Crypto++: DL_GroupParameters_IntegerBased Class Reference

Detailed Description

Definition at line 23 of file gfpcrypt.h.


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)
	decode this object from a BufferedTransformation, using BER (Basic Encoding Rules)
void	DEREncode (BufferedTransformation &bt) const
	encode this object into a BufferedTransformation, using DER (Distinguished Encoding Rules)
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	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
	Returns: whether this object supports precomputation
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
Static Public Member Functions
static std::string __cdecl	StaticAlgorithmNamePrefix ()
Protected Member Functions
Integer	ComputeGroupOrder (const Integer &modulus) const
virtual int	GetFieldType () const=0
virtual unsigned int	GetDefaultSubgroupOrderSize (unsigned int modulusSize) const
void	ParametersChanged ()

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 1579 of file cryptlib.h.

Referenced by ASN1CryptoMaterial< PublicKey >::Save().

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.

void DL_GroupParameters< Integer >::Precompute ( unsigned int precomputationStorage = 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.

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

DL_GroupParameters_IntegerBased Class Reference

Detailed Description

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Member Function Documentation