// blowfish.h - originally written and placed in the public domain by Wei Dai

/// \file blowfish.h

/// \brief Classes for the Blowfish block cipher

#ifndef CRYPTOPP_BLOWFISH_H

#define CRYPTOPP_BLOWFISH_H

#include "seckey.h"

#include "secblock.h"

NAMESPACE_BEGIN(CryptoPP)

/// \brief Blowfish block cipher information

struct Blowfish_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 4, 56>, public FixedRounds<16>

{

  CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Blowfish";}

};

// <a href="http://www.cryptopp.com/wiki/Blowfish">Blowfish</a>

/// \brief Blowfish block cipher

/// \since Crypto++ 1.0

class Blowfish : public Blowfish_Info, public BlockCipherDocumentation

{

  /// \brief Class specific implementation and overrides used to operate the cipher.

  /// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions

  class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Blowfish_Info>

  {

  public:

    void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

    void UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &params);

  private:

    void crypt_block(const word32 in[2], word32 out[2]) const;

    static const word32 p_init[ROUNDS+2];

    static const word32 s_init[4*256];

    FixedSizeSecBlock<word32, ROUNDS+2> pbox;

    FixedSizeSecBlock<word32, 4*256> sbox;

  };

public:

  typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;

  typedef BlockCipherFinal<DECRYPTION, Base> Decryption;

};

typedef Blowfish::Encryption BlowfishEncryption;

typedef Blowfish::Decryption BlowfishDecryption;

NAMESPACE_END

#endif