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

From: David Howells
Date: Wed Feb 03 2016 - 11:28:49 EST


One Thousand Gnomes <gnomes@xxxxxxxxxxxxxxxxxxx> wrote:

> > > As for 24:xx:yy times - I'm split about this. This code doesn't
> > > require a bijective decoding anyway (and if it did, 24:00:00 and
> > > 00:00:00 mapping to the same time64_t would be problem enough) so this
> > > is sure safe. On the other hand, a cert with a 24:xx:yy time that's
> > > not 24:00:00 probably should be regarded as invalid and not trusted
> > > for that reason alone.
> >
> > Feel free to argue that one with Linus:-/
>
> 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.

Did you mean 24:00:01 or 23:59:61?

David