[MyBB] Improved password encryption.

Sound4life · 28-03-2021, 11:53 PM

This makes it exceedingly difficult for an attacker to decrypt the password hashes on your forum. I recommend doing this while you have a small amount of members on your forum.

First up, open inc/functions_user.php in your favourite text editor, search for the following function.
PHP Code:

Code:
function salt_password($password, $salt)
 {
   return md5(md5($salt).$password);
 }

Come up with a random 5 character long combination of letters and numbers, I'm going to use 3g45h in the example.

Modify the above function so that it looks like this:
PHP Code:

Code:
function salt_password($password, $salt)
 {
   return md5(md5(md5($salt).$password)."3g45h");
 }

It may seem a little overboard, but the security of your members passwords is the most important thing.

Open PHPMyAdmin and navigate to your mybb_users table, manually update each users password, by following the next step.
Open http://www.adamek.biz/md5-generator.php then enter the users current password hash, with your 5 random characters at the end.

For example.

Code:
1a79a4d60de6718e8e5b326e338ae533

Becomes

Code:
1a79a4d60de6718e8e5b326e338ae5333g45h

Click "Calculate MD5".

Copy the new hash and replace the users old password.

Upload your modified functions_user.php to your server.

Now if an attacker attempts to crack the hashes, it's useless unless they know your 5 random characters.

[MyBB] Improved password encryption.

Submitted by Sound4life, 28-03-2021, 11:53 PM, Thread ID: 201932