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-rw-r--r--mpi.h83
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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>
-
-
-/**
- * This class is a wrapper for the libgcrypt multi precision integer library [1]
- * [1] http://www.gnupg.org/documentation/manuals/gcrypt/MPI-library.html
- *
- */
-
-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=(u_int32_t src);
- Mpi operator+(const Mpi &b) const;
- Mpi operator+(const u_int32_t &b) const;
- Mpi operator*(const u_int32_t n) const;
- Mpi operator/(const Mpi &b) const;
-
- Mpi operator^(const Mpi &b) const;
-
- Mpi mul2exp(u_int32_t e) const; // value * 2^e
-
- /**
- * returns a new[] u_int8_t* buffer with the MPI value in the
- * GCRYMPI_FMT_STD (2-complement stored without a length header).<br>
- * you have to delete it by hand with delete[]!
- * @param buf_len size of the new buffer that is returned
- * @return a byte buffer of size buf_len
- */
- u_int8_t *getNewBuf(size_t* written) const;
- std::string getHexDump() const;
- u_int32_t getLength() const;
-
-protected:
- gcry_mpi_t val_;
-};
-
-
-
-#endif