Mark Gibson wrote:
Hi,
I've been trying to Kerberize our Apache and PostgreSQL servers for
our company's web applications.
Goal: To connect from a PHP web app to a PostgreSQL database
using the users credentials, so all authorization is managed via
privileges within the database.
Our IT dept has recently installed Windows 2003 Server to provide
authentication & directories via Kerberos and LDAP.
I've managed to configure Apache (2.0.49) to authenticate users using
mod_auth_kerb (5.0-rc6), and also PostgreSQL (7.4.3) to use Kerberos.
(Linux hosts use MIT KerberosV5 1.3.3 client libs, KDC is Windows 2003)
mod_auth_kerb is configured with:
KrbSaveCredentials on
So in PHP (4.3.8) we end up with the variables:
$_SERVER['REMOTE_USER'] (eg: 'gibsonm@xxxxxxxxxxxxxxx')
$_SERVER['KRB5CCNAME'] (eg: 'FILE:/tmp/krb5cc_apache_tVFJCd')
Even HTTP Negotiate works with Firefox/Linux (but not IE/XP yet!) :)
But this is where I get stuck.
How do I use the supplied credentials file to connect to PostgreSQL?
In the PostgreSQL docs it says:
(http://www.postgresql.org/docs/7.4/interactive/auth-methods.html#KERBEROS-AUTH)
> If you use mod_auth_kerb from http://modauthkerb.sf.net and mod_perl
> on your Apache web server, you can use AuthType
> KerberosV5SaveCredentials with a mod_perl script. This gives secure
> database access over the web, no extra passwords required.
I'm assuming this is out of date, or has changed with mod_auth_kerb 5.0,
and that the KrbSaveCredentials directive does this job instead.
I'VE DONE IT! THE HOLY GRAIL OF WEB/DB APPS! :)
All it takes it this line your PHP script:
putenv("KRB5CCNAME={$_SERVER['KRB5CCNAME']}");
Then pg_connect works :)
--
Mark Gibson <gibsonm |AT| cromwell |DOT| co |DOT| uk>
Web Developer & Database Admin
Cromwell Tools Ltd.
Leicester, England.
