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CPBDecryptorSet Class Reference

class CPBDecryptorSet : public CPBDecryptor

Implements the password based decryption of multiple elements.

Since: v7.0s

Inherits from

CPBDecryptorSet
- CPBDecryptor
  - CBase

Public Member Functions
	~CPBDecryptorSet()
TInt	MaxFinalOutputLength(TUint)
TInt	MaxOutputLength(TUint)
IMPORT_C CPBDecryptorSet *	NewL(const TPBECipher, const TDesC8 &)
IMPORT_C CPBDecryptorSet *	NewLC(const TPBECipher, const TDesC8 &)
void	Process(const TDesC8 &, TDes8 &)
void	ProcessFinalL(const TDesC8 &, TDes8 &)
IMPORT_C void	Reset(void)

Protected Member Functions
	CPBDecryptorSet()
void	ConstructL(TPBECipher, const TDesC8 &, const TDesC8 &)

Private Member Functions
TPtrC8	ProcessIV(const TDesC8 &)

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()

Private Attributes
CSymmetricCipher *	iCipher
HBufC8 *	iIVBuf
TBool	iIVSent

Constructor & Destructor Documentation

CPBDecryptorSet()

CPBDecryptorSet

(

)

[protected]

~CPBDecryptorSet()

~CPBDecryptorSet

(

)

[virtual]

Destructor

Member Functions Documentation

ConstructL(TPBECipher, const TDesC8 &, const TDesC8 &)

void	ConstructL	(	TPBECipher	aCipher,
			const TDesC8 &	aKey,
			const TDesC8 &	aIV
		)	[protected]

Parameters

TPBECipher aCipher
const TDesC8 & aKey
const TDesC8 & aIV

MaxFinalOutputLength(TUint)

TInt

MaxFinalOutputLength

(

TUint

aMaxInputLength

)

const [virtual]

Gets the maximum size of the output given a certain input length.

Parameters

TUint aMaxInputLength

The maximum input length in bytes.

MaxOutputLength(TUint)

TInt

MaxOutputLength

(

TUint

aMaxInputLength

)

const [virtual]

Gets the maximum size of the output given a certain input length.

Parameters

TUint aMaxInputLength

The maximum input length in bytes.

NewL(const TPBECipher, const TDesC8 &)

IMPORT_C CPBDecryptorSet *	NewL	(	const TPBECipher	aCipher,
			const TDesC8 &	aKey
		)	[static]

Creates a new CPBDecryptorSet object from the specified cipher and key, and a random IV.

Parameters

const TPBECipher aCipher	The decryption cipher
const TDesC8 & aKey	The decryption key

NewLC(const TPBECipher, const TDesC8 &)

IMPORT_C CPBDecryptorSet *	NewLC	(	const TPBECipher	aCipher,
			const TDesC8 &	aKey
		)	[static]

Creates a new CPBDecryptorSet object from the specified cipher and key, and a random IV.

Puts a pointer to the returned object onto the cleanup stack.

Parameters

const TPBECipher aCipher	The decryption cipher
const TDesC8 & aKey	The decryption key

Process(const TDesC8 &, TDes8 &)

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

Transforms aInput into its decrypted form, aOutput.

aOutput must have CPBDecryptorSet::MaxOutputLength() empty bytes remaining in its length.

Parameters

const TDesC8 & aInput	The ciphertext.
TDes8 & aOutput	The plaintext.

ProcessFinalL(const TDesC8 &, TDes8 &)

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

Transforms aInput into its decrypted form, aOutput, and applies a padding scheme to ensure a block aligned result.

aOutput must have CPBDecryptorSet::MaxFinalOutputLength() empty bytes remaining in its length.

Parameters

const TDesC8 & aInput	The ciphertext.
TDes8 & aOutput	The plaintext.

ProcessIV(const TDesC8 &)

TPtrC8

ProcessIV

(

const TDesC8 &

aInput

)

[private]

Parameters

const TDesC8 & aInput

Reset(void)

IMPORT_C void

Reset

(

void

)

Resets the CPBDecryptorSet object back to its original state and clears all its buffers.

Parameters

void

Member Data Documentation

CSymmetricCipher * iCipher

CSymmetricCipher *

iCipher

[private]

HBufC8 * iIVBuf

HBufC8 *

iIVBuf

[private]

TBool iIVSent

TBool

iIVSent

[private]