Openssl keys and isakmpd

[AMozhar_(_at_)_SPIRIT21_(_dot_)_de]

Could someboby tell me please, if this command produces two keys(one
private and one public) or just one private?

openssl genrsa -out mykey.pem -rand Randomdata 1024

If it produces two keys, how can I find (get) the public one for putting it
into isakmpd/pubkeys -directory? ISAKMPD needs to see my public key! Does't
it?

Thank you very much

Aleksei