I would like to create an RSA key pair and an X509 cert and store both
of them in a JCA/JCE Key Store in Java2 SDK 1_4_2. I intend to use
them in another program to sign and encrypt xml documents.

I have figured out how to generate the RSA key pair using the
java.security package but I can't see any way to use it to create the
X509 cert.

Optionally, I can create the key pair and cert using openssl. Then I
can see how to import the cert from a file but not how to import the
RSA key pair from a file.

Sort of a catch22 here. I must be missing something very basic. Can
someone give me some guidance or point me to the correct place in any
documentation.

Thanks,
Paul