blob: b39ca93fa4148ed5c04dff58e2899e45448cab4d (
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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*!
* \file
*
* \brief DNS cookies processing.
*
* \addtogroup libknot
* @{
*/
#pragma once
#include <stdint.h>
#include <sys/socket.h>
#include "libknot/rrtype/opt.h"
#define KNOT_EDNS_COOKIE_SECRET_SIZE 16
/*!
* \brief DNS Cookie parameters needed to generate/check the cookie value.
*
* \note Client address is not used for the client cookie generation/check.
* \note Server address is not used for the server cookie generation/check.
*/
typedef struct {
uint8_t version; /*!< Server cookie version to generate. */
uint32_t timestamp; /*!< [s] Server cookie generate or check time. */
uint32_t lifetime_before; /*!< [s] Server cookie lifetime in the past. */
uint32_t lifetime_after; /*!< [s] Server cookie lifetime in the future. */
const struct sockaddr_storage *client_addr; /*!< Client socket address. */
const struct sockaddr_storage *server_addr; /*!< Server socket address. */
uint8_t secret[KNOT_EDNS_COOKIE_SECRET_SIZE]; /*!< Cookie secret data. */
} knot_edns_cookie_params_t;
/*!
* \brief Generate a client cookie using given parameters.
*
* \param out Generated client cookie.
* \param params Client cookie parameters.
*
* \retval KNOT_EOK
* \retval KNOT_EINVAL
*/
int knot_edns_cookie_client_generate(knot_edns_cookie_t *out,
const knot_edns_cookie_params_t *params);
/*!
* \brief Check whether client cookie was generated using given parameters.
*
* \param cc Client cookie that should be checked.
* \param params Client cookie parameters.
*
* \retval KNOT_EOK
* \retval KNOT_EINVAL
*/
int knot_edns_cookie_client_check(const knot_edns_cookie_t *cc,
const knot_edns_cookie_params_t *params);
/*!
* \brief Generate a server cookie using given parameters.
*
* \param out Generated server cookie.
* \param cc Client cookie parameter.
* \param params Server cookie parameters.
*
* \retval KNOT_EOK
* \retval KNOT_EINVAL
*/
int knot_edns_cookie_server_generate(knot_edns_cookie_t *out,
const knot_edns_cookie_t *cc,
const knot_edns_cookie_params_t *params);
/*!
* \brief Check whether server cookie was generated using given parameters.
*
* \param sc Server cookie that should be checked.
* \param cc Client cookie parameter.
* \param params Server cookie parameters.
*
* \retval KNOT_EOK
* \retval KNOT_EINVAL
*/
int knot_edns_cookie_server_check(const knot_edns_cookie_t *sc,
const knot_edns_cookie_t *cc,
const knot_edns_cookie_params_t *params);
/*! @} */
|
