60 строки
1.6 KiB
C
60 строки
1.6 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _WG_COOKIE_H
|
||
|
|
#define _WG_COOKIE_H
|
||
|
|
|
||
|
|
#include "messages.h"
|
||
|
|
#include <linux/rwsem.h>
|
||
|
|
|
||
|
|
struct wg_peer;
|
||
|
|
|
||
|
|
struct cookie_checker {
|
||
|
|
u8 secret[NOISE_HASH_LEN];
|
||
|
|
u8 cookie_encryption_key[NOISE_SYMMETRIC_KEY_LEN];
|
||
|
|
u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN];
|
||
|
|
u64 secret_birthdate;
|
||
|
|
struct rw_semaphore secret_lock;
|
||
|
|
struct wg_device *device;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct cookie {
|
||
|
|
u64 birthdate;
|
||
|
|
bool is_valid;
|
||
|
|
u8 cookie[COOKIE_LEN];
|
||
|
|
bool have_sent_mac1;
|
||
|
|
u8 last_mac1_sent[COOKIE_LEN];
|
||
|
|
u8 cookie_decryption_key[NOISE_SYMMETRIC_KEY_LEN];
|
||
|
|
u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN];
|
||
|
|
struct rw_semaphore lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
enum cookie_mac_state {
|
||
|
|
INVALID_MAC,
|
||
|
|
VALID_MAC_BUT_NO_COOKIE,
|
||
|
|
VALID_MAC_WITH_COOKIE_BUT_RATELIMITED,
|
||
|
|
VALID_MAC_WITH_COOKIE
|
||
|
|
};
|
||
|
|
|
||
|
|
void wg_cookie_checker_init(struct cookie_checker *checker,
|
||
|
|
struct wg_device *wg);
|
||
|
|
void wg_cookie_checker_precompute_device_keys(struct cookie_checker *checker);
|
||
|
|
void wg_cookie_checker_precompute_peer_keys(struct wg_peer *peer);
|
||
|
|
void wg_cookie_init(struct cookie *cookie);
|
||
|
|
|
||
|
|
enum cookie_mac_state wg_cookie_validate_packet(struct cookie_checker *checker,
|
||
|
|
struct sk_buff *skb,
|
||
|
|
bool check_cookie);
|
||
|
|
void wg_cookie_add_mac_to_packet(void *message, size_t len,
|
||
|
|
struct wg_peer *peer);
|
||
|
|
|
||
|
|
void wg_cookie_message_create(struct message_handshake_cookie *src,
|
||
|
|
struct sk_buff *skb, __le32 index,
|
||
|
|
struct cookie_checker *checker);
|
||
|
|
void wg_cookie_message_consume(struct message_handshake_cookie *src,
|
||
|
|
struct wg_device *wg);
|
||
|
|
|
||
|
|
#endif /* _WG_COOKIE_H */
|