Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #ifndef _WG_COOKIE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #define _WG_COOKIE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include "messages.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct wg_peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct cookie_checker {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	u8 secret[NOISE_HASH_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	u8 cookie_encryption_key[NOISE_SYMMETRIC_KEY_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	u64 secret_birthdate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct rw_semaphore secret_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	struct wg_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct cookie {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	u64 birthdate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	bool is_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	u8 cookie[COOKIE_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	bool have_sent_mac1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	u8 last_mac1_sent[COOKIE_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	u8 cookie_decryption_key[NOISE_SYMMETRIC_KEY_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	struct rw_semaphore lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) enum cookie_mac_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	INVALID_MAC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	VALID_MAC_BUT_NO_COOKIE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	VALID_MAC_WITH_COOKIE_BUT_RATELIMITED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	VALID_MAC_WITH_COOKIE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void wg_cookie_checker_init(struct cookie_checker *checker,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			    struct wg_device *wg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) void wg_cookie_checker_precompute_device_keys(struct cookie_checker *checker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) void wg_cookie_checker_precompute_peer_keys(struct wg_peer *peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) void wg_cookie_init(struct cookie *cookie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) enum cookie_mac_state wg_cookie_validate_packet(struct cookie_checker *checker,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 						struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 						bool check_cookie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) void wg_cookie_add_mac_to_packet(void *message, size_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 				 struct wg_peer *peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) void wg_cookie_message_create(struct message_handshake_cookie *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			      struct sk_buff *skb, __le32 index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			      struct cookie_checker *checker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) void wg_cookie_message_consume(struct message_handshake_cookie *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			       struct wg_device *wg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #endif /* _WG_COOKIE_H */