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DL_GroupParameters_IntegerBased Class Reference

#include <gfpcrypt.h>

Inheritance diagram for DL_GroupParameters_IntegerBased:

DL_GroupParameters< Integer > ASN1CryptoMaterial CryptoParameters ASN1Object CryptoMaterial GeneratableCryptoMaterial NameValuePairs CryptoMaterial NameValuePairs DL_GroupParametersImpl< DL_GroupPrecomputation_LUC, DL_BasePrecomputation_LUC, DL_GroupParameters_IntegerBased > DL_GroupParametersImpl< GROUP_PRECOMP, BASE_PRECOMP, DL_GroupParameters_IntegerBased > DL_GroupParametersImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typenameModExpPrecomputation::Element >, DL_GroupParameters_IntegerBased > DL_GroupParameters_IntegerBasedImpl< DL_GroupPrecomputation_LUC, DL_BasePrecomputation_LUC > DL_GroupParameters_IntegerBasedImpl< GROUP_PRECOMP, BASE_PRECOMP > DL_GroupParameters_LUC DL_GroupParameters_LUC_DefaultSafePrime List of all members.

Detailed Description

Definition at line 21 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 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
virtual const IntegerGetModulus () const=0
virtual void SetModulusAndSubgroupGenerator (const Integer &p, const Integer &g)=0
void SetSubgroupOrder (const Integer &q)
bool Validate (RandomNumberGenerator &rng, unsigned int level) const
 check this object for errors

bool SupportsPrecomputation () const
 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 ValidateElement (unsigned int level, const Element &element, const DL_FixedBasePrecomputation< Element > *precomp) 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
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

virtual void Save (BufferedTransformation &bt) const
 save key into a BufferedTransformation

virtual void Load (BufferedTransformation &bt)
 load key from a BufferedTransformation

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> 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
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


Static Public Member Functions

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

Integer ComputeGroupOrder (const Integer &modulus) const
virtual int GetFieldType () const=0
virtual unsigned int GetDefaultSubgroupOrderSize (unsigned int modulusSize) const
void ParametersChanged ()


Member Function Documentation

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

parameters: (ModulusSize, SubgroupOrderSize (optional))

Reimplemented from GeneratableCryptoMaterial.

Definition at line 157 of file gfpcrypt.cpp.

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

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 >, and DL_GroupParameters_IntegerBasedImpl< DL_GroupPrecomputation_LUC, DL_BasePrecomputation_LUC >.

Definition at line 227 of file gfpcrypt.cpp.

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 559 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 585 of file pubkey.h.

virtual void CryptoMaterial::Load BufferedTransformation bt  )  [inline, virtual, inherited]
 

load key from a BufferedTransformation

Exceptions:
KeyingErr if decode fails
Note:
Generally does not check that the key is valid. Call ValidateKey() or ThrowIfInvalidKey() to check that.

Reimplemented in ASN1CryptoMaterial.

Definition at line 966 of file cryptlib.h.

Referenced by AsymmetricAlgorithm::BERDecode().

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 258 of file cryptlib.h.

References NameValuePairs::GetValue().

Referenced by InvertibleRWFunction::GenerateRandom(), InvertibleRSAFunction::GenerateRandom(), InvertibleRabinFunction::GenerateRandom(), InvertibleLUCFunction::GenerateRandom(), GenerateRandom(), DL_GroupParameters_DSA::GenerateRandom(), and InvertibleESIGNFunction::GenerateRandom().

void ASN1CryptoMaterial::Load BufferedTransformation bt  )  [inline, virtual, inherited]
 

load key from a BufferedTransformation

Exceptions:
KeyingErr if decode fails
Note:
Generally does not check that the key is valid. Call ValidateKey() or ThrowIfInvalidKey() to check that.

Reimplemented from CryptoMaterial.

Definition at line 49 of file simple.h.

References ASN1Object::BERDecode().

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 1551 of file cryptlib.h.

References ASN1Object::DEREncode().

Referenced by ASN1CryptoMaterial::Save().


The documentation for this class was generated from the following files:
Generated on Sun Mar 14 20:44:34 2004 for Crypto++ by doxygen 1.3.6-20040222