Solved

ASP code filter

Posted on 2008-06-15
5
294 Views
Last Modified: 2008-08-22
i am after suggestions for a good piece of code/script/plugin for checking/cleaning text that a user can enter, to ensure there is no injection, or potentially unwanted entry.

i have an asp site that users can log into and update there profile information, i would like for them to be able to enter some html formatting rather than straight text only, however i need to ensure that they cant be malicious and inject anything.t
one solution i had was to give them a standard format, eg Leadtext, Bullet point 1, Bullet point 2, Bullet point 3, Bullet point 4, EndText. However his is little better than what i have now.

Any suggestions guys.
Points will be split amoungst all that offer good advise,
Please bear in mind that i am by no means an experianced programer.

Cheers
Andrew
0
Comment
Question by:Andrew Davis
  • 2
  • 2
5 Comments
 
LVL 6

Expert Comment

by:dxz2
ID: 21791105
This is a free plugin that can be easily installed and has a lot of useful functions to work with string
http://www.chilkatsoft.com/refdoc/xCkStringRef.html

and example page

http://www.example-code.com/asp/aspstring.asp
0
 
LVL 18

Author Comment

by:Andrew Davis
ID: 21791452
Thanks for that dxz2 it looks like they have some interesting tools, however i had a look at the tool it appears to me that it can strip the HTML tags altogether, however i want the users to be able to use html but i need it checked to ensure there are no nasties in it, eg database injection

cheers
0
 
LVL 6

Accepted Solution

by:
dxz2 earned 350 total points
ID: 21791502
check this url explaining how you can protect yourself from sql injections http://www.4guysfromrolla.com/webtech/061902-1.shtml.
0
 
LVL 15

Assisted Solution

by:dosth
dosth earned 150 total points
ID: 21791523
http://www.ariel.web.id/blog/2007/03/15/checking-refferer-prevent-html-form-hijacking/

also before saving the user input to database, check for any <script></script> tag, usally injections done with this tag. use instr function to check any <script> tags is there and tell the user to remove the tags

http://www.w3schools.com/Vbscript/func_instr.asp
0
 
LVL 15

Expert Comment

by:dosth
ID: 22287623
thanks
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I recently decide that I needed a way to make my pages scream on the net.   While searching around how I can accomplish this I stumbled across a great article that stated "minimize the server requests." I got to thinking, hey, I use more than one…
I would like to start this tip/trick by saying Thank You, to all who said that this could not be done, as it forced me to make sure that it could be accomplished. :) To start, I want to make sure everyone understands the importance of utilizing p…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question