Need information on RPM signing

[srinivasan j v]

Hello All
I need to sign RPM using X509 Certificate and save the signatures
(signature file ) along with the RPM package .

       1. Is there any way  can i do that ?
       2. How can i save the these signature and any other certificates (X
509)  and  being not part of  CPIO archive ?

Thanks in advance

regards
srinivasan