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;
1370 ikev2_rekey_t *rekey;
1371 ike_payload_header_t *ikep;
1372 ikev2_notify_t *n = 0;
1373 ikev2_ts_t *tsi = 0;
1374 ikev2_ts_t *tsr = 0;
1375 ikev2_sa_proposal_t *proposal = 0;
1376 ikev2_child_sa_t *child_sa;
1379 const u8 *nonce = 0;
1382 if (sa->is_initiator)
1383 src = ip_addr_v4 (&sa->raddr).as_u32;
1385 src = ip_addr_v4 (&sa->iaddr).as_u32;
1387 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1388 clib_host_to_net_u64 (ike->ispi),
1389 clib_host_to_net_u64 (ike->rspi), src,
1390 ip_addr_version (&sa->raddr) == AF_IP4);
1392 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1395 goto cleanup_and_exit;
1397 /* process encrypted payload */
1399 while (payload != IKEV2_PAYLOAD_NONE)
1401 ikep = (ike_payload_header_t *) & plaintext[p];
1402 int current_length = dlen - p;
1403 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1404 goto cleanup_and_exit;
1406 if (payload == IKEV2_PAYLOAD_SA)
1408 proposal = ikev2_parse_sa_payload (ikep, current_length);
1410 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1413 n0 = ikev2_parse_notify_payload (ikep, current_length);
1414 if (n0->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1422 else if (payload == IKEV2_PAYLOAD_DELETE)
1424 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1426 else if (payload == IKEV2_PAYLOAD_VENDOR)
1428 ikev2_parse_vendor_payload (ikep);
1430 else if (payload == IKEV2_PAYLOAD_NONCE)
1432 nonce_len = ikev2_parse_nonce_payload (ikep, current_length, &nonce);
1434 goto cleanup_and_exit;
1436 else if (payload == IKEV2_PAYLOAD_TSI)
1438 tsi = ikev2_parse_ts_payload (ikep, current_length);
1440 else if (payload == IKEV2_PAYLOAD_TSR)
1442 tsr = ikev2_parse_ts_payload (ikep, current_length);
1446 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1448 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1450 sa->unsupported_cp = payload;
1451 goto cleanup_and_exit;
1454 payload = ikep->nextpayload;
1458 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP || !nonce)
1459 goto cleanup_and_exit;
1461 if (sa->is_initiator)
1464 if (vec_len (rekey) == 0)
1465 goto cleanup_and_exit;
1466 rekey->notify_type = 0;
1467 rekey->protocol_id = proposal->protocol_id;
1469 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1470 rekey->i_proposal->spi = rekey->spi;
1471 rekey->r_proposal = proposal;
1475 vec_reset_length (sa->r_nonce);
1476 vec_add (sa->r_nonce, nonce, nonce_len);
1477 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1480 child_sa->rekey_retries = 0;
1487 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1490 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1492 goto cleanup_and_exit;
1494 vec_add2 (sa->rekey, rekey, 1);
1495 rekey->notify_type = 0;
1496 rekey->protocol_id = n->protocol_id;
1497 rekey->spi = n->spi;
1498 if (sa->old_remote_id_present)
1500 rekey->notify_type = IKEV2_NOTIFY_MSG_TEMPORARY_FAILURE;
1501 vec_free (proposal);
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);
1520 /* create new child SA */
1521 vec_add2 (sa->new_child, rekey, 1);
1522 rekey->notify_type = 0;
1523 rekey->i_proposal = proposal;
1525 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1527 vec_reset_length (sa->i_nonce);
1528 vec_add (sa->i_nonce, nonce, nonce_len);
1529 /* generate new Nr */
1530 vec_validate (sa->r_nonce, nonce_len - 1);
1531 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1541 vec_free (proposal);
1548 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1556 ikev2_sa_transform_t *tr_prf;
1559 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1565 nonce = sa->i_nonce;
1566 packet_data = sa->last_sa_init_res_packet_data;
1572 nonce = sa->r_nonce;
1573 packet_data = sa->last_sa_init_req_packet_data;
1576 data = vec_new (u8, 4);
1578 vec_append (data, id->data);
1580 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1581 vec_append (authmsg, packet_data);
1582 vec_append (authmsg, nonce);
1583 vec_append (authmsg, id_hash);
1591 ikev2_match_profile (const ikev2_profile_t *p, const ikev2_id_t *id_loc,
1592 const ikev2_id_t *id_rem, int is_initiator)
1594 /* on the initiator, IDi is always present and must match
1595 * however on the responder, IDr (which is our local id) is optional */
1596 if ((is_initiator || id_loc->type != 0) &&
1597 !ikev2_is_id_equal (&p->loc_id, id_loc))
1600 /* on the initiator, we might not have configured a specific remote id
1601 * however on the responder, the remote id should always be configured */
1602 if ((!is_initiator || p->rem_id.type != 0) &&
1603 !ikev2_is_id_equal (&p->rem_id, id_rem))
1610 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1612 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1613 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1614 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1615 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1622 ikev2_sa_match_ts (ikev2_sa_t * sa)
1624 ikev2_main_t *km = &ikev2_main;
1626 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1627 ikev2_id_t *id_rem, *id_loc;
1630 pool_foreach (p, km->profiles) {
1632 if (sa->is_initiator)
1647 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1650 sa->profile_index = p - km->profiles;
1652 vec_foreach(ts, sa->childs[0].tsi)
1654 if (ikev2_ts_cmp(p_tsi, ts))
1656 vec_add1 (tsi, ts[0]);
1661 vec_foreach(ts, sa->childs[0].tsr)
1663 if (ikev2_ts_cmp(p_tsr, ts))
1665 vec_add1 (tsr, ts[0]);
1676 vec_free (sa->childs[0].tsi);
1677 vec_free (sa->childs[0].tsr);
1678 sa->childs[0].tsi = tsi;
1679 sa->childs[0].tsr = tsr;
1685 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1689 static ikev2_profile_t *
1690 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1691 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1693 ikev2_profile_t *ret = 0, *p;
1694 ikev2_id_t *id_rem, *id_loc;
1695 ikev2_auth_t *sa_auth;
1696 u8 *authmsg, *psk = 0, *auth = 0;
1698 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1700 if (sa->is_initiator)
1704 sa_auth = &sa->r_auth;
1710 sa_auth = &sa->i_auth;
1713 pool_foreach (p, km->profiles)
1715 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1718 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1720 if (!p->auth.data ||
1721 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1724 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1725 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1727 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1729 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1736 ikev2_elog_uint (IKEV2_LOG_ERROR,
1737 "shared key mismatch! ispi %lx", sa->ispi);
1740 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1742 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1745 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1747 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1753 ikev2_elog_uint (IKEV2_LOG_ERROR,
1754 "cert verification failed! ispi %lx", sa->ispi);
1763 ikev2_sa_auth (ikev2_sa_t *sa)
1765 ikev2_main_t *km = &ikev2_main;
1766 ikev2_profile_t *sel_p = 0;
1767 ikev2_sa_transform_t *tr_prf;
1768 u8 *psk, *authmsg, *key_pad;
1771 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1773 /* only shared key and rsa signature */
1774 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1775 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1777 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1779 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1783 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1784 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1788 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1789 sa->udp_encap = sel_p->udp_encap;
1790 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1792 if (!sa->is_initiator)
1794 vec_free (sa->r_id.data);
1795 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1796 sa->r_id.type = sel_p->loc_id.type;
1797 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1798 sa->i_id.type = sel_p->rem_id.type;
1800 /* generate our auth data */
1801 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1802 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1804 vec_free (sa->r_auth.data);
1805 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1806 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1807 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1810 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1812 vec_free (sa->r_auth.data);
1813 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1814 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1818 /* select transforms for 1st child sa */
1819 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1820 sa->childs[0].r_proposals =
1821 ikev2_select_proposal (sa->childs[0].i_proposals,
1822 IKEV2_PROTOCOL_ESP);
1824 if (~0 != sel_p->tun_itf)
1826 sa->is_tun_itf_set = 1;
1827 sa->tun_itf = sel_p->tun_itf;
1833 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1834 "profile found! ispi %lx", sa->ispi);
1835 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1841 ikev2_sa_auth_init (ikev2_sa_t * sa)
1843 ikev2_main_t *km = &ikev2_main;
1844 u8 *authmsg, *key_pad, *psk = 0;
1845 ikev2_sa_transform_t *tr_prf;
1848 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1850 /* only shared key and rsa signature */
1851 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1852 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1854 ikev2_elog_uint (IKEV2_LOG_ERROR,
1855 "unsupported authentication method %u",
1857 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1861 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1863 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1865 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1866 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1867 vec_free (sa->i_auth.data);
1868 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1869 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1873 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1875 vec_free (sa->i_auth.data);
1876 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1877 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1883 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1885 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1889 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1891 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1901 ipsec_sa_flags_t flags;
1904 ipsec_crypto_alg_t encr_type;
1905 ipsec_integ_alg_t integ_type;
1906 ip_address_t local_ip;
1907 ip_address_t remote_ip;
1908 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1910 u32 old_remote_sa_id;
1911 u16 ipsec_over_udp_port;
1914 } ikev2_add_ipsec_tunnel_args_t;
1917 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1919 ikev2_main_t *km = &ikev2_main;
1923 .t_flags = TUNNEL_FLAG_NONE,
1924 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1926 .t_mode = TUNNEL_MODE_P2P,
1929 .t_src = a->remote_ip,
1930 .t_dst = a->local_ip,
1932 tunnel_t tun_out = {
1933 .t_flags = TUNNEL_FLAG_NONE,
1934 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1936 .t_mode = TUNNEL_MODE_P2P,
1939 .t_src = a->local_ip,
1940 .t_dst = a->remote_ip,
1943 if (~0 == a->sw_if_index)
1945 /* no tunnel associated with the SA/profile - create a new one */
1946 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1947 &ip_addr_46 (&a->remote_ip), 0,
1948 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1949 TUNNEL_MODE_P2P, &sw_if_index);
1951 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1953 if (hash_get (km->sw_if_indices, sw_if_index))
1954 /* interface is managed by IKE; proceed with updating SAs */
1957 hash_set1 (km->sw_if_indices, sw_if_index);
1961 sw_if_index = a->sw_if_index;
1962 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1967 ikev2_elog_uint (IKEV2_LOG_ERROR,
1968 "installing ipip tunnel failed! local spi: %x",
1974 vec_add1 (sas_in, a->remote_sa_id);
1977 ipsec_tun_protect_del (sw_if_index, NULL);
1979 /* replace local SA immediately */
1980 ipsec_sa_unlock_id (a->local_sa_id);
1982 /* keep the old sa */
1983 vec_add1 (sas_in, a->old_remote_sa_id);
1986 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1987 a->encr_type, &a->loc_ckey, a->integ_type,
1988 &a->loc_ikey, a->flags, a->salt_local,
1989 a->src_port, a->dst_port, &tun_out, NULL);
1993 rv = ipsec_sa_add_and_lock (
1994 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1995 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1996 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1997 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
2001 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
2008 ipsec_sa_unlock_id (a->remote_sa_id);
2010 ipsec_sa_unlock_id (a->local_sa_id);
2016 ikev2_create_tunnel_interface (vlib_main_t * vm,
2018 ikev2_child_sa_t * child, u32 sa_index,
2019 u32 child_index, u8 is_rekey)
2021 u32 thread_index = vlib_get_thread_index ();
2022 ikev2_main_t *km = &ikev2_main;
2023 ipsec_crypto_alg_t encr_type;
2024 ipsec_integ_alg_t integ_type;
2025 ikev2_profile_t *p = 0;
2026 ikev2_sa_transform_t *tr;
2027 ikev2_sa_proposal_t *proposals;
2029 ikev2_add_ipsec_tunnel_args_t a;
2031 clib_memset (&a, 0, sizeof (a));
2033 if (!child->r_proposals)
2035 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2039 if (sa->is_initiator)
2041 ip_address_copy (&a.local_ip, &sa->iaddr);
2042 ip_address_copy (&a.remote_ip, &sa->raddr);
2043 proposals = child->r_proposals;
2044 a.local_spi = child->r_proposals[0].spi;
2045 a.remote_spi = child->i_proposals[0].spi;
2049 ip_address_copy (&a.local_ip, &sa->raddr);
2050 ip_address_copy (&a.remote_ip, &sa->iaddr);
2051 proposals = child->i_proposals;
2052 a.local_spi = child->i_proposals[0].spi;
2053 a.remote_spi = child->r_proposals[0].spi;
2056 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
2059 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
2060 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2062 if (ikev2_natt_active (sa))
2063 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2064 a.is_rekey = is_rekey;
2066 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2067 if (tr && tr->esn_type)
2068 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2070 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2073 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2075 switch (tr->key_len)
2078 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2081 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2084 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2087 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2092 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2095 switch (tr->key_len)
2098 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2101 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2104 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2107 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2115 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2121 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2124 a.encr_type = encr_type;
2128 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2131 switch (tr->integ_type)
2133 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2134 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2136 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2137 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2139 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2140 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2142 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2143 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2146 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2152 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2158 integ_type = IPSEC_INTEG_ALG_NONE;
2161 a.integ_type = integ_type;
2162 ikev2_calc_child_keys (sa, child);
2164 if (sa->is_initiator)
2166 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2167 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2168 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2169 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2172 a.salt_remote = child->salt_er;
2173 a.salt_local = child->salt_ei;
2175 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2179 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2180 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2181 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2182 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2185 a.salt_remote = child->salt_ei;
2186 a.salt_local = child->salt_er;
2189 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2190 a.src_port = sa->ipsec_over_udp_port;
2193 if (sa->is_initiator && sa->profile_index != ~0)
2194 p = pool_elt_at_index (km->profiles, sa->profile_index);
2196 if (p && p->lifetime)
2198 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2199 if (p->lifetime_jitter)
2201 // This is not much better than rand(3), which Coverity warns
2202 // is unsuitable for security applications; random_u32 is
2203 // however fast. If this perturbance to the expiration time
2204 // needs to use a better RNG then we may need to use something
2205 // like /dev/urandom which has significant overhead.
2206 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2207 rnd = random_u32 (&rnd);
2209 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2213 if (thread_index & 0xffffffc0)
2214 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2216 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2217 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2219 child->local_sa_id =
2221 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2223 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2228 /* create a new remote SA ID to keep the old SA for a bit longer
2229 * so the peer has some time to swap their SAs */
2231 /* use most significat bit of child index part in id */
2233 if (sa->current_remote_id_mask)
2235 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2236 sa->current_remote_id_mask = 0;
2240 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2241 sa->current_remote_id_mask = mask;
2242 remote_sa_id |= mask;
2244 sa->old_id_expiration = 3.0;
2245 sa->old_remote_id_present = 1;
2248 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2250 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2251 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2253 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2254 (u8 *) & a, sizeof (a));
2260 ip46_address_t local_ip;
2261 ip46_address_t remote_ip;
2265 } ikev2_del_ipsec_tunnel_args_t;
2268 ikev2_flip_alternate_sa_bit (u32 id)
2277 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2279 ikev2_main_t *km = &ikev2_main;
2280 ipip_tunnel_t *ipip = NULL;
2283 if (~0 == a->sw_if_index)
2286 ipip_tunnel_key_t key = {
2288 .dst = a->remote_ip,
2289 .transport = IPIP_TRANSPORT_IP4,
2294 ipip = ipip_tunnel_db_find (&key);
2298 sw_if_index = ipip->sw_if_index;
2299 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2306 sw_if_index = a->sw_if_index;
2307 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2310 if (~0 != sw_if_index)
2311 ipsec_tun_protect_del (sw_if_index, NULL);
2313 ipsec_sa_unlock_id (a->remote_sa_id);
2314 ipsec_sa_unlock_id (a->local_sa_id);
2315 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2318 ipip_del_tunnel (ipip->sw_if_index);
2322 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2323 ikev2_child_sa_t * child)
2325 ikev2_del_ipsec_tunnel_args_t a;
2327 clib_memset (&a, 0, sizeof (a));
2329 if (sa->is_initiator)
2331 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2332 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2336 ip_address_to_46 (&sa->raddr, &a.local_ip);
2337 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2340 a.remote_sa_id = child->remote_sa_id;
2341 a.local_sa_id = child->local_sa_id;
2342 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2344 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2350 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2351 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2353 ikev2_main_t *km = &ikev2_main;
2354 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2356 ike_payload_header_t *ph;
2360 ikev2_sa_transform_t *tr_encr, *tr_integ;
2362 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2364 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2366 ikev2_payload_chain_t *chain = 0;
2367 ikev2_payload_new_chain (chain);
2369 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2371 if (sa->r_proposals == 0)
2373 ikev2_payload_add_notify (chain,
2374 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2375 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2377 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2379 u8 *data = vec_new (u8, 2);
2380 ikev2_sa_transform_t *tr_dh;
2382 ikev2_sa_get_td_for_type (sa->r_proposals,
2383 IKEV2_TRANSFORM_TYPE_DH);
2384 ASSERT (tr_dh && tr_dh->dh_type);
2386 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2387 data[1] = (tr_dh->dh_type) & 0xff;
2389 ikev2_payload_add_notify (chain,
2390 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2393 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2395 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2397 u8 *data = vec_new (u8, 1);
2399 data[0] = sa->unsupported_cp;
2400 ikev2_payload_add_notify (chain,
2401 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2409 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2410 ikev2_payload_add_sa (chain, sa->r_proposals);
2411 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2412 ikev2_payload_add_nonce (chain, sa->r_nonce);
2414 u8 *nat_detection_sha1 =
2415 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2416 clib_host_to_net_u64 (sa->rspi),
2417 &sa->raddr, udp->dst_port);
2418 ikev2_payload_add_notify (chain,
2419 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2420 nat_detection_sha1);
2421 vec_free (nat_detection_sha1);
2422 nat_detection_sha1 =
2423 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2424 clib_host_to_net_u64 (sa->rspi),
2425 &sa->iaddr, udp->src_port);
2426 ikev2_payload_add_notify (chain,
2427 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2428 nat_detection_sha1);
2429 vec_free (nat_detection_sha1);
2432 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2434 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2436 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2437 ikev2_payload_add_auth (chain, &sa->r_auth);
2438 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2439 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2440 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2442 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2444 ikev2_payload_add_notify (chain,
2445 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2447 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2449 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2451 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2453 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2454 ikev2_payload_add_auth (chain, &sa->r_auth);
2456 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2458 ikev2_payload_add_notify (chain,
2459 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2460 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2461 ikev2_payload_add_auth (chain, &sa->r_auth);
2462 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2463 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2465 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2467 u8 *data = vec_new (u8, 1);
2469 data[0] = sa->unsupported_cp;
2470 ikev2_payload_add_notify (chain,
2471 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2475 else if (sa->state == IKEV2_STATE_SA_INIT)
2477 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2478 /* IDr is optional when sending INIT from the initiator */
2479 ASSERT (sa->r_id.type != 0 || sa->is_initiator);
2480 if (sa->r_id.type != 0)
2481 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2482 ikev2_payload_add_auth (chain, &sa->i_auth);
2483 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2484 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2485 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2486 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2491 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2495 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2497 /* if pending delete */
2500 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2502 if (ike_hdr_is_request (ike))
2503 ikev2_payload_add_delete (chain, sa->del);
2505 /* The response to a request that deletes the IKE SA is an empty
2506 INFORMATIONAL response. */
2507 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2509 /* The response to a request that deletes ESP or AH SAs will contain
2510 delete payloads for the paired SAs going in the other direction. */
2513 ikev2_payload_add_delete (chain, sa->del);
2518 /* received N(AUTHENTICATION_FAILED) */
2519 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2521 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2524 /* received unsupported critical payload */
2525 else if (sa->unsupported_cp)
2527 u8 *data = vec_new (u8, 1);
2529 data[0] = sa->unsupported_cp;
2530 ikev2_payload_add_notify (chain,
2531 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2534 sa->unsupported_cp = 0;
2537 /* else send empty response */
2539 if (ike_hdr_is_response (ike))
2541 ASSERT (stats != 0);
2542 stats->n_keepalives++;
2543 sa->stats.n_keepalives++;
2547 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2549 if (sa->is_initiator)
2552 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2553 ikev2_notify_t notify;
2554 u8 *data = vec_new (u8, 4);
2555 clib_memset (¬ify, 0, sizeof (notify));
2556 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2557 notify.spi = sa->childs[0].i_proposals->spi;
2558 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2560 ikev2_payload_add_sa (chain, proposals);
2561 ikev2_payload_add_nonce (chain, sa->i_nonce);
2562 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2563 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2564 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2569 else if (vec_len (sa->rekey) > 0)
2571 if (sa->rekey[0].notify_type)
2572 ikev2_payload_add_notify (chain, sa->rekey[0].notify_type, 0);
2575 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2576 ikev2_payload_add_nonce (chain, sa->r_nonce);
2577 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2579 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2582 vec_del1 (sa->rekey, 0);
2584 else if (vec_len (sa->new_child) > 0)
2586 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2587 ikev2_payload_add_nonce (chain, sa->r_nonce);
2588 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2590 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2592 vec_del1 (sa->new_child, 0);
2594 else if (sa->unsupported_cp)
2596 u8 *data = vec_new (u8, 1);
2598 data[0] = sa->unsupported_cp;
2599 ikev2_payload_add_notify (
2600 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2602 sa->unsupported_cp = 0;
2606 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2612 ike->version = IKE_VERSION_2;
2613 ike->nextpayload = IKEV2_PAYLOAD_SK;
2614 tlen = sizeof (*ike);
2616 if (sa->is_initiator)
2617 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2619 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2621 tlen += vec_len (chain->data);
2622 ike->nextpayload = chain->first_payload_type;
2623 ike->length = clib_host_to_net_u32 (tlen);
2625 if (tlen + b->current_length + b->current_data > buffer_data_size)
2631 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2633 /* store whole IKE payload - needed for PSK auth */
2634 vec_reset_length (sa->last_sa_init_res_packet_data);
2635 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2639 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2640 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2643 plen = sizeof (*ph);
2644 ph = (ike_payload_header_t *) & ike->payload[0];
2645 ph->nextpayload = chain->first_payload_type;
2648 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2649 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2650 plen += vec_len (chain->data) + iv_len;
2652 /* add space for hmac/tag */
2654 plen += tr_integ->key_trunc;
2656 plen += IKEV2_GCM_ICV_SIZE;
2659 if (tlen + b->current_length + b->current_data > buffer_data_size)
2665 /* payload and total length */
2666 ph->length = clib_host_to_net_u16 (plen);
2667 ike->length = clib_host_to_net_u32 (tlen);
2671 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2672 ph->payload, (u8 *) ike,
2673 sizeof (*ike) + sizeof (*ph),
2674 ph->payload + plen - sizeof (*ph) -
2675 IKEV2_GCM_ICV_SIZE))
2683 if (!ikev2_encrypt_data
2684 (ptd, sa, tr_encr, chain->data, ph->payload))
2690 ikev2_calc_integr (tr_integ,
2691 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2692 (u8 *) ike, tlen - tr_integ->key_trunc);
2693 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2694 sizeof (*ike), integ, tr_integ->key_trunc);
2697 /* store whole IKE payload - needed for retransmit */
2698 vec_reset_length (sa->last_res_packet_data);
2699 vec_add (sa->last_res_packet_data, ike, tlen);
2703 ikev2_payload_destroy_chain (chain);
2709 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2710 ip_address_t iaddr, ip_address_t raddr,
2715 u8 payload = ike->nextpayload;
2717 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2718 ip_address_cmp (&sa->iaddr, &iaddr) ||
2719 ip_address_cmp (&sa->raddr, &raddr))
2724 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2726 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2727 u32 plen = clib_net_to_host_u16 (ikep->length);
2729 if (plen < sizeof (ike_payload_header_t))
2732 if (payload == IKEV2_PAYLOAD_NONCE &&
2733 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2735 /* req is retransmit */
2736 if (sa->state == IKEV2_STATE_SA_INIT)
2738 sa->stats.n_init_retransmit++;
2739 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2740 u32 slen = clib_net_to_host_u32 (tmp->length);
2741 ike->ispi = tmp->ispi;
2742 ike->rspi = tmp->rspi;
2743 ike->nextpayload = tmp->nextpayload;
2744 ike->version = tmp->version;
2745 ike->exchange = tmp->exchange;
2746 ike->flags = tmp->flags;
2747 ike->msgid = tmp->msgid;
2748 ike->length = tmp->length;
2749 clib_memcpy_fast (ike->payload, tmp->payload,
2750 slen - sizeof (*ike));
2751 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2752 "ispi %lx IKE_SA_INIT retransmit "
2753 "from %d.%d.%d.%d to %d.%d.%d.%d",
2755 ip_addr_v4 (&raddr).as_u32,
2756 ip_addr_v4 (&iaddr).as_u32);
2759 /* else ignore req */
2762 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2763 "ispi %lx IKE_SA_INIT ignore "
2764 "from %d.%d.%d.%d to %d.%d.%d.%d",
2766 ip_addr_v4 (&raddr).as_u32,
2767 ip_addr_v4 (&iaddr).as_u32);
2771 payload = ikep->nextpayload;
2779 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2780 ip_address_t raddr, u32 rlen)
2784 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2787 pool_foreach (sa, ptd->sas) {
2788 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2794 /* req is not retransmit */
2799 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2801 if (ike_hdr_is_response (ike))
2804 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2807 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2809 sa->last_msg_id = msg_id;
2813 /* retransmitted req */
2814 if (msg_id == sa->last_msg_id)
2816 sa->stats.n_retransmit++;
2817 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2818 u32 slen = clib_net_to_host_u32 (tmp->length);
2819 ike->ispi = tmp->ispi;
2820 ike->rspi = tmp->rspi;
2821 ike->nextpayload = tmp->nextpayload;
2822 ike->version = tmp->version;
2823 ike->exchange = tmp->exchange;
2824 ike->flags = tmp->flags;
2825 ike->msgid = tmp->msgid;
2826 ike->length = tmp->length;
2827 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2828 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2829 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2830 ip_addr_v4 (&sa->iaddr).as_u32);
2834 /* old req ignore */
2835 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2836 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2837 ip_addr_v4 (&sa->iaddr).as_u32);
2842 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2844 ikev2_main_t *km = &ikev2_main;
2845 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2846 sa->profile_index = ~0;
2850 ikev2_del_sa_init_from_main (u64 * ispi)
2852 ikev2_main_t *km = &ikev2_main;
2853 uword *p = hash_get (km->sa_by_ispi, *ispi);
2856 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2857 hash_unset (km->sa_by_ispi, sai->ispi);
2858 ikev2_sa_free_all_vec (sai);
2859 pool_put (km->sais, sai);
2864 ikev2_del_sa_init (u64 ispi)
2866 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2871 ikev2_rewrite_v6_addrs (ikev2_sa_t *sa, ip6_header_t *ih)
2873 if (sa->is_initiator)
2875 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2876 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2880 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2881 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2886 ikev2_rewrite_v4_addrs (ikev2_sa_t *sa, ip4_header_t *ih)
2888 if (sa->is_initiator)
2890 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2891 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2895 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2896 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2901 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2902 const ip_address_family_t af)
2904 ip_address_set (&sa->raddr, raddr, af);
2905 ip_address_set (&sa->iaddr, iaddr, af);
2909 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2910 ip6_header_t * ip6, u8 is_ip4)
2915 src = ip4->src_address.as_u32;
2916 dst = ip4->dst_address.as_u32;
2920 src = ip6->src_address.as_u32[3];
2921 dst = ip6->dst_address.as_u32[3];
2923 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2924 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2925 exchange, src, dst);
2929 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2931 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2933 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2936 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2937 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2938 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2939 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2943 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2945 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2947 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2949 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2951 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2956 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2957 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2959 u32 n_left = frame->n_vectors, *from;
2960 ikev2_main_t *km = &ikev2_main;
2961 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2962 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2963 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2964 ikev2_stats_t _stats, *stats = &_stats;
2967 /* no NAT traversal for ip6 */
2968 ASSERT (!natt || is_ip4);
2970 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2971 from = vlib_frame_vector_args (frame);
2972 vlib_get_buffers (vm, from, bufs, n_left);
2977 vlib_buffer_t *b0 = b[0];
2978 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2979 : IKEV2_NEXT_IP6_ERROR_DROP;
2980 ip4_header_t *ip40 = 0;
2981 ip6_header_t *ip60 = 0;
2984 ikev2_sa_t *sa0 = 0;
2985 ikev2_sa_t sa; /* temporary store for SA */
2992 u8 *ptr = vlib_buffer_get_current (b0);
2993 ip40 = (ip4_header_t *) ptr;
2994 ptr += sizeof (*ip40);
2995 udp0 = (udp_header_t *) ptr;
2996 ptr += sizeof (*udp0);
2997 ike0 = (ike_header_t *) ptr;
2998 ip_hdr_sz = sizeof (*ip40);
3002 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
3003 ike0 = vlib_buffer_get_current (b0);
3004 vlib_buffer_advance (b0, -sizeof (*udp0));
3005 udp0 = vlib_buffer_get_current (b0);
3009 ip40 = (ip4_header_t *) ipx_hdr;
3010 ip_hdr_sz = sizeof (*ip40);
3014 ip60 = (ip6_header_t *) ipx_hdr;
3015 ip_hdr_sz = sizeof (*ip60);
3017 vlib_buffer_advance (b0, -ip_hdr_sz);
3020 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
3022 /* check for non-esp marker */
3025 ASSERT (*((u32 *) ike0) == 0);
3027 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
3028 rlen -= sizeof (ikev2_non_esp_marker);
3031 if (clib_net_to_host_u32 (ike0->length) != rlen)
3033 vlib_node_increment_counter (vm, node->node_index,
3034 IKEV2_ERROR_BAD_LENGTH, 1);
3038 if (ike0->version != IKE_VERSION_2)
3040 vlib_node_increment_counter (vm, node->node_index,
3041 IKEV2_ERROR_NOT_IKEV2, 1);
3045 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
3048 clib_memset (sa0, 0, sizeof (*sa0));
3050 if (ike_hdr_is_initiator (ike0))
3052 sa0->stats.n_sa_init_req++;
3053 stats->n_sa_init_req++;
3054 if (ike0->rspi == 0)
3057 ikev2_set_ip_address (sa0, &ip40->src_address,
3058 &ip40->dst_address, AF_IP4);
3060 ikev2_set_ip_address (sa0, &ip60->src_address,
3061 &ip60->dst_address, AF_IP6);
3063 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3066 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
3070 vlib_node_increment_counter (vm, node->node_index,
3073 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3075 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3080 res = ikev2_process_sa_init_req (
3081 vm, sa0, ike0, udp0, rlen,
3082 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3084 vlib_node_increment_counter (vm, node->node_index,
3085 IKEV2_ERROR_MALFORMED_PACKET,
3088 if (sa0->state == IKEV2_STATE_SA_INIT)
3090 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3092 ikev2_select_proposal (sa0->i_proposals,
3093 IKEV2_PROTOCOL_IKE);
3094 ikev2_generate_sa_init_data_and_log (sa0);
3097 if (sa0->state == IKEV2_STATE_SA_INIT
3098 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3100 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3102 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3104 vlib_node_increment_counter (vm, node->node_index,
3105 IKEV2_ERROR_NO_BUFF_SPACE,
3109 if (sa0->state == IKEV2_STATE_SA_INIT)
3111 /* add SA to the pool */
3112 pool_get (ptd->sas, sa0);
3113 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3114 ikev2_init_sa (vm, sa0);
3115 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3119 ikev2_sa_free_all_vec (sa0);
3123 else //received sa_init without initiator flag
3126 ikev2_set_ip_address (sa0, &ip40->dst_address,
3127 &ip40->src_address, AF_IP4);
3129 ikev2_set_ip_address (sa0, &ip60->dst_address,
3130 &ip60->src_address, AF_IP6);
3132 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3134 if (sa0->state == IKEV2_STATE_SA_INIT)
3137 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3138 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3141 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3143 if (clib_atomic_bool_cmp_and_swap
3144 (&sai->init_response_received, 0, 1))
3146 ikev2_complete_sa_data (sa0, sai);
3147 ikev2_calc_keys (sa0);
3148 ikev2_sa_auth_init (sa0);
3149 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3151 clib_net_to_host_u32 (sai->last_init_msg_id);
3152 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3153 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3156 vlib_node_increment_counter (vm,
3158 IKEV2_ERROR_NO_BUFF_SPACE,
3163 /* we've already processed sa-init response */
3164 sa0->state = IKEV2_STATE_UNKNOWN;
3169 if (sa0->state == IKEV2_STATE_SA_INIT)
3171 /* add SA to the pool */
3172 pool_get (ptd->sas, sa0);
3173 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3174 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3178 ikev2_sa_free_all_vec (sa0);
3182 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3185 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3188 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3189 slen = ikev2_retransmit_resp (sa0, ike0);
3192 vlib_node_increment_counter (vm, node->node_index,
3195 IKEV2_ERROR_IKE_REQ_IGNORE
3197 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3202 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3203 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3205 ikev2_sa_auth (sa0);
3207 vlib_node_increment_counter (vm, node->node_index,
3208 IKEV2_ERROR_MALFORMED_PACKET, 1);
3209 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3211 ikev2_initial_contact_cleanup (ptd, sa0);
3212 ikev2_sa_match_ts (sa0);
3213 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3214 ikev2_create_tunnel_interface (vm, sa0,
3219 if (sa0->is_initiator)
3221 sa0->last_msg_id = ~0;
3222 ikev2_del_sa_init (sa0->ispi);
3226 sa0->stats.n_sa_auth_req++;
3227 stats->n_sa_auth_req++;
3228 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3230 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3232 vlib_node_increment_counter (vm, node->node_index,
3233 IKEV2_ERROR_NO_BUFF_SPACE,
3238 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3241 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3244 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3245 slen = ikev2_retransmit_resp (sa0, ike0);
3248 vlib_node_increment_counter (vm, node->node_index,
3251 IKEV2_ERROR_IKE_REQ_IGNORE
3253 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3258 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3261 vlib_node_increment_counter (vm, node->node_index,
3262 IKEV2_ERROR_MALFORMED_PACKET,
3270 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3272 ikev2_delete_t *d, *tmp, *resp = 0;
3273 vec_foreach (d, sa0->del)
3275 ikev2_child_sa_t *ch_sa;
3276 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3278 !sa0->is_initiator);
3281 ikev2_delete_tunnel_interface (km->vnet_main,
3283 if (!sa0->is_initiator)
3285 vec_add2 (resp, tmp, 1);
3286 tmp->protocol_id = d->protocol_id;
3287 tmp->spi = ch_sa->r_proposals[0].spi;
3289 ikev2_sa_del_child_sa (sa0, ch_sa);
3292 if (!sa0->is_initiator)
3294 vec_free (sa0->del);
3299 if (ike_hdr_is_request (ike0))
3301 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3303 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3305 vlib_node_increment_counter (vm, node->node_index,
3306 IKEV2_ERROR_NO_BUFF_SPACE,
3311 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3314 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3317 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3318 slen = ikev2_retransmit_resp (sa0, ike0);
3321 vlib_node_increment_counter (vm, node->node_index,
3324 IKEV2_ERROR_IKE_REQ_IGNORE
3326 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3331 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3334 vlib_node_increment_counter (vm, node->node_index,
3335 IKEV2_ERROR_MALFORMED_PACKET,
3343 if (!sa0->rekey[0].notify_type &&
3344 sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3347 ikev2_sa_free_all_child_sa (&sa0->childs);
3348 ikev2_child_sa_t *child;
3349 vec_add2 (sa0->childs, child, 1);
3350 clib_memset (child, 0, sizeof (*child));
3351 child->r_proposals = sa0->rekey[0].r_proposal;
3352 child->i_proposals = sa0->rekey[0].i_proposal;
3353 child->tsi = sa0->rekey[0].tsi;
3354 child->tsr = sa0->rekey[0].tsr;
3355 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3356 child - sa0->childs, 1);
3358 if (ike_hdr_is_response (ike0))
3360 vec_free (sa0->rekey);
3364 stats->n_rekey_req++;
3365 sa0->stats.n_rekey_req++;
3366 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3368 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3370 vlib_node_increment_counter (vm, node->node_index,
3371 IKEV2_ERROR_NO_BUFF_SPACE,
3375 else if (sa0->new_child)
3377 ikev2_child_sa_t *c;
3378 vec_add2 (sa0->childs, c, 1);
3379 memset (c, 0, sizeof (*c));
3380 c->r_proposals = sa0->new_child[0].r_proposal;
3381 c->i_proposals = sa0->new_child[0].i_proposal;
3382 c->tsi = sa0->new_child[0].tsi;
3383 c->tsr = sa0->new_child[0].tsr;
3384 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3385 c - sa0->childs, 0);
3386 if (ike_hdr_is_request (ike0))
3388 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3390 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3392 vlib_node_increment_counter (
3393 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3400 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3404 /* if we are sending packet back, rewrite headers */
3405 if (slen && ~0 != slen)
3409 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3410 ikev2_rewrite_v4_addrs (sa0, ip40);
3414 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3415 ikev2_rewrite_v6_addrs (sa0, ip60);
3420 udp0->dst_port = udp0->src_port =
3421 clib_net_to_host_u16 (ikev2_get_port (sa0));
3423 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3424 && ikev2_natt_active (sa0))
3427 slen = ikev2_insert_non_esp_marker (ike0, slen);
3433 slen += sizeof (ikev2_non_esp_marker);
3435 u16 tp = udp0->dst_port;
3436 udp0->dst_port = udp0->src_port;
3437 udp0->src_port = tp;
3440 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3442 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3445 ip40->length = clib_host_to_net_u16 (b0->current_length);
3446 ip40->checksum = ip4_header_checksum (ip40);
3450 ip60->payload_length =
3451 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3455 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3456 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3458 ikev2_child_sa_t *c;
3460 vec_foreach (c, sa0->childs)
3461 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3463 ikev2_delete_sa (ptd, sa0);
3465 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3466 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3469 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3470 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3471 t->next_index = next[0];
3478 ikev2_update_stats (vm, node->node_index, stats);
3479 vlib_node_increment_counter (vm, node->node_index,
3480 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3481 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3482 return frame->n_vectors;
3486 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3488 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3492 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3493 vlib_frame_t *frame)
3495 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3499 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3501 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3505 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3506 .function = ikev2_ip4,
3507 .name = "ikev2-ip4",
3508 .vector_size = sizeof (u32),
3509 .format_trace = format_ikev2_trace,
3510 .type = VLIB_NODE_TYPE_INTERNAL,
3512 .n_errors = IKEV2_N_ERROR,
3513 .error_counters = ikev2_error_counters,
3515 .n_next_nodes = IKEV2_IP4_N_NEXT,
3517 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3518 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3522 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3523 .function = ikev2_ip4_natt,
3524 .name = "ikev2-ip4-natt",
3525 .vector_size = sizeof (u32),
3526 .format_trace = format_ikev2_trace,
3527 .type = VLIB_NODE_TYPE_INTERNAL,
3529 .n_errors = IKEV2_N_ERROR,
3530 .error_counters = ikev2_error_counters,
3532 .n_next_nodes = IKEV2_IP4_N_NEXT,
3534 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3535 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3539 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3540 .function = ikev2_ip6,
3541 .name = "ikev2-ip6",
3542 .vector_size = sizeof (u32),
3543 .format_trace = format_ikev2_trace,
3544 .type = VLIB_NODE_TYPE_INTERNAL,
3546 .n_errors = IKEV2_N_ERROR,
3547 .error_counters = ikev2_error_counters,
3549 .n_next_nodes = IKEV2_IP6_N_NEXT,
3551 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3552 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3557 // set ikev2 proposals when vpp is used as initiator
3558 static clib_error_t *
3559 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3560 ikev2_transforms_set * ts,
3561 ikev2_sa_proposal_t ** proposals, int is_ike)
3564 ikev2_main_t *km = &ikev2_main;
3565 ikev2_sa_proposal_t *proposal;
3566 vec_add2 (*proposals, proposal, 1);
3567 ikev2_sa_transform_t *td;
3572 vec_foreach (td, km->supported_transforms)
3574 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3575 && td->encr_type == ts->crypto_alg
3576 && td->key_len == ts->crypto_key_size / 8)
3579 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3580 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3581 vec_add (td->attrs, (u8 *) attr, 4);
3582 vec_add1 (proposal->transforms, *td);
3591 r = clib_error_return (0, "Unsupported algorithm");
3595 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3599 vec_foreach (td, km->supported_transforms)
3601 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3602 && td->integ_type == ts->integ_alg)
3604 vec_add1 (proposal->transforms, *td);
3612 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3613 r = clib_error_return (0, "Unsupported algorithm");
3622 vec_foreach (td, km->supported_transforms)
3624 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3625 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3627 vec_add1 (proposal->transforms, *td);
3634 r = clib_error_return (0, "Unsupported algorithm");
3643 vec_foreach (td, km->supported_transforms)
3645 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3647 vec_add1 (proposal->transforms, *td);
3650 sa->dh_group = td->dh_type;
3658 r = clib_error_return (0, "Unsupported algorithm");
3666 vec_foreach (td, km->supported_transforms)
3668 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3670 vec_add1 (proposal->transforms, *td);
3676 r = clib_error_return (0, "Unsupported algorithm");
3685 static ikev2_profile_t *
3686 ikev2_profile_index_by_name (u8 * name)
3688 ikev2_main_t *km = &ikev2_main;
3691 p = mhash_get (&km->profile_index_by_name, name);
3695 return pool_elt_at_index (km->profiles, p[0]);
3700 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3701 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3710 b0 = vlib_get_buffer (vm, bi0);
3711 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3712 udp0 = vlib_buffer_get_current (b0);
3713 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3714 udp0->src_port = clib_host_to_net_u16 (src_port);
3715 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3718 if (ip_addr_version (dst) == AF_IP4)
3720 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3721 ip40 = vlib_buffer_get_current (b0);
3722 ip40->ip_version_and_header_length = 0x45;
3724 ip40->fragment_id = 0;
3725 ip40->flags_and_fragment_offset = 0;
3727 ip40->protocol = IP_PROTOCOL_UDP;
3728 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3729 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3730 b0->current_length =
3731 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3732 ip40->length = clib_host_to_net_u16 (b0->current_length);
3733 ip40->checksum = ip4_header_checksum (ip40);
3737 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3738 ip60 = vlib_buffer_get_current (b0);
3740 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3741 ip60->ip_version_traffic_class_and_flow_label =
3742 clib_host_to_net_u32 (0x6 << 28);
3743 ip60->payload_length =
3744 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3745 ip60->protocol = IP_PROTOCOL_UDP;
3746 ip60->hop_limit = 0xff;
3747 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3748 sizeof (ip60->src_address));
3749 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3750 sizeof (ip60->src_address));
3753 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3754 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3755 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3757 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3758 ip4_lookup_node.index : ip6_lookup_node.index;
3760 /* send the request */
3761 f = vlib_get_frame_to_node (vm, next_index);
3762 to_next = vlib_frame_vector_args (f);
3765 vlib_put_frame_to_node (vm, next_index, f);
3770 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3773 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3778 *b = vlib_get_buffer (vm, bi0);
3783 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3785 ikev2_main_t *km = &ikev2_main;
3788 EVP_PKEY_free (km->pkey);
3789 km->pkey = ikev2_load_key_file (file);
3790 if (km->pkey == NULL)
3791 return clib_error_return (0, "load key '%s' failed", file);
3796 static vnet_api_error_t
3797 ikev2_register_udp_port (ikev2_profile_t *p, u16 port)
3799 ipsec_register_udp_port (port);
3800 p->ipsec_over_udp_port = port;
3805 ikev2_unregister_udp_port (ikev2_profile_t *p)
3807 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3810 ipsec_unregister_udp_port (p->ipsec_over_udp_port);
3811 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3815 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3816 ikev2_main_per_thread_data_t * tkm,
3817 ikev2_sa_t * sa, u8 send_notification)
3819 ikev2_main_t *km = &ikev2_main;
3820 ip_address_t *src, *dst;
3822 ikev2_child_sa_t *c;
3824 /* Create the Initiator notification for IKE SA removal */
3829 vec_resize (sa->del, 1);
3830 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3831 sa->del->spi = sa->ispi;
3833 if (send_notification)
3835 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3838 ikev2_log_error ("buffer alloc failure");
3842 ike0 = vlib_buffer_get_current (b0);
3843 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3844 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3845 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3847 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3848 sa->last_init_msg_id += 1;
3849 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3853 if (ikev2_natt_active (sa))
3854 len = ikev2_insert_non_esp_marker (ike0, len);
3856 if (sa->is_initiator)
3867 ikev2_send_ike (vm, src, dst, bi0, len,
3868 ikev2_get_port (sa), sa->dst_port, 0);
3872 /* delete local SA */
3873 vec_foreach (c, sa->childs)
3874 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3876 u64 rspi = sa->rspi;
3877 ikev2_sa_free_all_vec (sa);
3878 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3881 hash_unset (tkm->sa_by_rspi, rspi);
3882 pool_put (tkm->sas, sa);
3887 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3889 ikev2_main_per_thread_data_t *tkm;
3891 u32 pi = p - km->profiles;
3896 pool_foreach (sa, km->sais) {
3897 if (pi == sa->profile_index)
3898 vec_add1 (del_sai, sa - km->sais);
3902 vec_foreach (sai, del_sai)
3904 sa = pool_elt_at_index (km->sais, sai[0]);
3905 ikev2_sa_free_all_vec (sa);
3906 hash_unset (km->sa_by_ispi, sa->ispi);
3907 pool_put (km->sais, sa);
3909 vec_reset_length (del_sai);
3911 vec_foreach (tkm, km->per_thread_data)
3914 pool_foreach (sa, tkm->sas) {
3915 if (sa->profile_index != ~0 && pi == sa->profile_index)
3916 vec_add1 (del_sai, sa - tkm->sas);
3920 vec_foreach (sai, del_sai)
3922 sa = pool_elt_at_index (tkm->sas, sai[0]);
3923 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3926 vec_reset_length (del_sai);
3933 ikev2_profile_responder_free (ikev2_responder_t *r)
3935 vec_free (r->hostname);
3939 ikev2_profile_free (ikev2_profile_t * p)
3943 vec_free (p->auth.data);
3945 EVP_PKEY_free (p->auth.key);
3947 ikev2_profile_responder_free (&p->responder);
3949 vec_free (p->loc_id.data);
3950 vec_free (p->rem_id.data);
3954 ikev2_bind (vlib_main_t *vm, ikev2_main_t *km)
3956 if (0 == km->bind_refcount)
3958 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
3959 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
3960 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
3961 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
3963 vlib_punt_register (km->punt_hdl,
3964 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3968 km->bind_refcount++;
3972 ikev2_unbind (vlib_main_t *vm, ikev2_main_t *km)
3974 km->bind_refcount--;
3975 if (0 == km->bind_refcount)
3977 vlib_punt_unregister (km->punt_hdl,
3978 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
3981 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 0);
3982 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 1);
3983 udp_unregister_dst_port (vm, IKEV2_PORT, 0);
3984 udp_unregister_dst_port (vm, IKEV2_PORT, 1);
3988 static void ikev2_lazy_init (ikev2_main_t *km);
3991 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3993 ikev2_main_t *km = &ikev2_main;
3996 ikev2_lazy_init (km);
4000 if (ikev2_profile_index_by_name (name))
4001 return clib_error_return (0, "policy %v already exists", name);
4003 pool_get (km->profiles, p);
4004 clib_memset (p, 0, sizeof (*p));
4005 p->name = vec_dup (name);
4006 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
4007 p->responder.sw_if_index = ~0;
4009 uword index = p - km->profiles;
4010 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
4012 ikev2_bind (vm, km);
4016 p = ikev2_profile_index_by_name (name);
4018 return clib_error_return (0, "policy %v does not exists", name);
4020 ikev2_unbind (vm, km);
4022 ikev2_unregister_udp_port (p);
4023 ikev2_cleanup_profile_sessions (km, p);
4025 ikev2_profile_free (p);
4026 pool_put (km->profiles, p);
4027 mhash_unset (&km->profile_index_by_name, name, 0);
4033 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
4034 u8 * auth_data, u8 data_hex_format)
4039 p = ikev2_profile_index_by_name (name);
4043 r = clib_error_return (0, "unknown profile %v", name);
4048 EVP_PKEY_free (p->auth.key);
4049 vec_free (p->auth.data);
4051 p->auth.method = auth_method;
4052 p->auth.data = vec_dup (auth_data);
4053 p->auth.hex = data_hex_format;
4055 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
4057 vec_add1 (p->auth.data, 0);
4058 p->auth.key = ikev2_load_cert_file (p->auth.data);
4059 if (p->auth.key == NULL)
4060 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
4067 ikev2_is_id_supported (u8 id_type)
4069 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
4070 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
4071 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
4072 id_type == IKEV2_ID_TYPE_ID_FQDN);
4076 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
4082 if (!ikev2_is_id_supported (id_type))
4084 r = clib_error_return (0, "unsupported identity type %U",
4085 format_ikev2_id_type, id_type);
4089 p = ikev2_profile_index_by_name (name);
4093 r = clib_error_return (0, "unknown profile %v", name);
4099 vec_free (p->loc_id.data);
4100 p->loc_id.type = id_type;
4101 p->loc_id.data = vec_dup (data);
4105 vec_free (p->rem_id.data);
4106 p->rem_id.type = id_type;
4107 p->rem_id.data = vec_dup (data);
4114 ikev2_set_ts_type (ikev2_ts_t *ts, const ip_address_t *addr)
4116 if (ip_addr_version (addr) == AF_IP4)
4117 ts->ts_type = TS_IPV4_ADDR_RANGE;
4119 ts->ts_type = TS_IPV6_ADDR_RANGE;
4123 ikev2_set_ts_addrs (ikev2_ts_t *ts, const ip_address_t *start,
4124 const ip_address_t *end)
4126 ip_address_copy (&ts->start_addr, start);
4127 ip_address_copy (&ts->end_addr, end);
4131 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4132 u16 start_port, u16 end_port, ip_address_t start_addr,
4133 ip_address_t end_addr, int is_local)
4138 p = ikev2_profile_index_by_name (name);
4142 r = clib_error_return (0, "unknown profile %v", name);
4146 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4147 return clib_error_return (0, "IP address version mismatch!");
4151 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4152 p->loc_ts.start_port = start_port;
4153 p->loc_ts.end_port = end_port;
4154 p->loc_ts.protocol_id = protocol_id;
4155 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4159 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4160 p->rem_ts.start_port = start_port;
4161 p->rem_ts.end_port = end_port;
4162 p->rem_ts.protocol_id = protocol_id;
4163 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4170 ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname,
4176 p = ikev2_profile_index_by_name (name);
4180 r = clib_error_return (0, "unknown profile %v", name);
4184 p->responder.is_resolved = 0;
4185 p->responder.sw_if_index = sw_if_index;
4186 p->responder.hostname = vec_dup (hostname);
4192 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4193 u32 sw_if_index, ip_address_t addr)
4198 p = ikev2_profile_index_by_name (name);
4202 r = clib_error_return (0, "unknown profile %v", name);
4206 p->responder.is_resolved = 1;
4207 p->responder.sw_if_index = sw_if_index;
4208 ip_address_copy (&p->responder.addr, &addr);
4214 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4215 ikev2_transform_encr_type_t crypto_alg,
4216 ikev2_transform_integ_type_t integ_alg,
4217 ikev2_transform_dh_type_t dh_type,
4218 u32 crypto_key_size)
4222 p = ikev2_profile_index_by_name (name);
4224 return clib_error_return (0, "unknown profile %v", name);
4226 if ((IKEV2_TRANSFORM_INTEG_TYPE_NONE != integ_alg) +
4227 (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 == crypto_alg) !=
4229 return clib_error_return (0, "invalid cipher + integrity algorithm");
4231 p->ike_ts.crypto_alg = crypto_alg;
4232 p->ike_ts.integ_alg = integ_alg;
4233 p->ike_ts.dh_type = dh_type;
4234 p->ike_ts.crypto_key_size = crypto_key_size;
4239 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4240 ikev2_transform_encr_type_t crypto_alg,
4241 ikev2_transform_integ_type_t integ_alg,
4242 u32 crypto_key_size)
4247 p = ikev2_profile_index_by_name (name);
4251 r = clib_error_return (0, "unknown profile %v", name);
4255 p->esp_ts.crypto_alg = crypto_alg;
4256 p->esp_ts.integ_alg = integ_alg;
4257 p->esp_ts.crypto_key_size = crypto_key_size;
4262 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4263 u8 * name, u32 sw_if_index)
4268 p = ikev2_profile_index_by_name (name);
4272 r = clib_error_return (0, "unknown profile %v", name);
4276 p->tun_itf = sw_if_index;
4282 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4285 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4286 vnet_api_error_t rv = 0;
4289 return VNET_API_ERROR_INVALID_VALUE;
4293 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4294 return VNET_API_ERROR_VALUE_EXIST;
4296 rv = ikev2_register_udp_port (p, port);
4300 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4301 return VNET_API_ERROR_INVALID_VALUE;
4303 ikev2_unregister_udp_port (p);
4309 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4311 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4316 r = clib_error_return (0, "unknown profile %v", name);
4325 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4326 u64 lifetime, u32 jitter, u32 handover,
4332 p = ikev2_profile_index_by_name (name);
4336 r = clib_error_return (0, "unknown profile %v", name);
4340 p->lifetime = lifetime;
4341 p->lifetime_jitter = jitter;
4342 p->handover = handover;
4343 p->lifetime_maxdata = maxdata;
4348 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4349 ip_address_t * out_addr)
4351 ip4_address_t *if_ip4;
4352 ip6_address_t *if_ip6;
4356 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4359 ip_address_set (out_addr, if_ip4, AF_IP4);
4365 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4368 ip_address_set (out_addr, if_ip6, AF_IP6);
4375 static clib_error_t *
4376 ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r)
4378 ikev2_main_t *km = &ikev2_main;
4379 dns_cache_entry_t *ep = 0;
4380 dns_pending_request_t _t0, *t0 = &_t0;
4381 dns_resolve_name_t _rn, *rn = &_rn;
4385 if (!km->dns_resolve_name)
4386 return clib_error_return (0, "cannot load symbols from dns plugin");
4388 t0->request_type = DNS_API_PENDING_NAME_TO_IP;
4389 /* VPP main curse: IKEv2 uses only non-NULL terminated vectors internally
4390 * whereas DNS resolver expects a NULL-terminated C-string */
4391 name = vec_dup (r->hostname);
4392 vec_terminate_c_string (name);
4393 rv = km->dns_resolve_name (name, &ep, t0, rn);
4396 return clib_error_return (0, "dns lookup failure");
4401 ip_address_copy (&r->addr, &rn->address);
4407 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4411 ikev2_main_t *km = &ikev2_main;
4415 int len = sizeof (ike_header_t), valid_ip = 0;
4416 ip_address_t src_if_ip = ip_address_initializer;
4418 p = ikev2_profile_index_by_name (name);
4422 r = clib_error_return (0, "unknown profile %v", name);
4426 if (p->responder.sw_if_index == ~0 ||
4427 (ip_address_is_zero (&p->responder.addr) &&
4428 vec_len (p->responder.hostname) == 0))
4430 r = clib_error_return (0, "responder not set for profile %v", name);
4434 if (!p->responder.is_resolved)
4436 /* try to resolve using dns plugin
4437 * success does not mean we have resolved the name */
4438 r = ikev2_resolve_responder_hostname (vm, &p->responder);
4443 if (p->responder.is_resolved &&
4444 ikev2_get_if_address (p->responder.sw_if_index,
4445 ip_addr_version (&p->responder.addr), &src_if_ip))
4450 /* Prepare the SA and the IKE payload */
4452 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4453 ikev2_payload_chain_t *chain = 0;
4454 ikev2_payload_new_chain (chain);
4456 /* Build the IKE proposal payload */
4457 ikev2_sa_proposal_t *proposals = 0;
4458 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4459 proposals[0].proposal_num = 1;
4460 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4462 /* Add and then cleanup proposal data */
4463 ikev2_payload_add_sa (chain, proposals);
4464 ikev2_sa_free_proposal_vector (&proposals);
4466 sa.is_initiator = 1;
4467 sa.profile_index = p - km->profiles;
4468 sa.state = IKEV2_STATE_SA_INIT;
4469 sa.tun_itf = p->tun_itf;
4470 sa.udp_encap = p->udp_encap;
4471 if (p->natt_disabled)
4472 sa.natt_state = IKEV2_NATT_DISABLED;
4473 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4474 sa.is_tun_itf_set = 1;
4475 sa.initial_contact = 1;
4476 sa.dst_port = IKEV2_PORT;
4478 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4479 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4481 ikev2_sa_free_all_vec (&sa);
4482 ikev2_payload_destroy_chain (chain);
4483 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4486 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4487 ikev2_payload_add_nonce (chain, sa.i_nonce);
4489 /* Build the child SA proposal */
4490 vec_resize (sa.childs, 1);
4491 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4492 &sa.childs[0].i_proposals, 0);
4493 sa.childs[0].i_proposals[0].proposal_num = 1;
4494 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4495 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4496 sizeof (sa.childs[0].i_proposals[0].spi));
4498 /* Add NAT detection notification messages (mandatory) */
4499 u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 (
4500 clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip,
4501 clib_host_to_net_u16 (IKEV2_PORT));
4503 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4504 nat_detection_sha1);
4505 vec_free (nat_detection_sha1);
4506 nat_detection_sha1 =
4507 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4508 clib_host_to_net_u64 (sa.rspi),
4510 clib_host_to_net_u16 (sa.dst_port));
4511 ikev2_payload_add_notify (chain,
4512 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4513 nat_detection_sha1);
4514 vec_free (nat_detection_sha1);
4516 u8 *sig_hash_algo = vec_new (u8, 8);
4517 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4518 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4519 ikev2_payload_add_notify (chain,
4520 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4522 vec_free (sig_hash_algo);
4524 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4527 ikev2_sa_free_all_vec (&sa);
4528 ikev2_payload_destroy_chain (chain);
4529 char *errmsg = "buffer alloc failure";
4530 ikev2_log_error (errmsg);
4531 return clib_error_return (0, errmsg);
4533 ike0 = vlib_buffer_get_current (b0);
4535 /* Buffer update and boilerplate */
4536 len += vec_len (chain->data);
4537 ike0->nextpayload = chain->first_payload_type;
4538 ike0->length = clib_host_to_net_u32 (len);
4539 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4540 ikev2_payload_destroy_chain (chain);
4542 ike0->version = IKE_VERSION_2;
4543 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4544 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4545 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4548 sa.last_init_msg_id += 1;
4550 /* store whole IKE payload - needed for PSK auth */
4551 vec_reset_length (sa.last_sa_init_req_packet_data);
4552 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4554 /* add data to the SA then add it to the pool */
4555 ip_address_copy (&sa.iaddr, &src_if_ip);
4556 ip_address_copy (&sa.raddr, &p->responder.addr);
4557 sa.i_id.type = p->loc_id.type;
4558 sa.i_id.data = vec_dup (p->loc_id.data);
4559 sa.r_id.type = p->rem_id.type;
4560 sa.r_id.data = vec_dup (p->rem_id.data);
4561 sa.i_auth.method = p->auth.method;
4562 sa.i_auth.hex = p->auth.hex;
4563 sa.i_auth.data = vec_dup (p->auth.data);
4564 sa.sw_if_index = p->responder.sw_if_index;
4565 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4566 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4568 ikev2_initial_contact_cleanup (0, &sa);
4570 /* add SA to the pool */
4571 ikev2_sa_t *sa0 = 0;
4572 pool_get (km->sais, sa0);
4573 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4574 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4578 ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT,
4579 sa.dst_port, sa.sw_if_index);
4582 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4583 clib_host_to_net_u64 (sa0->ispi), 0,
4584 ip_addr_v4 (&p->responder.addr).as_u32,
4585 ip_addr_version (&p->responder.addr) == AF_IP4);
4592 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4593 ikev2_child_sa_t * csa)
4595 /* Create the Initiator notification for child SA removal */
4596 ikev2_main_t *km = &ikev2_main;
4602 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4605 ikev2_log_error ("buffer alloc failure");
4609 ike0 = vlib_buffer_get_current (b0);
4610 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4611 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4612 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4614 vec_resize (sa->del, 1);
4615 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4616 sa->del->spi = csa->i_proposals->spi;
4617 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4618 sa->last_init_msg_id += 1;
4619 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4623 if (ikev2_natt_active (sa))
4624 len = ikev2_insert_non_esp_marker (ike0, len);
4625 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4626 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4628 /* delete local child SA */
4629 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4630 ikev2_sa_del_child_sa (sa, csa);
4634 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4637 ikev2_main_t *km = &ikev2_main;
4638 ikev2_main_per_thread_data_t *tkm;
4639 ikev2_sa_t *fsa = 0;
4640 ikev2_child_sa_t *fchild = 0;
4642 /* Search for the child SA */
4643 vec_foreach (tkm, km->per_thread_data)
4649 pool_foreach (sa, tkm->sas) {
4650 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4660 if (!fchild || !fsa)
4662 r = clib_error_return (0, "Child SA not found");
4667 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4674 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4677 ikev2_main_t *km = &ikev2_main;
4678 ikev2_main_per_thread_data_t *tkm;
4679 ikev2_sa_t *fsa = 0;
4680 ikev2_main_per_thread_data_t *ftkm = 0;
4682 /* Search for the IKE SA */
4683 vec_foreach (tkm, km->per_thread_data)
4689 pool_foreach (sa, tkm->sas) {
4690 if (sa->ispi == ispi)
4702 r = clib_error_return (0, "IKE SA not found");
4706 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4711 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4712 ikev2_child_sa_t * csa)
4714 /* Create the Initiator request for create child SA */
4720 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4723 ikev2_log_error ("buffer alloc failure");
4727 ike0 = vlib_buffer_get_current (b0);
4728 ike0->version = IKE_VERSION_2;
4729 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4730 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4731 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4732 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4733 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4734 sa->last_init_msg_id += 1;
4736 ikev2_rekey_t *rekey;
4737 vec_reset_length (sa->rekey);
4738 vec_add2 (sa->rekey, rekey, 1);
4739 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4742 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4743 rekey->spi = proposals[0].spi;
4744 rekey->ispi = csa->i_proposals->spi;
4745 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4749 if (ikev2_natt_active (sa))
4750 len = ikev2_insert_non_esp_marker (ike0, len);
4751 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4752 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4753 vec_free (proposals);
4757 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4760 ikev2_main_t *km = &ikev2_main;
4761 ikev2_main_per_thread_data_t *tkm;
4762 ikev2_sa_t *fsa = 0;
4763 ikev2_child_sa_t *fchild = 0;
4765 /* Search for the child SA */
4766 vec_foreach (tkm, km->per_thread_data)
4772 pool_foreach (sa, tkm->sas) {
4773 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4783 if (!fchild || !fsa)
4785 r = clib_error_return (0, "Child SA not found");
4790 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4797 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4799 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4803 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4805 u64 *ispi, *ispi_vec = 0;
4806 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4807 ikev2_main_t *km = &ikev2_main;
4808 ikev2_main_per_thread_data_t *tkm;
4809 p->responder.sw_if_index = ~0;
4811 vec_foreach (tkm, km->per_thread_data)
4814 pool_foreach (sa, tkm->sas) {
4815 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4816 vec_add1 (sa_vec, sa);
4820 vec_foreach (sap, sa_vec)
4822 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4824 vec_reset_length (sa_vec);
4829 pool_foreach (sa, km->sais) {
4830 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4831 vec_add1 (ispi_vec, sa->ispi);
4835 vec_foreach (ispi, ispi_vec)
4837 ikev2_del_sa_init_from_main (ispi);
4840 vec_free (ispi_vec);
4843 static clib_error_t *
4844 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4846 ikev2_main_t *km = &ikev2_main;
4853 pool_foreach (p, km->profiles) {
4854 if (p->responder.sw_if_index == sw_if_index)
4855 ikev2_sa_del (p, sw_if_index);
4862 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4865 ikev2_init (vlib_main_t * vm)
4867 ikev2_main_t *km = &ikev2_main;
4869 clib_memset (km, 0, sizeof (ikev2_main_t));
4871 km->log_level = IKEV2_LOG_ERROR;
4872 km->log_class = vlib_log_register_class ("ikev2", 0);
4874 km->vnet_main = vnet_get_main ();
4877 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4878 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4884 VLIB_INIT_FUNCTION (ikev2_init) = {
4885 .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init"),
4890 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4893 ikev2_main_t *km = &ikev2_main;
4894 ikev2_profile_t *p = 0;
4895 vlib_main_t *vm = km->vlib_main;
4896 f64 now = vlib_time_now (vm);
4899 if (sa->profile_index != ~0)
4900 p = pool_elt_at_index (km->profiles, sa->profile_index);
4902 if (sa->is_initiator && p && csa->time_to_expiration
4903 && now > csa->time_to_expiration)
4905 if (!csa->is_expired || csa->rekey_retries > 0)
4907 ikev2_rekey_child_sa_internal (vm, sa, csa);
4908 csa->time_to_expiration = now + p->handover;
4909 csa->is_expired = 1;
4910 if (csa->rekey_retries == 0)
4912 csa->rekey_retries = 5;
4914 else if (csa->rekey_retries > 0)
4916 csa->rekey_retries--;
4917 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4918 csa->i_proposals->spi, csa->rekey_retries);
4919 if (csa->rekey_retries == 0)
4921 csa->rekey_retries = -1;
4928 csa->time_to_expiration = 0;
4929 ikev2_delete_child_sa_internal (vm, sa, csa);
4937 ipip_tunnel_t *ipip = NULL;
4938 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4939 if (~0 == sw_if_index)
4941 ip46_address_t local_ip;
4942 ip46_address_t remote_ip;
4943 if (sa->is_initiator)
4945 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4946 ip_addr_bytes (&sa->iaddr));
4947 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4948 ip_addr_bytes (&sa->raddr));
4952 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4953 ip_addr_bytes (&sa->raddr));
4954 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4955 ip_addr_bytes (&sa->iaddr));
4959 ipip_tunnel_key_t key = {
4962 .transport = IPIP_TRANSPORT_IP4,
4967 ipip = ipip_tunnel_db_find (&key);
4970 sw_if_index = ipip->sw_if_index;
4976 vec_add1 (sas_in, csa->remote_sa_id);
4977 vlib_worker_thread_barrier_sync (vm);
4978 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4979 csa->local_sa_id, sas_in);
4982 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4983 vlib_worker_thread_barrier_release (vm);
4990 ikev2_set_log_level (ikev2_log_level_t log_level)
4992 ikev2_main_t *km = &ikev2_main;
4994 if (log_level >= IKEV2_LOG_MAX)
4996 ikev2_log_error ("unknown logging level %d", log_level);
5000 km->log_level = log_level;
5005 ikev2_set_liveness_params (u32 period, u32 max_retries)
5007 ikev2_main_t *km = &ikev2_main;
5009 if (period == 0 || max_retries == 0)
5010 return clib_error_return (0, "invalid args");
5012 km->liveness_period = period;
5013 km->liveness_max_retries = max_retries;
5018 ikev2_profile_natt_disable (u8 * name)
5020 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
5022 return clib_error_return (0, "unknown profile %v", name);
5024 p->natt_disabled = 1;
5029 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
5031 ikev2_main_t *km = &ikev2_main;
5032 vlib_main_t *vm = km->vlib_main;
5033 ikev2_main_per_thread_data_t *tkm;
5034 ikev2_sa_t *fsa = 0;
5035 ikev2_profile_t *p = 0;
5036 ikev2_child_sa_t *fchild = 0;
5037 f64 now = vlib_time_now (vm);
5038 vlib_counter_t counts;
5040 /* Search for the SA and child SA */
5041 vec_foreach (tkm, km->per_thread_data)
5047 pool_foreach (sa, tkm->sas) {
5048 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
5057 vlib_get_combined_counter (&ipsec_sa_counters,
5058 ipsec_sa->stat_index, &counts);
5060 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
5061 p = pool_elt_at_index (km->profiles, fsa->profile_index);
5063 if (fchild && p && p->lifetime_maxdata)
5065 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
5067 fchild->time_to_expiration = now;
5073 ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km,
5079 p = pool_elt_at_index (km->profiles, sa->profile_index);
5081 if (!p->responder.is_resolved)
5083 clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder);
5086 clib_error_free (r);
5090 if (!p->responder.is_resolved)
5093 ip_address_copy (&sa->raddr, &p->responder.addr);
5095 /* update nat detection destination hash */
5096 np = ikev2_find_ike_notify_payload (
5097 (ike_header_t *) sa->last_sa_init_req_packet_data,
5098 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP);
5101 nat_sha = ikev2_compute_nat_sha1 (
5102 clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi),
5103 &sa->raddr, clib_host_to_net_u16 (sa->dst_port));
5104 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5109 if (ip_address_is_zero (&sa->iaddr))
5111 if (!ikev2_get_if_address (p->responder.sw_if_index,
5112 ip_addr_version (&p->responder.addr),
5116 /* update NAT detection payload */
5118 ikev2_find_ike_notify_payload
5119 ((ike_header_t *) sa->last_sa_init_req_packet_data,
5120 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
5124 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
5125 clib_host_to_net_u64 (sa->rspi),
5127 clib_host_to_net_u16 (IKEV2_PORT));
5128 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5133 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5136 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5137 clib_memcpy_fast (vlib_buffer_get_current (b),
5138 sa->last_sa_init_req_packet_data,
5139 vec_len (sa->last_sa_init_req_packet_data));
5141 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5142 vec_len (sa->last_sa_init_req_packet_data),
5143 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5147 ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km)
5154 hash_foreach (ispi, sai, km->sa_by_ispi,
5156 sa = pool_elt_at_index (km->sais, sai);
5157 if (sa->init_response_received)
5160 ikev2_process_pending_sa_init_one (vm, km, sa);
5166 ikev2_send_informational_request (ikev2_sa_t * sa)
5168 ikev2_main_t *km = &ikev2_main;
5169 ip_address_t *src, *dst;
5176 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5179 ikev2_log_error ("buffer alloc failure");
5183 ike0 = vlib_buffer_get_current (b0);
5184 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5185 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5186 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5187 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5189 sa->last_init_msg_id += 1;
5190 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5194 if (ikev2_natt_active (sa))
5195 len = ikev2_insert_non_esp_marker (ike0, len);
5197 if (sa->is_initiator)
5208 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5209 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5214 ikev2_disable_dpd (void)
5216 ikev2_main_t *km = &ikev2_main;
5217 km->dpd_disabled = 1;
5221 ikev2_mngr_process_responder_sas (ikev2_sa_t *sa)
5223 ikev2_main_t *km = &ikev2_main;
5224 vlib_main_t *vm = km->vlib_main;
5226 if (!sa->keys_generated)
5229 if (sa->liveness_retries >= km->liveness_max_retries)
5232 f64 now = vlib_time_now (vm);
5234 if (sa->liveness_period_check < now)
5236 sa->liveness_retries++;
5237 sa->liveness_period_check = now + km->liveness_period;
5238 ikev2_send_informational_request (sa);
5244 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5247 ikev2_main_t *km = &ikev2_main;
5249 ikev2_child_sa_t *c;
5252 /* lazy init will wake it up */
5253 vlib_process_wait_for_event (vm);
5257 vlib_process_wait_for_event_or_clock (vm, 2);
5258 vlib_process_get_events (vm, NULL);
5260 /* process ike child sas */
5261 ikev2_main_per_thread_data_t *tkm;
5262 vec_foreach (tkm, km->per_thread_data)
5265 u32 *to_be_deleted = 0;
5268 pool_foreach (sa, tkm->sas) {
5269 ikev2_child_sa_t *c;
5272 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5275 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5277 sa->old_remote_id_present = 0;
5281 sa->old_id_expiration -= 1;
5283 vec_foreach (c, sa->childs)
5284 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5286 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5287 vec_add1 (to_be_deleted, sa - tkm->sas);
5291 vec_foreach (sai, to_be_deleted)
5293 sa = pool_elt_at_index (tkm->sas, sai[0]);
5294 const u32 profile_index = sa->profile_index;
5295 const int reinitiate = (sa->is_initiator && profile_index != ~0);
5296 vec_foreach (c, sa->childs)
5298 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5299 ikev2_sa_del_child_sa (sa, c);
5301 ikev2_sa_free_all_vec (sa);
5302 hash_unset (tkm->sa_by_rspi, sa->rspi);
5303 pool_put (tkm->sas, sa);
5307 p = pool_elt_at_index (km->profiles, profile_index);
5310 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5313 ikev2_log_error ("%U", format_clib_error, e);
5314 clib_error_free (e);
5319 vec_free (to_be_deleted);
5322 /* process ipsec sas */
5325 pool_foreach (sa, ipsec_sa_pool)
5327 ikev2_mngr_process_ipsec_sa (sa);
5331 ikev2_process_pending_sa_init (vm, km);
5337 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5338 .function = ikev2_mngr_process_fn,
5339 .type = VLIB_NODE_TYPE_PROCESS,
5341 "ikev2-manager-process",
5345 ikev2_lazy_init (ikev2_main_t *km)
5347 vlib_thread_main_t *tm = vlib_get_thread_main ();
5350 if (km->lazy_init_done)
5353 ikev2_crypto_init (km);
5355 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
5357 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
5358 CLIB_CACHE_LINE_BYTES);
5359 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
5361 ikev2_main_per_thread_data_t *ptd =
5362 vec_elt_at_index (km->per_thread_data, thread_id);
5364 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
5366 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
5367 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
5368 ptd->hmac_ctx = HMAC_CTX_new ();
5370 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
5371 ptd->evp_ctx = &ptd->_evp_ctx;
5372 HMAC_CTX_init (&(ptd->_hmac_ctx));
5373 ptd->hmac_ctx = &ptd->_hmac_ctx;
5377 km->sa_by_ispi = hash_create (0, sizeof (uword));
5378 km->sw_if_indices = hash_create (0, 0);
5380 km->punt_hdl = vlib_punt_client_register ("ikev2");
5382 km->dns_resolve_name =
5383 vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name");
5384 if (!km->dns_resolve_name)
5385 ikev2_log_error ("cannot load symbols from dns plugin");
5387 /* wake up ikev2 process */
5388 vlib_process_signal_event (vlib_get_first_main (),
5389 ikev2_mngr_process_node.index, 0, 0);
5391 km->lazy_init_done = 1;
5394 VLIB_PLUGIN_REGISTER () = {
5395 .version = VPP_BUILD_VER,
5396 .description = "Internet Key Exchange (IKEv2) Protocol",
5401 * fd.io coding-style-patch-verification: ON
5404 * eval: (c-set-style "gnu")