FileEncrypter.rar_FileEncrypter.ja_des ja_triple DES_triple DES

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import java.security.*; import javax.crypto.*; import javax.crypto.spec.*; //================================================================================================================================ //构造窗体，注册事件监听，事件响应 public class FileEncrypter extends JFrame { public static final int WIDTH = 550; public static final int HEIGHT = 200; public static AbstractButton button; FileEncrypter() { setSize(WIDTH,HEIGHT); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setResizable(false); Toolkit tk = Toolkit.getDefaultToolkit(); final Dimension screenSize = tk.getScreenSize(); setLocation((screenSize.width - WIDTH)/2, (screenSize.height - HEIGHT)/2); setTitle("文件加密器"); final Container c = this.getContentPane(); c.setLayout( new FlowLayout()); JMenuBar bar = new JMenuBar(); JMenu setting,help; setting = new JMenu ("设置(S)"); help = new JMenu ("帮助(H)"); JMenuItem about; about = new JMenuItem("关于...",KeyEvent.VK_A); about.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { JDialog d = new JDialog(); d.setTitle("关于FileEncrypter"); d.setLocation((screenSize.width - WIDTH + 200)/2, (screenSize.height - HEIGHT)/2); d.setSize(350,200); JPanel p=new JPanel(); p.setLayout(new GridLayout(5,1)); d.add(p); JLabel userName=new JLabel(" 本机的用户名为："+System.getProperty("user.name")); JLabel osName=new JLabel(" 本机的操作系统是："+System.getProperty("os.name")); JLabel javaVersion=new JLabel(" 本机中所安装的Java SDK的版本号是："+System.getProperty("java.version")); p.add(new JLabel(" FileEncrypter程序 ")); p.add(osName); p.add(userName); p.add(javaVersion); p.add(new JLabel(" 200610404141 马宗骁")); getDefaultCloseOperation(); d.setResizable(false); d.setVisible(true); } }); JRadioButtonMenuItem specialRadio1 = new JRadioButtonMenuItem("替代加密算法"); JRadioButtonMenuItem specialRadio2 = new JRadioButtonMenuItem("三重DES加密算法"); class ItemHandler implements ItemListener { public void itemStateChanged(ItemEvent e) { button = (AbstractButton) e.getItem(); } } specialRadio1.addItemListener(new ItemHandler()); specialRadio2.addItemListener(new ItemHandler()); ButtonGroup buttonGroup1 = new ButtonGroup(); bar.add(setting); setting.setMnemonic(KeyEvent.VK_F); bar.add(help); help.setMnemonic(KeyEvent.VK_H); setting.add(specialRadio1); setting.add(specialRadio2); buttonGroup1.add(specialRadio1); buttonGroup1.add(specialRadio2); help.add(about); setJMenuBar (bar); final FilePanel fp = new FilePanel("文件选择"); c.add(fp); final KeyPanel pp = new KeyPanel(" 密码 "); c.add(pp); JButton jbE = new JButton("加密"); c.add(jbE); jbE.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { if(button == null) JOptionPane.showMessageDialog(null,"请选择加密方式！","提示",JOptionPane.OK_OPTION); else { File file = new File(fp.getFileName()); if (file.exists()&&button.getText().equals("三重DES加密算法")) encrypt_des(file.getAbsoluteFile(),pp.getKey()); else if(file.exists()&&button.getText().equals("替代加密算法")) encrypt_tidai(file.getAbsoluteFile(),pp.getKey()); else JOptionPane.showMessageDialog(null,"请选择文件！","提示",JOptionPane.OK_OPTION); } } }); JButton jbD = new JButton("解密"); c.add(jbD); jbD.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { if(button == null) JOptionPane.showMessageDialog(null,"请选择加密方式！","提示",JOptionPane.OK_OPTION); else { File file = new File(fp.getFileName()); if (file.exists()&&button.getText().equals("三重DES加密算法")) decrypt_des(file.getAbsoluteFile(),pp.getKey()); else if(file.exists()&&button.getText().equals("替代加密算法")) decrypt_kaisa(file.getAbsoluteFile(),pp.getKey()); else JOptionPane.showMessageDialog(null,"请选择文件！","提示",JOptionPane.OK_OPTION); } } }); setVisible(true); } //================================================================================================================================ //3DES算法 private void encrypt_des(File fileIn,String sKey) { /* 在此添加加密函数 实现加密 */ try { if(sKey.length() == 48) { byte[] bytK1 = getKeyByStr(sKey.substring(0,16)); byte[] bytK2 = getKeyByStr(sKey.substring(16,32)); byte[] bytK3 = getKeyByStr(sKey.substring(32,48)); FileInputStream fis = new FileInputStream(fileIn); byte[] bytIn = new byte[(int)fileIn.length()]; for(int i = 0;i<fileIn.length();i++) { bytIn[i] = (byte)fis.read(); } //加密 byte[] bytOut = encryptByDES(encryptByDES( encryptByDES(bytIn,bytK1),bytK2),bytK3); String fileOut = fileIn.getPath() + ".tdes"; FileOutputStream fos = new FileOutputStream(fileOut); for(int i = 0;i<bytOut.length;i++) { fos.write((int)bytOut[i]); } fos.close(); JOptionPane.showMessageDialog(this,"加密成功！","提示",JOptionPane.OK_OPTION); } else JOptionPane.showMessageDialog(this,"密码长度必须等于48！","错误信息",JOptionPane.ERROR_MESSAGE); } catch(Exception e) { e.printStackTrace(); } } /* 在此添加解密函数 实现解密 */ /** 解密函数 输入： 要解密的文件，密码（由0-F组成，共48个字符，表示3个8位的密码）如： AD67EA2F3BE6E5ADD368DFE03120B5DF92A8FD8FEC2F0746 其中： AD67EA2F3BE6E5AD DES密码一 D368DFE03120B5DF DES密码二 92A8FD8FEC2F0746 DES密码三 输出： 对输入的文件解密后，保存到用户指定的文件中。 */ private void decrypt_des(File fileIn,String sKey) { try { if(sKey.length() == 48) { String strPath = fileIn.getPath(); if(strPath.substring(strPath.length()-5).toLowerCase().equals(".tdes")) strPath = strPath.substring(0,strPath.length()-5); else { JOptionPane.showMessageDialog(this,"不是合法的加密文件！","提示",JOptionPane.OK_OPTION); return; } JFileChooser chooser = new JFileChooser(); chooser.setCurrentDirectory(new File(".")); chooser.setSelectedFile(new File(strPath)); //用户指定要保存的文件 int ret = chooser.showSaveDialog(this); if(ret==JFileChooser.APPROVE_OPTION) { byte[] bytK1 = getKeyByStr(sKey.substring(0,16)); byte[] bytK2 = getKeyByStr(sKey.substring(16,32)); byte[] bytK3 = getKeyByStr(sKey.substring(32,48)); FileInputStream fis = new FileInputStream(fileIn); byte[] bytIn = new byte[(int)fileIn.length()]; for(int i = 0;i<fileIn.length();i++) { bytIn[i] = (byte)fis.read(); } //解密 byte[] bytOut = decryptByDES(decryptByDES( decryptByDES(bytIn,bytK3),bytK2),bytK1); File fileOut = chooser.getSelectedFile(); fileOut.createNewFile(); FileOutputStream fos = new FileOutputStream(fileOut); for(int i = 0;i<bytOut.length;i++) { fos.write((int)bytOut[i]); } fos.close(); JOptionPane.showMessageDialog(this,"解密成功！","提示",JOptionPane.OK_OPTION); } } else JOptionPane.showMessageDialog(this,"密码长度必须等于48！","错误信息",JOptionPane.ERR