Here you can find the source of xor(byte[] a, byte[] b)
public static byte[] xor(byte[] a, byte[] b)
//package com.java2s; /**//w w w . j a va 2 s. co m * Copyright (c) 11/05/16, Jonas Waage * <p> * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and * to permit persons to whom the Software is furnished to do so, subject to the following conditions: * <p> * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. * <p> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ public class Main { public static byte[] xor(byte[] a, byte[] b) { if (a.length != b.length) { throw new IllegalArgumentException( "Byte arrays must have same size, was: " + a.length + " and " + b.length); } byte[] out = new byte[a.length]; for (int i = 0; i < a.length; i++) { out[i] = sign(((int) a[i]) ^ ((int) b[i])); } return out; } /** * * @param by int to convert * @return java bytes are two's complement stuff */ public static byte sign(int by) { return (byte) (0xff & by); } }