49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
|
/*
|
||
|
|
* This file is part of the Flowee project
|
||
|
|
* Copyright (C) 2014 The Bitcoin Core developers
|
||
|
|
*
|
||
|
|
* This program is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "hmac_sha256.h"
|
||
|
|
|
||
|
|
#include <cstring>
|
||
|
|
|
||
|
|
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);
|
||
|
|
}
|