I really need to find out the method which MT uses to encrypt passwords (mt_author table).

I'm developing a custom website which uses MT as a CMS. One of my forms needs to check if supplied username and password is really registered in MT. I've tried encrypting the inputted password with md5() and passwd() but these functions don't generate the same output.

Please give me a hint!

MT uses the crypt function and a salt to generate passwords. Look in lib/MT/Author.pm for the details and actual code used.