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Re: [COSE] MAC with no recipient structures

Olaf Bergmann <bergmann@tzi.org> Thu, 19 November 2015 11:22 UTC

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From: Olaf Bergmann <bergmann@tzi.org>
To: Jim Schaad <ietf@augustcellars.com>
References: <04e901d119ad$3207bea0$96173be0$@augustcellars.com> <87egftszjh.fsf@aung.informatik.uni-bremen.de> <018301d11f16$31d46640$957d32c0$@augustcellars.com>
Date: Thu, 19 Nov 2015 12:22:48 +0100
In-Reply-To: <018301d11f16$31d46640$957d32c0$@augustcellars.com> (Jim Schaad's message of "Sat, 14 Nov 2015 11:53:54 -0800")
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Cc: cose@ietf.org
Subject: Re: [COSE] MAC with no recipient structures
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Hi Jim,

"Jim Schaad" <ietf@augustcellars.com> writes:

> I just read through the section referenced and did not see any reason
> for C and CAM to have access to the content.  I will try and read the
> entire document later today as that might describe the reasoning.

the reason comes from the way authorization is used. That would be a
long discussion more related to ACE than COSE.

> However, you are saying that it is ok for incorrect content to be in
> this message as far as C and CAM are concerned?

No, it would not. My draft assumes that this structure is passed within
the payload of an encrypt structure hop-by-hop.

Grüße
Olaf

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