mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-27 00:28:10 +00:00
44 lines
1.8 KiB
C
44 lines
1.8 KiB
C
/**
|
|
* Copyright (c) 2019 Andrew R. Kozlik
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __HMAC_DRBG_H__
|
|
#define __HMAC_DRBG_H__
|
|
|
|
#include <sha2.h>
|
|
#include <stdint.h>
|
|
|
|
// HMAC based Deterministic Random Bit Generator with SHA-256
|
|
|
|
typedef struct _HMAC_DRBG_CTX {
|
|
uint32_t odig[SHA256_DIGEST_LENGTH / sizeof(uint32_t)];
|
|
uint32_t idig[SHA256_DIGEST_LENGTH / sizeof(uint32_t)];
|
|
uint32_t v[SHA256_BLOCK_LENGTH / sizeof(uint32_t)];
|
|
} HMAC_DRBG_CTX;
|
|
|
|
void hmac_drbg_init(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len,
|
|
const uint8_t *nonce, size_t nonce_len);
|
|
void hmac_drbg_reseed(HMAC_DRBG_CTX *ctx, const uint8_t *buf, size_t len,
|
|
const uint8_t *addin, size_t addin_len);
|
|
void hmac_drbg_generate(HMAC_DRBG_CTX *ctx, uint8_t *buf, size_t len);
|
|
|
|
#endif
|