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 { 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
+ try {
+ const httpSignatureChecked = await checkHttpSignature(req, res)
+ if (httpSignatureChecked !== true) return
- const [ creator ] = signatureObject.creator.split('#')
+ const actor: ActorModel = res.locals.signature.actor
- logger.debug('Checking signature of actor %s...', creator)
+ // 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
+ }
- let actor: ActorModel
- try {
- actor = await getOrCreateActorAndServerAndModel(creator)
+ return next()
} catch (err) {
- logger.warn('Cannot create remote actor %s and check signature.', creator, { err })
+ logger.error('Error in ActivityPub signature checker.', 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[]) {
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
}