1  // Copyright (c) 2014-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #ifndef BITCOIN_CRYPTO_SHA512_H
 6  #define BITCOIN_CRYPTO_SHA512_H
 7  
 8  #include <cstdint>
 9  #include <cstdlib>
10  
11  /** A hasher class for SHA-512. */
12  class CSHA512
13  {
14  private:
15      uint64_t s[8];
16      unsigned char buf[128];
17      uint64_t bytes{0};
18  
19  public:
20      static constexpr size_t OUTPUT_SIZE = 64;
21  
22      CSHA512();
23      CSHA512& Write(const unsigned char* data, size_t len);
24      void Finalize(unsigned char hash[OUTPUT_SIZE]);
25      CSHA512& Reset();
26      uint64_t Size() const { return bytes; }
27  };
28  
29  #endif // BITCOIN_CRYPTO_SHA512_H