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>
32 ikev2_main_t ikev2_main;
34 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
36 ikev2_child_sa_t * child);
38 #define ikev2_set_state(sa, v) do { \
40 clib_warning("sa state changed to " #v); \
50 format_ikev2_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
56 s = format (s, "ikev2: sw_if_index %d, next index %d",
57 t->sw_if_index, t->next_index);
61 static vlib_node_registration_t ikev2_node;
63 #define foreach_ikev2_error \
64 _(PROCESSED, "IKEv2 packets processed") \
65 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
66 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
67 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
68 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
69 _(NOT_IKEV2, "Non IKEv2 packets received")
73 #define _(sym,str) IKEV2_ERROR_##sym,
79 static char *ikev2_error_strings[] = {
80 #define _(sym,string) string,
87 IKEV2_NEXT_IP4_LOOKUP,
88 IKEV2_NEXT_ERROR_DROP,
92 static ikev2_sa_transform_t *
93 ikev2_find_transform_data (ikev2_sa_transform_t * t)
95 ikev2_main_t *km = &ikev2_main;
96 ikev2_sa_transform_t *td;
98 vec_foreach (td, km->supported_transforms)
100 if (td->type != t->type)
103 if (td->transform_id != t->transform_id)
106 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
108 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
109 || t->attrs[1] != 14)
112 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
120 static ikev2_sa_proposal_t *
121 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
122 ikev2_protocol_id_t prot_id)
124 ikev2_sa_proposal_t *rv = 0;
125 ikev2_sa_proposal_t *proposal;
126 ikev2_sa_transform_t *transform, *new_t;
127 u8 mandatory_bitmap, optional_bitmap;
129 if (prot_id == IKEV2_PROTOCOL_IKE)
131 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
132 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
133 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
134 optional_bitmap = mandatory_bitmap;
136 else if (prot_id == IKEV2_PROTOCOL_ESP)
138 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
139 (1 << IKEV2_TRANSFORM_TYPE_ESN);
140 optional_bitmap = mandatory_bitmap |
141 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
143 else if (prot_id == IKEV2_PROTOCOL_AH)
145 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
146 (1 << IKEV2_TRANSFORM_TYPE_ESN);
147 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
152 vec_add2 (rv, proposal, 1);
154 vec_foreach (proposal, proposals)
157 if (proposal->protocol_id != prot_id)
160 vec_foreach (transform, proposal->transforms)
162 if ((1 << transform->type) & bitmap)
165 if (ikev2_find_transform_data (transform))
167 bitmap |= 1 << transform->type;
168 vec_add2 (rv->transforms, new_t, 1);
169 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
170 new_t->attrs = vec_dup (transform->attrs);
174 clib_warning ("bitmap is %x mandatory is %x optional is %x",
175 bitmap, mandatory_bitmap, optional_bitmap);
177 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
178 (bitmap & ~optional_bitmap) == 0)
180 rv->proposal_num = proposal->proposal_num;
181 rv->protocol_id = proposal->protocol_id;
182 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
187 vec_free (rv->transforms);
196 ikev2_sa_transform_t *
197 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
198 ikev2_transform_type_t type)
200 ikev2_sa_transform_t *t;
205 vec_foreach (t, p->transforms)
208 return ikev2_find_transform_data (t);
214 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
218 vec_foreach (c, sa->childs)
220 ikev2_sa_proposal_t *proposal =
221 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
222 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
230 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
232 ikev2_sa_proposal_t *p;
233 ikev2_sa_transform_t *t;
240 vec_foreach (t, p->transforms)
244 vec_free (p->transforms);
250 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
252 ikev2_sa_free_proposal_vector (&c->r_proposals);
253 ikev2_sa_free_proposal_vector (&c->i_proposals);
263 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
266 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
272 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
274 ikev2_sa_free_child_sa (child);
275 vec_del1 (sa->childs, child - sa->childs);
279 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
281 vec_free (sa->i_nonce);
282 vec_free (sa->i_dh_data);
283 vec_free (sa->dh_shared_key);
284 vec_free (sa->dh_private_key);
286 ikev2_sa_free_proposal_vector (&sa->r_proposals);
287 ikev2_sa_free_proposal_vector (&sa->i_proposals);
290 vec_free (sa->sk_ai);
291 vec_free (sa->sk_ar);
292 vec_free (sa->sk_ei);
293 vec_free (sa->sk_er);
294 vec_free (sa->sk_pi);
295 vec_free (sa->sk_pr);
297 vec_free (sa->i_id.data);
298 vec_free (sa->i_auth.data);
299 vec_free (sa->r_id.data);
300 vec_free (sa->r_auth.data);
302 EVP_PKEY_free (sa->r_auth.key);
306 ikev2_sa_free_all_child_sa (&sa->childs);
310 ikev2_delete_sa (ikev2_sa_t * sa)
312 ikev2_main_t *km = &ikev2_main;
313 u32 thread_index = vlib_get_thread_index ();
316 ikev2_sa_free_all_vec (sa);
318 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
321 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
322 pool_put (km->per_thread_data[thread_index].sas, sa);
327 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
329 ikev2_sa_transform_t *t = 0, *t2;
330 ikev2_main_t *km = &ikev2_main;
332 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
337 /* check if received DH group is on our list of supported groups */
338 vec_foreach (t2, km->supported_transforms)
340 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
349 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
350 vec_len (sa->i_dh_data));
351 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
355 if (sa->is_initiator)
358 RAND_bytes ((u8 *) & sa->ispi, 8);
361 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
362 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
367 RAND_bytes ((u8 *) & sa->rspi, 8);
370 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
371 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
374 /* generate dh keys */
375 ikev2_generate_dh (sa, t);
380 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
382 ikev2_sa_transform_t *t = 0, *t2;
383 ikev2_main_t *km = &ikev2_main;
386 /*move some data to the new SA */
387 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
388 sa->i_nonce = _(sai->i_nonce);
389 sa->i_dh_data = _(sai->i_dh_data);
390 sa->dh_private_key = _(sai->dh_private_key);
391 sa->iaddr.as_u32 = sai->iaddr.as_u32;
392 sa->raddr.as_u32 = sai->raddr.as_u32;
393 sa->is_initiator = sai->is_initiator;
394 sa->i_id.type = sai->i_id.type;
395 sa->profile_index = sai->profile_index;
396 sa->is_profile_index_set = sai->is_profile_index_set;
397 sa->i_id.data = _(sai->i_id.data);
398 sa->i_auth.method = sai->i_auth.method;
399 sa->i_auth.hex = sai->i_auth.hex;
400 sa->i_auth.data = _(sai->i_auth.data);
401 sa->i_auth.key = _(sai->i_auth.key);
402 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
403 sa->childs = _(sai->childs);
407 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
412 /* check if received DH group is on our list of supported groups */
413 vec_foreach (t2, km->supported_transforms)
415 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
424 clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
425 vec_len (sa->i_dh_data));
426 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
431 /* generate dh keys */
432 ikev2_complete_dh (sa, t);
437 ikev2_calc_keys (ikev2_sa_t * sa)
440 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
443 u16 integ_key_len = 0;
444 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
446 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
448 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
450 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
453 integ_key_len = tr_integ->key_len;
455 vec_append (s, sa->i_nonce);
456 vec_append (s, sa->r_nonce);
457 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
459 /* Calculate S = Ni | Nr | SPIi | SPIr */
461 vec_add2 (s, tmp, 2 * sizeof (*spi));
463 spi[0] = clib_host_to_net_u64 (sa->ispi);
464 spi[1] = clib_host_to_net_u64 (sa->rspi);
466 /* calculate PRFplus */
468 int len = tr_prf->key_trunc + /* SK_d */
469 integ_key_len * 2 + /* SK_ai, SK_ar */
470 tr_encr->key_len * 2 + /* SK_ei, SK_er */
471 tr_prf->key_len * 2; /* SK_pi, SK_pr */
473 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
480 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
481 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
482 pos += tr_prf->key_trunc;
487 sa->sk_ai = vec_new (u8, integ_key_len);
488 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
489 pos += integ_key_len;
492 sa->sk_ar = vec_new (u8, integ_key_len);
493 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
494 pos += integ_key_len;
498 sa->sk_ei = vec_new (u8, tr_encr->key_len);
499 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
500 pos += tr_encr->key_len;
503 sa->sk_er = vec_new (u8, tr_encr->key_len);
504 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
505 pos += tr_encr->key_len;
508 sa->sk_pi = vec_new (u8, tr_prf->key_len);
509 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
510 pos += tr_prf->key_len;
513 sa->sk_pr = vec_new (u8, tr_prf->key_len);
514 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
515 pos += tr_prf->key_len;
521 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
524 u16 integ_key_len = 0;
527 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
529 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
531 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
533 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
536 integ_key_len = ctr_integ->key_len;
538 salt_len = sizeof (u32);
540 vec_append (s, sa->i_nonce);
541 vec_append (s, sa->r_nonce);
542 /* calculate PRFplus */
544 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
546 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
551 child->sk_ei = vec_new (u8, ctr_encr->key_len);
552 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
553 pos += ctr_encr->key_len;
558 child->sk_ai = vec_new (u8, ctr_integ->key_len);
559 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
560 pos += ctr_integ->key_len;
564 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
569 child->sk_er = vec_new (u8, ctr_encr->key_len);
570 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
571 pos += ctr_encr->key_len;
576 child->sk_ar = vec_new (u8, integ_key_len);
577 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
578 pos += integ_key_len;
582 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
592 ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
596 u32 len = clib_net_to_host_u32 (ike->length);
597 u8 payload = ike->nextpayload;
599 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
600 "exchange %x flags %x msgid %x length %u",
601 clib_net_to_host_u64 (ike->ispi),
602 clib_net_to_host_u64 (ike->rspi),
603 payload, ike->version,
604 ike->exchange, ike->flags,
605 clib_net_to_host_u32 (ike->msgid), len);
607 sa->ispi = clib_net_to_host_u64 (ike->ispi);
609 /* store whole IKE payload - needed for PSK auth */
610 vec_free (sa->last_sa_init_req_packet_data);
611 vec_add (sa->last_sa_init_req_packet_data, ike, len);
613 while (p < len && payload != IKEV2_PAYLOAD_NONE)
615 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
616 u32 plen = clib_net_to_host_u16 (ikep->length);
618 if (plen < sizeof (ike_payload_header_t))
621 if (payload == IKEV2_PAYLOAD_SA)
623 ikev2_sa_free_proposal_vector (&sa->i_proposals);
624 sa->i_proposals = ikev2_parse_sa_payload (ikep);
626 else if (payload == IKEV2_PAYLOAD_KE)
628 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
629 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
630 vec_free (sa->i_dh_data);
631 vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
633 else if (payload == IKEV2_PAYLOAD_NONCE)
635 vec_free (sa->i_nonce);
636 vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
638 else if (payload == IKEV2_PAYLOAD_NOTIFY)
640 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
643 else if (payload == IKEV2_PAYLOAD_VENDOR)
645 ikev2_parse_vendor_payload (ikep);
649 clib_warning ("unknown payload %u flags %x length %u", payload,
651 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
653 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
654 sa->unsupported_cp = payload;
659 payload = ikep->nextpayload;
663 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
667 ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
671 u32 len = clib_net_to_host_u32 (ike->length);
672 u8 payload = ike->nextpayload;
674 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
675 "exchange %x flags %x msgid %x length %u",
676 clib_net_to_host_u64 (ike->ispi),
677 clib_net_to_host_u64 (ike->rspi),
678 payload, ike->version,
679 ike->exchange, ike->flags,
680 clib_net_to_host_u32 (ike->msgid), len);
682 sa->ispi = clib_net_to_host_u64 (ike->ispi);
683 sa->rspi = clib_net_to_host_u64 (ike->rspi);
685 /* store whole IKE payload - needed for PSK auth */
686 vec_free (sa->last_sa_init_res_packet_data);
687 vec_add (sa->last_sa_init_res_packet_data, ike, len);
689 while (p < len && payload != IKEV2_PAYLOAD_NONE)
691 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
692 u32 plen = clib_net_to_host_u16 (ikep->length);
694 if (plen < sizeof (ike_payload_header_t))
697 if (payload == IKEV2_PAYLOAD_SA)
699 ikev2_sa_free_proposal_vector (&sa->r_proposals);
700 sa->r_proposals = ikev2_parse_sa_payload (ikep);
703 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
705 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
708 else if (payload == IKEV2_PAYLOAD_KE)
710 ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
711 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
712 vec_free (sa->r_dh_data);
713 vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
715 else if (payload == IKEV2_PAYLOAD_NONCE)
717 vec_free (sa->r_nonce);
718 vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
720 else if (payload == IKEV2_PAYLOAD_NOTIFY)
722 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
725 else if (payload == IKEV2_PAYLOAD_VENDOR)
727 ikev2_parse_vendor_payload (ikep);
731 clib_warning ("unknown payload %u flags %x length %u", payload,
733 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
735 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
736 sa->unsupported_cp = payload;
741 payload = ikep->nextpayload;
747 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
752 u32 len = clib_net_to_host_u32 (ike->length);
753 ike_payload_header_t *ikep = 0;
755 ikev2_sa_transform_t *tr_integ;
757 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
760 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
762 ikep = (ike_payload_header_t *) & ike->payload[p];
763 plen = clib_net_to_host_u16 (ikep->length);
765 if (plen < sizeof (*ikep))
768 if (*payload == IKEV2_PAYLOAD_SK)
770 clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
771 last_payload = *payload;
775 clib_warning ("unknown payload %u flags %x length %u", payload,
777 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
779 sa->unsupported_cp = *payload;
784 *payload = ikep->nextpayload;
788 if (last_payload != IKEV2_PAYLOAD_SK)
790 clib_warning ("Last payload must be SK");
795 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
796 (u8 *) ike, len - tr_integ->key_trunc);
798 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
800 if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
802 clib_warning ("message integrity check failed");
808 return ikev2_decrypt_data (sa, ikep->payload, plen);
812 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
814 ikev2_main_t *km = &ikev2_main;
818 u32 thread_index = vlib_get_thread_index ();
820 if (!sa->initial_contact)
823 /* find old IKE SAs with the same authenticated identity */
825 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
826 if (tmp->i_id.type != sa->i_id.type ||
827 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
828 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
831 if (sa->rspi != tmp->rspi)
832 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
836 for (i = 0; i < vec_len (delete); i++)
839 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
841 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
843 ikev2_delete_sa (tmp);
847 sa->initial_contact = 0;
851 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
853 ikev2_child_sa_t *first_child_sa;
855 u32 len = clib_net_to_host_u32 (ike->length);
856 u8 payload = ike->nextpayload;
859 ike_payload_header_t *ikep;
862 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
863 "exchange %x flags %x msgid %x length %u",
864 clib_net_to_host_u64 (ike->ispi),
865 clib_net_to_host_u64 (ike->rspi),
866 payload, ike->version,
867 ike->exchange, ike->flags,
868 clib_net_to_host_u32 (ike->msgid), len);
870 ikev2_calc_keys (sa);
872 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
876 if (sa->unsupported_cp)
877 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
878 goto cleanup_and_exit;
881 /* select or create 1st child SA */
882 if (sa->is_initiator)
884 first_child_sa = &sa->childs[0];
888 ikev2_sa_free_all_child_sa (&sa->childs);
889 vec_add2 (sa->childs, first_child_sa, 1);
893 /* process encrypted payload */
895 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
897 ikep = (ike_payload_header_t *) & plaintext[p];
898 plen = clib_net_to_host_u16 (ikep->length);
900 if (plen < sizeof (ike_payload_header_t))
901 goto cleanup_and_exit;
903 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
905 clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
906 if (sa->is_initiator)
908 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
909 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
913 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
914 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
917 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
919 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
921 sa->i_id.type = id->id_type;
922 vec_free (sa->i_id.data);
923 vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
925 clib_warning ("received payload IDi, len %u id_type %u",
926 plen - sizeof (*id), id->id_type);
928 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
930 ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
932 sa->r_id.type = id->id_type;
933 vec_free (sa->r_id.data);
934 vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
936 clib_warning ("received payload IDr len %u id_type %u",
937 plen - sizeof (*id), id->id_type);
939 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
941 ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
943 if (sa->is_initiator)
945 sa->r_auth.method = a->auth_method;
946 vec_free (sa->r_auth.data);
947 vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
951 sa->i_auth.method = a->auth_method;
952 vec_free (sa->i_auth.data);
953 vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
956 clib_warning ("received payload AUTH, len %u auth_type %u",
957 plen - sizeof (*a), a->auth_method);
959 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
961 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
962 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
964 sa->initial_contact = 1;
968 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
970 ikev2_parse_vendor_payload (ikep);
972 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
974 clib_warning ("received payload TSi, len %u",
975 plen - sizeof (*ikep));
977 vec_free (first_child_sa->tsi);
978 first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
980 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
982 clib_warning ("received payload TSr, len %u",
983 plen - sizeof (*ikep));
985 vec_free (first_child_sa->tsr);
986 first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
990 clib_warning ("unknown payload %u flags %x length %u data %u",
991 payload, ikep->flags, plen - 4,
992 format_hex_bytes, ikep->payload, plen - 4);
994 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
996 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
997 sa->unsupported_cp = payload;
1002 payload = ikep->nextpayload;
1007 vec_free (plaintext);
1011 ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
1015 u32 len = clib_net_to_host_u32 (ike->length);
1016 u8 payload = ike->nextpayload;
1019 ike_payload_header_t *ikep;
1022 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1023 "exchange %x flags %x msgid %x length %u",
1024 clib_net_to_host_u64 (ike->ispi),
1025 clib_net_to_host_u64 (ike->rspi),
1026 payload, ike->version,
1027 ike->exchange, ike->flags,
1028 clib_net_to_host_u32 (ike->msgid), len);
1030 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1033 goto cleanup_and_exit;
1035 /* process encrypted payload */
1037 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1039 ikep = (ike_payload_header_t *) & plaintext[p];
1040 plen = clib_net_to_host_u16 (ikep->length);
1042 if (plen < sizeof (ike_payload_header_t))
1043 goto cleanup_and_exit;
1045 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1047 ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
1048 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1049 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1052 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1054 sa->del = ikev2_parse_delete_payload (ikep);
1056 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1058 ikev2_parse_vendor_payload (ikep);
1062 clib_warning ("unknown payload %u flags %x length %u data %u",
1063 payload, ikep->flags, plen - 4,
1064 format_hex_bytes, ikep->payload, plen - 4);
1066 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1068 sa->unsupported_cp = payload;
1073 payload = ikep->nextpayload;
1078 vec_free (plaintext);
1082 ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
1086 u32 len = clib_net_to_host_u32 (ike->length);
1087 u8 payload = ike->nextpayload;
1090 u8 nonce[IKEV2_NONCE_SIZE];
1092 ike_payload_header_t *ikep;
1094 ikev2_notify_t *n = 0;
1095 ikev2_ts_t *tsi = 0;
1096 ikev2_ts_t *tsr = 0;
1097 ikev2_sa_proposal_t *proposal = 0;
1098 ikev2_child_sa_t *child_sa;
1100 clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1101 "exchange %x flags %x msgid %x length %u",
1102 clib_net_to_host_u64 (ike->ispi),
1103 clib_net_to_host_u64 (ike->rspi),
1104 payload, ike->version,
1105 ike->exchange, ike->flags,
1106 clib_net_to_host_u32 (ike->msgid), len);
1108 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1111 goto cleanup_and_exit;
1113 /* process encrypted payload */
1115 while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1117 ikep = (ike_payload_header_t *) & plaintext[p];
1118 plen = clib_net_to_host_u16 (ikep->length);
1120 if (plen < sizeof (ike_payload_header_t))
1121 goto cleanup_and_exit;
1123 else if (payload == IKEV2_PAYLOAD_SA)
1125 proposal = ikev2_parse_sa_payload (ikep);
1127 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1129 n = ikev2_parse_notify_payload (ikep);
1130 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1135 else if (payload == IKEV2_PAYLOAD_DELETE)
1137 sa->del = ikev2_parse_delete_payload (ikep);
1139 else if (payload == IKEV2_PAYLOAD_VENDOR)
1141 ikev2_parse_vendor_payload (ikep);
1143 else if (payload == IKEV2_PAYLOAD_NONCE)
1145 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
1147 else if (payload == IKEV2_PAYLOAD_TSI)
1149 tsi = ikev2_parse_ts_payload (ikep);
1151 else if (payload == IKEV2_PAYLOAD_TSR)
1153 tsr = ikev2_parse_ts_payload (ikep);
1157 clib_warning ("unknown payload %u flags %x length %u data %u",
1158 payload, ikep->flags, plen - 4,
1159 format_hex_bytes, ikep->payload, plen - 4);
1161 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1163 sa->unsupported_cp = payload;
1168 payload = ikep->nextpayload;
1172 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1174 ikev2_rekey_t *rekey = &sa->rekey[0];
1175 rekey->protocol_id = proposal->protocol_id;
1177 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1178 rekey->i_proposal->spi = rekey->spi;
1179 rekey->r_proposal = proposal;
1183 vec_free (sa->r_nonce);
1184 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1185 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1188 child_sa->rekey_retries = 0;
1193 ikev2_rekey_t *rekey;
1194 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1197 clib_warning ("child SA spi %lx not found", n->spi);
1198 goto cleanup_and_exit;
1200 vec_add2 (sa->rekey, rekey, 1);
1201 rekey->protocol_id = n->protocol_id;
1202 rekey->spi = n->spi;
1203 rekey->i_proposal = proposal;
1205 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1209 vec_free (sa->i_nonce);
1210 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1211 /* generate new Nr */
1212 vec_free (sa->r_nonce);
1213 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
1214 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1218 vec_free (plaintext);
1223 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1231 ikev2_sa_transform_t *tr_prf;
1234 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1240 nonce = sa->i_nonce;
1241 packet_data = sa->last_sa_init_res_packet_data;
1247 nonce = sa->r_nonce;
1248 packet_data = sa->last_sa_init_req_packet_data;
1251 data = vec_new (u8, 4);
1253 vec_append (data, id->data);
1255 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1256 vec_append (authmsg, packet_data);
1257 vec_append (authmsg, nonce);
1258 vec_append (authmsg, id_hash);
1266 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1268 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1269 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1270 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1271 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1278 ikev2_sa_match_ts (ikev2_sa_t * sa)
1280 ikev2_main_t *km = &ikev2_main;
1282 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1286 pool_foreach (p, km->profiles, ({
1288 if (sa->is_initiator)
1302 if (p->rem_id.type != id->type ||
1303 vec_len(p->rem_id.data) != vec_len(id->data) ||
1304 memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1307 vec_foreach(ts, sa->childs[0].tsi)
1309 if (ikev2_ts_cmp(p_tsi, ts))
1311 vec_add1 (tsi, ts[0]);
1316 vec_foreach(ts, sa->childs[0].tsr)
1318 if (ikev2_ts_cmp(p_tsr, ts))
1320 vec_add1 (tsr, ts[0]);
1331 vec_free (sa->childs[0].tsi);
1332 vec_free (sa->childs[0].tsr);
1333 sa->childs[0].tsi = tsi;
1334 sa->childs[0].tsr = tsr;
1340 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1345 ikev2_sa_auth (ikev2_sa_t * sa)
1347 ikev2_main_t *km = &ikev2_main;
1348 ikev2_profile_t *p, *sel_p = 0;
1349 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1350 ikev2_sa_transform_t *tr_prf;
1353 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1355 /* only shared key and rsa signature */
1356 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1357 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1359 clib_warning ("unsupported authentication method %u",
1361 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1365 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1366 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1369 ikev2_auth_t *sa_auth;
1371 if (sa->is_initiator)
1374 sa_auth = &sa->r_auth;
1379 sa_auth = &sa->i_auth;
1383 pool_foreach (p, km->profiles, ({
1386 if (p->rem_id.type != sa_id->type ||
1387 vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1388 memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1391 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1393 if (!p->auth.data ||
1394 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1397 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1398 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1400 if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1402 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1409 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1411 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1414 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1416 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1429 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1431 if (!sa->is_initiator)
1433 vec_free (sa->r_id.data);
1434 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1435 sa->r_id.type = sel_p->loc_id.type;
1437 /* generate our auth data */
1438 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1439 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1441 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1442 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1444 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1446 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1447 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1451 /* select transforms for 1st child sa */
1452 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1453 sa->childs[0].r_proposals =
1454 ikev2_select_proposal (sa->childs[0].i_proposals,
1455 IKEV2_PROTOCOL_ESP);
1460 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1468 ikev2_sa_auth_init (ikev2_sa_t * sa)
1470 ikev2_main_t *km = &ikev2_main;
1471 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1472 ikev2_sa_transform_t *tr_prf;
1475 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1477 /* only shared key and rsa signature */
1478 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1479 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1481 clib_warning ("unsupported authentication method %u",
1483 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1487 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1488 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1489 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1490 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1493 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1495 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1496 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1498 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1500 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1501 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1511 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1513 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1517 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1519 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1528 ipsec_sa_flags_t flags;
1531 ipsec_crypto_alg_t encr_type;
1532 ipsec_integ_alg_t integ_type;
1533 ip46_address_t local_ip;
1534 ip46_address_t remote_ip;
1535 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1536 } ikev2_add_ipsec_tunnel_args_t;
1539 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1544 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1545 &a->local_ip, &a->remote_ip, 0, 0, &sw_if_index);
1547 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1549 IPSEC_PROTOCOL_ESP, a->encr_type,
1550 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1551 a->flags, 0, a->salt_local, &a->local_ip,
1552 &a->remote_ip, NULL);
1553 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1554 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1555 a->integ_type, &a->rem_ikey,
1556 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1557 a->salt_remote, &a->remote_ip,
1558 &a->local_ip, NULL);
1561 vec_add1 (sas_in, a->remote_sa_id);
1562 rv |= ipsec_tun_protect_update (sw_if_index, a->local_sa_id, sas_in);
1566 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1569 ikev2_child_sa_t * child, u32 sa_index,
1572 ikev2_main_t *km = &ikev2_main;
1573 ipsec_crypto_alg_t encr_type;
1574 ipsec_integ_alg_t integ_type;
1575 ikev2_profile_t *p = 0;
1576 ikev2_sa_transform_t *tr;
1577 ikev2_sa_proposal_t *proposals;
1579 ikev2_add_ipsec_tunnel_args_t a;
1581 clib_memset (&a, 0, sizeof (a));
1583 if (!child->r_proposals)
1585 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1589 if (sa->is_initiator)
1591 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1592 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1593 proposals = child->i_proposals;
1594 a.local_spi = child->r_proposals[0].spi;
1595 a.remote_spi = child->i_proposals[0].spi;
1599 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1600 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1601 proposals = child->r_proposals;
1602 a.local_spi = child->i_proposals[0].spi;
1603 a.remote_spi = child->r_proposals[0].spi;
1606 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1608 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1609 if (tr && tr->esn_type)
1610 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1612 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1615 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1617 switch (tr->key_len)
1620 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1623 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1626 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1629 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1634 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1637 switch (tr->key_len)
1640 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1643 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1646 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1649 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1657 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1663 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1666 a.encr_type = encr_type;
1670 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1673 switch (tr->integ_type)
1675 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1676 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1678 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1679 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1681 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1682 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1684 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1685 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1688 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1694 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1700 integ_type = IPSEC_INTEG_ALG_NONE;
1703 a.integ_type = integ_type;
1704 ikev2_calc_child_keys (sa, child);
1706 if (sa->is_initiator)
1708 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1709 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1710 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1711 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1714 a.salt_remote = child->salt_er;
1715 a.salt_local = child->salt_ei;
1720 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1721 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1722 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1723 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1726 a.salt_remote = child->salt_ei;
1727 a.salt_local = child->salt_er;
1731 if (sa->is_profile_index_set)
1732 p = pool_elt_at_index (km->profiles, sa->profile_index);
1734 if (p && p->lifetime)
1736 child->time_to_expiration =
1737 vlib_time_now (vnm->vlib_main) + p->lifetime;
1738 if (p->lifetime_jitter)
1740 // This is not much better than rand(3), which Coverity warns
1741 // is unsuitable for security applications; random_u32 is
1742 // however fast. If this perturbance to the expiration time
1743 // needs to use a better RNG then we may need to use something
1744 // like /dev/urandom which has significant overhead.
1745 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1746 rnd = random_u32 (&rnd);
1748 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1752 if (thread_index & 0xffffffc0)
1753 clib_warning ("error: thread index exceeds max range 0x3f!");
1755 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1756 clib_warning ("error: sa/child index exceeds max range 0xfff!");
1758 child->local_sa_id =
1760 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1761 child->remote_sa_id =
1763 ikev2_mk_remote_sa_id (sa_index, child_index, thread_index);
1765 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1766 (u8 *) & a, sizeof (a));
1772 ip46_address_t local_ip;
1773 ip46_address_t remote_ip;
1776 } ikev2_del_ipsec_tunnel_args_t;
1779 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1782 ipip_tunnel_key_t key = {
1784 .dst = a->remote_ip,
1785 .transport = IPIP_TRANSPORT_IP4,
1788 ipip_tunnel_t *ipip;
1791 ipip = ipip_tunnel_db_find (&key);
1795 ipsec_tun_protect_del (ipip->sw_if_index);
1796 ipsec_sa_unlock_id (a->remote_sa_id);
1797 ipsec_sa_unlock_id (a->local_sa_id);
1798 ipip_del_tunnel (ipip->sw_if_index);
1803 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1804 ikev2_child_sa_t * child)
1806 ikev2_del_ipsec_tunnel_args_t a;
1808 clib_memset (&a, 0, sizeof (a));
1810 if (sa->is_initiator)
1812 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1813 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1817 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1818 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1821 a.remote_sa_id = child->remote_sa_id;
1822 a.local_sa_id = child->local_sa_id;
1824 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1830 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1833 ike_payload_header_t *ph;
1837 ikev2_sa_transform_t *tr_encr, *tr_integ;
1839 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1841 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1843 ikev2_payload_chain_t *chain = 0;
1844 ikev2_payload_new_chain (chain);
1846 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1848 if (sa->r_proposals == 0)
1850 ikev2_payload_add_notify (chain,
1851 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1852 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1854 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1856 u8 *data = vec_new (u8, 2);
1857 ikev2_sa_transform_t *tr_dh;
1859 ikev2_sa_get_td_for_type (sa->r_proposals,
1860 IKEV2_TRANSFORM_TYPE_DH);
1861 ASSERT (tr_dh && tr_dh->dh_type);
1863 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1864 data[1] = (tr_dh->dh_type) & 0xff;
1866 ikev2_payload_add_notify (chain,
1867 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1870 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1872 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1874 u8 *data = vec_new (u8, 1);
1876 data[0] = sa->unsupported_cp;
1877 ikev2_payload_add_notify (chain,
1878 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1884 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1885 ikev2_payload_add_sa (chain, sa->r_proposals);
1886 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1887 ikev2_payload_add_nonce (chain, sa->r_nonce);
1890 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1892 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1894 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1895 ikev2_payload_add_auth (chain, &sa->r_auth);
1896 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1897 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1898 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1900 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1902 ikev2_payload_add_notify (chain,
1903 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1905 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1907 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1909 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1911 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1912 ikev2_payload_add_auth (chain, &sa->r_auth);
1914 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1916 ikev2_payload_add_notify (chain,
1917 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1918 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1919 ikev2_payload_add_auth (chain, &sa->r_auth);
1920 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1921 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1923 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1925 u8 *data = vec_new (u8, 1);
1927 data[0] = sa->unsupported_cp;
1928 ikev2_payload_add_notify (chain,
1929 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1933 else if (sa->state == IKEV2_STATE_SA_INIT)
1935 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1936 ikev2_payload_add_auth (chain, &sa->i_auth);
1937 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1938 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1939 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1943 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1947 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1949 /* if pending delete */
1952 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1954 if (sa->is_initiator)
1955 ikev2_payload_add_delete (chain, sa->del);
1957 /* The response to a request that deletes the IKE SA is an empty
1958 INFORMATIONAL response. */
1959 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1961 /* The response to a request that deletes ESP or AH SAs will contain
1962 delete payloads for the paired SAs going in the other direction. */
1965 ikev2_payload_add_delete (chain, sa->del);
1970 /* received N(AUTHENTICATION_FAILED) */
1971 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1973 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1976 /* received unsupported critical payload */
1977 else if (sa->unsupported_cp)
1979 u8 *data = vec_new (u8, 1);
1981 data[0] = sa->unsupported_cp;
1982 ikev2_payload_add_notify (chain,
1983 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1986 sa->unsupported_cp = 0;
1988 /* else send empty response */
1990 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1992 if (sa->is_initiator)
1995 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1996 ikev2_notify_t notify;
1997 u8 *data = vec_new (u8, 4);
1998 clib_memset (¬ify, 0, sizeof (notify));
1999 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2000 notify.spi = sa->childs[0].i_proposals->spi;
2001 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2003 ikev2_payload_add_sa (chain, proposals);
2004 ikev2_payload_add_nonce (chain, sa->i_nonce);
2005 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2006 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2007 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2016 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2017 ikev2_payload_add_nonce (chain, sa->r_nonce);
2018 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2020 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2022 vec_del1 (sa->rekey, 0);
2024 else if (sa->unsupported_cp)
2026 u8 *data = vec_new (u8, 1);
2028 data[0] = sa->unsupported_cp;
2029 ikev2_payload_add_notify (chain,
2030 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2033 sa->unsupported_cp = 0;
2037 ikev2_payload_add_notify (chain,
2038 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2045 ike->version = IKE_VERSION_2;
2046 ike->nextpayload = IKEV2_PAYLOAD_SK;
2047 tlen = sizeof (*ike);
2048 if (sa->is_initiator)
2050 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2051 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2055 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2059 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2061 tlen += vec_len (chain->data);
2062 ike->nextpayload = chain->first_payload_type;
2063 ike->length = clib_host_to_net_u32 (tlen);
2064 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2066 /* store whole IKE payload - needed for PSK auth */
2067 vec_free (sa->last_sa_init_res_packet_data);
2068 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2073 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2076 plen = sizeof (*ph);
2077 ph = (ike_payload_header_t *) & ike->payload[0];
2078 ph->nextpayload = chain->first_payload_type;
2080 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2083 /* add space for hmac */
2084 plen += tr_integ->key_trunc;
2087 /* payload and total length */
2088 ph->length = clib_host_to_net_u16 (plen);
2089 ike->length = clib_host_to_net_u32 (tlen);
2091 /* calc integrity data for whole packet except hash itself */
2093 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2094 (u8 *) ike, tlen - tr_integ->key_trunc);
2096 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2097 sizeof (*ike), integ, tr_integ->key_trunc);
2099 /* store whole IKE payload - needed for retransmit */
2100 vec_free (sa->last_res_packet_data);
2101 vec_add (sa->last_res_packet_data, ike, tlen);
2105 ikev2_payload_destroy_chain (chain);
2111 ikev2_retransmit_sa_init (ike_header_t * ike,
2112 ip4_address_t iaddr, ip4_address_t raddr)
2114 ikev2_main_t *km = &ikev2_main;
2116 u32 thread_index = vlib_get_thread_index ();
2119 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2120 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2121 sa->iaddr.as_u32 == iaddr.as_u32 &&
2122 sa->raddr.as_u32 == raddr.as_u32)
2125 u32 len = clib_net_to_host_u32(ike->length);
2126 u8 payload = ike->nextpayload;
2128 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2129 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2130 u32 plen = clib_net_to_host_u16(ikep->length);
2132 if (plen < sizeof(ike_payload_header_t))
2135 if (payload == IKEV2_PAYLOAD_NONCE)
2137 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2139 /* req is retransmit */
2140 if (sa->state == IKEV2_STATE_SA_INIT)
2143 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2144 ike->ispi = tmp->ispi;
2145 ike->rspi = tmp->rspi;
2146 ike->nextpayload = tmp->nextpayload;
2147 ike->version = tmp->version;
2148 ike->exchange = tmp->exchange;
2149 ike->flags = tmp->flags;
2150 ike->msgid = tmp->msgid;
2151 ike->length = tmp->length;
2152 clib_memcpy_fast(ike->payload, tmp->payload,
2153 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2154 clib_warning("IKE_SA_INIT retransmit from %U to %U",
2155 format_ip4_address, &raddr,
2156 format_ip4_address, &iaddr);
2159 /* else ignore req */
2162 clib_warning("IKE_SA_INIT ignore from %U to %U",
2163 format_ip4_address, &raddr,
2164 format_ip4_address, &iaddr);
2169 payload = ikep->nextpayload;
2176 /* req is not retransmit */
2181 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2183 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2186 if (msg_id > sa->last_msg_id)
2188 sa->last_msg_id = msg_id;
2191 /* retransmitted req */
2192 else if (msg_id == sa->last_msg_id)
2195 tmp = (ike_header_t *) sa->last_res_packet_data;
2196 ike->ispi = tmp->ispi;
2197 ike->rspi = tmp->rspi;
2198 ike->nextpayload = tmp->nextpayload;
2199 ike->version = tmp->version;
2200 ike->exchange = tmp->exchange;
2201 ike->flags = tmp->flags;
2202 ike->msgid = tmp->msgid;
2203 ike->length = tmp->length;
2204 clib_memcpy_fast (ike->payload, tmp->payload,
2205 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2206 clib_warning ("IKE msgid %u retransmit from %U to %U",
2208 format_ip4_address, &sa->raddr,
2209 format_ip4_address, &sa->iaddr);
2212 /* old req ignore */
2215 clib_warning ("IKE msgid %u req ignore from %U to %U",
2217 format_ip4_address, &sa->raddr,
2218 format_ip4_address, &sa->iaddr);
2225 ikev2_node_fn (vlib_main_t * vm,
2226 vlib_node_runtime_t * node, vlib_frame_t * frame)
2228 u32 n_left_from, *from, *to_next;
2229 ikev2_next_t next_index;
2230 ikev2_main_t *km = &ikev2_main;
2231 u32 thread_index = vlib_get_thread_index ();
2233 from = vlib_frame_vector_args (frame);
2234 n_left_from = frame->n_vectors;
2235 next_index = node->cached_next_index;
2237 while (n_left_from > 0)
2241 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2243 while (n_left_from > 0 && n_left_to_next > 0)
2247 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2252 ikev2_sa_t *sa0 = 0;
2253 ikev2_sa_t sa; /* temporary store for SA */
2257 /* speculatively enqueue b0 to the current next frame */
2263 n_left_to_next -= 1;
2265 b0 = vlib_get_buffer (vm, bi0);
2266 ike0 = vlib_buffer_get_current (b0);
2267 vlib_buffer_advance (b0, -sizeof (*udp0));
2268 udp0 = vlib_buffer_get_current (b0);
2269 vlib_buffer_advance (b0, -sizeof (*ip40));
2270 ip40 = vlib_buffer_get_current (b0);
2272 if (ike0->version != IKE_VERSION_2)
2274 vlib_node_increment_counter (vm, ikev2_node.index,
2275 IKEV2_ERROR_NOT_IKEV2, 1);
2279 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2282 clib_memset (sa0, 0, sizeof (*sa0));
2284 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2286 if (ike0->rspi == 0)
2288 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2289 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2291 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2295 vlib_node_increment_counter (vm, ikev2_node.index,
2296 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2298 len = clib_net_to_host_u32 (ike0->length);
2303 vlib_node_increment_counter (vm, ikev2_node.index,
2304 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2309 ikev2_process_sa_init_req (vm, sa0, ike0);
2311 if (sa0->state == IKEV2_STATE_SA_INIT)
2313 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2315 ikev2_select_proposal (sa0->i_proposals,
2316 IKEV2_PROTOCOL_IKE);
2317 ikev2_generate_sa_init_data (sa0);
2320 if (sa0->state == IKEV2_STATE_SA_INIT
2321 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2323 len = ikev2_generate_message (sa0, ike0, 0);
2326 if (sa0->state == IKEV2_STATE_SA_INIT)
2328 /* add SA to the pool */
2329 pool_get (km->per_thread_data[thread_index].sas,
2331 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2333 per_thread_data[thread_index].sa_by_rspi,
2336 km->per_thread_data[thread_index].sas);
2340 ikev2_sa_free_all_vec (sa0);
2344 else //received sa_init without initiator flag
2346 ikev2_process_sa_init_resp (vm, sa0, ike0);
2348 if (sa0->state == IKEV2_STATE_SA_INIT)
2350 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2351 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2355 pool_elt_at_index (km->sais, p[0]);
2357 ikev2_complete_sa_data (sa0, sai);
2358 ikev2_calc_keys (sa0);
2359 ikev2_sa_auth_init (sa0);
2360 len = ikev2_generate_message (sa0, ike0, 0);
2364 if (sa0->state == IKEV2_STATE_SA_INIT)
2366 /* add SA to the pool */
2367 pool_get (km->per_thread_data[thread_index].sas, sa0);
2368 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2369 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2371 sa0 - km->per_thread_data[thread_index].sas);
2375 ikev2_sa_free_all_vec (sa0);
2379 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2382 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2383 clib_net_to_host_u64 (ike0->rspi));
2387 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2390 r = ikev2_retransmit_resp (sa0, ike0);
2393 vlib_node_increment_counter (vm, ikev2_node.index,
2394 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2396 len = clib_net_to_host_u32 (ike0->length);
2401 vlib_node_increment_counter (vm, ikev2_node.index,
2402 IKEV2_ERROR_IKE_REQ_IGNORE,
2407 ikev2_process_auth_req (vm, sa0, ike0);
2408 ikev2_sa_auth (sa0);
2409 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2411 ikev2_initial_contact_cleanup (sa0);
2412 ikev2_sa_match_ts (sa0);
2413 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2414 ikev2_create_tunnel_interface (km->vnet_main,
2420 if (sa0->is_initiator)
2422 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2426 pool_elt_at_index (km->sais, p[0]);
2427 hash_unset (km->sa_by_ispi, sai->ispi);
2428 ikev2_sa_free_all_vec (sai);
2429 pool_put (km->sais, sai);
2434 len = ikev2_generate_message (sa0, ike0, 0);
2438 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2441 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2442 clib_net_to_host_u64 (ike0->rspi));
2446 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2449 r = ikev2_retransmit_resp (sa0, ike0);
2452 vlib_node_increment_counter (vm, ikev2_node.index,
2453 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2455 len = clib_net_to_host_u32 (ike0->length);
2460 vlib_node_increment_counter (vm, ikev2_node.index,
2461 IKEV2_ERROR_IKE_REQ_IGNORE,
2466 ikev2_process_informational_req (vm, sa0, ike0);
2469 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2471 ikev2_delete_t *d, *tmp, *resp = 0;
2472 vec_foreach (d, sa0->del)
2474 ikev2_child_sa_t *ch_sa;
2475 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2477 !sa0->is_initiator);
2480 ikev2_delete_tunnel_interface (km->vnet_main,
2482 if (!sa0->is_initiator)
2484 vec_add2 (resp, tmp, 1);
2485 tmp->protocol_id = d->protocol_id;
2486 tmp->spi = ch_sa->r_proposals[0].spi;
2488 ikev2_sa_del_child_sa (sa0, ch_sa);
2491 if (!sa0->is_initiator)
2493 vec_free (sa0->del);
2498 if (!sa0->is_initiator)
2500 len = ikev2_generate_message (sa0, ike0, 0);
2504 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2507 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2508 clib_net_to_host_u64 (ike0->rspi));
2512 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2515 r = ikev2_retransmit_resp (sa0, ike0);
2518 vlib_node_increment_counter (vm, ikev2_node.index,
2519 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2521 len = clib_net_to_host_u32 (ike0->length);
2526 vlib_node_increment_counter (vm, ikev2_node.index,
2527 IKEV2_ERROR_IKE_REQ_IGNORE,
2532 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2535 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2537 ikev2_child_sa_t *child;
2538 vec_add2 (sa0->childs, child, 1);
2539 child->r_proposals = sa0->rekey[0].r_proposal;
2540 child->i_proposals = sa0->rekey[0].i_proposal;
2541 child->tsi = sa0->rekey[0].tsi;
2542 child->tsr = sa0->rekey[0].tsr;
2543 ikev2_create_tunnel_interface (km->vnet_main,
2546 child - sa0->childs);
2548 if (sa0->is_initiator)
2550 vec_del1 (sa0->rekey, 0);
2554 len = ikev2_generate_message (sa0, ike0, 0);
2561 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2563 format_ip4_address, ip40->src_address.as_u8,
2564 format_ip4_address, ip40->dst_address.as_u8);
2568 /* if we are sending packet back, rewrite headers */
2571 next0 = IKEV2_NEXT_IP4_LOOKUP;
2572 if (sa0->is_initiator)
2574 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2575 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2579 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2580 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2583 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2585 b0->current_length =
2586 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2587 ip40->length = clib_host_to_net_u16 (b0->current_length);
2588 ip40->checksum = ip4_header_checksum (ip40);
2591 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2592 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2594 ikev2_child_sa_t *c;
2596 vec_foreach (c, sa0->childs)
2597 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2599 ikev2_delete_sa (sa0);
2601 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2603 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2604 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2606 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2607 t->sw_if_index = sw_if_index0;
2608 t->next_index = next0;
2611 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2612 n_left_to_next, bi0, next0);
2615 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2618 vlib_node_increment_counter (vm, ikev2_node.index,
2619 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2620 return frame->n_vectors;
2624 VLIB_REGISTER_NODE (ikev2_node,static) = {
2625 .function = ikev2_node_fn,
2627 .vector_size = sizeof (u32),
2628 .format_trace = format_ikev2_trace,
2629 .type = VLIB_NODE_TYPE_INTERNAL,
2631 .n_errors = ARRAY_LEN(ikev2_error_strings),
2632 .error_strings = ikev2_error_strings,
2634 .n_next_nodes = IKEV2_N_NEXT,
2637 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2638 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2643 // set ikev2 proposals when vpp is used as initiator
2644 static clib_error_t *
2645 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2646 ikev2_transforms_set * ts,
2647 ikev2_sa_proposal_t ** proposals, int is_ike)
2650 ikev2_main_t *km = &ikev2_main;
2651 ikev2_sa_proposal_t *proposal;
2652 vec_add2 (*proposals, proposal, 1);
2653 ikev2_sa_transform_t *td;
2658 vec_foreach (td, km->supported_transforms)
2660 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2661 && td->encr_type == ts->crypto_alg
2662 && td->key_len == ts->crypto_key_size / 8)
2665 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2666 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2667 vec_add (td->attrs, (u8 *) attr, 4);
2668 vec_add1 (proposal->transforms, *td);
2677 r = clib_error_return (0, "Unsupported algorithm");
2683 vec_foreach (td, km->supported_transforms)
2685 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2686 && td->integ_type == ts->integ_alg)
2688 vec_add1 (proposal->transforms, *td);
2696 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2697 r = clib_error_return (0, "Unsupported algorithm");
2705 vec_foreach (td, km->supported_transforms)
2707 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2708 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2710 vec_add1 (proposal->transforms, *td);
2717 r = clib_error_return (0, "Unsupported algorithm");
2723 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2726 vec_foreach (td, km->supported_transforms)
2728 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2730 vec_add1 (proposal->transforms, *td);
2733 sa->dh_group = td->dh_type;
2741 r = clib_error_return (0, "Unsupported algorithm");
2749 vec_foreach (td, km->supported_transforms)
2751 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2753 vec_add1 (proposal->transforms, *td);
2760 r = clib_error_return (0, "Unsupported algorithm");
2769 static ikev2_profile_t *
2770 ikev2_profile_index_by_name (u8 * name)
2772 ikev2_main_t *km = &ikev2_main;
2775 p = mhash_get (&km->profile_index_by_name, name);
2779 return pool_elt_at_index (km->profiles, p[0]);
2784 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2793 b0 = vlib_get_buffer (vm, bi0);
2794 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2795 udp0 = vlib_buffer_get_current (b0);
2796 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2797 ip40 = vlib_buffer_get_current (b0);
2800 ip40->ip_version_and_header_length = 0x45;
2802 ip40->fragment_id = 0;
2803 ip40->flags_and_fragment_offset = 0;
2805 ip40->protocol = IP_PROTOCOL_UDP;
2806 ip40->dst_address.as_u32 = dst->as_u32;
2807 ip40->src_address.as_u32 = src->as_u32;
2808 udp0->dst_port = clib_host_to_net_u16 (500);
2809 udp0->src_port = clib_host_to_net_u16 (500);
2810 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2812 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2813 ip40->length = clib_host_to_net_u16 (b0->current_length);
2814 ip40->checksum = ip4_header_checksum (ip40);
2817 /* send the request */
2818 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2819 to_next = vlib_frame_vector_args (f);
2822 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2827 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2830 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2835 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2836 *ike = vlib_buffer_get_current (b0);
2841 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2843 ikev2_main_t *km = &ikev2_main;
2845 km->pkey = ikev2_load_key_file (file);
2846 if (km->pkey == NULL)
2847 return clib_error_return (0, "load key '%s' failed", file);
2853 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2855 ikev2_main_t *km = &ikev2_main;
2860 if (ikev2_profile_index_by_name (name))
2861 return clib_error_return (0, "policy %v already exists", name);
2863 pool_get (km->profiles, p);
2864 clib_memset (p, 0, sizeof (*p));
2865 p->name = vec_dup (name);
2866 p->responder.sw_if_index = ~0;
2867 uword index = p - km->profiles;
2868 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2872 p = ikev2_profile_index_by_name (name);
2874 return clib_error_return (0, "policy %v does not exists", name);
2877 pool_put (km->profiles, p);
2878 mhash_unset (&km->profile_index_by_name, name, 0);
2884 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2885 u8 * auth_data, u8 data_hex_format)
2890 p = ikev2_profile_index_by_name (name);
2894 r = clib_error_return (0, "unknown profile %v", name);
2897 vec_free (p->auth.data);
2898 p->auth.method = auth_method;
2899 p->auth.data = vec_dup (auth_data);
2900 p->auth.hex = data_hex_format;
2902 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2904 vec_add1 (p->auth.data, 0);
2906 EVP_PKEY_free (p->auth.key);
2907 p->auth.key = ikev2_load_cert_file (auth_data);
2908 if (p->auth.key == NULL)
2909 return clib_error_return (0, "load cert '%s' failed", auth_data);
2916 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2922 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2923 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2925 r = clib_error_return (0, "unsupported identity type %U",
2926 format_ikev2_id_type, id_type);
2930 p = ikev2_profile_index_by_name (name);
2934 r = clib_error_return (0, "unknown profile %v", name);
2940 vec_free (p->loc_id.data);
2941 p->loc_id.type = id_type;
2942 p->loc_id.data = vec_dup (data);
2946 vec_free (p->rem_id.data);
2947 p->rem_id.type = id_type;
2948 p->rem_id.data = vec_dup (data);
2955 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2956 u16 start_port, u16 end_port, ip4_address_t start_addr,
2957 ip4_address_t end_addr, int is_local)
2962 p = ikev2_profile_index_by_name (name);
2966 r = clib_error_return (0, "unknown profile %v", name);
2972 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2973 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2974 p->loc_ts.start_port = start_port;
2975 p->loc_ts.end_port = end_port;
2976 p->loc_ts.protocol_id = protocol_id;
2977 p->loc_ts.ts_type = 7;
2981 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2982 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2983 p->rem_ts.start_port = start_port;
2984 p->rem_ts.end_port = end_port;
2985 p->rem_ts.protocol_id = protocol_id;
2986 p->rem_ts.ts_type = 7;
2994 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
2995 u32 sw_if_index, ip4_address_t ip4)
3000 p = ikev2_profile_index_by_name (name);
3004 r = clib_error_return (0, "unknown profile %v", name);
3008 p->responder.sw_if_index = sw_if_index;
3009 p->responder.ip4 = ip4;
3015 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3016 ikev2_transform_encr_type_t crypto_alg,
3017 ikev2_transform_integ_type_t integ_alg,
3018 ikev2_transform_dh_type_t dh_type,
3019 u32 crypto_key_size)
3024 p = ikev2_profile_index_by_name (name);
3028 r = clib_error_return (0, "unknown profile %v", name);
3032 p->ike_ts.crypto_alg = crypto_alg;
3033 p->ike_ts.integ_alg = integ_alg;
3034 p->ike_ts.dh_type = dh_type;
3035 p->ike_ts.crypto_key_size = crypto_key_size;
3040 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3041 ikev2_transform_encr_type_t crypto_alg,
3042 ikev2_transform_integ_type_t integ_alg,
3043 ikev2_transform_dh_type_t dh_type,
3044 u32 crypto_key_size)
3049 p = ikev2_profile_index_by_name (name);
3053 r = clib_error_return (0, "unknown profile %v", name);
3057 p->esp_ts.crypto_alg = crypto_alg;
3058 p->esp_ts.integ_alg = integ_alg;
3059 p->esp_ts.dh_type = dh_type;
3060 p->esp_ts.crypto_key_size = crypto_key_size;
3065 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3066 u64 lifetime, u32 jitter, u32 handover,
3072 p = ikev2_profile_index_by_name (name);
3076 r = clib_error_return (0, "unknown profile %v", name);
3080 p->lifetime = lifetime;
3081 p->lifetime_jitter = jitter;
3082 p->handover = handover;
3083 p->lifetime_maxdata = maxdata;
3088 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3092 ip4_main_t *im = &ip4_main;
3093 ikev2_main_t *km = &ikev2_main;
3095 p = ikev2_profile_index_by_name (name);
3099 r = clib_error_return (0, "unknown profile %v", name);
3103 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3105 r = clib_error_return (0, "responder not set for profile %v", name);
3110 /* Create the Initiator Request */
3114 ip_lookup_main_t *lm = &im->lookup_main;
3116 int len = sizeof (ike_header_t);
3118 /* Get own iface IP */
3120 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3121 ip_interface_address_t *if_add =
3122 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3123 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3125 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3127 /* Prepare the SA and the IKE payload */
3129 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3130 ikev2_payload_chain_t *chain = 0;
3131 ikev2_payload_new_chain (chain);
3133 /* Build the IKE proposal payload */
3134 ikev2_sa_proposal_t *proposals = 0;
3135 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3136 proposals[0].proposal_num = 1;
3137 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3139 /* Add and then cleanup proposal data */
3140 ikev2_payload_add_sa (chain, proposals);
3141 ikev2_sa_free_proposal_vector (&proposals);
3143 sa.is_initiator = 1;
3144 sa.profile_index = km->profiles - p;
3145 sa.is_profile_index_set = 1;
3146 sa.state = IKEV2_STATE_SA_INIT;
3147 ikev2_generate_sa_init_data (&sa);
3148 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3149 ikev2_payload_add_nonce (chain, sa.i_nonce);
3151 /* Build the child SA proposal */
3152 vec_resize (sa.childs, 1);
3153 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3154 &sa.childs[0].i_proposals, 0);
3155 sa.childs[0].i_proposals[0].proposal_num = 1;
3156 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3157 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3158 sizeof (sa.childs[0].i_proposals[0].spi));
3162 /* Add NAT detection notification messages (mandatory) */
3163 u8 nat_detection_source[8 + 8 + 4 + 2];
3164 u8 *nat_detection_sha1 = vec_new (u8, 20);
3166 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3167 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3168 tmpspi = clib_host_to_net_u64 (sa.rspi);
3169 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3170 u16 tmpport = clib_host_to_net_u16 (500);
3171 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3173 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3174 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3175 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3176 nat_detection_sha1);
3177 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3178 nat_detection_sha1);
3179 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3180 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3181 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3182 nat_detection_sha1);
3183 ikev2_payload_add_notify (chain,
3184 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3185 nat_detection_sha1);
3186 vec_free (nat_detection_sha1);
3188 u8 *sig_hash_algo = vec_new (u8, 8);
3189 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3190 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3191 ikev2_payload_add_notify (chain,
3192 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3194 vec_free (sig_hash_algo);
3197 /* Buffer update and boilerplate */
3198 len += vec_len (chain->data);
3199 ike0->nextpayload = chain->first_payload_type;
3200 ike0->length = clib_host_to_net_u32 (len);
3201 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3202 ikev2_payload_destroy_chain (chain);
3204 ike0->version = IKE_VERSION_2;
3205 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3206 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3207 ike0->ispi = sa.ispi;
3211 /* store whole IKE payload - needed for PSK auth */
3212 vec_free (sa.last_sa_init_req_packet_data);
3213 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3215 /* add data to the SA then add it to the pool */
3216 sa.iaddr.as_u32 = if_ip->as_u32;
3217 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3218 sa.i_id.type = p->loc_id.type;
3219 sa.i_id.data = vec_dup (p->loc_id.data);
3220 sa.i_auth.method = p->auth.method;
3221 sa.i_auth.hex = p->auth.hex;
3222 sa.i_auth.data = vec_dup (p->auth.data);
3223 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3224 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3226 /* add SA to the pool */
3227 ikev2_sa_t *sa0 = 0;
3228 pool_get (km->sais, sa0);
3229 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3230 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3232 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3240 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3241 ikev2_child_sa_t * csa)
3243 /* Create the Initiator notification for child SA removal */
3244 ikev2_main_t *km = &ikev2_main;
3249 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3252 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3253 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3254 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3255 vec_resize (sa->del, 1);
3256 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3257 sa->del->spi = csa->i_proposals->spi;
3258 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3259 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3260 len = ikev2_generate_message (sa, ike0, 0);
3262 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3264 /* delete local child SA */
3265 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3266 ikev2_sa_del_child_sa (sa, csa);
3270 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3273 ikev2_main_t *km = &ikev2_main;
3274 ikev2_main_per_thread_data_t *tkm;
3275 ikev2_sa_t *fsa = 0;
3276 ikev2_child_sa_t *fchild = 0;
3278 /* Search for the child SA */
3279 vec_foreach (tkm, km->per_thread_data)
3285 pool_foreach (sa, tkm->sas, ({
3286 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3296 if (!fchild || !fsa)
3298 r = clib_error_return (0, "Child SA not found");
3303 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3310 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3313 ikev2_main_t *km = &ikev2_main;
3314 ikev2_main_per_thread_data_t *tkm;
3315 ikev2_sa_t *fsa = 0;
3316 ikev2_main_per_thread_data_t *ftkm = 0;
3318 /* Search for the IKE SA */
3319 vec_foreach (tkm, km->per_thread_data)
3325 pool_foreach (sa, tkm->sas, ({
3326 if (sa->ispi == ispi)
3338 r = clib_error_return (0, "IKE SA not found");
3343 /* Create the Initiator notification for IKE SA removal */
3349 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3352 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3353 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3354 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3355 vec_resize (fsa->del, 1);
3356 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3357 fsa->del->spi = ispi;
3358 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3359 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3360 len = ikev2_generate_message (fsa, ike0, 0);
3362 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3366 /* delete local SA */
3367 ikev2_child_sa_t *c;
3368 vec_foreach (c, fsa->childs)
3370 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3371 ikev2_sa_del_child_sa (fsa, c);
3373 ikev2_sa_free_all_vec (fsa);
3374 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3377 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3378 pool_put (ftkm->sas, fsa);
3386 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3387 ikev2_child_sa_t * csa)
3389 /* Create the Initiator request for create child SA */
3395 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3398 ike0->version = IKE_VERSION_2;
3399 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3400 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3401 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3402 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3403 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3404 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3406 ikev2_rekey_t *rekey;
3407 vec_add2 (sa->rekey, rekey, 1);
3408 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3411 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3412 rekey->spi = proposals[0].spi;
3413 rekey->ispi = csa->i_proposals->spi;
3414 len = ikev2_generate_message (sa, ike0, proposals);
3415 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3416 vec_free (proposals);
3420 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3423 ikev2_main_t *km = &ikev2_main;
3424 ikev2_main_per_thread_data_t *tkm;
3425 ikev2_sa_t *fsa = 0;
3426 ikev2_child_sa_t *fchild = 0;
3428 /* Search for the child SA */
3429 vec_foreach (tkm, km->per_thread_data)
3435 pool_foreach (sa, tkm->sas, ({
3436 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3446 if (!fchild || !fsa)
3448 r = clib_error_return (0, "Child SA not found");
3453 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3460 ikev2_init (vlib_main_t * vm)
3462 ikev2_main_t *km = &ikev2_main;
3463 vlib_thread_main_t *tm = vlib_get_thread_main ();
3466 clib_memset (km, 0, sizeof (ikev2_main_t));
3467 km->vnet_main = vnet_get_main ();
3470 ikev2_crypto_init (km);
3472 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3474 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3475 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3477 km->per_thread_data[thread_id].sa_by_rspi =
3478 hash_create (0, sizeof (uword));
3481 km->sa_by_ispi = hash_create (0, sizeof (uword));
3483 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3485 ikev2_cli_reference ();
3491 VLIB_INIT_FUNCTION (ikev2_init) =
3493 .runs_after = VLIB_INITS("ipsec_init"),
3499 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3501 ikev2_main_t *km = &ikev2_main;
3502 ikev2_profile_t *p = 0;
3503 vlib_main_t *vm = km->vlib_main;
3504 f64 now = vlib_time_now (vm);
3507 if (sa->is_profile_index_set)
3508 p = pool_elt_at_index (km->profiles, sa->profile_index);
3510 if (sa->is_initiator && p && csa->time_to_expiration
3511 && now > csa->time_to_expiration)
3513 if (!csa->is_expired || csa->rekey_retries > 0)
3515 ikev2_rekey_child_sa_internal (vm, sa, csa);
3516 csa->time_to_expiration = now + p->handover;
3517 csa->is_expired = 1;
3518 if (csa->rekey_retries == 0)
3520 csa->rekey_retries = 5;
3522 else if (csa->rekey_retries > 0)
3524 csa->rekey_retries--;
3525 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3526 csa->i_proposals->spi, csa->rekey_retries);
3527 if (csa->rekey_retries == 0)
3529 csa->rekey_retries = -1;
3536 csa->time_to_expiration = 0;
3537 ikev2_delete_child_sa_internal (vm, sa, csa);
3546 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3548 ikev2_main_t *km = &ikev2_main;
3549 vlib_main_t *vm = km->vlib_main;
3550 ikev2_main_per_thread_data_t *tkm;
3551 ikev2_sa_t *fsa = 0;
3552 ikev2_profile_t *p = 0;
3553 ikev2_child_sa_t *fchild = 0;
3554 f64 now = vlib_time_now (vm);
3555 vlib_counter_t counts;
3557 /* Search for the SA and child SA */
3558 vec_foreach (tkm, km->per_thread_data)
3564 pool_foreach (sa, tkm->sas, ({
3565 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3574 vlib_get_combined_counter (&ipsec_sa_counters,
3575 ipsec_sa->stat_index, &counts);
3577 if (fsa && fsa->is_profile_index_set)
3578 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3580 if (fchild && p && p->lifetime_maxdata)
3582 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3584 fchild->time_to_expiration = now;
3589 static vlib_node_registration_t ikev2_mngr_process_node;
3592 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3595 ikev2_main_t *km = &ikev2_main;
3596 ipsec_main_t *im = &ipsec_main;
3601 vlib_process_wait_for_event_or_clock (vm, 1);
3602 vlib_process_get_events (vm, NULL);
3604 /* process ike child sas */
3605 ikev2_main_per_thread_data_t *tkm;
3606 vec_foreach (tkm, km->per_thread_data)
3610 pool_foreach (sa, tkm->sas, ({
3611 ikev2_child_sa_t *c;
3612 vec_foreach (c, sa->childs)
3614 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3620 /* process ipsec sas */
3623 pool_foreach (sa, im->sad, ({
3624 ikev2_mngr_process_ipsec_sa(sa);
3630 vlib_process_wait_for_event_or_clock (vm, 5);
3631 vlib_process_get_events (vm, NULL);
3640 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3641 .function = ikev2_mngr_process_fn,
3642 .type = VLIB_NODE_TYPE_PROCESS,
3644 "ikev2-manager-process",
3647 VLIB_PLUGIN_REGISTER () = {
3648 .version = VPP_BUILD_VER,
3649 .description = "Internet Key Exchange (IKEv2) Protocol",
3654 * fd.io coding-style-patch-verification: ON
3657 * eval: (c-set-style "gnu")