Custom SASL authentication

[David Koski]

Hello,

I'm looking for a good way to apply a custom hash to passwords.  My hope 
is to add passwords to a (MySQL) database: INSERT INTO users 
(user='joblo', pass=MYHASH('plain-password')..

For SASL authentication, my thought first was to apply the same hash to 
the issued password and compare it with the hashed password in the 
database.  I soon discovered the sql driver supplied by Dovecot doesn't 
provide that ability, unless I'm missing something.

I'm looking for documentation on how to implement a custom 
authentication script if needed.

Regards,
David Koski
dkoski at sutinen.com