Re: [TLS] Strawman on EdDSA/Ed25519 in TLS

Rob Stradling <rob.stradling@comodo.com> Fri, 29 May 2015 21:40 UTC

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Date: Fri, 29 May 2015 22:40:31 +0100
From: Rob Stradling <rob.stradling@comodo.com>
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To: Simon Josefsson <simon@josefsson.org>, Peter Bowen <pzbowen@gmail.com>
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Subject: Re: [TLS] Strawman on EdDSA/Ed25519 in TLS
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On 29/05/15 22:18, Simon Josefsson wrote:
> Peter Bowen <pzbowen@gmail.com>; writes:
>
>> On Wed, May 20, 2015 at 12:07 PM, Nico Williams <nico@cryptonector.com>; wrote:
>>> On Wed, May 20, 2015 at 07:14:47PM +0200, Simon Josefsson wrote:
>>>> Support for EdDSA/Ed25519 in TLS has been suggested a couple of times.
>>>
>>> I'm in favor.
>>>
>>>> One aspect I'm aware of is that there is no OID allocated nor
>>>> specification of PKIX certificates with EdDSA/Ed25519 public keys.  I'm
>>>> not sure the above document is the right place for doing that though,
>>>> and more thinking around this topic is especially appreciated.
>>>
>>> It's an OID.  You can get your own OID arc and then allocate an OID.
>>>
>>> Is it important to separate the addition of a PKIX algorithm OID from
>>> the TLS bits?  Well, it is neater that way.
>>
>> I'll donate a short OID to the cause if that will help move things
>> forward.  We have the 1.3.187 arc which is only three bytes DER.  If
>> someone has a smaller arc (third node would be 127 or lower) and would
>> offer an OID from their arc we can shave off another couple of bytes.
>
> Anyone?  I have 1.3.6.1.4.1.11591 but it is much longer.

CABForum has 2.23.140.  That's no shorter than Amazon's 1.3.187 OID though.

-- 
Rob Stradling
Senior Research & Development Scientist
COMODO - Creating Trust Online