big svn cleanup

1 files changed, 83 insertions, 0 deletions

diff --git a/src/mpi.h b/src/mpi.h
new file mode 100644
index 0000000..b23c22b
--- /dev/null
+++ b/src/mpi.h
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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