Is psa_generate_random() equivalent to HAL_RNG_GenerateRandomNumber()?

Thatseasy · ‎2024-11-20

STM32H573 with Secure Manager provisioned, the non-secure app cannot access the RNG anymore. Will it be ok to use Secure Manager API psa_generate_random() to replace HAL_RNG_GenerateRandomNumber()?

STea · ‎2024-11-21

Hello @Thatseasy ,

yes, you can use psa_generate_random() which calls mbedtls_psa_external_get_random(). this will result in a call from secure to the low_level_rng defined function RNG_GetBytes();

which is calling HAL_RNG_GenerateRandomNumber()

Regards

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STea · ‎2024-11-21

Hello @Thatseasy ,

yes, you can use psa_generate_random() which calls mbedtls_psa_external_get_random(). this will result in a call from secure to the low_level_rng defined function RNG_GetBytes();

which is calling HAL_RNG_GenerateRandomNumber()

Regards

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.