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>
31 #include <plugins/ikev2/ikev2.api_enum.h>
33 #define IKEV2_LIVENESS_RETRIES 3
34 #define IKEV2_LIVENESS_PERIOD_CHECK 30
36 ikev2_main_t ikev2_main;
38 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
40 ikev2_child_sa_t * child);
42 #define ikev2_set_state(sa, v, ...) do { \
44 ikev2_elog_sa_state("ispi %lx SA state changed to " #v __VA_ARGS__, sa->ispi); \
54 format_ikev2_trace (u8 * s, va_list * args)
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
60 s = format (s, "ikev2: sw_if_index %d, next index %d",
61 t->sw_if_index, t->next_index);
65 #define IKEV2_GENERATE_SA_INIT_OK_str ""
66 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
67 "no DH group configured for IKE proposals!"
68 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
69 "DH group not supported!"
73 IKEV2_GENERATE_SA_INIT_OK,
74 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
75 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
76 } ikev2_generate_sa_error_t;
79 format_ikev2_gen_sa_error (u8 * s, va_list * args)
81 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
84 case IKEV2_GENERATE_SA_INIT_OK:
86 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
87 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
89 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
90 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
98 IKEV2_NEXT_IP4_LOOKUP,
99 IKEV2_NEXT_IP4_ERROR_DROP,
105 IKEV2_NEXT_IP6_LOOKUP,
106 IKEV2_NEXT_IP6_ERROR_DROP,
110 typedef u32 ikev2_non_esp_marker;
112 static_always_inline u16
113 ikev2_get_port (ikev2_sa_t * sa)
115 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
118 static_always_inline int
119 ikev2_insert_non_esp_marker (ike_header_t * ike, int len)
121 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
122 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
123 return len + sizeof (ikev2_non_esp_marker);
126 static ikev2_sa_transform_t *
127 ikev2_find_transform_data (ikev2_sa_transform_t * t)
129 ikev2_main_t *km = &ikev2_main;
130 ikev2_sa_transform_t *td;
132 vec_foreach (td, km->supported_transforms)
134 if (td->type != t->type)
137 if (td->transform_id != t->transform_id)
140 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
142 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
143 || t->attrs[1] != 14)
146 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
154 static ikev2_sa_proposal_t *
155 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
156 ikev2_protocol_id_t prot_id)
158 ikev2_sa_proposal_t *rv = 0;
159 ikev2_sa_proposal_t *proposal;
160 ikev2_sa_transform_t *transform, *new_t;
161 u8 mandatory_bitmap, optional_bitmap;
163 if (prot_id == IKEV2_PROTOCOL_IKE)
165 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
166 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
167 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
169 else if (prot_id == IKEV2_PROTOCOL_ESP)
171 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
172 (1 << IKEV2_TRANSFORM_TYPE_ESN);
173 optional_bitmap = mandatory_bitmap |
174 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
176 else if (prot_id == IKEV2_PROTOCOL_AH)
178 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
179 (1 << IKEV2_TRANSFORM_TYPE_ESN);
180 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
185 vec_add2 (rv, proposal, 1);
187 vec_foreach (proposal, proposals)
190 if (proposal->protocol_id != prot_id)
193 vec_foreach (transform, proposal->transforms)
195 if ((1 << transform->type) & bitmap)
198 if (ikev2_find_transform_data (transform))
200 bitmap |= 1 << transform->type;
201 vec_add2 (rv->transforms, new_t, 1);
202 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
203 new_t->attrs = vec_dup (transform->attrs);
207 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
208 (bitmap & ~optional_bitmap) == 0)
210 rv->proposal_num = proposal->proposal_num;
211 rv->protocol_id = proposal->protocol_id;
212 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
217 vec_free (rv->transforms);
226 ikev2_sa_transform_t *
227 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
228 ikev2_transform_type_t type)
230 ikev2_sa_transform_t *t;
235 vec_foreach (t, p->transforms)
238 return ikev2_find_transform_data (t);
244 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
248 vec_foreach (c, sa->childs)
250 ikev2_sa_proposal_t *proposal =
251 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
252 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
260 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
262 ikev2_sa_proposal_t *p;
263 ikev2_sa_transform_t *t;
270 vec_foreach (t, p->transforms)
274 vec_free (p->transforms);
280 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
282 ikev2_sa_free_proposal_vector (&c->r_proposals);
283 ikev2_sa_free_proposal_vector (&c->i_proposals);
293 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
296 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
302 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
304 ikev2_sa_free_child_sa (child);
305 vec_del1 (sa->childs, child - sa->childs);
309 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
311 vec_free (sa->i_nonce);
312 vec_free (sa->r_nonce);
314 vec_free (sa->dh_shared_key);
315 vec_free (sa->dh_private_key);
316 vec_free (sa->i_dh_data);
317 vec_free (sa->r_dh_data);
319 ikev2_sa_free_proposal_vector (&sa->r_proposals);
320 ikev2_sa_free_proposal_vector (&sa->i_proposals);
323 vec_free (sa->sk_ai);
324 vec_free (sa->sk_ar);
325 vec_free (sa->sk_ei);
326 vec_free (sa->sk_er);
327 vec_free (sa->sk_pi);
328 vec_free (sa->sk_pr);
330 vec_free (sa->i_id.data);
331 vec_free (sa->r_id.data);
333 vec_free (sa->i_auth.data);
335 EVP_PKEY_free (sa->i_auth.key);
336 vec_free (sa->r_auth.data);
338 EVP_PKEY_free (sa->r_auth.key);
342 vec_free (sa->rekey);
344 vec_free (sa->last_sa_init_req_packet_data);
345 vec_free (sa->last_sa_init_res_packet_data);
347 vec_free (sa->last_res_packet_data);
349 ikev2_sa_free_all_child_sa (&sa->childs);
353 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
357 ikev2_sa_free_all_vec (sa);
359 p = hash_get (ptd->sa_by_rspi, sa->rspi);
362 hash_unset (ptd->sa_by_rspi, sa->rspi);
363 pool_put (ptd->sas, sa);
367 static ikev2_generate_sa_error_t
368 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
370 ikev2_sa_transform_t *t = 0, *t2;
371 ikev2_main_t *km = &ikev2_main;
373 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
374 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
376 /* check if received DH group is on our list of supported groups */
377 vec_foreach (t2, km->supported_transforms)
379 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
388 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
389 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
392 if (sa->is_initiator)
395 RAND_bytes ((u8 *) & sa->ispi, 8);
398 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
399 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
404 RAND_bytes ((u8 *) & sa->rspi, 8);
407 sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
408 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
411 /* generate dh keys */
412 ikev2_generate_dh (sa, t);
414 return IKEV2_GENERATE_SA_INIT_OK;
418 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
420 ikev2_sa_transform_t *t = 0, *t2;
421 ikev2_main_t *km = &ikev2_main;
423 /*move some data to the new SA */
424 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
425 sa->i_nonce = _(sai->i_nonce);
426 sa->i_dh_data = _(sai->i_dh_data);
427 sa->dh_private_key = _(sai->dh_private_key);
428 ip_address_copy (&sa->iaddr, &sai->iaddr);
429 ip_address_copy (&sa->raddr, &sai->raddr);
430 sa->is_initiator = sai->is_initiator;
431 sa->i_id.type = sai->i_id.type;
432 sa->r_id.type = sai->r_id.type;
433 sa->profile_index = sai->profile_index;
434 sa->tun_itf = sai->tun_itf;
435 sa->is_tun_itf_set = sai->is_tun_itf_set;
436 if (sai->natt_state == IKEV2_NATT_DISABLED)
437 sa->natt_state = IKEV2_NATT_DISABLED;
438 sa->i_id.data = _(sai->i_id.data);
439 sa->r_id.data = _(sai->r_id.data);
440 sa->i_auth.method = sai->i_auth.method;
441 sa->i_auth.hex = sai->i_auth.hex;
442 sa->i_auth.data = _(sai->i_auth.data);
443 sa->i_auth.key = _(sai->i_auth.key);
444 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
445 sa->last_init_msg_id = sai->last_init_msg_id;
446 sa->childs = _(sai->childs);
447 sa->udp_encap = sai->udp_encap;
448 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
449 sa->dst_port = sai->dst_port;
450 sa->sw_if_index = sai->sw_if_index;
454 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
459 /* check if received DH group is on our list of supported groups */
460 vec_foreach (t2, km->supported_transforms)
462 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
471 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
476 /* generate dh keys */
477 ikev2_complete_dh (sa, t);
482 ikev2_calc_keys (ikev2_sa_t * sa)
485 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
488 u16 integ_key_len = 0, salt_len = 0;
489 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
491 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
493 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
495 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
498 integ_key_len = tr_integ->key_len;
500 salt_len = sizeof (u32);
502 vec_append (s, sa->i_nonce);
503 vec_append (s, sa->r_nonce);
504 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
506 /* Calculate S = Ni | Nr | SPIi | SPIr */
508 vec_add2 (s, tmp, 2 * sizeof (*spi));
510 spi[0] = clib_host_to_net_u64 (sa->ispi);
511 spi[1] = clib_host_to_net_u64 (sa->rspi);
513 /* calculate PRFplus */
515 int len = tr_prf->key_trunc + /* SK_d */
516 integ_key_len * 2 + /* SK_ai, SK_ar */
517 tr_encr->key_len * 2 + /* SK_ei, SK_er */
518 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
521 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
528 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
529 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
530 pos += tr_prf->key_trunc;
535 sa->sk_ai = vec_new (u8, integ_key_len);
536 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
537 pos += integ_key_len;
540 sa->sk_ar = vec_new (u8, integ_key_len);
541 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
542 pos += integ_key_len;
546 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
547 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
548 pos += tr_encr->key_len + salt_len;
551 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
552 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
553 pos += tr_encr->key_len + salt_len;
556 sa->sk_pi = vec_new (u8, tr_prf->key_len);
557 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
558 pos += tr_prf->key_len;
561 sa->sk_pr = vec_new (u8, tr_prf->key_len);
562 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
563 pos += tr_prf->key_len;
566 sa->keys_generated = 1;
570 ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
573 u16 integ_key_len = 0;
576 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
578 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
580 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
582 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
585 integ_key_len = ctr_integ->key_len;
587 salt_len = sizeof (u32);
589 vec_append (s, sa->i_nonce);
590 vec_append (s, sa->r_nonce);
591 /* calculate PRFplus */
593 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
595 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
600 child->sk_ei = vec_new (u8, ctr_encr->key_len);
601 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
602 pos += ctr_encr->key_len;
607 child->sk_ai = vec_new (u8, ctr_integ->key_len);
608 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
609 pos += ctr_integ->key_len;
613 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
618 child->sk_er = vec_new (u8, ctr_encr->key_len);
619 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
620 pos += ctr_encr->key_len;
625 child->sk_ar = vec_new (u8, integ_key_len);
626 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
627 pos += integ_key_len;
631 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
640 static_always_inline u8 *
641 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t * ia, u16 port)
643 const u32 max_buf_size =
644 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
645 u8 buf[max_buf_size];
646 u8 *res = vec_new (u8, 20);
648 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
649 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
650 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
651 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
652 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
657 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
660 const ike_ke_payload_header_t *ke = p;
661 u16 plen = clib_net_to_host_u16 (ke->length);
662 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
663 if (sizeof (*ke) > rlen)
666 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
667 vec_reset_length (ke_data[0]);
668 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
673 ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce)
675 const ike_payload_header_t *ikep = p;
676 u16 plen = clib_net_to_host_u16 (ikep->length);
677 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
678 clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
683 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
686 if (sizeof (*ikep) > rlen)
688 *plen = clib_net_to_host_u16 (ikep->length);
689 if (*plen < sizeof (*ikep) || *plen > rlen)
695 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
696 udp_header_t *udp, u32 len, u32 sw_if_index)
698 u8 nonce[IKEV2_NONCE_SIZE];
700 u8 payload = ike->nextpayload;
701 ike_payload_header_t *ikep;
704 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
705 "from ", clib_net_to_host_u64 (ike->ispi),
706 clib_net_to_host_u64 (ike->rspi),
707 ip_addr_v4 (&sa->iaddr).as_u32,
708 ip_addr_version (&sa->iaddr) == AF_IP4);
710 sa->ispi = clib_net_to_host_u64 (ike->ispi);
711 sa->sw_if_index = sw_if_index;
713 /* store whole IKE payload - needed for PSK auth */
714 vec_reset_length (sa->last_sa_init_req_packet_data);
715 vec_add (sa->last_sa_init_req_packet_data, ike, len);
717 if (len < sizeof (*ike))
720 len -= sizeof (*ike);
721 while (p < len && payload != IKEV2_PAYLOAD_NONE)
723 ikep = (ike_payload_header_t *) & ike->payload[p];
724 int current_length = len - p;
725 if (!ikev2_check_payload_length (ikep, current_length, &plen))
728 if (payload == IKEV2_PAYLOAD_SA)
730 ikev2_sa_free_proposal_vector (&sa->i_proposals);
731 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
733 else if (payload == IKEV2_PAYLOAD_KE)
735 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
739 else if (payload == IKEV2_PAYLOAD_NONCE)
741 vec_reset_length (sa->i_nonce);
742 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
743 vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep));
745 else if (payload == IKEV2_PAYLOAD_NOTIFY)
748 ikev2_parse_notify_payload (ikep, current_length);
749 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
751 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
753 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
755 if (sa->natt_state == IKEV2_NATT_ENABLED)
756 sa->natt_state = IKEV2_NATT_ACTIVE;
757 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
758 " behind NAT", sa->ispi);
762 else if (n->msg_type ==
763 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
765 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
767 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
769 if (sa->natt_state == IKEV2_NATT_ENABLED)
770 sa->natt_state = IKEV2_NATT_ACTIVE;
771 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
772 " (self) behind NAT", sa->ispi);
778 else if (payload == IKEV2_PAYLOAD_VENDOR)
780 ikev2_parse_vendor_payload (ikep);
784 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
786 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
788 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
789 sa->unsupported_cp = payload;
794 payload = ikep->nextpayload;
798 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
803 ikev2_process_sa_init_resp (vlib_main_t * vm,
804 ikev2_sa_t * sa, ike_header_t * ike,
805 udp_header_t * udp, u32 len)
807 u8 nonce[IKEV2_NONCE_SIZE];
809 u8 payload = ike->nextpayload;
810 ike_payload_header_t *ikep;
813 sa->ispi = clib_net_to_host_u64 (ike->ispi);
814 sa->rspi = clib_net_to_host_u64 (ike->rspi);
816 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
817 "from ", sa->ispi, sa->rspi,
818 ip_addr_v4 (&sa->raddr).as_u32,
819 ip_addr_version (&sa->raddr) == AF_IP4);
821 /* store whole IKE payload - needed for PSK auth */
822 vec_reset_length (sa->last_sa_init_res_packet_data);
823 vec_add (sa->last_sa_init_res_packet_data, ike, len);
825 if (sizeof (*ike) > len)
828 len -= sizeof (*ike);
829 while (p < len && payload != IKEV2_PAYLOAD_NONE)
831 int current_length = len - p;
832 ikep = (ike_payload_header_t *) & ike->payload[p];
833 if (!ikev2_check_payload_length (ikep, current_length, &plen))
836 if (payload == IKEV2_PAYLOAD_SA)
838 ikev2_sa_free_proposal_vector (&sa->r_proposals);
839 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
842 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
844 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
847 else if (payload == IKEV2_PAYLOAD_KE)
849 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
853 else if (payload == IKEV2_PAYLOAD_NONCE)
855 vec_reset_length (sa->r_nonce);
856 if (ikev2_parse_nonce_payload (ikep, current_length, nonce))
857 vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep));
859 else if (payload == IKEV2_PAYLOAD_NOTIFY)
862 ikev2_parse_notify_payload (ikep, current_length);
863 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
865 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
868 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
870 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
871 " behind NAT, unsupported", sa->ispi);
875 else if (n->msg_type ==
876 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
878 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
881 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
883 if (sa->natt_state == IKEV2_NATT_ENABLED)
884 sa->natt_state = IKEV2_NATT_ACTIVE;
885 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
886 " (self) behind NAT", sa->ispi);
892 else if (payload == IKEV2_PAYLOAD_VENDOR)
894 ikev2_parse_vendor_payload (ikep);
898 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
900 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
902 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
903 sa->unsupported_cp = payload;
908 payload = ikep->nextpayload;
914 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
915 u8 * payload, u32 rlen, u32 * out_len)
917 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
919 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
920 ike_payload_header_t *ikep = 0;
923 ikev2_sa_transform_t *tr_integ;
924 ikev2_sa_transform_t *tr_encr;
926 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
928 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
929 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
931 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
934 if (rlen <= sizeof (*ike))
937 int len = rlen - sizeof (*ike);
939 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
941 ikep = (ike_payload_header_t *) & ike->payload[p];
942 int current_length = len - p;
943 if (!ikev2_check_payload_length (ikep, current_length, &plen))
946 if (*payload == IKEV2_PAYLOAD_SK)
948 last_payload = *payload;
952 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
954 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
956 sa->unsupported_cp = *payload;
961 *payload = ikep->nextpayload;
965 if (last_payload != IKEV2_PAYLOAD_SK)
967 ikev2_elog_error ("Last payload must be SK");
973 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
976 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
977 u8 *aad = (u8 *) ike;
978 u32 aad_len = ikep->payload - aad;
979 u8 *tag = ikep->payload + plen;
981 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
982 plen, aad, aad_len, tag, &dlen);
986 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
991 if (rlen < tr_integ->key_trunc)
995 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
996 (u8 *) ike, rlen - tr_integ->key_trunc);
998 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1001 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1003 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1005 ikev2_elog_error ("message integrity check failed");
1011 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1016 plaintext = ikep->payload + tr_encr->block_size;
1023 static_always_inline int
1024 ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2)
1026 if (i1->type != i2->type)
1029 if (vec_len (i1->data) != vec_len (i2->data))
1032 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1039 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1042 ikev2_main_t *km = &ikev2_main;
1045 ikev2_child_sa_t *c;
1047 /* find old IKE SAs with the same authenticated identity */
1049 pool_foreach (tmp, ptd->sas) {
1050 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1051 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1054 if (sa->rspi != tmp->rspi)
1055 vec_add1(delete, tmp - ptd->sas);
1059 for (i = 0; i < vec_len (delete); i++)
1061 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1062 vec_foreach (c, tmp->childs)
1064 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1066 ikev2_delete_sa (ptd, tmp);
1070 sa->initial_contact = 0;
1074 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1077 ikev2_main_t *km = &ikev2_main;
1079 if (!sa->initial_contact)
1084 ikev2_initial_contact_cleanup_internal (ptd, sa);
1088 vec_foreach (ptd, km->per_thread_data)
1089 ikev2_initial_contact_cleanup_internal (ptd, sa);
1091 sa->initial_contact = 0;
1095 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1097 const ike_id_payload_header_t *id = p;
1098 u16 plen = clib_net_to_host_u16 (id->length);
1099 if (plen < sizeof (*id) || plen > rlen)
1102 sa_id->type = id->id_type;
1103 vec_reset_length (sa_id->data);
1104 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1110 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1112 const ike_auth_payload_header_t *ah = p;
1113 u16 plen = clib_net_to_host_u16 (ah->length);
1115 a->method = ah->auth_method;
1116 vec_reset_length (a->data);
1117 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1122 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1123 ike_header_t * ike, u32 len)
1126 ikev2_child_sa_t *first_child_sa;
1127 u8 payload = ike->nextpayload;
1129 ike_payload_header_t *ikep;
1133 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1134 "from ", clib_host_to_net_u64 (ike->ispi),
1135 clib_host_to_net_u64 (ike->rspi),
1137 ip_addr_v4 (&sa->raddr).as_u32 :
1138 ip_addr_v4 (&sa->iaddr).as_u32,
1139 ip_addr_version (&sa->raddr) == AF_IP4);
1141 ikev2_calc_keys (sa);
1143 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1147 if (sa->unsupported_cp)
1149 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1155 /* select or create 1st child SA */
1156 if (sa->is_initiator)
1158 first_child_sa = &sa->childs[0];
1162 ikev2_sa_free_all_child_sa (&sa->childs);
1163 vec_add2 (sa->childs, first_child_sa, 1);
1167 /* process encrypted payload */
1168 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1170 ikep = (ike_payload_header_t *) & plaintext[p];
1171 int current_length = dlen - p;
1172 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1175 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1177 if (sa->is_initiator)
1179 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1180 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1185 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1186 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1190 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1192 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1195 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1197 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1200 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1202 if (sa->is_initiator)
1204 if (!ikev2_parse_auth_payload (ikep, current_length,
1210 if (!ikev2_parse_auth_payload (ikep, current_length,
1215 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1218 ikev2_parse_notify_payload (ikep, current_length);
1219 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1221 sa->initial_contact = 1;
1225 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1227 ikev2_parse_vendor_payload (ikep);
1229 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1231 vec_free (first_child_sa->tsi);
1232 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1234 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1236 vec_free (first_child_sa->tsr);
1237 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1241 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1244 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1246 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1247 sa->unsupported_cp = payload;
1252 payload = ikep->nextpayload;
1259 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1264 ikev2_process_informational_req (vlib_main_t * vm,
1265 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1268 u8 payload = ike->nextpayload;
1270 ike_payload_header_t *ikep;
1272 ikev2_notify_t *n = 0;
1274 sa->liveness_retries = 0;
1275 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1276 "from ", clib_host_to_net_u64 (ike->ispi),
1277 clib_host_to_net_u64 (ike->rspi),
1278 ip_addr_v4 (&sa->iaddr).as_u32,
1279 ip_addr_version (&sa->iaddr) == AF_IP4);
1281 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1286 /* process encrypted payload */
1288 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1290 u32 current_length = dlen - p;
1291 if (p + sizeof (*ikep) > dlen)
1294 ikep = (ike_payload_header_t *) & plaintext[p];
1295 u16 plen = clib_net_to_host_u16 (ikep->length);
1297 if (plen < sizeof (*ikep) || plen > current_length)
1300 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1302 n = ikev2_parse_notify_payload (ikep, current_length);
1305 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1306 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1309 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1311 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1313 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1315 ikev2_parse_vendor_payload (ikep);
1319 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1321 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1323 sa->unsupported_cp = payload;
1327 payload = ikep->nextpayload;
1334 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1335 ikev2_sa_t * sa, ike_header_t * ike,
1339 u8 payload = ike->nextpayload;
1342 u8 nonce[IKEV2_NONCE_SIZE];
1343 ikev2_rekey_t *rekey;
1344 ike_payload_header_t *ikep;
1345 ikev2_notify_t *n = 0;
1346 ikev2_ts_t *tsi = 0;
1347 ikev2_ts_t *tsr = 0;
1348 ikev2_sa_proposal_t *proposal = 0;
1349 ikev2_child_sa_t *child_sa;
1353 if (sa->is_initiator)
1354 src = ip_addr_v4 (&sa->raddr).as_u32;
1356 src = ip_addr_v4 (&sa->iaddr).as_u32;
1358 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1359 clib_host_to_net_u64 (ike->ispi),
1360 clib_host_to_net_u64 (ike->rspi), src,
1361 ip_addr_version (&sa->raddr) == AF_IP4);
1363 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1366 goto cleanup_and_exit;
1368 /* process encrypted payload */
1370 while (payload != IKEV2_PAYLOAD_NONE)
1372 ikep = (ike_payload_header_t *) & plaintext[p];
1373 int current_length = dlen - p;
1374 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1375 goto cleanup_and_exit;
1377 if (payload == IKEV2_PAYLOAD_SA)
1379 proposal = ikev2_parse_sa_payload (ikep, current_length);
1381 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1383 n = ikev2_parse_notify_payload (ikep, current_length);
1384 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1389 else if (payload == IKEV2_PAYLOAD_DELETE)
1391 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1393 else if (payload == IKEV2_PAYLOAD_VENDOR)
1395 ikev2_parse_vendor_payload (ikep);
1397 else if (payload == IKEV2_PAYLOAD_NONCE)
1399 ikev2_parse_nonce_payload (ikep, current_length, nonce);
1401 else if (payload == IKEV2_PAYLOAD_TSI)
1403 tsi = ikev2_parse_ts_payload (ikep, current_length);
1405 else if (payload == IKEV2_PAYLOAD_TSR)
1407 tsr = ikev2_parse_ts_payload (ikep, current_length);
1411 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1413 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1415 sa->unsupported_cp = payload;
1416 goto cleanup_and_exit;
1419 payload = ikep->nextpayload;
1423 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP)
1424 goto cleanup_and_exit;
1426 if (sa->is_initiator)
1429 if (vec_len (rekey) == 0)
1430 goto cleanup_and_exit;
1431 rekey->protocol_id = proposal->protocol_id;
1433 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1434 rekey->i_proposal->spi = rekey->spi;
1435 rekey->r_proposal = proposal;
1439 vec_reset_length (sa->r_nonce);
1440 vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1441 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1444 child_sa->rekey_retries = 0;
1451 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1454 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1456 goto cleanup_and_exit;
1458 vec_add2 (sa->rekey, rekey, 1);
1459 rekey->protocol_id = n->protocol_id;
1460 rekey->spi = n->spi;
1461 rekey->i_proposal = proposal;
1463 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1465 vec_reset_length (sa->i_nonce);
1466 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1467 /* generate new Nr */
1468 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1469 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1473 /* create new child SA */
1474 vec_add2 (sa->new_child, rekey, 1);
1475 rekey->i_proposal = proposal;
1477 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1479 vec_reset_length (sa->i_nonce);
1480 vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1481 /* generate new Nr */
1482 vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1);
1483 RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1493 vec_free (proposal);
1500 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1508 ikev2_sa_transform_t *tr_prf;
1511 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1517 nonce = sa->i_nonce;
1518 packet_data = sa->last_sa_init_res_packet_data;
1524 nonce = sa->r_nonce;
1525 packet_data = sa->last_sa_init_req_packet_data;
1528 data = vec_new (u8, 4);
1530 vec_append (data, id->data);
1532 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1533 vec_append (authmsg, packet_data);
1534 vec_append (authmsg, nonce);
1535 vec_append (authmsg, id_hash);
1543 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1545 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1546 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1547 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1548 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1555 ikev2_sa_match_ts (ikev2_sa_t * sa)
1557 ikev2_main_t *km = &ikev2_main;
1559 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1560 ikev2_id_t *id_rem, *id_loc;
1563 pool_foreach (p, km->profiles) {
1565 if (sa->is_initiator)
1581 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1582 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1585 sa->profile_index = p - km->profiles;
1587 vec_foreach(ts, sa->childs[0].tsi)
1589 if (ikev2_ts_cmp(p_tsi, ts))
1591 vec_add1 (tsi, ts[0]);
1596 vec_foreach(ts, sa->childs[0].tsr)
1598 if (ikev2_ts_cmp(p_tsr, ts))
1600 vec_add1 (tsr, ts[0]);
1611 vec_free (sa->childs[0].tsi);
1612 vec_free (sa->childs[0].tsr);
1613 sa->childs[0].tsi = tsi;
1614 sa->childs[0].tsr = tsr;
1620 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1625 ikev2_sa_auth (ikev2_sa_t * sa)
1627 ikev2_main_t *km = &ikev2_main;
1628 ikev2_profile_t *p, *sel_p = 0;
1629 u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1630 ikev2_sa_transform_t *tr_prf;
1633 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1635 /* only shared key and rsa signature */
1636 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1637 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1639 ikev2_elog_uint (IKEV2_LOG_ERROR,
1640 "unsupported authentication method %u",
1642 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1646 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1647 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1649 ikev2_id_t *id_rem, *id_loc;
1650 ikev2_auth_t *sa_auth;
1652 if (sa->is_initiator)
1656 sa_auth = &sa->r_auth;
1662 sa_auth = &sa->i_auth;
1666 pool_foreach (p, km->profiles) {
1669 if (!ikev2_is_id_equal (&p->rem_id, id_rem)
1670 || !ikev2_is_id_equal (&p->loc_id, id_loc))
1673 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1675 if (!p->auth.data ||
1676 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1679 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1680 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1682 if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1684 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1691 ikev2_elog_uint (IKEV2_LOG_ERROR, "shared key mismatch! ispi %lx",
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);
1708 ikev2_elog_uint (IKEV2_LOG_ERROR,
1709 "cert verification failed! ispi %lx", sa->ispi);
1720 sa->udp_encap = sel_p->udp_encap;
1721 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1725 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1727 if (!sa->is_initiator)
1729 vec_free (sa->r_id.data);
1730 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1731 sa->r_id.type = sel_p->loc_id.type;
1732 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1733 sa->i_id.type = sel_p->rem_id.type;
1735 /* generate our auth data */
1736 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1737 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1739 vec_free (sa->r_auth.data);
1740 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1741 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1743 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1745 vec_free (sa->r_auth.data);
1746 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1747 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1751 /* select transforms for 1st child sa */
1752 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1753 sa->childs[0].r_proposals =
1754 ikev2_select_proposal (sa->childs[0].i_proposals,
1755 IKEV2_PROTOCOL_ESP);
1757 if (~0 != sel_p->tun_itf)
1759 sa->is_tun_itf_set = 1;
1760 sa->tun_itf = sel_p->tun_itf;
1766 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1767 "profile found! ispi %lx", sa->ispi);
1768 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1776 ikev2_sa_auth_init (ikev2_sa_t * sa)
1778 ikev2_main_t *km = &ikev2_main;
1779 u8 *authmsg, *key_pad, *psk = 0;
1780 ikev2_sa_transform_t *tr_prf;
1783 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1785 /* only shared key and rsa signature */
1786 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1787 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1789 ikev2_elog_uint (IKEV2_LOG_ERROR,
1790 "unsupported authentication method %u",
1792 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1796 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1797 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1798 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1800 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1802 vec_free (sa->i_auth.data);
1803 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1804 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1806 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1808 vec_free (sa->i_auth.data);
1809 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1810 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1819 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1821 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1825 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1827 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1837 ipsec_sa_flags_t flags;
1840 ipsec_crypto_alg_t encr_type;
1841 ipsec_integ_alg_t integ_type;
1842 ip_address_t local_ip;
1843 ip_address_t remote_ip;
1844 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1846 u32 old_remote_sa_id;
1847 u16 ipsec_over_udp_port;
1850 } ikev2_add_ipsec_tunnel_args_t;
1853 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1855 ikev2_main_t *km = &ikev2_main;
1859 .t_flags = TUNNEL_FLAG_NONE,
1860 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1862 .t_mode = TUNNEL_MODE_P2P,
1865 .t_src = a->local_ip,
1866 .t_dst = a->remote_ip,
1868 tunnel_t tun_out = {
1869 .t_flags = TUNNEL_FLAG_NONE,
1870 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1872 .t_mode = TUNNEL_MODE_P2P,
1875 .t_src = a->remote_ip,
1876 .t_dst = a->local_ip,
1879 if (~0 == a->sw_if_index)
1881 /* no tunnel associated with the SA/profile - create a new one */
1882 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1883 &ip_addr_46 (&a->remote_ip), 0,
1884 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1885 TUNNEL_MODE_P2P, &sw_if_index);
1887 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1889 if (hash_get (km->sw_if_indices, sw_if_index))
1890 /* interface is managed by IKE; proceed with updating SAs */
1893 hash_set1 (km->sw_if_indices, sw_if_index);
1897 sw_if_index = a->sw_if_index;
1898 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1903 ikev2_elog_uint (IKEV2_LOG_ERROR,
1904 "installing ipip tunnel failed! local spi: %x",
1910 vec_add1 (sas_in, a->remote_sa_id);
1913 ipsec_tun_protect_del (sw_if_index, NULL);
1915 /* replace local SA immediately */
1916 ipsec_sa_unlock_id (a->local_sa_id);
1918 /* keep the old sa */
1919 vec_add1 (sas_in, a->old_remote_sa_id);
1922 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1923 a->encr_type, &a->loc_ckey, a->integ_type,
1924 &a->loc_ikey, a->flags, a->salt_local,
1925 a->src_port, a->dst_port, &tun_out, NULL);
1929 rv = ipsec_sa_add_and_lock (
1930 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1931 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1932 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1933 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
1937 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1944 ipsec_sa_unlock_id (a->remote_sa_id);
1946 ipsec_sa_unlock_id (a->local_sa_id);
1952 ikev2_create_tunnel_interface (vlib_main_t * vm,
1954 ikev2_child_sa_t * child, u32 sa_index,
1955 u32 child_index, u8 is_rekey)
1957 u32 thread_index = vlib_get_thread_index ();
1958 ikev2_main_t *km = &ikev2_main;
1959 ipsec_crypto_alg_t encr_type;
1960 ipsec_integ_alg_t integ_type;
1961 ikev2_profile_t *p = 0;
1962 ikev2_sa_transform_t *tr;
1963 ikev2_sa_proposal_t *proposals;
1965 ikev2_add_ipsec_tunnel_args_t a;
1967 clib_memset (&a, 0, sizeof (a));
1969 if (!child->r_proposals)
1971 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1975 if (sa->is_initiator)
1977 ip_address_copy (&a.local_ip, &sa->iaddr);
1978 ip_address_copy (&a.remote_ip, &sa->raddr);
1979 proposals = child->r_proposals;
1980 a.local_spi = child->r_proposals[0].spi;
1981 a.remote_spi = child->i_proposals[0].spi;
1985 ip_address_copy (&a.local_ip, &sa->raddr);
1986 ip_address_copy (&a.remote_ip, &sa->iaddr);
1987 proposals = child->i_proposals;
1988 a.local_spi = child->i_proposals[0].spi;
1989 a.remote_spi = child->r_proposals[0].spi;
1992 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1995 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1996 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1998 if (ikev2_natt_active (sa))
1999 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2000 a.is_rekey = is_rekey;
2002 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2003 if (tr && tr->esn_type)
2004 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2006 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2009 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2011 switch (tr->key_len)
2014 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2017 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2020 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2023 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2028 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2031 switch (tr->key_len)
2034 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2037 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2040 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2043 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2051 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2057 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2060 a.encr_type = encr_type;
2064 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2067 switch (tr->integ_type)
2069 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2070 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2072 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2073 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2075 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2076 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2078 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2079 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2082 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2088 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2094 integ_type = IPSEC_INTEG_ALG_NONE;
2097 a.integ_type = integ_type;
2098 ikev2_calc_child_keys (sa, child);
2100 if (sa->is_initiator)
2102 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2103 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2104 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2105 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2108 a.salt_remote = child->salt_er;
2109 a.salt_local = child->salt_ei;
2111 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2115 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2116 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2117 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2118 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2121 a.salt_remote = child->salt_ei;
2122 a.salt_local = child->salt_er;
2125 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2126 a.src_port = sa->ipsec_over_udp_port;
2129 if (sa->is_initiator && sa->profile_index != ~0)
2130 p = pool_elt_at_index (km->profiles, sa->profile_index);
2132 if (p && p->lifetime)
2134 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2135 if (p->lifetime_jitter)
2137 // This is not much better than rand(3), which Coverity warns
2138 // is unsuitable for security applications; random_u32 is
2139 // however fast. If this perturbance to the expiration time
2140 // needs to use a better RNG then we may need to use something
2141 // like /dev/urandom which has significant overhead.
2142 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2143 rnd = random_u32 (&rnd);
2145 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2149 if (thread_index & 0xffffffc0)
2150 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2152 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2153 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2155 child->local_sa_id =
2157 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2159 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2164 /* create a new remote SA ID to keep the old SA for a bit longer
2165 * so the peer has some time to swap their SAs */
2167 /* use most significat bit of child index part in id */
2169 if (sa->current_remote_id_mask)
2171 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2172 sa->current_remote_id_mask = 0;
2176 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2177 sa->current_remote_id_mask = mask;
2178 remote_sa_id |= mask;
2180 sa->old_id_expiration = 3.0;
2181 sa->old_remote_id_present = 1;
2184 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2186 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2187 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2189 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2190 (u8 *) & a, sizeof (a));
2196 ip46_address_t local_ip;
2197 ip46_address_t remote_ip;
2201 } ikev2_del_ipsec_tunnel_args_t;
2203 static_always_inline u32
2204 ikev2_flip_alternate_sa_bit (u32 id)
2213 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2215 ikev2_main_t *km = &ikev2_main;
2216 ipip_tunnel_t *ipip = NULL;
2219 if (~0 == a->sw_if_index)
2222 ipip_tunnel_key_t key = {
2224 .dst = a->remote_ip,
2225 .transport = IPIP_TRANSPORT_IP4,
2230 ipip = ipip_tunnel_db_find (&key);
2234 sw_if_index = ipip->sw_if_index;
2235 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2242 sw_if_index = a->sw_if_index;
2243 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2246 if (~0 != sw_if_index)
2247 ipsec_tun_protect_del (sw_if_index, NULL);
2249 ipsec_sa_unlock_id (a->remote_sa_id);
2250 ipsec_sa_unlock_id (a->local_sa_id);
2251 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2254 ipip_del_tunnel (ipip->sw_if_index);
2258 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2259 ikev2_child_sa_t * child)
2261 ikev2_del_ipsec_tunnel_args_t a;
2263 clib_memset (&a, 0, sizeof (a));
2265 if (sa->is_initiator)
2267 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2268 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2272 ip_address_to_46 (&sa->raddr, &a.local_ip);
2273 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2276 a.remote_sa_id = child->remote_sa_id;
2277 a.local_sa_id = child->local_sa_id;
2278 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2280 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2286 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2287 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2289 ikev2_main_t *km = &ikev2_main;
2290 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2292 ike_payload_header_t *ph;
2296 ikev2_sa_transform_t *tr_encr, *tr_integ;
2298 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2300 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2302 ikev2_payload_chain_t *chain = 0;
2303 ikev2_payload_new_chain (chain);
2305 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2307 if (sa->r_proposals == 0)
2309 ikev2_payload_add_notify (chain,
2310 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2311 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2313 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2315 u8 *data = vec_new (u8, 2);
2316 ikev2_sa_transform_t *tr_dh;
2318 ikev2_sa_get_td_for_type (sa->r_proposals,
2319 IKEV2_TRANSFORM_TYPE_DH);
2320 ASSERT (tr_dh && tr_dh->dh_type);
2322 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2323 data[1] = (tr_dh->dh_type) & 0xff;
2325 ikev2_payload_add_notify (chain,
2326 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2329 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2331 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2333 u8 *data = vec_new (u8, 1);
2335 data[0] = sa->unsupported_cp;
2336 ikev2_payload_add_notify (chain,
2337 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2345 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2346 ikev2_payload_add_sa (chain, sa->r_proposals);
2347 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2348 ikev2_payload_add_nonce (chain, sa->r_nonce);
2350 u8 *nat_detection_sha1 =
2351 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2352 clib_host_to_net_u64 (sa->rspi),
2353 &sa->raddr, udp->dst_port);
2354 ikev2_payload_add_notify (chain,
2355 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2356 nat_detection_sha1);
2357 vec_free (nat_detection_sha1);
2358 nat_detection_sha1 =
2359 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2360 clib_host_to_net_u64 (sa->rspi),
2361 &sa->iaddr, udp->src_port);
2362 ikev2_payload_add_notify (chain,
2363 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2364 nat_detection_sha1);
2365 vec_free (nat_detection_sha1);
2368 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2370 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2372 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2373 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2374 ikev2_payload_add_auth (chain, &sa->r_auth);
2375 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2376 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2377 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2379 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2381 ikev2_payload_add_notify (chain,
2382 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2384 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2386 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2388 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2390 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2391 ikev2_payload_add_auth (chain, &sa->r_auth);
2393 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2395 ikev2_payload_add_notify (chain,
2396 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2397 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2398 ikev2_payload_add_auth (chain, &sa->r_auth);
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);
2402 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2404 u8 *data = vec_new (u8, 1);
2406 data[0] = sa->unsupported_cp;
2407 ikev2_payload_add_notify (chain,
2408 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2412 else if (sa->state == IKEV2_STATE_SA_INIT)
2414 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2415 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2416 ikev2_payload_add_auth (chain, &sa->i_auth);
2417 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2418 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2419 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2420 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2425 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2429 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2431 /* if pending delete */
2434 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2436 if (ike_hdr_is_request (ike))
2437 ikev2_payload_add_delete (chain, sa->del);
2439 /* The response to a request that deletes the IKE SA is an empty
2440 INFORMATIONAL response. */
2441 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2443 /* The response to a request that deletes ESP or AH SAs will contain
2444 delete payloads for the paired SAs going in the other direction. */
2447 ikev2_payload_add_delete (chain, sa->del);
2452 /* received N(AUTHENTICATION_FAILED) */
2453 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2455 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2458 /* received unsupported critical payload */
2459 else if (sa->unsupported_cp)
2461 u8 *data = vec_new (u8, 1);
2463 data[0] = sa->unsupported_cp;
2464 ikev2_payload_add_notify (chain,
2465 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2468 sa->unsupported_cp = 0;
2471 /* else send empty response */
2473 if (ike_hdr_is_response (ike))
2475 ASSERT (stats != 0);
2476 stats->n_keepalives++;
2477 sa->stats.n_keepalives++;
2481 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2483 if (sa->is_initiator)
2486 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2487 ikev2_notify_t notify;
2488 u8 *data = vec_new (u8, 4);
2489 clib_memset (¬ify, 0, sizeof (notify));
2490 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2491 notify.spi = sa->childs[0].i_proposals->spi;
2492 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2494 ikev2_payload_add_sa (chain, proposals);
2495 ikev2_payload_add_nonce (chain, sa->i_nonce);
2496 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2497 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2498 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2503 else if (vec_len (sa->rekey) > 0)
2505 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2506 ikev2_payload_add_nonce (chain, sa->r_nonce);
2507 ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
2508 ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
2509 vec_del1 (sa->rekey, 0);
2511 else if (vec_len (sa->new_child) > 0)
2513 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2514 ikev2_payload_add_nonce (chain, sa->r_nonce);
2515 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2517 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2519 vec_del1 (sa->new_child, 0);
2521 else if (sa->unsupported_cp)
2523 u8 *data = vec_new (u8, 1);
2525 data[0] = sa->unsupported_cp;
2526 ikev2_payload_add_notify (
2527 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2529 sa->unsupported_cp = 0;
2533 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2539 ike->version = IKE_VERSION_2;
2540 ike->nextpayload = IKEV2_PAYLOAD_SK;
2541 tlen = sizeof (*ike);
2543 if (sa->is_initiator)
2544 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2546 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2548 tlen += vec_len (chain->data);
2549 ike->nextpayload = chain->first_payload_type;
2550 ike->length = clib_host_to_net_u32 (tlen);
2552 if (tlen + b->current_length + b->current_data > buffer_data_size)
2558 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2560 /* store whole IKE payload - needed for PSK auth */
2561 vec_reset_length (sa->last_sa_init_res_packet_data);
2562 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2566 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2567 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2570 plen = sizeof (*ph);
2571 ph = (ike_payload_header_t *) & ike->payload[0];
2572 ph->nextpayload = chain->first_payload_type;
2575 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2576 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2577 plen += vec_len (chain->data) + iv_len;
2579 /* add space for hmac/tag */
2581 plen += tr_integ->key_trunc;
2583 plen += IKEV2_GCM_ICV_SIZE;
2586 if (tlen + b->current_length + b->current_data > buffer_data_size)
2592 /* payload and total length */
2593 ph->length = clib_host_to_net_u16 (plen);
2594 ike->length = clib_host_to_net_u32 (tlen);
2598 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2599 ph->payload, (u8 *) ike,
2600 sizeof (*ike) + sizeof (*ph),
2601 ph->payload + plen - sizeof (*ph) -
2602 IKEV2_GCM_ICV_SIZE))
2610 if (!ikev2_encrypt_data
2611 (ptd, sa, tr_encr, chain->data, ph->payload))
2617 ikev2_calc_integr (tr_integ,
2618 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2619 (u8 *) ike, tlen - tr_integ->key_trunc);
2620 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2621 sizeof (*ike), integ, tr_integ->key_trunc);
2624 /* store whole IKE payload - needed for retransmit */
2625 vec_reset_length (sa->last_res_packet_data);
2626 vec_add (sa->last_res_packet_data, ike, tlen);
2630 ikev2_payload_destroy_chain (chain);
2636 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2637 ip_address_t iaddr, ip_address_t raddr,
2642 u8 payload = ike->nextpayload;
2644 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2645 ip_address_cmp (&sa->iaddr, &iaddr) ||
2646 ip_address_cmp (&sa->raddr, &raddr))
2651 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2653 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2654 u32 plen = clib_net_to_host_u16 (ikep->length);
2656 if (plen < sizeof (ike_payload_header_t))
2659 if (payload == IKEV2_PAYLOAD_NONCE &&
2660 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2662 /* req is retransmit */
2663 if (sa->state == IKEV2_STATE_SA_INIT)
2665 sa->stats.n_init_retransmit++;
2666 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2667 u32 slen = clib_net_to_host_u32 (tmp->length);
2668 ike->ispi = tmp->ispi;
2669 ike->rspi = tmp->rspi;
2670 ike->nextpayload = tmp->nextpayload;
2671 ike->version = tmp->version;
2672 ike->exchange = tmp->exchange;
2673 ike->flags = tmp->flags;
2674 ike->msgid = tmp->msgid;
2675 ike->length = tmp->length;
2676 clib_memcpy_fast (ike->payload, tmp->payload,
2677 slen - sizeof (*ike));
2678 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2679 "ispi %lx IKE_SA_INIT retransmit "
2680 "from %d.%d.%d.%d to %d.%d.%d.%d",
2682 ip_addr_v4 (&raddr).as_u32,
2683 ip_addr_v4 (&iaddr).as_u32);
2686 /* else ignore req */
2689 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2690 "ispi %lx IKE_SA_INIT ignore "
2691 "from %d.%d.%d.%d to %d.%d.%d.%d",
2693 ip_addr_v4 (&raddr).as_u32,
2694 ip_addr_v4 (&iaddr).as_u32);
2698 payload = ikep->nextpayload;
2706 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2707 ip_address_t raddr, u32 rlen)
2711 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2714 pool_foreach (sa, ptd->sas) {
2715 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2721 /* req is not retransmit */
2726 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2728 if (ike_hdr_is_response (ike))
2731 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2734 if (msg_id > sa->last_msg_id)
2736 sa->last_msg_id = msg_id;
2740 /* retransmitted req */
2741 if (msg_id == sa->last_msg_id)
2743 sa->stats.n_retransmit++;
2744 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2745 u32 slen = clib_net_to_host_u32 (tmp->length);
2746 ike->ispi = tmp->ispi;
2747 ike->rspi = tmp->rspi;
2748 ike->nextpayload = tmp->nextpayload;
2749 ike->version = tmp->version;
2750 ike->exchange = tmp->exchange;
2751 ike->flags = tmp->flags;
2752 ike->msgid = tmp->msgid;
2753 ike->length = tmp->length;
2754 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2755 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2756 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2757 ip_addr_v4 (&sa->iaddr).as_u32);
2761 /* old req ignore */
2762 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2763 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2764 ip_addr_v4 (&sa->iaddr).as_u32);
2769 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2771 ikev2_main_t *km = &ikev2_main;
2772 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2773 sa->profile_index = ~0;
2777 ikev2_del_sa_init_from_main (u64 * ispi)
2779 ikev2_main_t *km = &ikev2_main;
2780 uword *p = hash_get (km->sa_by_ispi, *ispi);
2783 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2784 hash_unset (km->sa_by_ispi, sai->ispi);
2785 ikev2_sa_free_all_vec (sai);
2786 pool_put (km->sais, sai);
2791 ikev2_del_sa_init (u64 ispi)
2793 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2797 static_always_inline void
2798 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2800 if (sa->is_initiator)
2802 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2803 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2807 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2808 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2812 static_always_inline void
2813 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2815 if (sa->is_initiator)
2817 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2818 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2822 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2823 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2827 static_always_inline void
2828 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2829 const ip_address_family_t af)
2831 ip_address_set (&sa->raddr, raddr, af);
2832 ip_address_set (&sa->iaddr, iaddr, af);
2836 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2837 ip6_header_t * ip6, u8 is_ip4)
2842 src = ip4->src_address.as_u32;
2843 dst = ip4->dst_address.as_u32;
2847 src = ip6->src_address.as_u32[3];
2848 dst = ip6->dst_address.as_u32[3];
2850 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2851 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2852 exchange, src, dst);
2856 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2858 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2860 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2863 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2864 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2865 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2866 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2870 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2872 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2874 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2876 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2878 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2882 static_always_inline uword
2883 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2884 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2886 u32 n_left = frame->n_vectors, *from;
2887 ikev2_main_t *km = &ikev2_main;
2888 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2889 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2890 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2891 ikev2_stats_t _stats, *stats = &_stats;
2894 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2895 from = vlib_frame_vector_args (frame);
2896 vlib_get_buffers (vm, from, bufs, n_left);
2901 vlib_buffer_t *b0 = b[0];
2902 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2903 : IKEV2_NEXT_IP6_ERROR_DROP;
2904 ip4_header_t *ip40 = 0;
2905 ip6_header_t *ip60 = 0;
2908 ikev2_sa_t *sa0 = 0;
2909 ikev2_sa_t sa; /* temporary store for SA */
2916 u8 *ptr = vlib_buffer_get_current (b0);
2917 ip40 = (ip4_header_t *) ptr;
2918 ptr += sizeof (*ip40);
2919 udp0 = (udp_header_t *) ptr;
2920 ptr += sizeof (*udp0);
2921 ike0 = (ike_header_t *) ptr;
2922 ip_hdr_sz = sizeof (*ip40);
2926 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2927 ike0 = vlib_buffer_get_current (b0);
2928 vlib_buffer_advance (b0, -sizeof (*udp0));
2929 udp0 = vlib_buffer_get_current (b0);
2933 ip40 = (ip4_header_t *) ipx_hdr;
2934 ip_hdr_sz = sizeof (*ip40);
2938 ip60 = (ip6_header_t *) ipx_hdr;
2939 ip_hdr_sz = sizeof (*ip60);
2941 vlib_buffer_advance (b0, -ip_hdr_sz);
2944 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2946 /* check for non-esp marker */
2949 ASSERT (*((u32 *) ike0) == 0);
2951 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2952 rlen -= sizeof (ikev2_non_esp_marker);
2955 if (clib_net_to_host_u32 (ike0->length) != rlen)
2957 vlib_node_increment_counter (vm, node->node_index,
2958 IKEV2_ERROR_BAD_LENGTH, 1);
2962 if (ike0->version != IKE_VERSION_2)
2964 vlib_node_increment_counter (vm, node->node_index,
2965 IKEV2_ERROR_NOT_IKEV2, 1);
2969 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2972 clib_memset (sa0, 0, sizeof (*sa0));
2974 if (ike_hdr_is_initiator (ike0))
2976 sa0->stats.n_sa_init_req++;
2977 stats->n_sa_init_req++;
2978 if (ike0->rspi == 0)
2981 ikev2_set_ip_address (sa0, &ip40->src_address,
2982 &ip40->dst_address, AF_IP4);
2984 ikev2_set_ip_address (sa0, &ip60->src_address,
2985 &ip60->dst_address, AF_IP6);
2987 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2990 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2994 vlib_node_increment_counter (vm, node->node_index,
2997 IKEV2_ERROR_IKE_SA_INIT_IGNORE
2999 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3004 res = ikev2_process_sa_init_req (
3005 vm, sa0, ike0, udp0, rlen,
3006 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3008 vlib_node_increment_counter (vm, node->node_index,
3009 IKEV2_ERROR_MALFORMED_PACKET,
3012 if (sa0->state == IKEV2_STATE_SA_INIT)
3014 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3016 ikev2_select_proposal (sa0->i_proposals,
3017 IKEV2_PROTOCOL_IKE);
3018 ikev2_generate_sa_init_data_and_log (sa0);
3021 if (sa0->state == IKEV2_STATE_SA_INIT
3022 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3024 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3026 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3028 vlib_node_increment_counter (vm, node->node_index,
3029 IKEV2_ERROR_NO_BUFF_SPACE,
3033 if (sa0->state == IKEV2_STATE_SA_INIT)
3035 /* add SA to the pool */
3036 pool_get (ptd->sas, sa0);
3037 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3038 ikev2_init_sa (vm, sa0);
3039 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3043 ikev2_sa_free_all_vec (sa0);
3047 else //received sa_init without initiator flag
3050 ikev2_set_ip_address (sa0, &ip40->dst_address,
3051 &ip40->src_address, AF_IP4);
3053 ikev2_set_ip_address (sa0, &ip60->dst_address,
3054 &ip60->src_address, AF_IP6);
3056 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3058 if (sa0->state == IKEV2_STATE_SA_INIT)
3061 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3062 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3065 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3067 if (clib_atomic_bool_cmp_and_swap
3068 (&sai->init_response_received, 0, 1))
3070 ikev2_complete_sa_data (sa0, sai);
3071 ikev2_calc_keys (sa0);
3072 ikev2_sa_auth_init (sa0);
3073 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3075 clib_net_to_host_u32 (sai->last_init_msg_id);
3076 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3077 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3080 vlib_node_increment_counter (vm,
3082 IKEV2_ERROR_NO_BUFF_SPACE,
3087 /* we've already processed sa-init response */
3088 sa0->state = IKEV2_STATE_UNKNOWN;
3093 if (sa0->state == IKEV2_STATE_SA_INIT)
3095 /* add SA to the pool */
3096 pool_get (ptd->sas, sa0);
3097 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3098 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3102 ikev2_sa_free_all_vec (sa0);
3106 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3109 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3112 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3113 slen = ikev2_retransmit_resp (sa0, ike0);
3116 vlib_node_increment_counter (vm, node->node_index,
3119 IKEV2_ERROR_IKE_REQ_IGNORE
3121 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3126 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3127 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3129 ikev2_sa_auth (sa0);
3131 vlib_node_increment_counter (vm, node->node_index,
3132 IKEV2_ERROR_MALFORMED_PACKET, 1);
3133 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3135 ikev2_initial_contact_cleanup (ptd, sa0);
3136 ikev2_sa_match_ts (sa0);
3137 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3138 ikev2_create_tunnel_interface (vm, sa0,
3143 if (sa0->is_initiator)
3145 ikev2_del_sa_init (sa0->ispi);
3149 sa0->stats.n_sa_auth_req++;
3150 stats->n_sa_auth_req++;
3151 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3152 sa0->last_init_msg_id = 1;
3154 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3156 vlib_node_increment_counter (vm, node->node_index,
3157 IKEV2_ERROR_NO_BUFF_SPACE,
3162 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3165 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3168 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3169 slen = ikev2_retransmit_resp (sa0, ike0);
3172 vlib_node_increment_counter (vm, node->node_index,
3175 IKEV2_ERROR_IKE_REQ_IGNORE
3177 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3182 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3185 vlib_node_increment_counter (vm, node->node_index,
3186 IKEV2_ERROR_MALFORMED_PACKET,
3194 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3196 ikev2_delete_t *d, *tmp, *resp = 0;
3197 vec_foreach (d, sa0->del)
3199 ikev2_child_sa_t *ch_sa;
3200 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3202 !sa0->is_initiator);
3205 ikev2_delete_tunnel_interface (km->vnet_main,
3207 if (!sa0->is_initiator)
3209 vec_add2 (resp, tmp, 1);
3210 tmp->protocol_id = d->protocol_id;
3211 tmp->spi = ch_sa->r_proposals[0].spi;
3213 ikev2_sa_del_child_sa (sa0, ch_sa);
3216 if (!sa0->is_initiator)
3218 vec_free (sa0->del);
3223 if (ike_hdr_is_request (ike0))
3225 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3227 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3229 vlib_node_increment_counter (vm, node->node_index,
3230 IKEV2_ERROR_NO_BUFF_SPACE,
3235 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3238 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3241 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3242 slen = ikev2_retransmit_resp (sa0, ike0);
3245 vlib_node_increment_counter (vm, node->node_index,
3248 IKEV2_ERROR_IKE_REQ_IGNORE
3250 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3255 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3258 vlib_node_increment_counter (vm, node->node_index,
3259 IKEV2_ERROR_MALFORMED_PACKET,
3267 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3270 ikev2_sa_free_all_child_sa (&sa0->childs);
3271 ikev2_child_sa_t *child;
3272 vec_add2 (sa0->childs, child, 1);
3273 clib_memset (child, 0, sizeof (*child));
3274 child->r_proposals = sa0->rekey[0].r_proposal;
3275 child->i_proposals = sa0->rekey[0].i_proposal;
3276 child->tsi = sa0->rekey[0].tsi;
3277 child->tsr = sa0->rekey[0].tsr;
3278 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3279 child - sa0->childs, 1);
3281 if (ike_hdr_is_response (ike0))
3283 vec_free (sa0->rekey);
3287 stats->n_rekey_req++;
3288 sa0->stats.n_rekey_req++;
3289 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3291 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3293 vlib_node_increment_counter (vm, node->node_index,
3294 IKEV2_ERROR_NO_BUFF_SPACE,
3298 else if (sa0->new_child)
3300 ikev2_child_sa_t *c;
3301 vec_add2 (sa0->childs, c, 1);
3302 memset (c, 0, sizeof (*c));
3303 c->r_proposals = sa0->new_child[0].r_proposal;
3304 c->i_proposals = sa0->new_child[0].i_proposal;
3305 c->tsi = sa0->new_child[0].tsi;
3306 c->tsr = sa0->new_child[0].tsr;
3307 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3308 c - sa0->childs, 0);
3309 if (ike_hdr_is_request (ike0))
3311 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3313 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3315 vlib_node_increment_counter (
3316 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3323 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3327 /* if we are sending packet back, rewrite headers */
3328 if (slen && ~0 != slen)
3332 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3333 ikev2_rewrite_v4_addrs (sa0, ip40);
3337 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3338 ikev2_rewrite_v6_addrs (sa0, ip60);
3343 udp0->dst_port = udp0->src_port =
3344 clib_net_to_host_u16 (ikev2_get_port (sa0));
3346 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3347 && ikev2_natt_active (sa0))
3350 slen = ikev2_insert_non_esp_marker (ike0, slen);
3356 slen += sizeof (ikev2_non_esp_marker);
3358 u16 tp = udp0->dst_port;
3359 udp0->dst_port = udp0->src_port;
3360 udp0->src_port = tp;
3363 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3365 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3368 ip40->length = clib_host_to_net_u16 (b0->current_length);
3369 ip40->checksum = ip4_header_checksum (ip40);
3373 ip60->payload_length =
3374 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3378 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3379 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3381 ikev2_child_sa_t *c;
3383 vec_foreach (c, sa0->childs)
3384 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3386 ikev2_delete_sa (ptd, sa0);
3388 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3389 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3392 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3393 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3394 t->next_index = next[0];
3401 ikev2_update_stats (vm, node->node_index, stats);
3402 vlib_node_increment_counter (vm, node->node_index,
3403 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3404 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3405 return frame->n_vectors;
3409 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3411 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3415 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3416 vlib_frame_t *frame)
3418 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3422 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3424 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3428 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3429 .function = ikev2_ip4,
3430 .name = "ikev2-ip4",
3431 .vector_size = sizeof (u32),
3432 .format_trace = format_ikev2_trace,
3433 .type = VLIB_NODE_TYPE_INTERNAL,
3435 .n_errors = IKEV2_N_ERROR,
3436 .error_counters = ikev2_error_counters,
3438 .n_next_nodes = IKEV2_IP4_N_NEXT,
3440 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3441 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3445 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3446 .function = ikev2_ip4_natt,
3447 .name = "ikev2-ip4-natt",
3448 .vector_size = sizeof (u32),
3449 .format_trace = format_ikev2_trace,
3450 .type = VLIB_NODE_TYPE_INTERNAL,
3452 .n_errors = IKEV2_N_ERROR,
3453 .error_counters = ikev2_error_counters,
3455 .n_next_nodes = IKEV2_IP4_N_NEXT,
3457 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3458 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3462 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3463 .function = ikev2_ip6,
3464 .name = "ikev2-ip6",
3465 .vector_size = sizeof (u32),
3466 .format_trace = format_ikev2_trace,
3467 .type = VLIB_NODE_TYPE_INTERNAL,
3469 .n_errors = IKEV2_N_ERROR,
3470 .error_counters = ikev2_error_counters,
3472 .n_next_nodes = IKEV2_IP6_N_NEXT,
3474 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3475 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3480 // set ikev2 proposals when vpp is used as initiator
3481 static clib_error_t *
3482 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3483 ikev2_transforms_set * ts,
3484 ikev2_sa_proposal_t ** proposals, int is_ike)
3487 ikev2_main_t *km = &ikev2_main;
3488 ikev2_sa_proposal_t *proposal;
3489 vec_add2 (*proposals, proposal, 1);
3490 ikev2_sa_transform_t *td;
3495 vec_foreach (td, km->supported_transforms)
3497 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3498 && td->encr_type == ts->crypto_alg
3499 && td->key_len == ts->crypto_key_size / 8)
3502 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3503 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3504 vec_add (td->attrs, (u8 *) attr, 4);
3505 vec_add1 (proposal->transforms, *td);
3514 r = clib_error_return (0, "Unsupported algorithm");
3518 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3522 vec_foreach (td, km->supported_transforms)
3524 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3525 && td->integ_type == ts->integ_alg)
3527 vec_add1 (proposal->transforms, *td);
3535 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3536 r = clib_error_return (0, "Unsupported algorithm");
3545 vec_foreach (td, km->supported_transforms)
3547 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3548 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3550 vec_add1 (proposal->transforms, *td);
3557 r = clib_error_return (0, "Unsupported algorithm");
3566 vec_foreach (td, km->supported_transforms)
3568 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3570 vec_add1 (proposal->transforms, *td);
3573 sa->dh_group = td->dh_type;
3581 r = clib_error_return (0, "Unsupported algorithm");
3589 vec_foreach (td, km->supported_transforms)
3591 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3593 vec_add1 (proposal->transforms, *td);
3599 r = clib_error_return (0, "Unsupported algorithm");
3608 static ikev2_profile_t *
3609 ikev2_profile_index_by_name (u8 * name)
3611 ikev2_main_t *km = &ikev2_main;
3614 p = mhash_get (&km->profile_index_by_name, name);
3618 return pool_elt_at_index (km->profiles, p[0]);
3623 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3624 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3633 b0 = vlib_get_buffer (vm, bi0);
3634 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3635 udp0 = vlib_buffer_get_current (b0);
3636 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3637 udp0->src_port = clib_host_to_net_u16 (src_port);
3638 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3641 if (ip_addr_version (dst) == AF_IP4)
3643 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3644 ip40 = vlib_buffer_get_current (b0);
3645 ip40->ip_version_and_header_length = 0x45;
3647 ip40->fragment_id = 0;
3648 ip40->flags_and_fragment_offset = 0;
3650 ip40->protocol = IP_PROTOCOL_UDP;
3651 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3652 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3653 b0->current_length =
3654 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3655 ip40->length = clib_host_to_net_u16 (b0->current_length);
3656 ip40->checksum = ip4_header_checksum (ip40);
3660 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3661 ip60 = vlib_buffer_get_current (b0);
3663 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3664 ip60->ip_version_traffic_class_and_flow_label =
3665 clib_host_to_net_u32 (0x6 << 28);
3666 ip60->payload_length =
3667 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3668 ip60->protocol = IP_PROTOCOL_UDP;
3669 ip60->hop_limit = 0xff;
3670 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3671 sizeof (ip60->src_address));
3672 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3673 sizeof (ip60->src_address));
3676 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3677 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3678 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3680 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3681 ip4_lookup_node.index : ip6_lookup_node.index;
3683 /* send the request */
3684 f = vlib_get_frame_to_node (vm, next_index);
3685 to_next = vlib_frame_vector_args (f);
3688 vlib_put_frame_to_node (vm, next_index, f);
3693 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3696 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3701 *b = vlib_get_buffer (vm, bi0);
3706 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3708 ikev2_main_t *km = &ikev2_main;
3711 EVP_PKEY_free (km->pkey);
3712 km->pkey = ikev2_load_key_file (file);
3713 if (km->pkey == NULL)
3714 return clib_error_return (0, "load key '%s' failed", file);
3719 static_always_inline vnet_api_error_t
3720 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3722 ikev2_main_t *km = &ikev2_main;
3723 udp_dst_port_info_t *pi;
3725 uword *v = hash_get (km->udp_ports, port);
3726 pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
3730 /* IKE already uses this port, only increment reference counter */
3737 return VNET_API_ERROR_UDP_PORT_TAKEN;
3739 udp_register_dst_port (km->vlib_main, port,
3740 ipsec4_tun_input_node.index, 1);
3741 hash_set (km->udp_ports, port, 1);
3743 p->ipsec_over_udp_port = port;
3747 static_always_inline void
3748 ikev2_unregister_udp_port (ikev2_profile_t * p)
3750 ikev2_main_t *km = &ikev2_main;
3753 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3756 v = hash_get (km->udp_ports, p->ipsec_over_udp_port);
3764 udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1);
3765 hash_unset (km->udp_ports, p->ipsec_over_udp_port);
3768 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3772 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3773 ikev2_main_per_thread_data_t * tkm,
3774 ikev2_sa_t * sa, u8 send_notification)
3776 ikev2_main_t *km = &ikev2_main;
3777 ip_address_t *src, *dst;
3779 ikev2_child_sa_t *c;
3781 /* Create the Initiator notification for IKE SA removal */
3786 vec_resize (sa->del, 1);
3787 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3788 sa->del->spi = sa->ispi;
3790 if (send_notification)
3792 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3795 ikev2_log_error ("buffer alloc failure");
3799 ike0 = vlib_buffer_get_current (b0);
3800 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3801 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3802 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3804 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3805 sa->last_init_msg_id += 1;
3806 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3810 if (ikev2_natt_active (sa))
3811 len = ikev2_insert_non_esp_marker (ike0, len);
3813 if (sa->is_initiator)
3824 ikev2_send_ike (vm, src, dst, bi0, len,
3825 ikev2_get_port (sa), sa->dst_port, 0);
3829 /* delete local SA */
3830 vec_foreach (c, sa->childs)
3831 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3833 u64 rspi = sa->rspi;
3834 ikev2_sa_free_all_vec (sa);
3835 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3838 hash_unset (tkm->sa_by_rspi, rspi);
3839 pool_put (tkm->sas, sa);
3844 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3846 ikev2_main_per_thread_data_t *tkm;
3848 u32 pi = p - km->profiles;
3853 pool_foreach (sa, km->sais) {
3854 if (pi == sa->profile_index)
3855 vec_add1 (del_sai, sa - km->sais);
3859 vec_foreach (sai, del_sai)
3861 sa = pool_elt_at_index (km->sais, sai[0]);
3862 ikev2_sa_free_all_vec (sa);
3863 hash_unset (km->sa_by_ispi, sa->ispi);
3864 pool_put (km->sais, sa);
3866 vec_reset_length (del_sai);
3868 vec_foreach (tkm, km->per_thread_data)
3871 pool_foreach (sa, tkm->sas) {
3872 if (sa->profile_index != ~0 && pi == sa->profile_index)
3873 vec_add1 (del_sai, sa - tkm->sas);
3877 vec_foreach (sai, del_sai)
3879 sa = pool_elt_at_index (tkm->sas, sai[0]);
3880 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3883 vec_reset_length (del_sai);
3890 ikev2_profile_free (ikev2_profile_t * p)
3894 vec_free (p->auth.data);
3896 EVP_PKEY_free (p->auth.key);
3898 vec_free (p->loc_id.data);
3899 vec_free (p->rem_id.data);
3903 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3905 ikev2_main_t *km = &ikev2_main;
3910 if (ikev2_profile_index_by_name (name))
3911 return clib_error_return (0, "policy %v already exists", name);
3913 pool_get (km->profiles, p);
3914 clib_memset (p, 0, sizeof (*p));
3915 p->name = vec_dup (name);
3916 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3917 p->responder.sw_if_index = ~0;
3919 uword index = p - km->profiles;
3920 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3924 p = ikev2_profile_index_by_name (name);
3926 return clib_error_return (0, "policy %v does not exists", name);
3928 ikev2_unregister_udp_port (p);
3929 ikev2_cleanup_profile_sessions (km, p);
3931 ikev2_profile_free (p);
3932 pool_put (km->profiles, p);
3933 mhash_unset (&km->profile_index_by_name, name, 0);
3939 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3940 u8 * auth_data, u8 data_hex_format)
3945 p = ikev2_profile_index_by_name (name);
3949 r = clib_error_return (0, "unknown profile %v", name);
3954 EVP_PKEY_free (p->auth.key);
3955 vec_free (p->auth.data);
3957 p->auth.method = auth_method;
3958 p->auth.data = vec_dup (auth_data);
3959 p->auth.hex = data_hex_format;
3961 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3963 vec_add1 (p->auth.data, 0);
3964 p->auth.key = ikev2_load_cert_file (p->auth.data);
3965 if (p->auth.key == NULL)
3966 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3973 ikev2_is_id_supported (u8 id_type)
3975 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3976 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3977 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3978 id_type == IKEV2_ID_TYPE_ID_FQDN);
3982 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3988 if (!ikev2_is_id_supported (id_type))
3990 r = clib_error_return (0, "unsupported identity type %U",
3991 format_ikev2_id_type, id_type);
3995 p = ikev2_profile_index_by_name (name);
3999 r = clib_error_return (0, "unknown profile %v", name);
4005 vec_free (p->loc_id.data);
4006 p->loc_id.type = id_type;
4007 p->loc_id.data = vec_dup (data);
4011 vec_free (p->rem_id.data);
4012 p->rem_id.type = id_type;
4013 p->rem_id.data = vec_dup (data);
4019 static_always_inline void
4020 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
4022 if (ip_addr_version (addr) == AF_IP4)
4023 ts->ts_type = TS_IPV4_ADDR_RANGE;
4025 ts->ts_type = TS_IPV6_ADDR_RANGE;
4028 static_always_inline void
4029 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
4030 const ip_address_t * end)
4032 ip_address_copy (&ts->start_addr, start);
4033 ip_address_copy (&ts->end_addr, end);
4037 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4038 u16 start_port, u16 end_port, ip_address_t start_addr,
4039 ip_address_t end_addr, int is_local)
4044 p = ikev2_profile_index_by_name (name);
4048 r = clib_error_return (0, "unknown profile %v", name);
4052 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4053 return clib_error_return (0, "IP address version mismatch!");
4057 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4058 p->loc_ts.start_port = start_port;
4059 p->loc_ts.end_port = end_port;
4060 p->loc_ts.protocol_id = protocol_id;
4061 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4065 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4066 p->rem_ts.start_port = start_port;
4067 p->rem_ts.end_port = end_port;
4068 p->rem_ts.protocol_id = protocol_id;
4069 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4077 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4078 u32 sw_if_index, ip_address_t addr)
4083 p = ikev2_profile_index_by_name (name);
4087 r = clib_error_return (0, "unknown profile %v", name);
4091 p->responder.sw_if_index = sw_if_index;
4092 ip_address_copy (&p->responder.addr, &addr);
4098 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4099 ikev2_transform_encr_type_t crypto_alg,
4100 ikev2_transform_integ_type_t integ_alg,
4101 ikev2_transform_dh_type_t dh_type,
4102 u32 crypto_key_size)
4107 p = ikev2_profile_index_by_name (name);
4111 r = clib_error_return (0, "unknown profile %v", name);
4115 p->ike_ts.crypto_alg = crypto_alg;
4116 p->ike_ts.integ_alg = integ_alg;
4117 p->ike_ts.dh_type = dh_type;
4118 p->ike_ts.crypto_key_size = crypto_key_size;
4123 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4124 ikev2_transform_encr_type_t crypto_alg,
4125 ikev2_transform_integ_type_t integ_alg,
4126 u32 crypto_key_size)
4131 p = ikev2_profile_index_by_name (name);
4135 r = clib_error_return (0, "unknown profile %v", name);
4139 p->esp_ts.crypto_alg = crypto_alg;
4140 p->esp_ts.integ_alg = integ_alg;
4141 p->esp_ts.crypto_key_size = crypto_key_size;
4146 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4147 u8 * name, u32 sw_if_index)
4152 p = ikev2_profile_index_by_name (name);
4156 r = clib_error_return (0, "unknown profile %v", name);
4160 p->tun_itf = sw_if_index;
4166 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4169 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4170 ikev2_main_t *km = &ikev2_main;
4171 vnet_api_error_t rv = 0;
4175 return VNET_API_ERROR_INVALID_VALUE;
4179 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4180 return VNET_API_ERROR_VALUE_EXIST;
4182 rv = ikev2_register_udp_port (p, port);
4186 v = hash_get (km->udp_ports, port);
4188 return VNET_API_ERROR_IKE_NO_PORT;
4190 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4191 return VNET_API_ERROR_INVALID_VALUE;
4193 ikev2_unregister_udp_port (p);
4199 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4201 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4206 r = clib_error_return (0, "unknown profile %v", name);
4215 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4216 u64 lifetime, u32 jitter, u32 handover,
4222 p = ikev2_profile_index_by_name (name);
4226 r = clib_error_return (0, "unknown profile %v", name);
4230 p->lifetime = lifetime;
4231 p->lifetime_jitter = jitter;
4232 p->handover = handover;
4233 p->lifetime_maxdata = maxdata;
4238 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4239 ip_address_t * out_addr)
4241 ip4_address_t *if_ip4;
4242 ip6_address_t *if_ip6;
4246 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4249 ip_address_set (out_addr, if_ip4, AF_IP4);
4255 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4258 ip_address_set (out_addr, if_ip6, AF_IP6);
4266 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4270 ikev2_main_t *km = &ikev2_main;
4274 int len = sizeof (ike_header_t), valid_ip = 0;
4275 ip_address_t if_ip = ip_address_initializer;
4277 p = ikev2_profile_index_by_name (name);
4281 r = clib_error_return (0, "unknown profile %v", name);
4285 if (p->responder.sw_if_index == ~0
4286 || ip_address_is_zero (&p->responder.addr))
4288 r = clib_error_return (0, "responder not set for profile %v", name);
4292 if (ikev2_get_if_address (p->responder.sw_if_index,
4293 ip_addr_version (&p->responder.addr), &if_ip))
4298 /* Prepare the SA and the IKE payload */
4300 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4301 ikev2_payload_chain_t *chain = 0;
4302 ikev2_payload_new_chain (chain);
4304 /* Build the IKE proposal payload */
4305 ikev2_sa_proposal_t *proposals = 0;
4306 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4307 proposals[0].proposal_num = 1;
4308 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4310 /* Add and then cleanup proposal data */
4311 ikev2_payload_add_sa (chain, proposals);
4312 ikev2_sa_free_proposal_vector (&proposals);
4314 sa.is_initiator = 1;
4315 sa.profile_index = p - km->profiles;
4316 sa.state = IKEV2_STATE_SA_INIT;
4317 sa.tun_itf = p->tun_itf;
4318 sa.udp_encap = p->udp_encap;
4319 if (p->natt_disabled)
4320 sa.natt_state = IKEV2_NATT_DISABLED;
4321 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4322 sa.is_tun_itf_set = 1;
4323 sa.initial_contact = 1;
4324 sa.dst_port = IKEV2_PORT;
4326 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4327 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4329 ikev2_sa_free_all_vec (&sa);
4330 ikev2_payload_destroy_chain (chain);
4331 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4334 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4335 ikev2_payload_add_nonce (chain, sa.i_nonce);
4337 /* Build the child SA proposal */
4338 vec_resize (sa.childs, 1);
4339 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4340 &sa.childs[0].i_proposals, 0);
4341 sa.childs[0].i_proposals[0].proposal_num = 1;
4342 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4343 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4344 sizeof (sa.childs[0].i_proposals[0].spi));
4346 /* Add NAT detection notification messages (mandatory) */
4347 u8 *nat_detection_sha1 =
4348 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4349 clib_host_to_net_u64 (sa.rspi),
4350 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4352 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4353 nat_detection_sha1);
4354 vec_free (nat_detection_sha1);
4355 nat_detection_sha1 =
4356 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4357 clib_host_to_net_u64 (sa.rspi),
4359 clib_host_to_net_u16 (sa.dst_port));
4360 ikev2_payload_add_notify (chain,
4361 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4362 nat_detection_sha1);
4363 vec_free (nat_detection_sha1);
4365 u8 *sig_hash_algo = vec_new (u8, 8);
4366 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4367 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4368 ikev2_payload_add_notify (chain,
4369 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4371 vec_free (sig_hash_algo);
4373 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4376 ikev2_sa_free_all_vec (&sa);
4377 ikev2_payload_destroy_chain (chain);
4378 char *errmsg = "buffer alloc failure";
4379 ikev2_log_error (errmsg);
4380 return clib_error_return (0, errmsg);
4382 ike0 = vlib_buffer_get_current (b0);
4384 /* Buffer update and boilerplate */
4385 len += vec_len (chain->data);
4386 ike0->nextpayload = chain->first_payload_type;
4387 ike0->length = clib_host_to_net_u32 (len);
4388 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4389 ikev2_payload_destroy_chain (chain);
4391 ike0->version = IKE_VERSION_2;
4392 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4393 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4394 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4397 sa.last_init_msg_id += 1;
4399 /* store whole IKE payload - needed for PSK auth */
4400 vec_reset_length (sa.last_sa_init_req_packet_data);
4401 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4403 /* add data to the SA then add it to the pool */
4404 ip_address_copy (&sa.iaddr, &if_ip);
4405 ip_address_copy (&sa.raddr, &p->responder.addr);
4406 sa.i_id.type = p->loc_id.type;
4407 sa.i_id.data = vec_dup (p->loc_id.data);
4408 sa.r_id.type = p->rem_id.type;
4409 sa.r_id.data = vec_dup (p->rem_id.data);
4410 sa.i_auth.method = p->auth.method;
4411 sa.i_auth.hex = p->auth.hex;
4412 sa.i_auth.data = vec_dup (p->auth.data);
4413 sa.sw_if_index = p->responder.sw_if_index;
4414 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4415 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4417 ikev2_initial_contact_cleanup (0, &sa);
4419 /* add SA to the pool */
4420 ikev2_sa_t *sa0 = 0;
4421 pool_get (km->sais, sa0);
4422 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4423 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4427 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4428 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4431 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4432 clib_host_to_net_u64 (sa0->ispi), 0,
4433 ip_addr_v4 (&p->responder.addr).as_u32,
4434 ip_addr_version (&p->responder.addr) == AF_IP4);
4439 clib_error_return (0, "interface %U does not have any IP address!",
4440 format_vnet_sw_if_index_name, vnet_get_main (),
4441 p->responder.sw_if_index);
4449 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4450 ikev2_child_sa_t * csa)
4452 /* Create the Initiator notification for child SA removal */
4453 ikev2_main_t *km = &ikev2_main;
4459 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4462 ikev2_log_error ("buffer alloc failure");
4466 ike0 = vlib_buffer_get_current (b0);
4467 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4468 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4469 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4471 vec_resize (sa->del, 1);
4472 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4473 sa->del->spi = csa->i_proposals->spi;
4474 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4475 sa->last_init_msg_id += 1;
4476 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4480 if (ikev2_natt_active (sa))
4481 len = ikev2_insert_non_esp_marker (ike0, len);
4482 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4483 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4485 /* delete local child SA */
4486 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4487 ikev2_sa_del_child_sa (sa, csa);
4491 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4494 ikev2_main_t *km = &ikev2_main;
4495 ikev2_main_per_thread_data_t *tkm;
4496 ikev2_sa_t *fsa = 0;
4497 ikev2_child_sa_t *fchild = 0;
4499 /* Search for the child SA */
4500 vec_foreach (tkm, km->per_thread_data)
4506 pool_foreach (sa, tkm->sas) {
4507 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4517 if (!fchild || !fsa)
4519 r = clib_error_return (0, "Child SA not found");
4524 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4531 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4534 ikev2_main_t *km = &ikev2_main;
4535 ikev2_main_per_thread_data_t *tkm;
4536 ikev2_sa_t *fsa = 0;
4537 ikev2_main_per_thread_data_t *ftkm = 0;
4539 /* Search for the IKE SA */
4540 vec_foreach (tkm, km->per_thread_data)
4546 pool_foreach (sa, tkm->sas) {
4547 if (sa->ispi == ispi)
4559 r = clib_error_return (0, "IKE SA not found");
4563 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4568 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4569 ikev2_child_sa_t * csa)
4571 /* Create the Initiator request for create child SA */
4577 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4580 ikev2_log_error ("buffer alloc failure");
4584 ike0 = vlib_buffer_get_current (b0);
4585 ike0->version = IKE_VERSION_2;
4586 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4587 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4588 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4589 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4590 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4591 sa->last_init_msg_id += 1;
4593 ikev2_rekey_t *rekey;
4594 vec_reset_length (sa->rekey);
4595 vec_add2 (sa->rekey, rekey, 1);
4596 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4599 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4600 rekey->spi = proposals[0].spi;
4601 rekey->ispi = csa->i_proposals->spi;
4602 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4606 if (ikev2_natt_active (sa))
4607 len = ikev2_insert_non_esp_marker (ike0, len);
4608 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4609 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4610 vec_free (proposals);
4614 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4617 ikev2_main_t *km = &ikev2_main;
4618 ikev2_main_per_thread_data_t *tkm;
4619 ikev2_sa_t *fsa = 0;
4620 ikev2_child_sa_t *fchild = 0;
4622 /* Search for the child SA */
4623 vec_foreach (tkm, km->per_thread_data)
4629 pool_foreach (sa, tkm->sas) {
4630 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4640 if (!fchild || !fsa)
4642 r = clib_error_return (0, "Child SA not found");
4647 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4654 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4656 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4660 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4662 u64 *ispi, *ispi_vec = 0;
4663 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4664 ikev2_main_t *km = &ikev2_main;
4665 ikev2_main_per_thread_data_t *tkm;
4666 p->responder.sw_if_index = ~0;
4668 vec_foreach (tkm, km->per_thread_data)
4671 pool_foreach (sa, tkm->sas) {
4672 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4673 vec_add1 (sa_vec, sa);
4677 vec_foreach (sap, sa_vec)
4679 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4681 vec_reset_length (sa_vec);
4686 pool_foreach (sa, km->sais) {
4687 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4688 vec_add1 (ispi_vec, sa->ispi);
4692 vec_foreach (ispi, ispi_vec)
4694 ikev2_del_sa_init_from_main (ispi);
4697 vec_free (ispi_vec);
4700 static clib_error_t *
4701 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4703 ikev2_main_t *km = &ikev2_main;
4710 pool_foreach (p, km->profiles) {
4711 if (p->responder.sw_if_index == sw_if_index)
4712 ikev2_sa_del (p, sw_if_index);
4719 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4722 ikev2_init (vlib_main_t * vm)
4724 ikev2_main_t *km = &ikev2_main;
4725 vlib_thread_main_t *tm = vlib_get_thread_main ();
4728 clib_memset (km, 0, sizeof (ikev2_main_t));
4729 km->vnet_main = vnet_get_main ();
4732 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4733 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4734 ikev2_crypto_init (km);
4736 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4738 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4739 CLIB_CACHE_LINE_BYTES);
4740 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4742 ikev2_main_per_thread_data_t *ptd =
4743 vec_elt_at_index (km->per_thread_data, thread_id);
4745 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4747 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4748 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4749 ptd->hmac_ctx = HMAC_CTX_new ();
4751 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4752 ptd->evp_ctx = &ptd->_evp_ctx;
4753 HMAC_CTX_init (&(ptd->_hmac_ctx));
4754 ptd->hmac_ctx = &ptd->_hmac_ctx;
4758 km->sa_by_ispi = hash_create (0, sizeof (uword));
4759 km->sw_if_indices = hash_create (0, 0);
4760 km->udp_ports = hash_create (0, sizeof (uword));
4762 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4763 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4764 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4765 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4767 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt");
4768 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4770 ikev2_cli_reference ();
4772 km->log_level = IKEV2_LOG_ERROR;
4773 km->log_class = vlib_log_register_class ("ikev2", 0);
4778 VLIB_INIT_FUNCTION (ikev2_init) =
4780 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4785 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4788 ikev2_main_t *km = &ikev2_main;
4789 ikev2_profile_t *p = 0;
4790 vlib_main_t *vm = km->vlib_main;
4791 f64 now = vlib_time_now (vm);
4794 if (sa->profile_index != ~0)
4795 p = pool_elt_at_index (km->profiles, sa->profile_index);
4797 if (sa->is_initiator && p && csa->time_to_expiration
4798 && now > csa->time_to_expiration)
4800 if (!csa->is_expired || csa->rekey_retries > 0)
4802 ikev2_rekey_child_sa_internal (vm, sa, csa);
4803 csa->time_to_expiration = now + p->handover;
4804 csa->is_expired = 1;
4805 if (csa->rekey_retries == 0)
4807 csa->rekey_retries = 5;
4809 else if (csa->rekey_retries > 0)
4811 csa->rekey_retries--;
4812 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4813 csa->i_proposals->spi, csa->rekey_retries);
4814 if (csa->rekey_retries == 0)
4816 csa->rekey_retries = -1;
4823 csa->time_to_expiration = 0;
4824 ikev2_delete_child_sa_internal (vm, sa, csa);
4832 ipip_tunnel_t *ipip = NULL;
4833 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4834 if (~0 == sw_if_index)
4836 ip46_address_t local_ip;
4837 ip46_address_t remote_ip;
4838 if (sa->is_initiator)
4840 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4841 ip_addr_bytes (&sa->iaddr));
4842 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4843 ip_addr_bytes (&sa->raddr));
4847 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4848 ip_addr_bytes (&sa->raddr));
4849 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4850 ip_addr_bytes (&sa->iaddr));
4854 ipip_tunnel_key_t key = {
4857 .transport = IPIP_TRANSPORT_IP4,
4862 ipip = ipip_tunnel_db_find (&key);
4865 sw_if_index = ipip->sw_if_index;
4871 vec_add1 (sas_in, csa->remote_sa_id);
4872 vlib_worker_thread_barrier_sync (vm);
4873 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4874 csa->local_sa_id, sas_in);
4877 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4878 vlib_worker_thread_barrier_release (vm);
4885 ikev2_set_log_level (ikev2_log_level_t log_level)
4887 ikev2_main_t *km = &ikev2_main;
4889 if (log_level >= IKEV2_LOG_MAX)
4891 ikev2_log_error ("unknown logging level %d", log_level);
4895 km->log_level = log_level;
4900 ikev2_set_liveness_params (u32 period, u32 max_retries)
4902 ikev2_main_t *km = &ikev2_main;
4904 if (period == 0 || max_retries == 0)
4905 return clib_error_return (0, "invalid args");
4907 km->liveness_period = period;
4908 km->liveness_max_retries = max_retries;
4913 ikev2_profile_natt_disable (u8 * name)
4915 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4917 return clib_error_return (0, "unknown profile %v", name);
4919 p->natt_disabled = 1;
4924 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4926 ikev2_main_t *km = &ikev2_main;
4927 vlib_main_t *vm = km->vlib_main;
4928 ikev2_main_per_thread_data_t *tkm;
4929 ikev2_sa_t *fsa = 0;
4930 ikev2_profile_t *p = 0;
4931 ikev2_child_sa_t *fchild = 0;
4932 f64 now = vlib_time_now (vm);
4933 vlib_counter_t counts;
4935 /* Search for the SA and child SA */
4936 vec_foreach (tkm, km->per_thread_data)
4942 pool_foreach (sa, tkm->sas) {
4943 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4952 vlib_get_combined_counter (&ipsec_sa_counters,
4953 ipsec_sa->stat_index, &counts);
4955 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4956 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4958 if (fchild && p && p->lifetime_maxdata)
4960 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4962 fchild->time_to_expiration = now;
4968 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4974 if (ip_address_is_zero (&sa->iaddr))
4976 p = pool_elt_at_index (km->profiles, sa->profile_index);
4977 if (!ikev2_get_if_address (p->responder.sw_if_index,
4978 ip_addr_version (&p->responder.addr),
4982 /* update NAT detection payload */
4984 ikev2_find_ike_notify_payload
4985 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4986 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4990 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4991 clib_host_to_net_u64 (sa->rspi),
4993 clib_host_to_net_u16 (IKEV2_PORT));
4994 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4999 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5002 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5003 clib_memcpy_fast (vlib_buffer_get_current (b),
5004 sa->last_sa_init_req_packet_data,
5005 vec_len (sa->last_sa_init_req_packet_data));
5007 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5008 vec_len (sa->last_sa_init_req_packet_data),
5009 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5013 ikev2_process_pending_sa_init (ikev2_main_t * km)
5020 hash_foreach (ispi, sai, km->sa_by_ispi,
5022 sa = pool_elt_at_index (km->sais, sai);
5023 if (sa->init_response_received)
5026 ikev2_process_pending_sa_init_one (km, sa);
5032 ikev2_send_informational_request (ikev2_sa_t * sa)
5034 ikev2_main_t *km = &ikev2_main;
5035 ip_address_t *src, *dst;
5042 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5045 ikev2_log_error ("buffer alloc failure");
5049 ike0 = vlib_buffer_get_current (b0);
5050 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5051 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5052 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5053 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5055 sa->last_init_msg_id += 1;
5056 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5060 if (ikev2_natt_active (sa))
5061 len = ikev2_insert_non_esp_marker (ike0, len);
5063 if (sa->is_initiator)
5074 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5075 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5080 ikev2_disable_dpd (void)
5082 ikev2_main_t *km = &ikev2_main;
5083 km->dpd_disabled = 1;
5086 static_always_inline int
5087 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
5089 ikev2_main_t *km = &ikev2_main;
5090 vlib_main_t *vm = km->vlib_main;
5092 if (!sa->keys_generated)
5095 if (sa->liveness_retries >= km->liveness_max_retries)
5098 f64 now = vlib_time_now (vm);
5100 if (sa->liveness_period_check < now)
5102 sa->liveness_retries++;
5103 sa->liveness_period_check = now + km->liveness_period;
5104 ikev2_send_informational_request (sa);
5110 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5113 ikev2_main_t *km = &ikev2_main;
5114 ipsec_main_t *im = &ipsec_main;
5116 ikev2_child_sa_t *c;
5121 vlib_process_wait_for_event_or_clock (vm, 2);
5122 vlib_process_get_events (vm, NULL);
5124 /* process ike child sas */
5125 ikev2_main_per_thread_data_t *tkm;
5126 vec_foreach (tkm, km->per_thread_data)
5129 u32 *to_be_deleted = 0;
5132 pool_foreach (sa, tkm->sas) {
5133 ikev2_child_sa_t *c;
5136 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5139 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5141 sa->old_remote_id_present = 0;
5145 sa->old_id_expiration -= 1;
5147 vec_foreach (c, sa->childs)
5148 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5150 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5151 vec_add1 (to_be_deleted, sa - tkm->sas);
5155 vec_foreach (sai, to_be_deleted)
5157 sa = pool_elt_at_index (tkm->sas, sai[0]);
5158 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5159 vec_foreach (c, sa->childs)
5161 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5162 ikev2_sa_del_child_sa (sa, c);
5164 ikev2_sa_free_all_vec (sa);
5165 hash_unset (tkm->sa_by_rspi, sa->rspi);
5166 pool_put (tkm->sas, sa);
5170 p = pool_elt_at_index (km->profiles, sa->profile_index);
5173 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5176 ikev2_log_error ("%U", format_clib_error, e);
5177 clib_error_free (e);
5182 vec_free (to_be_deleted);
5185 /* process ipsec sas */
5188 pool_foreach (sa, im->sad) {
5189 ikev2_mngr_process_ipsec_sa(sa);
5193 ikev2_process_pending_sa_init (km);
5199 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5200 .function = ikev2_mngr_process_fn,
5201 .type = VLIB_NODE_TYPE_PROCESS,
5203 "ikev2-manager-process",
5206 VLIB_PLUGIN_REGISTER () = {
5207 .version = VPP_BUILD_VER,
5208 .description = "Internet Key Exchange (IKEv2) Protocol",
5213 * fd.io coding-style-patch-verification: ON
5216 * eval: (c-set-style "gnu")