DL_GroupParameters_GFP_DefaultSafePrime Class Reference

#include <gfpcrypt.h>

Inheritance diagram for DL_GroupParameters_GFP_DefaultSafePrime:

DL_GroupParameters_GFP DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation > DL_GroupParametersImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typenameModExpPrecomputation::Element >, DL_GroupParameters_IntegerBased > DL_GroupParameters_IntegerBased ASN1CryptoMaterial< DL_GroupParameters< Integer > > ASN1Object DL_GroupParameters< Integer > CryptoParameters GeneratableCryptoMaterial CryptoMaterial NameValuePairs List of all members.

Detailed Description

GF(p) group parameters that default to same primes.

Definition at line 141 of file gfpcrypt.h.

Public Types

typedef NoCofactorMultiplication DefaultCofactorOption
typedef ModExpPrecomputation::Element Element
typedef ModExpPrecomputation GroupPrecomputation
typedef DL_FixedBasePrecomputationImpl<
typenameModExpPrecomputation::Element > 
BasePrecomputation

Public Member Functions

bool IsIdentity (const Integer &element) const
void SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const
virtual void SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const =0
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
Element MultiplyElements (const Element &a, const Element &b) const
Element CascadeExponentiate (const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const
void AssignFrom (const NameValuePairs &source)
 assign values from source to this object
const DL_FixedBasePrecomputation<
Element > & 
GetBasePrecomputation () const
DL_FixedBasePrecomputation<
Element > & 
AccessBasePrecomputation ()
const IntegerGetModulus () const
const IntegerGetGenerator () const
void SetModulusAndSubgroupGenerator (const Integer &p, const Integer &g)
bool operator== (const DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typenameModExpPrecomputation::Element > > &rhs) const
bool operator!= (const DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typenameModExpPrecomputation::Element > > &rhs) const
const DL_GroupPrecomputation<
Element > & 
GetGroupPrecomputation () const
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)
const IntegerGetSubgroupOrder () 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
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 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 Integer GetCofactor () const

Static Public Member Functions

static std::string __cdecl StaticAlgorithmNamePrefix ()

Protected Member Functions

unsigned int GetDefaultSubgroupOrderSize (unsigned int modulusSize) const
int GetFieldType () const
Integer ComputeGroupOrder (const Integer &modulus) const
void ParametersChanged ()

Protected Attributes

ModExpPrecomputation m_groupPrecomputation
DL_FixedBasePrecomputationImpl<
typenameModExpPrecomputation::Element > 
m_gpc


Member Function Documentation

void DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation , DL_FixedBasePrecomputationImpl< typename ModExpPrecomputation ::Element> >::AssignFrom ( const NameValuePairs source  )  [inline, virtual, inherited]

assign values from source to this object

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

Reimplemented from DL_GroupParameters_IntegerBased.

Definition at line 95 of file gfpcrypt.h.

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

parameters: (ModulusSize, SubgroupOrderSize (optional))

Reimplemented from GeneratableCryptoMaterial.

Reimplemented in DL_GroupParameters_DSA.

Definition at line 163 of file gfpcrypt.cpp.

References DL_GroupParameters_IntegerBased::ComputeGroupOrder(), PrimeAndGenerator::Generate(), PrimeAndGenerator::Generator(), DL_GroupParameters_IntegerBased::GetDefaultSubgroupOrderSize(), NameValuePairs::GetIntValue(), NameValuePairs::GetIntValueWithDefault(), NameValuePairs::GetValue(), NameValuePairs::GetValueWithDefault(), DL_GroupParameters_IntegerBased::Initialize(), PrimeAndGenerator::Prime(), and PrimeAndGenerator::SubPrime().

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.


The documentation for this class was generated from the following file:
Generated on Sat Dec 23 02:07:20 2006 for Crypto++ by  doxygen 1.5.1-p1