2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vpp/app/version.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <vnet/ipsec/ipsec_tun.h>
26 #include <vnet/ipip/ipip.h>
27 #include <plugins/ikev2/ikev2.h>
28 #include <plugins/ikev2/ikev2_priv.h>
29 #include <openssl/sha.h>
31 ikev2_main_t ikev2_main;
33 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
35 ikev2_child_sa_t * child);
37 #define ikev2_set_state(sa, v) do { \
39 clib_warning("sa state changed to " #v); \
49 format_ikev2_trace (u8 * s, va_list * args)
51 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
52 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
53 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
55 s = format (s, "ikev2: sw_if_index %d, next index %d",
56 t->sw_if_index, t->next_index);
60 static vlib_node_registration_t ikev2_node;
62 #define foreach_ikev2_error \
63 _(PROCESSED, "IKEv2 packets processed") \
64 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
65 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
66 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
67 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
68 _(NOT_IKEV2, "Non IKEv2 packets received")
72 #define _(sym,str) IKEV2_ERROR_##sym,
78 static char *ikev2_error_strings[] = {
79 #define _(sym,string) string,
86 IKEV2_NEXT_IP4_LOOKUP,
87 IKEV2_NEXT_ERROR_DROP,
91 static ikev2_sa_transform_t *
92 ikev2_find_transform_data (ikev2_sa_transform_t * t)
94 ikev2_main_t *km = &ikev2_main;
95 ikev2_sa_transform_t *td;
97 vec_foreach (td, km->supported_transforms)
99 if (td->type != t->type)
102 if (td->transform_id != t->transform_id)
105 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
107 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
108 || t->attrs[1] != 14)
111 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
119 static ikev2_sa_proposal_t *
120 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
121 ikev2_protocol_id_t prot_id)
123 ikev2_sa_proposal_t *rv = 0;
124 ikev2_sa_proposal_t *proposal;
125 ikev2_sa_transform_t *transform, *new_t;
126 u8 mandatory_bitmap, optional_bitmap;
128 if (prot_id == IKEV2_PROTOCOL_IKE)
130 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
131 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
132 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
133 optional_bitmap = mandatory_bitmap;
135 else if (prot_id == IKEV2_PROTOCOL_ESP)
137 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
138 (1 << IKEV2_TRANSFORM_TYPE_ESN);
139 optional_bitmap = mandatory_bitmap |
140 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
142 else if (prot_id == IKEV2_PROTOCOL_AH)
144 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
145 (1 << IKEV2_TRANSFORM_TYPE_ESN);
146 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
151 vec_add2 (rv, proposal, 1);
153 vec_foreach (proposal, proposals)
156 if (proposal->protocol_id != prot_id)
159 vec_foreach (transform, proposal->transforms)
161 if ((1 << transform->type) & bitmap)
164 if (ikev2_find_transform_data (transform))
166 bitmap |= 1 << transform->type;
167 vec_add2 (rv->transforms, new_t, 1);
168 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
169 new_t->attrs = vec_dup (transform->attrs);
173 clib_warning ("bitmap is %x mandatory is %x optional is %x",
174 bitmap, mandatory_bitmap, optional_bitmap);
176 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
177 (bitmap & ~optional_bitmap) == 0)
179 rv->proposal_num = proposal->proposal_num;
180 rv->protocol_id = proposal->protocol_id;
181 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
186 vec_free (rv->transforms);
195 ikev2_sa_transform_t *
196 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
197 ikev2_transform_type_t type)
199 ikev2_sa_transform_t *t;
204 vec_foreach (t, p->transforms)
207 return ikev2_find_transform_data (t);
213 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
217 vec_foreach (c, sa->childs)
219 ikev2_sa_proposal_t *proposal =
220 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
221 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
229 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
231 ikev2_sa_proposal_t *p;
232 ikev2_sa_transform_t *t;
239 vec_foreach (t, p->transforms)
243 vec_free (p->transforms);
249 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
251 ikev2_sa_free_proposal_vector (&c->r_proposals);
252 ikev2_sa_free_proposal_vector (&c->i_proposals);
262 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
265 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
271 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
273 ikev2_sa_free_child_sa (child);
274 vec_del1 (sa->childs, child - sa->childs);
278 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
280 vec_free (sa->i_nonce);
281 vec_free (sa->i_dh_data);
282 vec_free (sa->dh_shared_key);
283 vec_free (sa->dh_private_key);
285 ikev2_sa_free_proposal_vector (&sa->r_proposals);
286 ikev2_sa_free_proposal_vector (&sa->i_proposals);
289 vec_free (sa->sk_ai);
290 vec_free (sa->sk_ar);
291 vec_free (sa->sk_ei);
292 vec_free (sa->sk_er);
293 vec_free (sa->sk_pi);
294 vec_free (sa->sk_pr);
296 vec_free (sa->i_id.data);
297 vec_free (sa->i_auth.data);
298 vec_free (sa->r_id.data);
299 vec_free (sa->r_auth.data);
301 EVP_PKEY_free (sa->r_auth.key);
305 ikev2_sa_free_all_child_sa (&sa->childs);
309 ikev2_delete_sa (ikev2_sa_t * sa)
311 ikev2_main_t *km = &ikev2_main;
312 u32 thread_index = vlib_get_thread_index ();
315 ikev2_sa_free_all_vec (sa);
317 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
320 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
321 pool_put (km->per_thread_data[thread_index].sas, sa);
326 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
328 ikev2_sa_transform_t *t = 0, *t2;
329 ikev2_main_t *km = &ikev2_main;
331 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
336 /* check if received DH group is on our list of supported groups */
337 vec_foreach (t2, km->supported_transforms)
339 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
348 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
349 vec_len (sa->i_dh_data));
350 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
354 if (sa->is_initiator)
357 RAND_bytes ((u8 *) & sa->ispi, 8);
360 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
361 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
366 RAND_bytes ((u8 *) & sa->rspi, 8);
369 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
370 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
373 /* generate dh keys */
374 ikev2_generate_dh (sa, t);
379 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
381 ikev2_sa_transform_t *t = 0, *t2;
382 ikev2_main_t *km = &ikev2_main;
385 /*move some data to the new SA */
386 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
387 sa->i_nonce = _(sai->i_nonce);
388 sa->i_dh_data = _(sai->i_dh_data);
389 sa->dh_private_key = _(sai->dh_private_key);
390 sa->iaddr.as_u32 = sai->iaddr.as_u32;
391 sa->raddr.as_u32 = sai->raddr.as_u32;
392 sa->is_initiator = sai->is_initiator;
393 sa->i_id.type = sai->i_id.type;
394 sa->profile_index = sai->profile_index;
395 sa->is_profile_index_set = sai->is_profile_index_set;
396 sa->i_id.data = _(sai->i_id.data);
397 sa->i_auth.method = sai->i_auth.method;
398 sa->i_auth.hex = sai->i_auth.hex;
399 sa->i_auth.data = _(sai->i_auth.data);
400 sa->i_auth.key = _(sai->i_auth.key);
401 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
402 sa->childs = _(sai->childs);
406 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
411 /* check if received DH group is on our list of supported groups */
412 vec_foreach (t2, km->supported_transforms)
414 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
423 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
424 vec_len (sa->i_dh_data));
425 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
430 /* generate dh keys */
431 ikev2_complete_dh (sa, t);
436 ikev2_calc_keys (ikev2_sa_t * sa)
439 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
442 u16 integ_key_len = 0;
443 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
445 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
447 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
449 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
452 integ_key_len = tr_integ->key_len;
454 vec_append (s, sa->i_nonce);
455 vec_append (s, sa->r_nonce);
456 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
458 /* Calculate S = Ni | Nr | SPIi | SPIr */
460 vec_add2 (s, tmp, 2 * sizeof (*spi));
462 spi[0] = clib_host_to_net_u64 (sa->ispi);
463 spi[1] = clib_host_to_net_u64 (sa->rspi);
465 /* calculate PRFplus */
467 int len = tr_prf->key_trunc + /* SK_d */
468 integ_key_len * 2 + /* SK_ai, SK_ar */
469 tr_encr->key_len * 2 + /* SK_ei, SK_er */
470 tr_prf->key_len * 2; /* SK_pi, SK_pr */
472 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
479 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
480 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
481 pos += tr_prf->key_trunc;
486 sa->sk_ai = vec_new (u8, integ_key_len);
487 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
488 pos += integ_key_len;
491 sa->sk_ar = vec_new (u8, integ_key_len);
492 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
493 pos += integ_key_len;
497 sa->sk_ei = vec_new (u8, tr_encr->key_len);
498 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
499 pos += tr_encr->key_len;
502 sa->sk_er = vec_new (u8, tr_encr->key_len);
503 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
504 pos += tr_encr->key_len;
507 sa->sk_pi = vec_new (u8, tr_prf->key_len);
508 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
509 pos += tr_prf->key_len;
512 sa->sk_pr = vec_new (u8, tr_prf->key_len);
513 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
514 pos += tr_prf->key_len;
520 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
523 u16 integ_key_len = 0;
526 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
528 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
530 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
532 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
535 integ_key_len = ctr_integ->key_len;
537 salt_len = sizeof (u32);
539 vec_append (s, sa->i_nonce);
540 vec_append (s, sa->r_nonce);
541 /* calculate PRFplus */
543 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
545 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
550 child->sk_ei = vec_new (u8, ctr_encr->key_len);
551 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
552 pos += ctr_encr->key_len;
557 child->sk_ai = vec_new (u8, ctr_integ->key_len);
558 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
559 pos += ctr_integ->key_len;
563 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
568 child->sk_er = vec_new (u8, ctr_encr->key_len);
569 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
570 pos += ctr_encr->key_len;
575 child->sk_ar = vec_new (u8, integ_key_len);
576 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
577 pos += integ_key_len;
581 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
591 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
595 u32 len = clib_net_to_host_u32 (ike->length);
596 u8 payload = ike->nextpayload;
598 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
599 "exchange %x flags %x msgid %x length %u",
600 clib_net_to_host_u64 (ike->ispi),
601 clib_net_to_host_u64 (ike->rspi),
602 payload, ike->version,
603 ike->exchange, ike->flags,
604 clib_net_to_host_u32 (ike->msgid), len);
606 sa->ispi = clib_net_to_host_u64 (ike->ispi);
608 /* store whole IKE payload - needed for PSK auth */
609 vec_free (sa->last_sa_init_req_packet_data);
610 vec_add (sa->last_sa_init_req_packet_data, ike, len);
612 while (p < len && payload != IKEV2_PAYLOAD_NONE)
614 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
615 u32 plen = clib_net_to_host_u16 (ikep->length);
617 if (plen < sizeof (ike_payload_header_t))
620 if (payload == IKEV2_PAYLOAD_SA)
622 ikev2_sa_free_proposal_vector (&sa->i_proposals);
623 sa->i_proposals = ikev2_parse_sa_payload (ikep);
625 else if (payload == IKEV2_PAYLOAD_KE)
627 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
628 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
629 vec_free (sa->i_dh_data);
630 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
632 else if (payload == IKEV2_PAYLOAD_NONCE)
634 vec_free (sa->i_nonce);
635 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
637 else if (payload == IKEV2_PAYLOAD_NOTIFY)
639 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
642 else if (payload == IKEV2_PAYLOAD_VENDOR)
644 ikev2_parse_vendor_payload (ikep);
648 clib_warning ("unknown payload %u flags %x length %u", payload,
650 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
652 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
653 sa->unsupported_cp = payload;
658 payload = ikep->nextpayload;
662 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
666 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
670 u32 len = clib_net_to_host_u32 (ike->length);
671 u8 payload = ike->nextpayload;
673 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
674 "exchange %x flags %x msgid %x length %u",
675 clib_net_to_host_u64 (ike->ispi),
676 clib_net_to_host_u64 (ike->rspi),
677 payload, ike->version,
678 ike->exchange, ike->flags,
679 clib_net_to_host_u32 (ike->msgid), len);
681 sa->ispi = clib_net_to_host_u64 (ike->ispi);
682 sa->rspi = clib_net_to_host_u64 (ike->rspi);
684 /* store whole IKE payload - needed for PSK auth */
685 vec_free (sa->last_sa_init_res_packet_data);
686 vec_add (sa->last_sa_init_res_packet_data, ike, len);
688 while (p < len && payload != IKEV2_PAYLOAD_NONE)
690 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
691 u32 plen = clib_net_to_host_u16 (ikep->length);
693 if (plen < sizeof (ike_payload_header_t))
696 if (payload == IKEV2_PAYLOAD_SA)
698 ikev2_sa_free_proposal_vector (&sa->r_proposals);
699 sa->r_proposals = ikev2_parse_sa_payload (ikep);
702 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
704 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
707 else if (payload == IKEV2_PAYLOAD_KE)
709 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
710 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
711 vec_free (sa->r_dh_data);
712 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
714 else if (payload == IKEV2_PAYLOAD_NONCE)
716 vec_free (sa->r_nonce);
717 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
719 else if (payload == IKEV2_PAYLOAD_NOTIFY)
721 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
724 else if (payload == IKEV2_PAYLOAD_VENDOR)
726 ikev2_parse_vendor_payload (ikep);
730 clib_warning ("unknown payload %u flags %x length %u", payload,
732 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
734 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
735 sa->unsupported_cp = payload;
740 payload = ikep->nextpayload;
746 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
751 u32 len = clib_net_to_host_u32 (ike->length);
752 ike_payload_header_t *ikep = 0;
754 ikev2_sa_transform_t *tr_integ;
756 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
759 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
761 ikep = (ike_payload_header_t *) & ike->payload[p];
762 plen = clib_net_to_host_u16 (ikep->length);
764 if (plen < sizeof (*ikep))
767 if (*payload == IKEV2_PAYLOAD_SK)
769 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
770 last_payload = *payload;
774 clib_warning ("unknown payload %u flags %x length %u", payload,
776 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
778 sa->unsupported_cp = *payload;
783 *payload = ikep->nextpayload;
787 if (last_payload != IKEV2_PAYLOAD_SK)
789 clib_warning ("Last payload must be SK");
794 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
795 (u8 *) ike, len - tr_integ->key_trunc);
797 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
799 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
801 clib_warning ("message integrity check failed");
807 return ikev2_decrypt_data (sa, ikep->payload, plen);
811 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
813 ikev2_main_t *km = &ikev2_main;
817 u32 thread_index = vlib_get_thread_index ();
819 if (!sa->initial_contact)
822 /* find old IKE SAs with the same authenticated identity */
824 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
825 if (tmp->i_id.type != sa->i_id.type ||
826 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
827 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
830 if (sa->rspi != tmp->rspi)
831 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
835 for (i = 0; i < vec_len (delete); i++)
838 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
840 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
842 ikev2_delete_sa (tmp);
846 sa->initial_contact = 0;
850 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
852 ikev2_child_sa_t *first_child_sa;
854 u32 len = clib_net_to_host_u32 (ike->length);
855 u8 payload = ike->nextpayload;
858 ike_payload_header_t *ikep;
861 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
862 "exchange %x flags %x msgid %x length %u",
863 clib_net_to_host_u64 (ike->ispi),
864 clib_net_to_host_u64 (ike->rspi),
865 payload, ike->version,
866 ike->exchange, ike->flags,
867 clib_net_to_host_u32 (ike->msgid), len);
869 ikev2_calc_keys (sa);
871 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
875 if (sa->unsupported_cp)
876 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
877 goto cleanup_and_exit;
880 /* select or create 1st child SA */
881 if (sa->is_initiator)
883 first_child_sa = &sa->childs[0];
887 ikev2_sa_free_all_child_sa (&sa->childs);
888 vec_add2 (sa->childs, first_child_sa, 1);
892 /* process encrypted payload */
894 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
896 ikep = (ike_payload_header_t *) & plaintext[p];
897 plen = clib_net_to_host_u16 (ikep->length);
899 if (plen < sizeof (ike_payload_header_t))
900 goto cleanup_and_exit;
902 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
904 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
905 if (sa->is_initiator)
907 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
908 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
912 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
913 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
916 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
918 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
920 sa->i_id.type = id->id_type;
921 vec_free (sa->i_id.data);
922 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
924 clib_warning ("received payload IDi, len %u id_type %u",
925 plen - sizeof (*id), id->id_type);
927 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
929 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
931 sa->r_id.type = id->id_type;
932 vec_free (sa->r_id.data);
933 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
935 clib_warning ("received payload IDr len %u id_type %u",
936 plen - sizeof (*id), id->id_type);
938 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
940 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
942 if (sa->is_initiator)
944 sa->r_auth.method = a->auth_method;
945 vec_free (sa->r_auth.data);
946 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
950 sa->i_auth.method = a->auth_method;
951 vec_free (sa->i_auth.data);
952 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
955 clib_warning ("received payload AUTH, len %u auth_type %u",
956 plen - sizeof (*a), a->auth_method);
958 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
960 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
961 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
963 sa->initial_contact = 1;
967 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
969 ikev2_parse_vendor_payload (ikep);
971 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
973 clib_warning ("received payload TSi, len %u",
974 plen - sizeof (*ikep));
976 vec_free (first_child_sa->tsi);
977 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
979 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
981 clib_warning ("received payload TSr, len %u",
982 plen - sizeof (*ikep));
984 vec_free (first_child_sa->tsr);
985 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
989 clib_warning ("unknown payload %u flags %x length %u data %u",
990 payload, ikep->flags, plen - 4,
991 format_hex_bytes, ikep->payload, plen - 4);
993 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
995 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
996 sa->unsupported_cp = payload;
1001 payload = ikep->nextpayload;
1006 vec_free (plaintext);
1010 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1014 u32 len = clib_net_to_host_u32 (ike->length);
1015 u8 payload = ike->nextpayload;
1018 ike_payload_header_t *ikep;
1021 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1022 "exchange %x flags %x msgid %x length %u",
1023 clib_net_to_host_u64 (ike->ispi),
1024 clib_net_to_host_u64 (ike->rspi),
1025 payload, ike->version,
1026 ike->exchange, ike->flags,
1027 clib_net_to_host_u32 (ike->msgid), len);
1029 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1032 goto cleanup_and_exit;
1034 /* process encrypted payload */
1036 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1038 ikep = (ike_payload_header_t *) & plaintext[p];
1039 plen = clib_net_to_host_u16 (ikep->length);
1041 if (plen < sizeof (ike_payload_header_t))
1042 goto cleanup_and_exit;
1044 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1046 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1047 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1048 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1051 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1053 sa->del = ikev2_parse_delete_payload (ikep);
1055 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1057 ikev2_parse_vendor_payload (ikep);
1061 clib_warning ("unknown payload %u flags %x length %u data %u",
1062 payload, ikep->flags, plen - 4,
1063 format_hex_bytes, ikep->payload, plen - 4);
1065 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1067 sa->unsupported_cp = payload;
1072 payload = ikep->nextpayload;
1077 vec_free (plaintext);
1081 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1085 u32 len = clib_net_to_host_u32 (ike->length);
1086 u8 payload = ike->nextpayload;
1089 u8 nonce[IKEV2_NONCE_SIZE];
1091 ike_payload_header_t *ikep;
1093 ikev2_notify_t *n = 0;
1094 ikev2_ts_t *tsi = 0;
1095 ikev2_ts_t *tsr = 0;
1096 ikev2_sa_proposal_t *proposal = 0;
1097 ikev2_child_sa_t *child_sa;
1099 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1100 "exchange %x flags %x msgid %x length %u",
1101 clib_net_to_host_u64 (ike->ispi),
1102 clib_net_to_host_u64 (ike->rspi),
1103 payload, ike->version,
1104 ike->exchange, ike->flags,
1105 clib_net_to_host_u32 (ike->msgid), len);
1107 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1110 goto cleanup_and_exit;
1112 /* process encrypted payload */
1114 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1116 ikep = (ike_payload_header_t *) & plaintext[p];
1117 plen = clib_net_to_host_u16 (ikep->length);
1119 if (plen < sizeof (ike_payload_header_t))
1120 goto cleanup_and_exit;
1122 else if (payload == IKEV2_PAYLOAD_SA)
1124 proposal = ikev2_parse_sa_payload (ikep);
1126 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1128 n = ikev2_parse_notify_payload (ikep);
1129 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1134 else if (payload == IKEV2_PAYLOAD_DELETE)
1136 sa->del = ikev2_parse_delete_payload (ikep);
1138 else if (payload == IKEV2_PAYLOAD_VENDOR)
1140 ikev2_parse_vendor_payload (ikep);
1142 else if (payload == IKEV2_PAYLOAD_NONCE)
1144 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1146 else if (payload == IKEV2_PAYLOAD_TSI)
1148 tsi = ikev2_parse_ts_payload (ikep);
1150 else if (payload == IKEV2_PAYLOAD_TSR)
1152 tsr = ikev2_parse_ts_payload (ikep);
1156 clib_warning ("unknown payload %u flags %x length %u data %u",
1157 payload, ikep->flags, plen - 4,
1158 format_hex_bytes, ikep->payload, plen - 4);
1160 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1162 sa->unsupported_cp = payload;
1167 payload = ikep->nextpayload;
1171 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1173 ikev2_rekey_t *rekey = &sa->rekey[0];
1174 rekey->protocol_id = proposal->protocol_id;
1176 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1177 rekey->i_proposal->spi = rekey->spi;
1178 rekey->r_proposal = proposal;
1182 vec_free (sa->r_nonce);
1183 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1184 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1187 child_sa->rekey_retries = 0;
1192 ikev2_rekey_t *rekey;
1193 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1196 clib_warning ("child SA spi %lx not found", n->spi);
1197 goto cleanup_and_exit;
1199 vec_add2 (sa->rekey, rekey, 1);
1200 rekey->protocol_id = n->protocol_id;
1201 rekey->spi = n->spi;
1202 rekey->i_proposal = proposal;
1204 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1208 vec_free (sa->i_nonce);
1209 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1210 /* generate new Nr */
1211 vec_free (sa->r_nonce);
1212 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1213 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1217 vec_free (plaintext);
1222 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1230 ikev2_sa_transform_t *tr_prf;
1233 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1239 nonce = sa->i_nonce;
1240 packet_data = sa->last_sa_init_res_packet_data;
1246 nonce = sa->r_nonce;
1247 packet_data = sa->last_sa_init_req_packet_data;
1250 data = vec_new (u8, 4);
1252 vec_append (data, id->data);
1254 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1255 vec_append (authmsg, packet_data);
1256 vec_append (authmsg, nonce);
1257 vec_append (authmsg, id_hash);
1265 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1267 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1268 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1269 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1270 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1277 ikev2_sa_match_ts (ikev2_sa_t * sa)
1279 ikev2_main_t *km = &ikev2_main;
1281 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1285 pool_foreach (p, km->profiles, ({
1287 if (sa->is_initiator)
1301 if (p->rem_id.type != id->type ||
1302 vec_len(p->rem_id.data) != vec_len(id->data) ||
1303 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1306 vec_foreach(ts, sa->childs[0].tsi)
1308 if (ikev2_ts_cmp(p_tsi, ts))
1310 vec_add1 (tsi, ts[0]);
1315 vec_foreach(ts, sa->childs[0].tsr)
1317 if (ikev2_ts_cmp(p_tsr, ts))
1319 vec_add1 (tsr, ts[0]);
1330 vec_free (sa->childs[0].tsi);
1331 vec_free (sa->childs[0].tsr);
1332 sa->childs[0].tsi = tsi;
1333 sa->childs[0].tsr = tsr;
1339 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1344 ikev2_sa_auth (ikev2_sa_t * sa)
1346 ikev2_main_t *km = &ikev2_main;
1347 ikev2_profile_t *p, *sel_p = 0;
1348 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1349 ikev2_sa_transform_t *tr_prf;
1352 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1354 /* only shared key and rsa signature */
1355 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1356 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1358 clib_warning ("unsupported authentication method %u",
1360 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1364 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1365 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1368 ikev2_auth_t *sa_auth;
1370 if (sa->is_initiator)
1373 sa_auth = &sa->r_auth;
1378 sa_auth = &sa->i_auth;
1382 pool_foreach (p, km->profiles, ({
1385 if (p->rem_id.type != sa_id->type ||
1386 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1387 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1390 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1392 if (!p->auth.data ||
1393 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1396 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1397 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1399 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1401 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1408 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1410 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1413 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1415 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1428 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1430 if (!sa->is_initiator)
1432 vec_free (sa->r_id.data);
1433 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1434 sa->r_id.type = sel_p->loc_id.type;
1436 /* generate our auth data */
1437 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1438 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1440 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1441 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1443 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1445 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1446 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1450 /* select transforms for 1st child sa */
1451 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1452 sa->childs[0].r_proposals =
1453 ikev2_select_proposal (sa->childs[0].i_proposals,
1454 IKEV2_PROTOCOL_ESP);
1459 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1467 ikev2_sa_auth_init (ikev2_sa_t * sa)
1469 ikev2_main_t *km = &ikev2_main;
1470 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1471 ikev2_sa_transform_t *tr_prf;
1474 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1476 /* only shared key and rsa signature */
1477 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1478 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1480 clib_warning ("unsupported authentication method %u",
1482 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1486 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1487 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1488 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1489 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1492 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1494 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1495 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1497 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1499 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1500 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1510 ikev2_mk_local_sa_id (u32 ti)
1512 return (0x80000000 | ti);
1516 ikev2_mk_remote_sa_id (u32 ti)
1518 return (0xc0000000 | ti);
1522 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1523 ikev2_child_sa_t * child)
1525 ikev2_main_t *km = &ikev2_main;
1526 ikev2_profile_t *p = 0;
1527 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1528 ikev2_sa_transform_t *tr;
1529 ikev2_sa_proposal_t *proposals;
1530 ipsec_sa_flags_t flags = 0;
1531 ipsec_crypto_alg_t encr_type;
1532 ipsec_integ_alg_t integ_type;
1533 u32 local_spi, remote_spi;
1535 u32 salt_local = 0, salt_remote = 0;
1536 ip46_address_t local_ip, remote_ip;
1539 if (!child->r_proposals)
1541 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1545 if (sa->is_initiator)
1547 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
1548 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
1549 proposals = child->i_proposals;
1550 local_spi = child->r_proposals[0].spi;
1551 remote_spi = child->i_proposals[0].spi;
1555 ip46_address_set_ip4 (&local_ip, &sa->raddr);
1556 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
1557 proposals = child->r_proposals;
1558 local_spi = child->i_proposals[0].spi;
1559 remote_spi = child->r_proposals[0].spi;
1562 flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1564 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1565 if (tr && tr->esn_type)
1566 flags |= IPSEC_SA_FLAG_USE_ESN;
1568 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1571 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1573 switch (tr->key_len)
1576 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1579 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1582 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1585 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1590 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1593 switch (tr->key_len)
1596 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1599 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1602 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1605 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1613 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1619 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1625 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1628 switch (tr->integ_type)
1630 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1631 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1633 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1634 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1636 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1637 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1639 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1640 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1643 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1649 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1655 integ_type = IPSEC_INTEG_ALG_NONE;
1658 ikev2_calc_child_keys (sa, child);
1660 if (sa->is_initiator)
1662 ipsec_mk_key (&loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1663 ipsec_mk_key (&rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1664 ipsec_mk_key (&loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1665 ipsec_mk_key (&rem_ckey, child->sk_er, vec_len (child->sk_er));
1668 salt_remote = child->salt_er;
1669 salt_local = child->salt_ei;
1674 ipsec_mk_key (&loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1675 ipsec_mk_key (&rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1676 ipsec_mk_key (&loc_ckey, child->sk_er, vec_len (child->sk_er));
1677 ipsec_mk_key (&rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1680 salt_remote = child->salt_ei;
1681 salt_local = child->salt_er;
1685 if (sa->is_profile_index_set)
1686 p = pool_elt_at_index (km->profiles, sa->profile_index);
1688 if (p && p->lifetime)
1690 child->time_to_expiration =
1691 vlib_time_now (vnm->vlib_main) + p->lifetime;
1692 if (p->lifetime_jitter)
1694 // This is not much better than rand(3), which Coverity warns
1695 // is unsuitable for security applications; random_u32 is
1696 // however fast. If this perturbance to the expiration time
1697 // needs to use a better RNG then we may need to use something
1698 // like /dev/urandom which has significant overhead.
1699 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1700 rnd = random_u32 (&rnd);
1702 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1706 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1707 &local_ip, &remote_ip, 0, 0, &child->sw_if_index);
1709 child->local_sa = ikev2_mk_local_sa_id (child->sw_if_index);
1710 child->remote_sa = ikev2_mk_remote_sa_id (child->sw_if_index);
1712 rv |= ipsec_sa_add_and_lock (child->local_sa,
1714 IPSEC_PROTOCOL_ESP, encr_type,
1715 &loc_ckey, integ_type, &loc_ikey, flags,
1716 0, salt_local, &local_ip, &remote_ip, NULL);
1717 rv |= ipsec_sa_add_and_lock (child->remote_sa,
1719 IPSEC_PROTOCOL_ESP, encr_type,
1720 &rem_ckey, integ_type, &rem_ikey,
1721 (flags | IPSEC_SA_FLAG_IS_INBOUND),
1722 0, salt_remote, &remote_ip, &local_ip, NULL);
1725 vec_add1 (sas_in, child->remote_sa);
1727 ipsec_tun_protect_update (child->sw_if_index, child->local_sa, sas_in);
1733 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1734 ikev2_child_sa_t * child)
1736 ipsec_tun_protect_del (child->sw_if_index);
1737 ipsec_sa_unlock_id (child->remote_sa);
1738 ipsec_sa_unlock_id (child->local_sa);
1739 ipip_del_tunnel (child->sw_if_index);
1744 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1747 ike_payload_header_t *ph;
1751 ikev2_sa_transform_t *tr_encr, *tr_integ;
1753 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1755 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1757 ikev2_payload_chain_t *chain = 0;
1758 ikev2_payload_new_chain (chain);
1760 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1762 if (sa->r_proposals == 0)
1764 ikev2_payload_add_notify (chain,
1765 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1766 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1768 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1770 u8 *data = vec_new (u8, 2);
1771 ikev2_sa_transform_t *tr_dh;
1773 ikev2_sa_get_td_for_type (sa->r_proposals,
1774 IKEV2_TRANSFORM_TYPE_DH);
1775 ASSERT (tr_dh && tr_dh->dh_type);
1777 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1778 data[1] = (tr_dh->dh_type) & 0xff;
1780 ikev2_payload_add_notify (chain,
1781 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1784 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1786 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1788 u8 *data = vec_new (u8, 1);
1790 data[0] = sa->unsupported_cp;
1791 ikev2_payload_add_notify (chain,
1792 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1798 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1799 ikev2_payload_add_sa (chain, sa->r_proposals);
1800 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1801 ikev2_payload_add_nonce (chain, sa->r_nonce);
1804 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1806 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1808 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1809 ikev2_payload_add_auth (chain, &sa->r_auth);
1810 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1811 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1812 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1814 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1816 ikev2_payload_add_notify (chain,
1817 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1819 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1821 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1823 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1825 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1826 ikev2_payload_add_auth (chain, &sa->r_auth);
1828 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1830 ikev2_payload_add_notify (chain,
1831 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1832 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1833 ikev2_payload_add_auth (chain, &sa->r_auth);
1834 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1835 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1837 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1839 u8 *data = vec_new (u8, 1);
1841 data[0] = sa->unsupported_cp;
1842 ikev2_payload_add_notify (chain,
1843 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1847 else if (sa->state == IKEV2_STATE_SA_INIT)
1849 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1850 ikev2_payload_add_auth (chain, &sa->i_auth);
1851 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1852 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1853 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1857 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1861 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1863 /* if pending delete */
1866 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1868 if (sa->is_initiator)
1869 ikev2_payload_add_delete (chain, sa->del);
1871 /* The response to a request that deletes the IKE SA is an empty
1872 INFORMATIONAL response. */
1873 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1875 /* The response to a request that deletes ESP or AH SAs will contain
1876 delete payloads for the paired SAs going in the other direction. */
1879 ikev2_payload_add_delete (chain, sa->del);
1884 /* received N(AUTHENTICATION_FAILED) */
1885 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1887 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1890 /* received unsupported critical payload */
1891 else if (sa->unsupported_cp)
1893 u8 *data = vec_new (u8, 1);
1895 data[0] = sa->unsupported_cp;
1896 ikev2_payload_add_notify (chain,
1897 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1900 sa->unsupported_cp = 0;
1902 /* else send empty response */
1904 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1906 if (sa->is_initiator)
1909 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1910 ikev2_notify_t notify;
1911 u8 *data = vec_new (u8, 4);
1912 clib_memset (¬ify, 0, sizeof (notify));
1913 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1914 notify.spi = sa->childs[0].i_proposals->spi;
1915 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1917 ikev2_payload_add_sa (chain, proposals);
1918 ikev2_payload_add_nonce (chain, sa->i_nonce);
1919 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1920 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1921 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1930 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1931 ikev2_payload_add_nonce (chain, sa->r_nonce);
1932 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1934 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1936 vec_del1 (sa->rekey, 0);
1938 else if (sa->unsupported_cp)
1940 u8 *data = vec_new (u8, 1);
1942 data[0] = sa->unsupported_cp;
1943 ikev2_payload_add_notify (chain,
1944 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1947 sa->unsupported_cp = 0;
1951 ikev2_payload_add_notify (chain,
1952 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1959 ike->version = IKE_VERSION_2;
1960 ike->nextpayload = IKEV2_PAYLOAD_SK;
1961 tlen = sizeof (*ike);
1962 if (sa->is_initiator)
1964 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1965 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1969 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1973 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1975 tlen += vec_len (chain->data);
1976 ike->nextpayload = chain->first_payload_type;
1977 ike->length = clib_host_to_net_u32 (tlen);
1978 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
1980 /* store whole IKE payload - needed for PSK auth */
1981 vec_free (sa->last_sa_init_res_packet_data);
1982 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1987 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1990 plen = sizeof (*ph);
1991 ph = (ike_payload_header_t *) & ike->payload[0];
1992 ph->nextpayload = chain->first_payload_type;
1994 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1997 /* add space for hmac */
1998 plen += tr_integ->key_trunc;
2001 /* payload and total length */
2002 ph->length = clib_host_to_net_u16 (plen);
2003 ike->length = clib_host_to_net_u32 (tlen);
2005 /* calc integrity data for whole packet except hash itself */
2007 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2008 (u8 *) ike, tlen - tr_integ->key_trunc);
2010 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2011 sizeof (*ike), integ, tr_integ->key_trunc);
2013 /* store whole IKE payload - needed for retransmit */
2014 vec_free (sa->last_res_packet_data);
2015 vec_add (sa->last_res_packet_data, ike, tlen);
2019 ikev2_payload_destroy_chain (chain);
2025 ikev2_retransmit_sa_init (ike_header_t * ike,
2026 ip4_address_t iaddr, ip4_address_t raddr)
2028 ikev2_main_t *km = &ikev2_main;
2030 u32 thread_index = vlib_get_thread_index ();
2033 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2034 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2035 sa->iaddr.as_u32 == iaddr.as_u32 &&
2036 sa->raddr.as_u32 == raddr.as_u32)
2039 u32 len = clib_net_to_host_u32(ike->length);
2040 u8 payload = ike->nextpayload;
2042 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2043 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2044 u32 plen = clib_net_to_host_u16(ikep->length);
2046 if (plen < sizeof(ike_payload_header_t))
2049 if (payload == IKEV2_PAYLOAD_NONCE)
2051 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2053 /* req is retransmit */
2054 if (sa->state == IKEV2_STATE_SA_INIT)
2057 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2058 ike->ispi = tmp->ispi;
2059 ike->rspi = tmp->rspi;
2060 ike->nextpayload = tmp->nextpayload;
2061 ike->version = tmp->version;
2062 ike->exchange = tmp->exchange;
2063 ike->flags = tmp->flags;
2064 ike->msgid = tmp->msgid;
2065 ike->length = tmp->length;
2066 clib_memcpy_fast(ike->payload, tmp->payload,
2067 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2068 clib_warning("IKE_SA_INIT retransmit from %U to %U",
2069 format_ip4_address, &raddr,
2070 format_ip4_address, &iaddr);
2073 /* else ignore req */
2076 clib_warning("IKE_SA_INIT ignore from %U to %U",
2077 format_ip4_address, &raddr,
2078 format_ip4_address, &iaddr);
2083 payload = ikep->nextpayload;
2090 /* req is not retransmit */
2095 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2097 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2100 if (msg_id > sa->last_msg_id)
2102 sa->last_msg_id = msg_id;
2105 /* retransmitted req */
2106 else if (msg_id == sa->last_msg_id)
2109 tmp = (ike_header_t *) sa->last_res_packet_data;
2110 ike->ispi = tmp->ispi;
2111 ike->rspi = tmp->rspi;
2112 ike->nextpayload = tmp->nextpayload;
2113 ike->version = tmp->version;
2114 ike->exchange = tmp->exchange;
2115 ike->flags = tmp->flags;
2116 ike->msgid = tmp->msgid;
2117 ike->length = tmp->length;
2118 clib_memcpy_fast (ike->payload, tmp->payload,
2119 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2120 clib_warning ("IKE msgid %u retransmit from %U to %U",
2122 format_ip4_address, &sa->raddr,
2123 format_ip4_address, &sa->iaddr);
2126 /* old req ignore */
2129 clib_warning ("IKE msgid %u req ignore from %U to %U",
2131 format_ip4_address, &sa->raddr,
2132 format_ip4_address, &sa->iaddr);
2139 ikev2_node_fn (vlib_main_t * vm,
2140 vlib_node_runtime_t * node, vlib_frame_t * frame)
2142 u32 n_left_from, *from, *to_next;
2143 ikev2_next_t next_index;
2144 ikev2_main_t *km = &ikev2_main;
2145 u32 thread_index = vlib_get_thread_index ();
2147 from = vlib_frame_vector_args (frame);
2148 n_left_from = frame->n_vectors;
2149 next_index = node->cached_next_index;
2151 while (n_left_from > 0)
2155 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2157 while (n_left_from > 0 && n_left_to_next > 0)
2161 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2166 ikev2_sa_t *sa0 = 0;
2167 ikev2_sa_t sa; /* temporary store for SA */
2171 /* speculatively enqueue b0 to the current next frame */
2177 n_left_to_next -= 1;
2179 b0 = vlib_get_buffer (vm, bi0);
2180 ike0 = vlib_buffer_get_current (b0);
2181 vlib_buffer_advance (b0, -sizeof (*udp0));
2182 udp0 = vlib_buffer_get_current (b0);
2183 vlib_buffer_advance (b0, -sizeof (*ip40));
2184 ip40 = vlib_buffer_get_current (b0);
2186 if (ike0->version != IKE_VERSION_2)
2188 vlib_node_increment_counter (vm, ikev2_node.index,
2189 IKEV2_ERROR_NOT_IKEV2, 1);
2193 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2196 clib_memset (sa0, 0, sizeof (*sa0));
2198 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2200 if (ike0->rspi == 0)
2202 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2203 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2205 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2209 vlib_node_increment_counter (vm, ikev2_node.index,
2210 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2212 len = clib_net_to_host_u32 (ike0->length);
2217 vlib_node_increment_counter (vm, ikev2_node.index,
2218 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2223 ikev2_process_sa_init_req (vm, sa0, ike0);
2225 if (sa0->state == IKEV2_STATE_SA_INIT)
2227 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2229 ikev2_select_proposal (sa0->i_proposals,
2230 IKEV2_PROTOCOL_IKE);
2231 ikev2_generate_sa_init_data (sa0);
2234 if (sa0->state == IKEV2_STATE_SA_INIT
2235 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2237 len = ikev2_generate_message (sa0, ike0, 0);
2240 if (sa0->state == IKEV2_STATE_SA_INIT)
2242 /* add SA to the pool */
2243 pool_get (km->per_thread_data[thread_index].sas,
2245 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2247 per_thread_data[thread_index].sa_by_rspi,
2250 km->per_thread_data[thread_index].sas);
2254 ikev2_sa_free_all_vec (sa0);
2258 else //received sa_init without initiator flag
2260 ikev2_process_sa_init_resp (vm, sa0, ike0);
2262 if (sa0->state == IKEV2_STATE_SA_INIT)
2264 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2265 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2269 pool_elt_at_index (km->sais, p[0]);
2271 ikev2_complete_sa_data (sa0, sai);
2272 ikev2_calc_keys (sa0);
2273 ikev2_sa_auth_init (sa0);
2274 len = ikev2_generate_message (sa0, ike0, 0);
2278 if (sa0->state == IKEV2_STATE_SA_INIT)
2280 /* add SA to the pool */
2281 pool_get (km->per_thread_data[thread_index].sas, sa0);
2282 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2283 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2285 sa0 - km->per_thread_data[thread_index].sas);
2289 ikev2_sa_free_all_vec (sa0);
2293 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2296 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2297 clib_net_to_host_u64 (ike0->rspi));
2301 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2304 r = ikev2_retransmit_resp (sa0, ike0);
2307 vlib_node_increment_counter (vm, ikev2_node.index,
2308 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2310 len = clib_net_to_host_u32 (ike0->length);
2315 vlib_node_increment_counter (vm, ikev2_node.index,
2316 IKEV2_ERROR_IKE_REQ_IGNORE,
2321 ikev2_process_auth_req (vm, sa0, ike0);
2322 ikev2_sa_auth (sa0);
2323 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2325 ikev2_initial_contact_cleanup (sa0);
2326 ikev2_sa_match_ts (sa0);
2327 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2328 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2332 if (sa0->is_initiator)
2334 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2338 pool_elt_at_index (km->sais, p[0]);
2339 hash_unset (km->sa_by_ispi, sai->ispi);
2340 ikev2_sa_free_all_vec (sai);
2341 pool_put (km->sais, sai);
2346 len = ikev2_generate_message (sa0, ike0, 0);
2350 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2353 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2354 clib_net_to_host_u64 (ike0->rspi));
2358 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2361 r = ikev2_retransmit_resp (sa0, ike0);
2364 vlib_node_increment_counter (vm, ikev2_node.index,
2365 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2367 len = clib_net_to_host_u32 (ike0->length);
2372 vlib_node_increment_counter (vm, ikev2_node.index,
2373 IKEV2_ERROR_IKE_REQ_IGNORE,
2378 ikev2_process_informational_req (vm, sa0, ike0);
2381 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2383 ikev2_delete_t *d, *tmp, *resp = 0;
2384 vec_foreach (d, sa0->del)
2386 ikev2_child_sa_t *ch_sa;
2387 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2389 !sa0->is_initiator);
2392 ikev2_delete_tunnel_interface (km->vnet_main,
2394 if (!sa0->is_initiator)
2396 vec_add2 (resp, tmp, 1);
2397 tmp->protocol_id = d->protocol_id;
2398 tmp->spi = ch_sa->r_proposals[0].spi;
2400 ikev2_sa_del_child_sa (sa0, ch_sa);
2403 if (!sa0->is_initiator)
2405 vec_free (sa0->del);
2410 if (!sa0->is_initiator)
2412 len = ikev2_generate_message (sa0, ike0, 0);
2416 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2419 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2420 clib_net_to_host_u64 (ike0->rspi));
2424 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2427 r = ikev2_retransmit_resp (sa0, ike0);
2430 vlib_node_increment_counter (vm, ikev2_node.index,
2431 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2433 len = clib_net_to_host_u32 (ike0->length);
2438 vlib_node_increment_counter (vm, ikev2_node.index,
2439 IKEV2_ERROR_IKE_REQ_IGNORE,
2444 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2447 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2449 ikev2_child_sa_t *child;
2450 vec_add2 (sa0->childs, child, 1);
2451 child->r_proposals = sa0->rekey[0].r_proposal;
2452 child->i_proposals = sa0->rekey[0].i_proposal;
2453 child->tsi = sa0->rekey[0].tsi;
2454 child->tsr = sa0->rekey[0].tsr;
2455 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2458 if (sa0->is_initiator)
2460 vec_del1 (sa0->rekey, 0);
2464 len = ikev2_generate_message (sa0, ike0, 0);
2471 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2473 format_ip4_address, ip40->src_address.as_u8,
2474 format_ip4_address, ip40->dst_address.as_u8);
2478 /* if we are sending packet back, rewrite headers */
2481 next0 = IKEV2_NEXT_IP4_LOOKUP;
2482 if (sa0->is_initiator)
2484 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2485 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2489 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2490 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2493 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2495 b0->current_length =
2496 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2497 ip40->length = clib_host_to_net_u16 (b0->current_length);
2498 ip40->checksum = ip4_header_checksum (ip40);
2501 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2502 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2504 ikev2_child_sa_t *c;
2506 vec_foreach (c, sa0->childs)
2507 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2509 ikev2_delete_sa (sa0);
2511 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2513 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2514 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2516 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2517 t->sw_if_index = sw_if_index0;
2518 t->next_index = next0;
2521 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2522 n_left_to_next, bi0, next0);
2525 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2528 vlib_node_increment_counter (vm, ikev2_node.index,
2529 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2530 return frame->n_vectors;
2534 VLIB_REGISTER_NODE (ikev2_node,static) = {
2535 .function = ikev2_node_fn,
2537 .vector_size = sizeof (u32),
2538 .format_trace = format_ikev2_trace,
2539 .type = VLIB_NODE_TYPE_INTERNAL,
2541 .n_errors = ARRAY_LEN(ikev2_error_strings),
2542 .error_strings = ikev2_error_strings,
2544 .n_next_nodes = IKEV2_N_NEXT,
2547 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2548 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2553 // set ikev2 proposals when vpp is used as initiator
2554 static clib_error_t *
2555 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2556 ikev2_transforms_set * ts,
2557 ikev2_sa_proposal_t ** proposals, int is_ike)
2560 ikev2_main_t *km = &ikev2_main;
2561 ikev2_sa_proposal_t *proposal;
2562 vec_add2 (*proposals, proposal, 1);
2563 ikev2_sa_transform_t *td;
2568 vec_foreach (td, km->supported_transforms)
2570 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2571 && td->encr_type == ts->crypto_alg
2572 && td->key_len == ts->crypto_key_size / 8)
2575 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2576 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2577 vec_add (td->attrs, (u8 *) attr, 4);
2578 vec_add1 (proposal->transforms, *td);
2587 r = clib_error_return (0, "Unsupported algorithm");
2593 vec_foreach (td, km->supported_transforms)
2595 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2596 && td->integ_type == ts->integ_alg)
2598 vec_add1 (proposal->transforms, *td);
2606 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2607 r = clib_error_return (0, "Unsupported algorithm");
2615 vec_foreach (td, km->supported_transforms)
2617 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2618 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2620 vec_add1 (proposal->transforms, *td);
2627 r = clib_error_return (0, "Unsupported algorithm");
2633 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2636 vec_foreach (td, km->supported_transforms)
2638 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2640 vec_add1 (proposal->transforms, *td);
2643 sa->dh_group = td->dh_type;
2651 r = clib_error_return (0, "Unsupported algorithm");
2659 vec_foreach (td, km->supported_transforms)
2661 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2663 vec_add1 (proposal->transforms, *td);
2670 r = clib_error_return (0, "Unsupported algorithm");
2679 static ikev2_profile_t *
2680 ikev2_profile_index_by_name (u8 * name)
2682 ikev2_main_t *km = &ikev2_main;
2685 p = mhash_get (&km->profile_index_by_name, name);
2689 return pool_elt_at_index (km->profiles, p[0]);
2694 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2703 b0 = vlib_get_buffer (vm, bi0);
2704 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2705 udp0 = vlib_buffer_get_current (b0);
2706 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2707 ip40 = vlib_buffer_get_current (b0);
2710 ip40->ip_version_and_header_length = 0x45;
2712 ip40->fragment_id = 0;
2713 ip40->flags_and_fragment_offset = 0;
2715 ip40->protocol = IP_PROTOCOL_UDP;
2716 ip40->dst_address.as_u32 = dst->as_u32;
2717 ip40->src_address.as_u32 = src->as_u32;
2718 udp0->dst_port = clib_host_to_net_u16 (500);
2719 udp0->src_port = clib_host_to_net_u16 (500);
2720 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2722 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2723 ip40->length = clib_host_to_net_u16 (b0->current_length);
2724 ip40->checksum = ip4_header_checksum (ip40);
2727 /* send the request */
2728 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2729 to_next = vlib_frame_vector_args (f);
2732 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2737 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2740 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2745 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2746 *ike = vlib_buffer_get_current (b0);
2751 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2753 ikev2_main_t *km = &ikev2_main;
2755 km->pkey = ikev2_load_key_file (file);
2756 if (km->pkey == NULL)
2757 return clib_error_return (0, "load key '%s' failed", file);
2763 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2765 ikev2_main_t *km = &ikev2_main;
2770 if (ikev2_profile_index_by_name (name))
2771 return clib_error_return (0, "policy %v already exists", name);
2773 pool_get (km->profiles, p);
2774 clib_memset (p, 0, sizeof (*p));
2775 p->name = vec_dup (name);
2776 p->responder.sw_if_index = ~0;
2777 uword index = p - km->profiles;
2778 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2782 p = ikev2_profile_index_by_name (name);
2784 return clib_error_return (0, "policy %v does not exists", name);
2787 pool_put (km->profiles, p);
2788 mhash_unset (&km->profile_index_by_name, name, 0);
2794 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2795 u8 * auth_data, u8 data_hex_format)
2800 p = ikev2_profile_index_by_name (name);
2804 r = clib_error_return (0, "unknown profile %v", name);
2807 vec_free (p->auth.data);
2808 p->auth.method = auth_method;
2809 p->auth.data = vec_dup (auth_data);
2810 p->auth.hex = data_hex_format;
2812 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2814 vec_add1 (p->auth.data, 0);
2816 EVP_PKEY_free (p->auth.key);
2817 p->auth.key = ikev2_load_cert_file (auth_data);
2818 if (p->auth.key == NULL)
2819 return clib_error_return (0, "load cert '%s' failed", auth_data);
2826 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2832 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2833 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2835 r = clib_error_return (0, "unsupported identity type %U",
2836 format_ikev2_id_type, id_type);
2840 p = ikev2_profile_index_by_name (name);
2844 r = clib_error_return (0, "unknown profile %v", name);
2850 vec_free (p->loc_id.data);
2851 p->loc_id.type = id_type;
2852 p->loc_id.data = vec_dup (data);
2856 vec_free (p->rem_id.data);
2857 p->rem_id.type = id_type;
2858 p->rem_id.data = vec_dup (data);
2865 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2866 u16 start_port, u16 end_port, ip4_address_t start_addr,
2867 ip4_address_t end_addr, int is_local)
2872 p = ikev2_profile_index_by_name (name);
2876 r = clib_error_return (0, "unknown profile %v", name);
2882 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2883 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2884 p->loc_ts.start_port = start_port;
2885 p->loc_ts.end_port = end_port;
2886 p->loc_ts.protocol_id = protocol_id;
2887 p->loc_ts.ts_type = 7;
2891 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2892 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2893 p->rem_ts.start_port = start_port;
2894 p->rem_ts.end_port = end_port;
2895 p->rem_ts.protocol_id = protocol_id;
2896 p->rem_ts.ts_type = 7;
2904 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2905 u32 sw_if_index, ip4_address_t ip4)
2910 p = ikev2_profile_index_by_name (name);
2914 r = clib_error_return (0, "unknown profile %v", name);
2918 p->responder.sw_if_index = sw_if_index;
2919 p->responder.ip4 = ip4;
2925 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2926 ikev2_transform_encr_type_t crypto_alg,
2927 ikev2_transform_integ_type_t integ_alg,
2928 ikev2_transform_dh_type_t dh_type,
2929 u32 crypto_key_size)
2934 p = ikev2_profile_index_by_name (name);
2938 r = clib_error_return (0, "unknown profile %v", name);
2942 p->ike_ts.crypto_alg = crypto_alg;
2943 p->ike_ts.integ_alg = integ_alg;
2944 p->ike_ts.dh_type = dh_type;
2945 p->ike_ts.crypto_key_size = crypto_key_size;
2950 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2951 ikev2_transform_encr_type_t crypto_alg,
2952 ikev2_transform_integ_type_t integ_alg,
2953 ikev2_transform_dh_type_t dh_type,
2954 u32 crypto_key_size)
2959 p = ikev2_profile_index_by_name (name);
2963 r = clib_error_return (0, "unknown profile %v", name);
2967 p->esp_ts.crypto_alg = crypto_alg;
2968 p->esp_ts.integ_alg = integ_alg;
2969 p->esp_ts.dh_type = dh_type;
2970 p->esp_ts.crypto_key_size = crypto_key_size;
2975 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2976 u64 lifetime, u32 jitter, u32 handover,
2982 p = ikev2_profile_index_by_name (name);
2986 r = clib_error_return (0, "unknown profile %v", name);
2990 p->lifetime = lifetime;
2991 p->lifetime_jitter = jitter;
2992 p->handover = handover;
2993 p->lifetime_maxdata = maxdata;
2998 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3002 ip4_main_t *im = &ip4_main;
3003 ikev2_main_t *km = &ikev2_main;
3005 p = ikev2_profile_index_by_name (name);
3009 r = clib_error_return (0, "unknown profile %v", name);
3013 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3015 r = clib_error_return (0, "responder not set for profile %v", name);
3020 /* Create the Initiator Request */
3024 ip_lookup_main_t *lm = &im->lookup_main;
3026 int len = sizeof (ike_header_t);
3028 /* Get own iface IP */
3030 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3031 ip_interface_address_t *if_add =
3032 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3033 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3035 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3037 /* Prepare the SA and the IKE payload */
3039 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3040 ikev2_payload_chain_t *chain = 0;
3041 ikev2_payload_new_chain (chain);
3043 /* Build the IKE proposal payload */
3044 ikev2_sa_proposal_t *proposals = 0;
3045 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3046 proposals[0].proposal_num = 1;
3047 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3049 /* Add and then cleanup proposal data */
3050 ikev2_payload_add_sa (chain, proposals);
3051 ikev2_sa_free_proposal_vector (&proposals);
3053 sa.is_initiator = 1;
3054 sa.profile_index = km->profiles - p;
3055 sa.is_profile_index_set = 1;
3056 sa.state = IKEV2_STATE_SA_INIT;
3057 ikev2_generate_sa_init_data (&sa);
3058 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3059 ikev2_payload_add_nonce (chain, sa.i_nonce);
3061 /* Build the child SA proposal */
3062 vec_resize (sa.childs, 1);
3063 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3064 &sa.childs[0].i_proposals, 0);
3065 sa.childs[0].i_proposals[0].proposal_num = 1;
3066 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3067 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3068 sizeof (sa.childs[0].i_proposals[0].spi));
3072 /* Add NAT detection notification messages (mandatory) */
3073 u8 nat_detection_source[8 + 8 + 4 + 2];
3074 u8 *nat_detection_sha1 = vec_new (u8, 20);
3076 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3077 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3078 tmpspi = clib_host_to_net_u64 (sa.rspi);
3079 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3080 u16 tmpport = clib_host_to_net_u16 (500);
3081 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3083 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3084 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3085 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3086 nat_detection_sha1);
3087 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3088 nat_detection_sha1);
3089 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3090 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3091 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3092 nat_detection_sha1);
3093 ikev2_payload_add_notify (chain,
3094 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3095 nat_detection_sha1);
3096 vec_free (nat_detection_sha1);
3098 u8 *sig_hash_algo = vec_new (u8, 8);
3099 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3100 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3101 ikev2_payload_add_notify (chain,
3102 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3104 vec_free (sig_hash_algo);
3107 /* Buffer update and boilerplate */
3108 len += vec_len (chain->data);
3109 ike0->nextpayload = chain->first_payload_type;
3110 ike0->length = clib_host_to_net_u32 (len);
3111 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3112 ikev2_payload_destroy_chain (chain);
3114 ike0->version = IKE_VERSION_2;
3115 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3116 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3117 ike0->ispi = sa.ispi;
3121 /* store whole IKE payload - needed for PSK auth */
3122 vec_free (sa.last_sa_init_req_packet_data);
3123 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3125 /* add data to the SA then add it to the pool */
3126 sa.iaddr.as_u32 = if_ip->as_u32;
3127 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3128 sa.i_id.type = p->loc_id.type;
3129 sa.i_id.data = vec_dup (p->loc_id.data);
3130 sa.i_auth.method = p->auth.method;
3131 sa.i_auth.hex = p->auth.hex;
3132 sa.i_auth.data = vec_dup (p->auth.data);
3133 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3134 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3136 /* add SA to the pool */
3137 ikev2_sa_t *sa0 = 0;
3138 pool_get (km->sais, sa0);
3139 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3140 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3142 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3150 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3151 ikev2_child_sa_t * csa)
3153 /* Create the Initiator notification for child SA removal */
3154 ikev2_main_t *km = &ikev2_main;
3159 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3162 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3163 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3164 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3165 vec_resize (sa->del, 1);
3166 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3167 sa->del->spi = csa->i_proposals->spi;
3168 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3169 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3170 len = ikev2_generate_message (sa, ike0, 0);
3172 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3174 /* delete local child SA */
3175 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3176 ikev2_sa_del_child_sa (sa, csa);
3180 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3183 ikev2_main_t *km = &ikev2_main;
3184 ikev2_main_per_thread_data_t *tkm;
3185 ikev2_sa_t *fsa = 0;
3186 ikev2_child_sa_t *fchild = 0;
3188 /* Search for the child SA */
3189 vec_foreach (tkm, km->per_thread_data)
3195 pool_foreach (sa, tkm->sas, ({
3196 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3206 if (!fchild || !fsa)
3208 r = clib_error_return (0, "Child SA not found");
3213 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3220 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3223 ikev2_main_t *km = &ikev2_main;
3224 ikev2_main_per_thread_data_t *tkm;
3225 ikev2_sa_t *fsa = 0;
3226 ikev2_main_per_thread_data_t *ftkm = 0;
3228 /* Search for the IKE SA */
3229 vec_foreach (tkm, km->per_thread_data)
3235 pool_foreach (sa, tkm->sas, ({
3236 if (sa->ispi == ispi)
3248 r = clib_error_return (0, "IKE SA not found");
3253 /* Create the Initiator notification for IKE SA removal */
3259 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3262 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3263 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3264 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3265 vec_resize (fsa->del, 1);
3266 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3267 fsa->del->spi = ispi;
3268 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3269 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3270 len = ikev2_generate_message (fsa, ike0, 0);
3272 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3276 /* delete local SA */
3277 ikev2_child_sa_t *c;
3278 vec_foreach (c, fsa->childs)
3280 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3281 ikev2_sa_del_child_sa (fsa, c);
3283 ikev2_sa_free_all_vec (fsa);
3284 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3287 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3288 pool_put (ftkm->sas, fsa);
3296 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3297 ikev2_child_sa_t * csa)
3299 /* Create the Initiator request for create child SA */
3305 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3308 ike0->version = IKE_VERSION_2;
3309 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3310 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3311 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3312 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3313 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3314 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3316 ikev2_rekey_t *rekey;
3317 vec_add2 (sa->rekey, rekey, 1);
3318 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3321 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3322 rekey->spi = proposals[0].spi;
3323 rekey->ispi = csa->i_proposals->spi;
3324 len = ikev2_generate_message (sa, ike0, proposals);
3325 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3326 vec_free (proposals);
3330 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3333 ikev2_main_t *km = &ikev2_main;
3334 ikev2_main_per_thread_data_t *tkm;
3335 ikev2_sa_t *fsa = 0;
3336 ikev2_child_sa_t *fchild = 0;
3338 /* Search for the child SA */
3339 vec_foreach (tkm, km->per_thread_data)
3345 pool_foreach (sa, tkm->sas, ({
3346 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3356 if (!fchild || !fsa)
3358 r = clib_error_return (0, "Child SA not found");
3363 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3370 ikev2_init (vlib_main_t * vm)
3372 ikev2_main_t *km = &ikev2_main;
3373 vlib_thread_main_t *tm = vlib_get_thread_main ();
3376 clib_memset (km, 0, sizeof (ikev2_main_t));
3377 km->vnet_main = vnet_get_main ();
3380 ikev2_crypto_init (km);
3382 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3384 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3385 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3387 km->per_thread_data[thread_id].sa_by_rspi =
3388 hash_create (0, sizeof (uword));
3391 km->sa_by_ispi = hash_create (0, sizeof (uword));
3393 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3395 ikev2_cli_reference ();
3401 VLIB_INIT_FUNCTION (ikev2_init) =
3403 .runs_after = VLIB_INITS("ipsec_init"),
3409 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3411 ikev2_main_t *km = &ikev2_main;
3412 ikev2_profile_t *p = 0;
3413 vlib_main_t *vm = km->vlib_main;
3414 f64 now = vlib_time_now (vm);
3417 if (sa->is_profile_index_set)
3418 p = pool_elt_at_index (km->profiles, sa->profile_index);
3420 if (sa->is_initiator && p && csa->time_to_expiration
3421 && now > csa->time_to_expiration)
3423 if (!csa->is_expired || csa->rekey_retries > 0)
3425 ikev2_rekey_child_sa_internal (vm, sa, csa);
3426 csa->time_to_expiration = now + p->handover;
3427 csa->is_expired = 1;
3428 if (csa->rekey_retries == 0)
3430 csa->rekey_retries = 5;
3432 else if (csa->rekey_retries > 0)
3434 csa->rekey_retries--;
3435 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3436 csa->i_proposals->spi, csa->rekey_retries);
3437 if (csa->rekey_retries == 0)
3439 csa->rekey_retries = -1;
3446 csa->time_to_expiration = 0;
3447 ikev2_delete_child_sa_internal (vm, sa, csa);
3456 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3458 ikev2_main_t *km = &ikev2_main;
3459 vlib_main_t *vm = km->vlib_main;
3460 ikev2_main_per_thread_data_t *tkm;
3461 ikev2_sa_t *fsa = 0;
3462 ikev2_profile_t *p = 0;
3463 ikev2_child_sa_t *fchild = 0;
3464 f64 now = vlib_time_now (vm);
3465 vlib_counter_t counts;
3467 /* Search for the SA and child SA */
3468 vec_foreach (tkm, km->per_thread_data)
3474 pool_foreach (sa, tkm->sas, ({
3475 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3484 vlib_get_combined_counter (&ipsec_sa_counters,
3485 ipsec_sa->stat_index, &counts);
3487 if (fsa && fsa->is_profile_index_set)
3488 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3490 if (fchild && p && p->lifetime_maxdata)
3492 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3494 fchild->time_to_expiration = now;
3499 static vlib_node_registration_t ikev2_mngr_process_node;
3502 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3505 ikev2_main_t *km = &ikev2_main;
3506 ipsec_main_t *im = &ipsec_main;
3511 vlib_process_wait_for_event_or_clock (vm, 1);
3512 vlib_process_get_events (vm, NULL);
3514 /* process ike child sas */
3515 ikev2_main_per_thread_data_t *tkm;
3516 vec_foreach (tkm, km->per_thread_data)
3520 pool_foreach (sa, tkm->sas, ({
3521 ikev2_child_sa_t *c;
3522 vec_foreach (c, sa->childs)
3524 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3530 /* process ipsec sas */
3533 pool_foreach (sa, im->sad, ({
3534 ikev2_mngr_process_ipsec_sa(sa);
3540 vlib_process_wait_for_event_or_clock (vm, 5);
3541 vlib_process_get_events (vm, NULL);
3550 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3551 .function = ikev2_mngr_process_fn,
3552 .type = VLIB_NODE_TYPE_PROCESS,
3554 "ikev2-manager-process",
3557 VLIB_PLUGIN_REGISTER () = {
3558 .version = VPP_BUILD_VER,
3559 .description = "Internet Key Exchange (IKEv2) Protocol",
3564 * fd.io coding-style-patch-verification: ON
3567 * eval: (c-set-style "gnu")