firstly to say, i've been working with perl(my first programming language) few days, and yeah I know there are probably tons of better solutions then this one, however that's what i'm capable of now... secondly this script is to solve javascript challange from one website. and lastely i've left it for a while, but yeah it would take years, so stopped it and started to go through the source script again, and I don't know if i'm right but the value of the checksum should rely just on the length of the password and last two characters, is that right ?