Crypto++ 8.2
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DL_GroupParameters_DSA Class Reference

DSA group parameters. More...

#include <gfpcrypt.h>

+ Inheritance diagram for DL_GroupParameters_DSA:

Public Types

enum  { MIN_PRIME_LENGTH = 1024 , MAX_PRIME_LENGTH = 3072 , PRIME_LENGTH_MULTIPLE = 1024 }
 
- Public Types inherited from DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation >
typedef GROUP_PRECOMP::Element Element
 
- Public Types inherited from DL_GroupParametersImpl< GROUP_PRECOMP, BASE_PRECOMP, BASE >
typedef GROUP_PRECOMP GroupPrecomputation
 
typedef GROUP_PRECOMP::Element Element
 
typedef BASE_PRECOMP BasePrecomputation
 
- Public Types inherited from DL_GroupParameters< T >
typedef T Element
 

Public Member Functions

bool ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const
 
void GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &alg)
 
- Public Member Functions inherited from DL_GroupParameters_GFP
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
 Get a named value.
 
Element MultiplyElements (const Element &a, const Element &b) const
 
Element CascadeExponentiate (const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const
 
- Public Member Functions inherited from DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation >
bool GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const
 Get a named value.
 
void AssignFrom (const NameValuePairs &source)
 Assign values to this object.
 
const DL_FixedBasePrecomputation< Element > & GetBasePrecomputation () const
 Retrieves the group precomputation.
 
DL_FixedBasePrecomputation< Element > & AccessBasePrecomputation ()
 Retrieves the group precomputation.
 
const IntegerGetModulus () const
 
const IntegerGetGenerator () const
 
void SetModulusAndSubgroupGenerator (const Integer &p, const Integer &g)
 
bool operator== (const DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typename GROUP_PRECOMP::Element > > &rhs) const
 
bool operator!= (const DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation, DL_FixedBasePrecomputationImpl< typename GROUP_PRECOMP::Element > > &rhs) const
 
- Public Member Functions inherited from DL_GroupParametersImpl< GROUP_PRECOMP, BASE_PRECOMP, BASE >
const DL_GroupPrecomputation< Element > & GetGroupPrecomputation () const
 Retrieves the group precomputation.
 
const DL_FixedBasePrecomputation< Element > & GetBasePrecomputation () const
 Retrieves the group precomputation.
 
DL_FixedBasePrecomputation< Element > & AccessBasePrecomputation ()
 Retrieves the group precomputation.
 
- Public Member Functions inherited from DL_GroupParameters< T >
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
 Get a named value.
 
bool SupportsPrecomputation () const
 Determines whether the object supports precomputation.
 
void Precompute (unsigned int precomputationStorage=16)
 Perform precomputation.
 
void LoadPrecomputation (BufferedTransformation &storedPrecomputation)
 Retrieve previously saved precomputation.
 
void SavePrecomputation (BufferedTransformation &storedPrecomputation) const
 Save precomputation for later use.
 
virtual const Element & GetSubgroupGenerator () const
 Retrieves the subgroup generator.
 
virtual void SetSubgroupGenerator (const Element &base)
 Sets the subgroup generator.
 
virtual Element ExponentiateBase (const Integer &exponent) const
 Exponentiates the base.
 
virtual Element ExponentiateElement (const Element &base, const Integer &exponent) const
 Exponentiates an element.
 
virtual const DL_GroupPrecomputation< Element > & GetGroupPrecomputation () const =0
 Retrieves the group precomputation.
 
virtual const DL_FixedBasePrecomputation< Element > & GetBasePrecomputation () const =0
 Retrieves the group precomputation.
 
virtual DL_FixedBasePrecomputation< Element > & AccessBasePrecomputation ()=0
 Retrieves the group precomputation.
 
virtual const IntegerGetSubgroupOrder () const =0
 Retrieves the subgroup order.
 
virtual Integer GetMaxExponent () const =0
 Retrieves the maximum exponent for the group.
 
virtual Integer GetGroupOrder () const
 Retrieves the order of the group.
 
virtual Integer GetCofactor () const
 Retrieves the cofactor.
 
virtual unsigned int GetEncodedElementSize (bool reversible) const =0
 Retrieves the encoded element's size.
 
virtual void EncodeElement (bool reversible, const Element &element, byte *encoded) const =0
 Encodes the element.
 
virtual Element DecodeElement (const byte *encoded, bool checkForGroupMembership) const =0
 Decodes the element.
 
virtual Integer ConvertElementToInteger (const Element &element) const =0
 Converts an element to an Integer.
 
virtual bool ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const =0
 Check the group for errors.
 
virtual bool ValidateElement (unsigned int level, const Element &element, const DL_FixedBasePrecomputation< Element > *precomp) const =0
 Check the element for errors.
 
virtual bool FastSubgroupCheckAvailable () const =0
 
virtual bool IsIdentity (const Element &element) const =0
 Determines if an element is an identity.
 
virtual void SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const =0
 Exponentiates a base to multiple exponents.
 
- Public Member Functions inherited from GeneratableCryptoMaterial
virtual void GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &params=g_nullNameValuePairs)
 Generate a random key or crypto parameters.
 
void GenerateRandomWithKeySize (RandomNumberGenerator &rng, unsigned int keySize)
 Generate a random key or crypto parameters.
 
- Public Member Functions inherited from CryptoMaterial
virtual void AssignFrom (const NameValuePairs &source)=0
 Assign values to this object.
 
virtual bool Validate (RandomNumberGenerator &rng, unsigned int level) const =0
 Check this object for errors.
 
virtual void ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const
 Check this object for errors.
 
virtual void Save (BufferedTransformation &bt) const
 Saves a key to a BufferedTransformation.
 
virtual void Load (BufferedTransformation &bt)
 Loads a key from a BufferedTransformation.
 
virtual bool SupportsPrecomputation () const
 Determines whether the object supports precomputation.
 
virtual void Precompute (unsigned int precomputationStorage)
 Perform precomputation.
 
virtual void LoadPrecomputation (BufferedTransformation &storedPrecomputation)
 Retrieve previously saved precomputation.
 
virtual void SavePrecomputation (BufferedTransformation &storedPrecomputation) const
 Save precomputation for later use.
 
void DoQuickSanityCheck () const
 Perform a quick sanity check.
 
- Public Member Functions inherited from NameValuePairs
template<class T >
bool GetThisObject (T &object) const
 Get a copy of this object or subobject.
 
template<class T >
bool GetThisPointer (T *&ptr) const
 Get a pointer to this object.
 
template<class T >
bool GetValue (const char *name, T &value) const
 Get a named value.
 
template<class T >
GetValueWithDefault (const char *name, T defaultValue) const
 Get a named value.
 
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.
 
bool GetWord64Value (const char *name, word64 &value) const
 Get a named value with type word64.
 
word64 GetWord64ValueWithDefault (const char *name, word64 defaultValue) const
 Get a named value with type word64, with default.
 
template<class T >
void GetRequiredParameter (const char *className, const char *name, T &value) const
 Retrieves a required name/value pair.
 
void GetRequiredIntParameter (const char *className, const char *name, int &value) const
 Retrieves a required name/value pair.
 
virtual bool GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const =0
 Get a named value.
 

Static Public Member Functions

static bool IsValidPrimeLength (unsigned int pbits)
 
- Static Public Member Functions inherited from NameValuePairs
static void ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving)
 Ensures an expected name and type is present.
 

Detailed Description

DSA group parameters.

These are GF(p) group parameters that are allowed by the DSA standard

See also
DL_Keys_DSA

Definition at line 601 of file gfpcrypt.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Definition at line 615 of file gfpcrypt.h.

Constructor & Destructor Documentation

◆ ~DL_GroupParameters_DSA()

virtual DL_GroupParameters_DSA::~DL_GroupParameters_DSA ( )
inlinevirtual

Definition at line 604 of file gfpcrypt.h.

Member Function Documentation

◆ ValidateGroup()

bool DL_GroupParameters_DSA::ValidateGroup ( RandomNumberGenerator rng,
unsigned int  level 
) const
virtual

also checks that the lengths of p and q are allowed by the DSA standard

Implements DL_GroupParameters< T >.

Definition at line 70 of file gfpcrypt.cpp.

◆ GenerateRandom()

void DL_GroupParameters_DSA::GenerateRandom ( RandomNumberGenerator rng,
const NameValuePairs alg 
)
virtual

parameters: (ModulusSize), or (Modulus, SubgroupOrder, SubgroupGenerator)

ModulusSize must be between DSA::MIN_PRIME_LENGTH and DSA::MAX_PRIME_LENGTH, and divisible by DSA::PRIME_LENGTH_MULTIPLE

Reimplemented from GeneratableCryptoMaterial.

Definition at line 37 of file gfpcrypt.cpp.

◆ IsValidPrimeLength()

static bool DL_GroupParameters_DSA::IsValidPrimeLength ( unsigned int  pbits)
inlinestatic

Definition at line 612 of file gfpcrypt.h.


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