Java SHA1 sha1(byte[] message)

Description

sha

License

Open Source License

Declaration

public static byte[] sha1(byte[] message) 

Method Source Code

//package com.java2s;
/*/*from www .  j ava  2  s. co m*/
 * BitThief - A Free Riding BitTorrent Client
 * Copyright (C) 2006 Patrick Moor <patrick@moor.ws>
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static MessageDigest sha1Digest;

    public static byte[] sha1(byte[] message) {
        MessageDigest md = getSha1Digest();
        return md.digest(message);
    }

    public static byte[] sha1(byte[] bytes, int offset, int length) {
        MessageDigest md = getSha1Digest();
        md.update(bytes, offset, length);
        return md.digest();
    }

    private static synchronized MessageDigest getSha1Digest() {
        if (sha1Digest == null) {
            try {
                sha1Digest = MessageDigest.getInstance("SHA-1");
            } catch (NoSuchAlgorithmException e) {
                return null;
            }
        }
        try {
            return (MessageDigest) sha1Digest.clone();
        } catch (CloneNotSupportedException e) {
            return null;
        }
    }
}

Related

1. sha1(byte[] data)
2. SHA1(byte[] input)
3. sha1(byte[] input)
4. sha1(byte[] input)
5. sha1(byte[] input)
6. SHA1(byte[] src)
7. SHA1(ByteBuffer buf, int offset, int size)
8. sha1(File f)
9. sha1(File file)