struct cprng {
	uint32_t	state[16];
	unsigned	buffered;
};

#define	CPRNG_SEED_BYTES	32

void		cprng_seed(struct cprng *, const void *);
uint32_t	cprng32(struct cprng *);
uint64_t	cprng64(struct cprng *);
void		cprng(struct cprng *, void *, size_t);

void		cprng1(const void *, void *, size_t);