//数字证书加密加密对称密钥   POutSYMKEY对称密钥长度为8位 加密没有问题
         string CerName = FileUpload2.PostedFile.FileName;
        //  X509Certificate2 myX509Certificate2 = new X509Certificate2(CerName);
        X509Certificate2 myX509Certificate2 = new X509Certificate2(FileUpload2.PostedFile.FileName);
        //从证书中获得含公钥的RSACryptoServiceProvider
        RSACryptoServiceProvider publickeyProvider = (RSACryptoServiceProvider)myX509Certificate2.PublicKey.Key;
        byte[] EncryedKey = publickeyProvider.Encrypt(POutSYMKEY, false);使用接口函数解密
        
        byte[] POutSYMKEY = new byte[8];
        UInt32 POutSYMKEYLen = 8;
        
       UInt32 rv = Usb_RSAUseInPrivKeyDecData(hkey, 1, EncryedKey, 128, POutSYMKEY, ref POutSYMKEYLen);//出现问题 假如这个函数的输出和输入相同的话,就是说128位的输入只能有128的输入 我应该怎么处理啊