From 546a7fedf689d2f2858a47a630773c8c614057bc Mon Sep 17 00:00:00 2001
From: Erik Tylek Kettenburg <ekettenburg@digistump.com>
Date: Thu, 20 Oct 2016 17:03:40 -0700
Subject: [PATCH] Update CryptoStream.js

Fix from https://github.com/spark/spark-protocol/pull/14/commits/c715990992f32119745f2decd0861d4b63efce36
---
 js/lib/CryptoStream.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/js/lib/CryptoStream.js b/js/lib/CryptoStream.js
index 9add37db..b4dfbb2a 100644
--- a/js/lib/CryptoStream.js
+++ b/js/lib/CryptoStream.js
@@ -69,12 +69,13 @@ CryptoStream.prototype.getCipher = function (callback) {
     cipher.on('readable', function () {
         var chunk = cipher.read();
 
-        if (!ciphertext) {
-            ciphertext = chunk;
-        }
-        else {
-            ciphertext = Buffer.concat([ciphertext, chunk], ciphertext.length + chunk.length);
-        }
+        if(chunk){
+             if (!ciphertext) {
+                 ciphertext = chunk;
+             }
+             else {
+                 ciphertext = Buffer.concat([ciphertext, chunk], ciphertext.length + chunk.length);
+             }
     });
     cipher.on('end', function () {
         //var action = (that.encrypt) ? "encrypting" : "decrypting";