From 5c525a46a9b287f16fb161ef2a56336619185742 Mon Sep 17 00:00:00 2001
From: kokke <spam@rowdy.dk>
Date: Mon, 15 Dec 2014 21:22:17 +0100
Subject: [PATCH] Update aes.c

---
 aes.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/aes.c b/aes.c
index 21c8430..4c7645f 100644
--- a/aes.c
+++ b/aes.c
@@ -71,8 +71,10 @@ static uint8_t RoundKey[176];
 // The Key input to the AES Program
 static const uint8_t* Key;
 
-// Initial Vector used for CBC mode etc.
-static uint8_t* Iv;
+#if defined(CBC) && CBC
+  // Initial Vector used only for CBC mode
+  static uint8_t* Iv;
+#endif
 
 // The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
 // The numbers below can be computed dynamically trading ROM for RAM -