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NRDigestVerifier Class Reference

Nyberg-Rueppel Digest Verifier. More...

#include <nr.h>

Inheritance diagram for NRDigestVerifier:

List of all members.

Public Methods
	NRDigestVerifier (const Integer &p,const Integer &q,const Integer &g,const Integer &y)
	NRDigestVerifier (BufferedTransformation &bt)
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	DEREncode (BufferedTransformation &bt)const
bool	VerifyDigest (const byte *digest,unsigned int digestLen,const byte *signature)const
unsigned int	MaxDigestLength ()const
unsigned int	DigestSignatureLength ()const
const Integer&	GetModulus ()const
const Integer&	GetSubgroupSize ()const
const Integer&	GetGenerator ()const
const Integer&	GetPublicResidue ()const
Protected Methods
	NRDigestVerifier ()
bool	RawVerify (const Integer &m,const Integer &a,const Integer &b)const
unsigned int	ExponentBitLength ()const
Integer	EncodeDigest (const byte *digest,unsigned int digestLen)const
Protected Attributes
Integer	m_p
Integer	m_q
Integer	m_g
Integer	m_y
ModExpPrecomputation	m_gpc
ModExpPrecomputation	m_ypc

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Detailed Description

Nyberg-Rueppel Digest Verifier.

Definition at line 15 of file nr.h.

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Constructor & Destructor Documentation

NRDigestVerifier::NRDigestVerifier ( const Integer & p, const Integer & q, const Integer & g, const Integer & y )

Definition at line 23 of file nr.cpp.

NRDigestVerifier::NRDigestVerifier ( BufferedTransformation & bt )

Definition at line 58 of file nr.cpp.

NRDigestVerifier::NRDigestVerifier ( ) [inline, protected]

Definition at line 37 of file nr.h.

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Member Function Documentation

void NRDigestVerifier::DEREncode ( BufferedTransformation & bt ) const

Definition at line 71 of file nr.cpp.

unsigned int NRDigestVerifier::DigestSignatureLength ( ) const [inline]

Definition at line 29 of file nr.h.

Integer NRDigestVerifier::EncodeDigest ( const byte * digest, unsigned int digestLen ) const [protected]

Definition at line 48 of file nr.cpp.

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

Definition at line 53 of file nr.cpp.

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

Definition at line 33 of file nr.h.

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

Definition at line 31 of file nr.h.

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

Definition at line 34 of file nr.h.

const Integer & NRDigestVerifier::GetSubgroupSize ( ) const [inline]

Definition at line 32 of file nr.h.

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

retrieve previously saved precomputation. Reimplemented from PK_Precomputation. Definition at line 36 of file nr.cpp.

unsigned int NRDigestVerifier::MaxDigestLength ( ) const [inline]

Definition at line 28 of file nr.h.

void NRDigestVerifier::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 30 of file nr.cpp.

bool NRDigestVerifier::RawVerify ( const Integer & m, const Integer & r, const Integer & s ) const [protected]

Definition at line 92 of file nr.cpp.

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

save precomputation for later use. Reimplemented from PK_Precomputation. Definition at line 42 of file nr.cpp.

bool NRDigestVerifier::VerifyDigest ( const byte * digest, unsigned int digestLen, const byte * signature ) const

Definition at line 81 of file nr.cpp.

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Member Data Documentation

Integer NRDigestVerifier::m_g [protected]

Definition at line 42 of file nr.h.

ModExpPrecomputation NRDigestVerifier::m_gpc [protected]

Definition at line 43 of file nr.h.

Integer NRDigestVerifier::m_p [protected]

Definition at line 42 of file nr.h.

Integer NRDigestVerifier::m_q [protected]

Definition at line 42 of file nr.h.

Integer NRDigestVerifier::m_y [protected]

Definition at line 42 of file nr.h.

ModExpPrecomputation NRDigestVerifier::m_ypc [protected]

Definition at line 43 of file nr.h.

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

• nr.h
• nr.cpp

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