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https://github.com/trezor/trezor-firmware.git
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32bda8d1d9
The old implementation needed 6 sha transformations per iterations: - 2 for computing sha512 of seed, - 2 for computing digests of ipads/opads, - 2 for computing digests of intermediate hashes. The first 4 transformations are the same in every iteration so we cache them. A new function hmac_sha512_prepare computes these digests. We made sha512_Transform visible in pbkdf2 and prevent unneccessary big/little endian conversions back and forth.
53 lines
2.4 KiB
C
53 lines
2.4 KiB
C
/**
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* Copyright (c) 2013-2014 Tomas Dzetkulic
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* Copyright (c) 2013-2014 Pavol Rusnak
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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 HMAC_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_H__
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#define __HMAC_H__
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#include <stdint.h>
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#include "sha2.h"
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typedef struct _HMAC_SHA256_CTX {
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uint8_t o_key_pad[SHA256_BLOCK_LENGTH];
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SHA256_CTX ctx;
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} HMAC_SHA256_CTX;
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typedef struct _HMAC_SHA512_CTX {
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uint8_t o_key_pad[SHA512_BLOCK_LENGTH];
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SHA512_CTX ctx;
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} HMAC_SHA512_CTX;
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void hmac_sha256_Init(HMAC_SHA256_CTX *hctx, const uint8_t *key, const uint32_t keylen);
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void hmac_sha256_Update(HMAC_SHA256_CTX *hctx, const uint8_t *msg, const uint32_t msglen);
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void hmac_sha256_Final(HMAC_SHA256_CTX *hctx, uint8_t *hmac);
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void hmac_sha256(const uint8_t *key, const uint32_t keylen, const uint8_t *msg, const uint32_t msglen, uint8_t *hmac);
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void hmac_sha256_prepare(const uint8_t *key, const uint32_t keylen, uint32_t *opad_digest, uint32_t *ipad_digest);
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void hmac_sha512_Init(HMAC_SHA512_CTX *hctx, const uint8_t *key, const uint32_t keylen);
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void hmac_sha512_Update(HMAC_SHA512_CTX *hctx, const uint8_t *msg, const uint32_t msglen);
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void hmac_sha512_Final(HMAC_SHA512_CTX *hctx, uint8_t *hmac);
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void hmac_sha512(const uint8_t *key, const uint32_t keylen, const uint8_t *msg, const uint32_t msglen, uint8_t *hmac);
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void hmac_sha512_prepare(const uint8_t *key, const uint32_t keylen, uint64_t *opad_digest, uint64_t *ipad_digest);
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#endif
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