From c6f4d9720ff064186e54088c411558a010fa39c6 Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Thu, 2 Jun 2016 23:28:13 +0700
Subject: [PATCH] fix int overflow on 32 bit in handshake parsing

---
 handshake/handshake_message.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/handshake/handshake_message.go b/handshake/handshake_message.go
index 32e8aa58e..9a9aa0334 100644
--- a/handshake/handshake_message.go
+++ b/handshake/handshake_message.go
@@ -36,10 +36,10 @@ func ParseHandshakeMessage(r utils.ReadStream) (Tag, map[Tag][]byte, error) {
 
 	resultMap := map[Tag][]byte{}
 
-	dataStart := 0
+	var dataStart uint32
 	for indexPos := 0; indexPos < int(nPairs)*8; indexPos += 8 {
 		tag := Tag(binary.LittleEndian.Uint32(index[indexPos : indexPos+4]))
-		dataEnd := int(binary.LittleEndian.Uint32(index[indexPos+4 : indexPos+8]))
+		dataEnd := uint32(binary.LittleEndian.Uint32(index[indexPos+4 : indexPos+8]))
 
 		dataLen := dataEnd - dataStart
 		if dataLen > protocol.CryptoParameterMaxLength {