2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 #define foreach_ikev2_error \
66 _(PROCESSED, "IKEv2 packets processed") \
67 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
68 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
69 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
70 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
71 _(NOT_IKEV2, "Non IKEv2 packets received") \
72 _(BAD_LENGTH, "Bad packet length") \
73 _(MALFORMED_PACKET, "Malformed packet") \
74 _(NO_BUFF_SPACE, "No buffer space")
78 #define _(sym,str) IKEV2_ERROR_##sym,
84 static char *ikev2_error_strings[] = {
85 #define _(sym,string) string,
92 IKEV2_NEXT_IP4_LOOKUP,
93 IKEV2_NEXT_IP4_ERROR_DROP,
99 IKEV2_NEXT_IP6_LOOKUP,
100 IKEV2_NEXT_IP6_ERROR_DROP,
104 typedef u32 ikev2_non_esp_marker;
106 static_always_inline u16
107 ikev2_get_port (ikev2_sa_t * sa)
109 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
112 static_always_inline int
113 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
115 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
116 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
117 return len + sizeof (ikev2_non_esp_marker);
120 static ikev2_sa_transform_t *
121 ikev2_find_transform_data (ikev2_sa_transform_t * t)
123 ikev2_main_t *km = &ikev2_main;
124 ikev2_sa_transform_t *td;
126 vec_foreach (td, km->supported_transforms)
128 if (td->type != t->type)
131 if (td->transform_id != t->transform_id)
134 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
136 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
137 || t->attrs[1] != 14)
140 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
148 static ikev2_sa_proposal_t *
149 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
150 ikev2_protocol_id_t prot_id)
152 ikev2_sa_proposal_t *rv = 0;
153 ikev2_sa_proposal_t *proposal;
154 ikev2_sa_transform_t *transform, *new_t;
155 u8 mandatory_bitmap, optional_bitmap;
157 if (prot_id == IKEV2_PROTOCOL_IKE)
159 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
160 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
161 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
163 else if (prot_id == IKEV2_PROTOCOL_ESP)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
166 (1 << IKEV2_TRANSFORM_TYPE_ESN);
167 optional_bitmap = mandatory_bitmap |
168 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
170 else if (prot_id == IKEV2_PROTOCOL_AH)
172 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
173 (1 << IKEV2_TRANSFORM_TYPE_ESN);
174 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
179 vec_add2 (rv, proposal, 1);
181 vec_foreach (proposal, proposals)
184 if (proposal->protocol_id != prot_id)
187 vec_foreach (transform, proposal->transforms)
189 if ((1 << transform->type) & bitmap)
192 if (ikev2_find_transform_data (transform))
194 bitmap |= 1 << transform->type;
195 vec_add2 (rv->transforms, new_t, 1);
196 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
197 new_t->attrs = vec_dup (transform->attrs);
201 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
202 (bitmap & ~optional_bitmap) == 0)
204 rv->proposal_num = proposal->proposal_num;
205 rv->protocol_id = proposal->protocol_id;
206 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
211 vec_free (rv->transforms);
220 ikev2_sa_transform_t *
221 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
222 ikev2_transform_type_t type)
224 ikev2_sa_transform_t *t;
229 vec_foreach (t, p->transforms)
232 return ikev2_find_transform_data (t);
238 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
242 vec_foreach (c, sa->childs)
244 ikev2_sa_proposal_t *proposal =
245 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
246 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
254 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
256 ikev2_sa_proposal_t *p;
257 ikev2_sa_transform_t *t;
264 vec_foreach (t, p->transforms)
268 vec_free (p->transforms);
274 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
276 ikev2_sa_free_proposal_vector (&c->r_proposals);
277 ikev2_sa_free_proposal_vector (&c->i_proposals);
287 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
290 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
296 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
298 ikev2_sa_free_child_sa (child);
299 vec_del1 (sa->childs, child - sa->childs);
303 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
305 vec_free (sa->i_nonce);
306 vec_free (sa->r_nonce);
308 vec_free (sa->dh_shared_key);
309 vec_free (sa->dh_private_key);
310 vec_free (sa->i_dh_data);
311 vec_free (sa->r_dh_data);
313 ikev2_sa_free_proposal_vector (&sa->r_proposals);
314 ikev2_sa_free_proposal_vector (&sa->i_proposals);
317 vec_free (sa->sk_ai);
318 vec_free (sa->sk_ar);
319 vec_free (sa->sk_ei);
320 vec_free (sa->sk_er);
321 vec_free (sa->sk_pi);
322 vec_free (sa->sk_pr);
324 vec_free (sa->i_id.data);
325 vec_free (sa->r_id.data);
327 vec_free (sa->i_auth.data);
329 EVP_PKEY_free (sa->i_auth.key);
330 vec_free (sa->r_auth.data);
332 EVP_PKEY_free (sa->r_auth.key);
336 vec_free (sa->rekey);
338 vec_free (sa->last_sa_init_req_packet_data);
339 vec_free (sa->last_sa_init_res_packet_data);
341 vec_free (sa->last_res_packet_data);
343 ikev2_sa_free_all_child_sa (&sa->childs);
347 ikev2_delete_sa (ikev2_sa_t * sa)
349 ikev2_main_t *km = &ikev2_main;
350 u32 thread_index = vlib_get_thread_index ();
353 ikev2_sa_free_all_vec (sa);
355 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
358 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
359 pool_put (km->per_thread_data[thread_index].sas, sa);
364 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
366 ikev2_sa_transform_t *t = 0, *t2;
367 ikev2_main_t *km = &ikev2_main;
369 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
374 /* check if received DH group is on our list of supported groups */
375 vec_foreach (t2, km->supported_transforms)
377 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
386 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
390 if (sa->is_initiator)
393 RAND_bytes ((u8 *) & sa->ispi, 8);
396 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
397 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
402 RAND_bytes ((u8 *) & sa->rspi, 8);
405 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
406 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
409 /* generate dh keys */
410 ikev2_generate_dh (sa, t);
415 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
417 ikev2_sa_transform_t *t = 0, *t2;
418 ikev2_main_t *km = &ikev2_main;
420 /*move some data to the new SA */
421 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
422 sa->i_nonce = _(sai->i_nonce);
423 sa->i_dh_data = _(sai->i_dh_data);
424 sa->dh_private_key = _(sai->dh_private_key);
425 ip_address_copy (&sa->iaddr, &sai->iaddr);
426 ip_address_copy (&sa->raddr, &sai->raddr);
427 sa->is_initiator = sai->is_initiator;
428 sa->i_id.type = sai->i_id.type;
429 sa->r_id.type = sai->r_id.type;
430 sa->profile_index = sai->profile_index;
431 sa->tun_itf = sai->tun_itf;
432 sa->is_tun_itf_set = sai->is_tun_itf_set;
433 sa->i_id.data = _(sai->i_id.data);
434 sa->r_id.data = _(sai->r_id.data);
435 sa->i_auth.method = sai->i_auth.method;
436 sa->i_auth.hex = sai->i_auth.hex;
437 sa->i_auth.data = _(sai->i_auth.data);
438 sa->i_auth.key = _(sai->i_auth.key);
439 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
440 sa->childs = _(sai->childs);
441 sa->udp_encap = sai->udp_encap;
442 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
443 sa->dst_port = sai->dst_port;
444 sa->sw_if_index = sai->sw_if_index;
448 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
453 /* check if received DH group is on our list of supported groups */
454 vec_foreach (t2, km->supported_transforms)
456 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
465 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
470 /* generate dh keys */
471 ikev2_complete_dh (sa, t);
476 ikev2_calc_keys (ikev2_sa_t * sa)
479 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
482 u16 integ_key_len = 0, salt_len = 0;
483 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
485 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
487 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
489 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
492 integ_key_len = tr_integ->key_len;
494 salt_len = sizeof (u32);
496 vec_append (s, sa->i_nonce);
497 vec_append (s, sa->r_nonce);
498 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
500 /* Calculate S = Ni | Nr | SPIi | SPIr */
502 vec_add2 (s, tmp, 2 * sizeof (*spi));
504 spi[0] = clib_host_to_net_u64 (sa->ispi);
505 spi[1] = clib_host_to_net_u64 (sa->rspi);
507 /* calculate PRFplus */
509 int len = tr_prf->key_trunc + /* SK_d */
510 integ_key_len * 2 + /* SK_ai, SK_ar */
511 tr_encr->key_len * 2 + /* SK_ei, SK_er */
512 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
515 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
522 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
523 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
524 pos += tr_prf->key_trunc;
529 sa->sk_ai = vec_new (u8, integ_key_len);
530 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
531 pos += integ_key_len;
534 sa->sk_ar = vec_new (u8, integ_key_len);
535 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
536 pos += integ_key_len;
540 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
541 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
542 pos += tr_encr->key_len + salt_len;
545 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
546 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
547 pos += tr_encr->key_len + salt_len;
550 sa->sk_pi = vec_new (u8, tr_prf->key_len);
551 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
552 pos += tr_prf->key_len;
555 sa->sk_pr = vec_new (u8, tr_prf->key_len);
556 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
557 pos += tr_prf->key_len;
560 sa->keys_generated = 1;
564 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
567 u16 integ_key_len = 0;
570 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
572 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
574 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
576 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
579 integ_key_len = ctr_integ->key_len;
581 salt_len = sizeof (u32);
583 vec_append (s, sa->i_nonce);
584 vec_append (s, sa->r_nonce);
585 /* calculate PRFplus */
587 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
589 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
594 child->sk_ei = vec_new (u8, ctr_encr->key_len);
595 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
596 pos += ctr_encr->key_len;
601 child->sk_ai = vec_new (u8, ctr_integ->key_len);
602 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
603 pos += ctr_integ->key_len;
607 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
612 child->sk_er = vec_new (u8, ctr_encr->key_len);
613 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
614 pos += ctr_encr->key_len;
619 child->sk_ar = vec_new (u8, integ_key_len);
620 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
621 pos += integ_key_len;
625 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
634 static_always_inline u8 *
635 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
637 const u32 max_buf_size =
638 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
639 u8 buf[max_buf_size];
640 u8 *res = vec_new (u8, 20);
642 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
643 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
644 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
645 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
646 SHA1 (buf, sizeof (buf), res);
651 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
654 const ike_ke_payload_header_t *ke = p;
655 u16 plen = clib_net_to_host_u16 (ke->length);
656 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
657 if (sizeof (*ke) > rlen)
660 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
661 vec_reset_length (ke_data[0]);
662 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
667 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
669 const ike_payload_header_t *ikep = p;
670 u16 plen = clib_net_to_host_u16 (ikep->length);
671 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
672 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
677 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
680 if (sizeof (*ikep) > rlen)
682 *plen = clib_net_to_host_u16 (ikep->length);
683 if (*plen < sizeof (*ikep) || *plen > rlen)
689 ikev2_process_sa_init_req (vlib_main_t * vm,
690 ikev2_sa_t * sa, ike_header_t * ike,
691 udp_header_t * udp, u32 len)
693 u8 nonce[IKEV2_NONCE_SIZE];
695 u8 payload = ike->nextpayload;
696 ike_payload_header_t *ikep;
699 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
700 "from ", clib_net_to_host_u64 (ike->ispi),
701 clib_net_to_host_u64 (ike->rspi),
702 ip_addr_v4 (&sa->iaddr).as_u32,
703 ip_addr_version (&sa->iaddr) == AF_IP4);
705 sa->ispi = clib_net_to_host_u64 (ike->ispi);
707 /* store whole IKE payload - needed for PSK auth */
708 vec_reset_length (sa->last_sa_init_req_packet_data);
709 vec_add (sa->last_sa_init_req_packet_data, ike, len);
711 if (len < sizeof (*ike))
714 len -= sizeof (*ike);
715 while (p < len && payload != IKEV2_PAYLOAD_NONE)
717 ikep = (ike_payload_header_t *) & ike->payload[p];
718 int current_length = len - p;
719 if (!ikev2_check_payload_length (ikep, current_length, &plen))
722 if (payload == IKEV2_PAYLOAD_SA)
724 ikev2_sa_free_proposal_vector (&sa->i_proposals);
725 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
727 else if (payload == IKEV2_PAYLOAD_KE)
729 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
733 else if (payload == IKEV2_PAYLOAD_NONCE)
735 vec_reset_length (sa->i_nonce);
736 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
737 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
739 else if (payload == IKEV2_PAYLOAD_NOTIFY)
742 ikev2_parse_notify_payload (ikep, current_length);
743 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
745 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
747 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
750 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
751 " behind NAT", sa->ispi);
755 else if (n->msg_type ==
756 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
758 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
760 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
763 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
764 " (self) behind NAT", sa->ispi);
770 else if (payload == IKEV2_PAYLOAD_VENDOR)
772 ikev2_parse_vendor_payload (ikep);
776 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
778 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
780 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
781 sa->unsupported_cp = payload;
786 payload = ikep->nextpayload;
790 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
795 ikev2_process_sa_init_resp (vlib_main_t * vm,
796 ikev2_sa_t * sa, ike_header_t * ike,
797 udp_header_t * udp, u32 len)
799 u8 nonce[IKEV2_NONCE_SIZE];
801 u8 payload = ike->nextpayload;
802 ike_payload_header_t *ikep;
805 sa->ispi = clib_net_to_host_u64 (ike->ispi);
806 sa->rspi = clib_net_to_host_u64 (ike->rspi);
808 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
809 "from ", sa->ispi, sa->rspi,
810 ip_addr_v4 (&sa->raddr).as_u32,
811 ip_addr_version (&sa->raddr) == AF_IP4);
813 /* store whole IKE payload - needed for PSK auth */
814 vec_reset_length (sa->last_sa_init_res_packet_data);
815 vec_add (sa->last_sa_init_res_packet_data, ike, len);
817 if (sizeof (*ike) > len)
820 len -= sizeof (*ike);
821 while (p < len && payload != IKEV2_PAYLOAD_NONE)
823 int current_length = len - p;
824 ikep = (ike_payload_header_t *) & ike->payload[p];
825 if (!ikev2_check_payload_length (ikep, current_length, &plen))
828 if (payload == IKEV2_PAYLOAD_SA)
830 ikev2_sa_free_proposal_vector (&sa->r_proposals);
831 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
834 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
836 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
839 else if (payload == IKEV2_PAYLOAD_KE)
841 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
845 else if (payload == IKEV2_PAYLOAD_NONCE)
847 vec_reset_length (sa->r_nonce);
848 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
849 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
851 else if (payload == IKEV2_PAYLOAD_NOTIFY)
854 ikev2_parse_notify_payload (ikep, current_length);
855 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
857 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
860 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
862 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
863 " behind NAT, unsupported", sa->ispi);
867 else if (n->msg_type ==
868 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
870 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
873 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
876 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
877 " (self) behind NAT", sa->ispi);
883 else if (payload == IKEV2_PAYLOAD_VENDOR)
885 ikev2_parse_vendor_payload (ikep);
889 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
891 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
893 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
894 sa->unsupported_cp = payload;
899 payload = ikep->nextpayload;
905 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
906 u8 * payload, u32 rlen, u32 * out_len)
908 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
910 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
911 ike_payload_header_t *ikep = 0;
914 ikev2_sa_transform_t *tr_integ;
915 ikev2_sa_transform_t *tr_encr;
917 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
919 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
920 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
922 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
925 if (rlen <= sizeof (*ike))
928 int len = rlen - sizeof (*ike);
930 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
932 ikep = (ike_payload_header_t *) & ike->payload[p];
933 int current_length = len - p;
934 if (!ikev2_check_payload_length (ikep, current_length, &plen))
937 if (*payload == IKEV2_PAYLOAD_SK)
939 last_payload = *payload;
943 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
945 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
947 sa->unsupported_cp = *payload;
952 *payload = ikep->nextpayload;
956 if (last_payload != IKEV2_PAYLOAD_SK)
958 ikev2_elog_error ("Last payload must be SK");
964 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
967 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
968 u8 *aad = (u8 *) ike;
969 u32 aad_len = ikep->payload - aad;
970 u8 *tag = ikep->payload + plen;
972 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
973 plen, aad, aad_len, tag, &dlen);
977 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
982 if (rlen < tr_integ->key_trunc)
986 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
987 (u8 *) ike, rlen - tr_integ->key_trunc);
989 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
992 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
994 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
996 ikev2_elog_error ("message integrity check failed");
1002 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1007 plaintext = ikep->payload + tr_encr->block_size;
1014 static_always_inline int
1015 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1017 if (i1->type != i2->type)
1020 if (vec_len (i1->data) != vec_len (i2->data))
1023 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1030 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
1032 ikev2_main_t *km = &ikev2_main;
1035 ikev2_child_sa_t *c;
1036 u32 thread_index = vlib_get_thread_index ();
1038 if (!sa->initial_contact)
1041 /* find old IKE SAs with the same authenticated identity */
1043 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
1044 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1045 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1048 if (sa->rspi != tmp->rspi)
1049 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
1053 for (i = 0; i < vec_len (delete); i++)
1056 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
1058 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
1060 ikev2_delete_sa (tmp);
1064 sa->initial_contact = 0;
1068 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1070 const ike_id_payload_header_t *id = p;
1071 u16 plen = clib_net_to_host_u16 (id->length);
1072 if (plen < sizeof (*id) || plen > rlen)
1075 sa_id->type = id->id_type;
1076 vec_reset_length (sa_id->data);
1077 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1083 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1085 const ike_auth_payload_header_t *ah = p;
1086 u16 plen = clib_net_to_host_u16 (ah->length);
1088 a->method = ah->auth_method;
1089 vec_reset_length (a->data);
1090 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1095 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1096 ike_header_t * ike, u32 len)
1099 ikev2_child_sa_t *first_child_sa;
1100 u8 payload = ike->nextpayload;
1102 ike_payload_header_t *ikep;
1106 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1107 "from ", clib_host_to_net_u64 (ike->ispi),
1108 clib_host_to_net_u64 (ike->rspi),
1110 ip_addr_v4 (&sa->raddr).as_u32 :
1111 ip_addr_v4 (&sa->iaddr).as_u32,
1112 ip_addr_version (&sa->raddr) == AF_IP4);
1114 ikev2_calc_keys (sa);
1116 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1120 if (sa->unsupported_cp)
1122 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1128 /* select or create 1st child SA */
1129 if (sa->is_initiator)
1131 first_child_sa = &sa->childs[0];
1135 ikev2_sa_free_all_child_sa (&sa->childs);
1136 vec_add2 (sa->childs, first_child_sa, 1);
1140 /* process encrypted payload */
1141 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1143 ikep = (ike_payload_header_t *) & plaintext[p];
1144 int current_length = dlen - p;
1145 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1148 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1150 if (sa->is_initiator)
1152 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1153 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1158 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1159 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1163 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1165 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1168 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1170 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1173 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1175 if (sa->is_initiator)
1177 if (!ikev2_parse_auth_payload (ikep, current_length,
1183 if (!ikev2_parse_auth_payload (ikep, current_length,
1188 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1191 ikev2_parse_notify_payload (ikep, current_length);
1192 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1194 sa->initial_contact = 1;
1198 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1200 ikev2_parse_vendor_payload (ikep);
1202 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1204 vec_free (first_child_sa->tsi);
1205 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1207 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1209 vec_free (first_child_sa->tsr);
1210 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1214 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1217 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1219 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1220 sa->unsupported_cp = payload;
1225 payload = ikep->nextpayload;
1232 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1237 ikev2_process_informational_req (vlib_main_t * vm,
1238 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1241 u8 payload = ike->nextpayload;
1243 ike_payload_header_t *ikep;
1245 ikev2_notify_t *n = 0;
1247 sa->liveness_retries = 0;
1248 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1249 "from ", clib_host_to_net_u64 (ike->ispi),
1250 clib_host_to_net_u64 (ike->rspi),
1251 ip_addr_v4 (&sa->iaddr).as_u32,
1252 ip_addr_version (&sa->iaddr) == AF_IP4);
1254 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1259 /* process encrypted payload */
1261 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1263 u32 current_length = dlen - p;
1264 if (p + sizeof (*ikep) > dlen)
1267 ikep = (ike_payload_header_t *) & plaintext[p];
1268 u16 plen = clib_net_to_host_u16 (ikep->length);
1270 if (plen < sizeof (*ikep) || plen > current_length)
1273 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1275 n = ikev2_parse_notify_payload (ikep, current_length);
1278 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1279 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1282 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1284 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1286 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1288 ikev2_parse_vendor_payload (ikep);
1292 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1294 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1296 sa->unsupported_cp = payload;
1300 payload = ikep->nextpayload;
1307 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1308 ikev2_sa_t * sa, ike_header_t * ike,
1312 u8 payload = ike->nextpayload;
1315 u8 nonce[IKEV2_NONCE_SIZE];
1317 ike_payload_header_t *ikep;
1318 ikev2_notify_t *n = 0;
1319 ikev2_ts_t *tsi = 0;
1320 ikev2_ts_t *tsr = 0;
1321 ikev2_sa_proposal_t *proposal = 0;
1322 ikev2_child_sa_t *child_sa;
1326 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1327 "from ", clib_host_to_net_u64 (ike->ispi),
1328 clib_host_to_net_u64 (ike->rspi),
1329 ip_addr_v4 (&sa->raddr).as_u32,
1330 ip_addr_version (&sa->raddr) == AF_IP4);
1332 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1335 goto cleanup_and_exit;
1337 /* process encrypted payload */
1339 while (payload != IKEV2_PAYLOAD_NONE)
1341 ikep = (ike_payload_header_t *) & plaintext[p];
1342 int current_length = dlen - p;
1343 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1344 goto cleanup_and_exit;
1346 if (payload == IKEV2_PAYLOAD_SA)
1348 proposal = ikev2_parse_sa_payload (ikep, current_length);
1350 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1352 n = ikev2_parse_notify_payload (ikep, current_length);
1353 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1358 else if (payload == IKEV2_PAYLOAD_DELETE)
1360 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1362 else if (payload == IKEV2_PAYLOAD_VENDOR)
1364 ikev2_parse_vendor_payload (ikep);
1366 else if (payload == IKEV2_PAYLOAD_NONCE)
1368 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1370 else if (payload == IKEV2_PAYLOAD_TSI)
1372 tsi = ikev2_parse_ts_payload (ikep, current_length);
1374 else if (payload == IKEV2_PAYLOAD_TSR)
1376 tsr = ikev2_parse_ts_payload (ikep, current_length);
1380 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1382 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1384 sa->unsupported_cp = payload;
1385 goto cleanup_and_exit;
1388 payload = ikep->nextpayload;
1392 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1394 ikev2_rekey_t *rekey = &sa->rekey[0];
1395 rekey->protocol_id = proposal->protocol_id;
1397 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1398 rekey->i_proposal->spi = rekey->spi;
1399 rekey->r_proposal = proposal;
1403 vec_reset_length (sa->r_nonce);
1404 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1405 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1408 child_sa->rekey_retries = 0;
1413 ikev2_rekey_t *rekey;
1414 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1417 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1419 goto cleanup_and_exit;
1421 vec_add2 (sa->rekey, rekey, 1);
1422 rekey->protocol_id = n->protocol_id;
1423 rekey->spi = n->spi;
1424 rekey->i_proposal = proposal;
1426 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1430 vec_free (sa->i_nonce);
1431 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1432 /* generate new Nr */
1433 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1434 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1445 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1453 ikev2_sa_transform_t *tr_prf;
1456 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1462 nonce = sa->i_nonce;
1463 packet_data = sa->last_sa_init_res_packet_data;
1469 nonce = sa->r_nonce;
1470 packet_data = sa->last_sa_init_req_packet_data;
1473 data = vec_new (u8, 4);
1475 vec_append (data, id->data);
1477 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1478 vec_append (authmsg, packet_data);
1479 vec_append (authmsg, nonce);
1480 vec_append (authmsg, id_hash);
1488 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1490 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1491 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1492 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1493 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1500 ikev2_sa_match_ts (ikev2_sa_t * sa)
1502 ikev2_main_t *km = &ikev2_main;
1504 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1505 ikev2_id_t *id_rem, *id_loc;
1508 pool_foreach (p, km->profiles, ({
1510 if (sa->is_initiator)
1526 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1527 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1530 sa->profile_index = p - km->profiles;
1532 vec_foreach(ts, sa->childs[0].tsi)
1534 if (ikev2_ts_cmp(p_tsi, ts))
1536 vec_add1 (tsi, ts[0]);
1541 vec_foreach(ts, sa->childs[0].tsr)
1543 if (ikev2_ts_cmp(p_tsr, ts))
1545 vec_add1 (tsr, ts[0]);
1556 vec_free (sa->childs[0].tsi);
1557 vec_free (sa->childs[0].tsr);
1558 sa->childs[0].tsi = tsi;
1559 sa->childs[0].tsr = tsr;
1565 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1570 ikev2_sa_auth (ikev2_sa_t * sa)
1572 ikev2_main_t *km = &ikev2_main;
1573 ikev2_profile_t *p, *sel_p = 0;
1574 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1575 ikev2_sa_transform_t *tr_prf;
1578 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1580 /* only shared key and rsa signature */
1581 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1582 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1584 ikev2_elog_uint (IKEV2_LOG_ERROR,
1585 "unsupported authentication method %u",
1587 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1591 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1592 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1594 ikev2_id_t *id_rem, *id_loc;
1595 ikev2_auth_t *sa_auth;
1597 if (sa->is_initiator)
1601 sa_auth = &sa->r_auth;
1607 sa_auth = &sa->i_auth;
1611 pool_foreach (p, km->profiles, ({
1614 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1615 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1618 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1620 if (!p->auth.data ||
1621 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1624 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1625 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1627 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1629 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1636 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1638 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1641 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1643 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1656 sa->udp_encap = sel_p->udp_encap;
1657 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1661 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1663 if (!sa->is_initiator)
1665 vec_free (sa->r_id.data);
1666 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1667 sa->r_id.type = sel_p->loc_id.type;
1668 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1669 sa->i_id.type = sel_p->rem_id.type;
1671 /* generate our auth data */
1672 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1673 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1675 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1676 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1678 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1680 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1681 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1685 /* select transforms for 1st child sa */
1686 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1687 sa->childs[0].r_proposals =
1688 ikev2_select_proposal (sa->childs[0].i_proposals,
1689 IKEV2_PROTOCOL_ESP);
1691 if (~0 != sel_p->tun_itf)
1693 sa->is_tun_itf_set = 1;
1694 sa->tun_itf = sel_p->tun_itf;
1700 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1701 "profile found! ispi %lx", sa->ispi);
1702 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1710 ikev2_sa_auth_init (ikev2_sa_t * sa)
1712 ikev2_main_t *km = &ikev2_main;
1713 u8 *authmsg, *key_pad, *psk = 0;
1714 ikev2_sa_transform_t *tr_prf;
1717 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1719 /* only shared key and rsa signature */
1720 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1721 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1723 ikev2_elog_uint (IKEV2_LOG_ERROR,
1724 "unsupported authentication method %u",
1726 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1730 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1731 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1732 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1734 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1736 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1737 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1739 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1741 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1742 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1751 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1753 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1757 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1759 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1769 ipsec_sa_flags_t flags;
1772 ipsec_crypto_alg_t encr_type;
1773 ipsec_integ_alg_t integ_type;
1774 ip46_address_t local_ip;
1775 ip46_address_t remote_ip;
1776 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1778 u32 old_remote_sa_id;
1779 u16 ipsec_over_udp_port;
1782 } ikev2_add_ipsec_tunnel_args_t;
1785 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1787 ikev2_main_t *km = &ikev2_main;
1790 ip46_address_t zero_addr = ip46_address_initializer;
1792 if (~0 == a->sw_if_index)
1794 /* no tunnel associated with the SA/profile - create a new one */
1795 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1796 &a->local_ip, &a->remote_ip, 0,
1797 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1798 TUNNEL_MODE_P2P, &sw_if_index);
1800 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1802 if (hash_get (km->sw_if_indices, sw_if_index))
1803 /* interface is managed by IKE; proceed with updating SAs */
1806 hash_set1 (km->sw_if_indices, sw_if_index);
1810 sw_if_index = a->sw_if_index;
1811 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1816 ikev2_elog_uint (IKEV2_LOG_ERROR,
1817 "installing ipip tunnel failed! local spi: %x",
1823 vec_add1 (sas_in, a->remote_sa_id);
1826 ipsec_tun_protect_del (sw_if_index, NULL);
1828 /* replace local SA immediately */
1829 ipsec_sa_unlock_id (a->local_sa_id);
1831 /* keep the old sa */
1832 vec_add1 (sas_in, a->old_remote_sa_id);
1835 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1837 IPSEC_PROTOCOL_ESP, a->encr_type,
1838 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1839 a->flags, 0, a->salt_local, &zero_addr,
1840 &zero_addr, NULL, a->src_port, a->dst_port);
1841 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1842 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1843 a->integ_type, &a->rem_ikey,
1844 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1845 a->salt_remote, &zero_addr,
1846 &zero_addr, NULL, a->ipsec_over_udp_port,
1847 a->ipsec_over_udp_port);
1849 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1853 ikev2_create_tunnel_interface (vlib_main_t * vm,
1855 ikev2_child_sa_t * child, u32 sa_index,
1856 u32 child_index, u8 is_rekey)
1858 u32 thread_index = vlib_get_thread_index ();
1859 ikev2_main_t *km = &ikev2_main;
1860 ipsec_crypto_alg_t encr_type;
1861 ipsec_integ_alg_t integ_type;
1862 ikev2_profile_t *p = 0;
1863 ikev2_sa_transform_t *tr;
1864 ikev2_sa_proposal_t *proposals;
1866 ikev2_add_ipsec_tunnel_args_t a;
1868 clib_memset (&a, 0, sizeof (a));
1870 if (!child->r_proposals)
1872 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1876 if (sa->is_initiator)
1878 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1879 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1880 proposals = child->r_proposals;
1881 a.local_spi = child->r_proposals[0].spi;
1882 a.remote_spi = child->i_proposals[0].spi;
1886 ip_address_to_46 (&sa->raddr, &a.local_ip);
1887 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1888 proposals = child->i_proposals;
1889 a.local_spi = child->i_proposals[0].spi;
1890 a.remote_spi = child->r_proposals[0].spi;
1893 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1896 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1897 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1900 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1901 a.is_rekey = is_rekey;
1903 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1904 if (tr && tr->esn_type)
1905 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1907 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1910 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1912 switch (tr->key_len)
1915 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1918 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1921 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1924 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1929 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1932 switch (tr->key_len)
1935 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1938 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1941 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1944 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1952 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1958 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1961 a.encr_type = encr_type;
1965 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1968 switch (tr->integ_type)
1970 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1971 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1973 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1974 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1976 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1977 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1979 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1980 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1983 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1989 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1995 integ_type = IPSEC_INTEG_ALG_NONE;
1998 a.integ_type = integ_type;
1999 ikev2_calc_child_keys (sa, child);
2001 if (sa->is_initiator)
2003 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2004 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2005 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2006 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2009 a.salt_remote = child->salt_er;
2010 a.salt_local = child->salt_ei;
2012 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2016 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2017 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2018 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2019 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2022 a.salt_remote = child->salt_ei;
2023 a.salt_local = child->salt_er;
2025 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
2026 a.src_port = sa->ipsec_over_udp_port;
2029 if (sa->is_initiator && sa->profile_index != ~0)
2030 p = pool_elt_at_index (km->profiles, sa->profile_index);
2032 if (p && p->lifetime)
2034 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2035 if (p->lifetime_jitter)
2037 // This is not much better than rand(3), which Coverity warns
2038 // is unsuitable for security applications; random_u32 is
2039 // however fast. If this perturbance to the expiration time
2040 // needs to use a better RNG then we may need to use something
2041 // like /dev/urandom which has significant overhead.
2042 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2043 rnd = random_u32 (&rnd);
2045 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2049 if (thread_index & 0xffffffc0)
2050 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2052 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2053 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2055 child->local_sa_id =
2057 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2059 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2064 /* create a new remote SA ID to keep the old SA for a bit longer
2065 * so the peer has some time to swap their SAs */
2067 /* use most significat bit of child index part in id */
2069 if (sa->current_remote_id_mask)
2071 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2072 sa->current_remote_id_mask = 0;
2076 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2077 sa->current_remote_id_mask = mask;
2078 remote_sa_id |= mask;
2080 sa->old_id_expiration = 3.0;
2081 sa->old_remote_id_present = 1;
2084 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2086 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2087 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2089 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2090 (u8 *) & a, sizeof (a));
2096 ip46_address_t local_ip;
2097 ip46_address_t remote_ip;
2101 } ikev2_del_ipsec_tunnel_args_t;
2103 static_always_inline u32
2104 ikev2_flip_alternate_sa_bit (u32 id)
2113 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2115 ikev2_main_t *km = &ikev2_main;
2116 ipip_tunnel_t *ipip = NULL;
2119 if (~0 == a->sw_if_index)
2122 ipip_tunnel_key_t key = {
2124 .dst = a->remote_ip,
2125 .transport = IPIP_TRANSPORT_IP4,
2130 ipip = ipip_tunnel_db_find (&key);
2134 sw_if_index = ipip->sw_if_index;
2135 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2142 sw_if_index = a->sw_if_index;
2143 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2146 if (~0 != sw_if_index)
2147 ipsec_tun_protect_del (sw_if_index, NULL);
2149 ipsec_sa_unlock_id (a->remote_sa_id);
2150 ipsec_sa_unlock_id (a->local_sa_id);
2151 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2154 ipip_del_tunnel (ipip->sw_if_index);
2158 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2159 ikev2_child_sa_t * child)
2161 ikev2_del_ipsec_tunnel_args_t a;
2163 clib_memset (&a, 0, sizeof (a));
2165 if (sa->is_initiator)
2167 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2168 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2172 ip_address_to_46 (&sa->raddr, &a.local_ip);
2173 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2176 a.remote_sa_id = child->remote_sa_id;
2177 a.local_sa_id = child->local_sa_id;
2178 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2180 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2186 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2187 ike_header_t * ike, void *user, udp_header_t * udp)
2189 ikev2_main_t *km = &ikev2_main;
2190 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2192 ike_payload_header_t *ph;
2196 ikev2_sa_transform_t *tr_encr, *tr_integ;
2198 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2200 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2202 ikev2_payload_chain_t *chain = 0;
2203 ikev2_payload_new_chain (chain);
2205 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2207 if (sa->r_proposals == 0)
2209 ikev2_payload_add_notify (chain,
2210 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2211 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2213 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2215 u8 *data = vec_new (u8, 2);
2216 ikev2_sa_transform_t *tr_dh;
2218 ikev2_sa_get_td_for_type (sa->r_proposals,
2219 IKEV2_TRANSFORM_TYPE_DH);
2220 ASSERT (tr_dh && tr_dh->dh_type);
2222 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2223 data[1] = (tr_dh->dh_type) & 0xff;
2225 ikev2_payload_add_notify (chain,
2226 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2229 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2231 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2233 u8 *data = vec_new (u8, 1);
2235 data[0] = sa->unsupported_cp;
2236 ikev2_payload_add_notify (chain,
2237 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2245 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2246 ikev2_payload_add_sa (chain, sa->r_proposals);
2247 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2248 ikev2_payload_add_nonce (chain, sa->r_nonce);
2250 u8 *nat_detection_sha1 =
2251 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2252 clib_host_to_net_u64 (sa->rspi),
2253 &sa->raddr, udp->dst_port);
2254 ikev2_payload_add_notify (chain,
2255 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2256 nat_detection_sha1);
2257 vec_free (nat_detection_sha1);
2258 nat_detection_sha1 =
2259 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2260 clib_host_to_net_u64 (sa->rspi),
2261 &sa->iaddr, udp->src_port);
2262 ikev2_payload_add_notify (chain,
2263 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2264 nat_detection_sha1);
2265 vec_free (nat_detection_sha1);
2268 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2270 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2272 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2273 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2274 ikev2_payload_add_auth (chain, &sa->r_auth);
2275 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2276 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2277 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2279 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2281 ikev2_payload_add_notify (chain,
2282 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2284 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2286 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2288 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2290 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2291 ikev2_payload_add_auth (chain, &sa->r_auth);
2293 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2295 ikev2_payload_add_notify (chain,
2296 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2297 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2298 ikev2_payload_add_auth (chain, &sa->r_auth);
2299 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2300 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2302 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2304 u8 *data = vec_new (u8, 1);
2306 data[0] = sa->unsupported_cp;
2307 ikev2_payload_add_notify (chain,
2308 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2312 else if (sa->state == IKEV2_STATE_SA_INIT)
2314 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2315 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2316 ikev2_payload_add_auth (chain, &sa->i_auth);
2317 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2318 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2319 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2320 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2325 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2329 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2331 /* if pending delete */
2334 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2336 if (sa->is_initiator)
2337 ikev2_payload_add_delete (chain, sa->del);
2339 /* The response to a request that deletes the IKE SA is an empty
2340 INFORMATIONAL response. */
2341 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2343 /* The response to a request that deletes ESP or AH SAs will contain
2344 delete payloads for the paired SAs going in the other direction. */
2347 ikev2_payload_add_delete (chain, sa->del);
2352 /* received N(AUTHENTICATION_FAILED) */
2353 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2355 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2358 /* received unsupported critical payload */
2359 else if (sa->unsupported_cp)
2361 u8 *data = vec_new (u8, 1);
2363 data[0] = sa->unsupported_cp;
2364 ikev2_payload_add_notify (chain,
2365 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2368 sa->unsupported_cp = 0;
2370 /* else send empty response */
2372 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2374 if (sa->is_initiator)
2377 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2378 ikev2_notify_t notify;
2379 u8 *data = vec_new (u8, 4);
2380 clib_memset (¬ify, 0, sizeof (notify));
2381 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2382 notify.spi = sa->childs[0].i_proposals->spi;
2383 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2385 ikev2_payload_add_sa (chain, proposals);
2386 ikev2_payload_add_nonce (chain, sa->i_nonce);
2387 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2388 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2389 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2396 if (vec_len (sa->rekey) > 0)
2398 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2399 ikev2_payload_add_nonce (chain, sa->r_nonce);
2400 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2402 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2404 vec_del1 (sa->rekey, 0);
2406 else if (sa->unsupported_cp)
2408 u8 *data = vec_new (u8, 1);
2410 data[0] = sa->unsupported_cp;
2411 ikev2_payload_add_notify (chain,
2412 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2415 sa->unsupported_cp = 0;
2419 ikev2_payload_add_notify (chain,
2420 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2427 ike->version = IKE_VERSION_2;
2428 ike->nextpayload = IKEV2_PAYLOAD_SK;
2429 tlen = sizeof (*ike);
2430 if (sa->is_initiator)
2432 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2433 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2437 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2441 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2443 tlen += vec_len (chain->data);
2444 ike->nextpayload = chain->first_payload_type;
2445 ike->length = clib_host_to_net_u32 (tlen);
2447 if (tlen + b->current_length + b->current_data > buffer_data_size)
2453 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2455 /* store whole IKE payload - needed for PSK auth */
2456 vec_reset_length (sa->last_sa_init_res_packet_data);
2457 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2461 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2462 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2465 plen = sizeof (*ph);
2466 ph = (ike_payload_header_t *) & ike->payload[0];
2467 ph->nextpayload = chain->first_payload_type;
2470 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2471 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2472 plen += vec_len (chain->data) + iv_len;
2474 /* add space for hmac/tag */
2476 plen += tr_integ->key_trunc;
2478 plen += IKEV2_GCM_ICV_SIZE;
2481 if (tlen + b->current_length + b->current_data > buffer_data_size)
2487 /* payload and total length */
2488 ph->length = clib_host_to_net_u16 (plen);
2489 ike->length = clib_host_to_net_u32 (tlen);
2493 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2494 ph->payload, (u8 *) ike,
2495 sizeof (*ike) + sizeof (*ph),
2496 ph->payload + plen - sizeof (*ph) -
2497 IKEV2_GCM_ICV_SIZE))
2505 if (!ikev2_encrypt_data
2506 (ptd, sa, tr_encr, chain->data, ph->payload))
2512 ikev2_calc_integr (tr_integ,
2513 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2514 (u8 *) ike, tlen - tr_integ->key_trunc);
2515 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2516 sizeof (*ike), integ, tr_integ->key_trunc);
2519 /* store whole IKE payload - needed for retransmit */
2520 vec_reset_length (sa->last_res_packet_data);
2521 vec_add (sa->last_res_packet_data, ike, tlen);
2525 ikev2_payload_destroy_chain (chain);
2531 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2532 ip_address_t raddr, u32 rlen)
2535 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2538 pool_foreach (sa, ptd->sas, ({
2539 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2540 !ip_address_cmp(&sa->iaddr, &iaddr) &&
2541 !ip_address_cmp(&sa->raddr, &raddr))
2544 u8 payload = ike->nextpayload;
2546 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2547 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2548 u32 plen = clib_net_to_host_u16 (ikep->length);
2549 if (plen > p + sizeof (*ike))
2552 if (plen < sizeof(ike_payload_header_t))
2555 if (payload == IKEV2_PAYLOAD_NONCE)
2557 if (!clib_memcmp(sa->i_nonce, ikep->payload,
2558 plen - sizeof(*ikep)))
2560 /* req is retransmit */
2561 if (sa->state == IKEV2_STATE_SA_INIT)
2563 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2564 u32 slen = clib_net_to_host_u32(tmp->length);
2565 ike->ispi = tmp->ispi;
2566 ike->rspi = tmp->rspi;
2567 ike->nextpayload = tmp->nextpayload;
2568 ike->version = tmp->version;
2569 ike->exchange = tmp->exchange;
2570 ike->flags = tmp->flags;
2571 ike->msgid = tmp->msgid;
2572 ike->length = tmp->length;
2573 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2574 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2575 "ispi %lx IKE_SA_INIT retransmit "
2576 "from %d.%d.%d.%d to %d.%d.%d.%d",
2578 ip_addr_v4(&raddr).as_u32,
2579 ip_addr_v4 (&iaddr).as_u32);
2582 /* else ignore req */
2585 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2586 "ispi %lx IKE_SA_INIT ignore "
2587 "from %d.%d.%d.%d to %d.%d.%d.%d",
2589 ip_addr_v4(&raddr).as_u32,
2590 ip_addr_v4(&iaddr).as_u32);
2595 payload = ikep->nextpayload;
2602 /* req is not retransmit */
2607 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2609 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2612 if (msg_id > sa->last_msg_id)
2614 sa->last_msg_id = msg_id;
2618 /* retransmitted req */
2619 if (msg_id == sa->last_msg_id)
2621 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2622 u32 slen = clib_net_to_host_u32 (tmp->length);
2623 ike->ispi = tmp->ispi;
2624 ike->rspi = tmp->rspi;
2625 ike->nextpayload = tmp->nextpayload;
2626 ike->version = tmp->version;
2627 ike->exchange = tmp->exchange;
2628 ike->flags = tmp->flags;
2629 ike->msgid = tmp->msgid;
2630 ike->length = tmp->length;
2631 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2632 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2633 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2634 ip_addr_v4 (&sa->iaddr).as_u32);
2638 /* old req ignore */
2639 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2640 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2641 ip_addr_v4 (&sa->iaddr).as_u32);
2646 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2648 ikev2_main_t *km = &ikev2_main;
2649 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2650 sa->profile_index = ~0;
2654 ikev2_del_sa_init_from_main (u64 * ispi)
2656 ikev2_main_t *km = &ikev2_main;
2657 uword *p = hash_get (km->sa_by_ispi, *ispi);
2660 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2661 hash_unset (km->sa_by_ispi, sai->ispi);
2662 ikev2_sa_free_all_vec (sai);
2663 pool_put (km->sais, sai);
2668 ikev2_del_sa_init (u64 ispi)
2670 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2674 static_always_inline void
2675 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2677 if (sa->is_initiator)
2679 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2680 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2684 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2685 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2689 static_always_inline void
2690 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2692 if (sa->is_initiator)
2694 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2695 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2699 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2700 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2704 static_always_inline void
2705 ikev2_set_ip_address (ikev2_sa_t * sa, const void *src,
2706 const void *dst, const int af, const int is_initiator)
2708 const void *raddr = is_initiator ? src : dst;
2709 const void *iaddr = is_initiator ? dst : src;
2710 ip_address_set (&sa->raddr, raddr, af);
2711 ip_address_set (&sa->iaddr, iaddr, af);
2714 static_always_inline uword
2715 ikev2_node_internal (vlib_main_t * vm,
2716 vlib_node_runtime_t * node, vlib_frame_t * frame,
2719 u32 n_left = frame->n_vectors, *from;
2720 ikev2_main_t *km = &ikev2_main;
2721 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2722 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2723 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2726 from = vlib_frame_vector_args (frame);
2727 vlib_get_buffers (vm, from, bufs, n_left);
2732 vlib_buffer_t *b0 = b[0];
2733 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2734 : IKEV2_NEXT_IP6_ERROR_DROP;
2735 ip4_header_t *ip40 = 0;
2736 ip6_header_t *ip60 = 0;
2739 ikev2_sa_t *sa0 = 0;
2740 ikev2_sa_t sa; /* temporary store for SA */
2743 int is_req = 0, has_non_esp_marker = 0;
2745 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2747 u8 *ptr = vlib_buffer_get_current (b0);
2748 ip40 = (ip4_header_t *) ptr;
2749 ptr += sizeof (*ip40);
2750 udp0 = (udp_header_t *) ptr;
2751 ptr += sizeof (*udp0);
2752 ike0 = (ike_header_t *) ptr;
2753 ip_hdr_sz = sizeof (*ip40);
2757 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2758 ike0 = vlib_buffer_get_current (b0);
2759 vlib_buffer_advance (b0, -sizeof (*udp0));
2760 udp0 = vlib_buffer_get_current (b0);
2764 ip40 = (ip4_header_t *) ipx_hdr;
2765 ip_hdr_sz = sizeof (*ip40);
2769 ip60 = (ip6_header_t *) ipx_hdr;
2770 ip_hdr_sz = sizeof (*ip60);
2772 vlib_buffer_advance (b0, -ip_hdr_sz);
2775 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2777 /* check for non-esp marker */
2778 if (*((u32 *) ike0) == 0)
2781 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2782 rlen -= sizeof (ikev2_non_esp_marker);
2783 has_non_esp_marker = 1;
2786 if (clib_net_to_host_u32 (ike0->length) != rlen)
2788 vlib_node_increment_counter (vm, node->node_index,
2789 IKEV2_ERROR_BAD_LENGTH, 1);
2793 if (ike0->version != IKE_VERSION_2)
2795 vlib_node_increment_counter (vm, node->node_index,
2796 IKEV2_ERROR_NOT_IKEV2, 1);
2800 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2803 clib_memset (sa0, 0, sizeof (*sa0));
2805 u8 is_initiator = ike0->flags & IKEV2_HDR_FLAG_INITIATOR;
2808 if (ike0->rspi == 0)
2811 ikev2_set_ip_address (sa0, &ip40->dst_address,
2812 &ip40->src_address, AF_IP4,
2815 ikev2_set_ip_address (sa0, &ip60->dst_address,
2816 &ip60->src_address, AF_IP6,
2819 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2822 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2826 vlib_node_increment_counter (vm, node->node_index,
2829 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2831 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2836 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2838 vlib_node_increment_counter (vm, node->node_index,
2839 IKEV2_ERROR_MALFORMED_PACKET,
2842 if (sa0->state == IKEV2_STATE_SA_INIT)
2844 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2846 ikev2_select_proposal (sa0->i_proposals,
2847 IKEV2_PROTOCOL_IKE);
2848 ikev2_generate_sa_init_data (sa0);
2851 if (sa0->state == IKEV2_STATE_SA_INIT
2852 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2854 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2856 vlib_node_increment_counter (vm, node->node_index,
2857 IKEV2_ERROR_NO_BUFF_SPACE,
2861 if (sa0->state == IKEV2_STATE_SA_INIT)
2863 /* add SA to the pool */
2864 pool_get (ptd->sas, sa0);
2865 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2866 ikev2_init_sa (vm, sa0);
2867 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2871 ikev2_sa_free_all_vec (sa0);
2875 else //received sa_init without initiator flag
2878 ikev2_set_ip_address (sa0, &ip40->src_address,
2879 &ip40->dst_address, AF_IP4,
2882 ikev2_set_ip_address (sa0, &ip60->src_address,
2883 &ip60->dst_address, AF_IP6,
2886 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2888 if (sa0->state == IKEV2_STATE_SA_INIT)
2891 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2892 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2895 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2897 if (clib_atomic_bool_cmp_and_swap
2898 (&sai->init_response_received, 0, 1))
2900 ikev2_complete_sa_data (sa0, sai);
2901 ikev2_calc_keys (sa0);
2902 ikev2_sa_auth_init (sa0);
2904 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2906 vlib_node_increment_counter (vm,
2908 IKEV2_ERROR_NO_BUFF_SPACE,
2913 /* we've already processed sa-init response */
2914 sa0->state = IKEV2_STATE_UNKNOWN;
2919 if (sa0->state == IKEV2_STATE_SA_INIT)
2921 /* add SA to the pool */
2922 pool_get (ptd->sas, sa0);
2923 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2924 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2928 ikev2_sa_free_all_vec (sa0);
2932 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2935 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2938 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2939 slen = ikev2_retransmit_resp (sa0, ike0);
2942 vlib_node_increment_counter (vm, node->node_index,
2945 IKEV2_ERROR_IKE_REQ_IGNORE
2947 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2952 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2953 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
2955 ikev2_sa_auth (sa0);
2957 vlib_node_increment_counter (vm, node->node_index,
2958 IKEV2_ERROR_MALFORMED_PACKET, 1);
2959 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2961 ikev2_initial_contact_cleanup (sa0);
2962 ikev2_sa_match_ts (sa0);
2963 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2964 ikev2_create_tunnel_interface (vm, sa0,
2969 if (sa0->is_initiator)
2971 ikev2_del_sa_init (sa0->ispi);
2975 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2977 vlib_node_increment_counter (vm, node->node_index,
2978 IKEV2_ERROR_NO_BUFF_SPACE,
2983 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2986 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2989 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2990 slen = ikev2_retransmit_resp (sa0, ike0);
2993 vlib_node_increment_counter (vm, node->node_index,
2996 IKEV2_ERROR_IKE_REQ_IGNORE
2998 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3003 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3006 vlib_node_increment_counter (vm, node->node_index,
3007 IKEV2_ERROR_MALFORMED_PACKET,
3015 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3017 ikev2_delete_t *d, *tmp, *resp = 0;
3018 vec_foreach (d, sa0->del)
3020 ikev2_child_sa_t *ch_sa;
3021 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3023 !sa0->is_initiator);
3026 ikev2_delete_tunnel_interface (km->vnet_main,
3028 if (!sa0->is_initiator)
3030 vec_add2 (resp, tmp, 1);
3031 tmp->protocol_id = d->protocol_id;
3032 tmp->spi = ch_sa->r_proposals[0].spi;
3034 ikev2_sa_del_child_sa (sa0, ch_sa);
3037 if (!sa0->is_initiator)
3039 vec_free (sa0->del);
3044 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
3046 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
3047 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3049 vlib_node_increment_counter (vm, node->node_index,
3050 IKEV2_ERROR_NO_BUFF_SPACE,
3055 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3058 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3061 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3062 slen = ikev2_retransmit_resp (sa0, ike0);
3065 vlib_node_increment_counter (vm, node->node_index,
3068 IKEV2_ERROR_IKE_REQ_IGNORE
3070 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3075 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3078 vlib_node_increment_counter (vm, node->node_index,
3079 IKEV2_ERROR_MALFORMED_PACKET,
3087 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3090 ikev2_sa_free_all_child_sa (&sa0->childs);
3091 ikev2_child_sa_t *child;
3092 vec_add2 (sa0->childs, child, 1);
3093 clib_memset (child, 0, sizeof (*child));
3094 child->r_proposals = sa0->rekey[0].r_proposal;
3095 child->i_proposals = sa0->rekey[0].i_proposal;
3096 child->tsi = sa0->rekey[0].tsi;
3097 child->tsr = sa0->rekey[0].tsr;
3098 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3099 child - sa0->childs, 1);
3101 if (sa0->is_initiator)
3103 vec_free (sa0->rekey);
3107 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3109 vlib_node_increment_counter (vm, node->node_index,
3110 IKEV2_ERROR_NO_BUFF_SPACE,
3118 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
3119 "received from %d.%d.%d.%d to %d.%d.%d.%d",
3121 ip40->src_address.as_u32,
3122 ip40->dst_address.as_u32);
3126 /* if we are sending packet back, rewrite headers */
3127 if (slen && ~0 != slen)
3131 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3132 ikev2_rewrite_v4_addrs (sa0, ip40);
3136 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3137 ikev2_rewrite_v6_addrs (sa0, ip60);
3142 udp0->dst_port = udp0->src_port =
3143 clib_net_to_host_u16 (ikev2_get_port (sa0));
3145 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3148 if (!has_non_esp_marker)
3149 slen = ikev2_insert_non_esp_marker (ike0, slen);
3154 if (has_non_esp_marker)
3155 slen += sizeof (ikev2_non_esp_marker);
3157 u16 tp = udp0->dst_port;
3158 udp0->dst_port = udp0->src_port;
3159 udp0->src_port = tp;
3162 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3164 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3167 ip40->length = clib_host_to_net_u16 (b0->current_length);
3168 ip40->checksum = ip4_header_checksum (ip40);
3172 ip60->payload_length =
3173 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3177 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3178 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3180 ikev2_child_sa_t *c;
3182 vec_foreach (c, sa0->childs)
3183 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3185 ikev2_delete_sa (sa0);
3187 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3188 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3191 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3192 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3193 t->next_index = next[0];
3200 vlib_node_increment_counter (vm, node->node_index,
3201 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3202 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3203 return frame->n_vectors;
3207 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3209 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3213 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3215 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3219 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3220 .function = ikev2_ip4,
3221 .name = "ikev2-ip4",
3222 .vector_size = sizeof (u32),
3223 .format_trace = format_ikev2_trace,
3224 .type = VLIB_NODE_TYPE_INTERNAL,
3226 .n_errors = ARRAY_LEN(ikev2_error_strings),
3227 .error_strings = ikev2_error_strings,
3229 .n_next_nodes = IKEV2_IP4_N_NEXT,
3231 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3232 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3236 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3237 .function = ikev2_ip6,
3238 .name = "ikev2-ip6",
3239 .vector_size = sizeof (u32),
3240 .format_trace = format_ikev2_trace,
3241 .type = VLIB_NODE_TYPE_INTERNAL,
3243 .n_errors = ARRAY_LEN(ikev2_error_strings),
3244 .error_strings = ikev2_error_strings,
3246 .n_next_nodes = IKEV2_IP6_N_NEXT,
3248 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3249 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3254 // set ikev2 proposals when vpp is used as initiator
3255 static clib_error_t *
3256 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3257 ikev2_transforms_set * ts,
3258 ikev2_sa_proposal_t ** proposals, int is_ike)
3261 ikev2_main_t *km = &ikev2_main;
3262 ikev2_sa_proposal_t *proposal;
3263 vec_add2 (*proposals, proposal, 1);
3264 ikev2_sa_transform_t *td;
3269 vec_foreach (td, km->supported_transforms)
3271 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3272 && td->encr_type == ts->crypto_alg
3273 && td->key_len == ts->crypto_key_size / 8)
3276 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3277 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3278 vec_add (td->attrs, (u8 *) attr, 4);
3279 vec_add1 (proposal->transforms, *td);
3288 r = clib_error_return (0, "Unsupported algorithm");
3292 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3296 vec_foreach (td, km->supported_transforms)
3298 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3299 && td->integ_type == ts->integ_alg)
3301 vec_add1 (proposal->transforms, *td);
3309 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3310 r = clib_error_return (0, "Unsupported algorithm");
3319 vec_foreach (td, km->supported_transforms)
3321 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3322 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3324 vec_add1 (proposal->transforms, *td);
3331 r = clib_error_return (0, "Unsupported algorithm");
3340 vec_foreach (td, km->supported_transforms)
3342 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3344 vec_add1 (proposal->transforms, *td);
3347 sa->dh_group = td->dh_type;
3355 r = clib_error_return (0, "Unsupported algorithm");
3363 vec_foreach (td, km->supported_transforms)
3365 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3367 vec_add1 (proposal->transforms, *td);
3373 r = clib_error_return (0, "Unsupported algorithm");
3382 static ikev2_profile_t *
3383 ikev2_profile_index_by_name (u8 * name)
3385 ikev2_main_t *km = &ikev2_main;
3388 p = mhash_get (&km->profile_index_by_name, name);
3392 return pool_elt_at_index (km->profiles, p[0]);
3397 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3398 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3407 b0 = vlib_get_buffer (vm, bi0);
3408 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3409 udp0 = vlib_buffer_get_current (b0);
3410 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3411 udp0->src_port = clib_host_to_net_u16 (src_port);
3412 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3415 if (ip_addr_version (dst) == AF_IP4)
3417 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3418 ip40 = vlib_buffer_get_current (b0);
3419 ip40->ip_version_and_header_length = 0x45;
3421 ip40->fragment_id = 0;
3422 ip40->flags_and_fragment_offset = 0;
3424 ip40->protocol = IP_PROTOCOL_UDP;
3425 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3426 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3427 b0->current_length =
3428 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3429 ip40->length = clib_host_to_net_u16 (b0->current_length);
3430 ip40->checksum = ip4_header_checksum (ip40);
3434 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3435 ip60 = vlib_buffer_get_current (b0);
3437 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3438 ip60->ip_version_traffic_class_and_flow_label =
3439 clib_host_to_net_u32 (0x6 << 28);
3440 ip60->payload_length =
3441 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3442 ip60->protocol = IP_PROTOCOL_UDP;
3443 ip60->hop_limit = 0xff;
3444 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3445 sizeof (ip60->src_address));
3446 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3447 sizeof (ip60->src_address));
3450 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3451 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3452 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3454 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3455 ip4_lookup_node.index : ip6_lookup_node.index;
3457 /* send the request */
3458 f = vlib_get_frame_to_node (vm, next_index);
3459 to_next = vlib_frame_vector_args (f);
3462 vlib_put_frame_to_node (vm, next_index, f);
3467 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3470 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3475 *b = vlib_get_buffer (vm, bi0);
3480 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3482 ikev2_main_t *km = &ikev2_main;
3485 EVP_PKEY_free (km->pkey);
3486 km->pkey = ikev2_load_key_file (file);
3487 if (km->pkey == NULL)
3488 return clib_error_return (0, "load key '%s' failed", file);
3493 static_always_inline vnet_api_error_t
3494 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3496 ikev2_main_t *km = &ikev2_main;
3497 udp_dst_port_info_t *pi;
3499 uword *v = hash_get (km->udp_ports, port);
3500 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3504 /* IKE already uses this port, only increment reference counter */
3511 return VNET_API_ERROR_UDP_PORT_TAKEN;
3513 udp_register_dst_port (km->vlib_main, port,
3514 ipsec4_tun_input_node.index, 1);
3515 hash_set (km->udp_ports, port, 1);
3517 p->ipsec_over_udp_port = port;
3521 static_always_inline void
3522 ikev2_unregister_udp_port (ikev2_profile_t * p)
3524 ikev2_main_t *km = &ikev2_main;
3527 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3530 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3538 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3539 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3542 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3546 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3547 ikev2_main_per_thread_data_t * tkm,
3550 ikev2_main_t *km = &ikev2_main;
3551 ip_address_t *src, *dst;
3554 /* Create the Initiator notification for IKE SA removal */
3559 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3562 ikev2_log_error ("buffer alloc failure");
3566 ike0 = vlib_buffer_get_current (b0);
3567 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3568 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3569 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3570 vec_resize (sa->del, 1);
3571 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3572 sa->del->spi = sa->ispi;
3573 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3574 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3575 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3579 if (sa->is_initiator)
3590 ikev2_send_ike (vm, src, dst, bi0, len,
3591 ikev2_get_port (sa), sa->dst_port, 0);
3593 /* delete local SA */
3594 ikev2_child_sa_t *c;
3595 vec_foreach (c, sa->childs)
3596 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3598 u64 rspi = sa->rspi;
3599 ikev2_sa_free_all_vec (sa);
3600 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3603 hash_unset (tkm->sa_by_rspi, rspi);
3604 pool_put (tkm->sas, sa);
3609 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3611 ikev2_main_per_thread_data_t *tkm;
3613 u32 pi = p - km->profiles;
3618 pool_foreach(sa, km->sais, ({
3619 if (pi == sa->profile_index)
3620 vec_add1 (del_sai, sa - km->sais);
3624 vec_foreach (sai, del_sai)
3626 sa = pool_elt_at_index (km->sais, sai[0]);
3627 ikev2_sa_free_all_vec (sa);
3628 hash_unset (km->sa_by_ispi, sa->ispi);
3629 pool_put (km->sais, sa);
3631 vec_reset_length (del_sai);
3633 vec_foreach (tkm, km->per_thread_data)
3636 pool_foreach (sa, tkm->sas, ({
3637 if (sa->profile_index != ~0 && pi == sa->profile_index)
3638 vec_add1 (del_sai, sa - tkm->sas);
3642 vec_foreach (sai, del_sai)
3644 sa = pool_elt_at_index (tkm->sas, sai[0]);
3645 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3648 vec_reset_length (del_sai);
3655 ikev2_profile_free (ikev2_profile_t * p)
3659 vec_free (p->auth.data);
3661 EVP_PKEY_free (p->auth.key);
3663 vec_free (p->loc_id.data);
3664 vec_free (p->rem_id.data);
3668 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3670 ikev2_main_t *km = &ikev2_main;
3675 if (ikev2_profile_index_by_name (name))
3676 return clib_error_return (0, "policy %v already exists", name);
3678 pool_get (km->profiles, p);
3679 clib_memset (p, 0, sizeof (*p));
3680 p->name = vec_dup (name);
3681 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3682 p->responder.sw_if_index = ~0;
3684 uword index = p - km->profiles;
3685 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3689 p = ikev2_profile_index_by_name (name);
3691 return clib_error_return (0, "policy %v does not exists", name);
3693 ikev2_unregister_udp_port (p);
3694 ikev2_cleanup_profile_sessions (km, p);
3696 ikev2_profile_free (p);
3697 pool_put (km->profiles, p);
3698 mhash_unset (&km->profile_index_by_name, name, 0);
3704 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3705 u8 * auth_data, u8 data_hex_format)
3710 p = ikev2_profile_index_by_name (name);
3714 r = clib_error_return (0, "unknown profile %v", name);
3719 EVP_PKEY_free (p->auth.key);
3720 vec_free (p->auth.data);
3722 p->auth.method = auth_method;
3723 p->auth.data = vec_dup (auth_data);
3724 p->auth.hex = data_hex_format;
3726 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3728 vec_add1 (p->auth.data, 0);
3729 p->auth.key = ikev2_load_cert_file (p->auth.data);
3730 if (p->auth.key == NULL)
3731 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3738 ikev2_is_id_supported (u8 id_type)
3740 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3741 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3742 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3743 id_type == IKEV2_ID_TYPE_ID_FQDN);
3747 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3753 if (!ikev2_is_id_supported (id_type))
3755 r = clib_error_return (0, "unsupported identity type %U",
3756 format_ikev2_id_type, id_type);
3760 p = ikev2_profile_index_by_name (name);
3764 r = clib_error_return (0, "unknown profile %v", name);
3770 vec_free (p->loc_id.data);
3771 p->loc_id.type = id_type;
3772 p->loc_id.data = vec_dup (data);
3776 vec_free (p->rem_id.data);
3777 p->rem_id.type = id_type;
3778 p->rem_id.data = vec_dup (data);
3784 static_always_inline void
3785 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3787 if (ip_addr_version (addr) == AF_IP4)
3788 ts->ts_type = TS_IPV4_ADDR_RANGE;
3790 ts->ts_type = TS_IPV6_ADDR_RANGE;
3793 static_always_inline void
3794 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3795 const ip_address_t * end)
3797 ip_address_copy (&ts->start_addr, start);
3798 ip_address_copy (&ts->end_addr, end);
3802 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3803 u16 start_port, u16 end_port, ip_address_t start_addr,
3804 ip_address_t end_addr, int is_local)
3809 p = ikev2_profile_index_by_name (name);
3813 r = clib_error_return (0, "unknown profile %v", name);
3817 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3818 return clib_error_return (0, "IP address version mismatch!");
3822 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3823 p->loc_ts.start_port = start_port;
3824 p->loc_ts.end_port = end_port;
3825 p->loc_ts.protocol_id = protocol_id;
3826 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3830 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3831 p->rem_ts.start_port = start_port;
3832 p->rem_ts.end_port = end_port;
3833 p->rem_ts.protocol_id = protocol_id;
3834 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3842 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3843 u32 sw_if_index, ip_address_t addr)
3848 p = ikev2_profile_index_by_name (name);
3852 r = clib_error_return (0, "unknown profile %v", name);
3856 p->responder.sw_if_index = sw_if_index;
3857 ip_address_copy (&p->responder.addr, &addr);
3863 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3864 ikev2_transform_encr_type_t crypto_alg,
3865 ikev2_transform_integ_type_t integ_alg,
3866 ikev2_transform_dh_type_t dh_type,
3867 u32 crypto_key_size)
3872 p = ikev2_profile_index_by_name (name);
3876 r = clib_error_return (0, "unknown profile %v", name);
3880 p->ike_ts.crypto_alg = crypto_alg;
3881 p->ike_ts.integ_alg = integ_alg;
3882 p->ike_ts.dh_type = dh_type;
3883 p->ike_ts.crypto_key_size = crypto_key_size;
3888 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3889 ikev2_transform_encr_type_t crypto_alg,
3890 ikev2_transform_integ_type_t integ_alg,
3891 u32 crypto_key_size)
3896 p = ikev2_profile_index_by_name (name);
3900 r = clib_error_return (0, "unknown profile %v", name);
3904 p->esp_ts.crypto_alg = crypto_alg;
3905 p->esp_ts.integ_alg = integ_alg;
3906 p->esp_ts.crypto_key_size = crypto_key_size;
3911 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3912 u8 * name, u32 sw_if_index)
3917 p = ikev2_profile_index_by_name (name);
3921 r = clib_error_return (0, "unknown profile %v", name);
3925 p->tun_itf = sw_if_index;
3931 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3934 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3935 ikev2_main_t *km = &ikev2_main;
3936 vnet_api_error_t rv = 0;
3940 return VNET_API_ERROR_INVALID_VALUE;
3944 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3945 return VNET_API_ERROR_VALUE_EXIST;
3947 rv = ikev2_register_udp_port (p, port);
3951 v = hash_get (km->udp_ports, port);
3953 return VNET_API_ERROR_IKE_NO_PORT;
3955 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3956 return VNET_API_ERROR_INVALID_VALUE;
3958 ikev2_unregister_udp_port (p);
3964 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3966 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3971 r = clib_error_return (0, "unknown profile %v", name);
3980 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3981 u64 lifetime, u32 jitter, u32 handover,
3987 p = ikev2_profile_index_by_name (name);
3991 r = clib_error_return (0, "unknown profile %v", name);
3995 p->lifetime = lifetime;
3996 p->lifetime_jitter = jitter;
3997 p->handover = handover;
3998 p->lifetime_maxdata = maxdata;
4003 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4007 ikev2_main_t *km = &ikev2_main;
4009 p = ikev2_profile_index_by_name (name);
4013 r = clib_error_return (0, "unknown profile %v", name);
4017 if (p->responder.sw_if_index == ~0
4018 || ip_address_is_zero (&p->responder.addr))
4020 r = clib_error_return (0, "responder not set for profile %v", name);
4025 /* Create the Initiator Request */
4030 int len = sizeof (ike_header_t);
4031 ip4_address_t *if_ip4;
4032 ip6_address_t *if_ip6;
4033 ip_address_t if_ip = IP_ADDRESS_V4_ALL_0S;
4035 if (ip_addr_version (&p->responder.addr) == AF_IP4)
4037 if_ip4 = ip4_interface_first_address (&ip4_main,
4038 p->responder.sw_if_index, 0);
4041 ip_address_set (&if_ip, if_ip4, AF_IP4);
4046 if_ip6 = ip6_interface_first_address (&ip6_main,
4047 p->responder.sw_if_index);
4050 ip_address_set (&if_ip, if_ip6, AF_IP6);
4054 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4057 char *errmsg = "buffer alloc failure";
4058 ikev2_log_error (errmsg);
4059 return clib_error_return (0, errmsg);
4061 ike0 = vlib_buffer_get_current (b0);
4063 /* Prepare the SA and the IKE payload */
4065 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4066 ikev2_payload_chain_t *chain = 0;
4067 ikev2_payload_new_chain (chain);
4069 /* Build the IKE proposal payload */
4070 ikev2_sa_proposal_t *proposals = 0;
4071 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4072 proposals[0].proposal_num = 1;
4073 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4075 /* Add and then cleanup proposal data */
4076 ikev2_payload_add_sa (chain, proposals);
4077 ikev2_sa_free_proposal_vector (&proposals);
4079 sa.is_initiator = 1;
4080 sa.profile_index = p - km->profiles;
4081 sa.state = IKEV2_STATE_SA_INIT;
4082 sa.tun_itf = p->tun_itf;
4083 sa.udp_encap = p->udp_encap;
4084 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4085 sa.is_tun_itf_set = 1;
4086 sa.initial_contact = 1;
4087 sa.dst_port = IKEV2_PORT;
4088 ikev2_generate_sa_init_data (&sa);
4089 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4090 ikev2_payload_add_nonce (chain, sa.i_nonce);
4092 /* Build the child SA proposal */
4093 vec_resize (sa.childs, 1);
4094 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4095 &sa.childs[0].i_proposals, 0);
4096 sa.childs[0].i_proposals[0].proposal_num = 1;
4097 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4098 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4099 sizeof (sa.childs[0].i_proposals[0].spi));
4101 /* Add NAT detection notification messages (mandatory) */
4102 u8 *nat_detection_sha1 =
4103 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4104 clib_host_to_net_u64 (sa.rspi),
4105 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4107 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4108 nat_detection_sha1);
4109 vec_free (nat_detection_sha1);
4110 nat_detection_sha1 =
4111 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4112 clib_host_to_net_u64 (sa.rspi),
4114 clib_host_to_net_u16 (sa.dst_port));
4115 ikev2_payload_add_notify (chain,
4116 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4117 nat_detection_sha1);
4118 vec_free (nat_detection_sha1);
4120 u8 *sig_hash_algo = vec_new (u8, 8);
4121 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4122 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4123 ikev2_payload_add_notify (chain,
4124 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4126 vec_free (sig_hash_algo);
4129 /* Buffer update and boilerplate */
4130 len += vec_len (chain->data);
4131 ike0->nextpayload = chain->first_payload_type;
4132 ike0->length = clib_host_to_net_u32 (len);
4133 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4134 ikev2_payload_destroy_chain (chain);
4136 ike0->version = IKE_VERSION_2;
4137 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4138 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4139 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4143 /* store whole IKE payload - needed for PSK auth */
4144 vec_reset_length (sa.last_sa_init_req_packet_data);
4145 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4147 /* add data to the SA then add it to the pool */
4148 ip_address_copy (&sa.iaddr, &if_ip);
4149 ip_address_copy (&sa.raddr, &p->responder.addr);
4150 sa.i_id.type = p->loc_id.type;
4151 sa.i_id.data = vec_dup (p->loc_id.data);
4152 sa.r_id.type = p->rem_id.type;
4153 sa.r_id.data = vec_dup (p->rem_id.data);
4154 sa.i_auth.method = p->auth.method;
4155 sa.i_auth.hex = p->auth.hex;
4156 sa.i_auth.data = vec_dup (p->auth.data);
4157 sa.sw_if_index = p->responder.sw_if_index;
4158 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4159 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4161 ikev2_initial_contact_cleanup (&sa);
4163 /* add SA to the pool */
4164 ikev2_sa_t *sa0 = 0;
4165 pool_get (km->sais, sa0);
4166 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4167 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4169 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4170 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4172 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4173 clib_host_to_net_u64 (sa0->ispi), 0,
4174 ip_addr_v4 (&p->responder.addr).as_u32,
4175 ip_addr_version (&p->responder.addr) == AF_IP4);
4182 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4183 ikev2_child_sa_t * csa)
4185 /* Create the Initiator notification for child SA removal */
4186 ikev2_main_t *km = &ikev2_main;
4192 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4195 ikev2_log_error ("buffer alloc failure");
4199 ike0 = vlib_buffer_get_current (b0);
4200 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4201 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4202 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4203 vec_resize (sa->del, 1);
4204 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4205 sa->del->spi = csa->i_proposals->spi;
4206 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4207 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4208 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4213 len = ikev2_insert_non_esp_marker (ike0, len);
4214 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4215 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4217 /* delete local child SA */
4218 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4219 ikev2_sa_del_child_sa (sa, csa);
4223 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4226 ikev2_main_t *km = &ikev2_main;
4227 ikev2_main_per_thread_data_t *tkm;
4228 ikev2_sa_t *fsa = 0;
4229 ikev2_child_sa_t *fchild = 0;
4231 /* Search for the child SA */
4232 vec_foreach (tkm, km->per_thread_data)
4238 pool_foreach (sa, tkm->sas, ({
4239 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4249 if (!fchild || !fsa)
4251 r = clib_error_return (0, "Child SA not found");
4256 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4263 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4266 ikev2_main_t *km = &ikev2_main;
4267 ikev2_main_per_thread_data_t *tkm;
4268 ikev2_sa_t *fsa = 0;
4269 ikev2_main_per_thread_data_t *ftkm = 0;
4271 /* Search for the IKE SA */
4272 vec_foreach (tkm, km->per_thread_data)
4278 pool_foreach (sa, tkm->sas, ({
4279 if (sa->ispi == ispi)
4291 r = clib_error_return (0, "IKE SA not found");
4295 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
4300 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4301 ikev2_child_sa_t * csa)
4303 /* Create the Initiator request for create child SA */
4309 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4312 ikev2_log_error ("buffer alloc failure");
4316 ike0 = vlib_buffer_get_current (b0);
4317 ike0->version = IKE_VERSION_2;
4318 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4319 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4320 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4321 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4322 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4323 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4325 ikev2_rekey_t *rekey;
4326 vec_add2 (sa->rekey, rekey, 1);
4327 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4330 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4331 rekey->spi = proposals[0].spi;
4332 rekey->ispi = csa->i_proposals->spi;
4333 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4338 len = ikev2_insert_non_esp_marker (ike0, len);
4339 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4340 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4341 vec_free (proposals);
4345 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4348 ikev2_main_t *km = &ikev2_main;
4349 ikev2_main_per_thread_data_t *tkm;
4350 ikev2_sa_t *fsa = 0;
4351 ikev2_child_sa_t *fchild = 0;
4353 /* Search for the child SA */
4354 vec_foreach (tkm, km->per_thread_data)
4360 pool_foreach (sa, tkm->sas, ({
4361 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4371 if (!fchild || !fsa)
4373 r = clib_error_return (0, "Child SA not found");
4378 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4385 ikev2_init (vlib_main_t * vm)
4387 ikev2_main_t *km = &ikev2_main;
4388 vlib_thread_main_t *tm = vlib_get_thread_main ();
4391 clib_memset (km, 0, sizeof (ikev2_main_t));
4392 km->vnet_main = vnet_get_main ();
4395 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4396 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4397 ikev2_crypto_init (km);
4399 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4401 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4402 CLIB_CACHE_LINE_BYTES);
4403 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4405 ikev2_main_per_thread_data_t *ptd =
4406 vec_elt_at_index (km->per_thread_data, thread_id);
4408 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4410 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4411 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4412 ptd->hmac_ctx = HMAC_CTX_new ();
4414 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4415 ptd->evp_ctx = &ptd->_evp_ctx;
4416 HMAC_CTX_init (&(ptd->_hmac_ctx));
4417 ptd->hmac_ctx = &ptd->_hmac_ctx;
4421 km->sa_by_ispi = hash_create (0, sizeof (uword));
4422 km->sw_if_indices = hash_create (0, 0);
4423 km->udp_ports = hash_create (0, sizeof (uword));
4425 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4426 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4427 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4428 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4430 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4431 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4433 ikev2_cli_reference ();
4435 km->log_level = IKEV2_LOG_ERROR;
4436 km->log_class = vlib_log_register_class ("ikev2", 0);
4441 VLIB_INIT_FUNCTION (ikev2_init) =
4443 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4448 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4451 ikev2_main_t *km = &ikev2_main;
4452 ikev2_profile_t *p = 0;
4453 vlib_main_t *vm = km->vlib_main;
4454 f64 now = vlib_time_now (vm);
4457 if (sa->profile_index != ~0)
4458 p = pool_elt_at_index (km->profiles, sa->profile_index);
4460 if (sa->is_initiator && p && csa->time_to_expiration
4461 && now > csa->time_to_expiration)
4463 if (!csa->is_expired || csa->rekey_retries > 0)
4465 ikev2_rekey_child_sa_internal (vm, sa, csa);
4466 csa->time_to_expiration = now + p->handover;
4467 csa->is_expired = 1;
4468 if (csa->rekey_retries == 0)
4470 csa->rekey_retries = 5;
4472 else if (csa->rekey_retries > 0)
4474 csa->rekey_retries--;
4475 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4476 csa->i_proposals->spi, csa->rekey_retries);
4477 if (csa->rekey_retries == 0)
4479 csa->rekey_retries = -1;
4486 csa->time_to_expiration = 0;
4487 ikev2_delete_child_sa_internal (vm, sa, csa);
4495 ipip_tunnel_t *ipip = NULL;
4496 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4497 if (~0 == sw_if_index)
4499 ip46_address_t local_ip;
4500 ip46_address_t remote_ip;
4501 if (sa->is_initiator)
4503 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4504 ip_addr_bytes (&sa->iaddr));
4505 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4506 ip_addr_bytes (&sa->raddr));
4510 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4511 ip_addr_bytes (&sa->raddr));
4512 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4513 ip_addr_bytes (&sa->iaddr));
4517 ipip_tunnel_key_t key = {
4520 .transport = IPIP_TRANSPORT_IP4,
4525 ipip = ipip_tunnel_db_find (&key);
4528 sw_if_index = ipip->sw_if_index;
4534 vec_add1 (sas_in, csa->remote_sa_id);
4535 vlib_worker_thread_barrier_sync (vm);
4536 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4537 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4538 vlib_worker_thread_barrier_release (vm);
4545 ikev2_set_log_level (ikev2_log_level_t log_level)
4547 ikev2_main_t *km = &ikev2_main;
4549 if (log_level >= IKEV2_LOG_MAX)
4551 ikev2_log_error ("unknown logging level %d", log_level);
4555 km->log_level = log_level;
4560 ikev2_set_liveness_params (u32 period, u32 max_retries)
4562 ikev2_main_t *km = &ikev2_main;
4564 if (period == 0 || max_retries == 0)
4565 return clib_error_return (0, "invalid args");
4567 km->liveness_period = period;
4568 km->liveness_max_retries = max_retries;
4573 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4575 ikev2_main_t *km = &ikev2_main;
4576 vlib_main_t *vm = km->vlib_main;
4577 ikev2_main_per_thread_data_t *tkm;
4578 ikev2_sa_t *fsa = 0;
4579 ikev2_profile_t *p = 0;
4580 ikev2_child_sa_t *fchild = 0;
4581 f64 now = vlib_time_now (vm);
4582 vlib_counter_t counts;
4584 /* Search for the SA and child SA */
4585 vec_foreach (tkm, km->per_thread_data)
4591 pool_foreach (sa, tkm->sas, ({
4592 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4601 vlib_get_combined_counter (&ipsec_sa_counters,
4602 ipsec_sa->stat_index, &counts);
4604 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4605 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4607 if (fchild && p && p->lifetime_maxdata)
4609 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4611 fchild->time_to_expiration = now;
4617 ikev2_process_pending_sa_init (ikev2_main_t * km)
4624 hash_foreach (ispi, sai, km->sa_by_ispi,
4626 sa = pool_elt_at_index (km->sais, sai);
4627 if (sa->init_response_received)
4631 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4634 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4635 clib_memcpy_fast (vlib_buffer_get_current (b),
4636 sa->last_sa_init_req_packet_data,
4637 vec_len (sa->last_sa_init_req_packet_data));
4638 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4639 vec_len (sa->last_sa_init_req_packet_data),
4640 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4645 static vlib_node_registration_t ikev2_mngr_process_node;
4648 ikev2_send_informational_request (ikev2_sa_t * sa)
4650 ikev2_main_t *km = &ikev2_main;
4651 ip_address_t *src, *dst;
4658 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4661 ikev2_log_error ("buffer alloc failure");
4665 ike0 = vlib_buffer_get_current (b0);
4666 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4667 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4668 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4669 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4670 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4671 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4676 len = ikev2_insert_non_esp_marker (ike0, len);
4678 if (sa->is_initiator)
4689 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4690 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4694 static_always_inline int
4695 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4697 ikev2_main_t *km = &ikev2_main;
4698 vlib_main_t *vm = km->vlib_main;
4700 if (!sa->keys_generated)
4703 if (sa->liveness_retries >= km->liveness_max_retries)
4706 f64 now = vlib_time_now (vm);
4708 if (sa->liveness_period_check < now)
4710 sa->liveness_retries++;
4711 sa->liveness_period_check = now + km->liveness_period;
4712 ikev2_send_informational_request (sa);
4718 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4721 ikev2_main_t *km = &ikev2_main;
4722 ipsec_main_t *im = &ipsec_main;
4724 ikev2_child_sa_t *c;
4730 vlib_process_wait_for_event_or_clock (vm, 1);
4731 vlib_process_get_events (vm, NULL);
4733 /* process ike child sas */
4734 ikev2_main_per_thread_data_t *tkm;
4735 vec_foreach (tkm, km->per_thread_data)
4738 u32 *to_be_deleted = 0;
4741 pool_foreach (sa, tkm->sas, ({
4742 ikev2_child_sa_t *c;
4744 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4746 sa->old_remote_id_present = 0;
4750 sa->old_id_expiration -= 1;
4752 vec_foreach (c, sa->childs)
4754 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4757 if (ikev2_mngr_process_responder_sas (sa))
4758 vec_add1 (to_be_deleted, sa - tkm->sas);
4762 vec_foreach (sai, to_be_deleted)
4764 sa = pool_elt_at_index (tkm->sas, sai[0]);
4765 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4766 vec_foreach (c, sa->childs)
4768 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4769 ikev2_sa_del_child_sa (sa, c);
4771 ikev2_sa_free_all_vec (sa);
4772 hash_unset (tkm->sa_by_rspi, sa->rspi);
4773 pool_put (tkm->sas, sa);
4777 p = pool_elt_at_index (km->profiles, sa->profile_index);
4780 ikev2_initiate_sa_init (vm, p->name);
4784 vec_free (to_be_deleted);
4787 /* process ipsec sas */
4790 pool_foreach (sa, im->sad, ({
4791 ikev2_mngr_process_ipsec_sa(sa);
4795 ikev2_process_pending_sa_init (km);
4799 vlib_process_wait_for_event_or_clock (vm, 5);
4800 vlib_process_get_events (vm, NULL);
4809 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4810 .function = ikev2_mngr_process_fn,
4811 .type = VLIB_NODE_TYPE_PROCESS,
4813 "ikev2-manager-process",
4816 VLIB_PLUGIN_REGISTER () = {
4817 .version = VPP_BUILD_VER,
4818 .description = "Internet Key Exchange (IKEv2) Protocol",
4823 * fd.io coding-style-patch-verification: ON
4826 * eval: (c-set-style "gnu")