ComtrendKeygen.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;
import java.util.Locale;

public class ComtrendKeygen extends Keygen {

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

        public ComtrendKeygen[] newArray(int size) {
            return new ComtrendKeygen[size];
        }
    };
    private static final String magic = "bcgbghgg";
    private static final String lowermagic = "64680C";
    private static final String highermagic = "3872C0";
    private static final String mac001a2b = "001A2B";

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

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

    @Override
    public List<String> getKeys() {
        final String ssidIdentifier = getSsidName().substring(
                getSsidName().length() - 4);
        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 {
            if (mac.substring(0, 6).equalsIgnoreCase(mac001a2b)) {
                for (int i = 0; i < 512; i++) {
                    md.reset();
                    md.update(magic.getBytes("ASCII"));
                    String xx;
                    if (i < 256) {
                        md.update(lowermagic.getBytes("ASCII"));
                        xx = Integer.toHexString(i).toUpperCase(Locale.US);
                    } else {
                        md.update(highermagic.getBytes("ASCII"));
                        xx = Integer.toHexString(i - 256).toUpperCase(Locale.US);
                    }
                    while (xx.length() < 2)
                        xx = "0" + xx;
                    md.update(xx.getBytes("ASCII"));
                    md.update(ssidIdentifier.getBytes("ASCII"));
                    md.update(mac.getBytes("ASCII"));
                    byte[] hash = md.digest();
                    addPassword(StringUtils.getHexString(hash).substring(0, 20));
                }
            } else {
                final String macMod = mac.substring(0, 8) + ssidIdentifier;
                md.reset();
                md.update(magic.getBytes("ASCII"));
                md.update(macMod.toUpperCase(Locale.getDefault()).getBytes(
                        "ASCII"));
                md.update(mac.toUpperCase(Locale.getDefault())
                        .getBytes("ASCII"));
                byte[] hash = md.digest();
                addPassword(StringUtils.getHexString(hash).substring(0, 20));

            }
            return getResults();
        } catch (UnsupportedEncodingException e) {
        }
        return null;
    }

}