CRSAPKCS1v15Verifier Class Reference

#include <asymmetric.h>

class CRSAPKCS1v15Verifier : public CRSAVerifier

Inherits from

Protected Attributes
CPaddingPKCS1Signature *iPadding
const CRSAPublicKey &iPublicKey
Public Member Functions
virtual ~CRSAPKCS1v15Verifier(void)
virtual HBufC8 *InverseSignLC(const CRSASignature &)
virtual TInt MaxInputLength(void)
virtual TInt MaxOutputLength(void)
IMPORT_C CRSAPKCS1v15Verifier *NewL(const CRSAPublicKey &)
IMPORT_C CRSAPKCS1v15Verifier *NewLC(const CRSAPublicKey &)
Protected Member Functions
CRSAPKCS1v15Verifier(const CRSAPublicKey &)
voidConstructL(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()
CRSAVerifier::CRSAVerifier(void)
CRSAVerifier::VerifyL(const TDesC8 &,const CRSASignature &)const
CVerifier< CRSASignature >::CVerifier(void)

Detailed Description

This class verifies RSA signatures given a message and its supposed signature. It follows the RSA PKCS#1 v1.5 with PKCS#1 v1.5 padding specification with the following exception: the VerifyL() function does not hash or in any way manipulate the input data before checking. Thus in order to verify RSA signatures in PKCS#1 v1.5 format, the input data needs to follow PKCS#1 v1.5 specification, i.e. be ASN.1 encoded and prefixed by ASN.1 encoded digestId.

Member Attribute Documentation

iPadding

CPaddingPKCS1Signature *iPadding[protected]

The PKCS#1 v1.5 signature padding

iPublicKey

const CRSAPublicKey &iPublicKey[protected]

The RSA public key to be used for verification

Constructor & Destructor Documentation

CRSAPKCS1v15Verifier ( const CRSAPublicKey & )

CRSAPKCS1v15Verifier(const CRSAPublicKey &aKey)[protected]

~CRSAPKCS1v15Verifier ( void )

~CRSAPKCS1v15Verifier(void)[virtual]

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

Member Function Documentation

ConstructL ( void )

voidConstructL(void)[protected]

InverseSignLC ( const CRSASignature & )

HBufC8 *InverseSignLC(const CRSASignature &aSignature)const [virtual]

Performs a decryption operation on a signature using the public key.

This is the inverse of the sign operation, which performs a encryption operation on its input data using the private key. Although this can be used to verify signatures, CRSAVerifier::VerifyL should be used in preference. This method is however required by some security protocols.

ParameterDescription
aSignatureThe signature to be verified

Returns: A pointer to a new buffer containing the result of the operation. The pointer is left on the cleanup stack.

MaxInputLength ( void )

TInt MaxInputLength(void)const [virtual]

MaxOutputLength ( void )

TInt MaxOutputLength(void)const [virtual]

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

Returns: The maximum output length in bytes

NewL ( const CRSAPublicKey & )

IMPORT_C CRSAPKCS1v15Verifier *NewL(const CRSAPublicKey &aKey)[static]

Creates a new CRSAPKCS1v15Verifier object from a specified RSA public key.

leave
KErrKeySize If the key length is too small
ParameterDescription
aKeyThe RSA public key to be used for verifying

Returns: A pointer to the new CRSAPKCS1v15Verifier object

NewLC ( const CRSAPublicKey & )

IMPORT_C CRSAPKCS1v15Verifier *NewLC(const CRSAPublicKey &aKey)[static]

Creates a new CRSAPKCS1v15Verifier object from a specified RSA public key.

The returned pointer is put onto the cleanup stack.

leave
KErrKeySize If the key length is too small
ParameterDescription
aKeyThe RSA public key to be used for verifying

Returns: A pointer to the new CRSAPKCS1v15Verifier object

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