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ElGamalEncryptor Class Reference

ElGamal Encryptor. More...

#include <elgamal.h>

Inheritance diagram for ElGamalEncryptor:

List of all members.

Public Methods
	ElGamalEncryptor (const Integer &p,const Integer &g,const Integer &y)
	ElGamalEncryptor (BufferedTransformation &bt)
void	DEREncode (BufferedTransformation &bt)const
void	Precompute (unsigned int precomputationStorage=16)
void	LoadPrecomputation (BufferedTransformation &storedPrecomputation)
	retrieve previously saved precomputation. More...
void	SavePrecomputation (BufferedTransformation &storedPrecomputation)const
	save precomputation for later use. More...
void	Encrypt (RandomNumberGenerator &rng,const byte *plainText,unsigned int plainTextLength,byte *cipherText)
unsigned int	MaxPlainTextLength ()const
unsigned int	CipherTextLength ()const
void	RawEncrypt (const Integer &k,const Integer &m,Integer &a,Integer &b)const
const Integer&	GetModulus ()const
const Integer&	GetGenerator ()const
const Integer&	GetPublicResidue ()const
const ModExpPrecomputation&	GetGPC ()const
const ModExpPrecomputation&	GetYPC ()const
Protected Methods
	ElGamalEncryptor ()
unsigned int	ExponentBitLength ()const
Protected Attributes
Integer	m_p
Integer	m_g
Integer	m_y
ModExpPrecomputation	m_gpc
ModExpPrecomputation	m_ypc

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Detailed Description

ElGamal Encryptor.

Definition at line 9 of file elgamal.h.

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Constructor & Destructor Documentation

ElGamalEncryptor::ElGamalEncryptor ( const Integer & p, const Integer & g, const Integer & y )

Definition at line 10 of file elgamal.cpp.

ElGamalEncryptor::ElGamalEncryptor ( BufferedTransformation & bt )

Definition at line 15 of file elgamal.cpp.

ElGamalEncryptor::ElGamalEncryptor ( ) [inline, protected]

Definition at line 36 of file elgamal.h.

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Member Function Documentation

unsigned int ElGamalEncryptor::CipherTextLength ( ) const [inline]

Definition at line 24 of file elgamal.h.

void ElGamalEncryptor::DEREncode ( BufferedTransformation & bt ) const

Definition at line 27 of file elgamal.cpp.

void ElGamalEncryptor::Encrypt ( RandomNumberGenerator & rng, const byte * plainText, unsigned int plainTextLength, byte * cipherText )

Definition at line 54 of file elgamal.cpp.

unsigned int ElGamalEncryptor::ExponentBitLength ( ) const [protected]

Definition at line 78 of file elgamal.cpp.

const ModExpPrecomputation & ElGamalEncryptor::GetGPC ( ) const [inline]

Definition at line 32 of file elgamal.h.

const Integer & ElGamalEncryptor::GetGenerator ( ) const [inline]

Definition at line 29 of file elgamal.h.

const Integer & ElGamalEncryptor::GetModulus ( ) const [inline]

Definition at line 28 of file elgamal.h.

const Integer & ElGamalEncryptor::GetPublicResidue ( ) const [inline]

Definition at line 30 of file elgamal.h.

const ModExpPrecomputation & ElGamalEncryptor::GetYPC ( ) const [inline]

Definition at line 33 of file elgamal.h.

void ElGamalEncryptor::LoadPrecomputation ( BufferedTransformation & bt ) [virtual]

retrieve previously saved precomputation. Reimplemented from PK_Precomputation. Definition at line 42 of file elgamal.cpp.

unsigned int ElGamalEncryptor::MaxPlainTextLength ( ) const [inline]

Definition at line 23 of file elgamal.h.

void ElGamalEncryptor::Precompute ( unsigned int precomputationStorage = 16 ) [virtual]

The exact semantics of Precompute() is varies, but typically it means calculate a table of n objects that can be used later to speed up computation. Reimplemented from PK_Precomputation. Definition at line 36 of file elgamal.cpp.

void ElGamalEncryptor::RawEncrypt ( const Integer & k, const Integer & m, Integer & a, Integer & b ) const

Definition at line 72 of file elgamal.cpp.

void ElGamalEncryptor::SavePrecomputation ( BufferedTransformation & bt ) const [virtual]

save precomputation for later use. Reimplemented from PK_Precomputation. Definition at line 48 of file elgamal.cpp.

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Member Data Documentation

Integer ElGamalEncryptor::m_g [protected]

Definition at line 39 of file elgamal.h.

ModExpPrecomputation ElGamalEncryptor::m_gpc [protected]

Definition at line 40 of file elgamal.h.

Integer ElGamalEncryptor::m_p [protected]

Definition at line 39 of file elgamal.h.

Integer ElGamalEncryptor::m_y [protected]

Definition at line 39 of file elgamal.h.

ModExpPrecomputation ElGamalEncryptor::m_ypc [protected]

Definition at line 40 of file elgamal.h.

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

• elgamal.h
• elgamal.cpp

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