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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
|
/* packet-tacacs.h
* Routines for cisco tacplus packet dissection
* Copyright 2000, Emanuele Caratti <wiz@iol.it>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_TACACS_H__
#define __PACKET_TACACS_H__
#define TAC_PLUS_HDR_SIZE 12
#define MD5_LEN 16
#define MSCHAP_DIGEST_LEN 49
enum
{
FLAGS_UNENCRYPTED = 0x01,
FLAGS_SINGLE = 0x04
};
/* Tacacs+ packet type */
enum
{
TAC_PLUS_AUTHEN = 0x01, /* Authentication */
TAC_PLUS_AUTHOR = 0x02, /* Authorization */
TAC_PLUS_ACCT = 0x03 /* Accounting */
};
/* Flags */
#define TAC_PLUS_ENCRYPTED 0x0
#define TAC_PLUS_CLEAR 0x1
/* Authentication action to perform */
enum
{
TAC_PLUS_AUTHEN_LOGIN = 0x01,
TAC_PLUS_AUTHEN_CHPASS = 0x02,
TAC_PLUS_AUTHEN_SENDPASS = 0x03, /* deprecated */
TAC_PLUS_AUTHEN_SENDAUTH = 0x04
};
/* Authentication priv_levels */
enum
{
TAC_PLUS_PRIV_LVL_MAX = 0x0f,
TAC_PLUS_PRIV_LVL_ROOT = 0x0f,
TAC_PLUS_PRIV_LVL_USER = 0x01,
TAC_PLUS_PRIV_LVL_MIN = 0x00
};
/* authen types */
enum
{
TAC_PLUS_AUTHEN_TYPE_ASCII = 0x01, /* ascii */
TAC_PLUS_AUTHEN_TYPE_PAP = 0x02, /* pap */
TAC_PLUS_AUTHEN_TYPE_CHAP = 0x03, /* chap */
TAC_PLUS_AUTHEN_TYPE_ARAP = 0x04, /* arap */
TAC_PLUS_AUTHEN_TYPE_MSCHAP = 0x05 /* mschap */
};
/* authen services */
enum
{
TAC_PLUS_AUTHEN_SVC_NONE = 0x00,
TAC_PLUS_AUTHEN_SVC_LOGIN = 0x01,
TAC_PLUS_AUTHEN_SVC_ENABLE = 0x02,
TAC_PLUS_AUTHEN_SVC_PPP = 0x03,
TAC_PLUS_AUTHEN_SVC_ARAP = 0x04,
TAC_PLUS_AUTHEN_SVC_PT = 0x05,
TAC_PLUS_AUTHEN_SVC_RCMD = 0x06,
TAC_PLUS_AUTHEN_SVC_X25 = 0x07,
TAC_PLUS_AUTHEN_SVC_NASI = 0x08,
TAC_PLUS_AUTHEN_SVC_FWPROXY = 0x09
};
/* status of reply packet, that client get from server in authen */
enum
{
TAC_PLUS_AUTHEN_STATUS_PASS = 0x01,
TAC_PLUS_AUTHEN_STATUS_FAIL = 0x02,
TAC_PLUS_AUTHEN_STATUS_GETDATA = 0x03,
TAC_PLUS_AUTHEN_STATUS_GETUSER = 0x04,
TAC_PLUS_AUTHEN_STATUS_GETPASS = 0x05,
TAC_PLUS_AUTHEN_STATUS_RESTART = 0x06,
TAC_PLUS_AUTHEN_STATUS_ERROR = 0x07,
TAC_PLUS_AUTHEN_STATUS_FOLLOW = 0x21
};
/* Authen reply Flags */
#define TAC_PLUS_REPLY_FLAG_NOECHO 0x01
/* Authen continue Flags */
#define TAC_PLUS_CONTINUE_FLAG_ABORT 0x01
/* methods of authentication */
enum {
TAC_PLUS_AUTHEN_METH_NOT_SET = 0x00,
TAC_PLUS_AUTHEN_METH_NONE = 0x01,
TAC_PLUS_AUTHEN_METH_KRB5 = 0x02,
TAC_PLUS_AUTHEN_METH_LINE = 0x03,
TAC_PLUS_AUTHEN_METH_ENABLE = 0x04,
TAC_PLUS_AUTHEN_METH_LOCAL = 0x05,
TAC_PLUS_AUTHEN_METH_TACACSPLUS = 0x06,
TAC_PLUS_AUTHEN_METH_GUEST = 0x08,
TAC_PLUS_AUTHEN_METH_RADIUS = 0x10,
TAC_PLUS_AUTHEN_METH_KRB4 = 0x11,
TAC_PLUS_AUTHEN_METH_RCMD = 0x20
};
/* authorization status */
enum
{
TAC_PLUS_AUTHOR_STATUS_PASS_ADD = 0x01,
TAC_PLUS_AUTHOR_STATUS_PASS_REPL = 0x02,
TAC_PLUS_AUTHOR_STATUS_FAIL = 0x10,
TAC_PLUS_AUTHOR_STATUS_ERROR = 0x11,
TAC_PLUS_AUTHOR_STATUS_FOLLOW = 0x21
};
/* accounting flag */
enum
{
TAC_PLUS_ACCT_FLAG_MORE = 0x1, /* deprecated */
TAC_PLUS_ACCT_FLAG_START = 0x2,
TAC_PLUS_ACCT_FLAG_STOP = 0x4,
TAC_PLUS_ACCT_FLAG_WATCHDOG = 0x8
};
/* accounting status */
enum {
TAC_PLUS_ACCT_STATUS_SUCCESS = 0x01,
TAC_PLUS_ACCT_STATUS_ERROR = 0x02,
TAC_PLUS_ACCT_STATUS_FOLLOW = 0x21
};
/* Header offsets */
#define H_VER_OFF (0)
#define H_TYPE_OFF (H_VER_OFF+1)
#define H_SEQ_NO_OFF (H_TYPE_OFF+1)
#define H_FLAGS_OFF (H_SEQ_NO_OFF+1)
#define H_SESSION_ID_OFF (H_FLAGS_OFF+1)
#define H_LENGTH_OFF (H_SESSION_ID_OFF+4)
#define TACPLUS_BODY_OFF 0
/* authen START offsets */
#define AUTHEN_S_ACTION_OFF (TACPLUS_BODY_OFF)
#define AUTHEN_S_PRIV_LVL_OFF (AUTHEN_S_ACTION_OFF+1)
#define AUTHEN_S_AUTHEN_TYPE_OFF (AUTHEN_S_PRIV_LVL_OFF+1)
#define AUTHEN_S_SERVICE_OFF (AUTHEN_S_AUTHEN_TYPE_OFF+1)
#define AUTHEN_S_USER_LEN_OFF (AUTHEN_S_SERVICE_OFF+1)
#define AUTHEN_S_PORT_LEN_OFF (AUTHEN_S_USER_LEN_OFF+1)
#define AUTHEN_S_REM_ADDR_LEN_OFF (AUTHEN_S_PORT_LEN_OFF+1)
#define AUTHEN_S_DATA_LEN_OFF (AUTHEN_S_REM_ADDR_LEN_OFF+1)
#define AUTHEN_S_VARDATA_OFF (AUTHEN_S_DATA_LEN_OFF+1) /* variable data offset (user, port, etc ) */
/* authen REPLY fields offset */
#define AUTHEN_R_STATUS_OFF (TACPLUS_BODY_OFF)
#define AUTHEN_R_FLAGS_OFF (AUTHEN_R_STATUS_OFF+1)
#define AUTHEN_R_SRV_MSG_LEN_OFF (AUTHEN_R_FLAGS_OFF+1)
#define AUTHEN_R_DATA_LEN_OFF (AUTHEN_R_SRV_MSG_LEN_OFF+2)
#define AUTHEN_R_VARDATA_OFF (AUTHEN_R_DATA_LEN_OFF+2)
/* authen CONTINUE fields offset */
#define AUTHEN_C_USER_LEN_OFF (TACPLUS_BODY_OFF)
#define AUTHEN_C_DATA_LEN_OFF (AUTHEN_C_USER_LEN_OFF+2)
#define AUTHEN_C_FLAGS_OFF (AUTHEN_C_DATA_LEN_OFF+2)
#define AUTHEN_C_VARDATA_OFF (AUTHEN_C_FLAGS_OFF+1)
/* acct REQUEST fields offsets */
#define ACCT_Q_FLAGS_OFF (TACPLUS_BODY_OFF)
#define ACCT_Q_METHOD_OFF (ACCT_Q_FLAGS_OFF+1)
#define ACCT_Q_PRIV_LVL_OFF (ACCT_Q_METHOD_OFF+1)
#define ACCT_Q_AUTHEN_TYPE_OFF (ACCT_Q_PRIV_LVL_OFF+1)
#define ACCT_Q_SERVICE_OFF (ACCT_Q_AUTHEN_TYPE_OFF+1)
#define ACCT_Q_USER_LEN_OFF (ACCT_Q_SERVICE_OFF+1)
#define ACCT_Q_PORT_LEN_OFF (ACCT_Q_USER_LEN_OFF+1)
#define ACCT_Q_REM_ADDR_LEN_OFF (ACCT_Q_PORT_LEN_OFF+1)
#define ACCT_Q_ARG_CNT_OFF (ACCT_Q_REM_ADDR_LEN_OFF+1)
#define ACCT_Q_VARDATA_OFF (ACCT_Q_ARG_CNT_OFF+1)
/* acct REPLY fields offsets */
#define ACCT_R_SRV_MSG_LEN_OFF (TACPLUS_BODY_OFF)
#define ACCT_R_DATA_LEN_OFF (ACCT_R_SRV_MSG_LEN_OFF+2)
#define ACCT_R_STATUS_OFF (ACCT_R_DATA_LEN_OFF+2)
#define ACCT_R_VARDATA_OFF (ACCT_R_STATUS_OFF+1)
/* AUTHORIZATION */
/* Request */
#define AUTHOR_Q_AUTH_METH_OFF (TACPLUS_BODY_OFF)
#define AUTHOR_Q_PRIV_LVL_OFF (AUTHOR_Q_AUTH_METH_OFF+1)
#define AUTHOR_Q_AUTHEN_TYPE_OFF (AUTHOR_Q_PRIV_LVL_OFF+1)
#define AUTHOR_Q_SERVICE_OFF (AUTHOR_Q_AUTHEN_TYPE_OFF+1)
#define AUTHOR_Q_USER_LEN_OFF (AUTHOR_Q_SERVICE_OFF+1)
#define AUTHOR_Q_PORT_LEN_OFF (AUTHOR_Q_USER_LEN_OFF+1)
#define AUTHOR_Q_REM_ADDR_LEN_OFF (AUTHOR_Q_PORT_LEN_OFF+1)
#define AUTHOR_Q_ARGC_OFF (AUTHOR_Q_REM_ADDR_LEN_OFF+1)
#define AUTHOR_Q_VARDATA_OFF (AUTHOR_Q_ARGC_OFF+1)
/* Reply */
#define AUTHOR_R_STATUS_OFF (TACPLUS_BODY_OFF)
#define AUTHOR_R_ARGC_OFF (AUTHOR_R_STATUS_OFF+1)
#define AUTHOR_R_SRV_MSG_LEN_OFF (AUTHOR_R_ARGC_OFF+1)
#define AUTHOR_R_DATA_LEN_OFF (AUTHOR_R_SRV_MSG_LEN_OFF+2)
#define AUTHOR_R_VARDATA_OFF (AUTHOR_R_DATA_LEN_OFF+2)
#if 0
/* Packet structures */
typedef struct {
u_char version;
u_char type;
u_char seq_no;
u_char flags;
guint32 session_id;
guint32 length;
} tacplus_pkt_hdr;
/* Authentication START packet */
typedef struct {
u_char action;
u_char priv_lvl;
u_char authen_type;
u_char service;
u_char user_len;
u_char port_len;
u_char rem_addr_len;
u_char data_len;
u_char vardata[1];
} tacplus_authen_start ;
/* Authentication CONTINUE packet */
typedef struct {
guint16 user_len;
guint16 data_len;
u_char flags;
u_char vardata[1];
} tacplus_authen_continue ;
/* Authentication REPLY packet */
typedef struct {
u_char status;
u_char flags;
guint16 srv_msg_len;
guint16 data_len;
u_char vardata[1];
} tacplus_authen_reply;
/* Authentication sub-PACKET */
typedef union {
tacplus_authen_start s; /* start */
tacplus_authen_continue c; /* continue */
tacplus_authen_reply r; /* reply (from srv) */
} tacplus_authen_pkt;
/* AUTHORIZATION request */
typedef struct {
u_char authen_method;
u_char priv_lvl;
u_char authen_type;
u_char authen_service;
u_char user_len;
u_char port_len;
u_char rem_addr_len;
u_char arg_cnt;
u_char vardata[1];
} tacplus_author_request;
typedef struct {
u_char status;
u_char arg_cnt;
guint16 srv_msg_len;
guint16 data_len;
u_char vardata[1];
} tacplus_author_reply;
typedef union {
tacplus_author_request q;
tacplus_author_reply r;
} tacplus_author_pkt;
/* ACCOUNTING request */
typedef struct {
u_char flags;
u_char authen_method;
u_char priv_lvl;
u_char authen_type;
u_char authen_service;
u_char user_len;
u_char port_len;
u_char rem_addr_len;
u_char arg_cnt;
u_char vardata[1];
} tacplus_account_request;
typedef struct {
guint16 srv_msg_len;
guint16 data_len;
u_char status;
u_char vardata[1];
} tacplus_account_reply;
typedef union {
tacplus_account_request q; /* Request */
tacplus_account_reply r; /* Reply */
} tacplus_account_pkt;
/* TACACS+ Packet */
typedef struct {
tacplus_pkt_hdr hdr;
union {
tacplus_authen_pkt authen;
tacplus_author_pkt author;
tacplus_account_pkt acct;
} body;
} tacplus_pkt;
#endif
/* From my old tacacs dissector */
static const value_string tacplus_type_vals[] = {
{TAC_PLUS_AUTHEN, "Authentication"},
{TAC_PLUS_AUTHOR, "Authorization" },
{TAC_PLUS_ACCT, "Accounting" },
{0, NULL}};
static const value_string tacplus_authen_action_vals[] = {
{TAC_PLUS_AUTHEN_LOGIN, "Inbound Login"},
{TAC_PLUS_AUTHEN_CHPASS, "Change password request"},
{TAC_PLUS_AUTHEN_SENDPASS, "Send password request"},
{TAC_PLUS_AUTHEN_SENDAUTH, "Outbound Request (SENDAUTH)"},
{0, NULL}};
#if 0
static const value_string tacplus_authen_priv_lvl_vals[] = {
{TAC_PLUS_PRIV_LVL_MAX, "LVL_MAX"},
{TAC_PLUS_PRIV_LVL_ROOT, "LVL_ROOT"},
{TAC_PLUS_PRIV_LVL_USER, "LVL_USER"},
{TAC_PLUS_PRIV_LVL_MIN, "LVL_MIN"},
{0, NULL}};
#endif
static const value_string tacplus_authen_type_vals[] = {
{TAC_PLUS_AUTHEN_TYPE_ASCII, "ASCII"},
{TAC_PLUS_AUTHEN_TYPE_PAP, "PAP"},
{TAC_PLUS_AUTHEN_TYPE_CHAP, "CHAP"},
{TAC_PLUS_AUTHEN_TYPE_ARAP, "ARAP"},
{TAC_PLUS_AUTHEN_TYPE_MSCHAP, "MS-CHAP"},
{0, NULL}};
static const value_string tacplus_authen_service_vals[] = {
{TAC_PLUS_AUTHEN_SVC_NONE, "TAC_PLUS_AUTHEN_SVC_NONE"},
{TAC_PLUS_AUTHEN_SVC_LOGIN, "Login" },
{TAC_PLUS_AUTHEN_SVC_ENABLE, "ENABLE"},
{TAC_PLUS_AUTHEN_SVC_PPP, "PPP" },
{TAC_PLUS_AUTHEN_SVC_ARAP, "ARAP" },
{TAC_PLUS_AUTHEN_SVC_PT, "TAC_PLUS_AUTHEN_SVC_PT"},
{TAC_PLUS_AUTHEN_SVC_RCMD, "TAC_PLUS_AUTHEN_SVC_RCMD"},
{TAC_PLUS_AUTHEN_SVC_X25, "TAC_PLUS_AUTHEN_SVC_X25"},
{TAC_PLUS_AUTHEN_SVC_NASI, "TAC_PLUS_AUTHEN_SVC_NASI"},
{TAC_PLUS_AUTHEN_SVC_FWPROXY, "TAC_PLUS_AUTHEN_SVC_FWPROXY"},
{0, NULL}};
static const value_string tacplus_reply_status_vals[] = {
{TAC_PLUS_AUTHEN_STATUS_PASS, "Authentication Passed"},
{TAC_PLUS_AUTHEN_STATUS_FAIL, "Authentication Failed"},
{TAC_PLUS_AUTHEN_STATUS_GETDATA, "Send Data"},
{TAC_PLUS_AUTHEN_STATUS_GETUSER, "Send Username"},
{TAC_PLUS_AUTHEN_STATUS_GETPASS, "Send Password"},
{TAC_PLUS_AUTHEN_STATUS_RESTART, "Restart Authentication Sequence"},
{TAC_PLUS_AUTHEN_STATUS_ERROR, "Unrecoverable Error"},
{TAC_PLUS_AUTHEN_STATUS_FOLLOW, "Use Alternate Server"},
{0, NULL}};
static const value_string tacplus_authen_method[] = {
{TAC_PLUS_AUTHEN_METH_NOT_SET, "NOT_SET"},
{TAC_PLUS_AUTHEN_METH_NONE, "NONE"},
{TAC_PLUS_AUTHEN_METH_KRB5, "KRB5"},
{TAC_PLUS_AUTHEN_METH_LINE, "LINE"},
{TAC_PLUS_AUTHEN_METH_ENABLE, "ENABLE"},
{TAC_PLUS_AUTHEN_METH_LOCAL, "LOCAL"},
{TAC_PLUS_AUTHEN_METH_TACACSPLUS, "TACACSPLUS"},
{TAC_PLUS_AUTHEN_METH_GUEST, "GUEST"},
{TAC_PLUS_AUTHEN_METH_RADIUS, "RADIUS"},
{TAC_PLUS_AUTHEN_METH_KRB4, "KRB4"},
{TAC_PLUS_AUTHEN_METH_RCMD, "RCMD"},
{0, NULL}};
static const value_string tacplus_author_status[] = {
{TAC_PLUS_AUTHOR_STATUS_PASS_ADD, "PASS_ADD"},
{TAC_PLUS_AUTHOR_STATUS_PASS_REPL, "PASS_REPL"},
{TAC_PLUS_AUTHOR_STATUS_FAIL, "FAIL"},
{TAC_PLUS_AUTHOR_STATUS_ERROR, "ERROR"},
{TAC_PLUS_AUTHOR_STATUS_FOLLOW, "FOLLOW"},
{0, NULL}};
static const value_string tacplus_acct_status[] = {
{TAC_PLUS_ACCT_STATUS_SUCCESS, "Success"},
{TAC_PLUS_ACCT_STATUS_ERROR, "Error"},
{TAC_PLUS_ACCT_STATUS_FOLLOW, "Follow"},
{0, NULL}};
#ifdef __TAC_ACCOUNTING__
static const value_string tacplus_acct_flags[] = {
{TAC_PLUS_ACCT_FLAG_MORE, "More (deprecated)"},
{TAC_PLUS_ACCT_FLAG_START, "Start"},
{TAC_PLUS_ACCT_FLAG_STOP, "Stop"},
{TAC_PLUS_ACCT_FLAG_WATCHDOG,"Update"},
{0, NULL}};
#endif
#endif /* __PACKET_TACACS_H__ */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
|
