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Re: [Curdle] I-D Action: draft-ietf-curdle-ssh-ed25519-01.txt

Eric Rescorla <ekr@rtfm.com> Fri, 18 August 2017 13:07 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Fri, 18 Aug 2017 06:06:41 -0700
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To: denis bider <denisbider.ietf@gmail.com>
Cc: "Mark D. Baushke" <mdb@juniper.net>, Daniel Migault <daniel.migault@ericsson.com>, curdle <curdle@ietf.org>, Loganaden Velvindron <logan@hackers.mu>
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Subject: Re: [Curdle] I-D Action: draft-ietf-curdle-ssh-ed25519-01.txt
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On Fri, Aug 11, 2017 at 9:56 AM, denis bider <denisbider.ietf@gmail.com>
wrote:

> I would also like to see it specified, but for a standards track document,
> the main obstacle I see is the need for 2 implementations.
>

AD here. Without taking a position on Ed448, there is no requirement for 2
implementations for Proposed Standard.

-Ekr


>
> I generally loathe to implement something before OpenSSH, because my
> installed base is maybe 1% of theirs, so even if I follow the spec, and
> they implement it later but make a deviation, chances are that (1) they
> won't care about compatibility with my implementation, (2) they will not
> test against my implementation, and (3) I will be adapting to their
> implementation, and not the other way around.
>
> For these reasons, I am hesitant to implement something OpenSSH has not
> yet implemented, but might implement in the future, until they have
> actually done so. If I go first, then what they do will override my effort
> if/when they implement it.
>
> denis
>
>
> On Fri, Aug 11, 2017 at 10:02 AM, Mark D. Baushke <mdb@juniper.net> wrote:
>
>> Hi Daniel & Loganaden,
>>
>> I see no reason not to specify ed448. The draft-ietf-curdle-ssh-curves-06
>> draft specifies both Curve25519 and Curve448 even though only Curve25519
>> has been implemented by OpenSSH.
>>
>>         -- Mark
>>
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