girl_gui.java

这是一个文本加密、解密系统

        //build the authentication mode panel
        this.authen_panel = new JPanel();
        this.authen_panel.setLayout(null);
        
        this.authen_file_label = new JLabel("目标文件路径：");
        this.authen_file_label.setBounds(20, 200, 100, 30);
        this.authen_panel.add(this.authen_file_label);
        
        this.authen_file_choose_field = new JTextField();
        this.authen_file_choose_field.setBounds(120, 200, 350, 30);
        this.authen_panel.add(this.authen_file_choose_field);
        
        this.authen_file_choose_button = new JButton(" 浏览 ");
        this.authen_file_choose_button.setBounds(490, 200, 80, 30);
        this.authen_panel.add(this.authen_file_choose_button);
        
        this.sign_button = new JButton("生成MAC");
        this.sign_button.setBounds(140, 280, 100, 35);
        this.authen_panel.add(this.sign_button);
        
        this.verify_button = new JButton("报文认证");
        this.verify_button.setBounds(360, 280, 100, 35);
        this.authen_panel.add(this.verify_button);
        
        this.authen_file_choose_button.addActionListener(buttonHandler);
        this.sign_button.addActionListener(buttonHandler);
        this.verify_button.addActionListener(buttonHandler);
        
        this.authen_specify_area = new JTextArea(12, 38);
        Color authen_area_color = new Color(217, 217, 243);
        this.authen_specify_area.setBackground(authen_area_color);
        this.authen_specify_area.setEditable(false);
        this.authen_specify_area.setSelectedTextColor(Color.RED);
        this.authen_specify_area.setText("                                                             " +
                                        " MAC生成&认证说明\n" + 
                                        "                                                  " + 
                                        "~~~~~~~~~~~~~~~~~~~~~~~~~~\n" +
                                        " (1)该消息认证模型使用的是Java内置的HmacMD5算法。\n\n" + 
                                        " (2)若要对一份报文进行MAC签名或者认证，请首先选择一个目标文件。\n\n" +
                                        " (3)为了安全起见，该程序开发者强烈建议您先进行MAC签名，再作加密处理。");
        this.authen_speicfy_scroll = new JScrollPane(this.authen_specify_area);
        this.authen_speicfy_scroll.setBounds(55, 370, 480, 260);
        this.authen_panel.add(this.authen_speicfy_scroll);
        
        this.deck.add(this.encryp_panel, this.encryption_item.getText());
        this.deck.add(this.authen_panel, this.authentication_item.getText());
        add(this.deck);
        
        pack();
        setSize(600,730);
        setLocation(650, 30);
        setResizable(false);
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    
    //judges the validity of the encryption/decryption input src file
    private boolean judge_encryp_input()
    {
        String a = this.encryp_file_choose_field.getText();
        File file = new File(a);
        
        if (a.equals(""))
        {
            JOptionPane.showMessageDialog(null," 请选择一个需要进行加密/解密的文件 ! ","选择文件",JOptionPane.INFORMATION_MESSAGE);
            this.encryp_file_choose_field.setText("");
            return false;
        }
        else if (!file.exists())
        {
            JOptionPane.showMessageDialog(null," 文件路径出错 ! 请重新选择 .","找不到文件",JOptionPane.ERROR_MESSAGE);
            this.encryp_file_choose_field.setText("");
            return false;
        }
        else
        {
            return true;
        }
    }
    
    //judges the basic validity of the authentication input src file
    private boolean judge_authen_input()
    {
        String a = this.authen_file_choose_field.getText();
        File file = new File(a);
        
        if (a.equals(""))
        {
            JOptionPane.showMessageDialog(null," 请选择一个需要进行MAC签名/认证的文件 ! ","选择文件",JOptionPane.INFORMATION_MESSAGE);
            this.authen_file_choose_field.setText("");
            return false;
        }
        else if (!file.exists())
        {
            JOptionPane.showMessageDialog(null," 文件路径出错 ! 请重新选择 .","找不到文件",JOptionPane.ERROR_MESSAGE);
            this.authen_file_choose_field.setText("");
            return false;
        }
        else
        {
            return true;
        }
    }
    
    //gets the encryption/decryption input src file object from the file choose field
    private File get_encryp_input_file()
    {
        String a = this.encryp_file_choose_field.getText();
        File input_file = new File(a);
        
        return input_file;
    }
    
    //gets the authentication input src file object from the file choose field
    private File get_authen_input_file()
    {
        String a = this.authen_file_choose_field.getText();
        File input_file = new File(a);
        
        return input_file;
    }
    
    ActionListener encryp_mode_handler =
        new ActionListener() {
            public void actionPerformed(ActionEvent e) 
            {
                show_the_panel(((JMenuItem)e.getSource()).getText());
            }
    };
    
    ActionListener authen_mode_handler =
        new ActionListener() {
            public void actionPerformed(ActionEvent e) 
            {
                show_the_panel(((JMenuItem)e.getSource()).getText());
            }
    };
    
    private class RadioButtonHandler implements ItemListener
    {
        public void itemStateChanged(ItemEvent event)
        {
            if (event.getSource() == symmetric_button)
            {
                cipher_combobox.removeAllItems();     
                cipher_combobox.addItem(cipher_name[0]);
                cipher_combobox.addItem(cipher_name[1]);
                
                encryp_mode = GUI_interface.SYMMETRIC_CIPHER;
                selected_key_algorithm_name = key_algorithm_name[0];
                selected_algorithm_name = algorithm_name[0];
            }
            else if (event.getSource() == asymmetric_button)
            {
                cipher_combobox.removeAllItems();
                cipher_combobox.addItem(cipher_name[2]);
                
                encryp_mode = GUI_interface.ASYMMETRIC_CIPHER;
                selected_key_algorithm_name = key_algorithm_name[2];
                selected_algorithm_name = algorithm_name[2];
            }
        }
    }
    
    private class ComboBoxItemHandler implements ItemListener
    {
        public void itemStateChanged(ItemEvent event)
        {
            if (cipher_combobox.getSelectedItem() == cipher_combobox.getItemAt(0))
            {
                encryp_mode = GUI_interface.SYMMETRIC_CIPHER;
                selected_key_algorithm_name = key_algorithm_name[0];
                selected_algorithm_name = algorithm_name[0];
            }
            else if (cipher_combobox.getSelectedItem() == cipher_combobox.getItemAt(1))
            {
                encryp_mode = GUI_interface.SYMMETRIC_CIPHER;
                selected_key_algorithm_name = key_algorithm_name[1];
                selected_algorithm_name = algorithm_name[1];
            }
            else if (cipher_combobox.getSelectedItem() == cipher_combobox.getItemAt(2))
            {
                encryp_mode = GUI_interface.ASYMMETRIC_CIPHER;
                selected_key_algorithm_name = key_algorithm_name[2];
                selected_algorithm_name = algorithm_name[2];
            }
        }
    }
    
    private class ButtonEventHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent event) 
        {
            if (event.getSource() == encryp_file_choose_button)
            {
                File encryp_src_file = select_file();
                if (encryp_src_file == null)
                {
                    return;
                }
                String fileDir = encryp_src_file.getAbsolutePath();
                encryp_file_choose_field.setText(fileDir);
            }
            else if (event.getSource() == authen_file_choose_button)
            {
                File authen_src_file = select_file();
                if (authen_src_file == null)
                {
                    return;
                }
                String fileDir = authen_src_file.getAbsolutePath();
                authen_file_choose_field.setText(fileDir);
            }
            else if (event.getSource() == encryp_button)
            {
                if (judge_encryp_input())
                {
                    if (encryp_mode != GUI_interface.MODE_NOT_SET)
                    {
                        File encryp_src_file = get_encryp_input_file();
                        File encryp_dst_file = select_dst_file();
                        if (encryp_dst_file == null)
                        {
                            return;
                        }
                        do_encryp(encryp_src_file, encryp_dst_file);
                    }
                    else
                    {
                        JOptionPane.showMessageDialog(null," 尚未选择加密模式 ! 请选择一种加密算法 .","加密/解密算法",JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                }
            }
            else if (event.getSource() == decryp_button)
            {
                if (judge_encryp_input())
                {
                    if (encryp_mode != GUI_interface.MODE_NOT_SET)
                    {
                        File decryp_src_file = get_encryp_input_file();
                        File decryp_dst_file = select_dst_file();
                        if (decryp_dst_file == null)
                        {
                            return;
                        }
                        do_decryp(decryp_src_file, decryp_dst_file);
                    }
                    else
                    {
                        JOptionPane.showMessageDialog(null," 尚未选择解密模式 ! 请选择一种解密算法 .","加密/解密算法",JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                }
            }