#include <eccrypto.h>
Inheritance diagram for DL_GroupParameters_EC< EC >:
This class corresponds to the ASN.1 sequence of the same name in ANSI X9.62 (also SEC 1).
Definition at line 25 of file eccrypto.h.
Public Types | |
typedef EC | EllipticCurve |
typedef EllipticCurve::Point | Point |
typedef Point | Element |
typedef IncompatibleCofactorMultiplication | DefaultCofactorOption |
typedef EcPrecomputation< EC > | GroupPrecomputation |
typedef DL_FixedBasePrecomputationImpl< typenameEcPrecomputation< EC >::Element > | BasePrecomputation |
Public Member Functions | |
DL_GroupParameters_EC () | |
DL_GroupParameters_EC (const OID &oid) | |
DL_GroupParameters_EC (const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k=Integer::Zero()) | |
DL_GroupParameters_EC (BufferedTransformation &bt) | |
void | Initialize (const EllipticCurve &ec, const Point &G, const Integer &n, const Integer &k=Integer::Zero()) |
void | Initialize (const OID &oid) |
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 | |
void | GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &alg) |
this implementation doesn't actually generate a curve, it just initializes the parameters with existing values | |
const DL_FixedBasePrecomputation< Element > & | GetBasePrecomputation () const |
DL_FixedBasePrecomputation< Element > & | AccessBasePrecomputation () |
const Integer & | GetSubgroupOrder () const |
Integer | GetCofactor () const |
bool | ValidateGroup (RandomNumberGenerator &rng, unsigned int level) const |
bool | ValidateElement (unsigned int level, const Element &element, const DL_FixedBasePrecomputation< Element > *precomp) const |
bool | FastSubgroupCheckAvailable () const |
void | EncodeElement (bool reversible, const Element &element, byte *encoded) const |
unsigned int | GetEncodedElementSize (bool reversible) const |
Element | DecodeElement (const byte *encoded, bool checkForGroupMembership) const |
Integer | ConvertElementToInteger (const Element &element) const |
Integer | GetMaxExponent () const |
bool | IsIdentity (const Element &element) const |
void | SimultaneousExponentiate (Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const |
OID | GetAlgorithmID () const |
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 | BERDecode (BufferedTransformation &bt) |
void | DEREncode (BufferedTransformation &bt) const |
void | SetPointCompression (bool compress) |
bool | GetPointCompression () const |
void | SetEncodeAsOID (bool encodeAsOID) |
bool | GetEncodeAsOID () const |
const EllipticCurve & | GetCurve () const |
bool | operator== (const ThisClass &rhs) const |
const DL_GroupPrecomputation< Element > & | GetGroupPrecomputation () const |
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 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 Integer | GetGroupOrder () const |
virtual void | EncodeElement (bool reversible, const Element &element, byte *encoded) const =0 |
virtual Integer | ConvertElementToInteger (const Element &element) const =0 |
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 |
Static Public Member Functions | |
static std::string __cdecl | StaticAlgorithmNamePrefix () |
static OID __cdecl | GetNextRecommendedParametersOID (const OID &oid) |
Protected Member Functions | |
unsigned int | FieldElementLength () const |
unsigned int | ExponentLength () const |
void | ParametersChanged () |
Protected Attributes | |
OID | m_oid |
Integer | m_n |
bool | m_compress |
bool | m_encodeAsOID |
Integer | m_k |
EcPrecomputation< EC > | m_groupPrecomputation |
DL_FixedBasePrecomputationImpl< typenameEcPrecomputation< EC >::Element > | m_gpc |
void DL_GroupParameters_EC< EC >::AssignFrom | ( | const NameValuePairs & | source | ) | [virtual] |
assign values from source to this object
Implements CryptoMaterial.
Definition at line 414 of file eccrypto.cpp.
References Name::Cofactor(), Name::Curve(), NameValuePairs::GetRequiredParameter(), NameValuePairs::GetValue(), NameValuePairs::GetValueWithDefault(), Name::GroupOID(), DL_GroupParameters_EC< EC >::Initialize(), Name::SubgroupGenerator(), Name::SubgroupOrder(), and Integer::Zero().
Referenced by DL_GroupParameters_EC< EC >::GenerateRandom().
void DL_GroupParameters_EC< EC >::GenerateRandom | ( | RandomNumberGenerator & | rng, | |
const NameValuePairs & | alg | |||
) | [virtual] |
this implementation doesn't actually generate a curve, it just initializes the parameters with existing values
parameters: (Curve, SubgroupGenerator, SubgroupOrder, Cofactor (optional)), or (GroupOID)
Reimplemented from GeneratableCryptoMaterial.
Definition at line 435 of file eccrypto.cpp.
References DL_GroupParameters_EC< EC >::AssignFrom().
bool DL_GroupParameters< typenameEcPrecomputation< EC >::Element >::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 |
Implements CryptoMaterial.
void DL_GroupParameters< typenameEcPrecomputation< EC >::Element >::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.