From 2adaf0464f96e33a69c7e598dc87e24d028bd695 Mon Sep 17 00:00:00 2001
From: rjaeckel <robert.jaeckel@itz.uni-halle.de>
Date: Sun, 31 Jan 2016 23:44:19 +0100
Subject: [PATCH] clear CHUNK variable to avoid infinite loops

---
 ocdec.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ocdec.sh b/ocdec.sh
index 1d67ea7..863773f 100755
--- a/ocdec.sh
+++ b/ocdec.sh
@@ -130,9 +130,11 @@ function decryptFile() {
   # --- Decrypt the file ---
   # OC writes the encrypted file in 8K chunks, each containing it's own iv in the end
   chunkSize=8192
-  while read -d '' -n $chunkSize CHUNK || [ -n "$CHUNK" ]; do
+  while read -d '' -n $chunkSize CHUNK || [ ! -z "$CHUNK" ]; do
     #split chunk into payload an iv string (strip padding from iv)          
     read payload iv <<<`echo $CHUNK | sed -r 's/(.*)00iv00(.{16})xx/\1 \2/'`
+    CHUNK=
+    #if [ -z $CHUNK ]; then break; fi
     # convert base64 iv into hex
     iv=$(echo -n "$iv" | od -An -tx1 | tr -dc '[:xdigit:]' )
     # decode chunk