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// speck.h - written and placed in the public domain by Jeffrey Walton
/// \file speck.h
/// \brief Classes for the Speck block cipher
/// \details Speck is a block cipher designed by Ray Beaulieu, Douglas Shors, Jason Smith,
/// Stefan Treatman-Clark, Bryan Weeks and Louis Wingers.
/// \sa <A HREF="http://eprint.iacr.org/2013/404">The SIMON and SPECK Families of
/// Lightweight Block Ciphers</A>, <A HREF="http://iadgov.github.io/simon-speck/">
/// The Simon and Speck GitHub</A> and <A HREF="https://www.cryptopp.com/wiki/SPECK">
/// SPECK</A> on the Crypto++ wiki.
/// \since Crypto++ 6.0
#ifndef CRYPTOPP_SPECK_H
#define CRYPTOPP_SPECK_H
#include "config.h"
#include "seckey.h"
#include "secblock.h"
#if CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARM64
# define CRYPTOPP_SPECK64_ADVANCED_PROCESS_BLOCKS 1
#endif
#if CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARM64
# define CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS 1
#endif
NAMESPACE_BEGIN(CryptoPP)
/// \brief SPECK block cipher information
/// \tparam L block size of the cipher, in bytes
/// \tparam D default key length, in bytes
/// \tparam N minimum key length, in bytes
/// \tparam M maximum key length, in bytes
/// \since Crypto++ 6.0
template <unsigned int L, unsigned int D, unsigned int N, unsigned int M>
struct SPECK_Info : public FixedBlockSize<L>, VariableKeyLength<D, N, M>
{
static const std::string StaticAlgorithmName()
{
// Format is Cipher-Blocksize(Keylength)
return "SPECK-" + IntToString(L*8);
}
};
/// \brief SPECK block cipher base class
/// \tparam W the word type
/// \details User code should use SPECK64 or SPECK128
/// \sa SPECK64, SPECK128, <a href="http://www.cryptopp.com/wiki/SPECK">SPECK</a>
/// \since Crypto++ 6.0
template <class W>
struct SPECK_Base
{
virtual ~SPECK_Base() {}
SPECK_Base() : m_kwords(0), m_rounds(0) {}
typedef SecBlock<W, AllocatorWithCleanup<W, true> > AlignedSecBlock;
mutable AlignedSecBlock m_wspace; // workspace
AlignedSecBlock m_rkeys; // round keys
unsigned int m_kwords; // number of key words
unsigned int m_rounds; // number of rounds
};
/// \brief SPECK 64-bit block cipher
/// \details Speck is a block cipher designed by Ray Beaulieu, Douglas Shors, Jason Smith,
/// Stefan Treatman-Clark, Bryan Weeks and Louis Wingers.
/// \details SPECK64 provides 64-bit block size. The valid key sizes are 96-bit and 128-bit.
/// \sa SPECK64, SPECK128, <A HREF="http://eprint.iacr.org/2013/404">The SIMON and SPECK
/// Families of Lightweight Block Ciphers</A>, <A HREF="http://iadgov.github.io/simon-speck/">
/// The Simon and Speck GitHub</A>, <a href="http://www.cryptopp.com/wiki/SPECK">SPECK</a> on the
/// Crypto++ wiki
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE SPECK64 : public SPECK_Info<8, 12, 12, 16>, public BlockCipherDocumentation
{
public:
/// \brief SPECK block cipher transformation functions
/// \details Provides implementation common to encryption and decryption
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Base : protected SPECK_Base<word32>, public BlockCipherImpl<SPECK_Info<8, 12, 12, 16> >
{
public:
std::string AlgorithmName() const {
return StaticAlgorithmName() + (m_kwords == 0 ? "" :
"(" + IntToString(m_kwords*sizeof(word32)*8) + ")");
}
std::string AlgorithmProvider() const;
protected:
void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
};
/// \brief Encryption transformation
/// \details Enc provides implementation for encryption transformation. All key
/// sizes are supported.
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SPECK64_ADVANCED_PROCESS_BLOCKS
size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
};
/// \brief Encryption transformation
/// \details Dec provides implementation for decryption transformation. All key
/// sizes are supported.
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Dec : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SPECK64_ADVANCED_PROCESS_BLOCKS
size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
};
typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
/// \brief SPECK 128-bit block cipher
/// \details Speck is a block cipher designed by Ray Beaulieu, Douglas Shors, Jason Smith,
/// Stefan Treatman-Clark, Bryan Weeks and Louis Wingers.
/// \details SPECK128 provides 128-bit block size. The valid key sizes are 128-bit, 192-bit and 256-bit.
/// \sa SPECK64, SPECK128, <A HREF="http://eprint.iacr.org/2013/404">The SIMON and SPECK
/// Families of Lightweight Block Ciphers</A>, <A HREF="http://iadgov.github.io/simon-speck/">
/// The Simon and Speck GitHub</A>, <a href="http://www.cryptopp.com/wiki/SPECK">SPECK</a> on the
/// Crypto++ wiki
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE SPECK128 : public SPECK_Info<16, 16, 16, 32>, public BlockCipherDocumentation
{
public:
/// \brief SPECK block cipher transformation functions
/// \details Provides implementation common to encryption and decryption
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Base : protected SPECK_Base<word64>, public BlockCipherImpl<SPECK_Info<16, 16, 16, 32> >
{
public:
std::string AlgorithmName() const {
return StaticAlgorithmName() + (m_kwords == 0 ? "" :
"(" + IntToString(m_kwords*sizeof(word64)*8) + ")");
}
std::string AlgorithmProvider() const;
protected:
void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
};
/// \brief Encryption transformation
/// \details Enc provides implementation for encryption transformation. All key
/// sizes are supported.
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS
size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
};
/// \brief Encryption transformation
/// \details Dec provides implementation for decryption transformation. All key
/// sizes are supported.
/// \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Dec : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS
size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
};
typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
NAMESPACE_END
#endif // CRYPTOPP_SPECK_H
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