2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
32 ikev2_main_t ikev2_main;
34 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
36 ikev2_child_sa_t * child);
38 #define ikev2_set_state(sa, v) do { \
40 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
50 format_ikev2_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
56 s = format (s, "ikev2: sw_if_index %d, next index %d",
57 t->sw_if_index, t->next_index);
61 static vlib_node_registration_t ikev2_node;
63 #define foreach_ikev2_error \
64 _(PROCESSED, "IKEv2 packets processed") \
65 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
66 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
67 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
68 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
69 _(NOT_IKEV2, "Non IKEv2 packets received")
73 #define _(sym,str) IKEV2_ERROR_##sym,
79 static char *ikev2_error_strings[] = {
80 #define _(sym,string) string,
87 IKEV2_NEXT_IP4_LOOKUP,
88 IKEV2_NEXT_ERROR_DROP,
92 static ikev2_sa_transform_t *
93 ikev2_find_transform_data (ikev2_sa_transform_t * t)
95 ikev2_main_t *km = &ikev2_main;
96 ikev2_sa_transform_t *td;
98 vec_foreach (td, km->supported_transforms)
100 if (td->type != t->type)
103 if (td->transform_id != t->transform_id)
106 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
108 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
109 || t->attrs[1] != 14)
112 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
120 static ikev2_sa_proposal_t *
121 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
122 ikev2_protocol_id_t prot_id)
124 ikev2_sa_proposal_t *rv = 0;
125 ikev2_sa_proposal_t *proposal;
126 ikev2_sa_transform_t *transform, *new_t;
127 u8 mandatory_bitmap, optional_bitmap;
129 if (prot_id == IKEV2_PROTOCOL_IKE)
131 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
132 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
133 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
134 optional_bitmap = mandatory_bitmap;
136 else if (prot_id == IKEV2_PROTOCOL_ESP)
138 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
139 (1 << IKEV2_TRANSFORM_TYPE_ESN);
140 optional_bitmap = mandatory_bitmap |
141 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
143 else if (prot_id == IKEV2_PROTOCOL_AH)
145 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
146 (1 << IKEV2_TRANSFORM_TYPE_ESN);
147 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
152 vec_add2 (rv, proposal, 1);
154 vec_foreach (proposal, proposals)
157 if (proposal->protocol_id != prot_id)
160 vec_foreach (transform, proposal->transforms)
162 if ((1 << transform->type) & bitmap)
165 if (ikev2_find_transform_data (transform))
167 bitmap |= 1 << transform->type;
168 vec_add2 (rv->transforms, new_t, 1);
169 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
170 new_t->attrs = vec_dup (transform->attrs);
174 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
175 (bitmap & ~optional_bitmap) == 0)
177 rv->proposal_num = proposal->proposal_num;
178 rv->protocol_id = proposal->protocol_id;
179 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
184 vec_free (rv->transforms);
193 ikev2_sa_transform_t *
194 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
195 ikev2_transform_type_t type)
197 ikev2_sa_transform_t *t;
202 vec_foreach (t, p->transforms)
205 return ikev2_find_transform_data (t);
211 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
215 vec_foreach (c, sa->childs)
217 ikev2_sa_proposal_t *proposal =
218 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
219 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
227 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
229 ikev2_sa_proposal_t *p;
230 ikev2_sa_transform_t *t;
237 vec_foreach (t, p->transforms)
241 vec_free (p->transforms);
247 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
249 ikev2_sa_free_proposal_vector (&c->r_proposals);
250 ikev2_sa_free_proposal_vector (&c->i_proposals);
260 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
263 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
269 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
271 ikev2_sa_free_child_sa (child);
272 vec_del1 (sa->childs, child - sa->childs);
276 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
278 vec_free (sa->i_nonce);
279 vec_free (sa->i_dh_data);
280 vec_free (sa->dh_shared_key);
281 vec_free (sa->dh_private_key);
283 ikev2_sa_free_proposal_vector (&sa->r_proposals);
284 ikev2_sa_free_proposal_vector (&sa->i_proposals);
287 vec_free (sa->sk_ai);
288 vec_free (sa->sk_ar);
289 vec_free (sa->sk_ei);
290 vec_free (sa->sk_er);
291 vec_free (sa->sk_pi);
292 vec_free (sa->sk_pr);
294 vec_free (sa->i_id.data);
295 vec_free (sa->i_auth.data);
296 vec_free (sa->r_id.data);
297 vec_free (sa->r_auth.data);
299 EVP_PKEY_free (sa->r_auth.key);
303 ikev2_sa_free_all_child_sa (&sa->childs);
307 ikev2_delete_sa (ikev2_sa_t * sa)
309 ikev2_main_t *km = &ikev2_main;
310 u32 thread_index = vlib_get_thread_index ();
313 ikev2_sa_free_all_vec (sa);
315 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
318 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
319 pool_put (km->per_thread_data[thread_index].sas, sa);
324 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
326 ikev2_sa_transform_t *t = 0, *t2;
327 ikev2_main_t *km = &ikev2_main;
329 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
334 /* check if received DH group is on our list of supported groups */
335 vec_foreach (t2, km->supported_transforms)
337 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
346 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
350 if (sa->is_initiator)
353 RAND_bytes ((u8 *) & sa->ispi, 8);
356 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
357 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
362 RAND_bytes ((u8 *) & sa->rspi, 8);
365 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
366 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
369 /* generate dh keys */
370 ikev2_generate_dh (sa, t);
375 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
377 ikev2_sa_transform_t *t = 0, *t2;
378 ikev2_main_t *km = &ikev2_main;
381 /*move some data to the new SA */
382 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
383 sa->i_nonce = _(sai->i_nonce);
384 sa->i_dh_data = _(sai->i_dh_data);
385 sa->dh_private_key = _(sai->dh_private_key);
386 sa->iaddr.as_u32 = sai->iaddr.as_u32;
387 sa->raddr.as_u32 = sai->raddr.as_u32;
388 sa->is_initiator = sai->is_initiator;
389 sa->i_id.type = sai->i_id.type;
390 sa->profile_index = sai->profile_index;
391 sa->is_profile_index_set = sai->is_profile_index_set;
392 sa->i_id.data = _(sai->i_id.data);
393 sa->i_auth.method = sai->i_auth.method;
394 sa->i_auth.hex = sai->i_auth.hex;
395 sa->i_auth.data = _(sai->i_auth.data);
396 sa->i_auth.key = _(sai->i_auth.key);
397 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
398 sa->childs = _(sai->childs);
402 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
407 /* check if received DH group is on our list of supported groups */
408 vec_foreach (t2, km->supported_transforms)
410 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
419 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
424 /* generate dh keys */
425 ikev2_complete_dh (sa, t);
430 ikev2_calc_keys (ikev2_sa_t * sa)
433 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
436 u16 integ_key_len = 0;
437 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
439 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
441 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
443 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
446 integ_key_len = tr_integ->key_len;
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 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;
480 sa->sk_ai = vec_new (u8, integ_key_len);
481 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
482 pos += integ_key_len;
485 sa->sk_ar = vec_new (u8, integ_key_len);
486 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
487 pos += integ_key_len;
491 sa->sk_ei = vec_new (u8, tr_encr->key_len);
492 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
493 pos += tr_encr->key_len;
496 sa->sk_er = vec_new (u8, tr_encr->key_len);
497 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
498 pos += tr_encr->key_len;
501 sa->sk_pi = vec_new (u8, tr_prf->key_len);
502 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
503 pos += tr_prf->key_len;
506 sa->sk_pr = vec_new (u8, tr_prf->key_len);
507 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
508 pos += tr_prf->key_len;
514 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
517 u16 integ_key_len = 0;
520 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
522 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
524 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
526 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
529 integ_key_len = ctr_integ->key_len;
531 salt_len = sizeof (u32);
533 vec_append (s, sa->i_nonce);
534 vec_append (s, sa->r_nonce);
535 /* calculate PRFplus */
537 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
539 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
544 child->sk_ei = vec_new (u8, ctr_encr->key_len);
545 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
546 pos += ctr_encr->key_len;
551 child->sk_ai = vec_new (u8, ctr_integ->key_len);
552 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
553 pos += ctr_integ->key_len;
557 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
562 child->sk_er = vec_new (u8, ctr_encr->key_len);
563 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
564 pos += ctr_encr->key_len;
569 child->sk_ar = vec_new (u8, integ_key_len);
570 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
571 pos += integ_key_len;
575 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
585 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
589 u32 len = clib_net_to_host_u32 (ike->length);
590 u8 payload = ike->nextpayload;
592 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
594 clib_net_to_host_u64 (ike->ispi),
595 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
597 sa->ispi = clib_net_to_host_u64 (ike->ispi);
599 /* store whole IKE payload - needed for PSK auth */
600 vec_free (sa->last_sa_init_req_packet_data);
601 vec_add (sa->last_sa_init_req_packet_data, ike, len);
603 while (p < len && payload != IKEV2_PAYLOAD_NONE)
605 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
606 u32 plen = clib_net_to_host_u16 (ikep->length);
608 if (plen < sizeof (ike_payload_header_t))
611 if (payload == IKEV2_PAYLOAD_SA)
613 ikev2_sa_free_proposal_vector (&sa->i_proposals);
614 sa->i_proposals = ikev2_parse_sa_payload (ikep);
616 else if (payload == IKEV2_PAYLOAD_KE)
618 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
619 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
620 vec_free (sa->i_dh_data);
621 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
623 else if (payload == IKEV2_PAYLOAD_NONCE)
625 vec_free (sa->i_nonce);
626 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
628 else if (payload == IKEV2_PAYLOAD_NOTIFY)
630 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
633 else if (payload == IKEV2_PAYLOAD_VENDOR)
635 ikev2_parse_vendor_payload (ikep);
639 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
641 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
643 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
644 sa->unsupported_cp = payload;
649 payload = ikep->nextpayload;
653 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
657 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
661 u32 len = clib_net_to_host_u32 (ike->length);
662 u8 payload = ike->nextpayload;
664 sa->ispi = clib_net_to_host_u64 (ike->ispi);
665 sa->rspi = clib_net_to_host_u64 (ike->rspi);
667 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
668 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
671 /* store whole IKE payload - needed for PSK auth */
672 vec_free (sa->last_sa_init_res_packet_data);
673 vec_add (sa->last_sa_init_res_packet_data, ike, len);
675 while (p < len && payload != IKEV2_PAYLOAD_NONE)
677 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
678 u32 plen = clib_net_to_host_u16 (ikep->length);
680 if (plen < sizeof (ike_payload_header_t))
683 if (payload == IKEV2_PAYLOAD_SA)
685 ikev2_sa_free_proposal_vector (&sa->r_proposals);
686 sa->r_proposals = ikev2_parse_sa_payload (ikep);
689 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
691 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
694 else if (payload == IKEV2_PAYLOAD_KE)
696 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
697 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
698 vec_free (sa->r_dh_data);
699 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
701 else if (payload == IKEV2_PAYLOAD_NONCE)
703 vec_free (sa->r_nonce);
704 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
706 else if (payload == IKEV2_PAYLOAD_NOTIFY)
708 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
711 else if (payload == IKEV2_PAYLOAD_VENDOR)
713 ikev2_parse_vendor_payload (ikep);
717 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
719 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
721 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
722 sa->unsupported_cp = payload;
727 payload = ikep->nextpayload;
733 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
738 u32 len = clib_net_to_host_u32 (ike->length);
739 ike_payload_header_t *ikep = 0;
741 ikev2_sa_transform_t *tr_integ;
743 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
746 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
748 ikep = (ike_payload_header_t *) & ike->payload[p];
749 plen = clib_net_to_host_u16 (ikep->length);
751 if (plen < sizeof (*ikep))
754 if (*payload == IKEV2_PAYLOAD_SK)
756 last_payload = *payload;
760 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
762 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
764 sa->unsupported_cp = *payload;
769 *payload = ikep->nextpayload;
773 if (last_payload != IKEV2_PAYLOAD_SK)
775 ikev2_elog_error ("Last payload must be SK");
780 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
781 (u8 *) ike, len - tr_integ->key_trunc);
783 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
785 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
787 ikev2_elog_error ("message integrity check failed");
793 return ikev2_decrypt_data (sa, ikep->payload, plen);
797 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
799 ikev2_main_t *km = &ikev2_main;
803 u32 thread_index = vlib_get_thread_index ();
805 if (!sa->initial_contact)
808 /* find old IKE SAs with the same authenticated identity */
810 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
811 if (tmp->i_id.type != sa->i_id.type ||
812 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
813 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
816 if (sa->rspi != tmp->rspi)
817 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
821 for (i = 0; i < vec_len (delete); i++)
824 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
826 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
828 ikev2_delete_sa (tmp);
832 sa->initial_contact = 0;
834 km->log_level = IKEV2_LOG_ERROR;
835 km->log_class = vlib_log_register_class ("ikev2", 0);
839 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
841 ikev2_child_sa_t *first_child_sa;
843 u8 payload = ike->nextpayload;
845 ike_payload_header_t *ikep;
848 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
849 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
850 clib_host_to_net_u64 (ike->rspi),
851 sa->is_initiator ? sa->raddr.as_u32 : sa->
854 ikev2_calc_keys (sa);
856 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
860 if (sa->unsupported_cp)
861 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
862 goto cleanup_and_exit;
865 /* select or create 1st child SA */
866 if (sa->is_initiator)
868 first_child_sa = &sa->childs[0];
872 ikev2_sa_free_all_child_sa (&sa->childs);
873 vec_add2 (sa->childs, first_child_sa, 1);
877 /* process encrypted payload */
879 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
881 ikep = (ike_payload_header_t *) & plaintext[p];
882 plen = clib_net_to_host_u16 (ikep->length);
884 if (plen < sizeof (ike_payload_header_t))
885 goto cleanup_and_exit;
887 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
889 if (sa->is_initiator)
891 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
892 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
896 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
897 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
900 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
902 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
904 sa->i_id.type = id->id_type;
905 vec_free (sa->i_id.data);
906 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
908 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
910 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
912 sa->r_id.type = id->id_type;
913 vec_free (sa->r_id.data);
914 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
916 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
918 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
920 if (sa->is_initiator)
922 sa->r_auth.method = a->auth_method;
923 vec_free (sa->r_auth.data);
924 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
928 sa->i_auth.method = a->auth_method;
929 vec_free (sa->i_auth.data);
930 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
933 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
935 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
936 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
938 sa->initial_contact = 1;
942 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
944 ikev2_parse_vendor_payload (ikep);
946 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
948 vec_free (first_child_sa->tsi);
949 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
951 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
953 vec_free (first_child_sa->tsr);
954 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
958 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
961 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
963 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
964 sa->unsupported_cp = payload;
969 payload = ikep->nextpayload;
974 vec_free (plaintext);
978 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
982 u8 payload = ike->nextpayload;
984 ike_payload_header_t *ikep;
987 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
988 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
989 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
991 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
994 goto cleanup_and_exit;
996 /* process encrypted payload */
998 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1000 ikep = (ike_payload_header_t *) & plaintext[p];
1001 plen = clib_net_to_host_u16 (ikep->length);
1003 if (plen < sizeof (ike_payload_header_t))
1004 goto cleanup_and_exit;
1006 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1008 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1009 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1010 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1013 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1015 sa->del = ikev2_parse_delete_payload (ikep);
1017 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1019 ikev2_parse_vendor_payload (ikep);
1023 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1025 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1027 sa->unsupported_cp = payload;
1032 payload = ikep->nextpayload;
1037 vec_free (plaintext);
1041 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1045 u8 payload = ike->nextpayload;
1048 u8 nonce[IKEV2_NONCE_SIZE];
1050 ike_payload_header_t *ikep;
1052 ikev2_notify_t *n = 0;
1053 ikev2_ts_t *tsi = 0;
1054 ikev2_ts_t *tsr = 0;
1055 ikev2_sa_proposal_t *proposal = 0;
1056 ikev2_child_sa_t *child_sa;
1058 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1059 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1060 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1062 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1065 goto cleanup_and_exit;
1067 /* process encrypted payload */
1069 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1071 ikep = (ike_payload_header_t *) & plaintext[p];
1072 plen = clib_net_to_host_u16 (ikep->length);
1074 if (plen < sizeof (ike_payload_header_t))
1075 goto cleanup_and_exit;
1077 else if (payload == IKEV2_PAYLOAD_SA)
1079 proposal = ikev2_parse_sa_payload (ikep);
1081 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1083 n = ikev2_parse_notify_payload (ikep);
1084 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1089 else if (payload == IKEV2_PAYLOAD_DELETE)
1091 sa->del = ikev2_parse_delete_payload (ikep);
1093 else if (payload == IKEV2_PAYLOAD_VENDOR)
1095 ikev2_parse_vendor_payload (ikep);
1097 else if (payload == IKEV2_PAYLOAD_NONCE)
1099 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1101 else if (payload == IKEV2_PAYLOAD_TSI)
1103 tsi = ikev2_parse_ts_payload (ikep);
1105 else if (payload == IKEV2_PAYLOAD_TSR)
1107 tsr = ikev2_parse_ts_payload (ikep);
1111 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1113 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1115 sa->unsupported_cp = payload;
1120 payload = ikep->nextpayload;
1124 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1126 ikev2_rekey_t *rekey = &sa->rekey[0];
1127 rekey->protocol_id = proposal->protocol_id;
1129 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1130 rekey->i_proposal->spi = rekey->spi;
1131 rekey->r_proposal = proposal;
1135 vec_free (sa->r_nonce);
1136 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1137 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1140 child_sa->rekey_retries = 0;
1145 ikev2_rekey_t *rekey;
1146 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1149 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1151 goto cleanup_and_exit;
1153 vec_add2 (sa->rekey, rekey, 1);
1154 rekey->protocol_id = n->protocol_id;
1155 rekey->spi = n->spi;
1156 rekey->i_proposal = proposal;
1158 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1162 vec_free (sa->i_nonce);
1163 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1164 /* generate new Nr */
1165 vec_free (sa->r_nonce);
1166 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1167 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1171 vec_free (plaintext);
1176 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1184 ikev2_sa_transform_t *tr_prf;
1187 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1193 nonce = sa->i_nonce;
1194 packet_data = sa->last_sa_init_res_packet_data;
1200 nonce = sa->r_nonce;
1201 packet_data = sa->last_sa_init_req_packet_data;
1204 data = vec_new (u8, 4);
1206 vec_append (data, id->data);
1208 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1209 vec_append (authmsg, packet_data);
1210 vec_append (authmsg, nonce);
1211 vec_append (authmsg, id_hash);
1219 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1221 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1222 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1223 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1224 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1231 ikev2_sa_match_ts (ikev2_sa_t * sa)
1233 ikev2_main_t *km = &ikev2_main;
1235 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1239 pool_foreach (p, km->profiles, ({
1241 if (sa->is_initiator)
1255 if (p->rem_id.type != id->type ||
1256 vec_len(p->rem_id.data) != vec_len(id->data) ||
1257 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1260 vec_foreach(ts, sa->childs[0].tsi)
1262 if (ikev2_ts_cmp(p_tsi, ts))
1264 vec_add1 (tsi, ts[0]);
1269 vec_foreach(ts, sa->childs[0].tsr)
1271 if (ikev2_ts_cmp(p_tsr, ts))
1273 vec_add1 (tsr, ts[0]);
1284 vec_free (sa->childs[0].tsi);
1285 vec_free (sa->childs[0].tsr);
1286 sa->childs[0].tsi = tsi;
1287 sa->childs[0].tsr = tsr;
1293 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1298 ikev2_sa_auth (ikev2_sa_t * sa)
1300 ikev2_main_t *km = &ikev2_main;
1301 ikev2_profile_t *p, *sel_p = 0;
1302 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1303 ikev2_sa_transform_t *tr_prf;
1306 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1308 /* only shared key and rsa signature */
1309 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1310 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1312 ikev2_elog_uint (IKEV2_LOG_ERROR,
1313 "unsupported authentication method %u",
1315 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1319 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1320 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1323 ikev2_auth_t *sa_auth;
1325 if (sa->is_initiator)
1328 sa_auth = &sa->r_auth;
1333 sa_auth = &sa->i_auth;
1337 pool_foreach (p, km->profiles, ({
1340 if (p->rem_id.type != sa_id->type ||
1341 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1342 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1345 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1347 if (!p->auth.data ||
1348 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1351 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1352 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1354 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1356 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1363 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1365 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1368 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1370 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1383 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1385 if (!sa->is_initiator)
1387 vec_free (sa->r_id.data);
1388 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1389 sa->r_id.type = sel_p->loc_id.type;
1391 /* generate our auth data */
1392 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1393 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1395 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1396 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1398 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1400 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1401 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1405 /* select transforms for 1st child sa */
1406 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1407 sa->childs[0].r_proposals =
1408 ikev2_select_proposal (sa->childs[0].i_proposals,
1409 IKEV2_PROTOCOL_ESP);
1414 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1415 "profile found! ispi %lx", sa->ispi);
1416 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1424 ikev2_sa_auth_init (ikev2_sa_t * sa)
1426 ikev2_main_t *km = &ikev2_main;
1427 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1428 ikev2_sa_transform_t *tr_prf;
1431 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1433 /* only shared key and rsa signature */
1434 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1435 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1437 ikev2_elog_uint (IKEV2_LOG_ERROR,
1438 "unsupported authentication method %u",
1440 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1444 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1445 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1446 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1447 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1450 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1452 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1453 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1455 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1457 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1458 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1468 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1470 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1474 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1476 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1485 ipsec_sa_flags_t flags;
1488 ipsec_crypto_alg_t encr_type;
1489 ipsec_integ_alg_t integ_type;
1490 ip46_address_t local_ip;
1491 ip46_address_t remote_ip;
1492 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1493 } ikev2_add_ipsec_tunnel_args_t;
1496 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1498 ikev2_main_t *km = &ikev2_main;
1503 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1504 &a->local_ip, &a->remote_ip, 0,
1505 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1506 TUNNEL_MODE_P2P, &sw_if_index);
1508 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1510 p = hash_get (km->sw_if_indices, sw_if_index);
1512 /* interface is managed by IKE; proceed with updating SAs */
1518 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1519 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1520 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1524 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1526 IPSEC_PROTOCOL_ESP, a->encr_type,
1527 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1528 a->flags, 0, a->salt_local, &a->local_ip,
1529 &a->remote_ip, NULL);
1530 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1531 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1532 a->integ_type, &a->rem_ikey,
1533 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1534 a->salt_remote, &a->remote_ip,
1535 &a->local_ip, NULL);
1538 vec_add1 (sas_in, a->remote_sa_id);
1539 rv |= ipsec_tun_protect_update (sw_if_index, a->local_sa_id, sas_in);
1540 hash_set1 (km->sw_if_indices, sw_if_index);
1544 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1547 ikev2_child_sa_t * child, u32 sa_index,
1550 ikev2_main_t *km = &ikev2_main;
1551 ipsec_crypto_alg_t encr_type;
1552 ipsec_integ_alg_t integ_type;
1553 ikev2_profile_t *p = 0;
1554 ikev2_sa_transform_t *tr;
1555 ikev2_sa_proposal_t *proposals;
1557 ikev2_add_ipsec_tunnel_args_t a;
1559 clib_memset (&a, 0, sizeof (a));
1561 if (!child->r_proposals)
1563 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1567 if (sa->is_initiator)
1569 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1570 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1571 proposals = child->i_proposals;
1572 a.local_spi = child->r_proposals[0].spi;
1573 a.remote_spi = child->i_proposals[0].spi;
1577 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1578 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1579 proposals = child->r_proposals;
1580 a.local_spi = child->i_proposals[0].spi;
1581 a.remote_spi = child->r_proposals[0].spi;
1584 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1586 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1587 if (tr && tr->esn_type)
1588 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1590 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1593 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1595 switch (tr->key_len)
1598 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1601 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1604 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1607 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1612 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1615 switch (tr->key_len)
1618 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1621 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1624 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1627 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1635 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1641 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1644 a.encr_type = encr_type;
1648 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1651 switch (tr->integ_type)
1653 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1654 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1656 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1657 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1659 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1660 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1662 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1663 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1666 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1672 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1678 integ_type = IPSEC_INTEG_ALG_NONE;
1681 a.integ_type = integ_type;
1682 ikev2_calc_child_keys (sa, child);
1684 if (sa->is_initiator)
1686 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1687 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1688 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1689 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1692 a.salt_remote = child->salt_er;
1693 a.salt_local = child->salt_ei;
1698 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1699 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1700 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1701 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1704 a.salt_remote = child->salt_ei;
1705 a.salt_local = child->salt_er;
1709 if (sa->is_profile_index_set)
1710 p = pool_elt_at_index (km->profiles, sa->profile_index);
1712 if (p && p->lifetime)
1714 child->time_to_expiration =
1715 vlib_time_now (vnm->vlib_main) + p->lifetime;
1716 if (p->lifetime_jitter)
1718 // This is not much better than rand(3), which Coverity warns
1719 // is unsuitable for security applications; random_u32 is
1720 // however fast. If this perturbance to the expiration time
1721 // needs to use a better RNG then we may need to use something
1722 // like /dev/urandom which has significant overhead.
1723 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1724 rnd = random_u32 (&rnd);
1726 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1730 if (thread_index & 0xffffffc0)
1731 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1733 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1734 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1736 child->local_sa_id =
1738 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1739 child->remote_sa_id =
1741 ikev2_mk_remote_sa_id (sa_index, child_index, thread_index);
1743 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1744 (u8 *) & a, sizeof (a));
1750 ip46_address_t local_ip;
1751 ip46_address_t remote_ip;
1754 } ikev2_del_ipsec_tunnel_args_t;
1757 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1759 ikev2_main_t *km = &ikev2_main;
1761 ipip_tunnel_key_t key = {
1763 .dst = a->remote_ip,
1764 .transport = IPIP_TRANSPORT_IP4,
1767 ipip_tunnel_t *ipip;
1770 ipip = ipip_tunnel_db_find (&key);
1774 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1775 ipsec_tun_protect_del (ipip->sw_if_index);
1776 ipsec_sa_unlock_id (a->remote_sa_id);
1777 ipsec_sa_unlock_id (a->local_sa_id);
1778 ipip_del_tunnel (ipip->sw_if_index);
1783 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1784 ikev2_child_sa_t * child)
1786 ikev2_del_ipsec_tunnel_args_t a;
1788 clib_memset (&a, 0, sizeof (a));
1790 if (sa->is_initiator)
1792 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1793 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1797 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1798 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1801 a.remote_sa_id = child->remote_sa_id;
1802 a.local_sa_id = child->local_sa_id;
1804 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1810 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1813 ike_payload_header_t *ph;
1817 ikev2_sa_transform_t *tr_encr, *tr_integ;
1819 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1821 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1823 ikev2_payload_chain_t *chain = 0;
1824 ikev2_payload_new_chain (chain);
1826 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1828 if (sa->r_proposals == 0)
1830 ikev2_payload_add_notify (chain,
1831 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1832 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1834 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1836 u8 *data = vec_new (u8, 2);
1837 ikev2_sa_transform_t *tr_dh;
1839 ikev2_sa_get_td_for_type (sa->r_proposals,
1840 IKEV2_TRANSFORM_TYPE_DH);
1841 ASSERT (tr_dh && tr_dh->dh_type);
1843 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1844 data[1] = (tr_dh->dh_type) & 0xff;
1846 ikev2_payload_add_notify (chain,
1847 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1850 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1852 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1854 u8 *data = vec_new (u8, 1);
1856 data[0] = sa->unsupported_cp;
1857 ikev2_payload_add_notify (chain,
1858 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1864 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1865 ikev2_payload_add_sa (chain, sa->r_proposals);
1866 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1867 ikev2_payload_add_nonce (chain, sa->r_nonce);
1870 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1872 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1874 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1875 ikev2_payload_add_auth (chain, &sa->r_auth);
1876 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1877 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1878 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1880 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1882 ikev2_payload_add_notify (chain,
1883 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1885 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1887 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1889 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1891 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1892 ikev2_payload_add_auth (chain, &sa->r_auth);
1894 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1896 ikev2_payload_add_notify (chain,
1897 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1898 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1899 ikev2_payload_add_auth (chain, &sa->r_auth);
1900 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1901 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1903 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1905 u8 *data = vec_new (u8, 1);
1907 data[0] = sa->unsupported_cp;
1908 ikev2_payload_add_notify (chain,
1909 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1913 else if (sa->state == IKEV2_STATE_SA_INIT)
1915 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1916 ikev2_payload_add_auth (chain, &sa->i_auth);
1917 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1918 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1919 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1923 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1927 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1929 /* if pending delete */
1932 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1934 if (sa->is_initiator)
1935 ikev2_payload_add_delete (chain, sa->del);
1937 /* The response to a request that deletes the IKE SA is an empty
1938 INFORMATIONAL response. */
1939 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1941 /* The response to a request that deletes ESP or AH SAs will contain
1942 delete payloads for the paired SAs going in the other direction. */
1945 ikev2_payload_add_delete (chain, sa->del);
1950 /* received N(AUTHENTICATION_FAILED) */
1951 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1953 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1956 /* received unsupported critical payload */
1957 else if (sa->unsupported_cp)
1959 u8 *data = vec_new (u8, 1);
1961 data[0] = sa->unsupported_cp;
1962 ikev2_payload_add_notify (chain,
1963 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1966 sa->unsupported_cp = 0;
1968 /* else send empty response */
1970 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1972 if (sa->is_initiator)
1975 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1976 ikev2_notify_t notify;
1977 u8 *data = vec_new (u8, 4);
1978 clib_memset (¬ify, 0, sizeof (notify));
1979 notify.protocol_id = IKEV2_PROTOCOL_ESP;
1980 notify.spi = sa->childs[0].i_proposals->spi;
1981 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1983 ikev2_payload_add_sa (chain, proposals);
1984 ikev2_payload_add_nonce (chain, sa->i_nonce);
1985 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1986 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1987 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1996 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1997 ikev2_payload_add_nonce (chain, sa->r_nonce);
1998 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2000 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2002 vec_del1 (sa->rekey, 0);
2004 else if (sa->unsupported_cp)
2006 u8 *data = vec_new (u8, 1);
2008 data[0] = sa->unsupported_cp;
2009 ikev2_payload_add_notify (chain,
2010 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2013 sa->unsupported_cp = 0;
2017 ikev2_payload_add_notify (chain,
2018 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2025 ike->version = IKE_VERSION_2;
2026 ike->nextpayload = IKEV2_PAYLOAD_SK;
2027 tlen = sizeof (*ike);
2028 if (sa->is_initiator)
2030 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2031 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2035 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2039 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2041 tlen += vec_len (chain->data);
2042 ike->nextpayload = chain->first_payload_type;
2043 ike->length = clib_host_to_net_u32 (tlen);
2044 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2046 /* store whole IKE payload - needed for PSK auth */
2047 vec_free (sa->last_sa_init_res_packet_data);
2048 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2053 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2056 plen = sizeof (*ph);
2057 ph = (ike_payload_header_t *) & ike->payload[0];
2058 ph->nextpayload = chain->first_payload_type;
2060 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2063 /* add space for hmac */
2064 plen += tr_integ->key_trunc;
2067 /* payload and total length */
2068 ph->length = clib_host_to_net_u16 (plen);
2069 ike->length = clib_host_to_net_u32 (tlen);
2071 /* calc integrity data for whole packet except hash itself */
2073 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2074 (u8 *) ike, tlen - tr_integ->key_trunc);
2076 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2077 sizeof (*ike), integ, tr_integ->key_trunc);
2079 /* store whole IKE payload - needed for retransmit */
2080 vec_free (sa->last_res_packet_data);
2081 vec_add (sa->last_res_packet_data, ike, tlen);
2085 ikev2_payload_destroy_chain (chain);
2091 ikev2_retransmit_sa_init (ike_header_t * ike,
2092 ip4_address_t iaddr, ip4_address_t raddr)
2094 ikev2_main_t *km = &ikev2_main;
2096 u32 thread_index = vlib_get_thread_index ();
2099 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2100 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2101 sa->iaddr.as_u32 == iaddr.as_u32 &&
2102 sa->raddr.as_u32 == raddr.as_u32)
2105 u32 len = clib_net_to_host_u32(ike->length);
2106 u8 payload = ike->nextpayload;
2108 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2109 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2110 u32 plen = clib_net_to_host_u16(ikep->length);
2112 if (plen < sizeof(ike_payload_header_t))
2115 if (payload == IKEV2_PAYLOAD_NONCE)
2117 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2119 /* req is retransmit */
2120 if (sa->state == IKEV2_STATE_SA_INIT)
2123 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2124 ike->ispi = tmp->ispi;
2125 ike->rspi = tmp->rspi;
2126 ike->nextpayload = tmp->nextpayload;
2127 ike->version = tmp->version;
2128 ike->exchange = tmp->exchange;
2129 ike->flags = tmp->flags;
2130 ike->msgid = tmp->msgid;
2131 ike->length = tmp->length;
2132 clib_memcpy_fast(ike->payload, tmp->payload,
2133 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2134 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2135 "ispi %lx IKE_SA_INIT retransmit "
2136 "from %d.%d.%d.%d to %d.%d.%d.%d",
2138 raddr.as_u32, iaddr.as_u32);
2141 /* else ignore req */
2144 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2145 "ispi %lx IKE_SA_INIT ignore "
2146 "from %d.%d.%d.%d to %d.%d.%d.%d",
2148 raddr.as_u32, iaddr.as_u32);
2153 payload = ikep->nextpayload;
2160 /* req is not retransmit */
2165 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2167 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2170 if (msg_id > sa->last_msg_id)
2172 sa->last_msg_id = msg_id;
2175 /* retransmitted req */
2176 else if (msg_id == sa->last_msg_id)
2179 tmp = (ike_header_t *) sa->last_res_packet_data;
2180 ike->ispi = tmp->ispi;
2181 ike->rspi = tmp->rspi;
2182 ike->nextpayload = tmp->nextpayload;
2183 ike->version = tmp->version;
2184 ike->exchange = tmp->exchange;
2185 ike->flags = tmp->flags;
2186 ike->msgid = tmp->msgid;
2187 ike->length = tmp->length;
2188 clib_memcpy_fast (ike->payload, tmp->payload,
2189 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2190 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2191 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2194 /* old req ignore */
2197 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2198 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2205 ikev2_node_fn (vlib_main_t * vm,
2206 vlib_node_runtime_t * node, vlib_frame_t * frame)
2208 u32 n_left_from, *from, *to_next;
2209 ikev2_next_t next_index;
2210 ikev2_main_t *km = &ikev2_main;
2211 u32 thread_index = vlib_get_thread_index ();
2213 from = vlib_frame_vector_args (frame);
2214 n_left_from = frame->n_vectors;
2215 next_index = node->cached_next_index;
2217 while (n_left_from > 0)
2221 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2223 while (n_left_from > 0 && n_left_to_next > 0)
2227 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2232 ikev2_sa_t *sa0 = 0;
2233 ikev2_sa_t sa; /* temporary store for SA */
2237 /* speculatively enqueue b0 to the current next frame */
2243 n_left_to_next -= 1;
2245 b0 = vlib_get_buffer (vm, bi0);
2246 ike0 = vlib_buffer_get_current (b0);
2247 vlib_buffer_advance (b0, -sizeof (*udp0));
2248 udp0 = vlib_buffer_get_current (b0);
2249 vlib_buffer_advance (b0, -sizeof (*ip40));
2250 ip40 = vlib_buffer_get_current (b0);
2252 if (ike0->version != IKE_VERSION_2)
2254 vlib_node_increment_counter (vm, ikev2_node.index,
2255 IKEV2_ERROR_NOT_IKEV2, 1);
2259 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2262 clib_memset (sa0, 0, sizeof (*sa0));
2264 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2266 if (ike0->rspi == 0)
2268 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2269 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2271 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2275 vlib_node_increment_counter (vm, ikev2_node.index,
2276 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2278 len = clib_net_to_host_u32 (ike0->length);
2283 vlib_node_increment_counter (vm, ikev2_node.index,
2284 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2289 ikev2_process_sa_init_req (vm, sa0, ike0);
2291 if (sa0->state == IKEV2_STATE_SA_INIT)
2293 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2295 ikev2_select_proposal (sa0->i_proposals,
2296 IKEV2_PROTOCOL_IKE);
2297 ikev2_generate_sa_init_data (sa0);
2300 if (sa0->state == IKEV2_STATE_SA_INIT
2301 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2303 len = ikev2_generate_message (sa0, ike0, 0);
2306 if (sa0->state == IKEV2_STATE_SA_INIT)
2308 /* add SA to the pool */
2309 pool_get (km->per_thread_data[thread_index].sas,
2311 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2313 per_thread_data[thread_index].sa_by_rspi,
2316 km->per_thread_data[thread_index].sas);
2320 ikev2_sa_free_all_vec (sa0);
2324 else //received sa_init without initiator flag
2326 ikev2_process_sa_init_resp (vm, sa0, ike0);
2328 if (sa0->state == IKEV2_STATE_SA_INIT)
2330 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2331 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2335 pool_elt_at_index (km->sais, p[0]);
2337 ikev2_complete_sa_data (sa0, sai);
2338 ikev2_calc_keys (sa0);
2339 ikev2_sa_auth_init (sa0);
2340 len = ikev2_generate_message (sa0, ike0, 0);
2344 if (sa0->state == IKEV2_STATE_SA_INIT)
2346 /* add SA to the pool */
2347 pool_get (km->per_thread_data[thread_index].sas, sa0);
2348 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2349 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2351 sa0 - km->per_thread_data[thread_index].sas);
2355 ikev2_sa_free_all_vec (sa0);
2359 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2362 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2363 clib_net_to_host_u64 (ike0->rspi));
2367 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2370 r = ikev2_retransmit_resp (sa0, ike0);
2373 vlib_node_increment_counter (vm, ikev2_node.index,
2374 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2376 len = clib_net_to_host_u32 (ike0->length);
2381 vlib_node_increment_counter (vm, ikev2_node.index,
2382 IKEV2_ERROR_IKE_REQ_IGNORE,
2387 ikev2_process_auth_req (vm, sa0, ike0);
2388 ikev2_sa_auth (sa0);
2389 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2391 ikev2_initial_contact_cleanup (sa0);
2392 ikev2_sa_match_ts (sa0);
2393 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2394 ikev2_create_tunnel_interface (km->vnet_main,
2400 if (sa0->is_initiator)
2402 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2406 pool_elt_at_index (km->sais, p[0]);
2407 hash_unset (km->sa_by_ispi, sai->ispi);
2408 ikev2_sa_free_all_vec (sai);
2409 pool_put (km->sais, sai);
2414 len = ikev2_generate_message (sa0, ike0, 0);
2418 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2421 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2422 clib_net_to_host_u64 (ike0->rspi));
2426 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2429 r = ikev2_retransmit_resp (sa0, ike0);
2432 vlib_node_increment_counter (vm, ikev2_node.index,
2433 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2435 len = clib_net_to_host_u32 (ike0->length);
2440 vlib_node_increment_counter (vm, ikev2_node.index,
2441 IKEV2_ERROR_IKE_REQ_IGNORE,
2446 ikev2_process_informational_req (vm, sa0, ike0);
2449 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2451 ikev2_delete_t *d, *tmp, *resp = 0;
2452 vec_foreach (d, sa0->del)
2454 ikev2_child_sa_t *ch_sa;
2455 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2457 !sa0->is_initiator);
2460 ikev2_delete_tunnel_interface (km->vnet_main,
2462 if (!sa0->is_initiator)
2464 vec_add2 (resp, tmp, 1);
2465 tmp->protocol_id = d->protocol_id;
2466 tmp->spi = ch_sa->r_proposals[0].spi;
2468 ikev2_sa_del_child_sa (sa0, ch_sa);
2471 if (!sa0->is_initiator)
2473 vec_free (sa0->del);
2478 if (!sa0->is_initiator)
2480 len = ikev2_generate_message (sa0, ike0, 0);
2484 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2487 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2488 clib_net_to_host_u64 (ike0->rspi));
2492 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2495 r = ikev2_retransmit_resp (sa0, ike0);
2498 vlib_node_increment_counter (vm, ikev2_node.index,
2499 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2501 len = clib_net_to_host_u32 (ike0->length);
2506 vlib_node_increment_counter (vm, ikev2_node.index,
2507 IKEV2_ERROR_IKE_REQ_IGNORE,
2512 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2515 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2518 vec_free (sa0->childs);
2519 ikev2_child_sa_t *child;
2520 vec_add2 (sa0->childs, child, 1);
2521 child->r_proposals = sa0->rekey[0].r_proposal;
2522 child->i_proposals = sa0->rekey[0].i_proposal;
2523 child->tsi = sa0->rekey[0].tsi;
2524 child->tsr = sa0->rekey[0].tsr;
2525 ikev2_create_tunnel_interface (km->vnet_main,
2528 child - sa0->childs);
2530 if (sa0->is_initiator)
2532 vec_del1 (sa0->rekey, 0);
2536 len = ikev2_generate_message (sa0, ike0, 0);
2543 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2544 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2546 ip40->src_address.as_u32,
2547 ip40->dst_address.as_u32);
2551 /* if we are sending packet back, rewrite headers */
2554 next0 = IKEV2_NEXT_IP4_LOOKUP;
2555 if (sa0->is_initiator)
2557 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2558 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2562 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2563 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2566 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2568 b0->current_length =
2569 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2570 ip40->length = clib_host_to_net_u16 (b0->current_length);
2571 ip40->checksum = ip4_header_checksum (ip40);
2574 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2575 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2577 ikev2_child_sa_t *c;
2579 vec_foreach (c, sa0->childs)
2580 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2582 ikev2_delete_sa (sa0);
2584 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2586 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2587 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2589 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2590 t->sw_if_index = sw_if_index0;
2591 t->next_index = next0;
2594 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2595 n_left_to_next, bi0, next0);
2598 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2601 vlib_node_increment_counter (vm, ikev2_node.index,
2602 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2603 return frame->n_vectors;
2607 VLIB_REGISTER_NODE (ikev2_node,static) = {
2608 .function = ikev2_node_fn,
2610 .vector_size = sizeof (u32),
2611 .format_trace = format_ikev2_trace,
2612 .type = VLIB_NODE_TYPE_INTERNAL,
2614 .n_errors = ARRAY_LEN(ikev2_error_strings),
2615 .error_strings = ikev2_error_strings,
2617 .n_next_nodes = IKEV2_N_NEXT,
2620 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2621 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2626 // set ikev2 proposals when vpp is used as initiator
2627 static clib_error_t *
2628 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2629 ikev2_transforms_set * ts,
2630 ikev2_sa_proposal_t ** proposals, int is_ike)
2633 ikev2_main_t *km = &ikev2_main;
2634 ikev2_sa_proposal_t *proposal;
2635 vec_add2 (*proposals, proposal, 1);
2636 ikev2_sa_transform_t *td;
2641 vec_foreach (td, km->supported_transforms)
2643 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2644 && td->encr_type == ts->crypto_alg
2645 && td->key_len == ts->crypto_key_size / 8)
2648 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2649 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2650 vec_add (td->attrs, (u8 *) attr, 4);
2651 vec_add1 (proposal->transforms, *td);
2660 r = clib_error_return (0, "Unsupported algorithm");
2666 vec_foreach (td, km->supported_transforms)
2668 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2669 && td->integ_type == ts->integ_alg)
2671 vec_add1 (proposal->transforms, *td);
2679 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2680 r = clib_error_return (0, "Unsupported algorithm");
2688 vec_foreach (td, km->supported_transforms)
2690 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2691 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2693 vec_add1 (proposal->transforms, *td);
2700 r = clib_error_return (0, "Unsupported algorithm");
2706 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2709 vec_foreach (td, km->supported_transforms)
2711 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2713 vec_add1 (proposal->transforms, *td);
2716 sa->dh_group = td->dh_type;
2724 r = clib_error_return (0, "Unsupported algorithm");
2732 vec_foreach (td, km->supported_transforms)
2734 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2736 vec_add1 (proposal->transforms, *td);
2743 r = clib_error_return (0, "Unsupported algorithm");
2752 static ikev2_profile_t *
2753 ikev2_profile_index_by_name (u8 * name)
2755 ikev2_main_t *km = &ikev2_main;
2758 p = mhash_get (&km->profile_index_by_name, name);
2762 return pool_elt_at_index (km->profiles, p[0]);
2767 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2776 b0 = vlib_get_buffer (vm, bi0);
2777 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2778 udp0 = vlib_buffer_get_current (b0);
2779 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2780 ip40 = vlib_buffer_get_current (b0);
2783 ip40->ip_version_and_header_length = 0x45;
2785 ip40->fragment_id = 0;
2786 ip40->flags_and_fragment_offset = 0;
2788 ip40->protocol = IP_PROTOCOL_UDP;
2789 ip40->dst_address.as_u32 = dst->as_u32;
2790 ip40->src_address.as_u32 = src->as_u32;
2791 udp0->dst_port = clib_host_to_net_u16 (500);
2792 udp0->src_port = clib_host_to_net_u16 (500);
2793 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2795 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2796 ip40->length = clib_host_to_net_u16 (b0->current_length);
2797 ip40->checksum = ip4_header_checksum (ip40);
2800 /* send the request */
2801 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2802 to_next = vlib_frame_vector_args (f);
2805 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2810 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2813 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2818 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2819 *ike = vlib_buffer_get_current (b0);
2824 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2826 ikev2_main_t *km = &ikev2_main;
2828 km->pkey = ikev2_load_key_file (file);
2829 if (km->pkey == NULL)
2830 return clib_error_return (0, "load key '%s' failed", file);
2836 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2838 ikev2_main_t *km = &ikev2_main;
2843 if (ikev2_profile_index_by_name (name))
2844 return clib_error_return (0, "policy %v already exists", name);
2846 pool_get (km->profiles, p);
2847 clib_memset (p, 0, sizeof (*p));
2848 p->name = vec_dup (name);
2849 p->responder.sw_if_index = ~0;
2850 uword index = p - km->profiles;
2851 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2855 p = ikev2_profile_index_by_name (name);
2857 return clib_error_return (0, "policy %v does not exists", name);
2860 pool_put (km->profiles, p);
2861 mhash_unset (&km->profile_index_by_name, name, 0);
2867 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2868 u8 * auth_data, u8 data_hex_format)
2873 p = ikev2_profile_index_by_name (name);
2877 r = clib_error_return (0, "unknown profile %v", name);
2880 vec_free (p->auth.data);
2881 p->auth.method = auth_method;
2882 p->auth.data = vec_dup (auth_data);
2883 p->auth.hex = data_hex_format;
2885 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2887 vec_add1 (p->auth.data, 0);
2889 EVP_PKEY_free (p->auth.key);
2890 p->auth.key = ikev2_load_cert_file (auth_data);
2891 if (p->auth.key == NULL)
2892 return clib_error_return (0, "load cert '%s' failed", auth_data);
2899 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2905 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2906 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2908 r = clib_error_return (0, "unsupported identity type %U",
2909 format_ikev2_id_type, id_type);
2913 p = ikev2_profile_index_by_name (name);
2917 r = clib_error_return (0, "unknown profile %v", name);
2923 vec_free (p->loc_id.data);
2924 p->loc_id.type = id_type;
2925 p->loc_id.data = vec_dup (data);
2929 vec_free (p->rem_id.data);
2930 p->rem_id.type = id_type;
2931 p->rem_id.data = vec_dup (data);
2938 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2939 u16 start_port, u16 end_port, ip4_address_t start_addr,
2940 ip4_address_t end_addr, int is_local)
2945 p = ikev2_profile_index_by_name (name);
2949 r = clib_error_return (0, "unknown profile %v", name);
2955 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2956 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2957 p->loc_ts.start_port = start_port;
2958 p->loc_ts.end_port = end_port;
2959 p->loc_ts.protocol_id = protocol_id;
2960 p->loc_ts.ts_type = 7;
2964 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2965 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2966 p->rem_ts.start_port = start_port;
2967 p->rem_ts.end_port = end_port;
2968 p->rem_ts.protocol_id = protocol_id;
2969 p->rem_ts.ts_type = 7;
2977 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2978 u32 sw_if_index, ip4_address_t ip4)
2983 p = ikev2_profile_index_by_name (name);
2987 r = clib_error_return (0, "unknown profile %v", name);
2991 p->responder.sw_if_index = sw_if_index;
2992 p->responder.ip4 = ip4;
2998 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
2999 ikev2_transform_encr_type_t crypto_alg,
3000 ikev2_transform_integ_type_t integ_alg,
3001 ikev2_transform_dh_type_t dh_type,
3002 u32 crypto_key_size)
3007 p = ikev2_profile_index_by_name (name);
3011 r = clib_error_return (0, "unknown profile %v", name);
3015 p->ike_ts.crypto_alg = crypto_alg;
3016 p->ike_ts.integ_alg = integ_alg;
3017 p->ike_ts.dh_type = dh_type;
3018 p->ike_ts.crypto_key_size = crypto_key_size;
3023 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3024 ikev2_transform_encr_type_t crypto_alg,
3025 ikev2_transform_integ_type_t integ_alg,
3026 ikev2_transform_dh_type_t dh_type,
3027 u32 crypto_key_size)
3032 p = ikev2_profile_index_by_name (name);
3036 r = clib_error_return (0, "unknown profile %v", name);
3040 p->esp_ts.crypto_alg = crypto_alg;
3041 p->esp_ts.integ_alg = integ_alg;
3042 p->esp_ts.dh_type = dh_type;
3043 p->esp_ts.crypto_key_size = crypto_key_size;
3048 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3049 u64 lifetime, u32 jitter, u32 handover,
3055 p = ikev2_profile_index_by_name (name);
3059 r = clib_error_return (0, "unknown profile %v", name);
3063 p->lifetime = lifetime;
3064 p->lifetime_jitter = jitter;
3065 p->handover = handover;
3066 p->lifetime_maxdata = maxdata;
3071 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3075 ip4_main_t *im = &ip4_main;
3076 ikev2_main_t *km = &ikev2_main;
3078 p = ikev2_profile_index_by_name (name);
3082 r = clib_error_return (0, "unknown profile %v", name);
3086 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3088 r = clib_error_return (0, "responder not set for profile %v", name);
3093 /* Create the Initiator Request */
3097 ip_lookup_main_t *lm = &im->lookup_main;
3099 int len = sizeof (ike_header_t);
3101 /* Get own iface IP */
3103 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3104 ip_interface_address_t *if_add =
3105 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3106 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3108 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3110 /* Prepare the SA and the IKE payload */
3112 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3113 ikev2_payload_chain_t *chain = 0;
3114 ikev2_payload_new_chain (chain);
3116 /* Build the IKE proposal payload */
3117 ikev2_sa_proposal_t *proposals = 0;
3118 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3119 proposals[0].proposal_num = 1;
3120 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3122 /* Add and then cleanup proposal data */
3123 ikev2_payload_add_sa (chain, proposals);
3124 ikev2_sa_free_proposal_vector (&proposals);
3126 sa.is_initiator = 1;
3127 sa.profile_index = km->profiles - p;
3128 sa.is_profile_index_set = 1;
3129 sa.state = IKEV2_STATE_SA_INIT;
3130 ikev2_generate_sa_init_data (&sa);
3131 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3132 ikev2_payload_add_nonce (chain, sa.i_nonce);
3134 /* Build the child SA proposal */
3135 vec_resize (sa.childs, 1);
3136 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3137 &sa.childs[0].i_proposals, 0);
3138 sa.childs[0].i_proposals[0].proposal_num = 1;
3139 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3140 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3141 sizeof (sa.childs[0].i_proposals[0].spi));
3145 /* Add NAT detection notification messages (mandatory) */
3146 u8 nat_detection_source[8 + 8 + 4 + 2];
3147 u8 *nat_detection_sha1 = vec_new (u8, 20);
3149 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3150 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3151 tmpspi = clib_host_to_net_u64 (sa.rspi);
3152 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3153 u16 tmpport = clib_host_to_net_u16 (500);
3154 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3156 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3157 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3158 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3159 nat_detection_sha1);
3160 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3161 nat_detection_sha1);
3162 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3163 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3164 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3165 nat_detection_sha1);
3166 ikev2_payload_add_notify (chain,
3167 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3168 nat_detection_sha1);
3169 vec_free (nat_detection_sha1);
3171 u8 *sig_hash_algo = vec_new (u8, 8);
3172 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3173 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3174 ikev2_payload_add_notify (chain,
3175 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3177 vec_free (sig_hash_algo);
3180 /* Buffer update and boilerplate */
3181 len += vec_len (chain->data);
3182 ike0->nextpayload = chain->first_payload_type;
3183 ike0->length = clib_host_to_net_u32 (len);
3184 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3185 ikev2_payload_destroy_chain (chain);
3187 ike0->version = IKE_VERSION_2;
3188 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3189 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3190 ike0->ispi = sa.ispi;
3194 /* store whole IKE payload - needed for PSK auth */
3195 vec_free (sa.last_sa_init_req_packet_data);
3196 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3198 /* add data to the SA then add it to the pool */
3199 sa.iaddr.as_u32 = if_ip->as_u32;
3200 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3201 sa.i_id.type = p->loc_id.type;
3202 sa.i_id.data = vec_dup (p->loc_id.data);
3203 sa.i_auth.method = p->auth.method;
3204 sa.i_auth.hex = p->auth.hex;
3205 sa.i_auth.data = vec_dup (p->auth.data);
3206 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3207 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3209 /* add SA to the pool */
3210 ikev2_sa_t *sa0 = 0;
3211 pool_get (km->sais, sa0);
3212 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3213 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3215 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3217 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3218 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3219 p->responder.ip4.as_u32);
3226 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3227 ikev2_child_sa_t * csa)
3229 /* Create the Initiator notification for child SA removal */
3230 ikev2_main_t *km = &ikev2_main;
3235 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3238 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3239 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3240 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3241 vec_resize (sa->del, 1);
3242 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3243 sa->del->spi = csa->i_proposals->spi;
3244 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3245 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3246 len = ikev2_generate_message (sa, ike0, 0);
3248 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3250 /* delete local child SA */
3251 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3252 ikev2_sa_del_child_sa (sa, csa);
3256 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3259 ikev2_main_t *km = &ikev2_main;
3260 ikev2_main_per_thread_data_t *tkm;
3261 ikev2_sa_t *fsa = 0;
3262 ikev2_child_sa_t *fchild = 0;
3264 /* Search for the child SA */
3265 vec_foreach (tkm, km->per_thread_data)
3271 pool_foreach (sa, tkm->sas, ({
3272 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3282 if (!fchild || !fsa)
3284 r = clib_error_return (0, "Child SA not found");
3289 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3296 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3299 ikev2_main_t *km = &ikev2_main;
3300 ikev2_main_per_thread_data_t *tkm;
3301 ikev2_sa_t *fsa = 0;
3302 ikev2_main_per_thread_data_t *ftkm = 0;
3304 /* Search for the IKE SA */
3305 vec_foreach (tkm, km->per_thread_data)
3311 pool_foreach (sa, tkm->sas, ({
3312 if (sa->ispi == ispi)
3324 r = clib_error_return (0, "IKE SA not found");
3329 /* Create the Initiator notification for IKE SA removal */
3335 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3338 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3339 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3340 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3341 vec_resize (fsa->del, 1);
3342 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3343 fsa->del->spi = ispi;
3344 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3345 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3346 len = ikev2_generate_message (fsa, ike0, 0);
3348 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3352 /* delete local SA */
3353 ikev2_child_sa_t *c;
3354 vec_foreach (c, fsa->childs)
3356 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3357 ikev2_sa_del_child_sa (fsa, c);
3359 ikev2_sa_free_all_vec (fsa);
3360 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3363 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3364 pool_put (ftkm->sas, fsa);
3372 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3373 ikev2_child_sa_t * csa)
3375 /* Create the Initiator request for create child SA */
3381 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3384 ike0->version = IKE_VERSION_2;
3385 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3386 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3387 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3388 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3389 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3390 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3392 ikev2_rekey_t *rekey;
3393 vec_add2 (sa->rekey, rekey, 1);
3394 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3397 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3398 rekey->spi = proposals[0].spi;
3399 rekey->ispi = csa->i_proposals->spi;
3400 len = ikev2_generate_message (sa, ike0, proposals);
3401 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3402 vec_free (proposals);
3406 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3409 ikev2_main_t *km = &ikev2_main;
3410 ikev2_main_per_thread_data_t *tkm;
3411 ikev2_sa_t *fsa = 0;
3412 ikev2_child_sa_t *fchild = 0;
3414 /* Search for the child SA */
3415 vec_foreach (tkm, km->per_thread_data)
3421 pool_foreach (sa, tkm->sas, ({
3422 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3432 if (!fchild || !fsa)
3434 r = clib_error_return (0, "Child SA not found");
3439 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3446 ikev2_init (vlib_main_t * vm)
3448 ikev2_main_t *km = &ikev2_main;
3449 vlib_thread_main_t *tm = vlib_get_thread_main ();
3452 clib_memset (km, 0, sizeof (ikev2_main_t));
3453 km->vnet_main = vnet_get_main ();
3456 ikev2_crypto_init (km);
3458 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3460 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3461 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3463 km->per_thread_data[thread_id].sa_by_rspi =
3464 hash_create (0, sizeof (uword));
3467 km->sa_by_ispi = hash_create (0, sizeof (uword));
3468 km->sw_if_indices = hash_create (0, 0);
3470 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3472 ikev2_cli_reference ();
3478 VLIB_INIT_FUNCTION (ikev2_init) =
3480 .runs_after = VLIB_INITS("ipsec_init"),
3486 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3488 ikev2_main_t *km = &ikev2_main;
3489 ikev2_profile_t *p = 0;
3490 vlib_main_t *vm = km->vlib_main;
3491 f64 now = vlib_time_now (vm);
3494 if (sa->is_profile_index_set)
3495 p = pool_elt_at_index (km->profiles, sa->profile_index);
3497 if (sa->is_initiator && p && csa->time_to_expiration
3498 && now > csa->time_to_expiration)
3500 if (!csa->is_expired || csa->rekey_retries > 0)
3502 ikev2_rekey_child_sa_internal (vm, sa, csa);
3503 csa->time_to_expiration = now + p->handover;
3504 csa->is_expired = 1;
3505 if (csa->rekey_retries == 0)
3507 csa->rekey_retries = 5;
3509 else if (csa->rekey_retries > 0)
3511 csa->rekey_retries--;
3512 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3513 csa->i_proposals->spi, csa->rekey_retries);
3514 if (csa->rekey_retries == 0)
3516 csa->rekey_retries = -1;
3523 csa->time_to_expiration = 0;
3524 ikev2_delete_child_sa_internal (vm, sa, csa);
3533 ikev2_set_log_level (ikev2_log_level_t log_level)
3535 ikev2_main_t *km = &ikev2_main;
3537 if (log_level >= IKEV2_LOG_MAX)
3539 ikev2_log_error ("unknown logging level %d", log_level);
3543 km->log_level = log_level;
3548 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3550 ikev2_main_t *km = &ikev2_main;
3551 vlib_main_t *vm = km->vlib_main;
3552 ikev2_main_per_thread_data_t *tkm;
3553 ikev2_sa_t *fsa = 0;
3554 ikev2_profile_t *p = 0;
3555 ikev2_child_sa_t *fchild = 0;
3556 f64 now = vlib_time_now (vm);
3557 vlib_counter_t counts;
3559 /* Search for the SA and child SA */
3560 vec_foreach (tkm, km->per_thread_data)
3566 pool_foreach (sa, tkm->sas, ({
3567 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3576 vlib_get_combined_counter (&ipsec_sa_counters,
3577 ipsec_sa->stat_index, &counts);
3579 if (fsa && fsa->is_profile_index_set)
3580 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3582 if (fchild && p && p->lifetime_maxdata)
3584 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3586 fchild->time_to_expiration = now;
3591 static vlib_node_registration_t ikev2_mngr_process_node;
3594 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3597 ikev2_main_t *km = &ikev2_main;
3598 ipsec_main_t *im = &ipsec_main;
3603 vlib_process_wait_for_event_or_clock (vm, 1);
3604 vlib_process_get_events (vm, NULL);
3606 /* process ike child sas */
3607 ikev2_main_per_thread_data_t *tkm;
3608 vec_foreach (tkm, km->per_thread_data)
3612 pool_foreach (sa, tkm->sas, ({
3613 ikev2_child_sa_t *c;
3614 vec_foreach (c, sa->childs)
3616 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3622 /* process ipsec sas */
3625 pool_foreach (sa, im->sad, ({
3626 ikev2_mngr_process_ipsec_sa(sa);
3632 vlib_process_wait_for_event_or_clock (vm, 5);
3633 vlib_process_get_events (vm, NULL);
3642 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3643 .function = ikev2_mngr_process_fn,
3644 .type = VLIB_NODE_TYPE_PROCESS,
3646 "ikev2-manager-process",
3649 VLIB_PLUGIN_REGISTER () = {
3650 .version = VPP_BUILD_VER,
3651 .description = "Internet Key Exchange (IKEv2) Protocol",
3656 * fd.io coding-style-patch-verification: ON
3659 * eval: (c-set-style "gnu")