DL_VerifierBase< T > Class Template Reference

Discret Log (DL) Verifier base class. More...

#include <pubkey.h>

Inheritance diagram for DL_VerifierBase< T >:

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.
Public Member Functions inherited from DL_SignatureSchemeBase< PK_Verifier, DL_PublicKey< T > >
size_t	SignatureLength () const
	Provides the signature length.
size_t	MaxRecoverableLength () const
	Provides the maximum recoverable length.
size_t	MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const
	Provides the maximum recoverable length.
bool	IsProbabilistic () const
	Determines if the scheme is probabilistic.
bool	AllowNonrecoverablePart () const
	Determines if the scheme has non-recoverable part.
bool	RecoverablePartFirst () const
	Determines if the scheme allows recoverable part first.
Public Member Functions inherited from PK_Verifier
virtual PK_MessageAccumulator *	NewVerificationAccumulator () 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.
virtual bool	VerifyMessage (const byte *message, size_t messageLen, const byte *signature, size_t signatureLen) 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.
virtual DecodingResult	RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, const byte *signature, size_t signatureLength) const
	Recover a message from its signature.
Public Member Functions inherited from PK_SignatureScheme
virtual size_t	MaxSignatureLength (size_t recoverablePartLength=0) const
	Provides the maximum signature length produced given the length of the recoverable message part.
virtual bool	SignatureUpfront () const
	Determines whether the signature must be input before the message.
Public Member Functions inherited from PublicKeyAlgorithm
CryptoMaterial &	AccessMaterial ()
	Retrieves a reference to a Public Key.
const CryptoMaterial &	GetMaterial () const
	Retrieves a reference to a Public Key.
virtual PublicKey &	AccessPublicKey ()=0
	Retrieves a reference to a Public Key.
virtual const PublicKey &	GetPublicKey () const
	Retrieves a reference to a Public Key.
Public Member Functions inherited from Algorithm
	Algorithm (bool checkSelfTestStatus=true)
	Interface for all crypto algorithms.
virtual std::string	AlgorithmName () const
	Provides the name of this algorithm.
virtual std::string	AlgorithmProvider () const
	Retrieve the provider of this algorithm.
Public Member Functions inherited from Clonable
virtual Clonable *	Clone () const
	Copies this object.

Detailed Description

template<class T>
class DL_VerifierBase< T >

Discret Log (DL) Verifier base class.

Template Parameters

T	Field element type or class

Field element T can be Integer, ECP or EC2N.

Definition at line 1718 of file pubkey.h.

Constructor & Destructor Documentation

~DL_VerifierBase()

template<class T >

virtual DL_VerifierBase< T >::~DL_VerifierBase ( )

inlinevirtual

Definition at line 1721 of file pubkey.h.

Member Function Documentation

InputSignature()

template<class T >

void DL_VerifierBase< T >::InputSignature ( PK_MessageAccumulator & messageAccumulator, const byte * signature, size_t signatureLength ) const

inlinevirtual

Input signature into a message accumulator.

Parameters

messageAccumulator	a pointer to a PK_MessageAccumulator derived class
signature	the signature on the message
signatureLength	the size of the signature

Implements PK_Verifier.

Definition at line 1723 of file pubkey.h.

VerifyAndRestart()

template<class T >

bool DL_VerifierBase< T >::VerifyAndRestart ( PK_MessageAccumulator & messageAccumulator ) const

inlinevirtual

Check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator.

Parameters

messageAccumulator

a reference to a PK_MessageAccumulator derived class

Returns

true if the signature is valid, false otherwise

VerifyAndRestart() restarts the messageAccumulator

Implements PK_Verifier.

Definition at line 1744 of file pubkey.h.

RecoverAndRestart()

template<class T >

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

inlinevirtual

Recover a message from its signature.

Parameters

recoveredMessage	a pointer to the recoverable message part to be verified
messageAccumulator	a pointer to a PK_MessageAccumulator derived class

Returns

the result of the verification operation

RecoverAndRestart() restarts the messageAccumulator

Precondition

COUNTOF(recoveredMessage) == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 1764 of file pubkey.h.

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

• pubkey.h