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 <plugins/ikev2/ikev2.h>
26 #include <plugins/ikev2/ikev2_priv.h>
27 #include <openssl/sha.h>
29 ikev2_main_t ikev2_main;
31 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
33 ikev2_child_sa_t * child);
35 #define ikev2_set_state(sa, v) do { \
37 clib_warning("sa state changed to " #v); \
47 format_ikev2_trace (u8 * s, va_list * args)
49 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
50 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
51 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
53 s = format (s, "ikev2: sw_if_index %d, next index %d",
54 t->sw_if_index, t->next_index);
58 static vlib_node_registration_t ikev2_node;
60 #define foreach_ikev2_error \
61 _(PROCESSED, "IKEv2 packets processed") \
62 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
63 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
64 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
65 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
66 _(NOT_IKEV2, "Non IKEv2 packets received")
70 #define _(sym,str) IKEV2_ERROR_##sym,
76 static char *ikev2_error_strings[] = {
77 #define _(sym,string) string,
84 IKEV2_NEXT_IP4_LOOKUP,
85 IKEV2_NEXT_ERROR_DROP,
89 static ikev2_sa_transform_t *
90 ikev2_find_transform_data (ikev2_sa_transform_t * t)
92 ikev2_main_t *km = &ikev2_main;
93 ikev2_sa_transform_t *td;
95 vec_foreach (td, km->supported_transforms)
97 if (td->type != t->type)
100 if (td->transform_id != t->transform_id)
103 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
105 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
106 || t->attrs[1] != 14)
109 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
117 static ikev2_sa_proposal_t *
118 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
119 ikev2_protocol_id_t prot_id)
121 ikev2_sa_proposal_t *rv = 0;
122 ikev2_sa_proposal_t *proposal;
123 ikev2_sa_transform_t *transform, *new_t;
124 u8 mandatory_bitmap, optional_bitmap;
126 if (prot_id == IKEV2_PROTOCOL_IKE)
128 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
129 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
130 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
131 optional_bitmap = mandatory_bitmap;
133 else if (prot_id == IKEV2_PROTOCOL_ESP)
135 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
136 (1 << IKEV2_TRANSFORM_TYPE_ESN);
137 optional_bitmap = mandatory_bitmap |
138 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
140 else if (prot_id == IKEV2_PROTOCOL_AH)
142 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
143 (1 << IKEV2_TRANSFORM_TYPE_ESN);
144 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
149 vec_add2 (rv, proposal, 1);
151 vec_foreach (proposal, proposals)
154 if (proposal->protocol_id != prot_id)
157 vec_foreach (transform, proposal->transforms)
159 if ((1 << transform->type) & bitmap)
162 if (ikev2_find_transform_data (transform))
164 bitmap |= 1 << transform->type;
165 vec_add2 (rv->transforms, new_t, 1);
166 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
167 new_t->attrs = vec_dup (transform->attrs);
171 clib_warning ("bitmap is %x mandatory is %x optional is %x",
172 bitmap, mandatory_bitmap, optional_bitmap);
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 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
347 vec_len (sa->i_dh_data));
348 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
352 if (sa->is_initiator)
355 RAND_bytes ((u8 *) & sa->ispi, 8);
358 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
359 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
364 RAND_bytes ((u8 *) & sa->rspi, 8);
367 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
368 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
371 /* generate dh keys */
372 ikev2_generate_dh (sa, t);
377 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
379 ikev2_sa_transform_t *t = 0, *t2;
380 ikev2_main_t *km = &ikev2_main;
383 /*move some data to the new SA */
384 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
385 sa->i_nonce = _(sai->i_nonce);
386 sa->i_dh_data = _(sai->i_dh_data);
387 sa->dh_private_key = _(sai->dh_private_key);
388 sa->iaddr.as_u32 = sai->iaddr.as_u32;
389 sa->raddr.as_u32 = sai->raddr.as_u32;
390 sa->is_initiator = sai->is_initiator;
391 sa->i_id.type = sai->i_id.type;
392 sa->profile_index = sai->profile_index;
393 sa->is_profile_index_set = sai->is_profile_index_set;
394 sa->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 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
422 vec_len (sa->i_dh_data));
423 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
428 /* generate dh keys */
429 ikev2_complete_dh (sa, t);
434 ikev2_calc_keys (ikev2_sa_t * sa)
437 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
440 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
442 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
444 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
446 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
448 vec_append (s, sa->i_nonce);
449 vec_append (s, sa->r_nonce);
450 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
452 /* Calculate S = Ni | Nr | SPIi | SPIr */
454 vec_add2 (s, tmp, 2 * sizeof (*spi));
456 spi[0] = clib_host_to_net_u64 (sa->ispi);
457 spi[1] = clib_host_to_net_u64 (sa->rspi);
459 /* calculate PRFplus */
461 int len = tr_prf->key_trunc + /* SK_d */
462 tr_integ->key_len * 2 + /* SK_ai, SK_ar */
463 tr_encr->key_len * 2 + /* SK_ei, SK_er */
464 tr_prf->key_len * 2; /* SK_pi, SK_pr */
466 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
473 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
474 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
475 pos += tr_prf->key_trunc;
478 sa->sk_ai = vec_new (u8, tr_integ->key_len);
479 clib_memcpy_fast (sa->sk_ai, keymat + pos, tr_integ->key_len);
480 pos += tr_integ->key_len;
483 sa->sk_ar = vec_new (u8, tr_integ->key_len);
484 clib_memcpy_fast (sa->sk_ar, keymat + pos, tr_integ->key_len);
485 pos += tr_integ->key_len;
488 sa->sk_ei = vec_new (u8, tr_encr->key_len);
489 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
490 pos += tr_encr->key_len;
493 sa->sk_er = vec_new (u8, tr_encr->key_len);
494 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
495 pos += tr_encr->key_len;
498 sa->sk_pi = vec_new (u8, tr_prf->key_len);
499 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
500 pos += tr_prf->key_len;
503 sa->sk_pr = vec_new (u8, tr_prf->key_len);
504 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
505 pos += tr_prf->key_len;
511 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
514 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
516 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
518 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
520 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
522 vec_append (s, sa->i_nonce);
523 vec_append (s, sa->r_nonce);
524 /* calculate PRFplus */
526 int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
528 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
533 child->sk_ei = vec_new (u8, ctr_encr->key_len);
534 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
535 pos += ctr_encr->key_len;
538 child->sk_ai = vec_new (u8, ctr_integ->key_len);
539 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
540 pos += ctr_integ->key_len;
543 child->sk_er = vec_new (u8, ctr_encr->key_len);
544 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
545 pos += ctr_encr->key_len;
548 child->sk_ar = vec_new (u8, ctr_integ->key_len);
549 clib_memcpy_fast (child->sk_ar, keymat + pos, ctr_integ->key_len);
550 pos += ctr_integ->key_len;
558 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
562 u32 len = clib_net_to_host_u32 (ike->length);
563 u8 payload = ike->nextpayload;
565 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
566 "exchange %x flags %x msgid %x length %u",
567 clib_net_to_host_u64 (ike->ispi),
568 clib_net_to_host_u64 (ike->rspi),
569 payload, ike->version,
570 ike->exchange, ike->flags,
571 clib_net_to_host_u32 (ike->msgid), len);
573 sa->ispi = clib_net_to_host_u64 (ike->ispi);
575 /* store whole IKE payload - needed for PSK auth */
576 vec_free (sa->last_sa_init_req_packet_data);
577 vec_add (sa->last_sa_init_req_packet_data, ike, len);
579 while (p < len && payload != IKEV2_PAYLOAD_NONE)
581 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
582 u32 plen = clib_net_to_host_u16 (ikep->length);
584 if (plen < sizeof (ike_payload_header_t))
587 if (payload == IKEV2_PAYLOAD_SA)
589 ikev2_sa_free_proposal_vector (&sa->i_proposals);
590 sa->i_proposals = ikev2_parse_sa_payload (ikep);
592 else if (payload == IKEV2_PAYLOAD_KE)
594 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
595 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
596 vec_free (sa->i_dh_data);
597 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
599 else if (payload == IKEV2_PAYLOAD_NONCE)
601 vec_free (sa->i_nonce);
602 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
604 else if (payload == IKEV2_PAYLOAD_NOTIFY)
606 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
609 else if (payload == IKEV2_PAYLOAD_VENDOR)
611 ikev2_parse_vendor_payload (ikep);
615 clib_warning ("unknown payload %u flags %x length %u", payload,
617 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
619 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
620 sa->unsupported_cp = payload;
625 payload = ikep->nextpayload;
629 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
633 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
637 u32 len = clib_net_to_host_u32 (ike->length);
638 u8 payload = ike->nextpayload;
640 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
641 "exchange %x flags %x msgid %x length %u",
642 clib_net_to_host_u64 (ike->ispi),
643 clib_net_to_host_u64 (ike->rspi),
644 payload, ike->version,
645 ike->exchange, ike->flags,
646 clib_net_to_host_u32 (ike->msgid), len);
648 sa->ispi = clib_net_to_host_u64 (ike->ispi);
649 sa->rspi = clib_net_to_host_u64 (ike->rspi);
651 /* store whole IKE payload - needed for PSK auth */
652 vec_free (sa->last_sa_init_res_packet_data);
653 vec_add (sa->last_sa_init_res_packet_data, ike, len);
655 while (p < len && payload != IKEV2_PAYLOAD_NONE)
657 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
658 u32 plen = clib_net_to_host_u16 (ikep->length);
660 if (plen < sizeof (ike_payload_header_t))
663 if (payload == IKEV2_PAYLOAD_SA)
665 ikev2_sa_free_proposal_vector (&sa->r_proposals);
666 sa->r_proposals = ikev2_parse_sa_payload (ikep);
669 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
671 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
674 else if (payload == IKEV2_PAYLOAD_KE)
676 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
677 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
678 vec_free (sa->r_dh_data);
679 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
681 else if (payload == IKEV2_PAYLOAD_NONCE)
683 vec_free (sa->r_nonce);
684 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
686 else if (payload == IKEV2_PAYLOAD_NOTIFY)
688 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
691 else if (payload == IKEV2_PAYLOAD_VENDOR)
693 ikev2_parse_vendor_payload (ikep);
697 clib_warning ("unknown payload %u flags %x length %u", payload,
699 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
701 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
702 sa->unsupported_cp = payload;
707 payload = ikep->nextpayload;
713 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
718 u32 len = clib_net_to_host_u32 (ike->length);
719 ike_payload_header_t *ikep = 0;
721 ikev2_sa_transform_t *tr_integ;
723 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
726 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
728 ikep = (ike_payload_header_t *) & ike->payload[p];
729 plen = clib_net_to_host_u16 (ikep->length);
731 if (plen < sizeof (*ikep))
734 if (*payload == IKEV2_PAYLOAD_SK)
736 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
737 last_payload = *payload;
741 clib_warning ("unknown payload %u flags %x length %u", payload,
743 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
745 sa->unsupported_cp = *payload;
750 *payload = ikep->nextpayload;
754 if (last_payload != IKEV2_PAYLOAD_SK)
756 clib_warning ("Last payload must be SK");
761 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
762 (u8 *) ike, len - tr_integ->key_trunc);
764 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
766 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
768 clib_warning ("message integrity check failed");
774 return ikev2_decrypt_data (sa, ikep->payload, plen);
778 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
780 ikev2_main_t *km = &ikev2_main;
784 u32 thread_index = vlib_get_thread_index ();
786 if (!sa->initial_contact)
789 /* find old IKE SAs with the same authenticated identity */
791 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
792 if (tmp->i_id.type != sa->i_id.type ||
793 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
794 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
797 if (sa->rspi != tmp->rspi)
798 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
802 for (i = 0; i < vec_len (delete); i++)
805 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
807 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
809 ikev2_delete_sa (tmp);
813 sa->initial_contact = 0;
817 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
819 ikev2_child_sa_t *first_child_sa;
821 u32 len = clib_net_to_host_u32 (ike->length);
822 u8 payload = ike->nextpayload;
825 ike_payload_header_t *ikep;
828 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
829 "exchange %x flags %x msgid %x length %u",
830 clib_net_to_host_u64 (ike->ispi),
831 clib_net_to_host_u64 (ike->rspi),
832 payload, ike->version,
833 ike->exchange, ike->flags,
834 clib_net_to_host_u32 (ike->msgid), len);
836 ikev2_calc_keys (sa);
838 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
842 if (sa->unsupported_cp)
843 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
844 goto cleanup_and_exit;
847 /* select or create 1st child SA */
848 if (sa->is_initiator)
850 first_child_sa = &sa->childs[0];
854 ikev2_sa_free_all_child_sa (&sa->childs);
855 vec_add2 (sa->childs, first_child_sa, 1);
859 /* process encrypted payload */
861 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
863 ikep = (ike_payload_header_t *) & plaintext[p];
864 plen = clib_net_to_host_u16 (ikep->length);
866 if (plen < sizeof (ike_payload_header_t))
867 goto cleanup_and_exit;
869 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
871 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
872 if (sa->is_initiator)
874 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
875 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
879 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
880 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
883 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
885 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
887 sa->i_id.type = id->id_type;
888 vec_free (sa->i_id.data);
889 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
891 clib_warning ("received payload IDi, len %u id_type %u",
892 plen - sizeof (*id), id->id_type);
894 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
896 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
898 sa->r_id.type = id->id_type;
899 vec_free (sa->r_id.data);
900 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
902 clib_warning ("received payload IDr len %u id_type %u",
903 plen - sizeof (*id), id->id_type);
905 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
907 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
909 if (sa->is_initiator)
911 sa->r_auth.method = a->auth_method;
912 vec_free (sa->r_auth.data);
913 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
917 sa->i_auth.method = a->auth_method;
918 vec_free (sa->i_auth.data);
919 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
922 clib_warning ("received payload AUTH, len %u auth_type %u",
923 plen - sizeof (*a), a->auth_method);
925 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
927 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
928 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
930 sa->initial_contact = 1;
934 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
936 ikev2_parse_vendor_payload (ikep);
938 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
940 clib_warning ("received payload TSi, len %u",
941 plen - sizeof (*ikep));
943 vec_free (first_child_sa->tsi);
944 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
946 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
948 clib_warning ("received payload TSr, len %u",
949 plen - sizeof (*ikep));
951 vec_free (first_child_sa->tsr);
952 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
956 clib_warning ("unknown payload %u flags %x length %u data %u",
957 payload, ikep->flags, plen - 4,
958 format_hex_bytes, ikep->payload, plen - 4);
960 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
962 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
963 sa->unsupported_cp = payload;
968 payload = ikep->nextpayload;
973 vec_free (plaintext);
977 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
981 u32 len = clib_net_to_host_u32 (ike->length);
982 u8 payload = ike->nextpayload;
985 ike_payload_header_t *ikep;
988 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
989 "exchange %x flags %x msgid %x length %u",
990 clib_net_to_host_u64 (ike->ispi),
991 clib_net_to_host_u64 (ike->rspi),
992 payload, ike->version,
993 ike->exchange, ike->flags,
994 clib_net_to_host_u32 (ike->msgid), len);
996 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
999 goto cleanup_and_exit;
1001 /* process encrypted payload */
1003 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1005 ikep = (ike_payload_header_t *) & plaintext[p];
1006 plen = clib_net_to_host_u16 (ikep->length);
1008 if (plen < sizeof (ike_payload_header_t))
1009 goto cleanup_and_exit;
1011 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1013 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1014 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1015 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1018 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1020 sa->del = ikev2_parse_delete_payload (ikep);
1022 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1024 ikev2_parse_vendor_payload (ikep);
1028 clib_warning ("unknown payload %u flags %x length %u data %u",
1029 payload, ikep->flags, plen - 4,
1030 format_hex_bytes, ikep->payload, plen - 4);
1032 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1034 sa->unsupported_cp = payload;
1039 payload = ikep->nextpayload;
1044 vec_free (plaintext);
1048 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1052 u32 len = clib_net_to_host_u32 (ike->length);
1053 u8 payload = ike->nextpayload;
1056 u8 nonce[IKEV2_NONCE_SIZE];
1058 ike_payload_header_t *ikep;
1060 ikev2_notify_t *n = 0;
1061 ikev2_ts_t *tsi = 0;
1062 ikev2_ts_t *tsr = 0;
1063 ikev2_sa_proposal_t *proposal = 0;
1064 ikev2_child_sa_t *child_sa;
1066 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1067 "exchange %x flags %x msgid %x length %u",
1068 clib_net_to_host_u64 (ike->ispi),
1069 clib_net_to_host_u64 (ike->rspi),
1070 payload, ike->version,
1071 ike->exchange, ike->flags,
1072 clib_net_to_host_u32 (ike->msgid), len);
1074 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1077 goto cleanup_and_exit;
1079 /* process encrypted payload */
1081 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1083 ikep = (ike_payload_header_t *) & plaintext[p];
1084 plen = clib_net_to_host_u16 (ikep->length);
1086 if (plen < sizeof (ike_payload_header_t))
1087 goto cleanup_and_exit;
1089 else if (payload == IKEV2_PAYLOAD_SA)
1091 proposal = ikev2_parse_sa_payload (ikep);
1093 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1095 n = ikev2_parse_notify_payload (ikep);
1096 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1101 else if (payload == IKEV2_PAYLOAD_DELETE)
1103 sa->del = ikev2_parse_delete_payload (ikep);
1105 else if (payload == IKEV2_PAYLOAD_VENDOR)
1107 ikev2_parse_vendor_payload (ikep);
1109 else if (payload == IKEV2_PAYLOAD_NONCE)
1111 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1113 else if (payload == IKEV2_PAYLOAD_TSI)
1115 tsi = ikev2_parse_ts_payload (ikep);
1117 else if (payload == IKEV2_PAYLOAD_TSR)
1119 tsr = ikev2_parse_ts_payload (ikep);
1123 clib_warning ("unknown payload %u flags %x length %u data %u",
1124 payload, ikep->flags, plen - 4,
1125 format_hex_bytes, ikep->payload, plen - 4);
1127 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1129 sa->unsupported_cp = payload;
1134 payload = ikep->nextpayload;
1138 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1140 ikev2_rekey_t *rekey = &sa->rekey[0];
1141 rekey->protocol_id = proposal->protocol_id;
1143 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1144 rekey->i_proposal->spi = rekey->spi;
1145 rekey->r_proposal = proposal;
1149 vec_free (sa->r_nonce);
1150 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1151 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1154 child_sa->rekey_retries = 0;
1159 ikev2_rekey_t *rekey;
1160 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1163 clib_warning ("child SA spi %lx not found", n->spi);
1164 goto cleanup_and_exit;
1166 vec_add2 (sa->rekey, rekey, 1);
1167 rekey->protocol_id = n->protocol_id;
1168 rekey->spi = n->spi;
1169 rekey->i_proposal = proposal;
1171 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1175 vec_free (sa->i_nonce);
1176 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1177 /* generate new Nr */
1178 vec_free (sa->r_nonce);
1179 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1180 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1184 vec_free (plaintext);
1189 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1197 ikev2_sa_transform_t *tr_prf;
1200 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1206 nonce = sa->i_nonce;
1207 packet_data = sa->last_sa_init_res_packet_data;
1213 nonce = sa->r_nonce;
1214 packet_data = sa->last_sa_init_req_packet_data;
1217 data = vec_new (u8, 4);
1219 vec_append (data, id->data);
1221 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1222 vec_append (authmsg, packet_data);
1223 vec_append (authmsg, nonce);
1224 vec_append (authmsg, id_hash);
1232 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1234 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1235 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1236 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1237 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1244 ikev2_sa_match_ts (ikev2_sa_t * sa)
1246 ikev2_main_t *km = &ikev2_main;
1248 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1252 pool_foreach (p, km->profiles, ({
1254 if (sa->is_initiator)
1268 if (p->rem_id.type != id->type ||
1269 vec_len(p->rem_id.data) != vec_len(id->data) ||
1270 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1273 vec_foreach(ts, sa->childs[0].tsi)
1275 if (ikev2_ts_cmp(p_tsi, ts))
1277 vec_add1 (tsi, ts[0]);
1282 vec_foreach(ts, sa->childs[0].tsr)
1284 if (ikev2_ts_cmp(p_tsr, ts))
1286 vec_add1 (tsr, ts[0]);
1297 vec_free (sa->childs[0].tsi);
1298 vec_free (sa->childs[0].tsr);
1299 sa->childs[0].tsi = tsi;
1300 sa->childs[0].tsr = tsr;
1306 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1311 ikev2_sa_auth (ikev2_sa_t * sa)
1313 ikev2_main_t *km = &ikev2_main;
1314 ikev2_profile_t *p, *sel_p = 0;
1315 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1316 ikev2_sa_transform_t *tr_prf;
1319 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1321 /* only shared key and rsa signature */
1322 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1323 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1325 clib_warning ("unsupported authentication method %u",
1327 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1331 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1332 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1335 ikev2_auth_t *sa_auth;
1337 if (sa->is_initiator)
1340 sa_auth = &sa->r_auth;
1345 sa_auth = &sa->i_auth;
1349 pool_foreach (p, km->profiles, ({
1352 if (p->rem_id.type != sa_id->type ||
1353 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1354 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1357 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1359 if (!p->auth.data ||
1360 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1363 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1364 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1366 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1368 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1375 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1377 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1380 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1382 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1395 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1397 if (!sa->is_initiator)
1399 vec_free (sa->r_id.data);
1400 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1401 sa->r_id.type = sel_p->loc_id.type;
1403 /* generate our auth data */
1404 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1405 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1407 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1408 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1410 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1412 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1413 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1417 /* select transforms for 1st child sa */
1418 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1419 sa->childs[0].r_proposals =
1420 ikev2_select_proposal (sa->childs[0].i_proposals,
1421 IKEV2_PROTOCOL_ESP);
1426 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1434 ikev2_sa_auth_init (ikev2_sa_t * sa)
1436 ikev2_main_t *km = &ikev2_main;
1437 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1438 ikev2_sa_transform_t *tr_prf;
1441 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1443 /* only shared key and rsa signature */
1444 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1445 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1447 clib_warning ("unsupported authentication method %u",
1449 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1453 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1454 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1455 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1456 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1459 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1461 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1462 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1464 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1466 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1467 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1478 ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1479 ikev2_child_sa_t * child)
1481 ikev2_main_t *km = &ikev2_main;
1482 ikev2_profile_t *p = 0;
1483 ipsec_add_del_tunnel_args_t a;
1484 ikev2_sa_transform_t *tr;
1485 ikev2_sa_proposal_t *proposals;
1489 if (!child->r_proposals)
1491 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1495 clib_memset (&a, 0, sizeof (a));
1497 if (sa->is_initiator)
1499 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1500 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1501 proposals = child->r_proposals;
1502 a.local_spi = child->r_proposals[0].spi;
1503 a.remote_spi = child->i_proposals[0].spi;
1507 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1508 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1509 proposals = child->i_proposals;
1510 a.local_spi = child->i_proposals[0].spi;
1511 a.remote_spi = child->r_proposals[0].spi;
1515 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1517 a.esn = tr->esn_type;
1521 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1524 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1526 switch (tr->key_len)
1529 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1532 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1535 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1538 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1543 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM
1546 switch (tr->key_len)
1549 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1552 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1555 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1558 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1565 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1571 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1575 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1578 switch (tr->integ_type)
1580 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1581 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1583 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1584 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1586 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1587 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1589 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1590 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1593 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1599 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1603 ikev2_calc_child_keys (sa, child);
1605 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1606 if (sa->is_initiator)
1608 loc_ikey = child->sk_ai;
1609 rem_ikey = child->sk_ar;
1610 loc_ckey = child->sk_ei;
1611 rem_ckey = child->sk_er;
1615 loc_ikey = child->sk_ar;
1616 rem_ikey = child->sk_ai;
1617 loc_ckey = child->sk_er;
1618 rem_ckey = child->sk_ei;
1621 a.integ_alg = integ_type;
1622 a.local_integ_key_len = vec_len (loc_ikey);
1623 clib_memcpy_fast (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1624 a.remote_integ_key_len = vec_len (rem_ikey);
1625 clib_memcpy_fast (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1627 a.crypto_alg = encr_type;
1628 a.local_crypto_key_len = vec_len (loc_ckey);
1629 clib_memcpy_fast (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1630 a.remote_crypto_key_len = vec_len (rem_ckey);
1631 clib_memcpy_fast (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1633 if (sa->is_profile_index_set)
1634 p = pool_elt_at_index (km->profiles, sa->profile_index);
1636 if (p && p->lifetime)
1638 child->time_to_expiration =
1639 vlib_time_now (vnm->vlib_main) + p->lifetime;
1640 if (p->lifetime_jitter)
1642 // This is not much better than rand(3), which Coverity warns
1643 // is unsuitable for security applications; random_u32 is
1644 // however fast. If this perturbance to the expiration time
1645 // needs to use a better RNG then we may need to use something
1646 // like /dev/urandom which has significant overhead.
1647 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1648 rnd = random_u32 (&rnd);
1650 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1654 ipsec_add_del_tunnel_if (&a);
1660 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1661 ikev2_child_sa_t * child)
1663 ipsec_add_del_tunnel_args_t a;
1665 if (sa->is_initiator)
1667 if (!vec_len (child->i_proposals))
1671 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1672 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1673 a.local_spi = child->r_proposals[0].spi;
1674 a.remote_spi = child->i_proposals[0].spi;
1678 if (!vec_len (child->r_proposals))
1682 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1683 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1684 a.local_spi = child->i_proposals[0].spi;
1685 a.remote_spi = child->r_proposals[0].spi;
1688 ipsec_add_del_tunnel_if (&a);
1693 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1696 ike_payload_header_t *ph;
1700 ikev2_sa_transform_t *tr_encr, *tr_integ;
1702 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1704 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1706 ikev2_payload_chain_t *chain = 0;
1707 ikev2_payload_new_chain (chain);
1709 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1711 if (sa->r_proposals == 0)
1713 ikev2_payload_add_notify (chain,
1714 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1715 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1717 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1719 u8 *data = vec_new (u8, 2);
1720 ikev2_sa_transform_t *tr_dh;
1722 ikev2_sa_get_td_for_type (sa->r_proposals,
1723 IKEV2_TRANSFORM_TYPE_DH);
1724 ASSERT (tr_dh && tr_dh->dh_type);
1726 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1727 data[1] = (tr_dh->dh_type) & 0xff;
1729 ikev2_payload_add_notify (chain,
1730 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1733 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1735 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1737 u8 *data = vec_new (u8, 1);
1739 data[0] = sa->unsupported_cp;
1740 ikev2_payload_add_notify (chain,
1741 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1747 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1748 ikev2_payload_add_sa (chain, sa->r_proposals);
1749 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1750 ikev2_payload_add_nonce (chain, sa->r_nonce);
1753 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1755 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1757 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1758 ikev2_payload_add_auth (chain, &sa->r_auth);
1759 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1760 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1761 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1763 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1765 ikev2_payload_add_notify (chain,
1766 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1768 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1770 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1772 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1774 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1775 ikev2_payload_add_auth (chain, &sa->r_auth);
1777 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1779 ikev2_payload_add_notify (chain,
1780 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1781 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1782 ikev2_payload_add_auth (chain, &sa->r_auth);
1783 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1784 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
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,
1796 else if (sa->state == IKEV2_STATE_SA_INIT)
1798 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1799 ikev2_payload_add_auth (chain, &sa->i_auth);
1800 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1801 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1802 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1806 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1810 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1812 /* if pending delete */
1815 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1817 if (sa->is_initiator)
1818 ikev2_payload_add_delete (chain, sa->del);
1820 /* The response to a request that deletes the IKE SA is an empty
1821 INFORMATIONAL response. */
1822 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1824 /* The response to a request that deletes ESP or AH SAs will contain
1825 delete payloads for the paired SAs going in the other direction. */
1828 ikev2_payload_add_delete (chain, sa->del);
1833 /* received N(AUTHENTICATION_FAILED) */
1834 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1836 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1839 /* received unsupported critical payload */
1840 else if (sa->unsupported_cp)
1842 u8 *data = vec_new (u8, 1);
1844 data[0] = sa->unsupported_cp;
1845 ikev2_payload_add_notify (chain,
1846 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1849 sa->unsupported_cp = 0;
1851 /* else send empty response */
1853 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1855 if (sa->is_initiator)
1858 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1859 ikev2_notify_t notify;
1860 u8 *data = vec_new (u8, 4);
1861 clib_memset (¬ify, 0, sizeof (notify));
1862 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1863 notify.spi = sa->childs[0].i_proposals->spi;
1864 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1866 ikev2_payload_add_sa (chain, proposals);
1867 ikev2_payload_add_nonce (chain, sa->i_nonce);
1868 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1869 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1870 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1879 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1880 ikev2_payload_add_nonce (chain, sa->r_nonce);
1881 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1883 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1885 vec_del1 (sa->rekey, 0);
1887 else if (sa->unsupported_cp)
1889 u8 *data = vec_new (u8, 1);
1891 data[0] = sa->unsupported_cp;
1892 ikev2_payload_add_notify (chain,
1893 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1896 sa->unsupported_cp = 0;
1900 ikev2_payload_add_notify (chain,
1901 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1908 ike->version = IKE_VERSION_2;
1909 ike->nextpayload = IKEV2_PAYLOAD_SK;
1910 tlen = sizeof (*ike);
1911 if (sa->is_initiator)
1913 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1914 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1918 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1922 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1924 tlen += vec_len (chain->data);
1925 ike->nextpayload = chain->first_payload_type;
1926 ike->length = clib_host_to_net_u32 (tlen);
1927 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
1929 /* store whole IKE payload - needed for PSK auth */
1930 vec_free (sa->last_sa_init_res_packet_data);
1931 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1936 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1939 plen = sizeof (*ph);
1940 ph = (ike_payload_header_t *) & ike->payload[0];
1941 ph->nextpayload = chain->first_payload_type;
1943 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1946 /* add space for hmac */
1947 plen += tr_integ->key_trunc;
1950 /* payload and total length */
1951 ph->length = clib_host_to_net_u16 (plen);
1952 ike->length = clib_host_to_net_u32 (tlen);
1954 /* calc integrity data for whole packet except hash itself */
1956 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1957 (u8 *) ike, tlen - tr_integ->key_trunc);
1959 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
1960 sizeof (*ike), integ, tr_integ->key_trunc);
1962 /* store whole IKE payload - needed for retransmit */
1963 vec_free (sa->last_res_packet_data);
1964 vec_add (sa->last_res_packet_data, ike, tlen);
1968 ikev2_payload_destroy_chain (chain);
1974 ikev2_retransmit_sa_init (ike_header_t * ike,
1975 ip4_address_t iaddr, ip4_address_t raddr)
1977 ikev2_main_t *km = &ikev2_main;
1979 u32 thread_index = vlib_get_thread_index ();
1982 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1983 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1984 sa->iaddr.as_u32 == iaddr.as_u32 &&
1985 sa->raddr.as_u32 == raddr.as_u32)
1988 u32 len = clib_net_to_host_u32(ike->length);
1989 u8 payload = ike->nextpayload;
1991 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1992 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1993 u32 plen = clib_net_to_host_u16(ikep->length);
1995 if (plen < sizeof(ike_payload_header_t))
1998 if (payload == IKEV2_PAYLOAD_NONCE)
2000 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2002 /* req is retransmit */
2003 if (sa->state == IKEV2_STATE_SA_INIT)
2006 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2007 ike->ispi = tmp->ispi;
2008 ike->rspi = tmp->rspi;
2009 ike->nextpayload = tmp->nextpayload;
2010 ike->version = tmp->version;
2011 ike->exchange = tmp->exchange;
2012 ike->flags = tmp->flags;
2013 ike->msgid = tmp->msgid;
2014 ike->length = tmp->length;
2015 clib_memcpy_fast(ike->payload, tmp->payload,
2016 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2017 clib_warning("IKE_SA_INIT retransmit from %U to %U",
2018 format_ip4_address, &raddr,
2019 format_ip4_address, &iaddr);
2022 /* else ignore req */
2025 clib_warning("IKE_SA_INIT ignore from %U to %U",
2026 format_ip4_address, &raddr,
2027 format_ip4_address, &iaddr);
2032 payload = ikep->nextpayload;
2039 /* req is not retransmit */
2044 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2046 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2049 if (msg_id > sa->last_msg_id)
2051 sa->last_msg_id = msg_id;
2054 /* retransmitted req */
2055 else if (msg_id == sa->last_msg_id)
2058 tmp = (ike_header_t *) sa->last_res_packet_data;
2059 ike->ispi = tmp->ispi;
2060 ike->rspi = tmp->rspi;
2061 ike->nextpayload = tmp->nextpayload;
2062 ike->version = tmp->version;
2063 ike->exchange = tmp->exchange;
2064 ike->flags = tmp->flags;
2065 ike->msgid = tmp->msgid;
2066 ike->length = tmp->length;
2067 clib_memcpy_fast (ike->payload, tmp->payload,
2068 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2069 clib_warning ("IKE msgid %u retransmit from %U to %U",
2071 format_ip4_address, &sa->raddr,
2072 format_ip4_address, &sa->iaddr);
2075 /* old req ignore */
2078 clib_warning ("IKE msgid %u req ignore from %U to %U",
2080 format_ip4_address, &sa->raddr,
2081 format_ip4_address, &sa->iaddr);
2088 ikev2_node_fn (vlib_main_t * vm,
2089 vlib_node_runtime_t * node, vlib_frame_t * frame)
2091 u32 n_left_from, *from, *to_next;
2092 ikev2_next_t next_index;
2093 ikev2_main_t *km = &ikev2_main;
2094 u32 thread_index = vlib_get_thread_index ();
2096 from = vlib_frame_vector_args (frame);
2097 n_left_from = frame->n_vectors;
2098 next_index = node->cached_next_index;
2100 while (n_left_from > 0)
2104 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2106 while (n_left_from > 0 && n_left_to_next > 0)
2110 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2115 ikev2_sa_t *sa0 = 0;
2116 ikev2_sa_t sa; /* temporary store for SA */
2120 /* speculatively enqueue b0 to the current next frame */
2126 n_left_to_next -= 1;
2128 b0 = vlib_get_buffer (vm, bi0);
2129 ike0 = vlib_buffer_get_current (b0);
2130 vlib_buffer_advance (b0, -sizeof (*udp0));
2131 udp0 = vlib_buffer_get_current (b0);
2132 vlib_buffer_advance (b0, -sizeof (*ip40));
2133 ip40 = vlib_buffer_get_current (b0);
2135 if (ike0->version != IKE_VERSION_2)
2137 vlib_node_increment_counter (vm, ikev2_node.index,
2138 IKEV2_ERROR_NOT_IKEV2, 1);
2142 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2145 clib_memset (sa0, 0, sizeof (*sa0));
2147 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2149 if (ike0->rspi == 0)
2151 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2152 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2154 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2158 vlib_node_increment_counter (vm, ikev2_node.index,
2159 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2161 len = clib_net_to_host_u32 (ike0->length);
2166 vlib_node_increment_counter (vm, ikev2_node.index,
2167 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2172 ikev2_process_sa_init_req (vm, sa0, ike0);
2174 if (sa0->state == IKEV2_STATE_SA_INIT)
2176 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2178 ikev2_select_proposal (sa0->i_proposals,
2179 IKEV2_PROTOCOL_IKE);
2180 ikev2_generate_sa_init_data (sa0);
2183 if (sa0->state == IKEV2_STATE_SA_INIT
2184 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2186 len = ikev2_generate_message (sa0, ike0, 0);
2189 if (sa0->state == IKEV2_STATE_SA_INIT)
2191 /* add SA to the pool */
2192 pool_get (km->per_thread_data[thread_index].sas,
2194 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2196 per_thread_data[thread_index].sa_by_rspi,
2199 km->per_thread_data[thread_index].sas);
2203 ikev2_sa_free_all_vec (sa0);
2207 else //received sa_init without initiator flag
2209 ikev2_process_sa_init_resp (vm, sa0, ike0);
2211 if (sa0->state == IKEV2_STATE_SA_INIT)
2213 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2214 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2218 pool_elt_at_index (km->sais, p[0]);
2220 ikev2_complete_sa_data (sa0, sai);
2221 ikev2_calc_keys (sa0);
2222 ikev2_sa_auth_init (sa0);
2223 len = ikev2_generate_message (sa0, ike0, 0);
2227 if (sa0->state == IKEV2_STATE_SA_INIT)
2229 /* add SA to the pool */
2230 pool_get (km->per_thread_data[thread_index].sas, sa0);
2231 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2232 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2234 sa0 - km->per_thread_data[thread_index].sas);
2238 ikev2_sa_free_all_vec (sa0);
2242 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2245 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2246 clib_net_to_host_u64 (ike0->rspi));
2250 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2253 r = ikev2_retransmit_resp (sa0, ike0);
2256 vlib_node_increment_counter (vm, ikev2_node.index,
2257 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2259 len = clib_net_to_host_u32 (ike0->length);
2264 vlib_node_increment_counter (vm, ikev2_node.index,
2265 IKEV2_ERROR_IKE_REQ_IGNORE,
2270 ikev2_process_auth_req (vm, sa0, ike0);
2271 ikev2_sa_auth (sa0);
2272 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2274 ikev2_initial_contact_cleanup (sa0);
2275 ikev2_sa_match_ts (sa0);
2276 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2277 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2281 if (sa0->is_initiator)
2283 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2287 pool_elt_at_index (km->sais, p[0]);
2288 hash_unset (km->sa_by_ispi, sai->ispi);
2289 ikev2_sa_free_all_vec (sai);
2290 pool_put (km->sais, sai);
2295 len = ikev2_generate_message (sa0, ike0, 0);
2299 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2302 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2303 clib_net_to_host_u64 (ike0->rspi));
2307 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2310 r = ikev2_retransmit_resp (sa0, ike0);
2313 vlib_node_increment_counter (vm, ikev2_node.index,
2314 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2316 len = clib_net_to_host_u32 (ike0->length);
2321 vlib_node_increment_counter (vm, ikev2_node.index,
2322 IKEV2_ERROR_IKE_REQ_IGNORE,
2327 ikev2_process_informational_req (vm, sa0, ike0);
2330 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2332 ikev2_delete_t *d, *tmp, *resp = 0;
2333 vec_foreach (d, sa0->del)
2335 ikev2_child_sa_t *ch_sa;
2336 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2338 !sa0->is_initiator);
2341 ikev2_delete_tunnel_interface (km->vnet_main,
2343 if (!sa0->is_initiator)
2345 vec_add2 (resp, tmp, 1);
2346 tmp->protocol_id = d->protocol_id;
2347 tmp->spi = ch_sa->r_proposals[0].spi;
2349 ikev2_sa_del_child_sa (sa0, ch_sa);
2352 if (!sa0->is_initiator)
2354 vec_free (sa0->del);
2359 if (!sa0->is_initiator)
2361 len = ikev2_generate_message (sa0, ike0, 0);
2365 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2368 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2369 clib_net_to_host_u64 (ike0->rspi));
2373 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2376 r = ikev2_retransmit_resp (sa0, ike0);
2379 vlib_node_increment_counter (vm, ikev2_node.index,
2380 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2382 len = clib_net_to_host_u32 (ike0->length);
2387 vlib_node_increment_counter (vm, ikev2_node.index,
2388 IKEV2_ERROR_IKE_REQ_IGNORE,
2393 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2396 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2398 ikev2_child_sa_t *child;
2399 vec_add2 (sa0->childs, child, 1);
2400 child->r_proposals = sa0->rekey[0].r_proposal;
2401 child->i_proposals = sa0->rekey[0].i_proposal;
2402 child->tsi = sa0->rekey[0].tsi;
2403 child->tsr = sa0->rekey[0].tsr;
2404 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2407 if (sa0->is_initiator)
2409 vec_del1 (sa0->rekey, 0);
2413 len = ikev2_generate_message (sa0, ike0, 0);
2420 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2422 format_ip4_address, ip40->src_address.as_u8,
2423 format_ip4_address, ip40->dst_address.as_u8);
2427 /* if we are sending packet back, rewrite headers */
2430 next0 = IKEV2_NEXT_IP4_LOOKUP;
2431 if (sa0->is_initiator)
2433 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2434 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2438 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2439 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2442 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2444 b0->current_length =
2445 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2446 ip40->length = clib_host_to_net_u16 (b0->current_length);
2447 ip40->checksum = ip4_header_checksum (ip40);
2450 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2451 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2453 ikev2_child_sa_t *c;
2455 vec_foreach (c, sa0->childs)
2456 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2458 ikev2_delete_sa (sa0);
2460 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2462 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2463 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2465 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2466 t->sw_if_index = sw_if_index0;
2467 t->next_index = next0;
2470 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2471 n_left_to_next, bi0, next0);
2474 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2477 vlib_node_increment_counter (vm, ikev2_node.index,
2478 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2479 return frame->n_vectors;
2483 VLIB_REGISTER_NODE (ikev2_node,static) = {
2484 .function = ikev2_node_fn,
2486 .vector_size = sizeof (u32),
2487 .format_trace = format_ikev2_trace,
2488 .type = VLIB_NODE_TYPE_INTERNAL,
2490 .n_errors = ARRAY_LEN(ikev2_error_strings),
2491 .error_strings = ikev2_error_strings,
2493 .n_next_nodes = IKEV2_N_NEXT,
2496 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2497 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2502 // set ikev2 proposals when vpp is used as initiator
2503 static clib_error_t *
2504 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2505 ikev2_transforms_set * ts,
2506 ikev2_sa_proposal_t ** proposals, int is_ike)
2509 ikev2_main_t *km = &ikev2_main;
2510 ikev2_sa_proposal_t *proposal;
2511 vec_add2 (*proposals, proposal, 1);
2512 ikev2_sa_transform_t *td;
2517 vec_foreach (td, km->supported_transforms)
2519 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2520 && td->encr_type == ts->crypto_alg
2521 && td->key_len == ts->crypto_key_size / 8)
2524 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2525 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2526 vec_add (td->attrs, (u8 *) attr, 4);
2527 vec_add1 (proposal->transforms, *td);
2536 r = clib_error_return (0, "Unsupported algorithm");
2542 vec_foreach (td, km->supported_transforms)
2544 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2545 && td->integ_type == ts->integ_alg)
2547 vec_add1 (proposal->transforms, *td);
2555 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2556 r = clib_error_return (0, "Unsupported algorithm");
2564 vec_foreach (td, km->supported_transforms)
2566 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2567 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2569 vec_add1 (proposal->transforms, *td);
2576 r = clib_error_return (0, "Unsupported algorithm");
2582 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2585 vec_foreach (td, km->supported_transforms)
2587 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2589 vec_add1 (proposal->transforms, *td);
2592 sa->dh_group = td->dh_type;
2600 r = clib_error_return (0, "Unsupported algorithm");
2608 vec_foreach (td, km->supported_transforms)
2610 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2612 vec_add1 (proposal->transforms, *td);
2618 r = clib_error_return (0, "Unsupported algorithm");
2627 static ikev2_profile_t *
2628 ikev2_profile_index_by_name (u8 * name)
2630 ikev2_main_t *km = &ikev2_main;
2633 p = mhash_get (&km->profile_index_by_name, name);
2637 return pool_elt_at_index (km->profiles, p[0]);
2642 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2651 b0 = vlib_get_buffer (vm, bi0);
2652 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2653 udp0 = vlib_buffer_get_current (b0);
2654 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2655 ip40 = vlib_buffer_get_current (b0);
2658 ip40->ip_version_and_header_length = 0x45;
2660 ip40->fragment_id = 0;
2661 ip40->flags_and_fragment_offset = 0;
2663 ip40->protocol = IP_PROTOCOL_UDP;
2664 ip40->dst_address.as_u32 = dst->as_u32;
2665 ip40->src_address.as_u32 = src->as_u32;
2666 udp0->dst_port = clib_host_to_net_u16 (500);
2667 udp0->src_port = clib_host_to_net_u16 (500);
2668 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2670 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2671 ip40->length = clib_host_to_net_u16 (b0->current_length);
2672 ip40->checksum = ip4_header_checksum (ip40);
2675 /* send the request */
2676 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2677 to_next = vlib_frame_vector_args (f);
2680 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2685 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2688 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2693 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2694 *ike = vlib_buffer_get_current (b0);
2699 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2701 ikev2_main_t *km = &ikev2_main;
2703 km->pkey = ikev2_load_key_file (file);
2704 if (km->pkey == NULL)
2705 return clib_error_return (0, "load key '%s' failed", file);
2711 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2713 ikev2_main_t *km = &ikev2_main;
2718 if (ikev2_profile_index_by_name (name))
2719 return clib_error_return (0, "policy %v already exists", name);
2721 pool_get (km->profiles, p);
2722 clib_memset (p, 0, sizeof (*p));
2723 p->name = vec_dup (name);
2724 p->responder.sw_if_index = ~0;
2725 uword index = p - km->profiles;
2726 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2730 p = ikev2_profile_index_by_name (name);
2732 return clib_error_return (0, "policy %v does not exists", name);
2735 pool_put (km->profiles, p);
2736 mhash_unset (&km->profile_index_by_name, name, 0);
2742 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2743 u8 * auth_data, u8 data_hex_format)
2748 p = ikev2_profile_index_by_name (name);
2752 r = clib_error_return (0, "unknown profile %v", name);
2755 vec_free (p->auth.data);
2756 p->auth.method = auth_method;
2757 p->auth.data = vec_dup (auth_data);
2758 p->auth.hex = data_hex_format;
2760 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2762 vec_add1 (p->auth.data, 0);
2764 EVP_PKEY_free (p->auth.key);
2765 p->auth.key = ikev2_load_cert_file (auth_data);
2766 if (p->auth.key == NULL)
2767 return clib_error_return (0, "load cert '%s' failed", auth_data);
2774 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2780 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2781 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2783 r = clib_error_return (0, "unsupported identity type %U",
2784 format_ikev2_id_type, id_type);
2788 p = ikev2_profile_index_by_name (name);
2792 r = clib_error_return (0, "unknown profile %v", name);
2798 vec_free (p->loc_id.data);
2799 p->loc_id.type = id_type;
2800 p->loc_id.data = vec_dup (data);
2804 vec_free (p->rem_id.data);
2805 p->rem_id.type = id_type;
2806 p->rem_id.data = vec_dup (data);
2813 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2814 u16 start_port, u16 end_port, ip4_address_t start_addr,
2815 ip4_address_t end_addr, int is_local)
2820 p = ikev2_profile_index_by_name (name);
2824 r = clib_error_return (0, "unknown profile %v", name);
2830 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2831 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2832 p->loc_ts.start_port = start_port;
2833 p->loc_ts.end_port = end_port;
2834 p->loc_ts.protocol_id = protocol_id;
2835 p->loc_ts.ts_type = 7;
2839 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2840 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2841 p->rem_ts.start_port = start_port;
2842 p->rem_ts.end_port = end_port;
2843 p->rem_ts.protocol_id = protocol_id;
2844 p->rem_ts.ts_type = 7;
2852 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2853 u32 sw_if_index, ip4_address_t ip4)
2858 p = ikev2_profile_index_by_name (name);
2862 r = clib_error_return (0, "unknown profile %v", name);
2866 p->responder.sw_if_index = sw_if_index;
2867 p->responder.ip4 = ip4;
2873 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2874 ikev2_transform_encr_type_t crypto_alg,
2875 ikev2_transform_integ_type_t integ_alg,
2876 ikev2_transform_dh_type_t dh_type,
2877 u32 crypto_key_size)
2882 p = ikev2_profile_index_by_name (name);
2886 r = clib_error_return (0, "unknown profile %v", name);
2890 p->ike_ts.crypto_alg = crypto_alg;
2891 p->ike_ts.integ_alg = integ_alg;
2892 p->ike_ts.dh_type = dh_type;
2893 p->ike_ts.crypto_key_size = crypto_key_size;
2898 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2899 ikev2_transform_encr_type_t crypto_alg,
2900 ikev2_transform_integ_type_t integ_alg,
2901 ikev2_transform_dh_type_t dh_type,
2902 u32 crypto_key_size)
2907 p = ikev2_profile_index_by_name (name);
2911 r = clib_error_return (0, "unknown profile %v", name);
2915 p->esp_ts.crypto_alg = crypto_alg;
2916 p->esp_ts.integ_alg = integ_alg;
2917 p->esp_ts.dh_type = dh_type;
2918 p->esp_ts.crypto_key_size = crypto_key_size;
2923 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2924 u64 lifetime, u32 jitter, u32 handover,
2930 p = ikev2_profile_index_by_name (name);
2934 r = clib_error_return (0, "unknown profile %v", name);
2938 p->lifetime = lifetime;
2939 p->lifetime_jitter = jitter;
2940 p->handover = handover;
2941 p->lifetime_maxdata = maxdata;
2946 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2950 ip4_main_t *im = &ip4_main;
2951 ikev2_main_t *km = &ikev2_main;
2953 p = ikev2_profile_index_by_name (name);
2957 r = clib_error_return (0, "unknown profile %v", name);
2961 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2963 r = clib_error_return (0, "responder not set for profile %v", name);
2968 /* Create the Initiator Request */
2972 ip_lookup_main_t *lm = &im->lookup_main;
2974 int len = sizeof (ike_header_t);
2976 /* Get own iface IP */
2978 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2979 ip_interface_address_t *if_add =
2980 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2981 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2983 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2985 /* Prepare the SA and the IKE payload */
2987 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
2988 ikev2_payload_chain_t *chain = 0;
2989 ikev2_payload_new_chain (chain);
2991 /* Build the IKE proposal payload */
2992 ikev2_sa_proposal_t *proposals = 0;
2993 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2994 proposals[0].proposal_num = 1;
2995 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2997 /* Add and then cleanup proposal data */
2998 ikev2_payload_add_sa (chain, proposals);
2999 ikev2_sa_free_proposal_vector (&proposals);
3001 sa.is_initiator = 1;
3002 sa.profile_index = p - km->profiles;
3003 sa.is_profile_index_set = 1;
3004 sa.state = IKEV2_STATE_SA_INIT;
3005 ikev2_generate_sa_init_data (&sa);
3006 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3007 ikev2_payload_add_nonce (chain, sa.i_nonce);
3009 /* Build the child SA proposal */
3010 vec_resize (sa.childs, 1);
3011 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3012 &sa.childs[0].i_proposals, 0);
3013 sa.childs[0].i_proposals[0].proposal_num = 1;
3014 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3015 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3016 sizeof (sa.childs[0].i_proposals[0].spi));
3020 /* Add NAT detection notification messages (mandatory) */
3021 u8 nat_detection_source[8 + 8 + 4 + 2];
3022 u8 *nat_detection_sha1 = vec_new (u8, 20);
3024 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3025 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3026 tmpspi = clib_host_to_net_u64 (sa.rspi);
3027 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3028 u16 tmpport = clib_host_to_net_u16 (500);
3029 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3031 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3032 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3033 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3034 nat_detection_sha1);
3035 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3036 nat_detection_sha1);
3037 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3038 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3039 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3040 nat_detection_sha1);
3041 ikev2_payload_add_notify (chain,
3042 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3043 nat_detection_sha1);
3044 vec_free (nat_detection_sha1);
3046 u8 *sig_hash_algo = vec_new (u8, 8);
3047 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3048 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3049 ikev2_payload_add_notify (chain,
3050 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3052 vec_free (sig_hash_algo);
3055 /* Buffer update and boilerplate */
3056 len += vec_len (chain->data);
3057 ike0->nextpayload = chain->first_payload_type;
3058 ike0->length = clib_host_to_net_u32 (len);
3059 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3060 ikev2_payload_destroy_chain (chain);
3062 ike0->version = IKE_VERSION_2;
3063 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3064 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3065 ike0->ispi = sa.ispi;
3069 /* store whole IKE payload - needed for PSK auth */
3070 vec_free (sa.last_sa_init_req_packet_data);
3071 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3073 /* add data to the SA then add it to the pool */
3074 sa.iaddr.as_u32 = if_ip->as_u32;
3075 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3076 sa.i_id.type = p->loc_id.type;
3077 sa.i_id.data = vec_dup (p->loc_id.data);
3078 sa.i_auth.method = p->auth.method;
3079 sa.i_auth.hex = p->auth.hex;
3080 sa.i_auth.data = vec_dup (p->auth.data);
3081 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3082 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3084 /* add SA to the pool */
3085 ikev2_sa_t *sa0 = 0;
3086 pool_get (km->sais, sa0);
3087 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3088 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3090 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3098 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3099 ikev2_child_sa_t * csa)
3101 /* Create the Initiator notification for child SA removal */
3102 ikev2_main_t *km = &ikev2_main;
3107 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3110 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3111 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3112 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3113 vec_resize (sa->del, 1);
3114 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3115 sa->del->spi = csa->i_proposals->spi;
3116 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3117 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3118 len = ikev2_generate_message (sa, ike0, 0);
3120 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3122 /* delete local child SA */
3123 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3124 ikev2_sa_del_child_sa (sa, csa);
3128 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3131 ikev2_main_t *km = &ikev2_main;
3132 ikev2_main_per_thread_data_t *tkm;
3133 ikev2_sa_t *fsa = 0;
3134 ikev2_child_sa_t *fchild = 0;
3136 /* Search for the child SA */
3137 vec_foreach (tkm, km->per_thread_data)
3143 pool_foreach (sa, tkm->sas, ({
3144 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3154 if (!fchild || !fsa)
3156 r = clib_error_return (0, "Child SA not found");
3161 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3168 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3171 ikev2_main_t *km = &ikev2_main;
3172 ikev2_main_per_thread_data_t *tkm;
3173 ikev2_sa_t *fsa = 0;
3174 ikev2_main_per_thread_data_t *ftkm = 0;
3176 /* Search for the IKE SA */
3177 vec_foreach (tkm, km->per_thread_data)
3183 pool_foreach (sa, tkm->sas, ({
3184 if (sa->ispi == ispi)
3196 r = clib_error_return (0, "IKE SA not found");
3201 /* Create the Initiator notification for IKE SA removal */
3207 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3210 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3211 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3212 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3213 vec_resize (fsa->del, 1);
3214 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3215 fsa->del->spi = ispi;
3216 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3217 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3218 len = ikev2_generate_message (fsa, ike0, 0);
3220 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3224 /* delete local SA */
3225 ikev2_child_sa_t *c;
3226 vec_foreach (c, fsa->childs)
3228 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3229 ikev2_sa_del_child_sa (fsa, c);
3231 ikev2_sa_free_all_vec (fsa);
3232 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3235 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3236 pool_put (ftkm->sas, fsa);
3244 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3245 ikev2_child_sa_t * csa)
3247 /* Create the Initiator request for create child SA */
3253 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3256 ike0->version = IKE_VERSION_2;
3257 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3258 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3259 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3260 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3261 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3262 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3264 ikev2_rekey_t *rekey;
3265 vec_add2 (sa->rekey, rekey, 1);
3266 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3269 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3270 rekey->spi = proposals[0].spi;
3271 rekey->ispi = csa->i_proposals->spi;
3272 len = ikev2_generate_message (sa, ike0, proposals);
3273 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3274 vec_free (proposals);
3278 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3281 ikev2_main_t *km = &ikev2_main;
3282 ikev2_main_per_thread_data_t *tkm;
3283 ikev2_sa_t *fsa = 0;
3284 ikev2_child_sa_t *fchild = 0;
3286 /* Search for the child SA */
3287 vec_foreach (tkm, km->per_thread_data)
3293 pool_foreach (sa, tkm->sas, ({
3294 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3304 if (!fchild || !fsa)
3306 r = clib_error_return (0, "Child SA not found");
3311 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3318 ikev2_init (vlib_main_t * vm)
3320 ikev2_main_t *km = &ikev2_main;
3321 vlib_thread_main_t *tm = vlib_get_thread_main ();
3324 clib_memset (km, 0, sizeof (ikev2_main_t));
3325 km->vnet_main = vnet_get_main ();
3328 ikev2_crypto_init (km);
3330 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3332 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3333 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3335 km->per_thread_data[thread_id].sa_by_rspi =
3336 hash_create (0, sizeof (uword));
3339 km->sa_by_ispi = hash_create (0, sizeof (uword));
3341 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3343 ikev2_cli_reference ();
3349 VLIB_INIT_FUNCTION (ikev2_init) =
3351 .runs_after = VLIB_INITS("ipsec_init"),
3357 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3359 ikev2_main_t *km = &ikev2_main;
3360 ikev2_profile_t *p = 0;
3361 vlib_main_t *vm = km->vlib_main;
3362 f64 now = vlib_time_now (vm);
3365 if (sa->is_profile_index_set)
3366 p = pool_elt_at_index (km->profiles, sa->profile_index);
3368 if (sa->is_initiator && p && csa->time_to_expiration
3369 && now > csa->time_to_expiration)
3371 if (!csa->is_expired || csa->rekey_retries > 0)
3373 ikev2_rekey_child_sa_internal (vm, sa, csa);
3374 csa->time_to_expiration = now + p->handover;
3375 csa->is_expired = 1;
3376 if (csa->rekey_retries == 0)
3378 csa->rekey_retries = 5;
3380 else if (csa->rekey_retries > 0)
3382 csa->rekey_retries--;
3383 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3384 csa->i_proposals->spi, csa->rekey_retries);
3385 if (csa->rekey_retries == 0)
3387 csa->rekey_retries = -1;
3394 csa->time_to_expiration = 0;
3395 ikev2_delete_child_sa_internal (vm, sa, csa);
3404 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3406 ikev2_main_t *km = &ikev2_main;
3407 vlib_main_t *vm = km->vlib_main;
3408 ikev2_main_per_thread_data_t *tkm;
3409 ikev2_sa_t *fsa = 0;
3410 ikev2_profile_t *p = 0;
3411 ikev2_child_sa_t *fchild = 0;
3412 f64 now = vlib_time_now (vm);
3413 vlib_counter_t counts;
3415 /* Search for the SA and child SA */
3416 vec_foreach (tkm, km->per_thread_data)
3422 pool_foreach (sa, tkm->sas, ({
3423 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3432 vlib_get_combined_counter (&ipsec_sa_counters,
3433 ipsec_sa->stat_index, &counts);
3435 if (fsa && fsa->is_profile_index_set)
3436 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3438 if (fchild && p && p->lifetime_maxdata)
3440 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3442 fchild->time_to_expiration = now;
3447 static vlib_node_registration_t ikev2_mngr_process_node;
3450 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3453 ikev2_main_t *km = &ikev2_main;
3454 ipsec_main_t *im = &ipsec_main;
3459 vlib_process_wait_for_event_or_clock (vm, 1);
3460 vlib_process_get_events (vm, NULL);
3462 /* process ike child sas */
3463 ikev2_main_per_thread_data_t *tkm;
3464 vec_foreach (tkm, km->per_thread_data)
3468 pool_foreach (sa, tkm->sas, ({
3469 ikev2_child_sa_t *c;
3470 vec_foreach (c, sa->childs)
3472 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3478 /* process ipsec sas */
3481 pool_foreach (sa, im->sad, ({
3482 ikev2_mngr_process_ipsec_sa(sa);
3488 vlib_process_wait_for_event_or_clock (vm, 5);
3489 vlib_process_get_events (vm, NULL);
3498 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3499 .function = ikev2_mngr_process_fn,
3500 .type = VLIB_NODE_TYPE_PROCESS,
3502 "ikev2-manager-process",
3505 VLIB_PLUGIN_REGISTER () = {
3506 .version = VPP_BUILD_VER,
3507 .description = "Internet Key Exchange (IKEv2) Protocol",
3512 * fd.io coding-style-patch-verification: ON
3515 * eval: (c-set-style "gnu")