Feature request: Output generated RSA keys as JSON Web Key

[cplussharp]

Is your feature request related to a problem? Please describe. the current output format "JSON" of the RSA key generation is no really useful and must always be transformed first

Describe the solution you'd like Output the keys as JSON Web Key, so they can be used directly by other applications

Describe alternatives you've considered transforming the PEM format to JWK

[cplussharp]

#1797 fixes this