2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received")
77 #define _(sym,str) IKEV2_ERROR_##sym,
83 static char *ikev2_error_strings[] = {
84 #define _(sym,string) string,
91 IKEV2_NEXT_IP4_LOOKUP,
92 IKEV2_NEXT_ERROR_DROP,
96 typedef u32 ikev2_non_esp_marker;
98 static_always_inline u16
99 ikev2_get_port (ikev2_sa_t * sa)
101 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
104 static_always_inline int
105 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
107 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
108 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
109 return len + sizeof (ikev2_non_esp_marker);
112 static ikev2_sa_transform_t *
113 ikev2_find_transform_data (ikev2_sa_transform_t * t)
115 ikev2_main_t *km = &ikev2_main;
116 ikev2_sa_transform_t *td;
118 vec_foreach (td, km->supported_transforms)
120 if (td->type != t->type)
123 if (td->transform_id != t->transform_id)
126 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
128 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
129 || t->attrs[1] != 14)
132 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
140 static ikev2_sa_proposal_t *
141 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
142 ikev2_protocol_id_t prot_id)
144 ikev2_sa_proposal_t *rv = 0;
145 ikev2_sa_proposal_t *proposal;
146 ikev2_sa_transform_t *transform, *new_t;
147 u8 mandatory_bitmap, optional_bitmap;
149 if (prot_id == IKEV2_PROTOCOL_IKE)
151 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
152 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
153 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
154 optional_bitmap = mandatory_bitmap;
156 else if (prot_id == IKEV2_PROTOCOL_ESP)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_ESN);
160 optional_bitmap = mandatory_bitmap |
161 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
163 else if (prot_id == IKEV2_PROTOCOL_AH)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
166 (1 << IKEV2_TRANSFORM_TYPE_ESN);
167 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
172 vec_add2 (rv, proposal, 1);
174 vec_foreach (proposal, proposals)
177 if (proposal->protocol_id != prot_id)
180 vec_foreach (transform, proposal->transforms)
182 if ((1 << transform->type) & bitmap)
185 if (ikev2_find_transform_data (transform))
187 bitmap |= 1 << transform->type;
188 vec_add2 (rv->transforms, new_t, 1);
189 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
190 new_t->attrs = vec_dup (transform->attrs);
194 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
195 (bitmap & ~optional_bitmap) == 0)
197 rv->proposal_num = proposal->proposal_num;
198 rv->protocol_id = proposal->protocol_id;
199 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
204 vec_free (rv->transforms);
213 ikev2_sa_transform_t *
214 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
215 ikev2_transform_type_t type)
217 ikev2_sa_transform_t *t;
222 vec_foreach (t, p->transforms)
225 return ikev2_find_transform_data (t);
231 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
235 vec_foreach (c, sa->childs)
237 ikev2_sa_proposal_t *proposal =
238 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
239 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
247 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
249 ikev2_sa_proposal_t *p;
250 ikev2_sa_transform_t *t;
257 vec_foreach (t, p->transforms)
261 vec_free (p->transforms);
267 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
269 ikev2_sa_free_proposal_vector (&c->r_proposals);
270 ikev2_sa_free_proposal_vector (&c->i_proposals);
280 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
283 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
289 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
291 ikev2_sa_free_child_sa (child);
292 vec_del1 (sa->childs, child - sa->childs);
296 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
298 vec_free (sa->i_nonce);
299 vec_free (sa->i_dh_data);
300 vec_free (sa->dh_shared_key);
301 vec_free (sa->dh_private_key);
303 ikev2_sa_free_proposal_vector (&sa->r_proposals);
304 ikev2_sa_free_proposal_vector (&sa->i_proposals);
307 vec_free (sa->sk_ai);
308 vec_free (sa->sk_ar);
309 vec_free (sa->sk_ei);
310 vec_free (sa->sk_er);
311 vec_free (sa->sk_pi);
312 vec_free (sa->sk_pr);
314 vec_free (sa->i_id.data);
315 vec_free (sa->i_auth.data);
316 vec_free (sa->r_id.data);
317 vec_free (sa->r_auth.data);
319 EVP_PKEY_free (sa->r_auth.key);
323 ikev2_sa_free_all_child_sa (&sa->childs);
327 ikev2_delete_sa (ikev2_sa_t * sa)
329 ikev2_main_t *km = &ikev2_main;
330 u32 thread_index = vlib_get_thread_index ();
333 ikev2_sa_free_all_vec (sa);
335 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
338 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
339 pool_put (km->per_thread_data[thread_index].sas, sa);
344 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
346 ikev2_sa_transform_t *t = 0, *t2;
347 ikev2_main_t *km = &ikev2_main;
349 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
354 /* check if received DH group is on our list of supported groups */
355 vec_foreach (t2, km->supported_transforms)
357 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
366 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
370 if (sa->is_initiator)
373 RAND_bytes ((u8 *) & sa->ispi, 8);
376 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
377 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
382 RAND_bytes ((u8 *) & sa->rspi, 8);
385 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
386 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
389 /* generate dh keys */
390 ikev2_generate_dh (sa, t);
395 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
397 ikev2_sa_transform_t *t = 0, *t2;
398 ikev2_main_t *km = &ikev2_main;
400 /*move some data to the new SA */
401 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
402 sa->i_nonce = _(sai->i_nonce);
403 sa->i_dh_data = _(sai->i_dh_data);
404 sa->dh_private_key = _(sai->dh_private_key);
405 sa->iaddr.as_u32 = sai->iaddr.as_u32;
406 sa->raddr.as_u32 = sai->raddr.as_u32;
407 sa->is_initiator = sai->is_initiator;
408 sa->i_id.type = sai->i_id.type;
409 sa->r_id.type = sai->r_id.type;
410 sa->profile_index = sai->profile_index;
411 sa->tun_itf = sai->tun_itf;
412 sa->is_tun_itf_set = sai->is_tun_itf_set;
413 sa->i_id.data = _(sai->i_id.data);
414 sa->r_id.data = _(sai->r_id.data);
415 sa->i_auth.method = sai->i_auth.method;
416 sa->i_auth.hex = sai->i_auth.hex;
417 sa->i_auth.data = _(sai->i_auth.data);
418 sa->i_auth.key = _(sai->i_auth.key);
419 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
420 sa->childs = _(sai->childs);
421 sa->udp_encap = sai->udp_encap;
422 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
423 sa->dst_port = sai->dst_port;
424 sa->sw_if_index = sai->sw_if_index;
428 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
433 /* check if received DH group is on our list of supported groups */
434 vec_foreach (t2, km->supported_transforms)
436 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
445 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
450 /* generate dh keys */
451 ikev2_complete_dh (sa, t);
456 ikev2_calc_keys (ikev2_sa_t * sa)
459 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
462 u16 integ_key_len = 0;
463 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
465 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
467 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
469 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
472 integ_key_len = tr_integ->key_len;
474 vec_append (s, sa->i_nonce);
475 vec_append (s, sa->r_nonce);
476 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
478 /* Calculate S = Ni | Nr | SPIi | SPIr */
480 vec_add2 (s, tmp, 2 * sizeof (*spi));
482 spi[0] = clib_host_to_net_u64 (sa->ispi);
483 spi[1] = clib_host_to_net_u64 (sa->rspi);
485 /* calculate PRFplus */
487 int len = tr_prf->key_trunc + /* SK_d */
488 integ_key_len * 2 + /* SK_ai, SK_ar */
489 tr_encr->key_len * 2 + /* SK_ei, SK_er */
490 tr_prf->key_len * 2; /* SK_pi, SK_pr */
492 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
499 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
500 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
501 pos += tr_prf->key_trunc;
506 sa->sk_ai = vec_new (u8, integ_key_len);
507 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
508 pos += integ_key_len;
511 sa->sk_ar = vec_new (u8, integ_key_len);
512 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
513 pos += integ_key_len;
517 sa->sk_ei = vec_new (u8, tr_encr->key_len);
518 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
519 pos += tr_encr->key_len;
522 sa->sk_er = vec_new (u8, tr_encr->key_len);
523 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
524 pos += tr_encr->key_len;
527 sa->sk_pi = vec_new (u8, tr_prf->key_len);
528 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
529 pos += tr_prf->key_len;
532 sa->sk_pr = vec_new (u8, tr_prf->key_len);
533 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
534 pos += tr_prf->key_len;
540 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
543 u16 integ_key_len = 0;
546 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
548 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
550 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
552 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
555 integ_key_len = ctr_integ->key_len;
557 salt_len = sizeof (u32);
559 vec_append (s, sa->i_nonce);
560 vec_append (s, sa->r_nonce);
561 /* calculate PRFplus */
563 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
565 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
570 child->sk_ei = vec_new (u8, ctr_encr->key_len);
571 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
572 pos += ctr_encr->key_len;
577 child->sk_ai = vec_new (u8, ctr_integ->key_len);
578 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
579 pos += ctr_integ->key_len;
583 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
588 child->sk_er = vec_new (u8, ctr_encr->key_len);
589 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
590 pos += ctr_encr->key_len;
595 child->sk_ar = vec_new (u8, integ_key_len);
596 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
597 pos += integ_key_len;
601 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
610 static_always_inline u8 *
611 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
613 /* ispi, rspi, ip, port */
614 u8 buf[8 + 8 + 4 + 2];
615 u8 *res = vec_new (u8, 20);
617 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
618 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
619 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
620 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
621 SHA1 (buf, sizeof (buf), res);
626 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
627 ike_header_t * ike, udp_header_t * udp)
630 u32 len = clib_net_to_host_u32 (ike->length);
631 u8 payload = ike->nextpayload;
633 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
635 clib_net_to_host_u64 (ike->ispi),
636 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
638 sa->ispi = clib_net_to_host_u64 (ike->ispi);
640 /* store whole IKE payload - needed for PSK auth */
641 vec_free (sa->last_sa_init_req_packet_data);
642 vec_add (sa->last_sa_init_req_packet_data, ike, len);
644 while (p < len && payload != IKEV2_PAYLOAD_NONE)
646 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
647 u32 plen = clib_net_to_host_u16 (ikep->length);
649 if (plen < sizeof (ike_payload_header_t))
652 if (payload == IKEV2_PAYLOAD_SA)
654 ikev2_sa_free_proposal_vector (&sa->i_proposals);
655 sa->i_proposals = ikev2_parse_sa_payload (ikep);
657 else if (payload == IKEV2_PAYLOAD_KE)
659 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
660 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
661 vec_free (sa->i_dh_data);
662 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
664 else if (payload == IKEV2_PAYLOAD_NONCE)
666 vec_free (sa->i_nonce);
667 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
669 else if (payload == IKEV2_PAYLOAD_NOTIFY)
671 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
672 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
675 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
676 clib_net_to_host_u32 (sa->
679 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
682 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
683 " behind NAT", sa->ispi);
687 else if (n->msg_type ==
688 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
691 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
692 clib_net_to_host_u32 (sa->
695 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
698 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
699 " (self) behind NAT", sa->ispi);
705 else if (payload == IKEV2_PAYLOAD_VENDOR)
707 ikev2_parse_vendor_payload (ikep);
711 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
713 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
715 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
716 sa->unsupported_cp = payload;
721 payload = ikep->nextpayload;
725 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
729 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
730 ike_header_t * ike, udp_header_t * udp)
733 u32 len = clib_net_to_host_u32 (ike->length);
734 u8 payload = ike->nextpayload;
736 sa->ispi = clib_net_to_host_u64 (ike->ispi);
737 sa->rspi = clib_net_to_host_u64 (ike->rspi);
739 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
740 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
743 /* store whole IKE payload - needed for PSK auth */
744 vec_free (sa->last_sa_init_res_packet_data);
745 vec_add (sa->last_sa_init_res_packet_data, ike, len);
747 while (p < len && payload != IKEV2_PAYLOAD_NONE)
749 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
750 u32 plen = clib_net_to_host_u16 (ikep->length);
752 if (plen < sizeof (ike_payload_header_t))
755 if (payload == IKEV2_PAYLOAD_SA)
757 ikev2_sa_free_proposal_vector (&sa->r_proposals);
758 sa->r_proposals = ikev2_parse_sa_payload (ikep);
761 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
763 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
766 else if (payload == IKEV2_PAYLOAD_KE)
768 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
769 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
770 vec_free (sa->r_dh_data);
771 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
773 else if (payload == IKEV2_PAYLOAD_NONCE)
775 vec_free (sa->r_nonce);
776 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
778 else if (payload == IKEV2_PAYLOAD_NOTIFY)
780 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
781 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
783 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
788 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
790 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
791 " behind NAT, unsupported", sa->ispi);
795 else if (n->msg_type ==
796 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
798 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
802 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
805 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
806 " (self) behind NAT", sa->ispi);
812 else if (payload == IKEV2_PAYLOAD_VENDOR)
814 ikev2_parse_vendor_payload (ikep);
818 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
820 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
822 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
823 sa->unsupported_cp = payload;
828 payload = ikep->nextpayload;
834 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
839 u32 len = clib_net_to_host_u32 (ike->length);
840 ike_payload_header_t *ikep = 0;
842 ikev2_sa_transform_t *tr_integ;
844 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
846 if (!sa->sk_ar || !sa->sk_ai)
850 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
852 ikep = (ike_payload_header_t *) & ike->payload[p];
853 plen = clib_net_to_host_u16 (ikep->length);
855 if (plen < sizeof (*ikep))
858 if (*payload == IKEV2_PAYLOAD_SK)
860 last_payload = *payload;
864 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
866 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
868 sa->unsupported_cp = *payload;
873 *payload = ikep->nextpayload;
877 if (last_payload != IKEV2_PAYLOAD_SK)
879 ikev2_elog_error ("Last payload must be SK");
884 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
885 (u8 *) ike, len - tr_integ->key_trunc);
887 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
889 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
891 ikev2_elog_error ("message integrity check failed");
897 return ikev2_decrypt_data (sa, ikep->payload, plen);
900 static_always_inline int
901 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
903 if (i1->type != i2->type)
906 if (vec_len (i1->data) != vec_len (i2->data))
909 if (memcmp (i1->data, i2->data, vec_len (i1->data)))
916 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
918 ikev2_main_t *km = &ikev2_main;
922 u32 thread_index = vlib_get_thread_index ();
924 if (!sa->initial_contact)
927 /* find old IKE SAs with the same authenticated identity */
929 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
930 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
931 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
934 if (sa->rspi != tmp->rspi)
935 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
939 for (i = 0; i < vec_len (delete); i++)
942 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
944 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
946 ikev2_delete_sa (tmp);
950 sa->initial_contact = 0;
954 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
956 ikev2_child_sa_t *first_child_sa;
958 u8 payload = ike->nextpayload;
960 ike_payload_header_t *ikep;
963 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
964 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
965 clib_host_to_net_u64 (ike->rspi),
966 sa->is_initiator ? sa->raddr.as_u32 : sa->
969 ikev2_calc_keys (sa);
971 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
975 if (sa->unsupported_cp)
976 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
977 goto cleanup_and_exit;
980 /* select or create 1st child SA */
981 if (sa->is_initiator)
983 first_child_sa = &sa->childs[0];
987 ikev2_sa_free_all_child_sa (&sa->childs);
988 vec_add2 (sa->childs, first_child_sa, 1);
992 /* process encrypted payload */
994 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
996 ikep = (ike_payload_header_t *) & plaintext[p];
997 plen = clib_net_to_host_u16 (ikep->length);
999 if (plen < sizeof (ike_payload_header_t))
1000 goto cleanup_and_exit;
1002 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1004 if (sa->is_initiator)
1006 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1007 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
1011 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1012 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1015 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1017 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1019 sa->i_id.type = id->id_type;
1020 vec_free (sa->i_id.data);
1021 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1023 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1025 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1027 sa->r_id.type = id->id_type;
1028 vec_free (sa->r_id.data);
1029 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1031 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1033 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1035 if (sa->is_initiator)
1037 sa->r_auth.method = a->auth_method;
1038 vec_free (sa->r_auth.data);
1039 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1043 sa->i_auth.method = a->auth_method;
1044 vec_free (sa->i_auth.data);
1045 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1048 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1050 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1051 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1053 sa->initial_contact = 1;
1057 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1059 ikev2_parse_vendor_payload (ikep);
1061 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1063 vec_free (first_child_sa->tsi);
1064 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1066 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1068 vec_free (first_child_sa->tsr);
1069 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1073 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1076 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1078 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1079 sa->unsupported_cp = payload;
1084 payload = ikep->nextpayload;
1089 vec_free (plaintext);
1093 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1097 u8 payload = ike->nextpayload;
1099 ike_payload_header_t *ikep;
1102 sa->liveness_retries = 0;
1103 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1104 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1105 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1107 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1110 goto cleanup_and_exit;
1112 /* process encrypted payload */
1114 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1116 ikep = (ike_payload_header_t *) & plaintext[p];
1117 plen = clib_net_to_host_u16 (ikep->length);
1119 if (plen < sizeof (ike_payload_header_t))
1120 goto cleanup_and_exit;
1122 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1124 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1125 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1126 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1129 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1131 sa->del = ikev2_parse_delete_payload (ikep);
1133 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1135 ikev2_parse_vendor_payload (ikep);
1139 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1141 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1143 sa->unsupported_cp = payload;
1148 payload = ikep->nextpayload;
1153 vec_free (plaintext);
1157 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1161 u8 payload = ike->nextpayload;
1164 u8 nonce[IKEV2_NONCE_SIZE];
1166 ike_payload_header_t *ikep;
1168 ikev2_notify_t *n = 0;
1169 ikev2_ts_t *tsi = 0;
1170 ikev2_ts_t *tsr = 0;
1171 ikev2_sa_proposal_t *proposal = 0;
1172 ikev2_child_sa_t *child_sa;
1174 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1175 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1176 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1178 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1181 goto cleanup_and_exit;
1183 /* process encrypted payload */
1185 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1187 ikep = (ike_payload_header_t *) & plaintext[p];
1188 plen = clib_net_to_host_u16 (ikep->length);
1190 if (plen < sizeof (ike_payload_header_t))
1191 goto cleanup_and_exit;
1193 else if (payload == IKEV2_PAYLOAD_SA)
1195 proposal = ikev2_parse_sa_payload (ikep);
1197 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1199 n = ikev2_parse_notify_payload (ikep);
1200 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1205 else if (payload == IKEV2_PAYLOAD_DELETE)
1207 sa->del = ikev2_parse_delete_payload (ikep);
1209 else if (payload == IKEV2_PAYLOAD_VENDOR)
1211 ikev2_parse_vendor_payload (ikep);
1213 else if (payload == IKEV2_PAYLOAD_NONCE)
1215 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1217 else if (payload == IKEV2_PAYLOAD_TSI)
1219 tsi = ikev2_parse_ts_payload (ikep);
1221 else if (payload == IKEV2_PAYLOAD_TSR)
1223 tsr = ikev2_parse_ts_payload (ikep);
1227 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1229 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1231 sa->unsupported_cp = payload;
1232 goto cleanup_and_exit;
1236 payload = ikep->nextpayload;
1240 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1242 ikev2_rekey_t *rekey = &sa->rekey[0];
1243 rekey->protocol_id = proposal->protocol_id;
1245 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1246 rekey->i_proposal->spi = rekey->spi;
1247 rekey->r_proposal = proposal;
1251 vec_free (sa->r_nonce);
1252 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1253 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1256 child_sa->rekey_retries = 0;
1261 ikev2_rekey_t *rekey;
1262 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1265 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1267 goto cleanup_and_exit;
1269 vec_add2 (sa->rekey, rekey, 1);
1270 rekey->protocol_id = n->protocol_id;
1271 rekey->spi = n->spi;
1272 rekey->i_proposal = proposal;
1274 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1278 vec_free (sa->i_nonce);
1279 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1280 /* generate new Nr */
1281 vec_free (sa->r_nonce);
1282 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1283 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1287 vec_free (plaintext);
1292 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1300 ikev2_sa_transform_t *tr_prf;
1303 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1309 nonce = sa->i_nonce;
1310 packet_data = sa->last_sa_init_res_packet_data;
1316 nonce = sa->r_nonce;
1317 packet_data = sa->last_sa_init_req_packet_data;
1320 data = vec_new (u8, 4);
1322 vec_append (data, id->data);
1324 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1325 vec_append (authmsg, packet_data);
1326 vec_append (authmsg, nonce);
1327 vec_append (authmsg, id_hash);
1335 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1337 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1338 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1339 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1340 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1347 ikev2_sa_match_ts (ikev2_sa_t * sa)
1349 ikev2_main_t *km = &ikev2_main;
1351 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1352 ikev2_id_t *id_rem, *id_loc;
1355 pool_foreach (p, km->profiles, ({
1357 if (sa->is_initiator)
1373 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1374 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1377 sa->profile_index = p - km->profiles;
1379 vec_foreach(ts, sa->childs[0].tsi)
1381 if (ikev2_ts_cmp(p_tsi, ts))
1383 vec_add1 (tsi, ts[0]);
1388 vec_foreach(ts, sa->childs[0].tsr)
1390 if (ikev2_ts_cmp(p_tsr, ts))
1392 vec_add1 (tsr, ts[0]);
1403 vec_free (sa->childs[0].tsi);
1404 vec_free (sa->childs[0].tsr);
1405 sa->childs[0].tsi = tsi;
1406 sa->childs[0].tsr = tsr;
1412 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1417 ikev2_sa_auth (ikev2_sa_t * sa)
1419 ikev2_main_t *km = &ikev2_main;
1420 ikev2_profile_t *p, *sel_p = 0;
1421 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1422 ikev2_sa_transform_t *tr_prf;
1425 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1427 /* only shared key and rsa signature */
1428 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1429 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1431 ikev2_elog_uint (IKEV2_LOG_ERROR,
1432 "unsupported authentication method %u",
1434 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1438 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1439 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1441 ikev2_id_t *id_rem, *id_loc;
1442 ikev2_auth_t *sa_auth;
1444 if (sa->is_initiator)
1448 sa_auth = &sa->r_auth;
1454 sa_auth = &sa->i_auth;
1458 pool_foreach (p, km->profiles, ({
1461 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1462 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1465 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1467 if (!p->auth.data ||
1468 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1471 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1472 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1474 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1476 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1483 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1485 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1488 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1490 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1503 sa->udp_encap = sel_p->udp_encap;
1504 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1508 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1510 if (!sa->is_initiator)
1512 vec_free (sa->r_id.data);
1513 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1514 sa->r_id.type = sel_p->loc_id.type;
1515 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1516 sa->i_id.type = sel_p->rem_id.type;
1518 /* generate our auth data */
1519 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1520 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1522 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1523 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1525 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1527 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1528 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1532 /* select transforms for 1st child sa */
1533 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1534 sa->childs[0].r_proposals =
1535 ikev2_select_proposal (sa->childs[0].i_proposals,
1536 IKEV2_PROTOCOL_ESP);
1538 if (~0 != sel_p->tun_itf)
1540 sa->is_tun_itf_set = 1;
1541 sa->tun_itf = sel_p->tun_itf;
1547 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1548 "profile found! ispi %lx", sa->ispi);
1549 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1557 ikev2_sa_auth_init (ikev2_sa_t * sa)
1559 ikev2_main_t *km = &ikev2_main;
1560 u8 *authmsg, *key_pad, *psk = 0;
1561 ikev2_sa_transform_t *tr_prf;
1564 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1566 /* only shared key and rsa signature */
1567 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1568 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1570 ikev2_elog_uint (IKEV2_LOG_ERROR,
1571 "unsupported authentication method %u",
1573 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1577 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1578 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1579 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1581 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1583 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1584 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1586 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1588 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1589 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1598 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1600 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1604 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1606 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1616 ipsec_sa_flags_t flags;
1619 ipsec_crypto_alg_t encr_type;
1620 ipsec_integ_alg_t integ_type;
1621 ip46_address_t local_ip;
1622 ip46_address_t remote_ip;
1623 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1625 u32 old_remote_sa_id;
1626 u16 ipsec_over_udp_port;
1629 } ikev2_add_ipsec_tunnel_args_t;
1632 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1634 ikev2_main_t *km = &ikev2_main;
1638 if (~0 == a->sw_if_index)
1640 /* no tunnel associated with the SA/profile - create a new one */
1641 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1642 &a->local_ip, &a->remote_ip, 0,
1643 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1644 TUNNEL_MODE_P2P, &sw_if_index);
1646 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1648 if (hash_get (km->sw_if_indices, sw_if_index))
1649 /* interface is managed by IKE; proceed with updating SAs */
1652 hash_set1 (km->sw_if_indices, sw_if_index);
1656 sw_if_index = a->sw_if_index;
1657 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1662 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1663 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1664 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1669 vec_add1 (sas_in, a->remote_sa_id);
1672 ipsec_tun_protect_del (sw_if_index, NULL);
1674 /* replace local SA immediately */
1675 ipsec_sa_unlock_id (a->local_sa_id);
1677 /* keep the old sa */
1678 vec_add1 (sas_in, a->old_remote_sa_id);
1681 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1683 IPSEC_PROTOCOL_ESP, a->encr_type,
1684 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1685 a->flags, 0, a->salt_local, &a->local_ip,
1686 &a->remote_ip, NULL, a->src_port, a->dst_port);
1687 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1688 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1689 a->integ_type, &a->rem_ikey,
1690 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1691 a->salt_remote, &a->remote_ip,
1692 &a->local_ip, NULL, a->ipsec_over_udp_port,
1693 a->ipsec_over_udp_port);
1695 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1699 ikev2_create_tunnel_interface (vlib_main_t * vm,
1702 ikev2_child_sa_t * child, u32 sa_index,
1703 u32 child_index, u8 is_rekey)
1705 ikev2_main_t *km = &ikev2_main;
1706 ipsec_crypto_alg_t encr_type;
1707 ipsec_integ_alg_t integ_type;
1708 ikev2_profile_t *p = 0;
1709 ikev2_sa_transform_t *tr;
1710 ikev2_sa_proposal_t *proposals;
1712 ikev2_add_ipsec_tunnel_args_t a;
1714 clib_memset (&a, 0, sizeof (a));
1716 if (!child->r_proposals)
1718 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1722 if (sa->is_initiator)
1724 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1725 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1726 proposals = child->i_proposals;
1727 a.local_spi = child->r_proposals[0].spi;
1728 a.remote_spi = child->i_proposals[0].spi;
1732 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1733 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1734 proposals = child->r_proposals;
1735 a.local_spi = child->i_proposals[0].spi;
1736 a.remote_spi = child->r_proposals[0].spi;
1739 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1742 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1743 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1746 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1747 a.is_rekey = is_rekey;
1749 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1750 if (tr && tr->esn_type)
1751 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1753 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1756 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1758 switch (tr->key_len)
1761 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1764 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1767 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1770 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1775 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1778 switch (tr->key_len)
1781 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1784 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1787 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1790 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1798 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1804 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1807 a.encr_type = encr_type;
1811 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1814 switch (tr->integ_type)
1816 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1817 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1819 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1820 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1822 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1823 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1825 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1826 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1829 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1835 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1841 integ_type = IPSEC_INTEG_ALG_NONE;
1844 a.integ_type = integ_type;
1845 ikev2_calc_child_keys (sa, child);
1847 if (sa->is_initiator)
1849 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1850 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1851 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1852 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1855 a.salt_remote = child->salt_er;
1856 a.salt_local = child->salt_ei;
1858 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1862 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1863 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1864 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1865 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1868 a.salt_remote = child->salt_ei;
1869 a.salt_local = child->salt_er;
1871 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1872 a.src_port = sa->ipsec_over_udp_port;
1875 if (sa->is_initiator && sa->profile_index != ~0)
1876 p = pool_elt_at_index (km->profiles, sa->profile_index);
1878 if (p && p->lifetime)
1880 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1881 if (p->lifetime_jitter)
1883 // This is not much better than rand(3), which Coverity warns
1884 // is unsuitable for security applications; random_u32 is
1885 // however fast. If this perturbance to the expiration time
1886 // needs to use a better RNG then we may need to use something
1887 // like /dev/urandom which has significant overhead.
1888 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1889 rnd = random_u32 (&rnd);
1891 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1895 if (thread_index & 0xffffffc0)
1896 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1898 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1899 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1901 child->local_sa_id =
1903 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1905 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1910 /* create a new remote SA ID to keep the old SA for a bit longer
1911 * so the peer has some time to swap their SAs */
1913 /* use most significat bit of child index part in id */
1915 if (sa->current_remote_id_mask)
1917 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1918 sa->current_remote_id_mask = 0;
1922 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1923 sa->current_remote_id_mask = mask;
1924 remote_sa_id |= mask;
1926 sa->old_id_expiration = 3.0;
1927 sa->old_remote_id_present = 1;
1930 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1932 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1933 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1935 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1936 (u8 *) & a, sizeof (a));
1942 ip46_address_t local_ip;
1943 ip46_address_t remote_ip;
1947 } ikev2_del_ipsec_tunnel_args_t;
1949 static_always_inline u32
1950 ikev2_flip_alternate_sa_bit (u32 id)
1959 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1961 ikev2_main_t *km = &ikev2_main;
1962 ipip_tunnel_t *ipip = NULL;
1965 if (~0 == a->sw_if_index)
1968 ipip_tunnel_key_t key = {
1970 .dst = a->remote_ip,
1971 .transport = IPIP_TRANSPORT_IP4,
1976 ipip = ipip_tunnel_db_find (&key);
1980 sw_if_index = ipip->sw_if_index;
1981 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1988 sw_if_index = a->sw_if_index;
1989 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
1992 if (~0 != sw_if_index)
1993 ipsec_tun_protect_del (sw_if_index, NULL);
1995 ipsec_sa_unlock_id (a->remote_sa_id);
1996 ipsec_sa_unlock_id (a->local_sa_id);
1997 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2000 ipip_del_tunnel (ipip->sw_if_index);
2004 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2005 ikev2_child_sa_t * child)
2007 ikev2_del_ipsec_tunnel_args_t a;
2009 clib_memset (&a, 0, sizeof (a));
2011 if (sa->is_initiator)
2013 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2014 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2018 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2019 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2022 a.remote_sa_id = child->remote_sa_id;
2023 a.local_sa_id = child->local_sa_id;
2024 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2026 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2032 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2036 ike_payload_header_t *ph;
2040 ikev2_sa_transform_t *tr_encr, *tr_integ;
2042 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2044 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2046 ikev2_payload_chain_t *chain = 0;
2047 ikev2_payload_new_chain (chain);
2049 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2051 if (sa->r_proposals == 0)
2053 ikev2_payload_add_notify (chain,
2054 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2055 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2057 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2059 u8 *data = vec_new (u8, 2);
2060 ikev2_sa_transform_t *tr_dh;
2062 ikev2_sa_get_td_for_type (sa->r_proposals,
2063 IKEV2_TRANSFORM_TYPE_DH);
2064 ASSERT (tr_dh && tr_dh->dh_type);
2066 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2067 data[1] = (tr_dh->dh_type) & 0xff;
2069 ikev2_payload_add_notify (chain,
2070 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2073 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2075 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2077 u8 *data = vec_new (u8, 1);
2079 data[0] = sa->unsupported_cp;
2080 ikev2_payload_add_notify (chain,
2081 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2089 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2090 ikev2_payload_add_sa (chain, sa->r_proposals);
2091 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2092 ikev2_payload_add_nonce (chain, sa->r_nonce);
2094 u8 *nat_detection_sha1 =
2095 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2096 clib_host_to_net_u64 (sa->rspi),
2097 clib_host_to_net_u32 (sa->raddr.as_u32),
2099 ikev2_payload_add_notify (chain,
2100 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2101 nat_detection_sha1);
2102 vec_free (nat_detection_sha1);
2103 nat_detection_sha1 =
2104 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2105 clib_host_to_net_u64 (sa->rspi),
2106 sa->iaddr.as_u32, udp->src_port);
2107 ikev2_payload_add_notify (chain,
2108 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2109 nat_detection_sha1);
2110 vec_free (nat_detection_sha1);
2113 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2115 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2117 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2118 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2119 ikev2_payload_add_auth (chain, &sa->r_auth);
2120 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2121 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2122 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2124 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2126 ikev2_payload_add_notify (chain,
2127 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2129 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2131 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2133 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2135 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2136 ikev2_payload_add_auth (chain, &sa->r_auth);
2138 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2140 ikev2_payload_add_notify (chain,
2141 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2142 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2143 ikev2_payload_add_auth (chain, &sa->r_auth);
2144 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2145 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2147 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2149 u8 *data = vec_new (u8, 1);
2151 data[0] = sa->unsupported_cp;
2152 ikev2_payload_add_notify (chain,
2153 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2157 else if (sa->state == IKEV2_STATE_SA_INIT)
2159 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2160 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2161 ikev2_payload_add_auth (chain, &sa->i_auth);
2162 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2163 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2164 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2165 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2170 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2174 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2176 /* if pending delete */
2179 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2181 if (sa->is_initiator)
2182 ikev2_payload_add_delete (chain, sa->del);
2184 /* The response to a request that deletes the IKE SA is an empty
2185 INFORMATIONAL response. */
2186 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2188 /* The response to a request that deletes ESP or AH SAs will contain
2189 delete payloads for the paired SAs going in the other direction. */
2192 ikev2_payload_add_delete (chain, sa->del);
2197 /* received N(AUTHENTICATION_FAILED) */
2198 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2200 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2203 /* received unsupported critical payload */
2204 else if (sa->unsupported_cp)
2206 u8 *data = vec_new (u8, 1);
2208 data[0] = sa->unsupported_cp;
2209 ikev2_payload_add_notify (chain,
2210 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2213 sa->unsupported_cp = 0;
2215 /* else send empty response */
2217 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2219 if (sa->is_initiator)
2222 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2223 ikev2_notify_t notify;
2224 u8 *data = vec_new (u8, 4);
2225 clib_memset (¬ify, 0, sizeof (notify));
2226 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2227 notify.spi = sa->childs[0].i_proposals->spi;
2228 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2230 ikev2_payload_add_sa (chain, proposals);
2231 ikev2_payload_add_nonce (chain, sa->i_nonce);
2232 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2233 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2234 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2241 if (vec_len (sa->rekey) > 0)
2243 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2244 ikev2_payload_add_nonce (chain, sa->r_nonce);
2245 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2247 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2249 vec_del1 (sa->rekey, 0);
2251 else if (sa->unsupported_cp)
2253 u8 *data = vec_new (u8, 1);
2255 data[0] = sa->unsupported_cp;
2256 ikev2_payload_add_notify (chain,
2257 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2260 sa->unsupported_cp = 0;
2264 ikev2_payload_add_notify (chain,
2265 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2272 ike->version = IKE_VERSION_2;
2273 ike->nextpayload = IKEV2_PAYLOAD_SK;
2274 tlen = sizeof (*ike);
2275 if (sa->is_initiator)
2277 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2278 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2282 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2286 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2288 tlen += vec_len (chain->data);
2289 ike->nextpayload = chain->first_payload_type;
2290 ike->length = clib_host_to_net_u32 (tlen);
2291 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2293 /* store whole IKE payload - needed for PSK auth */
2294 vec_free (sa->last_sa_init_res_packet_data);
2295 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2300 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2303 plen = sizeof (*ph);
2304 ph = (ike_payload_header_t *) & ike->payload[0];
2305 ph->nextpayload = chain->first_payload_type;
2307 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2310 /* add space for hmac */
2311 plen += tr_integ->key_trunc;
2314 /* payload and total length */
2315 ph->length = clib_host_to_net_u16 (plen);
2316 ike->length = clib_host_to_net_u32 (tlen);
2318 /* calc integrity data for whole packet except hash itself */
2320 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2321 (u8 *) ike, tlen - tr_integ->key_trunc);
2323 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2324 sizeof (*ike), integ, tr_integ->key_trunc);
2326 /* store whole IKE payload - needed for retransmit */
2327 vec_free (sa->last_res_packet_data);
2328 vec_add (sa->last_res_packet_data, ike, tlen);
2332 ikev2_payload_destroy_chain (chain);
2338 ikev2_retransmit_sa_init (ike_header_t * ike,
2339 ip4_address_t iaddr, ip4_address_t raddr)
2341 ikev2_main_t *km = &ikev2_main;
2343 u32 thread_index = vlib_get_thread_index ();
2346 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2347 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2348 sa->iaddr.as_u32 == iaddr.as_u32 &&
2349 sa->raddr.as_u32 == raddr.as_u32)
2352 u32 len = clib_net_to_host_u32(ike->length);
2353 u8 payload = ike->nextpayload;
2355 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2356 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2357 u32 plen = clib_net_to_host_u16(ikep->length);
2359 if (plen < sizeof(ike_payload_header_t))
2362 if (payload == IKEV2_PAYLOAD_NONCE)
2364 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2366 /* req is retransmit */
2367 if (sa->state == IKEV2_STATE_SA_INIT)
2370 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2371 ike->ispi = tmp->ispi;
2372 ike->rspi = tmp->rspi;
2373 ike->nextpayload = tmp->nextpayload;
2374 ike->version = tmp->version;
2375 ike->exchange = tmp->exchange;
2376 ike->flags = tmp->flags;
2377 ike->msgid = tmp->msgid;
2378 ike->length = tmp->length;
2379 clib_memcpy_fast(ike->payload, tmp->payload,
2380 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2381 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2382 "ispi %lx IKE_SA_INIT retransmit "
2383 "from %d.%d.%d.%d to %d.%d.%d.%d",
2385 raddr.as_u32, iaddr.as_u32);
2388 /* else ignore req */
2391 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2392 "ispi %lx IKE_SA_INIT ignore "
2393 "from %d.%d.%d.%d to %d.%d.%d.%d",
2395 raddr.as_u32, iaddr.as_u32);
2400 payload = ikep->nextpayload;
2407 /* req is not retransmit */
2412 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2414 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2417 if (msg_id > sa->last_msg_id)
2419 sa->last_msg_id = msg_id;
2422 /* retransmitted req */
2423 else if (msg_id == sa->last_msg_id)
2426 tmp = (ike_header_t *) sa->last_res_packet_data;
2427 ike->ispi = tmp->ispi;
2428 ike->rspi = tmp->rspi;
2429 ike->nextpayload = tmp->nextpayload;
2430 ike->version = tmp->version;
2431 ike->exchange = tmp->exchange;
2432 ike->flags = tmp->flags;
2433 ike->msgid = tmp->msgid;
2434 ike->length = tmp->length;
2435 clib_memcpy_fast (ike->payload, tmp->payload,
2436 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2437 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2438 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2441 /* old req ignore */
2444 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2445 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2451 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2453 ikev2_main_t *km = &ikev2_main;
2454 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2455 sa->profile_index = ~0;
2459 ikev2_del_sa_init_from_main (u64 * ispi)
2461 ikev2_main_t *km = &ikev2_main;
2462 uword *p = hash_get (km->sa_by_ispi, *ispi);
2465 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2466 hash_unset (km->sa_by_ispi, sai->ispi);
2467 ikev2_sa_free_all_vec (sai);
2468 pool_put (km->sais, sai);
2473 ikev2_del_sa_init (u64 ispi)
2475 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2480 ikev2_node_fn (vlib_main_t * vm,
2481 vlib_node_runtime_t * node, vlib_frame_t * frame)
2483 u32 n_left_from, *from, *to_next;
2484 ikev2_next_t next_index;
2485 ikev2_main_t *km = &ikev2_main;
2486 u32 thread_index = vlib_get_thread_index ();
2488 from = vlib_frame_vector_args (frame);
2489 n_left_from = frame->n_vectors;
2490 next_index = node->cached_next_index;
2492 while (n_left_from > 0)
2496 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2498 while (n_left_from > 0 && n_left_to_next > 0)
2502 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2507 ikev2_sa_t *sa0 = 0;
2508 ikev2_sa_t sa; /* temporary store for SA */
2510 int r, is_req = 0, has_non_esp_marker = 0;
2512 /* speculatively enqueue b0 to the current next frame */
2518 n_left_to_next -= 1;
2520 b0 = vlib_get_buffer (vm, bi0);
2522 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2524 u8 *ptr = vlib_buffer_get_current (b0);
2525 ip40 = (ip4_header_t *) ptr;
2526 ptr += sizeof (*ip40);
2527 udp0 = (udp_header_t *) ptr;
2528 ptr += sizeof (*udp0);
2529 ike0 = (ike_header_t *) ptr;
2533 ike0 = vlib_buffer_get_current (b0);
2534 vlib_buffer_advance (b0, -sizeof (*udp0));
2535 udp0 = vlib_buffer_get_current (b0);
2536 vlib_buffer_advance (b0, -sizeof (*ip40));
2537 ip40 = vlib_buffer_get_current (b0);
2540 /* check for non-esp marker */
2541 if (*((u32 *) ike0) == 0)
2543 ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32));
2544 has_non_esp_marker = 1;
2547 if (ike0->version != IKE_VERSION_2)
2549 vlib_node_increment_counter (vm, ikev2_node.index,
2550 IKEV2_ERROR_NOT_IKEV2, 1);
2554 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2557 clib_memset (sa0, 0, sizeof (*sa0));
2559 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2561 if (ike0->rspi == 0)
2563 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2564 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2565 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2567 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2571 vlib_node_increment_counter (vm, ikev2_node.index,
2572 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2574 len = clib_net_to_host_u32 (ike0->length);
2579 vlib_node_increment_counter (vm, ikev2_node.index,
2580 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2585 ikev2_process_sa_init_req (vm, sa0, ike0, udp0);
2587 if (sa0->state == IKEV2_STATE_SA_INIT)
2589 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2591 ikev2_select_proposal (sa0->i_proposals,
2592 IKEV2_PROTOCOL_IKE);
2593 ikev2_generate_sa_init_data (sa0);
2596 if (sa0->state == IKEV2_STATE_SA_INIT
2597 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2599 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2602 if (sa0->state == IKEV2_STATE_SA_INIT)
2604 /* add SA to the pool */
2605 pool_get (km->per_thread_data[thread_index].sas,
2607 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2608 ikev2_init_sa (vm, sa0);
2610 per_thread_data[thread_index].sa_by_rspi,
2613 km->per_thread_data[thread_index].sas);
2617 ikev2_sa_free_all_vec (sa0);
2621 else //received sa_init without initiator flag
2623 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2624 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2625 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0);
2627 if (sa0->state == IKEV2_STATE_SA_INIT)
2630 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2631 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2635 pool_elt_at_index (km->sais, p[0]);
2637 if (clib_atomic_bool_cmp_and_swap
2638 (&sai->init_response_received, 0, 1))
2640 ikev2_complete_sa_data (sa0, sai);
2641 ikev2_calc_keys (sa0);
2642 ikev2_sa_auth_init (sa0);
2644 ikev2_generate_message (sa0, ike0, 0, udp0);
2648 /* we've already processed sa-init response */
2649 sa0->state = IKEV2_STATE_UNKNOWN;
2654 if (sa0->state == IKEV2_STATE_SA_INIT)
2656 /* add SA to the pool */
2657 pool_get (km->per_thread_data[thread_index].sas, sa0);
2658 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2659 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2661 sa0 - km->per_thread_data[thread_index].sas);
2665 ikev2_sa_free_all_vec (sa0);
2669 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2672 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2673 clib_net_to_host_u64 (ike0->rspi));
2677 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2680 r = ikev2_retransmit_resp (sa0, ike0);
2683 vlib_node_increment_counter (vm, ikev2_node.index,
2684 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2686 len = clib_net_to_host_u32 (ike0->length);
2691 vlib_node_increment_counter (vm, ikev2_node.index,
2692 IKEV2_ERROR_IKE_REQ_IGNORE,
2697 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2698 ikev2_process_auth_req (vm, sa0, ike0);
2699 ikev2_sa_auth (sa0);
2700 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2702 ikev2_initial_contact_cleanup (sa0);
2703 ikev2_sa_match_ts (sa0);
2704 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2705 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2710 if (sa0->is_initiator)
2712 ikev2_del_sa_init (ike0->ispi);
2716 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2720 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2723 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2724 clib_net_to_host_u64 (ike0->rspi));
2728 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2731 r = ikev2_retransmit_resp (sa0, ike0);
2734 vlib_node_increment_counter (vm, ikev2_node.index,
2735 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2737 len = clib_net_to_host_u32 (ike0->length);
2742 vlib_node_increment_counter (vm, ikev2_node.index,
2743 IKEV2_ERROR_IKE_REQ_IGNORE,
2748 ikev2_process_informational_req (vm, sa0, ike0);
2751 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2753 ikev2_delete_t *d, *tmp, *resp = 0;
2754 vec_foreach (d, sa0->del)
2756 ikev2_child_sa_t *ch_sa;
2757 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2759 !sa0->is_initiator);
2762 ikev2_delete_tunnel_interface (km->vnet_main,
2764 if (!sa0->is_initiator)
2766 vec_add2 (resp, tmp, 1);
2767 tmp->protocol_id = d->protocol_id;
2768 tmp->spi = ch_sa->r_proposals[0].spi;
2770 ikev2_sa_del_child_sa (sa0, ch_sa);
2773 if (!sa0->is_initiator)
2775 vec_free (sa0->del);
2780 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2782 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2783 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2787 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2790 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2791 clib_net_to_host_u64 (ike0->rspi));
2795 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2798 r = ikev2_retransmit_resp (sa0, ike0);
2801 vlib_node_increment_counter (vm, ikev2_node.index,
2802 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2804 len = clib_net_to_host_u32 (ike0->length);
2809 vlib_node_increment_counter (vm, ikev2_node.index,
2810 IKEV2_ERROR_IKE_REQ_IGNORE,
2815 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2818 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2821 ikev2_sa_free_all_child_sa (&sa0->childs);
2822 ikev2_child_sa_t *child;
2823 vec_add2 (sa0->childs, child, 1);
2824 clib_memset (child, 0, sizeof (*child));
2825 child->r_proposals = sa0->rekey[0].r_proposal;
2826 child->i_proposals = sa0->rekey[0].i_proposal;
2827 child->tsi = sa0->rekey[0].tsi;
2828 child->tsr = sa0->rekey[0].tsr;
2829 ikev2_create_tunnel_interface (vm, thread_index,
2831 child - sa0->childs,
2834 if (sa0->is_initiator)
2836 vec_free (sa0->rekey);
2840 len = ikev2_generate_message (sa0, ike0, 0, udp0);
2847 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2848 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2850 ip40->src_address.as_u32,
2851 ip40->dst_address.as_u32);
2855 /* if we are sending packet back, rewrite headers */
2858 next0 = IKEV2_NEXT_IP4_LOOKUP;
2859 if (sa0->is_initiator)
2861 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2862 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2866 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2867 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2872 udp0->dst_port = udp0->src_port =
2873 clib_net_to_host_u16 (ikev2_get_port (sa0));
2875 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2878 if (!has_non_esp_marker)
2879 len = ikev2_insert_non_esp_marker (ike0, len);
2884 if (has_non_esp_marker)
2885 len += sizeof (ikev2_non_esp_marker);
2887 u16 tp = udp0->dst_port;
2888 udp0->dst_port = udp0->src_port;
2889 udp0->src_port = tp;
2893 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2895 b0->current_length =
2896 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2897 ip40->length = clib_host_to_net_u16 (b0->current_length);
2898 ip40->checksum = ip4_header_checksum (ip40);
2901 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2902 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2904 ikev2_child_sa_t *c;
2906 vec_foreach (c, sa0->childs)
2907 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2909 ikev2_delete_sa (sa0);
2911 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2913 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2914 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2916 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2917 t->sw_if_index = sw_if_index0;
2918 t->next_index = next0;
2921 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2922 n_left_to_next, bi0, next0);
2925 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2928 vlib_node_increment_counter (vm, ikev2_node.index,
2929 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2930 return frame->n_vectors;
2934 VLIB_REGISTER_NODE (ikev2_node,static) = {
2935 .function = ikev2_node_fn,
2937 .vector_size = sizeof (u32),
2938 .format_trace = format_ikev2_trace,
2939 .type = VLIB_NODE_TYPE_INTERNAL,
2941 .n_errors = ARRAY_LEN(ikev2_error_strings),
2942 .error_strings = ikev2_error_strings,
2944 .n_next_nodes = IKEV2_N_NEXT,
2947 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2948 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2953 // set ikev2 proposals when vpp is used as initiator
2954 static clib_error_t *
2955 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2956 ikev2_transforms_set * ts,
2957 ikev2_sa_proposal_t ** proposals, int is_ike)
2960 ikev2_main_t *km = &ikev2_main;
2961 ikev2_sa_proposal_t *proposal;
2962 vec_add2 (*proposals, proposal, 1);
2963 ikev2_sa_transform_t *td;
2968 vec_foreach (td, km->supported_transforms)
2970 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2971 && td->encr_type == ts->crypto_alg
2972 && td->key_len == ts->crypto_key_size / 8)
2975 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2976 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2977 vec_add (td->attrs, (u8 *) attr, 4);
2978 vec_add1 (proposal->transforms, *td);
2987 r = clib_error_return (0, "Unsupported algorithm");
2991 if (is_ike || IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 != ts->crypto_alg)
2995 vec_foreach (td, km->supported_transforms)
2997 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2998 && td->integ_type == ts->integ_alg)
3000 vec_add1 (proposal->transforms, *td);
3008 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3009 r = clib_error_return (0, "Unsupported algorithm");
3018 vec_foreach (td, km->supported_transforms)
3020 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3021 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3023 vec_add1 (proposal->transforms, *td);
3030 r = clib_error_return (0, "Unsupported algorithm");
3039 vec_foreach (td, km->supported_transforms)
3041 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3043 vec_add1 (proposal->transforms, *td);
3046 sa->dh_group = td->dh_type;
3054 r = clib_error_return (0, "Unsupported algorithm");
3062 vec_foreach (td, km->supported_transforms)
3064 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3066 vec_add1 (proposal->transforms, *td);
3072 r = clib_error_return (0, "Unsupported algorithm");
3081 static ikev2_profile_t *
3082 ikev2_profile_index_by_name (u8 * name)
3084 ikev2_main_t *km = &ikev2_main;
3087 p = mhash_get (&km->profile_index_by_name, name);
3091 return pool_elt_at_index (km->profiles, p[0]);
3096 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3097 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3105 b0 = vlib_get_buffer (vm, bi0);
3106 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3107 udp0 = vlib_buffer_get_current (b0);
3108 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3109 ip40 = vlib_buffer_get_current (b0);
3112 ip40->ip_version_and_header_length = 0x45;
3114 ip40->fragment_id = 0;
3115 ip40->flags_and_fragment_offset = 0;
3117 ip40->protocol = IP_PROTOCOL_UDP;
3118 ip40->dst_address.as_u32 = dst->as_u32;
3119 ip40->src_address.as_u32 = src->as_u32;
3120 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3121 udp0->src_port = clib_host_to_net_u16 (src_port);
3122 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3124 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3125 ip40->length = clib_host_to_net_u16 (b0->current_length);
3126 ip40->checksum = ip4_header_checksum (ip40);
3128 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3129 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3131 /* send the request */
3132 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3133 to_next = vlib_frame_vector_args (f);
3136 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3141 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3144 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3149 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3150 *ike = vlib_buffer_get_current (b0);
3155 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3157 ikev2_main_t *km = &ikev2_main;
3159 km->pkey = ikev2_load_key_file (file);
3160 if (km->pkey == NULL)
3161 return clib_error_return (0, "load key '%s' failed", file);
3166 static_always_inline vnet_api_error_t
3167 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3169 ikev2_main_t *km = &ikev2_main;
3170 udp_dst_port_info_t *pi;
3172 uword *v = hash_get (km->udp_ports, port);
3173 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3177 /* IKE already uses this port, only increment reference counter */
3184 return VNET_API_ERROR_UDP_PORT_TAKEN;
3186 udp_register_dst_port (km->vlib_main, port,
3187 ipsec4_tun_input_node.index, 1);
3188 hash_set (km->udp_ports, port, 1);
3190 p->ipsec_over_udp_port = port;
3194 static_always_inline void
3195 ikev2_unregister_udp_port (ikev2_profile_t * p)
3197 ikev2_main_t *km = &ikev2_main;
3200 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3203 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3211 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3212 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3215 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3219 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3220 ikev2_main_per_thread_data_t * tkm,
3223 ikev2_main_t *km = &ikev2_main;
3224 ip4_address_t *src, *dst;
3226 /* Create the Initiator notification for IKE SA removal */
3231 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3234 ikev2_log_error ("buffer alloc failure");
3238 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3239 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3240 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3241 vec_resize (sa->del, 1);
3242 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3243 sa->del->spi = sa->ispi;
3244 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3245 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3246 len = ikev2_generate_message (sa, ike0, 0, 0);
3248 if (sa->is_initiator)
3259 ikev2_send_ike (vm, src, dst, bi0, len,
3260 ikev2_get_port (sa), sa->dst_port, 0);
3262 /* delete local SA */
3263 ikev2_child_sa_t *c;
3264 vec_foreach (c, sa->childs)
3265 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3267 u64 rspi = sa->rspi;
3268 ikev2_sa_free_all_vec (sa);
3269 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3272 hash_unset (tkm->sa_by_rspi, rspi);
3273 pool_put (tkm->sas, sa);
3278 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3280 ikev2_main_per_thread_data_t *tkm;
3282 u32 pi = p - km->profiles;
3286 vec_foreach (tkm, km->per_thread_data)
3289 pool_foreach (sa, tkm->sas, ({
3290 if (sa->profile_index != ~0 && pi == sa->profile_index)
3291 vec_add1 (del_sai, sa - tkm->sas);
3295 vec_foreach (sai, del_sai)
3297 sa = pool_elt_at_index (tkm->sas, sai[0]);
3298 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3301 vec_reset_length (del_sai);
3308 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3310 ikev2_main_t *km = &ikev2_main;
3315 if (ikev2_profile_index_by_name (name))
3316 return clib_error_return (0, "policy %v already exists", name);
3318 pool_get (km->profiles, p);
3319 clib_memset (p, 0, sizeof (*p));
3320 p->name = vec_dup (name);
3321 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3322 p->responder.sw_if_index = ~0;
3324 uword index = p - km->profiles;
3325 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3329 p = ikev2_profile_index_by_name (name);
3331 return clib_error_return (0, "policy %v does not exists", name);
3333 ikev2_unregister_udp_port (p);
3334 ikev2_cleanup_profile_sessions (km, p);
3337 pool_put (km->profiles, p);
3338 mhash_unset (&km->profile_index_by_name, name, 0);
3344 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3345 u8 * auth_data, u8 data_hex_format)
3350 p = ikev2_profile_index_by_name (name);
3354 r = clib_error_return (0, "unknown profile %v", name);
3357 vec_free (p->auth.data);
3358 p->auth.method = auth_method;
3359 p->auth.data = vec_dup (auth_data);
3360 p->auth.hex = data_hex_format;
3362 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3364 vec_add1 (p->auth.data, 0);
3366 EVP_PKEY_free (p->auth.key);
3367 p->auth.key = ikev2_load_cert_file (auth_data);
3368 if (p->auth.key == NULL)
3369 return clib_error_return (0, "load cert '%s' failed", auth_data);
3376 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3382 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3383 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3385 r = clib_error_return (0, "unsupported identity type %U",
3386 format_ikev2_id_type, id_type);
3390 p = ikev2_profile_index_by_name (name);
3394 r = clib_error_return (0, "unknown profile %v", name);
3400 vec_free (p->loc_id.data);
3401 p->loc_id.type = id_type;
3402 p->loc_id.data = vec_dup (data);
3406 vec_free (p->rem_id.data);
3407 p->rem_id.type = id_type;
3408 p->rem_id.data = vec_dup (data);
3415 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3416 u16 start_port, u16 end_port, ip4_address_t start_addr,
3417 ip4_address_t end_addr, int is_local)
3422 p = ikev2_profile_index_by_name (name);
3426 r = clib_error_return (0, "unknown profile %v", name);
3432 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3433 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3434 p->loc_ts.start_port = start_port;
3435 p->loc_ts.end_port = end_port;
3436 p->loc_ts.protocol_id = protocol_id;
3437 p->loc_ts.ts_type = 7;
3441 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3442 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3443 p->rem_ts.start_port = start_port;
3444 p->rem_ts.end_port = end_port;
3445 p->rem_ts.protocol_id = protocol_id;
3446 p->rem_ts.ts_type = 7;
3454 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3455 u32 sw_if_index, ip4_address_t ip4)
3460 p = ikev2_profile_index_by_name (name);
3464 r = clib_error_return (0, "unknown profile %v", name);
3468 p->responder.sw_if_index = sw_if_index;
3469 p->responder.ip4 = ip4;
3475 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3476 ikev2_transform_encr_type_t crypto_alg,
3477 ikev2_transform_integ_type_t integ_alg,
3478 ikev2_transform_dh_type_t dh_type,
3479 u32 crypto_key_size)
3484 p = ikev2_profile_index_by_name (name);
3488 r = clib_error_return (0, "unknown profile %v", name);
3492 p->ike_ts.crypto_alg = crypto_alg;
3493 p->ike_ts.integ_alg = integ_alg;
3494 p->ike_ts.dh_type = dh_type;
3495 p->ike_ts.crypto_key_size = crypto_key_size;
3500 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3501 ikev2_transform_encr_type_t crypto_alg,
3502 ikev2_transform_integ_type_t integ_alg,
3503 ikev2_transform_dh_type_t dh_type,
3504 u32 crypto_key_size)
3509 p = ikev2_profile_index_by_name (name);
3513 r = clib_error_return (0, "unknown profile %v", name);
3517 p->esp_ts.crypto_alg = crypto_alg;
3518 p->esp_ts.integ_alg = integ_alg;
3519 p->esp_ts.dh_type = dh_type;
3520 p->esp_ts.crypto_key_size = crypto_key_size;
3525 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3526 u8 * name, u32 sw_if_index)
3531 p = ikev2_profile_index_by_name (name);
3535 r = clib_error_return (0, "unknown profile %v", name);
3539 p->tun_itf = sw_if_index;
3545 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3548 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3549 ikev2_main_t *km = &ikev2_main;
3550 vnet_api_error_t rv = 0;
3554 return VNET_API_ERROR_INVALID_VALUE;
3558 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3559 return VNET_API_ERROR_VALUE_EXIST;
3561 rv = ikev2_register_udp_port (p, port);
3565 v = hash_get (km->udp_ports, port);
3567 return VNET_API_ERROR_IKE_NO_PORT;
3569 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3570 return VNET_API_ERROR_INVALID_VALUE;
3572 ikev2_unregister_udp_port (p);
3578 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3580 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3585 r = clib_error_return (0, "unknown profile %v", name);
3594 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3595 u64 lifetime, u32 jitter, u32 handover,
3601 p = ikev2_profile_index_by_name (name);
3605 r = clib_error_return (0, "unknown profile %v", name);
3609 p->lifetime = lifetime;
3610 p->lifetime_jitter = jitter;
3611 p->handover = handover;
3612 p->lifetime_maxdata = maxdata;
3617 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3621 ip4_main_t *im = &ip4_main;
3622 ikev2_main_t *km = &ikev2_main;
3624 p = ikev2_profile_index_by_name (name);
3628 r = clib_error_return (0, "unknown profile %v", name);
3632 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3634 r = clib_error_return (0, "responder not set for profile %v", name);
3639 /* Create the Initiator Request */
3643 ip_lookup_main_t *lm = &im->lookup_main;
3645 int len = sizeof (ike_header_t);
3647 /* Get own iface IP */
3649 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3650 ip_interface_address_t *if_add =
3651 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3652 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3654 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3657 char *errmsg = "buffer alloc failure";
3658 ikev2_log_error (errmsg);
3659 return clib_error_return (0, errmsg);
3662 /* Prepare the SA and the IKE payload */
3664 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3665 ikev2_payload_chain_t *chain = 0;
3666 ikev2_payload_new_chain (chain);
3668 /* Build the IKE proposal payload */
3669 ikev2_sa_proposal_t *proposals = 0;
3670 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3671 proposals[0].proposal_num = 1;
3672 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3674 /* Add and then cleanup proposal data */
3675 ikev2_payload_add_sa (chain, proposals);
3676 ikev2_sa_free_proposal_vector (&proposals);
3678 sa.is_initiator = 1;
3679 sa.profile_index = p - km->profiles;
3680 sa.state = IKEV2_STATE_SA_INIT;
3681 sa.tun_itf = p->tun_itf;
3682 sa.udp_encap = p->udp_encap;
3683 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3684 sa.is_tun_itf_set = 1;
3685 sa.initial_contact = 1;
3686 sa.dst_port = IKEV2_PORT;
3687 ikev2_generate_sa_init_data (&sa);
3688 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3689 ikev2_payload_add_nonce (chain, sa.i_nonce);
3691 /* Build the child SA proposal */
3692 vec_resize (sa.childs, 1);
3693 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3694 &sa.childs[0].i_proposals, 0);
3695 sa.childs[0].i_proposals[0].proposal_num = 1;
3696 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3697 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3698 sizeof (sa.childs[0].i_proposals[0].spi));
3700 /* Add NAT detection notification messages (mandatory) */
3701 u8 *nat_detection_sha1 =
3702 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3703 clib_host_to_net_u64 (sa.rspi),
3704 clib_host_to_net_u32 (if_ip->as_u32),
3705 clib_host_to_net_u16 (IKEV2_PORT));
3707 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3708 nat_detection_sha1);
3709 vec_free (nat_detection_sha1);
3710 nat_detection_sha1 =
3711 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3712 clib_host_to_net_u64 (sa.rspi),
3713 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3714 clib_host_to_net_u16 (sa.dst_port));
3715 ikev2_payload_add_notify (chain,
3716 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3717 nat_detection_sha1);
3718 vec_free (nat_detection_sha1);
3720 u8 *sig_hash_algo = vec_new (u8, 8);
3721 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3722 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3723 ikev2_payload_add_notify (chain,
3724 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3726 vec_free (sig_hash_algo);
3729 /* Buffer update and boilerplate */
3730 len += vec_len (chain->data);
3731 ike0->nextpayload = chain->first_payload_type;
3732 ike0->length = clib_host_to_net_u32 (len);
3733 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3734 ikev2_payload_destroy_chain (chain);
3736 ike0->version = IKE_VERSION_2;
3737 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3738 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3739 ike0->ispi = sa.ispi;
3743 /* store whole IKE payload - needed for PSK auth */
3744 vec_free (sa.last_sa_init_req_packet_data);
3745 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3747 /* add data to the SA then add it to the pool */
3748 sa.iaddr.as_u32 = if_ip->as_u32;
3749 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3750 sa.i_id.type = p->loc_id.type;
3751 sa.i_id.data = vec_dup (p->loc_id.data);
3752 sa.r_id.type = p->rem_id.type;
3753 sa.r_id.data = vec_dup (p->rem_id.data);
3754 sa.i_auth.method = p->auth.method;
3755 sa.i_auth.hex = p->auth.hex;
3756 sa.i_auth.data = vec_dup (p->auth.data);
3757 sa.sw_if_index = p->responder.sw_if_index;
3758 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3759 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3761 ikev2_initial_contact_cleanup (&sa);
3763 /* add SA to the pool */
3764 ikev2_sa_t *sa0 = 0;
3765 pool_get (km->sais, sa0);
3766 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3767 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3769 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3770 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3772 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3773 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3774 p->responder.ip4.as_u32);
3781 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3782 ikev2_child_sa_t * csa)
3784 /* Create the Initiator notification for child SA removal */
3785 ikev2_main_t *km = &ikev2_main;
3790 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3793 ikev2_log_error ("buffer alloc failure");
3797 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3798 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3799 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3800 vec_resize (sa->del, 1);
3801 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3802 sa->del->spi = csa->i_proposals->spi;
3803 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3804 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3805 len = ikev2_generate_message (sa, ike0, 0, 0);
3807 len = ikev2_insert_non_esp_marker (ike0, len);
3808 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3809 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3811 /* delete local child SA */
3812 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3813 ikev2_sa_del_child_sa (sa, csa);
3817 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3820 ikev2_main_t *km = &ikev2_main;
3821 ikev2_main_per_thread_data_t *tkm;
3822 ikev2_sa_t *fsa = 0;
3823 ikev2_child_sa_t *fchild = 0;
3825 /* Search for the child SA */
3826 vec_foreach (tkm, km->per_thread_data)
3832 pool_foreach (sa, tkm->sas, ({
3833 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3843 if (!fchild || !fsa)
3845 r = clib_error_return (0, "Child SA not found");
3850 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3857 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3860 ikev2_main_t *km = &ikev2_main;
3861 ikev2_main_per_thread_data_t *tkm;
3862 ikev2_sa_t *fsa = 0;
3863 ikev2_main_per_thread_data_t *ftkm = 0;
3865 /* Search for the IKE SA */
3866 vec_foreach (tkm, km->per_thread_data)
3872 pool_foreach (sa, tkm->sas, ({
3873 if (sa->ispi == ispi)
3885 r = clib_error_return (0, "IKE SA not found");
3889 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3894 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3895 ikev2_child_sa_t * csa)
3897 /* Create the Initiator request for create child SA */
3902 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3905 ikev2_log_error ("buffer alloc failure");
3909 ike0->version = IKE_VERSION_2;
3910 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3911 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3912 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3913 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3914 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3915 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3917 ikev2_rekey_t *rekey;
3918 vec_add2 (sa->rekey, rekey, 1);
3919 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3922 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3923 rekey->spi = proposals[0].spi;
3924 rekey->ispi = csa->i_proposals->spi;
3925 len = ikev2_generate_message (sa, ike0, proposals, 0);
3927 len = ikev2_insert_non_esp_marker (ike0, len);
3928 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3929 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3930 vec_free (proposals);
3934 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3937 ikev2_main_t *km = &ikev2_main;
3938 ikev2_main_per_thread_data_t *tkm;
3939 ikev2_sa_t *fsa = 0;
3940 ikev2_child_sa_t *fchild = 0;
3942 /* Search for the child SA */
3943 vec_foreach (tkm, km->per_thread_data)
3949 pool_foreach (sa, tkm->sas, ({
3950 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3960 if (!fchild || !fsa)
3962 r = clib_error_return (0, "Child SA not found");
3967 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3974 ikev2_init (vlib_main_t * vm)
3976 ikev2_main_t *km = &ikev2_main;
3977 vlib_thread_main_t *tm = vlib_get_thread_main ();
3980 clib_memset (km, 0, sizeof (ikev2_main_t));
3981 km->vnet_main = vnet_get_main ();
3984 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
3985 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
3986 ikev2_crypto_init (km);
3988 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3990 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
3991 CLIB_CACHE_LINE_BYTES);
3992 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3994 km->per_thread_data[thread_id].sa_by_rspi =
3995 hash_create (0, sizeof (uword));
3998 km->sa_by_ispi = hash_create (0, sizeof (uword));
3999 km->sw_if_indices = hash_create (0, 0);
4000 km->udp_ports = hash_create (0, sizeof (uword));
4002 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4003 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4005 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4006 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4008 ikev2_cli_reference ();
4010 km->log_level = IKEV2_LOG_ERROR;
4011 km->log_class = vlib_log_register_class ("ikev2", 0);
4016 VLIB_INIT_FUNCTION (ikev2_init) =
4018 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4023 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4026 ikev2_main_t *km = &ikev2_main;
4027 ikev2_profile_t *p = 0;
4028 vlib_main_t *vm = km->vlib_main;
4029 f64 now = vlib_time_now (vm);
4032 if (sa->profile_index != ~0)
4033 p = pool_elt_at_index (km->profiles, sa->profile_index);
4035 if (sa->is_initiator && p && csa->time_to_expiration
4036 && now > csa->time_to_expiration)
4038 if (!csa->is_expired || csa->rekey_retries > 0)
4040 ikev2_rekey_child_sa_internal (vm, sa, csa);
4041 csa->time_to_expiration = now + p->handover;
4042 csa->is_expired = 1;
4043 if (csa->rekey_retries == 0)
4045 csa->rekey_retries = 5;
4047 else if (csa->rekey_retries > 0)
4049 csa->rekey_retries--;
4050 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4051 csa->i_proposals->spi, csa->rekey_retries);
4052 if (csa->rekey_retries == 0)
4054 csa->rekey_retries = -1;
4061 csa->time_to_expiration = 0;
4062 ikev2_delete_child_sa_internal (vm, sa, csa);
4069 ipip_tunnel_t *ipip = NULL;
4070 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4071 if (~0 == sw_if_index)
4073 ip46_address_t local_ip;
4074 ip46_address_t remote_ip;
4075 if (sa->is_initiator)
4077 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4078 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4082 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4083 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4087 ipip_tunnel_key_t key = {
4090 .transport = IPIP_TRANSPORT_IP4,
4095 ipip = ipip_tunnel_db_find (&key);
4098 sw_if_index = ipip->sw_if_index;
4104 vec_add1 (sas_in, csa->remote_sa_id);
4105 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4106 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4113 ikev2_set_log_level (ikev2_log_level_t log_level)
4115 ikev2_main_t *km = &ikev2_main;
4117 if (log_level >= IKEV2_LOG_MAX)
4119 ikev2_log_error ("unknown logging level %d", log_level);
4123 km->log_level = log_level;
4128 ikev2_set_liveness_params (u32 period, u32 max_retries)
4130 ikev2_main_t *km = &ikev2_main;
4132 if (period == 0 || max_retries == 0)
4133 return clib_error_return (0, "invalid args");
4135 km->liveness_period = period;
4136 km->liveness_max_retries = max_retries;
4141 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4143 ikev2_main_t *km = &ikev2_main;
4144 vlib_main_t *vm = km->vlib_main;
4145 ikev2_main_per_thread_data_t *tkm;
4146 ikev2_sa_t *fsa = 0;
4147 ikev2_profile_t *p = 0;
4148 ikev2_child_sa_t *fchild = 0;
4149 f64 now = vlib_time_now (vm);
4150 vlib_counter_t counts;
4152 /* Search for the SA and child SA */
4153 vec_foreach (tkm, km->per_thread_data)
4159 pool_foreach (sa, tkm->sas, ({
4160 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4169 vlib_get_combined_counter (&ipsec_sa_counters,
4170 ipsec_sa->stat_index, &counts);
4172 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4173 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4175 if (fchild && p && p->lifetime_maxdata)
4177 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4179 fchild->time_to_expiration = now;
4185 ikev2_process_pending_sa_init (ikev2_main_t * km)
4192 hash_foreach (ispi, sai, km->sa_by_ispi,
4194 sa = pool_elt_at_index (km->sais, sai);
4195 if (sa->init_response_received)
4199 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4202 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4203 clib_memcpy_fast (vlib_buffer_get_current (b),
4204 sa->last_sa_init_req_packet_data,
4205 vec_len (sa->last_sa_init_req_packet_data));
4206 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4207 vec_len (sa->last_sa_init_req_packet_data),
4208 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4213 static vlib_node_registration_t ikev2_mngr_process_node;
4216 ikev2_send_informational_request (ikev2_sa_t * sa)
4218 ikev2_main_t *km = &ikev2_main;
4219 ip4_address_t *src, *dst;
4225 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4228 ikev2_log_error ("buffer alloc failure");
4232 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4233 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4234 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4235 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4236 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4237 len = ikev2_generate_message (sa, ike0, 0, 0);
4239 len = ikev2_insert_non_esp_marker (ike0, len);
4241 if (sa->is_initiator)
4252 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4253 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4257 static_always_inline int
4258 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4260 ikev2_main_t *km = &ikev2_main;
4261 vlib_main_t *vm = km->vlib_main;
4263 if (!sa->sk_ai || !sa->sk_ar)
4266 if (sa->liveness_retries >= km->liveness_max_retries)
4269 f64 now = vlib_time_now (vm);
4271 if (sa->liveness_period_check < now)
4273 sa->liveness_retries++;
4274 sa->liveness_period_check = now + km->liveness_period;
4275 ikev2_send_informational_request (sa);
4281 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4284 ikev2_main_t *km = &ikev2_main;
4285 ipsec_main_t *im = &ipsec_main;
4287 ikev2_child_sa_t *c;
4293 vlib_process_wait_for_event_or_clock (vm, 1);
4294 vlib_process_get_events (vm, NULL);
4296 /* process ike child sas */
4297 ikev2_main_per_thread_data_t *tkm;
4298 vec_foreach (tkm, km->per_thread_data)
4301 u32 *to_be_deleted = 0;
4304 pool_foreach (sa, tkm->sas, ({
4305 ikev2_child_sa_t *c;
4307 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4309 sa->old_remote_id_present = 0;
4313 sa->old_id_expiration -= 1;
4315 vec_foreach (c, sa->childs)
4317 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4320 if (ikev2_mngr_process_responder_sas (sa))
4321 vec_add1 (to_be_deleted, sa - tkm->sas);
4325 vec_foreach (sai, to_be_deleted)
4327 sa = pool_elt_at_index (tkm->sas, sai[0]);
4328 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4329 vec_foreach (c, sa->childs)
4331 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4332 ikev2_sa_del_child_sa (sa, c);
4334 ikev2_sa_free_all_vec (sa);
4335 hash_unset (tkm->sa_by_rspi, sa->rspi);
4336 pool_put (tkm->sas, sa);
4340 p = pool_elt_at_index (km->profiles, sa->profile_index);
4343 ikev2_initiate_sa_init (vm, p->name);
4347 vec_free (to_be_deleted);
4350 /* process ipsec sas */
4353 pool_foreach (sa, im->sad, ({
4354 ikev2_mngr_process_ipsec_sa(sa);
4358 ikev2_process_pending_sa_init (km);
4362 vlib_process_wait_for_event_or_clock (vm, 5);
4363 vlib_process_get_events (vm, NULL);
4372 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4373 .function = ikev2_mngr_process_fn,
4374 .type = VLIB_NODE_TYPE_PROCESS,
4376 "ikev2-manager-process",
4379 VLIB_PLUGIN_REGISTER () = {
4380 .version = VPP_BUILD_VER,
4381 .description = "Internet Key Exchange (IKEv2) Protocol",
4386 * fd.io coding-style-patch-verification: ON
4389 * eval: (c-set-style "gnu")