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Re: [Anima] Errata 6642: Re: Registrar to MASA connections: SNI required

Michael Richardson <mcr+ietf@sandelman.ca> Wed, 31 January 2024 14:18 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Toerless Eckert <tte@cs.fau.de>, anima@ietf.org, Brian E Carpenter <brian.e.carpenter@gmail.com>, rwilton@cisco.com
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Date: Wed, 31 Jan 2024 09:18:33 -0500
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Subject: Re: [Anima] Errata 6642: Re: Registrar to MASA connections: SNI required
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Toerless Eckert <tte@cs.fau.de> wrote:
    > ~~~~ I think it should say:

    > Use of TLS 1.3 (or newer) is encouraged.  TLS 1.2 or newer is REQUIRED.
    > TLS 1.3 (or newer) SHOULD be available.  Registrars MUST and MASA
    > SHOULD support the "server_name" extension as specified in
    > [RFC6066]. This is also called the Server Name Indicator
    > (SNI).

The Registrar does not need to support SNI on it's BRSKI-EST connection.
In fact, it MUST ignore any SNI that it receives.  The pledge can never get
it correct, so we have to do port/IP address hosting only.

So I disagree with your text: it requires too much, and actually the wrong
thing for the Registrar.

    > Registrars MUST send a valid "server_name" extension when
    > connecting to a MASA.

Sure.



    > - The text "REQUIRED if not TLS 1.3" is confusing because TLS 1.3 does
    > actually require SNI support by the TLS stack. So the proposed text
    > could be read as contradicting TLS 1.3. Therefore suggested rewrite
    > does not mention TLS versions.

uhm. okay. I don't think that this is confusing.

--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide

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