de.aw.monma.hbci.FragmentMasterPassword.java Source code

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Here is the source code for de.aw.monma.hbci.FragmentMasterPassword.java

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/*
 * MonMa: Eine freie Android-Application fuer die Verwaltung privater Finanzen
 *
 * Copyright [2015] [Alexander Winkler, 2373 Dahme/Germany]
 *
 * This program 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.
 *
 * This program 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 this program; if
 * not, see <http://www.gnu.org/licenses/>.
 */
package de.aw.monma.hbci;
/**
 * Created by alex on 20.08.2016.
 */

import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.util.Base64;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

import de.aw.awlib.application.AWApplication;
import de.aw.awlib.security.AWAESEncrypter;
import de.aw.monma.R;

/**
 * LoginFragment
 */
public class FragmentMasterPassword extends DialogFragment implements View.OnClickListener {
    private int layout = R.layout.fragment_login;
    private byte[] mKey;
    private TextView newPasswordView;
    private TextView passwordView;
    private SharedPreferences prefs;

    @Override
    public void onClick(View v) {
        String password = passwordView.getText().toString().trim();
        String newPassword = newPasswordView.getText().toString().trim();
        if (mKey == null) {
            if (password.equals(newPassword)) {
                try {
                    mKey = AWAESEncrypter.generateKey(password);
                    SharedPreferences.Editor editor = prefs.edit();
                    String key = Base64.encodeToString(mKey, Base64.NO_WRAP);
                    editor.putString(getString(R.string.key), key).apply();
                } catch (Exception e) {
                    //TODO Execption bearbeiten
                    e.printStackTrace();
                }
            } else {
                passwordView.setText(null);
                passwordView.requestFocus();
                newPasswordView.setText(null);
                newPasswordView.setError(getString(R.string.passwordNichtIdentischError));
                return;
            }
        }
        if (AWAESEncrypter.checkPassword(password, mKey)) {
            dismiss();
        } else {
            passwordView.setText(null);
            passwordView.setError(getString(R.string.passwordError));
        }
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
            @Nullable Bundle savedInstanceState) {
        return inflater.inflate(layout, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        passwordView = view.findViewById(R.id.etPassword);
        passwordView.setOnEditorActionListener(new EditText.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_DONE) {
                    onClick(passwordView);
                    return true;
                }
                return false;
            }
        });
        newPasswordView = view.findViewById(R.id.etNewPassword);
        AWApplication.Log("Passwort Abfrage gestartet");
        String key = prefs.getString(getString(R.string.key), null);
        if (key != null) {
            mKey = Base64.decode(key, Base64.NO_WRAP);
        }
        if (mKey != null) {
            newPasswordView.setVisibility(View.GONE);
        }
        view.findViewById(R.id.loginBtn).setOnClickListener(this);
    }
}