Wlan2Keygen.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 java.util.List;

/**
 * <b>This only calculates the keys for some WLAN_xx</b>
 * <br>
 * <p/>
 * Many WLAN_XX don't use this algorithm.
 * Code by Kampanita
 */

public class Wlan2Keygen extends Keygen {

    public static final Parcelable.Creator<Wlan2Keygen> CREATOR = new Parcelable.Creator<Wlan2Keygen>() {
        public Wlan2Keygen createFromParcel(Parcel in) {
            return new Wlan2Keygen(in);
        }

        public Wlan2Keygen[] newArray(int size) {
            return new Wlan2Keygen[size];
        }
    };
    final private String ssidIdentifier;

    public Wlan2Keygen(String ssid, String mac) {
        super(ssid, mac);
        ssidIdentifier = ssid.substring(ssid.length() - 2);
    }


    private Wlan2Keygen(Parcel in) {
        super(in);
        ssidIdentifier = in.readString();
    }

    @Override
    public List<String> getKeys() {
        char[] key = new char[26];
        if (getMacAddress().length() != 12) {
            setErrorCode(R.string.msg_errpirelli);
            return null;
        }
        key[0] = getMacAddress().charAt(10);
        key[1] = getMacAddress().charAt(11);
        key[2] = getMacAddress().charAt(0);
        key[3] = getMacAddress().charAt(1);
        key[4] = getMacAddress().charAt(8);
        key[5] = getMacAddress().charAt(9);
        key[6] = getMacAddress().charAt(2);
        key[7] = getMacAddress().charAt(3);
        key[8] = getMacAddress().charAt(4);
        key[9] = getMacAddress().charAt(5);
        key[10] = getMacAddress().charAt(6);
        key[11] = getMacAddress().charAt(7);
        key[12] = getMacAddress().charAt(10);
        key[13] = getMacAddress().charAt(11);
        key[14] = getMacAddress().charAt(8);
        key[15] = getMacAddress().charAt(9);
        key[16] = getMacAddress().charAt(2);
        key[17] = getMacAddress().charAt(3);
        key[18] = getMacAddress().charAt(4);
        key[19] = getMacAddress().charAt(5);
        key[20] = getMacAddress().charAt(6);
        key[21] = getMacAddress().charAt(7);
        key[22] = getMacAddress().charAt(0);
        key[23] = getMacAddress().charAt(1);
        key[24] = getMacAddress().charAt(4);
        key[25] = getMacAddress().charAt(5);

        int max = 9;
        String begin = ssidIdentifier.substring(0, 1);
        int primer_n = Integer.parseInt(begin, 16);
        if (primer_n > max) {
            String cadena = String.valueOf(key, 0, 2);
            int value = Integer.parseInt(cadena, 16);
            value = value - 1;
            String cadena2 = Integer.toHexString(value);
            if (cadena2.length() < 2)
                cadena2 = "0" + cadena2;
            key[0] = cadena2.charAt(0);
            key[1] = cadena2.charAt(1);
        }

        addPassword(String.valueOf(key, 0, 26));
        return getResults();
    }

    public void writeToParcel(Parcel dest, int flags) {
        super.writeToParcel(dest, flags);
        dest.writeString(ssidIdentifier);
    }

}