Java 与 C# 互通的 AES 加密，加密解密结果一致

在实际项目中，遇到 Java 系统与.Net 系统进行对接；由 Java 出发的加密数据需要在.Net 中解密进行下一步的操作，在网上查阅了很多资料，总结出以下两个版本通用的方法，把加密字节通过 Base64 再加密一次，解决传输乱码的问题保证加密解密结果完全一致。

JAVA 版本

AESUtils 工具类

package www.**.**.util;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

/**
 * @author yangps.
 * @version 2018-8-28下午 14:23
 */public class AESUtils {
    //实际的加密解密操作
	private static String Operation(String src, String key, int mode) throws Exception {
		if (key==null) {
			return "Key不能为空";
		}
		if (key.length()!=16) {
			return "Key需要16位长度";
		}
		String result = "";
		byte[] raw = key.getBytes("utf-8");
		SecretKeySpec keySpec = new SecretKeySpec(raw, "AES");
		Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
		if (mode == Cipher.ENCRYPT_MODE) {
			cipher.init(mode, keySpec);
			byte[] encrypted = cipher.doFinal(src.getBytes("utf-8"));
			//将+替换为%2B
	  result = new BASE64Encoder().encode(encrypted).replace("+", "%2B");
		} else {
			cipher.init(mode, keySpec);
			//将%2B替换为+
	  src = src.replace("%2B", "+");
			byte[] encrypted = cipher.doFinal(new BASE64Decoder().decodeBuffer(src));
			result = new String(encrypted, "utf-8");
		}

		return result;
	}

    /**
 * 加密 * * @param src
  * @return
  * @throws Exception
 */  public static String Encrypt(String src, String key) throws Exception {
        return Operation(src, key, Cipher.ENCRYPT_MODE);
    }

    /**
 * 解密 * * @param src
  * @return
  * @throws Exception
 */  public static String Decrypt(String src, String key) throws Exception {
        return Operation(src, key, Cipher.DECRYPT_MODE);
    }

}

​

C#版本

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
namespace Common
{
    public class Encry
    {
        public Encry() { }

        #region AES加密

        public static string Encrypt(string toEncrypt, string key)
        {
		
            if (key == null || key.Length != 16) {
                return "key不能为空并且需要16位长度";
            }
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7; 

            ICryptoTransform cTransform = rDel.CreateEncryptor();  
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            //将+替换为%2B
            string resultArrayAfter = Convert.ToBase64String(resultArray, 0, resultArray.Length);
            resultArrayAfter = resultArrayAfter.Replace("+", "%2B");

            return resultArrayAfter;
        }
        #endregion AES加密

        #region AES解密

        public static string Decrypt(string toDecrypt, string key)
        {
            //将%2B替换为+
            toDecrypt = toDecrypt.Replace("%2B", "+");
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
            byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return UTF8Encoding.UTF8.GetString(resultArray);
        }

        #endregion AES解密
    }
}

​