package com.fzzy.api.utils;
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import javax.crypto.Cipher;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.SecretKeySpec;
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import java.util.Base64;
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/**
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* @ClassName: AESUtils
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* @Description: AES 对称算法加密/解密工具类
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* @author zhupig3028
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* @date 2022年5月10日
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*/
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public class AESUtils {
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/**
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* 加解密统一编码方式
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*/
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private final static String ENCODING = "utf-8";
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/**
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* 加解密方式
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*/
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private final static String ALGORITHM = "AES";
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/**
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*加密模式及填充方式
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*/
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private final static String PATTERN = "AES/ECB/pkcs5padding";
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/**
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* AES加密
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* @param plainText
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* @param key
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* @return
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* @throws Exception
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*/
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public static String encrypt(String plainText, String key) throws Exception {
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if (key == null) {
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System.out.print("Key为空null");
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return null;
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}
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// 判断Key是否为16位
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// if (key.length() != 16) {
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// System.out.print("Key长度不是16位");
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// return null;
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// }
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SecretKey secretKey = new SecretKeySpec(key.getBytes(ENCODING), ALGORITHM);
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// AES加密采用pkcs5padding填充
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Cipher cipher = Cipher.getInstance(PATTERN);
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//用密匙初始化Cipher对象
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cipher.init(Cipher.ENCRYPT_MODE, secretKey);
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//执行加密操作
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byte[] encryptData = cipher.doFinal(plainText.getBytes(ENCODING));
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return Base64.getEncoder().encodeToString(encryptData);
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}
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/**
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* AES解密
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* @param plainText
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* @param key
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* @return
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* @throws Exception
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*/
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public static String decrypt(String plainText, String key) throws Exception {
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SecretKey secretKey = new SecretKeySpec(key.getBytes(ENCODING), ALGORITHM);
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// 获取 AES 密码器
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Cipher cipher = Cipher.getInstance(PATTERN);
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// 初始化密码器（解密模型）
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cipher.init(Cipher.DECRYPT_MODE, secretKey);
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// 解密数据, 返回明文
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byte[] encryptData = cipher.doFinal(Base64.getDecoder().decode(plainText));
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return new String(encryptData,ENCODING);
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}
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}
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