CBC block cipher mode of operation decryption operation. More...

#include <modes.h>

Inheritance diagram for CBC_Decryption:

Collaboration diagram for CBC_Decryption:

Public Member Functions
virtual	~CBC_Decryption ()

void	ProcessData (byte outString, const byte inString, size_t length)
	Encrypt or decrypt an array of bytes. More...

Public Member Functions inherited from CBC_ModeBase
CRYPTOPP_STATIC_CONSTEXPR const char *CRYPTOPP_API	StaticAlgorithmName ()

IV_Requirement	IVRequirement () const
	Minimal requirement for secure IVs. More...

bool	RequireAlignedInput () const

unsigned int	MinLastBlockSize () const
	Provides the size of the last block. More...

Public Member Functions inherited from BlockOrientedCipherModeBase
virtual	~BlockOrientedCipherModeBase ()

void	UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs &params)
	Sets the key for this object without performing parameter validation. More...

unsigned int	MandatoryBlockSize () const
	Provides the mandatory block size of the cipher. More...

bool	IsRandomAccess () const
	Determines whether the cipher supports random access. More...

bool	IsSelfInverting () const
	Determines whether the cipher is self-inverting. More...

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

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

Public Member Functions inherited from CipherModeBase
virtual	~CipherModeBase ()

size_t	MinKeyLength () const
	Returns smallest valid key length. More...

size_t	MaxKeyLength () const
	Returns largest valid key length. More...

size_t	DefaultKeyLength () const
	Returns default key length. More...

size_t	GetValidKeyLength (size_t n) const
	Returns a valid key length for the algorithm. More...

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

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

unsigned int	IVSize () const
	Returns length of the IV accepted by this object. More...

void	SetCipher (BlockCipher &cipher)

void	SetCipherWithIV (BlockCipher &cipher, const byte *iv, int feedbackSize=0)

Public Member Functions inherited from SimpleKeyingInterface
virtual	~SimpleKeyingInterface ()

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

Public Member Functions inherited from StreamTransformation
virtual	~StreamTransformation ()

StreamTransformation &	Ref ()
	Provides a reference to this object. More...

virtual unsigned int	OptimalBlockSize () const
	Provides the input block size most efficient for this cipher. More...

virtual unsigned int	GetOptimalBlockSizeUsed () const
	Provides the number of bytes used in the current block when processing at optimal block size. More...

virtual void	ProcessLastBlock (byte outString, const byte inString, size_t length)
	Encrypt or decrypt the last block of data. More...

void	ProcessString (byte *inoutString, size_t length)
	Encrypt or decrypt a string of bytes. More...

void	ProcessString (byte outString, const byte inString, size_t length)
	Encrypt or decrypt a string of bytes. More...

byte	ProcessByte (byte input)
	Encrypt or decrypt a byte. More...

virtual void	Seek (lword pos)
	Seek to an absolute position. More...

Public Member Functions inherited from Algorithm
virtual	~Algorithm ()

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

virtual std::string	AlgorithmName () const
	Provides the name of this algorithm. More...

Public Member Functions inherited from Clonable
virtual	~Clonable ()

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

Protected Member Functions
virtual void	ResizeBuffers ()

Protected Member Functions inherited from BlockOrientedCipherModeBase
bool	RequireAlignedInput () const

Protected Member Functions inherited from CipherModeBase
	CipherModeBase ()

unsigned int	BlockSize () const

virtual void	SetFeedbackSize (unsigned int feedbackSize)

Protected Member Functions inherited from SymmetricCipher
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
AlignedSecByteBlock	m_temp

Protected Attributes inherited from BlockOrientedCipherModeBase
SecByteBlock	m_buffer

Protected Attributes inherited from CipherModeBase
BlockCipher *	m_cipher

AlignedSecByteBlock	m_register

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...

Detailed Description

CBC block cipher mode of operation decryption operation.

Definition at line 261 of file modes.h.

Constructor & Destructor Documentation

virtual CBC_Decryption::~CBC_Decryption ( )

inlinevirtual

Definition at line 264 of file modes.h.

Member Function Documentation

void CBC_Decryption::ProcessData	(	byte *	outString,
		const byte *	inString,
		size_t	length
	)

virtual

Encrypt or decrypt an array of bytes.

Parameters

outString	the output byte buffer
inString	the input byte buffer
length	the size of the input and output byte buffers, in bytes

Either inString == outString, or they must not overlap.

Implements StreamTransformation.

Definition at line 221 of file modes.cpp.

Here is the call graph for this function:

void CBC_Decryption::ResizeBuffers ( )

protectedvirtual

Reimplemented from BlockOrientedCipherModeBase.

Definition at line 215 of file modes.cpp.

Here is the call graph for this function:

Member Data Documentation

AlignedSecByteBlock CBC_Decryption::m_temp

protected

Definition at line 270 of file modes.h.

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

src/cryptopp/modes.h
src/cryptopp/modes.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation