25 lines
632 B
C
25 lines
632 B
C
#ifndef RANDOM_H
|
|
#define RANDOM_H
|
|
|
|
#include "chacha.h"
|
|
#include "util.h"
|
|
|
|
#define RANDOM_CACHE_SIZE 256U
|
|
#define RANDOM_RESEED_SIZE (256U * 1024)
|
|
|
|
struct random_state {
|
|
unsigned index;
|
|
unsigned reseed;
|
|
chacha_ctx ctx;
|
|
u8 cache[RANDOM_CACHE_SIZE];
|
|
};
|
|
|
|
void random_state_init(struct random_state *state);
|
|
void get_random_bytes(struct random_state *state, void *buf, size_t size);
|
|
u16 get_random_u16(struct random_state *state);
|
|
u16 get_random_u16_uniform(struct random_state *state, u16 bound);
|
|
u64 get_random_u64(struct random_state *state);
|
|
u64 get_random_u64_uniform(struct random_state *state, u64 bound);
|
|
|
|
#endif
|