C#对接JAVA系统遇到的AES加密坑

起因对接合作伙伴的系统，需要对数据进行AES加密

默认的使用了已经写好的帮助类中加密算法，发现结果不对，各种尝试改变加密模式改变向量等等折腾快一下午。最后网上查了下AES在JAVA里面的实现完整代码如下：

public  static  String AesEncrypt(String content,String encyKey) {
        try  {
            KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
            SecureRandom secureRandom = SecureRandom.getInstance( "SHA1PRNG" );
            secureRandom.setSeed(encyKey.getBytes());
            kgen.init( 128 , secureRandom);
            Cipher cipher=Cipher.getInstance( "AES" );
            cipher.init(Cipher.DECRYPT_MODE, new  SecretKeySpec(kgen.generateKey().getEncoded(), "AES" ));
            byte [] byteContent = content.getBytes( "utf-8" );
            byte [] result = cipher.doFinal(byteContent);
            BASE64Encoder  encode =  new  BASE64Encoder ();
            String strResult=encode.encode(result);
            return  strResult;
        }  catch  (Exception e) {
            e.printStackTrace();
        }
        return  null ;
  }

 根据博主：http://www.cnblogs.com/amylis_chen/p/6107162.html#commentform  的经验有了思路

解决办法，通过JAVA代码生成AES的密钥，再通过C#代码进行AES加密

//JAVA代码生成密钥
        String encyKey= "合作伙伴提供的密钥 " ;
        KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
        java.security.SecureRandom random = java.security.SecureRandom.getInstance( "SHA1PRNG" );
        random.setSeed(encyKey.getBytes());
        kgen.init( 128 , random);
        SecretKey secretKey = kgen.generateKey();
        byte [] enCodeFormat = secretKey.getEncoded();
        BASE64Encoder coder =  new  BASE64Encoder();
        System.out.println(coder.encode(enCodeFormat));

 

C#代码进行AES加密

class  Program
   {
       static  void  Main( string [] args)
       {
           //默认密钥向量
           var  result = AESEncode( "123456" ,  "JAVA代码输出的密钥" );
           Console.WriteLine(result);
           Console.ReadLine();

       }
       public  static  string  AESEncode( string  encryptString,  string  encryptKey)
       {
           if  ( string .IsNullOrEmpty(encryptString))  return  null ;
           Byte[] toEncryptArray = Encoding.UTF8.GetBytes(encryptString);
           RijndaelManaged rm =  new  RijndaelManaged
           {
               Key = Convert.FromBase64String(encryptKey),
               Mode = CipherMode.ECB,
               Padding = PaddingMode.PKCS7
           };
           ICryptoTransform cTransform = rm.CreateEncryptor();
           Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
           return  Convert.ToBase64String(resultArray, 0, resultArray.Length);
       }
   }

转载于:https://www.cnblogs.com/tsql/p/9435711.html