middlewares/misc.js

   1 ;(function () {
   2   'use strict'
   3
   4   var ursa = require('ursa')
   5   var fs = require('fs')
   6
   7   var logger = require('../src/logger')
   8   var utils = require('../src/utils')
   9   var PodsDB = require('../src/database').PodsDB
  10
  11   var misc = {}
  12
  13   misc.cache = function (cache) {
  14     return function (req, res, next) {
  15       // If we want explicitly a cache
  16       // Or if we don't specify if we want a cache or no and we are in production
  17       if (cache === true || (cache !== false && process.env.NODE_ENV === 'production')) {
  18         res.setHeader('Cache-Control', 'public')
  19       } else {
  20         res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0, must-revalidate')
  21       }
  22
  23       next()
  24     }
  25   }
  26
  27   misc.decryptBody = function (req, res, next) {
  28     PodsDB.findOne({ url: req.body.signature.url }, function (err, pod) {
  29       if (err) {
  30         logger.error('Cannot get signed url in decryptBody.', { error: err })
  31         return res.sendStatus(500)
  32       }
  33
  34       if (pod === null) {
  35         logger.error('Unknown pod %s.', req.body.signature.url)
  36         return res.sendStatus(403)
  37       }
  38
  39       logger.debug('Decrypting body from %s.', req.body.signature.url)
  40
  41       var crt = ursa.createPublicKey(pod.publicKey)
  42       var signature_ok = crt.hashAndVerify('sha256', new Buffer(req.body.signature.url).toString('hex'), req.body.signature.signature, 'hex')
  43
  44       if (signature_ok === true) {
  45         var myKey = ursa.createPrivateKey(fs.readFileSync(utils.certDir + 'peertube.key.pem'))
  46         var decryptedKey = myKey.decrypt(req.body.key, 'hex', 'utf8')
  47         req.body.data = JSON.parse(utils.symetricDecrypt(req.body.data, decryptedKey))
  48         delete req.body.key
  49       } else {
  50         logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
  51         return res.sendStatus(403)
  52       }
  53
  54       next()
  55     })
  56   }
  57
  58   module.exports = misc
  59 })()