Bitcoin Core
21.99.0
P2P Digital Currency
src
crypto
hkdf_sha256_32.cpp
Go to the documentation of this file.
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// Copyright (c) 2018-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <
crypto/hkdf_sha256_32.h
>
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#include <assert.h>
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#include <
string.h
>
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CHKDF_HMAC_SHA256_L32::CHKDF_HMAC_SHA256_L32
(
const
unsigned
char
* ikm,
size_t
ikmlen,
const
std::string& salt)
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{
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CHMAC_SHA256
((
const
unsigned
char
*)salt.data(), salt.size()).
Write
(ikm, ikmlen).
Finalize
(
m_prk
);
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}
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void
CHKDF_HMAC_SHA256_L32::Expand32
(
const
std::string& info,
unsigned
char
hash[OUTPUT_SIZE])
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{
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// expand a 32byte key (single round)
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assert
(info.size() <= 128);
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static
const
unsigned
char
one[1] = {1};
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CHMAC_SHA256
(
m_prk
, 32).
Write
((
const
unsigned
char
*)info.data(), info.size()).
Write
(one, 1).
Finalize
(hash);
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}
CHMAC_SHA256::Finalize
void Finalize(unsigned char hash[OUTPUT_SIZE])
Definition:
hmac_sha256.cpp:29
CHKDF_HMAC_SHA256_L32::Expand32
void Expand32(const std::string &info, unsigned char hash[OUTPUT_SIZE])
Definition:
hkdf_sha256_32.cpp:15
CHKDF_HMAC_SHA256_L32::CHKDF_HMAC_SHA256_L32
CHKDF_HMAC_SHA256_L32(const unsigned char *ikm, size_t ikmlen, const std::string &salt)
Definition:
hkdf_sha256_32.cpp:10
string.h
CHMAC_SHA256
A hasher class for HMAC-SHA-256.
Definition:
hmac_sha256.h:14
CHMAC_SHA256::Write
CHMAC_SHA256 & Write(const unsigned char *data, size_t len)
Definition:
hmac_sha256.h:24
CHKDF_HMAC_SHA256_L32::m_prk
unsigned char m_prk[32]
Definition:
hkdf_sha256_32.h:17
assert
assert(std::addressof(::ChainstateActive().CoinsTip())==std::addressof(coins_cache))
hkdf_sha256_32.h
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