CRC-32 Checksum Calculation. More...

#include <crc.h>

Inheritance diagram for CRC32:

Collaboration diagram for CRC32:

Public Member Functions
	CRC32 ()

void	Update (const byte *input, size_t length)
	Updates a hash with additional input. More...

void	TruncatedFinal (byte *hash, size_t size)
	Computes the hash of the current message. More...

unsigned int	DigestSize () const
	Provides the digest size of the hash. More...

CRYPTOPP_STATIC_CONSTEXPR const char *	StaticAlgorithmName ()

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

void	UpdateByte (byte b)

byte	GetCrcByte (size_t i) const

Public Member Functions inherited from HashTransformation
virtual	~HashTransformation ()

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

virtual byte *	CreateUpdateSpace (size_t &size)
	Request space which can be written into by the caller. More...

virtual void	Final (byte *digest)
	Computes the hash of the current message. More...

virtual void	Restart ()
	Restart the hash. More...

unsigned int	TagSize () const
	Provides the tag size of the hash. More...

virtual unsigned int	BlockSize () const
	Provides the block size of the compression function. More...

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

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

virtual void	CalculateDigest (byte digest, const byte input, size_t length)
	Updates the hash with additional input and computes the hash of the current message. More...

virtual bool	Verify (const byte *digest)
	Verifies the hash of the current message. More...

virtual bool	VerifyDigest (const byte digest, const byte input, size_t length)
	Updates the hash with additional input and verifies the hash of the current message. More...

virtual void	CalculateTruncatedDigest (byte digest, size_t digestSize, const byte input, size_t length)
	Updates the hash with additional input and computes the hash of the current message. More...

virtual bool	TruncatedVerify (const byte *digest, size_t digestLength)
	Verifies the hash of the current message. More...

virtual bool	VerifyTruncatedDigest (const byte digest, size_t digestLength, const byte input, size_t length)
	Updates the hash with additional input and verifies the hash of the current message. 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...

Protected Member Functions
void	Reset ()

Protected Member Functions inherited from HashTransformation
void	ThrowIfInvalidTruncatedSize (size_t size) const
	Validates a truncated digest size. More...

Private Attributes
word32	m_crc

Static Private Attributes
static const word32	m_tab [256]

Detailed Description

CRC-32 Checksum Calculation.

Uses CRC polynomial 0xEDB88320

Definition at line 26 of file crc.h.

Constructor & Destructor Documentation

CRC32::CRC32 ( )

Definition at line 127 of file crc.cpp.

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Member Function Documentation

std::string CRC32::AlgorithmName ( ) const

inlinevirtual

Provides the name of this algorithm.

Returns: the standard algorithm name

The standard algorithm name can be a name like AES or AES/GCM. Some algorithms do not have standard names yet. For example, there is no standard algorithm name for Shoup's ECIES.

Note: AlgorithmName is not universally implemented yet

Reimplemented from Algorithm.

Definition at line 35 of file crc.h.

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unsigned int CRC32::DigestSize ( ) const

inlinevirtual

Provides the digest size of the hash.

Returns: the digest size of the hash.

Implements HashTransformation.

Definition at line 33 of file crc.h.

byte CRC32::GetCrcByte ( size_t i ) const

inline

Definition at line 38 of file crc.h.

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void CRC32::Reset ( )

inlineprotected

Definition at line 41 of file crc.h.

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CRYPTOPP_STATIC_CONSTEXPR const char* CRC32::StaticAlgorithmName ( )

inline

Definition at line 34 of file crc.h.

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void CRC32::TruncatedFinal	(	byte *	digest,
		size_t	digestSize
	)

virtual

Computes the hash of the current message.

Parameters

digest	a pointer to the buffer to receive the hash
digestSize	the size of the truncated digest, in bytes

TruncatedFinal() call Final() and then copies digestSize bytes to digest. The hash is restarted the hash for the next message.

Implements HashTransformation.

Definition at line 172 of file crc.cpp.

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void CRC32::Update	(	const byte *	input,
		size_t	length
	)

virtual

Updates a hash with additional input.

Parameters

input	the additional input as a buffer
length	the size of the buffer, in bytes

Implements HashTransformation.

Definition at line 132 of file crc.cpp.

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void CRC32::UpdateByte ( byte b )

inline

Definition at line 37 of file crc.h.

Member Data Documentation

word32 CRC32::m_crc

private

Definition at line 45 of file crc.h.

const word32 CRC32::m_tab

staticprivate

Definition at line 44 of file crc.h.

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

src/cryptopp/crc.h
src/cryptopp/crc.cpp

Public Member Functions

Protected Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation