java写的aes加密解密

左手的ㄟ右手 2022-05-30 12:39 240阅读 0赞

# java写的aes加密解密函数  #

![70][]

选择文件：

![70 1][]

选择加密后的文件解密

附源代码

import java.awt.EventQueue;  
  
  
import javax.crypto.Cipher;  
import javax.crypto.SecretKey;  
import javax.crypto.SecretKeyFactory;  
import javax.crypto.spec.IvParameterSpec;  
import javax.crypto.spec.PBEKeySpec;  
import javax.crypto.spec.SecretKeySpec;  
import javax.swing.JFrame;  
  
  
import java.awt.Font;  
  
  
import org.eclipse.wb.swing.FocusTraversalOnArray;  
  
  
import java.awt.Component;  
  
  
import javax.swing.GroupLayout;  
import javax.swing.GroupLayout.Alignment;  
import javax.swing.JLabel;  
  
  
import java.awt.Color;  
import java.awt.event.ActionEvent;  
import java.awt.event.ActionListener;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.security.AlgorithmParameters;  
import java.security.SecureRandom;  
import java.security.spec.KeySpec;  
  
  
import javax.swing.LayoutStyle.ComponentPlacement;  
import javax.swing.JButton;  
import javax.swing.JFileChooser;  
import javax.swing.JTextField;  
  
  
import java.security.AlgorithmParameters;  
import java.security.SecureRandom;  
import java.security.spec.KeySpec;  
  
  
import javax.crypto.Cipher;  
import javax.crypto.SecretKey;  
import javax.crypto.SecretKeyFactory;  
import javax.crypto.spec.IvParameterSpec;  
import javax.crypto.spec.PBEKeySpec;  
import javax.crypto.spec.SecretKeySpec;  
  
  
  
  
public class AES \{  
  
  
private JFrame frmaes;  
private JTextField textField;  
public static JTextField textField\_1;  
public static File file;  
public static String password;  
  
  
/\*\*  
 \* Launch the application.  
 \*/  
public static void main(String\[\] args) \{  
EventQueue.invokeLater(new Runnable() \{  
public void run() \{  
try \{  
AES window = new AES();  
window.frmaes.setVisible(true);  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
\}  
\});  
\}  
  
  
/\*\*  
 \* Create the application.  
 \*/  
public AES() \{  
initialize();  
\}  
  
  
/\*\*  
 \* Initialize the contents of the frame.  
 \*/  
public static void encryptFile(File file) throws Exception  
    \{  
          
        FileInputStream inp = new FileInputStream(file);  
          
        FileOutputStream out = new FileOutputStream(file+"-Encrypted") ;  
          
        System.out.println("Encrypting file: "+file);  
        password=textField\_1.getText();  
  
  
          
        //password , iv , salt should be transfered to other end in secure manner  
        //salt is used for encoding.  
        //salt should be transferred to the recipient securely for decryption  
        byte\[\] salt = new byte\[8\] ;  
          
        SecureRandom secureRandom = new SecureRandom();  
        secureRandom.nextBytes(salt);  
          
        FileOutputStream saltOut = new FileOutputStream("salt.enc") ;  
          
        saltOut.write(salt);  
        saltOut.close();  
          
        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");  
          
        KeySpec keySpec = new PBEKeySpec(password.toCharArray() , salt , 65536 , 256 ) ;  
          
        SecretKey secretKey = factory.generateSecret(keySpec) ;  
        SecretKey secret = new SecretKeySpec(secretKey.getEncoded(), "AES") ;  
          
          
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding") ;  
        cipher.init(Cipher.ENCRYPT\_MODE, secret);  
          
        AlgorithmParameters algoParams = cipher.getParameters() ;  
          
        //iv adds randomness to text and just makes more secure  
        //used while initialising cipher  
        FileOutputStream ivOut = new FileOutputStream("iv.enc");  
        byte\[\] iv = algoParams.getParameterSpec(IvParameterSpec.class).getIV() ;  
          
        ivOut.write(iv);  
        ivOut.close();  
          
          
         ///      File Encryption.  
           
           
         byte\[\] input = new byte\[64\] ;  
         int bytesRead ;  
           
         while( (bytesRead = inp.read(input)) != -1 )  
         \{  
             byte\[\] output = cipher.update(input,0,bytesRead) ;  
               
             if( output != null )  
             \{  
                 out.write(output);  
             \}  
         \}  
           
         byte\[\] output = cipher.doFinal() ;  
           
         if( output != null )  
         \{  
             out.write(output);  
         \}  
           
         inp.close();  
         out.flush();  
         out.close();  
          
         System.out.println("File "+file+" Successfully Encrypted.");  
           
           
           
    \}  
      
      
    public static void decryptFile(File file , String password ) throws Exception  
    \{  
        FileInputStream inp = new FileInputStream(file) ;  
          
        FileOutputStream out = new FileOutputStream(file+"--Decrypted") ;  
          
        System.out.println("Decrypting file : "+file);  
          
        //reading salt file  
        FileInputStream saltIn = new FileInputStream("salt.enc");  
        byte\[\] salt = new byte\[8\] ;  
          
        saltIn.read(salt) ;  
        saltIn.close();  
          
        //reading iv file  
        FileInputStream ivIn = new FileInputStream("iv.enc");  
        byte\[\] iv = new byte\[16\];  
          
        ivIn.read(iv);  
        ivIn.close();  
          
          
        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1") ;  
          
        KeySpec keySpec = new PBEKeySpec(password.toCharArray() , salt , 65536 , 256);  
          
        SecretKey secretKey = factory.generateSecret(keySpec) ;  
          
        SecretKey secret = new SecretKeySpec(secretKey.getEncoded() , "AES") ;  
          
          
        /   File decryption.  
          
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding") ;  
        cipher.init(Cipher.DECRYPT\_MODE, secret , new IvParameterSpec(iv) );  
          
        byte\[\] in = new byte\[64\] ;  
        int read ;  
          
        while( (read = inp.read(in)) != -1 )  
        \{  
            byte\[\] output = cipher.update(in ,0 , read);  
              
            if( output != null )  
            \{  
                out.write(output);  
            \}  
        \}  
          
        byte\[\] output = cipher.doFinal() ;  
          
        if( output != null )  
        \{  
            out.write(output);  
        \}  
          
        inp.close();  
        out.flush();  
        out.close();  
          
        System.out.println("File : "+ file +" successfully Decrypted");  
    \}  
  
  
private void initialize() \{  
frmaes = new JFrame();  
frmaes.getContentPane().setFont(new Font("隶书", Font.PLAIN, 20));  
frmaes.getContentPane().setBackground(new Color(127, 255, 212));  
frmaes.setFont(new Font("隶书", Font.PLAIN, 30));  
frmaes.setTitle("AES\\u52A0\\u5BC6");  
frmaes.setBounds(100, 100, 450, 324);  
frmaes.setDefaultCloseOperation(JFrame.EXIT\_ON\_CLOSE);  
  
JLabel lblaes = new JLabel("AES\\u52A0\\u5BC6");  
lblaes.setFont(new Font("隶书", Font.PLAIN, 30));  
  
JLabel label = new JLabel("\\u8BF7\\u9009\\u62E9\\u4E00\\u4E2A\\u6587\\u4EF6\\uFF1A");  
label.setFont(new Font("隶书", Font.PLAIN, 20));  
  
JButton button = new JButton("\\u9009\\u62E9\\u6587\\u4EF6");  
button.setFont(new Font("隶书", Font.PLAIN, 20));  
  
  
JLabel label\_1 = new JLabel("\\u83B7\\u53D6\\u7684\\u6587\\u4EF6\\u8DEF\\u5F84\\u4E3A\\uFF1A");  
label\_1.setFont(new Font("隶书", Font.PLAIN, 20));  
  
textField = new JTextField();  
textField.setFont(new Font("隶书", Font.PLAIN, 20));  
textField.setColumns(10);  
  
JLabel label\_2 = new JLabel("\\u8BF7\\u8F93\\u5165\\u79D8\\u94A5\\uFF1A");  
label\_2.setFont(new Font("隶书", Font.PLAIN, 20));  
  
textField\_1 = new JTextField();  
textField\_1.setFont(new Font("隶书", Font.PLAIN, 20));  
textField\_1.setColumns(10);  
  
JLabel label\_3 = new JLabel("\\u70B9\\u51FB\\u52A0\\u5BC6\\uFF1A");  
label\_3.setFont(new Font("隶书", Font.PLAIN, 20));  
  
JButton button\_1 = new JButton("\\u52A0\\u5BC6\\u6587\\u4EF6");  
button\_1.setFont(new Font("隶书", Font.PLAIN, 20));  
  
JLabel label\_4 = new JLabel("\\u70B9\\u51FB\\u52A0\\u5BC6\\uFF1A");  
label\_4.setFont(new Font("隶书", Font.PLAIN, 20));  
  
JButton button\_2 = new JButton("\\u89E3\\u5BC6\\u6587\\u4EF6");  
button\_2.setFont(new Font("隶书", Font.PLAIN, 20));  
  
button.addActionListener(new ActionListener() \{  
public void actionPerformed(ActionEvent e) \{  
JFileChooser filechooser = new JFileChooser();  
int returnValue = filechooser.showOpenDialog(filechooser);  
\{  
  
if(returnValue == JFileChooser.APPROVE\_OPTION)  
\{  
file=filechooser.getSelectedFile();  
  
try \{  
String path=file.getCanonicalPath();  
textField.setText(path);  
\} catch (IOException e1) \{  
// TODO 自动生成的 catch 块  
e1.printStackTrace();  
\}  
\}  
\}  
\}  
  
\});  
  
button\_1.addActionListener(new ActionListener() \{  
public void actionPerformed(ActionEvent e) \{  
try \{  
encryptFile(file) ;  
\} catch (Exception e1) \{  
// TODO 自动生成的 catch 块  
e1.printStackTrace();  
\}  
\}  
  
\});  
button\_2.addActionListener(new ActionListener() \{  
public void actionPerformed(ActionEvent e) \{  
try \{  
decryptFile(file , password ) ;  
\} catch (Exception e1) \{  
// TODO 自动生成的 catch 块  
e1.printStackTrace();  
\}  
\}  
  
\});  
   
  
GroupLayout groupLayout = new GroupLayout(frmaes.getContentPane());  
groupLayout.setHorizontalGroup(  
groupLayout.createParallelGroup(Alignment.LEADING)  
.addGroup(groupLayout.createSequentialGroup()  
.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(label)  
.addPreferredGap(ComponentPlacement.RELATED)  
.addComponent(button))  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(label\_1)  
.addPreferredGap(ComponentPlacement.RELATED)  
.addComponent(textField, GroupLayout.PREFERRED\_SIZE, 174, GroupLayout.PREFERRED\_SIZE))  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(label\_2)  
.addPreferredGap(ComponentPlacement.RELATED)  
.addComponent(textField\_1, GroupLayout.PREFERRED\_SIZE, 114, GroupLayout.PREFERRED\_SIZE))  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(label\_3)  
.addPreferredGap(ComponentPlacement.RELATED)  
.addComponent(button\_1))  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(label\_4)  
.addPreferredGap(ComponentPlacement.RELATED)  
.addComponent(button\_2))  
.addGroup(groupLayout.createSequentialGroup()  
.addGap(155)  
.addComponent(lblaes)))  
.addContainerGap(58, Short.MAX\_VALUE))  
);  
groupLayout.setVerticalGroup(  
groupLayout.createParallelGroup(Alignment.LEADING)  
.addGroup(groupLayout.createSequentialGroup()  
.addContainerGap()  
.addComponent(lblaes)  
.addPreferredGap(ComponentPlacement.UNRELATED)  
.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)  
.addComponent(label)  
.addComponent(button))  
.addPreferredGap(ComponentPlacement.RELATED)  
.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)  
.addComponent(label\_1)  
.addComponent(textField, GroupLayout.PREFERRED\_SIZE, GroupLayout.DEFAULT\_SIZE, GroupLayout.PREFERRED\_SIZE))  
.addPreferredGap(ComponentPlacement.UNRELATED)  
.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)  
.addComponent(label\_2)  
.addComponent(textField\_1, GroupLayout.PREFERRED\_SIZE, GroupLayout.DEFAULT\_SIZE, GroupLayout.PREFERRED\_SIZE))  
.addPreferredGap(ComponentPlacement.UNRELATED)  
.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)  
.addComponent(label\_3)  
.addComponent(button\_1))  
.addPreferredGap(ComponentPlacement.RELATED)  
.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)  
.addComponent(label\_4)  
.addComponent(button\_2))  
.addContainerGap(17, Short.MAX\_VALUE))  
);  
frmaes.getContentPane().setLayout(groupLayout);  
frmaes.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component\[\]\{frmaes.getContentPane()\}));  
\}  
\}

[70]: /images/20220530/5f9cae2e9c0b49e3ae3d134f7edc3a00.png
[70 1]: /images/20220530/bc28fefd2fc34fb6b2e98078a8628ded.png