EircomKeygen.java

/*
 * Copyright 2012 Rui Araújo, Luís Fonseca
 *
 * This file is part of Router Keygen.
 *
 * Router Keygen 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.
 * 
 * Router Keygen 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 Router Keygen.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.exobel.routerkeygen.algorithms;

import android.os.Parcel;
import android.os.Parcelable;

import org.exobel.routerkeygen.R;
import org.exobel.routerkeygen.utils.StringUtils;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;

/*
 * Eircom algorithm published here:
 * http://www.bacik.org/eircomwep/howto.html
 */
public class EircomKeygen extends Keygen {

    public static final Parcelable.Creator<EircomKeygen> CREATOR = new Parcelable.Creator<EircomKeygen>() {
        public EircomKeygen createFromParcel(Parcel in) {
            return new EircomKeygen(in);
        }

        public EircomKeygen[] newArray(int size) {
            return new EircomKeygen[size];
        }
    };

    public EircomKeygen(String ssid, String mac) {
        super(ssid, mac);
    }


    private EircomKeygen(Parcel in) {
        super(in);
    }

    @Override
    public List<String> getKeys() {
        String mac = getMacAddress().substring(6);
        MessageDigest md;
        try {
            md = MessageDigest.getInstance("SHA1");
        } catch (NoSuchAlgorithmException e1) {
            setErrorCode(R.string.msg_nosha1);
            return null;
        }
        byte[] routerMAC = new byte[4];
        routerMAC[0] = 1;
        for (int i = 0; i < 6; i += 2)
            routerMAC[i / 2 + 1] = (byte) ((Character.digit(mac.charAt(i), 16) << 4)
                    + Character.digit(mac.charAt(i + 1), 16));
        int macDec = ((0xFF & routerMAC[0]) << 24) | ((0xFF & routerMAC[1]) << 16) |
                ((0xFF & routerMAC[2]) << 8) | (0xFF & routerMAC[3]);
        mac = StringUtils.dectoString(macDec) + "Although your world wonders me, ";
        md.reset();
        md.update(mac.getBytes());
        byte[] hash = md.digest();
        try {
            addPassword(StringUtils.getHexString(hash).substring(0, 26));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return getResults();
    }
}