sha256.h

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#ifndef SRC_INCLUDE_SHA256_H_
#define SRC_INCLUDE_SHA256_H_
 
#include <array>
#include <cstdint>
#include <cstdio>
#include <string>
 
namespace smash {
namespace sha256 {
 
constexpr size_t HASH_SIZE = 256 / 8;
 
typedef std::array<uint8_t, HASH_SIZE> Hash;
 
class Context {
 private:
  uint64_t length_;
  uint32_t state_[8];
  size_t curlen_;
  uint8_t buf_[64];
 
  void transform_function(uint8_t const* buffer);
 
 public:
  Context() { reset(); }
 
  void reset();
 
  void update(uint8_t const* buffer, size_t buffer_size);
 
  void update(const std::string& buffer);
 
  Hash finalize();
};
 
Hash calculate(uint8_t const* buffer, size_t buffer_size);
 
std::string hash_to_string(Hash hash);
 
}  // namespace sha256
}  // namespace smash
 
#endif  // SRC_INCLUDE_SHA256_H_