mbedtls_ctr_drbg_reseed() function
This function reseeds the CTR_DRBG context, that is extracts data from the entropy source.
Arguments
additional
Additional data to add to the state. Can be NULL.
len
The length of the additional data.
Return value
\c 0 on success. #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED on failure.