github.com/igggame/nebulas-go@v2.1.0+incompatible/nbre/crypto/hash.h (about)

     1  // Copyright (C) 2018 go-nebulas authors
     2  //
     3  // This file is part of the go-nebulas library.
     4  //
     5  // the go-nebulas library is free software: you can redistribute it and/or
     6  // modify
     7  // it under the terms of the GNU General Public License as published by
     8  // the Free Software Foundation, either version 3 of the License, or
     9  // (at your option) any later version.
    10  //
    11  // the go-nebulas library is distributed in the hope that it will be useful,
    12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  // GNU General Public License for more details.
    15  //
    16  // You should have received a copy of the GNU General Public License
    17  // along with the go-nebulas library.  If not, see
    18  // <http://www.gnu.org/licenses/>.
    19  //
    20  #pragma once
    21  #include "common/byte.h"
    22  #include "common/common.h"
    23  #include <cryptopp/sha3.h>
    24  
    25  namespace neb {
    26  namespace crypto {
    27  typedef fix_bytes<32> sha3_256_hash_t;
    28  
    29  sha3_256_hash_t sha3_256_hash(const bytes &b);
    30  
    31  namespace internal {
    32  template <typename T, bool is_arith = std::is_arithmetic<T>::value>
    33  struct sha3_256_hash_helper {};
    34  template <typename T> struct sha3_256_hash_helper<T, true> {
    35    static sha3_256_hash_t get_hash(const T &t) {
    36      bytes b(sizeof(t));
    37      number_to_byte(t, b, sizeof(t));
    38      return sha3_256_hash(b);
    39    }
    40  };
    41  
    42  template <> struct sha3_256_hash_helper<std::string, false> {
    43    static sha3_256_hash_t get_hash(const std::string &t) {
    44      bytes b = string_to_byte(t);
    45      return sha3_256_hash(b);
    46    }
    47  };
    48  
    49  } // namespace internal
    50  template <typename T> sha3_256_hash_t sha3_256_hash(const T &v) {
    51    return internal::sha3_256_hash_helper<T>::get_hash(v);
    52  };
    53  }
    54  typedef crypto::sha3_256_hash_t hash_t;
    55  } // namespace neb