In the specific case, there would be multiple hashes all under the same algorithm id, so the data structure would be pretty trivial... Maybe we just need the iana considerations for registering hash functions plus some text how to truncate.
Sent from mobile > On 28. Feb 2018, at 01:48, Jim Schaad <[email protected]> wrote: > > I need to re-publish my document with hash algorithms, however I am not sure > what needs to be placed in this structure in some ways. > > Is there something beyond > > MAC = [ > Digest : bstr, > Algorithm: alg_id > ] > > If you start trying to carry the content you end up with problems because it > is just as often pointed to. Not sure that putting the pointer in the digest > computation would make sense as this value often chances as well. > > Are you thinking of something specific that should be part of this? > > I am not sure just how strong the demand is for parametrized hash algorithms > is. I have used a couple in my lifetime, but always as cases to see what > would happen and have never used one in the wild. > > Jim > > >> -----Original Message----- >> From: COSE [mailto:[email protected]] On Behalf Of Carsten Bormann >> Sent: Monday, February 26, 2018 9:01 AM >> To: [email protected] >> Subject: [COSE] Digests (hashes) in COSE? >> >> I think that has come up before, but today in the SUIT WG Interim we briefly >> discussed a structure where it would be useful to contain multiple unkeyed >> digests (hashes) in one signed claim (*). In COSE, we have a registry for >> keyed MAC schemes, but not for hashes. We also don’t have a COSE_Digest >> structure (which would be quite simple, I believe) either (**). >> >> To avoid everyone defining their own way of describing hashes, should we >> be setting this up for COSE? >> We would have to be fast to be relevant for SUIT. >> >> Grüße, Carsten >> >> (*) https://tools.ietf.org/html/draft-moran-suit-manifest-01#section-4 >> (**) maybe a bit like CMS digestedData, but simpler of course >> >> _______________________________________________ >> COSE mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/cose > > >
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