Bitcoin Core
22.99.0
P2P Digital Currency
src
crypto
hmac_sha256.cpp
Go to the documentation of this file.
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// Copyright (c) 2014-2018 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/hmac_sha256.h
>
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#include <
string.h
>
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CHMAC_SHA256::CHMAC_SHA256
(
const
unsigned
char
* key,
size_t
keylen)
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{
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unsigned
char
rkey[64];
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if
(keylen <= 64) {
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memcpy(rkey, key, keylen);
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memset(rkey + keylen, 0, 64 - keylen);
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}
else
{
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CSHA256
().
Write
(key, keylen).
Finalize
(rkey);
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memset(rkey + 32, 0, 32);
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}
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for
(
int
n = 0; n < 64; n++)
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rkey[n] ^= 0x5c;
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outer
.
Write
(rkey, 64);
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for
(
int
n = 0; n < 64; n++)
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rkey[n] ^= 0x5c ^ 0x36;
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inner
.
Write
(rkey, 64);
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}
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void
CHMAC_SHA256::Finalize
(
unsigned
char
hash[OUTPUT_SIZE])
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{
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unsigned
char
temp[32];
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inner
.
Finalize
(temp);
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outer
.
Write
(temp, 32).
Finalize
(hash);
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}
CHMAC_SHA256::Finalize
void Finalize(unsigned char hash[OUTPUT_SIZE])
Definition:
hmac_sha256.cpp:29
hmac_sha256.h
CSHA256::Write
CSHA256 & Write(const unsigned char *data, size_t len)
Definition:
sha256.cpp:689
string.h
CHMAC_SHA256::CHMAC_SHA256
CHMAC_SHA256(const unsigned char *key, size_t keylen)
Definition:
hmac_sha256.cpp:9
CHMAC_SHA256::inner
CSHA256 inner
Definition:
hmac_sha256.h:18
CSHA256::Finalize
void Finalize(unsigned char hash[OUTPUT_SIZE])
Definition:
sha256.cpp:715
CHMAC_SHA256::outer
CSHA256 outer
Definition:
hmac_sha256.h:17
CSHA256
A hasher class for SHA-256.
Definition:
sha256.h:13
Generated on Fri Feb 18 2022 20:03:16 for Bitcoin Core by
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