This is a functioning Arduino implementation of Microchip's cryptoauthlib (v3.7.0).

If you are selling IoT devices and interested in making your stuff hackproof - the ATECC608B is a very cost effective solution for this (under $2 per board). Of course, integrating this chip with Arduino is a nightmare for most developers.

This solution works and can be used to figure out configuring the chip and then encrypting/decrypting with the chip. Not much else to say here except that when it runs in your instance of PlatformIO, just type in 'y' (without the parenthesis) to kick things off.