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From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Jonathan S. Katz <jkatz@postgresql.org>
To: Jeff Davis <pgsql@j-davis.com>
To: Stephen Frost <sfrost@snowman.net>
To: Michael Paquier <michael@paquier.xyz>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Add "password_protocol" connection parameter to libpq
Date: Sun, 11 Aug 2019 21:56:50 +0200
Message-ID: <d57d3b74-be26-af08-956a-b095fd431a41@2ndquadrant.com> (raw)
In-Reply-To: <75dff08d-12cd-9e85-97ec-d7db55e224a7@postgresql.org>
References: <227015d8417f2b4fef03f8966dbfa5cbcc4f44da.camel@j-davis.com>
	<20190809030021.GG3194@paquier.xyz>
	<3bbf5968ea705700a2605d6db74d8510bea7940b.camel@j-davis.com>
	<20190809100922.GI3194@paquier.xyz>
	<20190809132850.GL16436@tamriel.snowman.net>
	<609482826475e0063c7d71b2449ae31c0d61b232.camel@j-davis.com>
	<071e45a6-97f7-1614-371c-98ecb03aed65@postgresql.org>
	<daf0017a1a5c2caabf88a4e00f66b4fcbdfeccad.camel@j-davis.com>
	<7a7a2f07-d013-eb80-85ba-9edaaf845038@2ndquadrant.com>
	<75dff08d-12cd-9e85-97ec-d7db55e224a7@postgresql.org>

On 2019-08-11 21:46, Jonathan S. Katz wrote:
> On 8/11/19 1:00 PM, Peter Eisentraut wrote:
>> On 2019-08-09 23:56, Jeff Davis wrote:
>>> 1. Hierarchical semantics, where you specify the least-secure
>>> acceptable method:
>>>
>>>   password_protocol = {any,md5,scram-sha-256,scram-sha-256-plus}
>>
>> What would the hierarchy be if scram-sha-512 and scram-sha-512-plus are
>> added?
> 
> password_protocol =
> {any,md5,scram-sha-256,scram-sha-512,scram-sha-256-plus,scram-sha-512-plus}?
> 
> I'd put one length of digest over another, but I'd still rank a method
> that uses channel binding has more protections than one that does not.

Sure, but the opposite opinion is also possible.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services





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