Re: [TLS] Status of Cha-Cha/Poly Cipher Suites?

Watson Ladd <watsonbladd@gmail.com> Mon, 18 May 2015 16:52 UTC

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Date: Mon, 18 May 2015 09:52:55 -0700
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From: Watson Ladd <watsonbladd@gmail.com>
To: Sean Turner <turners@ieca.com>
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Subject: Re: [TLS] Status of Cha-Cha/Poly Cipher Suites?
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On Mon, May 18, 2015 at 7:29 AM, Sean Turner <turners@ieca.com> wrote:
> On May 18, 2015, at 06:36, Yoav Nir <ynir.ietf@gmail.com> wrote:
>
>>
>>> On May 18, 2015, at 11:19 AM, Nikos Mavrogiannopoulos <nmav@redhat.com>
wrote:
>>>
>>> On Sun, 2015-05-17 at 08:42 +0300, Ilari Liusvaara wrote:
>>>> On Sun, May 17, 2015 at 01:02:23AM +0300, Yoav Nir wrote:
>>>>> Hi, Jeffrey
>>>>> What remains for the TLS working group to do is to adopt a draft for
>>>>> ChaCha20-Poly1305 in TLS. There already is a candidate:
>>>>> https://tools.ietf.org/html/draft-mavrogiannopoulos-chacha-tls-05
>>>>
>>>> The only comment I have regarding that draft is that it doesn't specify
>>>> what to stick to record payload. Ciphertext (|P| bytes) || Tag (16
bytes),
>>>> right?
>>>
>>> Hi,
>>> I believed that the output format was explicit in rfc7539, but I was
>>> wrong. I've clarified that point and hopefully that will be included in
>>> the next draft update.
>>>
>>>>> Once that’s done, the document can both progress and if needed, people
>>>>> can request early assignment of identifiers. The ciphersuite registry
>>>>> has a “specification required” policy. Strictly speaking, the private
>>>>> draft could be enough - we don’t have to have an RFC, but practically
>>>>> speaking, this document will only get assignment after it is adopted
>>>>> by the WG.
>>>> As note, GnuTLS 3.4.x implements (disabled by default) the
abovementioned
>>>> draft, using CSID CCA0-CCA7 (which are noted in the draft).
>>>
>>> Indeed, we've added new code points to allow interoperability testing.
>>
>> So what’s stopping the chairs from polling the group for adoption?
>>
>> Chairs?
>>
>> Yoav
>
> Let’s just say it’s coming in the not to distant future.

To quote John von Neumann: "If you say why not tomorrow, I say why not
today? If you say today at 5 o'clock, I say why not one o'clock?"

>
> spt
>
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