From 1caa9258685fa5fad8935d3bfcd0eac7d7f84f1e Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sat, 19 Dec 2015 14:41:39 +0100
Subject: Increase GCM IV size from 96 to 128 bits

This pushes back the birthday bound for collisions to make it virtually
irrelevant.
---
 cryptfs/address_translation.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'cryptfs/address_translation.go')

diff --git a/cryptfs/address_translation.go b/cryptfs/address_translation.go
index 147040c..b21cfc7 100644
--- a/cryptfs/address_translation.go
+++ b/cryptfs/address_translation.go
@@ -44,7 +44,7 @@ func (be *CryptFS) CipherSizeToPlainSize(cipherSize uint64) uint64 {
 	blockNo := be.CipherOffToBlockNo(cipherSize - 1)
 	blockCount := blockNo + 1
 
-	overhead := BLOCK_OVERHEAD*blockCount + HEADER_LEN
+	overhead := be.BlockOverhead()*blockCount + HEADER_LEN
 
 	return cipherSize - overhead
 }
@@ -56,7 +56,7 @@ func (be *CryptFS) PlainSizeToCipherSize(plainSize uint64) uint64 {
 	blockNo := be.PlainOffToBlockNo(plainSize - 1)
 	blockCount := blockNo + 1
 
-	overhead := BLOCK_OVERHEAD*blockCount + HEADER_LEN
+	overhead := be.BlockOverhead()*blockCount + HEADER_LEN
 
 	return plainSize + overhead
 }
-- 
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