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;
114 ikev2_get_port (ikev2_sa_t *sa)
116 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
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, vec_len (sa->i_nonce));
409 RAND_bytes ((u8 *) sa->r_nonce, vec_len (sa->i_nonce));
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);
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)
666 ikev2_elog_error ("KE: packet too small");
670 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
671 vec_reset_length (ke_data[0]);
672 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
677 ikev2_parse_nonce_payload (const void *p, u32 rlen, const u8 **nonce)
679 const ike_payload_header_t *ikep = p;
680 u16 plen = clib_net_to_host_u16 (ikep->length);
681 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
682 int len = plen - sizeof (*ikep);
683 ASSERT (len >= 16 && len <= 256);
684 if (PREDICT_FALSE (len < 16 || len > 256))
686 ikev2_elog_error ("NONCE: bad size");
689 *nonce = ikep->payload;
694 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
697 if (sizeof (*ikep) > rlen)
699 ikev2_elog_error ("payload: packet too small");
702 *plen = clib_net_to_host_u16 (ikep->length);
703 if (*plen < sizeof (*ikep) || *plen > rlen)
705 ikev2_elog_error ("payload: bad size");
712 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
713 udp_header_t *udp, u32 len, u32 sw_if_index)
716 u8 payload = ike->nextpayload;
717 ike_payload_header_t *ikep;
720 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
721 "from ", clib_net_to_host_u64 (ike->ispi),
722 clib_net_to_host_u64 (ike->rspi),
723 ip_addr_v4 (&sa->iaddr).as_u32,
724 ip_addr_version (&sa->iaddr) == AF_IP4);
726 sa->ispi = clib_net_to_host_u64 (ike->ispi);
727 sa->sw_if_index = sw_if_index;
729 /* store whole IKE payload - needed for PSK auth */
730 vec_reset_length (sa->last_sa_init_req_packet_data);
731 vec_add (sa->last_sa_init_req_packet_data, ike, len);
733 if (len < sizeof (*ike))
735 ikev2_elog_error ("IKE_INIT request too small");
739 len -= sizeof (*ike);
740 while (p < len && payload != IKEV2_PAYLOAD_NONE)
742 ikep = (ike_payload_header_t *) & ike->payload[p];
743 int current_length = len - p;
744 if (!ikev2_check_payload_length (ikep, current_length, &plen))
747 if (payload == IKEV2_PAYLOAD_SA)
749 ikev2_sa_free_proposal_vector (&sa->i_proposals);
750 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
752 else if (payload == IKEV2_PAYLOAD_KE)
754 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
758 else if (payload == IKEV2_PAYLOAD_NONCE)
762 vec_reset_length (sa->i_nonce);
763 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
766 vec_add (sa->i_nonce, nonce, nonce_len);
768 else if (payload == IKEV2_PAYLOAD_NOTIFY)
771 ikev2_parse_notify_payload (ikep, current_length);
772 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
774 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
776 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
778 if (sa->natt_state == IKEV2_NATT_ENABLED)
779 sa->natt_state = IKEV2_NATT_ACTIVE;
780 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
781 " behind NAT", sa->ispi);
785 else if (n->msg_type ==
786 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
788 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
790 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
792 if (sa->natt_state == IKEV2_NATT_ENABLED)
793 sa->natt_state = IKEV2_NATT_ACTIVE;
794 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
795 " (self) behind NAT", sa->ispi);
801 else if (payload == IKEV2_PAYLOAD_VENDOR)
803 ikev2_parse_vendor_payload (ikep);
807 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
809 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
811 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
812 sa->unsupported_cp = payload;
817 payload = ikep->nextpayload;
821 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
826 ikev2_process_sa_init_resp (vlib_main_t * vm,
827 ikev2_sa_t * sa, ike_header_t * ike,
828 udp_header_t * udp, u32 len)
831 u8 payload = ike->nextpayload;
832 ike_payload_header_t *ikep;
835 sa->ispi = clib_net_to_host_u64 (ike->ispi);
836 sa->rspi = clib_net_to_host_u64 (ike->rspi);
838 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
839 "from ", sa->ispi, sa->rspi,
840 ip_addr_v4 (&sa->raddr).as_u32,
841 ip_addr_version (&sa->raddr) == AF_IP4);
843 /* store whole IKE payload - needed for PSK auth */
844 vec_reset_length (sa->last_sa_init_res_packet_data);
845 vec_add (sa->last_sa_init_res_packet_data, ike, len);
847 if (sizeof (*ike) > len)
849 ikev2_elog_error ("IKE_INIT response too small");
853 len -= sizeof (*ike);
854 while (p < len && payload != IKEV2_PAYLOAD_NONE)
856 int current_length = len - p;
857 ikep = (ike_payload_header_t *) & ike->payload[p];
858 if (!ikev2_check_payload_length (ikep, current_length, &plen))
861 if (payload == IKEV2_PAYLOAD_SA)
863 ikev2_sa_free_proposal_vector (&sa->r_proposals);
864 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
867 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
869 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
872 else if (payload == IKEV2_PAYLOAD_KE)
874 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
878 else if (payload == IKEV2_PAYLOAD_NONCE)
882 vec_reset_length (sa->r_nonce);
883 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
886 vec_add (sa->r_nonce, nonce, nonce_len);
888 else if (payload == IKEV2_PAYLOAD_NOTIFY)
891 ikev2_parse_notify_payload (ikep, current_length);
892 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
894 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
897 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
899 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
900 " behind NAT, unsupported", sa->ispi);
904 else if (n->msg_type ==
905 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
907 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
910 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
912 if (sa->natt_state == IKEV2_NATT_ENABLED)
913 sa->natt_state = IKEV2_NATT_ACTIVE;
914 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
915 " (self) behind NAT", sa->ispi);
921 else if (payload == IKEV2_PAYLOAD_VENDOR)
923 ikev2_parse_vendor_payload (ikep);
927 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
929 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
931 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
932 sa->unsupported_cp = payload;
937 payload = ikep->nextpayload;
943 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
944 u8 * payload, u32 rlen, u32 * out_len)
946 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
948 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
949 ike_payload_header_t *ikep = 0;
952 ikev2_sa_transform_t *tr_integ;
953 ikev2_sa_transform_t *tr_encr;
955 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
957 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
958 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
960 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
963 if (rlen <= sizeof (*ike))
966 int len = rlen - sizeof (*ike);
968 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
970 ikep = (ike_payload_header_t *) & ike->payload[p];
971 int current_length = len - p;
972 if (!ikev2_check_payload_length (ikep, current_length, &plen))
975 if (*payload == IKEV2_PAYLOAD_SK)
977 last_payload = *payload;
981 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
983 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
985 sa->unsupported_cp = *payload;
990 *payload = ikep->nextpayload;
994 if (last_payload != IKEV2_PAYLOAD_SK)
996 ikev2_elog_error ("Last payload must be SK");
1002 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
1005 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
1006 u8 *aad = (u8 *) ike;
1007 u32 aad_len = ikep->payload - aad;
1008 u8 *tag = ikep->payload + plen;
1010 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
1011 plen, aad, aad_len, tag, &dlen);
1015 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
1020 if (rlen < tr_integ->key_trunc)
1024 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1025 (u8 *) ike, rlen - tr_integ->key_trunc);
1027 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1030 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1032 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1034 ikev2_elog_error ("message integrity check failed");
1040 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1045 plaintext = ikep->payload + tr_encr->block_size;
1053 ikev2_is_id_equal (const ikev2_id_t *i1, const ikev2_id_t *i2)
1055 if (i1->type != i2->type)
1058 if (vec_len (i1->data) != vec_len (i2->data))
1061 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1068 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1071 ikev2_main_t *km = &ikev2_main;
1074 ikev2_child_sa_t *c;
1076 /* find old IKE SAs with the same authenticated identity */
1078 pool_foreach (tmp, ptd->sas) {
1079 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1080 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1083 if (sa->rspi != tmp->rspi)
1084 vec_add1(delete, tmp - ptd->sas);
1088 for (i = 0; i < vec_len (delete); i++)
1090 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1091 vec_foreach (c, tmp->childs)
1093 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1095 ikev2_delete_sa (ptd, tmp);
1099 sa->initial_contact = 0;
1103 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1106 ikev2_main_t *km = &ikev2_main;
1108 if (!sa->initial_contact)
1113 ikev2_initial_contact_cleanup_internal (ptd, sa);
1117 vec_foreach (ptd, km->per_thread_data)
1118 ikev2_initial_contact_cleanup_internal (ptd, sa);
1120 sa->initial_contact = 0;
1124 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1126 const ike_id_payload_header_t *id = p;
1127 u16 plen = clib_net_to_host_u16 (id->length);
1128 if (plen < sizeof (*id) || plen > rlen)
1131 sa_id->type = id->id_type;
1132 vec_reset_length (sa_id->data);
1133 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1139 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1141 const ike_auth_payload_header_t *ah = p;
1142 u16 plen = clib_net_to_host_u16 (ah->length);
1144 a->method = ah->auth_method;
1145 vec_reset_length (a->data);
1146 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1151 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1152 ike_header_t * ike, u32 len)
1155 ikev2_child_sa_t *first_child_sa;
1156 u8 payload = ike->nextpayload;
1158 ike_payload_header_t *ikep;
1162 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1163 "from ", clib_host_to_net_u64 (ike->ispi),
1164 clib_host_to_net_u64 (ike->rspi),
1166 ip_addr_v4 (&sa->raddr).as_u32 :
1167 ip_addr_v4 (&sa->iaddr).as_u32,
1168 ip_addr_version (&sa->raddr) == AF_IP4);
1170 ikev2_calc_keys (sa);
1172 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1176 if (sa->unsupported_cp)
1178 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1184 /* select or create 1st child SA */
1185 if (sa->is_initiator)
1187 first_child_sa = &sa->childs[0];
1191 ikev2_sa_free_all_child_sa (&sa->childs);
1192 vec_add2 (sa->childs, first_child_sa, 1);
1196 /* process encrypted payload */
1197 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1199 ikep = (ike_payload_header_t *) & plaintext[p];
1200 int current_length = dlen - p;
1201 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1204 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1206 if (sa->is_initiator)
1208 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1209 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1214 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1215 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1219 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1221 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1224 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1226 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1229 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1231 if (sa->is_initiator)
1233 if (!ikev2_parse_auth_payload (ikep, current_length,
1239 if (!ikev2_parse_auth_payload (ikep, current_length,
1244 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1247 ikev2_parse_notify_payload (ikep, current_length);
1248 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1250 sa->initial_contact = 1;
1254 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1256 ikev2_parse_vendor_payload (ikep);
1258 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1260 vec_free (first_child_sa->tsi);
1261 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1263 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1265 vec_free (first_child_sa->tsr);
1266 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1270 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1273 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1275 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1276 sa->unsupported_cp = payload;
1281 payload = ikep->nextpayload;
1288 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1293 ikev2_process_informational_req (vlib_main_t * vm,
1294 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1297 u8 payload = ike->nextpayload;
1299 ike_payload_header_t *ikep;
1301 ikev2_notify_t *n = 0;
1303 sa->liveness_retries = 0;
1304 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1305 "from ", clib_host_to_net_u64 (ike->ispi),
1306 clib_host_to_net_u64 (ike->rspi),
1307 ip_addr_v4 (&sa->iaddr).as_u32,
1308 ip_addr_version (&sa->iaddr) == AF_IP4);
1310 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1315 /* process encrypted payload */
1317 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1319 u32 current_length = dlen - p;
1320 if (p + sizeof (*ikep) > dlen)
1323 ikep = (ike_payload_header_t *) & plaintext[p];
1324 u16 plen = clib_net_to_host_u16 (ikep->length);
1326 if (plen < sizeof (*ikep) || plen > current_length)
1329 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1331 n = ikev2_parse_notify_payload (ikep, current_length);
1334 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1335 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1338 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1340 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1342 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1344 ikev2_parse_vendor_payload (ikep);
1348 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1350 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1352 sa->unsupported_cp = payload;
1356 payload = ikep->nextpayload;
1363 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1364 ikev2_sa_t * sa, ike_header_t * ike,
1368 u8 payload = ike->nextpayload;
1371 ikev2_rekey_t *rekey;
1372 ike_payload_header_t *ikep;
1373 ikev2_notify_t *n = 0;
1374 ikev2_ts_t *tsi = 0;
1375 ikev2_ts_t *tsr = 0;
1376 ikev2_sa_proposal_t *proposal = 0;
1377 ikev2_child_sa_t *child_sa;
1380 const u8 *nonce = 0;
1383 if (sa->is_initiator)
1384 src = ip_addr_v4 (&sa->raddr).as_u32;
1386 src = ip_addr_v4 (&sa->iaddr).as_u32;
1388 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1389 clib_host_to_net_u64 (ike->ispi),
1390 clib_host_to_net_u64 (ike->rspi), src,
1391 ip_addr_version (&sa->raddr) == AF_IP4);
1393 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1396 goto cleanup_and_exit;
1398 /* process encrypted payload */
1400 while (payload != IKEV2_PAYLOAD_NONE)
1402 ikep = (ike_payload_header_t *) & plaintext[p];
1403 int current_length = dlen - p;
1404 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1405 goto cleanup_and_exit;
1407 if (payload == IKEV2_PAYLOAD_SA)
1409 proposal = ikev2_parse_sa_payload (ikep, current_length);
1411 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1413 n = ikev2_parse_notify_payload (ikep, current_length);
1414 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1419 else if (payload == IKEV2_PAYLOAD_DELETE)
1421 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1423 else if (payload == IKEV2_PAYLOAD_VENDOR)
1425 ikev2_parse_vendor_payload (ikep);
1427 else if (payload == IKEV2_PAYLOAD_NONCE)
1429 nonce_len = ikev2_parse_nonce_payload (ikep, current_length, &nonce);
1431 goto cleanup_and_exit;
1433 else if (payload == IKEV2_PAYLOAD_TSI)
1435 tsi = ikev2_parse_ts_payload (ikep, current_length);
1437 else if (payload == IKEV2_PAYLOAD_TSR)
1439 tsr = ikev2_parse_ts_payload (ikep, current_length);
1443 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1445 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1447 sa->unsupported_cp = payload;
1448 goto cleanup_and_exit;
1451 payload = ikep->nextpayload;
1455 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP || !nonce)
1456 goto cleanup_and_exit;
1458 if (sa->is_initiator)
1461 if (vec_len (rekey) == 0)
1462 goto cleanup_and_exit;
1463 rekey->protocol_id = proposal->protocol_id;
1465 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1466 rekey->i_proposal->spi = rekey->spi;
1467 rekey->r_proposal = proposal;
1471 vec_reset_length (sa->r_nonce);
1472 vec_add (sa->r_nonce, nonce, nonce_len);
1473 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1476 child_sa->rekey_retries = 0;
1483 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1486 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1488 goto cleanup_and_exit;
1490 vec_add2 (sa->rekey, rekey, 1);
1491 rekey->protocol_id = n->protocol_id;
1492 rekey->spi = n->spi;
1493 rekey->i_proposal = proposal;
1495 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1497 vec_reset_length (sa->i_nonce);
1498 vec_add (sa->i_nonce, nonce, nonce_len);
1499 /* generate new Nr */
1500 vec_validate (sa->r_nonce, nonce_len - 1);
1501 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1505 /* create new child SA */
1506 vec_add2 (sa->new_child, rekey, 1);
1507 rekey->i_proposal = proposal;
1509 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1511 vec_reset_length (sa->i_nonce);
1512 vec_add (sa->i_nonce, nonce, nonce_len);
1513 /* generate new Nr */
1514 vec_validate (sa->r_nonce, nonce_len - 1);
1515 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1525 vec_free (proposal);
1532 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1540 ikev2_sa_transform_t *tr_prf;
1543 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1549 nonce = sa->i_nonce;
1550 packet_data = sa->last_sa_init_res_packet_data;
1556 nonce = sa->r_nonce;
1557 packet_data = sa->last_sa_init_req_packet_data;
1560 data = vec_new (u8, 4);
1562 vec_append (data, id->data);
1564 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1565 vec_append (authmsg, packet_data);
1566 vec_append (authmsg, nonce);
1567 vec_append (authmsg, id_hash);
1575 ikev2_match_profile (const ikev2_profile_t *p, const ikev2_id_t *id_loc,
1576 const ikev2_id_t *id_rem, int is_initiator)
1578 /* on the initiator, IDi is always present and must match
1579 * however on the responder, IDr (which is our local id) is optional */
1580 if ((is_initiator || id_loc->type != 0) &&
1581 !ikev2_is_id_equal (&p->loc_id, id_loc))
1584 /* on the initiator, we might not have configured a specific remote id
1585 * however on the responder, the remote id should always be configured */
1586 if ((!is_initiator || p->rem_id.type != 0) &&
1587 !ikev2_is_id_equal (&p->rem_id, id_rem))
1594 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1596 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1597 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1598 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1599 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1606 ikev2_sa_match_ts (ikev2_sa_t * sa)
1608 ikev2_main_t *km = &ikev2_main;
1610 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1611 ikev2_id_t *id_rem, *id_loc;
1614 pool_foreach (p, km->profiles) {
1616 if (sa->is_initiator)
1631 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1634 sa->profile_index = p - km->profiles;
1636 vec_foreach(ts, sa->childs[0].tsi)
1638 if (ikev2_ts_cmp(p_tsi, ts))
1640 vec_add1 (tsi, ts[0]);
1645 vec_foreach(ts, sa->childs[0].tsr)
1647 if (ikev2_ts_cmp(p_tsr, ts))
1649 vec_add1 (tsr, ts[0]);
1660 vec_free (sa->childs[0].tsi);
1661 vec_free (sa->childs[0].tsr);
1662 sa->childs[0].tsi = tsi;
1663 sa->childs[0].tsr = tsr;
1669 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1673 static ikev2_profile_t *
1674 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1675 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1677 ikev2_profile_t *ret = 0, *p;
1678 ikev2_id_t *id_rem, *id_loc;
1679 ikev2_auth_t *sa_auth;
1680 u8 *authmsg, *psk = 0, *auth = 0;
1682 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1684 if (sa->is_initiator)
1688 sa_auth = &sa->r_auth;
1694 sa_auth = &sa->i_auth;
1697 pool_foreach (p, km->profiles)
1699 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1702 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1704 if (!p->auth.data ||
1705 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1708 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1709 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1711 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1713 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1720 ikev2_elog_uint (IKEV2_LOG_ERROR,
1721 "shared key mismatch! ispi %lx", sa->ispi);
1724 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1726 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1729 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1731 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1737 ikev2_elog_uint (IKEV2_LOG_ERROR,
1738 "cert verification failed! ispi %lx", sa->ispi);
1747 ikev2_sa_auth (ikev2_sa_t *sa)
1749 ikev2_main_t *km = &ikev2_main;
1750 ikev2_profile_t *sel_p = 0;
1751 ikev2_sa_transform_t *tr_prf;
1752 u8 *psk, *authmsg, *key_pad;
1755 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1757 /* only shared key and rsa signature */
1758 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1759 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1761 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1763 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1767 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1768 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1772 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1773 sa->udp_encap = sel_p->udp_encap;
1774 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1776 if (!sa->is_initiator)
1778 vec_free (sa->r_id.data);
1779 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1780 sa->r_id.type = sel_p->loc_id.type;
1781 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1782 sa->i_id.type = sel_p->rem_id.type;
1784 /* generate our auth data */
1785 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1786 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1788 vec_free (sa->r_auth.data);
1789 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1790 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1791 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1794 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1796 vec_free (sa->r_auth.data);
1797 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1798 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1802 /* select transforms for 1st child sa */
1803 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1804 sa->childs[0].r_proposals =
1805 ikev2_select_proposal (sa->childs[0].i_proposals,
1806 IKEV2_PROTOCOL_ESP);
1808 if (~0 != sel_p->tun_itf)
1810 sa->is_tun_itf_set = 1;
1811 sa->tun_itf = sel_p->tun_itf;
1817 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1818 "profile found! ispi %lx", sa->ispi);
1819 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1825 ikev2_sa_auth_init (ikev2_sa_t * sa)
1827 ikev2_main_t *km = &ikev2_main;
1828 u8 *authmsg, *key_pad, *psk = 0;
1829 ikev2_sa_transform_t *tr_prf;
1832 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1834 /* only shared key and rsa signature */
1835 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1836 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1838 ikev2_elog_uint (IKEV2_LOG_ERROR,
1839 "unsupported authentication method %u",
1841 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1845 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1847 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1849 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1850 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1851 vec_free (sa->i_auth.data);
1852 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1853 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1857 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1859 vec_free (sa->i_auth.data);
1860 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1861 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1867 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1869 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1873 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1875 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1885 ipsec_sa_flags_t flags;
1888 ipsec_crypto_alg_t encr_type;
1889 ipsec_integ_alg_t integ_type;
1890 ip_address_t local_ip;
1891 ip_address_t remote_ip;
1892 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1894 u32 old_remote_sa_id;
1895 u16 ipsec_over_udp_port;
1898 } ikev2_add_ipsec_tunnel_args_t;
1901 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1903 ikev2_main_t *km = &ikev2_main;
1907 .t_flags = TUNNEL_FLAG_NONE,
1908 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1910 .t_mode = TUNNEL_MODE_P2P,
1913 .t_src = a->local_ip,
1914 .t_dst = a->remote_ip,
1916 tunnel_t tun_out = {
1917 .t_flags = TUNNEL_FLAG_NONE,
1918 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1920 .t_mode = TUNNEL_MODE_P2P,
1923 .t_src = a->remote_ip,
1924 .t_dst = a->local_ip,
1927 if (~0 == a->sw_if_index)
1929 /* no tunnel associated with the SA/profile - create a new one */
1930 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1931 &ip_addr_46 (&a->remote_ip), 0,
1932 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1933 TUNNEL_MODE_P2P, &sw_if_index);
1935 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1937 if (hash_get (km->sw_if_indices, sw_if_index))
1938 /* interface is managed by IKE; proceed with updating SAs */
1941 hash_set1 (km->sw_if_indices, sw_if_index);
1945 sw_if_index = a->sw_if_index;
1946 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1951 ikev2_elog_uint (IKEV2_LOG_ERROR,
1952 "installing ipip tunnel failed! local spi: %x",
1958 vec_add1 (sas_in, a->remote_sa_id);
1961 ipsec_tun_protect_del (sw_if_index, NULL);
1963 /* replace local SA immediately */
1964 ipsec_sa_unlock_id (a->local_sa_id);
1966 /* keep the old sa */
1967 vec_add1 (sas_in, a->old_remote_sa_id);
1970 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1971 a->encr_type, &a->loc_ckey, a->integ_type,
1972 &a->loc_ikey, a->flags, a->salt_local,
1973 a->src_port, a->dst_port, &tun_out, NULL);
1977 rv = ipsec_sa_add_and_lock (
1978 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1979 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1980 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1981 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
1985 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1992 ipsec_sa_unlock_id (a->remote_sa_id);
1994 ipsec_sa_unlock_id (a->local_sa_id);
2000 ikev2_create_tunnel_interface (vlib_main_t * vm,
2002 ikev2_child_sa_t * child, u32 sa_index,
2003 u32 child_index, u8 is_rekey)
2005 u32 thread_index = vlib_get_thread_index ();
2006 ikev2_main_t *km = &ikev2_main;
2007 ipsec_crypto_alg_t encr_type;
2008 ipsec_integ_alg_t integ_type;
2009 ikev2_profile_t *p = 0;
2010 ikev2_sa_transform_t *tr;
2011 ikev2_sa_proposal_t *proposals;
2013 ikev2_add_ipsec_tunnel_args_t a;
2015 clib_memset (&a, 0, sizeof (a));
2017 if (!child->r_proposals)
2019 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2023 if (sa->is_initiator)
2025 ip_address_copy (&a.local_ip, &sa->iaddr);
2026 ip_address_copy (&a.remote_ip, &sa->raddr);
2027 proposals = child->r_proposals;
2028 a.local_spi = child->r_proposals[0].spi;
2029 a.remote_spi = child->i_proposals[0].spi;
2033 ip_address_copy (&a.local_ip, &sa->raddr);
2034 ip_address_copy (&a.remote_ip, &sa->iaddr);
2035 proposals = child->i_proposals;
2036 a.local_spi = child->i_proposals[0].spi;
2037 a.remote_spi = child->r_proposals[0].spi;
2040 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
2043 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
2044 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2046 if (ikev2_natt_active (sa))
2047 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2048 a.is_rekey = is_rekey;
2050 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2051 if (tr && tr->esn_type)
2052 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2054 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2057 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2059 switch (tr->key_len)
2062 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2065 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2068 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2071 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2076 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2079 switch (tr->key_len)
2082 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2085 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2088 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2091 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2099 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2105 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2108 a.encr_type = encr_type;
2112 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2115 switch (tr->integ_type)
2117 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2118 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2120 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2121 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2123 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2124 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2126 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2127 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2130 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2136 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2142 integ_type = IPSEC_INTEG_ALG_NONE;
2145 a.integ_type = integ_type;
2146 ikev2_calc_child_keys (sa, child);
2148 if (sa->is_initiator)
2150 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2151 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2152 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2153 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2156 a.salt_remote = child->salt_er;
2157 a.salt_local = child->salt_ei;
2159 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2163 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2164 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2165 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2166 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2169 a.salt_remote = child->salt_ei;
2170 a.salt_local = child->salt_er;
2173 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2174 a.src_port = sa->ipsec_over_udp_port;
2177 if (sa->is_initiator && sa->profile_index != ~0)
2178 p = pool_elt_at_index (km->profiles, sa->profile_index);
2180 if (p && p->lifetime)
2182 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2183 if (p->lifetime_jitter)
2185 // This is not much better than rand(3), which Coverity warns
2186 // is unsuitable for security applications; random_u32 is
2187 // however fast. If this perturbance to the expiration time
2188 // needs to use a better RNG then we may need to use something
2189 // like /dev/urandom which has significant overhead.
2190 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2191 rnd = random_u32 (&rnd);
2193 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2197 if (thread_index & 0xffffffc0)
2198 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2200 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2201 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2203 child->local_sa_id =
2205 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2207 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2212 /* create a new remote SA ID to keep the old SA for a bit longer
2213 * so the peer has some time to swap their SAs */
2215 /* use most significat bit of child index part in id */
2217 if (sa->current_remote_id_mask)
2219 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2220 sa->current_remote_id_mask = 0;
2224 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2225 sa->current_remote_id_mask = mask;
2226 remote_sa_id |= mask;
2228 sa->old_id_expiration = 3.0;
2229 sa->old_remote_id_present = 1;
2232 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2234 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2235 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2237 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2238 (u8 *) & a, sizeof (a));
2244 ip46_address_t local_ip;
2245 ip46_address_t remote_ip;
2249 } ikev2_del_ipsec_tunnel_args_t;
2252 ikev2_flip_alternate_sa_bit (u32 id)
2261 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2263 ikev2_main_t *km = &ikev2_main;
2264 ipip_tunnel_t *ipip = NULL;
2267 if (~0 == a->sw_if_index)
2270 ipip_tunnel_key_t key = {
2272 .dst = a->remote_ip,
2273 .transport = IPIP_TRANSPORT_IP4,
2278 ipip = ipip_tunnel_db_find (&key);
2282 sw_if_index = ipip->sw_if_index;
2283 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2290 sw_if_index = a->sw_if_index;
2291 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2294 if (~0 != sw_if_index)
2295 ipsec_tun_protect_del (sw_if_index, NULL);
2297 ipsec_sa_unlock_id (a->remote_sa_id);
2298 ipsec_sa_unlock_id (a->local_sa_id);
2299 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2302 ipip_del_tunnel (ipip->sw_if_index);
2306 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2307 ikev2_child_sa_t * child)
2309 ikev2_del_ipsec_tunnel_args_t a;
2311 clib_memset (&a, 0, sizeof (a));
2313 if (sa->is_initiator)
2315 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2316 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2320 ip_address_to_46 (&sa->raddr, &a.local_ip);
2321 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2324 a.remote_sa_id = child->remote_sa_id;
2325 a.local_sa_id = child->local_sa_id;
2326 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2328 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2334 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2335 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2337 ikev2_main_t *km = &ikev2_main;
2338 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2340 ike_payload_header_t *ph;
2344 ikev2_sa_transform_t *tr_encr, *tr_integ;
2346 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2348 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2350 ikev2_payload_chain_t *chain = 0;
2351 ikev2_payload_new_chain (chain);
2353 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2355 if (sa->r_proposals == 0)
2357 ikev2_payload_add_notify (chain,
2358 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2359 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2361 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2363 u8 *data = vec_new (u8, 2);
2364 ikev2_sa_transform_t *tr_dh;
2366 ikev2_sa_get_td_for_type (sa->r_proposals,
2367 IKEV2_TRANSFORM_TYPE_DH);
2368 ASSERT (tr_dh && tr_dh->dh_type);
2370 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2371 data[1] = (tr_dh->dh_type) & 0xff;
2373 ikev2_payload_add_notify (chain,
2374 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2377 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2379 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2381 u8 *data = vec_new (u8, 1);
2383 data[0] = sa->unsupported_cp;
2384 ikev2_payload_add_notify (chain,
2385 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2393 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2394 ikev2_payload_add_sa (chain, sa->r_proposals);
2395 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2396 ikev2_payload_add_nonce (chain, sa->r_nonce);
2398 u8 *nat_detection_sha1 =
2399 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2400 clib_host_to_net_u64 (sa->rspi),
2401 &sa->raddr, udp->dst_port);
2402 ikev2_payload_add_notify (chain,
2403 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2404 nat_detection_sha1);
2405 vec_free (nat_detection_sha1);
2406 nat_detection_sha1 =
2407 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2408 clib_host_to_net_u64 (sa->rspi),
2409 &sa->iaddr, udp->src_port);
2410 ikev2_payload_add_notify (chain,
2411 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2412 nat_detection_sha1);
2413 vec_free (nat_detection_sha1);
2416 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2418 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2420 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2421 ikev2_payload_add_auth (chain, &sa->r_auth);
2422 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2423 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2424 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2426 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2428 ikev2_payload_add_notify (chain,
2429 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2431 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2433 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2435 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2437 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2438 ikev2_payload_add_auth (chain, &sa->r_auth);
2440 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2442 ikev2_payload_add_notify (chain,
2443 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2444 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2445 ikev2_payload_add_auth (chain, &sa->r_auth);
2446 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2447 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2449 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2451 u8 *data = vec_new (u8, 1);
2453 data[0] = sa->unsupported_cp;
2454 ikev2_payload_add_notify (chain,
2455 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2459 else if (sa->state == IKEV2_STATE_SA_INIT)
2461 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2462 /* IDr is optional when sending INIT from the initiator */
2463 ASSERT (sa->r_id.type != 0 || sa->is_initiator);
2464 if (sa->r_id.type != 0)
2465 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2466 ikev2_payload_add_auth (chain, &sa->i_auth);
2467 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2468 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2469 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2470 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2475 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2479 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2481 /* if pending delete */
2484 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2486 if (ike_hdr_is_request (ike))
2487 ikev2_payload_add_delete (chain, sa->del);
2489 /* The response to a request that deletes the IKE SA is an empty
2490 INFORMATIONAL response. */
2491 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2493 /* The response to a request that deletes ESP or AH SAs will contain
2494 delete payloads for the paired SAs going in the other direction. */
2497 ikev2_payload_add_delete (chain, sa->del);
2502 /* received N(AUTHENTICATION_FAILED) */
2503 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2505 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2508 /* received unsupported critical payload */
2509 else if (sa->unsupported_cp)
2511 u8 *data = vec_new (u8, 1);
2513 data[0] = sa->unsupported_cp;
2514 ikev2_payload_add_notify (chain,
2515 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2518 sa->unsupported_cp = 0;
2521 /* else send empty response */
2523 if (ike_hdr_is_response (ike))
2525 ASSERT (stats != 0);
2526 stats->n_keepalives++;
2527 sa->stats.n_keepalives++;
2531 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2533 if (sa->is_initiator)
2536 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2537 ikev2_notify_t notify;
2538 u8 *data = vec_new (u8, 4);
2539 clib_memset (¬ify, 0, sizeof (notify));
2540 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2541 notify.spi = sa->childs[0].i_proposals->spi;
2542 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2544 ikev2_payload_add_sa (chain, proposals);
2545 ikev2_payload_add_nonce (chain, sa->i_nonce);
2546 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2547 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2548 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2553 else if (vec_len (sa->rekey) > 0)
2555 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2556 ikev2_payload_add_nonce (chain, sa->r_nonce);
2557 ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
2558 ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
2559 vec_del1 (sa->rekey, 0);
2561 else if (vec_len (sa->new_child) > 0)
2563 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2564 ikev2_payload_add_nonce (chain, sa->r_nonce);
2565 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2567 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2569 vec_del1 (sa->new_child, 0);
2571 else if (sa->unsupported_cp)
2573 u8 *data = vec_new (u8, 1);
2575 data[0] = sa->unsupported_cp;
2576 ikev2_payload_add_notify (
2577 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2579 sa->unsupported_cp = 0;
2583 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2589 ike->version = IKE_VERSION_2;
2590 ike->nextpayload = IKEV2_PAYLOAD_SK;
2591 tlen = sizeof (*ike);
2593 if (sa->is_initiator)
2594 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2596 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2598 tlen += vec_len (chain->data);
2599 ike->nextpayload = chain->first_payload_type;
2600 ike->length = clib_host_to_net_u32 (tlen);
2602 if (tlen + b->current_length + b->current_data > buffer_data_size)
2608 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2610 /* store whole IKE payload - needed for PSK auth */
2611 vec_reset_length (sa->last_sa_init_res_packet_data);
2612 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2616 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2617 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2620 plen = sizeof (*ph);
2621 ph = (ike_payload_header_t *) & ike->payload[0];
2622 ph->nextpayload = chain->first_payload_type;
2625 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2626 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2627 plen += vec_len (chain->data) + iv_len;
2629 /* add space for hmac/tag */
2631 plen += tr_integ->key_trunc;
2633 plen += IKEV2_GCM_ICV_SIZE;
2636 if (tlen + b->current_length + b->current_data > buffer_data_size)
2642 /* payload and total length */
2643 ph->length = clib_host_to_net_u16 (plen);
2644 ike->length = clib_host_to_net_u32 (tlen);
2648 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2649 ph->payload, (u8 *) ike,
2650 sizeof (*ike) + sizeof (*ph),
2651 ph->payload + plen - sizeof (*ph) -
2652 IKEV2_GCM_ICV_SIZE))
2660 if (!ikev2_encrypt_data
2661 (ptd, sa, tr_encr, chain->data, ph->payload))
2667 ikev2_calc_integr (tr_integ,
2668 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2669 (u8 *) ike, tlen - tr_integ->key_trunc);
2670 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2671 sizeof (*ike), integ, tr_integ->key_trunc);
2674 /* store whole IKE payload - needed for retransmit */
2675 vec_reset_length (sa->last_res_packet_data);
2676 vec_add (sa->last_res_packet_data, ike, tlen);
2680 ikev2_payload_destroy_chain (chain);
2686 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2687 ip_address_t iaddr, ip_address_t raddr,
2692 u8 payload = ike->nextpayload;
2694 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2695 ip_address_cmp (&sa->iaddr, &iaddr) ||
2696 ip_address_cmp (&sa->raddr, &raddr))
2701 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2703 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2704 u32 plen = clib_net_to_host_u16 (ikep->length);
2706 if (plen < sizeof (ike_payload_header_t))
2709 if (payload == IKEV2_PAYLOAD_NONCE &&
2710 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2712 /* req is retransmit */
2713 if (sa->state == IKEV2_STATE_SA_INIT)
2715 sa->stats.n_init_retransmit++;
2716 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2717 u32 slen = clib_net_to_host_u32 (tmp->length);
2718 ike->ispi = tmp->ispi;
2719 ike->rspi = tmp->rspi;
2720 ike->nextpayload = tmp->nextpayload;
2721 ike->version = tmp->version;
2722 ike->exchange = tmp->exchange;
2723 ike->flags = tmp->flags;
2724 ike->msgid = tmp->msgid;
2725 ike->length = tmp->length;
2726 clib_memcpy_fast (ike->payload, tmp->payload,
2727 slen - sizeof (*ike));
2728 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2729 "ispi %lx IKE_SA_INIT retransmit "
2730 "from %d.%d.%d.%d to %d.%d.%d.%d",
2732 ip_addr_v4 (&raddr).as_u32,
2733 ip_addr_v4 (&iaddr).as_u32);
2736 /* else ignore req */
2739 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2740 "ispi %lx IKE_SA_INIT ignore "
2741 "from %d.%d.%d.%d to %d.%d.%d.%d",
2743 ip_addr_v4 (&raddr).as_u32,
2744 ip_addr_v4 (&iaddr).as_u32);
2748 payload = ikep->nextpayload;
2756 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2757 ip_address_t raddr, u32 rlen)
2761 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2764 pool_foreach (sa, ptd->sas) {
2765 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2771 /* req is not retransmit */
2776 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2778 if (ike_hdr_is_response (ike))
2781 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2784 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2786 sa->last_msg_id = msg_id;
2790 /* retransmitted req */
2791 if (msg_id == sa->last_msg_id)
2793 sa->stats.n_retransmit++;
2794 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2795 u32 slen = clib_net_to_host_u32 (tmp->length);
2796 ike->ispi = tmp->ispi;
2797 ike->rspi = tmp->rspi;
2798 ike->nextpayload = tmp->nextpayload;
2799 ike->version = tmp->version;
2800 ike->exchange = tmp->exchange;
2801 ike->flags = tmp->flags;
2802 ike->msgid = tmp->msgid;
2803 ike->length = tmp->length;
2804 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2805 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2806 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2807 ip_addr_v4 (&sa->iaddr).as_u32);
2811 /* old req ignore */
2812 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2813 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2814 ip_addr_v4 (&sa->iaddr).as_u32);
2819 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2821 ikev2_main_t *km = &ikev2_main;
2822 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2823 sa->profile_index = ~0;
2827 ikev2_del_sa_init_from_main (u64 * ispi)
2829 ikev2_main_t *km = &ikev2_main;
2830 uword *p = hash_get (km->sa_by_ispi, *ispi);
2833 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2834 hash_unset (km->sa_by_ispi, sai->ispi);
2835 ikev2_sa_free_all_vec (sai);
2836 pool_put (km->sais, sai);
2841 ikev2_del_sa_init (u64 ispi)
2843 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2848 ikev2_rewrite_v6_addrs (ikev2_sa_t *sa, ip6_header_t *ih)
2850 if (sa->is_initiator)
2852 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2853 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2857 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2858 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2863 ikev2_rewrite_v4_addrs (ikev2_sa_t *sa, ip4_header_t *ih)
2865 if (sa->is_initiator)
2867 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2868 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2872 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2873 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2878 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2879 const ip_address_family_t af)
2881 ip_address_set (&sa->raddr, raddr, af);
2882 ip_address_set (&sa->iaddr, iaddr, af);
2886 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2887 ip6_header_t * ip6, u8 is_ip4)
2892 src = ip4->src_address.as_u32;
2893 dst = ip4->dst_address.as_u32;
2897 src = ip6->src_address.as_u32[3];
2898 dst = ip6->dst_address.as_u32[3];
2900 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2901 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2902 exchange, src, dst);
2906 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2908 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2910 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2913 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2914 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2915 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2916 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2920 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2922 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2924 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2926 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2928 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2933 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2934 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2936 u32 n_left = frame->n_vectors, *from;
2937 ikev2_main_t *km = &ikev2_main;
2938 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2939 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2940 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2941 ikev2_stats_t _stats, *stats = &_stats;
2944 /* no NAT traversal for ip6 */
2945 ASSERT (!natt || is_ip4);
2947 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2948 from = vlib_frame_vector_args (frame);
2949 vlib_get_buffers (vm, from, bufs, n_left);
2954 vlib_buffer_t *b0 = b[0];
2955 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2956 : IKEV2_NEXT_IP6_ERROR_DROP;
2957 ip4_header_t *ip40 = 0;
2958 ip6_header_t *ip60 = 0;
2961 ikev2_sa_t *sa0 = 0;
2962 ikev2_sa_t sa; /* temporary store for SA */
2969 u8 *ptr = vlib_buffer_get_current (b0);
2970 ip40 = (ip4_header_t *) ptr;
2971 ptr += sizeof (*ip40);
2972 udp0 = (udp_header_t *) ptr;
2973 ptr += sizeof (*udp0);
2974 ike0 = (ike_header_t *) ptr;
2975 ip_hdr_sz = sizeof (*ip40);
2979 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2980 ike0 = vlib_buffer_get_current (b0);
2981 vlib_buffer_advance (b0, -sizeof (*udp0));
2982 udp0 = vlib_buffer_get_current (b0);
2986 ip40 = (ip4_header_t *) ipx_hdr;
2987 ip_hdr_sz = sizeof (*ip40);
2991 ip60 = (ip6_header_t *) ipx_hdr;
2992 ip_hdr_sz = sizeof (*ip60);
2994 vlib_buffer_advance (b0, -ip_hdr_sz);
2997 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2999 /* check for non-esp marker */
3002 ASSERT (*((u32 *) ike0) == 0);
3004 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
3005 rlen -= sizeof (ikev2_non_esp_marker);
3008 if (clib_net_to_host_u32 (ike0->length) != rlen)
3010 vlib_node_increment_counter (vm, node->node_index,
3011 IKEV2_ERROR_BAD_LENGTH, 1);
3015 if (ike0->version != IKE_VERSION_2)
3017 vlib_node_increment_counter (vm, node->node_index,
3018 IKEV2_ERROR_NOT_IKEV2, 1);
3022 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
3025 clib_memset (sa0, 0, sizeof (*sa0));
3027 if (ike_hdr_is_initiator (ike0))
3029 sa0->stats.n_sa_init_req++;
3030 stats->n_sa_init_req++;
3031 if (ike0->rspi == 0)
3034 ikev2_set_ip_address (sa0, &ip40->src_address,
3035 &ip40->dst_address, AF_IP4);
3037 ikev2_set_ip_address (sa0, &ip60->src_address,
3038 &ip60->dst_address, AF_IP6);
3040 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3043 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
3047 vlib_node_increment_counter (vm, node->node_index,
3050 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3052 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3057 res = ikev2_process_sa_init_req (
3058 vm, sa0, ike0, udp0, rlen,
3059 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3061 vlib_node_increment_counter (vm, node->node_index,
3062 IKEV2_ERROR_MALFORMED_PACKET,
3065 if (sa0->state == IKEV2_STATE_SA_INIT)
3067 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3069 ikev2_select_proposal (sa0->i_proposals,
3070 IKEV2_PROTOCOL_IKE);
3071 ikev2_generate_sa_init_data_and_log (sa0);
3074 if (sa0->state == IKEV2_STATE_SA_INIT
3075 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3077 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3079 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3081 vlib_node_increment_counter (vm, node->node_index,
3082 IKEV2_ERROR_NO_BUFF_SPACE,
3086 if (sa0->state == IKEV2_STATE_SA_INIT)
3088 /* add SA to the pool */
3089 pool_get (ptd->sas, sa0);
3090 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3091 ikev2_init_sa (vm, sa0);
3092 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3096 ikev2_sa_free_all_vec (sa0);
3100 else //received sa_init without initiator flag
3103 ikev2_set_ip_address (sa0, &ip40->dst_address,
3104 &ip40->src_address, AF_IP4);
3106 ikev2_set_ip_address (sa0, &ip60->dst_address,
3107 &ip60->src_address, AF_IP6);
3109 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3111 if (sa0->state == IKEV2_STATE_SA_INIT)
3114 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3115 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3118 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3120 if (clib_atomic_bool_cmp_and_swap
3121 (&sai->init_response_received, 0, 1))
3123 ikev2_complete_sa_data (sa0, sai);
3124 ikev2_calc_keys (sa0);
3125 ikev2_sa_auth_init (sa0);
3126 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3128 clib_net_to_host_u32 (sai->last_init_msg_id);
3129 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3130 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3133 vlib_node_increment_counter (vm,
3135 IKEV2_ERROR_NO_BUFF_SPACE,
3140 /* we've already processed sa-init response */
3141 sa0->state = IKEV2_STATE_UNKNOWN;
3146 if (sa0->state == IKEV2_STATE_SA_INIT)
3148 /* add SA to the pool */
3149 pool_get (ptd->sas, sa0);
3150 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3151 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3155 ikev2_sa_free_all_vec (sa0);
3159 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3162 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3165 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3166 slen = ikev2_retransmit_resp (sa0, ike0);
3169 vlib_node_increment_counter (vm, node->node_index,
3172 IKEV2_ERROR_IKE_REQ_IGNORE
3174 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3179 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3180 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3182 ikev2_sa_auth (sa0);
3184 vlib_node_increment_counter (vm, node->node_index,
3185 IKEV2_ERROR_MALFORMED_PACKET, 1);
3186 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3188 ikev2_initial_contact_cleanup (ptd, sa0);
3189 ikev2_sa_match_ts (sa0);
3190 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3191 ikev2_create_tunnel_interface (vm, sa0,
3196 if (sa0->is_initiator)
3198 sa0->last_msg_id = ~0;
3199 ikev2_del_sa_init (sa0->ispi);
3203 sa0->stats.n_sa_auth_req++;
3204 stats->n_sa_auth_req++;
3205 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3207 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3209 vlib_node_increment_counter (vm, node->node_index,
3210 IKEV2_ERROR_NO_BUFF_SPACE,
3215 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3218 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3221 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3222 slen = ikev2_retransmit_resp (sa0, ike0);
3225 vlib_node_increment_counter (vm, node->node_index,
3228 IKEV2_ERROR_IKE_REQ_IGNORE
3230 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3235 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3238 vlib_node_increment_counter (vm, node->node_index,
3239 IKEV2_ERROR_MALFORMED_PACKET,
3247 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3249 ikev2_delete_t *d, *tmp, *resp = 0;
3250 vec_foreach (d, sa0->del)
3252 ikev2_child_sa_t *ch_sa;
3253 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3255 !sa0->is_initiator);
3258 ikev2_delete_tunnel_interface (km->vnet_main,
3260 if (!sa0->is_initiator)
3262 vec_add2 (resp, tmp, 1);
3263 tmp->protocol_id = d->protocol_id;
3264 tmp->spi = ch_sa->r_proposals[0].spi;
3266 ikev2_sa_del_child_sa (sa0, ch_sa);
3269 if (!sa0->is_initiator)
3271 vec_free (sa0->del);
3276 if (ike_hdr_is_request (ike0))
3278 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3280 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3282 vlib_node_increment_counter (vm, node->node_index,
3283 IKEV2_ERROR_NO_BUFF_SPACE,
3288 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3291 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3294 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3295 slen = ikev2_retransmit_resp (sa0, ike0);
3298 vlib_node_increment_counter (vm, node->node_index,
3301 IKEV2_ERROR_IKE_REQ_IGNORE
3303 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3308 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3311 vlib_node_increment_counter (vm, node->node_index,
3312 IKEV2_ERROR_MALFORMED_PACKET,
3320 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3323 ikev2_sa_free_all_child_sa (&sa0->childs);
3324 ikev2_child_sa_t *child;
3325 vec_add2 (sa0->childs, child, 1);
3326 clib_memset (child, 0, sizeof (*child));
3327 child->r_proposals = sa0->rekey[0].r_proposal;
3328 child->i_proposals = sa0->rekey[0].i_proposal;
3329 child->tsi = sa0->rekey[0].tsi;
3330 child->tsr = sa0->rekey[0].tsr;
3331 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3332 child - sa0->childs, 1);
3334 if (ike_hdr_is_response (ike0))
3336 vec_free (sa0->rekey);
3340 stats->n_rekey_req++;
3341 sa0->stats.n_rekey_req++;
3342 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3344 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3346 vlib_node_increment_counter (vm, node->node_index,
3347 IKEV2_ERROR_NO_BUFF_SPACE,
3351 else if (sa0->new_child)
3353 ikev2_child_sa_t *c;
3354 vec_add2 (sa0->childs, c, 1);
3355 memset (c, 0, sizeof (*c));
3356 c->r_proposals = sa0->new_child[0].r_proposal;
3357 c->i_proposals = sa0->new_child[0].i_proposal;
3358 c->tsi = sa0->new_child[0].tsi;
3359 c->tsr = sa0->new_child[0].tsr;
3360 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3361 c - sa0->childs, 0);
3362 if (ike_hdr_is_request (ike0))
3364 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3366 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3368 vlib_node_increment_counter (
3369 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3376 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3380 /* if we are sending packet back, rewrite headers */
3381 if (slen && ~0 != slen)
3385 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3386 ikev2_rewrite_v4_addrs (sa0, ip40);
3390 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3391 ikev2_rewrite_v6_addrs (sa0, ip60);
3396 udp0->dst_port = udp0->src_port =
3397 clib_net_to_host_u16 (ikev2_get_port (sa0));
3399 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3400 && ikev2_natt_active (sa0))
3403 slen = ikev2_insert_non_esp_marker (ike0, slen);
3409 slen += sizeof (ikev2_non_esp_marker);
3411 u16 tp = udp0->dst_port;
3412 udp0->dst_port = udp0->src_port;
3413 udp0->src_port = tp;
3416 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3418 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3421 ip40->length = clib_host_to_net_u16 (b0->current_length);
3422 ip40->checksum = ip4_header_checksum (ip40);
3426 ip60->payload_length =
3427 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3431 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3432 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3434 ikev2_child_sa_t *c;
3436 vec_foreach (c, sa0->childs)
3437 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3439 ikev2_delete_sa (ptd, sa0);
3441 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3442 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3445 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3446 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3447 t->next_index = next[0];
3454 ikev2_update_stats (vm, node->node_index, stats);
3455 vlib_node_increment_counter (vm, node->node_index,
3456 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3457 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3458 return frame->n_vectors;
3462 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3464 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3468 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3469 vlib_frame_t *frame)
3471 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3475 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3477 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3481 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3482 .function = ikev2_ip4,
3483 .name = "ikev2-ip4",
3484 .vector_size = sizeof (u32),
3485 .format_trace = format_ikev2_trace,
3486 .type = VLIB_NODE_TYPE_INTERNAL,
3488 .n_errors = IKEV2_N_ERROR,
3489 .error_counters = ikev2_error_counters,
3491 .n_next_nodes = IKEV2_IP4_N_NEXT,
3493 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3494 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3498 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3499 .function = ikev2_ip4_natt,
3500 .name = "ikev2-ip4-natt",
3501 .vector_size = sizeof (u32),
3502 .format_trace = format_ikev2_trace,
3503 .type = VLIB_NODE_TYPE_INTERNAL,
3505 .n_errors = IKEV2_N_ERROR,
3506 .error_counters = ikev2_error_counters,
3508 .n_next_nodes = IKEV2_IP4_N_NEXT,
3510 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3511 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3515 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3516 .function = ikev2_ip6,
3517 .name = "ikev2-ip6",
3518 .vector_size = sizeof (u32),
3519 .format_trace = format_ikev2_trace,
3520 .type = VLIB_NODE_TYPE_INTERNAL,
3522 .n_errors = IKEV2_N_ERROR,
3523 .error_counters = ikev2_error_counters,
3525 .n_next_nodes = IKEV2_IP6_N_NEXT,
3527 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3528 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3533 // set ikev2 proposals when vpp is used as initiator
3534 static clib_error_t *
3535 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3536 ikev2_transforms_set * ts,
3537 ikev2_sa_proposal_t ** proposals, int is_ike)
3540 ikev2_main_t *km = &ikev2_main;
3541 ikev2_sa_proposal_t *proposal;
3542 vec_add2 (*proposals, proposal, 1);
3543 ikev2_sa_transform_t *td;
3548 vec_foreach (td, km->supported_transforms)
3550 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3551 && td->encr_type == ts->crypto_alg
3552 && td->key_len == ts->crypto_key_size / 8)
3555 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3556 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3557 vec_add (td->attrs, (u8 *) attr, 4);
3558 vec_add1 (proposal->transforms, *td);
3567 r = clib_error_return (0, "Unsupported algorithm");
3571 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3575 vec_foreach (td, km->supported_transforms)
3577 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3578 && td->integ_type == ts->integ_alg)
3580 vec_add1 (proposal->transforms, *td);
3588 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3589 r = clib_error_return (0, "Unsupported algorithm");
3598 vec_foreach (td, km->supported_transforms)
3600 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3601 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3603 vec_add1 (proposal->transforms, *td);
3610 r = clib_error_return (0, "Unsupported algorithm");
3619 vec_foreach (td, km->supported_transforms)
3621 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3623 vec_add1 (proposal->transforms, *td);
3626 sa->dh_group = td->dh_type;
3634 r = clib_error_return (0, "Unsupported algorithm");
3642 vec_foreach (td, km->supported_transforms)
3644 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3646 vec_add1 (proposal->transforms, *td);
3652 r = clib_error_return (0, "Unsupported algorithm");
3661 static ikev2_profile_t *
3662 ikev2_profile_index_by_name (u8 * name)
3664 ikev2_main_t *km = &ikev2_main;
3667 p = mhash_get (&km->profile_index_by_name, name);
3671 return pool_elt_at_index (km->profiles, p[0]);
3676 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3677 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3686 b0 = vlib_get_buffer (vm, bi0);
3687 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3688 udp0 = vlib_buffer_get_current (b0);
3689 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3690 udp0->src_port = clib_host_to_net_u16 (src_port);
3691 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3694 if (ip_addr_version (dst) == AF_IP4)
3696 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3697 ip40 = vlib_buffer_get_current (b0);
3698 ip40->ip_version_and_header_length = 0x45;
3700 ip40->fragment_id = 0;
3701 ip40->flags_and_fragment_offset = 0;
3703 ip40->protocol = IP_PROTOCOL_UDP;
3704 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3705 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3706 b0->current_length =
3707 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3708 ip40->length = clib_host_to_net_u16 (b0->current_length);
3709 ip40->checksum = ip4_header_checksum (ip40);
3713 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3714 ip60 = vlib_buffer_get_current (b0);
3716 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3717 ip60->ip_version_traffic_class_and_flow_label =
3718 clib_host_to_net_u32 (0x6 << 28);
3719 ip60->payload_length =
3720 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3721 ip60->protocol = IP_PROTOCOL_UDP;
3722 ip60->hop_limit = 0xff;
3723 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3724 sizeof (ip60->src_address));
3725 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3726 sizeof (ip60->src_address));
3729 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3730 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3731 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3733 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3734 ip4_lookup_node.index : ip6_lookup_node.index;
3736 /* send the request */
3737 f = vlib_get_frame_to_node (vm, next_index);
3738 to_next = vlib_frame_vector_args (f);
3741 vlib_put_frame_to_node (vm, next_index, f);
3746 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3749 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3754 *b = vlib_get_buffer (vm, bi0);
3759 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3761 ikev2_main_t *km = &ikev2_main;
3764 EVP_PKEY_free (km->pkey);
3765 km->pkey = ikev2_load_key_file (file);
3766 if (km->pkey == NULL)
3767 return clib_error_return (0, "load key '%s' failed", file);
3772 static vnet_api_error_t
3773 ikev2_register_udp_port (ikev2_profile_t *p, u16 port)
3775 ipsec_register_udp_port (port);
3776 p->ipsec_over_udp_port = port;
3781 ikev2_unregister_udp_port (ikev2_profile_t *p)
3783 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3786 ipsec_unregister_udp_port (p->ipsec_over_udp_port);
3787 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3791 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3792 ikev2_main_per_thread_data_t * tkm,
3793 ikev2_sa_t * sa, u8 send_notification)
3795 ikev2_main_t *km = &ikev2_main;
3796 ip_address_t *src, *dst;
3798 ikev2_child_sa_t *c;
3800 /* Create the Initiator notification for IKE SA removal */
3805 vec_resize (sa->del, 1);
3806 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3807 sa->del->spi = sa->ispi;
3809 if (send_notification)
3811 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3814 ikev2_log_error ("buffer alloc failure");
3818 ike0 = vlib_buffer_get_current (b0);
3819 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3820 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3821 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3823 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3824 sa->last_init_msg_id += 1;
3825 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3829 if (ikev2_natt_active (sa))
3830 len = ikev2_insert_non_esp_marker (ike0, len);
3832 if (sa->is_initiator)
3843 ikev2_send_ike (vm, src, dst, bi0, len,
3844 ikev2_get_port (sa), sa->dst_port, 0);
3848 /* delete local SA */
3849 vec_foreach (c, sa->childs)
3850 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3852 u64 rspi = sa->rspi;
3853 ikev2_sa_free_all_vec (sa);
3854 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3857 hash_unset (tkm->sa_by_rspi, rspi);
3858 pool_put (tkm->sas, sa);
3863 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3865 ikev2_main_per_thread_data_t *tkm;
3867 u32 pi = p - km->profiles;
3872 pool_foreach (sa, km->sais) {
3873 if (pi == sa->profile_index)
3874 vec_add1 (del_sai, sa - km->sais);
3878 vec_foreach (sai, del_sai)
3880 sa = pool_elt_at_index (km->sais, sai[0]);
3881 ikev2_sa_free_all_vec (sa);
3882 hash_unset (km->sa_by_ispi, sa->ispi);
3883 pool_put (km->sais, sa);
3885 vec_reset_length (del_sai);
3887 vec_foreach (tkm, km->per_thread_data)
3890 pool_foreach (sa, tkm->sas) {
3891 if (sa->profile_index != ~0 && pi == sa->profile_index)
3892 vec_add1 (del_sai, sa - tkm->sas);
3896 vec_foreach (sai, del_sai)
3898 sa = pool_elt_at_index (tkm->sas, sai[0]);
3899 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3902 vec_reset_length (del_sai);
3909 ikev2_profile_responder_free (ikev2_responder_t *r)
3911 vec_free (r->hostname);
3915 ikev2_profile_free (ikev2_profile_t * p)
3919 vec_free (p->auth.data);
3921 EVP_PKEY_free (p->auth.key);
3923 ikev2_profile_responder_free (&p->responder);
3925 vec_free (p->loc_id.data);
3926 vec_free (p->rem_id.data);
3930 ikev2_bind (vlib_main_t *vm, ikev2_main_t *km)
3932 if (0 == km->bind_refcount)
3934 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
3935 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
3936 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
3937 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
3939 vlib_punt_register (km->punt_hdl,
3940 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3944 km->bind_refcount++;
3948 ikev2_unbind (vlib_main_t *vm, ikev2_main_t *km)
3950 km->bind_refcount--;
3951 if (0 == km->bind_refcount)
3953 vlib_punt_unregister (km->punt_hdl,
3954 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3957 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 0);
3958 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 1);
3959 udp_unregister_dst_port (vm, IKEV2_PORT, 0);
3960 udp_unregister_dst_port (vm, IKEV2_PORT, 1);
3964 static void ikev2_lazy_init (ikev2_main_t *km);
3967 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3969 ikev2_main_t *km = &ikev2_main;
3972 ikev2_lazy_init (km);
3976 if (ikev2_profile_index_by_name (name))
3977 return clib_error_return (0, "policy %v already exists", name);
3979 pool_get (km->profiles, p);
3980 clib_memset (p, 0, sizeof (*p));
3981 p->name = vec_dup (name);
3982 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3983 p->responder.sw_if_index = ~0;
3985 uword index = p - km->profiles;
3986 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3988 ikev2_bind (vm, km);
3992 p = ikev2_profile_index_by_name (name);
3994 return clib_error_return (0, "policy %v does not exists", name);
3996 ikev2_unbind (vm, km);
3998 ikev2_unregister_udp_port (p);
3999 ikev2_cleanup_profile_sessions (km, p);
4001 ikev2_profile_free (p);
4002 pool_put (km->profiles, p);
4003 mhash_unset (&km->profile_index_by_name, name, 0);
4009 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
4010 u8 * auth_data, u8 data_hex_format)
4015 p = ikev2_profile_index_by_name (name);
4019 r = clib_error_return (0, "unknown profile %v", name);
4024 EVP_PKEY_free (p->auth.key);
4025 vec_free (p->auth.data);
4027 p->auth.method = auth_method;
4028 p->auth.data = vec_dup (auth_data);
4029 p->auth.hex = data_hex_format;
4031 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
4033 vec_add1 (p->auth.data, 0);
4034 p->auth.key = ikev2_load_cert_file (p->auth.data);
4035 if (p->auth.key == NULL)
4036 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
4043 ikev2_is_id_supported (u8 id_type)
4045 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
4046 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
4047 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
4048 id_type == IKEV2_ID_TYPE_ID_FQDN);
4052 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
4058 if (!ikev2_is_id_supported (id_type))
4060 r = clib_error_return (0, "unsupported identity type %U",
4061 format_ikev2_id_type, id_type);
4065 p = ikev2_profile_index_by_name (name);
4069 r = clib_error_return (0, "unknown profile %v", name);
4075 vec_free (p->loc_id.data);
4076 p->loc_id.type = id_type;
4077 p->loc_id.data = vec_dup (data);
4081 vec_free (p->rem_id.data);
4082 p->rem_id.type = id_type;
4083 p->rem_id.data = vec_dup (data);
4090 ikev2_set_ts_type (ikev2_ts_t *ts, const ip_address_t *addr)
4092 if (ip_addr_version (addr) == AF_IP4)
4093 ts->ts_type = TS_IPV4_ADDR_RANGE;
4095 ts->ts_type = TS_IPV6_ADDR_RANGE;
4099 ikev2_set_ts_addrs (ikev2_ts_t *ts, const ip_address_t *start,
4100 const ip_address_t *end)
4102 ip_address_copy (&ts->start_addr, start);
4103 ip_address_copy (&ts->end_addr, end);
4107 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4108 u16 start_port, u16 end_port, ip_address_t start_addr,
4109 ip_address_t end_addr, int is_local)
4114 p = ikev2_profile_index_by_name (name);
4118 r = clib_error_return (0, "unknown profile %v", name);
4122 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4123 return clib_error_return (0, "IP address version mismatch!");
4127 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4128 p->loc_ts.start_port = start_port;
4129 p->loc_ts.end_port = end_port;
4130 p->loc_ts.protocol_id = protocol_id;
4131 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4135 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4136 p->rem_ts.start_port = start_port;
4137 p->rem_ts.end_port = end_port;
4138 p->rem_ts.protocol_id = protocol_id;
4139 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4146 ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname,
4152 p = ikev2_profile_index_by_name (name);
4156 r = clib_error_return (0, "unknown profile %v", name);
4160 p->responder.is_resolved = 0;
4161 p->responder.sw_if_index = sw_if_index;
4162 p->responder.hostname = vec_dup (hostname);
4168 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4169 u32 sw_if_index, ip_address_t addr)
4174 p = ikev2_profile_index_by_name (name);
4178 r = clib_error_return (0, "unknown profile %v", name);
4182 p->responder.is_resolved = 1;
4183 p->responder.sw_if_index = sw_if_index;
4184 ip_address_copy (&p->responder.addr, &addr);
4190 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4191 ikev2_transform_encr_type_t crypto_alg,
4192 ikev2_transform_integ_type_t integ_alg,
4193 ikev2_transform_dh_type_t dh_type,
4194 u32 crypto_key_size)
4198 p = ikev2_profile_index_by_name (name);
4200 return clib_error_return (0, "unknown profile %v", name);
4202 if ((IKEV2_TRANSFORM_INTEG_TYPE_NONE != integ_alg) +
4203 (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 == crypto_alg) !=
4205 return clib_error_return (0, "invalid cipher + integrity algorithm");
4207 p->ike_ts.crypto_alg = crypto_alg;
4208 p->ike_ts.integ_alg = integ_alg;
4209 p->ike_ts.dh_type = dh_type;
4210 p->ike_ts.crypto_key_size = crypto_key_size;
4215 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4216 ikev2_transform_encr_type_t crypto_alg,
4217 ikev2_transform_integ_type_t integ_alg,
4218 u32 crypto_key_size)
4223 p = ikev2_profile_index_by_name (name);
4227 r = clib_error_return (0, "unknown profile %v", name);
4231 p->esp_ts.crypto_alg = crypto_alg;
4232 p->esp_ts.integ_alg = integ_alg;
4233 p->esp_ts.crypto_key_size = crypto_key_size;
4238 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4239 u8 * name, u32 sw_if_index)
4244 p = ikev2_profile_index_by_name (name);
4248 r = clib_error_return (0, "unknown profile %v", name);
4252 p->tun_itf = sw_if_index;
4258 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4261 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4262 vnet_api_error_t rv = 0;
4265 return VNET_API_ERROR_INVALID_VALUE;
4269 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4270 return VNET_API_ERROR_VALUE_EXIST;
4272 rv = ikev2_register_udp_port (p, port);
4276 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4277 return VNET_API_ERROR_INVALID_VALUE;
4279 ikev2_unregister_udp_port (p);
4285 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4287 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4292 r = clib_error_return (0, "unknown profile %v", name);
4301 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4302 u64 lifetime, u32 jitter, u32 handover,
4308 p = ikev2_profile_index_by_name (name);
4312 r = clib_error_return (0, "unknown profile %v", name);
4316 p->lifetime = lifetime;
4317 p->lifetime_jitter = jitter;
4318 p->handover = handover;
4319 p->lifetime_maxdata = maxdata;
4324 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4325 ip_address_t * out_addr)
4327 ip4_address_t *if_ip4;
4328 ip6_address_t *if_ip6;
4332 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4335 ip_address_set (out_addr, if_ip4, AF_IP4);
4341 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4344 ip_address_set (out_addr, if_ip6, AF_IP6);
4351 static clib_error_t *
4352 ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r)
4354 ikev2_main_t *km = &ikev2_main;
4355 dns_cache_entry_t *ep = 0;
4356 dns_pending_request_t _t0, *t0 = &_t0;
4357 dns_resolve_name_t _rn, *rn = &_rn;
4361 if (!km->dns_resolve_name)
4362 return clib_error_return (0, "cannot load symbols from dns plugin");
4364 t0->request_type = DNS_API_PENDING_NAME_TO_IP;
4365 /* VPP main curse: IKEv2 uses only non-NULL terminated vectors internally
4366 * whereas DNS resolver expects a NULL-terminated C-string */
4367 name = vec_dup (r->hostname);
4368 vec_terminate_c_string (name);
4369 rv = km->dns_resolve_name (name, &ep, t0, rn);
4372 return clib_error_return (0, "dns lookup failure");
4377 ip_address_copy (&r->addr, &rn->address);
4383 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4387 ikev2_main_t *km = &ikev2_main;
4391 int len = sizeof (ike_header_t), valid_ip = 0;
4392 ip_address_t src_if_ip = ip_address_initializer;
4394 p = ikev2_profile_index_by_name (name);
4398 r = clib_error_return (0, "unknown profile %v", name);
4402 if (p->responder.sw_if_index == ~0 ||
4403 (ip_address_is_zero (&p->responder.addr) &&
4404 vec_len (p->responder.hostname) == 0))
4406 r = clib_error_return (0, "responder not set for profile %v", name);
4410 if (!p->responder.is_resolved)
4412 /* try to resolve using dns plugin
4413 * success does not mean we have resolved the name */
4414 r = ikev2_resolve_responder_hostname (vm, &p->responder);
4419 if (p->responder.is_resolved &&
4420 ikev2_get_if_address (p->responder.sw_if_index,
4421 ip_addr_version (&p->responder.addr), &src_if_ip))
4426 /* Prepare the SA and the IKE payload */
4428 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4429 ikev2_payload_chain_t *chain = 0;
4430 ikev2_payload_new_chain (chain);
4432 /* Build the IKE proposal payload */
4433 ikev2_sa_proposal_t *proposals = 0;
4434 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4435 proposals[0].proposal_num = 1;
4436 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4438 /* Add and then cleanup proposal data */
4439 ikev2_payload_add_sa (chain, proposals);
4440 ikev2_sa_free_proposal_vector (&proposals);
4442 sa.is_initiator = 1;
4443 sa.profile_index = p - km->profiles;
4444 sa.state = IKEV2_STATE_SA_INIT;
4445 sa.tun_itf = p->tun_itf;
4446 sa.udp_encap = p->udp_encap;
4447 if (p->natt_disabled)
4448 sa.natt_state = IKEV2_NATT_DISABLED;
4449 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4450 sa.is_tun_itf_set = 1;
4451 sa.initial_contact = 1;
4452 sa.dst_port = IKEV2_PORT;
4454 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4455 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4457 ikev2_sa_free_all_vec (&sa);
4458 ikev2_payload_destroy_chain (chain);
4459 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4462 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4463 ikev2_payload_add_nonce (chain, sa.i_nonce);
4465 /* Build the child SA proposal */
4466 vec_resize (sa.childs, 1);
4467 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4468 &sa.childs[0].i_proposals, 0);
4469 sa.childs[0].i_proposals[0].proposal_num = 1;
4470 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4471 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4472 sizeof (sa.childs[0].i_proposals[0].spi));
4474 /* Add NAT detection notification messages (mandatory) */
4475 u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 (
4476 clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip,
4477 clib_host_to_net_u16 (IKEV2_PORT));
4479 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4480 nat_detection_sha1);
4481 vec_free (nat_detection_sha1);
4482 nat_detection_sha1 =
4483 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4484 clib_host_to_net_u64 (sa.rspi),
4486 clib_host_to_net_u16 (sa.dst_port));
4487 ikev2_payload_add_notify (chain,
4488 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4489 nat_detection_sha1);
4490 vec_free (nat_detection_sha1);
4492 u8 *sig_hash_algo = vec_new (u8, 8);
4493 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4494 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4495 ikev2_payload_add_notify (chain,
4496 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4498 vec_free (sig_hash_algo);
4500 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4503 ikev2_sa_free_all_vec (&sa);
4504 ikev2_payload_destroy_chain (chain);
4505 char *errmsg = "buffer alloc failure";
4506 ikev2_log_error (errmsg);
4507 return clib_error_return (0, errmsg);
4509 ike0 = vlib_buffer_get_current (b0);
4511 /* Buffer update and boilerplate */
4512 len += vec_len (chain->data);
4513 ike0->nextpayload = chain->first_payload_type;
4514 ike0->length = clib_host_to_net_u32 (len);
4515 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4516 ikev2_payload_destroy_chain (chain);
4518 ike0->version = IKE_VERSION_2;
4519 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4520 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4521 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4524 sa.last_init_msg_id += 1;
4526 /* store whole IKE payload - needed for PSK auth */
4527 vec_reset_length (sa.last_sa_init_req_packet_data);
4528 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4530 /* add data to the SA then add it to the pool */
4531 ip_address_copy (&sa.iaddr, &src_if_ip);
4532 ip_address_copy (&sa.raddr, &p->responder.addr);
4533 sa.i_id.type = p->loc_id.type;
4534 sa.i_id.data = vec_dup (p->loc_id.data);
4535 sa.r_id.type = p->rem_id.type;
4536 sa.r_id.data = vec_dup (p->rem_id.data);
4537 sa.i_auth.method = p->auth.method;
4538 sa.i_auth.hex = p->auth.hex;
4539 sa.i_auth.data = vec_dup (p->auth.data);
4540 sa.sw_if_index = p->responder.sw_if_index;
4541 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4542 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4544 ikev2_initial_contact_cleanup (0, &sa);
4546 /* add SA to the pool */
4547 ikev2_sa_t *sa0 = 0;
4548 pool_get (km->sais, sa0);
4549 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4550 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4554 ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT,
4555 sa.dst_port, sa.sw_if_index);
4558 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4559 clib_host_to_net_u64 (sa0->ispi), 0,
4560 ip_addr_v4 (&p->responder.addr).as_u32,
4561 ip_addr_version (&p->responder.addr) == AF_IP4);
4568 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4569 ikev2_child_sa_t * csa)
4571 /* Create the Initiator notification for child SA removal */
4572 ikev2_main_t *km = &ikev2_main;
4578 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4581 ikev2_log_error ("buffer alloc failure");
4585 ike0 = vlib_buffer_get_current (b0);
4586 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4587 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4588 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4590 vec_resize (sa->del, 1);
4591 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4592 sa->del->spi = csa->i_proposals->spi;
4593 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4594 sa->last_init_msg_id += 1;
4595 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4599 if (ikev2_natt_active (sa))
4600 len = ikev2_insert_non_esp_marker (ike0, len);
4601 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4602 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4604 /* delete local child SA */
4605 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4606 ikev2_sa_del_child_sa (sa, csa);
4610 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4613 ikev2_main_t *km = &ikev2_main;
4614 ikev2_main_per_thread_data_t *tkm;
4615 ikev2_sa_t *fsa = 0;
4616 ikev2_child_sa_t *fchild = 0;
4618 /* Search for the child SA */
4619 vec_foreach (tkm, km->per_thread_data)
4625 pool_foreach (sa, tkm->sas) {
4626 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4636 if (!fchild || !fsa)
4638 r = clib_error_return (0, "Child SA not found");
4643 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4650 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4653 ikev2_main_t *km = &ikev2_main;
4654 ikev2_main_per_thread_data_t *tkm;
4655 ikev2_sa_t *fsa = 0;
4656 ikev2_main_per_thread_data_t *ftkm = 0;
4658 /* Search for the IKE SA */
4659 vec_foreach (tkm, km->per_thread_data)
4665 pool_foreach (sa, tkm->sas) {
4666 if (sa->ispi == ispi)
4678 r = clib_error_return (0, "IKE SA not found");
4682 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4687 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4688 ikev2_child_sa_t * csa)
4690 /* Create the Initiator request for create child SA */
4696 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4699 ikev2_log_error ("buffer alloc failure");
4703 ike0 = vlib_buffer_get_current (b0);
4704 ike0->version = IKE_VERSION_2;
4705 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4706 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4707 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4708 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4709 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4710 sa->last_init_msg_id += 1;
4712 ikev2_rekey_t *rekey;
4713 vec_reset_length (sa->rekey);
4714 vec_add2 (sa->rekey, rekey, 1);
4715 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4718 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4719 rekey->spi = proposals[0].spi;
4720 rekey->ispi = csa->i_proposals->spi;
4721 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4725 if (ikev2_natt_active (sa))
4726 len = ikev2_insert_non_esp_marker (ike0, len);
4727 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4728 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4729 vec_free (proposals);
4733 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4736 ikev2_main_t *km = &ikev2_main;
4737 ikev2_main_per_thread_data_t *tkm;
4738 ikev2_sa_t *fsa = 0;
4739 ikev2_child_sa_t *fchild = 0;
4741 /* Search for the child SA */
4742 vec_foreach (tkm, km->per_thread_data)
4748 pool_foreach (sa, tkm->sas) {
4749 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4759 if (!fchild || !fsa)
4761 r = clib_error_return (0, "Child SA not found");
4766 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4773 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4775 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4779 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4781 u64 *ispi, *ispi_vec = 0;
4782 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4783 ikev2_main_t *km = &ikev2_main;
4784 ikev2_main_per_thread_data_t *tkm;
4785 p->responder.sw_if_index = ~0;
4787 vec_foreach (tkm, km->per_thread_data)
4790 pool_foreach (sa, tkm->sas) {
4791 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4792 vec_add1 (sa_vec, sa);
4796 vec_foreach (sap, sa_vec)
4798 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4800 vec_reset_length (sa_vec);
4805 pool_foreach (sa, km->sais) {
4806 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4807 vec_add1 (ispi_vec, sa->ispi);
4811 vec_foreach (ispi, ispi_vec)
4813 ikev2_del_sa_init_from_main (ispi);
4816 vec_free (ispi_vec);
4819 static clib_error_t *
4820 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4822 ikev2_main_t *km = &ikev2_main;
4829 pool_foreach (p, km->profiles) {
4830 if (p->responder.sw_if_index == sw_if_index)
4831 ikev2_sa_del (p, sw_if_index);
4838 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4841 ikev2_init (vlib_main_t * vm)
4843 ikev2_main_t *km = &ikev2_main;
4845 clib_memset (km, 0, sizeof (ikev2_main_t));
4847 km->log_level = IKEV2_LOG_ERROR;
4848 km->log_class = vlib_log_register_class ("ikev2", 0);
4850 km->vnet_main = vnet_get_main ();
4853 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4854 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4860 VLIB_INIT_FUNCTION (ikev2_init) = {
4861 .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init"),
4866 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4869 ikev2_main_t *km = &ikev2_main;
4870 ikev2_profile_t *p = 0;
4871 vlib_main_t *vm = km->vlib_main;
4872 f64 now = vlib_time_now (vm);
4875 if (sa->profile_index != ~0)
4876 p = pool_elt_at_index (km->profiles, sa->profile_index);
4878 if (sa->is_initiator && p && csa->time_to_expiration
4879 && now > csa->time_to_expiration)
4881 if (!csa->is_expired || csa->rekey_retries > 0)
4883 ikev2_rekey_child_sa_internal (vm, sa, csa);
4884 csa->time_to_expiration = now + p->handover;
4885 csa->is_expired = 1;
4886 if (csa->rekey_retries == 0)
4888 csa->rekey_retries = 5;
4890 else if (csa->rekey_retries > 0)
4892 csa->rekey_retries--;
4893 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4894 csa->i_proposals->spi, csa->rekey_retries);
4895 if (csa->rekey_retries == 0)
4897 csa->rekey_retries = -1;
4904 csa->time_to_expiration = 0;
4905 ikev2_delete_child_sa_internal (vm, sa, csa);
4913 ipip_tunnel_t *ipip = NULL;
4914 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4915 if (~0 == sw_if_index)
4917 ip46_address_t local_ip;
4918 ip46_address_t remote_ip;
4919 if (sa->is_initiator)
4921 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4922 ip_addr_bytes (&sa->iaddr));
4923 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4924 ip_addr_bytes (&sa->raddr));
4928 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4929 ip_addr_bytes (&sa->raddr));
4930 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4931 ip_addr_bytes (&sa->iaddr));
4935 ipip_tunnel_key_t key = {
4938 .transport = IPIP_TRANSPORT_IP4,
4943 ipip = ipip_tunnel_db_find (&key);
4946 sw_if_index = ipip->sw_if_index;
4952 vec_add1 (sas_in, csa->remote_sa_id);
4953 vlib_worker_thread_barrier_sync (vm);
4954 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4955 csa->local_sa_id, sas_in);
4958 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4959 vlib_worker_thread_barrier_release (vm);
4966 ikev2_set_log_level (ikev2_log_level_t log_level)
4968 ikev2_main_t *km = &ikev2_main;
4970 if (log_level >= IKEV2_LOG_MAX)
4972 ikev2_log_error ("unknown logging level %d", log_level);
4976 km->log_level = log_level;
4981 ikev2_set_liveness_params (u32 period, u32 max_retries)
4983 ikev2_main_t *km = &ikev2_main;
4985 if (period == 0 || max_retries == 0)
4986 return clib_error_return (0, "invalid args");
4988 km->liveness_period = period;
4989 km->liveness_max_retries = max_retries;
4994 ikev2_profile_natt_disable (u8 * name)
4996 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4998 return clib_error_return (0, "unknown profile %v", name);
5000 p->natt_disabled = 1;
5005 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
5007 ikev2_main_t *km = &ikev2_main;
5008 vlib_main_t *vm = km->vlib_main;
5009 ikev2_main_per_thread_data_t *tkm;
5010 ikev2_sa_t *fsa = 0;
5011 ikev2_profile_t *p = 0;
5012 ikev2_child_sa_t *fchild = 0;
5013 f64 now = vlib_time_now (vm);
5014 vlib_counter_t counts;
5016 /* Search for the SA and child SA */
5017 vec_foreach (tkm, km->per_thread_data)
5023 pool_foreach (sa, tkm->sas) {
5024 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
5033 vlib_get_combined_counter (&ipsec_sa_counters,
5034 ipsec_sa->stat_index, &counts);
5036 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
5037 p = pool_elt_at_index (km->profiles, fsa->profile_index);
5039 if (fchild && p && p->lifetime_maxdata)
5041 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
5043 fchild->time_to_expiration = now;
5049 ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km,
5055 p = pool_elt_at_index (km->profiles, sa->profile_index);
5057 if (!p->responder.is_resolved)
5059 clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder);
5062 clib_error_free (r);
5066 if (!p->responder.is_resolved)
5069 ip_address_copy (&sa->raddr, &p->responder.addr);
5071 /* update nat detection destination hash */
5072 np = ikev2_find_ike_notify_payload (
5073 (ike_header_t *) sa->last_sa_init_req_packet_data,
5074 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP);
5077 nat_sha = ikev2_compute_nat_sha1 (
5078 clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi),
5079 &sa->raddr, clib_host_to_net_u16 (sa->dst_port));
5080 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5085 if (ip_address_is_zero (&sa->iaddr))
5087 if (!ikev2_get_if_address (p->responder.sw_if_index,
5088 ip_addr_version (&p->responder.addr),
5092 /* update NAT detection payload */
5094 ikev2_find_ike_notify_payload
5095 ((ike_header_t *) sa->last_sa_init_req_packet_data,
5096 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
5100 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
5101 clib_host_to_net_u64 (sa->rspi),
5103 clib_host_to_net_u16 (IKEV2_PORT));
5104 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5109 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5112 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5113 clib_memcpy_fast (vlib_buffer_get_current (b),
5114 sa->last_sa_init_req_packet_data,
5115 vec_len (sa->last_sa_init_req_packet_data));
5117 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5118 vec_len (sa->last_sa_init_req_packet_data),
5119 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5123 ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km)
5130 hash_foreach (ispi, sai, km->sa_by_ispi,
5132 sa = pool_elt_at_index (km->sais, sai);
5133 if (sa->init_response_received)
5136 ikev2_process_pending_sa_init_one (vm, km, sa);
5142 ikev2_send_informational_request (ikev2_sa_t * sa)
5144 ikev2_main_t *km = &ikev2_main;
5145 ip_address_t *src, *dst;
5152 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5155 ikev2_log_error ("buffer alloc failure");
5159 ike0 = vlib_buffer_get_current (b0);
5160 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5161 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5162 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5163 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5165 sa->last_init_msg_id += 1;
5166 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5170 if (ikev2_natt_active (sa))
5171 len = ikev2_insert_non_esp_marker (ike0, len);
5173 if (sa->is_initiator)
5184 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5185 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5190 ikev2_disable_dpd (void)
5192 ikev2_main_t *km = &ikev2_main;
5193 km->dpd_disabled = 1;
5197 ikev2_mngr_process_responder_sas (ikev2_sa_t *sa)
5199 ikev2_main_t *km = &ikev2_main;
5200 vlib_main_t *vm = km->vlib_main;
5202 if (!sa->keys_generated)
5205 if (sa->liveness_retries >= km->liveness_max_retries)
5208 f64 now = vlib_time_now (vm);
5210 if (sa->liveness_period_check < now)
5212 sa->liveness_retries++;
5213 sa->liveness_period_check = now + km->liveness_period;
5214 ikev2_send_informational_request (sa);
5220 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5223 ikev2_main_t *km = &ikev2_main;
5225 ikev2_child_sa_t *c;
5228 /* lazy init will wake it up */
5229 vlib_process_wait_for_event (vm);
5233 vlib_process_wait_for_event_or_clock (vm, 2);
5234 vlib_process_get_events (vm, NULL);
5236 /* process ike child sas */
5237 ikev2_main_per_thread_data_t *tkm;
5238 vec_foreach (tkm, km->per_thread_data)
5241 u32 *to_be_deleted = 0;
5244 pool_foreach (sa, tkm->sas) {
5245 ikev2_child_sa_t *c;
5248 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5251 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5253 sa->old_remote_id_present = 0;
5257 sa->old_id_expiration -= 1;
5259 vec_foreach (c, sa->childs)
5260 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5262 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5263 vec_add1 (to_be_deleted, sa - tkm->sas);
5267 vec_foreach (sai, to_be_deleted)
5269 sa = pool_elt_at_index (tkm->sas, sai[0]);
5270 const u32 profile_index = sa->profile_index;
5271 const int reinitiate = (sa->is_initiator && profile_index != ~0);
5272 vec_foreach (c, sa->childs)
5274 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5275 ikev2_sa_del_child_sa (sa, c);
5277 ikev2_sa_free_all_vec (sa);
5278 hash_unset (tkm->sa_by_rspi, sa->rspi);
5279 pool_put (tkm->sas, sa);
5283 p = pool_elt_at_index (km->profiles, profile_index);
5286 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5289 ikev2_log_error ("%U", format_clib_error, e);
5290 clib_error_free (e);
5295 vec_free (to_be_deleted);
5298 /* process ipsec sas */
5301 pool_foreach (sa, ipsec_sa_pool)
5303 ikev2_mngr_process_ipsec_sa (sa);
5307 ikev2_process_pending_sa_init (vm, km);
5313 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5314 .function = ikev2_mngr_process_fn,
5315 .type = VLIB_NODE_TYPE_PROCESS,
5317 "ikev2-manager-process",
5321 ikev2_lazy_init (ikev2_main_t *km)
5323 vlib_thread_main_t *tm = vlib_get_thread_main ();
5326 if (km->lazy_init_done)
5329 ikev2_crypto_init (km);
5331 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
5333 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
5334 CLIB_CACHE_LINE_BYTES);
5335 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
5337 ikev2_main_per_thread_data_t *ptd =
5338 vec_elt_at_index (km->per_thread_data, thread_id);
5340 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
5342 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
5343 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
5344 ptd->hmac_ctx = HMAC_CTX_new ();
5346 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
5347 ptd->evp_ctx = &ptd->_evp_ctx;
5348 HMAC_CTX_init (&(ptd->_hmac_ctx));
5349 ptd->hmac_ctx = &ptd->_hmac_ctx;
5353 km->sa_by_ispi = hash_create (0, sizeof (uword));
5354 km->sw_if_indices = hash_create (0, 0);
5356 km->punt_hdl = vlib_punt_client_register ("ikev2");
5358 km->dns_resolve_name =
5359 vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name");
5360 if (!km->dns_resolve_name)
5361 ikev2_log_error ("cannot load symbols from dns plugin");
5363 /* wake up ikev2 process */
5364 vlib_process_signal_event (vlib_get_first_main (),
5365 ikev2_mngr_process_node.index, 0, 0);
5367 km->lazy_init_done = 1;
5370 VLIB_PLUGIN_REGISTER () = {
5371 .version = VPP_BUILD_VER,
5372 .description = "Internet Key Exchange (IKEv2) Protocol",
5377 * fd.io coding-style-patch-verification: ON
5380 * eval: (c-set-style "gnu")