what hash does vBulletin's use for passwords?

[king98]

Hello,

I'm trying to integrate a php script with vBulletin's user. I tried to use this algorithem:
md5(md5($_POST['password']).$row['salt'])
to convert the password that is entered by the member to match the password that is stored in vBulletin.user table but that algorithem gave defferent hash from the one stored in the DB.

does any one guys know how to integrate the login process with a nonvBulletin script?