Spring Security Custom Authentication and Password Encoding

Question

Is there a tutorial out there or does anyone have pointers on how to do the following with Spring-Security?

Task:

I need to get the salt from my

Answer 1

I'll mark this as answered, as I solved my problem and no other comments or answers were given:

Edit 1 - Alternative 1 answers the original question

BUT I had to learn that customized password salting is a legacy approach that is not needed in Spring Security 3.1 any more, as I describe in

Edit 3 where I left some pointers on how to use the StandardPasswordEncoder for automated Salts that are stored with the password.