/*
 * Java code sample, implementing 64 bit FNV-1a
 * By Stefan Santesson
 */

import java.math.BigInteger;

public class FNV {

   static public BigInteger getFNV1aToByte(byte[] inp) {

       BigInteger m = new BigInteger("2").pow(64);
       BigInteger fnvPrime = new BigInteger("1099511628211");
       BigInteger fnvOffsetBasis =
               new BigInteger("14695981039346656037");

       BigInteger digest = fnvOffsetBasis;

       for (byte b : inp) {
           digest = digest.xor(BigInteger.valueOf((int) b & 255));
           digest = digest.multiply(fnvPrime).mod(m);
       }
       return digest;

   }
}