Is your feature request related to a problem? Please describe.

As of right now, it seems certificates have no validation. This means you can add 0 byte certificates, then use them the zsock_socket() etc. functions and you only get an error when calling the recvfrom function, which starts at -22 and then goes to -12 after a few times

Describe the solution you'd like

it would be a nice to have some level of certificate validation in functions in functions used earlier

Describe alternatives you've considered

No response