While these IANA points are minor, what is being considered here affects all 
TLS registries so please let us know what you think about the proposal for the 
following issue:


Issue:

The IANA DEs (Designated Experts) think that the registry should indicate that 
the connection_id  is DTLS-Only.  This is the first extension defined that 
would need this marking.  Currently, there is no “DTLS-Only” column in the TLS 
ExtensionType Values registry nor is there a "DTLS-OK" column like there are in 
the TLS Parameter registries [0].  Note none of the TLS extension registries 
[1] have a "DTLS-OK” column.


Proposals (there might be more):

0. Do nothing

1. Add a note to the top of the registry that says connection_id is DTLS-Only

2. Add a DTLS-Only column to the TLS ExtensionType Values registry and mark 
this one Y and all others N

3. Think about the future (inspired by Achiem in the GH repo):

- Change the “DTLS-OK” column to "TLS/DTLS”.  Allow values of TLS, DTLS, or 
TLS/DTLS.

- Mark all DTLS-OK=Y rows to “TLS/DTLS” and all DTLS-OK=N to “TLS”. [2]

- Add “TLS/DTLS” column to the TLS ExtensionType Values registry and mark the 
connection_id extension as “DTLS" and all others as “TLS/DTLS".


Selection:

While option 3 is the most work it does kind of future proof the registries and 
would make the columns the same in the parameter and extensions registry 
groupings.


spt

[0] https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml
[1] 
https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml
[2] Most of the DTLS-OK=N are deprecated cipher suites, but a couple of 
Exporter Labels are also marked as DTLS-OK=N.

> On Jun 20, 2019, at 21:46, Sean Turner <s...@sn3rd.com> wrote:
> 
> All,
> 
> During the DE’s review of the assignments for 
> draft-ietf-tls-dtls-connection-id, they requested a new “DTLS Only” column be 
> added to the TLS ExtensionType Values registry. This connection_id would be 
> the only “Y” and all others there now would be “N”.
> 
> The chairs also noted that the IANA considerations in 
> draft-ietf-tls-dtls-connection-id needs to specify values for all the columns 
> for connection_id in the TLS ExtensionType Values registry and tls12_cid in 
> the TLS ContentType registry.  Here are the proposed values:
> 
> connection_id
>       TLS 1.3 column: “-“ it is not applicable to TLS 1.3
>       Recommended: “Y"
> 
> tls12_cid
>       DTLS-OK: “Y”
> 
> This has been captured in the following PR:
> https://github.com/tlswg/dtls-conn-id/pull/67
> 
> Obviously, please comment.
> 
> spt

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