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 <vnet/vnet.h>
18 #include <vnet/pg/pg.h>
19 #include <vppinfra/error.h>
20 #include <vnet/ip/udp.h>
21 #include <vnet/ipsec/ipsec.h>
22 #include <vnet/ipsec/ikev2.h>
23 #include <vnet/ipsec/ikev2_priv.h>
25 static int ikev2_delete_tunnel_interface(vnet_main_t * vnm,
27 ikev2_child_sa_t * child);
29 #define ikev2_set_state(sa, v) do { \
31 clib_warning("sa state changed to " #v); \
39 static u8 * format_ikev2_trace (u8 * s, va_list * args)
41 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
42 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
43 ikev2_trace_t * t = va_arg (*args, ikev2_trace_t *);
45 s = format (s, "ikev2: sw_if_index %d, next index %d",
46 t->sw_if_index, t->next_index);
50 vlib_node_registration_t ikev2_node;
52 #define foreach_ikev2_error \
53 _(PROCESSED, "IKEv2 packets processed") \
54 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
55 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
56 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
57 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
58 _(NOT_IKEV2, "Non IKEv2 packets received")
61 #define _(sym,str) IKEV2_ERROR_##sym,
67 static char * ikev2_error_strings[] = {
68 #define _(sym,string) string,
74 IKEV2_NEXT_IP4_LOOKUP,
75 IKEV2_NEXT_ERROR_DROP,
79 static ikev2_sa_transform_t *
80 ikev2_find_transform_data(ikev2_sa_transform_t * t)
82 ikev2_main_t * km = &ikev2_main;
83 ikev2_sa_transform_t * td;
85 vec_foreach(td, km->supported_transforms)
87 if (td->type != t->type)
90 if (td->transform_id != t->transform_id)
93 if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
95 if (vec_len(t->attrs) != 4 || t->attrs[0] != 0x80 || t->attrs[1] != 14)
98 if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
106 static ikev2_sa_proposal_t *
107 ikev2_select_proposal(ikev2_sa_proposal_t *proposals, ikev2_protocol_id_t prot_id)
109 ikev2_sa_proposal_t * rv = 0;
110 ikev2_sa_proposal_t * proposal;
111 ikev2_sa_transform_t * transform, * new_t;
112 u8 mandatory_bitmap, optional_bitmap;
114 if (prot_id == IKEV2_PROTOCOL_IKE)
116 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
117 (1 << IKEV2_TRANSFORM_TYPE_PRF) |
118 (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
119 (1 << IKEV2_TRANSFORM_TYPE_DH);
120 optional_bitmap = mandatory_bitmap;
122 else if (prot_id == IKEV2_PROTOCOL_ESP)
124 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
125 (1 << IKEV2_TRANSFORM_TYPE_ESN);
126 optional_bitmap = mandatory_bitmap |
127 (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
128 (1 << IKEV2_TRANSFORM_TYPE_DH);
130 else if (prot_id == IKEV2_PROTOCOL_AH)
132 mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
133 (1 << IKEV2_TRANSFORM_TYPE_ESN);
134 optional_bitmap = mandatory_bitmap |
135 (1 << IKEV2_TRANSFORM_TYPE_DH);
140 vec_add2(rv, proposal, 1);
142 vec_foreach(proposal, proposals)
145 if (proposal->protocol_id != prot_id)
148 vec_foreach(transform, proposal->transforms)
150 if ((1 << transform->type) & bitmap)
153 if (ikev2_find_transform_data(transform))
155 bitmap |= 1 << transform->type;
156 vec_add2(rv->transforms, new_t, 1);
157 memcpy(new_t, transform, sizeof(*new_t));
158 new_t->attrs = vec_dup(transform->attrs);
162 clib_warning("bitmap is %x mandatory is %x optional is %x",
163 bitmap, mandatory_bitmap, optional_bitmap);
165 if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
166 (bitmap & ~optional_bitmap) == 0)
168 rv->proposal_num = proposal->proposal_num;
169 rv->protocol_id = proposal->protocol_id;
170 RAND_bytes((u8 *) &rv->spi, sizeof(rv->spi));
175 vec_free(rv->transforms);
184 ikev2_sa_transform_t *
185 ikev2_sa_get_td_for_type(ikev2_sa_proposal_t * p, ikev2_transform_type_t type)
187 ikev2_sa_transform_t * t;
192 vec_foreach(t, p->transforms)
195 return ikev2_find_transform_data(t);
201 ikev2_sa_get_child(ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id)
203 ikev2_child_sa_t * c;
204 vec_foreach(c, sa->childs)
206 if (c->i_proposals[0].spi == spi && c->i_proposals[0].protocol_id == prot_id)
214 ikev2_sa_free_proposal_vector(ikev2_sa_proposal_t ** v)
216 ikev2_sa_proposal_t * p;
217 ikev2_sa_transform_t * t;
223 vec_foreach(t, p->transforms) {
226 vec_free(p->transforms);
232 ikev2_sa_free_all_child_sa(ikev2_child_sa_t ** childs)
234 ikev2_child_sa_t * c;
235 vec_foreach(c, *childs)
237 ikev2_sa_free_proposal_vector(&c->r_proposals);
238 ikev2_sa_free_proposal_vector(&c->i_proposals);
249 ikev2_sa_del_child_sa(ikev2_sa_t * sa, ikev2_child_sa_t * child)
251 ikev2_sa_free_proposal_vector(&child->r_proposals);
252 ikev2_sa_free_proposal_vector(&child->i_proposals);
253 vec_free(child->sk_ai);
254 vec_free(child->sk_ar);
255 vec_free(child->sk_ei);
256 vec_free(child->sk_er);
258 vec_del1(sa->childs, child - sa->childs);
262 ikev2_sa_free_all_vec(ikev2_sa_t *sa)
264 vec_free(sa->i_nonce);
265 vec_free(sa->i_dh_data);
266 vec_free(sa->dh_shared_key);
268 ikev2_sa_free_proposal_vector(&sa->r_proposals);
269 ikev2_sa_free_proposal_vector(&sa->i_proposals);
279 vec_free(sa->i_id.data);
280 vec_free(sa->i_auth.data);
281 vec_free(sa->r_id.data);
282 vec_free(sa->r_auth.data);
284 EVP_PKEY_free(sa->r_auth.key);
288 ikev2_sa_free_all_child_sa(&sa->childs);
292 ikev2_delete_sa(ikev2_sa_t *sa)
294 ikev2_main_t * km = &ikev2_main;
297 ikev2_sa_free_all_vec(sa);
299 p = hash_get(km->sa_by_rspi, sa->rspi);
302 hash_unset(km->sa_by_rspi, sa->rspi);
303 pool_put(km->sas, sa);
308 ikev2_generate_sa_init_data(ikev2_sa_t *sa)
310 ikev2_sa_transform_t * t = 0, * t2;
311 ikev2_main_t * km = &ikev2_main;
313 if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
318 /* check if received DH group is on our list of supported groups */
319 vec_foreach(t2, km->supported_transforms)
321 if (t2->type == IKEV2_TRANSFORM_TYPE_DH &&
322 sa->dh_group == t2->dh_type)
331 clib_warning("unknown dh data group %u (data len %u)", sa->dh_group,
332 vec_len(sa->i_dh_data));
333 sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
338 RAND_bytes((u8 *) &sa->rspi, 8);
341 sa->r_nonce = vec_new(u8, IKEV2_NONCE_SIZE);
342 RAND_bytes((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
344 /* generate dh keys */
345 ikev2_generate_dh(sa, t);
349 ikev2_calc_keys(ikev2_sa_t *sa)
352 /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
355 ikev2_sa_transform_t * tr_encr, * tr_prf, * tr_integ;
356 tr_encr = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
357 tr_prf = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
358 tr_integ = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
360 vec_append(s, sa->i_nonce);
361 vec_append(s, sa->r_nonce);
362 skeyseed = ikev2_calc_prf(tr_prf, s, sa->dh_shared_key);
364 /* Calculate S = Ni | Nr | SPIi | SPIr*/
366 vec_add2(s, tmp, 2 * sizeof(*spi));
368 spi[0] = clib_host_to_net_u64(sa->ispi);
369 spi[1] = clib_host_to_net_u64(sa->rspi);
371 /* calculate PRFplus */
373 int len = tr_prf->key_trunc + /* SK_d */
374 tr_integ->key_len * 2 + /* SK_ai, SK_ar */
375 tr_encr->key_len * 2 + /* SK_ei, SK_er */
376 tr_prf->key_len * 2 ; /* SK_pi, SK_pr */
378 keymat = ikev2_calc_prfplus(tr_prf, skeyseed, s, len);
385 sa->sk_d = vec_new(u8, tr_prf->key_trunc);
386 memcpy(sa->sk_d, keymat + pos, tr_prf->key_trunc);
387 pos += tr_prf->key_trunc;
390 sa->sk_ai = vec_new(u8, tr_integ->key_len);
391 memcpy(sa->sk_ai, keymat + pos, tr_integ->key_len);
392 pos += tr_integ->key_len;
395 sa->sk_ar = vec_new(u8, tr_integ->key_len);
396 memcpy(sa->sk_ar, keymat + pos, tr_integ->key_len);
397 pos += tr_integ->key_len;
400 sa->sk_ei = vec_new(u8, tr_encr->key_len);
401 memcpy(sa->sk_ei, keymat + pos, tr_encr->key_len);
402 pos += tr_encr->key_len;
405 sa->sk_er = vec_new(u8, tr_encr->key_len);
406 memcpy(sa->sk_er, keymat + pos, tr_encr->key_len);
407 pos += tr_encr->key_len;
410 sa->sk_pi = vec_new(u8, tr_prf->key_len);
411 memcpy(sa->sk_pi, keymat + pos, tr_prf->key_len);
412 pos += tr_prf->key_len;
415 sa->sk_pr = vec_new(u8, tr_prf->key_len);
416 memcpy(sa->sk_pr, keymat + pos, tr_prf->key_len);
417 pos += tr_prf->key_len;
423 ikev2_calc_child_keys(ikev2_sa_t *sa, ikev2_child_sa_t * child)
426 ikev2_sa_transform_t * tr_prf, * ctr_encr, * ctr_integ;
427 tr_prf = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
428 ctr_encr = ikev2_sa_get_td_for_type(child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
429 ctr_integ = ikev2_sa_get_td_for_type(child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
431 vec_append(s, sa->i_nonce);
432 vec_append(s, sa->r_nonce);
433 /* calculate PRFplus */
435 int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
437 keymat = ikev2_calc_prfplus(tr_prf, sa->sk_d, s, len);
442 child->sk_ei = vec_new(u8, ctr_encr->key_len);
443 memcpy(child->sk_ei, keymat + pos, ctr_encr->key_len);
444 pos += ctr_encr->key_len;
447 child->sk_ai = vec_new(u8, ctr_integ->key_len);
448 memcpy(child->sk_ai, keymat + pos, ctr_integ->key_len);
449 pos += ctr_integ->key_len;
452 child->sk_er = vec_new(u8, ctr_encr->key_len);
453 memcpy(child->sk_er, keymat + pos, ctr_encr->key_len);
454 pos += ctr_encr->key_len;
457 child->sk_ar = vec_new(u8, ctr_integ->key_len);
458 memcpy(child->sk_ar, keymat + pos, ctr_integ->key_len);
459 pos += ctr_integ->key_len;
467 ikev2_process_sa_init_req(vlib_main_t * vm, ikev2_sa_t *sa, ike_header_t * ike)
470 u32 len = clib_net_to_host_u32(ike->length);
471 u8 payload = ike->nextpayload;
473 clib_warning("ispi %lx rspi %lx nextpayload %x version %x "
474 "exchange %x flags %x msgid %x length %u",
475 clib_net_to_host_u64(ike->ispi),
476 clib_net_to_host_u64(ike->rspi),
477 payload, ike->version,
478 ike->exchange, ike->flags,
479 clib_net_to_host_u32(ike->msgid),
482 sa->ispi = clib_net_to_host_u64(ike->ispi);
484 /* store whole IKE payload - needed for PSK auth */
485 vec_free(sa->last_sa_init_req_packet_data);
486 vec_add(sa->last_sa_init_req_packet_data, ike, len);
488 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
489 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
490 u32 plen = clib_net_to_host_u16(ikep->length);
492 if (plen < sizeof(ike_payload_header_t))
495 if (payload == IKEV2_PAYLOAD_SA)
497 ikev2_sa_free_proposal_vector(&sa->i_proposals);
498 sa->i_proposals = ikev2_parse_sa_payload(ikep);
500 else if (payload == IKEV2_PAYLOAD_KE)
502 ike_ke_payload_header_t * ke = (ike_ke_payload_header_t *) ikep;
503 sa->dh_group = clib_net_to_host_u16(ke->dh_group);
504 vec_free(sa->i_dh_data);
505 vec_add(sa->i_dh_data, ke->payload, plen - sizeof(*ke));
507 else if (payload == IKEV2_PAYLOAD_NONCE)
509 vec_free(sa->i_nonce);
510 vec_add(sa->i_nonce, ikep->payload, plen - sizeof(*ikep));
512 else if (payload == IKEV2_PAYLOAD_NOTIFY)
514 ikev2_notify_t * n = ikev2_parse_notify_payload(ikep);
517 else if (payload == IKEV2_PAYLOAD_VENDOR)
519 ikev2_parse_vendor_payload(ikep);
523 clib_warning("unknown payload %u flags %x length %u", payload, ikep->flags, plen);
524 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) {
525 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
526 sa->unsupported_cp = payload;
531 payload = ikep->nextpayload;
535 ikev2_set_state(sa, IKEV2_STATE_SA_INIT);
539 ikev2_decrypt_sk_payload(ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
544 u32 len = clib_net_to_host_u32(ike->length);
545 ike_payload_header_t * ikep;
547 ikev2_sa_transform_t * tr_integ;
548 tr_integ = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
551 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
553 ikep = (ike_payload_header_t *) &ike->payload[p];
554 plen = clib_net_to_host_u16(ikep->length);
556 if (plen < sizeof(*ikep))
559 if (*payload == IKEV2_PAYLOAD_SK)
561 clib_warning("received IKEv2 payload SK, len %u", plen - 4);
562 last_payload = *payload;
566 clib_warning("unknown payload %u flags %x length %u", payload, ikep->flags, plen);
567 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
569 sa->unsupported_cp = *payload;
574 *payload = ikep->nextpayload;
578 if (last_payload != IKEV2_PAYLOAD_SK) {
579 clib_warning("Last payload must be SK");
583 hmac = ikev2_calc_integr(tr_integ, sa->sk_ai, (u8 *) ike,
584 len - tr_integ->key_trunc);
586 plen = plen - sizeof(*ikep) - tr_integ->key_trunc;
588 if (memcmp(hmac, &ikep->payload[plen], tr_integ->key_trunc))
590 clib_warning("message integrity check failed");
596 return ikev2_decrypt_data(sa, ikep->payload, plen);
600 ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
602 ikev2_main_t * km = &ikev2_main;
605 ikev2_child_sa_t * c;
607 if (!sa->initial_contact)
610 /* find old IKE SAs with the same authenticated identity */
611 pool_foreach (tmp, km->sas, ({
612 if (tmp->i_id.type != sa->i_id.type ||
613 vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
614 memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
617 if (sa->rspi != tmp->rspi)
618 vec_add1(delete, tmp - km->sas);
621 for (i = 0; i < vec_len(delete); i++)
623 tmp = pool_elt_at_index(km->sas, delete[i]);
624 vec_foreach(c, tmp->childs)
625 ikev2_delete_tunnel_interface(km->vnet_main, tmp, c);
626 ikev2_delete_sa(tmp);
630 sa->initial_contact = 0;
634 ikev2_process_auth_req(vlib_main_t * vm, ikev2_sa_t *sa, ike_header_t * ike)
636 ikev2_child_sa_t * first_child_sa;
638 u32 len = clib_net_to_host_u32(ike->length);
639 u8 payload = ike->nextpayload;
642 ike_payload_header_t * ikep;
645 clib_warning("ispi %lx rspi %lx nextpayload %x version %x "
646 "exchange %x flags %x msgid %x length %u",
647 clib_net_to_host_u64(ike->ispi),
648 clib_net_to_host_u64(ike->rspi),
649 payload, ike->version,
650 ike->exchange, ike->flags,
651 clib_net_to_host_u32(ike->msgid),
656 plaintext = ikev2_decrypt_sk_payload(sa, ike, &payload);
660 if (sa->unsupported_cp)
661 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
662 goto cleanup_and_exit;
665 /* create 1st child SA */
666 ikev2_sa_free_all_child_sa(&sa->childs);
667 vec_add2(sa->childs, first_child_sa, 1);
670 /* process encrypted payload */
672 while (p < vec_len(plaintext) && payload != IKEV2_PAYLOAD_NONE)
674 ikep = (ike_payload_header_t *) &plaintext[p];
675 plen = clib_net_to_host_u16(ikep->length);
677 if (plen < sizeof(ike_payload_header_t))
678 goto cleanup_and_exit;
680 if (payload == IKEV2_PAYLOAD_SA) /* 33 */
682 clib_warning("received payload SA, len %u", plen - sizeof(*ikep));
683 ikev2_sa_free_proposal_vector(&first_child_sa->i_proposals);
684 first_child_sa->i_proposals = ikev2_parse_sa_payload(ikep);
686 else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
688 ike_id_payload_header_t * id = (ike_id_payload_header_t *) ikep;
690 sa->i_id.type = id->id_type;
691 vec_free(sa->i_id.data);
692 vec_add(sa->i_id.data, id->payload, plen - sizeof(*id));
694 clib_warning("received payload IDi, len %u id_type %u",
695 plen - sizeof(*id), id->id_type);
697 else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
699 ike_auth_payload_header_t * a = (ike_auth_payload_header_t *) ikep;
701 sa->i_auth.method = a->auth_method;
702 vec_free(sa->i_auth.data);
703 vec_add(sa->i_auth.data, a->payload, plen - sizeof(*a));
705 clib_warning("received payload AUTH, len %u auth_type %u",
706 plen - sizeof(*a), a->auth_method);
708 else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
710 ikev2_notify_t * n = ikev2_parse_notify_payload(ikep);
711 if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
713 sa->initial_contact = 1;
717 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
719 ikev2_parse_vendor_payload(ikep);
721 else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
723 clib_warning("received payload TSi, len %u", plen - sizeof(*ikep));
725 vec_free(first_child_sa->tsi);
726 first_child_sa->tsi = ikev2_parse_ts_payload(ikep);
728 else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
730 clib_warning("received payload TSr, len %u", plen - sizeof(*ikep));
732 vec_free(first_child_sa->tsr);
733 first_child_sa->tsr = ikev2_parse_ts_payload(ikep);
737 clib_warning("unknown payload %u flags %x length %u data %u",
738 payload, ikep->flags, plen - 4,
739 format_hex_bytes, ikep->payload, plen - 4);
741 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) {
742 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
743 sa->unsupported_cp = payload;
748 payload = ikep->nextpayload;
757 ikev2_process_informational_req(vlib_main_t * vm, ikev2_sa_t *sa, ike_header_t * ike)
760 u32 len = clib_net_to_host_u32(ike->length);
761 u8 payload = ike->nextpayload;
764 ike_payload_header_t * ikep;
767 clib_warning("ispi %lx rspi %lx nextpayload %x version %x "
768 "exchange %x flags %x msgid %x length %u",
769 clib_net_to_host_u64(ike->ispi),
770 clib_net_to_host_u64(ike->rspi),
771 payload, ike->version,
772 ike->exchange, ike->flags,
773 clib_net_to_host_u32(ike->msgid),
776 plaintext = ikev2_decrypt_sk_payload(sa, ike, &payload);
779 goto cleanup_and_exit;
781 /* process encrypted payload */
783 while (p < vec_len(plaintext) && payload != IKEV2_PAYLOAD_NONE)
785 ikep = (ike_payload_header_t *) &plaintext[p];
786 plen = clib_net_to_host_u16(ikep->length);
788 if (plen < sizeof(ike_payload_header_t))
789 goto cleanup_and_exit;
791 if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
793 ikev2_notify_t * n = ikev2_parse_notify_payload(ikep);
794 if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
795 ikev2_set_state(sa, IKEV2_STATE_AUTH_FAILED);
798 else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
800 sa->del = ikev2_parse_delete_payload(ikep);
802 else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
804 ikev2_parse_vendor_payload(ikep);
808 clib_warning("unknown payload %u flags %x length %u data %u",
809 payload, ikep->flags, plen - 4,
810 format_hex_bytes, ikep->payload, plen - 4);
812 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) {
813 sa->unsupported_cp = payload;
818 payload = ikep->nextpayload;
827 ikev2_process_create_child_sa_req(vlib_main_t * vm, ikev2_sa_t *sa, ike_header_t * ike)
830 u32 len = clib_net_to_host_u32(ike->length);
831 u8 payload = ike->nextpayload;
834 u8 i_nonce[IKEV2_NONCE_SIZE];
836 ike_payload_header_t * ikep;
838 ikev2_notify_t * n = 0;
839 ikev2_ts_t * tsi = 0;
840 ikev2_ts_t * tsr = 0;
841 ikev2_sa_proposal_t * proposal = 0;
842 ikev2_child_sa_t * child_sa;
844 clib_warning("ispi %lx rspi %lx nextpayload %x version %x "
845 "exchange %x flags %x msgid %x length %u",
846 clib_net_to_host_u64(ike->ispi),
847 clib_net_to_host_u64(ike->rspi),
848 payload, ike->version,
849 ike->exchange, ike->flags,
850 clib_net_to_host_u32(ike->msgid),
853 plaintext = ikev2_decrypt_sk_payload(sa, ike, &payload);
856 goto cleanup_and_exit;
858 /* process encrypted payload */
860 while (p < vec_len(plaintext) && payload != IKEV2_PAYLOAD_NONE)
862 ikep = (ike_payload_header_t *) &plaintext[p];
863 plen = clib_net_to_host_u16(ikep->length);
865 if (plen < sizeof(ike_payload_header_t))
866 goto cleanup_and_exit;
868 else if (payload == IKEV2_PAYLOAD_SA)
870 proposal = ikev2_parse_sa_payload(ikep);
872 else if (payload == IKEV2_PAYLOAD_NOTIFY)
874 n = ikev2_parse_notify_payload(ikep);
875 if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
880 else if (payload == IKEV2_PAYLOAD_DELETE)
882 sa->del = ikev2_parse_delete_payload(ikep);
884 else if (payload == IKEV2_PAYLOAD_VENDOR)
886 ikev2_parse_vendor_payload(ikep);
888 else if (payload == IKEV2_PAYLOAD_NONCE)
890 memcpy(i_nonce, ikep->payload, plen - sizeof(*ikep));
892 else if (payload == IKEV2_PAYLOAD_TSI)
894 tsi = ikev2_parse_ts_payload(ikep);
896 else if (payload == IKEV2_PAYLOAD_TSR)
898 tsr = ikev2_parse_ts_payload(ikep);
902 clib_warning("unknown payload %u flags %x length %u data %u",
903 payload, ikep->flags, plen - 4,
904 format_hex_bytes, ikep->payload, plen - 4);
906 if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) {
907 sa->unsupported_cp = payload;
912 payload = ikep->nextpayload;
918 ikev2_rekey_t * rekey;
919 child_sa = ikev2_sa_get_child(sa, n->spi, n->protocol_id);
922 clib_warning("child SA spi %lx not found", n->spi);
923 goto cleanup_and_exit;
925 vec_add2(sa->rekey, rekey, 1);
926 rekey->protocol_id = n->protocol_id;
928 rekey->i_proposal = proposal;
929 rekey->r_proposal = ikev2_select_proposal(proposal, IKEV2_PROTOCOL_ESP);
933 vec_free(sa->i_nonce);
934 vec_add(sa->i_nonce, i_nonce, IKEV2_NONCE_SIZE);
935 /* generate new Nr */
936 vec_free(sa->r_nonce);
937 sa->r_nonce = vec_new(u8, IKEV2_NONCE_SIZE);
938 RAND_bytes((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
947 ikev2_sa_generate_authmsg(ikev2_sa_t *sa, int is_responder)
955 ikev2_sa_transform_t * tr_prf;
957 tr_prf = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
964 packet_data = sa->last_sa_init_res_packet_data;
971 packet_data = sa->last_sa_init_req_packet_data;
974 data = vec_new(u8, 4);
976 vec_append(data, id->data);
978 u8 * id_hash = ikev2_calc_prf(tr_prf, key, data);
979 vec_append(authmsg, packet_data);
980 vec_append(authmsg, nonce);
981 vec_append(authmsg, id_hash);
989 ikev2_ts_cmp(ikev2_ts_t * ts1, ikev2_ts_t * ts2)
991 if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
992 ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
993 ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
994 ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1001 ikev2_sa_match_ts(ikev2_sa_t *sa)
1003 ikev2_main_t * km = &ikev2_main;
1004 ikev2_profile_t * p;
1005 ikev2_ts_t * ts, * tsi = 0, * tsr = 0;
1007 pool_foreach (p, km->profiles, ({
1010 if (p->rem_id.type != sa->i_id.type ||
1011 vec_len(p->rem_id.data) != vec_len(sa->i_id.data) ||
1012 memcmp(p->rem_id.data, sa->i_id.data, vec_len(p->rem_id.data)))
1015 vec_foreach(ts, sa->childs[0].tsi)
1017 if (ikev2_ts_cmp(&p->rem_ts, ts))
1024 vec_foreach(ts, sa->childs[0].tsr)
1026 if (ikev2_ts_cmp(&p->loc_ts, ts))
1038 vec_free(sa->childs[0].tsi);
1039 vec_free(sa->childs[0].tsr);
1040 sa->childs[0].tsi = tsi;
1041 sa->childs[0].tsr = tsr;
1047 ikev2_set_state(sa, IKEV2_STATE_TS_UNACCEPTABLE);
1052 ikev2_sa_auth(ikev2_sa_t *sa)
1054 ikev2_main_t * km = &ikev2_main;
1055 ikev2_profile_t * p, * sel_p = 0;
1056 u8 * authmsg, * key_pad, * psk = 0, * auth = 0;
1057 ikev2_sa_transform_t * tr_prf;
1059 tr_prf = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1061 /* only shared key and rsa signature */
1062 if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1063 sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1065 clib_warning("unsupported authentication method %u", sa->i_auth.method);
1066 ikev2_set_state(sa, IKEV2_STATE_AUTH_FAILED);
1070 key_pad = format(0, "%s", IKEV2_KEY_PAD);
1071 authmsg = ikev2_sa_generate_authmsg(sa, 0);
1073 pool_foreach (p, km->profiles, ({
1076 if (p->rem_id.type != sa->i_id.type ||
1077 vec_len(p->rem_id.data) != vec_len(sa->i_id.data) ||
1078 memcmp(p->rem_id.data, sa->i_id.data, vec_len(p->rem_id.data)))
1081 if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1083 if (!p->auth.data ||
1084 p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1087 psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1088 auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1090 if (!memcmp(auth, sa->i_auth.data, vec_len(sa->i_auth.data)))
1092 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1099 else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1101 if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1104 if (ikev2_verify_sign(p->auth.key, sa->i_auth.data, authmsg) == 1)
1106 ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1118 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1120 vec_free(sa->r_id.data);
1121 sa->r_id.data = vec_dup(sel_p->loc_id.data);
1122 sa->r_id.type = sel_p->loc_id.type;
1124 /* generate our auth data */
1125 authmsg = ikev2_sa_generate_authmsg(sa, 1);
1126 if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1128 sa->r_auth.data = ikev2_calc_prf(tr_prf, psk, authmsg);
1129 sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1131 else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1133 sa->r_auth.data = ikev2_calc_sign(km->pkey, authmsg);
1134 sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1138 /* select transforms for 1st child sa */
1139 ikev2_sa_free_proposal_vector(&sa->childs[0].r_proposals);
1140 sa->childs[0].r_proposals = ikev2_select_proposal(sa->childs[0].i_proposals,
1141 IKEV2_PROTOCOL_ESP);
1145 ikev2_set_state(sa, IKEV2_STATE_AUTH_FAILED);
1152 ikev2_create_tunnel_interface(vnet_main_t * vnm, ikev2_sa_t *sa, ikev2_child_sa_t * child)
1154 ipsec_add_del_tunnel_args_t a;
1155 ikev2_sa_transform_t * tr;
1159 if (!child->r_proposals)
1161 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1166 a.local_ip.as_u32 = sa->raddr.as_u32;
1167 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1168 a.local_spi = child->i_proposals[0].spi;
1169 a.remote_spi = child->r_proposals[0].spi;
1172 tr = ikev2_sa_get_td_for_type(child->r_proposals, IKEV2_TRANSFORM_TYPE_ESN);
1174 a.esn = tr->esn_type;
1178 tr = ikev2_sa_get_td_for_type(child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1181 if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1183 switch (tr->key_len)
1186 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1189 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1192 encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1195 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1202 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1208 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1212 tr = ikev2_sa_get_td_for_type(child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1215 if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1217 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1223 ikev2_set_state(sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
1227 hw_if_index = ipsec_add_del_tunnel_if(vnm, &a);
1228 if (hw_if_index == VNET_API_ERROR_INVALID_VALUE)
1230 clib_warning("create tunnel interface failed remote-ip %U remote-spi %u",
1231 format_ip4_address, &sa->raddr, child->r_proposals[0].spi);
1232 ikev2_set_state(sa, IKEV2_STATE_DELETED);
1236 ikev2_calc_child_keys(sa, child);
1238 ipsec_set_interface_key(vnm, hw_if_index,
1239 IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO,
1243 ipsec_set_interface_key(vnm, hw_if_index,
1244 IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO,
1248 ipsec_set_interface_key(vnm, hw_if_index,
1249 IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG,
1250 IPSEC_INTEG_ALG_SHA1_96,
1253 ipsec_set_interface_key(vnm, hw_if_index,
1254 IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG,
1255 IPSEC_INTEG_ALG_SHA1_96,
1262 ikev2_delete_tunnel_interface(vnet_main_t * vnm, ikev2_sa_t *sa, ikev2_child_sa_t * child)
1264 ipsec_add_del_tunnel_args_t a;
1266 if (!vec_len(child->r_proposals))
1270 a.local_ip.as_u32 = sa->raddr.as_u32;
1271 a.remote_ip.as_u32 = sa->iaddr.as_u32;
1272 a.local_spi = child->i_proposals[0].spi;
1273 a.remote_spi = child->r_proposals[0].spi;
1275 return ipsec_add_del_tunnel_if(vnm, &a);
1279 ikev2_generate_resp(ikev2_sa_t *sa, ike_header_t * ike)
1282 ike_payload_header_t * ph;
1286 ikev2_sa_transform_t * tr_encr, *tr_integ;
1287 tr_encr = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1288 tr_integ = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1290 ikev2_payload_chain_t * chain = 0;
1291 ikev2_payload_new_chain(chain);
1293 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1295 if (sa->r_proposals == 0)
1297 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1298 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1300 else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1302 u8 * data = vec_new(u8, 2);
1303 ikev2_sa_transform_t * tr_dh;
1304 tr_dh = ikev2_sa_get_td_for_type(sa->r_proposals, IKEV2_TRANSFORM_TYPE_DH);
1305 ASSERT(tr_dh && tr_dh->dh_type);
1307 data[0] = (tr_dh->dh_type >> 8) & 0xff;
1308 data[1] = (tr_dh->dh_type) & 0xff;
1310 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD, data);
1312 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1314 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1316 u8 * data = vec_new(u8, 1);
1318 data[0] = sa->unsupported_cp;
1319 ikev2_payload_add_notify(chain,
1320 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1326 ike->rspi = clib_host_to_net_u64(sa->rspi);
1327 ikev2_payload_add_sa(chain, sa->r_proposals);
1328 ikev2_payload_add_ke(chain, sa->dh_group, sa->r_dh_data);
1329 ikev2_payload_add_nonce(chain, sa->r_nonce);
1332 else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1334 if (sa->state == IKEV2_STATE_AUTHENTICATED)
1336 ikev2_payload_add_id(chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1337 ikev2_payload_add_auth(chain, &sa->r_auth);
1338 ikev2_payload_add_sa(chain, sa->childs[0].r_proposals);
1339 ikev2_payload_add_ts(chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1340 ikev2_payload_add_ts(chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1342 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1344 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED, 0);
1345 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1347 else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1349 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE, 0);
1350 ikev2_payload_add_id(chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1351 ikev2_payload_add_auth(chain, &sa->r_auth);
1353 else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1355 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1356 ikev2_payload_add_id(chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
1357 ikev2_payload_add_auth(chain, &sa->r_auth);
1358 ikev2_payload_add_ts(chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
1359 ikev2_payload_add_ts(chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
1361 else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1363 u8 * data = vec_new(u8, 1);
1365 data[0] = sa->unsupported_cp;
1366 ikev2_payload_add_notify(chain,
1367 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1373 ikev2_set_state(sa, IKEV2_STATE_DELETED);
1377 else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1379 /* if pending delete */
1382 /* The response to a request that deletes the IKE SA is an empty
1383 INFORMATIONAL response. */
1384 if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1386 ikev2_set_state(sa, IKEV2_STATE_NOTIFY_AND_DELETE);
1388 /* The response to a request that deletes ESP or AH SAs will contain
1389 delete payloads for the paired SAs going in the other direction. */
1392 ikev2_payload_add_delete(chain, sa->del);
1397 /* received N(AUTHENTICATION_FAILED) */
1398 else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1400 ikev2_set_state(sa, IKEV2_STATE_DELETED);
1403 /* received unsupported critical payload */
1404 else if (sa->unsupported_cp)
1406 u8 * data = vec_new(u8, 1);
1408 data[0] = sa->unsupported_cp;
1409 ikev2_payload_add_notify(chain,
1410 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1413 sa->unsupported_cp = 0;
1415 /* else send empty response */
1417 else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1421 ikev2_payload_add_sa(chain, sa->rekey[0].r_proposal);
1422 ikev2_payload_add_nonce(chain, sa->r_nonce);
1423 ikev2_payload_add_ts(chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI);
1424 ikev2_payload_add_ts(chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR);
1425 vec_del1(sa->rekey, 0);
1427 else if (sa->unsupported_cp)
1429 u8 * data = vec_new(u8, 1);
1431 data[0] = sa->unsupported_cp;
1432 ikev2_payload_add_notify(chain,
1433 IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1436 sa->unsupported_cp = 0;
1440 ikev2_payload_add_notify(chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS, 0);
1445 ike->version = IKE_VERSION_2;
1446 ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1447 ike->nextpayload = IKEV2_PAYLOAD_SK;
1448 tlen = sizeof(*ike);
1451 if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1453 tlen += vec_len(chain->data);
1454 ike->nextpayload = chain->first_payload_type;
1455 ike->length = clib_host_to_net_u32(tlen);
1456 memcpy(ike->payload, chain->data, vec_len(chain->data));
1458 /* store whole IKE payload - needed for PSK auth */
1459 vec_free(sa->last_sa_init_res_packet_data);
1460 vec_add(sa->last_sa_init_res_packet_data, ike, tlen);
1465 ikev2_payload_chain_add_padding(chain, tr_encr->block_size);
1469 ph = (ike_payload_header_t *) &ike->payload[0];
1470 ph->nextpayload = chain->first_payload_type;
1472 int enc_len = ikev2_encrypt_data(sa, chain->data, ph->payload);
1475 /* add space for hmac */
1476 plen += tr_integ->key_trunc;
1479 /* payload and total length */
1480 ph->length = clib_host_to_net_u16(plen);
1481 ike->length = clib_host_to_net_u32(tlen);
1483 /* calc integrity data for whole packet except hash itself */
1484 integ = ikev2_calc_integr(tr_integ, sa->sk_ar, (u8 *) ike,
1485 tlen - tr_integ->key_trunc);
1487 memcpy(ike->payload + tlen - tr_integ->key_trunc - sizeof(*ike),
1488 integ, tr_integ->key_trunc);
1490 /* store whole IKE payload - needed for retransmit */
1491 vec_free(sa->last_res_packet_data);
1492 vec_add(sa->last_res_packet_data, ike, tlen);
1496 ikev2_payload_destroy_chain (chain);
1502 ikev2_retransmit_sa_init (ike_header_t * ike,
1503 ip4_address_t iaddr,
1504 ip4_address_t raddr)
1506 ikev2_main_t * km = &ikev2_main;
1509 pool_foreach (sa, km->sas, ({
1510 if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1511 sa->iaddr.as_u32 == iaddr.as_u32 &&
1512 sa->raddr.as_u32 == raddr.as_u32)
1515 u32 len = clib_net_to_host_u32(ike->length);
1516 u8 payload = ike->nextpayload;
1518 while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1519 ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1520 u32 plen = clib_net_to_host_u16(ikep->length);
1522 if (plen < sizeof(ike_payload_header_t))
1525 if (payload == IKEV2_PAYLOAD_NONCE)
1527 if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1529 /* req is retransmit */
1530 if (sa->state == IKEV2_STATE_SA_INIT)
1533 tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1534 ike->ispi = tmp->ispi;
1535 ike->rspi = tmp->rspi;
1536 ike->nextpayload = tmp->nextpayload;
1537 ike->version = tmp->version;
1538 ike->exchange = tmp->exchange;
1539 ike->flags = tmp->flags;
1540 ike->msgid = tmp->msgid;
1541 ike->length = tmp->length;
1542 memcpy(ike->payload, tmp->payload,
1543 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1544 clib_warning("IKE_SA_INIT retransmit from %U to %U",
1545 format_ip4_address, &raddr,
1546 format_ip4_address, &iaddr);
1549 /* else ignore req */
1552 clib_warning("IKE_SA_INIT ignore from %U to %U",
1553 format_ip4_address, &raddr,
1554 format_ip4_address, &iaddr);
1559 payload = ikep->nextpayload;
1565 /* req is not retransmit */
1570 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
1572 u32 msg_id = clib_net_to_host_u32(ike->msgid);
1575 if (msg_id > sa->last_msg_id)
1577 sa->last_msg_id = msg_id;
1580 /* retransmitted req */
1581 else if (msg_id == sa->last_msg_id)
1584 tmp = (ike_header_t*)sa->last_res_packet_data;
1585 ike->ispi = tmp->ispi;
1586 ike->rspi = tmp->rspi;
1587 ike->nextpayload = tmp->nextpayload;
1588 ike->version = tmp->version;
1589 ike->exchange = tmp->exchange;
1590 ike->flags = tmp->flags;
1591 ike->msgid = tmp->msgid;
1592 ike->length = tmp->length;
1593 memcpy(ike->payload, tmp->payload,
1594 clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1595 clib_warning("IKE msgid %u retransmit from %U to %U",
1597 format_ip4_address, &sa->raddr,
1598 format_ip4_address, &sa->iaddr);
1601 /* old req ignore */
1604 clib_warning("IKE msgid %u req ignore from %U to %U",
1606 format_ip4_address, &sa->raddr,
1607 format_ip4_address, &sa->iaddr);
1613 ikev2_node_fn (vlib_main_t * vm,
1614 vlib_node_runtime_t * node,
1615 vlib_frame_t * frame)
1617 u32 n_left_from, * from, * to_next;
1618 ikev2_next_t next_index;
1619 ikev2_main_t * km = &ikev2_main;
1621 from = vlib_frame_vector_args (frame);
1622 n_left_from = frame->n_vectors;
1623 next_index = node->cached_next_index;
1625 while (n_left_from > 0)
1629 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1631 while (n_left_from > 0 && n_left_to_next > 0)
1635 u32 next0 = IKEV2_NEXT_ERROR_DROP;
1637 ip4_header_t * ip40;
1638 udp_header_t * udp0;
1639 ike_header_t * ike0;
1640 ikev2_sa_t * sa0 = 0;
1644 /* speculatively enqueue b0 to the current next frame */
1650 n_left_to_next -= 1;
1652 b0 = vlib_get_buffer (vm, bi0);
1653 ike0 = vlib_buffer_get_current (b0);
1654 vlib_buffer_advance(b0, - sizeof(*udp0));
1655 udp0 = vlib_buffer_get_current (b0);
1656 vlib_buffer_advance(b0, - sizeof(*ip40));
1657 ip40 = vlib_buffer_get_current (b0);
1659 if (ike0->version != IKE_VERSION_2)
1661 vlib_node_increment_counter(vm, ikev2_node.index,
1662 IKEV2_ERROR_NOT_IKEV2, 1);
1666 if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
1668 ikev2_sa_t sa; /* temporary store for SA */
1670 memset (sa0, 0, sizeof (*sa0));
1672 if (ike0->rspi == 0)
1674 sa0->raddr.as_u32 = ip40->dst_address.as_u32;
1675 sa0->iaddr.as_u32 = ip40->src_address.as_u32;
1677 r = ikev2_retransmit_sa_init(ike0, sa0->iaddr, sa0->raddr);
1680 vlib_node_increment_counter(vm, ikev2_node.index,
1681 IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
1683 len = clib_net_to_host_u32(ike0->length);
1688 vlib_node_increment_counter(vm, ikev2_node.index,
1689 IKEV2_ERROR_IKE_SA_INIT_IGNORE,
1694 ikev2_process_sa_init_req(vm, sa0, ike0);
1696 if (sa0->state == IKEV2_STATE_SA_INIT)
1698 ikev2_sa_free_proposal_vector(&sa0->r_proposals);
1699 sa0->r_proposals = ikev2_select_proposal(sa0->i_proposals,
1700 IKEV2_PROTOCOL_IKE);
1701 ikev2_generate_sa_init_data(sa0);
1704 if (sa0->state == IKEV2_STATE_SA_INIT ||
1705 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1707 len = ikev2_generate_resp(sa0, ike0);
1710 if (sa0->state == IKEV2_STATE_SA_INIT)
1712 /* add SA to the pool */
1713 pool_get (km->sas, sa0);
1714 memcpy(sa0, &sa, sizeof(*sa0));
1715 hash_set (km->sa_by_rspi, sa0->rspi, sa0 - km->sas);
1719 ikev2_sa_free_all_vec(sa0);
1723 else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1726 p = hash_get(km->sa_by_rspi, clib_net_to_host_u64(ike0->rspi));
1729 sa0 = pool_elt_at_index (km->sas, p[0]);
1731 r = ikev2_retransmit_resp(sa0, ike0);
1734 vlib_node_increment_counter(vm, ikev2_node.index,
1735 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
1737 len = clib_net_to_host_u32(ike0->length);
1742 vlib_node_increment_counter(vm, ikev2_node.index,
1743 IKEV2_ERROR_IKE_REQ_IGNORE,
1748 ikev2_process_auth_req(vm, sa0, ike0);
1750 if (sa0->state == IKEV2_STATE_AUTHENTICATED)
1752 ikev2_initial_contact_cleanup(sa0);
1753 ikev2_sa_match_ts(sa0);
1754 if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
1755 ikev2_create_tunnel_interface(km->vnet_main, sa0,
1758 len = ikev2_generate_resp(sa0, ike0);
1761 else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1764 p = hash_get(km->sa_by_rspi, clib_net_to_host_u64(ike0->rspi));
1767 sa0 = pool_elt_at_index (km->sas, p[0]);
1769 r = ikev2_retransmit_resp(sa0, ike0);
1772 vlib_node_increment_counter(vm, ikev2_node.index,
1773 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
1775 len = clib_net_to_host_u32(ike0->length);
1780 vlib_node_increment_counter(vm, ikev2_node.index,
1781 IKEV2_ERROR_IKE_REQ_IGNORE,
1786 ikev2_process_informational_req(vm, sa0, ike0);
1789 if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
1791 ikev2_delete_t * d, * tmp, * resp = 0;
1792 vec_foreach(d, sa0->del)
1794 ikev2_child_sa_t * ch_sa;
1795 ch_sa = ikev2_sa_get_child(sa0, d->spi,
1799 ikev2_delete_tunnel_interface(km->vnet_main,
1801 vec_add2(resp, tmp, 1);
1802 tmp->protocol_id = d->protocol_id;
1803 tmp->spi = ch_sa->r_proposals[0].spi;
1804 ikev2_sa_del_child_sa(sa0, ch_sa);
1811 len = ikev2_generate_resp(sa0, ike0);
1814 else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1817 p = hash_get(km->sa_by_rspi, clib_net_to_host_u64(ike0->rspi));
1820 sa0 = pool_elt_at_index (km->sas, p[0]);
1822 r = ikev2_retransmit_resp(sa0, ike0);
1825 vlib_node_increment_counter(vm, ikev2_node.index,
1826 IKEV2_ERROR_IKE_REQ_RETRANSMIT,
1828 len = clib_net_to_host_u32(ike0->length);
1833 vlib_node_increment_counter(vm, ikev2_node.index,
1834 IKEV2_ERROR_IKE_REQ_IGNORE,
1839 ikev2_process_create_child_sa_req(vm, sa0, ike0);
1842 if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
1844 ikev2_child_sa_t * child;
1845 vec_add2(sa0->childs, child, 1);
1846 child->r_proposals = sa0->rekey[0].r_proposal;
1847 child->i_proposals = sa0->rekey[0].i_proposal;
1848 child->tsi = sa0->rekey[0].tsi;
1849 child->tsr = sa0->rekey[0].tsr;
1850 ikev2_create_tunnel_interface(km->vnet_main, sa0,
1853 len = ikev2_generate_resp(sa0, ike0);
1859 clib_warning("IKEv2 exchange %u packet received from %U to %U",
1861 format_ip4_address, ip40->src_address.as_u8,
1862 format_ip4_address, ip40->dst_address.as_u8);
1866 /* if we are sending packet back, rewrite headers */
1869 next0 = IKEV2_NEXT_IP4_LOOKUP;
1870 ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
1871 ip40->src_address.as_u32 = sa0->raddr.as_u32;
1872 udp0->length = clib_host_to_net_u16(len + sizeof(udp_header_t));
1874 b0->current_length = len + sizeof(ip4_header_t) + sizeof(udp_header_t);
1875 ip40->length = clib_host_to_net_u16(b0->current_length);
1876 ip40->checksum = ip4_header_checksum (ip40);
1879 if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
1880 sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
1882 ikev2_child_sa_t * c;
1884 vec_foreach(c, sa0->childs)
1885 ikev2_delete_tunnel_interface(km->vnet_main, sa0, c);
1887 ikev2_delete_sa(sa0);
1889 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
1891 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
1892 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1894 ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
1895 t->sw_if_index = sw_if_index0;
1896 t->next_index = next0;
1899 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1900 n_left_to_next, bi0, next0);
1903 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1906 vlib_node_increment_counter (vm, ikev2_node.index,
1907 IKEV2_ERROR_PROCESSED, frame->n_vectors);
1908 return frame->n_vectors;
1911 VLIB_REGISTER_NODE (ikev2_node) = {
1912 .function = ikev2_node_fn,
1914 .vector_size = sizeof (u32),
1915 .format_trace = format_ikev2_trace,
1916 .type = VLIB_NODE_TYPE_INTERNAL,
1918 .n_errors = ARRAY_LEN(ikev2_error_strings),
1919 .error_strings = ikev2_error_strings,
1921 .n_next_nodes = IKEV2_N_NEXT,
1924 [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
1925 [IKEV2_NEXT_ERROR_DROP] = "error-drop",
1930 static ikev2_profile_t *
1931 ikev2_profile_index_by_name(u8 * name)
1933 ikev2_main_t * km = &ikev2_main;
1936 p = mhash_get (&km->profile_index_by_name, name);
1940 return pool_elt_at_index(km->profiles, p[0]);
1944 ikev2_set_local_key(vlib_main_t * vm, u8 * file)
1946 ikev2_main_t * km = &ikev2_main;
1948 km->pkey = ikev2_load_key_file(file);
1949 if (km->pkey == NULL)
1950 return clib_error_return(0, "load key '%s' failed", file);
1956 ikev2_add_del_profile(vlib_main_t * vm, u8 * name, int is_add)
1958 ikev2_main_t * km = &ikev2_main;
1959 ikev2_profile_t * p;
1963 if (ikev2_profile_index_by_name(name))
1964 return clib_error_return(0, "policy %v already exists", name);
1966 pool_get (km->profiles, p);
1967 memset(p, 0, sizeof(*p));
1968 p->name = vec_dup(name);
1969 uword index = p - km->profiles;
1970 mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
1974 p = ikev2_profile_index_by_name(name);
1976 return clib_error_return(0, "policy %v does not exists", name);
1979 pool_put (km->profiles, p);
1980 mhash_unset (&km->profile_index_by_name, name, 0);
1986 ikev2_set_profile_auth(vlib_main_t * vm, u8 * name, u8 auth_method,
1987 u8 * auth_data, u8 data_hex_format)
1989 ikev2_profile_t * p;
1992 p = ikev2_profile_index_by_name(name);
1995 r = clib_error_return(0, "unknown profile %v", name);
1998 vec_free(p->auth.data);
1999 p->auth.method = auth_method;
2000 p->auth.data = vec_dup(auth_data);
2001 p->auth.hex = data_hex_format;
2003 if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2006 EVP_PKEY_free(p->auth.key);
2007 p->auth.key = ikev2_load_cert_file(auth_data);
2008 if (p->auth.key == NULL)
2009 return clib_error_return(0, "load cert '%s' failed", auth_data);
2016 ikev2_set_profile_id(vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2019 ikev2_profile_t * p;
2022 if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2024 r = clib_error_return(0, "unsupported identity type %U",
2025 format_ikev2_id_type, id_type);
2029 p = ikev2_profile_index_by_name(name);
2032 r = clib_error_return(0, "unknown profile %v", name);
2038 vec_free(p->loc_id.data);
2039 p->loc_id.type = id_type;
2040 p->loc_id.data = vec_dup(data);
2044 vec_free(p->rem_id.data);
2045 p->rem_id.type = id_type;
2046 p->rem_id.data = vec_dup(data);
2053 ikev2_set_profile_ts(vlib_main_t * vm, u8 * name, u8 protocol_id,
2054 u16 start_port, u16 end_port, ip4_address_t start_addr,
2055 ip4_address_t end_addr, int is_local)
2057 ikev2_profile_t * p;
2060 p = ikev2_profile_index_by_name(name);
2063 r = clib_error_return(0, "unknown profile %v", name);
2069 p->loc_ts.start_addr.as_u32= start_addr.as_u32;
2070 p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2071 p->loc_ts.start_port = start_port;
2072 p->loc_ts.end_port = end_port;
2073 p->loc_ts.protocol_id = protocol_id;
2074 p->loc_ts.ts_type = 7;
2078 p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2079 p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2080 p->rem_ts.start_port = start_port;
2081 p->rem_ts.end_port = end_port;
2082 p->rem_ts.protocol_id = protocol_id;
2083 p->rem_ts.ts_type = 7;
2091 ikev2_init (vlib_main_t * vm)
2093 ikev2_main_t * km = &ikev2_main;
2094 clib_error_t * error;
2096 memset (km, 0, sizeof (ikev2_main_t));
2097 km->vnet_main = vnet_get_main();
2100 ikev2_crypto_init(km);
2102 km->sa_by_rspi = hash_create (0, sizeof (uword));
2103 mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
2105 if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
2108 udp_register_dst_port (vm, 500, ikev2_node.index, 1);