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import { eachSeries } from 'async'
import { NextFunction, Request, RequestHandler, Response } from 'express'
import { ActivityPubSignature } from '../../shared'
import { logger } from '../helpers/logger'
import { isSignatureVerified } from '../helpers/peertube-crypto'
import { ACCEPT_HEADERS, ACTIVITY_PUB } from '../initializers'
import { getOrCreateActorAndServerAndModel } from '../lib/activitypub'
import { ActorModel } from '../models/activitypub/actor'
async function checkSignature (req: Request, res: Response, next: NextFunction) {
const signatureObject: ActivityPubSignature = req.body.signature
const [ creator ] = signatureObject.creator.split('#')
logger.debug('Checking signature of actor %s...', creator)
let actor: ActorModel
try {
actor = await getOrCreateActorAndServerAndModel(creator)
} catch (err) {
logger.error('Cannot create remote actor and check signature.', { err })
return res.sendStatus(403)
}
const verified = await isSignatureVerified(actor, req.body)
if (verified === false) return res.sendStatus(403)
res.locals.signature = {
actor
}
return next()
}
function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
return (req: Request, res: Response, next: NextFunction) => {
const accepted = req.accepts(ACCEPT_HEADERS)
if (accepted === false || ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS.indexOf(accepted) === -1) {
return next()
}
logger.debug('ActivityPub request for %s.', req.url)
if (Array.isArray(fun) === true) {
return eachSeries(fun as RequestHandler[], (f, cb) => {
f(req, res, cb)
}, next)
}
return (fun as RequestHandler)(req, res, next)
}
}
// ---------------------------------------------------------------------------
export {
checkSignature,
executeIfActivityPub
}
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