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CStreamCipher Class Reference

class CStreamCipher : public CSymmetricCipher

Abstract interface class to be implemented by Stream Ciphers.

Inherits from

CStreamCipher
- CSymmetricCipher
  - CBase

Public Member Functions
IMPORT_C TInt	BlockSize (void)
IMPORT_C TInt	MaxFinalOutputLength ( TInt )
IMPORT_C TInt	MaxOutputLength ( TInt )
IMPORT_C void	Process (const TDesC8 &, TDes8 &)
IMPORT_C void	ProcessFinalL (const TDesC8 &, TDes8 &)

Protected Member Functions
IMPORT_C void	DoProcess ( TDes8 &)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()
	CSymmetricCipher::KeySize()const
	CSymmetricCipher::Reset()

Member Functions Documentation

BlockSize(void)

IMPORT_C TInt

BlockSize

(

void

)

const [virtual]

Gets the block size in bytes (always = 1 for stream ciphers).

Parameters

void

DoProcess(TDes8 &)

IMPORT_C void

DoProcess

(

TDes8 &

aData

)

[protected, pure virtual]

DoProcess() pure virtual function, to be implemented by subclasses.

Parameters

TDes8 & aData

On input, text to be processed; on return, processed text.

MaxFinalOutputLength(TInt)

IMPORT_C TInt

MaxFinalOutputLength

(

TInt

aInputLength

)

const [virtual]

Gets as tight an upper bound as possible on the number of bytes that would be returned by a call to ProcessFinalL() with aInputLength bytes of data.

Parameters

TInt aInputLength

The length of data to be supplied to Process() in bytes.

MaxOutputLength(TInt)

IMPORT_C TInt

MaxOutputLength

(

TInt

aInputLength

)

const [virtual]

Gets a tight upper bound on the number of bytes that would be returned by a call to Process() with aInputLength bytes of data.

Parameters

TInt aInputLength

The length of data to be supplied to Process() in bytes.

Process(const TDesC8 &, TDes8 &)

IMPORT_C void	Process	(	const TDesC8 &	aInput,
			TDes8 &	aOutput
		)	[virtual]

Implemented by calling the DoProcess() pure virtual function, to be implemented by subclasses.

Parameters

const TDesC8 & aInput	Input text.
TDes8 & aOutput	Text after processing.

ProcessFinalL(const TDesC8 &, TDes8 &)

IMPORT_C void	ProcessFinalL	(	const TDesC8 &	aInput,
			TDes8 &	aOutput
		)	[virtual]

Implemented by calling the DoProcess() pure virtual function, to be implemented by subclasses.

Parameters

const TDesC8 & aInput	Input text.
TDes8 & aOutput	Text after processing.