hardened_malloc/random.h

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