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") \
74 _(BAD_LENGTH, "Bad packet length")
78 #define _(sym,str) IKEV2_ERROR_##sym,
84 static char *ikev2_error_strings[] = {
85 #define _(sym,string) string,
92 IKEV2_NEXT_IP4_LOOKUP,
93 IKEV2_NEXT_ERROR_DROP,
97 typedef u32 ikev2_non_esp_marker;
99 static_always_inline u16
100 ikev2_get_port (ikev2_sa_t * sa)
102 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
105 static_always_inline int
106 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
108 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
109 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
110 return len + sizeof (ikev2_non_esp_marker);
113 static ikev2_sa_transform_t *
114 ikev2_find_transform_data (ikev2_sa_transform_t * t)
116 ikev2_main_t *km = &ikev2_main;
117 ikev2_sa_transform_t *td;
119 vec_foreach (td, km->supported_transforms)
121 if (td->type != t->type)
124 if (td->transform_id != t->transform_id)
127 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
129 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
130 || t->attrs[1] != 14)
133 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
141 static ikev2_sa_proposal_t *
142 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
143 ikev2_protocol_id_t prot_id)
145 ikev2_sa_proposal_t *rv = 0;
146 ikev2_sa_proposal_t *proposal;
147 ikev2_sa_transform_t *transform, *new_t;
148 u8 mandatory_bitmap, optional_bitmap;
150 if (prot_id == IKEV2_PROTOCOL_IKE)
152 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
153 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
154 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
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->r_id.type = sai->r_id.type;
410 sa->profile_index = sai->profile_index;
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->r_id.data = _(sai->r_id.data);
415 sa->i_auth.method = sai->i_auth.method;
416 sa->i_auth.hex = sai->i_auth.hex;
417 sa->i_auth.data = _(sai->i_auth.data);
418 sa->i_auth.key = _(sai->i_auth.key);
419 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
420 sa->childs = _(sai->childs);
421 sa->udp_encap = sai->udp_encap;
422 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
423 sa->dst_port = sai->dst_port;
424 sa->sw_if_index = sai->sw_if_index;
428 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
433 /* check if received DH group is on our list of supported groups */
434 vec_foreach (t2, km->supported_transforms)
436 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
445 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
450 /* generate dh keys */
451 ikev2_complete_dh (sa, t);
456 ikev2_calc_keys (ikev2_sa_t * sa)
459 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
462 u16 integ_key_len = 0, salt_len = 0;
463 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
465 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
467 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
469 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
472 integ_key_len = tr_integ->key_len;
474 salt_len = sizeof (u32);
476 vec_append (s, sa->i_nonce);
477 vec_append (s, sa->r_nonce);
478 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
480 /* Calculate S = Ni | Nr | SPIi | SPIr */
482 vec_add2 (s, tmp, 2 * sizeof (*spi));
484 spi[0] = clib_host_to_net_u64 (sa->ispi);
485 spi[1] = clib_host_to_net_u64 (sa->rspi);
487 /* calculate PRFplus */
489 int len = tr_prf->key_trunc + /* SK_d */
490 integ_key_len * 2 + /* SK_ai, SK_ar */
491 tr_encr->key_len * 2 + /* SK_ei, SK_er */
492 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
495 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
502 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
503 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
504 pos += tr_prf->key_trunc;
509 sa->sk_ai = vec_new (u8, integ_key_len);
510 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
511 pos += integ_key_len;
514 sa->sk_ar = vec_new (u8, integ_key_len);
515 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
516 pos += integ_key_len;
520 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
521 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
522 pos += tr_encr->key_len + salt_len;
525 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
526 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
527 pos += tr_encr->key_len + salt_len;
530 sa->sk_pi = vec_new (u8, tr_prf->key_len);
531 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
532 pos += tr_prf->key_len;
535 sa->sk_pr = vec_new (u8, tr_prf->key_len);
536 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
537 pos += tr_prf->key_len;
540 sa->keys_generated = 1;
544 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
547 u16 integ_key_len = 0;
550 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
552 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
554 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
556 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
559 integ_key_len = ctr_integ->key_len;
561 salt_len = sizeof (u32);
563 vec_append (s, sa->i_nonce);
564 vec_append (s, sa->r_nonce);
565 /* calculate PRFplus */
567 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
569 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
574 child->sk_ei = vec_new (u8, ctr_encr->key_len);
575 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
576 pos += ctr_encr->key_len;
581 child->sk_ai = vec_new (u8, ctr_integ->key_len);
582 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
583 pos += ctr_integ->key_len;
587 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
592 child->sk_er = vec_new (u8, ctr_encr->key_len);
593 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
594 pos += ctr_encr->key_len;
599 child->sk_ar = vec_new (u8, integ_key_len);
600 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
601 pos += integ_key_len;
605 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
614 static_always_inline u8 *
615 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
617 /* ispi, rspi, ip, port */
618 u8 buf[8 + 8 + 4 + 2];
619 u8 *res = vec_new (u8, 20);
621 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
622 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
623 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
624 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
625 SHA1 (buf, sizeof (buf), res);
630 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
631 ike_header_t * ike, udp_header_t * udp, u32 len)
634 u8 payload = ike->nextpayload;
636 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
638 clib_net_to_host_u64 (ike->ispi),
639 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
641 sa->ispi = clib_net_to_host_u64 (ike->ispi);
643 /* store whole IKE payload - needed for PSK auth */
644 vec_free (sa->last_sa_init_req_packet_data);
645 vec_add (sa->last_sa_init_req_packet_data, ike, len);
647 while (p < len && payload != IKEV2_PAYLOAD_NONE)
649 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
650 u32 plen = clib_net_to_host_u16 (ikep->length);
652 if (plen < sizeof (ike_payload_header_t))
655 if (payload == IKEV2_PAYLOAD_SA)
657 ikev2_sa_free_proposal_vector (&sa->i_proposals);
658 sa->i_proposals = ikev2_parse_sa_payload (ikep);
660 else if (payload == IKEV2_PAYLOAD_KE)
662 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
663 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
664 vec_free (sa->i_dh_data);
665 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
667 else if (payload == IKEV2_PAYLOAD_NONCE)
669 vec_free (sa->i_nonce);
670 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
672 else if (payload == IKEV2_PAYLOAD_NOTIFY)
674 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
675 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
678 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
679 clib_net_to_host_u32 (sa->
682 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
685 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
686 " behind NAT", sa->ispi);
690 else if (n->msg_type ==
691 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
694 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
695 clib_net_to_host_u32 (sa->
698 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
701 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
702 " (self) behind NAT", sa->ispi);
708 else if (payload == IKEV2_PAYLOAD_VENDOR)
710 ikev2_parse_vendor_payload (ikep);
714 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
716 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
718 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
719 sa->unsupported_cp = payload;
724 payload = ikep->nextpayload;
728 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
732 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
733 ike_header_t * ike, udp_header_t * udp, u32 len)
736 u8 payload = ike->nextpayload;
738 sa->ispi = clib_net_to_host_u64 (ike->ispi);
739 sa->rspi = clib_net_to_host_u64 (ike->rspi);
741 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
742 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
745 /* store whole IKE payload - needed for PSK auth */
746 vec_free (sa->last_sa_init_res_packet_data);
747 vec_add (sa->last_sa_init_res_packet_data, ike, len);
749 while (p < len && payload != IKEV2_PAYLOAD_NONE)
751 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
752 u32 plen = clib_net_to_host_u16 (ikep->length);
754 if (plen < sizeof (ike_payload_header_t))
757 if (payload == IKEV2_PAYLOAD_SA)
759 ikev2_sa_free_proposal_vector (&sa->r_proposals);
760 sa->r_proposals = ikev2_parse_sa_payload (ikep);
763 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
765 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
768 else if (payload == IKEV2_PAYLOAD_KE)
770 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
771 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
772 vec_free (sa->r_dh_data);
773 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
775 else if (payload == IKEV2_PAYLOAD_NONCE)
777 vec_free (sa->r_nonce);
778 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
780 else if (payload == IKEV2_PAYLOAD_NOTIFY)
782 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
783 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
785 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
790 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
792 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
793 " behind NAT, unsupported", sa->ispi);
797 else if (n->msg_type ==
798 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
800 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
804 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
807 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
808 " (self) behind NAT", sa->ispi);
814 else if (payload == IKEV2_PAYLOAD_VENDOR)
816 ikev2_parse_vendor_payload (ikep);
820 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
822 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
824 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
825 sa->unsupported_cp = payload;
830 payload = ikep->nextpayload;
836 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload,
839 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
841 u8 last_payload = 0, *plaintext = 0;
843 ike_payload_header_t *ikep = 0;
845 ikev2_sa_transform_t *tr_integ;
846 ikev2_sa_transform_t *tr_encr;
848 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
850 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
851 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
853 if ((!sa->sk_ar || !sa->sk_ai) && !is_aead)
857 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
859 ikep = (ike_payload_header_t *) & ike->payload[p];
860 plen = clib_net_to_host_u16 (ikep->length);
862 if (plen < sizeof (*ikep))
865 if (*payload == IKEV2_PAYLOAD_SK)
867 last_payload = *payload;
871 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
873 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
875 sa->unsupported_cp = *payload;
880 *payload = ikep->nextpayload;
884 if (last_payload != IKEV2_PAYLOAD_SK)
886 ikev2_elog_error ("Last payload must be SK");
892 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
895 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
896 u8 *aad = (u8 *) ike;
897 u32 aad_len = ikep->payload - aad;
898 u8 *tag = ikep->payload + plen;
900 plaintext = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
901 plen, aad, aad_len, tag);
905 if (len < tr_integ->key_trunc)
909 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
910 (u8 *) ike, len - tr_integ->key_trunc);
912 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
915 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
917 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
919 ikev2_elog_error ("message integrity check failed");
925 plaintext = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen);
931 static_always_inline int
932 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
934 if (i1->type != i2->type)
937 if (vec_len (i1->data) != vec_len (i2->data))
940 if (memcmp (i1->data, i2->data, vec_len (i1->data)))
947 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
949 ikev2_main_t *km = &ikev2_main;
953 u32 thread_index = vlib_get_thread_index ();
955 if (!sa->initial_contact)
958 /* find old IKE SAs with the same authenticated identity */
960 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
961 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
962 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
965 if (sa->rspi != tmp->rspi)
966 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
970 for (i = 0; i < vec_len (delete); i++)
973 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
975 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
977 ikev2_delete_sa (tmp);
981 sa->initial_contact = 0;
985 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike,
988 ikev2_child_sa_t *first_child_sa;
990 u8 payload = ike->nextpayload;
992 ike_payload_header_t *ikep;
995 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
996 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
997 clib_host_to_net_u64 (ike->rspi),
998 sa->is_initiator ? sa->raddr.as_u32 : sa->
1001 ikev2_calc_keys (sa);
1003 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1007 if (sa->unsupported_cp)
1008 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1009 goto cleanup_and_exit;
1012 /* select or create 1st child SA */
1013 if (sa->is_initiator)
1015 first_child_sa = &sa->childs[0];
1019 ikev2_sa_free_all_child_sa (&sa->childs);
1020 vec_add2 (sa->childs, first_child_sa, 1);
1024 /* process encrypted payload */
1026 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1028 ikep = (ike_payload_header_t *) & plaintext[p];
1029 plen = clib_net_to_host_u16 (ikep->length);
1031 if (plen < sizeof (ike_payload_header_t))
1032 goto cleanup_and_exit;
1034 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1036 if (sa->is_initiator)
1038 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1039 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
1043 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1044 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1047 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1049 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1051 sa->i_id.type = id->id_type;
1052 vec_free (sa->i_id.data);
1053 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1055 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1057 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1059 sa->r_id.type = id->id_type;
1060 vec_free (sa->r_id.data);
1061 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1063 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1065 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1067 if (sa->is_initiator)
1069 sa->r_auth.method = a->auth_method;
1070 vec_free (sa->r_auth.data);
1071 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1075 sa->i_auth.method = a->auth_method;
1076 vec_free (sa->i_auth.data);
1077 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1080 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1082 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1083 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1085 sa->initial_contact = 1;
1089 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1091 ikev2_parse_vendor_payload (ikep);
1093 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1095 vec_free (first_child_sa->tsi);
1096 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1098 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1100 vec_free (first_child_sa->tsr);
1101 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1105 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1108 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1110 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1111 sa->unsupported_cp = payload;
1116 payload = ikep->nextpayload;
1121 vec_free (plaintext);
1125 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1126 ike_header_t * ike, u32 len)
1129 u8 payload = ike->nextpayload;
1131 ike_payload_header_t *ikep;
1134 sa->liveness_retries = 0;
1135 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1136 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1137 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1139 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1142 goto cleanup_and_exit;
1144 /* process encrypted payload */
1146 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1148 ikep = (ike_payload_header_t *) & plaintext[p];
1149 plen = clib_net_to_host_u16 (ikep->length);
1151 if (plen < sizeof (ike_payload_header_t))
1152 goto cleanup_and_exit;
1154 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1156 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1157 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1158 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1161 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1163 sa->del = ikev2_parse_delete_payload (ikep);
1165 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1167 ikev2_parse_vendor_payload (ikep);
1171 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1173 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1175 sa->unsupported_cp = payload;
1180 payload = ikep->nextpayload;
1185 vec_free (plaintext);
1189 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1190 ike_header_t * ike, u32 len)
1193 u8 payload = ike->nextpayload;
1196 u8 nonce[IKEV2_NONCE_SIZE];
1198 ike_payload_header_t *ikep;
1200 ikev2_notify_t *n = 0;
1201 ikev2_ts_t *tsi = 0;
1202 ikev2_ts_t *tsr = 0;
1203 ikev2_sa_proposal_t *proposal = 0;
1204 ikev2_child_sa_t *child_sa;
1206 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1207 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1208 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1210 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1213 goto cleanup_and_exit;
1215 /* process encrypted payload */
1217 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1219 ikep = (ike_payload_header_t *) & plaintext[p];
1220 plen = clib_net_to_host_u16 (ikep->length);
1222 if (plen < sizeof (ike_payload_header_t))
1223 goto cleanup_and_exit;
1225 else if (payload == IKEV2_PAYLOAD_SA)
1227 proposal = ikev2_parse_sa_payload (ikep);
1229 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1231 n = ikev2_parse_notify_payload (ikep);
1232 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1237 else if (payload == IKEV2_PAYLOAD_DELETE)
1239 sa->del = ikev2_parse_delete_payload (ikep);
1241 else if (payload == IKEV2_PAYLOAD_VENDOR)
1243 ikev2_parse_vendor_payload (ikep);
1245 else if (payload == IKEV2_PAYLOAD_NONCE)
1247 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1249 else if (payload == IKEV2_PAYLOAD_TSI)
1251 tsi = ikev2_parse_ts_payload (ikep);
1253 else if (payload == IKEV2_PAYLOAD_TSR)
1255 tsr = ikev2_parse_ts_payload (ikep);
1259 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1261 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1263 sa->unsupported_cp = payload;
1264 goto cleanup_and_exit;
1268 payload = ikep->nextpayload;
1272 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1274 ikev2_rekey_t *rekey = &sa->rekey[0];
1275 rekey->protocol_id = proposal->protocol_id;
1277 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1278 rekey->i_proposal->spi = rekey->spi;
1279 rekey->r_proposal = proposal;
1283 vec_free (sa->r_nonce);
1284 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1285 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1288 child_sa->rekey_retries = 0;
1293 ikev2_rekey_t *rekey;
1294 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1297 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1299 goto cleanup_and_exit;
1301 vec_add2 (sa->rekey, rekey, 1);
1302 rekey->protocol_id = n->protocol_id;
1303 rekey->spi = n->spi;
1304 rekey->i_proposal = proposal;
1306 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1310 vec_free (sa->i_nonce);
1311 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1312 /* generate new Nr */
1313 vec_free (sa->r_nonce);
1314 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1315 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1319 vec_free (plaintext);
1324 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1332 ikev2_sa_transform_t *tr_prf;
1335 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1341 nonce = sa->i_nonce;
1342 packet_data = sa->last_sa_init_res_packet_data;
1348 nonce = sa->r_nonce;
1349 packet_data = sa->last_sa_init_req_packet_data;
1352 data = vec_new (u8, 4);
1354 vec_append (data, id->data);
1356 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1357 vec_append (authmsg, packet_data);
1358 vec_append (authmsg, nonce);
1359 vec_append (authmsg, id_hash);
1367 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1369 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1370 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1371 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1372 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1379 ikev2_sa_match_ts (ikev2_sa_t * sa)
1381 ikev2_main_t *km = &ikev2_main;
1383 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1384 ikev2_id_t *id_rem, *id_loc;
1387 pool_foreach (p, km->profiles, ({
1389 if (sa->is_initiator)
1405 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1406 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1409 sa->profile_index = p - km->profiles;
1411 vec_foreach(ts, sa->childs[0].tsi)
1413 if (ikev2_ts_cmp(p_tsi, ts))
1415 vec_add1 (tsi, ts[0]);
1420 vec_foreach(ts, sa->childs[0].tsr)
1422 if (ikev2_ts_cmp(p_tsr, ts))
1424 vec_add1 (tsr, ts[0]);
1435 vec_free (sa->childs[0].tsi);
1436 vec_free (sa->childs[0].tsr);
1437 sa->childs[0].tsi = tsi;
1438 sa->childs[0].tsr = tsr;
1444 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1449 ikev2_sa_auth (ikev2_sa_t * sa)
1451 ikev2_main_t *km = &ikev2_main;
1452 ikev2_profile_t *p, *sel_p = 0;
1453 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1454 ikev2_sa_transform_t *tr_prf;
1457 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1459 /* only shared key and rsa signature */
1460 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1461 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1463 ikev2_elog_uint (IKEV2_LOG_ERROR,
1464 "unsupported authentication method %u",
1466 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1470 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1471 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1473 ikev2_id_t *id_rem, *id_loc;
1474 ikev2_auth_t *sa_auth;
1476 if (sa->is_initiator)
1480 sa_auth = &sa->r_auth;
1486 sa_auth = &sa->i_auth;
1490 pool_foreach (p, km->profiles, ({
1493 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1494 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1497 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1499 if (!p->auth.data ||
1500 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1503 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1504 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1506 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1508 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1515 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1517 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1520 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1522 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1535 sa->udp_encap = sel_p->udp_encap;
1536 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1540 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1542 if (!sa->is_initiator)
1544 vec_free (sa->r_id.data);
1545 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1546 sa->r_id.type = sel_p->loc_id.type;
1547 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1548 sa->i_id.type = sel_p->rem_id.type;
1550 /* generate our auth data */
1551 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1552 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1554 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1555 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1557 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1559 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1560 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1564 /* select transforms for 1st child sa */
1565 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1566 sa->childs[0].r_proposals =
1567 ikev2_select_proposal (sa->childs[0].i_proposals,
1568 IKEV2_PROTOCOL_ESP);
1570 if (~0 != sel_p->tun_itf)
1572 sa->is_tun_itf_set = 1;
1573 sa->tun_itf = sel_p->tun_itf;
1579 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1580 "profile found! ispi %lx", sa->ispi);
1581 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1589 ikev2_sa_auth_init (ikev2_sa_t * sa)
1591 ikev2_main_t *km = &ikev2_main;
1592 u8 *authmsg, *key_pad, *psk = 0;
1593 ikev2_sa_transform_t *tr_prf;
1596 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1598 /* only shared key and rsa signature */
1599 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1600 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1602 ikev2_elog_uint (IKEV2_LOG_ERROR,
1603 "unsupported authentication method %u",
1605 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1609 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1610 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1611 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1613 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1615 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1616 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1618 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1620 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1621 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1630 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1632 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1636 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1638 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1648 ipsec_sa_flags_t flags;
1651 ipsec_crypto_alg_t encr_type;
1652 ipsec_integ_alg_t integ_type;
1653 ip46_address_t local_ip;
1654 ip46_address_t remote_ip;
1655 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1657 u32 old_remote_sa_id;
1658 u16 ipsec_over_udp_port;
1661 } ikev2_add_ipsec_tunnel_args_t;
1664 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1666 ikev2_main_t *km = &ikev2_main;
1670 if (~0 == a->sw_if_index)
1672 /* no tunnel associated with the SA/profile - create a new one */
1673 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1674 &a->local_ip, &a->remote_ip, 0,
1675 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1676 TUNNEL_MODE_P2P, &sw_if_index);
1678 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1680 if (hash_get (km->sw_if_indices, sw_if_index))
1681 /* interface is managed by IKE; proceed with updating SAs */
1684 hash_set1 (km->sw_if_indices, sw_if_index);
1688 sw_if_index = a->sw_if_index;
1689 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1694 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1695 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1696 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1701 vec_add1 (sas_in, a->remote_sa_id);
1704 ipsec_tun_protect_del (sw_if_index, NULL);
1706 /* replace local SA immediately */
1707 ipsec_sa_unlock_id (a->local_sa_id);
1709 /* keep the old sa */
1710 vec_add1 (sas_in, a->old_remote_sa_id);
1713 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1715 IPSEC_PROTOCOL_ESP, a->encr_type,
1716 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1717 a->flags, 0, a->salt_local, &a->local_ip,
1718 &a->remote_ip, NULL, a->src_port, a->dst_port);
1719 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1720 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1721 a->integ_type, &a->rem_ikey,
1722 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1723 a->salt_remote, &a->remote_ip,
1724 &a->local_ip, NULL, a->ipsec_over_udp_port,
1725 a->ipsec_over_udp_port);
1727 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1731 ikev2_create_tunnel_interface (vlib_main_t * vm,
1734 ikev2_child_sa_t * child, u32 sa_index,
1735 u32 child_index, u8 is_rekey)
1737 ikev2_main_t *km = &ikev2_main;
1738 ipsec_crypto_alg_t encr_type;
1739 ipsec_integ_alg_t integ_type;
1740 ikev2_profile_t *p = 0;
1741 ikev2_sa_transform_t *tr;
1742 ikev2_sa_proposal_t *proposals;
1744 ikev2_add_ipsec_tunnel_args_t a;
1746 clib_memset (&a, 0, sizeof (a));
1748 if (!child->r_proposals)
1750 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1754 if (sa->is_initiator)
1756 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1757 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1758 proposals = child->r_proposals;
1759 a.local_spi = child->r_proposals[0].spi;
1760 a.remote_spi = child->i_proposals[0].spi;
1764 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1765 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1766 proposals = child->i_proposals;
1767 a.local_spi = child->i_proposals[0].spi;
1768 a.remote_spi = child->r_proposals[0].spi;
1771 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1774 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1775 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1778 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1779 a.is_rekey = is_rekey;
1781 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1782 if (tr && tr->esn_type)
1783 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1785 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1788 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1790 switch (tr->key_len)
1793 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1796 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1799 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1802 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1807 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1810 switch (tr->key_len)
1813 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1816 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1819 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1822 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1830 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1836 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1839 a.encr_type = encr_type;
1843 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1846 switch (tr->integ_type)
1848 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1849 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1851 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1852 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1854 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1855 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1857 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1858 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1861 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1867 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1873 integ_type = IPSEC_INTEG_ALG_NONE;
1876 a.integ_type = integ_type;
1877 ikev2_calc_child_keys (sa, child);
1879 if (sa->is_initiator)
1881 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1882 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1883 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1884 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1887 a.salt_remote = child->salt_er;
1888 a.salt_local = child->salt_ei;
1890 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1894 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1895 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1896 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1897 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1900 a.salt_remote = child->salt_ei;
1901 a.salt_local = child->salt_er;
1903 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1904 a.src_port = sa->ipsec_over_udp_port;
1907 if (sa->is_initiator && sa->profile_index != ~0)
1908 p = pool_elt_at_index (km->profiles, sa->profile_index);
1910 if (p && p->lifetime)
1912 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1913 if (p->lifetime_jitter)
1915 // This is not much better than rand(3), which Coverity warns
1916 // is unsuitable for security applications; random_u32 is
1917 // however fast. If this perturbance to the expiration time
1918 // needs to use a better RNG then we may need to use something
1919 // like /dev/urandom which has significant overhead.
1920 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1921 rnd = random_u32 (&rnd);
1923 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1927 if (thread_index & 0xffffffc0)
1928 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1930 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1931 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1933 child->local_sa_id =
1935 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1937 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1942 /* create a new remote SA ID to keep the old SA for a bit longer
1943 * so the peer has some time to swap their SAs */
1945 /* use most significat bit of child index part in id */
1947 if (sa->current_remote_id_mask)
1949 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1950 sa->current_remote_id_mask = 0;
1954 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1955 sa->current_remote_id_mask = mask;
1956 remote_sa_id |= mask;
1958 sa->old_id_expiration = 3.0;
1959 sa->old_remote_id_present = 1;
1962 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1964 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1965 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1967 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1968 (u8 *) & a, sizeof (a));
1974 ip46_address_t local_ip;
1975 ip46_address_t remote_ip;
1979 } ikev2_del_ipsec_tunnel_args_t;
1981 static_always_inline u32
1982 ikev2_flip_alternate_sa_bit (u32 id)
1991 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1993 ikev2_main_t *km = &ikev2_main;
1994 ipip_tunnel_t *ipip = NULL;
1997 if (~0 == a->sw_if_index)
2000 ipip_tunnel_key_t key = {
2002 .dst = a->remote_ip,
2003 .transport = IPIP_TRANSPORT_IP4,
2008 ipip = ipip_tunnel_db_find (&key);
2012 sw_if_index = ipip->sw_if_index;
2013 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2020 sw_if_index = a->sw_if_index;
2021 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2024 if (~0 != sw_if_index)
2025 ipsec_tun_protect_del (sw_if_index, NULL);
2027 ipsec_sa_unlock_id (a->remote_sa_id);
2028 ipsec_sa_unlock_id (a->local_sa_id);
2029 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2032 ipip_del_tunnel (ipip->sw_if_index);
2036 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2037 ikev2_child_sa_t * child)
2039 ikev2_del_ipsec_tunnel_args_t a;
2041 clib_memset (&a, 0, sizeof (a));
2043 if (sa->is_initiator)
2045 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2046 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2050 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2051 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2054 a.remote_sa_id = child->remote_sa_id;
2055 a.local_sa_id = child->local_sa_id;
2056 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2058 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2064 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2068 ike_payload_header_t *ph;
2072 ikev2_sa_transform_t *tr_encr, *tr_integ;
2074 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2076 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2078 ikev2_payload_chain_t *chain = 0;
2079 ikev2_payload_new_chain (chain);
2081 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2083 if (sa->r_proposals == 0)
2085 ikev2_payload_add_notify (chain,
2086 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2087 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2089 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2091 u8 *data = vec_new (u8, 2);
2092 ikev2_sa_transform_t *tr_dh;
2094 ikev2_sa_get_td_for_type (sa->r_proposals,
2095 IKEV2_TRANSFORM_TYPE_DH);
2096 ASSERT (tr_dh && tr_dh->dh_type);
2098 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2099 data[1] = (tr_dh->dh_type) & 0xff;
2101 ikev2_payload_add_notify (chain,
2102 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2105 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2107 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2109 u8 *data = vec_new (u8, 1);
2111 data[0] = sa->unsupported_cp;
2112 ikev2_payload_add_notify (chain,
2113 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2121 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2122 ikev2_payload_add_sa (chain, sa->r_proposals);
2123 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2124 ikev2_payload_add_nonce (chain, sa->r_nonce);
2126 u8 *nat_detection_sha1 =
2127 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2128 clib_host_to_net_u64 (sa->rspi),
2129 clib_host_to_net_u32 (sa->raddr.as_u32),
2131 ikev2_payload_add_notify (chain,
2132 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2133 nat_detection_sha1);
2134 vec_free (nat_detection_sha1);
2135 nat_detection_sha1 =
2136 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2137 clib_host_to_net_u64 (sa->rspi),
2138 sa->iaddr.as_u32, udp->src_port);
2139 ikev2_payload_add_notify (chain,
2140 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2141 nat_detection_sha1);
2142 vec_free (nat_detection_sha1);
2145 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2147 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2149 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2150 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2151 ikev2_payload_add_auth (chain, &sa->r_auth);
2152 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2153 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2154 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2156 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2158 ikev2_payload_add_notify (chain,
2159 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2161 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2163 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2165 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2167 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2168 ikev2_payload_add_auth (chain, &sa->r_auth);
2170 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2172 ikev2_payload_add_notify (chain,
2173 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2174 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2175 ikev2_payload_add_auth (chain, &sa->r_auth);
2176 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2177 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2179 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2181 u8 *data = vec_new (u8, 1);
2183 data[0] = sa->unsupported_cp;
2184 ikev2_payload_add_notify (chain,
2185 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2189 else if (sa->state == IKEV2_STATE_SA_INIT)
2191 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2192 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2193 ikev2_payload_add_auth (chain, &sa->i_auth);
2194 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2195 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2196 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2197 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2202 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2206 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2208 /* if pending delete */
2211 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2213 if (sa->is_initiator)
2214 ikev2_payload_add_delete (chain, sa->del);
2216 /* The response to a request that deletes the IKE SA is an empty
2217 INFORMATIONAL response. */
2218 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2220 /* The response to a request that deletes ESP or AH SAs will contain
2221 delete payloads for the paired SAs going in the other direction. */
2224 ikev2_payload_add_delete (chain, sa->del);
2229 /* received N(AUTHENTICATION_FAILED) */
2230 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2232 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2235 /* received unsupported critical payload */
2236 else if (sa->unsupported_cp)
2238 u8 *data = vec_new (u8, 1);
2240 data[0] = sa->unsupported_cp;
2241 ikev2_payload_add_notify (chain,
2242 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2245 sa->unsupported_cp = 0;
2247 /* else send empty response */
2249 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2251 if (sa->is_initiator)
2254 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2255 ikev2_notify_t notify;
2256 u8 *data = vec_new (u8, 4);
2257 clib_memset (¬ify, 0, sizeof (notify));
2258 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2259 notify.spi = sa->childs[0].i_proposals->spi;
2260 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2262 ikev2_payload_add_sa (chain, proposals);
2263 ikev2_payload_add_nonce (chain, sa->i_nonce);
2264 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2265 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2266 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2273 if (vec_len (sa->rekey) > 0)
2275 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2276 ikev2_payload_add_nonce (chain, sa->r_nonce);
2277 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2279 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2281 vec_del1 (sa->rekey, 0);
2283 else if (sa->unsupported_cp)
2285 u8 *data = vec_new (u8, 1);
2287 data[0] = sa->unsupported_cp;
2288 ikev2_payload_add_notify (chain,
2289 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2292 sa->unsupported_cp = 0;
2296 ikev2_payload_add_notify (chain,
2297 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2304 ike->version = IKE_VERSION_2;
2305 ike->nextpayload = IKEV2_PAYLOAD_SK;
2306 tlen = sizeof (*ike);
2307 if (sa->is_initiator)
2309 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2310 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2314 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2318 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2320 tlen += vec_len (chain->data);
2321 ike->nextpayload = chain->first_payload_type;
2322 ike->length = clib_host_to_net_u32 (tlen);
2323 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2325 /* store whole IKE payload - needed for PSK auth */
2326 vec_free (sa->last_sa_init_res_packet_data);
2327 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2331 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2332 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2335 plen = sizeof (*ph);
2336 ph = (ike_payload_header_t *) & ike->payload[0];
2337 ph->nextpayload = chain->first_payload_type;
2340 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2341 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2342 plen += vec_len (chain->data) + iv_len;
2344 /* add space for hmac/tag */
2346 plen += tr_integ->key_trunc;
2348 plen += IKEV2_GCM_ICV_SIZE;
2351 /* payload and total length */
2352 ph->length = clib_host_to_net_u16 (plen);
2353 ike->length = clib_host_to_net_u32 (tlen);
2357 ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2358 ph->payload, (u8 *) ike,
2359 sizeof (*ike) + sizeof (*ph),
2360 ph->payload + plen - sizeof (*ph) -
2361 IKEV2_GCM_ICV_SIZE);
2365 ikev2_encrypt_data (ptd, sa, tr_encr, chain->data, ph->payload);
2367 ikev2_calc_integr (tr_integ,
2368 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2369 (u8 *) ike, tlen - tr_integ->key_trunc);
2370 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2371 sizeof (*ike), integ, tr_integ->key_trunc);
2374 /* store whole IKE payload - needed for retransmit */
2375 vec_free (sa->last_res_packet_data);
2376 vec_add (sa->last_res_packet_data, ike, tlen);
2380 ikev2_payload_destroy_chain (chain);
2386 ikev2_retransmit_sa_init (ike_header_t * ike,
2387 ip4_address_t iaddr, ip4_address_t raddr, u32 rlen)
2389 ikev2_main_t *km = &ikev2_main;
2391 u32 thread_index = vlib_get_thread_index ();
2394 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2395 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2396 sa->iaddr.as_u32 == iaddr.as_u32 &&
2397 sa->raddr.as_u32 == raddr.as_u32)
2400 u8 payload = ike->nextpayload;
2402 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2403 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2404 u32 plen = clib_net_to_host_u16(ikep->length);
2406 if (plen < sizeof(ike_payload_header_t))
2409 if (payload == IKEV2_PAYLOAD_NONCE)
2411 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2413 /* req is retransmit */
2414 if (sa->state == IKEV2_STATE_SA_INIT)
2416 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2417 u32 slen = clib_net_to_host_u32(tmp->length);
2418 ike->ispi = tmp->ispi;
2419 ike->rspi = tmp->rspi;
2420 ike->nextpayload = tmp->nextpayload;
2421 ike->version = tmp->version;
2422 ike->exchange = tmp->exchange;
2423 ike->flags = tmp->flags;
2424 ike->msgid = tmp->msgid;
2425 ike->length = tmp->length;
2426 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2427 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2428 "ispi %lx IKE_SA_INIT retransmit "
2429 "from %d.%d.%d.%d to %d.%d.%d.%d",
2431 raddr.as_u32, iaddr.as_u32);
2434 /* else ignore req */
2437 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2438 "ispi %lx IKE_SA_INIT ignore "
2439 "from %d.%d.%d.%d to %d.%d.%d.%d",
2441 raddr.as_u32, iaddr.as_u32);
2446 payload = ikep->nextpayload;
2453 /* req is not retransmit */
2458 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike, u32 rlen)
2460 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2463 if (msg_id > sa->last_msg_id)
2465 sa->last_msg_id = msg_id;
2469 /* retransmitted req */
2470 if (msg_id == sa->last_msg_id)
2472 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2473 u32 slen = clib_net_to_host_u32 (tmp->length);
2474 ike->ispi = tmp->ispi;
2475 ike->rspi = tmp->rspi;
2476 ike->nextpayload = tmp->nextpayload;
2477 ike->version = tmp->version;
2478 ike->exchange = tmp->exchange;
2479 ike->flags = tmp->flags;
2480 ike->msgid = tmp->msgid;
2481 ike->length = tmp->length;
2482 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2483 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2484 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2488 /* old req ignore */
2489 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2490 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2495 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2497 ikev2_main_t *km = &ikev2_main;
2498 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2499 sa->profile_index = ~0;
2503 ikev2_del_sa_init_from_main (u64 * ispi)
2505 ikev2_main_t *km = &ikev2_main;
2506 uword *p = hash_get (km->sa_by_ispi, *ispi);
2509 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2510 hash_unset (km->sa_by_ispi, sai->ispi);
2511 ikev2_sa_free_all_vec (sai);
2512 pool_put (km->sais, sai);
2517 ikev2_del_sa_init (u64 ispi)
2519 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2524 ikev2_node_fn (vlib_main_t * vm,
2525 vlib_node_runtime_t * node, vlib_frame_t * frame)
2527 u32 n_left_from, *from, *to_next;
2528 ikev2_next_t next_index;
2529 ikev2_main_t *km = &ikev2_main;
2530 u32 thread_index = vlib_get_thread_index ();
2532 from = vlib_frame_vector_args (frame);
2533 n_left_from = frame->n_vectors;
2534 next_index = node->cached_next_index;
2536 while (n_left_from > 0)
2540 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2542 while (n_left_from > 0 && n_left_to_next > 0)
2546 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2551 ikev2_sa_t *sa0 = 0;
2552 ikev2_sa_t sa; /* temporary store for SA */
2554 int is_req = 0, has_non_esp_marker = 0;
2556 /* speculatively enqueue b0 to the current next frame */
2562 n_left_to_next -= 1;
2564 b0 = vlib_get_buffer (vm, bi0);
2566 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2568 u8 *ptr = vlib_buffer_get_current (b0);
2569 ip40 = (ip4_header_t *) ptr;
2570 ptr += sizeof (*ip40);
2571 udp0 = (udp_header_t *) ptr;
2572 ptr += sizeof (*udp0);
2573 ike0 = (ike_header_t *) ptr;
2577 ike0 = vlib_buffer_get_current (b0);
2578 vlib_buffer_advance (b0, -sizeof (*udp0));
2579 udp0 = vlib_buffer_get_current (b0);
2580 vlib_buffer_advance (b0, -sizeof (*ip40));
2581 ip40 = vlib_buffer_get_current (b0);
2584 rlen = b0->current_length - sizeof (*ip40) - sizeof (*udp0);
2586 /* check for non-esp marker */
2587 if (*((u32 *) ike0) == 0)
2590 (ike_header_t *) ((u8 *) ike0 +
2591 sizeof (ikev2_non_esp_marker));
2592 rlen -= sizeof (ikev2_non_esp_marker);
2593 has_non_esp_marker = 1;
2596 if (clib_net_to_host_u32 (ike0->length) != rlen)
2598 vlib_node_increment_counter (vm, ikev2_node.index,
2599 IKEV2_ERROR_BAD_LENGTH, 1);
2603 if (ike0->version != IKE_VERSION_2)
2605 vlib_node_increment_counter (vm, ikev2_node.index,
2606 IKEV2_ERROR_NOT_IKEV2, 1);
2610 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2613 clib_memset (sa0, 0, sizeof (*sa0));
2615 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2617 if (ike0->rspi == 0)
2619 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2620 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2621 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2624 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2628 vlib_node_increment_counter (vm, ikev2_node.index,
2631 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2633 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2638 ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2640 if (sa0->state == IKEV2_STATE_SA_INIT)
2642 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2644 ikev2_select_proposal (sa0->i_proposals,
2645 IKEV2_PROTOCOL_IKE);
2646 ikev2_generate_sa_init_data (sa0);
2649 if (sa0->state == IKEV2_STATE_SA_INIT
2650 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2652 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2655 if (sa0->state == IKEV2_STATE_SA_INIT)
2657 /* add SA to the pool */
2658 pool_get (km->per_thread_data[thread_index].sas,
2660 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2661 ikev2_init_sa (vm, sa0);
2663 per_thread_data[thread_index].sa_by_rspi,
2666 km->per_thread_data[thread_index].sas);
2670 ikev2_sa_free_all_vec (sa0);
2674 else //received sa_init without initiator flag
2676 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2677 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2678 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2680 if (sa0->state == IKEV2_STATE_SA_INIT)
2683 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2684 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2688 pool_elt_at_index (km->sais, p[0]);
2690 if (clib_atomic_bool_cmp_and_swap
2691 (&sai->init_response_received, 0, 1))
2693 ikev2_complete_sa_data (sa0, sai);
2694 ikev2_calc_keys (sa0);
2695 ikev2_sa_auth_init (sa0);
2697 ikev2_generate_message (sa0, ike0, 0, udp0);
2701 /* we've already processed sa-init response */
2702 sa0->state = IKEV2_STATE_UNKNOWN;
2707 if (sa0->state == IKEV2_STATE_SA_INIT)
2709 /* add SA to the pool */
2710 pool_get (km->per_thread_data[thread_index].sas, sa0);
2711 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2712 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2714 sa0 - km->per_thread_data[thread_index].sas);
2718 ikev2_sa_free_all_vec (sa0);
2722 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2725 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2726 clib_net_to_host_u64 (ike0->rspi));
2730 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2733 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2736 vlib_node_increment_counter (vm, ikev2_node.index,
2739 IKEV2_ERROR_IKE_REQ_IGNORE
2741 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2746 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2747 ikev2_process_auth_req (vm, sa0, ike0, rlen);
2748 ikev2_sa_auth (sa0);
2749 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2751 ikev2_initial_contact_cleanup (sa0);
2752 ikev2_sa_match_ts (sa0);
2753 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2754 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2759 if (sa0->is_initiator)
2761 ikev2_del_sa_init (ike0->ispi);
2765 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2769 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2772 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2773 clib_net_to_host_u64 (ike0->rspi));
2777 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2780 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2783 vlib_node_increment_counter (vm, ikev2_node.index,
2786 IKEV2_ERROR_IKE_REQ_IGNORE
2788 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2793 ikev2_process_informational_req (vm, sa0, ike0, rlen);
2796 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2798 ikev2_delete_t *d, *tmp, *resp = 0;
2799 vec_foreach (d, sa0->del)
2801 ikev2_child_sa_t *ch_sa;
2802 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2804 !sa0->is_initiator);
2807 ikev2_delete_tunnel_interface (km->vnet_main,
2809 if (!sa0->is_initiator)
2811 vec_add2 (resp, tmp, 1);
2812 tmp->protocol_id = d->protocol_id;
2813 tmp->spi = ch_sa->r_proposals[0].spi;
2815 ikev2_sa_del_child_sa (sa0, ch_sa);
2818 if (!sa0->is_initiator)
2820 vec_free (sa0->del);
2825 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2827 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2828 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2832 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2835 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2836 clib_net_to_host_u64 (ike0->rspi));
2840 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2843 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2846 vlib_node_increment_counter (vm, ikev2_node.index,
2849 IKEV2_ERROR_IKE_REQ_IGNORE
2851 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2856 ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
2859 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2862 ikev2_sa_free_all_child_sa (&sa0->childs);
2863 ikev2_child_sa_t *child;
2864 vec_add2 (sa0->childs, child, 1);
2865 clib_memset (child, 0, sizeof (*child));
2866 child->r_proposals = sa0->rekey[0].r_proposal;
2867 child->i_proposals = sa0->rekey[0].i_proposal;
2868 child->tsi = sa0->rekey[0].tsi;
2869 child->tsr = sa0->rekey[0].tsr;
2870 ikev2_create_tunnel_interface (vm, thread_index,
2872 child - sa0->childs,
2875 if (sa0->is_initiator)
2877 vec_free (sa0->rekey);
2881 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2888 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2889 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2891 ip40->src_address.as_u32,
2892 ip40->dst_address.as_u32);
2896 /* if we are sending packet back, rewrite headers */
2897 if (slen && ~0 != slen)
2899 next0 = IKEV2_NEXT_IP4_LOOKUP;
2900 if (sa0->is_initiator)
2902 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2903 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2907 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2908 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2913 udp0->dst_port = udp0->src_port =
2914 clib_net_to_host_u16 (ikev2_get_port (sa0));
2916 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2919 if (!has_non_esp_marker)
2920 slen = ikev2_insert_non_esp_marker (ike0, slen);
2925 if (has_non_esp_marker)
2926 slen += sizeof (ikev2_non_esp_marker);
2928 u16 tp = udp0->dst_port;
2929 udp0->dst_port = udp0->src_port;
2930 udp0->src_port = tp;
2934 clib_host_to_net_u16 (slen + sizeof (udp_header_t));
2936 b0->current_length =
2937 slen + sizeof (ip4_header_t) + sizeof (udp_header_t);
2938 ip40->length = clib_host_to_net_u16 (b0->current_length);
2939 ip40->checksum = ip4_header_checksum (ip40);
2942 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2943 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2945 ikev2_child_sa_t *c;
2947 vec_foreach (c, sa0->childs)
2948 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2950 ikev2_delete_sa (sa0);
2952 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2954 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2955 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2957 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2958 t->sw_if_index = sw_if_index0;
2959 t->next_index = next0;
2962 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2963 n_left_to_next, bi0, next0);
2966 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2969 vlib_node_increment_counter (vm, ikev2_node.index,
2970 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2971 return frame->n_vectors;
2975 VLIB_REGISTER_NODE (ikev2_node,static) = {
2976 .function = ikev2_node_fn,
2978 .vector_size = sizeof (u32),
2979 .format_trace = format_ikev2_trace,
2980 .type = VLIB_NODE_TYPE_INTERNAL,
2982 .n_errors = ARRAY_LEN(ikev2_error_strings),
2983 .error_strings = ikev2_error_strings,
2985 .n_next_nodes = IKEV2_N_NEXT,
2988 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2989 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2994 // set ikev2 proposals when vpp is used as initiator
2995 static clib_error_t *
2996 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2997 ikev2_transforms_set * ts,
2998 ikev2_sa_proposal_t ** proposals, int is_ike)
3001 ikev2_main_t *km = &ikev2_main;
3002 ikev2_sa_proposal_t *proposal;
3003 vec_add2 (*proposals, proposal, 1);
3004 ikev2_sa_transform_t *td;
3009 vec_foreach (td, km->supported_transforms)
3011 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3012 && td->encr_type == ts->crypto_alg
3013 && td->key_len == ts->crypto_key_size / 8)
3016 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3017 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3018 vec_add (td->attrs, (u8 *) attr, 4);
3019 vec_add1 (proposal->transforms, *td);
3028 r = clib_error_return (0, "Unsupported algorithm");
3032 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3036 vec_foreach (td, km->supported_transforms)
3038 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3039 && td->integ_type == ts->integ_alg)
3041 vec_add1 (proposal->transforms, *td);
3049 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3050 r = clib_error_return (0, "Unsupported algorithm");
3059 vec_foreach (td, km->supported_transforms)
3061 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3062 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3064 vec_add1 (proposal->transforms, *td);
3071 r = clib_error_return (0, "Unsupported algorithm");
3080 vec_foreach (td, km->supported_transforms)
3082 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3084 vec_add1 (proposal->transforms, *td);
3087 sa->dh_group = td->dh_type;
3095 r = clib_error_return (0, "Unsupported algorithm");
3103 vec_foreach (td, km->supported_transforms)
3105 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3107 vec_add1 (proposal->transforms, *td);
3113 r = clib_error_return (0, "Unsupported algorithm");
3122 static ikev2_profile_t *
3123 ikev2_profile_index_by_name (u8 * name)
3125 ikev2_main_t *km = &ikev2_main;
3128 p = mhash_get (&km->profile_index_by_name, name);
3132 return pool_elt_at_index (km->profiles, p[0]);
3137 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3138 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3146 b0 = vlib_get_buffer (vm, bi0);
3147 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3148 udp0 = vlib_buffer_get_current (b0);
3149 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3150 ip40 = vlib_buffer_get_current (b0);
3153 ip40->ip_version_and_header_length = 0x45;
3155 ip40->fragment_id = 0;
3156 ip40->flags_and_fragment_offset = 0;
3158 ip40->protocol = IP_PROTOCOL_UDP;
3159 ip40->dst_address.as_u32 = dst->as_u32;
3160 ip40->src_address.as_u32 = src->as_u32;
3161 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3162 udp0->src_port = clib_host_to_net_u16 (src_port);
3163 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3165 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3166 ip40->length = clib_host_to_net_u16 (b0->current_length);
3167 ip40->checksum = ip4_header_checksum (ip40);
3169 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3170 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3172 /* send the request */
3173 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3174 to_next = vlib_frame_vector_args (f);
3177 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3182 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3185 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3190 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3191 *ike = vlib_buffer_get_current (b0);
3196 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3198 ikev2_main_t *km = &ikev2_main;
3200 km->pkey = ikev2_load_key_file (file);
3201 if (km->pkey == NULL)
3202 return clib_error_return (0, "load key '%s' failed", file);
3207 static_always_inline vnet_api_error_t
3208 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3210 ikev2_main_t *km = &ikev2_main;
3211 udp_dst_port_info_t *pi;
3213 uword *v = hash_get (km->udp_ports, port);
3214 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3218 /* IKE already uses this port, only increment reference counter */
3225 return VNET_API_ERROR_UDP_PORT_TAKEN;
3227 udp_register_dst_port (km->vlib_main, port,
3228 ipsec4_tun_input_node.index, 1);
3229 hash_set (km->udp_ports, port, 1);
3231 p->ipsec_over_udp_port = port;
3235 static_always_inline void
3236 ikev2_unregister_udp_port (ikev2_profile_t * p)
3238 ikev2_main_t *km = &ikev2_main;
3241 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3244 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3252 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3253 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3256 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3260 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3261 ikev2_main_per_thread_data_t * tkm,
3264 ikev2_main_t *km = &ikev2_main;
3265 ip4_address_t *src, *dst;
3267 /* Create the Initiator notification for IKE SA removal */
3272 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3275 ikev2_log_error ("buffer alloc failure");
3279 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3280 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3281 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3282 vec_resize (sa->del, 1);
3283 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3284 sa->del->spi = sa->ispi;
3285 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3286 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3287 len = ikev2_generate_message (sa, ike0, 0, 0);
3289 if (sa->is_initiator)
3300 ikev2_send_ike (vm, src, dst, bi0, len,
3301 ikev2_get_port (sa), sa->dst_port, 0);
3303 /* delete local SA */
3304 ikev2_child_sa_t *c;
3305 vec_foreach (c, sa->childs)
3306 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3308 u64 rspi = sa->rspi;
3309 ikev2_sa_free_all_vec (sa);
3310 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3313 hash_unset (tkm->sa_by_rspi, rspi);
3314 pool_put (tkm->sas, sa);
3319 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3321 ikev2_main_per_thread_data_t *tkm;
3323 u32 pi = p - km->profiles;
3327 vec_foreach (tkm, km->per_thread_data)
3330 pool_foreach (sa, tkm->sas, ({
3331 if (sa->profile_index != ~0 && pi == sa->profile_index)
3332 vec_add1 (del_sai, sa - tkm->sas);
3336 vec_foreach (sai, del_sai)
3338 sa = pool_elt_at_index (tkm->sas, sai[0]);
3339 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3342 vec_reset_length (del_sai);
3349 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3351 ikev2_main_t *km = &ikev2_main;
3356 if (ikev2_profile_index_by_name (name))
3357 return clib_error_return (0, "policy %v already exists", name);
3359 pool_get (km->profiles, p);
3360 clib_memset (p, 0, sizeof (*p));
3361 p->name = vec_dup (name);
3362 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3363 p->responder.sw_if_index = ~0;
3365 uword index = p - km->profiles;
3366 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3370 p = ikev2_profile_index_by_name (name);
3372 return clib_error_return (0, "policy %v does not exists", name);
3374 ikev2_unregister_udp_port (p);
3375 ikev2_cleanup_profile_sessions (km, p);
3378 pool_put (km->profiles, p);
3379 mhash_unset (&km->profile_index_by_name, name, 0);
3385 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3386 u8 * auth_data, u8 data_hex_format)
3391 p = ikev2_profile_index_by_name (name);
3395 r = clib_error_return (0, "unknown profile %v", name);
3398 vec_free (p->auth.data);
3399 p->auth.method = auth_method;
3400 p->auth.data = vec_dup (auth_data);
3401 p->auth.hex = data_hex_format;
3403 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3405 vec_add1 (p->auth.data, 0);
3407 EVP_PKEY_free (p->auth.key);
3408 p->auth.key = ikev2_load_cert_file (p->auth.data);
3409 if (p->auth.key == NULL)
3410 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3417 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3423 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3424 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3426 r = clib_error_return (0, "unsupported identity type %U",
3427 format_ikev2_id_type, id_type);
3431 p = ikev2_profile_index_by_name (name);
3435 r = clib_error_return (0, "unknown profile %v", name);
3441 vec_free (p->loc_id.data);
3442 p->loc_id.type = id_type;
3443 p->loc_id.data = vec_dup (data);
3447 vec_free (p->rem_id.data);
3448 p->rem_id.type = id_type;
3449 p->rem_id.data = vec_dup (data);
3456 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3457 u16 start_port, u16 end_port, ip4_address_t start_addr,
3458 ip4_address_t end_addr, int is_local)
3463 p = ikev2_profile_index_by_name (name);
3467 r = clib_error_return (0, "unknown profile %v", name);
3473 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3474 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3475 p->loc_ts.start_port = start_port;
3476 p->loc_ts.end_port = end_port;
3477 p->loc_ts.protocol_id = protocol_id;
3478 p->loc_ts.ts_type = 7;
3482 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3483 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3484 p->rem_ts.start_port = start_port;
3485 p->rem_ts.end_port = end_port;
3486 p->rem_ts.protocol_id = protocol_id;
3487 p->rem_ts.ts_type = 7;
3495 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3496 u32 sw_if_index, ip4_address_t ip4)
3501 p = ikev2_profile_index_by_name (name);
3505 r = clib_error_return (0, "unknown profile %v", name);
3509 p->responder.sw_if_index = sw_if_index;
3510 p->responder.ip4 = ip4;
3516 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3517 ikev2_transform_encr_type_t crypto_alg,
3518 ikev2_transform_integ_type_t integ_alg,
3519 ikev2_transform_dh_type_t dh_type,
3520 u32 crypto_key_size)
3525 p = ikev2_profile_index_by_name (name);
3529 r = clib_error_return (0, "unknown profile %v", name);
3533 p->ike_ts.crypto_alg = crypto_alg;
3534 p->ike_ts.integ_alg = integ_alg;
3535 p->ike_ts.dh_type = dh_type;
3536 p->ike_ts.crypto_key_size = crypto_key_size;
3541 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3542 ikev2_transform_encr_type_t crypto_alg,
3543 ikev2_transform_integ_type_t integ_alg,
3544 u32 crypto_key_size)
3549 p = ikev2_profile_index_by_name (name);
3553 r = clib_error_return (0, "unknown profile %v", name);
3557 p->esp_ts.crypto_alg = crypto_alg;
3558 p->esp_ts.integ_alg = integ_alg;
3559 p->esp_ts.crypto_key_size = crypto_key_size;
3564 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3565 u8 * name, u32 sw_if_index)
3570 p = ikev2_profile_index_by_name (name);
3574 r = clib_error_return (0, "unknown profile %v", name);
3578 p->tun_itf = sw_if_index;
3584 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3587 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3588 ikev2_main_t *km = &ikev2_main;
3589 vnet_api_error_t rv = 0;
3593 return VNET_API_ERROR_INVALID_VALUE;
3597 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3598 return VNET_API_ERROR_VALUE_EXIST;
3600 rv = ikev2_register_udp_port (p, port);
3604 v = hash_get (km->udp_ports, port);
3606 return VNET_API_ERROR_IKE_NO_PORT;
3608 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3609 return VNET_API_ERROR_INVALID_VALUE;
3611 ikev2_unregister_udp_port (p);
3617 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3619 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3624 r = clib_error_return (0, "unknown profile %v", name);
3633 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3634 u64 lifetime, u32 jitter, u32 handover,
3640 p = ikev2_profile_index_by_name (name);
3644 r = clib_error_return (0, "unknown profile %v", name);
3648 p->lifetime = lifetime;
3649 p->lifetime_jitter = jitter;
3650 p->handover = handover;
3651 p->lifetime_maxdata = maxdata;
3656 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3660 ip4_main_t *im = &ip4_main;
3661 ikev2_main_t *km = &ikev2_main;
3663 p = ikev2_profile_index_by_name (name);
3667 r = clib_error_return (0, "unknown profile %v", name);
3671 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3673 r = clib_error_return (0, "responder not set for profile %v", name);
3678 /* Create the Initiator Request */
3682 ip_lookup_main_t *lm = &im->lookup_main;
3684 int len = sizeof (ike_header_t);
3686 /* Get own iface IP */
3688 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3689 ip_interface_address_t *if_add =
3690 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3691 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3693 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3696 char *errmsg = "buffer alloc failure";
3697 ikev2_log_error (errmsg);
3698 return clib_error_return (0, errmsg);
3701 /* Prepare the SA and the IKE payload */
3703 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3704 ikev2_payload_chain_t *chain = 0;
3705 ikev2_payload_new_chain (chain);
3707 /* Build the IKE proposal payload */
3708 ikev2_sa_proposal_t *proposals = 0;
3709 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3710 proposals[0].proposal_num = 1;
3711 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3713 /* Add and then cleanup proposal data */
3714 ikev2_payload_add_sa (chain, proposals);
3715 ikev2_sa_free_proposal_vector (&proposals);
3717 sa.is_initiator = 1;
3718 sa.profile_index = p - km->profiles;
3719 sa.state = IKEV2_STATE_SA_INIT;
3720 sa.tun_itf = p->tun_itf;
3721 sa.udp_encap = p->udp_encap;
3722 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3723 sa.is_tun_itf_set = 1;
3724 sa.initial_contact = 1;
3725 sa.dst_port = IKEV2_PORT;
3726 ikev2_generate_sa_init_data (&sa);
3727 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3728 ikev2_payload_add_nonce (chain, sa.i_nonce);
3730 /* Build the child SA proposal */
3731 vec_resize (sa.childs, 1);
3732 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3733 &sa.childs[0].i_proposals, 0);
3734 sa.childs[0].i_proposals[0].proposal_num = 1;
3735 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3736 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3737 sizeof (sa.childs[0].i_proposals[0].spi));
3739 /* Add NAT detection notification messages (mandatory) */
3740 u8 *nat_detection_sha1 =
3741 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3742 clib_host_to_net_u64 (sa.rspi),
3743 clib_host_to_net_u32 (if_ip->as_u32),
3744 clib_host_to_net_u16 (IKEV2_PORT));
3746 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3747 nat_detection_sha1);
3748 vec_free (nat_detection_sha1);
3749 nat_detection_sha1 =
3750 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3751 clib_host_to_net_u64 (sa.rspi),
3752 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3753 clib_host_to_net_u16 (sa.dst_port));
3754 ikev2_payload_add_notify (chain,
3755 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3756 nat_detection_sha1);
3757 vec_free (nat_detection_sha1);
3759 u8 *sig_hash_algo = vec_new (u8, 8);
3760 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3761 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3762 ikev2_payload_add_notify (chain,
3763 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3765 vec_free (sig_hash_algo);
3768 /* Buffer update and boilerplate */
3769 len += vec_len (chain->data);
3770 ike0->nextpayload = chain->first_payload_type;
3771 ike0->length = clib_host_to_net_u32 (len);
3772 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3773 ikev2_payload_destroy_chain (chain);
3775 ike0->version = IKE_VERSION_2;
3776 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3777 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3778 ike0->ispi = sa.ispi;
3782 /* store whole IKE payload - needed for PSK auth */
3783 vec_free (sa.last_sa_init_req_packet_data);
3784 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3786 /* add data to the SA then add it to the pool */
3787 sa.iaddr.as_u32 = if_ip->as_u32;
3788 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3789 sa.i_id.type = p->loc_id.type;
3790 sa.i_id.data = vec_dup (p->loc_id.data);
3791 sa.r_id.type = p->rem_id.type;
3792 sa.r_id.data = vec_dup (p->rem_id.data);
3793 sa.i_auth.method = p->auth.method;
3794 sa.i_auth.hex = p->auth.hex;
3795 sa.i_auth.data = vec_dup (p->auth.data);
3796 sa.sw_if_index = p->responder.sw_if_index;
3797 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3798 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3800 ikev2_initial_contact_cleanup (&sa);
3802 /* add SA to the pool */
3803 ikev2_sa_t *sa0 = 0;
3804 pool_get (km->sais, sa0);
3805 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3806 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3808 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3809 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3811 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3812 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3813 p->responder.ip4.as_u32);
3820 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3821 ikev2_child_sa_t * csa)
3823 /* Create the Initiator notification for child SA removal */
3824 ikev2_main_t *km = &ikev2_main;
3829 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3832 ikev2_log_error ("buffer alloc failure");
3836 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3837 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3838 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3839 vec_resize (sa->del, 1);
3840 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3841 sa->del->spi = csa->i_proposals->spi;
3842 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3843 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3844 len = ikev2_generate_message (sa, ike0, 0, 0);
3846 len = ikev2_insert_non_esp_marker (ike0, len);
3847 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3848 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3850 /* delete local child SA */
3851 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3852 ikev2_sa_del_child_sa (sa, csa);
3856 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3859 ikev2_main_t *km = &ikev2_main;
3860 ikev2_main_per_thread_data_t *tkm;
3861 ikev2_sa_t *fsa = 0;
3862 ikev2_child_sa_t *fchild = 0;
3864 /* Search for the child SA */
3865 vec_foreach (tkm, km->per_thread_data)
3871 pool_foreach (sa, tkm->sas, ({
3872 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3882 if (!fchild || !fsa)
3884 r = clib_error_return (0, "Child SA not found");
3889 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3896 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3899 ikev2_main_t *km = &ikev2_main;
3900 ikev2_main_per_thread_data_t *tkm;
3901 ikev2_sa_t *fsa = 0;
3902 ikev2_main_per_thread_data_t *ftkm = 0;
3904 /* Search for the IKE SA */
3905 vec_foreach (tkm, km->per_thread_data)
3911 pool_foreach (sa, tkm->sas, ({
3912 if (sa->ispi == ispi)
3924 r = clib_error_return (0, "IKE SA not found");
3928 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3933 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3934 ikev2_child_sa_t * csa)
3936 /* Create the Initiator request for create child SA */
3941 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3944 ikev2_log_error ("buffer alloc failure");
3948 ike0->version = IKE_VERSION_2;
3949 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3950 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3951 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3952 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3953 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3954 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3956 ikev2_rekey_t *rekey;
3957 vec_add2 (sa->rekey, rekey, 1);
3958 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3961 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3962 rekey->spi = proposals[0].spi;
3963 rekey->ispi = csa->i_proposals->spi;
3964 len = ikev2_generate_message (sa, ike0, proposals, 0);
3966 len = ikev2_insert_non_esp_marker (ike0, len);
3967 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3968 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3969 vec_free (proposals);
3973 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3976 ikev2_main_t *km = &ikev2_main;
3977 ikev2_main_per_thread_data_t *tkm;
3978 ikev2_sa_t *fsa = 0;
3979 ikev2_child_sa_t *fchild = 0;
3981 /* Search for the child SA */
3982 vec_foreach (tkm, km->per_thread_data)
3988 pool_foreach (sa, tkm->sas, ({
3989 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3999 if (!fchild || !fsa)
4001 r = clib_error_return (0, "Child SA not found");
4006 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4013 ikev2_init (vlib_main_t * vm)
4015 ikev2_main_t *km = &ikev2_main;
4016 vlib_thread_main_t *tm = vlib_get_thread_main ();
4019 clib_memset (km, 0, sizeof (ikev2_main_t));
4020 km->vnet_main = vnet_get_main ();
4023 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4024 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4025 ikev2_crypto_init (km);
4027 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4029 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4030 CLIB_CACHE_LINE_BYTES);
4031 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4033 ikev2_main_per_thread_data_t *ptd =
4034 vec_elt_at_index (km->per_thread_data, thread_id);
4036 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4038 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4039 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4040 ptd->hmac_ctx = HMAC_CTX_new ();
4042 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4043 ptd->evp_ctx = &ptd->_evp_ctx;
4044 HMAC_CTX_init (&(ptd->_hmac_ctx));
4045 ptd->hmac_ctx = &ptd->_hmac_ctx;
4049 km->sa_by_ispi = hash_create (0, sizeof (uword));
4050 km->sw_if_indices = hash_create (0, 0);
4051 km->udp_ports = hash_create (0, sizeof (uword));
4053 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4054 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4056 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4057 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4059 ikev2_cli_reference ();
4061 km->log_level = IKEV2_LOG_ERROR;
4062 km->log_class = vlib_log_register_class ("ikev2", 0);
4067 VLIB_INIT_FUNCTION (ikev2_init) =
4069 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4074 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4077 ikev2_main_t *km = &ikev2_main;
4078 ikev2_profile_t *p = 0;
4079 vlib_main_t *vm = km->vlib_main;
4080 f64 now = vlib_time_now (vm);
4083 if (sa->profile_index != ~0)
4084 p = pool_elt_at_index (km->profiles, sa->profile_index);
4086 if (sa->is_initiator && p && csa->time_to_expiration
4087 && now > csa->time_to_expiration)
4089 if (!csa->is_expired || csa->rekey_retries > 0)
4091 ikev2_rekey_child_sa_internal (vm, sa, csa);
4092 csa->time_to_expiration = now + p->handover;
4093 csa->is_expired = 1;
4094 if (csa->rekey_retries == 0)
4096 csa->rekey_retries = 5;
4098 else if (csa->rekey_retries > 0)
4100 csa->rekey_retries--;
4101 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4102 csa->i_proposals->spi, csa->rekey_retries);
4103 if (csa->rekey_retries == 0)
4105 csa->rekey_retries = -1;
4112 csa->time_to_expiration = 0;
4113 ikev2_delete_child_sa_internal (vm, sa, csa);
4121 ipip_tunnel_t *ipip = NULL;
4122 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4123 if (~0 == sw_if_index)
4125 ip46_address_t local_ip;
4126 ip46_address_t remote_ip;
4127 if (sa->is_initiator)
4129 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4130 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4134 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4135 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4139 ipip_tunnel_key_t key = {
4142 .transport = IPIP_TRANSPORT_IP4,
4147 ipip = ipip_tunnel_db_find (&key);
4150 sw_if_index = ipip->sw_if_index;
4156 vec_add1 (sas_in, csa->remote_sa_id);
4157 vlib_worker_thread_barrier_sync (vm);
4158 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4159 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4160 vlib_worker_thread_barrier_release (vm);
4167 ikev2_set_log_level (ikev2_log_level_t log_level)
4169 ikev2_main_t *km = &ikev2_main;
4171 if (log_level >= IKEV2_LOG_MAX)
4173 ikev2_log_error ("unknown logging level %d", log_level);
4177 km->log_level = log_level;
4182 ikev2_set_liveness_params (u32 period, u32 max_retries)
4184 ikev2_main_t *km = &ikev2_main;
4186 if (period == 0 || max_retries == 0)
4187 return clib_error_return (0, "invalid args");
4189 km->liveness_period = period;
4190 km->liveness_max_retries = max_retries;
4195 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4197 ikev2_main_t *km = &ikev2_main;
4198 vlib_main_t *vm = km->vlib_main;
4199 ikev2_main_per_thread_data_t *tkm;
4200 ikev2_sa_t *fsa = 0;
4201 ikev2_profile_t *p = 0;
4202 ikev2_child_sa_t *fchild = 0;
4203 f64 now = vlib_time_now (vm);
4204 vlib_counter_t counts;
4206 /* Search for the SA and child SA */
4207 vec_foreach (tkm, km->per_thread_data)
4213 pool_foreach (sa, tkm->sas, ({
4214 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4223 vlib_get_combined_counter (&ipsec_sa_counters,
4224 ipsec_sa->stat_index, &counts);
4226 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4227 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4229 if (fchild && p && p->lifetime_maxdata)
4231 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4233 fchild->time_to_expiration = now;
4239 ikev2_process_pending_sa_init (ikev2_main_t * km)
4246 hash_foreach (ispi, sai, km->sa_by_ispi,
4248 sa = pool_elt_at_index (km->sais, sai);
4249 if (sa->init_response_received)
4253 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4256 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4257 clib_memcpy_fast (vlib_buffer_get_current (b),
4258 sa->last_sa_init_req_packet_data,
4259 vec_len (sa->last_sa_init_req_packet_data));
4260 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4261 vec_len (sa->last_sa_init_req_packet_data),
4262 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4267 static vlib_node_registration_t ikev2_mngr_process_node;
4270 ikev2_send_informational_request (ikev2_sa_t * sa)
4272 ikev2_main_t *km = &ikev2_main;
4273 ip4_address_t *src, *dst;
4279 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4282 ikev2_log_error ("buffer alloc failure");
4286 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4287 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4288 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4289 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4290 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4291 len = ikev2_generate_message (sa, ike0, 0, 0);
4293 len = ikev2_insert_non_esp_marker (ike0, len);
4295 if (sa->is_initiator)
4306 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4307 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4311 static_always_inline int
4312 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4314 ikev2_main_t *km = &ikev2_main;
4315 vlib_main_t *vm = km->vlib_main;
4317 if (!sa->keys_generated)
4320 if (sa->liveness_retries >= km->liveness_max_retries)
4323 f64 now = vlib_time_now (vm);
4325 if (sa->liveness_period_check < now)
4327 sa->liveness_retries++;
4328 sa->liveness_period_check = now + km->liveness_period;
4329 ikev2_send_informational_request (sa);
4335 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4338 ikev2_main_t *km = &ikev2_main;
4339 ipsec_main_t *im = &ipsec_main;
4341 ikev2_child_sa_t *c;
4347 vlib_process_wait_for_event_or_clock (vm, 1);
4348 vlib_process_get_events (vm, NULL);
4350 /* process ike child sas */
4351 ikev2_main_per_thread_data_t *tkm;
4352 vec_foreach (tkm, km->per_thread_data)
4355 u32 *to_be_deleted = 0;
4358 pool_foreach (sa, tkm->sas, ({
4359 ikev2_child_sa_t *c;
4361 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4363 sa->old_remote_id_present = 0;
4367 sa->old_id_expiration -= 1;
4369 vec_foreach (c, sa->childs)
4371 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4374 if (ikev2_mngr_process_responder_sas (sa))
4375 vec_add1 (to_be_deleted, sa - tkm->sas);
4379 vec_foreach (sai, to_be_deleted)
4381 sa = pool_elt_at_index (tkm->sas, sai[0]);
4382 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4383 vec_foreach (c, sa->childs)
4385 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4386 ikev2_sa_del_child_sa (sa, c);
4388 ikev2_sa_free_all_vec (sa);
4389 hash_unset (tkm->sa_by_rspi, sa->rspi);
4390 pool_put (tkm->sas, sa);
4394 p = pool_elt_at_index (km->profiles, sa->profile_index);
4397 ikev2_initiate_sa_init (vm, p->name);
4401 vec_free (to_be_deleted);
4404 /* process ipsec sas */
4407 pool_foreach (sa, im->sad, ({
4408 ikev2_mngr_process_ipsec_sa(sa);
4412 ikev2_process_pending_sa_init (km);
4416 vlib_process_wait_for_event_or_clock (vm, 5);
4417 vlib_process_get_events (vm, NULL);
4426 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4427 .function = ikev2_mngr_process_fn,
4428 .type = VLIB_NODE_TYPE_PROCESS,
4430 "ikev2-manager-process",
4433 VLIB_PLUGIN_REGISTER () = {
4434 .version = VPP_BUILD_VER,
4435 .description = "Internet Key Exchange (IKEv2) Protocol",
4440 * fd.io coding-style-patch-verification: ON
4443 * eval: (c-set-style "gnu")