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Revert "TODO epan/dissectors/asn1/kerberos/packet-kerberos-template.c new GSS flags"
[wireshark-sm.git] / epan / dissectors / packet-wifi-dpp.c
blobc566e59eb7f102595e054945089f47e3d44be05a
1 /* packet-wifi-dpp.c
2 *
3 * Wi-Fi Device Provisioning Protocol (DPP)
4 *
5 * Copyright 2017-2020 Richard Sharpe <realrichardsharpe@gmail.com>
6 * Copyright 2017-2020 The WiFi Alliance
7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10
11 /*
12 * Code and constants based on Device_Provisioning_Protocol_Specification_v1.2.9
13 */
14
15 #include "config.h"
16
17 #include <epan/packet.h>
18 #include "packet-tcp.h"
19 #include <epan/to_str.h>
20 #include <epan/expert.h>
21
22 #include "packet-wifi-dpp.h"
23 #include "packet-ieee80211.h"
24
25 extern const value_string wfa_subtype_vals[];
26
27 void proto_register_wifi_dpp(void);
28 void proto_reg_handoff_wifi_dpp(void);
29
30 static dissector_handle_t wifi_dpp_handle;
31 static dissector_handle_t wifi_dpp_tcp_handle;
32 static dissector_handle_t wifi_dpp_ie_handle;
33 static dissector_handle_t wifi_dpp_pubact_handle;
34
35 #define WIFI_DPP_TCP_PORT (7871)
36 static unsigned wifi_dpp_tcp_port = WIFI_DPP_TCP_PORT;
37
38 enum {
39 DPP_STATUS_OK = 0,
40 DPP_STATUS_NOT_COMPATIBLE = 1,
41 DPP_STATUS_AUTH_FAILURE = 2,
42 DPP_STATUS_UNWRAP_FAILURE = 3,
43 DPP_STATUS_BAD_GROUP = 4,
44 DPP_STATUS_CONFIGURE_FAILURE = 5,
45 DPP_STATUS_RESPONSE_PENDING = 6,
46 DPP_STATUS_INVALID_CONNECTOR = 7,
47 DPP_STATUS_NO_MATCH = 8,
48 DPP_STATUS_CONFIG_REJECTED = 9,
49 DPP_STATUS_NO_AP = 10,
50 DPP_STATUS_CONFIGURE_PENDING = 11,
51 DPP_STATUS_CSR_NEEDED = 12,
52 DPP_STATUS_CSR_BAD = 13
53 };
54
55 static const value_string dpp_status_codes[] = {
56 { DPP_STATUS_OK, "OK" },
57 { DPP_STATUS_NOT_COMPATIBLE, "Not Compatible" },
58 { DPP_STATUS_AUTH_FAILURE, "Auth Failure" },
59 { DPP_STATUS_UNWRAP_FAILURE, "Unwrap Failure" },
60 { DPP_STATUS_BAD_GROUP, "Bad Group" },
61 { DPP_STATUS_CONFIGURE_FAILURE, "Configure Failure" },
62 { DPP_STATUS_RESPONSE_PENDING, "Response Pending" },
63 { DPP_STATUS_INVALID_CONNECTOR, "Invalid Connector" },
64 { DPP_STATUS_NO_MATCH, "No Match" },
65 { DPP_STATUS_CONFIG_REJECTED, "Enrollee rejected the config" },
66 { DPP_STATUS_NO_AP, "Enrollee failed to discover an AP" },
67 { DPP_STATUS_CONFIGURE_PENDING, "Configuration response is not ready yet. The enrollee needs to request again." },
68 { DPP_STATUS_CSR_NEEDED, "Configuration requires a Certificate Signing Request. Enrollee needs to request again." },
69 { DPP_STATUS_CSR_BAD, "The Certificate Signing Request was invalid." },
70 { DPP_STATUS_OK, "OK" },
71 { DPP_STATUS_NOT_COMPATIBLE, "Not Compatible" },
72 { DPP_STATUS_AUTH_FAILURE, "Auth Failure" },
73 { DPP_STATUS_UNWRAP_FAILURE, "Unwrap Failure" },
74 { DPP_STATUS_BAD_GROUP, "Bad Group" },
75 { DPP_STATUS_CONFIGURE_FAILURE, "Configure Failure" },
76 { DPP_STATUS_RESPONSE_PENDING, "Response Pending" },
77 { 0, NULL }
78 };
79
80 enum {
81 DPP_STATUS = 0x1000,
82 DPP_INITIATOR_BOOTSTRAPPING_KEY_HASH = 0x1001,
83 DPP_RESPONDER_BOOTSTRAPPING_KEY_HASH = 0x1002,
84 DPP_INITIATOR_PROTOCOL_KEY = 0x1003,
85 DPP_WRAPPED_DATA = 0x1004,
86 DPP_INITIATOR_NONCE = 0x1005,
87 DPP_INITIATOR_CAPABILITIES = 0x1006,
88 DPP_RESPONDER_NONCE = 0x1007,
89 DPP_RESPONDER_CAPABILITIES = 0x1008,
90 DPP_RESPONDER_PROTOCOL_KEY = 0x1009,
91 DPP_INITIATOR_AUTHENTICATING_TAG = 0x100A,
92 DPP_RESPONDER_AUTHENTICATING_TAG = 0x100B,
93 DPP_CONFIGURATION_OBJECT = 0x100C,
94 DPP_CONNECTOR = 0x100D,
95 DPP_CONFIGURATION_ATTRIBUTES_OBJECT = 0x100E,
96 DPP_BOOTSTRAPPING_KEY = 0x100F,
97 DPP_FINITE_CYCLIC_GROUP = 0x1012,
98 DPP_ENCRYPTED_KEY = 0x1013,
99 DPP_ENROLLEE_NONCE = 0x1014,
100 DPP_CODE_IDENTIFIER = 0x1015,
101 DPP_TRANSACTION_ID = 0x1016,
102 DPP_BOOTSTRAPPING_INFO = 0x1017,
103 DPP_CHANNEL = 0x1018,
104 DPP_PROTOCOL_VERSION = 0x1019,
105 DPP_ENVELOPEDATA = 0x101A,
106 DPP_SENDCONNSTATUS = 0x101B,
107 DPP_CONNSTATUS = 0x101C,
108 DPP_RECONFIG_FLAGS = 0x101D,
109 DPP_C_SIGN_KEY_HASH = 0x101E,
110 DPP_CSR_ATTRIBUTES_REQUEST = 0x101F,
111 DPP_A_NONCE = 0x1020,
112 DPP_E_PRIME_ID = 0x1021
113 };
114
115 static const value_string dpp_ie_attr_ids[] = {
116 { DPP_STATUS, "DPP Status" },
117 { DPP_INITIATOR_BOOTSTRAPPING_KEY_HASH, "DPP Initiator Bootstrapping Key Hash" },
118 { DPP_RESPONDER_BOOTSTRAPPING_KEY_HASH, "DPP Responder Bootstrapping Key Hash" },
119 { DPP_INITIATOR_PROTOCOL_KEY, "DPP Initiator Protocol Key" },
120 { DPP_WRAPPED_DATA, "DPP Primary Wrapped Data" },
121 { DPP_INITIATOR_NONCE, "DPP Initiator Nonce" },
122 { DPP_INITIATOR_CAPABILITIES, "DPP Initiator Capabilities" },
123 { DPP_RESPONDER_NONCE, "DPP Responder Nonce" },
124 { DPP_RESPONDER_CAPABILITIES, "DPP Responder Capabilities" },
125 { DPP_RESPONDER_PROTOCOL_KEY, "DPP Responder Protocol Key" },
126 { DPP_INITIATOR_AUTHENTICATING_TAG, "DPP Initiator Authenticating Tag" },
127 { DPP_RESPONDER_AUTHENTICATING_TAG, "DPP Responder Authenticating Tag" },
128 { DPP_CONFIGURATION_OBJECT, "DPP Configuration Object" },
129 { DPP_CONNECTOR, "DPP Connector" },
130 { DPP_CONFIGURATION_ATTRIBUTES_OBJECT, "DPP Configuration Attributes Object" },
131 { DPP_BOOTSTRAPPING_KEY, "DPP Bootstrapping Key" },
132 { DPP_FINITE_CYCLIC_GROUP, "DPP Finite Cyclic Group" },
133 { DPP_ENCRYPTED_KEY, "DPP Encrypted Key" },
134 { DPP_CODE_IDENTIFIER, "DPP Code Identifier" },
135 { DPP_TRANSACTION_ID, "DPP Transaction ID" },
136 { DPP_BOOTSTRAPPING_INFO, "DPP Bootstrapping Info" },
137 { DPP_CHANNEL, "DPP Channel" },
138 { DPP_PROTOCOL_VERSION, "DPP Protocol Version" },
139 { DPP_ENVELOPEDATA, "DPP Enveloped Data" },
140 { DPP_SENDCONNSTATUS, "DPP Send Conn Status" },
141 { DPP_CONNSTATUS, "DPP Conn Status" },
142 { DPP_RECONFIG_FLAGS, "DPP Reconfig Flags" },
143 { DPP_C_SIGN_KEY_HASH, "DPP C-sign key Hash" },
144 { DPP_CSR_ATTRIBUTES_REQUEST, "DPP CSR Attributes Request" },
145 { DPP_A_NONCE, "DPP A-NONCE" },
146 { DPP_E_PRIME_ID, "DPP E'-id" },
147 { 0, NULL }
148 };
149
150 enum {
151 DPP_AUTHENTICATION_REQUEST = 0,
152 DPP_AUTHENTICATION_RESPONSE = 1,
153 DPP_AUTHENTICATION_CONFIRM = 2,
154 DPP_PEER_DISCOVERY_REQUEST = 5,
155 DPP_PEER_DISCOVERY_RESPONSE = 6,
156 DPP_PKEX_EXCHANGE_REQUEST = 7,
157 DPP_PKEX_EXCHANGE_RESPONSE = 8,
158 DPP_PKEX_COMMIT_REVEAL_REQUEST = 9,
159 DPP_PKEX_COMMIT_REVEAL_RESPONSE = 10,
160 DPP_CONFIGURATION_RESULT = 11,
161 DPP_CONNECTION_STATUS_RESULT = 12,
162 DPP_PRESENCE_ANNOUNCEMENT = 13,
163 DPP_RECONFIG_ANNOUNCEMENT = 14,
164 DPP_RECONFIG_AUTH_REQUEST = 15,
165 DPP_RECONFIG_AUTH_RESPONSE = 16,
166 DPP_RECONFIG_AUTH_CONFIRM = 17
167 };
168
169 static const value_string dpp_public_action_subtypes[] = {
170 { DPP_AUTHENTICATION_REQUEST, "Authentication Request" },
171 { DPP_AUTHENTICATION_RESPONSE, "Authentication Response" },
172 { DPP_AUTHENTICATION_CONFIRM, "Authentication Confirm" },
173 { DPP_PEER_DISCOVERY_REQUEST, "Peer Discovery Request" },
174 { DPP_PEER_DISCOVERY_RESPONSE, "Peer Discovery Response" },
175 { DPP_PKEX_EXCHANGE_REQUEST, "PKEX Exchange Request" },
176 { DPP_PKEX_EXCHANGE_RESPONSE, "PKEX Exchange Response" },
177 { DPP_PKEX_COMMIT_REVEAL_REQUEST, "PKEX Commit-Reveal Request" },
178 { DPP_PKEX_COMMIT_REVEAL_RESPONSE, "PKEX Commit-Reveal Response" },
179 { DPP_CONFIGURATION_RESULT, "Configuration Result" },
180 { DPP_CONNECTION_STATUS_RESULT, "Connection Status Result" },
181 { DPP_PRESENCE_ANNOUNCEMENT, "Presence Announcement" },
182 { DPP_RECONFIG_ANNOUNCEMENT, "Reconfig Announcement" },
183 { DPP_RECONFIG_AUTH_REQUEST, "Reconfig Authentication Request" },
184 { DPP_RECONFIG_AUTH_RESPONSE, "Reconfig Authentication Response" },
185 { DPP_RECONFIG_AUTH_CONFIRM, "Reconfig Authentication Confirm" },
186 { 0, NULL }
187 };
188
189 /*
190 * This table and the one above share values ... but this one is truncated.
191 */
192 static const value_string dpp_action_subtypes[] = {
193 { DPP_AUTHENTICATION_REQUEST, "Authentication Request" },
194 { DPP_AUTHENTICATION_RESPONSE, "Authentication Response" },
195 { DPP_AUTHENTICATION_CONFIRM, "Authentication Confirm" },
196 { DPP_PEER_DISCOVERY_REQUEST, "Peer Discovery Request" },
197 { DPP_PEER_DISCOVERY_RESPONSE, "Peer Discovery Response" },
198 { 0, NULL }
199 };
200
201 static const range_string dpp_protocol_version_rvals[] = {
202 { 0, 0, "Reserved" },
203 { 1, 1, "1.0" },
204 { 2, 255, "Reserved" },
205 { 0, 0, NULL }
206 };
207
208 static int proto_wifi_dpp;
209
210 static int ett_wifi_dpp_ie_generic;
211 static int ett_wifi_dpp_attributes;
212 static int ett_wifi_dpp_pa;
213 static int ett_wifi_dpp_attribute;
214 static int ett_wifi_dpp_attr_header;
215 static int ett_wifi_dpp_attr_value;
216
217 static int hf_wifi_dpp_ie_attr_id;
218 static int hf_wifi_dpp_ie_attr_len;
219 static int hf_wifi_dpp_ie_generic; /* Remove eventually */
220 static int hf_wifi_dpp_action_dialog_token;
221 static int hf_wifi_dpp_action_subtype;
222 static int hf_wifi_dpp_crypto_suite;
223 static int hf_wifi_dpp_public_action_subtype;
224 static int hf_wifi_dpp_init_hash;
225 static int hf_wifi_dpp_resp_hash;
226 static int hf_wifi_dpp_status;
227 static int hf_wifi_dpp_key_x;
228 static int hf_wifi_dpp_key_y;
229 static int hf_wifi_dpp_trans_id;
230 static int hf_wifi_dpp_finite_cyclic_group;
231 static int hf_wifi_dpp_capabilities;
232 static int hf_wifi_dpp_code_identifier;
233 static int hf_wifi_dpp_enc_key_attribute;
234 static int hf_wifi_dpp_primary_wrapped_data;
235 static int hf_wifi_dpp_connector_attr;
236 static int hf_wifi_dpp_initiator_nonce;
237 static int hf_wifi_dpp_operating_class;
238 static int hf_wifi_dpp_channel;
239 static int hf_wifi_dpp_protocol_version;
240 static int hf_wifi_dpp_a_nonce;
241 static int hf_wifi_dpp_e_prime_id;
242 static int hf_wifi_dpp_unknown_anqp_item;
243
244 static int hf_wifi_dpp_tcp_pdu_length;
245 static int hf_wifi_dpp_tcp_pdu_action_field;
246 static int hf_wifi_dpp_tcp_oui;
247 static int hf_wifi_dpp_tcp_oui_type;
248 static int hf_wifi_dpp_tcp_dialog_token;
249 static int hf_wifi_dpp_tcp_adv_proto_elt;
250 static int hf_wifi_dpp_tcp_vendor_specific;
251 static int hf_wifi_dpp_tcp_vendor_spec_len;
252 static int hf_wifi_dpp_tcp_config;
253 static int hf_wifi_dpp_tcp_query_req_len;
254 static int hf_wifi_dpp_tcp_status_code;
255 static int hf_wifi_dpp_gas_query_resp_frag_id;
256 static int hf_wifi_dpp_tcp_comeback_delay;
257 static int hf_wifi_dpp_tcp_query_resp_len;
258
259 static int
260 dissect_wifi_dpp(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
261 {
262 int offset = 0;
263
264 proto_tree_add_item(tree, hf_wifi_dpp_unknown_anqp_item, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA);
265 return tvb_captured_length(tvb);
266 }
267
268 static int
269 dissect_wifi_dpp_ie(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
270 {
271 proto_item *ie;
272 unsigned remaining_len = tvb_reported_length(tvb);
273
274 ie = proto_tree_add_subtree(tree, tvb, 0, remaining_len, ett_wifi_dpp_ie_generic, NULL, "Generic DPP IE");
275 proto_tree_add_item(ie, hf_wifi_dpp_ie_generic, tvb, 0, remaining_len,
276 ENC_NA);
277 return tvb_captured_length(tvb);
278 }
279
280 static int
281 dissect_wifi_dpp_attributes(packet_info *pinfo _U_, proto_tree *tree,
282 tvbuff_t *tvb, int offset _U_)
283 {
284 proto_item *si = NULL;
285 uint8_t status;
286 proto_tree *attr, *specific_attr, *attr_hdr;
287 uint16_t attribute_id;
288 uint16_t attribute_len;
289 unsigned attributes_len = 0;
290 unsigned remaining_len = tvb_reported_length_remaining(tvb, offset);
291
292 while (remaining_len) {
293 attribute_id = tvb_get_uint16(tvb, offset, ENC_LITTLE_ENDIAN);
294 attribute_len = tvb_get_uint16(tvb, offset + 2, ENC_LITTLE_ENDIAN);
295 attr = proto_tree_add_subtree_format(tree, tvb, offset,
296 attribute_len + 4, ett_wifi_dpp_attribute,
297 &si, "%s Attribute",
298 val_to_str(attribute_id,
299 dpp_ie_attr_ids,
300 "Unknown (%u)"));
301 attr_hdr = proto_tree_add_subtree(attr, tvb, offset, 4,
302 ett_wifi_dpp_attr_header, NULL,
303 "Attribute Header");
304
305 proto_tree_add_item(attr_hdr, hf_wifi_dpp_ie_attr_id, tvb, offset, 2,
306 ENC_LITTLE_ENDIAN);
307 offset += 2;
308 proto_tree_add_item(attr_hdr, hf_wifi_dpp_ie_attr_len, tvb, offset, 2,
309 ENC_LITTLE_ENDIAN);
310 offset += 2;
311
312 specific_attr = proto_tree_add_subtree(attr, tvb, offset, attribute_len,
313 ett_wifi_dpp_attr_value,
314 NULL, "Attribute Value");
315
316 switch (attribute_id) {
317 case DPP_STATUS:
318 status = tvb_get_uint8(tvb, offset);
319 proto_item_append_text(si, ": %s", val_to_str(status,
320 dpp_status_codes,
321 "Unknown (%u)"));
322 proto_tree_add_item(specific_attr, hf_wifi_dpp_status, tvb, offset, attribute_len, ENC_LITTLE_ENDIAN);
323 break;
324
325 case DPP_INITIATOR_BOOTSTRAPPING_KEY_HASH:
326 proto_tree_add_item(specific_attr, hf_wifi_dpp_init_hash, tvb, offset, attribute_len, ENC_NA);
327 break;
328
329 case DPP_RESPONDER_BOOTSTRAPPING_KEY_HASH:
330 proto_tree_add_item(specific_attr, hf_wifi_dpp_resp_hash, tvb, offset, attribute_len, ENC_NA);
331 break;
332
333 case DPP_RESPONDER_PROTOCOL_KEY:
334 case DPP_INITIATOR_PROTOCOL_KEY:
335 // This is two protocol keys of equal length, X then Y.
336 proto_tree_add_item(specific_attr, hf_wifi_dpp_key_x, tvb, offset, attribute_len/2, ENC_NA);
337 proto_tree_add_item(specific_attr, hf_wifi_dpp_key_y, tvb, offset + attribute_len/2, attribute_len/2, ENC_NA);
338 break;
339
340 case DPP_TRANSACTION_ID:
341 proto_tree_add_item(specific_attr, hf_wifi_dpp_trans_id, tvb, offset, 1, ENC_LITTLE_ENDIAN);
342 break;
343
344 case DPP_FINITE_CYCLIC_GROUP:
345 case DPP_RESPONDER_CAPABILITIES:
346 proto_tree_add_item(specific_attr, hf_wifi_dpp_finite_cyclic_group, tvb, offset, 2, ENC_LITTLE_ENDIAN);
347 break;
348
349 case DPP_INITIATOR_CAPABILITIES:
350 proto_tree_add_item(specific_attr, hf_wifi_dpp_capabilities, tvb, offset, 1, ENC_LITTLE_ENDIAN);
351 break;
352
353 case DPP_CODE_IDENTIFIER:
354 proto_tree_add_item(specific_attr, hf_wifi_dpp_code_identifier, tvb, offset, attribute_len, ENC_UTF_8);
355 break;
356
357 case DPP_ENCRYPTED_KEY:
358 proto_tree_add_item(specific_attr, hf_wifi_dpp_enc_key_attribute, tvb, offset, attribute_len, ENC_NA);
359 break;
360
361 case DPP_WRAPPED_DATA:
362 proto_tree_add_item(specific_attr, hf_wifi_dpp_primary_wrapped_data, tvb, offset, attribute_len, ENC_NA);
363 break;
364
365 case DPP_CONNECTOR:
366 proto_tree_add_item(specific_attr, hf_wifi_dpp_connector_attr, tvb,
367 offset, attribute_len, ENC_NA);
368 break;
369
370 case DPP_INITIATOR_NONCE:
371 proto_tree_add_item(specific_attr, hf_wifi_dpp_initiator_nonce, tvb,
372 offset, attribute_len, ENC_NA);
373 break;
374
375 case DPP_CHANNEL:
376 proto_tree_add_item(specific_attr, hf_wifi_dpp_operating_class, tvb,
377 offset, 1, ENC_NA);
378 proto_tree_add_item(specific_attr, hf_wifi_dpp_channel, tvb, offset + 1,
379 1, ENC_NA);
380 break;
381
382 case DPP_PROTOCOL_VERSION:
383 proto_tree_add_item(specific_attr, hf_wifi_dpp_protocol_version, tvb,
384 offset, 1, ENC_NA);
385 break;
386
387 case DPP_A_NONCE:
388 proto_tree_add_item(specific_attr, hf_wifi_dpp_a_nonce, tvb, offset,
389 attribute_len, ENC_NA);
390 break;
391
392 case DPP_E_PRIME_ID:
393 proto_tree_add_item(specific_attr, hf_wifi_dpp_e_prime_id, tvb, offset,
394 attribute_len, ENC_NA);
395 break;
396
397 case DPP_INITIATOR_AUTHENTICATING_TAG:
398
399 case DPP_RESPONDER_AUTHENTICATING_TAG:
400
401 case DPP_CONFIGURATION_OBJECT:
402
403 case DPP_CONFIGURATION_ATTRIBUTES_OBJECT:
404
405 case DPP_BOOTSTRAPPING_KEY:
406
407 case DPP_ENROLLEE_NONCE:
408
409 default:
410 proto_tree_add_item(specific_attr, hf_wifi_dpp_ie_generic, tvb, offset, attribute_len, ENC_NA);
411 break;
412 }
413
414 offset += attribute_len;
415 attributes_len += attribute_len + 4;
416 remaining_len -= (attribute_len + 4);
417
418 }
419
420 return attributes_len; // We return the attribute length plus hdr!
421 }
422
423 int
424 dissect_wifi_dpp_config_proto(packet_info *pinfo _U_, proto_tree *tree,
425 tvbuff_t *tvb, int offset _U_)
426 {
427 proto_item *dpp_item;
428 proto_tree *dpp_tree, *attr_tree;
429 unsigned remaining_len = tvb_reported_length_remaining(tvb, offset);
430
431 dpp_item = proto_tree_add_item(tree, proto_wifi_dpp, tvb, offset, -1, ENC_NA);
432 dpp_tree = proto_item_add_subtree(dpp_item, ett_wifi_dpp_pa);
433 proto_item_append_text(dpp_item, " Configuration");
434
435 attr_tree = proto_tree_add_subtree_format(dpp_tree, tvb, offset,
436 remaining_len,
437 ett_wifi_dpp_attributes, NULL,
438 "DPP Attributes");
439
440 offset = dissect_wifi_dpp_attributes(pinfo, attr_tree, tvb, offset);
441
442 return offset;
443 }
444
445 int
446 dissect_wifi_dpp_public_action(tvbuff_t *tvb, packet_info *pinfo,
447 proto_tree *tree, void *data _U_)
448 {
449 uint8_t subtype;
450 unsigned remaining_len;
451 proto_item *dpp_item;
452 proto_tree *dpp_tree, *attr_tree;
453 uint16_t attributes_len;
454 int offset = 0;
455
456 col_set_str(pinfo->cinfo, COL_PROTOCOL, "wifi_dpp");
457
458 /* The Crypto suite comes before the DPP frame type */
459 subtype = tvb_get_uint8(tvb, offset + 1);
460 col_append_fstr(pinfo->cinfo, COL_INFO, ", DPP - %s",
461 val_to_str(subtype, dpp_public_action_subtypes,
462 "Unknown (%u)"));
463
464 remaining_len = tvb_reported_length_remaining(tvb, offset);
465
466 dpp_item = proto_tree_add_item(tree, proto_wifi_dpp, tvb, offset, -1, ENC_NA);
467 dpp_tree = proto_item_add_subtree(dpp_item, ett_wifi_dpp_pa);
468 proto_item_append_text(dpp_item, ": %s", val_to_str(subtype,
469 dpp_public_action_subtypes,
470 "Unknown (%u)"));
471 proto_tree_add_item(dpp_tree, hf_wifi_dpp_crypto_suite, tvb, offset, 1,
472 ENC_LITTLE_ENDIAN);
473 offset++;
474 remaining_len--;
475
476 proto_tree_add_item(dpp_tree, hf_wifi_dpp_public_action_subtype, tvb, offset,
477 1, ENC_LITTLE_ENDIAN);
478 offset++; /* Skip the OUI Subtype/DPP Request type */
479 remaining_len--;
480 if (remaining_len) {
481 attr_tree = proto_tree_add_subtree_format(dpp_tree, tvb, offset,
482 remaining_len,
483 ett_wifi_dpp_attributes, NULL, "DPP Attributes");
484
485 attributes_len = dissect_wifi_dpp_attributes(pinfo, attr_tree, tvb, offset);
486 offset += attributes_len;
487 }
488
489 return offset;
490 }
491
492 static int
493 dissect_wifi_dpp_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo _U_,
494 proto_tree *tree, void *data _U_)
495 {
496 int offset = 0;
497 uint8_t action;
498 tvbuff_t *newtvb;
499
500 col_set_str(pinfo->cinfo, COL_PROTOCOL, "dpp");
501
502 /*
503 * We get a length, followed by Action field, OUI, OUI type and then a
504 * DPP public action
505 */
506 proto_tree_add_item(tree, hf_wifi_dpp_tcp_pdu_length, tvb, offset, 4,
507 ENC_BIG_ENDIAN);
508 offset += 4;
509
510 action = tvb_get_uint8(tvb, offset);
511 proto_tree_add_item(tree, hf_wifi_dpp_tcp_pdu_action_field, tvb, offset, 1,
512 ENC_NA);
513 offset += 1;
514
515 if (action == 0x09) {
516 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui, tvb, offset, 3, ENC_NA);
517 offset += 3;
518
519 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui_type, tvb, offset, 1, ENC_NA);
520 offset += 1;
521
522 newtvb = tvb_new_subset_remaining(tvb, offset);
523
524 offset += dissect_wifi_dpp_public_action(newtvb, pinfo, tree, NULL);
525 } else if (action == 0x0a) {
526 col_append_str(pinfo->cinfo, COL_INFO, ", DPP - Configuration Request");
527
528 proto_tree_add_item(tree, hf_wifi_dpp_tcp_dialog_token, tvb, offset, 1,
529 ENC_NA);
530 offset += 1;
531
532 proto_tree_add_item(tree, hf_wifi_dpp_tcp_adv_proto_elt, tvb, offset, 3,
533 ENC_NA);
534 offset += 3;
535
536 proto_tree_add_item(tree, hf_wifi_dpp_tcp_vendor_specific, tvb, offset, 1,
537 ENC_NA);
538 offset += 1;
539 proto_tree_add_item(tree, hf_wifi_dpp_tcp_vendor_spec_len, tvb, offset, 1,
540 ENC_NA);
541 offset += 1;
542
543 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui, tvb, offset, 3, ENC_NA);
544 offset += 3;
545
546 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui_type, tvb, offset, 1, ENC_NA);
547 offset += 1;
548
549 proto_tree_add_item(tree, hf_wifi_dpp_tcp_config, tvb, offset, 1, ENC_NA);
550 offset += 1;
551
552 proto_tree_add_item(tree, hf_wifi_dpp_tcp_query_req_len, tvb, offset, 2,
553 ENC_LITTLE_ENDIAN);
554 offset += 2;
555
556 offset += dissect_wifi_dpp_config_proto(pinfo, tree, tvb, offset);
557 } else if (action == 0x0b || action == 0x0d) {
558 uint16_t qr_len;
559
560 col_append_str(pinfo->cinfo, COL_INFO, ", DPP - Configuration Response");
561
562 proto_tree_add_item(tree, hf_wifi_dpp_tcp_dialog_token, tvb, offset, 1,
563 ENC_NA);
564 offset += 1;
565
566 proto_tree_add_item(tree, hf_wifi_dpp_tcp_status_code, tvb, offset, 2,
567 ENC_LITTLE_ENDIAN);
568 offset += 2;
569
570 if (action == 0x0d) {
571 proto_tree_add_item(tree, hf_wifi_dpp_gas_query_resp_frag_id, tvb, offset,
572 1, ENC_NA);
573 offset += 1;
574 }
575
576 proto_tree_add_item(tree, hf_wifi_dpp_tcp_comeback_delay, tvb, offset, 2,
577 ENC_LITTLE_ENDIAN);
578 offset += 2;
579
580 proto_tree_add_item(tree, hf_wifi_dpp_tcp_adv_proto_elt, tvb, offset, 3,
581 ENC_NA);
582 offset += 3;
583
584 proto_tree_add_item(tree, hf_wifi_dpp_tcp_vendor_specific, tvb, offset, 1,
585 ENC_NA);
586 offset += 1;
587 proto_tree_add_item(tree, hf_wifi_dpp_tcp_vendor_spec_len, tvb, offset, 1,
588 ENC_NA);
589 offset += 1;
590
591 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui, tvb, offset, 3, ENC_NA);
592 offset += 3;
593
594 proto_tree_add_item(tree, hf_wifi_dpp_tcp_oui_type, tvb, offset, 1, ENC_NA);
595 offset += 1;
596
597 proto_tree_add_item(tree, hf_wifi_dpp_tcp_config, tvb, offset, 1, ENC_NA);
598 offset += 1;
599
600 qr_len = tvb_get_letohs(tvb, offset);
601 proto_tree_add_item(tree, hf_wifi_dpp_tcp_query_resp_len, tvb, offset, 2,
602 ENC_LITTLE_ENDIAN);
603 offset += 2;
604
605 if (qr_len) {
606 offset += dissect_wifi_dpp_config_proto(pinfo, tree, tvb, offset);
607 }
608 }
609
610 return offset;
611 }
612
613 static unsigned
614 get_wifi_dpp_tcp_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset,
615 void *data _U_)
616 {
617 unsigned pkt_len;
618
619 pkt_len = tvb_get_ntohl(tvb, offset);
620
621 return pkt_len + 4;
622 }
623
624 /*
625 * We need 4 bytes for the length ...
626 */
627 #define DPP_TCP_HEADER_LEN 4
628 static int
629 dissect_wifi_dpp_tcp_pdus(tvbuff_t *tvb, packet_info *pinfo _U_,
630 proto_tree *tree, void *data _U_)
631 {
632 if (!tvb_bytes_exist(tvb, 0, DPP_TCP_HEADER_LEN))
633 return 0;
634
635 tcp_dissect_pdus(tvb, pinfo, tree, true, DPP_TCP_HEADER_LEN,
636 get_wifi_dpp_tcp_len, dissect_wifi_dpp_tcp_pdu, data);
637 return tvb_reported_length(tvb);
638 }
639
640 void
641 proto_register_wifi_dpp(void)
642 {
643 static module_t *wifi_dpp_module;
644 static hf_register_info hf[] = {
645 { &hf_wifi_dpp_status,
646 { "Wi-Fi DPP Status", "dpp.status",
647 FT_UINT8, BASE_HEX, VALS(dpp_status_codes), 0x0, NULL, HFILL }},
648 { &hf_wifi_dpp_init_hash,
649 { "Wi-Fi DPP Initiator Hash", "dpp.init.hash",
650 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
651 { &hf_wifi_dpp_resp_hash,
652 { "Wi-Fi DPP Responder Hash", "dpp.resp.hash",
653 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
654 { &hf_wifi_dpp_key_x,
655 { "Wi-Fi DPP Key X value", "dpp.key.x",
656 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
657 { &hf_wifi_dpp_key_y,
658 { "Wi-Fi DPP Key Y value", "dpp.key.y",
659 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
660 { &hf_wifi_dpp_trans_id,
661 { "Wi-Fi DPP Transaction ID", "dpp.trans_id",
662 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
663 { &hf_wifi_dpp_finite_cyclic_group,
664 { "Wi-Fi DPP Finite Cyclic Group", "dpp.finite_cyclic_group",
665 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
666 { &hf_wifi_dpp_capabilities,
667 { "Wi-Fi DPP Capabilities", "dpp.capabilities",
668 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
669 { &hf_wifi_dpp_code_identifier,
670 { "Wi-Fi DPP Code Identifier", "dpp.code_identifier",
671 FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
672 { &hf_wifi_dpp_enc_key_attribute,
673 { "Wi-Fi DPP Encrypted Key Attribute", "dpp.pkex.enckey",
674 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
675 { &hf_wifi_dpp_primary_wrapped_data,
676 { "Wi-Fi DPP Primary Wrapped Data", "dpp.primary.wrapped_data",
677 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
678 { &hf_wifi_dpp_connector_attr,
679 { "Wi-Fi DPP Connector Attribute", "dpp.connector_data",
680 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
681 { &hf_wifi_dpp_initiator_nonce,
682 { "Wi-Fi DPP Initiator Nonce", "dpp.initiator_nonce",
683 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
684 { &hf_wifi_dpp_operating_class,
685 { "Operating Class", "dpp.operating_class",
686 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
687 { &hf_wifi_dpp_channel,
688 { "Channel", "dpp.channel",
689 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
690 { &hf_wifi_dpp_protocol_version,
691 { "Protocol Version", "dpp.protocol_version",
692 FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(dpp_protocol_version_rvals),
693 0x0, NULL, HFILL }},
694 { &hf_wifi_dpp_a_nonce,
695 { "A-NONCE", "dpp.a_nonce",
696 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
697 { &hf_wifi_dpp_e_prime_id,
698 { "E'-id", "dpp.e_prime_id",
699 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
700 { &hf_wifi_dpp_ie_attr_id,
701 { "Wi-Fi DPP IE Attribute ID", "dpp.ie.attr_id",
702 FT_UINT16, BASE_HEX, VALS(dpp_ie_attr_ids), 0x0, NULL, HFILL }},
703 { &hf_wifi_dpp_ie_attr_len,
704 { "Wi-Fi DPP IE Attribute Len", "dpp.ie.attr_len",
705 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
706 { &hf_wifi_dpp_ie_generic,
707 { "Wi-Fi DPP IE generic", "dpp.ie.generic",
708 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
709 { &hf_wifi_dpp_action_subtype,
710 { "Wi-Fi DPP Action Subtype", "dpp.action.subtype",
711 FT_UINT8, BASE_DEC, VALS(dpp_action_subtypes), 0x0, NULL, HFILL }},
712 { &hf_wifi_dpp_action_dialog_token,
713 { "Wi-Fi DPP Action Dialog Token", "dpp.action.dialog_token",
714 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
715 { &hf_wifi_dpp_crypto_suite,
716 { "Wi-Fi DPP Cryptographic Suite", "dpp.public_action.crypto_suite",
717 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
718 { &hf_wifi_dpp_public_action_subtype,
719 { "Wi-Fi DPP Public Action Subtype", "dpp.public_action.subtype",
720 FT_UINT8, BASE_DEC, VALS(dpp_public_action_subtypes), 0x0, NULL, HFILL }},
721 { &hf_wifi_dpp_unknown_anqp_item,
722 { "Wi-fi DPP Unknown ANQP Item", "dpp.unknown_anqp_item",
723 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
724
725 { &hf_wifi_dpp_tcp_pdu_length,
726 { "DPP TCP PDU length", "dpp.tcp.length",
727 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
728
729 { &hf_wifi_dpp_tcp_pdu_action_field,
730 { "DPP TCP PDU Action type", "dpp.tcp.action_type",
731 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
732
733 { &hf_wifi_dpp_tcp_oui,
734 { "DPP TCP PDU OUI", "dpp.tcp.oui",
735 FT_UINT24, BASE_OUI, NULL, 0x0, NULL, HFILL }},
736
737 { &hf_wifi_dpp_tcp_oui_type,
738 { "DPP TCP PDU OUI type", "dpp.tcp.oui_type",
739 FT_UINT8, BASE_DEC, VALS(wfa_subtype_vals), 0, NULL, HFILL }},
740
741 { &hf_wifi_dpp_tcp_dialog_token,
742 { "DPP TCP PDU Dialog Token", "dpp.tcp.dialog_token",
743 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
744
745 { &hf_wifi_dpp_tcp_adv_proto_elt,
746 { "DPP TCP PDU Advertisement Protocol Element",
747 "dpp.tcp.adv_proto_elt",
748 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
749
750 { &hf_wifi_dpp_tcp_vendor_specific,
751 { "DPP TCP PDU Vendor Specific tag", "dpp.tcp.vendor_spec_tag",
752 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
753
754 { &hf_wifi_dpp_tcp_vendor_spec_len,
755 { "DPP TCP PDU Vendor Specific len", "dpp.tcp.vendor_spec_len",
756 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
757
758 { &hf_wifi_dpp_tcp_config,
759 { "DPP TCP PDU Configuration", "dpp.tcp.config",
760 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
761
762 { &hf_wifi_dpp_tcp_query_req_len,
763 { "DPP TCP PDU Query Req len", "dpp.tcp.query_req_len",
764 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
765
766 { &hf_wifi_dpp_gas_query_resp_frag_id,
767 { "DPP TCP PDU GAS Query Response Fragment ID",
768 "dpp.tp.query_resp_frag_id",
769 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
770
771 { &hf_wifi_dpp_tcp_status_code,
772 { "DPP TCP PDU Status Code", "dpp.tcp.status_code",
773 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
774
775 { &hf_wifi_dpp_tcp_comeback_delay,
776 { "DPP TCP PDU Comeback Delay", "dpp.tcp.comeback_delay",
777 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
778
779 { &hf_wifi_dpp_tcp_query_resp_len,
780 { "DPP TCP PDU Query Resp Len", "dpp.tcp.query_resp_len",
781 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
782 };
783 static int *ett[] = {
784 &ett_wifi_dpp_ie_generic,
785 &ett_wifi_dpp_attributes,
786 &ett_wifi_dpp_pa,
787 &ett_wifi_dpp_attribute,
788 &ett_wifi_dpp_attr_header,
789 &ett_wifi_dpp_attr_value,
790 };
791
792 proto_wifi_dpp = proto_register_protocol("Wi-Fi Device Provisioning Protocol", "Wi-Fi DPP", "dpp");
793 proto_register_field_array(proto_wifi_dpp, hf, array_length(hf));
794 proto_register_subtree_array(ett, array_length(ett));
795
796 /* Register the dissector handles */
797 wifi_dpp_handle = register_dissector("dpp", dissect_wifi_dpp, proto_wifi_dpp);
798 wifi_dpp_tcp_handle = register_dissector("dpp.tcp", dissect_wifi_dpp_tcp_pdus, proto_wifi_dpp);
799 wifi_dpp_ie_handle = register_dissector("dpp.ie", dissect_wifi_dpp_ie, proto_wifi_dpp);
800 wifi_dpp_pubact_handle = register_dissector("dpp.public_action", dissect_wifi_dpp_public_action, proto_wifi_dpp);
801
802 /* Register the preferred TCP port? Is there one? */
803 wifi_dpp_module = prefs_register_protocol(proto_wifi_dpp, NULL);
804 prefs_register_uint_preference(wifi_dpp_module, "tcp.port", "DPP TCP Port",
805 "The TCP port DPP over TCP uses",
806 10, &wifi_dpp_tcp_port);
807 }
808
809 void
810 proto_reg_handoff_wifi_dpp(void)
811 {
812 static bool initialized = false;
813 static int current_port;
814
815 dissector_add_uint("wlan.anqp.wifi_alliance.subtype", WFA_SUBTYPE_DPP, wifi_dpp_handle);
816 dissector_add_uint("wlan.ie.wifi_alliance.subtype", WFA_SUBTYPE_DPP, wifi_dpp_ie_handle);
817 dissector_add_uint("wlan.pa.wifi_alliance.subtype", WFA_SUBTYPE_DPP, wifi_dpp_pubact_handle);
818
819 /*
820 * Register the TCP port
821 */
822 if (!initialized) {
823 initialized = true;
824 } else {
825 dissector_delete_uint("tcp.port", current_port, wifi_dpp_tcp_handle);
826 }
827
828 current_port = wifi_dpp_tcp_port;
829 dissector_add_uint("tcp.port", current_port, wifi_dpp_tcp_handle);
830 }
831
832 /*
833 * Editor modelines
834 *
835 * Local Variables:
836 * c-basic-offset: 2
837 * tab-width: 8
838 * indent-tabs-mode: nil
839 * End:
840 *
841 * ex: set shiftwidth=2 tabstop=8 expandtab:
842 * :indentSize=2:tabSize=8:noTabs=true:
843 */
Metzes wireshark repo