git / moonbite-core / src/crypto/hmac_sha256.cpp · raw

// Copyright (c) 2014-2018 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);}