53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
#ifndef __NOISE_H__
|
|
#define __NOISE_H__
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <noise/protocol.h>
|
|
|
|
#include "usart_helpers.h"
|
|
#include "rand_stm32.h"
|
|
|
|
|
|
#define CURVE25519_KEY_LEN 32
|
|
#define MAX_HOST_PACKET_SIZE 128
|
|
|
|
|
|
extern volatile uint8_t host_packet_buf[MAX_HOST_PACKET_SIZE];
|
|
extern volatile int host_packet_length;
|
|
|
|
enum handshake_state {
|
|
HANDSHAKE_UNINITIALIZED,
|
|
HANDSHAKE_NOT_STARTED,
|
|
HANDSHAKE_IN_PROGRESS,
|
|
HANDSHAKE_DONE_UNKNOWN_HOST,
|
|
HANDSHAKE_DONE_KNOWN_HOST,
|
|
};
|
|
|
|
extern volatile enum handshake_state handshake_state;
|
|
|
|
struct NoiseState {
|
|
NoiseHandshakeState *handshake;
|
|
enum handshake_state handshake_state;
|
|
NoiseCipherState *tx_cipher, *rx_cipher;
|
|
uint8_t *local_key;
|
|
uint8_t remote_key[CURVE25519_KEY_LEN];
|
|
uint8_t *remote_key_reference;
|
|
uint8_t handshake_hash[BLAKE2S_HASH_SIZE];
|
|
int failed_handshakes;
|
|
};
|
|
|
|
|
|
void uninit_handshake(struct NoiseState *st, enum handshake_state new_state);
|
|
void noise_state_init(struct NoiseState *st, uint8_t *remote_key_reference, uint8_t *local_key);
|
|
void persist_remote_key(struct NoiseState *st);
|
|
int start_protocol_handshake(struct NoiseState *st);
|
|
int reset_protocol_handshake(struct NoiseState *st);
|
|
int generate_identity_key(struct NoiseState *st);
|
|
int try_continue_noise_handshake(struct NoiseState * const st, uint8_t *buf, size_t len);
|
|
int send_encrypted_message(struct NoiseState *st, uint8_t *msg, size_t len);
|
|
|
|
void arm_key_scrubber(void);
|
|
void disarm_key_scrubber(void);
|
|
|
|
#endif
|