2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received")
77 #define _(sym,str) IKEV2_ERROR_##sym,
83 static char *ikev2_error_strings[] = {
84 #define _(sym,string) string,
91 IKEV2_NEXT_IP4_LOOKUP,
92 IKEV2_NEXT_ERROR_DROP,
96 typedef u32 ikev2_non_esp_marker;
98 static_always_inline u16
99 ikev2_get_port (ikev2_sa_t * sa)
101 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
104 static_always_inline int
105 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
107 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
108 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
109 return len + sizeof (ikev2_non_esp_marker);
112 static ikev2_sa_transform_t *
113 ikev2_find_transform_data (ikev2_sa_transform_t * t)
115 ikev2_main_t *km = &ikev2_main;
116 ikev2_sa_transform_t *td;
118 vec_foreach (td, km->supported_transforms)
120 if (td->type != t->type)
123 if (td->transform_id != t->transform_id)
126 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
128 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
129 || t->attrs[1] != 14)
132 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
140 static ikev2_sa_proposal_t *
141 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
142 ikev2_protocol_id_t prot_id)
144 ikev2_sa_proposal_t *rv = 0;
145 ikev2_sa_proposal_t *proposal;
146 ikev2_sa_transform_t *transform, *new_t;
147 u8 mandatory_bitmap, optional_bitmap;
149 if (prot_id == IKEV2_PROTOCOL_IKE)
151 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
152 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
153 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
155 else if (prot_id == IKEV2_PROTOCOL_ESP)
157 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
158 (1 << IKEV2_TRANSFORM_TYPE_ESN);
159 optional_bitmap = mandatory_bitmap |
160 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
162 else if (prot_id == IKEV2_PROTOCOL_AH)
164 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
165 (1 << IKEV2_TRANSFORM_TYPE_ESN);
166 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
171 vec_add2 (rv, proposal, 1);
173 vec_foreach (proposal, proposals)
176 if (proposal->protocol_id != prot_id)
179 vec_foreach (transform, proposal->transforms)
181 if ((1 << transform->type) & bitmap)
184 if (ikev2_find_transform_data (transform))
186 bitmap |= 1 << transform->type;
187 vec_add2 (rv->transforms, new_t, 1);
188 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
189 new_t->attrs = vec_dup (transform->attrs);
193 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
194 (bitmap & ~optional_bitmap) == 0)
196 rv->proposal_num = proposal->proposal_num;
197 rv->protocol_id = proposal->protocol_id;
198 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
203 vec_free (rv->transforms);
212 ikev2_sa_transform_t *
213 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
214 ikev2_transform_type_t type)
216 ikev2_sa_transform_t *t;
221 vec_foreach (t, p->transforms)
224 return ikev2_find_transform_data (t);
230 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
234 vec_foreach (c, sa->childs)
236 ikev2_sa_proposal_t *proposal =
237 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
238 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
246 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
248 ikev2_sa_proposal_t *p;
249 ikev2_sa_transform_t *t;
256 vec_foreach (t, p->transforms)
260 vec_free (p->transforms);
266 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
268 ikev2_sa_free_proposal_vector (&c->r_proposals);
269 ikev2_sa_free_proposal_vector (&c->i_proposals);
279 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
282 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
288 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
290 ikev2_sa_free_child_sa (child);
291 vec_del1 (sa->childs, child - sa->childs);
295 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
297 vec_free (sa->i_nonce);
298 vec_free (sa->i_dh_data);
299 vec_free (sa->dh_shared_key);
300 vec_free (sa->dh_private_key);
302 ikev2_sa_free_proposal_vector (&sa->r_proposals);
303 ikev2_sa_free_proposal_vector (&sa->i_proposals);
306 vec_free (sa->sk_ai);
307 vec_free (sa->sk_ar);
308 vec_free (sa->sk_ei);
309 vec_free (sa->sk_er);
310 vec_free (sa->sk_pi);
311 vec_free (sa->sk_pr);
313 vec_free (sa->i_id.data);
314 vec_free (sa->i_auth.data);
315 vec_free (sa->r_id.data);
316 vec_free (sa->r_auth.data);
318 EVP_PKEY_free (sa->r_auth.key);
322 ikev2_sa_free_all_child_sa (&sa->childs);
326 ikev2_delete_sa (ikev2_sa_t * sa)
328 ikev2_main_t *km = &ikev2_main;
329 u32 thread_index = vlib_get_thread_index ();
332 ikev2_sa_free_all_vec (sa);
334 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
337 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
338 pool_put (km->per_thread_data[thread_index].sas, sa);
343 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
345 ikev2_sa_transform_t *t = 0, *t2;
346 ikev2_main_t *km = &ikev2_main;
348 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
353 /* check if received DH group is on our list of supported groups */
354 vec_foreach (t2, km->supported_transforms)
356 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
365 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
369 if (sa->is_initiator)
372 RAND_bytes ((u8 *) & sa->ispi, 8);
375 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
376 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
381 RAND_bytes ((u8 *) & sa->rspi, 8);
384 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
385 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
388 /* generate dh keys */
389 ikev2_generate_dh (sa, t);
394 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
396 ikev2_sa_transform_t *t = 0, *t2;
397 ikev2_main_t *km = &ikev2_main;
399 /*move some data to the new SA */
400 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
401 sa->i_nonce = _(sai->i_nonce);
402 sa->i_dh_data = _(sai->i_dh_data);
403 sa->dh_private_key = _(sai->dh_private_key);
404 sa->iaddr.as_u32 = sai->iaddr.as_u32;
405 sa->raddr.as_u32 = sai->raddr.as_u32;
406 sa->is_initiator = sai->is_initiator;
407 sa->i_id.type = sai->i_id.type;
408 sa->r_id.type = sai->r_id.type;
409 sa->profile_index = sai->profile_index;
410 sa->tun_itf = sai->tun_itf;
411 sa->is_tun_itf_set = sai->is_tun_itf_set;
412 sa->i_id.data = _(sai->i_id.data);
413 sa->r_id.data = _(sai->r_id.data);
414 sa->i_auth.method = sai->i_auth.method;
415 sa->i_auth.hex = sai->i_auth.hex;
416 sa->i_auth.data = _(sai->i_auth.data);
417 sa->i_auth.key = _(sai->i_auth.key);
418 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
419 sa->childs = _(sai->childs);
420 sa->udp_encap = sai->udp_encap;
421 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
422 sa->dst_port = sai->dst_port;
423 sa->sw_if_index = sai->sw_if_index;
427 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
432 /* check if received DH group is on our list of supported groups */
433 vec_foreach (t2, km->supported_transforms)
435 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
444 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
449 /* generate dh keys */
450 ikev2_complete_dh (sa, t);
455 ikev2_calc_keys (ikev2_sa_t * sa)
458 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
461 u16 integ_key_len = 0, salt_len = 0;
462 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
464 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
466 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
468 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
471 integ_key_len = tr_integ->key_len;
473 salt_len = sizeof (u32);
475 vec_append (s, sa->i_nonce);
476 vec_append (s, sa->r_nonce);
477 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
479 /* Calculate S = Ni | Nr | SPIi | SPIr */
481 vec_add2 (s, tmp, 2 * sizeof (*spi));
483 spi[0] = clib_host_to_net_u64 (sa->ispi);
484 spi[1] = clib_host_to_net_u64 (sa->rspi);
486 /* calculate PRFplus */
488 int len = tr_prf->key_trunc + /* SK_d */
489 integ_key_len * 2 + /* SK_ai, SK_ar */
490 tr_encr->key_len * 2 + /* SK_ei, SK_er */
491 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
494 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
501 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
502 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
503 pos += tr_prf->key_trunc;
508 sa->sk_ai = vec_new (u8, integ_key_len);
509 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
510 pos += integ_key_len;
513 sa->sk_ar = vec_new (u8, integ_key_len);
514 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
515 pos += integ_key_len;
519 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
520 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
521 pos += tr_encr->key_len + salt_len;
524 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
525 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
526 pos += tr_encr->key_len + salt_len;
529 sa->sk_pi = vec_new (u8, tr_prf->key_len);
530 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
531 pos += tr_prf->key_len;
534 sa->sk_pr = vec_new (u8, tr_prf->key_len);
535 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
536 pos += tr_prf->key_len;
542 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
545 u16 integ_key_len = 0;
548 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
550 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
552 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
554 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
557 integ_key_len = ctr_integ->key_len;
559 salt_len = sizeof (u32);
561 vec_append (s, sa->i_nonce);
562 vec_append (s, sa->r_nonce);
563 /* calculate PRFplus */
565 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
567 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
572 child->sk_ei = vec_new (u8, ctr_encr->key_len);
573 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
574 pos += ctr_encr->key_len;
579 child->sk_ai = vec_new (u8, ctr_integ->key_len);
580 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
581 pos += ctr_integ->key_len;
585 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
590 child->sk_er = vec_new (u8, ctr_encr->key_len);
591 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
592 pos += ctr_encr->key_len;
597 child->sk_ar = vec_new (u8, integ_key_len);
598 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
599 pos += integ_key_len;
603 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
612 static_always_inline u8 *
613 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
615 /* ispi, rspi, ip, port */
616 u8 buf[8 + 8 + 4 + 2];
617 u8 *res = vec_new (u8, 20);
619 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
620 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
621 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
622 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
623 SHA1 (buf, sizeof (buf), res);
628 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
629 ike_header_t * ike, udp_header_t * udp)
632 u32 len = clib_net_to_host_u32 (ike->length);
633 u8 payload = ike->nextpayload;
635 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
637 clib_net_to_host_u64 (ike->ispi),
638 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
640 sa->ispi = clib_net_to_host_u64 (ike->ispi);
642 /* store whole IKE payload - needed for PSK auth */
643 vec_free (sa->last_sa_init_req_packet_data);
644 vec_add (sa->last_sa_init_req_packet_data, ike, len);
646 while (p < len && payload != IKEV2_PAYLOAD_NONE)
648 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
649 u32 plen = clib_net_to_host_u16 (ikep->length);
651 if (plen < sizeof (ike_payload_header_t))
654 if (payload == IKEV2_PAYLOAD_SA)
656 ikev2_sa_free_proposal_vector (&sa->i_proposals);
657 sa->i_proposals = ikev2_parse_sa_payload (ikep);
659 else if (payload == IKEV2_PAYLOAD_KE)
661 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
662 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
663 vec_free (sa->i_dh_data);
664 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
666 else if (payload == IKEV2_PAYLOAD_NONCE)
668 vec_free (sa->i_nonce);
669 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
671 else if (payload == IKEV2_PAYLOAD_NOTIFY)
673 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
674 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
677 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
678 clib_net_to_host_u32 (sa->
681 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
684 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
685 " behind NAT", sa->ispi);
689 else if (n->msg_type ==
690 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
693 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
694 clib_net_to_host_u32 (sa->
697 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
700 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
701 " (self) behind NAT", sa->ispi);
707 else if (payload == IKEV2_PAYLOAD_VENDOR)
709 ikev2_parse_vendor_payload (ikep);
713 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
715 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
717 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
718 sa->unsupported_cp = payload;
723 payload = ikep->nextpayload;
727 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
731 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
732 ike_header_t * ike, udp_header_t * udp)
735 u32 len = clib_net_to_host_u32 (ike->length);
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)
838 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
840 u8 last_payload = 0, *plaintext = 0;
842 u32 len = clib_net_to_host_u32 (ike->length);
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)
987 ikev2_child_sa_t *first_child_sa;
989 u8 payload = ike->nextpayload;
991 ike_payload_header_t *ikep;
994 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
995 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
996 clib_host_to_net_u64 (ike->rspi),
997 sa->is_initiator ? sa->raddr.as_u32 : sa->
1000 ikev2_calc_keys (sa);
1002 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1006 if (sa->unsupported_cp)
1007 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1008 goto cleanup_and_exit;
1011 /* select or create 1st child SA */
1012 if (sa->is_initiator)
1014 first_child_sa = &sa->childs[0];
1018 ikev2_sa_free_all_child_sa (&sa->childs);
1019 vec_add2 (sa->childs, first_child_sa, 1);
1023 /* process encrypted payload */
1025 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1027 ikep = (ike_payload_header_t *) & plaintext[p];
1028 plen = clib_net_to_host_u16 (ikep->length);
1030 if (plen < sizeof (ike_payload_header_t))
1031 goto cleanup_and_exit;
1033 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1035 if (sa->is_initiator)
1037 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1038 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
1042 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1043 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1046 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1048 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1050 sa->i_id.type = id->id_type;
1051 vec_free (sa->i_id.data);
1052 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1054 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1056 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1058 sa->r_id.type = id->id_type;
1059 vec_free (sa->r_id.data);
1060 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1062 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1064 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1066 if (sa->is_initiator)
1068 sa->r_auth.method = a->auth_method;
1069 vec_free (sa->r_auth.data);
1070 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1074 sa->i_auth.method = a->auth_method;
1075 vec_free (sa->i_auth.data);
1076 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1079 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1081 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1082 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1084 sa->initial_contact = 1;
1088 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1090 ikev2_parse_vendor_payload (ikep);
1092 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1094 vec_free (first_child_sa->tsi);
1095 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1097 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1099 vec_free (first_child_sa->tsr);
1100 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1104 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1107 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1109 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1110 sa->unsupported_cp = payload;
1115 payload = ikep->nextpayload;
1120 vec_free (plaintext);
1124 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1128 u8 payload = ike->nextpayload;
1130 ike_payload_header_t *ikep;
1133 sa->liveness_retries = 0;
1134 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1135 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1136 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1138 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1141 goto cleanup_and_exit;
1143 /* process encrypted payload */
1145 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1147 ikep = (ike_payload_header_t *) & plaintext[p];
1148 plen = clib_net_to_host_u16 (ikep->length);
1150 if (plen < sizeof (ike_payload_header_t))
1151 goto cleanup_and_exit;
1153 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1155 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1156 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1157 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1160 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1162 sa->del = ikev2_parse_delete_payload (ikep);
1164 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1166 ikev2_parse_vendor_payload (ikep);
1170 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1172 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1174 sa->unsupported_cp = payload;
1179 payload = ikep->nextpayload;
1184 vec_free (plaintext);
1188 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1192 u8 payload = ike->nextpayload;
1195 u8 nonce[IKEV2_NONCE_SIZE];
1197 ike_payload_header_t *ikep;
1199 ikev2_notify_t *n = 0;
1200 ikev2_ts_t *tsi = 0;
1201 ikev2_ts_t *tsr = 0;
1202 ikev2_sa_proposal_t *proposal = 0;
1203 ikev2_child_sa_t *child_sa;
1205 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1206 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1207 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1209 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1212 goto cleanup_and_exit;
1214 /* process encrypted payload */
1216 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1218 ikep = (ike_payload_header_t *) & plaintext[p];
1219 plen = clib_net_to_host_u16 (ikep->length);
1221 if (plen < sizeof (ike_payload_header_t))
1222 goto cleanup_and_exit;
1224 else if (payload == IKEV2_PAYLOAD_SA)
1226 proposal = ikev2_parse_sa_payload (ikep);
1228 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1230 n = ikev2_parse_notify_payload (ikep);
1231 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1236 else if (payload == IKEV2_PAYLOAD_DELETE)
1238 sa->del = ikev2_parse_delete_payload (ikep);
1240 else if (payload == IKEV2_PAYLOAD_VENDOR)
1242 ikev2_parse_vendor_payload (ikep);
1244 else if (payload == IKEV2_PAYLOAD_NONCE)
1246 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1248 else if (payload == IKEV2_PAYLOAD_TSI)
1250 tsi = ikev2_parse_ts_payload (ikep);
1252 else if (payload == IKEV2_PAYLOAD_TSR)
1254 tsr = ikev2_parse_ts_payload (ikep);
1258 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1260 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1262 sa->unsupported_cp = payload;
1263 goto cleanup_and_exit;
1267 payload = ikep->nextpayload;
1271 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1273 ikev2_rekey_t *rekey = &sa->rekey[0];
1274 rekey->protocol_id = proposal->protocol_id;
1276 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1277 rekey->i_proposal->spi = rekey->spi;
1278 rekey->r_proposal = proposal;
1282 vec_free (sa->r_nonce);
1283 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1284 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1287 child_sa->rekey_retries = 0;
1292 ikev2_rekey_t *rekey;
1293 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1296 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1298 goto cleanup_and_exit;
1300 vec_add2 (sa->rekey, rekey, 1);
1301 rekey->protocol_id = n->protocol_id;
1302 rekey->spi = n->spi;
1303 rekey->i_proposal = proposal;
1305 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1309 vec_free (sa->i_nonce);
1310 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1311 /* generate new Nr */
1312 vec_free (sa->r_nonce);
1313 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1314 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1318 vec_free (plaintext);
1323 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1331 ikev2_sa_transform_t *tr_prf;
1334 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1340 nonce = sa->i_nonce;
1341 packet_data = sa->last_sa_init_res_packet_data;
1347 nonce = sa->r_nonce;
1348 packet_data = sa->last_sa_init_req_packet_data;
1351 data = vec_new (u8, 4);
1353 vec_append (data, id->data);
1355 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1356 vec_append (authmsg, packet_data);
1357 vec_append (authmsg, nonce);
1358 vec_append (authmsg, id_hash);
1366 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1368 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1369 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1370 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1371 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1378 ikev2_sa_match_ts (ikev2_sa_t * sa)
1380 ikev2_main_t *km = &ikev2_main;
1382 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1383 ikev2_id_t *id_rem, *id_loc;
1386 pool_foreach (p, km->profiles, ({
1388 if (sa->is_initiator)
1404 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1405 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1408 sa->profile_index = p - km->profiles;
1410 vec_foreach(ts, sa->childs[0].tsi)
1412 if (ikev2_ts_cmp(p_tsi, ts))
1414 vec_add1 (tsi, ts[0]);
1419 vec_foreach(ts, sa->childs[0].tsr)
1421 if (ikev2_ts_cmp(p_tsr, ts))
1423 vec_add1 (tsr, ts[0]);
1434 vec_free (sa->childs[0].tsi);
1435 vec_free (sa->childs[0].tsr);
1436 sa->childs[0].tsi = tsi;
1437 sa->childs[0].tsr = tsr;
1443 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1448 ikev2_sa_auth (ikev2_sa_t * sa)
1450 ikev2_main_t *km = &ikev2_main;
1451 ikev2_profile_t *p, *sel_p = 0;
1452 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1453 ikev2_sa_transform_t *tr_prf;
1456 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1458 /* only shared key and rsa signature */
1459 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1460 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1462 ikev2_elog_uint (IKEV2_LOG_ERROR,
1463 "unsupported authentication method %u",
1465 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1469 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1470 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1472 ikev2_id_t *id_rem, *id_loc;
1473 ikev2_auth_t *sa_auth;
1475 if (sa->is_initiator)
1479 sa_auth = &sa->r_auth;
1485 sa_auth = &sa->i_auth;
1489 pool_foreach (p, km->profiles, ({
1492 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1493 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1496 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1498 if (!p->auth.data ||
1499 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1502 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1503 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1505 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1507 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1514 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1516 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1519 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1521 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1534 sa->udp_encap = sel_p->udp_encap;
1535 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1539 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1541 if (!sa->is_initiator)
1543 vec_free (sa->r_id.data);
1544 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1545 sa->r_id.type = sel_p->loc_id.type;
1546 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1547 sa->i_id.type = sel_p->rem_id.type;
1549 /* generate our auth data */
1550 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1551 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1553 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1554 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1556 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1558 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1559 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1563 /* select transforms for 1st child sa */
1564 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1565 sa->childs[0].r_proposals =
1566 ikev2_select_proposal (sa->childs[0].i_proposals,
1567 IKEV2_PROTOCOL_ESP);
1569 if (~0 != sel_p->tun_itf)
1571 sa->is_tun_itf_set = 1;
1572 sa->tun_itf = sel_p->tun_itf;
1578 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1579 "profile found! ispi %lx", sa->ispi);
1580 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1588 ikev2_sa_auth_init (ikev2_sa_t * sa)
1590 ikev2_main_t *km = &ikev2_main;
1591 u8 *authmsg, *key_pad, *psk = 0;
1592 ikev2_sa_transform_t *tr_prf;
1595 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1597 /* only shared key and rsa signature */
1598 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1599 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1601 ikev2_elog_uint (IKEV2_LOG_ERROR,
1602 "unsupported authentication method %u",
1604 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1608 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1609 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1610 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1612 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1614 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1615 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1617 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1619 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1620 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1629 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1631 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1635 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1637 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1647 ipsec_sa_flags_t flags;
1650 ipsec_crypto_alg_t encr_type;
1651 ipsec_integ_alg_t integ_type;
1652 ip46_address_t local_ip;
1653 ip46_address_t remote_ip;
1654 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1656 u32 old_remote_sa_id;
1657 u16 ipsec_over_udp_port;
1660 } ikev2_add_ipsec_tunnel_args_t;
1663 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1665 ikev2_main_t *km = &ikev2_main;
1669 if (~0 == a->sw_if_index)
1671 /* no tunnel associated with the SA/profile - create a new one */
1672 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1673 &a->local_ip, &a->remote_ip, 0,
1674 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1675 TUNNEL_MODE_P2P, &sw_if_index);
1677 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1679 if (hash_get (km->sw_if_indices, sw_if_index))
1680 /* interface is managed by IKE; proceed with updating SAs */
1683 hash_set1 (km->sw_if_indices, sw_if_index);
1687 sw_if_index = a->sw_if_index;
1688 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1693 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1694 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1695 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1700 vec_add1 (sas_in, a->remote_sa_id);
1703 ipsec_tun_protect_del (sw_if_index, NULL);
1705 /* replace local SA immediately */
1706 ipsec_sa_unlock_id (a->local_sa_id);
1708 /* keep the old sa */
1709 vec_add1 (sas_in, a->old_remote_sa_id);
1712 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1714 IPSEC_PROTOCOL_ESP, a->encr_type,
1715 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1716 a->flags, 0, a->salt_local, &a->local_ip,
1717 &a->remote_ip, NULL, a->src_port, a->dst_port);
1718 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1719 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1720 a->integ_type, &a->rem_ikey,
1721 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1722 a->salt_remote, &a->remote_ip,
1723 &a->local_ip, NULL, a->ipsec_over_udp_port,
1724 a->ipsec_over_udp_port);
1726 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1730 ikev2_create_tunnel_interface (vlib_main_t * vm,
1733 ikev2_child_sa_t * child, u32 sa_index,
1734 u32 child_index, u8 is_rekey)
1736 ikev2_main_t *km = &ikev2_main;
1737 ipsec_crypto_alg_t encr_type;
1738 ipsec_integ_alg_t integ_type;
1739 ikev2_profile_t *p = 0;
1740 ikev2_sa_transform_t *tr;
1741 ikev2_sa_proposal_t *proposals;
1743 ikev2_add_ipsec_tunnel_args_t a;
1745 clib_memset (&a, 0, sizeof (a));
1747 if (!child->r_proposals)
1749 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1753 if (sa->is_initiator)
1755 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1756 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1757 proposals = child->r_proposals;
1758 a.local_spi = child->r_proposals[0].spi;
1759 a.remote_spi = child->i_proposals[0].spi;
1763 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1764 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1765 proposals = child->i_proposals;
1766 a.local_spi = child->i_proposals[0].spi;
1767 a.remote_spi = child->r_proposals[0].spi;
1770 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1773 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1774 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1777 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1778 a.is_rekey = is_rekey;
1780 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1781 if (tr && tr->esn_type)
1782 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1784 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1787 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1789 switch (tr->key_len)
1792 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1795 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1798 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1801 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1806 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1809 switch (tr->key_len)
1812 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1815 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1818 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1821 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1829 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1835 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1838 a.encr_type = encr_type;
1842 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1845 switch (tr->integ_type)
1847 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1848 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1850 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1851 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1853 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1854 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1856 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1857 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1860 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1866 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1872 integ_type = IPSEC_INTEG_ALG_NONE;
1875 a.integ_type = integ_type;
1876 ikev2_calc_child_keys (sa, child);
1878 if (sa->is_initiator)
1880 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1881 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1882 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1883 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1886 a.salt_remote = child->salt_er;
1887 a.salt_local = child->salt_ei;
1889 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1893 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1894 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1895 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1896 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1899 a.salt_remote = child->salt_ei;
1900 a.salt_local = child->salt_er;
1902 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1903 a.src_port = sa->ipsec_over_udp_port;
1906 if (sa->is_initiator && sa->profile_index != ~0)
1907 p = pool_elt_at_index (km->profiles, sa->profile_index);
1909 if (p && p->lifetime)
1911 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1912 if (p->lifetime_jitter)
1914 // This is not much better than rand(3), which Coverity warns
1915 // is unsuitable for security applications; random_u32 is
1916 // however fast. If this perturbance to the expiration time
1917 // needs to use a better RNG then we may need to use something
1918 // like /dev/urandom which has significant overhead.
1919 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1920 rnd = random_u32 (&rnd);
1922 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1926 if (thread_index & 0xffffffc0)
1927 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1929 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1930 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1932 child->local_sa_id =
1934 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1936 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1941 /* create a new remote SA ID to keep the old SA for a bit longer
1942 * so the peer has some time to swap their SAs */
1944 /* use most significat bit of child index part in id */
1946 if (sa->current_remote_id_mask)
1948 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1949 sa->current_remote_id_mask = 0;
1953 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1954 sa->current_remote_id_mask = mask;
1955 remote_sa_id |= mask;
1957 sa->old_id_expiration = 3.0;
1958 sa->old_remote_id_present = 1;
1961 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1963 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1964 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1966 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1967 (u8 *) & a, sizeof (a));
1973 ip46_address_t local_ip;
1974 ip46_address_t remote_ip;
1978 } ikev2_del_ipsec_tunnel_args_t;
1980 static_always_inline u32
1981 ikev2_flip_alternate_sa_bit (u32 id)
1990 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1992 ikev2_main_t *km = &ikev2_main;
1993 ipip_tunnel_t *ipip = NULL;
1996 if (~0 == a->sw_if_index)
1999 ipip_tunnel_key_t key = {
2001 .dst = a->remote_ip,
2002 .transport = IPIP_TRANSPORT_IP4,
2007 ipip = ipip_tunnel_db_find (&key);
2011 sw_if_index = ipip->sw_if_index;
2012 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2019 sw_if_index = a->sw_if_index;
2020 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2023 if (~0 != sw_if_index)
2024 ipsec_tun_protect_del (sw_if_index, NULL);
2026 ipsec_sa_unlock_id (a->remote_sa_id);
2027 ipsec_sa_unlock_id (a->local_sa_id);
2028 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2031 ipip_del_tunnel (ipip->sw_if_index);
2035 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2036 ikev2_child_sa_t * child)
2038 ikev2_del_ipsec_tunnel_args_t a;
2040 clib_memset (&a, 0, sizeof (a));
2042 if (sa->is_initiator)
2044 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2045 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2049 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2050 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2053 a.remote_sa_id = child->remote_sa_id;
2054 a.local_sa_id = child->local_sa_id;
2055 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2057 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2063 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2067 ike_payload_header_t *ph;
2071 ikev2_sa_transform_t *tr_encr, *tr_integ;
2073 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2075 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2077 ikev2_payload_chain_t *chain = 0;
2078 ikev2_payload_new_chain (chain);
2080 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2082 if (sa->r_proposals == 0)
2084 ikev2_payload_add_notify (chain,
2085 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2086 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2088 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2090 u8 *data = vec_new (u8, 2);
2091 ikev2_sa_transform_t *tr_dh;
2093 ikev2_sa_get_td_for_type (sa->r_proposals,
2094 IKEV2_TRANSFORM_TYPE_DH);
2095 ASSERT (tr_dh && tr_dh->dh_type);
2097 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2098 data[1] = (tr_dh->dh_type) & 0xff;
2100 ikev2_payload_add_notify (chain,
2101 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2104 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2106 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2108 u8 *data = vec_new (u8, 1);
2110 data[0] = sa->unsupported_cp;
2111 ikev2_payload_add_notify (chain,
2112 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2120 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2121 ikev2_payload_add_sa (chain, sa->r_proposals);
2122 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2123 ikev2_payload_add_nonce (chain, sa->r_nonce);
2125 u8 *nat_detection_sha1 =
2126 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2127 clib_host_to_net_u64 (sa->rspi),
2128 clib_host_to_net_u32 (sa->raddr.as_u32),
2130 ikev2_payload_add_notify (chain,
2131 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2132 nat_detection_sha1);
2133 vec_free (nat_detection_sha1);
2134 nat_detection_sha1 =
2135 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2136 clib_host_to_net_u64 (sa->rspi),
2137 sa->iaddr.as_u32, udp->src_port);
2138 ikev2_payload_add_notify (chain,
2139 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2140 nat_detection_sha1);
2141 vec_free (nat_detection_sha1);
2144 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2146 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2148 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2149 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2150 ikev2_payload_add_auth (chain, &sa->r_auth);
2151 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2152 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2153 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2155 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2157 ikev2_payload_add_notify (chain,
2158 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2160 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2162 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2164 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2166 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2167 ikev2_payload_add_auth (chain, &sa->r_auth);
2169 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2171 ikev2_payload_add_notify (chain,
2172 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2173 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2174 ikev2_payload_add_auth (chain, &sa->r_auth);
2175 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2176 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2178 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2180 u8 *data = vec_new (u8, 1);
2182 data[0] = sa->unsupported_cp;
2183 ikev2_payload_add_notify (chain,
2184 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2188 else if (sa->state == IKEV2_STATE_SA_INIT)
2190 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2191 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2192 ikev2_payload_add_auth (chain, &sa->i_auth);
2193 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2194 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2195 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2196 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2201 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2205 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2207 /* if pending delete */
2210 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2212 if (sa->is_initiator)
2213 ikev2_payload_add_delete (chain, sa->del);
2215 /* The response to a request that deletes the IKE SA is an empty
2216 INFORMATIONAL response. */
2217 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2219 /* The response to a request that deletes ESP or AH SAs will contain
2220 delete payloads for the paired SAs going in the other direction. */
2223 ikev2_payload_add_delete (chain, sa->del);
2228 /* received N(AUTHENTICATION_FAILED) */
2229 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2231 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2234 /* received unsupported critical payload */
2235 else if (sa->unsupported_cp)
2237 u8 *data = vec_new (u8, 1);
2239 data[0] = sa->unsupported_cp;
2240 ikev2_payload_add_notify (chain,
2241 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2244 sa->unsupported_cp = 0;
2246 /* else send empty response */
2248 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2250 if (sa->is_initiator)
2253 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2254 ikev2_notify_t notify;
2255 u8 *data = vec_new (u8, 4);
2256 clib_memset (¬ify, 0, sizeof (notify));
2257 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2258 notify.spi = sa->childs[0].i_proposals->spi;
2259 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2261 ikev2_payload_add_sa (chain, proposals);
2262 ikev2_payload_add_nonce (chain, sa->i_nonce);
2263 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2264 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2265 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2272 if (vec_len (sa->rekey) > 0)
2274 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2275 ikev2_payload_add_nonce (chain, sa->r_nonce);
2276 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2278 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2280 vec_del1 (sa->rekey, 0);
2282 else if (sa->unsupported_cp)
2284 u8 *data = vec_new (u8, 1);
2286 data[0] = sa->unsupported_cp;
2287 ikev2_payload_add_notify (chain,
2288 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2291 sa->unsupported_cp = 0;
2295 ikev2_payload_add_notify (chain,
2296 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2303 ike->version = IKE_VERSION_2;
2304 ike->nextpayload = IKEV2_PAYLOAD_SK;
2305 tlen = sizeof (*ike);
2306 if (sa->is_initiator)
2308 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2309 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2313 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2317 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2319 tlen += vec_len (chain->data);
2320 ike->nextpayload = chain->first_payload_type;
2321 ike->length = clib_host_to_net_u32 (tlen);
2322 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2324 /* store whole IKE payload - needed for PSK auth */
2325 vec_free (sa->last_sa_init_res_packet_data);
2326 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2330 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2331 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2334 plen = sizeof (*ph);
2335 ph = (ike_payload_header_t *) & ike->payload[0];
2336 ph->nextpayload = chain->first_payload_type;
2339 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2340 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2341 plen += vec_len (chain->data) + iv_len;
2343 /* add space for hmac/tag */
2345 plen += tr_integ->key_trunc;
2347 plen += IKEV2_GCM_ICV_SIZE;
2350 /* payload and total length */
2351 ph->length = clib_host_to_net_u16 (plen);
2352 ike->length = clib_host_to_net_u32 (tlen);
2356 ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2357 ph->payload, (u8 *) ike,
2358 sizeof (*ike) + sizeof (*ph),
2359 ph->payload + plen - sizeof (*ph) -
2360 IKEV2_GCM_ICV_SIZE);
2364 ikev2_encrypt_data (ptd, sa, tr_encr, chain->data, ph->payload);
2366 ikev2_calc_integr (tr_integ,
2367 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2368 (u8 *) ike, tlen - tr_integ->key_trunc);
2369 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2370 sizeof (*ike), integ, tr_integ->key_trunc);
2373 /* store whole IKE payload - needed for retransmit */
2374 vec_free (sa->last_res_packet_data);
2375 vec_add (sa->last_res_packet_data, ike, tlen);
2379 ikev2_payload_destroy_chain (chain);
2385 ikev2_retransmit_sa_init (ike_header_t * ike,
2386 ip4_address_t iaddr, ip4_address_t raddr)
2388 ikev2_main_t *km = &ikev2_main;
2390 u32 thread_index = vlib_get_thread_index ();
2393 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2394 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2395 sa->iaddr.as_u32 == iaddr.as_u32 &&
2396 sa->raddr.as_u32 == raddr.as_u32)
2399 u32 len = clib_net_to_host_u32(ike->length);
2400 u8 payload = ike->nextpayload;
2402 while (p < len && 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)
2417 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
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,
2427 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2428 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2429 "ispi %lx IKE_SA_INIT retransmit "
2430 "from %d.%d.%d.%d to %d.%d.%d.%d",
2432 raddr.as_u32, iaddr.as_u32);
2435 /* else ignore req */
2438 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2439 "ispi %lx IKE_SA_INIT ignore "
2440 "from %d.%d.%d.%d to %d.%d.%d.%d",
2442 raddr.as_u32, iaddr.as_u32);
2447 payload = ikep->nextpayload;
2454 /* req is not retransmit */
2459 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2461 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2464 if (msg_id > sa->last_msg_id)
2466 sa->last_msg_id = msg_id;
2469 /* retransmitted req */
2470 else if (msg_id == sa->last_msg_id)
2473 tmp = (ike_header_t *) sa->last_res_packet_data;
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,
2483 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2484 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2485 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2488 /* old req ignore */
2491 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2492 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2498 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2500 ikev2_main_t *km = &ikev2_main;
2501 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2502 sa->profile_index = ~0;
2506 ikev2_del_sa_init_from_main (u64 * ispi)
2508 ikev2_main_t *km = &ikev2_main;
2509 uword *p = hash_get (km->sa_by_ispi, *ispi);
2512 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2513 hash_unset (km->sa_by_ispi, sai->ispi);
2514 ikev2_sa_free_all_vec (sai);
2515 pool_put (km->sais, sai);
2520 ikev2_del_sa_init (u64 ispi)
2522 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2527 ikev2_node_fn (vlib_main_t * vm,
2528 vlib_node_runtime_t * node, vlib_frame_t * frame)
2530 u32 n_left_from, *from, *to_next;
2531 ikev2_next_t next_index;
2532 ikev2_main_t *km = &ikev2_main;
2533 u32 thread_index = vlib_get_thread_index ();
2535 from = vlib_frame_vector_args (frame);
2536 n_left_from = frame->n_vectors;
2537 next_index = node->cached_next_index;
2539 while (n_left_from > 0)
2543 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2545 while (n_left_from > 0 && n_left_to_next > 0)
2549 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2554 ikev2_sa_t *sa0 = 0;
2555 ikev2_sa_t sa; /* temporary store for SA */
2557 int r, is_req = 0, has_non_esp_marker = 0;
2559 /* speculatively enqueue b0 to the current next frame */
2565 n_left_to_next -= 1;
2567 b0 = vlib_get_buffer (vm, bi0);
2569 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2571 u8 *ptr = vlib_buffer_get_current (b0);
2572 ip40 = (ip4_header_t *) ptr;
2573 ptr += sizeof (*ip40);
2574 udp0 = (udp_header_t *) ptr;
2575 ptr += sizeof (*udp0);
2576 ike0 = (ike_header_t *) ptr;
2580 ike0 = vlib_buffer_get_current (b0);
2581 vlib_buffer_advance (b0, -sizeof (*udp0));
2582 udp0 = vlib_buffer_get_current (b0);
2583 vlib_buffer_advance (b0, -sizeof (*ip40));
2584 ip40 = vlib_buffer_get_current (b0);
2587 /* check for non-esp marker */
2588 if (*((u32 *) ike0) == 0)
2590 ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32));
2591 has_non_esp_marker = 1;
2594 if (ike0->version != IKE_VERSION_2)
2596 vlib_node_increment_counter (vm, ikev2_node.index,
2597 IKEV2_ERROR_NOT_IKEV2, 1);
2601 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2604 clib_memset (sa0, 0, sizeof (*sa0));
2606 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2608 if (ike0->rspi == 0)
2610 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2611 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2612 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2614 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2618 vlib_node_increment_counter (vm, ikev2_node.index,
2619 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2621 len = clib_net_to_host_u32 (ike0->length);
2626 vlib_node_increment_counter (vm, ikev2_node.index,
2627 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2632 ikev2_process_sa_init_req (vm, sa0, ike0, udp0);
2634 if (sa0->state == IKEV2_STATE_SA_INIT)
2636 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2638 ikev2_select_proposal (sa0->i_proposals,
2639 IKEV2_PROTOCOL_IKE);
2640 ikev2_generate_sa_init_data (sa0);
2643 if (sa0->state == IKEV2_STATE_SA_INIT
2644 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2646 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2649 if (sa0->state == IKEV2_STATE_SA_INIT)
2651 /* add SA to the pool */
2652 pool_get (km->per_thread_data[thread_index].sas,
2654 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2655 ikev2_init_sa (vm, sa0);
2657 per_thread_data[thread_index].sa_by_rspi,
2660 km->per_thread_data[thread_index].sas);
2664 ikev2_sa_free_all_vec (sa0);
2668 else //received sa_init without initiator flag
2670 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2671 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2672 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0);
2674 if (sa0->state == IKEV2_STATE_SA_INIT)
2677 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2678 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2682 pool_elt_at_index (km->sais, p[0]);
2684 if (clib_atomic_bool_cmp_and_swap
2685 (&sai->init_response_received, 0, 1))
2687 ikev2_complete_sa_data (sa0, sai);
2688 ikev2_calc_keys (sa0);
2689 ikev2_sa_auth_init (sa0);
2691 ikev2_generate_message (sa0, ike0, 0, udp0);
2695 /* we've already processed sa-init response */
2696 sa0->state = IKEV2_STATE_UNKNOWN;
2701 if (sa0->state == IKEV2_STATE_SA_INIT)
2703 /* add SA to the pool */
2704 pool_get (km->per_thread_data[thread_index].sas, sa0);
2705 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2706 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2708 sa0 - km->per_thread_data[thread_index].sas);
2712 ikev2_sa_free_all_vec (sa0);
2716 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2719 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2720 clib_net_to_host_u64 (ike0->rspi));
2724 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2727 r = ikev2_retransmit_resp (sa0, ike0);
2730 vlib_node_increment_counter (vm, ikev2_node.index,
2731 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2733 len = clib_net_to_host_u32 (ike0->length);
2738 vlib_node_increment_counter (vm, ikev2_node.index,
2739 IKEV2_ERROR_IKE_REQ_IGNORE,
2744 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2745 ikev2_process_auth_req (vm, sa0, ike0);
2746 ikev2_sa_auth (sa0);
2747 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2749 ikev2_initial_contact_cleanup (sa0);
2750 ikev2_sa_match_ts (sa0);
2751 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2752 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2757 if (sa0->is_initiator)
2759 ikev2_del_sa_init (ike0->ispi);
2763 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2767 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2770 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2771 clib_net_to_host_u64 (ike0->rspi));
2775 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2778 r = ikev2_retransmit_resp (sa0, ike0);
2781 vlib_node_increment_counter (vm, ikev2_node.index,
2782 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2784 len = clib_net_to_host_u32 (ike0->length);
2789 vlib_node_increment_counter (vm, ikev2_node.index,
2790 IKEV2_ERROR_IKE_REQ_IGNORE,
2795 ikev2_process_informational_req (vm, sa0, ike0);
2798 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2800 ikev2_delete_t *d, *tmp, *resp = 0;
2801 vec_foreach (d, sa0->del)
2803 ikev2_child_sa_t *ch_sa;
2804 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2806 !sa0->is_initiator);
2809 ikev2_delete_tunnel_interface (km->vnet_main,
2811 if (!sa0->is_initiator)
2813 vec_add2 (resp, tmp, 1);
2814 tmp->protocol_id = d->protocol_id;
2815 tmp->spi = ch_sa->r_proposals[0].spi;
2817 ikev2_sa_del_child_sa (sa0, ch_sa);
2820 if (!sa0->is_initiator)
2822 vec_free (sa0->del);
2827 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2829 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2830 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2834 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2837 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2838 clib_net_to_host_u64 (ike0->rspi));
2842 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2845 r = ikev2_retransmit_resp (sa0, ike0);
2848 vlib_node_increment_counter (vm, ikev2_node.index,
2849 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2851 len = clib_net_to_host_u32 (ike0->length);
2856 vlib_node_increment_counter (vm, ikev2_node.index,
2857 IKEV2_ERROR_IKE_REQ_IGNORE,
2862 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2865 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2868 ikev2_sa_free_all_child_sa (&sa0->childs);
2869 ikev2_child_sa_t *child;
2870 vec_add2 (sa0->childs, child, 1);
2871 clib_memset (child, 0, sizeof (*child));
2872 child->r_proposals = sa0->rekey[0].r_proposal;
2873 child->i_proposals = sa0->rekey[0].i_proposal;
2874 child->tsi = sa0->rekey[0].tsi;
2875 child->tsr = sa0->rekey[0].tsr;
2876 ikev2_create_tunnel_interface (vm, thread_index,
2878 child - sa0->childs,
2881 if (sa0->is_initiator)
2883 vec_free (sa0->rekey);
2887 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2894 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2895 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2897 ip40->src_address.as_u32,
2898 ip40->dst_address.as_u32);
2902 /* if we are sending packet back, rewrite headers */
2905 next0 = IKEV2_NEXT_IP4_LOOKUP;
2906 if (sa0->is_initiator)
2908 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2909 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2913 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2914 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2919 udp0->dst_port = udp0->src_port =
2920 clib_net_to_host_u16 (ikev2_get_port (sa0));
2922 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2925 if (!has_non_esp_marker)
2926 len = ikev2_insert_non_esp_marker (ike0, len);
2931 if (has_non_esp_marker)
2932 len += sizeof (ikev2_non_esp_marker);
2934 u16 tp = udp0->dst_port;
2935 udp0->dst_port = udp0->src_port;
2936 udp0->src_port = tp;
2940 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2942 b0->current_length =
2943 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2944 ip40->length = clib_host_to_net_u16 (b0->current_length);
2945 ip40->checksum = ip4_header_checksum (ip40);
2948 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2949 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2951 ikev2_child_sa_t *c;
2953 vec_foreach (c, sa0->childs)
2954 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2956 ikev2_delete_sa (sa0);
2958 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2960 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2961 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2963 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2964 t->sw_if_index = sw_if_index0;
2965 t->next_index = next0;
2968 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2969 n_left_to_next, bi0, next0);
2972 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2975 vlib_node_increment_counter (vm, ikev2_node.index,
2976 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2977 return frame->n_vectors;
2981 VLIB_REGISTER_NODE (ikev2_node,static) = {
2982 .function = ikev2_node_fn,
2984 .vector_size = sizeof (u32),
2985 .format_trace = format_ikev2_trace,
2986 .type = VLIB_NODE_TYPE_INTERNAL,
2988 .n_errors = ARRAY_LEN(ikev2_error_strings),
2989 .error_strings = ikev2_error_strings,
2991 .n_next_nodes = IKEV2_N_NEXT,
2994 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2995 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
3000 // set ikev2 proposals when vpp is used as initiator
3001 static clib_error_t *
3002 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3003 ikev2_transforms_set * ts,
3004 ikev2_sa_proposal_t ** proposals, int is_ike)
3007 ikev2_main_t *km = &ikev2_main;
3008 ikev2_sa_proposal_t *proposal;
3009 vec_add2 (*proposals, proposal, 1);
3010 ikev2_sa_transform_t *td;
3015 vec_foreach (td, km->supported_transforms)
3017 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3018 && td->encr_type == ts->crypto_alg
3019 && td->key_len == ts->crypto_key_size / 8)
3022 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3023 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3024 vec_add (td->attrs, (u8 *) attr, 4);
3025 vec_add1 (proposal->transforms, *td);
3034 r = clib_error_return (0, "Unsupported algorithm");
3038 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3042 vec_foreach (td, km->supported_transforms)
3044 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3045 && td->integ_type == ts->integ_alg)
3047 vec_add1 (proposal->transforms, *td);
3055 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3056 r = clib_error_return (0, "Unsupported algorithm");
3065 vec_foreach (td, km->supported_transforms)
3067 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3068 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3070 vec_add1 (proposal->transforms, *td);
3077 r = clib_error_return (0, "Unsupported algorithm");
3086 vec_foreach (td, km->supported_transforms)
3088 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3090 vec_add1 (proposal->transforms, *td);
3093 sa->dh_group = td->dh_type;
3101 r = clib_error_return (0, "Unsupported algorithm");
3109 vec_foreach (td, km->supported_transforms)
3111 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3113 vec_add1 (proposal->transforms, *td);
3119 r = clib_error_return (0, "Unsupported algorithm");
3128 static ikev2_profile_t *
3129 ikev2_profile_index_by_name (u8 * name)
3131 ikev2_main_t *km = &ikev2_main;
3134 p = mhash_get (&km->profile_index_by_name, name);
3138 return pool_elt_at_index (km->profiles, p[0]);
3143 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3144 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3152 b0 = vlib_get_buffer (vm, bi0);
3153 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3154 udp0 = vlib_buffer_get_current (b0);
3155 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3156 ip40 = vlib_buffer_get_current (b0);
3159 ip40->ip_version_and_header_length = 0x45;
3161 ip40->fragment_id = 0;
3162 ip40->flags_and_fragment_offset = 0;
3164 ip40->protocol = IP_PROTOCOL_UDP;
3165 ip40->dst_address.as_u32 = dst->as_u32;
3166 ip40->src_address.as_u32 = src->as_u32;
3167 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3168 udp0->src_port = clib_host_to_net_u16 (src_port);
3169 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3171 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3172 ip40->length = clib_host_to_net_u16 (b0->current_length);
3173 ip40->checksum = ip4_header_checksum (ip40);
3175 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3176 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3178 /* send the request */
3179 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3180 to_next = vlib_frame_vector_args (f);
3183 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3188 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3191 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3196 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3197 *ike = vlib_buffer_get_current (b0);
3202 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3204 ikev2_main_t *km = &ikev2_main;
3206 km->pkey = ikev2_load_key_file (file);
3207 if (km->pkey == NULL)
3208 return clib_error_return (0, "load key '%s' failed", file);
3213 static_always_inline vnet_api_error_t
3214 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3216 ikev2_main_t *km = &ikev2_main;
3217 udp_dst_port_info_t *pi;
3219 uword *v = hash_get (km->udp_ports, port);
3220 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3224 /* IKE already uses this port, only increment reference counter */
3231 return VNET_API_ERROR_UDP_PORT_TAKEN;
3233 udp_register_dst_port (km->vlib_main, port,
3234 ipsec4_tun_input_node.index, 1);
3235 hash_set (km->udp_ports, port, 1);
3237 p->ipsec_over_udp_port = port;
3241 static_always_inline void
3242 ikev2_unregister_udp_port (ikev2_profile_t * p)
3244 ikev2_main_t *km = &ikev2_main;
3247 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3250 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3258 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3259 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3262 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3266 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3267 ikev2_main_per_thread_data_t * tkm,
3270 ikev2_main_t *km = &ikev2_main;
3271 ip4_address_t *src, *dst;
3273 /* Create the Initiator notification for IKE SA removal */
3278 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3281 ikev2_log_error ("buffer alloc failure");
3285 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3286 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3287 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3288 vec_resize (sa->del, 1);
3289 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3290 sa->del->spi = sa->ispi;
3291 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3292 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3293 len = ikev2_generate_message (sa, ike0, 0, 0);
3295 if (sa->is_initiator)
3306 ikev2_send_ike (vm, src, dst, bi0, len,
3307 ikev2_get_port (sa), sa->dst_port, 0);
3309 /* delete local SA */
3310 ikev2_child_sa_t *c;
3311 vec_foreach (c, sa->childs)
3312 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3314 u64 rspi = sa->rspi;
3315 ikev2_sa_free_all_vec (sa);
3316 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3319 hash_unset (tkm->sa_by_rspi, rspi);
3320 pool_put (tkm->sas, sa);
3325 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3327 ikev2_main_per_thread_data_t *tkm;
3329 u32 pi = p - km->profiles;
3333 vec_foreach (tkm, km->per_thread_data)
3336 pool_foreach (sa, tkm->sas, ({
3337 if (sa->profile_index != ~0 && pi == sa->profile_index)
3338 vec_add1 (del_sai, sa - tkm->sas);
3342 vec_foreach (sai, del_sai)
3344 sa = pool_elt_at_index (tkm->sas, sai[0]);
3345 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3348 vec_reset_length (del_sai);
3355 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3357 ikev2_main_t *km = &ikev2_main;
3362 if (ikev2_profile_index_by_name (name))
3363 return clib_error_return (0, "policy %v already exists", name);
3365 pool_get (km->profiles, p);
3366 clib_memset (p, 0, sizeof (*p));
3367 p->name = vec_dup (name);
3368 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3369 p->responder.sw_if_index = ~0;
3371 uword index = p - km->profiles;
3372 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3376 p = ikev2_profile_index_by_name (name);
3378 return clib_error_return (0, "policy %v does not exists", name);
3380 ikev2_unregister_udp_port (p);
3381 ikev2_cleanup_profile_sessions (km, p);
3384 pool_put (km->profiles, p);
3385 mhash_unset (&km->profile_index_by_name, name, 0);
3391 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3392 u8 * auth_data, u8 data_hex_format)
3397 p = ikev2_profile_index_by_name (name);
3401 r = clib_error_return (0, "unknown profile %v", name);
3404 vec_free (p->auth.data);
3405 p->auth.method = auth_method;
3406 p->auth.data = vec_dup (auth_data);
3407 p->auth.hex = data_hex_format;
3409 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3411 vec_add1 (p->auth.data, 0);
3413 EVP_PKEY_free (p->auth.key);
3414 p->auth.key = ikev2_load_cert_file (p->auth.data);
3415 if (p->auth.key == NULL)
3416 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3423 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3429 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3430 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3432 r = clib_error_return (0, "unsupported identity type %U",
3433 format_ikev2_id_type, id_type);
3437 p = ikev2_profile_index_by_name (name);
3441 r = clib_error_return (0, "unknown profile %v", name);
3447 vec_free (p->loc_id.data);
3448 p->loc_id.type = id_type;
3449 p->loc_id.data = vec_dup (data);
3453 vec_free (p->rem_id.data);
3454 p->rem_id.type = id_type;
3455 p->rem_id.data = vec_dup (data);
3462 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3463 u16 start_port, u16 end_port, ip4_address_t start_addr,
3464 ip4_address_t end_addr, int is_local)
3469 p = ikev2_profile_index_by_name (name);
3473 r = clib_error_return (0, "unknown profile %v", name);
3479 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3480 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3481 p->loc_ts.start_port = start_port;
3482 p->loc_ts.end_port = end_port;
3483 p->loc_ts.protocol_id = protocol_id;
3484 p->loc_ts.ts_type = 7;
3488 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3489 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3490 p->rem_ts.start_port = start_port;
3491 p->rem_ts.end_port = end_port;
3492 p->rem_ts.protocol_id = protocol_id;
3493 p->rem_ts.ts_type = 7;
3501 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3502 u32 sw_if_index, ip4_address_t ip4)
3507 p = ikev2_profile_index_by_name (name);
3511 r = clib_error_return (0, "unknown profile %v", name);
3515 p->responder.sw_if_index = sw_if_index;
3516 p->responder.ip4 = ip4;
3522 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3523 ikev2_transform_encr_type_t crypto_alg,
3524 ikev2_transform_integ_type_t integ_alg,
3525 ikev2_transform_dh_type_t dh_type,
3526 u32 crypto_key_size)
3531 p = ikev2_profile_index_by_name (name);
3535 r = clib_error_return (0, "unknown profile %v", name);
3539 p->ike_ts.crypto_alg = crypto_alg;
3540 p->ike_ts.integ_alg = integ_alg;
3541 p->ike_ts.dh_type = dh_type;
3542 p->ike_ts.crypto_key_size = crypto_key_size;
3547 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3548 ikev2_transform_encr_type_t crypto_alg,
3549 ikev2_transform_integ_type_t integ_alg,
3550 u32 crypto_key_size)
3555 p = ikev2_profile_index_by_name (name);
3559 r = clib_error_return (0, "unknown profile %v", name);
3563 p->esp_ts.crypto_alg = crypto_alg;
3564 p->esp_ts.integ_alg = integ_alg;
3565 p->esp_ts.crypto_key_size = crypto_key_size;
3570 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3571 u8 * name, u32 sw_if_index)
3576 p = ikev2_profile_index_by_name (name);
3580 r = clib_error_return (0, "unknown profile %v", name);
3584 p->tun_itf = sw_if_index;
3590 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3593 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3594 ikev2_main_t *km = &ikev2_main;
3595 vnet_api_error_t rv = 0;
3599 return VNET_API_ERROR_INVALID_VALUE;
3603 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3604 return VNET_API_ERROR_VALUE_EXIST;
3606 rv = ikev2_register_udp_port (p, port);
3610 v = hash_get (km->udp_ports, port);
3612 return VNET_API_ERROR_IKE_NO_PORT;
3614 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3615 return VNET_API_ERROR_INVALID_VALUE;
3617 ikev2_unregister_udp_port (p);
3623 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3625 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3630 r = clib_error_return (0, "unknown profile %v", name);
3639 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3640 u64 lifetime, u32 jitter, u32 handover,
3646 p = ikev2_profile_index_by_name (name);
3650 r = clib_error_return (0, "unknown profile %v", name);
3654 p->lifetime = lifetime;
3655 p->lifetime_jitter = jitter;
3656 p->handover = handover;
3657 p->lifetime_maxdata = maxdata;
3662 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3666 ip4_main_t *im = &ip4_main;
3667 ikev2_main_t *km = &ikev2_main;
3669 p = ikev2_profile_index_by_name (name);
3673 r = clib_error_return (0, "unknown profile %v", name);
3677 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3679 r = clib_error_return (0, "responder not set for profile %v", name);
3684 /* Create the Initiator Request */
3688 ip_lookup_main_t *lm = &im->lookup_main;
3690 int len = sizeof (ike_header_t);
3692 /* Get own iface IP */
3694 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3695 ip_interface_address_t *if_add =
3696 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3697 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3699 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3702 char *errmsg = "buffer alloc failure";
3703 ikev2_log_error (errmsg);
3704 return clib_error_return (0, errmsg);
3707 /* Prepare the SA and the IKE payload */
3709 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3710 ikev2_payload_chain_t *chain = 0;
3711 ikev2_payload_new_chain (chain);
3713 /* Build the IKE proposal payload */
3714 ikev2_sa_proposal_t *proposals = 0;
3715 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3716 proposals[0].proposal_num = 1;
3717 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3719 /* Add and then cleanup proposal data */
3720 ikev2_payload_add_sa (chain, proposals);
3721 ikev2_sa_free_proposal_vector (&proposals);
3723 sa.is_initiator = 1;
3724 sa.profile_index = p - km->profiles;
3725 sa.state = IKEV2_STATE_SA_INIT;
3726 sa.tun_itf = p->tun_itf;
3727 sa.udp_encap = p->udp_encap;
3728 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3729 sa.is_tun_itf_set = 1;
3730 sa.initial_contact = 1;
3731 sa.dst_port = IKEV2_PORT;
3732 ikev2_generate_sa_init_data (&sa);
3733 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3734 ikev2_payload_add_nonce (chain, sa.i_nonce);
3736 /* Build the child SA proposal */
3737 vec_resize (sa.childs, 1);
3738 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3739 &sa.childs[0].i_proposals, 0);
3740 sa.childs[0].i_proposals[0].proposal_num = 1;
3741 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3742 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3743 sizeof (sa.childs[0].i_proposals[0].spi));
3745 /* Add NAT detection notification messages (mandatory) */
3746 u8 *nat_detection_sha1 =
3747 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3748 clib_host_to_net_u64 (sa.rspi),
3749 clib_host_to_net_u32 (if_ip->as_u32),
3750 clib_host_to_net_u16 (IKEV2_PORT));
3752 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3753 nat_detection_sha1);
3754 vec_free (nat_detection_sha1);
3755 nat_detection_sha1 =
3756 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3757 clib_host_to_net_u64 (sa.rspi),
3758 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3759 clib_host_to_net_u16 (sa.dst_port));
3760 ikev2_payload_add_notify (chain,
3761 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3762 nat_detection_sha1);
3763 vec_free (nat_detection_sha1);
3765 u8 *sig_hash_algo = vec_new (u8, 8);
3766 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3767 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3768 ikev2_payload_add_notify (chain,
3769 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3771 vec_free (sig_hash_algo);
3774 /* Buffer update and boilerplate */
3775 len += vec_len (chain->data);
3776 ike0->nextpayload = chain->first_payload_type;
3777 ike0->length = clib_host_to_net_u32 (len);
3778 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3779 ikev2_payload_destroy_chain (chain);
3781 ike0->version = IKE_VERSION_2;
3782 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3783 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3784 ike0->ispi = sa.ispi;
3788 /* store whole IKE payload - needed for PSK auth */
3789 vec_free (sa.last_sa_init_req_packet_data);
3790 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3792 /* add data to the SA then add it to the pool */
3793 sa.iaddr.as_u32 = if_ip->as_u32;
3794 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3795 sa.i_id.type = p->loc_id.type;
3796 sa.i_id.data = vec_dup (p->loc_id.data);
3797 sa.r_id.type = p->rem_id.type;
3798 sa.r_id.data = vec_dup (p->rem_id.data);
3799 sa.i_auth.method = p->auth.method;
3800 sa.i_auth.hex = p->auth.hex;
3801 sa.i_auth.data = vec_dup (p->auth.data);
3802 sa.sw_if_index = p->responder.sw_if_index;
3803 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3804 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3806 ikev2_initial_contact_cleanup (&sa);
3808 /* add SA to the pool */
3809 ikev2_sa_t *sa0 = 0;
3810 pool_get (km->sais, sa0);
3811 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3812 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3814 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3815 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3817 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3818 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3819 p->responder.ip4.as_u32);
3826 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3827 ikev2_child_sa_t * csa)
3829 /* Create the Initiator notification for child SA removal */
3830 ikev2_main_t *km = &ikev2_main;
3835 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3838 ikev2_log_error ("buffer alloc failure");
3842 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3843 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3844 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3845 vec_resize (sa->del, 1);
3846 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3847 sa->del->spi = csa->i_proposals->spi;
3848 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3849 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3850 len = ikev2_generate_message (sa, ike0, 0, 0);
3852 len = ikev2_insert_non_esp_marker (ike0, len);
3853 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3854 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3856 /* delete local child SA */
3857 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3858 ikev2_sa_del_child_sa (sa, csa);
3862 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3865 ikev2_main_t *km = &ikev2_main;
3866 ikev2_main_per_thread_data_t *tkm;
3867 ikev2_sa_t *fsa = 0;
3868 ikev2_child_sa_t *fchild = 0;
3870 /* Search for the child SA */
3871 vec_foreach (tkm, km->per_thread_data)
3877 pool_foreach (sa, tkm->sas, ({
3878 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3888 if (!fchild || !fsa)
3890 r = clib_error_return (0, "Child SA not found");
3895 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3902 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3905 ikev2_main_t *km = &ikev2_main;
3906 ikev2_main_per_thread_data_t *tkm;
3907 ikev2_sa_t *fsa = 0;
3908 ikev2_main_per_thread_data_t *ftkm = 0;
3910 /* Search for the IKE SA */
3911 vec_foreach (tkm, km->per_thread_data)
3917 pool_foreach (sa, tkm->sas, ({
3918 if (sa->ispi == ispi)
3930 r = clib_error_return (0, "IKE SA not found");
3934 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3939 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3940 ikev2_child_sa_t * csa)
3942 /* Create the Initiator request for create child SA */
3947 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3950 ikev2_log_error ("buffer alloc failure");
3954 ike0->version = IKE_VERSION_2;
3955 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3956 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3957 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3958 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3959 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3960 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3962 ikev2_rekey_t *rekey;
3963 vec_add2 (sa->rekey, rekey, 1);
3964 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3967 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3968 rekey->spi = proposals[0].spi;
3969 rekey->ispi = csa->i_proposals->spi;
3970 len = ikev2_generate_message (sa, ike0, proposals, 0);
3972 len = ikev2_insert_non_esp_marker (ike0, len);
3973 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3974 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3975 vec_free (proposals);
3979 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3982 ikev2_main_t *km = &ikev2_main;
3983 ikev2_main_per_thread_data_t *tkm;
3984 ikev2_sa_t *fsa = 0;
3985 ikev2_child_sa_t *fchild = 0;
3987 /* Search for the child SA */
3988 vec_foreach (tkm, km->per_thread_data)
3994 pool_foreach (sa, tkm->sas, ({
3995 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4005 if (!fchild || !fsa)
4007 r = clib_error_return (0, "Child SA not found");
4012 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4019 ikev2_init (vlib_main_t * vm)
4021 ikev2_main_t *km = &ikev2_main;
4022 vlib_thread_main_t *tm = vlib_get_thread_main ();
4025 clib_memset (km, 0, sizeof (ikev2_main_t));
4026 km->vnet_main = vnet_get_main ();
4029 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4030 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4031 ikev2_crypto_init (km);
4033 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4035 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4036 CLIB_CACHE_LINE_BYTES);
4037 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4039 ikev2_main_per_thread_data_t *ptd =
4040 vec_elt_at_index (km->per_thread_data, thread_id);
4042 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4044 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4045 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4046 ptd->hmac_ctx = HMAC_CTX_new ();
4048 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4049 ptd->evp_ctx = &ptd->_evp_ctx;
4050 HMAC_CTX_init (&(ptd->_hmac_ctx));
4051 ptd->hmac_ctx = &ptd->_hmac_ctx;
4055 km->sa_by_ispi = hash_create (0, sizeof (uword));
4056 km->sw_if_indices = hash_create (0, 0);
4057 km->udp_ports = hash_create (0, sizeof (uword));
4059 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4060 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4062 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4063 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4065 ikev2_cli_reference ();
4067 km->log_level = IKEV2_LOG_ERROR;
4068 km->log_class = vlib_log_register_class ("ikev2", 0);
4073 VLIB_INIT_FUNCTION (ikev2_init) =
4075 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4080 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4083 ikev2_main_t *km = &ikev2_main;
4084 ikev2_profile_t *p = 0;
4085 vlib_main_t *vm = km->vlib_main;
4086 f64 now = vlib_time_now (vm);
4089 if (sa->profile_index != ~0)
4090 p = pool_elt_at_index (km->profiles, sa->profile_index);
4092 if (sa->is_initiator && p && csa->time_to_expiration
4093 && now > csa->time_to_expiration)
4095 if (!csa->is_expired || csa->rekey_retries > 0)
4097 ikev2_rekey_child_sa_internal (vm, sa, csa);
4098 csa->time_to_expiration = now + p->handover;
4099 csa->is_expired = 1;
4100 if (csa->rekey_retries == 0)
4102 csa->rekey_retries = 5;
4104 else if (csa->rekey_retries > 0)
4106 csa->rekey_retries--;
4107 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4108 csa->i_proposals->spi, csa->rekey_retries);
4109 if (csa->rekey_retries == 0)
4111 csa->rekey_retries = -1;
4118 csa->time_to_expiration = 0;
4119 ikev2_delete_child_sa_internal (vm, sa, csa);
4127 ipip_tunnel_t *ipip = NULL;
4128 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4129 if (~0 == sw_if_index)
4131 ip46_address_t local_ip;
4132 ip46_address_t remote_ip;
4133 if (sa->is_initiator)
4135 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4136 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4140 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4141 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4145 ipip_tunnel_key_t key = {
4148 .transport = IPIP_TRANSPORT_IP4,
4153 ipip = ipip_tunnel_db_find (&key);
4156 sw_if_index = ipip->sw_if_index;
4162 vec_add1 (sas_in, csa->remote_sa_id);
4163 vlib_worker_thread_barrier_sync (vm);
4164 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4165 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4166 vlib_worker_thread_barrier_release (vm);
4173 ikev2_set_log_level (ikev2_log_level_t log_level)
4175 ikev2_main_t *km = &ikev2_main;
4177 if (log_level >= IKEV2_LOG_MAX)
4179 ikev2_log_error ("unknown logging level %d", log_level);
4183 km->log_level = log_level;
4188 ikev2_set_liveness_params (u32 period, u32 max_retries)
4190 ikev2_main_t *km = &ikev2_main;
4192 if (period == 0 || max_retries == 0)
4193 return clib_error_return (0, "invalid args");
4195 km->liveness_period = period;
4196 km->liveness_max_retries = max_retries;
4201 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4203 ikev2_main_t *km = &ikev2_main;
4204 vlib_main_t *vm = km->vlib_main;
4205 ikev2_main_per_thread_data_t *tkm;
4206 ikev2_sa_t *fsa = 0;
4207 ikev2_profile_t *p = 0;
4208 ikev2_child_sa_t *fchild = 0;
4209 f64 now = vlib_time_now (vm);
4210 vlib_counter_t counts;
4212 /* Search for the SA and child SA */
4213 vec_foreach (tkm, km->per_thread_data)
4219 pool_foreach (sa, tkm->sas, ({
4220 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4229 vlib_get_combined_counter (&ipsec_sa_counters,
4230 ipsec_sa->stat_index, &counts);
4232 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4233 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4235 if (fchild && p && p->lifetime_maxdata)
4237 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4239 fchild->time_to_expiration = now;
4245 ikev2_process_pending_sa_init (ikev2_main_t * km)
4252 hash_foreach (ispi, sai, km->sa_by_ispi,
4254 sa = pool_elt_at_index (km->sais, sai);
4255 if (sa->init_response_received)
4259 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4262 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4263 clib_memcpy_fast (vlib_buffer_get_current (b),
4264 sa->last_sa_init_req_packet_data,
4265 vec_len (sa->last_sa_init_req_packet_data));
4266 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4267 vec_len (sa->last_sa_init_req_packet_data),
4268 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4273 static vlib_node_registration_t ikev2_mngr_process_node;
4276 ikev2_send_informational_request (ikev2_sa_t * sa)
4278 ikev2_main_t *km = &ikev2_main;
4279 ip4_address_t *src, *dst;
4285 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4288 ikev2_log_error ("buffer alloc failure");
4292 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4293 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4294 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4295 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4296 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4297 len = ikev2_generate_message (sa, ike0, 0, 0);
4299 len = ikev2_insert_non_esp_marker (ike0, len);
4301 if (sa->is_initiator)
4312 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4313 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4317 static_always_inline int
4318 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4320 ikev2_main_t *km = &ikev2_main;
4321 vlib_main_t *vm = km->vlib_main;
4323 if (!sa->sk_ai || !sa->sk_ar)
4326 if (sa->liveness_retries >= km->liveness_max_retries)
4329 f64 now = vlib_time_now (vm);
4331 if (sa->liveness_period_check < now)
4333 sa->liveness_retries++;
4334 sa->liveness_period_check = now + km->liveness_period;
4335 ikev2_send_informational_request (sa);
4341 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4344 ikev2_main_t *km = &ikev2_main;
4345 ipsec_main_t *im = &ipsec_main;
4347 ikev2_child_sa_t *c;
4353 vlib_process_wait_for_event_or_clock (vm, 1);
4354 vlib_process_get_events (vm, NULL);
4356 /* process ike child sas */
4357 ikev2_main_per_thread_data_t *tkm;
4358 vec_foreach (tkm, km->per_thread_data)
4361 u32 *to_be_deleted = 0;
4364 pool_foreach (sa, tkm->sas, ({
4365 ikev2_child_sa_t *c;
4367 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4369 sa->old_remote_id_present = 0;
4373 sa->old_id_expiration -= 1;
4375 vec_foreach (c, sa->childs)
4377 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4380 if (ikev2_mngr_process_responder_sas (sa))
4381 vec_add1 (to_be_deleted, sa - tkm->sas);
4385 vec_foreach (sai, to_be_deleted)
4387 sa = pool_elt_at_index (tkm->sas, sai[0]);
4388 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4389 vec_foreach (c, sa->childs)
4391 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4392 ikev2_sa_del_child_sa (sa, c);
4394 ikev2_sa_free_all_vec (sa);
4395 hash_unset (tkm->sa_by_rspi, sa->rspi);
4396 pool_put (tkm->sas, sa);
4400 p = pool_elt_at_index (km->profiles, sa->profile_index);
4403 ikev2_initiate_sa_init (vm, p->name);
4407 vec_free (to_be_deleted);
4410 /* process ipsec sas */
4413 pool_foreach (sa, im->sad, ({
4414 ikev2_mngr_process_ipsec_sa(sa);
4418 ikev2_process_pending_sa_init (km);
4422 vlib_process_wait_for_event_or_clock (vm, 5);
4423 vlib_process_get_events (vm, NULL);
4432 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4433 .function = ikev2_mngr_process_fn,
4434 .type = VLIB_NODE_TYPE_PROCESS,
4436 "ikev2-manager-process",
4439 VLIB_PLUGIN_REGISTER () = {
4440 .version = VPP_BUILD_VER,
4441 .description = "Internet Key Exchange (IKEv2) Protocol",
4446 * fd.io coding-style-patch-verification: ON
4449 * eval: (c-set-style "gnu")