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Java、C#双语版配套AES加解密示例

时间:2015-03-13 20:40:49      阅读:640      评论:0      收藏:0      [点我收藏+]

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  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

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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");
    }
}
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C#版

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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);
        }
    }
}

Java、C#双语版配套AES加解密示例

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原文地址:http://www.cnblogs.com/parning/p/4335808.html

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