CZipCrc32Cryptograph Class Reference

#include <ZipCrc32Cryptograph.h>

Inheritance diagram for CZipCrc32Cryptograph:

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)
Public Member Functions inherited from CZipCryptograph
virtual bool	CanHandle (int ZIP_UNUSED iEncryptionMethod)
virtual void	FinishDecode (CZipFileHeader &ZIP_UNUSED currentFile, CZipStorage &ZIP_UNUSED storage)
virtual void	FinishEncode (CZipFileHeader &ZIP_UNUSED currentFile, CZipStorage &ZIP_UNUSED storage)

Static Public Member Functions
static const z_crc_t *	GetCRCTable ()
static DWORD	GetEncryptedInfoSizeAfterData ()
static DWORD	GetEncryptedInfoSizeBeforeData ()
Static Public Member Functions inherited from CZipCryptograph
static CZipCryptograph *	CreateCryptograph (int iEncryptionMethod)
static DWORD	GetEncryptedInfoSize (int iEncryptionMethod)
static DWORD	GetEncryptedInfoSizeAfterData (int iEncryptionMethod)
static DWORD	GetEncryptedInfoSizeBeforeData (int iEncryptionMethod)
static bool	IsEncryptionSupported (int iEncryptionMethod)
static bool	IsWinZipAesEncryption (int iEncryptionMethod)

Additional Inherited Members
Public Types inherited from CZipCryptograph
enum	EncryptionMethod {   encStandard , encWinZipAes128 , encWinZipAes192 , encWinZipAes256 ,   encNone = 0xFF }

Detailed Description

Performs the traditional zip encryption.

See also

Encryption Methods: How to Best Protect Your Data

Member Function Documentation

CanHandle()

bool CZipCrc32Cryptograph::CanHandle ( int iEncryptionMethod )

inline

Checks if this cryptograph can handle the specified encryption method.

Parameters

iEncryptionMethod

The encryption method to check.

Returns

true if standard CRC32 encryption; false otherwise.

Decode()

void CZipCrc32Cryptograph::Decode ( char * pBuffer, DWORD uSize )

inlinevirtual

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.

Encode()

void CZipCrc32Cryptograph::Encode ( char * pBuffer, DWORD uSize )

inlinevirtual

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.

GetCRCTable()

const z_crc_t * CZipCrc32Cryptograph::GetCRCTable ( )

inlinestatic

Returns the CRC table.

GetEncryptedInfoSizeAfterData()

DWORD CZipCrc32Cryptograph::GetEncryptedInfoSizeAfterData ( )

inlinestatic

See CZipCryptograph::GetEncryptedInfoSizeAfterData

GetEncryptedInfoSizeBeforeData()

DWORD CZipCrc32Cryptograph::GetEncryptedInfoSizeBeforeData ( )

inlinestatic

See CZipCryptograph::GetEncryptedInfoSizeBeforeData

InitDecode()

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.

InitEncode()

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