Oberon Security Drivers for nRF54L15

[grantrudd]

Hello,

Does the nrf_oberon library support the nRF54L series parts? In the technical documentation, it appears that M33 parts are supported:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/security/nrf_security/doc/drivers.html#nrf-oberon-driver

I am able to build my code (SDK/Toolchain version 2.9.0) for nRF52840 successfully using the nrf_oberon libraries, but the build fails for nRF54L15 targets with this error:

fatal error: ocrypto_aes_eax.h: No such file or directory
2 | #include <ocrypto_aes_eax.h>

If nrf_oberon does support the full range of M33 parts, are there any additional KConfigs necessary for the L15?

Thanks!

[SwRa]

Hi Grant,

On nRf54L series, we are using CRACEN and the usage of nrf_oberon is not recommended. See here:https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/nrf54l/cryptography.html# and  https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/security/nrf_security/doc/drivers.html#cracen_driver 

We generally recommend the PSA Crypto API for cryptographic operations.

Regards,

Swathy

[grantrudd]

Does this mean that the nrf_oberon libraries can't be used on the nRF54L15?

Our application uses an encryption method not supported directly by the PSA API (it is supported by Oberon). Using the PSA API to implement our encryption scheme results in much slower performance with both the Oberon (nRF52840) and CRACEN (nRF54L15) backends. Directly using the Oberon implementation is roughly 3 times faster from our experiments on the nRF52840.

Is there a KConfig combination to allow compilation of the nrf_oberon libraries for the nRF54L15?