Thanks.
----- Original Message -----
From: "Volkan YAZICI" <volkan.yazici@xxxxxxxxx>
To: "Zlatko Matić" <zlatko.matic1@xxxxxxxxxxx>
Cc: <pgsql-general@xxxxxxxxxxxxxx>; <pgsql-interfaces@xxxxxxxxxxxxxx>
Sent: Monday, June 13, 2005 8:47 AM
Subject: Re: [INTERFACES] retrieving information about password
from MS Access front-end
Hi,
On 6/13/05, Zlatko Matić <zlatko.matic1@xxxxxxxxxxx> wrote:
I want to create VBA procedure that compares value in text box with
actual
password to determine if it is the same. As the password is encrypted
(md5)
I can't read it from pg_shaddow system table. How to retrieve decrypted
value from pg_shaddow?
It's (practically) impossible to decrypt a MD5 hashed password.
Or at least, how to transfer value from text-box (MS Access) to Postgres
so that Postgres can determine whether those two values
are the same ?
You need to MD5 hash the input passsword and compare hashed input
password with the one in pg_shadow. For instance:
-- $1 for password input.
SELECT usernm FROM recs WHERE passwd = md5($1)
Furthermore, it'll bring some potential security problems to be able
to access pg_shadow which requires db admin permissions.
Regards.
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