转载：Java、C#双语版配套AES加解密示例

2022-10-31 10:46:04

转载，原文出处

http://www.cnblogs.com/lzrabbit/p/3639503.html

　　这年头找个正经能用的东西那是真难，网上一搜索一大堆，正经能用的没几个，得，最后还是得靠自己，正巧遇上需要AES加解密的地方了，而且还是Java和C#间的相互加解密操作，这里做个备忘

　　这里采用的加解密使用base64转码方法，ECB模式，PKCS5Padding填充，密码必须是16位，否则会报错哈

　　模式：Java的ECB对应C#的System.Security.Cryptography.CipherMode.ECB

　　填充方法：Java的PKCS5Padding对应C#System.Security.Cryptography.PaddingMode.PKCS7

　　Java和C#版的加解密是互通的，也就是能相互加解密，编码明确指定了采用UTF-8，有需要其他编码方法的请自行扩展

Java版

package nb.tmall.util;

import java.security.NoSuchAlgorithmException;

import java.security.SecureRandom;

import javax.crypto.*;

import javax.crypto.spec.SecretKeySpec;

import sun.misc.*;

@SuppressWarnings("restriction")

public class EncryptUtil {

    public static String aesEncrypt(String str, String key) throws Exception {

        if (str == null || key == null) return null;

        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "AES"));

        byte[] bytes = cipher.doFinal(str.getBytes("utf-8"));

        return new BASE64Encoder().encode(bytes);

    }

    public static String aesDecrypt(String str, String key) throws Exception {

        if (str == null || key == null) return null;

        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "AES"));

        byte[] bytes = new BASE64Decoder().decodeBuffer(str);

        bytes = cipher.doFinal(bytes);

        return new String(bytes, "utf-8");

    }

}

C#版

using System;

using System.Security.Cryptography;

using System.Text;

namespace CSharp.Util.Security

{

        /// <summary>

        ///  AES 加密

        /// </summary>

        /// <param name="str"></param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static string AesEncrypt(string str, string key)

        {

            if (string.IsNullOrEmpty(str)) return null;

            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged

            {

                Key = Encoding.UTF8.GetBytes(key),

                Mode = System.Security.Cryptography.CipherMode.ECB,

                Padding = System.Security.Cryptography.PaddingMode.PKCS7

            };

            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateEncryptor();

            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, 0, resultArray.Length);

        }

        /// <summary>

        ///  AES 解密

        /// </summary>

        /// <param name="str"></param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static string AesDecrypt(string str, string key)

        {

            if (string.IsNullOrEmpty(str)) return null;

            Byte[] toEncryptArray = Convert.FromBase64String(str);

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged

            {

                Key = Encoding.UTF8.GetBytes(key),

                Mode = System.Security.Cryptography.CipherMode.ECB,

                Padding = System.Security.Cryptography.PaddingMode.PKCS7

            };

            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();

            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Encoding.UTF8.GetString(resultArray);

        }

    }

}

码农公寓

转载，原文出处

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