blob: e264e354d1c798096377fc5c33aac2715abe4e4b (
plain)
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
|
/* Copyright (C) 2015-2017 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 wireguard_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 wireguard_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 cookie_checker_init(struct cookie_checker *checker, struct wireguard_device *wg);
void cookie_checker_precompute_device_keys(struct cookie_checker *checker);
void cookie_checker_precompute_peer_keys(struct wireguard_peer *peer);
void cookie_init(struct cookie *cookie);
enum cookie_mac_state cookie_validate_packet(struct cookie_checker *checker, struct sk_buff *skb, bool check_cookie);
void cookie_add_mac_to_packet(void *message, size_t len, struct wireguard_peer *peer);
void cookie_message_create(struct message_handshake_cookie *src, struct sk_buff *skb, __le32 index, struct cookie_checker *checker);
void cookie_message_consume(struct message_handshake_cookie *src, struct wireguard_device *wg);
#endif /* _WG_COOKIE_H */
|
