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)
1541 ikev2_main_t *km = &ikev2_main;
1546 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1547 &a->local_ip, &a->remote_ip, 0,
1548 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1549 TUNNEL_MODE_P2P, &sw_if_index);
1551 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1553 p = hash_get (km->sw_if_indices, sw_if_index);
1555 /* interface is managed by IKE; proceed with updating SAs */
1561 clib_warning ("installing ipip tunnel failed! loc:%U rem:%U",
1562 format_ip4_address, &a->local_ip,
1563 format_ip4_address, &a->remote_ip);
1567 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1569 IPSEC_PROTOCOL_ESP, a->encr_type,
1570 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1571 a->flags, 0, a->salt_local, &a->local_ip,
1572 &a->remote_ip, NULL);
1573 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1574 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1575 a->integ_type, &a->rem_ikey,
1576 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1577 a->salt_remote, &a->remote_ip,
1578 &a->local_ip, NULL);
1581 vec_add1 (sas_in, a->remote_sa_id);
1582 rv |= ipsec_tun_protect_update (sw_if_index, a->local_sa_id, sas_in);
1583 hash_set1 (km->sw_if_indices, sw_if_index);
1587 ikev2_create_tunnel_interface (vnet_main_t * vnm,
1590 ikev2_child_sa_t * child, u32 sa_index,
1593 ikev2_main_t *km = &ikev2_main;
1594 ipsec_crypto_alg_t encr_type;
1595 ipsec_integ_alg_t integ_type;
1596 ikev2_profile_t *p = 0;
1597 ikev2_sa_transform_t *tr;
1598 ikev2_sa_proposal_t *proposals;
1600 ikev2_add_ipsec_tunnel_args_t a;
1602 clib_memset (&a, 0, sizeof (a));
1604 if (!child->r_proposals)
1606 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1610 if (sa->is_initiator)
1612 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1613 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1614 proposals = child->i_proposals;
1615 a.local_spi = child->r_proposals[0].spi;
1616 a.remote_spi = child->i_proposals[0].spi;
1620 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1621 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1622 proposals = child->r_proposals;
1623 a.local_spi = child->i_proposals[0].spi;
1624 a.remote_spi = child->r_proposals[0].spi;
1627 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1629 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1630 if (tr && tr->esn_type)
1631 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1633 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1636 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1638 switch (tr->key_len)
1641 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1644 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1647 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1650 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1655 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1658 switch (tr->key_len)
1661 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1664 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1667 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1670 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1678 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1684 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1687 a.encr_type = encr_type;
1691 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1694 switch (tr->integ_type)
1696 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1697 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1699 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1700 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1702 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1703 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1705 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1706 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1709 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1715 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1721 integ_type = IPSEC_INTEG_ALG_NONE;
1724 a.integ_type = integ_type;
1725 ikev2_calc_child_keys (sa, child);
1727 if (sa->is_initiator)
1729 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1730 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1731 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1732 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1735 a.salt_remote = child->salt_er;
1736 a.salt_local = child->salt_ei;
1741 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
1742 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
1743 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
1744 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
1747 a.salt_remote = child->salt_ei;
1748 a.salt_local = child->salt_er;
1752 if (sa->is_profile_index_set)
1753 p = pool_elt_at_index (km->profiles, sa->profile_index);
1755 if (p && p->lifetime)
1757 child->time_to_expiration =
1758 vlib_time_now (vnm->vlib_main) + p->lifetime;
1759 if (p->lifetime_jitter)
1761 // This is not much better than rand(3), which Coverity warns
1762 // is unsuitable for security applications; random_u32 is
1763 // however fast. If this perturbance to the expiration time
1764 // needs to use a better RNG then we may need to use something
1765 // like /dev/urandom which has significant overhead.
1766 u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1767 rnd = random_u32 (&rnd);
1769 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
1773 if (thread_index & 0xffffffc0)
1774 clib_warning ("error: thread index exceeds max range 0x3f!");
1776 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
1777 clib_warning ("error: sa/child index exceeds max range 0xfff!");
1779 child->local_sa_id =
1781 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
1782 child->remote_sa_id =
1784 ikev2_mk_remote_sa_id (sa_index, child_index, thread_index);
1786 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
1787 (u8 *) & a, sizeof (a));
1793 ip46_address_t local_ip;
1794 ip46_address_t remote_ip;
1797 } ikev2_del_ipsec_tunnel_args_t;
1800 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
1802 ikev2_main_t *km = &ikev2_main;
1804 ipip_tunnel_key_t key = {
1806 .dst = a->remote_ip,
1807 .transport = IPIP_TRANSPORT_IP4,
1810 ipip_tunnel_t *ipip;
1813 ipip = ipip_tunnel_db_find (&key);
1817 hash_unset (km->sw_if_indices, ipip->sw_if_index);
1818 ipsec_tun_protect_del (ipip->sw_if_index);
1819 ipsec_sa_unlock_id (a->remote_sa_id);
1820 ipsec_sa_unlock_id (a->local_sa_id);
1821 ipip_del_tunnel (ipip->sw_if_index);
1826 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
1827 ikev2_child_sa_t * child)
1829 ikev2_del_ipsec_tunnel_args_t a;
1831 clib_memset (&a, 0, sizeof (a));
1833 if (sa->is_initiator)
1835 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1836 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1840 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1841 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1844 a.remote_sa_id = child->remote_sa_id;
1845 a.local_sa_id = child->local_sa_id;
1847 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
1853 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1856 ike_payload_header_t *ph;
1860 ikev2_sa_transform_t *tr_encr, *tr_integ;
1862 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1864 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1866 ikev2_payload_chain_t *chain = 0;
1867 ikev2_payload_new_chain (chain);
1869 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1871 if (sa->r_proposals == 0)
1873 ikev2_payload_add_notify (chain,
1874 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1875 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1877 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1879 u8 *data = vec_new (u8, 2);
1880 ikev2_sa_transform_t *tr_dh;
1882 ikev2_sa_get_td_for_type (sa->r_proposals,
1883 IKEV2_TRANSFORM_TYPE_DH);
1884 ASSERT (tr_dh && tr_dh->dh_type);
1886 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1887 data[1] = (tr_dh->dh_type) & 0xff;
1889 ikev2_payload_add_notify (chain,
1890 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1893 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1895 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1897 u8 *data = vec_new (u8, 1);
1899 data[0] = sa->unsupported_cp;
1900 ikev2_payload_add_notify (chain,
1901 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1907 ike->rspi = clib_host_to_net_u64 (sa->rspi);
1908 ikev2_payload_add_sa (chain, sa->r_proposals);
1909 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1910 ikev2_payload_add_nonce (chain, sa->r_nonce);
1913 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1915 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1917 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1918 ikev2_payload_add_auth (chain, &sa->r_auth);
1919 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
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_AUTH_FAILED)
1925 ikev2_payload_add_notify (chain,
1926 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1928 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1930 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1932 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1934 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1935 ikev2_payload_add_auth (chain, &sa->r_auth);
1937 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1939 ikev2_payload_add_notify (chain,
1940 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1941 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1942 ikev2_payload_add_auth (chain, &sa->r_auth);
1943 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1944 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1946 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1948 u8 *data = vec_new (u8, 1);
1950 data[0] = sa->unsupported_cp;
1951 ikev2_payload_add_notify (chain,
1952 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1956 else if (sa->state == IKEV2_STATE_SA_INIT)
1958 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
1959 ikev2_payload_add_auth (chain, &sa->i_auth);
1960 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1961 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1962 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1966 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1970 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1972 /* if pending delete */
1975 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1977 if (sa->is_initiator)
1978 ikev2_payload_add_delete (chain, sa->del);
1980 /* The response to a request that deletes the IKE SA is an empty
1981 INFORMATIONAL response. */
1982 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1984 /* The response to a request that deletes ESP or AH SAs will contain
1985 delete payloads for the paired SAs going in the other direction. */
1988 ikev2_payload_add_delete (chain, sa->del);
1993 /* received N(AUTHENTICATION_FAILED) */
1994 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1996 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1999 /* received unsupported critical payload */
2000 else if (sa->unsupported_cp)
2002 u8 *data = vec_new (u8, 1);
2004 data[0] = sa->unsupported_cp;
2005 ikev2_payload_add_notify (chain,
2006 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2009 sa->unsupported_cp = 0;
2011 /* else send empty response */
2013 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2015 if (sa->is_initiator)
2018 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2019 ikev2_notify_t notify;
2020 u8 *data = vec_new (u8, 4);
2021 clib_memset (¬ify, 0, sizeof (notify));
2022 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2023 notify.spi = sa->childs[0].i_proposals->spi;
2024 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2026 ikev2_payload_add_sa (chain, proposals);
2027 ikev2_payload_add_nonce (chain, sa->i_nonce);
2028 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2029 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2030 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2039 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2040 ikev2_payload_add_nonce (chain, sa->r_nonce);
2041 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2043 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2045 vec_del1 (sa->rekey, 0);
2047 else if (sa->unsupported_cp)
2049 u8 *data = vec_new (u8, 1);
2051 data[0] = sa->unsupported_cp;
2052 ikev2_payload_add_notify (chain,
2053 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2056 sa->unsupported_cp = 0;
2060 ikev2_payload_add_notify (chain,
2061 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2068 ike->version = IKE_VERSION_2;
2069 ike->nextpayload = IKEV2_PAYLOAD_SK;
2070 tlen = sizeof (*ike);
2071 if (sa->is_initiator)
2073 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2074 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2078 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2082 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2084 tlen += vec_len (chain->data);
2085 ike->nextpayload = chain->first_payload_type;
2086 ike->length = clib_host_to_net_u32 (tlen);
2087 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2089 /* store whole IKE payload - needed for PSK auth */
2090 vec_free (sa->last_sa_init_res_packet_data);
2091 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2096 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2099 plen = sizeof (*ph);
2100 ph = (ike_payload_header_t *) & ike->payload[0];
2101 ph->nextpayload = chain->first_payload_type;
2103 int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
2106 /* add space for hmac */
2107 plen += tr_integ->key_trunc;
2110 /* payload and total length */
2111 ph->length = clib_host_to_net_u16 (plen);
2112 ike->length = clib_host_to_net_u32 (tlen);
2114 /* calc integrity data for whole packet except hash itself */
2116 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2117 (u8 *) ike, tlen - tr_integ->key_trunc);
2119 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2120 sizeof (*ike), integ, tr_integ->key_trunc);
2122 /* store whole IKE payload - needed for retransmit */
2123 vec_free (sa->last_res_packet_data);
2124 vec_add (sa->last_res_packet_data, ike, tlen);
2128 ikev2_payload_destroy_chain (chain);
2134 ikev2_retransmit_sa_init (ike_header_t * ike,
2135 ip4_address_t iaddr, ip4_address_t raddr)
2137 ikev2_main_t *km = &ikev2_main;
2139 u32 thread_index = vlib_get_thread_index ();
2142 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2143 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2144 sa->iaddr.as_u32 == iaddr.as_u32 &&
2145 sa->raddr.as_u32 == raddr.as_u32)
2148 u32 len = clib_net_to_host_u32(ike->length);
2149 u8 payload = ike->nextpayload;
2151 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
2152 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2153 u32 plen = clib_net_to_host_u16(ikep->length);
2155 if (plen < sizeof(ike_payload_header_t))
2158 if (payload == IKEV2_PAYLOAD_NONCE)
2160 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
2162 /* req is retransmit */
2163 if (sa->state == IKEV2_STATE_SA_INIT)
2166 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2167 ike->ispi = tmp->ispi;
2168 ike->rspi = tmp->rspi;
2169 ike->nextpayload = tmp->nextpayload;
2170 ike->version = tmp->version;
2171 ike->exchange = tmp->exchange;
2172 ike->flags = tmp->flags;
2173 ike->msgid = tmp->msgid;
2174 ike->length = tmp->length;
2175 clib_memcpy_fast(ike->payload, tmp->payload,
2176 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
2177 clib_warning("IKE_SA_INIT retransmit from %U to %U",
2178 format_ip4_address, &raddr,
2179 format_ip4_address, &iaddr);
2182 /* else ignore req */
2185 clib_warning("IKE_SA_INIT ignore from %U to %U",
2186 format_ip4_address, &raddr,
2187 format_ip4_address, &iaddr);
2192 payload = ikep->nextpayload;
2199 /* req is not retransmit */
2204 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2206 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2209 if (msg_id > sa->last_msg_id)
2211 sa->last_msg_id = msg_id;
2214 /* retransmitted req */
2215 else if (msg_id == sa->last_msg_id)
2218 tmp = (ike_header_t *) sa->last_res_packet_data;
2219 ike->ispi = tmp->ispi;
2220 ike->rspi = tmp->rspi;
2221 ike->nextpayload = tmp->nextpayload;
2222 ike->version = tmp->version;
2223 ike->exchange = tmp->exchange;
2224 ike->flags = tmp->flags;
2225 ike->msgid = tmp->msgid;
2226 ike->length = tmp->length;
2227 clib_memcpy_fast (ike->payload, tmp->payload,
2228 clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2229 clib_warning ("IKE msgid %u retransmit from %U to %U",
2231 format_ip4_address, &sa->raddr,
2232 format_ip4_address, &sa->iaddr);
2235 /* old req ignore */
2238 clib_warning ("IKE msgid %u req ignore from %U to %U",
2240 format_ip4_address, &sa->raddr,
2241 format_ip4_address, &sa->iaddr);
2248 ikev2_node_fn (vlib_main_t * vm,
2249 vlib_node_runtime_t * node, vlib_frame_t * frame)
2251 u32 n_left_from, *from, *to_next;
2252 ikev2_next_t next_index;
2253 ikev2_main_t *km = &ikev2_main;
2254 u32 thread_index = vlib_get_thread_index ();
2256 from = vlib_frame_vector_args (frame);
2257 n_left_from = frame->n_vectors;
2258 next_index = node->cached_next_index;
2260 while (n_left_from > 0)
2264 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2266 while (n_left_from > 0 && n_left_to_next > 0)
2270 u32 next0 = IKEV2_NEXT_ERROR_DROP;
2275 ikev2_sa_t *sa0 = 0;
2276 ikev2_sa_t sa; /* temporary store for SA */
2280 /* speculatively enqueue b0 to the current next frame */
2286 n_left_to_next -= 1;
2288 b0 = vlib_get_buffer (vm, bi0);
2289 ike0 = vlib_buffer_get_current (b0);
2290 vlib_buffer_advance (b0, -sizeof (*udp0));
2291 udp0 = vlib_buffer_get_current (b0);
2292 vlib_buffer_advance (b0, -sizeof (*ip40));
2293 ip40 = vlib_buffer_get_current (b0);
2295 if (ike0->version != IKE_VERSION_2)
2297 vlib_node_increment_counter (vm, ikev2_node.index,
2298 IKEV2_ERROR_NOT_IKEV2, 1);
2302 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2305 clib_memset (sa0, 0, sizeof (*sa0));
2307 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2309 if (ike0->rspi == 0)
2311 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2312 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2314 r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2318 vlib_node_increment_counter (vm, ikev2_node.index,
2319 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2321 len = clib_net_to_host_u32 (ike0->length);
2326 vlib_node_increment_counter (vm, ikev2_node.index,
2327 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2332 ikev2_process_sa_init_req (vm, sa0, ike0);
2334 if (sa0->state == IKEV2_STATE_SA_INIT)
2336 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2338 ikev2_select_proposal (sa0->i_proposals,
2339 IKEV2_PROTOCOL_IKE);
2340 ikev2_generate_sa_init_data (sa0);
2343 if (sa0->state == IKEV2_STATE_SA_INIT
2344 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2346 len = ikev2_generate_message (sa0, ike0, 0);
2349 if (sa0->state == IKEV2_STATE_SA_INIT)
2351 /* add SA to the pool */
2352 pool_get (km->per_thread_data[thread_index].sas,
2354 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2356 per_thread_data[thread_index].sa_by_rspi,
2359 km->per_thread_data[thread_index].sas);
2363 ikev2_sa_free_all_vec (sa0);
2367 else //received sa_init without initiator flag
2369 ikev2_process_sa_init_resp (vm, sa0, ike0);
2371 if (sa0->state == IKEV2_STATE_SA_INIT)
2373 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2374 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2378 pool_elt_at_index (km->sais, p[0]);
2380 ikev2_complete_sa_data (sa0, sai);
2381 ikev2_calc_keys (sa0);
2382 ikev2_sa_auth_init (sa0);
2383 len = ikev2_generate_message (sa0, ike0, 0);
2387 if (sa0->state == IKEV2_STATE_SA_INIT)
2389 /* add SA to the pool */
2390 pool_get (km->per_thread_data[thread_index].sas, sa0);
2391 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2392 hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2394 sa0 - km->per_thread_data[thread_index].sas);
2398 ikev2_sa_free_all_vec (sa0);
2402 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2405 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2406 clib_net_to_host_u64 (ike0->rspi));
2410 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2413 r = ikev2_retransmit_resp (sa0, ike0);
2416 vlib_node_increment_counter (vm, ikev2_node.index,
2417 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2419 len = clib_net_to_host_u32 (ike0->length);
2424 vlib_node_increment_counter (vm, ikev2_node.index,
2425 IKEV2_ERROR_IKE_REQ_IGNORE,
2430 ikev2_process_auth_req (vm, sa0, ike0);
2431 ikev2_sa_auth (sa0);
2432 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2434 ikev2_initial_contact_cleanup (sa0);
2435 ikev2_sa_match_ts (sa0);
2436 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2437 ikev2_create_tunnel_interface (km->vnet_main,
2443 if (sa0->is_initiator)
2445 uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2449 pool_elt_at_index (km->sais, p[0]);
2450 hash_unset (km->sa_by_ispi, sai->ispi);
2451 ikev2_sa_free_all_vec (sai);
2452 pool_put (km->sais, sai);
2457 len = ikev2_generate_message (sa0, ike0, 0);
2461 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2464 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2465 clib_net_to_host_u64 (ike0->rspi));
2469 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2472 r = ikev2_retransmit_resp (sa0, ike0);
2475 vlib_node_increment_counter (vm, ikev2_node.index,
2476 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2478 len = clib_net_to_host_u32 (ike0->length);
2483 vlib_node_increment_counter (vm, ikev2_node.index,
2484 IKEV2_ERROR_IKE_REQ_IGNORE,
2489 ikev2_process_informational_req (vm, sa0, ike0);
2492 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2494 ikev2_delete_t *d, *tmp, *resp = 0;
2495 vec_foreach (d, sa0->del)
2497 ikev2_child_sa_t *ch_sa;
2498 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2500 !sa0->is_initiator);
2503 ikev2_delete_tunnel_interface (km->vnet_main,
2505 if (!sa0->is_initiator)
2507 vec_add2 (resp, tmp, 1);
2508 tmp->protocol_id = d->protocol_id;
2509 tmp->spi = ch_sa->r_proposals[0].spi;
2511 ikev2_sa_del_child_sa (sa0, ch_sa);
2514 if (!sa0->is_initiator)
2516 vec_free (sa0->del);
2521 if (!sa0->is_initiator)
2523 len = ikev2_generate_message (sa0, ike0, 0);
2527 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2530 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2531 clib_net_to_host_u64 (ike0->rspi));
2535 pool_elt_at_index (km->per_thread_data[thread_index].sas,
2538 r = ikev2_retransmit_resp (sa0, ike0);
2541 vlib_node_increment_counter (vm, ikev2_node.index,
2542 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2544 len = clib_net_to_host_u32 (ike0->length);
2549 vlib_node_increment_counter (vm, ikev2_node.index,
2550 IKEV2_ERROR_IKE_REQ_IGNORE,
2555 ikev2_process_create_child_sa_req (vm, sa0, ike0);
2558 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2561 vec_free (sa0->childs);
2562 ikev2_child_sa_t *child;
2563 vec_add2 (sa0->childs, child, 1);
2564 child->r_proposals = sa0->rekey[0].r_proposal;
2565 child->i_proposals = sa0->rekey[0].i_proposal;
2566 child->tsi = sa0->rekey[0].tsi;
2567 child->tsr = sa0->rekey[0].tsr;
2568 ikev2_create_tunnel_interface (km->vnet_main,
2571 child - sa0->childs);
2573 if (sa0->is_initiator)
2575 vec_del1 (sa0->rekey, 0);
2579 len = ikev2_generate_message (sa0, ike0, 0);
2586 clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2588 format_ip4_address, ip40->src_address.as_u8,
2589 format_ip4_address, ip40->dst_address.as_u8);
2593 /* if we are sending packet back, rewrite headers */
2596 next0 = IKEV2_NEXT_IP4_LOOKUP;
2597 if (sa0->is_initiator)
2599 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2600 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2604 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2605 ip40->src_address.as_u32 = sa0->raddr.as_u32;
2608 clib_host_to_net_u16 (len + sizeof (udp_header_t));
2610 b0->current_length =
2611 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2612 ip40->length = clib_host_to_net_u16 (b0->current_length);
2613 ip40->checksum = ip4_header_checksum (ip40);
2616 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2617 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
2619 ikev2_child_sa_t *c;
2621 vec_foreach (c, sa0->childs)
2622 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
2624 ikev2_delete_sa (sa0);
2626 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2628 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
2629 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2631 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2632 t->sw_if_index = sw_if_index0;
2633 t->next_index = next0;
2636 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2637 n_left_to_next, bi0, next0);
2640 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2643 vlib_node_increment_counter (vm, ikev2_node.index,
2644 IKEV2_ERROR_PROCESSED, frame->n_vectors);
2645 return frame->n_vectors;
2649 VLIB_REGISTER_NODE (ikev2_node,static) = {
2650 .function = ikev2_node_fn,
2652 .vector_size = sizeof (u32),
2653 .format_trace = format_ikev2_trace,
2654 .type = VLIB_NODE_TYPE_INTERNAL,
2656 .n_errors = ARRAY_LEN(ikev2_error_strings),
2657 .error_strings = ikev2_error_strings,
2659 .n_next_nodes = IKEV2_N_NEXT,
2662 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2663 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2668 // set ikev2 proposals when vpp is used as initiator
2669 static clib_error_t *
2670 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
2671 ikev2_transforms_set * ts,
2672 ikev2_sa_proposal_t ** proposals, int is_ike)
2675 ikev2_main_t *km = &ikev2_main;
2676 ikev2_sa_proposal_t *proposal;
2677 vec_add2 (*proposals, proposal, 1);
2678 ikev2_sa_transform_t *td;
2683 vec_foreach (td, km->supported_transforms)
2685 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2686 && td->encr_type == ts->crypto_alg
2687 && td->key_len == ts->crypto_key_size / 8)
2690 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2691 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2692 vec_add (td->attrs, (u8 *) attr, 4);
2693 vec_add1 (proposal->transforms, *td);
2702 r = clib_error_return (0, "Unsupported algorithm");
2708 vec_foreach (td, km->supported_transforms)
2710 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2711 && td->integ_type == ts->integ_alg)
2713 vec_add1 (proposal->transforms, *td);
2721 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
2722 r = clib_error_return (0, "Unsupported algorithm");
2730 vec_foreach (td, km->supported_transforms)
2732 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2733 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
2735 vec_add1 (proposal->transforms, *td);
2742 r = clib_error_return (0, "Unsupported algorithm");
2748 if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE)
2751 vec_foreach (td, km->supported_transforms)
2753 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2755 vec_add1 (proposal->transforms, *td);
2758 sa->dh_group = td->dh_type;
2766 r = clib_error_return (0, "Unsupported algorithm");
2774 vec_foreach (td, km->supported_transforms)
2776 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2778 vec_add1 (proposal->transforms, *td);
2785 r = clib_error_return (0, "Unsupported algorithm");
2794 static ikev2_profile_t *
2795 ikev2_profile_index_by_name (u8 * name)
2797 ikev2_main_t *km = &ikev2_main;
2800 p = mhash_get (&km->profile_index_by_name, name);
2804 return pool_elt_at_index (km->profiles, p[0]);
2809 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
2818 b0 = vlib_get_buffer (vm, bi0);
2819 vlib_buffer_advance (b0, -sizeof (udp_header_t));
2820 udp0 = vlib_buffer_get_current (b0);
2821 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2822 ip40 = vlib_buffer_get_current (b0);
2825 ip40->ip_version_and_header_length = 0x45;
2827 ip40->fragment_id = 0;
2828 ip40->flags_and_fragment_offset = 0;
2830 ip40->protocol = IP_PROTOCOL_UDP;
2831 ip40->dst_address.as_u32 = dst->as_u32;
2832 ip40->src_address.as_u32 = src->as_u32;
2833 udp0->dst_port = clib_host_to_net_u16 (500);
2834 udp0->src_port = clib_host_to_net_u16 (500);
2835 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2837 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2838 ip40->length = clib_host_to_net_u16 (b0->current_length);
2839 ip40->checksum = ip4_header_checksum (ip40);
2842 /* send the request */
2843 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2844 to_next = vlib_frame_vector_args (f);
2847 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2852 ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
2855 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2860 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2861 *ike = vlib_buffer_get_current (b0);
2866 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
2868 ikev2_main_t *km = &ikev2_main;
2870 km->pkey = ikev2_load_key_file (file);
2871 if (km->pkey == NULL)
2872 return clib_error_return (0, "load key '%s' failed", file);
2878 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2880 ikev2_main_t *km = &ikev2_main;
2885 if (ikev2_profile_index_by_name (name))
2886 return clib_error_return (0, "policy %v already exists", name);
2888 pool_get (km->profiles, p);
2889 clib_memset (p, 0, sizeof (*p));
2890 p->name = vec_dup (name);
2891 p->responder.sw_if_index = ~0;
2892 uword index = p - km->profiles;
2893 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2897 p = ikev2_profile_index_by_name (name);
2899 return clib_error_return (0, "policy %v does not exists", name);
2902 pool_put (km->profiles, p);
2903 mhash_unset (&km->profile_index_by_name, name, 0);
2909 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2910 u8 * auth_data, u8 data_hex_format)
2915 p = ikev2_profile_index_by_name (name);
2919 r = clib_error_return (0, "unknown profile %v", name);
2922 vec_free (p->auth.data);
2923 p->auth.method = auth_method;
2924 p->auth.data = vec_dup (auth_data);
2925 p->auth.hex = data_hex_format;
2927 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2929 vec_add1 (p->auth.data, 0);
2931 EVP_PKEY_free (p->auth.key);
2932 p->auth.key = ikev2_load_cert_file (auth_data);
2933 if (p->auth.key == NULL)
2934 return clib_error_return (0, "load cert '%s' failed", auth_data);
2941 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2947 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2948 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2950 r = clib_error_return (0, "unsupported identity type %U",
2951 format_ikev2_id_type, id_type);
2955 p = ikev2_profile_index_by_name (name);
2959 r = clib_error_return (0, "unknown profile %v", name);
2965 vec_free (p->loc_id.data);
2966 p->loc_id.type = id_type;
2967 p->loc_id.data = vec_dup (data);
2971 vec_free (p->rem_id.data);
2972 p->rem_id.type = id_type;
2973 p->rem_id.data = vec_dup (data);
2980 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2981 u16 start_port, u16 end_port, ip4_address_t start_addr,
2982 ip4_address_t end_addr, int is_local)
2987 p = ikev2_profile_index_by_name (name);
2991 r = clib_error_return (0, "unknown profile %v", name);
2997 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2998 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2999 p->loc_ts.start_port = start_port;
3000 p->loc_ts.end_port = end_port;
3001 p->loc_ts.protocol_id = protocol_id;
3002 p->loc_ts.ts_type = 7;
3006 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3007 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3008 p->rem_ts.start_port = start_port;
3009 p->rem_ts.end_port = end_port;
3010 p->rem_ts.protocol_id = protocol_id;
3011 p->rem_ts.ts_type = 7;
3019 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3020 u32 sw_if_index, ip4_address_t ip4)
3025 p = ikev2_profile_index_by_name (name);
3029 r = clib_error_return (0, "unknown profile %v", name);
3033 p->responder.sw_if_index = sw_if_index;
3034 p->responder.ip4 = ip4;
3040 ikev2_set_profile_ike_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->ike_ts.crypto_alg = crypto_alg;
3058 p->ike_ts.integ_alg = integ_alg;
3059 p->ike_ts.dh_type = dh_type;
3060 p->ike_ts.crypto_key_size = crypto_key_size;
3065 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3066 ikev2_transform_encr_type_t crypto_alg,
3067 ikev2_transform_integ_type_t integ_alg,
3068 ikev2_transform_dh_type_t dh_type,
3069 u32 crypto_key_size)
3074 p = ikev2_profile_index_by_name (name);
3078 r = clib_error_return (0, "unknown profile %v", name);
3082 p->esp_ts.crypto_alg = crypto_alg;
3083 p->esp_ts.integ_alg = integ_alg;
3084 p->esp_ts.dh_type = dh_type;
3085 p->esp_ts.crypto_key_size = crypto_key_size;
3090 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3091 u64 lifetime, u32 jitter, u32 handover,
3097 p = ikev2_profile_index_by_name (name);
3101 r = clib_error_return (0, "unknown profile %v", name);
3105 p->lifetime = lifetime;
3106 p->lifetime_jitter = jitter;
3107 p->handover = handover;
3108 p->lifetime_maxdata = maxdata;
3113 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3117 ip4_main_t *im = &ip4_main;
3118 ikev2_main_t *km = &ikev2_main;
3120 p = ikev2_profile_index_by_name (name);
3124 r = clib_error_return (0, "unknown profile %v", name);
3128 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3130 r = clib_error_return (0, "responder not set for profile %v", name);
3135 /* Create the Initiator Request */
3139 ip_lookup_main_t *lm = &im->lookup_main;
3141 int len = sizeof (ike_header_t);
3143 /* Get own iface IP */
3145 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3146 ip_interface_address_t *if_add =
3147 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3148 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3150 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3152 /* Prepare the SA and the IKE payload */
3154 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3155 ikev2_payload_chain_t *chain = 0;
3156 ikev2_payload_new_chain (chain);
3158 /* Build the IKE proposal payload */
3159 ikev2_sa_proposal_t *proposals = 0;
3160 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3161 proposals[0].proposal_num = 1;
3162 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3164 /* Add and then cleanup proposal data */
3165 ikev2_payload_add_sa (chain, proposals);
3166 ikev2_sa_free_proposal_vector (&proposals);
3168 sa.is_initiator = 1;
3169 sa.profile_index = km->profiles - p;
3170 sa.is_profile_index_set = 1;
3171 sa.state = IKEV2_STATE_SA_INIT;
3172 ikev2_generate_sa_init_data (&sa);
3173 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3174 ikev2_payload_add_nonce (chain, sa.i_nonce);
3176 /* Build the child SA proposal */
3177 vec_resize (sa.childs, 1);
3178 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3179 &sa.childs[0].i_proposals, 0);
3180 sa.childs[0].i_proposals[0].proposal_num = 1;
3181 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3182 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3183 sizeof (sa.childs[0].i_proposals[0].spi));
3187 /* Add NAT detection notification messages (mandatory) */
3188 u8 nat_detection_source[8 + 8 + 4 + 2];
3189 u8 *nat_detection_sha1 = vec_new (u8, 20);
3191 u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
3192 clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
3193 tmpspi = clib_host_to_net_u64 (sa.rspi);
3194 clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
3195 u16 tmpport = clib_host_to_net_u16 (500);
3196 clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
3198 u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
3199 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3200 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3201 nat_detection_sha1);
3202 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3203 nat_detection_sha1);
3204 tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
3205 clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
3206 SHA1 (nat_detection_source, sizeof (nat_detection_source),
3207 nat_detection_sha1);
3208 ikev2_payload_add_notify (chain,
3209 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3210 nat_detection_sha1);
3211 vec_free (nat_detection_sha1);
3213 u8 *sig_hash_algo = vec_new (u8, 8);
3214 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3215 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3216 ikev2_payload_add_notify (chain,
3217 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3219 vec_free (sig_hash_algo);
3222 /* Buffer update and boilerplate */
3223 len += vec_len (chain->data);
3224 ike0->nextpayload = chain->first_payload_type;
3225 ike0->length = clib_host_to_net_u32 (len);
3226 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3227 ikev2_payload_destroy_chain (chain);
3229 ike0->version = IKE_VERSION_2;
3230 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3231 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3232 ike0->ispi = sa.ispi;
3236 /* store whole IKE payload - needed for PSK auth */
3237 vec_free (sa.last_sa_init_req_packet_data);
3238 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3240 /* add data to the SA then add it to the pool */
3241 sa.iaddr.as_u32 = if_ip->as_u32;
3242 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3243 sa.i_id.type = p->loc_id.type;
3244 sa.i_id.data = vec_dup (p->loc_id.data);
3245 sa.i_auth.method = p->auth.method;
3246 sa.i_auth.hex = p->auth.hex;
3247 sa.i_auth.data = vec_dup (p->auth.data);
3248 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3249 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3251 /* add SA to the pool */
3252 ikev2_sa_t *sa0 = 0;
3253 pool_get (km->sais, sa0);
3254 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3255 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3257 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3265 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3266 ikev2_child_sa_t * csa)
3268 /* Create the Initiator notification for child SA removal */
3269 ikev2_main_t *km = &ikev2_main;
3274 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3277 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3278 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3279 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3280 vec_resize (sa->del, 1);
3281 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
3282 sa->del->spi = csa->i_proposals->spi;
3283 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3284 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3285 len = ikev2_generate_message (sa, ike0, 0);
3287 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3289 /* delete local child SA */
3290 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
3291 ikev2_sa_del_child_sa (sa, csa);
3295 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
3298 ikev2_main_t *km = &ikev2_main;
3299 ikev2_main_per_thread_data_t *tkm;
3300 ikev2_sa_t *fsa = 0;
3301 ikev2_child_sa_t *fchild = 0;
3303 /* Search for the child SA */
3304 vec_foreach (tkm, km->per_thread_data)
3310 pool_foreach (sa, tkm->sas, ({
3311 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3321 if (!fchild || !fsa)
3323 r = clib_error_return (0, "Child SA not found");
3328 ikev2_delete_child_sa_internal (vm, fsa, fchild);
3335 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
3338 ikev2_main_t *km = &ikev2_main;
3339 ikev2_main_per_thread_data_t *tkm;
3340 ikev2_sa_t *fsa = 0;
3341 ikev2_main_per_thread_data_t *ftkm = 0;
3343 /* Search for the IKE SA */
3344 vec_foreach (tkm, km->per_thread_data)
3350 pool_foreach (sa, tkm->sas, ({
3351 if (sa->ispi == ispi)
3363 r = clib_error_return (0, "IKE SA not found");
3368 /* Create the Initiator notification for IKE SA removal */
3374 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3377 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3378 ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3379 ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3380 vec_resize (fsa->del, 1);
3381 fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3382 fsa->del->spi = ispi;
3383 ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3384 fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3385 len = ikev2_generate_message (fsa, ike0, 0);
3387 ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3391 /* delete local SA */
3392 ikev2_child_sa_t *c;
3393 vec_foreach (c, fsa->childs)
3395 ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3396 ikev2_sa_del_child_sa (fsa, c);
3398 ikev2_sa_free_all_vec (fsa);
3399 uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3402 hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3403 pool_put (ftkm->sas, fsa);
3411 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
3412 ikev2_child_sa_t * csa)
3414 /* Create the Initiator request for create child SA */
3420 bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3423 ike0->version = IKE_VERSION_2;
3424 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3425 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3426 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3427 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3428 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3429 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3431 ikev2_rekey_t *rekey;
3432 vec_add2 (sa->rekey, rekey, 1);
3433 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3436 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3437 rekey->spi = proposals[0].spi;
3438 rekey->ispi = csa->i_proposals->spi;
3439 len = ikev2_generate_message (sa, ike0, proposals);
3440 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3441 vec_free (proposals);
3445 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
3448 ikev2_main_t *km = &ikev2_main;
3449 ikev2_main_per_thread_data_t *tkm;
3450 ikev2_sa_t *fsa = 0;
3451 ikev2_child_sa_t *fchild = 0;
3453 /* Search for the child SA */
3454 vec_foreach (tkm, km->per_thread_data)
3460 pool_foreach (sa, tkm->sas, ({
3461 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3471 if (!fchild || !fsa)
3473 r = clib_error_return (0, "Child SA not found");
3478 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3485 ikev2_init (vlib_main_t * vm)
3487 ikev2_main_t *km = &ikev2_main;
3488 vlib_thread_main_t *tm = vlib_get_thread_main ();
3491 clib_memset (km, 0, sizeof (ikev2_main_t));
3492 km->vnet_main = vnet_get_main ();
3495 ikev2_crypto_init (km);
3497 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
3499 vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3500 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3502 km->per_thread_data[thread_id].sa_by_rspi =
3503 hash_create (0, sizeof (uword));
3506 km->sa_by_ispi = hash_create (0, sizeof (uword));
3507 km->sw_if_indices = hash_create (0, 0);
3509 udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3511 ikev2_cli_reference ();
3517 VLIB_INIT_FUNCTION (ikev2_init) =
3519 .runs_after = VLIB_INITS("ipsec_init"),
3525 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
3527 ikev2_main_t *km = &ikev2_main;
3528 ikev2_profile_t *p = 0;
3529 vlib_main_t *vm = km->vlib_main;
3530 f64 now = vlib_time_now (vm);
3533 if (sa->is_profile_index_set)
3534 p = pool_elt_at_index (km->profiles, sa->profile_index);
3536 if (sa->is_initiator && p && csa->time_to_expiration
3537 && now > csa->time_to_expiration)
3539 if (!csa->is_expired || csa->rekey_retries > 0)
3541 ikev2_rekey_child_sa_internal (vm, sa, csa);
3542 csa->time_to_expiration = now + p->handover;
3543 csa->is_expired = 1;
3544 if (csa->rekey_retries == 0)
3546 csa->rekey_retries = 5;
3548 else if (csa->rekey_retries > 0)
3550 csa->rekey_retries--;
3551 clib_warning ("Rekeying Child SA 0x%x, retries left %d",
3552 csa->i_proposals->spi, csa->rekey_retries);
3553 if (csa->rekey_retries == 0)
3555 csa->rekey_retries = -1;
3562 csa->time_to_expiration = 0;
3563 ikev2_delete_child_sa_internal (vm, sa, csa);
3572 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
3574 ikev2_main_t *km = &ikev2_main;
3575 vlib_main_t *vm = km->vlib_main;
3576 ikev2_main_per_thread_data_t *tkm;
3577 ikev2_sa_t *fsa = 0;
3578 ikev2_profile_t *p = 0;
3579 ikev2_child_sa_t *fchild = 0;
3580 f64 now = vlib_time_now (vm);
3581 vlib_counter_t counts;
3583 /* Search for the SA and child SA */
3584 vec_foreach (tkm, km->per_thread_data)
3590 pool_foreach (sa, tkm->sas, ({
3591 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3600 vlib_get_combined_counter (&ipsec_sa_counters,
3601 ipsec_sa->stat_index, &counts);
3603 if (fsa && fsa->is_profile_index_set)
3604 p = pool_elt_at_index (km->profiles, fsa->profile_index);
3606 if (fchild && p && p->lifetime_maxdata)
3608 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
3610 fchild->time_to_expiration = now;
3615 static vlib_node_registration_t ikev2_mngr_process_node;
3618 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
3621 ikev2_main_t *km = &ikev2_main;
3622 ipsec_main_t *im = &ipsec_main;
3627 vlib_process_wait_for_event_or_clock (vm, 1);
3628 vlib_process_get_events (vm, NULL);
3630 /* process ike child sas */
3631 ikev2_main_per_thread_data_t *tkm;
3632 vec_foreach (tkm, km->per_thread_data)
3636 pool_foreach (sa, tkm->sas, ({
3637 ikev2_child_sa_t *c;
3638 vec_foreach (c, sa->childs)
3640 req_sent |= ikev2_mngr_process_child_sa(sa, c);
3646 /* process ipsec sas */
3649 pool_foreach (sa, im->sad, ({
3650 ikev2_mngr_process_ipsec_sa(sa);
3656 vlib_process_wait_for_event_or_clock (vm, 5);
3657 vlib_process_get_events (vm, NULL);
3666 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
3667 .function = ikev2_mngr_process_fn,
3668 .type = VLIB_NODE_TYPE_PROCESS,
3670 "ikev2-manager-process",
3673 VLIB_PLUGIN_REGISTER () = {
3674 .version = VPP_BUILD_VER,
3675 .description = "Internet Key Exchange (IKEv2) Protocol",
3680 * fd.io coding-style-patch-verification: ON
3683 * eval: (c-set-style "gnu")