added multible precission integer class

key derivation

1 files changed, 63 insertions, 0 deletions

diff --git a/mpi.h b/mpi.h
new file mode 100644
index 0000000..c8a9907
--- /dev/null
+++ b/mpi.h
@@ -0,0 +1,63 @@
+/*
+ *  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 Mpi &b) const;
+
+  void rShift(u_int8_t n);
+  Buffer getBuf() const;
+  u_int32_t getLen() const;
+ 
+protected:
+  gcry_mpi_t val_;
+};
+
+
+
+#endif