138 lines
5 KiB
TypeScript
138 lines
5 KiB
TypeScript
import * as Bull from 'bull';
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import * as httpSignature from 'http-signature';
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import perform from '../../remote/activitypub/perform';
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import Logger from '../../services/logger';
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import { registerOrFetchInstanceDoc } from '../../services/register-or-fetch-instance-doc';
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import { Instances } from '../../models';
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import { instanceChart } from '../../services/chart';
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import { fetchMeta } from '../../misc/fetch-meta';
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import { toPuny, extractDbHost } from '../../misc/convert-host';
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import { getApId } from '../../remote/activitypub/type';
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import { fetchInstanceMetadata } from '../../services/fetch-instance-metadata';
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import { InboxJobData } from '..';
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import DbResolver from '../../remote/activitypub/db-resolver';
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import { resolvePerson } from '../../remote/activitypub/models/person';
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import { LdSignature } from '../../remote/activitypub/misc/ld-signature';
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const logger = new Logger('inbox');
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// ユーザーのinboxにアクティビティが届いた時の処理
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export default async (job: Bull.Job<InboxJobData>): Promise<string> => {
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const signature = job.data.signature; // HTTP-signature
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const activity = job.data.activity;
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//#region Log
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const info = Object.assign({}, activity);
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delete info['@context'];
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logger.debug(JSON.stringify(info, null, 2));
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//#endregion
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const host = toPuny(new URL(signature.keyId).hostname);
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// ブロックしてたら中断
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const meta = await fetchMeta();
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if (meta.blockedHosts.includes(host)) {
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return `Blocked request: ${host}`;
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}
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const keyIdLower = signature.keyId.toLowerCase();
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if (keyIdLower.startsWith('acct:')) {
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return `Old keyId is no longer supported. ${keyIdLower}`;
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}
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// TDOO: キャッシュ
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const dbResolver = new DbResolver();
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// HTTP-Signature keyIdを元にDBから取得
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let authUser = await dbResolver.getAuthUserFromKeyId(signature.keyId);
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// keyIdでわからなければ、activity.actorを元にDBから取得 || activity.actorを元にリモートから取得
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if (authUser == null) {
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try {
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authUser = await dbResolver.getAuthUserFromApId(getApId(activity.actor));
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} catch (e) {
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// 対象が4xxならスキップ
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if (e.statusCode >= 400 && e.statusCode < 500) {
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return `skip: Ignored deleted actors on both ends ${activity.actor} - ${e.statusCode}`;
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}
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throw `Error in actor ${activity.actor} - ${e.statusCode || e}`;
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}
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}
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// それでもわからなければ終了
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if (authUser == null) {
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return `skip: failed to resolve user`;
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}
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// HTTP-Signatureの検証
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const httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
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// また、signatureのsignerは、activity.actorと一致する必要がある
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if (!httpSignatureValidated || authUser.user.uri !== activity.actor) {
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// 一致しなくても、でもLD-Signatureがありそうならそっちも見る
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if (activity.signature) {
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if (activity.signature.type !== 'RsaSignature2017') {
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return `skip: unsupported LD-signature type ${activity.signature.type}`;
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}
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// activity.signature.creator: https://example.oom/users/user#main-key
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// みたいになっててUserを引っ張れば公開キーも入ることを期待する
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if (activity.signature.creator) {
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const candicate = activity.signature.creator.replace(/#.*/, '');
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await resolvePerson(candicate).catch(() => null);
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}
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// keyIdからLD-Signatureのユーザーを取得
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authUser = await dbResolver.getAuthUserFromKeyId(activity.signature.creator);
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if (authUser == null) {
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return `skip: LD-Signatureのユーザーが取得できませんでした`;
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}
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// LD-Signature検証
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const ldSignature = new LdSignature();
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const verified = await ldSignature.verifyRsaSignature2017(activity, authUser.key.keyPem).catch(() => false);
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if (!verified) {
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return `skip: LD-Signatureの検証に失敗しました`;
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}
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// もう一度actorチェック
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if (authUser.user.uri !== activity.actor) {
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return `skip: LD-Signature user(${authUser.user.uri}) !== activity.actor(${activity.actor})`;
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}
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// ブロックしてたら中断
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const ldHost = extractDbHost(authUser.user.uri);
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if (meta.blockedHosts.includes(ldHost)) {
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return `Blocked request: ${ldHost}`;
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}
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} else {
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return `skip: http-signature verification failed and no LD-Signature. keyId=${signature.keyId}`;
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}
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}
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// activity.idがあればホストが署名者のホストであることを確認する
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if (typeof activity.id === 'string') {
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const signerHost = extractDbHost(authUser.user.uri!);
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const activityIdHost = extractDbHost(activity.id);
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if (signerHost !== activityIdHost) {
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return `skip: signerHost(${signerHost}) !== activity.id host(${activityIdHost}`;
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}
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}
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// Update stats
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registerOrFetchInstanceDoc(authUser.user.host).then(i => {
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Instances.update(i.id, {
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latestRequestReceivedAt: new Date(),
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lastCommunicatedAt: new Date(),
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isNotResponding: false
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});
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fetchInstanceMetadata(i);
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instanceChart.requestReceived(i.host);
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});
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// アクティビティを処理
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await perform(authUser.user, activity);
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return `ok`;
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};
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