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 <plugins/dns/dns.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
32 #include <plugins/ikev2/ikev2.api_enum.h>
34 #define IKEV2_LIVENESS_RETRIES 3
35 #define IKEV2_LIVENESS_PERIOD_CHECK 30
37 ikev2_main_t ikev2_main;
39 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
41 ikev2_child_sa_t * child);
43 #define ikev2_set_state(sa, v, ...) do { \
45 ikev2_elog_sa_state("ispi %lx SA state changed to " #v __VA_ARGS__, sa->ispi); \
55 format_ikev2_trace (u8 * s, va_list * args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
61 s = format (s, "ikev2: sw_if_index %d, next index %d",
62 t->sw_if_index, t->next_index);
66 #define IKEV2_GENERATE_SA_INIT_OK_str ""
67 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
68 "no DH group configured for IKE proposals!"
69 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
70 "DH group not supported!"
74 IKEV2_GENERATE_SA_INIT_OK,
75 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
76 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
77 } ikev2_generate_sa_error_t;
80 format_ikev2_gen_sa_error (u8 * s, va_list * args)
82 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
85 case IKEV2_GENERATE_SA_INIT_OK:
87 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
88 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
90 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
91 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
99 IKEV2_NEXT_IP4_LOOKUP,
100 IKEV2_NEXT_IP4_ERROR_DROP,
106 IKEV2_NEXT_IP6_LOOKUP,
107 IKEV2_NEXT_IP6_ERROR_DROP,
111 typedef u32 ikev2_non_esp_marker;
113 static_always_inline u16
114 ikev2_get_port (ikev2_sa_t * sa)
116 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
119 static_always_inline int
120 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
122 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
123 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
124 return len + sizeof (ikev2_non_esp_marker);
127 static ikev2_sa_transform_t *
128 ikev2_find_transform_data (ikev2_sa_transform_t * t)
130 ikev2_main_t *km = &ikev2_main;
131 ikev2_sa_transform_t *td;
133 vec_foreach (td, km->supported_transforms)
135 if (td->type != t->type)
138 if (td->transform_id != t->transform_id)
141 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
143 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
144 || t->attrs[1] != 14)
147 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
155 static ikev2_sa_proposal_t *
156 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
157 ikev2_protocol_id_t prot_id)
159 ikev2_sa_proposal_t *rv = 0;
160 ikev2_sa_proposal_t *proposal;
161 ikev2_sa_transform_t *transform, *new_t;
162 u8 mandatory_bitmap, optional_bitmap;
164 if (prot_id == IKEV2_PROTOCOL_IKE)
166 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
167 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
168 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
170 else if (prot_id == IKEV2_PROTOCOL_ESP)
172 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
173 (1 << IKEV2_TRANSFORM_TYPE_ESN);
174 optional_bitmap = mandatory_bitmap |
175 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
177 else if (prot_id == IKEV2_PROTOCOL_AH)
179 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
180 (1 << IKEV2_TRANSFORM_TYPE_ESN);
181 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
186 vec_add2 (rv, proposal, 1);
188 vec_foreach (proposal, proposals)
191 if (proposal->protocol_id != prot_id)
194 vec_foreach (transform, proposal->transforms)
196 if ((1 << transform->type) & bitmap)
199 if (ikev2_find_transform_data (transform))
201 bitmap |= 1 << transform->type;
202 vec_add2 (rv->transforms, new_t, 1);
203 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
204 new_t->attrs = vec_dup (transform->attrs);
208 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
209 (bitmap & ~optional_bitmap) == 0)
211 rv->proposal_num = proposal->proposal_num;
212 rv->protocol_id = proposal->protocol_id;
213 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
218 vec_free (rv->transforms);
227 ikev2_sa_transform_t *
228 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
229 ikev2_transform_type_t type)
231 ikev2_sa_transform_t *t;
236 vec_foreach (t, p->transforms)
239 return ikev2_find_transform_data (t);
245 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
249 vec_foreach (c, sa->childs)
251 ikev2_sa_proposal_t *proposal =
252 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
253 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
261 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
263 ikev2_sa_proposal_t *p;
264 ikev2_sa_transform_t *t;
271 vec_foreach (t, p->transforms)
275 vec_free (p->transforms);
281 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
283 ikev2_sa_free_proposal_vector (&c->r_proposals);
284 ikev2_sa_free_proposal_vector (&c->i_proposals);
294 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
297 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
303 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
305 ikev2_sa_free_child_sa (child);
306 vec_del1 (sa->childs, child - sa->childs);
310 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
312 vec_free (sa->i_nonce);
313 vec_free (sa->r_nonce);
315 vec_free (sa->dh_shared_key);
316 vec_free (sa->dh_private_key);
317 vec_free (sa->i_dh_data);
318 vec_free (sa->r_dh_data);
320 ikev2_sa_free_proposal_vector (&sa->r_proposals);
321 ikev2_sa_free_proposal_vector (&sa->i_proposals);
324 vec_free (sa->sk_ai);
325 vec_free (sa->sk_ar);
326 vec_free (sa->sk_ei);
327 vec_free (sa->sk_er);
328 vec_free (sa->sk_pi);
329 vec_free (sa->sk_pr);
331 vec_free (sa->i_id.data);
332 vec_free (sa->r_id.data);
334 vec_free (sa->i_auth.data);
336 EVP_PKEY_free (sa->i_auth.key);
337 vec_free (sa->r_auth.data);
339 EVP_PKEY_free (sa->r_auth.key);
343 vec_free (sa->rekey);
345 vec_free (sa->last_sa_init_req_packet_data);
346 vec_free (sa->last_sa_init_res_packet_data);
348 vec_free (sa->last_res_packet_data);
350 ikev2_sa_free_all_child_sa (&sa->childs);
354 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
358 ikev2_sa_free_all_vec (sa);
360 p = hash_get (ptd->sa_by_rspi, sa->rspi);
363 hash_unset (ptd->sa_by_rspi, sa->rspi);
364 pool_put (ptd->sas, sa);
368 static ikev2_generate_sa_error_t
369 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
371 ikev2_sa_transform_t *t = 0, *t2;
372 ikev2_main_t *km = &ikev2_main;
374 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
375 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
377 /* check if received DH group is on our list of supported groups */
378 vec_foreach (t2, km->supported_transforms)
380 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
389 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
390 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
393 if (sa->is_initiator)
396 RAND_bytes ((u8 *) & sa->ispi, 8);
399 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
400 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
405 RAND_bytes ((u8 *) & sa->rspi, 8);
408 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
409 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
412 /* generate dh keys */
413 ikev2_generate_dh (sa, t);
415 return IKEV2_GENERATE_SA_INIT_OK;
419 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
421 ikev2_sa_transform_t *t = 0, *t2;
422 ikev2_main_t *km = &ikev2_main;
424 /*move some data to the new SA */
425 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
426 sa->i_nonce = _(sai->i_nonce);
427 sa->i_dh_data = _(sai->i_dh_data);
428 sa->dh_private_key = _(sai->dh_private_key);
429 ip_address_copy (&sa->iaddr, &sai->iaddr);
430 ip_address_copy (&sa->raddr, &sai->raddr);
431 sa->is_initiator = sai->is_initiator;
432 sa->i_id.type = sai->i_id.type;
433 sa->r_id.type = sai->r_id.type;
434 sa->profile_index = sai->profile_index;
435 sa->tun_itf = sai->tun_itf;
436 sa->is_tun_itf_set = sai->is_tun_itf_set;
437 if (sai->natt_state == IKEV2_NATT_DISABLED)
438 sa->natt_state = IKEV2_NATT_DISABLED;
439 sa->i_id.data = _(sai->i_id.data);
440 sa->r_id.data = _(sai->r_id.data);
441 sa->i_auth.method = sai->i_auth.method;
442 sa->i_auth.hex = sai->i_auth.hex;
443 sa->i_auth.data = _(sai->i_auth.data);
444 sa->i_auth.key = _(sai->i_auth.key);
445 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
446 sa->last_init_msg_id = sai->last_init_msg_id;
447 sa->childs = _(sai->childs);
448 sa->udp_encap = sai->udp_encap;
449 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
450 sa->dst_port = sai->dst_port;
451 sa->sw_if_index = sai->sw_if_index;
455 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
460 /* check if received DH group is on our list of supported groups */
461 vec_foreach (t2, km->supported_transforms)
463 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
472 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
477 /* generate dh keys */
478 ikev2_complete_dh (sa, t);
483 ikev2_calc_keys (ikev2_sa_t * sa)
486 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
489 u16 integ_key_len = 0, salt_len = 0;
490 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
492 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
494 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
496 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
499 integ_key_len = tr_integ->key_len;
501 salt_len = sizeof (u32);
503 vec_append (s, sa->i_nonce);
504 vec_append (s, sa->r_nonce);
505 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
507 /* Calculate S = Ni | Nr | SPIi | SPIr */
509 vec_add2 (s, tmp, 2 * sizeof (*spi));
511 spi[0] = clib_host_to_net_u64 (sa->ispi);
512 spi[1] = clib_host_to_net_u64 (sa->rspi);
514 /* calculate PRFplus */
516 int len = tr_prf->key_trunc + /* SK_d */
517 integ_key_len * 2 + /* SK_ai, SK_ar */
518 tr_encr->key_len * 2 + /* SK_ei, SK_er */
519 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
522 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
529 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
530 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
531 pos += tr_prf->key_trunc;
536 sa->sk_ai = vec_new (u8, integ_key_len);
537 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
538 pos += integ_key_len;
541 sa->sk_ar = vec_new (u8, integ_key_len);
542 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
543 pos += integ_key_len;
547 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
548 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
549 pos += tr_encr->key_len + salt_len;
552 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
553 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
554 pos += tr_encr->key_len + salt_len;
557 sa->sk_pi = vec_new (u8, tr_prf->key_len);
558 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
559 pos += tr_prf->key_len;
562 sa->sk_pr = vec_new (u8, tr_prf->key_len);
563 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
564 pos += tr_prf->key_len;
567 sa->keys_generated = 1;
571 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
574 u16 integ_key_len = 0;
577 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
579 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
581 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
583 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
586 integ_key_len = ctr_integ->key_len;
588 salt_len = sizeof (u32);
590 vec_append (s, sa->i_nonce);
591 vec_append (s, sa->r_nonce);
592 /* calculate PRFplus */
594 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
596 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
601 child->sk_ei = vec_new (u8, ctr_encr->key_len);
602 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
603 pos += ctr_encr->key_len;
608 child->sk_ai = vec_new (u8, ctr_integ->key_len);
609 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
610 pos += ctr_integ->key_len;
614 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
619 child->sk_er = vec_new (u8, ctr_encr->key_len);
620 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
621 pos += ctr_encr->key_len;
626 child->sk_ar = vec_new (u8, integ_key_len);
627 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
628 pos += integ_key_len;
632 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
641 static_always_inline u8 *
642 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
644 const u32 max_buf_size =
645 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
646 u8 buf[max_buf_size];
647 u8 *res = vec_new (u8, 20);
649 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
650 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
651 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
652 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
653 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
658 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
661 const ike_ke_payload_header_t *ke = p;
662 u16 plen = clib_net_to_host_u16 (ke->length);
663 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
664 if (sizeof (*ke) > rlen)
667 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
668 vec_reset_length (ke_data[0]);
669 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
674 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
676 const ike_payload_header_t *ikep = p;
677 u16 plen = clib_net_to_host_u16 (ikep->length);
678 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
679 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
684 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
687 if (sizeof (*ikep) > rlen)
689 *plen = clib_net_to_host_u16 (ikep->length);
690 if (*plen < sizeof (*ikep) || *plen > rlen)
696 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
697 udp_header_t *udp, u32 len, u32 sw_if_index)
699 u8 nonce[IKEV2_NONCE_SIZE];
701 u8 payload = ike->nextpayload;
702 ike_payload_header_t *ikep;
705 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
706 "from ", clib_net_to_host_u64 (ike->ispi),
707 clib_net_to_host_u64 (ike->rspi),
708 ip_addr_v4 (&sa->iaddr).as_u32,
709 ip_addr_version (&sa->iaddr) == AF_IP4);
711 sa->ispi = clib_net_to_host_u64 (ike->ispi);
712 sa->sw_if_index = sw_if_index;
714 /* store whole IKE payload - needed for PSK auth */
715 vec_reset_length (sa->last_sa_init_req_packet_data);
716 vec_add (sa->last_sa_init_req_packet_data, ike, len);
718 if (len < sizeof (*ike))
721 len -= sizeof (*ike);
722 while (p < len && payload != IKEV2_PAYLOAD_NONE)
724 ikep = (ike_payload_header_t *) & ike->payload[p];
725 int current_length = len - p;
726 if (!ikev2_check_payload_length (ikep, current_length, &plen))
729 if (payload == IKEV2_PAYLOAD_SA)
731 ikev2_sa_free_proposal_vector (&sa->i_proposals);
732 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
734 else if (payload == IKEV2_PAYLOAD_KE)
736 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
740 else if (payload == IKEV2_PAYLOAD_NONCE)
742 vec_reset_length (sa->i_nonce);
743 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
744 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
746 else if (payload == IKEV2_PAYLOAD_NOTIFY)
749 ikev2_parse_notify_payload (ikep, current_length);
750 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
752 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
754 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
756 if (sa->natt_state == IKEV2_NATT_ENABLED)
757 sa->natt_state = IKEV2_NATT_ACTIVE;
758 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
759 " behind NAT", sa->ispi);
763 else if (n->msg_type ==
764 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
766 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
768 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
770 if (sa->natt_state == IKEV2_NATT_ENABLED)
771 sa->natt_state = IKEV2_NATT_ACTIVE;
772 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
773 " (self) behind NAT", sa->ispi);
779 else if (payload == IKEV2_PAYLOAD_VENDOR)
781 ikev2_parse_vendor_payload (ikep);
785 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
787 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
789 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
790 sa->unsupported_cp = payload;
795 payload = ikep->nextpayload;
799 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
804 ikev2_process_sa_init_resp (vlib_main_t * vm,
805 ikev2_sa_t * sa, ike_header_t * ike,
806 udp_header_t * udp, u32 len)
808 u8 nonce[IKEV2_NONCE_SIZE];
810 u8 payload = ike->nextpayload;
811 ike_payload_header_t *ikep;
814 sa->ispi = clib_net_to_host_u64 (ike->ispi);
815 sa->rspi = clib_net_to_host_u64 (ike->rspi);
817 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
818 "from ", sa->ispi, sa->rspi,
819 ip_addr_v4 (&sa->raddr).as_u32,
820 ip_addr_version (&sa->raddr) == AF_IP4);
822 /* store whole IKE payload - needed for PSK auth */
823 vec_reset_length (sa->last_sa_init_res_packet_data);
824 vec_add (sa->last_sa_init_res_packet_data, ike, len);
826 if (sizeof (*ike) > len)
829 len -= sizeof (*ike);
830 while (p < len && payload != IKEV2_PAYLOAD_NONE)
832 int current_length = len - p;
833 ikep = (ike_payload_header_t *) & ike->payload[p];
834 if (!ikev2_check_payload_length (ikep, current_length, &plen))
837 if (payload == IKEV2_PAYLOAD_SA)
839 ikev2_sa_free_proposal_vector (&sa->r_proposals);
840 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
843 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
845 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
848 else if (payload == IKEV2_PAYLOAD_KE)
850 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
854 else if (payload == IKEV2_PAYLOAD_NONCE)
856 vec_reset_length (sa->r_nonce);
857 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
858 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
860 else if (payload == IKEV2_PAYLOAD_NOTIFY)
863 ikev2_parse_notify_payload (ikep, current_length);
864 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
866 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
869 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
871 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
872 " behind NAT, unsupported", sa->ispi);
876 else if (n->msg_type ==
877 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
879 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
882 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
884 if (sa->natt_state == IKEV2_NATT_ENABLED)
885 sa->natt_state = IKEV2_NATT_ACTIVE;
886 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
887 " (self) behind NAT", sa->ispi);
893 else if (payload == IKEV2_PAYLOAD_VENDOR)
895 ikev2_parse_vendor_payload (ikep);
899 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
901 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
903 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
904 sa->unsupported_cp = payload;
909 payload = ikep->nextpayload;
915 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
916 u8 * payload, u32 rlen, u32 * out_len)
918 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
920 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
921 ike_payload_header_t *ikep = 0;
924 ikev2_sa_transform_t *tr_integ;
925 ikev2_sa_transform_t *tr_encr;
927 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
929 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
930 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
932 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
935 if (rlen <= sizeof (*ike))
938 int len = rlen - sizeof (*ike);
940 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
942 ikep = (ike_payload_header_t *) & ike->payload[p];
943 int current_length = len - p;
944 if (!ikev2_check_payload_length (ikep, current_length, &plen))
947 if (*payload == IKEV2_PAYLOAD_SK)
949 last_payload = *payload;
953 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
955 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
957 sa->unsupported_cp = *payload;
962 *payload = ikep->nextpayload;
966 if (last_payload != IKEV2_PAYLOAD_SK)
968 ikev2_elog_error ("Last payload must be SK");
974 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
977 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
978 u8 *aad = (u8 *) ike;
979 u32 aad_len = ikep->payload - aad;
980 u8 *tag = ikep->payload + plen;
982 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
983 plen, aad, aad_len, tag, &dlen);
987 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
992 if (rlen < tr_integ->key_trunc)
996 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
997 (u8 *) ike, rlen - tr_integ->key_trunc);
999 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1002 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1004 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1006 ikev2_elog_error ("message integrity check failed");
1012 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1017 plaintext = ikep->payload + tr_encr->block_size;
1024 static_always_inline int
1025 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1027 if (i1->type != i2->type)
1030 if (vec_len (i1->data) != vec_len (i2->data))
1033 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1040 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1043 ikev2_main_t *km = &ikev2_main;
1046 ikev2_child_sa_t *c;
1048 /* find old IKE SAs with the same authenticated identity */
1050 pool_foreach (tmp, ptd->sas) {
1051 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1052 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1055 if (sa->rspi != tmp->rspi)
1056 vec_add1(delete, tmp - ptd->sas);
1060 for (i = 0; i < vec_len (delete); i++)
1062 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1063 vec_foreach (c, tmp->childs)
1065 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1067 ikev2_delete_sa (ptd, tmp);
1071 sa->initial_contact = 0;
1075 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1078 ikev2_main_t *km = &ikev2_main;
1080 if (!sa->initial_contact)
1085 ikev2_initial_contact_cleanup_internal (ptd, sa);
1089 vec_foreach (ptd, km->per_thread_data)
1090 ikev2_initial_contact_cleanup_internal (ptd, sa);
1092 sa->initial_contact = 0;
1096 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1098 const ike_id_payload_header_t *id = p;
1099 u16 plen = clib_net_to_host_u16 (id->length);
1100 if (plen < sizeof (*id) || plen > rlen)
1103 sa_id->type = id->id_type;
1104 vec_reset_length (sa_id->data);
1105 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1111 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1113 const ike_auth_payload_header_t *ah = p;
1114 u16 plen = clib_net_to_host_u16 (ah->length);
1116 a->method = ah->auth_method;
1117 vec_reset_length (a->data);
1118 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1123 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1124 ike_header_t * ike, u32 len)
1127 ikev2_child_sa_t *first_child_sa;
1128 u8 payload = ike->nextpayload;
1130 ike_payload_header_t *ikep;
1134 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1135 "from ", clib_host_to_net_u64 (ike->ispi),
1136 clib_host_to_net_u64 (ike->rspi),
1138 ip_addr_v4 (&sa->raddr).as_u32 :
1139 ip_addr_v4 (&sa->iaddr).as_u32,
1140 ip_addr_version (&sa->raddr) == AF_IP4);
1142 ikev2_calc_keys (sa);
1144 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1148 if (sa->unsupported_cp)
1150 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1156 /* select or create 1st child SA */
1157 if (sa->is_initiator)
1159 first_child_sa = &sa->childs[0];
1163 ikev2_sa_free_all_child_sa (&sa->childs);
1164 vec_add2 (sa->childs, first_child_sa, 1);
1168 /* process encrypted payload */
1169 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1171 ikep = (ike_payload_header_t *) & plaintext[p];
1172 int current_length = dlen - p;
1173 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1176 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1178 if (sa->is_initiator)
1180 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1181 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1186 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1187 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1191 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1193 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1196 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1198 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1201 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1203 if (sa->is_initiator)
1205 if (!ikev2_parse_auth_payload (ikep, current_length,
1211 if (!ikev2_parse_auth_payload (ikep, current_length,
1216 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1219 ikev2_parse_notify_payload (ikep, current_length);
1220 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1222 sa->initial_contact = 1;
1226 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1228 ikev2_parse_vendor_payload (ikep);
1230 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1232 vec_free (first_child_sa->tsi);
1233 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1235 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1237 vec_free (first_child_sa->tsr);
1238 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1242 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1245 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1247 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1248 sa->unsupported_cp = payload;
1253 payload = ikep->nextpayload;
1260 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1265 ikev2_process_informational_req (vlib_main_t * vm,
1266 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1269 u8 payload = ike->nextpayload;
1271 ike_payload_header_t *ikep;
1273 ikev2_notify_t *n = 0;
1275 sa->liveness_retries = 0;
1276 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1277 "from ", clib_host_to_net_u64 (ike->ispi),
1278 clib_host_to_net_u64 (ike->rspi),
1279 ip_addr_v4 (&sa->iaddr).as_u32,
1280 ip_addr_version (&sa->iaddr) == AF_IP4);
1282 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1287 /* process encrypted payload */
1289 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1291 u32 current_length = dlen - p;
1292 if (p + sizeof (*ikep) > dlen)
1295 ikep = (ike_payload_header_t *) & plaintext[p];
1296 u16 plen = clib_net_to_host_u16 (ikep->length);
1298 if (plen < sizeof (*ikep) || plen > current_length)
1301 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1303 n = ikev2_parse_notify_payload (ikep, current_length);
1306 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1307 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1310 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1312 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1314 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1316 ikev2_parse_vendor_payload (ikep);
1320 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1322 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1324 sa->unsupported_cp = payload;
1328 payload = ikep->nextpayload;
1335 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1336 ikev2_sa_t * sa, ike_header_t * ike,
1340 u8 payload = ike->nextpayload;
1343 u8 nonce[IKEV2_NONCE_SIZE];
1344 ikev2_rekey_t *rekey;
1345 ike_payload_header_t *ikep;
1346 ikev2_notify_t *n = 0;
1347 ikev2_ts_t *tsi = 0;
1348 ikev2_ts_t *tsr = 0;
1349 ikev2_sa_proposal_t *proposal = 0;
1350 ikev2_child_sa_t *child_sa;
1354 if (sa->is_initiator)
1355 src = ip_addr_v4 (&sa->raddr).as_u32;
1357 src = ip_addr_v4 (&sa->iaddr).as_u32;
1359 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1360 clib_host_to_net_u64 (ike->ispi),
1361 clib_host_to_net_u64 (ike->rspi), src,
1362 ip_addr_version (&sa->raddr) == AF_IP4);
1364 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1367 goto cleanup_and_exit;
1369 /* process encrypted payload */
1371 while (payload != IKEV2_PAYLOAD_NONE)
1373 ikep = (ike_payload_header_t *) & plaintext[p];
1374 int current_length = dlen - p;
1375 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1376 goto cleanup_and_exit;
1378 if (payload == IKEV2_PAYLOAD_SA)
1380 proposal = ikev2_parse_sa_payload (ikep, current_length);
1382 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1384 n = ikev2_parse_notify_payload (ikep, current_length);
1385 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1390 else if (payload == IKEV2_PAYLOAD_DELETE)
1392 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1394 else if (payload == IKEV2_PAYLOAD_VENDOR)
1396 ikev2_parse_vendor_payload (ikep);
1398 else if (payload == IKEV2_PAYLOAD_NONCE)
1400 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1402 else if (payload == IKEV2_PAYLOAD_TSI)
1404 tsi = ikev2_parse_ts_payload (ikep, current_length);
1406 else if (payload == IKEV2_PAYLOAD_TSR)
1408 tsr = ikev2_parse_ts_payload (ikep, current_length);
1412 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1414 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1416 sa->unsupported_cp = payload;
1417 goto cleanup_and_exit;
1420 payload = ikep->nextpayload;
1424 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP)
1425 goto cleanup_and_exit;
1427 if (sa->is_initiator)
1430 if (vec_len (rekey) == 0)
1431 goto cleanup_and_exit;
1432 rekey->protocol_id = proposal->protocol_id;
1434 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1435 rekey->i_proposal->spi = rekey->spi;
1436 rekey->r_proposal = proposal;
1440 vec_reset_length (sa->r_nonce);
1441 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1442 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1445 child_sa->rekey_retries = 0;
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);
1466 vec_reset_length (sa->i_nonce);
1467 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1468 /* generate new Nr */
1469 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1470 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1474 /* create new child SA */
1475 vec_add2 (sa->new_child, rekey, 1);
1476 rekey->i_proposal = proposal;
1478 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1480 vec_reset_length (sa->i_nonce);
1481 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1482 /* generate new Nr */
1483 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1484 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1494 vec_free (proposal);
1501 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1509 ikev2_sa_transform_t *tr_prf;
1512 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1518 nonce = sa->i_nonce;
1519 packet_data = sa->last_sa_init_res_packet_data;
1525 nonce = sa->r_nonce;
1526 packet_data = sa->last_sa_init_req_packet_data;
1529 data = vec_new (u8, 4);
1531 vec_append (data, id->data);
1533 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1534 vec_append (authmsg, packet_data);
1535 vec_append (authmsg, nonce);
1536 vec_append (authmsg, id_hash);
1544 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1546 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1547 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1548 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1549 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1556 ikev2_sa_match_ts (ikev2_sa_t * sa)
1558 ikev2_main_t *km = &ikev2_main;
1560 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1561 ikev2_id_t *id_rem, *id_loc;
1564 pool_foreach (p, km->profiles) {
1566 if (sa->is_initiator)
1582 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1583 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1586 sa->profile_index = p - km->profiles;
1588 vec_foreach(ts, sa->childs[0].tsi)
1590 if (ikev2_ts_cmp(p_tsi, ts))
1592 vec_add1 (tsi, ts[0]);
1597 vec_foreach(ts, sa->childs[0].tsr)
1599 if (ikev2_ts_cmp(p_tsr, ts))
1601 vec_add1 (tsr, ts[0]);
1612 vec_free (sa->childs[0].tsi);
1613 vec_free (sa->childs[0].tsr);
1614 sa->childs[0].tsi = tsi;
1615 sa->childs[0].tsr = tsr;
1621 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1625 static ikev2_profile_t *
1626 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1627 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1629 ikev2_profile_t *ret = 0, *p;
1630 ikev2_id_t *id_rem, *id_loc;
1631 ikev2_auth_t *sa_auth;
1632 u8 *authmsg, *psk = 0, *auth = 0;
1634 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1636 if (sa->is_initiator)
1640 sa_auth = &sa->r_auth;
1646 sa_auth = &sa->i_auth;
1649 pool_foreach (p, km->profiles)
1652 if (!ikev2_is_id_equal (&p->rem_id, id_rem) ||
1653 !ikev2_is_id_equal (&p->loc_id, id_loc))
1656 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1658 if (!p->auth.data ||
1659 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1662 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1663 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1665 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1667 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1674 ikev2_elog_uint (IKEV2_LOG_ERROR,
1675 "shared key mismatch! ispi %lx", sa->ispi);
1678 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1680 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1683 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1685 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1691 ikev2_elog_uint (IKEV2_LOG_ERROR,
1692 "cert verification failed! ispi %lx", sa->ispi);
1701 ikev2_sa_auth (ikev2_sa_t *sa)
1703 ikev2_main_t *km = &ikev2_main;
1704 ikev2_profile_t *sel_p = 0;
1705 ikev2_sa_transform_t *tr_prf;
1706 u8 *psk, *authmsg, *key_pad;
1709 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1711 /* only shared key and rsa signature */
1712 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1713 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1715 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1717 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1721 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1722 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1726 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1727 sa->udp_encap = sel_p->udp_encap;
1728 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1730 if (!sa->is_initiator)
1732 vec_free (sa->r_id.data);
1733 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1734 sa->r_id.type = sel_p->loc_id.type;
1735 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1736 sa->i_id.type = sel_p->rem_id.type;
1738 /* generate our auth data */
1739 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1740 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1742 vec_free (sa->r_auth.data);
1743 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1744 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1745 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1748 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1750 vec_free (sa->r_auth.data);
1751 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1752 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1756 /* select transforms for 1st child sa */
1757 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1758 sa->childs[0].r_proposals =
1759 ikev2_select_proposal (sa->childs[0].i_proposals,
1760 IKEV2_PROTOCOL_ESP);
1762 if (~0 != sel_p->tun_itf)
1764 sa->is_tun_itf_set = 1;
1765 sa->tun_itf = sel_p->tun_itf;
1771 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1772 "profile found! ispi %lx", sa->ispi);
1773 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1779 ikev2_sa_auth_init (ikev2_sa_t * sa)
1781 ikev2_main_t *km = &ikev2_main;
1782 u8 *authmsg, *key_pad, *psk = 0;
1783 ikev2_sa_transform_t *tr_prf;
1786 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1788 /* only shared key and rsa signature */
1789 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1790 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1792 ikev2_elog_uint (IKEV2_LOG_ERROR,
1793 "unsupported authentication method %u",
1795 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1799 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1801 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1803 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1804 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1805 vec_free (sa->i_auth.data);
1806 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1807 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1811 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1813 vec_free (sa->i_auth.data);
1814 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1815 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1821 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1823 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1827 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1829 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1839 ipsec_sa_flags_t flags;
1842 ipsec_crypto_alg_t encr_type;
1843 ipsec_integ_alg_t integ_type;
1844 ip_address_t local_ip;
1845 ip_address_t remote_ip;
1846 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1848 u32 old_remote_sa_id;
1849 u16 ipsec_over_udp_port;
1852 } ikev2_add_ipsec_tunnel_args_t;
1855 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1857 ikev2_main_t *km = &ikev2_main;
1861 .t_flags = TUNNEL_FLAG_NONE,
1862 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1864 .t_mode = TUNNEL_MODE_P2P,
1867 .t_src = a->local_ip,
1868 .t_dst = a->remote_ip,
1870 tunnel_t tun_out = {
1871 .t_flags = TUNNEL_FLAG_NONE,
1872 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1874 .t_mode = TUNNEL_MODE_P2P,
1877 .t_src = a->remote_ip,
1878 .t_dst = a->local_ip,
1881 if (~0 == a->sw_if_index)
1883 /* no tunnel associated with the SA/profile - create a new one */
1884 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1885 &ip_addr_46 (&a->remote_ip), 0,
1886 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1887 TUNNEL_MODE_P2P, &sw_if_index);
1889 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1891 if (hash_get (km->sw_if_indices, sw_if_index))
1892 /* interface is managed by IKE; proceed with updating SAs */
1895 hash_set1 (km->sw_if_indices, sw_if_index);
1899 sw_if_index = a->sw_if_index;
1900 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1905 ikev2_elog_uint (IKEV2_LOG_ERROR,
1906 "installing ipip tunnel failed! local spi: %x",
1912 vec_add1 (sas_in, a->remote_sa_id);
1915 ipsec_tun_protect_del (sw_if_index, NULL);
1917 /* replace local SA immediately */
1918 ipsec_sa_unlock_id (a->local_sa_id);
1920 /* keep the old sa */
1921 vec_add1 (sas_in, a->old_remote_sa_id);
1924 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1925 a->encr_type, &a->loc_ckey, a->integ_type,
1926 &a->loc_ikey, a->flags, a->salt_local,
1927 a->src_port, a->dst_port, &tun_out, NULL);
1931 rv = ipsec_sa_add_and_lock (
1932 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1933 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1934 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1935 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
1939 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1946 ipsec_sa_unlock_id (a->remote_sa_id);
1948 ipsec_sa_unlock_id (a->local_sa_id);
1954 ikev2_create_tunnel_interface (vlib_main_t * vm,
1956 ikev2_child_sa_t * child, u32 sa_index,
1957 u32 child_index, u8 is_rekey)
1959 u32 thread_index = vlib_get_thread_index ();
1960 ikev2_main_t *km = &ikev2_main;
1961 ipsec_crypto_alg_t encr_type;
1962 ipsec_integ_alg_t integ_type;
1963 ikev2_profile_t *p = 0;
1964 ikev2_sa_transform_t *tr;
1965 ikev2_sa_proposal_t *proposals;
1967 ikev2_add_ipsec_tunnel_args_t a;
1969 clib_memset (&a, 0, sizeof (a));
1971 if (!child->r_proposals)
1973 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1977 if (sa->is_initiator)
1979 ip_address_copy (&a.local_ip, &sa->iaddr);
1980 ip_address_copy (&a.remote_ip, &sa->raddr);
1981 proposals = child->r_proposals;
1982 a.local_spi = child->r_proposals[0].spi;
1983 a.remote_spi = child->i_proposals[0].spi;
1987 ip_address_copy (&a.local_ip, &sa->raddr);
1988 ip_address_copy (&a.remote_ip, &sa->iaddr);
1989 proposals = child->i_proposals;
1990 a.local_spi = child->i_proposals[0].spi;
1991 a.remote_spi = child->r_proposals[0].spi;
1994 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1997 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1998 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2000 if (ikev2_natt_active (sa))
2001 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2002 a.is_rekey = is_rekey;
2004 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2005 if (tr && tr->esn_type)
2006 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2008 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2011 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2013 switch (tr->key_len)
2016 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2019 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2022 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2025 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2030 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2033 switch (tr->key_len)
2036 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2039 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2042 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2045 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2053 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2059 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2062 a.encr_type = encr_type;
2066 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2069 switch (tr->integ_type)
2071 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2072 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2074 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2075 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2077 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2078 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2080 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2081 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2084 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2090 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2096 integ_type = IPSEC_INTEG_ALG_NONE;
2099 a.integ_type = integ_type;
2100 ikev2_calc_child_keys (sa, child);
2102 if (sa->is_initiator)
2104 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2105 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2106 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2107 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2110 a.salt_remote = child->salt_er;
2111 a.salt_local = child->salt_ei;
2113 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2117 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2118 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2119 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2120 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2123 a.salt_remote = child->salt_ei;
2124 a.salt_local = child->salt_er;
2127 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2128 a.src_port = sa->ipsec_over_udp_port;
2131 if (sa->is_initiator && sa->profile_index != ~0)
2132 p = pool_elt_at_index (km->profiles, sa->profile_index);
2134 if (p && p->lifetime)
2136 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2137 if (p->lifetime_jitter)
2139 // This is not much better than rand(3), which Coverity warns
2140 // is unsuitable for security applications; random_u32 is
2141 // however fast. If this perturbance to the expiration time
2142 // needs to use a better RNG then we may need to use something
2143 // like /dev/urandom which has significant overhead.
2144 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2145 rnd = random_u32 (&rnd);
2147 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2151 if (thread_index & 0xffffffc0)
2152 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2154 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2155 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2157 child->local_sa_id =
2159 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2161 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2166 /* create a new remote SA ID to keep the old SA for a bit longer
2167 * so the peer has some time to swap their SAs */
2169 /* use most significat bit of child index part in id */
2171 if (sa->current_remote_id_mask)
2173 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2174 sa->current_remote_id_mask = 0;
2178 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2179 sa->current_remote_id_mask = mask;
2180 remote_sa_id |= mask;
2182 sa->old_id_expiration = 3.0;
2183 sa->old_remote_id_present = 1;
2186 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2188 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2189 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2191 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2192 (u8 *) & a, sizeof (a));
2198 ip46_address_t local_ip;
2199 ip46_address_t remote_ip;
2203 } ikev2_del_ipsec_tunnel_args_t;
2205 static_always_inline u32
2206 ikev2_flip_alternate_sa_bit (u32 id)
2215 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2217 ikev2_main_t *km = &ikev2_main;
2218 ipip_tunnel_t *ipip = NULL;
2221 if (~0 == a->sw_if_index)
2224 ipip_tunnel_key_t key = {
2226 .dst = a->remote_ip,
2227 .transport = IPIP_TRANSPORT_IP4,
2232 ipip = ipip_tunnel_db_find (&key);
2236 sw_if_index = ipip->sw_if_index;
2237 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2244 sw_if_index = a->sw_if_index;
2245 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2248 if (~0 != sw_if_index)
2249 ipsec_tun_protect_del (sw_if_index, NULL);
2251 ipsec_sa_unlock_id (a->remote_sa_id);
2252 ipsec_sa_unlock_id (a->local_sa_id);
2253 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2256 ipip_del_tunnel (ipip->sw_if_index);
2260 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2261 ikev2_child_sa_t * child)
2263 ikev2_del_ipsec_tunnel_args_t a;
2265 clib_memset (&a, 0, sizeof (a));
2267 if (sa->is_initiator)
2269 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2270 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2274 ip_address_to_46 (&sa->raddr, &a.local_ip);
2275 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2278 a.remote_sa_id = child->remote_sa_id;
2279 a.local_sa_id = child->local_sa_id;
2280 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2282 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2288 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2289 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2291 ikev2_main_t *km = &ikev2_main;
2292 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2294 ike_payload_header_t *ph;
2298 ikev2_sa_transform_t *tr_encr, *tr_integ;
2300 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2302 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2304 ikev2_payload_chain_t *chain = 0;
2305 ikev2_payload_new_chain (chain);
2307 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2309 if (sa->r_proposals == 0)
2311 ikev2_payload_add_notify (chain,
2312 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2313 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2315 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2317 u8 *data = vec_new (u8, 2);
2318 ikev2_sa_transform_t *tr_dh;
2320 ikev2_sa_get_td_for_type (sa->r_proposals,
2321 IKEV2_TRANSFORM_TYPE_DH);
2322 ASSERT (tr_dh && tr_dh->dh_type);
2324 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2325 data[1] = (tr_dh->dh_type) & 0xff;
2327 ikev2_payload_add_notify (chain,
2328 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2331 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2333 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2335 u8 *data = vec_new (u8, 1);
2337 data[0] = sa->unsupported_cp;
2338 ikev2_payload_add_notify (chain,
2339 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2347 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2348 ikev2_payload_add_sa (chain, sa->r_proposals);
2349 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2350 ikev2_payload_add_nonce (chain, sa->r_nonce);
2352 u8 *nat_detection_sha1 =
2353 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2354 clib_host_to_net_u64 (sa->rspi),
2355 &sa->raddr, udp->dst_port);
2356 ikev2_payload_add_notify (chain,
2357 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2358 nat_detection_sha1);
2359 vec_free (nat_detection_sha1);
2360 nat_detection_sha1 =
2361 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2362 clib_host_to_net_u64 (sa->rspi),
2363 &sa->iaddr, udp->src_port);
2364 ikev2_payload_add_notify (chain,
2365 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2366 nat_detection_sha1);
2367 vec_free (nat_detection_sha1);
2370 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2372 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2374 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2375 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2376 ikev2_payload_add_auth (chain, &sa->r_auth);
2377 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2378 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2379 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2381 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2383 ikev2_payload_add_notify (chain,
2384 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2386 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2388 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2390 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2392 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2393 ikev2_payload_add_auth (chain, &sa->r_auth);
2395 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2397 ikev2_payload_add_notify (chain,
2398 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2399 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2400 ikev2_payload_add_auth (chain, &sa->r_auth);
2401 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2402 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2404 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2406 u8 *data = vec_new (u8, 1);
2408 data[0] = sa->unsupported_cp;
2409 ikev2_payload_add_notify (chain,
2410 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2414 else if (sa->state == IKEV2_STATE_SA_INIT)
2416 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2417 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2418 ikev2_payload_add_auth (chain, &sa->i_auth);
2419 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2420 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2421 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2422 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2427 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2431 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2433 /* if pending delete */
2436 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2438 if (ike_hdr_is_request (ike))
2439 ikev2_payload_add_delete (chain, sa->del);
2441 /* The response to a request that deletes the IKE SA is an empty
2442 INFORMATIONAL response. */
2443 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2445 /* The response to a request that deletes ESP or AH SAs will contain
2446 delete payloads for the paired SAs going in the other direction. */
2449 ikev2_payload_add_delete (chain, sa->del);
2454 /* received N(AUTHENTICATION_FAILED) */
2455 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2457 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2460 /* received unsupported critical payload */
2461 else if (sa->unsupported_cp)
2463 u8 *data = vec_new (u8, 1);
2465 data[0] = sa->unsupported_cp;
2466 ikev2_payload_add_notify (chain,
2467 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2470 sa->unsupported_cp = 0;
2473 /* else send empty response */
2475 if (ike_hdr_is_response (ike))
2477 ASSERT (stats != 0);
2478 stats->n_keepalives++;
2479 sa->stats.n_keepalives++;
2483 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2485 if (sa->is_initiator)
2488 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2489 ikev2_notify_t notify;
2490 u8 *data = vec_new (u8, 4);
2491 clib_memset (¬ify, 0, sizeof (notify));
2492 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2493 notify.spi = sa->childs[0].i_proposals->spi;
2494 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2496 ikev2_payload_add_sa (chain, proposals);
2497 ikev2_payload_add_nonce (chain, sa->i_nonce);
2498 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2499 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2500 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2505 else if (vec_len (sa->rekey) > 0)
2507 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2508 ikev2_payload_add_nonce (chain, sa->r_nonce);
2509 ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
2510 ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
2511 vec_del1 (sa->rekey, 0);
2513 else if (vec_len (sa->new_child) > 0)
2515 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2516 ikev2_payload_add_nonce (chain, sa->r_nonce);
2517 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2519 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2521 vec_del1 (sa->new_child, 0);
2523 else if (sa->unsupported_cp)
2525 u8 *data = vec_new (u8, 1);
2527 data[0] = sa->unsupported_cp;
2528 ikev2_payload_add_notify (
2529 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2531 sa->unsupported_cp = 0;
2535 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2541 ike->version = IKE_VERSION_2;
2542 ike->nextpayload = IKEV2_PAYLOAD_SK;
2543 tlen = sizeof (*ike);
2545 if (sa->is_initiator)
2546 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2548 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2550 tlen += vec_len (chain->data);
2551 ike->nextpayload = chain->first_payload_type;
2552 ike->length = clib_host_to_net_u32 (tlen);
2554 if (tlen + b->current_length + b->current_data > buffer_data_size)
2560 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2562 /* store whole IKE payload - needed for PSK auth */
2563 vec_reset_length (sa->last_sa_init_res_packet_data);
2564 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2568 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2569 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2572 plen = sizeof (*ph);
2573 ph = (ike_payload_header_t *) & ike->payload[0];
2574 ph->nextpayload = chain->first_payload_type;
2577 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2578 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2579 plen += vec_len (chain->data) + iv_len;
2581 /* add space for hmac/tag */
2583 plen += tr_integ->key_trunc;
2585 plen += IKEV2_GCM_ICV_SIZE;
2588 if (tlen + b->current_length + b->current_data > buffer_data_size)
2594 /* payload and total length */
2595 ph->length = clib_host_to_net_u16 (plen);
2596 ike->length = clib_host_to_net_u32 (tlen);
2600 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2601 ph->payload, (u8 *) ike,
2602 sizeof (*ike) + sizeof (*ph),
2603 ph->payload + plen - sizeof (*ph) -
2604 IKEV2_GCM_ICV_SIZE))
2612 if (!ikev2_encrypt_data
2613 (ptd, sa, tr_encr, chain->data, ph->payload))
2619 ikev2_calc_integr (tr_integ,
2620 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2621 (u8 *) ike, tlen - tr_integ->key_trunc);
2622 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2623 sizeof (*ike), integ, tr_integ->key_trunc);
2626 /* store whole IKE payload - needed for retransmit */
2627 vec_reset_length (sa->last_res_packet_data);
2628 vec_add (sa->last_res_packet_data, ike, tlen);
2632 ikev2_payload_destroy_chain (chain);
2638 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2639 ip_address_t iaddr, ip_address_t raddr,
2644 u8 payload = ike->nextpayload;
2646 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2647 ip_address_cmp (&sa->iaddr, &iaddr) ||
2648 ip_address_cmp (&sa->raddr, &raddr))
2653 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2655 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2656 u32 plen = clib_net_to_host_u16 (ikep->length);
2658 if (plen < sizeof (ike_payload_header_t))
2661 if (payload == IKEV2_PAYLOAD_NONCE &&
2662 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2664 /* req is retransmit */
2665 if (sa->state == IKEV2_STATE_SA_INIT)
2667 sa->stats.n_init_retransmit++;
2668 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2669 u32 slen = clib_net_to_host_u32 (tmp->length);
2670 ike->ispi = tmp->ispi;
2671 ike->rspi = tmp->rspi;
2672 ike->nextpayload = tmp->nextpayload;
2673 ike->version = tmp->version;
2674 ike->exchange = tmp->exchange;
2675 ike->flags = tmp->flags;
2676 ike->msgid = tmp->msgid;
2677 ike->length = tmp->length;
2678 clib_memcpy_fast (ike->payload, tmp->payload,
2679 slen - sizeof (*ike));
2680 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2681 "ispi %lx IKE_SA_INIT retransmit "
2682 "from %d.%d.%d.%d to %d.%d.%d.%d",
2684 ip_addr_v4 (&raddr).as_u32,
2685 ip_addr_v4 (&iaddr).as_u32);
2688 /* else ignore req */
2691 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2692 "ispi %lx IKE_SA_INIT ignore "
2693 "from %d.%d.%d.%d to %d.%d.%d.%d",
2695 ip_addr_v4 (&raddr).as_u32,
2696 ip_addr_v4 (&iaddr).as_u32);
2700 payload = ikep->nextpayload;
2708 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2709 ip_address_t raddr, u32 rlen)
2713 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2716 pool_foreach (sa, ptd->sas) {
2717 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2723 /* req is not retransmit */
2728 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2730 if (ike_hdr_is_response (ike))
2733 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2736 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2738 sa->last_msg_id = msg_id;
2742 /* retransmitted req */
2743 if (msg_id == sa->last_msg_id)
2745 sa->stats.n_retransmit++;
2746 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2747 u32 slen = clib_net_to_host_u32 (tmp->length);
2748 ike->ispi = tmp->ispi;
2749 ike->rspi = tmp->rspi;
2750 ike->nextpayload = tmp->nextpayload;
2751 ike->version = tmp->version;
2752 ike->exchange = tmp->exchange;
2753 ike->flags = tmp->flags;
2754 ike->msgid = tmp->msgid;
2755 ike->length = tmp->length;
2756 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2757 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2758 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2759 ip_addr_v4 (&sa->iaddr).as_u32);
2763 /* old req ignore */
2764 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2765 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2766 ip_addr_v4 (&sa->iaddr).as_u32);
2771 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2773 ikev2_main_t *km = &ikev2_main;
2774 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2775 sa->profile_index = ~0;
2779 ikev2_del_sa_init_from_main (u64 * ispi)
2781 ikev2_main_t *km = &ikev2_main;
2782 uword *p = hash_get (km->sa_by_ispi, *ispi);
2785 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2786 hash_unset (km->sa_by_ispi, sai->ispi);
2787 ikev2_sa_free_all_vec (sai);
2788 pool_put (km->sais, sai);
2793 ikev2_del_sa_init (u64 ispi)
2795 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2799 static_always_inline void
2800 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2802 if (sa->is_initiator)
2804 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2805 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2809 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2810 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2814 static_always_inline void
2815 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2817 if (sa->is_initiator)
2819 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2820 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2824 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2825 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2829 static_always_inline void
2830 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2831 const ip_address_family_t af)
2833 ip_address_set (&sa->raddr, raddr, af);
2834 ip_address_set (&sa->iaddr, iaddr, af);
2838 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2839 ip6_header_t * ip6, u8 is_ip4)
2844 src = ip4->src_address.as_u32;
2845 dst = ip4->dst_address.as_u32;
2849 src = ip6->src_address.as_u32[3];
2850 dst = ip6->dst_address.as_u32[3];
2852 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2853 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2854 exchange, src, dst);
2858 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2860 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2862 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2865 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2866 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2867 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2868 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2872 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2874 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2876 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2878 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2880 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2884 static_always_inline uword
2885 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2886 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2888 u32 n_left = frame->n_vectors, *from;
2889 ikev2_main_t *km = &ikev2_main;
2890 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2891 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2892 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2893 ikev2_stats_t _stats, *stats = &_stats;
2896 /* no NAT traversal for ip6 */
2897 ASSERT (!natt || is_ip4);
2899 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2900 from = vlib_frame_vector_args (frame);
2901 vlib_get_buffers (vm, from, bufs, n_left);
2906 vlib_buffer_t *b0 = b[0];
2907 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2908 : IKEV2_NEXT_IP6_ERROR_DROP;
2909 ip4_header_t *ip40 = 0;
2910 ip6_header_t *ip60 = 0;
2913 ikev2_sa_t *sa0 = 0;
2914 ikev2_sa_t sa; /* temporary store for SA */
2921 u8 *ptr = vlib_buffer_get_current (b0);
2922 ip40 = (ip4_header_t *) ptr;
2923 ptr += sizeof (*ip40);
2924 udp0 = (udp_header_t *) ptr;
2925 ptr += sizeof (*udp0);
2926 ike0 = (ike_header_t *) ptr;
2927 ip_hdr_sz = sizeof (*ip40);
2931 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2932 ike0 = vlib_buffer_get_current (b0);
2933 vlib_buffer_advance (b0, -sizeof (*udp0));
2934 udp0 = vlib_buffer_get_current (b0);
2938 ip40 = (ip4_header_t *) ipx_hdr;
2939 ip_hdr_sz = sizeof (*ip40);
2943 ip60 = (ip6_header_t *) ipx_hdr;
2944 ip_hdr_sz = sizeof (*ip60);
2946 vlib_buffer_advance (b0, -ip_hdr_sz);
2949 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2951 /* check for non-esp marker */
2954 ASSERT (*((u32 *) ike0) == 0);
2956 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2957 rlen -= sizeof (ikev2_non_esp_marker);
2960 if (clib_net_to_host_u32 (ike0->length) != rlen)
2962 vlib_node_increment_counter (vm, node->node_index,
2963 IKEV2_ERROR_BAD_LENGTH, 1);
2967 if (ike0->version != IKE_VERSION_2)
2969 vlib_node_increment_counter (vm, node->node_index,
2970 IKEV2_ERROR_NOT_IKEV2, 1);
2974 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2977 clib_memset (sa0, 0, sizeof (*sa0));
2979 if (ike_hdr_is_initiator (ike0))
2981 sa0->stats.n_sa_init_req++;
2982 stats->n_sa_init_req++;
2983 if (ike0->rspi == 0)
2986 ikev2_set_ip_address (sa0, &ip40->src_address,
2987 &ip40->dst_address, AF_IP4);
2989 ikev2_set_ip_address (sa0, &ip60->src_address,
2990 &ip60->dst_address, AF_IP6);
2992 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2995 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2999 vlib_node_increment_counter (vm, node->node_index,
3002 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3004 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3009 res = ikev2_process_sa_init_req (
3010 vm, sa0, ike0, udp0, rlen,
3011 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3013 vlib_node_increment_counter (vm, node->node_index,
3014 IKEV2_ERROR_MALFORMED_PACKET,
3017 if (sa0->state == IKEV2_STATE_SA_INIT)
3019 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3021 ikev2_select_proposal (sa0->i_proposals,
3022 IKEV2_PROTOCOL_IKE);
3023 ikev2_generate_sa_init_data_and_log (sa0);
3026 if (sa0->state == IKEV2_STATE_SA_INIT
3027 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3029 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3031 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3033 vlib_node_increment_counter (vm, node->node_index,
3034 IKEV2_ERROR_NO_BUFF_SPACE,
3038 if (sa0->state == IKEV2_STATE_SA_INIT)
3040 /* add SA to the pool */
3041 pool_get (ptd->sas, sa0);
3042 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3043 ikev2_init_sa (vm, sa0);
3044 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3048 ikev2_sa_free_all_vec (sa0);
3052 else //received sa_init without initiator flag
3055 ikev2_set_ip_address (sa0, &ip40->dst_address,
3056 &ip40->src_address, AF_IP4);
3058 ikev2_set_ip_address (sa0, &ip60->dst_address,
3059 &ip60->src_address, AF_IP6);
3061 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3063 if (sa0->state == IKEV2_STATE_SA_INIT)
3066 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3067 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3070 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3072 if (clib_atomic_bool_cmp_and_swap
3073 (&sai->init_response_received, 0, 1))
3075 ikev2_complete_sa_data (sa0, sai);
3076 ikev2_calc_keys (sa0);
3077 ikev2_sa_auth_init (sa0);
3078 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3080 clib_net_to_host_u32 (sai->last_init_msg_id);
3081 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3082 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3085 vlib_node_increment_counter (vm,
3087 IKEV2_ERROR_NO_BUFF_SPACE,
3092 /* we've already processed sa-init response */
3093 sa0->state = IKEV2_STATE_UNKNOWN;
3098 if (sa0->state == IKEV2_STATE_SA_INIT)
3100 /* add SA to the pool */
3101 pool_get (ptd->sas, sa0);
3102 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3103 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3107 ikev2_sa_free_all_vec (sa0);
3111 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3114 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3117 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3118 slen = ikev2_retransmit_resp (sa0, ike0);
3121 vlib_node_increment_counter (vm, node->node_index,
3124 IKEV2_ERROR_IKE_REQ_IGNORE
3126 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3131 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3132 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3134 ikev2_sa_auth (sa0);
3136 vlib_node_increment_counter (vm, node->node_index,
3137 IKEV2_ERROR_MALFORMED_PACKET, 1);
3138 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3140 ikev2_initial_contact_cleanup (ptd, sa0);
3141 ikev2_sa_match_ts (sa0);
3142 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3143 ikev2_create_tunnel_interface (vm, sa0,
3148 if (sa0->is_initiator)
3150 sa0->last_msg_id = ~0;
3151 ikev2_del_sa_init (sa0->ispi);
3155 sa0->stats.n_sa_auth_req++;
3156 stats->n_sa_auth_req++;
3157 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3159 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3161 vlib_node_increment_counter (vm, node->node_index,
3162 IKEV2_ERROR_NO_BUFF_SPACE,
3167 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3170 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3173 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3174 slen = ikev2_retransmit_resp (sa0, ike0);
3177 vlib_node_increment_counter (vm, node->node_index,
3180 IKEV2_ERROR_IKE_REQ_IGNORE
3182 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3187 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3190 vlib_node_increment_counter (vm, node->node_index,
3191 IKEV2_ERROR_MALFORMED_PACKET,
3199 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3201 ikev2_delete_t *d, *tmp, *resp = 0;
3202 vec_foreach (d, sa0->del)
3204 ikev2_child_sa_t *ch_sa;
3205 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3207 !sa0->is_initiator);
3210 ikev2_delete_tunnel_interface (km->vnet_main,
3212 if (!sa0->is_initiator)
3214 vec_add2 (resp, tmp, 1);
3215 tmp->protocol_id = d->protocol_id;
3216 tmp->spi = ch_sa->r_proposals[0].spi;
3218 ikev2_sa_del_child_sa (sa0, ch_sa);
3221 if (!sa0->is_initiator)
3223 vec_free (sa0->del);
3228 if (ike_hdr_is_request (ike0))
3230 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3232 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3234 vlib_node_increment_counter (vm, node->node_index,
3235 IKEV2_ERROR_NO_BUFF_SPACE,
3240 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3243 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3246 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3247 slen = ikev2_retransmit_resp (sa0, ike0);
3250 vlib_node_increment_counter (vm, node->node_index,
3253 IKEV2_ERROR_IKE_REQ_IGNORE
3255 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3260 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3263 vlib_node_increment_counter (vm, node->node_index,
3264 IKEV2_ERROR_MALFORMED_PACKET,
3272 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3275 ikev2_sa_free_all_child_sa (&sa0->childs);
3276 ikev2_child_sa_t *child;
3277 vec_add2 (sa0->childs, child, 1);
3278 clib_memset (child, 0, sizeof (*child));
3279 child->r_proposals = sa0->rekey[0].r_proposal;
3280 child->i_proposals = sa0->rekey[0].i_proposal;
3281 child->tsi = sa0->rekey[0].tsi;
3282 child->tsr = sa0->rekey[0].tsr;
3283 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3284 child - sa0->childs, 1);
3286 if (ike_hdr_is_response (ike0))
3288 vec_free (sa0->rekey);
3292 stats->n_rekey_req++;
3293 sa0->stats.n_rekey_req++;
3294 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3296 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3298 vlib_node_increment_counter (vm, node->node_index,
3299 IKEV2_ERROR_NO_BUFF_SPACE,
3303 else if (sa0->new_child)
3305 ikev2_child_sa_t *c;
3306 vec_add2 (sa0->childs, c, 1);
3307 memset (c, 0, sizeof (*c));
3308 c->r_proposals = sa0->new_child[0].r_proposal;
3309 c->i_proposals = sa0->new_child[0].i_proposal;
3310 c->tsi = sa0->new_child[0].tsi;
3311 c->tsr = sa0->new_child[0].tsr;
3312 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3313 c - sa0->childs, 0);
3314 if (ike_hdr_is_request (ike0))
3316 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3318 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3320 vlib_node_increment_counter (
3321 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3328 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3332 /* if we are sending packet back, rewrite headers */
3333 if (slen && ~0 != slen)
3337 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3338 ikev2_rewrite_v4_addrs (sa0, ip40);
3342 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3343 ikev2_rewrite_v6_addrs (sa0, ip60);
3348 udp0->dst_port = udp0->src_port =
3349 clib_net_to_host_u16 (ikev2_get_port (sa0));
3351 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3352 && ikev2_natt_active (sa0))
3355 slen = ikev2_insert_non_esp_marker (ike0, slen);
3361 slen += sizeof (ikev2_non_esp_marker);
3363 u16 tp = udp0->dst_port;
3364 udp0->dst_port = udp0->src_port;
3365 udp0->src_port = tp;
3368 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3370 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3373 ip40->length = clib_host_to_net_u16 (b0->current_length);
3374 ip40->checksum = ip4_header_checksum (ip40);
3378 ip60->payload_length =
3379 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3383 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3384 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3386 ikev2_child_sa_t *c;
3388 vec_foreach (c, sa0->childs)
3389 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3391 ikev2_delete_sa (ptd, sa0);
3393 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3394 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3397 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3398 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3399 t->next_index = next[0];
3406 ikev2_update_stats (vm, node->node_index, stats);
3407 vlib_node_increment_counter (vm, node->node_index,
3408 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3409 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3410 return frame->n_vectors;
3414 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3416 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3420 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3421 vlib_frame_t *frame)
3423 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3427 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3429 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3433 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3434 .function = ikev2_ip4,
3435 .name = "ikev2-ip4",
3436 .vector_size = sizeof (u32),
3437 .format_trace = format_ikev2_trace,
3438 .type = VLIB_NODE_TYPE_INTERNAL,
3440 .n_errors = IKEV2_N_ERROR,
3441 .error_counters = ikev2_error_counters,
3443 .n_next_nodes = IKEV2_IP4_N_NEXT,
3445 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3446 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3450 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3451 .function = ikev2_ip4_natt,
3452 .name = "ikev2-ip4-natt",
3453 .vector_size = sizeof (u32),
3454 .format_trace = format_ikev2_trace,
3455 .type = VLIB_NODE_TYPE_INTERNAL,
3457 .n_errors = IKEV2_N_ERROR,
3458 .error_counters = ikev2_error_counters,
3460 .n_next_nodes = IKEV2_IP4_N_NEXT,
3462 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3463 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3467 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3468 .function = ikev2_ip6,
3469 .name = "ikev2-ip6",
3470 .vector_size = sizeof (u32),
3471 .format_trace = format_ikev2_trace,
3472 .type = VLIB_NODE_TYPE_INTERNAL,
3474 .n_errors = IKEV2_N_ERROR,
3475 .error_counters = ikev2_error_counters,
3477 .n_next_nodes = IKEV2_IP6_N_NEXT,
3479 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3480 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3485 // set ikev2 proposals when vpp is used as initiator
3486 static clib_error_t *
3487 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3488 ikev2_transforms_set * ts,
3489 ikev2_sa_proposal_t ** proposals, int is_ike)
3492 ikev2_main_t *km = &ikev2_main;
3493 ikev2_sa_proposal_t *proposal;
3494 vec_add2 (*proposals, proposal, 1);
3495 ikev2_sa_transform_t *td;
3500 vec_foreach (td, km->supported_transforms)
3502 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3503 && td->encr_type == ts->crypto_alg
3504 && td->key_len == ts->crypto_key_size / 8)
3507 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3508 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3509 vec_add (td->attrs, (u8 *) attr, 4);
3510 vec_add1 (proposal->transforms, *td);
3519 r = clib_error_return (0, "Unsupported algorithm");
3523 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3527 vec_foreach (td, km->supported_transforms)
3529 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3530 && td->integ_type == ts->integ_alg)
3532 vec_add1 (proposal->transforms, *td);
3540 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3541 r = clib_error_return (0, "Unsupported algorithm");
3550 vec_foreach (td, km->supported_transforms)
3552 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3553 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3555 vec_add1 (proposal->transforms, *td);
3562 r = clib_error_return (0, "Unsupported algorithm");
3571 vec_foreach (td, km->supported_transforms)
3573 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3575 vec_add1 (proposal->transforms, *td);
3578 sa->dh_group = td->dh_type;
3586 r = clib_error_return (0, "Unsupported algorithm");
3594 vec_foreach (td, km->supported_transforms)
3596 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3598 vec_add1 (proposal->transforms, *td);
3604 r = clib_error_return (0, "Unsupported algorithm");
3613 static ikev2_profile_t *
3614 ikev2_profile_index_by_name (u8 * name)
3616 ikev2_main_t *km = &ikev2_main;
3619 p = mhash_get (&km->profile_index_by_name, name);
3623 return pool_elt_at_index (km->profiles, p[0]);
3628 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3629 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3638 b0 = vlib_get_buffer (vm, bi0);
3639 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3640 udp0 = vlib_buffer_get_current (b0);
3641 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3642 udp0->src_port = clib_host_to_net_u16 (src_port);
3643 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3646 if (ip_addr_version (dst) == AF_IP4)
3648 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3649 ip40 = vlib_buffer_get_current (b0);
3650 ip40->ip_version_and_header_length = 0x45;
3652 ip40->fragment_id = 0;
3653 ip40->flags_and_fragment_offset = 0;
3655 ip40->protocol = IP_PROTOCOL_UDP;
3656 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3657 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3658 b0->current_length =
3659 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3660 ip40->length = clib_host_to_net_u16 (b0->current_length);
3661 ip40->checksum = ip4_header_checksum (ip40);
3665 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3666 ip60 = vlib_buffer_get_current (b0);
3668 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3669 ip60->ip_version_traffic_class_and_flow_label =
3670 clib_host_to_net_u32 (0x6 << 28);
3671 ip60->payload_length =
3672 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3673 ip60->protocol = IP_PROTOCOL_UDP;
3674 ip60->hop_limit = 0xff;
3675 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3676 sizeof (ip60->src_address));
3677 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3678 sizeof (ip60->src_address));
3681 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3682 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3683 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3685 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3686 ip4_lookup_node.index : ip6_lookup_node.index;
3688 /* send the request */
3689 f = vlib_get_frame_to_node (vm, next_index);
3690 to_next = vlib_frame_vector_args (f);
3693 vlib_put_frame_to_node (vm, next_index, f);
3698 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3701 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3706 *b = vlib_get_buffer (vm, bi0);
3711 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3713 ikev2_main_t *km = &ikev2_main;
3716 EVP_PKEY_free (km->pkey);
3717 km->pkey = ikev2_load_key_file (file);
3718 if (km->pkey == NULL)
3719 return clib_error_return (0, "load key '%s' failed", file);
3724 static_always_inline vnet_api_error_t
3725 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3727 ipsec_register_udp_port (port);
3728 p->ipsec_over_udp_port = port;
3732 static_always_inline void
3733 ikev2_unregister_udp_port (ikev2_profile_t * p)
3735 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3738 ipsec_unregister_udp_port (p->ipsec_over_udp_port);
3739 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3743 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3744 ikev2_main_per_thread_data_t * tkm,
3745 ikev2_sa_t * sa, u8 send_notification)
3747 ikev2_main_t *km = &ikev2_main;
3748 ip_address_t *src, *dst;
3750 ikev2_child_sa_t *c;
3752 /* Create the Initiator notification for IKE SA removal */
3757 vec_resize (sa->del, 1);
3758 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3759 sa->del->spi = sa->ispi;
3761 if (send_notification)
3763 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3766 ikev2_log_error ("buffer alloc failure");
3770 ike0 = vlib_buffer_get_current (b0);
3771 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3772 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3773 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3775 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3776 sa->last_init_msg_id += 1;
3777 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3781 if (ikev2_natt_active (sa))
3782 len = ikev2_insert_non_esp_marker (ike0, len);
3784 if (sa->is_initiator)
3795 ikev2_send_ike (vm, src, dst, bi0, len,
3796 ikev2_get_port (sa), sa->dst_port, 0);
3800 /* delete local SA */
3801 vec_foreach (c, sa->childs)
3802 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3804 u64 rspi = sa->rspi;
3805 ikev2_sa_free_all_vec (sa);
3806 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3809 hash_unset (tkm->sa_by_rspi, rspi);
3810 pool_put (tkm->sas, sa);
3815 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3817 ikev2_main_per_thread_data_t *tkm;
3819 u32 pi = p - km->profiles;
3824 pool_foreach (sa, km->sais) {
3825 if (pi == sa->profile_index)
3826 vec_add1 (del_sai, sa - km->sais);
3830 vec_foreach (sai, del_sai)
3832 sa = pool_elt_at_index (km->sais, sai[0]);
3833 ikev2_sa_free_all_vec (sa);
3834 hash_unset (km->sa_by_ispi, sa->ispi);
3835 pool_put (km->sais, sa);
3837 vec_reset_length (del_sai);
3839 vec_foreach (tkm, km->per_thread_data)
3842 pool_foreach (sa, tkm->sas) {
3843 if (sa->profile_index != ~0 && pi == sa->profile_index)
3844 vec_add1 (del_sai, sa - tkm->sas);
3848 vec_foreach (sai, del_sai)
3850 sa = pool_elt_at_index (tkm->sas, sai[0]);
3851 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3854 vec_reset_length (del_sai);
3861 ikev2_profile_responder_free (ikev2_responder_t *r)
3863 vec_free (r->hostname);
3867 ikev2_profile_free (ikev2_profile_t * p)
3871 vec_free (p->auth.data);
3873 EVP_PKEY_free (p->auth.key);
3875 ikev2_profile_responder_free (&p->responder);
3877 vec_free (p->loc_id.data);
3878 vec_free (p->rem_id.data);
3882 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3884 ikev2_main_t *km = &ikev2_main;
3889 if (ikev2_profile_index_by_name (name))
3890 return clib_error_return (0, "policy %v already exists", name);
3892 pool_get (km->profiles, p);
3893 clib_memset (p, 0, sizeof (*p));
3894 p->name = vec_dup (name);
3895 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3896 p->responder.sw_if_index = ~0;
3898 uword index = p - km->profiles;
3899 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3903 p = ikev2_profile_index_by_name (name);
3905 return clib_error_return (0, "policy %v does not exists", name);
3907 ikev2_unregister_udp_port (p);
3908 ikev2_cleanup_profile_sessions (km, p);
3910 ikev2_profile_free (p);
3911 pool_put (km->profiles, p);
3912 mhash_unset (&km->profile_index_by_name, name, 0);
3918 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3919 u8 * auth_data, u8 data_hex_format)
3924 p = ikev2_profile_index_by_name (name);
3928 r = clib_error_return (0, "unknown profile %v", name);
3933 EVP_PKEY_free (p->auth.key);
3934 vec_free (p->auth.data);
3936 p->auth.method = auth_method;
3937 p->auth.data = vec_dup (auth_data);
3938 p->auth.hex = data_hex_format;
3940 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3942 vec_add1 (p->auth.data, 0);
3943 p->auth.key = ikev2_load_cert_file (p->auth.data);
3944 if (p->auth.key == NULL)
3945 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3952 ikev2_is_id_supported (u8 id_type)
3954 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3955 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3956 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3957 id_type == IKEV2_ID_TYPE_ID_FQDN);
3961 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3967 if (!ikev2_is_id_supported (id_type))
3969 r = clib_error_return (0, "unsupported identity type %U",
3970 format_ikev2_id_type, id_type);
3974 p = ikev2_profile_index_by_name (name);
3978 r = clib_error_return (0, "unknown profile %v", name);
3984 vec_free (p->loc_id.data);
3985 p->loc_id.type = id_type;
3986 p->loc_id.data = vec_dup (data);
3990 vec_free (p->rem_id.data);
3991 p->rem_id.type = id_type;
3992 p->rem_id.data = vec_dup (data);
3998 static_always_inline void
3999 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
4001 if (ip_addr_version (addr) == AF_IP4)
4002 ts->ts_type = TS_IPV4_ADDR_RANGE;
4004 ts->ts_type = TS_IPV6_ADDR_RANGE;
4007 static_always_inline void
4008 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
4009 const ip_address_t * end)
4011 ip_address_copy (&ts->start_addr, start);
4012 ip_address_copy (&ts->end_addr, end);
4016 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4017 u16 start_port, u16 end_port, ip_address_t start_addr,
4018 ip_address_t end_addr, int is_local)
4023 p = ikev2_profile_index_by_name (name);
4027 r = clib_error_return (0, "unknown profile %v", name);
4031 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4032 return clib_error_return (0, "IP address version mismatch!");
4036 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4037 p->loc_ts.start_port = start_port;
4038 p->loc_ts.end_port = end_port;
4039 p->loc_ts.protocol_id = protocol_id;
4040 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4044 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4045 p->rem_ts.start_port = start_port;
4046 p->rem_ts.end_port = end_port;
4047 p->rem_ts.protocol_id = protocol_id;
4048 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4055 ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname,
4061 p = ikev2_profile_index_by_name (name);
4065 r = clib_error_return (0, "unknown profile %v", name);
4069 p->responder.is_resolved = 0;
4070 p->responder.sw_if_index = sw_if_index;
4071 p->responder.hostname = vec_dup (hostname);
4077 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4078 u32 sw_if_index, ip_address_t addr)
4083 p = ikev2_profile_index_by_name (name);
4087 r = clib_error_return (0, "unknown profile %v", name);
4091 p->responder.is_resolved = 1;
4092 p->responder.sw_if_index = sw_if_index;
4093 ip_address_copy (&p->responder.addr, &addr);
4099 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4100 ikev2_transform_encr_type_t crypto_alg,
4101 ikev2_transform_integ_type_t integ_alg,
4102 ikev2_transform_dh_type_t dh_type,
4103 u32 crypto_key_size)
4108 p = ikev2_profile_index_by_name (name);
4112 r = clib_error_return (0, "unknown profile %v", name);
4116 p->ike_ts.crypto_alg = crypto_alg;
4117 p->ike_ts.integ_alg = integ_alg;
4118 p->ike_ts.dh_type = dh_type;
4119 p->ike_ts.crypto_key_size = crypto_key_size;
4124 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4125 ikev2_transform_encr_type_t crypto_alg,
4126 ikev2_transform_integ_type_t integ_alg,
4127 u32 crypto_key_size)
4132 p = ikev2_profile_index_by_name (name);
4136 r = clib_error_return (0, "unknown profile %v", name);
4140 p->esp_ts.crypto_alg = crypto_alg;
4141 p->esp_ts.integ_alg = integ_alg;
4142 p->esp_ts.crypto_key_size = crypto_key_size;
4147 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4148 u8 * name, u32 sw_if_index)
4153 p = ikev2_profile_index_by_name (name);
4157 r = clib_error_return (0, "unknown profile %v", name);
4161 p->tun_itf = sw_if_index;
4167 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4170 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4171 vnet_api_error_t rv = 0;
4174 return VNET_API_ERROR_INVALID_VALUE;
4178 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4179 return VNET_API_ERROR_VALUE_EXIST;
4181 rv = ikev2_register_udp_port (p, port);
4185 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4186 return VNET_API_ERROR_INVALID_VALUE;
4188 ikev2_unregister_udp_port (p);
4194 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4196 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4201 r = clib_error_return (0, "unknown profile %v", name);
4210 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4211 u64 lifetime, u32 jitter, u32 handover,
4217 p = ikev2_profile_index_by_name (name);
4221 r = clib_error_return (0, "unknown profile %v", name);
4225 p->lifetime = lifetime;
4226 p->lifetime_jitter = jitter;
4227 p->handover = handover;
4228 p->lifetime_maxdata = maxdata;
4233 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4234 ip_address_t * out_addr)
4236 ip4_address_t *if_ip4;
4237 ip6_address_t *if_ip6;
4241 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4244 ip_address_set (out_addr, if_ip4, AF_IP4);
4250 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4253 ip_address_set (out_addr, if_ip6, AF_IP6);
4260 static clib_error_t *
4261 ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r)
4263 ikev2_main_t *km = &ikev2_main;
4264 dns_cache_entry_t *ep = 0;
4265 dns_pending_request_t _t0, *t0 = &_t0;
4266 dns_resolve_name_t _rn, *rn = &_rn;
4269 if (!km->dns_resolve_name)
4270 return clib_error_return (0, "cannot load symbols from dns plugin");
4272 t0->request_type = DNS_API_PENDING_NAME_TO_IP;
4273 rv = km->dns_resolve_name (r->hostname, &ep, t0, rn);
4275 return clib_error_return (0, "dns lookup failure");
4280 ip_address_copy (&r->addr, &rn->address);
4286 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4290 ikev2_main_t *km = &ikev2_main;
4294 int len = sizeof (ike_header_t), valid_ip = 0;
4295 ip_address_t src_if_ip = ip_address_initializer;
4297 p = ikev2_profile_index_by_name (name);
4301 r = clib_error_return (0, "unknown profile %v", name);
4305 if (p->responder.sw_if_index == ~0 ||
4306 (ip_address_is_zero (&p->responder.addr) &&
4307 vec_len (p->responder.hostname) == 0))
4309 r = clib_error_return (0, "responder not set for profile %v", name);
4313 if (!p->responder.is_resolved)
4315 /* try to resolve using dns plugin
4316 * success does not mean we have resolved the name */
4317 r = ikev2_resolve_responder_hostname (vm, &p->responder);
4322 if (p->responder.is_resolved &&
4323 ikev2_get_if_address (p->responder.sw_if_index,
4324 ip_addr_version (&p->responder.addr), &src_if_ip))
4329 /* Prepare the SA and the IKE payload */
4331 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4332 ikev2_payload_chain_t *chain = 0;
4333 ikev2_payload_new_chain (chain);
4335 /* Build the IKE proposal payload */
4336 ikev2_sa_proposal_t *proposals = 0;
4337 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4338 proposals[0].proposal_num = 1;
4339 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4341 /* Add and then cleanup proposal data */
4342 ikev2_payload_add_sa (chain, proposals);
4343 ikev2_sa_free_proposal_vector (&proposals);
4345 sa.is_initiator = 1;
4346 sa.profile_index = p - km->profiles;
4347 sa.state = IKEV2_STATE_SA_INIT;
4348 sa.tun_itf = p->tun_itf;
4349 sa.udp_encap = p->udp_encap;
4350 if (p->natt_disabled)
4351 sa.natt_state = IKEV2_NATT_DISABLED;
4352 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4353 sa.is_tun_itf_set = 1;
4354 sa.initial_contact = 1;
4355 sa.dst_port = IKEV2_PORT;
4357 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4358 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4360 ikev2_sa_free_all_vec (&sa);
4361 ikev2_payload_destroy_chain (chain);
4362 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4365 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4366 ikev2_payload_add_nonce (chain, sa.i_nonce);
4368 /* Build the child SA proposal */
4369 vec_resize (sa.childs, 1);
4370 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4371 &sa.childs[0].i_proposals, 0);
4372 sa.childs[0].i_proposals[0].proposal_num = 1;
4373 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4374 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4375 sizeof (sa.childs[0].i_proposals[0].spi));
4377 /* Add NAT detection notification messages (mandatory) */
4378 u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 (
4379 clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip,
4380 clib_host_to_net_u16 (IKEV2_PORT));
4382 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4383 nat_detection_sha1);
4384 vec_free (nat_detection_sha1);
4385 nat_detection_sha1 =
4386 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4387 clib_host_to_net_u64 (sa.rspi),
4389 clib_host_to_net_u16 (sa.dst_port));
4390 ikev2_payload_add_notify (chain,
4391 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4392 nat_detection_sha1);
4393 vec_free (nat_detection_sha1);
4395 u8 *sig_hash_algo = vec_new (u8, 8);
4396 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4397 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4398 ikev2_payload_add_notify (chain,
4399 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4401 vec_free (sig_hash_algo);
4403 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4406 ikev2_sa_free_all_vec (&sa);
4407 ikev2_payload_destroy_chain (chain);
4408 char *errmsg = "buffer alloc failure";
4409 ikev2_log_error (errmsg);
4410 return clib_error_return (0, errmsg);
4412 ike0 = vlib_buffer_get_current (b0);
4414 /* Buffer update and boilerplate */
4415 len += vec_len (chain->data);
4416 ike0->nextpayload = chain->first_payload_type;
4417 ike0->length = clib_host_to_net_u32 (len);
4418 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4419 ikev2_payload_destroy_chain (chain);
4421 ike0->version = IKE_VERSION_2;
4422 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4423 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4424 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4427 sa.last_init_msg_id += 1;
4429 /* store whole IKE payload - needed for PSK auth */
4430 vec_reset_length (sa.last_sa_init_req_packet_data);
4431 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4433 /* add data to the SA then add it to the pool */
4434 ip_address_copy (&sa.iaddr, &src_if_ip);
4435 ip_address_copy (&sa.raddr, &p->responder.addr);
4436 sa.i_id.type = p->loc_id.type;
4437 sa.i_id.data = vec_dup (p->loc_id.data);
4438 sa.r_id.type = p->rem_id.type;
4439 sa.r_id.data = vec_dup (p->rem_id.data);
4440 sa.i_auth.method = p->auth.method;
4441 sa.i_auth.hex = p->auth.hex;
4442 sa.i_auth.data = vec_dup (p->auth.data);
4443 sa.sw_if_index = p->responder.sw_if_index;
4444 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4445 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4447 ikev2_initial_contact_cleanup (0, &sa);
4449 /* add SA to the pool */
4450 ikev2_sa_t *sa0 = 0;
4451 pool_get (km->sais, sa0);
4452 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4453 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4457 ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT,
4458 sa.dst_port, sa.sw_if_index);
4461 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4462 clib_host_to_net_u64 (sa0->ispi), 0,
4463 ip_addr_v4 (&p->responder.addr).as_u32,
4464 ip_addr_version (&p->responder.addr) == AF_IP4);
4471 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4472 ikev2_child_sa_t * csa)
4474 /* Create the Initiator notification for child SA removal */
4475 ikev2_main_t *km = &ikev2_main;
4481 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4484 ikev2_log_error ("buffer alloc failure");
4488 ike0 = vlib_buffer_get_current (b0);
4489 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4490 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4491 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4493 vec_resize (sa->del, 1);
4494 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4495 sa->del->spi = csa->i_proposals->spi;
4496 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4497 sa->last_init_msg_id += 1;
4498 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4502 if (ikev2_natt_active (sa))
4503 len = ikev2_insert_non_esp_marker (ike0, len);
4504 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4505 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4507 /* delete local child SA */
4508 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4509 ikev2_sa_del_child_sa (sa, csa);
4513 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4516 ikev2_main_t *km = &ikev2_main;
4517 ikev2_main_per_thread_data_t *tkm;
4518 ikev2_sa_t *fsa = 0;
4519 ikev2_child_sa_t *fchild = 0;
4521 /* Search for the child SA */
4522 vec_foreach (tkm, km->per_thread_data)
4528 pool_foreach (sa, tkm->sas) {
4529 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4539 if (!fchild || !fsa)
4541 r = clib_error_return (0, "Child SA not found");
4546 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4553 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4556 ikev2_main_t *km = &ikev2_main;
4557 ikev2_main_per_thread_data_t *tkm;
4558 ikev2_sa_t *fsa = 0;
4559 ikev2_main_per_thread_data_t *ftkm = 0;
4561 /* Search for the IKE SA */
4562 vec_foreach (tkm, km->per_thread_data)
4568 pool_foreach (sa, tkm->sas) {
4569 if (sa->ispi == ispi)
4581 r = clib_error_return (0, "IKE SA not found");
4585 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4590 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4591 ikev2_child_sa_t * csa)
4593 /* Create the Initiator request for create child SA */
4599 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4602 ikev2_log_error ("buffer alloc failure");
4606 ike0 = vlib_buffer_get_current (b0);
4607 ike0->version = IKE_VERSION_2;
4608 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4609 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4610 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4611 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4612 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4613 sa->last_init_msg_id += 1;
4615 ikev2_rekey_t *rekey;
4616 vec_reset_length (sa->rekey);
4617 vec_add2 (sa->rekey, rekey, 1);
4618 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4621 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4622 rekey->spi = proposals[0].spi;
4623 rekey->ispi = csa->i_proposals->spi;
4624 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4628 if (ikev2_natt_active (sa))
4629 len = ikev2_insert_non_esp_marker (ike0, len);
4630 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4631 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4632 vec_free (proposals);
4636 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4639 ikev2_main_t *km = &ikev2_main;
4640 ikev2_main_per_thread_data_t *tkm;
4641 ikev2_sa_t *fsa = 0;
4642 ikev2_child_sa_t *fchild = 0;
4644 /* Search for the child SA */
4645 vec_foreach (tkm, km->per_thread_data)
4651 pool_foreach (sa, tkm->sas) {
4652 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4662 if (!fchild || !fsa)
4664 r = clib_error_return (0, "Child SA not found");
4669 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4676 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4678 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4682 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4684 u64 *ispi, *ispi_vec = 0;
4685 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4686 ikev2_main_t *km = &ikev2_main;
4687 ikev2_main_per_thread_data_t *tkm;
4688 p->responder.sw_if_index = ~0;
4690 vec_foreach (tkm, km->per_thread_data)
4693 pool_foreach (sa, tkm->sas) {
4694 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4695 vec_add1 (sa_vec, sa);
4699 vec_foreach (sap, sa_vec)
4701 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4703 vec_reset_length (sa_vec);
4708 pool_foreach (sa, km->sais) {
4709 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4710 vec_add1 (ispi_vec, sa->ispi);
4714 vec_foreach (ispi, ispi_vec)
4716 ikev2_del_sa_init_from_main (ispi);
4719 vec_free (ispi_vec);
4722 static clib_error_t *
4723 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4725 ikev2_main_t *km = &ikev2_main;
4732 pool_foreach (p, km->profiles) {
4733 if (p->responder.sw_if_index == sw_if_index)
4734 ikev2_sa_del (p, sw_if_index);
4741 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4744 ikev2_init (vlib_main_t * vm)
4746 ikev2_main_t *km = &ikev2_main;
4747 vlib_thread_main_t *tm = vlib_get_thread_main ();
4750 clib_memset (km, 0, sizeof (ikev2_main_t));
4751 km->vnet_main = vnet_get_main ();
4754 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4755 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4756 ikev2_crypto_init (km);
4758 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4760 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4761 CLIB_CACHE_LINE_BYTES);
4762 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4764 ikev2_main_per_thread_data_t *ptd =
4765 vec_elt_at_index (km->per_thread_data, thread_id);
4767 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4769 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4770 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4771 ptd->hmac_ctx = HMAC_CTX_new ();
4773 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4774 ptd->evp_ctx = &ptd->_evp_ctx;
4775 HMAC_CTX_init (&(ptd->_hmac_ctx));
4776 ptd->hmac_ctx = &ptd->_hmac_ctx;
4780 km->sa_by_ispi = hash_create (0, sizeof (uword));
4781 km->sw_if_indices = hash_create (0, 0);
4783 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4784 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4785 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4786 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4788 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt");
4789 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4791 ikev2_cli_reference ();
4793 km->dns_resolve_name =
4794 vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name");
4795 if (!km->dns_resolve_name)
4796 ikev2_log_error ("cannot load symbols from dns plugin");
4798 km->log_level = IKEV2_LOG_ERROR;
4799 km->log_class = vlib_log_register_class ("ikev2", 0);
4804 VLIB_INIT_FUNCTION (ikev2_init) = {
4805 .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init", "dns_init"),
4810 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4813 ikev2_main_t *km = &ikev2_main;
4814 ikev2_profile_t *p = 0;
4815 vlib_main_t *vm = km->vlib_main;
4816 f64 now = vlib_time_now (vm);
4819 if (sa->profile_index != ~0)
4820 p = pool_elt_at_index (km->profiles, sa->profile_index);
4822 if (sa->is_initiator && p && csa->time_to_expiration
4823 && now > csa->time_to_expiration)
4825 if (!csa->is_expired || csa->rekey_retries > 0)
4827 ikev2_rekey_child_sa_internal (vm, sa, csa);
4828 csa->time_to_expiration = now + p->handover;
4829 csa->is_expired = 1;
4830 if (csa->rekey_retries == 0)
4832 csa->rekey_retries = 5;
4834 else if (csa->rekey_retries > 0)
4836 csa->rekey_retries--;
4837 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4838 csa->i_proposals->spi, csa->rekey_retries);
4839 if (csa->rekey_retries == 0)
4841 csa->rekey_retries = -1;
4848 csa->time_to_expiration = 0;
4849 ikev2_delete_child_sa_internal (vm, sa, csa);
4857 ipip_tunnel_t *ipip = NULL;
4858 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4859 if (~0 == sw_if_index)
4861 ip46_address_t local_ip;
4862 ip46_address_t remote_ip;
4863 if (sa->is_initiator)
4865 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4866 ip_addr_bytes (&sa->iaddr));
4867 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4868 ip_addr_bytes (&sa->raddr));
4872 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4873 ip_addr_bytes (&sa->raddr));
4874 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4875 ip_addr_bytes (&sa->iaddr));
4879 ipip_tunnel_key_t key = {
4882 .transport = IPIP_TRANSPORT_IP4,
4887 ipip = ipip_tunnel_db_find (&key);
4890 sw_if_index = ipip->sw_if_index;
4896 vec_add1 (sas_in, csa->remote_sa_id);
4897 vlib_worker_thread_barrier_sync (vm);
4898 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4899 csa->local_sa_id, sas_in);
4902 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4903 vlib_worker_thread_barrier_release (vm);
4910 ikev2_set_log_level (ikev2_log_level_t log_level)
4912 ikev2_main_t *km = &ikev2_main;
4914 if (log_level >= IKEV2_LOG_MAX)
4916 ikev2_log_error ("unknown logging level %d", log_level);
4920 km->log_level = log_level;
4925 ikev2_set_liveness_params (u32 period, u32 max_retries)
4927 ikev2_main_t *km = &ikev2_main;
4929 if (period == 0 || max_retries == 0)
4930 return clib_error_return (0, "invalid args");
4932 km->liveness_period = period;
4933 km->liveness_max_retries = max_retries;
4938 ikev2_profile_natt_disable (u8 * name)
4940 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4942 return clib_error_return (0, "unknown profile %v", name);
4944 p->natt_disabled = 1;
4949 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4951 ikev2_main_t *km = &ikev2_main;
4952 vlib_main_t *vm = km->vlib_main;
4953 ikev2_main_per_thread_data_t *tkm;
4954 ikev2_sa_t *fsa = 0;
4955 ikev2_profile_t *p = 0;
4956 ikev2_child_sa_t *fchild = 0;
4957 f64 now = vlib_time_now (vm);
4958 vlib_counter_t counts;
4960 /* Search for the SA and child SA */
4961 vec_foreach (tkm, km->per_thread_data)
4967 pool_foreach (sa, tkm->sas) {
4968 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4977 vlib_get_combined_counter (&ipsec_sa_counters,
4978 ipsec_sa->stat_index, &counts);
4980 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4981 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4983 if (fchild && p && p->lifetime_maxdata)
4985 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4987 fchild->time_to_expiration = now;
4993 ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km,
4999 p = pool_elt_at_index (km->profiles, sa->profile_index);
5001 if (!p->responder.is_resolved)
5003 clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder);
5006 clib_error_free (r);
5010 if (!p->responder.is_resolved)
5013 ip_address_copy (&sa->raddr, &p->responder.addr);
5015 /* update nat detection destination hash */
5016 np = ikev2_find_ike_notify_payload (
5017 (ike_header_t *) sa->last_sa_init_req_packet_data,
5018 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP);
5021 nat_sha = ikev2_compute_nat_sha1 (
5022 clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi),
5023 &sa->raddr, clib_host_to_net_u16 (sa->dst_port));
5024 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5029 if (ip_address_is_zero (&sa->iaddr))
5031 if (!ikev2_get_if_address (p->responder.sw_if_index,
5032 ip_addr_version (&p->responder.addr),
5036 /* update NAT detection payload */
5038 ikev2_find_ike_notify_payload
5039 ((ike_header_t *) sa->last_sa_init_req_packet_data,
5040 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
5044 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
5045 clib_host_to_net_u64 (sa->rspi),
5047 clib_host_to_net_u16 (IKEV2_PORT));
5048 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5053 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5056 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5057 clib_memcpy_fast (vlib_buffer_get_current (b),
5058 sa->last_sa_init_req_packet_data,
5059 vec_len (sa->last_sa_init_req_packet_data));
5061 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5062 vec_len (sa->last_sa_init_req_packet_data),
5063 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5067 ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km)
5074 hash_foreach (ispi, sai, km->sa_by_ispi,
5076 sa = pool_elt_at_index (km->sais, sai);
5077 if (sa->init_response_received)
5080 ikev2_process_pending_sa_init_one (vm, km, sa);
5086 ikev2_send_informational_request (ikev2_sa_t * sa)
5088 ikev2_main_t *km = &ikev2_main;
5089 ip_address_t *src, *dst;
5096 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5099 ikev2_log_error ("buffer alloc failure");
5103 ike0 = vlib_buffer_get_current (b0);
5104 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5105 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5106 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5107 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5109 sa->last_init_msg_id += 1;
5110 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5114 if (ikev2_natt_active (sa))
5115 len = ikev2_insert_non_esp_marker (ike0, len);
5117 if (sa->is_initiator)
5128 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5129 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5134 ikev2_disable_dpd (void)
5136 ikev2_main_t *km = &ikev2_main;
5137 km->dpd_disabled = 1;
5140 static_always_inline int
5141 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
5143 ikev2_main_t *km = &ikev2_main;
5144 vlib_main_t *vm = km->vlib_main;
5146 if (!sa->keys_generated)
5149 if (sa->liveness_retries >= km->liveness_max_retries)
5152 f64 now = vlib_time_now (vm);
5154 if (sa->liveness_period_check < now)
5156 sa->liveness_retries++;
5157 sa->liveness_period_check = now + km->liveness_period;
5158 ikev2_send_informational_request (sa);
5164 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5167 ikev2_main_t *km = &ikev2_main;
5169 ikev2_child_sa_t *c;
5174 vlib_process_wait_for_event_or_clock (vm, 2);
5175 vlib_process_get_events (vm, NULL);
5177 /* process ike child sas */
5178 ikev2_main_per_thread_data_t *tkm;
5179 vec_foreach (tkm, km->per_thread_data)
5182 u32 *to_be_deleted = 0;
5185 pool_foreach (sa, tkm->sas) {
5186 ikev2_child_sa_t *c;
5189 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5192 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5194 sa->old_remote_id_present = 0;
5198 sa->old_id_expiration -= 1;
5200 vec_foreach (c, sa->childs)
5201 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5203 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5204 vec_add1 (to_be_deleted, sa - tkm->sas);
5208 vec_foreach (sai, to_be_deleted)
5210 sa = pool_elt_at_index (tkm->sas, sai[0]);
5211 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5212 vec_foreach (c, sa->childs)
5214 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5215 ikev2_sa_del_child_sa (sa, c);
5217 ikev2_sa_free_all_vec (sa);
5218 hash_unset (tkm->sa_by_rspi, sa->rspi);
5219 pool_put (tkm->sas, sa);
5223 p = pool_elt_at_index (km->profiles, sa->profile_index);
5226 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5229 ikev2_log_error ("%U", format_clib_error, e);
5230 clib_error_free (e);
5235 vec_free (to_be_deleted);
5238 /* process ipsec sas */
5241 pool_foreach (sa, ipsec_sa_pool)
5243 ikev2_mngr_process_ipsec_sa (sa);
5247 ikev2_process_pending_sa_init (vm, km);
5253 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5254 .function = ikev2_mngr_process_fn,
5255 .type = VLIB_NODE_TYPE_PROCESS,
5257 "ikev2-manager-process",
5260 VLIB_PLUGIN_REGISTER () = {
5261 .version = VPP_BUILD_VER,
5262 .description = "Internet Key Exchange (IKEv2) Protocol",
5267 * fd.io coding-style-patch-verification: ON
5270 * eval: (c-set-style "gnu")