Encoding ASCII character 0 terminate query string in classic ASP

Question

I received the encoded querystring which include ASCII Char 0 (http://localhost/Test_Authentication.asp?token=%13%23%02%00%01%01%00%01%01%05%02%02%03%00%02%02%0A%0A%0A%0A%0A%0A048 ) and when I retrieve the value the string is terminated that position (%00). How should I fix this problem?

The following is my code.

Response.CharSet = "utf-8";
Session.CodePage=65001;

var strToken = (Request.QueryString("token").Count > 0)?Request.QueryString("token")(1):"";

Answer 1

%00 is ascii for null character. I suspect this is why the string is being terminated at this point.

I would suggest using a different format or method for your creating your hashed token, perhaps one that creates it as a hexidecimal value instead, e.g.;

B73A21FBCE3921E5DD0C935AB4D710DD

An MD5 hash is typically expressed as a 32-digit hexadecimal number. This will be far more friendly for passing around in querystring.