From a58c1c5b7758cece399f6d52c797449edb640f87 Mon Sep 17 00:00:00 2001
From: Maschell <Maschell@gmx.de>
Date: Wed, 24 Apr 2019 13:27:02 +0200
Subject: [PATCH] Make sure to always read the expected Blocksize from a stream
 of a hashed content.

---
 src/de/mas/wiiu/jnus/utils/cryptography/NUSDecryption.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/de/mas/wiiu/jnus/utils/cryptography/NUSDecryption.java b/src/de/mas/wiiu/jnus/utils/cryptography/NUSDecryption.java
index c8b46d2..2c98878 100644
--- a/src/de/mas/wiiu/jnus/utils/cryptography/NUSDecryption.java
+++ b/src/de/mas/wiiu/jnus/utils/cryptography/NUSDecryption.java
@@ -212,6 +212,10 @@ public class NUSDecryption extends AESDecryption {
                 inBlockBuffer = StreamUtils.getChunkFromStream(inputStream, encryptedBlockBuffer, overflow, BLOCKSIZE);
                 if (writeSize > filesize) writeSize = filesize;
 
+                if (inBlockBuffer != BLOCKSIZE) {
+                    throw new IOException("wasn't able to read  " + BLOCKSIZE);
+                }
+
                 byte[] output;
                 try {
                     output = decryptFileChunkHash(encryptedBlockBuffer, (int) block, contentIndex, h3Hash);