mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-17 03:48:09 +00:00
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
|
/*
|
||
|
|
* This file is part of the Trezor project, https://trezor.io/
|
||
|
|
*
|
||
|
|
* Copyright (c) SatoshiLabs
|
||
|
|
*
|
||
|
|
* 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 <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __CHACHA_DRBG__
|
||
|
|
#define __CHACHA_DRBG__
|
||
|
|
|
||
|
|
#include "chacha20poly1305/chacha20poly1305.h"
|
||
|
|
|
||
|
|
// Very fast deterministic random bit generator inspired by CTR_DRBG in NIST SP
|
||
|
|
// 800-90A
|
||
|
|
|
||
|
|
#define CHACHA_DRBG_KEY_LENGTH 16
|
||
|
|
#define CHACHA_DRBG_IV_LENGTH 8
|
||
|
|
#define CHACHA_DRBG_SEED_LENGTH (CHACHA_DRBG_KEY_LENGTH + CHACHA_DRBG_IV_LENGTH)
|
||
|
|
|
||
|
|
typedef struct _CHACHA_DRBG_CTX {
|
||
|
|
ECRYPT_ctx chacha_ctx;
|
||
|
|
uint32_t reseed_counter;
|
||
|
|
} CHACHA_DRBG_CTX;
|
||
|
|
|
||
|
|
void chacha_drbg_init(CHACHA_DRBG_CTX *ctx,
|
||
|
|
const uint8_t entropy[CHACHA_DRBG_SEED_LENGTH]);
|
||
|
|
void chacha_drbg_reseed(CHACHA_DRBG_CTX *ctx,
|
||
|
|
const uint8_t entropy[CHACHA_DRBG_SEED_LENGTH]);
|
||
|
|
void chacha_drbg_generate(CHACHA_DRBG_CTX *ctx, uint8_t *output,
|
||
|
|
uint8_t output_length);
|
||
|
|
#endif // __CHACHA_DRBG__
|