Here you can find the source of sha256(byte[] data)
public static byte[] sha256(byte[] data) throws NoSuchAlgorithmException
//package com.java2s; /*// w w w.j ava2s . co m * ConnectBot: simple, powerful, open-source SSH client for Android * Copyright 2007 Kenny Root, Jeffrey Sharkey * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static byte[] sha256(byte[] data) throws NoSuchAlgorithmException { return MessageDigest.getInstance("SHA-256").digest(data); } }