I'm trying to persist public/private keys to our database and having some
trouble:


Welcome to Racket v6.11.
> (require crypto crypto/gcrypt)
> (crypto-factories gcrypt-factory)
> (define key (generate-private-key 'rsa))
> key
(object:gcrypt-rsa-key% ...)
> (define pub (pk-key->public-only-key key))
> pub
(object:gcrypt-rsa-key% ...)
> (public-key=? key pub)
#t
> (public-key=? key (datum->pk-key (pk-key->datum key 'OneAsymmetricKey)
'OneAsymmetricKey))
#f
> (public-key=? key (datum->pk-key (pk-key->datum key 'RSAPrivateKey)
'RSAPrivateKey))
#f
> (public-key=? key (datum->pk-key (pk-key->datum key 'rkt-private)
'rkt-private))
#f

The docs state that GCrypt does not have the ability to recompute a public
key component form the data in a 'PrivateKeyInfo format, so that's no good.

pk-keys are objects, not structs, and there doesn't appear to be any way to
say "here's a private key and a public key, composite them".

This has to be a thing that people do, so what am I missing?

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