2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vlib/vlib.h>
17 #include <vlib/unix/plugin.h>
18 #include <vlibmemory/api.h>
19 #include <vpp/app/version.h>
20 #include <vnet/vnet.h>
21 #include <vppinfra/error.h>
22 #include <vppinfra/random.h>
23 #include <vnet/udp/udp.h>
24 #include <vnet/ipsec/ipsec.h>
25 #include <vnet/ipsec/ipsec_tun.h>
26 #include <vnet/ipip/ipip.h>
27 #include <plugins/ikev2/ikev2.h>
28 #include <plugins/ikev2/ikev2_priv.h>
29 #include <plugins/dns/dns.h>
30 #include <openssl/sha.h>
31 #include <vnet/ipsec/ipsec_punt.h>
32 #include <plugins/ikev2/ikev2.api_enum.h>
34 #define IKEV2_LIVENESS_RETRIES 3
35 #define IKEV2_LIVENESS_PERIOD_CHECK 30
37 ikev2_main_t ikev2_main;
39 static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
41 ikev2_child_sa_t * child);
43 #define ikev2_set_state(sa, v, ...) do { \
45 ikev2_elog_sa_state("ispi %lx SA state changed to " #v __VA_ARGS__, sa->ispi); \
55 format_ikev2_trace (u8 * s, va_list * args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
61 s = format (s, "ikev2: sw_if_index %d, next index %d",
62 t->sw_if_index, t->next_index);
66 #define IKEV2_GENERATE_SA_INIT_OK_str ""
67 #define IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR \
68 "no DH group configured for IKE proposals!"
69 #define IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR \
70 "DH group not supported!"
74 IKEV2_GENERATE_SA_INIT_OK,
75 IKEV2_GENERATE_SA_INIT_ERR_NO_DH,
76 IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH,
77 } ikev2_generate_sa_error_t;
80 format_ikev2_gen_sa_error (u8 * s, va_list * args)
82 ikev2_generate_sa_error_t e = va_arg (*args, ikev2_generate_sa_error_t);
85 case IKEV2_GENERATE_SA_INIT_OK:
87 case IKEV2_GENERATE_SA_INIT_ERR_NO_DH:
88 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
90 case IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH:
91 s = format (s, IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
99 IKEV2_NEXT_IP4_LOOKUP,
100 IKEV2_NEXT_IP4_ERROR_DROP,
106 IKEV2_NEXT_IP6_LOOKUP,
107 IKEV2_NEXT_IP6_ERROR_DROP,
111 typedef u32 ikev2_non_esp_marker;
114 ikev2_get_port (ikev2_sa_t *sa)
116 return ikev2_natt_active (sa) ? IKEV2_PORT_NATT : IKEV2_PORT;
120 ikev2_insert_non_esp_marker (ike_header_t *ike, int len)
122 memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len);
123 clib_memset (ike, 0, sizeof (ikev2_non_esp_marker));
124 return len + sizeof (ikev2_non_esp_marker);
127 static ikev2_sa_transform_t *
128 ikev2_find_transform_data (ikev2_sa_transform_t * t)
130 ikev2_main_t *km = &ikev2_main;
131 ikev2_sa_transform_t *td;
133 vec_foreach (td, km->supported_transforms)
135 if (td->type != t->type)
138 if (td->transform_id != t->transform_id)
141 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
143 if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
144 || t->attrs[1] != 14)
147 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
155 static ikev2_sa_proposal_t *
156 ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
157 ikev2_protocol_id_t prot_id)
159 ikev2_sa_proposal_t *rv = 0;
160 ikev2_sa_proposal_t *proposal;
161 ikev2_sa_transform_t *transform, *new_t;
162 u8 mandatory_bitmap, optional_bitmap;
164 if (prot_id == IKEV2_PROTOCOL_IKE)
166 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
167 (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH);
168 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG);
170 else if (prot_id == IKEV2_PROTOCOL_ESP)
172 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
173 (1 << IKEV2_TRANSFORM_TYPE_ESN);
174 optional_bitmap = mandatory_bitmap |
175 (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
177 else if (prot_id == IKEV2_PROTOCOL_AH)
179 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
180 (1 << IKEV2_TRANSFORM_TYPE_ESN);
181 optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
186 vec_add2 (rv, proposal, 1);
188 vec_foreach (proposal, proposals)
191 if (proposal->protocol_id != prot_id)
194 vec_foreach (transform, proposal->transforms)
196 if ((1 << transform->type) & bitmap)
199 if (ikev2_find_transform_data (transform))
201 bitmap |= 1 << transform->type;
202 vec_add2 (rv->transforms, new_t, 1);
203 clib_memcpy_fast (new_t, transform, sizeof (*new_t));
204 new_t->attrs = vec_dup (transform->attrs);
208 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
209 (bitmap & ~optional_bitmap) == 0)
211 rv->proposal_num = proposal->proposal_num;
212 rv->protocol_id = proposal->protocol_id;
213 RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
218 vec_free (rv->transforms);
227 ikev2_sa_transform_t *
228 ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
229 ikev2_transform_type_t type)
231 ikev2_sa_transform_t *t;
236 vec_foreach (t, p->transforms)
239 return ikev2_find_transform_data (t);
245 ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
249 vec_foreach (c, sa->childs)
251 ikev2_sa_proposal_t *proposal =
252 by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
253 if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
261 ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
263 ikev2_sa_proposal_t *p;
264 ikev2_sa_transform_t *t;
271 vec_foreach (t, p->transforms)
275 vec_free (p->transforms);
281 ikev2_sa_free_child_sa (ikev2_child_sa_t * c)
283 ikev2_sa_free_proposal_vector (&c->r_proposals);
284 ikev2_sa_free_proposal_vector (&c->i_proposals);
294 ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
297 vec_foreach (c, *childs) ikev2_sa_free_child_sa (c);
303 ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
305 ikev2_sa_free_child_sa (child);
306 vec_del1 (sa->childs, child - sa->childs);
310 ikev2_sa_free_all_vec (ikev2_sa_t * sa)
312 vec_free (sa->i_nonce);
313 vec_free (sa->r_nonce);
315 vec_free (sa->dh_shared_key);
316 vec_free (sa->dh_private_key);
317 vec_free (sa->i_dh_data);
318 vec_free (sa->r_dh_data);
320 ikev2_sa_free_proposal_vector (&sa->r_proposals);
321 ikev2_sa_free_proposal_vector (&sa->i_proposals);
324 vec_free (sa->sk_ai);
325 vec_free (sa->sk_ar);
326 vec_free (sa->sk_ei);
327 vec_free (sa->sk_er);
328 vec_free (sa->sk_pi);
329 vec_free (sa->sk_pr);
331 vec_free (sa->i_id.data);
332 vec_free (sa->r_id.data);
334 vec_free (sa->i_auth.data);
336 EVP_PKEY_free (sa->i_auth.key);
337 vec_free (sa->r_auth.data);
339 EVP_PKEY_free (sa->r_auth.key);
343 vec_free (sa->rekey);
345 vec_free (sa->last_sa_init_req_packet_data);
346 vec_free (sa->last_sa_init_res_packet_data);
348 vec_free (sa->last_res_packet_data);
350 ikev2_sa_free_all_child_sa (&sa->childs);
354 ikev2_delete_sa (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa)
358 ikev2_sa_free_all_vec (sa);
360 p = hash_get (ptd->sa_by_rspi, sa->rspi);
363 hash_unset (ptd->sa_by_rspi, sa->rspi);
364 pool_put (ptd->sas, sa);
368 static ikev2_generate_sa_error_t
369 ikev2_generate_sa_init_data (ikev2_sa_t * sa)
371 ikev2_sa_transform_t *t = 0, *t2;
372 ikev2_main_t *km = &ikev2_main;
374 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
375 return IKEV2_GENERATE_SA_INIT_ERR_NO_DH;
377 /* check if received DH group is on our list of supported groups */
378 vec_foreach (t2, km->supported_transforms)
380 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
389 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
390 return IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH;
393 if (sa->is_initiator)
396 RAND_bytes ((u8 *) & sa->ispi, 8);
399 sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
400 RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
405 RAND_bytes ((u8 *) & sa->rspi, 8);
408 sa->r_nonce = vec_new (u8, vec_len (sa->i_nonce));
409 RAND_bytes ((u8 *) sa->r_nonce, vec_len (sa->i_nonce));
412 /* generate dh keys */
413 ikev2_generate_dh (sa, t);
415 return IKEV2_GENERATE_SA_INIT_OK;
419 ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
421 ikev2_sa_transform_t *t = 0, *t2;
422 ikev2_main_t *km = &ikev2_main;
424 /*move some data to the new SA */
425 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
426 sa->i_nonce = _(sai->i_nonce);
427 sa->i_dh_data = _(sai->i_dh_data);
428 sa->dh_private_key = _(sai->dh_private_key);
429 ip_address_copy (&sa->iaddr, &sai->iaddr);
430 ip_address_copy (&sa->raddr, &sai->raddr);
431 sa->is_initiator = sai->is_initiator;
432 sa->i_id.type = sai->i_id.type;
433 sa->r_id.type = sai->r_id.type;
434 sa->profile_index = sai->profile_index;
435 sa->tun_itf = sai->tun_itf;
436 sa->is_tun_itf_set = sai->is_tun_itf_set;
437 if (sai->natt_state == IKEV2_NATT_DISABLED)
438 sa->natt_state = IKEV2_NATT_DISABLED;
439 sa->i_id.data = _(sai->i_id.data);
440 sa->r_id.data = _(sai->r_id.data);
441 sa->i_auth.method = sai->i_auth.method;
442 sa->i_auth.hex = sai->i_auth.hex;
443 sa->i_auth.data = _(sai->i_auth.data);
444 sa->i_auth.key = _(sai->i_auth.key);
445 sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
446 sa->last_init_msg_id = sai->last_init_msg_id;
447 sa->childs = _(sai->childs);
448 sa->udp_encap = sai->udp_encap;
449 sa->ipsec_over_udp_port = sai->ipsec_over_udp_port;
450 sa->dst_port = sai->dst_port;
451 sa->sw_if_index = sai->sw_if_index;
455 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
460 /* check if received DH group is on our list of supported groups */
461 vec_foreach (t2, km->supported_transforms)
463 if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
472 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
477 /* generate dh keys */
478 ikev2_complete_dh (sa, t);
483 ikev2_calc_keys (ikev2_sa_t * sa)
486 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
489 u16 integ_key_len = 0, salt_len = 0;
490 ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
492 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
494 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
496 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
499 integ_key_len = tr_integ->key_len;
501 salt_len = sizeof (u32);
503 vec_append (s, sa->i_nonce);
504 vec_append (s, sa->r_nonce);
505 skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
507 /* Calculate S = Ni | Nr | SPIi | SPIr */
509 vec_add2 (s, tmp, 2 * sizeof (*spi));
511 spi[0] = clib_host_to_net_u64 (sa->ispi);
512 spi[1] = clib_host_to_net_u64 (sa->rspi);
514 /* calculate PRFplus */
516 int len = tr_prf->key_trunc + /* SK_d */
517 integ_key_len * 2 + /* SK_ai, SK_ar */
518 tr_encr->key_len * 2 + /* SK_ei, SK_er */
519 tr_prf->key_len * 2 + /* SK_pi, SK_pr */
522 keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
529 sa->sk_d = vec_new (u8, tr_prf->key_trunc);
530 clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
531 pos += tr_prf->key_trunc;
536 sa->sk_ai = vec_new (u8, integ_key_len);
537 clib_memcpy_fast (sa->sk_ai, keymat + pos, integ_key_len);
538 pos += integ_key_len;
541 sa->sk_ar = vec_new (u8, integ_key_len);
542 clib_memcpy_fast (sa->sk_ar, keymat + pos, integ_key_len);
543 pos += integ_key_len;
547 sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len);
548 clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len);
549 pos += tr_encr->key_len + salt_len;
552 sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len);
553 clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len);
554 pos += tr_encr->key_len + salt_len;
557 sa->sk_pi = vec_new (u8, tr_prf->key_len);
558 clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
559 pos += tr_prf->key_len;
562 sa->sk_pr = vec_new (u8, tr_prf->key_len);
563 clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
564 pos += tr_prf->key_len;
567 sa->keys_generated = 1;
571 ikev2_calc_child_keys (ikev2_sa_t *sa, ikev2_child_sa_t *child, u8 kex)
574 u16 integ_key_len = 0;
577 ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
579 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
581 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
583 ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
586 integ_key_len = ctr_integ->key_len;
588 salt_len = sizeof (u32);
591 vec_append (s, sa->dh_shared_key);
592 vec_append (s, sa->i_nonce);
593 vec_append (s, sa->r_nonce);
594 /* calculate PRFplus */
596 int len = ctr_encr->key_len * 2 + integ_key_len * 2 + salt_len * 2;
598 keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
603 child->sk_ei = vec_new (u8, ctr_encr->key_len);
604 clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
605 pos += ctr_encr->key_len;
610 child->sk_ai = vec_new (u8, ctr_integ->key_len);
611 clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
612 pos += ctr_integ->key_len;
616 clib_memcpy (&child->salt_ei, keymat + pos, salt_len);
621 child->sk_er = vec_new (u8, ctr_encr->key_len);
622 clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
623 pos += ctr_encr->key_len;
628 child->sk_ar = vec_new (u8, integ_key_len);
629 clib_memcpy_fast (child->sk_ar, keymat + pos, integ_key_len);
630 pos += integ_key_len;
634 clib_memcpy (&child->salt_er, keymat + pos, salt_len);
644 ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, ip_address_t *ia, u16 port)
646 const u32 max_buf_size =
647 sizeof (ispi) + sizeof (rspi) + sizeof (ip6_address_t) + sizeof (u16);
648 u8 buf[max_buf_size];
649 u8 *res = vec_new (u8, 20);
651 clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi));
652 clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi));
653 clib_memcpy_fast (&buf[8 + 8], ip_addr_bytes (ia), ip_address_size (ia));
654 clib_memcpy_fast (&buf[8 + 8 + ip_address_size (ia)], &port, sizeof (port));
655 SHA1 (buf, 2 * sizeof (ispi) + sizeof (port) + ip_address_size (ia), res);
660 ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa,
663 const ike_ke_payload_header_t *ke = p;
664 u16 plen = clib_net_to_host_u16 (ke->length);
665 ASSERT (plen >= sizeof (*ke) && plen <= rlen);
666 if (sizeof (*ke) > rlen)
668 ikev2_elog_error ("KE: packet too small");
672 sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
673 vec_reset_length (ke_data[0]);
674 vec_add (ke_data[0], ke->payload, plen - sizeof (*ke));
679 ikev2_parse_nonce_payload (const void *p, u32 rlen, const u8 **nonce)
681 const ike_payload_header_t *ikep = p;
682 u16 plen = clib_net_to_host_u16 (ikep->length);
683 ASSERT (plen >= sizeof (*ikep) && plen <= rlen);
684 int len = plen - sizeof (*ikep);
685 ASSERT (len >= 16 && len <= 256);
686 if (PREDICT_FALSE (len < 16 || len > 256))
688 ikev2_elog_error ("NONCE: bad size");
691 *nonce = ikep->payload;
696 ikev2_check_payload_length (const ike_payload_header_t * ikep, int rlen,
699 if (sizeof (*ikep) > rlen)
701 ikev2_elog_error ("payload: packet too small");
704 *plen = clib_net_to_host_u16 (ikep->length);
705 if (*plen < sizeof (*ikep) || *plen > rlen)
707 ikev2_elog_error ("payload: bad size");
714 ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike,
715 udp_header_t *udp, u32 len, u32 sw_if_index)
718 u8 payload = ike->nextpayload;
719 ike_payload_header_t *ikep;
722 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received "
723 "from ", clib_net_to_host_u64 (ike->ispi),
724 clib_net_to_host_u64 (ike->rspi),
725 ip_addr_v4 (&sa->iaddr).as_u32,
726 ip_addr_version (&sa->iaddr) == AF_IP4);
728 sa->ispi = clib_net_to_host_u64 (ike->ispi);
729 sa->sw_if_index = sw_if_index;
731 /* store whole IKE payload - needed for PSK auth */
732 vec_reset_length (sa->last_sa_init_req_packet_data);
733 vec_add (sa->last_sa_init_req_packet_data, ike, len);
735 if (len < sizeof (*ike))
737 ikev2_elog_error ("IKE_INIT request too small");
741 len -= sizeof (*ike);
742 while (p < len && payload != IKEV2_PAYLOAD_NONE)
744 ikep = (ike_payload_header_t *) & ike->payload[p];
745 int current_length = len - p;
746 if (!ikev2_check_payload_length (ikep, current_length, &plen))
749 if (payload == IKEV2_PAYLOAD_SA)
751 ikev2_sa_free_proposal_vector (&sa->i_proposals);
752 sa->i_proposals = ikev2_parse_sa_payload (ikep, current_length);
754 else if (payload == IKEV2_PAYLOAD_KE)
756 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
760 else if (payload == IKEV2_PAYLOAD_NONCE)
764 vec_reset_length (sa->i_nonce);
765 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
768 vec_add (sa->i_nonce, nonce, nonce_len);
770 else if (payload == IKEV2_PAYLOAD_NOTIFY)
773 ikev2_parse_notify_payload (ikep, current_length);
774 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
776 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->iaddr,
778 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
780 if (sa->natt_state == IKEV2_NATT_ENABLED)
781 sa->natt_state = IKEV2_NATT_ACTIVE;
782 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
783 " behind NAT", sa->ispi);
787 else if (n->msg_type ==
788 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
790 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, 0, &sa->raddr,
792 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
794 if (sa->natt_state == IKEV2_NATT_ENABLED)
795 sa->natt_state = IKEV2_NATT_ACTIVE;
796 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
797 " (self) behind NAT", sa->ispi);
803 else if (payload == IKEV2_PAYLOAD_VENDOR)
805 ikev2_parse_vendor_payload (ikep);
809 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
811 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
813 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
814 sa->unsupported_cp = payload;
819 payload = ikep->nextpayload;
823 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
828 ikev2_process_sa_init_resp (vlib_main_t * vm,
829 ikev2_sa_t * sa, ike_header_t * ike,
830 udp_header_t * udp, u32 len)
833 u8 payload = ike->nextpayload;
834 ike_payload_header_t *ikep;
837 sa->ispi = clib_net_to_host_u64 (ike->ispi);
838 sa->rspi = clib_net_to_host_u64 (ike->rspi);
840 ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received "
841 "from ", sa->ispi, sa->rspi,
842 ip_addr_v4 (&sa->raddr).as_u32,
843 ip_addr_version (&sa->raddr) == AF_IP4);
845 /* store whole IKE payload - needed for PSK auth */
846 vec_reset_length (sa->last_sa_init_res_packet_data);
847 vec_add (sa->last_sa_init_res_packet_data, ike, len);
849 if (sizeof (*ike) > len)
851 ikev2_elog_error ("IKE_INIT response too small");
855 len -= sizeof (*ike);
856 while (p < len && payload != IKEV2_PAYLOAD_NONE)
858 int current_length = len - p;
859 ikep = (ike_payload_header_t *) & ike->payload[p];
860 if (!ikev2_check_payload_length (ikep, current_length, &plen))
863 if (payload == IKEV2_PAYLOAD_SA)
865 ikev2_sa_free_proposal_vector (&sa->r_proposals);
866 sa->r_proposals = ikev2_parse_sa_payload (ikep, current_length);
869 ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
871 clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
874 else if (payload == IKEV2_PAYLOAD_KE)
876 if (!ikev2_parse_ke_payload (ikep, current_length, sa,
880 else if (payload == IKEV2_PAYLOAD_NONCE)
884 vec_reset_length (sa->r_nonce);
885 if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length,
888 vec_add (sa->r_nonce, nonce, nonce_len);
890 else if (payload == IKEV2_PAYLOAD_NOTIFY)
893 ikev2_parse_notify_payload (ikep, current_length);
894 if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP)
896 u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
899 if (clib_memcmp (src_sha, n->data, vec_len (src_sha)))
901 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder"
902 " behind NAT, unsupported", sa->ispi);
906 else if (n->msg_type ==
907 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP)
909 u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, ike->rspi,
912 if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha)))
914 if (sa->natt_state == IKEV2_NATT_ENABLED)
915 sa->natt_state = IKEV2_NATT_ACTIVE;
916 ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator"
917 " (self) behind NAT", sa->ispi);
923 else if (payload == IKEV2_PAYLOAD_VENDOR)
925 ikev2_parse_vendor_payload (ikep);
929 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
931 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
933 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
934 sa->unsupported_cp = payload;
939 payload = ikep->nextpayload;
945 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike,
946 u8 * payload, u32 rlen, u32 * out_len)
948 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
950 u8 last_payload = 0, *hmac = 0, *plaintext = 0;
951 ike_payload_header_t *ikep = 0;
954 ikev2_sa_transform_t *tr_integ;
955 ikev2_sa_transform_t *tr_encr;
957 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
959 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
960 int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
962 if (((!sa->sk_ar || !sa->sk_ai) && !is_aead) || (!sa->sk_ei || !sa->sk_er))
965 if (rlen <= sizeof (*ike))
968 int len = rlen - sizeof (*ike);
970 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
972 ikep = (ike_payload_header_t *) & ike->payload[p];
973 int current_length = len - p;
974 if (!ikev2_check_payload_length (ikep, current_length, &plen))
977 if (*payload == IKEV2_PAYLOAD_SK)
979 last_payload = *payload;
983 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
985 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
987 sa->unsupported_cp = *payload;
992 *payload = ikep->nextpayload;
996 if (last_payload != IKEV2_PAYLOAD_SK)
998 ikev2_elog_error ("Last payload must be SK");
1004 if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE)
1007 plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE;
1008 u8 *aad = (u8 *) ike;
1009 u32 aad_len = ikep->payload - aad;
1010 u8 *tag = ikep->payload + plen;
1012 int rc = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload,
1013 plen, aad, aad_len, tag, &dlen);
1017 plaintext = ikep->payload + IKEV2_GCM_IV_SIZE;
1022 if (rlen < tr_integ->key_trunc)
1026 ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
1027 (u8 *) ike, rlen - tr_integ->key_trunc);
1029 if (plen < sizeof (*ikep) + tr_integ->key_trunc)
1032 plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
1034 if (clib_memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
1036 ikev2_elog_error ("message integrity check failed");
1042 int rc = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen,
1047 plaintext = ikep->payload + tr_encr->block_size;
1055 ikev2_is_id_equal (const ikev2_id_t *i1, const ikev2_id_t *i2)
1057 if (i1->type != i2->type)
1060 if (vec_len (i1->data) != vec_len (i2->data))
1063 if (clib_memcmp (i1->data, i2->data, vec_len (i1->data)))
1070 ikev2_initial_contact_cleanup_internal (ikev2_main_per_thread_data_t * ptd,
1073 ikev2_main_t *km = &ikev2_main;
1076 ikev2_child_sa_t *c;
1078 /* find old IKE SAs with the same authenticated identity */
1080 pool_foreach (tmp, ptd->sas) {
1081 if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id)
1082 || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id))
1085 if (sa->rspi != tmp->rspi)
1086 vec_add1(delete, tmp - ptd->sas);
1090 for (i = 0; i < vec_len (delete); i++)
1092 tmp = pool_elt_at_index (ptd->sas, delete[i]);
1093 vec_foreach (c, tmp->childs)
1095 ikev2_delete_tunnel_interface (km->vnet_main, tmp, c);
1097 ikev2_delete_sa (ptd, tmp);
1101 sa->initial_contact = 0;
1105 ikev2_initial_contact_cleanup (ikev2_main_per_thread_data_t * ptd,
1108 ikev2_main_t *km = &ikev2_main;
1110 if (!sa->initial_contact)
1115 ikev2_initial_contact_cleanup_internal (ptd, sa);
1119 vec_foreach (ptd, km->per_thread_data)
1120 ikev2_initial_contact_cleanup_internal (ptd, sa);
1122 sa->initial_contact = 0;
1126 ikev2_parse_id_payload (const void *p, u16 rlen, ikev2_id_t * sa_id)
1128 const ike_id_payload_header_t *id = p;
1129 u16 plen = clib_net_to_host_u16 (id->length);
1130 if (plen < sizeof (*id) || plen > rlen)
1133 sa_id->type = id->id_type;
1134 vec_reset_length (sa_id->data);
1135 vec_add (sa_id->data, id->payload, plen - sizeof (*id));
1141 ikev2_parse_auth_payload (const void *p, u32 rlen, ikev2_auth_t * a)
1143 const ike_auth_payload_header_t *ah = p;
1144 u16 plen = clib_net_to_host_u16 (ah->length);
1146 a->method = ah->auth_method;
1147 vec_reset_length (a->data);
1148 vec_add (a->data, ah->payload, plen - sizeof (*ah));
1153 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa,
1154 ike_header_t * ike, u32 len)
1157 ikev2_child_sa_t *first_child_sa;
1158 u8 payload = ike->nextpayload;
1160 ike_payload_header_t *ikep;
1164 ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received "
1165 "from ", clib_host_to_net_u64 (ike->ispi),
1166 clib_host_to_net_u64 (ike->rspi),
1168 ip_addr_v4 (&sa->raddr).as_u32 :
1169 ip_addr_v4 (&sa->iaddr).as_u32,
1170 ip_addr_version (&sa->raddr) == AF_IP4);
1172 ikev2_calc_keys (sa);
1174 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1178 if (sa->unsupported_cp)
1180 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1186 /* select or create 1st child SA */
1187 if (sa->is_initiator)
1189 first_child_sa = &sa->childs[0];
1193 ikev2_sa_free_all_child_sa (&sa->childs);
1194 vec_add2 (sa->childs, first_child_sa, 1);
1198 /* process encrypted payload */
1199 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1201 ikep = (ike_payload_header_t *) & plaintext[p];
1202 int current_length = dlen - p;
1203 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1206 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
1208 if (sa->is_initiator)
1210 ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
1211 first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep,
1216 ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
1217 first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep,
1221 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
1223 if (!ikev2_parse_id_payload (ikep, current_length, &sa->i_id))
1226 else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
1228 if (!ikev2_parse_id_payload (ikep, current_length, &sa->r_id))
1231 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
1233 if (sa->is_initiator)
1235 if (!ikev2_parse_auth_payload (ikep, current_length,
1241 if (!ikev2_parse_auth_payload (ikep, current_length,
1246 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1249 ikev2_parse_notify_payload (ikep, current_length);
1250 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
1252 sa->initial_contact = 1;
1256 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1258 ikev2_parse_vendor_payload (ikep);
1260 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
1262 vec_free (first_child_sa->tsi);
1263 first_child_sa->tsi = ikev2_parse_ts_payload (ikep, current_length);
1265 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
1267 vec_free (first_child_sa->tsr);
1268 first_child_sa->tsr = ikev2_parse_ts_payload (ikep, current_length);
1272 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1275 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1277 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1278 sa->unsupported_cp = payload;
1283 payload = ikep->nextpayload;
1290 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": malformed IKE_AUTH");
1295 ikev2_process_informational_req (vlib_main_t * vm,
1296 ikev2_sa_t * sa, ike_header_t * ike, u32 len)
1299 u8 payload = ike->nextpayload;
1301 ike_payload_header_t *ikep;
1303 ikev2_notify_t *n = 0;
1305 sa->liveness_retries = 0;
1306 ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received "
1307 "from ", clib_host_to_net_u64 (ike->ispi),
1308 clib_host_to_net_u64 (ike->rspi),
1309 ip_addr_v4 (&sa->iaddr).as_u32,
1310 ip_addr_version (&sa->iaddr) == AF_IP4);
1312 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1317 /* process encrypted payload */
1319 while (p < dlen && payload != IKEV2_PAYLOAD_NONE)
1321 u32 current_length = dlen - p;
1322 if (p + sizeof (*ikep) > dlen)
1325 ikep = (ike_payload_header_t *) & plaintext[p];
1326 u16 plen = clib_net_to_host_u16 (ikep->length);
1328 if (plen < sizeof (*ikep) || plen > current_length)
1331 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1333 n = ikev2_parse_notify_payload (ikep, current_length);
1336 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1337 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1340 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1342 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1344 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1346 ikev2_parse_vendor_payload (ikep);
1350 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1352 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1354 sa->unsupported_cp = payload;
1358 payload = ikep->nextpayload;
1365 ikev2_process_create_child_sa_rekey (ikev2_sa_t *sa, ikev2_sa_t *sar,
1366 ikev2_rekey_t *rekey,
1367 ikev2_sa_proposal_t *proposal,
1368 ikev2_ts_t *tsi, ikev2_ts_t *tsr,
1369 const u8 *nonce, int nonce_len)
1371 ikev2_sa_transform_t *tr;
1373 rekey->i_proposal = proposal;
1374 rekey->r_proposal = ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1379 ikev2_sa_get_td_for_type (rekey->r_proposal, IKEV2_TRANSFORM_TYPE_DH);
1381 if (!tr || tr->dh_type != sar->dh_group)
1383 rekey->notify_type = IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD;
1384 ikev2_sa_free_proposal_vector (&rekey->r_proposal);
1388 vec_free (sa->dh_shared_key);
1389 vec_free (sa->dh_private_key);
1390 vec_free (sa->i_dh_data);
1391 vec_free (sa->r_dh_data);
1393 sa->dh_group = sar->dh_group;
1394 sa->i_dh_data = sar->i_dh_data;
1397 ikev2_generate_dh (sa, tr);
1401 vec_reset_length (sa->i_nonce);
1402 vec_add (sa->i_nonce, nonce, nonce_len);
1404 vec_validate (sa->r_nonce, nonce_len - 1);
1405 RAND_bytes ((u8 *) sa->r_nonce, nonce_len);
1414 ikev2_process_create_child_sa_req (vlib_main_t * vm,
1415 ikev2_sa_t * sa, ike_header_t * ike,
1419 u8 payload = ike->nextpayload;
1421 ikev2_rekey_t *rekey;
1422 ike_payload_header_t *ikep;
1423 ikev2_notify_t *n = 0;
1424 ikev2_ts_t *tsi = 0;
1425 ikev2_ts_t *tsr = 0;
1426 ikev2_sa_proposal_t *proposal = 0;
1427 ikev2_child_sa_t *child_sa;
1430 const u8 *nonce = 0;
1434 clib_memset (&sar, 0, sizeof (sar));
1436 if (sa->is_initiator)
1437 src = ip_addr_v4 (&sa->raddr).as_u32;
1439 src = ip_addr_v4 (&sa->iaddr).as_u32;
1441 ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received from",
1442 clib_host_to_net_u64 (ike->ispi),
1443 clib_host_to_net_u64 (ike->rspi), src,
1444 ip_addr_version (&sa->raddr) == AF_IP4);
1446 plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload, len, &dlen);
1449 goto cleanup_and_exit;
1451 /* process encrypted payload */
1453 while (payload != IKEV2_PAYLOAD_NONE)
1455 ikep = (ike_payload_header_t *) & plaintext[p];
1456 int current_length = dlen - p;
1457 if (!ikev2_check_payload_length (ikep, current_length, &plen))
1458 goto cleanup_and_exit;
1460 if (payload == IKEV2_PAYLOAD_SA)
1462 proposal = ikev2_parse_sa_payload (ikep, current_length);
1464 else if (payload == IKEV2_PAYLOAD_KE)
1466 if (!ikev2_parse_ke_payload (ikep, current_length, &sar,
1468 goto cleanup_and_exit;
1470 else if (payload == IKEV2_PAYLOAD_NOTIFY)
1473 n0 = ikev2_parse_notify_payload (ikep, current_length);
1474 if (n0->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1482 else if (payload == IKEV2_PAYLOAD_DELETE)
1484 sa->del = ikev2_parse_delete_payload (ikep, current_length);
1486 else if (payload == IKEV2_PAYLOAD_VENDOR)
1488 ikev2_parse_vendor_payload (ikep);
1490 else if (payload == IKEV2_PAYLOAD_NONCE)
1492 nonce_len = ikev2_parse_nonce_payload (ikep, current_length, &nonce);
1494 goto cleanup_and_exit;
1496 else if (payload == IKEV2_PAYLOAD_TSI)
1498 tsi = ikev2_parse_ts_payload (ikep, current_length);
1500 else if (payload == IKEV2_PAYLOAD_TSR)
1502 tsr = ikev2_parse_ts_payload (ikep, current_length);
1506 ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d",
1508 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1510 sa->unsupported_cp = payload;
1511 goto cleanup_and_exit;
1514 payload = ikep->nextpayload;
1518 if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP || !nonce)
1519 goto cleanup_and_exit;
1521 if (sa->is_initiator)
1524 if (vec_len (rekey) == 0)
1525 goto cleanup_and_exit;
1526 rekey->notify_type = 0;
1527 rekey->protocol_id = proposal->protocol_id;
1529 ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
1530 rekey->i_proposal->spi = rekey->spi;
1531 rekey->r_proposal = proposal;
1535 vec_reset_length (sa->r_nonce);
1536 vec_add (sa->r_nonce, nonce, nonce_len);
1537 child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1540 child_sa->rekey_retries = 0;
1547 child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1550 ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found",
1552 goto cleanup_and_exit;
1554 vec_add2 (sa->rekey, rekey, 1);
1555 rekey->notify_type = 0;
1557 rekey->protocol_id = n->protocol_id;
1558 rekey->spi = n->spi;
1559 if (sa->old_remote_id_present)
1561 rekey->notify_type = IKEV2_NOTIFY_MSG_TEMPORARY_FAILURE;
1562 vec_free (proposal);
1566 else if (!ikev2_process_create_child_sa_rekey (
1567 sa, &sar, rekey, proposal, tsi, tsr, nonce, nonce_len))
1569 vec_free (proposal);
1576 /* create new child SA */
1577 vec_add2 (sa->new_child, rekey, 1);
1578 rekey->notify_type = 0;
1580 if (!ikev2_process_create_child_sa_rekey (
1581 sa, &sar, rekey, proposal, tsi, tsr, nonce, nonce_len))
1583 vec_free (proposal);
1590 ikev2_sa_free_all_vec (&sar);
1595 vec_free (proposal);
1598 ikev2_sa_free_all_vec (&sar);
1603 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1611 ikev2_sa_transform_t *tr_prf;
1614 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1620 nonce = sa->i_nonce;
1621 packet_data = sa->last_sa_init_res_packet_data;
1627 nonce = sa->r_nonce;
1628 packet_data = sa->last_sa_init_req_packet_data;
1631 data = vec_new (u8, 4);
1633 vec_append (data, id->data);
1635 u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1636 vec_append (authmsg, packet_data);
1637 vec_append (authmsg, nonce);
1638 vec_append (authmsg, id_hash);
1646 ikev2_match_profile (const ikev2_profile_t *p, const ikev2_id_t *id_loc,
1647 const ikev2_id_t *id_rem, int is_initiator)
1649 /* on the initiator, IDi is always present and must match
1650 * however on the responder, IDr (which is our local id) is optional */
1651 if ((is_initiator || id_loc->type != 0) &&
1652 !ikev2_is_id_equal (&p->loc_id, id_loc))
1655 /* on the initiator, we might not have configured a specific remote id
1656 * however on the responder, the remote id should always be configured */
1657 if ((!is_initiator || p->rem_id.type != 0) &&
1658 !ikev2_is_id_equal (&p->rem_id, id_rem))
1665 ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
1667 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1668 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1669 !ip_address_cmp (&ts1->start_addr, &ts2->start_addr) &&
1670 !ip_address_cmp (&ts1->end_addr, &ts2->end_addr))
1677 ikev2_sa_match_ts (ikev2_sa_t * sa)
1679 ikev2_main_t *km = &ikev2_main;
1681 ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1682 ikev2_id_t *id_rem, *id_loc;
1685 pool_foreach (p, km->profiles) {
1687 if (sa->is_initiator)
1702 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1705 sa->profile_index = p - km->profiles;
1707 vec_foreach(ts, sa->childs[0].tsi)
1709 if (ikev2_ts_cmp(p_tsi, ts))
1711 vec_add1 (tsi, ts[0]);
1716 vec_foreach(ts, sa->childs[0].tsr)
1718 if (ikev2_ts_cmp(p_tsr, ts))
1720 vec_add1 (tsr, ts[0]);
1731 vec_free (sa->childs[0].tsi);
1732 vec_free (sa->childs[0].tsr);
1733 sa->childs[0].tsi = tsi;
1734 sa->childs[0].tsr = tsr;
1740 ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
1744 static ikev2_profile_t *
1745 ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa,
1746 ikev2_sa_transform_t *tr_prf, u8 *key_pad)
1748 ikev2_profile_t *ret = 0, *p;
1749 ikev2_id_t *id_rem, *id_loc;
1750 ikev2_auth_t *sa_auth;
1751 u8 *authmsg, *psk = 0, *auth = 0;
1753 authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1755 if (sa->is_initiator)
1759 sa_auth = &sa->r_auth;
1765 sa_auth = &sa->i_auth;
1768 pool_foreach (p, km->profiles)
1770 if (!ikev2_match_profile (p, id_loc, id_rem, sa->is_initiator))
1773 if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1775 if (!p->auth.data ||
1776 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1779 psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad);
1780 auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1782 if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data)))
1784 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1791 ikev2_elog_uint (IKEV2_LOG_ERROR,
1792 "shared key mismatch! ispi %lx", sa->ispi);
1795 else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1797 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1800 if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1)
1802 ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED);
1808 ikev2_elog_uint (IKEV2_LOG_ERROR,
1809 "cert verification failed! ispi %lx", sa->ispi);
1818 ikev2_sa_auth (ikev2_sa_t *sa)
1820 ikev2_main_t *km = &ikev2_main;
1821 ikev2_profile_t *sel_p = 0;
1822 ikev2_sa_transform_t *tr_prf;
1823 u8 *psk, *authmsg, *key_pad;
1826 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1828 /* only shared key and rsa signature */
1829 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1830 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1832 ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u",
1834 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1838 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1839 sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad);
1843 ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED);
1844 sa->udp_encap = sel_p->udp_encap;
1845 sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port;
1847 if (!sa->is_initiator)
1849 vec_free (sa->r_id.data);
1850 sa->r_id.data = vec_dup (sel_p->loc_id.data);
1851 sa->r_id.type = sel_p->loc_id.type;
1852 sa->i_id.data = vec_dup (sel_p->rem_id.data);
1853 sa->i_id.type = sel_p->rem_id.type;
1855 /* generate our auth data */
1856 authmsg = ikev2_sa_generate_authmsg (sa, 1);
1857 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1859 vec_free (sa->r_auth.data);
1860 psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad);
1861 sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1862 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1865 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1867 vec_free (sa->r_auth.data);
1868 sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1869 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1873 /* select transforms for 1st child sa */
1874 ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1875 sa->childs[0].r_proposals =
1876 ikev2_select_proposal (sa->childs[0].i_proposals,
1877 IKEV2_PROTOCOL_ESP);
1879 if (~0 != sel_p->tun_itf)
1881 sa->is_tun_itf_set = 1;
1882 sa->tun_itf = sel_p->tun_itf;
1888 ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching "
1889 "profile found! ispi %lx", sa->ispi);
1890 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1896 ikev2_sa_auth_init (ikev2_sa_t * sa)
1898 ikev2_main_t *km = &ikev2_main;
1899 u8 *authmsg, *key_pad, *psk = 0;
1900 ikev2_sa_transform_t *tr_prf;
1903 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1905 /* only shared key and rsa signature */
1906 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1907 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1909 ikev2_elog_uint (IKEV2_LOG_ERROR,
1910 "unsupported authentication method %u",
1912 ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
1916 authmsg = ikev2_sa_generate_authmsg (sa, 0);
1918 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1920 key_pad = format (0, "%s", IKEV2_KEY_PAD);
1921 psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1922 vec_free (sa->i_auth.data);
1923 sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1924 sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1928 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1930 vec_free (sa->i_auth.data);
1931 sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1932 sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1938 ikev2_mk_local_sa_id (u32 sai, u32 ci, u32 ti)
1940 return (0x80000000 | (ti << 24) | (sai << 12) | ci);
1944 ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti)
1946 return (0xc0000000 | (ti << 24) | (sai << 12) | ci);
1956 ipsec_sa_flags_t flags;
1959 ipsec_crypto_alg_t encr_type;
1960 ipsec_integ_alg_t integ_type;
1961 ip_address_t local_ip;
1962 ip_address_t remote_ip;
1963 ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey;
1965 u32 old_remote_sa_id;
1966 u16 ipsec_over_udp_port;
1969 } ikev2_add_ipsec_tunnel_args_t;
1972 ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a)
1974 ikev2_main_t *km = &ikev2_main;
1978 .t_flags = TUNNEL_FLAG_NONE,
1979 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1981 .t_mode = TUNNEL_MODE_P2P,
1984 .t_src = a->remote_ip,
1985 .t_dst = a->local_ip,
1987 tunnel_t tun_out = {
1988 .t_flags = TUNNEL_FLAG_NONE,
1989 .t_encap_decap_flags = TUNNEL_ENCAP_DECAP_FLAG_NONE,
1991 .t_mode = TUNNEL_MODE_P2P,
1994 .t_src = a->local_ip,
1995 .t_dst = a->remote_ip,
1998 if (~0 == a->sw_if_index)
2000 /* no tunnel associated with the SA/profile - create a new one */
2001 rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, &ip_addr_46 (&a->local_ip),
2002 &ip_addr_46 (&a->remote_ip), 0,
2003 TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0,
2004 TUNNEL_MODE_P2P, &sw_if_index);
2006 if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS)
2008 if (hash_get (km->sw_if_indices, sw_if_index))
2009 /* interface is managed by IKE; proceed with updating SAs */
2012 hash_set1 (km->sw_if_indices, sw_if_index);
2016 sw_if_index = a->sw_if_index;
2017 vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index);
2022 ikev2_elog_uint (IKEV2_LOG_ERROR,
2023 "installing ipip tunnel failed! local spi: %x",
2029 vec_add1 (sas_in, a->remote_sa_id);
2032 ipsec_tun_protect_del (sw_if_index, NULL);
2034 /* replace local SA immediately */
2035 ipsec_sa_unlock_id (a->local_sa_id);
2037 /* keep the old sa */
2038 vec_add1 (sas_in, a->old_remote_sa_id);
2041 rv = ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP,
2042 a->encr_type, &a->loc_ckey, a->integ_type,
2043 &a->loc_ikey, a->flags, a->salt_local,
2044 a->src_port, a->dst_port, &tun_out, NULL);
2048 rv = ipsec_sa_add_and_lock (
2049 a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type,
2050 &a->rem_ckey, a->integ_type, &a->rem_ikey,
2051 (a->flags | IPSEC_SA_FLAG_IS_INBOUND), a->salt_remote,
2052 a->ipsec_over_udp_port, a->ipsec_over_udp_port, &tun_in, NULL);
2056 rv = ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in);
2063 ipsec_sa_unlock_id (a->remote_sa_id);
2065 ipsec_sa_unlock_id (a->local_sa_id);
2071 ikev2_create_tunnel_interface (vlib_main_t *vm, ikev2_sa_t *sa,
2072 ikev2_child_sa_t *child, u32 sa_index,
2073 u32 child_index, u8 is_rekey, u8 kex)
2075 u32 thread_index = vlib_get_thread_index ();
2076 ikev2_main_t *km = &ikev2_main;
2077 ipsec_crypto_alg_t encr_type;
2078 ipsec_integ_alg_t integ_type;
2079 ikev2_profile_t *p = 0;
2080 ikev2_sa_transform_t *tr;
2081 ikev2_sa_proposal_t *proposals;
2083 ikev2_add_ipsec_tunnel_args_t a;
2085 clib_memset (&a, 0, sizeof (a));
2087 if (!child->r_proposals)
2089 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2093 if (sa->is_initiator)
2095 ip_address_copy (&a.local_ip, &sa->iaddr);
2096 ip_address_copy (&a.remote_ip, &sa->raddr);
2097 proposals = child->r_proposals;
2098 a.local_spi = child->r_proposals[0].spi;
2099 a.remote_spi = child->i_proposals[0].spi;
2103 ip_address_copy (&a.local_ip, &sa->raddr);
2104 ip_address_copy (&a.remote_ip, &sa->iaddr);
2105 proposals = child->i_proposals;
2106 a.local_spi = child->i_proposals[0].spi;
2107 a.remote_spi = child->r_proposals[0].spi;
2110 a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY;
2113 a.flags |= IPSEC_SA_FLAG_IS_TUNNEL;
2114 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2116 if (ikev2_natt_active (sa))
2117 a.flags |= IPSEC_SA_FLAG_UDP_ENCAP;
2118 a.is_rekey = is_rekey;
2120 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
2121 if (tr && tr->esn_type)
2122 a.flags |= IPSEC_SA_FLAG_USE_ESN;
2124 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2127 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
2129 switch (tr->key_len)
2132 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
2135 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
2138 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
2141 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2146 else if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16
2149 switch (tr->key_len)
2152 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_128;
2155 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_192;
2158 encr_type = IPSEC_CRYPTO_ALG_AES_GCM_256;
2161 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2169 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2175 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2178 a.encr_type = encr_type;
2182 tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2185 switch (tr->integ_type)
2187 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
2188 integ_type = IPSEC_INTEG_ALG_SHA_256_128;
2190 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
2191 integ_type = IPSEC_INTEG_ALG_SHA_384_192;
2193 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
2194 integ_type = IPSEC_INTEG_ALG_SHA_512_256;
2196 case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
2197 integ_type = IPSEC_INTEG_ALG_SHA1_96;
2200 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2206 ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
2212 integ_type = IPSEC_INTEG_ALG_NONE;
2215 a.integ_type = integ_type;
2216 ikev2_calc_child_keys (sa, child, kex);
2218 if (sa->is_initiator)
2220 ipsec_mk_key (&a.loc_ikey, child->sk_ai, vec_len (child->sk_ai));
2221 ipsec_mk_key (&a.rem_ikey, child->sk_ar, vec_len (child->sk_ar));
2222 ipsec_mk_key (&a.loc_ckey, child->sk_ei, vec_len (child->sk_ei));
2223 ipsec_mk_key (&a.rem_ckey, child->sk_er, vec_len (child->sk_er));
2226 a.salt_remote = child->salt_er;
2227 a.salt_local = child->salt_ei;
2229 a.dst_port = a.src_port = sa->ipsec_over_udp_port;
2233 ipsec_mk_key (&a.loc_ikey, child->sk_ar, vec_len (child->sk_ar));
2234 ipsec_mk_key (&a.rem_ikey, child->sk_ai, vec_len (child->sk_ai));
2235 ipsec_mk_key (&a.loc_ckey, child->sk_er, vec_len (child->sk_er));
2236 ipsec_mk_key (&a.rem_ckey, child->sk_ei, vec_len (child->sk_ei));
2239 a.salt_remote = child->salt_ei;
2240 a.salt_local = child->salt_er;
2243 ikev2_natt_active (sa) ? sa->dst_port : sa->ipsec_over_udp_port;
2244 a.src_port = sa->ipsec_over_udp_port;
2247 if (sa->is_initiator && sa->profile_index != ~0)
2248 p = pool_elt_at_index (km->profiles, sa->profile_index);
2250 if (p && p->lifetime)
2252 child->time_to_expiration = vlib_time_now (vm) + p->lifetime;
2253 if (p->lifetime_jitter)
2255 // This is not much better than rand(3), which Coverity warns
2256 // is unsuitable for security applications; random_u32 is
2257 // however fast. If this perturbance to the expiration time
2258 // needs to use a better RNG then we may need to use something
2259 // like /dev/urandom which has significant overhead.
2260 u32 rnd = (u32) (vlib_time_now (vm) * 1e6);
2261 rnd = random_u32 (&rnd);
2263 child->time_to_expiration += 1 + (rnd % p->lifetime_jitter);
2267 if (thread_index & 0xffffffc0)
2268 ikev2_elog_error ("error: thread index exceeds max range 0x3f!");
2270 if (child_index & 0xfffff000 || sa_index & 0xfffff000)
2271 ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!");
2273 child->local_sa_id =
2275 ikev2_mk_local_sa_id (sa_index, child_index, thread_index);
2277 u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index,
2282 /* create a new remote SA ID to keep the old SA for a bit longer
2283 * so the peer has some time to swap their SAs */
2285 /* use most significat bit of child index part in id */
2287 if (sa->current_remote_id_mask)
2289 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask;
2290 sa->current_remote_id_mask = 0;
2294 sa->old_remote_id = a.old_remote_sa_id = remote_sa_id;
2295 sa->current_remote_id_mask = mask;
2296 remote_sa_id |= mask;
2298 sa->old_id_expiration = 3.0;
2299 sa->old_remote_id_present = 1;
2302 child->remote_sa_id = a.remote_sa_id = remote_sa_id;
2304 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2305 a.ipsec_over_udp_port = sa->ipsec_over_udp_port;
2307 vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main,
2308 (u8 *) & a, sizeof (a));
2314 ip46_address_t local_ip;
2315 ip46_address_t remote_ip;
2319 } ikev2_del_ipsec_tunnel_args_t;
2322 ikev2_flip_alternate_sa_bit (u32 id)
2331 ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a)
2333 ikev2_main_t *km = &ikev2_main;
2334 ipip_tunnel_t *ipip = NULL;
2337 if (~0 == a->sw_if_index)
2340 ipip_tunnel_key_t key = {
2342 .dst = a->remote_ip,
2343 .transport = IPIP_TRANSPORT_IP4,
2348 ipip = ipip_tunnel_db_find (&key);
2352 sw_if_index = ipip->sw_if_index;
2353 hash_unset (km->sw_if_indices, ipip->sw_if_index);
2360 sw_if_index = a->sw_if_index;
2361 vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index);
2364 if (~0 != sw_if_index)
2365 ipsec_tun_protect_del (sw_if_index, NULL);
2367 ipsec_sa_unlock_id (a->remote_sa_id);
2368 ipsec_sa_unlock_id (a->local_sa_id);
2369 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id));
2372 ipip_del_tunnel (ipip->sw_if_index);
2376 ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
2377 ikev2_child_sa_t * child)
2379 ikev2_del_ipsec_tunnel_args_t a;
2381 clib_memset (&a, 0, sizeof (a));
2383 if (sa->is_initiator)
2385 ip_address_to_46 (&sa->iaddr, &a.local_ip);
2386 ip_address_to_46 (&sa->raddr, &a.remote_ip);
2390 ip_address_to_46 (&sa->raddr, &a.local_ip);
2391 ip_address_to_46 (&sa->iaddr, &a.remote_ip);
2394 a.remote_sa_id = child->remote_sa_id;
2395 a.local_sa_id = child->local_sa_id;
2396 a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0);
2398 vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a,
2404 ikev2_add_invalid_ke_payload (ikev2_sa_t *sa, ikev2_payload_chain_t *chain)
2406 u8 *data = vec_new (u8, 2);
2407 ikev2_sa_transform_t *tr_dh =
2408 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_DH);
2409 ASSERT (tr_dh && tr_dh->dh_type);
2410 data[0] = (tr_dh->dh_type >> 8) & 0xff;
2411 data[1] = (tr_dh->dh_type) & 0xff;
2412 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD, data);
2417 ikev2_add_create_child_resp (ikev2_sa_t *sa, ikev2_rekey_t *rekey,
2418 ikev2_payload_chain_t *chain)
2420 if (rekey->notify_type)
2422 if (rekey->notify_type == IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD)
2423 ikev2_add_invalid_ke_payload (sa, chain);
2425 ikev2_payload_add_notify (chain, rekey->notify_type, 0);
2429 ikev2_payload_add_sa (chain, rekey->r_proposal);
2430 ikev2_payload_add_nonce (chain, sa->r_nonce);
2432 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2433 ikev2_payload_add_ts (chain, rekey->tsi, IKEV2_PAYLOAD_TSI);
2434 ikev2_payload_add_ts (chain, rekey->tsr, IKEV2_PAYLOAD_TSR);
2438 ikev2_generate_message (vlib_buffer_t *b, ikev2_sa_t *sa, ike_header_t *ike,
2439 void *user, udp_header_t *udp, ikev2_stats_t *stats)
2441 ikev2_main_t *km = &ikev2_main;
2442 u16 buffer_data_size = vlib_buffer_get_default_data_size (km->vlib_main);
2444 ike_payload_header_t *ph;
2448 ikev2_sa_transform_t *tr_encr, *tr_integ;
2450 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
2452 ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
2454 ikev2_payload_chain_t *chain = 0;
2455 ikev2_payload_new_chain (chain);
2457 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2459 if (sa->r_proposals == 0)
2461 ikev2_payload_add_notify (chain,
2462 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2463 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2465 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
2467 ikev2_add_invalid_ke_payload (sa, chain);
2468 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2470 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2472 u8 *data = vec_new (u8, 1);
2474 data[0] = sa->unsupported_cp;
2475 ikev2_payload_add_notify (chain,
2476 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2484 ike->rspi = clib_host_to_net_u64 (sa->rspi);
2485 ikev2_payload_add_sa (chain, sa->r_proposals);
2486 ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
2487 ikev2_payload_add_nonce (chain, sa->r_nonce);
2489 u8 *nat_detection_sha1 =
2490 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2491 clib_host_to_net_u64 (sa->rspi),
2492 &sa->raddr, udp->dst_port);
2493 ikev2_payload_add_notify (chain,
2494 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2495 nat_detection_sha1);
2496 vec_free (nat_detection_sha1);
2497 nat_detection_sha1 =
2498 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
2499 clib_host_to_net_u64 (sa->rspi),
2500 &sa->iaddr, udp->src_port);
2501 ikev2_payload_add_notify (chain,
2502 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2503 nat_detection_sha1);
2504 vec_free (nat_detection_sha1);
2507 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2509 if (sa->state == IKEV2_STATE_AUTHENTICATED)
2511 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2512 ikev2_payload_add_auth (chain, &sa->r_auth);
2513 ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
2514 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2515 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2517 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2519 ikev2_payload_add_notify (chain,
2520 IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
2522 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2524 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
2526 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
2528 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2529 ikev2_payload_add_auth (chain, &sa->r_auth);
2531 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
2533 ikev2_payload_add_notify (chain,
2534 IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
2535 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2536 ikev2_payload_add_auth (chain, &sa->r_auth);
2537 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2538 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2540 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
2542 u8 *data = vec_new (u8, 1);
2544 data[0] = sa->unsupported_cp;
2545 ikev2_payload_add_notify (chain,
2546 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2550 else if (sa->state == IKEV2_STATE_SA_INIT)
2552 ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
2553 /* IDr is optional when sending INIT from the initiator */
2554 ASSERT (sa->r_id.type != 0 || sa->is_initiator);
2555 if (sa->r_id.type != 0)
2556 ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
2557 ikev2_payload_add_auth (chain, &sa->i_auth);
2558 ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
2559 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2560 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2561 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT,
2566 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": unexpected IKE_AUTH");
2570 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2572 /* if pending delete */
2575 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
2577 if (ike_hdr_is_request (ike))
2578 ikev2_payload_add_delete (chain, sa->del);
2580 /* The response to a request that deletes the IKE SA is an empty
2581 INFORMATIONAL response. */
2582 ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
2584 /* The response to a request that deletes ESP or AH SAs will contain
2585 delete payloads for the paired SAs going in the other direction. */
2588 ikev2_payload_add_delete (chain, sa->del);
2593 /* received N(AUTHENTICATION_FAILED) */
2594 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
2596 ikev2_set_state (sa, IKEV2_STATE_DELETED, ": auth failed");
2599 /* received unsupported critical payload */
2600 else if (sa->unsupported_cp)
2602 u8 *data = vec_new (u8, 1);
2604 data[0] = sa->unsupported_cp;
2605 ikev2_payload_add_notify (chain,
2606 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
2609 sa->unsupported_cp = 0;
2612 /* else send empty response */
2614 if (ike_hdr_is_response (ike))
2616 ASSERT (stats != 0);
2617 stats->n_keepalives++;
2618 sa->stats.n_keepalives++;
2622 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2624 if (sa->is_initiator)
2627 ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
2628 ikev2_notify_t notify;
2629 u8 *data = vec_new (u8, 4);
2630 clib_memset (¬ify, 0, sizeof (notify));
2631 notify.protocol_id = IKEV2_PROTOCOL_ESP;
2632 notify.spi = sa->childs[0].i_proposals->spi;
2633 *(u32 *) data = clib_host_to_net_u32 (notify.spi);
2635 ikev2_payload_add_sa (chain, proposals);
2636 ikev2_payload_add_nonce (chain, sa->i_nonce);
2637 ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
2638 ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
2639 ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
2644 else if (vec_len (sa->rekey) > 0)
2646 ikev2_add_create_child_resp (sa, &sa->rekey[0], chain);
2647 vec_del1 (sa->rekey, 0);
2649 else if (vec_len (sa->new_child) > 0)
2651 ikev2_add_create_child_resp (sa, &sa->new_child[0], chain);
2652 vec_del1 (sa->new_child, 0);
2654 else if (sa->unsupported_cp)
2656 u8 *data = vec_new (u8, 1);
2658 data[0] = sa->unsupported_cp;
2659 ikev2_payload_add_notify (
2660 chain, IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, data);
2662 sa->unsupported_cp = 0;
2666 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
2672 ike->version = IKE_VERSION_2;
2673 ike->nextpayload = IKEV2_PAYLOAD_SK;
2674 tlen = sizeof (*ike);
2676 if (sa->is_initiator)
2677 ike->flags |= IKEV2_HDR_FLAG_INITIATOR;
2679 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
2681 tlen += vec_len (chain->data);
2682 ike->nextpayload = chain->first_payload_type;
2683 ike->length = clib_host_to_net_u32 (tlen);
2685 if (tlen + b->current_length + b->current_data > buffer_data_size)
2691 clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
2693 /* store whole IKE payload - needed for PSK auth */
2694 vec_reset_length (sa->last_sa_init_res_packet_data);
2695 vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
2699 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2700 ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
2703 plen = sizeof (*ph);
2704 ph = (ike_payload_header_t *) & ike->payload[0];
2705 ph->nextpayload = chain->first_payload_type;
2708 tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16;
2709 int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size;
2710 plen += vec_len (chain->data) + iv_len;
2712 /* add space for hmac/tag */
2714 plen += tr_integ->key_trunc;
2716 plen += IKEV2_GCM_ICV_SIZE;
2719 if (tlen + b->current_length + b->current_data > buffer_data_size)
2725 /* payload and total length */
2726 ph->length = clib_host_to_net_u16 (plen);
2727 ike->length = clib_host_to_net_u32 (tlen);
2731 if (!ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data,
2732 ph->payload, (u8 *) ike,
2733 sizeof (*ike) + sizeof (*ph),
2734 ph->payload + plen - sizeof (*ph) -
2735 IKEV2_GCM_ICV_SIZE))
2743 if (!ikev2_encrypt_data
2744 (ptd, sa, tr_encr, chain->data, ph->payload))
2750 ikev2_calc_integr (tr_integ,
2751 sa->is_initiator ? sa->sk_ai : sa->sk_ar,
2752 (u8 *) ike, tlen - tr_integ->key_trunc);
2753 clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
2754 sizeof (*ike), integ, tr_integ->key_trunc);
2757 /* store whole IKE payload - needed for retransmit */
2758 vec_reset_length (sa->last_res_packet_data);
2759 vec_add (sa->last_res_packet_data, ike, tlen);
2763 ikev2_payload_destroy_chain (chain);
2769 ikev2_retransmit_sa_init_one (ikev2_sa_t * sa, ike_header_t * ike,
2770 ip_address_t iaddr, ip_address_t raddr,
2775 u8 payload = ike->nextpayload;
2777 if (sa->ispi != clib_net_to_host_u64 (ike->ispi) ||
2778 ip_address_cmp (&sa->iaddr, &iaddr) ||
2779 ip_address_cmp (&sa->raddr, &raddr))
2784 while (p < rlen && payload != IKEV2_PAYLOAD_NONE)
2786 ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
2787 u32 plen = clib_net_to_host_u16 (ikep->length);
2789 if (plen < sizeof (ike_payload_header_t))
2792 if (payload == IKEV2_PAYLOAD_NONCE &&
2793 !clib_memcmp (sa->i_nonce, ikep->payload, plen - sizeof (*ikep)))
2795 /* req is retransmit */
2796 if (sa->state == IKEV2_STATE_SA_INIT)
2798 sa->stats.n_init_retransmit++;
2799 tmp = (ike_header_t *) sa->last_sa_init_res_packet_data;
2800 u32 slen = clib_net_to_host_u32 (tmp->length);
2801 ike->ispi = tmp->ispi;
2802 ike->rspi = tmp->rspi;
2803 ike->nextpayload = tmp->nextpayload;
2804 ike->version = tmp->version;
2805 ike->exchange = tmp->exchange;
2806 ike->flags = tmp->flags;
2807 ike->msgid = tmp->msgid;
2808 ike->length = tmp->length;
2809 clib_memcpy_fast (ike->payload, tmp->payload,
2810 slen - sizeof (*ike));
2811 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2812 "ispi %lx IKE_SA_INIT retransmit "
2813 "from %d.%d.%d.%d to %d.%d.%d.%d",
2815 ip_addr_v4 (&raddr).as_u32,
2816 ip_addr_v4 (&iaddr).as_u32);
2819 /* else ignore req */
2822 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG,
2823 "ispi %lx IKE_SA_INIT ignore "
2824 "from %d.%d.%d.%d to %d.%d.%d.%d",
2826 ip_addr_v4 (&raddr).as_u32,
2827 ip_addr_v4 (&iaddr).as_u32);
2831 payload = ikep->nextpayload;
2839 ikev2_retransmit_sa_init (ike_header_t * ike, ip_address_t iaddr,
2840 ip_address_t raddr, u32 rlen)
2844 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
2847 pool_foreach (sa, ptd->sas) {
2848 res = ikev2_retransmit_sa_init_one (sa, ike, iaddr, raddr, rlen);
2854 /* req is not retransmit */
2859 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2861 if (ike_hdr_is_response (ike))
2864 u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2867 if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0)
2869 sa->last_msg_id = msg_id;
2873 /* retransmitted req */
2874 if (msg_id == sa->last_msg_id)
2876 sa->stats.n_retransmit++;
2877 ike_header_t *tmp = (ike_header_t *) sa->last_res_packet_data;
2878 u32 slen = clib_net_to_host_u32 (tmp->length);
2879 ike->ispi = tmp->ispi;
2880 ike->rspi = tmp->rspi;
2881 ike->nextpayload = tmp->nextpayload;
2882 ike->version = tmp->version;
2883 ike->exchange = tmp->exchange;
2884 ike->flags = tmp->flags;
2885 ike->msgid = tmp->msgid;
2886 ike->length = tmp->length;
2887 clib_memcpy_fast (ike->payload, tmp->payload, slen - sizeof (*ike));
2888 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d",
2889 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2890 ip_addr_v4 (&sa->iaddr).as_u32);
2894 /* old req ignore */
2895 ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d",
2896 msg_id, ip_addr_v4 (&sa->raddr).as_u32,
2897 ip_addr_v4 (&sa->iaddr).as_u32);
2902 ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa)
2904 ikev2_main_t *km = &ikev2_main;
2905 sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period;
2906 sa->profile_index = ~0;
2910 ikev2_del_sa_init_from_main (u64 * ispi)
2912 ikev2_main_t *km = &ikev2_main;
2913 uword *p = hash_get (km->sa_by_ispi, *ispi);
2916 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
2917 hash_unset (km->sa_by_ispi, sai->ispi);
2918 ikev2_sa_free_all_vec (sai);
2919 pool_put (km->sais, sai);
2924 ikev2_del_sa_init (u64 ispi)
2926 vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi,
2931 ikev2_rewrite_v6_addrs (ikev2_sa_t *sa, ip6_header_t *ih)
2933 if (sa->is_initiator)
2935 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2936 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2940 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2941 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2946 ikev2_rewrite_v4_addrs (ikev2_sa_t *sa, ip4_header_t *ih)
2948 if (sa->is_initiator)
2950 ip_address_copy_addr (&ih->dst_address, &sa->raddr);
2951 ip_address_copy_addr (&ih->src_address, &sa->iaddr);
2955 ip_address_copy_addr (&ih->dst_address, &sa->iaddr);
2956 ip_address_copy_addr (&ih->src_address, &sa->raddr);
2961 ikev2_set_ip_address (ikev2_sa_t *sa, const void *iaddr, const void *raddr,
2962 const ip_address_family_t af)
2964 ip_address_set (&sa->raddr, raddr, af);
2965 ip_address_set (&sa->iaddr, iaddr, af);
2969 ikev2_elog_uint_peers_addr (u32 exchange, ip4_header_t * ip4,
2970 ip6_header_t * ip6, u8 is_ip4)
2975 src = ip4->src_address.as_u32;
2976 dst = ip4->dst_address.as_u32;
2980 src = ip6->src_address.as_u32[3];
2981 dst = ip6->dst_address.as_u32[3];
2983 ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d "
2984 "received from %d.%d.%d.%d to %d.%d.%d.%d",
2985 exchange, src, dst);
2989 ikev2_generate_sa_init_data_and_log (ikev2_sa_t * sa)
2991 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (sa);
2993 if (PREDICT_TRUE (rc == IKEV2_GENERATE_SA_INIT_OK))
2996 if (rc == IKEV2_GENERATE_SA_INIT_ERR_NO_DH)
2997 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_NO_DH_STR);
2998 else if (rc == IKEV2_GENERATE_SA_INIT_ERR_UNSUPPORTED_DH)
2999 ikev2_elog_error (IKEV2_GENERATE_SA_INIT_OK_ERR_UNSUPP_STR);
3003 ikev2_update_stats (vlib_main_t *vm, u32 node_index, ikev2_stats_t *s)
3005 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_KEEPALIVE,
3007 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_REKEY_REQ,
3009 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_INIT_SA_REQ,
3011 vlib_node_increment_counter (vm, node_index, IKEV2_ERROR_IKE_AUTH_REQ,
3016 ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node,
3017 vlib_frame_t *frame, u8 is_ip4, u8 natt)
3019 u32 n_left = frame->n_vectors, *from;
3020 ikev2_main_t *km = &ikev2_main;
3021 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
3022 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
3023 ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data ();
3024 ikev2_stats_t _stats, *stats = &_stats;
3027 /* no NAT traversal for ip6 */
3028 ASSERT (!natt || is_ip4);
3030 clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16));
3031 from = vlib_frame_vector_args (frame);
3032 vlib_get_buffers (vm, from, bufs, n_left);
3037 vlib_buffer_t *b0 = b[0];
3038 next[0] = is_ip4 ? IKEV2_NEXT_IP4_ERROR_DROP
3039 : IKEV2_NEXT_IP6_ERROR_DROP;
3040 ip4_header_t *ip40 = 0;
3041 ip6_header_t *ip60 = 0;
3044 ikev2_sa_t *sa0 = 0;
3045 ikev2_sa_t sa; /* temporary store for SA */
3052 u8 *ptr = vlib_buffer_get_current (b0);
3053 ip40 = (ip4_header_t *) ptr;
3054 ptr += sizeof (*ip40);
3055 udp0 = (udp_header_t *) ptr;
3056 ptr += sizeof (*udp0);
3057 ike0 = (ike_header_t *) ptr;
3058 ip_hdr_sz = sizeof (*ip40);
3062 u8 *ipx_hdr = b0->data + vnet_buffer (b0)->l3_hdr_offset;
3063 ike0 = vlib_buffer_get_current (b0);
3064 vlib_buffer_advance (b0, -sizeof (*udp0));
3065 udp0 = vlib_buffer_get_current (b0);
3069 ip40 = (ip4_header_t *) ipx_hdr;
3070 ip_hdr_sz = sizeof (*ip40);
3074 ip60 = (ip6_header_t *) ipx_hdr;
3075 ip_hdr_sz = sizeof (*ip60);
3077 vlib_buffer_advance (b0, -ip_hdr_sz);
3080 rlen = b0->current_length - ip_hdr_sz - sizeof (*udp0);
3082 /* check for non-esp marker */
3085 ASSERT (*((u32 *) ike0) == 0);
3087 (ike_header_t *) ((u8 *) ike0 + sizeof (ikev2_non_esp_marker));
3088 rlen -= sizeof (ikev2_non_esp_marker);
3091 if (clib_net_to_host_u32 (ike0->length) != rlen)
3093 vlib_node_increment_counter (vm, node->node_index,
3094 IKEV2_ERROR_BAD_LENGTH, 1);
3098 if (ike0->version != IKE_VERSION_2)
3100 vlib_node_increment_counter (vm, node->node_index,
3101 IKEV2_ERROR_NOT_IKEV2, 1);
3105 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
3108 clib_memset (sa0, 0, sizeof (*sa0));
3110 if (ike_hdr_is_initiator (ike0))
3112 sa0->stats.n_sa_init_req++;
3113 stats->n_sa_init_req++;
3114 if (ike0->rspi == 0)
3117 ikev2_set_ip_address (sa0, &ip40->src_address,
3118 &ip40->dst_address, AF_IP4);
3120 ikev2_set_ip_address (sa0, &ip60->src_address,
3121 &ip60->dst_address, AF_IP6);
3123 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3126 ikev2_retransmit_sa_init (ike0, sa0->iaddr,
3130 vlib_node_increment_counter (vm, node->node_index,
3133 IKEV2_ERROR_IKE_SA_INIT_IGNORE
3135 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
3140 res = ikev2_process_sa_init_req (
3141 vm, sa0, ike0, udp0, rlen,
3142 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
3144 vlib_node_increment_counter (vm, node->node_index,
3145 IKEV2_ERROR_MALFORMED_PACKET,
3148 if (sa0->state == IKEV2_STATE_SA_INIT)
3150 ikev2_sa_free_proposal_vector (&sa0->r_proposals);
3152 ikev2_select_proposal (sa0->i_proposals,
3153 IKEV2_PROTOCOL_IKE);
3154 ikev2_generate_sa_init_data_and_log (sa0);
3157 if (sa0->state == IKEV2_STATE_SA_INIT
3158 || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
3160 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3162 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3164 vlib_node_increment_counter (vm, node->node_index,
3165 IKEV2_ERROR_NO_BUFF_SPACE,
3169 if (sa0->state == IKEV2_STATE_SA_INIT)
3171 /* add SA to the pool */
3172 pool_get (ptd->sas, sa0);
3173 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3174 ikev2_init_sa (vm, sa0);
3175 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3179 ikev2_sa_free_all_vec (sa0);
3183 else //received sa_init without initiator flag
3186 ikev2_set_ip_address (sa0, &ip40->dst_address,
3187 &ip40->src_address, AF_IP4);
3189 ikev2_set_ip_address (sa0, &ip60->dst_address,
3190 &ip60->src_address, AF_IP6);
3192 ikev2_process_sa_init_resp (vm, sa0, ike0, udp0, rlen);
3194 if (sa0->state == IKEV2_STATE_SA_INIT)
3197 ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
3198 uword *p = hash_get (km->sa_by_ispi, sa0->ispi);
3201 ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]);
3203 if (clib_atomic_bool_cmp_and_swap
3204 (&sai->init_response_received, 0, 1))
3206 ikev2_complete_sa_data (sa0, sai);
3207 ikev2_calc_keys (sa0);
3208 ikev2_sa_auth_init (sa0);
3209 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3211 clib_net_to_host_u32 (sai->last_init_msg_id);
3212 sa0->last_init_msg_id = sai->last_init_msg_id + 1;
3213 slen = ikev2_generate_message (b0, sa0, ike0, 0,
3216 vlib_node_increment_counter (vm,
3218 IKEV2_ERROR_NO_BUFF_SPACE,
3223 /* we've already processed sa-init response */
3224 sa0->state = IKEV2_STATE_UNKNOWN;
3229 if (sa0->state == IKEV2_STATE_SA_INIT)
3231 /* add SA to the pool */
3232 pool_get (ptd->sas, sa0);
3233 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
3234 hash_set (ptd->sa_by_rspi, sa0->rspi, sa0 - ptd->sas);
3238 ikev2_sa_free_all_vec (sa0);
3242 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
3245 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3248 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3249 slen = ikev2_retransmit_resp (sa0, ike0);
3252 vlib_node_increment_counter (vm, node->node_index,
3255 IKEV2_ERROR_IKE_REQ_IGNORE
3257 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3262 sa0->dst_port = clib_net_to_host_u16 (udp0->src_port);
3263 res = ikev2_process_auth_req (vm, sa0, ike0, rlen);
3265 ikev2_sa_auth (sa0);
3267 vlib_node_increment_counter (vm, node->node_index,
3268 IKEV2_ERROR_MALFORMED_PACKET, 1);
3269 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
3271 ikev2_initial_contact_cleanup (ptd, sa0);
3272 ikev2_sa_match_ts (sa0);
3273 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
3274 ikev2_create_tunnel_interface (vm, sa0, &sa0->childs[0],
3278 if (sa0->is_initiator)
3280 sa0->last_msg_id = ~0;
3281 ikev2_del_sa_init (sa0->ispi);
3285 sa0->stats.n_sa_auth_req++;
3286 stats->n_sa_auth_req++;
3287 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3289 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3291 vlib_node_increment_counter (vm, node->node_index,
3292 IKEV2_ERROR_NO_BUFF_SPACE,
3297 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
3300 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3303 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3304 slen = ikev2_retransmit_resp (sa0, ike0);
3307 vlib_node_increment_counter (vm, node->node_index,
3310 IKEV2_ERROR_IKE_REQ_IGNORE
3312 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3317 res = ikev2_process_informational_req (vm, sa0, ike0, rlen);
3320 vlib_node_increment_counter (vm, node->node_index,
3321 IKEV2_ERROR_MALFORMED_PACKET,
3329 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
3331 ikev2_delete_t *d, *tmp, *resp = 0;
3332 vec_foreach (d, sa0->del)
3334 ikev2_child_sa_t *ch_sa;
3335 ch_sa = ikev2_sa_get_child (sa0, d->spi,
3337 !sa0->is_initiator);
3340 ikev2_delete_tunnel_interface (km->vnet_main,
3342 if (!sa0->is_initiator)
3344 vec_add2 (resp, tmp, 1);
3345 tmp->protocol_id = d->protocol_id;
3346 tmp->spi = ch_sa->r_proposals[0].spi;
3348 ikev2_sa_del_child_sa (sa0, ch_sa);
3351 if (!sa0->is_initiator)
3353 vec_free (sa0->del);
3358 if (ike_hdr_is_request (ike0))
3360 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3362 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3364 vlib_node_increment_counter (vm, node->node_index,
3365 IKEV2_ERROR_NO_BUFF_SPACE,
3370 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
3373 p = hash_get (ptd->sa_by_rspi, clib_net_to_host_u64 (ike0->rspi));
3376 sa0 = pool_elt_at_index (ptd->sas, p[0]);
3377 slen = ikev2_retransmit_resp (sa0, ike0);
3380 vlib_node_increment_counter (vm, node->node_index,
3383 IKEV2_ERROR_IKE_REQ_IGNORE
3385 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
3390 res = ikev2_process_create_child_sa_req (vm, sa0, ike0, rlen);
3393 vlib_node_increment_counter (vm, node->node_index,
3394 IKEV2_ERROR_MALFORMED_PACKET,
3400 if (vec_len (sa0->rekey) > 0)
3402 if (!sa0->rekey[0].notify_type &&
3403 sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
3405 if (vec_len (sa0->childs) > 0)
3406 ikev2_sa_free_all_child_sa (&sa0->childs);
3407 ikev2_child_sa_t *child;
3408 vec_add2 (sa0->childs, child, 1);
3409 clib_memset (child, 0, sizeof (*child));
3410 child->r_proposals = sa0->rekey[0].r_proposal;
3411 child->i_proposals = sa0->rekey[0].i_proposal;
3412 child->tsi = sa0->rekey[0].tsi;
3413 child->tsr = sa0->rekey[0].tsr;
3414 ikev2_create_tunnel_interface (vm, sa0, child, p[0],
3415 child - sa0->childs, 1,
3418 if (ike_hdr_is_response (ike0))
3420 vec_free (sa0->rekey);
3424 stats->n_rekey_req++;
3425 sa0->stats.n_rekey_req++;
3426 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3428 ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats);
3430 vlib_node_increment_counter (vm, node->node_index,
3431 IKEV2_ERROR_NO_BUFF_SPACE,
3435 else if (vec_len (sa0->new_child) > 0)
3437 ikev2_child_sa_t *c;
3438 vec_add2 (sa0->childs, c, 1);
3439 memset (c, 0, sizeof (*c));
3440 c->r_proposals = sa0->new_child[0].r_proposal;
3441 c->i_proposals = sa0->new_child[0].i_proposal;
3442 c->tsi = sa0->new_child[0].tsi;
3443 c->tsr = sa0->new_child[0].tsr;
3444 ikev2_create_tunnel_interface (vm, sa0, c, p[0],
3446 sa0->new_child[0].kex);
3447 if (ike_hdr_is_request (ike0))
3449 ike0->flags = IKEV2_HDR_FLAG_RESPONSE;
3451 ikev2_generate_message (b0, sa0, ike0, 0, udp0, 0);
3453 vlib_node_increment_counter (
3454 vm, node->node_index, IKEV2_ERROR_NO_BUFF_SPACE, 1);
3461 ikev2_elog_uint_peers_addr (ike0->exchange, ip40, ip60, is_ip4);
3465 /* if we are sending packet back, rewrite headers */
3466 if (slen && ~0 != slen)
3470 next[0] = IKEV2_NEXT_IP4_LOOKUP;
3471 ikev2_rewrite_v4_addrs (sa0, ip40);
3475 next[0] = IKEV2_NEXT_IP6_LOOKUP;
3476 ikev2_rewrite_v6_addrs (sa0, ip60);
3481 udp0->dst_port = udp0->src_port =
3482 clib_net_to_host_u16 (ikev2_get_port (sa0));
3484 if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT)
3485 && ikev2_natt_active (sa0))
3488 slen = ikev2_insert_non_esp_marker (ike0, slen);
3494 slen += sizeof (ikev2_non_esp_marker);
3496 u16 tp = udp0->dst_port;
3497 udp0->dst_port = udp0->src_port;
3498 udp0->src_port = tp;
3501 udp0->length = clib_host_to_net_u16 (slen + sizeof (udp_header_t));
3503 b0->current_length = slen + ip_hdr_sz + sizeof (udp_header_t);
3506 ip40->length = clib_host_to_net_u16 (b0->current_length);
3507 ip40->checksum = ip4_header_checksum (ip40);
3511 ip60->payload_length =
3512 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3516 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
3517 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
3519 ikev2_child_sa_t *c;
3521 vec_foreach (c, sa0->childs)
3522 ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
3524 ikev2_delete_sa (ptd, sa0);
3526 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
3527 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
3530 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
3531 t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
3532 t->next_index = next[0];
3539 ikev2_update_stats (vm, node->node_index, stats);
3540 vlib_node_increment_counter (vm, node->node_index,
3541 IKEV2_ERROR_PROCESSED, frame->n_vectors);
3542 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
3543 return frame->n_vectors;
3547 ikev2_ip4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3549 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 0);
3553 ikev2_ip4_natt (vlib_main_t *vm, vlib_node_runtime_t *node,
3554 vlib_frame_t *frame)
3556 return ikev2_node_internal (vm, node, frame, 1 /* is_ip4 */, 1 /* natt */);
3560 ikev2_ip6 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3562 return ikev2_node_internal (vm, node, frame, 0 /* is_ip4 */, 0);
3566 VLIB_REGISTER_NODE (ikev2_node_ip4,static) = {
3567 .function = ikev2_ip4,
3568 .name = "ikev2-ip4",
3569 .vector_size = sizeof (u32),
3570 .format_trace = format_ikev2_trace,
3571 .type = VLIB_NODE_TYPE_INTERNAL,
3573 .n_errors = IKEV2_N_ERROR,
3574 .error_counters = ikev2_error_counters,
3576 .n_next_nodes = IKEV2_IP4_N_NEXT,
3578 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3579 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3583 VLIB_REGISTER_NODE (ikev2_node_ip4_natt,static) = {
3584 .function = ikev2_ip4_natt,
3585 .name = "ikev2-ip4-natt",
3586 .vector_size = sizeof (u32),
3587 .format_trace = format_ikev2_trace,
3588 .type = VLIB_NODE_TYPE_INTERNAL,
3590 .n_errors = IKEV2_N_ERROR,
3591 .error_counters = ikev2_error_counters,
3593 .n_next_nodes = IKEV2_IP4_N_NEXT,
3595 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
3596 [IKEV2_NEXT_IP4_ERROR_DROP] = "error-drop",
3600 VLIB_REGISTER_NODE (ikev2_node_ip6,static) = {
3601 .function = ikev2_ip6,
3602 .name = "ikev2-ip6",
3603 .vector_size = sizeof (u32),
3604 .format_trace = format_ikev2_trace,
3605 .type = VLIB_NODE_TYPE_INTERNAL,
3607 .n_errors = IKEV2_N_ERROR,
3608 .error_counters = ikev2_error_counters,
3610 .n_next_nodes = IKEV2_IP6_N_NEXT,
3612 [IKEV2_NEXT_IP6_LOOKUP] = "ip6-lookup",
3613 [IKEV2_NEXT_IP6_ERROR_DROP] = "error-drop",
3618 // set ikev2 proposals when vpp is used as initiator
3619 static clib_error_t *
3620 ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
3621 ikev2_transforms_set * ts,
3622 ikev2_sa_proposal_t ** proposals, int is_ike)
3625 ikev2_main_t *km = &ikev2_main;
3626 ikev2_sa_proposal_t *proposal;
3627 vec_add2 (*proposals, proposal, 1);
3628 ikev2_sa_transform_t *td;
3633 vec_foreach (td, km->supported_transforms)
3635 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
3636 && td->encr_type == ts->crypto_alg
3637 && td->key_len == ts->crypto_key_size / 8)
3640 attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
3641 attr[1] = clib_host_to_net_u16 (td->key_len << 3);
3642 vec_add (td->attrs, (u8 *) attr, 4);
3643 vec_add1 (proposal->transforms, *td);
3652 r = clib_error_return (0, "Unsupported algorithm");
3656 if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg)
3660 vec_foreach (td, km->supported_transforms)
3662 if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
3663 && td->integ_type == ts->integ_alg)
3665 vec_add1 (proposal->transforms, *td);
3673 ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
3674 r = clib_error_return (0, "Unsupported algorithm");
3683 vec_foreach (td, km->supported_transforms)
3685 if (td->type == IKEV2_TRANSFORM_TYPE_PRF
3686 && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
3688 vec_add1 (proposal->transforms, *td);
3695 r = clib_error_return (0, "Unsupported algorithm");
3704 vec_foreach (td, km->supported_transforms)
3706 if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
3708 vec_add1 (proposal->transforms, *td);
3711 sa->dh_group = td->dh_type;
3719 r = clib_error_return (0, "Unsupported algorithm");
3727 vec_foreach (td, km->supported_transforms)
3729 if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
3731 vec_add1 (proposal->transforms, *td);
3737 r = clib_error_return (0, "Unsupported algorithm");
3746 static ikev2_profile_t *
3747 ikev2_profile_index_by_name (u8 * name)
3749 ikev2_main_t *km = &ikev2_main;
3752 p = mhash_get (&km->profile_index_by_name, name);
3756 return pool_elt_at_index (km->profiles, p[0]);
3761 ikev2_send_ike (vlib_main_t * vm, ip_address_t * src, ip_address_t * dst,
3762 u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index)
3771 b0 = vlib_get_buffer (vm, bi0);
3772 vlib_buffer_advance (b0, -sizeof (udp_header_t));
3773 udp0 = vlib_buffer_get_current (b0);
3774 udp0->dst_port = clib_host_to_net_u16 (dst_port);
3775 udp0->src_port = clib_host_to_net_u16 (src_port);
3776 udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
3779 if (ip_addr_version (dst) == AF_IP4)
3781 vlib_buffer_advance (b0, -sizeof (ip4_header_t));
3782 ip40 = vlib_buffer_get_current (b0);
3783 ip40->ip_version_and_header_length = 0x45;
3785 ip40->fragment_id = 0;
3786 ip40->flags_and_fragment_offset = 0;
3788 ip40->protocol = IP_PROTOCOL_UDP;
3789 ip40->dst_address.as_u32 = ip_addr_v4 (dst).as_u32;
3790 ip40->src_address.as_u32 = ip_addr_v4 (src).as_u32;
3791 b0->current_length =
3792 len + sizeof (ip4_header_t) + sizeof (udp_header_t);
3793 ip40->length = clib_host_to_net_u16 (b0->current_length);
3794 ip40->checksum = ip4_header_checksum (ip40);
3798 vlib_buffer_advance (b0, -sizeof (ip6_header_t));
3799 ip60 = vlib_buffer_get_current (b0);
3801 b0->current_length = len + sizeof (*ip60) + sizeof (udp_header_t);
3802 ip60->ip_version_traffic_class_and_flow_label =
3803 clib_host_to_net_u32 (0x6 << 28);
3804 ip60->payload_length =
3805 clib_host_to_net_u16 (b0->current_length - sizeof (*ip60));
3806 ip60->protocol = IP_PROTOCOL_UDP;
3807 ip60->hop_limit = 0xff;
3808 clib_memcpy_fast (ip60->src_address.as_u8, ip_addr_v6 (src).as_u8,
3809 sizeof (ip60->src_address));
3810 clib_memcpy_fast (ip60->dst_address.as_u8, ip_addr_v6 (dst).as_u8,
3811 sizeof (ip60->src_address));
3814 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3815 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index;
3816 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
3818 u32 next_index = (ip_addr_version (dst) == AF_IP4) ?
3819 ip4_lookup_node.index : ip6_lookup_node.index;
3821 /* send the request */
3822 f = vlib_get_frame_to_node (vm, next_index);
3823 to_next = vlib_frame_vector_args (f);
3826 vlib_put_frame_to_node (vm, next_index, f);
3831 ikev2_get_new_ike_header_buff (vlib_main_t * vm, vlib_buffer_t ** b)
3834 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
3839 *b = vlib_get_buffer (vm, bi0);
3844 ikev2_set_local_key (vlib_main_t * vm, u8 * file)
3846 ikev2_main_t *km = &ikev2_main;
3849 EVP_PKEY_free (km->pkey);
3850 km->pkey = ikev2_load_key_file (file);
3851 if (km->pkey == NULL)
3852 return clib_error_return (0, "load key '%s' failed", file);
3857 static vnet_api_error_t
3858 ikev2_register_udp_port (ikev2_profile_t *p, u16 port)
3860 ipsec_register_udp_port (port, 0 /* is_ip4 */);
3861 ipsec_register_udp_port (port, 1 /* is_ip4 */);
3862 p->ipsec_over_udp_port = port;
3867 ikev2_unregister_udp_port (ikev2_profile_t *p)
3869 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
3872 ipsec_unregister_udp_port (p->ipsec_over_udp_port, 0 /* is_ip4 */);
3873 ipsec_unregister_udp_port (p->ipsec_over_udp_port, 1 /* is_ip4 */);
3874 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
3878 ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm,
3879 ikev2_main_per_thread_data_t * tkm,
3880 ikev2_sa_t * sa, u8 send_notification)
3882 ikev2_main_t *km = &ikev2_main;
3883 ip_address_t *src, *dst;
3885 ikev2_child_sa_t *c;
3887 /* Create the Initiator notification for IKE SA removal */
3892 vec_resize (sa->del, 1);
3893 sa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3894 sa->del->spi = sa->ispi;
3896 if (send_notification)
3898 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
3901 ikev2_log_error ("buffer alloc failure");
3905 ike0 = vlib_buffer_get_current (b0);
3906 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3907 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3908 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3910 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
3911 sa->last_init_msg_id += 1;
3912 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
3916 if (ikev2_natt_active (sa))
3917 len = ikev2_insert_non_esp_marker (ike0, len);
3919 if (sa->is_initiator)
3930 ikev2_send_ike (vm, src, dst, bi0, len,
3931 ikev2_get_port (sa), sa->dst_port, 0);
3935 /* delete local SA */
3936 vec_foreach (c, sa->childs)
3937 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
3939 u64 rspi = sa->rspi;
3940 ikev2_sa_free_all_vec (sa);
3941 uword *p = hash_get (tkm->sa_by_rspi, rspi);
3944 hash_unset (tkm->sa_by_rspi, rspi);
3945 pool_put (tkm->sas, sa);
3950 ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p)
3952 ikev2_main_per_thread_data_t *tkm;
3954 u32 pi = p - km->profiles;
3959 pool_foreach (sa, km->sais) {
3960 if (pi == sa->profile_index)
3961 vec_add1 (del_sai, sa - km->sais);
3965 vec_foreach (sai, del_sai)
3967 sa = pool_elt_at_index (km->sais, sai[0]);
3968 ikev2_sa_free_all_vec (sa);
3969 hash_unset (km->sa_by_ispi, sa->ispi);
3970 pool_put (km->sais, sa);
3972 vec_reset_length (del_sai);
3974 vec_foreach (tkm, km->per_thread_data)
3977 pool_foreach (sa, tkm->sas) {
3978 if (sa->profile_index != ~0 && pi == sa->profile_index)
3979 vec_add1 (del_sai, sa - tkm->sas);
3983 vec_foreach (sai, del_sai)
3985 sa = pool_elt_at_index (tkm->sas, sai[0]);
3986 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa, 1);
3989 vec_reset_length (del_sai);
3996 ikev2_profile_responder_free (ikev2_responder_t *r)
3998 vec_free (r->hostname);
4002 ikev2_profile_free (ikev2_profile_t * p)
4006 vec_free (p->auth.data);
4008 EVP_PKEY_free (p->auth.key);
4010 ikev2_profile_responder_free (&p->responder);
4012 vec_free (p->loc_id.data);
4013 vec_free (p->rem_id.data);
4017 ikev2_bind (vlib_main_t *vm, ikev2_main_t *km)
4019 if (0 == km->bind_refcount)
4021 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1);
4022 udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0);
4023 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip4.index, 1);
4024 udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node_ip6.index, 0);
4026 vlib_punt_register (km->punt_hdl,
4027 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4031 km->bind_refcount++;
4035 ikev2_unbind (vlib_main_t *vm, ikev2_main_t *km)
4037 km->bind_refcount--;
4038 if (0 == km->bind_refcount)
4040 vlib_punt_unregister (km->punt_hdl,
4041 ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0],
4044 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 0);
4045 udp_unregister_dst_port (vm, IKEV2_PORT_NATT, 1);
4046 udp_unregister_dst_port (vm, IKEV2_PORT, 0);
4047 udp_unregister_dst_port (vm, IKEV2_PORT, 1);
4051 static void ikev2_lazy_init (ikev2_main_t *km);
4054 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
4056 ikev2_main_t *km = &ikev2_main;
4059 ikev2_lazy_init (km);
4063 if (ikev2_profile_index_by_name (name))
4064 return clib_error_return (0, "policy %v already exists", name);
4066 pool_get (km->profiles, p);
4067 clib_memset (p, 0, sizeof (*p));
4068 p->name = vec_dup (name);
4069 p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE;
4070 p->responder.sw_if_index = ~0;
4072 uword index = p - km->profiles;
4073 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
4075 ikev2_bind (vm, km);
4079 p = ikev2_profile_index_by_name (name);
4081 return clib_error_return (0, "policy %v does not exists", name);
4083 ikev2_unbind (vm, km);
4085 ikev2_unregister_udp_port (p);
4086 ikev2_cleanup_profile_sessions (km, p);
4088 ikev2_profile_free (p);
4089 pool_put (km->profiles, p);
4090 mhash_unset (&km->profile_index_by_name, name, 0);
4096 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
4097 u8 * auth_data, u8 data_hex_format)
4102 p = ikev2_profile_index_by_name (name);
4106 r = clib_error_return (0, "unknown profile %v", name);
4111 EVP_PKEY_free (p->auth.key);
4112 vec_free (p->auth.data);
4114 p->auth.method = auth_method;
4115 p->auth.data = vec_dup (auth_data);
4116 p->auth.hex = data_hex_format;
4118 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
4120 vec_add1 (p->auth.data, 0);
4121 p->auth.key = ikev2_load_cert_file (p->auth.data);
4122 if (p->auth.key == NULL)
4123 return clib_error_return (0, "load cert '%s' failed", p->auth.data);
4130 ikev2_is_id_supported (u8 id_type)
4132 return (id_type == IKEV2_ID_TYPE_ID_IPV4_ADDR ||
4133 id_type == IKEV2_ID_TYPE_ID_IPV6_ADDR ||
4134 id_type == IKEV2_ID_TYPE_ID_RFC822_ADDR ||
4135 id_type == IKEV2_ID_TYPE_ID_FQDN);
4139 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
4145 if (!ikev2_is_id_supported (id_type))
4147 r = clib_error_return (0, "unsupported identity type %U",
4148 format_ikev2_id_type, id_type);
4152 p = ikev2_profile_index_by_name (name);
4156 r = clib_error_return (0, "unknown profile %v", name);
4162 vec_free (p->loc_id.data);
4163 p->loc_id.type = id_type;
4164 p->loc_id.data = vec_dup (data);
4168 vec_free (p->rem_id.data);
4169 p->rem_id.type = id_type;
4170 p->rem_id.data = vec_dup (data);
4177 ikev2_set_ts_type (ikev2_ts_t *ts, const ip_address_t *addr)
4179 if (ip_addr_version (addr) == AF_IP4)
4180 ts->ts_type = TS_IPV4_ADDR_RANGE;
4182 ts->ts_type = TS_IPV6_ADDR_RANGE;
4186 ikev2_set_ts_addrs (ikev2_ts_t *ts, const ip_address_t *start,
4187 const ip_address_t *end)
4189 ip_address_copy (&ts->start_addr, start);
4190 ip_address_copy (&ts->end_addr, end);
4194 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
4195 u16 start_port, u16 end_port, ip_address_t start_addr,
4196 ip_address_t end_addr, int is_local)
4201 p = ikev2_profile_index_by_name (name);
4205 r = clib_error_return (0, "unknown profile %v", name);
4209 if (ip_addr_version (&start_addr) != ip_addr_version (&end_addr))
4210 return clib_error_return (0, "IP address version mismatch!");
4214 ikev2_set_ts_addrs (&p->loc_ts, &start_addr, &end_addr);
4215 p->loc_ts.start_port = start_port;
4216 p->loc_ts.end_port = end_port;
4217 p->loc_ts.protocol_id = protocol_id;
4218 ikev2_set_ts_type (&p->loc_ts, &start_addr);
4222 ikev2_set_ts_addrs (&p->rem_ts, &start_addr, &end_addr);
4223 p->rem_ts.start_port = start_port;
4224 p->rem_ts.end_port = end_port;
4225 p->rem_ts.protocol_id = protocol_id;
4226 ikev2_set_ts_type (&p->rem_ts, &start_addr);
4233 ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname,
4239 p = ikev2_profile_index_by_name (name);
4243 r = clib_error_return (0, "unknown profile %v", name);
4247 p->responder.is_resolved = 0;
4248 p->responder.sw_if_index = sw_if_index;
4249 p->responder.hostname = vec_dup (hostname);
4255 ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
4256 u32 sw_if_index, ip_address_t addr)
4261 p = ikev2_profile_index_by_name (name);
4265 r = clib_error_return (0, "unknown profile %v", name);
4269 p->responder.is_resolved = 1;
4270 p->responder.sw_if_index = sw_if_index;
4271 ip_address_copy (&p->responder.addr, &addr);
4277 ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
4278 ikev2_transform_encr_type_t crypto_alg,
4279 ikev2_transform_integ_type_t integ_alg,
4280 ikev2_transform_dh_type_t dh_type,
4281 u32 crypto_key_size)
4285 p = ikev2_profile_index_by_name (name);
4287 return clib_error_return (0, "unknown profile %v", name);
4289 if ((IKEV2_TRANSFORM_INTEG_TYPE_NONE != integ_alg) +
4290 (IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16 == crypto_alg) !=
4292 return clib_error_return (0, "invalid cipher + integrity algorithm");
4294 p->ike_ts.crypto_alg = crypto_alg;
4295 p->ike_ts.integ_alg = integ_alg;
4296 p->ike_ts.dh_type = dh_type;
4297 p->ike_ts.crypto_key_size = crypto_key_size;
4302 ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
4303 ikev2_transform_encr_type_t crypto_alg,
4304 ikev2_transform_integ_type_t integ_alg,
4305 u32 crypto_key_size)
4310 p = ikev2_profile_index_by_name (name);
4314 r = clib_error_return (0, "unknown profile %v", name);
4318 p->esp_ts.crypto_alg = crypto_alg;
4319 p->esp_ts.integ_alg = integ_alg;
4320 p->esp_ts.crypto_key_size = crypto_key_size;
4325 ikev2_set_profile_tunnel_interface (vlib_main_t * vm,
4326 u8 * name, u32 sw_if_index)
4331 p = ikev2_profile_index_by_name (name);
4335 r = clib_error_return (0, "unknown profile %v", name);
4339 p->tun_itf = sw_if_index;
4345 ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port,
4348 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4349 vnet_api_error_t rv = 0;
4352 return VNET_API_ERROR_INVALID_VALUE;
4356 if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE)
4357 return VNET_API_ERROR_VALUE_EXIST;
4359 rv = ikev2_register_udp_port (p, port);
4363 if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE)
4364 return VNET_API_ERROR_INVALID_VALUE;
4366 ikev2_unregister_udp_port (p);
4372 ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name)
4374 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
4379 r = clib_error_return (0, "unknown profile %v", name);
4388 ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
4389 u64 lifetime, u32 jitter, u32 handover,
4395 p = ikev2_profile_index_by_name (name);
4399 r = clib_error_return (0, "unknown profile %v", name);
4403 p->lifetime = lifetime;
4404 p->lifetime_jitter = jitter;
4405 p->handover = handover;
4406 p->lifetime_maxdata = maxdata;
4411 ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af,
4412 ip_address_t * out_addr)
4414 ip4_address_t *if_ip4;
4415 ip6_address_t *if_ip6;
4419 if_ip4 = ip4_interface_first_address (&ip4_main, sw_if_index, 0);
4422 ip_address_set (out_addr, if_ip4, AF_IP4);
4428 if_ip6 = ip6_interface_first_address (&ip6_main, sw_if_index);
4431 ip_address_set (out_addr, if_ip6, AF_IP6);
4438 static clib_error_t *
4439 ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r)
4441 ikev2_main_t *km = &ikev2_main;
4442 dns_cache_entry_t *ep = 0;
4443 dns_pending_request_t _t0, *t0 = &_t0;
4444 dns_resolve_name_t _rn, *rn = &_rn;
4448 if (!km->dns_resolve_name)
4449 return clib_error_return (0, "cannot load symbols from dns plugin");
4451 t0->request_type = DNS_API_PENDING_NAME_TO_IP;
4452 /* VPP main curse: IKEv2 uses only non-NULL terminated vectors internally
4453 * whereas DNS resolver expects a NULL-terminated C-string */
4454 name = vec_dup (r->hostname);
4455 vec_terminate_c_string (name);
4456 rv = km->dns_resolve_name (name, &ep, t0, rn);
4459 return clib_error_return (0, "dns lookup failure");
4464 ip_address_copy (&r->addr, &rn->address);
4470 ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
4474 ikev2_main_t *km = &ikev2_main;
4478 int len = sizeof (ike_header_t), valid_ip = 0;
4479 ip_address_t src_if_ip = ip_address_initializer;
4481 p = ikev2_profile_index_by_name (name);
4485 r = clib_error_return (0, "unknown profile %v", name);
4489 if (p->responder.sw_if_index == ~0 ||
4490 (ip_address_is_zero (&p->responder.addr) &&
4491 vec_len (p->responder.hostname) == 0))
4493 r = clib_error_return (0, "responder not set for profile %v", name);
4497 if (!p->responder.is_resolved)
4499 /* try to resolve using dns plugin
4500 * success does not mean we have resolved the name */
4501 r = ikev2_resolve_responder_hostname (vm, &p->responder);
4506 if (p->responder.is_resolved &&
4507 ikev2_get_if_address (p->responder.sw_if_index,
4508 ip_addr_version (&p->responder.addr), &src_if_ip))
4513 /* Prepare the SA and the IKE payload */
4515 clib_memset (&sa, 0, sizeof (ikev2_sa_t));
4516 ikev2_payload_chain_t *chain = 0;
4517 ikev2_payload_new_chain (chain);
4519 /* Build the IKE proposal payload */
4520 ikev2_sa_proposal_t *proposals = 0;
4521 ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
4522 proposals[0].proposal_num = 1;
4523 proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
4525 /* Add and then cleanup proposal data */
4526 ikev2_payload_add_sa (chain, proposals);
4527 ikev2_sa_free_proposal_vector (&proposals);
4529 sa.is_initiator = 1;
4530 sa.profile_index = p - km->profiles;
4531 sa.state = IKEV2_STATE_SA_INIT;
4532 sa.tun_itf = p->tun_itf;
4533 sa.udp_encap = p->udp_encap;
4534 if (p->natt_disabled)
4535 sa.natt_state = IKEV2_NATT_DISABLED;
4536 sa.ipsec_over_udp_port = p->ipsec_over_udp_port;
4537 sa.is_tun_itf_set = 1;
4538 sa.initial_contact = 1;
4539 sa.dst_port = IKEV2_PORT;
4541 ikev2_generate_sa_error_t rc = ikev2_generate_sa_init_data (&sa);
4542 if (rc != IKEV2_GENERATE_SA_INIT_OK)
4544 ikev2_sa_free_all_vec (&sa);
4545 ikev2_payload_destroy_chain (chain);
4546 return clib_error_return (0, "%U", format_ikev2_gen_sa_error, rc);
4549 ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
4550 ikev2_payload_add_nonce (chain, sa.i_nonce);
4552 /* Build the child SA proposal */
4553 vec_resize (sa.childs, 1);
4554 ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
4555 &sa.childs[0].i_proposals, 0);
4556 sa.childs[0].i_proposals[0].proposal_num = 1;
4557 sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
4558 RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
4559 sizeof (sa.childs[0].i_proposals[0].spi));
4561 /* Add NAT detection notification messages (mandatory) */
4562 u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 (
4563 clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip,
4564 clib_host_to_net_u16 (IKEV2_PORT));
4566 ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
4567 nat_detection_sha1);
4568 vec_free (nat_detection_sha1);
4569 nat_detection_sha1 =
4570 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi),
4571 clib_host_to_net_u64 (sa.rspi),
4573 clib_host_to_net_u16 (sa.dst_port));
4574 ikev2_payload_add_notify (chain,
4575 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
4576 nat_detection_sha1);
4577 vec_free (nat_detection_sha1);
4579 u8 *sig_hash_algo = vec_new (u8, 8);
4580 u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
4581 clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
4582 ikev2_payload_add_notify (chain,
4583 IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
4585 vec_free (sig_hash_algo);
4587 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4590 ikev2_sa_free_all_vec (&sa);
4591 ikev2_payload_destroy_chain (chain);
4592 char *errmsg = "buffer alloc failure";
4593 ikev2_log_error (errmsg);
4594 return clib_error_return (0, errmsg);
4596 ike0 = vlib_buffer_get_current (b0);
4598 /* Buffer update and boilerplate */
4599 len += vec_len (chain->data);
4600 ike0->nextpayload = chain->first_payload_type;
4601 ike0->length = clib_host_to_net_u32 (len);
4602 clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
4603 ikev2_payload_destroy_chain (chain);
4605 ike0->version = IKE_VERSION_2;
4606 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4607 ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
4608 ike0->ispi = clib_host_to_net_u64 (sa.ispi);
4611 sa.last_init_msg_id += 1;
4613 /* store whole IKE payload - needed for PSK auth */
4614 vec_reset_length (sa.last_sa_init_req_packet_data);
4615 vec_add (sa.last_sa_init_req_packet_data, ike0, len);
4617 /* add data to the SA then add it to the pool */
4618 ip_address_copy (&sa.iaddr, &src_if_ip);
4619 ip_address_copy (&sa.raddr, &p->responder.addr);
4620 sa.i_id.type = p->loc_id.type;
4621 sa.i_id.data = vec_dup (p->loc_id.data);
4622 sa.r_id.type = p->rem_id.type;
4623 sa.r_id.data = vec_dup (p->rem_id.data);
4624 sa.i_auth.method = p->auth.method;
4625 sa.i_auth.hex = p->auth.hex;
4626 sa.i_auth.data = vec_dup (p->auth.data);
4627 sa.sw_if_index = p->responder.sw_if_index;
4628 vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
4629 vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
4631 ikev2_initial_contact_cleanup (0, &sa);
4633 /* add SA to the pool */
4634 ikev2_sa_t *sa0 = 0;
4635 pool_get (km->sais, sa0);
4636 clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
4637 hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
4641 ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT,
4642 sa.dst_port, sa.sw_if_index);
4645 ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ",
4646 clib_host_to_net_u64 (sa0->ispi), 0,
4647 ip_addr_v4 (&p->responder.addr).as_u32,
4648 ip_addr_version (&p->responder.addr) == AF_IP4);
4655 ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4656 ikev2_child_sa_t * csa)
4658 /* Create the Initiator notification for child SA removal */
4659 ikev2_main_t *km = &ikev2_main;
4665 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4668 ikev2_log_error ("buffer alloc failure");
4672 ike0 = vlib_buffer_get_current (b0);
4673 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
4674 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4675 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4677 vec_resize (sa->del, 1);
4678 sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
4679 sa->del->spi = csa->i_proposals->spi;
4680 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4681 sa->last_init_msg_id += 1;
4682 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
4686 if (ikev2_natt_active (sa))
4687 len = ikev2_insert_non_esp_marker (ike0, len);
4688 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4689 ikev2_get_port (sa), sa->dst_port, sa->sw_if_index);
4691 /* delete local child SA */
4692 ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
4693 ikev2_sa_del_child_sa (sa, csa);
4697 ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
4700 ikev2_main_t *km = &ikev2_main;
4701 ikev2_main_per_thread_data_t *tkm;
4702 ikev2_sa_t *fsa = 0;
4703 ikev2_child_sa_t *fchild = 0;
4705 /* Search for the child SA */
4706 vec_foreach (tkm, km->per_thread_data)
4712 pool_foreach (sa, tkm->sas) {
4713 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4723 if (!fchild || !fsa)
4725 r = clib_error_return (0, "Child SA not found");
4730 ikev2_delete_child_sa_internal (vm, fsa, fchild);
4737 ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
4740 ikev2_main_t *km = &ikev2_main;
4741 ikev2_main_per_thread_data_t *tkm;
4742 ikev2_sa_t *fsa = 0;
4743 ikev2_main_per_thread_data_t *ftkm = 0;
4745 /* Search for the IKE SA */
4746 vec_foreach (tkm, km->per_thread_data)
4752 pool_foreach (sa, tkm->sas) {
4753 if (sa->ispi == ispi)
4765 r = clib_error_return (0, "IKE SA not found");
4769 ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa, 1);
4774 ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
4775 ikev2_child_sa_t * csa)
4777 /* Create the Initiator request for create child SA */
4783 bi0 = ikev2_get_new_ike_header_buff (vm, &b0);
4786 ikev2_log_error ("buffer alloc failure");
4790 ike0 = vlib_buffer_get_current (b0);
4791 ike0->version = IKE_VERSION_2;
4792 ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
4793 ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
4794 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
4795 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
4796 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
4797 sa->last_init_msg_id += 1;
4799 ikev2_rekey_t *rekey;
4800 vec_reset_length (sa->rekey);
4801 vec_add2 (sa->rekey, rekey, 1);
4803 ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
4806 RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
4807 rekey->spi = proposals[0].spi;
4808 rekey->ispi = csa->i_proposals->spi;
4809 len = ikev2_generate_message (b0, sa, ike0, proposals, 0, 0);
4813 if (ikev2_natt_active (sa))
4814 len = ikev2_insert_non_esp_marker (ike0, len);
4815 ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len,
4816 ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index);
4817 vec_free (proposals);
4821 ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
4824 ikev2_main_t *km = &ikev2_main;
4825 ikev2_main_per_thread_data_t *tkm;
4826 ikev2_sa_t *fsa = 0;
4827 ikev2_child_sa_t *fchild = 0;
4829 /* Search for the child SA */
4830 vec_foreach (tkm, km->per_thread_data)
4836 pool_foreach (sa, tkm->sas) {
4837 fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
4847 if (!fchild || !fsa)
4849 r = clib_error_return (0, "Child SA not found");
4854 ikev2_rekey_child_sa_internal (vm, fsa, fchild);
4861 ikev2_sa_sw_if_match (ikev2_sa_t * sa, u32 sw_if_index)
4863 return (sa->sw_if_index == sw_if_index) && sa->is_initiator;
4867 ikev2_sa_del (ikev2_profile_t * p, u32 sw_if_index)
4869 u64 *ispi, *ispi_vec = 0;
4870 ikev2_sa_t *sa, **sap, **sa_vec = 0;
4871 ikev2_main_t *km = &ikev2_main;
4872 ikev2_main_per_thread_data_t *tkm;
4873 p->responder.sw_if_index = ~0;
4875 vec_foreach (tkm, km->per_thread_data)
4878 pool_foreach (sa, tkm->sas) {
4879 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4880 vec_add1 (sa_vec, sa);
4884 vec_foreach (sap, sa_vec)
4886 ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, *sap, 0);
4888 vec_reset_length (sa_vec);
4893 pool_foreach (sa, km->sais) {
4894 if (ikev2_sa_sw_if_match (sa, sw_if_index))
4895 vec_add1 (ispi_vec, sa->ispi);
4899 vec_foreach (ispi, ispi_vec)
4901 ikev2_del_sa_init_from_main (ispi);
4904 vec_free (ispi_vec);
4907 static clib_error_t *
4908 ikev2_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
4910 ikev2_main_t *km = &ikev2_main;
4917 pool_foreach (p, km->profiles) {
4918 if (p->responder.sw_if_index == sw_if_index)
4919 ikev2_sa_del (p, sw_if_index);
4926 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ikev2_sw_interface_add_del);
4929 ikev2_init (vlib_main_t * vm)
4931 ikev2_main_t *km = &ikev2_main;
4933 clib_memset (km, 0, sizeof (ikev2_main_t));
4935 km->log_level = IKEV2_LOG_ERROR;
4936 km->log_class = vlib_log_register_class ("ikev2", 0);
4938 km->vnet_main = vnet_get_main ();
4941 km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
4942 km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
4948 VLIB_INIT_FUNCTION (ikev2_init) = {
4949 .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init"),
4954 ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa,
4957 ikev2_main_t *km = &ikev2_main;
4958 ikev2_profile_t *p = 0;
4959 vlib_main_t *vm = km->vlib_main;
4960 f64 now = vlib_time_now (vm);
4963 if (sa->profile_index != ~0)
4964 p = pool_elt_at_index (km->profiles, sa->profile_index);
4966 if (sa->is_initiator && p && csa->time_to_expiration
4967 && now > csa->time_to_expiration)
4969 if (!csa->is_expired || csa->rekey_retries > 0)
4971 ikev2_rekey_child_sa_internal (vm, sa, csa);
4972 csa->time_to_expiration = now + p->handover;
4973 csa->is_expired = 1;
4974 if (csa->rekey_retries == 0)
4976 csa->rekey_retries = 5;
4978 else if (csa->rekey_retries > 0)
4980 csa->rekey_retries--;
4981 ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d",
4982 csa->i_proposals->spi, csa->rekey_retries);
4983 if (csa->rekey_retries == 0)
4985 csa->rekey_retries = -1;
4992 csa->time_to_expiration = 0;
4993 ikev2_delete_child_sa_internal (vm, sa, csa);
5001 ipip_tunnel_t *ipip = NULL;
5002 u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0;
5003 if (~0 == sw_if_index)
5005 ip46_address_t local_ip;
5006 ip46_address_t remote_ip;
5007 if (sa->is_initiator)
5009 local_ip = to_ip46 (ip_addr_version (&sa->iaddr),
5010 ip_addr_bytes (&sa->iaddr));
5011 remote_ip = to_ip46 (ip_addr_version (&sa->raddr),
5012 ip_addr_bytes (&sa->raddr));
5016 local_ip = to_ip46 (ip_addr_version (&sa->raddr),
5017 ip_addr_bytes (&sa->raddr));
5018 remote_ip = to_ip46 (ip_addr_version (&sa->iaddr),
5019 ip_addr_bytes (&sa->iaddr));
5023 ipip_tunnel_key_t key = {
5026 .transport = IPIP_TRANSPORT_IP4,
5031 ipip = ipip_tunnel_db_find (&key);
5034 sw_if_index = ipip->sw_if_index;
5040 vec_add1 (sas_in, csa->remote_sa_id);
5041 vlib_worker_thread_barrier_sync (vm);
5042 int rv = ipsec_tun_protect_update (sw_if_index, NULL,
5043 csa->local_sa_id, sas_in);
5046 ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id));
5047 vlib_worker_thread_barrier_release (vm);
5054 ikev2_set_log_level (ikev2_log_level_t log_level)
5056 ikev2_main_t *km = &ikev2_main;
5058 if (log_level >= IKEV2_LOG_MAX)
5060 ikev2_log_error ("unknown logging level %d", log_level);
5064 km->log_level = log_level;
5069 ikev2_set_liveness_params (u32 period, u32 max_retries)
5071 ikev2_main_t *km = &ikev2_main;
5073 if (period == 0 || max_retries == 0)
5074 return clib_error_return (0, "invalid args");
5076 km->liveness_period = period;
5077 km->liveness_max_retries = max_retries;
5082 ikev2_profile_natt_disable (u8 * name)
5084 ikev2_profile_t *p = ikev2_profile_index_by_name (name);
5086 return clib_error_return (0, "unknown profile %v", name);
5088 p->natt_disabled = 1;
5093 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
5095 ikev2_main_t *km = &ikev2_main;
5096 vlib_main_t *vm = km->vlib_main;
5097 ikev2_main_per_thread_data_t *tkm;
5098 ikev2_sa_t *fsa = 0;
5099 ikev2_profile_t *p = 0;
5100 ikev2_child_sa_t *fchild = 0;
5101 f64 now = vlib_time_now (vm);
5102 vlib_counter_t counts;
5104 /* Search for the SA and child SA */
5105 vec_foreach (tkm, km->per_thread_data)
5111 pool_foreach (sa, tkm->sas) {
5112 fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
5121 vlib_get_combined_counter (&ipsec_sa_counters,
5122 ipsec_sa->stat_index, &counts);
5124 if (fsa && fsa->profile_index != ~0 && fsa->is_initiator)
5125 p = pool_elt_at_index (km->profiles, fsa->profile_index);
5127 if (fchild && p && p->lifetime_maxdata)
5129 if (!fchild->is_expired && counts.bytes > p->lifetime_maxdata)
5131 fchild->time_to_expiration = now;
5137 ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km,
5143 p = pool_elt_at_index (km->profiles, sa->profile_index);
5145 if (!p->responder.is_resolved)
5147 clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder);
5150 clib_error_free (r);
5154 if (!p->responder.is_resolved)
5157 ip_address_copy (&sa->raddr, &p->responder.addr);
5159 /* update nat detection destination hash */
5160 np = ikev2_find_ike_notify_payload (
5161 (ike_header_t *) sa->last_sa_init_req_packet_data,
5162 IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP);
5165 nat_sha = ikev2_compute_nat_sha1 (
5166 clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi),
5167 &sa->raddr, clib_host_to_net_u16 (sa->dst_port));
5168 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5173 if (ip_address_is_zero (&sa->iaddr))
5175 if (!ikev2_get_if_address (p->responder.sw_if_index,
5176 ip_addr_version (&p->responder.addr),
5180 /* update NAT detection payload */
5182 ikev2_find_ike_notify_payload
5183 ((ike_header_t *) sa->last_sa_init_req_packet_data,
5184 IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP);
5188 ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi),
5189 clib_host_to_net_u64 (sa->rspi),
5191 clib_host_to_net_u16 (IKEV2_PORT));
5192 clib_memcpy_fast (np, nat_sha, vec_len (nat_sha));
5197 if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
5200 vlib_buffer_t *b = vlib_get_buffer (km->vlib_main, bi0);
5201 clib_memcpy_fast (vlib_buffer_get_current (b),
5202 sa->last_sa_init_req_packet_data,
5203 vec_len (sa->last_sa_init_req_packet_data));
5205 ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
5206 vec_len (sa->last_sa_init_req_packet_data),
5207 ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index);
5211 ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km)
5218 hash_foreach (ispi, sai, km->sa_by_ispi,
5220 sa = pool_elt_at_index (km->sais, sai);
5221 if (sa->init_response_received)
5224 ikev2_process_pending_sa_init_one (vm, km, sa);
5230 ikev2_send_informational_request (ikev2_sa_t * sa)
5232 ikev2_main_t *km = &ikev2_main;
5233 ip_address_t *src, *dst;
5240 bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &b0);
5243 ikev2_log_error ("buffer alloc failure");
5247 ike0 = vlib_buffer_get_current (b0);
5248 ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
5249 ike0->ispi = clib_host_to_net_u64 (sa->ispi);
5250 ike0->rspi = clib_host_to_net_u64 (sa->rspi);
5251 ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id);
5253 sa->last_init_msg_id += 1;
5254 len = ikev2_generate_message (b0, sa, ike0, 0, 0, 0);
5258 if (ikev2_natt_active (sa))
5259 len = ikev2_insert_non_esp_marker (ike0, len);
5261 if (sa->is_initiator)
5272 dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa);
5273 ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp,
5278 ikev2_disable_dpd (void)
5280 ikev2_main_t *km = &ikev2_main;
5281 km->dpd_disabled = 1;
5285 ikev2_mngr_process_responder_sas (ikev2_sa_t *sa)
5287 ikev2_main_t *km = &ikev2_main;
5288 vlib_main_t *vm = km->vlib_main;
5290 if (!sa->keys_generated)
5293 if (sa->liveness_retries >= km->liveness_max_retries)
5296 f64 now = vlib_time_now (vm);
5298 if (sa->liveness_period_check < now)
5300 sa->liveness_retries++;
5301 sa->liveness_period_check = now + km->liveness_period;
5302 ikev2_send_informational_request (sa);
5308 ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
5311 ikev2_main_t *km = &ikev2_main;
5313 ikev2_child_sa_t *c;
5316 /* lazy init will wake it up */
5317 vlib_process_wait_for_event (vm);
5321 vlib_process_wait_for_event_or_clock (vm, 2);
5322 vlib_process_get_events (vm, NULL);
5324 /* process ike child sas */
5325 ikev2_main_per_thread_data_t *tkm;
5326 vec_foreach (tkm, km->per_thread_data)
5329 u32 *to_be_deleted = 0;
5332 pool_foreach (sa, tkm->sas) {
5333 ikev2_child_sa_t *c;
5336 if (sa->state != IKEV2_STATE_AUTHENTICATED)
5339 if (sa->old_remote_id_present && 0 > sa->old_id_expiration)
5341 sa->old_remote_id_present = 0;
5345 sa->old_id_expiration -= 1;
5347 vec_foreach (c, sa->childs)
5348 ikev2_mngr_process_child_sa(sa, c, del_old_ids);
5350 if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
5351 vec_add1 (to_be_deleted, sa - tkm->sas);
5355 vec_foreach (sai, to_be_deleted)
5357 sa = pool_elt_at_index (tkm->sas, sai[0]);
5358 const u32 profile_index = sa->profile_index;
5359 const int reinitiate = (sa->is_initiator && profile_index != ~0);
5360 vec_foreach (c, sa->childs)
5362 ikev2_delete_tunnel_interface (km->vnet_main, sa, c);
5363 ikev2_sa_del_child_sa (sa, c);
5365 ikev2_sa_free_all_vec (sa);
5366 hash_unset (tkm->sa_by_rspi, sa->rspi);
5367 pool_put (tkm->sas, sa);
5371 p = pool_elt_at_index (km->profiles, profile_index);
5374 clib_error_t *e = ikev2_initiate_sa_init (vm, p->name);
5377 ikev2_log_error ("%U", format_clib_error, e);
5378 clib_error_free (e);
5383 vec_free (to_be_deleted);
5386 /* process ipsec sas */
5389 pool_foreach (sa, ipsec_sa_pool)
5391 ikev2_mngr_process_ipsec_sa (sa);
5395 ikev2_process_pending_sa_init (vm, km);
5401 VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
5402 .function = ikev2_mngr_process_fn,
5403 .type = VLIB_NODE_TYPE_PROCESS,
5405 "ikev2-manager-process",
5409 ikev2_lazy_init (ikev2_main_t *km)
5411 vlib_thread_main_t *tm = vlib_get_thread_main ();
5414 if (km->lazy_init_done)
5417 ikev2_crypto_init (km);
5419 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
5421 vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1,
5422 CLIB_CACHE_LINE_BYTES);
5423 for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++)
5425 ikev2_main_per_thread_data_t *ptd =
5426 vec_elt_at_index (km->per_thread_data, thread_id);
5428 ptd->sa_by_rspi = hash_create (0, sizeof (uword));
5430 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
5431 ptd->evp_ctx = EVP_CIPHER_CTX_new ();
5432 ptd->hmac_ctx = HMAC_CTX_new ();
5434 EVP_CIPHER_CTX_init (&ptd->_evp_ctx);
5435 ptd->evp_ctx = &ptd->_evp_ctx;
5436 HMAC_CTX_init (&(ptd->_hmac_ctx));
5437 ptd->hmac_ctx = &ptd->_hmac_ctx;
5441 km->sa_by_ispi = hash_create (0, sizeof (uword));
5442 km->sw_if_indices = hash_create (0, 0);
5444 km->punt_hdl = vlib_punt_client_register ("ikev2");
5446 km->dns_resolve_name =
5447 vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name");
5448 if (!km->dns_resolve_name)
5449 ikev2_log_error ("cannot load symbols from dns plugin");
5451 /* wake up ikev2 process */
5452 vlib_process_signal_event (vlib_get_first_main (),
5453 ikev2_mngr_process_node.index, 0, 0);
5455 km->lazy_init_done = 1;
5458 VLIB_PLUGIN_REGISTER () = {
5459 .version = VPP_BUILD_VER,
5460 .description = "Internet Key Exchange (IKEv2) Protocol",
5465 * fd.io coding-style-patch-verification: ON
5468 * eval: (c-set-style "gnu")