Hi Karen,

thanks for running this poll.

My problem with answering your questions is the following:

The question you are raising deals with how you want to handle extensions. While it is easy to say that all the features in specification X must be implemented it is not even clear which specifications you are actually referring to with question #1.

So, I am wondering how you plan to handle any extension when someone answers question #1 with YES. I see only the following ways:

a) there is an out-of-band agreement (for a specific system, such a federation) that defines what values need to be present, or

b) there is another higher layer specification that says what is required.

I assume that many of the OAuth folks have answered the question with YES since they are thinking that they will just write that specification as part of OpenID Connect.

If that's the plan I think it should be clearly articulated to avoid raising wrong expectations of the level of interoperability this work provides.

If there is a different plan then please let me know.

Ciao
Hannes


On 02/04/2013 04:48 PM, Karen O'Donoghue wrote:
Folks,

I am wrestling with how to help drive consensus on the topic of
criticality of headers. For background, please review the current
specification text, the minutes to the Atlanta meeting (IETF85), and the
mailing list (especially the discussion in December with (Subj: Whether
implementations must understand all JOSE header fields)). We need to
come to closure on this issue in order to progress the specifications.

As a tool to gather further information on determining a way forward,
the following polls have been created. Please respond before 11 February
2013.

Thanks,
Karen

*******************
FIRST POLL: Should all header fields be critical for implementations to
understand?

YES – All header fields must continue to be understood by
implementations or the input must be rejected.

NO – A means of listing that specific header fields may be safely
ignored should be defined.

********************
SECOND POLL: Should the result of the first poll be "YES", should text
like the following be added? “Implementation Note: The requirement to
understand all header fields is a requirement on the system as a whole –
not on any particular level of library software. For instance, a JOSE
library could process the headers that it understands and then leave the
processing of the rest of them up to the application. For those headers
that the JOSE library didn’t understand, the responsibility for
fulfilling the ‘MUST understand’ requirement for the remaining headers
would then fall to the application.”

YES – Add the text clarifying that the “MUST understand” requirement is
a requirement on the system as a whole – not specifically on JOSE
libraries.

NO – Don’t add the clarifying text.

************************
THIRD POLL: Should the result of the first poll be "NO", which syntax
would you prefer for designating the header fields that may be ignored
if not understood?

A – Define a header field that explicitly lists the fields that may be
safely ignored if not understood.

B – Introduce a second header, where implementations must understand all
fields in the first but they may ignore not-understood fields in the
second.

C - Other??? (Please specify in detail.)
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