Re: [lamps] I-D Action: draft-ietf-lamps-cms-sha3-hash-01.txt

Daniel:

In CMS, there is no pre-defined customization lalle, so this structure works ell.  Also, the NIST specification says that the customization label is optional.

Russ

> On Mar 1, 2024, at 4:21 PM, Daniel Van Geest <daniel.vangeest.ietf@gmail.com> wrote:
> 
> Thanks Russ,
> 
> 	   When the id-kmac128 or id-kmac256 is used as part of an algorithm
> 
> 	   identifier, the parameters field MUST be absent if no
> customization	
> 	   label is used for S.  If any other value is used for S, then	
> 	   parameters field MUST be present and contain the value of S,
> encoded	
> 	   as Customization.
> 
> Maybe it doesn't matter because this has been specified by NIST and there's
> nothing to be done about it, but couldn't it be the case that the protocol
> specifies the customization label, and so it would be unnecessary to include
> the customization label in the parameters.  For example, cms-kyber could
> specify that the customization label is always "cms-kyber", in which case
> encoding this in the algorithm identifier is redundant.
> 
> Thanks,
> Daniel
> 
> 
> -----Original Message-----
> From: Spasm <spasm-bounces@ietf.org> On Behalf Of Russ Housley
> Sent: Friday, March 1, 2024 8:32 PM
> To: LAMPS <spasm@ietf.org>
> Subject: Re: [lamps] I-D Action: draft-ietf-lamps-cms-sha3-hash-01.txt
> 
> As requested, the OIDs for KMAC as a KDF have been added.
> 
> I am not aware of any remaining open issues.
> 
> Russ
> 
> 
>> On Mar 1, 2024, at 3:19 PM, internet-drafts@ietf.org wrote:
>> 
>> Internet-Draft draft-ietf-lamps-cms-sha3-hash-01.txt is now available. 
>> It is a work item of the Limited Additional Mechanisms for PKIX and 
>> SMIME (LAMPS) WG of the IETF.
>> 
>>  Title:   Use of the SHA3 One-way Hash Functions in the Cryptographic
> Message Syntax (CMS)
>>  Author:  Russ Housley
>>  Name:    draft-ietf-lamps-cms-sha3-hash-01.txt
>>  Pages:   20
>>  Dates:   2024-03-01
>> 
>> Abstract:
>> 
>>  This document describes the conventions for using the one-way hash
>>  functions in the SHA3 family with the Cryptographic Message Syntax
>>  (CMS).  The SHA3 family can be used as a message digest algorithm, as
>>  part of a signature algorithm, as part of a message authentication
>>  code, or part of a key derivation function.
>> 
>> The IETF datatracker status page for this Internet-Draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-lamps-cms-sha3-hash/
>> 
>> There is also an HTML version available at:
>> https://www.ietf.org/archive/id/draft-ietf-lamps-cms-sha3-hash-01.html
>> 
>> A diff from the previous version is available at:
>> https://author-tools.ietf.org/iddiff?url2=draft-ietf-lamps-cms-sha3-ha
>> sh-01
>> 
>> Internet-Drafts are also available by rsync at:
>> rsync.ietf.org::internet-drafts
> 
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