Optiga Hash functionality

[Andrea]

Hi,

looking at the ifx_optiga_custom_example in the nRF5_SDK_15.3.0, i see that for the Hashing calculation the oberon backend is used instead the optiga backend, Why? Is there some limitation in the Hash capability of the Optiga chip?

Thanks

[Øyvind]

Hello, 

Is there some limitation in the Hash capability of the Optiga chip?

From the Optiga Backend documentation, you can see that HASH is not supported. The Nordic documentation for Infineon OPTIGA Trust X Software Framework states: 

While the backend API implementation is Nordic-specific, the native API is portable and also available on other host platforms. Furthermore, the native API exposes the complete function set of Trust X, such as reading and writing data objects, which is required for personalization.

This should allow you to access the full capability of the OptigaX Chip.

For crypto applications, Nordic offers the nRF52840 which offers ARM TrustZone CryptoCell 310, while the OptigaX can supplement with i.e. secure key storage.

Kind regards,
Øyvind