加密解密工具类

加密解密工具类

package com.example.modules.util;
 
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;  
import javax.crypto.SecretKey;  
import javax.crypto.spec.SecretKeySpec;  
import java.security.SecureRandom;  
import java.util.Base64;  
  
public class EncryptionUtil {  
  
    // DES加密解密  
    public static String desEncrypt(String data, String key) throws Exception {  
        SecretKey secretKey = generateDESKey(key);  
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);  
        byte[] encrypted = cipher.doFinal(data.getBytes());  
        return Base64.getEncoder().encodeToString(encrypted);  
    }  
  
    public static String desDecrypt(String encryptedData, String key) throws Exception {  
        SecretKey secretKey = generateDESKey(key);  
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  
        cipher.init(Cipher.DECRYPT_MODE, secretKey);  
        byte[] original = cipher.doFinal(Base64.getDecoder().decode(encryptedData));  
        return new String(original);  
    }  
  
    private static SecretKey generateDESKey(String key) throws Exception {  
        byte[] keyBytes = key.getBytes();  
        SecretKeySpec keySpec = new SecretKeySpec(keyBytes, 0, 8, "DES");  
        return keySpec;  
    }  
  
    // AES加密解密  
    public static String aesEncrypt(String data, String key) throws Exception {  
        SecretKey secretKey = generateAESKey(key);  
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);  
        byte[] encrypted = cipher.doFinal(data.getBytes());  
        return Base64.getEncoder().encodeToString(encrypted);  
    }  
  
    public static String aesDecrypt(String encryptedData, String key) throws Exception {  
        SecretKey secretKey = generateAESKey(key);  
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  
        cipher.init(Cipher.DECRYPT_MODE, secretKey);  
        byte[] original = cipher.doFinal(Base64.getDecoder().decode(encryptedData));  
        return new String(original);  
    }  
  
    private static SecretKey generateAESKey(String key) throws Exception {  
        byte[] keyBytes = key.getBytes();  
        SecretKeySpec keySpec = new SecretKeySpec(keyBytes, 0, 16, "AES");  
        return keySpec;  
    }  
  
    public static void main(String[] args) {  
        try {  
            String originalText = "Hello, World!";  
            String desKey = "12345678"; // DES key must be 8 bytes  
            String aesKey = "1234567890123456"; // AES key must be 16 bytes  
  
            String desEncrypted = desEncrypt(originalText, desKey);  
            String desDecrypted = desDecrypt(desEncrypted, desKey);  
  
            String aesEncrypted = aesEncrypt(originalText, aesKey);  
            String aesDecrypted = aesDecrypt(aesEncrypted, aesKey);  
  
            System.out.println("DES Original: " + originalText);  
            System.out.println("DES Encrypted: " + desEncrypted);  
            System.out.println("DES Decrypted: " + desDecrypted);  
  
            System.out.println("AES Original: " + originalText);  
            System.out.println("AES Encrypted: " + aesEncrypted);  
            System.out.println("AES Decrypted: " + aesDecrypted);  
  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
}