Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2010-12  Ciaran Gultnieks, ciaran@ciarang.com
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import android.util.Log;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    public static String hashBytes(byte[] input, String algo) {
        try {
            MessageDigest md = MessageDigest.getInstance(algo);
            byte[] hashBytes = md.digest(input);
            String hash = toHexString(hashBytes);

            md.reset();
            return hash;
        } catch (NoSuchAlgorithmException e) {
            Log.e("FDroid", "Device does not support " + algo + " MessageDisgest algorithm");
            return null;
        }
    }

    /**
     * Computes the base 16 representation of the byte array argument.
     *
     * @param bytes an array of bytes.
     * @return the bytes represented as a string of hexadecimal digits.
     */
    public static String toHexString(byte[] bytes) {
        BigInteger bi = new BigInteger(1, bytes);
        return String.format("%0" + (bytes.length << 1) + "X", bi);
    }
}