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Java实现AES工具类（包含CBC和ECB）

2021-06-05 15:05:33 作者：互联网

一、简介

密码学中的高级加密标准（Advanced Encryption Standard，AES），又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准高级加密标准。对称加密算法也就是加密和解密用相同的密钥，具体的加解密流程如下：
在这里插入图片描述
至于AES使用ECB和CBC模式的特点在上一篇文章Java实现3DES工具类（包含CBC和ECB）里有说过，就不再描述了。其实通过Java原生类实现起来都是差不多的，主要在于算法，密钥规范，工作模式的不同。

二、AES工具类

AesUtil.java

package com.alian.csdn.utils;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

/**
 * @program: CSDN
 * @description: Aes工具类
 * @author: Alian
 * @create: 2021-06-05 09:20:10
 **/
public class AesUtil {

    private static final String ALGORITHM = "AES";
    private static final String AES_CBC_PADDING = "AES/CBC/PKCS5Padding";//AES/CBC/PKCS7Padding
    private static final String AES_ECB_PADDING = "AES/ECB/PKCS5Padding";//AES/ECB/PKCS7Padding

    /**
     * 也可以通过这种方式获取密钥
     *
     * @param key
     * @return
     */
    private static SecretKey getSecretKey(byte[] key) {
        try {
            //获取指定的密钥生成器
            KeyGenerator keyGen = KeyGenerator.getInstance(ALGORITHM);
            //加密强随机数
            SecureRandom secureRandom = new SecureRandom();
            secureRandom.setSeed(key);
            //这里可以是128、192、256、越大越安全
            keyGen.init(256, secureRandom);
            return keyGen.generateKey();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("AES获取密钥出现错误,算法异常");
        }
    }

    /**
     * Aes加密(CBC工作模式)
     *
     * @param key   密钥,key长度必须大于等于 3*8 = 24,并且是8的倍数
     * @param keyIv 初始化向量,keyIv长度必须等于16
     * @param data  明文
     * @return 密文
     * @throws Exception
     */
    public static byte[] encodeByCBC(byte[] key, byte[] keyIv, byte[] data)
            throws Exception {
        //获取SecretKey对象,也可以使用getSecretKey()方法
        Key secretKey = new SecretKeySpec(key, ALGORITHM);
        //获取指定转换的密码对象Cipher（参数：算法/工作模式/填充模式）
        Cipher cipher = Cipher.getInstance(AES_CBC_PADDING);
        //创建向量参数规范也就是初始化向量
        IvParameterSpec ips = new IvParameterSpec(keyIv);
        //用密钥和一组算法参数规范初始化此Cipher对象（加密模式）
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ips);
        //执行加密操作
        return cipher.doFinal(data);
    }

    /**
     * Aes加密(ECB工作模式)
     *
     * @param key   密钥,key长度必须大于等于 3*8 = 24,并且是8的倍数
     * @param keyIv 初始化向量,keyIv长度必须等于16
     * @param data  密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] decodeByCBC(byte[] key, byte[] keyIv, byte[] data)
            throws Exception {
        //获取SecretKey对象,也可以使用getSecretKey()方法
        Key secretKey = new SecretKeySpec(key, ALGORITHM);
        //获取指定转换的密码对象Cipher（参数：算法/工作模式/填充模式）
        Cipher cipher = Cipher.getInstance(AES_CBC_PADDING);
        //创建向量参数规范也就是初始化向量
        IvParameterSpec ips = new IvParameterSpec(keyIv);
        //用密钥和一组算法参数规范初始化此Cipher对象（加密模式）
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ips);
        //执行加密操作
        return cipher.doFinal(data);
    }

    /**
     * Aes加密(ECB工作模式),不要IV
     *
     * @param key  密钥,key长度必须大于等于 3*8 = 24,并且是8的倍数
     * @param data 明文
     * @return 密文
     * @throws Exception
     */
    public static byte[] encodeByECB(byte[] key, byte[] data) throws Exception {
        //获取SecretKey对象,也可以使用getSecretKey()方法
        SecretKey secretKey = new SecretKeySpec(key, ALGORITHM);
        //获取指定转换的密码对象Cipher（参数：算法/工作模式/填充模式）
        Cipher cipher = Cipher.getInstance(AES_ECB_PADDING);
        //用密钥和一组算法参数规范初始化此Cipher对象（加密模式）
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        //执行加密操作
        return cipher.doFinal(data);
    }

    /**
     * Aes解密(ECB工作模式),不要IV
     *
     * @param key  密钥,key长度必须大于等于 3*8 = 24,并且是8的倍数
     * @param data 密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] decodeByECB(byte[] key, byte[] data) throws Exception {
        //获取SecretKey对象,也可以使用getSecretKey()方法
        SecretKey secretKey = new SecretKeySpec(key, ALGORITHM);
        //获取指定转换的密码对象Cipher（参数：算法/工作模式/填充模式）
        Cipher cipher = Cipher.getInstance(AES_ECB_PADDING);
        //用密钥和一组算法参数规范初始化此Cipher对象（加密模式）
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        //执行加密操作
        return cipher.doFinal(data);
    }
}

三、实践

AES加密key的长度至少为24位并且是8的倍数
AES里CBC模式的加解密初始化向量的长度为16
AES里加解密的时候密钥要保持一致

3.1 AES之ECB模式加密

    /**
     * AES加密之ECB加密
     * 此处单元测试的注解是采用:org.junit.Test
     * @throws Exception
     */
    @Test
    public void ecbEncode() throws Exception {
        System.out.println("------------------AES加密之ECB加密转base64------------------");
        //key的长度至少为24位并且是8的倍数（比如32，40等等）
        String aesKey = "ee1b7d9ca0b7d10d2cd27f35d34bb412";
        String plainText = "<root><out_refund_no>20180608163757915497</out_refund_no><out_trade_no>15070411211528250141228</out_trade_no><refund_account>REFUND_SOURCE_RECHARGE_FUNDS</refund_account><refund_fee>1</refund_fee><refund_id>50000607002018060805036784330</refund_id><refund_recv_accout>支付用户零钱</refund_recv_accout><refund_request_source>API</refund_request_source><refund_status>SUCCESS</refund_status><settlement_refund_fee>1</settlement_refund_fee><settlement_total_fee>1</settlement_total_fee><success_time>2018-06-08 16:38:05</success_time><total_fee>1</total_fee><transaction_id>4200000129201806063432463966</transaction_id></root>";
        System.out.println("ECB加密原始数据：" + plainText);
        byte[] key = aesKey.getBytes(StandardCharsets.UTF_8);
        byte[] data = plainText.getBytes(StandardCharsets.UTF_8);
        //ECB模式加密
        byte[] encode = AesUtil.encodeByECB(key, data);
        System.out.println("ECB加密后转Base64的数据：" + Base64.getEncoder().encodeToString(encode));
    }

运行结果：

------------------AES加密之ECB加密转base64------------------
ECB加密原始数据：<root><out_refund_no>20180608163757915497</out_refund_no><out_trade_no>15070411211528250141228</out_trade_no><refund_account>REFUND_SOURCE_RECHARGE_FUNDS</refund_account><refund_fee>1</refund_fee><refund_id>50000607002018060805036784330</refund_id><refund_recv_accout>支付用户零钱</refund_recv_accout><refund_request_source>API</refund_request_source><refund_status>SUCCESS</refund_status><settlement_refund_fee>1</settlement_refund_fee><settlement_total_fee>1</settlement_total_fee><success_time>2018-06-08 16:38:05</success_time><total_fee>1</total_fee><transaction_id>4200000129201806063432463966</transaction_id></root>
ECB加密后转Base64的数据：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

3.2 AES之ECB模式解密

    /**
     * AES加密之ECB解密
     * 此处单元测试的注解是采用:org.junit.Test
     * @throws Exception
     */
    @Test
    public void ecbDecode() throws Exception {
        System.out.println("------------------AES加密之ECB解密------------------");
        //和加密时密钥一样
        String aesKey = "ee1b7d9ca0b7d10d2cd27f35d34bb412";
        //base64编码后的字符串
        String plainText = "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";
        System.out.println("ECB解密原始数据：" + plainText);
        //因为原始字符串经过base64编码后的字符串
        byte[] key = aesKey.getBytes(StandardCharsets.UTF_8);
        byte[] data = Base64.getDecoder().decode(plainText);
        //ECB模式解密
        byte[] decodeStr = AesUtil.decodeByECB(key, data);
        System.out.println("ECB解密后转字符串数据：" + new String(decodeStr, StandardCharsets.UTF_8));
    }

运行结果：

------------------AES加密之ECB解密------------------
ECB解密原始数据：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
ECB解密后转字符串数据：<root><out_refund_no>20180608163757915497</out_refund_no><out_trade_no>15070411211528250141228</out_trade_no><refund_account>REFUND_SOURCE_RECHARGE_FUNDS</refund_account><refund_fee>1</refund_fee><refund_id>50000607002018060805036784330</refund_id><refund_recv_accout>支付用户零钱</refund_recv_accout><refund_request_source>API</refund_request_source><refund_status>SUCCESS</refund_status><settlement_refund_fee>1</settlement_refund_fee><settlement_total_fee>1</settlement_total_fee><success_time>2018-06-08 16:38:05</success_time><total_fee>1</total_fee><transaction_id>4200000129201806063432463966</transaction_id></root>

格式化结果如下：

<root>
  <out_refund_no>20180608163757915497</out_refund_no>
  <out_trade_no>15070411211528250141228</out_trade_no>
  <refund_account>REFUND_SOURCE_RECHARGE_FUNDS</refund_account>
  <refund_fee>1</refund_fee>
  <refund_id>50000607002018060805036784330</refund_id>
  <refund_recv_accout>支付用户零钱</refund_recv_accout>
  <refund_request_source>API</refund_request_source>
  <refund_status>SUCCESS</refund_status>
  <settlement_refund_fee>1</settlement_refund_fee>
  <settlement_total_fee>1</settlement_total_fee>
  <success_time>2018-06-08 16:38:05</success_time>
  <total_fee>1</total_fee>
  <transaction_id>4200000129201806063432463966</transaction_id>
</root>

3.3 AES之CBC模式加密

    /**
     * AES加密之CBC加密转base64
     * 此处单元测试的注解是采用:org.junit.Test
     * @throws Exception
     */
    @Test
    public void cbcEncode() throws Exception {
        System.out.println("------------------AES加密之CBC加密转base64------------------");
        String desKey = "4c1ab02124f0941fbc01f902be421843";
        //初始化向量的长度为16
        String keyIv = "12345678abcdefgh";
        String plainText = "{\"txncode\":\"QueryInvoice\",\"instid\":\"10000006\",\"mchntid\":\"100000060000001\",\"netid\":\"040000280001\",\"posid\":\"040000280001\",\"oprid\":\"wtsd001\",\"serialNo\":\"04000028000121052148281221\",\"postTime\":\"2021-06-03 00:08:00\",\"responsecode\":\"000000\",\"responsedesc\":\"成功\",\"messageList\":{\"code\":\"03702170021109363363\",\"viewUrl\":\"https://www.chinaeinv.com/p.jspa?c=15E38CA48E906F7985CF\",\"pdfUnsignedUrl\":\"https://www.chinaeinv.com/pdf.jspa?c=15E38CA48E906F7985CF\",\"generateTime\":\"2021-05-21 17:46:29\",\"totalAmount\":\"50\"}}";
        System.out.println("CBC加密原始数据：" + plainText);
        byte[] key = desKey.getBytes(StandardCharsets.UTF_8);
        byte[] data = plainText.getBytes(StandardCharsets.UTF_8);
        byte[] encode = AesUtil.encodeByCBC(key, keyIv.getBytes(StandardCharsets.UTF_8), data);
        System.out.println("CBC加密后转Base64的数据：" + Base64.getEncoder().encodeToString(encode));
    }

运行结果：

------------------AES加密之CBC加密转base64------------------
CBC加密原始数据：{"txncode":"QueryInvoice","instid":"10000006","mchntid":"100000060000001","netid":"040000280001","posid":"040000280001","oprid":"wtsd001","serialNo":"04000028000121052148281221","postTime":"2021-06-03 00:08:00","responsecode":"000000","responsedesc":"成功","messageList":{"code":"03702170021109363363","viewUrl":"https://www.chinaeinv.com/p.jspa?c=15E38CA48E906F7985CF","pdfUnsignedUrl":"https://www.chinaeinv.com/pdf.jspa?c=15E38CA48E906F7985CF","generateTime":"2021-05-21 17:46:29","totalAmount":"50"}}
CBC加密后转Base64的数据：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

3.4 AES之CBC模式解密

    /**
     * AES加密之CBC解密
     * 此处单元测试的注解是采用:org.junit.Test
     * @throws Exception
     */
    @Test
    public void cbcDecode() throws Exception {
        System.out.println("------------------AES加密之CBC解密------------------");
        //和加密时密钥一样
        String desKey = "4c1ab02124f0941fbc01f902be421843";
        String plainText = "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";
        String keyIv = "12345678abcdefgh";
        System.out.println("CBC解密原始数据：" + plainText);
        byte[] key = desKey.getBytes(StandardCharsets.UTF_8);
        //因为结果时
        byte[] data = Base64.getDecoder().decode(plainText);
        byte[] decodeStr = AesUtil.decodeByCBC(key, keyIv.getBytes(StandardCharsets.UTF_8), data);
        System.out.println("CBC解密后转字符串数据：" + new String(decodeStr, StandardCharsets.UTF_8));
    }

运行结果：

------------------AES加密之CBC解密------------------
CBC解密原始数据：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
CBC解密后转字符串数据：{"txncode":"QueryInvoice","instid":"10000006","mchntid":"100000060000001","netid":"040000280001","posid":"040000280001","oprid":"wtsd001","serialNo":"04000028000121052148281221","postTime":"2021-06-03 00:08:00","responsecode":"000000","responsedesc":"成功","messageList":{"code":"03702170021109363363","viewUrl":"https://www.chinaeinv.com/p.jspa?c=15E38CA48E906F7985CF","pdfUnsignedUrl":"https://www.chinaeinv.com/pdf.jspa?c=15E38CA48E906F7985CF","generateTime":"2021-05-21 17:46:29","totalAmount":"50"}}

格式化后结果如下：

{
	"txncode": "QueryInvoice",
	"instid": "10000006",
	"mchntid": "100000060000001",
	"netid": "040000280001",
	"posid": "040000280001",
	"oprid": "wtsd001",
	"serialNo": "04000028000121052148281221",
	"postTime": "2021-06-03 00:08:00",
	"responsecode": "000000",
	"responsedesc": "成功",
	"messageList": {
		"code": "03702170021109363363",
		"viewUrl": "https://www.chinaeinv.com/p.jspa?c=15E38CA48E906F7985CF",
		"pdfUnsignedUrl": "https://www.chinaeinv.com/pdf.jspa?c=15E38CA48E906F7985CF",
		"generateTime": "2021-05-21 17:46:29",
		"totalAmount": "50"
	}
}

从以上格式化的结果和最开始结果，我们可以看到数据实现了加密和解密并保护了数据的完整性。微信其实也使用到了AES加密方式，后续我会针对微信退款异步通知的接口写一个实例，避免大家躺坑。

结语

以上就是今天要讲的内容，本文仅仅简单介绍了AES，简单编写了一个AesUtil工具类,包含了CBC和ECB两种模式，整体上和DES工具类是差不多的，主要在于算法，密钥规范，工作模式的不同。，有兴趣的同学可以先去了解一下AES算法的原理，希望对您有所帮助，欢迎大家评论交流。

标签：CBC,AES,Java,ECB,key,加密,byte
来源： https://blog.csdn.net/Alian_1223/article/details/117589449

Java实现AES工具类（包含CBC和ECB）

目录

一、简介

二、AES工具类

三、实践

3.1 AES之ECB模式加密

3.2 AES之ECB模式解密

3.3 AES之CBC模式加密

3.4 AES之CBC模式解密

结语