On 26 September 2012 15:56, Paul Hoffman <[email protected]> wrote:
> On Sep 26, 2012, at 1:46 AM, Ben Laurie <[email protected]> wrote:
>
>> On 25 September 2012 23:32, Paul Hoffman <[email protected]> wrote:
>>> On Sep 25, 2012, at 12:06 PM, Dan York <[email protected]> wrote:
>>>
>>>> BUT... to Tony's last point, are we in fact making it *harder* for 
>>>> developers by overloading the TLSA RRtype with different types of content?
>>>
>>> No, because the types of content are identical.
>>
>> They are not, as I just pointed out in the other thread.
>
> Unless I missed it (certainly a possibility), what you pointed out was 
> different semantics for identical content. That is, where the RFC talks about 
> the trust anchor for the server, and chains sent by the server, we need to 
> change that to trust anchors used by, and chains sent by, the sending party. 
> No bits on the wire change, right?
>
>>>> Or is that adequately addressed by having the second left-most label in 
>>>> the domain name (ex. "_smimecert") be the way that a developer would know 
>>>> what is in the TLSA RR and therefore how it should be processed?
>>>
>>> That's not content, that's the request you used to get the content.
>>>
>>> As Ben pointed out earlier, we need to make a few changes saying "where 
>>> DANE talks about a chain sent by the server, this document is talking about 
>>> a chain sent by the other party". But the contents are the same.
>>
>> You could argue that all RRs merely contain bytes, so their contents
>> are "the same".
>
> No, you can't. The TLSA RR has particular fields with particular structure. 
> That structure is identical in SMIMEA.
>
>> If they mean different things, then they're not
>> _really_ the same.
>
> Nor do they need to be _really_ the same, just have the same format.
>
>> It could be that TLSA could be redrafted to fix this problem.
>
> It sounds like that a new RFC can update the TLSA draft. That's exactly what 
> we are proposing. :-)

I am more than happy for our different brands of pendantry to coexist
in this case :-)
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