From: Tom Lane <tgl@sss.pgh.pa.us>
To: Stephen Frost <sfrost@snowman.net>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: David Steele <david@pgmasters.net>
Cc: Joe Conway <mail@joeconway.com>
Cc: Magnus Hagander <magnus@hagander.net>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Nico Williams <nico@cryptonector.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: Robbie Harwood <rharwood@redhat.com>
Subject: Re: [PATCH v20] GSSAPI encryption support
Date: Thu, 04 Apr 2019 11:32:48 -0400
Message-ID: <8476.1554391968@sss.pgh.pa.us> (raw)
In-Reply-To: <20190404152439.GK6197@tamriel.snowman.net>
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<7b7035e0-3691-ca63-0957-25d17dc11514@2ndquadrant.com>
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<5406.1554388830@sss.pgh.pa.us>
<20190404144818.GI6197@tamriel.snowman.net>
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<7566.1554391003@sss.pgh.pa.us>
<20190404152439.GK6197@tamriel.snowman.net>
Stephen Frost <sfrost@snowman.net> writes:
> * Tom Lane (tgl@sss.pgh.pa.us) wrote:
>> There must be something about the x86_64 ABI that allows this to
>> accidentally work -- maybe integers are presumed to be sign-extended
>> to 64 bits by callee not caller? I added some logging and verified
>> that pgstat.c is seeing the correct string value, so it's working
>> somehow.
> Huh, I'm not sure. That's certainly interesting though.
Oh, no, it's simpler than that: the pointer values that
be_gssapi_get_princ() is returning just happen to be less than 2^31
on my system. I'd dismissed that as being unlikely, but it's the truth.
> So I'm a bit surprised that it's taking 4 minutes for you. I wonder if
> there might be an issue related to the KDC wanting to get some amount of
> random data and the system you're on isn't producing random bytes very
> fast..?
Not sure. This is my usual development box and it also does mail, DNS,
etc for my household, so I'd expect it to have plenty of entropy.
But it's running a pretty old kernel, and old Kerberos too, so maybe
the explanation is in there somewhere.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, sfrost@snowman.net, peter.eisentraut@2ndquadrant.com, alvherre@2ndquadrant.com, david@pgmasters.net, mail@joeconway.com, magnus@hagander.net, michael@paquier.xyz, nico@cryptonector.com, rharwood@redhat.com
Subject: Re: [PATCH v20] GSSAPI encryption support
In-Reply-To: <8476.1554391968@sss.pgh.pa.us>
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