Encrypted local storage plugin

js/plugins/EncryptedLocalStorage.js

@@ -0,0 +1,30 @@
+var cryptoUtil = require('../util/crypto');
+var LocalStorage = require('./LocalStorage');
+var inherits = require('inherits');
+
+function EncryptedLocalStorage(config) {
+  LocalStorage.apply(this, [config]);
+}
+inherits(EncryptedLocalStorage, LocalStorage);
+
+EncryptedLocalStorage.prototype.getItem = function(name, callback) {
+  var key = cryptoUtil.kdf(this.password, this.email);
+  LocalStorage.prototype.getItem.apply(this, [name, function(err, body) {
+    var decryptedJson = cryptoUtil.decrypt(key, body);
+    if (!decryptedJson) {
+      return callback('Internal Error');
+    }
+    return callback(null, decryptedJson);
+  }]);
+};
+
+EncryptedLocalStorage.prototype.setItem = function(name, value, callback) {
+  var key = cryptoUtil.kdf(this.password, this.email);
+  if (!_.isString(value)) {
+    value = JSON.stringify(value);
+  }
+  var record = cryptoUtil.encrypt(key, value);
+  LocalStorage.prototype.setItem.apply(this, [name, record, callback]);
+};
+
+module.exports = EncryptedLocalStorage;

js/plugins/LocalStorage.js

@@ -8,6 +8,8 @@ LocalStorage.prototype.init = function() {
 };
 
 LocalStorage.prototype.setCredentials = function(email, password, opts) {
+  this.email = email;
+  this.password = password;
 };
 
 LocalStorage.prototype.getItem = function(k,cb) {