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
|
/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2019-2021 The TokTok team.
*/
#ifndef C_TOXCORE_TOXCORE_TIMED_AUTH_H
#define C_TOXCORE_TOXCORE_TIMED_AUTH_H
#include "attributes.h"
#include "crypto_core.h"
#include "mono_time.h"
#define TIMED_AUTH_SIZE CRYPTO_HMAC_SIZE
/**
* @brief Write timed authentication code of data to timed_auth.
*
* @param timed_auth Must be of size TIMED_AUTH_SIZE.
*/
non_null(1, 3, 6) nullable(4)
void generate_timed_auth(const Mono_Time *mono_time, uint16_t timeout, const uint8_t *key,
const uint8_t *data, uint16_t length, uint8_t *timed_auth);
/**
* @brief Check timed_auth. This succeeds if `timed_auth` was generated by
* `generate_timed_auth` at most `timeout` seconds ago, and fails if at least
* `2*timeout` seconds ago. More precisely, it succeeds iff
* `current_time / timeout` is equal to or one more than
* `creation_time / timeout`.
*
* @param timed_auth Must be of size TIMED_AUTH_SIZE.
* @return true on success, false otherwise.
*/
non_null(1, 3, 6) nullable(4)
bool check_timed_auth(const Mono_Time *mono_time, uint16_t timeout, const uint8_t *key,
const uint8_t *data, uint16_t length, const uint8_t *timed_auth);
#endif /* C_TOXCORE_TOXCORE_TIMED_AUTH_H */
|
