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_all_child_sa (ikev2_child_sa_t ** childs)
250 vec_foreach (c, *childs)
252 ikev2_sa_free_proposal_vector (&c->r_proposals);
253 ikev2_sa_free_proposal_vector (&c->i_proposals);
264 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
266 ikev2_sa_free_proposal_vector (&child->r_proposals);
267 ikev2_sa_free_proposal_vector (&child->i_proposals);
268 vec_free (child->sk_ai);
269 vec_free (child->sk_ar);
270 vec_free (child->sk_ei);
271 vec_free (child->sk_er);
273 vec_del1 (sa->childs, child - sa->childs);
277 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
279 vec_free (sa->i_nonce);
280 vec_free (sa->i_dh_data);
281 vec_free (sa->dh_shared_key);
282 vec_free (sa->dh_private_key);
284 ikev2_sa_free_proposal_vector (&sa->r_proposals);
285 ikev2_sa_free_proposal_vector (&sa->i_proposals);
288 vec_free (sa->sk_ai);
289 vec_free (sa->sk_ar);
290 vec_free (sa->sk_ei);
291 vec_free (sa->sk_er);
292 vec_free (sa->sk_pi);
293 vec_free (sa->sk_pr);
295 vec_free (sa->i_id.data);
296 vec_free (sa->i_auth.data);
297 vec_free (sa->r_id.data);
298 vec_free (sa->r_auth.data);
300 EVP_PKEY_free (sa->r_auth.key);
304 ikev2_sa_free_all_child_sa (&sa->childs);
308 ikev2_delete_sa (ikev2_sa_t * sa)
310 ikev2_main_t *km = &ikev2_main;
311 u32 thread_index = vlib_get_thread_index ();
314 ikev2_sa_free_all_vec (sa);
316 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
319 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
320 pool_put (km->per_thread_data[thread_index].sas, sa);
325 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
327 ikev2_sa_transform_t *t = 0, *t2;
328 ikev2_main_t *km = &ikev2_main;
330 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
335 /* check if received DH group is on our list of supported groups */
336 vec_foreach (t2, km->supported_transforms)
338 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
347 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
348 vec_len (sa->i_dh_data));
349 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
353 if (sa->is_initiator)
356 RAND_bytes ((u8 *) & sa->ispi, 8);
359 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
360 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
365 RAND_bytes ((u8 *) & sa->rspi, 8);
368 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
369 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
372 /* generate dh keys */
373 ikev2_generate_dh (sa, t);
378 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
380 ikev2_sa_transform_t *t = 0, *t2;
381 ikev2_main_t *km = &ikev2_main;
384 /*move some data to the new SA */
385 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
386 sa->i_nonce = _(sai->i_nonce);
387 sa->i_dh_data = _(sai->i_dh_data);
388 sa->dh_private_key = _(sai->dh_private_key);
389 sa->iaddr.as_u32 = sai->iaddr.as_u32;
390 sa->raddr.as_u32 = sai->raddr.as_u32;
391 sa->is_initiator = sai->is_initiator;
392 sa->profile = sai->profile;
393 sa->i_id.type = sai->i_id.type;
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))
1282 vec_foreach(ts, sa->childs[0].tsr)
1284 if (ikev2_ts_cmp(p_tsr, ts))
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 ipsec_add_del_tunnel_args_t a;
1482 ikev2_sa_transform_t *tr;
1483 ikev2_sa_proposal_t *proposals;
1487 if (!child->r_proposals)
1489 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1493 clib_memset (&a, 0, sizeof (a));
1495 if (sa->is_initiator)
1497 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1498 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1499 proposals = child->i_proposals;
1500 a.local_spi = child->r_proposals[0].spi;
1501 a.remote_spi = child->i_proposals[0].spi;
1505 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1506 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1507 proposals = child->r_proposals;
1508 a.local_spi = child->i_proposals[0].spi;
1509 a.remote_spi = child->r_proposals[0].spi;
1513 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1515 a.esn = tr->esn_type;
1519 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1522 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1524 switch (tr->key_len)
1527 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1530 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1533 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1536 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1543 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1549 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1553 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1556 switch (tr->integ_type)
1558 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1559 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1561 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1562 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1564 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1565 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1567 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1568 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1571 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1577 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1581 ikev2_calc_child_keys (sa, child);
1583 u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1584 if (sa->is_initiator)
1586 loc_ikey = child->sk_ai;
1587 rem_ikey = child->sk_ar;
1588 loc_ckey = child->sk_ei;
1589 rem_ckey = child->sk_er;
1593 loc_ikey = child->sk_ar;
1594 rem_ikey = child->sk_ai;
1595 loc_ckey = child->sk_er;
1596 rem_ckey = child->sk_ei;
1599 a.integ_alg = integ_type;
1600 a.local_integ_key_len = vec_len (loc_ikey);
1601 clib_memcpy_fast (a.local_integ_key, loc_ikey, a.local_integ_key_len);
1602 a.remote_integ_key_len = vec_len (rem_ikey);
1603 clib_memcpy_fast (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
1605 a.crypto_alg = encr_type;
1606 a.local_crypto_key_len = vec_len (loc_ckey);
1607 clib_memcpy_fast (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
1608 a.remote_crypto_key_len = vec_len (rem_ckey);
1609 clib_memcpy_fast (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
1611 if (sa->profile && sa->profile->lifetime)
1613 child->time_to_expiration = vlib_time_now (vnm->vlib_main)
1614 + sa->profile->lifetime;
1615 if (sa->profile->lifetime_jitter)
1617 // This is not much better than rand(3), which Coverity warns
1618 // is unsuitable for security applications; random_u32 is
1619 // however fast. If this perturbance to the expiration time
1620 // needs to use a better RNG then we may need to use something
1621 // like /dev/urandom which has significant overhead.
1622 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1623 rnd = random_u32 (&rnd);
1625 child->time_to_expiration +=
1626 1 + (rnd % sa->profile->lifetime_jitter);
1630 ipsec_add_del_tunnel_if (&a);
1636 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1637 ikev2_child_sa_t * child)
1639 ipsec_add_del_tunnel_args_t a;
1641 if (sa->is_initiator)
1643 if (!vec_len (child->i_proposals))
1647 a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
1648 a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
1649 a.local_spi = child->r_proposals[0].spi;
1650 a.remote_spi = child->i_proposals[0].spi;
1654 if (!vec_len (child->r_proposals))
1658 a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
1659 a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
1660 a.local_spi = child->i_proposals[0].spi;
1661 a.remote_spi = child->r_proposals[0].spi;
1664 ipsec_add_del_tunnel_if (&a);
1669 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1672 ike_payload_header_t *ph;
1676 ikev2_sa_transform_t *tr_encr, *tr_integ;
1678 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1680 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1682 ikev2_payload_chain_t *chain = 0;
1683 ikev2_payload_new_chain (chain);
1685 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1687 if (sa->r_proposals == 0)
1689 ikev2_payload_add_notify (chain,
1690 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1691 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1693 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1695 u8 *data = vec_new (u8, 2);
1696 ikev2_sa_transform_t *tr_dh;
1698 ikev2_sa_get_td_for_type (sa->r_proposals,
1699 IKEV2_TRANSFORM_TYPE_DH);
1700 ASSERT (tr_dh && tr_dh->dh_type);
1702 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1703 data[1] = (tr_dh->dh_type) & 0xff;
1705 ikev2_payload_add_notify (chain,
1706 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1709 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1711 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1713 u8 *data = vec_new (u8, 1);
1715 data[0] = sa->unsupported_cp;
1716 ikev2_payload_add_notify (chain,
1717 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1723 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1724 ikev2_payload_add_sa (chain, sa->r_proposals);
1725 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1726 ikev2_payload_add_nonce (chain, sa->r_nonce);
1729 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1731 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1733 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1734 ikev2_payload_add_auth (chain, &sa->r_auth);
1735 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1736 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1737 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1739 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1741 ikev2_payload_add_notify (chain,
1742 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1744 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1746 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1748 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1750 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1751 ikev2_payload_add_auth (chain, &sa->r_auth);
1753 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1755 ikev2_payload_add_notify (chain,
1756 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
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_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1760 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1762 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1764 u8 *data = vec_new (u8, 1);
1766 data[0] = sa->unsupported_cp;
1767 ikev2_payload_add_notify (chain,
1768 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1772 else if (sa->state == IKEV2_STATE_SA_INIT)
1774 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1775 ikev2_payload_add_auth (chain, &sa->i_auth);
1776 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1777 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1778 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1782 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1786 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1788 /* if pending delete */
1791 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1793 if (sa->is_initiator)
1794 ikev2_payload_add_delete (chain, sa->del);
1796 /* The response to a request that deletes the IKE SA is an empty
1797 INFORMATIONAL response. */
1798 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1800 /* The response to a request that deletes ESP or AH SAs will contain
1801 delete payloads for the paired SAs going in the other direction. */
1804 ikev2_payload_add_delete (chain, sa->del);
1809 /* received N(AUTHENTICATION_FAILED) */
1810 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1812 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1815 /* received unsupported critical payload */
1816 else if (sa->unsupported_cp)
1818 u8 *data = vec_new (u8, 1);
1820 data[0] = sa->unsupported_cp;
1821 ikev2_payload_add_notify (chain,
1822 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1825 sa->unsupported_cp = 0;
1827 /* else send empty response */
1829 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1831 if (sa->is_initiator)
1834 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1835 ikev2_notify_t notify;
1836 u8 *data = vec_new (u8, 4);
1837 clib_memset (¬ify, 0, sizeof (notify));
1838 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1839 notify.spi = sa->childs[0].i_proposals->spi;
1840 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1842 ikev2_payload_add_sa (chain, proposals);
1843 ikev2_payload_add_nonce (chain, sa->i_nonce);
1844 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1845 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1846 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1855 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1856 ikev2_payload_add_nonce (chain, sa->r_nonce);
1857 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1859 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1861 vec_del1 (sa->rekey, 0);
1863 else if (sa->unsupported_cp)
1865 u8 *data = vec_new (u8, 1);
1867 data[0] = sa->unsupported_cp;
1868 ikev2_payload_add_notify (chain,
1869 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1872 sa->unsupported_cp = 0;
1876 ikev2_payload_add_notify (chain,
1877 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1884 ike->version = IKE_VERSION_2;
1885 ike->nextpayload = IKEV2_PAYLOAD_SK;
1886 tlen = sizeof (*ike);
1887 if (sa->is_initiator)
1889 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1890 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1894 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1898 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1900 tlen += vec_len (chain->data);
1901 ike->nextpayload = chain->first_payload_type;
1902 ike->length = clib_host_to_net_u32 (tlen);
1903 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
1905 /* store whole IKE payload - needed for PSK auth */
1906 vec_free (sa->last_sa_init_res_packet_data);
1907 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1912 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1915 plen = sizeof (*ph);
1916 ph = (ike_payload_header_t *) & ike->payload[0];
1917 ph->nextpayload = chain->first_payload_type;
1919 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1922 /* add space for hmac */
1923 plen += tr_integ->key_trunc;
1926 /* payload and total length */
1927 ph->length = clib_host_to_net_u16 (plen);
1928 ike->length = clib_host_to_net_u32 (tlen);
1930 /* calc integrity data for whole packet except hash itself */
1932 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1933 (u8 *) ike, tlen - tr_integ->key_trunc);
1935 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
1936 sizeof (*ike), integ, tr_integ->key_trunc);
1938 /* store whole IKE payload - needed for retransmit */
1939 vec_free (sa->last_res_packet_data);
1940 vec_add (sa->last_res_packet_data, ike, tlen);
1944 ikev2_payload_destroy_chain (chain);
1950 ikev2_retransmit_sa_init (ike_header_t * ike,
1951 ip4_address_t iaddr, ip4_address_t raddr)
1953 ikev2_main_t *km = &ikev2_main;
1955 u32 thread_index = vlib_get_thread_index ();
1958 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1959 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1960 sa->iaddr.as_u32 == iaddr.as_u32 &&
1961 sa->raddr.as_u32 == raddr.as_u32)
1964 u32 len = clib_net_to_host_u32(ike->length);
1965 u8 payload = ike->nextpayload;
1967 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1968 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1969 u32 plen = clib_net_to_host_u16(ikep->length);
1971 if (plen < sizeof(ike_payload_header_t))
1974 if (payload == IKEV2_PAYLOAD_NONCE)
1976 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1978 /* req is retransmit */
1979 if (sa->state == IKEV2_STATE_SA_INIT)
1982 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1983 ike->ispi = tmp->ispi;
1984 ike->rspi = tmp->rspi;
1985 ike->nextpayload = tmp->nextpayload;
1986 ike->version = tmp->version;
1987 ike->exchange = tmp->exchange;
1988 ike->flags = tmp->flags;
1989 ike->msgid = tmp->msgid;
1990 ike->length = tmp->length;
1991 clib_memcpy_fast(ike->payload, tmp->payload,
1992 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1993 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1994 format_ip4_address, &raddr,
1995 format_ip4_address, &iaddr);
1998 /* else ignore req */
2001 clib_warning("IKE_SA_INIT ignore from %U to %U",
2002 format_ip4_address, &raddr,
2003 format_ip4_address, &iaddr);
2008 payload = ikep->nextpayload;
2015 /* req is not retransmit */
2020 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2022 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2025 if (msg_id > sa->last_msg_id)
2027 sa->last_msg_id = msg_id;
2030 /* retransmitted req */
2031 else if (msg_id == sa->last_msg_id)
2034 tmp = (ike_header_t *) sa->last_res_packet_data;
2035 ike->ispi = tmp->ispi;
2036 ike->rspi = tmp->rspi;
2037 ike->nextpayload = tmp->nextpayload;
2038 ike->version = tmp->version;
2039 ike->exchange = tmp->exchange;
2040 ike->flags = tmp->flags;
2041 ike->msgid = tmp->msgid;
2042 ike->length = tmp->length;
2043 clib_memcpy_fast (ike->payload, tmp->payload,
2044 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2045 clib_warning ("IKE msgid %u retransmit from %U to %U",
2047 format_ip4_address, &sa->raddr,
2048 format_ip4_address, &sa->iaddr);
2051 /* old req ignore */
2054 clib_warning ("IKE msgid %u req ignore from %U to %U",
2056 format_ip4_address, &sa->raddr,
2057 format_ip4_address, &sa->iaddr);
2064 ikev2_node_fn (vlib_main_t * vm,
2065 vlib_node_runtime_t * node, vlib_frame_t * frame)
2067 u32 n_left_from, *from, *to_next;
2068 ikev2_next_t next_index;
2069 ikev2_main_t *km = &ikev2_main;
2070 u32 thread_index = vlib_get_thread_index ();
2072 from = vlib_frame_vector_args (frame);
2073 n_left_from = frame->n_vectors;
2074 next_index = node->cached_next_index;
2076 while (n_left_from > 0)
2080 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2082 while (n_left_from > 0 && n_left_to_next > 0)
2086 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2091 ikev2_sa_t *sa0 = 0;
2092 ikev2_sa_t sa; /* temporary store for SA */
2096 /* speculatively enqueue b0 to the current next frame */
2102 n_left_to_next -= 1;
2104 b0 = vlib_get_buffer (vm, bi0);
2105 ike0 = vlib_buffer_get_current (b0);
2106 vlib_buffer_advance (b0, -sizeof (*udp0));
2107 udp0 = vlib_buffer_get_current (b0);
2108 vlib_buffer_advance (b0, -sizeof (*ip40));
2109 ip40 = vlib_buffer_get_current (b0);
2111 if (ike0->version != IKE_VERSION_2)
2113 vlib_node_increment_counter (vm, ikev2_node.index,
2114 IKEV2_ERROR_NOT_IKEV2, 1);
2118 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2121 clib_memset (sa0, 0, sizeof (*sa0));
2123 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2125 if (ike0->rspi == 0)
2127 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2128 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2130 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2134 vlib_node_increment_counter (vm, ikev2_node.index,
2135 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2137 len = clib_net_to_host_u32 (ike0->length);
2142 vlib_node_increment_counter (vm, ikev2_node.index,
2143 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2148 ikev2_process_sa_init_req (vm, sa0, ike0);
2150 if (sa0->state == IKEV2_STATE_SA_INIT)
2152 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2154 ikev2_select_proposal (sa0->i_proposals,
2155 IKEV2_PROTOCOL_IKE);
2156 ikev2_generate_sa_init_data (sa0);
2159 if (sa0->state == IKEV2_STATE_SA_INIT
2160 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2162 len = ikev2_generate_message (sa0, ike0, 0);
2165 if (sa0->state == IKEV2_STATE_SA_INIT)
2167 /* add SA to the pool */
2168 pool_get (km->per_thread_data[thread_index].sas,
2170 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2172 per_thread_data[thread_index].sa_by_rspi,
2175 km->per_thread_data[thread_index].sas);
2179 ikev2_sa_free_all_vec (sa0);
2183 else //received sa_init without initiator flag
2185 ikev2_process_sa_init_resp (vm, sa0, ike0);
2187 if (sa0->state == IKEV2_STATE_SA_INIT)
2189 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2190 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2194 pool_elt_at_index (km->sais, p[0]);
2196 ikev2_complete_sa_data (sa0, sai);
2197 ikev2_calc_keys (sa0);
2198 ikev2_sa_auth_init (sa0);
2199 len = ikev2_generate_message (sa0, ike0, 0);
2203 if (sa0->state == IKEV2_STATE_SA_INIT)
2205 /* add SA to the pool */
2206 pool_get (km->per_thread_data[thread_index].sas, sa0);
2207 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2208 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2210 sa0 - km->per_thread_data[thread_index].sas);
2214 ikev2_sa_free_all_vec (sa0);
2218 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2221 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2222 clib_net_to_host_u64 (ike0->rspi));
2226 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2229 r = ikev2_retransmit_resp (sa0, ike0);
2232 vlib_node_increment_counter (vm, ikev2_node.index,
2233 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2235 len = clib_net_to_host_u32 (ike0->length);
2240 vlib_node_increment_counter (vm, ikev2_node.index,
2241 IKEV2_ERROR_IKE_REQ_IGNORE,
2246 ikev2_process_auth_req (vm, sa0, ike0);
2247 ikev2_sa_auth (sa0);
2248 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2250 ikev2_initial_contact_cleanup (sa0);
2251 ikev2_sa_match_ts (sa0);
2252 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2253 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2257 if (sa0->is_initiator)
2259 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2263 pool_elt_at_index (km->sais, p[0]);
2264 hash_unset (km->sa_by_ispi, sai->ispi);
2265 ikev2_sa_free_all_vec (sai);
2266 pool_put (km->sais, sai);
2271 len = ikev2_generate_message (sa0, ike0, 0);
2275 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2278 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2279 clib_net_to_host_u64 (ike0->rspi));
2283 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2286 r = ikev2_retransmit_resp (sa0, ike0);
2289 vlib_node_increment_counter (vm, ikev2_node.index,
2290 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2292 len = clib_net_to_host_u32 (ike0->length);
2297 vlib_node_increment_counter (vm, ikev2_node.index,
2298 IKEV2_ERROR_IKE_REQ_IGNORE,
2303 ikev2_process_informational_req (vm, sa0, ike0);
2306 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2308 ikev2_delete_t *d, *tmp, *resp = 0;
2309 vec_foreach (d, sa0->del)
2311 ikev2_child_sa_t *ch_sa;
2312 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2314 !sa0->is_initiator);
2317 ikev2_delete_tunnel_interface (km->vnet_main,
2319 if (!sa0->is_initiator)
2321 vec_add2 (resp, tmp, 1);
2322 tmp->protocol_id = d->protocol_id;
2323 tmp->spi = ch_sa->r_proposals[0].spi;
2325 ikev2_sa_del_child_sa (sa0, ch_sa);
2328 if (!sa0->is_initiator)
2330 vec_free (sa0->del);
2335 if (!sa0->is_initiator)
2337 len = ikev2_generate_message (sa0, ike0, 0);
2341 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2344 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2345 clib_net_to_host_u64 (ike0->rspi));
2349 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2352 r = ikev2_retransmit_resp (sa0, ike0);
2355 vlib_node_increment_counter (vm, ikev2_node.index,
2356 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2358 len = clib_net_to_host_u32 (ike0->length);
2363 vlib_node_increment_counter (vm, ikev2_node.index,
2364 IKEV2_ERROR_IKE_REQ_IGNORE,
2369 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2372 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2374 ikev2_child_sa_t *child;
2375 vec_add2 (sa0->childs, child, 1);
2376 child->r_proposals = sa0->rekey[0].r_proposal;
2377 child->i_proposals = sa0->rekey[0].i_proposal;
2378 child->tsi = sa0->rekey[0].tsi;
2379 child->tsr = sa0->rekey[0].tsr;
2380 ikev2_create_tunnel_interface (km->vnet_main, sa0,
2383 if (sa0->is_initiator)
2385 vec_del1 (sa0->rekey, 0);
2389 len = ikev2_generate_message (sa0, ike0, 0);
2396 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2398 format_ip4_address, ip40->src_address.as_u8,
2399 format_ip4_address, ip40->dst_address.as_u8);
2403 /* if we are sending packet back, rewrite headers */
2406 next0 = IKEV2_NEXT_IP4_LOOKUP;
2407 if (sa0->is_initiator)
2409 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2410 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2414 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2415 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2418 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2420 b0->current_length =
2421 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2422 ip40->length = clib_host_to_net_u16 (b0->current_length);
2423 ip40->checksum = ip4_header_checksum (ip40);
2426 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2427 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2429 ikev2_child_sa_t *c;
2431 vec_foreach (c, sa0->childs)
2432 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2434 ikev2_delete_sa (sa0);
2436 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2438 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2439 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2441 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2442 t->sw_if_index = sw_if_index0;
2443 t->next_index = next0;
2446 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2447 n_left_to_next, bi0, next0);
2450 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2453 vlib_node_increment_counter (vm, ikev2_node.index,
2454 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2455 return frame->n_vectors;
2459 VLIB_REGISTER_NODE (ikev2_node,static) = {
2460 .function = ikev2_node_fn,
2462 .vector_size = sizeof (u32),
2463 .format_trace = format_ikev2_trace,
2464 .type = VLIB_NODE_TYPE_INTERNAL,
2466 .n_errors = ARRAY_LEN(ikev2_error_strings),
2467 .error_strings = ikev2_error_strings,
2469 .n_next_nodes = IKEV2_N_NEXT,
2472 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2473 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2478 // set ikev2 proposals when vpp is used as initiator
2479 static clib_error_t *
2480 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2481 ikev2_transforms_set * ts,
2482 ikev2_sa_proposal_t ** proposals, int is_ike)
2485 ikev2_main_t *km = &ikev2_main;
2486 ikev2_sa_proposal_t *proposal;
2487 vec_add2 (*proposals, proposal, 1);
2488 ikev2_sa_transform_t *td;
2493 vec_foreach (td, km->supported_transforms)
2495 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2496 && td->encr_type == ts->crypto_alg
2497 && td->key_len == ts->crypto_key_size / 8)
2500 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2501 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2502 vec_add (td->attrs, (u8 *) attr, 4);
2503 vec_add1 (proposal->transforms, *td);
2512 r = clib_error_return (0, "Unsupported algorithm");
2518 vec_foreach (td, km->supported_transforms)
2520 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2521 && td->integ_type == ts->integ_alg)
2523 vec_add1 (proposal->transforms, *td);
2531 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2532 r = clib_error_return (0, "Unsupported algorithm");
2540 vec_foreach (td, km->supported_transforms)
2542 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2543 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2545 vec_add1 (proposal->transforms, *td);
2552 r = clib_error_return (0, "Unsupported algorithm");
2559 vec_foreach (td, km->supported_transforms)
2561 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2563 vec_add1 (proposal->transforms, *td);
2566 sa->dh_group = td->dh_type;
2574 r = clib_error_return (0, "Unsupported algorithm");
2581 vec_foreach (td, km->supported_transforms)
2583 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2585 vec_add1 (proposal->transforms, *td);
2592 r = clib_error_return (0, "Unsupported algorithm");
2601 static ikev2_profile_t *
2602 ikev2_profile_index_by_name (u8 * name)
2604 ikev2_main_t *km = &ikev2_main;
2607 p = mhash_get (&km->profile_index_by_name, name);
2611 return pool_elt_at_index (km->profiles, p[0]);
2616 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2625 b0 = vlib_get_buffer (vm, bi0);
2626 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2627 udp0 = vlib_buffer_get_current (b0);
2628 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2629 ip40 = vlib_buffer_get_current (b0);
2632 ip40->ip_version_and_header_length = 0x45;
2634 ip40->fragment_id = 0;
2635 ip40->flags_and_fragment_offset = 0;
2637 ip40->protocol = IP_PROTOCOL_UDP;
2638 ip40->dst_address.as_u32 = dst->as_u32;
2639 ip40->src_address.as_u32 = src->as_u32;
2640 udp0->dst_port = clib_host_to_net_u16 (500);
2641 udp0->src_port = clib_host_to_net_u16 (500);
2642 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2644 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2645 ip40->length = clib_host_to_net_u16 (b0->current_length);
2646 ip40->checksum = ip4_header_checksum (ip40);
2649 /* send the request */
2650 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2651 to_next = vlib_frame_vector_args (f);
2654 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2659 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2662 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2667 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2668 *ike = vlib_buffer_get_current (b0);
2673 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2675 ikev2_main_t *km = &ikev2_main;
2677 km->pkey = ikev2_load_key_file (file);
2678 if (km->pkey == NULL)
2679 return clib_error_return (0, "load key '%s' failed", file);
2685 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2687 ikev2_main_t *km = &ikev2_main;
2692 if (ikev2_profile_index_by_name (name))
2693 return clib_error_return (0, "policy %v already exists", name);
2695 pool_get (km->profiles, p);
2696 clib_memset (p, 0, sizeof (*p));
2697 p->name = vec_dup (name);
2698 p->responder.sw_if_index = ~0;
2699 uword index = p - km->profiles;
2700 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2704 p = ikev2_profile_index_by_name (name);
2706 return clib_error_return (0, "policy %v does not exists", name);
2709 pool_put (km->profiles, p);
2710 mhash_unset (&km->profile_index_by_name, name, 0);
2716 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2717 u8 * auth_data, u8 data_hex_format)
2722 p = ikev2_profile_index_by_name (name);
2726 r = clib_error_return (0, "unknown profile %v", name);
2729 vec_free (p->auth.data);
2730 p->auth.method = auth_method;
2731 p->auth.data = vec_dup (auth_data);
2732 p->auth.hex = data_hex_format;
2734 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2736 vec_add1 (p->auth.data, 0);
2738 EVP_PKEY_free (p->auth.key);
2739 p->auth.key = ikev2_load_cert_file (auth_data);
2740 if (p->auth.key == NULL)
2741 return clib_error_return (0, "load cert '%s' failed", auth_data);
2748 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2754 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2755 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2757 r = clib_error_return (0, "unsupported identity type %U",
2758 format_ikev2_id_type, id_type);
2762 p = ikev2_profile_index_by_name (name);
2766 r = clib_error_return (0, "unknown profile %v", name);
2772 vec_free (p->loc_id.data);
2773 p->loc_id.type = id_type;
2774 p->loc_id.data = vec_dup (data);
2778 vec_free (p->rem_id.data);
2779 p->rem_id.type = id_type;
2780 p->rem_id.data = vec_dup (data);
2787 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2788 u16 start_port, u16 end_port, ip4_address_t start_addr,
2789 ip4_address_t end_addr, int is_local)
2794 p = ikev2_profile_index_by_name (name);
2798 r = clib_error_return (0, "unknown profile %v", name);
2804 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2805 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2806 p->loc_ts.start_port = start_port;
2807 p->loc_ts.end_port = end_port;
2808 p->loc_ts.protocol_id = protocol_id;
2809 p->loc_ts.ts_type = 7;
2813 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2814 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2815 p->rem_ts.start_port = start_port;
2816 p->rem_ts.end_port = end_port;
2817 p->rem_ts.protocol_id = protocol_id;
2818 p->rem_ts.ts_type = 7;
2826 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2827 u32 sw_if_index, ip4_address_t ip4)
2832 p = ikev2_profile_index_by_name (name);
2836 r = clib_error_return (0, "unknown profile %v", name);
2840 p->responder.sw_if_index = sw_if_index;
2841 p->responder.ip4 = ip4;
2847 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2848 ikev2_transform_encr_type_t crypto_alg,
2849 ikev2_transform_integ_type_t integ_alg,
2850 ikev2_transform_dh_type_t dh_type,
2851 u32 crypto_key_size)
2856 p = ikev2_profile_index_by_name (name);
2860 r = clib_error_return (0, "unknown profile %v", name);
2864 p->ike_ts.crypto_alg = crypto_alg;
2865 p->ike_ts.integ_alg = integ_alg;
2866 p->ike_ts.dh_type = dh_type;
2867 p->ike_ts.crypto_key_size = crypto_key_size;
2872 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
2873 ikev2_transform_encr_type_t crypto_alg,
2874 ikev2_transform_integ_type_t integ_alg,
2875 ikev2_transform_dh_type_t dh_type,
2876 u32 crypto_key_size)
2881 p = ikev2_profile_index_by_name (name);
2885 r = clib_error_return (0, "unknown profile %v", name);
2889 p->esp_ts.crypto_alg = crypto_alg;
2890 p->esp_ts.integ_alg = integ_alg;
2891 p->esp_ts.dh_type = dh_type;
2892 p->esp_ts.crypto_key_size = crypto_key_size;
2897 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
2898 u64 lifetime, u32 jitter, u32 handover,
2904 p = ikev2_profile_index_by_name (name);
2908 r = clib_error_return (0, "unknown profile %v", name);
2912 p->lifetime = lifetime;
2913 p->lifetime_jitter = jitter;
2914 p->handover = handover;
2915 p->lifetime_maxdata = maxdata;
2920 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
2924 ip4_main_t *im = &ip4_main;
2925 ikev2_main_t *km = &ikev2_main;
2927 p = ikev2_profile_index_by_name (name);
2931 r = clib_error_return (0, "unknown profile %v", name);
2935 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2937 r = clib_error_return (0, "responder not set for profile %v", name);
2942 /* Create the Initiator Request */
2946 ip_lookup_main_t *lm = &im->lookup_main;
2948 int len = sizeof (ike_header_t);
2950 /* Get own iface IP */
2952 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
2953 ip_interface_address_t *if_add =
2954 pool_elt_at_index (lm->if_address_pool, if_add_index0);
2955 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2957 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2959 /* Prepare the SA and the IKE payload */
2961 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
2962 ikev2_payload_chain_t *chain = 0;
2963 ikev2_payload_new_chain (chain);
2965 /* Build the IKE proposal payload */
2966 ikev2_sa_proposal_t *proposals = 0;
2967 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2968 proposals[0].proposal_num = 1;
2969 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2971 /* Add and then cleanup proposal data */
2972 ikev2_payload_add_sa (chain, proposals);
2973 ikev2_sa_free_proposal_vector (&proposals);
2975 sa.is_initiator = 1;
2977 sa.state = IKEV2_STATE_SA_INIT;
2978 ikev2_generate_sa_init_data (&sa);
2979 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2980 ikev2_payload_add_nonce (chain, sa.i_nonce);
2982 /* Build the child SA proposal */
2983 vec_resize (sa.childs, 1);
2984 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2985 &sa.childs[0].i_proposals, 0);
2986 sa.childs[0].i_proposals[0].proposal_num = 1;
2987 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
2988 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2989 sizeof (sa.childs[0].i_proposals[0].spi));
2993 /* Add NAT detection notification messages (mandatory) */
2994 u8 nat_detection_source[8 + 8 + 4 + 2];
2995 u8 *nat_detection_sha1 = vec_new (u8, 20);
2997 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2998 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2999 tmpspi = clib_host_to_net_u64 (sa.rspi);
3000 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3001 u16 tmpport = clib_host_to_net_u16 (500);
3002 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3004 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3005 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3006 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3007 nat_detection_sha1);
3008 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3009 nat_detection_sha1);
3010 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3011 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3012 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3013 nat_detection_sha1);
3014 ikev2_payload_add_notify (chain,
3015 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3016 nat_detection_sha1);
3017 vec_free (nat_detection_sha1);
3019 u8 *sig_hash_algo = vec_new (u8, 8);
3020 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3021 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3022 ikev2_payload_add_notify (chain,
3023 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3025 vec_free (sig_hash_algo);
3028 /* Buffer update and boilerplate */
3029 len += vec_len (chain->data);
3030 ike0->nextpayload = chain->first_payload_type;
3031 ike0->length = clib_host_to_net_u32 (len);
3032 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3033 ikev2_payload_destroy_chain (chain);
3035 ike0->version = IKE_VERSION_2;
3036 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3037 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3038 ike0->ispi = sa.ispi;
3040 /* store whole IKE payload - needed for PSK auth */
3041 vec_free (sa.last_sa_init_req_packet_data);
3042 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3044 /* add data to the SA then add it to the pool */
3045 sa.iaddr.as_u32 = if_ip->as_u32;
3046 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3047 sa.i_id.type = p->loc_id.type;
3048 sa.i_id.data = vec_dup (p->loc_id.data);
3049 sa.i_auth.method = p->auth.method;
3050 sa.i_auth.hex = p->auth.hex;
3051 sa.i_auth.data = vec_dup (p->auth.data);
3052 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
3053 clib_memcpy_fast (sa.i_auth.key, p->auth.key,
3054 EVP_PKEY_size (p->auth.key));
3056 sa.i_auth.key = vec_dup (p->auth.key);
3058 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3059 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3061 /* add SA to the pool */
3062 ikev2_sa_t *sa0 = 0;
3063 pool_get (km->sais, sa0);
3064 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3065 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3067 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3075 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3076 ikev2_child_sa_t * csa)
3078 /* Create the Initiator notification for child SA removal */
3079 ikev2_main_t *km = &ikev2_main;
3084 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3087 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3088 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3089 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3090 vec_resize (sa->del, 1);
3091 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3092 sa->del->spi = csa->i_proposals->spi;
3093 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3094 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3095 len = ikev2_generate_message (sa, ike0, 0);
3097 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3099 /* delete local child SA */
3100 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3101 ikev2_sa_del_child_sa (sa, csa);
3105 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3108 ikev2_main_t *km = &ikev2_main;
3109 ikev2_main_per_thread_data_t *tkm;
3110 ikev2_sa_t *fsa = 0;
3111 ikev2_child_sa_t *fchild = 0;
3113 /* Search for the child SA */
3114 vec_foreach (tkm, km->per_thread_data)
3120 pool_foreach (sa, tkm->sas, ({
3121 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3131 if (!fchild || !fsa)
3133 r = clib_error_return (0, "Child SA not found");
3138 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3145 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3148 ikev2_main_t *km = &ikev2_main;
3149 ikev2_main_per_thread_data_t *tkm;
3150 ikev2_sa_t *fsa = 0;
3151 ikev2_main_per_thread_data_t *ftkm = 0;
3153 /* Search for the IKE SA */
3154 vec_foreach (tkm, km->per_thread_data)
3160 pool_foreach (sa, tkm->sas, ({
3161 if (sa->ispi == ispi)
3173 r = clib_error_return (0, "IKE SA not found");
3178 /* Create the Initiator notification for IKE SA removal */
3184 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3187 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3188 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3189 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3190 vec_resize (fsa->del, 1);
3191 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3192 fsa->del->spi = ispi;
3193 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3194 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3195 len = ikev2_generate_message (fsa, ike0, 0);
3197 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3201 /* delete local SA */
3202 ikev2_child_sa_t *c;
3203 vec_foreach (c, fsa->childs)
3205 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3206 ikev2_sa_del_child_sa (fsa, c);
3208 ikev2_sa_free_all_vec (fsa);
3209 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3212 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3213 pool_put (ftkm->sas, fsa);
3221 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3222 ikev2_child_sa_t * csa)
3224 /* Create the Initiator request for create child SA */
3230 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3233 ike0->version = IKE_VERSION_2;
3234 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3235 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3236 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3237 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3238 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3239 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3241 ikev2_rekey_t *rekey;
3242 vec_add2 (sa->rekey, rekey, 1);
3243 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3246 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3247 rekey->spi = proposals[0].spi;
3248 rekey->ispi = csa->i_proposals->spi;
3249 len = ikev2_generate_message (sa, ike0, proposals);
3250 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3251 vec_free (proposals);
3255 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3258 ikev2_main_t *km = &ikev2_main;
3259 ikev2_main_per_thread_data_t *tkm;
3260 ikev2_sa_t *fsa = 0;
3261 ikev2_child_sa_t *fchild = 0;
3263 /* Search for the child SA */
3264 vec_foreach (tkm, km->per_thread_data)
3270 pool_foreach (sa, tkm->sas, ({
3271 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3281 if (!fchild || !fsa)
3283 r = clib_error_return (0, "Child SA not found");
3288 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3295 ikev2_init (vlib_main_t * vm)
3297 ikev2_main_t *km = &ikev2_main;
3298 clib_error_t *error;
3299 vlib_thread_main_t *tm = vlib_get_thread_main ();
3302 if ((error = vlib_call_init_function (vm, ipsec_init)))
3305 clib_memset (km, 0, sizeof (ikev2_main_t));
3306 km->vnet_main = vnet_get_main ();
3309 ikev2_crypto_init (km);
3311 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3313 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3314 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3316 km->per_thread_data[thread_id].sa_by_rspi =
3317 hash_create (0, sizeof (uword));
3320 km->sa_by_ispi = hash_create (0, sizeof (uword));
3323 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3326 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3331 VLIB_INIT_FUNCTION (ikev2_init);
3334 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3336 ikev2_main_t *km = &ikev2_main;
3337 vlib_main_t *vm = km->vlib_main;
3338 f64 now = vlib_time_now (vm);
3341 if (sa->is_initiator && sa->profile && csa->time_to_expiration
3342 && now > csa->time_to_expiration)
3344 if (!csa->is_expired || csa->rekey_retries > 0)
3346 ikev2_rekey_child_sa_internal (vm, sa, csa);
3347 csa->time_to_expiration = now + sa->profile->handover;
3348 csa->is_expired = 1;
3349 if (csa->rekey_retries == 0)
3351 csa->rekey_retries = 5;
3353 else if (csa->rekey_retries > 0)
3355 csa->rekey_retries--;
3356 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3357 csa->i_proposals->spi, csa->rekey_retries);
3358 if (csa->rekey_retries == 0)
3360 csa->rekey_retries = -1;
3367 csa->time_to_expiration = 0;
3368 ikev2_delete_child_sa_internal (vm, sa, csa);
3377 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3379 ikev2_main_t *km = &ikev2_main;
3380 vlib_main_t *vm = km->vlib_main;
3381 ikev2_main_per_thread_data_t *tkm;
3382 ikev2_sa_t *fsa = 0;
3383 ikev2_child_sa_t *fchild = 0;
3384 f64 now = vlib_time_now (vm);
3385 vlib_counter_t counts;
3387 /* Search for the SA and child SA */
3388 vec_foreach (tkm, km->per_thread_data)
3394 pool_foreach (sa, tkm->sas, ({
3395 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3404 vlib_get_combined_counter (&ipsec_sa_counters,
3405 ipsec_sa->stat_index, &counts);
3407 if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3409 if (!fchild->is_expired
3410 && counts.bytes > fsa->profile->lifetime_maxdata)
3412 fchild->time_to_expiration = now;
3417 static vlib_node_registration_t ikev2_mngr_process_node;
3420 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3423 ikev2_main_t *km = &ikev2_main;
3424 ipsec_main_t *im = &ipsec_main;
3429 vlib_process_wait_for_event_or_clock (vm, 1);
3430 vlib_process_get_events (vm, NULL);
3432 /* process ike child sas */
3433 ikev2_main_per_thread_data_t *tkm;
3434 vec_foreach (tkm, km->per_thread_data)
3438 pool_foreach (sa, tkm->sas, ({
3439 ikev2_child_sa_t *c;
3440 vec_foreach (c, sa->childs)
3442 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3448 /* process ipsec sas */
3451 pool_foreach (sa, im->sad, ({
3452 ikev2_mngr_process_ipsec_sa(sa);
3458 vlib_process_wait_for_event_or_clock (vm, 5);
3459 vlib_process_get_events (vm, NULL);
3468 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3469 .function = ikev2_mngr_process_fn,
3470 .type = VLIB_NODE_TYPE_PROCESS,
3472 "ikev2-manager-process",
3475 VLIB_PLUGIN_REGISTER () = {
3476 .version = VPP_BUILD_VER,
3477 .description = "IKEv2",
3482 * fd.io coding-style-patch-verification: ON
3485 * eval: (c-set-style "gnu")