PK_Verifier Class Reference

#include <cryptlib.h>

Inheritance diagram for PK_Verifier:

List of all members.

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Detailed Description

interface for public-key signature verifiers

Definition at line 1262 of file cryptlib.h.

Public Member Functions
virtual bool	SignatureUpfrontForVerification () const
virtual HashTransformation *	NewVerificationAccumulator (const byte *signature=NULL) const
	create a new HashTransformation to accumulate the message to be verified
virtual bool	Verify (HashTransformation *messageAccumulator, const byte *signature=NULL) const
	check whether sig is a valid signature for messageAccumulator, and delete messageAccumulator (even in case of exception thrown)
virtual bool	VerifyAndRestart (HashTransformation &messageAccumulator, const byte *signature) const=0
	check whether sig is a valid signature for messageAccumulator, and restart messageAccumulator
virtual void	InitializeVerificationAccumulator (HashTransformation &messageAccumulator, const byte *signature) const
	only useful if SignatureUpfrontForVerification() == true
virtual bool	VerifyMessage (const byte *message, unsigned int messageLen, const byte *signature) const
	check whether sig is a valid signature for message
virtual unsigned int	SignatureLength () const=0
	signature length support by this object (as either input or output)
virtual HashTransformation *	NewMessageAccumulator () const=0
	deprecated, please use PK_Signer::NewSignatureAccumulator or PK_Verifier::NewVerificationAccumulator instead
CryptoMaterial &	AccessMaterial ()
	returns a reference to the crypto material used by this object
const CryptoMaterial &	GetMaterial () const
	returns a const reference to the crypto material used by this object
virtual PublicKey &	AccessPublicKey ()=0
virtual const PublicKey &	GetPublicKey () 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 Clonable *	Clone () const
	this is not implemented by most classes yet

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Member Function Documentation

virtual bool PK_Verifier::SignatureUpfrontForVerification (   )  const [inline, virtual]

If this function returns true, you must input the signature when calling NewVerificationAccumulator(). Otherwise, you must input the signature when calling Verify(). Definition at line 1268 of file cryptlib.h.

virtual HashTransformation* PK_Verifier::NewVerificationAccumulator (  const byte *  signature = NULL  )  const [inline, virtual]

create a new HashTransformation to accumulate the message to be verified Parameters: signature  is ignored if SignatureUpfrontForVerification() == false signature  may be NULL to indicate that the signature is not available yet Definition at line 1274 of file cryptlib.h. References PK_SignatureScheme::NewMessageAccumulator(). Referenced by VerifyMessage().

bool PK_Verifier::Verify (  HashTransformation *  messageAccumulator, const byte *  signature = NULL )  const [virtual]

check whether sig is a valid signature for messageAccumulator, and delete messageAccumulator (even in case of exception thrown) Precondition: messageAccumulator was obtained by calling NewVerificationAccumulator() HashTransformation::Final() has not been called on messageAccumulator length of signature == SignatureLength() Parameters: signature  is ignored if SignatureUpfrontForVerification() == true Definition at line 632 of file cryptlib.cpp. References VerifyAndRestart().

virtual bool PK_Verifier::VerifyAndRestart (  HashTransformation &  messageAccumulator, const byte *  signature )  const [pure virtual]

check whether sig is a valid signature for messageAccumulator, and restart messageAccumulator Note: depending on SignatureUpfrontForVerification(), signature is either the current or the next signature Parameters: signature  may be NULL to indicate that the next signature is not available yet Implemented in PK_VerifierBase< H >, and VerifierWithRecoveryTemplate< TF, H >. Referenced by Verify(), and VerifyMessage().

bool PK_Verifier::VerifyMessage (  const byte *  message, unsigned int  messageLen, const byte *  signature )  const [virtual]

check whether sig is a valid signature for message Precondition: size of signature == SignatureLength() Definition at line 638 of file cryptlib.cpp. References NewVerificationAccumulator(), and VerifyAndRestart().

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

• cryptlib.h
• cryptlib.cpp

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