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 IKEV2_GENERATE_SA_INIT_OK_str ""
65 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
66 "no DH group configured for IKE proposals!"
67 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
68 "DH group not supported!"
72 IKEV2_GENERATE_SA_INIT_OK,
73 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
74 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
75 } ikev2_generate_sa_error_t;
78 format_ikev2_gen_sa_error (u8 * s, va_list * args)
80 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
83 case IKEV2_GENERATE_SA_INIT_OK:
85 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
86 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
88 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
89 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
95 #define foreach_ikev2_error \
96 _(PROCESSED, "IKEv2 packets processed") \
97 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
98 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
99 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
100 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
101 _(NOT_IKEV2, "Non IKEv2 packets received") \
102 _(BAD_LENGTH, "Bad packet length") \
103 _(MALFORMED_PACKET, "Malformed packet") \
104 _(NO_BUFF_SPACE, "No buffer space")
108 #define _(sym,str) IKEV2_ERROR_##sym,
114 static char *ikev2_error_strings[] = {
115 #define _(sym,string) string,
122 IKEV2_NEXT_IP4_LOOKUP,
123 IKEV2_NEXT_IP4_ERROR_DROP,
129 IKEV2_NEXT_IP6_LOOKUP,
130 IKEV2_NEXT_IP6_ERROR_DROP,
134 typedef u32 ikev2_non_esp_marker;
136 static_always_inline u16
137 ikev2_get_port (ikev2_sa_t * sa)
139 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
142 static_always_inline int
143 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
145 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
146 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
147 return len + sizeof (ikev2_non_esp_marker);
150 static ikev2_sa_transform_t *
151 ikev2_find_transform_data (ikev2_sa_transform_t * t)
153 ikev2_main_t *km = &ikev2_main;
154 ikev2_sa_transform_t *td;
156 vec_foreach (td, km->supported_transforms)
158 if (td->type != t->type)
161 if (td->transform_id != t->transform_id)
164 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
166 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
167 || t->attrs[1] != 14)
170 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
178 static ikev2_sa_proposal_t *
179 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
180 ikev2_protocol_id_t prot_id)
182 ikev2_sa_proposal_t *rv = 0;
183 ikev2_sa_proposal_t *proposal;
184 ikev2_sa_transform_t *transform, *new_t;
185 u8 mandatory_bitmap, optional_bitmap;
187 if (prot_id == IKEV2_PROTOCOL_IKE)
189 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
190 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
191 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
193 else if (prot_id == IKEV2_PROTOCOL_ESP)
195 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
196 (1 << IKEV2_TRANSFORM_TYPE_ESN);
197 optional_bitmap = mandatory_bitmap |
198 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
200 else if (prot_id == IKEV2_PROTOCOL_AH)
202 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
203 (1 << IKEV2_TRANSFORM_TYPE_ESN);
204 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
209 vec_add2 (rv, proposal, 1);
211 vec_foreach (proposal, proposals)
214 if (proposal->protocol_id != prot_id)
217 vec_foreach (transform, proposal->transforms)
219 if ((1 << transform->type) & bitmap)
222 if (ikev2_find_transform_data (transform))
224 bitmap |= 1 << transform->type;
225 vec_add2 (rv->transforms, new_t, 1);
226 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
227 new_t->attrs = vec_dup (transform->attrs);
231 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
232 (bitmap & ~optional_bitmap) == 0)
234 rv->proposal_num = proposal->proposal_num;
235 rv->protocol_id = proposal->protocol_id;
236 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
241 vec_free (rv->transforms);
250 ikev2_sa_transform_t *
251 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
252 ikev2_transform_type_t type)
254 ikev2_sa_transform_t *t;
259 vec_foreach (t, p->transforms)
262 return ikev2_find_transform_data (t);
268 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
272 vec_foreach (c, sa->childs)
274 ikev2_sa_proposal_t *proposal =
275 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
276 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
284 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
286 ikev2_sa_proposal_t *p;
287 ikev2_sa_transform_t *t;
294 vec_foreach (t, p->transforms)
298 vec_free (p->transforms);
304 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
306 ikev2_sa_free_proposal_vector (&c->r_proposals);
307 ikev2_sa_free_proposal_vector (&c->i_proposals);
317 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
320 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
326 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
328 ikev2_sa_free_child_sa (child);
329 vec_del1 (sa->childs, child - sa->childs);
333 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
335 vec_free (sa->i_nonce);
336 vec_free (sa->r_nonce);
338 vec_free (sa->dh_shared_key);
339 vec_free (sa->dh_private_key);
340 vec_free (sa->i_dh_data);
341 vec_free (sa->r_dh_data);
343 ikev2_sa_free_proposal_vector (&sa->r_proposals);
344 ikev2_sa_free_proposal_vector (&sa->i_proposals);
347 vec_free (sa->sk_ai);
348 vec_free (sa->sk_ar);
349 vec_free (sa->sk_ei);
350 vec_free (sa->sk_er);
351 vec_free (sa->sk_pi);
352 vec_free (sa->sk_pr);
354 vec_free (sa->i_id.data);
355 vec_free (sa->r_id.data);
357 vec_free (sa->i_auth.data);
359 EVP_PKEY_free (sa->i_auth.key);
360 vec_free (sa->r_auth.data);
362 EVP_PKEY_free (sa->r_auth.key);
366 vec_free (sa->rekey);
368 vec_free (sa->last_sa_init_req_packet_data);
369 vec_free (sa->last_sa_init_res_packet_data);
371 vec_free (sa->last_res_packet_data);
373 ikev2_sa_free_all_child_sa (&sa->childs);
377 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
381 ikev2_sa_free_all_vec (sa);
383 p = hash_get (ptd->sa_by_rspi, sa->rspi);
386 hash_unset (ptd->sa_by_rspi, sa->rspi);
387 pool_put (ptd->sas, sa);
391 static ikev2_generate_sa_error_t
392 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
394 ikev2_sa_transform_t *t = 0, *t2;
395 ikev2_main_t *km = &ikev2_main;
397 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
398 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
400 /* check if received DH group is on our list of supported groups */
401 vec_foreach (t2, km->supported_transforms)
403 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
412 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
413 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
416 if (sa->is_initiator)
419 RAND_bytes ((u8 *) & sa->ispi, 8);
422 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
423 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
428 RAND_bytes ((u8 *) & sa->rspi, 8);
431 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
432 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
435 /* generate dh keys */
436 ikev2_generate_dh (sa, t);
438 return IKEV2_GENERATE_SA_INIT_OK;
442 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
444 ikev2_sa_transform_t *t = 0, *t2;
445 ikev2_main_t *km = &ikev2_main;
447 /*move some data to the new SA */
448 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
449 sa->i_nonce = _(sai->i_nonce);
450 sa->i_dh_data = _(sai->i_dh_data);
451 sa->dh_private_key = _(sai->dh_private_key);
452 ip_address_copy (&sa->iaddr, &sai->iaddr);
453 ip_address_copy (&sa->raddr, &sai->raddr);
454 sa->is_initiator = sai->is_initiator;
455 sa->i_id.type = sai->i_id.type;
456 sa->r_id.type = sai->r_id.type;
457 sa->profile_index = sai->profile_index;
458 sa->tun_itf = sai->tun_itf;
459 sa->is_tun_itf_set = sai->is_tun_itf_set;
460 sa->natt_state = sai->natt_state;
461 sa->i_id.data = _(sai->i_id.data);
462 sa->r_id.data = _(sai->r_id.data);
463 sa->i_auth.method = sai->i_auth.method;
464 sa->i_auth.hex = sai->i_auth.hex;
465 sa->i_auth.data = _(sai->i_auth.data);
466 sa->i_auth.key = _(sai->i_auth.key);
467 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
468 sa->last_init_msg_id = sai->last_init_msg_id;
469 sa->childs = _(sai->childs);
470 sa->udp_encap = sai->udp_encap;
471 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
472 sa->dst_port = sai->dst_port;
473 sa->sw_if_index = sai->sw_if_index;
477 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
482 /* check if received DH group is on our list of supported groups */
483 vec_foreach (t2, km->supported_transforms)
485 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
494 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
499 /* generate dh keys */
500 ikev2_complete_dh (sa, t);
505 ikev2_calc_keys (ikev2_sa_t * sa)
508 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
511 u16 integ_key_len = 0, salt_len = 0;
512 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
514 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
516 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
518 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
521 integ_key_len = tr_integ->key_len;
523 salt_len = sizeof (u32);
525 vec_append (s, sa->i_nonce);
526 vec_append (s, sa->r_nonce);
527 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
529 /* Calculate S = Ni | Nr | SPIi | SPIr */
531 vec_add2 (s, tmp, 2 * sizeof (*spi));
533 spi[0] = clib_host_to_net_u64 (sa->ispi);
534 spi[1] = clib_host_to_net_u64 (sa->rspi);
536 /* calculate PRFplus */
538 int len = tr_prf->key_trunc + /* SK_d */
539 integ_key_len * 2 + /* SK_ai, SK_ar */
540 tr_encr->key_len * 2 + /* SK_ei, SK_er */
541 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
544 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
551 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
552 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
553 pos += tr_prf->key_trunc;
558 sa->sk_ai = vec_new (u8, integ_key_len);
559 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
560 pos += integ_key_len;
563 sa->sk_ar = vec_new (u8, integ_key_len);
564 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
565 pos += integ_key_len;
569 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
570 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
571 pos += tr_encr->key_len + salt_len;
574 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
575 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
576 pos += tr_encr->key_len + salt_len;
579 sa->sk_pi = vec_new (u8, tr_prf->key_len);
580 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
581 pos += tr_prf->key_len;
584 sa->sk_pr = vec_new (u8, tr_prf->key_len);
585 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
586 pos += tr_prf->key_len;
589 sa->keys_generated = 1;
593 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
596 u16 integ_key_len = 0;
599 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
601 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
603 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
605 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
608 integ_key_len = ctr_integ->key_len;
610 salt_len = sizeof (u32);
612 vec_append (s, sa->i_nonce);
613 vec_append (s, sa->r_nonce);
614 /* calculate PRFplus */
616 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
618 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
623 child->sk_ei = vec_new (u8, ctr_encr->key_len);
624 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
625 pos += ctr_encr->key_len;
630 child->sk_ai = vec_new (u8, ctr_integ->key_len);
631 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
632 pos += ctr_integ->key_len;
636 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
641 child->sk_er = vec_new (u8, ctr_encr->key_len);
642 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
643 pos += ctr_encr->key_len;
648 child->sk_ar = vec_new (u8, integ_key_len);
649 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
650 pos += integ_key_len;
654 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
663 static_always_inline u8 *
664 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
666 const u32 max_buf_size =
667 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
668 u8 buf[max_buf_size];
669 u8 *res = vec_new (u8, 20);
671 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
672 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
673 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
674 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
675 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
680 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
683 const ike_ke_payload_header_t *ke = p;
684 u16 plen = clib_net_to_host_u16 (ke->length);
685 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
686 if (sizeof (*ke) > rlen)
689 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
690 vec_reset_length (ke_data[0]);
691 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
696 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
698 const ike_payload_header_t *ikep = p;
699 u16 plen = clib_net_to_host_u16 (ikep->length);
700 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
701 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
706 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
709 if (sizeof (*ikep) > rlen)
711 *plen = clib_net_to_host_u16 (ikep->length);
712 if (*plen < sizeof (*ikep) || *plen > rlen)
718 ikev2_process_sa_init_req (vlib_main_t * vm,
719 ikev2_sa_t * sa, ike_header_t * ike,
720 udp_header_t * udp, u32 len)
722 u8 nonce[IKEV2_NONCE_SIZE];
724 u8 payload = ike->nextpayload;
725 ike_payload_header_t *ikep;
728 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
729 "from ", clib_net_to_host_u64 (ike->ispi),
730 clib_net_to_host_u64 (ike->rspi),
731 ip_addr_v4 (&sa->iaddr).as_u32,
732 ip_addr_version (&sa->iaddr) == AF_IP4);
734 sa->ispi = clib_net_to_host_u64 (ike->ispi);
736 /* store whole IKE payload - needed for PSK auth */
737 vec_reset_length (sa->last_sa_init_req_packet_data);
738 vec_add (sa->last_sa_init_req_packet_data, ike, len);
740 if (len < sizeof (*ike))
743 len -= sizeof (*ike);
744 while (p < len && payload != IKEV2_PAYLOAD_NONE)
746 ikep = (ike_payload_header_t *) & ike->payload[p];
747 int current_length = len - p;
748 if (!ikev2_check_payload_length (ikep, current_length, &plen))
751 if (payload == IKEV2_PAYLOAD_SA)
753 ikev2_sa_free_proposal_vector (&sa->i_proposals);
754 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
756 else if (payload == IKEV2_PAYLOAD_KE)
758 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
762 else if (payload == IKEV2_PAYLOAD_NONCE)
764 vec_reset_length (sa->i_nonce);
765 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
766 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
768 else if (payload == IKEV2_PAYLOAD_NOTIFY)
771 ikev2_parse_notify_payload (ikep, current_length);
772 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
774 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
776 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
778 if (sa->natt_state == IKEV2_NATT_ENABLED)
779 sa->natt_state = IKEV2_NATT_ACTIVE;
780 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
781 " behind NAT", sa->ispi);
785 else if (n->msg_type ==
786 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
788 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
790 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
792 if (sa->natt_state == IKEV2_NATT_ENABLED)
793 sa->natt_state = IKEV2_NATT_ACTIVE;
794 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
795 " (self) behind NAT", sa->ispi);
801 else if (payload == IKEV2_PAYLOAD_VENDOR)
803 ikev2_parse_vendor_payload (ikep);
807 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
809 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
811 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
812 sa->unsupported_cp = payload;
817 payload = ikep->nextpayload;
821 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
826 ikev2_process_sa_init_resp (vlib_main_t * vm,
827 ikev2_sa_t * sa, ike_header_t * ike,
828 udp_header_t * udp, u32 len)
830 u8 nonce[IKEV2_NONCE_SIZE];
832 u8 payload = ike->nextpayload;
833 ike_payload_header_t *ikep;
836 sa->ispi = clib_net_to_host_u64 (ike->ispi);
837 sa->rspi = clib_net_to_host_u64 (ike->rspi);
839 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
840 "from ", sa->ispi, sa->rspi,
841 ip_addr_v4 (&sa->raddr).as_u32,
842 ip_addr_version (&sa->raddr) == AF_IP4);
844 /* store whole IKE payload - needed for PSK auth */
845 vec_reset_length (sa->last_sa_init_res_packet_data);
846 vec_add (sa->last_sa_init_res_packet_data, ike, len);
848 if (sizeof (*ike) > len)
851 len -= sizeof (*ike);
852 while (p < len && payload != IKEV2_PAYLOAD_NONE)
854 int current_length = len - p;
855 ikep = (ike_payload_header_t *) & ike->payload[p];
856 if (!ikev2_check_payload_length (ikep, current_length, &plen))
859 if (payload == IKEV2_PAYLOAD_SA)
861 ikev2_sa_free_proposal_vector (&sa->r_proposals);
862 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
865 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
867 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
870 else if (payload == IKEV2_PAYLOAD_KE)
872 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
876 else if (payload == IKEV2_PAYLOAD_NONCE)
878 vec_reset_length (sa->r_nonce);
879 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
880 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
882 else if (payload == IKEV2_PAYLOAD_NOTIFY)
885 ikev2_parse_notify_payload (ikep, current_length);
886 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
888 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
891 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
893 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
894 " behind NAT, unsupported", sa->ispi);
898 else if (n->msg_type ==
899 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
901 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
904 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
906 if (sa->natt_state == IKEV2_NATT_ENABLED)
907 sa->natt_state = IKEV2_NATT_ACTIVE;
908 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
909 " (self) behind NAT", sa->ispi);
915 else if (payload == IKEV2_PAYLOAD_VENDOR)
917 ikev2_parse_vendor_payload (ikep);
921 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
923 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
925 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
926 sa->unsupported_cp = payload;
931 payload = ikep->nextpayload;
937 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
938 u8 * payload, u32 rlen, u32 * out_len)
940 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
942 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
943 ike_payload_header_t *ikep = 0;
946 ikev2_sa_transform_t *tr_integ;
947 ikev2_sa_transform_t *tr_encr;
949 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
951 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
952 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
954 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
957 if (rlen <= sizeof (*ike))
960 int len = rlen - sizeof (*ike);
962 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
964 ikep = (ike_payload_header_t *) & ike->payload[p];
965 int current_length = len - p;
966 if (!ikev2_check_payload_length (ikep, current_length, &plen))
969 if (*payload == IKEV2_PAYLOAD_SK)
971 last_payload = *payload;
975 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
977 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
979 sa->unsupported_cp = *payload;
984 *payload = ikep->nextpayload;
988 if (last_payload != IKEV2_PAYLOAD_SK)
990 ikev2_elog_error ("Last payload must be SK");
996 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
999 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
1000 u8 *aad = (u8 *) ike;
1001 u32 aad_len = ikep->payload - aad;
1002 u8 *tag = ikep->payload + plen;
1004 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
1005 plen, aad, aad_len, tag, &dlen);
1009 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
1014 if (rlen < tr_integ->key_trunc)
1018 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1019 (u8 *) ike, rlen - tr_integ->key_trunc);
1021 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1024 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1026 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1028 ikev2_elog_error ("message integrity check failed");
1034 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1039 plaintext = ikep->payload + tr_encr->block_size;
1046 static_always_inline int
1047 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1049 if (i1->type != i2->type)
1052 if (vec_len (i1->data) != vec_len (i2->data))
1055 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1062 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1065 ikev2_main_t *km = &ikev2_main;
1068 ikev2_child_sa_t *c;
1070 /* find old IKE SAs with the same authenticated identity */
1072 pool_foreach (tmp, ptd->sas, ({
1073 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1074 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1077 if (sa->rspi != tmp->rspi)
1078 vec_add1(delete, tmp - ptd->sas);
1082 for (i = 0; i < vec_len (delete); i++)
1084 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1085 vec_foreach (c, tmp->childs)
1087 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1089 ikev2_delete_sa (ptd, tmp);
1093 sa->initial_contact = 0;
1097 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1100 ikev2_main_t *km = &ikev2_main;
1102 if (!sa->initial_contact)
1107 ikev2_initial_contact_cleanup_internal (ptd, sa);
1111 vec_foreach (ptd, km->per_thread_data)
1112 ikev2_initial_contact_cleanup_internal (ptd, sa);
1114 sa->initial_contact = 0;
1118 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1120 const ike_id_payload_header_t *id = p;
1121 u16 plen = clib_net_to_host_u16 (id->length);
1122 if (plen < sizeof (*id) || plen > rlen)
1125 sa_id->type = id->id_type;
1126 vec_reset_length (sa_id->data);
1127 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1133 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1135 const ike_auth_payload_header_t *ah = p;
1136 u16 plen = clib_net_to_host_u16 (ah->length);
1138 a->method = ah->auth_method;
1139 vec_reset_length (a->data);
1140 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1145 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1146 ike_header_t * ike, u32 len)
1149 ikev2_child_sa_t *first_child_sa;
1150 u8 payload = ike->nextpayload;
1152 ike_payload_header_t *ikep;
1156 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1157 "from ", clib_host_to_net_u64 (ike->ispi),
1158 clib_host_to_net_u64 (ike->rspi),
1160 ip_addr_v4 (&sa->raddr).as_u32 :
1161 ip_addr_v4 (&sa->iaddr).as_u32,
1162 ip_addr_version (&sa->raddr) == AF_IP4);
1164 ikev2_calc_keys (sa);
1166 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1170 if (sa->unsupported_cp)
1172 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1178 /* select or create 1st child SA */
1179 if (sa->is_initiator)
1181 first_child_sa = &sa->childs[0];
1185 ikev2_sa_free_all_child_sa (&sa->childs);
1186 vec_add2 (sa->childs, first_child_sa, 1);
1190 /* process encrypted payload */
1191 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1193 ikep = (ike_payload_header_t *) & plaintext[p];
1194 int current_length = dlen - p;
1195 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1198 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1200 if (sa->is_initiator)
1202 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1203 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1208 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1209 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1213 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1215 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1218 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1220 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1223 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1225 if (sa->is_initiator)
1227 if (!ikev2_parse_auth_payload (ikep, current_length,
1233 if (!ikev2_parse_auth_payload (ikep, current_length,
1238 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1241 ikev2_parse_notify_payload (ikep, current_length);
1242 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1244 sa->initial_contact = 1;
1248 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1250 ikev2_parse_vendor_payload (ikep);
1252 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1254 vec_free (first_child_sa->tsi);
1255 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1257 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1259 vec_free (first_child_sa->tsr);
1260 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1264 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1267 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1269 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1270 sa->unsupported_cp = payload;
1275 payload = ikep->nextpayload;
1282 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1287 ikev2_process_informational_req (vlib_main_t * vm,
1288 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1291 u8 payload = ike->nextpayload;
1293 ike_payload_header_t *ikep;
1295 ikev2_notify_t *n = 0;
1297 sa->liveness_retries = 0;
1298 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1299 "from ", clib_host_to_net_u64 (ike->ispi),
1300 clib_host_to_net_u64 (ike->rspi),
1301 ip_addr_v4 (&sa->iaddr).as_u32,
1302 ip_addr_version (&sa->iaddr) == AF_IP4);
1304 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1309 /* process encrypted payload */
1311 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1313 u32 current_length = dlen - p;
1314 if (p + sizeof (*ikep) > dlen)
1317 ikep = (ike_payload_header_t *) & plaintext[p];
1318 u16 plen = clib_net_to_host_u16 (ikep->length);
1320 if (plen < sizeof (*ikep) || plen > current_length)
1323 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1325 n = ikev2_parse_notify_payload (ikep, current_length);
1328 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1329 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1332 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1334 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1336 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1338 ikev2_parse_vendor_payload (ikep);
1342 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1344 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1346 sa->unsupported_cp = payload;
1350 payload = ikep->nextpayload;
1357 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1358 ikev2_sa_t * sa, ike_header_t * ike,
1362 u8 payload = ike->nextpayload;
1365 u8 nonce[IKEV2_NONCE_SIZE];
1367 ike_payload_header_t *ikep;
1368 ikev2_notify_t *n = 0;
1369 ikev2_ts_t *tsi = 0;
1370 ikev2_ts_t *tsr = 0;
1371 ikev2_sa_proposal_t *proposal = 0;
1372 ikev2_child_sa_t *child_sa;
1376 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1377 "from ", clib_host_to_net_u64 (ike->ispi),
1378 clib_host_to_net_u64 (ike->rspi),
1379 ip_addr_v4 (&sa->raddr).as_u32,
1380 ip_addr_version (&sa->raddr) == AF_IP4);
1382 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1385 goto cleanup_and_exit;
1387 /* process encrypted payload */
1389 while (payload != IKEV2_PAYLOAD_NONE)
1391 ikep = (ike_payload_header_t *) & plaintext[p];
1392 int current_length = dlen - p;
1393 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1394 goto cleanup_and_exit;
1396 if (payload == IKEV2_PAYLOAD_SA)
1398 proposal = ikev2_parse_sa_payload (ikep, current_length);
1400 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1402 n = ikev2_parse_notify_payload (ikep, current_length);
1403 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1408 else if (payload == IKEV2_PAYLOAD_DELETE)
1410 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1412 else if (payload == IKEV2_PAYLOAD_VENDOR)
1414 ikev2_parse_vendor_payload (ikep);
1416 else if (payload == IKEV2_PAYLOAD_NONCE)
1418 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1420 else if (payload == IKEV2_PAYLOAD_TSI)
1422 tsi = ikev2_parse_ts_payload (ikep, current_length);
1424 else if (payload == IKEV2_PAYLOAD_TSR)
1426 tsr = ikev2_parse_ts_payload (ikep, current_length);
1430 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1432 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1434 sa->unsupported_cp = payload;
1435 goto cleanup_and_exit;
1438 payload = ikep->nextpayload;
1442 if (sa->is_initiator && proposal
1443 && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1445 ikev2_rekey_t *rekey = sa->rekey;
1446 if (vec_len (rekey) == 0)
1447 goto cleanup_and_exit;
1448 rekey->protocol_id = proposal->protocol_id;
1450 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1451 rekey->i_proposal->spi = rekey->spi;
1452 rekey->r_proposal = proposal;
1456 vec_reset_length (sa->r_nonce);
1457 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1458 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1461 child_sa->rekey_retries = 0;
1466 ikev2_rekey_t *rekey;
1467 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1470 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1472 goto cleanup_and_exit;
1474 vec_add2 (sa->rekey, rekey, 1);
1475 rekey->protocol_id = n->protocol_id;
1476 rekey->spi = n->spi;
1477 rekey->i_proposal = proposal;
1479 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1483 vec_reset_length (sa->i_nonce);
1484 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1485 /* generate new Nr */
1486 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1487 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1490 goto cleanup_and_exit;
1496 vec_free (proposal);
1503 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1511 ikev2_sa_transform_t *tr_prf;
1514 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1520 nonce = sa->i_nonce;
1521 packet_data = sa->last_sa_init_res_packet_data;
1527 nonce = sa->r_nonce;
1528 packet_data = sa->last_sa_init_req_packet_data;
1531 data = vec_new (u8, 4);
1533 vec_append (data, id->data);
1535 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1536 vec_append (authmsg, packet_data);
1537 vec_append (authmsg, nonce);
1538 vec_append (authmsg, id_hash);
1546 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1548 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1549 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1550 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1551 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1558 ikev2_sa_match_ts (ikev2_sa_t * sa)
1560 ikev2_main_t *km = &ikev2_main;
1562 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1563 ikev2_id_t *id_rem, *id_loc;
1566 pool_foreach (p, km->profiles, ({
1568 if (sa->is_initiator)
1584 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1585 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1588 sa->profile_index = p - km->profiles;
1590 vec_foreach(ts, sa->childs[0].tsi)
1592 if (ikev2_ts_cmp(p_tsi, ts))
1594 vec_add1 (tsi, ts[0]);
1599 vec_foreach(ts, sa->childs[0].tsr)
1601 if (ikev2_ts_cmp(p_tsr, ts))
1603 vec_add1 (tsr, ts[0]);
1614 vec_free (sa->childs[0].tsi);
1615 vec_free (sa->childs[0].tsr);
1616 sa->childs[0].tsi = tsi;
1617 sa->childs[0].tsr = tsr;
1623 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1628 ikev2_sa_auth (ikev2_sa_t * sa)
1630 ikev2_main_t *km = &ikev2_main;
1631 ikev2_profile_t *p, *sel_p = 0;
1632 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1633 ikev2_sa_transform_t *tr_prf;
1636 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1638 /* only shared key and rsa signature */
1639 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1640 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1642 ikev2_elog_uint (IKEV2_LOG_ERROR,
1643 "unsupported authentication method %u",
1645 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1649 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1650 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1652 ikev2_id_t *id_rem, *id_loc;
1653 ikev2_auth_t *sa_auth;
1655 if (sa->is_initiator)
1659 sa_auth = &sa->r_auth;
1665 sa_auth = &sa->i_auth;
1669 pool_foreach (p, km->profiles, ({
1672 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1673 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1676 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1678 if (!p->auth.data ||
1679 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1682 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1683 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1685 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1687 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1694 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1696 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1699 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1701 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1714 sa->udp_encap = sel_p->udp_encap;
1715 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1719 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1721 if (!sa->is_initiator)
1723 vec_free (sa->r_id.data);
1724 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1725 sa->r_id.type = sel_p->loc_id.type;
1726 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1727 sa->i_id.type = sel_p->rem_id.type;
1729 /* generate our auth data */
1730 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1731 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1733 vec_free (sa->r_auth.data);
1734 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1735 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1737 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1739 vec_free (sa->r_auth.data);
1740 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1741 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1745 /* select transforms for 1st child sa */
1746 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1747 sa->childs[0].r_proposals =
1748 ikev2_select_proposal (sa->childs[0].i_proposals,
1749 IKEV2_PROTOCOL_ESP);
1751 if (~0 != sel_p->tun_itf)
1753 sa->is_tun_itf_set = 1;
1754 sa->tun_itf = sel_p->tun_itf;
1760 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1761 "profile found! ispi %lx", sa->ispi);
1762 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1770 ikev2_sa_auth_init (ikev2_sa_t * sa)
1772 ikev2_main_t *km = &ikev2_main;
1773 u8 *authmsg, *key_pad, *psk = 0;
1774 ikev2_sa_transform_t *tr_prf;
1777 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1779 /* only shared key and rsa signature */
1780 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1781 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1783 ikev2_elog_uint (IKEV2_LOG_ERROR,
1784 "unsupported authentication method %u",
1786 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1790 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1791 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1792 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1794 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1796 vec_free (sa->i_auth.data);
1797 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1798 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1800 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1802 vec_free (sa->i_auth.data);
1803 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1804 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1813 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1815 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1819 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1821 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1831 ipsec_sa_flags_t flags;
1834 ipsec_crypto_alg_t encr_type;
1835 ipsec_integ_alg_t integ_type;
1836 ip46_address_t local_ip;
1837 ip46_address_t remote_ip;
1838 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1840 u32 old_remote_sa_id;
1841 u16 ipsec_over_udp_port;
1844 } ikev2_add_ipsec_tunnel_args_t;
1847 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1849 ikev2_main_t *km = &ikev2_main;
1853 if (~0 == a->sw_if_index)
1855 /* no tunnel associated with the SA/profile - create a new one */
1856 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1857 &a->local_ip, &a->remote_ip, 0,
1858 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1859 TUNNEL_MODE_P2P, &sw_if_index);
1861 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1863 if (hash_get (km->sw_if_indices, sw_if_index))
1864 /* interface is managed by IKE; proceed with updating SAs */
1867 hash_set1 (km->sw_if_indices, sw_if_index);
1871 sw_if_index = a->sw_if_index;
1872 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1877 ikev2_elog_uint (IKEV2_LOG_ERROR,
1878 "installing ipip tunnel failed! local spi: %x",
1884 vec_add1 (sas_in, a->remote_sa_id);
1887 ipsec_tun_protect_del (sw_if_index, NULL);
1889 /* replace local SA immediately */
1890 ipsec_sa_unlock_id (a->local_sa_id);
1892 /* keep the old sa */
1893 vec_add1 (sas_in, a->old_remote_sa_id);
1896 rv = ipsec_sa_add_and_lock (a->local_sa_id,
1898 IPSEC_PROTOCOL_ESP, a->encr_type,
1899 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1900 a->flags, 0, a->salt_local, &a->local_ip,
1901 &a->remote_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1902 IP_DSCP_CS0, NULL, a->src_port, a->dst_port);
1906 rv = ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1907 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1908 a->integ_type, &a->rem_ikey,
1909 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1910 a->salt_remote, &a->remote_ip,
1911 &a->local_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1913 a->ipsec_over_udp_port, a->ipsec_over_udp_port);
1917 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1924 ipsec_sa_unlock_id (a->remote_sa_id);
1926 ipsec_sa_unlock_id (a->local_sa_id);
1932 ikev2_create_tunnel_interface (vlib_main_t * vm,
1934 ikev2_child_sa_t * child, u32 sa_index,
1935 u32 child_index, u8 is_rekey)
1937 u32 thread_index = vlib_get_thread_index ();
1938 ikev2_main_t *km = &ikev2_main;
1939 ipsec_crypto_alg_t encr_type;
1940 ipsec_integ_alg_t integ_type;
1941 ikev2_profile_t *p = 0;
1942 ikev2_sa_transform_t *tr;
1943 ikev2_sa_proposal_t *proposals;
1945 ikev2_add_ipsec_tunnel_args_t a;
1947 clib_memset (&a, 0, sizeof (a));
1949 if (!child->r_proposals)
1951 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1955 if (sa->is_initiator)
1957 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1958 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1959 proposals = child->r_proposals;
1960 a.local_spi = child->r_proposals[0].spi;
1961 a.remote_spi = child->i_proposals[0].spi;
1965 ip_address_to_46 (&sa->raddr, &a.local_ip);
1966 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1967 proposals = child->i_proposals;
1968 a.local_spi = child->i_proposals[0].spi;
1969 a.remote_spi = child->r_proposals[0].spi;
1972 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1975 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1976 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1978 if (ikev2_natt_active (sa))
1979 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1980 a.is_rekey = is_rekey;
1982 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1983 if (tr && tr->esn_type)
1984 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1986 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1989 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1991 switch (tr->key_len)
1994 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1997 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2000 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2003 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2008 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2011 switch (tr->key_len)
2014 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2017 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2020 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2023 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2031 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2037 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2040 a.encr_type = encr_type;
2044 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2047 switch (tr->integ_type)
2049 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2050 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2052 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2053 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2055 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2056 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2058 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2059 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2062 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2068 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2074 integ_type = IPSEC_INTEG_ALG_NONE;
2077 a.integ_type = integ_type;
2078 ikev2_calc_child_keys (sa, child);
2080 if (sa->is_initiator)
2082 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2083 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2084 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2085 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2088 a.salt_remote = child->salt_er;
2089 a.salt_local = child->salt_ei;
2091 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2095 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2096 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2097 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2098 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2101 a.salt_remote = child->salt_ei;
2102 a.salt_local = child->salt_er;
2105 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2106 a.src_port = sa->ipsec_over_udp_port;
2109 if (sa->is_initiator && sa->profile_index != ~0)
2110 p = pool_elt_at_index (km->profiles, sa->profile_index);
2112 if (p && p->lifetime)
2114 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2115 if (p->lifetime_jitter)
2117 // This is not much better than rand(3), which Coverity warns
2118 // is unsuitable for security applications; random_u32 is
2119 // however fast. If this perturbance to the expiration time
2120 // needs to use a better RNG then we may need to use something
2121 // like /dev/urandom which has significant overhead.
2122 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2123 rnd = random_u32 (&rnd);
2125 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2129 if (thread_index & 0xffffffc0)
2130 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2132 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2133 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2135 child->local_sa_id =
2137 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2139 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2144 /* create a new remote SA ID to keep the old SA for a bit longer
2145 * so the peer has some time to swap their SAs */
2147 /* use most significat bit of child index part in id */
2149 if (sa->current_remote_id_mask)
2151 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2152 sa->current_remote_id_mask = 0;
2156 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2157 sa->current_remote_id_mask = mask;
2158 remote_sa_id |= mask;
2160 sa->old_id_expiration = 3.0;
2161 sa->old_remote_id_present = 1;
2164 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2166 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2167 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2169 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2170 (u8 *) & a, sizeof (a));
2176 ip46_address_t local_ip;
2177 ip46_address_t remote_ip;
2181 } ikev2_del_ipsec_tunnel_args_t;
2183 static_always_inline u32
2184 ikev2_flip_alternate_sa_bit (u32 id)
2193 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2195 ikev2_main_t *km = &ikev2_main;
2196 ipip_tunnel_t *ipip = NULL;
2199 if (~0 == a->sw_if_index)
2202 ipip_tunnel_key_t key = {
2204 .dst = a->remote_ip,
2205 .transport = IPIP_TRANSPORT_IP4,
2210 ipip = ipip_tunnel_db_find (&key);
2214 sw_if_index = ipip->sw_if_index;
2215 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2222 sw_if_index = a->sw_if_index;
2223 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2226 if (~0 != sw_if_index)
2227 ipsec_tun_protect_del (sw_if_index, NULL);
2229 ipsec_sa_unlock_id (a->remote_sa_id);
2230 ipsec_sa_unlock_id (a->local_sa_id);
2231 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2234 ipip_del_tunnel (ipip->sw_if_index);
2238 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2239 ikev2_child_sa_t * child)
2241 ikev2_del_ipsec_tunnel_args_t a;
2243 clib_memset (&a, 0, sizeof (a));
2245 if (sa->is_initiator)
2247 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2248 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2252 ip_address_to_46 (&sa->raddr, &a.local_ip);
2253 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2256 a.remote_sa_id = child->remote_sa_id;
2257 a.local_sa_id = child->local_sa_id;
2258 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2260 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2266 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2267 ike_header_t * ike, void *user, udp_header_t * udp)
2269 ikev2_main_t *km = &ikev2_main;
2270 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2272 ike_payload_header_t *ph;
2276 ikev2_sa_transform_t *tr_encr, *tr_integ;
2278 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2280 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2282 ikev2_payload_chain_t *chain = 0;
2283 ikev2_payload_new_chain (chain);
2285 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2287 if (sa->r_proposals == 0)
2289 ikev2_payload_add_notify (chain,
2290 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2291 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2293 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2295 u8 *data = vec_new (u8, 2);
2296 ikev2_sa_transform_t *tr_dh;
2298 ikev2_sa_get_td_for_type (sa->r_proposals,
2299 IKEV2_TRANSFORM_TYPE_DH);
2300 ASSERT (tr_dh && tr_dh->dh_type);
2302 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2303 data[1] = (tr_dh->dh_type) & 0xff;
2305 ikev2_payload_add_notify (chain,
2306 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2309 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2311 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2313 u8 *data = vec_new (u8, 1);
2315 data[0] = sa->unsupported_cp;
2316 ikev2_payload_add_notify (chain,
2317 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2325 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2326 ikev2_payload_add_sa (chain, sa->r_proposals);
2327 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2328 ikev2_payload_add_nonce (chain, sa->r_nonce);
2330 u8 *nat_detection_sha1 =
2331 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2332 clib_host_to_net_u64 (sa->rspi),
2333 &sa->raddr, udp->dst_port);
2334 ikev2_payload_add_notify (chain,
2335 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2336 nat_detection_sha1);
2337 vec_free (nat_detection_sha1);
2338 nat_detection_sha1 =
2339 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2340 clib_host_to_net_u64 (sa->rspi),
2341 &sa->iaddr, udp->src_port);
2342 ikev2_payload_add_notify (chain,
2343 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2344 nat_detection_sha1);
2345 vec_free (nat_detection_sha1);
2348 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2350 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2352 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2353 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2354 ikev2_payload_add_auth (chain, &sa->r_auth);
2355 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2356 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2357 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2359 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2361 ikev2_payload_add_notify (chain,
2362 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2364 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2366 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2368 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2370 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2371 ikev2_payload_add_auth (chain, &sa->r_auth);
2373 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2375 ikev2_payload_add_notify (chain,
2376 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2377 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2378 ikev2_payload_add_auth (chain, &sa->r_auth);
2379 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2380 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2382 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2384 u8 *data = vec_new (u8, 1);
2386 data[0] = sa->unsupported_cp;
2387 ikev2_payload_add_notify (chain,
2388 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2392 else if (sa->state == IKEV2_STATE_SA_INIT)
2394 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2395 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2396 ikev2_payload_add_auth (chain, &sa->i_auth);
2397 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2398 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2399 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2400 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2405 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2409 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2411 /* if pending delete */
2414 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2416 if (ike_hdr_is_request (ike))
2417 ikev2_payload_add_delete (chain, sa->del);
2419 /* The response to a request that deletes the IKE SA is an empty
2420 INFORMATIONAL response. */
2421 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2423 /* The response to a request that deletes ESP or AH SAs will contain
2424 delete payloads for the paired SAs going in the other direction. */
2427 ikev2_payload_add_delete (chain, sa->del);
2432 /* received N(AUTHENTICATION_FAILED) */
2433 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2435 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2438 /* received unsupported critical payload */
2439 else if (sa->unsupported_cp)
2441 u8 *data = vec_new (u8, 1);
2443 data[0] = sa->unsupported_cp;
2444 ikev2_payload_add_notify (chain,
2445 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2448 sa->unsupported_cp = 0;
2450 /* else send empty response */
2452 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2454 if (sa->is_initiator)
2457 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2458 ikev2_notify_t notify;
2459 u8 *data = vec_new (u8, 4);
2460 clib_memset (¬ify, 0, sizeof (notify));
2461 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2462 notify.spi = sa->childs[0].i_proposals->spi;
2463 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2465 ikev2_payload_add_sa (chain, proposals);
2466 ikev2_payload_add_nonce (chain, sa->i_nonce);
2467 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2468 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2469 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2476 if (vec_len (sa->rekey) > 0)
2478 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2479 ikev2_payload_add_nonce (chain, sa->r_nonce);
2480 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2482 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2484 vec_del1 (sa->rekey, 0);
2486 else if (sa->unsupported_cp)
2488 u8 *data = vec_new (u8, 1);
2490 data[0] = sa->unsupported_cp;
2491 ikev2_payload_add_notify (chain,
2492 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2495 sa->unsupported_cp = 0;
2499 ikev2_payload_add_notify (chain,
2500 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2507 ike->version = IKE_VERSION_2;
2508 ike->nextpayload = IKEV2_PAYLOAD_SK;
2509 tlen = sizeof (*ike);
2511 if (sa->is_initiator)
2512 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2514 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2516 tlen += vec_len (chain->data);
2517 ike->nextpayload = chain->first_payload_type;
2518 ike->length = clib_host_to_net_u32 (tlen);
2520 if (tlen + b->current_length + b->current_data > buffer_data_size)
2526 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2528 /* store whole IKE payload - needed for PSK auth */
2529 vec_reset_length (sa->last_sa_init_res_packet_data);
2530 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2534 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2535 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2538 plen = sizeof (*ph);
2539 ph = (ike_payload_header_t *) & ike->payload[0];
2540 ph->nextpayload = chain->first_payload_type;
2543 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2544 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2545 plen += vec_len (chain->data) + iv_len;
2547 /* add space for hmac/tag */
2549 plen += tr_integ->key_trunc;
2551 plen += IKEV2_GCM_ICV_SIZE;
2554 if (tlen + b->current_length + b->current_data > buffer_data_size)
2560 /* payload and total length */
2561 ph->length = clib_host_to_net_u16 (plen);
2562 ike->length = clib_host_to_net_u32 (tlen);
2566 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2567 ph->payload, (u8 *) ike,
2568 sizeof (*ike) + sizeof (*ph),
2569 ph->payload + plen - sizeof (*ph) -
2570 IKEV2_GCM_ICV_SIZE))
2578 if (!ikev2_encrypt_data
2579 (ptd, sa, tr_encr, chain->data, ph->payload))
2585 ikev2_calc_integr (tr_integ,
2586 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2587 (u8 *) ike, tlen - tr_integ->key_trunc);
2588 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2589 sizeof (*ike), integ, tr_integ->key_trunc);
2592 /* store whole IKE payload - needed for retransmit */
2593 vec_reset_length (sa->last_res_packet_data);
2594 vec_add (sa->last_res_packet_data, ike, tlen);
2598 ikev2_payload_destroy_chain (chain);
2604 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2605 ip_address_t iaddr, ip_address_t raddr,
2610 u8 payload = ike->nextpayload;
2612 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2613 ip_address_cmp (&sa->iaddr, &iaddr) ||
2614 ip_address_cmp (&sa->raddr, &raddr))
2619 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2621 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2622 u32 plen = clib_net_to_host_u16 (ikep->length);
2624 if (plen < sizeof (ike_payload_header_t))
2627 if (payload == IKEV2_PAYLOAD_NONCE &&
2628 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2630 /* req is retransmit */
2631 if (sa->state == IKEV2_STATE_SA_INIT)
2633 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2634 u32 slen = clib_net_to_host_u32 (tmp->length);
2635 ike->ispi = tmp->ispi;
2636 ike->rspi = tmp->rspi;
2637 ike->nextpayload = tmp->nextpayload;
2638 ike->version = tmp->version;
2639 ike->exchange = tmp->exchange;
2640 ike->flags = tmp->flags;
2641 ike->msgid = tmp->msgid;
2642 ike->length = tmp->length;
2643 clib_memcpy_fast (ike->payload, tmp->payload,
2644 slen - sizeof (*ike));
2645 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2646 "ispi %lx IKE_SA_INIT retransmit "
2647 "from %d.%d.%d.%d to %d.%d.%d.%d",
2649 ip_addr_v4 (&raddr).as_u32,
2650 ip_addr_v4 (&iaddr).as_u32);
2653 /* else ignore req */
2656 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2657 "ispi %lx IKE_SA_INIT ignore "
2658 "from %d.%d.%d.%d to %d.%d.%d.%d",
2660 ip_addr_v4 (&raddr).as_u32,
2661 ip_addr_v4 (&iaddr).as_u32);
2665 payload = ikep->nextpayload;
2673 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2674 ip_address_t raddr, u32 rlen)
2678 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2681 pool_foreach (sa, ptd->sas, ({
2682 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2688 /* req is not retransmit */
2693 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2695 if (ike_hdr_is_response (ike))
2698 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2701 if (msg_id > sa->last_msg_id)
2703 sa->last_msg_id = msg_id;
2707 /* retransmitted req */
2708 if (msg_id == sa->last_msg_id)
2710 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2711 u32 slen = clib_net_to_host_u32 (tmp->length);
2712 ike->ispi = tmp->ispi;
2713 ike->rspi = tmp->rspi;
2714 ike->nextpayload = tmp->nextpayload;
2715 ike->version = tmp->version;
2716 ike->exchange = tmp->exchange;
2717 ike->flags = tmp->flags;
2718 ike->msgid = tmp->msgid;
2719 ike->length = tmp->length;
2720 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2721 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2722 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2723 ip_addr_v4 (&sa->iaddr).as_u32);
2727 /* old req ignore */
2728 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2729 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2730 ip_addr_v4 (&sa->iaddr).as_u32);
2735 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2737 ikev2_main_t *km = &ikev2_main;
2738 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2739 sa->profile_index = ~0;
2743 ikev2_del_sa_init_from_main (u64 * ispi)
2745 ikev2_main_t *km = &ikev2_main;
2746 uword *p = hash_get (km->sa_by_ispi, *ispi);
2749 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2750 hash_unset (km->sa_by_ispi, sai->ispi);
2751 ikev2_sa_free_all_vec (sai);
2752 pool_put (km->sais, sai);
2757 ikev2_del_sa_init (u64 ispi)
2759 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2763 static_always_inline void
2764 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2766 if (sa->is_initiator)
2768 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2769 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2773 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2774 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2778 static_always_inline void
2779 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2781 if (sa->is_initiator)
2783 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2784 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2788 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2789 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2793 static_always_inline void
2794 ikev2_set_ip_address (ikev2_sa_t * sa, const void *iaddr,
2795 const void *raddr, const int af)
2797 ip_address_set (&sa->raddr, raddr, af);
2798 ip_address_set (&sa->iaddr, iaddr, af);
2802 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2803 ip6_header_t * ip6, u8 is_ip4)
2808 src = ip4->src_address.as_u32;
2809 dst = ip4->dst_address.as_u32;
2813 src = ip6->src_address.as_u32[3];
2814 dst = ip6->dst_address.as_u32[3];
2816 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2817 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2818 exchange, src, dst);
2822 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2824 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2826 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2829 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2830 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2831 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2832 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2835 static_always_inline uword
2836 ikev2_node_internal (vlib_main_t * vm,
2837 vlib_node_runtime_t * node, vlib_frame_t * frame,
2840 u32 n_left = frame->n_vectors, *from;
2841 ikev2_main_t *km = &ikev2_main;
2842 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2843 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2844 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2847 from = vlib_frame_vector_args (frame);
2848 vlib_get_buffers (vm, from, bufs, n_left);
2853 vlib_buffer_t *b0 = b[0];
2854 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2855 : IKEV2_NEXT_IP6_ERROR_DROP;
2856 ip4_header_t *ip40 = 0;
2857 ip6_header_t *ip60 = 0;
2860 ikev2_sa_t *sa0 = 0;
2861 ikev2_sa_t sa; /* temporary store for SA */
2864 int is_req = 0, has_non_esp_marker = 0;
2866 ASSERT (0 == b0->punt_reason
2868 && b0->punt_reason ==
2869 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0]));
2872 && b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2874 u8 *ptr = vlib_buffer_get_current (b0);
2875 ip40 = (ip4_header_t *) ptr;
2876 ptr += sizeof (*ip40);
2877 udp0 = (udp_header_t *) ptr;
2878 ptr += sizeof (*udp0);
2879 ike0 = (ike_header_t *) ptr;
2880 ip_hdr_sz = sizeof (*ip40);
2884 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2885 ike0 = vlib_buffer_get_current (b0);
2886 vlib_buffer_advance (b0, -sizeof (*udp0));
2887 udp0 = vlib_buffer_get_current (b0);
2891 ip40 = (ip4_header_t *) ipx_hdr;
2892 ip_hdr_sz = sizeof (*ip40);
2896 ip60 = (ip6_header_t *) ipx_hdr;
2897 ip_hdr_sz = sizeof (*ip60);
2899 vlib_buffer_advance (b0, -ip_hdr_sz);
2902 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2904 /* check for non-esp marker */
2905 if (*((u32 *) ike0) == 0)
2908 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2909 rlen -= sizeof (ikev2_non_esp_marker);
2910 has_non_esp_marker = 1;
2913 if (clib_net_to_host_u32 (ike0->length) != rlen)
2915 vlib_node_increment_counter (vm, node->node_index,
2916 IKEV2_ERROR_BAD_LENGTH, 1);
2920 if (ike0->version != IKE_VERSION_2)
2922 vlib_node_increment_counter (vm, node->node_index,
2923 IKEV2_ERROR_NOT_IKEV2, 1);
2927 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2930 clib_memset (sa0, 0, sizeof (*sa0));
2932 if (ike_hdr_is_initiator (ike0))
2934 if (ike0->rspi == 0)
2937 ikev2_set_ip_address (sa0, &ip40->src_address,
2938 &ip40->dst_address, AF_IP4);
2940 ikev2_set_ip_address (sa0, &ip60->src_address,
2941 &ip60->dst_address, AF_IP6);
2943 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2946 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2950 vlib_node_increment_counter (vm, node->node_index,
2953 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2955 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2960 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2962 vlib_node_increment_counter (vm, node->node_index,
2963 IKEV2_ERROR_MALFORMED_PACKET,
2966 if (sa0->state == IKEV2_STATE_SA_INIT)
2968 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2970 ikev2_select_proposal (sa0->i_proposals,
2971 IKEV2_PROTOCOL_IKE);
2972 ikev2_generate_sa_init_data_and_log (sa0);
2975 if (sa0->state == IKEV2_STATE_SA_INIT
2976 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2978 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
2979 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2981 vlib_node_increment_counter (vm, node->node_index,
2982 IKEV2_ERROR_NO_BUFF_SPACE,
2986 if (sa0->state == IKEV2_STATE_SA_INIT)
2988 /* add SA to the pool */
2989 pool_get (ptd->sas, sa0);
2990 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2991 ikev2_init_sa (vm, sa0);
2992 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2996 ikev2_sa_free_all_vec (sa0);
3000 else //received sa_init without initiator flag
3003 ikev2_set_ip_address (sa0, &ip40->dst_address,
3004 &ip40->src_address, AF_IP4);
3006 ikev2_set_ip_address (sa0, &ip60->dst_address,
3007 &ip60->src_address, AF_IP6);
3009 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3011 if (sa0->state == IKEV2_STATE_SA_INIT)
3014 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3015 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3018 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3020 if (clib_atomic_bool_cmp_and_swap
3021 (&sai->init_response_received, 0, 1))
3023 ikev2_complete_sa_data (sa0, sai);
3024 ikev2_calc_keys (sa0);
3025 ikev2_sa_auth_init (sa0);
3026 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3028 clib_net_to_host_u32 (sai->last_init_msg_id);
3029 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3031 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3033 vlib_node_increment_counter (vm,
3035 IKEV2_ERROR_NO_BUFF_SPACE,
3040 /* we've already processed sa-init response */
3041 sa0->state = IKEV2_STATE_UNKNOWN;
3046 if (sa0->state == IKEV2_STATE_SA_INIT)
3048 /* add SA to the pool */
3049 pool_get (ptd->sas, sa0);
3050 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3051 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3055 ikev2_sa_free_all_vec (sa0);
3059 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3062 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3065 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3066 slen = ikev2_retransmit_resp (sa0, ike0);
3069 vlib_node_increment_counter (vm, node->node_index,
3072 IKEV2_ERROR_IKE_REQ_IGNORE
3074 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3079 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3080 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3082 ikev2_sa_auth (sa0);
3084 vlib_node_increment_counter (vm, node->node_index,
3085 IKEV2_ERROR_MALFORMED_PACKET, 1);
3086 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3088 ikev2_initial_contact_cleanup (ptd, sa0);
3089 ikev2_sa_match_ts (sa0);
3090 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3091 ikev2_create_tunnel_interface (vm, sa0,
3096 if (sa0->is_initiator)
3098 ikev2_del_sa_init (sa0->ispi);
3102 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3103 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3105 vlib_node_increment_counter (vm, node->node_index,
3106 IKEV2_ERROR_NO_BUFF_SPACE,
3111 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3114 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3117 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3118 slen = ikev2_retransmit_resp (sa0, ike0);
3121 vlib_node_increment_counter (vm, node->node_index,
3124 IKEV2_ERROR_IKE_REQ_IGNORE
3126 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3131 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3134 vlib_node_increment_counter (vm, node->node_index,
3135 IKEV2_ERROR_MALFORMED_PACKET,
3143 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3145 ikev2_delete_t *d, *tmp, *resp = 0;
3146 vec_foreach (d, sa0->del)
3148 ikev2_child_sa_t *ch_sa;
3149 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3151 !sa0->is_initiator);
3154 ikev2_delete_tunnel_interface (km->vnet_main,
3156 if (!sa0->is_initiator)
3158 vec_add2 (resp, tmp, 1);
3159 tmp->protocol_id = d->protocol_id;
3160 tmp->spi = ch_sa->r_proposals[0].spi;
3162 ikev2_sa_del_child_sa (sa0, ch_sa);
3165 if (!sa0->is_initiator)
3167 vec_free (sa0->del);
3172 if (ike_hdr_is_request (ike0))
3174 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3175 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3177 vlib_node_increment_counter (vm, node->node_index,
3178 IKEV2_ERROR_NO_BUFF_SPACE,
3183 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3186 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3189 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3190 slen = ikev2_retransmit_resp (sa0, ike0);
3193 vlib_node_increment_counter (vm, node->node_index,
3196 IKEV2_ERROR_IKE_REQ_IGNORE
3198 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3203 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3206 vlib_node_increment_counter (vm, node->node_index,
3207 IKEV2_ERROR_MALFORMED_PACKET,
3215 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3218 ikev2_sa_free_all_child_sa (&sa0->childs);
3219 ikev2_child_sa_t *child;
3220 vec_add2 (sa0->childs, child, 1);
3221 clib_memset (child, 0, sizeof (*child));
3222 child->r_proposals = sa0->rekey[0].r_proposal;
3223 child->i_proposals = sa0->rekey[0].i_proposal;
3224 child->tsi = sa0->rekey[0].tsi;
3225 child->tsr = sa0->rekey[0].tsr;
3226 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3227 child - sa0->childs, 1);
3229 if (ike_hdr_is_response (ike0))
3231 vec_free (sa0->rekey);
3235 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3236 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3238 vlib_node_increment_counter (vm, node->node_index,
3239 IKEV2_ERROR_NO_BUFF_SPACE,
3247 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3251 /* if we are sending packet back, rewrite headers */
3252 if (slen && ~0 != slen)
3256 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3257 ikev2_rewrite_v4_addrs (sa0, ip40);
3261 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3262 ikev2_rewrite_v6_addrs (sa0, ip60);
3267 udp0->dst_port = udp0->src_port =
3268 clib_net_to_host_u16 (ikev2_get_port (sa0));
3270 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3271 && ikev2_natt_active (sa0))
3273 if (!has_non_esp_marker)
3274 slen = ikev2_insert_non_esp_marker (ike0, slen);
3279 if (has_non_esp_marker)
3280 slen += sizeof (ikev2_non_esp_marker);
3282 u16 tp = udp0->dst_port;
3283 udp0->dst_port = udp0->src_port;
3284 udp0->src_port = tp;
3287 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3289 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3292 ip40->length = clib_host_to_net_u16 (b0->current_length);
3293 ip40->checksum = ip4_header_checksum (ip40);
3297 ip60->payload_length =
3298 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3302 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3303 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3305 ikev2_child_sa_t *c;
3307 vec_foreach (c, sa0->childs)
3308 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3310 ikev2_delete_sa (ptd, sa0);
3312 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3313 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3316 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3317 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3318 t->next_index = next[0];
3325 vlib_node_increment_counter (vm, node->node_index,
3326 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3327 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3328 return frame->n_vectors;
3332 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3334 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3338 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3340 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3344 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3345 .function = ikev2_ip4,
3346 .name = "ikev2-ip4",
3347 .vector_size = sizeof (u32),
3348 .format_trace = format_ikev2_trace,
3349 .type = VLIB_NODE_TYPE_INTERNAL,
3351 .n_errors = ARRAY_LEN(ikev2_error_strings),
3352 .error_strings = ikev2_error_strings,
3354 .n_next_nodes = IKEV2_IP4_N_NEXT,
3356 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3357 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3361 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3362 .function = ikev2_ip6,
3363 .name = "ikev2-ip6",
3364 .vector_size = sizeof (u32),
3365 .format_trace = format_ikev2_trace,
3366 .type = VLIB_NODE_TYPE_INTERNAL,
3368 .n_errors = ARRAY_LEN(ikev2_error_strings),
3369 .error_strings = ikev2_error_strings,
3371 .n_next_nodes = IKEV2_IP6_N_NEXT,
3373 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3374 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3379 // set ikev2 proposals when vpp is used as initiator
3380 static clib_error_t *
3381 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3382 ikev2_transforms_set * ts,
3383 ikev2_sa_proposal_t ** proposals, int is_ike)
3386 ikev2_main_t *km = &ikev2_main;
3387 ikev2_sa_proposal_t *proposal;
3388 vec_add2 (*proposals, proposal, 1);
3389 ikev2_sa_transform_t *td;
3394 vec_foreach (td, km->supported_transforms)
3396 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3397 && td->encr_type == ts->crypto_alg
3398 && td->key_len == ts->crypto_key_size / 8)
3401 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3402 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3403 vec_add (td->attrs, (u8 *) attr, 4);
3404 vec_add1 (proposal->transforms, *td);
3413 r = clib_error_return (0, "Unsupported algorithm");
3417 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3421 vec_foreach (td, km->supported_transforms)
3423 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3424 && td->integ_type == ts->integ_alg)
3426 vec_add1 (proposal->transforms, *td);
3434 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3435 r = clib_error_return (0, "Unsupported algorithm");
3444 vec_foreach (td, km->supported_transforms)
3446 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3447 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3449 vec_add1 (proposal->transforms, *td);
3456 r = clib_error_return (0, "Unsupported algorithm");
3465 vec_foreach (td, km->supported_transforms)
3467 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3469 vec_add1 (proposal->transforms, *td);
3472 sa->dh_group = td->dh_type;
3480 r = clib_error_return (0, "Unsupported algorithm");
3488 vec_foreach (td, km->supported_transforms)
3490 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3492 vec_add1 (proposal->transforms, *td);
3498 r = clib_error_return (0, "Unsupported algorithm");
3507 static ikev2_profile_t *
3508 ikev2_profile_index_by_name (u8 * name)
3510 ikev2_main_t *km = &ikev2_main;
3513 p = mhash_get (&km->profile_index_by_name, name);
3517 return pool_elt_at_index (km->profiles, p[0]);
3522 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3523 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3532 b0 = vlib_get_buffer (vm, bi0);
3533 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3534 udp0 = vlib_buffer_get_current (b0);
3535 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3536 udp0->src_port = clib_host_to_net_u16 (src_port);
3537 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3540 if (ip_addr_version (dst) == AF_IP4)
3542 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3543 ip40 = vlib_buffer_get_current (b0);
3544 ip40->ip_version_and_header_length = 0x45;
3546 ip40->fragment_id = 0;
3547 ip40->flags_and_fragment_offset = 0;
3549 ip40->protocol = IP_PROTOCOL_UDP;
3550 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3551 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3552 b0->current_length =
3553 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3554 ip40->length = clib_host_to_net_u16 (b0->current_length);
3555 ip40->checksum = ip4_header_checksum (ip40);
3559 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3560 ip60 = vlib_buffer_get_current (b0);
3562 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3563 ip60->ip_version_traffic_class_and_flow_label =
3564 clib_host_to_net_u32 (0x6 << 28);
3565 ip60->payload_length =
3566 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3567 ip60->protocol = IP_PROTOCOL_UDP;
3568 ip60->hop_limit = 0xff;
3569 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3570 sizeof (ip60->src_address));
3571 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3572 sizeof (ip60->src_address));
3575 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3576 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3577 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3579 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3580 ip4_lookup_node.index : ip6_lookup_node.index;
3582 /* send the request */
3583 f = vlib_get_frame_to_node (vm, next_index);
3584 to_next = vlib_frame_vector_args (f);
3587 vlib_put_frame_to_node (vm, next_index, f);
3592 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3595 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3600 *b = vlib_get_buffer (vm, bi0);
3605 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3607 ikev2_main_t *km = &ikev2_main;
3610 EVP_PKEY_free (km->pkey);
3611 km->pkey = ikev2_load_key_file (file);
3612 if (km->pkey == NULL)
3613 return clib_error_return (0, "load key '%s' failed", file);
3618 static_always_inline vnet_api_error_t
3619 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3621 ikev2_main_t *km = &ikev2_main;
3622 udp_dst_port_info_t *pi;
3624 uword *v = hash_get (km->udp_ports, port);
3625 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3629 /* IKE already uses this port, only increment reference counter */
3636 return VNET_API_ERROR_UDP_PORT_TAKEN;
3638 udp_register_dst_port (km->vlib_main, port,
3639 ipsec4_tun_input_node.index, 1);
3640 hash_set (km->udp_ports, port, 1);
3642 p->ipsec_over_udp_port = port;
3646 static_always_inline void
3647 ikev2_unregister_udp_port (ikev2_profile_t * p)
3649 ikev2_main_t *km = &ikev2_main;
3652 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3655 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3663 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3664 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3667 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3671 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3672 ikev2_main_per_thread_data_t * tkm,
3673 ikev2_sa_t * sa, u8 send_notification)
3675 ikev2_main_t *km = &ikev2_main;
3676 ip_address_t *src, *dst;
3678 ikev2_child_sa_t *c;
3680 /* Create the Initiator notification for IKE SA removal */
3685 vec_resize (sa->del, 1);
3686 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3687 sa->del->spi = sa->ispi;
3689 if (send_notification)
3691 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3694 ikev2_log_error ("buffer alloc failure");
3698 ike0 = vlib_buffer_get_current (b0);
3699 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3700 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3701 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3703 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3704 sa->last_init_msg_id += 1;
3705 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3709 if (ikev2_natt_active (sa))
3710 len = ikev2_insert_non_esp_marker (ike0, len);
3712 if (sa->is_initiator)
3723 ikev2_send_ike (vm, src, dst, bi0, len,
3724 ikev2_get_port (sa), sa->dst_port, 0);
3728 /* delete local SA */
3729 vec_foreach (c, sa->childs)
3730 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3732 u64 rspi = sa->rspi;
3733 ikev2_sa_free_all_vec (sa);
3734 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3737 hash_unset (tkm->sa_by_rspi, rspi);
3738 pool_put (tkm->sas, sa);
3743 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3745 ikev2_main_per_thread_data_t *tkm;
3747 u32 pi = p - km->profiles;
3752 pool_foreach(sa, km->sais, ({
3753 if (pi == sa->profile_index)
3754 vec_add1 (del_sai, sa - km->sais);
3758 vec_foreach (sai, del_sai)
3760 sa = pool_elt_at_index (km->sais, sai[0]);
3761 ikev2_sa_free_all_vec (sa);
3762 hash_unset (km->sa_by_ispi, sa->ispi);
3763 pool_put (km->sais, sa);
3765 vec_reset_length (del_sai);
3767 vec_foreach (tkm, km->per_thread_data)
3770 pool_foreach (sa, tkm->sas, ({
3771 if (sa->profile_index != ~0 && pi == sa->profile_index)
3772 vec_add1 (del_sai, sa - tkm->sas);
3776 vec_foreach (sai, del_sai)
3778 sa = pool_elt_at_index (tkm->sas, sai[0]);
3779 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3782 vec_reset_length (del_sai);
3789 ikev2_profile_free (ikev2_profile_t * p)
3793 vec_free (p->auth.data);
3795 EVP_PKEY_free (p->auth.key);
3797 vec_free (p->loc_id.data);
3798 vec_free (p->rem_id.data);
3802 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3804 ikev2_main_t *km = &ikev2_main;
3809 if (ikev2_profile_index_by_name (name))
3810 return clib_error_return (0, "policy %v already exists", name);
3812 pool_get (km->profiles, p);
3813 clib_memset (p, 0, sizeof (*p));
3814 p->name = vec_dup (name);
3815 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3816 p->responder.sw_if_index = ~0;
3818 uword index = p - km->profiles;
3819 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3823 p = ikev2_profile_index_by_name (name);
3825 return clib_error_return (0, "policy %v does not exists", name);
3827 ikev2_unregister_udp_port (p);
3828 ikev2_cleanup_profile_sessions (km, p);
3830 ikev2_profile_free (p);
3831 pool_put (km->profiles, p);
3832 mhash_unset (&km->profile_index_by_name, name, 0);
3838 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3839 u8 * auth_data, u8 data_hex_format)
3844 p = ikev2_profile_index_by_name (name);
3848 r = clib_error_return (0, "unknown profile %v", name);
3853 EVP_PKEY_free (p->auth.key);
3854 vec_free (p->auth.data);
3856 p->auth.method = auth_method;
3857 p->auth.data = vec_dup (auth_data);
3858 p->auth.hex = data_hex_format;
3860 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3862 vec_add1 (p->auth.data, 0);
3863 p->auth.key = ikev2_load_cert_file (p->auth.data);
3864 if (p->auth.key == NULL)
3865 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3872 ikev2_is_id_supported (u8 id_type)
3874 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3875 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3876 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3877 id_type == IKEV2_ID_TYPE_ID_FQDN);
3881 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3887 if (!ikev2_is_id_supported (id_type))
3889 r = clib_error_return (0, "unsupported identity type %U",
3890 format_ikev2_id_type, id_type);
3894 p = ikev2_profile_index_by_name (name);
3898 r = clib_error_return (0, "unknown profile %v", name);
3904 vec_free (p->loc_id.data);
3905 p->loc_id.type = id_type;
3906 p->loc_id.data = vec_dup (data);
3910 vec_free (p->rem_id.data);
3911 p->rem_id.type = id_type;
3912 p->rem_id.data = vec_dup (data);
3918 static_always_inline void
3919 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3921 if (ip_addr_version (addr) == AF_IP4)
3922 ts->ts_type = TS_IPV4_ADDR_RANGE;
3924 ts->ts_type = TS_IPV6_ADDR_RANGE;
3927 static_always_inline void
3928 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3929 const ip_address_t * end)
3931 ip_address_copy (&ts->start_addr, start);
3932 ip_address_copy (&ts->end_addr, end);
3936 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3937 u16 start_port, u16 end_port, ip_address_t start_addr,
3938 ip_address_t end_addr, int is_local)
3943 p = ikev2_profile_index_by_name (name);
3947 r = clib_error_return (0, "unknown profile %v", name);
3951 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3952 return clib_error_return (0, "IP address version mismatch!");
3956 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3957 p->loc_ts.start_port = start_port;
3958 p->loc_ts.end_port = end_port;
3959 p->loc_ts.protocol_id = protocol_id;
3960 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3964 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3965 p->rem_ts.start_port = start_port;
3966 p->rem_ts.end_port = end_port;
3967 p->rem_ts.protocol_id = protocol_id;
3968 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3976 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3977 u32 sw_if_index, ip_address_t addr)
3982 p = ikev2_profile_index_by_name (name);
3986 r = clib_error_return (0, "unknown profile %v", name);
3990 p->responder.sw_if_index = sw_if_index;
3991 ip_address_copy (&p->responder.addr, &addr);
3997 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3998 ikev2_transform_encr_type_t crypto_alg,
3999 ikev2_transform_integ_type_t integ_alg,
4000 ikev2_transform_dh_type_t dh_type,
4001 u32 crypto_key_size)
4006 p = ikev2_profile_index_by_name (name);
4010 r = clib_error_return (0, "unknown profile %v", name);
4014 p->ike_ts.crypto_alg = crypto_alg;
4015 p->ike_ts.integ_alg = integ_alg;
4016 p->ike_ts.dh_type = dh_type;
4017 p->ike_ts.crypto_key_size = crypto_key_size;
4022 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4023 ikev2_transform_encr_type_t crypto_alg,
4024 ikev2_transform_integ_type_t integ_alg,
4025 u32 crypto_key_size)
4030 p = ikev2_profile_index_by_name (name);
4034 r = clib_error_return (0, "unknown profile %v", name);
4038 p->esp_ts.crypto_alg = crypto_alg;
4039 p->esp_ts.integ_alg = integ_alg;
4040 p->esp_ts.crypto_key_size = crypto_key_size;
4045 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4046 u8 * name, u32 sw_if_index)
4051 p = ikev2_profile_index_by_name (name);
4055 r = clib_error_return (0, "unknown profile %v", name);
4059 p->tun_itf = sw_if_index;
4065 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4068 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4069 ikev2_main_t *km = &ikev2_main;
4070 vnet_api_error_t rv = 0;
4074 return VNET_API_ERROR_INVALID_VALUE;
4078 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4079 return VNET_API_ERROR_VALUE_EXIST;
4081 rv = ikev2_register_udp_port (p, port);
4085 v = hash_get (km->udp_ports, port);
4087 return VNET_API_ERROR_IKE_NO_PORT;
4089 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4090 return VNET_API_ERROR_INVALID_VALUE;
4092 ikev2_unregister_udp_port (p);
4098 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4100 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4105 r = clib_error_return (0, "unknown profile %v", name);
4114 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4115 u64 lifetime, u32 jitter, u32 handover,
4121 p = ikev2_profile_index_by_name (name);
4125 r = clib_error_return (0, "unknown profile %v", name);
4129 p->lifetime = lifetime;
4130 p->lifetime_jitter = jitter;
4131 p->handover = handover;
4132 p->lifetime_maxdata = maxdata;
4137 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4138 ip_address_t * out_addr)
4140 ip4_address_t *if_ip4;
4141 ip6_address_t *if_ip6;
4145 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4148 ip_address_set (out_addr, if_ip4, AF_IP4);
4154 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4157 ip_address_set (out_addr, if_ip6, AF_IP6);
4165 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4169 ikev2_main_t *km = &ikev2_main;
4173 int len = sizeof (ike_header_t), valid_ip = 0;
4174 ip_address_t if_ip = ip_address_initializer;
4176 p = ikev2_profile_index_by_name (name);
4180 r = clib_error_return (0, "unknown profile %v", name);
4184 if (p->responder.sw_if_index == ~0
4185 || ip_address_is_zero (&p->responder.addr))
4187 r = clib_error_return (0, "responder not set for profile %v", name);
4191 if (ikev2_get_if_address (p->responder.sw_if_index,
4192 ip_addr_version (&p->responder.addr), &if_ip))
4197 /* Prepare the SA and the IKE payload */
4199 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4200 ikev2_payload_chain_t *chain = 0;
4201 ikev2_payload_new_chain (chain);
4203 /* Build the IKE proposal payload */
4204 ikev2_sa_proposal_t *proposals = 0;
4205 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4206 proposals[0].proposal_num = 1;
4207 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4209 /* Add and then cleanup proposal data */
4210 ikev2_payload_add_sa (chain, proposals);
4211 ikev2_sa_free_proposal_vector (&proposals);
4213 sa.is_initiator = 1;
4214 sa.profile_index = p - km->profiles;
4215 sa.state = IKEV2_STATE_SA_INIT;
4216 sa.tun_itf = p->tun_itf;
4217 sa.udp_encap = p->udp_encap;
4218 if (p->natt_disabled)
4219 sa.natt_state = IKEV2_NATT_DISABLED;
4220 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4221 sa.is_tun_itf_set = 1;
4222 sa.initial_contact = 1;
4223 sa.dst_port = IKEV2_PORT;
4225 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4226 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4228 ikev2_sa_free_all_vec (&sa);
4229 ikev2_payload_destroy_chain (chain);
4230 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4233 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4234 ikev2_payload_add_nonce (chain, sa.i_nonce);
4236 /* Build the child SA proposal */
4237 vec_resize (sa.childs, 1);
4238 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4239 &sa.childs[0].i_proposals, 0);
4240 sa.childs[0].i_proposals[0].proposal_num = 1;
4241 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4242 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4243 sizeof (sa.childs[0].i_proposals[0].spi));
4245 /* Add NAT detection notification messages (mandatory) */
4246 u8 *nat_detection_sha1 =
4247 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4248 clib_host_to_net_u64 (sa.rspi),
4249 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4251 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4252 nat_detection_sha1);
4253 vec_free (nat_detection_sha1);
4254 nat_detection_sha1 =
4255 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4256 clib_host_to_net_u64 (sa.rspi),
4258 clib_host_to_net_u16 (sa.dst_port));
4259 ikev2_payload_add_notify (chain,
4260 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4261 nat_detection_sha1);
4262 vec_free (nat_detection_sha1);
4264 u8 *sig_hash_algo = vec_new (u8, 8);
4265 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4266 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4267 ikev2_payload_add_notify (chain,
4268 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4270 vec_free (sig_hash_algo);
4272 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4275 ikev2_sa_free_all_vec (&sa);
4276 ikev2_payload_destroy_chain (chain);
4277 char *errmsg = "buffer alloc failure";
4278 ikev2_log_error (errmsg);
4279 return clib_error_return (0, errmsg);
4281 ike0 = vlib_buffer_get_current (b0);
4283 /* Buffer update and boilerplate */
4284 len += vec_len (chain->data);
4285 ike0->nextpayload = chain->first_payload_type;
4286 ike0->length = clib_host_to_net_u32 (len);
4287 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4288 ikev2_payload_destroy_chain (chain);
4290 ike0->version = IKE_VERSION_2;
4291 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4292 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4293 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4296 sa.last_init_msg_id += 1;
4298 /* store whole IKE payload - needed for PSK auth */
4299 vec_reset_length (sa.last_sa_init_req_packet_data);
4300 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4302 /* add data to the SA then add it to the pool */
4303 ip_address_copy (&sa.iaddr, &if_ip);
4304 ip_address_copy (&sa.raddr, &p->responder.addr);
4305 sa.i_id.type = p->loc_id.type;
4306 sa.i_id.data = vec_dup (p->loc_id.data);
4307 sa.r_id.type = p->rem_id.type;
4308 sa.r_id.data = vec_dup (p->rem_id.data);
4309 sa.i_auth.method = p->auth.method;
4310 sa.i_auth.hex = p->auth.hex;
4311 sa.i_auth.data = vec_dup (p->auth.data);
4312 sa.sw_if_index = p->responder.sw_if_index;
4313 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4314 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4316 ikev2_initial_contact_cleanup (0, &sa);
4318 /* add SA to the pool */
4319 ikev2_sa_t *sa0 = 0;
4320 pool_get (km->sais, sa0);
4321 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4322 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4326 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4327 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4330 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4331 clib_host_to_net_u64 (sa0->ispi), 0,
4332 ip_addr_v4 (&p->responder.addr).as_u32,
4333 ip_addr_version (&p->responder.addr) == AF_IP4);
4338 clib_error_return (0, "interface %U does not have any IP address!",
4339 format_vnet_sw_if_index_name, vnet_get_main (),
4340 p->responder.sw_if_index);
4348 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4349 ikev2_child_sa_t * csa)
4351 /* Create the Initiator notification for child SA removal */
4352 ikev2_main_t *km = &ikev2_main;
4358 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4361 ikev2_log_error ("buffer alloc failure");
4365 ike0 = vlib_buffer_get_current (b0);
4366 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4367 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4368 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4370 vec_resize (sa->del, 1);
4371 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4372 sa->del->spi = csa->i_proposals->spi;
4373 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4374 sa->last_init_msg_id += 1;
4375 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4379 if (ikev2_natt_active (sa))
4380 len = ikev2_insert_non_esp_marker (ike0, len);
4381 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4382 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4384 /* delete local child SA */
4385 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4386 ikev2_sa_del_child_sa (sa, csa);
4390 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4393 ikev2_main_t *km = &ikev2_main;
4394 ikev2_main_per_thread_data_t *tkm;
4395 ikev2_sa_t *fsa = 0;
4396 ikev2_child_sa_t *fchild = 0;
4398 /* Search for the child SA */
4399 vec_foreach (tkm, km->per_thread_data)
4405 pool_foreach (sa, tkm->sas, ({
4406 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4416 if (!fchild || !fsa)
4418 r = clib_error_return (0, "Child SA not found");
4423 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4430 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4433 ikev2_main_t *km = &ikev2_main;
4434 ikev2_main_per_thread_data_t *tkm;
4435 ikev2_sa_t *fsa = 0;
4436 ikev2_main_per_thread_data_t *ftkm = 0;
4438 /* Search for the IKE SA */
4439 vec_foreach (tkm, km->per_thread_data)
4445 pool_foreach (sa, tkm->sas, ({
4446 if (sa->ispi == ispi)
4458 r = clib_error_return (0, "IKE SA not found");
4462 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4467 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4468 ikev2_child_sa_t * csa)
4470 /* Create the Initiator request for create child SA */
4476 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4479 ikev2_log_error ("buffer alloc failure");
4483 ike0 = vlib_buffer_get_current (b0);
4484 ike0->version = IKE_VERSION_2;
4485 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4486 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4487 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4488 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4489 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4490 sa->last_init_msg_id += 1;
4492 ikev2_rekey_t *rekey;
4493 vec_reset_length (sa->rekey);
4494 vec_add2 (sa->rekey, rekey, 1);
4495 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4498 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4499 rekey->spi = proposals[0].spi;
4500 rekey->ispi = csa->i_proposals->spi;
4501 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4505 if (ikev2_natt_active (sa))
4506 len = ikev2_insert_non_esp_marker (ike0, len);
4507 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4508 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4509 vec_free (proposals);
4513 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4516 ikev2_main_t *km = &ikev2_main;
4517 ikev2_main_per_thread_data_t *tkm;
4518 ikev2_sa_t *fsa = 0;
4519 ikev2_child_sa_t *fchild = 0;
4521 /* Search for the child SA */
4522 vec_foreach (tkm, km->per_thread_data)
4528 pool_foreach (sa, tkm->sas, ({
4529 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4539 if (!fchild || !fsa)
4541 r = clib_error_return (0, "Child SA not found");
4546 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4553 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4555 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4559 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4561 u64 *ispi, *ispi_vec = 0;
4562 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4563 ikev2_main_t *km = &ikev2_main;
4564 ikev2_main_per_thread_data_t *tkm;
4565 p->responder.sw_if_index = ~0;
4567 vec_foreach (tkm, km->per_thread_data)
4570 pool_foreach (sa, tkm->sas, ({
4571 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4572 vec_add1 (sa_vec, sa);
4576 vec_foreach (sap, sa_vec)
4578 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4580 vec_reset_length (sa_vec);
4585 pool_foreach (sa, km->sais, ({
4586 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4587 vec_add1 (ispi_vec, sa->ispi);
4591 vec_foreach (ispi, ispi_vec)
4593 ikev2_del_sa_init_from_main (ispi);
4596 vec_free (ispi_vec);
4599 static clib_error_t *
4600 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4602 ikev2_main_t *km = &ikev2_main;
4609 pool_foreach (p, km->profiles, ({
4610 if (p->responder.sw_if_index == sw_if_index)
4611 ikev2_sa_del (p, sw_if_index);
4618 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4621 ikev2_init (vlib_main_t * vm)
4623 ikev2_main_t *km = &ikev2_main;
4624 vlib_thread_main_t *tm = vlib_get_thread_main ();
4627 clib_memset (km, 0, sizeof (ikev2_main_t));
4628 km->vnet_main = vnet_get_main ();
4631 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4632 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4633 ikev2_crypto_init (km);
4635 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4637 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4638 CLIB_CACHE_LINE_BYTES);
4639 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4641 ikev2_main_per_thread_data_t *ptd =
4642 vec_elt_at_index (km->per_thread_data, thread_id);
4644 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4646 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4647 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4648 ptd->hmac_ctx = HMAC_CTX_new ();
4650 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4651 ptd->evp_ctx = &ptd->_evp_ctx;
4652 HMAC_CTX_init (&(ptd->_hmac_ctx));
4653 ptd->hmac_ctx = &ptd->_hmac_ctx;
4657 km->sa_by_ispi = hash_create (0, sizeof (uword));
4658 km->sw_if_indices = hash_create (0, 0);
4659 km->udp_ports = hash_create (0, sizeof (uword));
4661 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4662 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4663 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4664 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4666 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4667 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4669 ikev2_cli_reference ();
4671 km->log_level = IKEV2_LOG_ERROR;
4672 km->log_class = vlib_log_register_class ("ikev2", 0);
4677 VLIB_INIT_FUNCTION (ikev2_init) =
4679 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4684 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4687 ikev2_main_t *km = &ikev2_main;
4688 ikev2_profile_t *p = 0;
4689 vlib_main_t *vm = km->vlib_main;
4690 f64 now = vlib_time_now (vm);
4693 if (sa->profile_index != ~0)
4694 p = pool_elt_at_index (km->profiles, sa->profile_index);
4696 if (sa->is_initiator && p && csa->time_to_expiration
4697 && now > csa->time_to_expiration)
4699 if (!csa->is_expired || csa->rekey_retries > 0)
4701 ikev2_rekey_child_sa_internal (vm, sa, csa);
4702 csa->time_to_expiration = now + p->handover;
4703 csa->is_expired = 1;
4704 if (csa->rekey_retries == 0)
4706 csa->rekey_retries = 5;
4708 else if (csa->rekey_retries > 0)
4710 csa->rekey_retries--;
4711 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4712 csa->i_proposals->spi, csa->rekey_retries);
4713 if (csa->rekey_retries == 0)
4715 csa->rekey_retries = -1;
4722 csa->time_to_expiration = 0;
4723 ikev2_delete_child_sa_internal (vm, sa, csa);
4731 ipip_tunnel_t *ipip = NULL;
4732 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4733 if (~0 == sw_if_index)
4735 ip46_address_t local_ip;
4736 ip46_address_t remote_ip;
4737 if (sa->is_initiator)
4739 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4740 ip_addr_bytes (&sa->iaddr));
4741 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4742 ip_addr_bytes (&sa->raddr));
4746 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4747 ip_addr_bytes (&sa->raddr));
4748 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4749 ip_addr_bytes (&sa->iaddr));
4753 ipip_tunnel_key_t key = {
4756 .transport = IPIP_TRANSPORT_IP4,
4761 ipip = ipip_tunnel_db_find (&key);
4764 sw_if_index = ipip->sw_if_index;
4770 vec_add1 (sas_in, csa->remote_sa_id);
4771 vlib_worker_thread_barrier_sync (vm);
4772 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4773 csa->local_sa_id, sas_in);
4776 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4777 vlib_worker_thread_barrier_release (vm);
4784 ikev2_set_log_level (ikev2_log_level_t log_level)
4786 ikev2_main_t *km = &ikev2_main;
4788 if (log_level >= IKEV2_LOG_MAX)
4790 ikev2_log_error ("unknown logging level %d", log_level);
4794 km->log_level = log_level;
4799 ikev2_set_liveness_params (u32 period, u32 max_retries)
4801 ikev2_main_t *km = &ikev2_main;
4803 if (period == 0 || max_retries == 0)
4804 return clib_error_return (0, "invalid args");
4806 km->liveness_period = period;
4807 km->liveness_max_retries = max_retries;
4812 ikev2_profile_natt_disable (u8 * name)
4814 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4816 return clib_error_return (0, "unknown profile %v", name);
4818 p->natt_disabled = 1;
4823 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4825 ikev2_main_t *km = &ikev2_main;
4826 vlib_main_t *vm = km->vlib_main;
4827 ikev2_main_per_thread_data_t *tkm;
4828 ikev2_sa_t *fsa = 0;
4829 ikev2_profile_t *p = 0;
4830 ikev2_child_sa_t *fchild = 0;
4831 f64 now = vlib_time_now (vm);
4832 vlib_counter_t counts;
4834 /* Search for the SA and child SA */
4835 vec_foreach (tkm, km->per_thread_data)
4841 pool_foreach (sa, tkm->sas, ({
4842 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4851 vlib_get_combined_counter (&ipsec_sa_counters,
4852 ipsec_sa->stat_index, &counts);
4854 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4855 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4857 if (fchild && p && p->lifetime_maxdata)
4859 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4861 fchild->time_to_expiration = now;
4867 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4873 if (ip_address_is_zero (&sa->iaddr))
4875 p = pool_elt_at_index (km->profiles, sa->profile_index);
4876 if (!ikev2_get_if_address (p->responder.sw_if_index,
4877 ip_addr_version (&p->responder.addr),
4881 /* update NAT detection payload */
4883 ikev2_find_ike_notify_payload
4884 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4885 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4889 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4890 clib_host_to_net_u64 (sa->rspi),
4892 clib_host_to_net_u16 (IKEV2_PORT));
4893 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4898 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4901 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4902 clib_memcpy_fast (vlib_buffer_get_current (b),
4903 sa->last_sa_init_req_packet_data,
4904 vec_len (sa->last_sa_init_req_packet_data));
4906 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4907 vec_len (sa->last_sa_init_req_packet_data),
4908 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4912 ikev2_process_pending_sa_init (ikev2_main_t * km)
4919 hash_foreach (ispi, sai, km->sa_by_ispi,
4921 sa = pool_elt_at_index (km->sais, sai);
4922 if (sa->init_response_received)
4925 ikev2_process_pending_sa_init_one (km, sa);
4931 ikev2_send_informational_request (ikev2_sa_t * sa)
4933 ikev2_main_t *km = &ikev2_main;
4934 ip_address_t *src, *dst;
4941 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4944 ikev2_log_error ("buffer alloc failure");
4948 ike0 = vlib_buffer_get_current (b0);
4949 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4950 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4951 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4952 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4954 sa->last_init_msg_id += 1;
4955 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4959 if (ikev2_natt_active (sa))
4960 len = ikev2_insert_non_esp_marker (ike0, len);
4962 if (sa->is_initiator)
4973 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4974 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4979 ikev2_disable_dpd (void)
4981 ikev2_main_t *km = &ikev2_main;
4982 km->dpd_disabled = 1;
4985 static_always_inline int
4986 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4988 ikev2_main_t *km = &ikev2_main;
4989 vlib_main_t *vm = km->vlib_main;
4991 if (!sa->keys_generated)
4994 if (sa->liveness_retries >= km->liveness_max_retries)
4997 f64 now = vlib_time_now (vm);
4999 if (sa->liveness_period_check < now)
5001 sa->liveness_retries++;
5002 sa->liveness_period_check = now + km->liveness_period;
5003 ikev2_send_informational_request (sa);
5009 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5012 ikev2_main_t *km = &ikev2_main;
5013 ipsec_main_t *im = &ipsec_main;
5015 ikev2_child_sa_t *c;
5020 vlib_process_wait_for_event_or_clock (vm, 2);
5021 vlib_process_get_events (vm, NULL);
5023 /* process ike child sas */
5024 ikev2_main_per_thread_data_t *tkm;
5025 vec_foreach (tkm, km->per_thread_data)
5028 u32 *to_be_deleted = 0;
5031 pool_foreach (sa, tkm->sas, ({
5032 ikev2_child_sa_t *c;
5035 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5038 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5040 sa->old_remote_id_present = 0;
5044 sa->old_id_expiration -= 1;
5046 vec_foreach (c, sa->childs)
5047 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5049 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5050 vec_add1 (to_be_deleted, sa - tkm->sas);
5054 vec_foreach (sai, to_be_deleted)
5056 sa = pool_elt_at_index (tkm->sas, sai[0]);
5057 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5058 vec_foreach (c, sa->childs)
5060 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5061 ikev2_sa_del_child_sa (sa, c);
5063 ikev2_sa_free_all_vec (sa);
5064 hash_unset (tkm->sa_by_rspi, sa->rspi);
5065 pool_put (tkm->sas, sa);
5069 p = pool_elt_at_index (km->profiles, sa->profile_index);
5072 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5075 ikev2_log_error ("%U", format_clib_error, e);
5076 clib_error_free (e);
5081 vec_free (to_be_deleted);
5084 /* process ipsec sas */
5087 pool_foreach (sa, im->sad, ({
5088 ikev2_mngr_process_ipsec_sa(sa);
5092 ikev2_process_pending_sa_init (km);
5098 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5099 .function = ikev2_mngr_process_fn,
5100 .type = VLIB_NODE_TYPE_PROCESS,
5102 "ikev2-manager-process",
5105 VLIB_PLUGIN_REGISTER () = {
5106 .version = VPP_BUILD_VER,
5107 .description = "Internet Key Exchange (IKEv2) Protocol",
5112 * fd.io coding-style-patch-verification: ON
5115 * eval: (c-set-style "gnu")