import java.nio.ByteBuffer;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/*
* Java Bittorrent API as its name indicates is a JAVA API that implements the Bittorrent Protocol
* This project contains two packages:
* 1. jBittorrentAPI is the "client" part, i.e. it implements all classes needed to publish
* files, share them and download them.
* This package also contains example classes on how a developer could create new applications.
* 2. trackerBT is the "tracker" part, i.e. it implements a all classes needed to run
* a Bittorrent tracker that coordinates peers exchanges. *
*
* Copyright (C) 2007 Baptiste Dubuis, Artificial Intelligence Laboratory, EPFL
*
* This file is part of jbittorrentapi-v1.0.zip
*
* Java Bittorrent API is free software and a free user study set-up;
* 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.
*
* Java Bittorrent API 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 Java Bittorrent API; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @version 1.0
* @author Baptiste Dubuis
* To contact the author:
* email: baptiste.dubuis@gmail.com
*
* More information about Java Bittorrent API:
* http://sourceforge.net/projects/bitext/
*/
//package atorrentapi;
class Main {
/**
* Compute the SHA-1 hash of the given byte array
*
* @param hashThis
* byte[]
* @return byte[]
*/
public static byte[] hash(byte[] hashThis) {
try {
byte[] hash = new byte[20];
MessageDigest md = MessageDigest.getInstance("SHA-1");
hash = md.digest(hashThis);
return hash;
} catch (NoSuchAlgorithmException nsae) {
System.err.println("SHA-1 algorithm is not available...");
System.exit(2);
}
return null;
}
}