How do I use the device root key to encrypt and decrypt?
I can set the device root key in the cryptocell register, but not sure how to use it. I am using Zephyr by the way.
I saw a function mbedtls_internal_aes_decrypt, that I was hoping used the device root key because it doesn't seem to take a key as an argument, and the documentation doesn't say you need to set a key before calling it. But I tried it and and it fails to start. Stepping though the assembly, I see that a check of the value at offset 0x38 from the start of the aes context is failing. not sure what the value is, but it is not being set by the context init, so I must have to use another function before I call the crypt fxn after I call the init fxn.
