32 lines
782 B
C++
32 lines
782 B
C++
// Copyright (c) 2014-2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CRYPTO_HMAC_SHA256_H
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#define BITCOIN_CRYPTO_HMAC_SHA256_H
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#include <crypto/sha256.h>
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#include <stdint.h>
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#include <stdlib.h>
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/** A hasher class for HMAC-SHA-256. */
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class CHMAC_SHA256
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{
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private:
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CSHA256 outer;
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CSHA256 inner;
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public:
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static const size_t OUTPUT_SIZE = 32;
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CHMAC_SHA256(const unsigned char* key, size_t keylen);
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CHMAC_SHA256& Write(const unsigned char* data, size_t len)
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{
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inner.Write(data, len);
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return *this;
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}
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void Finalize(unsigned char hash[OUTPUT_SIZE]);
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};
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#endif // BITCOIN_CRYPTO_HMAC_SHA256_H
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