Re: [TLS] [tls13-spec] relax certificate_list ordering requirements to match current practice (#169)

Ben Laurie <benl@google.com> Tue, 12 May 2015 12:37 UTC

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References: <tlswg/tls13-spec/pull/169@github.com> <tlswg/tls13-spec/pull/169/c101001652@github.com> <8425a2f40ddc46ac91aca136a955fc53@ustx2ex-dag1mb4.msg.corp.akamai.com> <91953cbbfb330a83faad8f7115a20a5a.squirrel@webmail.dreamhost.com>
Date: Tue, 12 May 2015 13:37:14 +0100
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From: Ben Laurie <benl@google.com>
To: ryan-ietftls@sleevi.com
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Subject: Re: [TLS] [tls13-spec] relax certificate_list ordering requirements to match current practice (#169)
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On 11 May 2015 at 19:41, Ryan Sleevi <ryan-ietftls@sleevi.com> wrote:
> So to be clear, I disagree with my colleague, Ben Laurie, rather
> substantially here.

To be fair, I mostly, or maybe even completely, agree with you on
further thought. I just wish that path validation were less
complicated!

I still have a concern around servers that are missing certificates
that are needed to complete validation at all, which the proposed
language change would permit.

I agree that the supplied certs have to cover multiple possible
validation paths, and hence cannot follow a strict "each cert
validates the next" ordering.

It would be nice, however, to put an end to the current chaos.