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Re: [INTERFACES] retrieving information about password from MS Access front-end

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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 inputpassword 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 ableto access pg_shadow which requires db admin permissions.
Regards.
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