forked from intel/linux-intel-lts
-
Notifications
You must be signed in to change notification settings - Fork 0
/
cookie.h
59 lines (49 loc) · 1.61 KB
/
cookie.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. 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 */