1 files changed, 50 insertions, 0 deletions

diff --git a/middlewares/secure.js b/middlewares/secure.js
new file mode 100644
index 000000000..99ac9cdae
--- /dev/null
+++ b/middlewares/secure.js
@@ -0,0 +1,50 @@
+;(function () {
+  'use strict'
+
+  var fs = require('fs')
+  var ursa = require('ursa')
+
+  var logger = require('../helpers/logger')
+  var Pods = require('../models/pods')
+  var utils = require('../helpers/utils')
+
+  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 crt = ursa.createPublicKey(pod.publicKey)
+      var signature_ok = crt.hashAndVerify('sha256', new Buffer(req.body.signature.url).toString('hex'), req.body.signature.signature, 'hex')
+
+      if (signature_ok === true) {
+        var myKey = ursa.createPrivateKey(fs.readFileSync(utils.getCertDir() + 'peertube.key.pem'))
+        var decryptedKey = myKey.decrypt(req.body.key, 'hex', 'utf8')
+        req.body.data = JSON.parse(utils.symetricDecrypt(req.body.data, decryptedKey))
+        delete req.body.key
+      } else {
+        logger.error('Signature is not okay in decryptBody for %s.', req.body.signature.url)
+        return res.sendStatus(403)
+      }
+
+      next()
+    })
+  }
+
+  // ---------------------------------------------------------------------------
+
+  module.exports = secureMiddleware
+})()