passwords hashed using pgcrypto (in the database)

Hi,

I'm learning SQLObject - checking if we could use it on our projects, 
and I got stuck at hashing passwords inside the database.

Imagine a simple table with info about users:

CREATE TABLE users (
     id       INT PRIMARY KEY,
     login    TEXT NOT NULL UNIQUE,
     pwdhash  TEXT NOT NULL
)

where "pwdhash" is a hashed password. We're using PostgreSQL and we 
usually handle this inside the database using a pgcrypto module, that 
provides various hash/crypto functions. An insert into the table then 
looks like this

     INSERT INTO users VALUES (1, 'login', crypt('mypassword', 
gen_salt('bf')))

which generates a salt, computes the hash and stores that into a single 
text column (salt+hash). The authentication then looks like this:

     SELECT id, login FROM users WHERE login = 'login' AND pwdhash = 
crypt('mypassword', pwdhash)

which reuses the salt stored in the column.

I'm investigating if we could do this with SQLObject, but it seems to 
me the answer is 'no'. I see it's possible to define magic attributes, 
but that's not enough as I need to rewrite the SQL (to add the calls to 
the crypt/gen_salt functions). I've done similar evaluations with 
SQLAlchemy and it supports 'hybrid values' and 'type decorators' to do 
this.

Is it possible to do something similar in SQLObject or do I have to 
move the functionality to the application level?

regards
Tomas

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