hostage/src/de/tudarmstadt/informatik/hostage/ui2/fragment/SettingsFragment.java

package de.tudarmstadt.informatik.hostage.ui2.fragment;

import android.app.AlertDialog;
import android.app.DownloadManager;
import android.app.DownloadManager.Query;
import android.app.DownloadManager.Request;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.channels.FileChannel;
import java.util.zip.ZipInputStream;

import de.tudarmstadt.informatik.hostage.Hostage;
import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.system.Decompress;
import de.tudarmstadt.informatik.hostage.system.Device;
import de.tudarmstadt.informatik.hostage.ui2.activity.MainActivity;

/**
 * Creates the view to edit the preferences of the app and shows the porthack and rooted state of the device
 *
 * @author Alexander Brakowski
 * @created 24.02.14 23:37
 */
public class SettingsFragment extends UpNavigatibleFragment {

	/**
	 * {@inheritDoc}
	 */

    private long enqueue;
    private DownloadManager dm;
    private BroadcastReceiver receiver;
    /**
     * Hold the shared preferences for the app
     */
    private SharedPreferences mSharedPreferences;

    public void portbinderAlert(final SharedPreferences.Editor editor){
        new AlertDialog.Builder(getActivity())
                .setTitle(R.string.information)
                .setMessage(R.string.no_portbinder_msg)
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {

                    }
                })
                .setNegativeButton(R.string.no_thanks, new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                //never show this to users again
                                if (editor != null) {
                                    editor.putBoolean("donotshowagain", true);
                                    editor.commit(); //commit if any changes on the preferences
                                }
                            }
                        }
                )
                .setNeutralButton(R.string.how, new DialogInterface.OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        final AlertDialog alert;

                        new AlertDialog.Builder(getActivity())
                                .setTitle(R.string.portbinder)
                                .setMessage(R.string.helpPortbinder)
                                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which) {

                                    }
                                })
                                .setNegativeButton(R.string.portbinder_website, new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which) {

                                        Uri uri = Uri.parse("https://www.tk.informatik.tu-darmstadt.de/de/research/secure-smart-infrastructures/hostage/");
                                        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                                        startActivity(intent);

                                    }
                                })
                                        //Testing automated installation of portbinder
                                .setNeutralButton(R.string.help_me, new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which) {
                                        dialog.dismiss();

                                        new AlertDialog.Builder(getActivity())
                                                .setTitle(R.string.portbinder)
                                                .setMessage(R.string.confirm_msg)
                                                .setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
                                                    public void onClick(DialogInterface dialog, int which) {
                                                        //Download Portbinder
                                                        dm = (DownloadManager) getActivity().getSystemService(Context.DOWNLOAD_SERVICE);

                                                        //Identify architecture
                                                        String arch = System.getProperty("os.arch"); //get the device architecture
                                                        String fileName = "";

                                                        //selecting necessary PortBinder architecture
                                                        if (arch.matches("arm.*"))      //arm
                                                            fileName = "bind-arm.zip";
                                                        else if (arch.matches("x86"))   //x86
                                                            fileName = "bind-x86.zip";
                                                        else if (arch.matches("mips"))  //mips
                                                            fileName = "bind-mips.zip";

                                                        Uri uri = Uri.parse("https://www.tk.informatik.tu-darmstadt.de/fileadmin/user_upload/Group_TK/"+fileName);

                                                        if (!fileName.isEmpty()) //As long we have a valid string (non-empty)
                                                        {
                                                            Request request = new Request(uri)
                                                                    .setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
                                                            enqueue = dm.enqueue(request);
                                                        }
                                                        else {
                                                            //report to user of an unknown architecture
                                                        }

                                                    }
                                                })
                                                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                                                    public void onClick(DialogInterface dialog, int which) {



                                                    }
                                                })
                                                .setIcon(android.R.drawable.ic_dialog_alert).show();
                                                ;

                                    }
                                })
                                .setIcon(android.R.drawable.ic_dialog_info).show();

                    }
                })
                .setIcon(android.R.drawable.ic_dialog_info).show();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		super.onCreateView(inflater, container, savedInstanceState);
		getActivity().setTitle(getResources().getString(R.string.drawer_settings));
		View v = inflater.inflate(R.layout.fragment_settings, container, false);

        mSharedPreferences = getActivity().getSharedPreferences(getString(R.string.shared_preference_path), Hostage.MODE_PRIVATE);
        final SharedPreferences.Editor editor = mSharedPreferences.edit();

		final TextView rootedText = (TextView) v.findViewById(R.id.settings_device_rooted);
		final TextView porthackText = (TextView) v.findViewById(R.id.settings_porthack_installed);

		if (Device.isRooted()) {
			rootedText.setText(R.string.yes);
			rootedText.setTextColor(getResources().getColor(R.color.holo_dark_green));
		} else {
			rootedText.setText(R.string.no);
			rootedText.setTextColor(getResources().getColor(R.color.holo_red));
		}

		if (Device.isPorthackInstalled()) {
			porthackText.setText(R.string.yes);
			porthackText.setTextColor(getResources().getColor(R.color.holo_dark_green));
		} else {

            if (!mSharedPreferences.getBoolean("donotshowagain", false))
                portbinderAlert(editor);

			porthackText.setText(R.string.no);
			porthackText.setTextColor(getResources().getColor(R.color.holo_red));
		}

        //Handle if a download 'may' be needed
        receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
                    long downloadId = intent.getLongExtra(
                            DownloadManager.EXTRA_DOWNLOAD_ID, 0);
                    Query query = new Query();
                    query.setFilterById(enqueue);
                    Cursor c = dm.query(query);
                    if (c.moveToFirst()) {
                        int columnIndex = c
                                .getColumnIndex(DownloadManager.COLUMN_STATUS);
                        if (DownloadManager.STATUS_SUCCESSFUL == c
                                .getInt(columnIndex)) {

                            String downloadFile = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
                            String makeWritable[]= {"su","-c","chmod","777","/data/local"}; //change permission to allow rw access from x only
                            String allowExec[]= {"su","-c","chmod","711","/data/local/bind"}; //change permission to allow x access
                            String revert[]= {"su","-c","chmod","751","/data/local"}; //change permission back to x only

                            try {
                                //Chmod the local directory for write access
                                Process process = Runtime.getRuntime().exec(makeWritable);
                                process.waitFor();

                                Log.d("portbinder:","Changing permission on /data/local to allow write access");

                                //Decompressing downloaded zip to local directory
                                Decompress dwnld = new Decompress(downloadFile,"/data/local/" );
                                dwnld.unzip();
                                Log.v("portbinder:","Decompressing downloaded file");

                                //Chmod the Portbinder to allow it to be executable
                                process = Runtime.getRuntime().exec(allowExec);
                                process.waitFor();
                                Log.v("portbinder:","Changing permission on /data/local/bind to allow the binary to be executed");

                                //Chmod the local directory to back to non-read/write access
                                process = Runtime.getRuntime().exec(revert);
                                process.waitFor();
                                Log.v("portbinder:","Changing permission on /data/local back to no-write access");


                            } catch (IOException e) {
                                e.printStackTrace();
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }

                            if(Device.updatePorthack()) //if successful
                            {
                                porthackText.setText(R.string.yes);
                                porthackText.setTextColor(getResources().getColor(R.color.holo_dark_green));
                            }

                        }
                    }
                }
            }
        };

        getActivity().registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

            return v;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);

		FragmentManager manager = this.getFragmentManager();
		manager.beginTransaction().replace(R.id.settings_fragment_container, new PreferenceHostageFrament()).commit();
	}

    /**
     * {@inheritDoc}
     */
    @Override
    public void onDestroy() {
        super.onDestroy();
        getActivity().unregisterReceiver(receiver);

    }

}