Utils_SHA3.hh

Go to the documentation of this file.

#pragma once
 
#ifndef UTILS_SHA3_HH
#define UTILS_SHA3_HH
 
#include "Utils.hh"
 
#include <string>
#include <iostream>
#include <cstdint>
 
namespace Utils {

  class SHA3 {
 
    using uint8_t  = std::uint8_t;
    using uint64_t = std::uint64_t;
 
    // Round state
    uint8_t  *m_buffer_location{nullptr}; // used for writing and to know when to flush the buffer
    uint64_t m_state[5][5];
    uint64_t m_message_buffer_64[1600/8];  // rate bits wide, defined during construction
 
    int m_digest_size{0}; // bytes
 
    // Digest-length specific Values
    int m_sponge_capacity{0};
    int m_sponge_rate{0};
 
    void m_reset();
    void m_perform_rounds( int rounds );
    void m_absorb_buffer();
 
    // Debugging
    void m_print_message_buffer( ostream_type & stream ) const;
    void m_print_sponge( ostream_type & stream ) const;
 
  public:

    explicit SHA3( int digest_size );

    ~SHA3() { }

    void hash_string( string_view str );

    void hash_hex_string( string_view str );

    string digest_in_hex();
 

    int digest_size() const { return m_digest_size; }

    void hash( const int b );

    void digest( uint8_t * d );
  };
}
 
#endif