Mediawiki/Anonymous IP Hash: Difference between revisions

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Here's the gist of my anon ID hack to MediaWiki. I can't really package it as an extension or anything because it involves hacking things that
Here's the gist of my anon ID hack to MediaWiki. I can't really package it as an extension or anything because it involves hacking things that
apparently aren't supposed to be hacked, but it's not hard to do. - Halcy
apparently aren't supposed to be hacked, but it's not hard to do. - Halcy <!-- Note that this mod makes banning edits quite hard. Maybe if there was a way to just not show the IP address to non-Admin users, and still store the IP in the database, that would be better. But on the flip side, tanasinn.info seems to be doing fine. -->
 
<!-- Note that this mod makes banning edits quite hard. Maybe if there was a way to just don't show the IP address to non-Admin users, and still store the IP in the database, that would be better. -->


1. Add the following to your LocalSettings.php:
1. Add the following to your LocalSettings.php:
Line 11: Line 9:
$wgDisableAnonTalk = true;
$wgDisableAnonTalk = true;
function AnonUsername($IP) {
function AnonUsername($IP) {
        $key = $IP.'PUT RANDOM TEXT HERE';
         // Expiry time for hashes: dmY = new ID per day, WY = per week.
         // Alternatively, you can use this function to further anonymize, but it makes it harder to ban robots: dmY = new ID per day, WY = per week.
         $key = $IP.'PUT RANDOM TEXT HERE'.gmdate('dmY');
         //$key = $IP.'PUT RANDOM TEXT HERE'.gmdate('dmY');
         return 'ID:'.substr(password_hash($key, PASSWORD_DEFAULT), 'id'), 8, 8); // uses bcrypt level 10
         return 'ID:'.substr(password_hash($key, PASSWORD_DEFAULT), 'id'), 8, 8); // uses bcrypt level 10
}
}

Revision as of 19:59, 9 December 2016

Here's the gist of my anon ID hack to MediaWiki. I can't really package it as an extension or anything because it involves hacking things that apparently aren't supposed to be hacked, but it's not hard to do. - Halcy

1. Add the following to your LocalSettings.php: 

// you can leave anon talk pages on, but you'll
// likely end up with useless crud after IDs expire
$wgDisableAnonTalk = true;
function AnonUsername($IP) {
        // Expiry time for hashes: dmY = new ID per day, WY = per week.
        $key = $IP.'PUT RANDOM TEXT HERE'.gmdate('dmY');
        return 'ID:'.substr(password_hash($key, PASSWORD_DEFAULT), 'id'), 8, 8); // uses bcrypt level 10
}

The ID is a truncated hash, which, although it increases the risk of collisions, that may be a benefit rather than a liability when it comes to IPs. http://www.perlmonks.org/?node_id=111524

Warning: Beware that hashing is not a completely safe way to protect IPs, but if you use a good salt and bcrypt it can stop attackers for a few years.
Note: Obviously you'd change the "PUT RANDOM TEXT HERE" to some random text: this functions as the salt and reduces the risk of brute force attacks. Just bang on the keyboard for a bit, or if you want to be truly random, get an RNG or just roll some dice.

2. In includes/user/User.php, (Mediawiki 1.27.1: getName() Line 2109) find the line that says: 

   $this->mName = IP::sanitizeIP( $this->getRequest()->getIP() );

and change it to: 

   $this->mName = AnonUsername( $this->getRequest()->getIP() );

3. In includes/user/User.php, (Mediawiki 1.27.1: getBlockedStatus() Line 1600) find the line that says: 

   : IP::sanitizeIP( $wgUser->getRequest()->getIP() );

and change it to: 

   : AnonUsername( $this->getRequest()->getIP() );

You will need to repeat this mod whenever you update MediaWiki, since obviously an update replaces the system files. And of course the lines may vary, but have generally been similar.

aa tags

On a slightly related note, I hacked an extension together for <aa> tags.

  • Music:DQN-kun / >>6 is not a panda

http://storlek.livejournal.com/47939.html?thread=47171

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