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 3
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;
383 /*move some data to the new SA */
384 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
385 sa->i_nonce = _(sai->i_nonce);
386 sa->i_dh_data = _(sai->i_dh_data);
387 sa->dh_private_key = _(sai->dh_private_key);
388 sa->iaddr.as_u32 = sai->iaddr.as_u32;
389 sa->raddr.as_u32 = sai->raddr.as_u32;
390 sa->is_initiator = sai->is_initiator;
391 sa->i_id.type = sai->i_id.type;
392 sa->profile_index = sai->profile_index;
393 sa->is_profile_index_set = sai->is_profile_index_set;
394 sa->tun_itf = sai->tun_itf;
395 sa->is_tun_itf_set = sai->is_tun_itf_set;
396 sa->i_id.data = _(sai->i_id.data);
397 sa->i_auth.method = sai->i_auth.method;
398 sa->i_auth.hex = sai->i_auth.hex;
399 sa->i_auth.data = _(sai->i_auth.data);
400 sa->i_auth.key = _(sai->i_auth.key);
401 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
402 sa->childs = _(sai->childs);
403 sa->udp_encap = sai->udp_encap;
404 sa->dst_port = sai->dst_port;
408 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
413 /* check if received DH group is on our list of supported groups */
414 vec_foreach (t2, km->supported_transforms)
416 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
425 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
430 /* generate dh keys */
431 ikev2_complete_dh (sa, t);
436 ikev2_calc_keys (ikev2_sa_t * sa)
439 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
442 u16 integ_key_len = 0;
443 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
445 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
447 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
449 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
452 integ_key_len = tr_integ->key_len;
454 vec_append (s, sa->i_nonce);
455 vec_append (s, sa->r_nonce);
456 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
458 /* Calculate S = Ni | Nr | SPIi | SPIr */
460 vec_add2 (s, tmp, 2 * sizeof (*spi));
462 spi[0] = clib_host_to_net_u64 (sa->ispi);
463 spi[1] = clib_host_to_net_u64 (sa->rspi);
465 /* calculate PRFplus */
467 int len = tr_prf->key_trunc + /* SK_d */
468 integ_key_len * 2 + /* SK_ai, SK_ar */
469 tr_encr->key_len * 2 + /* SK_ei, SK_er */
470 tr_prf->key_len * 2; /* SK_pi, SK_pr */
472 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
479 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
480 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
481 pos += tr_prf->key_trunc;
486 sa->sk_ai = vec_new (u8, integ_key_len);
487 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
488 pos += integ_key_len;
491 sa->sk_ar = vec_new (u8, integ_key_len);
492 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
493 pos += integ_key_len;
497 sa->sk_ei = vec_new (u8, tr_encr->key_len);
498 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
499 pos += tr_encr->key_len;
502 sa->sk_er = vec_new (u8, tr_encr->key_len);
503 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
504 pos += tr_encr->key_len;
507 sa->sk_pi = vec_new (u8, tr_prf->key_len);
508 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
509 pos += tr_prf->key_len;
512 sa->sk_pr = vec_new (u8, tr_prf->key_len);
513 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
514 pos += tr_prf->key_len;
520 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
523 u16 integ_key_len = 0;
526 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
528 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
530 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
532 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
535 integ_key_len = ctr_integ->key_len;
537 salt_len = sizeof (u32);
539 vec_append (s, sa->i_nonce);
540 vec_append (s, sa->r_nonce);
541 /* calculate PRFplus */
543 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
545 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
550 child->sk_ei = vec_new (u8, ctr_encr->key_len);
551 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
552 pos += ctr_encr->key_len;
557 child->sk_ai = vec_new (u8, ctr_integ->key_len);
558 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
559 pos += ctr_integ->key_len;
563 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
568 child->sk_er = vec_new (u8, ctr_encr->key_len);
569 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
570 pos += ctr_encr->key_len;
575 child->sk_ar = vec_new (u8, integ_key_len);
576 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
577 pos += integ_key_len;
581 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
591 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
595 u32 len = clib_net_to_host_u32 (ike->length);
596 u8 payload = ike->nextpayload;
598 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
600 clib_net_to_host_u64 (ike->ispi),
601 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
603 sa->ispi = clib_net_to_host_u64 (ike->ispi);
605 /* store whole IKE payload - needed for PSK auth */
606 vec_free (sa->last_sa_init_req_packet_data);
607 vec_add (sa->last_sa_init_req_packet_data, ike, len);
609 while (p < len && payload != IKEV2_PAYLOAD_NONE)
611 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
612 u32 plen = clib_net_to_host_u16 (ikep->length);
614 if (plen < sizeof (ike_payload_header_t))
617 if (payload == IKEV2_PAYLOAD_SA)
619 ikev2_sa_free_proposal_vector (&sa->i_proposals);
620 sa->i_proposals = ikev2_parse_sa_payload (ikep);
622 else if (payload == IKEV2_PAYLOAD_KE)
624 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
625 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
626 vec_free (sa->i_dh_data);
627 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
629 else if (payload == IKEV2_PAYLOAD_NONCE)
631 vec_free (sa->i_nonce);
632 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
634 else if (payload == IKEV2_PAYLOAD_NOTIFY)
636 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
639 else if (payload == IKEV2_PAYLOAD_VENDOR)
641 ikev2_parse_vendor_payload (ikep);
645 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
647 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
649 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
650 sa->unsupported_cp = payload;
655 payload = ikep->nextpayload;
659 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
663 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
667 u32 len = clib_net_to_host_u32 (ike->length);
668 u8 payload = ike->nextpayload;
670 sa->ispi = clib_net_to_host_u64 (ike->ispi);
671 sa->rspi = clib_net_to_host_u64 (ike->rspi);
673 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
674 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
677 /* store whole IKE payload - needed for PSK auth */
678 vec_free (sa->last_sa_init_res_packet_data);
679 vec_add (sa->last_sa_init_res_packet_data, ike, len);
681 while (p < len && payload != IKEV2_PAYLOAD_NONE)
683 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
684 u32 plen = clib_net_to_host_u16 (ikep->length);
686 if (plen < sizeof (ike_payload_header_t))
689 if (payload == IKEV2_PAYLOAD_SA)
691 ikev2_sa_free_proposal_vector (&sa->r_proposals);
692 sa->r_proposals = ikev2_parse_sa_payload (ikep);
695 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
697 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
700 else if (payload == IKEV2_PAYLOAD_KE)
702 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
703 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
704 vec_free (sa->r_dh_data);
705 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
707 else if (payload == IKEV2_PAYLOAD_NONCE)
709 vec_free (sa->r_nonce);
710 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
712 else if (payload == IKEV2_PAYLOAD_NOTIFY)
714 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
717 else if (payload == IKEV2_PAYLOAD_VENDOR)
719 ikev2_parse_vendor_payload (ikep);
723 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
725 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
727 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
728 sa->unsupported_cp = payload;
733 payload = ikep->nextpayload;
739 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
744 u32 len = clib_net_to_host_u32 (ike->length);
745 ike_payload_header_t *ikep = 0;
747 ikev2_sa_transform_t *tr_integ;
749 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
752 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
754 ikep = (ike_payload_header_t *) & ike->payload[p];
755 plen = clib_net_to_host_u16 (ikep->length);
757 if (plen < sizeof (*ikep))
760 if (*payload == IKEV2_PAYLOAD_SK)
762 last_payload = *payload;
766 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
768 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
770 sa->unsupported_cp = *payload;
775 *payload = ikep->nextpayload;
779 if (last_payload != IKEV2_PAYLOAD_SK)
781 ikev2_elog_error ("Last payload must be SK");
786 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
787 (u8 *) ike, len - tr_integ->key_trunc);
789 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
791 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
793 ikev2_elog_error ("message integrity check failed");
799 return ikev2_decrypt_data (sa, ikep->payload, plen);
803 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
805 ikev2_main_t *km = &ikev2_main;
809 u32 thread_index = vlib_get_thread_index ();
811 if (!sa->initial_contact)
814 /* find old IKE SAs with the same authenticated identity */
816 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
817 if (tmp->i_id.type != sa->i_id.type ||
818 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
819 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
822 if (sa->rspi != tmp->rspi)
823 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
827 for (i = 0; i < vec_len (delete); i++)
830 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
832 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
834 ikev2_delete_sa (tmp);
838 sa->initial_contact = 0;
842 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
844 ikev2_child_sa_t *first_child_sa;
846 u8 payload = ike->nextpayload;
848 ike_payload_header_t *ikep;
851 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
852 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
853 clib_host_to_net_u64 (ike->rspi),
854 sa->is_initiator ? sa->raddr.as_u32 : sa->
857 ikev2_calc_keys (sa);
859 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
863 if (sa->unsupported_cp)
864 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
865 goto cleanup_and_exit;
868 /* select or create 1st child SA */
869 if (sa->is_initiator)
871 first_child_sa = &sa->childs[0];
875 ikev2_sa_free_all_child_sa (&sa->childs);
876 vec_add2 (sa->childs, first_child_sa, 1);
880 /* process encrypted payload */
882 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
884 ikep = (ike_payload_header_t *) & plaintext[p];
885 plen = clib_net_to_host_u16 (ikep->length);
887 if (plen < sizeof (ike_payload_header_t))
888 goto cleanup_and_exit;
890 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
892 if (sa->is_initiator)
894 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
895 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
899 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
900 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
903 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
905 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
907 sa->i_id.type = id->id_type;
908 vec_free (sa->i_id.data);
909 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
911 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
913 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
915 sa->r_id.type = id->id_type;
916 vec_free (sa->r_id.data);
917 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
919 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
921 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
923 if (sa->is_initiator)
925 sa->r_auth.method = a->auth_method;
926 vec_free (sa->r_auth.data);
927 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
931 sa->i_auth.method = a->auth_method;
932 vec_free (sa->i_auth.data);
933 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
936 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
938 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
939 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
941 sa->initial_contact = 1;
945 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
947 ikev2_parse_vendor_payload (ikep);
949 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
951 vec_free (first_child_sa->tsi);
952 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
954 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
956 vec_free (first_child_sa->tsr);
957 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
961 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
964 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
966 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
967 sa->unsupported_cp = payload;
972 payload = ikep->nextpayload;
977 vec_free (plaintext);
981 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
985 u8 payload = ike->nextpayload;
987 ike_payload_header_t *ikep;
990 sa->liveness_retries = 0;
991 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
992 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
993 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
995 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
998 goto cleanup_and_exit;
1000 /* process encrypted payload */
1002 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1004 ikep = (ike_payload_header_t *) & plaintext[p];
1005 plen = clib_net_to_host_u16 (ikep->length);
1007 if (plen < sizeof (ike_payload_header_t))
1008 goto cleanup_and_exit;
1010 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1012 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1013 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1014 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1017 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1019 sa->del = ikev2_parse_delete_payload (ikep);
1021 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1023 ikev2_parse_vendor_payload (ikep);
1027 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1029 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1031 sa->unsupported_cp = payload;
1036 payload = ikep->nextpayload;
1041 vec_free (plaintext);
1045 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1049 u8 payload = ike->nextpayload;
1052 u8 nonce[IKEV2_NONCE_SIZE];
1054 ike_payload_header_t *ikep;
1056 ikev2_notify_t *n = 0;
1057 ikev2_ts_t *tsi = 0;
1058 ikev2_ts_t *tsr = 0;
1059 ikev2_sa_proposal_t *proposal = 0;
1060 ikev2_child_sa_t *child_sa;
1062 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1063 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1064 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1066 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1069 goto cleanup_and_exit;
1071 /* process encrypted payload */
1073 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1075 ikep = (ike_payload_header_t *) & plaintext[p];
1076 plen = clib_net_to_host_u16 (ikep->length);
1078 if (plen < sizeof (ike_payload_header_t))
1079 goto cleanup_and_exit;
1081 else if (payload == IKEV2_PAYLOAD_SA)
1083 proposal = ikev2_parse_sa_payload (ikep);
1085 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1087 n = ikev2_parse_notify_payload (ikep);
1088 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1093 else if (payload == IKEV2_PAYLOAD_DELETE)
1095 sa->del = ikev2_parse_delete_payload (ikep);
1097 else if (payload == IKEV2_PAYLOAD_VENDOR)
1099 ikev2_parse_vendor_payload (ikep);
1101 else if (payload == IKEV2_PAYLOAD_NONCE)
1103 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1105 else if (payload == IKEV2_PAYLOAD_TSI)
1107 tsi = ikev2_parse_ts_payload (ikep);
1109 else if (payload == IKEV2_PAYLOAD_TSR)
1111 tsr = ikev2_parse_ts_payload (ikep);
1115 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1117 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1119 sa->unsupported_cp = payload;
1124 payload = ikep->nextpayload;
1128 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1130 ikev2_rekey_t *rekey = &sa->rekey[0];
1131 rekey->protocol_id = proposal->protocol_id;
1133 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1134 rekey->i_proposal->spi = rekey->spi;
1135 rekey->r_proposal = proposal;
1139 vec_free (sa->r_nonce);
1140 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1141 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1144 child_sa->rekey_retries = 0;
1149 ikev2_rekey_t *rekey;
1150 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1153 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1155 goto cleanup_and_exit;
1157 vec_add2 (sa->rekey, rekey, 1);
1158 rekey->protocol_id = n->protocol_id;
1159 rekey->spi = n->spi;
1160 rekey->i_proposal = proposal;
1162 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1166 vec_free (sa->i_nonce);
1167 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1168 /* generate new Nr */
1169 vec_free (sa->r_nonce);
1170 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1171 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1175 vec_free (plaintext);
1180 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1188 ikev2_sa_transform_t *tr_prf;
1191 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1197 nonce = sa->i_nonce;
1198 packet_data = sa->last_sa_init_res_packet_data;
1204 nonce = sa->r_nonce;
1205 packet_data = sa->last_sa_init_req_packet_data;
1208 data = vec_new (u8, 4);
1210 vec_append (data, id->data);
1212 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1213 vec_append (authmsg, packet_data);
1214 vec_append (authmsg, nonce);
1215 vec_append (authmsg, id_hash);
1223 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1225 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1226 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1227 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1228 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1235 ikev2_sa_match_ts (ikev2_sa_t * sa)
1237 ikev2_main_t *km = &ikev2_main;
1239 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1243 pool_foreach (p, km->profiles, ({
1245 if (sa->is_initiator)
1259 if (p->rem_id.type != id->type ||
1260 vec_len(p->rem_id.data) != vec_len(id->data) ||
1261 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1264 vec_foreach(ts, sa->childs[0].tsi)
1266 if (ikev2_ts_cmp(p_tsi, ts))
1268 vec_add1 (tsi, ts[0]);
1273 vec_foreach(ts, sa->childs[0].tsr)
1275 if (ikev2_ts_cmp(p_tsr, ts))
1277 vec_add1 (tsr, ts[0]);
1288 vec_free (sa->childs[0].tsi);
1289 vec_free (sa->childs[0].tsr);
1290 sa->childs[0].tsi = tsi;
1291 sa->childs[0].tsr = tsr;
1297 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1302 ikev2_sa_auth (ikev2_sa_t * sa)
1304 ikev2_main_t *km = &ikev2_main;
1305 ikev2_profile_t *p, *sel_p = 0;
1306 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1307 ikev2_sa_transform_t *tr_prf;
1310 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1312 /* only shared key and rsa signature */
1313 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1314 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1316 ikev2_elog_uint (IKEV2_LOG_ERROR,
1317 "unsupported authentication method %u",
1319 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1323 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1324 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1327 ikev2_auth_t *sa_auth;
1329 if (sa->is_initiator)
1332 sa_auth = &sa->r_auth;
1337 sa_auth = &sa->i_auth;
1341 pool_foreach (p, km->profiles, ({
1344 if (p->rem_id.type != sa_id->type ||
1345 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1346 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1349 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1351 if (!p->auth.data ||
1352 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1355 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1356 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1358 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1360 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1367 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1369 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1372 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1374 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1387 sa->udp_encap = sel_p->udp_encap;
1388 sa->dst_port = sel_p->dst_port;
1392 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1394 if (!sa->is_initiator)
1396 vec_free (sa->r_id.data);
1397 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1398 sa->r_id.type = sel_p->loc_id.type;
1400 /* generate our auth data */
1401 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1402 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1404 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1405 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1407 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1409 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1410 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1414 /* select transforms for 1st child sa */
1415 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1416 sa->childs[0].r_proposals =
1417 ikev2_select_proposal (sa->childs[0].i_proposals,
1418 IKEV2_PROTOCOL_ESP);
1420 if (~0 != sel_p->tun_itf)
1422 sa->is_tun_itf_set = 1;
1423 sa->tun_itf = sel_p->tun_itf;
1429 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1430 "profile found! ispi %lx", sa->ispi);
1431 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1439 ikev2_sa_auth_init (ikev2_sa_t * sa)
1441 ikev2_main_t *km = &ikev2_main;
1442 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1443 ikev2_sa_transform_t *tr_prf;
1446 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1448 /* only shared key and rsa signature */
1449 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1450 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1452 ikev2_elog_uint (IKEV2_LOG_ERROR,
1453 "unsupported authentication method %u",
1455 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1459 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1460 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1461 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1462 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1465 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1467 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1468 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1470 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1472 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1473 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1483 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1485 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1489 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1491 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1501 ipsec_sa_flags_t flags;
1504 ipsec_crypto_alg_t encr_type;
1505 ipsec_integ_alg_t integ_type;
1506 ip46_address_t local_ip;
1507 ip46_address_t remote_ip;
1508 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1510 u32 old_remote_sa_id;
1512 } ikev2_add_ipsec_tunnel_args_t;
1515 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1517 ikev2_main_t *km = &ikev2_main;
1521 if (~0 == a->sw_if_index)
1523 /* no tunnel associated with the SA/profile - create a new one */
1524 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1525 &a->local_ip, &a->remote_ip, 0,
1526 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1527 TUNNEL_MODE_P2P, &sw_if_index);
1529 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1531 if (hash_get (km->sw_if_indices, sw_if_index))
1532 /* interface is managed by IKE; proceed with updating SAs */
1535 hash_set1 (km->sw_if_indices, sw_if_index);
1539 sw_if_index = a->sw_if_index;
1540 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1545 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1546 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1547 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1552 vec_add1 (sas_in, a->remote_sa_id);
1555 ipsec_tun_protect_del (sw_if_index, NULL);
1557 /* replace local SA immediately */
1558 ipsec_sa_unlock_id (a->local_sa_id);
1560 /* keep the old sa */
1561 vec_add1 (sas_in, a->old_remote_sa_id);
1564 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1566 IPSEC_PROTOCOL_ESP, a->encr_type,
1567 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1568 a->flags, 0, a->salt_local, &a->local_ip,
1569 &a->remote_ip, NULL, a->dst_port, a->dst_port);
1570 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1571 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1572 a->integ_type, &a->rem_ikey,
1573 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1574 a->salt_remote, &a->remote_ip,
1575 &a->local_ip, NULL, a->dst_port, a->dst_port);
1577 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1581 ikev2_create_tunnel_interface (vlib_main_t * vm,
1584 ikev2_child_sa_t * child, u32 sa_index,
1585 u32 child_index, u8 is_rekey)
1587 ikev2_main_t *km = &ikev2_main;
1588 ipsec_crypto_alg_t encr_type;
1589 ipsec_integ_alg_t integ_type;
1590 ikev2_profile_t *p = 0;
1591 ikev2_sa_transform_t *tr;
1592 ikev2_sa_proposal_t *proposals;
1594 ikev2_add_ipsec_tunnel_args_t a;
1596 clib_memset (&a, 0, sizeof (a));
1598 if (!child->r_proposals)
1600 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1604 if (sa->is_initiator)
1606 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1607 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1608 proposals = child->i_proposals;
1609 a.local_spi = child->r_proposals[0].spi;
1610 a.remote_spi = child->i_proposals[0].spi;
1614 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1615 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1616 proposals = child->r_proposals;
1617 a.local_spi = child->i_proposals[0].spi;
1618 a.remote_spi = child->r_proposals[0].spi;
1621 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1624 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1625 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1627 a.is_rekey = is_rekey;
1629 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1630 if (tr && tr->esn_type)
1631 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1633 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1636 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1638 switch (tr->key_len)
1641 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1644 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1647 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1650 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1655 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1658 switch (tr->key_len)
1661 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1664 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1667 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1670 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1678 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1684 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1687 a.encr_type = encr_type;
1691 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1694 switch (tr->integ_type)
1696 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1697 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1699 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1700 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1702 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1703 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1705 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1706 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1709 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1715 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1721 integ_type = IPSEC_INTEG_ALG_NONE;
1724 a.integ_type = integ_type;
1725 ikev2_calc_child_keys (sa, child);
1727 if (sa->is_initiator)
1729 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1730 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1731 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1732 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1735 a.salt_remote = child->salt_er;
1736 a.salt_local = child->salt_ei;
1741 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1742 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1743 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1744 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1747 a.salt_remote = child->salt_ei;
1748 a.salt_local = child->salt_er;
1752 if (sa->is_profile_index_set)
1753 p = pool_elt_at_index (km->profiles, sa->profile_index);
1755 if (p && p->lifetime)
1757 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1758 if (p->lifetime_jitter)
1760 // This is not much better than rand(3), which Coverity warns
1761 // is unsuitable for security applications; random_u32 is
1762 // however fast. If this perturbance to the expiration time
1763 // needs to use a better RNG then we may need to use something
1764 // like /dev/urandom which has significant overhead.
1765 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1766 rnd = random_u32 (&rnd);
1768 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1772 if (thread_index & 0xffffffc0)
1773 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1775 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1776 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1778 child->local_sa_id =
1780 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1782 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1787 /* create a new remote SA ID to keep the old SA for a bit longer
1788 * so the peer has some time to swap their SAs */
1790 /* use most significat bit of child index part in id */
1792 if (sa->current_remote_id_mask)
1794 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1795 sa->current_remote_id_mask = 0;
1799 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1800 sa->current_remote_id_mask = mask;
1801 remote_sa_id |= mask;
1803 sa->old_id_expiration = 3.0;
1804 sa->old_remote_id_present = 1;
1807 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1809 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1810 a.dst_port = sa->dst_port;
1812 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1813 (u8 *) & a, sizeof (a));
1819 ip46_address_t local_ip;
1820 ip46_address_t remote_ip;
1824 } ikev2_del_ipsec_tunnel_args_t;
1826 static_always_inline u32
1827 ikev2_flip_alternate_sa_bit (u32 id)
1836 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1838 ikev2_main_t *km = &ikev2_main;
1839 ipip_tunnel_t *ipip = NULL;
1842 if (~0 == a->sw_if_index)
1845 ipip_tunnel_key_t key = {
1847 .dst = a->remote_ip,
1848 .transport = IPIP_TRANSPORT_IP4,
1853 ipip = ipip_tunnel_db_find (&key);
1857 sw_if_index = ipip->sw_if_index;
1858 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1865 sw_if_index = a->sw_if_index;
1866 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1869 if (~0 != sw_if_index)
1870 ipsec_tun_protect_del (sw_if_index, NULL);
1872 ipsec_sa_unlock_id (a->remote_sa_id);
1873 ipsec_sa_unlock_id (a->local_sa_id);
1874 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
1877 ipip_del_tunnel (ipip->sw_if_index);
1881 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1882 ikev2_child_sa_t * child)
1884 ikev2_del_ipsec_tunnel_args_t a;
1886 clib_memset (&a, 0, sizeof (a));
1888 if (sa->is_initiator)
1890 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1891 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1895 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1896 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1899 a.remote_sa_id = child->remote_sa_id;
1900 a.local_sa_id = child->local_sa_id;
1901 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1903 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1909 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1912 ike_payload_header_t *ph;
1916 ikev2_sa_transform_t *tr_encr, *tr_integ;
1918 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1920 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1922 ikev2_payload_chain_t *chain = 0;
1923 ikev2_payload_new_chain (chain);
1925 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1927 if (sa->r_proposals == 0)
1929 ikev2_payload_add_notify (chain,
1930 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1931 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1933 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1935 u8 *data = vec_new (u8, 2);
1936 ikev2_sa_transform_t *tr_dh;
1938 ikev2_sa_get_td_for_type (sa->r_proposals,
1939 IKEV2_TRANSFORM_TYPE_DH);
1940 ASSERT (tr_dh && tr_dh->dh_type);
1942 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1943 data[1] = (tr_dh->dh_type) & 0xff;
1945 ikev2_payload_add_notify (chain,
1946 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1949 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1951 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1953 u8 *data = vec_new (u8, 1);
1955 data[0] = sa->unsupported_cp;
1956 ikev2_payload_add_notify (chain,
1957 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1963 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1964 ikev2_payload_add_sa (chain, sa->r_proposals);
1965 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1966 ikev2_payload_add_nonce (chain, sa->r_nonce);
1969 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1971 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1973 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1974 ikev2_payload_add_auth (chain, &sa->r_auth);
1975 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1976 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1977 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1979 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1981 ikev2_payload_add_notify (chain,
1982 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1984 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1986 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1988 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1990 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1991 ikev2_payload_add_auth (chain, &sa->r_auth);
1993 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1995 ikev2_payload_add_notify (chain,
1996 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1997 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1998 ikev2_payload_add_auth (chain, &sa->r_auth);
1999 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2000 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2002 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2004 u8 *data = vec_new (u8, 1);
2006 data[0] = sa->unsupported_cp;
2007 ikev2_payload_add_notify (chain,
2008 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2012 else if (sa->state == IKEV2_STATE_SA_INIT)
2014 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2015 ikev2_payload_add_auth (chain, &sa->i_auth);
2016 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2017 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2018 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2019 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2024 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2028 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2030 /* if pending delete */
2033 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2035 if (sa->is_initiator)
2036 ikev2_payload_add_delete (chain, sa->del);
2038 /* The response to a request that deletes the IKE SA is an empty
2039 INFORMATIONAL response. */
2040 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2042 /* The response to a request that deletes ESP or AH SAs will contain
2043 delete payloads for the paired SAs going in the other direction. */
2046 ikev2_payload_add_delete (chain, sa->del);
2051 /* received N(AUTHENTICATION_FAILED) */
2052 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2054 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2057 /* received unsupported critical payload */
2058 else if (sa->unsupported_cp)
2060 u8 *data = vec_new (u8, 1);
2062 data[0] = sa->unsupported_cp;
2063 ikev2_payload_add_notify (chain,
2064 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2067 sa->unsupported_cp = 0;
2069 /* else send empty response */
2071 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2073 if (sa->is_initiator)
2076 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2077 ikev2_notify_t notify;
2078 u8 *data = vec_new (u8, 4);
2079 clib_memset (¬ify, 0, sizeof (notify));
2080 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2081 notify.spi = sa->childs[0].i_proposals->spi;
2082 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2084 ikev2_payload_add_sa (chain, proposals);
2085 ikev2_payload_add_nonce (chain, sa->i_nonce);
2086 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2087 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2088 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2097 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2098 ikev2_payload_add_nonce (chain, sa->r_nonce);
2099 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2101 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2103 vec_del1 (sa->rekey, 0);
2105 else if (sa->unsupported_cp)
2107 u8 *data = vec_new (u8, 1);
2109 data[0] = sa->unsupported_cp;
2110 ikev2_payload_add_notify (chain,
2111 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2114 sa->unsupported_cp = 0;
2118 ikev2_payload_add_notify (chain,
2119 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2126 ike->version = IKE_VERSION_2;
2127 ike->nextpayload = IKEV2_PAYLOAD_SK;
2128 tlen = sizeof (*ike);
2129 if (sa->is_initiator)
2131 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2132 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2136 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2140 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2142 tlen += vec_len (chain->data);
2143 ike->nextpayload = chain->first_payload_type;
2144 ike->length = clib_host_to_net_u32 (tlen);
2145 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2147 /* store whole IKE payload - needed for PSK auth */
2148 vec_free (sa->last_sa_init_res_packet_data);
2149 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2154 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2157 plen = sizeof (*ph);
2158 ph = (ike_payload_header_t *) & ike->payload[0];
2159 ph->nextpayload = chain->first_payload_type;
2161 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2164 /* add space for hmac */
2165 plen += tr_integ->key_trunc;
2168 /* payload and total length */
2169 ph->length = clib_host_to_net_u16 (plen);
2170 ike->length = clib_host_to_net_u32 (tlen);
2172 /* calc integrity data for whole packet except hash itself */
2174 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2175 (u8 *) ike, tlen - tr_integ->key_trunc);
2177 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2178 sizeof (*ike), integ, tr_integ->key_trunc);
2180 /* store whole IKE payload - needed for retransmit */
2181 vec_free (sa->last_res_packet_data);
2182 vec_add (sa->last_res_packet_data, ike, tlen);
2186 ikev2_payload_destroy_chain (chain);
2192 ikev2_retransmit_sa_init (ike_header_t * ike,
2193 ip4_address_t iaddr, ip4_address_t raddr)
2195 ikev2_main_t *km = &ikev2_main;
2197 u32 thread_index = vlib_get_thread_index ();
2200 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2201 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2202 sa->iaddr.as_u32 == iaddr.as_u32 &&
2203 sa->raddr.as_u32 == raddr.as_u32)
2206 u32 len = clib_net_to_host_u32(ike->length);
2207 u8 payload = ike->nextpayload;
2209 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2210 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2211 u32 plen = clib_net_to_host_u16(ikep->length);
2213 if (plen < sizeof(ike_payload_header_t))
2216 if (payload == IKEV2_PAYLOAD_NONCE)
2218 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2220 /* req is retransmit */
2221 if (sa->state == IKEV2_STATE_SA_INIT)
2224 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2225 ike->ispi = tmp->ispi;
2226 ike->rspi = tmp->rspi;
2227 ike->nextpayload = tmp->nextpayload;
2228 ike->version = tmp->version;
2229 ike->exchange = tmp->exchange;
2230 ike->flags = tmp->flags;
2231 ike->msgid = tmp->msgid;
2232 ike->length = tmp->length;
2233 clib_memcpy_fast(ike->payload, tmp->payload,
2234 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2235 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2236 "ispi %lx IKE_SA_INIT retransmit "
2237 "from %d.%d.%d.%d to %d.%d.%d.%d",
2239 raddr.as_u32, iaddr.as_u32);
2242 /* else ignore req */
2245 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2246 "ispi %lx IKE_SA_INIT ignore "
2247 "from %d.%d.%d.%d to %d.%d.%d.%d",
2249 raddr.as_u32, iaddr.as_u32);
2254 payload = ikep->nextpayload;
2261 /* req is not retransmit */
2266 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2268 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2271 if (msg_id > sa->last_msg_id)
2273 sa->last_msg_id = msg_id;
2276 /* retransmitted req */
2277 else if (msg_id == sa->last_msg_id)
2280 tmp = (ike_header_t *) sa->last_res_packet_data;
2281 ike->ispi = tmp->ispi;
2282 ike->rspi = tmp->rspi;
2283 ike->nextpayload = tmp->nextpayload;
2284 ike->version = tmp->version;
2285 ike->exchange = tmp->exchange;
2286 ike->flags = tmp->flags;
2287 ike->msgid = tmp->msgid;
2288 ike->length = tmp->length;
2289 clib_memcpy_fast (ike->payload, tmp->payload,
2290 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2291 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2292 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2295 /* old req ignore */
2298 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2299 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2305 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2307 ikev2_main_t *km = &ikev2_main;
2308 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2312 ikev2_del_sa_init_from_main (u64 * ispi)
2314 ikev2_main_t *km = &ikev2_main;
2315 uword *p = hash_get (km->sa_by_ispi, *ispi);
2318 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2319 hash_unset (km->sa_by_ispi, sai->ispi);
2320 ikev2_sa_free_all_vec (sai);
2321 pool_put (km->sais, sai);
2326 ikev2_del_sa_init (u64 ispi)
2328 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2333 ikev2_node_fn (vlib_main_t * vm,
2334 vlib_node_runtime_t * node, vlib_frame_t * frame)
2336 u32 n_left_from, *from, *to_next;
2337 ikev2_next_t next_index;
2338 ikev2_main_t *km = &ikev2_main;
2339 u32 thread_index = vlib_get_thread_index ();
2341 from = vlib_frame_vector_args (frame);
2342 n_left_from = frame->n_vectors;
2343 next_index = node->cached_next_index;
2345 while (n_left_from > 0)
2349 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2351 while (n_left_from > 0 && n_left_to_next > 0)
2355 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2360 ikev2_sa_t *sa0 = 0;
2361 ikev2_sa_t sa; /* temporary store for SA */
2365 /* speculatively enqueue b0 to the current next frame */
2371 n_left_to_next -= 1;
2373 b0 = vlib_get_buffer (vm, bi0);
2374 ike0 = vlib_buffer_get_current (b0);
2375 vlib_buffer_advance (b0, -sizeof (*udp0));
2376 udp0 = vlib_buffer_get_current (b0);
2377 vlib_buffer_advance (b0, -sizeof (*ip40));
2378 ip40 = vlib_buffer_get_current (b0);
2380 if (ike0->version != IKE_VERSION_2)
2382 vlib_node_increment_counter (vm, ikev2_node.index,
2383 IKEV2_ERROR_NOT_IKEV2, 1);
2387 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2390 clib_memset (sa0, 0, sizeof (*sa0));
2392 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2394 if (ike0->rspi == 0)
2396 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2397 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2399 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2403 vlib_node_increment_counter (vm, ikev2_node.index,
2404 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2406 len = clib_net_to_host_u32 (ike0->length);
2411 vlib_node_increment_counter (vm, ikev2_node.index,
2412 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2417 ikev2_process_sa_init_req (vm, sa0, ike0);
2419 if (sa0->state == IKEV2_STATE_SA_INIT)
2421 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2423 ikev2_select_proposal (sa0->i_proposals,
2424 IKEV2_PROTOCOL_IKE);
2425 ikev2_generate_sa_init_data (sa0);
2428 if (sa0->state == IKEV2_STATE_SA_INIT
2429 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2431 len = ikev2_generate_message (sa0, ike0, 0);
2434 if (sa0->state == IKEV2_STATE_SA_INIT)
2436 /* add SA to the pool */
2437 pool_get (km->per_thread_data[thread_index].sas,
2439 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2440 ikev2_init_sa (vm, sa0);
2442 per_thread_data[thread_index].sa_by_rspi,
2445 km->per_thread_data[thread_index].sas);
2449 ikev2_sa_free_all_vec (sa0);
2453 else //received sa_init without initiator flag
2455 ikev2_process_sa_init_resp (vm, sa0, ike0);
2457 if (sa0->state == IKEV2_STATE_SA_INIT)
2459 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2460 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2464 pool_elt_at_index (km->sais, p[0]);
2466 if (clib_atomic_bool_cmp_and_swap
2467 (&sai->init_response_received, 0, 1))
2469 ikev2_complete_sa_data (sa0, sai);
2470 ikev2_calc_keys (sa0);
2471 ikev2_sa_auth_init (sa0);
2472 len = ikev2_generate_message (sa0, ike0, 0);
2476 /* we've already processed sa-init response */
2477 sa0->state = IKEV2_STATE_UNKNOWN;
2482 if (sa0->state == IKEV2_STATE_SA_INIT)
2484 /* add SA to the pool */
2485 pool_get (km->per_thread_data[thread_index].sas, sa0);
2486 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2487 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2489 sa0 - km->per_thread_data[thread_index].sas);
2493 ikev2_sa_free_all_vec (sa0);
2497 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2500 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2501 clib_net_to_host_u64 (ike0->rspi));
2505 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2508 r = ikev2_retransmit_resp (sa0, ike0);
2511 vlib_node_increment_counter (vm, ikev2_node.index,
2512 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2514 len = clib_net_to_host_u32 (ike0->length);
2519 vlib_node_increment_counter (vm, ikev2_node.index,
2520 IKEV2_ERROR_IKE_REQ_IGNORE,
2525 ikev2_process_auth_req (vm, sa0, ike0);
2526 ikev2_sa_auth (sa0);
2527 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2529 ikev2_initial_contact_cleanup (sa0);
2530 ikev2_sa_match_ts (sa0);
2531 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2532 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2537 if (sa0->is_initiator)
2539 ikev2_del_sa_init (ike0->ispi);
2543 len = ikev2_generate_message (sa0, ike0, 0);
2547 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2550 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2551 clib_net_to_host_u64 (ike0->rspi));
2555 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2558 r = ikev2_retransmit_resp (sa0, ike0);
2561 vlib_node_increment_counter (vm, ikev2_node.index,
2562 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2564 len = clib_net_to_host_u32 (ike0->length);
2569 vlib_node_increment_counter (vm, ikev2_node.index,
2570 IKEV2_ERROR_IKE_REQ_IGNORE,
2575 ikev2_process_informational_req (vm, sa0, ike0);
2578 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2580 ikev2_delete_t *d, *tmp, *resp = 0;
2581 vec_foreach (d, sa0->del)
2583 ikev2_child_sa_t *ch_sa;
2584 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2586 !sa0->is_initiator);
2589 ikev2_delete_tunnel_interface (km->vnet_main,
2591 if (!sa0->is_initiator)
2593 vec_add2 (resp, tmp, 1);
2594 tmp->protocol_id = d->protocol_id;
2595 tmp->spi = ch_sa->r_proposals[0].spi;
2597 ikev2_sa_del_child_sa (sa0, ch_sa);
2600 if (!sa0->is_initiator)
2602 vec_free (sa0->del);
2607 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2609 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2610 len = ikev2_generate_message (sa0, ike0, 0);
2614 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2617 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2618 clib_net_to_host_u64 (ike0->rspi));
2622 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2625 r = ikev2_retransmit_resp (sa0, ike0);
2628 vlib_node_increment_counter (vm, ikev2_node.index,
2629 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2631 len = clib_net_to_host_u32 (ike0->length);
2636 vlib_node_increment_counter (vm, ikev2_node.index,
2637 IKEV2_ERROR_IKE_REQ_IGNORE,
2642 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2645 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2648 vec_free (sa0->childs);
2649 ikev2_child_sa_t *child;
2650 vec_add2 (sa0->childs, child, 1);
2651 child->r_proposals = sa0->rekey[0].r_proposal;
2652 child->i_proposals = sa0->rekey[0].i_proposal;
2653 child->tsi = sa0->rekey[0].tsi;
2654 child->tsr = sa0->rekey[0].tsr;
2655 ikev2_create_tunnel_interface (vm, thread_index,
2657 child - sa0->childs,
2660 if (sa0->is_initiator)
2662 vec_del1 (sa0->rekey, 0);
2666 len = ikev2_generate_message (sa0, ike0, 0);
2673 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2674 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2676 ip40->src_address.as_u32,
2677 ip40->dst_address.as_u32);
2681 /* if we are sending packet back, rewrite headers */
2684 next0 = IKEV2_NEXT_IP4_LOOKUP;
2685 if (sa0->is_initiator)
2687 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2688 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2692 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2693 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2696 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2698 b0->current_length =
2699 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2700 ip40->length = clib_host_to_net_u16 (b0->current_length);
2701 ip40->checksum = ip4_header_checksum (ip40);
2704 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2705 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2707 ikev2_child_sa_t *c;
2709 vec_foreach (c, sa0->childs)
2710 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2712 ikev2_delete_sa (sa0);
2714 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2716 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2717 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2719 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2720 t->sw_if_index = sw_if_index0;
2721 t->next_index = next0;
2724 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2725 n_left_to_next, bi0, next0);
2728 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2731 vlib_node_increment_counter (vm, ikev2_node.index,
2732 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2733 return frame->n_vectors;
2737 VLIB_REGISTER_NODE (ikev2_node,static) = {
2738 .function = ikev2_node_fn,
2740 .vector_size = sizeof (u32),
2741 .format_trace = format_ikev2_trace,
2742 .type = VLIB_NODE_TYPE_INTERNAL,
2744 .n_errors = ARRAY_LEN(ikev2_error_strings),
2745 .error_strings = ikev2_error_strings,
2747 .n_next_nodes = IKEV2_N_NEXT,
2750 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2751 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2756 // set ikev2 proposals when vpp is used as initiator
2757 static clib_error_t *
2758 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2759 ikev2_transforms_set * ts,
2760 ikev2_sa_proposal_t ** proposals, int is_ike)
2763 ikev2_main_t *km = &ikev2_main;
2764 ikev2_sa_proposal_t *proposal;
2765 vec_add2 (*proposals, proposal, 1);
2766 ikev2_sa_transform_t *td;
2771 vec_foreach (td, km->supported_transforms)
2773 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2774 && td->encr_type == ts->crypto_alg
2775 && td->key_len == ts->crypto_key_size / 8)
2778 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2779 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2780 vec_add (td->attrs, (u8 *) attr, 4);
2781 vec_add1 (proposal->transforms, *td);
2790 r = clib_error_return (0, "Unsupported algorithm");
2794 if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2798 vec_foreach (td, km->supported_transforms)
2800 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2801 && td->integ_type == ts->integ_alg)
2803 vec_add1 (proposal->transforms, *td);
2811 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2812 r = clib_error_return (0, "Unsupported algorithm");
2821 vec_foreach (td, km->supported_transforms)
2823 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2824 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2826 vec_add1 (proposal->transforms, *td);
2833 r = clib_error_return (0, "Unsupported algorithm");
2839 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2842 vec_foreach (td, km->supported_transforms)
2844 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2846 vec_add1 (proposal->transforms, *td);
2849 sa->dh_group = td->dh_type;
2857 r = clib_error_return (0, "Unsupported algorithm");
2865 vec_foreach (td, km->supported_transforms)
2867 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2869 vec_add1 (proposal->transforms, *td);
2876 r = clib_error_return (0, "Unsupported algorithm");
2885 static ikev2_profile_t *
2886 ikev2_profile_index_by_name (u8 * name)
2888 ikev2_main_t *km = &ikev2_main;
2891 p = mhash_get (&km->profile_index_by_name, name);
2895 return pool_elt_at_index (km->profiles, p[0]);
2900 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2909 b0 = vlib_get_buffer (vm, bi0);
2910 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2911 udp0 = vlib_buffer_get_current (b0);
2912 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2913 ip40 = vlib_buffer_get_current (b0);
2916 ip40->ip_version_and_header_length = 0x45;
2918 ip40->fragment_id = 0;
2919 ip40->flags_and_fragment_offset = 0;
2921 ip40->protocol = IP_PROTOCOL_UDP;
2922 ip40->dst_address.as_u32 = dst->as_u32;
2923 ip40->src_address.as_u32 = src->as_u32;
2924 udp0->dst_port = clib_host_to_net_u16 (500);
2925 udp0->src_port = clib_host_to_net_u16 (500);
2926 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2928 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2929 ip40->length = clib_host_to_net_u16 (b0->current_length);
2930 ip40->checksum = ip4_header_checksum (ip40);
2933 /* send the request */
2934 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2935 to_next = vlib_frame_vector_args (f);
2938 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2943 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2946 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2951 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2952 *ike = vlib_buffer_get_current (b0);
2957 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2959 ikev2_main_t *km = &ikev2_main;
2961 km->pkey = ikev2_load_key_file (file);
2962 if (km->pkey == NULL)
2963 return clib_error_return (0, "load key '%s' failed", file);
2968 static_always_inline vnet_api_error_t
2969 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
2971 ikev2_main_t *km = &ikev2_main;
2972 udp_dst_port_info_t *pi;
2974 uword *v = hash_get (km->udp_ports, port);
2975 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
2979 /* IKE already uses this port, only increment reference counter */
2986 return VNET_API_ERROR_UDP_PORT_TAKEN;
2988 udp_register_dst_port (km->vlib_main, port,
2989 ipsec4_tun_input_node.index, 1);
2990 hash_set (km->udp_ports, port, 1);
2996 static_always_inline void
2997 ikev2_unregister_udp_port (ikev2_profile_t * p)
2999 ikev2_main_t *km = &ikev2_main;
3002 if (p->dst_port == IPSEC_UDP_PORT_NONE)
3005 v = hash_get (km->udp_ports, p->dst_port);
3013 udp_unregister_dst_port (km->vlib_main, p->dst_port, 1);
3014 hash_unset (km->udp_ports, p->dst_port);
3017 p->dst_port = IPSEC_UDP_PORT_NONE;
3021 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3023 ikev2_main_t *km = &ikev2_main;
3028 if (ikev2_profile_index_by_name (name))
3029 return clib_error_return (0, "policy %v already exists", name);
3031 pool_get (km->profiles, p);
3032 clib_memset (p, 0, sizeof (*p));
3033 p->name = vec_dup (name);
3034 p->dst_port = IPSEC_UDP_PORT_NONE;
3035 p->responder.sw_if_index = ~0;
3037 uword index = p - km->profiles;
3038 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3042 p = ikev2_profile_index_by_name (name);
3044 return clib_error_return (0, "policy %v does not exists", name);
3046 ikev2_unregister_udp_port (p);
3049 pool_put (km->profiles, p);
3050 mhash_unset (&km->profile_index_by_name, name, 0);
3056 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3057 u8 * auth_data, u8 data_hex_format)
3062 p = ikev2_profile_index_by_name (name);
3066 r = clib_error_return (0, "unknown profile %v", name);
3069 vec_free (p->auth.data);
3070 p->auth.method = auth_method;
3071 p->auth.data = vec_dup (auth_data);
3072 p->auth.hex = data_hex_format;
3074 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3076 vec_add1 (p->auth.data, 0);
3078 EVP_PKEY_free (p->auth.key);
3079 p->auth.key = ikev2_load_cert_file (auth_data);
3080 if (p->auth.key == NULL)
3081 return clib_error_return (0, "load cert '%s' failed", auth_data);
3088 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3094 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3095 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3097 r = clib_error_return (0, "unsupported identity type %U",
3098 format_ikev2_id_type, id_type);
3102 p = ikev2_profile_index_by_name (name);
3106 r = clib_error_return (0, "unknown profile %v", name);
3112 vec_free (p->loc_id.data);
3113 p->loc_id.type = id_type;
3114 p->loc_id.data = vec_dup (data);
3118 vec_free (p->rem_id.data);
3119 p->rem_id.type = id_type;
3120 p->rem_id.data = vec_dup (data);
3127 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3128 u16 start_port, u16 end_port, ip4_address_t start_addr,
3129 ip4_address_t end_addr, int is_local)
3134 p = ikev2_profile_index_by_name (name);
3138 r = clib_error_return (0, "unknown profile %v", name);
3144 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3145 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3146 p->loc_ts.start_port = start_port;
3147 p->loc_ts.end_port = end_port;
3148 p->loc_ts.protocol_id = protocol_id;
3149 p->loc_ts.ts_type = 7;
3153 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3154 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3155 p->rem_ts.start_port = start_port;
3156 p->rem_ts.end_port = end_port;
3157 p->rem_ts.protocol_id = protocol_id;
3158 p->rem_ts.ts_type = 7;
3166 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3167 u32 sw_if_index, ip4_address_t ip4)
3172 p = ikev2_profile_index_by_name (name);
3176 r = clib_error_return (0, "unknown profile %v", name);
3180 p->responder.sw_if_index = sw_if_index;
3181 p->responder.ip4 = ip4;
3187 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3188 ikev2_transform_encr_type_t crypto_alg,
3189 ikev2_transform_integ_type_t integ_alg,
3190 ikev2_transform_dh_type_t dh_type,
3191 u32 crypto_key_size)
3196 p = ikev2_profile_index_by_name (name);
3200 r = clib_error_return (0, "unknown profile %v", name);
3204 p->ike_ts.crypto_alg = crypto_alg;
3205 p->ike_ts.integ_alg = integ_alg;
3206 p->ike_ts.dh_type = dh_type;
3207 p->ike_ts.crypto_key_size = crypto_key_size;
3212 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3213 ikev2_transform_encr_type_t crypto_alg,
3214 ikev2_transform_integ_type_t integ_alg,
3215 ikev2_transform_dh_type_t dh_type,
3216 u32 crypto_key_size)
3221 p = ikev2_profile_index_by_name (name);
3225 r = clib_error_return (0, "unknown profile %v", name);
3229 p->esp_ts.crypto_alg = crypto_alg;
3230 p->esp_ts.integ_alg = integ_alg;
3231 p->esp_ts.dh_type = dh_type;
3232 p->esp_ts.crypto_key_size = crypto_key_size;
3237 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3238 u8 * name, u32 sw_if_index)
3243 p = ikev2_profile_index_by_name (name);
3247 r = clib_error_return (0, "unknown profile %v", name);
3251 p->tun_itf = sw_if_index;
3257 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3260 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3261 ikev2_main_t *km = &ikev2_main;
3262 vnet_api_error_t rv = 0;
3266 return VNET_API_ERROR_INVALID_VALUE;
3270 if (p->dst_port != IPSEC_UDP_PORT_NONE)
3271 return VNET_API_ERROR_VALUE_EXIST;
3273 rv = ikev2_register_udp_port (p, port);
3277 v = hash_get (km->udp_ports, port);
3279 return VNET_API_ERROR_IKE_NO_PORT;
3281 if (p->dst_port == IPSEC_UDP_PORT_NONE)
3282 return VNET_API_ERROR_INVALID_VALUE;
3284 ikev2_unregister_udp_port (p);
3290 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3292 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3297 r = clib_error_return (0, "unknown profile %v", name);
3306 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3307 u64 lifetime, u32 jitter, u32 handover,
3313 p = ikev2_profile_index_by_name (name);
3317 r = clib_error_return (0, "unknown profile %v", name);
3321 p->lifetime = lifetime;
3322 p->lifetime_jitter = jitter;
3323 p->handover = handover;
3324 p->lifetime_maxdata = maxdata;
3329 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3333 ip4_main_t *im = &ip4_main;
3334 ikev2_main_t *km = &ikev2_main;
3336 p = ikev2_profile_index_by_name (name);
3340 r = clib_error_return (0, "unknown profile %v", name);
3344 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3346 r = clib_error_return (0, "responder not set for profile %v", name);
3351 /* Create the Initiator Request */
3355 ip_lookup_main_t *lm = &im->lookup_main;
3357 int len = sizeof (ike_header_t);
3359 /* Get own iface IP */
3361 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3362 ip_interface_address_t *if_add =
3363 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3364 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3366 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3368 /* Prepare the SA and the IKE payload */
3370 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3371 ikev2_payload_chain_t *chain = 0;
3372 ikev2_payload_new_chain (chain);
3374 /* Build the IKE proposal payload */
3375 ikev2_sa_proposal_t *proposals = 0;
3376 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3377 proposals[0].proposal_num = 1;
3378 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3380 /* Add and then cleanup proposal data */
3381 ikev2_payload_add_sa (chain, proposals);
3382 ikev2_sa_free_proposal_vector (&proposals);
3384 sa.is_initiator = 1;
3385 sa.profile_index = p - km->profiles;
3386 sa.is_profile_index_set = 1;
3387 sa.state = IKEV2_STATE_SA_INIT;
3388 sa.tun_itf = p->tun_itf;
3389 sa.udp_encap = p->udp_encap;
3390 sa.dst_port = p->dst_port;
3391 sa.is_tun_itf_set = 1;
3392 sa.initial_contact = 1;
3393 ikev2_generate_sa_init_data (&sa);
3394 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3395 ikev2_payload_add_nonce (chain, sa.i_nonce);
3397 /* Build the child SA proposal */
3398 vec_resize (sa.childs, 1);
3399 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3400 &sa.childs[0].i_proposals, 0);
3401 sa.childs[0].i_proposals[0].proposal_num = 1;
3402 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3403 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3404 sizeof (sa.childs[0].i_proposals[0].spi));
3408 /* Add NAT detection notification messages (mandatory) */
3409 u8 nat_detection_source[8 + 8 + 4 + 2];
3410 u8 *nat_detection_sha1 = vec_new (u8, 20);
3412 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3413 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3414 tmpspi = clib_host_to_net_u64 (sa.rspi);
3415 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3416 u16 tmpport = clib_host_to_net_u16 (500);
3417 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3419 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3420 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3421 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3422 nat_detection_sha1);
3423 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3424 nat_detection_sha1);
3425 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3426 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3427 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3428 nat_detection_sha1);
3429 ikev2_payload_add_notify (chain,
3430 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3431 nat_detection_sha1);
3432 vec_free (nat_detection_sha1);
3434 u8 *sig_hash_algo = vec_new (u8, 8);
3435 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3436 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3437 ikev2_payload_add_notify (chain,
3438 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3440 vec_free (sig_hash_algo);
3443 /* Buffer update and boilerplate */
3444 len += vec_len (chain->data);
3445 ike0->nextpayload = chain->first_payload_type;
3446 ike0->length = clib_host_to_net_u32 (len);
3447 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3448 ikev2_payload_destroy_chain (chain);
3450 ike0->version = IKE_VERSION_2;
3451 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3452 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3453 ike0->ispi = sa.ispi;
3457 /* store whole IKE payload - needed for PSK auth */
3458 vec_free (sa.last_sa_init_req_packet_data);
3459 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3461 /* add data to the SA then add it to the pool */
3462 sa.iaddr.as_u32 = if_ip->as_u32;
3463 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3464 sa.i_id.type = p->loc_id.type;
3465 sa.i_id.data = vec_dup (p->loc_id.data);
3466 sa.i_auth.method = p->auth.method;
3467 sa.i_auth.hex = p->auth.hex;
3468 sa.i_auth.data = vec_dup (p->auth.data);
3469 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3470 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3472 ikev2_initial_contact_cleanup (&sa);
3474 /* add SA to the pool */
3475 ikev2_sa_t *sa0 = 0;
3476 pool_get (km->sais, sa0);
3477 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3478 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3480 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3482 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3483 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3484 p->responder.ip4.as_u32);
3491 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3492 ikev2_child_sa_t * csa)
3494 /* Create the Initiator notification for child SA removal */
3495 ikev2_main_t *km = &ikev2_main;
3500 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3503 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3504 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3505 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3506 vec_resize (sa->del, 1);
3507 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3508 sa->del->spi = csa->i_proposals->spi;
3509 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3510 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3511 len = ikev2_generate_message (sa, ike0, 0);
3513 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3515 /* delete local child SA */
3516 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3517 ikev2_sa_del_child_sa (sa, csa);
3521 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3524 ikev2_main_t *km = &ikev2_main;
3525 ikev2_main_per_thread_data_t *tkm;
3526 ikev2_sa_t *fsa = 0;
3527 ikev2_child_sa_t *fchild = 0;
3529 /* Search for the child SA */
3530 vec_foreach (tkm, km->per_thread_data)
3536 pool_foreach (sa, tkm->sas, ({
3537 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3547 if (!fchild || !fsa)
3549 r = clib_error_return (0, "Child SA not found");
3554 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3561 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3564 ikev2_main_t *km = &ikev2_main;
3565 ikev2_main_per_thread_data_t *tkm;
3566 ikev2_sa_t *fsa = 0;
3567 ikev2_main_per_thread_data_t *ftkm = 0;
3569 /* Search for the IKE SA */
3570 vec_foreach (tkm, km->per_thread_data)
3576 pool_foreach (sa, tkm->sas, ({
3577 if (sa->ispi == ispi)
3589 r = clib_error_return (0, "IKE SA not found");
3594 /* Create the Initiator notification for IKE SA removal */
3600 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3603 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3604 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3605 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3606 vec_resize (fsa->del, 1);
3607 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3608 fsa->del->spi = ispi;
3609 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3610 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3611 len = ikev2_generate_message (fsa, ike0, 0);
3613 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3617 /* delete local SA */
3618 ikev2_child_sa_t *c;
3619 vec_foreach (c, fsa->childs)
3621 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3622 ikev2_sa_del_child_sa (fsa, c);
3624 ikev2_sa_free_all_vec (fsa);
3625 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3628 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3629 pool_put (ftkm->sas, fsa);
3637 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3638 ikev2_child_sa_t * csa)
3640 /* Create the Initiator request for create child SA */
3646 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3649 ike0->version = IKE_VERSION_2;
3650 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3651 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3652 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3653 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3654 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3655 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3657 ikev2_rekey_t *rekey;
3658 vec_add2 (sa->rekey, rekey, 1);
3659 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3662 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3663 rekey->spi = proposals[0].spi;
3664 rekey->ispi = csa->i_proposals->spi;
3665 len = ikev2_generate_message (sa, ike0, proposals);
3666 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3667 vec_free (proposals);
3671 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3674 ikev2_main_t *km = &ikev2_main;
3675 ikev2_main_per_thread_data_t *tkm;
3676 ikev2_sa_t *fsa = 0;
3677 ikev2_child_sa_t *fchild = 0;
3679 /* Search for the child SA */
3680 vec_foreach (tkm, km->per_thread_data)
3686 pool_foreach (sa, tkm->sas, ({
3687 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3697 if (!fchild || !fsa)
3699 r = clib_error_return (0, "Child SA not found");
3704 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3711 ikev2_init (vlib_main_t * vm)
3713 ikev2_main_t *km = &ikev2_main;
3714 vlib_thread_main_t *tm = vlib_get_thread_main ();
3717 clib_memset (km, 0, sizeof (ikev2_main_t));
3718 km->vnet_main = vnet_get_main ();
3721 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
3722 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
3723 ikev2_crypto_init (km);
3725 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3727 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3728 CLIB_CACHE_LINE_BYTES);
3729 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3731 km->per_thread_data[thread_id].sa_by_rspi =
3732 hash_create (0, sizeof (uword));
3735 km->sa_by_ispi = hash_create (0, sizeof (uword));
3736 km->sw_if_indices = hash_create (0, 0);
3737 km->udp_ports = hash_create (0, sizeof (uword));
3739 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3741 ikev2_cli_reference ();
3743 km->log_level = IKEV2_LOG_ERROR;
3744 km->log_class = vlib_log_register_class ("ikev2", 0);
3749 VLIB_INIT_FUNCTION (ikev2_init) =
3751 .runs_after = VLIB_INITS("ipsec_init"),
3756 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
3759 ikev2_main_t *km = &ikev2_main;
3760 ikev2_profile_t *p = 0;
3761 vlib_main_t *vm = km->vlib_main;
3762 f64 now = vlib_time_now (vm);
3765 if (sa->is_profile_index_set)
3766 p = pool_elt_at_index (km->profiles, sa->profile_index);
3768 if (sa->is_initiator && p && csa->time_to_expiration
3769 && now > csa->time_to_expiration)
3771 if (!csa->is_expired || csa->rekey_retries > 0)
3773 ikev2_rekey_child_sa_internal (vm, sa, csa);
3774 csa->time_to_expiration = now + p->handover;
3775 csa->is_expired = 1;
3776 if (csa->rekey_retries == 0)
3778 csa->rekey_retries = 5;
3780 else if (csa->rekey_retries > 0)
3782 csa->rekey_retries--;
3783 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3784 csa->i_proposals->spi, csa->rekey_retries);
3785 if (csa->rekey_retries == 0)
3787 csa->rekey_retries = -1;
3794 csa->time_to_expiration = 0;
3795 ikev2_delete_child_sa_internal (vm, sa, csa);
3802 ipip_tunnel_t *ipip = NULL;
3803 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
3804 if (~0 == sw_if_index)
3806 ip46_address_t local_ip;
3807 ip46_address_t remote_ip;
3808 if (sa->is_initiator)
3810 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
3811 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
3815 ip46_address_set_ip4 (&local_ip, &sa->raddr);
3816 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
3820 ipip_tunnel_key_t key = {
3823 .transport = IPIP_TRANSPORT_IP4,
3828 ipip = ipip_tunnel_db_find (&key);
3831 sw_if_index = ipip->sw_if_index;
3837 vec_add1 (sas_in, csa->remote_sa_id);
3838 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
3839 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
3846 ikev2_set_log_level (ikev2_log_level_t log_level)
3848 ikev2_main_t *km = &ikev2_main;
3850 if (log_level >= IKEV2_LOG_MAX)
3852 ikev2_log_error ("unknown logging level %d", log_level);
3856 km->log_level = log_level;
3861 ikev2_set_liveness_params (u32 period, u32 max_retries)
3863 ikev2_main_t *km = &ikev2_main;
3865 if (period == 0 || max_retries == 0)
3866 return clib_error_return (0, "invalid args");
3868 km->liveness_period = period;
3869 km->liveness_max_retries = max_retries;
3874 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3876 ikev2_main_t *km = &ikev2_main;
3877 vlib_main_t *vm = km->vlib_main;
3878 ikev2_main_per_thread_data_t *tkm;
3879 ikev2_sa_t *fsa = 0;
3880 ikev2_profile_t *p = 0;
3881 ikev2_child_sa_t *fchild = 0;
3882 f64 now = vlib_time_now (vm);
3883 vlib_counter_t counts;
3885 /* Search for the SA and child SA */
3886 vec_foreach (tkm, km->per_thread_data)
3892 pool_foreach (sa, tkm->sas, ({
3893 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3902 vlib_get_combined_counter (&ipsec_sa_counters,
3903 ipsec_sa->stat_index, &counts);
3905 if (fsa && fsa->is_profile_index_set)
3906 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3908 if (fchild && p && p->lifetime_maxdata)
3910 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3912 fchild->time_to_expiration = now;
3918 ikev2_process_pending_sa_init (ikev2_main_t * km)
3925 hash_foreach (ispi, sai, km->sa_by_ispi,
3927 sa = pool_elt_at_index (km->sais, sai);
3928 if (sa->init_response_received)
3932 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
3935 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
3936 clib_memcpy_fast (vlib_buffer_get_current (b),
3937 sa->last_sa_init_req_packet_data,
3938 vec_len (sa->last_sa_init_req_packet_data));
3939 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
3940 vec_len (sa->last_sa_init_req_packet_data));
3945 static vlib_node_registration_t ikev2_mngr_process_node;
3948 ikev2_send_informational_request (ikev2_sa_t * sa)
3950 ikev2_main_t *km = &ikev2_main;
3951 ip4_address_t *src, *dst;
3956 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
3958 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3959 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3960 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3961 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3962 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3963 len = ikev2_generate_message (sa, ike0, 0);
3965 if (sa->is_initiator)
3977 ikev2_send_ike (km->vlib_main, src, dst, bi0, len);
3980 static_always_inline int
3981 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
3983 ikev2_main_t *km = &ikev2_main;
3984 vlib_main_t *vm = km->vlib_main;
3986 if (!sa->sk_ai || !sa->sk_ar)
3989 if (sa->liveness_retries >= km->liveness_max_retries)
3992 f64 now = vlib_time_now (vm);
3994 if (sa->liveness_period_check < now)
3996 sa->liveness_retries++;
3997 sa->liveness_period_check = now + km->liveness_period;
3998 ikev2_send_informational_request (sa);
4004 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4007 ikev2_main_t *km = &ikev2_main;
4008 ipsec_main_t *im = &ipsec_main;
4010 ikev2_child_sa_t *c;
4016 vlib_process_wait_for_event_or_clock (vm, 1);
4017 vlib_process_get_events (vm, NULL);
4019 /* process ike child sas */
4020 ikev2_main_per_thread_data_t *tkm;
4021 vec_foreach (tkm, km->per_thread_data)
4024 u32 *to_be_deleted = 0;
4027 pool_foreach (sa, tkm->sas, ({
4028 ikev2_child_sa_t *c;
4030 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4032 sa->old_remote_id_present = 0;
4036 sa->old_id_expiration -= 1;
4038 vec_foreach (c, sa->childs)
4040 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4043 if (ikev2_mngr_process_responder_sas (sa))
4044 vec_add1 (to_be_deleted, sa - tkm->sas);
4048 vec_foreach (sai, to_be_deleted)
4050 sa = pool_elt_at_index (tkm->sas, sai[0]);
4051 if (sa->is_initiator && sa->is_profile_index_set)
4053 p = pool_elt_at_index (km->profiles, sa->profile_index);
4056 ikev2_initiate_sa_init (vm, p->name);
4060 vec_foreach (c, sa->childs)
4061 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4062 hash_unset (tkm->sa_by_rspi, sa->rspi);
4063 pool_put (tkm->sas, sa);
4067 /* process ipsec sas */
4070 pool_foreach (sa, im->sad, ({
4071 ikev2_mngr_process_ipsec_sa(sa);
4075 ikev2_process_pending_sa_init (km);
4079 vlib_process_wait_for_event_or_clock (vm, 5);
4080 vlib_process_get_events (vm, NULL);
4089 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4090 .function = ikev2_mngr_process_fn,
4091 .type = VLIB_NODE_TYPE_PROCESS,
4093 "ikev2-manager-process",
4096 VLIB_PLUGIN_REGISTER () = {
4097 .version = VPP_BUILD_VER,
4098 .description = "Internet Key Exchange (IKEv2) Protocol",
4103 * fd.io coding-style-patch-verification: ON
4106 * eval: (c-set-style "gnu")