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DL_VerifierImpl< SCHEME_OPTIONS > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_VerifierImpl< SCHEME_OPTIONS >:

DL_PublicObjectImpl< DL_VerifierBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS > DL_ObjectImpl< DL_VerifierBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > PublicKeyCopier< SCHEME_OPTIONS > DL_ObjectImplBase< DL_VerifierBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > AlgorithmImpl< DL_VerifierBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo > DL_VerifierBase< SCHEME_OPTIONS::Element > DL_SignatureSchemeBase< PK_Verifier, DL_PublicKey< SCHEME_OPTIONS::Element > > PK_Verifier DL_Base< DL_PublicKey< SCHEME_OPTIONS::Element > > PK_SignatureScheme PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class SCHEME_OPTIONS>
class DL_VerifierImpl< SCHEME_OPTIONS >

_

Definition at line 1375 of file pubkey.h.

Public Types

typedef SCHEME_OPTIONS::PublicKey::Element Element
typedef SCHEME_OPTIONS SchemeOptions
typedef SCHEME_OPTIONS::PublicKey KeyClass

Public Member Functions

PK_MessageAccumulatorNewVerificationAccumulator () const
 create a new HashTransformation to accumulate the message to be verified
void CopyKeyInto (typename SCHEME_OPTIONS::PublicKey &key) const
PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
const SCHEME_OPTIONS::PublicKey & GetKey () const
SCHEME_OPTIONS::PublicKey & AccessKey ()
std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
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 &messageAccumulator) 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 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 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 ClonableClone () const
 this is not implemented by most classes yet

Static Public Member Functions

std::string StaticAlgorithmName ()

Protected Types

typedef DL_PublicKey< SCHEME_OPTIONS::Element > KeyInterface

Protected Member Functions

const DL_ElgamalLikeSignatureAlgorithm<
Element > & 
GetSignatureAlgorithm () const
const DL_KeyAgreementAlgorithm<
Element > & 
GetKeyAgreementAlgorithm () const
const DL_KeyDerivationAlgorithm<
Element > & 
GetKeyDerivationAlgorithm () const
const DL_SymmetricEncryptionAlgorithmGetSymmetricEncryptionAlgorithm () const
HashIdentifier GetHashIdentifier () const
const PK_SignatureMessageEncodingMethodGetMessageEncodingInterface () const
DL_VerifierBase< SCHEME_OPTIONS::Element
>::KeyInterface & 
AccessKeyInterface ()
const DL_VerifierBase< SCHEME_OPTIONS::Element
>::KeyInterface & 
GetKeyInterface () const
unsigned int GetDigestSize () const
unsigned int MessageRepresentativeLength () const
unsigned int MessageRepresentativeBitLength () const
const DL_GroupParameters<
Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()


Member Function Documentation

DecodingResult DL_VerifierBase< SCHEME_OPTIONS::Element >::RecoverAndRestart byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator
const [inline, virtual, inherited]
 

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 1123 of file pubkey.h.

References Integer::Encode(), DL_GroupParameters< T >::GetEncodedElementSize(), and DL_ElgamalLikeSignatureAlgorithm< T >::RecoverPresignature().

bool DL_SignatureSchemeBase< PK_Verifier , DL_PublicKey< SCHEME_OPTIONS::Element > >::IsProbabilistic  )  const [inline, virtual, inherited]
 

Implements PK_SignatureScheme.

Definition at line 995 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 651 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 657 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:
Generated on Wed Nov 17 21:26:17 2004 for Crypto++ by  doxygen 1.3.9.1