void randpool_init(EntropyPool *pool, void *_data, size_t len);
size_t randpool_size(EntropyPool *pool);
void randpool_get(EntropyPool *pool, void *data, size_t n_byte);
void randpool_init(EntropyPool *pool, void *_data, size_t len);
size_t randpool_size(EntropyPool *pool);
void randpool_get(EntropyPool *pool, void *data, size_t n_byte);