From d8d5b699bff46a2fbf0aaccee4438ca680021f15 Mon Sep 17 00:00:00 2001
From: zelig <viktor.tron@gmail.com>
Date: Mon, 22 Jun 2015 11:17:54 +0100
Subject: [PATCH] add chunk validation to netStore.addStoreRequest

---
 bzz/netstore.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/bzz/netstore.go b/bzz/netstore.go
index 9a220c2d21ed..9f77432a4216 100644
--- a/bzz/netstore.go
+++ b/bzz/netstore.go
@@ -140,9 +140,19 @@ func (self *netStore) addStoreRequest(req *storeRequestMsgData) {
 			Size:  int64(binary.LittleEndian.Uint64(req.SData[0:8])),
 		}
 	} else if chunk.SData == nil {
+		// need data, validate now
+		hasher := hasherfunc.New()
+		hasher.Write(data)
+		if !bytes.Equal(hasher.Sum(nil), key) {
+			// data does not validate, ignore
+			glog.V(logger.Warn).Infof("netStore.addStoreRequest: chunk invalid. store request ignored: %v", req)
+			return
+		}
+
 		chunk.SData = req.SData
 		chunk.Size = int64(binary.LittleEndian.Uint64(req.SData[0:8]))
 	} else {
+		// data is found, store request ignored
 		return
 	}
 	chunk.source = req.peer