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// 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.
#ifndef BITCOIN_CRYPTO_HMAC_SHA256_H
#define BITCOIN_CRYPTO_HMAC_SHA256_H
#include <crypto/sha256.h>
#include <stdint.h>
#include <stdlib.h>
/** A hasher class for HMAC-SHA-256. */
class CHMAC_SHA256
{
private:
CSHA256 outer;
CSHA256 inner;
public:
static const size_t OUTPUT_SIZE = 32;
CHMAC_SHA256(const unsigned char* key, size_t keylen);
CHMAC_SHA256& Write(const unsigned char* data, size_t len)
{
inner.Write(data, len);
return *this;
}
void Finalize(unsigned char hash[OUTPUT_SIZE]);
};
#endif // BITCOIN_CRYPTO_HMAC_SHA256_H
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