Add Uint8Array support

Author: timonegk

lib/precondition.js

@@ -1,14 +1,15 @@
 var MAX_ALLOC = Math.pow(2, 30) - 1 // default in iojs
 
-function checkBuffer (buf, name) {
-  if (typeof buf !== 'string' && !Buffer.isBuffer(buf)) {
+function checkType (variable, name) {
+  // checks whether the type of 'variable' is one of string, Buffer or Uint8Array
+  if (typeof variable !== 'string' && !Buffer.isBuffer(variable) && Object.prototype.toString.call(variable) !== '[object Uint8Array]') {
     throw new TypeError(name + ' must be a buffer or string')
   }
 }
 
 module.exports = function (password, salt, iterations, keylen) {
-  checkBuffer(password, 'Password')
-  checkBuffer(salt, 'Salt')
+  checkType(password, 'Password')
+  checkType(salt, 'Salt')
 
   if (typeof iterations !== 'number') {
     throw new TypeError('Iterations not a number')