PHP MD5 with appended salt

Olivier Beytrison olivier at
Wed Mar 6 18:00:18 CET 2013

On 06.03.2013 17:29, René Klomp wrote:
> Hi all,
> I am trying to connect my freeradius server to a mysql database containing all users. I created a new view to represent the table structure needed by freeradius, but I a problem with validating the passwords.
> The passwords of my users are (from a PHP application) concatenated with a salt, which is the same for all passwords, and stored using the regular php md5 function: md5($userpass . ':' . $salt)
> How can I make freeradius to append this salt to the password as well and validate the password in the correct way? Is there a default way to do this? Or should I create a module to do this?
First question, how are your users identifying with freeradius ? PAP ? 

If the password is sent in clear by the user, you could use the md5 xlat 
function then compare the value in your database.

  Olivier Beytrison
  Network & Security Engineer, HES-SO Fribourg
  Mail: olivier at

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