From 1f02e9d41d9e628cc1fc0cc8a7aab841b07b8122 Mon Sep 17 00:00:00 2001
From: Maschell <Maschell@gmx.de>
Date: Wed, 24 Apr 2019 13:27:54 +0200
Subject: [PATCH] Give the NUSDataProvider implementation a hint to limit the
 length of the content stream

---
 .../FSTDataProviderNUSTitle.java              | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/de/mas/wiiu/jnus/implementations/FSTDataProviderNUSTitle.java b/src/de/mas/wiiu/jnus/implementations/FSTDataProviderNUSTitle.java
index b9a8e80..43cb5ab 100644
--- a/src/de/mas/wiiu/jnus/implementations/FSTDataProviderNUSTitle.java
+++ b/src/de/mas/wiiu/jnus/implementations/FSTDataProviderNUSTitle.java
@@ -119,7 +119,26 @@ public class FSTDataProviderNUSTitle implements FSTDataProvider, HasNUSTitle {
 
         NUSDataProvider dataProvider = title.getDataProvider();
 
-        InputStream in = dataProvider.getInputStreamFromContent(c, fileOffsetBlock);
+        Optional<Long> readFilesize = Optional.empty();
+        if (c.isHashed()) {
+            long offsetInBlock = fileOffset - ((fileOffsetBlock / 0x10000) * 0xFC00);
+            if (offsetInBlock + fileSize < 0xFC00) {
+                readFilesize = Optional.of(0x10000L);
+            } else {
+                long curVal = 0x10000;
+                long missing = (fileSize - (0xFC00 - offsetInBlock));
+
+                curVal += (missing / 0xFC00) * 0x10000;
+
+                if (missing % 0xFC00 > 0) {
+                    curVal += 0x10000;
+                }
+
+                readFilesize = Optional.of(curVal);
+            }
+        }
+
+        InputStream in = dataProvider.getInputStreamFromContent(c, fileOffsetBlock, readFilesize);
 
         try {
             NUSDecryption nusdecryption = new NUSDecryption(title.getTicket().get());