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 <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <vnet/ipsec/ipsec_tun.h>
26 #include <vnet/ipip/ipip.h>
27 #include <plugins/ikev2/ikev2.h>
28 #include <plugins/ikev2/ikev2_priv.h>
29 #include <openssl/sha.h>
30 #include <vnet/ipsec/ipsec_punt.h>
32 #define IKEV2_LIVENESS_RETRIES 3
33 #define IKEV2_LIVENESS_PERIOD_CHECK 30
35 ikev2_main_t ikev2_main;
37 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
39 ikev2_child_sa_t * child);
41 #define ikev2_set_state(sa, v) do { \
43 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
53 format_ikev2_trace (u8 * s, va_list * args)
55 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
57 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
59 s = format (s, "ikev2: sw_if_index %d, next index %d",
60 t->sw_if_index, t->next_index);
64 #define foreach_ikev2_error \
65 _(PROCESSED, "IKEv2 packets processed") \
66 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
67 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
68 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
69 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
70 _(NOT_IKEV2, "Non IKEv2 packets received") \
71 _(BAD_LENGTH, "Bad packet length") \
72 _(MALFORMED_PACKET, "Malformed packet") \
73 _(NO_BUFF_SPACE, "No buffer space")
77 #define _(sym,str) IKEV2_ERROR_##sym,
83 static char *ikev2_error_strings[] = {
84 #define _(sym,string) string,
91 IKEV2_NEXT_IP4_LOOKUP,
92 IKEV2_NEXT_IP4_ERROR_DROP,
98 IKEV2_NEXT_IP6_LOOKUP,
99 IKEV2_NEXT_IP6_ERROR_DROP,
103 typedef u32 ikev2_non_esp_marker;
105 static_always_inline u16
106 ikev2_get_port (ikev2_sa_t * sa)
108 return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT;
111 static_always_inline int
112 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
114 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
115 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
116 return len + sizeof (ikev2_non_esp_marker);
119 static ikev2_sa_transform_t *
120 ikev2_find_transform_data (ikev2_sa_transform_t * t)
122 ikev2_main_t *km = &ikev2_main;
123 ikev2_sa_transform_t *td;
125 vec_foreach (td, km->supported_transforms)
127 if (td->type != t->type)
130 if (td->transform_id != t->transform_id)
133 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
135 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
136 || t->attrs[1] != 14)
139 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
147 static ikev2_sa_proposal_t *
148 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
149 ikev2_protocol_id_t prot_id)
151 ikev2_sa_proposal_t *rv = 0;
152 ikev2_sa_proposal_t *proposal;
153 ikev2_sa_transform_t *transform, *new_t;
154 u8 mandatory_bitmap, optional_bitmap;
156 if (prot_id == IKEV2_PROTOCOL_IKE)
158 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
159 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
160 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
162 else if (prot_id == IKEV2_PROTOCOL_ESP)
164 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
165 (1 << IKEV2_TRANSFORM_TYPE_ESN);
166 optional_bitmap = mandatory_bitmap |
167 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
169 else if (prot_id == IKEV2_PROTOCOL_AH)
171 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
172 (1 << IKEV2_TRANSFORM_TYPE_ESN);
173 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
178 vec_add2 (rv, proposal, 1);
180 vec_foreach (proposal, proposals)
183 if (proposal->protocol_id != prot_id)
186 vec_foreach (transform, proposal->transforms)
188 if ((1 << transform->type) & bitmap)
191 if (ikev2_find_transform_data (transform))
193 bitmap |= 1 << transform->type;
194 vec_add2 (rv->transforms, new_t, 1);
195 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
196 new_t->attrs = vec_dup (transform->attrs);
200 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
201 (bitmap & ~optional_bitmap) == 0)
203 rv->proposal_num = proposal->proposal_num;
204 rv->protocol_id = proposal->protocol_id;
205 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
210 vec_free (rv->transforms);
219 ikev2_sa_transform_t *
220 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
221 ikev2_transform_type_t type)
223 ikev2_sa_transform_t *t;
228 vec_foreach (t, p->transforms)
231 return ikev2_find_transform_data (t);
237 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
241 vec_foreach (c, sa->childs)
243 ikev2_sa_proposal_t *proposal =
244 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
245 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
253 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
255 ikev2_sa_proposal_t *p;
256 ikev2_sa_transform_t *t;
263 vec_foreach (t, p->transforms)
267 vec_free (p->transforms);
273 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
275 ikev2_sa_free_proposal_vector (&c->r_proposals);
276 ikev2_sa_free_proposal_vector (&c->i_proposals);
286 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
289 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
295 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
297 ikev2_sa_free_child_sa (child);
298 vec_del1 (sa->childs, child - sa->childs);
302 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
304 vec_free (sa->i_nonce);
305 vec_free (sa->r_nonce);
307 vec_free (sa->dh_shared_key);
308 vec_free (sa->dh_private_key);
309 vec_free (sa->i_dh_data);
310 vec_free (sa->r_dh_data);
312 ikev2_sa_free_proposal_vector (&sa->r_proposals);
313 ikev2_sa_free_proposal_vector (&sa->i_proposals);
316 vec_free (sa->sk_ai);
317 vec_free (sa->sk_ar);
318 vec_free (sa->sk_ei);
319 vec_free (sa->sk_er);
320 vec_free (sa->sk_pi);
321 vec_free (sa->sk_pr);
323 vec_free (sa->i_id.data);
324 vec_free (sa->r_id.data);
326 vec_free (sa->i_auth.data);
328 EVP_PKEY_free (sa->i_auth.key);
329 vec_free (sa->r_auth.data);
331 EVP_PKEY_free (sa->r_auth.key);
335 vec_free (sa->rekey);
337 vec_free (sa->last_sa_init_req_packet_data);
338 vec_free (sa->last_sa_init_res_packet_data);
340 vec_free (sa->last_res_packet_data);
342 ikev2_sa_free_all_child_sa (&sa->childs);
346 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
350 ikev2_sa_free_all_vec (sa);
352 p = hash_get (ptd->sa_by_rspi, sa->rspi);
355 hash_unset (ptd->sa_by_rspi, sa->rspi);
356 pool_put (ptd->sas, sa);
361 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
363 ikev2_sa_transform_t *t = 0, *t2;
364 ikev2_main_t *km = &ikev2_main;
366 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
371 /* check if received DH group is on our list of supported groups */
372 vec_foreach (t2, km->supported_transforms)
374 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
383 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
387 if (sa->is_initiator)
390 RAND_bytes ((u8 *) & sa->ispi, 8);
393 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
394 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
399 RAND_bytes ((u8 *) & sa->rspi, 8);
402 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
403 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
406 /* generate dh keys */
407 ikev2_generate_dh (sa, t);
412 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
414 ikev2_sa_transform_t *t = 0, *t2;
415 ikev2_main_t *km = &ikev2_main;
417 /*move some data to the new SA */
418 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
419 sa->i_nonce = _(sai->i_nonce);
420 sa->i_dh_data = _(sai->i_dh_data);
421 sa->dh_private_key = _(sai->dh_private_key);
422 ip_address_copy (&sa->iaddr, &sai->iaddr);
423 ip_address_copy (&sa->raddr, &sai->raddr);
424 sa->is_initiator = sai->is_initiator;
425 sa->i_id.type = sai->i_id.type;
426 sa->r_id.type = sai->r_id.type;
427 sa->profile_index = sai->profile_index;
428 sa->tun_itf = sai->tun_itf;
429 sa->is_tun_itf_set = sai->is_tun_itf_set;
430 sa->i_id.data = _(sai->i_id.data);
431 sa->r_id.data = _(sai->r_id.data);
432 sa->i_auth.method = sai->i_auth.method;
433 sa->i_auth.hex = sai->i_auth.hex;
434 sa->i_auth.data = _(sai->i_auth.data);
435 sa->i_auth.key = _(sai->i_auth.key);
436 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
437 sa->childs = _(sai->childs);
438 sa->udp_encap = sai->udp_encap;
439 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
440 sa->dst_port = sai->dst_port;
441 sa->sw_if_index = sai->sw_if_index;
445 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
450 /* check if received DH group is on our list of supported groups */
451 vec_foreach (t2, km->supported_transforms)
453 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
462 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
467 /* generate dh keys */
468 ikev2_complete_dh (sa, t);
473 ikev2_calc_keys (ikev2_sa_t * sa)
476 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
479 u16 integ_key_len = 0, salt_len = 0;
480 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
482 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
484 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
486 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
489 integ_key_len = tr_integ->key_len;
491 salt_len = sizeof (u32);
493 vec_append (s, sa->i_nonce);
494 vec_append (s, sa->r_nonce);
495 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
497 /* Calculate S = Ni | Nr | SPIi | SPIr */
499 vec_add2 (s, tmp, 2 * sizeof (*spi));
501 spi[0] = clib_host_to_net_u64 (sa->ispi);
502 spi[1] = clib_host_to_net_u64 (sa->rspi);
504 /* calculate PRFplus */
506 int len = tr_prf->key_trunc + /* SK_d */
507 integ_key_len * 2 + /* SK_ai, SK_ar */
508 tr_encr->key_len * 2 + /* SK_ei, SK_er */
509 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
512 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
519 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
520 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
521 pos += tr_prf->key_trunc;
526 sa->sk_ai = vec_new (u8, integ_key_len);
527 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
528 pos += integ_key_len;
531 sa->sk_ar = vec_new (u8, integ_key_len);
532 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
533 pos += integ_key_len;
537 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
538 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
539 pos += tr_encr->key_len + salt_len;
542 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
543 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
544 pos += tr_encr->key_len + salt_len;
547 sa->sk_pi = vec_new (u8, tr_prf->key_len);
548 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
549 pos += tr_prf->key_len;
552 sa->sk_pr = vec_new (u8, tr_prf->key_len);
553 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
554 pos += tr_prf->key_len;
557 sa->keys_generated = 1;
561 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
564 u16 integ_key_len = 0;
567 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
569 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
571 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
573 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
576 integ_key_len = ctr_integ->key_len;
578 salt_len = sizeof (u32);
580 vec_append (s, sa->i_nonce);
581 vec_append (s, sa->r_nonce);
582 /* calculate PRFplus */
584 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
586 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
591 child->sk_ei = vec_new (u8, ctr_encr->key_len);
592 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
593 pos += ctr_encr->key_len;
598 child->sk_ai = vec_new (u8, ctr_integ->key_len);
599 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
600 pos += ctr_integ->key_len;
604 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
609 child->sk_er = vec_new (u8, ctr_encr->key_len);
610 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
611 pos += ctr_encr->key_len;
616 child->sk_ar = vec_new (u8, integ_key_len);
617 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
618 pos += integ_key_len;
622 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
631 static_always_inline u8 *
632 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
634 const u32 max_buf_size =
635 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
636 u8 buf[max_buf_size];
637 u8 *res = vec_new (u8, 20);
639 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
640 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
641 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
642 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
643 SHA1 (buf, sizeof (buf), res);
648 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
651 const ike_ke_payload_header_t *ke = p;
652 u16 plen = clib_net_to_host_u16 (ke->length);
653 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
654 if (sizeof (*ke) > rlen)
657 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
658 vec_reset_length (ke_data[0]);
659 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
664 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
666 const ike_payload_header_t *ikep = p;
667 u16 plen = clib_net_to_host_u16 (ikep->length);
668 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
669 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
674 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
677 if (sizeof (*ikep) > rlen)
679 *plen = clib_net_to_host_u16 (ikep->length);
680 if (*plen < sizeof (*ikep) || *plen > rlen)
686 ikev2_process_sa_init_req (vlib_main_t * vm,
687 ikev2_sa_t * sa, ike_header_t * ike,
688 udp_header_t * udp, u32 len)
690 u8 nonce[IKEV2_NONCE_SIZE];
692 u8 payload = ike->nextpayload;
693 ike_payload_header_t *ikep;
696 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
697 "from ", clib_net_to_host_u64 (ike->ispi),
698 clib_net_to_host_u64 (ike->rspi),
699 ip_addr_v4 (&sa->iaddr).as_u32,
700 ip_addr_version (&sa->iaddr) == AF_IP4);
702 sa->ispi = clib_net_to_host_u64 (ike->ispi);
704 /* store whole IKE payload - needed for PSK auth */
705 vec_reset_length (sa->last_sa_init_req_packet_data);
706 vec_add (sa->last_sa_init_req_packet_data, ike, len);
708 if (len < sizeof (*ike))
711 len -= sizeof (*ike);
712 while (p < len && payload != IKEV2_PAYLOAD_NONE)
714 ikep = (ike_payload_header_t *) & ike->payload[p];
715 int current_length = len - p;
716 if (!ikev2_check_payload_length (ikep, current_length, &plen))
719 if (payload == IKEV2_PAYLOAD_SA)
721 ikev2_sa_free_proposal_vector (&sa->i_proposals);
722 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
724 else if (payload == IKEV2_PAYLOAD_KE)
726 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
730 else if (payload == IKEV2_PAYLOAD_NONCE)
732 vec_reset_length (sa->i_nonce);
733 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
734 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
736 else if (payload == IKEV2_PAYLOAD_NOTIFY)
739 ikev2_parse_notify_payload (ikep, current_length);
740 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
742 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
744 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
747 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
748 " behind NAT", sa->ispi);
752 else if (n->msg_type ==
753 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
755 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
757 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
760 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
761 " (self) behind NAT", sa->ispi);
767 else if (payload == IKEV2_PAYLOAD_VENDOR)
769 ikev2_parse_vendor_payload (ikep);
773 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
775 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
777 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
778 sa->unsupported_cp = payload;
783 payload = ikep->nextpayload;
787 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
792 ikev2_process_sa_init_resp (vlib_main_t * vm,
793 ikev2_sa_t * sa, ike_header_t * ike,
794 udp_header_t * udp, u32 len)
796 u8 nonce[IKEV2_NONCE_SIZE];
798 u8 payload = ike->nextpayload;
799 ike_payload_header_t *ikep;
802 sa->ispi = clib_net_to_host_u64 (ike->ispi);
803 sa->rspi = clib_net_to_host_u64 (ike->rspi);
805 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
806 "from ", sa->ispi, sa->rspi,
807 ip_addr_v4 (&sa->raddr).as_u32,
808 ip_addr_version (&sa->raddr) == AF_IP4);
810 /* store whole IKE payload - needed for PSK auth */
811 vec_reset_length (sa->last_sa_init_res_packet_data);
812 vec_add (sa->last_sa_init_res_packet_data, ike, len);
814 if (sizeof (*ike) > len)
817 len -= sizeof (*ike);
818 while (p < len && payload != IKEV2_PAYLOAD_NONE)
820 int current_length = len - p;
821 ikep = (ike_payload_header_t *) & ike->payload[p];
822 if (!ikev2_check_payload_length (ikep, current_length, &plen))
825 if (payload == IKEV2_PAYLOAD_SA)
827 ikev2_sa_free_proposal_vector (&sa->r_proposals);
828 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
831 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
833 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
836 else if (payload == IKEV2_PAYLOAD_KE)
838 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
842 else if (payload == IKEV2_PAYLOAD_NONCE)
844 vec_reset_length (sa->r_nonce);
845 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
846 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
848 else if (payload == IKEV2_PAYLOAD_NOTIFY)
851 ikev2_parse_notify_payload (ikep, current_length);
852 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
854 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
857 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
859 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
860 " behind NAT, unsupported", sa->ispi);
864 else if (n->msg_type ==
865 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
867 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
870 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
873 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
874 " (self) behind NAT", sa->ispi);
880 else if (payload == IKEV2_PAYLOAD_VENDOR)
882 ikev2_parse_vendor_payload (ikep);
886 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
888 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
890 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
891 sa->unsupported_cp = payload;
896 payload = ikep->nextpayload;
902 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
903 u8 * payload, u32 rlen, u32 * out_len)
905 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
907 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
908 ike_payload_header_t *ikep = 0;
911 ikev2_sa_transform_t *tr_integ;
912 ikev2_sa_transform_t *tr_encr;
914 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
916 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
917 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
919 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
922 if (rlen <= sizeof (*ike))
925 int len = rlen - sizeof (*ike);
927 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
929 ikep = (ike_payload_header_t *) & ike->payload[p];
930 int current_length = len - p;
931 if (!ikev2_check_payload_length (ikep, current_length, &plen))
934 if (*payload == IKEV2_PAYLOAD_SK)
936 last_payload = *payload;
940 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
942 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
944 sa->unsupported_cp = *payload;
949 *payload = ikep->nextpayload;
953 if (last_payload != IKEV2_PAYLOAD_SK)
955 ikev2_elog_error ("Last payload must be SK");
961 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
964 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
965 u8 *aad = (u8 *) ike;
966 u32 aad_len = ikep->payload - aad;
967 u8 *tag = ikep->payload + plen;
969 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
970 plen, aad, aad_len, tag, &dlen);
974 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
979 if (rlen < tr_integ->key_trunc)
983 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
984 (u8 *) ike, rlen - tr_integ->key_trunc);
986 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
989 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
991 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
993 ikev2_elog_error ("message integrity check failed");
999 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1004 plaintext = ikep->payload + tr_encr->block_size;
1011 static_always_inline int
1012 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1014 if (i1->type != i2->type)
1017 if (vec_len (i1->data) != vec_len (i2->data))
1020 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1027 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1030 ikev2_main_t *km = &ikev2_main;
1033 ikev2_child_sa_t *c;
1035 /* find old IKE SAs with the same authenticated identity */
1037 pool_foreach (tmp, ptd->sas, ({
1038 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1039 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1042 if (sa->rspi != tmp->rspi)
1043 vec_add1(delete, tmp - ptd->sas);
1047 for (i = 0; i < vec_len (delete); i++)
1049 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1050 vec_foreach (c, tmp->childs)
1052 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1054 ikev2_delete_sa (ptd, tmp);
1058 sa->initial_contact = 0;
1062 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1065 ikev2_main_t *km = &ikev2_main;
1067 if (!sa->initial_contact)
1072 ikev2_initial_contact_cleanup_internal (ptd, sa);
1076 vec_foreach (ptd, km->per_thread_data)
1077 ikev2_initial_contact_cleanup_internal (ptd, sa);
1079 sa->initial_contact = 0;
1083 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1085 const ike_id_payload_header_t *id = p;
1086 u16 plen = clib_net_to_host_u16 (id->length);
1087 if (plen < sizeof (*id) || plen > rlen)
1090 sa_id->type = id->id_type;
1091 vec_reset_length (sa_id->data);
1092 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1098 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1100 const ike_auth_payload_header_t *ah = p;
1101 u16 plen = clib_net_to_host_u16 (ah->length);
1103 a->method = ah->auth_method;
1104 vec_reset_length (a->data);
1105 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1110 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1111 ike_header_t * ike, u32 len)
1114 ikev2_child_sa_t *first_child_sa;
1115 u8 payload = ike->nextpayload;
1117 ike_payload_header_t *ikep;
1121 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1122 "from ", clib_host_to_net_u64 (ike->ispi),
1123 clib_host_to_net_u64 (ike->rspi),
1125 ip_addr_v4 (&sa->raddr).as_u32 :
1126 ip_addr_v4 (&sa->iaddr).as_u32,
1127 ip_addr_version (&sa->raddr) == AF_IP4);
1129 ikev2_calc_keys (sa);
1131 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1135 if (sa->unsupported_cp)
1137 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1143 /* select or create 1st child SA */
1144 if (sa->is_initiator)
1146 first_child_sa = &sa->childs[0];
1150 ikev2_sa_free_all_child_sa (&sa->childs);
1151 vec_add2 (sa->childs, first_child_sa, 1);
1155 /* process encrypted payload */
1156 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1158 ikep = (ike_payload_header_t *) & plaintext[p];
1159 int current_length = dlen - p;
1160 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1163 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1165 if (sa->is_initiator)
1167 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1168 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1173 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1174 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1178 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1180 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1183 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1185 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1188 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1190 if (sa->is_initiator)
1192 if (!ikev2_parse_auth_payload (ikep, current_length,
1198 if (!ikev2_parse_auth_payload (ikep, current_length,
1203 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1206 ikev2_parse_notify_payload (ikep, current_length);
1207 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1209 sa->initial_contact = 1;
1213 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1215 ikev2_parse_vendor_payload (ikep);
1217 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1219 vec_free (first_child_sa->tsi);
1220 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1222 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1224 vec_free (first_child_sa->tsr);
1225 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1229 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1232 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1234 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1235 sa->unsupported_cp = payload;
1240 payload = ikep->nextpayload;
1247 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1252 ikev2_process_informational_req (vlib_main_t * vm,
1253 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1256 u8 payload = ike->nextpayload;
1258 ike_payload_header_t *ikep;
1260 ikev2_notify_t *n = 0;
1262 sa->liveness_retries = 0;
1263 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1264 "from ", clib_host_to_net_u64 (ike->ispi),
1265 clib_host_to_net_u64 (ike->rspi),
1266 ip_addr_v4 (&sa->iaddr).as_u32,
1267 ip_addr_version (&sa->iaddr) == AF_IP4);
1269 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1274 /* process encrypted payload */
1276 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1278 u32 current_length = dlen - p;
1279 if (p + sizeof (*ikep) > dlen)
1282 ikep = (ike_payload_header_t *) & plaintext[p];
1283 u16 plen = clib_net_to_host_u16 (ikep->length);
1285 if (plen < sizeof (*ikep) || plen > current_length)
1288 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1290 n = ikev2_parse_notify_payload (ikep, current_length);
1293 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1294 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1297 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1299 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1301 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1303 ikev2_parse_vendor_payload (ikep);
1307 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1309 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1311 sa->unsupported_cp = payload;
1315 payload = ikep->nextpayload;
1322 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1323 ikev2_sa_t * sa, ike_header_t * ike,
1327 u8 payload = ike->nextpayload;
1330 u8 nonce[IKEV2_NONCE_SIZE];
1332 ike_payload_header_t *ikep;
1333 ikev2_notify_t *n = 0;
1334 ikev2_ts_t *tsi = 0;
1335 ikev2_ts_t *tsr = 0;
1336 ikev2_sa_proposal_t *proposal = 0;
1337 ikev2_child_sa_t *child_sa;
1341 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1342 "from ", clib_host_to_net_u64 (ike->ispi),
1343 clib_host_to_net_u64 (ike->rspi),
1344 ip_addr_v4 (&sa->raddr).as_u32,
1345 ip_addr_version (&sa->raddr) == AF_IP4);
1347 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1350 goto cleanup_and_exit;
1352 /* process encrypted payload */
1354 while (payload != IKEV2_PAYLOAD_NONE)
1356 ikep = (ike_payload_header_t *) & plaintext[p];
1357 int current_length = dlen - p;
1358 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1359 goto cleanup_and_exit;
1361 if (payload == IKEV2_PAYLOAD_SA)
1363 proposal = ikev2_parse_sa_payload (ikep, current_length);
1365 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1367 n = ikev2_parse_notify_payload (ikep, current_length);
1368 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1373 else if (payload == IKEV2_PAYLOAD_DELETE)
1375 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1377 else if (payload == IKEV2_PAYLOAD_VENDOR)
1379 ikev2_parse_vendor_payload (ikep);
1381 else if (payload == IKEV2_PAYLOAD_NONCE)
1383 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1385 else if (payload == IKEV2_PAYLOAD_TSI)
1387 tsi = ikev2_parse_ts_payload (ikep, current_length);
1389 else if (payload == IKEV2_PAYLOAD_TSR)
1391 tsr = ikev2_parse_ts_payload (ikep, current_length);
1395 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1397 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1399 sa->unsupported_cp = payload;
1400 goto cleanup_and_exit;
1403 payload = ikep->nextpayload;
1407 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1409 ikev2_rekey_t *rekey = &sa->rekey[0];
1410 rekey->protocol_id = proposal->protocol_id;
1412 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1413 rekey->i_proposal->spi = rekey->spi;
1414 rekey->r_proposal = proposal;
1418 vec_reset_length (sa->r_nonce);
1419 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1420 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1423 child_sa->rekey_retries = 0;
1428 ikev2_rekey_t *rekey;
1429 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1432 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1434 goto cleanup_and_exit;
1436 vec_add2 (sa->rekey, rekey, 1);
1437 rekey->protocol_id = n->protocol_id;
1438 rekey->spi = n->spi;
1439 rekey->i_proposal = proposal;
1441 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1445 vec_free (sa->i_nonce);
1446 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1447 /* generate new Nr */
1448 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1449 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1460 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1468 ikev2_sa_transform_t *tr_prf;
1471 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1477 nonce = sa->i_nonce;
1478 packet_data = sa->last_sa_init_res_packet_data;
1484 nonce = sa->r_nonce;
1485 packet_data = sa->last_sa_init_req_packet_data;
1488 data = vec_new (u8, 4);
1490 vec_append (data, id->data);
1492 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1493 vec_append (authmsg, packet_data);
1494 vec_append (authmsg, nonce);
1495 vec_append (authmsg, id_hash);
1503 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1505 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1506 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1507 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1508 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1515 ikev2_sa_match_ts (ikev2_sa_t * sa)
1517 ikev2_main_t *km = &ikev2_main;
1519 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1520 ikev2_id_t *id_rem, *id_loc;
1523 pool_foreach (p, km->profiles, ({
1525 if (sa->is_initiator)
1541 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1542 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1545 sa->profile_index = p - km->profiles;
1547 vec_foreach(ts, sa->childs[0].tsi)
1549 if (ikev2_ts_cmp(p_tsi, ts))
1551 vec_add1 (tsi, ts[0]);
1556 vec_foreach(ts, sa->childs[0].tsr)
1558 if (ikev2_ts_cmp(p_tsr, ts))
1560 vec_add1 (tsr, ts[0]);
1571 vec_free (sa->childs[0].tsi);
1572 vec_free (sa->childs[0].tsr);
1573 sa->childs[0].tsi = tsi;
1574 sa->childs[0].tsr = tsr;
1580 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1585 ikev2_sa_auth (ikev2_sa_t * sa)
1587 ikev2_main_t *km = &ikev2_main;
1588 ikev2_profile_t *p, *sel_p = 0;
1589 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1590 ikev2_sa_transform_t *tr_prf;
1593 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1595 /* only shared key and rsa signature */
1596 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1597 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1599 ikev2_elog_uint (IKEV2_LOG_ERROR,
1600 "unsupported authentication method %u",
1602 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1606 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1607 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1609 ikev2_id_t *id_rem, *id_loc;
1610 ikev2_auth_t *sa_auth;
1612 if (sa->is_initiator)
1616 sa_auth = &sa->r_auth;
1622 sa_auth = &sa->i_auth;
1626 pool_foreach (p, km->profiles, ({
1629 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1630 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1633 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1635 if (!p->auth.data ||
1636 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1639 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1640 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1642 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1644 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1651 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1653 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1656 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1658 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1671 sa->udp_encap = sel_p->udp_encap;
1672 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1676 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1678 if (!sa->is_initiator)
1680 vec_free (sa->r_id.data);
1681 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1682 sa->r_id.type = sel_p->loc_id.type;
1683 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1684 sa->i_id.type = sel_p->rem_id.type;
1686 /* generate our auth data */
1687 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1688 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1690 vec_free (sa->r_auth.data);
1691 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1692 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1694 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1696 vec_free (sa->r_auth.data);
1697 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1698 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1702 /* select transforms for 1st child sa */
1703 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1704 sa->childs[0].r_proposals =
1705 ikev2_select_proposal (sa->childs[0].i_proposals,
1706 IKEV2_PROTOCOL_ESP);
1708 if (~0 != sel_p->tun_itf)
1710 sa->is_tun_itf_set = 1;
1711 sa->tun_itf = sel_p->tun_itf;
1717 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1718 "profile found! ispi %lx", sa->ispi);
1719 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1727 ikev2_sa_auth_init (ikev2_sa_t * sa)
1729 ikev2_main_t *km = &ikev2_main;
1730 u8 *authmsg, *key_pad, *psk = 0;
1731 ikev2_sa_transform_t *tr_prf;
1734 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1736 /* only shared key and rsa signature */
1737 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1738 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1740 ikev2_elog_uint (IKEV2_LOG_ERROR,
1741 "unsupported authentication method %u",
1743 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1747 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1748 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1749 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1751 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1753 vec_free (sa->i_auth.data);
1754 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1755 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1757 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1759 vec_free (sa->i_auth.data);
1760 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1761 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1770 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1772 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1776 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1778 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1788 ipsec_sa_flags_t flags;
1791 ipsec_crypto_alg_t encr_type;
1792 ipsec_integ_alg_t integ_type;
1793 ip46_address_t local_ip;
1794 ip46_address_t remote_ip;
1795 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1797 u32 old_remote_sa_id;
1798 u16 ipsec_over_udp_port;
1801 } ikev2_add_ipsec_tunnel_args_t;
1804 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1806 ikev2_main_t *km = &ikev2_main;
1809 ip46_address_t zero_addr = ip46_address_initializer;
1811 if (~0 == a->sw_if_index)
1813 /* no tunnel associated with the SA/profile - create a new one */
1814 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1815 &a->local_ip, &a->remote_ip, 0,
1816 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1817 TUNNEL_MODE_P2P, &sw_if_index);
1819 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1821 if (hash_get (km->sw_if_indices, sw_if_index))
1822 /* interface is managed by IKE; proceed with updating SAs */
1825 hash_set1 (km->sw_if_indices, sw_if_index);
1829 sw_if_index = a->sw_if_index;
1830 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1835 ikev2_elog_uint (IKEV2_LOG_ERROR,
1836 "installing ipip tunnel failed! local spi: %x",
1842 vec_add1 (sas_in, a->remote_sa_id);
1845 ipsec_tun_protect_del (sw_if_index, NULL);
1847 /* replace local SA immediately */
1848 ipsec_sa_unlock_id (a->local_sa_id);
1850 /* keep the old sa */
1851 vec_add1 (sas_in, a->old_remote_sa_id);
1854 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1856 IPSEC_PROTOCOL_ESP, a->encr_type,
1857 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1858 a->flags, 0, a->salt_local, &zero_addr,
1859 &zero_addr, NULL, a->src_port, a->dst_port);
1860 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1861 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1862 a->integ_type, &a->rem_ikey,
1863 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1864 a->salt_remote, &zero_addr,
1865 &zero_addr, NULL, a->ipsec_over_udp_port,
1866 a->ipsec_over_udp_port);
1868 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1872 ikev2_create_tunnel_interface (vlib_main_t * vm,
1874 ikev2_child_sa_t * child, u32 sa_index,
1875 u32 child_index, u8 is_rekey)
1877 u32 thread_index = vlib_get_thread_index ();
1878 ikev2_main_t *km = &ikev2_main;
1879 ipsec_crypto_alg_t encr_type;
1880 ipsec_integ_alg_t integ_type;
1881 ikev2_profile_t *p = 0;
1882 ikev2_sa_transform_t *tr;
1883 ikev2_sa_proposal_t *proposals;
1885 ikev2_add_ipsec_tunnel_args_t a;
1887 clib_memset (&a, 0, sizeof (a));
1889 if (!child->r_proposals)
1891 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1895 if (sa->is_initiator)
1897 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1898 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1899 proposals = child->r_proposals;
1900 a.local_spi = child->r_proposals[0].spi;
1901 a.remote_spi = child->i_proposals[0].spi;
1905 ip_address_to_46 (&sa->raddr, &a.local_ip);
1906 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1907 proposals = child->i_proposals;
1908 a.local_spi = child->i_proposals[0].spi;
1909 a.remote_spi = child->r_proposals[0].spi;
1912 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1915 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1916 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1919 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1920 a.is_rekey = is_rekey;
1922 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1923 if (tr && tr->esn_type)
1924 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1926 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1929 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1931 switch (tr->key_len)
1934 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1937 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1940 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1943 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1948 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1951 switch (tr->key_len)
1954 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1957 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1960 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1963 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1971 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1977 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1980 a.encr_type = encr_type;
1984 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1987 switch (tr->integ_type)
1989 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1990 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1992 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1993 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1995 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1996 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1998 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1999 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2002 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2008 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2014 integ_type = IPSEC_INTEG_ALG_NONE;
2017 a.integ_type = integ_type;
2018 ikev2_calc_child_keys (sa, child);
2020 if (sa->is_initiator)
2022 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2023 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2024 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2025 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2028 a.salt_remote = child->salt_er;
2029 a.salt_local = child->salt_ei;
2031 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2035 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2036 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2037 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2038 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2041 a.salt_remote = child->salt_ei;
2042 a.salt_local = child->salt_er;
2044 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
2045 a.src_port = sa->ipsec_over_udp_port;
2048 if (sa->is_initiator && sa->profile_index != ~0)
2049 p = pool_elt_at_index (km->profiles, sa->profile_index);
2051 if (p && p->lifetime)
2053 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2054 if (p->lifetime_jitter)
2056 // This is not much better than rand(3), which Coverity warns
2057 // is unsuitable for security applications; random_u32 is
2058 // however fast. If this perturbance to the expiration time
2059 // needs to use a better RNG then we may need to use something
2060 // like /dev/urandom which has significant overhead.
2061 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2062 rnd = random_u32 (&rnd);
2064 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2068 if (thread_index & 0xffffffc0)
2069 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2071 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2072 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2074 child->local_sa_id =
2076 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2078 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2083 /* create a new remote SA ID to keep the old SA for a bit longer
2084 * so the peer has some time to swap their SAs */
2086 /* use most significat bit of child index part in id */
2088 if (sa->current_remote_id_mask)
2090 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2091 sa->current_remote_id_mask = 0;
2095 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2096 sa->current_remote_id_mask = mask;
2097 remote_sa_id |= mask;
2099 sa->old_id_expiration = 3.0;
2100 sa->old_remote_id_present = 1;
2103 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2105 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2106 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2108 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2109 (u8 *) & a, sizeof (a));
2115 ip46_address_t local_ip;
2116 ip46_address_t remote_ip;
2120 } ikev2_del_ipsec_tunnel_args_t;
2122 static_always_inline u32
2123 ikev2_flip_alternate_sa_bit (u32 id)
2132 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2134 ikev2_main_t *km = &ikev2_main;
2135 ipip_tunnel_t *ipip = NULL;
2138 if (~0 == a->sw_if_index)
2141 ipip_tunnel_key_t key = {
2143 .dst = a->remote_ip,
2144 .transport = IPIP_TRANSPORT_IP4,
2149 ipip = ipip_tunnel_db_find (&key);
2153 sw_if_index = ipip->sw_if_index;
2154 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2161 sw_if_index = a->sw_if_index;
2162 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2165 if (~0 != sw_if_index)
2166 ipsec_tun_protect_del (sw_if_index, NULL);
2168 ipsec_sa_unlock_id (a->remote_sa_id);
2169 ipsec_sa_unlock_id (a->local_sa_id);
2170 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2173 ipip_del_tunnel (ipip->sw_if_index);
2177 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2178 ikev2_child_sa_t * child)
2180 ikev2_del_ipsec_tunnel_args_t a;
2182 clib_memset (&a, 0, sizeof (a));
2184 if (sa->is_initiator)
2186 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2187 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2191 ip_address_to_46 (&sa->raddr, &a.local_ip);
2192 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2195 a.remote_sa_id = child->remote_sa_id;
2196 a.local_sa_id = child->local_sa_id;
2197 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2199 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2205 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2206 ike_header_t * ike, void *user, udp_header_t * udp)
2208 ikev2_main_t *km = &ikev2_main;
2209 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2211 ike_payload_header_t *ph;
2215 ikev2_sa_transform_t *tr_encr, *tr_integ;
2217 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2219 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2221 ikev2_payload_chain_t *chain = 0;
2222 ikev2_payload_new_chain (chain);
2224 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2226 if (sa->r_proposals == 0)
2228 ikev2_payload_add_notify (chain,
2229 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2230 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2232 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2234 u8 *data = vec_new (u8, 2);
2235 ikev2_sa_transform_t *tr_dh;
2237 ikev2_sa_get_td_for_type (sa->r_proposals,
2238 IKEV2_TRANSFORM_TYPE_DH);
2239 ASSERT (tr_dh && tr_dh->dh_type);
2241 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2242 data[1] = (tr_dh->dh_type) & 0xff;
2244 ikev2_payload_add_notify (chain,
2245 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2248 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2250 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2252 u8 *data = vec_new (u8, 1);
2254 data[0] = sa->unsupported_cp;
2255 ikev2_payload_add_notify (chain,
2256 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2264 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2265 ikev2_payload_add_sa (chain, sa->r_proposals);
2266 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2267 ikev2_payload_add_nonce (chain, sa->r_nonce);
2269 u8 *nat_detection_sha1 =
2270 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2271 clib_host_to_net_u64 (sa->rspi),
2272 &sa->raddr, udp->dst_port);
2273 ikev2_payload_add_notify (chain,
2274 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2275 nat_detection_sha1);
2276 vec_free (nat_detection_sha1);
2277 nat_detection_sha1 =
2278 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2279 clib_host_to_net_u64 (sa->rspi),
2280 &sa->iaddr, udp->src_port);
2281 ikev2_payload_add_notify (chain,
2282 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2283 nat_detection_sha1);
2284 vec_free (nat_detection_sha1);
2287 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2289 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2291 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2292 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2293 ikev2_payload_add_auth (chain, &sa->r_auth);
2294 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2295 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2296 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2298 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2300 ikev2_payload_add_notify (chain,
2301 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2303 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2305 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2307 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2309 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2310 ikev2_payload_add_auth (chain, &sa->r_auth);
2312 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2314 ikev2_payload_add_notify (chain,
2315 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2316 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2317 ikev2_payload_add_auth (chain, &sa->r_auth);
2318 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2319 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2321 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2323 u8 *data = vec_new (u8, 1);
2325 data[0] = sa->unsupported_cp;
2326 ikev2_payload_add_notify (chain,
2327 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2331 else if (sa->state == IKEV2_STATE_SA_INIT)
2333 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2334 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2335 ikev2_payload_add_auth (chain, &sa->i_auth);
2336 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2337 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2338 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2339 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2344 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2348 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2350 /* if pending delete */
2353 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2355 if (sa->is_initiator)
2356 ikev2_payload_add_delete (chain, sa->del);
2358 /* The response to a request that deletes the IKE SA is an empty
2359 INFORMATIONAL response. */
2360 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2362 /* The response to a request that deletes ESP or AH SAs will contain
2363 delete payloads for the paired SAs going in the other direction. */
2366 ikev2_payload_add_delete (chain, sa->del);
2371 /* received N(AUTHENTICATION_FAILED) */
2372 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2374 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2377 /* received unsupported critical payload */
2378 else if (sa->unsupported_cp)
2380 u8 *data = vec_new (u8, 1);
2382 data[0] = sa->unsupported_cp;
2383 ikev2_payload_add_notify (chain,
2384 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2387 sa->unsupported_cp = 0;
2389 /* else send empty response */
2391 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2393 if (sa->is_initiator)
2396 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2397 ikev2_notify_t notify;
2398 u8 *data = vec_new (u8, 4);
2399 clib_memset (¬ify, 0, sizeof (notify));
2400 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2401 notify.spi = sa->childs[0].i_proposals->spi;
2402 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2404 ikev2_payload_add_sa (chain, proposals);
2405 ikev2_payload_add_nonce (chain, sa->i_nonce);
2406 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2407 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2408 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2415 if (vec_len (sa->rekey) > 0)
2417 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2418 ikev2_payload_add_nonce (chain, sa->r_nonce);
2419 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2421 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2423 vec_del1 (sa->rekey, 0);
2425 else if (sa->unsupported_cp)
2427 u8 *data = vec_new (u8, 1);
2429 data[0] = sa->unsupported_cp;
2430 ikev2_payload_add_notify (chain,
2431 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2434 sa->unsupported_cp = 0;
2438 ikev2_payload_add_notify (chain,
2439 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2446 ike->version = IKE_VERSION_2;
2447 ike->nextpayload = IKEV2_PAYLOAD_SK;
2448 tlen = sizeof (*ike);
2449 if (sa->is_initiator)
2451 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2452 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2456 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2460 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2462 tlen += vec_len (chain->data);
2463 ike->nextpayload = chain->first_payload_type;
2464 ike->length = clib_host_to_net_u32 (tlen);
2466 if (tlen + b->current_length + b->current_data > buffer_data_size)
2472 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2474 /* store whole IKE payload - needed for PSK auth */
2475 vec_reset_length (sa->last_sa_init_res_packet_data);
2476 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2480 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2481 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2484 plen = sizeof (*ph);
2485 ph = (ike_payload_header_t *) & ike->payload[0];
2486 ph->nextpayload = chain->first_payload_type;
2489 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2490 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2491 plen += vec_len (chain->data) + iv_len;
2493 /* add space for hmac/tag */
2495 plen += tr_integ->key_trunc;
2497 plen += IKEV2_GCM_ICV_SIZE;
2500 if (tlen + b->current_length + b->current_data > buffer_data_size)
2506 /* payload and total length */
2507 ph->length = clib_host_to_net_u16 (plen);
2508 ike->length = clib_host_to_net_u32 (tlen);
2512 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2513 ph->payload, (u8 *) ike,
2514 sizeof (*ike) + sizeof (*ph),
2515 ph->payload + plen - sizeof (*ph) -
2516 IKEV2_GCM_ICV_SIZE))
2524 if (!ikev2_encrypt_data
2525 (ptd, sa, tr_encr, chain->data, ph->payload))
2531 ikev2_calc_integr (tr_integ,
2532 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2533 (u8 *) ike, tlen - tr_integ->key_trunc);
2534 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2535 sizeof (*ike), integ, tr_integ->key_trunc);
2538 /* store whole IKE payload - needed for retransmit */
2539 vec_reset_length (sa->last_res_packet_data);
2540 vec_add (sa->last_res_packet_data, ike, tlen);
2544 ikev2_payload_destroy_chain (chain);
2550 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2551 ip_address_t iaddr, ip_address_t raddr,
2556 u8 payload = ike->nextpayload;
2558 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2559 ip_address_cmp (&sa->iaddr, &iaddr) ||
2560 ip_address_cmp (&sa->raddr, &raddr))
2565 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2567 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2568 u32 plen = clib_net_to_host_u16 (ikep->length);
2570 if (plen < sizeof (ike_payload_header_t))
2573 if (payload == IKEV2_PAYLOAD_NONCE &&
2574 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2576 /* req is retransmit */
2577 if (sa->state == IKEV2_STATE_SA_INIT)
2579 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2580 u32 slen = clib_net_to_host_u32 (tmp->length);
2581 ike->ispi = tmp->ispi;
2582 ike->rspi = tmp->rspi;
2583 ike->nextpayload = tmp->nextpayload;
2584 ike->version = tmp->version;
2585 ike->exchange = tmp->exchange;
2586 ike->flags = tmp->flags;
2587 ike->msgid = tmp->msgid;
2588 ike->length = tmp->length;
2589 clib_memcpy_fast (ike->payload, tmp->payload,
2590 slen - sizeof (*ike));
2591 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2592 "ispi %lx IKE_SA_INIT retransmit "
2593 "from %d.%d.%d.%d to %d.%d.%d.%d",
2595 ip_addr_v4 (&raddr).as_u32,
2596 ip_addr_v4 (&iaddr).as_u32);
2599 /* else ignore req */
2602 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2603 "ispi %lx IKE_SA_INIT ignore "
2604 "from %d.%d.%d.%d to %d.%d.%d.%d",
2606 ip_addr_v4 (&raddr).as_u32,
2607 ip_addr_v4 (&iaddr).as_u32);
2611 payload = ikep->nextpayload;
2619 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2620 ip_address_t raddr, u32 rlen)
2624 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2627 pool_foreach (sa, ptd->sas, ({
2628 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2634 /* req is not retransmit */
2639 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2641 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2644 if (msg_id > sa->last_msg_id)
2646 sa->last_msg_id = msg_id;
2650 /* retransmitted req */
2651 if (msg_id == sa->last_msg_id)
2653 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2654 u32 slen = clib_net_to_host_u32 (tmp->length);
2655 ike->ispi = tmp->ispi;
2656 ike->rspi = tmp->rspi;
2657 ike->nextpayload = tmp->nextpayload;
2658 ike->version = tmp->version;
2659 ike->exchange = tmp->exchange;
2660 ike->flags = tmp->flags;
2661 ike->msgid = tmp->msgid;
2662 ike->length = tmp->length;
2663 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2664 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2665 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2666 ip_addr_v4 (&sa->iaddr).as_u32);
2670 /* old req ignore */
2671 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2672 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2673 ip_addr_v4 (&sa->iaddr).as_u32);
2678 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2680 ikev2_main_t *km = &ikev2_main;
2681 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2682 sa->profile_index = ~0;
2686 ikev2_del_sa_init_from_main (u64 * ispi)
2688 ikev2_main_t *km = &ikev2_main;
2689 uword *p = hash_get (km->sa_by_ispi, *ispi);
2692 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2693 hash_unset (km->sa_by_ispi, sai->ispi);
2694 ikev2_sa_free_all_vec (sai);
2695 pool_put (km->sais, sai);
2700 ikev2_del_sa_init (u64 ispi)
2702 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2706 static_always_inline void
2707 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2709 if (sa->is_initiator)
2711 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2712 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2716 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2717 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2721 static_always_inline void
2722 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2724 if (sa->is_initiator)
2726 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2727 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2731 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2732 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2736 static_always_inline void
2737 ikev2_set_ip_address (ikev2_sa_t * sa, const void *src,
2738 const void *dst, const int af, const int is_initiator)
2740 const void *raddr = is_initiator ? src : dst;
2741 const void *iaddr = is_initiator ? dst : src;
2742 ip_address_set (&sa->raddr, raddr, af);
2743 ip_address_set (&sa->iaddr, iaddr, af);
2747 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2748 ip6_header_t * ip6, u8 is_ip4)
2753 src = ip4->src_address.as_u32;
2754 dst = ip4->dst_address.as_u32;
2758 src = ip6->src_address.as_u32[3];
2759 dst = ip6->dst_address.as_u32[3];
2761 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2762 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2763 exchange, src, dst);
2766 static_always_inline uword
2767 ikev2_node_internal (vlib_main_t * vm,
2768 vlib_node_runtime_t * node, vlib_frame_t * frame,
2771 u32 n_left = frame->n_vectors, *from;
2772 ikev2_main_t *km = &ikev2_main;
2773 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2774 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2775 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2778 from = vlib_frame_vector_args (frame);
2779 vlib_get_buffers (vm, from, bufs, n_left);
2784 vlib_buffer_t *b0 = b[0];
2785 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2786 : IKEV2_NEXT_IP6_ERROR_DROP;
2787 ip4_header_t *ip40 = 0;
2788 ip6_header_t *ip60 = 0;
2791 ikev2_sa_t *sa0 = 0;
2792 ikev2_sa_t sa; /* temporary store for SA */
2795 int is_req = 0, has_non_esp_marker = 0;
2797 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2799 u8 *ptr = vlib_buffer_get_current (b0);
2800 ip40 = (ip4_header_t *) ptr;
2801 ptr += sizeof (*ip40);
2802 udp0 = (udp_header_t *) ptr;
2803 ptr += sizeof (*udp0);
2804 ike0 = (ike_header_t *) ptr;
2805 ip_hdr_sz = sizeof (*ip40);
2809 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2810 ike0 = vlib_buffer_get_current (b0);
2811 vlib_buffer_advance (b0, -sizeof (*udp0));
2812 udp0 = vlib_buffer_get_current (b0);
2816 ip40 = (ip4_header_t *) ipx_hdr;
2817 ip_hdr_sz = sizeof (*ip40);
2821 ip60 = (ip6_header_t *) ipx_hdr;
2822 ip_hdr_sz = sizeof (*ip60);
2824 vlib_buffer_advance (b0, -ip_hdr_sz);
2827 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2829 /* check for non-esp marker */
2830 if (*((u32 *) ike0) == 0)
2833 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2834 rlen -= sizeof (ikev2_non_esp_marker);
2835 has_non_esp_marker = 1;
2838 if (clib_net_to_host_u32 (ike0->length) != rlen)
2840 vlib_node_increment_counter (vm, node->node_index,
2841 IKEV2_ERROR_BAD_LENGTH, 1);
2845 if (ike0->version != IKE_VERSION_2)
2847 vlib_node_increment_counter (vm, node->node_index,
2848 IKEV2_ERROR_NOT_IKEV2, 1);
2852 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2855 clib_memset (sa0, 0, sizeof (*sa0));
2857 u8 is_initiator = ike0->flags & IKEV2_HDR_FLAG_INITIATOR;
2860 if (ike0->rspi == 0)
2863 ikev2_set_ip_address (sa0, &ip40->dst_address,
2864 &ip40->src_address, AF_IP4,
2867 ikev2_set_ip_address (sa0, &ip60->dst_address,
2868 &ip60->src_address, AF_IP6,
2871 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2874 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2878 vlib_node_increment_counter (vm, node->node_index,
2881 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2883 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2888 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2890 vlib_node_increment_counter (vm, node->node_index,
2891 IKEV2_ERROR_MALFORMED_PACKET,
2894 if (sa0->state == IKEV2_STATE_SA_INIT)
2896 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2898 ikev2_select_proposal (sa0->i_proposals,
2899 IKEV2_PROTOCOL_IKE);
2900 ikev2_generate_sa_init_data (sa0);
2903 if (sa0->state == IKEV2_STATE_SA_INIT
2904 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2906 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2908 vlib_node_increment_counter (vm, node->node_index,
2909 IKEV2_ERROR_NO_BUFF_SPACE,
2913 if (sa0->state == IKEV2_STATE_SA_INIT)
2915 /* add SA to the pool */
2916 pool_get (ptd->sas, sa0);
2917 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2918 ikev2_init_sa (vm, sa0);
2919 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2923 ikev2_sa_free_all_vec (sa0);
2927 else //received sa_init without initiator flag
2930 ikev2_set_ip_address (sa0, &ip40->src_address,
2931 &ip40->dst_address, AF_IP4,
2934 ikev2_set_ip_address (sa0, &ip60->src_address,
2935 &ip60->dst_address, AF_IP6,
2938 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2940 if (sa0->state == IKEV2_STATE_SA_INIT)
2943 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2944 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2947 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2949 if (clib_atomic_bool_cmp_and_swap
2950 (&sai->init_response_received, 0, 1))
2952 ikev2_complete_sa_data (sa0, sai);
2953 ikev2_calc_keys (sa0);
2954 ikev2_sa_auth_init (sa0);
2956 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2958 vlib_node_increment_counter (vm,
2960 IKEV2_ERROR_NO_BUFF_SPACE,
2965 /* we've already processed sa-init response */
2966 sa0->state = IKEV2_STATE_UNKNOWN;
2971 if (sa0->state == IKEV2_STATE_SA_INIT)
2973 /* add SA to the pool */
2974 pool_get (ptd->sas, sa0);
2975 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2976 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2980 ikev2_sa_free_all_vec (sa0);
2984 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2987 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2990 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2991 slen = ikev2_retransmit_resp (sa0, ike0);
2994 vlib_node_increment_counter (vm, node->node_index,
2997 IKEV2_ERROR_IKE_REQ_IGNORE
2999 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3004 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3005 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3007 ikev2_sa_auth (sa0);
3009 vlib_node_increment_counter (vm, node->node_index,
3010 IKEV2_ERROR_MALFORMED_PACKET, 1);
3011 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3013 ikev2_initial_contact_cleanup (ptd, sa0);
3014 ikev2_sa_match_ts (sa0);
3015 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3016 ikev2_create_tunnel_interface (vm, sa0,
3021 if (sa0->is_initiator)
3023 ikev2_del_sa_init (sa0->ispi);
3027 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3029 vlib_node_increment_counter (vm, node->node_index,
3030 IKEV2_ERROR_NO_BUFF_SPACE,
3035 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3038 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3041 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3042 slen = ikev2_retransmit_resp (sa0, ike0);
3045 vlib_node_increment_counter (vm, node->node_index,
3048 IKEV2_ERROR_IKE_REQ_IGNORE
3050 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3055 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3058 vlib_node_increment_counter (vm, node->node_index,
3059 IKEV2_ERROR_MALFORMED_PACKET,
3067 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3069 ikev2_delete_t *d, *tmp, *resp = 0;
3070 vec_foreach (d, sa0->del)
3072 ikev2_child_sa_t *ch_sa;
3073 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3075 !sa0->is_initiator);
3078 ikev2_delete_tunnel_interface (km->vnet_main,
3080 if (!sa0->is_initiator)
3082 vec_add2 (resp, tmp, 1);
3083 tmp->protocol_id = d->protocol_id;
3084 tmp->spi = ch_sa->r_proposals[0].spi;
3086 ikev2_sa_del_child_sa (sa0, ch_sa);
3089 if (!sa0->is_initiator)
3091 vec_free (sa0->del);
3096 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
3098 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
3099 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3101 vlib_node_increment_counter (vm, node->node_index,
3102 IKEV2_ERROR_NO_BUFF_SPACE,
3107 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3110 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3113 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3114 slen = ikev2_retransmit_resp (sa0, ike0);
3117 vlib_node_increment_counter (vm, node->node_index,
3120 IKEV2_ERROR_IKE_REQ_IGNORE
3122 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3127 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3130 vlib_node_increment_counter (vm, node->node_index,
3131 IKEV2_ERROR_MALFORMED_PACKET,
3139 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3142 ikev2_sa_free_all_child_sa (&sa0->childs);
3143 ikev2_child_sa_t *child;
3144 vec_add2 (sa0->childs, child, 1);
3145 clib_memset (child, 0, sizeof (*child));
3146 child->r_proposals = sa0->rekey[0].r_proposal;
3147 child->i_proposals = sa0->rekey[0].i_proposal;
3148 child->tsi = sa0->rekey[0].tsi;
3149 child->tsr = sa0->rekey[0].tsr;
3150 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3151 child - sa0->childs, 1);
3153 if (sa0->is_initiator)
3155 vec_free (sa0->rekey);
3159 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3161 vlib_node_increment_counter (vm, node->node_index,
3162 IKEV2_ERROR_NO_BUFF_SPACE,
3170 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3174 /* if we are sending packet back, rewrite headers */
3175 if (slen && ~0 != slen)
3179 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3180 ikev2_rewrite_v4_addrs (sa0, ip40);
3184 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3185 ikev2_rewrite_v6_addrs (sa0, ip60);
3190 udp0->dst_port = udp0->src_port =
3191 clib_net_to_host_u16 (ikev2_get_port (sa0));
3193 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3196 if (!has_non_esp_marker)
3197 slen = ikev2_insert_non_esp_marker (ike0, slen);
3202 if (has_non_esp_marker)
3203 slen += sizeof (ikev2_non_esp_marker);
3205 u16 tp = udp0->dst_port;
3206 udp0->dst_port = udp0->src_port;
3207 udp0->src_port = tp;
3210 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3212 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3215 ip40->length = clib_host_to_net_u16 (b0->current_length);
3216 ip40->checksum = ip4_header_checksum (ip40);
3220 ip60->payload_length =
3221 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3225 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3226 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3228 ikev2_child_sa_t *c;
3230 vec_foreach (c, sa0->childs)
3231 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3233 ikev2_delete_sa (ptd, sa0);
3235 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3236 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3239 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3240 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3241 t->next_index = next[0];
3248 vlib_node_increment_counter (vm, node->node_index,
3249 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3250 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3251 return frame->n_vectors;
3255 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3257 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3261 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3263 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3267 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3268 .function = ikev2_ip4,
3269 .name = "ikev2-ip4",
3270 .vector_size = sizeof (u32),
3271 .format_trace = format_ikev2_trace,
3272 .type = VLIB_NODE_TYPE_INTERNAL,
3274 .n_errors = ARRAY_LEN(ikev2_error_strings),
3275 .error_strings = ikev2_error_strings,
3277 .n_next_nodes = IKEV2_IP4_N_NEXT,
3279 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3280 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3284 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3285 .function = ikev2_ip6,
3286 .name = "ikev2-ip6",
3287 .vector_size = sizeof (u32),
3288 .format_trace = format_ikev2_trace,
3289 .type = VLIB_NODE_TYPE_INTERNAL,
3291 .n_errors = ARRAY_LEN(ikev2_error_strings),
3292 .error_strings = ikev2_error_strings,
3294 .n_next_nodes = IKEV2_IP6_N_NEXT,
3296 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3297 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3302 // set ikev2 proposals when vpp is used as initiator
3303 static clib_error_t *
3304 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3305 ikev2_transforms_set * ts,
3306 ikev2_sa_proposal_t ** proposals, int is_ike)
3309 ikev2_main_t *km = &ikev2_main;
3310 ikev2_sa_proposal_t *proposal;
3311 vec_add2 (*proposals, proposal, 1);
3312 ikev2_sa_transform_t *td;
3317 vec_foreach (td, km->supported_transforms)
3319 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3320 && td->encr_type == ts->crypto_alg
3321 && td->key_len == ts->crypto_key_size / 8)
3324 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3325 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3326 vec_add (td->attrs, (u8 *) attr, 4);
3327 vec_add1 (proposal->transforms, *td);
3336 r = clib_error_return (0, "Unsupported algorithm");
3340 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3344 vec_foreach (td, km->supported_transforms)
3346 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3347 && td->integ_type == ts->integ_alg)
3349 vec_add1 (proposal->transforms, *td);
3357 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3358 r = clib_error_return (0, "Unsupported algorithm");
3367 vec_foreach (td, km->supported_transforms)
3369 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3370 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3372 vec_add1 (proposal->transforms, *td);
3379 r = clib_error_return (0, "Unsupported algorithm");
3388 vec_foreach (td, km->supported_transforms)
3390 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3392 vec_add1 (proposal->transforms, *td);
3395 sa->dh_group = td->dh_type;
3403 r = clib_error_return (0, "Unsupported algorithm");
3411 vec_foreach (td, km->supported_transforms)
3413 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3415 vec_add1 (proposal->transforms, *td);
3421 r = clib_error_return (0, "Unsupported algorithm");
3430 static ikev2_profile_t *
3431 ikev2_profile_index_by_name (u8 * name)
3433 ikev2_main_t *km = &ikev2_main;
3436 p = mhash_get (&km->profile_index_by_name, name);
3440 return pool_elt_at_index (km->profiles, p[0]);
3445 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3446 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3455 b0 = vlib_get_buffer (vm, bi0);
3456 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3457 udp0 = vlib_buffer_get_current (b0);
3458 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3459 udp0->src_port = clib_host_to_net_u16 (src_port);
3460 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3463 if (ip_addr_version (dst) == AF_IP4)
3465 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3466 ip40 = vlib_buffer_get_current (b0);
3467 ip40->ip_version_and_header_length = 0x45;
3469 ip40->fragment_id = 0;
3470 ip40->flags_and_fragment_offset = 0;
3472 ip40->protocol = IP_PROTOCOL_UDP;
3473 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3474 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3475 b0->current_length =
3476 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3477 ip40->length = clib_host_to_net_u16 (b0->current_length);
3478 ip40->checksum = ip4_header_checksum (ip40);
3482 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3483 ip60 = vlib_buffer_get_current (b0);
3485 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3486 ip60->ip_version_traffic_class_and_flow_label =
3487 clib_host_to_net_u32 (0x6 << 28);
3488 ip60->payload_length =
3489 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3490 ip60->protocol = IP_PROTOCOL_UDP;
3491 ip60->hop_limit = 0xff;
3492 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3493 sizeof (ip60->src_address));
3494 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3495 sizeof (ip60->src_address));
3498 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3499 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3500 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3502 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3503 ip4_lookup_node.index : ip6_lookup_node.index;
3505 /* send the request */
3506 f = vlib_get_frame_to_node (vm, next_index);
3507 to_next = vlib_frame_vector_args (f);
3510 vlib_put_frame_to_node (vm, next_index, f);
3515 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3518 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3523 *b = vlib_get_buffer (vm, bi0);
3528 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3530 ikev2_main_t *km = &ikev2_main;
3533 EVP_PKEY_free (km->pkey);
3534 km->pkey = ikev2_load_key_file (file);
3535 if (km->pkey == NULL)
3536 return clib_error_return (0, "load key '%s' failed", file);
3541 static_always_inline vnet_api_error_t
3542 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3544 ikev2_main_t *km = &ikev2_main;
3545 udp_dst_port_info_t *pi;
3547 uword *v = hash_get (km->udp_ports, port);
3548 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3552 /* IKE already uses this port, only increment reference counter */
3559 return VNET_API_ERROR_UDP_PORT_TAKEN;
3561 udp_register_dst_port (km->vlib_main, port,
3562 ipsec4_tun_input_node.index, 1);
3563 hash_set (km->udp_ports, port, 1);
3565 p->ipsec_over_udp_port = port;
3569 static_always_inline void
3570 ikev2_unregister_udp_port (ikev2_profile_t * p)
3572 ikev2_main_t *km = &ikev2_main;
3575 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3578 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3586 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3587 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3590 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3594 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3595 ikev2_main_per_thread_data_t * tkm,
3598 ikev2_main_t *km = &ikev2_main;
3599 ip_address_t *src, *dst;
3602 /* Create the Initiator notification for IKE SA removal */
3607 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3610 ikev2_log_error ("buffer alloc failure");
3614 ike0 = vlib_buffer_get_current (b0);
3615 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3616 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3617 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3618 vec_resize (sa->del, 1);
3619 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3620 sa->del->spi = sa->ispi;
3621 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3622 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3623 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3628 len = ikev2_insert_non_esp_marker (ike0, len);
3630 if (sa->is_initiator)
3641 ikev2_send_ike (vm, src, dst, bi0, len,
3642 ikev2_get_port (sa), sa->dst_port, 0);
3644 /* delete local SA */
3645 ikev2_child_sa_t *c;
3646 vec_foreach (c, sa->childs)
3647 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3649 u64 rspi = sa->rspi;
3650 ikev2_sa_free_all_vec (sa);
3651 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3654 hash_unset (tkm->sa_by_rspi, rspi);
3655 pool_put (tkm->sas, sa);
3660 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3662 ikev2_main_per_thread_data_t *tkm;
3664 u32 pi = p - km->profiles;
3669 pool_foreach(sa, km->sais, ({
3670 if (pi == sa->profile_index)
3671 vec_add1 (del_sai, sa - km->sais);
3675 vec_foreach (sai, del_sai)
3677 sa = pool_elt_at_index (km->sais, sai[0]);
3678 ikev2_sa_free_all_vec (sa);
3679 hash_unset (km->sa_by_ispi, sa->ispi);
3680 pool_put (km->sais, sa);
3682 vec_reset_length (del_sai);
3684 vec_foreach (tkm, km->per_thread_data)
3687 pool_foreach (sa, tkm->sas, ({
3688 if (sa->profile_index != ~0 && pi == sa->profile_index)
3689 vec_add1 (del_sai, sa - tkm->sas);
3693 vec_foreach (sai, del_sai)
3695 sa = pool_elt_at_index (tkm->sas, sai[0]);
3696 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3699 vec_reset_length (del_sai);
3706 ikev2_profile_free (ikev2_profile_t * p)
3710 vec_free (p->auth.data);
3712 EVP_PKEY_free (p->auth.key);
3714 vec_free (p->loc_id.data);
3715 vec_free (p->rem_id.data);
3719 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3721 ikev2_main_t *km = &ikev2_main;
3726 if (ikev2_profile_index_by_name (name))
3727 return clib_error_return (0, "policy %v already exists", name);
3729 pool_get (km->profiles, p);
3730 clib_memset (p, 0, sizeof (*p));
3731 p->name = vec_dup (name);
3732 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3733 p->responder.sw_if_index = ~0;
3735 uword index = p - km->profiles;
3736 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3740 p = ikev2_profile_index_by_name (name);
3742 return clib_error_return (0, "policy %v does not exists", name);
3744 ikev2_unregister_udp_port (p);
3745 ikev2_cleanup_profile_sessions (km, p);
3747 ikev2_profile_free (p);
3748 pool_put (km->profiles, p);
3749 mhash_unset (&km->profile_index_by_name, name, 0);
3755 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3756 u8 * auth_data, u8 data_hex_format)
3761 p = ikev2_profile_index_by_name (name);
3765 r = clib_error_return (0, "unknown profile %v", name);
3770 EVP_PKEY_free (p->auth.key);
3771 vec_free (p->auth.data);
3773 p->auth.method = auth_method;
3774 p->auth.data = vec_dup (auth_data);
3775 p->auth.hex = data_hex_format;
3777 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3779 vec_add1 (p->auth.data, 0);
3780 p->auth.key = ikev2_load_cert_file (p->auth.data);
3781 if (p->auth.key == NULL)
3782 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3789 ikev2_is_id_supported (u8 id_type)
3791 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3792 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3793 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3794 id_type == IKEV2_ID_TYPE_ID_FQDN);
3798 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3804 if (!ikev2_is_id_supported (id_type))
3806 r = clib_error_return (0, "unsupported identity type %U",
3807 format_ikev2_id_type, id_type);
3811 p = ikev2_profile_index_by_name (name);
3815 r = clib_error_return (0, "unknown profile %v", name);
3821 vec_free (p->loc_id.data);
3822 p->loc_id.type = id_type;
3823 p->loc_id.data = vec_dup (data);
3827 vec_free (p->rem_id.data);
3828 p->rem_id.type = id_type;
3829 p->rem_id.data = vec_dup (data);
3835 static_always_inline void
3836 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3838 if (ip_addr_version (addr) == AF_IP4)
3839 ts->ts_type = TS_IPV4_ADDR_RANGE;
3841 ts->ts_type = TS_IPV6_ADDR_RANGE;
3844 static_always_inline void
3845 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3846 const ip_address_t * end)
3848 ip_address_copy (&ts->start_addr, start);
3849 ip_address_copy (&ts->end_addr, end);
3853 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3854 u16 start_port, u16 end_port, ip_address_t start_addr,
3855 ip_address_t end_addr, int is_local)
3860 p = ikev2_profile_index_by_name (name);
3864 r = clib_error_return (0, "unknown profile %v", name);
3868 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3869 return clib_error_return (0, "IP address version mismatch!");
3873 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3874 p->loc_ts.start_port = start_port;
3875 p->loc_ts.end_port = end_port;
3876 p->loc_ts.protocol_id = protocol_id;
3877 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3881 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3882 p->rem_ts.start_port = start_port;
3883 p->rem_ts.end_port = end_port;
3884 p->rem_ts.protocol_id = protocol_id;
3885 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3893 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3894 u32 sw_if_index, ip_address_t addr)
3899 p = ikev2_profile_index_by_name (name);
3903 r = clib_error_return (0, "unknown profile %v", name);
3907 p->responder.sw_if_index = sw_if_index;
3908 ip_address_copy (&p->responder.addr, &addr);
3914 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3915 ikev2_transform_encr_type_t crypto_alg,
3916 ikev2_transform_integ_type_t integ_alg,
3917 ikev2_transform_dh_type_t dh_type,
3918 u32 crypto_key_size)
3923 p = ikev2_profile_index_by_name (name);
3927 r = clib_error_return (0, "unknown profile %v", name);
3931 p->ike_ts.crypto_alg = crypto_alg;
3932 p->ike_ts.integ_alg = integ_alg;
3933 p->ike_ts.dh_type = dh_type;
3934 p->ike_ts.crypto_key_size = crypto_key_size;
3939 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3940 ikev2_transform_encr_type_t crypto_alg,
3941 ikev2_transform_integ_type_t integ_alg,
3942 u32 crypto_key_size)
3947 p = ikev2_profile_index_by_name (name);
3951 r = clib_error_return (0, "unknown profile %v", name);
3955 p->esp_ts.crypto_alg = crypto_alg;
3956 p->esp_ts.integ_alg = integ_alg;
3957 p->esp_ts.crypto_key_size = crypto_key_size;
3962 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3963 u8 * name, u32 sw_if_index)
3968 p = ikev2_profile_index_by_name (name);
3972 r = clib_error_return (0, "unknown profile %v", name);
3976 p->tun_itf = sw_if_index;
3982 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3985 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3986 ikev2_main_t *km = &ikev2_main;
3987 vnet_api_error_t rv = 0;
3991 return VNET_API_ERROR_INVALID_VALUE;
3995 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3996 return VNET_API_ERROR_VALUE_EXIST;
3998 rv = ikev2_register_udp_port (p, port);
4002 v = hash_get (km->udp_ports, port);
4004 return VNET_API_ERROR_IKE_NO_PORT;
4006 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4007 return VNET_API_ERROR_INVALID_VALUE;
4009 ikev2_unregister_udp_port (p);
4015 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4017 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4022 r = clib_error_return (0, "unknown profile %v", name);
4031 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4032 u64 lifetime, u32 jitter, u32 handover,
4038 p = ikev2_profile_index_by_name (name);
4042 r = clib_error_return (0, "unknown profile %v", name);
4046 p->lifetime = lifetime;
4047 p->lifetime_jitter = jitter;
4048 p->handover = handover;
4049 p->lifetime_maxdata = maxdata;
4054 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4058 ikev2_main_t *km = &ikev2_main;
4060 p = ikev2_profile_index_by_name (name);
4064 r = clib_error_return (0, "unknown profile %v", name);
4068 if (p->responder.sw_if_index == ~0
4069 || ip_address_is_zero (&p->responder.addr))
4071 r = clib_error_return (0, "responder not set for profile %v", name);
4076 /* Create the Initiator Request */
4081 int len = sizeof (ike_header_t);
4082 ip4_address_t *if_ip4;
4083 ip6_address_t *if_ip6;
4084 ip_address_t if_ip = IP_ADDRESS_V4_ALL_0S;
4086 if (ip_addr_version (&p->responder.addr) == AF_IP4)
4088 if_ip4 = ip4_interface_first_address (&ip4_main,
4089 p->responder.sw_if_index, 0);
4092 ip_address_set (&if_ip, if_ip4, AF_IP4);
4097 if_ip6 = ip6_interface_first_address (&ip6_main,
4098 p->responder.sw_if_index);
4101 ip_address_set (&if_ip, if_ip6, AF_IP6);
4105 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4108 char *errmsg = "buffer alloc failure";
4109 ikev2_log_error (errmsg);
4110 return clib_error_return (0, errmsg);
4112 ike0 = vlib_buffer_get_current (b0);
4114 /* Prepare the SA and the IKE payload */
4116 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4117 ikev2_payload_chain_t *chain = 0;
4118 ikev2_payload_new_chain (chain);
4120 /* Build the IKE proposal payload */
4121 ikev2_sa_proposal_t *proposals = 0;
4122 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4123 proposals[0].proposal_num = 1;
4124 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4126 /* Add and then cleanup proposal data */
4127 ikev2_payload_add_sa (chain, proposals);
4128 ikev2_sa_free_proposal_vector (&proposals);
4130 sa.is_initiator = 1;
4131 sa.profile_index = p - km->profiles;
4132 sa.state = IKEV2_STATE_SA_INIT;
4133 sa.tun_itf = p->tun_itf;
4134 sa.udp_encap = p->udp_encap;
4135 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4136 sa.is_tun_itf_set = 1;
4137 sa.initial_contact = 1;
4138 sa.dst_port = IKEV2_PORT;
4139 ikev2_generate_sa_init_data (&sa);
4140 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4141 ikev2_payload_add_nonce (chain, sa.i_nonce);
4143 /* Build the child SA proposal */
4144 vec_resize (sa.childs, 1);
4145 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4146 &sa.childs[0].i_proposals, 0);
4147 sa.childs[0].i_proposals[0].proposal_num = 1;
4148 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4149 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4150 sizeof (sa.childs[0].i_proposals[0].spi));
4152 /* Add NAT detection notification messages (mandatory) */
4153 u8 *nat_detection_sha1 =
4154 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4155 clib_host_to_net_u64 (sa.rspi),
4156 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4158 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4159 nat_detection_sha1);
4160 vec_free (nat_detection_sha1);
4161 nat_detection_sha1 =
4162 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4163 clib_host_to_net_u64 (sa.rspi),
4165 clib_host_to_net_u16 (sa.dst_port));
4166 ikev2_payload_add_notify (chain,
4167 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4168 nat_detection_sha1);
4169 vec_free (nat_detection_sha1);
4171 u8 *sig_hash_algo = vec_new (u8, 8);
4172 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4173 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4174 ikev2_payload_add_notify (chain,
4175 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4177 vec_free (sig_hash_algo);
4180 /* Buffer update and boilerplate */
4181 len += vec_len (chain->data);
4182 ike0->nextpayload = chain->first_payload_type;
4183 ike0->length = clib_host_to_net_u32 (len);
4184 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4185 ikev2_payload_destroy_chain (chain);
4187 ike0->version = IKE_VERSION_2;
4188 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4189 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4190 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4194 /* store whole IKE payload - needed for PSK auth */
4195 vec_reset_length (sa.last_sa_init_req_packet_data);
4196 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4198 /* add data to the SA then add it to the pool */
4199 ip_address_copy (&sa.iaddr, &if_ip);
4200 ip_address_copy (&sa.raddr, &p->responder.addr);
4201 sa.i_id.type = p->loc_id.type;
4202 sa.i_id.data = vec_dup (p->loc_id.data);
4203 sa.r_id.type = p->rem_id.type;
4204 sa.r_id.data = vec_dup (p->rem_id.data);
4205 sa.i_auth.method = p->auth.method;
4206 sa.i_auth.hex = p->auth.hex;
4207 sa.i_auth.data = vec_dup (p->auth.data);
4208 sa.sw_if_index = p->responder.sw_if_index;
4209 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4210 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4212 ikev2_initial_contact_cleanup (0, &sa);
4214 /* add SA to the pool */
4215 ikev2_sa_t *sa0 = 0;
4216 pool_get (km->sais, sa0);
4217 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4218 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4220 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4221 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4223 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4224 clib_host_to_net_u64 (sa0->ispi), 0,
4225 ip_addr_v4 (&p->responder.addr).as_u32,
4226 ip_addr_version (&p->responder.addr) == AF_IP4);
4233 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4234 ikev2_child_sa_t * csa)
4236 /* Create the Initiator notification for child SA removal */
4237 ikev2_main_t *km = &ikev2_main;
4243 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4246 ikev2_log_error ("buffer alloc failure");
4250 ike0 = vlib_buffer_get_current (b0);
4251 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4252 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4253 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4254 vec_resize (sa->del, 1);
4255 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4256 sa->del->spi = csa->i_proposals->spi;
4257 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4258 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4259 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4264 len = ikev2_insert_non_esp_marker (ike0, len);
4265 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4266 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4268 /* delete local child SA */
4269 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4270 ikev2_sa_del_child_sa (sa, csa);
4274 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4277 ikev2_main_t *km = &ikev2_main;
4278 ikev2_main_per_thread_data_t *tkm;
4279 ikev2_sa_t *fsa = 0;
4280 ikev2_child_sa_t *fchild = 0;
4282 /* Search for the child SA */
4283 vec_foreach (tkm, km->per_thread_data)
4289 pool_foreach (sa, tkm->sas, ({
4290 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4300 if (!fchild || !fsa)
4302 r = clib_error_return (0, "Child SA not found");
4307 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4314 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4317 ikev2_main_t *km = &ikev2_main;
4318 ikev2_main_per_thread_data_t *tkm;
4319 ikev2_sa_t *fsa = 0;
4320 ikev2_main_per_thread_data_t *ftkm = 0;
4322 /* Search for the IKE SA */
4323 vec_foreach (tkm, km->per_thread_data)
4329 pool_foreach (sa, tkm->sas, ({
4330 if (sa->ispi == ispi)
4342 r = clib_error_return (0, "IKE SA not found");
4346 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
4351 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4352 ikev2_child_sa_t * csa)
4354 /* Create the Initiator request for create child SA */
4360 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4363 ikev2_log_error ("buffer alloc failure");
4367 ike0 = vlib_buffer_get_current (b0);
4368 ike0->version = IKE_VERSION_2;
4369 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4370 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4371 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4372 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4373 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4374 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4376 ikev2_rekey_t *rekey;
4377 vec_add2 (sa->rekey, rekey, 1);
4378 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4381 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4382 rekey->spi = proposals[0].spi;
4383 rekey->ispi = csa->i_proposals->spi;
4384 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4389 len = ikev2_insert_non_esp_marker (ike0, len);
4390 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4391 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4392 vec_free (proposals);
4396 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4399 ikev2_main_t *km = &ikev2_main;
4400 ikev2_main_per_thread_data_t *tkm;
4401 ikev2_sa_t *fsa = 0;
4402 ikev2_child_sa_t *fchild = 0;
4404 /* Search for the child SA */
4405 vec_foreach (tkm, km->per_thread_data)
4411 pool_foreach (sa, tkm->sas, ({
4412 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4422 if (!fchild || !fsa)
4424 r = clib_error_return (0, "Child SA not found");
4429 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4436 ikev2_init (vlib_main_t * vm)
4438 ikev2_main_t *km = &ikev2_main;
4439 vlib_thread_main_t *tm = vlib_get_thread_main ();
4442 clib_memset (km, 0, sizeof (ikev2_main_t));
4443 km->vnet_main = vnet_get_main ();
4446 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4447 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4448 ikev2_crypto_init (km);
4450 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4452 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4453 CLIB_CACHE_LINE_BYTES);
4454 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4456 ikev2_main_per_thread_data_t *ptd =
4457 vec_elt_at_index (km->per_thread_data, thread_id);
4459 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4461 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4462 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4463 ptd->hmac_ctx = HMAC_CTX_new ();
4465 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4466 ptd->evp_ctx = &ptd->_evp_ctx;
4467 HMAC_CTX_init (&(ptd->_hmac_ctx));
4468 ptd->hmac_ctx = &ptd->_hmac_ctx;
4472 km->sa_by_ispi = hash_create (0, sizeof (uword));
4473 km->sw_if_indices = hash_create (0, 0);
4474 km->udp_ports = hash_create (0, sizeof (uword));
4476 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4477 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4478 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4479 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4481 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4482 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4484 ikev2_cli_reference ();
4486 km->log_level = IKEV2_LOG_ERROR;
4487 km->log_class = vlib_log_register_class ("ikev2", 0);
4492 VLIB_INIT_FUNCTION (ikev2_init) =
4494 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4499 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4502 ikev2_main_t *km = &ikev2_main;
4503 ikev2_profile_t *p = 0;
4504 vlib_main_t *vm = km->vlib_main;
4505 f64 now = vlib_time_now (vm);
4508 if (sa->profile_index != ~0)
4509 p = pool_elt_at_index (km->profiles, sa->profile_index);
4511 if (sa->is_initiator && p && csa->time_to_expiration
4512 && now > csa->time_to_expiration)
4514 if (!csa->is_expired || csa->rekey_retries > 0)
4516 ikev2_rekey_child_sa_internal (vm, sa, csa);
4517 csa->time_to_expiration = now + p->handover;
4518 csa->is_expired = 1;
4519 if (csa->rekey_retries == 0)
4521 csa->rekey_retries = 5;
4523 else if (csa->rekey_retries > 0)
4525 csa->rekey_retries--;
4526 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4527 csa->i_proposals->spi, csa->rekey_retries);
4528 if (csa->rekey_retries == 0)
4530 csa->rekey_retries = -1;
4537 csa->time_to_expiration = 0;
4538 ikev2_delete_child_sa_internal (vm, sa, csa);
4546 ipip_tunnel_t *ipip = NULL;
4547 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4548 if (~0 == sw_if_index)
4550 ip46_address_t local_ip;
4551 ip46_address_t remote_ip;
4552 if (sa->is_initiator)
4554 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4555 ip_addr_bytes (&sa->iaddr));
4556 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4557 ip_addr_bytes (&sa->raddr));
4561 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4562 ip_addr_bytes (&sa->raddr));
4563 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4564 ip_addr_bytes (&sa->iaddr));
4568 ipip_tunnel_key_t key = {
4571 .transport = IPIP_TRANSPORT_IP4,
4576 ipip = ipip_tunnel_db_find (&key);
4579 sw_if_index = ipip->sw_if_index;
4585 vec_add1 (sas_in, csa->remote_sa_id);
4586 vlib_worker_thread_barrier_sync (vm);
4587 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4588 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4589 vlib_worker_thread_barrier_release (vm);
4596 ikev2_set_log_level (ikev2_log_level_t log_level)
4598 ikev2_main_t *km = &ikev2_main;
4600 if (log_level >= IKEV2_LOG_MAX)
4602 ikev2_log_error ("unknown logging level %d", log_level);
4606 km->log_level = log_level;
4611 ikev2_set_liveness_params (u32 period, u32 max_retries)
4613 ikev2_main_t *km = &ikev2_main;
4615 if (period == 0 || max_retries == 0)
4616 return clib_error_return (0, "invalid args");
4618 km->liveness_period = period;
4619 km->liveness_max_retries = max_retries;
4624 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4626 ikev2_main_t *km = &ikev2_main;
4627 vlib_main_t *vm = km->vlib_main;
4628 ikev2_main_per_thread_data_t *tkm;
4629 ikev2_sa_t *fsa = 0;
4630 ikev2_profile_t *p = 0;
4631 ikev2_child_sa_t *fchild = 0;
4632 f64 now = vlib_time_now (vm);
4633 vlib_counter_t counts;
4635 /* Search for the SA and child SA */
4636 vec_foreach (tkm, km->per_thread_data)
4642 pool_foreach (sa, tkm->sas, ({
4643 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4652 vlib_get_combined_counter (&ipsec_sa_counters,
4653 ipsec_sa->stat_index, &counts);
4655 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4656 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4658 if (fchild && p && p->lifetime_maxdata)
4660 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4662 fchild->time_to_expiration = now;
4668 ikev2_process_pending_sa_init (ikev2_main_t * km)
4675 hash_foreach (ispi, sai, km->sa_by_ispi,
4677 sa = pool_elt_at_index (km->sais, sai);
4678 if (sa->init_response_received)
4682 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4685 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4686 clib_memcpy_fast (vlib_buffer_get_current (b),
4687 sa->last_sa_init_req_packet_data,
4688 vec_len (sa->last_sa_init_req_packet_data));
4689 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4690 vec_len (sa->last_sa_init_req_packet_data),
4691 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4697 ikev2_send_informational_request (ikev2_sa_t * sa)
4699 ikev2_main_t *km = &ikev2_main;
4700 ip_address_t *src, *dst;
4707 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4710 ikev2_log_error ("buffer alloc failure");
4714 ike0 = vlib_buffer_get_current (b0);
4715 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4716 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4717 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4718 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4719 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4720 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4725 len = ikev2_insert_non_esp_marker (ike0, len);
4727 if (sa->is_initiator)
4738 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4739 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4743 static_always_inline int
4744 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4746 ikev2_main_t *km = &ikev2_main;
4747 vlib_main_t *vm = km->vlib_main;
4749 if (!sa->keys_generated)
4752 if (sa->liveness_retries >= km->liveness_max_retries)
4755 f64 now = vlib_time_now (vm);
4757 if (sa->liveness_period_check < now)
4759 sa->liveness_retries++;
4760 sa->liveness_period_check = now + km->liveness_period;
4761 ikev2_send_informational_request (sa);
4767 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4770 ikev2_main_t *km = &ikev2_main;
4771 ipsec_main_t *im = &ipsec_main;
4773 ikev2_child_sa_t *c;
4779 vlib_process_wait_for_event_or_clock (vm, 1);
4780 vlib_process_get_events (vm, NULL);
4782 /* process ike child sas */
4783 ikev2_main_per_thread_data_t *tkm;
4784 vec_foreach (tkm, km->per_thread_data)
4787 u32 *to_be_deleted = 0;
4790 pool_foreach (sa, tkm->sas, ({
4791 ikev2_child_sa_t *c;
4794 if (sa->state != IKEV2_STATE_AUTHENTICATED)
4797 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4799 sa->old_remote_id_present = 0;
4803 sa->old_id_expiration -= 1;
4805 vec_foreach (c, sa->childs)
4807 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4810 if (ikev2_mngr_process_responder_sas (sa))
4811 vec_add1 (to_be_deleted, sa - tkm->sas);
4815 vec_foreach (sai, to_be_deleted)
4817 sa = pool_elt_at_index (tkm->sas, sai[0]);
4818 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4819 vec_foreach (c, sa->childs)
4821 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4822 ikev2_sa_del_child_sa (sa, c);
4824 ikev2_sa_free_all_vec (sa);
4825 hash_unset (tkm->sa_by_rspi, sa->rspi);
4826 pool_put (tkm->sas, sa);
4830 p = pool_elt_at_index (km->profiles, sa->profile_index);
4833 ikev2_initiate_sa_init (vm, p->name);
4837 vec_free (to_be_deleted);
4840 /* process ipsec sas */
4843 pool_foreach (sa, im->sad, ({
4844 ikev2_mngr_process_ipsec_sa(sa);
4848 ikev2_process_pending_sa_init (km);
4852 vlib_process_wait_for_event_or_clock (vm, 5);
4853 vlib_process_get_events (vm, NULL);
4862 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4863 .function = ikev2_mngr_process_fn,
4864 .type = VLIB_NODE_TYPE_PROCESS,
4866 "ikev2-manager-process",
4869 VLIB_PLUGIN_REGISTER () = {
4870 .version = VPP_BUILD_VER,
4871 .description = "Internet Key Exchange (IKEv2) Protocol",
4876 * fd.io coding-style-patch-verification: ON
4879 * eval: (c-set-style "gnu")