LUCFunction Class Reference

#include <luc.h>

Inheritance diagram for LUCFunction:

List of all members.

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Detailed Description

The LUC function.

This class is here for historical and pedagogical interest. It has no practical advantages over other trapdoor functions and probably shouldn't be used in production software. The discrete log based LUC schemes defined later in this .h file may be of more practical interest.

Definition at line 22 of file luc.h.

Public Member Functions
void	Initialize (const Integer &n, const Integer &e)
void	BERDecode (BufferedTransformation &bt)
void	DEREncode (BufferedTransformation &bt) const
Integer	ApplyFunction (const Integer &x) const
Integer	PreimageBound () const
Integer	ImageBound () const
bool	Validate (RandomNumberGenerator &rng, unsigned int level) const
	check this object for errors
bool	GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const
	to be implemented by derived classes, users should use one of the above functions instead
void	AssignFrom (const NameValuePairs &source)
	assign values from source to this object
const Integer &	GetModulus () const
const Integer &	GetPublicExponent () const
void	SetModulus (const Integer &n)
void	SetPublicExponent (const Integer &e)
Integer	ApplyRandomizedFunction (RandomNumberGenerator &rng, const Integer &x) const
bool	IsRandomized () const
virtual Integer	MaxPreimage () const
virtual Integer	MaxImage () const
Protected Attributes
Integer	m_n
Integer	m_e

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Member Function Documentation

bool LUCFunction::Validate	(	RandomNumberGenerator &	rng,
		unsigned int	level
	)			const [virtual]

check this object for errors

Parameters:

level

denotes the level of thoroughness: 0 - using this object won't cause a crash or exception (rng is ignored) 1 - this object will probably function (encrypt, sign, etc.) correctly (but may not check for weak keys and such) 2 - make sure this object will function correctly, and do reasonable security checks 3 - do checks that may take a long time

Returns:

true if the tests pass

Implements CryptoMaterial.

Reimplemented in InvertibleLUCFunction.

Definition at line 69 of file luc.cpp.

References Integer::IsOdd(), m_e, m_n, and Integer::One().

Referenced by InvertibleLUCFunction::Validate().

void LUCFunction::AssignFrom

(

const NameValuePairs &

source

)

[virtual]

assign values from source to this object

Note:

This function can be used to create a public key from a private key.

Implements CryptoMaterial.

Reimplemented in InvertibleLUCFunction.

Definition at line 85 of file luc.cpp.

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

• luc.h
• luc.cpp

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