From 33aa69fc14e4a3f5b76fed84d06caeb3e9fe85a7 Mon Sep 17 00:00:00 2001
From: Jonathan Rudenberg <jonathan@titanous.com>
Date: Sun, 6 Jul 2014 14:40:04 -0700
Subject: [PATCH] Fix reversed extra and info

---
 box/box.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/box/box.go b/box/box.go
index 71333d8..f69f249 100644
--- a/box/box.go
+++ b/box/box.go
@@ -157,7 +157,7 @@ func (c *Crypter) DecryptBody(authtext, ciphertext []byte) ([]byte, error) {
 
 func (c *Crypter) deriveKey(dh, cv []byte) ([]byte, []byte) {
 	extra := append(c.Cipher.AppendName(c.scratch[:0]), c.KDFNum)
-	k := DeriveKey(dh, extra, cv, CVLen+c.Cipher.CCLen())
+	k := DeriveKey(dh, cv, extra, CVLen+c.Cipher.CCLen())
 	c.KDFNum++
 	return k[:CVLen], k[CVLen:]
 }