CrackerCore is now capable to store stats.

.gitignore

@@ -0,0 +1 @@
+target

src/cz/cvut/keyczar/homework/CrackerCore.java

@@ -5,13 +5,13 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class CrackerCore {
-    public static int[] select(List<long[]> stats) {
+    public int[] select(List<long[]> stats, byte[] hmac) {
-        // each item of the stats must have length exactly Byte.MAX_VALUE
         double[] means = Stats.mean(stats);
 
         ArrayList<Integer> idx = new ArrayList<Integer>();
 
         // TODO: implement your code here **************************
+        // you can store your stats
         for (int i = 0; i< means.length; i++) {
             // for each byte test the condition
             idx.add(i);

src/cz/cvut/keyczar/homework/HmacCracker.java

@@ -27,6 +27,7 @@ public class HmacCracker implements Runnable {
     byte[] hmac;
     int maxIterations;
     int totalIterations = 0;
+    CrackerCore core = new CrackerCore();
 
     public HmacCracker(OutputStream outputStream, InputStream inputStream, int iMax, byte[] signature, char[] msg) {
 		this.outputStream = outputStream;
@@ -124,7 +125,7 @@ public class HmacCracker implements Runnable {
                 statsPool.add(Arrays.copyOf(stats, stats.length));
                 maxIt--;
             }
-            int[] bestM = CrackerCore.select(statsPool);
+            int[] bestM = core.select(statsPool, hmac);
             if (bestM == null) {
                 bin = bin*2;
                 System.out.print("#"); // we need to collect more stats