Crypto++  8.2
Free C++ class library of cryptographic schemes
Public Types | Public Member Functions | List of all members
DL_PublicKey_EC< EC > Class Template Reference

Elliptic Curve Discrete Log (DL) public key. More...

+ Inheritance diagram for DL_PublicKey_EC< EC >:

Public Types

typedef EC::Point Element
 
- Public Types inherited from DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >
typedef DL_GroupParameters_EC< EC > ::Element Element
 
- Public Types inherited from DL_PublicKey< DL_GroupParameters_EC< EC > ::Element >
typedef DL_GroupParameters_EC< EC > ::Element Element
 
- Public Types inherited from DL_KeyImpl< X509PublicKey, DL_GroupParameters_EC< EC > >
typedef DL_GroupParameters_EC< EC > GroupParameters
 

Public Member Functions

void Initialize (const DL_GroupParameters_EC< EC > &params, const Element &Q)
 Initialize an EC Public Key using {GP,Q}. More...
 
void Initialize (const EC &ec, const Element &G, const Integer &n, const Element &Q)
 Initialize an EC Public Key using {EC,G,n,Q}. More...
 
void BERDecodePublicKey (BufferedTransformation &bt, bool parametersPresent, size_t size)
 Decode subjectPublicKey part of subjectPublicKeyInfo. More...
 
void DEREncodePublicKey (BufferedTransformation &bt) const
 Encode subjectPublicKey part of subjectPublicKeyInfo. More...
 
- Public Member Functions inherited from DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >
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...
 
void AssignFrom (const NameValuePairs &source)
 Assign values to this object. 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...
 
const DL_GroupParameters< Element > & GetAbstractGroupParameters () const
 Retrieves abstract group parameters. More...
 
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()
 Retrieves abstract group parameters. More...
 
const DL_FixedBasePrecomputation< Element > & GetPublicPrecomputation () const
 Accesses the public precomputation. More...
 
DL_FixedBasePrecomputation< Element > & AccessPublicPrecomputation ()
 Accesses the public precomputation. More...
 
bool operator== (const DL_PublicKeyImpl< DL_GroupParameters_EC< EC > > &rhs) const
 
- Public Member Functions inherited from DL_PublicKey< DL_GroupParameters_EC< EC > ::Element >
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...
 
virtual const Element & GetPublicElement () const
 Retrieves the public element. More...
 
virtual void SetPublicElement (const Element &y)
 Sets the public element. More...
 
virtual Element ExponentiatePublicElement (const Integer &exponent) const
 Exponentiates this element. More...
 
virtual Element CascadeExponentiateBaseAndPublicElement (const Integer &baseExp, const Integer &publicExp) const
 Exponentiates an element. More...
 
- Public Member Functions inherited from DL_KeyImpl< X509PublicKey, DL_GroupParameters_EC< EC > >
OID GetAlgorithmID () const
 
bool BERDecodeAlgorithmParameters (BufferedTransformation &bt)
 
bool DEREncodeAlgorithmParameters (BufferedTransformation &bt) const
 
const DL_GroupParameters_EC< EC > & GetGroupParameters () const
 
DL_GroupParameters_EC< EC > & AccessGroupParameters ()
 
- Public Member Functions inherited from X509PublicKey
void BERDecode (BufferedTransformation &bt)
 Decode this object from a BufferedTransformation. More...
 
void DEREncode (BufferedTransformation &bt) const
 Encode this object into a BufferedTransformation. More...
 
- Public Member Functions inherited from ASN1CryptoMaterial< PublicKey >
void Save (BufferedTransformation &bt) const
 DER encode ASN.1 object. More...
 
void Load (BufferedTransformation &bt)
 BER decode ASN.1 object. More...
 
- Public Member Functions inherited from ASN1Object
virtual void BEREncode (BufferedTransformation &bt) const
 Encode this object into a BufferedTransformation. More...
 
- Public Member Functions inherited from CryptoMaterial
virtual void ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const
 Check this object for errors. More...
 
void DoQuickSanityCheck () const
 Perform a quick sanity check. More...
 
- Public Member Functions inherited from NameValuePairs
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 >
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

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

Detailed Description

template<class EC>
class DL_PublicKey_EC< EC >

Elliptic Curve Discrete Log (DL) public key.

Template Parameters
ECelliptic curve field

Definition at line 178 of file eccrypto.h.

Member Function Documentation

◆ Initialize() [1/2]

template<class EC>
void DL_PublicKey_EC< EC >::Initialize ( const DL_GroupParameters_EC< EC > &  params,
const Element &  Q 
)
inline

Initialize an EC Public Key using {GP,Q}.

Parameters
paramsgroup parameters
Qthe public point

This Initialize() function overload initializes a public key from existing parameters.

Definition at line 189 of file eccrypto.h.

◆ Initialize() [2/2]

template<class EC>
void DL_PublicKey_EC< EC >::Initialize ( const EC &  ec,
const Element &  G,
const Integer n,
const Element &  Q 
)
inline

Initialize an EC Public Key using {EC,G,n,Q}.

Parameters
ecthe elliptic curve
Gthe base point
nthe order of the base point
Qthe public point

This Initialize() function overload initializes a public key from existing parameters.

Definition at line 198 of file eccrypto.h.

◆ BERDecodePublicKey()

template<class EC >
void DL_PublicKey_EC< EC >::BERDecodePublicKey ( BufferedTransformation bt,
bool  parametersPresent,
size_t  size 
)
virtual

Decode subjectPublicKey part of subjectPublicKeyInfo.

Parameters
btBufferedTransformation object
parametersPresentflag indicating if algorithm parameters are present
sizenumber of octets to read for the parameters, in bytes

BERDecodePublicKey() the decodes subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header.

When parametersPresent = true then BERDecodePublicKey() calls BERDecodeAlgorithmParameters() to parse algorithm parameters.

See also
BERDecodeAlgorithmParameters

Implements X509PublicKey.

Definition at line 699 of file eccrypto.cpp.

◆ DEREncodePublicKey()

template<class EC >
void DL_PublicKey_EC< EC >::DEREncodePublicKey ( BufferedTransformation bt) const
virtual

Encode subjectPublicKey part of subjectPublicKeyInfo.

Parameters
btBufferedTransformation object

DEREncodePublicKey() encodes the subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header.

See also
DEREncodeAlgorithmParameters

Implements X509PublicKey.

Definition at line 710 of file eccrypto.cpp.


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