message: Override sjcl initialization vector
  Summary:
  Reviewers: bigly, leo, benchan, zacleids
  Subscribers: tyler
diff: @@ -602,12 +602,19 @@ BitGo.prototype.encrypt = function(params) {
  common.validateParams(params, ['input', 'password'], []);
  const randomSalt = crypto.randomBytes(8);
  + const randomIV = crypto.randomBytes(16);
  const encryptOptions = {
  iter: 10000,
  ks: 256,
  salt: [
  bytesToWord(randomSalt.slice(0, 4)),
  bytesToWord(randomSalt.slice(4))
  + ],
  + iv: [
  + bytesToWord(randomIV.slice(0, 4)),
  + bytesToWord(randomIV.slice(4, 8)),
  + bytesToWord(randomIV.slice(8, 12)),
  + bytesToWord(randomIV.slice(12, 16))
  ]
  };
  