Crypto++
Public Member Functions | Protected Types | Protected Member Functions | List of all members
DL_VerifierBase< T > Class Template Referenceabstract

_ More...

#include <pubkey.h>

Inheritance diagram for DL_VerifierBase< T >:
DL_SignatureSchemeBase< PK_Verifier, DL_PublicKey< T > > PK_Verifier DL_Base< DL_PublicKey< T > > PK_SignatureScheme PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable

Public Member Functions

void InputSignature (PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const
 input signature into a message accumulator
 
bool VerifyAndRestart (PK_MessageAccumulator &messageAccumulator) const
 check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator
 
DecodingResult RecoverAndRestart (byte *recoveredMessage, PK_MessageAccumulator &messageAccumulator) const
 recover a message from its signature More...
 
size_t SignatureLength () const
 
size_t MaxRecoverableLength () const
 
size_t MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const
 
bool IsProbabilistic () const
 
bool AllowNonrecoverablePart () const
 
bool RecoverablePartFirst () const
 
virtual PK_MessageAccumulatorNewVerificationAccumulator () const =0
 create a new HashTransformation to accumulate the message to be verified
 
virtual bool Verify (PK_MessageAccumulator *messageAccumulator) const
 check whether messageAccumulator contains a valid signature and message, and delete messageAccumulator (even in case of exception thrown)
 
virtual bool VerifyMessage (const byte *message, size_t messageLen, const byte *signature, size_t signatureLength) const
 check whether input signature is a valid signature for input message
 
virtual DecodingResult Recover (byte *recoveredMessage, PK_MessageAccumulator *messageAccumulator) const
 recover a message from its signature More...
 
virtual DecodingResult RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, const byte *signature, size_t signatureLength) const
 recover a message from its signature More...
 
virtual size_t MaxSignatureLength (size_t recoverablePartLength=0) const
 maximum signature length produced for a given length of recoverable message part
 
virtual bool SignatureUpfront () const
 if this function returns true, during verification you must input the signature before the message, otherwise you can input it at anytime */
 
CryptoMaterialAccessMaterial ()
 returns a reference to the crypto material used by this object
 
const CryptoMaterialGetMaterial () const
 returns a const reference to the crypto material used by this object
 
virtual PublicKeyAccessPublicKey ()=0
 
virtual const PublicKeyGetPublicKey () const
 
void BERDecode (BufferedTransformation &bt)
 for backwards compatibility, calls AccessMaterial().Load(bt)
 
void DEREncode (BufferedTransformation &bt) const
 for backwards compatibility, calls GetMaterial().Save(bt)
 
virtual std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
 
virtual ClonableClone () const
 this is not implemented by most classes yet
 

Protected Types

typedef DL_PublicKey< T > KeyInterface
 
typedef DL_PublicKey< T >::Element Element
 

Protected Member Functions

size_t MessageRepresentativeLength () const
 
size_t MessageRepresentativeBitLength () const
 
virtual const
DL_ElgamalLikeSignatureAlgorithm
< typename DL_PublicKey< T >
::Element > & 
GetSignatureAlgorithm () const =0
 
virtual const
PK_SignatureMessageEncodingMethod
GetMessageEncodingInterface () const =0
 
virtual HashIdentifier GetHashIdentifier () const =0
 
virtual size_t GetDigestSize () const =0
 
const DL_GroupParameters
< Element > & 
GetAbstractGroupParameters () const
 
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()
 
virtual KeyInterfaceAccessKeyInterface ()=0
 
virtual const KeyInterfaceGetKeyInterface () const =0
 

Detailed Description

template<class T>
class DL_VerifierBase< T >

_

Definition at line 1083 of file pubkey.h.

Member Function Documentation

template<class T>
DecodingResult DL_VerifierBase< T >::RecoverAndRestart ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const
inlinevirtual

recover a message from its signature

Precondition
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 1119 of file pubkey.h.

virtual DecodingResult PK_Verifier::Recover ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const
virtualinherited

recover a message from its signature

Precondition
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)
virtual DecodingResult PK_Verifier::RecoverMessage ( byte *  recoveredMessage,
const byte *  nonrecoverableMessage,
size_t  nonrecoverableMessageLength,
const byte *  signature,
size_t  signatureLength 
) const
virtualinherited

recover a message from its signature

Precondition
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

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