server/middlewares/secure.js

   1 'use strict'
   2
   3 const logger = require('../helpers/logger')
   4 const mongoose = require('mongoose')
   5 const peertubeCrypto = require('../helpers/peertube-crypto')
   6
   7 const Pod = mongoose.model('Pod')
   8
   9 const secureMiddleware = {
  10   checkSignature,
  11   decryptBody
  12 }
  13
  14 function checkSignature (req, res, next) {
  15   const host = req.body.signature.host
  16   Pod.loadByHost(host, function (err, pod) {
  17     if (err) {
  18       logger.error('Cannot get signed host in decryptBody.', { error: err })
  19       return res.sendStatus(500)
  20     }
  21
  22     if (pod === null) {
  23       logger.error('Unknown pod %s.', host)
  24       return res.sendStatus(403)
  25     }
  26
  27     logger.debug('Decrypting body from %s.', host)
  28
  29     const signatureOk = peertubeCrypto.checkSignature(pod.publicKey, host, req.body.signature.signature)
  30
  31     if (signatureOk === true) {
  32       return next()
  33     }
  34
  35     logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.host)
  36     return res.sendStatus(403)
  37   })
  38 }
  39
  40 function decryptBody (req, res, next) {
  41   peertubeCrypto.decrypt(req.body.key, req.body.data, function (err, decrypted) {
  42     if (err) {
  43       logger.error('Cannot decrypt data.', { error: err })
  44       return res.sendStatus(500)
  45     }
  46
  47     try {
  48       req.body.data = JSON.parse(decrypted)
  49       delete req.body.key
  50     } catch (err) {
  51       logger.error('Error in JSON.parse', { error: err })
  52       return res.sendStatus(500)
  53     }
  54
  55     next()
  56   })
  57 }
  58
  59 // ---------------------------------------------------------------------------
  60
  61 module.exports = secureMiddleware