From 482e9f24b3c76966624c8d9a2950c3e9960ec86a Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Fri, 7 Nov 2003 05:26:27 +0000 Subject: New protocol: MS Kpasswd (RFC3244) KPasswd is partially dissected for UDP. It would be very useful if someone added dissection of the asn.1 encoded AP_REQ and the KRB-PRIV blobs. I dont think I will add those. svn path=/trunk/; revision=8905 --- packet-kpasswd.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 packet-kpasswd.c (limited to 'packet-kpasswd.c') diff --git a/packet-kpasswd.c b/packet-kpasswd.c new file mode 100644 index 0000000000..c0d708adb2 --- /dev/null +++ b/packet-kpasswd.c @@ -0,0 +1,166 @@ +/* packet-kpasswd.c + * Routines for kpasswd packet dissection + * Ronnie Sahlberg 2003 + * + * See RFC 3244 + * + * $Id: packet-kpasswd.c,v 1.1 2003/11/07 05:26:27 sahlberg Exp $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include +#include "prefs.h" + +static int proto_kpasswd = -1; +static int hf_kpasswd_message_len = -1; +static int hf_kpasswd_version = -1; +static int hf_kpasswd_ap_req_len = -1; +static int hf_kpasswd_ap_req_data = -1; +static int hf_kpasswd_krb_priv_message = -1; + +static gint ett_kpasswd = -1; +static gint ett_ap_req_data = -1; +static gint ett_krb_priv_message = -1; + + + +#define UDP_PORT_KPASSWD 464 + + +static const value_string vers_vals[] = { + { 0x0001, "Reply" }, + { 0xff80, "Request" }, + { 0, NULL }, +}; + + +static void +dissect_kpasswd_ap_req_data(packet_info *pinfo _U_, tvbuff_t *tvb, proto_tree *parent_tree) +{ + proto_item *it; + proto_tree *tree=NULL; + + if(parent_tree){ + it=proto_tree_add_item(parent_tree, hf_kpasswd_ap_req_data, tvb, 0, -1, FALSE); + tree=proto_item_add_subtree(it, ett_ap_req_data); + } + /* XXX we should dissect the AP_REQ data here */ +} + +static void +dissect_kpasswd_krb_priv_message(packet_info *pinfo _U_, tvbuff_t *tvb, proto_tree *parent_tree) +{ + proto_item *it; + proto_tree *tree=NULL; + + if(parent_tree){ + it=proto_tree_add_item(parent_tree, hf_kpasswd_krb_priv_message, tvb, 0, -1, FALSE); + tree=proto_item_add_subtree(it, ett_krb_priv_message); + } + /* XXX we should dissect the KRB-PRIV data here */ +} + + +static void +dissect_kpasswd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *kpasswd_item; + proto_tree *kpasswd_tree=NULL; + int offset = 0; + guint16 message_len, version, ap_req_len; + tvbuff_t *next_tvb; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "KPASSWD"); + if (check_col(pinfo->cinfo, COL_INFO)) + col_clear(pinfo->cinfo, COL_INFO); + + message_len=tvb_get_ntohs(tvb, offset); + version=tvb_get_ntohs(tvb, offset+2); + ap_req_len=tvb_get_ntohs(tvb, offset+4); + if(tree){ + kpasswd_item=proto_tree_add_item(tree, proto_kpasswd, tvb, offset, message_len, FALSE); + kpasswd_tree=proto_item_add_subtree(kpasswd_item, ett_kpasswd); + } + + proto_tree_add_uint(kpasswd_tree, hf_kpasswd_message_len, tvb, offset, 2, message_len); + proto_tree_add_uint(kpasswd_tree, hf_kpasswd_version, tvb, offset+2, 2, version); + if (check_col(pinfo->cinfo, COL_INFO)) + col_set_str(pinfo->cinfo, COL_INFO, val_to_str(version, vers_vals, "Unknown command")); + proto_tree_add_uint(kpasswd_tree, hf_kpasswd_ap_req_len, tvb, offset+4, 2, ap_req_len); + offset+=6; + + /* AP_REQ data */ + next_tvb=tvb_new_subset(tvb, offset, ap_req_len, ap_req_len); + dissect_kpasswd_ap_req_data(pinfo, next_tvb, kpasswd_tree); + offset+=ap_req_len; + + /* KRB-PRIB message */ + next_tvb=tvb_new_subset(tvb, offset, -1, -1); + dissect_kpasswd_krb_priv_message(pinfo, next_tvb, kpasswd_tree); + +} + + +void +proto_register_kpasswd(void) +{ + static hf_register_info hf[] = { + { &hf_kpasswd_message_len, + { "Message Length", "kpasswd.message_len", FT_UINT16, BASE_DEC, + NULL, 0, "Message Length", HFILL }}, + { &hf_kpasswd_ap_req_len, + { "AP_REQ Length", "kpasswd.ap_req_len", FT_UINT16, BASE_DEC, + NULL, 0, "Length of AP_REQ data", HFILL }}, + { &hf_kpasswd_version, + { "Version", "kpasswd.version", FT_UINT16, BASE_HEX, + VALS(vers_vals), 0, "Version", HFILL }}, + { &hf_kpasswd_ap_req_data, + { "AP_REQ", "kpasswd.ap_req", FT_NONE, BASE_NONE, + NULL, 0, "AP_REQ structure", HFILL }}, + { &hf_kpasswd_krb_priv_message, + { "KRB-PRIV", "kpasswd.krb_priv", FT_NONE, BASE_NONE, + NULL, 0, "KRB-PRIV message", HFILL }}, + }; + + static gint *ett[] = { + &ett_kpasswd, + &ett_ap_req_data, + &ett_krb_priv_message, + }; + + proto_kpasswd = proto_register_protocol("MS Kpasswd", + "Kpasswd", "kpasswd"); + proto_register_field_array(proto_kpasswd, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_kpasswd(void) +{ + dissector_handle_t kpasswd_handle; + + kpasswd_handle = create_dissector_handle(dissect_kpasswd, proto_kpasswd); + dissector_add("udp.port", UDP_PORT_KPASSWD, kpasswd_handle); +} -- cgit v1.2.3