sha1.h

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/*
    sha1.hpp - header of
 
    ============
    SHA-1 in C++
    ============
 
    100% Public Domain.
 
    Original C Code
        -- Steve Reid <steve@edmweb.com>
    Small changes to fit into bglibs
        -- Bruce Guenter <bruce@untroubled.org>
    Translation to simpler C++ Code
        -- Volker Grabsch <vog@notjusthosting.com>
    Safety fixes
        -- Eugene Hopkinson <slowriot at voxelstorm dot com>
*/
 
#ifndef WPIUTIL_WPI_SHA1_H_
#define WPIUTIL_WPI_SHA1_H_
 
#include <stdint.h>
 
#include <string>
#include <string_view>
 
namespace wpi {
template <typename T>
class SmallVectorImpl;
class raw_istream;
 
class SHA1 {
 public:
  SHA1();
  void Update(std::string_view s);
  void Update(raw_istream& is);
  std::string Final();
  std::string_view Final(SmallVectorImpl<char>& buf);
  std::string_view RawFinal(SmallVectorImpl<char>& buf);
  static std::string FromFile(std::string_view filename);
 
 private:
  uint32_t digest[5];
  unsigned char buffer[64];
  size_t buf_size;
  uint64_t transforms;
};
 
}  // namespace wpi
 
#endif  // WPIUTIL_WPI_SHA1_H_