Don't crash on youtube-dl update write error

[github/Chocobozzz/PeerTube.git] / server / middlewares / activitypub.ts

diff --git a/server/middlewares/activitypub.ts b/server/middlewares/activitypub.ts
index 1ec8884772d6ea8186c92a3cdfae8f416caf0c6c..ce94a2129f84f56c275d3cfaf3e1c965b816a295 100644 (file)
--- a/server/middlewares/activitypub.ts
+++ b/server/middlewares/activitypub.ts
@@ -1,23 +1,24 @@
-import { eachSeries } from 'async'
-import { NextFunction, Request, RequestHandler, Response } from 'express'
-import { ActivityPubSignature } from '../../shared'
+import { NextFunction, Request, Response } from 'express'
+import { ActivityDelete, ActivityPubSignature } from '../../shared'
 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 { ACCEPT_HEADERS, ACTIVITY_PUB, HTTP_SIGNATURE } from '../initializers/constants'
+import { getOrCreateActorAndServerAndModel } from '../lib/activitypub/actor'
 import { loadActorUrlOrGetFromWebfinger } from '../helpers/webfinger'
+import { isActorDeleteActivityValid } from '@server/helpers/custom-validators/activitypub/actor'
+import { getAPId } from '@server/helpers/activitypub'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 async function checkSignature (req: Request, res: Response, next: NextFunction) {
   try {
     const httpSignatureChecked = await checkHttpSignature(req, res)
     if (httpSignatureChecked !== true) return
 
-    const actor: ActorModel = res.locals.signature.actor
+    const actor = res.locals.signature.actor
 
     // Forwarded activity
     const bodyActor = req.body.actor
-    const bodyActorId = bodyActor && bodyActor.id ? bodyActor.id : bodyActor
+    const bodyActorId = getAPId(bodyActor)
     if (bodyActorId && bodyActorId !== actor.url) {
       const jsonLDSignatureChecked = await checkJsonLDSignature(req, res)
       if (jsonLDSignatureChecked !== true) return
@@ -25,49 +26,58 @@ async function checkSignature (req: Request, res: Response, next: NextFunction)
 
     return next()
   } catch (err) {
-    logger.error('Error in ActivityPub signature checker.', err)
-    return res.sendStatus(403)
+    const activity: ActivityDelete = req.body
+    if (isActorDeleteActivityValid(activity) && activity.object === activity.actor) {
+      logger.debug('Handling signature error on actor delete activity', { err })
+      return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
+    }
+
+    logger.warn('Error in ActivityPub signature checker.', { err })
+    return res.sendStatus(HttpStatusCode.FORBIDDEN_403)
   }
 }
 
-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)
+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')
+  }
 
-    if (Array.isArray(fun) === true) {
-      return eachSeries(fun as RequestHandler[], (f, cb) => {
-        f(req, res, cb)
-      }, next)
-    }
+  logger.debug('ActivityPub request for %s.', req.url)
 
-    return (fun as RequestHandler)(req, res, next)
-  }
+  return next()
 }
 
 // ---------------------------------------------------------------------------
 
 export {
   checkSignature,
-  executeIfActivityPub
+  executeIfActivityPub,
+  checkHttpSignature
 }
 
 // ---------------------------------------------------------------------------
 
 async function checkHttpSignature (req: Request, res: Response) {
-  // FIXME: mastodon does not include the Signature scheme
+  // FIXME: compatibility with http-signature < v1.3
   const sig = req.headers[HTTP_SIGNATURE.HEADER_NAME] as string
-  if (sig && sig.startsWith('Signature ') === false) req.headers[HTTP_SIGNATURE.HEADER_NAME] = 'Signature ' + sig
+  if (sig && sig.startsWith('Signature ') === true) req.headers[HTTP_SIGNATURE.HEADER_NAME] = sig.replace(/^Signature /, '')
 
-  const parsed = parseHTTPSignature(req)
+  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.status(HttpStatusCode.FORBIDDEN_403).json({ error: err.message })
+    return false
+  }
 
   const keyId = parsed.keyId
   if (!keyId) {
-    res.sendStatus(403)
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -82,7 +92,9 @@ async function checkHttpSignature (req: Request, res: Response) {
 
   const verified = isHTTPSignatureVerified(parsed, actor)
   if (verified !== true) {
-    res.sendStatus(403)
+    logger.warn('Signature from %s is invalid', actorUrl, { parsed })
+
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -94,8 +106,8 @@ async function checkHttpSignature (req: Request, res: Response) {
 async function checkJsonLDSignature (req: Request, res: Response) {
   const signatureObject: ActivityPubSignature = req.body.signature
 
-  if (!signatureObject.creator) {
-    res.sendStatus(403)
+  if (!signatureObject || !signatureObject.creator) {
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -107,7 +119,9 @@ async function checkJsonLDSignature (req: Request, res: Response) {
   const verified = await isJsonLDSignatureVerified(actor, req.body)
 
   if (verified !== true) {
-    res.sendStatus(403)
+    logger.warn('Signature not verified.', req.body)
+
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }