polyfilling scrypt for node 8.5+

Signed-off-by: Claudius <opensource@amenthes.de>

1 files changed, 13 insertions, 4 deletions

diff --git a/lib/models/user.js b/lib/models/user.js
index 8da12b83..76e20a32 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -1,11 +1,20 @@
 'use strict'
 // external modules
-var Sequelize = require('sequelize')
-var scrypt = require('scrypt-kdf')
+const Sequelize = require('sequelize')
+const crypto = require('crypto')
+if (!crypto.scrypt) {
+  // polyfill for node.js 8.0, see https://github.com/chrisveness/scrypt-kdf#openssl-implementation
+  const scryptAsync = require('scrypt-async')
+  crypto.scrypt = function (password, salt, keylen, options, callback) {
+    const opt = Object.assign({}, options, { dkLen: keylen })
+    scryptAsync(password, salt, opt, (derivedKey) => callback(null, Buffer.from(derivedKey)))
+  }
+}
+const scrypt = require('scrypt-kdf')
 
 // core
-var logger = require('../logger')
-var { generateAvatarURL } = require('../letter-avatars')
+const logger = require('../logger')
+const { generateAvatarURL } = require('../letter-avatars')
 
 module.exports = function (sequelize, DataTypes) {
   var User = sequelize.define('User', {