feature request: Generate a minimal x.509 cert from public key

[robbiemu]

The basic use case for a keypair is to sign and verify. verification commonly works with the public key derived from a certificate (x.509). That means that this pblic key by itself cannot be used to sign and verify, for example, with jsrsasign

[BlackFrog1]

You don't use Public Key to sign. You use Public Key to encrypt data. And private key to sign.