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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 

android开发 java与c# 兼容AES加密