ICSharpCode.SharpZipLib.Encryption.ZipAESTransform Class Reference

Transforms stream using AES in CTR mode. More...

Inheritance diagram for ICSharpCode.SharpZipLib.Encryption.ZipAESTransform:

Collaboration diagram for ICSharpCode.SharpZipLib.Encryption.ZipAESTransform:

Public Member Functions
	ZipAESTransform (string key, byte[] saltBytes, int blockSize, bool writeMode)
	Constructor.
int	TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset)
	Implement the ICryptoTransform method.
byte[]	GetAuthCode ()
	Returns the 10 byte AUTH CODE to be checked or appended immediately following the AES data stream.
byte[]	TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
	Not implemented.
void	Dispose ()
	Cleanup internal state.

Properties
byte[]	PwdVerifier [get]
	Returns the 2 byte password verifier.
int	InputBlockSize [get]
	Gets the size of the input data blocks in bytes.
int	OutputBlockSize [get]
	Gets the size of the output data blocks in bytes.
bool	CanTransformMultipleBlocks [get]
	Gets a value indicating whether multiple blocks can be transformed.
bool	CanReuseTransform [get]
	Gets a value indicating whether the current transform can be reused.

Private Attributes
int	_blockSize
ICryptoTransform	_encryptor
readonly byte[]	_counterNonce
byte[]	_encryptBuffer
int	_encrPos
byte[]	_pwdVerifier
HMACSHA1	_hmacsha1
bool	_finalised
bool	_writeMode

Static Private Attributes
const int	PWD_VER_LENGTH = 2
const int	KEY_ROUNDS = 1000
const int	ENCRYPT_BLOCK = 16

Detailed Description

Transforms stream using AES in CTR mode.

Constructor & Destructor Documentation

ZipAESTransform()

ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.ZipAESTransform	(	string	key,
		byte[]	saltBytes,
		int	blockSize,
		bool	writeMode )

Constructor.

Parameters

key	Password string
saltBytes	Random bytes, length depends on encryption strength. 128 bits = 8 bytes, 192 bits = 12 bytes, 256 bits = 16 bytes.
blockSize	The encryption strength, in bytes eg 16 for 128 bits.
writeMode	True when creating a zip, false when reading. For the AuthCode.

Member Function Documentation

Dispose()

void ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.Dispose

(

)

Cleanup internal state.

GetAuthCode()

byte[] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.GetAuthCode

(

)

Returns the 10 byte AUTH CODE to be checked or appended immediately following the AES data stream.

TransformBlock()

int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.TransformBlock	(	byte[]	inputBuffer,
		int	inputOffset,
		int	inputCount,
		byte[]	outputBuffer,
		int	outputOffset )

Implement the ICryptoTransform method.

TransformFinalBlock()

byte[] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.TransformFinalBlock	(	byte[]	inputBuffer,
		int	inputOffset,
		int	inputCount )

Not implemented.

Member Data Documentation

_blockSize

int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._blockSize

private

_counterNonce

readonly byte [] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._counterNonce

private

_encrPos

int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._encrPos

private

_encryptBuffer

byte [] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._encryptBuffer

private

_encryptor

ICryptoTransform ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._encryptor

private

_finalised

bool ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._finalised

private

_hmacsha1

HMACSHA1 ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._hmacsha1

private

_pwdVerifier

byte [] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._pwdVerifier

private

_writeMode

bool ICSharpCode.SharpZipLib.Encryption.ZipAESTransform._writeMode

private

ENCRYPT_BLOCK

const int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.ENCRYPT_BLOCK = 16

staticprivate

KEY_ROUNDS

const int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.KEY_ROUNDS = 1000

staticprivate

PWD_VER_LENGTH

const int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.PWD_VER_LENGTH = 2

staticprivate

Property Documentation

CanReuseTransform

bool ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.CanReuseTransform

get

Gets a value indicating whether the current transform can be reused.

CanTransformMultipleBlocks

bool ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.CanTransformMultipleBlocks

get

Gets a value indicating whether multiple blocks can be transformed.

InputBlockSize

int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.InputBlockSize

get

Gets the size of the input data blocks in bytes.

OutputBlockSize

int ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.OutputBlockSize

get

Gets the size of the output data blocks in bytes.

PwdVerifier

byte [] ICSharpCode.SharpZipLib.Encryption.ZipAESTransform.PwdVerifier

get

Returns the 2 byte password verifier.

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

• ICSharpCode.SharpZLib/Encryption/ZipAESTransform.cs