DES及其3种改进版CBC，CFB，OFB加密模式编程实现（java）

import java.awt.BorderLayout; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; public class Main { public static void main(String[] args) { // 图形界面结果 new PrjView(); /* * // 命令行界面结果 int choice; String algorithm = "DES/ECB/noPadding"; String * message = "123"; String keyStr = "123"; String iv = "123"; long * runTime = 0; * * while (true) { choice = choose(); * * switch (choice) { case 1: System.out.println("DES加密模式："); runTime = * System.currentTimeMillis(); DesEn de = new DesEn(algorithm, keyStr, * message.getBytes()); byte[] msgDes = de.CipherMsg(); * * System.out.println("加密后的密文为：" + new String(msgDes)); * System.out.println("解密密文为：" + new String(de.EncipherMsg(msgDes, * keyStr)).trim()); runTime = System.currentTimeMillis() - runTime; * System.out.println("程序执行了" + runTime + "毫秒。"); System.out.println(); * break; case 2: System.out.println("CBC加密模式："); runTime = * System.currentTimeMillis(); CbcEn ce = new CbcEn(algorithm, keyStr, * iv, message.getBytes()); byte[] msgCbc = ce.CipherMsg(); * System.out.println("加密后的密文为：" + new String(msgCbc)); System.out * .println("解密密文为：" + new String(ce.EncipherMsg(msgCbc, iv, keyStr)) * .trim()); runTime = System.currentTimeMillis() - runTime; * System.out.println("程序执行了" + runTime + "毫秒。"); System.out.println(); * break; case 3: System.out.println("CFB加密模式："); runTime = * System.currentTimeMillis(); CfbEn cfe = new CfbEn(algorithm, keyStr, * iv, message.getBytes()); byte[] msgCfb = cfe.CipherMsg(); * System.out.println("加密后的密文为：" + new String(msgCfb)); * System.out.println("解密密文为：" + new String(cfe.EncipherMsg(msgCfb, iv, * keyStr)) .trim()); runTime = System.currentTimeMillis() - runTime; * System.out.println("程序执行了" + runTime + "毫秒。"); System.out.println(); * break; case 4: System.out.println("OFB加密模式："); runTime = * System.currentTimeMillis(); OfbEn ofe = new OfbEn(algorithm, keyStr, * iv, message.getBytes()); byte[] msgOfb = ofe.CipherMsg(); * System.out.println("加密后的密文为：" + new String(msgOfb)); * System.out.println("解密密文为：" + new String(ofe.EncipherMsg(msgOfb, iv, * keyStr)) .trim()); runTime = System.currentTimeMillis() - runTime; * System.out.println("程序执行了" + runTime + "毫秒。"); System.out.println(); * break; default: System.out.println("未选择加密模式，程序退出。"); System.exit(0); * } } */ } /* * public static int choose() { int choice = 0; * System.out.println("请输入选项符号选择加密模式。"); System.out.println("1:DES加密"); * System.out.println("2:CBC加密"); System.out.println("3:CFB加密"); * System.out.println("4:OFB加密"); System.out.println("其他:退出程序"); * BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); * String line; System.out.flush(); try { line = br.readLine(); choice = * Integer.parseInt(line); } catch (IOException e) { // TODO Auto-generated * catch block e.printStackTrace(); } catch (NumberFormatException e) { // * TODO: handle exception System.out.println("输入非数字字符！程序退出。"); * System.exit(0); } return choice; } */ } @SuppressWarnings("serial") class PrjView extends JFrame implements ActionListener { // 定义准备让用户输入加密字符串、秘钥以及种子的控件 private JLabel lblMsg; private JLabel lblKeyStr; private JLabel lblIv; private JTextField msg; private JTextField keyStr; private JTextField seed; // 定义显示密文以及解密结果的控件 private JLabel lblCipher; private JTextField cipherText; private JLabel lblEnCipher; private JTextField enCipherText; // 选择加密方式的按钮 private JButton btnDes; private JButton btnCbc; private JButton btnCfb; private JButton btnOfb; // 显示加密解密运行时间的控件 private JLabel lblRunTime; private JTextField runTime; private JLabel lblUnit; public PrjView() { // 布局方式 this.setLayout(new FlowLayout()); // 输入欲加密字符串 JPanel p1 = new JPanel(); p1.setLayout(new BorderLayout()); lblMsg = new JLabel("欲加密字符串:"); msg = new JTextField(20); p1.add(lblMsg, BorderLayout.WEST); p1.add(msg, BorderLayout.EAST); // 输入加密秘钥，秘钥只有前8字节有效，不够8字节末尾补零 JPanel p2 = new JPanel(); p2.setLayout(new BorderLayout()); lblKeyStr = new JLabel("加密密钥："); keyStr = new JTextField(20); p2.add(lblKeyStr, BorderLayout.WEST); p2.add(keyStr, BorderLayout.EAST); // 输入初始加密种子，只有前8字节有效，不够8字节末尾补零 JPanel ps = new JPanel(); ps.setLayout(new BorderLayout()); lblIv = new JLabel("初始种子："); seed = new JTextField(20); ps.add(lblIv, BorderLayout.WEST); ps.add(seed, BorderLayout.EAST); // 按钮，选择加密方式 JPanel p3 = new JPanel(); p3.setLayout(new FlowLayout()); btnDes = new JButton("DES加密"); btnDes.addActionListener(this); btnCbc = new JButton("CBC加密"); btnCbc.addActionListener(this); btnCfb = new JButton("CFB加密"); btnCfb.addActionListener(this); btnOfb = new JButton("OFB加密"); btnOfb.addActionListener(this); p3.add(btnDes); p3.add(btnCbc); p3.add(btnCfb); p3.add(btnOfb); // 显示加密密文 JPanel p4 = new JPanel(); p4.setLayout(new FlowLayout()); lblCipher = new JLabel("密文："); cipherText = new JTextField(20); cipherText.setEditable(false); p4.add(lblCipher); p4.add(cipherText); // 显示解密明文 JPanel p5 = new JPanel(); p5.setLayout(new FlowLayout()); lblEnCipher = new JLabel("解密結果："); enCipherText = new JTextField(20); enCipherText.setEditable(false); p5.add(lblEnCipher); p5.add(enCipherText); // 显示程序运行时间 JPanel p6 = new JPanel(); p6.setLayout(new FlowLayout()); lblRunTime = new JLabel("加密解密过程运行时间："); runTime = new JTextField(5); runTime.setEditable(false); lblUnit = new JLabel("毫秒"); p6.add(lblRunTime); p6.add(runTime); p6.add(lblUnit); // 添加控件至主面板 this.add(p1); this.add(p2); this.add(ps); this.add(p3); this.add(p4); this.add(p5); this.add(p6); this.setLocation(400, 300); this.setSize(400, 280); this.setTitle("4种DES加密方式"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } // 按钮事件监听函数 public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub String algorithm = "DES/ECB/Nopadding";// DES加密模式参数 String message = "";// 欲加密字符串 String keyString = "";// 秘钥 String iv = "";// 初始种子 long time = 0;// 加密解密时间 // 判断是否输入了加密字符串或密钥 if (msg.getText().equals("") || keyStr.getText().equals("")) { JOptionPane.showMessageDialog(this, "请检查是否输入了加密字符串或密钥"); return; } message = msg.getText(); keyString = keyStr.getText(); iv = seed.getText(); // DES加密 if (e.getActionCommand().equals("DES加密")) { time = System.currentTimeMillis(); DesEn de = new DesEn(algorithm, keyString, message.getBytes()); byte[] msgDes = de.CipherMsg(); cipherText.setText(new String(msgDes)); enCipherText.setText(new String(de.EncipherMsg(msgDes, keyString)) .trim()); time = System.currentTimeMillis() - time; runTime.setText("" + time); } else { // 非原始DES加密，判断是否输入初始种子 if (seed.getText().equals("")) { JOptionPane.showMessageDialog(this, "请检查是否输入了初始种子"); return; } // CBC加密 if (e.getActionCommand().equals("CBC加密")) { time = System.currentTimeMillis(); CbcEn de = new CbcEn