friendica_2021-01/library/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
Alexander Kampmann 355c42cb30 Merge branch 'master' of https://github.com/friendica/friendica
Conflicts:
	include/config.php
	update.php
2012-04-05 13:39:15 +02:00

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URI.MungeSecretKey
TYPE: string/null
VERSION: 3.1.1
DEFAULT: NULL
--DESCRIPTION--
<p>
This directive enables secure checksum generation along with %URI.Munge.
It should be set to a secure key that is not shared with anyone else.
The checksum can be placed in the URI using %t. Use of this checksum
affords an additional level of protection by allowing a redirector
to check if a URI has passed through HTML Purifier with this line:
</p>
<pre>$checksum === sha1($secret_key . ':' . $url)</pre>
<p>
If the output is TRUE, the redirector script should accept the URI.
</p>
<p>
Please note that it would still be possible for an attacker to procure
secure hashes en-mass by abusing your website's Preview feature or the
like, but this service affords an additional level of protection
that should be combined with website blacklisting.
</p>
<p>
Remember this has no effect if %URI.Munge is not on.
</p>
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