forked from osmocom/wireshark
b803431715
svn path=/trunk/; revision=14032
280 lines
8.4 KiB
C
280 lines
8.4 KiB
C
/* packet-kpasswd.c
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* Routines for kpasswd packet dissection
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* Ronnie Sahlberg 2003
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*
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* See RFC 3244
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <epan/packet.h>
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#include "packet-kerberos.h"
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#include "packet-ber.h"
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#include <epan/prefs.h>
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static int proto_kpasswd = -1;
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static int hf_kpasswd_message_len = -1;
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static int hf_kpasswd_version = -1;
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static int hf_kpasswd_result = -1;
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static int hf_kpasswd_result_string = -1;
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static int hf_kpasswd_newpassword = -1;
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static int hf_kpasswd_ap_req_len = -1;
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static int hf_kpasswd_ap_req_data = -1;
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static int hf_kpasswd_krb_priv_message = -1;
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static int hf_kpasswd_ChangePasswdData = -1;
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static gint ett_kpasswd = -1;
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static gint ett_ap_req_data = -1;
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static gint ett_krb_priv_message = -1;
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static gint ett_ChangePasswdData = -1;
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#define UDP_PORT_KPASSWD 464
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static const value_string vers_vals[] = {
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{ 0x0001, "Reply" },
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{ 0xff80, "Request" },
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{ 0, NULL },
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};
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static void
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dissect_kpasswd_ap_req_data(packet_info *pinfo _U_, tvbuff_t *tvb, proto_tree *parent_tree)
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{
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proto_item *it;
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proto_tree *tree=NULL;
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if(parent_tree){
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it=proto_tree_add_item(parent_tree, hf_kpasswd_ap_req_data, tvb, 0, -1, FALSE);
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tree=proto_item_add_subtree(it, ett_ap_req_data);
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}
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dissect_kerberos_main(tvb, pinfo, tree, FALSE, NULL);
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}
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static int dissect_kpasswd_newpassword(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset)
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{
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offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_kpasswd_newpassword, NULL);
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return offset;
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}
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static ber_sequence_t ChangePasswdData_sequence[] = {
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{ BER_CLASS_CON, 0, 0,
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dissect_kpasswd_newpassword },
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{ BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL,
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dissect_krb5_cname },
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{ BER_CLASS_CON, 2, BER_FLAGS_OPTIONAL,
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dissect_krb5_realm },
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{ 0, 0, 0, NULL }
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};
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static int
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dissect_kpasswd_user_data_request(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree)
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{
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int offset=0;
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offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, ChangePasswdData_sequence, hf_kpasswd_ChangePasswdData, ett_ChangePasswdData);
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return offset;
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}
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static kerberos_callbacks cb_req[] = {
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{ KRB_CBTAG_PRIV_USER_DATA, dissect_kpasswd_user_data_request },
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{ 0, NULL }
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};
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#define KRB5_KPASSWD_SUCCESS 0
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#define KRB5_KPASSWD_MALFORMED 1
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#define KRB5_KPASSWD_HARDERROR 2
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#define KRB5_KPASSWD_AUTHERROR 3
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#define KRB5_KPASSWD_SOFTERROR 4
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#define KRB5_KPASSWD_ACCESSDENIED 5
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#define KRB5_KPASSWD_BAD_VERSION 6
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#define KRB5_KPASSWD_INITIAL_FLAG_NEEDED 7
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static const value_string kpasswd_result_types[] = {
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{ KRB5_KPASSWD_SUCCESS, "Success" },
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{ KRB5_KPASSWD_MALFORMED, "Malformed" },
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{ KRB5_KPASSWD_HARDERROR, "HardError" },
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{ KRB5_KPASSWD_AUTHERROR, "AuthError" },
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{ KRB5_KPASSWD_SOFTERROR, "SoftError" },
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{ KRB5_KPASSWD_ACCESSDENIED, "AccessDenied" },
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{ KRB5_KPASSWD_BAD_VERSION, "BadVersion" },
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{ KRB5_KPASSWD_INITIAL_FLAG_NEEDED, "InitialFlagNeeded" },
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{ 0, NULL }
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};
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static int
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dissect_kpasswd_user_data_reply(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree)
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{
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int offset=0;
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guint16 result;
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/* result */
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result = tvb_get_letohs(tvb, offset);
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proto_tree_add_uint(tree, hf_kpasswd_result, tvb, offset, 2, result);
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offset+=2;
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO,
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val_to_str(result, kpasswd_result_types, "Result: %u"));
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/* optional result string */
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if(tvb_length_remaining(tvb, offset)){
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proto_tree_add_item(tree, hf_kpasswd_result_string, tvb, offset, tvb_length_remaining(tvb, offset), FALSE);
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offset+=tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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static kerberos_callbacks cb_rep[] = {
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{ KRB_CBTAG_PRIV_USER_DATA, dissect_kpasswd_user_data_reply },
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{ 0, NULL }
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};
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static void
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dissect_kpasswd_krb_priv_message(packet_info *pinfo _U_, tvbuff_t *tvb, proto_tree *parent_tree, gboolean isrequest)
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{
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proto_item *it;
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proto_tree *tree=NULL;
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if(parent_tree){
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it=proto_tree_add_item(parent_tree, hf_kpasswd_krb_priv_message, tvb, 0, -1, FALSE);
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tree=proto_item_add_subtree(it, ett_krb_priv_message);
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}
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if(isrequest){
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dissect_kerberos_main(tvb, pinfo, tree, FALSE, cb_req);
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} else {
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dissect_kerberos_main(tvb, pinfo, tree, FALSE, cb_rep);
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}
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}
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static void
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dissect_kpasswd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *kpasswd_item;
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proto_tree *kpasswd_tree=NULL;
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int offset = 0;
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guint16 message_len, version, ap_req_len;
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tvbuff_t *next_tvb;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "KPASSWD");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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/* it might be a KERBEROS ERROR */
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if(tvb_get_guint8(tvb, offset)==0x7e){
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next_tvb=tvb_new_subset(tvb, offset, -1, -1);
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dissect_kerberos_main(next_tvb, pinfo, tree, FALSE, NULL);
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return;
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}
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message_len=tvb_get_ntohs(tvb, offset);
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version=tvb_get_ntohs(tvb, offset+2);
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ap_req_len=tvb_get_ntohs(tvb, offset+4);
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if(tree){
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kpasswd_item=proto_tree_add_item(tree, proto_kpasswd, tvb, offset, message_len, FALSE);
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kpasswd_tree=proto_item_add_subtree(kpasswd_item, ett_kpasswd);
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}
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proto_tree_add_uint(kpasswd_tree, hf_kpasswd_message_len, tvb, offset, 2, message_len);
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proto_tree_add_uint(kpasswd_tree, hf_kpasswd_version, tvb, offset+2, 2, version);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, val_to_str(version, vers_vals, "Unknown command"));
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proto_tree_add_uint(kpasswd_tree, hf_kpasswd_ap_req_len, tvb, offset+4, 2, ap_req_len);
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offset+=6;
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/* AP_REQ data */
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next_tvb=tvb_new_subset(tvb, offset, ap_req_len, ap_req_len);
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dissect_kpasswd_ap_req_data(pinfo, next_tvb, kpasswd_tree);
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offset+=ap_req_len;
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/* KRB-PRIB message */
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next_tvb=tvb_new_subset(tvb, offset, -1, -1);
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dissect_kpasswd_krb_priv_message(pinfo, next_tvb, kpasswd_tree, (version==0xff80));
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}
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void
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proto_register_kpasswd(void)
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{
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static hf_register_info hf[] = {
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{ &hf_kpasswd_message_len,
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{ "Message Length", "kpasswd.message_len", FT_UINT16, BASE_DEC,
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NULL, 0, "Message Length", HFILL }},
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{ &hf_kpasswd_ap_req_len,
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{ "AP_REQ Length", "kpasswd.ap_req_len", FT_UINT16, BASE_DEC,
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NULL, 0, "Length of AP_REQ data", HFILL }},
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{ &hf_kpasswd_version,
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{ "Version", "kpasswd.version", FT_UINT16, BASE_HEX,
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VALS(vers_vals), 0, "Version", HFILL }},
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{ &hf_kpasswd_result,
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{ "Result", "kpasswd.result", FT_UINT16, BASE_DEC,
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VALS(kpasswd_result_types), 0, "Result", HFILL }},
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{ &hf_kpasswd_result_string,
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{ "Result String", "kpasswd.result_string", FT_STRING, BASE_NONE,
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NULL, 0, "Result String", HFILL }},
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{ &hf_kpasswd_newpassword,
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{ "New Password", "kpasswd.new_password", FT_STRING, BASE_NONE,
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NULL, 0, "New Password", HFILL }},
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{ &hf_kpasswd_ap_req_data,
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{ "AP_REQ", "kpasswd.ap_req", FT_NONE, BASE_NONE,
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NULL, 0, "AP_REQ structure", HFILL }},
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{ &hf_kpasswd_krb_priv_message,
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{ "KRB-PRIV", "kpasswd.krb_priv", FT_NONE, BASE_NONE,
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NULL, 0, "KRB-PRIV message", HFILL }},
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{ &hf_kpasswd_ChangePasswdData, {
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"ChangePasswdData", "kpasswd.ChangePasswdData", FT_NONE, BASE_DEC,
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NULL, 0, "Change Password Data structure", HFILL }},
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};
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static gint *ett[] = {
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&ett_kpasswd,
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&ett_ap_req_data,
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&ett_krb_priv_message,
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&ett_ChangePasswdData,
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};
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proto_kpasswd = proto_register_protocol("MS Kpasswd",
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"Kpasswd", "kpasswd");
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proto_register_field_array(proto_kpasswd, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_kpasswd(void)
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{
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dissector_handle_t kpasswd_handle;
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kpasswd_handle = create_dissector_handle(dissect_kpasswd, proto_kpasswd);
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dissector_add("udp.port", UDP_PORT_KPASSWD, kpasswd_handle);
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}
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