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TF_VerifierBase Class Reference

#include <pubkey.h>

Inheritance diagram for TF_VerifierBase:

TF_SignatureSchemeBase< PK_Verifier, TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > > PK_Verifier TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > PK_SignatureScheme PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

Definition at line 329 of file pubkey.h.

Public Member Functions

void InputSignature (PK_MessageAccumulator &messageAccumulator, const byte *signature, unsigned int 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 &recoveryAccumulator) const
 recover a message from its signature

unsigned int SignatureLength () const
 signature length if it only depends on the key, otherwise 0

unsigned int MaxRecoverableLength () const
 length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery

unsigned int MaxRecoverableLengthFromSignatureLength (unsigned int signatureLength) const
 length of longest message that can be recovered from a signature of given length, or 0 if this signature scheme does not support message recovery

bool IsProbabilistic () const
 requires a random number generator to sign

bool AllowNonrecoverablePart () const
 whether or not a non-recoverable message part can be signed

bool RecoverablePartFirst () const
 whether you must input the recoverable part before the non-recoverable part during signing

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, unsigned int messageLen, const byte *signature, unsigned int 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

virtual DecodingResult RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, unsigned int nonrecoverableMessageLength, const byte *signature, unsigned int signatureLength) const
 recover a message from its signature

virtual unsigned int MaxSignatureLength (unsigned int 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 TrapdoorFunction TrapdoorFunctionInterface
typedef PK_SignatureMessageEncodingMethod MessageEncodingInterface

Protected Member Functions

unsigned int MessageRepresentativeLength () const
unsigned int MessageRepresentativeBitLength () const
virtual HashIdentifier GetHashIdentifier () const =0
virtual unsigned int GetDigestSize () const =0
virtual const TrapdoorFunctionBoundsGetTrapdoorFunctionBounds () const =0
virtual const TrapdoorFunctionInterface & GetTrapdoorFunctionInterface () const =0
virtual const MessageEncodingInterface & GetMessageEncodingInterface () const =0


Member Function Documentation

DecodingResult TF_VerifierBase::RecoverAndRestart byte *  recoveredMessage,
PK_MessageAccumulator recoveryAccumulator
const [virtual]
 

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 93 of file pubkey.cpp.

bool TF_SignatureSchemeBase< PK_Verifier , TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > >::IsProbabilistic  )  const [inline, virtual, inherited]
 

Implements PK_SignatureScheme.

Definition at line 306 of file pubkey.h.

DecodingResult PK_Verifier::Recover byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator
const [virtual, inherited]
 

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Definition at line 653 of file cryptlib.cpp.

References PK_Verifier::RecoverAndRestart().

DecodingResult PK_Verifier::RecoverMessage byte *  recoveredMessage,
const byte *  nonrecoverableMessage,
unsigned int  nonrecoverableMessageLength,
const byte *  signature,
unsigned int  signatureLength
const [virtual, inherited]
 

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Definition at line 659 of file cryptlib.cpp.

References PK_Verifier::InputSignature(), PK_Verifier::NewVerificationAccumulator(), and PK_Verifier::RecoverAndRestart().


The documentation for this class was generated from the following files:
Generated on Sun Mar 14 20:44:42 2004 for Crypto++ by doxygen 1.3.6-20040222