CRSAPKCS1v15Decryptor Class Reference

#include <asymmetric.h>

class CRSAPKCS1v15Decryptor : public CDecryptor

Inherits from

CRSAPKCS1v15Decryptor
- CDecryptor
  - CBase
  - MCryptoSystem

Protected Attributes
CPaddingPKCS1Encryption *	iPadding
const CRSAPrivateKey &	iPrivateKey

Public Member Functions
virtual	~CRSAPKCS1v15Decryptor(void)
virtual void	DecryptL(const TDesC8 &, TDes8 &)
virtual TInt	MaxInputLength(void)
virtual TInt	MaxOutputLength(void)
IMPORT_C CRSAPKCS1v15Decryptor *	NewL(const CRSAPrivateKey &)
IMPORT_C CRSAPKCS1v15Decryptor *	NewLC(const CRSAPrivateKey &)

Protected Member Functions
	CRSAPKCS1v15Decryptor(const CRSAPrivateKey &)
void	ConstructL(void)

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()
	CDecryptor::CDecryptor(void)
	MCryptoSystem::MCryptoSystem(void)

Detailed Description

Implementation of RSA decryption as described in PKCS#1 v1.5.

Member Attribute Documentation

iPadding

CPaddingPKCS1Encryption *

iPadding

[protected]

The PKCS#1 v1.5 encryption padding

iPrivateKey

const CRSAPrivateKey &

iPrivateKey

[protected]

The RSA private key

Constructor & Destructor Documentation

CRSAPKCS1v15Decryptor ( const CRSAPrivateKey & )

CRSAPKCS1v15Decryptor

(

const CRSAPrivateKey &

aKey

)

[protected]

~CRSAPKCS1v15Decryptor ( void )

~CRSAPKCS1v15Decryptor

(

void

)

[virtual]

The destructor frees all resources owned by the object, prior to its destruction.

Member Function Documentation

ConstructL ( void )

void

ConstructL

(

void

)

[protected]

DecryptL ( const TDesC8 &, TDes8 & )

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

Reimplemented from CDecryptor::DecryptL(const TDesC8 &,TDes8 &)const

Decrypts the specified ciphertext into plaintext

Parameters
aInput	The ciphertext to be decrypted
aOutput	On return, the plaintext

Panic Codes
KCryptoPanic	If the input data is too long. See ECryptoPanicInputTooLarge
KCryptoPanic	If the supplied output descriptor is not large enough to store the result. See ECryptoPanicOutputDescriptorOverflow

MaxInputLength ( void )

TInt

MaxInputLength

(

void

)

const [virtual]

Reimplemented from MCryptoSystem::MaxInputLength(void)const

Gets the maximum size of input accepted by this object.

Return Value: The maximum input length allowed in bytes.

MaxOutputLength ( void )

TInt

MaxOutputLength

(

void

)

const [virtual]

Reimplemented from MCryptoSystem::MaxOutputLength(void)const

Gets the maximum size of output that can be generated by this object.

Return Value: The maximum output length in bytes.

NewL ( const CRSAPrivateKey & )

IMPORT_C CRSAPKCS1v15Decryptor *

NewL

(

const CRSAPrivateKey &

aKey

)

[static]

Creates a new RSA decryptor object using PKCS#1 v1.5 padding.

Parameters
aKey	The RSA private key for decryption

Leave Codes
KErrKeyNotWeakEnough	If the key size is larger than that allowed by the cipher strength restrictions of the crypto library. See
KErrKeySize	If the key length is too small

NewLC ( const CRSAPrivateKey & )

IMPORT_C CRSAPKCS1v15Decryptor *

NewLC

(

const CRSAPrivateKey &

aKey

)

[static]

Creates a new RSA decryptor object using PKCS#1 v1.5 padding

The returned pointer is put onto the cleanup stack.

Parameters
aKey	The RSA private key for decryption

Leave Codes
KErrKeyNotWeakEnough	If the key size is larger than that allowed by the cipher strength restrictions of the crypto library. See
KErrKeySize	If the key length is too small
KErrNotSupported	If the RSA private key is not a supported TRSAPrivateKeyType