How to Make Digital Certificates in Radius

Hello All, Good Morning Im niel, Im making a radius server for a wireless LAN and with LDAP Support. LDAP is set-up already Radius Application is ready but 1 thing is lacking, it is how to create a Digital Certificate for Radius both Server Certificate and Client Certificate. Kindly help me on this problem, I appreciate any help that you can offer in order for me to implement such system. Thank you very much and more power to you all. Respectfully yours, Niel