On Tue, Oct 24, 2023 at 4:46 AM Ilari Liusvaara <[email protected]>
wrote:

> On Tue, Oct 24, 2023 at 07:19:59AM +0200, [email protected] wrote:
> > Hi all,
> >
> > Les and I have put together a draft that starts to capture guidance
> > for JOSE (and COSE) following the recent list discussion about key
> > ids (see
> https://mailarchive.ietf.org/arch/msg/jose/Ziu1dqu9p19U-n1bhR4A5yof5ec/).
> >
> > Here is the link to the draft:
> >
> > https://datatracker.ietf.org/doc/draft-tschofenig-jose-cose-guidance/
>
> One topic I would like to see covered is API design guidance for
> libraries.
>
> For example, offer separate functions for verifying signatures and
> MACs, both rejecting anything that is not of correct type (implying
> that both reject alg=none). Mixing algorithms with different properties
> is very dangerous for security.
>
> Or that normal decryption functions need to insta-reject CBC and CTR
> algorithms.
>
>
> Another topic is how to use 'jwk' header. I have seen correct and
> incorrect uses of similar headers.
>
> And another is why Direct Encryption REALLY SHOULD NOT be used.
>

Can you say more about why? This is one I don't recall having seen much
discussion/criticism about.




> And there are plenty of other landmines to mark...
>
>
>
>
> -Ilari
>
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>

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