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softdevice_handlers: Use TRNG from Cracen #340

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softdevice_handlers: Use TRNG from Cracen #340

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1 change: 1 addition & 0 deletions doc/nrf-bm/release_notes/release_notes_changelog.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ SoftDevice Handler
==================

* Updated the system initialization to initialize on application level.
* Updated the entropy source to use the Cracen true random number generator instead of the Cracen pseudorandom number generator.

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======
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3 changes: 2 additions & 1 deletion subsys/softdevice_handler/nrf_sdh_soc.c
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Expand Up @@ -10,6 +10,7 @@
#include <nrf_sdh_soc.h>
#include <nrf_soc.h>
#include <psa/crypto.h>
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nit: we can get rid of this then?

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I don't think so, because the psa_status codes comes from this header.

#include <cracen_psa.h>
#include <zephyr/logging/log.h>

LOG_MODULE_DECLARE(nrf_sdh, CONFIG_NRF_SDH_LOG_LEVEL);
Expand Down Expand Up @@ -48,7 +49,7 @@ static void softdevice_rng_seed(void)
psa_status_t status;
uint8_t seed[SD_RAND_SEED_SIZE];

status = psa_generate_random(seed, sizeof(seed));
status = cracen_get_trng(seed, sizeof(seed));
if (status == PSA_SUCCESS) {
err = sd_rand_seed_set(seed);
memset(seed, 0, sizeof(seed));
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