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 <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
32 #define IKEV2_LIVENESS_RETRIES 2
33 #define IKEV2_LIVENESS_PERIOD_CHECK 30
35 ikev2_main_t ikev2_main;
37 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
39 ikev2_child_sa_t * child);
41 #define ikev2_set_state(sa, v) do { \
43 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
53 format_ikev2_trace (u8 * s, va_list * args)
55 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
57 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
59 s = format (s, "ikev2: sw_if_index %d, next index %d",
60 t->sw_if_index, t->next_index);
64 static vlib_node_registration_t ikev2_node;
66 #define foreach_ikev2_error \
67 _(PROCESSED, "IKEv2 packets processed") \
68 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
69 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
70 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
71 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
72 _(NOT_IKEV2, "Non IKEv2 packets received")
76 #define _(sym,str) IKEV2_ERROR_##sym,
82 static char *ikev2_error_strings[] = {
83 #define _(sym,string) string,
90 IKEV2_NEXT_IP4_LOOKUP,
91 IKEV2_NEXT_ERROR_DROP,
95 static ikev2_sa_transform_t *
96 ikev2_find_transform_data (ikev2_sa_transform_t * t)
98 ikev2_main_t *km = &ikev2_main;
99 ikev2_sa_transform_t *td;
101 vec_foreach (td, km->supported_transforms)
103 if (td->type != t->type)
106 if (td->transform_id != t->transform_id)
109 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
111 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
112 || t->attrs[1] != 14)
115 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
123 static ikev2_sa_proposal_t *
124 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
125 ikev2_protocol_id_t prot_id)
127 ikev2_sa_proposal_t *rv = 0;
128 ikev2_sa_proposal_t *proposal;
129 ikev2_sa_transform_t *transform, *new_t;
130 u8 mandatory_bitmap, optional_bitmap;
132 if (prot_id == IKEV2_PROTOCOL_IKE)
134 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
135 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
136 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
137 optional_bitmap = mandatory_bitmap;
139 else if (prot_id == IKEV2_PROTOCOL_ESP)
141 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
142 (1 << IKEV2_TRANSFORM_TYPE_ESN);
143 optional_bitmap = mandatory_bitmap |
144 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
146 else if (prot_id == IKEV2_PROTOCOL_AH)
148 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
149 (1 << IKEV2_TRANSFORM_TYPE_ESN);
150 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
155 vec_add2 (rv, proposal, 1);
157 vec_foreach (proposal, proposals)
160 if (proposal->protocol_id != prot_id)
163 vec_foreach (transform, proposal->transforms)
165 if ((1 << transform->type) & bitmap)
168 if (ikev2_find_transform_data (transform))
170 bitmap |= 1 << transform->type;
171 vec_add2 (rv->transforms, new_t, 1);
172 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
173 new_t->attrs = vec_dup (transform->attrs);
177 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
178 (bitmap & ~optional_bitmap) == 0)
180 rv->proposal_num = proposal->proposal_num;
181 rv->protocol_id = proposal->protocol_id;
182 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
187 vec_free (rv->transforms);
196 ikev2_sa_transform_t *
197 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
198 ikev2_transform_type_t type)
200 ikev2_sa_transform_t *t;
205 vec_foreach (t, p->transforms)
208 return ikev2_find_transform_data (t);
214 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
218 vec_foreach (c, sa->childs)
220 ikev2_sa_proposal_t *proposal =
221 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
222 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
230 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
232 ikev2_sa_proposal_t *p;
233 ikev2_sa_transform_t *t;
240 vec_foreach (t, p->transforms)
244 vec_free (p->transforms);
250 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
252 ikev2_sa_free_proposal_vector (&c->r_proposals);
253 ikev2_sa_free_proposal_vector (&c->i_proposals);
263 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
266 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
272 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
274 ikev2_sa_free_child_sa (child);
275 vec_del1 (sa->childs, child - sa->childs);
279 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
281 vec_free (sa->i_nonce);
282 vec_free (sa->i_dh_data);
283 vec_free (sa->dh_shared_key);
284 vec_free (sa->dh_private_key);
286 ikev2_sa_free_proposal_vector (&sa->r_proposals);
287 ikev2_sa_free_proposal_vector (&sa->i_proposals);
290 vec_free (sa->sk_ai);
291 vec_free (sa->sk_ar);
292 vec_free (sa->sk_ei);
293 vec_free (sa->sk_er);
294 vec_free (sa->sk_pi);
295 vec_free (sa->sk_pr);
297 vec_free (sa->i_id.data);
298 vec_free (sa->i_auth.data);
299 vec_free (sa->r_id.data);
300 vec_free (sa->r_auth.data);
302 EVP_PKEY_free (sa->r_auth.key);
306 ikev2_sa_free_all_child_sa (&sa->childs);
310 ikev2_delete_sa (ikev2_sa_t * sa)
312 ikev2_main_t *km = &ikev2_main;
313 u32 thread_index = vlib_get_thread_index ();
316 ikev2_sa_free_all_vec (sa);
318 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
321 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
322 pool_put (km->per_thread_data[thread_index].sas, sa);
327 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
329 ikev2_sa_transform_t *t = 0, *t2;
330 ikev2_main_t *km = &ikev2_main;
332 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
337 /* check if received DH group is on our list of supported groups */
338 vec_foreach (t2, km->supported_transforms)
340 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
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->tun_itf = sai->tun_itf;
396 sa->is_tun_itf_set = sai->is_tun_itf_set;
397 sa->i_id.data = _(sai->i_id.data);
398 sa->i_auth.method = sai->i_auth.method;
399 sa->i_auth.hex = sai->i_auth.hex;
400 sa->i_auth.data = _(sai->i_auth.data);
401 sa->i_auth.key = _(sai->i_auth.key);
402 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
403 sa->childs = _(sai->childs);
404 sa->udp_encap = sai->udp_encap;
405 sa->dst_port = sai->dst_port;
409 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
414 /* check if received DH group is on our list of supported groups */
415 vec_foreach (t2, km->supported_transforms)
417 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
426 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
431 /* generate dh keys */
432 ikev2_complete_dh (sa, t);
437 ikev2_calc_keys (ikev2_sa_t * sa)
440 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
443 u16 integ_key_len = 0;
444 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
446 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
448 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
450 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
453 integ_key_len = tr_integ->key_len;
455 vec_append (s, sa->i_nonce);
456 vec_append (s, sa->r_nonce);
457 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
459 /* Calculate S = Ni | Nr | SPIi | SPIr */
461 vec_add2 (s, tmp, 2 * sizeof (*spi));
463 spi[0] = clib_host_to_net_u64 (sa->ispi);
464 spi[1] = clib_host_to_net_u64 (sa->rspi);
466 /* calculate PRFplus */
468 int len = tr_prf->key_trunc + /* SK_d */
469 integ_key_len * 2 + /* SK_ai, SK_ar */
470 tr_encr->key_len * 2 + /* SK_ei, SK_er */
471 tr_prf->key_len * 2; /* SK_pi, SK_pr */
473 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
480 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
481 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
482 pos += tr_prf->key_trunc;
487 sa->sk_ai = vec_new (u8, integ_key_len);
488 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
489 pos += integ_key_len;
492 sa->sk_ar = vec_new (u8, integ_key_len);
493 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
494 pos += integ_key_len;
498 sa->sk_ei = vec_new (u8, tr_encr->key_len);
499 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
500 pos += tr_encr->key_len;
503 sa->sk_er = vec_new (u8, tr_encr->key_len);
504 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
505 pos += tr_encr->key_len;
508 sa->sk_pi = vec_new (u8, tr_prf->key_len);
509 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
510 pos += tr_prf->key_len;
513 sa->sk_pr = vec_new (u8, tr_prf->key_len);
514 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
515 pos += tr_prf->key_len;
521 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
524 u16 integ_key_len = 0;
527 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
529 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
531 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
533 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
536 integ_key_len = ctr_integ->key_len;
538 salt_len = sizeof (u32);
540 vec_append (s, sa->i_nonce);
541 vec_append (s, sa->r_nonce);
542 /* calculate PRFplus */
544 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
546 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
551 child->sk_ei = vec_new (u8, ctr_encr->key_len);
552 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
553 pos += ctr_encr->key_len;
558 child->sk_ai = vec_new (u8, ctr_integ->key_len);
559 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
560 pos += ctr_integ->key_len;
564 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
569 child->sk_er = vec_new (u8, ctr_encr->key_len);
570 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
571 pos += ctr_encr->key_len;
576 child->sk_ar = vec_new (u8, integ_key_len);
577 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
578 pos += integ_key_len;
582 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
592 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
596 u32 len = clib_net_to_host_u32 (ike->length);
597 u8 payload = ike->nextpayload;
599 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
601 clib_net_to_host_u64 (ike->ispi),
602 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
604 sa->ispi = clib_net_to_host_u64 (ike->ispi);
606 /* store whole IKE payload - needed for PSK auth */
607 vec_free (sa->last_sa_init_req_packet_data);
608 vec_add (sa->last_sa_init_req_packet_data, ike, len);
610 while (p < len && payload != IKEV2_PAYLOAD_NONE)
612 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
613 u32 plen = clib_net_to_host_u16 (ikep->length);
615 if (plen < sizeof (ike_payload_header_t))
618 if (payload == IKEV2_PAYLOAD_SA)
620 ikev2_sa_free_proposal_vector (&sa->i_proposals);
621 sa->i_proposals = ikev2_parse_sa_payload (ikep);
623 else if (payload == IKEV2_PAYLOAD_KE)
625 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
626 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
627 vec_free (sa->i_dh_data);
628 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
630 else if (payload == IKEV2_PAYLOAD_NONCE)
632 vec_free (sa->i_nonce);
633 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
635 else if (payload == IKEV2_PAYLOAD_NOTIFY)
637 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
640 else if (payload == IKEV2_PAYLOAD_VENDOR)
642 ikev2_parse_vendor_payload (ikep);
646 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
648 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
650 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
651 sa->unsupported_cp = payload;
656 payload = ikep->nextpayload;
660 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
664 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
668 u32 len = clib_net_to_host_u32 (ike->length);
669 u8 payload = ike->nextpayload;
671 sa->ispi = clib_net_to_host_u64 (ike->ispi);
672 sa->rspi = clib_net_to_host_u64 (ike->rspi);
674 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
675 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
678 /* store whole IKE payload - needed for PSK auth */
679 vec_free (sa->last_sa_init_res_packet_data);
680 vec_add (sa->last_sa_init_res_packet_data, ike, len);
682 while (p < len && payload != IKEV2_PAYLOAD_NONE)
684 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
685 u32 plen = clib_net_to_host_u16 (ikep->length);
687 if (plen < sizeof (ike_payload_header_t))
690 if (payload == IKEV2_PAYLOAD_SA)
692 ikev2_sa_free_proposal_vector (&sa->r_proposals);
693 sa->r_proposals = ikev2_parse_sa_payload (ikep);
696 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
698 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
701 else if (payload == IKEV2_PAYLOAD_KE)
703 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
704 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
705 vec_free (sa->r_dh_data);
706 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
708 else if (payload == IKEV2_PAYLOAD_NONCE)
710 vec_free (sa->r_nonce);
711 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
713 else if (payload == IKEV2_PAYLOAD_NOTIFY)
715 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
718 else if (payload == IKEV2_PAYLOAD_VENDOR)
720 ikev2_parse_vendor_payload (ikep);
724 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
726 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
728 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
729 sa->unsupported_cp = payload;
734 payload = ikep->nextpayload;
740 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
745 u32 len = clib_net_to_host_u32 (ike->length);
746 ike_payload_header_t *ikep = 0;
748 ikev2_sa_transform_t *tr_integ;
750 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
753 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
755 ikep = (ike_payload_header_t *) & ike->payload[p];
756 plen = clib_net_to_host_u16 (ikep->length);
758 if (plen < sizeof (*ikep))
761 if (*payload == IKEV2_PAYLOAD_SK)
763 last_payload = *payload;
767 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
769 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
771 sa->unsupported_cp = *payload;
776 *payload = ikep->nextpayload;
780 if (last_payload != IKEV2_PAYLOAD_SK)
782 ikev2_elog_error ("Last payload must be SK");
787 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
788 (u8 *) ike, len - tr_integ->key_trunc);
790 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
792 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
794 ikev2_elog_error ("message integrity check failed");
800 return ikev2_decrypt_data (sa, ikep->payload, plen);
804 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
806 ikev2_main_t *km = &ikev2_main;
810 u32 thread_index = vlib_get_thread_index ();
812 if (!sa->initial_contact)
815 /* find old IKE SAs with the same authenticated identity */
817 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
818 if (tmp->i_id.type != sa->i_id.type ||
819 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
820 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
823 if (sa->rspi != tmp->rspi)
824 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
828 for (i = 0; i < vec_len (delete); i++)
831 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
833 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
835 ikev2_delete_sa (tmp);
839 sa->initial_contact = 0;
843 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
845 ikev2_child_sa_t *first_child_sa;
847 u8 payload = ike->nextpayload;
849 ike_payload_header_t *ikep;
852 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
853 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
854 clib_host_to_net_u64 (ike->rspi),
855 sa->is_initiator ? sa->raddr.as_u32 : sa->
858 ikev2_calc_keys (sa);
860 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
864 if (sa->unsupported_cp)
865 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
866 goto cleanup_and_exit;
869 /* select or create 1st child SA */
870 if (sa->is_initiator)
872 first_child_sa = &sa->childs[0];
876 ikev2_sa_free_all_child_sa (&sa->childs);
877 vec_add2 (sa->childs, first_child_sa, 1);
881 /* process encrypted payload */
883 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
885 ikep = (ike_payload_header_t *) & plaintext[p];
886 plen = clib_net_to_host_u16 (ikep->length);
888 if (plen < sizeof (ike_payload_header_t))
889 goto cleanup_and_exit;
891 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
893 if (sa->is_initiator)
895 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
896 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
900 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
901 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
904 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
906 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
908 sa->i_id.type = id->id_type;
909 vec_free (sa->i_id.data);
910 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
912 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
914 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
916 sa->r_id.type = id->id_type;
917 vec_free (sa->r_id.data);
918 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
920 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
922 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
924 if (sa->is_initiator)
926 sa->r_auth.method = a->auth_method;
927 vec_free (sa->r_auth.data);
928 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
932 sa->i_auth.method = a->auth_method;
933 vec_free (sa->i_auth.data);
934 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
937 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
939 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
940 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
942 sa->initial_contact = 1;
946 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
948 ikev2_parse_vendor_payload (ikep);
950 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
952 vec_free (first_child_sa->tsi);
953 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
955 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
957 vec_free (first_child_sa->tsr);
958 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
962 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
965 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
967 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
968 sa->unsupported_cp = payload;
973 payload = ikep->nextpayload;
978 vec_free (plaintext);
982 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
986 u8 payload = ike->nextpayload;
988 ike_payload_header_t *ikep;
991 sa->liveness_retries = 0;
992 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
993 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
994 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
996 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
999 goto cleanup_and_exit;
1001 /* process encrypted payload */
1003 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1005 ikep = (ike_payload_header_t *) & plaintext[p];
1006 plen = clib_net_to_host_u16 (ikep->length);
1008 if (plen < sizeof (ike_payload_header_t))
1009 goto cleanup_and_exit;
1011 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1013 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1014 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1015 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1018 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1020 sa->del = ikev2_parse_delete_payload (ikep);
1022 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1024 ikev2_parse_vendor_payload (ikep);
1028 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1030 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1032 sa->unsupported_cp = payload;
1037 payload = ikep->nextpayload;
1042 vec_free (plaintext);
1046 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1050 u8 payload = ike->nextpayload;
1053 u8 nonce[IKEV2_NONCE_SIZE];
1055 ike_payload_header_t *ikep;
1057 ikev2_notify_t *n = 0;
1058 ikev2_ts_t *tsi = 0;
1059 ikev2_ts_t *tsr = 0;
1060 ikev2_sa_proposal_t *proposal = 0;
1061 ikev2_child_sa_t *child_sa;
1063 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1064 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1065 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1067 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1070 goto cleanup_and_exit;
1072 /* process encrypted payload */
1074 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1076 ikep = (ike_payload_header_t *) & plaintext[p];
1077 plen = clib_net_to_host_u16 (ikep->length);
1079 if (plen < sizeof (ike_payload_header_t))
1080 goto cleanup_and_exit;
1082 else if (payload == IKEV2_PAYLOAD_SA)
1084 proposal = ikev2_parse_sa_payload (ikep);
1086 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1088 n = ikev2_parse_notify_payload (ikep);
1089 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1094 else if (payload == IKEV2_PAYLOAD_DELETE)
1096 sa->del = ikev2_parse_delete_payload (ikep);
1098 else if (payload == IKEV2_PAYLOAD_VENDOR)
1100 ikev2_parse_vendor_payload (ikep);
1102 else if (payload == IKEV2_PAYLOAD_NONCE)
1104 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1106 else if (payload == IKEV2_PAYLOAD_TSI)
1108 tsi = ikev2_parse_ts_payload (ikep);
1110 else if (payload == IKEV2_PAYLOAD_TSR)
1112 tsr = ikev2_parse_ts_payload (ikep);
1116 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1118 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1120 sa->unsupported_cp = payload;
1125 payload = ikep->nextpayload;
1129 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1131 ikev2_rekey_t *rekey = &sa->rekey[0];
1132 rekey->protocol_id = proposal->protocol_id;
1134 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1135 rekey->i_proposal->spi = rekey->spi;
1136 rekey->r_proposal = proposal;
1140 vec_free (sa->r_nonce);
1141 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1142 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1145 child_sa->rekey_retries = 0;
1150 ikev2_rekey_t *rekey;
1151 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1154 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1156 goto cleanup_and_exit;
1158 vec_add2 (sa->rekey, rekey, 1);
1159 rekey->protocol_id = n->protocol_id;
1160 rekey->spi = n->spi;
1161 rekey->i_proposal = proposal;
1163 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1167 vec_free (sa->i_nonce);
1168 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1169 /* generate new Nr */
1170 vec_free (sa->r_nonce);
1171 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1172 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1176 vec_free (plaintext);
1181 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1189 ikev2_sa_transform_t *tr_prf;
1192 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1198 nonce = sa->i_nonce;
1199 packet_data = sa->last_sa_init_res_packet_data;
1205 nonce = sa->r_nonce;
1206 packet_data = sa->last_sa_init_req_packet_data;
1209 data = vec_new (u8, 4);
1211 vec_append (data, id->data);
1213 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1214 vec_append (authmsg, packet_data);
1215 vec_append (authmsg, nonce);
1216 vec_append (authmsg, id_hash);
1224 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1226 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1227 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1228 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1229 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1236 ikev2_sa_match_ts (ikev2_sa_t * sa)
1238 ikev2_main_t *km = &ikev2_main;
1240 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1244 pool_foreach (p, km->profiles, ({
1246 if (sa->is_initiator)
1260 if (p->rem_id.type != id->type ||
1261 vec_len(p->rem_id.data) != vec_len(id->data) ||
1262 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1265 vec_foreach(ts, sa->childs[0].tsi)
1267 if (ikev2_ts_cmp(p_tsi, ts))
1269 vec_add1 (tsi, ts[0]);
1274 vec_foreach(ts, sa->childs[0].tsr)
1276 if (ikev2_ts_cmp(p_tsr, ts))
1278 vec_add1 (tsr, ts[0]);
1289 vec_free (sa->childs[0].tsi);
1290 vec_free (sa->childs[0].tsr);
1291 sa->childs[0].tsi = tsi;
1292 sa->childs[0].tsr = tsr;
1298 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1303 ikev2_sa_auth (ikev2_sa_t * sa)
1305 ikev2_main_t *km = &ikev2_main;
1306 ikev2_profile_t *p, *sel_p = 0;
1307 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1308 ikev2_sa_transform_t *tr_prf;
1311 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1313 /* only shared key and rsa signature */
1314 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1315 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1317 ikev2_elog_uint (IKEV2_LOG_ERROR,
1318 "unsupported authentication method %u",
1320 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1324 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1325 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1328 ikev2_auth_t *sa_auth;
1330 if (sa->is_initiator)
1333 sa_auth = &sa->r_auth;
1338 sa_auth = &sa->i_auth;
1342 pool_foreach (p, km->profiles, ({
1345 if (p->rem_id.type != sa_id->type ||
1346 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1347 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1350 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1352 if (!p->auth.data ||
1353 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1356 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1357 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1359 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1361 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1368 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1370 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1373 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1375 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1388 sa->udp_encap = sel_p->udp_encap;
1389 sa->dst_port = sel_p->dst_port;
1393 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1395 if (!sa->is_initiator)
1397 vec_free (sa->r_id.data);
1398 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1399 sa->r_id.type = sel_p->loc_id.type;
1401 /* generate our auth data */
1402 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1403 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1405 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1406 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1408 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1410 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1411 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1415 /* select transforms for 1st child sa */
1416 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1417 sa->childs[0].r_proposals =
1418 ikev2_select_proposal (sa->childs[0].i_proposals,
1419 IKEV2_PROTOCOL_ESP);
1421 if (~0 != sel_p->tun_itf)
1423 sa->is_tun_itf_set = 1;
1424 sa->tun_itf = sel_p->tun_itf;
1430 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1431 "profile found! ispi %lx", sa->ispi);
1432 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1440 ikev2_sa_auth_init (ikev2_sa_t * sa)
1442 ikev2_main_t *km = &ikev2_main;
1443 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1444 ikev2_sa_transform_t *tr_prf;
1447 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1449 /* only shared key and rsa signature */
1450 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1451 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1453 ikev2_elog_uint (IKEV2_LOG_ERROR,
1454 "unsupported authentication method %u",
1456 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1460 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1461 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1462 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1463 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1466 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1468 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1469 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1471 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1473 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1474 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1484 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1486 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1490 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1492 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1502 ipsec_sa_flags_t flags;
1505 ipsec_crypto_alg_t encr_type;
1506 ipsec_integ_alg_t integ_type;
1507 ip46_address_t local_ip;
1508 ip46_address_t remote_ip;
1509 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1511 u32 old_remote_sa_id;
1513 } ikev2_add_ipsec_tunnel_args_t;
1516 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1518 ikev2_main_t *km = &ikev2_main;
1522 if (~0 == a->sw_if_index)
1524 /* no tunnel associated with the SA/profile - create a new one */
1525 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1526 &a->local_ip, &a->remote_ip, 0,
1527 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1528 TUNNEL_MODE_P2P, &sw_if_index);
1530 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1532 if (hash_get (km->sw_if_indices, sw_if_index))
1533 /* interface is managed by IKE; proceed with updating SAs */
1536 hash_set1 (km->sw_if_indices, sw_if_index);
1540 sw_if_index = a->sw_if_index;
1541 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1546 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1547 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1548 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1553 vec_add1 (sas_in, a->remote_sa_id);
1556 ipsec_tun_protect_del (sw_if_index, NULL);
1558 /* replace local SA immediately */
1559 ipsec_sa_unlock_id (a->local_sa_id);
1561 /* keep the old sa */
1562 vec_add1 (sas_in, a->old_remote_sa_id);
1565 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1567 IPSEC_PROTOCOL_ESP, a->encr_type,
1568 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1569 a->flags, 0, a->salt_local, &a->local_ip,
1570 &a->remote_ip, NULL, a->dst_port);
1571 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1572 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1573 a->integ_type, &a->rem_ikey,
1574 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1575 a->salt_remote, &a->remote_ip,
1576 &a->local_ip, NULL, a->dst_port);
1578 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1582 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1585 ikev2_child_sa_t * child, u32 sa_index,
1586 u32 child_index, u8 is_rekey)
1588 ikev2_main_t *km = &ikev2_main;
1589 ipsec_crypto_alg_t encr_type;
1590 ipsec_integ_alg_t integ_type;
1591 ikev2_profile_t *p = 0;
1592 ikev2_sa_transform_t *tr;
1593 ikev2_sa_proposal_t *proposals;
1595 ikev2_add_ipsec_tunnel_args_t a;
1597 clib_memset (&a, 0, sizeof (a));
1599 if (!child->r_proposals)
1601 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1605 if (sa->is_initiator)
1607 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1608 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1609 proposals = child->i_proposals;
1610 a.local_spi = child->r_proposals[0].spi;
1611 a.remote_spi = child->i_proposals[0].spi;
1615 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1616 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1617 proposals = child->r_proposals;
1618 a.local_spi = child->i_proposals[0].spi;
1619 a.remote_spi = child->r_proposals[0].spi;
1622 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1625 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1626 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1628 a.is_rekey = is_rekey;
1630 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1631 if (tr && tr->esn_type)
1632 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1634 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1637 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1639 switch (tr->key_len)
1642 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1645 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1648 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1651 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1656 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1659 switch (tr->key_len)
1662 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1665 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1668 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1671 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1679 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1685 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1688 a.encr_type = encr_type;
1692 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1695 switch (tr->integ_type)
1697 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1698 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1700 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1701 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1703 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1704 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1706 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1707 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1710 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1716 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1722 integ_type = IPSEC_INTEG_ALG_NONE;
1725 a.integ_type = integ_type;
1726 ikev2_calc_child_keys (sa, child);
1728 if (sa->is_initiator)
1730 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1731 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1732 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1733 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1736 a.salt_remote = child->salt_er;
1737 a.salt_local = child->salt_ei;
1742 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1743 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1744 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1745 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1748 a.salt_remote = child->salt_ei;
1749 a.salt_local = child->salt_er;
1753 if (sa->is_profile_index_set)
1754 p = pool_elt_at_index (km->profiles, sa->profile_index);
1756 if (p && p->lifetime)
1758 child->time_to_expiration =
1759 vlib_time_now (vnm->vlib_main) + p->lifetime;
1760 if (p->lifetime_jitter)
1762 // This is not much better than rand(3), which Coverity warns
1763 // is unsuitable for security applications; random_u32 is
1764 // however fast. If this perturbance to the expiration time
1765 // needs to use a better RNG then we may need to use something
1766 // like /dev/urandom which has significant overhead.
1767 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1768 rnd = random_u32 (&rnd);
1770 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1774 if (thread_index & 0xffffffc0)
1775 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1777 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1778 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1780 child->local_sa_id =
1782 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1784 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1789 /* create a new remote SA ID to keep the old SA for a bit longer
1790 * so the peer has some time to swap their SAs */
1792 /* use most significat bit of child index part in id */
1794 if (sa->current_remote_id_mask)
1796 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1797 sa->current_remote_id_mask = 0;
1801 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1802 sa->current_remote_id_mask = mask;
1803 remote_sa_id |= mask;
1805 sa->old_id_expiration = 3.0;
1806 sa->old_remote_id_present = 1;
1809 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1811 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1812 a.dst_port = sa->dst_port;
1814 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1815 (u8 *) & a, sizeof (a));
1821 ip46_address_t local_ip;
1822 ip46_address_t remote_ip;
1826 } ikev2_del_ipsec_tunnel_args_t;
1828 static_always_inline u32
1829 ikev2_flip_alternate_sa_bit (u32 id)
1838 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1840 ikev2_main_t *km = &ikev2_main;
1841 ipip_tunnel_t *ipip = NULL;
1844 if (~0 == a->sw_if_index)
1847 ipip_tunnel_key_t key = {
1849 .dst = a->remote_ip,
1850 .transport = IPIP_TRANSPORT_IP4,
1855 ipip = ipip_tunnel_db_find (&key);
1859 sw_if_index = ipip->sw_if_index;
1860 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1867 sw_if_index = a->sw_if_index;
1868 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1871 if (~0 != sw_if_index)
1872 ipsec_tun_protect_del (sw_if_index, NULL);
1874 ipsec_sa_unlock_id (a->remote_sa_id);
1875 ipsec_sa_unlock_id (a->local_sa_id);
1876 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
1879 ipip_del_tunnel (ipip->sw_if_index);
1883 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1884 ikev2_child_sa_t * child)
1886 ikev2_del_ipsec_tunnel_args_t a;
1888 clib_memset (&a, 0, sizeof (a));
1890 if (sa->is_initiator)
1892 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1893 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1897 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1898 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1901 a.remote_sa_id = child->remote_sa_id;
1902 a.local_sa_id = child->local_sa_id;
1903 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1905 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1911 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1914 ike_payload_header_t *ph;
1918 ikev2_sa_transform_t *tr_encr, *tr_integ;
1920 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1922 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1924 ikev2_payload_chain_t *chain = 0;
1925 ikev2_payload_new_chain (chain);
1927 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1929 if (sa->r_proposals == 0)
1931 ikev2_payload_add_notify (chain,
1932 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1933 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1935 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1937 u8 *data = vec_new (u8, 2);
1938 ikev2_sa_transform_t *tr_dh;
1940 ikev2_sa_get_td_for_type (sa->r_proposals,
1941 IKEV2_TRANSFORM_TYPE_DH);
1942 ASSERT (tr_dh && tr_dh->dh_type);
1944 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1945 data[1] = (tr_dh->dh_type) & 0xff;
1947 ikev2_payload_add_notify (chain,
1948 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1951 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1953 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1955 u8 *data = vec_new (u8, 1);
1957 data[0] = sa->unsupported_cp;
1958 ikev2_payload_add_notify (chain,
1959 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1965 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1966 ikev2_payload_add_sa (chain, sa->r_proposals);
1967 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1968 ikev2_payload_add_nonce (chain, sa->r_nonce);
1971 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1973 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1975 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1976 ikev2_payload_add_auth (chain, &sa->r_auth);
1977 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1978 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1979 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1981 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1983 ikev2_payload_add_notify (chain,
1984 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1986 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1988 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1990 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1992 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1993 ikev2_payload_add_auth (chain, &sa->r_auth);
1995 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1997 ikev2_payload_add_notify (chain,
1998 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1999 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2000 ikev2_payload_add_auth (chain, &sa->r_auth);
2001 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2002 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2004 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2006 u8 *data = vec_new (u8, 1);
2008 data[0] = sa->unsupported_cp;
2009 ikev2_payload_add_notify (chain,
2010 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2014 else if (sa->state == IKEV2_STATE_SA_INIT)
2016 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2017 ikev2_payload_add_auth (chain, &sa->i_auth);
2018 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2019 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2020 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2021 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2026 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2030 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2032 /* if pending delete */
2035 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2037 if (sa->is_initiator)
2038 ikev2_payload_add_delete (chain, sa->del);
2040 /* The response to a request that deletes the IKE SA is an empty
2041 INFORMATIONAL response. */
2042 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2044 /* The response to a request that deletes ESP or AH SAs will contain
2045 delete payloads for the paired SAs going in the other direction. */
2048 ikev2_payload_add_delete (chain, sa->del);
2053 /* received N(AUTHENTICATION_FAILED) */
2054 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2056 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2059 /* received unsupported critical payload */
2060 else if (sa->unsupported_cp)
2062 u8 *data = vec_new (u8, 1);
2064 data[0] = sa->unsupported_cp;
2065 ikev2_payload_add_notify (chain,
2066 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2069 sa->unsupported_cp = 0;
2071 /* else send empty response */
2073 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2075 if (sa->is_initiator)
2078 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2079 ikev2_notify_t notify;
2080 u8 *data = vec_new (u8, 4);
2081 clib_memset (¬ify, 0, sizeof (notify));
2082 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2083 notify.spi = sa->childs[0].i_proposals->spi;
2084 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2086 ikev2_payload_add_sa (chain, proposals);
2087 ikev2_payload_add_nonce (chain, sa->i_nonce);
2088 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2089 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2090 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2099 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2100 ikev2_payload_add_nonce (chain, sa->r_nonce);
2101 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2103 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2105 vec_del1 (sa->rekey, 0);
2107 else if (sa->unsupported_cp)
2109 u8 *data = vec_new (u8, 1);
2111 data[0] = sa->unsupported_cp;
2112 ikev2_payload_add_notify (chain,
2113 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2116 sa->unsupported_cp = 0;
2120 ikev2_payload_add_notify (chain,
2121 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2128 ike->version = IKE_VERSION_2;
2129 ike->nextpayload = IKEV2_PAYLOAD_SK;
2130 tlen = sizeof (*ike);
2131 if (sa->is_initiator)
2133 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2134 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2138 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2142 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2144 tlen += vec_len (chain->data);
2145 ike->nextpayload = chain->first_payload_type;
2146 ike->length = clib_host_to_net_u32 (tlen);
2147 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2149 /* store whole IKE payload - needed for PSK auth */
2150 vec_free (sa->last_sa_init_res_packet_data);
2151 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2156 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2159 plen = sizeof (*ph);
2160 ph = (ike_payload_header_t *) & ike->payload[0];
2161 ph->nextpayload = chain->first_payload_type;
2163 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2166 /* add space for hmac */
2167 plen += tr_integ->key_trunc;
2170 /* payload and total length */
2171 ph->length = clib_host_to_net_u16 (plen);
2172 ike->length = clib_host_to_net_u32 (tlen);
2174 /* calc integrity data for whole packet except hash itself */
2176 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2177 (u8 *) ike, tlen - tr_integ->key_trunc);
2179 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2180 sizeof (*ike), integ, tr_integ->key_trunc);
2182 /* store whole IKE payload - needed for retransmit */
2183 vec_free (sa->last_res_packet_data);
2184 vec_add (sa->last_res_packet_data, ike, tlen);
2188 ikev2_payload_destroy_chain (chain);
2194 ikev2_retransmit_sa_init (ike_header_t * ike,
2195 ip4_address_t iaddr, ip4_address_t raddr)
2197 ikev2_main_t *km = &ikev2_main;
2199 u32 thread_index = vlib_get_thread_index ();
2202 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2203 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2204 sa->iaddr.as_u32 == iaddr.as_u32 &&
2205 sa->raddr.as_u32 == raddr.as_u32)
2208 u32 len = clib_net_to_host_u32(ike->length);
2209 u8 payload = ike->nextpayload;
2211 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2212 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2213 u32 plen = clib_net_to_host_u16(ikep->length);
2215 if (plen < sizeof(ike_payload_header_t))
2218 if (payload == IKEV2_PAYLOAD_NONCE)
2220 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2222 /* req is retransmit */
2223 if (sa->state == IKEV2_STATE_SA_INIT)
2226 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2227 ike->ispi = tmp->ispi;
2228 ike->rspi = tmp->rspi;
2229 ike->nextpayload = tmp->nextpayload;
2230 ike->version = tmp->version;
2231 ike->exchange = tmp->exchange;
2232 ike->flags = tmp->flags;
2233 ike->msgid = tmp->msgid;
2234 ike->length = tmp->length;
2235 clib_memcpy_fast(ike->payload, tmp->payload,
2236 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2237 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2238 "ispi %lx IKE_SA_INIT retransmit "
2239 "from %d.%d.%d.%d to %d.%d.%d.%d",
2241 raddr.as_u32, iaddr.as_u32);
2244 /* else ignore req */
2247 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2248 "ispi %lx IKE_SA_INIT ignore "
2249 "from %d.%d.%d.%d to %d.%d.%d.%d",
2251 raddr.as_u32, iaddr.as_u32);
2256 payload = ikep->nextpayload;
2263 /* req is not retransmit */
2268 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2270 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2273 if (msg_id > sa->last_msg_id)
2275 sa->last_msg_id = msg_id;
2278 /* retransmitted req */
2279 else if (msg_id == sa->last_msg_id)
2282 tmp = (ike_header_t *) sa->last_res_packet_data;
2283 ike->ispi = tmp->ispi;
2284 ike->rspi = tmp->rspi;
2285 ike->nextpayload = tmp->nextpayload;
2286 ike->version = tmp->version;
2287 ike->exchange = tmp->exchange;
2288 ike->flags = tmp->flags;
2289 ike->msgid = tmp->msgid;
2290 ike->length = tmp->length;
2291 clib_memcpy_fast (ike->payload, tmp->payload,
2292 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2293 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2294 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2297 /* old req ignore */
2300 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2301 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2307 ikev2_init_sa (ikev2_sa_t * sa)
2309 ikev2_main_t *km = &ikev2_main;
2310 sa->liveness_period_check =
2311 vlib_time_now (km->vlib_main) + IKEV2_LIVENESS_PERIOD_CHECK;
2315 ikev2_node_fn (vlib_main_t * vm,
2316 vlib_node_runtime_t * node, vlib_frame_t * frame)
2318 u32 n_left_from, *from, *to_next;
2319 ikev2_next_t next_index;
2320 ikev2_main_t *km = &ikev2_main;
2321 u32 thread_index = vlib_get_thread_index ();
2323 from = vlib_frame_vector_args (frame);
2324 n_left_from = frame->n_vectors;
2325 next_index = node->cached_next_index;
2327 while (n_left_from > 0)
2331 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2333 while (n_left_from > 0 && n_left_to_next > 0)
2337 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2342 ikev2_sa_t *sa0 = 0;
2343 ikev2_sa_t sa; /* temporary store for SA */
2347 /* speculatively enqueue b0 to the current next frame */
2353 n_left_to_next -= 1;
2355 b0 = vlib_get_buffer (vm, bi0);
2356 ike0 = vlib_buffer_get_current (b0);
2357 vlib_buffer_advance (b0, -sizeof (*udp0));
2358 udp0 = vlib_buffer_get_current (b0);
2359 vlib_buffer_advance (b0, -sizeof (*ip40));
2360 ip40 = vlib_buffer_get_current (b0);
2362 if (ike0->version != IKE_VERSION_2)
2364 vlib_node_increment_counter (vm, ikev2_node.index,
2365 IKEV2_ERROR_NOT_IKEV2, 1);
2369 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2372 clib_memset (sa0, 0, sizeof (*sa0));
2374 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2376 if (ike0->rspi == 0)
2378 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2379 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2381 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2385 vlib_node_increment_counter (vm, ikev2_node.index,
2386 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2388 len = clib_net_to_host_u32 (ike0->length);
2393 vlib_node_increment_counter (vm, ikev2_node.index,
2394 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2399 ikev2_process_sa_init_req (vm, sa0, ike0);
2401 if (sa0->state == IKEV2_STATE_SA_INIT)
2403 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2405 ikev2_select_proposal (sa0->i_proposals,
2406 IKEV2_PROTOCOL_IKE);
2407 ikev2_generate_sa_init_data (sa0);
2410 if (sa0->state == IKEV2_STATE_SA_INIT
2411 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2413 len = ikev2_generate_message (sa0, ike0, 0);
2416 if (sa0->state == IKEV2_STATE_SA_INIT)
2418 /* add SA to the pool */
2419 pool_get (km->per_thread_data[thread_index].sas,
2421 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2422 ikev2_init_sa (sa0);
2424 per_thread_data[thread_index].sa_by_rspi,
2427 km->per_thread_data[thread_index].sas);
2431 ikev2_sa_free_all_vec (sa0);
2435 else //received sa_init without initiator flag
2437 ikev2_process_sa_init_resp (vm, sa0, ike0);
2439 if (sa0->state == IKEV2_STATE_SA_INIT)
2441 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2442 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2446 pool_elt_at_index (km->sais, p[0]);
2448 ikev2_complete_sa_data (sa0, sai);
2449 ikev2_calc_keys (sa0);
2450 ikev2_sa_auth_init (sa0);
2451 len = ikev2_generate_message (sa0, ike0, 0);
2455 if (sa0->state == IKEV2_STATE_SA_INIT)
2457 /* add SA to the pool */
2458 pool_get (km->per_thread_data[thread_index].sas, sa0);
2459 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2460 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2462 sa0 - km->per_thread_data[thread_index].sas);
2466 ikev2_sa_free_all_vec (sa0);
2470 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2473 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2474 clib_net_to_host_u64 (ike0->rspi));
2478 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2481 r = ikev2_retransmit_resp (sa0, ike0);
2484 vlib_node_increment_counter (vm, ikev2_node.index,
2485 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2487 len = clib_net_to_host_u32 (ike0->length);
2492 vlib_node_increment_counter (vm, ikev2_node.index,
2493 IKEV2_ERROR_IKE_REQ_IGNORE,
2498 ikev2_process_auth_req (vm, sa0, ike0);
2499 ikev2_sa_auth (sa0);
2500 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2502 ikev2_initial_contact_cleanup (sa0);
2503 ikev2_sa_match_ts (sa0);
2504 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2505 ikev2_create_tunnel_interface (km->vnet_main,
2511 if (sa0->is_initiator)
2513 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2517 pool_elt_at_index (km->sais, p[0]);
2518 hash_unset (km->sa_by_ispi, sai->ispi);
2519 ikev2_sa_free_all_vec (sai);
2520 pool_put (km->sais, sai);
2525 len = ikev2_generate_message (sa0, ike0, 0);
2529 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2532 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2533 clib_net_to_host_u64 (ike0->rspi));
2537 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2540 r = ikev2_retransmit_resp (sa0, ike0);
2543 vlib_node_increment_counter (vm, ikev2_node.index,
2544 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2546 len = clib_net_to_host_u32 (ike0->length);
2551 vlib_node_increment_counter (vm, ikev2_node.index,
2552 IKEV2_ERROR_IKE_REQ_IGNORE,
2557 ikev2_process_informational_req (vm, sa0, ike0);
2560 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2562 ikev2_delete_t *d, *tmp, *resp = 0;
2563 vec_foreach (d, sa0->del)
2565 ikev2_child_sa_t *ch_sa;
2566 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2568 !sa0->is_initiator);
2571 ikev2_delete_tunnel_interface (km->vnet_main,
2573 if (!sa0->is_initiator)
2575 vec_add2 (resp, tmp, 1);
2576 tmp->protocol_id = d->protocol_id;
2577 tmp->spi = ch_sa->r_proposals[0].spi;
2579 ikev2_sa_del_child_sa (sa0, ch_sa);
2582 if (!sa0->is_initiator)
2584 vec_free (sa0->del);
2589 len = ikev2_generate_message (sa0, ike0, 0);
2592 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2595 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2596 clib_net_to_host_u64 (ike0->rspi));
2600 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2603 r = ikev2_retransmit_resp (sa0, ike0);
2606 vlib_node_increment_counter (vm, ikev2_node.index,
2607 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2609 len = clib_net_to_host_u32 (ike0->length);
2614 vlib_node_increment_counter (vm, ikev2_node.index,
2615 IKEV2_ERROR_IKE_REQ_IGNORE,
2620 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2623 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2626 vec_free (sa0->childs);
2627 ikev2_child_sa_t *child;
2628 vec_add2 (sa0->childs, child, 1);
2629 child->r_proposals = sa0->rekey[0].r_proposal;
2630 child->i_proposals = sa0->rekey[0].i_proposal;
2631 child->tsi = sa0->rekey[0].tsi;
2632 child->tsr = sa0->rekey[0].tsr;
2633 ikev2_create_tunnel_interface (km->vnet_main,
2636 child - sa0->childs,
2639 if (sa0->is_initiator)
2641 vec_del1 (sa0->rekey, 0);
2645 len = ikev2_generate_message (sa0, ike0, 0);
2652 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2653 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2655 ip40->src_address.as_u32,
2656 ip40->dst_address.as_u32);
2660 /* if we are sending packet back, rewrite headers */
2663 next0 = IKEV2_NEXT_IP4_LOOKUP;
2664 if (sa0->is_initiator)
2666 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2667 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2671 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2672 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2675 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2677 b0->current_length =
2678 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2679 ip40->length = clib_host_to_net_u16 (b0->current_length);
2680 ip40->checksum = ip4_header_checksum (ip40);
2683 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2684 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2686 ikev2_child_sa_t *c;
2688 vec_foreach (c, sa0->childs)
2689 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2691 ikev2_delete_sa (sa0);
2693 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2695 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2696 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2698 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2699 t->sw_if_index = sw_if_index0;
2700 t->next_index = next0;
2703 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2704 n_left_to_next, bi0, next0);
2707 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2710 vlib_node_increment_counter (vm, ikev2_node.index,
2711 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2712 return frame->n_vectors;
2716 VLIB_REGISTER_NODE (ikev2_node,static) = {
2717 .function = ikev2_node_fn,
2719 .vector_size = sizeof (u32),
2720 .format_trace = format_ikev2_trace,
2721 .type = VLIB_NODE_TYPE_INTERNAL,
2723 .n_errors = ARRAY_LEN(ikev2_error_strings),
2724 .error_strings = ikev2_error_strings,
2726 .n_next_nodes = IKEV2_N_NEXT,
2729 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2730 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2735 // set ikev2 proposals when vpp is used as initiator
2736 static clib_error_t *
2737 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2738 ikev2_transforms_set * ts,
2739 ikev2_sa_proposal_t ** proposals, int is_ike)
2742 ikev2_main_t *km = &ikev2_main;
2743 ikev2_sa_proposal_t *proposal;
2744 vec_add2 (*proposals, proposal, 1);
2745 ikev2_sa_transform_t *td;
2750 vec_foreach (td, km->supported_transforms)
2752 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2753 && td->encr_type == ts->crypto_alg
2754 && td->key_len == ts->crypto_key_size / 8)
2757 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2758 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2759 vec_add (td->attrs, (u8 *) attr, 4);
2760 vec_add1 (proposal->transforms, *td);
2769 r = clib_error_return (0, "Unsupported algorithm");
2773 if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2777 vec_foreach (td, km->supported_transforms)
2779 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2780 && td->integ_type == ts->integ_alg)
2782 vec_add1 (proposal->transforms, *td);
2790 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2791 r = clib_error_return (0, "Unsupported algorithm");
2800 vec_foreach (td, km->supported_transforms)
2802 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2803 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2805 vec_add1 (proposal->transforms, *td);
2812 r = clib_error_return (0, "Unsupported algorithm");
2818 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2821 vec_foreach (td, km->supported_transforms)
2823 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2825 vec_add1 (proposal->transforms, *td);
2828 sa->dh_group = td->dh_type;
2836 r = clib_error_return (0, "Unsupported algorithm");
2844 vec_foreach (td, km->supported_transforms)
2846 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2848 vec_add1 (proposal->transforms, *td);
2855 r = clib_error_return (0, "Unsupported algorithm");
2864 static ikev2_profile_t *
2865 ikev2_profile_index_by_name (u8 * name)
2867 ikev2_main_t *km = &ikev2_main;
2870 p = mhash_get (&km->profile_index_by_name, name);
2874 return pool_elt_at_index (km->profiles, p[0]);
2879 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2888 b0 = vlib_get_buffer (vm, bi0);
2889 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2890 udp0 = vlib_buffer_get_current (b0);
2891 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2892 ip40 = vlib_buffer_get_current (b0);
2895 ip40->ip_version_and_header_length = 0x45;
2897 ip40->fragment_id = 0;
2898 ip40->flags_and_fragment_offset = 0;
2900 ip40->protocol = IP_PROTOCOL_UDP;
2901 ip40->dst_address.as_u32 = dst->as_u32;
2902 ip40->src_address.as_u32 = src->as_u32;
2903 udp0->dst_port = clib_host_to_net_u16 (500);
2904 udp0->src_port = clib_host_to_net_u16 (500);
2905 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2907 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2908 ip40->length = clib_host_to_net_u16 (b0->current_length);
2909 ip40->checksum = ip4_header_checksum (ip40);
2912 /* send the request */
2913 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2914 to_next = vlib_frame_vector_args (f);
2917 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2922 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2925 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2930 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2931 *ike = vlib_buffer_get_current (b0);
2936 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2938 ikev2_main_t *km = &ikev2_main;
2940 km->pkey = ikev2_load_key_file (file);
2941 if (km->pkey == NULL)
2942 return clib_error_return (0, "load key '%s' failed", file);
2947 static_always_inline vnet_api_error_t
2948 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
2950 ikev2_main_t *km = &ikev2_main;
2951 udp_dst_port_info_t *pi;
2953 uword *v = hash_get (km->udp_ports, port);
2954 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
2958 /* IKE already uses this port, only increment reference counter */
2965 return VNET_API_ERROR_UDP_PORT_TAKEN;
2967 udp_register_dst_port (km->vlib_main, port,
2968 ipsec4_tun_input_node.index, 1);
2969 hash_set (km->udp_ports, port, 1);
2975 static_always_inline void
2976 ikev2_unregister_udp_port (ikev2_profile_t * p)
2978 ikev2_main_t *km = &ikev2_main;
2981 if (p->dst_port == IPSEC_UDP_PORT_NONE)
2984 v = hash_get (km->udp_ports, p->dst_port);
2992 udp_unregister_dst_port (km->vlib_main, p->dst_port, 1);
2993 hash_unset (km->udp_ports, p->dst_port);
2996 p->dst_port = IPSEC_UDP_PORT_NONE;
3000 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3002 ikev2_main_t *km = &ikev2_main;
3007 if (ikev2_profile_index_by_name (name))
3008 return clib_error_return (0, "policy %v already exists", name);
3010 pool_get (km->profiles, p);
3011 clib_memset (p, 0, sizeof (*p));
3012 p->name = vec_dup (name);
3013 p->dst_port = IPSEC_UDP_PORT_NONE;
3014 p->responder.sw_if_index = ~0;
3016 uword index = p - km->profiles;
3017 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3021 p = ikev2_profile_index_by_name (name);
3023 return clib_error_return (0, "policy %v does not exists", name);
3025 ikev2_unregister_udp_port (p);
3028 pool_put (km->profiles, p);
3029 mhash_unset (&km->profile_index_by_name, name, 0);
3035 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3036 u8 * auth_data, u8 data_hex_format)
3041 p = ikev2_profile_index_by_name (name);
3045 r = clib_error_return (0, "unknown profile %v", name);
3048 vec_free (p->auth.data);
3049 p->auth.method = auth_method;
3050 p->auth.data = vec_dup (auth_data);
3051 p->auth.hex = data_hex_format;
3053 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3055 vec_add1 (p->auth.data, 0);
3057 EVP_PKEY_free (p->auth.key);
3058 p->auth.key = ikev2_load_cert_file (auth_data);
3059 if (p->auth.key == NULL)
3060 return clib_error_return (0, "load cert '%s' failed", auth_data);
3067 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3073 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3074 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3076 r = clib_error_return (0, "unsupported identity type %U",
3077 format_ikev2_id_type, id_type);
3081 p = ikev2_profile_index_by_name (name);
3085 r = clib_error_return (0, "unknown profile %v", name);
3091 vec_free (p->loc_id.data);
3092 p->loc_id.type = id_type;
3093 p->loc_id.data = vec_dup (data);
3097 vec_free (p->rem_id.data);
3098 p->rem_id.type = id_type;
3099 p->rem_id.data = vec_dup (data);
3106 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3107 u16 start_port, u16 end_port, ip4_address_t start_addr,
3108 ip4_address_t end_addr, int is_local)
3113 p = ikev2_profile_index_by_name (name);
3117 r = clib_error_return (0, "unknown profile %v", name);
3123 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3124 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3125 p->loc_ts.start_port = start_port;
3126 p->loc_ts.end_port = end_port;
3127 p->loc_ts.protocol_id = protocol_id;
3128 p->loc_ts.ts_type = 7;
3132 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3133 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3134 p->rem_ts.start_port = start_port;
3135 p->rem_ts.end_port = end_port;
3136 p->rem_ts.protocol_id = protocol_id;
3137 p->rem_ts.ts_type = 7;
3145 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3146 u32 sw_if_index, ip4_address_t ip4)
3151 p = ikev2_profile_index_by_name (name);
3155 r = clib_error_return (0, "unknown profile %v", name);
3159 p->responder.sw_if_index = sw_if_index;
3160 p->responder.ip4 = ip4;
3166 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3167 ikev2_transform_encr_type_t crypto_alg,
3168 ikev2_transform_integ_type_t integ_alg,
3169 ikev2_transform_dh_type_t dh_type,
3170 u32 crypto_key_size)
3175 p = ikev2_profile_index_by_name (name);
3179 r = clib_error_return (0, "unknown profile %v", name);
3183 p->ike_ts.crypto_alg = crypto_alg;
3184 p->ike_ts.integ_alg = integ_alg;
3185 p->ike_ts.dh_type = dh_type;
3186 p->ike_ts.crypto_key_size = crypto_key_size;
3191 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3192 ikev2_transform_encr_type_t crypto_alg,
3193 ikev2_transform_integ_type_t integ_alg,
3194 ikev2_transform_dh_type_t dh_type,
3195 u32 crypto_key_size)
3200 p = ikev2_profile_index_by_name (name);
3204 r = clib_error_return (0, "unknown profile %v", name);
3208 p->esp_ts.crypto_alg = crypto_alg;
3209 p->esp_ts.integ_alg = integ_alg;
3210 p->esp_ts.dh_type = dh_type;
3211 p->esp_ts.crypto_key_size = crypto_key_size;
3216 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3217 u8 * name, u32 sw_if_index)
3222 p = ikev2_profile_index_by_name (name);
3226 r = clib_error_return (0, "unknown profile %v", name);
3230 p->tun_itf = sw_if_index;
3236 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3239 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3240 ikev2_main_t *km = &ikev2_main;
3241 vnet_api_error_t rv = 0;
3245 return VNET_API_ERROR_INVALID_VALUE;
3249 if (p->dst_port != IPSEC_UDP_PORT_NONE)
3250 return VNET_API_ERROR_VALUE_EXIST;
3252 rv = ikev2_register_udp_port (p, port);
3256 v = hash_get (km->udp_ports, port);
3258 return VNET_API_ERROR_IKE_NO_PORT;
3260 if (p->dst_port == IPSEC_UDP_PORT_NONE)
3261 return VNET_API_ERROR_INVALID_VALUE;
3263 ikev2_unregister_udp_port (p);
3269 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3271 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3276 r = clib_error_return (0, "unknown profile %v", name);
3285 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3286 u64 lifetime, u32 jitter, u32 handover,
3292 p = ikev2_profile_index_by_name (name);
3296 r = clib_error_return (0, "unknown profile %v", name);
3300 p->lifetime = lifetime;
3301 p->lifetime_jitter = jitter;
3302 p->handover = handover;
3303 p->lifetime_maxdata = maxdata;
3308 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3312 ip4_main_t *im = &ip4_main;
3313 ikev2_main_t *km = &ikev2_main;
3315 p = ikev2_profile_index_by_name (name);
3319 r = clib_error_return (0, "unknown profile %v", name);
3323 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3325 r = clib_error_return (0, "responder not set for profile %v", name);
3330 /* Create the Initiator Request */
3334 ip_lookup_main_t *lm = &im->lookup_main;
3336 int len = sizeof (ike_header_t);
3338 /* Get own iface IP */
3340 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3341 ip_interface_address_t *if_add =
3342 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3343 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3345 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3347 /* Prepare the SA and the IKE payload */
3349 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3350 ikev2_payload_chain_t *chain = 0;
3351 ikev2_payload_new_chain (chain);
3353 /* Build the IKE proposal payload */
3354 ikev2_sa_proposal_t *proposals = 0;
3355 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3356 proposals[0].proposal_num = 1;
3357 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3359 /* Add and then cleanup proposal data */
3360 ikev2_payload_add_sa (chain, proposals);
3361 ikev2_sa_free_proposal_vector (&proposals);
3363 sa.is_initiator = 1;
3364 sa.profile_index = km->profiles - p;
3365 sa.is_profile_index_set = 1;
3366 sa.state = IKEV2_STATE_SA_INIT;
3367 sa.tun_itf = p->tun_itf;
3368 sa.udp_encap = p->udp_encap;
3369 sa.dst_port = p->dst_port;
3370 sa.is_tun_itf_set = 1;
3371 sa.initial_contact = 1;
3372 ikev2_generate_sa_init_data (&sa);
3373 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3374 ikev2_payload_add_nonce (chain, sa.i_nonce);
3376 /* Build the child SA proposal */
3377 vec_resize (sa.childs, 1);
3378 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3379 &sa.childs[0].i_proposals, 0);
3380 sa.childs[0].i_proposals[0].proposal_num = 1;
3381 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3382 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3383 sizeof (sa.childs[0].i_proposals[0].spi));
3387 /* Add NAT detection notification messages (mandatory) */
3388 u8 nat_detection_source[8 + 8 + 4 + 2];
3389 u8 *nat_detection_sha1 = vec_new (u8, 20);
3391 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3392 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3393 tmpspi = clib_host_to_net_u64 (sa.rspi);
3394 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3395 u16 tmpport = clib_host_to_net_u16 (500);
3396 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3398 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3399 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3400 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3401 nat_detection_sha1);
3402 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3403 nat_detection_sha1);
3404 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3405 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3406 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3407 nat_detection_sha1);
3408 ikev2_payload_add_notify (chain,
3409 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3410 nat_detection_sha1);
3411 vec_free (nat_detection_sha1);
3413 u8 *sig_hash_algo = vec_new (u8, 8);
3414 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3415 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3416 ikev2_payload_add_notify (chain,
3417 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3419 vec_free (sig_hash_algo);
3422 /* Buffer update and boilerplate */
3423 len += vec_len (chain->data);
3424 ike0->nextpayload = chain->first_payload_type;
3425 ike0->length = clib_host_to_net_u32 (len);
3426 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3427 ikev2_payload_destroy_chain (chain);
3429 ike0->version = IKE_VERSION_2;
3430 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3431 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3432 ike0->ispi = sa.ispi;
3436 /* store whole IKE payload - needed for PSK auth */
3437 vec_free (sa.last_sa_init_req_packet_data);
3438 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3440 /* add data to the SA then add it to the pool */
3441 sa.iaddr.as_u32 = if_ip->as_u32;
3442 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3443 sa.i_id.type = p->loc_id.type;
3444 sa.i_id.data = vec_dup (p->loc_id.data);
3445 sa.i_auth.method = p->auth.method;
3446 sa.i_auth.hex = p->auth.hex;
3447 sa.i_auth.data = vec_dup (p->auth.data);
3448 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3449 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3451 ikev2_initial_contact_cleanup (&sa);
3453 /* add SA to the pool */
3454 ikev2_sa_t *sa0 = 0;
3455 pool_get (km->sais, sa0);
3456 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3457 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3459 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3461 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3462 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3463 p->responder.ip4.as_u32);
3470 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3471 ikev2_child_sa_t * csa)
3473 /* Create the Initiator notification for child SA removal */
3474 ikev2_main_t *km = &ikev2_main;
3479 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3482 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3483 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3484 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3485 vec_resize (sa->del, 1);
3486 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3487 sa->del->spi = csa->i_proposals->spi;
3488 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3489 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3490 len = ikev2_generate_message (sa, ike0, 0);
3492 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3494 /* delete local child SA */
3495 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3496 ikev2_sa_del_child_sa (sa, csa);
3500 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3503 ikev2_main_t *km = &ikev2_main;
3504 ikev2_main_per_thread_data_t *tkm;
3505 ikev2_sa_t *fsa = 0;
3506 ikev2_child_sa_t *fchild = 0;
3508 /* Search for the child SA */
3509 vec_foreach (tkm, km->per_thread_data)
3515 pool_foreach (sa, tkm->sas, ({
3516 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3526 if (!fchild || !fsa)
3528 r = clib_error_return (0, "Child SA not found");
3533 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3540 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3543 ikev2_main_t *km = &ikev2_main;
3544 ikev2_main_per_thread_data_t *tkm;
3545 ikev2_sa_t *fsa = 0;
3546 ikev2_main_per_thread_data_t *ftkm = 0;
3548 /* Search for the IKE SA */
3549 vec_foreach (tkm, km->per_thread_data)
3555 pool_foreach (sa, tkm->sas, ({
3556 if (sa->ispi == ispi)
3568 r = clib_error_return (0, "IKE SA not found");
3573 /* Create the Initiator notification for IKE SA removal */
3579 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3582 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3583 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3584 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3585 vec_resize (fsa->del, 1);
3586 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3587 fsa->del->spi = ispi;
3588 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3589 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3590 len = ikev2_generate_message (fsa, ike0, 0);
3592 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3596 /* delete local SA */
3597 ikev2_child_sa_t *c;
3598 vec_foreach (c, fsa->childs)
3600 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3601 ikev2_sa_del_child_sa (fsa, c);
3603 ikev2_sa_free_all_vec (fsa);
3604 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3607 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3608 pool_put (ftkm->sas, fsa);
3616 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3617 ikev2_child_sa_t * csa)
3619 /* Create the Initiator request for create child SA */
3625 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3628 ike0->version = IKE_VERSION_2;
3629 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3630 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3631 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3632 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3633 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3634 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3636 ikev2_rekey_t *rekey;
3637 vec_add2 (sa->rekey, rekey, 1);
3638 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3641 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3642 rekey->spi = proposals[0].spi;
3643 rekey->ispi = csa->i_proposals->spi;
3644 len = ikev2_generate_message (sa, ike0, proposals);
3645 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3646 vec_free (proposals);
3650 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3653 ikev2_main_t *km = &ikev2_main;
3654 ikev2_main_per_thread_data_t *tkm;
3655 ikev2_sa_t *fsa = 0;
3656 ikev2_child_sa_t *fchild = 0;
3658 /* Search for the child SA */
3659 vec_foreach (tkm, km->per_thread_data)
3665 pool_foreach (sa, tkm->sas, ({
3666 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3676 if (!fchild || !fsa)
3678 r = clib_error_return (0, "Child SA not found");
3683 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3690 ikev2_init (vlib_main_t * vm)
3692 ikev2_main_t *km = &ikev2_main;
3693 vlib_thread_main_t *tm = vlib_get_thread_main ();
3696 clib_memset (km, 0, sizeof (ikev2_main_t));
3697 km->vnet_main = vnet_get_main ();
3700 ikev2_crypto_init (km);
3702 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3704 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3705 CLIB_CACHE_LINE_BYTES);
3706 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3708 km->per_thread_data[thread_id].sa_by_rspi =
3709 hash_create (0, sizeof (uword));
3712 km->sa_by_ispi = hash_create (0, sizeof (uword));
3713 km->sw_if_indices = hash_create (0, 0);
3714 km->udp_ports = hash_create (0, sizeof (uword));
3716 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3718 ikev2_cli_reference ();
3720 km->log_level = IKEV2_LOG_ERROR;
3721 km->log_class = vlib_log_register_class ("ikev2", 0);
3726 VLIB_INIT_FUNCTION (ikev2_init) =
3728 .runs_after = VLIB_INITS("ipsec_init"),
3733 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
3736 ikev2_main_t *km = &ikev2_main;
3737 ikev2_profile_t *p = 0;
3738 vlib_main_t *vm = km->vlib_main;
3739 f64 now = vlib_time_now (vm);
3742 if (sa->is_profile_index_set)
3743 p = pool_elt_at_index (km->profiles, sa->profile_index);
3745 if (sa->is_initiator && p && csa->time_to_expiration
3746 && now > csa->time_to_expiration)
3748 if (!csa->is_expired || csa->rekey_retries > 0)
3750 ikev2_rekey_child_sa_internal (vm, sa, csa);
3751 csa->time_to_expiration = now + p->handover;
3752 csa->is_expired = 1;
3753 if (csa->rekey_retries == 0)
3755 csa->rekey_retries = 5;
3757 else if (csa->rekey_retries > 0)
3759 csa->rekey_retries--;
3760 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3761 csa->i_proposals->spi, csa->rekey_retries);
3762 if (csa->rekey_retries == 0)
3764 csa->rekey_retries = -1;
3771 csa->time_to_expiration = 0;
3772 ikev2_delete_child_sa_internal (vm, sa, csa);
3779 ipip_tunnel_t *ipip = NULL;
3780 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
3781 if (~0 == sw_if_index)
3783 ip46_address_t local_ip;
3784 ip46_address_t remote_ip;
3785 if (sa->is_initiator)
3787 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
3788 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
3792 ip46_address_set_ip4 (&local_ip, &sa->raddr);
3793 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
3797 ipip_tunnel_key_t key = {
3800 .transport = IPIP_TRANSPORT_IP4,
3805 ipip = ipip_tunnel_db_find (&key);
3808 sw_if_index = ipip->sw_if_index;
3814 vec_add1 (sas_in, csa->remote_sa_id);
3815 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
3816 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
3823 ikev2_set_log_level (ikev2_log_level_t log_level)
3825 ikev2_main_t *km = &ikev2_main;
3827 if (log_level >= IKEV2_LOG_MAX)
3829 ikev2_log_error ("unknown logging level %d", log_level);
3833 km->log_level = log_level;
3838 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3840 ikev2_main_t *km = &ikev2_main;
3841 vlib_main_t *vm = km->vlib_main;
3842 ikev2_main_per_thread_data_t *tkm;
3843 ikev2_sa_t *fsa = 0;
3844 ikev2_profile_t *p = 0;
3845 ikev2_child_sa_t *fchild = 0;
3846 f64 now = vlib_time_now (vm);
3847 vlib_counter_t counts;
3849 /* Search for the SA and child SA */
3850 vec_foreach (tkm, km->per_thread_data)
3856 pool_foreach (sa, tkm->sas, ({
3857 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3866 vlib_get_combined_counter (&ipsec_sa_counters,
3867 ipsec_sa->stat_index, &counts);
3869 if (fsa && fsa->is_profile_index_set)
3870 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3872 if (fchild && p && p->lifetime_maxdata)
3874 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3876 fchild->time_to_expiration = now;
3882 ikev2_process_pending_sa_init (ikev2_main_t * km)
3889 hash_foreach (ispi, sai, km->sa_by_ispi,
3891 sa = pool_elt_at_index (km->sais, sai);
3893 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
3896 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
3897 clib_memcpy_fast (vlib_buffer_get_current (b),
3898 sa->last_sa_init_req_packet_data,
3899 vec_len (sa->last_sa_init_req_packet_data));
3900 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
3901 vec_len (sa->last_sa_init_req_packet_data));
3906 static vlib_node_registration_t ikev2_mngr_process_node;
3909 ikev2_send_informational_request (ikev2_sa_t * sa)
3911 ikev2_main_t *km = &ikev2_main;
3912 ip4_address_t *src, *dst;
3917 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
3919 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3920 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3921 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3922 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3923 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3924 len = ikev2_generate_message (sa, ike0, 0);
3926 if (sa->is_initiator)
3938 ikev2_send_ike (km->vlib_main, src, dst, bi0, len);
3941 static_always_inline int
3942 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
3944 ikev2_main_t *km = &ikev2_main;
3945 vlib_main_t *vm = km->vlib_main;
3947 if (sa->liveness_retries > IKEV2_LIVENESS_RETRIES)
3950 f64 now = vlib_time_now (vm);
3952 if (sa->liveness_period_check < now)
3954 sa->liveness_retries++;
3955 sa->liveness_period_check = now + IKEV2_LIVENESS_PERIOD_CHECK;
3956 ikev2_send_informational_request (sa);
3962 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3965 ikev2_main_t *km = &ikev2_main;
3966 ipsec_main_t *im = &ipsec_main;
3968 ikev2_child_sa_t *c;
3974 vlib_process_wait_for_event_or_clock (vm, 1);
3975 vlib_process_get_events (vm, NULL);
3977 /* process ike child sas */
3978 ikev2_main_per_thread_data_t *tkm;
3979 vec_foreach (tkm, km->per_thread_data)
3982 u32 *to_be_deleted = 0;
3985 pool_foreach (sa, tkm->sas, ({
3986 ikev2_child_sa_t *c;
3988 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
3990 sa->old_remote_id_present = 0;
3994 sa->old_id_expiration -= 1;
3996 vec_foreach (c, sa->childs)
3998 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4001 if (ikev2_mngr_process_responder_sas (sa))
4002 vec_add1 (to_be_deleted, sa - tkm->sas);
4006 vec_foreach (sai, to_be_deleted)
4008 sa = pool_elt_at_index (tkm->sas, sai[0]);
4009 if (sa->is_initiator && sa->is_profile_index_set)
4011 p = pool_elt_at_index (km->profiles, sa->profile_index);
4014 ikev2_initiate_sa_init (vm, p->name);
4018 vec_foreach (c, sa->childs)
4019 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4020 hash_unset (tkm->sa_by_rspi, sa->rspi);
4021 pool_put (tkm->sas, sa);
4025 /* process ipsec sas */
4028 pool_foreach (sa, im->sad, ({
4029 ikev2_mngr_process_ipsec_sa(sa);
4033 ikev2_process_pending_sa_init (km);
4037 vlib_process_wait_for_event_or_clock (vm, 5);
4038 vlib_process_get_events (vm, NULL);
4047 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4048 .function = ikev2_mngr_process_fn,
4049 .type = VLIB_NODE_TYPE_PROCESS,
4051 "ikev2-manager-process",
4054 VLIB_PLUGIN_REGISTER () = {
4055 .version = VPP_BUILD_VER,
4056 .description = "Internet Key Exchange (IKEv2) Protocol",
4061 * fd.io coding-style-patch-verification: ON
4064 * eval: (c-set-style "gnu")