158 lines
5.1 KiB
C++
158 lines
5.1 KiB
C++
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/***************************************************************************
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*
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Copyright 2013 CertiVox UK Ltd. *
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*
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This file is part of CertiVox MIRACL Crypto SDK. *
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*
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The CertiVox MIRACL Crypto SDK provides developers with an *
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extensive and efficient set of cryptographic functions. *
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For further information about its features and functionalities please *
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refer to http://www.certivox.com *
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*
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* The CertiVox MIRACL Crypto SDK is free software: you can *
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redistribute it and/or modify it under the terms of the *
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GNU Affero General Public License as published by the *
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Free Software Foundation, either version 3 of the License, *
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or (at your option) any later version. *
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*
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* The CertiVox MIRACL Crypto SDK is distributed in the hope *
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that it will be useful, but WITHOUT ANY WARRANTY; without even the *
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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See the GNU Affero General Public License for more details. *
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*
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* You should have received a copy of the GNU Affero General Public *
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License along with CertiVox MIRACL Crypto SDK. *
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If not, see <http://www.gnu.org/licenses/>. *
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*
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You can be released from the requirements of the license by purchasing *
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a commercial license. Buying such a license is mandatory as soon as you *
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develop commercial activities involving the CertiVox MIRACL Crypto SDK *
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without disclosing the source code of your own applications, or shipping *
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the CertiVox MIRACL Crypto SDK with a closed source product. *
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*
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***************************************************************************/
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/*
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* MIRACL C++ Header file ecn3.h
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*
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* AUTHOR : M. Scott
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*
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* PURPOSE : Definition of class ECn3 (Arithmetic on an Elliptic Curve,
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* mod n^3)
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*
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* NOTE : Must be used in conjunction with zzn.cpp, big.cpp and
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* zzn3.cpp
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*
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* WARNING: This class has been cobbled together for a specific use with
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* the MIRACL library. It is not complete, and may not work in other
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* applications
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*
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*/
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#ifndef ECN3_H
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#define ECN3_H
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#include "zzn3.h"
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//#define MR_ECN3_PROJECTIVE
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class ECn3
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{
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mutable ZZn3 x,y; // can change from affine to projective, but maintain same logical value
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#ifdef MR_ECN3_PROJECTIVE
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#ifndef MR_AFFINE_ONLY
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mutable ZZn3 z;
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#endif
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#endif
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mutable int marker;
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public:
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ECn3() {marker=MR_EPOINT_INFINITY;}
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ECn3(const ECn3& b)
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{
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x=b.x; y=b.y;
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#ifdef MR_ECN3_PROJECTIVE
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#ifndef MR_AFFINE_ONLY
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z=b.z;
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#endif
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#endif
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marker=b.marker;
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}
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ECn3& operator=(const ECn3& b)
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{
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x=b.x; y=b.y;
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#ifdef MR_ECN3_PROJECTIVE
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#ifndef MR_AFFINE_ONLY
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z=b.z;
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#endif
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#endif
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marker=b.marker;
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return *this;
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}
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int add(const ECn3&,ZZn3&,ZZn3 *ex1=NULL,ZZn3 *ex2=NULL );
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ECn3& operator+=(const ECn3&);
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ECn3& operator-=(const ECn3&);
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ECn3& operator*=(const Big&);
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void clear()
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{
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x=y=0;
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#ifdef MR_ECN3_PROJECTIVE
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#ifndef MR_AFFINE_ONLY
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z=0;
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#endif
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#endif
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marker=MR_EPOINT_INFINITY;
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}
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BOOL iszero() const;
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void get(ZZn3&,ZZn3&) const;
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void get(ZZn3&) const;
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#ifdef MR_ECN3_PROJECTIVE
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#ifndef MR_AFFINE_ONLY
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void getZ(ZZn3&) const;
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void get(ZZn3&,ZZn3&,ZZn3&) const;
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void set(const ZZn3&,const ZZn3&,const ZZn3&);
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#endif
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#endif
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BOOL set(const ZZn3&,const ZZn3&); // set on the curve - returns FALSE if no such point
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BOOL set(const ZZn3&); // sets x coordinate on curve, and finds y coordinate
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void norm(void) const;
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friend ECn3 operator-(const ECn3&);
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friend ECn3 operator+(const ECn3&,const ECn3&);
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friend ECn3 operator-(const ECn3&,const ECn3&);
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friend ECn3 mul(int,ECn3*,const Big*);
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friend ECn3 mul(const ECn3&,const Big&,const ECn3&,const Big&);
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friend BOOL operator==(const ECn3& a,const ECn3 &b)
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{
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#ifdef MR_ECN3_PROJECTIVE
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a.norm(); b.norm();
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#endif
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return (a.x==b.x && a.y==b.y && a.marker==b.marker);
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}
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friend BOOL operator!=(const ECn3& a,const ECn3 &b)
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{
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#ifdef MR_ECN3_PROJECTIVE
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a.norm(); b.norm();
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#endif
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return (a.x!=b.x || a.y!=b.y || a.marker!=b.marker);
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}
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friend ECn3 operator*(const Big &,const ECn3&);
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#ifndef MR_NO_STANDARD_IO
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friend ostream& operator<<(ostream&,const ECn3&);
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#endif
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~ECn3() {}
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};
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#endif
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