2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received") \
74 _(BAD_LENGTH, "Bad packet length")
78 #define _(sym,str) IKEV2_ERROR_##sym,
84 static char *ikev2_error_strings[] = {
85 #define _(sym,string) string,
92 IKEV2_NEXT_IP4_LOOKUP,
93 IKEV2_NEXT_ERROR_DROP,
97 typedef u32 ikev2_non_esp_marker;
99 static_always_inline u16
100 ikev2_get_port (ikev2_sa_t * sa)
102 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
105 static_always_inline int
106 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
108 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
109 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
110 return len + sizeof (ikev2_non_esp_marker);
113 static ikev2_sa_transform_t *
114 ikev2_find_transform_data (ikev2_sa_transform_t * t)
116 ikev2_main_t *km = &ikev2_main;
117 ikev2_sa_transform_t *td;
119 vec_foreach (td, km->supported_transforms)
121 if (td->type != t->type)
124 if (td->transform_id != t->transform_id)
127 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
129 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
130 || t->attrs[1] != 14)
133 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
141 static ikev2_sa_proposal_t *
142 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
143 ikev2_protocol_id_t prot_id)
145 ikev2_sa_proposal_t *rv = 0;
146 ikev2_sa_proposal_t *proposal;
147 ikev2_sa_transform_t *transform, *new_t;
148 u8 mandatory_bitmap, optional_bitmap;
150 if (prot_id == IKEV2_PROTOCOL_IKE)
152 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
153 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
154 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
156 else if (prot_id == IKEV2_PROTOCOL_ESP)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_ESN);
160 optional_bitmap = mandatory_bitmap |
161 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
163 else if (prot_id == IKEV2_PROTOCOL_AH)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
166 (1 << IKEV2_TRANSFORM_TYPE_ESN);
167 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
172 vec_add2 (rv, proposal, 1);
174 vec_foreach (proposal, proposals)
177 if (proposal->protocol_id != prot_id)
180 vec_foreach (transform, proposal->transforms)
182 if ((1 << transform->type) & bitmap)
185 if (ikev2_find_transform_data (transform))
187 bitmap |= 1 << transform->type;
188 vec_add2 (rv->transforms, new_t, 1);
189 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
190 new_t->attrs = vec_dup (transform->attrs);
194 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
195 (bitmap & ~optional_bitmap) == 0)
197 rv->proposal_num = proposal->proposal_num;
198 rv->protocol_id = proposal->protocol_id;
199 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
204 vec_free (rv->transforms);
213 ikev2_sa_transform_t *
214 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
215 ikev2_transform_type_t type)
217 ikev2_sa_transform_t *t;
222 vec_foreach (t, p->transforms)
225 return ikev2_find_transform_data (t);
231 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
235 vec_foreach (c, sa->childs)
237 ikev2_sa_proposal_t *proposal =
238 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
239 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
247 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
249 ikev2_sa_proposal_t *p;
250 ikev2_sa_transform_t *t;
257 vec_foreach (t, p->transforms)
261 vec_free (p->transforms);
267 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
269 ikev2_sa_free_proposal_vector (&c->r_proposals);
270 ikev2_sa_free_proposal_vector (&c->i_proposals);
280 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
283 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
289 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
291 ikev2_sa_free_child_sa (child);
292 vec_del1 (sa->childs, child - sa->childs);
296 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
298 vec_free (sa->i_nonce);
299 vec_free (sa->i_dh_data);
300 vec_free (sa->dh_shared_key);
301 vec_free (sa->dh_private_key);
303 ikev2_sa_free_proposal_vector (&sa->r_proposals);
304 ikev2_sa_free_proposal_vector (&sa->i_proposals);
307 vec_free (sa->sk_ai);
308 vec_free (sa->sk_ar);
309 vec_free (sa->sk_ei);
310 vec_free (sa->sk_er);
311 vec_free (sa->sk_pi);
312 vec_free (sa->sk_pr);
314 vec_free (sa->i_id.data);
315 vec_free (sa->i_auth.data);
316 vec_free (sa->r_id.data);
317 vec_free (sa->r_auth.data);
319 EVP_PKEY_free (sa->r_auth.key);
323 ikev2_sa_free_all_child_sa (&sa->childs);
327 ikev2_delete_sa (ikev2_sa_t * sa)
329 ikev2_main_t *km = &ikev2_main;
330 u32 thread_index = vlib_get_thread_index ();
333 ikev2_sa_free_all_vec (sa);
335 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
338 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
339 pool_put (km->per_thread_data[thread_index].sas, sa);
344 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
346 ikev2_sa_transform_t *t = 0, *t2;
347 ikev2_main_t *km = &ikev2_main;
349 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
354 /* check if received DH group is on our list of supported groups */
355 vec_foreach (t2, km->supported_transforms)
357 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
366 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
370 if (sa->is_initiator)
373 RAND_bytes ((u8 *) & sa->ispi, 8);
376 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
377 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
382 RAND_bytes ((u8 *) & sa->rspi, 8);
385 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
386 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
389 /* generate dh keys */
390 ikev2_generate_dh (sa, t);
395 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
397 ikev2_sa_transform_t *t = 0, *t2;
398 ikev2_main_t *km = &ikev2_main;
400 /*move some data to the new SA */
401 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
402 sa->i_nonce = _(sai->i_nonce);
403 sa->i_dh_data = _(sai->i_dh_data);
404 sa->dh_private_key = _(sai->dh_private_key);
405 sa->iaddr.as_u32 = sai->iaddr.as_u32;
406 sa->raddr.as_u32 = sai->raddr.as_u32;
407 sa->is_initiator = sai->is_initiator;
408 sa->i_id.type = sai->i_id.type;
409 sa->r_id.type = sai->r_id.type;
410 sa->profile_index = sai->profile_index;
411 sa->tun_itf = sai->tun_itf;
412 sa->is_tun_itf_set = sai->is_tun_itf_set;
413 sa->i_id.data = _(sai->i_id.data);
414 sa->r_id.data = _(sai->r_id.data);
415 sa->i_auth.method = sai->i_auth.method;
416 sa->i_auth.hex = sai->i_auth.hex;
417 sa->i_auth.data = _(sai->i_auth.data);
418 sa->i_auth.key = _(sai->i_auth.key);
419 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
420 sa->childs = _(sai->childs);
421 sa->udp_encap = sai->udp_encap;
422 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
423 sa->dst_port = sai->dst_port;
424 sa->sw_if_index = sai->sw_if_index;
428 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
433 /* check if received DH group is on our list of supported groups */
434 vec_foreach (t2, km->supported_transforms)
436 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
445 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
450 /* generate dh keys */
451 ikev2_complete_dh (sa, t);
456 ikev2_calc_keys (ikev2_sa_t * sa)
459 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
462 u16 integ_key_len = 0, salt_len = 0;
463 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
465 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
467 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
469 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
472 integ_key_len = tr_integ->key_len;
474 salt_len = sizeof (u32);
476 vec_append (s, sa->i_nonce);
477 vec_append (s, sa->r_nonce);
478 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
480 /* Calculate S = Ni | Nr | SPIi | SPIr */
482 vec_add2 (s, tmp, 2 * sizeof (*spi));
484 spi[0] = clib_host_to_net_u64 (sa->ispi);
485 spi[1] = clib_host_to_net_u64 (sa->rspi);
487 /* calculate PRFplus */
489 int len = tr_prf->key_trunc + /* SK_d */
490 integ_key_len * 2 + /* SK_ai, SK_ar */
491 tr_encr->key_len * 2 + /* SK_ei, SK_er */
492 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
495 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
502 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
503 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
504 pos += tr_prf->key_trunc;
509 sa->sk_ai = vec_new (u8, integ_key_len);
510 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
511 pos += integ_key_len;
514 sa->sk_ar = vec_new (u8, integ_key_len);
515 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
516 pos += integ_key_len;
520 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
521 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
522 pos += tr_encr->key_len + salt_len;
525 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
526 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
527 pos += tr_encr->key_len + salt_len;
530 sa->sk_pi = vec_new (u8, tr_prf->key_len);
531 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
532 pos += tr_prf->key_len;
535 sa->sk_pr = vec_new (u8, tr_prf->key_len);
536 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
537 pos += tr_prf->key_len;
543 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
546 u16 integ_key_len = 0;
549 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
551 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
553 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
555 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
558 integ_key_len = ctr_integ->key_len;
560 salt_len = sizeof (u32);
562 vec_append (s, sa->i_nonce);
563 vec_append (s, sa->r_nonce);
564 /* calculate PRFplus */
566 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
568 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
573 child->sk_ei = vec_new (u8, ctr_encr->key_len);
574 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
575 pos += ctr_encr->key_len;
580 child->sk_ai = vec_new (u8, ctr_integ->key_len);
581 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
582 pos += ctr_integ->key_len;
586 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
591 child->sk_er = vec_new (u8, ctr_encr->key_len);
592 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
593 pos += ctr_encr->key_len;
598 child->sk_ar = vec_new (u8, integ_key_len);
599 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
600 pos += integ_key_len;
604 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
613 static_always_inline u8 *
614 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
616 /* ispi, rspi, ip, port */
617 u8 buf[8 + 8 + 4 + 2];
618 u8 *res = vec_new (u8, 20);
620 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
621 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
622 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
623 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
624 SHA1 (buf, sizeof (buf), res);
629 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
630 ike_header_t * ike, udp_header_t * udp, u32 len)
633 u8 payload = ike->nextpayload;
635 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
637 clib_net_to_host_u64 (ike->ispi),
638 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
640 sa->ispi = clib_net_to_host_u64 (ike->ispi);
642 /* store whole IKE payload - needed for PSK auth */
643 vec_free (sa->last_sa_init_req_packet_data);
644 vec_add (sa->last_sa_init_req_packet_data, ike, len);
646 while (p < len && payload != IKEV2_PAYLOAD_NONE)
648 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
649 u32 plen = clib_net_to_host_u16 (ikep->length);
651 if (plen < sizeof (ike_payload_header_t))
654 if (payload == IKEV2_PAYLOAD_SA)
656 ikev2_sa_free_proposal_vector (&sa->i_proposals);
657 sa->i_proposals = ikev2_parse_sa_payload (ikep);
659 else if (payload == IKEV2_PAYLOAD_KE)
661 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
662 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
663 vec_free (sa->i_dh_data);
664 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
666 else if (payload == IKEV2_PAYLOAD_NONCE)
668 vec_free (sa->i_nonce);
669 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
671 else if (payload == IKEV2_PAYLOAD_NOTIFY)
673 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
674 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
677 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
678 clib_net_to_host_u32 (sa->
681 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
684 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
685 " behind NAT", sa->ispi);
689 else if (n->msg_type ==
690 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
693 ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0,
694 clib_net_to_host_u32 (sa->
697 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
700 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
701 " (self) behind NAT", sa->ispi);
707 else if (payload == IKEV2_PAYLOAD_VENDOR)
709 ikev2_parse_vendor_payload (ikep);
713 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
715 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
717 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
718 sa->unsupported_cp = payload;
723 payload = ikep->nextpayload;
727 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
731 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
732 ike_header_t * ike, udp_header_t * udp, u32 len)
735 u8 payload = ike->nextpayload;
737 sa->ispi = clib_net_to_host_u64 (ike->ispi);
738 sa->rspi = clib_net_to_host_u64 (ike->rspi);
740 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
741 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
744 /* store whole IKE payload - needed for PSK auth */
745 vec_free (sa->last_sa_init_res_packet_data);
746 vec_add (sa->last_sa_init_res_packet_data, ike, len);
748 while (p < len && payload != IKEV2_PAYLOAD_NONE)
750 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
751 u32 plen = clib_net_to_host_u16 (ikep->length);
753 if (plen < sizeof (ike_payload_header_t))
756 if (payload == IKEV2_PAYLOAD_SA)
758 ikev2_sa_free_proposal_vector (&sa->r_proposals);
759 sa->r_proposals = ikev2_parse_sa_payload (ikep);
762 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
764 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
767 else if (payload == IKEV2_PAYLOAD_KE)
769 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
770 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
771 vec_free (sa->r_dh_data);
772 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
774 else if (payload == IKEV2_PAYLOAD_NONCE)
776 vec_free (sa->r_nonce);
777 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
779 else if (payload == IKEV2_PAYLOAD_NOTIFY)
781 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
782 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
784 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
789 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
791 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
792 " behind NAT, unsupported", sa->ispi);
796 else if (n->msg_type ==
797 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
799 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
803 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
806 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
807 " (self) behind NAT", sa->ispi);
813 else if (payload == IKEV2_PAYLOAD_VENDOR)
815 ikev2_parse_vendor_payload (ikep);
819 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
821 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
823 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
824 sa->unsupported_cp = payload;
829 payload = ikep->nextpayload;
835 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload,
838 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
840 u8 last_payload = 0, *plaintext = 0;
842 ike_payload_header_t *ikep = 0;
844 ikev2_sa_transform_t *tr_integ;
845 ikev2_sa_transform_t *tr_encr;
847 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
849 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
850 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
852 if ((!sa->sk_ar || !sa->sk_ai) && !is_aead)
856 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
858 ikep = (ike_payload_header_t *) & ike->payload[p];
859 plen = clib_net_to_host_u16 (ikep->length);
861 if (plen < sizeof (*ikep))
864 if (*payload == IKEV2_PAYLOAD_SK)
866 last_payload = *payload;
870 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
872 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
874 sa->unsupported_cp = *payload;
879 *payload = ikep->nextpayload;
883 if (last_payload != IKEV2_PAYLOAD_SK)
885 ikev2_elog_error ("Last payload must be SK");
891 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
894 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
895 u8 *aad = (u8 *) ike;
896 u32 aad_len = ikep->payload - aad;
897 u8 *tag = ikep->payload + plen;
899 plaintext = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
900 plen, aad, aad_len, tag);
904 if (len < tr_integ->key_trunc)
908 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
909 (u8 *) ike, len - tr_integ->key_trunc);
911 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
914 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
916 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
918 ikev2_elog_error ("message integrity check failed");
924 plaintext = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen);
930 static_always_inline int
931 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
933 if (i1->type != i2->type)
936 if (vec_len (i1->data) != vec_len (i2->data))
939 if (memcmp (i1->data, i2->data, vec_len (i1->data)))
946 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
948 ikev2_main_t *km = &ikev2_main;
952 u32 thread_index = vlib_get_thread_index ();
954 if (!sa->initial_contact)
957 /* find old IKE SAs with the same authenticated identity */
959 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
960 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
961 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
964 if (sa->rspi != tmp->rspi)
965 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
969 for (i = 0; i < vec_len (delete); i++)
972 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
974 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
976 ikev2_delete_sa (tmp);
980 sa->initial_contact = 0;
984 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike,
987 ikev2_child_sa_t *first_child_sa;
989 u8 payload = ike->nextpayload;
991 ike_payload_header_t *ikep;
994 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
995 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
996 clib_host_to_net_u64 (ike->rspi),
997 sa->is_initiator ? sa->raddr.as_u32 : sa->
1000 ikev2_calc_keys (sa);
1002 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1006 if (sa->unsupported_cp)
1007 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1008 goto cleanup_and_exit;
1011 /* select or create 1st child SA */
1012 if (sa->is_initiator)
1014 first_child_sa = &sa->childs[0];
1018 ikev2_sa_free_all_child_sa (&sa->childs);
1019 vec_add2 (sa->childs, first_child_sa, 1);
1023 /* process encrypted payload */
1025 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1027 ikep = (ike_payload_header_t *) & plaintext[p];
1028 plen = clib_net_to_host_u16 (ikep->length);
1030 if (plen < sizeof (ike_payload_header_t))
1031 goto cleanup_and_exit;
1033 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1035 if (sa->is_initiator)
1037 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1038 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
1042 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1043 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1046 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1048 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1050 sa->i_id.type = id->id_type;
1051 vec_free (sa->i_id.data);
1052 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1054 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1056 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1058 sa->r_id.type = id->id_type;
1059 vec_free (sa->r_id.data);
1060 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1062 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1064 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1066 if (sa->is_initiator)
1068 sa->r_auth.method = a->auth_method;
1069 vec_free (sa->r_auth.data);
1070 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1074 sa->i_auth.method = a->auth_method;
1075 vec_free (sa->i_auth.data);
1076 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1079 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1081 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1082 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1084 sa->initial_contact = 1;
1088 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1090 ikev2_parse_vendor_payload (ikep);
1092 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1094 vec_free (first_child_sa->tsi);
1095 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1097 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1099 vec_free (first_child_sa->tsr);
1100 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1104 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1107 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1109 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1110 sa->unsupported_cp = payload;
1115 payload = ikep->nextpayload;
1120 vec_free (plaintext);
1124 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1125 ike_header_t * ike, u32 len)
1128 u8 payload = ike->nextpayload;
1130 ike_payload_header_t *ikep;
1133 sa->liveness_retries = 0;
1134 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1135 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1136 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1138 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1141 goto cleanup_and_exit;
1143 /* process encrypted payload */
1145 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1147 ikep = (ike_payload_header_t *) & plaintext[p];
1148 plen = clib_net_to_host_u16 (ikep->length);
1150 if (plen < sizeof (ike_payload_header_t))
1151 goto cleanup_and_exit;
1153 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1155 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1156 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1157 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1160 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1162 sa->del = ikev2_parse_delete_payload (ikep);
1164 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1166 ikev2_parse_vendor_payload (ikep);
1170 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1172 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1174 sa->unsupported_cp = payload;
1179 payload = ikep->nextpayload;
1184 vec_free (plaintext);
1188 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1189 ike_header_t * ike, u32 len)
1192 u8 payload = ike->nextpayload;
1195 u8 nonce[IKEV2_NONCE_SIZE];
1197 ike_payload_header_t *ikep;
1199 ikev2_notify_t *n = 0;
1200 ikev2_ts_t *tsi = 0;
1201 ikev2_ts_t *tsr = 0;
1202 ikev2_sa_proposal_t *proposal = 0;
1203 ikev2_child_sa_t *child_sa;
1205 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1206 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1207 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1209 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1212 goto cleanup_and_exit;
1214 /* process encrypted payload */
1216 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1218 ikep = (ike_payload_header_t *) & plaintext[p];
1219 plen = clib_net_to_host_u16 (ikep->length);
1221 if (plen < sizeof (ike_payload_header_t))
1222 goto cleanup_and_exit;
1224 else if (payload == IKEV2_PAYLOAD_SA)
1226 proposal = ikev2_parse_sa_payload (ikep);
1228 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1230 n = ikev2_parse_notify_payload (ikep);
1231 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1236 else if (payload == IKEV2_PAYLOAD_DELETE)
1238 sa->del = ikev2_parse_delete_payload (ikep);
1240 else if (payload == IKEV2_PAYLOAD_VENDOR)
1242 ikev2_parse_vendor_payload (ikep);
1244 else if (payload == IKEV2_PAYLOAD_NONCE)
1246 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1248 else if (payload == IKEV2_PAYLOAD_TSI)
1250 tsi = ikev2_parse_ts_payload (ikep);
1252 else if (payload == IKEV2_PAYLOAD_TSR)
1254 tsr = ikev2_parse_ts_payload (ikep);
1258 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1260 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1262 sa->unsupported_cp = payload;
1263 goto cleanup_and_exit;
1267 payload = ikep->nextpayload;
1271 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1273 ikev2_rekey_t *rekey = &sa->rekey[0];
1274 rekey->protocol_id = proposal->protocol_id;
1276 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1277 rekey->i_proposal->spi = rekey->spi;
1278 rekey->r_proposal = proposal;
1282 vec_free (sa->r_nonce);
1283 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1284 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1287 child_sa->rekey_retries = 0;
1292 ikev2_rekey_t *rekey;
1293 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1296 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1298 goto cleanup_and_exit;
1300 vec_add2 (sa->rekey, rekey, 1);
1301 rekey->protocol_id = n->protocol_id;
1302 rekey->spi = n->spi;
1303 rekey->i_proposal = proposal;
1305 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1309 vec_free (sa->i_nonce);
1310 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1311 /* generate new Nr */
1312 vec_free (sa->r_nonce);
1313 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1314 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1318 vec_free (plaintext);
1323 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1331 ikev2_sa_transform_t *tr_prf;
1334 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1340 nonce = sa->i_nonce;
1341 packet_data = sa->last_sa_init_res_packet_data;
1347 nonce = sa->r_nonce;
1348 packet_data = sa->last_sa_init_req_packet_data;
1351 data = vec_new (u8, 4);
1353 vec_append (data, id->data);
1355 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1356 vec_append (authmsg, packet_data);
1357 vec_append (authmsg, nonce);
1358 vec_append (authmsg, id_hash);
1366 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1368 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1369 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1370 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1371 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1378 ikev2_sa_match_ts (ikev2_sa_t * sa)
1380 ikev2_main_t *km = &ikev2_main;
1382 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1383 ikev2_id_t *id_rem, *id_loc;
1386 pool_foreach (p, km->profiles, ({
1388 if (sa->is_initiator)
1404 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1405 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1408 sa->profile_index = p - km->profiles;
1410 vec_foreach(ts, sa->childs[0].tsi)
1412 if (ikev2_ts_cmp(p_tsi, ts))
1414 vec_add1 (tsi, ts[0]);
1419 vec_foreach(ts, sa->childs[0].tsr)
1421 if (ikev2_ts_cmp(p_tsr, ts))
1423 vec_add1 (tsr, ts[0]);
1434 vec_free (sa->childs[0].tsi);
1435 vec_free (sa->childs[0].tsr);
1436 sa->childs[0].tsi = tsi;
1437 sa->childs[0].tsr = tsr;
1443 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1448 ikev2_sa_auth (ikev2_sa_t * sa)
1450 ikev2_main_t *km = &ikev2_main;
1451 ikev2_profile_t *p, *sel_p = 0;
1452 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1453 ikev2_sa_transform_t *tr_prf;
1456 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1458 /* only shared key and rsa signature */
1459 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1460 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1462 ikev2_elog_uint (IKEV2_LOG_ERROR,
1463 "unsupported authentication method %u",
1465 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1469 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1470 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1472 ikev2_id_t *id_rem, *id_loc;
1473 ikev2_auth_t *sa_auth;
1475 if (sa->is_initiator)
1479 sa_auth = &sa->r_auth;
1485 sa_auth = &sa->i_auth;
1489 pool_foreach (p, km->profiles, ({
1492 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1493 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1496 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1498 if (!p->auth.data ||
1499 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1502 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1503 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1505 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1507 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1514 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1516 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1519 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1521 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1534 sa->udp_encap = sel_p->udp_encap;
1535 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1539 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1541 if (!sa->is_initiator)
1543 vec_free (sa->r_id.data);
1544 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1545 sa->r_id.type = sel_p->loc_id.type;
1546 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1547 sa->i_id.type = sel_p->rem_id.type;
1549 /* generate our auth data */
1550 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1551 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1553 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1554 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1556 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1558 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1559 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1563 /* select transforms for 1st child sa */
1564 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1565 sa->childs[0].r_proposals =
1566 ikev2_select_proposal (sa->childs[0].i_proposals,
1567 IKEV2_PROTOCOL_ESP);
1569 if (~0 != sel_p->tun_itf)
1571 sa->is_tun_itf_set = 1;
1572 sa->tun_itf = sel_p->tun_itf;
1578 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1579 "profile found! ispi %lx", sa->ispi);
1580 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1588 ikev2_sa_auth_init (ikev2_sa_t * sa)
1590 ikev2_main_t *km = &ikev2_main;
1591 u8 *authmsg, *key_pad, *psk = 0;
1592 ikev2_sa_transform_t *tr_prf;
1595 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1597 /* only shared key and rsa signature */
1598 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1599 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1601 ikev2_elog_uint (IKEV2_LOG_ERROR,
1602 "unsupported authentication method %u",
1604 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1608 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1609 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1610 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1612 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1614 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1615 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1617 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1619 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1620 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1629 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1631 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1635 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1637 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1647 ipsec_sa_flags_t flags;
1650 ipsec_crypto_alg_t encr_type;
1651 ipsec_integ_alg_t integ_type;
1652 ip46_address_t local_ip;
1653 ip46_address_t remote_ip;
1654 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1656 u32 old_remote_sa_id;
1657 u16 ipsec_over_udp_port;
1660 } ikev2_add_ipsec_tunnel_args_t;
1663 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1665 ikev2_main_t *km = &ikev2_main;
1669 if (~0 == a->sw_if_index)
1671 /* no tunnel associated with the SA/profile - create a new one */
1672 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1673 &a->local_ip, &a->remote_ip, 0,
1674 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1675 TUNNEL_MODE_P2P, &sw_if_index);
1677 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1679 if (hash_get (km->sw_if_indices, sw_if_index))
1680 /* interface is managed by IKE; proceed with updating SAs */
1683 hash_set1 (km->sw_if_indices, sw_if_index);
1687 sw_if_index = a->sw_if_index;
1688 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1693 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1694 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1695 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1700 vec_add1 (sas_in, a->remote_sa_id);
1703 ipsec_tun_protect_del (sw_if_index, NULL);
1705 /* replace local SA immediately */
1706 ipsec_sa_unlock_id (a->local_sa_id);
1708 /* keep the old sa */
1709 vec_add1 (sas_in, a->old_remote_sa_id);
1712 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1714 IPSEC_PROTOCOL_ESP, a->encr_type,
1715 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1716 a->flags, 0, a->salt_local, &a->local_ip,
1717 &a->remote_ip, NULL, a->src_port, a->dst_port);
1718 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1719 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1720 a->integ_type, &a->rem_ikey,
1721 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1722 a->salt_remote, &a->remote_ip,
1723 &a->local_ip, NULL, a->ipsec_over_udp_port,
1724 a->ipsec_over_udp_port);
1726 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1730 ikev2_create_tunnel_interface (vlib_main_t * vm,
1733 ikev2_child_sa_t * child, u32 sa_index,
1734 u32 child_index, u8 is_rekey)
1736 ikev2_main_t *km = &ikev2_main;
1737 ipsec_crypto_alg_t encr_type;
1738 ipsec_integ_alg_t integ_type;
1739 ikev2_profile_t *p = 0;
1740 ikev2_sa_transform_t *tr;
1741 ikev2_sa_proposal_t *proposals;
1743 ikev2_add_ipsec_tunnel_args_t a;
1745 clib_memset (&a, 0, sizeof (a));
1747 if (!child->r_proposals)
1749 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1753 if (sa->is_initiator)
1755 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1756 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1757 proposals = child->r_proposals;
1758 a.local_spi = child->r_proposals[0].spi;
1759 a.remote_spi = child->i_proposals[0].spi;
1763 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1764 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1765 proposals = child->i_proposals;
1766 a.local_spi = child->i_proposals[0].spi;
1767 a.remote_spi = child->r_proposals[0].spi;
1770 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1773 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1774 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1777 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1778 a.is_rekey = is_rekey;
1780 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1781 if (tr && tr->esn_type)
1782 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1784 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1787 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1789 switch (tr->key_len)
1792 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1795 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1798 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1801 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1806 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1809 switch (tr->key_len)
1812 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1815 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1818 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1821 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1829 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1835 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1838 a.encr_type = encr_type;
1842 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1845 switch (tr->integ_type)
1847 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1848 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1850 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1851 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1853 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1854 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1856 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1857 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1860 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1866 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1872 integ_type = IPSEC_INTEG_ALG_NONE;
1875 a.integ_type = integ_type;
1876 ikev2_calc_child_keys (sa, child);
1878 if (sa->is_initiator)
1880 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1881 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1882 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1883 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1886 a.salt_remote = child->salt_er;
1887 a.salt_local = child->salt_ei;
1889 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1893 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1894 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1895 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1896 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1899 a.salt_remote = child->salt_ei;
1900 a.salt_local = child->salt_er;
1902 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1903 a.src_port = sa->ipsec_over_udp_port;
1906 if (sa->is_initiator && sa->profile_index != ~0)
1907 p = pool_elt_at_index (km->profiles, sa->profile_index);
1909 if (p && p->lifetime)
1911 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1912 if (p->lifetime_jitter)
1914 // This is not much better than rand(3), which Coverity warns
1915 // is unsuitable for security applications; random_u32 is
1916 // however fast. If this perturbance to the expiration time
1917 // needs to use a better RNG then we may need to use something
1918 // like /dev/urandom which has significant overhead.
1919 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1920 rnd = random_u32 (&rnd);
1922 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1926 if (thread_index & 0xffffffc0)
1927 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1929 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1930 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1932 child->local_sa_id =
1934 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1936 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1941 /* create a new remote SA ID to keep the old SA for a bit longer
1942 * so the peer has some time to swap their SAs */
1944 /* use most significat bit of child index part in id */
1946 if (sa->current_remote_id_mask)
1948 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1949 sa->current_remote_id_mask = 0;
1953 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1954 sa->current_remote_id_mask = mask;
1955 remote_sa_id |= mask;
1957 sa->old_id_expiration = 3.0;
1958 sa->old_remote_id_present = 1;
1961 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1963 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1964 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1966 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1967 (u8 *) & a, sizeof (a));
1973 ip46_address_t local_ip;
1974 ip46_address_t remote_ip;
1978 } ikev2_del_ipsec_tunnel_args_t;
1980 static_always_inline u32
1981 ikev2_flip_alternate_sa_bit (u32 id)
1990 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1992 ikev2_main_t *km = &ikev2_main;
1993 ipip_tunnel_t *ipip = NULL;
1996 if (~0 == a->sw_if_index)
1999 ipip_tunnel_key_t key = {
2001 .dst = a->remote_ip,
2002 .transport = IPIP_TRANSPORT_IP4,
2007 ipip = ipip_tunnel_db_find (&key);
2011 sw_if_index = ipip->sw_if_index;
2012 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2019 sw_if_index = a->sw_if_index;
2020 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2023 if (~0 != sw_if_index)
2024 ipsec_tun_protect_del (sw_if_index, NULL);
2026 ipsec_sa_unlock_id (a->remote_sa_id);
2027 ipsec_sa_unlock_id (a->local_sa_id);
2028 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2031 ipip_del_tunnel (ipip->sw_if_index);
2035 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2036 ikev2_child_sa_t * child)
2038 ikev2_del_ipsec_tunnel_args_t a;
2040 clib_memset (&a, 0, sizeof (a));
2042 if (sa->is_initiator)
2044 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2045 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2049 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2050 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2053 a.remote_sa_id = child->remote_sa_id;
2054 a.local_sa_id = child->local_sa_id;
2055 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2057 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2063 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2067 ike_payload_header_t *ph;
2071 ikev2_sa_transform_t *tr_encr, *tr_integ;
2073 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2075 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2077 ikev2_payload_chain_t *chain = 0;
2078 ikev2_payload_new_chain (chain);
2080 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2082 if (sa->r_proposals == 0)
2084 ikev2_payload_add_notify (chain,
2085 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2086 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2088 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2090 u8 *data = vec_new (u8, 2);
2091 ikev2_sa_transform_t *tr_dh;
2093 ikev2_sa_get_td_for_type (sa->r_proposals,
2094 IKEV2_TRANSFORM_TYPE_DH);
2095 ASSERT (tr_dh && tr_dh->dh_type);
2097 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2098 data[1] = (tr_dh->dh_type) & 0xff;
2100 ikev2_payload_add_notify (chain,
2101 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2104 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2106 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2108 u8 *data = vec_new (u8, 1);
2110 data[0] = sa->unsupported_cp;
2111 ikev2_payload_add_notify (chain,
2112 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2120 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2121 ikev2_payload_add_sa (chain, sa->r_proposals);
2122 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2123 ikev2_payload_add_nonce (chain, sa->r_nonce);
2125 u8 *nat_detection_sha1 =
2126 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2127 clib_host_to_net_u64 (sa->rspi),
2128 clib_host_to_net_u32 (sa->raddr.as_u32),
2130 ikev2_payload_add_notify (chain,
2131 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2132 nat_detection_sha1);
2133 vec_free (nat_detection_sha1);
2134 nat_detection_sha1 =
2135 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2136 clib_host_to_net_u64 (sa->rspi),
2137 sa->iaddr.as_u32, udp->src_port);
2138 ikev2_payload_add_notify (chain,
2139 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2140 nat_detection_sha1);
2141 vec_free (nat_detection_sha1);
2144 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2146 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2148 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2149 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2150 ikev2_payload_add_auth (chain, &sa->r_auth);
2151 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2152 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2153 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2155 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2157 ikev2_payload_add_notify (chain,
2158 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2160 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2162 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2164 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2166 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2167 ikev2_payload_add_auth (chain, &sa->r_auth);
2169 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2171 ikev2_payload_add_notify (chain,
2172 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2173 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2174 ikev2_payload_add_auth (chain, &sa->r_auth);
2175 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2176 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2178 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2180 u8 *data = vec_new (u8, 1);
2182 data[0] = sa->unsupported_cp;
2183 ikev2_payload_add_notify (chain,
2184 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2188 else if (sa->state == IKEV2_STATE_SA_INIT)
2190 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2191 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2192 ikev2_payload_add_auth (chain, &sa->i_auth);
2193 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2194 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2195 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2196 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2201 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2205 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2207 /* if pending delete */
2210 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2212 if (sa->is_initiator)
2213 ikev2_payload_add_delete (chain, sa->del);
2215 /* The response to a request that deletes the IKE SA is an empty
2216 INFORMATIONAL response. */
2217 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2219 /* The response to a request that deletes ESP or AH SAs will contain
2220 delete payloads for the paired SAs going in the other direction. */
2223 ikev2_payload_add_delete (chain, sa->del);
2228 /* received N(AUTHENTICATION_FAILED) */
2229 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2231 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2234 /* received unsupported critical payload */
2235 else if (sa->unsupported_cp)
2237 u8 *data = vec_new (u8, 1);
2239 data[0] = sa->unsupported_cp;
2240 ikev2_payload_add_notify (chain,
2241 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2244 sa->unsupported_cp = 0;
2246 /* else send empty response */
2248 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2250 if (sa->is_initiator)
2253 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2254 ikev2_notify_t notify;
2255 u8 *data = vec_new (u8, 4);
2256 clib_memset (¬ify, 0, sizeof (notify));
2257 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2258 notify.spi = sa->childs[0].i_proposals->spi;
2259 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2261 ikev2_payload_add_sa (chain, proposals);
2262 ikev2_payload_add_nonce (chain, sa->i_nonce);
2263 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2264 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2265 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2272 if (vec_len (sa->rekey) > 0)
2274 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2275 ikev2_payload_add_nonce (chain, sa->r_nonce);
2276 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2278 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2280 vec_del1 (sa->rekey, 0);
2282 else if (sa->unsupported_cp)
2284 u8 *data = vec_new (u8, 1);
2286 data[0] = sa->unsupported_cp;
2287 ikev2_payload_add_notify (chain,
2288 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2291 sa->unsupported_cp = 0;
2295 ikev2_payload_add_notify (chain,
2296 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2303 ike->version = IKE_VERSION_2;
2304 ike->nextpayload = IKEV2_PAYLOAD_SK;
2305 tlen = sizeof (*ike);
2306 if (sa->is_initiator)
2308 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2309 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2313 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2317 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2319 tlen += vec_len (chain->data);
2320 ike->nextpayload = chain->first_payload_type;
2321 ike->length = clib_host_to_net_u32 (tlen);
2322 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2324 /* store whole IKE payload - needed for PSK auth */
2325 vec_free (sa->last_sa_init_res_packet_data);
2326 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2330 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2331 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2334 plen = sizeof (*ph);
2335 ph = (ike_payload_header_t *) & ike->payload[0];
2336 ph->nextpayload = chain->first_payload_type;
2339 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2340 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2341 plen += vec_len (chain->data) + iv_len;
2343 /* add space for hmac/tag */
2345 plen += tr_integ->key_trunc;
2347 plen += IKEV2_GCM_ICV_SIZE;
2350 /* payload and total length */
2351 ph->length = clib_host_to_net_u16 (plen);
2352 ike->length = clib_host_to_net_u32 (tlen);
2356 ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2357 ph->payload, (u8 *) ike,
2358 sizeof (*ike) + sizeof (*ph),
2359 ph->payload + plen - sizeof (*ph) -
2360 IKEV2_GCM_ICV_SIZE);
2364 ikev2_encrypt_data (ptd, sa, tr_encr, chain->data, ph->payload);
2366 ikev2_calc_integr (tr_integ,
2367 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2368 (u8 *) ike, tlen - tr_integ->key_trunc);
2369 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2370 sizeof (*ike), integ, tr_integ->key_trunc);
2373 /* store whole IKE payload - needed for retransmit */
2374 vec_free (sa->last_res_packet_data);
2375 vec_add (sa->last_res_packet_data, ike, tlen);
2379 ikev2_payload_destroy_chain (chain);
2385 ikev2_retransmit_sa_init (ike_header_t * ike,
2386 ip4_address_t iaddr, ip4_address_t raddr, u32 rlen)
2388 ikev2_main_t *km = &ikev2_main;
2390 u32 thread_index = vlib_get_thread_index ();
2393 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2394 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2395 sa->iaddr.as_u32 == iaddr.as_u32 &&
2396 sa->raddr.as_u32 == raddr.as_u32)
2399 u8 payload = ike->nextpayload;
2401 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2402 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2403 u32 plen = clib_net_to_host_u16(ikep->length);
2405 if (plen < sizeof(ike_payload_header_t))
2408 if (payload == IKEV2_PAYLOAD_NONCE)
2410 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2412 /* req is retransmit */
2413 if (sa->state == IKEV2_STATE_SA_INIT)
2415 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2416 u32 slen = clib_net_to_host_u32(tmp->length);
2417 ike->ispi = tmp->ispi;
2418 ike->rspi = tmp->rspi;
2419 ike->nextpayload = tmp->nextpayload;
2420 ike->version = tmp->version;
2421 ike->exchange = tmp->exchange;
2422 ike->flags = tmp->flags;
2423 ike->msgid = tmp->msgid;
2424 ike->length = tmp->length;
2425 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2426 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2427 "ispi %lx IKE_SA_INIT retransmit "
2428 "from %d.%d.%d.%d to %d.%d.%d.%d",
2430 raddr.as_u32, iaddr.as_u32);
2433 /* else ignore req */
2436 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2437 "ispi %lx IKE_SA_INIT ignore "
2438 "from %d.%d.%d.%d to %d.%d.%d.%d",
2440 raddr.as_u32, iaddr.as_u32);
2445 payload = ikep->nextpayload;
2452 /* req is not retransmit */
2457 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike, u32 rlen)
2459 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2462 if (msg_id > sa->last_msg_id)
2464 sa->last_msg_id = msg_id;
2468 /* retransmitted req */
2469 if (msg_id == sa->last_msg_id)
2471 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2472 u32 slen = clib_net_to_host_u32 (tmp->length);
2473 ike->ispi = tmp->ispi;
2474 ike->rspi = tmp->rspi;
2475 ike->nextpayload = tmp->nextpayload;
2476 ike->version = tmp->version;
2477 ike->exchange = tmp->exchange;
2478 ike->flags = tmp->flags;
2479 ike->msgid = tmp->msgid;
2480 ike->length = tmp->length;
2481 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2482 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2483 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2487 /* old req ignore */
2488 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2489 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2494 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2496 ikev2_main_t *km = &ikev2_main;
2497 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2498 sa->profile_index = ~0;
2502 ikev2_del_sa_init_from_main (u64 * ispi)
2504 ikev2_main_t *km = &ikev2_main;
2505 uword *p = hash_get (km->sa_by_ispi, *ispi);
2508 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2509 hash_unset (km->sa_by_ispi, sai->ispi);
2510 ikev2_sa_free_all_vec (sai);
2511 pool_put (km->sais, sai);
2516 ikev2_del_sa_init (u64 ispi)
2518 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2523 ikev2_node_fn (vlib_main_t * vm,
2524 vlib_node_runtime_t * node, vlib_frame_t * frame)
2526 u32 n_left_from, *from, *to_next;
2527 ikev2_next_t next_index;
2528 ikev2_main_t *km = &ikev2_main;
2529 u32 thread_index = vlib_get_thread_index ();
2531 from = vlib_frame_vector_args (frame);
2532 n_left_from = frame->n_vectors;
2533 next_index = node->cached_next_index;
2535 while (n_left_from > 0)
2539 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2541 while (n_left_from > 0 && n_left_to_next > 0)
2545 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2550 ikev2_sa_t *sa0 = 0;
2551 ikev2_sa_t sa; /* temporary store for SA */
2553 int is_req = 0, has_non_esp_marker = 0;
2555 /* speculatively enqueue b0 to the current next frame */
2561 n_left_to_next -= 1;
2563 b0 = vlib_get_buffer (vm, bi0);
2565 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2567 u8 *ptr = vlib_buffer_get_current (b0);
2568 ip40 = (ip4_header_t *) ptr;
2569 ptr += sizeof (*ip40);
2570 udp0 = (udp_header_t *) ptr;
2571 ptr += sizeof (*udp0);
2572 ike0 = (ike_header_t *) ptr;
2576 ike0 = vlib_buffer_get_current (b0);
2577 vlib_buffer_advance (b0, -sizeof (*udp0));
2578 udp0 = vlib_buffer_get_current (b0);
2579 vlib_buffer_advance (b0, -sizeof (*ip40));
2580 ip40 = vlib_buffer_get_current (b0);
2583 rlen = b0->current_length - sizeof (*ip40) - sizeof (*udp0);
2585 /* check for non-esp marker */
2586 if (*((u32 *) ike0) == 0)
2589 (ike_header_t *) ((u8 *) ike0 +
2590 sizeof (ikev2_non_esp_marker));
2591 rlen -= sizeof (ikev2_non_esp_marker);
2592 has_non_esp_marker = 1;
2595 if (clib_net_to_host_u32 (ike0->length) != rlen)
2597 vlib_node_increment_counter (vm, ikev2_node.index,
2598 IKEV2_ERROR_BAD_LENGTH, 1);
2602 if (ike0->version != IKE_VERSION_2)
2604 vlib_node_increment_counter (vm, ikev2_node.index,
2605 IKEV2_ERROR_NOT_IKEV2, 1);
2609 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2612 clib_memset (sa0, 0, sizeof (*sa0));
2614 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2616 if (ike0->rspi == 0)
2618 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2619 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2620 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2623 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2627 vlib_node_increment_counter (vm, ikev2_node.index,
2630 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2632 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2637 ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2639 if (sa0->state == IKEV2_STATE_SA_INIT)
2641 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2643 ikev2_select_proposal (sa0->i_proposals,
2644 IKEV2_PROTOCOL_IKE);
2645 ikev2_generate_sa_init_data (sa0);
2648 if (sa0->state == IKEV2_STATE_SA_INIT
2649 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2651 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2654 if (sa0->state == IKEV2_STATE_SA_INIT)
2656 /* add SA to the pool */
2657 pool_get (km->per_thread_data[thread_index].sas,
2659 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2660 ikev2_init_sa (vm, sa0);
2662 per_thread_data[thread_index].sa_by_rspi,
2665 km->per_thread_data[thread_index].sas);
2669 ikev2_sa_free_all_vec (sa0);
2673 else //received sa_init without initiator flag
2675 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2676 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2677 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2679 if (sa0->state == IKEV2_STATE_SA_INIT)
2682 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2683 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2687 pool_elt_at_index (km->sais, p[0]);
2689 if (clib_atomic_bool_cmp_and_swap
2690 (&sai->init_response_received, 0, 1))
2692 ikev2_complete_sa_data (sa0, sai);
2693 ikev2_calc_keys (sa0);
2694 ikev2_sa_auth_init (sa0);
2696 ikev2_generate_message (sa0, ike0, 0, udp0);
2700 /* we've already processed sa-init response */
2701 sa0->state = IKEV2_STATE_UNKNOWN;
2706 if (sa0->state == IKEV2_STATE_SA_INIT)
2708 /* add SA to the pool */
2709 pool_get (km->per_thread_data[thread_index].sas, sa0);
2710 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2711 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2713 sa0 - km->per_thread_data[thread_index].sas);
2717 ikev2_sa_free_all_vec (sa0);
2721 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2724 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2725 clib_net_to_host_u64 (ike0->rspi));
2729 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2732 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2735 vlib_node_increment_counter (vm, ikev2_node.index,
2738 IKEV2_ERROR_IKE_REQ_IGNORE
2740 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2745 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2746 ikev2_process_auth_req (vm, sa0, ike0, rlen);
2747 ikev2_sa_auth (sa0);
2748 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2750 ikev2_initial_contact_cleanup (sa0);
2751 ikev2_sa_match_ts (sa0);
2752 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2753 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2758 if (sa0->is_initiator)
2760 ikev2_del_sa_init (ike0->ispi);
2764 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2768 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2771 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2772 clib_net_to_host_u64 (ike0->rspi));
2776 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2779 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2782 vlib_node_increment_counter (vm, ikev2_node.index,
2785 IKEV2_ERROR_IKE_REQ_IGNORE
2787 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2792 ikev2_process_informational_req (vm, sa0, ike0, rlen);
2795 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2797 ikev2_delete_t *d, *tmp, *resp = 0;
2798 vec_foreach (d, sa0->del)
2800 ikev2_child_sa_t *ch_sa;
2801 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2803 !sa0->is_initiator);
2806 ikev2_delete_tunnel_interface (km->vnet_main,
2808 if (!sa0->is_initiator)
2810 vec_add2 (resp, tmp, 1);
2811 tmp->protocol_id = d->protocol_id;
2812 tmp->spi = ch_sa->r_proposals[0].spi;
2814 ikev2_sa_del_child_sa (sa0, ch_sa);
2817 if (!sa0->is_initiator)
2819 vec_free (sa0->del);
2824 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2826 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2827 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2831 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2834 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2835 clib_net_to_host_u64 (ike0->rspi));
2839 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2842 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2845 vlib_node_increment_counter (vm, ikev2_node.index,
2848 IKEV2_ERROR_IKE_REQ_IGNORE
2850 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2855 ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
2858 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2861 ikev2_sa_free_all_child_sa (&sa0->childs);
2862 ikev2_child_sa_t *child;
2863 vec_add2 (sa0->childs, child, 1);
2864 clib_memset (child, 0, sizeof (*child));
2865 child->r_proposals = sa0->rekey[0].r_proposal;
2866 child->i_proposals = sa0->rekey[0].i_proposal;
2867 child->tsi = sa0->rekey[0].tsi;
2868 child->tsr = sa0->rekey[0].tsr;
2869 ikev2_create_tunnel_interface (vm, thread_index,
2871 child - sa0->childs,
2874 if (sa0->is_initiator)
2876 vec_free (sa0->rekey);
2880 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2887 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2888 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2890 ip40->src_address.as_u32,
2891 ip40->dst_address.as_u32);
2895 /* if we are sending packet back, rewrite headers */
2896 if (slen && ~0 != slen)
2898 next0 = IKEV2_NEXT_IP4_LOOKUP;
2899 if (sa0->is_initiator)
2901 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2902 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2906 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2907 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2912 udp0->dst_port = udp0->src_port =
2913 clib_net_to_host_u16 (ikev2_get_port (sa0));
2915 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2918 if (!has_non_esp_marker)
2919 slen = ikev2_insert_non_esp_marker (ike0, slen);
2924 if (has_non_esp_marker)
2925 slen += sizeof (ikev2_non_esp_marker);
2927 u16 tp = udp0->dst_port;
2928 udp0->dst_port = udp0->src_port;
2929 udp0->src_port = tp;
2933 clib_host_to_net_u16 (slen + sizeof (udp_header_t));
2935 b0->current_length =
2936 slen + sizeof (ip4_header_t) + sizeof (udp_header_t);
2937 ip40->length = clib_host_to_net_u16 (b0->current_length);
2938 ip40->checksum = ip4_header_checksum (ip40);
2941 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2942 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2944 ikev2_child_sa_t *c;
2946 vec_foreach (c, sa0->childs)
2947 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2949 ikev2_delete_sa (sa0);
2951 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2953 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2954 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2956 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2957 t->sw_if_index = sw_if_index0;
2958 t->next_index = next0;
2961 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2962 n_left_to_next, bi0, next0);
2965 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2968 vlib_node_increment_counter (vm, ikev2_node.index,
2969 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2970 return frame->n_vectors;
2974 VLIB_REGISTER_NODE (ikev2_node,static) = {
2975 .function = ikev2_node_fn,
2977 .vector_size = sizeof (u32),
2978 .format_trace = format_ikev2_trace,
2979 .type = VLIB_NODE_TYPE_INTERNAL,
2981 .n_errors = ARRAY_LEN(ikev2_error_strings),
2982 .error_strings = ikev2_error_strings,
2984 .n_next_nodes = IKEV2_N_NEXT,
2987 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2988 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2993 // set ikev2 proposals when vpp is used as initiator
2994 static clib_error_t *
2995 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2996 ikev2_transforms_set * ts,
2997 ikev2_sa_proposal_t ** proposals, int is_ike)
3000 ikev2_main_t *km = &ikev2_main;
3001 ikev2_sa_proposal_t *proposal;
3002 vec_add2 (*proposals, proposal, 1);
3003 ikev2_sa_transform_t *td;
3008 vec_foreach (td, km->supported_transforms)
3010 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3011 && td->encr_type == ts->crypto_alg
3012 && td->key_len == ts->crypto_key_size / 8)
3015 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3016 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3017 vec_add (td->attrs, (u8 *) attr, 4);
3018 vec_add1 (proposal->transforms, *td);
3027 r = clib_error_return (0, "Unsupported algorithm");
3031 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3035 vec_foreach (td, km->supported_transforms)
3037 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3038 && td->integ_type == ts->integ_alg)
3040 vec_add1 (proposal->transforms, *td);
3048 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3049 r = clib_error_return (0, "Unsupported algorithm");
3058 vec_foreach (td, km->supported_transforms)
3060 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3061 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3063 vec_add1 (proposal->transforms, *td);
3070 r = clib_error_return (0, "Unsupported algorithm");
3079 vec_foreach (td, km->supported_transforms)
3081 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3083 vec_add1 (proposal->transforms, *td);
3086 sa->dh_group = td->dh_type;
3094 r = clib_error_return (0, "Unsupported algorithm");
3102 vec_foreach (td, km->supported_transforms)
3104 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3106 vec_add1 (proposal->transforms, *td);
3112 r = clib_error_return (0, "Unsupported algorithm");
3121 static ikev2_profile_t *
3122 ikev2_profile_index_by_name (u8 * name)
3124 ikev2_main_t *km = &ikev2_main;
3127 p = mhash_get (&km->profile_index_by_name, name);
3131 return pool_elt_at_index (km->profiles, p[0]);
3136 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3137 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3145 b0 = vlib_get_buffer (vm, bi0);
3146 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3147 udp0 = vlib_buffer_get_current (b0);
3148 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3149 ip40 = vlib_buffer_get_current (b0);
3152 ip40->ip_version_and_header_length = 0x45;
3154 ip40->fragment_id = 0;
3155 ip40->flags_and_fragment_offset = 0;
3157 ip40->protocol = IP_PROTOCOL_UDP;
3158 ip40->dst_address.as_u32 = dst->as_u32;
3159 ip40->src_address.as_u32 = src->as_u32;
3160 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3161 udp0->src_port = clib_host_to_net_u16 (src_port);
3162 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3164 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3165 ip40->length = clib_host_to_net_u16 (b0->current_length);
3166 ip40->checksum = ip4_header_checksum (ip40);
3168 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3169 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3171 /* send the request */
3172 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3173 to_next = vlib_frame_vector_args (f);
3176 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3181 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3184 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3189 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3190 *ike = vlib_buffer_get_current (b0);
3195 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3197 ikev2_main_t *km = &ikev2_main;
3199 km->pkey = ikev2_load_key_file (file);
3200 if (km->pkey == NULL)
3201 return clib_error_return (0, "load key '%s' failed", file);
3206 static_always_inline vnet_api_error_t
3207 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3209 ikev2_main_t *km = &ikev2_main;
3210 udp_dst_port_info_t *pi;
3212 uword *v = hash_get (km->udp_ports, port);
3213 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3217 /* IKE already uses this port, only increment reference counter */
3224 return VNET_API_ERROR_UDP_PORT_TAKEN;
3226 udp_register_dst_port (km->vlib_main, port,
3227 ipsec4_tun_input_node.index, 1);
3228 hash_set (km->udp_ports, port, 1);
3230 p->ipsec_over_udp_port = port;
3234 static_always_inline void
3235 ikev2_unregister_udp_port (ikev2_profile_t * p)
3237 ikev2_main_t *km = &ikev2_main;
3240 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3243 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3251 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3252 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3255 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3259 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3260 ikev2_main_per_thread_data_t * tkm,
3263 ikev2_main_t *km = &ikev2_main;
3264 ip4_address_t *src, *dst;
3266 /* Create the Initiator notification for IKE SA removal */
3271 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3274 ikev2_log_error ("buffer alloc failure");
3278 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3279 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3280 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3281 vec_resize (sa->del, 1);
3282 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3283 sa->del->spi = sa->ispi;
3284 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3285 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3286 len = ikev2_generate_message (sa, ike0, 0, 0);
3288 if (sa->is_initiator)
3299 ikev2_send_ike (vm, src, dst, bi0, len,
3300 ikev2_get_port (sa), sa->dst_port, 0);
3302 /* delete local SA */
3303 ikev2_child_sa_t *c;
3304 vec_foreach (c, sa->childs)
3305 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3307 u64 rspi = sa->rspi;
3308 ikev2_sa_free_all_vec (sa);
3309 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3312 hash_unset (tkm->sa_by_rspi, rspi);
3313 pool_put (tkm->sas, sa);
3318 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3320 ikev2_main_per_thread_data_t *tkm;
3322 u32 pi = p - km->profiles;
3326 vec_foreach (tkm, km->per_thread_data)
3329 pool_foreach (sa, tkm->sas, ({
3330 if (sa->profile_index != ~0 && pi == sa->profile_index)
3331 vec_add1 (del_sai, sa - tkm->sas);
3335 vec_foreach (sai, del_sai)
3337 sa = pool_elt_at_index (tkm->sas, sai[0]);
3338 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3341 vec_reset_length (del_sai);
3348 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3350 ikev2_main_t *km = &ikev2_main;
3355 if (ikev2_profile_index_by_name (name))
3356 return clib_error_return (0, "policy %v already exists", name);
3358 pool_get (km->profiles, p);
3359 clib_memset (p, 0, sizeof (*p));
3360 p->name = vec_dup (name);
3361 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3362 p->responder.sw_if_index = ~0;
3364 uword index = p - km->profiles;
3365 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3369 p = ikev2_profile_index_by_name (name);
3371 return clib_error_return (0, "policy %v does not exists", name);
3373 ikev2_unregister_udp_port (p);
3374 ikev2_cleanup_profile_sessions (km, p);
3377 pool_put (km->profiles, p);
3378 mhash_unset (&km->profile_index_by_name, name, 0);
3384 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3385 u8 * auth_data, u8 data_hex_format)
3390 p = ikev2_profile_index_by_name (name);
3394 r = clib_error_return (0, "unknown profile %v", name);
3397 vec_free (p->auth.data);
3398 p->auth.method = auth_method;
3399 p->auth.data = vec_dup (auth_data);
3400 p->auth.hex = data_hex_format;
3402 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3404 vec_add1 (p->auth.data, 0);
3406 EVP_PKEY_free (p->auth.key);
3407 p->auth.key = ikev2_load_cert_file (p->auth.data);
3408 if (p->auth.key == NULL)
3409 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3416 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3422 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3423 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3425 r = clib_error_return (0, "unsupported identity type %U",
3426 format_ikev2_id_type, id_type);
3430 p = ikev2_profile_index_by_name (name);
3434 r = clib_error_return (0, "unknown profile %v", name);
3440 vec_free (p->loc_id.data);
3441 p->loc_id.type = id_type;
3442 p->loc_id.data = vec_dup (data);
3446 vec_free (p->rem_id.data);
3447 p->rem_id.type = id_type;
3448 p->rem_id.data = vec_dup (data);
3455 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3456 u16 start_port, u16 end_port, ip4_address_t start_addr,
3457 ip4_address_t end_addr, int is_local)
3462 p = ikev2_profile_index_by_name (name);
3466 r = clib_error_return (0, "unknown profile %v", name);
3472 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3473 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3474 p->loc_ts.start_port = start_port;
3475 p->loc_ts.end_port = end_port;
3476 p->loc_ts.protocol_id = protocol_id;
3477 p->loc_ts.ts_type = 7;
3481 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3482 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3483 p->rem_ts.start_port = start_port;
3484 p->rem_ts.end_port = end_port;
3485 p->rem_ts.protocol_id = protocol_id;
3486 p->rem_ts.ts_type = 7;
3494 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3495 u32 sw_if_index, ip4_address_t ip4)
3500 p = ikev2_profile_index_by_name (name);
3504 r = clib_error_return (0, "unknown profile %v", name);
3508 p->responder.sw_if_index = sw_if_index;
3509 p->responder.ip4 = ip4;
3515 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3516 ikev2_transform_encr_type_t crypto_alg,
3517 ikev2_transform_integ_type_t integ_alg,
3518 ikev2_transform_dh_type_t dh_type,
3519 u32 crypto_key_size)
3524 p = ikev2_profile_index_by_name (name);
3528 r = clib_error_return (0, "unknown profile %v", name);
3532 p->ike_ts.crypto_alg = crypto_alg;
3533 p->ike_ts.integ_alg = integ_alg;
3534 p->ike_ts.dh_type = dh_type;
3535 p->ike_ts.crypto_key_size = crypto_key_size;
3540 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3541 ikev2_transform_encr_type_t crypto_alg,
3542 ikev2_transform_integ_type_t integ_alg,
3543 u32 crypto_key_size)
3548 p = ikev2_profile_index_by_name (name);
3552 r = clib_error_return (0, "unknown profile %v", name);
3556 p->esp_ts.crypto_alg = crypto_alg;
3557 p->esp_ts.integ_alg = integ_alg;
3558 p->esp_ts.crypto_key_size = crypto_key_size;
3563 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3564 u8 * name, u32 sw_if_index)
3569 p = ikev2_profile_index_by_name (name);
3573 r = clib_error_return (0, "unknown profile %v", name);
3577 p->tun_itf = sw_if_index;
3583 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3586 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3587 ikev2_main_t *km = &ikev2_main;
3588 vnet_api_error_t rv = 0;
3592 return VNET_API_ERROR_INVALID_VALUE;
3596 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3597 return VNET_API_ERROR_VALUE_EXIST;
3599 rv = ikev2_register_udp_port (p, port);
3603 v = hash_get (km->udp_ports, port);
3605 return VNET_API_ERROR_IKE_NO_PORT;
3607 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3608 return VNET_API_ERROR_INVALID_VALUE;
3610 ikev2_unregister_udp_port (p);
3616 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3618 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3623 r = clib_error_return (0, "unknown profile %v", name);
3632 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3633 u64 lifetime, u32 jitter, u32 handover,
3639 p = ikev2_profile_index_by_name (name);
3643 r = clib_error_return (0, "unknown profile %v", name);
3647 p->lifetime = lifetime;
3648 p->lifetime_jitter = jitter;
3649 p->handover = handover;
3650 p->lifetime_maxdata = maxdata;
3655 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3659 ip4_main_t *im = &ip4_main;
3660 ikev2_main_t *km = &ikev2_main;
3662 p = ikev2_profile_index_by_name (name);
3666 r = clib_error_return (0, "unknown profile %v", name);
3670 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3672 r = clib_error_return (0, "responder not set for profile %v", name);
3677 /* Create the Initiator Request */
3681 ip_lookup_main_t *lm = &im->lookup_main;
3683 int len = sizeof (ike_header_t);
3685 /* Get own iface IP */
3687 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3688 ip_interface_address_t *if_add =
3689 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3690 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3692 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3695 char *errmsg = "buffer alloc failure";
3696 ikev2_log_error (errmsg);
3697 return clib_error_return (0, errmsg);
3700 /* Prepare the SA and the IKE payload */
3702 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3703 ikev2_payload_chain_t *chain = 0;
3704 ikev2_payload_new_chain (chain);
3706 /* Build the IKE proposal payload */
3707 ikev2_sa_proposal_t *proposals = 0;
3708 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3709 proposals[0].proposal_num = 1;
3710 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3712 /* Add and then cleanup proposal data */
3713 ikev2_payload_add_sa (chain, proposals);
3714 ikev2_sa_free_proposal_vector (&proposals);
3716 sa.is_initiator = 1;
3717 sa.profile_index = p - km->profiles;
3718 sa.state = IKEV2_STATE_SA_INIT;
3719 sa.tun_itf = p->tun_itf;
3720 sa.udp_encap = p->udp_encap;
3721 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3722 sa.is_tun_itf_set = 1;
3723 sa.initial_contact = 1;
3724 sa.dst_port = IKEV2_PORT;
3725 ikev2_generate_sa_init_data (&sa);
3726 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3727 ikev2_payload_add_nonce (chain, sa.i_nonce);
3729 /* Build the child SA proposal */
3730 vec_resize (sa.childs, 1);
3731 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3732 &sa.childs[0].i_proposals, 0);
3733 sa.childs[0].i_proposals[0].proposal_num = 1;
3734 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3735 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3736 sizeof (sa.childs[0].i_proposals[0].spi));
3738 /* Add NAT detection notification messages (mandatory) */
3739 u8 *nat_detection_sha1 =
3740 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3741 clib_host_to_net_u64 (sa.rspi),
3742 clib_host_to_net_u32 (if_ip->as_u32),
3743 clib_host_to_net_u16 (IKEV2_PORT));
3745 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3746 nat_detection_sha1);
3747 vec_free (nat_detection_sha1);
3748 nat_detection_sha1 =
3749 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3750 clib_host_to_net_u64 (sa.rspi),
3751 clib_host_to_net_u32 (p->responder.ip4.as_u32),
3752 clib_host_to_net_u16 (sa.dst_port));
3753 ikev2_payload_add_notify (chain,
3754 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3755 nat_detection_sha1);
3756 vec_free (nat_detection_sha1);
3758 u8 *sig_hash_algo = vec_new (u8, 8);
3759 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3760 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3761 ikev2_payload_add_notify (chain,
3762 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3764 vec_free (sig_hash_algo);
3767 /* Buffer update and boilerplate */
3768 len += vec_len (chain->data);
3769 ike0->nextpayload = chain->first_payload_type;
3770 ike0->length = clib_host_to_net_u32 (len);
3771 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3772 ikev2_payload_destroy_chain (chain);
3774 ike0->version = IKE_VERSION_2;
3775 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3776 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3777 ike0->ispi = sa.ispi;
3781 /* store whole IKE payload - needed for PSK auth */
3782 vec_free (sa.last_sa_init_req_packet_data);
3783 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3785 /* add data to the SA then add it to the pool */
3786 sa.iaddr.as_u32 = if_ip->as_u32;
3787 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3788 sa.i_id.type = p->loc_id.type;
3789 sa.i_id.data = vec_dup (p->loc_id.data);
3790 sa.r_id.type = p->rem_id.type;
3791 sa.r_id.data = vec_dup (p->rem_id.data);
3792 sa.i_auth.method = p->auth.method;
3793 sa.i_auth.hex = p->auth.hex;
3794 sa.i_auth.data = vec_dup (p->auth.data);
3795 sa.sw_if_index = p->responder.sw_if_index;
3796 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3797 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3799 ikev2_initial_contact_cleanup (&sa);
3801 /* add SA to the pool */
3802 ikev2_sa_t *sa0 = 0;
3803 pool_get (km->sais, sa0);
3804 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3805 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3807 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3808 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3810 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3811 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3812 p->responder.ip4.as_u32);
3819 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3820 ikev2_child_sa_t * csa)
3822 /* Create the Initiator notification for child SA removal */
3823 ikev2_main_t *km = &ikev2_main;
3828 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3831 ikev2_log_error ("buffer alloc failure");
3835 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3836 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3837 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3838 vec_resize (sa->del, 1);
3839 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3840 sa->del->spi = csa->i_proposals->spi;
3841 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3842 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3843 len = ikev2_generate_message (sa, ike0, 0, 0);
3845 len = ikev2_insert_non_esp_marker (ike0, len);
3846 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3847 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3849 /* delete local child SA */
3850 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3851 ikev2_sa_del_child_sa (sa, csa);
3855 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3858 ikev2_main_t *km = &ikev2_main;
3859 ikev2_main_per_thread_data_t *tkm;
3860 ikev2_sa_t *fsa = 0;
3861 ikev2_child_sa_t *fchild = 0;
3863 /* Search for the child SA */
3864 vec_foreach (tkm, km->per_thread_data)
3870 pool_foreach (sa, tkm->sas, ({
3871 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3881 if (!fchild || !fsa)
3883 r = clib_error_return (0, "Child SA not found");
3888 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3895 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3898 ikev2_main_t *km = &ikev2_main;
3899 ikev2_main_per_thread_data_t *tkm;
3900 ikev2_sa_t *fsa = 0;
3901 ikev2_main_per_thread_data_t *ftkm = 0;
3903 /* Search for the IKE SA */
3904 vec_foreach (tkm, km->per_thread_data)
3910 pool_foreach (sa, tkm->sas, ({
3911 if (sa->ispi == ispi)
3923 r = clib_error_return (0, "IKE SA not found");
3927 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3932 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3933 ikev2_child_sa_t * csa)
3935 /* Create the Initiator request for create child SA */
3940 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3943 ikev2_log_error ("buffer alloc failure");
3947 ike0->version = IKE_VERSION_2;
3948 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3949 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3950 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3951 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3952 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3953 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3955 ikev2_rekey_t *rekey;
3956 vec_add2 (sa->rekey, rekey, 1);
3957 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3960 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3961 rekey->spi = proposals[0].spi;
3962 rekey->ispi = csa->i_proposals->spi;
3963 len = ikev2_generate_message (sa, ike0, proposals, 0);
3965 len = ikev2_insert_non_esp_marker (ike0, len);
3966 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3967 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3968 vec_free (proposals);
3972 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3975 ikev2_main_t *km = &ikev2_main;
3976 ikev2_main_per_thread_data_t *tkm;
3977 ikev2_sa_t *fsa = 0;
3978 ikev2_child_sa_t *fchild = 0;
3980 /* Search for the child SA */
3981 vec_foreach (tkm, km->per_thread_data)
3987 pool_foreach (sa, tkm->sas, ({
3988 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3998 if (!fchild || !fsa)
4000 r = clib_error_return (0, "Child SA not found");
4005 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4012 ikev2_init (vlib_main_t * vm)
4014 ikev2_main_t *km = &ikev2_main;
4015 vlib_thread_main_t *tm = vlib_get_thread_main ();
4018 clib_memset (km, 0, sizeof (ikev2_main_t));
4019 km->vnet_main = vnet_get_main ();
4022 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4023 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4024 ikev2_crypto_init (km);
4026 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4028 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4029 CLIB_CACHE_LINE_BYTES);
4030 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4032 ikev2_main_per_thread_data_t *ptd =
4033 vec_elt_at_index (km->per_thread_data, thread_id);
4035 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4037 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4038 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4039 ptd->hmac_ctx = HMAC_CTX_new ();
4041 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4042 ptd->evp_ctx = &ptd->_evp_ctx;
4043 HMAC_CTX_init (&(ptd->_hmac_ctx));
4044 ptd->hmac_ctx = &ptd->_hmac_ctx;
4048 km->sa_by_ispi = hash_create (0, sizeof (uword));
4049 km->sw_if_indices = hash_create (0, 0);
4050 km->udp_ports = hash_create (0, sizeof (uword));
4052 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4053 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4055 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4056 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4058 ikev2_cli_reference ();
4060 km->log_level = IKEV2_LOG_ERROR;
4061 km->log_class = vlib_log_register_class ("ikev2", 0);
4066 VLIB_INIT_FUNCTION (ikev2_init) =
4068 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4073 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4076 ikev2_main_t *km = &ikev2_main;
4077 ikev2_profile_t *p = 0;
4078 vlib_main_t *vm = km->vlib_main;
4079 f64 now = vlib_time_now (vm);
4082 if (sa->profile_index != ~0)
4083 p = pool_elt_at_index (km->profiles, sa->profile_index);
4085 if (sa->is_initiator && p && csa->time_to_expiration
4086 && now > csa->time_to_expiration)
4088 if (!csa->is_expired || csa->rekey_retries > 0)
4090 ikev2_rekey_child_sa_internal (vm, sa, csa);
4091 csa->time_to_expiration = now + p->handover;
4092 csa->is_expired = 1;
4093 if (csa->rekey_retries == 0)
4095 csa->rekey_retries = 5;
4097 else if (csa->rekey_retries > 0)
4099 csa->rekey_retries--;
4100 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4101 csa->i_proposals->spi, csa->rekey_retries);
4102 if (csa->rekey_retries == 0)
4104 csa->rekey_retries = -1;
4111 csa->time_to_expiration = 0;
4112 ikev2_delete_child_sa_internal (vm, sa, csa);
4120 ipip_tunnel_t *ipip = NULL;
4121 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4122 if (~0 == sw_if_index)
4124 ip46_address_t local_ip;
4125 ip46_address_t remote_ip;
4126 if (sa->is_initiator)
4128 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4129 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4133 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4134 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4138 ipip_tunnel_key_t key = {
4141 .transport = IPIP_TRANSPORT_IP4,
4146 ipip = ipip_tunnel_db_find (&key);
4149 sw_if_index = ipip->sw_if_index;
4155 vec_add1 (sas_in, csa->remote_sa_id);
4156 vlib_worker_thread_barrier_sync (vm);
4157 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4158 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4159 vlib_worker_thread_barrier_release (vm);
4166 ikev2_set_log_level (ikev2_log_level_t log_level)
4168 ikev2_main_t *km = &ikev2_main;
4170 if (log_level >= IKEV2_LOG_MAX)
4172 ikev2_log_error ("unknown logging level %d", log_level);
4176 km->log_level = log_level;
4181 ikev2_set_liveness_params (u32 period, u32 max_retries)
4183 ikev2_main_t *km = &ikev2_main;
4185 if (period == 0 || max_retries == 0)
4186 return clib_error_return (0, "invalid args");
4188 km->liveness_period = period;
4189 km->liveness_max_retries = max_retries;
4194 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4196 ikev2_main_t *km = &ikev2_main;
4197 vlib_main_t *vm = km->vlib_main;
4198 ikev2_main_per_thread_data_t *tkm;
4199 ikev2_sa_t *fsa = 0;
4200 ikev2_profile_t *p = 0;
4201 ikev2_child_sa_t *fchild = 0;
4202 f64 now = vlib_time_now (vm);
4203 vlib_counter_t counts;
4205 /* Search for the SA and child SA */
4206 vec_foreach (tkm, km->per_thread_data)
4212 pool_foreach (sa, tkm->sas, ({
4213 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4222 vlib_get_combined_counter (&ipsec_sa_counters,
4223 ipsec_sa->stat_index, &counts);
4225 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4226 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4228 if (fchild && p && p->lifetime_maxdata)
4230 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4232 fchild->time_to_expiration = now;
4238 ikev2_process_pending_sa_init (ikev2_main_t * km)
4245 hash_foreach (ispi, sai, km->sa_by_ispi,
4247 sa = pool_elt_at_index (km->sais, sai);
4248 if (sa->init_response_received)
4252 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4255 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4256 clib_memcpy_fast (vlib_buffer_get_current (b),
4257 sa->last_sa_init_req_packet_data,
4258 vec_len (sa->last_sa_init_req_packet_data));
4259 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4260 vec_len (sa->last_sa_init_req_packet_data),
4261 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4266 static vlib_node_registration_t ikev2_mngr_process_node;
4269 ikev2_send_informational_request (ikev2_sa_t * sa)
4271 ikev2_main_t *km = &ikev2_main;
4272 ip4_address_t *src, *dst;
4278 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4281 ikev2_log_error ("buffer alloc failure");
4285 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4286 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4287 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4288 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4289 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4290 len = ikev2_generate_message (sa, ike0, 0, 0);
4292 len = ikev2_insert_non_esp_marker (ike0, len);
4294 if (sa->is_initiator)
4305 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4306 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4310 static_always_inline int
4311 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4313 ikev2_main_t *km = &ikev2_main;
4314 vlib_main_t *vm = km->vlib_main;
4316 if (!sa->sk_ai || !sa->sk_ar)
4319 if (sa->liveness_retries >= km->liveness_max_retries)
4322 f64 now = vlib_time_now (vm);
4324 if (sa->liveness_period_check < now)
4326 sa->liveness_retries++;
4327 sa->liveness_period_check = now + km->liveness_period;
4328 ikev2_send_informational_request (sa);
4334 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4337 ikev2_main_t *km = &ikev2_main;
4338 ipsec_main_t *im = &ipsec_main;
4340 ikev2_child_sa_t *c;
4346 vlib_process_wait_for_event_or_clock (vm, 1);
4347 vlib_process_get_events (vm, NULL);
4349 /* process ike child sas */
4350 ikev2_main_per_thread_data_t *tkm;
4351 vec_foreach (tkm, km->per_thread_data)
4354 u32 *to_be_deleted = 0;
4357 pool_foreach (sa, tkm->sas, ({
4358 ikev2_child_sa_t *c;
4360 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4362 sa->old_remote_id_present = 0;
4366 sa->old_id_expiration -= 1;
4368 vec_foreach (c, sa->childs)
4370 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4373 if (ikev2_mngr_process_responder_sas (sa))
4374 vec_add1 (to_be_deleted, sa - tkm->sas);
4378 vec_foreach (sai, to_be_deleted)
4380 sa = pool_elt_at_index (tkm->sas, sai[0]);
4381 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4382 vec_foreach (c, sa->childs)
4384 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4385 ikev2_sa_del_child_sa (sa, c);
4387 ikev2_sa_free_all_vec (sa);
4388 hash_unset (tkm->sa_by_rspi, sa->rspi);
4389 pool_put (tkm->sas, sa);
4393 p = pool_elt_at_index (km->profiles, sa->profile_index);
4396 ikev2_initiate_sa_init (vm, p->name);
4400 vec_free (to_be_deleted);
4403 /* process ipsec sas */
4406 pool_foreach (sa, im->sad, ({
4407 ikev2_mngr_process_ipsec_sa(sa);
4411 ikev2_process_pending_sa_init (km);
4415 vlib_process_wait_for_event_or_clock (vm, 5);
4416 vlib_process_get_events (vm, NULL);
4425 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4426 .function = ikev2_mngr_process_fn,
4427 .type = VLIB_NODE_TYPE_PROCESS,
4429 "ikev2-manager-process",
4432 VLIB_PLUGIN_REGISTER () = {
4433 .version = VPP_BUILD_VER,
4434 .description = "Internet Key Exchange (IKEv2) Protocol",
4439 * fd.io coding-style-patch-verification: ON
4442 * eval: (c-set-style "gnu")