Re: [sidr] WGLC for draft-ietf-sidr-rpki-rtr-rfc6810-bis-03

[David Mandelberg <[e-mail]>]

On 2015-06-12 15:34, Rob Austein wrote:
> At Tue, 17 Mar 2015 00:46:23 -0400, David Mandelberg wrote:
>> The Router Key PDU (section 5.10) uses a fixed-size field for the 
>> SKI.
>> What's the plan for algorithm agility, if the size of the SKI 
>> changes?
>> if the size of the SKI does not change, but the algorithm does?
>
> I'm gonna weasel on this one and say
>
> a) A SKI is a SKI and it's none of this protocol's business how it's
>    calculated, so we don't care about algorithm changes per se here,
>    only about the length; and

Agreed.

>
> b) If and when the SKI length changes, we redesign the PDU and bump
>    the version number.
>
> The alternative would be to add a SKI-Length field or some such,
> either in the reserved ("zero") field just after the flags field, or
> just after the PDU length field.

If it wouldn't hold anything up too much, I'd prefer adding a 
SKI-Length field now. On the other hand, if adding that field would 
significantly delay this document, then I won't push it. It just seems 
strange to me that any future decision to change the length of the SKI 
will also require changing the the rpki-rtr version.

-- 
David Eric Mandelberg / dseomn
http://david.mandelberg.org/