CZipCrc32Cryptograph Class Reference

#include <ZipCrc32Cryptograph.h>

Inheritance diagram for CZipCrc32Cryptograph:

List of all members.

Public Member Functions
bool	CanHandle (int iEncryptionMethod)
void	Decode (char *pBuffer, DWORD uSize)
void	Encode (char *pBuffer, DWORD uSize)
bool	InitDecode (CZipAutoBuffer &password, CZipFileHeader &currentFile, CZipStorage &storage, bool ignoreCheck)
void	InitEncode (CZipAutoBuffer &password, CZipFileHeader &currentFile, CZipStorage &storage)
Static Public Member Functions
static const unsigned long *	GetCRCTable ()
static DWORD	GetEncryptedInfoSizeAfterData ()
static DWORD	GetEncryptedInfoSizeBeforeData ()

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Detailed Description

Performs the traditional zip encryption.

See also:

Encryption Methods: How to Best Protect Your Data

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Member Function Documentation

bool CZipCrc32Cryptograph::CanHandle

(

int

iEncryptionMethod )

[inline, virtual]

Returns the value indicating whether the current compressor can handle the given encryption method.

Parameters:

iEncryptionMethod

The encryption method to test. It can be one of the EncryptionMethod values.

Returns:

true, if the current compressor can handle the given encryption method; false otherwise.

Reimplemented from CZipCryptograph.

void CZipCrc32Cryptograph::Decode	(	char *	pBuffer,
		DWORD	uSize
	)		[inline, virtual]

Decodes the given data.

Parameters:

pBuffer	The buffer that holds the data to decode and that receives the results.
uSize	The size of pBuffer.

Implements CZipCryptograph.

void CZipCrc32Cryptograph::Encode	(	char *	pBuffer,
		DWORD	uSize
	)		[inline, virtual]

Encodes the given data.

Parameters:

pBuffer	The buffer that holds the data to encode and that receives the results.
uSize	The size of pBuffer.

Implements CZipCryptograph.

static const unsigned long* CZipCrc32Cryptograph::GetCRCTable

(

)

[inline, static]

Returns the CRC table.

static DWORD CZipCrc32Cryptograph::GetEncryptedInfoSizeAfterData

(

)

[inline, static]

See CZipCryptograph::GetEncryptedInfoSizeAfterData

static DWORD CZipCrc32Cryptograph::GetEncryptedInfoSizeBeforeData

(

)

[inline, static]

See CZipCryptograph::GetEncryptedInfoSizeBeforeData

bool CZipCrc32Cryptograph::InitDecode	(	CZipAutoBuffer &	password,
		CZipFileHeader &	currentFile,
		CZipStorage &	storage,
		bool	ignoreCheck
	)		[virtual]

The method called when an existing file is opened for extraction.

Parameters:

password	The supplied password with the CZipArchive::SetPassword method.
currentFile	The file being decoded and extracted.
storage	The current CZipStorage.
ignoreCheck	If true, skips control bytes verifications.

Returns:

true, if the password is initially considered correct; false otherwise.

Implements CZipCryptograph.

void CZipCrc32Cryptograph::InitEncode	(	CZipAutoBuffer &	password,
		CZipFileHeader &	currentFile,
		CZipStorage &	storage
	)		[virtual]

The method called when a new file is opened for compression.

Parameters:

password	The supplied password with the CZipArchive::SetPassword method.
currentFile	The file being compressed and encoded.
storage	The current CZipStorage.

Implements CZipCryptograph.

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

• ZipCrc32Cryptograph.h