AliceGermanyKeygen.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.Base64;
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;
import java.util.Locale;

/**
 * The algortihm is described on the link below
 * Link:http://www.wardriving-forum.de/wiki/Standardpassw%C3%B6rter#ALICE
 *
 * @author Rui Araújo
 */
public class AliceGermanyKeygen extends Keygen {

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

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

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

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

    @Override
    public int getSupportState() {
        if (getSsidName().matches("ALICE-WLAN[0-9a-fA-F]{2}"))
            return SUPPORTED;
        return UNLIKELY_SUPPORTED;
    }

    @Override
    public List<String> getKeys() {
        MessageDigest md;
        try {
            md = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e1) {
            setErrorCode(R.string.msg_nomd5);
            return null;
        }
        final String mac = getMacAddress();
        if (mac.length() != 12) {
            setErrorCode(R.string.msg_errpirelli);
            return null;
        }
        try {
            int macEthInt = Integer.parseInt(mac.substring(6), 16) - 1;
            if (macEthInt < 0)
                macEthInt = 0xFFFFFF;
            String macEth = Integer.toHexString(macEthInt);
            while (macEth.length() < 6)
                macEth = "0" + macEth;
            macEth = mac.substring(0, 6) + macEth;
            md.reset();
            md.update(macEth.toLowerCase(Locale.getDefault()).getBytes("ASCII"));
            final byte[] hash = StringUtils.getHexString(md.digest())
                    .substring(0, 12).getBytes("ASCII");
            addPassword(Base64.encodeToString(hash, Base64.DEFAULT).trim());
            return getResults();
        } catch (UnsupportedEncodingException e) {
        }
        return null;
    }

}