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activitypub: centrally check id matches URL in resolver

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This makes some duplicated checks in models/note and models/person
unnecessary.
This commit is contained in:
Johann150 2022-12-15 00:29:39 +01:00
parent 6256ddbd30
commit 3582fd8260
Signed by untrusted user: Johann150
GPG key ID: 9EE6577A2A06F8F1
1 changed files with 13 additions and 6 deletions
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19
packages/backend/src/remote/activitypub/resolver.ts
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@ -11,7 +11,7 @@ import { renderActivity } from '@/remote/activitypub/renderer/index.js';
import renderFollow from '@/remote/activitypub/renderer/follow.js';
import { shouldBlockInstance } from '@/misc/should-block-instance.js';
import { signedGet } from './request.js';
import { IObject, isCollectionOrOrderedCollection, ICollection, IOrderedCollection } from './type.js';
import { getApId, IObject, isCollectionOrOrderedCollection, ICollection, IOrderedCollection } from './type.js';
import { parseUri } from './db-resolver.js';
/**
@ -84,11 +84,18 @@ export class Resolver {
const object = await signedGet(value, this.user);
if (object == null || (
Array.isArray(object['@context']) ?
!(object['@context'] as unknown[]).includes('https://www.w3.org/ns/activitystreams') :
object['@context'] !== 'https://www.w3.org/ns/activitystreams'
)) {
if (
object == null
|| // check that this is an activitypub object by looking at the @context
(
Array.isArray(object['@context']) ?
!(object['@context'] as unknown[]).includes('https://www.w3.org/ns/activitystreams') :
object['@context'] !== 'https://www.w3.org/ns/activitystreams'
)
// Did we actually get the object that corresponds to the canonical URL?
// Does the host we requested stuff from actually correspond to the host that owns the activity?
|| !(getApId(object) == null || getApId(object) === value)
) {
throw new Error('invalid response');
}