git / moonbite-core / src/crypto/hkdf_sha256_32.cpp · raw

// Copyright (c) 2018-2019 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/hkdf_sha256_32.h>#include <assert.h>#include <string.h>CHKDF_HMAC_SHA256_L32::CHKDF_HMAC_SHA256_L32(const unsigned char* ikm, size_t ikmlen, const std::string& salt){    CHMAC_SHA256((const unsigned char*)salt.data(), salt.size()).Write(ikm, ikmlen).Finalize(m_prk);}void CHKDF_HMAC_SHA256_L32::Expand32(const std::string& info, unsigned char hash[OUTPUT_SIZE]){    // expand a 32byte key (single round)    assert(info.size() <= 128);    static const unsigned char one[1] = {1};    CHMAC_SHA256(m_prk, 32).Write((const unsigned char*)info.data(), info.size()).Write(one, 1).Finalize(hash);}