Imported Upstream version 0.3.5

[anytun.git] / src / authAlgo.h

diff --git a/src/authAlgo.h b/src/authAlgo.h
index c446853..a1fcea4 100644 (file)
--- a/src/authAlgo.h
+++ b/src/authAlgo.h
@@ -6,19 +6,20 @@
  *  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
+ *  message authentication based on the methods 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) 2007-2008 Othmar Gsenger, Erwin Nindl, 
+ *  Copyright (C) 2007-2014 Markus Grüneis, Othmar Gsenger, Erwin Nindl,
  *                          Christian Pointner <satp@wirdorange.org>
  *
  *  This file is part of Anytun.
  *
  *  Anytun is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 3 as
- *  published by the Free Software Foundation.
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
  *
  *  Anytun is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -26,22 +27,39 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
- *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
+ *  along with Anytun.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *  In addition, as a special exception, the copyright holders give
+ *  permission to link the code of portions of this program with the
+ *  OpenSSL library under certain conditions as described in each
+ *  individual source file, and distribute linked combinations
+ *  including the two.
+ *  You must obey the GNU General Public License in all respects
+ *  for all of the code used other than OpenSSL.  If you modify
+ *  file(s) with this exception, you may extend this exception to your
+ *  version of the file(s), but you are not obligated to do so.  If you
+ *  do not wish to do so, delete this exception statement from your
+ *  version.  If you delete this exception statement from all source
+ *  files in the program, then also delete it here.
  */
 
-#ifndef _AUTHALGO_H_
-#define _AUTHALGO_H_
+#ifndef ANYTUN_authAlgo_h_INCLUDED
+#define ANYTUN_authAlgo_h_INCLUDED
 
 #include "datatypes.h"
 #include "buffer.h"
 #include "encryptedPacket.h"
 
 #ifndef NO_CRYPT
-#ifndef USE_SSL_CRYPTO
-#include <gcrypt.h>
-#else
+
+#if defined(USE_SSL_CRYPTO)
 #include <openssl/hmac.h>
+#elif defined(USE_NETTLE)
+#include <nettle/hmac.h>
+#else  // USE_GCRYPT is the default
+#include <gcrypt.h>
 #endif
+
 #endif
 #include "keyDerivation.h"
 
@@ -76,7 +94,7 @@ public:
   void generate(KeyDerivation& kd, EncryptedPacket& packet);
   bool checkTag(KeyDerivation& kd, EncryptedPacket& packet);
 
-  static const u_int32_t DIGEST_LENGTH = 0;
+  static const uint32_t DIGEST_LENGTH = 0;
 };
 
 #ifndef NO_CRYPT
@@ -92,15 +110,17 @@ public:
   void generate(KeyDerivation& kd, EncryptedPacket& packet);
   bool checkTag(KeyDerivation& kd, EncryptedPacket& packet);
 
-  static const u_int32_t DIGEST_LENGTH = 20;
+  static const uint32_t DIGEST_LENGTH = 20;
 
 private:
-#ifndef USE_SSL_CRYPTO
-  gcry_md_hd_t handle_;
-#else
+#if defined(USE_SSL_CRYPTO)
   HMAC_CTX ctx_;
+#elif defined(USE_NETTLE)
+  struct hmac_sha1_ctx ctx_;
+#else  // USE_GCRYPT is the default
+  gcry_md_hd_t handle_;
 #endif
-  
+
   Buffer key_;
 };
 #endif