ZFS GELI password check

I have the GELI key, but the associated pool (HDDs) unavailable currently (phisically).

Can I check my password(s) with the keyfile only, without the encrypted media?
If I know, the keyfile contains the keychain(s), protected by password(s). I would like to check this password, but without media.
This is possible?
(Use a FreeBSD CLI isn't problem.)
 
The keyfile is just a file with a bunch of random characters in it. You don't unlock the keyfile, the keyfile is part of the encryption key.
 
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