Re: [MMUSIC] WGLC on draft-ietf-mmusic-dtls-sdp-06.txt

Paul Kyzivat <pkyzivat@alum.mit.edu> Wed, 24 February 2016 22:50 UTC

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To: Christer Holmberg <christer.holmberg@ericsson.com>, Roman Shpount <roman@telurix.com>
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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Date: Wed, 24 Feb 2016 17:50:05 -0500
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Subject: Re: [MMUSIC] WGLC on draft-ietf-mmusic-dtls-sdp-06.txt
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On 2/24/16 4:58 PM, Christer Holmberg wrote:
> Hi,
>
> ...
>
>>>      Looking deeper, I find OLD TEXT (from 7345) that talks about
>>>      multiple fingerprints, for differing cipher suites. So I guess in
>>>      that case multiple certificates will also be presented, with a
>>>      fingerprint for each, and it is only necessary to verify one of them.
>>>
>>>      But the NEW TEXT removes all of this, changing it to refer to *this*
>>>      draft. But equivalent text isn't present in this draft!!!
>>>
>>>
>>> I was talking about using multiple fingerprints to offer multiple
>>> cipher suites. I am not sure what draft this is present in, but this
>>> is what EKR explained to me in on the list.
>>
>> As noted above, this text is in 7345. But the updates to 7345 that are present in dtls-sdp (section 9.3) *remove* that text!
>>
>>> Can you send the reference to this OLD TEXT you mentioned so that it
>>> can be added to this draft?
>>
>> Section 9.3 of dtls-sdp.
>
> Maybe I'm just tired, but I don't find it, so could you please copy the part of the old text in section 9.3 that talks about multiple fingerprints?
>
> The intention has not been to remove anything, only to move common parts from 7345 into draft-dtls-sdp.

Please see my reply to Martin.

Note that I am also getting confused now. There are two many documents 
that reference, override, and update one another. Bottom line is I can't 
find any explanation for multiple fingerprints or the hash agility that 
Martin is looking for.

I don't think I am competent to propose a fix for this.

	Thanks,
	Paul