Crypto++
8.4
Free C++ class library of cryptographic schemes
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GF(p) group parameters. More...
Public Member Functions | |
bool | IsIdentity (const Integer &element) const |
Determines if an element is an identity. More... | |
void | SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const |
Exponentiates a base to multiple exponents. More... | |
bool | GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const |
Get a named value. More... | |
Element | MultiplyElements (const Element &a, const Element &b) const |
Element | CascadeExponentiate (const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const |
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bool | GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const |
Get a named value. More... | |
void | AssignFrom (const NameValuePairs &source) |
Initialize or reinitialize this key. More... | |
const DL_FixedBasePrecomputation< Element > & | GetBasePrecomputation () const |
DL_FixedBasePrecomputation< Element > & | AccessBasePrecomputation () |
Retrieves the group precomputation. More... | |
const Integer & | GetModulus () const |
Retrieve the modulus for the group. More... | |
const Integer & | GetGenerator () const |
Retrieves a reference to the group generator. More... | |
void | SetModulusAndSubgroupGenerator (const Integer &p, const Integer &g) |
Set group parameters. More... | |
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 |
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const DL_GroupPrecomputation< Element > & | GetGroupPrecomputation () const |
Retrieves the group precomputation. More... | |
const DL_FixedBasePrecomputation< Element > & | GetBasePrecomputation () const |
Retrieves the group precomputation. More... | |
DL_FixedBasePrecomputation< Element > & | AccessBasePrecomputation () |
Retrieves the group precomputation. More... | |
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void | Initialize (const DL_GroupParameters_IntegerBased ¶ms) |
Initialize a group parameters over integers. More... | |
void | Initialize (RandomNumberGenerator &rng, unsigned int pbits) |
Create a group parameters over integers. More... | |
void | Initialize (const Integer &p, const Integer &g) |
Initialize a group parameters over integers. More... | |
void | Initialize (const Integer &p, const Integer &q, const Integer &g) |
Initialize a group parameters over integers. More... | |
void | BERDecode (BufferedTransformation &bt) |
Decode this object from a BufferedTransformation. More... | |
void | DEREncode (BufferedTransformation &bt) const |
Encode this object into a BufferedTransformation. More... | |
void | GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &alg) |
Generate a random key. More... | |
const Integer & | GetSubgroupOrder () const |
Integer | GetGroupOrder () const |
bool | ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const |
Check the group for errors. More... | |
bool | ValidateElement (unsigned int level, const Integer &element, const DL_FixedBasePrecomputation< Integer > *precomp) const |
Check the element for errors. More... | |
bool | FastSubgroupCheckAvailable () const |
Determine if subgroup membership check is fast. More... | |
void | EncodeElement (bool reversible, const Element &element, byte *encoded) const |
Encodes the element. More... | |
unsigned int | GetEncodedElementSize (bool reversible) const |
Retrieve the encoded element's size. More... | |
Integer | DecodeElement (const byte *encoded, bool checkForGroupMembership) const |
Decodes the element. More... | |
Integer | ConvertElementToInteger (const Element &element) const |
Converts an element to an Integer. More... | |
Integer | GetMaxExponent () const |
Retrieve the maximum exponent for the group. More... | |
OID | GetAlgorithmID () const |
Retrieve the OID of the algorithm. More... | |
virtual const Integer & | GetModulus () const =0 |
Retrieve the modulus for the group. More... | |
void | SetSubgroupOrder (const Integer &q) |
Set subgroup order. More... | |
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void | Save (BufferedTransformation &bt) const |
DER encode ASN.1 object. More... | |
void | Load (BufferedTransformation &bt) |
BER decode ASN.1 object. More... | |
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virtual void | BEREncode (BufferedTransformation &bt) const |
Encode this object into a BufferedTransformation. More... | |
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bool | Validate (RandomNumberGenerator &rng, unsigned int level) const |
Check this object for errors. More... | |
bool | GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const |
Get a named value. More... | |
bool | SupportsPrecomputation () const |
Determines whether the object supports precomputation. More... | |
void | Precompute (unsigned int precomputationStorage=16) |
Perform precomputation. More... | |
void | LoadPrecomputation (BufferedTransformation &storedPrecomputation) |
Retrieve previously saved precomputation. More... | |
void | SavePrecomputation (BufferedTransformation &storedPrecomputation) const |
Save precomputation for later use. More... | |
virtual const Element & | GetSubgroupGenerator () const |
Retrieves the subgroup generator. More... | |
virtual void | SetSubgroupGenerator (const Element &base) |
Sets the subgroup generator. More... | |
virtual Element | ExponentiateBase (const Integer &exponent) const |
Exponentiates the base. More... | |
virtual Element | ExponentiateElement (const Element &base, const Integer &exponent) const |
Exponentiates an element. More... | |
virtual const Integer & | GetSubgroupOrder () const=0 |
Retrieves the subgroup order. More... | |
virtual Integer | GetMaxExponent () const=0 |
Retrieves the maximum exponent for the group. More... | |
virtual Integer | GetGroupOrder () const |
Retrieves the order of the group. More... | |
virtual Integer | GetCofactor () const |
Retrieves the cofactor. More... | |
virtual bool | FastSubgroupCheckAvailable () const=0 |
virtual void | SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const=0 |
Exponentiates a base to multiple exponents. More... | |
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void | GenerateRandomWithKeySize (RandomNumberGenerator &rng, unsigned int keySize) |
Generate a random key or crypto parameters. More... | |
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virtual void | ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const |
Check this object for errors. More... | |
virtual bool | SupportsPrecomputation () const |
Determines whether the object supports precomputation. More... | |
void | DoQuickSanityCheck () const |
Perform a quick sanity check. More... | |
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template<class T > | |
bool | GetThisObject (T &object) const |
Get a copy of this object or subobject. More... | |
template<class T > | |
bool | GetThisPointer (T *&ptr) const |
Get a pointer to this object. More... | |
template<class T > | |
bool | GetValue (const char *name, T &value) const |
Get a named value. More... | |
template<class T > | |
T | GetValueWithDefault (const char *name, T defaultValue) const |
Get a named value. More... | |
CRYPTOPP_DLL std::string | GetValueNames () const |
Get a list of value names that can be retrieved. More... | |
CRYPTOPP_DLL bool | GetIntValue (const char *name, int &value) const |
Get a named value with type int. More... | |
CRYPTOPP_DLL int | GetIntValueWithDefault (const char *name, int defaultValue) const |
Get a named value with type int, with default. More... | |
CRYPTOPP_DLL bool | GetWord64Value (const char *name, word64 &value) const |
Get a named value with type word64. More... | |
CRYPTOPP_DLL word64 | GetWord64ValueWithDefault (const char *name, word64 defaultValue) const |
Get a named value with type word64, with default. More... | |
template<class T > | |
void | GetRequiredParameter (const char *className, const char *name, T &value) const |
Retrieves a required name/value pair. More... | |
CRYPTOPP_DLL void | GetRequiredIntParameter (const char *className, const char *name, int &value) const |
Retrieves a required name/value pair. More... | |
Additional Inherited Members | |
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typedef GROUP_PRECOMP::Element | Element |
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typedef ModExpPrecomputation | GroupPrecomputation |
typedef GROUP_PRECOMP::Element | Element |
typedef DL_FixedBasePrecomputationImpl< typename GROUP_PRECOMP::Element > | BasePrecomputation |
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typedef Integer | Element |
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static std::string | StaticAlgorithmNamePrefix () |
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static CRYPTOPP_DLL void | ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving) |
Ensures an expected name and type is present. More... | |
GF(p) group parameters.
Definition at line 224 of file gfpcrypt.h.
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inlinevirtual |
Determines if an element is an identity.
element | element to check |
Implements DL_GroupParameters< Integer >.
Definition at line 235 of file gfpcrypt.h.
void DL_GroupParameters_GFP::SimultaneousExponentiate | ( | Element * | results, |
const Element & | base, | ||
const Integer * | exponents, | ||
unsigned int | exponentsCount | ||
) | const |
Exponentiates a base to multiple exponents.
results | an array of Elements |
base | the base to raise to the exponents |
exponents | an array of exponents |
exponentsCount | the number of exponents in the array SimultaneousExponentiate() raises the base to each exponent in the exponents array and stores the result at the respective position in the results array. SimultaneousExponentiate() must be implemented in a derived class. |
COUNTOF(results) == exponentsCount
COUNTOF(exponents) == exponentsCount
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inlinevirtual |
Get a named value.
name | the name of the object or value to retrieve |
valueType | reference to a variable that receives the value |
pValue | void pointer to a variable that receives the value |
Reimplemented from DL_GroupParameters_IntegerBased.
Definition at line 260 of file gfpcrypt.h.