[Bug 1990520] Re: [Ubuntu 22.04] zkey: Fix re-enciphering of EP11 identity key of KMIP plugin

[Dan Bungert]

** Tags added: foundations-triage-discuss

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Title:
  [Ubuntu 22.04] zkey: Fix re-enciphering of EP11 identity key of KMIP
  plugin

Status in Ubuntu on IBM z Systems:
  New
Status in s390-tools package in Ubuntu:
  New
Status in s390-tools-signed package in Ubuntu:
  New

Bug description:
  Description:   
  zkey: Fix re-enciphering of EP11 identity key of KMIP plugin 

  Symptom:       
  When re-enciphering the identity key and/or wrapping key of the zkey KMIP plugin via 'zkey kms reencipher', the operation completes without an error, but the secure keys are left un-reenciphered. A subsequent connection attempt with the KMIP server will fail because the identity key is no longer valid.

  Problem:
  The re-enciphered secure key is not copied back into the key token buffer. Also, the the public key part, i.e. the MACed SubjectPublicKeyInfo (SPKI) structure must also be re-enciphered (i.e. re-MACed), since the MAC is calculated with the EP11 master key.

  Solution:      
  Copy the re-enciphered secure key back into the key token buffer, and also re-encipher the public key part.

  Reproduction:  Perform a master key change on the EP11 APQNs used with the
                 KMIP plugin.

  Problem-ID:    197605

  Upstream-ID:   4e2ebe0370d9fb036b7554d5ac5df4418dbe0397

  Preventive:    yes

  Date:          2022-04-08
  Author:        Ingo Franzki <ifranzki at linux.ibm.com>
  Component:     s390-tools

  == Comment: #1 - Ingo Franzki <ifranzki at de.ibm.com> - 2022-04-08 09:57:45 ==
  Upstream commit:
  https://github.com/ibm-s390-linux/s390-tools/commit/4e2ebe0370d9fb036b7554d5ac5df4418dbe0397

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