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Re: [TLS] Curve25519 in TLS and Additional Curves in TLS

Robert Ransom <rransom.8774@gmail.com> Thu, 23 January 2014 19:08 UTC

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Date: Thu, 23 Jan 2014 11:08:16 -0800
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From: Robert Ransom <rransom.8774@gmail.com>
To: Andy Lutomirski <luto@amacapital.net>
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Cc: Manuel Pégourié-Gonnard <mpg@polarssl.org>, tls@ietf.org
Subject: Re: [TLS] Curve25519 in TLS and Additional Curves in TLS
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On 1/23/14, Andy Lutomirski <luto@amacapital.net> wrote:

> Can someone remind me why any of the above is better than using
> ECPointFormat to specify the point format?

As far as I can tell from the spec, ECPointFormat is used only to tell
parties what point formats their communication partner can process,
not to describe the format of an actual point.  (That's why the point
formats referenced by RFC 4492 include a leading magic byte.)

ECPoint must be self-describing within the scope of a given curve.


Robert Ransom

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