Java tutorial
/* Copyright 2015 Pablo Arrighi, Sarah Boukris, Mehdi Chtiwi, Michael Dubuis, Kevin Perrot, Julien Prudhomme. This file is part of SXP. SXP is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 3. SXP 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with SXP. If not, see <http://www.gnu.org/licenses/>. */ package model.data.favorites; import java.util.ArrayList; import model.advertisement.AbstractAdvertisement; import model.data.item.Category; import model.data.item.Item; import model.data.item.Item.TYPE; import model.data.user.User; import org.jdom2.Element; import util.Hexa; import util.StringToElement; import util.secure.AsymKeysImpl; import util.secure.Serpent; /** * This class can be instantiated for contains item favorite. * This class extends AbstractAdvertisement and can be used like an advertisement. * @author michael * */ public class Favorites extends AbstractAdvertisement { private ArrayList<String> itemsKey; private boolean crypted; ///////////////////////////////////////////////// CONSTRUCTORS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ public Favorites(User owner) { super(); if (owner == null) { printError("Favorites", "User empty"); return; } if (owner.getKeys() == null || owner.getKeys().getPublicKey() == null) { printError("Favorites", "User haven't publicKey"); return; } this.setKeys(owner.getKeys()); } public Favorites(Element e) { super(e); } public Favorites(String XML) { super(XML); } //////////////////////////////////////////////////// GETTERS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ public String getOwner() { return getKeys().getPublicKey().toString(16); } public ArrayList<String> getItemsKey() { return itemsKey; } public boolean isCrypted() { return crypted; } //////////////////////////////////////////////////// SETTERS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ public boolean addItem(Item item) { if (item == null) return printError("addItem", "Item empty"); if (item.getOwner() == null || item.getOwner().isEmpty()) return printError("addItem", "Item haven't owner"); if (itemsKey == null) itemsKey = new ArrayList<String>(); if (crypted) return printError("addItem", "Favorites is encrypted"); return itemsKey.add(item.getItemKey()); } public boolean addItem(String itemKey) { if (itemKey == null || itemKey.isEmpty()) return printError("addItem", "itemKey is null or empty"); if (crypted) return printError("addItem", "Favorites is encrypted"); return itemsKey.add(itemKey); } public void setCrypted(boolean crypted) { this.crypted = crypted; } //////////////////////////////////////////////////// REMOVER \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ public boolean removeItem(Item item) { if (item == null) return printError("removeItem", "Item empty"); if (crypted) return printError("removeItem", "Favorites is encrypted"); String itemKey = item.getItemKey(); return itemsKey.remove(itemKey); } public boolean removeItem(String itemKey) { if (itemKey == null || itemKey.isEmpty()) return printError("removeItem", "itemKey null or empty"); if (crypted) return printError("removeItem", "Favorites is encrypted"); return itemsKey.remove(itemKey); } //////////////////////////////////////////////////// OTHERS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ public void encrypt(String password) { if (password == null || password.isEmpty()) { printError("encrypt", "password null or empty"); return; } if (crypted) { printError("encrypt", "Favorites already encrypted"); return; } ArrayList<String> itemsKeyCrypted = new ArrayList<String>(); Serpent s = new Serpent(password); for (String i : itemsKey) { itemsKeyCrypted.add(Hexa.bytesToHex(s.encrypt(i.getBytes()))); } itemsKey = new ArrayList<String>(); itemsKey.addAll(itemsKeyCrypted); crypted = true; printInfo("encrypt", "Favorites items encrypted"); } public void decrypt(String password) { if (password == null || password.isEmpty()) { printError("encrypt", "password null or empty"); return; } if (!crypted) { printError("decrypt", "Favorites already decrypted"); return; } Serpent s = new Serpent(password); if (password == null || password.isEmpty()) { printError("decrypt", "password null or empty"); return; } ArrayList<String> itemsKeyCrypted = new ArrayList<String>(); itemsKeyCrypted.addAll(itemsKey); itemsKey = new ArrayList<String>(); for (String b : itemsKeyCrypted) { String i = new String(s.decrypt(Hexa.hexToBytes(b))); itemsKey.add(i); } itemsKeyCrypted = null; crypted = false; printInfo("decrypt", "Favorites items decrypted"); } //////////////////////////////////////////////////// PRINTER \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ private static boolean printError(String method, String error) { System.err.println("ERROR : " + Favorites.class.getName() + "." + method + " : " + error); return false; } private static void printInfo(String method, String info) { System.out.println("INFO : " + Favorites.class.getName() + "." + method + " : " + info); } ////////////////////////////////////////////////////// XML \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ private String itemsKeyXML() { StringBuffer s = new StringBuffer(); for (String i : itemsKey) { s.append("<itemKey>"); s.append(i); s.append("</itemKey>"); } return s.toString(); } private void loadItemsKey(Element e) { Element root = StringToElement.getElementFromString(e.getValue(), e.getName()); if (itemsKey == null) itemsKey = new ArrayList<String>(); for (Element i : root.getChildren()) { String itemKey = new String(i.getValue()); itemsKey.add(itemKey); } } private void loadCrypted(String val) { if (val.toLowerCase().equals("true")) this.setCrypted(true); } ///////////////////////////////////////////////// ADVERTISEMENT \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ @Override protected String getAdvertisementName() { return getClass().getName(); } @Override protected void setKeys() { itemsKey = new ArrayList<String>(); crypted = false; this.addKey("itemsKey", false, true); this.addKey("crypted", false, false); } @Override protected void putValues() { this.addValue("itemsKey", this.itemsKeyXML()); this.addValue("crypted", String.valueOf(crypted)); } @Override protected boolean handleElement(Element e) { String val = e.getText(); switch (e.getName()) { case "itemsKey": this.loadItemsKey(e); break; case "crypted": this.loadCrypted(val); break; default: return false; } return true; } /////////////////////////////////////////////////// OVERRIDE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ @Override public boolean equals(Object f) { if (!(f instanceof Favorites)) return false; Favorites favorites = (Favorites) f; if (!this.getOwner().equals(favorites.getOwner())) return false; return true; } public static void main(String[] args) { User user = new User("nick", "passWord", "name", "firstName", "email", "phone"); Item item = new Item(user, "title", new Category("NA"), "description", "image", "country", "contact", 0L, 0L, TYPE.OFFER); Favorites f = new Favorites(user); f.addItem(item); f.sign(user.getKeys()); System.out.println(f.checkSignature(user.getKeys())); } @Override public String getSimpleName() { return getClass().getSimpleName(); } }