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);
1624 static ikev2_profile_t *
1625 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1626 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1628 ikev2_profile_t *ret = 0, *p;
1629 ikev2_id_t *id_rem, *id_loc;
1630 ikev2_auth_t *sa_auth;
1631 u8 *authmsg, *psk = 0, *auth = 0;
1633 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1635 if (sa->is_initiator)
1639 sa_auth = &sa->r_auth;
1645 sa_auth = &sa->i_auth;
1648 pool_foreach (p, km->profiles)
1651 if (!ikev2_is_id_equal (&p->rem_id, id_rem) ||
1652 !ikev2_is_id_equal (&p->loc_id, id_loc))
1655 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1657 if (!p->auth.data ||
1658 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1661 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1662 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1664 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1666 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1673 ikev2_elog_uint (IKEV2_LOG_ERROR,
1674 "shared key mismatch! ispi %lx", sa->ispi);
1677 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1679 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1682 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1684 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1690 ikev2_elog_uint (IKEV2_LOG_ERROR,
1691 "cert verification failed! ispi %lx", sa->ispi);
1700 ikev2_sa_auth (ikev2_sa_t *sa)
1702 ikev2_main_t *km = &ikev2_main;
1703 ikev2_profile_t *sel_p = 0;
1704 ikev2_sa_transform_t *tr_prf;
1705 u8 *psk, *authmsg, *key_pad;
1708 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1710 /* only shared key and rsa signature */
1711 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1712 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1714 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1716 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1720 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1721 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1725 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1726 sa->udp_encap = sel_p->udp_encap;
1727 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1729 if (!sa->is_initiator)
1731 vec_free (sa->r_id.data);
1732 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1733 sa->r_id.type = sel_p->loc_id.type;
1734 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1735 sa->i_id.type = sel_p->rem_id.type;
1737 /* generate our auth data */
1738 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1739 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1741 vec_free (sa->r_auth.data);
1742 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1743 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1744 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1747 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1749 vec_free (sa->r_auth.data);
1750 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1751 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1755 /* select transforms for 1st child sa */
1756 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1757 sa->childs[0].r_proposals =
1758 ikev2_select_proposal (sa->childs[0].i_proposals,
1759 IKEV2_PROTOCOL_ESP);
1761 if (~0 != sel_p->tun_itf)
1763 sa->is_tun_itf_set = 1;
1764 sa->tun_itf = sel_p->tun_itf;
1770 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1771 "profile found! ispi %lx", sa->ispi);
1772 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1778 ikev2_sa_auth_init (ikev2_sa_t * sa)
1780 ikev2_main_t *km = &ikev2_main;
1781 u8 *authmsg, *key_pad, *psk = 0;
1782 ikev2_sa_transform_t *tr_prf;
1785 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1787 /* only shared key and rsa signature */
1788 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1789 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1791 ikev2_elog_uint (IKEV2_LOG_ERROR,
1792 "unsupported authentication method %u",
1794 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1798 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1800 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1802 vec_free (sa->i_auth.data);
1803 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1804 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1805 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1806 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1810 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1812 vec_free (sa->i_auth.data);
1813 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1814 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1820 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1822 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1826 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1828 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1838 ipsec_sa_flags_t flags;
1841 ipsec_crypto_alg_t encr_type;
1842 ipsec_integ_alg_t integ_type;
1843 ip_address_t local_ip;
1844 ip_address_t remote_ip;
1845 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1847 u32 old_remote_sa_id;
1848 u16 ipsec_over_udp_port;
1851 } ikev2_add_ipsec_tunnel_args_t;
1854 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1856 ikev2_main_t *km = &ikev2_main;
1860 .t_flags = TUNNEL_FLAG_NONE,
1861 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1863 .t_mode = TUNNEL_MODE_P2P,
1866 .t_src = a->local_ip,
1867 .t_dst = a->remote_ip,
1869 tunnel_t tun_out = {
1870 .t_flags = TUNNEL_FLAG_NONE,
1871 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1873 .t_mode = TUNNEL_MODE_P2P,
1876 .t_src = a->remote_ip,
1877 .t_dst = a->local_ip,
1880 if (~0 == a->sw_if_index)
1882 /* no tunnel associated with the SA/profile - create a new one */
1883 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
1884 &ip_addr_46 (&a->remote_ip), 0,
1885 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
1886 TUNNEL_MODE_P2P, &sw_if_index);
1888 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
1890 if (hash_get (km->sw_if_indices, sw_if_index))
1891 /* interface is managed by IKE; proceed with updating SAs */
1894 hash_set1 (km->sw_if_indices, sw_if_index);
1898 sw_if_index = a->sw_if_index;
1899 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
1904 ikev2_elog_uint (IKEV2_LOG_ERROR,
1905 "installing ipip tunnel failed! local spi: %x",
1911 vec_add1 (sas_in, a->remote_sa_id);
1914 ipsec_tun_protect_del (sw_if_index, NULL);
1916 /* replace local SA immediately */
1917 ipsec_sa_unlock_id (a->local_sa_id);
1919 /* keep the old sa */
1920 vec_add1 (sas_in, a->old_remote_sa_id);
1923 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
1924 a->encr_type, &a->loc_ckey, a->integ_type,
1925 &a->loc_ikey, a->flags, a->salt_local,
1926 a->src_port, a->dst_port, &tun_out, NULL);
1930 rv = ipsec_sa_add_and_lock (
1931 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
1932 &a->rem_ckey, a->integ_type, &a->rem_ikey,
1933 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
1934 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
1938 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
1945 ipsec_sa_unlock_id (a->remote_sa_id);
1947 ipsec_sa_unlock_id (a->local_sa_id);
1953 ikev2_create_tunnel_interface (vlib_main_t * vm,
1955 ikev2_child_sa_t * child, u32 sa_index,
1956 u32 child_index, u8 is_rekey)
1958 u32 thread_index = vlib_get_thread_index ();
1959 ikev2_main_t *km = &ikev2_main;
1960 ipsec_crypto_alg_t encr_type;
1961 ipsec_integ_alg_t integ_type;
1962 ikev2_profile_t *p = 0;
1963 ikev2_sa_transform_t *tr;
1964 ikev2_sa_proposal_t *proposals;
1966 ikev2_add_ipsec_tunnel_args_t a;
1968 clib_memset (&a, 0, sizeof (a));
1970 if (!child->r_proposals)
1972 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1976 if (sa->is_initiator)
1978 ip_address_copy (&a.local_ip, &sa->iaddr);
1979 ip_address_copy (&a.remote_ip, &sa->raddr);
1980 proposals = child->r_proposals;
1981 a.local_spi = child->r_proposals[0].spi;
1982 a.remote_spi = child->i_proposals[0].spi;
1986 ip_address_copy (&a.local_ip, &sa->raddr);
1987 ip_address_copy (&a.remote_ip, &sa->iaddr);
1988 proposals = child->i_proposals;
1989 a.local_spi = child->i_proposals[0].spi;
1990 a.remote_spi = child->r_proposals[0].spi;
1993 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
1996 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
1997 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
1999 if (ikev2_natt_active (sa))
2000 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2001 a.is_rekey = is_rekey;
2003 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2004 if (tr && tr->esn_type)
2005 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2007 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2010 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2012 switch (tr->key_len)
2015 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2018 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2021 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2024 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2029 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2032 switch (tr->key_len)
2035 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2038 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2041 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2044 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2052 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2058 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2061 a.encr_type = encr_type;
2065 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2068 switch (tr->integ_type)
2070 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2071 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2073 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2074 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2076 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2077 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2079 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2080 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2083 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2089 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2095 integ_type = IPSEC_INTEG_ALG_NONE;
2098 a.integ_type = integ_type;
2099 ikev2_calc_child_keys (sa, child);
2101 if (sa->is_initiator)
2103 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2104 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2105 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2106 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2109 a.salt_remote = child->salt_er;
2110 a.salt_local = child->salt_ei;
2112 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2116 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2117 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2118 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2119 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2122 a.salt_remote = child->salt_ei;
2123 a.salt_local = child->salt_er;
2126 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2127 a.src_port = sa->ipsec_over_udp_port;
2130 if (sa->is_initiator && sa->profile_index != ~0)
2131 p = pool_elt_at_index (km->profiles, sa->profile_index);
2133 if (p && p->lifetime)
2135 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2136 if (p->lifetime_jitter)
2138 // This is not much better than rand(3), which Coverity warns
2139 // is unsuitable for security applications; random_u32 is
2140 // however fast. If this perturbance to the expiration time
2141 // needs to use a better RNG then we may need to use something
2142 // like /dev/urandom which has significant overhead.
2143 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2144 rnd = random_u32 (&rnd);
2146 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2150 if (thread_index & 0xffffffc0)
2151 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2153 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2154 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2156 child->local_sa_id =
2158 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2160 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2165 /* create a new remote SA ID to keep the old SA for a bit longer
2166 * so the peer has some time to swap their SAs */
2168 /* use most significat bit of child index part in id */
2170 if (sa->current_remote_id_mask)
2172 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2173 sa->current_remote_id_mask = 0;
2177 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2178 sa->current_remote_id_mask = mask;
2179 remote_sa_id |= mask;
2181 sa->old_id_expiration = 3.0;
2182 sa->old_remote_id_present = 1;
2185 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2187 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2188 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2190 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2191 (u8 *) & a, sizeof (a));
2197 ip46_address_t local_ip;
2198 ip46_address_t remote_ip;
2202 } ikev2_del_ipsec_tunnel_args_t;
2204 static_always_inline u32
2205 ikev2_flip_alternate_sa_bit (u32 id)
2214 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2216 ikev2_main_t *km = &ikev2_main;
2217 ipip_tunnel_t *ipip = NULL;
2220 if (~0 == a->sw_if_index)
2223 ipip_tunnel_key_t key = {
2225 .dst = a->remote_ip,
2226 .transport = IPIP_TRANSPORT_IP4,
2231 ipip = ipip_tunnel_db_find (&key);
2235 sw_if_index = ipip->sw_if_index;
2236 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2243 sw_if_index = a->sw_if_index;
2244 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2247 if (~0 != sw_if_index)
2248 ipsec_tun_protect_del (sw_if_index, NULL);
2250 ipsec_sa_unlock_id (a->remote_sa_id);
2251 ipsec_sa_unlock_id (a->local_sa_id);
2252 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2255 ipip_del_tunnel (ipip->sw_if_index);
2259 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2260 ikev2_child_sa_t * child)
2262 ikev2_del_ipsec_tunnel_args_t a;
2264 clib_memset (&a, 0, sizeof (a));
2266 if (sa->is_initiator)
2268 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2269 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2273 ip_address_to_46 (&sa->raddr, &a.local_ip);
2274 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2277 a.remote_sa_id = child->remote_sa_id;
2278 a.local_sa_id = child->local_sa_id;
2279 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2281 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2287 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2288 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2290 ikev2_main_t *km = &ikev2_main;
2291 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2293 ike_payload_header_t *ph;
2297 ikev2_sa_transform_t *tr_encr, *tr_integ;
2299 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2301 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2303 ikev2_payload_chain_t *chain = 0;
2304 ikev2_payload_new_chain (chain);
2306 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2308 if (sa->r_proposals == 0)
2310 ikev2_payload_add_notify (chain,
2311 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2312 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2314 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2316 u8 *data = vec_new (u8, 2);
2317 ikev2_sa_transform_t *tr_dh;
2319 ikev2_sa_get_td_for_type (sa->r_proposals,
2320 IKEV2_TRANSFORM_TYPE_DH);
2321 ASSERT (tr_dh && tr_dh->dh_type);
2323 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2324 data[1] = (tr_dh->dh_type) & 0xff;
2326 ikev2_payload_add_notify (chain,
2327 IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
2330 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2332 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2334 u8 *data = vec_new (u8, 1);
2336 data[0] = sa->unsupported_cp;
2337 ikev2_payload_add_notify (chain,
2338 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2346 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2347 ikev2_payload_add_sa (chain, sa->r_proposals);
2348 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2349 ikev2_payload_add_nonce (chain, sa->r_nonce);
2351 u8 *nat_detection_sha1 =
2352 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2353 clib_host_to_net_u64 (sa->rspi),
2354 &sa->raddr, udp->dst_port);
2355 ikev2_payload_add_notify (chain,
2356 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2357 nat_detection_sha1);
2358 vec_free (nat_detection_sha1);
2359 nat_detection_sha1 =
2360 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2361 clib_host_to_net_u64 (sa->rspi),
2362 &sa->iaddr, udp->src_port);
2363 ikev2_payload_add_notify (chain,
2364 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2365 nat_detection_sha1);
2366 vec_free (nat_detection_sha1);
2369 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2371 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2373 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2374 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2375 ikev2_payload_add_auth (chain, &sa->r_auth);
2376 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2377 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2378 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2380 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2382 ikev2_payload_add_notify (chain,
2383 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2385 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2387 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2389 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2391 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2392 ikev2_payload_add_auth (chain, &sa->r_auth);
2394 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2396 ikev2_payload_add_notify (chain,
2397 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2398 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2399 ikev2_payload_add_auth (chain, &sa->r_auth);
2400 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2401 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2403 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2405 u8 *data = vec_new (u8, 1);
2407 data[0] = sa->unsupported_cp;
2408 ikev2_payload_add_notify (chain,
2409 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2413 else if (sa->state == IKEV2_STATE_SA_INIT)
2415 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2416 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2417 ikev2_payload_add_auth (chain, &sa->i_auth);
2418 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2419 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2420 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2421 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2426 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2430 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2432 /* if pending delete */
2435 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2437 if (ike_hdr_is_request (ike))
2438 ikev2_payload_add_delete (chain, sa->del);
2440 /* The response to a request that deletes the IKE SA is an empty
2441 INFORMATIONAL response. */
2442 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2444 /* The response to a request that deletes ESP or AH SAs will contain
2445 delete payloads for the paired SAs going in the other direction. */
2448 ikev2_payload_add_delete (chain, sa->del);
2453 /* received N(AUTHENTICATION_FAILED) */
2454 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2456 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2459 /* received unsupported critical payload */
2460 else if (sa->unsupported_cp)
2462 u8 *data = vec_new (u8, 1);
2464 data[0] = sa->unsupported_cp;
2465 ikev2_payload_add_notify (chain,
2466 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2469 sa->unsupported_cp = 0;
2472 /* else send empty response */
2474 if (ike_hdr_is_response (ike))
2476 ASSERT (stats != 0);
2477 stats->n_keepalives++;
2478 sa->stats.n_keepalives++;
2482 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2484 if (sa->is_initiator)
2487 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2488 ikev2_notify_t notify;
2489 u8 *data = vec_new (u8, 4);
2490 clib_memset (¬ify, 0, sizeof (notify));
2491 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2492 notify.spi = sa->childs[0].i_proposals->spi;
2493 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2495 ikev2_payload_add_sa (chain, proposals);
2496 ikev2_payload_add_nonce (chain, sa->i_nonce);
2497 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2498 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2499 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2504 else if (vec_len (sa->rekey) > 0)
2506 ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
2507 ikev2_payload_add_nonce (chain, sa->r_nonce);
2508 ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
2509 ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
2510 vec_del1 (sa->rekey, 0);
2512 else if (vec_len (sa->new_child) > 0)
2514 ikev2_payload_add_sa (chain, sa->new_child[0].r_proposal);
2515 ikev2_payload_add_nonce (chain, sa->r_nonce);
2516 ikev2_payload_add_ts (chain, sa->new_child[0].tsi,
2518 ikev2_payload_add_ts (chain, sa->new_child[0].tsr,
2520 vec_del1 (sa->new_child, 0);
2522 else if (sa->unsupported_cp)
2524 u8 *data = vec_new (u8, 1);
2526 data[0] = sa->unsupported_cp;
2527 ikev2_payload_add_notify (
2528 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2530 sa->unsupported_cp = 0;
2534 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2540 ike->version = IKE_VERSION_2;
2541 ike->nextpayload = IKEV2_PAYLOAD_SK;
2542 tlen = sizeof (*ike);
2544 if (sa->is_initiator)
2545 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2547 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2549 tlen += vec_len (chain->data);
2550 ike->nextpayload = chain->first_payload_type;
2551 ike->length = clib_host_to_net_u32 (tlen);
2553 if (tlen + b->current_length + b->current_data > buffer_data_size)
2559 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2561 /* store whole IKE payload - needed for PSK auth */
2562 vec_reset_length (sa->last_sa_init_res_packet_data);
2563 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2567 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2568 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2571 plen = sizeof (*ph);
2572 ph = (ike_payload_header_t *) & ike->payload[0];
2573 ph->nextpayload = chain->first_payload_type;
2576 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2577 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2578 plen += vec_len (chain->data) + iv_len;
2580 /* add space for hmac/tag */
2582 plen += tr_integ->key_trunc;
2584 plen += IKEV2_GCM_ICV_SIZE;
2587 if (tlen + b->current_length + b->current_data > buffer_data_size)
2593 /* payload and total length */
2594 ph->length = clib_host_to_net_u16 (plen);
2595 ike->length = clib_host_to_net_u32 (tlen);
2599 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2600 ph->payload, (u8 *) ike,
2601 sizeof (*ike) + sizeof (*ph),
2602 ph->payload + plen - sizeof (*ph) -
2603 IKEV2_GCM_ICV_SIZE))
2611 if (!ikev2_encrypt_data
2612 (ptd, sa, tr_encr, chain->data, ph->payload))
2618 ikev2_calc_integr (tr_integ,
2619 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2620 (u8 *) ike, tlen - tr_integ->key_trunc);
2621 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2622 sizeof (*ike), integ, tr_integ->key_trunc);
2625 /* store whole IKE payload - needed for retransmit */
2626 vec_reset_length (sa->last_res_packet_data);
2627 vec_add (sa->last_res_packet_data, ike, tlen);
2631 ikev2_payload_destroy_chain (chain);
2637 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2638 ip_address_t iaddr, ip_address_t raddr,
2643 u8 payload = ike->nextpayload;
2645 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2646 ip_address_cmp (&sa->iaddr, &iaddr) ||
2647 ip_address_cmp (&sa->raddr, &raddr))
2652 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2654 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2655 u32 plen = clib_net_to_host_u16 (ikep->length);
2657 if (plen < sizeof (ike_payload_header_t))
2660 if (payload == IKEV2_PAYLOAD_NONCE &&
2661 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2663 /* req is retransmit */
2664 if (sa->state == IKEV2_STATE_SA_INIT)
2666 sa->stats.n_init_retransmit++;
2667 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2668 u32 slen = clib_net_to_host_u32 (tmp->length);
2669 ike->ispi = tmp->ispi;
2670 ike->rspi = tmp->rspi;
2671 ike->nextpayload = tmp->nextpayload;
2672 ike->version = tmp->version;
2673 ike->exchange = tmp->exchange;
2674 ike->flags = tmp->flags;
2675 ike->msgid = tmp->msgid;
2676 ike->length = tmp->length;
2677 clib_memcpy_fast (ike->payload, tmp->payload,
2678 slen - sizeof (*ike));
2679 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2680 "ispi %lx IKE_SA_INIT retransmit "
2681 "from %d.%d.%d.%d to %d.%d.%d.%d",
2683 ip_addr_v4 (&raddr).as_u32,
2684 ip_addr_v4 (&iaddr).as_u32);
2687 /* else ignore req */
2690 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2691 "ispi %lx IKE_SA_INIT ignore "
2692 "from %d.%d.%d.%d to %d.%d.%d.%d",
2694 ip_addr_v4 (&raddr).as_u32,
2695 ip_addr_v4 (&iaddr).as_u32);
2699 payload = ikep->nextpayload;
2707 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2708 ip_address_t raddr, u32 rlen)
2712 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2715 pool_foreach (sa, ptd->sas) {
2716 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2722 /* req is not retransmit */
2727 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2729 if (ike_hdr_is_response (ike))
2732 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2735 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2737 sa->last_msg_id = msg_id;
2741 /* retransmitted req */
2742 if (msg_id == sa->last_msg_id)
2744 sa->stats.n_retransmit++;
2745 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2746 u32 slen = clib_net_to_host_u32 (tmp->length);
2747 ike->ispi = tmp->ispi;
2748 ike->rspi = tmp->rspi;
2749 ike->nextpayload = tmp->nextpayload;
2750 ike->version = tmp->version;
2751 ike->exchange = tmp->exchange;
2752 ike->flags = tmp->flags;
2753 ike->msgid = tmp->msgid;
2754 ike->length = tmp->length;
2755 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2756 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2757 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2758 ip_addr_v4 (&sa->iaddr).as_u32);
2762 /* old req ignore */
2763 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2764 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2765 ip_addr_v4 (&sa->iaddr).as_u32);
2770 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2772 ikev2_main_t *km = &ikev2_main;
2773 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2774 sa->profile_index = ~0;
2778 ikev2_del_sa_init_from_main (u64 * ispi)
2780 ikev2_main_t *km = &ikev2_main;
2781 uword *p = hash_get (km->sa_by_ispi, *ispi);
2784 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2785 hash_unset (km->sa_by_ispi, sai->ispi);
2786 ikev2_sa_free_all_vec (sai);
2787 pool_put (km->sais, sai);
2792 ikev2_del_sa_init (u64 ispi)
2794 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2798 static_always_inline void
2799 ikev2_rewrite_v6_addrs (ikev2_sa_t * sa, ip6_header_t * ih)
2801 if (sa->is_initiator)
2803 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2804 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2808 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2809 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2813 static_always_inline void
2814 ikev2_rewrite_v4_addrs (ikev2_sa_t * sa, ip4_header_t * ih)
2816 if (sa->is_initiator)
2818 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2819 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2823 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2824 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2828 static_always_inline void
2829 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2830 const ip_address_family_t af)
2832 ip_address_set (&sa->raddr, raddr, af);
2833 ip_address_set (&sa->iaddr, iaddr, af);
2837 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2838 ip6_header_t * ip6, u8 is_ip4)
2843 src = ip4->src_address.as_u32;
2844 dst = ip4->dst_address.as_u32;
2848 src = ip6->src_address.as_u32[3];
2849 dst = ip6->dst_address.as_u32[3];
2851 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2852 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2853 exchange, src, dst);
2857 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2859 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2861 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2864 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2865 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2866 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2867 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
2871 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
2873 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
2875 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
2877 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
2879 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
2883 static_always_inline uword
2884 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
2885 vlib_frame_t *frame, u8 is_ip4, u8 natt)
2887 u32 n_left = frame->n_vectors, *from;
2888 ikev2_main_t *km = &ikev2_main;
2889 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
2890 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
2891 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2892 ikev2_stats_t _stats, *stats = &_stats;
2895 /* no NAT traversal for ip6 */
2896 ASSERT (!natt || is_ip4);
2898 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
2899 from = vlib_frame_vector_args (frame);
2900 vlib_get_buffers (vm, from, bufs, n_left);
2905 vlib_buffer_t *b0 = b[0];
2906 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
2907 : IKEV2_NEXT_IP6_ERROR_DROP;
2908 ip4_header_t *ip40 = 0;
2909 ip6_header_t *ip60 = 0;
2912 ikev2_sa_t *sa0 = 0;
2913 ikev2_sa_t sa; /* temporary store for SA */
2920 u8 *ptr = vlib_buffer_get_current (b0);
2921 ip40 = (ip4_header_t *) ptr;
2922 ptr += sizeof (*ip40);
2923 udp0 = (udp_header_t *) ptr;
2924 ptr += sizeof (*udp0);
2925 ike0 = (ike_header_t *) ptr;
2926 ip_hdr_sz = sizeof (*ip40);
2930 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
2931 ike0 = vlib_buffer_get_current (b0);
2932 vlib_buffer_advance (b0, -sizeof (*udp0));
2933 udp0 = vlib_buffer_get_current (b0);
2937 ip40 = (ip4_header_t *) ipx_hdr;
2938 ip_hdr_sz = sizeof (*ip40);
2942 ip60 = (ip6_header_t *) ipx_hdr;
2943 ip_hdr_sz = sizeof (*ip60);
2945 vlib_buffer_advance (b0, -ip_hdr_sz);
2948 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
2950 /* check for non-esp marker */
2953 ASSERT (*((u32 *) ike0) == 0);
2955 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
2956 rlen -= sizeof (ikev2_non_esp_marker);
2959 if (clib_net_to_host_u32 (ike0->length) != rlen)
2961 vlib_node_increment_counter (vm, node->node_index,
2962 IKEV2_ERROR_BAD_LENGTH, 1);
2966 if (ike0->version != IKE_VERSION_2)
2968 vlib_node_increment_counter (vm, node->node_index,
2969 IKEV2_ERROR_NOT_IKEV2, 1);
2973 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2976 clib_memset (sa0, 0, sizeof (*sa0));
2978 if (ike_hdr_is_initiator (ike0))
2980 sa0->stats.n_sa_init_req++;
2981 stats->n_sa_init_req++;
2982 if (ike0->rspi == 0)
2985 ikev2_set_ip_address (sa0, &ip40->src_address,
2986 &ip40->dst_address, AF_IP4);
2988 ikev2_set_ip_address (sa0, &ip60->src_address,
2989 &ip60->dst_address, AF_IP6);
2991 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
2994 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2998 vlib_node_increment_counter (vm, node->node_index,
3001 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3003 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3008 res = ikev2_process_sa_init_req (
3009 vm, sa0, ike0, udp0, rlen,
3010 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3012 vlib_node_increment_counter (vm, node->node_index,
3013 IKEV2_ERROR_MALFORMED_PACKET,
3016 if (sa0->state == IKEV2_STATE_SA_INIT)
3018 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3020 ikev2_select_proposal (sa0->i_proposals,
3021 IKEV2_PROTOCOL_IKE);
3022 ikev2_generate_sa_init_data_and_log (sa0);
3025 if (sa0->state == IKEV2_STATE_SA_INIT
3026 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3028 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3030 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3032 vlib_node_increment_counter (vm, node->node_index,
3033 IKEV2_ERROR_NO_BUFF_SPACE,
3037 if (sa0->state == IKEV2_STATE_SA_INIT)
3039 /* add SA to the pool */
3040 pool_get (ptd->sas, sa0);
3041 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3042 ikev2_init_sa (vm, sa0);
3043 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3047 ikev2_sa_free_all_vec (sa0);
3051 else //received sa_init without initiator flag
3054 ikev2_set_ip_address (sa0, &ip40->dst_address,
3055 &ip40->src_address, AF_IP4);
3057 ikev2_set_ip_address (sa0, &ip60->dst_address,
3058 &ip60->src_address, AF_IP6);
3060 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3062 if (sa0->state == IKEV2_STATE_SA_INIT)
3065 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3066 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3069 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3071 if (clib_atomic_bool_cmp_and_swap
3072 (&sai->init_response_received, 0, 1))
3074 ikev2_complete_sa_data (sa0, sai);
3075 ikev2_calc_keys (sa0);
3076 ikev2_sa_auth_init (sa0);
3077 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3079 clib_net_to_host_u32 (sai->last_init_msg_id);
3080 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3081 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3084 vlib_node_increment_counter (vm,
3086 IKEV2_ERROR_NO_BUFF_SPACE,
3091 /* we've already processed sa-init response */
3092 sa0->state = IKEV2_STATE_UNKNOWN;
3097 if (sa0->state == IKEV2_STATE_SA_INIT)
3099 /* add SA to the pool */
3100 pool_get (ptd->sas, sa0);
3101 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3102 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3106 ikev2_sa_free_all_vec (sa0);
3110 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3113 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3116 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3117 slen = ikev2_retransmit_resp (sa0, ike0);
3120 vlib_node_increment_counter (vm, node->node_index,
3123 IKEV2_ERROR_IKE_REQ_IGNORE
3125 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3130 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3131 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3133 ikev2_sa_auth (sa0);
3135 vlib_node_increment_counter (vm, node->node_index,
3136 IKEV2_ERROR_MALFORMED_PACKET, 1);
3137 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3139 ikev2_initial_contact_cleanup (ptd, sa0);
3140 ikev2_sa_match_ts (sa0);
3141 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3142 ikev2_create_tunnel_interface (vm, sa0,
3147 if (sa0->is_initiator)
3149 sa0->last_msg_id = ~0;
3150 ikev2_del_sa_init (sa0->ispi);
3154 sa0->stats.n_sa_auth_req++;
3155 stats->n_sa_auth_req++;
3156 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3158 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3160 vlib_node_increment_counter (vm, node->node_index,
3161 IKEV2_ERROR_NO_BUFF_SPACE,
3166 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3169 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3172 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3173 slen = ikev2_retransmit_resp (sa0, ike0);
3176 vlib_node_increment_counter (vm, node->node_index,
3179 IKEV2_ERROR_IKE_REQ_IGNORE
3181 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3186 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3189 vlib_node_increment_counter (vm, node->node_index,
3190 IKEV2_ERROR_MALFORMED_PACKET,
3198 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3200 ikev2_delete_t *d, *tmp, *resp = 0;
3201 vec_foreach (d, sa0->del)
3203 ikev2_child_sa_t *ch_sa;
3204 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3206 !sa0->is_initiator);
3209 ikev2_delete_tunnel_interface (km->vnet_main,
3211 if (!sa0->is_initiator)
3213 vec_add2 (resp, tmp, 1);
3214 tmp->protocol_id = d->protocol_id;
3215 tmp->spi = ch_sa->r_proposals[0].spi;
3217 ikev2_sa_del_child_sa (sa0, ch_sa);
3220 if (!sa0->is_initiator)
3222 vec_free (sa0->del);
3227 if (ike_hdr_is_request (ike0))
3229 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3231 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3233 vlib_node_increment_counter (vm, node->node_index,
3234 IKEV2_ERROR_NO_BUFF_SPACE,
3239 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3242 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3245 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3246 slen = ikev2_retransmit_resp (sa0, ike0);
3249 vlib_node_increment_counter (vm, node->node_index,
3252 IKEV2_ERROR_IKE_REQ_IGNORE
3254 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3259 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3262 vlib_node_increment_counter (vm, node->node_index,
3263 IKEV2_ERROR_MALFORMED_PACKET,
3271 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3274 ikev2_sa_free_all_child_sa (&sa0->childs);
3275 ikev2_child_sa_t *child;
3276 vec_add2 (sa0->childs, child, 1);
3277 clib_memset (child, 0, sizeof (*child));
3278 child->r_proposals = sa0->rekey[0].r_proposal;
3279 child->i_proposals = sa0->rekey[0].i_proposal;
3280 child->tsi = sa0->rekey[0].tsi;
3281 child->tsr = sa0->rekey[0].tsr;
3282 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3283 child - sa0->childs, 1);
3285 if (ike_hdr_is_response (ike0))
3287 vec_free (sa0->rekey);
3291 stats->n_rekey_req++;
3292 sa0->stats.n_rekey_req++;
3293 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3295 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3297 vlib_node_increment_counter (vm, node->node_index,
3298 IKEV2_ERROR_NO_BUFF_SPACE,
3302 else if (sa0->new_child)
3304 ikev2_child_sa_t *c;
3305 vec_add2 (sa0->childs, c, 1);
3306 memset (c, 0, sizeof (*c));
3307 c->r_proposals = sa0->new_child[0].r_proposal;
3308 c->i_proposals = sa0->new_child[0].i_proposal;
3309 c->tsi = sa0->new_child[0].tsi;
3310 c->tsr = sa0->new_child[0].tsr;
3311 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3312 c - sa0->childs, 0);
3313 if (ike_hdr_is_request (ike0))
3315 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3317 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3319 vlib_node_increment_counter (
3320 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3327 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3331 /* if we are sending packet back, rewrite headers */
3332 if (slen && ~0 != slen)
3336 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3337 ikev2_rewrite_v4_addrs (sa0, ip40);
3341 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3342 ikev2_rewrite_v6_addrs (sa0, ip60);
3347 udp0->dst_port = udp0->src_port =
3348 clib_net_to_host_u16 (ikev2_get_port (sa0));
3350 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3351 && ikev2_natt_active (sa0))
3354 slen = ikev2_insert_non_esp_marker (ike0, slen);
3360 slen += sizeof (ikev2_non_esp_marker);
3362 u16 tp = udp0->dst_port;
3363 udp0->dst_port = udp0->src_port;
3364 udp0->src_port = tp;
3367 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3369 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3372 ip40->length = clib_host_to_net_u16 (b0->current_length);
3373 ip40->checksum = ip4_header_checksum (ip40);
3377 ip60->payload_length =
3378 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3382 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3383 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3385 ikev2_child_sa_t *c;
3387 vec_foreach (c, sa0->childs)
3388 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3390 ikev2_delete_sa (ptd, sa0);
3392 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3393 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3396 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3397 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3398 t->next_index = next[0];
3405 ikev2_update_stats (vm, node->node_index, stats);
3406 vlib_node_increment_counter (vm, node->node_index,
3407 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3408 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3409 return frame->n_vectors;
3413 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3415 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3419 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3420 vlib_frame_t *frame)
3422 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3426 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3428 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3432 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3433 .function = ikev2_ip4,
3434 .name = "ikev2-ip4",
3435 .vector_size = sizeof (u32),
3436 .format_trace = format_ikev2_trace,
3437 .type = VLIB_NODE_TYPE_INTERNAL,
3439 .n_errors = IKEV2_N_ERROR,
3440 .error_counters = ikev2_error_counters,
3442 .n_next_nodes = IKEV2_IP4_N_NEXT,
3444 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3445 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3449 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3450 .function = ikev2_ip4_natt,
3451 .name = "ikev2-ip4-natt",
3452 .vector_size = sizeof (u32),
3453 .format_trace = format_ikev2_trace,
3454 .type = VLIB_NODE_TYPE_INTERNAL,
3456 .n_errors = IKEV2_N_ERROR,
3457 .error_counters = ikev2_error_counters,
3459 .n_next_nodes = IKEV2_IP4_N_NEXT,
3461 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3462 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3466 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3467 .function = ikev2_ip6,
3468 .name = "ikev2-ip6",
3469 .vector_size = sizeof (u32),
3470 .format_trace = format_ikev2_trace,
3471 .type = VLIB_NODE_TYPE_INTERNAL,
3473 .n_errors = IKEV2_N_ERROR,
3474 .error_counters = ikev2_error_counters,
3476 .n_next_nodes = IKEV2_IP6_N_NEXT,
3478 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3479 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3484 // set ikev2 proposals when vpp is used as initiator
3485 static clib_error_t *
3486 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3487 ikev2_transforms_set * ts,
3488 ikev2_sa_proposal_t ** proposals, int is_ike)
3491 ikev2_main_t *km = &ikev2_main;
3492 ikev2_sa_proposal_t *proposal;
3493 vec_add2 (*proposals, proposal, 1);
3494 ikev2_sa_transform_t *td;
3499 vec_foreach (td, km->supported_transforms)
3501 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3502 && td->encr_type == ts->crypto_alg
3503 && td->key_len == ts->crypto_key_size / 8)
3506 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3507 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3508 vec_add (td->attrs, (u8 *) attr, 4);
3509 vec_add1 (proposal->transforms, *td);
3518 r = clib_error_return (0, "Unsupported algorithm");
3522 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3526 vec_foreach (td, km->supported_transforms)
3528 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3529 && td->integ_type == ts->integ_alg)
3531 vec_add1 (proposal->transforms, *td);
3539 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3540 r = clib_error_return (0, "Unsupported algorithm");
3549 vec_foreach (td, km->supported_transforms)
3551 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3552 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3554 vec_add1 (proposal->transforms, *td);
3561 r = clib_error_return (0, "Unsupported algorithm");
3570 vec_foreach (td, km->supported_transforms)
3572 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3574 vec_add1 (proposal->transforms, *td);
3577 sa->dh_group = td->dh_type;
3585 r = clib_error_return (0, "Unsupported algorithm");
3593 vec_foreach (td, km->supported_transforms)
3595 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3597 vec_add1 (proposal->transforms, *td);
3603 r = clib_error_return (0, "Unsupported algorithm");
3612 static ikev2_profile_t *
3613 ikev2_profile_index_by_name (u8 * name)
3615 ikev2_main_t *km = &ikev2_main;
3618 p = mhash_get (&km->profile_index_by_name, name);
3622 return pool_elt_at_index (km->profiles, p[0]);
3627 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3628 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3637 b0 = vlib_get_buffer (vm, bi0);
3638 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3639 udp0 = vlib_buffer_get_current (b0);
3640 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3641 udp0->src_port = clib_host_to_net_u16 (src_port);
3642 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3645 if (ip_addr_version (dst) == AF_IP4)
3647 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3648 ip40 = vlib_buffer_get_current (b0);
3649 ip40->ip_version_and_header_length = 0x45;
3651 ip40->fragment_id = 0;
3652 ip40->flags_and_fragment_offset = 0;
3654 ip40->protocol = IP_PROTOCOL_UDP;
3655 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3656 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3657 b0->current_length =
3658 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3659 ip40->length = clib_host_to_net_u16 (b0->current_length);
3660 ip40->checksum = ip4_header_checksum (ip40);
3664 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3665 ip60 = vlib_buffer_get_current (b0);
3667 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3668 ip60->ip_version_traffic_class_and_flow_label =
3669 clib_host_to_net_u32 (0x6 << 28);
3670 ip60->payload_length =
3671 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3672 ip60->protocol = IP_PROTOCOL_UDP;
3673 ip60->hop_limit = 0xff;
3674 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3675 sizeof (ip60->src_address));
3676 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3677 sizeof (ip60->src_address));
3680 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3681 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3682 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3684 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3685 ip4_lookup_node.index : ip6_lookup_node.index;
3687 /* send the request */
3688 f = vlib_get_frame_to_node (vm, next_index);
3689 to_next = vlib_frame_vector_args (f);
3692 vlib_put_frame_to_node (vm, next_index, f);
3697 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3700 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3705 *b = vlib_get_buffer (vm, bi0);
3710 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3712 ikev2_main_t *km = &ikev2_main;
3715 EVP_PKEY_free (km->pkey);
3716 km->pkey = ikev2_load_key_file (file);
3717 if (km->pkey == NULL)
3718 return clib_error_return (0, "load key '%s' failed", file);
3723 static_always_inline vnet_api_error_t
3724 ikev2_register_udp_port (ikev2_profile_t * p, u16 port)
3726 ipsec_register_udp_port (port);
3727 p->ipsec_over_udp_port = port;
3731 static_always_inline void
3732 ikev2_unregister_udp_port (ikev2_profile_t * p)
3734 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3737 ipsec_unregister_udp_port (p->ipsec_over_udp_port);
3738 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3742 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3743 ikev2_main_per_thread_data_t * tkm,
3744 ikev2_sa_t * sa, u8 send_notification)
3746 ikev2_main_t *km = &ikev2_main;
3747 ip_address_t *src, *dst;
3749 ikev2_child_sa_t *c;
3751 /* Create the Initiator notification for IKE SA removal */
3756 vec_resize (sa->del, 1);
3757 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3758 sa->del->spi = sa->ispi;
3760 if (send_notification)
3762 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3765 ikev2_log_error ("buffer alloc failure");
3769 ike0 = vlib_buffer_get_current (b0);
3770 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3771 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3772 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3774 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3775 sa->last_init_msg_id += 1;
3776 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3780 if (ikev2_natt_active (sa))
3781 len = ikev2_insert_non_esp_marker (ike0, len);
3783 if (sa->is_initiator)
3794 ikev2_send_ike (vm, src, dst, bi0, len,
3795 ikev2_get_port (sa), sa->dst_port, 0);
3799 /* delete local SA */
3800 vec_foreach (c, sa->childs)
3801 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3803 u64 rspi = sa->rspi;
3804 ikev2_sa_free_all_vec (sa);
3805 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3808 hash_unset (tkm->sa_by_rspi, rspi);
3809 pool_put (tkm->sas, sa);
3814 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3816 ikev2_main_per_thread_data_t *tkm;
3818 u32 pi = p - km->profiles;
3823 pool_foreach (sa, km->sais) {
3824 if (pi == sa->profile_index)
3825 vec_add1 (del_sai, sa - km->sais);
3829 vec_foreach (sai, del_sai)
3831 sa = pool_elt_at_index (km->sais, sai[0]);
3832 ikev2_sa_free_all_vec (sa);
3833 hash_unset (km->sa_by_ispi, sa->ispi);
3834 pool_put (km->sais, sa);
3836 vec_reset_length (del_sai);
3838 vec_foreach (tkm, km->per_thread_data)
3841 pool_foreach (sa, tkm->sas) {
3842 if (sa->profile_index != ~0 && pi == sa->profile_index)
3843 vec_add1 (del_sai, sa - tkm->sas);
3847 vec_foreach (sai, del_sai)
3849 sa = pool_elt_at_index (tkm->sas, sai[0]);
3850 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3853 vec_reset_length (del_sai);
3860 ikev2_profile_free (ikev2_profile_t * p)
3864 vec_free (p->auth.data);
3866 EVP_PKEY_free (p->auth.key);
3868 vec_free (p->loc_id.data);
3869 vec_free (p->rem_id.data);
3873 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
3875 ikev2_main_t *km = &ikev2_main;
3880 if (ikev2_profile_index_by_name (name))
3881 return clib_error_return (0, "policy %v already exists", name);
3883 pool_get (km->profiles, p);
3884 clib_memset (p, 0, sizeof (*p));
3885 p->name = vec_dup (name);
3886 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3887 p->responder.sw_if_index = ~0;
3889 uword index = p - km->profiles;
3890 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
3894 p = ikev2_profile_index_by_name (name);
3896 return clib_error_return (0, "policy %v does not exists", name);
3898 ikev2_unregister_udp_port (p);
3899 ikev2_cleanup_profile_sessions (km, p);
3901 ikev2_profile_free (p);
3902 pool_put (km->profiles, p);
3903 mhash_unset (&km->profile_index_by_name, name, 0);
3909 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
3910 u8 * auth_data, u8 data_hex_format)
3915 p = ikev2_profile_index_by_name (name);
3919 r = clib_error_return (0, "unknown profile %v", name);
3924 EVP_PKEY_free (p->auth.key);
3925 vec_free (p->auth.data);
3927 p->auth.method = auth_method;
3928 p->auth.data = vec_dup (auth_data);
3929 p->auth.hex = data_hex_format;
3931 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
3933 vec_add1 (p->auth.data, 0);
3934 p->auth.key = ikev2_load_cert_file (p->auth.data);
3935 if (p->auth.key == NULL)
3936 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
3943 ikev2_is_id_supported (u8 id_type)
3945 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
3946 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
3947 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
3948 id_type == IKEV2_ID_TYPE_ID_FQDN);
3952 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
3958 if (!ikev2_is_id_supported (id_type))
3960 r = clib_error_return (0, "unsupported identity type %U",
3961 format_ikev2_id_type, id_type);
3965 p = ikev2_profile_index_by_name (name);
3969 r = clib_error_return (0, "unknown profile %v", name);
3975 vec_free (p->loc_id.data);
3976 p->loc_id.type = id_type;
3977 p->loc_id.data = vec_dup (data);
3981 vec_free (p->rem_id.data);
3982 p->rem_id.type = id_type;
3983 p->rem_id.data = vec_dup (data);
3989 static_always_inline void
3990 ikev2_set_ts_type (ikev2_ts_t * ts, const ip_address_t * addr)
3992 if (ip_addr_version (addr) == AF_IP4)
3993 ts->ts_type = TS_IPV4_ADDR_RANGE;
3995 ts->ts_type = TS_IPV6_ADDR_RANGE;
3998 static_always_inline void
3999 ikev2_set_ts_addrs (ikev2_ts_t * ts, const ip_address_t * start,
4000 const ip_address_t * end)
4002 ip_address_copy (&ts->start_addr, start);
4003 ip_address_copy (&ts->end_addr, end);
4007 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4008 u16 start_port, u16 end_port, ip_address_t start_addr,
4009 ip_address_t end_addr, int is_local)
4014 p = ikev2_profile_index_by_name (name);
4018 r = clib_error_return (0, "unknown profile %v", name);
4022 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4023 return clib_error_return (0, "IP address version mismatch!");
4027 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4028 p->loc_ts.start_port = start_port;
4029 p->loc_ts.end_port = end_port;
4030 p->loc_ts.protocol_id = protocol_id;
4031 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4035 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4036 p->rem_ts.start_port = start_port;
4037 p->rem_ts.end_port = end_port;
4038 p->rem_ts.protocol_id = protocol_id;
4039 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4047 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4048 u32 sw_if_index, ip_address_t addr)
4053 p = ikev2_profile_index_by_name (name);
4057 r = clib_error_return (0, "unknown profile %v", name);
4061 p->responder.sw_if_index = sw_if_index;
4062 ip_address_copy (&p->responder.addr, &addr);
4068 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4069 ikev2_transform_encr_type_t crypto_alg,
4070 ikev2_transform_integ_type_t integ_alg,
4071 ikev2_transform_dh_type_t dh_type,
4072 u32 crypto_key_size)
4077 p = ikev2_profile_index_by_name (name);
4081 r = clib_error_return (0, "unknown profile %v", name);
4085 p->ike_ts.crypto_alg = crypto_alg;
4086 p->ike_ts.integ_alg = integ_alg;
4087 p->ike_ts.dh_type = dh_type;
4088 p->ike_ts.crypto_key_size = crypto_key_size;
4093 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4094 ikev2_transform_encr_type_t crypto_alg,
4095 ikev2_transform_integ_type_t integ_alg,
4096 u32 crypto_key_size)
4101 p = ikev2_profile_index_by_name (name);
4105 r = clib_error_return (0, "unknown profile %v", name);
4109 p->esp_ts.crypto_alg = crypto_alg;
4110 p->esp_ts.integ_alg = integ_alg;
4111 p->esp_ts.crypto_key_size = crypto_key_size;
4116 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4117 u8 * name, u32 sw_if_index)
4122 p = ikev2_profile_index_by_name (name);
4126 r = clib_error_return (0, "unknown profile %v", name);
4130 p->tun_itf = sw_if_index;
4136 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4139 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4140 vnet_api_error_t rv = 0;
4143 return VNET_API_ERROR_INVALID_VALUE;
4147 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4148 return VNET_API_ERROR_VALUE_EXIST;
4150 rv = ikev2_register_udp_port (p, port);
4154 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4155 return VNET_API_ERROR_INVALID_VALUE;
4157 ikev2_unregister_udp_port (p);
4163 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4165 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4170 r = clib_error_return (0, "unknown profile %v", name);
4179 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4180 u64 lifetime, u32 jitter, u32 handover,
4186 p = ikev2_profile_index_by_name (name);
4190 r = clib_error_return (0, "unknown profile %v", name);
4194 p->lifetime = lifetime;
4195 p->lifetime_jitter = jitter;
4196 p->handover = handover;
4197 p->lifetime_maxdata = maxdata;
4202 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4203 ip_address_t * out_addr)
4205 ip4_address_t *if_ip4;
4206 ip6_address_t *if_ip6;
4210 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4213 ip_address_set (out_addr, if_ip4, AF_IP4);
4219 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4222 ip_address_set (out_addr, if_ip6, AF_IP6);
4230 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4234 ikev2_main_t *km = &ikev2_main;
4238 int len = sizeof (ike_header_t), valid_ip = 0;
4239 ip_address_t if_ip = ip_address_initializer;
4241 p = ikev2_profile_index_by_name (name);
4245 r = clib_error_return (0, "unknown profile %v", name);
4249 if (p->responder.sw_if_index == ~0
4250 || ip_address_is_zero (&p->responder.addr))
4252 r = clib_error_return (0, "responder not set for profile %v", name);
4256 if (ikev2_get_if_address (p->responder.sw_if_index,
4257 ip_addr_version (&p->responder.addr), &if_ip))
4262 /* Prepare the SA and the IKE payload */
4264 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4265 ikev2_payload_chain_t *chain = 0;
4266 ikev2_payload_new_chain (chain);
4268 /* Build the IKE proposal payload */
4269 ikev2_sa_proposal_t *proposals = 0;
4270 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4271 proposals[0].proposal_num = 1;
4272 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4274 /* Add and then cleanup proposal data */
4275 ikev2_payload_add_sa (chain, proposals);
4276 ikev2_sa_free_proposal_vector (&proposals);
4278 sa.is_initiator = 1;
4279 sa.profile_index = p - km->profiles;
4280 sa.state = IKEV2_STATE_SA_INIT;
4281 sa.tun_itf = p->tun_itf;
4282 sa.udp_encap = p->udp_encap;
4283 if (p->natt_disabled)
4284 sa.natt_state = IKEV2_NATT_DISABLED;
4285 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4286 sa.is_tun_itf_set = 1;
4287 sa.initial_contact = 1;
4288 sa.dst_port = IKEV2_PORT;
4290 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4291 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4293 ikev2_sa_free_all_vec (&sa);
4294 ikev2_payload_destroy_chain (chain);
4295 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4298 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4299 ikev2_payload_add_nonce (chain, sa.i_nonce);
4301 /* Build the child SA proposal */
4302 vec_resize (sa.childs, 1);
4303 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4304 &sa.childs[0].i_proposals, 0);
4305 sa.childs[0].i_proposals[0].proposal_num = 1;
4306 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4307 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4308 sizeof (sa.childs[0].i_proposals[0].spi));
4310 /* Add NAT detection notification messages (mandatory) */
4311 u8 *nat_detection_sha1 =
4312 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4313 clib_host_to_net_u64 (sa.rspi),
4314 &if_ip, clib_host_to_net_u16 (IKEV2_PORT));
4316 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4317 nat_detection_sha1);
4318 vec_free (nat_detection_sha1);
4319 nat_detection_sha1 =
4320 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4321 clib_host_to_net_u64 (sa.rspi),
4323 clib_host_to_net_u16 (sa.dst_port));
4324 ikev2_payload_add_notify (chain,
4325 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4326 nat_detection_sha1);
4327 vec_free (nat_detection_sha1);
4329 u8 *sig_hash_algo = vec_new (u8, 8);
4330 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4331 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4332 ikev2_payload_add_notify (chain,
4333 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4335 vec_free (sig_hash_algo);
4337 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4340 ikev2_sa_free_all_vec (&sa);
4341 ikev2_payload_destroy_chain (chain);
4342 char *errmsg = "buffer alloc failure";
4343 ikev2_log_error (errmsg);
4344 return clib_error_return (0, errmsg);
4346 ike0 = vlib_buffer_get_current (b0);
4348 /* Buffer update and boilerplate */
4349 len += vec_len (chain->data);
4350 ike0->nextpayload = chain->first_payload_type;
4351 ike0->length = clib_host_to_net_u32 (len);
4352 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4353 ikev2_payload_destroy_chain (chain);
4355 ike0->version = IKE_VERSION_2;
4356 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4357 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4358 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4361 sa.last_init_msg_id += 1;
4363 /* store whole IKE payload - needed for PSK auth */
4364 vec_reset_length (sa.last_sa_init_req_packet_data);
4365 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4367 /* add data to the SA then add it to the pool */
4368 ip_address_copy (&sa.iaddr, &if_ip);
4369 ip_address_copy (&sa.raddr, &p->responder.addr);
4370 sa.i_id.type = p->loc_id.type;
4371 sa.i_id.data = vec_dup (p->loc_id.data);
4372 sa.r_id.type = p->rem_id.type;
4373 sa.r_id.data = vec_dup (p->rem_id.data);
4374 sa.i_auth.method = p->auth.method;
4375 sa.i_auth.hex = p->auth.hex;
4376 sa.i_auth.data = vec_dup (p->auth.data);
4377 sa.sw_if_index = p->responder.sw_if_index;
4378 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4379 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4381 ikev2_initial_contact_cleanup (0, &sa);
4383 /* add SA to the pool */
4384 ikev2_sa_t *sa0 = 0;
4385 pool_get (km->sais, sa0);
4386 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4387 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4391 ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len,
4392 IKEV2_PORT, sa.dst_port, sa.sw_if_index);
4395 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4396 clib_host_to_net_u64 (sa0->ispi), 0,
4397 ip_addr_v4 (&p->responder.addr).as_u32,
4398 ip_addr_version (&p->responder.addr) == AF_IP4);
4403 clib_error_return (0, "interface %U does not have any IP address!",
4404 format_vnet_sw_if_index_name, vnet_get_main (),
4405 p->responder.sw_if_index);
4413 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4414 ikev2_child_sa_t * csa)
4416 /* Create the Initiator notification for child SA removal */
4417 ikev2_main_t *km = &ikev2_main;
4423 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4426 ikev2_log_error ("buffer alloc failure");
4430 ike0 = vlib_buffer_get_current (b0);
4431 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4432 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4433 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4435 vec_resize (sa->del, 1);
4436 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4437 sa->del->spi = csa->i_proposals->spi;
4438 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4439 sa->last_init_msg_id += 1;
4440 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4444 if (ikev2_natt_active (sa))
4445 len = ikev2_insert_non_esp_marker (ike0, len);
4446 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4447 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4449 /* delete local child SA */
4450 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4451 ikev2_sa_del_child_sa (sa, csa);
4455 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4458 ikev2_main_t *km = &ikev2_main;
4459 ikev2_main_per_thread_data_t *tkm;
4460 ikev2_sa_t *fsa = 0;
4461 ikev2_child_sa_t *fchild = 0;
4463 /* Search for the child SA */
4464 vec_foreach (tkm, km->per_thread_data)
4470 pool_foreach (sa, tkm->sas) {
4471 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4481 if (!fchild || !fsa)
4483 r = clib_error_return (0, "Child SA not found");
4488 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4495 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4498 ikev2_main_t *km = &ikev2_main;
4499 ikev2_main_per_thread_data_t *tkm;
4500 ikev2_sa_t *fsa = 0;
4501 ikev2_main_per_thread_data_t *ftkm = 0;
4503 /* Search for the IKE SA */
4504 vec_foreach (tkm, km->per_thread_data)
4510 pool_foreach (sa, tkm->sas) {
4511 if (sa->ispi == ispi)
4523 r = clib_error_return (0, "IKE SA not found");
4527 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4532 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4533 ikev2_child_sa_t * csa)
4535 /* Create the Initiator request for create child SA */
4541 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4544 ikev2_log_error ("buffer alloc failure");
4548 ike0 = vlib_buffer_get_current (b0);
4549 ike0->version = IKE_VERSION_2;
4550 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4551 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4552 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4553 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4554 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4555 sa->last_init_msg_id += 1;
4557 ikev2_rekey_t *rekey;
4558 vec_reset_length (sa->rekey);
4559 vec_add2 (sa->rekey, rekey, 1);
4560 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4563 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4564 rekey->spi = proposals[0].spi;
4565 rekey->ispi = csa->i_proposals->spi;
4566 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4570 if (ikev2_natt_active (sa))
4571 len = ikev2_insert_non_esp_marker (ike0, len);
4572 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4573 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4574 vec_free (proposals);
4578 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4581 ikev2_main_t *km = &ikev2_main;
4582 ikev2_main_per_thread_data_t *tkm;
4583 ikev2_sa_t *fsa = 0;
4584 ikev2_child_sa_t *fchild = 0;
4586 /* Search for the child SA */
4587 vec_foreach (tkm, km->per_thread_data)
4593 pool_foreach (sa, tkm->sas) {
4594 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4604 if (!fchild || !fsa)
4606 r = clib_error_return (0, "Child SA not found");
4611 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4618 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4620 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4624 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4626 u64 *ispi, *ispi_vec = 0;
4627 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4628 ikev2_main_t *km = &ikev2_main;
4629 ikev2_main_per_thread_data_t *tkm;
4630 p->responder.sw_if_index = ~0;
4632 vec_foreach (tkm, km->per_thread_data)
4635 pool_foreach (sa, tkm->sas) {
4636 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4637 vec_add1 (sa_vec, sa);
4641 vec_foreach (sap, sa_vec)
4643 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4645 vec_reset_length (sa_vec);
4650 pool_foreach (sa, km->sais) {
4651 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4652 vec_add1 (ispi_vec, sa->ispi);
4656 vec_foreach (ispi, ispi_vec)
4658 ikev2_del_sa_init_from_main (ispi);
4661 vec_free (ispi_vec);
4664 static clib_error_t *
4665 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4667 ikev2_main_t *km = &ikev2_main;
4674 pool_foreach (p, km->profiles) {
4675 if (p->responder.sw_if_index == sw_if_index)
4676 ikev2_sa_del (p, sw_if_index);
4683 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4686 ikev2_init (vlib_main_t * vm)
4688 ikev2_main_t *km = &ikev2_main;
4689 vlib_thread_main_t *tm = vlib_get_thread_main ();
4692 clib_memset (km, 0, sizeof (ikev2_main_t));
4693 km->vnet_main = vnet_get_main ();
4696 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4697 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4698 ikev2_crypto_init (km);
4700 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
4702 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
4703 CLIB_CACHE_LINE_BYTES);
4704 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
4706 ikev2_main_per_thread_data_t *ptd =
4707 vec_elt_at_index (km->per_thread_data, thread_id);
4709 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
4711 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
4712 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
4713 ptd->hmac_ctx = HMAC_CTX_new ();
4715 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
4716 ptd->evp_ctx = &ptd->_evp_ctx;
4717 HMAC_CTX_init (&(ptd->_hmac_ctx));
4718 ptd->hmac_ctx = &ptd->_hmac_ctx;
4722 km->sa_by_ispi = hash_create (0, sizeof (uword));
4723 km->sw_if_indices = hash_create (0, 0);
4725 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4726 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4727 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4728 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4730 vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2-ip4-natt");
4731 vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4733 ikev2_cli_reference ();
4735 km->log_level = IKEV2_LOG_ERROR;
4736 km->log_class = vlib_log_register_class ("ikev2", 0);
4741 VLIB_INIT_FUNCTION (ikev2_init) =
4743 .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"),
4748 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4751 ikev2_main_t *km = &ikev2_main;
4752 ikev2_profile_t *p = 0;
4753 vlib_main_t *vm = km->vlib_main;
4754 f64 now = vlib_time_now (vm);
4757 if (sa->profile_index != ~0)
4758 p = pool_elt_at_index (km->profiles, sa->profile_index);
4760 if (sa->is_initiator && p && csa->time_to_expiration
4761 && now > csa->time_to_expiration)
4763 if (!csa->is_expired || csa->rekey_retries > 0)
4765 ikev2_rekey_child_sa_internal (vm, sa, csa);
4766 csa->time_to_expiration = now + p->handover;
4767 csa->is_expired = 1;
4768 if (csa->rekey_retries == 0)
4770 csa->rekey_retries = 5;
4772 else if (csa->rekey_retries > 0)
4774 csa->rekey_retries--;
4775 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4776 csa->i_proposals->spi, csa->rekey_retries);
4777 if (csa->rekey_retries == 0)
4779 csa->rekey_retries = -1;
4786 csa->time_to_expiration = 0;
4787 ikev2_delete_child_sa_internal (vm, sa, csa);
4795 ipip_tunnel_t *ipip = NULL;
4796 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
4797 if (~0 == sw_if_index)
4799 ip46_address_t local_ip;
4800 ip46_address_t remote_ip;
4801 if (sa->is_initiator)
4803 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4804 ip_addr_bytes (&sa->iaddr));
4805 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
4806 ip_addr_bytes (&sa->raddr));
4810 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
4811 ip_addr_bytes (&sa->raddr));
4812 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
4813 ip_addr_bytes (&sa->iaddr));
4817 ipip_tunnel_key_t key = {
4820 .transport = IPIP_TRANSPORT_IP4,
4825 ipip = ipip_tunnel_db_find (&key);
4828 sw_if_index = ipip->sw_if_index;
4834 vec_add1 (sas_in, csa->remote_sa_id);
4835 vlib_worker_thread_barrier_sync (vm);
4836 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
4837 csa->local_sa_id, sas_in);
4840 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
4841 vlib_worker_thread_barrier_release (vm);
4848 ikev2_set_log_level (ikev2_log_level_t log_level)
4850 ikev2_main_t *km = &ikev2_main;
4852 if (log_level >= IKEV2_LOG_MAX)
4854 ikev2_log_error ("unknown logging level %d", log_level);
4858 km->log_level = log_level;
4863 ikev2_set_liveness_params (u32 period, u32 max_retries)
4865 ikev2_main_t *km = &ikev2_main;
4867 if (period == 0 || max_retries == 0)
4868 return clib_error_return (0, "invalid args");
4870 km->liveness_period = period;
4871 km->liveness_max_retries = max_retries;
4876 ikev2_profile_natt_disable (u8 * name)
4878 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4880 return clib_error_return (0, "unknown profile %v", name);
4882 p->natt_disabled = 1;
4887 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
4889 ikev2_main_t *km = &ikev2_main;
4890 vlib_main_t *vm = km->vlib_main;
4891 ikev2_main_per_thread_data_t *tkm;
4892 ikev2_sa_t *fsa = 0;
4893 ikev2_profile_t *p = 0;
4894 ikev2_child_sa_t *fchild = 0;
4895 f64 now = vlib_time_now (vm);
4896 vlib_counter_t counts;
4898 /* Search for the SA and child SA */
4899 vec_foreach (tkm, km->per_thread_data)
4905 pool_foreach (sa, tkm->sas) {
4906 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
4915 vlib_get_combined_counter (&ipsec_sa_counters,
4916 ipsec_sa->stat_index, &counts);
4918 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
4919 p = pool_elt_at_index (km->profiles, fsa->profile_index);
4921 if (fchild && p && p->lifetime_maxdata)
4923 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
4925 fchild->time_to_expiration = now;
4931 ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa)
4937 if (ip_address_is_zero (&sa->iaddr))
4939 p = pool_elt_at_index (km->profiles, sa->profile_index);
4940 if (!ikev2_get_if_address (p->responder.sw_if_index,
4941 ip_addr_version (&p->responder.addr),
4945 /* update NAT detection payload */
4947 ikev2_find_ike_notify_payload
4948 ((ike_header_t *) sa->last_sa_init_req_packet_data,
4949 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
4953 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
4954 clib_host_to_net_u64 (sa->rspi),
4956 clib_host_to_net_u16 (IKEV2_PORT));
4957 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
4962 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
4965 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
4966 clib_memcpy_fast (vlib_buffer_get_current (b),
4967 sa->last_sa_init_req_packet_data,
4968 vec_len (sa->last_sa_init_req_packet_data));
4970 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
4971 vec_len (sa->last_sa_init_req_packet_data),
4972 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
4976 ikev2_process_pending_sa_init (ikev2_main_t * km)
4983 hash_foreach (ispi, sai, km->sa_by_ispi,
4985 sa = pool_elt_at_index (km->sais, sai);
4986 if (sa->init_response_received)
4989 ikev2_process_pending_sa_init_one (km, sa);
4995 ikev2_send_informational_request (ikev2_sa_t * sa)
4997 ikev2_main_t *km = &ikev2_main;
4998 ip_address_t *src, *dst;
5005 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5008 ikev2_log_error ("buffer alloc failure");
5012 ike0 = vlib_buffer_get_current (b0);
5013 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5014 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5015 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5016 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5018 sa->last_init_msg_id += 1;
5019 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5023 if (ikev2_natt_active (sa))
5024 len = ikev2_insert_non_esp_marker (ike0, len);
5026 if (sa->is_initiator)
5037 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5038 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5043 ikev2_disable_dpd (void)
5045 ikev2_main_t *km = &ikev2_main;
5046 km->dpd_disabled = 1;
5049 static_always_inline int
5050 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
5052 ikev2_main_t *km = &ikev2_main;
5053 vlib_main_t *vm = km->vlib_main;
5055 if (!sa->keys_generated)
5058 if (sa->liveness_retries >= km->liveness_max_retries)
5061 f64 now = vlib_time_now (vm);
5063 if (sa->liveness_period_check < now)
5065 sa->liveness_retries++;
5066 sa->liveness_period_check = now + km->liveness_period;
5067 ikev2_send_informational_request (sa);
5073 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5076 ikev2_main_t *km = &ikev2_main;
5077 ipsec_main_t *im = &ipsec_main;
5079 ikev2_child_sa_t *c;
5084 vlib_process_wait_for_event_or_clock (vm, 2);
5085 vlib_process_get_events (vm, NULL);
5087 /* process ike child sas */
5088 ikev2_main_per_thread_data_t *tkm;
5089 vec_foreach (tkm, km->per_thread_data)
5092 u32 *to_be_deleted = 0;
5095 pool_foreach (sa, tkm->sas) {
5096 ikev2_child_sa_t *c;
5099 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5102 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5104 sa->old_remote_id_present = 0;
5108 sa->old_id_expiration -= 1;
5110 vec_foreach (c, sa->childs)
5111 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5113 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5114 vec_add1 (to_be_deleted, sa - tkm->sas);
5118 vec_foreach (sai, to_be_deleted)
5120 sa = pool_elt_at_index (tkm->sas, sai[0]);
5121 u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0);
5122 vec_foreach (c, sa->childs)
5124 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5125 ikev2_sa_del_child_sa (sa, c);
5127 ikev2_sa_free_all_vec (sa);
5128 hash_unset (tkm->sa_by_rspi, sa->rspi);
5129 pool_put (tkm->sas, sa);
5133 p = pool_elt_at_index (km->profiles, sa->profile_index);
5136 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5139 ikev2_log_error ("%U", format_clib_error, e);
5140 clib_error_free (e);
5145 vec_free (to_be_deleted);
5148 /* process ipsec sas */
5151 pool_foreach (sa, im->sad) {
5152 ikev2_mngr_process_ipsec_sa(sa);
5156 ikev2_process_pending_sa_init (km);
5162 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5163 .function = ikev2_mngr_process_fn,
5164 .type = VLIB_NODE_TYPE_PROCESS,
5166 "ikev2-manager-process",
5169 VLIB_PLUGIN_REGISTER () = {
5170 .version = VPP_BUILD_VER,
5171 .description = "Internet Key Exchange (IKEv2) Protocol",
5176 * fd.io coding-style-patch-verification: ON
5179 * eval: (c-set-style "gnu")