SKIPJACK block cipher decryption operation. More...

Inheritance diagram for SKIPJACK::Dec:

Collaboration diagram for SKIPJACK::Dec:

Public Member Functions
void	ProcessAndXorBlock (const byte inBlock, const byte xorBlock, byte *outBlock) const
	Decrypt a single block of data. More...

Public Member Functions inherited from SKIPJACK::Base
void	UncheckedSetKey (const byte *userKey, unsigned int length, const NameValuePairs &params)
	Preprocess a user key into a table to save an XOR at each F-table access. More...

unsigned int	OptimalDataAlignment () const
	Provides input and output data alignment for optimal performance. More...

Public Member Functions inherited from BlockCipherImpl< SKIPJACK_Info >
unsigned int	BlockSize () const
	Provides the block size of the algorithm. More...

Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, SKIPJACK_Info > > >
std::string	AlgorithmName () const

Public Member Functions inherited from SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, SKIPJACK_Info > >
size_t	MinKeyLength () const
	The minimum key length used by the algorithm. More...

size_t	MaxKeyLength () const
	The maximum key length used by the algorithm. More...

size_t	DefaultKeyLength () const
	The default key length used by the algorithm. More...

size_t	GetValidKeyLength (size_t keylength) const
	Provides a valid key length for the algorithm. More...

SimpleKeyingInterface::IV_Requirement	IVRequirement () const
	The default IV requirements for the algorithm. More...

unsigned int	IVSize () const
	The default initialization vector length for the algorithm. More...

Public Member Functions inherited from SimpleKeyingInterface
virtual	~SimpleKeyingInterface ()

virtual bool	IsValidKeyLength (size_t keylength) const
	Returns whether keylength is a valid key length. More...

virtual void	SetKey (const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
	Sets or reset the key of this object. More...

void	SetKeyWithRounds (const byte *key, size_t length, int rounds)
	Sets or reset the key of this object. More...

void	SetKeyWithIV (const byte key, size_t length, const byte iv, size_t ivLength)
	Sets or reset the key of this object. More...

void	SetKeyWithIV (const byte key, size_t length, const byte iv)
	Sets or reset the key of this object. More...

bool	IsResynchronizable () const
	Determines if the object can be resynchronized. More...

bool	CanUseRandomIVs () const
	Determines if the object can use random IVs. More...

bool	CanUsePredictableIVs () const
	Determines if the object can use random but possibly predictable IVs. More...

bool	CanUseStructuredIVs () const
	Determines if the object can use structured IVs. More...

unsigned int	DefaultIVLength () const
	Provides the default size of an IV. More...

virtual unsigned int	MinIVLength () const
	Provides the minimum size of an IV. More...

virtual unsigned int	MaxIVLength () const
	Provides the maximum size of an IV. More...

virtual void	Resynchronize (const byte *iv, int ivLength=-1)
	Resynchronize with an IV. More...

virtual void	GetNextIV (RandomNumberGenerator &rng, byte *iv)
	Retrieves a secure IV for the next message. More...

Public Member Functions inherited from BlockTransformation
virtual	~BlockTransformation ()

void	ProcessBlock (const byte inBlock, byte outBlock) const
	Encrypt or decrypt a block. More...

void	ProcessBlock (byte *inoutBlock) const
	Encrypt or decrypt a block in place. More...

virtual bool	IsPermutation () const
	returns true if this is a permutation (i.e. there is an inverse transformation) More...

virtual bool	IsForwardTransformation () const =0
	Determines if the cipher is being operated in its forward direction. More...

virtual unsigned int	OptimalNumberOfParallelBlocks () const
	Determines the number of blocks that can be processed in parallel. More...

virtual size_t	AdvancedProcessBlocks (const byte inBlocks, const byte xorBlocks, byte *outBlocks, size_t length, word32 flags) const
	Encrypt and xor multiple blocks using additional flags. More...

CipherDir	GetCipherDirection () const
	Provides the direction of the cipher. More...

Public Member Functions inherited from Algorithm
virtual	~Algorithm ()

	Algorithm (bool checkSelfTestStatus=true)
	Interface for all crypto algorithms. More...

Public Member Functions inherited from Clonable
virtual	~Clonable ()

virtual Clonable *	Clone () const
	Copies this object. More...

Public Member Functions inherited from FixedKeyLength< 10 >
CRYPTOPP_STATIC_CONSTEXPR size_t CRYPTOPP_API	StaticGetValidKeyLength (size_t keylength)
	The default key length used by the algorithm provided as a constant. More...

Static Private Attributes
static const byte	Sd [256]

static const word32	Td [4][256]

Additional Inherited Members
Public Types inherited from SimpleKeyingInterface
enum	IV_Requirement { UNIQUE_IV = 0, RANDOM_IV, UNPREDICTABLE_RANDOM_IV, INTERNALLY_GENERATED_IV, NOT_RESYNCHRONIZABLE }
	Secure IVs requirements as enumerated values. More...

Public Types inherited from BlockTransformation
enum	FlagsForAdvancedProcessBlocks { BT_InBlockIsCounter =1, BT_DontIncrementInOutPointers =2, BT_XorInput =4, BT_ReverseDirection =8, BT_AllowParallel =16 }
	Bit flags that control AdvancedProcessBlocks() behavior. More...

Static Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, SKIPJACK_Info > > >
static std::string CRYPTOPP_API	StaticAlgorithmName ()

Static Public Member Functions inherited from SKIPJACK_Info
static CRYPTOPP_DLL const char *CRYPTOPP_API	StaticAlgorithmName ()

Protected Member Functions inherited from BlockCipher
const Algorithm &	GetAlgorithm () const
	Returns the base class Algorithm. More...

Protected Member Functions inherited from SimpleKeyingInterface
void	ThrowIfInvalidKeyLength (size_t length)
	Validates the key length. More...

void	ThrowIfResynchronizable ()
	Validates the object. More...

void	ThrowIfInvalidIV (const byte *iv)
	Validates the IV. More...

size_t	ThrowIfInvalidIVLength (int length)
	Validates the IV length. More...

const byte *	GetIVAndThrowIfInvalid (const NameValuePairs &params, size_t &size)
	Retrieves and validates the IV. More...

void	AssertValidKeyLength (size_t length) const
	Validates the key length. More...

Protected Attributes inherited from SKIPJACK::Base
FixedSizeSecBlock< byte, 10 *256 >	tab

Static Protected Attributes inherited from SKIPJACK::Base
static const byte	fTable [256]
	The F-table byte permutation (see description of the G-box permutation) More...

Detailed Description

SKIPJACK block cipher decryption operation.

Definition at line 53 of file skipjack.h.

Member Function Documentation

void SKIPJACK::Dec::ProcessAndXorBlock	(	const byte *	inBlock,
		const byte *	xorBlock,
		byte *	outBlock
	)		const

virtual

Decrypt a single block of data.

Implements BlockTransformation.

Definition at line 152 of file skipjack.cpp.

Here is the call graph for this function:

Member Data Documentation

const byte SKIPJACK::Dec::Sd[256]

staticprivate

Definition at line 58 of file skipjack.h.

const word32 SKIPJACK::Dec::Td[4][256]

staticprivate

Definition at line 59 of file skipjack.h.

The documentation for this class was generated from the following files:

src/cryptopp/skipjack.h
src/cryptopp/skipjack.cpp

Public Member Functions

Static Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

Member Data Documentation