Re: [TLS] Updated EdDSA in TLS drafts

Ilari Liusvaara <ilari.liusvaara@elisanet.fi> Tue, 09 June 2015 09:59 UTC

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Date: Tue, 9 Jun 2015 12:59:09 +0300
From: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
To: Simon Josefsson <simon@josefsson.org>
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Subject: Re: [TLS] Updated EdDSA in TLS drafts
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On Tue, Jun 09, 2015 at 10:36:53AM +0200, Simon Josefsson wrote:
> I made the NamedCurve/ECPointFormat registrations stand on their own,
> please see updated draft here:
> 
> https://tools.ietf.org/html/draft-josefsson-tls-eddsa2-01
> 
> I'm hoping this version is a bit easier to read since everything it uses
> is defined in the document.
> 
> /Simon

Eeh...

"enum { ed25519(5) } NamedCurve;"

NamedCurve 5 is already assigned to some (too weak) elliptic curve.

The currently free named groups are 0x1D-0xFF and 0x0200-FDFF (don't
use other ones, those have special meaning, and 0xFExx is private use).


"When included in a ServerKeyExchange or ClientKeyExchange message,"

AFAIK, SKE or CKE never carry signature keys. The signature keys are
sent inside Certificate messages (usually as PKIX SubjectPublicKeyInfo,
but also OpenPGP format is defined).


-Ilari