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.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vpp/app/version.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <plugins/ikev2/ikev2.h>
26 #include <plugins/ikev2/ikev2_priv.h>
27 #include <openssl/sha.h>
29 ikev2_main_t ikev2_main;
31 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
33 ikev2_child_sa_t * child);
35 #define ikev2_set_state(sa, v) do { \
37 clib_warning("sa state changed to " #v); \
47 format_ikev2_trace (u8 * s, va_list * args)
49 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
50 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
51 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
53 s = format (s, "ikev2: sw_if_index %d, next index %d",
54 t->sw_if_index, t->next_index);
58 static vlib_node_registration_t ikev2_node;
60 #define foreach_ikev2_error \
61 _(PROCESSED, "IKEv2 packets processed") \
62 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
63 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
64 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
65 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
66 _(NOT_IKEV2, "Non IKEv2 packets received")
70 #define _(sym,str) IKEV2_ERROR_##sym,
76 static char *ikev2_error_strings[] = {
77 #define _(sym,string) string,
84 IKEV2_NEXT_IP4_LOOKUP,
85 IKEV2_NEXT_ERROR_DROP,
89 static ikev2_sa_transform_t *
90 ikev2_find_transform_data (ikev2_sa_transform_t * t)
92 ikev2_main_t *km = &ikev2_main;
93 ikev2_sa_transform_t *td;
95 vec_foreach (td, km->supported_transforms)
97 if (td->type != t->type)
100 if (td->transform_id != t->transform_id)
103 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
105 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
106 || t->attrs[1] != 14)
109 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
117 static ikev2_sa_proposal_t *
118 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
119 ikev2_protocol_id_t prot_id)
121 ikev2_sa_proposal_t *rv = 0;
122 ikev2_sa_proposal_t *proposal;
123 ikev2_sa_transform_t *transform, *new_t;
124 u8 mandatory_bitmap, optional_bitmap;
126 if (prot_id == IKEV2_PROTOCOL_IKE)
128 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
129 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
130 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
131 optional_bitmap = mandatory_bitmap;
133 else if (prot_id == IKEV2_PROTOCOL_ESP)
135 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
136 (1 << IKEV2_TRANSFORM_TYPE_ESN);
137 optional_bitmap = mandatory_bitmap |
138 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
140 else if (prot_id == IKEV2_PROTOCOL_AH)
142 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
143 (1 << IKEV2_TRANSFORM_TYPE_ESN);
144 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
149 vec_add2 (rv, proposal, 1);
151 vec_foreach (proposal, proposals)
154 if (proposal->protocol_id != prot_id)
157 vec_foreach (transform, proposal->transforms)
159 if ((1 << transform->type) & bitmap)
162 if (ikev2_find_transform_data (transform))
164 bitmap |= 1 << transform->type;
165 vec_add2 (rv->transforms, new_t, 1);
166 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
167 new_t->attrs = vec_dup (transform->attrs);
171 clib_warning ("bitmap is %x mandatory is %x optional is %x",
172 bitmap, mandatory_bitmap, optional_bitmap);
174 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
175 (bitmap & ~optional_bitmap) == 0)
177 rv->proposal_num = proposal->proposal_num;
178 rv->protocol_id = proposal->protocol_id;
179 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
184 vec_free (rv->transforms);
193 ikev2_sa_transform_t *
194 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
195 ikev2_transform_type_t type)
197 ikev2_sa_transform_t *t;
202 vec_foreach (t, p->transforms)
205 return ikev2_find_transform_data (t);
211 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
215 vec_foreach (c, sa->childs)
217 ikev2_sa_proposal_t *proposal =
218 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
219 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
227 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
229 ikev2_sa_proposal_t *p;
230 ikev2_sa_transform_t *t;
237 vec_foreach (t, p->transforms)
241 vec_free (p->transforms);
247 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
250 vec_foreach (c, *childs)
252 ikev2_sa_free_proposal_vector (&c->r_proposals);
253 ikev2_sa_free_proposal_vector (&c->i_proposals);
264 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
266 ikev2_sa_free_proposal_vector (&child->r_proposals);
267 ikev2_sa_free_proposal_vector (&child->i_proposals);
268 vec_free (child->sk_ai);
269 vec_free (child->sk_ar);
270 vec_free (child->sk_ei);
271 vec_free (child->sk_er);
273 vec_del1 (sa->childs, child - sa->childs);
277 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
279 vec_free (sa->i_nonce);
280 vec_free (sa->i_dh_data);
281 vec_free (sa->dh_shared_key);
282 vec_free (sa->dh_private_key);
284 ikev2_sa_free_proposal_vector (&sa->r_proposals);
285 ikev2_sa_free_proposal_vector (&sa->i_proposals);
288 vec_free (sa->sk_ai);
289 vec_free (sa->sk_ar);
290 vec_free (sa->sk_ei);
291 vec_free (sa->sk_er);
292 vec_free (sa->sk_pi);
293 vec_free (sa->sk_pr);
295 vec_free (sa->i_id.data);
296 vec_free (sa->i_auth.data);
297 vec_free (sa->r_id.data);
298 vec_free (sa->r_auth.data);
300 EVP_PKEY_free (sa->r_auth.key);
304 ikev2_sa_free_all_child_sa (&sa->childs);
308 ikev2_delete_sa (ikev2_sa_t * sa)
310 ikev2_main_t *km = &ikev2_main;
311 u32 thread_index = vlib_get_thread_index ();
314 ikev2_sa_free_all_vec (sa);
316 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
319 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
320 pool_put (km->per_thread_data[thread_index].sas, sa);
325 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
327 ikev2_sa_transform_t *t = 0, *t2;
328 ikev2_main_t *km = &ikev2_main;
330 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
335 /* check if received DH group is on our list of supported groups */
336 vec_foreach (t2, km->supported_transforms)
338 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
347 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
348 vec_len (sa->i_dh_data));
349 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
353 if (sa->is_initiator)
356 RAND_bytes ((u8 *) & sa->ispi, 8);
359 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
360 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
365 RAND_bytes ((u8 *) & sa->rspi, 8);
368 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
369 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
372 /* generate dh keys */
373 ikev2_generate_dh (sa, t);
378 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
380 ikev2_sa_transform_t *t = 0, *t2;
381 ikev2_main_t *km = &ikev2_main;
384 /*move some data to the new SA */
385 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
386 sa->i_nonce = _(sai->i_nonce);
387 sa->i_dh_data = _(sai->i_dh_data);
388 sa->dh_private_key = _(sai->dh_private_key);
389 sa->iaddr.as_u32 = sai->iaddr.as_u32;
390 sa->raddr.as_u32 = sai->raddr.as_u32;
391 sa->is_initiator = sai->is_initiator;
392 sa->i_id.type = sai->i_id.type;
393 sa->profile_index = sai->profile_index;
394 sa->is_profile_index_set = sai->is_profile_index_set;
395 sa->i_id.data = _(sai->i_id.data);
396 sa->i_auth.method = sai->i_auth.method;
397 sa->i_auth.hex = sai->i_auth.hex;
398 sa->i_auth.data = _(sai->i_auth.data);
399 sa->i_auth.key = _(sai->i_auth.key);
400 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
401 sa->childs = _(sai->childs);
405 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
410 /* check if received DH group is on our list of supported groups */
411 vec_foreach (t2, km->supported_transforms)
413 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
422 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
423 vec_len (sa->i_dh_data));
424 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
429 /* generate dh keys */
430 ikev2_complete_dh (sa, t);
435 ikev2_calc_keys (ikev2_sa_t * sa)
438 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
441 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
443 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
445 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
447 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
449 vec_append (s, sa->i_nonce);
450 vec_append (s, sa->r_nonce);
451 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
453 /* Calculate S = Ni | Nr | SPIi | SPIr */
455 vec_add2 (s, tmp, 2 * sizeof (*spi));
457 spi[0] = clib_host_to_net_u64 (sa->ispi);
458 spi[1] = clib_host_to_net_u64 (sa->rspi);
460 /* calculate PRFplus */
462 int len = tr_prf->key_trunc + /* SK_d */
463 tr_integ->key_len * 2 + /* SK_ai, SK_ar */
464 tr_encr->key_len * 2 + /* SK_ei, SK_er */
465 tr_prf->key_len * 2; /* SK_pi, SK_pr */
467 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
474 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
475 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
476 pos += tr_prf->key_trunc;
479 sa->sk_ai = vec_new (u8, tr_integ->key_len);
480 clib_memcpy_fast (sa->sk_ai, keymat + pos, tr_integ->key_len);
481 pos += tr_integ->key_len;
484 sa->sk_ar = vec_new (u8, tr_integ->key_len);
485 clib_memcpy_fast (sa->sk_ar, keymat + pos, tr_integ->key_len);
486 pos += tr_integ->key_len;
489 sa->sk_ei = vec_new (u8, tr_encr->key_len);
490 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
491 pos += tr_encr->key_len;
494 sa->sk_er = vec_new (u8, tr_encr->key_len);
495 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
496 pos += tr_encr->key_len;
499 sa->sk_pi = vec_new (u8, tr_prf->key_len);
500 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
501 pos += tr_prf->key_len;
504 sa->sk_pr = vec_new (u8, tr_prf->key_len);
505 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
506 pos += tr_prf->key_len;
512 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
515 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
517 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
519 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
521 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
523 vec_append (s, sa->i_nonce);
524 vec_append (s, sa->r_nonce);
525 /* calculate PRFplus */
527 int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
529 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
534 child->sk_ei = vec_new (u8, ctr_encr->key_len);
535 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
536 pos += ctr_encr->key_len;
539 child->sk_ai = vec_new (u8, ctr_integ->key_len);
540 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
541 pos += ctr_integ->key_len;
544 child->sk_er = vec_new (u8, ctr_encr->key_len);
545 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
546 pos += ctr_encr->key_len;
549 child->sk_ar = vec_new (u8, ctr_integ->key_len);
550 clib_memcpy_fast (child->sk_ar, keymat + pos, ctr_integ->key_len);
551 pos += ctr_integ->key_len;
559 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
563 u32 len = clib_net_to_host_u32 (ike->length);
564 u8 payload = ike->nextpayload;
566 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
567 "exchange %x flags %x msgid %x length %u",
568 clib_net_to_host_u64 (ike->ispi),
569 clib_net_to_host_u64 (ike->rspi),
570 payload, ike->version,
571 ike->exchange, ike->flags,
572 clib_net_to_host_u32 (ike->msgid), len);
574 sa->ispi = clib_net_to_host_u64 (ike->ispi);
576 /* store whole IKE payload - needed for PSK auth */
577 vec_free (sa->last_sa_init_req_packet_data);
578 vec_add (sa->last_sa_init_req_packet_data, ike, len);
580 while (p < len && payload != IKEV2_PAYLOAD_NONE)
582 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
583 u32 plen = clib_net_to_host_u16 (ikep->length);
585 if (plen < sizeof (ike_payload_header_t))
588 if (payload == IKEV2_PAYLOAD_SA)
590 ikev2_sa_free_proposal_vector (&sa->i_proposals);
591 sa->i_proposals = ikev2_parse_sa_payload (ikep);
593 else if (payload == IKEV2_PAYLOAD_KE)
595 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
596 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
597 vec_free (sa->i_dh_data);
598 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
600 else if (payload == IKEV2_PAYLOAD_NONCE)
602 vec_free (sa->i_nonce);
603 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
605 else if (payload == IKEV2_PAYLOAD_NOTIFY)
607 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
610 else if (payload == IKEV2_PAYLOAD_VENDOR)
612 ikev2_parse_vendor_payload (ikep);
616 clib_warning ("unknown payload %u flags %x length %u", payload,
618 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
620 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
621 sa->unsupported_cp = payload;
626 payload = ikep->nextpayload;
630 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
634 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
638 u32 len = clib_net_to_host_u32 (ike->length);
639 u8 payload = ike->nextpayload;
641 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
642 "exchange %x flags %x msgid %x length %u",
643 clib_net_to_host_u64 (ike->ispi),
644 clib_net_to_host_u64 (ike->rspi),
645 payload, ike->version,
646 ike->exchange, ike->flags,
647 clib_net_to_host_u32 (ike->msgid), len);
649 sa->ispi = clib_net_to_host_u64 (ike->ispi);
650 sa->rspi = clib_net_to_host_u64 (ike->rspi);
652 /* store whole IKE payload - needed for PSK auth */
653 vec_free (sa->last_sa_init_res_packet_data);
654 vec_add (sa->last_sa_init_res_packet_data, ike, len);
656 while (p < len && payload != IKEV2_PAYLOAD_NONE)
658 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
659 u32 plen = clib_net_to_host_u16 (ikep->length);
661 if (plen < sizeof (ike_payload_header_t))
664 if (payload == IKEV2_PAYLOAD_SA)
666 ikev2_sa_free_proposal_vector (&sa->r_proposals);
667 sa->r_proposals = ikev2_parse_sa_payload (ikep);
670 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
672 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
675 else if (payload == IKEV2_PAYLOAD_KE)
677 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
678 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
679 vec_free (sa->r_dh_data);
680 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
682 else if (payload == IKEV2_PAYLOAD_NONCE)
684 vec_free (sa->r_nonce);
685 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
687 else if (payload == IKEV2_PAYLOAD_NOTIFY)
689 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
692 else if (payload == IKEV2_PAYLOAD_VENDOR)
694 ikev2_parse_vendor_payload (ikep);
698 clib_warning ("unknown payload %u flags %x length %u", payload,
700 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
702 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
703 sa->unsupported_cp = payload;
708 payload = ikep->nextpayload;
714 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
719 u32 len = clib_net_to_host_u32 (ike->length);
720 ike_payload_header_t *ikep = 0;
722 ikev2_sa_transform_t *tr_integ;
724 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
727 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
729 ikep = (ike_payload_header_t *) & ike->payload[p];
730 plen = clib_net_to_host_u16 (ikep->length);
732 if (plen < sizeof (*ikep))
735 if (*payload == IKEV2_PAYLOAD_SK)
737 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
738 last_payload = *payload;
742 clib_warning ("unknown payload %u flags %x length %u", payload,
744 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
746 sa->unsupported_cp = *payload;
751 *payload = ikep->nextpayload;
755 if (last_payload != IKEV2_PAYLOAD_SK)
757 clib_warning ("Last payload must be SK");
762 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
763 (u8 *) ike, len - tr_integ->key_trunc);
765 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
767 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
769 clib_warning ("message integrity check failed");
775 return ikev2_decrypt_data (sa, ikep->payload, plen);
779 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
781 ikev2_main_t *km = &ikev2_main;
785 u32 thread_index = vlib_get_thread_index ();
787 if (!sa->initial_contact)
790 /* find old IKE SAs with the same authenticated identity */
792 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
793 if (tmp->i_id.type != sa->i_id.type ||
794 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
795 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
798 if (sa->rspi != tmp->rspi)
799 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
803 for (i = 0; i < vec_len (delete); i++)
806 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
808 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
810 ikev2_delete_sa (tmp);
814 sa->initial_contact = 0;
818 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
820 ikev2_child_sa_t *first_child_sa;
822 u32 len = clib_net_to_host_u32 (ike->length);
823 u8 payload = ike->nextpayload;
826 ike_payload_header_t *ikep;
829 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
830 "exchange %x flags %x msgid %x length %u",
831 clib_net_to_host_u64 (ike->ispi),
832 clib_net_to_host_u64 (ike->rspi),
833 payload, ike->version,
834 ike->exchange, ike->flags,
835 clib_net_to_host_u32 (ike->msgid), len);
837 ikev2_calc_keys (sa);
839 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
843 if (sa->unsupported_cp)
844 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
845 goto cleanup_and_exit;
848 /* select or create 1st child SA */
849 if (sa->is_initiator)
851 first_child_sa = &sa->childs[0];
855 ikev2_sa_free_all_child_sa (&sa->childs);
856 vec_add2 (sa->childs, first_child_sa, 1);
860 /* process encrypted payload */
862 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
864 ikep = (ike_payload_header_t *) & plaintext[p];
865 plen = clib_net_to_host_u16 (ikep->length);
867 if (plen < sizeof (ike_payload_header_t))
868 goto cleanup_and_exit;
870 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
872 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
873 if (sa->is_initiator)
875 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
876 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
880 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
881 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
884 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
886 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
888 sa->i_id.type = id->id_type;
889 vec_free (sa->i_id.data);
890 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
892 clib_warning ("received payload IDi, len %u id_type %u",
893 plen - sizeof (*id), id->id_type);
895 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
897 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
899 sa->r_id.type = id->id_type;
900 vec_free (sa->r_id.data);
901 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
903 clib_warning ("received payload IDr len %u id_type %u",
904 plen - sizeof (*id), id->id_type);
906 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
908 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
910 if (sa->is_initiator)
912 sa->r_auth.method = a->auth_method;
913 vec_free (sa->r_auth.data);
914 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
918 sa->i_auth.method = a->auth_method;
919 vec_free (sa->i_auth.data);
920 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
923 clib_warning ("received payload AUTH, len %u auth_type %u",
924 plen - sizeof (*a), a->auth_method);
926 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
928 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
929 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
931 sa->initial_contact = 1;
935 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
937 ikev2_parse_vendor_payload (ikep);
939 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
941 clib_warning ("received payload TSi, len %u",
942 plen - sizeof (*ikep));
944 vec_free (first_child_sa->tsi);
945 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
947 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
949 clib_warning ("received payload TSr, len %u",
950 plen - sizeof (*ikep));
952 vec_free (first_child_sa->tsr);
953 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
957 clib_warning ("unknown payload %u flags %x length %u data %u",
958 payload, ikep->flags, plen - 4,
959 format_hex_bytes, ikep->payload, plen - 4);
961 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
963 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
964 sa->unsupported_cp = payload;
969 payload = ikep->nextpayload;
974 vec_free (plaintext);
978 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
982 u32 len = clib_net_to_host_u32 (ike->length);
983 u8 payload = ike->nextpayload;
986 ike_payload_header_t *ikep;
989 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
990 "exchange %x flags %x msgid %x length %u",
991 clib_net_to_host_u64 (ike->ispi),
992 clib_net_to_host_u64 (ike->rspi),
993 payload, ike->version,
994 ike->exchange, ike->flags,
995 clib_net_to_host_u32 (ike->msgid), len);
997 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1000 goto cleanup_and_exit;
1002 /* process encrypted payload */
1004 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1006 ikep = (ike_payload_header_t *) & plaintext[p];
1007 plen = clib_net_to_host_u16 (ikep->length);
1009 if (plen < sizeof (ike_payload_header_t))
1010 goto cleanup_and_exit;
1012 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1014 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1015 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1016 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1019 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1021 sa->del = ikev2_parse_delete_payload (ikep);
1023 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1025 ikev2_parse_vendor_payload (ikep);
1029 clib_warning ("unknown payload %u flags %x length %u data %u",
1030 payload, ikep->flags, plen - 4,
1031 format_hex_bytes, ikep->payload, plen - 4);
1033 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1035 sa->unsupported_cp = payload;
1040 payload = ikep->nextpayload;
1045 vec_free (plaintext);
1049 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1053 u32 len = clib_net_to_host_u32 (ike->length);
1054 u8 payload = ike->nextpayload;
1057 u8 nonce[IKEV2_NONCE_SIZE];
1059 ike_payload_header_t *ikep;
1061 ikev2_notify_t *n = 0;
1062 ikev2_ts_t *tsi = 0;
1063 ikev2_ts_t *tsr = 0;
1064 ikev2_sa_proposal_t *proposal = 0;
1065 ikev2_child_sa_t *child_sa;
1067 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1068 "exchange %x flags %x msgid %x length %u",
1069 clib_net_to_host_u64 (ike->ispi),
1070 clib_net_to_host_u64 (ike->rspi),
1071 payload, ike->version,
1072 ike->exchange, ike->flags,
1073 clib_net_to_host_u32 (ike->msgid), len);
1075 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1078 goto cleanup_and_exit;
1080 /* process encrypted payload */
1082 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1084 ikep = (ike_payload_header_t *) & plaintext[p];
1085 plen = clib_net_to_host_u16 (ikep->length);
1087 if (plen < sizeof (ike_payload_header_t))
1088 goto cleanup_and_exit;
1090 else if (payload == IKEV2_PAYLOAD_SA)
1092 proposal = ikev2_parse_sa_payload (ikep);
1094 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1096 n = ikev2_parse_notify_payload (ikep);
1097 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1102 else if (payload == IKEV2_PAYLOAD_DELETE)
1104 sa->del = ikev2_parse_delete_payload (ikep);
1106 else if (payload == IKEV2_PAYLOAD_VENDOR)
1108 ikev2_parse_vendor_payload (ikep);
1110 else if (payload == IKEV2_PAYLOAD_NONCE)
1112 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1114 else if (payload == IKEV2_PAYLOAD_TSI)
1116 tsi = ikev2_parse_ts_payload (ikep);
1118 else if (payload == IKEV2_PAYLOAD_TSR)
1120 tsr = ikev2_parse_ts_payload (ikep);
1124 clib_warning ("unknown payload %u flags %x length %u data %u",
1125 payload, ikep->flags, plen - 4,
1126 format_hex_bytes, ikep->payload, plen - 4);
1128 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1130 sa->unsupported_cp = payload;
1135 payload = ikep->nextpayload;
1139 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1141 ikev2_rekey_t *rekey = &sa->rekey[0];
1142 rekey->protocol_id = proposal->protocol_id;
1144 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1145 rekey->i_proposal->spi = rekey->spi;
1146 rekey->r_proposal = proposal;
1150 vec_free (sa->r_nonce);
1151 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1152 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1155 child_sa->rekey_retries = 0;
1160 ikev2_rekey_t *rekey;
1161 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1164 clib_warning ("child SA spi %lx not found", n->spi);
1165 goto cleanup_and_exit;
1167 vec_add2 (sa->rekey, rekey, 1);
1168 rekey->protocol_id = n->protocol_id;
1169 rekey->spi = n->spi;
1170 rekey->i_proposal = proposal;
1172 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1176 vec_free (sa->i_nonce);
1177 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1178 /* generate new Nr */
1179 vec_free (sa->r_nonce);
1180 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1181 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1185 vec_free (plaintext);
1190 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1198 ikev2_sa_transform_t *tr_prf;
1201 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1207 nonce = sa->i_nonce;
1208 packet_data = sa->last_sa_init_res_packet_data;
1214 nonce = sa->r_nonce;
1215 packet_data = sa->last_sa_init_req_packet_data;
1218 data = vec_new (u8, 4);
1220 vec_append (data, id->data);
1222 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1223 vec_append (authmsg, packet_data);
1224 vec_append (authmsg, nonce);
1225 vec_append (authmsg, id_hash);
1233 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1235 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1236 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1237 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1238 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1245 ikev2_sa_match_ts (ikev2_sa_t * sa)
1247 ikev2_main_t *km = &ikev2_main;
1249 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1253 pool_foreach (p, km->profiles, ({
1255 if (sa->is_initiator)
1269 if (p->rem_id.type != id->type ||
1270 vec_len(p->rem_id.data) != vec_len(id->data) ||
1271 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1274 vec_foreach(ts, sa->childs[0].tsi)
1276 if (ikev2_ts_cmp(p_tsi, ts))
1283 vec_foreach(ts, sa->childs[0].tsr)
1285 if (ikev2_ts_cmp(p_tsr, ts))
1298 vec_free (sa->childs[0].tsi);
1299 vec_free (sa->childs[0].tsr);
1300 sa->childs[0].tsi = tsi;
1301 sa->childs[0].tsr = tsr;
1307 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1312 ikev2_sa_auth (ikev2_sa_t * sa)
1314 ikev2_main_t *km = &ikev2_main;
1315 ikev2_profile_t *p, *sel_p = 0;
1316 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1317 ikev2_sa_transform_t *tr_prf;
1320 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1322 /* only shared key and rsa signature */
1323 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1324 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1326 clib_warning ("unsupported authentication method %u",
1328 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1332 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1333 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1336 ikev2_auth_t *sa_auth;
1338 if (sa->is_initiator)
1341 sa_auth = &sa->r_auth;
1346 sa_auth = &sa->i_auth;
1350 pool_foreach (p, km->profiles, ({
1353 if (p->rem_id.type != sa_id->type ||
1354 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1355 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1358 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1360 if (!p->auth.data ||
1361 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1364 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1365 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1367 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1369 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1376 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1378 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1381 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1383 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1396 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1398 if (!sa->is_initiator)
1400 vec_free (sa->r_id.data);
1401 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1402 sa->r_id.type = sel_p->loc_id.type;
1404 /* generate our auth data */
1405 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1406 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1408 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1409 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1411 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1413 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1414 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1418 /* select transforms for 1st child sa */
1419 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1420 sa->childs[0].r_proposals =
1421 ikev2_select_proposal (sa->childs[0].i_proposals,
1422 IKEV2_PROTOCOL_ESP);
1427 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1435 ikev2_sa_auth_init (ikev2_sa_t * sa)
1437 ikev2_main_t *km = &ikev2_main;
1438 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1439 ikev2_sa_transform_t *tr_prf;
1442 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1444 /* only shared key and rsa signature */
1445 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1446 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1448 clib_warning ("unsupported authentication method %u",
1450 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1454 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1455 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1456 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1457 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1460 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1462 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1463 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1465 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1467 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1468 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1479 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1480 ikev2_child_sa_t * child)
1482 ikev2_main_t *km = &ikev2_main;
1483 ikev2_profile_t *p = 0;
1484 ipsec_add_del_tunnel_args_t a;
1485 ikev2_sa_transform_t *tr;
1486 ikev2_sa_proposal_t *proposals;
1490 if (!child->r_proposals)
1492 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1496 clib_memset (&a, 0, sizeof (a));
1498 if (sa->is_initiator)
1500 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1501 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1502 proposals = child->i_proposals;
1503 a.local_spi = child->r_proposals[0].spi;
1504 a.remote_spi = child->i_proposals[0].spi;
1508 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1509 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1510 proposals = child->r_proposals;
1511 a.local_spi = child->i_proposals[0].spi;
1512 a.remote_spi = child->r_proposals[0].spi;
1516 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1518 a.esn = tr->esn_type;
1522 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1525 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1527 switch (tr->key_len)
1530 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1533 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1536 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1539 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1544 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM
1547 switch (tr->key_len)
1550 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1553 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1556 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1559 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1566 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1572 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1576 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1579 switch (tr->integ_type)
1581 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1582 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1584 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1585 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1587 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1588 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1590 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1591 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1594 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1600 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1604 ikev2_calc_child_keys (sa, child);
1606 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1607 if (sa->is_initiator)
1609 loc_ikey = child->sk_ai;
1610 rem_ikey = child->sk_ar;
1611 loc_ckey = child->sk_ei;
1612 rem_ckey = child->sk_er;
1616 loc_ikey = child->sk_ar;
1617 rem_ikey = child->sk_ai;
1618 loc_ckey = child->sk_er;
1619 rem_ckey = child->sk_ei;
1622 a.integ_alg = integ_type;
1623 a.local_integ_key_len = vec_len (loc_ikey);
1624 clib_memcpy_fast (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1625 a.remote_integ_key_len = vec_len (rem_ikey);
1626 clib_memcpy_fast (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1628 a.crypto_alg = encr_type;
1629 a.local_crypto_key_len = vec_len (loc_ckey);
1630 clib_memcpy_fast (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1631 a.remote_crypto_key_len = vec_len (rem_ckey);
1632 clib_memcpy_fast (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1634 if (sa->is_profile_index_set)
1635 p = pool_elt_at_index (km->profiles, sa->profile_index);
1637 if (p && p->lifetime)
1639 child->time_to_expiration =
1640 vlib_time_now (vnm->vlib_main) + p->lifetime;
1641 if (p->lifetime_jitter)
1643 // This is not much better than rand(3), which Coverity warns
1644 // is unsuitable for security applications; random_u32 is
1645 // however fast. If this perturbance to the expiration time
1646 // needs to use a better RNG then we may need to use something
1647 // like /dev/urandom which has significant overhead.
1648 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1649 rnd = random_u32 (&rnd);
1651 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1655 ipsec_add_del_tunnel_if (&a);
1661 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1662 ikev2_child_sa_t * child)
1664 ipsec_add_del_tunnel_args_t a;
1666 if (sa->is_initiator)
1668 if (!vec_len (child->i_proposals))
1672 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1673 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1674 a.local_spi = child->r_proposals[0].spi;
1675 a.remote_spi = child->i_proposals[0].spi;
1679 if (!vec_len (child->r_proposals))
1683 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1684 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1685 a.local_spi = child->i_proposals[0].spi;
1686 a.remote_spi = child->r_proposals[0].spi;
1689 ipsec_add_del_tunnel_if (&a);
1694 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1697 ike_payload_header_t *ph;
1701 ikev2_sa_transform_t *tr_encr, *tr_integ;
1703 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1705 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1707 ikev2_payload_chain_t *chain = 0;
1708 ikev2_payload_new_chain (chain);
1710 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1712 if (sa->r_proposals == 0)
1714 ikev2_payload_add_notify (chain,
1715 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1716 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1718 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1720 u8 *data = vec_new (u8, 2);
1721 ikev2_sa_transform_t *tr_dh;
1723 ikev2_sa_get_td_for_type (sa->r_proposals,
1724 IKEV2_TRANSFORM_TYPE_DH);
1725 ASSERT (tr_dh && tr_dh->dh_type);
1727 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1728 data[1] = (tr_dh->dh_type) & 0xff;
1730 ikev2_payload_add_notify (chain,
1731 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1734 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1736 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1738 u8 *data = vec_new (u8, 1);
1740 data[0] = sa->unsupported_cp;
1741 ikev2_payload_add_notify (chain,
1742 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1748 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1749 ikev2_payload_add_sa (chain, sa->r_proposals);
1750 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1751 ikev2_payload_add_nonce (chain, sa->r_nonce);
1754 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1756 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1758 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1759 ikev2_payload_add_auth (chain, &sa->r_auth);
1760 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1761 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1762 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1764 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1766 ikev2_payload_add_notify (chain,
1767 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1769 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1771 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1773 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1775 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1776 ikev2_payload_add_auth (chain, &sa->r_auth);
1778 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1780 ikev2_payload_add_notify (chain,
1781 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1782 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1783 ikev2_payload_add_auth (chain, &sa->r_auth);
1784 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1785 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1787 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1789 u8 *data = vec_new (u8, 1);
1791 data[0] = sa->unsupported_cp;
1792 ikev2_payload_add_notify (chain,
1793 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1797 else if (sa->state == IKEV2_STATE_SA_INIT)
1799 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1800 ikev2_payload_add_auth (chain, &sa->i_auth);
1801 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1802 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1803 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1807 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1811 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1813 /* if pending delete */
1816 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1818 if (sa->is_initiator)
1819 ikev2_payload_add_delete (chain, sa->del);
1821 /* The response to a request that deletes the IKE SA is an empty
1822 INFORMATIONAL response. */
1823 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1825 /* The response to a request that deletes ESP or AH SAs will contain
1826 delete payloads for the paired SAs going in the other direction. */
1829 ikev2_payload_add_delete (chain, sa->del);
1834 /* received N(AUTHENTICATION_FAILED) */
1835 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1837 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1840 /* received unsupported critical payload */
1841 else if (sa->unsupported_cp)
1843 u8 *data = vec_new (u8, 1);
1845 data[0] = sa->unsupported_cp;
1846 ikev2_payload_add_notify (chain,
1847 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1850 sa->unsupported_cp = 0;
1852 /* else send empty response */
1854 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1856 if (sa->is_initiator)
1859 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1860 ikev2_notify_t notify;
1861 u8 *data = vec_new (u8, 4);
1862 clib_memset (¬ify, 0, sizeof (notify));
1863 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1864 notify.spi = sa->childs[0].i_proposals->spi;
1865 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1867 ikev2_payload_add_sa (chain, proposals);
1868 ikev2_payload_add_nonce (chain, sa->i_nonce);
1869 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1870 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1871 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1880 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1881 ikev2_payload_add_nonce (chain, sa->r_nonce);
1882 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1884 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1886 vec_del1 (sa->rekey, 0);
1888 else if (sa->unsupported_cp)
1890 u8 *data = vec_new (u8, 1);
1892 data[0] = sa->unsupported_cp;
1893 ikev2_payload_add_notify (chain,
1894 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1897 sa->unsupported_cp = 0;
1901 ikev2_payload_add_notify (chain,
1902 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1909 ike->version = IKE_VERSION_2;
1910 ike->nextpayload = IKEV2_PAYLOAD_SK;
1911 tlen = sizeof (*ike);
1912 if (sa->is_initiator)
1914 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1915 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1919 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1923 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1925 tlen += vec_len (chain->data);
1926 ike->nextpayload = chain->first_payload_type;
1927 ike->length = clib_host_to_net_u32 (tlen);
1928 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
1930 /* store whole IKE payload - needed for PSK auth */
1931 vec_free (sa->last_sa_init_res_packet_data);
1932 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1937 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1940 plen = sizeof (*ph);
1941 ph = (ike_payload_header_t *) & ike->payload[0];
1942 ph->nextpayload = chain->first_payload_type;
1944 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1947 /* add space for hmac */
1948 plen += tr_integ->key_trunc;
1951 /* payload and total length */
1952 ph->length = clib_host_to_net_u16 (plen);
1953 ike->length = clib_host_to_net_u32 (tlen);
1955 /* calc integrity data for whole packet except hash itself */
1957 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1958 (u8 *) ike, tlen - tr_integ->key_trunc);
1960 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
1961 sizeof (*ike), integ, tr_integ->key_trunc);
1963 /* store whole IKE payload - needed for retransmit */
1964 vec_free (sa->last_res_packet_data);
1965 vec_add (sa->last_res_packet_data, ike, tlen);
1969 ikev2_payload_destroy_chain (chain);
1975 ikev2_retransmit_sa_init (ike_header_t * ike,
1976 ip4_address_t iaddr, ip4_address_t raddr)
1978 ikev2_main_t *km = &ikev2_main;
1980 u32 thread_index = vlib_get_thread_index ();
1983 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1984 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1985 sa->iaddr.as_u32 == iaddr.as_u32 &&
1986 sa->raddr.as_u32 == raddr.as_u32)
1989 u32 len = clib_net_to_host_u32(ike->length);
1990 u8 payload = ike->nextpayload;
1992 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1993 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1994 u32 plen = clib_net_to_host_u16(ikep->length);
1996 if (plen < sizeof(ike_payload_header_t))
1999 if (payload == IKEV2_PAYLOAD_NONCE)
2001 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2003 /* req is retransmit */
2004 if (sa->state == IKEV2_STATE_SA_INIT)
2007 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2008 ike->ispi = tmp->ispi;
2009 ike->rspi = tmp->rspi;
2010 ike->nextpayload = tmp->nextpayload;
2011 ike->version = tmp->version;
2012 ike->exchange = tmp->exchange;
2013 ike->flags = tmp->flags;
2014 ike->msgid = tmp->msgid;
2015 ike->length = tmp->length;
2016 clib_memcpy_fast(ike->payload, tmp->payload,
2017 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2018 clib_warning("IKE_SA_INIT retransmit from %U to %U",
2019 format_ip4_address, &raddr,
2020 format_ip4_address, &iaddr);
2023 /* else ignore req */
2026 clib_warning("IKE_SA_INIT ignore from %U to %U",
2027 format_ip4_address, &raddr,
2028 format_ip4_address, &iaddr);
2033 payload = ikep->nextpayload;
2040 /* req is not retransmit */
2045 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2047 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2050 if (msg_id > sa->last_msg_id)
2052 sa->last_msg_id = msg_id;
2055 /* retransmitted req */
2056 else if (msg_id == sa->last_msg_id)
2059 tmp = (ike_header_t *) sa->last_res_packet_data;
2060 ike->ispi = tmp->ispi;
2061 ike->rspi = tmp->rspi;
2062 ike->nextpayload = tmp->nextpayload;
2063 ike->version = tmp->version;
2064 ike->exchange = tmp->exchange;
2065 ike->flags = tmp->flags;
2066 ike->msgid = tmp->msgid;
2067 ike->length = tmp->length;
2068 clib_memcpy_fast (ike->payload, tmp->payload,
2069 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2070 clib_warning ("IKE msgid %u retransmit from %U to %U",
2072 format_ip4_address, &sa->raddr,
2073 format_ip4_address, &sa->iaddr);
2076 /* old req ignore */
2079 clib_warning ("IKE msgid %u req ignore from %U to %U",
2081 format_ip4_address, &sa->raddr,
2082 format_ip4_address, &sa->iaddr);
2089 ikev2_node_fn (vlib_main_t * vm,
2090 vlib_node_runtime_t * node, vlib_frame_t * frame)
2092 u32 n_left_from, *from, *to_next;
2093 ikev2_next_t next_index;
2094 ikev2_main_t *km = &ikev2_main;
2095 u32 thread_index = vlib_get_thread_index ();
2097 from = vlib_frame_vector_args (frame);
2098 n_left_from = frame->n_vectors;
2099 next_index = node->cached_next_index;
2101 while (n_left_from > 0)
2105 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2107 while (n_left_from > 0 && n_left_to_next > 0)
2111 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2116 ikev2_sa_t *sa0 = 0;
2117 ikev2_sa_t sa; /* temporary store for SA */
2121 /* speculatively enqueue b0 to the current next frame */
2127 n_left_to_next -= 1;
2129 b0 = vlib_get_buffer (vm, bi0);
2130 ike0 = vlib_buffer_get_current (b0);
2131 vlib_buffer_advance (b0, -sizeof (*udp0));
2132 udp0 = vlib_buffer_get_current (b0);
2133 vlib_buffer_advance (b0, -sizeof (*ip40));
2134 ip40 = vlib_buffer_get_current (b0);
2136 if (ike0->version != IKE_VERSION_2)
2138 vlib_node_increment_counter (vm, ikev2_node.index,
2139 IKEV2_ERROR_NOT_IKEV2, 1);
2143 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2146 clib_memset (sa0, 0, sizeof (*sa0));
2148 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2150 if (ike0->rspi == 0)
2152 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2153 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2155 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2159 vlib_node_increment_counter (vm, ikev2_node.index,
2160 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2162 len = clib_net_to_host_u32 (ike0->length);
2167 vlib_node_increment_counter (vm, ikev2_node.index,
2168 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2173 ikev2_process_sa_init_req (vm, sa0, ike0);
2175 if (sa0->state == IKEV2_STATE_SA_INIT)
2177 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2179 ikev2_select_proposal (sa0->i_proposals,
2180 IKEV2_PROTOCOL_IKE);
2181 ikev2_generate_sa_init_data (sa0);
2184 if (sa0->state == IKEV2_STATE_SA_INIT
2185 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2187 len = ikev2_generate_message (sa0, ike0, 0);
2190 if (sa0->state == IKEV2_STATE_SA_INIT)
2192 /* add SA to the pool */
2193 pool_get (km->per_thread_data[thread_index].sas,
2195 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2197 per_thread_data[thread_index].sa_by_rspi,
2200 km->per_thread_data[thread_index].sas);
2204 ikev2_sa_free_all_vec (sa0);
2208 else //received sa_init without initiator flag
2210 ikev2_process_sa_init_resp (vm, sa0, ike0);
2212 if (sa0->state == IKEV2_STATE_SA_INIT)
2214 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2215 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2219 pool_elt_at_index (km->sais, p[0]);
2221 ikev2_complete_sa_data (sa0, sai);
2222 ikev2_calc_keys (sa0);
2223 ikev2_sa_auth_init (sa0);
2224 len = ikev2_generate_message (sa0, ike0, 0);
2228 if (sa0->state == IKEV2_STATE_SA_INIT)
2230 /* add SA to the pool */
2231 pool_get (km->per_thread_data[thread_index].sas, sa0);
2232 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2233 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2235 sa0 - km->per_thread_data[thread_index].sas);
2239 ikev2_sa_free_all_vec (sa0);
2243 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2246 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2247 clib_net_to_host_u64 (ike0->rspi));
2251 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2254 r = ikev2_retransmit_resp (sa0, ike0);
2257 vlib_node_increment_counter (vm, ikev2_node.index,
2258 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2260 len = clib_net_to_host_u32 (ike0->length);
2265 vlib_node_increment_counter (vm, ikev2_node.index,
2266 IKEV2_ERROR_IKE_REQ_IGNORE,
2271 ikev2_process_auth_req (vm, sa0, ike0);
2272 ikev2_sa_auth (sa0);
2273 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2275 ikev2_initial_contact_cleanup (sa0);
2276 ikev2_sa_match_ts (sa0);
2277 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2278 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2282 if (sa0->is_initiator)
2284 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2288 pool_elt_at_index (km->sais, p[0]);
2289 hash_unset (km->sa_by_ispi, sai->ispi);
2290 ikev2_sa_free_all_vec (sai);
2291 pool_put (km->sais, sai);
2296 len = ikev2_generate_message (sa0, ike0, 0);
2300 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2303 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2304 clib_net_to_host_u64 (ike0->rspi));
2308 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2311 r = ikev2_retransmit_resp (sa0, ike0);
2314 vlib_node_increment_counter (vm, ikev2_node.index,
2315 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2317 len = clib_net_to_host_u32 (ike0->length);
2322 vlib_node_increment_counter (vm, ikev2_node.index,
2323 IKEV2_ERROR_IKE_REQ_IGNORE,
2328 ikev2_process_informational_req (vm, sa0, ike0);
2331 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2333 ikev2_delete_t *d, *tmp, *resp = 0;
2334 vec_foreach (d, sa0->del)
2336 ikev2_child_sa_t *ch_sa;
2337 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2339 !sa0->is_initiator);
2342 ikev2_delete_tunnel_interface (km->vnet_main,
2344 if (!sa0->is_initiator)
2346 vec_add2 (resp, tmp, 1);
2347 tmp->protocol_id = d->protocol_id;
2348 tmp->spi = ch_sa->r_proposals[0].spi;
2350 ikev2_sa_del_child_sa (sa0, ch_sa);
2353 if (!sa0->is_initiator)
2355 vec_free (sa0->del);
2360 if (!sa0->is_initiator)
2362 len = ikev2_generate_message (sa0, ike0, 0);
2366 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2369 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2370 clib_net_to_host_u64 (ike0->rspi));
2374 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2377 r = ikev2_retransmit_resp (sa0, ike0);
2380 vlib_node_increment_counter (vm, ikev2_node.index,
2381 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2383 len = clib_net_to_host_u32 (ike0->length);
2388 vlib_node_increment_counter (vm, ikev2_node.index,
2389 IKEV2_ERROR_IKE_REQ_IGNORE,
2394 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2397 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2399 ikev2_child_sa_t *child;
2400 vec_add2 (sa0->childs, child, 1);
2401 child->r_proposals = sa0->rekey[0].r_proposal;
2402 child->i_proposals = sa0->rekey[0].i_proposal;
2403 child->tsi = sa0->rekey[0].tsi;
2404 child->tsr = sa0->rekey[0].tsr;
2405 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2408 if (sa0->is_initiator)
2410 vec_del1 (sa0->rekey, 0);
2414 len = ikev2_generate_message (sa0, ike0, 0);
2421 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2423 format_ip4_address, ip40->src_address.as_u8,
2424 format_ip4_address, ip40->dst_address.as_u8);
2428 /* if we are sending packet back, rewrite headers */
2431 next0 = IKEV2_NEXT_IP4_LOOKUP;
2432 if (sa0->is_initiator)
2434 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2435 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2439 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2440 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2443 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2445 b0->current_length =
2446 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2447 ip40->length = clib_host_to_net_u16 (b0->current_length);
2448 ip40->checksum = ip4_header_checksum (ip40);
2451 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2452 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2454 ikev2_child_sa_t *c;
2456 vec_foreach (c, sa0->childs)
2457 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2459 ikev2_delete_sa (sa0);
2461 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2463 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2464 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2466 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2467 t->sw_if_index = sw_if_index0;
2468 t->next_index = next0;
2471 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2472 n_left_to_next, bi0, next0);
2475 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2478 vlib_node_increment_counter (vm, ikev2_node.index,
2479 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2480 return frame->n_vectors;
2484 VLIB_REGISTER_NODE (ikev2_node,static) = {
2485 .function = ikev2_node_fn,
2487 .vector_size = sizeof (u32),
2488 .format_trace = format_ikev2_trace,
2489 .type = VLIB_NODE_TYPE_INTERNAL,
2491 .n_errors = ARRAY_LEN(ikev2_error_strings),
2492 .error_strings = ikev2_error_strings,
2494 .n_next_nodes = IKEV2_N_NEXT,
2497 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2498 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2503 // set ikev2 proposals when vpp is used as initiator
2504 static clib_error_t *
2505 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2506 ikev2_transforms_set * ts,
2507 ikev2_sa_proposal_t ** proposals, int is_ike)
2510 ikev2_main_t *km = &ikev2_main;
2511 ikev2_sa_proposal_t *proposal;
2512 vec_add2 (*proposals, proposal, 1);
2513 ikev2_sa_transform_t *td;
2518 vec_foreach (td, km->supported_transforms)
2520 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2521 && td->encr_type == ts->crypto_alg
2522 && td->key_len == ts->crypto_key_size / 8)
2525 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2526 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2527 vec_add (td->attrs, (u8 *) attr, 4);
2528 vec_add1 (proposal->transforms, *td);
2537 r = clib_error_return (0, "Unsupported algorithm");
2543 vec_foreach (td, km->supported_transforms)
2545 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2546 && td->integ_type == ts->integ_alg)
2548 vec_add1 (proposal->transforms, *td);
2556 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2557 r = clib_error_return (0, "Unsupported algorithm");
2565 vec_foreach (td, km->supported_transforms)
2567 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2568 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2570 vec_add1 (proposal->transforms, *td);
2577 r = clib_error_return (0, "Unsupported algorithm");
2583 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2586 vec_foreach (td, km->supported_transforms)
2588 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2590 vec_add1 (proposal->transforms, *td);
2593 sa->dh_group = td->dh_type;
2601 r = clib_error_return (0, "Unsupported algorithm");
2609 vec_foreach (td, km->supported_transforms)
2611 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2613 vec_add1 (proposal->transforms, *td);
2620 r = clib_error_return (0, "Unsupported algorithm");
2629 static ikev2_profile_t *
2630 ikev2_profile_index_by_name (u8 * name)
2632 ikev2_main_t *km = &ikev2_main;
2635 p = mhash_get (&km->profile_index_by_name, name);
2639 return pool_elt_at_index (km->profiles, p[0]);
2644 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2653 b0 = vlib_get_buffer (vm, bi0);
2654 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2655 udp0 = vlib_buffer_get_current (b0);
2656 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2657 ip40 = vlib_buffer_get_current (b0);
2660 ip40->ip_version_and_header_length = 0x45;
2662 ip40->fragment_id = 0;
2663 ip40->flags_and_fragment_offset = 0;
2665 ip40->protocol = IP_PROTOCOL_UDP;
2666 ip40->dst_address.as_u32 = dst->as_u32;
2667 ip40->src_address.as_u32 = src->as_u32;
2668 udp0->dst_port = clib_host_to_net_u16 (500);
2669 udp0->src_port = clib_host_to_net_u16 (500);
2670 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2672 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2673 ip40->length = clib_host_to_net_u16 (b0->current_length);
2674 ip40->checksum = ip4_header_checksum (ip40);
2677 /* send the request */
2678 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2679 to_next = vlib_frame_vector_args (f);
2682 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2687 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2690 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2695 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2696 *ike = vlib_buffer_get_current (b0);
2701 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2703 ikev2_main_t *km = &ikev2_main;
2705 km->pkey = ikev2_load_key_file (file);
2706 if (km->pkey == NULL)
2707 return clib_error_return (0, "load key '%s' failed", file);
2713 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2715 ikev2_main_t *km = &ikev2_main;
2720 if (ikev2_profile_index_by_name (name))
2721 return clib_error_return (0, "policy %v already exists", name);
2723 pool_get (km->profiles, p);
2724 clib_memset (p, 0, sizeof (*p));
2725 p->name = vec_dup (name);
2726 p->responder.sw_if_index = ~0;
2727 uword index = p - km->profiles;
2728 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2732 p = ikev2_profile_index_by_name (name);
2734 return clib_error_return (0, "policy %v does not exists", name);
2737 pool_put (km->profiles, p);
2738 mhash_unset (&km->profile_index_by_name, name, 0);
2744 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2745 u8 * auth_data, u8 data_hex_format)
2750 p = ikev2_profile_index_by_name (name);
2754 r = clib_error_return (0, "unknown profile %v", name);
2757 vec_free (p->auth.data);
2758 p->auth.method = auth_method;
2759 p->auth.data = vec_dup (auth_data);
2760 p->auth.hex = data_hex_format;
2762 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2764 vec_add1 (p->auth.data, 0);
2766 EVP_PKEY_free (p->auth.key);
2767 p->auth.key = ikev2_load_cert_file (auth_data);
2768 if (p->auth.key == NULL)
2769 return clib_error_return (0, "load cert '%s' failed", auth_data);
2776 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2782 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2783 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2785 r = clib_error_return (0, "unsupported identity type %U",
2786 format_ikev2_id_type, id_type);
2790 p = ikev2_profile_index_by_name (name);
2794 r = clib_error_return (0, "unknown profile %v", name);
2800 vec_free (p->loc_id.data);
2801 p->loc_id.type = id_type;
2802 p->loc_id.data = vec_dup (data);
2806 vec_free (p->rem_id.data);
2807 p->rem_id.type = id_type;
2808 p->rem_id.data = vec_dup (data);
2815 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2816 u16 start_port, u16 end_port, ip4_address_t start_addr,
2817 ip4_address_t end_addr, int is_local)
2822 p = ikev2_profile_index_by_name (name);
2826 r = clib_error_return (0, "unknown profile %v", name);
2832 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2833 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2834 p->loc_ts.start_port = start_port;
2835 p->loc_ts.end_port = end_port;
2836 p->loc_ts.protocol_id = protocol_id;
2837 p->loc_ts.ts_type = 7;
2841 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2842 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2843 p->rem_ts.start_port = start_port;
2844 p->rem_ts.end_port = end_port;
2845 p->rem_ts.protocol_id = protocol_id;
2846 p->rem_ts.ts_type = 7;
2854 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2855 u32 sw_if_index, ip4_address_t ip4)
2860 p = ikev2_profile_index_by_name (name);
2864 r = clib_error_return (0, "unknown profile %v", name);
2868 p->responder.sw_if_index = sw_if_index;
2869 p->responder.ip4 = ip4;
2875 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2876 ikev2_transform_encr_type_t crypto_alg,
2877 ikev2_transform_integ_type_t integ_alg,
2878 ikev2_transform_dh_type_t dh_type,
2879 u32 crypto_key_size)
2884 p = ikev2_profile_index_by_name (name);
2888 r = clib_error_return (0, "unknown profile %v", name);
2892 p->ike_ts.crypto_alg = crypto_alg;
2893 p->ike_ts.integ_alg = integ_alg;
2894 p->ike_ts.dh_type = dh_type;
2895 p->ike_ts.crypto_key_size = crypto_key_size;
2900 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2901 ikev2_transform_encr_type_t crypto_alg,
2902 ikev2_transform_integ_type_t integ_alg,
2903 ikev2_transform_dh_type_t dh_type,
2904 u32 crypto_key_size)
2909 p = ikev2_profile_index_by_name (name);
2913 r = clib_error_return (0, "unknown profile %v", name);
2917 p->esp_ts.crypto_alg = crypto_alg;
2918 p->esp_ts.integ_alg = integ_alg;
2919 p->esp_ts.dh_type = dh_type;
2920 p->esp_ts.crypto_key_size = crypto_key_size;
2925 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2926 u64 lifetime, u32 jitter, u32 handover,
2932 p = ikev2_profile_index_by_name (name);
2936 r = clib_error_return (0, "unknown profile %v", name);
2940 p->lifetime = lifetime;
2941 p->lifetime_jitter = jitter;
2942 p->handover = handover;
2943 p->lifetime_maxdata = maxdata;
2948 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2952 ip4_main_t *im = &ip4_main;
2953 ikev2_main_t *km = &ikev2_main;
2955 p = ikev2_profile_index_by_name (name);
2959 r = clib_error_return (0, "unknown profile %v", name);
2963 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2965 r = clib_error_return (0, "responder not set for profile %v", name);
2970 /* Create the Initiator Request */
2974 ip_lookup_main_t *lm = &im->lookup_main;
2976 int len = sizeof (ike_header_t);
2978 /* Get own iface IP */
2980 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2981 ip_interface_address_t *if_add =
2982 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2983 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2985 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2987 /* Prepare the SA and the IKE payload */
2989 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
2990 ikev2_payload_chain_t *chain = 0;
2991 ikev2_payload_new_chain (chain);
2993 /* Build the IKE proposal payload */
2994 ikev2_sa_proposal_t *proposals = 0;
2995 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2996 proposals[0].proposal_num = 1;
2997 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2999 /* Add and then cleanup proposal data */
3000 ikev2_payload_add_sa (chain, proposals);
3001 ikev2_sa_free_proposal_vector (&proposals);
3003 sa.is_initiator = 1;
3004 sa.profile_index = km->profiles - p;
3005 sa.is_profile_index_set = 1;
3006 sa.state = IKEV2_STATE_SA_INIT;
3007 ikev2_generate_sa_init_data (&sa);
3008 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3009 ikev2_payload_add_nonce (chain, sa.i_nonce);
3011 /* Build the child SA proposal */
3012 vec_resize (sa.childs, 1);
3013 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3014 &sa.childs[0].i_proposals, 0);
3015 sa.childs[0].i_proposals[0].proposal_num = 1;
3016 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3017 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3018 sizeof (sa.childs[0].i_proposals[0].spi));
3022 /* Add NAT detection notification messages (mandatory) */
3023 u8 nat_detection_source[8 + 8 + 4 + 2];
3024 u8 *nat_detection_sha1 = vec_new (u8, 20);
3026 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3027 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3028 tmpspi = clib_host_to_net_u64 (sa.rspi);
3029 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3030 u16 tmpport = clib_host_to_net_u16 (500);
3031 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3033 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3034 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3035 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3036 nat_detection_sha1);
3037 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3038 nat_detection_sha1);
3039 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3040 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3041 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3042 nat_detection_sha1);
3043 ikev2_payload_add_notify (chain,
3044 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3045 nat_detection_sha1);
3046 vec_free (nat_detection_sha1);
3048 u8 *sig_hash_algo = vec_new (u8, 8);
3049 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3050 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3051 ikev2_payload_add_notify (chain,
3052 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3054 vec_free (sig_hash_algo);
3057 /* Buffer update and boilerplate */
3058 len += vec_len (chain->data);
3059 ike0->nextpayload = chain->first_payload_type;
3060 ike0->length = clib_host_to_net_u32 (len);
3061 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3062 ikev2_payload_destroy_chain (chain);
3064 ike0->version = IKE_VERSION_2;
3065 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3066 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3067 ike0->ispi = sa.ispi;
3071 /* store whole IKE payload - needed for PSK auth */
3072 vec_free (sa.last_sa_init_req_packet_data);
3073 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3075 /* add data to the SA then add it to the pool */
3076 sa.iaddr.as_u32 = if_ip->as_u32;
3077 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3078 sa.i_id.type = p->loc_id.type;
3079 sa.i_id.data = vec_dup (p->loc_id.data);
3080 sa.i_auth.method = p->auth.method;
3081 sa.i_auth.hex = p->auth.hex;
3082 sa.i_auth.data = vec_dup (p->auth.data);
3083 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3084 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3086 /* add SA to the pool */
3087 ikev2_sa_t *sa0 = 0;
3088 pool_get (km->sais, sa0);
3089 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3090 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3092 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3100 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3101 ikev2_child_sa_t * csa)
3103 /* Create the Initiator notification for child SA removal */
3104 ikev2_main_t *km = &ikev2_main;
3109 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3112 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3113 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3114 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3115 vec_resize (sa->del, 1);
3116 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3117 sa->del->spi = csa->i_proposals->spi;
3118 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3119 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3120 len = ikev2_generate_message (sa, ike0, 0);
3122 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3124 /* delete local child SA */
3125 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3126 ikev2_sa_del_child_sa (sa, csa);
3130 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3133 ikev2_main_t *km = &ikev2_main;
3134 ikev2_main_per_thread_data_t *tkm;
3135 ikev2_sa_t *fsa = 0;
3136 ikev2_child_sa_t *fchild = 0;
3138 /* Search for the child SA */
3139 vec_foreach (tkm, km->per_thread_data)
3145 pool_foreach (sa, tkm->sas, ({
3146 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3156 if (!fchild || !fsa)
3158 r = clib_error_return (0, "Child SA not found");
3163 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3170 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3173 ikev2_main_t *km = &ikev2_main;
3174 ikev2_main_per_thread_data_t *tkm;
3175 ikev2_sa_t *fsa = 0;
3176 ikev2_main_per_thread_data_t *ftkm = 0;
3178 /* Search for the IKE SA */
3179 vec_foreach (tkm, km->per_thread_data)
3185 pool_foreach (sa, tkm->sas, ({
3186 if (sa->ispi == ispi)
3198 r = clib_error_return (0, "IKE SA not found");
3203 /* Create the Initiator notification for IKE SA removal */
3209 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3212 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3213 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3214 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3215 vec_resize (fsa->del, 1);
3216 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3217 fsa->del->spi = ispi;
3218 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3219 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3220 len = ikev2_generate_message (fsa, ike0, 0);
3222 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3226 /* delete local SA */
3227 ikev2_child_sa_t *c;
3228 vec_foreach (c, fsa->childs)
3230 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3231 ikev2_sa_del_child_sa (fsa, c);
3233 ikev2_sa_free_all_vec (fsa);
3234 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3237 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3238 pool_put (ftkm->sas, fsa);
3246 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3247 ikev2_child_sa_t * csa)
3249 /* Create the Initiator request for create child SA */
3255 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3258 ike0->version = IKE_VERSION_2;
3259 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3260 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3261 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3262 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3263 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3264 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3266 ikev2_rekey_t *rekey;
3267 vec_add2 (sa->rekey, rekey, 1);
3268 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3271 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3272 rekey->spi = proposals[0].spi;
3273 rekey->ispi = csa->i_proposals->spi;
3274 len = ikev2_generate_message (sa, ike0, proposals);
3275 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3276 vec_free (proposals);
3280 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3283 ikev2_main_t *km = &ikev2_main;
3284 ikev2_main_per_thread_data_t *tkm;
3285 ikev2_sa_t *fsa = 0;
3286 ikev2_child_sa_t *fchild = 0;
3288 /* Search for the child SA */
3289 vec_foreach (tkm, km->per_thread_data)
3295 pool_foreach (sa, tkm->sas, ({
3296 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3306 if (!fchild || !fsa)
3308 r = clib_error_return (0, "Child SA not found");
3313 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3320 ikev2_init (vlib_main_t * vm)
3322 ikev2_main_t *km = &ikev2_main;
3323 vlib_thread_main_t *tm = vlib_get_thread_main ();
3326 clib_memset (km, 0, sizeof (ikev2_main_t));
3327 km->vnet_main = vnet_get_main ();
3330 ikev2_crypto_init (km);
3332 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3334 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3335 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3337 km->per_thread_data[thread_id].sa_by_rspi =
3338 hash_create (0, sizeof (uword));
3341 km->sa_by_ispi = hash_create (0, sizeof (uword));
3343 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3345 ikev2_cli_reference ();
3351 VLIB_INIT_FUNCTION (ikev2_init) =
3353 .runs_after = VLIB_INITS("ipsec_init"),
3359 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3361 ikev2_main_t *km = &ikev2_main;
3362 ikev2_profile_t *p = 0;
3363 vlib_main_t *vm = km->vlib_main;
3364 f64 now = vlib_time_now (vm);
3367 if (sa->is_profile_index_set)
3368 p = pool_elt_at_index (km->profiles, sa->profile_index);
3370 if (sa->is_initiator && p && csa->time_to_expiration
3371 && now > csa->time_to_expiration)
3373 if (!csa->is_expired || csa->rekey_retries > 0)
3375 ikev2_rekey_child_sa_internal (vm, sa, csa);
3376 csa->time_to_expiration = now + p->handover;
3377 csa->is_expired = 1;
3378 if (csa->rekey_retries == 0)
3380 csa->rekey_retries = 5;
3382 else if (csa->rekey_retries > 0)
3384 csa->rekey_retries--;
3385 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3386 csa->i_proposals->spi, csa->rekey_retries);
3387 if (csa->rekey_retries == 0)
3389 csa->rekey_retries = -1;
3396 csa->time_to_expiration = 0;
3397 ikev2_delete_child_sa_internal (vm, sa, csa);
3406 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3408 ikev2_main_t *km = &ikev2_main;
3409 vlib_main_t *vm = km->vlib_main;
3410 ikev2_main_per_thread_data_t *tkm;
3411 ikev2_sa_t *fsa = 0;
3412 ikev2_profile_t *p = 0;
3413 ikev2_child_sa_t *fchild = 0;
3414 f64 now = vlib_time_now (vm);
3415 vlib_counter_t counts;
3417 /* Search for the SA and child SA */
3418 vec_foreach (tkm, km->per_thread_data)
3424 pool_foreach (sa, tkm->sas, ({
3425 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3434 vlib_get_combined_counter (&ipsec_sa_counters,
3435 ipsec_sa->stat_index, &counts);
3437 if (fsa && fsa->is_profile_index_set)
3438 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3440 if (fchild && p && p->lifetime_maxdata)
3442 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3444 fchild->time_to_expiration = now;
3449 static vlib_node_registration_t ikev2_mngr_process_node;
3452 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3455 ikev2_main_t *km = &ikev2_main;
3456 ipsec_main_t *im = &ipsec_main;
3461 vlib_process_wait_for_event_or_clock (vm, 1);
3462 vlib_process_get_events (vm, NULL);
3464 /* process ike child sas */
3465 ikev2_main_per_thread_data_t *tkm;
3466 vec_foreach (tkm, km->per_thread_data)
3470 pool_foreach (sa, tkm->sas, ({
3471 ikev2_child_sa_t *c;
3472 vec_foreach (c, sa->childs)
3474 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3480 /* process ipsec sas */
3483 pool_foreach (sa, im->sad, ({
3484 ikev2_mngr_process_ipsec_sa(sa);
3490 vlib_process_wait_for_event_or_clock (vm, 5);
3491 vlib_process_get_events (vm, NULL);
3500 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3501 .function = ikev2_mngr_process_fn,
3502 .type = VLIB_NODE_TYPE_PROCESS,
3504 "ikev2-manager-process",
3507 VLIB_PLUGIN_REGISTER () = {
3508 .version = VPP_BUILD_VER,
3509 .description = "Internet Key Exchange (IKEv2) Protocol",
3514 * fd.io coding-style-patch-verification: ON
3517 * eval: (c-set-style "gnu")