amcrypt: deprecated key derivation used

That's an old one, but as far as I see, not fixed yet:

I get problems with DLEs using amcrypt-ossl.

The message in amstatus contains "deprecated key derivation used".

This seems to point to something like this issue:

https://unix.stackexchange.com/questions/507131/openssl-1-1-1b-warning-using-iter-or-pbkdf2-would-be-better-while-decrypting

Ah, and we have an zmanda/amanda issue for more than two years here also:

https://github.com/zmanda/amanda/issues/112

I suggested this patch:

https://github.com/stefangweichinger/amanda/commit/9c79d55c906ecf822f5d31b2cea69b679fb93572

but what about restore?

dumps encrcpted with the old script should be decrypted with other 
options than newer ones.

Does anyone have an idea how to write an according script for that?