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zkey: Reject re-enciphering of PVSECRET-AES keys

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Keys of type PVSECRET-AES can not be reenciphered using 'zkey reencipher'
or 'zkey-cryptsetup reencipher'. Reject that with a proper error message.

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Jorg Schmidbauer <jschmidb@de.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
This commit is contained in:
Ingo Franzki
2024-02-19 11:26:41 +01:00
committed by Steffen Eiden
parent 5276d408fd
commit a8eb2bd4e7
5 changed files with 38 additions and 6 deletions
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zkey/zkey-cryptsetup.1
+6 -2
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@@ -1,8 +1,8 @@
.\" Copyright IBM Corp. 2018
.\" Copyright IBM Corp. 2018, 2024
.\" s390-tools is free software; you can redistribute it and/or modify
.\" it under the terms of the MIT license. See LICENSE for details.
.\"
.TH ZKEY\-CRYPTSETUP 1 "May 2018" "s390-tools"
.TH ZKEY\-CRYPTSETUP 1 "February 2024" "s390-tools"
.SH NAME
zkey\-cryptsetup \- Manage secure AES volume keys of volumes encrypted with
\fBLUKS2\fP and the \fBpaes\fP cipher
@@ -115,6 +115,10 @@ command to re-encipher a secure AES volume key of a volume encrypted with
re-enciphered when the master key of the cryptographic adapter in CCA or EP11
coprocessor mode changes.
.PP
Volume keys of type \fBPVSECRET\-AES\fP can not be re-enciphered. These keys do
not use a cryptographic adapter, thus they do not need to be re-enciphered when
the master key of a cryptographic adapter changes.
.PP
The cryptographic adapter in CCA coprocessor mode has three different registers
to store master keys:
.RS 2