From cf2615bb88a6dc0e0af286a638b41e95b8e09b1d Mon Sep 17 00:00:00 2001
From: Esteban Ordano <eordano@gmail.com>
Date: Mon, 27 Oct 2014 10:36:17 -0300
Subject: [PATCH] Encrypted local storage plugin

---
 config.js                           |  3 ++-
 js/plugins/EncryptedLocalStorage.js | 30 +++++++++++++++++++++++++++++
 js/plugins/LocalStorage.js          |  2 ++
 util/build.js                       |  3 +++
 4 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 js/plugins/EncryptedLocalStorage.js

diff --git a/config.js b/config.js
index 72e9c6d30..3bcf7b924 100644
--- a/config.js
+++ b/config.js
@@ -55,9 +55,10 @@ var defaultConfig = {
 
   plugins: {
     //LocalStorage: true,
+    EncryptedLocalStorage: true,
     //GoogleDrive: true,
     //InsightStorage: true
-    EncryptedInsightStorage: true
+    //EncryptedInsightStorage: true
   },
 
   EncryptedInsightStorage: {
diff --git a/js/plugins/EncryptedLocalStorage.js b/js/plugins/EncryptedLocalStorage.js
new file mode 100644
index 000000000..88aec147e
--- /dev/null
+++ b/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;
diff --git a/js/plugins/LocalStorage.js b/js/plugins/LocalStorage.js
index b8af2ccd9..5de9aa735 100644
--- a/js/plugins/LocalStorage.js
+++ b/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) {
diff --git a/util/build.js b/util/build.js
index f89dffed0..86638335e 100644
--- a/util/build.js
+++ b/util/build.js
@@ -101,6 +101,9 @@ var createBundle = function(opts) {
     b.require('./js/plugins/EncryptedInsightStorage', {
       expose: '../plugins/EncryptedInsightStorage'
     });
+    b.require('./js/plugins/EncryptedLocalStorage', {
+      expose: '../plugins/EncryptedLocalStorage'
+    });
   }
 
   b.require('./config', {