Crypto++
Public Types | Public Member Functions | Static Public Member Functions | Protected Types | Protected Member Functions
TF_VerifierImpl< SCHEME_OPTIONS > Class Template Reference

_ More...

#include <pubkey.h>

Inheritance diagram for TF_VerifierImpl< SCHEME_OPTIONS >:
TF_ObjectImpl< TF_VerifierBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > TF_ObjectImplBase< TF_VerifierBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > AlgorithmImpl< TF_VerifierBase, SCHEME_OPTIONS::AlgorithmInfo > 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.

Public Types

typedef SCHEME_OPTIONS::PublicKey KeyClass
typedef SCHEME_OPTIONS SchemeOptions

Public Member Functions

const KeyClass & GetKey () const
KeyClass & AccessKey ()
PublicKeyAccessPublicKey ()
const PublicKeyGetPublicKey () const
PrivateKeyAccessPrivateKey ()
const PrivateKeyGetPrivateKey () const
const KeyClass & GetTrapdoorFunction () const
PK_MessageAccumulatorNewSignatureAccumulator (RandomNumberGenerator &rng) const
PK_MessageAccumulatorNewVerificationAccumulator () const
 create a new HashTransformation to accumulate the message to be verified
std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
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 &recoveryAccumulator) const
 recover a message from its signature
size_t SignatureLength () const
 signature length if it only depends on the key, otherwise 0
size_t MaxRecoverableLength () const
 length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery
size_t MaxRecoverableLengthFromSignatureLength (size_t 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 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
virtual DecodingResult RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, const byte *signature, size_t signatureLength) const
 recover a message from its signature
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
void BERDecode (BufferedTransformation &bt)
 for backwards compatibility, calls AccessMaterial().Load(bt)
void DEREncode (BufferedTransformation &bt) const
 for backwards compatibility, calls GetMaterial().Save(bt)
virtual ClonableClone () const
 this is not implemented by most classes yet

Static Public Member Functions

static std::string StaticAlgorithmName ()

Protected Types

typedef TrapdoorFunction TrapdoorFunctionInterface
typedef
PK_SignatureMessageEncodingMethod 
MessageEncodingInterface

Protected Member Functions

const
TF_VerifierBase::MessageEncodingInterface
GetMessageEncodingInterface () const
const TrapdoorFunctionBoundsGetTrapdoorFunctionBounds () const
const
TF_VerifierBase::TrapdoorFunctionInterface
GetTrapdoorFunctionInterface () const
HashIdentifier GetHashIdentifier () const
size_t GetDigestSize () const
size_t MessageRepresentativeLength () const
size_t MessageRepresentativeBitLength () const

Detailed Description

template<class SCHEME_OPTIONS>
class TF_VerifierImpl< SCHEME_OPTIONS >

_

Definition at line 469 of file pubkey.h.


Member Function Documentation

DecodingResult TF_VerifierBase::RecoverAndRestart ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const
virtualinherited

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 120 of file pubkey.cpp.

References HashTransformation::DigestSize().

bool TF_SignatureSchemeBase< PK_Verifier , TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > >::IsProbabilistic ( ) const
inlinevirtualinherited

Implements PK_SignatureScheme.

Definition at line 320 of file pubkey.h.

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

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Definition at line 792 of file cryptlib.cpp.

References PK_Verifier::RecoverAndRestart().

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)

Definition at line 798 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 file: