android开发 java与c# 兼容AES加密

由于android客户端采用的是AES加密，服务器用的是asp.net（c#），所以就造成了不一致的加密与解密问题，下面就贴出代码，已经试验过。

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Security.Cryptography;

using System.IO;



namespace BLL

{

    public class AESHelper

    {

        /// <summary>

        /// 有密码的AES加密 

        /// </summary>

        /// <param name="text">加密字符</param>

        /// <param name="password">加密的密码</param>

        /// <param name="iv">密钥</param>

        /// <returns></returns>

        public static string Encrypt(string toEncrypt, string key)

        {

            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);



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

        }



        /// <summary>

        /// AES解密

        /// </summary>

        /// <param name="text"></param>

        /// <param name="password"></param>

        /// <param name="iv"></param>

        /// <returns></returns>

        public static string Decrypt(string toDecrypt, string key)

        {

            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);

        }

    }



}

 

java

import android.util.Base64;

import javax.crypto.Cipher;

import javax.crypto.spec.SecretKeySpec;

/**

 * AES加密器

 * @author Eric_Ni

 *

 */

public class AESEncryptor {

    // 加密

    public static String Encrypt(String sSrc, String sKey) throws Exception {

        if (sKey == null) {

            System.out.print("Key为空null");

            return null;

        }

        // 判断Key是否为16位

        if (sKey.length() != 16) {

            System.out.print("Key长度不是16位");

            return null;

        }

        byte[] raw = sKey.getBytes("utf-8");

        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"

        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));



        return Base64.encodeToString(encrypted,Base64.DEFAULT);//.encodeToString(encrypted,0);//此处使用BASE64做转码功能，同时能起到2次加密的作用。

    }



    // 解密

    public static String Decrypt(String sSrc, String sKey) throws Exception {

        try {

            // 判断Key是否正确

            if (sKey == null) {

                System.out.print("Key为空null");

                return null;

            }

            // 判断Key是否为16位

            if (sKey.length() != 16) {

                System.out.print("Key长度不是16位");

                return null;

            }

            byte[] raw = sKey.getBytes("utf-8");

            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

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

            cipher.init(Cipher.DECRYPT_MODE, skeySpec);

            byte[] encrypted1 = Base64.decode(sSrc,Base64.DEFAULT);//先用base64解密

            try {

                byte[] original = cipher.doFinal(encrypted1);

                String originalString = new String(original,"utf-8");

                return originalString;

            } catch (Exception e) {

                System.out.println(e.toString());

                return null;

            }

        } catch (Exception ex) {

            System.out.println(ex.toString());

            return null;

        }

    }



}

 

我开始在网上看到别人用BASE64,引用的是：import org.apache.commons.codec.binary.Base64;

但是我下载过，又报错Base64().encodeToString  nosuchMethod  烦躁...  

后面改为引用import android.util.Base64;一样可以用，注意 android端采用了静态的方法，不需要new

 

测试数据 android客户端 待加密字符：13 经加密后为：6U64XSoSkheXXhyQ3vxC3Q==

服务器端： 收到字符串：6U64XSoSkheXXhyQ3vxC3Q== 解密后：13

 

参考文档:http://www.oschina.net/code/snippet_242957_9931