int entropy, size_t min_len, size_t max_len);
void rand_drbg_cleanup_entropy(RAND_DRBG *drbg,
unsigned char *out, size_t outlen);
+size_t rand_drbg_get_additional_data(unsigned char **pout, size_t max_len);
/* DRBG helpers */
int rand_drbg_restart(RAND_DRBG *drbg,