jiemi.java

应用公钥加密体制的代表算法RSA 应用对称加密算法DES 应用散列算法MD5计算消息摘要 数字签名并验证

                .addComponent(jButton10)
                .addContainerGap())
        );
        pack();
    }// </editor-fold>                        

    private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       try{
            String filename1=jTextField3.getText();
            FileInputStream f = new FileInputStream(filename1);
            ObjectInputStream b = new ObjectInputStream(f);
            RSAPrivateKey prk = (RSAPrivateKey)b.readObject();
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.UNWRAP_MODE, prk);
            String filename2=jTextField1.getText();
            FileInputStream enc = new FileInputStream(filename2);
            ObjectInputStream b1 = new ObjectInputStream(enc);
            byte[] wrapedkey = (byte[]) b1.readObject();
            Key key = cipher.unwrap(wrapedkey, "DESede", Cipher.SECRET_KEY);
            FileOutputStream fos2=new FileOutputStream("DES密钥.dat");
            ObjectOutputStream b2=new ObjectOutputStream(fos2);
            b2.writeObject(key);
            fos2.close();
            b2.close();
       }catch(Exception e){JOptionPane.showMessageDialog(new Frame(),"error!!");}
       JOptionPane.showMessageDialog(new Frame(),"被加密的密钥已解密!!");
    }                                        

    private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) {                                          

      try{   
          FileInputStream fis1=new FileInputStream("签名.txt");
         int num1=fis1.available();
         byte[] buf1=new byte[num1];
         fis1.read(buf1);
         
         FileInputStream fis2=new FileInputStream("摘要.dat");
         int num2=fis2.available();
         byte[] buf2=new byte[num2];
         fis2.read(buf2);
         
         String filename=jTextField5.getText();
         FileInputStream fis3=new FileInputStream(filename);
         ObjectInputStream ois=new ObjectInputStream(fis3);
         RSAPublicKey pbk=(RSAPublicKey)ois.readObject();
         
         Signature s=Signature.getInstance("MD5withRSA");
         s.initVerify(pbk);
         s.update(buf2);
         boolean f=s.verify(buf1);
         if(f){
             JOptionPane.showMessageDialog(new Frame(),"数字签名验证成功!!");
         }
         else{
             JOptionPane.showMessageDialog(new Frame(),"数字签名验证失败!!");
         }
         
    }  catch(Exception e){System.out.println("error");{}
    }
    }                                         

    private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Frame f=new Frame();
        f.setLocation(300,300);
        f.setSize(600,400);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosed(WindowEvent e){
                System.exit(0);
            }
        });
        FileDialog fd=new FileDialog(f,"输入对方公钥",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile=fd.getDirectory()+fd.getFile();
       jTextField5.setText(strfile);
    }                                        

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
     try{
         FileInputStream fis=new FileInputStream("消息.txt");
         int num=fis.available();
         byte[] b=new byte[num];
        fis.read(b);
         MessageDigest m=MessageDigest.getInstance("MD5");
         m.update(b);
         byte ds[]=m.digest();
       
         String result="";
        for(int i=0;i<ds.length;i++){
        
                result+=Integer.toHexString((0x000000ff & ds[i]) | 0xffffff00).substring(6);

        }
        //System.out.println(result);
         FileOutputStream fos=new FileOutputStream("摘要.dat");
        byte[] buf1=result.getBytes();
         fos.write(buf1);
         fos.close();
         fis.close();
       
     }catch(Exception e){System.out.println("error");}
     JOptionPane.showMessageDialog(new Frame(),"消息摘要已计算并输出!!");
     
    }                                        

    private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    try{
        String filename1=jTextField4.getText();
        FileInputStream fis1=new FileInputStream(filename1);
         ObjectInputStream ob=new ObjectInputStream(fis1);
         Key skey=(Key)ob.readObject();
         Cipher cp=Cipher.getInstance("DESede");
         cp.init(Cipher.DECRYPT_MODE,skey);
         String filename2=jTextField2.getText();
          FileInputStream fis=new FileInputStream(filename2);
      
         FileOutputStream fos=new FileOutputStream("签名.txt");
         CipherOutputStream cos=new CipherOutputStream(fos,cp);
         int s=0;
         for(int i=0;i<128+10;i++){
             cos.write(fis.read());
         }
         fos = new FileOutputStream("消息.txt");
         cos = new CipherOutputStream(fos,cp);
         while((s=fis.read())!=-1){
             cos.write(s);
             
         }
         
         cos.close();
         fos.close();
         fis.close();
        
       
       
    }catch(Exception e){JOptionPane.showMessageDialog(new Frame(),"error!!");}
    JOptionPane.showMessageDialog(new Frame(),"文件已解密!!");
    }                                        

    private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Frame f=new Frame();
        f.setLocation(300,300);
        f.setSize(600,400);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosed(WindowEvent e){
                System.exit(0);
            }
        });
        FileDialog fd=new FileDialog(f,"输入密钥",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile4=fd.getDirectory()+fd.getFile();
       jTextField4.setText(strfile4);
    }                                        

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Frame f=new Frame();
        f.setLocation(300,300);
        f.setSize(600,400);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosed(WindowEvent e){
                System.exit(0);
            }
        });
        FileDialog fd=new FileDialog(f,"输入解密文件",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile3=fd.getDirectory()+fd.getFile();
       jTextField2.setText(strfile3);
    }                                        

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                         
      Frame f=new Frame();
        f.setLocation(300,300);
        f.setSize(600,400);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosed(WindowEvent e){
                System.exit(0);
            }
        });
        FileDialog fd=new FileDialog(f,"输入密钥",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile2=fd.getDirectory()+fd.getFile(); 
       jTextField3.setText(strfile2);
    }                                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Frame f=new Frame();
        f.setLocation(300,300);
        f.setSize(600,400);
        f.addWindowListener(new WindowAdapter(){
            public void windowClosed(WindowEvent e){
                System.exit(0);
            }
        });
        FileDialog fd=new FileDialog(f,"输入解密文件",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile1=fd.getDirectory()+fd.getFile();
       jTextField1.setText(strfile1);
    }                                        
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) throws Exception{
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new jiemi().setVisible(true);
            }
        });
       
         mythread m=new mythread();
         mythread1 m1=new mythread1();
    
         m.start();
         m1.start();
        
       
    }
      
    
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton10;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JButton jButton5;
    private javax.swing.JButton jButton6;
    private javax.swing.JButton jButton7;
    private javax.swing.JButton jButton9;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JLabel jLabel8;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    private javax.swing.JTextField jTextField5;
    // End of variables declaration                   
    
}