Java tutorial
/** * This file is part of PaxmlCore. * * PaxmlCore is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * PaxmlCore 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with PaxmlCore. If not, see <http://www.gnu.org/licenses/>. */ package org.paxml.security; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import org.apache.commons.lang3.StringUtils; import org.paxml.util.CryptoUtils; public class SecretRepository { private static final ConcurrentMap<String, String> masterKeys = new ConcurrentHashMap<String, String>(); public static String getCurrentUser() { return ""; } // TODO: make it not synchronized when supporting web user sessions public synchronized static String getCurrentUserMasterKey() { final String currentUser = getCurrentUser(); String key = masterKeys.get(currentUser); if (key != null) { return CryptoUtils.decrypt(CryptoUtils.base64Decode(key), currentUser); } key = askForCurrentUserMasterKey(); if (key != null) { masterKeys.put(currentUser, CryptoUtils.base64Encode(CryptoUtils.encrypt(key, currentUser))); } return key; } public static String askForCurrentUserMasterKey() { return askForPasswordInput("Please enter secret store password"); } public static String askForSecretValue(String secreyKey) { return askForPasswordInput( "Please enter secret" + (StringUtils.isBlank(secreyKey) ? "" : " for: " + secreyKey)); } public static String askForPasswordInput(String question) { class DummyFrame extends JFrame { DummyFrame(String title) { super(title); setUndecorated(true); setVisible(true); setLocationRelativeTo(null); } } JPasswordField pf = new JPasswordField(); int okCxl = JOptionPane.showConfirmDialog(new DummyFrame(question), pf, question, JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE); if (okCxl == JOptionPane.OK_OPTION) { return new String(pf.getPassword()); } return null; } }