package com.dy.common.util;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

/**
 * @author ZhuBaoMin
 * @date 2024-10-23 14:32
 * @LastEditTime 2024-10-23 14:32
 * @Description AES对称加密解密
 */
public class AES {
    private static final String ALGORITHM = "AES";
    private static final String TRANSFORMATION = "AES";

    // 16-byte secret key
    private static final String SECRET_KEY = "YanJiuYuanSecret";

    public static String encrypt(String input) throws Exception {
        SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);

        byte[] encryptedBytes = cipher.doFinal(input.getBytes());
        return Base64.getEncoder().encodeToString(encryptedBytes);
    }

    public static String decrypt(String input) throws Exception {
        SecretKeySpec keySpec = new SecretKeySpec(SECRET_KEY.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.DECRYPT_MODE, keySpec);

        byte[] decodedBytes = Base64.getDecoder().decode(input);
        byte[] decryptedBytes = cipher.doFinal(decodedBytes);
        return new String(decryptedBytes);
    }
}