Crypto++  8.2
Free C++ class library of cryptographic schemes
Public Types | Public Member Functions | List of all members
DL_FixedBasePrecomputation< T > Class Template Referenceabstract

DL_FixedBasePrecomputation interface. More...

+ Inheritance diagram for DL_FixedBasePrecomputation< T >:

Public Types

typedef T Element
 

Public Member Functions

virtual bool IsInitialized () const =0
 Determines whether this object is initialized. More...
 
virtual void SetBase (const DL_GroupPrecomputation< Element > &group, const Element &base)=0
 Set the base element. More...
 
virtual const Element & GetBase (const DL_GroupPrecomputation< Element > &group) const =0
 Get the base element. More...
 
virtual void Precompute (const DL_GroupPrecomputation< Element > &group, unsigned int maxExpBits, unsigned int storage)=0
 Perform precomputation. More...
 
virtual void Load (const DL_GroupPrecomputation< Element > &group, BufferedTransformation &storedPrecomputation)=0
 Retrieve previously saved precomputation. More...
 
virtual void Save (const DL_GroupPrecomputation< Element > &group, BufferedTransformation &storedPrecomputation) const =0
 Save precomputation for later use. More...
 
virtual Element Exponentiate (const DL_GroupPrecomputation< Element > &group, const Integer &exponent) const =0
 Exponentiates an element. More...
 
virtual Element CascadeExponentiate (const DL_GroupPrecomputation< Element > &pc1, const Integer &exponent1, const DL_FixedBasePrecomputation< Element > &pc2, const Integer &exponent2) const =0
 Exponentiates an element. More...
 

Detailed Description

template<class T>
class DL_FixedBasePrecomputation< T >

DL_FixedBasePrecomputation interface.

Template Parameters
TField element

Definition at line 60 of file eprecomp.h.

Member Function Documentation

◆ IsInitialized()

template<class T>
virtual bool DL_FixedBasePrecomputation< T >::IsInitialized ( ) const
pure virtual

◆ SetBase()

template<class T>
virtual void DL_FixedBasePrecomputation< T >::SetBase ( const DL_GroupPrecomputation< Element > &  group,
const Element &  base 
)
pure virtual

◆ GetBase()

template<class T>
virtual const Element& DL_FixedBasePrecomputation< T >::GetBase ( const DL_GroupPrecomputation< Element > &  group) const
pure virtual

◆ Precompute()

template<class T>
virtual void DL_FixedBasePrecomputation< T >::Precompute ( const DL_GroupPrecomputation< Element > &  group,
unsigned int  maxExpBits,
unsigned int  storage 
)
pure virtual

Perform precomputation.

Parameters
groupthe group
maxExpBitsused to calculate the exponent base
storagethe suggested number of objects for the precompute table

The exact semantics of Precompute() varies, but it typically means calculate a table of n objects that can be used later to speed up computation.

If a derived class does not override Precompute(), then the base class throws NotImplemented.

See also
SupportsPrecomputation(), LoadPrecomputation(), SavePrecomputation()

Implemented in DL_BasePrecomputation_LUC, DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element >, and DL_FixedBasePrecomputationImpl< typename EcPrecomputation< EC > ::Element >.

◆ Load()

template<class T>
virtual void DL_FixedBasePrecomputation< T >::Load ( const DL_GroupPrecomputation< Element > &  group,
BufferedTransformation storedPrecomputation 
)
pure virtual

Retrieve previously saved precomputation.

Parameters
groupthe the group
storedPrecomputationBufferedTransformation with the saved precomputation
Exceptions
NotImplemented
See also
SupportsPrecomputation(), Precompute()

Implemented in DL_BasePrecomputation_LUC, DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element >, and DL_FixedBasePrecomputationImpl< typename EcPrecomputation< EC > ::Element >.

◆ Save()

template<class T>
virtual void DL_FixedBasePrecomputation< T >::Save ( const DL_GroupPrecomputation< Element > &  group,
BufferedTransformation storedPrecomputation 
) const
pure virtual

Save precomputation for later use.

Parameters
groupthe the group
storedPrecomputationBufferedTransformation to write the precomputation
Exceptions
NotImplemented
See also
SupportsPrecomputation(), Precompute()

Implemented in DL_BasePrecomputation_LUC, DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element >, and DL_FixedBasePrecomputationImpl< typename EcPrecomputation< EC > ::Element >.

◆ Exponentiate()

template<class T>
virtual Element DL_FixedBasePrecomputation< T >::Exponentiate ( const DL_GroupPrecomputation< Element > &  group,
const Integer exponent 
) const
pure virtual

Exponentiates an element.

Parameters
groupthe group
exponentthe exponent
Returns
the result of the exponentiation

Implemented in DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element >, and DL_FixedBasePrecomputationImpl< typename EcPrecomputation< EC > ::Element >.

◆ CascadeExponentiate()

template<class T>
virtual Element DL_FixedBasePrecomputation< T >::CascadeExponentiate ( const DL_GroupPrecomputation< Element > &  pc1,
const Integer exponent1,
const DL_FixedBasePrecomputation< Element > &  pc2,
const Integer exponent2 
) const
pure virtual

Exponentiates an element.

Parameters
pc1the first the group precomputation
exponent1the first exponent
pc2the second the group precomputation
exponent2the first exponent2
Returns
the public element raised to the exponent

CascadeExponentiateBaseAndPublicElement raises the public element to the base element and precomputation.

Implemented in DL_BasePrecomputation_LUC, DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element >, and DL_FixedBasePrecomputationImpl< typename EcPrecomputation< EC > ::Element >.


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