mbedTLS and MPLABx IDE - PIC32MX MCU

Mbed TLS Platform specific questions
6

Hi @abomin3v3l

  1. The prototype of your callbacks is as you showed, but you can name them as you wish ( it is prefered for better readbality) .

If I’m correct, what should I use as input argument for “*ctx”? Is it “&ctr_drbg” or “&ssl”?

Neither, this is an opaque context for yout bio callbacks, that will have whatever data you need for your callbacks. For example, in the Mbed TLS example, it is a wrapper for the socket fd.

  1. If you have MBEDTLS_NO_PLATFORM_ENTROPY , since Mbed TLS doesn’t have a built-in entropy for your platform, for test purposes only you can try setting the unsewcure definition of MBEDTLS_TEST_NULL_ENTROPY. However, if your platform have some entropy source based on your radio-frequency, you can write a wrapper function, as defined in the article I referenced for adding a TRNG source, and as defined here by defining MBEDTLS_ENTROPY_HARDWARE_ALT

Regards