DL_ElgamalLikeSignatureAlgorithm< T > Class Template Reference

Interface for Elgamal-like signature algorithms. More...

Inheritance diagram for DL_ElgamalLikeSignatureAlgorithm< T >:

Public Member Functions
virtual void	Sign (const DL_GroupParameters< T > &params, const Integer &privateKey, const Integer &k, const Integer &e, Integer &r, Integer &s) const =0
	Sign a message using a private key. More...
virtual bool	Verify (const DL_GroupParameters< T > &params, const DL_PublicKey< T > &publicKey, const Integer &e, const Integer &r, const Integer &s) const =0
	Verify a message using a public key. More...
virtual Integer	RecoverPresignature (const DL_GroupParameters< T > &params, const DL_PublicKey< T > &publicKey, const Integer &r, const Integer &s) const
	Recover a Presignature. More...
virtual size_t	RLen (const DL_GroupParameters< T > &params) const
	Retrieve R length. More...
virtual size_t	SLen (const DL_GroupParameters< T > &params) const
	Retrieve S length. More...
virtual bool	IsDeterministic () const
	Signature scheme flag. More...

Detailed Description

template<class T>
class DL_ElgamalLikeSignatureAlgorithm< T >

Interface for Elgamal-like signature algorithms.

Template Parameters

T	Field element type or class

Field element T can be Integer, ECP or EC2N.

Definition at line 1406 of file pubkey.h.

Member Function Documentation

Sign()

template<class T >

virtual void DL_ElgamalLikeSignatureAlgorithm< T >::Sign ( const DL_GroupParameters< T > &  params, const Integer &  privateKey, const Integer &  k, const Integer &  e, Integer &  r, Integer &  s  ) const

pure virtual

Sign a message using a private key.

Parameters

params	GroupParameters
privateKey	private key
k	signing exponent
e	encoded message
r	r part of signature
s	s part of signature

Implemented in DL_Algorithm_NR< T >, DL_Algorithm_GDSA_ISO15946< T >, DL_Algorithm_GDSA< T >, and DL_Algorithm_LUC_HMP.

Verify()

template<class T >

virtual bool DL_ElgamalLikeSignatureAlgorithm< T >::Verify ( const DL_GroupParameters< T > &  params, const DL_PublicKey< T > &  publicKey, const Integer &  e, const Integer &  r, const Integer &  s  ) const

pure virtual

Verify a message using a public key.

Parameters

params	GroupParameters
publicKey	public key
e	encoded message
r	r part of signature
s	s part of signature

Implemented in DL_Algorithm_NR< T >, DL_Algorithm_GDSA_ISO15946< T >, DL_Algorithm_GDSA< T >, and DL_Algorithm_LUC_HMP.

RecoverPresignature()

template<class T >

virtual Integer DL_ElgamalLikeSignatureAlgorithm< T >::RecoverPresignature ( const DL_GroupParameters< T > &  params, const DL_PublicKey< T > &  publicKey, const Integer &  r, const Integer &  s  ) const

inlinevirtual

Recover a Presignature.

Parameters

params	GroupParameters
publicKey	public key
r	r part of signature
s	s part of signature

Definition at line 1433 of file pubkey.h.

RLen()

template<class T >

virtual size_t DL_ElgamalLikeSignatureAlgorithm< T >::RLen ( const DL_GroupParameters< T > &  params ) const

inlinevirtual

Retrieve R length.

Parameters

params

GroupParameters

Reimplemented in DL_Algorithm_LUC_HMP.

Definition at line 1442 of file pubkey.h.

SLen()

template<class T >

virtual size_t DL_ElgamalLikeSignatureAlgorithm< T >::SLen ( const DL_GroupParameters< T > &  params ) const

inlinevirtual

Retrieve S length.

Parameters

params

GroupParameters

Definition at line 1447 of file pubkey.h.

IsDeterministic()

template<class T >

virtual bool DL_ElgamalLikeSignatureAlgorithm< T >::IsDeterministic ( ) const

inlinevirtual

Signature scheme flag.

Returns

true if the signature scheme is deterministic, false otherwise

IsDeterministic() is provided for DL signers. It is used by RFC 6979 signature schemes.

Reimplemented in DL_Algorithm_DSA_RFC6979< T, H >, and DL_Algorithm_DSA_RFC6979< EC::Point, H >.

Definition at line 1453 of file pubkey.h.

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The documentation for this class was generated from the following file:

• pubkey.h