Hi Darren,
I add some additional comments from my new PM colleague Daniel:
For the Feedback Mode and Double-Pipeline Iteration Mode acc to SP800-108, additional input is needed.
The Feedback Mode expects an additional IV, which has to be specified explicitly.
In the Double-Pipeline Iteration Mode, the IV is defined as: Label || 0x00 || Context || [L]2. Although the input for the KDF is: A(i) {|| [i]2} || Label || 0x00 || Context || [L]2, we cannot just remove the first counter
from the CK_FKDF_DATA_PARAM (if present) to create the IV implicitly. Thus, the IV must be passed explicitly although this is cumbersome for the user since the IV needs to be concatenated manually.
Therefore, an IV field needs to be added to CK_FKDF_PARAMS (which can be NULL or is ignored for some KDFs).
Best regards,
Dieter
From: Dieter Bong
Sent: Dienstag, 28. März 2017 16:32
To: 'Darren Johnson' <>;
Subject: RE: [pkcs11] Groups - Flexible KDF Draft 1 uploaded
Hi Darren,
that’s an interesting proposal. I have included a few minor comments and questions in the document itself, please check the track changes
and comments. The most important question for me is: When passing (a pointer to) a CK_FKDF_COUNTER_PARAM structure, is C_Derive supposed to increment that counter after using for key derivation? Or is the application supposed to increment the counter after
C_Derive has returned? Please clarify.
Thanks,
Dieter
From:
[mailto:]
On Behalf Of Darren Johnson
Sent: Montag, 13. März 2017 02:58
To:
Subject: [pkcs11] Groups - Flexible KDF Draft 1 uploaded
Submitter's message
The Flexible KDF proposal draft 1 is uploaded and ready for initial review.
This proposal was originally written for use outside of this TC. As such, it is written in a format/style that is not consistent with the PKCS#11 standard.
-- Mr. Darren Johnson
Document Name:
Flexible KDF Draft 1
Description
A proposal for a new symmetric key derivation mechanism.
Download Latest Revision
Public Download Link
Submitter: Mr. Darren Johnson
Group: OASIS PKCS 11 TC
Folder: Documents
Date submitted: 2017-03-12 18:57:48
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