Public Types | Public Member Functions | Static Public Member Functions | Protected Types | Protected Member Functions

DL_VerifierImpl< SCHEME_OPTIONS > Class Template Reference

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#include <pubkey.h>

Inheritance diagram for DL_VerifierImpl< SCHEME_OPTIONS >:
DL_ObjectImpl< DL_VerifierBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > 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.

Public Types

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

Public Member Functions

PK_MessageAccumulatorNewVerificationAccumulator () const
PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
virtual PublicKeyAccessPublicKey ()=0
const SCHEME_OPTIONS::PublicKey & GetKey () const
SCHEME_OPTIONS::PublicKey & AccessKey ()
std::string AlgorithmName () const
virtual 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
virtual void InputSignature (PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const =0
 input signature into a message accumulator
bool VerifyAndRestart (PK_MessageAccumulator &messageAccumulator) const
virtual bool VerifyAndRestart (PK_MessageAccumulator &messageAccumulator) const =0
 check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator
DecodingResult RecoverAndRestart (byte *recoveredMessage, PK_MessageAccumulator &messageAccumulator) const
virtual DecodingResult RecoverAndRestart (byte *recoveredMessage, PK_MessageAccumulator &messageAccumulator) const =0
 recover a message from its signature
size_t SignatureLength () const
virtual size_t SignatureLength () const =0
 signature length if it only depends on the key, otherwise 0
size_t MaxRecoverableLength () const
virtual size_t MaxRecoverableLength () const =0
 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
virtual size_t MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const =0
 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
virtual bool IsProbabilistic () const =0
 requires a random number generator to sign
bool AllowNonrecoverablePart () const
virtual bool AllowNonrecoverablePart () const =0
 whether or not a non-recoverable message part can be signed
bool RecoverablePartFirst () const
virtual bool RecoverablePartFirst () const =0
 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, 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
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

static 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_SymmetricEncryptionAlgorithm
GetSymmetricEncryptionAlgorithm () const
HashIdentifier GetHashIdentifier () const
const
PK_SignatureMessageEncodingMethod
GetMessageEncodingInterface () const
DL_VerifierBase
< SCHEME_OPTIONS::Element >
::KeyInterface
AccessKeyInterface ()
const DL_VerifierBase
< SCHEME_OPTIONS::Element >
::KeyInterface
GetKeyInterface () const
size_t GetDigestSize () const
size_t MessageRepresentativeLength () const
size_t MessageRepresentativeBitLength () const
const DL_GroupParameters
< Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()

Detailed Description

template<class SCHEME_OPTIONS>
class DL_VerifierImpl< SCHEME_OPTIONS >

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Definition at line 1351 of file pubkey.h.


Member Function Documentation

virtual DecodingResult PK_Verifier::RecoverAndRestart ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const [pure virtual, inherited]

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Referenced by PK_Verifier::Recover(), and PK_Verifier::RecoverMessage().

virtual bool PK_SignatureScheme::IsProbabilistic (  )  const [pure virtual, inherited]

requires a random number generator to sign

if this returns false, NullRNG() can be passed to functions that take RandomNumberGenerator &

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 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 [virtual, inherited]

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: