PKI/Certificate Authorities for Asterisk

Hello,

Is there any way that we can integreate a Certificate Authorities (CA) in Asterisk?
And do you know any API that we can use to create encryption features for Asterisk (like loading a certificate, verifying the signatures)… ?

All in all, I’m looking to implement PKI using Asterisk. I would be very grateful if some one can shed some light around this issue…

Thanks,
Fadil