[SOLVED] dm-crypt "Cannot use serpent-xts-plain64 cipher for keyslot encryption." After migration to LUKS2

serafean · 02-14-2021, 02:08 PM

Hi,

I'm trying to migrate to luks2 header format, and on first try I got hit with

Quote:

Cannot use serpent-xts-plain64 cipher for keyslot encryption.

after running

Code:

cryptsetup convert

restoring the header worked fine, so no data loss. Any ideas?
cryptsetup version 2.3.4

The only reference I found on the net is here (askubuntu.com). But without answer...

Thanks.

serafean · 02-14-2021, 02:20 PM

So you know how one minute after posting the question you get an idea?

Well,

Code:

cryptsetup benchmark

was failing too. It turns out, because I'm using the kernel crypto backend, a required module was missing...

Code:

modprobe algif_skcipher

(after fixing the kernel install, of course), and off I went.