src/crypto/sha256.h

   1 // Copyright (c) 2014-2016 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_SHA256_H
   6 #define BITCOIN_CRYPTO_SHA256_H
   7
   8 #include <stdint.h>
   9 #include <stdlib.h>
  10
  11 /** A hasher class for SHA-256. */
  12 class CSHA256
  13 {
  14 private:
  15     uint32_t s[8];
  16     unsigned char buf[64];
  17     uint64_t bytes;
  18
  19 public:
  20     static const size_t OUTPUT_SIZE = 32;
  21
  22     CSHA256();
  23     CSHA256& Write(const unsigned char* data, size_t len);
  24     void Finalize(unsigned char hash[OUTPUT_SIZE]);
  25     CSHA256& Reset();
  26 };
  27
  28 #endif // BITCOIN_CRYPTO_SHA256_H