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->r_nonce);
301 vec_free (sa->dh_shared_key);
302 vec_free (sa->dh_private_key);
303 vec_free (sa->i_dh_data);
304 vec_free (sa->r_dh_data);
306 ikev2_sa_free_proposal_vector (&sa->r_proposals);
307 ikev2_sa_free_proposal_vector (&sa->i_proposals);
310 vec_free (sa->sk_ai);
311 vec_free (sa->sk_ar);
312 vec_free (sa->sk_ei);
313 vec_free (sa->sk_er);
314 vec_free (sa->sk_pi);
315 vec_free (sa->sk_pr);
317 vec_free (sa->i_id.data);
318 vec_free (sa->r_id.data);
320 vec_free (sa->i_auth.data);
322 EVP_PKEY_free (sa->i_auth.key);
323 vec_free (sa->r_auth.data);
325 EVP_PKEY_free (sa->r_auth.key);
329 vec_free (sa->rekey);
331 vec_free (sa->last_sa_init_req_packet_data);
332 vec_free (sa->last_sa_init_res_packet_data);
334 vec_free (sa->last_res_packet_data);
336 ikev2_sa_free_all_child_sa (&sa->childs);
340 ikev2_delete_sa (ikev2_sa_t * sa)
342 ikev2_main_t *km = &ikev2_main;
343 u32 thread_index = vlib_get_thread_index ();
346 ikev2_sa_free_all_vec (sa);
348 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
351 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
352 pool_put (km->per_thread_data[thread_index].sas, sa);
357 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
359 ikev2_sa_transform_t *t = 0, *t2;
360 ikev2_main_t *km = &ikev2_main;
362 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
367 /* check if received DH group is on our list of supported groups */
368 vec_foreach (t2, km->supported_transforms)
370 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
379 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
383 if (sa->is_initiator)
386 RAND_bytes ((u8 *) & sa->ispi, 8);
389 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
390 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
395 RAND_bytes ((u8 *) & sa->rspi, 8);
398 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
399 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
402 /* generate dh keys */
403 ikev2_generate_dh (sa, t);
408 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
410 ikev2_sa_transform_t *t = 0, *t2;
411 ikev2_main_t *km = &ikev2_main;
413 /*move some data to the new SA */
414 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
415 sa->i_nonce = _(sai->i_nonce);
416 sa->i_dh_data = _(sai->i_dh_data);
417 sa->dh_private_key = _(sai->dh_private_key);
418 sa->iaddr.as_u32 = sai->iaddr.as_u32;
419 sa->raddr.as_u32 = sai->raddr.as_u32;
420 sa->is_initiator = sai->is_initiator;
421 sa->i_id.type = sai->i_id.type;
422 sa->r_id.type = sai->r_id.type;
423 sa->profile_index = sai->profile_index;
424 sa->tun_itf = sai->tun_itf;
425 sa->is_tun_itf_set = sai->is_tun_itf_set;
426 sa->i_id.data = _(sai->i_id.data);
427 sa->r_id.data = _(sai->r_id.data);
428 sa->i_auth.method = sai->i_auth.method;
429 sa->i_auth.hex = sai->i_auth.hex;
430 sa->i_auth.data = _(sai->i_auth.data);
431 sa->i_auth.key = _(sai->i_auth.key);
432 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
433 sa->childs = _(sai->childs);
434 sa->udp_encap = sai->udp_encap;
435 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
436 sa->dst_port = sai->dst_port;
437 sa->sw_if_index = sai->sw_if_index;
441 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
446 /* check if received DH group is on our list of supported groups */
447 vec_foreach (t2, km->supported_transforms)
449 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
458 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
463 /* generate dh keys */
464 ikev2_complete_dh (sa, t);
469 ikev2_calc_keys (ikev2_sa_t * sa)
472 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
475 u16 integ_key_len = 0, salt_len = 0;
476 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
478 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
480 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
482 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
485 integ_key_len = tr_integ->key_len;
487 salt_len = sizeof (u32);
489 vec_append (s, sa->i_nonce);
490 vec_append (s, sa->r_nonce);
491 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
493 /* Calculate S = Ni | Nr | SPIi | SPIr */
495 vec_add2 (s, tmp, 2 * sizeof (*spi));
497 spi[0] = clib_host_to_net_u64 (sa->ispi);
498 spi[1] = clib_host_to_net_u64 (sa->rspi);
500 /* calculate PRFplus */
502 int len = tr_prf->key_trunc + /* SK_d */
503 integ_key_len * 2 + /* SK_ai, SK_ar */
504 tr_encr->key_len * 2 + /* SK_ei, SK_er */
505 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
508 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
515 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
516 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
517 pos += tr_prf->key_trunc;
522 sa->sk_ai = vec_new (u8, integ_key_len);
523 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
524 pos += integ_key_len;
527 sa->sk_ar = vec_new (u8, integ_key_len);
528 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
529 pos += integ_key_len;
533 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
534 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
535 pos += tr_encr->key_len + salt_len;
538 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
539 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
540 pos += tr_encr->key_len + salt_len;
543 sa->sk_pi = vec_new (u8, tr_prf->key_len);
544 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
545 pos += tr_prf->key_len;
548 sa->sk_pr = vec_new (u8, tr_prf->key_len);
549 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
550 pos += tr_prf->key_len;
553 sa->keys_generated = 1;
557 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
560 u16 integ_key_len = 0;
563 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
565 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
567 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
569 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
572 integ_key_len = ctr_integ->key_len;
574 salt_len = sizeof (u32);
576 vec_append (s, sa->i_nonce);
577 vec_append (s, sa->r_nonce);
578 /* calculate PRFplus */
580 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
582 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
587 child->sk_ei = vec_new (u8, ctr_encr->key_len);
588 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
589 pos += ctr_encr->key_len;
594 child->sk_ai = vec_new (u8, ctr_integ->key_len);
595 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
596 pos += ctr_integ->key_len;
600 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
605 child->sk_er = vec_new (u8, ctr_encr->key_len);
606 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
607 pos += ctr_encr->key_len;
612 child->sk_ar = vec_new (u8, integ_key_len);
613 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
614 pos += integ_key_len;
618 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
627 static_always_inline u8 *
628 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
630 /* ispi, rspi, ip, port */
631 u8 buf[8 + 8 + 4 + 2];
632 u8 *res = vec_new (u8, 20);
634 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
635 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
636 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
637 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
638 SHA1 (buf, sizeof (buf), res);
643 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
644 ike_header_t * ike, udp_header_t * udp, u32 len)
647 u8 payload = ike->nextpayload;
649 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
651 clib_net_to_host_u64 (ike->ispi),
652 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
654 sa->ispi = clib_net_to_host_u64 (ike->ispi);
656 /* store whole IKE payload - needed for PSK auth */
657 vec_reset_length (sa->last_sa_init_req_packet_data);
658 vec_add (sa->last_sa_init_req_packet_data, ike, len);
660 while (p < len && payload != IKEV2_PAYLOAD_NONE)
662 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
663 u32 plen = clib_net_to_host_u16 (ikep->length);
665 if (plen < sizeof (ike_payload_header_t))
668 if (payload == IKEV2_PAYLOAD_SA)
670 ikev2_sa_free_proposal_vector (&sa->i_proposals);
671 sa->i_proposals = ikev2_parse_sa_payload (ikep);
673 else if (payload == IKEV2_PAYLOAD_KE)
675 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
676 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
677 vec_free (sa->i_dh_data);
678 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
680 else if (payload == IKEV2_PAYLOAD_NONCE)
682 vec_free (sa->i_nonce);
683 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
685 else if (payload == IKEV2_PAYLOAD_NOTIFY)
687 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
688 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
690 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0,
693 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
696 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
697 " behind NAT", sa->ispi);
701 else if (n->msg_type ==
702 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
704 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0,
707 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
710 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
711 " (self) behind NAT", sa->ispi);
717 else if (payload == IKEV2_PAYLOAD_VENDOR)
719 ikev2_parse_vendor_payload (ikep);
723 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
725 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
727 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
728 sa->unsupported_cp = payload;
733 payload = ikep->nextpayload;
737 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
741 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
742 ike_header_t * ike, udp_header_t * udp, u32 len)
745 u8 payload = ike->nextpayload;
747 sa->ispi = clib_net_to_host_u64 (ike->ispi);
748 sa->rspi = clib_net_to_host_u64 (ike->rspi);
750 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
751 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
754 /* store whole IKE payload - needed for PSK auth */
755 vec_reset_length (sa->last_sa_init_res_packet_data);
756 vec_add (sa->last_sa_init_res_packet_data, ike, len);
758 while (p < len && payload != IKEV2_PAYLOAD_NONE)
760 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
761 u32 plen = clib_net_to_host_u16 (ikep->length);
763 if (plen < sizeof (ike_payload_header_t))
766 if (payload == IKEV2_PAYLOAD_SA)
768 ikev2_sa_free_proposal_vector (&sa->r_proposals);
769 sa->r_proposals = ikev2_parse_sa_payload (ikep);
772 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
774 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
777 else if (payload == IKEV2_PAYLOAD_KE)
779 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
780 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
781 vec_free (sa->r_dh_data);
782 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
784 else if (payload == IKEV2_PAYLOAD_NONCE)
786 vec_free (sa->r_nonce);
787 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
789 else if (payload == IKEV2_PAYLOAD_NOTIFY)
791 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
792 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
794 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
798 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
800 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
801 " behind NAT, unsupported", sa->ispi);
805 else if (n->msg_type ==
806 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
808 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
812 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
815 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
816 " (self) behind NAT", sa->ispi);
822 else if (payload == IKEV2_PAYLOAD_VENDOR)
824 ikev2_parse_vendor_payload (ikep);
828 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
830 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
832 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
833 sa->unsupported_cp = payload;
838 payload = ikep->nextpayload;
844 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload,
847 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
849 u8 last_payload = 0, *plaintext = 0;
851 ike_payload_header_t *ikep = 0;
853 ikev2_sa_transform_t *tr_integ;
854 ikev2_sa_transform_t *tr_encr;
856 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
858 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
859 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
861 if ((!sa->sk_ar || !sa->sk_ai) && !is_aead)
865 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
867 ikep = (ike_payload_header_t *) & ike->payload[p];
868 plen = clib_net_to_host_u16 (ikep->length);
870 if (plen < sizeof (*ikep))
873 if (*payload == IKEV2_PAYLOAD_SK)
875 last_payload = *payload;
879 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
881 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
883 sa->unsupported_cp = *payload;
888 *payload = ikep->nextpayload;
892 if (last_payload != IKEV2_PAYLOAD_SK)
894 ikev2_elog_error ("Last payload must be SK");
900 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
903 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
904 u8 *aad = (u8 *) ike;
905 u32 aad_len = ikep->payload - aad;
906 u8 *tag = ikep->payload + plen;
908 plaintext = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
909 plen, aad, aad_len, tag);
913 if (len < tr_integ->key_trunc)
917 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
918 (u8 *) ike, len - tr_integ->key_trunc);
920 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
923 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
925 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
927 ikev2_elog_error ("message integrity check failed");
933 plaintext = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen);
939 static_always_inline int
940 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
942 if (i1->type != i2->type)
945 if (vec_len (i1->data) != vec_len (i2->data))
948 if (memcmp (i1->data, i2->data, vec_len (i1->data)))
955 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
957 ikev2_main_t *km = &ikev2_main;
961 u32 thread_index = vlib_get_thread_index ();
963 if (!sa->initial_contact)
966 /* find old IKE SAs with the same authenticated identity */
968 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
969 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
970 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
973 if (sa->rspi != tmp->rspi)
974 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
978 for (i = 0; i < vec_len (delete); i++)
981 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
983 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
985 ikev2_delete_sa (tmp);
989 sa->initial_contact = 0;
993 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike,
996 ikev2_child_sa_t *first_child_sa;
998 u8 payload = ike->nextpayload;
1000 ike_payload_header_t *ikep;
1003 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1004 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1005 clib_host_to_net_u64 (ike->rspi),
1006 sa->is_initiator ? sa->raddr.as_u32 : sa->
1009 ikev2_calc_keys (sa);
1011 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1015 if (sa->unsupported_cp)
1016 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1017 goto cleanup_and_exit;
1020 /* select or create 1st child SA */
1021 if (sa->is_initiator)
1023 first_child_sa = &sa->childs[0];
1027 ikev2_sa_free_all_child_sa (&sa->childs);
1028 vec_add2 (sa->childs, first_child_sa, 1);
1032 /* process encrypted payload */
1034 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1036 ikep = (ike_payload_header_t *) & plaintext[p];
1037 plen = clib_net_to_host_u16 (ikep->length);
1039 if (plen < sizeof (ike_payload_header_t))
1040 goto cleanup_and_exit;
1042 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1044 if (sa->is_initiator)
1046 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1047 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
1051 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1052 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
1055 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1057 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1059 sa->i_id.type = id->id_type;
1060 vec_free (sa->i_id.data);
1061 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
1063 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1065 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
1067 sa->r_id.type = id->id_type;
1068 vec_free (sa->r_id.data);
1069 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
1071 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1073 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
1075 if (sa->is_initiator)
1077 sa->r_auth.method = a->auth_method;
1078 vec_free (sa->r_auth.data);
1079 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
1083 sa->i_auth.method = a->auth_method;
1084 vec_free (sa->i_auth.data);
1085 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
1088 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1090 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1091 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1093 sa->initial_contact = 1;
1097 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1099 ikev2_parse_vendor_payload (ikep);
1101 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1103 vec_free (first_child_sa->tsi);
1104 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
1106 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1108 vec_free (first_child_sa->tsr);
1109 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
1113 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1116 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1118 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1119 sa->unsupported_cp = payload;
1124 payload = ikep->nextpayload;
1129 vec_free (plaintext);
1133 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1134 ike_header_t * ike, u32 len)
1137 u8 payload = ike->nextpayload;
1139 ike_payload_header_t *ikep;
1142 sa->liveness_retries = 0;
1143 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1144 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1145 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1147 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1150 goto cleanup_and_exit;
1152 /* process encrypted payload */
1154 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1156 ikep = (ike_payload_header_t *) & plaintext[p];
1157 plen = clib_net_to_host_u16 (ikep->length);
1159 if (plen < sizeof (ike_payload_header_t))
1160 goto cleanup_and_exit;
1162 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1164 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1165 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1166 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1169 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1171 sa->del = ikev2_parse_delete_payload (ikep);
1173 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1175 ikev2_parse_vendor_payload (ikep);
1179 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1181 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1183 sa->unsupported_cp = payload;
1188 payload = ikep->nextpayload;
1193 vec_free (plaintext);
1197 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1198 ike_header_t * ike, u32 len)
1201 u8 payload = ike->nextpayload;
1204 u8 nonce[IKEV2_NONCE_SIZE];
1206 ike_payload_header_t *ikep;
1208 ikev2_notify_t *n = 0;
1209 ikev2_ts_t *tsi = 0;
1210 ikev2_ts_t *tsr = 0;
1211 ikev2_sa_proposal_t *proposal = 0;
1212 ikev2_child_sa_t *child_sa;
1214 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1215 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1216 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1218 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len);
1221 goto cleanup_and_exit;
1223 /* process encrypted payload */
1225 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1227 ikep = (ike_payload_header_t *) & plaintext[p];
1228 plen = clib_net_to_host_u16 (ikep->length);
1230 if (plen < sizeof (ike_payload_header_t))
1231 goto cleanup_and_exit;
1233 else if (payload == IKEV2_PAYLOAD_SA)
1235 proposal = ikev2_parse_sa_payload (ikep);
1237 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1239 n = ikev2_parse_notify_payload (ikep);
1240 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1245 else if (payload == IKEV2_PAYLOAD_DELETE)
1247 sa->del = ikev2_parse_delete_payload (ikep);
1249 else if (payload == IKEV2_PAYLOAD_VENDOR)
1251 ikev2_parse_vendor_payload (ikep);
1253 else if (payload == IKEV2_PAYLOAD_NONCE)
1255 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1257 else if (payload == IKEV2_PAYLOAD_TSI)
1259 tsi = ikev2_parse_ts_payload (ikep);
1261 else if (payload == IKEV2_PAYLOAD_TSR)
1263 tsr = ikev2_parse_ts_payload (ikep);
1267 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1269 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1271 sa->unsupported_cp = payload;
1272 goto cleanup_and_exit;
1276 payload = ikep->nextpayload;
1280 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1282 ikev2_rekey_t *rekey = &sa->rekey[0];
1283 rekey->protocol_id = proposal->protocol_id;
1285 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1286 rekey->i_proposal->spi = rekey->spi;
1287 rekey->r_proposal = proposal;
1291 vec_free (sa->r_nonce);
1292 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1293 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1296 child_sa->rekey_retries = 0;
1301 ikev2_rekey_t *rekey;
1302 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1305 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1307 goto cleanup_and_exit;
1309 vec_add2 (sa->rekey, rekey, 1);
1310 rekey->protocol_id = n->protocol_id;
1311 rekey->spi = n->spi;
1312 rekey->i_proposal = proposal;
1314 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1318 vec_free (sa->i_nonce);
1319 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1320 /* generate new Nr */
1321 vec_free (sa->r_nonce);
1322 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1323 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1327 vec_free (plaintext);
1332 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1340 ikev2_sa_transform_t *tr_prf;
1343 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1349 nonce = sa->i_nonce;
1350 packet_data = sa->last_sa_init_res_packet_data;
1356 nonce = sa->r_nonce;
1357 packet_data = sa->last_sa_init_req_packet_data;
1360 data = vec_new (u8, 4);
1362 vec_append (data, id->data);
1364 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1365 vec_append (authmsg, packet_data);
1366 vec_append (authmsg, nonce);
1367 vec_append (authmsg, id_hash);
1375 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1377 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1378 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1379 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1380 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1387 ikev2_sa_match_ts (ikev2_sa_t * sa)
1389 ikev2_main_t *km = &ikev2_main;
1391 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1392 ikev2_id_t *id_rem, *id_loc;
1395 pool_foreach (p, km->profiles, ({
1397 if (sa->is_initiator)
1413 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1414 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1417 sa->profile_index = p - km->profiles;
1419 vec_foreach(ts, sa->childs[0].tsi)
1421 if (ikev2_ts_cmp(p_tsi, ts))
1423 vec_add1 (tsi, ts[0]);
1428 vec_foreach(ts, sa->childs[0].tsr)
1430 if (ikev2_ts_cmp(p_tsr, ts))
1432 vec_add1 (tsr, ts[0]);
1443 vec_free (sa->childs[0].tsi);
1444 vec_free (sa->childs[0].tsr);
1445 sa->childs[0].tsi = tsi;
1446 sa->childs[0].tsr = tsr;
1452 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1457 ikev2_sa_auth (ikev2_sa_t * sa)
1459 ikev2_main_t *km = &ikev2_main;
1460 ikev2_profile_t *p, *sel_p = 0;
1461 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1462 ikev2_sa_transform_t *tr_prf;
1465 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1467 /* only shared key and rsa signature */
1468 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1469 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1471 ikev2_elog_uint (IKEV2_LOG_ERROR,
1472 "unsupported authentication method %u",
1474 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1478 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1479 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1481 ikev2_id_t *id_rem, *id_loc;
1482 ikev2_auth_t *sa_auth;
1484 if (sa->is_initiator)
1488 sa_auth = &sa->r_auth;
1494 sa_auth = &sa->i_auth;
1498 pool_foreach (p, km->profiles, ({
1501 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1502 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1505 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1507 if (!p->auth.data ||
1508 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1511 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1512 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1514 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1516 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1523 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1525 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1528 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1530 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1543 sa->udp_encap = sel_p->udp_encap;
1544 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1548 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1550 if (!sa->is_initiator)
1552 vec_free (sa->r_id.data);
1553 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1554 sa->r_id.type = sel_p->loc_id.type;
1555 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1556 sa->i_id.type = sel_p->rem_id.type;
1558 /* generate our auth data */
1559 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1560 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1562 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1563 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1565 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1567 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1568 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1572 /* select transforms for 1st child sa */
1573 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1574 sa->childs[0].r_proposals =
1575 ikev2_select_proposal (sa->childs[0].i_proposals,
1576 IKEV2_PROTOCOL_ESP);
1578 if (~0 != sel_p->tun_itf)
1580 sa->is_tun_itf_set = 1;
1581 sa->tun_itf = sel_p->tun_itf;
1587 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1588 "profile found! ispi %lx", sa->ispi);
1589 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1597 ikev2_sa_auth_init (ikev2_sa_t * sa)
1599 ikev2_main_t *km = &ikev2_main;
1600 u8 *authmsg, *key_pad, *psk = 0;
1601 ikev2_sa_transform_t *tr_prf;
1604 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1606 /* only shared key and rsa signature */
1607 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1608 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1610 ikev2_elog_uint (IKEV2_LOG_ERROR,
1611 "unsupported authentication method %u",
1613 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1617 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1618 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1619 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1621 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1623 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1624 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1626 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1628 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1629 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1638 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1640 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1644 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1646 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1656 ipsec_sa_flags_t flags;
1659 ipsec_crypto_alg_t encr_type;
1660 ipsec_integ_alg_t integ_type;
1661 ip46_address_t local_ip;
1662 ip46_address_t remote_ip;
1663 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1665 u32 old_remote_sa_id;
1666 u16 ipsec_over_udp_port;
1669 } ikev2_add_ipsec_tunnel_args_t;
1672 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1674 ikev2_main_t *km = &ikev2_main;
1678 if (~0 == a->sw_if_index)
1680 /* no tunnel associated with the SA/profile - create a new one */
1681 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1682 &a->local_ip, &a->remote_ip, 0,
1683 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1684 TUNNEL_MODE_P2P, &sw_if_index);
1686 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1688 if (hash_get (km->sw_if_indices, sw_if_index))
1689 /* interface is managed by IKE; proceed with updating SAs */
1692 hash_set1 (km->sw_if_indices, sw_if_index);
1696 sw_if_index = a->sw_if_index;
1697 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1702 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1703 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1704 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1709 vec_add1 (sas_in, a->remote_sa_id);
1712 ipsec_tun_protect_del (sw_if_index, NULL);
1714 /* replace local SA immediately */
1715 ipsec_sa_unlock_id (a->local_sa_id);
1717 /* keep the old sa */
1718 vec_add1 (sas_in, a->old_remote_sa_id);
1721 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1723 IPSEC_PROTOCOL_ESP, a->encr_type,
1724 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1725 a->flags, 0, a->salt_local, &a->local_ip,
1726 &a->remote_ip, NULL, a->src_port, a->dst_port);
1727 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1728 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1729 a->integ_type, &a->rem_ikey,
1730 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1731 a->salt_remote, &a->remote_ip,
1732 &a->local_ip, NULL, a->ipsec_over_udp_port,
1733 a->ipsec_over_udp_port);
1735 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1739 ikev2_create_tunnel_interface (vlib_main_t * vm,
1742 ikev2_child_sa_t * child, u32 sa_index,
1743 u32 child_index, u8 is_rekey)
1745 ikev2_main_t *km = &ikev2_main;
1746 ipsec_crypto_alg_t encr_type;
1747 ipsec_integ_alg_t integ_type;
1748 ikev2_profile_t *p = 0;
1749 ikev2_sa_transform_t *tr;
1750 ikev2_sa_proposal_t *proposals;
1752 ikev2_add_ipsec_tunnel_args_t a;
1754 clib_memset (&a, 0, sizeof (a));
1756 if (!child->r_proposals)
1758 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1762 if (sa->is_initiator)
1764 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1765 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1766 proposals = child->r_proposals;
1767 a.local_spi = child->r_proposals[0].spi;
1768 a.remote_spi = child->i_proposals[0].spi;
1772 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1773 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1774 proposals = child->i_proposals;
1775 a.local_spi = child->i_proposals[0].spi;
1776 a.remote_spi = child->r_proposals[0].spi;
1779 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1782 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1783 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1786 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1787 a.is_rekey = is_rekey;
1789 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1790 if (tr && tr->esn_type)
1791 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1793 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1796 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1798 switch (tr->key_len)
1801 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1804 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1807 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1810 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1815 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1818 switch (tr->key_len)
1821 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1824 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1827 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1830 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1838 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1844 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1847 a.encr_type = encr_type;
1851 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1854 switch (tr->integ_type)
1856 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1857 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1859 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1860 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1862 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1863 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1865 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1866 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1869 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1875 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1881 integ_type = IPSEC_INTEG_ALG_NONE;
1884 a.integ_type = integ_type;
1885 ikev2_calc_child_keys (sa, child);
1887 if (sa->is_initiator)
1889 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1890 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1891 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1892 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1895 a.salt_remote = child->salt_er;
1896 a.salt_local = child->salt_ei;
1898 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
1902 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1903 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1904 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1905 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1908 a.salt_remote = child->salt_ei;
1909 a.salt_local = child->salt_er;
1911 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
1912 a.src_port = sa->ipsec_over_udp_port;
1915 if (sa->is_initiator && sa->profile_index != ~0)
1916 p = pool_elt_at_index (km->profiles, sa->profile_index);
1918 if (p && p->lifetime)
1920 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
1921 if (p->lifetime_jitter)
1923 // This is not much better than rand(3), which Coverity warns
1924 // is unsuitable for security applications; random_u32 is
1925 // however fast. If this perturbance to the expiration time
1926 // needs to use a better RNG then we may need to use something
1927 // like /dev/urandom which has significant overhead.
1928 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
1929 rnd = random_u32 (&rnd);
1931 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1935 if (thread_index & 0xffffffc0)
1936 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
1938 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1939 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
1941 child->local_sa_id =
1943 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1945 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
1950 /* create a new remote SA ID to keep the old SA for a bit longer
1951 * so the peer has some time to swap their SAs */
1953 /* use most significat bit of child index part in id */
1955 if (sa->current_remote_id_mask)
1957 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
1958 sa->current_remote_id_mask = 0;
1962 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
1963 sa->current_remote_id_mask = mask;
1964 remote_sa_id |= mask;
1966 sa->old_id_expiration = 3.0;
1967 sa->old_remote_id_present = 1;
1970 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
1972 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
1973 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
1975 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1976 (u8 *) & a, sizeof (a));
1982 ip46_address_t local_ip;
1983 ip46_address_t remote_ip;
1987 } ikev2_del_ipsec_tunnel_args_t;
1989 static_always_inline u32
1990 ikev2_flip_alternate_sa_bit (u32 id)
1999 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2001 ikev2_main_t *km = &ikev2_main;
2002 ipip_tunnel_t *ipip = NULL;
2005 if (~0 == a->sw_if_index)
2008 ipip_tunnel_key_t key = {
2010 .dst = a->remote_ip,
2011 .transport = IPIP_TRANSPORT_IP4,
2016 ipip = ipip_tunnel_db_find (&key);
2020 sw_if_index = ipip->sw_if_index;
2021 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2028 sw_if_index = a->sw_if_index;
2029 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2032 if (~0 != sw_if_index)
2033 ipsec_tun_protect_del (sw_if_index, NULL);
2035 ipsec_sa_unlock_id (a->remote_sa_id);
2036 ipsec_sa_unlock_id (a->local_sa_id);
2037 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2040 ipip_del_tunnel (ipip->sw_if_index);
2044 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2045 ikev2_child_sa_t * child)
2047 ikev2_del_ipsec_tunnel_args_t a;
2049 clib_memset (&a, 0, sizeof (a));
2051 if (sa->is_initiator)
2053 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2054 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2058 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2059 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2062 a.remote_sa_id = child->remote_sa_id;
2063 a.local_sa_id = child->local_sa_id;
2064 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2066 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2072 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user,
2076 ike_payload_header_t *ph;
2080 ikev2_sa_transform_t *tr_encr, *tr_integ;
2082 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2084 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2086 ikev2_payload_chain_t *chain = 0;
2087 ikev2_payload_new_chain (chain);
2089 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2091 if (sa->r_proposals == 0)
2093 ikev2_payload_add_notify (chain,
2094 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2095 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2097 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2099 u8 *data = vec_new (u8, 2);
2100 ikev2_sa_transform_t *tr_dh;
2102 ikev2_sa_get_td_for_type (sa->r_proposals,
2103 IKEV2_TRANSFORM_TYPE_DH);
2104 ASSERT (tr_dh && tr_dh->dh_type);
2106 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2107 data[1] = (tr_dh->dh_type) & 0xff;
2109 ikev2_payload_add_notify (chain,
2110 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2113 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2115 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2117 u8 *data = vec_new (u8, 1);
2119 data[0] = sa->unsupported_cp;
2120 ikev2_payload_add_notify (chain,
2121 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2129 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2130 ikev2_payload_add_sa (chain, sa->r_proposals);
2131 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2132 ikev2_payload_add_nonce (chain, sa->r_nonce);
2134 u8 *nat_detection_sha1 =
2135 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2136 clib_host_to_net_u64 (sa->rspi),
2139 ikev2_payload_add_notify (chain,
2140 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2141 nat_detection_sha1);
2142 vec_free (nat_detection_sha1);
2143 nat_detection_sha1 =
2144 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2145 clib_host_to_net_u64 (sa->rspi),
2146 sa->iaddr.as_u32, udp->src_port);
2147 ikev2_payload_add_notify (chain,
2148 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2149 nat_detection_sha1);
2150 vec_free (nat_detection_sha1);
2153 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2155 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2157 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2158 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2159 ikev2_payload_add_auth (chain, &sa->r_auth);
2160 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2161 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2162 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2164 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2166 ikev2_payload_add_notify (chain,
2167 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2169 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2171 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2173 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2175 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2176 ikev2_payload_add_auth (chain, &sa->r_auth);
2178 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2180 ikev2_payload_add_notify (chain,
2181 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2182 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2183 ikev2_payload_add_auth (chain, &sa->r_auth);
2184 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2185 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2187 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2189 u8 *data = vec_new (u8, 1);
2191 data[0] = sa->unsupported_cp;
2192 ikev2_payload_add_notify (chain,
2193 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2197 else if (sa->state == IKEV2_STATE_SA_INIT)
2199 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2200 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2201 ikev2_payload_add_auth (chain, &sa->i_auth);
2202 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2203 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2204 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2205 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2210 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2214 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2216 /* if pending delete */
2219 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2221 if (sa->is_initiator)
2222 ikev2_payload_add_delete (chain, sa->del);
2224 /* The response to a request that deletes the IKE SA is an empty
2225 INFORMATIONAL response. */
2226 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2228 /* The response to a request that deletes ESP or AH SAs will contain
2229 delete payloads for the paired SAs going in the other direction. */
2232 ikev2_payload_add_delete (chain, sa->del);
2237 /* received N(AUTHENTICATION_FAILED) */
2238 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2240 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2243 /* received unsupported critical payload */
2244 else if (sa->unsupported_cp)
2246 u8 *data = vec_new (u8, 1);
2248 data[0] = sa->unsupported_cp;
2249 ikev2_payload_add_notify (chain,
2250 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2253 sa->unsupported_cp = 0;
2255 /* else send empty response */
2257 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2259 if (sa->is_initiator)
2262 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2263 ikev2_notify_t notify;
2264 u8 *data = vec_new (u8, 4);
2265 clib_memset (¬ify, 0, sizeof (notify));
2266 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2267 notify.spi = sa->childs[0].i_proposals->spi;
2268 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2270 ikev2_payload_add_sa (chain, proposals);
2271 ikev2_payload_add_nonce (chain, sa->i_nonce);
2272 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2273 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2274 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2281 if (vec_len (sa->rekey) > 0)
2283 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2284 ikev2_payload_add_nonce (chain, sa->r_nonce);
2285 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2287 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2289 vec_del1 (sa->rekey, 0);
2291 else if (sa->unsupported_cp)
2293 u8 *data = vec_new (u8, 1);
2295 data[0] = sa->unsupported_cp;
2296 ikev2_payload_add_notify (chain,
2297 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2300 sa->unsupported_cp = 0;
2304 ikev2_payload_add_notify (chain,
2305 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2312 ike->version = IKE_VERSION_2;
2313 ike->nextpayload = IKEV2_PAYLOAD_SK;
2314 tlen = sizeof (*ike);
2315 if (sa->is_initiator)
2317 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2318 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2322 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2326 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2328 tlen += vec_len (chain->data);
2329 ike->nextpayload = chain->first_payload_type;
2330 ike->length = clib_host_to_net_u32 (tlen);
2331 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2333 /* store whole IKE payload - needed for PSK auth */
2334 vec_reset_length (sa->last_sa_init_res_packet_data);
2335 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2339 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2340 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2343 plen = sizeof (*ph);
2344 ph = (ike_payload_header_t *) & ike->payload[0];
2345 ph->nextpayload = chain->first_payload_type;
2348 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2349 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2350 plen += vec_len (chain->data) + iv_len;
2352 /* add space for hmac/tag */
2354 plen += tr_integ->key_trunc;
2356 plen += IKEV2_GCM_ICV_SIZE;
2359 /* payload and total length */
2360 ph->length = clib_host_to_net_u16 (plen);
2361 ike->length = clib_host_to_net_u32 (tlen);
2365 ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2366 ph->payload, (u8 *) ike,
2367 sizeof (*ike) + sizeof (*ph),
2368 ph->payload + plen - sizeof (*ph) -
2369 IKEV2_GCM_ICV_SIZE);
2373 ikev2_encrypt_data (ptd, sa, tr_encr, chain->data, ph->payload);
2375 ikev2_calc_integr (tr_integ,
2376 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2377 (u8 *) ike, tlen - tr_integ->key_trunc);
2378 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2379 sizeof (*ike), integ, tr_integ->key_trunc);
2382 /* store whole IKE payload - needed for retransmit */
2383 vec_reset_length (sa->last_res_packet_data);
2384 vec_add (sa->last_res_packet_data, ike, tlen);
2388 ikev2_payload_destroy_chain (chain);
2394 ikev2_retransmit_sa_init (ike_header_t * ike,
2395 ip4_address_t iaddr, ip4_address_t raddr, u32 rlen)
2397 ikev2_main_t *km = &ikev2_main;
2399 u32 thread_index = vlib_get_thread_index ();
2402 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2403 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2404 sa->iaddr.as_u32 == iaddr.as_u32 &&
2405 sa->raddr.as_u32 == raddr.as_u32)
2408 u8 payload = ike->nextpayload;
2410 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2411 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2412 u32 plen = clib_net_to_host_u16(ikep->length);
2414 if (plen < sizeof(ike_payload_header_t))
2417 if (payload == IKEV2_PAYLOAD_NONCE)
2419 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2421 /* req is retransmit */
2422 if (sa->state == IKEV2_STATE_SA_INIT)
2424 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2425 u32 slen = clib_net_to_host_u32(tmp->length);
2426 ike->ispi = tmp->ispi;
2427 ike->rspi = tmp->rspi;
2428 ike->nextpayload = tmp->nextpayload;
2429 ike->version = tmp->version;
2430 ike->exchange = tmp->exchange;
2431 ike->flags = tmp->flags;
2432 ike->msgid = tmp->msgid;
2433 ike->length = tmp->length;
2434 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2435 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2436 "ispi %lx IKE_SA_INIT retransmit "
2437 "from %d.%d.%d.%d to %d.%d.%d.%d",
2439 raddr.as_u32, iaddr.as_u32);
2442 /* else ignore req */
2445 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2446 "ispi %lx IKE_SA_INIT ignore "
2447 "from %d.%d.%d.%d to %d.%d.%d.%d",
2449 raddr.as_u32, iaddr.as_u32);
2454 payload = ikep->nextpayload;
2461 /* req is not retransmit */
2466 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike, u32 rlen)
2468 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2471 if (msg_id > sa->last_msg_id)
2473 sa->last_msg_id = msg_id;
2477 /* retransmitted req */
2478 if (msg_id == sa->last_msg_id)
2480 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2481 u32 slen = clib_net_to_host_u32 (tmp->length);
2482 ike->ispi = tmp->ispi;
2483 ike->rspi = tmp->rspi;
2484 ike->nextpayload = tmp->nextpayload;
2485 ike->version = tmp->version;
2486 ike->exchange = tmp->exchange;
2487 ike->flags = tmp->flags;
2488 ike->msgid = tmp->msgid;
2489 ike->length = tmp->length;
2490 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2491 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2492 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2496 /* old req ignore */
2497 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2498 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2503 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2505 ikev2_main_t *km = &ikev2_main;
2506 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2507 sa->profile_index = ~0;
2511 ikev2_del_sa_init_from_main (u64 * ispi)
2513 ikev2_main_t *km = &ikev2_main;
2514 uword *p = hash_get (km->sa_by_ispi, *ispi);
2517 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2518 hash_unset (km->sa_by_ispi, sai->ispi);
2519 ikev2_sa_free_all_vec (sai);
2520 pool_put (km->sais, sai);
2525 ikev2_del_sa_init (u64 ispi)
2527 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2532 ikev2_node_fn (vlib_main_t * vm,
2533 vlib_node_runtime_t * node, vlib_frame_t * frame)
2535 u32 n_left_from, *from, *to_next;
2536 ikev2_next_t next_index;
2537 ikev2_main_t *km = &ikev2_main;
2538 u32 thread_index = vlib_get_thread_index ();
2540 from = vlib_frame_vector_args (frame);
2541 n_left_from = frame->n_vectors;
2542 next_index = node->cached_next_index;
2544 while (n_left_from > 0)
2548 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2550 while (n_left_from > 0 && n_left_to_next > 0)
2554 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2559 ikev2_sa_t *sa0 = 0;
2560 ikev2_sa_t sa; /* temporary store for SA */
2562 int is_req = 0, has_non_esp_marker = 0;
2564 /* speculatively enqueue b0 to the current next frame */
2570 n_left_to_next -= 1;
2572 b0 = vlib_get_buffer (vm, bi0);
2574 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2576 u8 *ptr = vlib_buffer_get_current (b0);
2577 ip40 = (ip4_header_t *) ptr;
2578 ptr += sizeof (*ip40);
2579 udp0 = (udp_header_t *) ptr;
2580 ptr += sizeof (*udp0);
2581 ike0 = (ike_header_t *) ptr;
2585 ike0 = vlib_buffer_get_current (b0);
2586 vlib_buffer_advance (b0, -sizeof (*udp0));
2587 udp0 = vlib_buffer_get_current (b0);
2588 vlib_buffer_advance (b0, -sizeof (*ip40));
2589 ip40 = vlib_buffer_get_current (b0);
2592 rlen = b0->current_length - sizeof (*ip40) - sizeof (*udp0);
2594 /* check for non-esp marker */
2595 if (*((u32 *) ike0) == 0)
2598 (ike_header_t *) ((u8 *) ike0 +
2599 sizeof (ikev2_non_esp_marker));
2600 rlen -= sizeof (ikev2_non_esp_marker);
2601 has_non_esp_marker = 1;
2604 if (clib_net_to_host_u32 (ike0->length) != rlen)
2606 vlib_node_increment_counter (vm, ikev2_node.index,
2607 IKEV2_ERROR_BAD_LENGTH, 1);
2611 if (ike0->version != IKE_VERSION_2)
2613 vlib_node_increment_counter (vm, ikev2_node.index,
2614 IKEV2_ERROR_NOT_IKEV2, 1);
2618 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2621 clib_memset (sa0, 0, sizeof (*sa0));
2623 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2625 if (ike0->rspi == 0)
2627 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2628 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2629 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2632 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2636 vlib_node_increment_counter (vm, ikev2_node.index,
2639 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2641 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2646 ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2648 if (sa0->state == IKEV2_STATE_SA_INIT)
2650 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2652 ikev2_select_proposal (sa0->i_proposals,
2653 IKEV2_PROTOCOL_IKE);
2654 ikev2_generate_sa_init_data (sa0);
2657 if (sa0->state == IKEV2_STATE_SA_INIT
2658 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2660 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2663 if (sa0->state == IKEV2_STATE_SA_INIT)
2665 /* add SA to the pool */
2666 pool_get (km->per_thread_data[thread_index].sas,
2668 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2669 ikev2_init_sa (vm, sa0);
2671 per_thread_data[thread_index].sa_by_rspi,
2674 km->per_thread_data[thread_index].sas);
2678 ikev2_sa_free_all_vec (sa0);
2682 else //received sa_init without initiator flag
2684 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2685 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2686 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2688 if (sa0->state == IKEV2_STATE_SA_INIT)
2691 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2692 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2696 pool_elt_at_index (km->sais, p[0]);
2698 if (clib_atomic_bool_cmp_and_swap
2699 (&sai->init_response_received, 0, 1))
2701 ikev2_complete_sa_data (sa0, sai);
2702 ikev2_calc_keys (sa0);
2703 ikev2_sa_auth_init (sa0);
2705 ikev2_generate_message (sa0, ike0, 0, udp0);
2709 /* we've already processed sa-init response */
2710 sa0->state = IKEV2_STATE_UNKNOWN;
2715 if (sa0->state == IKEV2_STATE_SA_INIT)
2717 /* add SA to the pool */
2718 pool_get (km->per_thread_data[thread_index].sas, sa0);
2719 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2720 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2722 sa0 - km->per_thread_data[thread_index].sas);
2726 ikev2_sa_free_all_vec (sa0);
2730 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2733 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2734 clib_net_to_host_u64 (ike0->rspi));
2738 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2741 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2744 vlib_node_increment_counter (vm, ikev2_node.index,
2747 IKEV2_ERROR_IKE_REQ_IGNORE
2749 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2754 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2755 ikev2_process_auth_req (vm, sa0, ike0, rlen);
2756 ikev2_sa_auth (sa0);
2757 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2759 ikev2_initial_contact_cleanup (sa0);
2760 ikev2_sa_match_ts (sa0);
2761 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2762 ikev2_create_tunnel_interface (vm, thread_index, sa0,
2767 if (sa0->is_initiator)
2769 ikev2_del_sa_init (sa0->ispi);
2773 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2777 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2780 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2781 clib_net_to_host_u64 (ike0->rspi));
2785 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2788 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2791 vlib_node_increment_counter (vm, ikev2_node.index,
2794 IKEV2_ERROR_IKE_REQ_IGNORE
2796 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2801 ikev2_process_informational_req (vm, sa0, ike0, rlen);
2804 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2806 ikev2_delete_t *d, *tmp, *resp = 0;
2807 vec_foreach (d, sa0->del)
2809 ikev2_child_sa_t *ch_sa;
2810 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2812 !sa0->is_initiator);
2815 ikev2_delete_tunnel_interface (km->vnet_main,
2817 if (!sa0->is_initiator)
2819 vec_add2 (resp, tmp, 1);
2820 tmp->protocol_id = d->protocol_id;
2821 tmp->spi = ch_sa->r_proposals[0].spi;
2823 ikev2_sa_del_child_sa (sa0, ch_sa);
2826 if (!sa0->is_initiator)
2828 vec_free (sa0->del);
2833 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2835 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2836 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2840 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2843 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2844 clib_net_to_host_u64 (ike0->rspi));
2848 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2851 slen = ikev2_retransmit_resp (sa0, ike0, rlen);
2854 vlib_node_increment_counter (vm, ikev2_node.index,
2857 IKEV2_ERROR_IKE_REQ_IGNORE
2859 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2864 ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
2867 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2870 ikev2_sa_free_all_child_sa (&sa0->childs);
2871 ikev2_child_sa_t *child;
2872 vec_add2 (sa0->childs, child, 1);
2873 clib_memset (child, 0, sizeof (*child));
2874 child->r_proposals = sa0->rekey[0].r_proposal;
2875 child->i_proposals = sa0->rekey[0].i_proposal;
2876 child->tsi = sa0->rekey[0].tsi;
2877 child->tsr = sa0->rekey[0].tsr;
2878 ikev2_create_tunnel_interface (vm, thread_index,
2880 child - sa0->childs,
2883 if (sa0->is_initiator)
2885 vec_free (sa0->rekey);
2889 slen = ikev2_generate_message (sa0, ike0, 0, udp0);
2896 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2897 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2899 ip40->src_address.as_u32,
2900 ip40->dst_address.as_u32);
2904 /* if we are sending packet back, rewrite headers */
2905 if (slen && ~0 != slen)
2907 next0 = IKEV2_NEXT_IP4_LOOKUP;
2908 if (sa0->is_initiator)
2910 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2911 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2915 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2916 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2921 udp0->dst_port = udp0->src_port =
2922 clib_net_to_host_u16 (ikev2_get_port (sa0));
2924 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
2927 if (!has_non_esp_marker)
2928 slen = ikev2_insert_non_esp_marker (ike0, slen);
2933 if (has_non_esp_marker)
2934 slen += sizeof (ikev2_non_esp_marker);
2936 u16 tp = udp0->dst_port;
2937 udp0->dst_port = udp0->src_port;
2938 udp0->src_port = tp;
2942 clib_host_to_net_u16 (slen + sizeof (udp_header_t));
2944 b0->current_length =
2945 slen + sizeof (ip4_header_t) + sizeof (udp_header_t);
2946 ip40->length = clib_host_to_net_u16 (b0->current_length);
2947 ip40->checksum = ip4_header_checksum (ip40);
2950 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2951 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2953 ikev2_child_sa_t *c;
2955 vec_foreach (c, sa0->childs)
2956 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2958 ikev2_delete_sa (sa0);
2960 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2962 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2963 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2965 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2966 t->sw_if_index = sw_if_index0;
2967 t->next_index = next0;
2970 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2971 n_left_to_next, bi0, next0);
2974 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2977 vlib_node_increment_counter (vm, ikev2_node.index,
2978 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2979 return frame->n_vectors;
2983 VLIB_REGISTER_NODE (ikev2_node,static) = {
2984 .function = ikev2_node_fn,
2986 .vector_size = sizeof (u32),
2987 .format_trace = format_ikev2_trace,
2988 .type = VLIB_NODE_TYPE_INTERNAL,
2990 .n_errors = ARRAY_LEN(ikev2_error_strings),
2991 .error_strings = ikev2_error_strings,
2993 .n_next_nodes = IKEV2_N_NEXT,
2996 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2997 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
3002 // set ikev2 proposals when vpp is used as initiator
3003 static clib_error_t *
3004 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3005 ikev2_transforms_set * ts,
3006 ikev2_sa_proposal_t ** proposals, int is_ike)
3009 ikev2_main_t *km = &ikev2_main;
3010 ikev2_sa_proposal_t *proposal;
3011 vec_add2 (*proposals, proposal, 1);
3012 ikev2_sa_transform_t *td;
3017 vec_foreach (td, km->supported_transforms)
3019 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3020 && td->encr_type == ts->crypto_alg
3021 && td->key_len == ts->crypto_key_size / 8)
3024 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3025 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3026 vec_add (td->attrs, (u8 *) attr, 4);
3027 vec_add1 (proposal->transforms, *td);
3036 r = clib_error_return (0, "Unsupported algorithm");
3040 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3044 vec_foreach (td, km->supported_transforms)
3046 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3047 && td->integ_type == ts->integ_alg)
3049 vec_add1 (proposal->transforms, *td);
3057 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3058 r = clib_error_return (0, "Unsupported algorithm");
3067 vec_foreach (td, km->supported_transforms)
3069 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3070 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3072 vec_add1 (proposal->transforms, *td);
3079 r = clib_error_return (0, "Unsupported algorithm");
3088 vec_foreach (td, km->supported_transforms)
3090 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3092 vec_add1 (proposal->transforms, *td);
3095 sa->dh_group = td->dh_type;
3103 r = clib_error_return (0, "Unsupported algorithm");
3111 vec_foreach (td, km->supported_transforms)
3113 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3115 vec_add1 (proposal->transforms, *td);
3121 r = clib_error_return (0, "Unsupported algorithm");
3130 static ikev2_profile_t *
3131 ikev2_profile_index_by_name (u8 * name)
3133 ikev2_main_t *km = &ikev2_main;
3136 p = mhash_get (&km->profile_index_by_name, name);
3140 return pool_elt_at_index (km->profiles, p[0]);
3145 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3146 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3154 b0 = vlib_get_buffer (vm, bi0);
3155 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3156 udp0 = vlib_buffer_get_current (b0);
3157 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3158 ip40 = vlib_buffer_get_current (b0);
3161 ip40->ip_version_and_header_length = 0x45;
3163 ip40->fragment_id = 0;
3164 ip40->flags_and_fragment_offset = 0;
3166 ip40->protocol = IP_PROTOCOL_UDP;
3167 ip40->dst_address.as_u32 = dst->as_u32;
3168 ip40->src_address.as_u32 = src->as_u32;
3169 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3170 udp0->src_port = clib_host_to_net_u16 (src_port);
3171 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3173 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3174 ip40->length = clib_host_to_net_u16 (b0->current_length);
3175 ip40->checksum = ip4_header_checksum (ip40);
3177 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3178 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3180 /* send the request */
3181 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3182 to_next = vlib_frame_vector_args (f);
3185 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3190 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
3193 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3198 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
3199 *ike = vlib_buffer_get_current (b0);
3204 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3206 ikev2_main_t *km = &ikev2_main;
3209 EVP_PKEY_free (km->pkey);
3210 km->pkey = ikev2_load_key_file (file);
3211 if (km->pkey == NULL)
3212 return clib_error_return (0, "load key '%s' failed", file);
3217 static_always_inline vnet_api_error_t
3218 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3220 ikev2_main_t *km = &ikev2_main;
3221 udp_dst_port_info_t *pi;
3223 uword *v = hash_get (km->udp_ports, port);
3224 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3228 /* IKE already uses this port, only increment reference counter */
3235 return VNET_API_ERROR_UDP_PORT_TAKEN;
3237 udp_register_dst_port (km->vlib_main, port,
3238 ipsec4_tun_input_node.index, 1);
3239 hash_set (km->udp_ports, port, 1);
3241 p->ipsec_over_udp_port = port;
3245 static_always_inline void
3246 ikev2_unregister_udp_port (ikev2_profile_t * p)
3248 ikev2_main_t *km = &ikev2_main;
3251 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3254 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3262 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3263 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3266 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3270 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3271 ikev2_main_per_thread_data_t * tkm,
3274 ikev2_main_t *km = &ikev2_main;
3275 ip4_address_t *src, *dst;
3277 /* Create the Initiator notification for IKE SA removal */
3282 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3285 ikev2_log_error ("buffer alloc failure");
3289 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3290 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3291 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3292 vec_resize (sa->del, 1);
3293 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3294 sa->del->spi = sa->ispi;
3295 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3296 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3297 len = ikev2_generate_message (sa, ike0, 0, 0);
3299 if (sa->is_initiator)
3310 ikev2_send_ike (vm, src, dst, bi0, len,
3311 ikev2_get_port (sa), sa->dst_port, 0);
3313 /* delete local SA */
3314 ikev2_child_sa_t *c;
3315 vec_foreach (c, sa->childs)
3316 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3318 u64 rspi = sa->rspi;
3319 ikev2_sa_free_all_vec (sa);
3320 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3323 hash_unset (tkm->sa_by_rspi, rspi);
3324 pool_put (tkm->sas, sa);
3329 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3331 ikev2_main_per_thread_data_t *tkm;
3333 u32 pi = p - km->profiles;
3337 vec_foreach (tkm, km->per_thread_data)
3340 pool_foreach (sa, tkm->sas, ({
3341 if (sa->profile_index != ~0 && pi == sa->profile_index)
3342 vec_add1 (del_sai, sa - tkm->sas);
3346 vec_foreach (sai, del_sai)
3348 sa = pool_elt_at_index (tkm->sas, sai[0]);
3349 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3352 vec_reset_length (del_sai);
3359 ikev2_profile_free (ikev2_profile_t * p)
3363 vec_free (p->auth.data);
3365 EVP_PKEY_free (p->auth.key);
3367 vec_free (p->loc_id.data);
3368 vec_free (p->rem_id.data);
3372 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3374 ikev2_main_t *km = &ikev2_main;
3379 if (ikev2_profile_index_by_name (name))
3380 return clib_error_return (0, "policy %v already exists", name);
3382 pool_get (km->profiles, p);
3383 clib_memset (p, 0, sizeof (*p));
3384 p->name = vec_dup (name);
3385 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3386 p->responder.sw_if_index = ~0;
3388 uword index = p - km->profiles;
3389 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3393 p = ikev2_profile_index_by_name (name);
3395 return clib_error_return (0, "policy %v does not exists", name);
3397 ikev2_unregister_udp_port (p);
3398 ikev2_cleanup_profile_sessions (km, p);
3400 ikev2_profile_free (p);
3401 pool_put (km->profiles, p);
3402 mhash_unset (&km->profile_index_by_name, name, 0);
3408 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3409 u8 * auth_data, u8 data_hex_format)
3414 p = ikev2_profile_index_by_name (name);
3418 r = clib_error_return (0, "unknown profile %v", name);
3423 EVP_PKEY_free (p->auth.key);
3424 vec_free (p->auth.data);
3426 p->auth.method = auth_method;
3427 p->auth.data = vec_dup (auth_data);
3428 p->auth.hex = data_hex_format;
3430 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3432 vec_add1 (p->auth.data, 0);
3433 p->auth.key = ikev2_load_cert_file (p->auth.data);
3434 if (p->auth.key == NULL)
3435 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3442 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3448 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3449 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3451 r = clib_error_return (0, "unsupported identity type %U",
3452 format_ikev2_id_type, id_type);
3456 p = ikev2_profile_index_by_name (name);
3460 r = clib_error_return (0, "unknown profile %v", name);
3466 vec_free (p->loc_id.data);
3467 p->loc_id.type = id_type;
3468 p->loc_id.data = vec_dup (data);
3472 vec_free (p->rem_id.data);
3473 p->rem_id.type = id_type;
3474 p->rem_id.data = vec_dup (data);
3481 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3482 u16 start_port, u16 end_port, ip4_address_t start_addr,
3483 ip4_address_t end_addr, int is_local)
3488 p = ikev2_profile_index_by_name (name);
3492 r = clib_error_return (0, "unknown profile %v", name);
3498 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3499 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3500 p->loc_ts.start_port = start_port;
3501 p->loc_ts.end_port = end_port;
3502 p->loc_ts.protocol_id = protocol_id;
3503 p->loc_ts.ts_type = 7;
3507 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3508 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3509 p->rem_ts.start_port = start_port;
3510 p->rem_ts.end_port = end_port;
3511 p->rem_ts.protocol_id = protocol_id;
3512 p->rem_ts.ts_type = 7;
3520 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3521 u32 sw_if_index, ip4_address_t ip4)
3526 p = ikev2_profile_index_by_name (name);
3530 r = clib_error_return (0, "unknown profile %v", name);
3534 p->responder.sw_if_index = sw_if_index;
3535 p->responder.ip4 = ip4;
3541 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3542 ikev2_transform_encr_type_t crypto_alg,
3543 ikev2_transform_integ_type_t integ_alg,
3544 ikev2_transform_dh_type_t dh_type,
3545 u32 crypto_key_size)
3550 p = ikev2_profile_index_by_name (name);
3554 r = clib_error_return (0, "unknown profile %v", name);
3558 p->ike_ts.crypto_alg = crypto_alg;
3559 p->ike_ts.integ_alg = integ_alg;
3560 p->ike_ts.dh_type = dh_type;
3561 p->ike_ts.crypto_key_size = crypto_key_size;
3566 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3567 ikev2_transform_encr_type_t crypto_alg,
3568 ikev2_transform_integ_type_t integ_alg,
3569 u32 crypto_key_size)
3574 p = ikev2_profile_index_by_name (name);
3578 r = clib_error_return (0, "unknown profile %v", name);
3582 p->esp_ts.crypto_alg = crypto_alg;
3583 p->esp_ts.integ_alg = integ_alg;
3584 p->esp_ts.crypto_key_size = crypto_key_size;
3589 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3590 u8 * name, u32 sw_if_index)
3595 p = ikev2_profile_index_by_name (name);
3599 r = clib_error_return (0, "unknown profile %v", name);
3603 p->tun_itf = sw_if_index;
3609 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3612 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3613 ikev2_main_t *km = &ikev2_main;
3614 vnet_api_error_t rv = 0;
3618 return VNET_API_ERROR_INVALID_VALUE;
3622 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3623 return VNET_API_ERROR_VALUE_EXIST;
3625 rv = ikev2_register_udp_port (p, port);
3629 v = hash_get (km->udp_ports, port);
3631 return VNET_API_ERROR_IKE_NO_PORT;
3633 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3634 return VNET_API_ERROR_INVALID_VALUE;
3636 ikev2_unregister_udp_port (p);
3642 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3644 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3649 r = clib_error_return (0, "unknown profile %v", name);
3658 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3659 u64 lifetime, u32 jitter, u32 handover,
3665 p = ikev2_profile_index_by_name (name);
3669 r = clib_error_return (0, "unknown profile %v", name);
3673 p->lifetime = lifetime;
3674 p->lifetime_jitter = jitter;
3675 p->handover = handover;
3676 p->lifetime_maxdata = maxdata;
3681 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3685 ip4_main_t *im = &ip4_main;
3686 ikev2_main_t *km = &ikev2_main;
3688 p = ikev2_profile_index_by_name (name);
3692 r = clib_error_return (0, "unknown profile %v", name);
3696 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3698 r = clib_error_return (0, "responder not set for profile %v", name);
3703 /* Create the Initiator Request */
3707 ip_lookup_main_t *lm = &im->lookup_main;
3709 int len = sizeof (ike_header_t);
3711 /* Get own iface IP */
3713 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3714 ip_interface_address_t *if_add =
3715 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3716 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3718 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3721 char *errmsg = "buffer alloc failure";
3722 ikev2_log_error (errmsg);
3723 return clib_error_return (0, errmsg);
3726 /* Prepare the SA and the IKE payload */
3728 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3729 ikev2_payload_chain_t *chain = 0;
3730 ikev2_payload_new_chain (chain);
3732 /* Build the IKE proposal payload */
3733 ikev2_sa_proposal_t *proposals = 0;
3734 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3735 proposals[0].proposal_num = 1;
3736 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3738 /* Add and then cleanup proposal data */
3739 ikev2_payload_add_sa (chain, proposals);
3740 ikev2_sa_free_proposal_vector (&proposals);
3742 sa.is_initiator = 1;
3743 sa.profile_index = p - km->profiles;
3744 sa.state = IKEV2_STATE_SA_INIT;
3745 sa.tun_itf = p->tun_itf;
3746 sa.udp_encap = p->udp_encap;
3747 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3748 sa.is_tun_itf_set = 1;
3749 sa.initial_contact = 1;
3750 sa.dst_port = IKEV2_PORT;
3751 ikev2_generate_sa_init_data (&sa);
3752 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3753 ikev2_payload_add_nonce (chain, sa.i_nonce);
3755 /* Build the child SA proposal */
3756 vec_resize (sa.childs, 1);
3757 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3758 &sa.childs[0].i_proposals, 0);
3759 sa.childs[0].i_proposals[0].proposal_num = 1;
3760 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3761 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3762 sizeof (sa.childs[0].i_proposals[0].spi));
3764 /* Add NAT detection notification messages (mandatory) */
3765 u8 *nat_detection_sha1 =
3766 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3767 clib_host_to_net_u64 (sa.rspi),
3769 clib_host_to_net_u16 (IKEV2_PORT));
3771 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3772 nat_detection_sha1);
3773 vec_free (nat_detection_sha1);
3774 nat_detection_sha1 =
3775 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3776 clib_host_to_net_u64 (sa.rspi),
3777 p->responder.ip4.as_u32,
3778 clib_host_to_net_u16 (sa.dst_port));
3779 ikev2_payload_add_notify (chain,
3780 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3781 nat_detection_sha1);
3782 vec_free (nat_detection_sha1);
3784 u8 *sig_hash_algo = vec_new (u8, 8);
3785 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3786 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3787 ikev2_payload_add_notify (chain,
3788 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3790 vec_free (sig_hash_algo);
3793 /* Buffer update and boilerplate */
3794 len += vec_len (chain->data);
3795 ike0->nextpayload = chain->first_payload_type;
3796 ike0->length = clib_host_to_net_u32 (len);
3797 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3798 ikev2_payload_destroy_chain (chain);
3800 ike0->version = IKE_VERSION_2;
3801 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3802 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3803 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
3807 /* store whole IKE payload - needed for PSK auth */
3808 vec_reset_length (sa.last_sa_init_req_packet_data);
3809 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3811 /* add data to the SA then add it to the pool */
3812 sa.iaddr.as_u32 = if_ip->as_u32;
3813 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3814 sa.i_id.type = p->loc_id.type;
3815 sa.i_id.data = vec_dup (p->loc_id.data);
3816 sa.r_id.type = p->rem_id.type;
3817 sa.r_id.data = vec_dup (p->rem_id.data);
3818 sa.i_auth.method = p->auth.method;
3819 sa.i_auth.hex = p->auth.hex;
3820 sa.i_auth.data = vec_dup (p->auth.data);
3821 sa.sw_if_index = p->responder.sw_if_index;
3822 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3823 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3825 ikev2_initial_contact_cleanup (&sa);
3827 /* add SA to the pool */
3828 ikev2_sa_t *sa0 = 0;
3829 pool_get (km->sais, sa0);
3830 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3831 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3833 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3834 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3836 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3837 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3838 p->responder.ip4.as_u32);
3845 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3846 ikev2_child_sa_t * csa)
3848 /* Create the Initiator notification for child SA removal */
3849 ikev2_main_t *km = &ikev2_main;
3854 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3857 ikev2_log_error ("buffer alloc failure");
3861 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3862 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3863 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3864 vec_resize (sa->del, 1);
3865 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3866 sa->del->spi = csa->i_proposals->spi;
3867 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3868 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3869 len = ikev2_generate_message (sa, ike0, 0, 0);
3871 len = ikev2_insert_non_esp_marker (ike0, len);
3872 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3873 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
3875 /* delete local child SA */
3876 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3877 ikev2_sa_del_child_sa (sa, csa);
3881 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3884 ikev2_main_t *km = &ikev2_main;
3885 ikev2_main_per_thread_data_t *tkm;
3886 ikev2_sa_t *fsa = 0;
3887 ikev2_child_sa_t *fchild = 0;
3889 /* Search for the child SA */
3890 vec_foreach (tkm, km->per_thread_data)
3896 pool_foreach (sa, tkm->sas, ({
3897 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3907 if (!fchild || !fsa)
3909 r = clib_error_return (0, "Child SA not found");
3914 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3921 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3924 ikev2_main_t *km = &ikev2_main;
3925 ikev2_main_per_thread_data_t *tkm;
3926 ikev2_sa_t *fsa = 0;
3927 ikev2_main_per_thread_data_t *ftkm = 0;
3929 /* Search for the IKE SA */
3930 vec_foreach (tkm, km->per_thread_data)
3936 pool_foreach (sa, tkm->sas, ({
3937 if (sa->ispi == ispi)
3949 r = clib_error_return (0, "IKE SA not found");
3953 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
3958 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3959 ikev2_child_sa_t * csa)
3961 /* Create the Initiator request for create child SA */
3966 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3969 ikev2_log_error ("buffer alloc failure");
3973 ike0->version = IKE_VERSION_2;
3974 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3975 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3976 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3977 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3978 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3979 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3981 ikev2_rekey_t *rekey;
3982 vec_add2 (sa->rekey, rekey, 1);
3983 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3986 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3987 rekey->spi = proposals[0].spi;
3988 rekey->ispi = csa->i_proposals->spi;
3989 len = ikev2_generate_message (sa, ike0, proposals, 0);
3991 len = ikev2_insert_non_esp_marker (ike0, len);
3992 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
3993 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
3994 vec_free (proposals);
3998 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4001 ikev2_main_t *km = &ikev2_main;
4002 ikev2_main_per_thread_data_t *tkm;
4003 ikev2_sa_t *fsa = 0;
4004 ikev2_child_sa_t *fchild = 0;
4006 /* Search for the child SA */
4007 vec_foreach (tkm, km->per_thread_data)
4013 pool_foreach (sa, tkm->sas, ({
4014 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4024 if (!fchild || !fsa)
4026 r = clib_error_return (0, "Child SA not found");
4031 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4038 ikev2_init (vlib_main_t * vm)
4040 ikev2_main_t *km = &ikev2_main;
4041 vlib_thread_main_t *tm = vlib_get_thread_main ();
4044 clib_memset (km, 0, sizeof (ikev2_main_t));
4045 km->vnet_main = vnet_get_main ();
4048 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4049 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4050 ikev2_crypto_init (km);
4052 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4054 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4055 CLIB_CACHE_LINE_BYTES);
4056 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4058 ikev2_main_per_thread_data_t *ptd =
4059 vec_elt_at_index (km->per_thread_data, thread_id);
4061 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4063 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4064 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4065 ptd->hmac_ctx = HMAC_CTX_new ();
4067 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4068 ptd->evp_ctx = &ptd->_evp_ctx;
4069 HMAC_CTX_init (&(ptd->_hmac_ctx));
4070 ptd->hmac_ctx = &ptd->_hmac_ctx;
4074 km->sa_by_ispi = hash_create (0, sizeof (uword));
4075 km->sw_if_indices = hash_create (0, 0);
4076 km->udp_ports = hash_create (0, sizeof (uword));
4078 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4079 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4081 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4082 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4084 ikev2_cli_reference ();
4086 km->log_level = IKEV2_LOG_ERROR;
4087 km->log_class = vlib_log_register_class ("ikev2", 0);
4092 VLIB_INIT_FUNCTION (ikev2_init) =
4094 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4099 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4102 ikev2_main_t *km = &ikev2_main;
4103 ikev2_profile_t *p = 0;
4104 vlib_main_t *vm = km->vlib_main;
4105 f64 now = vlib_time_now (vm);
4108 if (sa->profile_index != ~0)
4109 p = pool_elt_at_index (km->profiles, sa->profile_index);
4111 if (sa->is_initiator && p && csa->time_to_expiration
4112 && now > csa->time_to_expiration)
4114 if (!csa->is_expired || csa->rekey_retries > 0)
4116 ikev2_rekey_child_sa_internal (vm, sa, csa);
4117 csa->time_to_expiration = now + p->handover;
4118 csa->is_expired = 1;
4119 if (csa->rekey_retries == 0)
4121 csa->rekey_retries = 5;
4123 else if (csa->rekey_retries > 0)
4125 csa->rekey_retries--;
4126 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4127 csa->i_proposals->spi, csa->rekey_retries);
4128 if (csa->rekey_retries == 0)
4130 csa->rekey_retries = -1;
4137 csa->time_to_expiration = 0;
4138 ikev2_delete_child_sa_internal (vm, sa, csa);
4146 ipip_tunnel_t *ipip = NULL;
4147 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4148 if (~0 == sw_if_index)
4150 ip46_address_t local_ip;
4151 ip46_address_t remote_ip;
4152 if (sa->is_initiator)
4154 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4155 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4159 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4160 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4164 ipip_tunnel_key_t key = {
4167 .transport = IPIP_TRANSPORT_IP4,
4172 ipip = ipip_tunnel_db_find (&key);
4175 sw_if_index = ipip->sw_if_index;
4181 vec_add1 (sas_in, csa->remote_sa_id);
4182 vlib_worker_thread_barrier_sync (vm);
4183 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4184 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4185 vlib_worker_thread_barrier_release (vm);
4192 ikev2_set_log_level (ikev2_log_level_t log_level)
4194 ikev2_main_t *km = &ikev2_main;
4196 if (log_level >= IKEV2_LOG_MAX)
4198 ikev2_log_error ("unknown logging level %d", log_level);
4202 km->log_level = log_level;
4207 ikev2_set_liveness_params (u32 period, u32 max_retries)
4209 ikev2_main_t *km = &ikev2_main;
4211 if (period == 0 || max_retries == 0)
4212 return clib_error_return (0, "invalid args");
4214 km->liveness_period = period;
4215 km->liveness_max_retries = max_retries;
4220 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4222 ikev2_main_t *km = &ikev2_main;
4223 vlib_main_t *vm = km->vlib_main;
4224 ikev2_main_per_thread_data_t *tkm;
4225 ikev2_sa_t *fsa = 0;
4226 ikev2_profile_t *p = 0;
4227 ikev2_child_sa_t *fchild = 0;
4228 f64 now = vlib_time_now (vm);
4229 vlib_counter_t counts;
4231 /* Search for the SA and child SA */
4232 vec_foreach (tkm, km->per_thread_data)
4238 pool_foreach (sa, tkm->sas, ({
4239 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4248 vlib_get_combined_counter (&ipsec_sa_counters,
4249 ipsec_sa->stat_index, &counts);
4251 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4252 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4254 if (fchild && p && p->lifetime_maxdata)
4256 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4258 fchild->time_to_expiration = now;
4264 ikev2_process_pending_sa_init (ikev2_main_t * km)
4271 hash_foreach (ispi, sai, km->sa_by_ispi,
4273 sa = pool_elt_at_index (km->sais, sai);
4274 if (sa->init_response_received)
4278 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4281 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4282 clib_memcpy_fast (vlib_buffer_get_current (b),
4283 sa->last_sa_init_req_packet_data,
4284 vec_len (sa->last_sa_init_req_packet_data));
4285 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4286 vec_len (sa->last_sa_init_req_packet_data),
4287 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4292 static vlib_node_registration_t ikev2_mngr_process_node;
4295 ikev2_send_informational_request (ikev2_sa_t * sa)
4297 ikev2_main_t *km = &ikev2_main;
4298 ip4_address_t *src, *dst;
4304 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0);
4307 ikev2_log_error ("buffer alloc failure");
4311 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4312 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4313 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4314 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4315 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4316 len = ikev2_generate_message (sa, ike0, 0, 0);
4318 len = ikev2_insert_non_esp_marker (ike0, len);
4320 if (sa->is_initiator)
4331 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4332 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4336 static_always_inline int
4337 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4339 ikev2_main_t *km = &ikev2_main;
4340 vlib_main_t *vm = km->vlib_main;
4342 if (!sa->keys_generated)
4345 if (sa->liveness_retries >= km->liveness_max_retries)
4348 f64 now = vlib_time_now (vm);
4350 if (sa->liveness_period_check < now)
4352 sa->liveness_retries++;
4353 sa->liveness_period_check = now + km->liveness_period;
4354 ikev2_send_informational_request (sa);
4360 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4363 ikev2_main_t *km = &ikev2_main;
4364 ipsec_main_t *im = &ipsec_main;
4366 ikev2_child_sa_t *c;
4372 vlib_process_wait_for_event_or_clock (vm, 1);
4373 vlib_process_get_events (vm, NULL);
4375 /* process ike child sas */
4376 ikev2_main_per_thread_data_t *tkm;
4377 vec_foreach (tkm, km->per_thread_data)
4380 u32 *to_be_deleted = 0;
4383 pool_foreach (sa, tkm->sas, ({
4384 ikev2_child_sa_t *c;
4386 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4388 sa->old_remote_id_present = 0;
4392 sa->old_id_expiration -= 1;
4394 vec_foreach (c, sa->childs)
4396 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4399 if (ikev2_mngr_process_responder_sas (sa))
4400 vec_add1 (to_be_deleted, sa - tkm->sas);
4404 vec_foreach (sai, to_be_deleted)
4406 sa = pool_elt_at_index (tkm->sas, sai[0]);
4407 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4408 vec_foreach (c, sa->childs)
4410 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4411 ikev2_sa_del_child_sa (sa, c);
4413 ikev2_sa_free_all_vec (sa);
4414 hash_unset (tkm->sa_by_rspi, sa->rspi);
4415 pool_put (tkm->sas, sa);
4419 p = pool_elt_at_index (km->profiles, sa->profile_index);
4422 ikev2_initiate_sa_init (vm, p->name);
4426 vec_free (to_be_deleted);
4429 /* process ipsec sas */
4432 pool_foreach (sa, im->sad, ({
4433 ikev2_mngr_process_ipsec_sa(sa);
4437 ikev2_process_pending_sa_init (km);
4441 vlib_process_wait_for_event_or_clock (vm, 5);
4442 vlib_process_get_events (vm, NULL);
4451 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4452 .function = ikev2_mngr_process_fn,
4453 .type = VLIB_NODE_TYPE_PROCESS,
4455 "ikev2-manager-process",
4458 VLIB_PLUGIN_REGISTER () = {
4459 .version = VPP_BUILD_VER,
4460 .description = "Internet Key Exchange (IKEv2) Protocol",
4465 * fd.io coding-style-patch-verification: ON
4468 * eval: (c-set-style "gnu")