linux-kernel - Re: [RFC PATCH 4/4] X.509: Handle midnight alternative notation in GeneralizedTime

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Message-ID: <28958.1454516753@warthog.procyon.org.uk>
Date:	Wed, 03 Feb 2016 16:25:53 +0000
From:	David Howells <dhowells@...hat.com>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	dhowells@...hat.com, Rudolf Polzer <rpolzer@...gle.com>,
	keyrings@...r.kernel.org,
	David Woodhouse <David.Woodhouse@...el.com>,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	John Stultz <john.stultz@...aro.org>
Subject: Re: [RFC PATCH 4/4] X.509: Handle midnight alternative notation in GeneralizedTime

One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk> wrote:

> Pedantic hat on 24:00:01 is also potentially valid. The ANSI and ISO
> standards allow for double leap seconds even though CCIR-460 doesn't
> allow it to actually happen.

As far as I can tell without actually buying a copy of ISO 8601, that standard
only allows for a single leap second in a day.

I grant that that doesn't mean that other standards may permit multiple leap
seconds.

David