From: Tom Lane <tgl@sss.pgh.pa.us>
To: Greg Stark <stark@mit.edu>
Cc: Jacob Champion <pchampion@vmware.com>
Cc: sfrost@snowman.net <sfrost@snowman.net>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Proposal: Save user's original authenticated identity for logging
Date: Sun, 31 Jan 2021 10:53:26 -0500
Message-ID: <3085246.1612108406@sss.pgh.pa.us> (raw)
In-Reply-To: <CAM-w4HPaWxXZd7ZZ=DmLUDa-R_Dp=m7CbqFnH393zuY2uirWsQ@mail.gmail.com>
References: <c55788dd1773c521c862e8e0dddb367df51222be.camel@vmware.com>
<20210129220101.GE27507@tamriel.snowman.net>
<2829030.1611959442@sss.pgh.pa.us>
<c65fd6360d9a174dcf98b1e2e7d02ca654e0ca85.camel@vmware.com>
<2832058.1611963634@sss.pgh.pa.us>
<CAM-w4HPaWxXZd7ZZ=DmLUDa-R_Dp=m7CbqFnH393zuY2uirWsQ@mail.gmail.com>
Greg Stark <stark@mit.edu> writes:
> I wonder if there isn't room to handle this the other way around. To
> configure Postgres to not need a CREATE ROLE for every role but
> delegate the user management to the external authentication service.
> So Postgres would consider the actual role to be the one kerberos said
> it was even if that role didn't exist in pg_role. Presumably you would
> want to delegate to a corresponding authorization system as well so if
> the role was absent from pg_role (or more likely fit some pattern)
> Postgres would ignore pg_role and consult the authorization system
> configured like AD or whatever people use with Kerberos these days.
This doesn't sound particularly workable: how would you manage
inside-the-database permissions? Kerberos isn't going to know
what "view foo" is, let alone know whether you should be allowed
to read or write it. So ISTM there has to be a role to hold
those permissions. Certainly, you could allow multiple external
identities to share a role ... but that works today.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, stark@mit.edu, pchampion@vmware.com, sfrost@snowman.net
Subject: Re: Proposal: Save user's original authenticated identity for logging
In-Reply-To: <3085246.1612108406@sss.pgh.pa.us>
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