From 335c94e24c50fdf10d5fbec9f491c2c20677be1d Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Thu, 18 Jan 2018 09:03:27 -0500
Subject: [PATCH] macBytes must exist if key has macKey

---
 src/services/crypto.service.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/services/crypto.service.ts b/src/services/crypto.service.ts
index 2b378c4202d..d58df100fd7 100644
--- a/src/services/crypto.service.ts
+++ b/src/services/crypto.service.ts
@@ -482,6 +482,11 @@ export class CryptoService implements CryptoServiceInterface {
         const keyForEnc = await this.getKeyForEncryption(key);
         const theKey = this.resolveLegacyKey(encType, keyForEnc);
 
+        if (theKey.macKey != null && macBytes == null) {
+            console.error('macBytes required.');
+            return null;
+        }
+
         if (encType !== theKey.encType) {
             // tslint:disable-next-line
             console.error('encType unavailable.');