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Re: [DNSOP] I-D Action: draft-ietf-dnsop-maintain-ds-04.txt

Ólafur Guðmundsson <olafur@cloudflare.com> Tue, 10 January 2017 21:01 UTC

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From: Ólafur Guðmundsson <olafur@cloudflare.com>
Date: Tue, 10 Jan 2017 16:01:13 -0500
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To: Paul Wouters <paul@nohats.ca>
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Cc: Matthijs Mekking <matthijs@pletterpet.nl>, dnsop <dnsop@ietf.org>
Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-maintain-ds-04.txt
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Yes I agree,
Push a new version if Tim agrees ?

Olafur



On Tue, Jan 10, 2017 at 12:53 PM, Paul Wouters <paul@nohats.ca> wrote:

> On Tue, 10 Jan 2017, Matthijs Mekking wrote:
>
> I personally think the simplification of using all zero's is good. If
>>> someone accidentally changes the wrong number in the DS record when
>>> changing parameters, it will prevent a mistaken delete request. While,
>>> the zone might still fail, at least it won't be forced to go through a
>>> period of insecure while the parental DS gets repopulated.
>>>
>>
>> I am fine with using all zero's. I just don't think the change in
>> resource record format is a good idea, dropping the last RDATA field
>> from the CDS record.
>>
>
> Ohh, I think Matthijs actually found a bug:
>
> The CDS RDATA is identical to the DS RDATA format, which is
> according to RFC 4034:
>
>                         1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
>     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>    |           Key Tag             |  Algorithm    |  Digest Type  |
>    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>    /                                                               /
>    /                            Digest                             /
>    /                                                               /
>    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>
> The draft states:
>
>         The keying material payload is represented by a single 0.
>
> So the CDS delete entry currently specified as:
>
>    CDS 0 0 0
>
> Should in fact be:
>
>    CDS 0 0 0 0
>
>
> And similarly, the CDNSKEY is currently specified as:
>
>    CDNSKEY 0 3 0
>
> and should be:
>
>    CDNSKEY 0 3 0 0
>
>
> Olafur, do you agree? Should we push a new draft version with this fix?
>
>
> Paul
>
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