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FAQ for the Login & Password Sample

Tuesday Jan 1st 2008 by From ASP101

Secure an ASP page simply and easily.

By John Peterson

Both the username and password are case-sensitive. How can I change it so they are not?

Let me start by saying that I recommend that you use case-sensitive usernames and passwords. Case-sensitivity adds an additional level of complexity and can make it harder for unauthorized users to guess a user's credentials. That being said, if you must make your usernames and/or passwords case-insensitive, it's actually quite easy to do.

All you need to do is convert both the entered value and the stored value to the same case before you compare them. I usually use LCase to make them both lower case, but using UCase to make them upper case works exactly the same way.

As an example, here's the original line from the classic ASP version of the sample.

If Request.Form("login") = "Guest" AND Request.Form("password") = "Guest" Then

By simply adding a few calls to LCase, the code below totally ignores the cases of the characters entered.

If LCase(Request.Form("login")) = LCase("Guest") AND LCase(Request.Form("password")) = LCase("Guest") Then

If you're going to do this, I recommend you only switch to the case-insensitive values in the comparison code and not in the code that retrieves or stores the values. Storing the username and password exactly as the user entered them allows you to easily move to a case-sensitive routine at some future date should the need arise.

How do I protect a large number of files?

If you're trying to protect multiple files based on the same criteria, the best way to do it is to create one protection script and include it in all the files by using a server side include. If you include it into each file you want to protect, then any changes you make to it will automatically go into effect for all the files. It makes managing things much easier.

How do I secure files that are not .asp?

This sample was designed to work with .asp files. If you need to secure other types of files you should look into using NT permissions or a third party component.

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