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