Swiften/StringCodecs/SHA256.h

/*
 * Copyright (c) 2010 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#pragma once

#include <vector>
#include <boost/cstdint.hpp>

#include <Swiften/Base/API.h>
#include <Swiften/Base/ByteArray.h>
#include <Swiften/Base/SafeByteArray.h>

namespace Swift {
  class SWIFTEN_API SHA256 {
    public:
      SHA256();

      SHA256& update(const std::vector<unsigned char>& data);
      std::vector<unsigned char> getHash() const;

      static ByteArray getHash(const ByteArray& data);
      static ByteArray getHash(const SafeByteArray& data);

      ByteArray operator()(const SafeByteArray& data) {
        return getHash(data);
      }

      ByteArray operator()(const ByteArray& data) {
        return getHash(data);
      }

    private:
      struct State {
          boost::uint64_t length;
          boost::uint32_t state[8], curlen;
          unsigned char buf[64];
      };

      static int init(State *md);
      static int process(State * md, const unsigned char *in, unsigned int inlen);
      static int compress(State *md, unsigned char *buf);
      static int done(State * md, unsigned char *out);

      template<typename Container> static ByteArray getHashInternal(const Container& input);

    private:
      State state;
  };
}