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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007 anytun.org <satp@wirdorange.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _MPI_H_
#define _MPI_H_
#include "datatypes.h"
#include "buffer.h"
#include <gcrypt.h>
class Mpi
{
public:
Mpi();
virtual ~Mpi();
Mpi(u_int8_t length);
Mpi(const Mpi &src);
Mpi(const u_int8_t * src, u_int32_t len);
void operator=(const Mpi &src);
void operator=(long unsigned int);
Mpi operator+(const Mpi &b) const;
Mpi operator+(const long unsigned int &b) const;
Mpi operator^(const Mpi &b) const;
Mpi operator*(const unsigned long int n) const;
void rShift(u_int8_t n); // LSB on the right side!
Mpi mul2exp(u_int32_t e) const; // value * 2^e
void clearHighBit(u_int32_t n);
u_int8_t *getBuf(u_int32_t buf_len) const;
u_int32_t getLen() const;
protected:
gcry_mpi_t val_;
};
#endif
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