From: Tino Wildenhain <tino@wildenhain.de>
To: Ranieri Mazili <ranieri.oliveira@terra.com.br>
Cc: pgsql-general@postgresql.org
Cc: pgsql-sql@postgresql.org
Subject: Re: Encrypted column
Date: Tue, 05 Jun 2007 09:51:59 +0200
Message-ID: <4665161F.9090009@wildenhain.de> (raw)
In-Reply-To: <46645B01.6070605@terra.com.br>
References: <46645B01.6070605@terra.com.br>
Ranieri Mazili schrieb:
> Hello,
>
> I need to store users and passwords on a table and I want to store it
> encrypted, but I don't found documentation about it, how can I create a
> table with columns "user" and "password" with column "password"
> encrypted and how can I check if "user" and "password" are correct using
> a sql query ?
Passwords are usually not encrypted but hashed instead. A common hash
function is available in postgres w/o any additional extension:
md5()
The rule is, if two hashes compare equal, then the original data must
be equal (yes, there are chances for collisions, but practically very
low. See also sha1 and friends in the pgcrypto contrib module)
Regards
Tino
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To: pgsql-sql@postgresql.org
Cc: tino@wildenhain.de, ranieri.oliveira@terra.com.br, pgsql-general@postgresql.org
Subject: Re: Encrypted column
In-Reply-To: <4665161F.9090009@wildenhain.de>
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