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>
31 #include <plugins/ikev2/ikev2.api_enum.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v, ...) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v __VA_ARGS__, sa->ispi); \
57 u16 n_exchange_sa_req;
62 format_ikev2_trace (u8 * s, va_list * args)
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
68 s = format (s, "ikev2: sw_if_index %d, next index %d",
69 t->sw_if_index, t->next_index);
73 #define IKEV2_GENERATE_SA_INIT_OK_str ""
74 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
75 "no DH group configured for IKE proposals!"
76 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
77 "DH group not supported!"
81 IKEV2_GENERATE_SA_INIT_OK,
82 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
83 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
84 } ikev2_generate_sa_error_t;
87 format_ikev2_gen_sa_error (u8 * s, va_list * args)
89 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
92 case IKEV2_GENERATE_SA_INIT_OK:
94 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
95 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
97 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
98 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
106 IKEV2_NEXT_IP4_LOOKUP,
107 IKEV2_NEXT_IP4_ERROR_DROP,
113 IKEV2_NEXT_IP6_LOOKUP,
114 IKEV2_NEXT_IP6_ERROR_DROP,
118 typedef u32 ikev2_non_esp_marker;
120 static_always_inline u16
121 ikev2_get_port (ikev2_sa_t * sa)
123 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
126 static_always_inline int
127 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
129 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
130 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
131 return len + sizeof (ikev2_non_esp_marker);
134 static ikev2_sa_transform_t *
135 ikev2_find_transform_data (ikev2_sa_transform_t * t)
137 ikev2_main_t *km = &ikev2_main;
138 ikev2_sa_transform_t *td;
140 vec_foreach (td, km->supported_transforms)
142 if (td->type != t->type)
145 if (td->transform_id != t->transform_id)
148 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
150 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
151 || t->attrs[1] != 14)
154 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
162 static ikev2_sa_proposal_t *
163 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
164 ikev2_protocol_id_t prot_id)
166 ikev2_sa_proposal_t *rv = 0;
167 ikev2_sa_proposal_t *proposal;
168 ikev2_sa_transform_t *transform, *new_t;
169 u8 mandatory_bitmap, optional_bitmap;
171 if (prot_id == IKEV2_PROTOCOL_IKE)
173 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
174 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
175 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
177 else if (prot_id == IKEV2_PROTOCOL_ESP)
179 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
180 (1 << IKEV2_TRANSFORM_TYPE_ESN);
181 optional_bitmap = mandatory_bitmap |
182 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
184 else if (prot_id == IKEV2_PROTOCOL_AH)
186 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
187 (1 << IKEV2_TRANSFORM_TYPE_ESN);
188 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
193 vec_add2 (rv, proposal, 1);
195 vec_foreach (proposal, proposals)
198 if (proposal->protocol_id != prot_id)
201 vec_foreach (transform, proposal->transforms)
203 if ((1 << transform->type) & bitmap)
206 if (ikev2_find_transform_data (transform))
208 bitmap |= 1 << transform->type;
209 vec_add2 (rv->transforms, new_t, 1);
210 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
211 new_t->attrs = vec_dup (transform->attrs);
215 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
216 (bitmap & ~optional_bitmap) == 0)
218 rv->proposal_num = proposal->proposal_num;
219 rv->protocol_id = proposal->protocol_id;
220 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
225 vec_free (rv->transforms);
234 ikev2_sa_transform_t *
235 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
236 ikev2_transform_type_t type)
238 ikev2_sa_transform_t *t;
243 vec_foreach (t, p->transforms)
246 return ikev2_find_transform_data (t);
252 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
256 vec_foreach (c, sa->childs)
258 ikev2_sa_proposal_t *proposal =
259 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
260 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
268 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
270 ikev2_sa_proposal_t *p;
271 ikev2_sa_transform_t *t;
278 vec_foreach (t, p->transforms)
282 vec_free (p->transforms);
288 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
290 ikev2_sa_free_proposal_vector (&c->r_proposals);
291 ikev2_sa_free_proposal_vector (&c->i_proposals);
301 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
304 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
310 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
312 ikev2_sa_free_child_sa (child);
313 vec_del1 (sa->childs, child - sa->childs);
317 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
319 vec_free (sa->i_nonce);
320 vec_free (sa->r_nonce);
322 vec_free (sa->dh_shared_key);
323 vec_free (sa->dh_private_key);
324 vec_free (sa->i_dh_data);
325 vec_free (sa->r_dh_data);
327 ikev2_sa_free_proposal_vector (&sa->r_proposals);
328 ikev2_sa_free_proposal_vector (&sa->i_proposals);
331 vec_free (sa->sk_ai);
332 vec_free (sa->sk_ar);
333 vec_free (sa->sk_ei);
334 vec_free (sa->sk_er);
335 vec_free (sa->sk_pi);
336 vec_free (sa->sk_pr);
338 vec_free (sa->i_id.data);
339 vec_free (sa->r_id.data);
341 vec_free (sa->i_auth.data);
343 EVP_PKEY_free (sa->i_auth.key);
344 vec_free (sa->r_auth.data);
346 EVP_PKEY_free (sa->r_auth.key);
350 vec_free (sa->rekey);
352 vec_free (sa->last_sa_init_req_packet_data);
353 vec_free (sa->last_sa_init_res_packet_data);
355 vec_free (sa->last_res_packet_data);
357 ikev2_sa_free_all_child_sa (&sa->childs);
361 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
365 ikev2_sa_free_all_vec (sa);
367 p = hash_get (ptd->sa_by_rspi, sa->rspi);
370 hash_unset (ptd->sa_by_rspi, sa->rspi);
371 pool_put (ptd->sas, sa);
375 static ikev2_generate_sa_error_t
376 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
378 ikev2_sa_transform_t *t = 0, *t2;
379 ikev2_main_t *km = &ikev2_main;
381 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
382 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
384 /* check if received DH group is on our list of supported groups */
385 vec_foreach (t2, km->supported_transforms)
387 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
396 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
397 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
400 if (sa->is_initiator)
403 RAND_bytes ((u8 *) & sa->ispi, 8);
406 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
407 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
412 RAND_bytes ((u8 *) & sa->rspi, 8);
415 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
416 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
419 /* generate dh keys */
420 ikev2_generate_dh (sa, t);
422 return IKEV2_GENERATE_SA_INIT_OK;
426 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
428 ikev2_sa_transform_t *t = 0, *t2;
429 ikev2_main_t *km = &ikev2_main;
431 /*move some data to the new SA */
432 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
433 sa->i_nonce = _(sai->i_nonce);
434 sa->i_dh_data = _(sai->i_dh_data);
435 sa->dh_private_key = _(sai->dh_private_key);
436 ip_address_copy (&sa->iaddr, &sai->iaddr);
437 ip_address_copy (&sa->raddr, &sai->raddr);
438 sa->is_initiator = sai->is_initiator;
439 sa->i_id.type = sai->i_id.type;
440 sa->r_id.type = sai->r_id.type;
441 sa->profile_index = sai->profile_index;
442 sa->tun_itf = sai->tun_itf;
443 sa->is_tun_itf_set = sai->is_tun_itf_set;
444 if (sai->natt_state == IKEV2_NATT_DISABLED)
445 sa->natt_state = IKEV2_NATT_DISABLED;
446 sa->i_id.data = _(sai->i_id.data);
447 sa->r_id.data = _(sai->r_id.data);
448 sa->i_auth.method = sai->i_auth.method;
449 sa->i_auth.hex = sai->i_auth.hex;
450 sa->i_auth.data = _(sai->i_auth.data);
451 sa->i_auth.key = _(sai->i_auth.key);
452 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
453 sa->last_init_msg_id = sai->last_init_msg_id;
454 sa->childs = _(sai->childs);
455 sa->udp_encap = sai->udp_encap;
456 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
457 sa->dst_port = sai->dst_port;
458 sa->sw_if_index = sai->sw_if_index;
462 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
467 /* check if received DH group is on our list of supported groups */
468 vec_foreach (t2, km->supported_transforms)
470 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
479 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
484 /* generate dh keys */
485 ikev2_complete_dh (sa, t);
490 ikev2_calc_keys (ikev2_sa_t * sa)
493 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
496 u16 integ_key_len = 0, salt_len = 0;
497 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
499 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
501 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
503 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
506 integ_key_len = tr_integ->key_len;
508 salt_len = sizeof (u32);
510 vec_append (s, sa->i_nonce);
511 vec_append (s, sa->r_nonce);
512 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
514 /* Calculate S = Ni | Nr | SPIi | SPIr */
516 vec_add2 (s, tmp, 2 * sizeof (*spi));
518 spi[0] = clib_host_to_net_u64 (sa->ispi);
519 spi[1] = clib_host_to_net_u64 (sa->rspi);
521 /* calculate PRFplus */
523 int len = tr_prf->key_trunc + /* SK_d */
524 integ_key_len * 2 + /* SK_ai, SK_ar */
525 tr_encr->key_len * 2 + /* SK_ei, SK_er */
526 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
529 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
536 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
537 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
538 pos += tr_prf->key_trunc;
543 sa->sk_ai = vec_new (u8, integ_key_len);
544 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
545 pos += integ_key_len;
548 sa->sk_ar = vec_new (u8, integ_key_len);
549 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
550 pos += integ_key_len;
554 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
555 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
556 pos += tr_encr->key_len + salt_len;
559 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
560 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
561 pos += tr_encr->key_len + salt_len;
564 sa->sk_pi = vec_new (u8, tr_prf->key_len);
565 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
566 pos += tr_prf->key_len;
569 sa->sk_pr = vec_new (u8, tr_prf->key_len);
570 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
571 pos += tr_prf->key_len;
574 sa->keys_generated = 1;
578 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
581 u16 integ_key_len = 0;
584 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
586 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
588 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
590 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
593 integ_key_len = ctr_integ->key_len;
595 salt_len = sizeof (u32);
597 vec_append (s, sa->i_nonce);
598 vec_append (s, sa->r_nonce);
599 /* calculate PRFplus */
601 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
603 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
608 child->sk_ei = vec_new (u8, ctr_encr->key_len);
609 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
610 pos += ctr_encr->key_len;
615 child->sk_ai = vec_new (u8, ctr_integ->key_len);
616 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
617 pos += ctr_integ->key_len;
621 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
626 child->sk_er = vec_new (u8, ctr_encr->key_len);
627 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
628 pos += ctr_encr->key_len;
633 child->sk_ar = vec_new (u8, integ_key_len);
634 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
635 pos += integ_key_len;
639 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
648 static_always_inline u8 *
649 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
651 const u32 max_buf_size =
652 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
653 u8 buf[max_buf_size];
654 u8 *res = vec_new (u8, 20);
656 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
657 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
658 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
659 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
660 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
665 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
668 const ike_ke_payload_header_t *ke = p;
669 u16 plen = clib_net_to_host_u16 (ke->length);
670 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
671 if (sizeof (*ke) > rlen)
674 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
675 vec_reset_length (ke_data[0]);
676 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
681 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
683 const ike_payload_header_t *ikep = p;
684 u16 plen = clib_net_to_host_u16 (ikep->length);
685 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
686 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
691 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
694 if (sizeof (*ikep) > rlen)
696 *plen = clib_net_to_host_u16 (ikep->length);
697 if (*plen < sizeof (*ikep) || *plen > rlen)
703 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
704 udp_header_t *udp, u32 len, u32 sw_if_index)
706 u8 nonce[IKEV2_NONCE_SIZE];
708 u8 payload = ike->nextpayload;
709 ike_payload_header_t *ikep;
712 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
713 "from ", clib_net_to_host_u64 (ike->ispi),
714 clib_net_to_host_u64 (ike->rspi),
715 ip_addr_v4 (&sa->iaddr).as_u32,
716 ip_addr_version (&sa->iaddr) == AF_IP4);
718 sa->ispi = clib_net_to_host_u64 (ike->ispi);
719 sa->sw_if_index = sw_if_index;
721 /* store whole IKE payload - needed for PSK auth */
722 vec_reset_length (sa->last_sa_init_req_packet_data);
723 vec_add (sa->last_sa_init_req_packet_data, ike, len);
725 if (len < sizeof (*ike))
728 len -= sizeof (*ike);
729 while (p < len && payload != IKEV2_PAYLOAD_NONE)
731 ikep = (ike_payload_header_t *) & ike->payload[p];
732 int current_length = len - p;
733 if (!ikev2_check_payload_length (ikep, current_length, &plen))
736 if (payload == IKEV2_PAYLOAD_SA)
738 ikev2_sa_free_proposal_vector (&sa->i_proposals);
739 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
741 else if (payload == IKEV2_PAYLOAD_KE)
743 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
747 else if (payload == IKEV2_PAYLOAD_NONCE)
749 vec_reset_length (sa->i_nonce);
750 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
751 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
753 else if (payload == IKEV2_PAYLOAD_NOTIFY)
756 ikev2_parse_notify_payload (ikep, current_length);
757 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
759 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
761 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
763 if (sa->natt_state == IKEV2_NATT_ENABLED)
764 sa->natt_state = IKEV2_NATT_ACTIVE;
765 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
766 " behind NAT", sa->ispi);
770 else if (n->msg_type ==
771 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
773 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
775 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
777 if (sa->natt_state == IKEV2_NATT_ENABLED)
778 sa->natt_state = IKEV2_NATT_ACTIVE;
779 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
780 " (self) behind NAT", sa->ispi);
786 else if (payload == IKEV2_PAYLOAD_VENDOR)
788 ikev2_parse_vendor_payload (ikep);
792 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
794 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
796 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
797 sa->unsupported_cp = payload;
802 payload = ikep->nextpayload;
806 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
811 ikev2_process_sa_init_resp (vlib_main_t * vm,
812 ikev2_sa_t * sa, ike_header_t * ike,
813 udp_header_t * udp, u32 len)
815 u8 nonce[IKEV2_NONCE_SIZE];
817 u8 payload = ike->nextpayload;
818 ike_payload_header_t *ikep;
821 sa->ispi = clib_net_to_host_u64 (ike->ispi);
822 sa->rspi = clib_net_to_host_u64 (ike->rspi);
824 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
825 "from ", sa->ispi, sa->rspi,
826 ip_addr_v4 (&sa->raddr).as_u32,
827 ip_addr_version (&sa->raddr) == AF_IP4);
829 /* store whole IKE payload - needed for PSK auth */
830 vec_reset_length (sa->last_sa_init_res_packet_data);
831 vec_add (sa->last_sa_init_res_packet_data, ike, len);
833 if (sizeof (*ike) > len)
836 len -= sizeof (*ike);
837 while (p < len && payload != IKEV2_PAYLOAD_NONE)
839 int current_length = len - p;
840 ikep = (ike_payload_header_t *) & ike->payload[p];
841 if (!ikev2_check_payload_length (ikep, current_length, &plen))
844 if (payload == IKEV2_PAYLOAD_SA)
846 ikev2_sa_free_proposal_vector (&sa->r_proposals);
847 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
850 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
852 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
855 else if (payload == IKEV2_PAYLOAD_KE)
857 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
861 else if (payload == IKEV2_PAYLOAD_NONCE)
863 vec_reset_length (sa->r_nonce);
864 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
865 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
867 else if (payload == IKEV2_PAYLOAD_NOTIFY)
870 ikev2_parse_notify_payload (ikep, current_length);
871 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
873 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
876 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
878 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
879 " behind NAT, unsupported", sa->ispi);
883 else if (n->msg_type ==
884 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
886 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
889 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
891 if (sa->natt_state == IKEV2_NATT_ENABLED)
892 sa->natt_state = IKEV2_NATT_ACTIVE;
893 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
894 " (self) behind NAT", sa->ispi);
900 else if (payload == IKEV2_PAYLOAD_VENDOR)
902 ikev2_parse_vendor_payload (ikep);
906 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
908 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
910 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
911 sa->unsupported_cp = payload;
916 payload = ikep->nextpayload;
922 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
923 u8 * payload, u32 rlen, u32 * out_len)
925 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
927 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
928 ike_payload_header_t *ikep = 0;
931 ikev2_sa_transform_t *tr_integ;
932 ikev2_sa_transform_t *tr_encr;
934 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
936 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
937 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
939 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
942 if (rlen <= sizeof (*ike))
945 int len = rlen - sizeof (*ike);
947 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
949 ikep = (ike_payload_header_t *) & ike->payload[p];
950 int current_length = len - p;
951 if (!ikev2_check_payload_length (ikep, current_length, &plen))
954 if (*payload == IKEV2_PAYLOAD_SK)
956 last_payload = *payload;
960 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
962 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
964 sa->unsupported_cp = *payload;
969 *payload = ikep->nextpayload;
973 if (last_payload != IKEV2_PAYLOAD_SK)
975 ikev2_elog_error ("Last payload must be SK");
981 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
984 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
985 u8 *aad = (u8 *) ike;
986 u32 aad_len = ikep->payload - aad;
987 u8 *tag = ikep->payload + plen;
989 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
990 plen, aad, aad_len, tag, &dlen);
994 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
999 if (rlen < tr_integ->key_trunc)
1003 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1004 (u8 *) ike, rlen - tr_integ->key_trunc);
1006 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1009 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1011 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1013 ikev2_elog_error ("message integrity check failed");
1019 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1024 plaintext = ikep->payload + tr_encr->block_size;
1031 static_always_inline int
1032 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1034 if (i1->type != i2->type)
1037 if (vec_len (i1->data) != vec_len (i2->data))
1040 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1047 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1050 ikev2_main_t *km = &ikev2_main;
1053 ikev2_child_sa_t *c;
1055 /* find old IKE SAs with the same authenticated identity */
1057 pool_foreach (tmp, ptd->sas) {
1058 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1059 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1062 if (sa->rspi != tmp->rspi)
1063 vec_add1(delete, tmp - ptd->sas);
1067 for (i = 0; i < vec_len (delete); i++)
1069 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1070 vec_foreach (c, tmp->childs)
1072 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1074 ikev2_delete_sa (ptd, tmp);
1078 sa->initial_contact = 0;
1082 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1085 ikev2_main_t *km = &ikev2_main;
1087 if (!sa->initial_contact)
1092 ikev2_initial_contact_cleanup_internal (ptd, sa);
1096 vec_foreach (ptd, km->per_thread_data)
1097 ikev2_initial_contact_cleanup_internal (ptd, sa);
1099 sa->initial_contact = 0;
1103 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1105 const ike_id_payload_header_t *id = p;
1106 u16 plen = clib_net_to_host_u16 (id->length);
1107 if (plen < sizeof (*id) || plen > rlen)
1110 sa_id->type = id->id_type;
1111 vec_reset_length (sa_id->data);
1112 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1118 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1120 const ike_auth_payload_header_t *ah = p;
1121 u16 plen = clib_net_to_host_u16 (ah->length);
1123 a->method = ah->auth_method;
1124 vec_reset_length (a->data);
1125 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1130 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1131 ike_header_t * ike, u32 len)
1134 ikev2_child_sa_t *first_child_sa;
1135 u8 payload = ike->nextpayload;
1137 ike_payload_header_t *ikep;
1141 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1142 "from ", clib_host_to_net_u64 (ike->ispi),
1143 clib_host_to_net_u64 (ike->rspi),
1145 ip_addr_v4 (&sa->raddr).as_u32 :
1146 ip_addr_v4 (&sa->iaddr).as_u32,
1147 ip_addr_version (&sa->raddr) == AF_IP4);
1149 ikev2_calc_keys (sa);
1151 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1155 if (sa->unsupported_cp)
1157 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1163 /* select or create 1st child SA */
1164 if (sa->is_initiator)
1166 first_child_sa = &sa->childs[0];
1170 ikev2_sa_free_all_child_sa (&sa->childs);
1171 vec_add2 (sa->childs, first_child_sa, 1);
1175 /* process encrypted payload */
1176 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1178 ikep = (ike_payload_header_t *) & plaintext[p];
1179 int current_length = dlen - p;
1180 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1183 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1185 if (sa->is_initiator)
1187 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1188 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1193 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1194 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1198 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1200 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1203 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1205 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1208 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1210 if (sa->is_initiator)
1212 if (!ikev2_parse_auth_payload (ikep, current_length,
1218 if (!ikev2_parse_auth_payload (ikep, current_length,
1223 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1226 ikev2_parse_notify_payload (ikep, current_length);
1227 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1229 sa->initial_contact = 1;
1233 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1235 ikev2_parse_vendor_payload (ikep);
1237 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1239 vec_free (first_child_sa->tsi);
1240 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1242 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1244 vec_free (first_child_sa->tsr);
1245 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1249 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1252 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1254 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1255 sa->unsupported_cp = payload;
1260 payload = ikep->nextpayload;
1267 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1272 ikev2_process_informational_req (vlib_main_t * vm,
1273 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1276 u8 payload = ike->nextpayload;
1278 ike_payload_header_t *ikep;
1280 ikev2_notify_t *n = 0;
1282 sa->liveness_retries = 0;
1283 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1284 "from ", clib_host_to_net_u64 (ike->ispi),
1285 clib_host_to_net_u64 (ike->rspi),
1286 ip_addr_v4 (&sa->iaddr).as_u32,
1287 ip_addr_version (&sa->iaddr) == AF_IP4);
1289 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1294 /* process encrypted payload */
1296 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1298 u32 current_length = dlen - p;
1299 if (p + sizeof (*ikep) > dlen)
1302 ikep = (ike_payload_header_t *) & plaintext[p];
1303 u16 plen = clib_net_to_host_u16 (ikep->length);
1305 if (plen < sizeof (*ikep) || plen > current_length)
1308 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1310 n = ikev2_parse_notify_payload (ikep, current_length);
1313 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1314 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1317 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1319 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1321 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1323 ikev2_parse_vendor_payload (ikep);
1327 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1329 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1331 sa->unsupported_cp = payload;
1335 payload = ikep->nextpayload;
1342 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1343 ikev2_sa_t * sa, ike_header_t * ike,
1347 u8 payload = ike->nextpayload;
1350 u8 nonce[IKEV2_NONCE_SIZE];
1352 ike_payload_header_t *ikep;
1353 ikev2_notify_t *n = 0;
1354 ikev2_ts_t *tsi = 0;
1355 ikev2_ts_t *tsr = 0;
1356 ikev2_sa_proposal_t *proposal = 0;
1357 ikev2_child_sa_t *child_sa;
1361 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1362 "from ", clib_host_to_net_u64 (ike->ispi),
1363 clib_host_to_net_u64 (ike->rspi),
1364 ip_addr_v4 (&sa->raddr).as_u32,
1365 ip_addr_version (&sa->raddr) == AF_IP4);
1367 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1370 goto cleanup_and_exit;
1372 /* process encrypted payload */
1374 while (payload != IKEV2_PAYLOAD_NONE)
1376 ikep = (ike_payload_header_t *) & plaintext[p];
1377 int current_length = dlen - p;
1378 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1379 goto cleanup_and_exit;
1381 if (payload == IKEV2_PAYLOAD_SA)
1383 proposal = ikev2_parse_sa_payload (ikep, current_length);
1385 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1387 n = ikev2_parse_notify_payload (ikep, current_length);
1388 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1393 else if (payload == IKEV2_PAYLOAD_DELETE)
1395 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1397 else if (payload == IKEV2_PAYLOAD_VENDOR)
1399 ikev2_parse_vendor_payload (ikep);
1401 else if (payload == IKEV2_PAYLOAD_NONCE)
1403 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1405 else if (payload == IKEV2_PAYLOAD_TSI)
1407 tsi = ikev2_parse_ts_payload (ikep, current_length);
1409 else if (payload == IKEV2_PAYLOAD_TSR)
1411 tsr = ikev2_parse_ts_payload (ikep, current_length);
1415 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1417 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1419 sa->unsupported_cp = payload;
1420 goto cleanup_and_exit;
1423 payload = ikep->nextpayload;
1427 if (sa->is_initiator && proposal
1428 && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1430 ikev2_rekey_t *rekey = sa->rekey;
1431 if (vec_len (rekey) == 0)
1432 goto cleanup_and_exit;
1433 rekey->protocol_id = proposal->protocol_id;
1435 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1436 rekey->i_proposal->spi = rekey->spi;
1437 rekey->r_proposal = proposal;
1441 vec_reset_length (sa->r_nonce);
1442 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1443 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1446 child_sa->rekey_retries = 0;
1451 ikev2_rekey_t *rekey;
1452 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1455 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1457 goto cleanup_and_exit;
1459 vec_add2 (sa->rekey, rekey, 1);
1460 rekey->protocol_id = n->protocol_id;
1461 rekey->spi = n->spi;
1462 rekey->i_proposal = proposal;
1464 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1468 vec_reset_length (sa->i_nonce);
1469 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1470 /* generate new Nr */
1471 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1472 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1475 goto cleanup_and_exit;
1481 vec_free (proposal);
1488 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1496 ikev2_sa_transform_t *tr_prf;
1499 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1505 nonce = sa->i_nonce;
1506 packet_data = sa->last_sa_init_res_packet_data;
1512 nonce = sa->r_nonce;
1513 packet_data = sa->last_sa_init_req_packet_data;
1516 data = vec_new (u8, 4);
1518 vec_append (data, id->data);
1520 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1521 vec_append (authmsg, packet_data);
1522 vec_append (authmsg, nonce);
1523 vec_append (authmsg, id_hash);
1531 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1533 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1534 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1535 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1536 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1543 ikev2_sa_match_ts (ikev2_sa_t * sa)
1545 ikev2_main_t *km = &ikev2_main;
1547 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1548 ikev2_id_t *id_rem, *id_loc;
1551 pool_foreach (p, km->profiles) {
1553 if (sa->is_initiator)
1569 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1570 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1573 sa->profile_index = p - km->profiles;
1575 vec_foreach(ts, sa->childs[0].tsi)
1577 if (ikev2_ts_cmp(p_tsi, ts))
1579 vec_add1 (tsi, ts[0]);
1584 vec_foreach(ts, sa->childs[0].tsr)
1586 if (ikev2_ts_cmp(p_tsr, ts))
1588 vec_add1 (tsr, ts[0]);
1599 vec_free (sa->childs[0].tsi);
1600 vec_free (sa->childs[0].tsr);
1601 sa->childs[0].tsi = tsi;
1602 sa->childs[0].tsr = tsr;
1608 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1613 ikev2_sa_auth (ikev2_sa_t * sa)
1615 ikev2_main_t *km = &ikev2_main;
1616 ikev2_profile_t *p, *sel_p = 0;
1617 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1618 ikev2_sa_transform_t *tr_prf;
1621 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1623 /* only shared key and rsa signature */
1624 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1625 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1627 ikev2_elog_uint (IKEV2_LOG_ERROR,
1628 "unsupported authentication method %u",
1630 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1634 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1635 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1637 ikev2_id_t *id_rem, *id_loc;
1638 ikev2_auth_t *sa_auth;
1640 if (sa->is_initiator)
1644 sa_auth = &sa->r_auth;
1650 sa_auth = &sa->i_auth;
1654 pool_foreach (p, km->profiles) {
1657 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1658 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1661 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1663 if (!p->auth.data ||
1664 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1667 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1668 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1670 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1672 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1679 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1681 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1684 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1686 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1699 sa->udp_encap = sel_p->udp_encap;
1700 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1704 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1706 if (!sa->is_initiator)
1708 vec_free (sa->r_id.data);
1709 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1710 sa->r_id.type = sel_p->loc_id.type;
1711 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1712 sa->i_id.type = sel_p->rem_id.type;
1714 /* generate our auth data */
1715 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1716 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1718 vec_free (sa->r_auth.data);
1719 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1720 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1722 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1724 vec_free (sa->r_auth.data);
1725 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1726 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1730 /* select transforms for 1st child sa */
1731 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1732 sa->childs[0].r_proposals =
1733 ikev2_select_proposal (sa->childs[0].i_proposals,
1734 IKEV2_PROTOCOL_ESP);
1736 if (~0 != sel_p->tun_itf)
1738 sa->is_tun_itf_set = 1;
1739 sa->tun_itf = sel_p->tun_itf;
1745 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1746 "profile found! ispi %lx", sa->ispi);
1747 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1755 ikev2_sa_auth_init (ikev2_sa_t * sa)
1757 ikev2_main_t *km = &ikev2_main;
1758 u8 *authmsg, *key_pad, *psk = 0;
1759 ikev2_sa_transform_t *tr_prf;
1762 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1764 /* only shared key and rsa signature */
1765 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1766 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1768 ikev2_elog_uint (IKEV2_LOG_ERROR,
1769 "unsupported authentication method %u",
1771 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1775 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1776 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1777 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1779 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1781 vec_free (sa->i_auth.data);
1782 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1783 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1785 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1787 vec_free (sa->i_auth.data);
1788 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1789 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1798 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1800 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1804 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1806 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1816 ipsec_sa_flags_t flags;
1819 ipsec_crypto_alg_t encr_type;
1820 ipsec_integ_alg_t integ_type;
1821 ip46_address_t local_ip;
1822 ip46_address_t remote_ip;
1823 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1825 u32 old_remote_sa_id;
1826 u16 ipsec_over_udp_port;
1829 } ikev2_add_ipsec_tunnel_args_t;
1832 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1834 ikev2_main_t *km = &ikev2_main;
1838 if (~0 == a->sw_if_index)
1840 /* no tunnel associated with the SA/profile - create a new one */
1841 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1842 &a->local_ip, &a->remote_ip, 0,
1843 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1844 TUNNEL_MODE_P2P, &sw_if_index);
1846 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1848 if (hash_get (km->sw_if_indices, sw_if_index))
1849 /* interface is managed by IKE; proceed with updating SAs */
1852 hash_set1 (km->sw_if_indices, sw_if_index);
1856 sw_if_index = a->sw_if_index;
1857 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1862 ikev2_elog_uint (IKEV2_LOG_ERROR,
1863 "installing ipip tunnel failed! local spi: %x",
1869 vec_add1 (sas_in, a->remote_sa_id);
1872 ipsec_tun_protect_del (sw_if_index, NULL);
1874 /* replace local SA immediately */
1875 ipsec_sa_unlock_id (a->local_sa_id);
1877 /* keep the old sa */
1878 vec_add1 (sas_in, a->old_remote_sa_id);
1881 rv = ipsec_sa_add_and_lock (a->local_sa_id,
1883 IPSEC_PROTOCOL_ESP, a->encr_type,
1884 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1885 a->flags, 0, a->salt_local, &a->local_ip,
1886 &a->remote_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1887 IP_DSCP_CS0, NULL, a->src_port, a->dst_port);
1891 rv = ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1892 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1893 a->integ_type, &a->rem_ikey,
1894 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1895 a->salt_remote, &a->remote_ip,
1896 &a->local_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1898 a->ipsec_over_udp_port, a->ipsec_over_udp_port);
1902 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1909 ipsec_sa_unlock_id (a->remote_sa_id);
1911 ipsec_sa_unlock_id (a->local_sa_id);
1917 ikev2_create_tunnel_interface (vlib_main_t * vm,
1919 ikev2_child_sa_t * child, u32 sa_index,
1920 u32 child_index, u8 is_rekey)
1922 u32 thread_index = vlib_get_thread_index ();
1923 ikev2_main_t *km = &ikev2_main;
1924 ipsec_crypto_alg_t encr_type;
1925 ipsec_integ_alg_t integ_type;
1926 ikev2_profile_t *p = 0;
1927 ikev2_sa_transform_t *tr;
1928 ikev2_sa_proposal_t *proposals;
1930 ikev2_add_ipsec_tunnel_args_t a;
1932 clib_memset (&a, 0, sizeof (a));
1934 if (!child->r_proposals)
1936 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1940 if (sa->is_initiator)
1942 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1943 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1944 proposals = child->r_proposals;
1945 a.local_spi = child->r_proposals[0].spi;
1946 a.remote_spi = child->i_proposals[0].spi;
1950 ip_address_to_46 (&sa->raddr, &a.local_ip);
1951 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1952 proposals = child->i_proposals;
1953 a.local_spi = child->i_proposals[0].spi;
1954 a.remote_spi = child->r_proposals[0].spi;
1957 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1960 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1961 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1963 if (ikev2_natt_active (sa))
1964 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1965 a.is_rekey = is_rekey;
1967 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1968 if (tr && tr->esn_type)
1969 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1971 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1974 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1976 switch (tr->key_len)
1979 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1982 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1985 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1988 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1993 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
1996 switch (tr->key_len)
1999 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2002 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2005 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2008 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2016 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2022 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2025 a.encr_type = encr_type;
2029 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2032 switch (tr->integ_type)
2034 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2035 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2037 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2038 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2040 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2041 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2043 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2044 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2047 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2053 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2059 integ_type = IPSEC_INTEG_ALG_NONE;
2062 a.integ_type = integ_type;
2063 ikev2_calc_child_keys (sa, child);
2065 if (sa->is_initiator)
2067 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2068 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2069 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2070 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2073 a.salt_remote = child->salt_er;
2074 a.salt_local = child->salt_ei;
2076 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2080 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2081 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2082 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2083 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2086 a.salt_remote = child->salt_ei;
2087 a.salt_local = child->salt_er;
2090 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2091 a.src_port = sa->ipsec_over_udp_port;
2094 if (sa->is_initiator && sa->profile_index != ~0)
2095 p = pool_elt_at_index (km->profiles, sa->profile_index);
2097 if (p && p->lifetime)
2099 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2100 if (p->lifetime_jitter)
2102 // This is not much better than rand(3), which Coverity warns
2103 // is unsuitable for security applications; random_u32 is
2104 // however fast. If this perturbance to the expiration time
2105 // needs to use a better RNG then we may need to use something
2106 // like /dev/urandom which has significant overhead.
2107 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2108 rnd = random_u32 (&rnd);
2110 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2114 if (thread_index & 0xffffffc0)
2115 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2117 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2118 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2120 child->local_sa_id =
2122 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2124 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2129 /* create a new remote SA ID to keep the old SA for a bit longer
2130 * so the peer has some time to swap their SAs */
2132 /* use most significat bit of child index part in id */
2134 if (sa->current_remote_id_mask)
2136 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2137 sa->current_remote_id_mask = 0;
2141 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2142 sa->current_remote_id_mask = mask;
2143 remote_sa_id |= mask;
2145 sa->old_id_expiration = 3.0;
2146 sa->old_remote_id_present = 1;
2149 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2151 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2152 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2154 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2155 (u8 *) & a, sizeof (a));
2161 ip46_address_t local_ip;
2162 ip46_address_t remote_ip;
2166 } ikev2_del_ipsec_tunnel_args_t;
2168 static_always_inline u32
2169 ikev2_flip_alternate_sa_bit (u32 id)
2178 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2180 ikev2_main_t *km = &ikev2_main;
2181 ipip_tunnel_t *ipip = NULL;
2184 if (~0 == a->sw_if_index)
2187 ipip_tunnel_key_t key = {
2189 .dst = a->remote_ip,
2190 .transport = IPIP_TRANSPORT_IP4,
2195 ipip = ipip_tunnel_db_find (&key);
2199 sw_if_index = ipip->sw_if_index;
2200 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2207 sw_if_index = a->sw_if_index;
2208 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2211 if (~0 != sw_if_index)
2212 ipsec_tun_protect_del (sw_if_index, NULL);
2214 ipsec_sa_unlock_id (a->remote_sa_id);
2215 ipsec_sa_unlock_id (a->local_sa_id);
2216 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2219 ipip_del_tunnel (ipip->sw_if_index);
2223 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2224 ikev2_child_sa_t * child)
2226 ikev2_del_ipsec_tunnel_args_t a;
2228 clib_memset (&a, 0, sizeof (a));
2230 if (sa->is_initiator)
2232 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2233 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2237 ip_address_to_46 (&sa->raddr, &a.local_ip);
2238 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2241 a.remote_sa_id = child->remote_sa_id;
2242 a.local_sa_id = child->local_sa_id;
2243 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2245 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2251 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2252 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2254 ikev2_main_t *km = &ikev2_main;
2255 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2257 ike_payload_header_t *ph;
2261 ikev2_sa_transform_t *tr_encr, *tr_integ;
2263 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2265 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2267 ikev2_payload_chain_t *chain = 0;
2268 ikev2_payload_new_chain (chain);
2270 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2272 if (sa->r_proposals == 0)
2274 ikev2_payload_add_notify (chain,
2275 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2276 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2278 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2280 u8 *data = vec_new (u8, 2);
2281 ikev2_sa_transform_t *tr_dh;
2283 ikev2_sa_get_td_for_type (sa->r_proposals,
2284 IKEV2_TRANSFORM_TYPE_DH);
2285 ASSERT (tr_dh && tr_dh->dh_type);
2287 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2288 data[1] = (tr_dh->dh_type) & 0xff;
2290 ikev2_payload_add_notify (chain,
2291 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2294 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2296 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2298 u8 *data = vec_new (u8, 1);
2300 data[0] = sa->unsupported_cp;
2301 ikev2_payload_add_notify (chain,
2302 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2310 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2311 ikev2_payload_add_sa (chain, sa->r_proposals);
2312 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2313 ikev2_payload_add_nonce (chain, sa->r_nonce);
2315 u8 *nat_detection_sha1 =
2316 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2317 clib_host_to_net_u64 (sa->rspi),
2318 &sa->raddr, udp->dst_port);
2319 ikev2_payload_add_notify (chain,
2320 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2321 nat_detection_sha1);
2322 vec_free (nat_detection_sha1);
2323 nat_detection_sha1 =
2324 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2325 clib_host_to_net_u64 (sa->rspi),
2326 &sa->iaddr, udp->src_port);
2327 ikev2_payload_add_notify (chain,
2328 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2329 nat_detection_sha1);
2330 vec_free (nat_detection_sha1);
2333 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2335 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2337 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2338 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2339 ikev2_payload_add_auth (chain, &sa->r_auth);
2340 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2341 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2342 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2344 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2346 ikev2_payload_add_notify (chain,
2347 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2349 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2351 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2353 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2355 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2356 ikev2_payload_add_auth (chain, &sa->r_auth);
2358 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2360 ikev2_payload_add_notify (chain,
2361 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2362 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2363 ikev2_payload_add_auth (chain, &sa->r_auth);
2364 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2365 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2367 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2369 u8 *data = vec_new (u8, 1);
2371 data[0] = sa->unsupported_cp;
2372 ikev2_payload_add_notify (chain,
2373 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2377 else if (sa->state == IKEV2_STATE_SA_INIT)
2379 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2380 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2381 ikev2_payload_add_auth (chain, &sa->i_auth);
2382 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2383 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2384 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2385 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2390 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2394 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2396 /* if pending delete */
2399 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2401 if (ike_hdr_is_request (ike))
2402 ikev2_payload_add_delete (chain, sa->del);
2404 /* The response to a request that deletes the IKE SA is an empty
2405 INFORMATIONAL response. */
2406 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2408 /* The response to a request that deletes ESP or AH SAs will contain
2409 delete payloads for the paired SAs going in the other direction. */
2412 ikev2_payload_add_delete (chain, sa->del);
2417 /* received N(AUTHENTICATION_FAILED) */
2418 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2420 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2423 /* received unsupported critical payload */
2424 else if (sa->unsupported_cp)
2426 u8 *data = vec_new (u8, 1);
2428 data[0] = sa->unsupported_cp;
2429 ikev2_payload_add_notify (chain,
2430 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2433 sa->unsupported_cp = 0;
2436 /* else send empty response */
2438 if (ike_hdr_is_response (ike))
2440 ASSERT (stats != 0);
2441 stats->n_keepalives++;
2445 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2447 if (sa->is_initiator)
2450 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2451 ikev2_notify_t notify;
2452 u8 *data = vec_new (u8, 4);
2453 clib_memset (¬ify, 0, sizeof (notify));
2454 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2455 notify.spi = sa->childs[0].i_proposals->spi;
2456 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2458 ikev2_payload_add_sa (chain, proposals);
2459 ikev2_payload_add_nonce (chain, sa->i_nonce);
2460 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2461 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2462 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2469 if (vec_len (sa->rekey) > 0)
2471 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2472 ikev2_payload_add_nonce (chain, sa->r_nonce);
2473 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2475 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2477 vec_del1 (sa->rekey, 0);
2479 else if (sa->unsupported_cp)
2481 u8 *data = vec_new (u8, 1);
2483 data[0] = sa->unsupported_cp;
2484 ikev2_payload_add_notify (chain,
2485 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2488 sa->unsupported_cp = 0;
2492 ikev2_payload_add_notify (chain,
2493 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2500 ike->version = IKE_VERSION_2;
2501 ike->nextpayload = IKEV2_PAYLOAD_SK;
2502 tlen = sizeof (*ike);
2504 if (sa->is_initiator)
2505 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2507 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2509 tlen += vec_len (chain->data);
2510 ike->nextpayload = chain->first_payload_type;
2511 ike->length = clib_host_to_net_u32 (tlen);
2513 if (tlen + b->current_length + b->current_data > buffer_data_size)
2519 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2521 /* store whole IKE payload - needed for PSK auth */
2522 vec_reset_length (sa->last_sa_init_res_packet_data);
2523 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2527 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2528 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2531 plen = sizeof (*ph);
2532 ph = (ike_payload_header_t *) & ike->payload[0];
2533 ph->nextpayload = chain->first_payload_type;
2536 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2537 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2538 plen += vec_len (chain->data) + iv_len;
2540 /* add space for hmac/tag */
2542 plen += tr_integ->key_trunc;
2544 plen += IKEV2_GCM_ICV_SIZE;
2547 if (tlen + b->current_length + b->current_data > buffer_data_size)
2553 /* payload and total length */
2554 ph->length = clib_host_to_net_u16 (plen);
2555 ike->length = clib_host_to_net_u32 (tlen);
2559 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2560 ph->payload, (u8 *) ike,
2561 sizeof (*ike) + sizeof (*ph),
2562 ph->payload + plen - sizeof (*ph) -
2563 IKEV2_GCM_ICV_SIZE))
2571 if (!ikev2_encrypt_data
2572 (ptd, sa, tr_encr, chain->data, ph->payload))
2578 ikev2_calc_integr (tr_integ,
2579 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2580 (u8 *) ike, tlen - tr_integ->key_trunc);
2581 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2582 sizeof (*ike), integ, tr_integ->key_trunc);
2585 /* store whole IKE payload - needed for retransmit */
2586 vec_reset_length (sa->last_res_packet_data);
2587 vec_add (sa->last_res_packet_data, ike, tlen);
2591 ikev2_payload_destroy_chain (chain);
2597 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2598 ip_address_t iaddr, ip_address_t raddr,
2603 u8 payload = ike->nextpayload;
2605 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2606 ip_address_cmp (&sa->iaddr, &iaddr) ||
2607 ip_address_cmp (&sa->raddr, &raddr))
2612 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2614 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2615 u32 plen = clib_net_to_host_u16 (ikep->length);
2617 if (plen < sizeof (ike_payload_header_t))
2620 if (payload == IKEV2_PAYLOAD_NONCE &&
2621 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2623 /* req is retransmit */
2624 if (sa->state == IKEV2_STATE_SA_INIT)
2626 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2627 u32 slen = clib_net_to_host_u32 (tmp->length);
2628 ike->ispi = tmp->ispi;
2629 ike->rspi = tmp->rspi;
2630 ike->nextpayload = tmp->nextpayload;
2631 ike->version = tmp->version;
2632 ike->exchange = tmp->exchange;
2633 ike->flags = tmp->flags;
2634 ike->msgid = tmp->msgid;
2635 ike->length = tmp->length;
2636 clib_memcpy_fast (ike->payload, tmp->payload,
2637 slen - sizeof (*ike));
2638 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2639 "ispi %lx IKE_SA_INIT retransmit "
2640 "from %d.%d.%d.%d to %d.%d.%d.%d",
2642 ip_addr_v4 (&raddr).as_u32,
2643 ip_addr_v4 (&iaddr).as_u32);
2646 /* else ignore req */
2649 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2650 "ispi %lx IKE_SA_INIT ignore "
2651 "from %d.%d.%d.%d to %d.%d.%d.%d",
2653 ip_addr_v4 (&raddr).as_u32,
2654 ip_addr_v4 (&iaddr).as_u32);
2658 payload = ikep->nextpayload;
2666 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2667 ip_address_t raddr, u32 rlen)
2671 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2674 pool_foreach (sa, ptd->sas) {
2675 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2681 /* req is not retransmit */
2686 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2688 if (ike_hdr_is_response (ike))
2691 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2694 if (msg_id > sa->last_msg_id)
2696 sa->last_msg_id = msg_id;
2700 /* retransmitted req */
2701 if (msg_id == sa->last_msg_id)
2703 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2704 u32 slen = clib_net_to_host_u32 (tmp->length);
2705 ike->ispi = tmp->ispi;
2706 ike->rspi = tmp->rspi;
2707 ike->nextpayload = tmp->nextpayload;
2708 ike->version = tmp->version;
2709 ike->exchange = tmp->exchange;
2710 ike->flags = tmp->flags;
2711 ike->msgid = tmp->msgid;
2712 ike->length = tmp->length;
2713 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2714 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2715 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2716 ip_addr_v4 (&sa->iaddr).as_u32);
2720 /* old req ignore */
2721 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2722 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2723 ip_addr_v4 (&sa->iaddr).as_u32);
2728 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2730 ikev2_main_t *km = &ikev2_main;
2731 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2732 sa->profile_index = ~0;
2736 ikev2_del_sa_init_from_main (u64 * ispi)
2738 ikev2_main_t *km = &ikev2_main;
2739 uword *p = hash_get (km->sa_by_ispi, *ispi);
2742 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2743 hash_unset (km->sa_by_ispi, sai->ispi);
2744 ikev2_sa_free_all_vec (sai);
2745 pool_put (km->sais, sai);
2750 ikev2_del_sa_init (u64 ispi)
2752 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2756 static_always_inline void
2757 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2759 if (sa->is_initiator)
2761 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2762 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2766 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2767 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2771 static_always_inline void
2772 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2774 if (sa->is_initiator)
2776 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2777 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2781 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2782 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2786 static_always_inline void
2787 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2788 const ip_address_family_t af)
2790 ip_address_set (&sa->raddr, raddr, af);
2791 ip_address_set (&sa->iaddr, iaddr, af);
2795 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2796 ip6_header_t * ip6, u8 is_ip4)
2801 src = ip4->src_address.as_u32;
2802 dst = ip4->dst_address.as_u32;
2806 src = ip6->src_address.as_u32[3];
2807 dst = ip6->dst_address.as_u32[3];
2809 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2810 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2811 exchange, src, dst);
2815 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2817 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2819 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2822 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2823 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2824 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2825 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2829 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2831 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2833 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2835 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_EXCHANGE_SA_REQ,
2836 s->n_exchange_sa_req);
2837 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2841 static_always_inline uword
2842 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2843 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2845 u32 n_left = frame->n_vectors, *from;
2846 ikev2_main_t *km = &ikev2_main;
2847 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2848 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2849 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2850 ikev2_stats_t _stats, *stats = &_stats;
2853 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2854 from = vlib_frame_vector_args (frame);
2855 vlib_get_buffers (vm, from, bufs, n_left);
2860 vlib_buffer_t *b0 = b[0];
2861 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2862 : IKEV2_NEXT_IP6_ERROR_DROP;
2863 ip4_header_t *ip40 = 0;
2864 ip6_header_t *ip60 = 0;
2867 ikev2_sa_t *sa0 = 0;
2868 ikev2_sa_t sa; /* temporary store for SA */
2875 u8 *ptr = vlib_buffer_get_current (b0);
2876 ip40 = (ip4_header_t *) ptr;
2877 ptr += sizeof (*ip40);
2878 udp0 = (udp_header_t *) ptr;
2879 ptr += sizeof (*udp0);
2880 ike0 = (ike_header_t *) ptr;
2881 ip_hdr_sz = sizeof (*ip40);
2885 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2886 ike0 = vlib_buffer_get_current (b0);
2887 vlib_buffer_advance (b0, -sizeof (*udp0));
2888 udp0 = vlib_buffer_get_current (b0);
2892 ip40 = (ip4_header_t *) ipx_hdr;
2893 ip_hdr_sz = sizeof (*ip40);
2897 ip60 = (ip6_header_t *) ipx_hdr;
2898 ip_hdr_sz = sizeof (*ip60);
2900 vlib_buffer_advance (b0, -ip_hdr_sz);
2903 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2905 /* check for non-esp marker */
2908 ASSERT (*((u32 *) ike0) == 0);
2910 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2911 rlen -= sizeof (ikev2_non_esp_marker);
2914 if (clib_net_to_host_u32 (ike0->length) != rlen)
2916 vlib_node_increment_counter (vm, node->node_index,
2917 IKEV2_ERROR_BAD_LENGTH, 1);
2921 if (ike0->version != IKE_VERSION_2)
2923 vlib_node_increment_counter (vm, node->node_index,
2924 IKEV2_ERROR_NOT_IKEV2, 1);
2928 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2931 clib_memset (sa0, 0, sizeof (*sa0));
2933 if (ike_hdr_is_initiator (ike0))
2935 stats->n_exchange_sa_req++;
2936 if (ike0->rspi == 0)
2939 ikev2_set_ip_address (sa0, &ip40->src_address,
2940 &ip40->dst_address, AF_IP4);
2942 ikev2_set_ip_address (sa0, &ip60->src_address,
2943 &ip60->dst_address, AF_IP6);
2945 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2948 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2952 vlib_node_increment_counter (vm, node->node_index,
2955 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2957 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2962 res = ikev2_process_sa_init_req (
2963 vm, sa0, ike0, udp0, rlen,
2964 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
2966 vlib_node_increment_counter (vm, node->node_index,
2967 IKEV2_ERROR_MALFORMED_PACKET,
2970 if (sa0->state == IKEV2_STATE_SA_INIT)
2972 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2974 ikev2_select_proposal (sa0->i_proposals,
2975 IKEV2_PROTOCOL_IKE);
2976 ikev2_generate_sa_init_data_and_log (sa0);
2979 if (sa0->state == IKEV2_STATE_SA_INIT
2980 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2982 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
2984 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
2986 vlib_node_increment_counter (vm, node->node_index,
2987 IKEV2_ERROR_NO_BUFF_SPACE,
2991 if (sa0->state == IKEV2_STATE_SA_INIT)
2993 /* add SA to the pool */
2994 pool_get (ptd->sas, sa0);
2995 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2996 ikev2_init_sa (vm, sa0);
2997 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3001 ikev2_sa_free_all_vec (sa0);
3005 else //received sa_init without initiator flag
3008 ikev2_set_ip_address (sa0, &ip40->dst_address,
3009 &ip40->src_address, AF_IP4);
3011 ikev2_set_ip_address (sa0, &ip60->dst_address,
3012 &ip60->src_address, AF_IP6);
3014 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3016 if (sa0->state == IKEV2_STATE_SA_INIT)
3019 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3020 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3023 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3025 if (clib_atomic_bool_cmp_and_swap
3026 (&sai->init_response_received, 0, 1))
3028 ikev2_complete_sa_data (sa0, sai);
3029 ikev2_calc_keys (sa0);
3030 ikev2_sa_auth_init (sa0);
3031 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3033 clib_net_to_host_u32 (sai->last_init_msg_id);
3034 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3035 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3038 vlib_node_increment_counter (vm,
3040 IKEV2_ERROR_NO_BUFF_SPACE,
3045 /* we've already processed sa-init response */
3046 sa0->state = IKEV2_STATE_UNKNOWN;
3051 if (sa0->state == IKEV2_STATE_SA_INIT)
3053 /* add SA to the pool */
3054 pool_get (ptd->sas, sa0);
3055 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3056 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3060 ikev2_sa_free_all_vec (sa0);
3064 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3067 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3070 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3071 slen = ikev2_retransmit_resp (sa0, ike0);
3074 vlib_node_increment_counter (vm, node->node_index,
3077 IKEV2_ERROR_IKE_REQ_IGNORE
3079 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3084 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3085 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3087 ikev2_sa_auth (sa0);
3089 vlib_node_increment_counter (vm, node->node_index,
3090 IKEV2_ERROR_MALFORMED_PACKET, 1);
3091 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3093 ikev2_initial_contact_cleanup (ptd, sa0);
3094 ikev2_sa_match_ts (sa0);
3095 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3096 ikev2_create_tunnel_interface (vm, sa0,
3101 if (sa0->is_initiator)
3103 ikev2_del_sa_init (sa0->ispi);
3107 stats->n_ike_auth_req++;
3108 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3110 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3112 vlib_node_increment_counter (vm, node->node_index,
3113 IKEV2_ERROR_NO_BUFF_SPACE,
3118 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3121 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3124 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3125 slen = ikev2_retransmit_resp (sa0, ike0);
3128 vlib_node_increment_counter (vm, node->node_index,
3131 IKEV2_ERROR_IKE_REQ_IGNORE
3133 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3138 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3141 vlib_node_increment_counter (vm, node->node_index,
3142 IKEV2_ERROR_MALFORMED_PACKET,
3150 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3152 ikev2_delete_t *d, *tmp, *resp = 0;
3153 vec_foreach (d, sa0->del)
3155 ikev2_child_sa_t *ch_sa;
3156 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3158 !sa0->is_initiator);
3161 ikev2_delete_tunnel_interface (km->vnet_main,
3163 if (!sa0->is_initiator)
3165 vec_add2 (resp, tmp, 1);
3166 tmp->protocol_id = d->protocol_id;
3167 tmp->spi = ch_sa->r_proposals[0].spi;
3169 ikev2_sa_del_child_sa (sa0, ch_sa);
3172 if (!sa0->is_initiator)
3174 vec_free (sa0->del);
3179 if (ike_hdr_is_request (ike0))
3181 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3183 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3185 vlib_node_increment_counter (vm, node->node_index,
3186 IKEV2_ERROR_NO_BUFF_SPACE,
3191 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3194 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3197 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3198 slen = ikev2_retransmit_resp (sa0, ike0);
3201 vlib_node_increment_counter (vm, node->node_index,
3204 IKEV2_ERROR_IKE_REQ_IGNORE
3206 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3211 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3214 vlib_node_increment_counter (vm, node->node_index,
3215 IKEV2_ERROR_MALFORMED_PACKET,
3223 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3226 ikev2_sa_free_all_child_sa (&sa0->childs);
3227 ikev2_child_sa_t *child;
3228 vec_add2 (sa0->childs, child, 1);
3229 clib_memset (child, 0, sizeof (*child));
3230 child->r_proposals = sa0->rekey[0].r_proposal;
3231 child->i_proposals = sa0->rekey[0].i_proposal;
3232 child->tsi = sa0->rekey[0].tsi;
3233 child->tsr = sa0->rekey[0].tsr;
3234 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3235 child - sa0->childs, 1);
3237 if (ike_hdr_is_response (ike0))
3239 vec_free (sa0->rekey);
3243 stats->n_rekey_req++;
3244 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3246 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3248 vlib_node_increment_counter (vm, node->node_index,
3249 IKEV2_ERROR_NO_BUFF_SPACE,
3257 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3261 /* if we are sending packet back, rewrite headers */
3262 if (slen && ~0 != slen)
3266 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3267 ikev2_rewrite_v4_addrs (sa0, ip40);
3271 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3272 ikev2_rewrite_v6_addrs (sa0, ip60);
3277 udp0->dst_port = udp0->src_port =
3278 clib_net_to_host_u16 (ikev2_get_port (sa0));
3280 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3281 && ikev2_natt_active (sa0))
3284 slen = ikev2_insert_non_esp_marker (ike0, slen);
3290 slen += sizeof (ikev2_non_esp_marker);
3292 u16 tp = udp0->dst_port;
3293 udp0->dst_port = udp0->src_port;
3294 udp0->src_port = tp;
3297 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3299 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3302 ip40->length = clib_host_to_net_u16 (b0->current_length);
3303 ip40->checksum = ip4_header_checksum (ip40);
3307 ip60->payload_length =
3308 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3312 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3313 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3315 ikev2_child_sa_t *c;
3317 vec_foreach (c, sa0->childs)
3318 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3320 ikev2_delete_sa (ptd, sa0);
3322 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3323 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3326 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3327 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3328 t->next_index = next[0];
3335 ikev2_update_stats (vm, node->node_index, stats);
3336 vlib_node_increment_counter (vm, node->node_index,
3337 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3338 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3339 return frame->n_vectors;
3343 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3345 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3349 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3350 vlib_frame_t *frame)
3352 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3356 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3358 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3362 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3363 .function = ikev2_ip4,
3364 .name = "ikev2-ip4",
3365 .vector_size = sizeof (u32),
3366 .format_trace = format_ikev2_trace,
3367 .type = VLIB_NODE_TYPE_INTERNAL,
3369 .n_errors = IKEV2_N_ERROR,
3370 .error_counters = ikev2_error_counters,
3372 .n_next_nodes = IKEV2_IP4_N_NEXT,
3374 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3375 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3379 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3380 .function = ikev2_ip4_natt,
3381 .name = "ikev2-ip4-natt",
3382 .vector_size = sizeof (u32),
3383 .format_trace = format_ikev2_trace,
3384 .type = VLIB_NODE_TYPE_INTERNAL,
3386 .n_errors = IKEV2_N_ERROR,
3387 .error_counters = ikev2_error_counters,
3389 .n_next_nodes = IKEV2_IP4_N_NEXT,
3391 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3392 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3396 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3397 .function = ikev2_ip6,
3398 .name = "ikev2-ip6",
3399 .vector_size = sizeof (u32),
3400 .format_trace = format_ikev2_trace,
3401 .type = VLIB_NODE_TYPE_INTERNAL,
3403 .n_errors = IKEV2_N_ERROR,
3404 .error_counters = ikev2_error_counters,
3406 .n_next_nodes = IKEV2_IP6_N_NEXT,
3408 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3409 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3414 // set ikev2 proposals when vpp is used as initiator
3415 static clib_error_t *
3416 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3417 ikev2_transforms_set * ts,
3418 ikev2_sa_proposal_t ** proposals, int is_ike)
3421 ikev2_main_t *km = &ikev2_main;
3422 ikev2_sa_proposal_t *proposal;
3423 vec_add2 (*proposals, proposal, 1);
3424 ikev2_sa_transform_t *td;
3429 vec_foreach (td, km->supported_transforms)
3431 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3432 && td->encr_type == ts->crypto_alg
3433 && td->key_len == ts->crypto_key_size / 8)
3436 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3437 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3438 vec_add (td->attrs, (u8 *) attr, 4);
3439 vec_add1 (proposal->transforms, *td);
3448 r = clib_error_return (0, "Unsupported algorithm");
3452 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3456 vec_foreach (td, km->supported_transforms)
3458 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3459 && td->integ_type == ts->integ_alg)
3461 vec_add1 (proposal->transforms, *td);
3469 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3470 r = clib_error_return (0, "Unsupported algorithm");
3479 vec_foreach (td, km->supported_transforms)
3481 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3482 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3484 vec_add1 (proposal->transforms, *td);
3491 r = clib_error_return (0, "Unsupported algorithm");
3500 vec_foreach (td, km->supported_transforms)
3502 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3504 vec_add1 (proposal->transforms, *td);
3507 sa->dh_group = td->dh_type;
3515 r = clib_error_return (0, "Unsupported algorithm");
3523 vec_foreach (td, km->supported_transforms)
3525 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3527 vec_add1 (proposal->transforms, *td);
3533 r = clib_error_return (0, "Unsupported algorithm");
3542 static ikev2_profile_t *
3543 ikev2_profile_index_by_name (u8 * name)
3545 ikev2_main_t *km = &ikev2_main;
3548 p = mhash_get (&km->profile_index_by_name, name);
3552 return pool_elt_at_index (km->profiles, p[0]);
3557 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3558 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3567 b0 = vlib_get_buffer (vm, bi0);
3568 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3569 udp0 = vlib_buffer_get_current (b0);
3570 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3571 udp0->src_port = clib_host_to_net_u16 (src_port);
3572 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3575 if (ip_addr_version (dst) == AF_IP4)
3577 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3578 ip40 = vlib_buffer_get_current (b0);
3579 ip40->ip_version_and_header_length = 0x45;
3581 ip40->fragment_id = 0;
3582 ip40->flags_and_fragment_offset = 0;
3584 ip40->protocol = IP_PROTOCOL_UDP;
3585 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3586 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3587 b0->current_length =
3588 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3589 ip40->length = clib_host_to_net_u16 (b0->current_length);
3590 ip40->checksum = ip4_header_checksum (ip40);
3594 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3595 ip60 = vlib_buffer_get_current (b0);
3597 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3598 ip60->ip_version_traffic_class_and_flow_label =
3599 clib_host_to_net_u32 (0x6 << 28);
3600 ip60->payload_length =
3601 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3602 ip60->protocol = IP_PROTOCOL_UDP;
3603 ip60->hop_limit = 0xff;
3604 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3605 sizeof (ip60->src_address));
3606 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3607 sizeof (ip60->src_address));
3610 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3611 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3612 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3614 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3615 ip4_lookup_node.index : ip6_lookup_node.index;
3617 /* send the request */
3618 f = vlib_get_frame_to_node (vm, next_index);
3619 to_next = vlib_frame_vector_args (f);
3622 vlib_put_frame_to_node (vm, next_index, f);
3627 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3630 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3635 *b = vlib_get_buffer (vm, bi0);
3640 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3642 ikev2_main_t *km = &ikev2_main;
3645 EVP_PKEY_free (km->pkey);
3646 km->pkey = ikev2_load_key_file (file);
3647 if (km->pkey == NULL)
3648 return clib_error_return (0, "load key '%s' failed", file);
3653 static_always_inline vnet_api_error_t
3654 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3656 ikev2_main_t *km = &ikev2_main;
3657 udp_dst_port_info_t *pi;
3659 uword *v = hash_get (km->udp_ports, port);
3660 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3664 /* IKE already uses this port, only increment reference counter */
3671 return VNET_API_ERROR_UDP_PORT_TAKEN;
3673 udp_register_dst_port (km->vlib_main, port,
3674 ipsec4_tun_input_node.index, 1);
3675 hash_set (km->udp_ports, port, 1);
3677 p->ipsec_over_udp_port = port;
3681 static_always_inline void
3682 ikev2_unregister_udp_port (ikev2_profile_t * p)
3684 ikev2_main_t *km = &ikev2_main;
3687 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3690 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3698 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3699 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3702 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3706 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3707 ikev2_main_per_thread_data_t * tkm,
3708 ikev2_sa_t * sa, u8 send_notification)
3710 ikev2_main_t *km = &ikev2_main;
3711 ip_address_t *src, *dst;
3713 ikev2_child_sa_t *c;
3715 /* Create the Initiator notification for IKE SA removal */
3720 vec_resize (sa->del, 1);
3721 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3722 sa->del->spi = sa->ispi;
3724 if (send_notification)
3726 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3729 ikev2_log_error ("buffer alloc failure");
3733 ike0 = vlib_buffer_get_current (b0);
3734 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3735 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3736 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3738 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3739 sa->last_init_msg_id += 1;
3740 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3744 if (ikev2_natt_active (sa))
3745 len = ikev2_insert_non_esp_marker (ike0, len);
3747 if (sa->is_initiator)
3758 ikev2_send_ike (vm, src, dst, bi0, len,
3759 ikev2_get_port (sa), sa->dst_port, 0);
3763 /* delete local SA */
3764 vec_foreach (c, sa->childs)
3765 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3767 u64 rspi = sa->rspi;
3768 ikev2_sa_free_all_vec (sa);
3769 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3772 hash_unset (tkm->sa_by_rspi, rspi);
3773 pool_put (tkm->sas, sa);
3778 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3780 ikev2_main_per_thread_data_t *tkm;
3782 u32 pi = p - km->profiles;
3787 pool_foreach (sa, km->sais) {
3788 if (pi == sa->profile_index)
3789 vec_add1 (del_sai, sa - km->sais);
3793 vec_foreach (sai, del_sai)
3795 sa = pool_elt_at_index (km->sais, sai[0]);
3796 ikev2_sa_free_all_vec (sa);
3797 hash_unset (km->sa_by_ispi, sa->ispi);
3798 pool_put (km->sais, sa);
3800 vec_reset_length (del_sai);
3802 vec_foreach (tkm, km->per_thread_data)
3805 pool_foreach (sa, tkm->sas) {
3806 if (sa->profile_index != ~0 && pi == sa->profile_index)
3807 vec_add1 (del_sai, sa - tkm->sas);
3811 vec_foreach (sai, del_sai)
3813 sa = pool_elt_at_index (tkm->sas, sai[0]);
3814 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3817 vec_reset_length (del_sai);
3824 ikev2_profile_free (ikev2_profile_t * p)
3828 vec_free (p->auth.data);
3830 EVP_PKEY_free (p->auth.key);
3832 vec_free (p->loc_id.data);
3833 vec_free (p->rem_id.data);
3837 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3839 ikev2_main_t *km = &ikev2_main;
3844 if (ikev2_profile_index_by_name (name))
3845 return clib_error_return (0, "policy %v already exists", name);
3847 pool_get (km->profiles, p);
3848 clib_memset (p, 0, sizeof (*p));
3849 p->name = vec_dup (name);
3850 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3851 p->responder.sw_if_index = ~0;
3853 uword index = p - km->profiles;
3854 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3858 p = ikev2_profile_index_by_name (name);
3860 return clib_error_return (0, "policy %v does not exists", name);
3862 ikev2_unregister_udp_port (p);
3863 ikev2_cleanup_profile_sessions (km, p);
3865 ikev2_profile_free (p);
3866 pool_put (km->profiles, p);
3867 mhash_unset (&km->profile_index_by_name, name, 0);
3873 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3874 u8 * auth_data, u8 data_hex_format)
3879 p = ikev2_profile_index_by_name (name);
3883 r = clib_error_return (0, "unknown profile %v", name);
3888 EVP_PKEY_free (p->auth.key);
3889 vec_free (p->auth.data);
3891 p->auth.method = auth_method;
3892 p->auth.data = vec_dup (auth_data);
3893 p->auth.hex = data_hex_format;
3895 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3897 vec_add1 (p->auth.data, 0);
3898 p->auth.key = ikev2_load_cert_file (p->auth.data);
3899 if (p->auth.key == NULL)
3900 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3907 ikev2_is_id_supported (u8 id_type)
3909 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3910 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3911 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3912 id_type == IKEV2_ID_TYPE_ID_FQDN);
3916 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3922 if (!ikev2_is_id_supported (id_type))
3924 r = clib_error_return (0, "unsupported identity type %U",
3925 format_ikev2_id_type, id_type);
3929 p = ikev2_profile_index_by_name (name);
3933 r = clib_error_return (0, "unknown profile %v", name);
3939 vec_free (p->loc_id.data);
3940 p->loc_id.type = id_type;
3941 p->loc_id.data = vec_dup (data);
3945 vec_free (p->rem_id.data);
3946 p->rem_id.type = id_type;
3947 p->rem_id.data = vec_dup (data);
3953 static_always_inline void
3954 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3956 if (ip_addr_version (addr) == AF_IP4)
3957 ts->ts_type = TS_IPV4_ADDR_RANGE;
3959 ts->ts_type = TS_IPV6_ADDR_RANGE;
3962 static_always_inline void
3963 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3964 const ip_address_t * end)
3966 ip_address_copy (&ts->start_addr, start);
3967 ip_address_copy (&ts->end_addr, end);
3971 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3972 u16 start_port, u16 end_port, ip_address_t start_addr,
3973 ip_address_t end_addr, int is_local)
3978 p = ikev2_profile_index_by_name (name);
3982 r = clib_error_return (0, "unknown profile %v", name);
3986 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3987 return clib_error_return (0, "IP address version mismatch!");
3991 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3992 p->loc_ts.start_port = start_port;
3993 p->loc_ts.end_port = end_port;
3994 p->loc_ts.protocol_id = protocol_id;
3995 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3999 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4000 p->rem_ts.start_port = start_port;
4001 p->rem_ts.end_port = end_port;
4002 p->rem_ts.protocol_id = protocol_id;
4003 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4011 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4012 u32 sw_if_index, ip_address_t addr)
4017 p = ikev2_profile_index_by_name (name);
4021 r = clib_error_return (0, "unknown profile %v", name);
4025 p->responder.sw_if_index = sw_if_index;
4026 ip_address_copy (&p->responder.addr, &addr);
4032 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4033 ikev2_transform_encr_type_t crypto_alg,
4034 ikev2_transform_integ_type_t integ_alg,
4035 ikev2_transform_dh_type_t dh_type,
4036 u32 crypto_key_size)
4041 p = ikev2_profile_index_by_name (name);
4045 r = clib_error_return (0, "unknown profile %v", name);
4049 p->ike_ts.crypto_alg = crypto_alg;
4050 p->ike_ts.integ_alg = integ_alg;
4051 p->ike_ts.dh_type = dh_type;
4052 p->ike_ts.crypto_key_size = crypto_key_size;
4057 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4058 ikev2_transform_encr_type_t crypto_alg,
4059 ikev2_transform_integ_type_t integ_alg,
4060 u32 crypto_key_size)
4065 p = ikev2_profile_index_by_name (name);
4069 r = clib_error_return (0, "unknown profile %v", name);
4073 p->esp_ts.crypto_alg = crypto_alg;
4074 p->esp_ts.integ_alg = integ_alg;
4075 p->esp_ts.crypto_key_size = crypto_key_size;
4080 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4081 u8 * name, u32 sw_if_index)
4086 p = ikev2_profile_index_by_name (name);
4090 r = clib_error_return (0, "unknown profile %v", name);
4094 p->tun_itf = sw_if_index;
4100 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4103 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4104 ikev2_main_t *km = &ikev2_main;
4105 vnet_api_error_t rv = 0;
4109 return VNET_API_ERROR_INVALID_VALUE;
4113 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4114 return VNET_API_ERROR_VALUE_EXIST;
4116 rv = ikev2_register_udp_port (p, port);
4120 v = hash_get (km->udp_ports, port);
4122 return VNET_API_ERROR_IKE_NO_PORT;
4124 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4125 return VNET_API_ERROR_INVALID_VALUE;
4127 ikev2_unregister_udp_port (p);
4133 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4135 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4140 r = clib_error_return (0, "unknown profile %v", name);
4149 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4150 u64 lifetime, u32 jitter, u32 handover,
4156 p = ikev2_profile_index_by_name (name);
4160 r = clib_error_return (0, "unknown profile %v", name);
4164 p->lifetime = lifetime;
4165 p->lifetime_jitter = jitter;
4166 p->handover = handover;
4167 p->lifetime_maxdata = maxdata;
4172 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4173 ip_address_t * out_addr)
4175 ip4_address_t *if_ip4;
4176 ip6_address_t *if_ip6;
4180 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4183 ip_address_set (out_addr, if_ip4, AF_IP4);
4189 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4192 ip_address_set (out_addr, if_ip6, AF_IP6);
4200 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4204 ikev2_main_t *km = &ikev2_main;
4208 int len = sizeof (ike_header_t), valid_ip = 0;
4209 ip_address_t if_ip = ip_address_initializer;
4211 p = ikev2_profile_index_by_name (name);
4215 r = clib_error_return (0, "unknown profile %v", name);
4219 if (p->responder.sw_if_index == ~0
4220 || ip_address_is_zero (&p->responder.addr))
4222 r = clib_error_return (0, "responder not set for profile %v", name);
4226 if (ikev2_get_if_address (p->responder.sw_if_index,
4227 ip_addr_version (&p->responder.addr), &if_ip))
4232 /* Prepare the SA and the IKE payload */
4234 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4235 ikev2_payload_chain_t *chain = 0;
4236 ikev2_payload_new_chain (chain);
4238 /* Build the IKE proposal payload */
4239 ikev2_sa_proposal_t *proposals = 0;
4240 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4241 proposals[0].proposal_num = 1;
4242 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4244 /* Add and then cleanup proposal data */
4245 ikev2_payload_add_sa (chain, proposals);
4246 ikev2_sa_free_proposal_vector (&proposals);
4248 sa.is_initiator = 1;
4249 sa.profile_index = p - km->profiles;
4250 sa.state = IKEV2_STATE_SA_INIT;
4251 sa.tun_itf = p->tun_itf;
4252 sa.udp_encap = p->udp_encap;
4253 if (p->natt_disabled)
4254 sa.natt_state = IKEV2_NATT_DISABLED;
4255 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4256 sa.is_tun_itf_set = 1;
4257 sa.initial_contact = 1;
4258 sa.dst_port = IKEV2_PORT;
4260 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4261 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4263 ikev2_sa_free_all_vec (&sa);
4264 ikev2_payload_destroy_chain (chain);
4265 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4268 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4269 ikev2_payload_add_nonce (chain, sa.i_nonce);
4271 /* Build the child SA proposal */
4272 vec_resize (sa.childs, 1);
4273 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4274 &sa.childs[0].i_proposals, 0);
4275 sa.childs[0].i_proposals[0].proposal_num = 1;
4276 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4277 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4278 sizeof (sa.childs[0].i_proposals[0].spi));
4280 /* Add NAT detection notification messages (mandatory) */
4281 u8 *nat_detection_sha1 =
4282 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4283 clib_host_to_net_u64 (sa.rspi),
4284 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4286 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4287 nat_detection_sha1);
4288 vec_free (nat_detection_sha1);
4289 nat_detection_sha1 =
4290 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4291 clib_host_to_net_u64 (sa.rspi),
4293 clib_host_to_net_u16 (sa.dst_port));
4294 ikev2_payload_add_notify (chain,
4295 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4296 nat_detection_sha1);
4297 vec_free (nat_detection_sha1);
4299 u8 *sig_hash_algo = vec_new (u8, 8);
4300 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4301 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4302 ikev2_payload_add_notify (chain,
4303 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4305 vec_free (sig_hash_algo);
4307 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4310 ikev2_sa_free_all_vec (&sa);
4311 ikev2_payload_destroy_chain (chain);
4312 char *errmsg = "buffer alloc failure";
4313 ikev2_log_error (errmsg);
4314 return clib_error_return (0, errmsg);
4316 ike0 = vlib_buffer_get_current (b0);
4318 /* Buffer update and boilerplate */
4319 len += vec_len (chain->data);
4320 ike0->nextpayload = chain->first_payload_type;
4321 ike0->length = clib_host_to_net_u32 (len);
4322 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4323 ikev2_payload_destroy_chain (chain);
4325 ike0->version = IKE_VERSION_2;
4326 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4327 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4328 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4331 sa.last_init_msg_id += 1;
4333 /* store whole IKE payload - needed for PSK auth */
4334 vec_reset_length (sa.last_sa_init_req_packet_data);
4335 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4337 /* add data to the SA then add it to the pool */
4338 ip_address_copy (&sa.iaddr, &if_ip);
4339 ip_address_copy (&sa.raddr, &p->responder.addr);
4340 sa.i_id.type = p->loc_id.type;
4341 sa.i_id.data = vec_dup (p->loc_id.data);
4342 sa.r_id.type = p->rem_id.type;
4343 sa.r_id.data = vec_dup (p->rem_id.data);
4344 sa.i_auth.method = p->auth.method;
4345 sa.i_auth.hex = p->auth.hex;
4346 sa.i_auth.data = vec_dup (p->auth.data);
4347 sa.sw_if_index = p->responder.sw_if_index;
4348 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4349 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4351 ikev2_initial_contact_cleanup (0, &sa);
4353 /* add SA to the pool */
4354 ikev2_sa_t *sa0 = 0;
4355 pool_get (km->sais, sa0);
4356 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4357 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4361 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4362 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4365 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4366 clib_host_to_net_u64 (sa0->ispi), 0,
4367 ip_addr_v4 (&p->responder.addr).as_u32,
4368 ip_addr_version (&p->responder.addr) == AF_IP4);
4373 clib_error_return (0, "interface %U does not have any IP address!",
4374 format_vnet_sw_if_index_name, vnet_get_main (),
4375 p->responder.sw_if_index);
4383 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4384 ikev2_child_sa_t * csa)
4386 /* Create the Initiator notification for child SA removal */
4387 ikev2_main_t *km = &ikev2_main;
4393 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4396 ikev2_log_error ("buffer alloc failure");
4400 ike0 = vlib_buffer_get_current (b0);
4401 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4402 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4403 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4405 vec_resize (sa->del, 1);
4406 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4407 sa->del->spi = csa->i_proposals->spi;
4408 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4409 sa->last_init_msg_id += 1;
4410 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4414 if (ikev2_natt_active (sa))
4415 len = ikev2_insert_non_esp_marker (ike0, len);
4416 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4417 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4419 /* delete local child SA */
4420 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4421 ikev2_sa_del_child_sa (sa, csa);
4425 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4428 ikev2_main_t *km = &ikev2_main;
4429 ikev2_main_per_thread_data_t *tkm;
4430 ikev2_sa_t *fsa = 0;
4431 ikev2_child_sa_t *fchild = 0;
4433 /* Search for the child SA */
4434 vec_foreach (tkm, km->per_thread_data)
4440 pool_foreach (sa, tkm->sas) {
4441 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4451 if (!fchild || !fsa)
4453 r = clib_error_return (0, "Child SA not found");
4458 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4465 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4468 ikev2_main_t *km = &ikev2_main;
4469 ikev2_main_per_thread_data_t *tkm;
4470 ikev2_sa_t *fsa = 0;
4471 ikev2_main_per_thread_data_t *ftkm = 0;
4473 /* Search for the IKE SA */
4474 vec_foreach (tkm, km->per_thread_data)
4480 pool_foreach (sa, tkm->sas) {
4481 if (sa->ispi == ispi)
4493 r = clib_error_return (0, "IKE SA not found");
4497 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4502 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4503 ikev2_child_sa_t * csa)
4505 /* Create the Initiator request for create child SA */
4511 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4514 ikev2_log_error ("buffer alloc failure");
4518 ike0 = vlib_buffer_get_current (b0);
4519 ike0->version = IKE_VERSION_2;
4520 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4521 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4522 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4523 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4524 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4525 sa->last_init_msg_id += 1;
4527 ikev2_rekey_t *rekey;
4528 vec_reset_length (sa->rekey);
4529 vec_add2 (sa->rekey, rekey, 1);
4530 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4533 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4534 rekey->spi = proposals[0].spi;
4535 rekey->ispi = csa->i_proposals->spi;
4536 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4540 if (ikev2_natt_active (sa))
4541 len = ikev2_insert_non_esp_marker (ike0, len);
4542 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4543 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4544 vec_free (proposals);
4548 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4551 ikev2_main_t *km = &ikev2_main;
4552 ikev2_main_per_thread_data_t *tkm;
4553 ikev2_sa_t *fsa = 0;
4554 ikev2_child_sa_t *fchild = 0;
4556 /* Search for the child SA */
4557 vec_foreach (tkm, km->per_thread_data)
4563 pool_foreach (sa, tkm->sas) {
4564 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4574 if (!fchild || !fsa)
4576 r = clib_error_return (0, "Child SA not found");
4581 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4588 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4590 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4594 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4596 u64 *ispi, *ispi_vec = 0;
4597 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4598 ikev2_main_t *km = &ikev2_main;
4599 ikev2_main_per_thread_data_t *tkm;
4600 p->responder.sw_if_index = ~0;
4602 vec_foreach (tkm, km->per_thread_data)
4605 pool_foreach (sa, tkm->sas) {
4606 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4607 vec_add1 (sa_vec, sa);
4611 vec_foreach (sap, sa_vec)
4613 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4615 vec_reset_length (sa_vec);
4620 pool_foreach (sa, km->sais) {
4621 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4622 vec_add1 (ispi_vec, sa->ispi);
4626 vec_foreach (ispi, ispi_vec)
4628 ikev2_del_sa_init_from_main (ispi);
4631 vec_free (ispi_vec);
4634 static clib_error_t *
4635 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4637 ikev2_main_t *km = &ikev2_main;
4644 pool_foreach (p, km->profiles) {
4645 if (p->responder.sw_if_index == sw_if_index)
4646 ikev2_sa_del (p, sw_if_index);
4653 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4656 ikev2_init (vlib_main_t * vm)
4658 ikev2_main_t *km = &ikev2_main;
4659 vlib_thread_main_t *tm = vlib_get_thread_main ();
4662 clib_memset (km, 0, sizeof (ikev2_main_t));
4663 km->vnet_main = vnet_get_main ();
4666 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4667 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4668 ikev2_crypto_init (km);
4670 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4672 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4673 CLIB_CACHE_LINE_BYTES);
4674 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4676 ikev2_main_per_thread_data_t *ptd =
4677 vec_elt_at_index (km->per_thread_data, thread_id);
4679 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4681 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4682 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4683 ptd->hmac_ctx = HMAC_CTX_new ();
4685 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4686 ptd->evp_ctx = &ptd->_evp_ctx;
4687 HMAC_CTX_init (&(ptd->_hmac_ctx));
4688 ptd->hmac_ctx = &ptd->_hmac_ctx;
4692 km->sa_by_ispi = hash_create (0, sizeof (uword));
4693 km->sw_if_indices = hash_create (0, 0);
4694 km->udp_ports = hash_create (0, sizeof (uword));
4696 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4697 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4698 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4699 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4701 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt");
4702 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4704 ikev2_cli_reference ();
4706 km->log_level = IKEV2_LOG_ERROR;
4707 km->log_class = vlib_log_register_class ("ikev2", 0);
4712 VLIB_INIT_FUNCTION (ikev2_init) =
4714 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4719 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4722 ikev2_main_t *km = &ikev2_main;
4723 ikev2_profile_t *p = 0;
4724 vlib_main_t *vm = km->vlib_main;
4725 f64 now = vlib_time_now (vm);
4728 if (sa->profile_index != ~0)
4729 p = pool_elt_at_index (km->profiles, sa->profile_index);
4731 if (sa->is_initiator && p && csa->time_to_expiration
4732 && now > csa->time_to_expiration)
4734 if (!csa->is_expired || csa->rekey_retries > 0)
4736 ikev2_rekey_child_sa_internal (vm, sa, csa);
4737 csa->time_to_expiration = now + p->handover;
4738 csa->is_expired = 1;
4739 if (csa->rekey_retries == 0)
4741 csa->rekey_retries = 5;
4743 else if (csa->rekey_retries > 0)
4745 csa->rekey_retries--;
4746 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4747 csa->i_proposals->spi, csa->rekey_retries);
4748 if (csa->rekey_retries == 0)
4750 csa->rekey_retries = -1;
4757 csa->time_to_expiration = 0;
4758 ikev2_delete_child_sa_internal (vm, sa, csa);
4766 ipip_tunnel_t *ipip = NULL;
4767 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4768 if (~0 == sw_if_index)
4770 ip46_address_t local_ip;
4771 ip46_address_t remote_ip;
4772 if (sa->is_initiator)
4774 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4775 ip_addr_bytes (&sa->iaddr));
4776 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4777 ip_addr_bytes (&sa->raddr));
4781 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4782 ip_addr_bytes (&sa->raddr));
4783 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4784 ip_addr_bytes (&sa->iaddr));
4788 ipip_tunnel_key_t key = {
4791 .transport = IPIP_TRANSPORT_IP4,
4796 ipip = ipip_tunnel_db_find (&key);
4799 sw_if_index = ipip->sw_if_index;
4805 vec_add1 (sas_in, csa->remote_sa_id);
4806 vlib_worker_thread_barrier_sync (vm);
4807 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4808 csa->local_sa_id, sas_in);
4811 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4812 vlib_worker_thread_barrier_release (vm);
4819 ikev2_set_log_level (ikev2_log_level_t log_level)
4821 ikev2_main_t *km = &ikev2_main;
4823 if (log_level >= IKEV2_LOG_MAX)
4825 ikev2_log_error ("unknown logging level %d", log_level);
4829 km->log_level = log_level;
4834 ikev2_set_liveness_params (u32 period, u32 max_retries)
4836 ikev2_main_t *km = &ikev2_main;
4838 if (period == 0 || max_retries == 0)
4839 return clib_error_return (0, "invalid args");
4841 km->liveness_period = period;
4842 km->liveness_max_retries = max_retries;
4847 ikev2_profile_natt_disable (u8 * name)
4849 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4851 return clib_error_return (0, "unknown profile %v", name);
4853 p->natt_disabled = 1;
4858 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4860 ikev2_main_t *km = &ikev2_main;
4861 vlib_main_t *vm = km->vlib_main;
4862 ikev2_main_per_thread_data_t *tkm;
4863 ikev2_sa_t *fsa = 0;
4864 ikev2_profile_t *p = 0;
4865 ikev2_child_sa_t *fchild = 0;
4866 f64 now = vlib_time_now (vm);
4867 vlib_counter_t counts;
4869 /* Search for the SA and child SA */
4870 vec_foreach (tkm, km->per_thread_data)
4876 pool_foreach (sa, tkm->sas) {
4877 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4886 vlib_get_combined_counter (&ipsec_sa_counters,
4887 ipsec_sa->stat_index, &counts);
4889 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4890 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4892 if (fchild && p && p->lifetime_maxdata)
4894 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4896 fchild->time_to_expiration = now;
4902 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4908 if (ip_address_is_zero (&sa->iaddr))
4910 p = pool_elt_at_index (km->profiles, sa->profile_index);
4911 if (!ikev2_get_if_address (p->responder.sw_if_index,
4912 ip_addr_version (&p->responder.addr),
4916 /* update NAT detection payload */
4918 ikev2_find_ike_notify_payload
4919 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4920 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4924 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4925 clib_host_to_net_u64 (sa->rspi),
4927 clib_host_to_net_u16 (IKEV2_PORT));
4928 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4933 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4936 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4937 clib_memcpy_fast (vlib_buffer_get_current (b),
4938 sa->last_sa_init_req_packet_data,
4939 vec_len (sa->last_sa_init_req_packet_data));
4941 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4942 vec_len (sa->last_sa_init_req_packet_data),
4943 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4947 ikev2_process_pending_sa_init (ikev2_main_t * km)
4954 hash_foreach (ispi, sai, km->sa_by_ispi,
4956 sa = pool_elt_at_index (km->sais, sai);
4957 if (sa->init_response_received)
4960 ikev2_process_pending_sa_init_one (km, sa);
4966 ikev2_send_informational_request (ikev2_sa_t * sa)
4968 ikev2_main_t *km = &ikev2_main;
4969 ip_address_t *src, *dst;
4976 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4979 ikev2_log_error ("buffer alloc failure");
4983 ike0 = vlib_buffer_get_current (b0);
4984 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4985 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4986 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4987 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4989 sa->last_init_msg_id += 1;
4990 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4994 if (ikev2_natt_active (sa))
4995 len = ikev2_insert_non_esp_marker (ike0, len);
4997 if (sa->is_initiator)
5008 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5009 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5014 ikev2_disable_dpd (void)
5016 ikev2_main_t *km = &ikev2_main;
5017 km->dpd_disabled = 1;
5020 static_always_inline int
5021 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
5023 ikev2_main_t *km = &ikev2_main;
5024 vlib_main_t *vm = km->vlib_main;
5026 if (!sa->keys_generated)
5029 if (sa->liveness_retries >= km->liveness_max_retries)
5032 f64 now = vlib_time_now (vm);
5034 if (sa->liveness_period_check < now)
5036 sa->liveness_retries++;
5037 sa->liveness_period_check = now + km->liveness_period;
5038 ikev2_send_informational_request (sa);
5044 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5047 ikev2_main_t *km = &ikev2_main;
5048 ipsec_main_t *im = &ipsec_main;
5050 ikev2_child_sa_t *c;
5055 vlib_process_wait_for_event_or_clock (vm, 2);
5056 vlib_process_get_events (vm, NULL);
5058 /* process ike child sas */
5059 ikev2_main_per_thread_data_t *tkm;
5060 vec_foreach (tkm, km->per_thread_data)
5063 u32 *to_be_deleted = 0;
5066 pool_foreach (sa, tkm->sas) {
5067 ikev2_child_sa_t *c;
5070 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5073 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5075 sa->old_remote_id_present = 0;
5079 sa->old_id_expiration -= 1;
5081 vec_foreach (c, sa->childs)
5082 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5084 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5085 vec_add1 (to_be_deleted, sa - tkm->sas);
5089 vec_foreach (sai, to_be_deleted)
5091 sa = pool_elt_at_index (tkm->sas, sai[0]);
5092 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5093 vec_foreach (c, sa->childs)
5095 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5096 ikev2_sa_del_child_sa (sa, c);
5098 ikev2_sa_free_all_vec (sa);
5099 hash_unset (tkm->sa_by_rspi, sa->rspi);
5100 pool_put (tkm->sas, sa);
5104 p = pool_elt_at_index (km->profiles, sa->profile_index);
5107 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5110 ikev2_log_error ("%U", format_clib_error, e);
5111 clib_error_free (e);
5116 vec_free (to_be_deleted);
5119 /* process ipsec sas */
5122 pool_foreach (sa, im->sad) {
5123 ikev2_mngr_process_ipsec_sa(sa);
5127 ikev2_process_pending_sa_init (km);
5133 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5134 .function = ikev2_mngr_process_fn,
5135 .type = VLIB_NODE_TYPE_PROCESS,
5137 "ikev2-manager-process",
5140 VLIB_PLUGIN_REGISTER () = {
5141 .version = VPP_BUILD_VER,
5142 .description = "Internet Key Exchange (IKEv2) Protocol",
5147 * fd.io coding-style-patch-verification: ON
5150 * eval: (c-set-style "gnu")