2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <vnet/ipsec/ipsec_tun.h>
26 #include <vnet/ipip/ipip.h>
27 #include <plugins/ikev2/ikev2.h>
28 #include <plugins/ikev2/ikev2_priv.h>
29 #include <openssl/sha.h>
30 #include <vnet/ipsec/ipsec_punt.h>
32 #define IKEV2_LIVENESS_RETRIES 3
33 #define IKEV2_LIVENESS_PERIOD_CHECK 30
35 ikev2_main_t ikev2_main;
37 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
39 ikev2_child_sa_t * child);
41 #define ikev2_set_state(sa, v) do { \
43 ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \
53 format_ikev2_trace (u8 * s, va_list * args)
55 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
56 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
57 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
59 s = format (s, "ikev2: sw_if_index %d, next index %d",
60 t->sw_if_index, t->next_index);
64 #define IKEV2_GENERATE_SA_INIT_OK_str ""
65 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
66 "no DH group configured for IKE proposals!"
67 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
68 "DH group not supported!"
72 IKEV2_GENERATE_SA_INIT_OK,
73 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
74 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
75 } ikev2_generate_sa_error_t;
78 format_ikev2_gen_sa_error (u8 * s, va_list * args)
80 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
83 case IKEV2_GENERATE_SA_INIT_OK:
85 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
86 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
88 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
89 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
95 #define foreach_ikev2_error \
96 _(PROCESSED, "IKEv2 packets processed") \
97 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
98 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
99 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
100 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
101 _(NOT_IKEV2, "Non IKEv2 packets received") \
102 _(BAD_LENGTH, "Bad packet length") \
103 _(MALFORMED_PACKET, "Malformed packet") \
104 _(NO_BUFF_SPACE, "No buffer space")
108 #define _(sym,str) IKEV2_ERROR_##sym,
114 static char *ikev2_error_strings[] = {
115 #define _(sym,string) string,
122 IKEV2_NEXT_IP4_LOOKUP,
123 IKEV2_NEXT_IP4_ERROR_DROP,
129 IKEV2_NEXT_IP6_LOOKUP,
130 IKEV2_NEXT_IP6_ERROR_DROP,
134 typedef u32 ikev2_non_esp_marker;
136 static_always_inline u16
137 ikev2_get_port (ikev2_sa_t * sa)
139 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
142 static_always_inline int
143 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
145 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
146 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
147 return len + sizeof (ikev2_non_esp_marker);
150 static ikev2_sa_transform_t *
151 ikev2_find_transform_data (ikev2_sa_transform_t * t)
153 ikev2_main_t *km = &ikev2_main;
154 ikev2_sa_transform_t *td;
156 vec_foreach (td, km->supported_transforms)
158 if (td->type != t->type)
161 if (td->transform_id != t->transform_id)
164 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
166 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
167 || t->attrs[1] != 14)
170 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
178 static ikev2_sa_proposal_t *
179 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
180 ikev2_protocol_id_t prot_id)
182 ikev2_sa_proposal_t *rv = 0;
183 ikev2_sa_proposal_t *proposal;
184 ikev2_sa_transform_t *transform, *new_t;
185 u8 mandatory_bitmap, optional_bitmap;
187 if (prot_id == IKEV2_PROTOCOL_IKE)
189 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
190 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
191 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
193 else if (prot_id == IKEV2_PROTOCOL_ESP)
195 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
196 (1 << IKEV2_TRANSFORM_TYPE_ESN);
197 optional_bitmap = mandatory_bitmap |
198 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
200 else if (prot_id == IKEV2_PROTOCOL_AH)
202 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
203 (1 << IKEV2_TRANSFORM_TYPE_ESN);
204 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
209 vec_add2 (rv, proposal, 1);
211 vec_foreach (proposal, proposals)
214 if (proposal->protocol_id != prot_id)
217 vec_foreach (transform, proposal->transforms)
219 if ((1 << transform->type) & bitmap)
222 if (ikev2_find_transform_data (transform))
224 bitmap |= 1 << transform->type;
225 vec_add2 (rv->transforms, new_t, 1);
226 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
227 new_t->attrs = vec_dup (transform->attrs);
231 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
232 (bitmap & ~optional_bitmap) == 0)
234 rv->proposal_num = proposal->proposal_num;
235 rv->protocol_id = proposal->protocol_id;
236 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
241 vec_free (rv->transforms);
250 ikev2_sa_transform_t *
251 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
252 ikev2_transform_type_t type)
254 ikev2_sa_transform_t *t;
259 vec_foreach (t, p->transforms)
262 return ikev2_find_transform_data (t);
268 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
272 vec_foreach (c, sa->childs)
274 ikev2_sa_proposal_t *proposal =
275 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
276 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
284 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
286 ikev2_sa_proposal_t *p;
287 ikev2_sa_transform_t *t;
294 vec_foreach (t, p->transforms)
298 vec_free (p->transforms);
304 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
306 ikev2_sa_free_proposal_vector (&c->r_proposals);
307 ikev2_sa_free_proposal_vector (&c->i_proposals);
317 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
320 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
326 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
328 ikev2_sa_free_child_sa (child);
329 vec_del1 (sa->childs, child - sa->childs);
333 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
335 vec_free (sa->i_nonce);
336 vec_free (sa->r_nonce);
338 vec_free (sa->dh_shared_key);
339 vec_free (sa->dh_private_key);
340 vec_free (sa->i_dh_data);
341 vec_free (sa->r_dh_data);
343 ikev2_sa_free_proposal_vector (&sa->r_proposals);
344 ikev2_sa_free_proposal_vector (&sa->i_proposals);
347 vec_free (sa->sk_ai);
348 vec_free (sa->sk_ar);
349 vec_free (sa->sk_ei);
350 vec_free (sa->sk_er);
351 vec_free (sa->sk_pi);
352 vec_free (sa->sk_pr);
354 vec_free (sa->i_id.data);
355 vec_free (sa->r_id.data);
357 vec_free (sa->i_auth.data);
359 EVP_PKEY_free (sa->i_auth.key);
360 vec_free (sa->r_auth.data);
362 EVP_PKEY_free (sa->r_auth.key);
366 vec_free (sa->rekey);
368 vec_free (sa->last_sa_init_req_packet_data);
369 vec_free (sa->last_sa_init_res_packet_data);
371 vec_free (sa->last_res_packet_data);
373 ikev2_sa_free_all_child_sa (&sa->childs);
377 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
381 ikev2_sa_free_all_vec (sa);
383 p = hash_get (ptd->sa_by_rspi, sa->rspi);
386 hash_unset (ptd->sa_by_rspi, sa->rspi);
387 pool_put (ptd->sas, sa);
391 static ikev2_generate_sa_error_t
392 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
394 ikev2_sa_transform_t *t = 0, *t2;
395 ikev2_main_t *km = &ikev2_main;
397 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
398 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
400 /* check if received DH group is on our list of supported groups */
401 vec_foreach (t2, km->supported_transforms)
403 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
412 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
413 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
416 if (sa->is_initiator)
419 RAND_bytes ((u8 *) & sa->ispi, 8);
422 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
423 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
428 RAND_bytes ((u8 *) & sa->rspi, 8);
431 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
432 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
435 /* generate dh keys */
436 ikev2_generate_dh (sa, t);
438 return IKEV2_GENERATE_SA_INIT_OK;
442 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
444 ikev2_sa_transform_t *t = 0, *t2;
445 ikev2_main_t *km = &ikev2_main;
447 /*move some data to the new SA */
448 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
449 sa->i_nonce = _(sai->i_nonce);
450 sa->i_dh_data = _(sai->i_dh_data);
451 sa->dh_private_key = _(sai->dh_private_key);
452 ip_address_copy (&sa->iaddr, &sai->iaddr);
453 ip_address_copy (&sa->raddr, &sai->raddr);
454 sa->is_initiator = sai->is_initiator;
455 sa->i_id.type = sai->i_id.type;
456 sa->r_id.type = sai->r_id.type;
457 sa->profile_index = sai->profile_index;
458 sa->tun_itf = sai->tun_itf;
459 sa->is_tun_itf_set = sai->is_tun_itf_set;
460 if (sai->natt_state == IKEV2_NATT_DISABLED)
461 sa->natt_state = IKEV2_NATT_DISABLED;
462 sa->i_id.data = _(sai->i_id.data);
463 sa->r_id.data = _(sai->r_id.data);
464 sa->i_auth.method = sai->i_auth.method;
465 sa->i_auth.hex = sai->i_auth.hex;
466 sa->i_auth.data = _(sai->i_auth.data);
467 sa->i_auth.key = _(sai->i_auth.key);
468 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
469 sa->last_init_msg_id = sai->last_init_msg_id;
470 sa->childs = _(sai->childs);
471 sa->udp_encap = sai->udp_encap;
472 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
473 sa->dst_port = sai->dst_port;
474 sa->sw_if_index = sai->sw_if_index;
478 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
483 /* check if received DH group is on our list of supported groups */
484 vec_foreach (t2, km->supported_transforms)
486 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
495 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
500 /* generate dh keys */
501 ikev2_complete_dh (sa, t);
506 ikev2_calc_keys (ikev2_sa_t * sa)
509 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
512 u16 integ_key_len = 0, salt_len = 0;
513 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
515 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
517 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
519 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
522 integ_key_len = tr_integ->key_len;
524 salt_len = sizeof (u32);
526 vec_append (s, sa->i_nonce);
527 vec_append (s, sa->r_nonce);
528 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
530 /* Calculate S = Ni | Nr | SPIi | SPIr */
532 vec_add2 (s, tmp, 2 * sizeof (*spi));
534 spi[0] = clib_host_to_net_u64 (sa->ispi);
535 spi[1] = clib_host_to_net_u64 (sa->rspi);
537 /* calculate PRFplus */
539 int len = tr_prf->key_trunc + /* SK_d */
540 integ_key_len * 2 + /* SK_ai, SK_ar */
541 tr_encr->key_len * 2 + /* SK_ei, SK_er */
542 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
545 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
552 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
553 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
554 pos += tr_prf->key_trunc;
559 sa->sk_ai = vec_new (u8, integ_key_len);
560 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
561 pos += integ_key_len;
564 sa->sk_ar = vec_new (u8, integ_key_len);
565 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
566 pos += integ_key_len;
570 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
571 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
572 pos += tr_encr->key_len + salt_len;
575 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
576 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
577 pos += tr_encr->key_len + salt_len;
580 sa->sk_pi = vec_new (u8, tr_prf->key_len);
581 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
582 pos += tr_prf->key_len;
585 sa->sk_pr = vec_new (u8, tr_prf->key_len);
586 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
587 pos += tr_prf->key_len;
590 sa->keys_generated = 1;
594 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
597 u16 integ_key_len = 0;
600 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
602 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
604 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
606 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
609 integ_key_len = ctr_integ->key_len;
611 salt_len = sizeof (u32);
613 vec_append (s, sa->i_nonce);
614 vec_append (s, sa->r_nonce);
615 /* calculate PRFplus */
617 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
619 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
624 child->sk_ei = vec_new (u8, ctr_encr->key_len);
625 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
626 pos += ctr_encr->key_len;
631 child->sk_ai = vec_new (u8, ctr_integ->key_len);
632 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
633 pos += ctr_integ->key_len;
637 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
642 child->sk_er = vec_new (u8, ctr_encr->key_len);
643 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
644 pos += ctr_encr->key_len;
649 child->sk_ar = vec_new (u8, integ_key_len);
650 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
651 pos += integ_key_len;
655 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
664 static_always_inline u8 *
665 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
667 const u32 max_buf_size =
668 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
669 u8 buf[max_buf_size];
670 u8 *res = vec_new (u8, 20);
672 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
673 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
674 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
675 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
676 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
681 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
684 const ike_ke_payload_header_t *ke = p;
685 u16 plen = clib_net_to_host_u16 (ke->length);
686 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
687 if (sizeof (*ke) > rlen)
690 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
691 vec_reset_length (ke_data[0]);
692 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
697 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
699 const ike_payload_header_t *ikep = p;
700 u16 plen = clib_net_to_host_u16 (ikep->length);
701 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
702 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
707 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
710 if (sizeof (*ikep) > rlen)
712 *plen = clib_net_to_host_u16 (ikep->length);
713 if (*plen < sizeof (*ikep) || *plen > rlen)
719 ikev2_process_sa_init_req (vlib_main_t * vm,
720 ikev2_sa_t * sa, ike_header_t * ike,
721 udp_header_t * udp, u32 len)
723 u8 nonce[IKEV2_NONCE_SIZE];
725 u8 payload = ike->nextpayload;
726 ike_payload_header_t *ikep;
729 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
730 "from ", clib_net_to_host_u64 (ike->ispi),
731 clib_net_to_host_u64 (ike->rspi),
732 ip_addr_v4 (&sa->iaddr).as_u32,
733 ip_addr_version (&sa->iaddr) == AF_IP4);
735 sa->ispi = clib_net_to_host_u64 (ike->ispi);
737 /* store whole IKE payload - needed for PSK auth */
738 vec_reset_length (sa->last_sa_init_req_packet_data);
739 vec_add (sa->last_sa_init_req_packet_data, ike, len);
741 if (len < sizeof (*ike))
744 len -= sizeof (*ike);
745 while (p < len && payload != IKEV2_PAYLOAD_NONE)
747 ikep = (ike_payload_header_t *) & ike->payload[p];
748 int current_length = len - p;
749 if (!ikev2_check_payload_length (ikep, current_length, &plen))
752 if (payload == IKEV2_PAYLOAD_SA)
754 ikev2_sa_free_proposal_vector (&sa->i_proposals);
755 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
757 else if (payload == IKEV2_PAYLOAD_KE)
759 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
763 else if (payload == IKEV2_PAYLOAD_NONCE)
765 vec_reset_length (sa->i_nonce);
766 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
767 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
769 else if (payload == IKEV2_PAYLOAD_NOTIFY)
772 ikev2_parse_notify_payload (ikep, current_length);
773 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
775 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
777 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
779 if (sa->natt_state == IKEV2_NATT_ENABLED)
780 sa->natt_state = IKEV2_NATT_ACTIVE;
781 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
782 " behind NAT", sa->ispi);
786 else if (n->msg_type ==
787 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
789 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
791 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
793 if (sa->natt_state == IKEV2_NATT_ENABLED)
794 sa->natt_state = IKEV2_NATT_ACTIVE;
795 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
796 " (self) behind NAT", sa->ispi);
802 else if (payload == IKEV2_PAYLOAD_VENDOR)
804 ikev2_parse_vendor_payload (ikep);
808 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
810 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
812 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
813 sa->unsupported_cp = payload;
818 payload = ikep->nextpayload;
822 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
827 ikev2_process_sa_init_resp (vlib_main_t * vm,
828 ikev2_sa_t * sa, ike_header_t * ike,
829 udp_header_t * udp, u32 len)
831 u8 nonce[IKEV2_NONCE_SIZE];
833 u8 payload = ike->nextpayload;
834 ike_payload_header_t *ikep;
837 sa->ispi = clib_net_to_host_u64 (ike->ispi);
838 sa->rspi = clib_net_to_host_u64 (ike->rspi);
840 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
841 "from ", sa->ispi, sa->rspi,
842 ip_addr_v4 (&sa->raddr).as_u32,
843 ip_addr_version (&sa->raddr) == AF_IP4);
845 /* store whole IKE payload - needed for PSK auth */
846 vec_reset_length (sa->last_sa_init_res_packet_data);
847 vec_add (sa->last_sa_init_res_packet_data, ike, len);
849 if (sizeof (*ike) > len)
852 len -= sizeof (*ike);
853 while (p < len && payload != IKEV2_PAYLOAD_NONE)
855 int current_length = len - p;
856 ikep = (ike_payload_header_t *) & ike->payload[p];
857 if (!ikev2_check_payload_length (ikep, current_length, &plen))
860 if (payload == IKEV2_PAYLOAD_SA)
862 ikev2_sa_free_proposal_vector (&sa->r_proposals);
863 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
866 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
868 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
871 else if (payload == IKEV2_PAYLOAD_KE)
873 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
877 else if (payload == IKEV2_PAYLOAD_NONCE)
879 vec_reset_length (sa->r_nonce);
880 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
881 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
883 else if (payload == IKEV2_PAYLOAD_NOTIFY)
886 ikev2_parse_notify_payload (ikep, current_length);
887 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
889 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
892 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
894 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
895 " behind NAT, unsupported", sa->ispi);
899 else if (n->msg_type ==
900 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
902 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
905 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
907 if (sa->natt_state == IKEV2_NATT_ENABLED)
908 sa->natt_state = IKEV2_NATT_ACTIVE;
909 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
910 " (self) behind NAT", sa->ispi);
916 else if (payload == IKEV2_PAYLOAD_VENDOR)
918 ikev2_parse_vendor_payload (ikep);
922 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
924 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
926 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
927 sa->unsupported_cp = payload;
932 payload = ikep->nextpayload;
938 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
939 u8 * payload, u32 rlen, u32 * out_len)
941 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
943 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
944 ike_payload_header_t *ikep = 0;
947 ikev2_sa_transform_t *tr_integ;
948 ikev2_sa_transform_t *tr_encr;
950 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
952 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
953 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
955 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
958 if (rlen <= sizeof (*ike))
961 int len = rlen - sizeof (*ike);
963 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
965 ikep = (ike_payload_header_t *) & ike->payload[p];
966 int current_length = len - p;
967 if (!ikev2_check_payload_length (ikep, current_length, &plen))
970 if (*payload == IKEV2_PAYLOAD_SK)
972 last_payload = *payload;
976 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
978 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
980 sa->unsupported_cp = *payload;
985 *payload = ikep->nextpayload;
989 if (last_payload != IKEV2_PAYLOAD_SK)
991 ikev2_elog_error ("Last payload must be SK");
997 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
1000 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
1001 u8 *aad = (u8 *) ike;
1002 u32 aad_len = ikep->payload - aad;
1003 u8 *tag = ikep->payload + plen;
1005 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
1006 plen, aad, aad_len, tag, &dlen);
1010 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
1015 if (rlen < tr_integ->key_trunc)
1019 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1020 (u8 *) ike, rlen - tr_integ->key_trunc);
1022 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1025 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1027 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1029 ikev2_elog_error ("message integrity check failed");
1035 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1040 plaintext = ikep->payload + tr_encr->block_size;
1047 static_always_inline int
1048 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1050 if (i1->type != i2->type)
1053 if (vec_len (i1->data) != vec_len (i2->data))
1056 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1063 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1066 ikev2_main_t *km = &ikev2_main;
1069 ikev2_child_sa_t *c;
1071 /* find old IKE SAs with the same authenticated identity */
1073 pool_foreach (tmp, ptd->sas, ({
1074 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1075 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1078 if (sa->rspi != tmp->rspi)
1079 vec_add1(delete, tmp - ptd->sas);
1083 for (i = 0; i < vec_len (delete); i++)
1085 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1086 vec_foreach (c, tmp->childs)
1088 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1090 ikev2_delete_sa (ptd, tmp);
1094 sa->initial_contact = 0;
1098 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1101 ikev2_main_t *km = &ikev2_main;
1103 if (!sa->initial_contact)
1108 ikev2_initial_contact_cleanup_internal (ptd, sa);
1112 vec_foreach (ptd, km->per_thread_data)
1113 ikev2_initial_contact_cleanup_internal (ptd, sa);
1115 sa->initial_contact = 0;
1119 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1121 const ike_id_payload_header_t *id = p;
1122 u16 plen = clib_net_to_host_u16 (id->length);
1123 if (plen < sizeof (*id) || plen > rlen)
1126 sa_id->type = id->id_type;
1127 vec_reset_length (sa_id->data);
1128 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1134 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1136 const ike_auth_payload_header_t *ah = p;
1137 u16 plen = clib_net_to_host_u16 (ah->length);
1139 a->method = ah->auth_method;
1140 vec_reset_length (a->data);
1141 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1146 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1147 ike_header_t * ike, u32 len)
1150 ikev2_child_sa_t *first_child_sa;
1151 u8 payload = ike->nextpayload;
1153 ike_payload_header_t *ikep;
1157 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1158 "from ", clib_host_to_net_u64 (ike->ispi),
1159 clib_host_to_net_u64 (ike->rspi),
1161 ip_addr_v4 (&sa->raddr).as_u32 :
1162 ip_addr_v4 (&sa->iaddr).as_u32,
1163 ip_addr_version (&sa->raddr) == AF_IP4);
1165 ikev2_calc_keys (sa);
1167 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1171 if (sa->unsupported_cp)
1173 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1179 /* select or create 1st child SA */
1180 if (sa->is_initiator)
1182 first_child_sa = &sa->childs[0];
1186 ikev2_sa_free_all_child_sa (&sa->childs);
1187 vec_add2 (sa->childs, first_child_sa, 1);
1191 /* process encrypted payload */
1192 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1194 ikep = (ike_payload_header_t *) & plaintext[p];
1195 int current_length = dlen - p;
1196 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1199 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1201 if (sa->is_initiator)
1203 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1204 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1209 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1210 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1214 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1216 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1219 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1221 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1224 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1226 if (sa->is_initiator)
1228 if (!ikev2_parse_auth_payload (ikep, current_length,
1234 if (!ikev2_parse_auth_payload (ikep, current_length,
1239 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1242 ikev2_parse_notify_payload (ikep, current_length);
1243 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1245 sa->initial_contact = 1;
1249 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1251 ikev2_parse_vendor_payload (ikep);
1253 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1255 vec_free (first_child_sa->tsi);
1256 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1258 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1260 vec_free (first_child_sa->tsr);
1261 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1265 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1268 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1270 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1271 sa->unsupported_cp = payload;
1276 payload = ikep->nextpayload;
1283 ikev2_set_state (sa, IKEV2_STATE_DELETED);
1288 ikev2_process_informational_req (vlib_main_t * vm,
1289 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1292 u8 payload = ike->nextpayload;
1294 ike_payload_header_t *ikep;
1296 ikev2_notify_t *n = 0;
1298 sa->liveness_retries = 0;
1299 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1300 "from ", clib_host_to_net_u64 (ike->ispi),
1301 clib_host_to_net_u64 (ike->rspi),
1302 ip_addr_v4 (&sa->iaddr).as_u32,
1303 ip_addr_version (&sa->iaddr) == AF_IP4);
1305 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1310 /* process encrypted payload */
1312 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1314 u32 current_length = dlen - p;
1315 if (p + sizeof (*ikep) > dlen)
1318 ikep = (ike_payload_header_t *) & plaintext[p];
1319 u16 plen = clib_net_to_host_u16 (ikep->length);
1321 if (plen < sizeof (*ikep) || plen > current_length)
1324 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1326 n = ikev2_parse_notify_payload (ikep, current_length);
1329 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1330 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1333 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1335 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1337 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1339 ikev2_parse_vendor_payload (ikep);
1343 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1345 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1347 sa->unsupported_cp = payload;
1351 payload = ikep->nextpayload;
1358 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1359 ikev2_sa_t * sa, ike_header_t * ike,
1363 u8 payload = ike->nextpayload;
1366 u8 nonce[IKEV2_NONCE_SIZE];
1368 ike_payload_header_t *ikep;
1369 ikev2_notify_t *n = 0;
1370 ikev2_ts_t *tsi = 0;
1371 ikev2_ts_t *tsr = 0;
1372 ikev2_sa_proposal_t *proposal = 0;
1373 ikev2_child_sa_t *child_sa;
1377 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received "
1378 "from ", clib_host_to_net_u64 (ike->ispi),
1379 clib_host_to_net_u64 (ike->rspi),
1380 ip_addr_v4 (&sa->raddr).as_u32,
1381 ip_addr_version (&sa->raddr) == AF_IP4);
1383 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1386 goto cleanup_and_exit;
1388 /* process encrypted payload */
1390 while (payload != IKEV2_PAYLOAD_NONE)
1392 ikep = (ike_payload_header_t *) & plaintext[p];
1393 int current_length = dlen - p;
1394 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1395 goto cleanup_and_exit;
1397 if (payload == IKEV2_PAYLOAD_SA)
1399 proposal = ikev2_parse_sa_payload (ikep, current_length);
1401 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1403 n = ikev2_parse_notify_payload (ikep, current_length);
1404 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1409 else if (payload == IKEV2_PAYLOAD_DELETE)
1411 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1413 else if (payload == IKEV2_PAYLOAD_VENDOR)
1415 ikev2_parse_vendor_payload (ikep);
1417 else if (payload == IKEV2_PAYLOAD_NONCE)
1419 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1421 else if (payload == IKEV2_PAYLOAD_TSI)
1423 tsi = ikev2_parse_ts_payload (ikep, current_length);
1425 else if (payload == IKEV2_PAYLOAD_TSR)
1427 tsr = ikev2_parse_ts_payload (ikep, current_length);
1431 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1433 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1435 sa->unsupported_cp = payload;
1436 goto cleanup_and_exit;
1439 payload = ikep->nextpayload;
1443 if (sa->is_initiator && proposal
1444 && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1446 ikev2_rekey_t *rekey = sa->rekey;
1447 if (vec_len (rekey) == 0)
1448 goto cleanup_and_exit;
1449 rekey->protocol_id = proposal->protocol_id;
1451 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1452 rekey->i_proposal->spi = rekey->spi;
1453 rekey->r_proposal = proposal;
1457 vec_reset_length (sa->r_nonce);
1458 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1459 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1462 child_sa->rekey_retries = 0;
1467 ikev2_rekey_t *rekey;
1468 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1471 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1473 goto cleanup_and_exit;
1475 vec_add2 (sa->rekey, rekey, 1);
1476 rekey->protocol_id = n->protocol_id;
1477 rekey->spi = n->spi;
1478 rekey->i_proposal = proposal;
1480 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1484 vec_reset_length (sa->i_nonce);
1485 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1486 /* generate new Nr */
1487 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1488 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1491 goto cleanup_and_exit;
1497 vec_free (proposal);
1504 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1512 ikev2_sa_transform_t *tr_prf;
1515 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1521 nonce = sa->i_nonce;
1522 packet_data = sa->last_sa_init_res_packet_data;
1528 nonce = sa->r_nonce;
1529 packet_data = sa->last_sa_init_req_packet_data;
1532 data = vec_new (u8, 4);
1534 vec_append (data, id->data);
1536 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1537 vec_append (authmsg, packet_data);
1538 vec_append (authmsg, nonce);
1539 vec_append (authmsg, id_hash);
1547 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1549 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1550 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1551 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1552 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1559 ikev2_sa_match_ts (ikev2_sa_t * sa)
1561 ikev2_main_t *km = &ikev2_main;
1563 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1564 ikev2_id_t *id_rem, *id_loc;
1567 pool_foreach (p, km->profiles, ({
1569 if (sa->is_initiator)
1585 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1586 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1589 sa->profile_index = p - km->profiles;
1591 vec_foreach(ts, sa->childs[0].tsi)
1593 if (ikev2_ts_cmp(p_tsi, ts))
1595 vec_add1 (tsi, ts[0]);
1600 vec_foreach(ts, sa->childs[0].tsr)
1602 if (ikev2_ts_cmp(p_tsr, ts))
1604 vec_add1 (tsr, ts[0]);
1615 vec_free (sa->childs[0].tsi);
1616 vec_free (sa->childs[0].tsr);
1617 sa->childs[0].tsi = tsi;
1618 sa->childs[0].tsr = tsr;
1624 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1629 ikev2_sa_auth (ikev2_sa_t * sa)
1631 ikev2_main_t *km = &ikev2_main;
1632 ikev2_profile_t *p, *sel_p = 0;
1633 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1634 ikev2_sa_transform_t *tr_prf;
1637 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1639 /* only shared key and rsa signature */
1640 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1641 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1643 ikev2_elog_uint (IKEV2_LOG_ERROR,
1644 "unsupported authentication method %u",
1646 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1650 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1651 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1653 ikev2_id_t *id_rem, *id_loc;
1654 ikev2_auth_t *sa_auth;
1656 if (sa->is_initiator)
1660 sa_auth = &sa->r_auth;
1666 sa_auth = &sa->i_auth;
1670 pool_foreach (p, km->profiles, ({
1673 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1674 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1677 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1679 if (!p->auth.data ||
1680 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1683 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1684 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1686 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1688 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1695 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1697 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1700 if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1702 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1715 sa->udp_encap = sel_p->udp_encap;
1716 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1720 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1722 if (!sa->is_initiator)
1724 vec_free (sa->r_id.data);
1725 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1726 sa->r_id.type = sel_p->loc_id.type;
1727 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1728 sa->i_id.type = sel_p->rem_id.type;
1730 /* generate our auth data */
1731 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1732 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1734 vec_free (sa->r_auth.data);
1735 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1736 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1738 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1740 vec_free (sa->r_auth.data);
1741 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1742 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1746 /* select transforms for 1st child sa */
1747 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1748 sa->childs[0].r_proposals =
1749 ikev2_select_proposal (sa->childs[0].i_proposals,
1750 IKEV2_PROTOCOL_ESP);
1752 if (~0 != sel_p->tun_itf)
1754 sa->is_tun_itf_set = 1;
1755 sa->tun_itf = sel_p->tun_itf;
1761 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1762 "profile found! ispi %lx", sa->ispi);
1763 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1771 ikev2_sa_auth_init (ikev2_sa_t * sa)
1773 ikev2_main_t *km = &ikev2_main;
1774 u8 *authmsg, *key_pad, *psk = 0;
1775 ikev2_sa_transform_t *tr_prf;
1778 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1780 /* only shared key and rsa signature */
1781 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1782 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1784 ikev2_elog_uint (IKEV2_LOG_ERROR,
1785 "unsupported authentication method %u",
1787 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1791 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1792 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1793 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1795 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1797 vec_free (sa->i_auth.data);
1798 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1799 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1801 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1803 vec_free (sa->i_auth.data);
1804 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1805 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1814 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1816 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1820 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1822 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1832 ipsec_sa_flags_t flags;
1835 ipsec_crypto_alg_t encr_type;
1836 ipsec_integ_alg_t integ_type;
1837 ip46_address_t local_ip;
1838 ip46_address_t remote_ip;
1839 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1841 u32 old_remote_sa_id;
1842 u16 ipsec_over_udp_port;
1845 } ikev2_add_ipsec_tunnel_args_t;
1848 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1850 ikev2_main_t *km = &ikev2_main;
1854 if (~0 == a->sw_if_index)
1856 /* no tunnel associated with the SA/profile - create a new one */
1857 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0,
1858 &a->local_ip, &a->remote_ip, 0,
1859 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1860 TUNNEL_MODE_P2P, &sw_if_index);
1862 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1864 if (hash_get (km->sw_if_indices, sw_if_index))
1865 /* interface is managed by IKE; proceed with updating SAs */
1868 hash_set1 (km->sw_if_indices, sw_if_index);
1872 sw_if_index = a->sw_if_index;
1873 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1878 ikev2_elog_uint (IKEV2_LOG_ERROR,
1879 "installing ipip tunnel failed! local spi: %x",
1885 vec_add1 (sas_in, a->remote_sa_id);
1888 ipsec_tun_protect_del (sw_if_index, NULL);
1890 /* replace local SA immediately */
1891 ipsec_sa_unlock_id (a->local_sa_id);
1893 /* keep the old sa */
1894 vec_add1 (sas_in, a->old_remote_sa_id);
1897 rv = ipsec_sa_add_and_lock (a->local_sa_id,
1899 IPSEC_PROTOCOL_ESP, a->encr_type,
1900 &a->loc_ckey, a->integ_type, &a->loc_ikey,
1901 a->flags, 0, a->salt_local, &a->local_ip,
1902 &a->remote_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1903 IP_DSCP_CS0, NULL, a->src_port, a->dst_port);
1907 rv = ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi,
1908 IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey,
1909 a->integ_type, &a->rem_ikey,
1910 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0,
1911 a->salt_remote, &a->remote_ip,
1912 &a->local_ip, TUNNEL_ENCAP_DECAP_FLAG_NONE,
1914 a->ipsec_over_udp_port, a->ipsec_over_udp_port);
1918 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1925 ipsec_sa_unlock_id (a->remote_sa_id);
1927 ipsec_sa_unlock_id (a->local_sa_id);
1933 ikev2_create_tunnel_interface (vlib_main_t * vm,
1935 ikev2_child_sa_t * child, u32 sa_index,
1936 u32 child_index, u8 is_rekey)
1938 u32 thread_index = vlib_get_thread_index ();
1939 ikev2_main_t *km = &ikev2_main;
1940 ipsec_crypto_alg_t encr_type;
1941 ipsec_integ_alg_t integ_type;
1942 ikev2_profile_t *p = 0;
1943 ikev2_sa_transform_t *tr;
1944 ikev2_sa_proposal_t *proposals;
1946 ikev2_add_ipsec_tunnel_args_t a;
1948 clib_memset (&a, 0, sizeof (a));
1950 if (!child->r_proposals)
1952 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1956 if (sa->is_initiator)
1958 ip_address_to_46 (&sa->iaddr, &a.local_ip);
1959 ip_address_to_46 (&sa->raddr, &a.remote_ip);
1960 proposals = child->r_proposals;
1961 a.local_spi = child->r_proposals[0].spi;
1962 a.remote_spi = child->i_proposals[0].spi;
1966 ip_address_to_46 (&sa->raddr, &a.local_ip);
1967 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
1968 proposals = child->i_proposals;
1969 a.local_spi = child->i_proposals[0].spi;
1970 a.remote_spi = child->r_proposals[0].spi;
1973 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1976 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1977 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1979 if (ikev2_natt_active (sa))
1980 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1981 a.is_rekey = is_rekey;
1983 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1984 if (tr && tr->esn_type)
1985 a.flags |= IPSEC_SA_FLAG_USE_ESN;
1987 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1990 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1992 switch (tr->key_len)
1995 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1998 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2001 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2004 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2009 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2012 switch (tr->key_len)
2015 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2018 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2021 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2024 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2032 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2038 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2041 a.encr_type = encr_type;
2045 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2048 switch (tr->integ_type)
2050 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2051 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2053 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2054 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2056 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2057 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2059 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2060 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2063 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2069 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2075 integ_type = IPSEC_INTEG_ALG_NONE;
2078 a.integ_type = integ_type;
2079 ikev2_calc_child_keys (sa, child);
2081 if (sa->is_initiator)
2083 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2084 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2085 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2086 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2089 a.salt_remote = child->salt_er;
2090 a.salt_local = child->salt_ei;
2092 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2096 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2097 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2098 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2099 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2102 a.salt_remote = child->salt_ei;
2103 a.salt_local = child->salt_er;
2106 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2107 a.src_port = sa->ipsec_over_udp_port;
2110 if (sa->is_initiator && sa->profile_index != ~0)
2111 p = pool_elt_at_index (km->profiles, sa->profile_index);
2113 if (p && p->lifetime)
2115 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2116 if (p->lifetime_jitter)
2118 // This is not much better than rand(3), which Coverity warns
2119 // is unsuitable for security applications; random_u32 is
2120 // however fast. If this perturbance to the expiration time
2121 // needs to use a better RNG then we may need to use something
2122 // like /dev/urandom which has significant overhead.
2123 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2124 rnd = random_u32 (&rnd);
2126 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2130 if (thread_index & 0xffffffc0)
2131 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2133 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2134 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2136 child->local_sa_id =
2138 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2140 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2145 /* create a new remote SA ID to keep the old SA for a bit longer
2146 * so the peer has some time to swap their SAs */
2148 /* use most significat bit of child index part in id */
2150 if (sa->current_remote_id_mask)
2152 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2153 sa->current_remote_id_mask = 0;
2157 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2158 sa->current_remote_id_mask = mask;
2159 remote_sa_id |= mask;
2161 sa->old_id_expiration = 3.0;
2162 sa->old_remote_id_present = 1;
2165 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2167 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2168 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2170 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2171 (u8 *) & a, sizeof (a));
2177 ip46_address_t local_ip;
2178 ip46_address_t remote_ip;
2182 } ikev2_del_ipsec_tunnel_args_t;
2184 static_always_inline u32
2185 ikev2_flip_alternate_sa_bit (u32 id)
2194 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2196 ikev2_main_t *km = &ikev2_main;
2197 ipip_tunnel_t *ipip = NULL;
2200 if (~0 == a->sw_if_index)
2203 ipip_tunnel_key_t key = {
2205 .dst = a->remote_ip,
2206 .transport = IPIP_TRANSPORT_IP4,
2211 ipip = ipip_tunnel_db_find (&key);
2215 sw_if_index = ipip->sw_if_index;
2216 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2223 sw_if_index = a->sw_if_index;
2224 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2227 if (~0 != sw_if_index)
2228 ipsec_tun_protect_del (sw_if_index, NULL);
2230 ipsec_sa_unlock_id (a->remote_sa_id);
2231 ipsec_sa_unlock_id (a->local_sa_id);
2232 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2235 ipip_del_tunnel (ipip->sw_if_index);
2239 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2240 ikev2_child_sa_t * child)
2242 ikev2_del_ipsec_tunnel_args_t a;
2244 clib_memset (&a, 0, sizeof (a));
2246 if (sa->is_initiator)
2248 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2249 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2253 ip_address_to_46 (&sa->raddr, &a.local_ip);
2254 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2257 a.remote_sa_id = child->remote_sa_id;
2258 a.local_sa_id = child->local_sa_id;
2259 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2261 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2267 ikev2_generate_message (vlib_buffer_t * b, ikev2_sa_t * sa,
2268 ike_header_t * ike, void *user, udp_header_t * udp)
2270 ikev2_main_t *km = &ikev2_main;
2271 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2273 ike_payload_header_t *ph;
2277 ikev2_sa_transform_t *tr_encr, *tr_integ;
2279 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2281 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2283 ikev2_payload_chain_t *chain = 0;
2284 ikev2_payload_new_chain (chain);
2286 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2288 if (sa->r_proposals == 0)
2290 ikev2_payload_add_notify (chain,
2291 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2292 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2294 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2296 u8 *data = vec_new (u8, 2);
2297 ikev2_sa_transform_t *tr_dh;
2299 ikev2_sa_get_td_for_type (sa->r_proposals,
2300 IKEV2_TRANSFORM_TYPE_DH);
2301 ASSERT (tr_dh && tr_dh->dh_type);
2303 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2304 data[1] = (tr_dh->dh_type) & 0xff;
2306 ikev2_payload_add_notify (chain,
2307 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2310 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2312 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2314 u8 *data = vec_new (u8, 1);
2316 data[0] = sa->unsupported_cp;
2317 ikev2_payload_add_notify (chain,
2318 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2326 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2327 ikev2_payload_add_sa (chain, sa->r_proposals);
2328 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2329 ikev2_payload_add_nonce (chain, sa->r_nonce);
2331 u8 *nat_detection_sha1 =
2332 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2333 clib_host_to_net_u64 (sa->rspi),
2334 &sa->raddr, udp->dst_port);
2335 ikev2_payload_add_notify (chain,
2336 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2337 nat_detection_sha1);
2338 vec_free (nat_detection_sha1);
2339 nat_detection_sha1 =
2340 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2341 clib_host_to_net_u64 (sa->rspi),
2342 &sa->iaddr, udp->src_port);
2343 ikev2_payload_add_notify (chain,
2344 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2345 nat_detection_sha1);
2346 vec_free (nat_detection_sha1);
2349 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2351 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2353 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2354 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2355 ikev2_payload_add_auth (chain, &sa->r_auth);
2356 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2357 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2358 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2360 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2362 ikev2_payload_add_notify (chain,
2363 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2365 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2367 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2369 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2371 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2372 ikev2_payload_add_auth (chain, &sa->r_auth);
2374 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2376 ikev2_payload_add_notify (chain,
2377 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2378 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2379 ikev2_payload_add_auth (chain, &sa->r_auth);
2380 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2381 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2383 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2385 u8 *data = vec_new (u8, 1);
2387 data[0] = sa->unsupported_cp;
2388 ikev2_payload_add_notify (chain,
2389 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2393 else if (sa->state == IKEV2_STATE_SA_INIT)
2395 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2396 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2397 ikev2_payload_add_auth (chain, &sa->i_auth);
2398 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2399 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2400 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2401 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2406 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2410 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2412 /* if pending delete */
2415 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2417 if (ike_hdr_is_request (ike))
2418 ikev2_payload_add_delete (chain, sa->del);
2420 /* The response to a request that deletes the IKE SA is an empty
2421 INFORMATIONAL response. */
2422 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2424 /* The response to a request that deletes ESP or AH SAs will contain
2425 delete payloads for the paired SAs going in the other direction. */
2428 ikev2_payload_add_delete (chain, sa->del);
2433 /* received N(AUTHENTICATION_FAILED) */
2434 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2436 ikev2_set_state (sa, IKEV2_STATE_DELETED);
2439 /* received unsupported critical payload */
2440 else if (sa->unsupported_cp)
2442 u8 *data = vec_new (u8, 1);
2444 data[0] = sa->unsupported_cp;
2445 ikev2_payload_add_notify (chain,
2446 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2449 sa->unsupported_cp = 0;
2451 /* else send empty response */
2453 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2455 if (sa->is_initiator)
2458 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2459 ikev2_notify_t notify;
2460 u8 *data = vec_new (u8, 4);
2461 clib_memset (¬ify, 0, sizeof (notify));
2462 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2463 notify.spi = sa->childs[0].i_proposals->spi;
2464 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2466 ikev2_payload_add_sa (chain, proposals);
2467 ikev2_payload_add_nonce (chain, sa->i_nonce);
2468 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2469 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2470 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2477 if (vec_len (sa->rekey) > 0)
2479 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2480 ikev2_payload_add_nonce (chain, sa->r_nonce);
2481 ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
2483 ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
2485 vec_del1 (sa->rekey, 0);
2487 else if (sa->unsupported_cp)
2489 u8 *data = vec_new (u8, 1);
2491 data[0] = sa->unsupported_cp;
2492 ikev2_payload_add_notify (chain,
2493 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2496 sa->unsupported_cp = 0;
2500 ikev2_payload_add_notify (chain,
2501 IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2508 ike->version = IKE_VERSION_2;
2509 ike->nextpayload = IKEV2_PAYLOAD_SK;
2510 tlen = sizeof (*ike);
2512 if (sa->is_initiator)
2513 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2515 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2517 tlen += vec_len (chain->data);
2518 ike->nextpayload = chain->first_payload_type;
2519 ike->length = clib_host_to_net_u32 (tlen);
2521 if (tlen + b->current_length + b->current_data > buffer_data_size)
2527 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2529 /* store whole IKE payload - needed for PSK auth */
2530 vec_reset_length (sa->last_sa_init_res_packet_data);
2531 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2535 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2536 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2539 plen = sizeof (*ph);
2540 ph = (ike_payload_header_t *) & ike->payload[0];
2541 ph->nextpayload = chain->first_payload_type;
2544 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2545 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2546 plen += vec_len (chain->data) + iv_len;
2548 /* add space for hmac/tag */
2550 plen += tr_integ->key_trunc;
2552 plen += IKEV2_GCM_ICV_SIZE;
2555 if (tlen + b->current_length + b->current_data > buffer_data_size)
2561 /* payload and total length */
2562 ph->length = clib_host_to_net_u16 (plen);
2563 ike->length = clib_host_to_net_u32 (tlen);
2567 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2568 ph->payload, (u8 *) ike,
2569 sizeof (*ike) + sizeof (*ph),
2570 ph->payload + plen - sizeof (*ph) -
2571 IKEV2_GCM_ICV_SIZE))
2579 if (!ikev2_encrypt_data
2580 (ptd, sa, tr_encr, chain->data, ph->payload))
2586 ikev2_calc_integr (tr_integ,
2587 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2588 (u8 *) ike, tlen - tr_integ->key_trunc);
2589 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2590 sizeof (*ike), integ, tr_integ->key_trunc);
2593 /* store whole IKE payload - needed for retransmit */
2594 vec_reset_length (sa->last_res_packet_data);
2595 vec_add (sa->last_res_packet_data, ike, tlen);
2599 ikev2_payload_destroy_chain (chain);
2605 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2606 ip_address_t iaddr, ip_address_t raddr,
2611 u8 payload = ike->nextpayload;
2613 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2614 ip_address_cmp (&sa->iaddr, &iaddr) ||
2615 ip_address_cmp (&sa->raddr, &raddr))
2620 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2622 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2623 u32 plen = clib_net_to_host_u16 (ikep->length);
2625 if (plen < sizeof (ike_payload_header_t))
2628 if (payload == IKEV2_PAYLOAD_NONCE &&
2629 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2631 /* req is retransmit */
2632 if (sa->state == IKEV2_STATE_SA_INIT)
2634 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2635 u32 slen = clib_net_to_host_u32 (tmp->length);
2636 ike->ispi = tmp->ispi;
2637 ike->rspi = tmp->rspi;
2638 ike->nextpayload = tmp->nextpayload;
2639 ike->version = tmp->version;
2640 ike->exchange = tmp->exchange;
2641 ike->flags = tmp->flags;
2642 ike->msgid = tmp->msgid;
2643 ike->length = tmp->length;
2644 clib_memcpy_fast (ike->payload, tmp->payload,
2645 slen - sizeof (*ike));
2646 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2647 "ispi %lx IKE_SA_INIT retransmit "
2648 "from %d.%d.%d.%d to %d.%d.%d.%d",
2650 ip_addr_v4 (&raddr).as_u32,
2651 ip_addr_v4 (&iaddr).as_u32);
2654 /* else ignore req */
2657 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2658 "ispi %lx IKE_SA_INIT ignore "
2659 "from %d.%d.%d.%d to %d.%d.%d.%d",
2661 ip_addr_v4 (&raddr).as_u32,
2662 ip_addr_v4 (&iaddr).as_u32);
2666 payload = ikep->nextpayload;
2674 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2675 ip_address_t raddr, u32 rlen)
2679 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2682 pool_foreach (sa, ptd->sas, ({
2683 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2689 /* req is not retransmit */
2694 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2696 if (ike_hdr_is_response (ike))
2699 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2702 if (msg_id > sa->last_msg_id)
2704 sa->last_msg_id = msg_id;
2708 /* retransmitted req */
2709 if (msg_id == sa->last_msg_id)
2711 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2712 u32 slen = clib_net_to_host_u32 (tmp->length);
2713 ike->ispi = tmp->ispi;
2714 ike->rspi = tmp->rspi;
2715 ike->nextpayload = tmp->nextpayload;
2716 ike->version = tmp->version;
2717 ike->exchange = tmp->exchange;
2718 ike->flags = tmp->flags;
2719 ike->msgid = tmp->msgid;
2720 ike->length = tmp->length;
2721 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2722 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2723 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2724 ip_addr_v4 (&sa->iaddr).as_u32);
2728 /* old req ignore */
2729 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2730 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2731 ip_addr_v4 (&sa->iaddr).as_u32);
2736 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2738 ikev2_main_t *km = &ikev2_main;
2739 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2740 sa->profile_index = ~0;
2744 ikev2_del_sa_init_from_main (u64 * ispi)
2746 ikev2_main_t *km = &ikev2_main;
2747 uword *p = hash_get (km->sa_by_ispi, *ispi);
2750 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2751 hash_unset (km->sa_by_ispi, sai->ispi);
2752 ikev2_sa_free_all_vec (sai);
2753 pool_put (km->sais, sai);
2758 ikev2_del_sa_init (u64 ispi)
2760 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2764 static_always_inline void
2765 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2767 if (sa->is_initiator)
2769 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2770 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2774 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2775 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2779 static_always_inline void
2780 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2782 if (sa->is_initiator)
2784 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2785 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2789 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2790 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2794 static_always_inline void
2795 ikev2_set_ip_address (ikev2_sa_t * sa, const void *iaddr,
2796 const void *raddr, const int af)
2798 ip_address_set (&sa->raddr, raddr, af);
2799 ip_address_set (&sa->iaddr, iaddr, af);
2803 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2804 ip6_header_t * ip6, u8 is_ip4)
2809 src = ip4->src_address.as_u32;
2810 dst = ip4->dst_address.as_u32;
2814 src = ip6->src_address.as_u32[3];
2815 dst = ip6->dst_address.as_u32[3];
2817 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2818 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2819 exchange, src, dst);
2823 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2825 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2827 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2830 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2831 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2832 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2833 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2836 static_always_inline uword
2837 ikev2_node_internal (vlib_main_t * vm,
2838 vlib_node_runtime_t * node, vlib_frame_t * frame,
2841 u32 n_left = frame->n_vectors, *from;
2842 ikev2_main_t *km = &ikev2_main;
2843 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2844 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2845 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2848 from = vlib_frame_vector_args (frame);
2849 vlib_get_buffers (vm, from, bufs, n_left);
2854 vlib_buffer_t *b0 = b[0];
2855 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2856 : IKEV2_NEXT_IP6_ERROR_DROP;
2857 ip4_header_t *ip40 = 0;
2858 ip6_header_t *ip60 = 0;
2861 ikev2_sa_t *sa0 = 0;
2862 ikev2_sa_t sa; /* temporary store for SA */
2865 int is_req = 0, has_non_esp_marker = 0;
2867 ASSERT (0 == b0->punt_reason
2869 && b0->punt_reason ==
2870 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0]));
2873 && b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0])
2875 u8 *ptr = vlib_buffer_get_current (b0);
2876 ip40 = (ip4_header_t *) ptr;
2877 ptr += sizeof (*ip40);
2878 udp0 = (udp_header_t *) ptr;
2879 ptr += sizeof (*udp0);
2880 ike0 = (ike_header_t *) ptr;
2881 ip_hdr_sz = sizeof (*ip40);
2885 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2886 ike0 = vlib_buffer_get_current (b0);
2887 vlib_buffer_advance (b0, -sizeof (*udp0));
2888 udp0 = vlib_buffer_get_current (b0);
2892 ip40 = (ip4_header_t *) ipx_hdr;
2893 ip_hdr_sz = sizeof (*ip40);
2897 ip60 = (ip6_header_t *) ipx_hdr;
2898 ip_hdr_sz = sizeof (*ip60);
2900 vlib_buffer_advance (b0, -ip_hdr_sz);
2903 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2905 /* check for non-esp marker */
2906 if (*((u32 *) ike0) == 0)
2909 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2910 rlen -= sizeof (ikev2_non_esp_marker);
2911 has_non_esp_marker = 1;
2914 if (clib_net_to_host_u32 (ike0->length) != rlen)
2916 vlib_node_increment_counter (vm, node->node_index,
2917 IKEV2_ERROR_BAD_LENGTH, 1);
2921 if (ike0->version != IKE_VERSION_2)
2923 vlib_node_increment_counter (vm, node->node_index,
2924 IKEV2_ERROR_NOT_IKEV2, 1);
2928 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2931 clib_memset (sa0, 0, sizeof (*sa0));
2933 if (ike_hdr_is_initiator (ike0))
2935 if (ike0->rspi == 0)
2938 ikev2_set_ip_address (sa0, &ip40->src_address,
2939 &ip40->dst_address, AF_IP4);
2941 ikev2_set_ip_address (sa0, &ip60->src_address,
2942 &ip60->dst_address, AF_IP6);
2944 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2947 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2951 vlib_node_increment_counter (vm, node->node_index,
2954 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2956 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2961 res = ikev2_process_sa_init_req (vm, sa0, ike0, udp0, rlen);
2963 vlib_node_increment_counter (vm, node->node_index,
2964 IKEV2_ERROR_MALFORMED_PACKET,
2967 if (sa0->state == IKEV2_STATE_SA_INIT)
2969 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
2971 ikev2_select_proposal (sa0->i_proposals,
2972 IKEV2_PROTOCOL_IKE);
2973 ikev2_generate_sa_init_data_and_log (sa0);
2976 if (sa0->state == IKEV2_STATE_SA_INIT
2977 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2979 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
2980 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
2982 vlib_node_increment_counter (vm, node->node_index,
2983 IKEV2_ERROR_NO_BUFF_SPACE,
2987 if (sa0->state == IKEV2_STATE_SA_INIT)
2989 /* add SA to the pool */
2990 pool_get (ptd->sas, sa0);
2991 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
2992 ikev2_init_sa (vm, sa0);
2993 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
2997 ikev2_sa_free_all_vec (sa0);
3001 else //received sa_init without initiator flag
3004 ikev2_set_ip_address (sa0, &ip40->dst_address,
3005 &ip40->src_address, AF_IP4);
3007 ikev2_set_ip_address (sa0, &ip60->dst_address,
3008 &ip60->src_address, AF_IP6);
3010 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3012 if (sa0->state == IKEV2_STATE_SA_INIT)
3015 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3016 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3019 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3021 if (clib_atomic_bool_cmp_and_swap
3022 (&sai->init_response_received, 0, 1))
3024 ikev2_complete_sa_data (sa0, sai);
3025 ikev2_calc_keys (sa0);
3026 ikev2_sa_auth_init (sa0);
3027 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3029 clib_net_to_host_u32 (sai->last_init_msg_id);
3030 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3032 ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3034 vlib_node_increment_counter (vm,
3036 IKEV2_ERROR_NO_BUFF_SPACE,
3041 /* we've already processed sa-init response */
3042 sa0->state = IKEV2_STATE_UNKNOWN;
3047 if (sa0->state == IKEV2_STATE_SA_INIT)
3049 /* add SA to the pool */
3050 pool_get (ptd->sas, sa0);
3051 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3052 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3056 ikev2_sa_free_all_vec (sa0);
3060 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3063 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3066 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3067 slen = ikev2_retransmit_resp (sa0, ike0);
3070 vlib_node_increment_counter (vm, node->node_index,
3073 IKEV2_ERROR_IKE_REQ_IGNORE
3075 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3080 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3081 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3083 ikev2_sa_auth (sa0);
3085 vlib_node_increment_counter (vm, node->node_index,
3086 IKEV2_ERROR_MALFORMED_PACKET, 1);
3087 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3089 ikev2_initial_contact_cleanup (ptd, sa0);
3090 ikev2_sa_match_ts (sa0);
3091 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3092 ikev2_create_tunnel_interface (vm, sa0,
3097 if (sa0->is_initiator)
3099 ikev2_del_sa_init (sa0->ispi);
3103 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3104 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3106 vlib_node_increment_counter (vm, node->node_index,
3107 IKEV2_ERROR_NO_BUFF_SPACE,
3112 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3115 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3118 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3119 slen = ikev2_retransmit_resp (sa0, ike0);
3122 vlib_node_increment_counter (vm, node->node_index,
3125 IKEV2_ERROR_IKE_REQ_IGNORE
3127 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3132 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3135 vlib_node_increment_counter (vm, node->node_index,
3136 IKEV2_ERROR_MALFORMED_PACKET,
3144 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3146 ikev2_delete_t *d, *tmp, *resp = 0;
3147 vec_foreach (d, sa0->del)
3149 ikev2_child_sa_t *ch_sa;
3150 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3152 !sa0->is_initiator);
3155 ikev2_delete_tunnel_interface (km->vnet_main,
3157 if (!sa0->is_initiator)
3159 vec_add2 (resp, tmp, 1);
3160 tmp->protocol_id = d->protocol_id;
3161 tmp->spi = ch_sa->r_proposals[0].spi;
3163 ikev2_sa_del_child_sa (sa0, ch_sa);
3166 if (!sa0->is_initiator)
3168 vec_free (sa0->del);
3173 if (ike_hdr_is_request (ike0))
3175 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3176 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3178 vlib_node_increment_counter (vm, node->node_index,
3179 IKEV2_ERROR_NO_BUFF_SPACE,
3184 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3187 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3190 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3191 slen = ikev2_retransmit_resp (sa0, ike0);
3194 vlib_node_increment_counter (vm, node->node_index,
3197 IKEV2_ERROR_IKE_REQ_IGNORE
3199 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3204 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3207 vlib_node_increment_counter (vm, node->node_index,
3208 IKEV2_ERROR_MALFORMED_PACKET,
3216 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3219 ikev2_sa_free_all_child_sa (&sa0->childs);
3220 ikev2_child_sa_t *child;
3221 vec_add2 (sa0->childs, child, 1);
3222 clib_memset (child, 0, sizeof (*child));
3223 child->r_proposals = sa0->rekey[0].r_proposal;
3224 child->i_proposals = sa0->rekey[0].i_proposal;
3225 child->tsi = sa0->rekey[0].tsi;
3226 child->tsr = sa0->rekey[0].tsr;
3227 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3228 child - sa0->childs, 1);
3230 if (ike_hdr_is_response (ike0))
3232 vec_free (sa0->rekey);
3236 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3237 slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0);
3239 vlib_node_increment_counter (vm, node->node_index,
3240 IKEV2_ERROR_NO_BUFF_SPACE,
3248 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3252 /* if we are sending packet back, rewrite headers */
3253 if (slen && ~0 != slen)
3257 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3258 ikev2_rewrite_v4_addrs (sa0, ip40);
3262 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3263 ikev2_rewrite_v6_addrs (sa0, ip60);
3268 udp0->dst_port = udp0->src_port =
3269 clib_net_to_host_u16 (ikev2_get_port (sa0));
3271 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3272 && ikev2_natt_active (sa0))
3274 if (!has_non_esp_marker)
3275 slen = ikev2_insert_non_esp_marker (ike0, slen);
3280 if (has_non_esp_marker)
3281 slen += sizeof (ikev2_non_esp_marker);
3283 u16 tp = udp0->dst_port;
3284 udp0->dst_port = udp0->src_port;
3285 udp0->src_port = tp;
3288 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3290 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3293 ip40->length = clib_host_to_net_u16 (b0->current_length);
3294 ip40->checksum = ip4_header_checksum (ip40);
3298 ip60->payload_length =
3299 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3303 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3304 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3306 ikev2_child_sa_t *c;
3308 vec_foreach (c, sa0->childs)
3309 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3311 ikev2_delete_sa (ptd, sa0);
3313 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3314 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3317 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3318 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3319 t->next_index = next[0];
3326 vlib_node_increment_counter (vm, node->node_index,
3327 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3328 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3329 return frame->n_vectors;
3333 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3335 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */ );
3339 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3341 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */ );
3345 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3346 .function = ikev2_ip4,
3347 .name = "ikev2-ip4",
3348 .vector_size = sizeof (u32),
3349 .format_trace = format_ikev2_trace,
3350 .type = VLIB_NODE_TYPE_INTERNAL,
3352 .n_errors = ARRAY_LEN(ikev2_error_strings),
3353 .error_strings = ikev2_error_strings,
3355 .n_next_nodes = IKEV2_IP4_N_NEXT,
3357 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3358 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3362 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3363 .function = ikev2_ip6,
3364 .name = "ikev2-ip6",
3365 .vector_size = sizeof (u32),
3366 .format_trace = format_ikev2_trace,
3367 .type = VLIB_NODE_TYPE_INTERNAL,
3369 .n_errors = ARRAY_LEN(ikev2_error_strings),
3370 .error_strings = ikev2_error_strings,
3372 .n_next_nodes = IKEV2_IP6_N_NEXT,
3374 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3375 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3380 // set ikev2 proposals when vpp is used as initiator
3381 static clib_error_t *
3382 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3383 ikev2_transforms_set * ts,
3384 ikev2_sa_proposal_t ** proposals, int is_ike)
3387 ikev2_main_t *km = &ikev2_main;
3388 ikev2_sa_proposal_t *proposal;
3389 vec_add2 (*proposals, proposal, 1);
3390 ikev2_sa_transform_t *td;
3395 vec_foreach (td, km->supported_transforms)
3397 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3398 && td->encr_type == ts->crypto_alg
3399 && td->key_len == ts->crypto_key_size / 8)
3402 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3403 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3404 vec_add (td->attrs, (u8 *) attr, 4);
3405 vec_add1 (proposal->transforms, *td);
3414 r = clib_error_return (0, "Unsupported algorithm");
3418 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3422 vec_foreach (td, km->supported_transforms)
3424 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3425 && td->integ_type == ts->integ_alg)
3427 vec_add1 (proposal->transforms, *td);
3435 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3436 r = clib_error_return (0, "Unsupported algorithm");
3445 vec_foreach (td, km->supported_transforms)
3447 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3448 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3450 vec_add1 (proposal->transforms, *td);
3457 r = clib_error_return (0, "Unsupported algorithm");
3466 vec_foreach (td, km->supported_transforms)
3468 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3470 vec_add1 (proposal->transforms, *td);
3473 sa->dh_group = td->dh_type;
3481 r = clib_error_return (0, "Unsupported algorithm");
3489 vec_foreach (td, km->supported_transforms)
3491 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3493 vec_add1 (proposal->transforms, *td);
3499 r = clib_error_return (0, "Unsupported algorithm");
3508 static ikev2_profile_t *
3509 ikev2_profile_index_by_name (u8 * name)
3511 ikev2_main_t *km = &ikev2_main;
3514 p = mhash_get (&km->profile_index_by_name, name);
3518 return pool_elt_at_index (km->profiles, p[0]);
3523 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3524 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3533 b0 = vlib_get_buffer (vm, bi0);
3534 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3535 udp0 = vlib_buffer_get_current (b0);
3536 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3537 udp0->src_port = clib_host_to_net_u16 (src_port);
3538 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3541 if (ip_addr_version (dst) == AF_IP4)
3543 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3544 ip40 = vlib_buffer_get_current (b0);
3545 ip40->ip_version_and_header_length = 0x45;
3547 ip40->fragment_id = 0;
3548 ip40->flags_and_fragment_offset = 0;
3550 ip40->protocol = IP_PROTOCOL_UDP;
3551 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3552 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3553 b0->current_length =
3554 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3555 ip40->length = clib_host_to_net_u16 (b0->current_length);
3556 ip40->checksum = ip4_header_checksum (ip40);
3560 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3561 ip60 = vlib_buffer_get_current (b0);
3563 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3564 ip60->ip_version_traffic_class_and_flow_label =
3565 clib_host_to_net_u32 (0x6 << 28);
3566 ip60->payload_length =
3567 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3568 ip60->protocol = IP_PROTOCOL_UDP;
3569 ip60->hop_limit = 0xff;
3570 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3571 sizeof (ip60->src_address));
3572 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3573 sizeof (ip60->src_address));
3576 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3577 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3578 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3580 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3581 ip4_lookup_node.index : ip6_lookup_node.index;
3583 /* send the request */
3584 f = vlib_get_frame_to_node (vm, next_index);
3585 to_next = vlib_frame_vector_args (f);
3588 vlib_put_frame_to_node (vm, next_index, f);
3593 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3596 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3601 *b = vlib_get_buffer (vm, bi0);
3606 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3608 ikev2_main_t *km = &ikev2_main;
3611 EVP_PKEY_free (km->pkey);
3612 km->pkey = ikev2_load_key_file (file);
3613 if (km->pkey == NULL)
3614 return clib_error_return (0, "load key '%s' failed", file);
3619 static_always_inline vnet_api_error_t
3620 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3622 ikev2_main_t *km = &ikev2_main;
3623 udp_dst_port_info_t *pi;
3625 uword *v = hash_get (km->udp_ports, port);
3626 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3630 /* IKE already uses this port, only increment reference counter */
3637 return VNET_API_ERROR_UDP_PORT_TAKEN;
3639 udp_register_dst_port (km->vlib_main, port,
3640 ipsec4_tun_input_node.index, 1);
3641 hash_set (km->udp_ports, port, 1);
3643 p->ipsec_over_udp_port = port;
3647 static_always_inline void
3648 ikev2_unregister_udp_port (ikev2_profile_t * p)
3650 ikev2_main_t *km = &ikev2_main;
3653 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3656 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3664 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3665 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3668 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3672 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3673 ikev2_main_per_thread_data_t * tkm,
3674 ikev2_sa_t * sa, u8 send_notification)
3676 ikev2_main_t *km = &ikev2_main;
3677 ip_address_t *src, *dst;
3679 ikev2_child_sa_t *c;
3681 /* Create the Initiator notification for IKE SA removal */
3686 vec_resize (sa->del, 1);
3687 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3688 sa->del->spi = sa->ispi;
3690 if (send_notification)
3692 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3695 ikev2_log_error ("buffer alloc failure");
3699 ike0 = vlib_buffer_get_current (b0);
3700 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3701 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3702 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3704 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3705 sa->last_init_msg_id += 1;
3706 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
3710 if (ikev2_natt_active (sa))
3711 len = ikev2_insert_non_esp_marker (ike0, len);
3713 if (sa->is_initiator)
3724 ikev2_send_ike (vm, src, dst, bi0, len,
3725 ikev2_get_port (sa), sa->dst_port, 0);
3729 /* delete local SA */
3730 vec_foreach (c, sa->childs)
3731 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3733 u64 rspi = sa->rspi;
3734 ikev2_sa_free_all_vec (sa);
3735 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3738 hash_unset (tkm->sa_by_rspi, rspi);
3739 pool_put (tkm->sas, sa);
3744 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3746 ikev2_main_per_thread_data_t *tkm;
3748 u32 pi = p - km->profiles;
3753 pool_foreach(sa, km->sais, ({
3754 if (pi == sa->profile_index)
3755 vec_add1 (del_sai, sa - km->sais);
3759 vec_foreach (sai, del_sai)
3761 sa = pool_elt_at_index (km->sais, sai[0]);
3762 ikev2_sa_free_all_vec (sa);
3763 hash_unset (km->sa_by_ispi, sa->ispi);
3764 pool_put (km->sais, sa);
3766 vec_reset_length (del_sai);
3768 vec_foreach (tkm, km->per_thread_data)
3771 pool_foreach (sa, tkm->sas, ({
3772 if (sa->profile_index != ~0 && pi == sa->profile_index)
3773 vec_add1 (del_sai, sa - tkm->sas);
3777 vec_foreach (sai, del_sai)
3779 sa = pool_elt_at_index (tkm->sas, sai[0]);
3780 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3783 vec_reset_length (del_sai);
3790 ikev2_profile_free (ikev2_profile_t * p)
3794 vec_free (p->auth.data);
3796 EVP_PKEY_free (p->auth.key);
3798 vec_free (p->loc_id.data);
3799 vec_free (p->rem_id.data);
3803 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3805 ikev2_main_t *km = &ikev2_main;
3810 if (ikev2_profile_index_by_name (name))
3811 return clib_error_return (0, "policy %v already exists", name);
3813 pool_get (km->profiles, p);
3814 clib_memset (p, 0, sizeof (*p));
3815 p->name = vec_dup (name);
3816 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3817 p->responder.sw_if_index = ~0;
3819 uword index = p - km->profiles;
3820 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3824 p = ikev2_profile_index_by_name (name);
3826 return clib_error_return (0, "policy %v does not exists", name);
3828 ikev2_unregister_udp_port (p);
3829 ikev2_cleanup_profile_sessions (km, p);
3831 ikev2_profile_free (p);
3832 pool_put (km->profiles, p);
3833 mhash_unset (&km->profile_index_by_name, name, 0);
3839 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3840 u8 * auth_data, u8 data_hex_format)
3845 p = ikev2_profile_index_by_name (name);
3849 r = clib_error_return (0, "unknown profile %v", name);
3854 EVP_PKEY_free (p->auth.key);
3855 vec_free (p->auth.data);
3857 p->auth.method = auth_method;
3858 p->auth.data = vec_dup (auth_data);
3859 p->auth.hex = data_hex_format;
3861 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3863 vec_add1 (p->auth.data, 0);
3864 p->auth.key = ikev2_load_cert_file (p->auth.data);
3865 if (p->auth.key == NULL)
3866 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3873 ikev2_is_id_supported (u8 id_type)
3875 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3876 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3877 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3878 id_type == IKEV2_ID_TYPE_ID_FQDN);
3882 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3888 if (!ikev2_is_id_supported (id_type))
3890 r = clib_error_return (0, "unsupported identity type %U",
3891 format_ikev2_id_type, id_type);
3895 p = ikev2_profile_index_by_name (name);
3899 r = clib_error_return (0, "unknown profile %v", name);
3905 vec_free (p->loc_id.data);
3906 p->loc_id.type = id_type;
3907 p->loc_id.data = vec_dup (data);
3911 vec_free (p->rem_id.data);
3912 p->rem_id.type = id_type;
3913 p->rem_id.data = vec_dup (data);
3919 static_always_inline void
3920 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3922 if (ip_addr_version (addr) == AF_IP4)
3923 ts->ts_type = TS_IPV4_ADDR_RANGE;
3925 ts->ts_type = TS_IPV6_ADDR_RANGE;
3928 static_always_inline void
3929 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
3930 const ip_address_t * end)
3932 ip_address_copy (&ts->start_addr, start);
3933 ip_address_copy (&ts->end_addr, end);
3937 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
3938 u16 start_port, u16 end_port, ip_address_t start_addr,
3939 ip_address_t end_addr, int is_local)
3944 p = ikev2_profile_index_by_name (name);
3948 r = clib_error_return (0, "unknown profile %v", name);
3952 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
3953 return clib_error_return (0, "IP address version mismatch!");
3957 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
3958 p->loc_ts.start_port = start_port;
3959 p->loc_ts.end_port = end_port;
3960 p->loc_ts.protocol_id = protocol_id;
3961 ikev2_set_ts_type (&p->loc_ts, &start_addr);
3965 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
3966 p->rem_ts.start_port = start_port;
3967 p->rem_ts.end_port = end_port;
3968 p->rem_ts.protocol_id = protocol_id;
3969 ikev2_set_ts_type (&p->rem_ts, &start_addr);
3977 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
3978 u32 sw_if_index, ip_address_t addr)
3983 p = ikev2_profile_index_by_name (name);
3987 r = clib_error_return (0, "unknown profile %v", name);
3991 p->responder.sw_if_index = sw_if_index;
3992 ip_address_copy (&p->responder.addr, &addr);
3998 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
3999 ikev2_transform_encr_type_t crypto_alg,
4000 ikev2_transform_integ_type_t integ_alg,
4001 ikev2_transform_dh_type_t dh_type,
4002 u32 crypto_key_size)
4007 p = ikev2_profile_index_by_name (name);
4011 r = clib_error_return (0, "unknown profile %v", name);
4015 p->ike_ts.crypto_alg = crypto_alg;
4016 p->ike_ts.integ_alg = integ_alg;
4017 p->ike_ts.dh_type = dh_type;
4018 p->ike_ts.crypto_key_size = crypto_key_size;
4023 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4024 ikev2_transform_encr_type_t crypto_alg,
4025 ikev2_transform_integ_type_t integ_alg,
4026 u32 crypto_key_size)
4031 p = ikev2_profile_index_by_name (name);
4035 r = clib_error_return (0, "unknown profile %v", name);
4039 p->esp_ts.crypto_alg = crypto_alg;
4040 p->esp_ts.integ_alg = integ_alg;
4041 p->esp_ts.crypto_key_size = crypto_key_size;
4046 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4047 u8 * name, u32 sw_if_index)
4052 p = ikev2_profile_index_by_name (name);
4056 r = clib_error_return (0, "unknown profile %v", name);
4060 p->tun_itf = sw_if_index;
4066 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4069 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4070 ikev2_main_t *km = &ikev2_main;
4071 vnet_api_error_t rv = 0;
4075 return VNET_API_ERROR_INVALID_VALUE;
4079 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4080 return VNET_API_ERROR_VALUE_EXIST;
4082 rv = ikev2_register_udp_port (p, port);
4086 v = hash_get (km->udp_ports, port);
4088 return VNET_API_ERROR_IKE_NO_PORT;
4090 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4091 return VNET_API_ERROR_INVALID_VALUE;
4093 ikev2_unregister_udp_port (p);
4099 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4101 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4106 r = clib_error_return (0, "unknown profile %v", name);
4115 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4116 u64 lifetime, u32 jitter, u32 handover,
4122 p = ikev2_profile_index_by_name (name);
4126 r = clib_error_return (0, "unknown profile %v", name);
4130 p->lifetime = lifetime;
4131 p->lifetime_jitter = jitter;
4132 p->handover = handover;
4133 p->lifetime_maxdata = maxdata;
4138 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4139 ip_address_t * out_addr)
4141 ip4_address_t *if_ip4;
4142 ip6_address_t *if_ip6;
4146 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4149 ip_address_set (out_addr, if_ip4, AF_IP4);
4155 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4158 ip_address_set (out_addr, if_ip6, AF_IP6);
4166 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4170 ikev2_main_t *km = &ikev2_main;
4174 int len = sizeof (ike_header_t), valid_ip = 0;
4175 ip_address_t if_ip = ip_address_initializer;
4177 p = ikev2_profile_index_by_name (name);
4181 r = clib_error_return (0, "unknown profile %v", name);
4185 if (p->responder.sw_if_index == ~0
4186 || ip_address_is_zero (&p->responder.addr))
4188 r = clib_error_return (0, "responder not set for profile %v", name);
4192 if (ikev2_get_if_address (p->responder.sw_if_index,
4193 ip_addr_version (&p->responder.addr), &if_ip))
4198 /* Prepare the SA and the IKE payload */
4200 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4201 ikev2_payload_chain_t *chain = 0;
4202 ikev2_payload_new_chain (chain);
4204 /* Build the IKE proposal payload */
4205 ikev2_sa_proposal_t *proposals = 0;
4206 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4207 proposals[0].proposal_num = 1;
4208 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4210 /* Add and then cleanup proposal data */
4211 ikev2_payload_add_sa (chain, proposals);
4212 ikev2_sa_free_proposal_vector (&proposals);
4214 sa.is_initiator = 1;
4215 sa.profile_index = p - km->profiles;
4216 sa.state = IKEV2_STATE_SA_INIT;
4217 sa.tun_itf = p->tun_itf;
4218 sa.udp_encap = p->udp_encap;
4219 if (p->natt_disabled)
4220 sa.natt_state = IKEV2_NATT_DISABLED;
4221 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4222 sa.is_tun_itf_set = 1;
4223 sa.initial_contact = 1;
4224 sa.dst_port = IKEV2_PORT;
4226 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4227 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4229 ikev2_sa_free_all_vec (&sa);
4230 ikev2_payload_destroy_chain (chain);
4231 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4234 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4235 ikev2_payload_add_nonce (chain, sa.i_nonce);
4237 /* Build the child SA proposal */
4238 vec_resize (sa.childs, 1);
4239 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4240 &sa.childs[0].i_proposals, 0);
4241 sa.childs[0].i_proposals[0].proposal_num = 1;
4242 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4243 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4244 sizeof (sa.childs[0].i_proposals[0].spi));
4246 /* Add NAT detection notification messages (mandatory) */
4247 u8 *nat_detection_sha1 =
4248 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4249 clib_host_to_net_u64 (sa.rspi),
4250 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4252 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4253 nat_detection_sha1);
4254 vec_free (nat_detection_sha1);
4255 nat_detection_sha1 =
4256 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4257 clib_host_to_net_u64 (sa.rspi),
4259 clib_host_to_net_u16 (sa.dst_port));
4260 ikev2_payload_add_notify (chain,
4261 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4262 nat_detection_sha1);
4263 vec_free (nat_detection_sha1);
4265 u8 *sig_hash_algo = vec_new (u8, 8);
4266 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4267 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4268 ikev2_payload_add_notify (chain,
4269 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4271 vec_free (sig_hash_algo);
4273 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4276 ikev2_sa_free_all_vec (&sa);
4277 ikev2_payload_destroy_chain (chain);
4278 char *errmsg = "buffer alloc failure";
4279 ikev2_log_error (errmsg);
4280 return clib_error_return (0, errmsg);
4282 ike0 = vlib_buffer_get_current (b0);
4284 /* Buffer update and boilerplate */
4285 len += vec_len (chain->data);
4286 ike0->nextpayload = chain->first_payload_type;
4287 ike0->length = clib_host_to_net_u32 (len);
4288 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4289 ikev2_payload_destroy_chain (chain);
4291 ike0->version = IKE_VERSION_2;
4292 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4293 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4294 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4297 sa.last_init_msg_id += 1;
4299 /* store whole IKE payload - needed for PSK auth */
4300 vec_reset_length (sa.last_sa_init_req_packet_data);
4301 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4303 /* add data to the SA then add it to the pool */
4304 ip_address_copy (&sa.iaddr, &if_ip);
4305 ip_address_copy (&sa.raddr, &p->responder.addr);
4306 sa.i_id.type = p->loc_id.type;
4307 sa.i_id.data = vec_dup (p->loc_id.data);
4308 sa.r_id.type = p->rem_id.type;
4309 sa.r_id.data = vec_dup (p->rem_id.data);
4310 sa.i_auth.method = p->auth.method;
4311 sa.i_auth.hex = p->auth.hex;
4312 sa.i_auth.data = vec_dup (p->auth.data);
4313 sa.sw_if_index = p->responder.sw_if_index;
4314 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4315 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4317 ikev2_initial_contact_cleanup (0, &sa);
4319 /* add SA to the pool */
4320 ikev2_sa_t *sa0 = 0;
4321 pool_get (km->sais, sa0);
4322 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4323 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4327 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4328 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4331 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4332 clib_host_to_net_u64 (sa0->ispi), 0,
4333 ip_addr_v4 (&p->responder.addr).as_u32,
4334 ip_addr_version (&p->responder.addr) == AF_IP4);
4339 clib_error_return (0, "interface %U does not have any IP address!",
4340 format_vnet_sw_if_index_name, vnet_get_main (),
4341 p->responder.sw_if_index);
4349 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4350 ikev2_child_sa_t * csa)
4352 /* Create the Initiator notification for child SA removal */
4353 ikev2_main_t *km = &ikev2_main;
4359 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4362 ikev2_log_error ("buffer alloc failure");
4366 ike0 = vlib_buffer_get_current (b0);
4367 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4368 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4369 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4371 vec_resize (sa->del, 1);
4372 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4373 sa->del->spi = csa->i_proposals->spi;
4374 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4375 sa->last_init_msg_id += 1;
4376 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4380 if (ikev2_natt_active (sa))
4381 len = ikev2_insert_non_esp_marker (ike0, len);
4382 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4383 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4385 /* delete local child SA */
4386 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4387 ikev2_sa_del_child_sa (sa, csa);
4391 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4394 ikev2_main_t *km = &ikev2_main;
4395 ikev2_main_per_thread_data_t *tkm;
4396 ikev2_sa_t *fsa = 0;
4397 ikev2_child_sa_t *fchild = 0;
4399 /* Search for the child SA */
4400 vec_foreach (tkm, km->per_thread_data)
4406 pool_foreach (sa, tkm->sas, ({
4407 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4417 if (!fchild || !fsa)
4419 r = clib_error_return (0, "Child SA not found");
4424 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4431 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4434 ikev2_main_t *km = &ikev2_main;
4435 ikev2_main_per_thread_data_t *tkm;
4436 ikev2_sa_t *fsa = 0;
4437 ikev2_main_per_thread_data_t *ftkm = 0;
4439 /* Search for the IKE SA */
4440 vec_foreach (tkm, km->per_thread_data)
4446 pool_foreach (sa, tkm->sas, ({
4447 if (sa->ispi == ispi)
4459 r = clib_error_return (0, "IKE SA not found");
4463 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4468 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4469 ikev2_child_sa_t * csa)
4471 /* Create the Initiator request for create child SA */
4477 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4480 ikev2_log_error ("buffer alloc failure");
4484 ike0 = vlib_buffer_get_current (b0);
4485 ike0->version = IKE_VERSION_2;
4486 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4487 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4488 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4489 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4490 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4491 sa->last_init_msg_id += 1;
4493 ikev2_rekey_t *rekey;
4494 vec_reset_length (sa->rekey);
4495 vec_add2 (sa->rekey, rekey, 1);
4496 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4499 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4500 rekey->spi = proposals[0].spi;
4501 rekey->ispi = csa->i_proposals->spi;
4502 len = ikev2_generate_message (b0, sa, ike0, proposals, 0);
4506 if (ikev2_natt_active (sa))
4507 len = ikev2_insert_non_esp_marker (ike0, len);
4508 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4509 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4510 vec_free (proposals);
4514 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4517 ikev2_main_t *km = &ikev2_main;
4518 ikev2_main_per_thread_data_t *tkm;
4519 ikev2_sa_t *fsa = 0;
4520 ikev2_child_sa_t *fchild = 0;
4522 /* Search for the child SA */
4523 vec_foreach (tkm, km->per_thread_data)
4529 pool_foreach (sa, tkm->sas, ({
4530 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4540 if (!fchild || !fsa)
4542 r = clib_error_return (0, "Child SA not found");
4547 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4554 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4556 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4560 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4562 u64 *ispi, *ispi_vec = 0;
4563 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4564 ikev2_main_t *km = &ikev2_main;
4565 ikev2_main_per_thread_data_t *tkm;
4566 p->responder.sw_if_index = ~0;
4568 vec_foreach (tkm, km->per_thread_data)
4571 pool_foreach (sa, tkm->sas, ({
4572 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4573 vec_add1 (sa_vec, sa);
4577 vec_foreach (sap, sa_vec)
4579 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4581 vec_reset_length (sa_vec);
4586 pool_foreach (sa, km->sais, ({
4587 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4588 vec_add1 (ispi_vec, sa->ispi);
4592 vec_foreach (ispi, ispi_vec)
4594 ikev2_del_sa_init_from_main (ispi);
4597 vec_free (ispi_vec);
4600 static clib_error_t *
4601 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4603 ikev2_main_t *km = &ikev2_main;
4610 pool_foreach (p, km->profiles, ({
4611 if (p->responder.sw_if_index == sw_if_index)
4612 ikev2_sa_del (p, sw_if_index);
4619 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4622 ikev2_init (vlib_main_t * vm)
4624 ikev2_main_t *km = &ikev2_main;
4625 vlib_thread_main_t *tm = vlib_get_thread_main ();
4628 clib_memset (km, 0, sizeof (ikev2_main_t));
4629 km->vnet_main = vnet_get_main ();
4632 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4633 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4634 ikev2_crypto_init (km);
4636 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4638 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4639 CLIB_CACHE_LINE_BYTES);
4640 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4642 ikev2_main_per_thread_data_t *ptd =
4643 vec_elt_at_index (km->per_thread_data, thread_id);
4645 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4647 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4648 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4649 ptd->hmac_ctx = HMAC_CTX_new ();
4651 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4652 ptd->evp_ctx = &ptd->_evp_ctx;
4653 HMAC_CTX_init (&(ptd->_hmac_ctx));
4654 ptd->hmac_ctx = &ptd->_hmac_ctx;
4658 km->sa_by_ispi = hash_create (0, sizeof (uword));
4659 km->sw_if_indices = hash_create (0, 0);
4660 km->udp_ports = hash_create (0, sizeof (uword));
4662 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4663 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4664 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4665 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4667 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4");
4668 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4670 ikev2_cli_reference ();
4672 km->log_level = IKEV2_LOG_ERROR;
4673 km->log_class = vlib_log_register_class ("ikev2", 0);
4678 VLIB_INIT_FUNCTION (ikev2_init) =
4680 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4685 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4688 ikev2_main_t *km = &ikev2_main;
4689 ikev2_profile_t *p = 0;
4690 vlib_main_t *vm = km->vlib_main;
4691 f64 now = vlib_time_now (vm);
4694 if (sa->profile_index != ~0)
4695 p = pool_elt_at_index (km->profiles, sa->profile_index);
4697 if (sa->is_initiator && p && csa->time_to_expiration
4698 && now > csa->time_to_expiration)
4700 if (!csa->is_expired || csa->rekey_retries > 0)
4702 ikev2_rekey_child_sa_internal (vm, sa, csa);
4703 csa->time_to_expiration = now + p->handover;
4704 csa->is_expired = 1;
4705 if (csa->rekey_retries == 0)
4707 csa->rekey_retries = 5;
4709 else if (csa->rekey_retries > 0)
4711 csa->rekey_retries--;
4712 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4713 csa->i_proposals->spi, csa->rekey_retries);
4714 if (csa->rekey_retries == 0)
4716 csa->rekey_retries = -1;
4723 csa->time_to_expiration = 0;
4724 ikev2_delete_child_sa_internal (vm, sa, csa);
4732 ipip_tunnel_t *ipip = NULL;
4733 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4734 if (~0 == sw_if_index)
4736 ip46_address_t local_ip;
4737 ip46_address_t remote_ip;
4738 if (sa->is_initiator)
4740 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4741 ip_addr_bytes (&sa->iaddr));
4742 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4743 ip_addr_bytes (&sa->raddr));
4747 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4748 ip_addr_bytes (&sa->raddr));
4749 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4750 ip_addr_bytes (&sa->iaddr));
4754 ipip_tunnel_key_t key = {
4757 .transport = IPIP_TRANSPORT_IP4,
4762 ipip = ipip_tunnel_db_find (&key);
4765 sw_if_index = ipip->sw_if_index;
4771 vec_add1 (sas_in, csa->remote_sa_id);
4772 vlib_worker_thread_barrier_sync (vm);
4773 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4774 csa->local_sa_id, sas_in);
4777 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4778 vlib_worker_thread_barrier_release (vm);
4785 ikev2_set_log_level (ikev2_log_level_t log_level)
4787 ikev2_main_t *km = &ikev2_main;
4789 if (log_level >= IKEV2_LOG_MAX)
4791 ikev2_log_error ("unknown logging level %d", log_level);
4795 km->log_level = log_level;
4800 ikev2_set_liveness_params (u32 period, u32 max_retries)
4802 ikev2_main_t *km = &ikev2_main;
4804 if (period == 0 || max_retries == 0)
4805 return clib_error_return (0, "invalid args");
4807 km->liveness_period = period;
4808 km->liveness_max_retries = max_retries;
4813 ikev2_profile_natt_disable (u8 * name)
4815 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4817 return clib_error_return (0, "unknown profile %v", name);
4819 p->natt_disabled = 1;
4824 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4826 ikev2_main_t *km = &ikev2_main;
4827 vlib_main_t *vm = km->vlib_main;
4828 ikev2_main_per_thread_data_t *tkm;
4829 ikev2_sa_t *fsa = 0;
4830 ikev2_profile_t *p = 0;
4831 ikev2_child_sa_t *fchild = 0;
4832 f64 now = vlib_time_now (vm);
4833 vlib_counter_t counts;
4835 /* Search for the SA and child SA */
4836 vec_foreach (tkm, km->per_thread_data)
4842 pool_foreach (sa, tkm->sas, ({
4843 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4852 vlib_get_combined_counter (&ipsec_sa_counters,
4853 ipsec_sa->stat_index, &counts);
4855 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4856 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4858 if (fchild && p && p->lifetime_maxdata)
4860 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4862 fchild->time_to_expiration = now;
4868 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4874 if (ip_address_is_zero (&sa->iaddr))
4876 p = pool_elt_at_index (km->profiles, sa->profile_index);
4877 if (!ikev2_get_if_address (p->responder.sw_if_index,
4878 ip_addr_version (&p->responder.addr),
4882 /* update NAT detection payload */
4884 ikev2_find_ike_notify_payload
4885 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4886 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4890 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4891 clib_host_to_net_u64 (sa->rspi),
4893 clib_host_to_net_u16 (IKEV2_PORT));
4894 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4899 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4902 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4903 clib_memcpy_fast (vlib_buffer_get_current (b),
4904 sa->last_sa_init_req_packet_data,
4905 vec_len (sa->last_sa_init_req_packet_data));
4907 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4908 vec_len (sa->last_sa_init_req_packet_data),
4909 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4913 ikev2_process_pending_sa_init (ikev2_main_t * km)
4920 hash_foreach (ispi, sai, km->sa_by_ispi,
4922 sa = pool_elt_at_index (km->sais, sai);
4923 if (sa->init_response_received)
4926 ikev2_process_pending_sa_init_one (km, sa);
4932 ikev2_send_informational_request (ikev2_sa_t * sa)
4934 ikev2_main_t *km = &ikev2_main;
4935 ip_address_t *src, *dst;
4942 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
4945 ikev2_log_error ("buffer alloc failure");
4949 ike0 = vlib_buffer_get_current (b0);
4950 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4951 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4952 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4953 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4955 sa->last_init_msg_id += 1;
4956 len = ikev2_generate_message (b0, sa, ike0, 0, 0);
4960 if (ikev2_natt_active (sa))
4961 len = ikev2_insert_non_esp_marker (ike0, len);
4963 if (sa->is_initiator)
4974 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
4975 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
4980 ikev2_disable_dpd (void)
4982 ikev2_main_t *km = &ikev2_main;
4983 km->dpd_disabled = 1;
4986 static_always_inline int
4987 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
4989 ikev2_main_t *km = &ikev2_main;
4990 vlib_main_t *vm = km->vlib_main;
4992 if (!sa->keys_generated)
4995 if (sa->liveness_retries >= km->liveness_max_retries)
4998 f64 now = vlib_time_now (vm);
5000 if (sa->liveness_period_check < now)
5002 sa->liveness_retries++;
5003 sa->liveness_period_check = now + km->liveness_period;
5004 ikev2_send_informational_request (sa);
5010 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5013 ikev2_main_t *km = &ikev2_main;
5014 ipsec_main_t *im = &ipsec_main;
5016 ikev2_child_sa_t *c;
5021 vlib_process_wait_for_event_or_clock (vm, 2);
5022 vlib_process_get_events (vm, NULL);
5024 /* process ike child sas */
5025 ikev2_main_per_thread_data_t *tkm;
5026 vec_foreach (tkm, km->per_thread_data)
5029 u32 *to_be_deleted = 0;
5032 pool_foreach (sa, tkm->sas, ({
5033 ikev2_child_sa_t *c;
5036 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5039 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5041 sa->old_remote_id_present = 0;
5045 sa->old_id_expiration -= 1;
5047 vec_foreach (c, sa->childs)
5048 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5050 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5051 vec_add1 (to_be_deleted, sa - tkm->sas);
5055 vec_foreach (sai, to_be_deleted)
5057 sa = pool_elt_at_index (tkm->sas, sai[0]);
5058 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5059 vec_foreach (c, sa->childs)
5061 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5062 ikev2_sa_del_child_sa (sa, c);
5064 ikev2_sa_free_all_vec (sa);
5065 hash_unset (tkm->sa_by_rspi, sa->rspi);
5066 pool_put (tkm->sas, sa);
5070 p = pool_elt_at_index (km->profiles, sa->profile_index);
5073 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5076 ikev2_log_error ("%U", format_clib_error, e);
5077 clib_error_free (e);
5082 vec_free (to_be_deleted);
5085 /* process ipsec sas */
5088 pool_foreach (sa, im->sad, ({
5089 ikev2_mngr_process_ipsec_sa(sa);
5093 ikev2_process_pending_sa_init (km);
5099 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5100 .function = ikev2_mngr_process_fn,
5101 .type = VLIB_NODE_TYPE_PROCESS,
5103 "ikev2-manager-process",
5106 VLIB_PLUGIN_REGISTER () = {
5107 .version = VPP_BUILD_VER,
5108 .description = "Internet Key Exchange (IKEv2) Protocol",
5113 * fd.io coding-style-patch-verification: ON
5116 * eval: (c-set-style "gnu")