// aria.h - written and placed in the public domain by Jeffrey Walton

/// \file aria.h

/// \brief Classes for the ARIA block cipher

/// \details The Crypto++ ARIA implementation is based on the 32-bit implementation by Aaram Yun

///   from the National Security Research Institute, KOREA. Aaram Yun's implementation is based on

///   the 8-bit implementation by Jin Hong. The source files are available in ARIA.zip from the Korea

///   Internet & Security Agency website.

/// \sa <A HREF="http://tools.ietf.org/html/rfc5794">RFC 5794, A Description of the ARIA Encryption Algorithm</A>,

///   <A HREF="http://seed.kisa.or.kr/iwt/ko/bbs/EgovReferenceList.do?bbsId=BBSMSTR_000000000002">Korea

///   Internet & Security Agency homepage</A>

#ifndef CRYPTOPP_ARIA_H

#define CRYPTOPP_ARIA_H

#include "config.h"

#include "seckey.h"

#include "secblock.h"

NAMESPACE_BEGIN(CryptoPP)

/// \brief ARIA block cipher information

/// \since Crypto++ 6.0

struct ARIA_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>

{

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

};

/// \brief ARIA block cipher

/// \details The Crypto++ ARIA implementation is based on the 32-bit implementation by Aaram Yun

///   from the National Security Research Institute, KOREA. Aaram Yun's implementation is based on

///   the 8-bit implementation by Jin Hong. The source files are available in ARIA.zip from the Korea

///   Internet & Security Agency website.

/// \sa <A HREF="http://tools.ietf.org/html/rfc5794">RFC 5794, A Description of the ARIA Encryption Algorithm</A>,

///   <A HREF="http://seed.kisa.or.kr/iwt/ko/bbs/EgovReferenceList.do?bbsId=BBSMSTR_000000000002">Korea

///   Internet & Security Agency homepage</A>

/// \sa <a href="http://www.cryptopp.com/wiki/ARIA">ARIA</a>

/// \since Crypto++ 6.0

class ARIA : public ARIA_Info, public BlockCipherDocumentation

{

public:

  class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<ARIA_Info>

  {

  public:

    Base() : m_rounds(0) {}

  protected:

    void UncheckedSetKey(const byte *key, unsigned int keylen, const NameValuePairs &params);

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

  private:

    // Reference implementation allocates a table of 17 round keys.

    typedef SecBlock<byte, AllocatorWithCleanup<byte, true> >     AlignedByteBlock;

    typedef SecBlock<word32, AllocatorWithCleanup<word32, true> > AlignedWordBlock;

    AlignedWordBlock  m_rk;  // round keys

    AlignedWordBlock  m_w;   // w0, w1, w2, w3, t and u

    unsigned int m_rounds;

  };

public:

  typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;

  typedef BlockCipherFinal<DECRYPTION, Base> Decryption;

};

typedef ARIA::Encryption ARIAEncryption;

typedef ARIA::Decryption ARIADecryption;

NAMESPACE_END

#endif