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Re: Sanitising input [message #172096 is a reply to message #172084]

Sun, 30 January 2011 19:47

P E Schoen
Messages: 86
Registered: January 2011

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Member

"Mad Hatter" wrote in message
news:1vh6rvby4n32n$(dot)1rlvhdwm2g874$(dot)dlg(at)40tude(dot)net...

> I'm writing a simple script which will take a users input, save it
> to a mysql database and then display it. I'm going to use
> htmlentities() to clean things up which I hope will stop basic
> attacks but how else should I sanitise my input?

I am using www.HTMLpurifier.org and it works quite well. It allows some HTML
and it actually fixes broken or misplaced tags. Here is how I sanitize my
CGI input:

$in = $_POST ; // Get the CGI input variables
require_once 'C:/xampp/htdocs/library/HTMLPurifier.auto.php';
$config = HTMLPurifier_Config::createDefault();
$config->set('Core.Encoding', 'UTF-8'); // replace with your encoding
$config->set('HTML.Doctype', 'XHTML 1.0 Transitional'); // replace with your
doctype
$purifier = new HTMLPurifier($config);

foreach ($in as $key => $value) {
// Write to Raw.htm
fwrite( $fLog, "Raw: $key -> $value\n");
$pure_html = $purifier->purify($value);
$in[$key] = $pure_html;
fwrite( $fLog, "Pure: $key -> $in[$key]\n");
}

Paul

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[Message index]

		Sanitising input By: Mad Hatter on Sun, 30 January 2011 14:09
		Re: Sanitising input By: Michael Fesser on Sun, 30 January 2011 15:00
		Re: Sanitising input By: Denis McMahon on Sun, 30 January 2011 16:35
		Re: Sanitising input By: Norman Peelman on Mon, 31 January 2011 01:17
		Re: Sanitising input By: Captain Paralytic on Mon, 31 January 2011 11:51
		Re: Sanitising input By: Norman Peelman on Mon, 31 January 2011 23:39
		Re: Sanitising input By: Denis McMahon on Tue, 01 February 2011 00:53
		Re: Sanitising input By: Norman Peelman on Tue, 01 February 2011 11:26
		Re: Sanitising input By: Denis McMahon on Mon, 31 January 2011 12:05
		Re: Sanitising input By: P E Schoen on Sun, 30 January 2011 19:47
		Re: Sanitising input By: Felix Saphir on Sun, 30 January 2011 19:55
		Re: Sanitising input By: Ross McKay on Sun, 30 January 2011 21:39
		Re: Sanitising input By: Jerry Stuckle on Sun, 30 January 2011 21:50
		Re: Sanitising input By: Ross McKay on Mon, 31 January 2011 03:43
		Re: Sanitising input By: Jerry Stuckle on Mon, 31 January 2011 04:12
		Re: Sanitising input By: Ross McKay on Mon, 31 January 2011 05:01
		Re: Sanitising input By: Jerry Stuckle on Mon, 31 January 2011 05:10
		Re: Sanitising input By: Ross McKay on Mon, 31 January 2011 05:38
		Re: Sanitising input By: Jerry Stuckle on Mon, 31 January 2011 12:51
		Re: Sanitising input By: Sherm Pendley on Sun, 30 January 2011 22:18
		Re: Sanitising input By: Ross McKay on Mon, 31 January 2011 03:52
		Re: Sanitising input By: Sherm Pendley on Mon, 31 January 2011 05:23

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