nrf_cc3xx_platform_hmac_drbg_set_pr()

int nrf_cc3xx_platform_hmac_drbg_set_pr	(	nrf_cc3xx_platform_hmac_drbg_context_t *const	context,
		bool	pr_enabled )

#include <crypto/nrf_cc310_platform/include/nrf_cc3xx_platform_hmac_drbg.h>

Function to enable prediction resistance.

Note

If the context is NULL the function uses an internal context.

If prediction resistance is enabled, TRNG is gathered at the beginning of every call to nrf_cc3xx_platform_hmac_drbg_get and nrf_cc3xx_platform_hmac_drbg_get_with_add. This leads to a higher power draw and longer execution time.

Note

Before calling this API the context to must be initialized by calling nrf_cc3xx_platform_hmac_drbg_init

The default configuration is to have prediction resistance turned off.

Parameters

[in,out]	context	Pointer to a structure holding the hmac_drbg context.
[in]	pr_enabled	Enables prediction resistance if true, otherwise false (default).

Returns

NRF_CC3XX_PLATFORM_SUCCESS on success, NRF_CC3XX_PLATFORM_ERROR_ENTROPY_NOT_INITIALIZED when entropy is not initialized