/*

* CBC-MAC

* (C) 1999-2007 Jack Lloyd

*

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

*/

#ifndef BOTAN_CBC_MAC_H_

#define BOTAN_CBC_MAC_H_

#include <botan/mac.h>

#include <botan/block_cipher.h>

BOTAN_FUTURE_INTERNAL_HEADER(cbc_mac.h)

namespace Botan {

/**

* CBC-MAC

*/

class BOTAN_PUBLIC_API(2,0) CBC_MAC final : public MessageAuthenticationCode

   {

   public:

      std::string name() const override;

      MessageAuthenticationCode* clone() const override;

      size_t output_length() const override { return m_cipher->block_size(); }

      void clear() override;

      Key_Length_Specification key_spec() const override

         {

         return m_cipher->key_spec();

         }

      /**

      * @param cipher the block cipher to use

      */

      explicit CBC_MAC(BlockCipher* cipher);

   private:

      void add_data(const uint8_t[], size_t) override;

      void final_result(uint8_t[]) override;

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

      std::unique_ptr<BlockCipher> m_cipher;

      secure_vector<uint8_t> m_state;

      size_t m_position = 0;

   };

}

#endif