fill key with zeros during normalization

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6635 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/net/yacy/kelondro/blob/HeapReader.java

@@ -29,6 +29,7 @@
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -115,11 +116,15 @@ protected byte[] normalizeKey(byte[] key) {
         return normalizeKey(key, this.keylength);
     }
 
+
+    private static final byte zero = 0;
+
     protected static byte[] normalizeKey(byte[] key, int keylength) {
         if (key.length == keylength) return key;
         byte[] k = new byte[keylength];
         if (key.length < keylength) {
             System.arraycopy(key, 0, k, 0, key.length);
+            for (int i = key.length; i < keylength; i++) k[i] = zero;
         } else {
             System.arraycopy(key, 0, k, 0, keylength);
         }