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Diffstat (limited to 'CryptoPP/ecp.h')
| -rw-r--r-- | CryptoPP/ecp.h | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/CryptoPP/ecp.h b/CryptoPP/ecp.h deleted file mode 100644 index d946be63a..000000000 --- a/CryptoPP/ecp.h +++ /dev/null @@ -1,126 +0,0 @@ -#ifndef CRYPTOPP_ECP_H -#define CRYPTOPP_ECP_H - -#include "modarith.h" -#include "eprecomp.h" -#include "smartptr.h" -#include "pubkey.h" - -NAMESPACE_BEGIN(CryptoPP) - -//! Elliptical Curve Point -struct CRYPTOPP_DLL ECPPoint -{ - ECPPoint() : identity(true) {} - ECPPoint(const Integer &x, const Integer &y) - : identity(false), x(x), y(y) {} - - bool operator==(const ECPPoint &t) const - {return (identity && t.identity) || (!identity && !t.identity && x==t.x && y==t.y);} - bool operator< (const ECPPoint &t) const - {return identity ? !t.identity : (!t.identity && (x<t.x || (x==t.x && y<t.y)));} - - bool identity; - Integer x, y; -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS AbstractGroup<ECPPoint>; - -//! Elliptic Curve over GF(p), where p is prime -class CRYPTOPP_DLL ECP : public AbstractGroup<ECPPoint> -{ -public: - typedef ModularArithmetic Field; - typedef Integer FieldElement; - typedef ECPPoint Point; - - ECP() {} - ECP(const ECP &ecp, bool convertToMontgomeryRepresentation = false); - ECP(const Integer &modulus, const FieldElement &a, const FieldElement &b) - : m_fieldPtr(new Field(modulus)), m_a(a.IsNegative() ? modulus+a : a), m_b(b) {} - // construct from BER encoded parameters - // this constructor will decode and extract the the fields fieldID and curve of the sequence ECParameters - ECP(BufferedTransformation &bt); - - // encode the fields fieldID and curve of the sequence ECParameters - void DEREncode(BufferedTransformation &bt) const; - - bool Equal(const Point &P, const Point &Q) const; - const Point& Identity() const; - const Point& Inverse(const Point &P) const; - bool InversionIsFast() const {return true;} - const Point& Add(const Point &P, const Point &Q) const; - const Point& Double(const Point &P) const; - Point ScalarMultiply(const Point &P, const Integer &k) const; - Point CascadeScalarMultiply(const Point &P, const Integer &k1, const Point &Q, const Integer &k2) const; - void SimultaneousMultiply(Point *results, const Point &base, const Integer *exponents, unsigned int exponentsCount) const; - - Point Multiply(const Integer &k, const Point &P) const - {return ScalarMultiply(P, k);} - Point CascadeMultiply(const Integer &k1, const Point &P, const Integer &k2, const Point &Q) const - {return CascadeScalarMultiply(P, k1, Q, k2);} - - bool ValidateParameters(RandomNumberGenerator &rng, unsigned int level=3) const; - bool VerifyPoint(const Point &P) const; - - unsigned int EncodedPointSize(bool compressed = false) const - {return 1 + (compressed?1:2)*GetField().MaxElementByteLength();} - // returns false if point is compressed and not valid (doesn't check if uncompressed) - bool DecodePoint(Point &P, BufferedTransformation &bt, size_t len) const; - bool DecodePoint(Point &P, const byte *encodedPoint, size_t len) const; - void EncodePoint(byte *encodedPoint, const Point &P, bool compressed) const; - void EncodePoint(BufferedTransformation &bt, const Point &P, bool compressed) const; - - Point BERDecodePoint(BufferedTransformation &bt) const; - void DEREncodePoint(BufferedTransformation &bt, const Point &P, bool compressed) const; - - Integer FieldSize() const {return GetField().GetModulus();} - const Field & GetField() const {return *m_fieldPtr;} - const FieldElement & GetA() const {return m_a;} - const FieldElement & GetB() const {return m_b;} - - bool operator==(const ECP &rhs) const - {return GetField() == rhs.GetField() && m_a == rhs.m_a && m_b == rhs.m_b;} - -private: - clonable_ptr<Field> m_fieldPtr; - FieldElement m_a, m_b; - mutable Point m_R; -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_FixedBasePrecomputationImpl<ECP::Point>; -CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupPrecomputation<ECP::Point>; - -template <class T> class EcPrecomputation; - -//! ECP precomputation -template<> class EcPrecomputation<ECP> : public DL_GroupPrecomputation<ECP::Point> -{ -public: - typedef ECP EllipticCurve; - - // DL_GroupPrecomputation - bool NeedConversions() const {return true;} - Element ConvertIn(const Element &P) const - {return P.identity ? P : ECP::Point(m_ec->GetField().ConvertIn(P.x), m_ec->GetField().ConvertIn(P.y));}; - Element ConvertOut(const Element &P) const - {return P.identity ? P : ECP::Point(m_ec->GetField().ConvertOut(P.x), m_ec->GetField().ConvertOut(P.y));} - const AbstractGroup<Element> & GetGroup() const {return *m_ec;} - Element BERDecodeElement(BufferedTransformation &bt) const {return m_ec->BERDecodePoint(bt);} - void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {m_ec->DEREncodePoint(bt, v, false);} - - // non-inherited - void SetCurve(const ECP &ec) - { - m_ec.reset(new ECP(ec, true)); - m_ecOriginal = ec; - } - const ECP & GetCurve() const {return *m_ecOriginal;} - -private: - value_ptr<ECP> m_ec, m_ecOriginal; -}; - -NAMESPACE_END - -#endif |