Here you can find the source of computeSha1(byte[] data)
public static byte[] computeSha1(byte[] data) throws NoSuchAlgorithmException
//package com.java2s; /*/*from www . j a v a 2s. com*/ * Quick-Key Toolset Project. * Copyright (C) 2010 FedICT. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License version * 3.0 as published by the Free Software Foundation. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, see * http://www.gnu.org/licenses/. */ import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static byte[] computeSha1(byte[] data) throws NoSuchAlgorithmException { MessageDigest md = MessageDigest.getInstance("SHA1"); md.update(data); return md.digest(); } }