forked from Green-Sky/tomato
Green Sky
227425b90e
git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* 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 "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
|