package com.ld.igds.util;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.lang3.time.DateFormatUtils;
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import org.apache.tomcat.util.codec.binary.Base64;
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import sun.misc.BASE64Decoder;
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import javax.crypto.Cipher;
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import javax.crypto.KeyGenerator;
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import javax.crypto.spec.SecretKeySpec;
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import java.math.BigInteger;
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import java.util.Date;
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/**
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* @author Andy
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* @desc AES 工具类
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*/
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@SuppressWarnings("restriction")
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public class AESUtil {
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private static final String KEY_ALGORITHM = "AES";
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private static final String CHARSET_NAME = "utf-8";
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private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
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/**
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* 将byte[]转为各种进制的字符串
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* @param bytes byte[]
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* @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制
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* @return 转换后的字符串
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*/
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public static String binary(byte[] bytes, int radix){
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// 这里的1代表正数
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return new BigInteger(1, bytes).toString(radix);
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}
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/**
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* base 64 encode
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* @param bytes 待编码的byte[]
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* @return 编码后的base 64 code
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*/
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public static String base64Encode(byte[] bytes){
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return Base64.encodeBase64String(bytes);
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}
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/**
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* base 64 decode
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* @param base64Code 待解码的base 64 code
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* @return 解码后的byte[]
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* @throws Exception
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*/
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public static byte[] base64Decode(String base64Code) throws Exception{
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return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
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}
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/**
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* AES加密
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* @param content 待加密的内容
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* @param encryptKey 加密密钥
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* @return 加密后的byte[]
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* @throws Exception
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*/
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public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
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KeyGenerator kgen = KeyGenerator.getInstance(KEY_ALGORITHM);
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kgen.init(128);
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Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
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cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), KEY_ALGORITHM));
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return cipher.doFinal(content.getBytes(CHARSET_NAME));
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}
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/**
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* AES加密为base 64 code
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* @param content 待加密的内容
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* @param encryptKey 加密密钥
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* @return 加密后的base 64 code
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* @throws Exception
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*/
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public static String aesEncrypt(String content, String encryptKey) {
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try{
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return base64Encode(aesEncryptToBytes(content, encryptKey));
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}catch (Exception e){
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e.printStackTrace();
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return "";
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}
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}
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/**
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* AES解密
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* @param encryptBytes 待解密的byte[]
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* @param decryptKey 解密密钥
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* @return 解密后的String
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* @throws Exception
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*/
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public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
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KeyGenerator kgen = KeyGenerator.getInstance(KEY_ALGORITHM);
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kgen.init(128);
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Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
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cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), KEY_ALGORITHM));
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byte[] decryptBytes = cipher.doFinal(encryptBytes);
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return new String(decryptBytes);
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}
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/**
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* 将base 64 code AES解密
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* @param encryptStr 待解密的base 64 code
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* @param decryptKey 解密密钥
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* @return 解密后的string
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* @throws Exception
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*/
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public static String aesDecrypt(String encryptStr, String decryptKey) {
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try{
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return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
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}catch (Exception e){
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e.printStackTrace();
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return "";
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}
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}
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public static void main(String[] args) throws Exception {
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String content = "456";
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System.out.println("加密前：" + content);
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String encrypt = aesEncrypt(content, "bWFsbHB3ZA==WNST");
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encrypt = "Knk0iOvFAPzMay6++2CuVld6xOjmm3kisyTwgmORHnHaCvNv4TS4RDO/H8+A6DguUaRot65KMiA/DPcM+YdHn67qzzfVZKLiyboqdCeJKgIxamgvhC+KFoLNsvelwP4HasaX9egQ7H+bK7xGiWQPbvma80Q/YePoFP4CCD5PUVv22Tl0mmIkqYD6XFeHxg0GnFo1I1l75urH/7fCeyu2iZymvubir8MDr27wz4SxwDp7A7nqpYEa3S+kHpyGyvNJYcCFFvVnyZPOREyGD2Y5Nsk66jflsfJI9Jb6EiNvPAC+BhFF5XIwVARIx3FMc+JZRZQWlrAFSO3UdxmhhWruww==";
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System.out.println("加密后：" + encrypt);
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String decrypt = aesDecrypt(encrypt, "bWFsbHB3ZA==WNST");
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System.out.println("解密后：" + decrypt);
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Date date = new Date(1559989280*1000L);
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System.out.println("时间：" + DateFormatUtils.format(date,"yyyy-MM-dd HH:mm:ss"));
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}
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}
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