plugins/opcua/opcua_security_layer.c

   1 /******************************************************************************
   2 ** $Id$
   3 **
   4 ** Copyright (C) 2006-2007 ascolab GmbH. All Rights Reserved.
   5 ** Web: http://www.ascolab.com
   6 **
   7 ** This program is free software; you can redistribute it and/or
   8 ** modify it under the terms of the GNU General Public License
   9 ** as published by the Free Software Foundation; either version 2
  10 ** of the License, or (at your option) any later version.
  11 **
  12 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  13 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  14 **
  15 ** Project: OpcUa Wireshark Plugin
  16 **
  17 ** Description: OpcUa Security Layer Decoder.
  18 **
  19 ** Author: Gerhard Gappmeier <gerhard.gappmeier@ascolab.com>
  20 ** Last change by: $Author: gergap $
  21 **
  22 ******************************************************************************/
  23
  24 #include "config.h"
  25
  26 #include <glib.h>
  27 #include <epan/packet.h>
  28 #include "opcua_application_layer.h"
  29 #include "opcua_simpletypes.h"
  30
  31 #if 0
  32 /** NodeClass enum table */
  33 static const value_string g_SecSigTable[] = {
  34   { 0, "GetSecurityPolcies" },
  35   { 1, "OpenSecureChannel" },
  36   { 2, "CloseSecureChannel" },
  37   { 3, "Message" },
  38   { 0, NULL }
  39 };
  40 #endif
  41
  42 static int hf_opcua_security_tokenid = -1;
  43 static int hf_opcua_security_seq = -1;
  44 static int hf_opcua_security_rqid = -1;
  45
  46 /** Register security layer types. */
  47 void registerSecurityLayerTypes(int proto)
  48 {
  49     static hf_register_info hf[] =
  50     {
  51         { &hf_opcua_security_tokenid,
  52         {  "Security Token Id",        "security.tokenid",   FT_UINT32, BASE_DEC,  NULL, 0x0,    NULL,    HFILL }
  53         },
  54         { &hf_opcua_security_seq,
  55         {  "Security Sequence Number", "security.seq",       FT_UINT32, BASE_DEC,  NULL, 0x0,    NULL,    HFILL }
  56         },
  57         { &hf_opcua_security_rqid,
  58         {  "Security RequestId",       "security.rqid",      FT_UINT32, BASE_DEC,  NULL, 0x0,    NULL,    HFILL }
  59         }
  60     };
  61     proto_register_field_array(proto, hf, array_length(hf));
  62 }
  63
  64 /* Security Layer: message parsers
  65  * Only works for Security Policy "NoSecurity" at the moment.
  66  */
  67 void parseSecurityLayer(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
  68 {
  69     proto_tree_add_item(tree, hf_opcua_security_tokenid, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN); *pOffset+=4;
  70     proto_tree_add_item(tree, hf_opcua_security_seq, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN); *pOffset+=4;
  71     proto_tree_add_item(tree, hf_opcua_security_rqid, tvb, *pOffset, 4, ENC_LITTLE_ENDIAN); *pOffset+=4;
  72 }
  73
  74