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Date: Mon, 27 Jul 2020 12:32:58 -0500
From: Patrick Williams <patrick@stwcx.xyz>
To: Joseph Reynolds <jrey@linux.ibm.com>
Cc: openbmc <openbmc@lists.ozlabs.org>
Subject: Re: BMCWeb policy for HTTPS site identity certificate
Message-ID: <20200727173258.GQ3922@heinlein>
References: <d50417a7-3cc2-1674-b4d1-09283c4ddaf5@linux.ibm.com>
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On Thu, Jul 23, 2020 at 10:25:40AM -0500, Joseph Reynolds wrote:
> 2. certificate is good but expired or not yet valid - Use the=20
> certificate and log a warning.

I suspect that "not yet valid" is a more common case than might be
assumed on the surface.  I agree with the recommended action.

Many of the Facebook server designs do not have a hardware RTC available
to the BMC.  We have an RTC accessible by the BIOS and we also sync with
NTP.  That means there is always a period of time after we first plug in
the rack where the servers in the rack have a date that is way wrong.

It is reasonable to assume the date is just wrong and the certificate is
valid.  The clients can validate a certificate which is actually out of
date.

I'm less settled on using a certificate which is clearly expired, but it
is still likely better than using a newly-generated self-signed
certificate.

--=20
Patrick Williams

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