From 87735d1c20816e8c1c0092a86dc8d1ab80ab36db Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Sun, 17 Jun 2007 16:14:34 +0000
Subject: added cypher and authalgo

---
 cypher.cpp | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 cypher.cpp

(limited to 'cypher.cpp')

diff --git a/cypher.cpp b/cypher.cpp
new file mode 100644
index 0000000..8711862
--- /dev/null
+++ b/cypher.cpp
@@ -0,0 +1,55 @@
+/*
+ *  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
+ */
+
+#include "datatypes.h"
+
+#include "cypher.h"
+
+void Cypher::cypher(Buffer& buf)
+{
+  Buffer stream = getBitStream(buf.getLength());
+  calc(buf, stream, buf.getLength());
+}
+
+void Cypher::calc(u_int8_t* buf, u_int8_t* bit_stream, u_int32_t length)
+{
+  for(u_int32_t i; i<length; ++i)
+    buf[i] ^= bit_stream[i];
+}
+
+
+Buffer NullCypher::getBitStream(u_int32_t length)
+{
+  Buffer buf(length);
+  for(u_int32_t i; i<length; ++i)
+    buf[i] = 0;
+  return buf;
+}
+                 
-- 
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