From 8a081713224ce00a10271a8c389ab1d85b416ce9 Mon Sep 17 00:00:00 2001
From: Lucas Clemente <lucas@clemente.io>
Date: Mon, 1 Aug 2016 16:27:38 +0200
Subject: [PATCH] move nonce generation to separate file

---
 crypto/chacha20poly1305_aead.go |  8 --------
 crypto/nonce.go                 | 14 ++++++++++++++
 2 files changed, 14 insertions(+), 8 deletions(-)
 create mode 100644 crypto/nonce.go

diff --git a/crypto/chacha20poly1305_aead.go b/crypto/chacha20poly1305_aead.go
index c2388cfd..37cc53e3 100644
--- a/crypto/chacha20poly1305_aead.go
+++ b/crypto/chacha20poly1305_aead.go
@@ -2,7 +2,6 @@ package crypto
 
 import (
 	"crypto/cipher"
-	"encoding/binary"
 	"errors"
 
 	"github.com/aead/chacha20"
@@ -50,10 +49,3 @@ func (aead *aeadChacha20Poly1305) Open(dst, src []byte, packetNumber protocol.Pa
 func (aead *aeadChacha20Poly1305) Seal(dst, src []byte, packetNumber protocol.PacketNumber, associatedData []byte) []byte {
 	return aead.encrypter.Seal(dst, makeNonce(aead.myIV, packetNumber), src, associatedData)
 }
-
-func makeNonce(iv []byte, packetNumber protocol.PacketNumber) []byte {
-	res := make([]byte, 12)
-	copy(res[0:4], iv)
-	binary.LittleEndian.PutUint64(res[4:12], uint64(packetNumber))
-	return res
-}
diff --git a/crypto/nonce.go b/crypto/nonce.go
new file mode 100644
index 00000000..9b6d4164
--- /dev/null
+++ b/crypto/nonce.go
@@ -0,0 +1,14 @@
+package crypto
+
+import (
+	"encoding/binary"
+
+	"github.com/lucas-clemente/quic-go/protocol"
+)
+
+func makeNonce(iv []byte, packetNumber protocol.PacketNumber) []byte {
+	res := make([]byte, 12)
+	copy(res[0:4], iv)
+	binary.LittleEndian.PutUint64(res[4:12], uint64(packetNumber))
+	return res
+}