linux/drivers/net/wireguard/noise.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. All Rights Reserved.
 */
#ifndef _WG_NOISE_H
#define _WG_NOISE_H

#include "messages.h"
#include "peerlookup.h"

#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/atomic.h>
#include <linux/rwsem.h>
#include <linux/mutex.h>
#include <linux/kref.h>

struct noise_replay_counter { … };

struct noise_symmetric_key { … };

struct noise_keypair { … };

struct noise_keypairs { … };

struct noise_static_identity { … };

enum noise_handshake_state { … };

struct noise_handshake { … };

struct wg_device;

void wg_noise_init(void);
void wg_noise_handshake_init(struct noise_handshake *handshake,
			     struct noise_static_identity *static_identity,
			     const u8 peer_public_key[NOISE_PUBLIC_KEY_LEN],
			     const u8 peer_preshared_key[NOISE_SYMMETRIC_KEY_LEN],
			     struct wg_peer *peer);
void wg_noise_handshake_clear(struct noise_handshake *handshake);
static inline void wg_noise_reset_last_sent_handshake(atomic64_t *handshake_ns)
{ … }

void wg_noise_keypair_put(struct noise_keypair *keypair, bool unreference_now);
struct noise_keypair *wg_noise_keypair_get(struct noise_keypair *keypair);
void wg_noise_keypairs_clear(struct noise_keypairs *keypairs);
bool wg_noise_received_with_keypair(struct noise_keypairs *keypairs,
				    struct noise_keypair *received_keypair);
void wg_noise_expire_current_peer_keypairs(struct wg_peer *peer);

void wg_noise_set_static_identity_private_key(
	struct noise_static_identity *static_identity,
	const u8 private_key[NOISE_PUBLIC_KEY_LEN]);
void wg_noise_precompute_static_static(struct wg_peer *peer);

bool
wg_noise_handshake_create_initiation(struct message_handshake_initiation *dst,
				     struct noise_handshake *handshake);
struct wg_peer *
wg_noise_handshake_consume_initiation(struct message_handshake_initiation *src,
				      struct wg_device *wg);

bool wg_noise_handshake_create_response(struct message_handshake_response *dst,
					struct noise_handshake *handshake);
struct wg_peer *
wg_noise_handshake_consume_response(struct message_handshake_response *src,
				    struct wg_device *wg);

bool wg_noise_handshake_begin_session(struct noise_handshake *handshake,
				      struct noise_keypairs *keypairs);

#endif /* _WG_NOISE_H */