1
0
mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-04 21:48:17 +00:00
trezor-firmware/crypto/hmac_drbg.h

44 lines
1.8 KiB
C
Raw Permalink Normal View History

/**
* 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;
2019-06-08 11:39:41 +00:00
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