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Re: BUG #5559: Full SSL verification fails when hostaddr provided

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Stephen Frost <sfrost(at)snowman(dot)net>, Magnus Hagander <magnus(at)hagander(dot)net>, Christopher Head <chris2k01(at)hotmail(dot)com>, pgsql-bugs <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: BUG #5559: Full SSL verification fails when hostaddr provided
Date: 2010-07-14 22:34:33
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs
Do the docs need any more updating?


Tom Lane wrote:
> Stephen Frost <sfrost(at)snowman(dot)net> writes:
> > Perhaps I was being a bit overzealous in my last response, sorry about
> > that.  If the point here is that people who are using hostaddr are in an
> > environment where DNS is non-functional or actively broken, then yes,
> > just bombing out would probably be fine.
> Well, if your environment includes broken DNS then you are clearly going
> to get nowhere anyway with Kerberos auth, no?  The point of hostaddr is
> *not* to try to avoid that problem.  Rather, it's to allow the
> application to shift the time expense of the forward DNS lookup to some
> other place than its PQconnect() call.  If you've got an app where the
> cost of PQconnect() is that critical, you're likely going to want to
> avoid Kerberos auth anyway, so I don't think it's all that important
> exactly how the two features play together.
> As the code stands in HEAD, I think everything is nicely
> self-consistent: host is what we believe the server name is for
> authentication purposes, and hostaddr is an optional pre-looked-up
> address corresponding to that.  There is nothing in this suggesting
> that we should be expected to try to generate an authentication name
> from hostaddr alone.  In particular, the fact that Kerberos is capable
> of trying to do that is at odds with the other three code paths where
> the server name is needed for authentication.  I don't feel any need
> to expose Kerberos' peculiarity here.
> 			regards, tom lane
> -- 
> Sent via pgsql-bugs mailing list (pgsql-bugs(at)postgresql(dot)org)
> To make changes to your subscription:

  Bruce Momjian  <bruce(at)momjian(dot)us>

  + None of us is going to be here forever. +

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Subject: Re: BUG #5559: Full SSL verification fails when hostaddr provided
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