114 lines
3.1 KiB
Java
114 lines
3.1 KiB
Java
package com.zhgd.mybatis;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.codec.binary.Base64;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* aes 加密的工具类
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* 1.存储 加密的秘钥key
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* 2.实现 aes 加密
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* 3.实现aes解密的功能
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*
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* @author 邱平毅
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*/
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@Slf4j
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public class Aes {
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public Aes() {
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}
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/**
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* 定义 aes 加密的key
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* 密钥 必须是16位, 自定义,
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* 如果不是16位, 则会出现InvalidKeyException: Illegal key size
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* 解决方案有两种：
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* 1.需要安装Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files(可以在Oracle下载).
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* 2.设置设置key的长度为16个字母和数字的字符窜（128 Bit/8=16字符）就不报错了。
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*/
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private static final String KEY = "ZHGDzhdgJXJADMIN";
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/**
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* 定义加密的编码
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*/
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private static final String CHARSET = "utf-8";
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/**
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* 偏移量
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*/
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private static final int OFFSET = 16;
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private static final String TRANSFORMATION = "AES/CBC/PKCS5Padding";
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private static final String ALGORITHM = "AES";
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/**
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* 加密
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*
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* @param content
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* @return
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*/
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public static String encrypt(String content) {
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return encrypt(content, KEY);
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}
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/**
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* 解密
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*
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* @param content
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* @return
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*/
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public static String decrypt(String content) {
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return decrypt(content, KEY);
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}
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/**
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* 加密
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*
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* @param content 需要加密的内容
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* @param key 加密密码
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* @return
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*/
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public static String encrypt(String content, String key) {
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try {
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SecretKeySpec skey = new SecretKeySpec(key.getBytes(), ALGORITHM);
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IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, OFFSET);
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Cipher cipher = Cipher.getInstance(TRANSFORMATION);
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byte[] byteContent = content.getBytes(CHARSET);
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// 初始化
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cipher.init(Cipher.ENCRYPT_MODE, skey, iv);
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byte[] result = cipher.doFinal(byteContent);
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// 加密
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return new Base64().encodeToString(result);
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} catch (Exception e) {
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log.error(e.getMessage());
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}
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return null;
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}
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/**
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* AES（256）解密
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*
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* @param content 待解密内容
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* @param key 解密密钥
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* @return 解密之后
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*/
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public static String decrypt(String content, String key) {
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try {
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SecretKeySpec skey = new SecretKeySpec(key.getBytes(), ALGORITHM);
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IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, OFFSET);
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Cipher cipher = Cipher.getInstance(TRANSFORMATION);
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// 初始化
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cipher.init(Cipher.DECRYPT_MODE, skey, iv);
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byte[] result = cipher.doFinal(new Base64().decode(content));
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// 解密
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return new String(result);
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} catch (Exception e) {
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log.error(e.getMessage());
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}
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return null;
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}
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} |