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DL_SignerBase< T > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_SignerBase< T >:

DL_SignatureSchemeBase< PK_Signer, DL_PrivateKey< T > > PK_Signer DL_Base< DL_PrivateKey< T > > PK_SignatureScheme PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class T>
class DL_SignerBase< T >

Definition at line 1021 of file pubkey.h.

Public Member Functions

void RawSign (const Integer &k, const Integer &e, Integer &r, Integer &s) const
void InputRecoverableMessage (PK_MessageAccumulator &messageAccumulator, const byte *recoverableMessage, unsigned int recoverableMessageLength) const
unsigned int SignAndRestart (RandomNumberGenerator &rng, PK_MessageAccumulator &messageAccumulator, byte *signature, bool restart) const
 sign and restart messageAccumulator

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_MessageAccumulatorNewSignatureAccumulator (RandomNumberGenerator &rng=NullRNG()) const =0
 create a new HashTransformation to accumulate the message to be signed

virtual unsigned int Sign (RandomNumberGenerator &rng, PK_MessageAccumulator *messageAccumulator, byte *signature) const
 sign and delete messageAccumulator (even in case of exception thrown)

virtual unsigned int SignMessage (RandomNumberGenerator &rng, const byte *message, unsigned int messageLen, byte *signature) const
 sign a message

virtual unsigned int SignMessageWithRecovery (RandomNumberGenerator &rng, const byte *recoverableMessage, unsigned int recoverableMessageLength, const byte *nonrecoverableMessage, unsigned int nonrecoverableMessageLength, byte *signature) const
 sign a recoverable message

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 PrivateKeyAccessPrivateKey ()=0
virtual const PrivateKeyGetPrivateKey () 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 DL_PrivateKey< T > KeyInterface
typedef DL_PrivateKey< T
>::Element 
Element

Protected Member Functions

void RestartMessageAccumulator (RandomNumberGenerator &rng, PK_MessageAccumulatorBase &ma) const
unsigned int MessageRepresentativeLength () const
unsigned int MessageRepresentativeBitLength () const
virtual const DL_ElgamalLikeSignatureAlgorithm<
typename DL_PrivateKey< T
>::Element > & 
GetSignatureAlgorithm () const=0
virtual const PK_SignatureMessageEncodingMethodGetMessageEncodingInterface () const=0
virtual HashIdentifier GetHashIdentifier () const=0
virtual unsigned int GetDigestSize () const=0
const DL_GroupParameters<
Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()
virtual KeyInterface & AccessKeyInterface ()=0
virtual const KeyInterface & GetKeyInterface () const=0


Member Function Documentation

template<class T>
unsigned int DL_SignerBase< T >::SignAndRestart RandomNumberGenerator rng,
PK_MessageAccumulator messageAccumulator,
byte *  signature,
bool  restart
const [inline, virtual]
 

sign and restart messageAccumulator

Precondition:
size of signature == MaxSignatureLength()
Returns:
actual signature length

Implements PK_Signer.

Definition at line 1045 of file pubkey.h.

References Integer::Decode(), Integer::Encode(), DL_PrivateKey< T >::GetPrivateExponent(), DL_ElgamalLikeSignatureAlgorithm< T >::RLen(), DL_ElgamalLikeSignatureAlgorithm< T >::Sign(), SecBlock< T, A >::size(), and DL_ElgamalLikeSignatureAlgorithm< T >::SLen().

bool DL_SignatureSchemeBase< PK_Signer , DL_PrivateKey< T > >::IsProbabilistic  )  const [inline, virtual, inherited]
 

Implements PK_SignatureScheme.

Definition at line 1002 of file pubkey.h.

unsigned int PK_Signer::Sign RandomNumberGenerator rng,
PK_MessageAccumulator messageAccumulator,
byte *  signature
const [virtual, inherited]
 

sign and delete messageAccumulator (even in case of exception thrown)

Precondition:
size of signature == MaxSignatureLength()
Returns:
actual signature length

Definition at line 617 of file cryptlib.cpp.

References PK_Signer::Sign(), and PK_Signer::SignAndRestart().

Referenced by PK_Signer::Sign().

unsigned int PK_Signer::SignMessage RandomNumberGenerator rng,
const byte *  message,
unsigned int  messageLen,
byte *  signature
const [virtual, inherited]
 

sign a message

Precondition:
size of signature == MaxSignatureLength()
Returns:
actual signature length

Definition at line 623 of file cryptlib.cpp.

References PK_Signer::NewSignatureAccumulator(), PK_Signer::SignAndRestart(), and PK_Signer::SignMessage().

Referenced by PK_Signer::SignMessage().

unsigned int PK_Signer::SignMessageWithRecovery RandomNumberGenerator rng,
const byte *  recoverableMessage,
unsigned int  recoverableMessageLength,
const byte *  nonrecoverableMessage,
unsigned int  nonrecoverableMessageLength,
byte *  signature
const [virtual, inherited]
 

sign a recoverable message

Precondition:
size of signature == MaxSignatureLength(recoverableMessageLength)
Returns:
actual signature length

Definition at line 630 of file cryptlib.cpp.

References PK_Signer::NewSignatureAccumulator(), PK_Signer::SignAndRestart(), and PK_Signer::SignMessageWithRecovery().

Referenced by PK_Signer::SignMessageWithRecovery().


The documentation for this class was generated from the following file:
Generated on Wed Jul 28 08:07:12 2004 for Crypto++ by doxygen 1.3.7