Here you can find the source of SHA1(byte[] input)
public synchronized static byte[] SHA1(byte[] input) throws Exception
//package com.java2s; /*//from www . j ava2 s . c om JJSP - Java and Javascript Server Pages Copyright (C) 2016 Global Travel Ventures Ltd This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. */ import java.security.*; public class Main { private static MessageDigest sha1; public synchronized static byte[] SHA1(byte[] input) throws Exception { return sha1.digest(input); } }