package com.ltkj.web.controller.api.utils;

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

public class CryptoUtil {

    private static final String KEY = "f$9Lz#Q@1vT!eW2%"; // AES密钥（16位）
    private static final String ALGORITHM = "AES";

    // 加密
    public static String encrypt(String plainText) throws Exception {
        SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        byte[] encrypted = cipher.doFinal(plainText.getBytes());
        return Base64.getEncoder().encodeToString(encrypted);
    }

    // 解密
    public static String decrypt(String cipherText) throws Exception {
        SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, keySpec);
        byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(cipherText));
        return new String(decrypted);
    }

    public static void main(String[] args) throws Exception {
        String encrypt = encrypt("{\"card\": \"622722197210102079\",\"name\":\"焦拉民\"}");
        System.out.println("encrypt = " + encrypt);
        String decrypt = decrypt(encrypt);
        System.out.println("decrypt = " + decrypt);
    }
}