Java tutorial
//package com.java2s; //License from project: Open Source License import java.security.MessageDigest; public class Main { public static byte[] computeSHA256(byte[] convertme, int offset, int len) { try { MessageDigest md = MessageDigest.getInstance("SHA-256"); md.update(convertme, offset, len); return md.digest(); } catch (Exception e) { e.printStackTrace(); } return null; } }