-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 { NextFunction, Request, Response } from 'express'
+import { isActorDeleteActivityValid } from '@server/helpers/custom-validators/activitypub/actor'
+import { getAPId } from '@server/lib/activitypub/activity'
+import { wrapWithSpanAndContext } from '@server/lib/opentelemetry/tracing'
+import { ActivityDelete, ActivityPubSignature, HttpStatusCode } from '@shared/models'
+import { logger } from '../helpers/logger'
+import { isHTTPSignatureVerified, isJsonLDSignatureVerified, parseHTTPSignature } from '../helpers/peertube-crypto'
+import { ACCEPT_HEADERS, ACTIVITY_PUB, HTTP_SIGNATURE } from '../initializers/constants'
+import { getOrCreateAPActor, loadActorUrlOrGetFromWebfinger } from '../lib/activitypub/actors'
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
- logger.debug('Checking signature of account %s...', signatureObject.creator)
+ const actor = res.locals.signature.actor
- let account = await db.Account.loadByUrl(signatureObject.creator)
-
- // We don't have this account in our database, fetch it on remote
- if (!account) {
- account = await fetchRemoteAccount(signatureObject.creator)
+ // Forwarded activity
+ const bodyActor = req.body.actor
+ const bodyActorId = getAPId(bodyActor)
+ if (bodyActorId && bodyActorId !== actor.url) {
+ const jsonLDSignatureChecked = await checkJsonLDSignature(req, res)
+ if (jsonLDSignatureChecked !== true) return
+ }
- if (!account) {
- return res.sendStatus(403)
+ return next()
+ } catch (err) {
+ const activity: ActivityDelete = req.body
+ if (isActorDeleteActivityValid(activity) && activity.object === activity.actor) {
+ logger.debug('Handling signature error on actor delete activity', { err })
+ return res.status(HttpStatusCode.NO_CONTENT_204).end()
}
- // Save our new account and its server in database
- await saveAccountAndServerIfNotExist(account)
+ logger.warn('Error in ActivityPub signature checker.', { err })
+ return res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: 'ActivityPub signature could not be checked'
+ })
}
+}
- const verified = await isSignatureVerified(account, req.body)
- if (verified === false) return res.sendStatus(403)
-
- res.locals.signature = {
- account
+function executeIfActivityPub (req: Request, res: Response, next: NextFunction) {
+ const accepted = req.accepts(ACCEPT_HEADERS)
+ if (accepted === false || ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS.includes(accepted) === false) {
+ // Bypass this route
+ return next('route')
}
+ logger.debug('ActivityPub request for %s.', req.url)
+
return next()
}
-function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
- return (req: Request, res: Response, next: NextFunction) => {
- if (!req.accepts(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)) {
- return next()
+// ---------------------------------------------------------------------------
+
+export {
+ checkSignature,
+ executeIfActivityPub,
+ checkHttpSignature
+}
+
+// ---------------------------------------------------------------------------
+
+async function checkHttpSignature (req: Request, res: Response) {
+ return wrapWithSpanAndContext('peertube.activitypub.checkHTTPSignature', async () => {
+ // FIXME: compatibility with http-signature < v1.3
+ const sig = req.headers[HTTP_SIGNATURE.HEADER_NAME] as string
+ if (sig && sig.startsWith('Signature ') === true) req.headers[HTTP_SIGNATURE.HEADER_NAME] = sig.replace(/^Signature /, '')
+
+ let parsed: any
+
+ try {
+ parsed = parseHTTPSignature(req, HTTP_SIGNATURE.CLOCK_SKEW_SECONDS)
+ } catch (err) {
+ logger.warn('Invalid signature because of exception in signature parser', { reqBody: req.body, err })
+
+ res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: err.message
+ })
+ return false
+ }
+
+ const keyId = parsed.keyId
+ if (!keyId) {
+ res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: 'Invalid key ID',
+ data: {
+ keyId
+ }
+ })
+ return false
}
- logger.debug('ActivityPub request for %s.', req.url)
+ logger.debug('Checking HTTP signature of actor %s...', keyId)
- if (Array.isArray(fun) === true) {
- return eachSeries(fun as RequestHandler[], (f, cb) => {
- f(req, res, cb)
- }, next)
+ let [ actorUrl ] = keyId.split('#')
+ if (actorUrl.startsWith('acct:')) {
+ actorUrl = await loadActorUrlOrGetFromWebfinger(actorUrl.replace(/^acct:/, ''))
}
- return (fun as RequestHandler)(req, res, next)
- }
+ const actor = await getOrCreateAPActor(actorUrl)
+
+ const verified = isHTTPSignatureVerified(parsed, actor)
+ if (verified !== true) {
+ logger.warn('Signature from %s is invalid', actorUrl, { parsed })
+
+ res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: 'Invalid signature',
+ data: {
+ actorUrl
+ }
+ })
+ return false
+ }
+
+ res.locals.signature = { actor }
+ return true
+ })
}
-// ---------------------------------------------------------------------------
+async function checkJsonLDSignature (req: Request, res: Response) {
+ return wrapWithSpanAndContext('peertube.activitypub.JSONLDSignature', async () => {
+ const signatureObject: ActivityPubSignature = req.body.signature
-export {
- checkSignature,
- executeIfActivityPub
+ if (!signatureObject?.creator) {
+ res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: 'Object and creator signature do not match'
+ })
+ return false
+ }
+
+ const [ creator ] = signatureObject.creator.split('#')
+
+ logger.debug('Checking JsonLD signature of actor %s...', creator)
+
+ const actor = await getOrCreateAPActor(creator)
+ const verified = await isJsonLDSignatureVerified(actor, req.body)
+
+ if (verified !== true) {
+ logger.warn('Signature not verified.', req.body)
+
+ res.fail({
+ status: HttpStatusCode.FORBIDDEN_403,
+ message: 'Signature could not be verified'
+ })
+ return false
+ }
+
+ res.locals.signature = { actor }
+ return true
+ })
}
projects / github / Chocobozzz / PeerTube.git / blobdiff