Re: [TLS] [Editorial Errata Reported] RFC8446 (6127)
Peter Wu <peter@lekensteyn.nl> Fri, 01 May 2020 11:00 UTC
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Date: Fri, 01 May 2020 12:59:58 +0200
From: Peter Wu <peter@lekensteyn.nl>
To: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: ekr@rtfm.com, rdd@cert.org, kaduk@mit.edu, caw@heapingbits.net, joe@salowey.net, sean+ietf@sn3rd.com, research@bensmyth.com, tls@ietf.org
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Subject: Re: [TLS] [Editorial Errata Reported] RFC8446 (6127)
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The current section describes what a client should do when it faces a
HRR, and the referenced bullet point specifies how the HRR "key_share"
extension should be processed.
The errata suggests "clarifying" that point by adding:
> Note: A "key_share" extension may not be supplied in a
> HelloRetryRequest message when a server receives an "early_data"
> (Section 4.2.10).
I interpret it as:
If the client sends an "early_data" extension in its Client Hello,
then the server responding with a HelloRetryRequest MAY include or
omit the "key_share" extension in the HRR.
That is not a result that is unique to the presence of the "early_data".
Perhaps you misinterpreted the second bullet point in
https://tools.ietf.org/html/rfc8446#page-54
This report does not fix an error, and it adds only more confusion. I
suggest rejecting it.
Kind regards,
Peter
On Fri, Apr 24, 2020 at 02:49:54AM -0700, RFC Errata System wrote:
> The following errata report has been submitted for RFC8446,
> "The Transport Layer Security (TLS) Protocol Version 1.3".
>
> --------------------------------------
> You may review the report below and at:
> https://www.rfc-editor.org/errata/eid6127
>
> --------------------------------------
> Type: Editorial
> Reported by: Ben Smyth <research@bensmyth.com>
>
> Section: 4.1.2.
>
> Original Text
> -------------
> If a "key_share" extension was supplied in the HelloRetryRequest,
> replacing the list of shares with a list containing a single
> KeyShareEntry from the indicated group.
>
> Corrected Text
> --------------
> If a "key_share" extension was supplied in the HelloRetryRequest,
> replacing the list of shares with a list containing a single
> KeyShareEntry from the indicated group. Note: A "key_share"
> extension may not be supplied in a HelloRetryRequest message
> when a server receives an "early_data" (Section 4.2.10).
>
> Notes
> -----
>
>
> Instructions:
> -------------
> This erratum is currently posted as "Reported". If necessary, please
> use "Reply All" to discuss whether it should be verified or
> rejected. When a decision is reached, the verifying party
> can log in to change the status and edit the report, if necessary.
>
> --------------------------------------
> RFC8446 (draft-ietf-tls-tls13-28)
> --------------------------------------
> Title : The Transport Layer Security (TLS) Protocol Version 1.3
> Publication Date : August 2018
> Author(s) : E. Rescorla
> Category : PROPOSED STANDARD
> Source : Transport Layer Security
> Area : Security
> Stream : IETF
> Verifying Party : IESG
>
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- [TLS] [Editorial Errata Reported] RFC8446 (6127) RFC Errata System
- Re: [TLS] [Editorial Errata Reported] RFC8446 (61… Peter Wu