2 * Copyright (c) 2020 Doc.ai and/or its affiliates.
3 * Copyright (c) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>.
4 * Copyright (c) 2019-2020 Matt Dunwoodie <ncon@noconroy.net>.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #ifndef __included_wg_cookie_h__
19 #define __included_wg_cookie_h__
21 #include <vnet/ip/ip4_packet.h>
22 #include <wireguard/wireguard_noise.h>
27 VALID_MAC_BUT_NO_COOKIE,
31 #define COOKIE_MAC_SIZE 16
32 #define COOKIE_KEY_SIZE 32
33 #define COOKIE_NONCE_SIZE 24
34 #define COOKIE_COOKIE_SIZE 16
35 #define COOKIE_SECRET_SIZE 32
36 #define COOKIE_INPUT_SIZE 32
37 #define COOKIE_ENCRYPTED_SIZE (COOKIE_COOKIE_SIZE + COOKIE_MAC_SIZE)
39 #define COOKIE_MAC1_KEY_LABEL "mac1----"
40 #define COOKIE_COOKIE_KEY_LABEL "cookie--"
41 #define COOKIE_SECRET_MAX_AGE 120
42 #define COOKIE_SECRET_LATENCY 5
44 /* Constants for initiation rate limiting */
45 #define RATELIMIT_SIZE (1 << 13)
46 #define RATELIMIT_SIZE_MAX (RATELIMIT_SIZE * 8)
47 #define NSEC_PER_SEC 1000000000LL
48 #define INITIATIONS_PER_SECOND 20
49 #define INITIATIONS_BURSTABLE 5
50 #define INITIATION_COST (NSEC_PER_SEC / INITIATIONS_PER_SECOND)
51 #define TOKEN_MAX (INITIATION_COST * INITIATIONS_BURSTABLE)
52 #define ELEMENT_TIMEOUT 1
53 #define IPV4_MASK_SIZE 4 /* Use all 4 bytes of IPv4 address */
54 #define IPV6_MASK_SIZE 8 /* Use top 8 bytes (/64) of IPv6 address */
56 typedef struct cookie_macs
58 uint8_t mac1[COOKIE_MAC_SIZE];
59 uint8_t mac2[COOKIE_MAC_SIZE];
62 typedef struct cookie_maker
64 uint8_t cp_mac1_key[COOKIE_KEY_SIZE];
65 uint8_t cp_cookie_key[COOKIE_KEY_SIZE];
67 uint8_t cp_cookie[COOKIE_COOKIE_SIZE];
70 uint8_t cp_mac1_last[COOKIE_MAC_SIZE];
73 typedef struct cookie_checker
75 uint8_t cc_mac1_key[COOKIE_KEY_SIZE];
76 uint8_t cc_cookie_key[COOKIE_KEY_SIZE];
78 f64 cc_secret_birthdate;
79 uint8_t cc_secret[COOKIE_SECRET_SIZE];
83 void cookie_maker_init (cookie_maker_t *, const uint8_t[COOKIE_INPUT_SIZE]);
84 void cookie_checker_update (cookie_checker_t *, uint8_t[COOKIE_INPUT_SIZE]);
85 void cookie_maker_mac (cookie_maker_t *, message_macs_t *, void *, size_t);
86 enum cookie_mac_state cookie_checker_validate_macs (vlib_main_t * vm,
88 message_macs_t *, void *,
93 #endif /* __included_wg_cookie_h__ */
96 * fd.io coding-style-patch-verification: ON
99 * eval: (c-set-style "gnu")