aboutsummaryrefslogtreecommitdiffstats
path: root/packet-dcerpc-krb5rpc.c
blob: e82ee3fe03f4e266bbfae180b0b8d95183683350 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
/* packet-dcerpc-krb5rpc.c
 *
 * Routines for dcerpc DCE/KRB5 interface
 * Copyright 2002, Jaime Fournier <Jaime.Fournier@hush.com>
 * This information is based off the released idl files from opengroup.
 * ftp://ftp.opengroup.org/pub/dce122/dce/src/security.tar.gz security/idl/krb5rpc.idl
 *
 * $Id: packet-dcerpc-krb5rpc.c,v 1.8 2004/01/27 04:15:48 guy Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * 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


#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#include <string.h>

#include <glib.h>
#include <epan/packet.h>
#include "packet-dcerpc.h"
#include "packet-kerberos.h"
#include "packet-dcerpc-dce122.h"

static int proto_krb5rpc = -1;

static gint ett_krb5rpc = -1;


static e_uuid_t uuid_krb5rpc =
  { 0x8f73de50, 0x768c, 0x11ca, {0xbf, 0xfc, 0x08, 0x00, 0x1e, 0x03, 0x94,
				 0x31}
};
static guint16 ver_krb5rpc = 1;
static int hf_krb5rpc_opnum = -1;
static int hf_krb5rpc_sendto_kdc_rqst_keysize = -1;
static int hf_krb5rpc_sendto_kdc_rqst_spare1 = -1;
static int hf_krb5rpc_sendto_kdc_resp_len = -1;
static int hf_krb5rpc_sendto_kdc_resp_max = -1;
static int hf_krb5rpc_sendto_kdc_resp_spare1 = -1;
static int hf_krb5rpc_sendto_kdc_resp_keysize = -1;
static int hf_krb5rpc_sendto_kdc_resp_st = -1;
static int hf_krb5rpc_krb5 = -1;
static gint ett_krb5rpc_krb5 = -1;

static int
krb5rpc_dissect_sendto_kdc_rqst (tvbuff_t * tvb, int offset,
				 packet_info * pinfo, proto_tree * tree,
				 guint8 *drep)
{
  guint32 keysize, spare1, remain;
  proto_item *item;
  tvbuff_t *krb5_tvb;
  proto_tree *subtree;


  /*
   *        [in]        handle_t        h,
   *        [in]        unsigned32      len,
   *        [in, size_is(len)]
   *        byte            message[],
   *        [in]        unsigned32      out_buf_len,
   */

  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_rqst_keysize, &keysize);
  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_rqst_spare1, &spare1);
  item = proto_tree_add_item (tree, hf_krb5rpc_krb5, tvb, offset, -1, TRUE);
  subtree = proto_item_add_subtree (item, ett_krb5rpc_krb5);

  remain = tvb_length_remaining(tvb, offset);
  krb5_tvb = tvb_new_subset (tvb, offset, remain, remain);
  offset = dissect_kerberos_main (krb5_tvb, pinfo, subtree, TRUE);


  return offset;
}


static int
krb5rpc_dissect_sendto_kdc_resp (tvbuff_t * tvb, int offset,
				 packet_info * pinfo, proto_tree * tree,
				 guint8 *drep)
{
  guint32 resp_len, maxsize, spare1, keysize, remain;
  proto_item *item;
  tvbuff_t *krb5_tvb;
  proto_tree *subtree;


  /*
   *
   *        [out]       unsigned32      *resp_len,
   *        [out, length_is(*resp_len), size_is(out_buf_len)]
   *        byte            out_buf[],
   *        [out]       error_status_t  *st unsigned long
   *
   */

  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_resp_len, &resp_len);
  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_resp_max, &maxsize);
  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_resp_spare1, &spare1);
  offset =
    dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
			hf_krb5rpc_sendto_kdc_resp_keysize, &keysize);


  item = proto_tree_add_item (tree, hf_krb5rpc_krb5, tvb, offset, -1, TRUE);
  subtree = proto_item_add_subtree (item, ett_krb5rpc_krb5);
  remain = tvb_length_remaining(tvb, offset);
  krb5_tvb = tvb_new_subset (tvb, offset, remain, remain);

  offset = dissect_kerberos_main (krb5_tvb, pinfo, subtree, TRUE);
  offset += 16; /* no idea what this is, probably just extended encrypted text. */

  return offset;
}


static dcerpc_sub_dissector krb5rpc_dissectors[] = {
  {0, "rsec_krb5rpc_sendto_kdc", krb5rpc_dissect_sendto_kdc_rqst,
   krb5rpc_dissect_sendto_kdc_resp},
  {0, NULL, NULL, NULL},
};


void
proto_register_krb5rpc (void)
{
  static hf_register_info hf[] = {
    {&hf_krb5rpc_opnum,
     {"hf_krb5rpc_opnum", "hf_krb5rpc_opnum", FT_UINT16, BASE_DEC, NULL, 0x0,
      "", HFILL }},
    {&hf_krb5rpc_sendto_kdc_rqst_keysize,
     {"hf_krb5rpc_sendto_kdc_rqst_keysize",
      "hf_krb5rpc_sendto_kdc_rqst_keysize", FT_UINT32, BASE_DEC, NULL, 0x0,
      "", HFILL}},
    {&hf_krb5rpc_sendto_kdc_rqst_spare1,
     {"hf_krb5rpc_sendto_kdc_rqst_spare1",
      "hf_krb5rpc_sendto_kdc_rqst_spare1", FT_UINT32, BASE_DEC, NULL, 0x0, "",
      HFILL}},
    {&hf_krb5rpc_sendto_kdc_resp_len,
     {"hf_krb5rpc_sendto_kdc_resp_len", "hf_krb5rpc_sendto_kdc_resp_len",
      FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL}},
    {&hf_krb5rpc_sendto_kdc_resp_max,
     {"hf_krb5rpc_sendto_kdc_resp_max", "hf_krb5rpc_sendto_kdc_resp_max",
      FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL}},
    {&hf_krb5rpc_sendto_kdc_resp_spare1,
     {"hf_krb5rpc_sendto_kdc_resp_spare1",
      "hf_krb5rpc_sendto_kdc_resp_spare1", FT_UINT32, BASE_DEC, NULL, 0x0, "",
      HFILL}},
    {&hf_krb5rpc_sendto_kdc_resp_keysize,
     {"hf_krb5rpc_sendto_kdc_resp_keysize",
      "hf_krb5rpc_sendto_kdc_resp_keysize", FT_UINT32, BASE_DEC, NULL, 0x0,
      "", HFILL}},
    {&hf_krb5rpc_sendto_kdc_resp_st,
     {"hf_krb5rpc_sendto_kdc_resp_st", "hf_krb5rpc_sendto_kdc_resp_st",
      FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL}},
    {&hf_krb5rpc_krb5,
     {"hf_krb5rpc_krb5", "hf_krb5rpc_krb5", FT_BYTES, BASE_HEX, NULL, 0x0,
      "krb5_blob", HFILL}},

  };

  static gint *ett[] = {
    &ett_krb5rpc,
    &ett_krb5rpc_krb5,
  };
  proto_krb5rpc =
    proto_register_protocol ("DCE/RPC Kerberos V", "KRB5RPC", "krb5rpc");
  proto_register_field_array (proto_krb5rpc, hf, array_length (hf));
  proto_register_subtree_array (ett, array_length (ett));
}

void
proto_reg_handoff_krb5rpc (void)
{
  /* Register the protocol as dcerpc */
  dcerpc_init_uuid (proto_krb5rpc, ett_krb5rpc, &uuid_krb5rpc, ver_krb5rpc,
		    krb5rpc_dissectors, hf_krb5rpc_opnum);
}