Software: Apache/2.4.53 (Unix) OpenSSL/1.1.1o PHP/7.4.29 mod_perl/2.0.12 Perl/v5.34.1. PHP/7.4.29 uname -a: Linux vps-2738122-x 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023 x86_64 uid=1(daemon) gid=1(daemon) grupos=1(daemon) Safe-mode: OFF (not secure) /opt/apex_led/php/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/ drwxrwxr-x | |
| Viewing file: Select action/file-type: 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 === hash_hmac("sha256", $url, $secret_key)</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>
--# vim: et sw=4 sts=4
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