Messages

Btw. do you see the same thing happening that some  I do, that the XML is created in the future a few minutes?

It must be som kind of bug with date and time. The Nextcloud server and OPNsense firewall use ntp and it's no problem with the time.
When I pressed the button Setup/Test Nextcloud at 04.20 PM the filename of the backup was 04:07:40. My backup file was not created in the future but 13 minutes before my test.

Are you sure it's the correct password?
If I write an incorrect password I get the same error and without -base64 the output is "bad magic number
".

Well there is something off at least.  ;D I'm reaching the same point  that maskim & dudeman21 do.
The creation off that XML is done roughly 3 minutes in the future

Timezone: UTC+2 - CEST -  NL

command & output:
openssl enc -d -aes-256-cbc -in opnsense-enc.xml -out opnsense-dec.xml -pass pass:K6cMk-Kk7fY-KJCkg-5TrTD-FZdEG
bad magic number

mark

I had the same problem as you. If you add -base64 it works.
openssl enc -d -base64 -aes-256-cbc -in opnsense-enc.xml -out opnsense-dec.xml -pass pass:K6cMk-Kk7fY-KJCkg-5TrTD-FZdEG