Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/ecpoint.h

@@ -0,0 +1,146 @@
+// ecpoint.h - written and placed in the public domain by Jeffrey Walton
+//             Data structures moved from ecp.h and ec2n.h. Added EncodedPoint interface
+
+/// \file ecpoint.h
+/// \brief Classes for Elliptic Curve points
+/// \since Crypto++ 6.0
+
+#ifndef CRYPTOPP_ECPOINT_H
+#define CRYPTOPP_ECPOINT_H
+
+#include "cryptlib.h"
+#include "integer.h"
+#include "algebra.h"
+#include "gf2n.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief Elliptical Curve Point over GF(p), where p is prime
+/// \since Crypto++ 2.0
+struct CRYPTOPP_DLL ECPPoint
+{
+	virtual ~ECPPoint() {}
+
+	/// \brief Construct an ECPPoint
+	/// \details identity is set to <tt>true</tt>
+	ECPPoint() : identity(true) {}
+
+	/// \brief Construct an ECPPoint from coordinates
+	/// \details identity is set to <tt>false</tt>
+	ECPPoint(const Integer &x, const Integer &y)
+		: x(x), y(y), identity(false) {}
+
+	/// \brief Tests points for equality
+	/// \param t the other point
+	/// \return true if the points are equal, false otherwise
+	bool operator==(const ECPPoint &t) const
+		{return (identity && t.identity) || (!identity && !t.identity && x==t.x && y==t.y);}
+
+	/// \brief Tests points for ordering
+	/// \param t the other point
+	/// \return true if this point is less than other, false otherwise
+	bool operator< (const ECPPoint &t) const
+		{return identity ? !t.identity : (!t.identity && (x<t.x || (x==t.x && y<t.y)));}
+
+	Integer x, y;
+	bool identity;
+};
+
+CRYPTOPP_DLL_TEMPLATE_CLASS AbstractGroup<ECPPoint>;
+
+/// \brief Elliptical Curve Point over GF(2^n)
+/// \since Crypto++ 2.0
+struct CRYPTOPP_DLL EC2NPoint
+{
+	virtual ~EC2NPoint() {}
+
+	/// \brief Construct an EC2NPoint
+	/// \details identity is set to <tt>true</tt>
+	EC2NPoint() : identity(true) {}
+
+	/// \brief Construct an EC2NPoint from coordinates
+	/// \details identity is set to <tt>false</tt>
+	EC2NPoint(const PolynomialMod2 &x, const PolynomialMod2 &y)
+		: x(x), y(y), identity(false) {}
+
+	/// \brief Tests points for equality
+	/// \param t the other point
+	/// \return true if the points are equal, false otherwise
+	bool operator==(const EC2NPoint &t) const
+		{return (identity && t.identity) || (!identity && !t.identity && x==t.x && y==t.y);}
+
+	/// \brief Tests points for ordering
+	/// \param t the other point
+	/// \return true if this point is less than other, false otherwise
+	bool operator< (const EC2NPoint &t) const
+		{return identity ? !t.identity : (!t.identity && (x<t.x || (x==t.x && y<t.y)));}
+
+	PolynomialMod2 x, y;
+	bool identity;
+};
+
+CRYPTOPP_DLL_TEMPLATE_CLASS AbstractGroup<EC2NPoint>;
+
+/// \brief Abstract class for encoding and decoding ellicptic curve points
+/// \tparam Point ellicptic curve point
+/// \details EncodedPoint is an interface for encoding and decoding elliptic curve points.
+///   The template parameter <tt>Point</tt> should be a class like ECP or EC2N.
+/// \since Crypto++ 6.0
+template <class Point>
+class EncodedPoint
+{
+public:
+	virtual ~EncodedPoint() {}
+
+	/// \brief Decodes an elliptic curve point
+	/// \param P point which is decoded
+	/// \param bt source BufferedTransformation
+	/// \param len number of bytes to read from the BufferedTransformation
+	/// \return true if a point was decoded, false otherwise
+	virtual bool DecodePoint(Point &P, BufferedTransformation &bt, size_t len) const =0;
+
+	/// \brief Decodes an elliptic curve point
+	/// \param P point which is decoded
+	/// \param encodedPoint byte array with the encoded point
+	/// \param len the size of the array
+	/// \return true if a point was decoded, false otherwise
+	virtual bool DecodePoint(Point &P, const byte *encodedPoint, size_t len) const =0;
+
+	/// \brief Verifies points on elliptic curve
+	/// \param P point to verify
+	/// \return true if the point is valid, false otherwise
+	virtual bool VerifyPoint(const Point &P) const =0;
+
+	/// \brief Determines encoded point size
+	/// \param compressed flag indicating if the point is compressed
+	/// \return the minimum number of bytes required to encode the point
+	virtual unsigned int EncodedPointSize(bool compressed = false) const =0;
+
+	/// \brief Encodes an elliptic curve point
+	/// \param P point which is decoded
+	/// \param encodedPoint byte array for the encoded point
+	/// \param compressed flag indicating if the point is compressed
+	/// \details <tt>encodedPoint</tt> must be at least EncodedPointSize() in length
+	virtual void EncodePoint(byte *encodedPoint, const Point &P, bool compressed) const =0;
+
+	/// \brief Encodes an elliptic curve point
+	/// \param bt target BufferedTransformation
+	/// \param P point which is encoded
+	/// \param compressed flag indicating if the point is compressed
+	virtual void EncodePoint(BufferedTransformation &bt, const Point &P, bool compressed) const =0;
+
+	/// \brief BER Decodes an elliptic curve point
+	/// \param bt source BufferedTransformation
+	/// \return the decoded elliptic curve point
+	virtual Point BERDecodePoint(BufferedTransformation &bt) const =0;
+
+	/// \brief DER Encodes an elliptic curve point
+	/// \param bt target BufferedTransformation
+	/// \param P point which is encoded
+	/// \param compressed flag indicating if the point is compressed
+	virtual void DEREncodePoint(BufferedTransformation &bt, const Point &P, bool compressed) const =0;
+};
+
+NAMESPACE_END
+
+#endif  // CRYPTOPP_ECPOINT_H