FD.io VPP  v18.01-8-g0eacf49
Vector Packet Processing
ikev2.c
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 
16 #include <vlib/vlib.h>
17 #include <vnet/vnet.h>
18 #include <vnet/pg/pg.h>
19 #include <vppinfra/error.h>
20 #include <vppinfra/random.h>
21 #include <vnet/udp/udp.h>
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/ikev2.h>
24 #include <vnet/ipsec/ikev2_priv.h>
25 #include <openssl/sha.h>
26 
28 
30  ikev2_sa_t * sa,
31  ikev2_child_sa_t * child);
32 
33 #define ikev2_set_state(sa, v) do { \
34  (sa)->state = v; \
35  clib_warning("sa state changed to " #v); \
36  } while(0);
37 
38 typedef struct
39 {
43 
44 static u8 *
45 format_ikev2_trace (u8 * s, va_list * args)
46 {
47  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
48  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
49  ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
50 
51  s = format (s, "ikev2: sw_if_index %d, next index %d",
52  t->sw_if_index, t->next_index);
53  return s;
54 }
55 
57 
58 #define foreach_ikev2_error \
59 _(PROCESSED, "IKEv2 packets processed") \
60 _(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
61 _(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
62 _(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
63 _(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
64 _(NOT_IKEV2, "Non IKEv2 packets received")
65 
66 typedef enum
67 {
68 #define _(sym,str) IKEV2_ERROR_##sym,
70 #undef _
73 
74 static char *ikev2_error_strings[] = {
75 #define _(sym,string) string,
77 #undef _
78 };
79 
80 typedef enum
81 {
85 } ikev2_next_t;
86 
87 static ikev2_sa_transform_t *
89 {
90  ikev2_main_t *km = &ikev2_main;
92 
94  {
95  if (td->type != t->type)
96  continue;
97 
98  if (td->transform_id != t->transform_id)
99  continue;
100 
101  if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
102  {
103  if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
104  || t->attrs[1] != 14)
105  continue;
106 
107  if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
108  continue;
109  }
110  return td;
111  }
112  return 0;
113 }
114 
115 static ikev2_sa_proposal_t *
117  ikev2_protocol_id_t prot_id)
118 {
119  ikev2_sa_proposal_t *rv = 0;
120  ikev2_sa_proposal_t *proposal;
121  ikev2_sa_transform_t *transform, *new_t;
122  u8 mandatory_bitmap, optional_bitmap;
123 
124  if (prot_id == IKEV2_PROTOCOL_IKE)
125  {
126  mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
127  (1 << IKEV2_TRANSFORM_TYPE_PRF) |
128  (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
129  optional_bitmap = mandatory_bitmap;
130  }
131  else if (prot_id == IKEV2_PROTOCOL_ESP)
132  {
133  mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
134  (1 << IKEV2_TRANSFORM_TYPE_ESN);
135  optional_bitmap = mandatory_bitmap |
136  (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
137  }
138  else if (prot_id == IKEV2_PROTOCOL_AH)
139  {
140  mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
141  (1 << IKEV2_TRANSFORM_TYPE_ESN);
142  optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
143  }
144  else
145  return 0;
146 
147  vec_add2 (rv, proposal, 1);
148 
149  vec_foreach (proposal, proposals)
150  {
151  u8 bitmap = 0;
152  if (proposal->protocol_id != prot_id)
153  continue;
154 
155  vec_foreach (transform, proposal->transforms)
156  {
157  if ((1 << transform->type) & bitmap)
158  continue;
159 
160  if (ikev2_find_transform_data (transform))
161  {
162  bitmap |= 1 << transform->type;
163  vec_add2 (rv->transforms, new_t, 1);
164  clib_memcpy (new_t, transform, sizeof (*new_t));
165  new_t->attrs = vec_dup (transform->attrs);
166  }
167  }
168 
169  clib_warning ("bitmap is %x mandatory is %x optional is %x",
170  bitmap, mandatory_bitmap, optional_bitmap);
171 
172  if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
173  (bitmap & ~optional_bitmap) == 0)
174  {
175  rv->proposal_num = proposal->proposal_num;
176  rv->protocol_id = proposal->protocol_id;
177  RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
178  goto done;
179  }
180  else
181  {
182  vec_free (rv->transforms);
183  }
184  }
185 
186  vec_free (rv);
187 done:
188  return rv;
189 }
190 
194 {
196 
197  if (!p)
198  return 0;
199 
200  vec_foreach (t, p->transforms)
201  {
202  if (t->type == type)
203  return ikev2_find_transform_data (t);
204  }
205  return 0;
206 }
207 
210  int by_initiator)
211 {
213  vec_foreach (c, sa->childs)
214  {
215  ikev2_sa_proposal_t *proposal =
216  by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
217  if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
218  return c;
219  }
220 
221  return 0;
222 }
223 
224 void
226 {
229 
230  if (!*v)
231  return;
232 
233  vec_foreach (p, *v)
234  {
235  vec_foreach (t, p->transforms)
236  {
237  vec_free (t->attrs);
238  }
239  vec_free (p->transforms);
240  }
241  vec_free (*v);
242 };
243 
244 static void
246 {
248  vec_foreach (c, *childs)
249  {
252  vec_free (c->sk_ai);
253  vec_free (c->sk_ar);
254  vec_free (c->sk_ei);
255  vec_free (c->sk_er);
256  }
257 
258  vec_free (*childs);
259 }
260 
261 static void
263 {
266  vec_free (child->sk_ai);
267  vec_free (child->sk_ar);
268  vec_free (child->sk_ei);
269  vec_free (child->sk_er);
270 
271  vec_del1 (sa->childs, child - sa->childs);
272 }
273 
274 static void
276 {
277  vec_free (sa->i_nonce);
278  vec_free (sa->i_dh_data);
279  vec_free (sa->dh_shared_key);
280  vec_free (sa->dh_private_key);
281 
284 
285  vec_free (sa->sk_d);
286  vec_free (sa->sk_ai);
287  vec_free (sa->sk_ar);
288  vec_free (sa->sk_ei);
289  vec_free (sa->sk_er);
290  vec_free (sa->sk_pi);
291  vec_free (sa->sk_pr);
292 
293  vec_free (sa->i_id.data);
294  vec_free (sa->i_auth.data);
295  vec_free (sa->r_id.data);
296  vec_free (sa->r_auth.data);
297  if (sa->r_auth.key)
298  EVP_PKEY_free (sa->r_auth.key);
299 
300  vec_free (sa->del);
301 
303 }
304 
305 static void
307 {
308  ikev2_main_t *km = &ikev2_main;
309  u32 thread_index = vlib_get_thread_index ();
310  uword *p;
311 
313 
314  p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
315  if (p)
316  {
317  hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
318  pool_put (km->per_thread_data[thread_index].sas, sa);
319  }
320 }
321 
322 static void
324 {
325  ikev2_sa_transform_t *t = 0, *t2;
326  ikev2_main_t *km = &ikev2_main;
327 
328  if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
329  {
330  return;
331  }
332 
333  /* check if received DH group is on our list of supported groups */
335  {
336  if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
337  {
338  t = t2;
339  break;
340  }
341  }
342 
343  if (!t)
344  {
345  clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
346  vec_len (sa->i_dh_data));
347  sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
348  return;
349  }
350 
351  if (sa->is_initiator)
352  {
353  /* generate rspi */
354  RAND_bytes ((u8 *) & sa->ispi, 8);
355 
356  /* generate nonce */
358  RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
359  }
360  else
361  {
362  /* generate rspi */
363  RAND_bytes ((u8 *) & sa->rspi, 8);
364 
365  /* generate nonce */
367  RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
368  }
369 
370  /* generate dh keys */
371  ikev2_generate_dh (sa, t);
372 
373 }
374 
375 static void
377 {
378  ikev2_sa_transform_t *t = 0, *t2;
379  ikev2_main_t *km = &ikev2_main;
380 
381 
382  /*move some data to the new SA */
383 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
384  sa->i_nonce = _(sai->i_nonce);
385  sa->i_dh_data = _(sai->i_dh_data);
386  sa->dh_private_key = _(sai->dh_private_key);
387  sa->iaddr.as_u32 = sai->iaddr.as_u32;
388  sa->raddr.as_u32 = sai->raddr.as_u32;
389  sa->is_initiator = sai->is_initiator;
390  sa->profile = sai->profile;
391  sa->i_id.type = sai->i_id.type;
392  sa->i_id.data = _(sai->i_id.data);
393  sa->i_auth.method = sai->i_auth.method;
394  sa->i_auth.hex = sai->i_auth.hex;
395  sa->i_auth.data = _(sai->i_auth.data);
396  sa->i_auth.key = _(sai->i_auth.key);
398  sa->childs = _(sai->childs);
399 #undef _
400 
401 
402  if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
403  {
404  return;
405  }
406 
407  /* check if received DH group is on our list of supported groups */
409  {
410  if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
411  {
412  t = t2;
413  break;
414  }
415  }
416 
417  if (!t)
418  {
419  clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
420  vec_len (sa->i_dh_data));
421  sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
422  return;
423  }
424 
425 
426  /* generate dh keys */
427  ikev2_complete_dh (sa, t);
428 
429 }
430 
431 static void
433 {
434  u8 *tmp;
435  /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
436  u8 *skeyseed = 0;
437  u8 *s = 0;
438  ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
439  tr_encr =
440  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
441  tr_prf =
442  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
443  tr_integ =
444  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
445 
446  vec_append (s, sa->i_nonce);
447  vec_append (s, sa->r_nonce);
448  skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
449 
450  /* Calculate S = Ni | Nr | SPIi | SPIr */
451  u64 *spi;
452  vec_add2 (s, tmp, 2 * sizeof (*spi));
453  spi = (u64 *) tmp;
454  spi[0] = clib_host_to_net_u64 (sa->ispi);
455  spi[1] = clib_host_to_net_u64 (sa->rspi);
456 
457  /* calculate PRFplus */
458  u8 *keymat;
459  int len = tr_prf->key_trunc + /* SK_d */
460  tr_integ->key_len * 2 + /* SK_ai, SK_ar */
461  tr_encr->key_len * 2 + /* SK_ei, SK_er */
462  tr_prf->key_len * 2; /* SK_pi, SK_pr */
463 
464  keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
465  vec_free (skeyseed);
466  vec_free (s);
467 
468  int pos = 0;
469 
470  /* SK_d */
471  sa->sk_d = vec_new (u8, tr_prf->key_trunc);
472  clib_memcpy (sa->sk_d, keymat + pos, tr_prf->key_trunc);
473  pos += tr_prf->key_trunc;
474 
475  /* SK_ai */
476  sa->sk_ai = vec_new (u8, tr_integ->key_len);
477  clib_memcpy (sa->sk_ai, keymat + pos, tr_integ->key_len);
478  pos += tr_integ->key_len;
479 
480  /* SK_ar */
481  sa->sk_ar = vec_new (u8, tr_integ->key_len);
482  clib_memcpy (sa->sk_ar, keymat + pos, tr_integ->key_len);
483  pos += tr_integ->key_len;
484 
485  /* SK_ei */
486  sa->sk_ei = vec_new (u8, tr_encr->key_len);
487  clib_memcpy (sa->sk_ei, keymat + pos, tr_encr->key_len);
488  pos += tr_encr->key_len;
489 
490  /* SK_er */
491  sa->sk_er = vec_new (u8, tr_encr->key_len);
492  clib_memcpy (sa->sk_er, keymat + pos, tr_encr->key_len);
493  pos += tr_encr->key_len;
494 
495  /* SK_pi */
496  sa->sk_pi = vec_new (u8, tr_prf->key_len);
497  clib_memcpy (sa->sk_pi, keymat + pos, tr_prf->key_len);
498  pos += tr_prf->key_len;
499 
500  /* SK_pr */
501  sa->sk_pr = vec_new (u8, tr_prf->key_len);
502  clib_memcpy (sa->sk_pr, keymat + pos, tr_prf->key_len);
503  pos += tr_prf->key_len;
504 
505  vec_free (keymat);
506 }
507 
508 static void
510 {
511  u8 *s = 0;
512  ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
513  tr_prf =
514  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
515  ctr_encr =
516  ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
517  ctr_integ =
518  ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
519 
520  vec_append (s, sa->i_nonce);
521  vec_append (s, sa->r_nonce);
522  /* calculate PRFplus */
523  u8 *keymat;
524  int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
525 
526  keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
527 
528  int pos = 0;
529 
530  /* SK_ei */
531  child->sk_ei = vec_new (u8, ctr_encr->key_len);
532  clib_memcpy (child->sk_ei, keymat + pos, ctr_encr->key_len);
533  pos += ctr_encr->key_len;
534 
535  /* SK_ai */
536  child->sk_ai = vec_new (u8, ctr_integ->key_len);
537  clib_memcpy (child->sk_ai, keymat + pos, ctr_integ->key_len);
538  pos += ctr_integ->key_len;
539 
540  /* SK_er */
541  child->sk_er = vec_new (u8, ctr_encr->key_len);
542  clib_memcpy (child->sk_er, keymat + pos, ctr_encr->key_len);
543  pos += ctr_encr->key_len;
544 
545  /* SK_ar */
546  child->sk_ar = vec_new (u8, ctr_integ->key_len);
547  clib_memcpy (child->sk_ar, keymat + pos, ctr_integ->key_len);
548  pos += ctr_integ->key_len;
549 
550  ASSERT (pos == len);
551 
552  vec_free (keymat);
553 }
554 
555 static void
557  ike_header_t * ike)
558 {
559  int p = 0;
560  u32 len = clib_net_to_host_u32 (ike->length);
561  u8 payload = ike->nextpayload;
562 
563  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
564  "exchange %x flags %x msgid %x length %u",
565  clib_net_to_host_u64 (ike->ispi),
566  clib_net_to_host_u64 (ike->rspi),
567  payload, ike->version,
568  ike->exchange, ike->flags,
569  clib_net_to_host_u32 (ike->msgid), len);
570 
571  sa->ispi = clib_net_to_host_u64 (ike->ispi);
572 
573  /* store whole IKE payload - needed for PSK auth */
575  vec_add (sa->last_sa_init_req_packet_data, ike, len);
576 
577  while (p < len && payload != IKEV2_PAYLOAD_NONE)
578  {
579  ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
580  u32 plen = clib_net_to_host_u16 (ikep->length);
581 
582  if (plen < sizeof (ike_payload_header_t))
583  return;
584 
585  if (payload == IKEV2_PAYLOAD_SA)
586  {
588  sa->i_proposals = ikev2_parse_sa_payload (ikep);
589  }
590  else if (payload == IKEV2_PAYLOAD_KE)
591  {
592  ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
593  sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
594  vec_free (sa->i_dh_data);
595  vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
596  }
597  else if (payload == IKEV2_PAYLOAD_NONCE)
598  {
599  vec_free (sa->i_nonce);
600  vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
601  }
602  else if (payload == IKEV2_PAYLOAD_NOTIFY)
603  {
605  vec_free (n);
606  }
607  else if (payload == IKEV2_PAYLOAD_VENDOR)
608  {
610  }
611  else
612  {
613  clib_warning ("unknown payload %u flags %x length %u", payload,
614  ikep->flags, plen);
615  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
616  {
618  sa->unsupported_cp = payload;
619  return;
620  }
621  }
622 
623  payload = ikep->nextpayload;
624  p += plen;
625  }
626 
628 }
629 
630 static void
632  ike_header_t * ike)
633 {
634  int p = 0;
635  u32 len = clib_net_to_host_u32 (ike->length);
636  u8 payload = ike->nextpayload;
637 
638  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
639  "exchange %x flags %x msgid %x length %u",
640  clib_net_to_host_u64 (ike->ispi),
641  clib_net_to_host_u64 (ike->rspi),
642  payload, ike->version,
643  ike->exchange, ike->flags,
644  clib_net_to_host_u32 (ike->msgid), len);
645 
646  sa->ispi = clib_net_to_host_u64 (ike->ispi);
647  sa->rspi = clib_net_to_host_u64 (ike->rspi);
648 
649  /* store whole IKE payload - needed for PSK auth */
651  vec_add (sa->last_sa_init_res_packet_data, ike, len);
652 
653  while (p < len && payload != IKEV2_PAYLOAD_NONE)
654  {
655  ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
656  u32 plen = clib_net_to_host_u16 (ikep->length);
657 
658  if (plen < sizeof (ike_payload_header_t))
659  return;
660 
661  if (payload == IKEV2_PAYLOAD_SA)
662  {
664  sa->r_proposals = ikev2_parse_sa_payload (ikep);
665  if (sa->r_proposals)
666  {
668  ike->msgid =
669  clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
670  }
671  }
672  else if (payload == IKEV2_PAYLOAD_KE)
673  {
674  ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
675  sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
676  vec_free (sa->r_dh_data);
677  vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
678  }
679  else if (payload == IKEV2_PAYLOAD_NONCE)
680  {
681  vec_free (sa->r_nonce);
682  vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
683  }
684  else if (payload == IKEV2_PAYLOAD_NOTIFY)
685  {
687  vec_free (n);
688  }
689  else if (payload == IKEV2_PAYLOAD_VENDOR)
690  {
692  }
693  else
694  {
695  clib_warning ("unknown payload %u flags %x length %u", payload,
696  ikep->flags, plen);
697  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
698  {
700  sa->unsupported_cp = payload;
701  return;
702  }
703  }
704 
705  payload = ikep->nextpayload;
706  p += plen;
707  }
708 }
709 
710 static u8 *
711 ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
712 {
713  int p = 0;
714  u8 last_payload = 0;
715  u8 *hmac = 0;
716  u32 len = clib_net_to_host_u32 (ike->length);
717  ike_payload_header_t *ikep = 0;
718  u32 plen = 0;
719  ikev2_sa_transform_t *tr_integ;
720  tr_integ =
721  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
722 
723  while (p < len &&
724  *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
725  {
726  ikep = (ike_payload_header_t *) & ike->payload[p];
727  plen = clib_net_to_host_u16 (ikep->length);
728 
729  if (plen < sizeof (*ikep))
730  return 0;
731 
732  if (*payload == IKEV2_PAYLOAD_SK)
733  {
734  clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
735  last_payload = *payload;
736  }
737  else
738  {
739  clib_warning ("unknown payload %u flags %x length %u", payload,
740  ikep->flags, plen);
741  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
742  {
743  sa->unsupported_cp = *payload;
744  return 0;
745  }
746  }
747 
748  *payload = ikep->nextpayload;
749  p += plen;
750  }
751 
752  if (last_payload != IKEV2_PAYLOAD_SK)
753  {
754  clib_warning ("Last payload must be SK");
755  return 0;
756  }
757 
758  hmac =
759  ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
760  (u8 *) ike, len - tr_integ->key_trunc);
761 
762  plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
763 
764  if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
765  {
766  clib_warning ("message integrity check failed");
767  vec_free (hmac);
768  return 0;
769  }
770  vec_free (hmac);
771 
772  return ikev2_decrypt_data (sa, ikep->payload, plen);
773 }
774 
775 static void
777 {
778  ikev2_main_t *km = &ikev2_main;
779  ikev2_sa_t *tmp;
780  u32 i, *delete = 0;
782  u32 thread_index = vlib_get_thread_index ();
783 
784  if (!sa->initial_contact)
785  return;
786 
787  /* find old IKE SAs with the same authenticated identity */
788  /* *INDENT-OFF* */
789  pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
790  if (tmp->i_id.type != sa->i_id.type ||
791  vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
792  memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
793  continue;
794 
795  if (sa->rspi != tmp->rspi)
796  vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
797  }));
798  /* *INDENT-ON* */
799 
800  for (i = 0; i < vec_len (delete); i++)
801  {
802  tmp =
803  pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
804  vec_foreach (c,
806  tmp, c);
807  ikev2_delete_sa (tmp);
808  }
809 
810  vec_free (delete);
811  sa->initial_contact = 0;
812 }
813 
814 static void
815 ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
816 {
817  ikev2_child_sa_t *first_child_sa;
818  int p = 0;
819  u32 len = clib_net_to_host_u32 (ike->length);
820  u8 payload = ike->nextpayload;
821  u8 *plaintext = 0;
822 
823  ike_payload_header_t *ikep;
824  u32 plen;
825 
826  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
827  "exchange %x flags %x msgid %x length %u",
828  clib_net_to_host_u64 (ike->ispi),
829  clib_net_to_host_u64 (ike->rspi),
830  payload, ike->version,
831  ike->exchange, ike->flags,
832  clib_net_to_host_u32 (ike->msgid), len);
833 
834  ikev2_calc_keys (sa);
835 
836  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
837 
838  if (!plaintext)
839  {
840  if (sa->unsupported_cp)
842  goto cleanup_and_exit;
843  }
844 
845  /* select or create 1st child SA */
846  if (sa->is_initiator)
847  {
848  first_child_sa = &sa->childs[0];
849  }
850  else
851  {
853  vec_add2 (sa->childs, first_child_sa, 1);
854  }
855 
856 
857  /* process encrypted payload */
858  p = 0;
859  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
860  {
861  ikep = (ike_payload_header_t *) & plaintext[p];
862  plen = clib_net_to_host_u16 (ikep->length);
863 
864  if (plen < sizeof (ike_payload_header_t))
865  goto cleanup_and_exit;
866 
867  if (payload == IKEV2_PAYLOAD_SA) /* 33 */
868  {
869  clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
870  if (sa->is_initiator)
871  {
872  ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
873  first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
874  }
875  else
876  {
877  ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
878  first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
879  }
880  }
881  else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */
882  {
883  ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
884 
885  sa->i_id.type = id->id_type;
886  vec_free (sa->i_id.data);
887  vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
888 
889  clib_warning ("received payload IDi, len %u id_type %u",
890  plen - sizeof (*id), id->id_type);
891  }
892  else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */
893  {
894  ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
895 
896  sa->r_id.type = id->id_type;
897  vec_free (sa->r_id.data);
898  vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
899 
900  clib_warning ("received payload IDr len %u id_type %u",
901  plen - sizeof (*id), id->id_type);
902  }
903  else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */
904  {
905  ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
906 
907  if (sa->is_initiator)
908  {
909  sa->r_auth.method = a->auth_method;
910  vec_free (sa->r_auth.data);
911  vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
912  }
913  else
914  {
915  sa->i_auth.method = a->auth_method;
916  vec_free (sa->i_auth.data);
917  vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
918  }
919 
920  clib_warning ("received payload AUTH, len %u auth_type %u",
921  plen - sizeof (*a), a->auth_method);
922  }
923  else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
924  {
926  if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
927  {
928  sa->initial_contact = 1;
929  }
930  vec_free (n);
931  }
932  else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
933  {
935  }
936  else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */
937  {
938  clib_warning ("received payload TSi, len %u",
939  plen - sizeof (*ikep));
940 
941  vec_free (first_child_sa->tsi);
942  first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
943  }
944  else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */
945  {
946  clib_warning ("received payload TSr, len %u",
947  plen - sizeof (*ikep));
948 
949  vec_free (first_child_sa->tsr);
950  first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
951  }
952  else
953  {
954  clib_warning ("unknown payload %u flags %x length %u data %u",
955  payload, ikep->flags, plen - 4,
956  format_hex_bytes, ikep->payload, plen - 4);
957 
958  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
959  {
961  sa->unsupported_cp = payload;
962  return;
963  }
964  }
965 
966  payload = ikep->nextpayload;
967  p += plen;
968  }
969 
970 cleanup_and_exit:
971  vec_free (plaintext);
972 }
973 
974 static void
976  ike_header_t * ike)
977 {
978  int p = 0;
979  u32 len = clib_net_to_host_u32 (ike->length);
980  u8 payload = ike->nextpayload;
981  u8 *plaintext = 0;
982 
983  ike_payload_header_t *ikep;
984  u32 plen;
985 
986  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
987  "exchange %x flags %x msgid %x length %u",
988  clib_net_to_host_u64 (ike->ispi),
989  clib_net_to_host_u64 (ike->rspi),
990  payload, ike->version,
991  ike->exchange, ike->flags,
992  clib_net_to_host_u32 (ike->msgid), len);
993 
994  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
995 
996  if (!plaintext)
997  goto cleanup_and_exit;
998 
999  /* process encrypted payload */
1000  p = 0;
1001  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1002  {
1003  ikep = (ike_payload_header_t *) & plaintext[p];
1004  plen = clib_net_to_host_u16 (ikep->length);
1005 
1006  if (plen < sizeof (ike_payload_header_t))
1007  goto cleanup_and_exit;
1008 
1009  if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */
1010  {
1012  if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
1014  vec_free (n);
1015  }
1016  else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */
1017  {
1018  sa->del = ikev2_parse_delete_payload (ikep);
1019  }
1020  else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */
1021  {
1023  }
1024  else
1025  {
1026  clib_warning ("unknown payload %u flags %x length %u data %u",
1027  payload, ikep->flags, plen - 4,
1028  format_hex_bytes, ikep->payload, plen - 4);
1029 
1030  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1031  {
1032  sa->unsupported_cp = payload;
1033  return;
1034  }
1035  }
1036 
1037  payload = ikep->nextpayload;
1038  p += plen;
1039  }
1040 
1041 cleanup_and_exit:
1042  vec_free (plaintext);
1043 }
1044 
1045 static void
1047  ike_header_t * ike)
1048 {
1049  int p = 0;
1050  u32 len = clib_net_to_host_u32 (ike->length);
1051  u8 payload = ike->nextpayload;
1052  u8 *plaintext = 0;
1053  u8 rekeying = 0;
1054  u8 nonce[IKEV2_NONCE_SIZE];
1055 
1056  ike_payload_header_t *ikep;
1057  u32 plen;
1058  ikev2_notify_t *n = 0;
1059  ikev2_ts_t *tsi = 0;
1060  ikev2_ts_t *tsr = 0;
1061  ikev2_sa_proposal_t *proposal = 0;
1062  ikev2_child_sa_t *child_sa;
1063 
1064  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
1065  "exchange %x flags %x msgid %x length %u",
1066  clib_net_to_host_u64 (ike->ispi),
1067  clib_net_to_host_u64 (ike->rspi),
1068  payload, ike->version,
1069  ike->exchange, ike->flags,
1070  clib_net_to_host_u32 (ike->msgid), len);
1071 
1072  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
1073 
1074  if (!plaintext)
1075  goto cleanup_and_exit;
1076 
1077  /* process encrypted payload */
1078  p = 0;
1079  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
1080  {
1081  ikep = (ike_payload_header_t *) & plaintext[p];
1082  plen = clib_net_to_host_u16 (ikep->length);
1083 
1084  if (plen < sizeof (ike_payload_header_t))
1085  goto cleanup_and_exit;
1086 
1087  else if (payload == IKEV2_PAYLOAD_SA)
1088  {
1089  proposal = ikev2_parse_sa_payload (ikep);
1090  }
1091  else if (payload == IKEV2_PAYLOAD_NOTIFY)
1092  {
1093  n = ikev2_parse_notify_payload (ikep);
1094  if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
1095  {
1096  rekeying = 1;
1097  }
1098  }
1099  else if (payload == IKEV2_PAYLOAD_DELETE)
1100  {
1101  sa->del = ikev2_parse_delete_payload (ikep);
1102  }
1103  else if (payload == IKEV2_PAYLOAD_VENDOR)
1104  {
1106  }
1107  else if (payload == IKEV2_PAYLOAD_NONCE)
1108  {
1109  clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep));
1110  }
1111  else if (payload == IKEV2_PAYLOAD_TSI)
1112  {
1113  tsi = ikev2_parse_ts_payload (ikep);
1114  }
1115  else if (payload == IKEV2_PAYLOAD_TSR)
1116  {
1117  tsr = ikev2_parse_ts_payload (ikep);
1118  }
1119  else
1120  {
1121  clib_warning ("unknown payload %u flags %x length %u data %u",
1122  payload, ikep->flags, plen - 4,
1123  format_hex_bytes, ikep->payload, plen - 4);
1124 
1125  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
1126  {
1127  sa->unsupported_cp = payload;
1128  return;
1129  }
1130  }
1131 
1132  payload = ikep->nextpayload;
1133  p += plen;
1134  }
1135 
1136  if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
1137  {
1138  ikev2_rekey_t *rekey = &sa->rekey[0];
1139  rekey->protocol_id = proposal->protocol_id;
1140  rekey->i_proposal =
1142  rekey->i_proposal->spi = rekey->spi;
1143  rekey->r_proposal = proposal;
1144  rekey->tsi = tsi;
1145  rekey->tsr = tsr;
1146  /* update Nr */
1147  vec_free (sa->r_nonce);
1148  vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
1149  child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
1150  if (child_sa)
1151  {
1152  child_sa->rekey_retries = 0;
1153  }
1154  }
1155  else if (rekeying)
1156  {
1157  ikev2_rekey_t *rekey;
1158  child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
1159  if (!child_sa)
1160  {
1161  clib_warning ("child SA spi %lx not found", n->spi);
1162  goto cleanup_and_exit;
1163  }
1164  vec_add2 (sa->rekey, rekey, 1);
1165  rekey->protocol_id = n->protocol_id;
1166  rekey->spi = n->spi;
1167  rekey->i_proposal = proposal;
1168  rekey->r_proposal =
1170  rekey->tsi = tsi;
1171  rekey->tsr = tsr;
1172  /* update Ni */
1173  vec_free (sa->i_nonce);
1174  vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
1175  /* generate new Nr */
1176  vec_free (sa->r_nonce);
1178  RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
1179  }
1180 
1181 cleanup_and_exit:
1182  vec_free (plaintext);
1183  vec_free (n);
1184 }
1185 
1186 static u8 *
1187 ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
1188 {
1189  u8 *authmsg = 0;
1190  u8 *data;
1191  u8 *nonce;
1192  ikev2_id_t *id;
1193  u8 *key;
1194  u8 *packet_data;
1195  ikev2_sa_transform_t *tr_prf;
1196 
1197  tr_prf =
1198  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1199 
1200  if (is_responder)
1201  {
1202  id = &sa->r_id;
1203  key = sa->sk_pr;
1204  nonce = sa->i_nonce;
1205  packet_data = sa->last_sa_init_res_packet_data;
1206  }
1207  else
1208  {
1209  id = &sa->i_id;
1210  key = sa->sk_pi;
1211  nonce = sa->r_nonce;
1212  packet_data = sa->last_sa_init_req_packet_data;
1213  }
1214 
1215  data = vec_new (u8, 4);
1216  data[0] = id->type;
1217  vec_append (data, id->data);
1218 
1219  u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
1220  vec_append (authmsg, packet_data);
1221  vec_append (authmsg, nonce);
1222  vec_append (authmsg, id_hash);
1223  vec_free (id_hash);
1224  vec_free (data);
1225 
1226  return authmsg;
1227 }
1228 
1229 static int
1231 {
1232  if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
1233  ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
1234  ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
1235  ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
1236  return 1;
1237 
1238  return 0;
1239 }
1240 
1241 static void
1243 {
1244  ikev2_main_t *km = &ikev2_main;
1245  ikev2_profile_t *p;
1246  ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
1247  ikev2_id_t *id;
1248 
1249  /* *INDENT-OFF* */
1250  pool_foreach (p, km->profiles, ({
1251 
1252  if (sa->is_initiator)
1253  {
1254  p_tsi = &p->loc_ts;
1255  p_tsr = &p->rem_ts;
1256  id = &sa->r_id;
1257  }
1258  else
1259  {
1260  p_tsi = &p->rem_ts;
1261  p_tsr = &p->loc_ts;
1262  id = &sa->i_id;
1263  }
1264 
1265  /* check id */
1266  if (p->rem_id.type != id->type ||
1267  vec_len(p->rem_id.data) != vec_len(id->data) ||
1268  memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
1269  continue;
1270 
1271  vec_foreach(ts, sa->childs[0].tsi)
1272  {
1273  if (ikev2_ts_cmp(p_tsi, ts))
1274  {
1275  tsi = vec_dup(ts);
1276  break;
1277  }
1278  }
1279 
1280  vec_foreach(ts, sa->childs[0].tsr)
1281  {
1282  if (ikev2_ts_cmp(p_tsr, ts))
1283  {
1284  tsr = vec_dup(ts);
1285  break;
1286  }
1287  }
1288 
1289  break;
1290  }));
1291  /* *INDENT-ON* */
1292 
1293  if (tsi && tsr)
1294  {
1295  vec_free (sa->childs[0].tsi);
1296  vec_free (sa->childs[0].tsr);
1297  sa->childs[0].tsi = tsi;
1298  sa->childs[0].tsr = tsr;
1299  }
1300  else
1301  {
1302  vec_free (tsi);
1303  vec_free (tsr);
1305  }
1306 }
1307 
1308 static void
1310 {
1311  ikev2_main_t *km = &ikev2_main;
1312  ikev2_profile_t *p, *sel_p = 0;
1313  u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1314  ikev2_sa_transform_t *tr_prf;
1315 
1316  tr_prf =
1317  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1318 
1319  /* only shared key and rsa signature */
1320  if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1321  sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1322  {
1323  clib_warning ("unsupported authentication method %u",
1324  sa->i_auth.method);
1326  return;
1327  }
1328 
1329  key_pad = format (0, "%s", IKEV2_KEY_PAD);
1330  authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
1331 
1332  ikev2_id_t *sa_id;
1333  ikev2_auth_t *sa_auth;
1334 
1335  if (sa->is_initiator)
1336  {
1337  sa_id = &sa->r_id;
1338  sa_auth = &sa->r_auth;
1339  }
1340  else
1341  {
1342  sa_id = &sa->i_id;
1343  sa_auth = &sa->i_auth;
1344  }
1345 
1346  /* *INDENT-OFF* */
1347  pool_foreach (p, km->profiles, ({
1348 
1349  /* check id */
1350  if (p->rem_id.type != sa_id->type ||
1351  vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
1352  memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
1353  continue;
1354 
1355  if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1356  {
1357  if (!p->auth.data ||
1358  p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1359  continue;
1360 
1361  psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
1362  auth = ikev2_calc_prf(tr_prf, psk, authmsg);
1363 
1364  if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
1365  {
1366  ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1367  vec_free(auth);
1368  sel_p = p;
1369  break;
1370  }
1371 
1372  }
1373  else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
1374  {
1375  if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
1376  continue;
1377 
1378  if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
1379  {
1380  ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
1381  sel_p = p;
1382  break;
1383  }
1384  }
1385 
1386  vec_free(auth);
1387  vec_free(psk);
1388  }));
1389  /* *INDENT-ON* */
1390 
1391  vec_free (authmsg);
1392 
1393  if (sa->state == IKEV2_STATE_AUTHENTICATED)
1394  {
1395  if (!sa->is_initiator)
1396  {
1397  vec_free (sa->r_id.data);
1398  sa->r_id.data = vec_dup (sel_p->loc_id.data);
1399  sa->r_id.type = sel_p->loc_id.type;
1400 
1401  /* generate our auth data */
1402  authmsg = ikev2_sa_generate_authmsg (sa, 1);
1403  if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1404  {
1405  sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1406  sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1407  }
1408  else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1409  {
1410  sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1411  sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1412  }
1413  vec_free (authmsg);
1414 
1415  /* select transforms for 1st child sa */
1416  ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
1417  sa->childs[0].r_proposals =
1418  ikev2_select_proposal (sa->childs[0].i_proposals,
1420  }
1421  }
1422  else
1423  {
1425  }
1426  vec_free (psk);
1427  vec_free (key_pad);
1428 }
1429 
1430 
1431 static void
1433 {
1434  ikev2_main_t *km = &ikev2_main;
1435  u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
1436  ikev2_sa_transform_t *tr_prf;
1437 
1438  tr_prf =
1439  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
1440 
1441  /* only shared key and rsa signature */
1442  if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
1443  sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
1444  {
1445  clib_warning ("unsupported authentication method %u",
1446  sa->i_auth.method);
1448  return;
1449  }
1450 
1451  key_pad = format (0, "%s", IKEV2_KEY_PAD);
1452  authmsg = ikev2_sa_generate_authmsg (sa, 0);
1453  psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
1454  auth = ikev2_calc_prf (tr_prf, psk, authmsg);
1455 
1456 
1457  if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
1458  {
1459  sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
1460  sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
1461  }
1462  else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
1463  {
1464  sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
1465  sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
1466  }
1467 
1468  vec_free (psk);
1469  vec_free (key_pad);
1470  vec_free (auth);
1471  vec_free (authmsg);
1472 }
1473 
1474 
1475 static int
1477  ikev2_child_sa_t * child)
1478 {
1481  ikev2_sa_proposal_t *proposals;
1482  u8 encr_type = 0;
1483 
1484  if (!child->r_proposals)
1485  {
1487  return 1;
1488  }
1489 
1490  memset (&a, 0, sizeof (a));
1491  a.is_add = 1;
1492  if (sa->is_initiator)
1493  {
1494  a.local_ip.as_u32 = sa->iaddr.as_u32;
1495  a.remote_ip.as_u32 = sa->raddr.as_u32;
1496  proposals = child->i_proposals;
1497  a.local_spi = child->r_proposals[0].spi;
1498  a.remote_spi = child->i_proposals[0].spi;
1499  }
1500  else
1501  {
1502  a.local_ip.as_u32 = sa->raddr.as_u32;
1503  a.remote_ip.as_u32 = sa->iaddr.as_u32;
1504  proposals = child->r_proposals;
1505  a.local_spi = child->i_proposals[0].spi;
1506  a.remote_spi = child->r_proposals[0].spi;
1507  }
1508  a.anti_replay = 1;
1509 
1510  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
1511  if (tr)
1512  a.esn = tr->esn_type;
1513  else
1514  a.esn = 0;
1515 
1516  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1517  if (tr)
1518  {
1519  if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
1520  {
1521  switch (tr->key_len)
1522  {
1523  case 16:
1524  encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
1525  break;
1526  case 24:
1527  encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
1528  break;
1529  case 32:
1530  encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
1531  break;
1532  default:
1534  return 1;
1535  break;
1536  }
1537  }
1538  else
1539  {
1541  return 1;
1542  }
1543  }
1544  else
1545  {
1547  return 1;
1548  }
1549 
1550  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1551  if (tr)
1552  {
1553  if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
1554  {
1556  return 1;
1557  }
1558  }
1559  else
1560  {
1562  return 1;
1563  }
1564 
1565  ikev2_calc_child_keys (sa, child);
1566 
1567  u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
1568  if (sa->is_initiator)
1569  {
1570  loc_ikey = child->sk_ai;
1571  rem_ikey = child->sk_ar;
1572  loc_ckey = child->sk_ei;
1573  rem_ckey = child->sk_er;
1574  }
1575  else
1576  {
1577  loc_ikey = child->sk_ar;
1578  rem_ikey = child->sk_ai;
1579  loc_ckey = child->sk_er;
1580  rem_ckey = child->sk_ei;
1581  }
1582 
1583  a.integ_alg = IPSEC_INTEG_ALG_SHA1_96;
1584  a.local_integ_key_len = vec_len (loc_ikey);
1586  a.remote_integ_key_len = vec_len (rem_ikey);
1588 
1589  a.crypto_alg = encr_type;
1590  a.local_crypto_key_len = vec_len (loc_ckey);
1592  a.remote_crypto_key_len = vec_len (rem_ckey);
1594 
1595  if (sa->profile && sa->profile->lifetime)
1596  {
1598  + sa->profile->lifetime;
1599  if (sa->profile->lifetime_jitter)
1600  {
1601  // This is not much better than rand(3), which Coverity warns
1602  // is unsuitable for security applications; random_u32 is
1603  // however fast. If this perturbance to the expiration time
1604  // needs to use a better RNG then we may need to use something
1605  // like /dev/urandom which has significant overhead.
1606  u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
1607  rnd = random_u32 (&rnd);
1608 
1609  child->time_to_expiration +=
1610  1 + (rnd % sa->profile->lifetime_jitter);
1611  }
1612  }
1613 
1615 
1616  return 0;
1617 }
1618 
1619 static int
1621  ikev2_child_sa_t * child)
1622 {
1624 
1625  if (sa->is_initiator)
1626  {
1627  if (!vec_len (child->i_proposals))
1628  return 0;
1629 
1630  a.is_add = 0;
1631  a.local_ip.as_u32 = sa->iaddr.as_u32;
1632  a.remote_ip.as_u32 = sa->raddr.as_u32;
1633  a.local_spi = child->r_proposals[0].spi;
1634  a.remote_spi = child->i_proposals[0].spi;
1635  }
1636  else
1637  {
1638  if (!vec_len (child->r_proposals))
1639  return 0;
1640 
1641  a.is_add = 0;
1642  a.local_ip.as_u32 = sa->raddr.as_u32;
1643  a.remote_ip.as_u32 = sa->iaddr.as_u32;
1644  a.local_spi = child->i_proposals[0].spi;
1645  a.remote_spi = child->r_proposals[0].spi;
1646  }
1647 
1649  return 0;
1650 }
1651 
1652 static u32
1653 ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
1654 {
1655  v8 *integ = 0;
1656  ike_payload_header_t *ph;
1657  u16 plen;
1658  u32 tlen = 0;
1659 
1660  ikev2_sa_transform_t *tr_encr, *tr_integ;
1661  tr_encr =
1662  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
1663  tr_integ =
1664  ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
1665 
1666  ikev2_payload_chain_t *chain = 0;
1667  ikev2_payload_new_chain (chain);
1668 
1669  if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1670  {
1671  if (sa->r_proposals == 0)
1672  {
1673  ikev2_payload_add_notify (chain,
1674  IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1676  }
1677  else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
1678  {
1679  u8 *data = vec_new (u8, 2);
1680  ikev2_sa_transform_t *tr_dh;
1681  tr_dh =
1683  IKEV2_TRANSFORM_TYPE_DH);
1684  ASSERT (tr_dh && tr_dh->dh_type);
1685 
1686  data[0] = (tr_dh->dh_type >> 8) & 0xff;
1687  data[1] = (tr_dh->dh_type) & 0xff;
1688 
1689  ikev2_payload_add_notify (chain,
1690  IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
1691  data);
1692  vec_free (data);
1694  }
1695  else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1696  {
1697  u8 *data = vec_new (u8, 1);
1698 
1699  data[0] = sa->unsupported_cp;
1700  ikev2_payload_add_notify (chain,
1701  IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1702  data);
1703  vec_free (data);
1704  }
1705  else
1706  {
1707  ike->rspi = clib_host_to_net_u64 (sa->rspi);
1708  ikev2_payload_add_sa (chain, sa->r_proposals);
1709  ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
1710  ikev2_payload_add_nonce (chain, sa->r_nonce);
1711  }
1712  }
1713  else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
1714  {
1715  if (sa->state == IKEV2_STATE_AUTHENTICATED)
1716  {
1718  ikev2_payload_add_auth (chain, &sa->r_auth);
1719  ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
1722  }
1723  else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1724  {
1725  ikev2_payload_add_notify (chain,
1726  IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
1727  0);
1729  }
1730  else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
1731  {
1732  ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
1733  0);
1735  ikev2_payload_add_auth (chain, &sa->r_auth);
1736  }
1737  else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
1738  {
1739  ikev2_payload_add_notify (chain,
1740  IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
1742  ikev2_payload_add_auth (chain, &sa->r_auth);
1745  }
1746  else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
1747  {
1748  u8 *data = vec_new (u8, 1);
1749 
1750  data[0] = sa->unsupported_cp;
1751  ikev2_payload_add_notify (chain,
1752  IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1753  data);
1754  vec_free (data);
1755  }
1756  else if (sa->state == IKEV2_STATE_SA_INIT)
1757  {
1759  ikev2_payload_add_auth (chain, &sa->i_auth);
1760  ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
1763  }
1764  else
1765  {
1767  goto done;
1768  }
1769  }
1770  else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
1771  {
1772  /* if pending delete */
1773  if (sa->del)
1774  {
1775  if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
1776  {
1777  if (sa->is_initiator)
1778  ikev2_payload_add_delete (chain, sa->del);
1779 
1780  /* The response to a request that deletes the IKE SA is an empty
1781  INFORMATIONAL response. */
1783  }
1784  /* The response to a request that deletes ESP or AH SAs will contain
1785  delete payloads for the paired SAs going in the other direction. */
1786  else
1787  {
1788  ikev2_payload_add_delete (chain, sa->del);
1789  }
1790  vec_free (sa->del);
1791  sa->del = 0;
1792  }
1793  /* received N(AUTHENTICATION_FAILED) */
1794  else if (sa->state == IKEV2_STATE_AUTH_FAILED)
1795  {
1797  goto done;
1798  }
1799  /* received unsupported critical payload */
1800  else if (sa->unsupported_cp)
1801  {
1802  u8 *data = vec_new (u8, 1);
1803 
1804  data[0] = sa->unsupported_cp;
1805  ikev2_payload_add_notify (chain,
1806  IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1807  data);
1808  vec_free (data);
1809  sa->unsupported_cp = 0;
1810  }
1811  /* else send empty response */
1812  }
1813  else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
1814  {
1815  if (sa->is_initiator)
1816  {
1817 
1818  ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
1819  ikev2_notify_t notify;
1820  u8 *data = vec_new (u8, 4);
1821  memset (&notify, 0, sizeof (notify));
1823  notify.spi = sa->childs[0].i_proposals->spi;
1824  *(u32 *) data = clib_host_to_net_u32 (notify.spi);
1825 
1826  ikev2_payload_add_sa (chain, proposals);
1827  ikev2_payload_add_nonce (chain, sa->i_nonce);
1830  ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
1831  &notify);
1832 
1833  vec_free (data);
1834  }
1835  else
1836  {
1837  if (sa->rekey)
1838  {
1839  ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
1840  ikev2_payload_add_nonce (chain, sa->r_nonce);
1841  ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
1843  ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
1845  vec_del1 (sa->rekey, 0);
1846  }
1847  else if (sa->unsupported_cp)
1848  {
1849  u8 *data = vec_new (u8, 1);
1850 
1851  data[0] = sa->unsupported_cp;
1852  ikev2_payload_add_notify (chain,
1853  IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
1854  data);
1855  vec_free (data);
1856  sa->unsupported_cp = 0;
1857  }
1858  else
1859  {
1860  ikev2_payload_add_notify (chain,
1861  IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
1862  0);
1863  }
1864  }
1865  }
1866 
1867  /* IKEv2 header */
1868  ike->version = IKE_VERSION_2;
1869  ike->nextpayload = IKEV2_PAYLOAD_SK;
1870  tlen = sizeof (*ike);
1871  if (sa->is_initiator)
1872  {
1873  ike->flags = IKEV2_HDR_FLAG_INITIATOR;
1874  sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
1875  }
1876  else
1877  {
1878  ike->flags = IKEV2_HDR_FLAG_RESPONSE;
1879  }
1880 
1881 
1882  if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
1883  {
1884  tlen += vec_len (chain->data);
1885  ike->nextpayload = chain->first_payload_type;
1886  ike->length = clib_host_to_net_u32 (tlen);
1887  clib_memcpy (ike->payload, chain->data, vec_len (chain->data));
1888 
1889  /* store whole IKE payload - needed for PSK auth */
1891  vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
1892  }
1893  else
1894  {
1895 
1896  ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
1897 
1898  /* SK payload */
1899  plen = sizeof (*ph);
1900  ph = (ike_payload_header_t *) & ike->payload[0];
1901  ph->nextpayload = chain->first_payload_type;
1902  ph->flags = 0;
1903  int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
1904  plen += enc_len;
1905 
1906  /* add space for hmac */
1907  plen += tr_integ->key_trunc;
1908  tlen += plen;
1909 
1910  /* payload and total length */
1911  ph->length = clib_host_to_net_u16 (plen);
1912  ike->length = clib_host_to_net_u32 (tlen);
1913 
1914  /* calc integrity data for whole packet except hash itself */
1915  integ =
1916  ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
1917  (u8 *) ike, tlen - tr_integ->key_trunc);
1918 
1919  clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike),
1920  integ, tr_integ->key_trunc);
1921 
1922  /* store whole IKE payload - needed for retransmit */
1924  vec_add (sa->last_res_packet_data, ike, tlen);
1925  }
1926 
1927 done:
1929  vec_free (integ);
1930  return tlen;
1931 }
1932 
1933 static int
1934 ikev2_retransmit_sa_init (ike_header_t * ike,
1935  ip4_address_t iaddr, ip4_address_t raddr)
1936 {
1937  ikev2_main_t *km = &ikev2_main;
1938  ikev2_sa_t *sa;
1939  u32 thread_index = vlib_get_thread_index ();
1940 
1941  /* *INDENT-OFF* */
1942  pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
1943  if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
1944  sa->iaddr.as_u32 == iaddr.as_u32 &&
1945  sa->raddr.as_u32 == raddr.as_u32)
1946  {
1947  int p = 0;
1948  u32 len = clib_net_to_host_u32(ike->length);
1949  u8 payload = ike->nextpayload;
1950 
1951  while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
1952  ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
1953  u32 plen = clib_net_to_host_u16(ikep->length);
1954 
1955  if (plen < sizeof(ike_payload_header_t))
1956  return -1;
1957 
1958  if (payload == IKEV2_PAYLOAD_NONCE)
1959  {
1960  if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
1961  {
1962  /* req is retransmit */
1963  if (sa->state == IKEV2_STATE_SA_INIT)
1964  {
1965  ike_header_t * tmp;
1966  tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
1967  ike->ispi = tmp->ispi;
1968  ike->rspi = tmp->rspi;
1969  ike->nextpayload = tmp->nextpayload;
1970  ike->version = tmp->version;
1971  ike->exchange = tmp->exchange;
1972  ike->flags = tmp->flags;
1973  ike->msgid = tmp->msgid;
1974  ike->length = tmp->length;
1975  clib_memcpy(ike->payload, tmp->payload,
1976  clib_net_to_host_u32(tmp->length) - sizeof(*ike));
1977  clib_warning("IKE_SA_INIT retransmit from %U to %U",
1978  format_ip4_address, &raddr,
1979  format_ip4_address, &iaddr);
1980  return 1;
1981  }
1982  /* else ignore req */
1983  else
1984  {
1985  clib_warning("IKE_SA_INIT ignore from %U to %U",
1986  format_ip4_address, &raddr,
1987  format_ip4_address, &iaddr);
1988  return -1;
1989  }
1990  }
1991  }
1992  payload = ikep->nextpayload;
1993  p+=plen;
1994  }
1995  }
1996  }));
1997  /* *INDENT-ON* */
1998 
1999  /* req is not retransmit */
2000  return 0;
2001 }
2002 
2003 static int
2004 ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
2005 {
2006  u32 msg_id = clib_net_to_host_u32 (ike->msgid);
2007 
2008  /* new req */
2009  if (msg_id > sa->last_msg_id)
2010  {
2011  sa->last_msg_id = msg_id;
2012  return 0;
2013  }
2014  /* retransmitted req */
2015  else if (msg_id == sa->last_msg_id)
2016  {
2017  ike_header_t *tmp;
2018  tmp = (ike_header_t *) sa->last_res_packet_data;
2019  ike->ispi = tmp->ispi;
2020  ike->rspi = tmp->rspi;
2021  ike->nextpayload = tmp->nextpayload;
2022  ike->version = tmp->version;
2023  ike->exchange = tmp->exchange;
2024  ike->flags = tmp->flags;
2025  ike->msgid = tmp->msgid;
2026  ike->length = tmp->length;
2027  clib_memcpy (ike->payload, tmp->payload,
2028  clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
2029  clib_warning ("IKE msgid %u retransmit from %U to %U",
2030  msg_id,
2031  format_ip4_address, &sa->raddr,
2032  format_ip4_address, &sa->iaddr);
2033  return 1;
2034  }
2035  /* old req ignore */
2036  else
2037  {
2038  clib_warning ("IKE msgid %u req ignore from %U to %U",
2039  msg_id,
2040  format_ip4_address, &sa->raddr,
2041  format_ip4_address, &sa->iaddr);
2042  return -1;
2043  }
2044 }
2045 
2046 static uword
2048  vlib_node_runtime_t * node, vlib_frame_t * frame)
2049 {
2050  u32 n_left_from, *from, *to_next;
2051  ikev2_next_t next_index;
2052  ikev2_main_t *km = &ikev2_main;
2053  u32 thread_index = vlib_get_thread_index ();
2054 
2055  from = vlib_frame_vector_args (frame);
2056  n_left_from = frame->n_vectors;
2057  next_index = node->cached_next_index;
2058 
2059  while (n_left_from > 0)
2060  {
2061  u32 n_left_to_next;
2062 
2063  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2064 
2065  while (n_left_from > 0 && n_left_to_next > 0)
2066  {
2067  u32 bi0;
2068  vlib_buffer_t *b0;
2069  u32 next0 = IKEV2_NEXT_ERROR_DROP;
2070  u32 sw_if_index0;
2071  ip4_header_t *ip40;
2072  udp_header_t *udp0;
2073  ike_header_t *ike0;
2074  ikev2_sa_t *sa0 = 0;
2075  ikev2_sa_t sa; /* temporary store for SA */
2076  int len = 0;
2077  int r;
2078 
2079  /* speculatively enqueue b0 to the current next frame */
2080  bi0 = from[0];
2081  to_next[0] = bi0;
2082  from += 1;
2083  to_next += 1;
2084  n_left_from -= 1;
2085  n_left_to_next -= 1;
2086 
2087  b0 = vlib_get_buffer (vm, bi0);
2088  ike0 = vlib_buffer_get_current (b0);
2089  vlib_buffer_advance (b0, -sizeof (*udp0));
2090  udp0 = vlib_buffer_get_current (b0);
2091  vlib_buffer_advance (b0, -sizeof (*ip40));
2092  ip40 = vlib_buffer_get_current (b0);
2093 
2094  if (ike0->version != IKE_VERSION_2)
2095  {
2097  IKEV2_ERROR_NOT_IKEV2, 1);
2098  goto dispatch0;
2099  }
2100 
2101  if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
2102  {
2103  sa0 = &sa;
2104  memset (sa0, 0, sizeof (*sa0));
2105 
2106  if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
2107  {
2108  if (ike0->rspi == 0)
2109  {
2110  sa0->raddr.as_u32 = ip40->dst_address.as_u32;
2111  sa0->iaddr.as_u32 = ip40->src_address.as_u32;
2112 
2113  r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
2114  sa0->raddr);
2115  if (r == 1)
2116  {
2118  IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
2119  1);
2120  len = clib_net_to_host_u32 (ike0->length);
2121  goto dispatch0;
2122  }
2123  else if (r == -1)
2124  {
2126  IKEV2_ERROR_IKE_SA_INIT_IGNORE,
2127  1);
2128  goto dispatch0;
2129  }
2130 
2131  ikev2_process_sa_init_req (vm, sa0, ike0);
2132 
2133  if (sa0->state == IKEV2_STATE_SA_INIT)
2134  {
2136  sa0->r_proposals =
2140  }
2141 
2142  if (sa0->state == IKEV2_STATE_SA_INIT
2144  {
2145  len = ikev2_generate_message (sa0, ike0, 0);
2146  }
2147 
2148  if (sa0->state == IKEV2_STATE_SA_INIT)
2149  {
2150  /* add SA to the pool */
2151  pool_get (km->per_thread_data[thread_index].sas,
2152  sa0);
2153  clib_memcpy (sa0, &sa, sizeof (*sa0));
2154  hash_set (km->
2155  per_thread_data[thread_index].sa_by_rspi,
2156  sa0->rspi,
2157  sa0 -
2158  km->per_thread_data[thread_index].sas);
2159  }
2160  else
2161  {
2162  ikev2_sa_free_all_vec (sa0);
2163  }
2164  }
2165  }
2166  else
2167  {
2168  ikev2_process_sa_init_resp (vm, sa0, ike0);
2169 
2170  if (sa0->state == IKEV2_STATE_SA_INIT)
2171  {
2172  ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
2173  uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2174  if (p)
2175  {
2176  ikev2_sa_t *sai =
2177  pool_elt_at_index (km->sais, p[0]);
2178 
2179  ikev2_complete_sa_data (sa0, sai);
2180  ikev2_calc_keys (sa0);
2181  ikev2_sa_auth_init (sa0);
2182  len = ikev2_generate_message (sa0, ike0, 0);
2183  }
2184  }
2185 
2186  if (sa0->state == IKEV2_STATE_SA_INIT)
2187  {
2188  /* add SA to the pool */
2189  pool_get (km->per_thread_data[thread_index].sas, sa0);
2190  clib_memcpy (sa0, &sa, sizeof (*sa0));
2191  hash_set (km->per_thread_data[thread_index].sa_by_rspi,
2192  sa0->rspi,
2193  sa0 - km->per_thread_data[thread_index].sas);
2194  }
2195  else
2196  {
2197  ikev2_sa_free_all_vec (sa0);
2198  }
2199  }
2200  }
2201  else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
2202  {
2203  uword *p;
2204  p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2205  clib_net_to_host_u64 (ike0->rspi));
2206  if (p)
2207  {
2208  sa0 =
2209  pool_elt_at_index (km->per_thread_data[thread_index].sas,
2210  p[0]);
2211 
2212  r = ikev2_retransmit_resp (sa0, ike0);
2213  if (r == 1)
2214  {
2216  IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2217  1);
2218  len = clib_net_to_host_u32 (ike0->length);
2219  goto dispatch0;
2220  }
2221  else if (r == -1)
2222  {
2224  IKEV2_ERROR_IKE_REQ_IGNORE,
2225  1);
2226  goto dispatch0;
2227  }
2228 
2229  ikev2_process_auth_req (vm, sa0, ike0);
2230  ikev2_sa_auth (sa0);
2231  if (sa0->state == IKEV2_STATE_AUTHENTICATED)
2232  {
2234  ikev2_sa_match_ts (sa0);
2235  if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
2237  &sa0->childs[0]);
2238  }
2239 
2240  if (sa0->is_initiator)
2241  {
2242  uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
2243  if (p)
2244  {
2245  ikev2_sa_t *sai =
2246  pool_elt_at_index (km->sais, p[0]);
2247  hash_unset (km->sa_by_ispi, sai->ispi);
2248  ikev2_sa_free_all_vec (sai);
2249  pool_put (km->sais, sai);
2250  }
2251  }
2252  else
2253  {
2254  len = ikev2_generate_message (sa0, ike0, 0);
2255  }
2256  }
2257  }
2258  else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
2259  {
2260  uword *p;
2261  p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2262  clib_net_to_host_u64 (ike0->rspi));
2263  if (p)
2264  {
2265  sa0 =
2266  pool_elt_at_index (km->per_thread_data[thread_index].sas,
2267  p[0]);
2268 
2269  r = ikev2_retransmit_resp (sa0, ike0);
2270  if (r == 1)
2271  {
2273  IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2274  1);
2275  len = clib_net_to_host_u32 (ike0->length);
2276  goto dispatch0;
2277  }
2278  else if (r == -1)
2279  {
2281  IKEV2_ERROR_IKE_REQ_IGNORE,
2282  1);
2283  goto dispatch0;
2284  }
2285 
2286  ikev2_process_informational_req (vm, sa0, ike0);
2287  if (sa0->del)
2288  {
2289  if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
2290  {
2291  ikev2_delete_t *d, *tmp, *resp = 0;
2292  vec_foreach (d, sa0->del)
2293  {
2294  ikev2_child_sa_t *ch_sa;
2295  ch_sa = ikev2_sa_get_child (sa0, d->spi,
2296  d->protocol_id,
2297  !sa0->is_initiator);
2298  if (ch_sa)
2299  {
2301  sa0, ch_sa);
2302  if (!sa0->is_initiator)
2303  {
2304  vec_add2 (resp, tmp, 1);
2305  tmp->protocol_id = d->protocol_id;
2306  tmp->spi = ch_sa->r_proposals[0].spi;
2307  }
2308  ikev2_sa_del_child_sa (sa0, ch_sa);
2309  }
2310  }
2311  if (!sa0->is_initiator)
2312  {
2313  vec_free (sa0->del);
2314  sa0->del = resp;
2315  }
2316  }
2317  }
2318  if (!sa0->is_initiator)
2319  {
2320  len = ikev2_generate_message (sa0, ike0, 0);
2321  }
2322  }
2323  }
2324  else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
2325  {
2326  uword *p;
2327  p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
2328  clib_net_to_host_u64 (ike0->rspi));
2329  if (p)
2330  {
2331  sa0 =
2332  pool_elt_at_index (km->per_thread_data[thread_index].sas,
2333  p[0]);
2334 
2335  r = ikev2_retransmit_resp (sa0, ike0);
2336  if (r == 1)
2337  {
2339  IKEV2_ERROR_IKE_REQ_RETRANSMIT,
2340  1);
2341  len = clib_net_to_host_u32 (ike0->length);
2342  goto dispatch0;
2343  }
2344  else if (r == -1)
2345  {
2347  IKEV2_ERROR_IKE_REQ_IGNORE,
2348  1);
2349  goto dispatch0;
2350  }
2351 
2352  ikev2_process_create_child_sa_req (vm, sa0, ike0);
2353  if (sa0->rekey)
2354  {
2355  if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
2356  {
2357  ikev2_child_sa_t *child;
2358  vec_add2 (sa0->childs, child, 1);
2359  child->r_proposals = sa0->rekey[0].r_proposal;
2360  child->i_proposals = sa0->rekey[0].i_proposal;
2361  child->tsi = sa0->rekey[0].tsi;
2362  child->tsr = sa0->rekey[0].tsr;
2364  child);
2365  }
2366  if (sa0->is_initiator)
2367  {
2368  vec_del1 (sa0->rekey, 0);
2369  }
2370  else
2371  {
2372  len = ikev2_generate_message (sa0, ike0, 0);
2373  }
2374  }
2375  }
2376  }
2377  else
2378  {
2379  clib_warning ("IKEv2 exchange %u packet received from %U to %U",
2380  ike0->exchange,
2383  }
2384 
2385  dispatch0:
2386  /* if we are sending packet back, rewrite headers */
2387  if (len)
2388  {
2389  next0 = IKEV2_NEXT_IP4_LOOKUP;
2390  if (sa0->is_initiator)
2391  {
2392  ip40->dst_address.as_u32 = sa0->raddr.as_u32;
2393  ip40->src_address.as_u32 = sa0->iaddr.as_u32;
2394  }
2395  else
2396  {
2397  ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
2398  ip40->src_address.as_u32 = sa0->raddr.as_u32;
2399  }
2400  udp0->length =
2401  clib_host_to_net_u16 (len + sizeof (udp_header_t));
2402  udp0->checksum = 0;
2403  b0->current_length =
2404  len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2405  ip40->length = clib_host_to_net_u16 (b0->current_length);
2406  ip40->checksum = ip4_header_checksum (ip40);
2407  }
2408  /* delete sa */
2409  if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
2411  {
2413 
2414  vec_foreach (c, sa0->childs)
2416 
2417  ikev2_delete_sa (sa0);
2418  }
2419  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
2420 
2422  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
2423  {
2424  ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
2425  t->sw_if_index = sw_if_index0;
2426  t->next_index = next0;
2427  }
2428 
2429  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2430  n_left_to_next, bi0, next0);
2431  }
2432 
2433  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2434  }
2435 
2437  IKEV2_ERROR_PROCESSED, frame->n_vectors);
2438  return frame->n_vectors;
2439 }
2440 
2441 /* *INDENT-OFF* */
2442 VLIB_REGISTER_NODE (ikev2_node,static) = {
2443  .function = ikev2_node_fn,
2444  .name = "ikev2",
2445  .vector_size = sizeof (u32),
2446  .format_trace = format_ikev2_trace,
2447  .type = VLIB_NODE_TYPE_INTERNAL,
2448 
2449  .n_errors = ARRAY_LEN(ikev2_error_strings),
2450  .error_strings = ikev2_error_strings,
2451 
2452  .n_next_nodes = IKEV2_N_NEXT,
2453 
2454  .next_nodes = {
2455  [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
2456  [IKEV2_NEXT_ERROR_DROP] = "error-drop",
2457  },
2458 };
2459 /* *INDENT-ON* */
2460 
2461 
2462 static clib_error_t *
2464  ikev2_transforms_set * ts,
2465  ikev2_sa_proposal_t ** proposals, int is_ike)
2466 {
2467  clib_error_t *r;
2468  ikev2_main_t *km = &ikev2_main;
2469  ikev2_sa_proposal_t *proposal;
2470  vec_add2 (*proposals, proposal, 1);
2472  int error;
2473 
2474  /* Encryption */
2475  error = 1;
2477  {
2478  if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
2479  && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC
2480  && td->key_len == ts->crypto_key_size / 8)
2481  {
2482  u16 attr[2];
2483  attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
2484  attr[1] = clib_host_to_net_u16 (td->key_len << 3);
2485  vec_add (td->attrs, (u8 *) attr, 4);
2486  vec_add1 (proposal->transforms, *td);
2487  td->attrs = 0;
2488 
2489  error = 0;
2490  break;
2491  }
2492  }
2493  if (error)
2494  {
2495  r = clib_error_return (0, "Unsupported algorithm");
2496  return r;
2497  }
2498 
2499  /* Integrity */
2500  error = 1;
2502  {
2503  if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
2504  && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96)
2505  {
2506  vec_add1 (proposal->transforms, *td);
2507  error = 0;
2508  break;
2509  }
2510  }
2511  if (error)
2512  {
2513  r = clib_error_return (0, "Unsupported algorithm");
2514  return r;
2515  }
2516 
2517  /* PRF */
2518  if (is_ike)
2519  {
2520  error = 1;
2522  {
2523  if (td->type == IKEV2_TRANSFORM_TYPE_PRF
2524  && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1)
2525  {
2526  vec_add1 (proposal->transforms, *td);
2527  error = 0;
2528  break;
2529  }
2530  }
2531  if (error)
2532  {
2533  r = clib_error_return (0, "Unsupported algorithm");
2534  return r;
2535  }
2536  }
2537 
2538  /* DH */
2539  error = 1;
2541  {
2542  if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
2543  {
2544  vec_add1 (proposal->transforms, *td);
2545  if (is_ike)
2546  {
2547  sa->dh_group = td->dh_type;
2548  }
2549  error = 0;
2550  break;
2551  }
2552  }
2553  if (error)
2554  {
2555  r = clib_error_return (0, "Unsupported algorithm");
2556  return r;
2557  }
2558 
2559  if (!is_ike)
2560  {
2561  error = 1;
2563  {
2564  if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
2565  {
2566  vec_add1 (proposal->transforms, *td);
2567  error = 0;
2568  break;
2569  }
2570  }
2571  if (error)
2572  {
2573  r = clib_error_return (0, "Unsupported algorithm");
2574  return r;
2575  }
2576  }
2577 
2578 
2579  return 0;
2580 }
2581 
2582 static ikev2_profile_t *
2584 {
2585  ikev2_main_t *km = &ikev2_main;
2586  uword *p;
2587 
2588  p = mhash_get (&km->profile_index_by_name, name);
2589  if (!p)
2590  return 0;
2591 
2592  return pool_elt_at_index (km->profiles, p[0]);
2593 }
2594 
2595 
2596 static void
2598  u32 bi0, u32 len)
2599 {
2600  ip4_header_t *ip40;
2601  udp_header_t *udp0;
2602  vlib_buffer_t *b0;
2603  vlib_frame_t *f;
2604  u32 *to_next;
2605 
2606  b0 = vlib_get_buffer (vm, bi0);
2607  vlib_buffer_advance (b0, -sizeof (udp_header_t));
2608  udp0 = vlib_buffer_get_current (b0);
2609  vlib_buffer_advance (b0, -sizeof (ip4_header_t));
2610  ip40 = vlib_buffer_get_current (b0);
2611 
2612 
2613  ip40->ip_version_and_header_length = 0x45;
2614  ip40->tos = 0;
2615  ip40->fragment_id = 0;
2616  ip40->flags_and_fragment_offset = 0;
2617  ip40->ttl = 0xff;
2618  ip40->protocol = IP_PROTOCOL_UDP;
2619  ip40->dst_address.as_u32 = dst->as_u32;
2620  ip40->src_address.as_u32 = src->as_u32;
2621  udp0->dst_port = clib_host_to_net_u16 (500);
2622  udp0->src_port = clib_host_to_net_u16 (500);
2623  udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
2624  udp0->checksum = 0;
2625  b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
2626  ip40->length = clib_host_to_net_u16 (b0->current_length);
2627  ip40->checksum = ip4_header_checksum (ip40);
2628 
2629 
2630  /* send the request */
2631  f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
2632  to_next = vlib_frame_vector_args (f);
2633  to_next[0] = bi0;
2634  f->n_vectors = 1;
2635  vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
2636 
2637 }
2638 
2639 static u32
2641 {
2642  u32 bi0;
2643  if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2644  {
2645  *ike = 0;
2646  return 0;
2647  }
2648  vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
2649  *ike = vlib_buffer_get_current (b0);
2650  return bi0;
2651 }
2652 
2653 clib_error_t *
2655 {
2656  ikev2_main_t *km = &ikev2_main;
2657 
2658  km->pkey = ikev2_load_key_file (file);
2659  if (km->pkey == NULL)
2660  return clib_error_return (0, "load key '%s' failed", file);
2661 
2662  return 0;
2663 }
2664 
2665 clib_error_t *
2666 ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
2667 {
2668  ikev2_main_t *km = &ikev2_main;
2669  ikev2_profile_t *p;
2670 
2671  if (is_add)
2672  {
2673  if (ikev2_profile_index_by_name (name))
2674  return clib_error_return (0, "policy %v already exists", name);
2675 
2676  pool_get (km->profiles, p);
2677  memset (p, 0, sizeof (*p));
2678  p->name = vec_dup (name);
2679  p->responder.sw_if_index = ~0;
2680  uword index = p - km->profiles;
2681  mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
2682  }
2683  else
2684  {
2685  p = ikev2_profile_index_by_name (name);
2686  if (!p)
2687  return clib_error_return (0, "policy %v does not exists", name);
2688 
2689  vec_free (p->name);
2690  pool_put (km->profiles, p);
2691  mhash_unset (&km->profile_index_by_name, name, 0);
2692  }
2693  return 0;
2694 }
2695 
2696 clib_error_t *
2697 ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
2698  u8 * auth_data, u8 data_hex_format)
2699 {
2700  ikev2_profile_t *p;
2701  clib_error_t *r;
2702 
2703  p = ikev2_profile_index_by_name (name);
2704 
2705  if (!p)
2706  {
2707  r = clib_error_return (0, "unknown profile %v", name);
2708  return r;
2709  }
2710  vec_free (p->auth.data);
2711  p->auth.method = auth_method;
2712  p->auth.data = vec_dup (auth_data);
2713  p->auth.hex = data_hex_format;
2714 
2715  if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
2716  {
2717  vec_add1 (p->auth.data, 0);
2718  if (p->auth.key)
2719  EVP_PKEY_free (p->auth.key);
2720  p->auth.key = ikev2_load_cert_file (auth_data);
2721  if (p->auth.key == NULL)
2722  return clib_error_return (0, "load cert '%s' failed", auth_data);
2723  }
2724 
2725  return 0;
2726 }
2727 
2728 clib_error_t *
2729 ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
2730  int is_local)
2731 {
2732  ikev2_profile_t *p;
2733  clib_error_t *r;
2734 
2735  if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
2736  && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
2737  {
2738  r = clib_error_return (0, "unsupported identity type %U",
2739  format_ikev2_id_type, id_type);
2740  return r;
2741  }
2742 
2743  p = ikev2_profile_index_by_name (name);
2744 
2745  if (!p)
2746  {
2747  r = clib_error_return (0, "unknown profile %v", name);
2748  return r;
2749  }
2750 
2751  if (is_local)
2752  {
2753  vec_free (p->loc_id.data);
2754  p->loc_id.type = id_type;
2755  p->loc_id.data = vec_dup (data);
2756  }
2757  else
2758  {
2759  vec_free (p->rem_id.data);
2760  p->rem_id.type = id_type;
2761  p->rem_id.data = vec_dup (data);
2762  }
2763 
2764  return 0;
2765 }
2766 
2767 clib_error_t *
2768 ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
2769  u16 start_port, u16 end_port, ip4_address_t start_addr,
2770  ip4_address_t end_addr, int is_local)
2771 {
2772  ikev2_profile_t *p;
2773  clib_error_t *r;
2774 
2775  p = ikev2_profile_index_by_name (name);
2776 
2777  if (!p)
2778  {
2779  r = clib_error_return (0, "unknown profile %v", name);
2780  return r;
2781  }
2782 
2783  if (is_local)
2784  {
2785  p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
2786  p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
2787  p->loc_ts.start_port = start_port;
2788  p->loc_ts.end_port = end_port;
2789  p->loc_ts.protocol_id = protocol_id;
2790  p->loc_ts.ts_type = 7;
2791  }
2792  else
2793  {
2794  p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
2795  p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
2796  p->rem_ts.start_port = start_port;
2797  p->rem_ts.end_port = end_port;
2798  p->rem_ts.protocol_id = protocol_id;
2799  p->rem_ts.ts_type = 7;
2800  }
2801 
2802  return 0;
2803 }
2804 
2805 
2806 clib_error_t *
2808  u32 sw_if_index, ip4_address_t ip4)
2809 {
2810  ikev2_profile_t *p;
2811  clib_error_t *r;
2812 
2813  p = ikev2_profile_index_by_name (name);
2814 
2815  if (!p)
2816  {
2817  r = clib_error_return (0, "unknown profile %v", name);
2818  return r;
2819  }
2820 
2821  p->responder.sw_if_index = sw_if_index;
2822  p->responder.ip4 = ip4;
2823 
2824  return 0;
2825 }
2826 
2827 clib_error_t *
2829  ikev2_transform_encr_type_t crypto_alg,
2830  ikev2_transform_integ_type_t integ_alg,
2831  ikev2_transform_dh_type_t dh_type,
2832  u32 crypto_key_size)
2833 {
2834  ikev2_profile_t *p;
2835  clib_error_t *r;
2836 
2837  p = ikev2_profile_index_by_name (name);
2838 
2839  if (!p)
2840  {
2841  r = clib_error_return (0, "unknown profile %v", name);
2842  return r;
2843  }
2844 
2845  p->ike_ts.crypto_alg = crypto_alg;
2846  p->ike_ts.integ_alg = integ_alg;
2847  p->ike_ts.dh_type = dh_type;
2848  p->ike_ts.crypto_key_size = crypto_key_size;
2849  return 0;
2850 }
2851 
2852 clib_error_t *
2854  ikev2_transform_encr_type_t crypto_alg,
2855  ikev2_transform_integ_type_t integ_alg,
2856  ikev2_transform_dh_type_t dh_type,
2857  u32 crypto_key_size)
2858 {
2859  ikev2_profile_t *p;
2860  clib_error_t *r;
2861 
2862  p = ikev2_profile_index_by_name (name);
2863 
2864  if (!p)
2865  {
2866  r = clib_error_return (0, "unknown profile %v", name);
2867  return r;
2868  }
2869 
2870  p->esp_ts.crypto_alg = crypto_alg;
2871  p->esp_ts.integ_alg = integ_alg;
2872  p->esp_ts.dh_type = dh_type;
2873  p->esp_ts.crypto_key_size = crypto_key_size;
2874  return 0;
2875 }
2876 
2877 clib_error_t *
2879  u64 lifetime, u32 jitter, u32 handover,
2880  u64 maxdata)
2881 {
2882  ikev2_profile_t *p;
2883  clib_error_t *r;
2884 
2885  p = ikev2_profile_index_by_name (name);
2886 
2887  if (!p)
2888  {
2889  r = clib_error_return (0, "unknown profile %v", name);
2890  return r;
2891  }
2892 
2893  p->lifetime = lifetime;
2894  p->lifetime_jitter = jitter;
2895  p->handover = handover;
2896  p->lifetime_maxdata = maxdata;
2897  return 0;
2898 }
2899 
2900 clib_error_t *
2902 {
2903  ikev2_profile_t *p;
2904  clib_error_t *r;
2905  ip4_main_t *im = &ip4_main;
2906  ikev2_main_t *km = &ikev2_main;
2907 
2908  p = ikev2_profile_index_by_name (name);
2909 
2910  if (!p)
2911  {
2912  r = clib_error_return (0, "unknown profile %v", name);
2913  return r;
2914  }
2915 
2916  if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
2917  {
2918  r = clib_error_return (0, "responder not set for profile %v", name);
2919  return r;
2920  }
2921 
2922 
2923  /* Create the Initiator Request */
2924  {
2925  ike_header_t *ike0;
2926  u32 bi0 = 0;
2927  ip_lookup_main_t *lm = &im->lookup_main;
2928  u32 if_add_index0;
2929  int len = sizeof (ike_header_t);
2930 
2931  /* Get own iface IP */
2932  if_add_index0 =
2934  ip_interface_address_t *if_add =
2935  pool_elt_at_index (lm->if_address_pool, if_add_index0);
2936  ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
2937 
2938  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
2939 
2940  /* Prepare the SA and the IKE payload */
2941  ikev2_sa_t sa;
2942  memset (&sa, 0, sizeof (ikev2_sa_t));
2943  ikev2_payload_chain_t *chain = 0;
2944  ikev2_payload_new_chain (chain);
2945 
2946  /* Build the IKE proposal payload */
2947  ikev2_sa_proposal_t *proposals = 0;
2948  ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
2949  proposals[0].proposal_num = 1;
2950  proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
2951 
2952  /* Add and then cleanup proposal data */
2953  ikev2_payload_add_sa (chain, proposals);
2954  ikev2_sa_free_proposal_vector (&proposals);
2955 
2956  sa.is_initiator = 1;
2957  sa.profile = p;
2960  ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
2961  ikev2_payload_add_nonce (chain, sa.i_nonce);
2962 
2963  /* Build the child SA proposal */
2964  vec_resize (sa.childs, 1);
2965  ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
2966  &sa.childs[0].i_proposals, 0);
2967  sa.childs[0].i_proposals[0].proposal_num = 1;
2969  RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
2970  sizeof (sa.childs[0].i_proposals[0].spi));
2971 
2972 
2973 
2974  /* Add NAT detection notification messages (mandatory) */
2975  u8 nat_detection_source[8 + 8 + 4 + 2];
2976  u8 *nat_detection_sha1 = vec_new (u8, 20);
2977 
2978  u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
2979  clib_memcpy (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
2980  tmpspi = clib_host_to_net_u64 (sa.rspi);
2981  clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
2982  u16 tmpport = clib_host_to_net_u16 (500);
2983  clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport,
2984  sizeof (tmpport));
2985  u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
2986  clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2987  SHA1 (nat_detection_source, sizeof (nat_detection_source),
2988  nat_detection_sha1);
2989  ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
2990  nat_detection_sha1);
2991  tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
2992  clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
2993  SHA1 (nat_detection_source, sizeof (nat_detection_source),
2994  nat_detection_sha1);
2995  ikev2_payload_add_notify (chain,
2996  IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
2997  nat_detection_sha1);
2998  vec_free (nat_detection_sha1);
2999 
3000  u8 *sig_hash_algo = vec_new (u8, 8);
3001  u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
3002  clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig));
3003  ikev2_payload_add_notify (chain,
3004  IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
3005  sig_hash_algo);
3006  vec_free (sig_hash_algo);
3007 
3008 
3009  /* Buffer update and bolierplate */
3010  len += vec_len (chain->data);
3011  ike0->nextpayload = chain->first_payload_type;
3012  ike0->length = clib_host_to_net_u32 (len);
3013  clib_memcpy (ike0->payload, chain->data, vec_len (chain->data));
3015 
3016  ike0->version = IKE_VERSION_2;
3017  ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3018  ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
3019  ike0->ispi = sa.ispi;
3020 
3021  /* store whole IKE payload - needed for PSK auth */
3023  vec_add (sa.last_sa_init_req_packet_data, ike0, len);
3024 
3025  /* add data to the SA then add it to the pool */
3026  sa.iaddr.as_u32 = if_ip->as_u32;
3027  sa.raddr.as_u32 = p->responder.ip4.as_u32;
3028  sa.i_id.type = p->loc_id.type;
3029  sa.i_id.data = vec_dup (p->loc_id.data);
3030  sa.i_auth.method = p->auth.method;
3031  sa.i_auth.hex = p->auth.hex;
3032  sa.i_auth.data = vec_dup (p->auth.data);
3033 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
3034  clib_memcpy (sa.i_auth.key, p->auth.key, EVP_PKEY_size (p->auth.key));
3035 #else
3036  sa.i_auth.key = vec_dup (p->auth.key);
3037 #endif
3038  vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
3039  vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
3040 
3041  /* add SA to the pool */
3042  ikev2_sa_t *sa0 = 0;
3043  pool_get (km->sais, sa0);
3044  clib_memcpy (sa0, &sa, sizeof (*sa0));
3045  hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
3046 
3047  ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
3048 
3049  }
3050 
3051  return 0;
3052 }
3053 
3054 static void
3056  ikev2_child_sa_t * csa)
3057 {
3058  /* Create the Initiator notification for child SA removal */
3059  ikev2_main_t *km = &ikev2_main;
3060  ike_header_t *ike0;
3061  u32 bi0 = 0;
3062  int len;
3063 
3064  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3065 
3066 
3067  ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3068  ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3069  ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3070  vec_resize (sa->del, 1);
3072  sa->del->spi = csa->i_proposals->spi;
3073  ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3074  sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3075  len = ikev2_generate_message (sa, ike0, 0);
3076 
3077  ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3078 
3079  /* delete local child SA */
3081  ikev2_sa_del_child_sa (sa, csa);
3082 }
3083 
3084 clib_error_t *
3086 {
3087  clib_error_t *r;
3088  ikev2_main_t *km = &ikev2_main;
3090  ikev2_sa_t *fsa = 0;
3091  ikev2_child_sa_t *fchild = 0;
3092 
3093  /* Search for the child SA */
3094  vec_foreach (tkm, km->per_thread_data)
3095  {
3096  ikev2_sa_t *sa;
3097  if (fchild)
3098  break;
3099  /* *INDENT-OFF* */
3100  pool_foreach (sa, tkm->sas, ({
3101  fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3102  if (fchild)
3103  {
3104  fsa = sa;
3105  break;
3106  }
3107  }));
3108  /* *INDENT-ON* */
3109  }
3110 
3111  if (!fchild || !fsa)
3112  {
3113  r = clib_error_return (0, "Child SA not found");
3114  return r;
3115  }
3116  else
3117  {
3118  ikev2_delete_child_sa_internal (vm, fsa, fchild);
3119  }
3120 
3121  return 0;
3122 }
3123 
3124 clib_error_t *
3126 {
3127  clib_error_t *r;
3128  ikev2_main_t *km = &ikev2_main;
3130  ikev2_sa_t *fsa = 0;
3131  ikev2_main_per_thread_data_t *ftkm = 0;
3132 
3133  /* Search for the IKE SA */
3134  vec_foreach (tkm, km->per_thread_data)
3135  {
3136  ikev2_sa_t *sa;
3137  if (fsa)
3138  break;
3139  /* *INDENT-OFF* */
3140  pool_foreach (sa, tkm->sas, ({
3141  if (sa->ispi == ispi)
3142  {
3143  fsa = sa;
3144  ftkm = tkm;
3145  break;
3146  }
3147  }));
3148  /* *INDENT-ON* */
3149  }
3150 
3151  if (!fsa)
3152  {
3153  r = clib_error_return (0, "IKE SA not found");
3154  return r;
3155  }
3156 
3157 
3158  /* Create the Initiator notification for IKE SA removal */
3159  {
3160  ike_header_t *ike0;
3161  u32 bi0 = 0;
3162  int len;
3163 
3164  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3165 
3166 
3167  ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
3168  ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
3169  ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
3170  vec_resize (fsa->del, 1);
3171  fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
3172  fsa->del->spi = ispi;
3173  ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
3174  fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3175  len = ikev2_generate_message (fsa, ike0, 0);
3176 
3177  ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
3178  }
3179 
3180 
3181  /* delete local SA */
3183  vec_foreach (c, fsa->childs)
3184  {
3185  ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
3186  ikev2_sa_del_child_sa (fsa, c);
3187  }
3188  ikev2_sa_free_all_vec (fsa);
3189  uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
3190  if (p)
3191  {
3192  hash_unset (ftkm->sa_by_rspi, fsa->rspi);
3193  pool_put (ftkm->sas, fsa);
3194  }
3195 
3196 
3197  return 0;
3198 }
3199 
3200 static void
3202  ikev2_child_sa_t * csa)
3203 {
3204  /* Create the Initiator request for create child SA */
3205  ike_header_t *ike0;
3206  u32 bi0 = 0;
3207  int len;
3208 
3209 
3210  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
3211 
3212 
3213  ike0->version = IKE_VERSION_2;
3214  ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
3215  ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
3216  ike0->ispi = clib_host_to_net_u64 (sa->ispi);
3217  ike0->rspi = clib_host_to_net_u64 (sa->rspi);
3218  ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
3219  sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
3220 
3221  ikev2_rekey_t *rekey;
3222  vec_add2 (sa->rekey, rekey, 1);
3223  ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
3224 
3225  /*need new ispi */
3226  RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
3227  rekey->spi = proposals[0].spi;
3228  rekey->ispi = csa->i_proposals->spi;
3229  len = ikev2_generate_message (sa, ike0, proposals);
3230  ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
3231  vec_free (proposals);
3232 }
3233 
3234 clib_error_t *
3236 {
3237  clib_error_t *r;
3238  ikev2_main_t *km = &ikev2_main;
3240  ikev2_sa_t *fsa = 0;
3241  ikev2_child_sa_t *fchild = 0;
3242 
3243  /* Search for the child SA */
3244  vec_foreach (tkm, km->per_thread_data)
3245  {
3246  ikev2_sa_t *sa;
3247  if (fchild)
3248  break;
3249  /* *INDENT-OFF* */
3250  pool_foreach (sa, tkm->sas, ({
3251  fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
3252  if (fchild)
3253  {
3254  fsa = sa;
3255  break;
3256  }
3257  }));
3258  /* *INDENT-ON* */
3259  }
3260 
3261  if (!fchild || !fsa)
3262  {
3263  r = clib_error_return (0, "Child SA not found");
3264  return r;
3265  }
3266  else
3267  {
3268  ikev2_rekey_child_sa_internal (vm, fsa, fchild);
3269  }
3270 
3271  return 0;
3272 }
3273 
3274 clib_error_t *
3276 {
3277  ikev2_main_t *km = &ikev2_main;
3278  clib_error_t *error;
3280  int thread_id;
3281 
3282  memset (km, 0, sizeof (ikev2_main_t));
3283  km->vnet_main = vnet_get_main ();
3284  km->vlib_main = vm;
3285 
3286  ikev2_crypto_init (km);
3287 
3289 
3290  vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
3291  for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
3292  {
3293  km->per_thread_data[thread_id].sa_by_rspi =
3294  hash_create (0, sizeof (uword));
3295  }
3296 
3297  km->sa_by_ispi = hash_create (0, sizeof (uword));
3298 
3299 
3300  if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
3301  return error;
3302 
3303  udp_register_dst_port (vm, 500, ikev2_node.index, 1);
3304 
3305  return 0;
3306 }
3307 
3308 
3309 static u8
3311 {
3312  ikev2_main_t *km = &ikev2_main;
3313  vlib_main_t *vm = km->vlib_main;
3314  f64 now = vlib_time_now (vm);
3315  u8 res = 0;
3316 
3317  if (sa->is_initiator && sa->profile && csa->time_to_expiration
3318  && now > csa->time_to_expiration)
3319  {
3320  if (!csa->is_expired || csa->rekey_retries > 0)
3321  {
3322  ikev2_rekey_child_sa_internal (vm, sa, csa);
3323  csa->time_to_expiration = now + sa->profile->handover;
3324  csa->is_expired = 1;
3325  if (csa->rekey_retries == 0)
3326  {
3327  csa->rekey_retries = 5;
3328  }
3329  else if (csa->rekey_retries > 0)
3330  {
3331  csa->rekey_retries--;
3332  clib_warning ("Rekeing Child SA 0x%x, retries left %d",
3333  csa->i_proposals->spi, csa->rekey_retries);
3334  if (csa->rekey_retries == 0)
3335  {
3336  csa->rekey_retries = -1;
3337  }
3338  }
3339  res |= 1;
3340  }
3341  else
3342  {
3343  csa->time_to_expiration = 0;
3344  ikev2_delete_child_sa_internal (vm, sa, csa);
3345  res |= 1;
3346  }
3347  }
3348 
3349  return res;
3350 }
3351 
3352 static void
3354 {
3355  ikev2_main_t *km = &ikev2_main;
3356  vlib_main_t *vm = km->vlib_main;
3358  ikev2_sa_t *fsa = 0;
3359  ikev2_child_sa_t *fchild = 0;
3360  f64 now = vlib_time_now (vm);
3361 
3362  /* Search for the SA and child SA */
3363  vec_foreach (tkm, km->per_thread_data)
3364  {
3365  ikev2_sa_t *sa;
3366  if (fchild)
3367  break;
3368  /* *INDENT-OFF* */
3369  pool_foreach (sa, tkm->sas, ({
3370  fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
3371  if (fchild)
3372  {
3373  fsa = sa;
3374  break;
3375  }
3376  }));
3377  /* *INDENT-ON* */
3378  }
3379 
3380  if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
3381  {
3382  if (!fchild->is_expired
3383  && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata)
3384  {
3385  fchild->time_to_expiration = now;
3386  }
3387  }
3388 }
3389 
3391 
3392 static uword
3394  vlib_frame_t * f)
3395 {
3396  ikev2_main_t *km = &ikev2_main;
3397  ipsec_main_t *im = &ipsec_main;
3398 
3399  while (1)
3400  {
3401  u8 req_sent = 0;
3404 
3405  /* process ike child sas */
3407  vec_foreach (tkm, km->per_thread_data)
3408  {
3409  ikev2_sa_t *sa;
3410  /* *INDENT-OFF* */
3411  pool_foreach (sa, tkm->sas, ({
3412  ikev2_child_sa_t *c;
3413  vec_foreach (c, sa->childs)
3414  {
3415  req_sent |= ikev2_mngr_process_child_sa(sa, c);
3416  }
3417  }));
3418  /* *INDENT-ON* */
3419  }
3420 
3421  /* process ipsec sas */
3422  ipsec_sa_t *sa;
3423  /* *INDENT-OFF* */
3424  pool_foreach (sa, im->sad, ({
3425  ikev2_mngr_process_ipsec_sa(sa);
3426  }));
3427  /* *INDENT-ON* */
3428 
3429  if (req_sent)
3430  {
3433  req_sent = 0;
3434  }
3435 
3436  }
3437  return 0;
3438 }
3439 
3440 /* *INDENT-OFF* */
3442  .function = ikev2_mngr_process_fn,
3443  .type = VLIB_NODE_TYPE_PROCESS,
3444  .name =
3445  "ikev2-manager-process",
3446 };
3447 
3448 /* *INDENT-ON* */
3449 
3450 /*
3451  * fd.io coding-style-patch-verification: ON
3452  *
3453  * Local Variables:
3454  * eval: (c-set-style "gnu")
3455  * End:
3456  */
ikev2_main_per_thread_data_t * per_thread_data
Definition: ikev2_priv.h:291
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:432
static int ikev2_retransmit_sa_init(ike_header_t *ike, ip4_address_t iaddr, ip4_address_t raddr)
Definition: ikev2.c:1934
u8 * dh_shared_key
Definition: ikev2_priv.h:211
ikev2_sa_t * sais
Definition: ikev2_priv.h:287
void ikev2_payload_add_nonce(ikev2_payload_chain_t *c, u8 *nonce)
static u8 * format_ikev2_trace(u8 *s, va_list *args)
Definition: ikev2.c:45
u8 * dh_private_key
Definition: ikev2_priv.h:212
ikev2_transform_type_t type
Definition: ikev2_priv.h:69
#define hash_set(h, key, value)
Definition: hash.h:254
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:337
#define IKEV2_PAYLOAD_NONCE
Definition: ikev2.h:99
clib_error_t * ikev2_set_profile_responder(vlib_main_t *vm, u8 *name, u32 sw_if_index, ip4_address_t ip4)
Definition: ikev2.c:2807
ikev2_id_t r_id
Definition: ikev2_priv.h:235
ikev2_id_type_t type
Definition: ikev2_priv.h:127
#define CLIB_UNUSED(x)
Definition: clib.h:79
void ikev2_payload_add_notify(ikev2_payload_chain_t *c, u16 msg_type, u8 *data)
ikev2_transforms_set ike_ts
Definition: ikev2_priv.h:189
static int ikev2_delete_tunnel_interface(vnet_main_t *vnm, ikev2_sa_t *sa, ikev2_child_sa_t *child)
Definition: ikev2.c:1620
static f64 vlib_process_wait_for_event_or_clock(vlib_main_t *vm, f64 dt)
Suspend a cooperative multi-tasking thread Waits for an event, or for the indicated number of seconds...
Definition: node_funcs.h:699
ikev2_transform_integ_type_t
Definition: ikev2.h:267
#define hash_unset(h, key)
Definition: hash.h:260
a
Definition: bitmap.h:516
static void ikev2_send_ike(vlib_main_t *vm, ip4_address_t *src, ip4_address_t *dst, u32 bi0, u32 len)
Definition: ikev2.c:2597
ip4_address_t src_address
Definition: ip4_packet.h:164
clib_error_t * ikev2_add_del_profile(vlib_main_t *vm, u8 *name, int is_add)
Definition: ikev2.c:2666
EVP_PKEY * pkey
Definition: ikev2_priv.h:280
ip_interface_address_t * if_address_pool
Pool of addresses that are assigned to interfaces.
Definition: lookup.h:122
void ikev2_payload_add_sa(ikev2_payload_chain_t *c, ikev2_sa_proposal_t *proposals)
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
static void ikev2_calc_keys(ikev2_sa_t *sa)
Definition: ikev2.c:432
ikev2_sa_proposal_t * ikev2_parse_sa_payload(ike_payload_header_t *ikep)
u32 last_init_msg_id
Definition: ikev2_priv.h:252
static u32 ikev2_generate_message(ikev2_sa_t *sa, ike_header_t *ike, void *user)
Definition: ikev2.c:1653
ikev2_transform_dh_type_t dh_type
Definition: ikev2_priv.h:120
#define IKEV2_PAYLOAD_NONE
Definition: ikev2.h:93
ikev2_profile_t * profiles
Definition: ikev2_priv.h:271
u8 v8
Definition: ikev2.h:27
clib_error_t * ikev2_initiate_delete_ike_sa(vlib_main_t *vm, u64 ispi)
Definition: ikev2.c:3125
ikev2_ts_t * ikev2_parse_ts_payload(ike_payload_header_t *ikep)
#define NULL
Definition: clib.h:55
uword mhash_unset(mhash_t *h, void *key, uword *old_value)
Definition: mhash.c:353
v8 * ikev2_calc_prf(ikev2_sa_transform_t *tr, v8 *key, v8 *data)
Definition: ikev2_crypto.c:257
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:224
static void ikev2_complete_sa_data(ikev2_sa_t *sa, ikev2_sa_t *sai)
Definition: ikev2.c:376
static vlib_node_registration_t ikev2_mngr_process_node
(constructor) VLIB_REGISTER_NODE (ikev2_mngr_process_node)
Definition: ikev2.c:3390
#define IKEV2_EXCHANGE_SA_INIT
Definition: ikev2.h:82
static void ikev2_delete_child_sa_internal(vlib_main_t *vm, ikev2_sa_t *sa, ikev2_child_sa_t *csa)
Definition: ikev2.c:3055
ikev2_transform_esn_type_t esn_type
Definition: ikev2_priv.h:77
#define IKEV2_PAYLOAD_VENDOR
Definition: ikev2.h:102
ikev2_state_t state
Definition: ikev2_priv.h:199
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:518
ikev2_transform_encr_type_t crypto_alg
Definition: ikev2_priv.h:118
struct _vlib_node_registration vlib_node_registration_t
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:557
u8 * sk_pi
Definition: ikev2_priv.h:226
static void mhash_init_vec_string(mhash_t *h, uword n_value_bytes)
Definition: mhash.h:84
ip_lookup_main_t lookup_main
Definition: ip4.h:97
ip4_address_t ip4
Definition: ikev2_priv.h:113
clib_error_t * ikev2_set_profile_sa_lifetime(vlib_main_t *vm, u8 *name, u64 lifetime, u32 jitter, u32 handover, u64 maxdata)
Definition: ikev2.c:2878
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
u16 flags_and_fragment_offset
Definition: ip4_packet.h:145
void ikev2_payload_add_ke(ikev2_payload_chain_t *c, u16 dh_group, u8 *dh_data)
ikev2_next_t
Definition: ikev2.c:80
static void ikev2_generate_sa_init_data(ikev2_sa_t *sa)
Definition: ikev2.c:323
#define IKEV2_NONCE_SIZE
Definition: ikev2.h:23
u8 initial_contact
Definition: ikev2_priv.h:201
ikev2_ts_t * tsi
Definition: ikev2_priv.h:166
#define IKEV2_PAYLOAD_TSR
Definition: ikev2.h:104
ikev2_auth_t r_auth
Definition: ikev2_priv.h:231
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:225
static void ikev2_delete_sa(ikev2_sa_t *sa)
Definition: ikev2.c:306
u8 * last_sa_init_res_packet_data
Definition: ikev2_priv.h:245
ikev2_notify_t * ikev2_parse_notify_payload(ike_payload_header_t *ikep)
ikev2_profile_t * profile
Definition: ikev2_priv.h:253
ikev2_sa_transform_t * ikev2_sa_get_td_for_type(ikev2_sa_proposal_t *p, ikev2_transform_type_t type)
Definition: ikev2.c:192
ikev2_auth_t auth
Definition: ikev2_priv.h:183
ikev2_ts_t * tsr
Definition: ikev2_priv.h:167
vlib_node_registration_t ip4_lookup_node
(constructor) VLIB_REGISTER_NODE (ip4_lookup_node)
Definition: ip4_forward.c:474
static void ikev2_mngr_process_ipsec_sa(ipsec_sa_t *ipsec_sa)
Definition: ikev2.c:3353
ikev2_id_t rem_id
Definition: ikev2_priv.h:185
#define vec_add(V, E, N)
Add N elements to end of vector V (no header, unspecified alignment)
Definition: vec.h:595
ikev2_transform_dh_type_t
Definition: ikev2.h:317
int ikev2_encrypt_data(ikev2_sa_t *sa, v8 *src, u8 *dst)
Definition: ikev2_crypto.c:412
ikev2_child_sa_t * ikev2_sa_get_child(ikev2_sa_t *sa, u32 spi, ikev2_protocol_id_t prot_id, int by_initiator)
Definition: ikev2.c:209
format_function_t format_ip4_address
Definition: format.h:79
u32 next_index
Definition: ikev2.c:40
u32 last_msg_id
Definition: ikev2_priv.h:248
#define IKEV2_PAYLOAD_DELETE
Definition: ikev2.h:101
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:438
ikev2_sa_proposal_t * r_proposals
Definition: ikev2_priv.h:135
void ikev2_generate_dh(ikev2_sa_t *sa, ikev2_sa_transform_t *t)
Definition: ikev2_crypto.c:448
static uword vlib_process_get_events(vlib_main_t *vm, uword **data_vector)
Return the first event type which has occurred and a vector of per-event data of that type...
Definition: node_funcs.h:542
ipsec_main_t ipsec_main
Definition: ipsec.c:28
EVP_PKEY * ikev2_load_cert_file(u8 *file)
Definition: ikev2_crypto.c:725
clib_error_t * ikev2_initiate_sa_init(vlib_main_t *vm, u8 *name)
Definition: ikev2.c:2901
static ikev2_sa_transform_t * ikev2_find_transform_data(ikev2_sa_transform_t *t)
Definition: ikev2.c:88
ip4_address_t dst_address
Definition: ip4_packet.h:164
#define vec_new(T, N)
Create new vector of given type and length (unspecified alignment, no header).
Definition: vec.h:306
EVP_PKEY * ikev2_load_key_file(u8 *file)
Definition: ikev2_crypto.c:755
clib_error_t * ikev2_set_profile_auth(vlib_main_t *vm, u8 *name, u8 auth_method, u8 *auth_data, u8 data_hex_format)
Definition: ikev2.c:2697
void ikev2_parse_vendor_payload(ike_payload_header_t *ikep)
ip4_address_t start_addr
Definition: ikev2_priv.h:106
ip4_address_t remote_ip
Definition: ipsec.h:161
u8 * format_hex_bytes(u8 *s, va_list *va)
Definition: std-formats.c:84
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:182
#define clib_error_return(e, args...)
Definition: error.h:99
static u32 ikev2_get_new_ike_header_buff(vlib_main_t *vm, ike_header_t **ike)
Definition: ikev2.c:2640
void ikev2_payload_add_id(ikev2_payload_chain_t *c, ikev2_id_t *id, u8 type)
#define IKEV2_PAYLOAD_NOTIFY
Definition: ikev2.h:100
static void ikev2_sa_match_ts(ikev2_sa_t *sa)
Definition: ikev2.c:1242
unsigned long u64
Definition: types.h:89
ikev2_sa_proposal_t * i_proposals
Definition: ikev2_priv.h:217
clib_error_t * ikev2_set_profile_esp_transforms(vlib_main_t *vm, u8 *name, ikev2_transform_encr_type_t crypto_alg, ikev2_transform_integ_type_t integ_alg, ikev2_transform_dh_type_t dh_type, u32 crypto_key_size)
Definition: ikev2.c:2853
static void ikev2_sa_auth(ikev2_sa_t *sa)
Definition: ikev2.c:1309
#define vec_resize(V, N)
Resize a vector (no header, unspecified alignment) Add N elements to end of given vector V...
Definition: vec.h:237
ikev2_transform_integ_type_t integ_alg
Definition: ikev2_priv.h:119
ikev2_auth_t i_auth
Definition: ikev2_priv.h:230
#define vlib_call_init_function(vm, x)
Definition: init.h:162
#define ikev2_set_state(sa, v)
Definition: ikev2.c:33
#define ikev2_payload_destroy_chain(V)
Definition: ikev2_priv.h:326
ikev2_id_t loc_id
Definition: ikev2_priv.h:184
ikev2_sa_transform_t * transforms
Definition: ikev2_priv.h:96
#define IKEV2_EXCHANGE_CREATE_CHILD_SA
Definition: ikev2.h:84
u8 * sk_ar
Definition: ikev2_priv.h:223
u8 * r_dh_data
Definition: ikev2_priv.h:214
static void ikev2_initial_contact_cleanup(ikev2_sa_t *sa)
Definition: ikev2.c:776
ikev2_responder_t responder
Definition: ikev2_priv.h:188
static ikev2_profile_t * ikev2_profile_index_by_name(u8 *name)
Definition: ikev2.c:2583
#define hash_get(h, key)
Definition: hash.h:248
clib_error_t * ikev2_set_profile_id(vlib_main_t *vm, u8 *name, u8 id_type, u8 *data, int is_local)
Definition: ikev2.c:2729
u8 * ikev2_calc_prfplus(ikev2_sa_transform_t *tr, u8 *key, u8 *seed, int len)
Definition: ikev2_crypto.c:286
static clib_error_t * ikev2_set_initiator_proposals(vlib_main_t *vm, ikev2_sa_t *sa, ikev2_transforms_set *ts, ikev2_sa_proposal_t **proposals, int is_ike)
Definition: ikev2.c:2463
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:459
ikev2_main_t ikev2_main
Definition: ikev2.c:27
vlib_main_t * vlib_main
Definition: vnet.h:78
u8 * last_sa_init_req_packet_data
Definition: ikev2_priv.h:244
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:72
#define IKEV2_PAYLOAD_IDR
Definition: ikev2.h:97
static int ikev2_create_tunnel_interface(vnet_main_t *vnm, ikev2_sa_t *sa, ikev2_child_sa_t *child)
Definition: ikev2.c:1476
#define IKEV2_PAYLOAD_SA
Definition: ikev2.h:94
ikev2_ts_t rem_ts
Definition: ikev2_priv.h:187
u8 * i_dh_data
Definition: ikev2_priv.h:213
uword mhash_set_mem(mhash_t *h, void *key, uword *new_value, uword *old_value)
Definition: mhash.c:271
#define v
Definition: acl.c:341
ikev2_sa_proposal_t * i_proposals
Definition: ikev2_priv.h:134
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:191
u8 * r_nonce
Definition: ikev2_priv.h:207
#define IKEV2_HDR_FLAG_RESPONSE
Definition: ikev2.h:89
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:195
mhash_t profile_index_by_name
Definition: ikev2_priv.h:277
u16 end_port
Definition: ikev2_priv.h:105
ikev2_sa_transform_t * supported_transforms
Definition: ikev2_priv.h:274
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:271
ikev2_rekey_t * rekey
Definition: ikev2_priv.h:241
#define vec_dup(V)
Return copy of vector (no header, no alignment)
Definition: vec.h:370
clib_error_t * ikev2_initiate_delete_child_sa(vlib_main_t *vm, u32 ispi)
Definition: ikev2.c:3085
static void ikev2_rekey_child_sa_internal(vlib_main_t *vm, ikev2_sa_t *sa, ikev2_child_sa_t *csa)
Definition: ikev2.c:3201
#define PREDICT_FALSE(x)
Definition: clib.h:105
#define vec_del1(v, i)
Delete the element at index I.
Definition: vec.h:801
#define IKEV2_PAYLOAD_FLAG_CRITICAL
Definition: ikev2.h:91
static void ikev2_sa_auth_init(ikev2_sa_t *sa)
Definition: ikev2.c:1432
ikev2_protocol_id_t
Definition: ikev2.h:107
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:364
ip4_address_t end_addr
Definition: ikev2_priv.h:107
ip4_address_t iaddr
Definition: ikev2_priv.h:202
u8 * i_nonce
Definition: ikev2_priv.h:206
clib_error_t * ikev2_set_local_key(vlib_main_t *vm, u8 *file)
Definition: ikev2.c:2654
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1158
clib_error_t * ikev2_set_profile_ts(vlib_main_t *vm, u8 *name, u8 protocol_id, u16 start_port, u16 end_port, ip4_address_t start_addr, ip4_address_t end_addr, int is_local)
Definition: ikev2.c:2768
u8 * sk_ei
Definition: ikev2_priv.h:224
#define IKEV2_EXCHANGE_INFORMATIONAL
Definition: ikev2.h:85
void ikev2_payload_add_delete(ikev2_payload_chain_t *c, ikev2_delete_t *d)
#define IKEV2_HDR_FLAG_INITIATOR
Definition: ikev2.h:87
#define IKEV2_KEY_PAD
Definition: ikev2.h:25
static uword ikev2_mngr_process_fn(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
Definition: ikev2.c:3393
clib_error_t * ikev2_initiate_rekey_child_sa(vlib_main_t *vm, u32 ispi)
Definition: ikev2.c:3235
ipsec_crypto_alg_t crypto_alg
Definition: ipsec.h:164
ikev2_transform_dh_type_t dh_type
Definition: ikev2_priv.h:76
svmdb_client_t * c
u16 n_vectors
Definition: node.h:344
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:221
vlib_main_t * vm
Definition: buffer.c:283
static u8 * ikev2_decrypt_sk_payload(ikev2_sa_t *sa, ike_header_t *ike, u8 *payload)
Definition: ikev2.c:711
static void ikev2_sa_del_child_sa(ikev2_sa_t *sa, ikev2_child_sa_t *child)
Definition: ikev2.c:262
ikev2_auth_method_t method
Definition: ikev2_priv.h:55
ikev2_transform_encr_type_t
Definition: ikev2.h:226
ikev2_delete_t * del
Definition: ikev2_priv.h:238
ikev2_ts_t * tsi
Definition: ikev2_priv.h:138
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:336
static void ikev2_process_auth_req(vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:815
static uword ikev2_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ikev2.c:2047
ip4_address_t raddr
Definition: ikev2_priv.h:203
#define clib_warning(format, args...)
Definition: error.h:59
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:93
#define clib_memcpy(a, b, c)
Definition: string.h:75
u8 * sk_er
Definition: ikev2_priv.h:225
static void ikev2_process_sa_init_resp(vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:631
u8 is_initiator
Definition: ikev2_priv.h:251
#define ARRAY_LEN(x)
Definition: clib.h:59
#define IKEV2_PAYLOAD_KE
Definition: ikev2.h:95
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:454
ikev2_ts_t loc_ts
Definition: ikev2_priv.h:186
ikev2_sa_proposal_t * r_proposals
Definition: ikev2_priv.h:218
static u8 * ikev2_sa_generate_authmsg(ikev2_sa_t *sa, int is_responder)
Definition: ikev2.c:1187
static void ikev2_calc_child_keys(ikev2_sa_t *sa, ikev2_child_sa_t *child)
Definition: ikev2.c:509
u32 * if_address_pool_index_by_sw_if_index
Head of doubly linked list of interface addresses for each software interface.
Definition: lookup.h:129
#define hash_create(elts, value_bytes)
Definition: hash.h:681
void ikev2_payload_add_auth(ikev2_payload_chain_t *c, ikev2_auth_t *auth)
ikev2_protocol_id_t protocol_id
Definition: ikev2_priv.h:94
u8 protocol_id
Definition: ikev2_priv.h:102
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:456
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
static uword * mhash_get(mhash_t *h, const void *key)
Definition: mhash.h:110
vnet_main_t * vnet_main
Definition: ikev2_priv.h:284
static void ikev2_process_informational_req(vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:975
ipsec_integ_alg_t integ_alg
Definition: ipsec.h:169
ip4_address_t local_ip
Definition: ipsec.h:161
void ikev2_sa_free_proposal_vector(ikev2_sa_proposal_t **v)
Definition: ikev2.c:225
ipsec_sa_t * sad
Definition: ipsec.h:258
#define IKEV2_PAYLOAD_AUTH
Definition: ikev2.h:98
IPv4 main type.
Definition: ip4.h:95
#define ikev2_payload_new_chain(V)
Definition: ikev2_priv.h:325
#define IKEV2_PAYLOAD_SK
Definition: ikev2.h:105
ikev2_sa_proposal_t * r_proposal
Definition: ikev2_priv.h:165
u8 * sk_ai
Definition: ikev2_priv.h:222
#define IKE_VERSION_2
Definition: ikev2.h:80
void ikev2_complete_dh(ikev2_sa_t *sa, ikev2_sa_transform_t *t)
Definition: ikev2_crypto.c:580
#define vec_append(v1, v2)
Append v2 after v1.
Definition: vec.h:815
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:208
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:259
static vlib_node_registration_t ikev2_node
(constructor) VLIB_REGISTER_NODE (ikev2_node)
Definition: ikev2.c:56
u16 dh_group
Definition: ikev2_priv.h:210
ikev2_sa_proposal_t * i_proposal
Definition: ikev2_priv.h:164
#define IKEV2_PAYLOAD_TSI
Definition: ikev2.h:103
EVP_PKEY * key
Definition: ikev2_priv.h:58
static int ikev2_retransmit_resp(ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:2004
u64 uword
Definition: types.h:112
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
ikev2_transform_encr_type_t encr_type
Definition: ikev2_priv.h:73
u8 * last_res_packet_data
Definition: ikev2_priv.h:249
ikev2_transform_integ_type_t integ_type
Definition: ikev2_priv.h:75
static char * ikev2_error_strings[]
Definition: ikev2.c:74
unsigned short u16
Definition: types.h:57
static void ikev2_process_sa_init_req(vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:556
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
double f64
Definition: types.h:142
u16 start_port
Definition: ikev2_priv.h:104
unsigned char u8
Definition: types.h:56
void ikev2_payload_chain_add_padding(ikev2_payload_chain_t *c, int bs)
u8 * sk_pr
Definition: ikev2_priv.h:227
#define IKEV2_PAYLOAD_IDI
Definition: ikev2.h:96
clib_error_t * ikev2_set_profile_ike_transforms(vlib_main_t *vm, u8 *name, ikev2_transform_encr_type_t crypto_alg, ikev2_transform_integ_type_t integ_alg, ikev2_transform_dh_type_t dh_type, u32 crypto_key_size)
Definition: ikev2.c:2828
ikev2_id_t i_id
Definition: ikev2_priv.h:234
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
static void ikev2_process_create_child_sa_req(vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike)
Definition: ikev2.c:1046
ikev2_ts_t * tsr
Definition: ikev2_priv.h:139
ikev2_child_sa_t * childs
Definition: ikev2_priv.h:255
ikev2_transform_prf_type_t prf_type
Definition: ikev2_priv.h:74
Linear Congruential Random Number Generator.
#define IKEV2_EXCHANGE_IKE_AUTH
Definition: ikev2.h:83
static int ikev2_ts_cmp(ikev2_ts_t *ts1, ikev2_ts_t *ts2)
Definition: ikev2.c:1230
#define vnet_buffer(b)
Definition: buffer.h:326
clib_error_t * ikev2_init(vlib_main_t *vm)
Definition: ikev2.c:3275
static u32 random_u32(u32 *seed)
32-bit random number generator
Definition: random.h:69
ikev2_error_t
Definition: ikev2.c:66
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1181
clib_error_t * ikev2_cli_init(vlib_main_t *vm)
Definition: ikev2_cli.c:589
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
static u8 ikev2_mngr_process_child_sa(ikev2_sa_t *sa, ikev2_child_sa_t *csa)
Definition: ikev2.c:3310
uword * sa_by_ispi
Definition: ikev2_priv.h:289
#define vec_foreach(var, vec)
Vector iterator.
u8 unsupported_cp
Definition: ikev2_priv.h:200
static void ikev2_sa_free_all_child_sa(ikev2_child_sa_t **childs)
Definition: ikev2.c:245
u16 flags
Copy of main node flags.
Definition: node.h:450
int ipsec_add_del_tunnel_if(ipsec_add_del_tunnel_args_t *args)
Definition: ipsec_if.c:143
static ikev2_sa_proposal_t * ikev2_select_proposal(ikev2_sa_proposal_t *proposals, ikev2_protocol_id_t prot_id)
Definition: ikev2.c:116
void udp_register_dst_port(vlib_main_t *vm, udp_dst_port_t dst_port, u32 node_index, u8 is_ip4)
Definition: udp_local.c:492
u8 ip_version_and_header_length
Definition: ip4_packet.h:132
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:172
ikev2_transform_type_t
Definition: ikev2.h:203
ikev2_transforms_set esp_ts
Definition: ikev2_priv.h:190
void ikev2_crypto_init(ikev2_main_t *km)
Definition: ikev2_crypto.c:777
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:75
void ikev2_payload_add_ts(ikev2_payload_chain_t *c, ikev2_ts_t *ts, u8 type)
static u32 vlib_buffer_alloc(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Allocate buffers into supplied array.
Definition: buffer_funcs.h:341
vlib_main_t * vlib_main
Definition: ikev2_priv.h:283
v8 * ikev2_decrypt_data(ikev2_sa_t *sa, u8 *data, int len)
Definition: ikev2_crypto.c:362
static void ikev2_sa_free_all_vec(ikev2_sa_t *sa)
Definition: ikev2.c:275
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
static u16 ip4_header_checksum(ip4_header_t *i)
Definition: ip4_packet.h:239
u8 * ikev2_calc_sign(EVP_PKEY *pkey, u8 *data)
Definition: ikev2_crypto.c:694
v8 * ikev2_calc_integr(ikev2_sa_transform_t *tr, v8 *key, u8 *data, int len)
Definition: ikev2_crypto.c:328
u8 * format_ikev2_id_type(u8 *s, va_list *args)
Definition: defs.h:46
#define foreach_ikev2_error
Definition: ikev2.c:58
u32 sw_if_index
Definition: ikev2.c:41
void ikev2_payload_add_notify_2(ikev2_payload_chain_t *c, u16 msg_type, u8 *data, ikev2_notify_t *notify)
ikev2_delete_t * ikev2_parse_delete_payload(ike_payload_header_t *ikep)