jiami.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

             System.out.println(e);
         }
    }                                        

    private void jmi8ActionPerformed(java.awt.event.ActionEvent evt) {                                     
           try{
               Cipher cipher = Cipher.getInstance("RSA");
               cipher.init(Cipher.WRAP_MODE, pubk);  
               byte[] wrapedkey = cipher.wrap(sk);
               OutputStream fos = new FileOutputStream("RSA加密.dat"); 
               ObjectOutputStream b2=new ObjectOutputStream(fos);
               b2.writeObject(wrapedkey);
               b2.close();
               fos.close();
           }catch(Exception e){System.out.println("error");}
           jTextArea2.append("\n   DES密钥已加密!");
    }                                    

    private void jmi7ActionPerformed(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,"输入要加密的密钥",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile=fd.getDirectory()+fd.getFile();
      try{
       FileInputStream fis=new FileInputStream(strfile);
       ObjectInputStream ob=new ObjectInputStream(fis);
       sk=(SecretKey)ob.readObject();
       
      }catch(Exception e){}
        jTextArea2.append("\n   要加密的密钥已输入.......");
    }                                    

    private void jmi6ActionPerformed(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();
      try{
       FileInputStream fis=new FileInputStream(strfile);
       ObjectInputStream ob=new ObjectInputStream(fis);
       pubk=(RSAPublicKey)ob.readObject();
       
      }catch(Exception e){}
        jTextArea2.append("\n   对方公钥已输入.......");
    }                                    

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
       jTextArea1.setText("");
    }                                          

    private void jMenuItem1ActionPerformed(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,"打开消息文件",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile=fd.getDirectory()+fd.getFile();
     if(strfile!=null){
       try{
       FileInputStream fis=new FileInputStream(strfile);
       int num=fis.available();
       byte[] data=new byte[num];
       fis.read(data);
       jTextArea1.append(new String(data,0,num));
      }catch(Exception e){}
     }
       jTextArea2.append("\n   消息文件已打开.......");
    }                                          

    private void jmi5ActionPerformed(java.awt.event.ActionEvent evt) {                                     
     try{ 
         
     
         FileInputStream fis1=new FileInputStream("对称加密密钥.dat");
         ObjectInputStream ob=new ObjectInputStream(fis1);
         Key skey=(Key)ob.readObject();
         Cipher cp=Cipher.getInstance("DESede");
         cp.init(Cipher.ENCRYPT_MODE,skey);
         
         FileInputStream fis2=new FileInputStream("数字签名.dat");
         
         FileOutputStream fos1=new FileOutputStream("Message.txt");
         CipherOutputStream cos=new CipherOutputStream(fos1,cp);
         
         int z=0;
         while((z=fis2.read())!=-1){
             cos.write(z);
         }
       fis2=new FileInputStream("text.dat");
        while((z=fis2.read())!=-1){
            cos.write(z);
         }
           
           
           cos.close();
           fos1.close();
           
          // fis3.close();
           fis1.close();
           fis2.close();
          
           
           
     }catch(Exception e){System.out.println("error");}
     jTextArea2.append("\n   消息已加密并输出.......");
    }                                    

    private void jmi32ActionPerformed(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,"输入消息摘要",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile=fd.getDirectory()+fd.getFile();
      try{
       FileInputStream fis=new FileInputStream(strfile);
       int num=fis.available();
       b=new byte[num];
       fis.read(b);
      }catch(Exception e){}
        jTextArea2.append("\n   消息摘要已输入.......");
    }                                     

    private void jmi33ActionPerformed(java.awt.event.ActionEvent evt) {                                      
       
        
        
      try{
        Signature sig=Signature.getInstance("MD5WithRSA");
        sig.initSign(k);
        sig.update(b);
        byte[] signedmsg=sig.sign();
        FileOutputStream fos=new FileOutputStream("数字签名.dat");
        fos.write(signedmsg);
      // for(int i=0;i<b.length;i++){
         //   System.out.println(signedmsg[i]+",");
     //  }
      }catch(Exception e){}
       jTextArea2.append("\n   消息摘要已完成数字签名并输出.......");          
    }                                     

    private void jmi31ActionPerformed(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,"输入私钥",FileDialog.LOAD);
       fd.setVisible(true);
       String strfile=fd.getDirectory()+fd.getFile();
      try{
       FileInputStream fis=new FileInputStream(strfile);
       ObjectInputStream ob=new ObjectInputStream(fis);
       k=(RSAPrivateKey)ob.readObject();
       
      }catch(Exception e){}
        jTextArea2.append("\n   私钥已输入.......");
    }                                     

    private void jmi2ActionPerformed(java.awt.event.ActionEvent evt) {                                     
      
     try{ 
          FileOutputStream fos=new FileOutputStream("text.dat");
          String s=jTextArea1.getText();
          byte[] msg=s.getBytes();
          fos.write(msg);
          fos.close();
        
         FileInputStream fis=new FileInputStream("text.dat");
         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 fos1=new FileOutputStream("消息摘要.dat");
        byte[] buf=result.getBytes();
         fos1.write(buf);
         fos.close();
         fis.close();
       
       jTextField1.setText(result);
    }catch(Exception e){System.out.println("error");}
      jTextArea2.append("\n   消息摘要已计算并输出.......");
    }                                    

    private void jmi4ActionPerformed(java.awt.event.ActionEvent evt) {                                     
         
        try{
		KeyGenerator kg=KeyGenerator.getInstance("DESede");
		kg.init(168);
		SecretKey k=kg.generateKey();
		FileOutputStream fs=new FileOutputStream("对称加密密钥.dat");
		ObjectOutputStream b=new ObjectOutputStream(fs);
		b.writeObject(k);
        }catch(Exception e){}
     jTextArea2.append("\n   对称加密密钥已生成并输出.......")   ;
    }                                    

    private void jmi1ActionPerformed(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,"保存文件",FileDialog.SAVE);
       fd.setVisible(true);
       filename=fd.getDirectory()+fd.getFile();
      try{
          FileOutputStream fos=new FileOutputStream(filename);
          String s=jTextArea1.getText();
          byte[] msg=s.getBytes();
          fos.write(msg);
      }catch(Exception e){System.out.println("IOException!!");}
      jTextArea2.append("\n   消息已保存.......");
    }                                    
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new jiami().setVisible(true);
            }
        });
    }
    private byte[] b;
    private RSAPublicKey pubk;
    private RSAPrivateKey k; 
    private SecretKey sk;
    private String filename;
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenu jMenu3;
    private javax.swing.JMenu jMenu4;
    private javax.swing.JMenu jMenu5;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextArea jTextArea2;
    private javax.swing.JTextField jTextField1;
    public static final javax.swing.JTextField jTextField3 = new javax.swing.JTextField();
    private javax.swing.JMenuItem jmi1;
    private javax.swing.JMenuItem jmi2;
    private javax.swing.JMenuItem jmi31;
    private javax.swing.JMenuItem jmi32;
    private javax.swing.JMenuItem jmi33;
    private javax.swing.JMenuItem jmi4;
    private javax.swing.JMenuItem jmi5;
    private javax.swing.JMenuItem jmi6;
    private javax.swing.JMenuItem jmi7;
    private javax.swing.JMenuItem jmi8;
    // End of variables declaration                   
    
}