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_sa_t * sa)
348 ikev2_main_t *km = &ikev2_main;
349 u32 thread_index = vlib_get_thread_index ();
352 ikev2_sa_free_all_vec (sa);
354 p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
357 hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
358 pool_put (km->per_thread_data[thread_index].sas, sa);
363 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
365 ikev2_sa_transform_t *t = 0, *t2;
366 ikev2_main_t *km = &ikev2_main;
368 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
373 /* check if received DH group is on our list of supported groups */
374 vec_foreach (t2, km->supported_transforms)
376 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
385 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
389 if (sa->is_initiator)
392 RAND_bytes ((u8 *) & sa->ispi, 8);
395 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
396 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
401 RAND_bytes ((u8 *) & sa->rspi, 8);
404 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
405 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
408 /* generate dh keys */
409 ikev2_generate_dh (sa, t);
414 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
416 ikev2_sa_transform_t *t = 0, *t2;
417 ikev2_main_t *km = &ikev2_main;
419 /*move some data to the new SA */
420 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
421 sa->i_nonce = _(sai->i_nonce);
422 sa->i_dh_data = _(sai->i_dh_data);
423 sa->dh_private_key = _(sai->dh_private_key);
424 ip_address_copy (&sa->iaddr, &sai->iaddr);
425 ip_address_copy (&sa->raddr, &sai->raddr);
426 sa->is_initiator = sai->is_initiator;
427 sa->i_id.type = sai->i_id.type;
428 sa->r_id.type = sai->r_id.type;
429 sa->profile_index = sai->profile_index;
430 sa->tun_itf = sai->tun_itf;
431 sa->is_tun_itf_set = sai->is_tun_itf_set;
432 sa->i_id.data = _(sai->i_id.data);
433 sa->r_id.data = _(sai->r_id.data);
434 sa->i_auth.method = sai->i_auth.method;
435 sa->i_auth.hex = sai->i_auth.hex;
436 sa->i_auth.data = _(sai->i_auth.data);
437 sa->i_auth.key = _(sai->i_auth.key);
438 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
439 sa->childs = _(sai->childs);
440 sa->udp_encap = sai->udp_encap;
441 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
442 sa->dst_port = sai->dst_port;
443 sa->sw_if_index = sai->sw_if_index;
447 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
452 /* check if received DH group is on our list of supported groups */
453 vec_foreach (t2, km->supported_transforms)
455 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
464 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
469 /* generate dh keys */
470 ikev2_complete_dh (sa, t);
475 ikev2_calc_keys (ikev2_sa_t * sa)
478 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
481 u16 integ_key_len = 0, salt_len = 0;
482 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
484 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
486 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
488 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
491 integ_key_len = tr_integ->key_len;
493 salt_len = sizeof (u32);
495 vec_append (s, sa->i_nonce);
496 vec_append (s, sa->r_nonce);
497 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
499 /* Calculate S = Ni | Nr | SPIi | SPIr */
501 vec_add2 (s, tmp, 2 * sizeof (*spi));
503 spi[0] = clib_host_to_net_u64 (sa->ispi);
504 spi[1] = clib_host_to_net_u64 (sa->rspi);
506 /* calculate PRFplus */
508 int len = tr_prf->key_trunc + /* SK_d */
509 integ_key_len * 2 + /* SK_ai, SK_ar */
510 tr_encr->key_len * 2 + /* SK_ei, SK_er */
511 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
514 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
521 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
522 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
523 pos += tr_prf->key_trunc;
528 sa->sk_ai = vec_new (u8, integ_key_len);
529 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
530 pos += integ_key_len;
533 sa->sk_ar = vec_new (u8, integ_key_len);
534 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
535 pos += integ_key_len;
539 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
540 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
541 pos += tr_encr->key_len + salt_len;
544 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
545 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
546 pos += tr_encr->key_len + salt_len;
549 sa->sk_pi = vec_new (u8, tr_prf->key_len);
550 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
551 pos += tr_prf->key_len;
554 sa->sk_pr = vec_new (u8, tr_prf->key_len);
555 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
556 pos += tr_prf->key_len;
559 sa->keys_generated = 1;
563 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
566 u16 integ_key_len = 0;
569 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
571 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
573 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
575 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
578 integ_key_len = ctr_integ->key_len;
580 salt_len = sizeof (u32);
582 vec_append (s, sa->i_nonce);
583 vec_append (s, sa->r_nonce);
584 /* calculate PRFplus */
586 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
588 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
593 child->sk_ei = vec_new (u8, ctr_encr->key_len);
594 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
595 pos += ctr_encr->key_len;
600 child->sk_ai = vec_new (u8, ctr_integ->key_len);
601 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
602 pos += ctr_integ->key_len;
606 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
611 child->sk_er = vec_new (u8, ctr_encr->key_len);
612 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
613 pos += ctr_encr->key_len;
618 child->sk_ar = vec_new (u8, integ_key_len);
619 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
620 pos += integ_key_len;
624 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
633 static_always_inline u8 *
634 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
636 const u32 max_buf_size =
637 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
638 u8 buf[max_buf_size];
639 u8 *res = vec_new (u8, 20);
641 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
642 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
643 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
644 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
645 SHA1 (buf, sizeof (buf), res);
650 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
653 const ike_ke_payload_header_t *ke = p;
654 u16 plen = clib_net_to_host_u16 (ke->length);
655 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
656 if (sizeof (*ke) > rlen)
659 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
660 vec_reset_length (ke_data[0]);
661 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
666 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
668 const ike_payload_header_t *ikep = p;
669 u16 plen = clib_net_to_host_u16 (ikep->length);
670 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
671 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
676 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
679 if (sizeof (*ikep) > rlen)
681 *plen = clib_net_to_host_u16 (ikep->length);
682 if (*plen < sizeof (*ikep) || *plen > rlen)
688 ikev2_process_sa_init_req (vlib_main_t * vm,
689 ikev2_sa_t * sa, ike_header_t * ike,
690 udp_header_t * udp, u32 len)
692 u8 nonce[IKEV2_NONCE_SIZE];
694 u8 payload = ike->nextpayload;
695 ike_payload_header_t *ikep;
698 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
699 "from ", clib_net_to_host_u64 (ike->ispi),
700 clib_net_to_host_u64 (ike->rspi),
701 ip_addr_v4 (&sa->iaddr).as_u32,
702 ip_addr_version (&sa->iaddr) == AF_IP4);
704 sa->ispi = clib_net_to_host_u64 (ike->ispi);
706 /* store whole IKE payload - needed for PSK auth */
707 vec_reset_length (sa->last_sa_init_req_packet_data);
708 vec_add (sa->last_sa_init_req_packet_data, ike, len);
710 if (len < sizeof (*ike))
713 len -= sizeof (*ike);
714 while (p < len && payload != IKEV2_PAYLOAD_NONE)
716 ikep = (ike_payload_header_t *) & ike->payload[p];
717 int current_length = len - p;
718 if (!ikev2_check_payload_length (ikep, current_length, &plen))
721 if (payload == IKEV2_PAYLOAD_SA)
723 ikev2_sa_free_proposal_vector (&sa->i_proposals);
724 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
726 else if (payload == IKEV2_PAYLOAD_KE)
728 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
732 else if (payload == IKEV2_PAYLOAD_NONCE)
734 vec_reset_length (sa->i_nonce);
735 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
736 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
738 else if (payload == IKEV2_PAYLOAD_NOTIFY)
741 ikev2_parse_notify_payload (ikep, current_length);
742 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
744 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
746 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
749 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
750 " behind NAT", sa->ispi);
754 else if (n->msg_type ==
755 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
757 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
759 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
762 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
763 " (self) behind NAT", sa->ispi);
769 else if (payload == IKEV2_PAYLOAD_VENDOR)
771 ikev2_parse_vendor_payload (ikep);
775 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
777 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
779 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
780 sa->unsupported_cp = payload;
785 payload = ikep->nextpayload;
789 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
794 ikev2_process_sa_init_resp (vlib_main_t * vm,
795 ikev2_sa_t * sa, ike_header_t * ike,
796 udp_header_t * udp, u32 len)
798 u8 nonce[IKEV2_NONCE_SIZE];
800 u8 payload = ike->nextpayload;
801 ike_payload_header_t *ikep;
804 sa->ispi = clib_net_to_host_u64 (ike->ispi);
805 sa->rspi = clib_net_to_host_u64 (ike->rspi);
807 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
808 "from ", sa->ispi, sa->rspi,
809 ip_addr_v4 (&sa->raddr).as_u32,
810 ip_addr_version (&sa->raddr) == AF_IP4);
812 /* store whole IKE payload - needed for PSK auth */
813 vec_reset_length (sa->last_sa_init_res_packet_data);
814 vec_add (sa->last_sa_init_res_packet_data, ike, len);
816 if (sizeof (*ike) > len)
819 len -= sizeof (*ike);
820 while (p < len && payload != IKEV2_PAYLOAD_NONE)
822 int current_length = len - p;
823 ikep = (ike_payload_header_t *) & ike->payload[p];
824 if (!ikev2_check_payload_length (ikep, current_length, &plen))
827 if (payload == IKEV2_PAYLOAD_SA)
829 ikev2_sa_free_proposal_vector (&sa->r_proposals);
830 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
833 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
835 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
838 else if (payload == IKEV2_PAYLOAD_KE)
840 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
844 else if (payload == IKEV2_PAYLOAD_NONCE)
846 vec_reset_length (sa->r_nonce);
847 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
848 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
850 else if (payload == IKEV2_PAYLOAD_NOTIFY)
853 ikev2_parse_notify_payload (ikep, current_length);
854 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
856 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
859 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
861 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
862 " behind NAT, unsupported", sa->ispi);
866 else if (n->msg_type ==
867 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
869 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
872 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
875 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
876 " (self) behind NAT", sa->ispi);
882 else if (payload == IKEV2_PAYLOAD_VENDOR)
884 ikev2_parse_vendor_payload (ikep);
888 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
890 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
892 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
893 sa->unsupported_cp = payload;
898 payload = ikep->nextpayload;
904 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
905 u8 * payload, u32 rlen, u32 * out_len)
907 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
909 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
910 ike_payload_header_t *ikep = 0;
913 ikev2_sa_transform_t *tr_integ;
914 ikev2_sa_transform_t *tr_encr;
916 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
918 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
919 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
921 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
924 if (rlen <= sizeof (*ike))
927 int len = rlen - sizeof (*ike);
929 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
931 ikep = (ike_payload_header_t *) & ike->payload[p];
932 int current_length = len - p;
933 if (!ikev2_check_payload_length (ikep, current_length, &plen))
936 if (*payload == IKEV2_PAYLOAD_SK)
938 last_payload = *payload;
942 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
944 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
946 sa->unsupported_cp = *payload;
951 *payload = ikep->nextpayload;
955 if (last_payload != IKEV2_PAYLOAD_SK)
957 ikev2_elog_error ("Last payload must be SK");
963 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
966 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
967 u8 *aad = (u8 *) ike;
968 u32 aad_len = ikep->payload - aad;
969 u8 *tag = ikep->payload + plen;
971 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
972 plen, aad, aad_len, tag, &dlen);
976 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
981 if (rlen < tr_integ->key_trunc)
985 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
986 (u8 *) ike, rlen - tr_integ->key_trunc);
988 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
991 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
993 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
995 ikev2_elog_error ("message integrity check failed");
1001 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1006 plaintext = ikep->payload + tr_encr->block_size;
1013 static_always_inline int
1014 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1016 if (i1->type != i2->type)
1019 if (vec_len (i1->data) != vec_len (i2->data))
1022 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1029 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
1031 ikev2_main_t *km = &ikev2_main;
1034 ikev2_child_sa_t *c;
1035 u32 thread_index = vlib_get_thread_index ();
1037 if (!sa->initial_contact)
1040 /* find old IKE SAs with the same authenticated identity */
1042 pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
1043 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1044 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1047 if (sa->rspi != tmp->rspi)
1048 vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
1052 for (i = 0; i < vec_len (delete); i++)
1055 pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
1057 tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
1059 ikev2_delete_sa (tmp);
1063 sa->initial_contact = 0;
1067 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1069 const ike_id_payload_header_t *id = p;
1070 u16 plen = clib_net_to_host_u16 (id->length);
1071 if (plen < sizeof (*id) || plen > rlen)
1074 sa_id->type = id->id_type;
1075 vec_reset_length (sa_id->data);
1076 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1082 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1084 const ike_auth_payload_header_t *ah = p;
1085 u16 plen = clib_net_to_host_u16 (ah->length);
1087 a->method = ah->auth_method;
1088 vec_reset_length (a->data);
1089 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1094 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1095 ike_header_t * ike, u32 len)
1098 ikev2_child_sa_t *first_child_sa;
1099 u8 payload = ike->nextpayload;
1101 ike_payload_header_t *ikep;
1105 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1106 "from ", clib_host_to_net_u64 (ike->ispi),
1107 clib_host_to_net_u64 (ike->rspi),
1109 ip_addr_v4 (&sa->raddr).as_u32 :
1110 ip_addr_v4 (&sa->iaddr).as_u32,
1111 ip_addr_version (&sa->raddr) == AF_IP4);
1113 ikev2_calc_keys (sa);
1115 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1119 if (sa->unsupported_cp)
1121 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1127 /* select or create 1st child SA */
1128 if (sa->is_initiator)
1130 first_child_sa = &sa->childs[0];
1134 ikev2_sa_free_all_child_sa (&sa->childs);
1135 vec_add2 (sa->childs, first_child_sa, 1);
1139 /* process encrypted payload */
1140 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1142 ikep = (ike_payload_header_t *) & plaintext[p];
1143 int current_length = dlen - p;
1144 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1147 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1149 if (sa->is_initiator)
1151 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1152 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1157 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1158 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1162 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1164 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1167 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1169 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1172 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1174 if (sa->is_initiator)
1176 if (!ikev2_parse_auth_payload (ikep, current_length,
1182 if (!ikev2_parse_auth_payload (ikep, current_length,
1187 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1190 ikev2_parse_notify_payload (ikep, current_length);
1191 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1193 sa->initial_contact = 1;
1197 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1199 ikev2_parse_vendor_payload (ikep);
1201 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1203 vec_free (first_child_sa->tsi);
1204 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1206 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1208 vec_free (first_child_sa->tsr);
1209 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1213 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1216 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1218 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1219 sa->unsupported_cp = payload;
1224 payload = ikep->nextpayload;
1231 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1236 ikev2_process_informational_req (vlib_main_t * vm,
1237 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1240 u8 payload = ike->nextpayload;
1242 ike_payload_header_t *ikep;
1244 ikev2_notify_t *n = 0;
1246 sa->liveness_retries = 0;
1247 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1248 "from ", clib_host_to_net_u64 (ike->ispi),
1249 clib_host_to_net_u64 (ike->rspi),
1250 ip_addr_v4 (&sa->iaddr).as_u32,
1251 ip_addr_version (&sa->iaddr) == AF_IP4);
1253 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1258 /* process encrypted payload */
1260 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1262 u32 current_length = dlen - p;
1263 if (p + sizeof (*ikep) > dlen)
1266 ikep = (ike_payload_header_t *) & plaintext[p];
1267 u16 plen = clib_net_to_host_u16 (ikep->length);
1269 if (plen < sizeof (*ikep) || plen > current_length)
1272 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1274 n = ikev2_parse_notify_payload (ikep, current_length);
1277 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1278 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1281 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1283 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1285 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1287 ikev2_parse_vendor_payload (ikep);
1291 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1293 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1295 sa->unsupported_cp = payload;
1299 payload = ikep->nextpayload;
1306 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1307 ikev2_sa_t * sa, ike_header_t * ike,
1311 u8 payload = ike->nextpayload;
1314 u8 nonce[IKEV2_NONCE_SIZE];
1316 ike_payload_header_t *ikep;
1317 ikev2_notify_t *n = 0;
1318 ikev2_ts_t *tsi = 0;
1319 ikev2_ts_t *tsr = 0;
1320 ikev2_sa_proposal_t *proposal = 0;
1321 ikev2_child_sa_t *child_sa;
1325 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1326 "from ", clib_host_to_net_u64 (ike->ispi),
1327 clib_host_to_net_u64 (ike->rspi),
1328 ip_addr_v4 (&sa->raddr).as_u32,
1329 ip_addr_version (&sa->raddr) == AF_IP4);
1331 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1334 goto cleanup_and_exit;
1336 /* process encrypted payload */
1338 while (payload != IKEV2_PAYLOAD_NONE)
1340 ikep = (ike_payload_header_t *) & plaintext[p];
1341 int current_length = dlen - p;
1342 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1343 goto cleanup_and_exit;
1345 if (payload == IKEV2_PAYLOAD_SA)
1347 proposal = ikev2_parse_sa_payload (ikep, current_length);
1349 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1351 n = ikev2_parse_notify_payload (ikep, current_length);
1352 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1357 else if (payload == IKEV2_PAYLOAD_DELETE)
1359 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1361 else if (payload == IKEV2_PAYLOAD_VENDOR)
1363 ikev2_parse_vendor_payload (ikep);
1365 else if (payload == IKEV2_PAYLOAD_NONCE)
1367 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1369 else if (payload == IKEV2_PAYLOAD_TSI)
1371 tsi = ikev2_parse_ts_payload (ikep, current_length);
1373 else if (payload == IKEV2_PAYLOAD_TSR)
1375 tsr = ikev2_parse_ts_payload (ikep, current_length);
1379 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1381 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1383 sa->unsupported_cp = payload;
1384 goto cleanup_and_exit;
1387 payload = ikep->nextpayload;
1391 if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1393 ikev2_rekey_t *rekey = &sa->rekey[0];
1394 rekey->protocol_id = proposal->protocol_id;
1396 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1397 rekey->i_proposal->spi = rekey->spi;
1398 rekey->r_proposal = proposal;
1402 vec_reset_length (sa->r_nonce);
1403 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1404 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1407 child_sa->rekey_retries = 0;
1412 ikev2_rekey_t *rekey;
1413 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1416 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1418 goto cleanup_and_exit;
1420 vec_add2 (sa->rekey, rekey, 1);
1421 rekey->protocol_id = n->protocol_id;
1422 rekey->spi = n->spi;
1423 rekey->i_proposal = proposal;
1425 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1429 vec_free (sa->i_nonce);
1430 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1431 /* generate new Nr */
1432 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1433 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1444 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1452 ikev2_sa_transform_t *tr_prf;
1455 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1461 nonce = sa->i_nonce;
1462 packet_data = sa->last_sa_init_res_packet_data;
1468 nonce = sa->r_nonce;
1469 packet_data = sa->last_sa_init_req_packet_data;
1472 data = vec_new (u8, 4);
1474 vec_append (data, id->data);
1476 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1477 vec_append (authmsg, packet_data);
1478 vec_append (authmsg, nonce);
1479 vec_append (authmsg, id_hash);
1487 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1489 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1490 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1491 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1492 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1499 ikev2_sa_match_ts (ikev2_sa_t * sa)
1501 ikev2_main_t *km = &ikev2_main;
1503 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1504 ikev2_id_t *id_rem, *id_loc;
1507 pool_foreach (p, km->profiles, ({
1509 if (sa->is_initiator)
1525 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1526 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1529 sa->profile_index = p - km->profiles;
1531 vec_foreach(ts, sa->childs[0].tsi)
1533 if (ikev2_ts_cmp(p_tsi, ts))
1535 vec_add1 (tsi, ts[0]);
1540 vec_foreach(ts, sa->childs[0].tsr)
1542 if (ikev2_ts_cmp(p_tsr, ts))
1544 vec_add1 (tsr, ts[0]);
1555 vec_free (sa->childs[0].tsi);
1556 vec_free (sa->childs[0].tsr);
1557 sa->childs[0].tsi = tsi;
1558 sa->childs[0].tsr = tsr;
1564 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1569 ikev2_sa_auth (ikev2_sa_t * sa)
1571 ikev2_main_t *km = &ikev2_main;
1572 ikev2_profile_t *p, *sel_p = 0;
1573 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1574 ikev2_sa_transform_t *tr_prf;
1577 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1579 /* only shared key and rsa signature */
1580 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1581 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1583 ikev2_elog_uint (IKEV2_LOG_ERROR,
1584 "unsupported authentication method %u",
1586 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1590 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1591 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1593 ikev2_id_t *id_rem, *id_loc;
1594 ikev2_auth_t *sa_auth;
1596 if (sa->is_initiator)
1600 sa_auth = &sa->r_auth;
1606 sa_auth = &sa->i_auth;
1610 pool_foreach (p, km->profiles, ({
1613 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1614 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1617 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1619 if (!p->auth.data ||
1620 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1623 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1624 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1626 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1628 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1635 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1637 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1640 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1642 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1655 sa->udp_encap = sel_p->udp_encap;
1656 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1660 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1662 if (!sa->is_initiator)
1664 vec_free (sa->r_id.data);
1665 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1666 sa->r_id.type = sel_p->loc_id.type;
1667 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1668 sa->i_id.type = sel_p->rem_id.type;
1670 /* generate our auth data */
1671 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1672 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1674 vec_free (sa->r_auth.data);
1675 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1676 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1678 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1680 vec_free (sa->r_auth.data);
1681 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1682 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1686 /* select transforms for 1st child sa */
1687 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1688 sa->childs[0].r_proposals =
1689 ikev2_select_proposal (sa->childs[0].i_proposals,
1690 IKEV2_PROTOCOL_ESP);
1692 if (~0 != sel_p->tun_itf)
1694 sa->is_tun_itf_set = 1;
1695 sa->tun_itf = sel_p->tun_itf;
1701 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1702 "profile found! ispi %lx", sa->ispi);
1703 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1711 ikev2_sa_auth_init (ikev2_sa_t * sa)
1713 ikev2_main_t *km = &ikev2_main;
1714 u8 *authmsg, *key_pad, *psk = 0;
1715 ikev2_sa_transform_t *tr_prf;
1718 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1720 /* only shared key and rsa signature */
1721 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1722 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1724 ikev2_elog_uint (IKEV2_LOG_ERROR,
1725 "unsupported authentication method %u",
1727 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1731 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1732 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1733 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1735 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1737 vec_free (sa->i_auth.data);
1738 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1739 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1741 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1743 vec_free (sa->i_auth.data);
1744 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1745 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1754 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1756 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1760 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1762 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1772 ipsec_sa_flags_t flags;
1775 ipsec_crypto_alg_t encr_type;
1776 ipsec_integ_alg_t integ_type;
1777 ip46_address_t local_ip;
1778 ip46_address_t remote_ip;
1779 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1781 u32 old_remote_sa_id;
1782 u16 ipsec_over_udp_port;
1785 } ikev2_add_ipsec_tunnel_args_t;
1788 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1790 ikev2_main_t *km = &ikev2_main;
1793 ip46_address_t zero_addr = ip46_address_initializer;
1795 if (~0 == a->sw_if_index)
1797 /* no tunnel associated with the SA/profile - create a new one */
1798 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1799 &a->local_ip, &a->remote_ip, 0,
1800 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1801 TUNNEL_MODE_P2P, &sw_if_index);
1803 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1805 if (hash_get (km->sw_if_indices, sw_if_index))
1806 /* interface is managed by IKE; proceed with updating SAs */
1809 hash_set1 (km->sw_if_indices, sw_if_index);
1813 sw_if_index = a->sw_if_index;
1814 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1819 ikev2_elog_uint (IKEV2_LOG_ERROR,
1820 "installing ipip tunnel failed! local spi: %x",
1826 vec_add1 (sas_in, a->remote_sa_id);
1829 ipsec_tun_protect_del (sw_if_index, NULL);
1831 /* replace local SA immediately */
1832 ipsec_sa_unlock_id (a->local_sa_id);
1834 /* keep the old sa */
1835 vec_add1 (sas_in, a->old_remote_sa_id);
1838 rv |= ipsec_sa_add_and_lock (a->local_sa_id,
1840 IPSEC_PROTOCOL_ESP, a->encr_type,
1841 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1842 a->flags, 0, a->salt_local, &zero_addr,
1843 &zero_addr, NULL, a->src_port, a->dst_port);
1844 rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1845 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1846 a->integ_type, &a->rem_ikey,
1847 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1848 a->salt_remote, &zero_addr,
1849 &zero_addr, NULL, a->ipsec_over_udp_port,
1850 a->ipsec_over_udp_port);
1852 rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1856 ikev2_create_tunnel_interface (vlib_main_t * vm,
1858 ikev2_child_sa_t * child, u32 sa_index,
1859 u32 child_index, u8 is_rekey)
1861 u32 thread_index = vlib_get_thread_index ();
1862 ikev2_main_t *km = &ikev2_main;
1863 ipsec_crypto_alg_t encr_type;
1864 ipsec_integ_alg_t integ_type;
1865 ikev2_profile_t *p = 0;
1866 ikev2_sa_transform_t *tr;
1867 ikev2_sa_proposal_t *proposals;
1869 ikev2_add_ipsec_tunnel_args_t a;
1871 clib_memset (&a, 0, sizeof (a));
1873 if (!child->r_proposals)
1875 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1879 if (sa->is_initiator)
1881 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1882 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1883 proposals = child->r_proposals;
1884 a.local_spi = child->r_proposals[0].spi;
1885 a.remote_spi = child->i_proposals[0].spi;
1889 ip_address_to_46 (&sa->raddr, &a.local_ip);
1890 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1891 proposals = child->i_proposals;
1892 a.local_spi = child->i_proposals[0].spi;
1893 a.remote_spi = child->r_proposals[0].spi;
1896 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1899 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1900 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1903 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1904 a.is_rekey = is_rekey;
1906 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1907 if (tr && tr->esn_type)
1908 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1910 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1913 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1915 switch (tr->key_len)
1918 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1921 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1924 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1927 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1932 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1935 switch (tr->key_len)
1938 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
1941 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
1944 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
1947 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1955 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1961 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1964 a.encr_type = encr_type;
1968 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1971 switch (tr->integ_type)
1973 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
1974 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
1976 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
1977 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
1979 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
1980 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
1982 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
1983 integ_type = IPSEC_INTEG_ALG_SHA1_96;
1986 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1992 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1998 integ_type = IPSEC_INTEG_ALG_NONE;
2001 a.integ_type = integ_type;
2002 ikev2_calc_child_keys (sa, child);
2004 if (sa->is_initiator)
2006 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2007 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2008 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2009 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2012 a.salt_remote = child->salt_er;
2013 a.salt_local = child->salt_ei;
2015 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2019 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2020 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2021 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2022 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2025 a.salt_remote = child->salt_ei;
2026 a.salt_local = child->salt_er;
2028 a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port;
2029 a.src_port = sa->ipsec_over_udp_port;
2032 if (sa->is_initiator && sa->profile_index != ~0)
2033 p = pool_elt_at_index (km->profiles, sa->profile_index);
2035 if (p && p->lifetime)
2037 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2038 if (p->lifetime_jitter)
2040 // This is not much better than rand(3), which Coverity warns
2041 // is unsuitable for security applications; random_u32 is
2042 // however fast. If this perturbance to the expiration time
2043 // needs to use a better RNG then we may need to use something
2044 // like /dev/urandom which has significant overhead.
2045 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2046 rnd = random_u32 (&rnd);
2048 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2052 if (thread_index & 0xffffffc0)
2053 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2055 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2056 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2058 child->local_sa_id =
2060 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2062 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2067 /* create a new remote SA ID to keep the old SA for a bit longer
2068 * so the peer has some time to swap their SAs */
2070 /* use most significat bit of child index part in id */
2072 if (sa->current_remote_id_mask)
2074 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2075 sa->current_remote_id_mask = 0;
2079 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2080 sa->current_remote_id_mask = mask;
2081 remote_sa_id |= mask;
2083 sa->old_id_expiration = 3.0;
2084 sa->old_remote_id_present = 1;
2087 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2089 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2090 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2092 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2093 (u8 *) & a, sizeof (a));
2099 ip46_address_t local_ip;
2100 ip46_address_t remote_ip;
2104 } ikev2_del_ipsec_tunnel_args_t;
2106 static_always_inline u32
2107 ikev2_flip_alternate_sa_bit (u32 id)
2116 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2118 ikev2_main_t *km = &ikev2_main;
2119 ipip_tunnel_t *ipip = NULL;
2122 if (~0 == a->sw_if_index)
2125 ipip_tunnel_key_t key = {
2127 .dst = a->remote_ip,
2128 .transport = IPIP_TRANSPORT_IP4,
2133 ipip = ipip_tunnel_db_find (&key);
2137 sw_if_index = ipip->sw_if_index;
2138 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2145 sw_if_index = a->sw_if_index;
2146 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2149 if (~0 != sw_if_index)
2150 ipsec_tun_protect_del (sw_if_index, NULL);
2152 ipsec_sa_unlock_id (a->remote_sa_id);
2153 ipsec_sa_unlock_id (a->local_sa_id);
2154 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2157 ipip_del_tunnel (ipip->sw_if_index);
2161 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2162 ikev2_child_sa_t * child)
2164 ikev2_del_ipsec_tunnel_args_t a;
2166 clib_memset (&a, 0, sizeof (a));
2168 if (sa->is_initiator)
2170 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2171 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2175 ip_address_to_46 (&sa->raddr, &a.local_ip);
2176 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2179 a.remote_sa_id = child->remote_sa_id;
2180 a.local_sa_id = child->local_sa_id;
2181 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2183 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2189 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2190 ike_header_t * ike, void *user, udp_header_t * udp)
2192 ikev2_main_t *km = &ikev2_main;
2193 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2195 ike_payload_header_t *ph;
2199 ikev2_sa_transform_t *tr_encr, *tr_integ;
2201 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2203 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2205 ikev2_payload_chain_t *chain = 0;
2206 ikev2_payload_new_chain (chain);
2208 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2210 if (sa->r_proposals == 0)
2212 ikev2_payload_add_notify (chain,
2213 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2214 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2216 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2218 u8 *data = vec_new (u8, 2);
2219 ikev2_sa_transform_t *tr_dh;
2221 ikev2_sa_get_td_for_type (sa->r_proposals,
2222 IKEV2_TRANSFORM_TYPE_DH);
2223 ASSERT (tr_dh && tr_dh->dh_type);
2225 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2226 data[1] = (tr_dh->dh_type) & 0xff;
2228 ikev2_payload_add_notify (chain,
2229 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2232 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2234 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2236 u8 *data = vec_new (u8, 1);
2238 data[0] = sa->unsupported_cp;
2239 ikev2_payload_add_notify (chain,
2240 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2248 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2249 ikev2_payload_add_sa (chain, sa->r_proposals);
2250 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2251 ikev2_payload_add_nonce (chain, sa->r_nonce);
2253 u8 *nat_detection_sha1 =
2254 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2255 clib_host_to_net_u64 (sa->rspi),
2256 &sa->raddr, udp->dst_port);
2257 ikev2_payload_add_notify (chain,
2258 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2259 nat_detection_sha1);
2260 vec_free (nat_detection_sha1);
2261 nat_detection_sha1 =
2262 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2263 clib_host_to_net_u64 (sa->rspi),
2264 &sa->iaddr, udp->src_port);
2265 ikev2_payload_add_notify (chain,
2266 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2267 nat_detection_sha1);
2268 vec_free (nat_detection_sha1);
2271 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2273 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2275 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2276 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2277 ikev2_payload_add_auth (chain, &sa->r_auth);
2278 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2279 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2280 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2282 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2284 ikev2_payload_add_notify (chain,
2285 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2287 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2289 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2291 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2293 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2294 ikev2_payload_add_auth (chain, &sa->r_auth);
2296 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2298 ikev2_payload_add_notify (chain,
2299 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2300 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2301 ikev2_payload_add_auth (chain, &sa->r_auth);
2302 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2303 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2305 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2307 u8 *data = vec_new (u8, 1);
2309 data[0] = sa->unsupported_cp;
2310 ikev2_payload_add_notify (chain,
2311 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2315 else if (sa->state == IKEV2_STATE_SA_INIT)
2317 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2318 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2319 ikev2_payload_add_auth (chain, &sa->i_auth);
2320 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2321 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2322 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2323 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2328 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2332 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2334 /* if pending delete */
2337 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2339 if (sa->is_initiator)
2340 ikev2_payload_add_delete (chain, sa->del);
2342 /* The response to a request that deletes the IKE SA is an empty
2343 INFORMATIONAL response. */
2344 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2346 /* The response to a request that deletes ESP or AH SAs will contain
2347 delete payloads for the paired SAs going in the other direction. */
2350 ikev2_payload_add_delete (chain, sa->del);
2355 /* received N(AUTHENTICATION_FAILED) */
2356 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2358 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2361 /* received unsupported critical payload */
2362 else if (sa->unsupported_cp)
2364 u8 *data = vec_new (u8, 1);
2366 data[0] = sa->unsupported_cp;
2367 ikev2_payload_add_notify (chain,
2368 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2371 sa->unsupported_cp = 0;
2373 /* else send empty response */
2375 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2377 if (sa->is_initiator)
2380 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2381 ikev2_notify_t notify;
2382 u8 *data = vec_new (u8, 4);
2383 clib_memset (¬ify, 0, sizeof (notify));
2384 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2385 notify.spi = sa->childs[0].i_proposals->spi;
2386 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2388 ikev2_payload_add_sa (chain, proposals);
2389 ikev2_payload_add_nonce (chain, sa->i_nonce);
2390 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2391 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2392 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2399 if (vec_len (sa->rekey) > 0)
2401 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2402 ikev2_payload_add_nonce (chain, sa->r_nonce);
2403 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2405 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2407 vec_del1 (sa->rekey, 0);
2409 else if (sa->unsupported_cp)
2411 u8 *data = vec_new (u8, 1);
2413 data[0] = sa->unsupported_cp;
2414 ikev2_payload_add_notify (chain,
2415 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2418 sa->unsupported_cp = 0;
2422 ikev2_payload_add_notify (chain,
2423 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2430 ike->version = IKE_VERSION_2;
2431 ike->nextpayload = IKEV2_PAYLOAD_SK;
2432 tlen = sizeof (*ike);
2433 if (sa->is_initiator)
2435 ike->flags = IKEV2_HDR_FLAG_INITIATOR;
2436 sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
2440 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
2444 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2446 tlen += vec_len (chain->data);
2447 ike->nextpayload = chain->first_payload_type;
2448 ike->length = clib_host_to_net_u32 (tlen);
2450 if (tlen + b->current_length + b->current_data > buffer_data_size)
2456 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2458 /* store whole IKE payload - needed for PSK auth */
2459 vec_reset_length (sa->last_sa_init_res_packet_data);
2460 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2464 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2465 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2468 plen = sizeof (*ph);
2469 ph = (ike_payload_header_t *) & ike->payload[0];
2470 ph->nextpayload = chain->first_payload_type;
2473 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2474 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2475 plen += vec_len (chain->data) + iv_len;
2477 /* add space for hmac/tag */
2479 plen += tr_integ->key_trunc;
2481 plen += IKEV2_GCM_ICV_SIZE;
2484 if (tlen + b->current_length + b->current_data > buffer_data_size)
2490 /* payload and total length */
2491 ph->length = clib_host_to_net_u16 (plen);
2492 ike->length = clib_host_to_net_u32 (tlen);
2496 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2497 ph->payload, (u8 *) ike,
2498 sizeof (*ike) + sizeof (*ph),
2499 ph->payload + plen - sizeof (*ph) -
2500 IKEV2_GCM_ICV_SIZE))
2508 if (!ikev2_encrypt_data
2509 (ptd, sa, tr_encr, chain->data, ph->payload))
2515 ikev2_calc_integr (tr_integ,
2516 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2517 (u8 *) ike, tlen - tr_integ->key_trunc);
2518 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2519 sizeof (*ike), integ, tr_integ->key_trunc);
2522 /* store whole IKE payload - needed for retransmit */
2523 vec_reset_length (sa->last_res_packet_data);
2524 vec_add (sa->last_res_packet_data, ike, tlen);
2528 ikev2_payload_destroy_chain (chain);
2534 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2535 ip_address_t raddr, u32 rlen)
2538 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2541 pool_foreach (sa, ptd->sas, ({
2542 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
2543 !ip_address_cmp(&sa->iaddr, &iaddr) &&
2544 !ip_address_cmp(&sa->raddr, &raddr))
2547 u8 payload = ike->nextpayload;
2549 while (p < rlen && payload!= IKEV2_PAYLOAD_NONE) {
2550 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
2551 u32 plen = clib_net_to_host_u16 (ikep->length);
2552 if (plen > p + sizeof (*ike))
2555 if (plen < sizeof(ike_payload_header_t))
2558 if (payload == IKEV2_PAYLOAD_NONCE)
2560 if (!clib_memcmp(sa->i_nonce, ikep->payload,
2561 plen - sizeof(*ikep)))
2563 /* req is retransmit */
2564 if (sa->state == IKEV2_STATE_SA_INIT)
2566 ike_header_t * tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
2567 u32 slen = clib_net_to_host_u32(tmp->length);
2568 ike->ispi = tmp->ispi;
2569 ike->rspi = tmp->rspi;
2570 ike->nextpayload = tmp->nextpayload;
2571 ike->version = tmp->version;
2572 ike->exchange = tmp->exchange;
2573 ike->flags = tmp->flags;
2574 ike->msgid = tmp->msgid;
2575 ike->length = tmp->length;
2576 clib_memcpy_fast(ike->payload, tmp->payload, slen - sizeof(*ike));
2577 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2578 "ispi %lx IKE_SA_INIT retransmit "
2579 "from %d.%d.%d.%d to %d.%d.%d.%d",
2581 ip_addr_v4(&raddr).as_u32,
2582 ip_addr_v4 (&iaddr).as_u32);
2585 /* else ignore req */
2588 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2589 "ispi %lx IKE_SA_INIT ignore "
2590 "from %d.%d.%d.%d to %d.%d.%d.%d",
2592 ip_addr_v4(&raddr).as_u32,
2593 ip_addr_v4(&iaddr).as_u32);
2598 payload = ikep->nextpayload;
2605 /* req is not retransmit */
2610 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2612 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2615 if (msg_id > sa->last_msg_id)
2617 sa->last_msg_id = msg_id;
2621 /* retransmitted req */
2622 if (msg_id == sa->last_msg_id)
2624 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2625 u32 slen = clib_net_to_host_u32 (tmp->length);
2626 ike->ispi = tmp->ispi;
2627 ike->rspi = tmp->rspi;
2628 ike->nextpayload = tmp->nextpayload;
2629 ike->version = tmp->version;
2630 ike->exchange = tmp->exchange;
2631 ike->flags = tmp->flags;
2632 ike->msgid = tmp->msgid;
2633 ike->length = tmp->length;
2634 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2635 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2636 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2637 ip_addr_v4 (&sa->iaddr).as_u32);
2641 /* old req ignore */
2642 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2643 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2644 ip_addr_v4 (&sa->iaddr).as_u32);
2649 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2651 ikev2_main_t *km = &ikev2_main;
2652 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2653 sa->profile_index = ~0;
2657 ikev2_del_sa_init_from_main (u64 * ispi)
2659 ikev2_main_t *km = &ikev2_main;
2660 uword *p = hash_get (km->sa_by_ispi, *ispi);
2663 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2664 hash_unset (km->sa_by_ispi, sai->ispi);
2665 ikev2_sa_free_all_vec (sai);
2666 pool_put (km->sais, sai);
2671 ikev2_del_sa_init (u64 ispi)
2673 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2677 static_always_inline void
2678 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2680 if (sa->is_initiator)
2682 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2683 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2687 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2688 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2692 static_always_inline void
2693 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2695 if (sa->is_initiator)
2697 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2698 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2702 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2703 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2707 static_always_inline void
2708 ikev2_set_ip_address (ikev2_sa_t * sa, const void *src,
2709 const void *dst, const int af, const int is_initiator)
2711 const void *raddr = is_initiator ? src : dst;
2712 const void *iaddr = is_initiator ? dst : src;
2713 ip_address_set (&sa->raddr, raddr, af);
2714 ip_address_set (&sa->iaddr, iaddr, af);
2717 static_always_inline uword
2718 ikev2_node_internal (vlib_main_t * vm,
2719 vlib_node_runtime_t * node, vlib_frame_t * frame,
2722 u32 n_left = frame->n_vectors, *from;
2723 ikev2_main_t *km = &ikev2_main;
2724 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2725 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2726 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2729 from = vlib_frame_vector_args (frame);
2730 vlib_get_buffers (vm, from, bufs, n_left);
2735 vlib_buffer_t *b0 = b[0];
2736 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2737 : IKEV2_NEXT_IP6_ERROR_DROP;
2738 ip4_header_t *ip40 = 0;
2739 ip6_header_t *ip60 = 0;
2742 ikev2_sa_t *sa0 = 0;
2743 ikev2_sa_t sa; /* temporary store for SA */
2746 int is_req = 0, has_non_esp_marker = 0;
2748 if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2750 u8 *ptr = vlib_buffer_get_current (b0);
2751 ip40 = (ip4_header_t *) ptr;
2752 ptr += sizeof (*ip40);
2753 udp0 = (udp_header_t *) ptr;
2754 ptr += sizeof (*udp0);
2755 ike0 = (ike_header_t *) ptr;
2756 ip_hdr_sz = sizeof (*ip40);
2760 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2761 ike0 = vlib_buffer_get_current (b0);
2762 vlib_buffer_advance (b0, -sizeof (*udp0));
2763 udp0 = vlib_buffer_get_current (b0);
2767 ip40 = (ip4_header_t *) ipx_hdr;
2768 ip_hdr_sz = sizeof (*ip40);
2772 ip60 = (ip6_header_t *) ipx_hdr;
2773 ip_hdr_sz = sizeof (*ip60);
2775 vlib_buffer_advance (b0, -ip_hdr_sz);
2778 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2780 /* check for non-esp marker */
2781 if (*((u32 *) ike0) == 0)
2784 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2785 rlen -= sizeof (ikev2_non_esp_marker);
2786 has_non_esp_marker = 1;
2789 if (clib_net_to_host_u32 (ike0->length) != rlen)
2791 vlib_node_increment_counter (vm, node->node_index,
2792 IKEV2_ERROR_BAD_LENGTH, 1);
2796 if (ike0->version != IKE_VERSION_2)
2798 vlib_node_increment_counter (vm, node->node_index,
2799 IKEV2_ERROR_NOT_IKEV2, 1);
2803 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2806 clib_memset (sa0, 0, sizeof (*sa0));
2808 u8 is_initiator = ike0->flags & IKEV2_HDR_FLAG_INITIATOR;
2811 if (ike0->rspi == 0)
2814 ikev2_set_ip_address (sa0, &ip40->dst_address,
2815 &ip40->src_address, AF_IP4,
2818 ikev2_set_ip_address (sa0, &ip60->dst_address,
2819 &ip60->src_address, AF_IP6,
2822 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2825 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2829 vlib_node_increment_counter (vm, node->node_index,
2832 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2834 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2839 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2841 vlib_node_increment_counter (vm, node->node_index,
2842 IKEV2_ERROR_MALFORMED_PACKET,
2845 if (sa0->state == IKEV2_STATE_SA_INIT)
2847 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2849 ikev2_select_proposal (sa0->i_proposals,
2850 IKEV2_PROTOCOL_IKE);
2851 ikev2_generate_sa_init_data (sa0);
2854 if (sa0->state == IKEV2_STATE_SA_INIT
2855 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2857 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2859 vlib_node_increment_counter (vm, node->node_index,
2860 IKEV2_ERROR_NO_BUFF_SPACE,
2864 if (sa0->state == IKEV2_STATE_SA_INIT)
2866 /* add SA to the pool */
2867 pool_get (ptd->sas, sa0);
2868 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2869 ikev2_init_sa (vm, sa0);
2870 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2874 ikev2_sa_free_all_vec (sa0);
2878 else //received sa_init without initiator flag
2881 ikev2_set_ip_address (sa0, &ip40->src_address,
2882 &ip40->dst_address, AF_IP4,
2885 ikev2_set_ip_address (sa0, &ip60->src_address,
2886 &ip60->dst_address, AF_IP6,
2889 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
2891 if (sa0->state == IKEV2_STATE_SA_INIT)
2894 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2895 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
2898 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2900 if (clib_atomic_bool_cmp_and_swap
2901 (&sai->init_response_received, 0, 1))
2903 ikev2_complete_sa_data (sa0, sai);
2904 ikev2_calc_keys (sa0);
2905 ikev2_sa_auth_init (sa0);
2907 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2909 vlib_node_increment_counter (vm,
2911 IKEV2_ERROR_NO_BUFF_SPACE,
2916 /* we've already processed sa-init response */
2917 sa0->state = IKEV2_STATE_UNKNOWN;
2922 if (sa0->state == IKEV2_STATE_SA_INIT)
2924 /* add SA to the pool */
2925 pool_get (ptd->sas, sa0);
2926 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2927 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2931 ikev2_sa_free_all_vec (sa0);
2935 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2938 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2941 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2942 slen = ikev2_retransmit_resp (sa0, ike0);
2945 vlib_node_increment_counter (vm, node->node_index,
2948 IKEV2_ERROR_IKE_REQ_IGNORE
2950 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2955 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2956 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
2958 ikev2_sa_auth (sa0);
2960 vlib_node_increment_counter (vm, node->node_index,
2961 IKEV2_ERROR_MALFORMED_PACKET, 1);
2962 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2964 ikev2_initial_contact_cleanup (sa0);
2965 ikev2_sa_match_ts (sa0);
2966 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2967 ikev2_create_tunnel_interface (vm, sa0,
2972 if (sa0->is_initiator)
2974 ikev2_del_sa_init (sa0->ispi);
2978 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2980 vlib_node_increment_counter (vm, node->node_index,
2981 IKEV2_ERROR_NO_BUFF_SPACE,
2986 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2989 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
2992 sa0 = pool_elt_at_index (ptd->sas, p[0]);
2993 slen = ikev2_retransmit_resp (sa0, ike0);
2996 vlib_node_increment_counter (vm, node->node_index,
2999 IKEV2_ERROR_IKE_REQ_IGNORE
3001 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3006 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3009 vlib_node_increment_counter (vm, node->node_index,
3010 IKEV2_ERROR_MALFORMED_PACKET,
3018 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3020 ikev2_delete_t *d, *tmp, *resp = 0;
3021 vec_foreach (d, sa0->del)
3023 ikev2_child_sa_t *ch_sa;
3024 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3026 !sa0->is_initiator);
3029 ikev2_delete_tunnel_interface (km->vnet_main,
3031 if (!sa0->is_initiator)
3033 vec_add2 (resp, tmp, 1);
3034 tmp->protocol_id = d->protocol_id;
3035 tmp->spi = ch_sa->r_proposals[0].spi;
3037 ikev2_sa_del_child_sa (sa0, ch_sa);
3040 if (!sa0->is_initiator)
3042 vec_free (sa0->del);
3047 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
3049 ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
3050 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3052 vlib_node_increment_counter (vm, node->node_index,
3053 IKEV2_ERROR_NO_BUFF_SPACE,
3058 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3061 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3064 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3065 slen = ikev2_retransmit_resp (sa0, ike0);
3068 vlib_node_increment_counter (vm, node->node_index,
3071 IKEV2_ERROR_IKE_REQ_IGNORE
3073 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3078 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3081 vlib_node_increment_counter (vm, node->node_index,
3082 IKEV2_ERROR_MALFORMED_PACKET,
3090 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3093 ikev2_sa_free_all_child_sa (&sa0->childs);
3094 ikev2_child_sa_t *child;
3095 vec_add2 (sa0->childs, child, 1);
3096 clib_memset (child, 0, sizeof (*child));
3097 child->r_proposals = sa0->rekey[0].r_proposal;
3098 child->i_proposals = sa0->rekey[0].i_proposal;
3099 child->tsi = sa0->rekey[0].tsi;
3100 child->tsr = sa0->rekey[0].tsr;
3101 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3102 child - sa0->childs, 1);
3104 if (sa0->is_initiator)
3106 vec_free (sa0->rekey);
3110 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3112 vlib_node_increment_counter (vm, node->node_index,
3113 IKEV2_ERROR_NO_BUFF_SPACE,
3121 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
3122 "received from %d.%d.%d.%d to %d.%d.%d.%d",
3124 ip40->src_address.as_u32,
3125 ip40->dst_address.as_u32);
3129 /* if we are sending packet back, rewrite headers */
3130 if (slen && ~0 != slen)
3134 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3135 ikev2_rewrite_v4_addrs (sa0, ip40);
3139 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3140 ikev2_rewrite_v6_addrs (sa0, ip60);
3145 udp0->dst_port = udp0->src_port =
3146 clib_net_to_host_u16 (ikev2_get_port (sa0));
3148 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3151 if (!has_non_esp_marker)
3152 slen = ikev2_insert_non_esp_marker (ike0, slen);
3157 if (has_non_esp_marker)
3158 slen += sizeof (ikev2_non_esp_marker);
3160 u16 tp = udp0->dst_port;
3161 udp0->dst_port = udp0->src_port;
3162 udp0->src_port = tp;
3165 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3167 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3170 ip40->length = clib_host_to_net_u16 (b0->current_length);
3171 ip40->checksum = ip4_header_checksum (ip40);
3175 ip60->payload_length =
3176 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3180 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3181 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3183 ikev2_child_sa_t *c;
3185 vec_foreach (c, sa0->childs)
3186 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3188 ikev2_delete_sa (sa0);
3190 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3191 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3194 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3195 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3196 t->next_index = next[0];
3203 vlib_node_increment_counter (vm, node->node_index,
3204 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3205 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3206 return frame->n_vectors;
3210 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3212 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3216 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3218 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3222 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3223 .function = ikev2_ip4,
3224 .name = "ikev2-ip4",
3225 .vector_size = sizeof (u32),
3226 .format_trace = format_ikev2_trace,
3227 .type = VLIB_NODE_TYPE_INTERNAL,
3229 .n_errors = ARRAY_LEN(ikev2_error_strings),
3230 .error_strings = ikev2_error_strings,
3232 .n_next_nodes = IKEV2_IP4_N_NEXT,
3234 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3235 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3239 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3240 .function = ikev2_ip6,
3241 .name = "ikev2-ip6",
3242 .vector_size = sizeof (u32),
3243 .format_trace = format_ikev2_trace,
3244 .type = VLIB_NODE_TYPE_INTERNAL,
3246 .n_errors = ARRAY_LEN(ikev2_error_strings),
3247 .error_strings = ikev2_error_strings,
3249 .n_next_nodes = IKEV2_IP6_N_NEXT,
3251 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3252 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3257 // set ikev2 proposals when vpp is used as initiator
3258 static clib_error_t *
3259 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3260 ikev2_transforms_set * ts,
3261 ikev2_sa_proposal_t ** proposals, int is_ike)
3264 ikev2_main_t *km = &ikev2_main;
3265 ikev2_sa_proposal_t *proposal;
3266 vec_add2 (*proposals, proposal, 1);
3267 ikev2_sa_transform_t *td;
3272 vec_foreach (td, km->supported_transforms)
3274 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3275 && td->encr_type == ts->crypto_alg
3276 && td->key_len == ts->crypto_key_size / 8)
3279 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3280 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3281 vec_add (td->attrs, (u8 *) attr, 4);
3282 vec_add1 (proposal->transforms, *td);
3291 r = clib_error_return (0, "Unsupported algorithm");
3295 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3299 vec_foreach (td, km->supported_transforms)
3301 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3302 && td->integ_type == ts->integ_alg)
3304 vec_add1 (proposal->transforms, *td);
3312 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3313 r = clib_error_return (0, "Unsupported algorithm");
3322 vec_foreach (td, km->supported_transforms)
3324 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3325 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3327 vec_add1 (proposal->transforms, *td);
3334 r = clib_error_return (0, "Unsupported algorithm");
3343 vec_foreach (td, km->supported_transforms)
3345 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3347 vec_add1 (proposal->transforms, *td);
3350 sa->dh_group = td->dh_type;
3358 r = clib_error_return (0, "Unsupported algorithm");
3366 vec_foreach (td, km->supported_transforms)
3368 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3370 vec_add1 (proposal->transforms, *td);
3376 r = clib_error_return (0, "Unsupported algorithm");
3385 static ikev2_profile_t *
3386 ikev2_profile_index_by_name (u8 * name)
3388 ikev2_main_t *km = &ikev2_main;
3391 p = mhash_get (&km->profile_index_by_name, name);
3395 return pool_elt_at_index (km->profiles, p[0]);
3400 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3401 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3410 b0 = vlib_get_buffer (vm, bi0);
3411 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3412 udp0 = vlib_buffer_get_current (b0);
3413 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3414 udp0->src_port = clib_host_to_net_u16 (src_port);
3415 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3418 if (ip_addr_version (dst) == AF_IP4)
3420 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3421 ip40 = vlib_buffer_get_current (b0);
3422 ip40->ip_version_and_header_length = 0x45;
3424 ip40->fragment_id = 0;
3425 ip40->flags_and_fragment_offset = 0;
3427 ip40->protocol = IP_PROTOCOL_UDP;
3428 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3429 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3430 b0->current_length =
3431 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3432 ip40->length = clib_host_to_net_u16 (b0->current_length);
3433 ip40->checksum = ip4_header_checksum (ip40);
3437 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3438 ip60 = vlib_buffer_get_current (b0);
3440 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3441 ip60->ip_version_traffic_class_and_flow_label =
3442 clib_host_to_net_u32 (0x6 << 28);
3443 ip60->payload_length =
3444 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3445 ip60->protocol = IP_PROTOCOL_UDP;
3446 ip60->hop_limit = 0xff;
3447 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3448 sizeof (ip60->src_address));
3449 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3450 sizeof (ip60->src_address));
3453 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3454 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3455 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3457 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3458 ip4_lookup_node.index : ip6_lookup_node.index;
3460 /* send the request */
3461 f = vlib_get_frame_to_node (vm, next_index);
3462 to_next = vlib_frame_vector_args (f);
3465 vlib_put_frame_to_node (vm, next_index, f);
3470 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3473 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3478 *b = vlib_get_buffer (vm, bi0);
3483 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3485 ikev2_main_t *km = &ikev2_main;
3488 EVP_PKEY_free (km->pkey);
3489 km->pkey = ikev2_load_key_file (file);
3490 if (km->pkey == NULL)
3491 return clib_error_return (0, "load key '%s' failed", file);
3496 static_always_inline vnet_api_error_t
3497 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3499 ikev2_main_t *km = &ikev2_main;
3500 udp_dst_port_info_t *pi;
3502 uword *v = hash_get (km->udp_ports, port);
3503 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3507 /* IKE already uses this port, only increment reference counter */
3514 return VNET_API_ERROR_UDP_PORT_TAKEN;
3516 udp_register_dst_port (km->vlib_main, port,
3517 ipsec4_tun_input_node.index, 1);
3518 hash_set (km->udp_ports, port, 1);
3520 p->ipsec_over_udp_port = port;
3524 static_always_inline void
3525 ikev2_unregister_udp_port (ikev2_profile_t * p)
3527 ikev2_main_t *km = &ikev2_main;
3530 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3533 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3541 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3542 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3545 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3549 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3550 ikev2_main_per_thread_data_t * tkm,
3553 ikev2_main_t *km = &ikev2_main;
3554 ip_address_t *src, *dst;
3557 /* Create the Initiator notification for IKE SA removal */
3562 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3565 ikev2_log_error ("buffer alloc failure");
3569 ike0 = vlib_buffer_get_current (b0);
3570 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3571 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3572 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3573 vec_resize (sa->del, 1);
3574 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3575 sa->del->spi = sa->ispi;
3576 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3577 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3578 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3582 if (sa->is_initiator)
3593 ikev2_send_ike (vm, src, dst, bi0, len,
3594 ikev2_get_port (sa), sa->dst_port, 0);
3596 /* delete local SA */
3597 ikev2_child_sa_t *c;
3598 vec_foreach (c, sa->childs)
3599 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3601 u64 rspi = sa->rspi;
3602 ikev2_sa_free_all_vec (sa);
3603 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3606 hash_unset (tkm->sa_by_rspi, rspi);
3607 pool_put (tkm->sas, sa);
3612 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3614 ikev2_main_per_thread_data_t *tkm;
3616 u32 pi = p - km->profiles;
3621 pool_foreach(sa, km->sais, ({
3622 if (pi == sa->profile_index)
3623 vec_add1 (del_sai, sa - km->sais);
3627 vec_foreach (sai, del_sai)
3629 sa = pool_elt_at_index (km->sais, sai[0]);
3630 ikev2_sa_free_all_vec (sa);
3631 hash_unset (km->sa_by_ispi, sa->ispi);
3632 pool_put (km->sais, sa);
3634 vec_reset_length (del_sai);
3636 vec_foreach (tkm, km->per_thread_data)
3639 pool_foreach (sa, tkm->sas, ({
3640 if (sa->profile_index != ~0 && pi == sa->profile_index)
3641 vec_add1 (del_sai, sa - tkm->sas);
3645 vec_foreach (sai, del_sai)
3647 sa = pool_elt_at_index (tkm->sas, sai[0]);
3648 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa);
3651 vec_reset_length (del_sai);
3658 ikev2_profile_free (ikev2_profile_t * p)
3662 vec_free (p->auth.data);
3664 EVP_PKEY_free (p->auth.key);
3666 vec_free (p->loc_id.data);
3667 vec_free (p->rem_id.data);
3671 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3673 ikev2_main_t *km = &ikev2_main;
3678 if (ikev2_profile_index_by_name (name))
3679 return clib_error_return (0, "policy %v already exists", name);
3681 pool_get (km->profiles, p);
3682 clib_memset (p, 0, sizeof (*p));
3683 p->name = vec_dup (name);
3684 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3685 p->responder.sw_if_index = ~0;
3687 uword index = p - km->profiles;
3688 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3692 p = ikev2_profile_index_by_name (name);
3694 return clib_error_return (0, "policy %v does not exists", name);
3696 ikev2_unregister_udp_port (p);
3697 ikev2_cleanup_profile_sessions (km, p);
3699 ikev2_profile_free (p);
3700 pool_put (km->profiles, p);
3701 mhash_unset (&km->profile_index_by_name, name, 0);
3707 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3708 u8 * auth_data, u8 data_hex_format)
3713 p = ikev2_profile_index_by_name (name);
3717 r = clib_error_return (0, "unknown profile %v", name);
3722 EVP_PKEY_free (p->auth.key);
3723 vec_free (p->auth.data);
3725 p->auth.method = auth_method;
3726 p->auth.data = vec_dup (auth_data);
3727 p->auth.hex = data_hex_format;
3729 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3731 vec_add1 (p->auth.data, 0);
3732 p->auth.key = ikev2_load_cert_file (p->auth.data);
3733 if (p->auth.key == NULL)
3734 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3741 ikev2_is_id_supported (u8 id_type)
3743 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3744 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3745 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3746 id_type == IKEV2_ID_TYPE_ID_FQDN);
3750 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3756 if (!ikev2_is_id_supported (id_type))
3758 r = clib_error_return (0, "unsupported identity type %U",
3759 format_ikev2_id_type, id_type);
3763 p = ikev2_profile_index_by_name (name);
3767 r = clib_error_return (0, "unknown profile %v", name);
3773 vec_free (p->loc_id.data);
3774 p->loc_id.type = id_type;
3775 p->loc_id.data = vec_dup (data);
3779 vec_free (p->rem_id.data);
3780 p->rem_id.type = id_type;
3781 p->rem_id.data = vec_dup (data);
3787 static_always_inline void
3788 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3790 if (ip_addr_version (addr) == AF_IP4)
3791 ts->ts_type = TS_IPV4_ADDR_RANGE;
3793 ts->ts_type = TS_IPV6_ADDR_RANGE;
3796 static_always_inline void
3797 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3798 const ip_address_t * end)
3800 ip_address_copy (&ts->start_addr, start);
3801 ip_address_copy (&ts->end_addr, end);
3805 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3806 u16 start_port, u16 end_port, ip_address_t start_addr,
3807 ip_address_t end_addr, int is_local)
3812 p = ikev2_profile_index_by_name (name);
3816 r = clib_error_return (0, "unknown profile %v", name);
3820 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3821 return clib_error_return (0, "IP address version mismatch!");
3825 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3826 p->loc_ts.start_port = start_port;
3827 p->loc_ts.end_port = end_port;
3828 p->loc_ts.protocol_id = protocol_id;
3829 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3833 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3834 p->rem_ts.start_port = start_port;
3835 p->rem_ts.end_port = end_port;
3836 p->rem_ts.protocol_id = protocol_id;
3837 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3845 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3846 u32 sw_if_index, ip_address_t addr)
3851 p = ikev2_profile_index_by_name (name);
3855 r = clib_error_return (0, "unknown profile %v", name);
3859 p->responder.sw_if_index = sw_if_index;
3860 ip_address_copy (&p->responder.addr, &addr);
3866 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3867 ikev2_transform_encr_type_t crypto_alg,
3868 ikev2_transform_integ_type_t integ_alg,
3869 ikev2_transform_dh_type_t dh_type,
3870 u32 crypto_key_size)
3875 p = ikev2_profile_index_by_name (name);
3879 r = clib_error_return (0, "unknown profile %v", name);
3883 p->ike_ts.crypto_alg = crypto_alg;
3884 p->ike_ts.integ_alg = integ_alg;
3885 p->ike_ts.dh_type = dh_type;
3886 p->ike_ts.crypto_key_size = crypto_key_size;
3891 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
3892 ikev2_transform_encr_type_t crypto_alg,
3893 ikev2_transform_integ_type_t integ_alg,
3894 u32 crypto_key_size)
3899 p = ikev2_profile_index_by_name (name);
3903 r = clib_error_return (0, "unknown profile %v", name);
3907 p->esp_ts.crypto_alg = crypto_alg;
3908 p->esp_ts.integ_alg = integ_alg;
3909 p->esp_ts.crypto_key_size = crypto_key_size;
3914 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
3915 u8 * name, u32 sw_if_index)
3920 p = ikev2_profile_index_by_name (name);
3924 r = clib_error_return (0, "unknown profile %v", name);
3928 p->tun_itf = sw_if_index;
3934 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
3937 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3938 ikev2_main_t *km = &ikev2_main;
3939 vnet_api_error_t rv = 0;
3943 return VNET_API_ERROR_INVALID_VALUE;
3947 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
3948 return VNET_API_ERROR_VALUE_EXIST;
3950 rv = ikev2_register_udp_port (p, port);
3954 v = hash_get (km->udp_ports, port);
3956 return VNET_API_ERROR_IKE_NO_PORT;
3958 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3959 return VNET_API_ERROR_INVALID_VALUE;
3961 ikev2_unregister_udp_port (p);
3967 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
3969 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
3974 r = clib_error_return (0, "unknown profile %v", name);
3983 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
3984 u64 lifetime, u32 jitter, u32 handover,
3990 p = ikev2_profile_index_by_name (name);
3994 r = clib_error_return (0, "unknown profile %v", name);
3998 p->lifetime = lifetime;
3999 p->lifetime_jitter = jitter;
4000 p->handover = handover;
4001 p->lifetime_maxdata = maxdata;
4006 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4010 ikev2_main_t *km = &ikev2_main;
4012 p = ikev2_profile_index_by_name (name);
4016 r = clib_error_return (0, "unknown profile %v", name);
4020 if (p->responder.sw_if_index == ~0
4021 || ip_address_is_zero (&p->responder.addr))
4023 r = clib_error_return (0, "responder not set for profile %v", name);
4028 /* Create the Initiator Request */
4033 int len = sizeof (ike_header_t);
4034 ip4_address_t *if_ip4;
4035 ip6_address_t *if_ip6;
4036 ip_address_t if_ip = IP_ADDRESS_V4_ALL_0S;
4038 if (ip_addr_version (&p->responder.addr) == AF_IP4)
4040 if_ip4 = ip4_interface_first_address (&ip4_main,
4041 p->responder.sw_if_index, 0);
4044 ip_address_set (&if_ip, if_ip4, AF_IP4);
4049 if_ip6 = ip6_interface_first_address (&ip6_main,
4050 p->responder.sw_if_index);
4053 ip_address_set (&if_ip, if_ip6, AF_IP6);
4057 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4060 char *errmsg = "buffer alloc failure";
4061 ikev2_log_error (errmsg);
4062 return clib_error_return (0, errmsg);
4064 ike0 = vlib_buffer_get_current (b0);
4066 /* Prepare the SA and the IKE payload */
4068 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4069 ikev2_payload_chain_t *chain = 0;
4070 ikev2_payload_new_chain (chain);
4072 /* Build the IKE proposal payload */
4073 ikev2_sa_proposal_t *proposals = 0;
4074 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4075 proposals[0].proposal_num = 1;
4076 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4078 /* Add and then cleanup proposal data */
4079 ikev2_payload_add_sa (chain, proposals);
4080 ikev2_sa_free_proposal_vector (&proposals);
4082 sa.is_initiator = 1;
4083 sa.profile_index = p - km->profiles;
4084 sa.state = IKEV2_STATE_SA_INIT;
4085 sa.tun_itf = p->tun_itf;
4086 sa.udp_encap = p->udp_encap;
4087 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4088 sa.is_tun_itf_set = 1;
4089 sa.initial_contact = 1;
4090 sa.dst_port = IKEV2_PORT;
4091 ikev2_generate_sa_init_data (&sa);
4092 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4093 ikev2_payload_add_nonce (chain, sa.i_nonce);
4095 /* Build the child SA proposal */
4096 vec_resize (sa.childs, 1);
4097 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4098 &sa.childs[0].i_proposals, 0);
4099 sa.childs[0].i_proposals[0].proposal_num = 1;
4100 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4101 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4102 sizeof (sa.childs[0].i_proposals[0].spi));
4104 /* Add NAT detection notification messages (mandatory) */
4105 u8 *nat_detection_sha1 =
4106 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4107 clib_host_to_net_u64 (sa.rspi),
4108 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4110 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4111 nat_detection_sha1);
4112 vec_free (nat_detection_sha1);
4113 nat_detection_sha1 =
4114 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4115 clib_host_to_net_u64 (sa.rspi),
4117 clib_host_to_net_u16 (sa.dst_port));
4118 ikev2_payload_add_notify (chain,
4119 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4120 nat_detection_sha1);
4121 vec_free (nat_detection_sha1);
4123 u8 *sig_hash_algo = vec_new (u8, 8);
4124 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4125 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4126 ikev2_payload_add_notify (chain,
4127 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4129 vec_free (sig_hash_algo);
4132 /* Buffer update and boilerplate */
4133 len += vec_len (chain->data);
4134 ike0->nextpayload = chain->first_payload_type;
4135 ike0->length = clib_host_to_net_u32 (len);
4136 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4137 ikev2_payload_destroy_chain (chain);
4139 ike0->version = IKE_VERSION_2;
4140 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4141 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4142 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4146 /* store whole IKE payload - needed for PSK auth */
4147 vec_reset_length (sa.last_sa_init_req_packet_data);
4148 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4150 /* add data to the SA then add it to the pool */
4151 ip_address_copy (&sa.iaddr, &if_ip);
4152 ip_address_copy (&sa.raddr, &p->responder.addr);
4153 sa.i_id.type = p->loc_id.type;
4154 sa.i_id.data = vec_dup (p->loc_id.data);
4155 sa.r_id.type = p->rem_id.type;
4156 sa.r_id.data = vec_dup (p->rem_id.data);
4157 sa.i_auth.method = p->auth.method;
4158 sa.i_auth.hex = p->auth.hex;
4159 sa.i_auth.data = vec_dup (p->auth.data);
4160 sa.sw_if_index = p->responder.sw_if_index;
4161 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4162 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4164 ikev2_initial_contact_cleanup (&sa);
4166 /* add SA to the pool */
4167 ikev2_sa_t *sa0 = 0;
4168 pool_get (km->sais, sa0);
4169 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4170 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4172 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4173 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4175 ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4176 clib_host_to_net_u64 (sa0->ispi), 0,
4177 ip_addr_v4 (&p->responder.addr).as_u32,
4178 ip_addr_version (&p->responder.addr) == AF_IP4);
4185 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4186 ikev2_child_sa_t * csa)
4188 /* Create the Initiator notification for child SA removal */
4189 ikev2_main_t *km = &ikev2_main;
4195 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4198 ikev2_log_error ("buffer alloc failure");
4202 ike0 = vlib_buffer_get_current (b0);
4203 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4204 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4205 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4206 vec_resize (sa->del, 1);
4207 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4208 sa->del->spi = csa->i_proposals->spi;
4209 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4210 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4211 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4216 len = ikev2_insert_non_esp_marker (ike0, len);
4217 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4218 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4220 /* delete local child SA */
4221 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4222 ikev2_sa_del_child_sa (sa, csa);
4226 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4229 ikev2_main_t *km = &ikev2_main;
4230 ikev2_main_per_thread_data_t *tkm;
4231 ikev2_sa_t *fsa = 0;
4232 ikev2_child_sa_t *fchild = 0;
4234 /* Search for the child SA */
4235 vec_foreach (tkm, km->per_thread_data)
4241 pool_foreach (sa, tkm->sas, ({
4242 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4252 if (!fchild || !fsa)
4254 r = clib_error_return (0, "Child SA not found");
4259 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4266 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4269 ikev2_main_t *km = &ikev2_main;
4270 ikev2_main_per_thread_data_t *tkm;
4271 ikev2_sa_t *fsa = 0;
4272 ikev2_main_per_thread_data_t *ftkm = 0;
4274 /* Search for the IKE SA */
4275 vec_foreach (tkm, km->per_thread_data)
4281 pool_foreach (sa, tkm->sas, ({
4282 if (sa->ispi == ispi)
4294 r = clib_error_return (0, "IKE SA not found");
4298 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa);
4303 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4304 ikev2_child_sa_t * csa)
4306 /* Create the Initiator request for create child SA */
4312 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4315 ikev2_log_error ("buffer alloc failure");
4319 ike0 = vlib_buffer_get_current (b0);
4320 ike0->version = IKE_VERSION_2;
4321 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4322 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4323 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4324 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4325 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4326 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4328 ikev2_rekey_t *rekey;
4329 vec_add2 (sa->rekey, rekey, 1);
4330 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4333 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4334 rekey->spi = proposals[0].spi;
4335 rekey->ispi = csa->i_proposals->spi;
4336 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4341 len = ikev2_insert_non_esp_marker (ike0, len);
4342 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4343 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4344 vec_free (proposals);
4348 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4351 ikev2_main_t *km = &ikev2_main;
4352 ikev2_main_per_thread_data_t *tkm;
4353 ikev2_sa_t *fsa = 0;
4354 ikev2_child_sa_t *fchild = 0;
4356 /* Search for the child SA */
4357 vec_foreach (tkm, km->per_thread_data)
4363 pool_foreach (sa, tkm->sas, ({
4364 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4374 if (!fchild || !fsa)
4376 r = clib_error_return (0, "Child SA not found");
4381 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4388 ikev2_init (vlib_main_t * vm)
4390 ikev2_main_t *km = &ikev2_main;
4391 vlib_thread_main_t *tm = vlib_get_thread_main ();
4394 clib_memset (km, 0, sizeof (ikev2_main_t));
4395 km->vnet_main = vnet_get_main ();
4398 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4399 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4400 ikev2_crypto_init (km);
4402 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4404 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4405 CLIB_CACHE_LINE_BYTES);
4406 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4408 ikev2_main_per_thread_data_t *ptd =
4409 vec_elt_at_index (km->per_thread_data, thread_id);
4411 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4413 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4414 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4415 ptd->hmac_ctx = HMAC_CTX_new ();
4417 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4418 ptd->evp_ctx = &ptd->_evp_ctx;
4419 HMAC_CTX_init (&(ptd->_hmac_ctx));
4420 ptd->hmac_ctx = &ptd->_hmac_ctx;
4424 km->sa_by_ispi = hash_create (0, sizeof (uword));
4425 km->sw_if_indices = hash_create (0, 0);
4426 km->udp_ports = hash_create (0, sizeof (uword));
4428 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4429 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4430 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4431 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4433 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4434 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4436 ikev2_cli_reference ();
4438 km->log_level = IKEV2_LOG_ERROR;
4439 km->log_class = vlib_log_register_class ("ikev2", 0);
4444 VLIB_INIT_FUNCTION (ikev2_init) =
4446 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4451 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4454 ikev2_main_t *km = &ikev2_main;
4455 ikev2_profile_t *p = 0;
4456 vlib_main_t *vm = km->vlib_main;
4457 f64 now = vlib_time_now (vm);
4460 if (sa->profile_index != ~0)
4461 p = pool_elt_at_index (km->profiles, sa->profile_index);
4463 if (sa->is_initiator && p && csa->time_to_expiration
4464 && now > csa->time_to_expiration)
4466 if (!csa->is_expired || csa->rekey_retries > 0)
4468 ikev2_rekey_child_sa_internal (vm, sa, csa);
4469 csa->time_to_expiration = now + p->handover;
4470 csa->is_expired = 1;
4471 if (csa->rekey_retries == 0)
4473 csa->rekey_retries = 5;
4475 else if (csa->rekey_retries > 0)
4477 csa->rekey_retries--;
4478 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4479 csa->i_proposals->spi, csa->rekey_retries);
4480 if (csa->rekey_retries == 0)
4482 csa->rekey_retries = -1;
4489 csa->time_to_expiration = 0;
4490 ikev2_delete_child_sa_internal (vm, sa, csa);
4498 ipip_tunnel_t *ipip = NULL;
4499 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4500 if (~0 == sw_if_index)
4502 ip46_address_t local_ip;
4503 ip46_address_t remote_ip;
4504 if (sa->is_initiator)
4506 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4507 ip_addr_bytes (&sa->iaddr));
4508 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4509 ip_addr_bytes (&sa->raddr));
4513 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4514 ip_addr_bytes (&sa->raddr));
4515 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4516 ip_addr_bytes (&sa->iaddr));
4520 ipip_tunnel_key_t key = {
4523 .transport = IPIP_TRANSPORT_IP4,
4528 ipip = ipip_tunnel_db_find (&key);
4531 sw_if_index = ipip->sw_if_index;
4537 vec_add1 (sas_in, csa->remote_sa_id);
4538 vlib_worker_thread_barrier_sync (vm);
4539 ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in);
4540 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4541 vlib_worker_thread_barrier_release (vm);
4548 ikev2_set_log_level (ikev2_log_level_t log_level)
4550 ikev2_main_t *km = &ikev2_main;
4552 if (log_level >= IKEV2_LOG_MAX)
4554 ikev2_log_error ("unknown logging level %d", log_level);
4558 km->log_level = log_level;
4563 ikev2_set_liveness_params (u32 period, u32 max_retries)
4565 ikev2_main_t *km = &ikev2_main;
4567 if (period == 0 || max_retries == 0)
4568 return clib_error_return (0, "invalid args");
4570 km->liveness_period = period;
4571 km->liveness_max_retries = max_retries;
4576 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4578 ikev2_main_t *km = &ikev2_main;
4579 vlib_main_t *vm = km->vlib_main;
4580 ikev2_main_per_thread_data_t *tkm;
4581 ikev2_sa_t *fsa = 0;
4582 ikev2_profile_t *p = 0;
4583 ikev2_child_sa_t *fchild = 0;
4584 f64 now = vlib_time_now (vm);
4585 vlib_counter_t counts;
4587 /* Search for the SA and child SA */
4588 vec_foreach (tkm, km->per_thread_data)
4594 pool_foreach (sa, tkm->sas, ({
4595 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4604 vlib_get_combined_counter (&ipsec_sa_counters,
4605 ipsec_sa->stat_index, &counts);
4607 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4608 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4610 if (fchild && p && p->lifetime_maxdata)
4612 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4614 fchild->time_to_expiration = now;
4620 ikev2_process_pending_sa_init (ikev2_main_t * km)
4627 hash_foreach (ispi, sai, km->sa_by_ispi,
4629 sa = pool_elt_at_index (km->sais, sai);
4630 if (sa->init_response_received)
4634 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4637 vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
4638 clib_memcpy_fast (vlib_buffer_get_current (b),
4639 sa->last_sa_init_req_packet_data,
4640 vec_len (sa->last_sa_init_req_packet_data));
4641 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4642 vec_len (sa->last_sa_init_req_packet_data),
4643 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4648 static vlib_node_registration_t ikev2_mngr_process_node;
4651 ikev2_send_informational_request (ikev2_sa_t * sa)
4653 ikev2_main_t *km = &ikev2_main;
4654 ip_address_t *src, *dst;
4661 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4664 ikev2_log_error ("buffer alloc failure");
4668 ike0 = vlib_buffer_get_current (b0);
4669 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4670 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4671 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4672 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
4673 sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
4674 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4679 len = ikev2_insert_non_esp_marker (ike0, len);
4681 if (sa->is_initiator)
4692 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4693 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4697 static_always_inline int
4698 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4700 ikev2_main_t *km = &ikev2_main;
4701 vlib_main_t *vm = km->vlib_main;
4703 if (!sa->keys_generated)
4706 if (sa->liveness_retries >= km->liveness_max_retries)
4709 f64 now = vlib_time_now (vm);
4711 if (sa->liveness_period_check < now)
4713 sa->liveness_retries++;
4714 sa->liveness_period_check = now + km->liveness_period;
4715 ikev2_send_informational_request (sa);
4721 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
4724 ikev2_main_t *km = &ikev2_main;
4725 ipsec_main_t *im = &ipsec_main;
4727 ikev2_child_sa_t *c;
4733 vlib_process_wait_for_event_or_clock (vm, 1);
4734 vlib_process_get_events (vm, NULL);
4736 /* process ike child sas */
4737 ikev2_main_per_thread_data_t *tkm;
4738 vec_foreach (tkm, km->per_thread_data)
4741 u32 *to_be_deleted = 0;
4744 pool_foreach (sa, tkm->sas, ({
4745 ikev2_child_sa_t *c;
4747 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
4749 sa->old_remote_id_present = 0;
4753 sa->old_id_expiration -= 1;
4755 vec_foreach (c, sa->childs)
4757 req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
4760 if (ikev2_mngr_process_responder_sas (sa))
4761 vec_add1 (to_be_deleted, sa - tkm->sas);
4765 vec_foreach (sai, to_be_deleted)
4767 sa = pool_elt_at_index (tkm->sas, sai[0]);
4768 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
4769 vec_foreach (c, sa->childs)
4771 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
4772 ikev2_sa_del_child_sa (sa, c);
4774 ikev2_sa_free_all_vec (sa);
4775 hash_unset (tkm->sa_by_rspi, sa->rspi);
4776 pool_put (tkm->sas, sa);
4780 p = pool_elt_at_index (km->profiles, sa->profile_index);
4783 ikev2_initiate_sa_init (vm, p->name);
4787 vec_free (to_be_deleted);
4790 /* process ipsec sas */
4793 pool_foreach (sa, im->sad, ({
4794 ikev2_mngr_process_ipsec_sa(sa);
4798 ikev2_process_pending_sa_init (km);
4802 vlib_process_wait_for_event_or_clock (vm, 5);
4803 vlib_process_get_events (vm, NULL);
4812 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
4813 .function = ikev2_mngr_process_fn,
4814 .type = VLIB_NODE_TYPE_PROCESS,
4816 "ikev2-manager-process",
4819 VLIB_PLUGIN_REGISTER () = {
4820 .version = VPP_BUILD_VER,
4821 .description = "Internet Key Exchange (IKEv2) Protocol",
4826 * fd.io coding-style-patch-verification: ON
4829 * eval: (c-set-style "gnu")