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Status Functionality already exists
Workspace IBM Z and LinuxONE Systems Hardware
Categories Crypto HW
Created by Guest
Created on Nov 30, 2023

RELATED IDEAS

Add the ability to generate an AES DUKPT DATA encryption key similar to the K1DATA derived key for DES DUKPT

This would allow the user to be able to perform encryption operations on DATA that has been encrypted using AES-DUKPT derived keys.

Idea priority Low
  • Guest
    Reply
    |     Apr 1, 2024
    .Client confirmed today that the function they were looking for is supported in the current releases. We may need to look at documentation to enhance clarity.
  • Guest
    Reply
    |     Dec 4, 2023
    Thank you for submitting the RFE. Let me ask some further questions, so that we can understand what is needed.

    I will start by saying that I think our AES-DUKPT coverage leaves a lot to be explained. CSNBUKD can actually make a wide variety of keys with AES-DUKPT. Reading the rule array descriptions, the table heading for generated_key_identifier3 says ?For A-DUKPT, only K3IPEK is allowed?. What is meant is that for generated_key_identifier3 use cases, only K3IPEK is allowed. The rule array section title of ?Output key selection for generated_key_identifier3 (One, optional)? is meant to convey that.

    You can make AES CIPHER keys in the generated_key_identifier1 slot by just passing in the correct derivation_data structure according to the table in Appendix K, ?AES-DUKPT derivation data?. Note the skeleton token in generated_key_identifier1 will be checked against the derivation_data to make sure there are not any conflicts.

    Does this help or clarify anything?

    Last point; I might be mis-interpreting the RFE. You may be asking for 64-byte AES token (what we call the ?04? or legacy AES token) support in CSNBUKD. This is not an enhancement that has been assigned much value, since we anticipated people wanting to make typed / compliant keys when they use AES DUKPT, not non-compliant / untyped keys. Is this what you were asking for?

    Please let me know your thoughts.

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