/*

* SM3

* (C) 2017 Ribose Inc.

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_SM3_H_

#define BOTAN_SM3_H_

#include <botan/internal/mdx_hash.h>

namespace Botan {

enum {

  SM3_BLOCK_BYTES = 64,

  SM3_DIGEST_BYTES = 32

};

/**

* SM3

*/

class SM3 final : public MDx_HashFunction

   {

   public:

      std::string name() const override { return "SM3"; }

      size_t output_length() const override { return SM3_DIGEST_BYTES; }

      std::unique_ptr<HashFunction> new_object() const override { return std::make_unique<SM3>(); }

      std::unique_ptr<HashFunction> copy_state() const override;

      void clear() override;

      SM3() : MDx_HashFunction(SM3_BLOCK_BYTES, true, true), m_digest(SM3_DIGEST_BYTES)

         { clear(); }

   private:

      void compress_n(const uint8_t[], size_t blocks) override;

      void copy_out(uint8_t[]) override;

      /**

      * The digest value

      */

      secure_vector<uint32_t> m_digest;

   };

}

#endif