import { eachSeries } from 'async'
import { NextFunction, Request, RequestHandler, Response } from 'express'
import { ActivityPubSignature } from '../../shared'
-import { isSignatureVerified, logger } from '../helpers'
-import { database as db } from '../initializers'
-import { ACTIVITY_PUB } from '../initializers/constants'
-import { fetchRemoteAccount, saveAccountAndServerIfNotExist } from '../lib/activitypub/account'
+import { logger } from '../helpers/logger'
+import { isHTTPSignatureVerified, isJsonLDSignatureVerified, parseHTTPSignature } from '../helpers/peertube-crypto'
+import { ACCEPT_HEADERS, ACTIVITY_PUB, HTTP_SIGNATURE } from '../initializers'
+import { getOrCreateActorAndServerAndModel } from '../lib/activitypub'
+import { ActorModel } from '../models/activitypub/actor'
+import { loadActorUrlOrGetFromWebfinger } from '../helpers/webfinger'
async function checkSignature (req: Request, res: Response, next: NextFunction) {
- const signatureObject: ActivityPubSignature = req.body.signature
-
- logger.debug('Checking signature of account %s...', signatureObject.creator)
-
- let account = await db.Account.loadByUrl(signatureObject.creator)
+ try {
+ const httpSignatureChecked = await checkHttpSignature(req, res)
+ if (httpSignatureChecked !== true) return
- // We don't have this account in our database, fetch it on remote
- if (!account) {
- account = await fetchRemoteAccount(signatureObject.creator)
+ const actor: ActorModel = res.locals.signature.actor
- if (!account) {
- return res.sendStatus(403)
+ // Forwarded activity
+ const bodyActor = req.body.actor
+ const bodyActorId = bodyActor && bodyActor.id ? bodyActor.id : bodyActor
+ if (bodyActorId && bodyActorId !== actor.url) {
+ const jsonLDSignatureChecked = await checkJsonLDSignature(req, res)
+ if (jsonLDSignatureChecked !== true) return
}
- // Save our new account and its server in database
- await saveAccountAndServerIfNotExist(account)
+ return next()
+ } catch (err) {
+ logger.error('Error in ActivityPub signature checker.', err)
+ return res.sendStatus(403)
}
-
- const verified = await isSignatureVerified(account, req.body)
- if (verified === false) return res.sendStatus(403)
-
- res.locals.signature = {
- account
- }
-
- return next()
}
function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
return (req: Request, res: Response, next: NextFunction) => {
- if (req.header('Accept') !== ACTIVITY_PUB.ACCEPT_HEADER) {
+ 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)
export {
checkSignature,
- executeIfActivityPub
+ executeIfActivityPub,
+ checkHttpSignature
+}
+
+// ---------------------------------------------------------------------------
+
+async function checkHttpSignature (req: Request, res: Response) {
+ // FIXME: mastodon does not include the Signature scheme
+ const sig = req.headers[HTTP_SIGNATURE.HEADER_NAME] as string
+ if (sig && sig.startsWith('Signature ') === false) req.headers[HTTP_SIGNATURE.HEADER_NAME] = 'Signature ' + sig
+
+ const parsed = parseHTTPSignature(req)
+
+ const keyId = parsed.keyId
+ if (!keyId) {
+ res.sendStatus(403)
+ return false
+ }
+
+ logger.debug('Checking HTTP signature of actor %s...', keyId)
+
+ let [ actorUrl ] = keyId.split('#')
+ if (actorUrl.startsWith('acct:')) {
+ actorUrl = await loadActorUrlOrGetFromWebfinger(actorUrl.replace(/^acct:/, ''))
+ }
+
+ const actor = await getOrCreateActorAndServerAndModel(actorUrl)
+
+ const verified = isHTTPSignatureVerified(parsed, actor)
+ if (verified !== true) {
+ res.sendStatus(403)
+ return false
+ }
+
+ res.locals.signature = { actor }
+
+ return true
+}
+
+async function checkJsonLDSignature (req: Request, res: Response) {
+ const signatureObject: ActivityPubSignature = req.body.signature
+
+ if (!signatureObject || !signatureObject.creator) {
+ res.sendStatus(403)
+ return false
+ }
+
+ const [ creator ] = signatureObject.creator.split('#')
+
+ logger.debug('Checking JsonLD signature of actor %s...', creator)
+
+ const actor = await getOrCreateActorAndServerAndModel(creator)
+ const verified = await isJsonLDSignatureVerified(actor, req.body)
+
+ if (verified !== true) {
+ res.sendStatus(403)
+ return false
+ }
+
+ res.locals.signature = { actor }
+
+ return true
}