Produce public key from private key

[Dennis4b]

I believe it would be helpful if there is a utility or command option to show the public key belonging to a private key, similar to the Wireguard option wg pubkey (apologies if this exists already and I missed it)

So for example:

> age-keygen
# created: 2022-06-13T14:21:21+02:00
# public key: age158ejr86nfq2m75s65w7tpc99y3ev259gzaj0csygtwlsxsdjsa2qele3tv
AGE-SECRET-KEY-1ASSGCQ2Q43JW29C333QL5YNT9ALU3E4A50DHDK0KDFX0PSTNUZ3QM7C7UJ

and then

> echo "AGE-SECRET-KEY-1ASSGCQ2Q43JW29C333QL5YNT9ALU3E4A50DHDK0KDFX0PSTNUZ3QM7C7UJ" | age-pubkey
age158ejr86nfq2m75s65w7tpc99y3ev259gzaj0csygtwlsxsdjsa2qele3tv

I have a patch which adds the age-pubkey command that I could submit as a PR, but the authors might prefer to do it via an age-keygen option - or have an entirely different opinion about this?

[FiloSottile]

You're looking for age-keygen -y :)

[Dennis4b]

Oh no... sorry I probably got distracted by the identity/recipients terminology.. age-keygen -y is perfect, thank you!