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* Move /kernel to /boot/kernel and /modules to /boot/modules.
[dragonfly.git] / sys / netproto / key / key.c
blobc2a0fd5b75db629077e597ed828e24e52737922b
1 /* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
2 /* $DragonFly: src/sys/netproto/key/key.c,v 1.21 2008/06/08 08:38:05 sephe Exp $ */
3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
4
5 /*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * This code is referd to RFC 2367
36 */
37
38 #include "opt_inet.h"
39 #include "opt_inet6.h"
40 #include "opt_ipsec.h"
41
42 #include <sys/types.h>
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/mbuf.h>
47 #include <sys/domain.h>
48 #include <sys/protosw.h>
49 #include <sys/malloc.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/sysctl.h>
53 #include <sys/errno.h>
54 #include <sys/proc.h>
55 #include <sys/queue.h>
56 #include <sys/syslog.h>
57 #include <sys/thread2.h>
58
59 #include <net/if.h>
60 #include <net/route.h>
61 #include <net/raw_cb.h>
62
63 #include <netinet/in.h>
64 #include <netinet/in_systm.h>
65 #include <netinet/ip.h>
66 #include <netinet/in_var.h>
67
68 #ifdef INET6
69 #include <netinet/ip6.h>
70 #include <netinet6/in6_var.h>
71 #include <netinet6/ip6_var.h>
72 #endif /* INET6 */
73
74 #ifdef INET
75 #include <netinet/in_pcb.h>
76 #endif
77 #ifdef INET6
78 #include <netinet6/in6_pcb.h>
79 #endif /* INET6 */
80
81 #include <net/pfkeyv2.h>
82 #include "keydb.h"
83 #include "key.h"
84 #include "keysock.h"
85 #include "key_debug.h"
86
87 #include <netinet6/ipsec.h>
88 #ifdef INET6
89 #include <netinet6/ipsec6.h>
90 #endif
91 #include <netinet6/ah.h>
92 #ifdef INET6
93 #include <netinet6/ah6.h>
94 #endif
95 #ifdef IPSEC_ESP
96 #include <netinet6/esp.h>
97 #ifdef INET6
98 #include <netinet6/esp6.h>
99 #endif
100 #endif
101 #include <netinet6/ipcomp.h>
102 #ifdef INET6
103 #include <netinet6/ipcomp6.h>
104 #endif
105
106 #include <machine/stdarg.h>
107
108 /* randomness */
109 #include <sys/random.h>
110
111 #include <net/net_osdep.h>
112
113 #ifndef satosin
114 #define satosin(s) ((struct sockaddr_in *)s)
115 #endif
116
117 #define FULLMASK 0xff
118
119 /*
120 * Note on SA reference counting:
121 * - SAs that are not in DEAD state will have (total external reference + 1)
122 * following value in reference count field. they cannot be freed and are
123 * referenced from SA header.
124 * - SAs that are in DEAD state will have (total external reference)
125 * in reference count field. they are ready to be freed. reference from
126 * SA header will be removed in key_delsav(), when the reference count
127 * field hits 0 (= no external reference other than from SA header.
128 */
129
130 #ifndef IPSEC_DEBUG2
131 static struct callout key_timehandler_ch;
132 #endif
133 u_int32_t key_debug_level = 0;
134 static u_int key_spi_trycnt = 1000;
135 static u_int32_t key_spi_minval = 0x100;
136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
137 static u_int32_t policy_id = 0;
138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
142 static int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/
143
144 static u_int32_t acq_seq = 0;
145 static int key_tick_init_random = 0;
146
147 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
148 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
149 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
150 /* registed list */
151 #ifndef IPSEC_NONBLOCK_ACQUIRE
152 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
153 #endif
154 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
155
156 struct key_cb key_cb;
157
158 /* search order for SAs */
159 static const u_int saorder_state_valid_prefer_old[] = {
160 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
161 };
162 static const u_int saorder_state_valid_prefer_new[] = {
163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
164 };
165 static const u_int saorder_state_alive[] = {
166 /* except DEAD */
167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
168 };
169 static const u_int saorder_state_any[] = {
170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
171 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
172 };
173
174 static const int minsize[] = {
175 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
176 sizeof(struct sadb_sa), /* SADB_EXT_SA */
177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
178 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
181 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
183 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
184 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
185 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
186 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
187 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
188 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
189 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
190 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
191 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
192 0, /* SADB_X_EXT_KMPRIVATE */
193 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
194 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
195 };
196 static const int maxsize[] = {
197 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
198 sizeof(struct sadb_sa), /* SADB_EXT_SA */
199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
200 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
202 0, /* SADB_EXT_ADDRESS_SRC */
203 0, /* SADB_EXT_ADDRESS_DST */
204 0, /* SADB_EXT_ADDRESS_PROXY */
205 0, /* SADB_EXT_KEY_AUTH */
206 0, /* SADB_EXT_KEY_ENCRYPT */
207 0, /* SADB_EXT_IDENTITY_SRC */
208 0, /* SADB_EXT_IDENTITY_DST */
209 0, /* SADB_EXT_SENSITIVITY */
210 0, /* SADB_EXT_PROPOSAL */
211 0, /* SADB_EXT_SUPPORTED_AUTH */
212 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
213 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
214 0, /* SADB_X_EXT_KMPRIVATE */
215 0, /* SADB_X_EXT_POLICY */
216 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
217 };
218
219 static int ipsec_esp_keymin = 256;
220 static int ipsec_esp_auth = 0;
221 static int ipsec_ah_keymin = 128;
222
223 #ifdef SYSCTL_DECL
224 SYSCTL_DECL(_net_key);
225 #endif
226
227 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
228 &key_debug_level, 0, "");
229
230 /* max count of trial for the decision of spi value */
231 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
232 &key_spi_trycnt, 0, "");
233
234 /* minimum spi value to allocate automatically. */
235 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
236 &key_spi_minval, 0, "");
237
238 /* maximun spi value to allocate automatically. */
239 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
240 &key_spi_maxval, 0, "");
241
242 /* interval to initialize randseed */
243 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
244 &key_int_random, 0, "");
245
246 /* lifetime for larval SA */
247 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
248 &key_larval_lifetime, 0, "");
249
250 /* counter for blocking to send SADB_ACQUIRE to IKEd */
251 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
252 &key_blockacq_count, 0, "");
253
254 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
255 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
256 &key_blockacq_lifetime, 0, "");
257
258 /* ESP auth */
259 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
260 &ipsec_esp_auth, 0, "");
261
262 /* minimum ESP key length */
263 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
264 &ipsec_esp_keymin, 0, "");
265
266 /* minimum AH key length */
267 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
268 &ipsec_ah_keymin, 0, "");
269
270 /* perfered old SA rather than new SA */
271 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
272 &key_preferred_oldsa, 0, "");
273
274 #ifndef LIST_FOREACH
275 #define LIST_FOREACH(elm, head, field) \
276 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
277 #endif
278 #define __LIST_CHAINED(elm) \
279 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
280 #define LIST_INSERT_TAIL(head, elm, type, field) \
281 do {\
282 struct type *curelm = LIST_FIRST(head); \
283 if (curelm == NULL) {\
284 LIST_INSERT_HEAD(head, elm, field); \
285 } else { \
286 while (LIST_NEXT(curelm, field)) \
287 curelm = LIST_NEXT(curelm, field);\
288 LIST_INSERT_AFTER(curelm, elm, field);\
289 }\
290 } while (0)
291
292 #define KEY_CHKSASTATE(head, sav, name) \
293 do { \
294 if ((head) != (sav)) { \
295 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
296 (name), (head), (sav))); \
297 continue; \
298 } \
299 } while (0)
300
301 #define KEY_CHKSPDIR(head, sp, name) \
302 do { \
303 if ((head) != (sp)) { \
304 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
305 "anyway continue.\n", \
306 (name), (head), (sp))); \
307 } \
308 } while (0)
309
310 #if 1
311 #define KMALLOC(p, t, n) \
312 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
313 #define KFREE(p) \
314 kfree((caddr_t)(p), M_SECA);
315 #else
316 #define KMALLOC(p, t, n) \
317 do { \
318 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
319 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
320 __FILE__, __LINE__, (p), #t, n); \
321 } while (0)
322
323 #define KFREE(p) \
324 do { \
325 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
326 kfree((caddr_t)(p), M_SECA); \
327 } while (0)
328 #endif
329
330 /*
331 * set parameters into secpolicyindex buffer.
332 * Must allocate secpolicyindex buffer passed to this function.
333 */
334 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
335 do { \
336 bzero((idx), sizeof(struct secpolicyindex)); \
337 (idx)->dir = (_dir); \
338 (idx)->prefs = (ps); \
339 (idx)->prefd = (pd); \
340 (idx)->ul_proto = (ulp); \
341 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
342 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
343 } while (0)
344
345 /*
346 * set parameters into secasindex buffer.
347 * Must allocate secasindex buffer before calling this function.
348 */
349 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
350 do { \
351 bzero((idx), sizeof(struct secasindex)); \
352 (idx)->proto = (p); \
353 (idx)->mode = (m); \
354 (idx)->reqid = (r); \
355 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
356 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
357 } while (0)
358
359 /* key statistics */
360 struct _keystat {
361 u_long getspi_count; /* the avarage of count to try to get new SPI */
362 } keystat;
363
364 struct sadb_msghdr {
365 struct sadb_msg *msg;
366 struct sadb_ext *ext[SADB_EXT_MAX + 1];
367 int extoff[SADB_EXT_MAX + 1];
368 int extlen[SADB_EXT_MAX + 1];
369 };
370
371 static struct secasvar *key_allocsa_policy (struct secasindex *);
372 static void key_freesp_so (struct secpolicy **);
373 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
374 static void key_delsp (struct secpolicy *);
375 static struct secpolicy *key_getsp (struct secpolicyindex *);
376 static struct secpolicy *key_getspbyid (u_int32_t);
377 static u_int32_t key_newreqid (void);
378 static struct mbuf *key_gather_mbuf (struct mbuf *,
379 const struct sadb_msghdr *, int, int, ...);
380 static int key_spdadd (struct socket *, struct mbuf *,
381 const struct sadb_msghdr *);
382 static u_int32_t key_getnewspid (void);
383 static int key_spddelete (struct socket *, struct mbuf *,
384 const struct sadb_msghdr *);
385 static int key_spddelete2 (struct socket *, struct mbuf *,
386 const struct sadb_msghdr *);
387 static int key_spdget (struct socket *, struct mbuf *,
388 const struct sadb_msghdr *);
389 static int key_spdflush (struct socket *, struct mbuf *,
390 const struct sadb_msghdr *);
391 static int key_spddump (struct socket *, struct mbuf *,
392 const struct sadb_msghdr *);
393 static struct mbuf *key_setdumpsp (struct secpolicy *,
394 u_int8_t, u_int32_t, u_int32_t);
395 static u_int key_getspreqmsglen (struct secpolicy *);
396 static int key_spdexpire (struct secpolicy *);
397 static struct secashead *key_newsah (struct secasindex *);
398 static void key_delsah (struct secashead *);
399 static struct secasvar *key_newsav (struct mbuf *,
400 const struct sadb_msghdr *, struct secashead *, int *);
401 static void key_delsav (struct secasvar *);
402 static struct secashead *key_getsah (struct secasindex *);
403 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
404 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
405 static int key_setsaval (struct secasvar *, struct mbuf *,
406 const struct sadb_msghdr *);
407 static int key_mature (struct secasvar *);
408 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
409 u_int8_t, u_int32_t, u_int32_t);
410 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
411 u_int32_t, pid_t, u_int16_t);
412 static struct mbuf *key_setsadbsa (struct secasvar *);
413 static struct mbuf *key_setsadbaddr (u_int16_t,
414 struct sockaddr *, u_int8_t, u_int16_t);
415 #if 0
416 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
417 int, u_int64_t);
418 #endif
419 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
420 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
421 u_int32_t);
422 static void *key_newbuf (const void *, u_int);
423 #ifdef INET6
424 static int key_ismyaddr6 (struct sockaddr_in6 *);
425 #endif
426
427 /* flags for key_cmpsaidx() */
428 #define CMP_HEAD 1 /* protocol, addresses. */
429 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
430 #define CMP_REQID 3 /* additionally HEAD, reaid. */
431 #define CMP_EXACTLY 4 /* all elements. */
432 static int key_cmpsaidx
433 (struct secasindex *, struct secasindex *, int);
434
435 static int key_cmpspidx_exactly
436 (struct secpolicyindex *, struct secpolicyindex *);
437 static int key_cmpspidx_withmask
438 (struct secpolicyindex *, struct secpolicyindex *);
439 static int key_sockaddrcmp (struct sockaddr *, struct sockaddr *, int);
440 static int key_bbcmp (caddr_t, caddr_t, u_int);
441 static void key_srandom (void);
442 static u_int16_t key_satype2proto (u_int8_t);
443 static u_int8_t key_proto2satype (u_int16_t);
444
445 static int key_getspi (struct socket *, struct mbuf *,
446 const struct sadb_msghdr *);
447 static u_int32_t key_do_getnewspi (struct sadb_spirange *,
448 struct secasindex *);
449 static int key_update (struct socket *, struct mbuf *,
450 const struct sadb_msghdr *);
451 #ifdef IPSEC_DOSEQCHECK
452 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
453 #endif
454 static int key_add (struct socket *, struct mbuf *,
455 const struct sadb_msghdr *);
456 static int key_setident (struct secashead *, struct mbuf *,
457 const struct sadb_msghdr *);
458 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
459 const struct sadb_msghdr *);
460 static int key_delete (struct socket *, struct mbuf *,
461 const struct sadb_msghdr *);
462 static int key_get (struct socket *, struct mbuf *,
463 const struct sadb_msghdr *);
464
465 static void key_getcomb_setlifetime (struct sadb_comb *);
466 #ifdef IPSEC_ESP
467 static struct mbuf *key_getcomb_esp (void);
468 #endif
469 static struct mbuf *key_getcomb_ah (void);
470 static struct mbuf *key_getcomb_ipcomp (void);
471 static struct mbuf *key_getprop (const struct secasindex *);
472
473 static int key_acquire (struct secasindex *, struct secpolicy *);
474 #ifndef IPSEC_NONBLOCK_ACQUIRE
475 static struct secacq *key_newacq (struct secasindex *);
476 static struct secacq *key_getacq (struct secasindex *);
477 static struct secacq *key_getacqbyseq (u_int32_t);
478 #endif
479 static struct secspacq *key_newspacq (struct secpolicyindex *);
480 static struct secspacq *key_getspacq (struct secpolicyindex *);
481 static int key_acquire2 (struct socket *, struct mbuf *,
482 const struct sadb_msghdr *);
483 static int key_register (struct socket *, struct mbuf *,
484 const struct sadb_msghdr *);
485 static int key_expire (struct secasvar *);
486 static int key_flush (struct socket *, struct mbuf *,
487 const struct sadb_msghdr *);
488 static int key_dump (struct socket *, struct mbuf *,
489 const struct sadb_msghdr *);
490 static int key_promisc (struct socket *, struct mbuf *,
491 const struct sadb_msghdr *);
492 static int key_senderror (struct socket *, struct mbuf *, int);
493 static int key_validate_ext (const struct sadb_ext *, int);
494 static int key_align (struct mbuf *, struct sadb_msghdr *);
495 #if 0
496 static const char *key_getfqdn (void);
497 static const char *key_getuserfqdn (void);
498 #endif
499 static void key_sa_chgstate (struct secasvar *, u_int8_t);
500 static struct mbuf *key_alloc_mbuf (int);
501
502 /* %%% IPsec policy management */
503 /*
504 * allocating a SP for OUTBOUND or INBOUND packet.
505 * Must call key_freesp() later.
506 * OUT: NULL: not found
507 * others: found and return the pointer.
508 */
509 struct secpolicy *
510 key_allocsp(struct secpolicyindex *spidx, u_int dir)
511 {
512 struct secpolicy *sp;
513 struct timeval tv;
514
515 /* sanity check */
516 if (spidx == NULL)
517 panic("key_allocsp: NULL pointer is passed.\n");
518
519 /* check direction */
520 switch (dir) {
521 case IPSEC_DIR_INBOUND:
522 case IPSEC_DIR_OUTBOUND:
523 break;
524 default:
525 panic("key_allocsp: Invalid direction is passed.\n");
526 }
527
528 /* get a SP entry */
529 crit_enter();
530 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
531 kprintf("*** objects\n");
532 kdebug_secpolicyindex(spidx));
533
534 LIST_FOREACH(sp, &sptree[dir], chain) {
535 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
536 kprintf("*** in SPD\n");
537 kdebug_secpolicyindex(&sp->spidx));
538
539 if (sp->state == IPSEC_SPSTATE_DEAD)
540 continue;
541 if (key_cmpspidx_withmask(&sp->spidx, spidx))
542 goto found;
543 }
544
545 crit_exit();
546 return NULL;
547
548 found:
549 /* sanity check */
550 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
551
552 /* found a SPD entry */
553 microtime(&tv);
554 sp->lastused = tv.tv_sec;
555 sp->refcnt++;
556 crit_exit();
557 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
558 kprintf("DP key_allocsp cause refcnt++:%d SP:%p\n",
559 sp->refcnt, sp));
560
561 return sp;
562 }
563
564 /*
565 * return a policy that matches this particular inbound packet.
566 * XXX slow
567 */
568 struct secpolicy *
569 key_gettunnel(struct sockaddr *osrc, struct sockaddr *odst,
570 struct sockaddr *isrc, struct sockaddr *idst)
571 {
572 struct secpolicy *sp;
573 const int dir = IPSEC_DIR_INBOUND;
574 struct timeval tv;
575 struct ipsecrequest *r1, *r2, *p;
576 struct sockaddr *os, *od, *is, *id;
577 struct secpolicyindex spidx;
578
579 if (isrc->sa_family != idst->sa_family) {
580 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
581 isrc->sa_family, idst->sa_family));
582 return NULL;
583 }
584
585 crit_enter();
586 LIST_FOREACH(sp, &sptree[dir], chain) {
587 if (sp->state == IPSEC_SPSTATE_DEAD)
588 continue;
589
590 r1 = r2 = NULL;
591 for (p = sp->req; p; p = p->next) {
592 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
593 continue;
594
595 r1 = r2;
596 r2 = p;
597
598 if (!r1) {
599 /* here we look at address matches only */
600 spidx = sp->spidx;
601 if (isrc->sa_len > sizeof(spidx.src) ||
602 idst->sa_len > sizeof(spidx.dst))
603 continue;
604 bcopy(isrc, &spidx.src, isrc->sa_len);
605 bcopy(idst, &spidx.dst, idst->sa_len);
606 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
607 continue;
608 } else {
609 is = (struct sockaddr *)&r1->saidx.src;
610 id = (struct sockaddr *)&r1->saidx.dst;
611 if (key_sockaddrcmp(is, isrc, 0) ||
612 key_sockaddrcmp(id, idst, 0))
613 continue;
614 }
615
616 os = (struct sockaddr *)&r2->saidx.src;
617 od = (struct sockaddr *)&r2->saidx.dst;
618 if (key_sockaddrcmp(os, osrc, 0) ||
619 key_sockaddrcmp(od, odst, 0))
620 continue;
621
622 goto found;
623 }
624 }
625 crit_exit();
626 return NULL;
627
628 found:
629 microtime(&tv);
630 sp->lastused = tv.tv_sec;
631 sp->refcnt++;
632 crit_exit();
633 return sp;
634 }
635
636 /*
637 * allocating an SA entry for an *OUTBOUND* packet.
638 * checking each request entries in SP, and acquire an SA if need.
639 * OUT: 0: there are valid requests.
640 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
641 */
642 int
643 key_checkrequest(struct ipsecrequest *isr, struct secasindex *saidx)
644 {
645 u_int level;
646 int error;
647
648 /* sanity check */
649 if (isr == NULL || saidx == NULL)
650 panic("key_checkrequest: NULL pointer is passed.\n");
651
652 /* check mode */
653 switch (saidx->mode) {
654 case IPSEC_MODE_TRANSPORT:
655 case IPSEC_MODE_TUNNEL:
656 break;
657 case IPSEC_MODE_ANY:
658 default:
659 panic("key_checkrequest: Invalid policy defined.\n");
660 }
661
662 /* get current level */
663 level = ipsec_get_reqlevel(isr);
664
665 #if 0
666 /*
667 * We do allocate new SA only if the state of SA in the holder is
668 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
669 */
670 if (isr->sav != NULL) {
671 if (isr->sav->sah == NULL)
672 panic("key_checkrequest: sah is null.\n");
673 if (isr->sav == (struct secasvar *)LIST_FIRST(
674 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
675 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
676 kprintf("DP checkrequest calls free SA:%p\n",
677 isr->sav));
678 key_freesav(isr->sav);
679 isr->sav = NULL;
680 }
681 }
682 #else
683 /*
684 * we free any SA stashed in the IPsec request because a different
685 * SA may be involved each time this request is checked, either
686 * because new SAs are being configured, or this request is
687 * associated with an unconnected datagram socket, or this request
688 * is associated with a system default policy.
689 *
690 * The operation may have negative impact to performance. We may
691 * want to check cached SA carefully, rather than picking new SA
692 * every time.
693 */
694 if (isr->sav != NULL) {
695 key_freesav(isr->sav);
696 isr->sav = NULL;
697 }
698 #endif
699
700 /*
701 * new SA allocation if no SA found.
702 * key_allocsa_policy should allocate the oldest SA available.
703 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
704 */
705 if (isr->sav == NULL)
706 isr->sav = key_allocsa_policy(saidx);
707
708 /* When there is SA. */
709 if (isr->sav != NULL)
710 return 0;
711
712 /* there is no SA */
713 if ((error = key_acquire(saidx, isr->sp)) != 0) {
714 /* XXX What should I do ? */
715 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
716 "from key_acquire.\n", error));
717 return error;
718 }
719
720 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
721 }
722
723 /*
724 * allocating a SA for policy entry from SAD.
725 * NOTE: searching SAD of aliving state.
726 * OUT: NULL: not found.
727 * others: found and return the pointer.
728 */
729 static struct secasvar *
730 key_allocsa_policy(struct secasindex *saidx)
731 {
732 struct secashead *sah;
733 struct secasvar *sav;
734 u_int stateidx, state;
735 const u_int *saorder_state_valid;
736 int arraysize;
737
738 LIST_FOREACH(sah, &sahtree, chain) {
739 if (sah->state == SADB_SASTATE_DEAD)
740 continue;
741 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
742 goto found;
743 }
744
745 return NULL;
746
747 found:
748
749 /*
750 * search a valid state list for outbound packet.
751 * This search order is important.
752 */
753 if (key_preferred_oldsa) {
754 saorder_state_valid = saorder_state_valid_prefer_old;
755 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
756 } else {
757 saorder_state_valid = saorder_state_valid_prefer_new;
758 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
759 }
760
761 for (stateidx = 0; stateidx < arraysize; stateidx++) {
762
763 state = saorder_state_valid[stateidx];
764
765 sav = key_do_allocsa_policy(sah, state);
766 if (sav != NULL)
767 return sav;
768 }
769
770 return NULL;
771 }
772
773 /*
774 * searching SAD with direction, protocol, mode and state.
775 * called by key_allocsa_policy().
776 * OUT:
777 * NULL : not found
778 * others : found, pointer to a SA.
779 */
780 static struct secasvar *
781 key_do_allocsa_policy(struct secashead *sah, u_int state)
782 {
783 struct secasvar *sav, *nextsav, *candidate, *d;
784
785 /* initilize */
786 candidate = NULL;
787
788 for (sav = LIST_FIRST(&sah->savtree[state]);
789 sav != NULL;
790 sav = nextsav) {
791
792 nextsav = LIST_NEXT(sav, chain);
793
794 /* sanity check */
795 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
796
797 /* initialize */
798 if (candidate == NULL) {
799 candidate = sav;
800 continue;
801 }
802
803 /* Which SA is the better ? */
804
805 /* sanity check 2 */
806 if (candidate->lft_c == NULL || sav->lft_c == NULL)
807 panic("key_do_allocsa_policy: "
808 "lifetime_current is NULL.\n");
809
810 /* What the best method is to compare ? */
811 if (key_preferred_oldsa) {
812 if (candidate->lft_c->sadb_lifetime_addtime >
813 sav->lft_c->sadb_lifetime_addtime) {
814 candidate = sav;
815 }
816 continue;
817 /*NOTREACHED*/
818 }
819
820 /* prefered new sa rather than old sa */
821 if (candidate->lft_c->sadb_lifetime_addtime <
822 sav->lft_c->sadb_lifetime_addtime) {
823 d = candidate;
824 candidate = sav;
825 } else
826 d = sav;
827
828 /*
829 * prepared to delete the SA when there is more
830 * suitable candidate and the lifetime of the SA is not
831 * permanent.
832 */
833 if (d->lft_c->sadb_lifetime_addtime != 0) {
834 struct mbuf *m, *result;
835
836 key_sa_chgstate(d, SADB_SASTATE_DEAD);
837
838 m = key_setsadbmsg(SADB_DELETE, 0,
839 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
840 if (!m)
841 goto msgfail;
842 result = m;
843
844 /* set sadb_address for saidx's. */
845 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
846 (struct sockaddr *)&d->sah->saidx.src,
847 d->sah->saidx.src.ss_len << 3,
848 IPSEC_ULPROTO_ANY);
849 if (!m)
850 goto msgfail;
851 m_cat(result, m);
852
853 /* set sadb_address for saidx's. */
854 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
855 (struct sockaddr *)&d->sah->saidx.src,
856 d->sah->saidx.src.ss_len << 3,
857 IPSEC_ULPROTO_ANY);
858 if (!m)
859 goto msgfail;
860 m_cat(result, m);
861
862 /* create SA extension */
863 m = key_setsadbsa(d);
864 if (!m)
865 goto msgfail;
866 m_cat(result, m);
867
868 if (result->m_len < sizeof(struct sadb_msg)) {
869 result = m_pullup(result,
870 sizeof(struct sadb_msg));
871 if (result == NULL)
872 goto msgfail;
873 }
874
875 result->m_pkthdr.len = 0;
876 for (m = result; m; m = m->m_next)
877 result->m_pkthdr.len += m->m_len;
878 mtod(result, struct sadb_msg *)->sadb_msg_len =
879 PFKEY_UNIT64(result->m_pkthdr.len);
880
881 if (key_sendup_mbuf(NULL, result,
882 KEY_SENDUP_REGISTERED))
883 goto msgfail;
884 msgfail:
885 key_freesav(d);
886 }
887 }
888
889 if (candidate) {
890 candidate->refcnt++;
891 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
892 kprintf("DP allocsa_policy cause "
893 "refcnt++:%d SA:%p\n",
894 candidate->refcnt, candidate));
895 }
896 return candidate;
897 }
898
899 /*
900 * allocating a SA entry for a *INBOUND* packet.
901 * Must call key_freesav() later.
902 * OUT: positive: pointer to a sav.
903 * NULL: not found, or error occured.
904 *
905 * In the comparison, source address will be ignored for RFC2401 conformance.
906 * To quote, from section 4.1:
907 * A security association is uniquely identified by a triple consisting
908 * of a Security Parameter Index (SPI), an IP Destination Address, and a
909 * security protocol (AH or ESP) identifier.
910 * Note that, however, we do need to keep source address in IPsec SA.
911 * IKE specification and PF_KEY specification do assume that we
912 * keep source address in IPsec SA. We see a tricky situation here.
913 */
914 struct secasvar *
915 key_allocsa(u_int family, caddr_t src, caddr_t dst, u_int proto,
916 u_int32_t spi)
917 {
918 struct secashead *sah;
919 struct secasvar *sav;
920 u_int stateidx, state;
921 struct sockaddr_in sin;
922 struct sockaddr_in6 sin6;
923 const u_int *saorder_state_valid;
924 int arraysize;
925
926 /* sanity check */
927 if (src == NULL || dst == NULL)
928 panic("key_allocsa: NULL pointer is passed.\n");
929
930 /*
931 * when both systems employ similar strategy to use a SA.
932 * the search order is important even in the inbound case.
933 */
934 if (key_preferred_oldsa) {
935 saorder_state_valid = saorder_state_valid_prefer_old;
936 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
937 } else {
938 saorder_state_valid = saorder_state_valid_prefer_new;
939 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
940 }
941
942 /*
943 * searching SAD.
944 * XXX: to be checked internal IP header somewhere. Also when
945 * IPsec tunnel packet is received. But ESP tunnel mode is
946 * encrypted so we can't check internal IP header.
947 */
948 crit_enter();
949 LIST_FOREACH(sah, &sahtree, chain) {
950 /*
951 * search a valid state list for inbound packet.
952 * the search order is not important.
953 */
954 for (stateidx = 0; stateidx < arraysize; stateidx++) {
955 state = saorder_state_valid[stateidx];
956 LIST_FOREACH(sav, &sah->savtree[state], chain) {
957 /* sanity check */
958 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
959 if (proto != sav->sah->saidx.proto)
960 continue;
961 if (spi != sav->spi)
962 continue;
963 if (family != sav->sah->saidx.src.ss_family ||
964 family != sav->sah->saidx.dst.ss_family)
965 continue;
966
967 #if 0 /* don't check src */
968 /* check src address */
969 switch (family) {
970 case AF_INET:
971 bzero(&sin, sizeof(sin));
972 sin.sin_family = AF_INET;
973 sin.sin_len = sizeof(sin);
974 bcopy(src, &sin.sin_addr,
975 sizeof(sin.sin_addr));
976 if (key_sockaddrcmp((struct sockaddr*)&sin,
977 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
978 continue;
979
980 break;
981 case AF_INET6:
982 bzero(&sin6, sizeof(sin6));
983 sin6.sin6_family = AF_INET6;
984 sin6.sin6_len = sizeof(sin6);
985 bcopy(src, &sin6.sin6_addr,
986 sizeof(sin6.sin6_addr));
987 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
988 /* kame fake scopeid */
989 sin6.sin6_scope_id =
990 ntohs(sin6.sin6_addr.s6_addr16[1]);
991 sin6.sin6_addr.s6_addr16[1] = 0;
992 }
993 if (key_sockaddrcmp((struct sockaddr*)&sin6,
994 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
995 continue;
996 break;
997 default:
998 ipseclog((LOG_DEBUG, "key_allocsa: "
999 "unknown address family=%d.\n",
1000 family));
1001 continue;
1002 }
1003
1004 #endif
1005 /* check dst address */
1006 switch (family) {
1007 case AF_INET:
1008 bzero(&sin, sizeof(sin));
1009 sin.sin_family = AF_INET;
1010 sin.sin_len = sizeof(sin);
1011 bcopy(dst, &sin.sin_addr,
1012 sizeof(sin.sin_addr));
1013 if (key_sockaddrcmp((struct sockaddr*)&sin,
1014 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1015 continue;
1016
1017 break;
1018 case AF_INET6:
1019 bzero(&sin6, sizeof(sin6));
1020 sin6.sin6_family = AF_INET6;
1021 sin6.sin6_len = sizeof(sin6);
1022 bcopy(dst, &sin6.sin6_addr,
1023 sizeof(sin6.sin6_addr));
1024 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1025 /* kame fake scopeid */
1026 sin6.sin6_scope_id =
1027 ntohs(sin6.sin6_addr.s6_addr16[1]);
1028 sin6.sin6_addr.s6_addr16[1] = 0;
1029 }
1030 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1031 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1032 continue;
1033 break;
1034 default:
1035 ipseclog((LOG_DEBUG, "key_allocsa: "
1036 "unknown address family=%d.\n",
1037 family));
1038 continue;
1039 }
1040
1041 goto found;
1042 }
1043 }
1044 }
1045
1046 /* not found */
1047 crit_exit();
1048 return NULL;
1049
1050 found:
1051 sav->refcnt++;
1052 crit_exit();
1053 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1054 kprintf("DP allocsa cause refcnt++:%d SA:%p\n",
1055 sav->refcnt, sav));
1056 return sav;
1057 }
1058
1059 /*
1060 * Must be called after calling key_allocsp().
1061 * For both the packet without socket and key_freeso().
1062 */
1063 void
1064 key_freesp(struct secpolicy *sp)
1065 {
1066 /* sanity check */
1067 if (sp == NULL)
1068 panic("key_freesp: NULL pointer is passed.\n");
1069
1070 sp->refcnt--;
1071 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1072 kprintf("DP freesp cause refcnt--:%d SP:%p\n",
1073 sp->refcnt, sp));
1074
1075 if (sp->refcnt == 0)
1076 key_delsp(sp);
1077
1078 return;
1079 }
1080
1081 /*
1082 * Must be called after calling key_allocsp().
1083 * For the packet with socket.
1084 */
1085 void
1086 key_freeso(struct socket *so)
1087 {
1088 /* sanity check */
1089 if (so == NULL)
1090 panic("key_freeso: NULL pointer is passed.\n");
1091
1092 switch (so->so_proto->pr_domain->dom_family) {
1093 #ifdef INET
1094 case PF_INET:
1095 {
1096 struct inpcb *pcb = so->so_pcb;
1097
1098 /* Does it have a PCB ? */
1099 if (pcb == NULL)
1100 return;
1101 key_freesp_so(&pcb->inp_sp->sp_in);
1102 key_freesp_so(&pcb->inp_sp->sp_out);
1103 }
1104 break;
1105 #endif
1106 #ifdef INET6
1107 case PF_INET6:
1108 {
1109 #ifdef HAVE_NRL_INPCB
1110 struct inpcb *pcb = so->so_pcb;
1111
1112 /* Does it have a PCB ? */
1113 if (pcb == NULL)
1114 return;
1115 key_freesp_so(&pcb->inp_sp->sp_in);
1116 key_freesp_so(&pcb->inp_sp->sp_out);
1117 #else
1118 struct in6pcb *pcb = so->so_pcb;
1119
1120 /* Does it have a PCB ? */
1121 if (pcb == NULL)
1122 return;
1123 key_freesp_so(&pcb->in6p_sp->sp_in);
1124 key_freesp_so(&pcb->in6p_sp->sp_out);
1125 #endif
1126 }
1127 break;
1128 #endif /* INET6 */
1129 default:
1130 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1131 so->so_proto->pr_domain->dom_family));
1132 return;
1133 }
1134
1135 return;
1136 }
1137
1138 static void
1139 key_freesp_so(struct secpolicy **sp)
1140 {
1141 /* sanity check */
1142 if (sp == NULL || *sp == NULL)
1143 panic("key_freesp_so: sp == NULL\n");
1144
1145 switch ((*sp)->policy) {
1146 case IPSEC_POLICY_IPSEC:
1147 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1148 kprintf("DP freeso calls free SP:%p\n", *sp));
1149 key_freesp(*sp);
1150 *sp = NULL;
1151 break;
1152 case IPSEC_POLICY_ENTRUST:
1153 case IPSEC_POLICY_BYPASS:
1154 return;
1155 default:
1156 panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
1157 }
1158
1159 return;
1160 }
1161
1162 /*
1163 * Must be called after calling key_allocsa().
1164 * This function is called by key_freesp() to free some SA allocated
1165 * for a policy.
1166 */
1167 void
1168 key_freesav(struct secasvar *sav)
1169 {
1170 /* sanity check */
1171 if (sav == NULL)
1172 panic("key_freesav: NULL pointer is passed.\n");
1173
1174 sav->refcnt--;
1175 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1176 kprintf("DP freesav cause refcnt--:%d SA:%p SPI %u\n",
1177 sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
1178
1179 if (sav->refcnt == 0)
1180 key_delsav(sav);
1181
1182 return;
1183 }
1184
1185 /* %%% SPD management */
1186 /*
1187 * free security policy entry.
1188 */
1189 static void
1190 key_delsp(struct secpolicy *sp)
1191 {
1192 /* sanity check */
1193 if (sp == NULL)
1194 panic("key_delsp: NULL pointer is passed.\n");
1195
1196 sp->state = IPSEC_SPSTATE_DEAD;
1197
1198 if (sp->refcnt > 0)
1199 return; /* can't free */
1200
1201 crit_enter();
1202 /* remove from SP index */
1203 if (__LIST_CHAINED(sp))
1204 LIST_REMOVE(sp, chain);
1205
1206 {
1207 struct ipsecrequest *isr = sp->req, *nextisr;
1208
1209 while (isr != NULL) {
1210 if (isr->sav != NULL) {
1211 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1212 kprintf("DP delsp calls free SA:%p\n",
1213 isr->sav));
1214 key_freesav(isr->sav);
1215 isr->sav = NULL;
1216 }
1217
1218 nextisr = isr->next;
1219 KFREE(isr);
1220 isr = nextisr;
1221 }
1222 }
1223
1224 keydb_delsecpolicy(sp);
1225
1226 crit_exit();
1227
1228 return;
1229 }
1230
1231 /*
1232 * search SPD
1233 * OUT: NULL : not found
1234 * others : found, pointer to a SP.
1235 */
1236 static struct secpolicy *
1237 key_getsp(struct secpolicyindex *spidx)
1238 {
1239 struct secpolicy *sp;
1240
1241 /* sanity check */
1242 if (spidx == NULL)
1243 panic("key_getsp: NULL pointer is passed.\n");
1244
1245 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1246 if (sp->state == IPSEC_SPSTATE_DEAD)
1247 continue;
1248 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1249 sp->refcnt++;
1250 return sp;
1251 }
1252 }
1253
1254 return NULL;
1255 }
1256
1257 /*
1258 * get SP by index.
1259 * OUT: NULL : not found
1260 * others : found, pointer to a SP.
1261 */
1262 static struct secpolicy *
1263 key_getspbyid(u_int32_t id)
1264 {
1265 struct secpolicy *sp;
1266
1267 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1268 if (sp->state == IPSEC_SPSTATE_DEAD)
1269 continue;
1270 if (sp->id == id) {
1271 sp->refcnt++;
1272 return sp;
1273 }
1274 }
1275
1276 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1277 if (sp->state == IPSEC_SPSTATE_DEAD)
1278 continue;
1279 if (sp->id == id) {
1280 sp->refcnt++;
1281 return sp;
1282 }
1283 }
1284
1285 return NULL;
1286 }
1287
1288 struct secpolicy *
1289 key_newsp(void)
1290 {
1291 struct secpolicy *newsp = NULL;
1292
1293 newsp = keydb_newsecpolicy();
1294 if (!newsp)
1295 return newsp;
1296
1297 newsp->refcnt = 1;
1298 newsp->req = NULL;
1299
1300 return newsp;
1301 }
1302
1303 /*
1304 * create secpolicy structure from sadb_x_policy structure.
1305 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1306 * so must be set properly later.
1307 */
1308 struct secpolicy *
1309 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1310 {
1311 struct secpolicy *newsp;
1312
1313 /* sanity check */
1314 if (xpl0 == NULL)
1315 panic("key_msg2sp: NULL pointer was passed.\n");
1316 if (len < sizeof(*xpl0))
1317 panic("key_msg2sp: invalid length.\n");
1318 if (len != PFKEY_EXTLEN(xpl0)) {
1319 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1320 *error = EINVAL;
1321 return NULL;
1322 }
1323
1324 if ((newsp = key_newsp()) == NULL) {
1325 *error = ENOBUFS;
1326 return NULL;
1327 }
1328
1329 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1330 newsp->policy = xpl0->sadb_x_policy_type;
1331
1332 /* check policy */
1333 switch (xpl0->sadb_x_policy_type) {
1334 case IPSEC_POLICY_DISCARD:
1335 case IPSEC_POLICY_NONE:
1336 case IPSEC_POLICY_ENTRUST:
1337 case IPSEC_POLICY_BYPASS:
1338 newsp->req = NULL;
1339 break;
1340
1341 case IPSEC_POLICY_IPSEC:
1342 {
1343 int tlen;
1344 struct sadb_x_ipsecrequest *xisr;
1345 struct ipsecrequest **p_isr = &newsp->req;
1346
1347 /* validity check */
1348 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1349 ipseclog((LOG_DEBUG,
1350 "key_msg2sp: Invalid msg length.\n"));
1351 key_freesp(newsp);
1352 *error = EINVAL;
1353 return NULL;
1354 }
1355
1356 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1357 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1358
1359 while (tlen > 0) {
1360
1361 /* length check */
1362 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1363 ipseclog((LOG_DEBUG, "key_msg2sp: "
1364 "invalid ipsecrequest length.\n"));
1365 key_freesp(newsp);
1366 *error = EINVAL;
1367 return NULL;
1368 }
1369
1370 /* allocate request buffer */
1371 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1372 if ((*p_isr) == NULL) {
1373 ipseclog((LOG_DEBUG,
1374 "key_msg2sp: No more memory.\n"));
1375 key_freesp(newsp);
1376 *error = ENOBUFS;
1377 return NULL;
1378 }
1379 bzero(*p_isr, sizeof(**p_isr));
1380
1381 /* set values */
1382 (*p_isr)->next = NULL;
1383
1384 switch (xisr->sadb_x_ipsecrequest_proto) {
1385 case IPPROTO_ESP:
1386 case IPPROTO_AH:
1387 case IPPROTO_IPCOMP:
1388 break;
1389 default:
1390 ipseclog((LOG_DEBUG,
1391 "key_msg2sp: invalid proto type=%u\n",
1392 xisr->sadb_x_ipsecrequest_proto));
1393 key_freesp(newsp);
1394 *error = EPROTONOSUPPORT;
1395 return NULL;
1396 }
1397 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1398
1399 switch (xisr->sadb_x_ipsecrequest_mode) {
1400 case IPSEC_MODE_TRANSPORT:
1401 case IPSEC_MODE_TUNNEL:
1402 break;
1403 case IPSEC_MODE_ANY:
1404 default:
1405 ipseclog((LOG_DEBUG,
1406 "key_msg2sp: invalid mode=%u\n",
1407 xisr->sadb_x_ipsecrequest_mode));
1408 key_freesp(newsp);
1409 *error = EINVAL;
1410 return NULL;
1411 }
1412 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1413
1414 switch (xisr->sadb_x_ipsecrequest_level) {
1415 case IPSEC_LEVEL_DEFAULT:
1416 case IPSEC_LEVEL_USE:
1417 case IPSEC_LEVEL_REQUIRE:
1418 break;
1419 case IPSEC_LEVEL_UNIQUE:
1420 /* validity check */
1421 /*
1422 * If range violation of reqid, kernel will
1423 * update it, don't refuse it.
1424 */
1425 if (xisr->sadb_x_ipsecrequest_reqid
1426 > IPSEC_MANUAL_REQID_MAX) {
1427 ipseclog((LOG_DEBUG,
1428 "key_msg2sp: reqid=%d range "
1429 "violation, updated by kernel.\n",
1430 xisr->sadb_x_ipsecrequest_reqid));
1431 xisr->sadb_x_ipsecrequest_reqid = 0;
1432 }
1433
1434 /* allocate new reqid id if reqid is zero. */
1435 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1436 u_int32_t reqid;
1437 if ((reqid = key_newreqid()) == 0) {
1438 key_freesp(newsp);
1439 *error = ENOBUFS;
1440 return NULL;
1441 }
1442 (*p_isr)->saidx.reqid = reqid;
1443 xisr->sadb_x_ipsecrequest_reqid = reqid;
1444 } else {
1445 /* set it for manual keying. */
1446 (*p_isr)->saidx.reqid =
1447 xisr->sadb_x_ipsecrequest_reqid;
1448 }
1449 break;
1450
1451 default:
1452 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1453 xisr->sadb_x_ipsecrequest_level));
1454 key_freesp(newsp);
1455 *error = EINVAL;
1456 return NULL;
1457 }
1458 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1459
1460 /* set IP addresses if there */
1461 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1462 struct sockaddr *paddr;
1463
1464 paddr = (struct sockaddr *)(xisr + 1);
1465
1466 /* validity check */
1467 if (paddr->sa_len
1468 > sizeof((*p_isr)->saidx.src)) {
1469 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1470 "address length.\n"));
1471 key_freesp(newsp);
1472 *error = EINVAL;
1473 return NULL;
1474 }
1475 bcopy(paddr, &(*p_isr)->saidx.src,
1476 paddr->sa_len);
1477
1478 paddr = (struct sockaddr *)((caddr_t)paddr
1479 + paddr->sa_len);
1480
1481 /* validity check */
1482 if (paddr->sa_len
1483 > sizeof((*p_isr)->saidx.dst)) {
1484 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1485 "address length.\n"));
1486 key_freesp(newsp);
1487 *error = EINVAL;
1488 return NULL;
1489 }
1490 bcopy(paddr, &(*p_isr)->saidx.dst,
1491 paddr->sa_len);
1492 }
1493
1494 (*p_isr)->sav = NULL;
1495 (*p_isr)->sp = newsp;
1496
1497 /* initialization for the next. */
1498 p_isr = &(*p_isr)->next;
1499 tlen -= xisr->sadb_x_ipsecrequest_len;
1500
1501 /* validity check */
1502 if (tlen < 0) {
1503 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1504 key_freesp(newsp);
1505 *error = EINVAL;
1506 return NULL;
1507 }
1508
1509 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1510 + xisr->sadb_x_ipsecrequest_len);
1511 }
1512 }
1513 break;
1514 default:
1515 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1516 key_freesp(newsp);
1517 *error = EINVAL;
1518 return NULL;
1519 }
1520
1521 *error = 0;
1522 return newsp;
1523 }
1524
1525 static u_int32_t
1526 key_newreqid(void)
1527 {
1528 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1529
1530 auto_reqid = (auto_reqid == ~0
1531 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1532
1533 /* XXX should be unique check */
1534
1535 return auto_reqid;
1536 }
1537
1538 /*
1539 * copy secpolicy struct to sadb_x_policy structure indicated.
1540 */
1541 struct mbuf *
1542 key_sp2msg(struct secpolicy *sp)
1543 {
1544 struct sadb_x_policy *xpl;
1545 int tlen;
1546 caddr_t p;
1547 struct mbuf *m;
1548
1549 /* sanity check. */
1550 if (sp == NULL)
1551 panic("key_sp2msg: NULL pointer was passed.\n");
1552
1553 tlen = key_getspreqmsglen(sp);
1554
1555 m = key_alloc_mbuf(tlen);
1556 if (!m || m->m_next) { /*XXX*/
1557 if (m)
1558 m_freem(m);
1559 return NULL;
1560 }
1561
1562 m->m_len = tlen;
1563 m->m_next = NULL;
1564 xpl = mtod(m, struct sadb_x_policy *);
1565 bzero(xpl, tlen);
1566
1567 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1568 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1569 xpl->sadb_x_policy_type = sp->policy;
1570 xpl->sadb_x_policy_dir = sp->spidx.dir;
1571 xpl->sadb_x_policy_id = sp->id;
1572 p = (caddr_t)xpl + sizeof(*xpl);
1573
1574 /* if is the policy for ipsec ? */
1575 if (sp->policy == IPSEC_POLICY_IPSEC) {
1576 struct sadb_x_ipsecrequest *xisr;
1577 struct ipsecrequest *isr;
1578
1579 for (isr = sp->req; isr != NULL; isr = isr->next) {
1580
1581 xisr = (struct sadb_x_ipsecrequest *)p;
1582
1583 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1584 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1585 xisr->sadb_x_ipsecrequest_level = isr->level;
1586 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1587
1588 p += sizeof(*xisr);
1589 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
1590 p += isr->saidx.src.ss_len;
1591 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
1592 p += isr->saidx.src.ss_len;
1593
1594 xisr->sadb_x_ipsecrequest_len =
1595 PFKEY_ALIGN8(sizeof(*xisr)
1596 + isr->saidx.src.ss_len
1597 + isr->saidx.dst.ss_len);
1598 }
1599 }
1600
1601 return m;
1602 }
1603
1604 /* m will not be freed nor modified */
1605 static struct mbuf *
1606 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1607 int ndeep, int nitem, ...)
1608 {
1609 __va_list ap;
1610 int idx;
1611 int i;
1612 struct mbuf *result = NULL, *n;
1613 int len;
1614
1615 if (m == NULL || mhp == NULL)
1616 panic("null pointer passed to key_gather");
1617
1618 __va_start(ap, nitem);
1619 for (i = 0; i < nitem; i++) {
1620 idx = __va_arg(ap, int);
1621 if (idx < 0 || idx > SADB_EXT_MAX)
1622 goto fail;
1623 /* don't attempt to pull empty extension */
1624 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1625 continue;
1626 if (idx != SADB_EXT_RESERVED &&
1627 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1628 continue;
1629
1630 if (idx == SADB_EXT_RESERVED) {
1631 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1632 #ifdef DIAGNOSTIC
1633 if (len > MHLEN)
1634 panic("assumption failed");
1635 #endif
1636 MGETHDR(n, MB_DONTWAIT, MT_DATA);
1637 if (!n)
1638 goto fail;
1639 n->m_len = len;
1640 n->m_next = NULL;
1641 m_copydata(m, 0, sizeof(struct sadb_msg),
1642 mtod(n, caddr_t));
1643 } else if (i < ndeep) {
1644 len = mhp->extlen[idx];
1645 n = key_alloc_mbuf(len);
1646 if (!n || n->m_next) { /*XXX*/
1647 if (n)
1648 m_freem(n);
1649 goto fail;
1650 }
1651 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1652 mtod(n, caddr_t));
1653 } else {
1654 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1655 MB_DONTWAIT);
1656 }
1657 if (n == NULL)
1658 goto fail;
1659
1660 if (result)
1661 m_cat(result, n);
1662 else
1663 result = n;
1664 }
1665 __va_end(ap);
1666
1667 if ((result->m_flags & M_PKTHDR) != 0) {
1668 result->m_pkthdr.len = 0;
1669 for (n = result; n; n = n->m_next)
1670 result->m_pkthdr.len += n->m_len;
1671 }
1672
1673 return result;
1674
1675 fail:
1676 m_freem(result);
1677 return NULL;
1678 }
1679
1680 /*
1681 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1682 * add a entry to SP database, when received
1683 * <base, address(SD), (lifetime(H),) policy>
1684 * from the user(?).
1685 * Adding to SP database,
1686 * and send
1687 * <base, address(SD), (lifetime(H),) policy>
1688 * to the socket which was send.
1689 *
1690 * SPDADD set a unique policy entry.
1691 * SPDSETIDX like SPDADD without a part of policy requests.
1692 * SPDUPDATE replace a unique policy entry.
1693 *
1694 * m will always be freed.
1695 */
1696 static int
1697 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1698 {
1699 struct sadb_address *src0, *dst0;
1700 struct sadb_x_policy *xpl0, *xpl;
1701 struct sadb_lifetime *lft = NULL;
1702 struct secpolicyindex spidx;
1703 struct secpolicy *newsp;
1704 struct timeval tv;
1705 int error;
1706
1707 /* sanity check */
1708 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1709 panic("key_spdadd: NULL pointer is passed.\n");
1710
1711 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1712 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1713 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1714 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1715 return key_senderror(so, m, EINVAL);
1716 }
1717 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1718 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1719 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1720 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1721 return key_senderror(so, m, EINVAL);
1722 }
1723 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1724 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1725 < sizeof(struct sadb_lifetime)) {
1726 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1727 return key_senderror(so, m, EINVAL);
1728 }
1729 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1730 }
1731
1732 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1733 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1734 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1735
1736 /* make secindex */
1737 /* XXX boundary check against sa_len */
1738 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1739 src0 + 1,
1740 dst0 + 1,
1741 src0->sadb_address_prefixlen,
1742 dst0->sadb_address_prefixlen,
1743 src0->sadb_address_proto,
1744 &spidx);
1745
1746 /* checking the direciton. */
1747 switch (xpl0->sadb_x_policy_dir) {
1748 case IPSEC_DIR_INBOUND:
1749 case IPSEC_DIR_OUTBOUND:
1750 break;
1751 default:
1752 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1753 mhp->msg->sadb_msg_errno = EINVAL;
1754 return 0;
1755 }
1756
1757 /* check policy */
1758 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1759 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1760 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1761 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1762 return key_senderror(so, m, EINVAL);
1763 }
1764
1765 /* policy requests are mandatory when action is ipsec. */
1766 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1767 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1768 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1769 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1770 return key_senderror(so, m, EINVAL);
1771 }
1772
1773 /*
1774 * checking there is SP already or not.
1775 * SPDUPDATE doesn't depend on whether there is a SP or not.
1776 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1777 * then error.
1778 */
1779 newsp = key_getsp(&spidx);
1780 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1781 if (newsp) {
1782 newsp->state = IPSEC_SPSTATE_DEAD;
1783 key_freesp(newsp);
1784 }
1785 } else {
1786 if (newsp != NULL) {
1787 key_freesp(newsp);
1788 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1789 return key_senderror(so, m, EEXIST);
1790 }
1791 }
1792
1793 /* allocation new SP entry */
1794 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1795 return key_senderror(so, m, error);
1796 }
1797
1798 if ((newsp->id = key_getnewspid()) == 0) {
1799 keydb_delsecpolicy(newsp);
1800 return key_senderror(so, m, ENOBUFS);
1801 }
1802
1803 /* XXX boundary check against sa_len */
1804 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1805 src0 + 1,
1806 dst0 + 1,
1807 src0->sadb_address_prefixlen,
1808 dst0->sadb_address_prefixlen,
1809 src0->sadb_address_proto,
1810 &newsp->spidx);
1811
1812 /* sanity check on addr pair */
1813 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1814 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1815 keydb_delsecpolicy(newsp);
1816 return key_senderror(so, m, EINVAL);
1817 }
1818 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1819 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1820 keydb_delsecpolicy(newsp);
1821 return key_senderror(so, m, EINVAL);
1822 }
1823 #if 1
1824 if (newsp->req && newsp->req->saidx.src.ss_family) {
1825 struct sockaddr *sa;
1826 sa = (struct sockaddr *)(src0 + 1);
1827 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
1828 keydb_delsecpolicy(newsp);
1829 return key_senderror(so, m, EINVAL);
1830 }
1831 }
1832 if (newsp->req && newsp->req->saidx.dst.ss_family) {
1833 struct sockaddr *sa;
1834 sa = (struct sockaddr *)(dst0 + 1);
1835 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
1836 keydb_delsecpolicy(newsp);
1837 return key_senderror(so, m, EINVAL);
1838 }
1839 }
1840 #endif
1841
1842 microtime(&tv);
1843 newsp->created = tv.tv_sec;
1844 newsp->lastused = tv.tv_sec;
1845 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1846 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1847
1848 newsp->refcnt = 1; /* do not reclaim until I say I do */
1849 newsp->state = IPSEC_SPSTATE_ALIVE;
1850 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1851
1852 /* delete the entry in spacqtree */
1853 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1854 struct secspacq *spacq;
1855 if ((spacq = key_getspacq(&spidx)) != NULL) {
1856 /* reset counter in order to deletion by timehandler. */
1857 microtime(&tv);
1858 spacq->created = tv.tv_sec;
1859 spacq->count = 0;
1860 }
1861 }
1862
1863 {
1864 struct mbuf *n, *mpolicy;
1865 struct sadb_msg *newmsg;
1866 int off;
1867
1868 /* create new sadb_msg to reply. */
1869 if (lft) {
1870 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1871 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1872 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1873 } else {
1874 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1875 SADB_X_EXT_POLICY,
1876 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1877 }
1878 if (!n)
1879 return key_senderror(so, m, ENOBUFS);
1880
1881 if (n->m_len < sizeof(*newmsg)) {
1882 n = m_pullup(n, sizeof(*newmsg));
1883 if (!n)
1884 return key_senderror(so, m, ENOBUFS);
1885 }
1886 newmsg = mtod(n, struct sadb_msg *);
1887 newmsg->sadb_msg_errno = 0;
1888 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1889
1890 off = 0;
1891 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1892 sizeof(*xpl), &off);
1893 if (mpolicy == NULL) {
1894 /* n is already freed */
1895 return key_senderror(so, m, ENOBUFS);
1896 }
1897 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1898 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1899 m_freem(n);
1900 return key_senderror(so, m, EINVAL);
1901 }
1902 xpl->sadb_x_policy_id = newsp->id;
1903
1904 m_freem(m);
1905 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1906 }
1907 }
1908
1909 /*
1910 * get new policy id.
1911 * OUT:
1912 * 0: failure.
1913 * others: success.
1914 */
1915 static u_int32_t
1916 key_getnewspid(void)
1917 {
1918 u_int32_t newid = 0;
1919 int count = key_spi_trycnt; /* XXX */
1920 struct secpolicy *sp;
1921
1922 /* when requesting to allocate spi ranged */
1923 while (count--) {
1924 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1925
1926 if ((sp = key_getspbyid(newid)) == NULL)
1927 break;
1928
1929 key_freesp(sp);
1930 }
1931
1932 if (count == 0 || newid == 0) {
1933 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1934 return 0;
1935 }
1936
1937 return newid;
1938 }
1939
1940 /*
1941 * SADB_SPDDELETE processing
1942 * receive
1943 * <base, address(SD), policy(*)>
1944 * from the user(?), and set SADB_SASTATE_DEAD,
1945 * and send,
1946 * <base, address(SD), policy(*)>
1947 * to the ikmpd.
1948 * policy(*) including direction of policy.
1949 *
1950 * m will always be freed.
1951 */
1952 static int
1953 key_spddelete(struct socket *so, struct mbuf *m,
1954 const struct sadb_msghdr *mhp)
1955 {
1956 struct sadb_address *src0, *dst0;
1957 struct sadb_x_policy *xpl0;
1958 struct secpolicyindex spidx;
1959 struct secpolicy *sp;
1960
1961 /* sanity check */
1962 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1963 panic("key_spddelete: NULL pointer is passed.\n");
1964
1965 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1966 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1967 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1968 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1969 return key_senderror(so, m, EINVAL);
1970 }
1971 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1972 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1973 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1974 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1975 return key_senderror(so, m, EINVAL);
1976 }
1977
1978 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1979 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1980 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1981
1982 /* make secindex */
1983 /* XXX boundary check against sa_len */
1984 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1985 src0 + 1,
1986 dst0 + 1,
1987 src0->sadb_address_prefixlen,
1988 dst0->sadb_address_prefixlen,
1989 src0->sadb_address_proto,
1990 &spidx);
1991
1992 /* checking the direciton. */
1993 switch (xpl0->sadb_x_policy_dir) {
1994 case IPSEC_DIR_INBOUND:
1995 case IPSEC_DIR_OUTBOUND:
1996 break;
1997 default:
1998 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
1999 return key_senderror(so, m, EINVAL);
2000 }
2001
2002 /* Is there SP in SPD ? */
2003 if ((sp = key_getsp(&spidx)) == NULL) {
2004 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2005 return key_senderror(so, m, EINVAL);
2006 }
2007
2008 /* save policy id to buffer to be returned. */
2009 xpl0->sadb_x_policy_id = sp->id;
2010
2011 sp->state = IPSEC_SPSTATE_DEAD;
2012 key_freesp(sp);
2013
2014 {
2015 struct mbuf *n;
2016 struct sadb_msg *newmsg;
2017
2018 /* create new sadb_msg to reply. */
2019 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2020 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2021 if (!n)
2022 return key_senderror(so, m, ENOBUFS);
2023
2024 newmsg = mtod(n, struct sadb_msg *);
2025 newmsg->sadb_msg_errno = 0;
2026 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2027
2028 m_freem(m);
2029 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2030 }
2031 }
2032
2033 /*
2034 * SADB_SPDDELETE2 processing
2035 * receive
2036 * <base, policy(*)>
2037 * from the user(?), and set SADB_SASTATE_DEAD,
2038 * and send,
2039 * <base, policy(*)>
2040 * to the ikmpd.
2041 * policy(*) including direction of policy.
2042 *
2043 * m will always be freed.
2044 */
2045 static int
2046 key_spddelete2(struct socket *so, struct mbuf *m,
2047 const struct sadb_msghdr *mhp)
2048 {
2049 u_int32_t id;
2050 struct secpolicy *sp;
2051
2052 /* sanity check */
2053 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2054 panic("key_spddelete2: NULL pointer is passed.\n");
2055
2056 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2057 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2058 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2059 key_senderror(so, m, EINVAL);
2060 return 0;
2061 }
2062
2063 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2064
2065 /* Is there SP in SPD ? */
2066 if ((sp = key_getspbyid(id)) == NULL) {
2067 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2068 key_senderror(so, m, EINVAL);
2069 }
2070
2071 sp->state = IPSEC_SPSTATE_DEAD;
2072 key_freesp(sp);
2073
2074 {
2075 struct mbuf *n, *nn;
2076 struct sadb_msg *newmsg;
2077 int off, len;
2078
2079 /* create new sadb_msg to reply. */
2080 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2081
2082 if (len > MCLBYTES)
2083 return key_senderror(so, m, ENOBUFS);
2084 MGETHDR(n, MB_DONTWAIT, MT_DATA);
2085 if (n && len > MHLEN) {
2086 MCLGET(n, MB_DONTWAIT);
2087 if ((n->m_flags & M_EXT) == 0) {
2088 m_freem(n);
2089 n = NULL;
2090 }
2091 }
2092 if (!n)
2093 return key_senderror(so, m, ENOBUFS);
2094
2095 n->m_len = len;
2096 n->m_next = NULL;
2097 off = 0;
2098
2099 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2100 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2101
2102 #ifdef DIAGNOSTIC
2103 if (off != len)
2104 panic("length inconsistency in key_spddelete2");
2105 #endif
2106
2107 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2108 mhp->extlen[SADB_X_EXT_POLICY], MB_DONTWAIT);
2109 if (!n->m_next) {
2110 m_freem(n);
2111 return key_senderror(so, m, ENOBUFS);
2112 }
2113
2114 n->m_pkthdr.len = 0;
2115 for (nn = n; nn; nn = nn->m_next)
2116 n->m_pkthdr.len += nn->m_len;
2117
2118 newmsg = mtod(n, struct sadb_msg *);
2119 newmsg->sadb_msg_errno = 0;
2120 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2121
2122 m_freem(m);
2123 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2124 }
2125 }
2126
2127 /*
2128 * SADB_X_GET processing
2129 * receive
2130 * <base, policy(*)>
2131 * from the user(?),
2132 * and send,
2133 * <base, address(SD), policy>
2134 * to the ikmpd.
2135 * policy(*) including direction of policy.
2136 *
2137 * m will always be freed.
2138 */
2139 static int
2140 key_spdget(struct socket *so, struct mbuf *m,
2141 const struct sadb_msghdr *mhp)
2142 {
2143 u_int32_t id;
2144 struct secpolicy *sp;
2145 struct mbuf *n;
2146
2147 /* sanity check */
2148 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2149 panic("key_spdget: NULL pointer is passed.\n");
2150
2151 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2152 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2153 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2154 return key_senderror(so, m, EINVAL);
2155 }
2156
2157 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2158
2159 /* Is there SP in SPD ? */
2160 if ((sp = key_getspbyid(id)) == NULL) {
2161 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2162 return key_senderror(so, m, ENOENT);
2163 }
2164
2165 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2166 if (n != NULL) {
2167 m_freem(m);
2168 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2169 } else
2170 return key_senderror(so, m, ENOBUFS);
2171 }
2172
2173 /*
2174 * SADB_X_SPDACQUIRE processing.
2175 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2176 * send
2177 * <base, policy(*)>
2178 * to KMD, and expect to receive
2179 * <base> with SADB_X_SPDACQUIRE if error occured,
2180 * or
2181 * <base, policy>
2182 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2183 * policy(*) is without policy requests.
2184 *
2185 * 0 : succeed
2186 * others: error number
2187 */
2188 int
2189 key_spdacquire(struct secpolicy *sp)
2190 {
2191 struct mbuf *result = NULL, *m;
2192 struct secspacq *newspacq;
2193 int error;
2194
2195 /* sanity check */
2196 if (sp == NULL)
2197 panic("key_spdacquire: NULL pointer is passed.\n");
2198 if (sp->req != NULL)
2199 panic("key_spdacquire: called but there is request.\n");
2200 if (sp->policy != IPSEC_POLICY_IPSEC)
2201 panic("key_spdacquire: policy mismatched. IPsec is expected.\n");
2202
2203 /* get a entry to check whether sent message or not. */
2204 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2205 if (key_blockacq_count < newspacq->count) {
2206 /* reset counter and do send message. */
2207 newspacq->count = 0;
2208 } else {
2209 /* increment counter and do nothing. */
2210 newspacq->count++;
2211 return 0;
2212 }
2213 } else {
2214 /* make new entry for blocking to send SADB_ACQUIRE. */
2215 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2216 return ENOBUFS;
2217
2218 /* add to acqtree */
2219 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2220 }
2221
2222 /* create new sadb_msg to reply. */
2223 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2224 if (!m) {
2225 error = ENOBUFS;
2226 goto fail;
2227 }
2228 result = m;
2229
2230 result->m_pkthdr.len = 0;
2231 for (m = result; m; m = m->m_next)
2232 result->m_pkthdr.len += m->m_len;
2233
2234 mtod(result, struct sadb_msg *)->sadb_msg_len =
2235 PFKEY_UNIT64(result->m_pkthdr.len);
2236
2237 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2238
2239 fail:
2240 if (result)
2241 m_freem(result);
2242 return error;
2243 }
2244
2245 /*
2246 * SADB_SPDFLUSH processing
2247 * receive
2248 * <base>
2249 * from the user, and free all entries in secpctree.
2250 * and send,
2251 * <base>
2252 * to the user.
2253 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2254 *
2255 * m will always be freed.
2256 */
2257 static int
2258 key_spdflush(struct socket *so, struct mbuf *m,
2259 const struct sadb_msghdr *mhp)
2260 {
2261 struct sadb_msg *newmsg;
2262 struct secpolicy *sp;
2263 u_int dir;
2264
2265 /* sanity check */
2266 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2267 panic("key_spdflush: NULL pointer is passed.\n");
2268
2269 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2270 return key_senderror(so, m, EINVAL);
2271
2272 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2273 LIST_FOREACH(sp, &sptree[dir], chain) {
2274 sp->state = IPSEC_SPSTATE_DEAD;
2275 }
2276 }
2277
2278 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2279 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2280 return key_senderror(so, m, ENOBUFS);
2281 }
2282
2283 if (m->m_next)
2284 m_freem(m->m_next);
2285 m->m_next = NULL;
2286 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2287 newmsg = mtod(m, struct sadb_msg *);
2288 newmsg->sadb_msg_errno = 0;
2289 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2290
2291 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2292 }
2293
2294 /*
2295 * SADB_SPDDUMP processing
2296 * receive
2297 * <base>
2298 * from the user, and dump all SP leaves
2299 * and send,
2300 * <base> .....
2301 * to the ikmpd.
2302 *
2303 * m will always be freed.
2304 */
2305 static int
2306 key_spddump(struct socket *so, struct mbuf *m,
2307 const struct sadb_msghdr *mhp)
2308 {
2309 struct secpolicy *sp;
2310 int cnt;
2311 u_int dir;
2312 struct mbuf *n;
2313
2314 /* sanity check */
2315 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2316 panic("key_spddump: NULL pointer is passed.\n");
2317
2318 /* search SPD entry and get buffer size. */
2319 cnt = 0;
2320 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2321 LIST_FOREACH(sp, &sptree[dir], chain) {
2322 cnt++;
2323 }
2324 }
2325
2326 if (cnt == 0)
2327 return key_senderror(so, m, ENOENT);
2328
2329 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2330 LIST_FOREACH(sp, &sptree[dir], chain) {
2331 --cnt;
2332 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2333 mhp->msg->sadb_msg_pid);
2334
2335 if (n)
2336 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2337 }
2338 }
2339
2340 m_freem(m);
2341 return 0;
2342 }
2343
2344 static struct mbuf *
2345 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2346 u_int32_t pid)
2347 {
2348 struct mbuf *result = NULL, *m;
2349
2350 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2351 if (!m)
2352 goto fail;
2353 result = m;
2354
2355 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2356 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
2357 sp->spidx.ul_proto);
2358 if (!m)
2359 goto fail;
2360 m_cat(result, m);
2361
2362 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2363 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
2364 sp->spidx.ul_proto);
2365 if (!m)
2366 goto fail;
2367 m_cat(result, m);
2368
2369 m = key_sp2msg(sp);
2370 if (!m)
2371 goto fail;
2372 m_cat(result, m);
2373
2374 if ((result->m_flags & M_PKTHDR) == 0)
2375 goto fail;
2376
2377 if (result->m_len < sizeof(struct sadb_msg)) {
2378 result = m_pullup(result, sizeof(struct sadb_msg));
2379 if (result == NULL)
2380 goto fail;
2381 }
2382
2383 result->m_pkthdr.len = 0;
2384 for (m = result; m; m = m->m_next)
2385 result->m_pkthdr.len += m->m_len;
2386
2387 mtod(result, struct sadb_msg *)->sadb_msg_len =
2388 PFKEY_UNIT64(result->m_pkthdr.len);
2389
2390 return result;
2391
2392 fail:
2393 m_freem(result);
2394 return NULL;
2395 }
2396
2397 /*
2398 * get PFKEY message length for security policy and request.
2399 */
2400 static u_int
2401 key_getspreqmsglen(struct secpolicy *sp)
2402 {
2403 u_int tlen;
2404
2405 tlen = sizeof(struct sadb_x_policy);
2406
2407 /* if is the policy for ipsec ? */
2408 if (sp->policy != IPSEC_POLICY_IPSEC)
2409 return tlen;
2410
2411 /* get length of ipsec requests */
2412 {
2413 struct ipsecrequest *isr;
2414 int len;
2415
2416 for (isr = sp->req; isr != NULL; isr = isr->next) {
2417 len = sizeof(struct sadb_x_ipsecrequest)
2418 + isr->saidx.src.ss_len
2419 + isr->saidx.dst.ss_len;
2420
2421 tlen += PFKEY_ALIGN8(len);
2422 }
2423 }
2424
2425 return tlen;
2426 }
2427
2428 /*
2429 * SADB_SPDEXPIRE processing
2430 * send
2431 * <base, address(SD), lifetime(CH), policy>
2432 * to KMD by PF_KEY.
2433 *
2434 * OUT: 0 : succeed
2435 * others : error number
2436 */
2437 static int
2438 key_spdexpire(struct secpolicy *sp)
2439 {
2440 struct mbuf *result = NULL, *m;
2441 int len;
2442 int error = -1;
2443 struct sadb_lifetime *lt;
2444
2445 /* XXX: Why do we lock ? */
2446 crit_enter();
2447
2448 /* sanity check */
2449 if (sp == NULL)
2450 panic("key_spdexpire: NULL pointer is passed.\n");
2451
2452 /* set msg header */
2453 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2454 if (!m) {
2455 error = ENOBUFS;
2456 goto fail;
2457 }
2458 result = m;
2459
2460 /* create lifetime extension (current and hard) */
2461 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2462 m = key_alloc_mbuf(len);
2463 if (!m || m->m_next) { /*XXX*/
2464 if (m)
2465 m_freem(m);
2466 error = ENOBUFS;
2467 goto fail;
2468 }
2469 bzero(mtod(m, caddr_t), len);
2470 lt = mtod(m, struct sadb_lifetime *);
2471 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2472 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2473 lt->sadb_lifetime_allocations = 0;
2474 lt->sadb_lifetime_bytes = 0;
2475 lt->sadb_lifetime_addtime = sp->created;
2476 lt->sadb_lifetime_usetime = sp->lastused;
2477 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2478 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2479 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2480 lt->sadb_lifetime_allocations = 0;
2481 lt->sadb_lifetime_bytes = 0;
2482 lt->sadb_lifetime_addtime = sp->lifetime;
2483 lt->sadb_lifetime_usetime = sp->validtime;
2484 m_cat(result, m);
2485
2486 /* set sadb_address for source */
2487 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2488 (struct sockaddr *)&sp->spidx.src,
2489 sp->spidx.prefs, sp->spidx.ul_proto);
2490 if (!m) {
2491 error = ENOBUFS;
2492 goto fail;
2493 }
2494 m_cat(result, m);
2495
2496 /* set sadb_address for destination */
2497 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2498 (struct sockaddr *)&sp->spidx.dst,
2499 sp->spidx.prefd, sp->spidx.ul_proto);
2500 if (!m) {
2501 error = ENOBUFS;
2502 goto fail;
2503 }
2504 m_cat(result, m);
2505
2506 /* set secpolicy */
2507 m = key_sp2msg(sp);
2508 if (!m) {
2509 error = ENOBUFS;
2510 goto fail;
2511 }
2512 m_cat(result, m);
2513
2514 if ((result->m_flags & M_PKTHDR) == 0) {
2515 error = EINVAL;
2516 goto fail;
2517 }
2518
2519 if (result->m_len < sizeof(struct sadb_msg)) {
2520 result = m_pullup(result, sizeof(struct sadb_msg));
2521 if (result == NULL) {
2522 error = ENOBUFS;
2523 goto fail;
2524 }
2525 }
2526
2527 result->m_pkthdr.len = 0;
2528 for (m = result; m; m = m->m_next)
2529 result->m_pkthdr.len += m->m_len;
2530
2531 mtod(result, struct sadb_msg *)->sadb_msg_len =
2532 PFKEY_UNIT64(result->m_pkthdr.len);
2533
2534 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2535
2536 fail:
2537 if (result)
2538 m_freem(result);
2539 crit_exit();
2540 return error;
2541 }
2542
2543 /* %%% SAD management */
2544 /*
2545 * allocating a memory for new SA head, and copy from the values of mhp.
2546 * OUT: NULL : failure due to the lack of memory.
2547 * others : pointer to new SA head.
2548 */
2549 static struct secashead *
2550 key_newsah(struct secasindex *saidx)
2551 {
2552 struct secashead *newsah;
2553
2554 /* sanity check */
2555 if (saidx == NULL)
2556 panic("key_newsaidx: NULL pointer is passed.\n");
2557
2558 newsah = keydb_newsecashead();
2559 if (newsah == NULL)
2560 return NULL;
2561
2562 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2563
2564 /* add to saidxtree */
2565 newsah->state = SADB_SASTATE_MATURE;
2566 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2567
2568 return(newsah);
2569 }
2570
2571 /*
2572 * delete SA index and all SA registerd.
2573 */
2574 static void
2575 key_delsah(struct secashead *sah)
2576 {
2577 struct secasvar *sav, *nextsav;
2578 u_int stateidx, state;
2579 int zombie = 0;
2580
2581 /* sanity check */
2582 if (sah == NULL)
2583 panic("key_delsah: NULL pointer is passed.\n");
2584
2585 crit_enter();
2586
2587 /* searching all SA registerd in the secindex. */
2588 for (stateidx = 0;
2589 stateidx < _ARRAYLEN(saorder_state_any);
2590 stateidx++) {
2591
2592 state = saorder_state_any[stateidx];
2593 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2594 sav != NULL;
2595 sav = nextsav) {
2596
2597 nextsav = LIST_NEXT(sav, chain);
2598
2599 if (sav->refcnt > 0) {
2600 /* give up to delete this sa */
2601 zombie++;
2602 continue;
2603 }
2604
2605 /* sanity check */
2606 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2607
2608 key_freesav(sav);
2609
2610 /* remove back pointer */
2611 sav->sah = NULL;
2612 sav = NULL;
2613 }
2614 }
2615
2616 /* don't delete sah only if there are savs. */
2617 if (zombie) {
2618 crit_exit();
2619 return;
2620 }
2621
2622 if (sah->sa_route.ro_rt) {
2623 RTFREE(sah->sa_route.ro_rt);
2624 sah->sa_route.ro_rt = (struct rtentry *)NULL;
2625 }
2626
2627 /* remove from tree of SA index */
2628 if (__LIST_CHAINED(sah))
2629 LIST_REMOVE(sah, chain);
2630
2631 KFREE(sah);
2632
2633 crit_exit();
2634 return;
2635 }
2636
2637 /*
2638 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2639 * and copy the values of mhp into new buffer.
2640 * When SAD message type is GETSPI:
2641 * to set sequence number from acq_seq++,
2642 * to set zero to SPI.
2643 * not to call key_setsava().
2644 * OUT: NULL : fail
2645 * others : pointer to new secasvar.
2646 *
2647 * does not modify mbuf. does not free mbuf on error.
2648 */
2649 static struct secasvar *
2650 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2651 struct secashead *sah, int *errp)
2652 {
2653 struct secasvar *newsav;
2654 const struct sadb_sa *xsa;
2655
2656 /* sanity check */
2657 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2658 panic("key_newsa: NULL pointer is passed.\n");
2659
2660 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2661 if (newsav == NULL) {
2662 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2663 *errp = ENOBUFS;
2664 return NULL;
2665 }
2666 bzero((caddr_t)newsav, sizeof(struct secasvar));
2667
2668 switch (mhp->msg->sadb_msg_type) {
2669 case SADB_GETSPI:
2670 newsav->spi = 0;
2671
2672 #ifdef IPSEC_DOSEQCHECK
2673 /* sync sequence number */
2674 if (mhp->msg->sadb_msg_seq == 0)
2675 newsav->seq =
2676 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2677 else
2678 #endif
2679 newsav->seq = mhp->msg->sadb_msg_seq;
2680 break;
2681
2682 case SADB_ADD:
2683 /* sanity check */
2684 if (mhp->ext[SADB_EXT_SA] == NULL) {
2685 KFREE(newsav);
2686 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2687 *errp = EINVAL;
2688 return NULL;
2689 }
2690 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2691 newsav->spi = xsa->sadb_sa_spi;
2692 newsav->seq = mhp->msg->sadb_msg_seq;
2693 break;
2694 default:
2695 KFREE(newsav);
2696 *errp = EINVAL;
2697 return NULL;
2698 }
2699
2700 /* copy sav values */
2701 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2702 *errp = key_setsaval(newsav, m, mhp);
2703 if (*errp) {
2704 KFREE(newsav);
2705 return NULL;
2706 }
2707 }
2708
2709 /* reset created */
2710 {
2711 struct timeval tv;
2712 microtime(&tv);
2713 newsav->created = tv.tv_sec;
2714 }
2715
2716 newsav->pid = mhp->msg->sadb_msg_pid;
2717
2718 /* add to satree */
2719 newsav->sah = sah;
2720 newsav->refcnt = 1;
2721 newsav->state = SADB_SASTATE_LARVAL;
2722 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2723 secasvar, chain);
2724
2725 return newsav;
2726 }
2727
2728 /*
2729 * free() SA variable entry.
2730 */
2731 static void
2732 key_delsav(struct secasvar *sav)
2733 {
2734 /* sanity check */
2735 if (sav == NULL)
2736 panic("key_delsav: NULL pointer is passed.\n");
2737
2738 if (sav->refcnt > 0)
2739 return; /* can't free */
2740
2741 /* remove from SA header */
2742 if (__LIST_CHAINED(sav))
2743 LIST_REMOVE(sav, chain);
2744
2745 if (sav->key_auth != NULL) {
2746 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2747 KFREE(sav->key_auth);
2748 sav->key_auth = NULL;
2749 }
2750 if (sav->key_enc != NULL) {
2751 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2752 KFREE(sav->key_enc);
2753 sav->key_enc = NULL;
2754 }
2755 if (sav->sched) {
2756 bzero(sav->sched, sav->schedlen);
2757 KFREE(sav->sched);
2758 sav->sched = NULL;
2759 }
2760 if (sav->replay != NULL) {
2761 keydb_delsecreplay(sav->replay);
2762 sav->replay = NULL;
2763 }
2764 if (sav->lft_c != NULL) {
2765 KFREE(sav->lft_c);
2766 sav->lft_c = NULL;
2767 }
2768 if (sav->lft_h != NULL) {
2769 KFREE(sav->lft_h);
2770 sav->lft_h = NULL;
2771 }
2772 if (sav->lft_s != NULL) {
2773 KFREE(sav->lft_s);
2774 sav->lft_s = NULL;
2775 }
2776 if (sav->iv != NULL) {
2777 KFREE(sav->iv);
2778 sav->iv = NULL;
2779 }
2780
2781 KFREE(sav);
2782
2783 return;
2784 }
2785
2786 /*
2787 * search SAD.
2788 * OUT:
2789 * NULL : not found
2790 * others : found, pointer to a SA.
2791 */
2792 static struct secashead *
2793 key_getsah(struct secasindex *saidx)
2794 {
2795 struct secashead *sah;
2796
2797 LIST_FOREACH(sah, &sahtree, chain) {
2798 if (sah->state == SADB_SASTATE_DEAD)
2799 continue;
2800 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2801 return sah;
2802 }
2803
2804 return NULL;
2805 }
2806
2807 /*
2808 * check not to be duplicated SPI.
2809 * NOTE: this function is too slow due to searching all SAD.
2810 * OUT:
2811 * NULL : not found
2812 * others : found, pointer to a SA.
2813 */
2814 static struct secasvar *
2815 key_checkspidup(struct secasindex *saidx, u_int32_t spi)
2816 {
2817 struct secashead *sah;
2818 struct secasvar *sav;
2819
2820 /* check address family */
2821 if (saidx->src.ss_family != saidx->dst.ss_family) {
2822 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2823 return NULL;
2824 }
2825
2826 /* check all SAD */
2827 LIST_FOREACH(sah, &sahtree, chain) {
2828 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2829 continue;
2830 sav = key_getsavbyspi(sah, spi);
2831 if (sav != NULL)
2832 return sav;
2833 }
2834
2835 return NULL;
2836 }
2837
2838 /*
2839 * search SAD litmited alive SA, protocol, SPI.
2840 * OUT:
2841 * NULL : not found
2842 * others : found, pointer to a SA.
2843 */
2844 static struct secasvar *
2845 key_getsavbyspi(struct secashead *sah, u_int32_t spi)
2846 {
2847 struct secasvar *sav;
2848 u_int stateidx, state;
2849
2850 /* search all status */
2851 for (stateidx = 0;
2852 stateidx < _ARRAYLEN(saorder_state_alive);
2853 stateidx++) {
2854
2855 state = saorder_state_alive[stateidx];
2856 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2857
2858 /* sanity check */
2859 if (sav->state != state) {
2860 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2861 "invalid sav->state (queue: %d SA: %d)\n",
2862 state, sav->state));
2863 continue;
2864 }
2865
2866 if (sav->spi == spi)
2867 return sav;
2868 }
2869 }
2870
2871 return NULL;
2872 }
2873
2874 /*
2875 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2876 * You must update these if need.
2877 * OUT: 0: success.
2878 * !0: failure.
2879 *
2880 * does not modify mbuf. does not free mbuf on error.
2881 */
2882 static int
2883 key_setsaval(struct secasvar *sav, struct mbuf *m,
2884 const struct sadb_msghdr *mhp)
2885 {
2886 #ifdef IPSEC_ESP
2887 const struct esp_algorithm *algo;
2888 #endif
2889 int error = 0;
2890 struct timeval tv;
2891
2892 /* sanity check */
2893 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2894 panic("key_setsaval: NULL pointer is passed.\n");
2895
2896 /* initialization */
2897 sav->replay = NULL;
2898 sav->key_auth = NULL;
2899 sav->key_enc = NULL;
2900 sav->sched = NULL;
2901 sav->schedlen = 0;
2902 sav->iv = NULL;
2903 sav->lft_c = NULL;
2904 sav->lft_h = NULL;
2905 sav->lft_s = NULL;
2906
2907 /* SA */
2908 if (mhp->ext[SADB_EXT_SA] != NULL) {
2909 const struct sadb_sa *sa0;
2910
2911 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2912 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2913 error = EINVAL;
2914 goto fail;
2915 }
2916
2917 sav->alg_auth = sa0->sadb_sa_auth;
2918 sav->alg_enc = sa0->sadb_sa_encrypt;
2919 sav->flags = sa0->sadb_sa_flags;
2920
2921 /* replay window */
2922 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
2923 sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay);
2924 if (sav->replay == NULL) {
2925 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2926 error = ENOBUFS;
2927 goto fail;
2928 }
2929 }
2930 }
2931
2932 /* Authentication keys */
2933 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2934 const struct sadb_key *key0;
2935 int len;
2936
2937 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2938 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2939
2940 error = 0;
2941 if (len < sizeof(*key0)) {
2942 error = EINVAL;
2943 goto fail;
2944 }
2945 switch (mhp->msg->sadb_msg_satype) {
2946 case SADB_SATYPE_AH:
2947 case SADB_SATYPE_ESP:
2948 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2949 sav->alg_auth != SADB_X_AALG_NULL)
2950 error = EINVAL;
2951 break;
2952 case SADB_X_SATYPE_IPCOMP:
2953 default:
2954 error = EINVAL;
2955 break;
2956 }
2957 if (error) {
2958 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2959 goto fail;
2960 }
2961
2962 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2963 if (sav->key_auth == NULL) {
2964 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2965 error = ENOBUFS;
2966 goto fail;
2967 }
2968 }
2969
2970 /* Encryption key */
2971 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2972 const struct sadb_key *key0;
2973 int len;
2974
2975 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2976 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2977
2978 error = 0;
2979 if (len < sizeof(*key0)) {
2980 error = EINVAL;
2981 goto fail;
2982 }
2983 switch (mhp->msg->sadb_msg_satype) {
2984 case SADB_SATYPE_ESP:
2985 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2986 sav->alg_enc != SADB_EALG_NULL) {
2987 error = EINVAL;
2988 break;
2989 }
2990 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
2991 if (sav->key_enc == NULL) {
2992 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2993 error = ENOBUFS;
2994 goto fail;
2995 }
2996 break;
2997 case SADB_X_SATYPE_IPCOMP:
2998 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
2999 error = EINVAL;
3000 sav->key_enc = NULL; /*just in case*/
3001 break;
3002 case SADB_SATYPE_AH:
3003 default:
3004 error = EINVAL;
3005 break;
3006 }
3007 if (error) {
3008 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3009 goto fail;
3010 }
3011 }
3012
3013 /* set iv */
3014 sav->ivlen = 0;
3015
3016 switch (mhp->msg->sadb_msg_satype) {
3017 case SADB_SATYPE_ESP:
3018 #ifdef IPSEC_ESP
3019 algo = esp_algorithm_lookup(sav->alg_enc);
3020 if (algo && algo->ivlen)
3021 sav->ivlen = (*algo->ivlen)(algo, sav);
3022 if (sav->ivlen == 0)
3023 break;
3024 KMALLOC(sav->iv, caddr_t, sav->ivlen);
3025 if (sav->iv == 0) {
3026 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3027 error = ENOBUFS;
3028 goto fail;
3029 }
3030
3031 /* initialize */
3032 key_randomfill(sav->iv, sav->ivlen);
3033 #endif
3034 break;
3035 case SADB_SATYPE_AH:
3036 case SADB_X_SATYPE_IPCOMP:
3037 break;
3038 default:
3039 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
3040 error = EINVAL;
3041 goto fail;
3042 }
3043
3044 /* reset created */
3045 microtime(&tv);
3046 sav->created = tv.tv_sec;
3047
3048 /* make lifetime for CURRENT */
3049 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3050 sizeof(struct sadb_lifetime));
3051 if (sav->lft_c == NULL) {
3052 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3053 error = ENOBUFS;
3054 goto fail;
3055 }
3056
3057 microtime(&tv);
3058
3059 sav->lft_c->sadb_lifetime_len =
3060 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3061 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3062 sav->lft_c->sadb_lifetime_allocations = 0;
3063 sav->lft_c->sadb_lifetime_bytes = 0;
3064 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3065 sav->lft_c->sadb_lifetime_usetime = 0;
3066
3067 /* lifetimes for HARD and SOFT */
3068 {
3069 const struct sadb_lifetime *lft0;
3070
3071 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3072 if (lft0 != NULL) {
3073 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3074 error = EINVAL;
3075 goto fail;
3076 }
3077 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3078 sizeof(*lft0));
3079 if (sav->lft_h == NULL) {
3080 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3081 error = ENOBUFS;
3082 goto fail;
3083 }
3084 /* to be initialize ? */
3085 }
3086
3087 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3088 if (lft0 != NULL) {
3089 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3090 error = EINVAL;
3091 goto fail;
3092 }
3093 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3094 sizeof(*lft0));
3095 if (sav->lft_s == NULL) {
3096 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3097 error = ENOBUFS;
3098 goto fail;
3099 }
3100 /* to be initialize ? */
3101 }
3102 }
3103
3104 return 0;
3105
3106 fail:
3107 /* initialization */
3108 if (sav->replay != NULL) {
3109 keydb_delsecreplay(sav->replay);
3110 sav->replay = NULL;
3111 }
3112 if (sav->key_auth != NULL) {
3113 KFREE(sav->key_auth);
3114 sav->key_auth = NULL;
3115 }
3116 if (sav->key_enc != NULL) {
3117 KFREE(sav->key_enc);
3118 sav->key_enc = NULL;
3119 }
3120 if (sav->sched) {
3121 KFREE(sav->sched);
3122 sav->sched = NULL;
3123 }
3124 if (sav->iv != NULL) {
3125 KFREE(sav->iv);
3126 sav->iv = NULL;
3127 }
3128 if (sav->lft_c != NULL) {
3129 KFREE(sav->lft_c);
3130 sav->lft_c = NULL;
3131 }
3132 if (sav->lft_h != NULL) {
3133 KFREE(sav->lft_h);
3134 sav->lft_h = NULL;
3135 }
3136 if (sav->lft_s != NULL) {
3137 KFREE(sav->lft_s);
3138 sav->lft_s = NULL;
3139 }
3140
3141 return error;
3142 }
3143
3144 /*
3145 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3146 * OUT: 0: valid
3147 * other: errno
3148 */
3149 static int
3150 key_mature(struct secasvar *sav)
3151 {
3152 int mature;
3153 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3154 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3155
3156 mature = 0;
3157
3158 /* check SPI value */
3159 switch (sav->sah->saidx.proto) {
3160 case IPPROTO_ESP:
3161 case IPPROTO_AH:
3162 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3163 ipseclog((LOG_DEBUG,
3164 "key_mature: illegal range of SPI %u.\n",
3165 (u_int32_t)ntohl(sav->spi)));
3166 return EINVAL;
3167 }
3168 break;
3169 }
3170
3171 /* check satype */
3172 switch (sav->sah->saidx.proto) {
3173 case IPPROTO_ESP:
3174 /* check flags */
3175 if ((sav->flags & SADB_X_EXT_OLD)
3176 && (sav->flags & SADB_X_EXT_DERIV)) {
3177 ipseclog((LOG_DEBUG, "key_mature: "
3178 "invalid flag (derived) given to old-esp.\n"));
3179 return EINVAL;
3180 }
3181 if (sav->alg_auth == SADB_AALG_NONE)
3182 checkmask = 1;
3183 else
3184 checkmask = 3;
3185 mustmask = 1;
3186 break;
3187 case IPPROTO_AH:
3188 /* check flags */
3189 if (sav->flags & SADB_X_EXT_DERIV) {
3190 ipseclog((LOG_DEBUG, "key_mature: "
3191 "invalid flag (derived) given to AH SA.\n"));
3192 return EINVAL;
3193 }
3194 if (sav->alg_enc != SADB_EALG_NONE) {
3195 ipseclog((LOG_DEBUG, "key_mature: "
3196 "protocol and algorithm mismated.\n"));
3197 return(EINVAL);
3198 }
3199 checkmask = 2;
3200 mustmask = 2;
3201 break;
3202 case IPPROTO_IPCOMP:
3203 if (sav->alg_auth != SADB_AALG_NONE) {
3204 ipseclog((LOG_DEBUG, "key_mature: "
3205 "protocol and algorithm mismated.\n"));
3206 return(EINVAL);
3207 }
3208 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3209 && ntohl(sav->spi) >= 0x10000) {
3210 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3211 return(EINVAL);
3212 }
3213 checkmask = 4;
3214 mustmask = 4;
3215 break;
3216 default:
3217 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3218 return EPROTONOSUPPORT;
3219 }
3220
3221 /* check authentication algorithm */
3222 if ((checkmask & 2) != 0) {
3223 const struct ah_algorithm *algo;
3224 int keylen;
3225
3226 algo = ah_algorithm_lookup(sav->alg_auth);
3227 if (!algo) {
3228 ipseclog((LOG_DEBUG,"key_mature: "
3229 "unknown authentication algorithm.\n"));
3230 return EINVAL;
3231 }
3232
3233 /* algorithm-dependent check */
3234 if (sav->key_auth)
3235 keylen = sav->key_auth->sadb_key_bits;
3236 else
3237 keylen = 0;
3238 if (keylen < algo->keymin || algo->keymax < keylen) {
3239 ipseclog((LOG_DEBUG,
3240 "key_mature: invalid AH key length %d "
3241 "(%d-%d allowed)\n",
3242 keylen, algo->keymin, algo->keymax));
3243 return EINVAL;
3244 }
3245
3246 if (algo->mature) {
3247 if ((*algo->mature)(sav)) {
3248 /* message generated in per-algorithm function*/
3249 return EINVAL;
3250 } else
3251 mature = SADB_SATYPE_AH;
3252 }
3253
3254 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
3255 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
3256 return EINVAL;
3257 }
3258 }
3259
3260 /* check encryption algorithm */
3261 if ((checkmask & 1) != 0) {
3262 #ifdef IPSEC_ESP
3263 const struct esp_algorithm *algo;
3264 int keylen;
3265
3266 algo = esp_algorithm_lookup(sav->alg_enc);
3267 if (!algo) {
3268 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
3269 return EINVAL;
3270 }
3271
3272 /* algorithm-dependent check */
3273 if (sav->key_enc)
3274 keylen = sav->key_enc->sadb_key_bits;
3275 else
3276 keylen = 0;
3277 if (keylen < algo->keymin || algo->keymax < keylen) {
3278 ipseclog((LOG_DEBUG,
3279 "key_mature: invalid ESP key length %d "
3280 "(%d-%d allowed)\n",
3281 keylen, algo->keymin, algo->keymax));
3282 return EINVAL;
3283 }
3284
3285 if (algo->mature) {
3286 if ((*algo->mature)(sav)) {
3287 /* message generated in per-algorithm function*/
3288 return EINVAL;
3289 } else
3290 mature = SADB_SATYPE_ESP;
3291 }
3292
3293 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
3294 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
3295 return EINVAL;
3296 }
3297 #else /*IPSEC_ESP*/
3298 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
3299 return EINVAL;
3300 #endif
3301 }
3302
3303 /* check compression algorithm */
3304 if ((checkmask & 4) != 0) {
3305 const struct ipcomp_algorithm *algo;
3306
3307 /* algorithm-dependent check */
3308 algo = ipcomp_algorithm_lookup(sav->alg_enc);
3309 if (!algo) {
3310 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
3311 return EINVAL;
3312 }
3313 }
3314
3315 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3316
3317 return 0;
3318 }
3319
3320 /*
3321 * subroutine for SADB_GET and SADB_DUMP.
3322 */
3323 static struct mbuf *
3324 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3325 u_int32_t seq, u_int32_t pid)
3326 {
3327 struct mbuf *result = NULL, *tres = NULL, *m;
3328 int l = 0;
3329 int i;
3330 void *p;
3331 int dumporder[] = {
3332 SADB_EXT_SA, SADB_X_EXT_SA2,
3333 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3334 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3335 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3336 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3337 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3338 };
3339
3340 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3341 if (m == NULL)
3342 goto fail;
3343 result = m;
3344
3345 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3346 m = NULL;
3347 p = NULL;
3348 switch (dumporder[i]) {
3349 case SADB_EXT_SA:
3350 m = key_setsadbsa(sav);
3351 if (!m)
3352 goto fail;
3353 break;
3354
3355 case SADB_X_EXT_SA2:
3356 m = key_setsadbxsa2(sav->sah->saidx.mode,
3357 sav->replay ? sav->replay->count : 0,
3358 sav->sah->saidx.reqid);
3359 if (!m)
3360 goto fail;
3361 break;
3362
3363 case SADB_EXT_ADDRESS_SRC:
3364 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3365 (struct sockaddr *)&sav->sah->saidx.src,
3366 FULLMASK, IPSEC_ULPROTO_ANY);
3367 if (!m)
3368 goto fail;
3369 break;
3370
3371 case SADB_EXT_ADDRESS_DST:
3372 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3373 (struct sockaddr *)&sav->sah->saidx.dst,
3374 FULLMASK, IPSEC_ULPROTO_ANY);
3375 if (!m)
3376 goto fail;
3377 break;
3378
3379 case SADB_EXT_KEY_AUTH:
3380 if (!sav->key_auth)
3381 continue;
3382 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3383 p = sav->key_auth;
3384 break;
3385
3386 case SADB_EXT_KEY_ENCRYPT:
3387 if (!sav->key_enc)
3388 continue;
3389 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3390 p = sav->key_enc;
3391 break;
3392
3393 case SADB_EXT_LIFETIME_CURRENT:
3394 if (!sav->lft_c)
3395 continue;
3396 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3397 p = sav->lft_c;
3398 break;
3399
3400 case SADB_EXT_LIFETIME_HARD:
3401 if (!sav->lft_h)
3402 continue;
3403 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3404 p = sav->lft_h;
3405 break;
3406
3407 case SADB_EXT_LIFETIME_SOFT:
3408 if (!sav->lft_s)
3409 continue;
3410 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3411 p = sav->lft_s;
3412 break;
3413
3414 case SADB_EXT_ADDRESS_PROXY:
3415 case SADB_EXT_IDENTITY_SRC:
3416 case SADB_EXT_IDENTITY_DST:
3417 /* XXX: should we brought from SPD ? */
3418 case SADB_EXT_SENSITIVITY:
3419 default:
3420 continue;
3421 }
3422
3423 if ((!m && !p) || (m && p))
3424 goto fail;
3425 if (p && tres) {
3426 M_PREPEND(tres, l, MB_DONTWAIT);
3427 if (!tres)
3428 goto fail;
3429 bcopy(p, mtod(tres, caddr_t), l);
3430 continue;
3431 }
3432 if (p) {
3433 m = key_alloc_mbuf(l);
3434 if (!m)
3435 goto fail;
3436 m_copyback(m, 0, l, p);
3437 }
3438
3439 if (tres)
3440 m_cat(m, tres);
3441 tres = m;
3442 }
3443
3444 m_cat(result, tres);
3445
3446 if (result->m_len < sizeof(struct sadb_msg)) {
3447 result = m_pullup(result, sizeof(struct sadb_msg));
3448 if (result == NULL)
3449 goto fail;
3450 }
3451
3452 result->m_pkthdr.len = 0;
3453 for (m = result; m; m = m->m_next)
3454 result->m_pkthdr.len += m->m_len;
3455
3456 mtod(result, struct sadb_msg *)->sadb_msg_len =
3457 PFKEY_UNIT64(result->m_pkthdr.len);
3458
3459 return result;
3460
3461 fail:
3462 m_freem(result);
3463 m_freem(tres);
3464 return NULL;
3465 }
3466
3467 /*
3468 * set data into sadb_msg.
3469 */
3470 static struct mbuf *
3471 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3472 u_int32_t seq, pid_t pid, u_int16_t reserved)
3473 {
3474 struct mbuf *m;
3475 struct sadb_msg *p;
3476 int len;
3477
3478 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3479 if (len > MCLBYTES)
3480 return NULL;
3481 MGETHDR(m, MB_DONTWAIT, MT_DATA);
3482 if (m && len > MHLEN) {
3483 MCLGET(m, MB_DONTWAIT);
3484 if ((m->m_flags & M_EXT) == 0) {
3485 m_freem(m);
3486 m = NULL;
3487 }
3488 }
3489 if (!m)
3490 return NULL;
3491 m->m_pkthdr.len = m->m_len = len;
3492 m->m_next = NULL;
3493
3494 p = mtod(m, struct sadb_msg *);
3495
3496 bzero(p, len);
3497 p->sadb_msg_version = PF_KEY_V2;
3498 p->sadb_msg_type = type;
3499 p->sadb_msg_errno = 0;
3500 p->sadb_msg_satype = satype;
3501 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3502 p->sadb_msg_reserved = reserved;
3503 p->sadb_msg_seq = seq;
3504 p->sadb_msg_pid = (u_int32_t)pid;
3505
3506 return m;
3507 }
3508
3509 /*
3510 * copy secasvar data into sadb_address.
3511 */
3512 static struct mbuf *
3513 key_setsadbsa(struct secasvar *sav)
3514 {
3515 struct mbuf *m;
3516 struct sadb_sa *p;
3517 int len;
3518
3519 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3520 m = key_alloc_mbuf(len);
3521 if (!m || m->m_next) { /*XXX*/
3522 if (m)
3523 m_freem(m);
3524 return NULL;
3525 }
3526
3527 p = mtod(m, struct sadb_sa *);
3528
3529 bzero(p, len);
3530 p->sadb_sa_len = PFKEY_UNIT64(len);
3531 p->sadb_sa_exttype = SADB_EXT_SA;
3532 p->sadb_sa_spi = sav->spi;
3533 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3534 p->sadb_sa_state = sav->state;
3535 p->sadb_sa_auth = sav->alg_auth;
3536 p->sadb_sa_encrypt = sav->alg_enc;
3537 p->sadb_sa_flags = sav->flags;
3538
3539 return m;
3540 }
3541
3542 /*
3543 * set data into sadb_address.
3544 */
3545 static struct mbuf *
3546 key_setsadbaddr(u_int16_t exttype, struct sockaddr *saddr,
3547 u_int8_t prefixlen, u_int16_t ul_proto)
3548 {
3549 struct mbuf *m;
3550 struct sadb_address *p;
3551 size_t len;
3552
3553 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3554 PFKEY_ALIGN8(saddr->sa_len);
3555 m = key_alloc_mbuf(len);
3556 if (!m || m->m_next) { /*XXX*/
3557 if (m)
3558 m_freem(m);
3559 return NULL;
3560 }
3561
3562 p = mtod(m, struct sadb_address *);
3563
3564 bzero(p, len);
3565 p->sadb_address_len = PFKEY_UNIT64(len);
3566 p->sadb_address_exttype = exttype;
3567 p->sadb_address_proto = ul_proto;
3568 if (prefixlen == FULLMASK) {
3569 switch (saddr->sa_family) {
3570 case AF_INET:
3571 prefixlen = sizeof(struct in_addr) << 3;
3572 break;
3573 case AF_INET6:
3574 prefixlen = sizeof(struct in6_addr) << 3;
3575 break;
3576 default:
3577 ; /*XXX*/
3578 }
3579 }
3580 p->sadb_address_prefixlen = prefixlen;
3581 p->sadb_address_reserved = 0;
3582
3583 bcopy(saddr,
3584 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3585 saddr->sa_len);
3586
3587 return m;
3588 }
3589
3590 #if 0
3591 /*
3592 * set data into sadb_ident.
3593 */
3594 static struct mbuf *
3595 key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3596 int stringlen, u_int64_t id)
3597 {
3598 struct mbuf *m;
3599 struct sadb_ident *p;
3600 size_t len;
3601
3602 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3603 m = key_alloc_mbuf(len);
3604 if (!m || m->m_next) { /*XXX*/
3605 if (m)
3606 m_freem(m);
3607 return NULL;
3608 }
3609
3610 p = mtod(m, struct sadb_ident *);
3611
3612 bzero(p, len);
3613 p->sadb_ident_len = PFKEY_UNIT64(len);
3614 p->sadb_ident_exttype = exttype;
3615 p->sadb_ident_type = idtype;
3616 p->sadb_ident_reserved = 0;
3617 p->sadb_ident_id = id;
3618
3619 bcopy(string,
3620 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3621 stringlen);
3622
3623 return m;
3624 }
3625 #endif
3626
3627 /*
3628 * set data into sadb_x_sa2.
3629 */
3630 static struct mbuf *
3631 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3632 {
3633 struct mbuf *m;
3634 struct sadb_x_sa2 *p;
3635 size_t len;
3636
3637 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3638 m = key_alloc_mbuf(len);
3639 if (!m || m->m_next) { /*XXX*/
3640 if (m)
3641 m_freem(m);
3642 return NULL;
3643 }
3644
3645 p = mtod(m, struct sadb_x_sa2 *);
3646
3647 bzero(p, len);
3648 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3649 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3650 p->sadb_x_sa2_mode = mode;
3651 p->sadb_x_sa2_reserved1 = 0;
3652 p->sadb_x_sa2_reserved2 = 0;
3653 p->sadb_x_sa2_sequence = seq;
3654 p->sadb_x_sa2_reqid = reqid;
3655
3656 return m;
3657 }
3658
3659 /*
3660 * set data into sadb_x_policy
3661 */
3662 static struct mbuf *
3663 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
3664 {
3665 struct mbuf *m;
3666 struct sadb_x_policy *p;
3667 size_t len;
3668
3669 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3670 m = key_alloc_mbuf(len);
3671 if (!m || m->m_next) { /*XXX*/
3672 if (m)
3673 m_freem(m);
3674 return NULL;
3675 }
3676
3677 p = mtod(m, struct sadb_x_policy *);
3678
3679 bzero(p, len);
3680 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3681 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3682 p->sadb_x_policy_type = type;
3683 p->sadb_x_policy_dir = dir;
3684 p->sadb_x_policy_id = id;
3685
3686 return m;
3687 }
3688
3689 /* %%% utilities */
3690 /*
3691 * copy a buffer into the new buffer allocated.
3692 */
3693 static void *
3694 key_newbuf(const void *src, u_int len)
3695 {
3696 caddr_t new;
3697
3698 KMALLOC(new, caddr_t, len);
3699 if (new == NULL) {
3700 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3701 return NULL;
3702 }
3703 bcopy(src, new, len);
3704
3705 return new;
3706 }
3707
3708 /* compare my own address
3709 * OUT: 1: true, i.e. my address.
3710 * 0: false
3711 */
3712 int
3713 key_ismyaddr(struct sockaddr *sa)
3714 {
3715 #ifdef INET
3716 struct sockaddr_in *sin;
3717 struct in_ifaddr_container *iac;
3718 #endif
3719
3720 /* sanity check */
3721 if (sa == NULL)
3722 panic("key_ismyaddr: NULL pointer is passed.\n");
3723
3724 switch (sa->sa_family) {
3725 #ifdef INET
3726 case AF_INET:
3727 sin = (struct sockaddr_in *)sa;
3728 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
3729 struct in_ifaddr *ia = iac->ia;
3730
3731 if (sin->sin_family == ia->ia_addr.sin_family &&
3732 sin->sin_len == ia->ia_addr.sin_len &&
3733 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3734 {
3735 return 1;
3736 }
3737 }
3738 break;
3739 #endif
3740 #ifdef INET6
3741 case AF_INET6:
3742 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3743 #endif
3744 }
3745
3746 return 0;
3747 }
3748
3749 #ifdef INET6
3750 /*
3751 * compare my own address for IPv6.
3752 * 1: ours
3753 * 0: other
3754 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3755 */
3756 #include <netinet6/in6_var.h>
3757
3758 static int
3759 key_ismyaddr6(struct sockaddr_in6 *sin6)
3760 {
3761 struct in6_ifaddr *ia;
3762 struct in6_multi *in6m;
3763
3764 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3765 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3766 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3767 return 1;
3768
3769 /*
3770 * XXX Multicast
3771 * XXX why do we care about multlicast here while we don't care
3772 * about IPv4 multicast??
3773 * XXX scope
3774 */
3775 in6m = NULL;
3776 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3777 if (in6m)
3778 return 1;
3779 }
3780
3781 /* loopback, just for safety */
3782 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3783 return 1;
3784
3785 return 0;
3786 }
3787 #endif /*INET6*/
3788
3789 /*
3790 * compare two secasindex structure.
3791 * flag can specify to compare 2 saidxes.
3792 * compare two secasindex structure without both mode and reqid.
3793 * don't compare port.
3794 * IN:
3795 * saidx0: source, it can be in SAD.
3796 * saidx1: object.
3797 * OUT:
3798 * 1 : equal
3799 * 0 : not equal
3800 */
3801 static int
3802 key_cmpsaidx(struct secasindex *saidx0, struct secasindex *saidx1,
3803 int flag)
3804 {
3805 /* sanity */
3806 if (saidx0 == NULL && saidx1 == NULL)
3807 return 1;
3808
3809 if (saidx0 == NULL || saidx1 == NULL)
3810 return 0;
3811
3812 if (saidx0->proto != saidx1->proto)
3813 return 0;
3814
3815 if (flag == CMP_EXACTLY) {
3816 if (saidx0->mode != saidx1->mode)
3817 return 0;
3818 if (saidx0->reqid != saidx1->reqid)
3819 return 0;
3820 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
3821 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
3822 return 0;
3823 } else {
3824
3825 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3826 if (flag == CMP_MODE_REQID
3827 ||flag == CMP_REQID) {
3828 /*
3829 * If reqid of SPD is non-zero, unique SA is required.
3830 * The result must be of same reqid in this case.
3831 */
3832 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3833 return 0;
3834 }
3835
3836 if (flag == CMP_MODE_REQID) {
3837 if (saidx0->mode != IPSEC_MODE_ANY
3838 && saidx0->mode != saidx1->mode)
3839 return 0;
3840 }
3841
3842 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
3843 (struct sockaddr *)&saidx1->src, 0) != 0) {
3844 return 0;
3845 }
3846 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
3847 (struct sockaddr *)&saidx1->dst, 0) != 0) {
3848 return 0;
3849 }
3850 }
3851
3852 return 1;
3853 }
3854
3855 /*
3856 * compare two secindex structure exactly.
3857 * IN:
3858 * spidx0: source, it is often in SPD.
3859 * spidx1: object, it is often from PFKEY message.
3860 * OUT:
3861 * 1 : equal
3862 * 0 : not equal
3863 */
3864 static int
3865 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
3866 struct secpolicyindex *spidx1)
3867 {
3868 /* sanity */
3869 if (spidx0 == NULL && spidx1 == NULL)
3870 return 1;
3871
3872 if (spidx0 == NULL || spidx1 == NULL)
3873 return 0;
3874
3875 if (spidx0->prefs != spidx1->prefs
3876 || spidx0->prefd != spidx1->prefd
3877 || spidx0->ul_proto != spidx1->ul_proto)
3878 return 0;
3879
3880 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
3881 (struct sockaddr *)&spidx1->src, 1) != 0) {
3882 return 0;
3883 }
3884 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
3885 (struct sockaddr *)&spidx1->dst, 1) != 0) {
3886 return 0;
3887 }
3888
3889 return 1;
3890 }
3891
3892 /*
3893 * compare two secindex structure with mask.
3894 * IN:
3895 * spidx0: source, it is often in SPD.
3896 * spidx1: object, it is often from IP header.
3897 * OUT:
3898 * 1 : equal
3899 * 0 : not equal
3900 */
3901 static int
3902 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
3903 struct secpolicyindex *spidx1)
3904 {
3905 /* sanity */
3906 if (spidx0 == NULL && spidx1 == NULL)
3907 return 1;
3908
3909 if (spidx0 == NULL || spidx1 == NULL)
3910 return 0;
3911
3912 if (spidx0->src.ss_family != spidx1->src.ss_family ||
3913 spidx0->dst.ss_family != spidx1->dst.ss_family ||
3914 spidx0->src.ss_len != spidx1->src.ss_len ||
3915 spidx0->dst.ss_len != spidx1->dst.ss_len)
3916 return 0;
3917
3918 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3919 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3920 && spidx0->ul_proto != spidx1->ul_proto)
3921 return 0;
3922
3923 switch (spidx0->src.ss_family) {
3924 case AF_INET:
3925 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
3926 && satosin(&spidx0->src)->sin_port !=
3927 satosin(&spidx1->src)->sin_port)
3928 return 0;
3929 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
3930 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
3931 return 0;
3932 break;
3933 case AF_INET6:
3934 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
3935 && satosin6(&spidx0->src)->sin6_port !=
3936 satosin6(&spidx1->src)->sin6_port)
3937 return 0;
3938 /*
3939 * scope_id check. if sin6_scope_id is 0, we regard it
3940 * as a wildcard scope, which matches any scope zone ID.
3941 */
3942 if (satosin6(&spidx0->src)->sin6_scope_id &&
3943 satosin6(&spidx1->src)->sin6_scope_id &&
3944 satosin6(&spidx0->src)->sin6_scope_id !=
3945 satosin6(&spidx1->src)->sin6_scope_id)
3946 return 0;
3947 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
3948 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
3949 return 0;
3950 break;
3951 default:
3952 /* XXX */
3953 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
3954 return 0;
3955 break;
3956 }
3957
3958 switch (spidx0->dst.ss_family) {
3959 case AF_INET:
3960 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
3961 && satosin(&spidx0->dst)->sin_port !=
3962 satosin(&spidx1->dst)->sin_port)
3963 return 0;
3964 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
3965 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
3966 return 0;
3967 break;
3968 case AF_INET6:
3969 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
3970 && satosin6(&spidx0->dst)->sin6_port !=
3971 satosin6(&spidx1->dst)->sin6_port)
3972 return 0;
3973 /*
3974 * scope_id check. if sin6_scope_id is 0, we regard it
3975 * as a wildcard scope, which matches any scope zone ID.
3976 */
3977 if (satosin6(&spidx0->src)->sin6_scope_id &&
3978 satosin6(&spidx1->src)->sin6_scope_id &&
3979 satosin6(&spidx0->dst)->sin6_scope_id !=
3980 satosin6(&spidx1->dst)->sin6_scope_id)
3981 return 0;
3982 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr,
3983 (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd))
3984 return 0;
3985 break;
3986 default:
3987 /* XXX */
3988 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0)
3989 return 0;
3990 break;
3991 }
3992
3993 /* XXX Do we check other field ? e.g. flowinfo */
3994
3995 return 1;
3996 }
3997
3998 /* returns 0 on match */
3999 static int
4000 key_sockaddrcmp(struct sockaddr *sa1, struct sockaddr *sa2, int port)
4001 {
4002 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4003 return 1;
4004
4005 switch (sa1->sa_family) {
4006 case AF_INET:
4007 if (sa1->sa_len != sizeof(struct sockaddr_in))
4008 return 1;
4009 if (satosin(sa1)->sin_addr.s_addr !=
4010 satosin(sa2)->sin_addr.s_addr) {
4011 return 1;
4012 }
4013 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4014 return 1;
4015 break;
4016 case AF_INET6:
4017 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4018 return 1; /*EINVAL*/
4019 if (satosin6(sa1)->sin6_scope_id !=
4020 satosin6(sa2)->sin6_scope_id) {
4021 return 1;
4022 }
4023 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4024 &satosin6(sa2)->sin6_addr)) {
4025 return 1;
4026 }
4027 if (port &&
4028 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4029 return 1;
4030 }
4031 default:
4032 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4033 return 1;
4034 break;
4035 }
4036
4037 return 0;
4038 }
4039
4040 /*
4041 * compare two buffers with mask.
4042 * IN:
4043 * addr1: source
4044 * addr2: object
4045 * bits: Number of bits to compare
4046 * OUT:
4047 * 1 : equal
4048 * 0 : not equal
4049 */
4050 static int
4051 key_bbcmp(caddr_t p1, caddr_t p2, u_int bits)
4052 {
4053 u_int8_t mask;
4054
4055 /* XXX: This could be considerably faster if we compare a word
4056 * at a time, but it is complicated on LSB Endian machines */
4057
4058 /* Handle null pointers */
4059 if (p1 == NULL || p2 == NULL)
4060 return (p1 == p2);
4061
4062 while (bits >= 8) {
4063 if (*p1++ != *p2++)
4064 return 0;
4065 bits -= 8;
4066 }
4067
4068 if (bits > 0) {
4069 mask = ~((1<<(8-bits))-1);
4070 if ((*p1 & mask) != (*p2 & mask))
4071 return 0;
4072 }
4073 return 1; /* Match! */
4074 }
4075
4076 /*
4077 * time handler.
4078 * scanning SPD and SAD to check status for each entries,
4079 * and do to remove or to expire.
4080 * XXX: year 2038 problem may remain.
4081 */
4082 void
4083 key_timehandler(void *__dummy)
4084 {
4085 u_int dir;
4086 struct timeval tv;
4087
4088 microtime(&tv);
4089
4090 crit_enter();
4091
4092 /* SPD */
4093 {
4094 struct secpolicy *sp, *nextsp;
4095
4096 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4097 for (sp = LIST_FIRST(&sptree[dir]);
4098 sp != NULL;
4099 sp = nextsp) {
4100
4101 nextsp = LIST_NEXT(sp, chain);
4102
4103 if (sp->state == IPSEC_SPSTATE_DEAD) {
4104 key_freesp(sp);
4105 continue;
4106 }
4107
4108 if (sp->lifetime == 0 && sp->validtime == 0)
4109 continue;
4110
4111 /* the deletion will occur next time */
4112 if ((sp->lifetime
4113 && tv.tv_sec - sp->created > sp->lifetime)
4114 || (sp->validtime
4115 && tv.tv_sec - sp->lastused > sp->validtime)) {
4116 sp->state = IPSEC_SPSTATE_DEAD;
4117 key_spdexpire(sp);
4118 continue;
4119 }
4120 }
4121 }
4122 }
4123
4124 /* SAD */
4125 {
4126 struct secashead *sah, *nextsah;
4127 struct secasvar *sav, *nextsav;
4128
4129 for (sah = LIST_FIRST(&sahtree);
4130 sah != NULL;
4131 sah = nextsah) {
4132
4133 nextsah = LIST_NEXT(sah, chain);
4134
4135 /* if sah has been dead, then delete it and process next sah. */
4136 if (sah->state == SADB_SASTATE_DEAD) {
4137 key_delsah(sah);
4138 continue;
4139 }
4140
4141 /* if LARVAL entry doesn't become MATURE, delete it. */
4142 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4143 sav != NULL;
4144 sav = nextsav) {
4145
4146 nextsav = LIST_NEXT(sav, chain);
4147
4148 if (tv.tv_sec - sav->created > key_larval_lifetime) {
4149 key_freesav(sav);
4150 }
4151 }
4152
4153 /*
4154 * check MATURE entry to start to send expire message
4155 * whether or not.
4156 */
4157 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4158 sav != NULL;
4159 sav = nextsav) {
4160
4161 nextsav = LIST_NEXT(sav, chain);
4162
4163 /* we don't need to check. */
4164 if (sav->lft_s == NULL)
4165 continue;
4166
4167 /* sanity check */
4168 if (sav->lft_c == NULL) {
4169 ipseclog((LOG_DEBUG,"key_timehandler: "
4170 "There is no CURRENT time, why?\n"));
4171 continue;
4172 }
4173
4174 /* check SOFT lifetime */
4175 if (sav->lft_s->sadb_lifetime_addtime != 0
4176 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4177 /*
4178 * check the SA if it has been used.
4179 * when it hasn't been used, delete it.
4180 * i don't think such SA will be used.
4181 */
4182 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4183 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4184 key_freesav(sav);
4185 sav = NULL;
4186 } else {
4187 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4188 /*
4189 * XXX If we keep to send expire
4190 * message in the status of
4191 * DYING. Do remove below code.
4192 */
4193 key_expire(sav);
4194 }
4195 }
4196
4197 /* check SOFT lifetime by bytes */
4198 /*
4199 * XXX I don't know the way to delete this SA
4200 * when new SA is installed. Caution when it's
4201 * installed too big lifetime by time.
4202 */
4203 else if (sav->lft_s->sadb_lifetime_bytes != 0
4204 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4205
4206 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4207 /*
4208 * XXX If we keep to send expire
4209 * message in the status of
4210 * DYING. Do remove below code.
4211 */
4212 key_expire(sav);
4213 }
4214 }
4215
4216 /* check DYING entry to change status to DEAD. */
4217 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4218 sav != NULL;
4219 sav = nextsav) {
4220
4221 nextsav = LIST_NEXT(sav, chain);
4222
4223 /* we don't need to check. */
4224 if (sav->lft_h == NULL)
4225 continue;
4226
4227 /* sanity check */
4228 if (sav->lft_c == NULL) {
4229 ipseclog((LOG_DEBUG, "key_timehandler: "
4230 "There is no CURRENT time, why?\n"));
4231 continue;
4232 }
4233
4234 if (sav->lft_h->sadb_lifetime_addtime != 0
4235 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4236 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4237 key_freesav(sav);
4238 sav = NULL;
4239 }
4240 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4241 else if (sav->lft_s != NULL
4242 && sav->lft_s->sadb_lifetime_addtime != 0
4243 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4244 /*
4245 * XXX: should be checked to be
4246 * installed the valid SA.
4247 */
4248
4249 /*
4250 * If there is no SA then sending
4251 * expire message.
4252 */
4253 key_expire(sav);
4254 }
4255 #endif
4256 /* check HARD lifetime by bytes */
4257 else if (sav->lft_h->sadb_lifetime_bytes != 0
4258 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4259 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4260 key_freesav(sav);
4261 sav = NULL;
4262 }
4263 }
4264
4265 /* delete entry in DEAD */
4266 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4267 sav != NULL;
4268 sav = nextsav) {
4269
4270 nextsav = LIST_NEXT(sav, chain);
4271
4272 /* sanity check */
4273 if (sav->state != SADB_SASTATE_DEAD) {
4274 ipseclog((LOG_DEBUG, "key_timehandler: "
4275 "invalid sav->state "
4276 "(queue: %d SA: %d): "
4277 "kill it anyway\n",
4278 SADB_SASTATE_DEAD, sav->state));
4279 }
4280
4281 /*
4282 * do not call key_freesav() here.
4283 * sav should already be freed, and sav->refcnt
4284 * shows other references to sav
4285 * (such as from SPD).
4286 */
4287 }
4288 }
4289 }
4290
4291 #ifndef IPSEC_NONBLOCK_ACQUIRE
4292 /* ACQ tree */
4293 {
4294 struct secacq *acq, *nextacq;
4295
4296 for (acq = LIST_FIRST(&acqtree);
4297 acq != NULL;
4298 acq = nextacq) {
4299
4300 nextacq = LIST_NEXT(acq, chain);
4301
4302 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4303 && __LIST_CHAINED(acq)) {
4304 LIST_REMOVE(acq, chain);
4305 KFREE(acq);
4306 }
4307 }
4308 }
4309 #endif
4310
4311 /* SP ACQ tree */
4312 {
4313 struct secspacq *acq, *nextacq;
4314
4315 for (acq = LIST_FIRST(&spacqtree);
4316 acq != NULL;
4317 acq = nextacq) {
4318
4319 nextacq = LIST_NEXT(acq, chain);
4320
4321 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4322 && __LIST_CHAINED(acq)) {
4323 LIST_REMOVE(acq, chain);
4324 KFREE(acq);
4325 }
4326 }
4327 }
4328
4329 /* initialize random seed */
4330 if (key_tick_init_random++ > key_int_random) {
4331 key_tick_init_random = 0;
4332 key_srandom();
4333 }
4334
4335 #ifndef IPSEC_DEBUG2
4336 /* do exchange to tick time !! */
4337 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
4338 #endif /* IPSEC_DEBUG2 */
4339
4340 crit_exit();
4341 return;
4342 }
4343
4344 /*
4345 * to initialize a seed for random()
4346 */
4347 static void
4348 key_srandom(void)
4349 {
4350 struct timeval tv;
4351
4352 microtime(&tv);
4353
4354 skrandom(tv.tv_usec);
4355
4356 return;
4357 }
4358
4359 u_long
4360 key_random(void)
4361 {
4362 u_long value;
4363
4364 key_randomfill(&value, sizeof(value));
4365 return value;
4366 }
4367
4368 void
4369 key_randomfill(void *p, size_t l)
4370 {
4371 size_t n;
4372 u_long v;
4373 static int warn = 1;
4374
4375 n = 0;
4376 n = (size_t)read_random(p, (u_int)l);
4377 /* last resort */
4378 while (n < l) {
4379 v = krandom();
4380 bcopy(&v, (u_int8_t *)p + n,
4381 l - n < sizeof(v) ? l - n : sizeof(v));
4382 n += sizeof(v);
4383
4384 if (warn) {
4385 kprintf("WARNING: pseudo-random number generator "
4386 "used for IPsec processing\n");
4387 warn = 0;
4388 }
4389 }
4390 }
4391
4392 /*
4393 * map SADB_SATYPE_* to IPPROTO_*.
4394 * if satype == SADB_SATYPE then satype is mapped to ~0.
4395 * OUT:
4396 * 0: invalid satype.
4397 */
4398 static u_int16_t
4399 key_satype2proto(u_int8_t satype)
4400 {
4401 switch (satype) {
4402 case SADB_SATYPE_UNSPEC:
4403 return IPSEC_PROTO_ANY;
4404 case SADB_SATYPE_AH:
4405 return IPPROTO_AH;
4406 case SADB_SATYPE_ESP:
4407 return IPPROTO_ESP;
4408 case SADB_X_SATYPE_IPCOMP:
4409 return IPPROTO_IPCOMP;
4410 break;
4411 default:
4412 return 0;
4413 }
4414 /* NOTREACHED */
4415 }
4416
4417 /*
4418 * map IPPROTO_* to SADB_SATYPE_*
4419 * OUT:
4420 * 0: invalid protocol type.
4421 */
4422 static u_int8_t
4423 key_proto2satype(u_int16_t proto)
4424 {
4425 switch (proto) {
4426 case IPPROTO_AH:
4427 return SADB_SATYPE_AH;
4428 case IPPROTO_ESP:
4429 return SADB_SATYPE_ESP;
4430 case IPPROTO_IPCOMP:
4431 return SADB_X_SATYPE_IPCOMP;
4432 break;
4433 default:
4434 return 0;
4435 }
4436 /* NOTREACHED */
4437 }
4438
4439 /* %%% PF_KEY */
4440 /*
4441 * SADB_GETSPI processing is to receive
4442 * <base, (SA2), src address, dst address, (SPI range)>
4443 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4444 * tree with the status of LARVAL, and send
4445 * <base, SA(*), address(SD)>
4446 * to the IKMPd.
4447 *
4448 * IN: mhp: pointer to the pointer to each header.
4449 * OUT: NULL if fail.
4450 * other if success, return pointer to the message to send.
4451 */
4452 static int
4453 key_getspi(struct socket *so, struct mbuf *m,
4454 const struct sadb_msghdr *mhp)
4455 {
4456 struct sadb_address *src0, *dst0;
4457 struct secasindex saidx;
4458 struct secashead *newsah;
4459 struct secasvar *newsav;
4460 u_int8_t proto;
4461 u_int32_t spi;
4462 u_int8_t mode;
4463 u_int32_t reqid;
4464 int error;
4465
4466 /* sanity check */
4467 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4468 panic("key_getspi: NULL pointer is passed.\n");
4469
4470 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4471 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4472 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4473 return key_senderror(so, m, EINVAL);
4474 }
4475 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4476 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4477 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4478 return key_senderror(so, m, EINVAL);
4479 }
4480 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4481 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4482 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4483 } else {
4484 mode = IPSEC_MODE_ANY;
4485 reqid = 0;
4486 }
4487
4488 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4489 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4490
4491 /* map satype to proto */
4492 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4493 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4494 return key_senderror(so, m, EINVAL);
4495 }
4496
4497 /* make sure if port number is zero. */
4498 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4499 case AF_INET:
4500 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4501 sizeof(struct sockaddr_in))
4502 return key_senderror(so, m, EINVAL);
4503 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4504 break;
4505 case AF_INET6:
4506 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4507 sizeof(struct sockaddr_in6))
4508 return key_senderror(so, m, EINVAL);
4509 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4510 break;
4511 default:
4512 ; /*???*/
4513 }
4514 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4515 case AF_INET:
4516 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4517 sizeof(struct sockaddr_in))
4518 return key_senderror(so, m, EINVAL);
4519 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4520 break;
4521 case AF_INET6:
4522 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4523 sizeof(struct sockaddr_in6))
4524 return key_senderror(so, m, EINVAL);
4525 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4526 break;
4527 default:
4528 ; /*???*/
4529 }
4530
4531 /* XXX boundary check against sa_len */
4532 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4533
4534 /* SPI allocation */
4535 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4536 &saidx);
4537 if (spi == 0)
4538 return key_senderror(so, m, EINVAL);
4539
4540 /* get a SA index */
4541 if ((newsah = key_getsah(&saidx)) == NULL) {
4542 /* create a new SA index */
4543 if ((newsah = key_newsah(&saidx)) == NULL) {
4544 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4545 return key_senderror(so, m, ENOBUFS);
4546 }
4547 }
4548
4549 /* get a new SA */
4550 /* XXX rewrite */
4551 newsav = key_newsav(m, mhp, newsah, &error);
4552 if (newsav == NULL) {
4553 /* XXX don't free new SA index allocated in above. */
4554 return key_senderror(so, m, error);
4555 }
4556
4557 /* set spi */
4558 newsav->spi = htonl(spi);
4559
4560 #ifndef IPSEC_NONBLOCK_ACQUIRE
4561 /* delete the entry in acqtree */
4562 if (mhp->msg->sadb_msg_seq != 0) {
4563 struct secacq *acq;
4564 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4565 /* reset counter in order to deletion by timehandler. */
4566 struct timeval tv;
4567 microtime(&tv);
4568 acq->created = tv.tv_sec;
4569 acq->count = 0;
4570 }
4571 }
4572 #endif
4573
4574 {
4575 struct mbuf *n, *nn;
4576 struct sadb_sa *m_sa;
4577 struct sadb_msg *newmsg;
4578 int off, len;
4579
4580 /* create new sadb_msg to reply. */
4581 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4582 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4583 if (len > MCLBYTES)
4584 return key_senderror(so, m, ENOBUFS);
4585
4586 MGETHDR(n, MB_DONTWAIT, MT_DATA);
4587 if (len > MHLEN) {
4588 MCLGET(n, MB_DONTWAIT);
4589 if ((n->m_flags & M_EXT) == 0) {
4590 m_freem(n);
4591 n = NULL;
4592 }
4593 }
4594 if (!n)
4595 return key_senderror(so, m, ENOBUFS);
4596
4597 n->m_len = len;
4598 n->m_next = NULL;
4599 off = 0;
4600
4601 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4602 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4603
4604 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4605 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4606 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4607 m_sa->sadb_sa_spi = htonl(spi);
4608 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4609
4610 #ifdef DIAGNOSTIC
4611 if (off != len)
4612 panic("length inconsistency in key_getspi");
4613 #endif
4614
4615 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4616 SADB_EXT_ADDRESS_DST);
4617 if (!n->m_next) {
4618 m_freem(n);
4619 return key_senderror(so, m, ENOBUFS);
4620 }
4621
4622 if (n->m_len < sizeof(struct sadb_msg)) {
4623 n = m_pullup(n, sizeof(struct sadb_msg));
4624 if (n == NULL)
4625 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4626 }
4627
4628 n->m_pkthdr.len = 0;
4629 for (nn = n; nn; nn = nn->m_next)
4630 n->m_pkthdr.len += nn->m_len;
4631
4632 newmsg = mtod(n, struct sadb_msg *);
4633 newmsg->sadb_msg_seq = newsav->seq;
4634 newmsg->sadb_msg_errno = 0;
4635 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4636
4637 m_freem(m);
4638 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4639 }
4640 }
4641
4642 /*
4643 * allocating new SPI
4644 * called by key_getspi().
4645 * OUT:
4646 * 0: failure.
4647 * others: success.
4648 */
4649 static u_int32_t
4650 key_do_getnewspi(struct sadb_spirange *spirange,
4651 struct secasindex *saidx)
4652 {
4653 u_int32_t newspi;
4654 u_int32_t min, max;
4655 int count = key_spi_trycnt;
4656
4657 /* set spi range to allocate */
4658 if (spirange != NULL) {
4659 min = spirange->sadb_spirange_min;
4660 max = spirange->sadb_spirange_max;
4661 } else {
4662 min = key_spi_minval;
4663 max = key_spi_maxval;
4664 }
4665 /* IPCOMP needs 2-byte SPI */
4666 if (saidx->proto == IPPROTO_IPCOMP) {
4667 u_int32_t t;
4668 if (min >= 0x10000)
4669 min = 0xffff;
4670 if (max >= 0x10000)
4671 max = 0xffff;
4672 if (min > max) {
4673 t = min; min = max; max = t;
4674 }
4675 }
4676
4677 if (min == max) {
4678 if (key_checkspidup(saidx, min) != NULL) {
4679 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min));
4680 return 0;
4681 }
4682
4683 count--; /* taking one cost. */
4684 newspi = min;
4685
4686 } else {
4687
4688 /* init SPI */
4689 newspi = 0;
4690
4691 /* when requesting to allocate spi ranged */
4692 while (count--) {
4693 /* generate pseudo-random SPI value ranged. */
4694 newspi = min + (key_random() % (max - min + 1));
4695
4696 if (key_checkspidup(saidx, newspi) == NULL)
4697 break;
4698 }
4699
4700 if (count == 0 || newspi == 0) {
4701 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
4702 return 0;
4703 }
4704 }
4705
4706 /* statistics */
4707 keystat.getspi_count =
4708 (keystat.getspi_count + key_spi_trycnt - count) / 2;
4709
4710 return newspi;
4711 }
4712
4713 /*
4714 * SADB_UPDATE processing
4715 * receive
4716 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4717 * key(AE), (identity(SD),) (sensitivity)>
4718 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4719 * and send
4720 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4721 * (identity(SD),) (sensitivity)>
4722 * to the ikmpd.
4723 *
4724 * m will always be freed.
4725 */
4726 static int
4727 key_update(struct socket *so, struct mbuf *m,
4728 const struct sadb_msghdr *mhp)
4729 {
4730 struct sadb_sa *sa0;
4731 struct sadb_address *src0, *dst0;
4732 struct secasindex saidx;
4733 struct secashead *sah;
4734 struct secasvar *sav;
4735 u_int16_t proto;
4736 u_int8_t mode;
4737 u_int32_t reqid;
4738 int error;
4739
4740 /* sanity check */
4741 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4742 panic("key_update: NULL pointer is passed.\n");
4743
4744 /* map satype to proto */
4745 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4746 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
4747 return key_senderror(so, m, EINVAL);
4748 }
4749
4750 if (mhp->ext[SADB_EXT_SA] == NULL ||
4751 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4752 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4753 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4754 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4755 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4756 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4757 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4758 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4759 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4760 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4761 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4762 return key_senderror(so, m, EINVAL);
4763 }
4764 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4765 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4766 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4767 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4768 return key_senderror(so, m, EINVAL);
4769 }
4770 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4771 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4772 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4773 } else {
4774 mode = IPSEC_MODE_ANY;
4775 reqid = 0;
4776 }
4777 /* XXX boundary checking for other extensions */
4778
4779 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4780 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4781 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4782
4783 /* XXX boundary check against sa_len */
4784 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4785
4786 /* get a SA header */
4787 if ((sah = key_getsah(&saidx)) == NULL) {
4788 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
4789 return key_senderror(so, m, ENOENT);
4790 }
4791
4792 /* set spidx if there */
4793 /* XXX rewrite */
4794 error = key_setident(sah, m, mhp);
4795 if (error)
4796 return key_senderror(so, m, error);
4797
4798 /* find a SA with sequence number. */
4799 #ifdef IPSEC_DOSEQCHECK
4800 if (mhp->msg->sadb_msg_seq != 0
4801 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
4802 ipseclog((LOG_DEBUG,
4803 "key_update: no larval SA with sequence %u exists.\n",
4804 mhp->msg->sadb_msg_seq));
4805 return key_senderror(so, m, ENOENT);
4806 }
4807 #else
4808 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
4809 ipseclog((LOG_DEBUG,
4810 "key_update: no such a SA found (spi:%u)\n",
4811 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4812 return key_senderror(so, m, EINVAL);
4813 }
4814 #endif
4815
4816 /* validity check */
4817 if (sav->sah->saidx.proto != proto) {
4818 ipseclog((LOG_DEBUG,
4819 "key_update: protocol mismatched (DB=%u param=%u)\n",
4820 sav->sah->saidx.proto, proto));
4821 return key_senderror(so, m, EINVAL);
4822 }
4823 #ifdef IPSEC_DOSEQCHECK
4824 if (sav->spi != sa0->sadb_sa_spi) {
4825 ipseclog((LOG_DEBUG,
4826 "key_update: SPI mismatched (DB:%u param:%u)\n",
4827 (u_int32_t)ntohl(sav->spi),
4828 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4829 return key_senderror(so, m, EINVAL);
4830 }
4831 #endif
4832 if (sav->pid != mhp->msg->sadb_msg_pid) {
4833 ipseclog((LOG_DEBUG,
4834 "key_update: pid mismatched (DB:%u param:%u)\n",
4835 sav->pid, mhp->msg->sadb_msg_pid));
4836 return key_senderror(so, m, EINVAL);
4837 }
4838
4839 /* copy sav values */
4840 error = key_setsaval(sav, m, mhp);
4841 if (error) {
4842 key_freesav(sav);
4843 return key_senderror(so, m, error);
4844 }
4845
4846 /* check SA values to be mature. */
4847 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
4848 key_freesav(sav);
4849 return key_senderror(so, m, 0);
4850 }
4851
4852 {
4853 struct mbuf *n;
4854
4855 /* set msg buf from mhp */
4856 n = key_getmsgbuf_x1(m, mhp);
4857 if (n == NULL) {
4858 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4859 return key_senderror(so, m, ENOBUFS);
4860 }
4861
4862 m_freem(m);
4863 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4864 }
4865 }
4866
4867 /*
4868 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
4869 * only called by key_update().
4870 * OUT:
4871 * NULL : not found
4872 * others : found, pointer to a SA.
4873 */
4874 #ifdef IPSEC_DOSEQCHECK
4875 static struct secasvar *
4876 key_getsavbyseq(struct secashead *sah, u_int32_t seq)
4877 {
4878 struct secasvar *sav;
4879 u_int state;
4880
4881 state = SADB_SASTATE_LARVAL;
4882
4883 /* search SAD with sequence number ? */
4884 LIST_FOREACH(sav, &sah->savtree[state], chain) {
4885
4886 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
4887
4888 if (sav->seq == seq) {
4889 sav->refcnt++;
4890 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
4891 kprintf("DP key_getsavbyseq cause "
4892 "refcnt++:%d SA:%p\n",
4893 sav->refcnt, sav));
4894 return sav;
4895 }
4896 }
4897
4898 return NULL;
4899 }
4900 #endif
4901
4902 /*
4903 * SADB_ADD processing
4904 * add a entry to SA database, when received
4905 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4906 * key(AE), (identity(SD),) (sensitivity)>
4907 * from the ikmpd,
4908 * and send
4909 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4910 * (identity(SD),) (sensitivity)>
4911 * to the ikmpd.
4912 *
4913 * IGNORE identity and sensitivity messages.
4914 *
4915 * m will always be freed.
4916 */
4917 static int
4918 key_add(struct socket *so, struct mbuf *m,
4919 const struct sadb_msghdr *mhp)
4920 {
4921 struct sadb_sa *sa0;
4922 struct sadb_address *src0, *dst0;
4923 struct secasindex saidx;
4924 struct secashead *newsah;
4925 struct secasvar *newsav;
4926 u_int16_t proto;
4927 u_int8_t mode;
4928 u_int32_t reqid;
4929 int error;
4930
4931 /* sanity check */
4932 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4933 panic("key_add: NULL pointer is passed.\n");
4934
4935 /* map satype to proto */
4936 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4937 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
4938 return key_senderror(so, m, EINVAL);
4939 }
4940
4941 if (mhp->ext[SADB_EXT_SA] == NULL ||
4942 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4943 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4944 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4945 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4946 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4947 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4948 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4949 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4950 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4951 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4952 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4953 return key_senderror(so, m, EINVAL);
4954 }
4955 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4956 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4957 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4958 /* XXX need more */
4959 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4960 return key_senderror(so, m, EINVAL);
4961 }
4962 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4963 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4964 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4965 } else {
4966 mode = IPSEC_MODE_ANY;
4967 reqid = 0;
4968 }
4969
4970 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4971 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
4972 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
4973
4974 /* XXX boundary check against sa_len */
4975 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4976
4977 /* get a SA header */
4978 if ((newsah = key_getsah(&saidx)) == NULL) {
4979 /* create a new SA header */
4980 if ((newsah = key_newsah(&saidx)) == NULL) {
4981 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
4982 return key_senderror(so, m, ENOBUFS);
4983 }
4984 }
4985
4986 /* set spidx if there */
4987 /* XXX rewrite */
4988 error = key_setident(newsah, m, mhp);
4989 if (error) {
4990 return key_senderror(so, m, error);
4991 }
4992
4993 /* create new SA entry. */
4994 /* We can create new SA only if SPI is differenct. */
4995 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
4996 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
4997 return key_senderror(so, m, EEXIST);
4998 }
4999 newsav = key_newsav(m, mhp, newsah, &error);
5000 if (newsav == NULL) {
5001 return key_senderror(so, m, error);
5002 }
5003
5004 /* check SA values to be mature. */
5005 if ((error = key_mature(newsav)) != 0) {
5006 key_freesav(newsav);
5007 return key_senderror(so, m, error);
5008 }
5009
5010 /*
5011 * don't call key_freesav() here, as we would like to keep the SA
5012 * in the database on success.
5013 */
5014
5015 {
5016 struct mbuf *n;
5017
5018 /* set msg buf from mhp */
5019 n = key_getmsgbuf_x1(m, mhp);
5020 if (n == NULL) {
5021 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5022 return key_senderror(so, m, ENOBUFS);
5023 }
5024
5025 m_freem(m);
5026 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5027 }
5028 }
5029
5030 /* m is retained */
5031 static int
5032 key_setident(struct secashead *sah, struct mbuf *m,
5033 const struct sadb_msghdr *mhp)
5034 {
5035 const struct sadb_ident *idsrc, *iddst;
5036 int idsrclen, iddstlen;
5037
5038 /* sanity check */
5039 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5040 panic("key_setident: NULL pointer is passed.\n");
5041
5042 /* don't make buffer if not there */
5043 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5044 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5045 sah->idents = NULL;
5046 sah->identd = NULL;
5047 return 0;
5048 }
5049
5050 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5051 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5052 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
5053 return EINVAL;
5054 }
5055
5056 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5057 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5058 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5059 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5060
5061 /* validity check */
5062 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5063 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
5064 return EINVAL;
5065 }
5066
5067 switch (idsrc->sadb_ident_type) {
5068 case SADB_IDENTTYPE_PREFIX:
5069 case SADB_IDENTTYPE_FQDN:
5070 case SADB_IDENTTYPE_USERFQDN:
5071 default:
5072 /* XXX do nothing */
5073 sah->idents = NULL;
5074 sah->identd = NULL;
5075 return 0;
5076 }
5077
5078 /* make structure */
5079 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5080 if (sah->idents == NULL) {
5081 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5082 return ENOBUFS;
5083 }
5084 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5085 if (sah->identd == NULL) {
5086 KFREE(sah->idents);
5087 sah->idents = NULL;
5088 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5089 return ENOBUFS;
5090 }
5091 bcopy(idsrc, sah->idents, idsrclen);
5092 bcopy(iddst, sah->identd, iddstlen);
5093
5094 return 0;
5095 }
5096
5097 /*
5098 * m will not be freed on return.
5099 * it is caller's responsibility to free the result.
5100 */
5101 static struct mbuf *
5102 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5103 {
5104 struct mbuf *n;
5105
5106 /* sanity check */
5107 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5108 panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
5109
5110 /* create new sadb_msg to reply. */
5111 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5112 SADB_EXT_SA, SADB_X_EXT_SA2,
5113 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5114 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5115 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5116 if (!n)
5117 return NULL;
5118
5119 if (n->m_len < sizeof(struct sadb_msg)) {
5120 n = m_pullup(n, sizeof(struct sadb_msg));
5121 if (n == NULL)
5122 return NULL;
5123 }
5124 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5125 mtod(n, struct sadb_msg *)->sadb_msg_len =
5126 PFKEY_UNIT64(n->m_pkthdr.len);
5127
5128 return n;
5129 }
5130
5131 static int key_delete_all (struct socket *, struct mbuf *,
5132 const struct sadb_msghdr *, u_int16_t);
5133
5134 /*
5135 * SADB_DELETE processing
5136 * receive
5137 * <base, SA(*), address(SD)>
5138 * from the ikmpd, and set SADB_SASTATE_DEAD,
5139 * and send,
5140 * <base, SA(*), address(SD)>
5141 * to the ikmpd.
5142 *
5143 * m will always be freed.
5144 */
5145 static int
5146 key_delete(struct socket *so, struct mbuf *m,
5147 const struct sadb_msghdr *mhp)
5148 {
5149 struct sadb_sa *sa0;
5150 struct sadb_address *src0, *dst0;
5151 struct secasindex saidx;
5152 struct secashead *sah;
5153 struct secasvar *sav = NULL;
5154 u_int16_t proto;
5155
5156 /* sanity check */
5157 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5158 panic("key_delete: NULL pointer is passed.\n");
5159
5160 /* map satype to proto */
5161 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5162 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5163 return key_senderror(so, m, EINVAL);
5164 }
5165
5166 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5167 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5168 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5169 return key_senderror(so, m, EINVAL);
5170 }
5171
5172 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5173 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5174 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5175 return key_senderror(so, m, EINVAL);
5176 }
5177
5178 if (mhp->ext[SADB_EXT_SA] == NULL) {
5179 /*
5180 * Caller wants us to delete all non-LARVAL SAs
5181 * that match the src/dst. This is used during
5182 * IKE INITIAL-CONTACT.
5183 */
5184 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5185 return key_delete_all(so, m, mhp, proto);
5186 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5187 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5188 return key_senderror(so, m, EINVAL);
5189 }
5190
5191 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5192 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5193 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5194
5195 /* XXX boundary check against sa_len */
5196 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5197
5198 /* get a SA header */
5199 LIST_FOREACH(sah, &sahtree, chain) {
5200 if (sah->state == SADB_SASTATE_DEAD)
5201 continue;
5202 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5203 continue;
5204
5205 /* get a SA with SPI. */
5206 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5207 if (sav)
5208 break;
5209 }
5210 if (sah == NULL) {
5211 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5212 return key_senderror(so, m, ENOENT);
5213 }
5214
5215 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5216 key_freesav(sav);
5217 sav = NULL;
5218
5219 {
5220 struct mbuf *n;
5221 struct sadb_msg *newmsg;
5222
5223 /* create new sadb_msg to reply. */
5224 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5225 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5226 if (!n)
5227 return key_senderror(so, m, ENOBUFS);
5228
5229 if (n->m_len < sizeof(struct sadb_msg)) {
5230 n = m_pullup(n, sizeof(struct sadb_msg));
5231 if (n == NULL)
5232 return key_senderror(so, m, ENOBUFS);
5233 }
5234 newmsg = mtod(n, struct sadb_msg *);
5235 newmsg->sadb_msg_errno = 0;
5236 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5237
5238 m_freem(m);
5239 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5240 }
5241 }
5242
5243 /*
5244 * delete all SAs for src/dst. Called from key_delete().
5245 */
5246 static int
5247 key_delete_all(struct socket *so, struct mbuf *m,
5248 const struct sadb_msghdr *mhp, u_int16_t proto)
5249 {
5250 struct sadb_address *src0, *dst0;
5251 struct secasindex saidx;
5252 struct secashead *sah;
5253 struct secasvar *sav, *nextsav;
5254 u_int stateidx, state;
5255
5256 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5257 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5258
5259 /* XXX boundary check against sa_len */
5260 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5261
5262 LIST_FOREACH(sah, &sahtree, chain) {
5263 if (sah->state == SADB_SASTATE_DEAD)
5264 continue;
5265 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5266 continue;
5267
5268 /* Delete all non-LARVAL SAs. */
5269 for (stateidx = 0;
5270 stateidx < _ARRAYLEN(saorder_state_alive);
5271 stateidx++) {
5272 state = saorder_state_alive[stateidx];
5273 if (state == SADB_SASTATE_LARVAL)
5274 continue;
5275 for (sav = LIST_FIRST(&sah->savtree[state]);
5276 sav != NULL; sav = nextsav) {
5277 nextsav = LIST_NEXT(sav, chain);
5278 /* sanity check */
5279 if (sav->state != state) {
5280 ipseclog((LOG_DEBUG, "key_delete_all: "
5281 "invalid sav->state "
5282 "(queue: %d SA: %d)\n",
5283 state, sav->state));
5284 continue;
5285 }
5286
5287 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5288 key_freesav(sav);
5289 }
5290 }
5291 }
5292 {
5293 struct mbuf *n;
5294 struct sadb_msg *newmsg;
5295
5296 /* create new sadb_msg to reply. */
5297 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5298 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5299 if (!n)
5300 return key_senderror(so, m, ENOBUFS);
5301
5302 if (n->m_len < sizeof(struct sadb_msg)) {
5303 n = m_pullup(n, sizeof(struct sadb_msg));
5304 if (n == NULL)
5305 return key_senderror(so, m, ENOBUFS);
5306 }
5307 newmsg = mtod(n, struct sadb_msg *);
5308 newmsg->sadb_msg_errno = 0;
5309 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5310
5311 m_freem(m);
5312 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5313 }
5314 }
5315
5316 /*
5317 * SADB_GET processing
5318 * receive
5319 * <base, SA(*), address(SD)>
5320 * from the ikmpd, and get a SP and a SA to respond,
5321 * and send,
5322 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5323 * (identity(SD),) (sensitivity)>
5324 * to the ikmpd.
5325 *
5326 * m will always be freed.
5327 */
5328 static int
5329 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5330 {
5331 struct sadb_sa *sa0;
5332 struct sadb_address *src0, *dst0;
5333 struct secasindex saidx;
5334 struct secashead *sah;
5335 struct secasvar *sav = NULL;
5336 u_int16_t proto;
5337
5338 /* sanity check */
5339 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5340 panic("key_get: NULL pointer is passed.\n");
5341
5342 /* map satype to proto */
5343 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5344 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5345 return key_senderror(so, m, EINVAL);
5346 }
5347
5348 if (mhp->ext[SADB_EXT_SA] == NULL ||
5349 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5350 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5351 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5352 return key_senderror(so, m, EINVAL);
5353 }
5354 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5355 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5356 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5357 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5358 return key_senderror(so, m, EINVAL);
5359 }
5360
5361 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5362 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5363 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5364
5365 /* XXX boundary check against sa_len */
5366 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5367
5368 /* get a SA header */
5369 LIST_FOREACH(sah, &sahtree, chain) {
5370 if (sah->state == SADB_SASTATE_DEAD)
5371 continue;
5372 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5373 continue;
5374
5375 /* get a SA with SPI. */
5376 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5377 if (sav)
5378 break;
5379 }
5380 if (sah == NULL) {
5381 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5382 return key_senderror(so, m, ENOENT);
5383 }
5384
5385 {
5386 struct mbuf *n;
5387 u_int8_t satype;
5388
5389 /* map proto to satype */
5390 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5391 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5392 return key_senderror(so, m, EINVAL);
5393 }
5394
5395 /* create new sadb_msg to reply. */
5396 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5397 mhp->msg->sadb_msg_pid);
5398 if (!n)
5399 return key_senderror(so, m, ENOBUFS);
5400
5401 m_freem(m);
5402 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5403 }
5404 }
5405
5406 /* XXX make it sysctl-configurable? */
5407 static void
5408 key_getcomb_setlifetime(struct sadb_comb *comb)
5409 {
5410
5411 comb->sadb_comb_soft_allocations = 1;
5412 comb->sadb_comb_hard_allocations = 1;
5413 comb->sadb_comb_soft_bytes = 0;
5414 comb->sadb_comb_hard_bytes = 0;
5415 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5416 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5417 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5418 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5419 }
5420
5421 #ifdef IPSEC_ESP
5422 /*
5423 * XXX reorder combinations by preference
5424 * XXX no idea if the user wants ESP authentication or not
5425 */
5426 static struct mbuf *
5427 key_getcomb_esp(void)
5428 {
5429 struct sadb_comb *comb;
5430 const struct esp_algorithm *algo;
5431 struct mbuf *result = NULL, *m, *n;
5432 int encmin;
5433 int i, off, o;
5434 int totlen;
5435 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5436
5437 m = NULL;
5438 for (i = 1; i <= SADB_EALG_MAX; i++) {
5439 algo = esp_algorithm_lookup(i);
5440 if (!algo)
5441 continue;
5442
5443 if (algo->keymax < ipsec_esp_keymin)
5444 continue;
5445 if (algo->keymin < ipsec_esp_keymin)
5446 encmin = ipsec_esp_keymin;
5447 else
5448 encmin = algo->keymin;
5449
5450 if (ipsec_esp_auth)
5451 m = key_getcomb_ah();
5452 else {
5453 #ifdef DIAGNOSTIC
5454 if (l > MLEN)
5455 panic("assumption failed in key_getcomb_esp");
5456 #endif
5457 MGET(m, MB_DONTWAIT, MT_DATA);
5458 if (m) {
5459 M_ALIGN(m, l);
5460 m->m_len = l;
5461 m->m_next = NULL;
5462 bzero(mtod(m, caddr_t), m->m_len);
5463 }
5464 }
5465 if (!m)
5466 goto fail;
5467
5468 totlen = 0;
5469 for (n = m; n; n = n->m_next)
5470 totlen += n->m_len;
5471 #ifdef DIAGNOSTIC
5472 if (totlen % l)
5473 panic("assumption failed in key_getcomb_esp");
5474 #endif
5475
5476 for (off = 0; off < totlen; off += l) {
5477 n = m_pulldown(m, off, l, &o);
5478 if (!n) {
5479 /* m is already freed */
5480 goto fail;
5481 }
5482 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
5483 bzero(comb, sizeof(*comb));
5484 key_getcomb_setlifetime(comb);
5485 comb->sadb_comb_encrypt = i;
5486 comb->sadb_comb_encrypt_minbits = encmin;
5487 comb->sadb_comb_encrypt_maxbits = algo->keymax;
5488 }
5489
5490 if (!result)
5491 result = m;
5492 else
5493 m_cat(result, m);
5494 }
5495
5496 return result;
5497
5498 fail:
5499 if (result)
5500 m_freem(result);
5501 return NULL;
5502 }
5503 #endif
5504
5505 /*
5506 * XXX reorder combinations by preference
5507 */
5508 static struct mbuf *
5509 key_getcomb_ah(void)
5510 {
5511 struct sadb_comb *comb;
5512 const struct ah_algorithm *algo;
5513 struct mbuf *m;
5514 int min;
5515 int i;
5516 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5517
5518 m = NULL;
5519 for (i = 1; i <= SADB_AALG_MAX; i++) {
5520 #if 1
5521 /* we prefer HMAC algorithms, not old algorithms */
5522 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
5523 continue;
5524 #endif
5525 algo = ah_algorithm_lookup(i);
5526 if (!algo)
5527 continue;
5528
5529 if (algo->keymax < ipsec_ah_keymin)
5530 continue;
5531 if (algo->keymin < ipsec_ah_keymin)
5532 min = ipsec_ah_keymin;
5533 else
5534 min = algo->keymin;
5535
5536 if (!m) {
5537 #ifdef DIAGNOSTIC
5538 if (l > MLEN)
5539 panic("assumption failed in key_getcomb_ah");
5540 #endif
5541 MGET(m, MB_DONTWAIT, MT_DATA);
5542 if (m) {
5543 M_ALIGN(m, l);
5544 m->m_len = l;
5545 m->m_next = NULL;
5546 }
5547 } else
5548 M_PREPEND(m, l, MB_DONTWAIT);
5549 if (!m)
5550 return NULL;
5551
5552 comb = mtod(m, struct sadb_comb *);
5553 bzero(comb, sizeof(*comb));
5554 key_getcomb_setlifetime(comb);
5555 comb->sadb_comb_auth = i;
5556 comb->sadb_comb_auth_minbits = min;
5557 comb->sadb_comb_auth_maxbits = algo->keymax;
5558 }
5559
5560 return m;
5561 }
5562
5563 /*
5564 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
5565 * XXX reorder combinations by preference
5566 */
5567 static struct mbuf *
5568 key_getcomb_ipcomp(void)
5569 {
5570 struct sadb_comb *comb;
5571 const struct ipcomp_algorithm *algo;
5572 struct mbuf *m;
5573 int i;
5574 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5575
5576 m = NULL;
5577 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
5578 algo = ipcomp_algorithm_lookup(i);
5579 if (!algo)
5580 continue;
5581
5582 if (!m) {
5583 #ifdef DIAGNOSTIC
5584 if (l > MLEN)
5585 panic("assumption failed in key_getcomb_ipcomp");
5586 #endif
5587 MGET(m, MB_DONTWAIT, MT_DATA);
5588 if (m) {
5589 M_ALIGN(m, l);
5590 m->m_len = l;
5591 m->m_next = NULL;
5592 }
5593 } else
5594 M_PREPEND(m, l, MB_DONTWAIT);
5595 if (!m)
5596 return NULL;
5597
5598 comb = mtod(m, struct sadb_comb *);
5599 bzero(comb, sizeof(*comb));
5600 key_getcomb_setlifetime(comb);
5601 comb->sadb_comb_encrypt = i;
5602 /* what should we set into sadb_comb_*_{min,max}bits? */
5603 }
5604
5605 return m;
5606 }
5607
5608 /*
5609 * XXX no way to pass mode (transport/tunnel) to userland
5610 * XXX replay checking?
5611 * XXX sysctl interface to ipsec_{ah,esp}_keymin
5612 */
5613 static struct mbuf *
5614 key_getprop(const struct secasindex *saidx)
5615 {
5616 struct sadb_prop *prop;
5617 struct mbuf *m, *n;
5618 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
5619 int totlen;
5620
5621 switch (saidx->proto) {
5622 #ifdef IPSEC_ESP
5623 case IPPROTO_ESP:
5624 m = key_getcomb_esp();
5625 break;
5626 #endif
5627 case IPPROTO_AH:
5628 m = key_getcomb_ah();
5629 break;
5630 case IPPROTO_IPCOMP:
5631 m = key_getcomb_ipcomp();
5632 break;
5633 default:
5634 return NULL;
5635 }
5636
5637 if (!m)
5638 return NULL;
5639 M_PREPEND(m, l, MB_DONTWAIT);
5640 if (!m)
5641 return NULL;
5642
5643 totlen = 0;
5644 for (n = m; n; n = n->m_next)
5645 totlen += n->m_len;
5646
5647 prop = mtod(m, struct sadb_prop *);
5648 bzero(prop, sizeof(*prop));
5649 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
5650 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
5651 prop->sadb_prop_replay = 32; /* XXX */
5652
5653 return m;
5654 }
5655
5656 /*
5657 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
5658 * send
5659 * <base, SA, address(SD), (address(P)), x_policy,
5660 * (identity(SD),) (sensitivity,) proposal>
5661 * to KMD, and expect to receive
5662 * <base> with SADB_ACQUIRE if error occured,
5663 * or
5664 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
5665 * from KMD by PF_KEY.
5666 *
5667 * XXX x_policy is outside of RFC2367 (KAME extension).
5668 * XXX sensitivity is not supported.
5669 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
5670 * see comment for key_getcomb_ipcomp().
5671 *
5672 * OUT:
5673 * 0 : succeed
5674 * others: error number
5675 */
5676 static int
5677 key_acquire(struct secasindex *saidx, struct secpolicy *sp)
5678 {
5679 struct mbuf *result = NULL, *m;
5680 #ifndef IPSEC_NONBLOCK_ACQUIRE
5681 struct secacq *newacq;
5682 #endif
5683 u_int8_t satype;
5684 int error = -1;
5685 u_int32_t seq;
5686
5687 /* sanity check */
5688 if (saidx == NULL)
5689 panic("key_acquire: NULL pointer is passed.\n");
5690 if ((satype = key_proto2satype(saidx->proto)) == 0)
5691 panic("key_acquire: invalid proto is passed.\n");
5692
5693 #ifndef IPSEC_NONBLOCK_ACQUIRE
5694 /*
5695 * We never do anything about acquirng SA. There is anather
5696 * solution that kernel blocks to send SADB_ACQUIRE message until
5697 * getting something message from IKEd. In later case, to be
5698 * managed with ACQUIRING list.
5699 */
5700 /* get a entry to check whether sending message or not. */
5701 if ((newacq = key_getacq(saidx)) != NULL) {
5702 if (key_blockacq_count < newacq->count) {
5703 /* reset counter and do send message. */
5704 newacq->count = 0;
5705 } else {
5706 /* increment counter and do nothing. */
5707 newacq->count++;
5708 return 0;
5709 }
5710 } else {
5711 /* make new entry for blocking to send SADB_ACQUIRE. */
5712 if ((newacq = key_newacq(saidx)) == NULL)
5713 return ENOBUFS;
5714
5715 /* add to acqtree */
5716 LIST_INSERT_HEAD(&acqtree, newacq, chain);
5717 }
5718 #endif
5719
5720
5721 #ifndef IPSEC_NONBLOCK_ACQUIRE
5722 seq = newacq->seq;
5723 #else
5724 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
5725 #endif
5726 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
5727 if (!m) {
5728 error = ENOBUFS;
5729 goto fail;
5730 }
5731 result = m;
5732
5733 /* set sadb_address for saidx's. */
5734 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
5735 (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY);
5736 if (!m) {
5737 error = ENOBUFS;
5738 goto fail;
5739 }
5740 m_cat(result, m);
5741
5742 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
5743 (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY);
5744 if (!m) {
5745 error = ENOBUFS;
5746 goto fail;
5747 }
5748 m_cat(result, m);
5749
5750 /* XXX proxy address (optional) */
5751
5752 /* set sadb_x_policy */
5753 if (sp) {
5754 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
5755 if (!m) {
5756 error = ENOBUFS;
5757 goto fail;
5758 }
5759 m_cat(result, m);
5760 }
5761
5762 /* XXX identity (optional) */
5763 #if 0
5764 if (idexttype && fqdn) {
5765 /* create identity extension (FQDN) */
5766 struct sadb_ident *id;
5767 int fqdnlen;
5768
5769 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
5770 id = (struct sadb_ident *)p;
5771 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5772 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5773 id->sadb_ident_exttype = idexttype;
5774 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
5775 bcopy(fqdn, id + 1, fqdnlen);
5776 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
5777 }
5778
5779 if (idexttype) {
5780 /* create identity extension (USERFQDN) */
5781 struct sadb_ident *id;
5782 int userfqdnlen;
5783
5784 if (userfqdn) {
5785 /* +1 for terminating-NUL */
5786 userfqdnlen = strlen(userfqdn) + 1;
5787 } else
5788 userfqdnlen = 0;
5789 id = (struct sadb_ident *)p;
5790 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5791 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5792 id->sadb_ident_exttype = idexttype;
5793 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
5794 /* XXX is it correct? */
5795 if (curproc && curproc->p_cred)
5796 id->sadb_ident_id = curproc->p_cred->p_ruid;
5797 if (userfqdn && userfqdnlen)
5798 bcopy(userfqdn, id + 1, userfqdnlen);
5799 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
5800 }
5801 #endif
5802
5803 /* XXX sensitivity (optional) */
5804
5805 /* create proposal/combination extension */
5806 m = key_getprop(saidx);
5807 #if 0
5808 /*
5809 * spec conformant: always attach proposal/combination extension,
5810 * the problem is that we have no way to attach it for ipcomp,
5811 * due to the way sadb_comb is declared in RFC2367.
5812 */
5813 if (!m) {
5814 error = ENOBUFS;
5815 goto fail;
5816 }
5817 m_cat(result, m);
5818 #else
5819 /*
5820 * outside of spec; make proposal/combination extension optional.
5821 */
5822 if (m)
5823 m_cat(result, m);
5824 #endif
5825
5826 if ((result->m_flags & M_PKTHDR) == 0) {
5827 error = EINVAL;
5828 goto fail;
5829 }
5830
5831 if (result->m_len < sizeof(struct sadb_msg)) {
5832 result = m_pullup(result, sizeof(struct sadb_msg));
5833 if (result == NULL) {
5834 error = ENOBUFS;
5835 goto fail;
5836 }
5837 }
5838
5839 result->m_pkthdr.len = 0;
5840 for (m = result; m; m = m->m_next)
5841 result->m_pkthdr.len += m->m_len;
5842
5843 mtod(result, struct sadb_msg *)->sadb_msg_len =
5844 PFKEY_UNIT64(result->m_pkthdr.len);
5845
5846 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
5847
5848 fail:
5849 if (result)
5850 m_freem(result);
5851 return error;
5852 }
5853
5854 #ifndef IPSEC_NONBLOCK_ACQUIRE
5855 static struct secacq *
5856 key_newacq(struct secasindex *saidx)
5857 {
5858 struct secacq *newacq;
5859 struct timeval tv;
5860
5861 /* get new entry */
5862 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
5863 if (newacq == NULL) {
5864 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
5865 return NULL;
5866 }
5867 bzero(newacq, sizeof(*newacq));
5868
5869 /* copy secindex */
5870 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
5871 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
5872 microtime(&tv);
5873 newacq->created = tv.tv_sec;
5874 newacq->count = 0;
5875
5876 return newacq;
5877 }
5878
5879 static struct secacq *
5880 key_getacq(struct secasindex *saidx)
5881 {
5882 struct secacq *acq;
5883
5884 LIST_FOREACH(acq, &acqtree, chain) {
5885 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
5886 return acq;
5887 }
5888
5889 return NULL;
5890 }
5891
5892 static struct secacq *
5893 key_getacqbyseq(u_int32_t seq)
5894 {
5895 struct secacq *acq;
5896
5897 LIST_FOREACH(acq, &acqtree, chain) {
5898 if (acq->seq == seq)
5899 return acq;
5900 }
5901
5902 return NULL;
5903 }
5904 #endif
5905
5906 static struct secspacq *
5907 key_newspacq(struct secpolicyindex *spidx)
5908 {
5909 struct secspacq *acq;
5910 struct timeval tv;
5911
5912 /* get new entry */
5913 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
5914 if (acq == NULL) {
5915 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
5916 return NULL;
5917 }
5918 bzero(acq, sizeof(*acq));
5919
5920 /* copy secindex */
5921 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
5922 microtime(&tv);
5923 acq->created = tv.tv_sec;
5924 acq->count = 0;
5925
5926 return acq;
5927 }
5928
5929 static struct secspacq *
5930 key_getspacq(struct secpolicyindex *spidx)
5931 {
5932 struct secspacq *acq;
5933
5934 LIST_FOREACH(acq, &spacqtree, chain) {
5935 if (key_cmpspidx_exactly(spidx, &acq->spidx))
5936 return acq;
5937 }
5938
5939 return NULL;
5940 }
5941
5942 /*
5943 * SADB_ACQUIRE processing,
5944 * in first situation, is receiving
5945 * <base>
5946 * from the ikmpd, and clear sequence of its secasvar entry.
5947 *
5948 * In second situation, is receiving
5949 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5950 * from a user land process, and return
5951 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5952 * to the socket.
5953 *
5954 * m will always be freed.
5955 */
5956 static int
5957 key_acquire2(struct socket *so, struct mbuf *m,
5958 const struct sadb_msghdr *mhp)
5959 {
5960 struct sadb_address *src0, *dst0;
5961 struct secasindex saidx;
5962 struct secashead *sah;
5963 u_int16_t proto;
5964 int error;
5965
5966 /* sanity check */
5967 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5968 panic("key_acquire2: NULL pointer is passed.\n");
5969
5970 /*
5971 * Error message from KMd.
5972 * We assume that if error was occured in IKEd, the length of PFKEY
5973 * message is equal to the size of sadb_msg structure.
5974 * We do not raise error even if error occured in this function.
5975 */
5976 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
5977 #ifndef IPSEC_NONBLOCK_ACQUIRE
5978 struct secacq *acq;
5979 struct timeval tv;
5980
5981 /* check sequence number */
5982 if (mhp->msg->sadb_msg_seq == 0) {
5983 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
5984 m_freem(m);
5985 return 0;
5986 }
5987
5988 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
5989 /*
5990 * the specified larval SA is already gone, or we got
5991 * a bogus sequence number. we can silently ignore it.
5992 */
5993 m_freem(m);
5994 return 0;
5995 }
5996
5997 /* reset acq counter in order to deletion by timehander. */
5998 microtime(&tv);
5999 acq->created = tv.tv_sec;
6000 acq->count = 0;
6001 #endif
6002 m_freem(m);
6003 return 0;
6004 }
6005
6006 /*
6007 * This message is from user land.
6008 */
6009
6010 /* map satype to proto */
6011 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6012 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
6013 return key_senderror(so, m, EINVAL);
6014 }
6015
6016 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6017 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6018 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6019 /* error */
6020 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6021 return key_senderror(so, m, EINVAL);
6022 }
6023 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6024 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6025 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6026 /* error */
6027 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6028 return key_senderror(so, m, EINVAL);
6029 }
6030
6031 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6032 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6033
6034 /* XXX boundary check against sa_len */
6035 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6036
6037 /* get a SA index */
6038 LIST_FOREACH(sah, &sahtree, chain) {
6039 if (sah->state == SADB_SASTATE_DEAD)
6040 continue;
6041 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6042 break;
6043 }
6044 if (sah != NULL) {
6045 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
6046 return key_senderror(so, m, EEXIST);
6047 }
6048
6049 error = key_acquire(&saidx, NULL);
6050 if (error != 0) {
6051 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6052 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6053 return key_senderror(so, m, error);
6054 }
6055
6056 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6057 }
6058
6059 /*
6060 * SADB_REGISTER processing.
6061 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6062 * receive
6063 * <base>
6064 * from the ikmpd, and register a socket to send PF_KEY messages,
6065 * and send
6066 * <base, supported>
6067 * to KMD by PF_KEY.
6068 * If socket is detached, must free from regnode.
6069 *
6070 * m will always be freed.
6071 */
6072 static int
6073 key_register(struct socket *so, struct mbuf *m,
6074 const struct sadb_msghdr *mhp)
6075 {
6076 struct secreg *reg, *newreg = 0;
6077
6078 /* sanity check */
6079 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6080 panic("key_register: NULL pointer is passed.\n");
6081
6082 /* check for invalid register message */
6083 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
6084 return key_senderror(so, m, EINVAL);
6085
6086 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6087 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6088 goto setmsg;
6089
6090 /* check whether existing or not */
6091 LIST_FOREACH(reg, &regtree[mhp->msg->sadb_msg_satype], chain) {
6092 if (reg->so == so) {
6093 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6094 return key_senderror(so, m, EEXIST);
6095 }
6096 }
6097
6098 /* create regnode */
6099 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6100 if (newreg == NULL) {
6101 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6102 return key_senderror(so, m, ENOBUFS);
6103 }
6104 bzero((caddr_t)newreg, sizeof(*newreg));
6105
6106 newreg->so = so;
6107 ((struct keycb *)sotorawcb(so))->kp_registered++;
6108
6109 /* add regnode to regtree. */
6110 LIST_INSERT_HEAD(&regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6111
6112 setmsg:
6113 {
6114 struct mbuf *n;
6115 struct sadb_msg *newmsg;
6116 struct sadb_supported *sup;
6117 u_int len, alen, elen;
6118 int off;
6119 int i;
6120 struct sadb_alg *alg;
6121
6122 /* create new sadb_msg to reply. */
6123 alen = 0;
6124 for (i = 1; i <= SADB_AALG_MAX; i++) {
6125 if (ah_algorithm_lookup(i))
6126 alen += sizeof(struct sadb_alg);
6127 }
6128 if (alen)
6129 alen += sizeof(struct sadb_supported);
6130 elen = 0;
6131 #ifdef IPSEC_ESP
6132 for (i = 1; i <= SADB_EALG_MAX; i++) {
6133 if (esp_algorithm_lookup(i))
6134 elen += sizeof(struct sadb_alg);
6135 }
6136 if (elen)
6137 elen += sizeof(struct sadb_supported);
6138 #endif
6139
6140 len = sizeof(struct sadb_msg) + alen + elen;
6141
6142 if (len > MCLBYTES)
6143 return key_senderror(so, m, ENOBUFS);
6144
6145 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6146 if (len > MHLEN) {
6147 MCLGET(n, MB_DONTWAIT);
6148 if ((n->m_flags & M_EXT) == 0) {
6149 m_freem(n);
6150 n = NULL;
6151 }
6152 }
6153 if (!n)
6154 return key_senderror(so, m, ENOBUFS);
6155
6156 n->m_pkthdr.len = n->m_len = len;
6157 n->m_next = NULL;
6158 off = 0;
6159
6160 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6161 newmsg = mtod(n, struct sadb_msg *);
6162 newmsg->sadb_msg_errno = 0;
6163 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6164 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6165
6166 /* for authentication algorithm */
6167 if (alen) {
6168 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6169 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6170 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6171 off += PFKEY_ALIGN8(sizeof(*sup));
6172
6173 for (i = 1; i <= SADB_AALG_MAX; i++) {
6174 const struct ah_algorithm *aalgo;
6175
6176 aalgo = ah_algorithm_lookup(i);
6177 if (!aalgo)
6178 continue;
6179 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6180 alg->sadb_alg_id = i;
6181 alg->sadb_alg_ivlen = 0;
6182 alg->sadb_alg_minbits = aalgo->keymin;
6183 alg->sadb_alg_maxbits = aalgo->keymax;
6184 off += PFKEY_ALIGN8(sizeof(*alg));
6185 }
6186 }
6187
6188 #ifdef IPSEC_ESP
6189 /* for encryption algorithm */
6190 if (elen) {
6191 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6192 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6193 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6194 off += PFKEY_ALIGN8(sizeof(*sup));
6195
6196 for (i = 1; i <= SADB_EALG_MAX; i++) {
6197 const struct esp_algorithm *ealgo;
6198
6199 ealgo = esp_algorithm_lookup(i);
6200 if (!ealgo)
6201 continue;
6202 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6203 alg->sadb_alg_id = i;
6204 if (ealgo && ealgo->ivlen) {
6205 /*
6206 * give NULL to get the value preferred by
6207 * algorithm XXX SADB_X_EXT_DERIV ?
6208 */
6209 alg->sadb_alg_ivlen =
6210 (*ealgo->ivlen)(ealgo, NULL);
6211 } else
6212 alg->sadb_alg_ivlen = 0;
6213 alg->sadb_alg_minbits = ealgo->keymin;
6214 alg->sadb_alg_maxbits = ealgo->keymax;
6215 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6216 }
6217 }
6218 #endif
6219
6220 #ifdef DIGAGNOSTIC
6221 if (off != len)
6222 panic("length assumption failed in key_register");
6223 #endif
6224
6225 m_freem(m);
6226 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6227 }
6228 }
6229
6230 /*
6231 * free secreg entry registered.
6232 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6233 */
6234 void
6235 key_freereg(struct socket *so)
6236 {
6237 struct secreg *reg;
6238 int i;
6239
6240 /* sanity check */
6241 if (so == NULL)
6242 panic("key_freereg: NULL pointer is passed.\n");
6243
6244 /*
6245 * check whether existing or not.
6246 * check all type of SA, because there is a potential that
6247 * one socket is registered to multiple type of SA.
6248 */
6249 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6250 LIST_FOREACH(reg, &regtree[i], chain) {
6251 if (reg->so == so
6252 && __LIST_CHAINED(reg)) {
6253 LIST_REMOVE(reg, chain);
6254 KFREE(reg);
6255 break;
6256 }
6257 }
6258 }
6259
6260 return;
6261 }
6262
6263 /*
6264 * SADB_EXPIRE processing
6265 * send
6266 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6267 * to KMD by PF_KEY.
6268 * NOTE: We send only soft lifetime extension.
6269 *
6270 * OUT: 0 : succeed
6271 * others : error number
6272 */
6273 static int
6274 key_expire(struct secasvar *sav)
6275 {
6276 int satype;
6277 struct mbuf *result = NULL, *m;
6278 int len;
6279 int error = -1;
6280 struct sadb_lifetime *lt;
6281
6282 /* XXX: Why do we lock ? */
6283 crit_enter();
6284
6285 /* sanity check */
6286 if (sav == NULL)
6287 panic("key_expire: NULL pointer is passed.\n");
6288 if (sav->sah == NULL)
6289 panic("key_expire: Why was SA index in SA NULL.\n");
6290 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6291 panic("key_expire: invalid proto is passed.\n");
6292
6293 /* set msg header */
6294 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6295 if (!m) {
6296 error = ENOBUFS;
6297 goto fail;
6298 }
6299 result = m;
6300
6301 /* create SA extension */
6302 m = key_setsadbsa(sav);
6303 if (!m) {
6304 error = ENOBUFS;
6305 goto fail;
6306 }
6307 m_cat(result, m);
6308
6309 /* create SA extension */
6310 m = key_setsadbxsa2(sav->sah->saidx.mode,
6311 sav->replay ? sav->replay->count : 0,
6312 sav->sah->saidx.reqid);
6313 if (!m) {
6314 error = ENOBUFS;
6315 goto fail;
6316 }
6317 m_cat(result, m);
6318
6319 /* create lifetime extension (current and soft) */
6320 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6321 m = key_alloc_mbuf(len);
6322 if (!m || m->m_next) { /*XXX*/
6323 if (m)
6324 m_freem(m);
6325 error = ENOBUFS;
6326 goto fail;
6327 }
6328 bzero(mtod(m, caddr_t), len);
6329 lt = mtod(m, struct sadb_lifetime *);
6330 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6331 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6332 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6333 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6334 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6335 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6336 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6337 bcopy(sav->lft_s, lt, sizeof(*lt));
6338 m_cat(result, m);
6339
6340 /* set sadb_address for source */
6341 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6342 (struct sockaddr *)&sav->sah->saidx.src,
6343 FULLMASK, IPSEC_ULPROTO_ANY);
6344 if (!m) {
6345 error = ENOBUFS;
6346 goto fail;
6347 }
6348 m_cat(result, m);
6349
6350 /* set sadb_address for destination */
6351 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6352 (struct sockaddr *)&sav->sah->saidx.dst,
6353 FULLMASK, IPSEC_ULPROTO_ANY);
6354 if (!m) {
6355 error = ENOBUFS;
6356 goto fail;
6357 }
6358 m_cat(result, m);
6359
6360 if ((result->m_flags & M_PKTHDR) == 0) {
6361 error = EINVAL;
6362 goto fail;
6363 }
6364
6365 if (result->m_len < sizeof(struct sadb_msg)) {
6366 result = m_pullup(result, sizeof(struct sadb_msg));
6367 if (result == NULL) {
6368 error = ENOBUFS;
6369 goto fail;
6370 }
6371 }
6372
6373 result->m_pkthdr.len = 0;
6374 for (m = result; m; m = m->m_next)
6375 result->m_pkthdr.len += m->m_len;
6376
6377 mtod(result, struct sadb_msg *)->sadb_msg_len =
6378 PFKEY_UNIT64(result->m_pkthdr.len);
6379
6380 crit_exit();
6381 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6382
6383 fail:
6384 if (result)
6385 m_freem(result);
6386 crit_exit();
6387 return error;
6388 }
6389
6390 /*
6391 * SADB_FLUSH processing
6392 * receive
6393 * <base>
6394 * from the ikmpd, and free all entries in secastree.
6395 * and send,
6396 * <base>
6397 * to the ikmpd.
6398 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6399 *
6400 * m will always be freed.
6401 */
6402 static int
6403 key_flush(struct socket *so, struct mbuf *m,
6404 const struct sadb_msghdr *mhp)
6405 {
6406 struct sadb_msg *newmsg;
6407 struct secashead *sah, *nextsah;
6408 struct secasvar *sav, *nextsav;
6409 u_int16_t proto;
6410 u_int8_t state;
6411 u_int stateidx;
6412
6413 /* sanity check */
6414 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6415 panic("key_flush: NULL pointer is passed.\n");
6416
6417 /* map satype to proto */
6418 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6419 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6420 return key_senderror(so, m, EINVAL);
6421 }
6422
6423 /* no SATYPE specified, i.e. flushing all SA. */
6424 for (sah = LIST_FIRST(&sahtree);
6425 sah != NULL;
6426 sah = nextsah) {
6427 nextsah = LIST_NEXT(sah, chain);
6428
6429 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6430 && proto != sah->saidx.proto)
6431 continue;
6432
6433 for (stateidx = 0;
6434 stateidx < _ARRAYLEN(saorder_state_alive);
6435 stateidx++) {
6436 state = saorder_state_any[stateidx];
6437 for (sav = LIST_FIRST(&sah->savtree[state]);
6438 sav != NULL;
6439 sav = nextsav) {
6440
6441 nextsav = LIST_NEXT(sav, chain);
6442
6443 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6444 key_freesav(sav);
6445 }
6446 }
6447
6448 sah->state = SADB_SASTATE_DEAD;
6449 }
6450
6451 if (m->m_len < sizeof(struct sadb_msg) ||
6452 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6453 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6454 return key_senderror(so, m, ENOBUFS);
6455 }
6456
6457 if (m->m_next)
6458 m_freem(m->m_next);
6459 m->m_next = NULL;
6460 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6461 newmsg = mtod(m, struct sadb_msg *);
6462 newmsg->sadb_msg_errno = 0;
6463 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6464
6465 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6466 }
6467
6468 /*
6469 * SADB_DUMP processing
6470 * dump all entries including status of DEAD in SAD.
6471 * receive
6472 * <base>
6473 * from the ikmpd, and dump all secasvar leaves
6474 * and send,
6475 * <base> .....
6476 * to the ikmpd.
6477 *
6478 * m will always be freed.
6479 */
6480 static int
6481 key_dump(struct socket *so, struct mbuf *m,
6482 const struct sadb_msghdr *mhp)
6483 {
6484 struct secashead *sah;
6485 struct secasvar *sav;
6486 u_int16_t proto;
6487 u_int stateidx;
6488 u_int8_t satype;
6489 u_int8_t state;
6490 int cnt;
6491 struct sadb_msg *newmsg;
6492 struct mbuf *n;
6493
6494 /* sanity check */
6495 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6496 panic("key_dump: NULL pointer is passed.\n");
6497
6498 /* map satype to proto */
6499 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6500 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
6501 return key_senderror(so, m, EINVAL);
6502 }
6503
6504 /* count sav entries to be sent to the userland. */
6505 cnt = 0;
6506 LIST_FOREACH(sah, &sahtree, chain) {
6507 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6508 && proto != sah->saidx.proto)
6509 continue;
6510
6511 for (stateidx = 0;
6512 stateidx < _ARRAYLEN(saorder_state_any);
6513 stateidx++) {
6514 state = saorder_state_any[stateidx];
6515 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6516 cnt++;
6517 }
6518 }
6519 }
6520
6521 if (cnt == 0)
6522 return key_senderror(so, m, ENOENT);
6523
6524 /* send this to the userland, one at a time. */
6525 newmsg = NULL;
6526 LIST_FOREACH(sah, &sahtree, chain) {
6527 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6528 && proto != sah->saidx.proto)
6529 continue;
6530
6531 /* map proto to satype */
6532 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6533 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
6534 return key_senderror(so, m, EINVAL);
6535 }
6536
6537 for (stateidx = 0;
6538 stateidx < _ARRAYLEN(saorder_state_any);
6539 stateidx++) {
6540 state = saorder_state_any[stateidx];
6541 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6542 n = key_setdumpsa(sav, SADB_DUMP, satype,
6543 --cnt, mhp->msg->sadb_msg_pid);
6544 if (!n)
6545 return key_senderror(so, m, ENOBUFS);
6546
6547 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6548 }
6549 }
6550 }
6551
6552 m_freem(m);
6553 return 0;
6554 }
6555
6556 /*
6557 * SADB_X_PROMISC processing
6558 *
6559 * m will always be freed.
6560 */
6561 static int
6562 key_promisc(struct socket *so, struct mbuf *m,
6563 const struct sadb_msghdr *mhp)
6564 {
6565 int olen;
6566
6567 /* sanity check */
6568 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6569 panic("key_promisc: NULL pointer is passed.\n");
6570
6571 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6572
6573 if (olen < sizeof(struct sadb_msg)) {
6574 #if 1
6575 return key_senderror(so, m, EINVAL);
6576 #else
6577 m_freem(m);
6578 return 0;
6579 #endif
6580 } else if (olen == sizeof(struct sadb_msg)) {
6581 /* enable/disable promisc mode */
6582 struct keycb *kp;
6583
6584 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
6585 return key_senderror(so, m, EINVAL);
6586 mhp->msg->sadb_msg_errno = 0;
6587 switch (mhp->msg->sadb_msg_satype) {
6588 case 0:
6589 case 1:
6590 kp->kp_promisc = mhp->msg->sadb_msg_satype;
6591 break;
6592 default:
6593 return key_senderror(so, m, EINVAL);
6594 }
6595
6596 /* send the original message back to everyone */
6597 mhp->msg->sadb_msg_errno = 0;
6598 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6599 } else {
6600 /* send packet as is */
6601
6602 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
6603
6604 /* TODO: if sadb_msg_seq is specified, send to specific pid */
6605 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6606 }
6607 }
6608
6609 static int (*key_typesw[]) (struct socket *, struct mbuf *,
6610 const struct sadb_msghdr *) = {
6611 NULL, /* SADB_RESERVED */
6612 key_getspi, /* SADB_GETSPI */
6613 key_update, /* SADB_UPDATE */
6614 key_add, /* SADB_ADD */
6615 key_delete, /* SADB_DELETE */
6616 key_get, /* SADB_GET */
6617 key_acquire2, /* SADB_ACQUIRE */
6618 key_register, /* SADB_REGISTER */
6619 NULL, /* SADB_EXPIRE */
6620 key_flush, /* SADB_FLUSH */
6621 key_dump, /* SADB_DUMP */
6622 key_promisc, /* SADB_X_PROMISC */
6623 NULL, /* SADB_X_PCHANGE */
6624 key_spdadd, /* SADB_X_SPDUPDATE */
6625 key_spdadd, /* SADB_X_SPDADD */
6626 key_spddelete, /* SADB_X_SPDDELETE */
6627 key_spdget, /* SADB_X_SPDGET */
6628 NULL, /* SADB_X_SPDACQUIRE */
6629 key_spddump, /* SADB_X_SPDDUMP */
6630 key_spdflush, /* SADB_X_SPDFLUSH */
6631 key_spdadd, /* SADB_X_SPDSETIDX */
6632 NULL, /* SADB_X_SPDEXPIRE */
6633 key_spddelete2, /* SADB_X_SPDDELETE2 */
6634 };
6635
6636 /*
6637 * parse sadb_msg buffer to process PFKEYv2,
6638 * and create a data to response if needed.
6639 * I think to be dealed with mbuf directly.
6640 * IN:
6641 * msgp : pointer to pointer to a received buffer pulluped.
6642 * This is rewrited to response.
6643 * so : pointer to socket.
6644 * OUT:
6645 * length for buffer to send to user process.
6646 */
6647 int
6648 key_parse(struct mbuf *m, struct socket *so)
6649 {
6650 struct sadb_msg *msg;
6651 struct sadb_msghdr mh;
6652 u_int orglen;
6653 int error;
6654 int target;
6655
6656 /* sanity check */
6657 if (m == NULL || so == NULL)
6658 panic("key_parse: NULL pointer is passed.\n");
6659
6660 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
6661 KEYDEBUG(KEYDEBUG_KEY_DUMP,
6662 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
6663 kdebug_sadb(msg));
6664 #endif
6665
6666 if (m->m_len < sizeof(struct sadb_msg)) {
6667 m = m_pullup(m, sizeof(struct sadb_msg));
6668 if (!m)
6669 return ENOBUFS;
6670 }
6671 msg = mtod(m, struct sadb_msg *);
6672 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
6673 target = KEY_SENDUP_ONE;
6674
6675 if ((m->m_flags & M_PKTHDR) == 0 ||
6676 m->m_pkthdr.len != m->m_pkthdr.len) {
6677 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
6678 pfkeystat.out_invlen++;
6679 error = EINVAL;
6680 goto senderror;
6681 }
6682
6683 if (msg->sadb_msg_version != PF_KEY_V2) {
6684 ipseclog((LOG_DEBUG,
6685 "key_parse: PF_KEY version %u is mismatched.\n",
6686 msg->sadb_msg_version));
6687 pfkeystat.out_invver++;
6688 error = EINVAL;
6689 goto senderror;
6690 }
6691
6692 if (msg->sadb_msg_type > SADB_MAX) {
6693 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6694 msg->sadb_msg_type));
6695 pfkeystat.out_invmsgtype++;
6696 error = EINVAL;
6697 goto senderror;
6698 }
6699
6700 /* for old-fashioned code - should be nuked */
6701 if (m->m_pkthdr.len > MCLBYTES) {
6702 m_freem(m);
6703 return ENOBUFS;
6704 }
6705 if (m->m_next) {
6706 struct mbuf *n;
6707
6708 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6709 if (n && m->m_pkthdr.len > MHLEN) {
6710 MCLGET(n, MB_DONTWAIT);
6711 if ((n->m_flags & M_EXT) == 0) {
6712 m_free(n);
6713 n = NULL;
6714 }
6715 }
6716 if (!n) {
6717 m_freem(m);
6718 return ENOBUFS;
6719 }
6720 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
6721 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
6722 n->m_next = NULL;
6723 m_freem(m);
6724 m = n;
6725 }
6726
6727 /* align the mbuf chain so that extensions are in contiguous region. */
6728 error = key_align(m, &mh);
6729 if (error)
6730 return error;
6731
6732 if (m->m_next) { /*XXX*/
6733 m_freem(m);
6734 return ENOBUFS;
6735 }
6736
6737 msg = mh.msg;
6738
6739 /* check SA type */
6740 switch (msg->sadb_msg_satype) {
6741 case SADB_SATYPE_UNSPEC:
6742 switch (msg->sadb_msg_type) {
6743 case SADB_GETSPI:
6744 case SADB_UPDATE:
6745 case SADB_ADD:
6746 case SADB_DELETE:
6747 case SADB_GET:
6748 case SADB_ACQUIRE:
6749 case SADB_EXPIRE:
6750 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
6751 "when msg type=%u.\n", msg->sadb_msg_type));
6752 pfkeystat.out_invsatype++;
6753 error = EINVAL;
6754 goto senderror;
6755 }
6756 break;
6757 case SADB_SATYPE_AH:
6758 case SADB_SATYPE_ESP:
6759 case SADB_X_SATYPE_IPCOMP:
6760 switch (msg->sadb_msg_type) {
6761 case SADB_X_SPDADD:
6762 case SADB_X_SPDDELETE:
6763 case SADB_X_SPDGET:
6764 case SADB_X_SPDDUMP:
6765 case SADB_X_SPDFLUSH:
6766 case SADB_X_SPDSETIDX:
6767 case SADB_X_SPDUPDATE:
6768 case SADB_X_SPDDELETE2:
6769 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
6770 msg->sadb_msg_type));
6771 pfkeystat.out_invsatype++;
6772 error = EINVAL;
6773 goto senderror;
6774 }
6775 break;
6776 case SADB_SATYPE_RSVP:
6777 case SADB_SATYPE_OSPFV2:
6778 case SADB_SATYPE_RIPV2:
6779 case SADB_SATYPE_MIP:
6780 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
6781 msg->sadb_msg_satype));
6782 pfkeystat.out_invsatype++;
6783 error = EOPNOTSUPP;
6784 goto senderror;
6785 case 1: /* XXX: What does it do? */
6786 if (msg->sadb_msg_type == SADB_X_PROMISC)
6787 break;
6788 /*FALLTHROUGH*/
6789 default:
6790 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6791 msg->sadb_msg_satype));
6792 pfkeystat.out_invsatype++;
6793 error = EINVAL;
6794 goto senderror;
6795 }
6796
6797 /* check field of upper layer protocol and address family */
6798 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
6799 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
6800 struct sadb_address *src0, *dst0;
6801 u_int plen;
6802
6803 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
6804 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
6805
6806 /* check upper layer protocol */
6807 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
6808 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
6809 pfkeystat.out_invaddr++;
6810 error = EINVAL;
6811 goto senderror;
6812 }
6813
6814 /* check family */
6815 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
6816 PFKEY_ADDR_SADDR(dst0)->sa_family) {
6817 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
6818 pfkeystat.out_invaddr++;
6819 error = EINVAL;
6820 goto senderror;
6821 }
6822 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6823 PFKEY_ADDR_SADDR(dst0)->sa_len) {
6824 ipseclog((LOG_DEBUG,
6825 "key_parse: address struct size mismatched.\n"));
6826 pfkeystat.out_invaddr++;
6827 error = EINVAL;
6828 goto senderror;
6829 }
6830
6831 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6832 case AF_INET:
6833 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6834 sizeof(struct sockaddr_in)) {
6835 pfkeystat.out_invaddr++;
6836 error = EINVAL;
6837 goto senderror;
6838 }
6839 break;
6840 case AF_INET6:
6841 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6842 sizeof(struct sockaddr_in6)) {
6843 pfkeystat.out_invaddr++;
6844 error = EINVAL;
6845 goto senderror;
6846 }
6847 break;
6848 default:
6849 ipseclog((LOG_DEBUG,
6850 "key_parse: unsupported address family.\n"));
6851 pfkeystat.out_invaddr++;
6852 error = EAFNOSUPPORT;
6853 goto senderror;
6854 }
6855
6856 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6857 case AF_INET:
6858 plen = sizeof(struct in_addr) << 3;
6859 break;
6860 case AF_INET6:
6861 plen = sizeof(struct in6_addr) << 3;
6862 break;
6863 default:
6864 plen = 0; /*fool gcc*/
6865 break;
6866 }
6867
6868 /* check max prefix length */
6869 if (src0->sadb_address_prefixlen > plen ||
6870 dst0->sadb_address_prefixlen > plen) {
6871 ipseclog((LOG_DEBUG,
6872 "key_parse: illegal prefixlen.\n"));
6873 pfkeystat.out_invaddr++;
6874 error = EINVAL;
6875 goto senderror;
6876 }
6877
6878 /*
6879 * prefixlen == 0 is valid because there can be a case when
6880 * all addresses are matched.
6881 */
6882 }
6883
6884 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
6885 key_typesw[msg->sadb_msg_type] == NULL) {
6886 pfkeystat.out_invmsgtype++;
6887 error = EINVAL;
6888 goto senderror;
6889 }
6890
6891 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
6892
6893 senderror:
6894 msg->sadb_msg_errno = error;
6895 return key_sendup_mbuf(so, m, target);
6896 }
6897
6898 static int
6899 key_senderror(struct socket *so, struct mbuf *m, int code)
6900 {
6901 struct sadb_msg *msg;
6902
6903 if (m->m_len < sizeof(struct sadb_msg))
6904 panic("invalid mbuf passed to key_senderror");
6905
6906 msg = mtod(m, struct sadb_msg *);
6907 msg->sadb_msg_errno = code;
6908 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6909 }
6910
6911 /*
6912 * set the pointer to each header into message buffer.
6913 * m will be freed on error.
6914 * XXX larger-than-MCLBYTES extension?
6915 */
6916 static int
6917 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
6918 {
6919 struct mbuf *n;
6920 struct sadb_ext *ext;
6921 size_t off, end;
6922 int extlen;
6923 int toff;
6924
6925 /* sanity check */
6926 if (m == NULL || mhp == NULL)
6927 panic("key_align: NULL pointer is passed.\n");
6928 if (m->m_len < sizeof(struct sadb_msg))
6929 panic("invalid mbuf passed to key_align");
6930
6931 /* initialize */
6932 bzero(mhp, sizeof(*mhp));
6933
6934 mhp->msg = mtod(m, struct sadb_msg *);
6935 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
6936
6937 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6938 extlen = end; /*just in case extlen is not updated*/
6939 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
6940 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
6941 if (!n) {
6942 /* m is already freed */
6943 return ENOBUFS;
6944 }
6945 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6946
6947 /* set pointer */
6948 switch (ext->sadb_ext_type) {
6949 case SADB_EXT_SA:
6950 case SADB_EXT_ADDRESS_SRC:
6951 case SADB_EXT_ADDRESS_DST:
6952 case SADB_EXT_ADDRESS_PROXY:
6953 case SADB_EXT_LIFETIME_CURRENT:
6954 case SADB_EXT_LIFETIME_HARD:
6955 case SADB_EXT_LIFETIME_SOFT:
6956 case SADB_EXT_KEY_AUTH:
6957 case SADB_EXT_KEY_ENCRYPT:
6958 case SADB_EXT_IDENTITY_SRC:
6959 case SADB_EXT_IDENTITY_DST:
6960 case SADB_EXT_SENSITIVITY:
6961 case SADB_EXT_PROPOSAL:
6962 case SADB_EXT_SUPPORTED_AUTH:
6963 case SADB_EXT_SUPPORTED_ENCRYPT:
6964 case SADB_EXT_SPIRANGE:
6965 case SADB_X_EXT_POLICY:
6966 case SADB_X_EXT_SA2:
6967 /* duplicate check */
6968 /*
6969 * XXX Are there duplication payloads of either
6970 * KEY_AUTH or KEY_ENCRYPT ?
6971 */
6972 if (mhp->ext[ext->sadb_ext_type] != NULL) {
6973 ipseclog((LOG_DEBUG,
6974 "key_align: duplicate ext_type %u "
6975 "is passed.\n", ext->sadb_ext_type));
6976 m_freem(m);
6977 pfkeystat.out_dupext++;
6978 return EINVAL;
6979 }
6980 break;
6981 default:
6982 ipseclog((LOG_DEBUG,
6983 "key_align: invalid ext_type %u is passed.\n",
6984 ext->sadb_ext_type));
6985 m_freem(m);
6986 pfkeystat.out_invexttype++;
6987 return EINVAL;
6988 }
6989
6990 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
6991
6992 if (key_validate_ext(ext, extlen)) {
6993 m_freem(m);
6994 pfkeystat.out_invlen++;
6995 return EINVAL;
6996 }
6997
6998 n = m_pulldown(m, off, extlen, &toff);
6999 if (!n) {
7000 /* m is already freed */
7001 return ENOBUFS;
7002 }
7003 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7004
7005 mhp->ext[ext->sadb_ext_type] = ext;
7006 mhp->extoff[ext->sadb_ext_type] = off;
7007 mhp->extlen[ext->sadb_ext_type] = extlen;
7008 }
7009
7010 if (off != end) {
7011 m_freem(m);
7012 pfkeystat.out_invlen++;
7013 return EINVAL;
7014 }
7015
7016 return 0;
7017 }
7018
7019 static int
7020 key_validate_ext(const struct sadb_ext *ext, int len)
7021 {
7022 const struct sockaddr *sa;
7023 enum { NONE, ADDR } checktype = NONE;
7024 int baselen = 0;
7025 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7026
7027 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7028 return EINVAL;
7029
7030 /* if it does not match minimum/maximum length, bail */
7031 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
7032 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
7033 return EINVAL;
7034 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7035 return EINVAL;
7036 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7037 return EINVAL;
7038
7039 /* more checks based on sadb_ext_type XXX need more */
7040 switch (ext->sadb_ext_type) {
7041 case SADB_EXT_ADDRESS_SRC:
7042 case SADB_EXT_ADDRESS_DST:
7043 case SADB_EXT_ADDRESS_PROXY:
7044 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7045 checktype = ADDR;
7046 break;
7047 case SADB_EXT_IDENTITY_SRC:
7048 case SADB_EXT_IDENTITY_DST:
7049 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7050 SADB_X_IDENTTYPE_ADDR) {
7051 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7052 checktype = ADDR;
7053 } else
7054 checktype = NONE;
7055 break;
7056 default:
7057 checktype = NONE;
7058 break;
7059 }
7060
7061 switch (checktype) {
7062 case NONE:
7063 break;
7064 case ADDR:
7065 sa = (const struct sockaddr *)((c_caddr_t)ext + baselen);
7066 if (len < baselen + sal)
7067 return EINVAL;
7068 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7069 return EINVAL;
7070 break;
7071 }
7072
7073 return 0;
7074 }
7075
7076 void
7077 key_init(void)
7078 {
7079 int i;
7080
7081 bzero((caddr_t)&key_cb, sizeof(key_cb));
7082
7083 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7084 LIST_INIT(&sptree[i]);
7085 }
7086
7087 LIST_INIT(&sahtree);
7088
7089 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7090 LIST_INIT(&regtree[i]);
7091 }
7092
7093 #ifndef IPSEC_NONBLOCK_ACQUIRE
7094 LIST_INIT(&acqtree);
7095 #endif
7096 LIST_INIT(&spacqtree);
7097
7098 /* system default */
7099 #ifdef INET
7100 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7101 ip4_def_policy.refcnt++; /*never reclaim this*/
7102 #endif
7103 #ifdef INET6
7104 ip6_def_policy.policy = IPSEC_POLICY_NONE;
7105 ip6_def_policy.refcnt++; /*never reclaim this*/
7106 #endif
7107
7108 #ifndef IPSEC_DEBUG2
7109 callout_init(&key_timehandler_ch);
7110 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
7111 #endif /*IPSEC_DEBUG2*/
7112
7113 /* initialize key statistics */
7114 keystat.getspi_count = 1;
7115
7116 kprintf("IPsec: Initialized Security Association Processing.\n");
7117
7118 return;
7119 }
7120
7121 /*
7122 * XXX: maybe This function is called after INBOUND IPsec processing.
7123 *
7124 * Special check for tunnel-mode packets.
7125 * We must make some checks for consistency between inner and outer IP header.
7126 *
7127 * xxx more checks to be provided
7128 */
7129 int
7130 key_checktunnelsanity(struct secasvar *sav, u_int family,
7131 caddr_t src, caddr_t dst)
7132 {
7133 /* sanity check */
7134 if (sav->sah == NULL)
7135 panic("sav->sah == NULL at key_checktunnelsanity");
7136
7137 /* XXX: check inner IP header */
7138
7139 return 1;
7140 }
7141
7142 #if 0
7143 #define hostnamelen strlen(hostname)
7144
7145 /*
7146 * Get FQDN for the host.
7147 * If the administrator configured hostname (by hostname(1)) without
7148 * domain name, returns nothing.
7149 */
7150 static const char *
7151 key_getfqdn(void)
7152 {
7153 int i;
7154 int hasdot;
7155 static char fqdn[MAXHOSTNAMELEN + 1];
7156
7157 if (!hostnamelen)
7158 return NULL;
7159
7160 /* check if it comes with domain name. */
7161 hasdot = 0;
7162 for (i = 0; i < hostnamelen; i++) {
7163 if (hostname[i] == '.')
7164 hasdot++;
7165 }
7166 if (!hasdot)
7167 return NULL;
7168
7169 /* NOTE: hostname may not be NUL-terminated. */
7170 bzero(fqdn, sizeof(fqdn));
7171 bcopy(hostname, fqdn, hostnamelen);
7172 fqdn[hostnamelen] = '\0';
7173 return fqdn;
7174 }
7175
7176 /*
7177 * get username@FQDN for the host/user.
7178 */
7179 static const char *
7180 key_getuserfqdn(void)
7181 {
7182 const char *host;
7183 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7184 struct proc *p = curproc;
7185 char *q;
7186
7187 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7188 return NULL;
7189 if (!(host = key_getfqdn()))
7190 return NULL;
7191
7192 /* NOTE: s_login may not be-NUL terminated. */
7193 bzero(userfqdn, sizeof(userfqdn));
7194 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
7195 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7196 q = userfqdn + strlen(userfqdn);
7197 *q++ = '@';
7198 bcopy(host, q, strlen(host));
7199 q += strlen(host);
7200 *q++ = '\0';
7201
7202 return userfqdn;
7203 }
7204 #endif
7205
7206 /* record data transfer on SA, and update timestamps */
7207 void
7208 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
7209 {
7210 if (!sav)
7211 panic("key_sa_recordxfer called with sav == NULL");
7212 if (!m)
7213 panic("key_sa_recordxfer called with m == NULL");
7214 if (!sav->lft_c)
7215 return;
7216
7217 /*
7218 * XXX Currently, there is a difference of bytes size
7219 * between inbound and outbound processing.
7220 */
7221 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7222 /* to check bytes lifetime is done in key_timehandler(). */
7223
7224 /*
7225 * We use the number of packets as the unit of
7226 * sadb_lifetime_allocations. We increment the variable
7227 * whenever {esp,ah}_{in,out}put is called.
7228 */
7229 sav->lft_c->sadb_lifetime_allocations++;
7230 /* XXX check for expires? */
7231
7232 /*
7233 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7234 * in seconds. HARD and SOFT lifetime are measured by the time
7235 * difference (again in seconds) from sadb_lifetime_usetime.
7236 *
7237 * usetime
7238 * v expire expire
7239 * -----+-----+--------+---> t
7240 * <--------------> HARD
7241 * <-----> SOFT
7242 */
7243 {
7244 struct timeval tv;
7245 microtime(&tv);
7246 sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
7247 /* XXX check for expires? */
7248 }
7249
7250 return;
7251 }
7252
7253 /* dumb version */
7254 void
7255 key_sa_routechange(struct sockaddr *dst)
7256 {
7257 struct secashead *sah;
7258 struct route *ro;
7259
7260 LIST_FOREACH(sah, &sahtree, chain) {
7261 ro = &sah->sa_route;
7262 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7263 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7264 RTFREE(ro->ro_rt);
7265 ro->ro_rt = (struct rtentry *)NULL;
7266 }
7267 }
7268
7269 return;
7270 }
7271
7272 static void
7273 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7274 {
7275 if (sav == NULL)
7276 panic("key_sa_chgstate called with sav == NULL");
7277
7278 if (sav->state == state)
7279 return;
7280
7281 if (__LIST_CHAINED(sav))
7282 LIST_REMOVE(sav, chain);
7283
7284 sav->state = state;
7285 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7286 }
7287
7288 void
7289 key_sa_stir_iv(struct secasvar *sav)
7290 {
7291
7292 if (!sav->iv)
7293 panic("key_sa_stir_iv called with sav == NULL");
7294 key_randomfill(sav->iv, sav->ivlen);
7295 }
7296
7297 /* XXX too much? */
7298 static struct mbuf *
7299 key_alloc_mbuf(int l)
7300 {
7301 struct mbuf *m = NULL, *n;
7302 int len, t;
7303
7304 len = l;
7305 while (len > 0) {
7306 MGET(n, MB_DONTWAIT, MT_DATA);
7307 if (n && len > MLEN)
7308 MCLGET(n, MB_DONTWAIT);
7309 if (!n) {
7310 m_freem(m);
7311 return NULL;
7312 }
7313
7314 n->m_next = NULL;
7315 n->m_len = 0;
7316 n->m_len = M_TRAILINGSPACE(n);
7317 /* use the bottom of mbuf, hoping we can prepend afterwards */
7318 if (n->m_len > len) {
7319 t = (n->m_len - len) & ~(sizeof(long) - 1);
7320 n->m_data += t;
7321 n->m_len = len;
7322 }
7323
7324 len -= n->m_len;
7325
7326 if (m)
7327 m_cat(m, n);
7328 else
7329 m = n;
7330 }
7331
7332 return m;
7333 }
DragonFly BSD