android開發 java與c# 相容AES加密

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由於android用戶端採用的是AES加密，伺服器用的是asp.net（c#），所以就造成了不一致的加密與解密問題，下面就貼出代碼，已經實驗過。

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>        /// 有密碼的AES加密         /// </summary>        /// <param name="text">加密字元</param>        /// <param name="password">加密的密碼</param>        /// <param name="iv">密鑰</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為空白null");            return null;        }        // 判斷Key是否為16位        if (sKey.length() != 16) {            System.out.print("Key長度不是16位");            return null;        }        byte[] raw = sKey.getBytes("utf-8");        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"演算法/模式/補碼方式"        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));        return Base64.encodeToString(encrypted,Base64.DEFAULT);//.encodeToString(encrypted,0);//此處使用BASE64做轉碼功能，同時能起到2次加密的作用。    }    // 解密    public static String Decrypt(String sSrc, String sKey) throws Exception {        try {            // 判斷Key是否正確            if (sKey == null) {                System.out.print("Key為空白null");                return null;            }            // 判斷Key是否為16位            if (sKey.length() != 16) {                System.out.print("Key長度不是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;        }    }}

 

我開始在網上看到別人用BASE64,引用的是：import org.apache.commons.codec.binary.Base64;

但是我下載過，又報錯Base64().encodeToString  nosuchMethod  煩躁...  

後面改為引用import android.util.Base64;一樣可以用，注意 android端採用了靜態方法，不需要new

 

測試資料 android用戶端 待加密字元：13 經加密後為：6U64XSoSkheXXhyQ3vxC3Q==

伺服器端： 收到字串：6U64XSoSkheXXhyQ3vxC3Q== 解密後：13

 

參考文檔:http://www.oschina.net/code/snippet_242957_9931 

android開發 java與c# 相容AES加密