server/lib/job-queue/handlers/utils/activitypub-http-utils.ts

   1 import { buildSignedActivity } from '../../../../helpers/activitypub'
   2 import { getServerActor } from '../../../../helpers/utils'
   3 import { ActorModel } from '../../../../models/activitypub/actor'
   4 import { sha256 } from '../../../../helpers/core-utils'
   5 import { HTTP_SIGNATURE } from '../../../../initializers/constants'
   6 import { MActor } from '../../../../typings/models'
   7
   8 type Payload = { body: any, signatureActorId?: number }
   9
  10 async function computeBody (payload: Payload) {
  11   let body = payload.body
  12
  13   if (payload.signatureActorId) {
  14     const actorSignature = await ActorModel.load(payload.signatureActorId)
  15     if (!actorSignature) throw new Error('Unknown signature actor id.')
  16     body = await buildSignedActivity(actorSignature, payload.body)
  17   }
  18
  19   return body
  20 }
  21
  22 async function buildSignedRequestOptions (payload: Payload) {
  23   let actor: MActor | null
  24
  25   if (payload.signatureActorId) {
  26     actor = await ActorModel.load(payload.signatureActorId)
  27     if (!actor) throw new Error('Unknown signature actor id.')
  28   } else {
  29     // We need to sign the request, so use the server
  30     actor = await getServerActor()
  31   }
  32
  33   const keyId = actor.url
  34   return {
  35     algorithm: HTTP_SIGNATURE.ALGORITHM,
  36     authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME,
  37     keyId,
  38     key: actor.privateKey,
  39     headers: HTTP_SIGNATURE.HEADERS_TO_SIGN
  40   }
  41 }
  42
  43 function buildGlobalHeaders (body: any) {
  44   return {
  45     'Digest': buildDigest(body)
  46   }
  47 }
  48
  49 function buildDigest (body: any) {
  50   const rawBody = typeof body === 'string' ? body : JSON.stringify(body)
  51
  52   return 'SHA-256=' + sha256(rawBody, 'base64')
  53 }
  54
  55 export {
  56   buildDigest,
  57   buildGlobalHeaders,
  58   computeBody,
  59   buildSignedRequestOptions
  60 }