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)
667 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
668 vec_reset_length (ke_data[0]);
669 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
674 ikev2_parse_nonce_payload (const void *p, u32 rlen, const u8 **nonce)
676 const ike_payload_header_t *ikep = p;
677 u16 plen = clib_net_to_host_u16 (ikep->length);
678 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
679 int len = plen - sizeof (*ikep);
680 ASSERT (len >= 16 && len <= 256);
681 if (PREDICT_FALSE (len < 16 || len > 256))
683 *nonce = ikep->payload;
688 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
691 if (sizeof (*ikep) > rlen)
693 *plen = clib_net_to_host_u16 (ikep->length);
694 if (*plen < sizeof (*ikep) || *plen > rlen)
700 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
701 udp_header_t *udp, u32 len, u32 sw_if_index)
704 u8 payload = ike->nextpayload;
705 ike_payload_header_t *ikep;
708 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
709 "from ", clib_net_to_host_u64 (ike->ispi),
710 clib_net_to_host_u64 (ike->rspi),
711 ip_addr_v4 (&sa->iaddr).as_u32,
712 ip_addr_version (&sa->iaddr) == AF_IP4);
714 sa->ispi = clib_net_to_host_u64 (ike->ispi);
715 sa->sw_if_index = sw_if_index;
717 /* store whole IKE payload - needed for PSK auth */
718 vec_reset_length (sa->last_sa_init_req_packet_data);
719 vec_add (sa->last_sa_init_req_packet_data, ike, len);
721 if (len < sizeof (*ike))
724 len -= sizeof (*ike);
725 while (p < len && payload != IKEV2_PAYLOAD_NONE)
727 ikep = (ike_payload_header_t *) & ike->payload[p];
728 int current_length = len - p;
729 if (!ikev2_check_payload_length (ikep, current_length, &plen))
732 if (payload == IKEV2_PAYLOAD_SA)
734 ikev2_sa_free_proposal_vector (&sa->i_proposals);
735 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
737 else if (payload == IKEV2_PAYLOAD_KE)
739 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
743 else if (payload == IKEV2_PAYLOAD_NONCE)
747 vec_reset_length (sa->i_nonce);
748 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
751 vec_add (sa->i_nonce, nonce, nonce_len);
753 else if (payload == IKEV2_PAYLOAD_NOTIFY)
756 ikev2_parse_notify_payload (ikep, current_length);
757 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
759 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
761 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
763 if (sa->natt_state == IKEV2_NATT_ENABLED)
764 sa->natt_state = IKEV2_NATT_ACTIVE;
765 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
766 " behind NAT", sa->ispi);
770 else if (n->msg_type ==
771 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
773 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
775 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
777 if (sa->natt_state == IKEV2_NATT_ENABLED)
778 sa->natt_state = IKEV2_NATT_ACTIVE;
779 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
780 " (self) behind NAT", sa->ispi);
786 else if (payload == IKEV2_PAYLOAD_VENDOR)
788 ikev2_parse_vendor_payload (ikep);
792 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
794 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
796 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
797 sa->unsupported_cp = payload;
802 payload = ikep->nextpayload;
806 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
811 ikev2_process_sa_init_resp (vlib_main_t * vm,
812 ikev2_sa_t * sa, ike_header_t * ike,
813 udp_header_t * udp, u32 len)
816 u8 payload = ike->nextpayload;
817 ike_payload_header_t *ikep;
820 sa->ispi = clib_net_to_host_u64 (ike->ispi);
821 sa->rspi = clib_net_to_host_u64 (ike->rspi);
823 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
824 "from ", sa->ispi, sa->rspi,
825 ip_addr_v4 (&sa->raddr).as_u32,
826 ip_addr_version (&sa->raddr) == AF_IP4);
828 /* store whole IKE payload - needed for PSK auth */
829 vec_reset_length (sa->last_sa_init_res_packet_data);
830 vec_add (sa->last_sa_init_res_packet_data, ike, len);
832 if (sizeof (*ike) > len)
835 len -= sizeof (*ike);
836 while (p < len && payload != IKEV2_PAYLOAD_NONE)
838 int current_length = len - p;
839 ikep = (ike_payload_header_t *) & ike->payload[p];
840 if (!ikev2_check_payload_length (ikep, current_length, &plen))
843 if (payload == IKEV2_PAYLOAD_SA)
845 ikev2_sa_free_proposal_vector (&sa->r_proposals);
846 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
849 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
851 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
854 else if (payload == IKEV2_PAYLOAD_KE)
856 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
860 else if (payload == IKEV2_PAYLOAD_NONCE)
864 vec_reset_length (sa->r_nonce);
865 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
868 vec_add (sa->r_nonce, nonce, nonce_len);
870 else if (payload == IKEV2_PAYLOAD_NOTIFY)
873 ikev2_parse_notify_payload (ikep, current_length);
874 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
876 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
879 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
881 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
882 " behind NAT, unsupported", sa->ispi);
886 else if (n->msg_type ==
887 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
889 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
892 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
894 if (sa->natt_state == IKEV2_NATT_ENABLED)
895 sa->natt_state = IKEV2_NATT_ACTIVE;
896 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
897 " (self) behind NAT", sa->ispi);
903 else if (payload == IKEV2_PAYLOAD_VENDOR)
905 ikev2_parse_vendor_payload (ikep);
909 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
911 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
913 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
914 sa->unsupported_cp = payload;
919 payload = ikep->nextpayload;
925 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
926 u8 * payload, u32 rlen, u32 * out_len)
928 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
930 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
931 ike_payload_header_t *ikep = 0;
934 ikev2_sa_transform_t *tr_integ;
935 ikev2_sa_transform_t *tr_encr;
937 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
939 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
940 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
942 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
945 if (rlen <= sizeof (*ike))
948 int len = rlen - sizeof (*ike);
950 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
952 ikep = (ike_payload_header_t *) & ike->payload[p];
953 int current_length = len - p;
954 if (!ikev2_check_payload_length (ikep, current_length, &plen))
957 if (*payload == IKEV2_PAYLOAD_SK)
959 last_payload = *payload;
963 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
965 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
967 sa->unsupported_cp = *payload;
972 *payload = ikep->nextpayload;
976 if (last_payload != IKEV2_PAYLOAD_SK)
978 ikev2_elog_error ("Last payload must be SK");
984 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
987 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
988 u8 *aad = (u8 *) ike;
989 u32 aad_len = ikep->payload - aad;
990 u8 *tag = ikep->payload + plen;
992 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
993 plen, aad, aad_len, tag, &dlen);
997 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
1002 if (rlen < tr_integ->key_trunc)
1006 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1007 (u8 *) ike, rlen - tr_integ->key_trunc);
1009 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1012 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1014 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1016 ikev2_elog_error ("message integrity check failed");
1022 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1027 plaintext = ikep->payload + tr_encr->block_size;
1035 ikev2_is_id_equal (ikev2_id_t *i1, ikev2_id_t *i2)
1037 if (i1->type != i2->type)
1040 if (vec_len (i1->data) != vec_len (i2->data))
1043 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1050 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1053 ikev2_main_t *km = &ikev2_main;
1056 ikev2_child_sa_t *c;
1058 /* find old IKE SAs with the same authenticated identity */
1060 pool_foreach (tmp, ptd->sas) {
1061 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1062 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1065 if (sa->rspi != tmp->rspi)
1066 vec_add1(delete, tmp - ptd->sas);
1070 for (i = 0; i < vec_len (delete); i++)
1072 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1073 vec_foreach (c, tmp->childs)
1075 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1077 ikev2_delete_sa (ptd, tmp);
1081 sa->initial_contact = 0;
1085 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1088 ikev2_main_t *km = &ikev2_main;
1090 if (!sa->initial_contact)
1095 ikev2_initial_contact_cleanup_internal (ptd, sa);
1099 vec_foreach (ptd, km->per_thread_data)
1100 ikev2_initial_contact_cleanup_internal (ptd, sa);
1102 sa->initial_contact = 0;
1106 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1108 const ike_id_payload_header_t *id = p;
1109 u16 plen = clib_net_to_host_u16 (id->length);
1110 if (plen < sizeof (*id) || plen > rlen)
1113 sa_id->type = id->id_type;
1114 vec_reset_length (sa_id->data);
1115 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1121 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1123 const ike_auth_payload_header_t *ah = p;
1124 u16 plen = clib_net_to_host_u16 (ah->length);
1126 a->method = ah->auth_method;
1127 vec_reset_length (a->data);
1128 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1133 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1134 ike_header_t * ike, u32 len)
1137 ikev2_child_sa_t *first_child_sa;
1138 u8 payload = ike->nextpayload;
1140 ike_payload_header_t *ikep;
1144 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1145 "from ", clib_host_to_net_u64 (ike->ispi),
1146 clib_host_to_net_u64 (ike->rspi),
1148 ip_addr_v4 (&sa->raddr).as_u32 :
1149 ip_addr_v4 (&sa->iaddr).as_u32,
1150 ip_addr_version (&sa->raddr) == AF_IP4);
1152 ikev2_calc_keys (sa);
1154 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1158 if (sa->unsupported_cp)
1160 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1166 /* select or create 1st child SA */
1167 if (sa->is_initiator)
1169 first_child_sa = &sa->childs[0];
1173 ikev2_sa_free_all_child_sa (&sa->childs);
1174 vec_add2 (sa->childs, first_child_sa, 1);
1178 /* process encrypted payload */
1179 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1181 ikep = (ike_payload_header_t *) & plaintext[p];
1182 int current_length = dlen - p;
1183 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1186 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1188 if (sa->is_initiator)
1190 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1191 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1196 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1197 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1201 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1203 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1206 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1208 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1211 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1213 if (sa->is_initiator)
1215 if (!ikev2_parse_auth_payload (ikep, current_length,
1221 if (!ikev2_parse_auth_payload (ikep, current_length,
1226 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1229 ikev2_parse_notify_payload (ikep, current_length);
1230 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1232 sa->initial_contact = 1;
1236 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1238 ikev2_parse_vendor_payload (ikep);
1240 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1242 vec_free (first_child_sa->tsi);
1243 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1245 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1247 vec_free (first_child_sa->tsr);
1248 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1252 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1255 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1257 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1258 sa->unsupported_cp = payload;
1263 payload = ikep->nextpayload;
1270 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1275 ikev2_process_informational_req (vlib_main_t * vm,
1276 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1279 u8 payload = ike->nextpayload;
1281 ike_payload_header_t *ikep;
1283 ikev2_notify_t *n = 0;
1285 sa->liveness_retries = 0;
1286 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1287 "from ", clib_host_to_net_u64 (ike->ispi),
1288 clib_host_to_net_u64 (ike->rspi),
1289 ip_addr_v4 (&sa->iaddr).as_u32,
1290 ip_addr_version (&sa->iaddr) == AF_IP4);
1292 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1297 /* process encrypted payload */
1299 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1301 u32 current_length = dlen - p;
1302 if (p + sizeof (*ikep) > dlen)
1305 ikep = (ike_payload_header_t *) & plaintext[p];
1306 u16 plen = clib_net_to_host_u16 (ikep->length);
1308 if (plen < sizeof (*ikep) || plen > current_length)
1311 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1313 n = ikev2_parse_notify_payload (ikep, current_length);
1316 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1317 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1320 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1322 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1324 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1326 ikev2_parse_vendor_payload (ikep);
1330 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1332 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1334 sa->unsupported_cp = payload;
1338 payload = ikep->nextpayload;
1345 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1346 ikev2_sa_t * sa, ike_header_t * ike,
1350 u8 payload = ike->nextpayload;
1353 ikev2_rekey_t *rekey;
1354 ike_payload_header_t *ikep;
1355 ikev2_notify_t *n = 0;
1356 ikev2_ts_t *tsi = 0;
1357 ikev2_ts_t *tsr = 0;
1358 ikev2_sa_proposal_t *proposal = 0;
1359 ikev2_child_sa_t *child_sa;
1362 const u8 *nonce = 0;
1365 if (sa->is_initiator)
1366 src = ip_addr_v4 (&sa->raddr).as_u32;
1368 src = ip_addr_v4 (&sa->iaddr).as_u32;
1370 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1371 clib_host_to_net_u64 (ike->ispi),
1372 clib_host_to_net_u64 (ike->rspi), src,
1373 ip_addr_version (&sa->raddr) == AF_IP4);
1375 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1378 goto cleanup_and_exit;
1380 /* process encrypted payload */
1382 while (payload != IKEV2_PAYLOAD_NONE)
1384 ikep = (ike_payload_header_t *) & plaintext[p];
1385 int current_length = dlen - p;
1386 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1387 goto cleanup_and_exit;
1389 if (payload == IKEV2_PAYLOAD_SA)
1391 proposal = ikev2_parse_sa_payload (ikep, current_length);
1393 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1395 n = ikev2_parse_notify_payload (ikep, current_length);
1396 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1401 else if (payload == IKEV2_PAYLOAD_DELETE)
1403 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1405 else if (payload == IKEV2_PAYLOAD_VENDOR)
1407 ikev2_parse_vendor_payload (ikep);
1409 else if (payload == IKEV2_PAYLOAD_NONCE)
1411 nonce_len = ikev2_parse_nonce_payload (ikep, current_length, &nonce);
1413 goto cleanup_and_exit;
1415 else if (payload == IKEV2_PAYLOAD_TSI)
1417 tsi = ikev2_parse_ts_payload (ikep, current_length);
1419 else if (payload == IKEV2_PAYLOAD_TSR)
1421 tsr = ikev2_parse_ts_payload (ikep, current_length);
1425 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1427 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1429 sa->unsupported_cp = payload;
1430 goto cleanup_and_exit;
1433 payload = ikep->nextpayload;
1437 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP || !nonce)
1438 goto cleanup_and_exit;
1440 if (sa->is_initiator)
1443 if (vec_len (rekey) == 0)
1444 goto cleanup_and_exit;
1445 rekey->protocol_id = proposal->protocol_id;
1447 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1448 rekey->i_proposal->spi = rekey->spi;
1449 rekey->r_proposal = proposal;
1453 vec_reset_length (sa->r_nonce);
1454 vec_add (sa->r_nonce, nonce, nonce_len);
1455 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1458 child_sa->rekey_retries = 0;
1465 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1468 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1470 goto cleanup_and_exit;
1472 vec_add2 (sa->rekey, rekey, 1);
1473 rekey->protocol_id = n->protocol_id;
1474 rekey->spi = n->spi;
1475 rekey->i_proposal = proposal;
1477 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1479 vec_reset_length (sa->i_nonce);
1480 vec_add (sa->i_nonce, nonce, nonce_len);
1481 /* generate new Nr */
1482 vec_validate (sa->r_nonce, nonce_len - 1);
1483 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1487 /* create new child SA */
1488 vec_add2 (sa->new_child, rekey, 1);
1489 rekey->i_proposal = proposal;
1491 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1493 vec_reset_length (sa->i_nonce);
1494 vec_add (sa->i_nonce, nonce, nonce_len);
1495 /* generate new Nr */
1496 vec_validate (sa->r_nonce, nonce_len - 1);
1497 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1507 vec_free (proposal);
1514 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1522 ikev2_sa_transform_t *tr_prf;
1525 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1531 nonce = sa->i_nonce;
1532 packet_data = sa->last_sa_init_res_packet_data;
1538 nonce = sa->r_nonce;
1539 packet_data = sa->last_sa_init_req_packet_data;
1542 data = vec_new (u8, 4);
1544 vec_append (data, id->data);
1546 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1547 vec_append (authmsg, packet_data);
1548 vec_append (authmsg, nonce);
1549 vec_append (authmsg, id_hash);
1557 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1559 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1560 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1561 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1562 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1569 ikev2_sa_match_ts (ikev2_sa_t * sa)
1571 ikev2_main_t *km = &ikev2_main;
1573 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1574 ikev2_id_t *id_rem, *id_loc;
1577 pool_foreach (p, km->profiles) {
1579 if (sa->is_initiator)
1595 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1596 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1599 sa->profile_index = p - km->profiles;
1601 vec_foreach(ts, sa->childs[0].tsi)
1603 if (ikev2_ts_cmp(p_tsi, ts))
1605 vec_add1 (tsi, ts[0]);
1610 vec_foreach(ts, sa->childs[0].tsr)
1612 if (ikev2_ts_cmp(p_tsr, ts))
1614 vec_add1 (tsr, ts[0]);
1625 vec_free (sa->childs[0].tsi);
1626 vec_free (sa->childs[0].tsr);
1627 sa->childs[0].tsi = tsi;
1628 sa->childs[0].tsr = tsr;
1634 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1638 static ikev2_profile_t *
1639 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1640 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1642 ikev2_profile_t *ret = 0, *p;
1643 ikev2_id_t *id_rem, *id_loc;
1644 ikev2_auth_t *sa_auth;
1645 u8 *authmsg, *psk = 0, *auth = 0;
1647 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1649 if (sa->is_initiator)
1653 sa_auth = &sa->r_auth;
1659 sa_auth = &sa->i_auth;
1662 pool_foreach (p, km->profiles)
1665 if (!ikev2_is_id_equal (&p->rem_id, id_rem) ||
1666 !ikev2_is_id_equal (&p->loc_id, id_loc))
1669 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1671 if (!p->auth.data ||
1672 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1675 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1676 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1678 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1680 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1687 ikev2_elog_uint (IKEV2_LOG_ERROR,
1688 "shared key mismatch! ispi %lx", sa->ispi);
1691 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1693 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1696 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1698 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1704 ikev2_elog_uint (IKEV2_LOG_ERROR,
1705 "cert verification failed! ispi %lx", sa->ispi);
1714 ikev2_sa_auth (ikev2_sa_t *sa)
1716 ikev2_main_t *km = &ikev2_main;
1717 ikev2_profile_t *sel_p = 0;
1718 ikev2_sa_transform_t *tr_prf;
1719 u8 *psk, *authmsg, *key_pad;
1722 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1724 /* only shared key and rsa signature */
1725 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1726 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1728 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1730 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1734 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1735 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1739 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1740 sa->udp_encap = sel_p->udp_encap;
1741 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1743 if (!sa->is_initiator)
1745 vec_free (sa->r_id.data);
1746 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1747 sa->r_id.type = sel_p->loc_id.type;
1748 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1749 sa->i_id.type = sel_p->rem_id.type;
1751 /* generate our auth data */
1752 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1753 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1755 vec_free (sa->r_auth.data);
1756 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1757 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1758 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1761 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1763 vec_free (sa->r_auth.data);
1764 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1765 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1769 /* select transforms for 1st child sa */
1770 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1771 sa->childs[0].r_proposals =
1772 ikev2_select_proposal (sa->childs[0].i_proposals,
1773 IKEV2_PROTOCOL_ESP);
1775 if (~0 != sel_p->tun_itf)
1777 sa->is_tun_itf_set = 1;
1778 sa->tun_itf = sel_p->tun_itf;
1784 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1785 "profile found! ispi %lx", sa->ispi);
1786 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1792 ikev2_sa_auth_init (ikev2_sa_t * sa)
1794 ikev2_main_t *km = &ikev2_main;
1795 u8 *authmsg, *key_pad, *psk = 0;
1796 ikev2_sa_transform_t *tr_prf;
1799 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1801 /* only shared key and rsa signature */
1802 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1803 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1805 ikev2_elog_uint (IKEV2_LOG_ERROR,
1806 "unsupported authentication method %u",
1808 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1812 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1814 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1816 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1817 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1818 vec_free (sa->i_auth.data);
1819 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1820 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1824 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1826 vec_free (sa->i_auth.data);
1827 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1828 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1834 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1836 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1840 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1842 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1852 ipsec_sa_flags_t flags;
1855 ipsec_crypto_alg_t encr_type;
1856 ipsec_integ_alg_t integ_type;
1857 ip_address_t local_ip;
1858 ip_address_t remote_ip;
1859 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1861 u32 old_remote_sa_id;
1862 u16 ipsec_over_udp_port;
1865 } ikev2_add_ipsec_tunnel_args_t;
1868 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1870 ikev2_main_t *km = &ikev2_main;
1874 .t_flags = TUNNEL_FLAG_NONE,
1875 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1877 .t_mode = TUNNEL_MODE_P2P,
1880 .t_src = a->local_ip,
1881 .t_dst = a->remote_ip,
1883 tunnel_t tun_out = {
1884 .t_flags = TUNNEL_FLAG_NONE,
1885 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1887 .t_mode = TUNNEL_MODE_P2P,
1890 .t_src = a->remote_ip,
1891 .t_dst = a->local_ip,
1894 if (~0 == a->sw_if_index)
1896 /* no tunnel associated with the SA/profile - create a new one */
1897 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1898 &ip_addr_46 (&a->remote_ip), 0,
1899 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1900 TUNNEL_MODE_P2P, &sw_if_index);
1902 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1904 if (hash_get (km->sw_if_indices, sw_if_index))
1905 /* interface is managed by IKE; proceed with updating SAs */
1908 hash_set1 (km->sw_if_indices, sw_if_index);
1912 sw_if_index = a->sw_if_index;
1913 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1918 ikev2_elog_uint (IKEV2_LOG_ERROR,
1919 "installing ipip tunnel failed! local spi: %x",
1925 vec_add1 (sas_in, a->remote_sa_id);
1928 ipsec_tun_protect_del (sw_if_index, NULL);
1930 /* replace local SA immediately */
1931 ipsec_sa_unlock_id (a->local_sa_id);
1933 /* keep the old sa */
1934 vec_add1 (sas_in, a->old_remote_sa_id);
1937 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1938 a->encr_type, &a->loc_ckey, a->integ_type,
1939 &a->loc_ikey, a->flags, a->salt_local,
1940 a->src_port, a->dst_port, &tun_out, NULL);
1944 rv = ipsec_sa_add_and_lock (
1945 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1946 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1947 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1948 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
1952 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1959 ipsec_sa_unlock_id (a->remote_sa_id);
1961 ipsec_sa_unlock_id (a->local_sa_id);
1967 ikev2_create_tunnel_interface (vlib_main_t * vm,
1969 ikev2_child_sa_t * child, u32 sa_index,
1970 u32 child_index, u8 is_rekey)
1972 u32 thread_index = vlib_get_thread_index ();
1973 ikev2_main_t *km = &ikev2_main;
1974 ipsec_crypto_alg_t encr_type;
1975 ipsec_integ_alg_t integ_type;
1976 ikev2_profile_t *p = 0;
1977 ikev2_sa_transform_t *tr;
1978 ikev2_sa_proposal_t *proposals;
1980 ikev2_add_ipsec_tunnel_args_t a;
1982 clib_memset (&a, 0, sizeof (a));
1984 if (!child->r_proposals)
1986 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1990 if (sa->is_initiator)
1992 ip_address_copy (&a.local_ip, &sa->iaddr);
1993 ip_address_copy (&a.remote_ip, &sa->raddr);
1994 proposals = child->r_proposals;
1995 a.local_spi = child->r_proposals[0].spi;
1996 a.remote_spi = child->i_proposals[0].spi;
2000 ip_address_copy (&a.local_ip, &sa->raddr);
2001 ip_address_copy (&a.remote_ip, &sa->iaddr);
2002 proposals = child->i_proposals;
2003 a.local_spi = child->i_proposals[0].spi;
2004 a.remote_spi = child->r_proposals[0].spi;
2007 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
2010 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
2011 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2013 if (ikev2_natt_active (sa))
2014 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2015 a.is_rekey = is_rekey;
2017 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2018 if (tr && tr->esn_type)
2019 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2021 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2024 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2026 switch (tr->key_len)
2029 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2032 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2035 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2038 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2043 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2046 switch (tr->key_len)
2049 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2052 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2055 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2058 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2066 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2072 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2075 a.encr_type = encr_type;
2079 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2082 switch (tr->integ_type)
2084 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2085 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2087 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2088 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2090 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2091 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2093 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2094 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2097 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2103 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2109 integ_type = IPSEC_INTEG_ALG_NONE;
2112 a.integ_type = integ_type;
2113 ikev2_calc_child_keys (sa, child);
2115 if (sa->is_initiator)
2117 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2118 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2119 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2120 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2123 a.salt_remote = child->salt_er;
2124 a.salt_local = child->salt_ei;
2126 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2130 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2131 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2132 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2133 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2136 a.salt_remote = child->salt_ei;
2137 a.salt_local = child->salt_er;
2140 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2141 a.src_port = sa->ipsec_over_udp_port;
2144 if (sa->is_initiator && sa->profile_index != ~0)
2145 p = pool_elt_at_index (km->profiles, sa->profile_index);
2147 if (p && p->lifetime)
2149 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2150 if (p->lifetime_jitter)
2152 // This is not much better than rand(3), which Coverity warns
2153 // is unsuitable for security applications; random_u32 is
2154 // however fast. If this perturbance to the expiration time
2155 // needs to use a better RNG then we may need to use something
2156 // like /dev/urandom which has significant overhead.
2157 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2158 rnd = random_u32 (&rnd);
2160 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2164 if (thread_index & 0xffffffc0)
2165 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2167 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2168 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2170 child->local_sa_id =
2172 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2174 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2179 /* create a new remote SA ID to keep the old SA for a bit longer
2180 * so the peer has some time to swap their SAs */
2182 /* use most significat bit of child index part in id */
2184 if (sa->current_remote_id_mask)
2186 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2187 sa->current_remote_id_mask = 0;
2191 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2192 sa->current_remote_id_mask = mask;
2193 remote_sa_id |= mask;
2195 sa->old_id_expiration = 3.0;
2196 sa->old_remote_id_present = 1;
2199 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2201 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2202 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2204 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2205 (u8 *) & a, sizeof (a));
2211 ip46_address_t local_ip;
2212 ip46_address_t remote_ip;
2216 } ikev2_del_ipsec_tunnel_args_t;
2219 ikev2_flip_alternate_sa_bit (u32 id)
2228 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2230 ikev2_main_t *km = &ikev2_main;
2231 ipip_tunnel_t *ipip = NULL;
2234 if (~0 == a->sw_if_index)
2237 ipip_tunnel_key_t key = {
2239 .dst = a->remote_ip,
2240 .transport = IPIP_TRANSPORT_IP4,
2245 ipip = ipip_tunnel_db_find (&key);
2249 sw_if_index = ipip->sw_if_index;
2250 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2257 sw_if_index = a->sw_if_index;
2258 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2261 if (~0 != sw_if_index)
2262 ipsec_tun_protect_del (sw_if_index, NULL);
2264 ipsec_sa_unlock_id (a->remote_sa_id);
2265 ipsec_sa_unlock_id (a->local_sa_id);
2266 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2269 ipip_del_tunnel (ipip->sw_if_index);
2273 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2274 ikev2_child_sa_t * child)
2276 ikev2_del_ipsec_tunnel_args_t a;
2278 clib_memset (&a, 0, sizeof (a));
2280 if (sa->is_initiator)
2282 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2283 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2287 ip_address_to_46 (&sa->raddr, &a.local_ip);
2288 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2291 a.remote_sa_id = child->remote_sa_id;
2292 a.local_sa_id = child->local_sa_id;
2293 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2295 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2301 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2302 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2304 ikev2_main_t *km = &ikev2_main;
2305 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2307 ike_payload_header_t *ph;
2311 ikev2_sa_transform_t *tr_encr, *tr_integ;
2313 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2315 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2317 ikev2_payload_chain_t *chain = 0;
2318 ikev2_payload_new_chain (chain);
2320 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2322 if (sa->r_proposals == 0)
2324 ikev2_payload_add_notify (chain,
2325 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2326 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2328 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2330 u8 *data = vec_new (u8, 2);
2331 ikev2_sa_transform_t *tr_dh;
2333 ikev2_sa_get_td_for_type (sa->r_proposals,
2334 IKEV2_TRANSFORM_TYPE_DH);
2335 ASSERT (tr_dh && tr_dh->dh_type);
2337 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2338 data[1] = (tr_dh->dh_type) & 0xff;
2340 ikev2_payload_add_notify (chain,
2341 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2344 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2346 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2348 u8 *data = vec_new (u8, 1);
2350 data[0] = sa->unsupported_cp;
2351 ikev2_payload_add_notify (chain,
2352 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2360 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2361 ikev2_payload_add_sa (chain, sa->r_proposals);
2362 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2363 ikev2_payload_add_nonce (chain, sa->r_nonce);
2365 u8 *nat_detection_sha1 =
2366 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2367 clib_host_to_net_u64 (sa->rspi),
2368 &sa->raddr, udp->dst_port);
2369 ikev2_payload_add_notify (chain,
2370 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2371 nat_detection_sha1);
2372 vec_free (nat_detection_sha1);
2373 nat_detection_sha1 =
2374 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2375 clib_host_to_net_u64 (sa->rspi),
2376 &sa->iaddr, udp->src_port);
2377 ikev2_payload_add_notify (chain,
2378 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2379 nat_detection_sha1);
2380 vec_free (nat_detection_sha1);
2383 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2385 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2387 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2388 ikev2_payload_add_auth (chain, &sa->r_auth);
2389 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2390 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2391 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2393 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2395 ikev2_payload_add_notify (chain,
2396 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2398 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2400 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2402 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2404 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2405 ikev2_payload_add_auth (chain, &sa->r_auth);
2407 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2409 ikev2_payload_add_notify (chain,
2410 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2411 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2412 ikev2_payload_add_auth (chain, &sa->r_auth);
2413 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2414 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2416 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2418 u8 *data = vec_new (u8, 1);
2420 data[0] = sa->unsupported_cp;
2421 ikev2_payload_add_notify (chain,
2422 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2426 else if (sa->state == IKEV2_STATE_SA_INIT)
2428 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2429 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2430 ikev2_payload_add_auth (chain, &sa->i_auth);
2431 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2432 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2433 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2434 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2439 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2443 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2445 /* if pending delete */
2448 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2450 if (ike_hdr_is_request (ike))
2451 ikev2_payload_add_delete (chain, sa->del);
2453 /* The response to a request that deletes the IKE SA is an empty
2454 INFORMATIONAL response. */
2455 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2457 /* The response to a request that deletes ESP or AH SAs will contain
2458 delete payloads for the paired SAs going in the other direction. */
2461 ikev2_payload_add_delete (chain, sa->del);
2466 /* received N(AUTHENTICATION_FAILED) */
2467 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2469 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2472 /* received unsupported critical payload */
2473 else if (sa->unsupported_cp)
2475 u8 *data = vec_new (u8, 1);
2477 data[0] = sa->unsupported_cp;
2478 ikev2_payload_add_notify (chain,
2479 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2482 sa->unsupported_cp = 0;
2485 /* else send empty response */
2487 if (ike_hdr_is_response (ike))
2489 ASSERT (stats != 0);
2490 stats->n_keepalives++;
2491 sa->stats.n_keepalives++;
2495 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2497 if (sa->is_initiator)
2500 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2501 ikev2_notify_t notify;
2502 u8 *data = vec_new (u8, 4);
2503 clib_memset (¬ify, 0, sizeof (notify));
2504 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2505 notify.spi = sa->childs[0].i_proposals->spi;
2506 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2508 ikev2_payload_add_sa (chain, proposals);
2509 ikev2_payload_add_nonce (chain, sa->i_nonce);
2510 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2511 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2512 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2517 else if (vec_len (sa->rekey) > 0)
2519 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2520 ikev2_payload_add_nonce (chain, sa->r_nonce);
2521 ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
2522 ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
2523 vec_del1 (sa->rekey, 0);
2525 else if (vec_len (sa->new_child) > 0)
2527 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2528 ikev2_payload_add_nonce (chain, sa->r_nonce);
2529 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2531 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2533 vec_del1 (sa->new_child, 0);
2535 else if (sa->unsupported_cp)
2537 u8 *data = vec_new (u8, 1);
2539 data[0] = sa->unsupported_cp;
2540 ikev2_payload_add_notify (
2541 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2543 sa->unsupported_cp = 0;
2547 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2553 ike->version = IKE_VERSION_2;
2554 ike->nextpayload = IKEV2_PAYLOAD_SK;
2555 tlen = sizeof (*ike);
2557 if (sa->is_initiator)
2558 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2560 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2562 tlen += vec_len (chain->data);
2563 ike->nextpayload = chain->first_payload_type;
2564 ike->length = clib_host_to_net_u32 (tlen);
2566 if (tlen + b->current_length + b->current_data > buffer_data_size)
2572 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2574 /* store whole IKE payload - needed for PSK auth */
2575 vec_reset_length (sa->last_sa_init_res_packet_data);
2576 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2580 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2581 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2584 plen = sizeof (*ph);
2585 ph = (ike_payload_header_t *) & ike->payload[0];
2586 ph->nextpayload = chain->first_payload_type;
2589 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2590 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2591 plen += vec_len (chain->data) + iv_len;
2593 /* add space for hmac/tag */
2595 plen += tr_integ->key_trunc;
2597 plen += IKEV2_GCM_ICV_SIZE;
2600 if (tlen + b->current_length + b->current_data > buffer_data_size)
2606 /* payload and total length */
2607 ph->length = clib_host_to_net_u16 (plen);
2608 ike->length = clib_host_to_net_u32 (tlen);
2612 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2613 ph->payload, (u8 *) ike,
2614 sizeof (*ike) + sizeof (*ph),
2615 ph->payload + plen - sizeof (*ph) -
2616 IKEV2_GCM_ICV_SIZE))
2624 if (!ikev2_encrypt_data
2625 (ptd, sa, tr_encr, chain->data, ph->payload))
2631 ikev2_calc_integr (tr_integ,
2632 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2633 (u8 *) ike, tlen - tr_integ->key_trunc);
2634 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2635 sizeof (*ike), integ, tr_integ->key_trunc);
2638 /* store whole IKE payload - needed for retransmit */
2639 vec_reset_length (sa->last_res_packet_data);
2640 vec_add (sa->last_res_packet_data, ike, tlen);
2644 ikev2_payload_destroy_chain (chain);
2650 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2651 ip_address_t iaddr, ip_address_t raddr,
2656 u8 payload = ike->nextpayload;
2658 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2659 ip_address_cmp (&sa->iaddr, &iaddr) ||
2660 ip_address_cmp (&sa->raddr, &raddr))
2665 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2667 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2668 u32 plen = clib_net_to_host_u16 (ikep->length);
2670 if (plen < sizeof (ike_payload_header_t))
2673 if (payload == IKEV2_PAYLOAD_NONCE &&
2674 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2676 /* req is retransmit */
2677 if (sa->state == IKEV2_STATE_SA_INIT)
2679 sa->stats.n_init_retransmit++;
2680 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2681 u32 slen = clib_net_to_host_u32 (tmp->length);
2682 ike->ispi = tmp->ispi;
2683 ike->rspi = tmp->rspi;
2684 ike->nextpayload = tmp->nextpayload;
2685 ike->version = tmp->version;
2686 ike->exchange = tmp->exchange;
2687 ike->flags = tmp->flags;
2688 ike->msgid = tmp->msgid;
2689 ike->length = tmp->length;
2690 clib_memcpy_fast (ike->payload, tmp->payload,
2691 slen - sizeof (*ike));
2692 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2693 "ispi %lx IKE_SA_INIT retransmit "
2694 "from %d.%d.%d.%d to %d.%d.%d.%d",
2696 ip_addr_v4 (&raddr).as_u32,
2697 ip_addr_v4 (&iaddr).as_u32);
2700 /* else ignore req */
2703 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2704 "ispi %lx IKE_SA_INIT ignore "
2705 "from %d.%d.%d.%d to %d.%d.%d.%d",
2707 ip_addr_v4 (&raddr).as_u32,
2708 ip_addr_v4 (&iaddr).as_u32);
2712 payload = ikep->nextpayload;
2720 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2721 ip_address_t raddr, u32 rlen)
2725 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2728 pool_foreach (sa, ptd->sas) {
2729 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2735 /* req is not retransmit */
2740 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2742 if (ike_hdr_is_response (ike))
2745 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2748 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2750 sa->last_msg_id = msg_id;
2754 /* retransmitted req */
2755 if (msg_id == sa->last_msg_id)
2757 sa->stats.n_retransmit++;
2758 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2759 u32 slen = clib_net_to_host_u32 (tmp->length);
2760 ike->ispi = tmp->ispi;
2761 ike->rspi = tmp->rspi;
2762 ike->nextpayload = tmp->nextpayload;
2763 ike->version = tmp->version;
2764 ike->exchange = tmp->exchange;
2765 ike->flags = tmp->flags;
2766 ike->msgid = tmp->msgid;
2767 ike->length = tmp->length;
2768 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2769 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2770 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2771 ip_addr_v4 (&sa->iaddr).as_u32);
2775 /* old req ignore */
2776 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2777 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2778 ip_addr_v4 (&sa->iaddr).as_u32);
2783 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2785 ikev2_main_t *km = &ikev2_main;
2786 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2787 sa->profile_index = ~0;
2791 ikev2_del_sa_init_from_main (u64 * ispi)
2793 ikev2_main_t *km = &ikev2_main;
2794 uword *p = hash_get (km->sa_by_ispi, *ispi);
2797 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2798 hash_unset (km->sa_by_ispi, sai->ispi);
2799 ikev2_sa_free_all_vec (sai);
2800 pool_put (km->sais, sai);
2805 ikev2_del_sa_init (u64 ispi)
2807 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2812 ikev2_rewrite_v6_addrs (ikev2_sa_t *sa, ip6_header_t *ih)
2814 if (sa->is_initiator)
2816 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2817 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2821 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2822 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2827 ikev2_rewrite_v4_addrs (ikev2_sa_t *sa, ip4_header_t *ih)
2829 if (sa->is_initiator)
2831 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2832 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2836 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2837 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2842 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2843 const ip_address_family_t af)
2845 ip_address_set (&sa->raddr, raddr, af);
2846 ip_address_set (&sa->iaddr, iaddr, af);
2850 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2851 ip6_header_t * ip6, u8 is_ip4)
2856 src = ip4->src_address.as_u32;
2857 dst = ip4->dst_address.as_u32;
2861 src = ip6->src_address.as_u32[3];
2862 dst = ip6->dst_address.as_u32[3];
2864 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2865 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2866 exchange, src, dst);
2870 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2872 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2874 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2877 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2878 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2879 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2880 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2884 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2886 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2888 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2890 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2892 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2897 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2898 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2900 u32 n_left = frame->n_vectors, *from;
2901 ikev2_main_t *km = &ikev2_main;
2902 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2903 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2904 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2905 ikev2_stats_t _stats, *stats = &_stats;
2908 /* no NAT traversal for ip6 */
2909 ASSERT (!natt || is_ip4);
2911 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2912 from = vlib_frame_vector_args (frame);
2913 vlib_get_buffers (vm, from, bufs, n_left);
2918 vlib_buffer_t *b0 = b[0];
2919 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2920 : IKEV2_NEXT_IP6_ERROR_DROP;
2921 ip4_header_t *ip40 = 0;
2922 ip6_header_t *ip60 = 0;
2925 ikev2_sa_t *sa0 = 0;
2926 ikev2_sa_t sa; /* temporary store for SA */
2933 u8 *ptr = vlib_buffer_get_current (b0);
2934 ip40 = (ip4_header_t *) ptr;
2935 ptr += sizeof (*ip40);
2936 udp0 = (udp_header_t *) ptr;
2937 ptr += sizeof (*udp0);
2938 ike0 = (ike_header_t *) ptr;
2939 ip_hdr_sz = sizeof (*ip40);
2943 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2944 ike0 = vlib_buffer_get_current (b0);
2945 vlib_buffer_advance (b0, -sizeof (*udp0));
2946 udp0 = vlib_buffer_get_current (b0);
2950 ip40 = (ip4_header_t *) ipx_hdr;
2951 ip_hdr_sz = sizeof (*ip40);
2955 ip60 = (ip6_header_t *) ipx_hdr;
2956 ip_hdr_sz = sizeof (*ip60);
2958 vlib_buffer_advance (b0, -ip_hdr_sz);
2961 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2963 /* check for non-esp marker */
2966 ASSERT (*((u32 *) ike0) == 0);
2968 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2969 rlen -= sizeof (ikev2_non_esp_marker);
2972 if (clib_net_to_host_u32 (ike0->length) != rlen)
2974 vlib_node_increment_counter (vm, node->node_index,
2975 IKEV2_ERROR_BAD_LENGTH, 1);
2979 if (ike0->version != IKE_VERSION_2)
2981 vlib_node_increment_counter (vm, node->node_index,
2982 IKEV2_ERROR_NOT_IKEV2, 1);
2986 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2989 clib_memset (sa0, 0, sizeof (*sa0));
2991 if (ike_hdr_is_initiator (ike0))
2993 sa0->stats.n_sa_init_req++;
2994 stats->n_sa_init_req++;
2995 if (ike0->rspi == 0)
2998 ikev2_set_ip_address (sa0, &ip40->src_address,
2999 &ip40->dst_address, AF_IP4);
3001 ikev2_set_ip_address (sa0, &ip60->src_address,
3002 &ip60->dst_address, AF_IP6);
3004 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3007 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
3011 vlib_node_increment_counter (vm, node->node_index,
3014 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3016 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3021 res = ikev2_process_sa_init_req (
3022 vm, sa0, ike0, udp0, rlen,
3023 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3025 vlib_node_increment_counter (vm, node->node_index,
3026 IKEV2_ERROR_MALFORMED_PACKET,
3029 if (sa0->state == IKEV2_STATE_SA_INIT)
3031 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3033 ikev2_select_proposal (sa0->i_proposals,
3034 IKEV2_PROTOCOL_IKE);
3035 ikev2_generate_sa_init_data_and_log (sa0);
3038 if (sa0->state == IKEV2_STATE_SA_INIT
3039 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3041 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3043 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3045 vlib_node_increment_counter (vm, node->node_index,
3046 IKEV2_ERROR_NO_BUFF_SPACE,
3050 if (sa0->state == IKEV2_STATE_SA_INIT)
3052 /* add SA to the pool */
3053 pool_get (ptd->sas, sa0);
3054 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3055 ikev2_init_sa (vm, sa0);
3056 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3060 ikev2_sa_free_all_vec (sa0);
3064 else //received sa_init without initiator flag
3067 ikev2_set_ip_address (sa0, &ip40->dst_address,
3068 &ip40->src_address, AF_IP4);
3070 ikev2_set_ip_address (sa0, &ip60->dst_address,
3071 &ip60->src_address, AF_IP6);
3073 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3075 if (sa0->state == IKEV2_STATE_SA_INIT)
3078 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3079 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3082 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3084 if (clib_atomic_bool_cmp_and_swap
3085 (&sai->init_response_received, 0, 1))
3087 ikev2_complete_sa_data (sa0, sai);
3088 ikev2_calc_keys (sa0);
3089 ikev2_sa_auth_init (sa0);
3090 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3092 clib_net_to_host_u32 (sai->last_init_msg_id);
3093 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3094 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3097 vlib_node_increment_counter (vm,
3099 IKEV2_ERROR_NO_BUFF_SPACE,
3104 /* we've already processed sa-init response */
3105 sa0->state = IKEV2_STATE_UNKNOWN;
3110 if (sa0->state == IKEV2_STATE_SA_INIT)
3112 /* add SA to the pool */
3113 pool_get (ptd->sas, sa0);
3114 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3115 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3119 ikev2_sa_free_all_vec (sa0);
3123 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3126 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3129 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3130 slen = ikev2_retransmit_resp (sa0, ike0);
3133 vlib_node_increment_counter (vm, node->node_index,
3136 IKEV2_ERROR_IKE_REQ_IGNORE
3138 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3143 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3144 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3146 ikev2_sa_auth (sa0);
3148 vlib_node_increment_counter (vm, node->node_index,
3149 IKEV2_ERROR_MALFORMED_PACKET, 1);
3150 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3152 ikev2_initial_contact_cleanup (ptd, sa0);
3153 ikev2_sa_match_ts (sa0);
3154 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3155 ikev2_create_tunnel_interface (vm, sa0,
3160 if (sa0->is_initiator)
3162 sa0->last_msg_id = ~0;
3163 ikev2_del_sa_init (sa0->ispi);
3167 sa0->stats.n_sa_auth_req++;
3168 stats->n_sa_auth_req++;
3169 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3171 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3173 vlib_node_increment_counter (vm, node->node_index,
3174 IKEV2_ERROR_NO_BUFF_SPACE,
3179 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3182 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3185 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3186 slen = ikev2_retransmit_resp (sa0, ike0);
3189 vlib_node_increment_counter (vm, node->node_index,
3192 IKEV2_ERROR_IKE_REQ_IGNORE
3194 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3199 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3202 vlib_node_increment_counter (vm, node->node_index,
3203 IKEV2_ERROR_MALFORMED_PACKET,
3211 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3213 ikev2_delete_t *d, *tmp, *resp = 0;
3214 vec_foreach (d, sa0->del)
3216 ikev2_child_sa_t *ch_sa;
3217 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3219 !sa0->is_initiator);
3222 ikev2_delete_tunnel_interface (km->vnet_main,
3224 if (!sa0->is_initiator)
3226 vec_add2 (resp, tmp, 1);
3227 tmp->protocol_id = d->protocol_id;
3228 tmp->spi = ch_sa->r_proposals[0].spi;
3230 ikev2_sa_del_child_sa (sa0, ch_sa);
3233 if (!sa0->is_initiator)
3235 vec_free (sa0->del);
3240 if (ike_hdr_is_request (ike0))
3242 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3244 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3246 vlib_node_increment_counter (vm, node->node_index,
3247 IKEV2_ERROR_NO_BUFF_SPACE,
3252 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3255 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3258 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3259 slen = ikev2_retransmit_resp (sa0, ike0);
3262 vlib_node_increment_counter (vm, node->node_index,
3265 IKEV2_ERROR_IKE_REQ_IGNORE
3267 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3272 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3275 vlib_node_increment_counter (vm, node->node_index,
3276 IKEV2_ERROR_MALFORMED_PACKET,
3284 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3287 ikev2_sa_free_all_child_sa (&sa0->childs);
3288 ikev2_child_sa_t *child;
3289 vec_add2 (sa0->childs, child, 1);
3290 clib_memset (child, 0, sizeof (*child));
3291 child->r_proposals = sa0->rekey[0].r_proposal;
3292 child->i_proposals = sa0->rekey[0].i_proposal;
3293 child->tsi = sa0->rekey[0].tsi;
3294 child->tsr = sa0->rekey[0].tsr;
3295 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3296 child - sa0->childs, 1);
3298 if (ike_hdr_is_response (ike0))
3300 vec_free (sa0->rekey);
3304 stats->n_rekey_req++;
3305 sa0->stats.n_rekey_req++;
3306 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3308 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3310 vlib_node_increment_counter (vm, node->node_index,
3311 IKEV2_ERROR_NO_BUFF_SPACE,
3315 else if (sa0->new_child)
3317 ikev2_child_sa_t *c;
3318 vec_add2 (sa0->childs, c, 1);
3319 memset (c, 0, sizeof (*c));
3320 c->r_proposals = sa0->new_child[0].r_proposal;
3321 c->i_proposals = sa0->new_child[0].i_proposal;
3322 c->tsi = sa0->new_child[0].tsi;
3323 c->tsr = sa0->new_child[0].tsr;
3324 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3325 c - sa0->childs, 0);
3326 if (ike_hdr_is_request (ike0))
3328 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3330 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3332 vlib_node_increment_counter (
3333 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3340 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3344 /* if we are sending packet back, rewrite headers */
3345 if (slen && ~0 != slen)
3349 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3350 ikev2_rewrite_v4_addrs (sa0, ip40);
3354 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3355 ikev2_rewrite_v6_addrs (sa0, ip60);
3360 udp0->dst_port = udp0->src_port =
3361 clib_net_to_host_u16 (ikev2_get_port (sa0));
3363 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3364 && ikev2_natt_active (sa0))
3367 slen = ikev2_insert_non_esp_marker (ike0, slen);
3373 slen += sizeof (ikev2_non_esp_marker);
3375 u16 tp = udp0->dst_port;
3376 udp0->dst_port = udp0->src_port;
3377 udp0->src_port = tp;
3380 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3382 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3385 ip40->length = clib_host_to_net_u16 (b0->current_length);
3386 ip40->checksum = ip4_header_checksum (ip40);
3390 ip60->payload_length =
3391 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3395 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3396 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3398 ikev2_child_sa_t *c;
3400 vec_foreach (c, sa0->childs)
3401 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3403 ikev2_delete_sa (ptd, sa0);
3405 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3406 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3409 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3410 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3411 t->next_index = next[0];
3418 ikev2_update_stats (vm, node->node_index, stats);
3419 vlib_node_increment_counter (vm, node->node_index,
3420 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3421 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3422 return frame->n_vectors;
3426 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3428 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3432 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3433 vlib_frame_t *frame)
3435 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3439 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3441 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3445 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3446 .function = ikev2_ip4,
3447 .name = "ikev2-ip4",
3448 .vector_size = sizeof (u32),
3449 .format_trace = format_ikev2_trace,
3450 .type = VLIB_NODE_TYPE_INTERNAL,
3452 .n_errors = IKEV2_N_ERROR,
3453 .error_counters = ikev2_error_counters,
3455 .n_next_nodes = IKEV2_IP4_N_NEXT,
3457 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3458 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3462 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3463 .function = ikev2_ip4_natt,
3464 .name = "ikev2-ip4-natt",
3465 .vector_size = sizeof (u32),
3466 .format_trace = format_ikev2_trace,
3467 .type = VLIB_NODE_TYPE_INTERNAL,
3469 .n_errors = IKEV2_N_ERROR,
3470 .error_counters = ikev2_error_counters,
3472 .n_next_nodes = IKEV2_IP4_N_NEXT,
3474 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3475 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3479 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3480 .function = ikev2_ip6,
3481 .name = "ikev2-ip6",
3482 .vector_size = sizeof (u32),
3483 .format_trace = format_ikev2_trace,
3484 .type = VLIB_NODE_TYPE_INTERNAL,
3486 .n_errors = IKEV2_N_ERROR,
3487 .error_counters = ikev2_error_counters,
3489 .n_next_nodes = IKEV2_IP6_N_NEXT,
3491 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3492 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3497 // set ikev2 proposals when vpp is used as initiator
3498 static clib_error_t *
3499 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3500 ikev2_transforms_set * ts,
3501 ikev2_sa_proposal_t ** proposals, int is_ike)
3504 ikev2_main_t *km = &ikev2_main;
3505 ikev2_sa_proposal_t *proposal;
3506 vec_add2 (*proposals, proposal, 1);
3507 ikev2_sa_transform_t *td;
3512 vec_foreach (td, km->supported_transforms)
3514 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3515 && td->encr_type == ts->crypto_alg
3516 && td->key_len == ts->crypto_key_size / 8)
3519 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3520 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3521 vec_add (td->attrs, (u8 *) attr, 4);
3522 vec_add1 (proposal->transforms, *td);
3531 r = clib_error_return (0, "Unsupported algorithm");
3535 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3539 vec_foreach (td, km->supported_transforms)
3541 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3542 && td->integ_type == ts->integ_alg)
3544 vec_add1 (proposal->transforms, *td);
3552 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3553 r = clib_error_return (0, "Unsupported algorithm");
3562 vec_foreach (td, km->supported_transforms)
3564 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3565 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3567 vec_add1 (proposal->transforms, *td);
3574 r = clib_error_return (0, "Unsupported algorithm");
3583 vec_foreach (td, km->supported_transforms)
3585 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3587 vec_add1 (proposal->transforms, *td);
3590 sa->dh_group = td->dh_type;
3598 r = clib_error_return (0, "Unsupported algorithm");
3606 vec_foreach (td, km->supported_transforms)
3608 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3610 vec_add1 (proposal->transforms, *td);
3616 r = clib_error_return (0, "Unsupported algorithm");
3625 static ikev2_profile_t *
3626 ikev2_profile_index_by_name (u8 * name)
3628 ikev2_main_t *km = &ikev2_main;
3631 p = mhash_get (&km->profile_index_by_name, name);
3635 return pool_elt_at_index (km->profiles, p[0]);
3640 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3641 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3650 b0 = vlib_get_buffer (vm, bi0);
3651 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3652 udp0 = vlib_buffer_get_current (b0);
3653 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3654 udp0->src_port = clib_host_to_net_u16 (src_port);
3655 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3658 if (ip_addr_version (dst) == AF_IP4)
3660 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3661 ip40 = vlib_buffer_get_current (b0);
3662 ip40->ip_version_and_header_length = 0x45;
3664 ip40->fragment_id = 0;
3665 ip40->flags_and_fragment_offset = 0;
3667 ip40->protocol = IP_PROTOCOL_UDP;
3668 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3669 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3670 b0->current_length =
3671 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3672 ip40->length = clib_host_to_net_u16 (b0->current_length);
3673 ip40->checksum = ip4_header_checksum (ip40);
3677 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3678 ip60 = vlib_buffer_get_current (b0);
3680 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3681 ip60->ip_version_traffic_class_and_flow_label =
3682 clib_host_to_net_u32 (0x6 << 28);
3683 ip60->payload_length =
3684 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3685 ip60->protocol = IP_PROTOCOL_UDP;
3686 ip60->hop_limit = 0xff;
3687 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3688 sizeof (ip60->src_address));
3689 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3690 sizeof (ip60->src_address));
3693 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3694 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3695 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3697 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3698 ip4_lookup_node.index : ip6_lookup_node.index;
3700 /* send the request */
3701 f = vlib_get_frame_to_node (vm, next_index);
3702 to_next = vlib_frame_vector_args (f);
3705 vlib_put_frame_to_node (vm, next_index, f);
3710 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3713 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3718 *b = vlib_get_buffer (vm, bi0);
3723 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3725 ikev2_main_t *km = &ikev2_main;
3728 EVP_PKEY_free (km->pkey);
3729 km->pkey = ikev2_load_key_file (file);
3730 if (km->pkey == NULL)
3731 return clib_error_return (0, "load key '%s' failed", file);
3736 static vnet_api_error_t
3737 ikev2_register_udp_port (ikev2_profile_t *p, u16 port)
3739 ipsec_register_udp_port (port);
3740 p->ipsec_over_udp_port = port;
3745 ikev2_unregister_udp_port (ikev2_profile_t *p)
3747 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3750 ipsec_unregister_udp_port (p->ipsec_over_udp_port);
3751 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3755 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3756 ikev2_main_per_thread_data_t * tkm,
3757 ikev2_sa_t * sa, u8 send_notification)
3759 ikev2_main_t *km = &ikev2_main;
3760 ip_address_t *src, *dst;
3762 ikev2_child_sa_t *c;
3764 /* Create the Initiator notification for IKE SA removal */
3769 vec_resize (sa->del, 1);
3770 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3771 sa->del->spi = sa->ispi;
3773 if (send_notification)
3775 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3778 ikev2_log_error ("buffer alloc failure");
3782 ike0 = vlib_buffer_get_current (b0);
3783 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3784 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3785 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3787 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3788 sa->last_init_msg_id += 1;
3789 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3793 if (ikev2_natt_active (sa))
3794 len = ikev2_insert_non_esp_marker (ike0, len);
3796 if (sa->is_initiator)
3807 ikev2_send_ike (vm, src, dst, bi0, len,
3808 ikev2_get_port (sa), sa->dst_port, 0);
3812 /* delete local SA */
3813 vec_foreach (c, sa->childs)
3814 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3816 u64 rspi = sa->rspi;
3817 ikev2_sa_free_all_vec (sa);
3818 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3821 hash_unset (tkm->sa_by_rspi, rspi);
3822 pool_put (tkm->sas, sa);
3827 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3829 ikev2_main_per_thread_data_t *tkm;
3831 u32 pi = p - km->profiles;
3836 pool_foreach (sa, km->sais) {
3837 if (pi == sa->profile_index)
3838 vec_add1 (del_sai, sa - km->sais);
3842 vec_foreach (sai, del_sai)
3844 sa = pool_elt_at_index (km->sais, sai[0]);
3845 ikev2_sa_free_all_vec (sa);
3846 hash_unset (km->sa_by_ispi, sa->ispi);
3847 pool_put (km->sais, sa);
3849 vec_reset_length (del_sai);
3851 vec_foreach (tkm, km->per_thread_data)
3854 pool_foreach (sa, tkm->sas) {
3855 if (sa->profile_index != ~0 && pi == sa->profile_index)
3856 vec_add1 (del_sai, sa - tkm->sas);
3860 vec_foreach (sai, del_sai)
3862 sa = pool_elt_at_index (tkm->sas, sai[0]);
3863 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3866 vec_reset_length (del_sai);
3873 ikev2_profile_responder_free (ikev2_responder_t *r)
3875 vec_free (r->hostname);
3879 ikev2_profile_free (ikev2_profile_t * p)
3883 vec_free (p->auth.data);
3885 EVP_PKEY_free (p->auth.key);
3887 ikev2_profile_responder_free (&p->responder);
3889 vec_free (p->loc_id.data);
3890 vec_free (p->rem_id.data);
3894 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3896 ikev2_main_t *km = &ikev2_main;
3901 if (ikev2_profile_index_by_name (name))
3902 return clib_error_return (0, "policy %v already exists", name);
3904 pool_get (km->profiles, p);
3905 clib_memset (p, 0, sizeof (*p));
3906 p->name = vec_dup (name);
3907 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3908 p->responder.sw_if_index = ~0;
3910 uword index = p - km->profiles;
3911 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3915 p = ikev2_profile_index_by_name (name);
3917 return clib_error_return (0, "policy %v does not exists", name);
3919 ikev2_unregister_udp_port (p);
3920 ikev2_cleanup_profile_sessions (km, p);
3922 ikev2_profile_free (p);
3923 pool_put (km->profiles, p);
3924 mhash_unset (&km->profile_index_by_name, name, 0);
3930 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3931 u8 * auth_data, u8 data_hex_format)
3936 p = ikev2_profile_index_by_name (name);
3940 r = clib_error_return (0, "unknown profile %v", name);
3945 EVP_PKEY_free (p->auth.key);
3946 vec_free (p->auth.data);
3948 p->auth.method = auth_method;
3949 p->auth.data = vec_dup (auth_data);
3950 p->auth.hex = data_hex_format;
3952 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3954 vec_add1 (p->auth.data, 0);
3955 p->auth.key = ikev2_load_cert_file (p->auth.data);
3956 if (p->auth.key == NULL)
3957 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3964 ikev2_is_id_supported (u8 id_type)
3966 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3967 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3968 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3969 id_type == IKEV2_ID_TYPE_ID_FQDN);
3973 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3979 if (!ikev2_is_id_supported (id_type))
3981 r = clib_error_return (0, "unsupported identity type %U",
3982 format_ikev2_id_type, id_type);
3986 p = ikev2_profile_index_by_name (name);
3990 r = clib_error_return (0, "unknown profile %v", name);
3996 vec_free (p->loc_id.data);
3997 p->loc_id.type = id_type;
3998 p->loc_id.data = vec_dup (data);
4002 vec_free (p->rem_id.data);
4003 p->rem_id.type = id_type;
4004 p->rem_id.data = vec_dup (data);
4011 ikev2_set_ts_type (ikev2_ts_t *ts, const ip_address_t *addr)
4013 if (ip_addr_version (addr) == AF_IP4)
4014 ts->ts_type = TS_IPV4_ADDR_RANGE;
4016 ts->ts_type = TS_IPV6_ADDR_RANGE;
4020 ikev2_set_ts_addrs (ikev2_ts_t *ts, const ip_address_t *start,
4021 const ip_address_t *end)
4023 ip_address_copy (&ts->start_addr, start);
4024 ip_address_copy (&ts->end_addr, end);
4028 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4029 u16 start_port, u16 end_port, ip_address_t start_addr,
4030 ip_address_t end_addr, int is_local)
4035 p = ikev2_profile_index_by_name (name);
4039 r = clib_error_return (0, "unknown profile %v", name);
4043 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4044 return clib_error_return (0, "IP address version mismatch!");
4048 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4049 p->loc_ts.start_port = start_port;
4050 p->loc_ts.end_port = end_port;
4051 p->loc_ts.protocol_id = protocol_id;
4052 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4056 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4057 p->rem_ts.start_port = start_port;
4058 p->rem_ts.end_port = end_port;
4059 p->rem_ts.protocol_id = protocol_id;
4060 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4067 ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname,
4073 p = ikev2_profile_index_by_name (name);
4077 r = clib_error_return (0, "unknown profile %v", name);
4081 p->responder.is_resolved = 0;
4082 p->responder.sw_if_index = sw_if_index;
4083 p->responder.hostname = vec_dup (hostname);
4089 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4090 u32 sw_if_index, ip_address_t addr)
4095 p = ikev2_profile_index_by_name (name);
4099 r = clib_error_return (0, "unknown profile %v", name);
4103 p->responder.is_resolved = 1;
4104 p->responder.sw_if_index = sw_if_index;
4105 ip_address_copy (&p->responder.addr, &addr);
4111 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4112 ikev2_transform_encr_type_t crypto_alg,
4113 ikev2_transform_integ_type_t integ_alg,
4114 ikev2_transform_dh_type_t dh_type,
4115 u32 crypto_key_size)
4119 p = ikev2_profile_index_by_name (name);
4121 return clib_error_return (0, "unknown profile %v", name);
4123 if ((IKEV2_TRANSFORM_INTEG_TYPE_NONE != integ_alg) +
4124 (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 == crypto_alg) !=
4126 return clib_error_return (0, "invalid cipher + integrity algorithm");
4128 p->ike_ts.crypto_alg = crypto_alg;
4129 p->ike_ts.integ_alg = integ_alg;
4130 p->ike_ts.dh_type = dh_type;
4131 p->ike_ts.crypto_key_size = crypto_key_size;
4136 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4137 ikev2_transform_encr_type_t crypto_alg,
4138 ikev2_transform_integ_type_t integ_alg,
4139 u32 crypto_key_size)
4144 p = ikev2_profile_index_by_name (name);
4148 r = clib_error_return (0, "unknown profile %v", name);
4152 p->esp_ts.crypto_alg = crypto_alg;
4153 p->esp_ts.integ_alg = integ_alg;
4154 p->esp_ts.crypto_key_size = crypto_key_size;
4159 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4160 u8 * name, u32 sw_if_index)
4165 p = ikev2_profile_index_by_name (name);
4169 r = clib_error_return (0, "unknown profile %v", name);
4173 p->tun_itf = sw_if_index;
4179 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4182 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4183 vnet_api_error_t rv = 0;
4186 return VNET_API_ERROR_INVALID_VALUE;
4190 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4191 return VNET_API_ERROR_VALUE_EXIST;
4193 rv = ikev2_register_udp_port (p, port);
4197 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4198 return VNET_API_ERROR_INVALID_VALUE;
4200 ikev2_unregister_udp_port (p);
4206 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4208 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4213 r = clib_error_return (0, "unknown profile %v", name);
4222 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4223 u64 lifetime, u32 jitter, u32 handover,
4229 p = ikev2_profile_index_by_name (name);
4233 r = clib_error_return (0, "unknown profile %v", name);
4237 p->lifetime = lifetime;
4238 p->lifetime_jitter = jitter;
4239 p->handover = handover;
4240 p->lifetime_maxdata = maxdata;
4245 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4246 ip_address_t * out_addr)
4248 ip4_address_t *if_ip4;
4249 ip6_address_t *if_ip6;
4253 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4256 ip_address_set (out_addr, if_ip4, AF_IP4);
4262 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4265 ip_address_set (out_addr, if_ip6, AF_IP6);
4272 static clib_error_t *
4273 ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r)
4275 ikev2_main_t *km = &ikev2_main;
4276 dns_cache_entry_t *ep = 0;
4277 dns_pending_request_t _t0, *t0 = &_t0;
4278 dns_resolve_name_t _rn, *rn = &_rn;
4282 if (!km->dns_resolve_name)
4283 return clib_error_return (0, "cannot load symbols from dns plugin");
4285 t0->request_type = DNS_API_PENDING_NAME_TO_IP;
4286 /* VPP main curse: IKEv2 uses only non-NULL terminated vectors internally
4287 * whereas DNS resolver expects a NULL-terminated C-string */
4288 name = vec_dup (r->hostname);
4289 vec_terminate_c_string (name);
4290 rv = km->dns_resolve_name (name, &ep, t0, rn);
4293 return clib_error_return (0, "dns lookup failure");
4298 ip_address_copy (&r->addr, &rn->address);
4304 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4308 ikev2_main_t *km = &ikev2_main;
4312 int len = sizeof (ike_header_t), valid_ip = 0;
4313 ip_address_t src_if_ip = ip_address_initializer;
4315 p = ikev2_profile_index_by_name (name);
4319 r = clib_error_return (0, "unknown profile %v", name);
4323 if (p->responder.sw_if_index == ~0 ||
4324 (ip_address_is_zero (&p->responder.addr) &&
4325 vec_len (p->responder.hostname) == 0))
4327 r = clib_error_return (0, "responder not set for profile %v", name);
4331 if (!p->responder.is_resolved)
4333 /* try to resolve using dns plugin
4334 * success does not mean we have resolved the name */
4335 r = ikev2_resolve_responder_hostname (vm, &p->responder);
4340 if (p->responder.is_resolved &&
4341 ikev2_get_if_address (p->responder.sw_if_index,
4342 ip_addr_version (&p->responder.addr), &src_if_ip))
4347 /* Prepare the SA and the IKE payload */
4349 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4350 ikev2_payload_chain_t *chain = 0;
4351 ikev2_payload_new_chain (chain);
4353 /* Build the IKE proposal payload */
4354 ikev2_sa_proposal_t *proposals = 0;
4355 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4356 proposals[0].proposal_num = 1;
4357 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4359 /* Add and then cleanup proposal data */
4360 ikev2_payload_add_sa (chain, proposals);
4361 ikev2_sa_free_proposal_vector (&proposals);
4363 sa.is_initiator = 1;
4364 sa.profile_index = p - km->profiles;
4365 sa.state = IKEV2_STATE_SA_INIT;
4366 sa.tun_itf = p->tun_itf;
4367 sa.udp_encap = p->udp_encap;
4368 if (p->natt_disabled)
4369 sa.natt_state = IKEV2_NATT_DISABLED;
4370 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4371 sa.is_tun_itf_set = 1;
4372 sa.initial_contact = 1;
4373 sa.dst_port = IKEV2_PORT;
4375 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4376 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4378 ikev2_sa_free_all_vec (&sa);
4379 ikev2_payload_destroy_chain (chain);
4380 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4383 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4384 ikev2_payload_add_nonce (chain, sa.i_nonce);
4386 /* Build the child SA proposal */
4387 vec_resize (sa.childs, 1);
4388 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4389 &sa.childs[0].i_proposals, 0);
4390 sa.childs[0].i_proposals[0].proposal_num = 1;
4391 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4392 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4393 sizeof (sa.childs[0].i_proposals[0].spi));
4395 /* Add NAT detection notification messages (mandatory) */
4396 u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 (
4397 clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip,
4398 clib_host_to_net_u16 (IKEV2_PORT));
4400 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4401 nat_detection_sha1);
4402 vec_free (nat_detection_sha1);
4403 nat_detection_sha1 =
4404 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4405 clib_host_to_net_u64 (sa.rspi),
4407 clib_host_to_net_u16 (sa.dst_port));
4408 ikev2_payload_add_notify (chain,
4409 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4410 nat_detection_sha1);
4411 vec_free (nat_detection_sha1);
4413 u8 *sig_hash_algo = vec_new (u8, 8);
4414 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4415 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4416 ikev2_payload_add_notify (chain,
4417 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4419 vec_free (sig_hash_algo);
4421 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4424 ikev2_sa_free_all_vec (&sa);
4425 ikev2_payload_destroy_chain (chain);
4426 char *errmsg = "buffer alloc failure";
4427 ikev2_log_error (errmsg);
4428 return clib_error_return (0, errmsg);
4430 ike0 = vlib_buffer_get_current (b0);
4432 /* Buffer update and boilerplate */
4433 len += vec_len (chain->data);
4434 ike0->nextpayload = chain->first_payload_type;
4435 ike0->length = clib_host_to_net_u32 (len);
4436 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4437 ikev2_payload_destroy_chain (chain);
4439 ike0->version = IKE_VERSION_2;
4440 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4441 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4442 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4445 sa.last_init_msg_id += 1;
4447 /* store whole IKE payload - needed for PSK auth */
4448 vec_reset_length (sa.last_sa_init_req_packet_data);
4449 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4451 /* add data to the SA then add it to the pool */
4452 ip_address_copy (&sa.iaddr, &src_if_ip);
4453 ip_address_copy (&sa.raddr, &p->responder.addr);
4454 sa.i_id.type = p->loc_id.type;
4455 sa.i_id.data = vec_dup (p->loc_id.data);
4456 sa.r_id.type = p->rem_id.type;
4457 sa.r_id.data = vec_dup (p->rem_id.data);
4458 sa.i_auth.method = p->auth.method;
4459 sa.i_auth.hex = p->auth.hex;
4460 sa.i_auth.data = vec_dup (p->auth.data);
4461 sa.sw_if_index = p->responder.sw_if_index;
4462 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4463 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4465 ikev2_initial_contact_cleanup (0, &sa);
4467 /* add SA to the pool */
4468 ikev2_sa_t *sa0 = 0;
4469 pool_get (km->sais, sa0);
4470 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4471 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4475 ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT,
4476 sa.dst_port, sa.sw_if_index);
4479 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4480 clib_host_to_net_u64 (sa0->ispi), 0,
4481 ip_addr_v4 (&p->responder.addr).as_u32,
4482 ip_addr_version (&p->responder.addr) == AF_IP4);
4489 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4490 ikev2_child_sa_t * csa)
4492 /* Create the Initiator notification for child SA removal */
4493 ikev2_main_t *km = &ikev2_main;
4499 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4502 ikev2_log_error ("buffer alloc failure");
4506 ike0 = vlib_buffer_get_current (b0);
4507 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4508 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4509 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4511 vec_resize (sa->del, 1);
4512 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4513 sa->del->spi = csa->i_proposals->spi;
4514 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4515 sa->last_init_msg_id += 1;
4516 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4520 if (ikev2_natt_active (sa))
4521 len = ikev2_insert_non_esp_marker (ike0, len);
4522 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4523 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4525 /* delete local child SA */
4526 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4527 ikev2_sa_del_child_sa (sa, csa);
4531 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4534 ikev2_main_t *km = &ikev2_main;
4535 ikev2_main_per_thread_data_t *tkm;
4536 ikev2_sa_t *fsa = 0;
4537 ikev2_child_sa_t *fchild = 0;
4539 /* Search for the child SA */
4540 vec_foreach (tkm, km->per_thread_data)
4546 pool_foreach (sa, tkm->sas) {
4547 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4557 if (!fchild || !fsa)
4559 r = clib_error_return (0, "Child SA not found");
4564 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4571 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4574 ikev2_main_t *km = &ikev2_main;
4575 ikev2_main_per_thread_data_t *tkm;
4576 ikev2_sa_t *fsa = 0;
4577 ikev2_main_per_thread_data_t *ftkm = 0;
4579 /* Search for the IKE SA */
4580 vec_foreach (tkm, km->per_thread_data)
4586 pool_foreach (sa, tkm->sas) {
4587 if (sa->ispi == ispi)
4599 r = clib_error_return (0, "IKE SA not found");
4603 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4608 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4609 ikev2_child_sa_t * csa)
4611 /* Create the Initiator request for create child SA */
4617 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4620 ikev2_log_error ("buffer alloc failure");
4624 ike0 = vlib_buffer_get_current (b0);
4625 ike0->version = IKE_VERSION_2;
4626 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4627 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4628 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4629 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4630 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4631 sa->last_init_msg_id += 1;
4633 ikev2_rekey_t *rekey;
4634 vec_reset_length (sa->rekey);
4635 vec_add2 (sa->rekey, rekey, 1);
4636 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4639 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4640 rekey->spi = proposals[0].spi;
4641 rekey->ispi = csa->i_proposals->spi;
4642 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4646 if (ikev2_natt_active (sa))
4647 len = ikev2_insert_non_esp_marker (ike0, len);
4648 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4649 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4650 vec_free (proposals);
4654 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4657 ikev2_main_t *km = &ikev2_main;
4658 ikev2_main_per_thread_data_t *tkm;
4659 ikev2_sa_t *fsa = 0;
4660 ikev2_child_sa_t *fchild = 0;
4662 /* Search for the child SA */
4663 vec_foreach (tkm, km->per_thread_data)
4669 pool_foreach (sa, tkm->sas) {
4670 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4680 if (!fchild || !fsa)
4682 r = clib_error_return (0, "Child SA not found");
4687 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4694 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4696 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4700 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4702 u64 *ispi, *ispi_vec = 0;
4703 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4704 ikev2_main_t *km = &ikev2_main;
4705 ikev2_main_per_thread_data_t *tkm;
4706 p->responder.sw_if_index = ~0;
4708 vec_foreach (tkm, km->per_thread_data)
4711 pool_foreach (sa, tkm->sas) {
4712 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4713 vec_add1 (sa_vec, sa);
4717 vec_foreach (sap, sa_vec)
4719 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4721 vec_reset_length (sa_vec);
4726 pool_foreach (sa, km->sais) {
4727 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4728 vec_add1 (ispi_vec, sa->ispi);
4732 vec_foreach (ispi, ispi_vec)
4734 ikev2_del_sa_init_from_main (ispi);
4737 vec_free (ispi_vec);
4740 static clib_error_t *
4741 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4743 ikev2_main_t *km = &ikev2_main;
4750 pool_foreach (p, km->profiles) {
4751 if (p->responder.sw_if_index == sw_if_index)
4752 ikev2_sa_del (p, sw_if_index);
4759 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4762 ikev2_init (vlib_main_t * vm)
4764 ikev2_main_t *km = &ikev2_main;
4765 vlib_thread_main_t *tm = vlib_get_thread_main ();
4768 clib_memset (km, 0, sizeof (ikev2_main_t));
4769 km->vnet_main = vnet_get_main ();
4772 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4773 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4774 ikev2_crypto_init (km);
4776 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4778 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4779 CLIB_CACHE_LINE_BYTES);
4780 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4782 ikev2_main_per_thread_data_t *ptd =
4783 vec_elt_at_index (km->per_thread_data, thread_id);
4785 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4787 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4788 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4789 ptd->hmac_ctx = HMAC_CTX_new ();
4791 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4792 ptd->evp_ctx = &ptd->_evp_ctx;
4793 HMAC_CTX_init (&(ptd->_hmac_ctx));
4794 ptd->hmac_ctx = &ptd->_hmac_ctx;
4798 km->sa_by_ispi = hash_create (0, sizeof (uword));
4799 km->sw_if_indices = hash_create (0, 0);
4801 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4802 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4803 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4804 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4806 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt");
4807 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4809 ikev2_cli_reference ();
4811 km->dns_resolve_name =
4812 vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name");
4813 if (!km->dns_resolve_name)
4814 ikev2_log_error ("cannot load symbols from dns plugin");
4816 km->log_level = IKEV2_LOG_ERROR;
4817 km->log_class = vlib_log_register_class ("ikev2", 0);
4822 VLIB_INIT_FUNCTION (ikev2_init) = {
4823 .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init", "dns_init"),
4828 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4831 ikev2_main_t *km = &ikev2_main;
4832 ikev2_profile_t *p = 0;
4833 vlib_main_t *vm = km->vlib_main;
4834 f64 now = vlib_time_now (vm);
4837 if (sa->profile_index != ~0)
4838 p = pool_elt_at_index (km->profiles, sa->profile_index);
4840 if (sa->is_initiator && p && csa->time_to_expiration
4841 && now > csa->time_to_expiration)
4843 if (!csa->is_expired || csa->rekey_retries > 0)
4845 ikev2_rekey_child_sa_internal (vm, sa, csa);
4846 csa->time_to_expiration = now + p->handover;
4847 csa->is_expired = 1;
4848 if (csa->rekey_retries == 0)
4850 csa->rekey_retries = 5;
4852 else if (csa->rekey_retries > 0)
4854 csa->rekey_retries--;
4855 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4856 csa->i_proposals->spi, csa->rekey_retries);
4857 if (csa->rekey_retries == 0)
4859 csa->rekey_retries = -1;
4866 csa->time_to_expiration = 0;
4867 ikev2_delete_child_sa_internal (vm, sa, csa);
4875 ipip_tunnel_t *ipip = NULL;
4876 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4877 if (~0 == sw_if_index)
4879 ip46_address_t local_ip;
4880 ip46_address_t remote_ip;
4881 if (sa->is_initiator)
4883 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4884 ip_addr_bytes (&sa->iaddr));
4885 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4886 ip_addr_bytes (&sa->raddr));
4890 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4891 ip_addr_bytes (&sa->raddr));
4892 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4893 ip_addr_bytes (&sa->iaddr));
4897 ipip_tunnel_key_t key = {
4900 .transport = IPIP_TRANSPORT_IP4,
4905 ipip = ipip_tunnel_db_find (&key);
4908 sw_if_index = ipip->sw_if_index;
4914 vec_add1 (sas_in, csa->remote_sa_id);
4915 vlib_worker_thread_barrier_sync (vm);
4916 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4917 csa->local_sa_id, sas_in);
4920 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4921 vlib_worker_thread_barrier_release (vm);
4928 ikev2_set_log_level (ikev2_log_level_t log_level)
4930 ikev2_main_t *km = &ikev2_main;
4932 if (log_level >= IKEV2_LOG_MAX)
4934 ikev2_log_error ("unknown logging level %d", log_level);
4938 km->log_level = log_level;
4943 ikev2_set_liveness_params (u32 period, u32 max_retries)
4945 ikev2_main_t *km = &ikev2_main;
4947 if (period == 0 || max_retries == 0)
4948 return clib_error_return (0, "invalid args");
4950 km->liveness_period = period;
4951 km->liveness_max_retries = max_retries;
4956 ikev2_profile_natt_disable (u8 * name)
4958 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4960 return clib_error_return (0, "unknown profile %v", name);
4962 p->natt_disabled = 1;
4967 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4969 ikev2_main_t *km = &ikev2_main;
4970 vlib_main_t *vm = km->vlib_main;
4971 ikev2_main_per_thread_data_t *tkm;
4972 ikev2_sa_t *fsa = 0;
4973 ikev2_profile_t *p = 0;
4974 ikev2_child_sa_t *fchild = 0;
4975 f64 now = vlib_time_now (vm);
4976 vlib_counter_t counts;
4978 /* Search for the SA and child SA */
4979 vec_foreach (tkm, km->per_thread_data)
4985 pool_foreach (sa, tkm->sas) {
4986 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4995 vlib_get_combined_counter (&ipsec_sa_counters,
4996 ipsec_sa->stat_index, &counts);
4998 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4999 p = pool_elt_at_index (km->profiles, fsa->profile_index);
5001 if (fchild && p && p->lifetime_maxdata)
5003 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
5005 fchild->time_to_expiration = now;
5011 ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km,
5017 p = pool_elt_at_index (km->profiles, sa->profile_index);
5019 if (!p->responder.is_resolved)
5021 clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder);
5024 clib_error_free (r);
5028 if (!p->responder.is_resolved)
5031 ip_address_copy (&sa->raddr, &p->responder.addr);
5033 /* update nat detection destination hash */
5034 np = ikev2_find_ike_notify_payload (
5035 (ike_header_t *) sa->last_sa_init_req_packet_data,
5036 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP);
5039 nat_sha = ikev2_compute_nat_sha1 (
5040 clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi),
5041 &sa->raddr, clib_host_to_net_u16 (sa->dst_port));
5042 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5047 if (ip_address_is_zero (&sa->iaddr))
5049 if (!ikev2_get_if_address (p->responder.sw_if_index,
5050 ip_addr_version (&p->responder.addr),
5054 /* update NAT detection payload */
5056 ikev2_find_ike_notify_payload
5057 ((ike_header_t *) sa->last_sa_init_req_packet_data,
5058 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
5062 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
5063 clib_host_to_net_u64 (sa->rspi),
5065 clib_host_to_net_u16 (IKEV2_PORT));
5066 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5071 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5074 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5075 clib_memcpy_fast (vlib_buffer_get_current (b),
5076 sa->last_sa_init_req_packet_data,
5077 vec_len (sa->last_sa_init_req_packet_data));
5079 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5080 vec_len (sa->last_sa_init_req_packet_data),
5081 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5085 ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km)
5092 hash_foreach (ispi, sai, km->sa_by_ispi,
5094 sa = pool_elt_at_index (km->sais, sai);
5095 if (sa->init_response_received)
5098 ikev2_process_pending_sa_init_one (vm, km, sa);
5104 ikev2_send_informational_request (ikev2_sa_t * sa)
5106 ikev2_main_t *km = &ikev2_main;
5107 ip_address_t *src, *dst;
5114 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5117 ikev2_log_error ("buffer alloc failure");
5121 ike0 = vlib_buffer_get_current (b0);
5122 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5123 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5124 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5125 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5127 sa->last_init_msg_id += 1;
5128 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5132 if (ikev2_natt_active (sa))
5133 len = ikev2_insert_non_esp_marker (ike0, len);
5135 if (sa->is_initiator)
5146 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5147 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5152 ikev2_disable_dpd (void)
5154 ikev2_main_t *km = &ikev2_main;
5155 km->dpd_disabled = 1;
5159 ikev2_mngr_process_responder_sas (ikev2_sa_t *sa)
5161 ikev2_main_t *km = &ikev2_main;
5162 vlib_main_t *vm = km->vlib_main;
5164 if (!sa->keys_generated)
5167 if (sa->liveness_retries >= km->liveness_max_retries)
5170 f64 now = vlib_time_now (vm);
5172 if (sa->liveness_period_check < now)
5174 sa->liveness_retries++;
5175 sa->liveness_period_check = now + km->liveness_period;
5176 ikev2_send_informational_request (sa);
5182 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5185 ikev2_main_t *km = &ikev2_main;
5187 ikev2_child_sa_t *c;
5192 vlib_process_wait_for_event_or_clock (vm, 2);
5193 vlib_process_get_events (vm, NULL);
5195 /* process ike child sas */
5196 ikev2_main_per_thread_data_t *tkm;
5197 vec_foreach (tkm, km->per_thread_data)
5200 u32 *to_be_deleted = 0;
5203 pool_foreach (sa, tkm->sas) {
5204 ikev2_child_sa_t *c;
5207 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5210 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5212 sa->old_remote_id_present = 0;
5216 sa->old_id_expiration -= 1;
5218 vec_foreach (c, sa->childs)
5219 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5221 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5222 vec_add1 (to_be_deleted, sa - tkm->sas);
5226 vec_foreach (sai, to_be_deleted)
5228 sa = pool_elt_at_index (tkm->sas, sai[0]);
5229 const u32 profile_index = sa->profile_index;
5230 const int reinitiate = (sa->is_initiator && profile_index != ~0);
5231 vec_foreach (c, sa->childs)
5233 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5234 ikev2_sa_del_child_sa (sa, c);
5236 ikev2_sa_free_all_vec (sa);
5237 hash_unset (tkm->sa_by_rspi, sa->rspi);
5238 pool_put (tkm->sas, sa);
5242 p = pool_elt_at_index (km->profiles, profile_index);
5245 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5248 ikev2_log_error ("%U", format_clib_error, e);
5249 clib_error_free (e);
5254 vec_free (to_be_deleted);
5257 /* process ipsec sas */
5260 pool_foreach (sa, ipsec_sa_pool)
5262 ikev2_mngr_process_ipsec_sa (sa);
5266 ikev2_process_pending_sa_init (vm, km);
5272 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5273 .function = ikev2_mngr_process_fn,
5274 .type = VLIB_NODE_TYPE_PROCESS,
5276 "ikev2-manager-process",
5279 VLIB_PLUGIN_REGISTER () = {
5280 .version = VPP_BUILD_VER,
5281 .description = "Internet Key Exchange (IKEv2) Protocol",
5286 * fd.io coding-style-patch-verification: ON
5289 * eval: (c-set-style "gnu")