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1 | import { eachSeries } from 'async' | |
2 | import { NextFunction, Request, RequestHandler, Response } from 'express' | |
3 | import { ActivityPubSignature } from '../../shared' | |
4 | import { logger } from '../helpers/logger' | |
5 | import { isSignatureVerified } from '../helpers/peertube-crypto' | |
6 | import { ACCEPT_HEADERS, ACTIVITY_PUB } from '../initializers' | |
7 | import { getOrCreateActorAndServerAndModel } from '../lib/activitypub' | |
8 | import { ActorModel } from '../models/activitypub/actor' | |
9 | ||
10 | async function checkSignature (req: Request, res: Response, next: NextFunction) { | |
11 | const signatureObject: ActivityPubSignature = req.body.signature | |
12 | ||
13 | const [ creator ] = signatureObject.creator.split('#') | |
14 | ||
15 | logger.debug('Checking signature of actor %s...', creator) | |
16 | ||
17 | let actor: ActorModel | |
18 | try { | |
19 | actor = await getOrCreateActorAndServerAndModel(creator) | |
20 | } catch (err) { | |
21 | logger.error('Cannot create remote actor and check signature.', { err }) | |
22 | return res.sendStatus(403) | |
23 | } | |
24 | ||
25 | const verified = await isSignatureVerified(actor, req.body) | |
26 | if (verified === false) return res.sendStatus(403) | |
27 | ||
28 | res.locals.signature = { | |
29 | actor | |
30 | } | |
31 | ||
32 | return next() | |
33 | } | |
34 | ||
35 | function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) { | |
36 | return (req: Request, res: Response, next: NextFunction) => { | |
37 | const accepted = req.accepts(ACCEPT_HEADERS) | |
38 | if (accepted === false || ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS.indexOf(accepted) === -1) { | |
39 | return next() | |
40 | } | |
41 | ||
42 | logger.debug('ActivityPub request for %s.', req.url) | |
43 | ||
44 | if (Array.isArray(fun) === true) { | |
45 | return eachSeries(fun as RequestHandler[], (f, cb) => { | |
46 | f(req, res, cb) | |
47 | }, next) | |
48 | } | |
49 | ||
50 | return (fun as RequestHandler)(req, res, next) | |
51 | } | |
52 | } | |
53 | ||
54 | // --------------------------------------------------------------------------- | |
55 | ||
56 | export { | |
57 | checkSignature, | |
58 | executeIfActivityPub | |
59 | } |