2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vnet/pg/pg.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/random.h>
24 #include <vnet/udp/udp.h>
25 #include <vnet/ipsec/ipsec.h>
26 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/ipip/ipip.h>
28 #include <plugins/ikev2/ikev2.h>
29 #include <plugins/ikev2/ikev2_priv.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 static vlib_node_registration_t ikev2_node;
67 #define foreach_ikev2_error \
68 _(PROCESSED, "IKEv2 packets processed") \
69 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
70 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
71 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
72 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
73 _(NOT_IKEV2, "Non IKEv2 packets received") \
74 _(BAD_LENGTH, "Bad packet length") \
75 _(MALFORMED_PACKET, "Malformed packet") \
76 _(NO_BUFF_SPACE, "No buffer space")
80 #define _(sym,str) IKEV2_ERROR_##sym,
86 static char *ikev2_error_strings[] = {
87 #define _(sym,string) string,
94 IKEV2_NEXT_IP4_LOOKUP,
95 IKEV2_NEXT_ERROR_DROP,
99 typedef u32 ikev2_non_esp_marker;
101 static_always_inline u16
102 ikev2_get_port (ikev2_sa_t * sa)
104 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
107 static_always_inline int
108 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
110 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
111 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
112 return len + sizeof (ikev2_non_esp_marker);
115 static ikev2_sa_transform_t *
116 ikev2_find_transform_data (ikev2_sa_transform_t * t)
118 ikev2_main_t *km = &ikev2_main;
119 ikev2_sa_transform_t *td;
121 vec_foreach (td, km->supported_transforms)
123 if (td->type != t->type)
126 if (td->transform_id != t->transform_id)
129 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
131 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
132 || t->attrs[1] != 14)
135 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
143 static ikev2_sa_proposal_t *
144 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
145 ikev2_protocol_id_t prot_id)
147 ikev2_sa_proposal_t *rv = 0;
148 ikev2_sa_proposal_t *proposal;
149 ikev2_sa_transform_t *transform, *new_t;
150 u8 mandatory_bitmap, optional_bitmap;
152 if (prot_id == IKEV2_PROTOCOL_IKE)
154 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
155 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
156 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
158 else if (prot_id == IKEV2_PROTOCOL_ESP)
160 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
161 (1 << IKEV2_TRANSFORM_TYPE_ESN);
162 optional_bitmap = mandatory_bitmap |
163 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
165 else if (prot_id == IKEV2_PROTOCOL_AH)
167 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
168 (1 << IKEV2_TRANSFORM_TYPE_ESN);
169 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
174 vec_add2 (rv, proposal, 1);
176 vec_foreach (proposal, proposals)
179 if (proposal->protocol_id != prot_id)
182 vec_foreach (transform, proposal->transforms)
184 if ((1 << transform->type) & bitmap)
187 if (ikev2_find_transform_data (transform))
189 bitmap |= 1 << transform->type;
190 vec_add2 (rv->transforms, new_t, 1);
191 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
192 new_t->attrs = vec_dup (transform->attrs);
196 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
197 (bitmap & ~optional_bitmap) == 0)
199 rv->proposal_num = proposal->proposal_num;
200 rv->protocol_id = proposal->protocol_id;
201 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
206 vec_free (rv->transforms);
215 ikev2_sa_transform_t *
216 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
217 ikev2_transform_type_t type)
219 ikev2_sa_transform_t *t;
224 vec_foreach (t, p->transforms)
227 return ikev2_find_transform_data (t);
233 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
237 vec_foreach (c, sa->childs)
239 ikev2_sa_proposal_t *proposal =
240 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
241 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
249 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
251 ikev2_sa_proposal_t *p;
252 ikev2_sa_transform_t *t;
259 vec_foreach (t, p->transforms)
263 vec_free (p->transforms);
269 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
271 ikev2_sa_free_proposal_vector (&c->r_proposals);
272 ikev2_sa_free_proposal_vector (&c->i_proposals);
282 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
285 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
291 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
293 ikev2_sa_free_child_sa (child);
294 vec_del1 (sa->childs, child - sa->childs);
298 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
300 vec_free (sa->i_nonce);
301 vec_free (sa->r_nonce);
303 vec_free (sa->dh_shared_key);
304 vec_free (sa->dh_private_key);
305 vec_free (sa->i_dh_data);
306 vec_free (sa->r_dh_data);
308 ikev2_sa_free_proposal_vector (&sa->r_proposals);
309 ikev2_sa_free_proposal_vector (&sa->i_proposals);
312 vec_free (sa->sk_ai);
313 vec_free (sa->sk_ar);
314 vec_free (sa->sk_ei);
315 vec_free (sa->sk_er);
316 vec_free (sa->sk_pi);
317 vec_free (sa->sk_pr);
319 vec_free (sa->i_id.data);
320 vec_free (sa->r_id.data);
322 vec_free (sa->i_auth.data);
324 EVP_PKEY_free (sa->i_auth.key);
325 vec_free (sa->r_auth.data);
327 EVP_PKEY_free (sa->r_auth.key);
331 vec_free (sa->rekey);
333 vec_free (sa->last_sa_init_req_packet_data);
334 vec_free (sa->last_sa_init_res_packet_data);
336 vec_free (sa->last_res_packet_data);
338 ikev2_sa_free_all_child_sa (&sa->childs);
342 ikev2_delete_sa (ikev2_sa_t * sa)
344 ikev2_main_t *km = &ikev2_main;
345 u32 thread_index = vlib_get_thread_index ();
348 ikev2_sa_free_all_vec (sa);
350 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
353 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
354 pool_put (km->per_thread_data[thread_index].sas, sa);
359 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
361 ikev2_sa_transform_t *t = 0, *t2;
362 ikev2_main_t *km = &ikev2_main;
364 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
369 /* check if received DH group is on our list of supported groups */
370 vec_foreach (t2, km->supported_transforms)
372 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
381 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
385 if (sa->is_initiator)
388 RAND_bytes ((u8 *) & sa->ispi, 8);
391 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
392 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
397 RAND_bytes ((u8 *) & sa->rspi, 8);
400 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
401 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
404 /* generate dh keys */
405 ikev2_generate_dh (sa, t);
410 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
412 ikev2_sa_transform_t *t = 0, *t2;
413 ikev2_main_t *km = &ikev2_main;
415 /*move some data to the new SA */
416 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
417 sa->i_nonce = _(sai->i_nonce);
418 sa->i_dh_data = _(sai->i_dh_data);
419 sa->dh_private_key = _(sai->dh_private_key);
420 sa->iaddr.as_u32 = sai->iaddr.as_u32;
421 sa->raddr.as_u32 = sai->raddr.as_u32;
422 sa->is_initiator = sai->is_initiator;
423 sa->i_id.type = sai->i_id.type;
424 sa->r_id.type = sai->r_id.type;
425 sa->profile_index = sai->profile_index;
426 sa->tun_itf = sai->tun_itf;
427 sa->is_tun_itf_set = sai->is_tun_itf_set;
428 sa->i_id.data = _(sai->i_id.data);
429 sa->r_id.data = _(sai->r_id.data);
430 sa->i_auth.method = sai->i_auth.method;
431 sa->i_auth.hex = sai->i_auth.hex;
432 sa->i_auth.data = _(sai->i_auth.data);
433 sa->i_auth.key = _(sai->i_auth.key);
434 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
435 sa->childs = _(sai->childs);
436 sa->udp_encap = sai->udp_encap;
437 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
438 sa->dst_port = sai->dst_port;
439 sa->sw_if_index = sai->sw_if_index;
443 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
448 /* check if received DH group is on our list of supported groups */
449 vec_foreach (t2, km->supported_transforms)
451 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
460 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
465 /* generate dh keys */
466 ikev2_complete_dh (sa, t);
471 ikev2_calc_keys (ikev2_sa_t * sa)
474 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
477 u16 integ_key_len = 0, salt_len = 0;
478 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
480 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
482 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
484 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
487 integ_key_len = tr_integ->key_len;
489 salt_len = sizeof (u32);
491 vec_append (s, sa->i_nonce);
492 vec_append (s, sa->r_nonce);
493 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
495 /* Calculate S = Ni | Nr | SPIi | SPIr */
497 vec_add2 (s, tmp, 2 * sizeof (*spi));
499 spi[0] = clib_host_to_net_u64 (sa->ispi);
500 spi[1] = clib_host_to_net_u64 (sa->rspi);
502 /* calculate PRFplus */
504 int len = tr_prf->key_trunc + /* SK_d */
505 integ_key_len * 2 + /* SK_ai, SK_ar */
506 tr_encr->key_len * 2 + /* SK_ei, SK_er */
507 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
510 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
517 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
518 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
519 pos += tr_prf->key_trunc;
524 sa->sk_ai = vec_new (u8, integ_key_len);
525 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
526 pos += integ_key_len;
529 sa->sk_ar = vec_new (u8, integ_key_len);
530 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
531 pos += integ_key_len;
535 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
536 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
537 pos += tr_encr->key_len + salt_len;
540 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
541 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
542 pos += tr_encr->key_len + salt_len;
545 sa->sk_pi = vec_new (u8, tr_prf->key_len);
546 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
547 pos += tr_prf->key_len;
550 sa->sk_pr = vec_new (u8, tr_prf->key_len);
551 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
552 pos += tr_prf->key_len;
555 sa->keys_generated = 1;
559 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
562 u16 integ_key_len = 0;
565 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
567 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
569 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
571 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
574 integ_key_len = ctr_integ->key_len;
576 salt_len = sizeof (u32);
578 vec_append (s, sa->i_nonce);
579 vec_append (s, sa->r_nonce);
580 /* calculate PRFplus */
582 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
584 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
589 child->sk_ei = vec_new (u8, ctr_encr->key_len);
590 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
591 pos += ctr_encr->key_len;
596 child->sk_ai = vec_new (u8, ctr_integ->key_len);
597 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
598 pos += ctr_integ->key_len;
602 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
607 child->sk_er = vec_new (u8, ctr_encr->key_len);
608 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
609 pos += ctr_encr->key_len;
614 child->sk_ar = vec_new (u8, integ_key_len);
615 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
616 pos += integ_key_len;
620 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
629 static_always_inline u8 *
630 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port)
632 /* ispi, rspi, ip, port */
633 u8 buf[8 + 8 + 4 + 2];
634 u8 *res = vec_new (u8, 20);
636 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
637 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
638 clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip));
639 clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port));
640 SHA1 (buf, sizeof (buf), res);
645 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
648 const ike_ke_payload_header_t *ke = p;
649 u16 plen = clib_net_to_host_u16 (ke->length);
650 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
651 if (sizeof (*ke) > rlen)
654 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
655 vec_reset_length (ke_data[0]);
656 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
661 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
663 const ike_payload_header_t *ikep = p;
664 u16 plen = clib_net_to_host_u16 (ikep->length);
665 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
666 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
671 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
674 if (sizeof (*ikep) > rlen)
676 *plen = clib_net_to_host_u16 (ikep->length);
677 if (*plen < sizeof (*ikep) || *plen > rlen)
683 ikev2_process_sa_init_req (vlib_main_t * vm,
684 ikev2_sa_t * sa, ike_header_t * ike,
685 udp_header_t * udp, u32 len)
687 u8 nonce[IKEV2_NONCE_SIZE];
689 u8 payload = ike->nextpayload;
690 ike_payload_header_t *ikep;
693 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
695 clib_net_to_host_u64 (ike->ispi),
696 clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32);
698 sa->ispi = clib_net_to_host_u64 (ike->ispi);
700 /* store whole IKE payload - needed for PSK auth */
701 vec_reset_length (sa->last_sa_init_req_packet_data);
702 vec_add (sa->last_sa_init_req_packet_data, ike, len);
704 if (len < sizeof (*ike))
707 len -= sizeof (*ike);
708 while (p < len && payload != IKEV2_PAYLOAD_NONE)
710 ikep = (ike_payload_header_t *) & ike->payload[p];
711 int current_length = len - p;
712 if (!ikev2_check_payload_length (ikep, current_length, &plen))
715 if (payload == IKEV2_PAYLOAD_SA)
717 ikev2_sa_free_proposal_vector (&sa->i_proposals);
718 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
720 else if (payload == IKEV2_PAYLOAD_KE)
722 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
726 else if (payload == IKEV2_PAYLOAD_NONCE)
728 vec_reset_length (sa->i_nonce);
729 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
730 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
732 else if (payload == IKEV2_PAYLOAD_NOTIFY)
735 ikev2_parse_notify_payload (ikep, current_length);
736 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
738 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0,
741 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
744 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
745 " behind NAT", sa->ispi);
749 else if (n->msg_type ==
750 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
752 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0,
755 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
758 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
759 " (self) behind NAT", sa->ispi);
765 else if (payload == IKEV2_PAYLOAD_VENDOR)
767 ikev2_parse_vendor_payload (ikep);
771 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
773 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
775 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
776 sa->unsupported_cp = payload;
781 payload = ikep->nextpayload;
785 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
790 ikev2_process_sa_init_resp (vlib_main_t * vm,
791 ikev2_sa_t * sa, ike_header_t * ike,
792 udp_header_t * udp, u32 len)
794 u8 nonce[IKEV2_NONCE_SIZE];
796 u8 payload = ike->nextpayload;
797 ike_payload_header_t *ikep;
800 sa->ispi = clib_net_to_host_u64 (ike->ispi);
801 sa->rspi = clib_net_to_host_u64 (ike->rspi);
803 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
804 "from %d.%d.%d.%d", sa->ispi, sa->rspi,
807 /* store whole IKE payload - needed for PSK auth */
808 vec_reset_length (sa->last_sa_init_res_packet_data);
809 vec_add (sa->last_sa_init_res_packet_data, ike, len);
811 if (sizeof (*ike) > len)
814 len -= sizeof (*ike);
815 while (p < len && payload != IKEV2_PAYLOAD_NONE)
817 int current_length = len - p;
818 ikep = (ike_payload_header_t *) & ike->payload[p];
819 if (!ikev2_check_payload_length (ikep, current_length, &plen))
822 if (payload == IKEV2_PAYLOAD_SA)
824 ikev2_sa_free_proposal_vector (&sa->r_proposals);
825 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
828 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
830 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
833 else if (payload == IKEV2_PAYLOAD_KE)
835 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
839 else if (payload == IKEV2_PAYLOAD_NONCE)
841 vec_reset_length (sa->r_nonce);
842 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
843 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
845 else if (payload == IKEV2_PAYLOAD_NOTIFY)
848 ikev2_parse_notify_payload (ikep, current_length);
849 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
851 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi,
855 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
857 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
858 " behind NAT, unsupported", sa->ispi);
862 else if (n->msg_type ==
863 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
865 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi,
869 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
872 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
873 " (self) behind NAT", sa->ispi);
879 else if (payload == IKEV2_PAYLOAD_VENDOR)
881 ikev2_parse_vendor_payload (ikep);
885 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
887 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
889 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
890 sa->unsupported_cp = payload;
895 payload = ikep->nextpayload;
901 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
902 u8 * payload, u32 rlen, u32 * out_len)
904 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
906 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
907 ike_payload_header_t *ikep = 0;
910 ikev2_sa_transform_t *tr_integ;
911 ikev2_sa_transform_t *tr_encr;
913 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
915 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
916 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
918 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
921 if (rlen <= sizeof (*ike))
924 int len = rlen - sizeof (*ike);
926 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
928 ikep = (ike_payload_header_t *) & ike->payload[p];
929 int current_length = len - p;
930 if (!ikev2_check_payload_length (ikep, current_length, &plen))
933 if (*payload == IKEV2_PAYLOAD_SK)
935 last_payload = *payload;
939 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
941 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
943 sa->unsupported_cp = *payload;
948 *payload = ikep->nextpayload;
952 if (last_payload != IKEV2_PAYLOAD_SK)
954 ikev2_elog_error ("Last payload must be SK");
960 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
963 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
964 u8 *aad = (u8 *) ike;
965 u32 aad_len = ikep->payload - aad;
966 u8 *tag = ikep->payload + plen;
968 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
969 plen, aad, aad_len, tag, &dlen);
973 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
978 if (rlen < tr_integ->key_trunc)
982 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
983 (u8 *) ike, rlen - tr_integ->key_trunc);
985 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
988 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
990 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
992 ikev2_elog_error ("message integrity check failed");
998 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1003 plaintext = ikep->payload + tr_encr->block_size;
1010 static_always_inline int
1011 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1013 if (i1->type != i2->type)
1016 if (vec_len (i1->data) != vec_len (i2->data))
1019 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1026 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
1028 ikev2_main_t *km = &ikev2_main;
1031 ikev2_child_sa_t *c;
1032 u32 thread_index = vlib_get_thread_index ();
1034 if (!sa->initial_contact)
1037 /* find old IKE SAs with the same authenticated identity */
1039 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
1040 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1041 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1044 if (sa->rspi != tmp->rspi)
1045 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
1049 for (i = 0; i < vec_len (delete); i++)
1052 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
1054 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
1056 ikev2_delete_sa (tmp);
1060 sa->initial_contact = 0;
1064 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1066 const ike_id_payload_header_t *id = p;
1067 u16 plen = clib_net_to_host_u16 (id->length);
1068 if (plen < sizeof (*id) || plen > rlen)
1071 sa_id->type = id->id_type;
1072 vec_reset_length (sa_id->data);
1073 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1079 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1081 const ike_auth_payload_header_t *ah = p;
1082 u16 plen = clib_net_to_host_u16 (ah->length);
1084 a->method = ah->auth_method;
1085 vec_reset_length (a->data);
1086 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1091 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1092 ike_header_t * ike, u32 len)
1095 ikev2_child_sa_t *first_child_sa;
1096 u8 payload = ike->nextpayload;
1098 ike_payload_header_t *ikep;
1102 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1103 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1104 clib_host_to_net_u64 (ike->rspi),
1105 sa->is_initiator ? sa->raddr.as_u32 : sa->
1108 ikev2_calc_keys (sa);
1110 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1114 if (sa->unsupported_cp)
1116 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1122 /* select or create 1st child SA */
1123 if (sa->is_initiator)
1125 first_child_sa = &sa->childs[0];
1129 ikev2_sa_free_all_child_sa (&sa->childs);
1130 vec_add2 (sa->childs, first_child_sa, 1);
1134 /* process encrypted payload */
1135 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1137 ikep = (ike_payload_header_t *) & plaintext[p];
1138 int current_length = dlen - p;
1139 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1142 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1144 if (sa->is_initiator)
1146 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1147 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1152 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1153 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1157 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1159 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1162 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1164 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1167 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1169 if (sa->is_initiator)
1171 if (!ikev2_parse_auth_payload (ikep, current_length,
1177 if (!ikev2_parse_auth_payload (ikep, current_length,
1182 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1185 ikev2_parse_notify_payload (ikep, current_length);
1186 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1188 sa->initial_contact = 1;
1192 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1194 ikev2_parse_vendor_payload (ikep);
1196 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1198 vec_free (first_child_sa->tsi);
1199 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1201 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1203 vec_free (first_child_sa->tsr);
1204 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1208 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1211 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1213 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1214 sa->unsupported_cp = payload;
1219 payload = ikep->nextpayload;
1226 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1231 ikev2_process_informational_req (vlib_main_t * vm,
1232 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1235 u8 payload = ike->nextpayload;
1237 ike_payload_header_t *ikep;
1239 ikev2_notify_t *n = 0;
1241 sa->liveness_retries = 0;
1242 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1243 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1244 clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32);
1246 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1251 /* process encrypted payload */
1253 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1255 u32 current_length = dlen - p;
1256 if (p + sizeof (*ikep) > dlen)
1259 ikep = (ike_payload_header_t *) & plaintext[p];
1260 u16 plen = clib_net_to_host_u16 (ikep->length);
1262 if (plen < sizeof (*ikep) || plen > current_length)
1265 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1267 n = ikev2_parse_notify_payload (ikep, current_length);
1270 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1271 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1274 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1276 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1278 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1280 ikev2_parse_vendor_payload (ikep);
1284 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1286 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1288 sa->unsupported_cp = payload;
1292 payload = ikep->nextpayload;
1299 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1300 ikev2_sa_t * sa, ike_header_t * ike,
1304 u8 payload = ike->nextpayload;
1307 u8 nonce[IKEV2_NONCE_SIZE];
1309 ike_payload_header_t *ikep;
1310 ikev2_notify_t *n = 0;
1311 ikev2_ts_t *tsi = 0;
1312 ikev2_ts_t *tsr = 0;
1313 ikev2_sa_proposal_t *proposal = 0;
1314 ikev2_child_sa_t *child_sa;
1318 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1319 "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi),
1320 clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32);
1322 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1325 goto cleanup_and_exit;
1327 /* process encrypted payload */
1329 while (payload != IKEV2_PAYLOAD_NONE)
1331 ikep = (ike_payload_header_t *) & plaintext[p];
1332 int current_length = dlen - p;
1333 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1334 goto cleanup_and_exit;
1336 if (payload == IKEV2_PAYLOAD_SA)
1338 proposal = ikev2_parse_sa_payload (ikep, current_length);
1340 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1342 n = ikev2_parse_notify_payload (ikep, current_length);
1343 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1348 else if (payload == IKEV2_PAYLOAD_DELETE)
1350 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1352 else if (payload == IKEV2_PAYLOAD_VENDOR)
1354 ikev2_parse_vendor_payload (ikep);
1356 else if (payload == IKEV2_PAYLOAD_NONCE)
1358 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1360 else if (payload == IKEV2_PAYLOAD_TSI)
1362 tsi = ikev2_parse_ts_payload (ikep, current_length);
1364 else if (payload == IKEV2_PAYLOAD_TSR)
1366 tsr = ikev2_parse_ts_payload (ikep, current_length);
1370 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1372 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1374 sa->unsupported_cp = payload;
1375 goto cleanup_and_exit;
1378 payload = ikep->nextpayload;
1382 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1384 ikev2_rekey_t *rekey = &sa->rekey[0];
1385 rekey->protocol_id = proposal->protocol_id;
1387 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1388 rekey->i_proposal->spi = rekey->spi;
1389 rekey->r_proposal = proposal;
1393 vec_reset_length (sa->r_nonce);
1394 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1395 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1398 child_sa->rekey_retries = 0;
1403 ikev2_rekey_t *rekey;
1404 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1407 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1409 goto cleanup_and_exit;
1411 vec_add2 (sa->rekey, rekey, 1);
1412 rekey->protocol_id = n->protocol_id;
1413 rekey->spi = n->spi;
1414 rekey->i_proposal = proposal;
1416 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1420 vec_free (sa->i_nonce);
1421 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1422 /* generate new Nr */
1423 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1424 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1435 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1443 ikev2_sa_transform_t *tr_prf;
1446 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1452 nonce = sa->i_nonce;
1453 packet_data = sa->last_sa_init_res_packet_data;
1459 nonce = sa->r_nonce;
1460 packet_data = sa->last_sa_init_req_packet_data;
1463 data = vec_new (u8, 4);
1465 vec_append (data, id->data);
1467 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1468 vec_append (authmsg, packet_data);
1469 vec_append (authmsg, nonce);
1470 vec_append (authmsg, id_hash);
1478 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1480 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1481 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1482 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1483 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1490 ikev2_sa_match_ts (ikev2_sa_t * sa)
1492 ikev2_main_t *km = &ikev2_main;
1494 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1495 ikev2_id_t *id_rem, *id_loc;
1498 pool_foreach (p, km->profiles, ({
1500 if (sa->is_initiator)
1516 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1517 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1520 sa->profile_index = p - km->profiles;
1522 vec_foreach(ts, sa->childs[0].tsi)
1524 if (ikev2_ts_cmp(p_tsi, ts))
1526 vec_add1 (tsi, ts[0]);
1531 vec_foreach(ts, sa->childs[0].tsr)
1533 if (ikev2_ts_cmp(p_tsr, ts))
1535 vec_add1 (tsr, ts[0]);
1546 vec_free (sa->childs[0].tsi);
1547 vec_free (sa->childs[0].tsr);
1548 sa->childs[0].tsi = tsi;
1549 sa->childs[0].tsr = tsr;
1555 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1560 ikev2_sa_auth (ikev2_sa_t * sa)
1562 ikev2_main_t *km = &ikev2_main;
1563 ikev2_profile_t *p, *sel_p = 0;
1564 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1565 ikev2_sa_transform_t *tr_prf;
1568 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1570 /* only shared key and rsa signature */
1571 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1572 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1574 ikev2_elog_uint (IKEV2_LOG_ERROR,
1575 "unsupported authentication method %u",
1577 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1581 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1582 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1584 ikev2_id_t *id_rem, *id_loc;
1585 ikev2_auth_t *sa_auth;
1587 if (sa->is_initiator)
1591 sa_auth = &sa->r_auth;
1597 sa_auth = &sa->i_auth;
1601 pool_foreach (p, km->profiles, ({
1604 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1605 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1608 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1610 if (!p->auth.data ||
1611 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1614 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1615 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1617 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1619 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1626 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1628 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1631 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1633 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1646 sa->udp_encap = sel_p->udp_encap;
1647 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1651 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1653 if (!sa->is_initiator)
1655 vec_free (sa->r_id.data);
1656 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1657 sa->r_id.type = sel_p->loc_id.type;
1658 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1659 sa->i_id.type = sel_p->rem_id.type;
1661 /* generate our auth data */
1662 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1663 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1665 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1666 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1668 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1670 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1671 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1675 /* select transforms for 1st child sa */
1676 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1677 sa->childs[0].r_proposals =
1678 ikev2_select_proposal (sa->childs[0].i_proposals,
1679 IKEV2_PROTOCOL_ESP);
1681 if (~0 != sel_p->tun_itf)
1683 sa->is_tun_itf_set = 1;
1684 sa->tun_itf = sel_p->tun_itf;
1690 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1691 "profile found! ispi %lx", sa->ispi);
1692 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1700 ikev2_sa_auth_init (ikev2_sa_t * sa)
1702 ikev2_main_t *km = &ikev2_main;
1703 u8 *authmsg, *key_pad, *psk = 0;
1704 ikev2_sa_transform_t *tr_prf;
1707 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1709 /* only shared key and rsa signature */
1710 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1711 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1713 ikev2_elog_uint (IKEV2_LOG_ERROR,
1714 "unsupported authentication method %u",
1716 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1720 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1721 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1722 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1724 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1726 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1727 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1729 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1731 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1732 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1741 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1743 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1747 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1749 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1759 ipsec_sa_flags_t flags;
1762 ipsec_crypto_alg_t encr_type;
1763 ipsec_integ_alg_t integ_type;
1764 ip46_address_t local_ip;
1765 ip46_address_t remote_ip;
1766 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1768 u32 old_remote_sa_id;
1769 u16 ipsec_over_udp_port;
1772 } ikev2_add_ipsec_tunnel_args_t;
1775 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1777 ikev2_main_t *km = &ikev2_main;
1781 if (~0 == a->sw_if_index)
1783 /* no tunnel associated with the SA/profile - create a new one */
1784 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1785 &a->local_ip, &a->remote_ip, 0,
1786 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1787 TUNNEL_MODE_P2P, &sw_if_index);
1789 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1791 if (hash_get (km->sw_if_indices, sw_if_index))
1792 /* interface is managed by IKE; proceed with updating SAs */
1795 hash_set1 (km->sw_if_indices, sw_if_index);
1799 sw_if_index = a->sw_if_index;
1800 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1805 ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! "
1806 "loc:%d.%d.%d.%d rem:%d.%d.%d.%d",
1807 a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32);
1812 vec_add1 (sas_in, a->remote_sa_id);
1815 ipsec_tun_protect_del (sw_if_index, NULL);
1817 /* replace local SA immediately */
1818 ipsec_sa_unlock_id (a->local_sa_id);
1820 /* keep the old sa */
1821 vec_add1 (sas_in, a->old_remote_sa_id);
1824 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1826 IPSEC_PROTOCOL_ESP, a->encr_type,
1827 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1828 a->flags, 0, a->salt_local, &a->local_ip,
1829 &a->remote_ip, NULL, a->src_port, a->dst_port);
1830 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1831 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1832 a->integ_type, &a->rem_ikey,
1833 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1834 a->salt_remote, &a->remote_ip,
1835 &a->local_ip, NULL, a->ipsec_over_udp_port,
1836 a->ipsec_over_udp_port);
1838 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1842 ikev2_create_tunnel_interface (vlib_main_t * vm,
1844 ikev2_child_sa_t * child, u32 sa_index,
1845 u32 child_index, u8 is_rekey)
1847 u32 thread_index = vlib_get_thread_index ();
1848 ikev2_main_t *km = &ikev2_main;
1849 ipsec_crypto_alg_t encr_type;
1850 ipsec_integ_alg_t integ_type;
1851 ikev2_profile_t *p = 0;
1852 ikev2_sa_transform_t *tr;
1853 ikev2_sa_proposal_t *proposals;
1855 ikev2_add_ipsec_tunnel_args_t a;
1857 clib_memset (&a, 0, sizeof (a));
1859 if (!child->r_proposals)
1861 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1865 if (sa->is_initiator)
1867 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
1868 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
1869 proposals = child->r_proposals;
1870 a.local_spi = child->r_proposals[0].spi;
1871 a.remote_spi = child->i_proposals[0].spi;
1875 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
1876 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
1877 proposals = child->i_proposals;
1878 a.local_spi = child->i_proposals[0].spi;
1879 a.remote_spi = child->r_proposals[0].spi;
1882 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1885 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1886 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1889 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1890 a.is_rekey = is_rekey;
1892 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1893 if (tr && tr->esn_type)
1894 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1896 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1899 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1901 switch (tr->key_len)
1904 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1907 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1910 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1913 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1918 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1921 switch (tr->key_len)
1924 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1927 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1930 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1933 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1941 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1947 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1950 a.encr_type = encr_type;
1954 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1957 switch (tr->integ_type)
1959 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1960 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1962 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1963 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1965 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1966 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1968 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1969 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1972 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1978 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1984 integ_type = IPSEC_INTEG_ALG_NONE;
1987 a.integ_type = integ_type;
1988 ikev2_calc_child_keys (sa, child);
1990 if (sa->is_initiator)
1992 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
1993 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
1994 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
1995 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
1998 a.salt_remote = child->salt_er;
1999 a.salt_local = child->salt_ei;
2001 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2005 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2006 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2007 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2008 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2011 a.salt_remote = child->salt_ei;
2012 a.salt_local = child->salt_er;
2014 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
2015 a.src_port = sa->ipsec_over_udp_port;
2018 if (sa->is_initiator && sa->profile_index != ~0)
2019 p = pool_elt_at_index (km->profiles, sa->profile_index);
2021 if (p && p->lifetime)
2023 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2024 if (p->lifetime_jitter)
2026 // This is not much better than rand(3), which Coverity warns
2027 // is unsuitable for security applications; random_u32 is
2028 // however fast. If this perturbance to the expiration time
2029 // needs to use a better RNG then we may need to use something
2030 // like /dev/urandom which has significant overhead.
2031 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2032 rnd = random_u32 (&rnd);
2034 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2038 if (thread_index & 0xffffffc0)
2039 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2041 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2042 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2044 child->local_sa_id =
2046 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2048 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2053 /* create a new remote SA ID to keep the old SA for a bit longer
2054 * so the peer has some time to swap their SAs */
2056 /* use most significat bit of child index part in id */
2058 if (sa->current_remote_id_mask)
2060 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2061 sa->current_remote_id_mask = 0;
2065 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2066 sa->current_remote_id_mask = mask;
2067 remote_sa_id |= mask;
2069 sa->old_id_expiration = 3.0;
2070 sa->old_remote_id_present = 1;
2073 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2075 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2076 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2078 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2079 (u8 *) & a, sizeof (a));
2085 ip46_address_t local_ip;
2086 ip46_address_t remote_ip;
2090 } ikev2_del_ipsec_tunnel_args_t;
2092 static_always_inline u32
2093 ikev2_flip_alternate_sa_bit (u32 id)
2102 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2104 ikev2_main_t *km = &ikev2_main;
2105 ipip_tunnel_t *ipip = NULL;
2108 if (~0 == a->sw_if_index)
2111 ipip_tunnel_key_t key = {
2113 .dst = a->remote_ip,
2114 .transport = IPIP_TRANSPORT_IP4,
2119 ipip = ipip_tunnel_db_find (&key);
2123 sw_if_index = ipip->sw_if_index;
2124 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2131 sw_if_index = a->sw_if_index;
2132 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2135 if (~0 != sw_if_index)
2136 ipsec_tun_protect_del (sw_if_index, NULL);
2138 ipsec_sa_unlock_id (a->remote_sa_id);
2139 ipsec_sa_unlock_id (a->local_sa_id);
2140 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2143 ipip_del_tunnel (ipip->sw_if_index);
2147 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2148 ikev2_child_sa_t * child)
2150 ikev2_del_ipsec_tunnel_args_t a;
2152 clib_memset (&a, 0, sizeof (a));
2154 if (sa->is_initiator)
2156 ip46_address_set_ip4 (&a.local_ip, &sa->iaddr);
2157 ip46_address_set_ip4 (&a.remote_ip, &sa->raddr);
2161 ip46_address_set_ip4 (&a.local_ip, &sa->raddr);
2162 ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr);
2165 a.remote_sa_id = child->remote_sa_id;
2166 a.local_sa_id = child->local_sa_id;
2167 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2169 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2175 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2176 ike_header_t * ike, void *user, udp_header_t * udp)
2178 ikev2_main_t *km = &ikev2_main;
2179 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2181 ike_payload_header_t *ph;
2185 ikev2_sa_transform_t *tr_encr, *tr_integ;
2187 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2189 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2191 ikev2_payload_chain_t *chain = 0;
2192 ikev2_payload_new_chain (chain);
2194 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2196 if (sa->r_proposals == 0)
2198 ikev2_payload_add_notify (chain,
2199 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2200 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2202 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2204 u8 *data = vec_new (u8, 2);
2205 ikev2_sa_transform_t *tr_dh;
2207 ikev2_sa_get_td_for_type (sa->r_proposals,
2208 IKEV2_TRANSFORM_TYPE_DH);
2209 ASSERT (tr_dh && tr_dh->dh_type);
2211 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2212 data[1] = (tr_dh->dh_type) & 0xff;
2214 ikev2_payload_add_notify (chain,
2215 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2218 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2220 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2222 u8 *data = vec_new (u8, 1);
2224 data[0] = sa->unsupported_cp;
2225 ikev2_payload_add_notify (chain,
2226 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2234 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2235 ikev2_payload_add_sa (chain, sa->r_proposals);
2236 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2237 ikev2_payload_add_nonce (chain, sa->r_nonce);
2239 u8 *nat_detection_sha1 =
2240 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2241 clib_host_to_net_u64 (sa->rspi),
2244 ikev2_payload_add_notify (chain,
2245 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2246 nat_detection_sha1);
2247 vec_free (nat_detection_sha1);
2248 nat_detection_sha1 =
2249 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2250 clib_host_to_net_u64 (sa->rspi),
2251 sa->iaddr.as_u32, udp->src_port);
2252 ikev2_payload_add_notify (chain,
2253 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2254 nat_detection_sha1);
2255 vec_free (nat_detection_sha1);
2258 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2260 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2262 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2263 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2264 ikev2_payload_add_auth (chain, &sa->r_auth);
2265 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2266 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2267 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2269 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2271 ikev2_payload_add_notify (chain,
2272 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2274 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2276 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2278 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2280 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2281 ikev2_payload_add_auth (chain, &sa->r_auth);
2283 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2285 ikev2_payload_add_notify (chain,
2286 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2287 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2288 ikev2_payload_add_auth (chain, &sa->r_auth);
2289 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2290 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2292 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2294 u8 *data = vec_new (u8, 1);
2296 data[0] = sa->unsupported_cp;
2297 ikev2_payload_add_notify (chain,
2298 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2302 else if (sa->state == IKEV2_STATE_SA_INIT)
2304 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2305 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2306 ikev2_payload_add_auth (chain, &sa->i_auth);
2307 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2308 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2309 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2310 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2315 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2319 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2321 /* if pending delete */
2324 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2326 if (sa->is_initiator)
2327 ikev2_payload_add_delete (chain, sa->del);
2329 /* The response to a request that deletes the IKE SA is an empty
2330 INFORMATIONAL response. */
2331 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2333 /* The response to a request that deletes ESP or AH SAs will contain
2334 delete payloads for the paired SAs going in the other direction. */
2337 ikev2_payload_add_delete (chain, sa->del);
2342 /* received N(AUTHENTICATION_FAILED) */
2343 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2345 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2348 /* received unsupported critical payload */
2349 else if (sa->unsupported_cp)
2351 u8 *data = vec_new (u8, 1);
2353 data[0] = sa->unsupported_cp;
2354 ikev2_payload_add_notify (chain,
2355 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2358 sa->unsupported_cp = 0;
2360 /* else send empty response */
2362 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2364 if (sa->is_initiator)
2367 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2368 ikev2_notify_t notify;
2369 u8 *data = vec_new (u8, 4);
2370 clib_memset (¬ify, 0, sizeof (notify));
2371 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2372 notify.spi = sa->childs[0].i_proposals->spi;
2373 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2375 ikev2_payload_add_sa (chain, proposals);
2376 ikev2_payload_add_nonce (chain, sa->i_nonce);
2377 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2378 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2379 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2386 if (vec_len (sa->rekey) > 0)
2388 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2389 ikev2_payload_add_nonce (chain, sa->r_nonce);
2390 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2392 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2394 vec_del1 (sa->rekey, 0);
2396 else if (sa->unsupported_cp)
2398 u8 *data = vec_new (u8, 1);
2400 data[0] = sa->unsupported_cp;
2401 ikev2_payload_add_notify (chain,
2402 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2405 sa->unsupported_cp = 0;
2409 ikev2_payload_add_notify (chain,
2410 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2417 ike->version = IKE_VERSION_2;
2418 ike->nextpayload = IKEV2_PAYLOAD_SK;
2419 tlen = sizeof (*ike);
2420 if (sa->is_initiator)
2422 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2423 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2427 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2431 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2433 tlen += vec_len (chain->data);
2434 ike->nextpayload = chain->first_payload_type;
2435 ike->length = clib_host_to_net_u32 (tlen);
2437 if (tlen + b->current_length + b->current_data > buffer_data_size)
2443 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2445 /* store whole IKE payload - needed for PSK auth */
2446 vec_reset_length (sa->last_sa_init_res_packet_data);
2447 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2451 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2452 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2455 plen = sizeof (*ph);
2456 ph = (ike_payload_header_t *) & ike->payload[0];
2457 ph->nextpayload = chain->first_payload_type;
2460 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2461 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2462 plen += vec_len (chain->data) + iv_len;
2464 /* add space for hmac/tag */
2466 plen += tr_integ->key_trunc;
2468 plen += IKEV2_GCM_ICV_SIZE;
2471 if (tlen + b->current_length + b->current_data > buffer_data_size)
2477 /* payload and total length */
2478 ph->length = clib_host_to_net_u16 (plen);
2479 ike->length = clib_host_to_net_u32 (tlen);
2483 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2484 ph->payload, (u8 *) ike,
2485 sizeof (*ike) + sizeof (*ph),
2486 ph->payload + plen - sizeof (*ph) -
2487 IKEV2_GCM_ICV_SIZE))
2495 if (!ikev2_encrypt_data
2496 (ptd, sa, tr_encr, chain->data, ph->payload))
2502 ikev2_calc_integr (tr_integ,
2503 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2504 (u8 *) ike, tlen - tr_integ->key_trunc);
2505 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2506 sizeof (*ike), integ, tr_integ->key_trunc);
2509 /* store whole IKE payload - needed for retransmit */
2510 vec_reset_length (sa->last_res_packet_data);
2511 vec_add (sa->last_res_packet_data, ike, tlen);
2515 ikev2_payload_destroy_chain (chain);
2521 ikev2_retransmit_sa_init (ike_header_t * ike, ip4_address_t iaddr,
2522 ip4_address_t raddr, u32 rlen)
2524 ikev2_main_t *km = &ikev2_main;
2526 u32 thread_index = vlib_get_thread_index ();
2529 pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
2530 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2531 sa->iaddr.as_u32 == iaddr.as_u32 &&
2532 sa->raddr.as_u32 == raddr.as_u32)
2535 u8 payload = ike->nextpayload;
2537 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2538 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2539 u32 plen = clib_net_to_host_u16 (ikep->length);
2540 if (plen > p + sizeof (*ike))
2543 if (plen < sizeof(ike_payload_header_t))
2546 if (payload == IKEV2_PAYLOAD_NONCE)
2548 if (!clib_memcmp(sa->i_nonce, ikep->payload,
2549 plen - sizeof(*ikep)))
2551 /* req is retransmit */
2552 if (sa->state == IKEV2_STATE_SA_INIT)
2554 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2555 u32 slen = clib_net_to_host_u32(tmp->length);
2556 ike->ispi = tmp->ispi;
2557 ike->rspi = tmp->rspi;
2558 ike->nextpayload = tmp->nextpayload;
2559 ike->version = tmp->version;
2560 ike->exchange = tmp->exchange;
2561 ike->flags = tmp->flags;
2562 ike->msgid = tmp->msgid;
2563 ike->length = tmp->length;
2564 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2565 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2566 "ispi %lx IKE_SA_INIT retransmit "
2567 "from %d.%d.%d.%d to %d.%d.%d.%d",
2569 raddr.as_u32, iaddr.as_u32);
2572 /* else ignore req */
2575 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2576 "ispi %lx IKE_SA_INIT ignore "
2577 "from %d.%d.%d.%d to %d.%d.%d.%d",
2579 raddr.as_u32, iaddr.as_u32);
2584 payload = ikep->nextpayload;
2591 /* req is not retransmit */
2596 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2598 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2601 if (msg_id > sa->last_msg_id)
2603 sa->last_msg_id = msg_id;
2607 /* retransmitted req */
2608 if (msg_id == sa->last_msg_id)
2610 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2611 u32 slen = clib_net_to_host_u32 (tmp->length);
2612 ike->ispi = tmp->ispi;
2613 ike->rspi = tmp->rspi;
2614 ike->nextpayload = tmp->nextpayload;
2615 ike->version = tmp->version;
2616 ike->exchange = tmp->exchange;
2617 ike->flags = tmp->flags;
2618 ike->msgid = tmp->msgid;
2619 ike->length = tmp->length;
2620 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2621 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2622 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2626 /* old req ignore */
2627 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2628 msg_id, sa->raddr.as_u32, sa->iaddr.as_u32);
2633 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2635 ikev2_main_t *km = &ikev2_main;
2636 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2637 sa->profile_index = ~0;
2641 ikev2_del_sa_init_from_main (u64 * ispi)
2643 ikev2_main_t *km = &ikev2_main;
2644 uword *p = hash_get (km->sa_by_ispi, *ispi);
2647 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2648 hash_unset (km->sa_by_ispi, sai->ispi);
2649 ikev2_sa_free_all_vec (sai);
2650 pool_put (km->sais, sai);
2655 ikev2_del_sa_init (u64 ispi)
2657 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2662 ikev2_node_fn (vlib_main_t * vm,
2663 vlib_node_runtime_t * node, vlib_frame_t * frame)
2665 u32 n_left = frame->n_vectors, *from;
2666 ikev2_main_t *km = &ikev2_main;
2667 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2668 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2669 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2672 from = vlib_frame_vector_args (frame);
2673 vlib_get_buffers (vm, from, bufs, n_left);
2678 vlib_buffer_t *b0 = b[0];
2679 next[0] = IKEV2_NEXT_ERROR_DROP;
2683 ikev2_sa_t *sa0 = 0;
2684 ikev2_sa_t sa; /* temporary store for SA */
2686 int is_req = 0, has_non_esp_marker = 0;
2688 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2690 u8 *ptr = vlib_buffer_get_current (b0);
2691 ip40 = (ip4_header_t *) ptr;
2692 ptr += sizeof (*ip40);
2693 udp0 = (udp_header_t *) ptr;
2694 ptr += sizeof (*udp0);
2695 ike0 = (ike_header_t *) ptr;
2699 ike0 = vlib_buffer_get_current (b0);
2700 vlib_buffer_advance (b0, -sizeof (*udp0));
2701 udp0 = vlib_buffer_get_current (b0);
2702 vlib_buffer_advance (b0, -sizeof (*ip40));
2703 ip40 = vlib_buffer_get_current (b0);
2706 rlen = b0->current_length - sizeof (*ip40) - sizeof (*udp0);
2708 /* check for non-esp marker */
2709 if (*((u32 *) ike0) == 0)
2712 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2713 rlen -= sizeof (ikev2_non_esp_marker);
2714 has_non_esp_marker = 1;
2717 if (clib_net_to_host_u32 (ike0->length) != rlen)
2719 vlib_node_increment_counter (vm, ikev2_node.index,
2720 IKEV2_ERROR_BAD_LENGTH, 1);
2724 if (ike0->version != IKE_VERSION_2)
2726 vlib_node_increment_counter (vm, ikev2_node.index,
2727 IKEV2_ERROR_NOT_IKEV2, 1);
2731 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2734 clib_memset (sa0, 0, sizeof (*sa0));
2736 if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2738 if (ike0->rspi == 0)
2740 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2741 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2742 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2745 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2749 vlib_node_increment_counter (vm, ikev2_node.index,
2752 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2754 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2759 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2761 vlib_node_increment_counter (vm, ikev2_node.index,
2762 IKEV2_ERROR_MALFORMED_PACKET,
2765 if (sa0->state == IKEV2_STATE_SA_INIT)
2767 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2769 ikev2_select_proposal (sa0->i_proposals,
2770 IKEV2_PROTOCOL_IKE);
2771 ikev2_generate_sa_init_data (sa0);
2774 if (sa0->state == IKEV2_STATE_SA_INIT
2775 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2777 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2779 vlib_node_increment_counter (vm, ikev2_node.index,
2780 IKEV2_ERROR_NO_BUFF_SPACE,
2784 if (sa0->state == IKEV2_STATE_SA_INIT)
2786 /* add SA to the pool */
2787 pool_get (ptd->sas, sa0);
2788 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2789 ikev2_init_sa (vm, sa0);
2790 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2794 ikev2_sa_free_all_vec (sa0);
2798 else //received sa_init without initiator flag
2800 sa0->raddr.as_u32 = ip40->src_address.as_u32;
2801 sa0->iaddr.as_u32 = ip40->dst_address.as_u32;
2802 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2804 if (sa0->state == IKEV2_STATE_SA_INIT)
2807 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2808 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2811 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2813 if (clib_atomic_bool_cmp_and_swap
2814 (&sai->init_response_received, 0, 1))
2816 ikev2_complete_sa_data (sa0, sai);
2817 ikev2_calc_keys (sa0);
2818 ikev2_sa_auth_init (sa0);
2820 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2822 vlib_node_increment_counter (vm,
2824 IKEV2_ERROR_NO_BUFF_SPACE,
2829 /* we've already processed sa-init response */
2830 sa0->state = IKEV2_STATE_UNKNOWN;
2835 if (sa0->state == IKEV2_STATE_SA_INIT)
2837 /* add SA to the pool */
2838 pool_get (ptd->sas, sa0);
2839 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2840 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2844 ikev2_sa_free_all_vec (sa0);
2848 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2851 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2854 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2855 slen = ikev2_retransmit_resp (sa0, ike0);
2858 vlib_node_increment_counter (vm, ikev2_node.index,
2861 IKEV2_ERROR_IKE_REQ_IGNORE
2863 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2868 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2869 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
2871 ikev2_sa_auth (sa0);
2873 vlib_node_increment_counter (vm, ikev2_node.index,
2874 IKEV2_ERROR_MALFORMED_PACKET, 1);
2875 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2877 ikev2_initial_contact_cleanup (sa0);
2878 ikev2_sa_match_ts (sa0);
2879 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2880 ikev2_create_tunnel_interface (vm, sa0,
2885 if (sa0->is_initiator)
2887 ikev2_del_sa_init (sa0->ispi);
2891 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2893 vlib_node_increment_counter (vm, ikev2_node.index,
2894 IKEV2_ERROR_NO_BUFF_SPACE,
2899 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2902 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2905 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2906 slen = ikev2_retransmit_resp (sa0, ike0);
2909 vlib_node_increment_counter (vm, ikev2_node.index,
2912 IKEV2_ERROR_IKE_REQ_IGNORE
2914 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2919 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
2922 vlib_node_increment_counter (vm, ikev2_node.index,
2923 IKEV2_ERROR_MALFORMED_PACKET,
2931 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2933 ikev2_delete_t *d, *tmp, *resp = 0;
2934 vec_foreach (d, sa0->del)
2936 ikev2_child_sa_t *ch_sa;
2937 ch_sa = ikev2_sa_get_child (sa0, d->spi,
2939 !sa0->is_initiator);
2942 ikev2_delete_tunnel_interface (km->vnet_main,
2944 if (!sa0->is_initiator)
2946 vec_add2 (resp, tmp, 1);
2947 tmp->protocol_id = d->protocol_id;
2948 tmp->spi = ch_sa->r_proposals[0].spi;
2950 ikev2_sa_del_child_sa (sa0, ch_sa);
2953 if (!sa0->is_initiator)
2955 vec_free (sa0->del);
2960 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
2962 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
2963 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2965 vlib_node_increment_counter (vm, ikev2_node.index,
2966 IKEV2_ERROR_NO_BUFF_SPACE,
2971 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2974 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2977 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2978 slen = ikev2_retransmit_resp (sa0, ike0);
2981 vlib_node_increment_counter (vm, ikev2_node.index,
2984 IKEV2_ERROR_IKE_REQ_IGNORE
2986 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2991 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
2994 vlib_node_increment_counter (vm, ikev2_node.index,
2995 IKEV2_ERROR_MALFORMED_PACKET,
3003 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3006 ikev2_sa_free_all_child_sa (&sa0->childs);
3007 ikev2_child_sa_t *child;
3008 vec_add2 (sa0->childs, child, 1);
3009 clib_memset (child, 0, sizeof (*child));
3010 child->r_proposals = sa0->rekey[0].r_proposal;
3011 child->i_proposals = sa0->rekey[0].i_proposal;
3012 child->tsi = sa0->rekey[0].tsi;
3013 child->tsr = sa0->rekey[0].tsr;
3014 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3015 child - sa0->childs, 1);
3017 if (sa0->is_initiator)
3019 vec_free (sa0->rekey);
3023 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3025 vlib_node_increment_counter (vm, ikev2_node.index,
3026 IKEV2_ERROR_NO_BUFF_SPACE,
3034 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
3035 "received from %d.%d.%d.%d to %d.%d.%d.%d",
3037 ip40->src_address.as_u32,
3038 ip40->dst_address.as_u32);
3042 /* if we are sending packet back, rewrite headers */
3043 if (slen && ~0 != slen)
3045 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3046 if (sa0->is_initiator)
3048 ip40->dst_address.as_u32 = sa0->raddr.as_u32;
3049 ip40->src_address.as_u32 = sa0->iaddr.as_u32;
3053 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
3054 ip40->src_address.as_u32 = sa0->raddr.as_u32;
3059 udp0->dst_port = udp0->src_port =
3060 clib_net_to_host_u16 (ikev2_get_port (sa0));
3062 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3065 if (!has_non_esp_marker)
3066 slen = ikev2_insert_non_esp_marker (ike0, slen);
3071 if (has_non_esp_marker)
3072 slen += sizeof (ikev2_non_esp_marker);
3074 u16 tp = udp0->dst_port;
3075 udp0->dst_port = udp0->src_port;
3076 udp0->src_port = tp;
3079 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3081 b0->current_length =
3082 slen + sizeof (ip4_header_t) + sizeof (udp_header_t);
3083 ip40->length = clib_host_to_net_u16 (b0->current_length);
3084 ip40->checksum = ip4_header_checksum (ip40);
3087 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3088 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3090 ikev2_child_sa_t *c;
3092 vec_foreach (c, sa0->childs)
3093 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3095 ikev2_delete_sa (sa0);
3097 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3098 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3101 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3102 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3103 t->next_index = next[0];
3110 vlib_node_increment_counter (vm, ikev2_node.index,
3111 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3112 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3113 return frame->n_vectors;
3117 VLIB_REGISTER_NODE (ikev2_node,static) = {
3118 .function = ikev2_node_fn,
3120 .vector_size = sizeof (u32),
3121 .format_trace = format_ikev2_trace,
3122 .type = VLIB_NODE_TYPE_INTERNAL,
3124 .n_errors = ARRAY_LEN(ikev2_error_strings),
3125 .error_strings = ikev2_error_strings,
3127 .n_next_nodes = IKEV2_N_NEXT,
3130 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3131 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
3136 // set ikev2 proposals when vpp is used as initiator
3137 static clib_error_t *
3138 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3139 ikev2_transforms_set * ts,
3140 ikev2_sa_proposal_t ** proposals, int is_ike)
3143 ikev2_main_t *km = &ikev2_main;
3144 ikev2_sa_proposal_t *proposal;
3145 vec_add2 (*proposals, proposal, 1);
3146 ikev2_sa_transform_t *td;
3151 vec_foreach (td, km->supported_transforms)
3153 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3154 && td->encr_type == ts->crypto_alg
3155 && td->key_len == ts->crypto_key_size / 8)
3158 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3159 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3160 vec_add (td->attrs, (u8 *) attr, 4);
3161 vec_add1 (proposal->transforms, *td);
3170 r = clib_error_return (0, "Unsupported algorithm");
3174 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3178 vec_foreach (td, km->supported_transforms)
3180 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3181 && td->integ_type == ts->integ_alg)
3183 vec_add1 (proposal->transforms, *td);
3191 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3192 r = clib_error_return (0, "Unsupported algorithm");
3201 vec_foreach (td, km->supported_transforms)
3203 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3204 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3206 vec_add1 (proposal->transforms, *td);
3213 r = clib_error_return (0, "Unsupported algorithm");
3222 vec_foreach (td, km->supported_transforms)
3224 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3226 vec_add1 (proposal->transforms, *td);
3229 sa->dh_group = td->dh_type;
3237 r = clib_error_return (0, "Unsupported algorithm");
3245 vec_foreach (td, km->supported_transforms)
3247 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3249 vec_add1 (proposal->transforms, *td);
3255 r = clib_error_return (0, "Unsupported algorithm");
3264 static ikev2_profile_t *
3265 ikev2_profile_index_by_name (u8 * name)
3267 ikev2_main_t *km = &ikev2_main;
3270 p = mhash_get (&km->profile_index_by_name, name);
3274 return pool_elt_at_index (km->profiles, p[0]);
3279 ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
3280 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3288 b0 = vlib_get_buffer (vm, bi0);
3289 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3290 udp0 = vlib_buffer_get_current (b0);
3291 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3292 ip40 = vlib_buffer_get_current (b0);
3295 ip40->ip_version_and_header_length = 0x45;
3297 ip40->fragment_id = 0;
3298 ip40->flags_and_fragment_offset = 0;
3300 ip40->protocol = IP_PROTOCOL_UDP;
3301 ip40->dst_address.as_u32 = dst->as_u32;
3302 ip40->src_address.as_u32 = src->as_u32;
3303 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3304 udp0->src_port = clib_host_to_net_u16 (src_port);
3305 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3307 b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3308 ip40->length = clib_host_to_net_u16 (b0->current_length);
3309 ip40->checksum = ip4_header_checksum (ip40);
3311 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3312 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3314 /* send the request */
3315 f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
3316 to_next = vlib_frame_vector_args (f);
3319 vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
3324 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3327 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3332 *b = vlib_get_buffer (vm, bi0);
3337 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3339 ikev2_main_t *km = &ikev2_main;
3342 EVP_PKEY_free (km->pkey);
3343 km->pkey = ikev2_load_key_file (file);
3344 if (km->pkey == NULL)
3345 return clib_error_return (0, "load key '%s' failed", file);
3350 static_always_inline vnet_api_error_t
3351 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3353 ikev2_main_t *km = &ikev2_main;
3354 udp_dst_port_info_t *pi;
3356 uword *v = hash_get (km->udp_ports, port);
3357 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3361 /* IKE already uses this port, only increment reference counter */
3368 return VNET_API_ERROR_UDP_PORT_TAKEN;
3370 udp_register_dst_port (km->vlib_main, port,
3371 ipsec4_tun_input_node.index, 1);
3372 hash_set (km->udp_ports, port, 1);
3374 p->ipsec_over_udp_port = port;
3378 static_always_inline void
3379 ikev2_unregister_udp_port (ikev2_profile_t * p)
3381 ikev2_main_t *km = &ikev2_main;
3384 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3387 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3395 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3396 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3399 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3403 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3404 ikev2_main_per_thread_data_t * tkm,
3407 ikev2_main_t *km = &ikev2_main;
3408 ip4_address_t *src, *dst;
3411 /* Create the Initiator notification for IKE SA removal */
3416 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3419 ikev2_log_error ("buffer alloc failure");
3423 ike0 = vlib_buffer_get_current (b0);
3424 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3425 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3426 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3427 vec_resize (sa->del, 1);
3428 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3429 sa->del->spi = sa->ispi;
3430 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3431 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3432 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3436 if (sa->is_initiator)
3447 ikev2_send_ike (vm, src, dst, bi0, len,
3448 ikev2_get_port (sa), sa->dst_port, 0);
3450 /* delete local SA */
3451 ikev2_child_sa_t *c;
3452 vec_foreach (c, sa->childs)
3453 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3455 u64 rspi = sa->rspi;
3456 ikev2_sa_free_all_vec (sa);
3457 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3460 hash_unset (tkm->sa_by_rspi, rspi);
3461 pool_put (tkm->sas, sa);
3466 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3468 ikev2_main_per_thread_data_t *tkm;
3470 u32 pi = p - km->profiles;
3475 pool_foreach(sa, km->sais, ({
3476 if (pi == sa->profile_index)
3477 vec_add1 (del_sai, sa - km->sais);
3481 vec_foreach (sai, del_sai)
3483 sa = pool_elt_at_index (km->sais, sai[0]);
3484 ikev2_sa_free_all_vec (sa);
3485 hash_unset (km->sa_by_ispi, sa->ispi);
3486 pool_put (km->sais, sa);
3488 vec_reset_length (del_sai);
3490 vec_foreach (tkm, km->per_thread_data)
3493 pool_foreach (sa, tkm->sas, ({
3494 if (sa->profile_index != ~0 && pi == sa->profile_index)
3495 vec_add1 (del_sai, sa - tkm->sas);
3499 vec_foreach (sai, del_sai)
3501 sa = pool_elt_at_index (tkm->sas, sai[0]);
3502 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3505 vec_reset_length (del_sai);
3512 ikev2_profile_free (ikev2_profile_t * p)
3516 vec_free (p->auth.data);
3518 EVP_PKEY_free (p->auth.key);
3520 vec_free (p->loc_id.data);
3521 vec_free (p->rem_id.data);
3525 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3527 ikev2_main_t *km = &ikev2_main;
3532 if (ikev2_profile_index_by_name (name))
3533 return clib_error_return (0, "policy %v already exists", name);
3535 pool_get (km->profiles, p);
3536 clib_memset (p, 0, sizeof (*p));
3537 p->name = vec_dup (name);
3538 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3539 p->responder.sw_if_index = ~0;
3541 uword index = p - km->profiles;
3542 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3546 p = ikev2_profile_index_by_name (name);
3548 return clib_error_return (0, "policy %v does not exists", name);
3550 ikev2_unregister_udp_port (p);
3551 ikev2_cleanup_profile_sessions (km, p);
3553 ikev2_profile_free (p);
3554 pool_put (km->profiles, p);
3555 mhash_unset (&km->profile_index_by_name, name, 0);
3561 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3562 u8 * auth_data, u8 data_hex_format)
3567 p = ikev2_profile_index_by_name (name);
3571 r = clib_error_return (0, "unknown profile %v", name);
3576 EVP_PKEY_free (p->auth.key);
3577 vec_free (p->auth.data);
3579 p->auth.method = auth_method;
3580 p->auth.data = vec_dup (auth_data);
3581 p->auth.hex = data_hex_format;
3583 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3585 vec_add1 (p->auth.data, 0);
3586 p->auth.key = ikev2_load_cert_file (p->auth.data);
3587 if (p->auth.key == NULL)
3588 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3595 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3601 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
3602 && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
3604 r = clib_error_return (0, "unsupported identity type %U",
3605 format_ikev2_id_type, id_type);
3609 p = ikev2_profile_index_by_name (name);
3613 r = clib_error_return (0, "unknown profile %v", name);
3619 vec_free (p->loc_id.data);
3620 p->loc_id.type = id_type;
3621 p->loc_id.data = vec_dup (data);
3625 vec_free (p->rem_id.data);
3626 p->rem_id.type = id_type;
3627 p->rem_id.data = vec_dup (data);
3634 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3635 u16 start_port, u16 end_port, ip4_address_t start_addr,
3636 ip4_address_t end_addr, int is_local)
3641 p = ikev2_profile_index_by_name (name);
3645 r = clib_error_return (0, "unknown profile %v", name);
3651 p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
3652 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
3653 p->loc_ts.start_port = start_port;
3654 p->loc_ts.end_port = end_port;
3655 p->loc_ts.protocol_id = protocol_id;
3656 p->loc_ts.ts_type = 7;
3660 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
3661 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
3662 p->rem_ts.start_port = start_port;
3663 p->rem_ts.end_port = end_port;
3664 p->rem_ts.protocol_id = protocol_id;
3665 p->rem_ts.ts_type = 7;
3673 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3674 u32 sw_if_index, ip4_address_t ip4)
3679 p = ikev2_profile_index_by_name (name);
3683 r = clib_error_return (0, "unknown profile %v", name);
3687 p->responder.sw_if_index = sw_if_index;
3688 p->responder.ip4 = ip4;
3694 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3695 ikev2_transform_encr_type_t crypto_alg,
3696 ikev2_transform_integ_type_t integ_alg,
3697 ikev2_transform_dh_type_t dh_type,
3698 u32 crypto_key_size)
3703 p = ikev2_profile_index_by_name (name);
3707 r = clib_error_return (0, "unknown profile %v", name);
3711 p->ike_ts.crypto_alg = crypto_alg;
3712 p->ike_ts.integ_alg = integ_alg;
3713 p->ike_ts.dh_type = dh_type;
3714 p->ike_ts.crypto_key_size = crypto_key_size;
3719 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3720 ikev2_transform_encr_type_t crypto_alg,
3721 ikev2_transform_integ_type_t integ_alg,
3722 u32 crypto_key_size)
3727 p = ikev2_profile_index_by_name (name);
3731 r = clib_error_return (0, "unknown profile %v", name);
3735 p->esp_ts.crypto_alg = crypto_alg;
3736 p->esp_ts.integ_alg = integ_alg;
3737 p->esp_ts.crypto_key_size = crypto_key_size;
3742 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3743 u8 * name, u32 sw_if_index)
3748 p = ikev2_profile_index_by_name (name);
3752 r = clib_error_return (0, "unknown profile %v", name);
3756 p->tun_itf = sw_if_index;
3762 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3765 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3766 ikev2_main_t *km = &ikev2_main;
3767 vnet_api_error_t rv = 0;
3771 return VNET_API_ERROR_INVALID_VALUE;
3775 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3776 return VNET_API_ERROR_VALUE_EXIST;
3778 rv = ikev2_register_udp_port (p, port);
3782 v = hash_get (km->udp_ports, port);
3784 return VNET_API_ERROR_IKE_NO_PORT;
3786 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3787 return VNET_API_ERROR_INVALID_VALUE;
3789 ikev2_unregister_udp_port (p);
3795 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3797 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3802 r = clib_error_return (0, "unknown profile %v", name);
3811 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3812 u64 lifetime, u32 jitter, u32 handover,
3818 p = ikev2_profile_index_by_name (name);
3822 r = clib_error_return (0, "unknown profile %v", name);
3826 p->lifetime = lifetime;
3827 p->lifetime_jitter = jitter;
3828 p->handover = handover;
3829 p->lifetime_maxdata = maxdata;
3834 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
3838 ip4_main_t *im = &ip4_main;
3839 ikev2_main_t *km = &ikev2_main;
3841 p = ikev2_profile_index_by_name (name);
3845 r = clib_error_return (0, "unknown profile %v", name);
3849 if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
3851 r = clib_error_return (0, "responder not set for profile %v", name);
3856 /* Create the Initiator Request */
3861 ip_lookup_main_t *lm = &im->lookup_main;
3863 int len = sizeof (ike_header_t);
3865 /* Get own iface IP */
3867 lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
3868 ip_interface_address_t *if_add =
3869 pool_elt_at_index (lm->if_address_pool, if_add_index0);
3870 ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
3872 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3875 char *errmsg = "buffer alloc failure";
3876 ikev2_log_error (errmsg);
3877 return clib_error_return (0, errmsg);
3879 ike0 = vlib_buffer_get_current (b0);
3881 /* Prepare the SA and the IKE payload */
3883 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
3884 ikev2_payload_chain_t *chain = 0;
3885 ikev2_payload_new_chain (chain);
3887 /* Build the IKE proposal payload */
3888 ikev2_sa_proposal_t *proposals = 0;
3889 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
3890 proposals[0].proposal_num = 1;
3891 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
3893 /* Add and then cleanup proposal data */
3894 ikev2_payload_add_sa (chain, proposals);
3895 ikev2_sa_free_proposal_vector (&proposals);
3897 sa.is_initiator = 1;
3898 sa.profile_index = p - km->profiles;
3899 sa.state = IKEV2_STATE_SA_INIT;
3900 sa.tun_itf = p->tun_itf;
3901 sa.udp_encap = p->udp_encap;
3902 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
3903 sa.is_tun_itf_set = 1;
3904 sa.initial_contact = 1;
3905 sa.dst_port = IKEV2_PORT;
3906 ikev2_generate_sa_init_data (&sa);
3907 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
3908 ikev2_payload_add_nonce (chain, sa.i_nonce);
3910 /* Build the child SA proposal */
3911 vec_resize (sa.childs, 1);
3912 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
3913 &sa.childs[0].i_proposals, 0);
3914 sa.childs[0].i_proposals[0].proposal_num = 1;
3915 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
3916 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
3917 sizeof (sa.childs[0].i_proposals[0].spi));
3919 /* Add NAT detection notification messages (mandatory) */
3920 u8 *nat_detection_sha1 =
3921 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3922 clib_host_to_net_u64 (sa.rspi),
3924 clib_host_to_net_u16 (IKEV2_PORT));
3926 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
3927 nat_detection_sha1);
3928 vec_free (nat_detection_sha1);
3929 nat_detection_sha1 =
3930 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
3931 clib_host_to_net_u64 (sa.rspi),
3932 p->responder.ip4.as_u32,
3933 clib_host_to_net_u16 (sa.dst_port));
3934 ikev2_payload_add_notify (chain,
3935 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
3936 nat_detection_sha1);
3937 vec_free (nat_detection_sha1);
3939 u8 *sig_hash_algo = vec_new (u8, 8);
3940 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3941 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3942 ikev2_payload_add_notify (chain,
3943 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3945 vec_free (sig_hash_algo);
3948 /* Buffer update and boilerplate */
3949 len += vec_len (chain->data);
3950 ike0->nextpayload = chain->first_payload_type;
3951 ike0->length = clib_host_to_net_u32 (len);
3952 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
3953 ikev2_payload_destroy_chain (chain);
3955 ike0->version = IKE_VERSION_2;
3956 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3957 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3958 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
3962 /* store whole IKE payload - needed for PSK auth */
3963 vec_reset_length (sa.last_sa_init_req_packet_data);
3964 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3966 /* add data to the SA then add it to the pool */
3967 sa.iaddr.as_u32 = if_ip->as_u32;
3968 sa.raddr.as_u32 = p->responder.ip4.as_u32;
3969 sa.i_id.type = p->loc_id.type;
3970 sa.i_id.data = vec_dup (p->loc_id.data);
3971 sa.r_id.type = p->rem_id.type;
3972 sa.r_id.data = vec_dup (p->rem_id.data);
3973 sa.i_auth.method = p->auth.method;
3974 sa.i_auth.hex = p->auth.hex;
3975 sa.i_auth.data = vec_dup (p->auth.data);
3976 sa.sw_if_index = p->responder.sw_if_index;
3977 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3978 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3980 ikev2_initial_contact_cleanup (&sa);
3982 /* add SA to the pool */
3983 ikev2_sa_t *sa0 = 0;
3984 pool_get (km->sais, sa0);
3985 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3986 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3988 ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len,
3989 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
3991 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to "
3992 "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0,
3993 p->responder.ip4.as_u32);
4000 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4001 ikev2_child_sa_t * csa)
4003 /* Create the Initiator notification for child SA removal */
4004 ikev2_main_t *km = &ikev2_main;
4010 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4013 ikev2_log_error ("buffer alloc failure");
4017 ike0 = vlib_buffer_get_current (b0);
4018 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4019 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4020 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4021 vec_resize (sa->del, 1);
4022 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4023 sa->del->spi = csa->i_proposals->spi;
4024 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4025 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4026 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4031 len = ikev2_insert_non_esp_marker (ike0, len);
4032 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4033 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4035 /* delete local child SA */
4036 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4037 ikev2_sa_del_child_sa (sa, csa);
4041 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4044 ikev2_main_t *km = &ikev2_main;
4045 ikev2_main_per_thread_data_t *tkm;
4046 ikev2_sa_t *fsa = 0;
4047 ikev2_child_sa_t *fchild = 0;
4049 /* Search for the child SA */
4050 vec_foreach (tkm, km->per_thread_data)
4056 pool_foreach (sa, tkm->sas, ({
4057 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4067 if (!fchild || !fsa)
4069 r = clib_error_return (0, "Child SA not found");
4074 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4081 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4084 ikev2_main_t *km = &ikev2_main;
4085 ikev2_main_per_thread_data_t *tkm;
4086 ikev2_sa_t *fsa = 0;
4087 ikev2_main_per_thread_data_t *ftkm = 0;
4089 /* Search for the IKE SA */
4090 vec_foreach (tkm, km->per_thread_data)
4096 pool_foreach (sa, tkm->sas, ({
4097 if (sa->ispi == ispi)
4109 r = clib_error_return (0, "IKE SA not found");
4113 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
4118 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4119 ikev2_child_sa_t * csa)
4121 /* Create the Initiator request for create child SA */
4127 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4130 ikev2_log_error ("buffer alloc failure");
4134 ike0 = vlib_buffer_get_current (b0);
4135 ike0->version = IKE_VERSION_2;
4136 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4137 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4138 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4139 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4140 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4141 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4143 ikev2_rekey_t *rekey;
4144 vec_add2 (sa->rekey, rekey, 1);
4145 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4148 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4149 rekey->spi = proposals[0].spi;
4150 rekey->ispi = csa->i_proposals->spi;
4151 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4156 len = ikev2_insert_non_esp_marker (ike0, len);
4157 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4158 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4159 vec_free (proposals);
4163 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4166 ikev2_main_t *km = &ikev2_main;
4167 ikev2_main_per_thread_data_t *tkm;
4168 ikev2_sa_t *fsa = 0;
4169 ikev2_child_sa_t *fchild = 0;
4171 /* Search for the child SA */
4172 vec_foreach (tkm, km->per_thread_data)
4178 pool_foreach (sa, tkm->sas, ({
4179 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4189 if (!fchild || !fsa)
4191 r = clib_error_return (0, "Child SA not found");
4196 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4203 ikev2_init (vlib_main_t * vm)
4205 ikev2_main_t *km = &ikev2_main;
4206 vlib_thread_main_t *tm = vlib_get_thread_main ();
4209 clib_memset (km, 0, sizeof (ikev2_main_t));
4210 km->vnet_main = vnet_get_main ();
4213 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4214 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4215 ikev2_crypto_init (km);
4217 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4219 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4220 CLIB_CACHE_LINE_BYTES);
4221 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4223 ikev2_main_per_thread_data_t *ptd =
4224 vec_elt_at_index (km->per_thread_data, thread_id);
4226 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4228 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4229 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4230 ptd->hmac_ctx = HMAC_CTX_new ();
4232 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4233 ptd->evp_ctx = &ptd->_evp_ctx;
4234 HMAC_CTX_init (&(ptd->_hmac_ctx));
4235 ptd->hmac_ctx = &ptd->_hmac_ctx;
4239 km->sa_by_ispi = hash_create (0, sizeof (uword));
4240 km->sw_if_indices = hash_create (0, 0);
4241 km->udp_ports = hash_create (0, sizeof (uword));
4243 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1);
4244 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1);
4246 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2");
4247 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4249 ikev2_cli_reference ();
4251 km->log_level = IKEV2_LOG_ERROR;
4252 km->log_class = vlib_log_register_class ("ikev2", 0);
4257 VLIB_INIT_FUNCTION (ikev2_init) =
4259 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4264 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4267 ikev2_main_t *km = &ikev2_main;
4268 ikev2_profile_t *p = 0;
4269 vlib_main_t *vm = km->vlib_main;
4270 f64 now = vlib_time_now (vm);
4273 if (sa->profile_index != ~0)
4274 p = pool_elt_at_index (km->profiles, sa->profile_index);
4276 if (sa->is_initiator && p && csa->time_to_expiration
4277 && now > csa->time_to_expiration)
4279 if (!csa->is_expired || csa->rekey_retries > 0)
4281 ikev2_rekey_child_sa_internal (vm, sa, csa);
4282 csa->time_to_expiration = now + p->handover;
4283 csa->is_expired = 1;
4284 if (csa->rekey_retries == 0)
4286 csa->rekey_retries = 5;
4288 else if (csa->rekey_retries > 0)
4290 csa->rekey_retries--;
4291 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4292 csa->i_proposals->spi, csa->rekey_retries);
4293 if (csa->rekey_retries == 0)
4295 csa->rekey_retries = -1;
4302 csa->time_to_expiration = 0;
4303 ikev2_delete_child_sa_internal (vm, sa, csa);
4311 ipip_tunnel_t *ipip = NULL;
4312 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4313 if (~0 == sw_if_index)
4315 ip46_address_t local_ip;
4316 ip46_address_t remote_ip;
4317 if (sa->is_initiator)
4319 ip46_address_set_ip4 (&local_ip, &sa->iaddr);
4320 ip46_address_set_ip4 (&remote_ip, &sa->raddr);
4324 ip46_address_set_ip4 (&local_ip, &sa->raddr);
4325 ip46_address_set_ip4 (&remote_ip, &sa->iaddr);
4329 ipip_tunnel_key_t key = {
4332 .transport = IPIP_TRANSPORT_IP4,
4337 ipip = ipip_tunnel_db_find (&key);
4340 sw_if_index = ipip->sw_if_index;
4346 vec_add1 (sas_in, csa->remote_sa_id);
4347 vlib_worker_thread_barrier_sync (vm);
4348 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4349 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4350 vlib_worker_thread_barrier_release (vm);
4357 ikev2_set_log_level (ikev2_log_level_t log_level)
4359 ikev2_main_t *km = &ikev2_main;
4361 if (log_level >= IKEV2_LOG_MAX)
4363 ikev2_log_error ("unknown logging level %d", log_level);
4367 km->log_level = log_level;
4372 ikev2_set_liveness_params (u32 period, u32 max_retries)
4374 ikev2_main_t *km = &ikev2_main;
4376 if (period == 0 || max_retries == 0)
4377 return clib_error_return (0, "invalid args");
4379 km->liveness_period = period;
4380 km->liveness_max_retries = max_retries;
4385 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4387 ikev2_main_t *km = &ikev2_main;
4388 vlib_main_t *vm = km->vlib_main;
4389 ikev2_main_per_thread_data_t *tkm;
4390 ikev2_sa_t *fsa = 0;
4391 ikev2_profile_t *p = 0;
4392 ikev2_child_sa_t *fchild = 0;
4393 f64 now = vlib_time_now (vm);
4394 vlib_counter_t counts;
4396 /* Search for the SA and child SA */
4397 vec_foreach (tkm, km->per_thread_data)
4403 pool_foreach (sa, tkm->sas, ({
4404 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4413 vlib_get_combined_counter (&ipsec_sa_counters,
4414 ipsec_sa->stat_index, &counts);
4416 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4417 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4419 if (fchild && p && p->lifetime_maxdata)
4421 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4423 fchild->time_to_expiration = now;
4429 ikev2_process_pending_sa_init (ikev2_main_t * km)
4436 hash_foreach (ispi, sai, km->sa_by_ispi,
4438 sa = pool_elt_at_index (km->sais, sai);
4439 if (sa->init_response_received)
4443 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4446 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4447 clib_memcpy_fast (vlib_buffer_get_current (b),
4448 sa->last_sa_init_req_packet_data,
4449 vec_len (sa->last_sa_init_req_packet_data));
4450 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4451 vec_len (sa->last_sa_init_req_packet_data),
4452 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4457 static vlib_node_registration_t ikev2_mngr_process_node;
4460 ikev2_send_informational_request (ikev2_sa_t * sa)
4462 ikev2_main_t *km = &ikev2_main;
4463 ip4_address_t *src, *dst;
4470 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4473 ikev2_log_error ("buffer alloc failure");
4477 ike0 = vlib_buffer_get_current (b0);
4478 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4479 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4480 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4481 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4482 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4483 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4488 len = ikev2_insert_non_esp_marker (ike0, len);
4490 if (sa->is_initiator)
4501 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4502 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4506 static_always_inline int
4507 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4509 ikev2_main_t *km = &ikev2_main;
4510 vlib_main_t *vm = km->vlib_main;
4512 if (!sa->keys_generated)
4515 if (sa->liveness_retries >= km->liveness_max_retries)
4518 f64 now = vlib_time_now (vm);
4520 if (sa->liveness_period_check < now)
4522 sa->liveness_retries++;
4523 sa->liveness_period_check = now + km->liveness_period;
4524 ikev2_send_informational_request (sa);
4530 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4533 ikev2_main_t *km = &ikev2_main;
4534 ipsec_main_t *im = &ipsec_main;
4536 ikev2_child_sa_t *c;
4542 vlib_process_wait_for_event_or_clock (vm, 1);
4543 vlib_process_get_events (vm, NULL);
4545 /* process ike child sas */
4546 ikev2_main_per_thread_data_t *tkm;
4547 vec_foreach (tkm, km->per_thread_data)
4550 u32 *to_be_deleted = 0;
4553 pool_foreach (sa, tkm->sas, ({
4554 ikev2_child_sa_t *c;
4556 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4558 sa->old_remote_id_present = 0;
4562 sa->old_id_expiration -= 1;
4564 vec_foreach (c, sa->childs)
4566 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4569 if (ikev2_mngr_process_responder_sas (sa))
4570 vec_add1 (to_be_deleted, sa - tkm->sas);
4574 vec_foreach (sai, to_be_deleted)
4576 sa = pool_elt_at_index (tkm->sas, sai[0]);
4577 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4578 vec_foreach (c, sa->childs)
4580 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4581 ikev2_sa_del_child_sa (sa, c);
4583 ikev2_sa_free_all_vec (sa);
4584 hash_unset (tkm->sa_by_rspi, sa->rspi);
4585 pool_put (tkm->sas, sa);
4589 p = pool_elt_at_index (km->profiles, sa->profile_index);
4592 ikev2_initiate_sa_init (vm, p->name);
4596 vec_free (to_be_deleted);
4599 /* process ipsec sas */
4602 pool_foreach (sa, im->sad, ({
4603 ikev2_mngr_process_ipsec_sa(sa);
4607 ikev2_process_pending_sa_init (km);
4611 vlib_process_wait_for_event_or_clock (vm, 5);
4612 vlib_process_get_events (vm, NULL);
4621 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4622 .function = ikev2_mngr_process_fn,
4623 .type = VLIB_NODE_TYPE_PROCESS,
4625 "ikev2-manager-process",
4628 VLIB_PLUGIN_REGISTER () = {
4629 .version = VPP_BUILD_VER,
4630 .description = "Internet Key Exchange (IKEv2) Protocol",
4635 * fd.io coding-style-patch-verification: ON
4638 * eval: (c-set-style "gnu")