package com.vci.ubcs.starter.util;

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

/**
 * @author ludc
 * @date 2023/9/20 11:08
 */
public class AESUtils {

	/**
	 * aes加密
	 * @param content 待加密数据
	 * @param key 密钥
	 * @return
	 * @throws Exception
	 */
	public static String aesEncrypt(String content, String key) throws Exception {
		//指定加密算法
		Cipher cipher = Cipher.getInstance("AES");
		//创建加密规则：指定key和加密类型
		SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES");
		//指定加密模式为加密，指定加密规则
		cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
		//调用加密方法
		byte[] result = cipher.doFinal(content.getBytes());
		//用Base64编码
		return new String(Base64.getEncoder().encode(result));
	}

	/**
	 * aes解密
	 * @param content 待解密数据
	 * @param key 密钥
	 * @return
	 * @throws Exception
	 */
	public static String aesDecrypt(String content, String key) throws Exception {
		//Base64解码
		byte[] result = Base64.getDecoder().decode(content);
		//指定加密算法
		Cipher cipher = Cipher.getInstance("AES");
		//创建加密规则：指定key和加密类型
		SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES");
		//指定加密模式为解密，指定加密规则
		cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
		return new String(cipher.doFinal(result));
	}

}