata)
{
$msg = Diaspora::decodeRaw($postdata, $user['prvkey'] ?? '');
if (!is_array($msg)) {
@ -101,23 +127,23 @@ class Notify extends BaseModule
// Fetch the contact
$contact = Contact::getByURLForUser($msg['author'], $user['uid'], null, ['id', 'blocked', 'pending']);
if (empty($contact['id'])) {
Logger::notice('Contact not found', ['address' => $msg['author']]);
$this->logger->notice('Contact not found', ['address' => $msg['author']]);
System::xmlExit(3, 'Contact ' . $msg['author'] . ' not found');
}
if ($contact['pending'] || $contact['blocked']) {
Logger::notice('Contact is blocked or pending', ['address' => $msg['author'], 'contact' => $contact]);
$this->logger->notice('Contact is blocked or pending', ['address' => $msg['author'], 'contact' => $contact]);
System::xmlExit(3, 'Contact ' . $msg['author'] . ' not found');
}
// Fetch the importer (Mixture of sender and receiver)
$importer = DFRN::getImporter($contact['id'], $user['uid']);
if (empty($importer)) {
Logger::notice('Importer contact not found for user', ['uid' => $user['uid'], 'cid' => $contact['id'], 'address' => $msg['author']]);
$this->logger->notice('Importer contact not found for user', ['uid' => $user['uid'], 'cid' => $contact['id'], 'address' => $msg['author']]);
System::xmlExit(3, 'Contact ' . $msg['author'] . ' not found');
}
Logger::debug('Importing post with the private envelope.', ['transmitter' => $msg['author'], 'receiver' => $user['nickname']]);
$this->logger->debug('Importing post with the private envelope.', ['transmitter' => $msg['author'], 'receiver' => $user['nickname']]);
// Now we should be able to import it
$ret = DFRN::import($msg['message'], $importer, Conversation::PARCEL_DIASPORA_DFRN, Conversation::PUSH);

220
src/Module/OStatus/Salmon.php Normal file
View file

@ -0,0 +1,220 @@
<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Module\OStatus;
use Friendica\App;
use Friendica\Core\L10n;
use Friendica\Core\Protocol;
use Friendica\Database\Database;
use Friendica\Model\GServer;
use Friendica\Model\Post;
use Friendica\Module\Response;
use Friendica\Protocol\ActivityNamespace;
use Friendica\Protocol\OStatus;
use Friendica\Util\Crypto;
use Friendica\Util\Network;
use Friendica\Network\HTTPException;
use Friendica\Protocol\Salmon as SalmonProtocol;
use Friendica\Util\Profiler;
use Friendica\Util\Strings;
use Psr\Log\LoggerInterface;
/**
* Technical endpoint for the Salmon protocol
*/
class Salmon extends \Friendica\BaseModule
{
/** @var Database */
private $database;
public function __construct(Database $database, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
{
parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
$this->database = $database;
}
/**
* @param array $request
* @return void
* @throws HTTPException\AcceptedException
* @throws HTTPException\BadRequestException
* @throws HTTPException\InternalServerErrorException
* @throws HTTPException\OKException
* @throws \ImagickException
*/
protected function rawContent(array $request = [])
{
$xml = Network::postdata();
$this->logger->debug('New Salmon', ['nickname' => $this->parameters['nickname'], 'xml' => $xml]);
// Despite having a route with a mandatory nickname parameter, this method can also be called from
// \Friendica\Module\DFRN\Notify->post where the same parameter is optional 🤷‍
$nickname = $this->parameters['nickname'] ?? '';
$importer = $this->database->selectFirst('user', [], ['nickname' => $nickname, 'account_expired' => false, 'account_removed' => false]);
if (!$this->database->isResult($importer)) {
throw new 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)) {
$this->logger->notice('unable to locate salmon data in xml');
throw new 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) {
$this->logger->notice('Could not retrieve author URI.');
throw new HTTPException\BadRequestException();
}
// Once we have the author URI, go to the web and try to find their public key
$this->logger->notice('Fetching key for ' . $author_link);
$key = SalmonProtocol::getKey($author_link, $keyhash);
if (!$key) {
$this->logger->notice('Could not retrieve author key.');
throw new HTTPException\BadRequestException();
}
$key_info = explode('.', $key);
$m = Strings::base64UrlDecode($key_info[1]);
$e = Strings::base64UrlDecode($key_info[2]);
$this->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) {
$this->logger->notice('Message did not verify using protocol. Trying compliant format.');
$verify = Crypto::rsaVerify($compliant_format, $signature, $pubkey);
$mode = 2;
}
if (!$verify) {
$this->logger->notice('Message did not verify using padding. Trying old statusnet format.');
$verify = Crypto::rsaVerify($stnet_signed_data, $signature, $pubkey);
$mode = 3;
}
if (!$verify) {
$this->logger->notice('Message did not verify. Discarding.');
throw new HTTPException\BadRequestException();
}
$this->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 = $this->database->selectFirst(
'contact',
[],
[
"`network` IN (?, ?)
AND (`nurl` = ? OR `alias` = ? OR `alias` = ?)
AND `uid` = ?",
Protocol::OSTATUS, Protocol::DFRN,
Strings::normaliseLink($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'])) {
$this->logger->notice('Ignoring this author.');
throw new HTTPException\AcceptedException();
}
// Placeholder for hub discovery.
$hub = '';
$contact = $contact ?: [];
OStatus::import($data, $importer, $contact, $hub);
throw new HTTPException\OKException();
}
}

2
static/routes.config.php
View file

@ -553,6 +553,8 @@ return [
'/{sub1}/{sub2}/{url}' => [Module\Proxy::class, [R::GET]],
],
'/salmon/{nickname}' => [Module\OStatus\Salmon::class, [ R::POST]],
'/search' => [
'[/]' => [Module\Search\Index::class, [R::GET]],
'/acl' => [Module\Search\Acl::class, [R::GET, R::POST]],