nrf_cc3xx_platform_hmac_drbg_reseed()

int nrf_cc3xx_platform_hmac_drbg_reseed	(	nrf_cc3xx_platform_hmac_drbg_context_t *const	context,
		const uint8_t *	additional,
		size_t	add_len )

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

Function to do a manual reseed of hmac_drbg (using TRNG)

Note

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

Calling this API is optional as the APIs nrf_cc3xx_platform_hmac_drbg_get and nrf_cc3xx_platform_hmac_drbg_get_with_add functions will reseed automatically according to the reseed interval in the built-in mbedtls_hmac_drbg context.

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

This API is only usable if nrf_cc3xx_platform initialization APIs was run prior to calling it.

This API is unneccesary if hmac_drbg is executed with prediction resistance turned on.

Parameters

[in,out]	context	Pointer to a structure holding the hmac_drbg context.
[in]	additional	Optional additional input to use for HMAC_DRBG_Reseed_function.
[in]	add_len	Length of the additional input in bytes, may be zero.

Returns

NRF_CC3XX_PLATFORM_SUCCESS on success, otherwise a non-zero failure according to the API mbedtls_hmac_drbg_reseed.