4 files changed, 201 insertions, 1 deletions
diff --git a/app/scripts/lib/config-manager.js b/app/scripts/lib/config-manager.js
index cced32670..ae4a84082 100644
--- a/app/scripts/lib/config-manager.js
+++ b/app/scripts/lib/config-manager.js
@@ -110,6 +110,27 @@ ConfigManager.prototype.setWallet = function (wallet) {
   this.setData(data)
 }
 
+ConfigManager.prototype.setVault = function (encryptedString) {
+  var data = this.getData()
+  data.vault = encryptedString
+  this.setData(data)
+}
+
+ConfigManager.prototype.getVault = function () {
+  var data = this.getData()
+  return ('vault' in data) && data.vault
+}
+
+ConfigManager.prototype.getKeychains = function () {
+  return this.migrator.getData().keychains || []
+}
+
+ConfigManager.prototype.setKeychains = function (keychains) {
+  var data = this.migrator.getData()
+  data.keychains = keychains
+  this.setData(data)
+}
+
 ConfigManager.prototype.getSelectedAccount = function () {
   var config = this.getConfig()
   return config.selectedAccount
@@ -249,6 +270,17 @@ ConfigManager.prototype.setNicknameForWallet = function (account, nickname) {
 
 // observable
 
+ConfigManager.prototype.getSalt = function () {
+  var data = this.getData()
+  return ('salt' in data) && data.salt
+}
+
+ConfigManager.prototype.setSalt = function(salt) {
+  var data = this.getData()
+  data.salt = salt
+  this.setData(data)
+}
+
 ConfigManager.prototype.subscribe = function (fn) {
   this._subs.push(fn)
   var unsubscribe = this.unsubscribe.bind(this, fn)
diff --git a/app/scripts/lib/encryptor.js b/app/scripts/lib/encryptor.js
new file mode 100644
index 000000000..832e6d528
--- /dev/null
+++ b/app/scripts/lib/encryptor.js
@@ -0,0 +1,146 @@
+var ethUtil = require('ethereumjs-util')
+
+module.exports = {
+
+  // Simple encryption methods:
+  encrypt,
+  decrypt,
+
+  // More advanced encryption methods:
+  keyFromPassword,
+  encryptWithKey,
+  decryptWithKey,
+
+  // Buffer <-> String methods
+  convertArrayBufferViewtoString,
+  convertStringToArrayBufferView,
+
+  // Buffer <-> Hex string methods
+  serializeBufferForStorage,
+  serializeBufferFromStorage,
+
+  // Buffer <-> base64 string methods
+  encodeBufferToBase64,
+  decodeBase64ToBuffer,
+
+  generateSalt,
+}
+
+// Takes a Pojo, returns encrypted text.
+function encrypt (password, dataObj) {
+  return keyFromPassword(password)
+  .then(function (passwordDerivedKey) {
+    return encryptWithKey(passwordDerivedKey, dataObj)
+  })
+}
+
+function encryptWithKey (key, dataObj) {
+  var data = JSON.stringify(dataObj)
+  var dataBuffer = convertStringToArrayBufferView(data)
+  var vector = global.crypto.getRandomValues(new Uint8Array(16))
+
+  return global.crypto.subtle.encrypt({
+    name: 'AES-GCM',
+    iv: vector,
+  }, key, dataBuffer).then(function(buf){
+    var buffer = new Uint8Array(buf)
+    var vectorStr = encodeBufferToBase64(vector)
+    var vaultStr = encodeBufferToBase64(buffer)
+    return `${vaultStr}\\${vectorStr}`
+  })
+}
+
+// Takes encrypted text, returns the restored Pojo.
+function decrypt (password, text) {
+  return keyFromPassword(password)
+  .then(function (key) {
+    return decryptWithKey(key, text)
+  })
+}
+
+function decryptWithKey (key, text) {
+  const parts = text.split('\\')
+  const encryptedData = decodeBase64ToBuffer(parts[0])
+  const vector = decodeBase64ToBuffer(parts[1])
+  return crypto.subtle.decrypt({name: 'AES-GCM', iv: vector}, key, encryptedData)
+  .then(function(result){
+    const decryptedData = new Uint8Array(result)
+    const decryptedStr = convertArrayBufferViewtoString(decryptedData)
+    const decryptedObj = JSON.parse(decryptedStr)
+    return decryptedObj
+  })
+}
+
+function convertStringToArrayBufferView (str) {
+  var bytes = new Uint8Array(str.length)
+  for (var i = 0; i < str.length; i++) {
+    bytes[i] = str.charCodeAt(i)
+  }
+
+  return bytes
+}
+
+function convertArrayBufferViewtoString (buffer) {
+  var str = ''
+  for (var i = 0; i < buffer.byteLength; i++) {
+    str += String.fromCharCode(buffer[i])
+  }
+
+  return str
+}
+
+function keyFromPassword (password) {
+  var passBuffer = convertStringToArrayBufferView(password)
+  return global.crypto.subtle.digest('SHA-256', passBuffer)
+  .then(function (passHash){
+    return global.crypto.subtle.importKey('raw', passHash, {name: 'AES-GCM'}, false, ['encrypt', 'decrypt'])
+  })
+}
+
+function serializeBufferFromStorage (str) {
+  str = ethUtil.stripHexPrefix(str)
+  var buf = new Uint8Array(str.length / 2)
+  for (var i = 0; i < str.length; i += 2) {
+    var seg = str.substr(i, 2)
+    buf[i / 2] = parseInt(seg, 16)
+  }
+  return buf
+}
+
+// Should return a string, ready for storage, in hex format.
+function serializeBufferForStorage (buffer) {
+  var result = '0x'
+  var len = buffer.length || buffer.byteLength
+  for (var i = 0; i < len; i++) {
+    result += unprefixedHex(buffer[i])
+  }
+  return result
+}
+
+function unprefixedHex (num) {
+  var hex = num.toString(16)
+  while (hex.length < 2) {
+    hex = '0' + hex
+  }
+  return hex
+}
+
+function encodeBufferToBase64 (buf) {
+  var b64encoded = btoa(String.fromCharCode.apply(null, buf))
+  return b64encoded
+}
+
+function decodeBase64ToBuffer (base64) {
+  var buf = new Uint8Array(atob(base64).split('')
+  .map(function(c) {
+    return c.charCodeAt(0)
+  }))
+  return buf
+}
+
+function generateSalt (byteCount = 32) {
+  var view = new Uint8Array(byteCount)
+  global.crypto.getRandomValues(view)
+  var b64encoded = btoa(String.fromCharCode.apply(null, view))
+  return b64encoded
+}
diff --git a/app/scripts/lib/idStore.js b/app/scripts/lib/idStore.js
index 402a5e612..236de3fd2 100644
--- a/app/scripts/lib/idStore.js
+++ b/app/scripts/lib/idStore.js
@@ -114,7 +114,6 @@ IdentityStore.prototype.getState = function () {
     conversionRate: configManager.getConversionRate(),
     conversionDate: configManager.getConversionDate(),
     gasMultiplier: configManager.getGasMultiplier(),
-
   }))
 }
 
diff --git a/app/scripts/lib/sig-util.js b/app/scripts/lib/sig-util.js
new file mode 100644
index 000000000..f8748f535
--- /dev/null
+++ b/app/scripts/lib/sig-util.js
@@ -0,0 +1,23 @@
+const ethUtil = require('ethereumjs-util')
+
+module.exports = {
+
+  concatSig: function (v, r, s) {
+    const rSig = ethUtil.fromSigned(r)
+    const sSig = ethUtil.fromSigned(s)
+    const vSig = ethUtil.bufferToInt(v)
+    const rStr = padWithZeroes(ethUtil.toUnsigned(rSig).toString('hex'), 64)
+    const sStr = padWithZeroes(ethUtil.toUnsigned(sSig).toString('hex'), 64)
+    const vStr = ethUtil.stripHexPrefix(ethUtil.intToHex(vSig))
+    return ethUtil.addHexPrefix(rStr.concat(sStr, vStr)).toString('hex')
+  },
+
+}
+
+function padWithZeroes (number, length) {
+  var myString = '' + number
+  while (myString.length < length) {
+    myString = '0' + myString
+  }
+  return myString
+}