DL_GroupParameters< T > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_GroupParameters< T >:

CryptoParameters GeneratableCryptoMaterial CryptoMaterial NameValuePairs List of all members.

Detailed Description

template<class T>
class DL_GroupParameters< T >

interface for DL group parameters

Definition at line 521 of file pubkey.h.

Public Types

typedef T Element

Public Member Functions

 DL_GroupParameters ()
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
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 ElementGetSubgroupGenerator () 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 const IntegerGetSubgroupOrder () const=0
virtual Integer GetMaxExponent () const=0
virtual Integer GetGroupOrder () const
virtual Integer GetCofactor () const
virtual unsigned int GetEncodedElementSize (bool reversible) const =0
virtual void EncodeElement (bool reversible, const Element &element, byte *encoded) const =0
virtual Element DecodeElement (const byte *encoded, bool checkForGroupMembership) const =0
virtual Integer ConvertElementToInteger (const Element &element) const =0
virtual bool ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const=0
virtual bool ValidateElement (unsigned int level, const Element &element, const DL_FixedBasePrecomputation< Element > *precomp) const =0
virtual bool FastSubgroupCheckAvailable () const=0
virtual bool IsIdentity (const Element &element) const =0
virtual void SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const =0

Protected Member Functions

void ParametersChanged ()


Member Function Documentation

template<class T>
bool DL_GroupParameters< T >::Validate ( RandomNumberGenerator rng,
unsigned int  level 
) const [inline, 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.

Definition at line 531 of file pubkey.h.

template<class T>
void DL_GroupParameters< T >::Precompute ( unsigned int  precomputationStorage = 16  )  [inline, virtual]

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.


The documentation for this class was generated from the following file:
Generated on Sat Dec 23 02:07:19 2006 for Crypto++ by  doxygen 1.5.1-p1