Here you can find the source of getHash(byte[] data, int offset, int length)
| Parameter | Description |
|---|---|
| data | array containing the data |
| offset | data offset |
| length | data length |
public static byte[] getHash(byte[] data, int offset, int length)
//package com.java2s; /*//from w w w.jav a 2 s . c om * * * Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 only, as published by the Free Software Foundation. * * 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 version 2 for more details (a copy is * included at /legal/license.txt). * * You should have received a copy of the GNU General Public License * version 2 along with this work; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 or visit www.sun.com if you need additional * information or have any questions. */ import java.security.GeneralSecurityException; import java.security.MessageDigest; public class Main { /** * Calculates SHA-1 hash for given data. * @param data array containing the data * @param offset data offset * @param length data length * @return SHA-1 hash */ public static byte[] getHash(byte[] data, int offset, int length) { byte[] tmp = new byte[20]; try { MessageDigest md = MessageDigest.getInstance("SHA-1"); md.update(data, offset, length); md.digest(tmp, 0, tmp.length); } catch (GeneralSecurityException e) { // algorithm not found - not in this implementation throw new RuntimeException("SHA-1 algorithm for MessageDigest not supported"); } return tmp; } }