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Diffstat (limited to 'embeddedcryptopp/ec2n.h')
| -rw-r--r-- | embeddedcryptopp/ec2n.h | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/embeddedcryptopp/ec2n.h b/embeddedcryptopp/ec2n.h deleted file mode 100644 index ae4007c..0000000 --- a/embeddedcryptopp/ec2n.h +++ /dev/null @@ -1,113 +0,0 @@ -#ifndef CRYPTOPP_EC2N_H -#define CRYPTOPP_EC2N_H - -#include "gf2n.h" -#include "eprecomp.h" -#include "smartptr.h" -#include "pubkey.h" - -NAMESPACE_BEGIN(CryptoPP) - -//! Elliptic Curve Point -struct CRYPTOPP_DLL EC2NPoint -{ - EC2NPoint() : identity(true) {} - EC2NPoint(const PolynomialMod2 &x, const PolynomialMod2 &y) - : identity(false), x(x), y(y) {} - - bool operator==(const EC2NPoint &t) const - {return (identity && t.identity) || (!identity && !t.identity && x==t.x && y==t.y);} - bool operator< (const EC2NPoint &t) const - {return identity ? !t.identity : (!t.identity && (x<t.x || (x==t.x && y<t.y)));} - - bool identity; - PolynomialMod2 x, y; -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS AbstractGroup<EC2NPoint>; - -//! Elliptic Curve over GF(2^n) -class CRYPTOPP_DLL EC2N : public AbstractGroup<EC2NPoint> -{ -public: - typedef GF2NP Field; - typedef Field::Element FieldElement; - typedef EC2NPoint Point; - - EC2N() {} - EC2N(const Field &field, const Field::Element &a, const Field::Element &b) - : m_field(field), m_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 - EC2N(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 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)*m_field->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 Integer::Power2(m_field->MaxElementBitLength());} - const Field & GetField() const {return *m_field;} - const FieldElement & GetA() const {return m_a;} - const FieldElement & GetB() const {return m_b;} - - bool operator==(const EC2N &rhs) const - {return GetField() == rhs.GetField() && m_a == rhs.m_a && m_b == rhs.m_b;} - -private: - clonable_ptr<Field> m_field; - FieldElement m_a, m_b; - mutable Point m_R; -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS DL_FixedBasePrecomputationImpl<EC2N::Point>; -CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupPrecomputation<EC2N::Point>; - -template <class T> class EcPrecomputation; - -//! EC2N precomputation -template<> class EcPrecomputation<EC2N> : public DL_GroupPrecomputation<EC2N::Point> -{ -public: - typedef EC2N EllipticCurve; - - // DL_GroupPrecomputation - 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 EC2N &ec) {m_ec = ec;} - const EC2N & GetCurve() const {return m_ec;} - -private: - EC2N m_ec; -}; - -NAMESPACE_END - -#endif |