cracen_prng_value_from_pool()

int cracen_prng_value_from_pool

(

uint32_t *

prng_value

)

#include <subsys/nrf_security/src/drivers/cracen/common/include/cracen/prng_pool.h>

Get a secure random number from a pre-computed pool. Refill the pool before returning if necessary.

The secure random numbers are generated using the PSA PRNG driver.

Important note: Exposing sensitive data in the memory for long periods of time is not a good security policy. Thus we don't advise using this function for key generation or other security critical operations. We intend to use this function only to provide secure random numbers to the AES counter-measures mechanism. Even though the AES counter-measures are important to reduce the side-channel attack surface we classify them as less security critical than cryptographic keys. Thus we allow this pre-computed pool to be used to improve power consumption and execution time.

Parameters

[out]

prng_value

A secure random number from the PRNG pool

Return values

SX_OK	on success
SX_ERR_UNKNOWN_ERROR	or error