#include <gfpcrypt.h>

Inheritance diagram for DL_GroupParameters_IntegerBased:

Public Types
typedef Integer	Element
Public Member Functions
void	Initialize (const DL_GroupParameters_IntegerBased &params)
void	Initialize (RandomNumberGenerator &rng, unsigned int pbits)
void	Initialize (const Integer &p, const Integer &g)
void	Initialize (const Integer &p, const Integer &q, const Integer &g)
void	BERDecode (BufferedTransformation &bt)
void	DEREncode (BufferedTransformation &bt) const
void	GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &alg)
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 &	GetSubgroupOrder () const
Integer	GetGroupOrder () const
bool	ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const
bool	ValidateElement (unsigned int level, const Integer &element, const DL_FixedBasePrecomputation< Integer > *precomp) const
bool	FastSubgroupCheckAvailable () const
void	EncodeElement (bool reversible, const Element &element, byte *encoded) const
unsigned int	GetEncodedElementSize (bool reversible) const
Integer	DecodeElement (const byte *encoded, bool checkForGroupMembership) const
Integer	ConvertElementToInteger (const Element &element) const
Integer	GetMaxExponent () const
OID	GetAlgorithmID () const
virtual const Integer &	GetModulus () const =0
virtual void	SetModulusAndSubgroupGenerator (const Integer &p, const Integer &g)=0
void	SetSubgroupOrder (const Integer &q)
void	Save (BufferedTransformation &bt) const
	save key into a BufferedTransformation
void	Load (BufferedTransformation &bt)
	load key from a BufferedTransformation
virtual void	BERDecode (BufferedTransformation &bt)=0
	decode this object from a BufferedTransformation, using BER (Basic Encoding Rules)
virtual void	DEREncode (BufferedTransformation &bt) const =0
	encode this object into a BufferedTransformation, using DER (Distinguished Encoding Rules)
virtual void	BEREncode (BufferedTransformation &bt) const
	encode this object into a BufferedTransformation, using BER
bool	Validate (RandomNumberGenerator &rng, unsigned int level) const
	check this object for errors
bool	SupportsPrecomputation () const
void	Precompute (unsigned int precomputationStorage=16)
	do precomputation
void	LoadPrecomputation (BufferedTransformation &storedPrecomputation)
	retrieve previously saved precomputation
void	SavePrecomputation (BufferedTransformation &storedPrecomputation) const
	save precomputation for later use
virtual const Element &	GetSubgroupGenerator () const
virtual void	SetSubgroupGenerator (const Element &base)
virtual Element	ExponentiateBase (const Integer &exponent) const
virtual Element	ExponentiateElement (const Element &base, const Integer &exponent) const
virtual const DL_GroupPrecomputation < Element > &	GetGroupPrecomputation () const =0
virtual const DL_FixedBasePrecomputation < Element > &	GetBasePrecomputation () const =0
virtual DL_FixedBasePrecomputation < Element > &	AccessBasePrecomputation ()=0
virtual Integer	GetCofactor () const
virtual bool	IsIdentity (const Element &element) const =0
virtual void	SimultaneousExponentiate (Element results, const Element &base, const Integer exponents, unsigned int exponentsCount) const =0
void	GenerateRandomWithKeySize (RandomNumberGenerator &rng, unsigned int keySize)
	calls the above function with a NameValuePairs object that just specifies "KeySize"
virtual void	ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const
	throws InvalidMaterial if this object fails Validate() test
void	DoQuickSanityCheck () const
template<class T >
bool	GetThisObject (T &object) const
	get a copy of this object or a subobject of it
template<class T >
bool	GetThisPointer (T *&p) const
	get a pointer to this object, as a pointer to T
template<class T >
bool	GetValue (const char *name, T &value) const
	get a named value, returns true if the name exists
template<class T >
T	GetValueWithDefault (const char *name, T defaultValue) const
	get a named value, returns the default if the name doesn't exist
std::string	GetValueNames () const
	get a list of value names that can be retrieved
bool	GetIntValue (const char *name, int &value) const
	get a named value with type int
int	GetIntValueWithDefault (const char *name, int defaultValue) const
	get a named value with type int, with default
template<class T >
void	GetRequiredParameter (const char className, const char name, T &value) const
void	GetRequiredIntParameter (const char className, const char name, int &value) const
Static Public Member Functions
static std::string	StaticAlgorithmNamePrefix ()
static void	ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving)
	used by derived classes to check for type mismatch
Protected Member Functions
Integer	ComputeGroupOrder (const Integer &modulus) const
virtual int	GetFieldType () const =0
virtual unsigned int	GetDefaultSubgroupOrderSize (unsigned int modulusSize) const
void	ParametersChanged ()

Detailed Description

_

Definition at line 23 of file gfpcrypt.h.

Member Function Documentation

void DL_GroupParameters_IntegerBased::GenerateRandom	(	RandomNumberGenerator &	rng,
		const NameValuePairs &	alg
	)			`[virtual]`

parameters: (ModulusSize, SubgroupOrderSize (optional))

Reimplemented from GeneratableCryptoMaterial.

Reimplemented in DL_GroupParameters_DSA.

Definition at line 163 of file gfpcrypt.cpp.

References NameValuePairs::GetIntValue(), NameValuePairs::GetIntValueWithDefault(), NameValuePairs::GetValue(), and NameValuePairs::GetValueWithDefault().

void DL_GroupParameters_IntegerBased::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 DL_GroupParameters_IntegerBasedImpl< GROUP_PRECOMP, BASE_PRECOMP >, DL_GroupParameters_IntegerBasedImpl< DL_GroupPrecomputation_LUC, DL_BasePrecomputation_LUC >, and DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation >.

Definition at line 233 of file gfpcrypt.cpp.

void ASN1CryptoMaterial< DL_GroupParameters< Integer > >::Load ( BufferedTransformation & bt ) [inline, virtual, inherited]

Reimplemented from CryptoMaterial.

Definition at line 240 of file asn.h.

virtual void ASN1Object::BEREncode ( BufferedTransformation & bt ) const [inline, virtual, inherited]

encode this object into a BufferedTransformation, using BER

this may be useful if DEREncode() would be too inefficient

Definition at line 1644 of file cryptlib.h.

bool DL_GroupParameters< Integer >::Validate	(	RandomNumberGenerator &	rng,
		unsigned int	level
	)			const `[inline, virtual, inherited]`

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.

Definition at line 531 of file pubkey.h.

bool DL_GroupParameters< Integer >::SupportsPrecomputation ( ) const [inline, virtual, inherited]

Returns:: whether this object supports precomputation

Reimplemented from CryptoMaterial.

Definition at line 555 of file pubkey.h.

void DL_GroupParameters< Integer >::Precompute ( unsigned int n = 16 ) [inline, virtual, inherited]

do precomputation

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 CryptoMaterial.

Definition at line 557 of file pubkey.h.

bool NameValuePairs::GetIntValue	(	const char *	name,
		int &	value
	)			const `[inline, inherited]`

get a named value with type int

used to ensure we don't accidentally try to get an unsigned int or some other type when we mean int (which is the most common case)

Definition at line 282 of file cryptlib.h.

Referenced by InvertibleRWFunction::GenerateRandom(), InvertibleRSAFunction::GenerateRandom(), InvertibleRabinFunction::GenerateRandom(), InvertibleLUCFunction::GenerateRandom(), GenerateRandom(), DL_GroupParameters_DSA::GenerateRandom(), and InvertibleESIGNFunction::GenerateRandom().

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

DL_GroupParameters_IntegerBased Class Reference

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Member Function Documentation