无效的长度为Base-64字符数组，而解密 [英] Invalid length for a Base-64 char array while decryption

问题描述

我打通（解密）在某些情况下，以下异常，我无法准确识别的原因：

I get the following exception in some cases through (decryption) , and i can't recognize exactly the reason :

对于一个base-64字符数组的无效长度

Invalid length for a Base-64 char array

我的code：

public static string encodeSTROnUrl(string thisEncode)
{
  if (null == thisEncode)
      return string.Empty;

  return HttpUtility.UrlEncode(Encrypt(thisEncode));
}


// string thisDecode = "3Dn%2bsJJPXprU4%3d"; //this is the value which cause the exception.
public static string decodeSTROnUrl(string thisDecode)
{
   return Decrypt(HttpUtility.UrlDecode(thisDecode));
}


QueryStringEncryption.Cryptography.decodeSTROnUrl(Request.QueryString["val"].ToString());

这抛出异常的确切行是：

The exact line which throw the exception is :

 Byte[] byteArray = Convert.FromBase64String(text);

我想我之前的加密和解密operation.but一些值仍然抛出这个异常后，通过固定编码和解码这个问题。

I thought i fix this problem by encoding and decoding before and after the encryption and the decryption operation.but some values still throw this exception .

请注意：我注意到一些奇怪的行为：
该ID作为发送到我的邮箱查询字符串是： N％2bsJJPXprU4％3D 和它的作品没有例外。

Note: i note some strange behavior : the id as a query string sent to my mail is : n%2bsJJPXprU4%3d and it works without exceptions ..

和谁的发送URL包含问题的用户 3DN％2bsJJPXprU4％3D

and the user who has the problem the sent url contains 3Dn%2bsJJPXprU4%3d

这是一个浏览器的问题?? !!

is this a browser problem ??!!

推荐答案

解码查询字符串值是当它解析为请求已经完成。尝试没有
HttpUtility.UrlDe code

Decoding the querystring values is done already when it's parsed into the Request. try without 'HttpUtility.UrlDecode'

public static string decodeSTROnUrl(string thisDecode)
    {
        return Decrypt(thisDecode);
    }

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