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>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received")
77 #define _(sym,str) IKEV2_ERROR_##sym,
83 static char *ikev2_error_strings[] = {
84 #define _(sym,string) string,
91 IKEV2_NEXT_IP4_LOOKUP,
92 IKEV2_NEXT_ERROR_DROP,
96 typedef u32 ikev2_non_esp_marker;
98 static_always_inline u16
99 ikev2_get_port (ikev2_sa_t * sa)
101 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
104 static_always_inline int
105 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
107 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
108 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
109 return len + sizeof (ikev2_non_esp_marker);
112 static ikev2_sa_transform_t *
113 ikev2_find_transform_data (ikev2_sa_transform_t * t)
115 ikev2_main_t *km = &ikev2_main;
116 ikev2_sa_transform_t *td;
118 vec_foreach (td, km->supported_transforms)
120 if (td->type != t->type)
123 if (td->transform_id != t->transform_id)
126 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
128 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
129 || t->attrs[1] != 14)
132 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
140 static ikev2_sa_proposal_t *
141 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
142 ikev2_protocol_id_t prot_id)
144 ikev2_sa_proposal_t *rv = 0;
145 ikev2_sa_proposal_t *proposal;
146 ikev2_sa_transform_t *transform, *new_t;
147 u8 mandatory_bitmap, optional_bitmap;
149 if (prot_id == IKEV2_PROTOCOL_IKE)
151 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
152 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
153 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
154 optional_bitmap = mandatory_bitmap;
156 else if (prot_id == IKEV2_PROTOCOL_ESP)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_ESN);
160 optional_bitmap = mandatory_bitmap |
161 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
163 else if (prot_id == IKEV2_PROTOCOL_AH)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
166 (1 << IKEV2_TRANSFORM_TYPE_ESN);
167 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
172 vec_add2 (rv, proposal, 1);
174 vec_foreach (proposal, proposals)
177 if (proposal->protocol_id != prot_id)
180 vec_foreach (transform, proposal->transforms)
182 if ((1 << transform->type) & bitmap)
185 if (ikev2_find_transform_data (transform))
187 bitmap |= 1 << transform->type;
188 vec_add2 (rv->transforms, new_t, 1);
189 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
190 new_t->attrs = vec_dup (transform->attrs);
194 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
195 (bitmap & ~optional_bitmap) == 0)
197 rv->proposal_num = proposal->proposal_num;
198 rv->protocol_id = proposal->protocol_id;
199 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
204 vec_free (rv->transforms);
213 ikev2_sa_transform_t *
214 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
215 ikev2_transform_type_t type)
217 ikev2_sa_transform_t *t;
222 vec_foreach (t, p->transforms)
225 return ikev2_find_transform_data (t);
231 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
235 vec_foreach (c, sa->childs)
237 ikev2_sa_proposal_t *proposal =
238 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
239 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
247 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
249 ikev2_sa_proposal_t *p;
250 ikev2_sa_transform_t *t;
257 vec_foreach (t, p->transforms)
261 vec_free (p->transforms);
267 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
269 ikev2_sa_free_proposal_vector (&c->r_proposals);
270 ikev2_sa_free_proposal_vector (&c->i_proposals);
280 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
283 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
289 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
291 ikev2_sa_free_child_sa (child);
292 vec_del1 (sa->childs, child - sa->childs);
296 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
298 vec_free (sa->i_nonce);
299 vec_free (sa->i_dh_data);
300 vec_free (sa->dh_shared_key);
301 vec_free (sa->dh_private_key);
303 ikev2_sa_free_proposal_vector (&sa->r_proposals);
304 ikev2_sa_free_proposal_vector (&sa->i_proposals);
307 vec_free (sa->sk_ai);
308 vec_free (sa->sk_ar);
309 vec_free (sa->sk_ei);
310 vec_free (sa->sk_er);
311 vec_free (sa->sk_pi);
312 vec_free (sa->sk_pr);
314 vec_free (sa->i_id.data);
315 vec_free (sa->i_auth.data);
316 vec_free (sa->r_id.data);
317 vec_free (sa->r_auth.data);
319 EVP_PKEY_free (sa->r_auth.key);
323 ikev2_sa_free_all_child_sa (&sa->childs);
327 ikev2_delete_sa (ikev2_sa_t * sa)
329 ikev2_main_t *km = &ikev2_main;
330 u32 thread_index = vlib_get_thread_index ();
333 ikev2_sa_free_all_vec (sa);
335 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
338 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
339 pool_put (km->per_thread_data[thread_index].sas, sa);
344 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
346 ikev2_sa_transform_t *t = 0, *t2;
347 ikev2_main_t *km = &ikev2_main;
349 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
354 /* check if received DH group is on our list of supported groups */
355 vec_foreach (t2, km->supported_transforms)
357 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
366 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
370 if (sa->is_initiator)
373 RAND_bytes ((u8 *) & sa->ispi, 8);
376 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
377 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
382 RAND_bytes ((u8 *) & sa->rspi, 8);
385 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
386 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
389 /* generate dh keys */
390 ikev2_generate_dh (sa, t);
395 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
397 ikev2_sa_transform_t *t = 0, *t2;
398 ikev2_main_t *km = &ikev2_main;
400 /*move some data to the new SA */
401 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
402 sa->i_nonce = _(sai->i_nonce);
403 sa->i_dh_data = _(sai->i_dh_data);
404 sa->dh_private_key = _(sai->dh_private_key);
405 sa->iaddr.as_u32 = sai->iaddr.as_u32;
406 sa->raddr.as_u32 = sai->raddr.as_u32;
407 sa->is_initiator = sai->is_initiator;
408 sa->i_id.type = sai->i_id.type;
409 sa->profile_index = sai->profile_index;
410 sa->is_profile_index_set = sai->is_profile_index_set;
411 sa->tun_itf = sai->tun_itf;
412 sa->is_tun_itf_set = sai->is_tun_itf_set;
413 sa->i_id.data = _(sai->i_id.data);
414 sa->i_auth.method = sai->i_auth.method;
415 sa->i_auth.hex = sai->i_auth.hex;
416 sa->i_auth.data = _(sai->i_auth.data);
417 sa->i_auth.key = _(sai->i_auth.key);
418 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
419 sa->childs = _(sai->childs);
420 sa->udp_encap = sai->udp_encap;
421 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
422 sa->dst_port = sai->dst_port;
423 sa->sw_if_index = sai->sw_if_index;
427 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
432 /* check if received DH group is on our list of supported groups */
433 vec_foreach (t2, km->supported_transforms)
435 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
444 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
449 /* generate dh keys */
450 ikev2_complete_dh (sa, t);
455 ikev2_calc_keys (ikev2_sa_t * sa)
458 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
461 u16 integ_key_len = 0;
462 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
464 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
466 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
468 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
471 integ_key_len = tr_integ->key_len;
473 vec_append (s, sa->i_nonce);
474 vec_append (s, sa->r_nonce);
475 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
477 /* Calculate S = Ni | Nr | SPIi | SPIr */
479 vec_add2 (s, tmp, 2 * sizeof (*spi));
481 spi[0] = clib_host_to_net_u64 (sa->ispi);
482 spi[1] = clib_host_to_net_u64 (sa->rspi);
484 /* calculate PRFplus */
486 int len = tr_prf->key_trunc + /* SK_d */
487 integ_key_len * 2 + /* SK_ai, SK_ar */
488 tr_encr->key_len * 2 + /* SK_ei, SK_er */
489 tr_prf->key_len * 2; /* SK_pi, SK_pr */
491 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
498 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
499 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
500 pos += tr_prf->key_trunc;
505 sa->sk_ai = vec_new (u8, integ_key_len);
506 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
507 pos += integ_key_len;
510 sa->sk_ar = vec_new (u8, integ_key_len);
511 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
512 pos += integ_key_len;
516 sa->sk_ei = vec_new (u8, tr_encr->key_len);
517 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
518 pos += tr_encr->key_len;
521 sa->sk_er = vec_new (u8, tr_encr->key_len);
522 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
523 pos += tr_encr->key_len;
526 sa->sk_pi = vec_new (u8, tr_prf->key_len);
527 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
528 pos += tr_prf->key_len;
531 sa->sk_pr = vec_new (u8, tr_prf->key_len);
532 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
533 pos += tr_prf->key_len;
539 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
542 u16 integ_key_len = 0;
545 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
547 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
549 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
551 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
554 integ_key_len = ctr_integ->key_len;
556 salt_len = sizeof (u32);
558 vec_append (s, sa->i_nonce);
559 vec_append (s, sa->r_nonce);
560 /* calculate PRFplus */
562 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
564 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
569 child->sk_ei = vec_new (u8, ctr_encr->key_len);
570 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
571 pos += ctr_encr->key_len;
576 child->sk_ai = vec_new (u8, ctr_integ->key_len);
577 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
578 pos += ctr_integ->key_len;
582 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
587 child->sk_er = vec_new (u8, ctr_encr->key_len);
588 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
589 pos += ctr_encr->key_len;
594 child->sk_ar = vec_new (u8, integ_key_len);
595 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
596 pos += integ_key_len;
600 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
609 static_always_inline u8 *
610 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
612 /* ispi, rspi, ip, port */
613 u8 buf[8 + 8 + 4 + 2];
614 u8 *res = vec_new (u8, 20);
616 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
617 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
618 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
619 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
620 SHA1 (buf, sizeof (buf), res);
625 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
626 ike_header_t * ike, udp_header_t * udp)
629 u32 len = clib_net_to_host_u32 (ike->length);
630 u8 payload = ike->nextpayload;
632 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
634 clib_net_to_host_u64 (ike->ispi),
635 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
637 sa->ispi = clib_net_to_host_u64 (ike->ispi);
639 /* store whole IKE payload - needed for PSK auth */
640 vec_free (sa->last_sa_init_req_packet_data);
641 vec_add (sa->last_sa_init_req_packet_data, ike, len);
643 while (p < len && payload != IKEV2_PAYLOAD_NONE)
645 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
646 u32 plen = clib_net_to_host_u16 (ikep->length);
648 if (plen < sizeof (ike_payload_header_t))
651 if (payload == IKEV2_PAYLOAD_SA)
653 ikev2_sa_free_proposal_vector (&sa->i_proposals);
654 sa->i_proposals = ikev2_parse_sa_payload (ikep);
656 else if (payload == IKEV2_PAYLOAD_KE)
658 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
659 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
660 vec_free (sa->i_dh_data);
661 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
663 else if (payload == IKEV2_PAYLOAD_NONCE)
665 vec_free (sa->i_nonce);
666 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
668 else if (payload == IKEV2_PAYLOAD_NOTIFY)
670 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
671 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
674 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
675 clib_net_to_host_u32 (sa->
678 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
681 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
682 " behind NAT", sa->ispi);
686 else if (n->msg_type ==
687 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
690 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
691 clib_net_to_host_u32 (sa->
694 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
697 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
698 " (self) behind NAT", sa->ispi);
704 else if (payload == IKEV2_PAYLOAD_VENDOR)
706 ikev2_parse_vendor_payload (ikep);
710 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
712 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
714 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
715 sa->unsupported_cp = payload;
720 payload = ikep->nextpayload;
724 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
728 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
729 ike_header_t * ike, udp_header_t * udp)
732 u32 len = clib_net_to_host_u32 (ike->length);
733 u8 payload = ike->nextpayload;
735 sa->ispi = clib_net_to_host_u64 (ike->ispi);
736 sa->rspi = clib_net_to_host_u64 (ike->rspi);
738 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
739 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
742 /* store whole IKE payload - needed for PSK auth */
743 vec_free (sa->last_sa_init_res_packet_data);
744 vec_add (sa->last_sa_init_res_packet_data, ike, len);
746 while (p < len && payload != IKEV2_PAYLOAD_NONE)
748 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
749 u32 plen = clib_net_to_host_u16 (ikep->length);
751 if (plen < sizeof (ike_payload_header_t))
754 if (payload == IKEV2_PAYLOAD_SA)
756 ikev2_sa_free_proposal_vector (&sa->r_proposals);
757 sa->r_proposals = ikev2_parse_sa_payload (ikep);
760 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
762 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
765 else if (payload == IKEV2_PAYLOAD_KE)
767 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
768 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
769 vec_free (sa->r_dh_data);
770 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
772 else if (payload == IKEV2_PAYLOAD_NONCE)
774 vec_free (sa->r_nonce);
775 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
777 else if (payload == IKEV2_PAYLOAD_NOTIFY)
779 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
780 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
782 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
787 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
789 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
790 " behind NAT, unsupported", sa->ispi);
794 else if (n->msg_type ==
795 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
797 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
801 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
804 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
805 " (self) behind NAT", sa->ispi);
811 else if (payload == IKEV2_PAYLOAD_VENDOR)
813 ikev2_parse_vendor_payload (ikep);
817 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
819 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
821 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
822 sa->unsupported_cp = payload;
827 payload = ikep->nextpayload;
833 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
838 u32 len = clib_net_to_host_u32 (ike->length);
839 ike_payload_header_t *ikep = 0;
841 ikev2_sa_transform_t *tr_integ;
843 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
845 if (!sa->sk_ar || !sa->sk_ai)
849 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
851 ikep = (ike_payload_header_t *) & ike->payload[p];
852 plen = clib_net_to_host_u16 (ikep->length);
854 if (plen < sizeof (*ikep))
857 if (*payload == IKEV2_PAYLOAD_SK)
859 last_payload = *payload;
863 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
865 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
867 sa->unsupported_cp = *payload;
872 *payload = ikep->nextpayload;
876 if (last_payload != IKEV2_PAYLOAD_SK)
878 ikev2_elog_error ("Last payload must be SK");
883 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
884 (u8 *) ike, len - tr_integ->key_trunc);
886 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
888 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
890 ikev2_elog_error ("message integrity check failed");
896 return ikev2_decrypt_data (sa, ikep->payload, plen);
900 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
902 ikev2_main_t *km = &ikev2_main;
906 u32 thread_index = vlib_get_thread_index ();
908 if (!sa->initial_contact)
911 /* find old IKE SAs with the same authenticated identity */
913 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
914 if (tmp->i_id.type != sa->i_id.type ||
915 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
916 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
919 if (sa->rspi != tmp->rspi)
920 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
924 for (i = 0; i < vec_len (delete); i++)
927 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
929 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
931 ikev2_delete_sa (tmp);
935 sa->initial_contact = 0;
939 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
941 ikev2_child_sa_t *first_child_sa;
943 u8 payload = ike->nextpayload;
945 ike_payload_header_t *ikep;
948 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
949 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
950 clib_host_to_net_u64 (ike->rspi),
951 sa->is_initiator ? sa->raddr.as_u32 : sa->
954 ikev2_calc_keys (sa);
956 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
960 if (sa->unsupported_cp)
961 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
962 goto cleanup_and_exit;
965 /* select or create 1st child SA */
966 if (sa->is_initiator)
968 first_child_sa = &sa->childs[0];
972 ikev2_sa_free_all_child_sa (&sa->childs);
973 vec_add2 (sa->childs, first_child_sa, 1);
977 /* process encrypted payload */
979 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
981 ikep = (ike_payload_header_t *) & plaintext[p];
982 plen = clib_net_to_host_u16 (ikep->length);
984 if (plen < sizeof (ike_payload_header_t))
985 goto cleanup_and_exit;
987 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
989 if (sa->is_initiator)
991 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
992 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
996 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
997 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1000 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1002 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1004 sa->i_id.type = id->id_type;
1005 vec_free (sa->i_id.data);
1006 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1008 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1010 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1012 sa->r_id.type = id->id_type;
1013 vec_free (sa->r_id.data);
1014 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1016 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1018 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1020 if (sa->is_initiator)
1022 sa->r_auth.method = a->auth_method;
1023 vec_free (sa->r_auth.data);
1024 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1028 sa->i_auth.method = a->auth_method;
1029 vec_free (sa->i_auth.data);
1030 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1033 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1035 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1036 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1038 sa->initial_contact = 1;
1042 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1044 ikev2_parse_vendor_payload (ikep);
1046 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1048 vec_free (first_child_sa->tsi);
1049 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1051 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1053 vec_free (first_child_sa->tsr);
1054 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1058 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1061 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1063 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1064 sa->unsupported_cp = payload;
1069 payload = ikep->nextpayload;
1074 vec_free (plaintext);
1078 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1082 u8 payload = ike->nextpayload;
1084 ike_payload_header_t *ikep;
1087 sa->liveness_retries = 0;
1088 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1089 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1090 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1092 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1095 goto cleanup_and_exit;
1097 /* process encrypted payload */
1099 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1101 ikep = (ike_payload_header_t *) & plaintext[p];
1102 plen = clib_net_to_host_u16 (ikep->length);
1104 if (plen < sizeof (ike_payload_header_t))
1105 goto cleanup_and_exit;
1107 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1109 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1110 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1111 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1114 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1116 sa->del = ikev2_parse_delete_payload (ikep);
1118 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1120 ikev2_parse_vendor_payload (ikep);
1124 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1126 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1128 sa->unsupported_cp = payload;
1133 payload = ikep->nextpayload;
1138 vec_free (plaintext);
1142 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1146 u8 payload = ike->nextpayload;
1149 u8 nonce[IKEV2_NONCE_SIZE];
1151 ike_payload_header_t *ikep;
1153 ikev2_notify_t *n = 0;
1154 ikev2_ts_t *tsi = 0;
1155 ikev2_ts_t *tsr = 0;
1156 ikev2_sa_proposal_t *proposal = 0;
1157 ikev2_child_sa_t *child_sa;
1159 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1160 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1161 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1163 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1166 goto cleanup_and_exit;
1168 /* process encrypted payload */
1170 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1172 ikep = (ike_payload_header_t *) & plaintext[p];
1173 plen = clib_net_to_host_u16 (ikep->length);
1175 if (plen < sizeof (ike_payload_header_t))
1176 goto cleanup_and_exit;
1178 else if (payload == IKEV2_PAYLOAD_SA)
1180 proposal = ikev2_parse_sa_payload (ikep);
1182 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1184 n = ikev2_parse_notify_payload (ikep);
1185 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1190 else if (payload == IKEV2_PAYLOAD_DELETE)
1192 sa->del = ikev2_parse_delete_payload (ikep);
1194 else if (payload == IKEV2_PAYLOAD_VENDOR)
1196 ikev2_parse_vendor_payload (ikep);
1198 else if (payload == IKEV2_PAYLOAD_NONCE)
1200 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1202 else if (payload == IKEV2_PAYLOAD_TSI)
1204 tsi = ikev2_parse_ts_payload (ikep);
1206 else if (payload == IKEV2_PAYLOAD_TSR)
1208 tsr = ikev2_parse_ts_payload (ikep);
1212 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1214 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1216 sa->unsupported_cp = payload;
1217 goto cleanup_and_exit;
1221 payload = ikep->nextpayload;
1225 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1227 ikev2_rekey_t *rekey = &sa->rekey[0];
1228 rekey->protocol_id = proposal->protocol_id;
1230 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1231 rekey->i_proposal->spi = rekey->spi;
1232 rekey->r_proposal = proposal;
1236 vec_free (sa->r_nonce);
1237 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1238 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1241 child_sa->rekey_retries = 0;
1246 ikev2_rekey_t *rekey;
1247 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1250 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1252 goto cleanup_and_exit;
1254 vec_add2 (sa->rekey, rekey, 1);
1255 rekey->protocol_id = n->protocol_id;
1256 rekey->spi = n->spi;
1257 rekey->i_proposal = proposal;
1259 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1263 vec_free (sa->i_nonce);
1264 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1265 /* generate new Nr */
1266 vec_free (sa->r_nonce);
1267 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1268 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1272 vec_free (plaintext);
1277 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1285 ikev2_sa_transform_t *tr_prf;
1288 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1294 nonce = sa->i_nonce;
1295 packet_data = sa->last_sa_init_res_packet_data;
1301 nonce = sa->r_nonce;
1302 packet_data = sa->last_sa_init_req_packet_data;
1305 data = vec_new (u8, 4);
1307 vec_append (data, id->data);
1309 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1310 vec_append (authmsg, packet_data);
1311 vec_append (authmsg, nonce);
1312 vec_append (authmsg, id_hash);
1320 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1322 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1323 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1324 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1325 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1332 ikev2_sa_match_ts (ikev2_sa_t * sa)
1334 ikev2_main_t *km = &ikev2_main;
1336 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1340 pool_foreach (p, km->profiles, ({
1342 if (sa->is_initiator)
1356 if (p->rem_id.type != id->type ||
1357 vec_len(p->rem_id.data) != vec_len(id->data) ||
1358 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1361 vec_foreach(ts, sa->childs[0].tsi)
1363 if (ikev2_ts_cmp(p_tsi, ts))
1365 vec_add1 (tsi, ts[0]);
1370 vec_foreach(ts, sa->childs[0].tsr)
1372 if (ikev2_ts_cmp(p_tsr, ts))
1374 vec_add1 (tsr, ts[0]);
1385 vec_free (sa->childs[0].tsi);
1386 vec_free (sa->childs[0].tsr);
1387 sa->childs[0].tsi = tsi;
1388 sa->childs[0].tsr = tsr;
1394 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1399 ikev2_sa_auth (ikev2_sa_t * sa)
1401 ikev2_main_t *km = &ikev2_main;
1402 ikev2_profile_t *p, *sel_p = 0;
1403 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1404 ikev2_sa_transform_t *tr_prf;
1407 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1409 /* only shared key and rsa signature */
1410 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1411 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1413 ikev2_elog_uint (IKEV2_LOG_ERROR,
1414 "unsupported authentication method %u",
1416 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1420 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1421 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1424 ikev2_auth_t *sa_auth;
1426 if (sa->is_initiator)
1429 sa_auth = &sa->r_auth;
1434 sa_auth = &sa->i_auth;
1438 pool_foreach (p, km->profiles, ({
1441 if (p->rem_id.type != sa_id->type ||
1442 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1443 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1446 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1448 if (!p->auth.data ||
1449 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1452 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1453 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1455 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1457 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1464 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1466 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1469 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1471 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1484 sa->udp_encap = sel_p->udp_encap;
1485 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1489 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1491 if (!sa->is_initiator)
1493 vec_free (sa->r_id.data);
1494 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1495 sa->r_id.type = sel_p->loc_id.type;
1497 /* generate our auth data */
1498 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1499 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1501 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1502 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1504 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1506 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1507 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1511 /* select transforms for 1st child sa */
1512 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1513 sa->childs[0].r_proposals =
1514 ikev2_select_proposal (sa->childs[0].i_proposals,
1515 IKEV2_PROTOCOL_ESP);
1517 if (~0 != sel_p->tun_itf)
1519 sa->is_tun_itf_set = 1;
1520 sa->tun_itf = sel_p->tun_itf;
1526 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1527 "profile found! ispi %lx", sa->ispi);
1528 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1536 ikev2_sa_auth_init (ikev2_sa_t * sa)
1538 ikev2_main_t *km = &ikev2_main;
1539 u8 *authmsg, *key_pad, *psk = 0;
1540 ikev2_sa_transform_t *tr_prf;
1543 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1545 /* only shared key and rsa signature */
1546 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1547 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1549 ikev2_elog_uint (IKEV2_LOG_ERROR,
1550 "unsupported authentication method %u",
1552 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1556 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1557 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1558 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1560 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1562 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1563 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1565 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1567 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1568 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1577 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1579 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1583 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1585 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1595 ipsec_sa_flags_t flags;
1598 ipsec_crypto_alg_t encr_type;
1599 ipsec_integ_alg_t integ_type;
1600 ip46_address_t local_ip;
1601 ip46_address_t remote_ip;
1602 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1604 u32 old_remote_sa_id;
1605 u16 ipsec_over_udp_port;
1608 } ikev2_add_ipsec_tunnel_args_t;
1611 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1613 ikev2_main_t *km = &ikev2_main;
1617 if (~0 == a->sw_if_index)
1619 /* no tunnel associated with the SA/profile - create a new one */
1620 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1621 &a->local_ip, &a->remote_ip, 0,
1622 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1623 TUNNEL_MODE_P2P, &sw_if_index);
1625 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1627 if (hash_get (km->sw_if_indices, sw_if_index))
1628 /* interface is managed by IKE; proceed with updating SAs */
1631 hash_set1 (km->sw_if_indices, sw_if_index);
1635 sw_if_index = a->sw_if_index;
1636 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1641 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1642 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1643 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1648 vec_add1 (sas_in, a->remote_sa_id);
1651 ipsec_tun_protect_del (sw_if_index, NULL);
1653 /* replace local SA immediately */
1654 ipsec_sa_unlock_id (a->local_sa_id);
1656 /* keep the old sa */
1657 vec_add1 (sas_in, a->old_remote_sa_id);
1660 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1662 IPSEC_PROTOCOL_ESP, a->encr_type,
1663 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1664 a->flags, 0, a->salt_local, &a->local_ip,
1665 &a->remote_ip, NULL, a->src_port, a->dst_port);
1666 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1667 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1668 a->integ_type, &a->rem_ikey,
1669 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1670 a->salt_remote, &a->remote_ip,
1671 &a->local_ip, NULL, a->ipsec_over_udp_port,
1672 a->ipsec_over_udp_port);
1674 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1678 ikev2_create_tunnel_interface (vlib_main_t * vm,
1681 ikev2_child_sa_t * child, u32 sa_index,
1682 u32 child_index, u8 is_rekey)
1684 ikev2_main_t *km = &ikev2_main;
1685 ipsec_crypto_alg_t encr_type;
1686 ipsec_integ_alg_t integ_type;
1687 ikev2_profile_t *p = 0;
1688 ikev2_sa_transform_t *tr;
1689 ikev2_sa_proposal_t *proposals;
1691 ikev2_add_ipsec_tunnel_args_t a;
1693 clib_memset (&a, 0, sizeof (a));
1695 if (!child->r_proposals)
1697 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1701 if (sa->is_initiator)
1703 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1704 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1705 proposals = child->i_proposals;
1706 a.local_spi = child->r_proposals[0].spi;
1707 a.remote_spi = child->i_proposals[0].spi;
1711 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1712 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1713 proposals = child->r_proposals;
1714 a.local_spi = child->i_proposals[0].spi;
1715 a.remote_spi = child->r_proposals[0].spi;
1718 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1721 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1722 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1725 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1726 a.is_rekey = is_rekey;
1728 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1729 if (tr && tr->esn_type)
1730 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1732 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1735 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1737 switch (tr->key_len)
1740 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1743 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1746 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1749 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1754 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1757 switch (tr->key_len)
1760 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1763 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1766 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1769 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1777 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1783 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1786 a.encr_type = encr_type;
1790 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1793 switch (tr->integ_type)
1795 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1796 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1798 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1799 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1801 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1802 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1804 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1805 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1808 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1814 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1820 integ_type = IPSEC_INTEG_ALG_NONE;
1823 a.integ_type = integ_type;
1824 ikev2_calc_child_keys (sa, child);
1826 if (sa->is_initiator)
1828 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1829 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1830 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1831 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1834 a.salt_remote = child->salt_er;
1835 a.salt_local = child->salt_ei;
1837 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1841 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1842 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1843 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1844 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1847 a.salt_remote = child->salt_ei;
1848 a.salt_local = child->salt_er;
1850 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1851 a.src_port = sa->ipsec_over_udp_port;
1854 if (sa->is_profile_index_set)
1855 p = pool_elt_at_index (km->profiles, sa->profile_index);
1857 if (p && p->lifetime)
1859 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1860 if (p->lifetime_jitter)
1862 // This is not much better than rand(3), which Coverity warns
1863 // is unsuitable for security applications; random_u32 is
1864 // however fast. If this perturbance to the expiration time
1865 // needs to use a better RNG then we may need to use something
1866 // like /dev/urandom which has significant overhead.
1867 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1868 rnd = random_u32 (&rnd);
1870 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1874 if (thread_index & 0xffffffc0)
1875 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1877 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1878 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1880 child->local_sa_id =
1882 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1884 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1889 /* create a new remote SA ID to keep the old SA for a bit longer
1890 * so the peer has some time to swap their SAs */
1892 /* use most significat bit of child index part in id */
1894 if (sa->current_remote_id_mask)
1896 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1897 sa->current_remote_id_mask = 0;
1901 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1902 sa->current_remote_id_mask = mask;
1903 remote_sa_id |= mask;
1905 sa->old_id_expiration = 3.0;
1906 sa->old_remote_id_present = 1;
1909 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1911 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1912 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1914 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1915 (u8 *) & a, sizeof (a));
1921 ip46_address_t local_ip;
1922 ip46_address_t remote_ip;
1926 } ikev2_del_ipsec_tunnel_args_t;
1928 static_always_inline u32
1929 ikev2_flip_alternate_sa_bit (u32 id)
1938 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1940 ikev2_main_t *km = &ikev2_main;
1941 ipip_tunnel_t *ipip = NULL;
1944 if (~0 == a->sw_if_index)
1947 ipip_tunnel_key_t key = {
1949 .dst = a->remote_ip,
1950 .transport = IPIP_TRANSPORT_IP4,
1955 ipip = ipip_tunnel_db_find (&key);
1959 sw_if_index = ipip->sw_if_index;
1960 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1967 sw_if_index = a->sw_if_index;
1968 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1971 if (~0 != sw_if_index)
1972 ipsec_tun_protect_del (sw_if_index, NULL);
1974 ipsec_sa_unlock_id (a->remote_sa_id);
1975 ipsec_sa_unlock_id (a->local_sa_id);
1976 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
1979 ipip_del_tunnel (ipip->sw_if_index);
1983 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1984 ikev2_child_sa_t * child)
1986 ikev2_del_ipsec_tunnel_args_t a;
1988 clib_memset (&a, 0, sizeof (a));
1990 if (sa->is_initiator)
1992 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1993 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1997 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1998 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2001 a.remote_sa_id = child->remote_sa_id;
2002 a.local_sa_id = child->local_sa_id;
2003 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2005 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2011 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2015 ike_payload_header_t *ph;
2019 ikev2_sa_transform_t *tr_encr, *tr_integ;
2021 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2023 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2025 ikev2_payload_chain_t *chain = 0;
2026 ikev2_payload_new_chain (chain);
2028 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2030 if (sa->r_proposals == 0)
2032 ikev2_payload_add_notify (chain,
2033 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2034 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2036 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2038 u8 *data = vec_new (u8, 2);
2039 ikev2_sa_transform_t *tr_dh;
2041 ikev2_sa_get_td_for_type (sa->r_proposals,
2042 IKEV2_TRANSFORM_TYPE_DH);
2043 ASSERT (tr_dh && tr_dh->dh_type);
2045 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2046 data[1] = (tr_dh->dh_type) & 0xff;
2048 ikev2_payload_add_notify (chain,
2049 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2052 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2054 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2056 u8 *data = vec_new (u8, 1);
2058 data[0] = sa->unsupported_cp;
2059 ikev2_payload_add_notify (chain,
2060 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2068 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2069 ikev2_payload_add_sa (chain, sa->r_proposals);
2070 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2071 ikev2_payload_add_nonce (chain, sa->r_nonce);
2073 u8 *nat_detection_sha1 =
2074 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2075 clib_host_to_net_u64 (sa->rspi),
2076 clib_host_to_net_u32 (sa->raddr.as_u32),
2078 ikev2_payload_add_notify (chain,
2079 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2080 nat_detection_sha1);
2081 vec_free (nat_detection_sha1);
2082 nat_detection_sha1 =
2083 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2084 clib_host_to_net_u64 (sa->rspi),
2085 sa->iaddr.as_u32, udp->src_port);
2086 ikev2_payload_add_notify (chain,
2087 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2088 nat_detection_sha1);
2089 vec_free (nat_detection_sha1);
2092 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2094 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2096 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2097 ikev2_payload_add_auth (chain, &sa->r_auth);
2098 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2099 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2100 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2102 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2104 ikev2_payload_add_notify (chain,
2105 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2107 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2109 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2111 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2113 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2114 ikev2_payload_add_auth (chain, &sa->r_auth);
2116 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2118 ikev2_payload_add_notify (chain,
2119 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2120 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2121 ikev2_payload_add_auth (chain, &sa->r_auth);
2122 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2123 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2125 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2127 u8 *data = vec_new (u8, 1);
2129 data[0] = sa->unsupported_cp;
2130 ikev2_payload_add_notify (chain,
2131 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2135 else if (sa->state == IKEV2_STATE_SA_INIT)
2137 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2138 ikev2_payload_add_auth (chain, &sa->i_auth);
2139 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2140 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2141 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2142 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2147 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2151 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2153 /* if pending delete */
2156 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2158 if (sa->is_initiator)
2159 ikev2_payload_add_delete (chain, sa->del);
2161 /* The response to a request that deletes the IKE SA is an empty
2162 INFORMATIONAL response. */
2163 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2165 /* The response to a request that deletes ESP or AH SAs will contain
2166 delete payloads for the paired SAs going in the other direction. */
2169 ikev2_payload_add_delete (chain, sa->del);
2174 /* received N(AUTHENTICATION_FAILED) */
2175 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2177 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2180 /* received unsupported critical payload */
2181 else if (sa->unsupported_cp)
2183 u8 *data = vec_new (u8, 1);
2185 data[0] = sa->unsupported_cp;
2186 ikev2_payload_add_notify (chain,
2187 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2190 sa->unsupported_cp = 0;
2192 /* else send empty response */
2194 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2196 if (sa->is_initiator)
2199 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2200 ikev2_notify_t notify;
2201 u8 *data = vec_new (u8, 4);
2202 clib_memset (¬ify, 0, sizeof (notify));
2203 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2204 notify.spi = sa->childs[0].i_proposals->spi;
2205 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2207 ikev2_payload_add_sa (chain, proposals);
2208 ikev2_payload_add_nonce (chain, sa->i_nonce);
2209 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2210 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2211 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2218 if (vec_len (sa->rekey) > 0)
2220 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2221 ikev2_payload_add_nonce (chain, sa->r_nonce);
2222 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2224 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2226 vec_del1 (sa->rekey, 0);
2228 else if (sa->unsupported_cp)
2230 u8 *data = vec_new (u8, 1);
2232 data[0] = sa->unsupported_cp;
2233 ikev2_payload_add_notify (chain,
2234 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2237 sa->unsupported_cp = 0;
2241 ikev2_payload_add_notify (chain,
2242 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2249 ike->version = IKE_VERSION_2;
2250 ike->nextpayload = IKEV2_PAYLOAD_SK;
2251 tlen = sizeof (*ike);
2252 if (sa->is_initiator)
2254 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2255 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2259 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2263 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2265 tlen += vec_len (chain->data);
2266 ike->nextpayload = chain->first_payload_type;
2267 ike->length = clib_host_to_net_u32 (tlen);
2268 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2270 /* store whole IKE payload - needed for PSK auth */
2271 vec_free (sa->last_sa_init_res_packet_data);
2272 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2277 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2280 plen = sizeof (*ph);
2281 ph = (ike_payload_header_t *) & ike->payload[0];
2282 ph->nextpayload = chain->first_payload_type;
2284 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2287 /* add space for hmac */
2288 plen += tr_integ->key_trunc;
2291 /* payload and total length */
2292 ph->length = clib_host_to_net_u16 (plen);
2293 ike->length = clib_host_to_net_u32 (tlen);
2295 /* calc integrity data for whole packet except hash itself */
2297 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2298 (u8 *) ike, tlen - tr_integ->key_trunc);
2300 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2301 sizeof (*ike), integ, tr_integ->key_trunc);
2303 /* store whole IKE payload - needed for retransmit */
2304 vec_free (sa->last_res_packet_data);
2305 vec_add (sa->last_res_packet_data, ike, tlen);
2309 ikev2_payload_destroy_chain (chain);
2315 ikev2_retransmit_sa_init (ike_header_t * ike,
2316 ip4_address_t iaddr, ip4_address_t raddr)
2318 ikev2_main_t *km = &ikev2_main;
2320 u32 thread_index = vlib_get_thread_index ();
2323 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2324 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2325 sa->iaddr.as_u32 == iaddr.as_u32 &&
2326 sa->raddr.as_u32 == raddr.as_u32)
2329 u32 len = clib_net_to_host_u32(ike->length);
2330 u8 payload = ike->nextpayload;
2332 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2333 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2334 u32 plen = clib_net_to_host_u16(ikep->length);
2336 if (plen < sizeof(ike_payload_header_t))
2339 if (payload == IKEV2_PAYLOAD_NONCE)
2341 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2343 /* req is retransmit */
2344 if (sa->state == IKEV2_STATE_SA_INIT)
2347 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2348 ike->ispi = tmp->ispi;
2349 ike->rspi = tmp->rspi;
2350 ike->nextpayload = tmp->nextpayload;
2351 ike->version = tmp->version;
2352 ike->exchange = tmp->exchange;
2353 ike->flags = tmp->flags;
2354 ike->msgid = tmp->msgid;
2355 ike->length = tmp->length;
2356 clib_memcpy_fast(ike->payload, tmp->payload,
2357 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2358 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2359 "ispi %lx IKE_SA_INIT retransmit "
2360 "from %d.%d.%d.%d to %d.%d.%d.%d",
2362 raddr.as_u32, iaddr.as_u32);
2365 /* else ignore req */
2368 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2369 "ispi %lx IKE_SA_INIT ignore "
2370 "from %d.%d.%d.%d to %d.%d.%d.%d",
2372 raddr.as_u32, iaddr.as_u32);
2377 payload = ikep->nextpayload;
2384 /* req is not retransmit */
2389 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2391 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2394 if (msg_id > sa->last_msg_id)
2396 sa->last_msg_id = msg_id;
2399 /* retransmitted req */
2400 else if (msg_id == sa->last_msg_id)
2403 tmp = (ike_header_t *) sa->last_res_packet_data;
2404 ike->ispi = tmp->ispi;
2405 ike->rspi = tmp->rspi;
2406 ike->nextpayload = tmp->nextpayload;
2407 ike->version = tmp->version;
2408 ike->exchange = tmp->exchange;
2409 ike->flags = tmp->flags;
2410 ike->msgid = tmp->msgid;
2411 ike->length = tmp->length;
2412 clib_memcpy_fast (ike->payload, tmp->payload,
2413 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2414 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2415 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2418 /* old req ignore */
2421 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2422 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2428 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2430 ikev2_main_t *km = &ikev2_main;
2431 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2435 ikev2_del_sa_init_from_main (u64 * ispi)
2437 ikev2_main_t *km = &ikev2_main;
2438 uword *p = hash_get (km->sa_by_ispi, *ispi);
2441 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2442 hash_unset (km->sa_by_ispi, sai->ispi);
2443 ikev2_sa_free_all_vec (sai);
2444 pool_put (km->sais, sai);
2449 ikev2_del_sa_init (u64 ispi)
2451 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2456 ikev2_node_fn (vlib_main_t * vm,
2457 vlib_node_runtime_t * node, vlib_frame_t * frame)
2459 u32 n_left_from, *from, *to_next;
2460 ikev2_next_t next_index;
2461 ikev2_main_t *km = &ikev2_main;
2462 u32 thread_index = vlib_get_thread_index ();
2464 from = vlib_frame_vector_args (frame);
2465 n_left_from = frame->n_vectors;
2466 next_index = node->cached_next_index;
2468 while (n_left_from > 0)
2472 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2474 while (n_left_from > 0 && n_left_to_next > 0)
2478 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2483 ikev2_sa_t *sa0 = 0;
2484 ikev2_sa_t sa; /* temporary store for SA */
2486 int r, is_req = 0, has_non_esp_marker = 0;
2488 /* speculatively enqueue b0 to the current next frame */
2494 n_left_to_next -= 1;
2496 b0 = vlib_get_buffer (vm, bi0);
2498 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2500 u8 *ptr = vlib_buffer_get_current (b0);
2501 ip40 = (ip4_header_t *) ptr;
2502 ptr += sizeof (*ip40);
2503 udp0 = (udp_header_t *) ptr;
2504 ptr += sizeof (*udp0);
2505 ike0 = (ike_header_t *) ptr;
2509 ike0 = vlib_buffer_get_current (b0);
2510 vlib_buffer_advance (b0, -sizeof (*udp0));
2511 udp0 = vlib_buffer_get_current (b0);
2512 vlib_buffer_advance (b0, -sizeof (*ip40));
2513 ip40 = vlib_buffer_get_current (b0);
2516 /* check for non-esp marker */
2517 if (*((u32 *) ike0) == 0)
2519 ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32));
2520 has_non_esp_marker = 1;
2523 if (ike0->version != IKE_VERSION_2)
2525 vlib_node_increment_counter (vm, ikev2_node.index,
2526 IKEV2_ERROR_NOT_IKEV2, 1);
2530 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2533 clib_memset (sa0, 0, sizeof (*sa0));
2535 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2537 if (ike0->rspi == 0)
2539 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2540 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2541 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2543 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2547 vlib_node_increment_counter (vm, ikev2_node.index,
2548 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2550 len = clib_net_to_host_u32 (ike0->length);
2555 vlib_node_increment_counter (vm, ikev2_node.index,
2556 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2561 ikev2_process_sa_init_req (vm, sa0, ike0, udp0);
2563 if (sa0->state == IKEV2_STATE_SA_INIT)
2565 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2567 ikev2_select_proposal (sa0->i_proposals,
2568 IKEV2_PROTOCOL_IKE);
2569 ikev2_generate_sa_init_data (sa0);
2572 if (sa0->state == IKEV2_STATE_SA_INIT
2573 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2575 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2578 if (sa0->state == IKEV2_STATE_SA_INIT)
2580 /* add SA to the pool */
2581 pool_get (km->per_thread_data[thread_index].sas,
2583 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2584 ikev2_init_sa (vm, sa0);
2586 per_thread_data[thread_index].sa_by_rspi,
2589 km->per_thread_data[thread_index].sas);
2593 ikev2_sa_free_all_vec (sa0);
2597 else //received sa_init without initiator flag
2599 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2600 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2601 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0);
2603 if (sa0->state == IKEV2_STATE_SA_INIT)
2606 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2607 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2611 pool_elt_at_index (km->sais, p[0]);
2613 if (clib_atomic_bool_cmp_and_swap
2614 (&sai->init_response_received, 0, 1))
2616 ikev2_complete_sa_data (sa0, sai);
2617 ikev2_calc_keys (sa0);
2618 ikev2_sa_auth_init (sa0);
2620 ikev2_generate_message (sa0, ike0, 0, udp0);
2624 /* we've already processed sa-init response */
2625 sa0->state = IKEV2_STATE_UNKNOWN;
2630 if (sa0->state == IKEV2_STATE_SA_INIT)
2632 /* add SA to the pool */
2633 pool_get (km->per_thread_data[thread_index].sas, sa0);
2634 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2635 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2637 sa0 - km->per_thread_data[thread_index].sas);
2641 ikev2_sa_free_all_vec (sa0);
2645 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2648 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2649 clib_net_to_host_u64 (ike0->rspi));
2653 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2656 r = ikev2_retransmit_resp (sa0, ike0);
2659 vlib_node_increment_counter (vm, ikev2_node.index,
2660 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2662 len = clib_net_to_host_u32 (ike0->length);
2667 vlib_node_increment_counter (vm, ikev2_node.index,
2668 IKEV2_ERROR_IKE_REQ_IGNORE,
2673 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2674 ikev2_process_auth_req (vm, sa0, ike0);
2675 ikev2_sa_auth (sa0);
2676 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2678 ikev2_initial_contact_cleanup (sa0);
2679 ikev2_sa_match_ts (sa0);
2680 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2681 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2686 if (sa0->is_initiator)
2688 ikev2_del_sa_init (ike0->ispi);
2692 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2696 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2699 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2700 clib_net_to_host_u64 (ike0->rspi));
2704 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2707 r = ikev2_retransmit_resp (sa0, ike0);
2710 vlib_node_increment_counter (vm, ikev2_node.index,
2711 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2713 len = clib_net_to_host_u32 (ike0->length);
2718 vlib_node_increment_counter (vm, ikev2_node.index,
2719 IKEV2_ERROR_IKE_REQ_IGNORE,
2724 ikev2_process_informational_req (vm, sa0, ike0);
2727 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2729 ikev2_delete_t *d, *tmp, *resp = 0;
2730 vec_foreach (d, sa0->del)
2732 ikev2_child_sa_t *ch_sa;
2733 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2735 !sa0->is_initiator);
2738 ikev2_delete_tunnel_interface (km->vnet_main,
2740 if (!sa0->is_initiator)
2742 vec_add2 (resp, tmp, 1);
2743 tmp->protocol_id = d->protocol_id;
2744 tmp->spi = ch_sa->r_proposals[0].spi;
2746 ikev2_sa_del_child_sa (sa0, ch_sa);
2749 if (!sa0->is_initiator)
2751 vec_free (sa0->del);
2756 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2758 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2759 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2763 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2766 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2767 clib_net_to_host_u64 (ike0->rspi));
2771 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2774 r = ikev2_retransmit_resp (sa0, ike0);
2777 vlib_node_increment_counter (vm, ikev2_node.index,
2778 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2780 len = clib_net_to_host_u32 (ike0->length);
2785 vlib_node_increment_counter (vm, ikev2_node.index,
2786 IKEV2_ERROR_IKE_REQ_IGNORE,
2791 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2794 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2797 ikev2_sa_free_all_child_sa (&sa0->childs);
2798 ikev2_child_sa_t *child;
2799 vec_add2 (sa0->childs, child, 1);
2800 clib_memset (child, 0, sizeof (*child));
2801 child->r_proposals = sa0->rekey[0].r_proposal;
2802 child->i_proposals = sa0->rekey[0].i_proposal;
2803 child->tsi = sa0->rekey[0].tsi;
2804 child->tsr = sa0->rekey[0].tsr;
2805 ikev2_create_tunnel_interface (vm, thread_index,
2807 child - sa0->childs,
2810 if (sa0->is_initiator)
2812 vec_free (sa0->rekey);
2816 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2823 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2824 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2826 ip40->src_address.as_u32,
2827 ip40->dst_address.as_u32);
2831 /* if we are sending packet back, rewrite headers */
2834 next0 = IKEV2_NEXT_IP4_LOOKUP;
2835 if (sa0->is_initiator)
2837 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2838 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2842 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2843 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2848 udp0->dst_port = udp0->src_port =
2849 clib_net_to_host_u16 (ikev2_get_port (sa0));
2851 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2854 if (!has_non_esp_marker)
2855 len = ikev2_insert_non_esp_marker (ike0, len);
2860 if (has_non_esp_marker)
2861 len += sizeof (ikev2_non_esp_marker);
2863 u16 tp = udp0->dst_port;
2864 udp0->dst_port = udp0->src_port;
2865 udp0->src_port = tp;
2869 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2871 b0->current_length =
2872 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2873 ip40->length = clib_host_to_net_u16 (b0->current_length);
2874 ip40->checksum = ip4_header_checksum (ip40);
2877 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2878 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2880 ikev2_child_sa_t *c;
2882 vec_foreach (c, sa0->childs)
2883 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2885 ikev2_delete_sa (sa0);
2887 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2889 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2890 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2892 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2893 t->sw_if_index = sw_if_index0;
2894 t->next_index = next0;
2897 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2898 n_left_to_next, bi0, next0);
2901 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2904 vlib_node_increment_counter (vm, ikev2_node.index,
2905 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2906 return frame->n_vectors;
2910 VLIB_REGISTER_NODE (ikev2_node,static) = {
2911 .function = ikev2_node_fn,
2913 .vector_size = sizeof (u32),
2914 .format_trace = format_ikev2_trace,
2915 .type = VLIB_NODE_TYPE_INTERNAL,
2917 .n_errors = ARRAY_LEN(ikev2_error_strings),
2918 .error_strings = ikev2_error_strings,
2920 .n_next_nodes = IKEV2_N_NEXT,
2923 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2924 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2929 // set ikev2 proposals when vpp is used as initiator
2930 static clib_error_t *
2931 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2932 ikev2_transforms_set * ts,
2933 ikev2_sa_proposal_t ** proposals, int is_ike)
2936 ikev2_main_t *km = &ikev2_main;
2937 ikev2_sa_proposal_t *proposal;
2938 vec_add2 (*proposals, proposal, 1);
2939 ikev2_sa_transform_t *td;
2944 vec_foreach (td, km->supported_transforms)
2946 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2947 && td->encr_type == ts->crypto_alg
2948 && td->key_len == ts->crypto_key_size / 8)
2951 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2952 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2953 vec_add (td->attrs, (u8 *) attr, 4);
2954 vec_add1 (proposal->transforms, *td);
2963 r = clib_error_return (0, "Unsupported algorithm");
2967 if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2971 vec_foreach (td, km->supported_transforms)
2973 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2974 && td->integ_type == ts->integ_alg)
2976 vec_add1 (proposal->transforms, *td);
2984 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2985 r = clib_error_return (0, "Unsupported algorithm");
2994 vec_foreach (td, km->supported_transforms)
2996 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2997 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2999 vec_add1 (proposal->transforms, *td);
3006 r = clib_error_return (0, "Unsupported algorithm");
3012 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
3015 vec_foreach (td, km->supported_transforms)
3017 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3019 vec_add1 (proposal->transforms, *td);
3022 sa->dh_group = td->dh_type;
3030 r = clib_error_return (0, "Unsupported algorithm");
3038 vec_foreach (td, km->supported_transforms)
3040 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3042 vec_add1 (proposal->transforms, *td);
3049 r = clib_error_return (0, "Unsupported algorithm");
3058 static ikev2_profile_t *
3059 ikev2_profile_index_by_name (u8 * name)
3061 ikev2_main_t *km = &ikev2_main;
3064 p = mhash_get (&km->profile_index_by_name, name);
3068 return pool_elt_at_index (km->profiles, p[0]);
3073 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3074 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3082 b0 = vlib_get_buffer (vm, bi0);
3083 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3084 udp0 = vlib_buffer_get_current (b0);
3085 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3086 ip40 = vlib_buffer_get_current (b0);
3089 ip40->ip_version_and_header_length = 0x45;
3091 ip40->fragment_id = 0;
3092 ip40->flags_and_fragment_offset = 0;
3094 ip40->protocol = IP_PROTOCOL_UDP;
3095 ip40->dst_address.as_u32 = dst->as_u32;
3096 ip40->src_address.as_u32 = src->as_u32;
3097 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3098 udp0->src_port = clib_host_to_net_u16 (src_port);
3099 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3101 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3102 ip40->length = clib_host_to_net_u16 (b0->current_length);
3103 ip40->checksum = ip4_header_checksum (ip40);
3105 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3106 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3108 /* send the request */
3109 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3110 to_next = vlib_frame_vector_args (f);
3113 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3118 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3121 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3126 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3127 *ike = vlib_buffer_get_current (b0);
3132 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3134 ikev2_main_t *km = &ikev2_main;
3136 km->pkey = ikev2_load_key_file (file);
3137 if (km->pkey == NULL)
3138 return clib_error_return (0, "load key '%s' failed", file);
3143 static_always_inline vnet_api_error_t
3144 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3146 ikev2_main_t *km = &ikev2_main;
3147 udp_dst_port_info_t *pi;
3149 uword *v = hash_get (km->udp_ports, port);
3150 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3154 /* IKE already uses this port, only increment reference counter */
3161 return VNET_API_ERROR_UDP_PORT_TAKEN;
3163 udp_register_dst_port (km->vlib_main, port,
3164 ipsec4_tun_input_node.index, 1);
3165 hash_set (km->udp_ports, port, 1);
3167 p->ipsec_over_udp_port = port;
3171 static_always_inline void
3172 ikev2_unregister_udp_port (ikev2_profile_t * p)
3174 ikev2_main_t *km = &ikev2_main;
3177 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3180 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3188 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3189 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3192 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3196 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3198 ikev2_main_t *km = &ikev2_main;
3203 if (ikev2_profile_index_by_name (name))
3204 return clib_error_return (0, "policy %v already exists", name);
3206 pool_get (km->profiles, p);
3207 clib_memset (p, 0, sizeof (*p));
3208 p->name = vec_dup (name);
3209 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3210 p->responder.sw_if_index = ~0;
3212 uword index = p - km->profiles;
3213 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3217 p = ikev2_profile_index_by_name (name);
3219 return clib_error_return (0, "policy %v does not exists", name);
3221 ikev2_unregister_udp_port (p);
3224 pool_put (km->profiles, p);
3225 mhash_unset (&km->profile_index_by_name, name, 0);
3231 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3232 u8 * auth_data, u8 data_hex_format)
3237 p = ikev2_profile_index_by_name (name);
3241 r = clib_error_return (0, "unknown profile %v", name);
3244 vec_free (p->auth.data);
3245 p->auth.method = auth_method;
3246 p->auth.data = vec_dup (auth_data);
3247 p->auth.hex = data_hex_format;
3249 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3251 vec_add1 (p->auth.data, 0);
3253 EVP_PKEY_free (p->auth.key);
3254 p->auth.key = ikev2_load_cert_file (auth_data);
3255 if (p->auth.key == NULL)
3256 return clib_error_return (0, "load cert '%s' failed", auth_data);
3263 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3269 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3270 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3272 r = clib_error_return (0, "unsupported identity type %U",
3273 format_ikev2_id_type, id_type);
3277 p = ikev2_profile_index_by_name (name);
3281 r = clib_error_return (0, "unknown profile %v", name);
3287 vec_free (p->loc_id.data);
3288 p->loc_id.type = id_type;
3289 p->loc_id.data = vec_dup (data);
3293 vec_free (p->rem_id.data);
3294 p->rem_id.type = id_type;
3295 p->rem_id.data = vec_dup (data);
3302 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3303 u16 start_port, u16 end_port, ip4_address_t start_addr,
3304 ip4_address_t end_addr, int is_local)
3309 p = ikev2_profile_index_by_name (name);
3313 r = clib_error_return (0, "unknown profile %v", name);
3319 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3320 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3321 p->loc_ts.start_port = start_port;
3322 p->loc_ts.end_port = end_port;
3323 p->loc_ts.protocol_id = protocol_id;
3324 p->loc_ts.ts_type = 7;
3328 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3329 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3330 p->rem_ts.start_port = start_port;
3331 p->rem_ts.end_port = end_port;
3332 p->rem_ts.protocol_id = protocol_id;
3333 p->rem_ts.ts_type = 7;
3341 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3342 u32 sw_if_index, ip4_address_t ip4)
3347 p = ikev2_profile_index_by_name (name);
3351 r = clib_error_return (0, "unknown profile %v", name);
3355 p->responder.sw_if_index = sw_if_index;
3356 p->responder.ip4 = ip4;
3362 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3363 ikev2_transform_encr_type_t crypto_alg,
3364 ikev2_transform_integ_type_t integ_alg,
3365 ikev2_transform_dh_type_t dh_type,
3366 u32 crypto_key_size)
3371 p = ikev2_profile_index_by_name (name);
3375 r = clib_error_return (0, "unknown profile %v", name);
3379 p->ike_ts.crypto_alg = crypto_alg;
3380 p->ike_ts.integ_alg = integ_alg;
3381 p->ike_ts.dh_type = dh_type;
3382 p->ike_ts.crypto_key_size = crypto_key_size;
3387 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3388 ikev2_transform_encr_type_t crypto_alg,
3389 ikev2_transform_integ_type_t integ_alg,
3390 ikev2_transform_dh_type_t dh_type,
3391 u32 crypto_key_size)
3396 p = ikev2_profile_index_by_name (name);
3400 r = clib_error_return (0, "unknown profile %v", name);
3404 p->esp_ts.crypto_alg = crypto_alg;
3405 p->esp_ts.integ_alg = integ_alg;
3406 p->esp_ts.dh_type = dh_type;
3407 p->esp_ts.crypto_key_size = crypto_key_size;
3412 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3413 u8 * name, u32 sw_if_index)
3418 p = ikev2_profile_index_by_name (name);
3422 r = clib_error_return (0, "unknown profile %v", name);
3426 p->tun_itf = sw_if_index;
3432 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3435 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3436 ikev2_main_t *km = &ikev2_main;
3437 vnet_api_error_t rv = 0;
3441 return VNET_API_ERROR_INVALID_VALUE;
3445 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3446 return VNET_API_ERROR_VALUE_EXIST;
3448 rv = ikev2_register_udp_port (p, port);
3452 v = hash_get (km->udp_ports, port);
3454 return VNET_API_ERROR_IKE_NO_PORT;
3456 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3457 return VNET_API_ERROR_INVALID_VALUE;
3459 ikev2_unregister_udp_port (p);
3465 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3467 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3472 r = clib_error_return (0, "unknown profile %v", name);
3481 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3482 u64 lifetime, u32 jitter, u32 handover,
3488 p = ikev2_profile_index_by_name (name);
3492 r = clib_error_return (0, "unknown profile %v", name);
3496 p->lifetime = lifetime;
3497 p->lifetime_jitter = jitter;
3498 p->handover = handover;
3499 p->lifetime_maxdata = maxdata;
3504 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3508 ip4_main_t *im = &ip4_main;
3509 ikev2_main_t *km = &ikev2_main;
3511 p = ikev2_profile_index_by_name (name);
3515 r = clib_error_return (0, "unknown profile %v", name);
3519 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3521 r = clib_error_return (0, "responder not set for profile %v", name);
3526 /* Create the Initiator Request */
3530 ip_lookup_main_t *lm = &im->lookup_main;
3532 int len = sizeof (ike_header_t);
3534 /* Get own iface IP */
3536 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3537 ip_interface_address_t *if_add =
3538 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3539 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3541 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3543 /* Prepare the SA and the IKE payload */
3545 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3546 ikev2_payload_chain_t *chain = 0;
3547 ikev2_payload_new_chain (chain);
3549 /* Build the IKE proposal payload */
3550 ikev2_sa_proposal_t *proposals = 0;
3551 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3552 proposals[0].proposal_num = 1;
3553 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3555 /* Add and then cleanup proposal data */
3556 ikev2_payload_add_sa (chain, proposals);
3557 ikev2_sa_free_proposal_vector (&proposals);
3559 sa.is_initiator = 1;
3560 sa.profile_index = p - km->profiles;
3561 sa.is_profile_index_set = 1;
3562 sa.state = IKEV2_STATE_SA_INIT;
3563 sa.tun_itf = p->tun_itf;
3564 sa.udp_encap = p->udp_encap;
3565 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3566 sa.is_tun_itf_set = 1;
3567 sa.initial_contact = 1;
3568 sa.dst_port = IKEV2_PORT;
3569 ikev2_generate_sa_init_data (&sa);
3570 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3571 ikev2_payload_add_nonce (chain, sa.i_nonce);
3573 /* Build the child SA proposal */
3574 vec_resize (sa.childs, 1);
3575 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3576 &sa.childs[0].i_proposals, 0);
3577 sa.childs[0].i_proposals[0].proposal_num = 1;
3578 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3579 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3580 sizeof (sa.childs[0].i_proposals[0].spi));
3582 /* Add NAT detection notification messages (mandatory) */
3583 u8 *nat_detection_sha1 =
3584 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3585 clib_host_to_net_u64 (sa.rspi),
3586 clib_host_to_net_u32 (if_ip->as_u32),
3587 clib_host_to_net_u16 (IKEV2_PORT));
3589 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3590 nat_detection_sha1);
3591 vec_free (nat_detection_sha1);
3592 nat_detection_sha1 =
3593 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3594 clib_host_to_net_u64 (sa.rspi),
3595 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3596 clib_host_to_net_u16 (sa.dst_port));
3597 ikev2_payload_add_notify (chain,
3598 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3599 nat_detection_sha1);
3600 vec_free (nat_detection_sha1);
3602 u8 *sig_hash_algo = vec_new (u8, 8);
3603 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3604 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3605 ikev2_payload_add_notify (chain,
3606 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3608 vec_free (sig_hash_algo);
3611 /* Buffer update and boilerplate */
3612 len += vec_len (chain->data);
3613 ike0->nextpayload = chain->first_payload_type;
3614 ike0->length = clib_host_to_net_u32 (len);
3615 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3616 ikev2_payload_destroy_chain (chain);
3618 ike0->version = IKE_VERSION_2;
3619 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3620 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3621 ike0->ispi = sa.ispi;
3625 /* store whole IKE payload - needed for PSK auth */
3626 vec_free (sa.last_sa_init_req_packet_data);
3627 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3629 /* add data to the SA then add it to the pool */
3630 sa.iaddr.as_u32 = if_ip->as_u32;
3631 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3632 sa.i_id.type = p->loc_id.type;
3633 sa.i_id.data = vec_dup (p->loc_id.data);
3634 sa.i_auth.method = p->auth.method;
3635 sa.i_auth.hex = p->auth.hex;
3636 sa.i_auth.data = vec_dup (p->auth.data);
3637 sa.sw_if_index = p->responder.sw_if_index;
3638 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3639 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3641 ikev2_initial_contact_cleanup (&sa);
3643 /* add SA to the pool */
3644 ikev2_sa_t *sa0 = 0;
3645 pool_get (km->sais, sa0);
3646 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3647 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3649 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3650 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3652 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3653 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3654 p->responder.ip4.as_u32);
3661 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3662 ikev2_child_sa_t * csa)
3664 /* Create the Initiator notification for child SA removal */
3665 ikev2_main_t *km = &ikev2_main;
3670 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3673 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3674 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3675 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3676 vec_resize (sa->del, 1);
3677 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3678 sa->del->spi = csa->i_proposals->spi;
3679 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3680 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3681 len = ikev2_generate_message (sa, ike0, 0, 0);
3683 len = ikev2_insert_non_esp_marker (ike0, len);
3684 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3685 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3687 /* delete local child SA */
3688 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3689 ikev2_sa_del_child_sa (sa, csa);
3693 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3696 ikev2_main_t *km = &ikev2_main;
3697 ikev2_main_per_thread_data_t *tkm;
3698 ikev2_sa_t *fsa = 0;
3699 ikev2_child_sa_t *fchild = 0;
3701 /* Search for the child SA */
3702 vec_foreach (tkm, km->per_thread_data)
3708 pool_foreach (sa, tkm->sas, ({
3709 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3719 if (!fchild || !fsa)
3721 r = clib_error_return (0, "Child SA not found");
3726 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3733 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3736 ikev2_main_t *km = &ikev2_main;
3737 ikev2_main_per_thread_data_t *tkm;
3738 ikev2_sa_t *fsa = 0;
3739 ikev2_main_per_thread_data_t *ftkm = 0;
3741 /* Search for the IKE SA */
3742 vec_foreach (tkm, km->per_thread_data)
3748 pool_foreach (sa, tkm->sas, ({
3749 if (sa->ispi == ispi)
3761 r = clib_error_return (0, "IKE SA not found");
3766 /* Create the Initiator notification for IKE SA removal */
3772 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3775 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3776 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3777 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3778 vec_resize (fsa->del, 1);
3779 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3780 fsa->del->spi = ispi;
3781 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3782 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3783 len = ikev2_generate_message (fsa, ike0, 0, 0);
3785 len = ikev2_insert_non_esp_marker (ike0, len);
3786 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len,
3787 ikev2_get_port (fsa), fsa->dst_port, fsa->sw_if_index);
3791 /* delete local SA */
3792 ikev2_child_sa_t *c;
3793 vec_foreach (c, fsa->childs)
3795 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3796 ikev2_sa_del_child_sa (fsa, c);
3798 ikev2_sa_free_all_vec (fsa);
3799 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3802 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3803 pool_put (ftkm->sas, fsa);
3811 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3812 ikev2_child_sa_t * csa)
3814 /* Create the Initiator request for create child SA */
3820 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3823 ike0->version = IKE_VERSION_2;
3824 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3825 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3826 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3827 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3828 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3829 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3831 ikev2_rekey_t *rekey;
3832 vec_add2 (sa->rekey, rekey, 1);
3833 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3836 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3837 rekey->spi = proposals[0].spi;
3838 rekey->ispi = csa->i_proposals->spi;
3839 len = ikev2_generate_message (sa, ike0, proposals, 0);
3841 len = ikev2_insert_non_esp_marker (ike0, len);
3842 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3843 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3844 vec_free (proposals);
3848 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3851 ikev2_main_t *km = &ikev2_main;
3852 ikev2_main_per_thread_data_t *tkm;
3853 ikev2_sa_t *fsa = 0;
3854 ikev2_child_sa_t *fchild = 0;
3856 /* Search for the child SA */
3857 vec_foreach (tkm, km->per_thread_data)
3863 pool_foreach (sa, tkm->sas, ({
3864 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3874 if (!fchild || !fsa)
3876 r = clib_error_return (0, "Child SA not found");
3881 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3888 ikev2_init (vlib_main_t * vm)
3890 ikev2_main_t *km = &ikev2_main;
3891 vlib_thread_main_t *tm = vlib_get_thread_main ();
3894 clib_memset (km, 0, sizeof (ikev2_main_t));
3895 km->vnet_main = vnet_get_main ();
3898 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
3899 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
3900 ikev2_crypto_init (km);
3902 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3904 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3905 CLIB_CACHE_LINE_BYTES);
3906 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3908 km->per_thread_data[thread_id].sa_by_rspi =
3909 hash_create (0, sizeof (uword));
3912 km->sa_by_ispi = hash_create (0, sizeof (uword));
3913 km->sw_if_indices = hash_create (0, 0);
3914 km->udp_ports = hash_create (0, sizeof (uword));
3916 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
3917 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
3919 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
3920 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3922 ikev2_cli_reference ();
3924 km->log_level = IKEV2_LOG_ERROR;
3925 km->log_class = vlib_log_register_class ("ikev2", 0);
3930 VLIB_INIT_FUNCTION (ikev2_init) =
3932 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
3937 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
3940 ikev2_main_t *km = &ikev2_main;
3941 ikev2_profile_t *p = 0;
3942 vlib_main_t *vm = km->vlib_main;
3943 f64 now = vlib_time_now (vm);
3946 if (sa->is_profile_index_set)
3947 p = pool_elt_at_index (km->profiles, sa->profile_index);
3949 if (sa->is_initiator && p && csa->time_to_expiration
3950 && now > csa->time_to_expiration)
3952 if (!csa->is_expired || csa->rekey_retries > 0)
3954 ikev2_rekey_child_sa_internal (vm, sa, csa);
3955 csa->time_to_expiration = now + p->handover;
3956 csa->is_expired = 1;
3957 if (csa->rekey_retries == 0)
3959 csa->rekey_retries = 5;
3961 else if (csa->rekey_retries > 0)
3963 csa->rekey_retries--;
3964 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
3965 csa->i_proposals->spi, csa->rekey_retries);
3966 if (csa->rekey_retries == 0)
3968 csa->rekey_retries = -1;
3975 csa->time_to_expiration = 0;
3976 ikev2_delete_child_sa_internal (vm, sa, csa);
3983 ipip_tunnel_t *ipip = NULL;
3984 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
3985 if (~0 == sw_if_index)
3987 ip46_address_t local_ip;
3988 ip46_address_t remote_ip;
3989 if (sa->is_initiator)
3991 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
3992 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
3996 ip46_address_set_ip4 (&local_ip, &sa->raddr);
3997 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4001 ipip_tunnel_key_t key = {
4004 .transport = IPIP_TRANSPORT_IP4,
4009 ipip = ipip_tunnel_db_find (&key);
4012 sw_if_index = ipip->sw_if_index;
4018 vec_add1 (sas_in, csa->remote_sa_id);
4019 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4020 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4027 ikev2_set_log_level (ikev2_log_level_t log_level)
4029 ikev2_main_t *km = &ikev2_main;
4031 if (log_level >= IKEV2_LOG_MAX)
4033 ikev2_log_error ("unknown logging level %d", log_level);
4037 km->log_level = log_level;
4042 ikev2_set_liveness_params (u32 period, u32 max_retries)
4044 ikev2_main_t *km = &ikev2_main;
4046 if (period == 0 || max_retries == 0)
4047 return clib_error_return (0, "invalid args");
4049 km->liveness_period = period;
4050 km->liveness_max_retries = max_retries;
4055 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4057 ikev2_main_t *km = &ikev2_main;
4058 vlib_main_t *vm = km->vlib_main;
4059 ikev2_main_per_thread_data_t *tkm;
4060 ikev2_sa_t *fsa = 0;
4061 ikev2_profile_t *p = 0;
4062 ikev2_child_sa_t *fchild = 0;
4063 f64 now = vlib_time_now (vm);
4064 vlib_counter_t counts;
4066 /* Search for the SA and child SA */
4067 vec_foreach (tkm, km->per_thread_data)
4073 pool_foreach (sa, tkm->sas, ({
4074 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4083 vlib_get_combined_counter (&ipsec_sa_counters,
4084 ipsec_sa->stat_index, &counts);
4086 if (fsa && fsa->is_profile_index_set)
4087 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4089 if (fchild && p && p->lifetime_maxdata)
4091 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4093 fchild->time_to_expiration = now;
4099 ikev2_process_pending_sa_init (ikev2_main_t * km)
4106 hash_foreach (ispi, sai, km->sa_by_ispi,
4108 sa = pool_elt_at_index (km->sais, sai);
4109 if (sa->init_response_received)
4113 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4116 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4117 clib_memcpy_fast (vlib_buffer_get_current (b),
4118 sa->last_sa_init_req_packet_data,
4119 vec_len (sa->last_sa_init_req_packet_data));
4120 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4121 vec_len (sa->last_sa_init_req_packet_data),
4122 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4127 static vlib_node_registration_t ikev2_mngr_process_node;
4130 ikev2_send_informational_request (ikev2_sa_t * sa)
4132 ikev2_main_t *km = &ikev2_main;
4133 ip4_address_t *src, *dst;
4139 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4141 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4142 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4143 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4144 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4145 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4146 len = ikev2_generate_message (sa, ike0, 0, 0);
4148 len = ikev2_insert_non_esp_marker (ike0, len);
4150 if (sa->is_initiator)
4161 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4162 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4166 static_always_inline int
4167 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4169 ikev2_main_t *km = &ikev2_main;
4170 vlib_main_t *vm = km->vlib_main;
4172 if (!sa->sk_ai || !sa->sk_ar)
4175 if (sa->liveness_retries >= km->liveness_max_retries)
4178 f64 now = vlib_time_now (vm);
4180 if (sa->liveness_period_check < now)
4182 sa->liveness_retries++;
4183 sa->liveness_period_check = now + km->liveness_period;
4184 ikev2_send_informational_request (sa);
4190 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4193 ikev2_main_t *km = &ikev2_main;
4194 ipsec_main_t *im = &ipsec_main;
4196 ikev2_child_sa_t *c;
4202 vlib_process_wait_for_event_or_clock (vm, 1);
4203 vlib_process_get_events (vm, NULL);
4205 /* process ike child sas */
4206 ikev2_main_per_thread_data_t *tkm;
4207 vec_foreach (tkm, km->per_thread_data)
4210 u32 *to_be_deleted = 0;
4213 pool_foreach (sa, tkm->sas, ({
4214 ikev2_child_sa_t *c;
4216 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4218 sa->old_remote_id_present = 0;
4222 sa->old_id_expiration -= 1;
4224 vec_foreach (c, sa->childs)
4226 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4229 if (ikev2_mngr_process_responder_sas (sa))
4230 vec_add1 (to_be_deleted, sa - tkm->sas);
4234 vec_foreach (sai, to_be_deleted)
4236 sa = pool_elt_at_index (tkm->sas, sai[0]);
4237 u8 reinitiate = (sa->is_initiator && sa->is_profile_index_set);
4238 vec_foreach (c, sa->childs)
4240 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4241 ikev2_sa_del_child_sa (sa, c);
4243 ikev2_sa_free_all_vec (sa);
4244 hash_unset (tkm->sa_by_rspi, sa->rspi);
4245 pool_put (tkm->sas, sa);
4249 p = pool_elt_at_index (km->profiles, sa->profile_index);
4252 ikev2_initiate_sa_init (vm, p->name);
4256 vec_free (to_be_deleted);
4259 /* process ipsec sas */
4262 pool_foreach (sa, im->sad, ({
4263 ikev2_mngr_process_ipsec_sa(sa);
4267 ikev2_process_pending_sa_init (km);
4271 vlib_process_wait_for_event_or_clock (vm, 5);
4272 vlib_process_get_events (vm, NULL);
4281 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4282 .function = ikev2_mngr_process_fn,
4283 .type = VLIB_NODE_TYPE_PROCESS,
4285 "ikev2-manager-process",
4288 VLIB_PLUGIN_REGISTER () = {
4289 .version = VPP_BUILD_VER,
4290 .description = "Internet Key Exchange (IKEv2) Protocol",
4295 * fd.io coding-style-patch-verification: ON
4298 * eval: (c-set-style "gnu")