/*

* Threefish-512

* (C) 2013,2014 Jack Lloyd

*

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

*/

#ifndef BOTAN_THREEFISH_512_H_

#define BOTAN_THREEFISH_512_H_

#include <botan/block_cipher.h>

namespace Botan {

/**

* Threefish-512

*/

class Threefish_512 final :

   public Block_Cipher_Fixed_Params<64, 64, 0, 1, Tweakable_Block_Cipher>

   {

   public:

      void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;

      void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;

      void set_tweak(const uint8_t tweak[], size_t len) override;

      void clear() override;

      std::string name() const override { return "Threefish-512"; }

      std::unique_ptr<BlockCipher> new_object() const override { return std::make_unique<Threefish_512>(); }

      bool has_keying_material() const override;

   private:

      void key_schedule(const uint8_t key[], size_t key_len) override;

      // Interface for Skein

      friend class Skein_512;

      void skein_feedfwd(const secure_vector<uint64_t>& M,

                         const secure_vector<uint64_t>& T);

      // Private data

      secure_vector<uint64_t> m_T;

      secure_vector<uint64_t> m_K;

   };

}

#endif