EncodedPoint< Point > Class Template Reference

Abstract class for encoding and decoding ellicptic curve points. More...

#include <ecpoint.h>

Public Member Functions
virtual bool	DecodePoint (Point &P, BufferedTransformation &bt, size_t len) const =0
	Decodes an elliptic curve point. More...
virtual bool	DecodePoint (Point &P, const byte *encodedPoint, size_t len) const =0
	Decodes an elliptic curve point. More...
virtual bool	VerifyPoint (const Point &P) const =0
	Verifies points on elliptic curve. More...
virtual unsigned int	EncodedPointSize (bool compressed=false) const =0
	Determines encoded point size. More...
virtual void	EncodePoint (byte *encodedPoint, const Point &P, bool compressed) const =0
	Encodes an elliptic curve point. More...
virtual void	EncodePoint (BufferedTransformation &bt, const Point &P, bool compressed) const =0
	Encodes an elliptic curve point. More...
virtual Point	BERDecodePoint (BufferedTransformation &bt) const =0
	BER Decodes an elliptic curve point. More...
virtual void	DEREncodePoint (BufferedTransformation &bt, const Point &P, bool compressed) const =0
	DER Encodes an elliptic curve point. More...

Detailed Description

template<class Point>
class EncodedPoint< Point >

Abstract class for encoding and decoding ellicptic curve points.

Template Parameters

Point

ellicptic curve point

EncodedPoint is an interface for encoding and decoding elliptic curve points. The template parameter Point should be a class like ECP or EC2N.

Since

Crypto++ 6.0

Definition at line 90 of file ecpoint.h.

Constructor & Destructor Documentation

~EncodedPoint()

template<class Point >

virtual EncodedPoint< Point >::~EncodedPoint ( )

inlinevirtual

Definition at line 93 of file ecpoint.h.

Member Function Documentation

DecodePoint() [1/2]

template<class Point >

virtual bool EncodedPoint< Point >::DecodePoint ( Point &  P, BufferedTransformation &  bt, size_t  len  ) const

pure virtual

Decodes an elliptic curve point.

Parameters

P	point which is decoded
bt	source BufferedTransformation
len	number of bytes to read from the BufferedTransformation

Returns

true if a point was decoded, false otherwise

Implemented in EC2N, and ECP.

DecodePoint() [2/2]

template<class Point >

virtual bool EncodedPoint< Point >::DecodePoint ( Point &  P, const byte *  encodedPoint, size_t  len  ) const

pure virtual

Decodes an elliptic curve point.

Parameters

P	point which is decoded
encodedPoint	byte array with the encoded point
len	the size of the array

Returns

true if a point was decoded, false otherwise

Implemented in EC2N, and ECP.

VerifyPoint()

template<class Point >

virtual bool EncodedPoint< Point >::VerifyPoint ( const Point &  P ) const

pure virtual

Verifies points on elliptic curve.

Parameters

P	point to verify

Returns

true if the point is valid, false otherwise

Implemented in EC2N, and ECP.

EncodedPointSize()

template<class Point >

virtual unsigned int EncodedPoint< Point >::EncodedPointSize ( bool  compressed = false ) const

pure virtual

Determines encoded point size.

Parameters

compressed

flag indicating if the point is compressed

Returns

the minimum number of bytes required to encode the point

Implemented in EC2N, and ECP.

EncodePoint() [1/2]

template<class Point >

virtual void EncodedPoint< Point >::EncodePoint ( byte *  encodedPoint, const Point &  P, bool  compressed  ) const

pure virtual

Encodes an elliptic curve point.

Parameters

P	point which is decoded
encodedPoint	byte array for the encoded point
compressed	flag indicating if the point is compressed

encodedPoint must be at least EncodedPointSize() in length

Implemented in EC2N, and ECP.

EncodePoint() [2/2]

template<class Point >

virtual void EncodedPoint< Point >::EncodePoint ( BufferedTransformation &  bt, const Point &  P, bool  compressed  ) const

pure virtual

Encodes an elliptic curve point.

Parameters

bt	target BufferedTransformation
P	point which is encoded
compressed	flag indicating if the point is compressed

Implemented in EC2N, and ECP.

BERDecodePoint()

template<class Point >

virtual Point EncodedPoint< Point >::BERDecodePoint ( BufferedTransformation &  bt ) const

pure virtual

BER Decodes an elliptic curve point.

Parameters

bt	source BufferedTransformation

Returns

the decoded elliptic curve point

Implemented in EC2N, and ECP.

DEREncodePoint()

template<class Point >

virtual void EncodedPoint< Point >::DEREncodePoint ( BufferedTransformation &  bt, const Point &  P, bool  compressed  ) const

pure virtual

DER Encodes an elliptic curve point.

Parameters

bt	target BufferedTransformation
P	point which is encoded
compressed	flag indicating if the point is compressed

Implemented in EC2N, and ECP.

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

• ecpoint.h