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;
836 km->log_level = IKEV2_LOG_ERROR;
837 km->log_class = vlib_log_register_class ("ikev2", 0);
841 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
843 ikev2_child_sa_t *first_child_sa;
845 u8 payload = ike->nextpayload;
847 ike_payload_header_t *ikep;
850 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
851 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
852 clib_host_to_net_u64 (ike->rspi),
853 sa->is_initiator ? sa->raddr.as_u32 : sa->
856 ikev2_calc_keys (sa);
858 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
862 if (sa->unsupported_cp)
863 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
864 goto cleanup_and_exit;
867 /* select or create 1st child SA */
868 if (sa->is_initiator)
870 first_child_sa = &sa->childs[0];
874 ikev2_sa_free_all_child_sa (&sa->childs);
875 vec_add2 (sa->childs, first_child_sa, 1);
879 /* process encrypted payload */
881 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
883 ikep = (ike_payload_header_t *) & plaintext[p];
884 plen = clib_net_to_host_u16 (ikep->length);
886 if (plen < sizeof (ike_payload_header_t))
887 goto cleanup_and_exit;
889 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
891 if (sa->is_initiator)
893 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
894 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
898 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
899 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
902 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
904 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
906 sa->i_id.type = id->id_type;
907 vec_free (sa->i_id.data);
908 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
910 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
912 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
914 sa->r_id.type = id->id_type;
915 vec_free (sa->r_id.data);
916 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
918 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
920 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
922 if (sa->is_initiator)
924 sa->r_auth.method = a->auth_method;
925 vec_free (sa->r_auth.data);
926 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
930 sa->i_auth.method = a->auth_method;
931 vec_free (sa->i_auth.data);
932 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
935 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
937 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
938 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
940 sa->initial_contact = 1;
944 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
946 ikev2_parse_vendor_payload (ikep);
948 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
950 vec_free (first_child_sa->tsi);
951 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
953 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
955 vec_free (first_child_sa->tsr);
956 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
960 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
963 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
965 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
966 sa->unsupported_cp = payload;
971 payload = ikep->nextpayload;
976 vec_free (plaintext);
980 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
984 u8 payload = ike->nextpayload;
986 ike_payload_header_t *ikep;
989 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
990 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
991 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
993 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
996 goto cleanup_and_exit;
998 /* process encrypted payload */
1000 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1002 ikep = (ike_payload_header_t *) & plaintext[p];
1003 plen = clib_net_to_host_u16 (ikep->length);
1005 if (plen < sizeof (ike_payload_header_t))
1006 goto cleanup_and_exit;
1008 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1010 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1011 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1012 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1015 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1017 sa->del = ikev2_parse_delete_payload (ikep);
1019 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1021 ikev2_parse_vendor_payload (ikep);
1025 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1027 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1029 sa->unsupported_cp = payload;
1034 payload = ikep->nextpayload;
1039 vec_free (plaintext);
1043 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1047 u8 payload = ike->nextpayload;
1050 u8 nonce[IKEV2_NONCE_SIZE];
1052 ike_payload_header_t *ikep;
1054 ikev2_notify_t *n = 0;
1055 ikev2_ts_t *tsi = 0;
1056 ikev2_ts_t *tsr = 0;
1057 ikev2_sa_proposal_t *proposal = 0;
1058 ikev2_child_sa_t *child_sa;
1060 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1061 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1062 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1064 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1067 goto cleanup_and_exit;
1069 /* process encrypted payload */
1071 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1073 ikep = (ike_payload_header_t *) & plaintext[p];
1074 plen = clib_net_to_host_u16 (ikep->length);
1076 if (plen < sizeof (ike_payload_header_t))
1077 goto cleanup_and_exit;
1079 else if (payload == IKEV2_PAYLOAD_SA)
1081 proposal = ikev2_parse_sa_payload (ikep);
1083 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1085 n = ikev2_parse_notify_payload (ikep);
1086 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1091 else if (payload == IKEV2_PAYLOAD_DELETE)
1093 sa->del = ikev2_parse_delete_payload (ikep);
1095 else if (payload == IKEV2_PAYLOAD_VENDOR)
1097 ikev2_parse_vendor_payload (ikep);
1099 else if (payload == IKEV2_PAYLOAD_NONCE)
1101 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1103 else if (payload == IKEV2_PAYLOAD_TSI)
1105 tsi = ikev2_parse_ts_payload (ikep);
1107 else if (payload == IKEV2_PAYLOAD_TSR)
1109 tsr = ikev2_parse_ts_payload (ikep);
1113 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1115 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1117 sa->unsupported_cp = payload;
1122 payload = ikep->nextpayload;
1126 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1128 ikev2_rekey_t *rekey = &sa->rekey[0];
1129 rekey->protocol_id = proposal->protocol_id;
1131 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1132 rekey->i_proposal->spi = rekey->spi;
1133 rekey->r_proposal = proposal;
1137 vec_free (sa->r_nonce);
1138 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1139 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1142 child_sa->rekey_retries = 0;
1147 ikev2_rekey_t *rekey;
1148 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1151 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1153 goto cleanup_and_exit;
1155 vec_add2 (sa->rekey, rekey, 1);
1156 rekey->protocol_id = n->protocol_id;
1157 rekey->spi = n->spi;
1158 rekey->i_proposal = proposal;
1160 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1164 vec_free (sa->i_nonce);
1165 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1166 /* generate new Nr */
1167 vec_free (sa->r_nonce);
1168 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1169 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1173 vec_free (plaintext);
1178 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1186 ikev2_sa_transform_t *tr_prf;
1189 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1195 nonce = sa->i_nonce;
1196 packet_data = sa->last_sa_init_res_packet_data;
1202 nonce = sa->r_nonce;
1203 packet_data = sa->last_sa_init_req_packet_data;
1206 data = vec_new (u8, 4);
1208 vec_append (data, id->data);
1210 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1211 vec_append (authmsg, packet_data);
1212 vec_append (authmsg, nonce);
1213 vec_append (authmsg, id_hash);
1221 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1223 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1224 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1225 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1226 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1233 ikev2_sa_match_ts (ikev2_sa_t * sa)
1235 ikev2_main_t *km = &ikev2_main;
1237 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1241 pool_foreach (p, km->profiles, ({
1243 if (sa->is_initiator)
1257 if (p->rem_id.type != id->type ||
1258 vec_len(p->rem_id.data) != vec_len(id->data) ||
1259 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1262 vec_foreach(ts, sa->childs[0].tsi)
1264 if (ikev2_ts_cmp(p_tsi, ts))
1266 vec_add1 (tsi, ts[0]);
1271 vec_foreach(ts, sa->childs[0].tsr)
1273 if (ikev2_ts_cmp(p_tsr, ts))
1275 vec_add1 (tsr, ts[0]);
1286 vec_free (sa->childs[0].tsi);
1287 vec_free (sa->childs[0].tsr);
1288 sa->childs[0].tsi = tsi;
1289 sa->childs[0].tsr = tsr;
1295 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1300 ikev2_sa_auth (ikev2_sa_t * sa)
1302 ikev2_main_t *km = &ikev2_main;
1303 ikev2_profile_t *p, *sel_p = 0;
1304 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1305 ikev2_sa_transform_t *tr_prf;
1308 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1310 /* only shared key and rsa signature */
1311 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1312 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1314 ikev2_elog_uint (IKEV2_LOG_ERROR,
1315 "unsupported authentication method %u",
1317 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1321 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1322 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1325 ikev2_auth_t *sa_auth;
1327 if (sa->is_initiator)
1330 sa_auth = &sa->r_auth;
1335 sa_auth = &sa->i_auth;
1339 pool_foreach (p, km->profiles, ({
1342 if (p->rem_id.type != sa_id->type ||
1343 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1344 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1347 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1349 if (!p->auth.data ||
1350 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1353 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1354 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1356 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1358 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1365 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1367 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1370 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1372 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1385 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1387 if (!sa->is_initiator)
1389 vec_free (sa->r_id.data);
1390 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1391 sa->r_id.type = sel_p->loc_id.type;
1393 /* generate our auth data */
1394 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1395 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1397 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1398 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1400 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1402 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1403 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1407 /* select transforms for 1st child sa */
1408 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1409 sa->childs[0].r_proposals =
1410 ikev2_select_proposal (sa->childs[0].i_proposals,
1411 IKEV2_PROTOCOL_ESP);
1416 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1417 "profile found! ispi %lx", sa->ispi);
1418 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1426 ikev2_sa_auth_init (ikev2_sa_t * sa)
1428 ikev2_main_t *km = &ikev2_main;
1429 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1430 ikev2_sa_transform_t *tr_prf;
1433 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1435 /* only shared key and rsa signature */
1436 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1437 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1439 ikev2_elog_uint (IKEV2_LOG_ERROR,
1440 "unsupported authentication method %u",
1442 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1446 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1447 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1448 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1449 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1452 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1454 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1455 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1457 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1459 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1460 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1470 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1472 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1476 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1478 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1488 ipsec_sa_flags_t flags;
1491 ipsec_crypto_alg_t encr_type;
1492 ipsec_integ_alg_t integ_type;
1493 ip46_address_t local_ip;
1494 ip46_address_t remote_ip;
1495 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1496 } ikev2_add_ipsec_tunnel_args_t;
1499 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1501 ikev2_main_t *km = &ikev2_main;
1505 if (~0 == a->sw_if_index)
1507 /* no tunnel associated with the SA/profile - create a new one */
1508 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1509 &a->local_ip, &a->remote_ip, 0,
1510 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1511 TUNNEL_MODE_P2P, &sw_if_index);
1513 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1515 if (hash_get (km->sw_if_indices, sw_if_index))
1516 /* interface is managed by IKE; proceed with updating SAs */
1519 hash_set1 (km->sw_if_indices, sw_if_index);
1522 sw_if_index = a->sw_if_index;
1526 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1527 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1528 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1532 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1534 IPSEC_PROTOCOL_ESP, a->encr_type,
1535 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1536 a->flags, 0, a->salt_local, &a->local_ip,
1537 &a->remote_ip, NULL);
1538 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1539 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1540 a->integ_type, &a->rem_ikey,
1541 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1542 a->salt_remote, &a->remote_ip,
1543 &a->local_ip, NULL);
1546 vec_add1 (sas_in, a->remote_sa_id);
1547 rv |= ipsec_tun_protect_update (sw_if_index, a->local_sa_id, sas_in);
1551 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1554 ikev2_child_sa_t * child, u32 sa_index,
1557 ikev2_main_t *km = &ikev2_main;
1558 ipsec_crypto_alg_t encr_type;
1559 ipsec_integ_alg_t integ_type;
1560 ikev2_profile_t *p = 0;
1561 ikev2_sa_transform_t *tr;
1562 ikev2_sa_proposal_t *proposals;
1564 ikev2_add_ipsec_tunnel_args_t a;
1566 clib_memset (&a, 0, sizeof (a));
1568 if (!child->r_proposals)
1570 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1574 if (sa->is_initiator)
1576 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1577 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1578 proposals = child->i_proposals;
1579 a.local_spi = child->r_proposals[0].spi;
1580 a.remote_spi = child->i_proposals[0].spi;
1584 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1585 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1586 proposals = child->r_proposals;
1587 a.local_spi = child->i_proposals[0].spi;
1588 a.remote_spi = child->r_proposals[0].spi;
1591 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1593 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1594 if (tr && tr->esn_type)
1595 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1597 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1600 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1602 switch (tr->key_len)
1605 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1608 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1611 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1614 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1619 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1622 switch (tr->key_len)
1625 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1628 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1631 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1634 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1642 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1648 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1651 a.encr_type = encr_type;
1655 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1658 switch (tr->integ_type)
1660 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1661 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1663 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1664 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1666 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1667 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1669 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1670 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1673 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1679 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1685 integ_type = IPSEC_INTEG_ALG_NONE;
1688 a.integ_type = integ_type;
1689 ikev2_calc_child_keys (sa, child);
1691 if (sa->is_initiator)
1693 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1694 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1695 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1696 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1699 a.salt_remote = child->salt_er;
1700 a.salt_local = child->salt_ei;
1705 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1706 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1707 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1708 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1711 a.salt_remote = child->salt_ei;
1712 a.salt_local = child->salt_er;
1716 if (sa->is_profile_index_set)
1717 p = pool_elt_at_index (km->profiles, sa->profile_index);
1719 if (p && p->lifetime)
1721 child->time_to_expiration =
1722 vlib_time_now (vnm->vlib_main) + p->lifetime;
1723 if (p->lifetime_jitter)
1725 // This is not much better than rand(3), which Coverity warns
1726 // is unsuitable for security applications; random_u32 is
1727 // however fast. If this perturbance to the expiration time
1728 // needs to use a better RNG then we may need to use something
1729 // like /dev/urandom which has significant overhead.
1730 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1731 rnd = random_u32 (&rnd);
1733 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1737 if (thread_index & 0xffffffc0)
1738 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1740 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1741 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1743 child->local_sa_id =
1745 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1746 child->remote_sa_id =
1748 ikev2_mk_remote_sa_id (sa_index, child_index, thread_index);
1749 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1751 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1752 (u8 *) & a, sizeof (a));
1758 ip46_address_t local_ip;
1759 ip46_address_t remote_ip;
1763 } ikev2_del_ipsec_tunnel_args_t;
1766 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1768 ikev2_main_t *km = &ikev2_main;
1769 ipip_tunnel_t *ipip = NULL;
1772 if (~0 == a->sw_if_index)
1775 ipip_tunnel_key_t key = {
1777 .dst = a->remote_ip,
1778 .transport = IPIP_TRANSPORT_IP4,
1783 ipip = ipip_tunnel_db_find (&key);
1787 sw_if_index = ipip->sw_if_index;
1788 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1794 sw_if_index = a->sw_if_index;
1796 if (~0 != sw_if_index)
1797 ipsec_tun_protect_del (sw_if_index);
1799 ipsec_sa_unlock_id (a->remote_sa_id);
1800 ipsec_sa_unlock_id (a->local_sa_id);
1803 ipip_del_tunnel (ipip->sw_if_index);
1807 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1808 ikev2_child_sa_t * child)
1810 ikev2_del_ipsec_tunnel_args_t a;
1812 clib_memset (&a, 0, sizeof (a));
1814 if (sa->is_initiator)
1816 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1817 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1821 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1822 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1825 a.remote_sa_id = child->remote_sa_id;
1826 a.local_sa_id = child->local_sa_id;
1827 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1829 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1835 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1838 ike_payload_header_t *ph;
1842 ikev2_sa_transform_t *tr_encr, *tr_integ;
1844 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1846 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1848 ikev2_payload_chain_t *chain = 0;
1849 ikev2_payload_new_chain (chain);
1851 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1853 if (sa->r_proposals == 0)
1855 ikev2_payload_add_notify (chain,
1856 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1857 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1859 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1861 u8 *data = vec_new (u8, 2);
1862 ikev2_sa_transform_t *tr_dh;
1864 ikev2_sa_get_td_for_type (sa->r_proposals,
1865 IKEV2_TRANSFORM_TYPE_DH);
1866 ASSERT (tr_dh && tr_dh->dh_type);
1868 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1869 data[1] = (tr_dh->dh_type) & 0xff;
1871 ikev2_payload_add_notify (chain,
1872 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1875 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1877 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1879 u8 *data = vec_new (u8, 1);
1881 data[0] = sa->unsupported_cp;
1882 ikev2_payload_add_notify (chain,
1883 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1889 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1890 ikev2_payload_add_sa (chain, sa->r_proposals);
1891 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1892 ikev2_payload_add_nonce (chain, sa->r_nonce);
1895 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1897 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1899 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1900 ikev2_payload_add_auth (chain, &sa->r_auth);
1901 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1902 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1903 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1905 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1907 ikev2_payload_add_notify (chain,
1908 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1910 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1912 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1914 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1916 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1917 ikev2_payload_add_auth (chain, &sa->r_auth);
1919 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1921 ikev2_payload_add_notify (chain,
1922 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1923 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1924 ikev2_payload_add_auth (chain, &sa->r_auth);
1925 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1926 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1928 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1930 u8 *data = vec_new (u8, 1);
1932 data[0] = sa->unsupported_cp;
1933 ikev2_payload_add_notify (chain,
1934 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1938 else if (sa->state == IKEV2_STATE_SA_INIT)
1940 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1941 ikev2_payload_add_auth (chain, &sa->i_auth);
1942 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1943 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1944 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1948 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1952 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1954 /* if pending delete */
1957 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1959 if (sa->is_initiator)
1960 ikev2_payload_add_delete (chain, sa->del);
1962 /* The response to a request that deletes the IKE SA is an empty
1963 INFORMATIONAL response. */
1964 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1966 /* The response to a request that deletes ESP or AH SAs will contain
1967 delete payloads for the paired SAs going in the other direction. */
1970 ikev2_payload_add_delete (chain, sa->del);
1975 /* received N(AUTHENTICATION_FAILED) */
1976 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1978 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1981 /* received unsupported critical payload */
1982 else if (sa->unsupported_cp)
1984 u8 *data = vec_new (u8, 1);
1986 data[0] = sa->unsupported_cp;
1987 ikev2_payload_add_notify (chain,
1988 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1991 sa->unsupported_cp = 0;
1993 /* else send empty response */
1995 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1997 if (sa->is_initiator)
2000 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2001 ikev2_notify_t notify;
2002 u8 *data = vec_new (u8, 4);
2003 clib_memset (¬ify, 0, sizeof (notify));
2004 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2005 notify.spi = sa->childs[0].i_proposals->spi;
2006 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2008 ikev2_payload_add_sa (chain, proposals);
2009 ikev2_payload_add_nonce (chain, sa->i_nonce);
2010 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2011 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2012 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2021 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2022 ikev2_payload_add_nonce (chain, sa->r_nonce);
2023 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2025 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2027 vec_del1 (sa->rekey, 0);
2029 else if (sa->unsupported_cp)
2031 u8 *data = vec_new (u8, 1);
2033 data[0] = sa->unsupported_cp;
2034 ikev2_payload_add_notify (chain,
2035 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2038 sa->unsupported_cp = 0;
2042 ikev2_payload_add_notify (chain,
2043 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2050 ike->version = IKE_VERSION_2;
2051 ike->nextpayload = IKEV2_PAYLOAD_SK;
2052 tlen = sizeof (*ike);
2053 if (sa->is_initiator)
2055 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2056 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2060 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2064 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2066 tlen += vec_len (chain->data);
2067 ike->nextpayload = chain->first_payload_type;
2068 ike->length = clib_host_to_net_u32 (tlen);
2069 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2071 /* store whole IKE payload - needed for PSK auth */
2072 vec_free (sa->last_sa_init_res_packet_data);
2073 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2078 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2081 plen = sizeof (*ph);
2082 ph = (ike_payload_header_t *) & ike->payload[0];
2083 ph->nextpayload = chain->first_payload_type;
2085 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2088 /* add space for hmac */
2089 plen += tr_integ->key_trunc;
2092 /* payload and total length */
2093 ph->length = clib_host_to_net_u16 (plen);
2094 ike->length = clib_host_to_net_u32 (tlen);
2096 /* calc integrity data for whole packet except hash itself */
2098 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2099 (u8 *) ike, tlen - tr_integ->key_trunc);
2101 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2102 sizeof (*ike), integ, tr_integ->key_trunc);
2104 /* store whole IKE payload - needed for retransmit */
2105 vec_free (sa->last_res_packet_data);
2106 vec_add (sa->last_res_packet_data, ike, tlen);
2110 ikev2_payload_destroy_chain (chain);
2116 ikev2_retransmit_sa_init (ike_header_t * ike,
2117 ip4_address_t iaddr, ip4_address_t raddr)
2119 ikev2_main_t *km = &ikev2_main;
2121 u32 thread_index = vlib_get_thread_index ();
2124 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2125 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2126 sa->iaddr.as_u32 == iaddr.as_u32 &&
2127 sa->raddr.as_u32 == raddr.as_u32)
2130 u32 len = clib_net_to_host_u32(ike->length);
2131 u8 payload = ike->nextpayload;
2133 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2134 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2135 u32 plen = clib_net_to_host_u16(ikep->length);
2137 if (plen < sizeof(ike_payload_header_t))
2140 if (payload == IKEV2_PAYLOAD_NONCE)
2142 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2144 /* req is retransmit */
2145 if (sa->state == IKEV2_STATE_SA_INIT)
2148 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2149 ike->ispi = tmp->ispi;
2150 ike->rspi = tmp->rspi;
2151 ike->nextpayload = tmp->nextpayload;
2152 ike->version = tmp->version;
2153 ike->exchange = tmp->exchange;
2154 ike->flags = tmp->flags;
2155 ike->msgid = tmp->msgid;
2156 ike->length = tmp->length;
2157 clib_memcpy_fast(ike->payload, tmp->payload,
2158 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2159 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2160 "ispi %lx IKE_SA_INIT retransmit "
2161 "from %d.%d.%d.%d to %d.%d.%d.%d",
2163 raddr.as_u32, iaddr.as_u32);
2166 /* else ignore req */
2169 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2170 "ispi %lx IKE_SA_INIT ignore "
2171 "from %d.%d.%d.%d to %d.%d.%d.%d",
2173 raddr.as_u32, iaddr.as_u32);
2178 payload = ikep->nextpayload;
2185 /* req is not retransmit */
2190 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2192 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2195 if (msg_id > sa->last_msg_id)
2197 sa->last_msg_id = msg_id;
2200 /* retransmitted req */
2201 else if (msg_id == sa->last_msg_id)
2204 tmp = (ike_header_t *) sa->last_res_packet_data;
2205 ike->ispi = tmp->ispi;
2206 ike->rspi = tmp->rspi;
2207 ike->nextpayload = tmp->nextpayload;
2208 ike->version = tmp->version;
2209 ike->exchange = tmp->exchange;
2210 ike->flags = tmp->flags;
2211 ike->msgid = tmp->msgid;
2212 ike->length = tmp->length;
2213 clib_memcpy_fast (ike->payload, tmp->payload,
2214 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2215 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2216 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2219 /* old req ignore */
2222 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2223 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2230 ikev2_node_fn (vlib_main_t * vm,
2231 vlib_node_runtime_t * node, vlib_frame_t * frame)
2233 u32 n_left_from, *from, *to_next;
2234 ikev2_next_t next_index;
2235 ikev2_main_t *km = &ikev2_main;
2236 u32 thread_index = vlib_get_thread_index ();
2238 from = vlib_frame_vector_args (frame);
2239 n_left_from = frame->n_vectors;
2240 next_index = node->cached_next_index;
2242 while (n_left_from > 0)
2246 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2248 while (n_left_from > 0 && n_left_to_next > 0)
2252 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2257 ikev2_sa_t *sa0 = 0;
2258 ikev2_sa_t sa; /* temporary store for SA */
2262 /* speculatively enqueue b0 to the current next frame */
2268 n_left_to_next -= 1;
2270 b0 = vlib_get_buffer (vm, bi0);
2271 ike0 = vlib_buffer_get_current (b0);
2272 vlib_buffer_advance (b0, -sizeof (*udp0));
2273 udp0 = vlib_buffer_get_current (b0);
2274 vlib_buffer_advance (b0, -sizeof (*ip40));
2275 ip40 = vlib_buffer_get_current (b0);
2277 if (ike0->version != IKE_VERSION_2)
2279 vlib_node_increment_counter (vm, ikev2_node.index,
2280 IKEV2_ERROR_NOT_IKEV2, 1);
2284 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2287 clib_memset (sa0, 0, sizeof (*sa0));
2289 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2291 if (ike0->rspi == 0)
2293 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2294 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2296 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2300 vlib_node_increment_counter (vm, ikev2_node.index,
2301 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2303 len = clib_net_to_host_u32 (ike0->length);
2308 vlib_node_increment_counter (vm, ikev2_node.index,
2309 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2314 ikev2_process_sa_init_req (vm, sa0, ike0);
2316 if (sa0->state == IKEV2_STATE_SA_INIT)
2318 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2320 ikev2_select_proposal (sa0->i_proposals,
2321 IKEV2_PROTOCOL_IKE);
2322 ikev2_generate_sa_init_data (sa0);
2325 if (sa0->state == IKEV2_STATE_SA_INIT
2326 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2328 len = ikev2_generate_message (sa0, ike0, 0);
2331 if (sa0->state == IKEV2_STATE_SA_INIT)
2333 /* add SA to the pool */
2334 pool_get (km->per_thread_data[thread_index].sas,
2336 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2338 per_thread_data[thread_index].sa_by_rspi,
2341 km->per_thread_data[thread_index].sas);
2345 ikev2_sa_free_all_vec (sa0);
2349 else //received sa_init without initiator flag
2351 ikev2_process_sa_init_resp (vm, sa0, ike0);
2353 if (sa0->state == IKEV2_STATE_SA_INIT)
2355 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2356 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2360 pool_elt_at_index (km->sais, p[0]);
2362 ikev2_complete_sa_data (sa0, sai);
2363 ikev2_calc_keys (sa0);
2364 ikev2_sa_auth_init (sa0);
2365 len = ikev2_generate_message (sa0, ike0, 0);
2369 if (sa0->state == IKEV2_STATE_SA_INIT)
2371 /* add SA to the pool */
2372 pool_get (km->per_thread_data[thread_index].sas, sa0);
2373 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2374 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2376 sa0 - km->per_thread_data[thread_index].sas);
2380 ikev2_sa_free_all_vec (sa0);
2384 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2387 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2388 clib_net_to_host_u64 (ike0->rspi));
2392 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2395 r = ikev2_retransmit_resp (sa0, ike0);
2398 vlib_node_increment_counter (vm, ikev2_node.index,
2399 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2401 len = clib_net_to_host_u32 (ike0->length);
2406 vlib_node_increment_counter (vm, ikev2_node.index,
2407 IKEV2_ERROR_IKE_REQ_IGNORE,
2412 ikev2_process_auth_req (vm, sa0, ike0);
2413 ikev2_sa_auth (sa0);
2414 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2416 ikev2_initial_contact_cleanup (sa0);
2417 ikev2_sa_match_ts (sa0);
2418 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2419 ikev2_create_tunnel_interface (km->vnet_main,
2425 if (sa0->is_initiator)
2427 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2431 pool_elt_at_index (km->sais, p[0]);
2432 hash_unset (km->sa_by_ispi, sai->ispi);
2433 ikev2_sa_free_all_vec (sai);
2434 pool_put (km->sais, sai);
2439 len = ikev2_generate_message (sa0, ike0, 0);
2443 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2446 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2447 clib_net_to_host_u64 (ike0->rspi));
2451 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2454 r = ikev2_retransmit_resp (sa0, ike0);
2457 vlib_node_increment_counter (vm, ikev2_node.index,
2458 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2460 len = clib_net_to_host_u32 (ike0->length);
2465 vlib_node_increment_counter (vm, ikev2_node.index,
2466 IKEV2_ERROR_IKE_REQ_IGNORE,
2471 ikev2_process_informational_req (vm, sa0, ike0);
2474 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2476 ikev2_delete_t *d, *tmp, *resp = 0;
2477 vec_foreach (d, sa0->del)
2479 ikev2_child_sa_t *ch_sa;
2480 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2482 !sa0->is_initiator);
2485 ikev2_delete_tunnel_interface (km->vnet_main,
2487 if (!sa0->is_initiator)
2489 vec_add2 (resp, tmp, 1);
2490 tmp->protocol_id = d->protocol_id;
2491 tmp->spi = ch_sa->r_proposals[0].spi;
2493 ikev2_sa_del_child_sa (sa0, ch_sa);
2496 if (!sa0->is_initiator)
2498 vec_free (sa0->del);
2503 if (!sa0->is_initiator)
2505 len = ikev2_generate_message (sa0, ike0, 0);
2509 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2512 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2513 clib_net_to_host_u64 (ike0->rspi));
2517 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2520 r = ikev2_retransmit_resp (sa0, ike0);
2523 vlib_node_increment_counter (vm, ikev2_node.index,
2524 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2526 len = clib_net_to_host_u32 (ike0->length);
2531 vlib_node_increment_counter (vm, ikev2_node.index,
2532 IKEV2_ERROR_IKE_REQ_IGNORE,
2537 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2540 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2543 vec_free (sa0->childs);
2544 ikev2_child_sa_t *child;
2545 vec_add2 (sa0->childs, child, 1);
2546 child->r_proposals = sa0->rekey[0].r_proposal;
2547 child->i_proposals = sa0->rekey[0].i_proposal;
2548 child->tsi = sa0->rekey[0].tsi;
2549 child->tsr = sa0->rekey[0].tsr;
2550 ikev2_create_tunnel_interface (km->vnet_main,
2553 child - sa0->childs);
2555 if (sa0->is_initiator)
2557 vec_del1 (sa0->rekey, 0);
2561 len = ikev2_generate_message (sa0, ike0, 0);
2568 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2569 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2571 ip40->src_address.as_u32,
2572 ip40->dst_address.as_u32);
2576 /* if we are sending packet back, rewrite headers */
2579 next0 = IKEV2_NEXT_IP4_LOOKUP;
2580 if (sa0->is_initiator)
2582 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2583 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2587 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2588 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2591 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2593 b0->current_length =
2594 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2595 ip40->length = clib_host_to_net_u16 (b0->current_length);
2596 ip40->checksum = ip4_header_checksum (ip40);
2599 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2600 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2602 ikev2_child_sa_t *c;
2604 vec_foreach (c, sa0->childs)
2605 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2607 ikev2_delete_sa (sa0);
2609 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2611 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2612 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2614 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2615 t->sw_if_index = sw_if_index0;
2616 t->next_index = next0;
2619 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2620 n_left_to_next, bi0, next0);
2623 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2626 vlib_node_increment_counter (vm, ikev2_node.index,
2627 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2628 return frame->n_vectors;
2632 VLIB_REGISTER_NODE (ikev2_node,static) = {
2633 .function = ikev2_node_fn,
2635 .vector_size = sizeof (u32),
2636 .format_trace = format_ikev2_trace,
2637 .type = VLIB_NODE_TYPE_INTERNAL,
2639 .n_errors = ARRAY_LEN(ikev2_error_strings),
2640 .error_strings = ikev2_error_strings,
2642 .n_next_nodes = IKEV2_N_NEXT,
2645 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2646 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2651 // set ikev2 proposals when vpp is used as initiator
2652 static clib_error_t *
2653 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2654 ikev2_transforms_set * ts,
2655 ikev2_sa_proposal_t ** proposals, int is_ike)
2658 ikev2_main_t *km = &ikev2_main;
2659 ikev2_sa_proposal_t *proposal;
2660 vec_add2 (*proposals, proposal, 1);
2661 ikev2_sa_transform_t *td;
2666 vec_foreach (td, km->supported_transforms)
2668 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2669 && td->encr_type == ts->crypto_alg
2670 && td->key_len == ts->crypto_key_size / 8)
2673 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2674 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2675 vec_add (td->attrs, (u8 *) attr, 4);
2676 vec_add1 (proposal->transforms, *td);
2685 r = clib_error_return (0, "Unsupported algorithm");
2691 vec_foreach (td, km->supported_transforms)
2693 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2694 && td->integ_type == ts->integ_alg)
2696 vec_add1 (proposal->transforms, *td);
2704 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2705 r = clib_error_return (0, "Unsupported algorithm");
2713 vec_foreach (td, km->supported_transforms)
2715 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2716 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2718 vec_add1 (proposal->transforms, *td);
2725 r = clib_error_return (0, "Unsupported algorithm");
2731 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2734 vec_foreach (td, km->supported_transforms)
2736 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2738 vec_add1 (proposal->transforms, *td);
2741 sa->dh_group = td->dh_type;
2749 r = clib_error_return (0, "Unsupported algorithm");
2757 vec_foreach (td, km->supported_transforms)
2759 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2761 vec_add1 (proposal->transforms, *td);
2768 r = clib_error_return (0, "Unsupported algorithm");
2777 static ikev2_profile_t *
2778 ikev2_profile_index_by_name (u8 * name)
2780 ikev2_main_t *km = &ikev2_main;
2783 p = mhash_get (&km->profile_index_by_name, name);
2787 return pool_elt_at_index (km->profiles, p[0]);
2792 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2801 b0 = vlib_get_buffer (vm, bi0);
2802 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2803 udp0 = vlib_buffer_get_current (b0);
2804 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2805 ip40 = vlib_buffer_get_current (b0);
2808 ip40->ip_version_and_header_length = 0x45;
2810 ip40->fragment_id = 0;
2811 ip40->flags_and_fragment_offset = 0;
2813 ip40->protocol = IP_PROTOCOL_UDP;
2814 ip40->dst_address.as_u32 = dst->as_u32;
2815 ip40->src_address.as_u32 = src->as_u32;
2816 udp0->dst_port = clib_host_to_net_u16 (500);
2817 udp0->src_port = clib_host_to_net_u16 (500);
2818 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2820 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2821 ip40->length = clib_host_to_net_u16 (b0->current_length);
2822 ip40->checksum = ip4_header_checksum (ip40);
2825 /* send the request */
2826 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2827 to_next = vlib_frame_vector_args (f);
2830 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2835 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2838 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2843 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2844 *ike = vlib_buffer_get_current (b0);
2849 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2851 ikev2_main_t *km = &ikev2_main;
2853 km->pkey = ikev2_load_key_file (file);
2854 if (km->pkey == NULL)
2855 return clib_error_return (0, "load key '%s' failed", file);
2861 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2863 ikev2_main_t *km = &ikev2_main;
2868 if (ikev2_profile_index_by_name (name))
2869 return clib_error_return (0, "policy %v already exists", name);
2871 pool_get (km->profiles, p);
2872 clib_memset (p, 0, sizeof (*p));
2873 p->name = vec_dup (name);
2874 p->responder.sw_if_index = ~0;
2875 uword index = p - km->profiles;
2876 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2880 p = ikev2_profile_index_by_name (name);
2882 return clib_error_return (0, "policy %v does not exists", name);
2885 pool_put (km->profiles, p);
2886 mhash_unset (&km->profile_index_by_name, name, 0);
2892 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2893 u8 * auth_data, u8 data_hex_format)
2898 p = ikev2_profile_index_by_name (name);
2902 r = clib_error_return (0, "unknown profile %v", name);
2905 vec_free (p->auth.data);
2906 p->auth.method = auth_method;
2907 p->auth.data = vec_dup (auth_data);
2908 p->auth.hex = data_hex_format;
2910 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2912 vec_add1 (p->auth.data, 0);
2914 EVP_PKEY_free (p->auth.key);
2915 p->auth.key = ikev2_load_cert_file (auth_data);
2916 if (p->auth.key == NULL)
2917 return clib_error_return (0, "load cert '%s' failed", auth_data);
2924 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2930 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2931 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2933 r = clib_error_return (0, "unsupported identity type %U",
2934 format_ikev2_id_type, id_type);
2938 p = ikev2_profile_index_by_name (name);
2942 r = clib_error_return (0, "unknown profile %v", name);
2948 vec_free (p->loc_id.data);
2949 p->loc_id.type = id_type;
2950 p->loc_id.data = vec_dup (data);
2954 vec_free (p->rem_id.data);
2955 p->rem_id.type = id_type;
2956 p->rem_id.data = vec_dup (data);
2963 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2964 u16 start_port, u16 end_port, ip4_address_t start_addr,
2965 ip4_address_t end_addr, int is_local)
2970 p = ikev2_profile_index_by_name (name);
2974 r = clib_error_return (0, "unknown profile %v", name);
2980 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2981 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2982 p->loc_ts.start_port = start_port;
2983 p->loc_ts.end_port = end_port;
2984 p->loc_ts.protocol_id = protocol_id;
2985 p->loc_ts.ts_type = 7;
2989 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2990 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2991 p->rem_ts.start_port = start_port;
2992 p->rem_ts.end_port = end_port;
2993 p->rem_ts.protocol_id = protocol_id;
2994 p->rem_ts.ts_type = 7;
3002 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3003 u32 sw_if_index, ip4_address_t ip4)
3008 p = ikev2_profile_index_by_name (name);
3012 r = clib_error_return (0, "unknown profile %v", name);
3016 p->responder.sw_if_index = sw_if_index;
3017 p->responder.ip4 = ip4;
3023 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3024 ikev2_transform_encr_type_t crypto_alg,
3025 ikev2_transform_integ_type_t integ_alg,
3026 ikev2_transform_dh_type_t dh_type,
3027 u32 crypto_key_size)
3032 p = ikev2_profile_index_by_name (name);
3036 r = clib_error_return (0, "unknown profile %v", name);
3040 p->ike_ts.crypto_alg = crypto_alg;
3041 p->ike_ts.integ_alg = integ_alg;
3042 p->ike_ts.dh_type = dh_type;
3043 p->ike_ts.crypto_key_size = crypto_key_size;
3048 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3049 ikev2_transform_encr_type_t crypto_alg,
3050 ikev2_transform_integ_type_t integ_alg,
3051 ikev2_transform_dh_type_t dh_type,
3052 u32 crypto_key_size)
3057 p = ikev2_profile_index_by_name (name);
3061 r = clib_error_return (0, "unknown profile %v", name);
3065 p->esp_ts.crypto_alg = crypto_alg;
3066 p->esp_ts.integ_alg = integ_alg;
3067 p->esp_ts.dh_type = dh_type;
3068 p->esp_ts.crypto_key_size = crypto_key_size;
3073 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3074 u8 * name, u32 sw_if_index)
3079 p = ikev2_profile_index_by_name (name);
3083 r = clib_error_return (0, "unknown profile %v", name);
3087 p->tun_itf = sw_if_index;
3093 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3094 u64 lifetime, u32 jitter, u32 handover,
3100 p = ikev2_profile_index_by_name (name);
3104 r = clib_error_return (0, "unknown profile %v", name);
3108 p->lifetime = lifetime;
3109 p->lifetime_jitter = jitter;
3110 p->handover = handover;
3111 p->lifetime_maxdata = maxdata;
3116 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3120 ip4_main_t *im = &ip4_main;
3121 ikev2_main_t *km = &ikev2_main;
3123 p = ikev2_profile_index_by_name (name);
3127 r = clib_error_return (0, "unknown profile %v", name);
3131 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3133 r = clib_error_return (0, "responder not set for profile %v", name);
3138 /* Create the Initiator Request */
3142 ip_lookup_main_t *lm = &im->lookup_main;
3144 int len = sizeof (ike_header_t);
3146 /* Get own iface IP */
3148 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3149 ip_interface_address_t *if_add =
3150 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3151 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3153 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3155 /* Prepare the SA and the IKE payload */
3157 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3158 ikev2_payload_chain_t *chain = 0;
3159 ikev2_payload_new_chain (chain);
3161 /* Build the IKE proposal payload */
3162 ikev2_sa_proposal_t *proposals = 0;
3163 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3164 proposals[0].proposal_num = 1;
3165 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3167 /* Add and then cleanup proposal data */
3168 ikev2_payload_add_sa (chain, proposals);
3169 ikev2_sa_free_proposal_vector (&proposals);
3171 sa.is_initiator = 1;
3172 sa.profile_index = km->profiles - p;
3173 sa.is_profile_index_set = 1;
3174 sa.state = IKEV2_STATE_SA_INIT;
3175 sa.tun_itf = p->tun_itf;
3176 sa.is_tun_itf_set = 1;
3177 ikev2_generate_sa_init_data (&sa);
3178 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3179 ikev2_payload_add_nonce (chain, sa.i_nonce);
3181 /* Build the child SA proposal */
3182 vec_resize (sa.childs, 1);
3183 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3184 &sa.childs[0].i_proposals, 0);
3185 sa.childs[0].i_proposals[0].proposal_num = 1;
3186 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3187 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3188 sizeof (sa.childs[0].i_proposals[0].spi));
3192 /* Add NAT detection notification messages (mandatory) */
3193 u8 nat_detection_source[8 + 8 + 4 + 2];
3194 u8 *nat_detection_sha1 = vec_new (u8, 20);
3196 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3197 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3198 tmpspi = clib_host_to_net_u64 (sa.rspi);
3199 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3200 u16 tmpport = clib_host_to_net_u16 (500);
3201 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3203 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3204 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3205 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3206 nat_detection_sha1);
3207 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3208 nat_detection_sha1);
3209 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3210 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3211 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3212 nat_detection_sha1);
3213 ikev2_payload_add_notify (chain,
3214 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3215 nat_detection_sha1);
3216 vec_free (nat_detection_sha1);
3218 u8 *sig_hash_algo = vec_new (u8, 8);
3219 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3220 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3221 ikev2_payload_add_notify (chain,
3222 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3224 vec_free (sig_hash_algo);
3227 /* Buffer update and boilerplate */
3228 len += vec_len (chain->data);
3229 ike0->nextpayload = chain->first_payload_type;
3230 ike0->length = clib_host_to_net_u32 (len);
3231 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3232 ikev2_payload_destroy_chain (chain);
3234 ike0->version = IKE_VERSION_2;
3235 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3236 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3237 ike0->ispi = sa.ispi;
3241 /* store whole IKE payload - needed for PSK auth */
3242 vec_free (sa.last_sa_init_req_packet_data);
3243 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3245 /* add data to the SA then add it to the pool */
3246 sa.iaddr.as_u32 = if_ip->as_u32;
3247 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3248 sa.i_id.type = p->loc_id.type;
3249 sa.i_id.data = vec_dup (p->loc_id.data);
3250 sa.i_auth.method = p->auth.method;
3251 sa.i_auth.hex = p->auth.hex;
3252 sa.i_auth.data = vec_dup (p->auth.data);
3253 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3254 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3256 /* add SA to the pool */
3257 ikev2_sa_t *sa0 = 0;
3258 pool_get (km->sais, sa0);
3259 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3260 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3262 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3264 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3265 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3266 p->responder.ip4.as_u32);
3273 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3274 ikev2_child_sa_t * csa)
3276 /* Create the Initiator notification for child SA removal */
3277 ikev2_main_t *km = &ikev2_main;
3282 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3285 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3286 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3287 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3288 vec_resize (sa->del, 1);
3289 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3290 sa->del->spi = csa->i_proposals->spi;
3291 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3292 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3293 len = ikev2_generate_message (sa, ike0, 0);
3295 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3297 /* delete local child SA */
3298 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3299 ikev2_sa_del_child_sa (sa, csa);
3303 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3306 ikev2_main_t *km = &ikev2_main;
3307 ikev2_main_per_thread_data_t *tkm;
3308 ikev2_sa_t *fsa = 0;
3309 ikev2_child_sa_t *fchild = 0;
3311 /* Search for the child SA */
3312 vec_foreach (tkm, km->per_thread_data)
3318 pool_foreach (sa, tkm->sas, ({
3319 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3329 if (!fchild || !fsa)
3331 r = clib_error_return (0, "Child SA not found");
3336 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3343 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3346 ikev2_main_t *km = &ikev2_main;
3347 ikev2_main_per_thread_data_t *tkm;
3348 ikev2_sa_t *fsa = 0;
3349 ikev2_main_per_thread_data_t *ftkm = 0;
3351 /* Search for the IKE SA */
3352 vec_foreach (tkm, km->per_thread_data)
3358 pool_foreach (sa, tkm->sas, ({
3359 if (sa->ispi == ispi)
3371 r = clib_error_return (0, "IKE SA not found");
3376 /* Create the Initiator notification for IKE SA removal */
3382 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3385 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3386 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3387 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3388 vec_resize (fsa->del, 1);
3389 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3390 fsa->del->spi = ispi;
3391 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3392 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3393 len = ikev2_generate_message (fsa, ike0, 0);
3395 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3399 /* delete local SA */
3400 ikev2_child_sa_t *c;
3401 vec_foreach (c, fsa->childs)
3403 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3404 ikev2_sa_del_child_sa (fsa, c);
3406 ikev2_sa_free_all_vec (fsa);
3407 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3410 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3411 pool_put (ftkm->sas, fsa);
3419 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3420 ikev2_child_sa_t * csa)
3422 /* Create the Initiator request for create child SA */
3428 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3431 ike0->version = IKE_VERSION_2;
3432 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3433 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3434 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3435 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3436 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3437 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3439 ikev2_rekey_t *rekey;
3440 vec_add2 (sa->rekey, rekey, 1);
3441 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3444 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3445 rekey->spi = proposals[0].spi;
3446 rekey->ispi = csa->i_proposals->spi;
3447 len = ikev2_generate_message (sa, ike0, proposals);
3448 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3449 vec_free (proposals);
3453 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3456 ikev2_main_t *km = &ikev2_main;
3457 ikev2_main_per_thread_data_t *tkm;
3458 ikev2_sa_t *fsa = 0;
3459 ikev2_child_sa_t *fchild = 0;
3461 /* Search for the child SA */
3462 vec_foreach (tkm, km->per_thread_data)
3468 pool_foreach (sa, tkm->sas, ({
3469 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3479 if (!fchild || !fsa)
3481 r = clib_error_return (0, "Child SA not found");
3486 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3493 ikev2_init (vlib_main_t * vm)
3495 ikev2_main_t *km = &ikev2_main;
3496 vlib_thread_main_t *tm = vlib_get_thread_main ();
3499 clib_memset (km, 0, sizeof (ikev2_main_t));
3500 km->vnet_main = vnet_get_main ();
3503 ikev2_crypto_init (km);
3505 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3507 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3508 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3510 km->per_thread_data[thread_id].sa_by_rspi =
3511 hash_create (0, sizeof (uword));
3514 km->sa_by_ispi = hash_create (0, sizeof (uword));
3515 km->sw_if_indices = hash_create (0, 0);
3517 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3519 ikev2_cli_reference ();
3525 VLIB_INIT_FUNCTION (ikev2_init) =
3527 .runs_after = VLIB_INITS("ipsec_init"),
3533 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3535 ikev2_main_t *km = &ikev2_main;
3536 ikev2_profile_t *p = 0;
3537 vlib_main_t *vm = km->vlib_main;
3538 f64 now = vlib_time_now (vm);
3541 if (sa->is_profile_index_set)
3542 p = pool_elt_at_index (km->profiles, sa->profile_index);
3544 if (sa->is_initiator && p && csa->time_to_expiration
3545 && now > csa->time_to_expiration)
3547 if (!csa->is_expired || csa->rekey_retries > 0)
3549 ikev2_rekey_child_sa_internal (vm, sa, csa);
3550 csa->time_to_expiration = now + p->handover;
3551 csa->is_expired = 1;
3552 if (csa->rekey_retries == 0)
3554 csa->rekey_retries = 5;
3556 else if (csa->rekey_retries > 0)
3558 csa->rekey_retries--;
3559 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3560 csa->i_proposals->spi, csa->rekey_retries);
3561 if (csa->rekey_retries == 0)
3563 csa->rekey_retries = -1;
3570 csa->time_to_expiration = 0;
3571 ikev2_delete_child_sa_internal (vm, sa, csa);
3580 ikev2_set_log_level (ikev2_log_level_t log_level)
3582 ikev2_main_t *km = &ikev2_main;
3584 if (log_level >= IKEV2_LOG_MAX)
3586 ikev2_log_error ("unknown logging level %d", log_level);
3590 km->log_level = log_level;
3595 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3597 ikev2_main_t *km = &ikev2_main;
3598 vlib_main_t *vm = km->vlib_main;
3599 ikev2_main_per_thread_data_t *tkm;
3600 ikev2_sa_t *fsa = 0;
3601 ikev2_profile_t *p = 0;
3602 ikev2_child_sa_t *fchild = 0;
3603 f64 now = vlib_time_now (vm);
3604 vlib_counter_t counts;
3606 /* Search for the SA and child SA */
3607 vec_foreach (tkm, km->per_thread_data)
3613 pool_foreach (sa, tkm->sas, ({
3614 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3623 vlib_get_combined_counter (&ipsec_sa_counters,
3624 ipsec_sa->stat_index, &counts);
3626 if (fsa && fsa->is_profile_index_set)
3627 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3629 if (fchild && p && p->lifetime_maxdata)
3631 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3633 fchild->time_to_expiration = now;
3638 static vlib_node_registration_t ikev2_mngr_process_node;
3641 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3644 ikev2_main_t *km = &ikev2_main;
3645 ipsec_main_t *im = &ipsec_main;
3650 vlib_process_wait_for_event_or_clock (vm, 1);
3651 vlib_process_get_events (vm, NULL);
3653 /* process ike child sas */
3654 ikev2_main_per_thread_data_t *tkm;
3655 vec_foreach (tkm, km->per_thread_data)
3659 pool_foreach (sa, tkm->sas, ({
3660 ikev2_child_sa_t *c;
3661 vec_foreach (c, sa->childs)
3663 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3669 /* process ipsec sas */
3672 pool_foreach (sa, im->sad, ({
3673 ikev2_mngr_process_ipsec_sa(sa);
3679 vlib_process_wait_for_event_or_clock (vm, 5);
3680 vlib_process_get_events (vm, NULL);
3689 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3690 .function = ikev2_mngr_process_fn,
3691 .type = VLIB_NODE_TYPE_PROCESS,
3693 "ikev2-manager-process",
3696 VLIB_PLUGIN_REGISTER () = {
3697 .version = VPP_BUILD_VER,
3698 .description = "Internet Key Exchange (IKEv2) Protocol",
3703 * fd.io coding-style-patch-verification: ON
3706 * eval: (c-set-style "gnu")