I am currently trying to establish pre shared key based tls handshake using mbedtls. However, I want to store the pre shared key in the trustzone and derive the session key inside the trustzone. Is it possible using mbedtls? Can I provide alternate implementation for psk based tls in mbedtls library?

It would be really helpful if this could be answered as soon as possible. Thank you in advance for your assistance.

Regards, 

Mayuri Janawad