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merge: Fix activity verification after key rotation (!691)

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View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/691

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <github@yuugi.dev>
This commit is contained in:
Hazelnoot 2024-10-27 02:51:07 +00:00
commit 6e5cbedc75
3 changed files with 19 additions and 18 deletions
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12
packages/backend/src/core/activitypub/ApDbResolverService.ts
View file

@ -16,6 +16,7 @@ import type { MiLocalUser, MiRemoteUser } from '@/models/User.js';
import { getApId } from './type.js';
import { ApPersonService } from './models/ApPersonService.js';
import type { IObject } from './type.js';
import { ApLoggerService } from '@/core/activitypub/ApLoggerService.js';
export type UriParseResult = {
/** wether the URI was generated by us */
@ -53,6 +54,7 @@ export class ApDbResolverService implements OnApplicationShutdown {
private cacheService: CacheService,
private apPersonService: ApPersonService,
private apLoggerService: ApLoggerService,
) {
this.publicKeyCache = new MemoryKVCache<MiUserPublickey | null>(1000 * 60 * 60 * 12); // 12h
this.publicKeyByUserIdCache = new MemoryKVCache<MiUserPublickey | null>(1000 * 60 * 60 * 12); // 12h
@ -174,10 +176,16 @@ export class ApDbResolverService implements OnApplicationShutdown {
*/
@bindThis
public async refetchPublicKeyForApId(user: MiRemoteUser): Promise<MiUserPublickey | null> {
this.apLoggerService.logger.debug('Re-fetching public key for user', { userId: user.id, uri: user.uri });
await this.apPersonService.updatePerson(user.uri);
const key = await this.userPublickeysRepository.findOneBy({ userId: user.id });
if (key != null) {
await this.publicKeyByUserIdCache.set(user.id, key);
this.publicKeyByUserIdCache.set(user.id, key);
if (key) {
this.apLoggerService.logger.info('Re-fetched public key for user', { userId: user.id, uri: user.uri });
} else {
this.apLoggerService.logger.warn('Failed to re-fetch key for user', { userId: user.id, uri: user.uri });
}
return key;
}

9
packages/backend/src/queue/processors/InboxProcessorService.ts
View file

@ -118,19 +118,16 @@ export class InboxProcessorService implements OnApplicationShutdown {
// HTTP-Signatureの検証
let httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
// また、signatureのsignerは、activity.actorと一致する必要がある
if (!httpSignatureValidated || authUser.user.uri !== activity.actor) {
let renewKeyFailed = true;
// maybe they changed their key? refetch it
if (!httpSignatureValidated) {
authUser.key = await this.apDbResolverService.refetchPublicKeyForApId(authUser.user);
if (authUser.key != null) {
httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
renewKeyFailed = false;
}
}
// また、signatureのsignerは、activity.actorと一致する必要がある
if (!httpSignatureValidated || authUser.user.uri !== getApId(activity.actor)) {
// 一致しなくても、でもLD-Signatureがありそうならそっちも見る
const ldSignature = activity.signature;
if (ldSignature) {

6
packages/backend/src/server/ActivityPubServerService.ts
View file

@ -205,15 +205,11 @@ export class ActivityPubServerService {
let httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
if (!httpSignatureValidated) {
this.authlogger.info(`${logPrefix} failed to validate signature, re-fetching the key for ${authUser.user.uri}`);
// maybe they changed their key? refetch it
if (!httpSignatureValidated) {
authUser.key = await this.apDbResolverService.refetchPublicKeyForApId(authUser.user);
if (authUser.key != null) {
httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
} else {
this.authlogger.warn(`${logPrefix} failed to re-fetch key for ${authUser.user}`);
}
}