mirror of
https://github.com/dashpay/dash.git
synced 2024-12-28 05:23:01 +01:00
35 lines
897 B
C++
35 lines
897 B
C++
// Copyright (c) 2014 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#include "crypto/hmac_sha256.h"
|
|
|
|
#include <string.h>
|
|
|
|
CHMAC_SHA256::CHMAC_SHA256(const unsigned char* key, size_t keylen)
|
|
{
|
|
unsigned char rkey[64];
|
|
if (keylen <= 64) {
|
|
memcpy(rkey, key, keylen);
|
|
memset(rkey + keylen, 0, 64 - keylen);
|
|
} else {
|
|
CSHA256().Write(key, keylen).Finalize(rkey);
|
|
memset(rkey + 32, 0, 32);
|
|
}
|
|
|
|
for (int n = 0; n < 64; n++)
|
|
rkey[n] ^= 0x5c;
|
|
outer.Write(rkey, 64);
|
|
|
|
for (int n = 0; n < 64; n++)
|
|
rkey[n] ^= 0x5c ^ 0x36;
|
|
inner.Write(rkey, 64);
|
|
}
|
|
|
|
void CHMAC_SHA256::Finalize(unsigned char hash[OUTPUT_SIZE])
|
|
{
|
|
unsigned char temp[32];
|
|
inner.Finalize(temp);
|
|
outer.Write(temp, 32).Finalize(hash);
|
|
}
|