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// Copyright (c) 2014 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CRYPTO_SHA2_H
#define BITCOIN_CRYPTO_SHA2_H
#include <stdint.h>
#include <stdlib.h>
/** A hasher class for SHA-256. */
class CSHA256
{
private:
uint32_t s[8];
unsigned char buf[64];
size_t bytes;
public:
static const size_t OUTPUT_SIZE = 32;
CSHA256();
CSHA256& Write(const unsigned char* data, size_t len);
void Finalize(unsigned char hash[OUTPUT_SIZE]);
CSHA256& Reset();
};
/** A hasher class for SHA-512. */
class CSHA512
{
private:
uint64_t s[8];
unsigned char buf[128];
size_t bytes;
public:
static const size_t OUTPUT_SIZE = 64;
CSHA512();
CSHA512& Write(const unsigned char* data, size_t len);
void Finalize(unsigned char hash[OUTPUT_SIZE]);
CSHA512& Reset();
};
/** A hasher class for HMAC-SHA-512. */
class CHMAC_SHA512
{
private:
CSHA512 outer;
CSHA512 inner;
public:
static const size_t OUTPUT_SIZE = 64;
CHMAC_SHA512(const unsigned char* key, size_t keylen);
CHMAC_SHA512& Write(const unsigned char* data, size_t len)
{
inner.Write(data, len);
return *this;
}
void Finalize(unsigned char hash[OUTPUT_SIZE]);
};
#endif // BITCOIN_CRYPTO_SHA2_H
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