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     logger.debug('Decrypting body.')
  29
  30     PodsDB.findOne({ url: req.body.signature.url }, function (err, pod) {
  31       if (err) {
  32         logger.error('Cannot get signed url in decryptBody.', { error: err })
  33         res.sendStatus(500)
  34       }
  35
  36       logger.debug('Found one pod which could send the message.', { pod: pod.publicKey, url: req.body.signature.url })
  37
  38       var crt = ursa.createPublicKey(pod.publicKey)
  39       var signature_ok = crt.hashAndVerify('sha256', new Buffer(req.body.signature.url).toString('hex'), req.body.signature.signature, 'hex')
  40
  41       if (signature_ok === true) {
  42         var myKey = ursa.createPrivateKey(fs.readFileSync(utils.certDir + 'peertube.key.pem'))
  43         var decryptedKey = myKey.decrypt(req.body.key, 'hex', 'utf8')
  44         logger.debug(decryptedKey)
  45         req.body.data = JSON.parse(utils.symetricDecrypt(req.body.data, decryptedKey))
  46         logger.debug('Decrypted.', { body: req.body })
  47       } else {
  48         logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
  49         res.sendStatus(500)
  50       }
  51
  52       next()
  53     })
  54   }
  55
  56   module.exports = misc
  57 })()