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 ikev2_main_t ikev2_main;
34 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
36 ikev2_child_sa_t * child);
38 #define ikev2_set_state(sa, v) do { \
40 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
50 format_ikev2_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
56 s = format (s, "ikev2: sw_if_index %d, next index %d",
57 t->sw_if_index, t->next_index);
61 static vlib_node_registration_t ikev2_node;
63 #define foreach_ikev2_error \
64 _(PROCESSED, "IKEv2 packets processed") \
65 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
66 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
67 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
68 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
69 _(NOT_IKEV2, "Non IKEv2 packets received")
73 #define _(sym,str) IKEV2_ERROR_##sym,
79 static char *ikev2_error_strings[] = {
80 #define _(sym,string) string,
87 IKEV2_NEXT_IP4_LOOKUP,
88 IKEV2_NEXT_ERROR_DROP,
92 static ikev2_sa_transform_t *
93 ikev2_find_transform_data (ikev2_sa_transform_t * t)
95 ikev2_main_t *km = &ikev2_main;
96 ikev2_sa_transform_t *td;
98 vec_foreach (td, km->supported_transforms)
100 if (td->type != t->type)
103 if (td->transform_id != t->transform_id)
106 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
108 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
109 || t->attrs[1] != 14)
112 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
120 static ikev2_sa_proposal_t *
121 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
122 ikev2_protocol_id_t prot_id)
124 ikev2_sa_proposal_t *rv = 0;
125 ikev2_sa_proposal_t *proposal;
126 ikev2_sa_transform_t *transform, *new_t;
127 u8 mandatory_bitmap, optional_bitmap;
129 if (prot_id == IKEV2_PROTOCOL_IKE)
131 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
132 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
133 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
134 optional_bitmap = mandatory_bitmap;
136 else if (prot_id == IKEV2_PROTOCOL_ESP)
138 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
139 (1 << IKEV2_TRANSFORM_TYPE_ESN);
140 optional_bitmap = mandatory_bitmap |
141 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
143 else if (prot_id == IKEV2_PROTOCOL_AH)
145 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
146 (1 << IKEV2_TRANSFORM_TYPE_ESN);
147 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
152 vec_add2 (rv, proposal, 1);
154 vec_foreach (proposal, proposals)
157 if (proposal->protocol_id != prot_id)
160 vec_foreach (transform, proposal->transforms)
162 if ((1 << transform->type) & bitmap)
165 if (ikev2_find_transform_data (transform))
167 bitmap |= 1 << transform->type;
168 vec_add2 (rv->transforms, new_t, 1);
169 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
170 new_t->attrs = vec_dup (transform->attrs);
174 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
175 (bitmap & ~optional_bitmap) == 0)
177 rv->proposal_num = proposal->proposal_num;
178 rv->protocol_id = proposal->protocol_id;
179 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
184 vec_free (rv->transforms);
193 ikev2_sa_transform_t *
194 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
195 ikev2_transform_type_t type)
197 ikev2_sa_transform_t *t;
202 vec_foreach (t, p->transforms)
205 return ikev2_find_transform_data (t);
211 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
215 vec_foreach (c, sa->childs)
217 ikev2_sa_proposal_t *proposal =
218 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
219 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
227 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
229 ikev2_sa_proposal_t *p;
230 ikev2_sa_transform_t *t;
237 vec_foreach (t, p->transforms)
241 vec_free (p->transforms);
247 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
249 ikev2_sa_free_proposal_vector (&c->r_proposals);
250 ikev2_sa_free_proposal_vector (&c->i_proposals);
260 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
263 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
269 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
271 ikev2_sa_free_child_sa (child);
272 vec_del1 (sa->childs, child - sa->childs);
276 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
278 vec_free (sa->i_nonce);
279 vec_free (sa->i_dh_data);
280 vec_free (sa->dh_shared_key);
281 vec_free (sa->dh_private_key);
283 ikev2_sa_free_proposal_vector (&sa->r_proposals);
284 ikev2_sa_free_proposal_vector (&sa->i_proposals);
287 vec_free (sa->sk_ai);
288 vec_free (sa->sk_ar);
289 vec_free (sa->sk_ei);
290 vec_free (sa->sk_er);
291 vec_free (sa->sk_pi);
292 vec_free (sa->sk_pr);
294 vec_free (sa->i_id.data);
295 vec_free (sa->i_auth.data);
296 vec_free (sa->r_id.data);
297 vec_free (sa->r_auth.data);
299 EVP_PKEY_free (sa->r_auth.key);
303 ikev2_sa_free_all_child_sa (&sa->childs);
307 ikev2_delete_sa (ikev2_sa_t * sa)
309 ikev2_main_t *km = &ikev2_main;
310 u32 thread_index = vlib_get_thread_index ();
313 ikev2_sa_free_all_vec (sa);
315 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
318 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
319 pool_put (km->per_thread_data[thread_index].sas, sa);
324 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
326 ikev2_sa_transform_t *t = 0, *t2;
327 ikev2_main_t *km = &ikev2_main;
329 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
334 /* check if received DH group is on our list of supported groups */
335 vec_foreach (t2, km->supported_transforms)
337 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
346 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
350 if (sa->is_initiator)
353 RAND_bytes ((u8 *) & sa->ispi, 8);
356 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
357 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
362 RAND_bytes ((u8 *) & sa->rspi, 8);
365 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
366 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
369 /* generate dh keys */
370 ikev2_generate_dh (sa, t);
375 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
377 ikev2_sa_transform_t *t = 0, *t2;
378 ikev2_main_t *km = &ikev2_main;
381 /*move some data to the new SA */
382 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
383 sa->i_nonce = _(sai->i_nonce);
384 sa->i_dh_data = _(sai->i_dh_data);
385 sa->dh_private_key = _(sai->dh_private_key);
386 sa->iaddr.as_u32 = sai->iaddr.as_u32;
387 sa->raddr.as_u32 = sai->raddr.as_u32;
388 sa->is_initiator = sai->is_initiator;
389 sa->i_id.type = sai->i_id.type;
390 sa->profile_index = sai->profile_index;
391 sa->is_profile_index_set = sai->is_profile_index_set;
392 sa->tun_itf = sai->tun_itf;
393 sa->is_tun_itf_set = sai->is_tun_itf_set;
394 sa->i_id.data = _(sai->i_id.data);
395 sa->i_auth.method = sai->i_auth.method;
396 sa->i_auth.hex = sai->i_auth.hex;
397 sa->i_auth.data = _(sai->i_auth.data);
398 sa->i_auth.key = _(sai->i_auth.key);
399 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
400 sa->childs = _(sai->childs);
404 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
409 /* check if received DH group is on our list of supported groups */
410 vec_foreach (t2, km->supported_transforms)
412 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
421 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
426 /* generate dh keys */
427 ikev2_complete_dh (sa, t);
432 ikev2_calc_keys (ikev2_sa_t * sa)
435 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
438 u16 integ_key_len = 0;
439 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
441 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
443 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
445 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
448 integ_key_len = tr_integ->key_len;
450 vec_append (s, sa->i_nonce);
451 vec_append (s, sa->r_nonce);
452 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
454 /* Calculate S = Ni | Nr | SPIi | SPIr */
456 vec_add2 (s, tmp, 2 * sizeof (*spi));
458 spi[0] = clib_host_to_net_u64 (sa->ispi);
459 spi[1] = clib_host_to_net_u64 (sa->rspi);
461 /* calculate PRFplus */
463 int len = tr_prf->key_trunc + /* SK_d */
464 integ_key_len * 2 + /* SK_ai, SK_ar */
465 tr_encr->key_len * 2 + /* SK_ei, SK_er */
466 tr_prf->key_len * 2; /* SK_pi, SK_pr */
468 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
475 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
476 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
477 pos += tr_prf->key_trunc;
482 sa->sk_ai = vec_new (u8, integ_key_len);
483 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
484 pos += integ_key_len;
487 sa->sk_ar = vec_new (u8, integ_key_len);
488 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
489 pos += integ_key_len;
493 sa->sk_ei = vec_new (u8, tr_encr->key_len);
494 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
495 pos += tr_encr->key_len;
498 sa->sk_er = vec_new (u8, tr_encr->key_len);
499 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
500 pos += tr_encr->key_len;
503 sa->sk_pi = vec_new (u8, tr_prf->key_len);
504 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
505 pos += tr_prf->key_len;
508 sa->sk_pr = vec_new (u8, tr_prf->key_len);
509 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
510 pos += tr_prf->key_len;
516 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
519 u16 integ_key_len = 0;
522 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
524 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
526 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
528 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
531 integ_key_len = ctr_integ->key_len;
533 salt_len = sizeof (u32);
535 vec_append (s, sa->i_nonce);
536 vec_append (s, sa->r_nonce);
537 /* calculate PRFplus */
539 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
541 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
546 child->sk_ei = vec_new (u8, ctr_encr->key_len);
547 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
548 pos += ctr_encr->key_len;
553 child->sk_ai = vec_new (u8, ctr_integ->key_len);
554 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
555 pos += ctr_integ->key_len;
559 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
564 child->sk_er = vec_new (u8, ctr_encr->key_len);
565 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
566 pos += ctr_encr->key_len;
571 child->sk_ar = vec_new (u8, integ_key_len);
572 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
573 pos += integ_key_len;
577 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
587 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
591 u32 len = clib_net_to_host_u32 (ike->length);
592 u8 payload = ike->nextpayload;
594 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
596 clib_net_to_host_u64 (ike->ispi),
597 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
599 sa->ispi = clib_net_to_host_u64 (ike->ispi);
601 /* store whole IKE payload - needed for PSK auth */
602 vec_free (sa->last_sa_init_req_packet_data);
603 vec_add (sa->last_sa_init_req_packet_data, ike, len);
605 while (p < len && payload != IKEV2_PAYLOAD_NONE)
607 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
608 u32 plen = clib_net_to_host_u16 (ikep->length);
610 if (plen < sizeof (ike_payload_header_t))
613 if (payload == IKEV2_PAYLOAD_SA)
615 ikev2_sa_free_proposal_vector (&sa->i_proposals);
616 sa->i_proposals = ikev2_parse_sa_payload (ikep);
618 else if (payload == IKEV2_PAYLOAD_KE)
620 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
621 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
622 vec_free (sa->i_dh_data);
623 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
625 else if (payload == IKEV2_PAYLOAD_NONCE)
627 vec_free (sa->i_nonce);
628 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
630 else if (payload == IKEV2_PAYLOAD_NOTIFY)
632 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
635 else if (payload == IKEV2_PAYLOAD_VENDOR)
637 ikev2_parse_vendor_payload (ikep);
641 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
643 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
645 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
646 sa->unsupported_cp = payload;
651 payload = ikep->nextpayload;
655 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
659 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
663 u32 len = clib_net_to_host_u32 (ike->length);
664 u8 payload = ike->nextpayload;
666 sa->ispi = clib_net_to_host_u64 (ike->ispi);
667 sa->rspi = clib_net_to_host_u64 (ike->rspi);
669 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
670 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
673 /* store whole IKE payload - needed for PSK auth */
674 vec_free (sa->last_sa_init_res_packet_data);
675 vec_add (sa->last_sa_init_res_packet_data, ike, len);
677 while (p < len && payload != IKEV2_PAYLOAD_NONE)
679 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
680 u32 plen = clib_net_to_host_u16 (ikep->length);
682 if (plen < sizeof (ike_payload_header_t))
685 if (payload == IKEV2_PAYLOAD_SA)
687 ikev2_sa_free_proposal_vector (&sa->r_proposals);
688 sa->r_proposals = ikev2_parse_sa_payload (ikep);
691 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
693 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
696 else if (payload == IKEV2_PAYLOAD_KE)
698 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
699 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
700 vec_free (sa->r_dh_data);
701 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
703 else if (payload == IKEV2_PAYLOAD_NONCE)
705 vec_free (sa->r_nonce);
706 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
708 else if (payload == IKEV2_PAYLOAD_NOTIFY)
710 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
713 else if (payload == IKEV2_PAYLOAD_VENDOR)
715 ikev2_parse_vendor_payload (ikep);
719 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
721 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
723 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
724 sa->unsupported_cp = payload;
729 payload = ikep->nextpayload;
735 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
740 u32 len = clib_net_to_host_u32 (ike->length);
741 ike_payload_header_t *ikep = 0;
743 ikev2_sa_transform_t *tr_integ;
745 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
748 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
750 ikep = (ike_payload_header_t *) & ike->payload[p];
751 plen = clib_net_to_host_u16 (ikep->length);
753 if (plen < sizeof (*ikep))
756 if (*payload == IKEV2_PAYLOAD_SK)
758 last_payload = *payload;
762 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
764 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
766 sa->unsupported_cp = *payload;
771 *payload = ikep->nextpayload;
775 if (last_payload != IKEV2_PAYLOAD_SK)
777 ikev2_elog_error ("Last payload must be SK");
782 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
783 (u8 *) ike, len - tr_integ->key_trunc);
785 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
787 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
789 ikev2_elog_error ("message integrity check failed");
795 return ikev2_decrypt_data (sa, ikep->payload, plen);
799 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
801 ikev2_main_t *km = &ikev2_main;
805 u32 thread_index = vlib_get_thread_index ();
807 if (!sa->initial_contact)
810 /* find old IKE SAs with the same authenticated identity */
812 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
813 if (tmp->i_id.type != sa->i_id.type ||
814 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
815 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
818 if (sa->rspi != tmp->rspi)
819 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
823 for (i = 0; i < vec_len (delete); i++)
826 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
828 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
830 ikev2_delete_sa (tmp);
834 sa->initial_contact = 0;
838 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
840 ikev2_child_sa_t *first_child_sa;
842 u8 payload = ike->nextpayload;
844 ike_payload_header_t *ikep;
847 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
848 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
849 clib_host_to_net_u64 (ike->rspi),
850 sa->is_initiator ? sa->raddr.as_u32 : sa->
853 ikev2_calc_keys (sa);
855 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
859 if (sa->unsupported_cp)
860 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
861 goto cleanup_and_exit;
864 /* select or create 1st child SA */
865 if (sa->is_initiator)
867 first_child_sa = &sa->childs[0];
871 ikev2_sa_free_all_child_sa (&sa->childs);
872 vec_add2 (sa->childs, first_child_sa, 1);
876 /* process encrypted payload */
878 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
880 ikep = (ike_payload_header_t *) & plaintext[p];
881 plen = clib_net_to_host_u16 (ikep->length);
883 if (plen < sizeof (ike_payload_header_t))
884 goto cleanup_and_exit;
886 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
888 if (sa->is_initiator)
890 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
891 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
895 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
896 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
899 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
901 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
903 sa->i_id.type = id->id_type;
904 vec_free (sa->i_id.data);
905 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
907 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
909 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
911 sa->r_id.type = id->id_type;
912 vec_free (sa->r_id.data);
913 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
915 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
917 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
919 if (sa->is_initiator)
921 sa->r_auth.method = a->auth_method;
922 vec_free (sa->r_auth.data);
923 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
927 sa->i_auth.method = a->auth_method;
928 vec_free (sa->i_auth.data);
929 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
932 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
934 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
935 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
937 sa->initial_contact = 1;
941 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
943 ikev2_parse_vendor_payload (ikep);
945 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
947 vec_free (first_child_sa->tsi);
948 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
950 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
952 vec_free (first_child_sa->tsr);
953 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
957 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
960 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
962 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
963 sa->unsupported_cp = payload;
968 payload = ikep->nextpayload;
973 vec_free (plaintext);
977 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
981 u8 payload = ike->nextpayload;
983 ike_payload_header_t *ikep;
986 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
987 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
988 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
990 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
993 goto cleanup_and_exit;
995 /* process encrypted payload */
997 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
999 ikep = (ike_payload_header_t *) & plaintext[p];
1000 plen = clib_net_to_host_u16 (ikep->length);
1002 if (plen < sizeof (ike_payload_header_t))
1003 goto cleanup_and_exit;
1005 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1007 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1008 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1009 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1012 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1014 sa->del = ikev2_parse_delete_payload (ikep);
1016 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1018 ikev2_parse_vendor_payload (ikep);
1022 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1024 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1026 sa->unsupported_cp = payload;
1031 payload = ikep->nextpayload;
1036 vec_free (plaintext);
1040 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1044 u8 payload = ike->nextpayload;
1047 u8 nonce[IKEV2_NONCE_SIZE];
1049 ike_payload_header_t *ikep;
1051 ikev2_notify_t *n = 0;
1052 ikev2_ts_t *tsi = 0;
1053 ikev2_ts_t *tsr = 0;
1054 ikev2_sa_proposal_t *proposal = 0;
1055 ikev2_child_sa_t *child_sa;
1057 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1058 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1059 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1061 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1064 goto cleanup_and_exit;
1066 /* process encrypted payload */
1068 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1070 ikep = (ike_payload_header_t *) & plaintext[p];
1071 plen = clib_net_to_host_u16 (ikep->length);
1073 if (plen < sizeof (ike_payload_header_t))
1074 goto cleanup_and_exit;
1076 else if (payload == IKEV2_PAYLOAD_SA)
1078 proposal = ikev2_parse_sa_payload (ikep);
1080 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1082 n = ikev2_parse_notify_payload (ikep);
1083 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1088 else if (payload == IKEV2_PAYLOAD_DELETE)
1090 sa->del = ikev2_parse_delete_payload (ikep);
1092 else if (payload == IKEV2_PAYLOAD_VENDOR)
1094 ikev2_parse_vendor_payload (ikep);
1096 else if (payload == IKEV2_PAYLOAD_NONCE)
1098 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1100 else if (payload == IKEV2_PAYLOAD_TSI)
1102 tsi = ikev2_parse_ts_payload (ikep);
1104 else if (payload == IKEV2_PAYLOAD_TSR)
1106 tsr = ikev2_parse_ts_payload (ikep);
1110 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1112 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1114 sa->unsupported_cp = payload;
1119 payload = ikep->nextpayload;
1123 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1125 ikev2_rekey_t *rekey = &sa->rekey[0];
1126 rekey->protocol_id = proposal->protocol_id;
1128 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1129 rekey->i_proposal->spi = rekey->spi;
1130 rekey->r_proposal = proposal;
1134 vec_free (sa->r_nonce);
1135 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1136 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1139 child_sa->rekey_retries = 0;
1144 ikev2_rekey_t *rekey;
1145 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1148 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1150 goto cleanup_and_exit;
1152 vec_add2 (sa->rekey, rekey, 1);
1153 rekey->protocol_id = n->protocol_id;
1154 rekey->spi = n->spi;
1155 rekey->i_proposal = proposal;
1157 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1161 vec_free (sa->i_nonce);
1162 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1163 /* generate new Nr */
1164 vec_free (sa->r_nonce);
1165 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1166 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1170 vec_free (plaintext);
1175 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1183 ikev2_sa_transform_t *tr_prf;
1186 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1192 nonce = sa->i_nonce;
1193 packet_data = sa->last_sa_init_res_packet_data;
1199 nonce = sa->r_nonce;
1200 packet_data = sa->last_sa_init_req_packet_data;
1203 data = vec_new (u8, 4);
1205 vec_append (data, id->data);
1207 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1208 vec_append (authmsg, packet_data);
1209 vec_append (authmsg, nonce);
1210 vec_append (authmsg, id_hash);
1218 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1220 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1221 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1222 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1223 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1230 ikev2_sa_match_ts (ikev2_sa_t * sa)
1232 ikev2_main_t *km = &ikev2_main;
1234 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1238 pool_foreach (p, km->profiles, ({
1240 if (sa->is_initiator)
1254 if (p->rem_id.type != id->type ||
1255 vec_len(p->rem_id.data) != vec_len(id->data) ||
1256 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1259 vec_foreach(ts, sa->childs[0].tsi)
1261 if (ikev2_ts_cmp(p_tsi, ts))
1263 vec_add1 (tsi, ts[0]);
1268 vec_foreach(ts, sa->childs[0].tsr)
1270 if (ikev2_ts_cmp(p_tsr, ts))
1272 vec_add1 (tsr, ts[0]);
1283 vec_free (sa->childs[0].tsi);
1284 vec_free (sa->childs[0].tsr);
1285 sa->childs[0].tsi = tsi;
1286 sa->childs[0].tsr = tsr;
1292 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1297 ikev2_sa_auth (ikev2_sa_t * sa)
1299 ikev2_main_t *km = &ikev2_main;
1300 ikev2_profile_t *p, *sel_p = 0;
1301 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1302 ikev2_sa_transform_t *tr_prf;
1305 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1307 /* only shared key and rsa signature */
1308 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1309 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1311 ikev2_elog_uint (IKEV2_LOG_ERROR,
1312 "unsupported authentication method %u",
1314 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1318 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1319 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1322 ikev2_auth_t *sa_auth;
1324 if (sa->is_initiator)
1327 sa_auth = &sa->r_auth;
1332 sa_auth = &sa->i_auth;
1336 pool_foreach (p, km->profiles, ({
1339 if (p->rem_id.type != sa_id->type ||
1340 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1341 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1344 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1346 if (!p->auth.data ||
1347 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1350 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1351 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1353 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1355 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1362 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1364 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1367 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1369 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1382 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1384 if (!sa->is_initiator)
1386 vec_free (sa->r_id.data);
1387 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1388 sa->r_id.type = sel_p->loc_id.type;
1390 /* generate our auth data */
1391 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1392 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1394 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1395 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1397 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1399 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1400 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1404 /* select transforms for 1st child sa */
1405 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1406 sa->childs[0].r_proposals =
1407 ikev2_select_proposal (sa->childs[0].i_proposals,
1408 IKEV2_PROTOCOL_ESP);
1410 if (~0 != sel_p->tun_itf)
1412 sa->is_tun_itf_set = 1;
1413 sa->tun_itf = sel_p->tun_itf;
1419 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1420 "profile found! ispi %lx", sa->ispi);
1421 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1429 ikev2_sa_auth_init (ikev2_sa_t * sa)
1431 ikev2_main_t *km = &ikev2_main;
1432 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1433 ikev2_sa_transform_t *tr_prf;
1436 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1438 /* only shared key and rsa signature */
1439 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1440 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1442 ikev2_elog_uint (IKEV2_LOG_ERROR,
1443 "unsupported authentication method %u",
1445 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1449 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1450 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1451 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1452 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1455 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1457 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1458 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1460 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1462 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1463 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1473 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1475 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1479 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1481 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1491 ipsec_sa_flags_t flags;
1494 ipsec_crypto_alg_t encr_type;
1495 ipsec_integ_alg_t integ_type;
1496 ip46_address_t local_ip;
1497 ip46_address_t remote_ip;
1498 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1499 } ikev2_add_ipsec_tunnel_args_t;
1502 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1504 ikev2_main_t *km = &ikev2_main;
1508 if (~0 == a->sw_if_index)
1510 /* no tunnel associated with the SA/profile - create a new one */
1511 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1512 &a->local_ip, &a->remote_ip, 0,
1513 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1514 TUNNEL_MODE_P2P, &sw_if_index);
1516 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1518 if (hash_get (km->sw_if_indices, sw_if_index))
1519 /* interface is managed by IKE; proceed with updating SAs */
1522 hash_set1 (km->sw_if_indices, sw_if_index);
1526 sw_if_index = a->sw_if_index;
1527 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1532 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1533 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1534 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1538 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1540 IPSEC_PROTOCOL_ESP, a->encr_type,
1541 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1542 a->flags, 0, a->salt_local, &a->local_ip,
1543 &a->remote_ip, NULL);
1544 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1545 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1546 a->integ_type, &a->rem_ikey,
1547 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1548 a->salt_remote, &a->remote_ip,
1549 &a->local_ip, NULL);
1552 vec_add1 (sas_in, a->remote_sa_id);
1553 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1557 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1560 ikev2_child_sa_t * child, u32 sa_index,
1563 ikev2_main_t *km = &ikev2_main;
1564 ipsec_crypto_alg_t encr_type;
1565 ipsec_integ_alg_t integ_type;
1566 ikev2_profile_t *p = 0;
1567 ikev2_sa_transform_t *tr;
1568 ikev2_sa_proposal_t *proposals;
1570 ikev2_add_ipsec_tunnel_args_t a;
1572 clib_memset (&a, 0, sizeof (a));
1574 if (!child->r_proposals)
1576 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1580 if (sa->is_initiator)
1582 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1583 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1584 proposals = child->i_proposals;
1585 a.local_spi = child->r_proposals[0].spi;
1586 a.remote_spi = child->i_proposals[0].spi;
1590 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1591 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1592 proposals = child->r_proposals;
1593 a.local_spi = child->i_proposals[0].spi;
1594 a.remote_spi = child->r_proposals[0].spi;
1597 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1599 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1600 if (tr && tr->esn_type)
1601 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1603 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1606 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1608 switch (tr->key_len)
1611 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1614 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1617 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1620 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1625 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1628 switch (tr->key_len)
1631 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1634 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1637 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1640 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1648 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1654 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1657 a.encr_type = encr_type;
1661 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1664 switch (tr->integ_type)
1666 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1667 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1669 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1670 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1672 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1673 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1675 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1676 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1679 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1685 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1691 integ_type = IPSEC_INTEG_ALG_NONE;
1694 a.integ_type = integ_type;
1695 ikev2_calc_child_keys (sa, child);
1697 if (sa->is_initiator)
1699 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1700 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1701 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1702 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1705 a.salt_remote = child->salt_er;
1706 a.salt_local = child->salt_ei;
1711 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1712 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1713 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1714 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1717 a.salt_remote = child->salt_ei;
1718 a.salt_local = child->salt_er;
1722 if (sa->is_profile_index_set)
1723 p = pool_elt_at_index (km->profiles, sa->profile_index);
1725 if (p && p->lifetime)
1727 child->time_to_expiration =
1728 vlib_time_now (vnm->vlib_main) + p->lifetime;
1729 if (p->lifetime_jitter)
1731 // This is not much better than rand(3), which Coverity warns
1732 // is unsuitable for security applications; random_u32 is
1733 // however fast. If this perturbance to the expiration time
1734 // needs to use a better RNG then we may need to use something
1735 // like /dev/urandom which has significant overhead.
1736 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1737 rnd = random_u32 (&rnd);
1739 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1743 if (thread_index & 0xffffffc0)
1744 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1746 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1747 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1749 child->local_sa_id =
1751 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1752 child->remote_sa_id =
1754 ikev2_mk_remote_sa_id (sa_index, child_index, thread_index);
1755 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1757 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1758 (u8 *) & a, sizeof (a));
1764 ip46_address_t local_ip;
1765 ip46_address_t remote_ip;
1769 } ikev2_del_ipsec_tunnel_args_t;
1772 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1774 ikev2_main_t *km = &ikev2_main;
1775 ipip_tunnel_t *ipip = NULL;
1778 if (~0 == a->sw_if_index)
1781 ipip_tunnel_key_t key = {
1783 .dst = a->remote_ip,
1784 .transport = IPIP_TRANSPORT_IP4,
1789 ipip = ipip_tunnel_db_find (&key);
1793 sw_if_index = ipip->sw_if_index;
1794 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1801 sw_if_index = a->sw_if_index;
1802 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1805 if (~0 != sw_if_index)
1806 ipsec_tun_protect_del (sw_if_index, NULL);
1808 ipsec_sa_unlock_id (a->remote_sa_id);
1809 ipsec_sa_unlock_id (a->local_sa_id);
1812 ipip_del_tunnel (ipip->sw_if_index);
1816 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1817 ikev2_child_sa_t * child)
1819 ikev2_del_ipsec_tunnel_args_t a;
1821 clib_memset (&a, 0, sizeof (a));
1823 if (sa->is_initiator)
1825 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1826 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1830 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1831 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1834 a.remote_sa_id = child->remote_sa_id;
1835 a.local_sa_id = child->local_sa_id;
1836 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1838 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1844 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1847 ike_payload_header_t *ph;
1851 ikev2_sa_transform_t *tr_encr, *tr_integ;
1853 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1855 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1857 ikev2_payload_chain_t *chain = 0;
1858 ikev2_payload_new_chain (chain);
1860 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1862 if (sa->r_proposals == 0)
1864 ikev2_payload_add_notify (chain,
1865 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1866 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1868 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1870 u8 *data = vec_new (u8, 2);
1871 ikev2_sa_transform_t *tr_dh;
1873 ikev2_sa_get_td_for_type (sa->r_proposals,
1874 IKEV2_TRANSFORM_TYPE_DH);
1875 ASSERT (tr_dh && tr_dh->dh_type);
1877 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1878 data[1] = (tr_dh->dh_type) & 0xff;
1880 ikev2_payload_add_notify (chain,
1881 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1884 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1886 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1888 u8 *data = vec_new (u8, 1);
1890 data[0] = sa->unsupported_cp;
1891 ikev2_payload_add_notify (chain,
1892 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1898 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1899 ikev2_payload_add_sa (chain, sa->r_proposals);
1900 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1901 ikev2_payload_add_nonce (chain, sa->r_nonce);
1904 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1906 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1908 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1909 ikev2_payload_add_auth (chain, &sa->r_auth);
1910 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1911 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1912 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1914 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1916 ikev2_payload_add_notify (chain,
1917 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1919 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1921 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1923 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1925 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1926 ikev2_payload_add_auth (chain, &sa->r_auth);
1928 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1930 ikev2_payload_add_notify (chain,
1931 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1932 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1933 ikev2_payload_add_auth (chain, &sa->r_auth);
1934 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1935 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1937 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1939 u8 *data = vec_new (u8, 1);
1941 data[0] = sa->unsupported_cp;
1942 ikev2_payload_add_notify (chain,
1943 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1947 else if (sa->state == IKEV2_STATE_SA_INIT)
1949 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1950 ikev2_payload_add_auth (chain, &sa->i_auth);
1951 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1952 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1953 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1954 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
1959 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1963 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1965 /* if pending delete */
1968 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1970 if (sa->is_initiator)
1971 ikev2_payload_add_delete (chain, sa->del);
1973 /* The response to a request that deletes the IKE SA is an empty
1974 INFORMATIONAL response. */
1975 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1977 /* The response to a request that deletes ESP or AH SAs will contain
1978 delete payloads for the paired SAs going in the other direction. */
1981 ikev2_payload_add_delete (chain, sa->del);
1986 /* received N(AUTHENTICATION_FAILED) */
1987 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1989 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1992 /* received unsupported critical payload */
1993 else if (sa->unsupported_cp)
1995 u8 *data = vec_new (u8, 1);
1997 data[0] = sa->unsupported_cp;
1998 ikev2_payload_add_notify (chain,
1999 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2002 sa->unsupported_cp = 0;
2004 /* else send empty response */
2006 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2008 if (sa->is_initiator)
2011 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2012 ikev2_notify_t notify;
2013 u8 *data = vec_new (u8, 4);
2014 clib_memset (¬ify, 0, sizeof (notify));
2015 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2016 notify.spi = sa->childs[0].i_proposals->spi;
2017 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2019 ikev2_payload_add_sa (chain, proposals);
2020 ikev2_payload_add_nonce (chain, sa->i_nonce);
2021 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2022 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2023 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2032 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2033 ikev2_payload_add_nonce (chain, sa->r_nonce);
2034 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2036 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2038 vec_del1 (sa->rekey, 0);
2040 else if (sa->unsupported_cp)
2042 u8 *data = vec_new (u8, 1);
2044 data[0] = sa->unsupported_cp;
2045 ikev2_payload_add_notify (chain,
2046 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2049 sa->unsupported_cp = 0;
2053 ikev2_payload_add_notify (chain,
2054 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2061 ike->version = IKE_VERSION_2;
2062 ike->nextpayload = IKEV2_PAYLOAD_SK;
2063 tlen = sizeof (*ike);
2064 if (sa->is_initiator)
2066 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2067 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2071 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2075 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2077 tlen += vec_len (chain->data);
2078 ike->nextpayload = chain->first_payload_type;
2079 ike->length = clib_host_to_net_u32 (tlen);
2080 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2082 /* store whole IKE payload - needed for PSK auth */
2083 vec_free (sa->last_sa_init_res_packet_data);
2084 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2089 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2092 plen = sizeof (*ph);
2093 ph = (ike_payload_header_t *) & ike->payload[0];
2094 ph->nextpayload = chain->first_payload_type;
2096 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2099 /* add space for hmac */
2100 plen += tr_integ->key_trunc;
2103 /* payload and total length */
2104 ph->length = clib_host_to_net_u16 (plen);
2105 ike->length = clib_host_to_net_u32 (tlen);
2107 /* calc integrity data for whole packet except hash itself */
2109 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2110 (u8 *) ike, tlen - tr_integ->key_trunc);
2112 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2113 sizeof (*ike), integ, tr_integ->key_trunc);
2115 /* store whole IKE payload - needed for retransmit */
2116 vec_free (sa->last_res_packet_data);
2117 vec_add (sa->last_res_packet_data, ike, tlen);
2121 ikev2_payload_destroy_chain (chain);
2127 ikev2_retransmit_sa_init (ike_header_t * ike,
2128 ip4_address_t iaddr, ip4_address_t raddr)
2130 ikev2_main_t *km = &ikev2_main;
2132 u32 thread_index = vlib_get_thread_index ();
2135 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2136 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2137 sa->iaddr.as_u32 == iaddr.as_u32 &&
2138 sa->raddr.as_u32 == raddr.as_u32)
2141 u32 len = clib_net_to_host_u32(ike->length);
2142 u8 payload = ike->nextpayload;
2144 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2145 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2146 u32 plen = clib_net_to_host_u16(ikep->length);
2148 if (plen < sizeof(ike_payload_header_t))
2151 if (payload == IKEV2_PAYLOAD_NONCE)
2153 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2155 /* req is retransmit */
2156 if (sa->state == IKEV2_STATE_SA_INIT)
2159 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2160 ike->ispi = tmp->ispi;
2161 ike->rspi = tmp->rspi;
2162 ike->nextpayload = tmp->nextpayload;
2163 ike->version = tmp->version;
2164 ike->exchange = tmp->exchange;
2165 ike->flags = tmp->flags;
2166 ike->msgid = tmp->msgid;
2167 ike->length = tmp->length;
2168 clib_memcpy_fast(ike->payload, tmp->payload,
2169 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2170 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2171 "ispi %lx IKE_SA_INIT retransmit "
2172 "from %d.%d.%d.%d to %d.%d.%d.%d",
2174 raddr.as_u32, iaddr.as_u32);
2177 /* else ignore req */
2180 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2181 "ispi %lx IKE_SA_INIT ignore "
2182 "from %d.%d.%d.%d to %d.%d.%d.%d",
2184 raddr.as_u32, iaddr.as_u32);
2189 payload = ikep->nextpayload;
2196 /* req is not retransmit */
2201 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2203 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2206 if (msg_id > sa->last_msg_id)
2208 sa->last_msg_id = msg_id;
2211 /* retransmitted req */
2212 else if (msg_id == sa->last_msg_id)
2215 tmp = (ike_header_t *) sa->last_res_packet_data;
2216 ike->ispi = tmp->ispi;
2217 ike->rspi = tmp->rspi;
2218 ike->nextpayload = tmp->nextpayload;
2219 ike->version = tmp->version;
2220 ike->exchange = tmp->exchange;
2221 ike->flags = tmp->flags;
2222 ike->msgid = tmp->msgid;
2223 ike->length = tmp->length;
2224 clib_memcpy_fast (ike->payload, tmp->payload,
2225 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2226 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2227 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2230 /* old req ignore */
2233 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2234 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2241 ikev2_node_fn (vlib_main_t * vm,
2242 vlib_node_runtime_t * node, vlib_frame_t * frame)
2244 u32 n_left_from, *from, *to_next;
2245 ikev2_next_t next_index;
2246 ikev2_main_t *km = &ikev2_main;
2247 u32 thread_index = vlib_get_thread_index ();
2249 from = vlib_frame_vector_args (frame);
2250 n_left_from = frame->n_vectors;
2251 next_index = node->cached_next_index;
2253 while (n_left_from > 0)
2257 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2259 while (n_left_from > 0 && n_left_to_next > 0)
2263 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2268 ikev2_sa_t *sa0 = 0;
2269 ikev2_sa_t sa; /* temporary store for SA */
2273 /* speculatively enqueue b0 to the current next frame */
2279 n_left_to_next -= 1;
2281 b0 = vlib_get_buffer (vm, bi0);
2282 ike0 = vlib_buffer_get_current (b0);
2283 vlib_buffer_advance (b0, -sizeof (*udp0));
2284 udp0 = vlib_buffer_get_current (b0);
2285 vlib_buffer_advance (b0, -sizeof (*ip40));
2286 ip40 = vlib_buffer_get_current (b0);
2288 if (ike0->version != IKE_VERSION_2)
2290 vlib_node_increment_counter (vm, ikev2_node.index,
2291 IKEV2_ERROR_NOT_IKEV2, 1);
2295 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2298 clib_memset (sa0, 0, sizeof (*sa0));
2300 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2302 if (ike0->rspi == 0)
2304 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2305 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2307 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2311 vlib_node_increment_counter (vm, ikev2_node.index,
2312 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2314 len = clib_net_to_host_u32 (ike0->length);
2319 vlib_node_increment_counter (vm, ikev2_node.index,
2320 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2325 ikev2_process_sa_init_req (vm, sa0, ike0);
2327 if (sa0->state == IKEV2_STATE_SA_INIT)
2329 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2331 ikev2_select_proposal (sa0->i_proposals,
2332 IKEV2_PROTOCOL_IKE);
2333 ikev2_generate_sa_init_data (sa0);
2336 if (sa0->state == IKEV2_STATE_SA_INIT
2337 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2339 len = ikev2_generate_message (sa0, ike0, 0);
2342 if (sa0->state == IKEV2_STATE_SA_INIT)
2344 /* add SA to the pool */
2345 pool_get (km->per_thread_data[thread_index].sas,
2347 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2349 per_thread_data[thread_index].sa_by_rspi,
2352 km->per_thread_data[thread_index].sas);
2356 ikev2_sa_free_all_vec (sa0);
2360 else //received sa_init without initiator flag
2362 ikev2_process_sa_init_resp (vm, sa0, ike0);
2364 if (sa0->state == IKEV2_STATE_SA_INIT)
2366 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2367 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2371 pool_elt_at_index (km->sais, p[0]);
2373 ikev2_complete_sa_data (sa0, sai);
2374 ikev2_calc_keys (sa0);
2375 ikev2_sa_auth_init (sa0);
2376 len = ikev2_generate_message (sa0, ike0, 0);
2380 if (sa0->state == IKEV2_STATE_SA_INIT)
2382 /* add SA to the pool */
2383 pool_get (km->per_thread_data[thread_index].sas, sa0);
2384 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2385 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2387 sa0 - km->per_thread_data[thread_index].sas);
2391 ikev2_sa_free_all_vec (sa0);
2395 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2398 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2399 clib_net_to_host_u64 (ike0->rspi));
2403 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2406 r = ikev2_retransmit_resp (sa0, ike0);
2409 vlib_node_increment_counter (vm, ikev2_node.index,
2410 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2412 len = clib_net_to_host_u32 (ike0->length);
2417 vlib_node_increment_counter (vm, ikev2_node.index,
2418 IKEV2_ERROR_IKE_REQ_IGNORE,
2423 ikev2_process_auth_req (vm, sa0, ike0);
2424 ikev2_sa_auth (sa0);
2425 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2427 ikev2_initial_contact_cleanup (sa0);
2428 ikev2_sa_match_ts (sa0);
2429 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2430 ikev2_create_tunnel_interface (km->vnet_main,
2436 if (sa0->is_initiator)
2438 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2442 pool_elt_at_index (km->sais, p[0]);
2443 hash_unset (km->sa_by_ispi, sai->ispi);
2444 ikev2_sa_free_all_vec (sai);
2445 pool_put (km->sais, sai);
2450 len = ikev2_generate_message (sa0, ike0, 0);
2454 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2457 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2458 clib_net_to_host_u64 (ike0->rspi));
2462 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2465 r = ikev2_retransmit_resp (sa0, ike0);
2468 vlib_node_increment_counter (vm, ikev2_node.index,
2469 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2471 len = clib_net_to_host_u32 (ike0->length);
2476 vlib_node_increment_counter (vm, ikev2_node.index,
2477 IKEV2_ERROR_IKE_REQ_IGNORE,
2482 ikev2_process_informational_req (vm, sa0, ike0);
2485 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2487 ikev2_delete_t *d, *tmp, *resp = 0;
2488 vec_foreach (d, sa0->del)
2490 ikev2_child_sa_t *ch_sa;
2491 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2493 !sa0->is_initiator);
2496 ikev2_delete_tunnel_interface (km->vnet_main,
2498 if (!sa0->is_initiator)
2500 vec_add2 (resp, tmp, 1);
2501 tmp->protocol_id = d->protocol_id;
2502 tmp->spi = ch_sa->r_proposals[0].spi;
2504 ikev2_sa_del_child_sa (sa0, ch_sa);
2507 if (!sa0->is_initiator)
2509 vec_free (sa0->del);
2514 if (!sa0->is_initiator)
2516 len = ikev2_generate_message (sa0, ike0, 0);
2520 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2523 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2524 clib_net_to_host_u64 (ike0->rspi));
2528 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2531 r = ikev2_retransmit_resp (sa0, ike0);
2534 vlib_node_increment_counter (vm, ikev2_node.index,
2535 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2537 len = clib_net_to_host_u32 (ike0->length);
2542 vlib_node_increment_counter (vm, ikev2_node.index,
2543 IKEV2_ERROR_IKE_REQ_IGNORE,
2548 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2551 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2554 vec_free (sa0->childs);
2555 ikev2_child_sa_t *child;
2556 vec_add2 (sa0->childs, child, 1);
2557 child->r_proposals = sa0->rekey[0].r_proposal;
2558 child->i_proposals = sa0->rekey[0].i_proposal;
2559 child->tsi = sa0->rekey[0].tsi;
2560 child->tsr = sa0->rekey[0].tsr;
2561 ikev2_create_tunnel_interface (km->vnet_main,
2564 child - sa0->childs);
2566 if (sa0->is_initiator)
2568 vec_del1 (sa0->rekey, 0);
2572 len = ikev2_generate_message (sa0, ike0, 0);
2579 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2580 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2582 ip40->src_address.as_u32,
2583 ip40->dst_address.as_u32);
2587 /* if we are sending packet back, rewrite headers */
2590 next0 = IKEV2_NEXT_IP4_LOOKUP;
2591 if (sa0->is_initiator)
2593 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2594 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2598 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2599 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2602 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2604 b0->current_length =
2605 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2606 ip40->length = clib_host_to_net_u16 (b0->current_length);
2607 ip40->checksum = ip4_header_checksum (ip40);
2610 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2611 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2613 ikev2_child_sa_t *c;
2615 vec_foreach (c, sa0->childs)
2616 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2618 ikev2_delete_sa (sa0);
2620 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2622 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2623 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2625 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2626 t->sw_if_index = sw_if_index0;
2627 t->next_index = next0;
2630 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2631 n_left_to_next, bi0, next0);
2634 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2637 vlib_node_increment_counter (vm, ikev2_node.index,
2638 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2639 return frame->n_vectors;
2643 VLIB_REGISTER_NODE (ikev2_node,static) = {
2644 .function = ikev2_node_fn,
2646 .vector_size = sizeof (u32),
2647 .format_trace = format_ikev2_trace,
2648 .type = VLIB_NODE_TYPE_INTERNAL,
2650 .n_errors = ARRAY_LEN(ikev2_error_strings),
2651 .error_strings = ikev2_error_strings,
2653 .n_next_nodes = IKEV2_N_NEXT,
2656 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2657 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2662 // set ikev2 proposals when vpp is used as initiator
2663 static clib_error_t *
2664 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2665 ikev2_transforms_set * ts,
2666 ikev2_sa_proposal_t ** proposals, int is_ike)
2669 ikev2_main_t *km = &ikev2_main;
2670 ikev2_sa_proposal_t *proposal;
2671 vec_add2 (*proposals, proposal, 1);
2672 ikev2_sa_transform_t *td;
2677 vec_foreach (td, km->supported_transforms)
2679 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2680 && td->encr_type == ts->crypto_alg
2681 && td->key_len == ts->crypto_key_size / 8)
2684 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2685 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2686 vec_add (td->attrs, (u8 *) attr, 4);
2687 vec_add1 (proposal->transforms, *td);
2696 r = clib_error_return (0, "Unsupported algorithm");
2702 vec_foreach (td, km->supported_transforms)
2704 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2705 && td->integ_type == ts->integ_alg)
2707 vec_add1 (proposal->transforms, *td);
2715 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2716 r = clib_error_return (0, "Unsupported algorithm");
2724 vec_foreach (td, km->supported_transforms)
2726 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2727 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2729 vec_add1 (proposal->transforms, *td);
2736 r = clib_error_return (0, "Unsupported algorithm");
2742 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2745 vec_foreach (td, km->supported_transforms)
2747 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2749 vec_add1 (proposal->transforms, *td);
2752 sa->dh_group = td->dh_type;
2760 r = clib_error_return (0, "Unsupported algorithm");
2768 vec_foreach (td, km->supported_transforms)
2770 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2772 vec_add1 (proposal->transforms, *td);
2779 r = clib_error_return (0, "Unsupported algorithm");
2788 static ikev2_profile_t *
2789 ikev2_profile_index_by_name (u8 * name)
2791 ikev2_main_t *km = &ikev2_main;
2794 p = mhash_get (&km->profile_index_by_name, name);
2798 return pool_elt_at_index (km->profiles, p[0]);
2803 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2812 b0 = vlib_get_buffer (vm, bi0);
2813 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2814 udp0 = vlib_buffer_get_current (b0);
2815 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2816 ip40 = vlib_buffer_get_current (b0);
2819 ip40->ip_version_and_header_length = 0x45;
2821 ip40->fragment_id = 0;
2822 ip40->flags_and_fragment_offset = 0;
2824 ip40->protocol = IP_PROTOCOL_UDP;
2825 ip40->dst_address.as_u32 = dst->as_u32;
2826 ip40->src_address.as_u32 = src->as_u32;
2827 udp0->dst_port = clib_host_to_net_u16 (500);
2828 udp0->src_port = clib_host_to_net_u16 (500);
2829 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2831 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2832 ip40->length = clib_host_to_net_u16 (b0->current_length);
2833 ip40->checksum = ip4_header_checksum (ip40);
2836 /* send the request */
2837 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2838 to_next = vlib_frame_vector_args (f);
2841 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2846 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2849 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2854 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2855 *ike = vlib_buffer_get_current (b0);
2860 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2862 ikev2_main_t *km = &ikev2_main;
2864 km->pkey = ikev2_load_key_file (file);
2865 if (km->pkey == NULL)
2866 return clib_error_return (0, "load key '%s' failed", file);
2872 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2874 ikev2_main_t *km = &ikev2_main;
2879 if (ikev2_profile_index_by_name (name))
2880 return clib_error_return (0, "policy %v already exists", name);
2882 pool_get (km->profiles, p);
2883 clib_memset (p, 0, sizeof (*p));
2884 p->name = vec_dup (name);
2885 p->responder.sw_if_index = ~0;
2887 uword index = p - km->profiles;
2888 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2892 p = ikev2_profile_index_by_name (name);
2894 return clib_error_return (0, "policy %v does not exists", name);
2897 pool_put (km->profiles, p);
2898 mhash_unset (&km->profile_index_by_name, name, 0);
2904 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2905 u8 * auth_data, u8 data_hex_format)
2910 p = ikev2_profile_index_by_name (name);
2914 r = clib_error_return (0, "unknown profile %v", name);
2917 vec_free (p->auth.data);
2918 p->auth.method = auth_method;
2919 p->auth.data = vec_dup (auth_data);
2920 p->auth.hex = data_hex_format;
2922 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2924 vec_add1 (p->auth.data, 0);
2926 EVP_PKEY_free (p->auth.key);
2927 p->auth.key = ikev2_load_cert_file (auth_data);
2928 if (p->auth.key == NULL)
2929 return clib_error_return (0, "load cert '%s' failed", auth_data);
2936 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2942 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2943 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2945 r = clib_error_return (0, "unsupported identity type %U",
2946 format_ikev2_id_type, id_type);
2950 p = ikev2_profile_index_by_name (name);
2954 r = clib_error_return (0, "unknown profile %v", name);
2960 vec_free (p->loc_id.data);
2961 p->loc_id.type = id_type;
2962 p->loc_id.data = vec_dup (data);
2966 vec_free (p->rem_id.data);
2967 p->rem_id.type = id_type;
2968 p->rem_id.data = vec_dup (data);
2975 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2976 u16 start_port, u16 end_port, ip4_address_t start_addr,
2977 ip4_address_t end_addr, int is_local)
2982 p = ikev2_profile_index_by_name (name);
2986 r = clib_error_return (0, "unknown profile %v", name);
2992 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2993 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2994 p->loc_ts.start_port = start_port;
2995 p->loc_ts.end_port = end_port;
2996 p->loc_ts.protocol_id = protocol_id;
2997 p->loc_ts.ts_type = 7;
3001 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3002 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3003 p->rem_ts.start_port = start_port;
3004 p->rem_ts.end_port = end_port;
3005 p->rem_ts.protocol_id = protocol_id;
3006 p->rem_ts.ts_type = 7;
3014 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3015 u32 sw_if_index, ip4_address_t ip4)
3020 p = ikev2_profile_index_by_name (name);
3024 r = clib_error_return (0, "unknown profile %v", name);
3028 p->responder.sw_if_index = sw_if_index;
3029 p->responder.ip4 = ip4;
3035 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3036 ikev2_transform_encr_type_t crypto_alg,
3037 ikev2_transform_integ_type_t integ_alg,
3038 ikev2_transform_dh_type_t dh_type,
3039 u32 crypto_key_size)
3044 p = ikev2_profile_index_by_name (name);
3048 r = clib_error_return (0, "unknown profile %v", name);
3052 p->ike_ts.crypto_alg = crypto_alg;
3053 p->ike_ts.integ_alg = integ_alg;
3054 p->ike_ts.dh_type = dh_type;
3055 p->ike_ts.crypto_key_size = crypto_key_size;
3060 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3061 ikev2_transform_encr_type_t crypto_alg,
3062 ikev2_transform_integ_type_t integ_alg,
3063 ikev2_transform_dh_type_t dh_type,
3064 u32 crypto_key_size)
3069 p = ikev2_profile_index_by_name (name);
3073 r = clib_error_return (0, "unknown profile %v", name);
3077 p->esp_ts.crypto_alg = crypto_alg;
3078 p->esp_ts.integ_alg = integ_alg;
3079 p->esp_ts.dh_type = dh_type;
3080 p->esp_ts.crypto_key_size = crypto_key_size;
3085 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3086 u8 * name, u32 sw_if_index)
3091 p = ikev2_profile_index_by_name (name);
3095 r = clib_error_return (0, "unknown profile %v", name);
3099 p->tun_itf = sw_if_index;
3105 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3106 u64 lifetime, u32 jitter, u32 handover,
3112 p = ikev2_profile_index_by_name (name);
3116 r = clib_error_return (0, "unknown profile %v", name);
3120 p->lifetime = lifetime;
3121 p->lifetime_jitter = jitter;
3122 p->handover = handover;
3123 p->lifetime_maxdata = maxdata;
3128 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3132 ip4_main_t *im = &ip4_main;
3133 ikev2_main_t *km = &ikev2_main;
3135 p = ikev2_profile_index_by_name (name);
3139 r = clib_error_return (0, "unknown profile %v", name);
3143 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3145 r = clib_error_return (0, "responder not set for profile %v", name);
3150 /* Create the Initiator Request */
3154 ip_lookup_main_t *lm = &im->lookup_main;
3156 int len = sizeof (ike_header_t);
3158 /* Get own iface IP */
3160 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3161 ip_interface_address_t *if_add =
3162 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3163 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3165 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3167 /* Prepare the SA and the IKE payload */
3169 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3170 ikev2_payload_chain_t *chain = 0;
3171 ikev2_payload_new_chain (chain);
3173 /* Build the IKE proposal payload */
3174 ikev2_sa_proposal_t *proposals = 0;
3175 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3176 proposals[0].proposal_num = 1;
3177 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3179 /* Add and then cleanup proposal data */
3180 ikev2_payload_add_sa (chain, proposals);
3181 ikev2_sa_free_proposal_vector (&proposals);
3183 sa.is_initiator = 1;
3184 sa.profile_index = km->profiles - p;
3185 sa.is_profile_index_set = 1;
3186 sa.state = IKEV2_STATE_SA_INIT;
3187 sa.tun_itf = p->tun_itf;
3188 sa.is_tun_itf_set = 1;
3189 sa.initial_contact = 1;
3190 ikev2_generate_sa_init_data (&sa);
3191 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3192 ikev2_payload_add_nonce (chain, sa.i_nonce);
3194 /* Build the child SA proposal */
3195 vec_resize (sa.childs, 1);
3196 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3197 &sa.childs[0].i_proposals, 0);
3198 sa.childs[0].i_proposals[0].proposal_num = 1;
3199 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3200 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3201 sizeof (sa.childs[0].i_proposals[0].spi));
3205 /* Add NAT detection notification messages (mandatory) */
3206 u8 nat_detection_source[8 + 8 + 4 + 2];
3207 u8 *nat_detection_sha1 = vec_new (u8, 20);
3209 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3210 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3211 tmpspi = clib_host_to_net_u64 (sa.rspi);
3212 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3213 u16 tmpport = clib_host_to_net_u16 (500);
3214 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3216 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3217 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3218 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3219 nat_detection_sha1);
3220 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3221 nat_detection_sha1);
3222 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3223 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3224 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3225 nat_detection_sha1);
3226 ikev2_payload_add_notify (chain,
3227 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3228 nat_detection_sha1);
3229 vec_free (nat_detection_sha1);
3231 u8 *sig_hash_algo = vec_new (u8, 8);
3232 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3233 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3234 ikev2_payload_add_notify (chain,
3235 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3237 vec_free (sig_hash_algo);
3240 /* Buffer update and boilerplate */
3241 len += vec_len (chain->data);
3242 ike0->nextpayload = chain->first_payload_type;
3243 ike0->length = clib_host_to_net_u32 (len);
3244 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3245 ikev2_payload_destroy_chain (chain);
3247 ike0->version = IKE_VERSION_2;
3248 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3249 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3250 ike0->ispi = sa.ispi;
3254 /* store whole IKE payload - needed for PSK auth */
3255 vec_free (sa.last_sa_init_req_packet_data);
3256 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3258 /* add data to the SA then add it to the pool */
3259 sa.iaddr.as_u32 = if_ip->as_u32;
3260 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3261 sa.i_id.type = p->loc_id.type;
3262 sa.i_id.data = vec_dup (p->loc_id.data);
3263 sa.i_auth.method = p->auth.method;
3264 sa.i_auth.hex = p->auth.hex;
3265 sa.i_auth.data = vec_dup (p->auth.data);
3266 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3267 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3269 ikev2_initial_contact_cleanup (&sa);
3271 /* add SA to the pool */
3272 ikev2_sa_t *sa0 = 0;
3273 pool_get (km->sais, sa0);
3274 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3275 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3277 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3279 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3280 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3281 p->responder.ip4.as_u32);
3288 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3289 ikev2_child_sa_t * csa)
3291 /* Create the Initiator notification for child SA removal */
3292 ikev2_main_t *km = &ikev2_main;
3297 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3300 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3301 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3302 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3303 vec_resize (sa->del, 1);
3304 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3305 sa->del->spi = csa->i_proposals->spi;
3306 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3307 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3308 len = ikev2_generate_message (sa, ike0, 0);
3310 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3312 /* delete local child SA */
3313 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3314 ikev2_sa_del_child_sa (sa, csa);
3318 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3321 ikev2_main_t *km = &ikev2_main;
3322 ikev2_main_per_thread_data_t *tkm;
3323 ikev2_sa_t *fsa = 0;
3324 ikev2_child_sa_t *fchild = 0;
3326 /* Search for the child SA */
3327 vec_foreach (tkm, km->per_thread_data)
3333 pool_foreach (sa, tkm->sas, ({
3334 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3344 if (!fchild || !fsa)
3346 r = clib_error_return (0, "Child SA not found");
3351 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3358 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3361 ikev2_main_t *km = &ikev2_main;
3362 ikev2_main_per_thread_data_t *tkm;
3363 ikev2_sa_t *fsa = 0;
3364 ikev2_main_per_thread_data_t *ftkm = 0;
3366 /* Search for the IKE SA */
3367 vec_foreach (tkm, km->per_thread_data)
3373 pool_foreach (sa, tkm->sas, ({
3374 if (sa->ispi == ispi)
3386 r = clib_error_return (0, "IKE SA not found");
3391 /* Create the Initiator notification for IKE SA removal */
3397 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3400 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3401 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3402 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3403 vec_resize (fsa->del, 1);
3404 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3405 fsa->del->spi = ispi;
3406 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3407 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3408 len = ikev2_generate_message (fsa, ike0, 0);
3410 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3414 /* delete local SA */
3415 ikev2_child_sa_t *c;
3416 vec_foreach (c, fsa->childs)
3418 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3419 ikev2_sa_del_child_sa (fsa, c);
3421 ikev2_sa_free_all_vec (fsa);
3422 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3425 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3426 pool_put (ftkm->sas, fsa);
3434 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3435 ikev2_child_sa_t * csa)
3437 /* Create the Initiator request for create child SA */
3443 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3446 ike0->version = IKE_VERSION_2;
3447 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3448 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3449 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3450 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3451 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3452 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3454 ikev2_rekey_t *rekey;
3455 vec_add2 (sa->rekey, rekey, 1);
3456 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3459 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3460 rekey->spi = proposals[0].spi;
3461 rekey->ispi = csa->i_proposals->spi;
3462 len = ikev2_generate_message (sa, ike0, proposals);
3463 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3464 vec_free (proposals);
3468 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3471 ikev2_main_t *km = &ikev2_main;
3472 ikev2_main_per_thread_data_t *tkm;
3473 ikev2_sa_t *fsa = 0;
3474 ikev2_child_sa_t *fchild = 0;
3476 /* Search for the child SA */
3477 vec_foreach (tkm, km->per_thread_data)
3483 pool_foreach (sa, tkm->sas, ({
3484 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3494 if (!fchild || !fsa)
3496 r = clib_error_return (0, "Child SA not found");
3501 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3508 ikev2_init (vlib_main_t * vm)
3510 ikev2_main_t *km = &ikev2_main;
3511 vlib_thread_main_t *tm = vlib_get_thread_main ();
3514 clib_memset (km, 0, sizeof (ikev2_main_t));
3515 km->vnet_main = vnet_get_main ();
3518 ikev2_crypto_init (km);
3520 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3522 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3523 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3525 km->per_thread_data[thread_id].sa_by_rspi =
3526 hash_create (0, sizeof (uword));
3529 km->sa_by_ispi = hash_create (0, sizeof (uword));
3530 km->sw_if_indices = hash_create (0, 0);
3532 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3534 ikev2_cli_reference ();
3536 km->log_level = IKEV2_LOG_ERROR;
3537 km->log_class = vlib_log_register_class ("ikev2", 0);
3542 VLIB_INIT_FUNCTION (ikev2_init) =
3544 .runs_after = VLIB_INITS("ipsec_init"),
3550 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3552 ikev2_main_t *km = &ikev2_main;
3553 ikev2_profile_t *p = 0;
3554 vlib_main_t *vm = km->vlib_main;
3555 f64 now = vlib_time_now (vm);
3558 if (sa->is_profile_index_set)
3559 p = pool_elt_at_index (km->profiles, sa->profile_index);
3561 if (sa->is_initiator && p && csa->time_to_expiration
3562 && now > csa->time_to_expiration)
3564 if (!csa->is_expired || csa->rekey_retries > 0)
3566 ikev2_rekey_child_sa_internal (vm, sa, csa);
3567 csa->time_to_expiration = now + p->handover;
3568 csa->is_expired = 1;
3569 if (csa->rekey_retries == 0)
3571 csa->rekey_retries = 5;
3573 else if (csa->rekey_retries > 0)
3575 csa->rekey_retries--;
3576 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3577 csa->i_proposals->spi, csa->rekey_retries);
3578 if (csa->rekey_retries == 0)
3580 csa->rekey_retries = -1;
3587 csa->time_to_expiration = 0;
3588 ikev2_delete_child_sa_internal (vm, sa, csa);
3597 ikev2_set_log_level (ikev2_log_level_t log_level)
3599 ikev2_main_t *km = &ikev2_main;
3601 if (log_level >= IKEV2_LOG_MAX)
3603 ikev2_log_error ("unknown logging level %d", log_level);
3607 km->log_level = log_level;
3612 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3614 ikev2_main_t *km = &ikev2_main;
3615 vlib_main_t *vm = km->vlib_main;
3616 ikev2_main_per_thread_data_t *tkm;
3617 ikev2_sa_t *fsa = 0;
3618 ikev2_profile_t *p = 0;
3619 ikev2_child_sa_t *fchild = 0;
3620 f64 now = vlib_time_now (vm);
3621 vlib_counter_t counts;
3623 /* Search for the SA and child SA */
3624 vec_foreach (tkm, km->per_thread_data)
3630 pool_foreach (sa, tkm->sas, ({
3631 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3640 vlib_get_combined_counter (&ipsec_sa_counters,
3641 ipsec_sa->stat_index, &counts);
3643 if (fsa && fsa->is_profile_index_set)
3644 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3646 if (fchild && p && p->lifetime_maxdata)
3648 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3650 fchild->time_to_expiration = now;
3655 static vlib_node_registration_t ikev2_mngr_process_node;
3658 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3661 ikev2_main_t *km = &ikev2_main;
3662 ipsec_main_t *im = &ipsec_main;
3667 vlib_process_wait_for_event_or_clock (vm, 1);
3668 vlib_process_get_events (vm, NULL);
3670 /* process ike child sas */
3671 ikev2_main_per_thread_data_t *tkm;
3672 vec_foreach (tkm, km->per_thread_data)
3676 pool_foreach (sa, tkm->sas, ({
3677 ikev2_child_sa_t *c;
3678 vec_foreach (c, sa->childs)
3680 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3686 /* process ipsec sas */
3689 pool_foreach (sa, im->sad, ({
3690 ikev2_mngr_process_ipsec_sa(sa);
3696 vlib_process_wait_for_event_or_clock (vm, 5);
3697 vlib_process_get_events (vm, NULL);
3706 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3707 .function = ikev2_mngr_process_fn,
3708 .type = VLIB_NODE_TYPE_PROCESS,
3710 "ikev2-manager-process",
3713 VLIB_PLUGIN_REGISTER () = {
3714 .version = VPP_BUILD_VER,
3715 .description = "Internet Key Exchange (IKEv2) Protocol",
3720 * fd.io coding-style-patch-verification: ON
3723 * eval: (c-set-style "gnu")