2 * Routines for the Internet Security Association and Key Management Protocol
3 * (ISAKMP) (RFC 2408) and the Internet IP Security Domain of Interpretation
4 * for ISAKMP (RFC 2407)
5 * Brad Robel-Forrest <brad.robel-forrest@watchguard.com>
7 * $Id: packet-isakmp.c,v 1.59 2002/08/28 21:00:18 jmayer Exp $
9 * Ethereal - Network traffic analyzer
10 * By Gerald Combs <gerald@ethereal.com>
11 * Copyright 1998 Gerald Combs
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
37 #ifdef NEED_SNPRINTF_H
38 # include "snprintf.h"
41 #include <epan/packet.h>
44 #define isakmp_min(a, b) ((a<b) ? a : b)
46 static int proto_isakmp = -1;
48 static gint ett_isakmp = -1;
49 static gint ett_isakmp_flags = -1;
50 static gint ett_isakmp_payload = -1;
52 #define UDP_PORT_ISAKMP 500
53 #define TCP_PORT_ISAKMP 500
55 #define NUM_PROTO_TYPES 5
56 #define proto2str(t) \
57 ((t < NUM_PROTO_TYPES) ? prototypestr[t] : "UNKNOWN-PROTO-TYPE")
59 static const char *prototypestr[NUM_PROTO_TYPES] = {
67 #define NUM_P1_ATT_TYPES 17
68 #define p1_atttype2str(t) \
69 ((t < NUM_P1_ATT_TYPES) ? p1_atttypestr[t] : "UNKNOWN-ATTRIBUTE-TYPE")
71 static const char *p1_atttypestr[NUM_P1_ATT_TYPES] = {
72 "UNKNOWN-ATTRIBUTE-TYPE",
73 "Encryption-Algorithm",
75 "Authentication-Method",
79 "Group-Generator-One",
80 "Group-Generator-Two",
91 #define NUM_ATT_TYPES 11
92 #define atttype2str(t) \
93 ((t < NUM_ATT_TYPES) ? atttypestr[t] : "UNKNOWN-ATTRIBUTE-TYPE")
95 static const char *atttypestr[NUM_ATT_TYPES] = {
96 "UNKNOWN-ATTRIBUTE-TYPE",
100 "Encapsulation-Mode",
101 "Authentication-Algorithm",
104 "Compress-Dictinary-Size",
105 "Compress-Private-Algorithm",
109 #define NUM_TRANS_TYPES 2
110 #define trans2str(t) \
111 ((t < NUM_TRANS_TYPES) ? transtypestr[t] : "UNKNOWN-TRANS-TYPE")
113 static const char *transtypestr[NUM_TRANS_TYPES] = {
118 #define NUM_AH_TRANS_TYPES 8
119 #define ah_trans2str(t) \
120 ((t < NUM_AH_TRANS_TYPES) ? ah_transtypestr[t] : "UNKNOWN-AH-TRANS-TYPE")
122 static const char *ah_transtypestr[NUM_AH_TRANS_TYPES] = {
133 #define NUM_ESP_TRANS_TYPES 13
134 #define esp_trans2str(t) \
135 ((t < NUM_ESP_TRANS_TYPES) ? esp_transtypestr[t] : "UNKNOWN-ESP-TRANS-TYPE")
137 static const char *esp_transtypestr[NUM_ESP_TRANS_TYPES] = {
153 #define NUM_IPCOMP_TRANS_TYPES 5
154 #define ipcomp_trans2str(t) \
155 ((t < NUM_IPCOMP_TRANS_TYPES) ? ipcomp_transtypestr[t] : "UNKNOWN-IPCOMP-TRANS-TYPE")
157 static const char *ipcomp_transtypestr[NUM_IPCOMP_TRANS_TYPES] = {
165 #define NUM_ID_TYPES 12
167 ((t < NUM_ID_TYPES) ? idtypestr[t] : "UNKNOWN-ID-TYPE")
169 static const char *idtypestr[NUM_ID_TYPES] = {
184 #define NUM_GRPDESC_TYPES 14
185 #define grpdesc2str(t) ((t < NUM_GRPDESC_TYPES) ? grpdescstr[t] : "UKNOWEN GROUP DESCRIPTION")
187 static const char *grpdescstr[NUM_GRPDESC_TYPES] = {
189 "Default 768-bit MODP group",
190 "Alternate 1024-bit MODP group",
191 "EC2N group on GP[2^155] group",
192 "EC2N group on GP[2^185] group",
194 "EC2N group over GF[2^163]",
195 "EC2N group over GF[2^163]",
196 "EC2N group over GF[2^283]",
197 "EC2N group over GF[2^283]",
198 "EC2N group over GF[2^409]",
199 "EC2N group over GF[2^409]",
200 "EC2N group over GF[2^571]",
201 "EC2N group over GF[2^571]"
218 struct udp_encap_hdr {
219 guint8 non_esp_marker[4];
223 static proto_tree *dissect_payload_header(tvbuff_t *, int, int, guint8,
224 guint8 *, guint16 *, proto_tree *);
226 static void dissect_sa(tvbuff_t *, int, int, proto_tree *, int);
227 static void dissect_proposal(tvbuff_t *, int, int, proto_tree *, int);
228 static void dissect_transform(tvbuff_t *, int, int, proto_tree *, int);
229 static void dissect_key_exch(tvbuff_t *, int, int, proto_tree *, int);
230 static void dissect_id(tvbuff_t *, int, int, proto_tree *, int);
231 static void dissect_cert(tvbuff_t *, int, int, proto_tree *, int);
232 static void dissect_certreq(tvbuff_t *, int, int, proto_tree *, int);
233 static void dissect_hash(tvbuff_t *, int, int, proto_tree *, int);
234 static void dissect_sig(tvbuff_t *, int, int, proto_tree *, int);
235 static void dissect_nonce(tvbuff_t *, int, int, proto_tree *, int);
236 static void dissect_notif(tvbuff_t *, int, int, proto_tree *, int);
237 static void dissect_delete(tvbuff_t *, int, int, proto_tree *, int);
238 static void dissect_vid(tvbuff_t *, int, int, proto_tree *, int);
239 static void dissect_config(tvbuff_t *, int, int, proto_tree *, int);
241 static const char *payloadtype2str(guint8);
242 static const char *exchtype2str(guint8);
243 static const char *doitype2str(guint32);
244 static const char *msgtype2str(guint16);
245 static const char *situation2str(guint32);
246 static const char *value2str(int, guint16, guint16);
247 static const char *attrtype2str(guint8);
248 static const char *cfgattrident2str(guint16);
249 static const char *certtype2str(guint8);
251 static gboolean get_num(tvbuff_t *, int, guint16, guint32 *);
253 #define LOAD_TYPE_NONE 0 /* payload type for None */
254 #define LOAD_TYPE_PROPOSAL 2 /* payload type for Proposal */
255 #define LOAD_TYPE_TRANSFORM 3 /* payload type for Transform */
256 #define NUM_LOAD_TYPES 15
257 #define loadtype2str(t) \
258 ((t < NUM_LOAD_TYPES) ? strfuncs[t].str : "Unknown payload type")
260 static struct strfunc {
262 void (*func)(tvbuff_t *, int, int, proto_tree *, int);
263 } strfuncs[NUM_LOAD_TYPES] = {
265 {"Security Association", dissect_sa },
266 {"Proposal", dissect_proposal },
267 {"Transform", dissect_transform },
268 {"Key Exchange", dissect_key_exch },
269 {"Identification", dissect_id },
270 {"Certificate", dissect_cert },
271 {"Certificate Request", dissect_certreq },
272 {"Hash", dissect_hash },
273 {"Signature", dissect_sig },
274 {"Nonce", dissect_nonce },
275 {"Notification", dissect_notif },
276 {"Delete", dissect_delete },
277 {"Vendor ID", dissect_vid },
278 {"Attrib", dissect_config }
282 #define VID_MS_LEN 20
283 static const guint8 VID_MS_W2K_WXP[VID_MS_LEN] = {0x1E, 0x2B, 0x51, 0x69, 0x5, 0x99, 0x1C, 0x7D, 0x7C, 0x96, 0xFC, 0xBF, 0xB5, 0x87, 0xE4, 0x61, 0x0, 0x0, 0x0, 0x2}; /* according to http://www.microsoft.com/technet/treeview/default.asp?url=/technet/columns/cableguy/cg0602.asp */
285 #define VID_CP_LEN 20
286 static const guint8 VID_CP[VID_CP_LEN] = {0xF4, 0xED, 0x19, 0xE0, 0xC1, 0x14, 0xEB, 0x51, 0x6F, 0xAA, 0xAC, 0x0E, 0xE3, 0x7D, 0xAF, 0x28, 0x7, 0xB4, 0x38, 0x1F};
288 static const guint8 VID_CYBERGUARD[VID_LEN] = {0x9A, 0xA1, 0xF3, 0xB4, 0x34, 0x72, 0xA4, 0x5D, 0x5F, 0x50, 0x6A, 0xEB, 0x26, 0xC, 0xF2, 0x14};
290 static const guint8 VID_SAFENET[VID_LEN] = {0x44, 0x85, 0x15, 0x2D, 0x18, 0xB6, 0xBB, 0xCD, 0x0B, 0xE8, 0xA8, 0x46, 0x95, 0x79, 0xDD, 0xCC};
292 static const guint8 VID_draft_ietf_ipsec_nat_t_ike_03[VID_LEN] = {0x7D, 0x94, 0x19, 0xA6, 0x53, 0x10, 0xCA, 0x6F, 0x2C, 0x17, 0x9D, 0x92, 0x15, 0x52, 0x9d, 0x56}; /* according to http://www.ietf.org/internet-drafts/draft-ietf-ipsec-nat-t-ike-03.txt */
295 static dissector_handle_t esp_handle;
296 static dissector_handle_t ah_handle;
299 dissect_payloads(tvbuff_t *tvb, proto_tree *tree, guint8 initial_payload,
300 int offset, int length)
302 guint8 payload, next_payload;
303 guint16 payload_length;
306 for (payload = initial_payload; length != 0; payload = next_payload) {
307 if (payload == LOAD_TYPE_NONE) {
309 * What? There's more stuff in this chunk of data, but the
310 * previous payload had a "next payload" type of None?
312 proto_tree_add_text(tree, tvb, offset, length,
314 tvb_bytes_to_str(tvb, offset, length));
317 ntree = dissect_payload_header(tvb, offset, length, payload,
318 &next_payload, &payload_length, tree);
321 if (payload_length >= 4) { /* XXX = > 4? */
322 if (payload < NUM_LOAD_TYPES) {
323 (*strfuncs[payload].func)(tvb, offset + 4, payload_length - 4, ntree,
327 proto_tree_add_text(ntree, tvb, offset + 4, payload_length - 4,
332 proto_tree_add_text(ntree, tvb, offset + 4, 0,
333 "Payload (bogus, length is %u, must be at least 4)",
337 offset += payload_length;
338 length -= payload_length;
343 dissect_isakmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
346 struct isakmp_hdr hdr;
348 proto_tree * isakmp_tree = NULL;
349 struct udp_encap_hdr encap_hdr;
351 static const guint8 non_esp_marker[4] = { 0, 0, 0, 0 };
354 if (check_col(pinfo->cinfo, COL_PROTOCOL))
355 col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISAKMP");
356 if (check_col(pinfo->cinfo, COL_INFO))
357 col_clear(pinfo->cinfo, COL_INFO);
359 hdr.length = tvb_get_ntohl(tvb, offset + sizeof(hdr) - sizeof(hdr.length));
362 ti = proto_tree_add_item(tree, proto_isakmp, tvb, offset, hdr.length, FALSE);
363 isakmp_tree = proto_item_add_subtree(ti, ett_isakmp);
366 tvb_memcpy(tvb, (guint8 *)&encap_hdr, 0, sizeof(encap_hdr));
368 if (encap_hdr.non_esp_marker[0] == 0xFF) {
369 if (check_col(pinfo->cinfo, COL_INFO))
370 col_add_str(pinfo->cinfo, COL_INFO, "UDP encapsulated IPSec - NAT Keepalive");
373 if (memcmp(encap_hdr.non_esp_marker,non_esp_marker,4) == 0) {
374 if (check_col(pinfo->cinfo, COL_INFO))
375 col_add_str(pinfo->cinfo, COL_INFO, "UDP encapsulated IPSec - ESP");
377 proto_tree_add_text(isakmp_tree, tvb, offset,
378 sizeof(encap_hdr.non_esp_marker),
380 offset += sizeof(encap_hdr.non_esp_marker);
381 next_tvb = tvb_new_subset(tvb, offset, -1, -1);
382 call_dissector(esp_handle, next_tvb, pinfo, tree);
385 hdr.exch_type = tvb_get_guint8(tvb, sizeof(hdr.icookie) + sizeof(hdr.rcookie) + sizeof(hdr.next_payload) + sizeof(hdr.version));
386 if (check_col(pinfo->cinfo, COL_INFO))
387 col_add_str(pinfo->cinfo, COL_INFO, exchtype2str(hdr.exch_type));
390 tvb_memcpy(tvb, (guint8 *)&hdr.icookie, offset, sizeof(hdr.icookie));
391 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.icookie),
392 "Initiator cookie: 0x%s", tvb_bytes_to_str(tvb, offset, sizeof(hdr.icookie)));
393 offset += sizeof(hdr.icookie);
395 tvb_memcpy(tvb, (guint8 *)&hdr.rcookie, offset, sizeof(hdr.rcookie));
396 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.rcookie),
397 "Responder cookie: 0x%s", tvb_bytes_to_str(tvb, offset, sizeof(hdr.rcookie)));
398 offset += sizeof(hdr.rcookie);
400 hdr.next_payload = tvb_get_guint8(tvb, offset);
401 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.next_payload),
402 "Next payload: %s (%u)",
403 payloadtype2str(hdr.next_payload), hdr.next_payload);
404 offset += sizeof(hdr.next_payload);
406 hdr.version = tvb_get_guint8(tvb, offset);
407 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.version),
409 hi_nibble(hdr.version), lo_nibble(hdr.version));
410 offset += sizeof(hdr.version);
412 hdr.exch_type = tvb_get_guint8(tvb, offset);
413 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.exch_type),
414 "Exchange type: %s (%u)",
415 exchtype2str(hdr.exch_type), hdr.exch_type);
416 offset += sizeof(hdr.exch_type);
422 hdr.flags = tvb_get_guint8(tvb, offset);
423 fti = proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.flags), "Flags");
424 ftree = proto_item_add_subtree(fti, ett_isakmp_flags);
426 proto_tree_add_text(ftree, tvb, offset, 1, "%s",
427 decode_boolean_bitfield(hdr.flags, E_FLAG, sizeof(hdr.flags)*8,
428 "Encryption", "No encryption"));
429 proto_tree_add_text(ftree, tvb, offset, 1, "%s",
430 decode_boolean_bitfield(hdr.flags, C_FLAG, sizeof(hdr.flags)*8,
431 "Commit", "No commit"));
432 proto_tree_add_text(ftree, tvb, offset, 1, "%s",
433 decode_boolean_bitfield(hdr.flags, A_FLAG, sizeof(hdr.flags)*8,
434 "Authentication", "No authentication"));
435 offset += sizeof(hdr.flags);
438 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.message_id),
439 "Message ID: 0x%s", tvb_bytes_to_str(tvb, offset, sizeof(hdr.message_id)));
440 offset += sizeof(hdr.message_id);
442 proto_tree_add_text(isakmp_tree, tvb, offset, sizeof(hdr.length),
443 "Length: %u", hdr.length);
444 offset += sizeof(hdr.length);
446 len = hdr.length - sizeof(hdr);
448 if (hdr.flags & E_FLAG) {
449 if (len && isakmp_tree) {
450 proto_tree_add_text(isakmp_tree, tvb, offset, len,
451 "Encrypted payload (%d byte%s)",
452 len, plurality(len, "", "s"));
455 dissect_payloads(tvb, isakmp_tree, hdr.next_payload, offset, len);
460 dissect_payload_header(tvbuff_t *tvb, int offset, int length, guint8 payload,
461 guint8 *next_payload_p, guint16 *payload_length_p, proto_tree *tree)
464 guint16 payload_length;
469 proto_tree_add_text(tree, tvb, offset, length,
470 "Not enough room in payload for all transforms");
473 next_payload = tvb_get_guint8(tvb, offset);
474 payload_length = tvb_get_ntohs(tvb, offset + 2);
476 ti = proto_tree_add_text(tree, tvb, offset, payload_length,
477 "%s payload", loadtype2str(payload));
478 ntree = proto_item_add_subtree(ti, ett_isakmp_payload);
480 proto_tree_add_text(ntree, tvb, offset, 1,
481 "Next payload: %s (%u)",
482 payloadtype2str(next_payload), next_payload);
483 proto_tree_add_text(ntree, tvb, offset+2, 2, "Length: %u", payload_length);
485 *next_payload_p = next_payload;
486 *payload_length_p = payload_length;
491 dissect_sa(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
498 proto_tree_add_text(tree, tvb, offset, length,
499 "DOI %s (length is %u, should be >= 4)",
500 tvb_bytes_to_str(tvb, offset, length), length);
503 doi = tvb_get_ntohl(tvb, offset);
504 proto_tree_add_text(tree, tvb, offset, 4,
505 "Domain of interpretation: %s (%u)",
506 doitype2str(doi), doi);
513 proto_tree_add_text(tree, tvb, offset, length,
514 "Situation: %s (length is %u, should be >= 4)",
515 tvb_bytes_to_str(tvb, offset, length), length);
518 situation = tvb_get_ntohl(tvb, offset);
519 proto_tree_add_text(tree, tvb, offset, 4,
520 "Situation: %s (%u)",
521 situation2str(situation), situation);
525 dissect_payloads(tvb, tree, LOAD_TYPE_PROPOSAL, offset, length);
528 proto_tree_add_text(tree, tvb, offset, length,
530 tvb_bytes_to_str(tvb, offset, length));
535 dissect_proposal(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
540 guint8 num_transforms;
542 guint16 payload_length;
546 proposal_num = tvb_get_guint8(tvb, offset);
548 proto_item_append_text(tree, " # %d",proposal_num);
549 proto_tree_add_text(tree, tvb, offset, 1,
550 "Proposal number: %u", proposal_num);
554 protocol_id = tvb_get_guint8(tvb, offset);
555 proto_tree_add_text(tree, tvb, offset, 1,
556 "Protocol ID: %s (%u)",
557 proto2str(protocol_id), protocol_id);
561 spi_size = tvb_get_guint8(tvb, offset);
562 proto_tree_add_text(tree, tvb, offset, 1,
563 "SPI size: %u", spi_size);
567 num_transforms = tvb_get_guint8(tvb, offset);
568 proto_tree_add_text(tree, tvb, offset, 1,
569 "Number of transforms: %u", num_transforms);
574 proto_tree_add_text(tree, tvb, offset, spi_size, "SPI: %s",
575 tvb_bytes_to_str(tvb, offset, spi_size));
580 while (num_transforms > 0) {
581 ntree = dissect_payload_header(tvb, offset, length, LOAD_TYPE_TRANSFORM,
582 &next_payload, &payload_length, tree);
585 if (length < payload_length) {
586 proto_tree_add_text(tree, tvb, offset + 4, length,
587 "Not enough room in payload for all transforms");
590 if (payload_length >= 4)
591 dissect_transform(tvb, offset + 4, payload_length - 4, ntree, protocol_id);
593 proto_tree_add_text(ntree, tvb, offset + 4, payload_length - 4, "Payload");
594 offset += payload_length;
595 length -= payload_length;
601 dissect_transform(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
605 guint8 transform_num;
607 transform_num = tvb_get_guint8(tvb, offset);
608 proto_item_append_text(tree," # %d",transform_num);
609 proto_tree_add_text(tree, tvb, offset, 1,
610 "Transform number: %u", transform_num);
614 transform_id = tvb_get_guint8(tvb, offset);
615 switch (protocol_id) {
617 proto_tree_add_text(tree, tvb, offset, 1,
618 "Transform ID: %u", transform_id);
621 proto_tree_add_text(tree, tvb, offset, 1,
622 "Transform ID: %s (%u)",
623 trans2str(transform_id), transform_id);
626 proto_tree_add_text(tree, tvb, offset, 1,
627 "Transform ID: %s (%u)",
628 ah_trans2str(transform_id), transform_id);
631 proto_tree_add_text(tree, tvb, offset, 1,
632 "Transform ID: %s (%u)",
633 esp_trans2str(transform_id), transform_id);
636 proto_tree_add_text(tree, tvb, offset, 1,
637 "Transform ID: %s (%u)",
638 ipcomp_trans2str(transform_id), transform_id);
647 guint16 aft = tvb_get_ntohs(tvb, offset);
648 guint16 type = aft & 0x7fff;
653 if (protocol_id == 1 && transform_id == 1) {
655 str = p1_atttype2str(type);
658 str = atttype2str(type);
662 val = tvb_get_ntohs(tvb, offset + 2);
663 proto_tree_add_text(tree, tvb, offset, 4,
666 value2str(ike_phase1, type, val), val);
671 len = tvb_get_ntohs(tvb, offset + 2);
673 if (!get_num(tvb, offset + 4, len, &val)) {
674 proto_tree_add_text(tree, tvb, offset, pack_len,
675 "%s (%u): <too big (%u bytes)>",
678 proto_tree_add_text(tree, tvb, offset, pack_len,
681 value2str(ike_phase1, type, val), val);
690 dissect_key_exch(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
693 proto_tree_add_text(tree, tvb, offset, length, "Key Exchange Data");
697 dissect_id(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
704 id_type = tvb_get_guint8(tvb, offset);
705 proto_tree_add_text(tree, tvb, offset, 1,
706 "ID type: %s (%u)", id2str(id_type), id_type);
710 protocol_id = tvb_get_guint8(tvb, offset);
711 if (protocol_id == 0) {
712 proto_tree_add_text(tree, tvb, offset, 1,
713 "Protocol ID: Unused");
715 proto_tree_add_text(tree, tvb, offset, 1,
716 "Protocol ID: %s (%u)",
717 ipprotostr(protocol_id), protocol_id);
722 port = tvb_get_ntohs(tvb, offset);
724 proto_tree_add_text(tree, tvb, offset, 2, "Port: Unused");
726 proto_tree_add_text(tree, tvb, offset, 2, "Port: %u", port);
732 proto_tree_add_text(tree, tvb, offset, length,
733 "Identification data: %s",
734 ip_to_str(tvb_get_ptr(tvb, offset, 4)));
738 proto_tree_add_text(tree, tvb, offset, length,
739 "Identification data: %.*s", length,
740 tvb_get_ptr(tvb, offset, length));
743 proto_tree_add_text(tree, tvb, offset, length,
744 "Identification data: %s/%s",
745 ip_to_str(tvb_get_ptr(tvb, offset, 4)),
746 ip_to_str(tvb_get_ptr(tvb, offset+4, 4)));
749 proto_tree_add_text(tree, tvb, offset, length, "Identification Data");
755 dissect_cert(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
760 cert_enc = tvb_get_guint8(tvb, offset);
761 proto_tree_add_text(tree, tvb, offset, 1,
762 "Certificate encoding: %u - %s",
763 cert_enc, certtype2str(cert_enc));
767 proto_tree_add_text(tree, tvb, offset, length, "Certificate Data");
771 dissect_certreq(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
776 cert_type = tvb_get_guint8(tvb, offset);
777 proto_tree_add_text(tree, tvb, offset, 1,
778 "Certificate type: %u - %s",
779 cert_type, certtype2str(cert_type));
783 proto_tree_add_text(tree, tvb, offset, length, "Certificate Authority");
787 dissect_hash(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
790 proto_tree_add_text(tree, tvb, offset, length, "Hash Data");
794 dissect_sig(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
797 proto_tree_add_text(tree, tvb, offset, length, "Signature Data");
801 dissect_nonce(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
804 proto_tree_add_text(tree, tvb, offset, length, "Nonce Data");
808 dissect_notif(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
816 doi = tvb_get_ntohl(tvb, offset);
817 proto_tree_add_text(tree, tvb, offset, 4,
818 "Domain of Interpretation: %s (%u)",
819 doitype2str(doi), doi);
823 protocol_id = tvb_get_guint8(tvb, offset);
824 proto_tree_add_text(tree, tvb, offset, 1,
825 "Protocol ID: %s (%u)",
826 proto2str(protocol_id), protocol_id);
830 spi_size = tvb_get_guint8(tvb, offset);
831 proto_tree_add_text(tree, tvb, offset, 1,
832 "SPI size: %u", spi_size);
836 msgtype = tvb_get_ntohs(tvb, offset);
837 proto_tree_add_text(tree, tvb, offset, 2,
838 "Message type: %s (%u)", msgtype2str(msgtype), msgtype);
843 proto_tree_add_text(tree, tvb, offset, spi_size, "Security Parameter Index");
849 proto_tree_add_text(tree, tvb, offset, length, "Notification Data");
853 dissect_delete(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
862 doi = tvb_get_ntohl(tvb, offset);
863 proto_tree_add_text(tree, tvb, offset, 4,
864 "Domain of Interpretation: %s (%u)",
865 doitype2str(doi), doi);
869 protocol_id = tvb_get_guint8(tvb, offset);
870 proto_tree_add_text(tree, tvb, offset, 1,
871 "Protocol ID: %s (%u)",
872 proto2str(protocol_id), protocol_id);
876 spi_size = tvb_get_guint8(tvb, offset);
877 proto_tree_add_text(tree, tvb, offset, 1,
878 "SPI size: %u", spi_size);
882 num_spis = tvb_get_ntohs(tvb, offset);
883 proto_tree_add_text(tree, tvb, offset, 2,
884 "Number of SPIs: %u", num_spis);
888 for (i = 0; i < num_spis; ++i) {
889 if (length < spi_size) {
890 proto_tree_add_text(tree, tvb, offset, length,
891 "Not enough room in payload for all SPI's");
894 proto_tree_add_text(tree, tvb, offset, spi_size,
902 dissect_vid(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
905 guint32 CPproduct, CPversion;
909 pVID = tvb_get_ptr(tvb, offset, length);
910 pt = proto_tree_add_text(tree, tvb, offset, length, "Vendor ID: ");
911 if (memcmp(pVID, VID_MS_W2K_WXP, isakmp_min(VID_MS_LEN, length)) == 0)
912 proto_item_append_text(pt, "Microsoft Win2K/WinXP");
914 if (memcmp(pVID, VID_CP, isakmp_min(VID_CP_LEN, length)) == 0)
916 proto_item_append_text(pt, "Check Point");
917 offset += VID_CP_LEN;
918 CPproduct = tvb_get_ntohl(tvb, offset);
919 ntree = proto_item_add_subtree(pt, ett_isakmp_payload);
920 pt = proto_tree_add_text(ntree, tvb, offset, sizeof(CPproduct), "Check Point Product: ");
922 case 1: proto_item_append_text(pt, "VPN-1");
924 case 2: proto_item_append_text(pt, "SecuRemote/SecureClient");
926 default: proto_item_append_text(pt, "Unknown CP product!");
929 offset += sizeof(CPproduct);
930 CPversion = tvb_get_ntohl(tvb, offset);
931 pt = proto_tree_add_text(ntree, tvb, offset, length, "Version: ");
933 case 2: proto_item_append_text(pt, "4.1");
935 case 3: proto_item_append_text(pt, "4.1 SP-1");
937 case 4002: proto_item_append_text(pt, "4.1 (SP-2 or above)");
939 case 5000: proto_item_append_text(pt, "NG");
941 case 5001: proto_item_append_text(pt, "NG Feature Pack 1");
943 case 5002: proto_item_append_text(pt, "NG Feature Pack 2");
945 case 5003: proto_item_append_text(pt, "NG Feature Pack 3");
947 default: proto_item_append_text(pt, " Uknown CP version!");
952 if (memcmp(pVID, VID_CYBERGUARD, isakmp_min(VID_LEN, length)) == 0)
953 proto_item_append_text(pt, "Cyber Guard");
955 if (memcmp(pVID, VID_SAFENET, isakmp_min(VID_LEN, length)) == 0)
956 proto_item_append_text(pt, "SafeNet");
958 if (memcmp(pVID, VID_draft_ietf_ipsec_nat_t_ike_03, isakmp_min(VID_LEN, length)) == 0)
959 proto_item_append_text(pt, "draft-ietf-ipsec-nat-t-ike-03");
961 proto_item_append_text(pt, "unknown vendor ID: 0x%s",tvb_bytes_to_str(tvb, offset, length));
965 dissect_config(tvbuff_t *tvb, int offset, int length, proto_tree *tree,
970 type = tvb_get_guint8(tvb, offset);
971 proto_tree_add_text(tree, tvb, offset, 1,
972 "Type %s (%u)",attrtype2str(type),type);
977 proto_tree_add_text(tree, tvb, offset, 2,
978 "Identifier: %u", tvb_get_ntohs(tvb, offset));
983 guint16 aft = tvb_get_ntohs(tvb, offset);
984 guint16 type = aft & 0x7fff;
990 val = tvb_get_ntohs(tvb, offset + 2);
991 proto_tree_add_text(tree, tvb, offset, 4,
992 "%s (%u)", cfgattrident2str(type), val);
997 len = tvb_get_ntohs(tvb, offset + 2);
999 if (!get_num(tvb, offset + 4, len, &val)) {
1000 proto_tree_add_text(tree, tvb, offset, pack_len,
1001 "%s: <too big (%u bytes)>",
1002 cfgattrident2str(type), len);
1004 proto_tree_add_text(tree, tvb, offset, 4,
1005 "%s (%ue)", cfgattrident2str(type),
1015 payloadtype2str(guint8 type) {
1017 if (type < NUM_LOAD_TYPES) return strfuncs[type].str;
1018 if (type < 128) return "RESERVED";
1019 if (type < 256) return "Private USE";
1021 return "Huh? You should never see this! Shame on you!";
1025 exchtype2str(guint8 type) {
1027 #define NUM_EXCHSTRS 7
1028 static const char * exchstrs[NUM_EXCHSTRS] = {
1031 "Identity Protection (Main Mode)",
1032 "Authentication Only",
1035 "Transaction (Config Mode)"
1038 if (type < NUM_EXCHSTRS) return exchstrs[type];
1039 if (type < 32) return "ISAKMP Future Use";
1042 return "Quick Mode";
1044 return "New Group Mode";
1046 if (type < 240) return "DOI Specific Use";
1047 if (type < 256) return "Private Use";
1049 return "Huh? You should never see this! Shame on you!";
1053 doitype2str(guint32 type) {
1054 if (type == 1) return "IPSEC";
1055 return "Unknown DOI Type";
1059 msgtype2str(guint16 type) {
1061 #define NUM_PREDEFINED 31
1062 static const char *msgs[NUM_PREDEFINED] = {
1064 "INVALID-PAYLOAD-TYPE",
1065 "DOI-NOT-SUPPORTED",
1066 "SITUATION-NOT-SUPPORTED",
1068 "INVALID-MAJOR-VERSION",
1069 "INVALID-MINOR-VERSION",
1070 "INVALID-EXCHANGE-TYPE",
1072 "INVALID-MESSAGE-ID",
1073 "INVALID-PROTOCOL-ID",
1075 "INVALID-TRANSFORM-ID",
1076 "ATTRIBUTES-NOT-SUPPORTED",
1077 "NO-PROPOSAL-CHOSEN",
1078 "BAD-PROPOSAL-SYNTAX",
1079 "PAYLOAD-MALFORMED",
1080 "INVALID-KEY-INFORMATION",
1081 "INVALID-ID-INFORMATION",
1082 "INVALID-CERT-ENCODING",
1083 "INVALID-CERTIFICATE",
1084 "CERT-TYPE-UNSUPPORTED",
1085 "INVALID-CERT-AUTHORITY",
1086 "INVALID-HASH-INFORMATION",
1087 "AUTHENTICATION-FAILED",
1088 "INVALID-SIGNATURE",
1089 "ADDRESS-NOTIFICATION",
1090 "NOTIFY-SA-LIFETIME",
1091 "CERTIFICATE-UNAVAILABLE",
1092 "UNSUPPORTED-EXCHANGE-TYPE",
1093 "UNEQUAL-PAYLOAD-LENGTHS"
1096 if (type < NUM_PREDEFINED) return msgs[type];
1097 if (type < 8192) return "RESERVED (Future Use)";
1098 if (type < 16384) return "Private Use";
1099 if (type < 16385) return "CONNECTED";
1100 if (type < 24576) return "RESERVED (Future Use) - status";
1101 if (type < 24577) return "RESPONDER-LIFETIME";
1102 if (type < 24578) return "REPLAY-STATUS";
1103 if (type < 24579) return "INITIAL-CONTACT";
1104 if (type < 32768) return "DOI-specific codes";
1105 if (type < 40960) return "Private Use - status";
1106 if (type < 65535) return "RESERVED (Future Use) - status (2)";
1108 return "Huh? You should never see this! Shame on you!";
1112 situation2str(guint32 type) {
1114 #define SIT_MSG_NUM 1024
1115 #define SIT_IDENTITY 0x01
1116 #define SIT_SECRECY 0x02
1117 #define SIT_INTEGRITY 0x04
1119 static char msg[SIT_MSG_NUM];
1124 if (type & SIT_IDENTITY) {
1125 ret = snprintf(msg, SIT_MSG_NUM-n, "%sIDENTITY", sep);
1127 /* Some versions of snprintf return -1 if they'd truncate the output. */
1133 if (type & SIT_SECRECY) {
1134 if (n >= SIT_MSG_NUM) {
1138 ret = snprintf(msg, SIT_MSG_NUM-n, "%sSECRECY", sep);
1140 /* Some versions of snprintf return -1 if they'd truncate the output. */
1146 if (type & SIT_INTEGRITY) {
1147 if (n >= SIT_MSG_NUM) {
1151 ret = snprintf(msg, SIT_MSG_NUM-n, "%sINTEGRITY", sep);
1153 /* Some versions of snprintf return -1 if they'd truncate the output. */
1164 value2str(int ike_p1, guint16 att_type, guint16 value) {
1166 if (value == 0) return "RESERVED";
1172 case 0: return "RESERVED";
1173 case 1: return "Seconds";
1174 case 2: return "Kilobytes";
1175 default: return "UNKNOWN-SA-VALUE";
1178 return "Duration-Value";
1180 return "Group-Value";
1183 case 0: return "RESERVED";
1184 case 1: return "Tunnel";
1185 case 2: return "Transport";
1186 case 61440: return "Check Point IPSec UDP Encapsulation";
1187 case 61443: return "UDP-Encapsulated-Tunnel (draft)";
1188 case 61444: return "UDP-Encapsulated-Transport (draft)";
1189 default: return "UNKNOWN-ENCAPSULATION-VALUE";
1193 case 0: return "RESERVED";
1194 case 1: return "HMAC-MD5";
1195 case 2: return "HMAC-SHA";
1196 case 3: return "DES-MAC";
1197 case 4: return "KPDK";
1198 case 5: return "HMAC-SHA2-256";
1199 case 6: return "HMAC-SHA2-384";
1200 case 7: return "HMAC-SHA2-512";
1201 default: return "UNKNOWN-AUTHENTICATION-VALUE";
1204 return "Key-Length";
1206 return "Key-Rounds";
1208 return "Compress-Dictionary-size";
1210 return "Compress Private Algorithm";
1211 default: return "UNKNOWN-ATTRIBUTE-TYPE";
1218 case 1: return "DES-CBC";
1219 case 2: return "IDEA-CBC";
1220 case 3: return "BLOWFISH-CBC";
1221 case 4: return "RC5-R16-B64-CBC";
1222 case 5: return "3DES-CBC";
1223 case 6: return "CAST-CBC";
1224 case 7: return "AES-CBC";
1225 default: return "UNKNOWN-ENCRYPTION-ALG";
1229 case 1: return "MD5";
1230 case 2: return "SHA";
1231 case 3: return "TIGER";
1232 case 4: return "SHA2-256";
1233 case 5: return "SHA2-384";
1234 case 6: return "SHA2-512";
1235 default: return "UNKNOWN-HASH-ALG";
1239 case 1: return "PSK";
1240 case 2: return "DSS-SIG";
1241 case 3: return "RSA-SIG";
1242 case 4: return "RSA-ENC";
1243 case 5: return "RSA-Revised-ENC";
1244 case 6: return "Encryption with El-Gamal";
1245 case 7: return "Revised encryption with El-Gamal";
1246 case 8: return "ECDSA signatures";
1247 case 64221: return "HybridInitRSA";
1248 case 64222: return "HybridRespRSA";
1249 case 64223: return "HybridInitDSS";
1250 case 64224: return "HybridRespDSS";
1251 case 65001: return "XAUTHInitPreShared";
1252 case 65002: return "XAUTHRespPreShared";
1253 case 65003: return "XAUTHInitDSS";
1254 case 65004: return "XAUTHRespDSS";
1255 case 65005: return "XAUTHInitRSA";
1256 case 65006: return "XAUTHRespRSA";
1257 case 65007: return "XAUTHInitRSAEncryption";
1258 case 65008: return "XAUTHRespRSAEncryption";
1259 case 65009: return "XAUTHInitRSARevisedEncryption";
1260 case 65010: return "XAUTHRespRSARevisedEncryption";
1261 default: return "UNKNOWN-AUTH-METHOD";
1263 case 4: return grpdesc2str(value);
1270 return "Group-Value";
1273 case 1: return "MODP";
1274 case 2: return "ECP";
1275 case 3: return "EC2N";
1276 default: return "UNKNOWN-GROUPT-TYPE";
1280 case 1: return "Seconds";
1281 case 2: return "Kilobytes";
1282 default: return "UNKNOWN-SA-VALUE";
1285 return "Duration-Value";
1289 return "Key-Length";
1291 return "Field-Size";
1292 default: return "UNKNOWN-ATTRIBUTE-TYPE";
1298 attrtype2str(guint8 type) {
1300 case 0: return "Reserved";
1301 case 1: return "ISAKMP_CFG_REQUEST";
1302 case 2: return "ISAKMP_CFG_REPLY";
1303 case 3: return "ISAKMP_CFG_SET";
1304 case 4: return "ISAKMP_CFG_ACK";
1307 return "Future use";
1308 return "Private use";
1312 cfgattrident2str(guint16 ident) {
1313 #define NUM_ATTR_DEFINED 12
1314 static const char *msgs[NUM_PREDEFINED] = {
1316 "INTERNAL_IP4_ADDRESS",
1317 "INTERNAL_IP4_NETMASK",
1319 "INTERNAL_IP4_NBNS",
1320 "INTERNAL_ADDRESS_EXPIREY",
1321 "INTERNAL_IP4_DHCP",
1322 "APPLICATION_VERSION"
1323 "INTERNAL_IP6_ADDRESS",
1324 "INTERNAL_IP6_NETMASK",
1326 "INTERNAL_IP6_NBNS",
1327 "INTERNAL_IP6_DHCP",
1329 if(ident < NUM_ATTR_DEFINED)
1332 return "Future use";
1334 case 16520: return "XAUTH_TYPE";
1335 case 16521: return "XAUTH_USER_NAME";
1336 case 16522: return "XAUTH_USER_PASSWORD";
1337 case 16523: return "XAUTH_PASSCODE";
1338 case 16524: return "XAUTH_MESSAGE";
1339 case 16525: return "XAUTH_CHALLANGE";
1340 case 16526: return "XAUTH_DOMAIN";
1341 case 16527: return "XAUTH_STATUS";
1342 case 16528: return "XAUTH_NEXT_PIN";
1343 case 16529: return "XAUTH_ANSWER";
1344 default: return "Private use";
1349 certtype2str(guint8 type) {
1350 #define NUM_CERTTYPE 11
1351 static const char *msgs[NUM_CERTTYPE] = {
1353 "PKCS #7 wrapped X.509 certificate",
1356 "X.509 Certificate - Signature",
1357 "X.509 Certificate - Key Exchange",
1359 "Certificate Revocation List (CRL)",
1360 "Authority Revocation List (ARL)",
1362 "X.509 Certificate - Attribute",
1364 if(type > NUM_CERTTYPE)
1370 get_num(tvbuff_t *tvb, int offset, guint16 len, guint32 *num_p) {
1374 *num_p = tvb_get_guint8(tvb, offset);
1377 *num_p = tvb_get_ntohs(tvb, offset);
1380 *num_p = tvb_get_ntoh24(tvb, offset);
1383 *num_p = tvb_get_ntohl(tvb, offset);
1393 proto_register_isakmp(void)
1395 /* static hf_register_info hf[] = {
1397 { "Name", "isakmp.abbreviation", TYPE, VALS_POINTER }},
1399 static gint *ett[] = {
1402 &ett_isakmp_payload,
1405 proto_isakmp = proto_register_protocol("Internet Security Association and Key Management Protocol",
1406 "ISAKMP", "isakmp");
1407 /* proto_register_field_array(proto_isakmp, hf, array_length(hf));*/
1408 proto_register_subtree_array(ett, array_length(ett));
1412 proto_reg_handoff_isakmp(void)
1414 dissector_handle_t isakmp_handle;
1417 * Get handle for the AH & ESP dissectors.
1419 esp_handle = find_dissector("esp");
1420 ah_handle = find_dissector("ah");
1422 isakmp_handle = create_dissector_handle(dissect_isakmp, proto_isakmp);
1423 dissector_add("udp.port", UDP_PORT_ISAKMP, isakmp_handle);
1424 dissector_add("tcp.port", TCP_PORT_ISAKMP, isakmp_handle);