peertube/middlewares/secure.js

;(function () {
  'use strict'

  var logger = require('../helpers/logger')
  var peertubeCrypto = require('../helpers/peertubeCrypto')
  var Pods = require('../models/pods')

  var secureMiddleware = {
    decryptBody: decryptBody
  }

  function decryptBody (req, res, next) {
    var url = req.body.signature.url
    Pods.findByUrl(url, function (err, pod) {
      if (err) {
        logger.error('Cannot get signed url in decryptBody.', { error: err })
        return res.sendStatus(500)
      }

      if (pod === null) {
        logger.error('Unknown pod %s.', url)
        return res.sendStatus(403)
      }

      logger.debug('Decrypting body from %s.', url)

      var signature_ok = peertubeCrypto.checkSignature(pod.publicKey, url, req.body.signature.signature)

      if (signature_ok === true) {
        peertubeCrypto.decrypt(req.body.key, req.body.data, function (err, decrypted) {
          if (err) {
            logger.error('Cannot decrypt data.', { error: err })
            return res.sendStatus(500)
          }

          req.body.data = JSON.parse(decrypted)
          delete req.body.key

          next()
        })
      } else {
        logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
        return res.sendStatus(403)
      }
    })
  }

  // ---------------------------------------------------------------------------

  module.exports = secureMiddleware
})()