Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes

DL_GroupParameters_GFP Class Reference

GF(p) group parameters. More...

#include <gfpcrypt.h>

Inheritance diagram for 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 DL_GroupParameters_DSA DL_GroupParameters_GFP_DefaultSafePrime

List of all members.

Public Types

typedef ModExpPrecomputation GroupPrecomputation
< typenameModExpPrecomputation::Element > 

Public Member Functions

bool IsIdentity (const Integer &element) const
void SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const
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
< Element > & 
GetBasePrecomputation () const
< 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)
virtual void BERDecode (BufferedTransformation &bt)=0
 decode this object from a BufferedTransformation, using BER (Basic Encoding Rules)
void DEREncode (BufferedTransformation &bt) const
virtual void DEREncode (BufferedTransformation &bt) const =0
 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
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
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 >
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

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

Protected Attributes

ModExpPrecomputation m_groupPrecomputation
< typenameModExpPrecomputation::Element > 

Detailed Description

GF(p) group parameters.

Definition at line 119 of file gfpcrypt.h.

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

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

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

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
true if the tests pass

Implements CryptoMaterial.

Definition at line 531 of file pubkey.h.

bool DL_GroupParameters< Integer >::SupportsPrecomputation (  )  const [inline, virtual, inherited]
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(), DL_GroupParameters_IntegerBased::GenerateRandom(), DL_GroupParameters_DSA::GenerateRandom(), and InvertibleESIGNFunction::GenerateRandom().

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