mirror of
https://github.com/pixelfed/pixelfed.git
synced 2024-11-10 08:44:49 +00:00
411 lines
12 KiB
PHP
411 lines
12 KiB
PHP
<?php
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namespace App\Util\ActivityPub;
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use Cache, Purify, Storage, Request, Validator;
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use App\{
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Activity,
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Follower,
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Like,
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Notification,
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Profile,
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Status
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};
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use Zttp\Zttp;
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use Carbon\Carbon;
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use GuzzleHttp\Client;
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use Illuminate\Http\File;
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use Illuminate\Validation\Rule;
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use App\Jobs\AvatarPipeline\CreateAvatar;
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use App\Jobs\RemoteFollowPipeline\RemoteFollowImportRecent;
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use App\Jobs\ImageOptimizePipeline\{ImageOptimize,ImageThumbnail};
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use App\Jobs\StatusPipeline\NewStatusPipeline;
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use HttpSignatures\{GuzzleHttpSignatures, KeyStore, Context, Verifier};
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use Symfony\Bridge\PsrHttpMessage\Factory\DiactorosFactory;
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class Helpers {
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public static function validateObject($data)
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{
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// todo: undo
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$verbs = ['Create', 'Announce', 'Like', 'Follow', 'Delete', 'Accept', 'Reject'];
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$valid = Validator::make($data, [
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'type' => [
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'required',
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Rule::in($verbs)
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],
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'id' => 'required|string',
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'actor' => 'required|string',
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'object' => 'required',
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'object.type' => 'required_if:type,Create',
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'object.attachment' => 'required_if:type,Create',
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'object.attributedTo' => 'required_if:type,Create',
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'published' => 'required_if:type,Create|date'
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])->passes();
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return $valid;
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}
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public static function verifyAttachments($data)
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{
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if(!isset($data['object']) || empty($data['object'])) {
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$data = ['object'=>$data];
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}
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$activity = $data['object'];
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$mediaTypes = ['Document', 'Image', 'Video'];
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$mimeTypes = ['image/jpeg', 'image/png', 'video/mp4'];
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if(!isset($activity['attachment']) || empty($activity['attachment'])) {
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return false;
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}
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$attachment = $activity['attachment'];
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$valid = Validator::make($attachment, [
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'*.type' => [
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'required',
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'string',
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Rule::in($mediaTypes)
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],
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'*.url' => 'required|max:255',
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'*.mediaType' => [
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'required',
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'string',
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Rule::in($mimeTypes)
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],
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'*.name' => 'nullable|string|max:255'
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])->passes();
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return $valid;
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}
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public static function normalizeAudience($data, $localOnly = true)
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{
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if(!isset($data['to'])) {
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return;
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}
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$audience = [];
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$audience['to'] = [];
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$audience['cc'] = [];
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$scope = 'private';
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if(is_array($data['to']) && !empty($data['to'])) {
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foreach ($data['to'] as $to) {
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if($to == 'https://www.w3.org/ns/activitystreams#Public') {
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$scope = 'public';
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continue;
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}
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$url = $localOnly ? self::validateLocalUrl($to) : self::validateUrl($to);
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if($url != false) {
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array_push($audience['to'], $url);
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}
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}
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}
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if(is_array($data['cc']) && !empty($data['cc'])) {
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foreach ($data['cc'] as $cc) {
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if($cc == 'https://www.w3.org/ns/activitystreams#Public') {
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$scope = 'unlisted';
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continue;
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}
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$url = $localOnly ? self::validateLocalUrl($cc) : self::validateUrl($cc);
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if($url != false) {
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array_push($audience['cc'], $url);
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}
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}
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}
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$audience['scope'] = $scope;
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return $audience;
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}
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public static function userInAudience($profile, $data)
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{
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$audience = self::normalizeAudience($data);
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$url = $profile->permalink();
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return in_array($url, $audience);
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}
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public static function validateUrl($url)
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{
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$localhosts = [
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'127.0.0.1', 'localhost', '::1'
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];
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$valid = filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED|FILTER_FLAG_HOST_REQUIRED);
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if(in_array(parse_url($valid, PHP_URL_HOST), $localhosts)) {
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return false;
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}
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return $valid;
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}
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public static function validateLocalUrl($url)
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{
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$url = self::validateUrl($url);
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if($url) {
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$domain = config('pixelfed.domain.app');
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$host = parse_url($url, PHP_URL_HOST);
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$url = $domain === $host ? $url : false;
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return $url;
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}
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return false;
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}
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public static function zttpUserAgent()
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{
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return [
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'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
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'User-Agent' => 'PixelFedBot - https://pixelfed.org',
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];
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}
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public static function fetchFromUrl($url)
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{
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$res = Zttp::withHeaders(self::zttpUserAgent())->get($url);
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$res = json_decode($res->body(), true, 8);
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if(json_last_error() == JSON_ERROR_NONE) {
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return $res;
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} else {
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return false;
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}
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}
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public static function fetchProfileFromUrl($url)
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{
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return self::fetchFromUrl($url);
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}
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public static function statusFirstOrFetch($url, $replyTo = true)
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{
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$url = self::validateUrl($url);
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if($url == false) {
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return;
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}
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$host = parse_url($url, PHP_URL_HOST);
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$local = config('pixelfed.domain.app') == $host ? true : false;
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if($local) {
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$id = (int) last(explode('/', $url));
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return Status::findOrFail($id);
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} else {
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$cached = Status::whereUrl($url)->first();
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if($cached) {
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return $cached;
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}
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$res = self::fetchFromUrl($url);
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if(!$res || empty($res)) {
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return;
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}
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if(isset($res['object'])) {
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$activity = $res;
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} else {
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$activity = ['object' => $res];
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}
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$profile = self::profileFirstOrNew($activity['object']['attributedTo']);
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if(isset($activity['object']['inReplyTo']) && !empty($activity['object']['inReplyTo']) && $replyTo == true) {
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$reply_to = self::statusFirstOrFetch($activity['object']['inReplyTo'], false);
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$reply_to = $reply_to->id;
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} else {
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$reply_to = null;
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}
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$status = new Status;
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$status->profile_id = $profile->id;
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$status->url = $url;
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$status->caption = strip_tags($res['content']);
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$status->rendered = Purify::clean($res['content']);
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$status->created_at = Carbon::parse($res['published']);
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$status->in_reply_to_id = $reply_to;
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$status->local = false;
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$status->save();
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self::importNoteAttachment($res, $status);
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return $status;
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}
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}
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public static function importNoteAttachment($data, Status $status)
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{
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if(self::verifyAttachments($data) == false) {
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return;
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}
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$attachments = isset($data['object']) ? $data['object']['attachment'] : $data['attachment'];
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$user = $status->profile;
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$monthHash = hash('sha1', date('Y').date('m'));
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$userHash = hash('sha1', $user->id.(string) $user->created_at);
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$storagePath = "public/m/{$monthHash}/{$userHash}";
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$allowed = explode(',', config('pixelfed.media_types'));
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foreach($attachments as $media) {
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$type = $media['mediaType'];
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$url = $media['url'];
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$valid = self::validateUrl($url);
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if(in_array($type, $allowed) == false || $valid == false) {
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continue;
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}
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$info = pathinfo($url);
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// pleroma attachment fix
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$url = str_replace(' ', '%20', $url);
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$img = file_get_contents($url, false, stream_context_create(['ssl' => ["verify_peer"=>false,"verify_peer_name"=>false]]));
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$file = '/tmp/'.str_random(16).$info['basename'];
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file_put_contents($file, $img);
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$fdata = new File($file);
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$path = Storage::putFile($storagePath, $fdata, 'public');
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$media = new Media();
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$media->status_id = $status->id;
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$media->profile_id = $status->profile_id;
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$media->user_id = null;
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$media->media_path = $path;
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$media->size = $fdata->getSize();
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$media->mime = $fdata->getMimeType();
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$media->save();
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ImageThumbnail::dispatch($media);
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ImageOptimize::dispatch($media);
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unlink($file);
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}
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return;
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}
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public static function profileFirstOrNew($url, $runJobs = false)
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{
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$res = self::fetchProfileFromUrl($url);
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$domain = parse_url($res['url'], PHP_URL_HOST);
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$username = $res['preferredUsername'];
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$remoteUsername = "@{$username}@{$domain}";
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$profile = Profile::whereRemoteUrl($res['url'])->first();
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if(!$profile) {
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$profile = new Profile;
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$profile->domain = $domain;
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$profile->username = $remoteUsername;
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$profile->name = strip_tags($res['name']);
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$profile->bio = Purify::clean($res['summary']);
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$profile->sharedInbox = isset($res['endpoints']) && isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : null;
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$profile->inbox_url = $res['inbox'];
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$profile->outbox_url = $res['outbox'];
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$profile->remote_url = $res['url'];
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$profile->public_key = $res['publicKey']['publicKeyPem'];
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$profile->key_id = $res['publicKey']['id'];
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$profile->save();
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if($runJobs == true) {
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RemoteFollowImportRecent::dispatch($res, $profile);
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CreateAvatar::dispatch($profile);
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}
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}
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return $profile;
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}
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public static function sendSignedObject($senderProfile, $url, $body)
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{
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$profile = $senderProfile;
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$keyId = $profile->keyId();
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$privateKey = openssl_pkey_get_private($profile->private_key);
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$date = date('D, d M Y h:i:s').' GMT';
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$host = parse_url($url, PHP_URL_HOST);
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$headers = [
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'(request-target)' => 'post '.parse_url($url, PHP_URL_PATH),
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'Date' => $date,
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'Host' => $host,
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'Content-Type' => 'application/activity+json',
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];
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if($body) {
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$payload = is_string($body) ? $body : json_encode($body);
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$digest = base64_encode(hash('sha256', $payload, true));
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$headers['Digest'] = 'SHA-256=' . $digest;
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}
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$stringToSign = self::_headersToSigningString($headers);
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$signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
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openssl_sign($stringToSign, $signature, $privateKey, OPENSSL_ALGO_SHA256);
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openssl_free_key($privateKey);
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$signature = base64_encode($signature);
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$signatureHeader = 'keyId="'.$keyId.'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
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unset($headers['(request-target)']);
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$headers['Signature'] = $signatureHeader;
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Zttp::withHeaders($headers)->post($url, $body);
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return;
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}
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private static function _headersToSigningString($headers) {
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return implode("\n", array_map(function($k, $v){
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return strtolower($k).': '.$v;
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}, array_keys($headers), $headers));
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}
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public static function validateSignature($request, $payload = null)
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{
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$date = Carbon::parse($request['date']);
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$min = Carbon::now()->subHours(13);
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$max = Carbon::now()->addHours(13);
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if($date->gt($min) == false || $date->lt($max) == false) {
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return false;
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}
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$json = json_encode($payload);
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$digest = base64_encode(hash('sha256', $json, true));
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$parts = explode(',', $request['signature']);
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$signatureData = [];
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foreach($parts as $part) {
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if(preg_match('/(.+)="(.+)"/', $part, $match)) {
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$signatureData[$match[1]] = $match[2];
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}
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}
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$actor = $payload['actor'];
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$profile = self::profileFirstOrNew($actor, true);
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if(!$profile) {
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return false;
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}
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$publicKey = $profile->public_key;
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$path = $request['path'];
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$host = $request['host'];
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$signingString = "(request-target): post {$path}".PHP_EOL.
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"host: {$host}".PHP_EOL.
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"date: {$request['date']}".PHP_EOL.
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"digest: {$request['digest']}".PHP_EOL.
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"content-type: {$request['contentType']}";
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$verified = openssl_verify($signingString, base64_decode($signatureData['signature']), $publicKey, OPENSSL_ALGO_SHA256);
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return (bool) $verified;
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}
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public static function fetchPublicKey()
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{
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$profile = $this->profile;
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$is_url = $this->is_url;
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$valid = $this->validateUrl();
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if (!$valid) {
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throw new \Exception('Invalid URL provided');
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}
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if ($is_url && isset($profile->public_key) && $profile->public_key) {
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return $profile->public_key;
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}
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try {
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$url = $this->profile;
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$res = Zttp::timeout(30)->withHeaders([
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'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
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'User-Agent' => 'PixelFedBot v0.1 - https://pixelfed.org',
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])->get($url);
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$actor = json_decode($res->getBody(), true);
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} catch (Exception $e) {
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throw new Exception('Unable to fetch public key');
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}
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if($actor['publicKey']['owner'] != $profile) {
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throw new Exception('Invalid key match');
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}
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$this->public_key = $actor['publicKey']['publicKeyPem'];
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$this->key_id = $actor['publicKey']['id'];
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return $this;
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}
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} |