2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/interface.h>
23 #include <vnet/ipsec/ipsec.h>
24 #include <plugins/ikev2/ikev2.h>
25 #include <plugins/ikev2/ikev2_priv.h>
28 typedef CLIB_PACKED (struct {
36 }) ike_notify_payload_header_t;
40 typedef CLIB_PACKED (struct {
41 ip4_address_t start_addr;
42 ip4_address_t end_addr;
43 }) ikev2_ip4_addr_pair_t;
45 typedef CLIB_PACKED (struct {
46 ip6_address_t start_addr;
47 ip6_address_t end_addr;
48 }) ikev2_ip6_addr_pair_t;
50 typedef CLIB_PACKED (struct {
57 }) ikev2_ts_payload_entry_t;
61 typedef CLIB_PACKED (struct {
67 ikev2_ts_payload_entry_t ts[0];
68 }) ike_ts_payload_header_t;
72 typedef CLIB_PACKED (struct {
79 u8 num_transforms; u32 spi[0];
80 }) ike_sa_proposal_data_t;
84 typedef CLIB_PACKED (struct {
92 }) ike_sa_transform_data_t;
96 typedef CLIB_PACKED (struct {
104 }) ike_delete_payload_header_t;
107 static ike_payload_header_t *
108 ikev2_payload_add_hdr (ikev2_payload_chain_t * c, u8 payload_type, int len)
110 ike_payload_header_t *hdr =
111 (ike_payload_header_t *) & c->data[c->last_hdr_off];
115 hdr->nextpayload = payload_type;
117 c->first_payload_type = payload_type;
119 c->last_hdr_off = vec_len (c->data);
120 vec_add2 (c->data, tmp, len);
121 hdr = (ike_payload_header_t *) tmp;
122 clib_memset (hdr, 0, len);
124 hdr->length = clib_host_to_net_u16 (len);
130 ikev2_payload_add_data (ikev2_payload_chain_t * c, u8 * data)
133 ike_payload_header_t *hdr;
135 vec_append (c->data, data);
136 hdr = (ike_payload_header_t *) & c->data[c->last_hdr_off];
137 len = clib_net_to_host_u16 (hdr->length);
138 hdr->length = clib_host_to_net_u16 (len + vec_len (data));
142 ikev2_payload_add_notify (ikev2_payload_chain_t * c, u16 msg_type, u8 * data)
144 ikev2_payload_add_notify_2(c, msg_type, data, 0);
148 ikev2_payload_add_notify_2 (ikev2_payload_chain_t * c, u16 msg_type,
149 u8 * data, ikev2_notify_t * notify)
151 ike_notify_payload_header_t *n;
154 (ike_notify_payload_header_t *) ikev2_payload_add_hdr (c,
155 IKEV2_PAYLOAD_NOTIFY,
157 n->msg_type = clib_host_to_net_u16 (msg_type);
160 n->protocol_id = notify->protocol_id;
166 ikev2_payload_add_data (c, data);
170 ikev2_payload_add_sa (ikev2_payload_chain_t * c,
171 ikev2_sa_proposal_t * proposals)
173 ike_payload_header_t *ph;
174 ike_sa_proposal_data_t *prop;
175 ike_sa_transform_data_t *tr;
176 ikev2_sa_proposal_t *p;
177 ikev2_sa_transform_t *t;
183 ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_SA, sizeof (*ph));
185 vec_foreach (p, proposals)
187 int spi_size = (p->protocol_id == IKEV2_PROTOCOL_ESP) ? 4 : 0;
188 pr_data = vec_new (u8, sizeof (ike_sa_proposal_data_t) + spi_size);
189 prop = (ike_sa_proposal_data_t *) pr_data;
190 prop->last_or_more = proposals - p + 1 < vec_len (proposals) ? 2 : 0;
191 prop->protocol_id = p->protocol_id;
192 prop->proposal_num = p->proposal_num;
193 prop->spi_size = spi_size;
194 prop->num_transforms = vec_len (p->transforms);
197 prop->spi[0] = clib_host_to_net_u32 (p->spi);
199 vec_foreach (t, p->transforms)
201 vec_add2 (tr_data, tmp, sizeof (*tr) + vec_len (t->attrs));
202 tr = (ike_sa_transform_data_t *) tmp;
204 ((t - p->transforms) + 1 < vec_len (p->transforms)) ? 3 : 0;
205 tr->transform_type = t->type;
206 tr->transform_id = clib_host_to_net_u16 (t->transform_id);
208 clib_host_to_net_u16 (sizeof (*tr) + vec_len (t->attrs));
210 if (vec_len (t->attrs) > 0)
211 clib_memcpy_fast (tr->attributes, t->attrs, vec_len (t->attrs));
215 clib_host_to_net_u16 (vec_len (tr_data) + vec_len (pr_data));
216 ikev2_payload_add_data (c, pr_data);
217 ikev2_payload_add_data (c, tr_data);
224 ikev2_payload_add_ke (ikev2_payload_chain_t * c, u16 dh_group, u8 * dh_data)
226 ike_ke_payload_header_t *ke;
227 ke = (ike_ke_payload_header_t *) ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_KE,
230 ke->dh_group = clib_host_to_net_u16 (dh_group);
231 ikev2_payload_add_data (c, dh_data);
235 ikev2_payload_add_nonce (ikev2_payload_chain_t * c, u8 * nonce)
237 ikev2_payload_add_hdr (c, IKEV2_PAYLOAD_NONCE,
238 sizeof (ike_payload_header_t));
239 ikev2_payload_add_data (c, nonce);
243 ikev2_payload_add_id (ikev2_payload_chain_t * c, ikev2_id_t * id, u8 type)
245 ike_id_payload_header_t *idp;
247 (ike_id_payload_header_t *) ikev2_payload_add_hdr (c, type,
250 idp->id_type = id->type;
251 ikev2_payload_add_data (c, id->data);
255 ikev2_payload_add_delete (ikev2_payload_chain_t * c, ikev2_delete_t * d)
257 ike_delete_payload_header_t *dp;
258 u16 num_of_spi = vec_len (d);
261 (ike_delete_payload_header_t *) ikev2_payload_add_hdr (c,
262 IKEV2_PAYLOAD_DELETE,
265 if (d[0].protocol_id == IKEV2_PROTOCOL_IKE)
271 dp->protocol_id = d[0].protocol_id;
273 dp->num_of_spi = clib_host_to_net_u16 (num_of_spi);
276 u8 *data = vec_new (u8, 4);
277 u32 spi = clib_host_to_net_u32 (d2->spi);
278 clib_memcpy (data, &spi, 4);
279 ikev2_payload_add_data (c, data);
286 ikev2_payload_add_auth (ikev2_payload_chain_t * c, ikev2_auth_t * auth)
288 ike_auth_payload_header_t *ap;
290 (ike_auth_payload_header_t *) ikev2_payload_add_hdr (c,
294 ap->auth_method = auth->method;
295 ikev2_payload_add_data (c, auth->data);
299 ikev2_payload_add_ts_entry (u8 ** data, ikev2_ts_t * ts)
302 ikev2_ts_payload_entry_t *entry;
303 int len = sizeof (*entry);
305 if (ts->ts_type == TS_IPV4_ADDR_RANGE)
306 len += sizeof (ikev2_ip4_addr_pair_t);
308 len += sizeof (ikev2_ip6_addr_pair_t);
310 vec_add2 (data[0], tmp, len);
311 entry = (ikev2_ts_payload_entry_t *) tmp;
312 entry->ts_type = ts->ts_type;
313 entry->protocol_id = ts->protocol_id;
314 entry->selector_len = clib_host_to_net_u16 (len);
315 entry->start_port = clib_host_to_net_u16 (ts->start_port);
316 entry->end_port = clib_host_to_net_u16 (ts->end_port);
318 if (ts->ts_type == TS_IPV4_ADDR_RANGE)
320 ikev2_ip4_addr_pair_t *pair = (ikev2_ip4_addr_pair_t*) entry->addr_pair;
321 ip_address_copy_addr (&pair->start_addr, &ts->start_addr);
322 ip_address_copy_addr (&pair->end_addr, &ts->end_addr);
326 ikev2_ip6_addr_pair_t *pair = (ikev2_ip6_addr_pair_t*) entry->addr_pair;
327 ip_address_copy_addr (&pair->start_addr, &ts->start_addr);
328 ip_address_copy_addr (&pair->end_addr, &ts->end_addr);
333 ikev2_payload_add_ts (ikev2_payload_chain_t * c, ikev2_ts_t * ts, u8 type)
335 ike_ts_payload_header_t *tsh;
340 (ike_ts_payload_header_t *) ikev2_payload_add_hdr (c, type,
342 tsh->num_ts = vec_len (ts);
344 vec_foreach (ts2, ts)
346 ASSERT (ts2->ts_type == TS_IPV4_ADDR_RANGE ||
347 ts2->ts_type == TS_IPV6_ADDR_RANGE);
348 ikev2_payload_add_ts_entry (&data, ts2);
351 ikev2_payload_add_data (c, data);
356 ikev2_payload_chain_add_padding (ikev2_payload_chain_t * c, int bs)
358 u8 *tmp __attribute__ ((unused));
359 u8 pad_len = (vec_len (c->data) / bs + 1) * bs - vec_len (c->data);
360 vec_add2 (c->data, tmp, pad_len);
361 c->data[vec_len (c->data) - 1] = pad_len - 1;
364 ikev2_sa_proposal_t *
365 ikev2_parse_sa_payload (ike_payload_header_t * ikep, u32 rlen)
367 ikev2_sa_proposal_t *v = 0;
368 ikev2_sa_proposal_t *proposal;
369 ikev2_sa_transform_t *transform;
371 u32 plen = clib_net_to_host_u16 (ikep->length);
372 ike_sa_proposal_data_t *sap;
373 int proposal_ptr = 0;
375 if (sizeof (*ikep) > rlen)
378 rlen -= sizeof (*ikep);
381 if (proposal_ptr + sizeof (*sap) > rlen)
384 sap = (ike_sa_proposal_data_t *) & ikep->payload[proposal_ptr];
385 int i, transform_ptr;
387 /* IKE proposal should not have SPI */
388 if (sap->protocol_id == IKEV2_PROTOCOL_IKE && sap->spi_size != 0)
391 /* IKE proposal should not have SPI */
392 if (sap->protocol_id == IKEV2_PROTOCOL_ESP && sap->spi_size != 4)
395 transform_ptr = proposal_ptr + sizeof (*sap) + sap->spi_size;
396 if (transform_ptr > rlen)
399 vec_add2 (v, proposal, 1);
400 proposal->proposal_num = sap->proposal_num;
401 proposal->protocol_id = sap->protocol_id;
403 if (sap->spi_size == 4)
405 proposal->spi = clib_net_to_host_u32 (sap->spi[0]);
408 for (i = 0; i < sap->num_transforms; i++)
410 ike_sa_transform_data_t *tr =
411 (ike_sa_transform_data_t *) & ikep->payload[transform_ptr];
412 if (transform_ptr + sizeof (*tr) > rlen)
414 u16 tlen = clib_net_to_host_u16 (tr->transform_len);
416 if (tlen < sizeof (*tr))
419 vec_add2 (proposal->transforms, transform, 1);
421 transform->type = tr->transform_type;
422 transform->transform_id = clib_net_to_host_u16 (tr->transform_id);
423 if (transform_ptr + tlen > rlen)
425 if (tlen > sizeof (*tr))
426 vec_add (transform->attrs, tr->attributes, tlen - sizeof (*tr));
427 transform_ptr += tlen;
430 proposal_ptr += clib_net_to_host_u16 (sap->proposal_len);
432 while (proposal_ptr < (plen - sizeof (*ikep)) && sap->last_or_more == 2);
434 /* data validation */
435 if (proposal_ptr != (plen - sizeof (*ikep)) || sap->last_or_more)
441 ikev2_elog_detail ("SA payload data corrupted");
442 ikev2_sa_free_proposal_vector (&v);
447 ikev2_parse_ts_payload (ike_payload_header_t * ikep, u32 rlen)
449 ike_ts_payload_header_t *tsp = (ike_ts_payload_header_t *) ikep;
450 ikev2_ts_t *r = 0, *ts;
451 ikev2_ip4_addr_pair_t *pair4;
452 ikev2_ip6_addr_pair_t *pair6;
454 ikev2_ts_payload_entry_t *pe;
456 if (sizeof (*tsp) > rlen)
459 rlen -= sizeof (*tsp);
460 n_left = tsp->num_ts;
462 while (n_left && p + sizeof (*pe) < rlen)
464 pe = (ikev2_ts_payload_entry_t *) (((u8 *)tsp->ts) + p);
467 if (pe->ts_type != TS_IPV4_ADDR_RANGE &&
468 pe->ts_type != TS_IPV6_ADDR_RANGE)
470 ikev2_elog_uint (IKEV2_LOG_ERROR,
471 "unsupported TS type received (%u)", pe->ts_type);
476 ts->ts_type = pe->ts_type;
477 ts->protocol_id = pe->protocol_id;
478 ts->start_port = pe->start_port;
479 ts->end_port = pe->end_port;
481 if (pe->ts_type == TS_IPV4_ADDR_RANGE)
483 pair4 = (ikev2_ip4_addr_pair_t*) pe->addr_pair;
484 ip_address_set (&ts->start_addr, &pair4->start_addr, AF_IP4);
485 ip_address_set (&ts->end_addr, &pair4->end_addr, AF_IP4);
486 p += sizeof (*pair4);
490 pair6 = (ikev2_ip6_addr_pair_t*) pe->addr_pair;
491 ip_address_set (&ts->start_addr, &pair6->start_addr, AF_IP6);
492 ip_address_set (&ts->end_addr, &pair6->end_addr, AF_IP6);
493 p += sizeof (*pair6);
505 ikev2_parse_notify_payload (ike_payload_header_t * ikep, u32 rlen)
507 ike_notify_payload_header_t *n = (ike_notify_payload_header_t *) ikep;
508 u32 plen = clib_net_to_host_u16 (n->length);
509 ikev2_notify_t *r = 0;
512 if (sizeof (*n) > rlen)
515 r = vec_new (ikev2_notify_t, 1);
516 r->msg_type = clib_net_to_host_u16 (n->msg_type);
517 r->protocol_id = n->protocol_id;
519 if (n->spi_size == 4)
521 if (sizeof (spi) + sizeof (*n) > rlen)
524 clib_memcpy (&spi, n->payload, n->spi_size);
525 r->spi = clib_net_to_host_u32 (spi);
527 else if (n->spi_size == 0)
533 clib_warning ("invalid SPI Size %d", n->spi_size);
537 if (plen > (sizeof (*n) + n->spi_size))
539 if (plen <= sizeof (*n) + n->spi_size)
542 u32 data_len = plen - sizeof (*n) - n->spi_size;
543 vec_add (r->data, n->payload + n->spi_size, data_len);
553 ikev2_parse_vendor_payload (ike_payload_header_t * ikep)
555 u32 plen = clib_net_to_host_u16 (ikep->length);
556 ikev2_elog_uint (IKEV2_LOG_DEBUG, "vendor payload skipped, len %d", plen);
560 ikev2_parse_delete_payload (ike_payload_header_t * ikep, u32 rlen)
562 ike_delete_payload_header_t * d = (ike_delete_payload_header_t *) ikep;
563 ikev2_delete_t *r = 0, *del;
566 if (rlen < sizeof (*d))
569 num_of_spi = clib_net_to_host_u16 (d->num_of_spi);
570 if (d->protocol_id == IKEV2_PROTOCOL_IKE)
572 r = vec_new (ikev2_delete_t, 1);
577 if (sizeof (*d) + num_of_spi * sizeof (u32) > rlen)
580 for (i = 0; i < num_of_spi; i++)
582 vec_add2 (r, del, 1);
583 del->protocol_id = d->protocol_id;
584 del->spi = clib_net_to_host_u32 (d->spi[i]);
592 ikev2_find_ike_notify_payload (ike_header_t * ike, u32 msg_type)
595 ike_notify_payload_header_t *n;
596 ike_payload_header_t *ikep;
597 u32 payload = ike->nextpayload;
599 while (payload != IKEV2_PAYLOAD_NONE)
601 ikep = (ike_payload_header_t *) & ike->payload[p];
602 if (payload == IKEV2_PAYLOAD_NOTIFY)
604 n = (ike_notify_payload_header_t *)ikep;
605 if (n->msg_type == clib_net_to_host_u16 (msg_type))
608 u16 plen = clib_net_to_host_u16 (ikep->length);
609 payload = ikep->nextpayload;
616 * fd.io coding-style-patch-verification: ON
619 * eval: (c-set-style "gnu")