big svn cleanup

1 files changed, 104 insertions, 0 deletions

diff --git a/src/authAlgo.h b/src/authAlgo.h
new file mode 100644
index 0000000..b0832a5
--- /dev/null
+++ b/src/authAlgo.h
@@ -0,0 +1,104 @@
+/*
+ *  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 _AUTHALGO_H_
+#define _AUTHALGO_H_
+
+#include "datatypes.h"
+#include "buffer.h"
+#include "encryptedPacket.h"
+
+#include <gcrypt.h>
+
+class AuthAlgo
+{
+public:
+  AuthAlgo() {};
+  virtual ~AuthAlgo() {};
+
+  /**
+   * set the key for the auth algo
+   * @param key key for hmac calculation
+   */
+  virtual void setKey(Buffer& key) = 0;
+
+  /**
+   * generate the mac
+   * @param packet the packet to be authenticated
+   */
+  virtual void generate(EncryptedPacket& packet) = 0;
+
+  /**
+   * check the mac
+   * @param packet the packet to be authenticated
+   */
+  virtual bool checkTag(EncryptedPacket& packet) = 0;
+
+  /**
+   * get the maximum size of the auth algo
+   */
+  virtual u_int32_t getMaxLength() = 0;
+};
+
+//****** NullAuthAlgo ******
+
+class NullAuthAlgo : public AuthAlgo
+{
+public:
+  void setKey(Buffer& key) {};
+  void generate(EncryptedPacket& packet);
+  bool checkTag(EncryptedPacket& packet);
+  u_int32_t getMaxLength();
+
+  static const u_int32_t MAX_LENGTH_ = 0;
+};
+
+
+//****** Sha1AuthAlgo ******
+//* HMAC SHA1 Auth Tag Generator Class
+
+class Sha1AuthAlgo : public AuthAlgo
+{
+public:
+  Sha1AuthAlgo();
+  ~Sha1AuthAlgo();
+
+  void setKey(Buffer& key);
+  void generate(EncryptedPacket& packet);
+  bool checkTag(EncryptedPacket& packet);
+  u_int32_t getMaxLength();
+
+  static const u_int32_t MAX_LENGTH_ = 20;
+
+private:
+  gcry_md_hd_t ctx_;
+};
+
+#endif