key.c revision 1.7
1 /* $NetBSD: key.c,v 1.7 2004/02/24 15:12:52 wiz Exp $ */ 2 /* $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/netipsec/key.c,v 1.3.2.2 2003/07/01 01:38:13 sam 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 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.7 2004/02/24 15:12:52 wiz Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 67 #include <net/if.h> 68 #include <net/route.h> 69 #include <net/raw_cb.h> 70 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/in_var.h> 75 #ifdef INET 76 #include <netinet/ip_var.h> 77 #endif 78 79 #ifdef INET6 80 #include <netinet/ip6.h> 81 #include <netinet6/in6_var.h> 82 #include <netinet6/ip6_var.h> 83 #endif /* INET6 */ 84 85 #ifdef INET 86 #include <netinet/in_pcb.h> 87 #endif 88 #ifdef INET6 89 #include <netinet6/in6_pcb.h> 90 #endif /* INET6 */ 91 92 #include <net/pfkeyv2.h> 93 #include <netipsec/keydb.h> 94 #include <netipsec/key.h> 95 #include <netipsec/keysock.h> 96 #include <netipsec/key_debug.h> 97 98 #include <netipsec/ipsec.h> 99 #ifdef INET6 100 #include <netipsec/ipsec6.h> 101 #endif 102 103 #include <netipsec/xform.h> 104 #include <netipsec/ipsec_osdep.h> 105 106 #include <machine/stdarg.h> 107 108 109 #include <net/net_osdep.h> 110 111 #define FULLMASK 0xff 112 #define _BITS(bytes) ((bytes) << 3) 113 114 /* 115 * Note on SA reference counting: 116 * - SAs that are not in DEAD state will have (total external reference + 1) 117 * following value in reference count field. they cannot be freed and are 118 * referenced from SA header. 119 * - SAs that are in DEAD state will have (total external reference) 120 * in reference count field. they are ready to be freed. reference from 121 * SA header will be removed in key_delsav(), when the reference count 122 * field hits 0 (= no external reference other than from SA header. 123 */ 124 125 u_int32_t key_debug_level = 0; 126 static u_int key_spi_trycnt = 1000; 127 static u_int32_t key_spi_minval = 0x100; 128 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 129 static u_int32_t policy_id = 0; 130 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 131 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 132 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 133 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 134 static int key_prefered_oldsa = 1; /* prefered old sa rather than new sa.*/ 135 136 static u_int32_t acq_seq = 0; 137 static int key_tick_init_random = 0; 138 139 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 140 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 141 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 142 /* registed list */ 143 #ifndef IPSEC_NONBLOCK_ACQUIRE 144 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 145 #endif 146 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 147 148 /* search order for SAs */ 149 static u_int saorder_state_valid[] = { 150 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 151 /* 152 * This order is important because we must select the oldest SA 153 * for outbound processing. For inbound, This is not important. 154 */ 155 }; 156 static u_int saorder_state_alive[] = { 157 /* except DEAD */ 158 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 159 }; 160 static u_int saorder_state_any[] = { 161 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 162 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 163 }; 164 165 static const int minsize[] = { 166 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 167 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 168 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 169 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 170 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 171 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 172 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 173 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 174 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 175 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 176 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 177 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 178 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 179 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 180 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 181 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 182 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 183 0, /* SADB_X_EXT_KMPRIVATE */ 184 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 185 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 186 }; 187 static const int maxsize[] = { 188 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 189 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 190 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 191 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 192 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 193 0, /* SADB_EXT_ADDRESS_SRC */ 194 0, /* SADB_EXT_ADDRESS_DST */ 195 0, /* SADB_EXT_ADDRESS_PROXY */ 196 0, /* SADB_EXT_KEY_AUTH */ 197 0, /* SADB_EXT_KEY_ENCRYPT */ 198 0, /* SADB_EXT_IDENTITY_SRC */ 199 0, /* SADB_EXT_IDENTITY_DST */ 200 0, /* SADB_EXT_SENSITIVITY */ 201 0, /* SADB_EXT_PROPOSAL */ 202 0, /* SADB_EXT_SUPPORTED_AUTH */ 203 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 204 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 205 0, /* SADB_X_EXT_KMPRIVATE */ 206 0, /* SADB_X_EXT_POLICY */ 207 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 208 }; 209 210 static int ipsec_esp_keymin = 256; 211 static int ipsec_esp_auth = 0; 212 static int ipsec_ah_keymin = 128; 213 214 #ifdef SYSCTL_DECL 215 SYSCTL_DECL(_net_key); 216 #endif 217 218 #ifdef SYSCTL_INT 219 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 220 &key_debug_level, 0, ""); 221 222 /* max count of trial for the decision of spi value */ 223 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 224 &key_spi_trycnt, 0, ""); 225 226 /* minimum spi value to allocate automatically. */ 227 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 228 &key_spi_minval, 0, ""); 229 230 /* maximun spi value to allocate automatically. */ 231 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 232 &key_spi_maxval, 0, ""); 233 234 /* interval to initialize randseed */ 235 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 236 &key_int_random, 0, ""); 237 238 /* lifetime for larval SA */ 239 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 240 &key_larval_lifetime, 0, ""); 241 242 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 243 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 244 &key_blockacq_count, 0, ""); 245 246 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 247 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 248 &key_blockacq_lifetime, 0, ""); 249 250 /* ESP auth */ 251 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 252 &ipsec_esp_auth, 0, ""); 253 254 /* minimum ESP key length */ 255 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 256 &ipsec_esp_keymin, 0, ""); 257 258 /* minimum AH key length */ 259 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 260 &ipsec_ah_keymin, 0, ""); 261 262 /* perfered old SA rather than new SA */ 263 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 264 &key_prefered_oldsa, 0, ""); 265 #endif /* SYSCTL_INT */ 266 267 #ifndef LIST_FOREACH 268 #define LIST_FOREACH(elm, head, field) \ 269 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 270 #endif 271 #define __LIST_CHAINED(elm) \ 272 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 273 #define LIST_INSERT_TAIL(head, elm, type, field) \ 274 do {\ 275 struct type *curelm = LIST_FIRST(head); \ 276 if (curelm == NULL) {\ 277 LIST_INSERT_HEAD(head, elm, field); \ 278 } else { \ 279 while (LIST_NEXT(curelm, field)) \ 280 curelm = LIST_NEXT(curelm, field);\ 281 LIST_INSERT_AFTER(curelm, elm, field);\ 282 }\ 283 } while (0) 284 285 #define KEY_CHKSASTATE(head, sav, name) \ 286 do { \ 287 if ((head) != (sav)) { \ 288 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 289 (name), (head), (sav))); \ 290 continue; \ 291 } \ 292 } while (0) 293 294 #define KEY_CHKSPDIR(head, sp, name) \ 295 do { \ 296 if ((head) != (sp)) { \ 297 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 298 "anyway continue.\n", \ 299 (name), (head), (sp))); \ 300 } \ 301 } while (0) 302 303 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 304 305 #if 1 306 #define KMALLOC(p, t, n) \ 307 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 308 #define KFREE(p) \ 309 free((caddr_t)(p), M_SECA) 310 #else 311 #define KMALLOC(p, t, n) \ 312 do { \ 313 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 314 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 315 __FILE__, __LINE__, (p), #t, n); \ 316 } while (0) 317 318 #define KFREE(p) \ 319 do { \ 320 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 321 free((caddr_t)(p), M_SECA); \ 322 } while (0) 323 #endif 324 325 /* 326 * set parameters into secpolicyindex buffer. 327 * Must allocate secpolicyindex buffer passed to this function. 328 */ 329 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 330 do { \ 331 bzero((idx), sizeof(struct secpolicyindex)); \ 332 (idx)->dir = (_dir); \ 333 (idx)->prefs = (ps); \ 334 (idx)->prefd = (pd); \ 335 (idx)->ul_proto = (ulp); \ 336 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 337 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 338 } while (0) 339 340 /* 341 * set parameters into secasindex buffer. 342 * Must allocate secasindex buffer before calling this function. 343 */ 344 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 345 do { \ 346 bzero((idx), sizeof(struct secasindex)); \ 347 (idx)->proto = (p); \ 348 (idx)->mode = (m); \ 349 (idx)->reqid = (r); \ 350 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 351 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 352 } while (0) 353 354 /* key statistics */ 355 struct _keystat { 356 u_long getspi_count; /* the avarage of count to try to get new SPI */ 357 } keystat; 358 359 struct sadb_msghdr { 360 struct sadb_msg *msg; 361 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 362 int extoff[SADB_EXT_MAX + 1]; 363 int extlen[SADB_EXT_MAX + 1]; 364 }; 365 366 static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 367 static void key_freesp_so __P((struct secpolicy **)); 368 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 369 static void key_delsp __P((struct secpolicy *)); 370 static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 371 static struct secpolicy *key_getspbyid __P((u_int32_t)); 372 static u_int32_t key_newreqid __P((void)); 373 static struct mbuf *key_gather_mbuf __P((struct mbuf *, 374 const struct sadb_msghdr *, int, int, ...)); 375 static int key_spdadd __P((struct socket *, struct mbuf *, 376 const struct sadb_msghdr *)); 377 static u_int32_t key_getnewspid __P((void)); 378 static int key_spddelete __P((struct socket *, struct mbuf *, 379 const struct sadb_msghdr *)); 380 static int key_spddelete2 __P((struct socket *, struct mbuf *, 381 const struct sadb_msghdr *)); 382 static int key_spdget __P((struct socket *, struct mbuf *, 383 const struct sadb_msghdr *)); 384 static int key_spdflush __P((struct socket *, struct mbuf *, 385 const struct sadb_msghdr *)); 386 static int key_spddump __P((struct socket *, struct mbuf *, 387 const struct sadb_msghdr *)); 388 static struct mbuf *key_setdumpsp __P((struct secpolicy *, 389 u_int8_t, u_int32_t, u_int32_t)); 390 static u_int key_getspreqmsglen __P((struct secpolicy *)); 391 static int key_spdexpire __P((struct secpolicy *)); 392 static struct secashead *key_newsah __P((struct secasindex *)); 393 static void key_delsah __P((struct secashead *)); 394 static struct secasvar *key_newsav __P((struct mbuf *, 395 const struct sadb_msghdr *, struct secashead *, int *, 396 const char*, int)); 397 #define KEY_NEWSAV(m, sadb, sah, e) \ 398 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 399 static void key_delsav __P((struct secasvar *)); 400 static struct secashead *key_getsah __P((struct secasindex *)); 401 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 402 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 403 static int key_setsaval __P((struct secasvar *, struct mbuf *, 404 const struct sadb_msghdr *)); 405 static int key_mature __P((struct secasvar *)); 406 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 407 u_int8_t, u_int32_t, u_int32_t)); 408 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 409 u_int32_t, pid_t, u_int16_t)); 410 static struct mbuf *key_setsadbsa __P((struct secasvar *)); 411 static struct mbuf *key_setsadbaddr __P((u_int16_t, 412 const struct sockaddr *, u_int8_t, u_int16_t)); 413 #if 0 414 static struct mbuf *key_setsadbident __P((u_int16_t, u_int16_t, caddr_t, 415 int, u_int64_t)); 416 #endif 417 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 418 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 419 u_int32_t)); 420 static void *key_newbuf __P((const void *, u_int)); 421 #ifdef INET6 422 static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 423 #endif 424 425 /* flags for key_cmpsaidx() */ 426 #define CMP_HEAD 1 /* protocol, addresses. */ 427 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 428 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 429 #define CMP_EXACTLY 4 /* all elements. */ 430 static int key_cmpsaidx 431 __P((const struct secasindex *, const struct secasindex *, int)); 432 433 static int key_cmpspidx_exactly 434 __P((struct secpolicyindex *, struct secpolicyindex *)); 435 static int key_cmpspidx_withmask 436 __P((struct secpolicyindex *, struct secpolicyindex *)); 437 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 438 static int key_bbcmp __P((const void *, const void *, u_int)); 439 static void key_srandom __P((void)); 440 static u_int16_t key_satype2proto __P((u_int8_t)); 441 static u_int8_t key_proto2satype __P((u_int16_t)); 442 443 static int key_getspi __P((struct socket *, struct mbuf *, 444 const struct sadb_msghdr *)); 445 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 446 struct secasindex *)); 447 static int key_update __P((struct socket *, struct mbuf *, 448 const struct sadb_msghdr *)); 449 #ifdef IPSEC_DOSEQCHECK 450 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 451 #endif 452 static int key_add __P((struct socket *, struct mbuf *, 453 const struct sadb_msghdr *)); 454 static int key_setident __P((struct secashead *, struct mbuf *, 455 const struct sadb_msghdr *)); 456 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 457 const struct sadb_msghdr *)); 458 static int key_delete __P((struct socket *, struct mbuf *, 459 const struct sadb_msghdr *)); 460 static int key_get __P((struct socket *, struct mbuf *, 461 const struct sadb_msghdr *)); 462 463 static void key_getcomb_setlifetime __P((struct sadb_comb *)); 464 static struct mbuf *key_getcomb_esp __P((void)); 465 static struct mbuf *key_getcomb_ah __P((void)); 466 static struct mbuf *key_getcomb_ipcomp __P((void)); 467 static struct mbuf *key_getprop __P((const struct secasindex *)); 468 469 static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 470 #ifndef IPSEC_NONBLOCK_ACQUIRE 471 static struct secacq *key_newacq __P((const struct secasindex *)); 472 static struct secacq *key_getacq __P((const struct secasindex *)); 473 static struct secacq *key_getacqbyseq __P((u_int32_t)); 474 #endif 475 static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 476 static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 477 static int key_acquire2 __P((struct socket *, struct mbuf *, 478 const struct sadb_msghdr *)); 479 static int key_register __P((struct socket *, struct mbuf *, 480 const struct sadb_msghdr *)); 481 static int key_expire __P((struct secasvar *)); 482 static int key_flush __P((struct socket *, struct mbuf *, 483 const struct sadb_msghdr *)); 484 static int key_dump __P((struct socket *, struct mbuf *, 485 const struct sadb_msghdr *)); 486 static int key_promisc __P((struct socket *, struct mbuf *, 487 const struct sadb_msghdr *)); 488 static int key_senderror __P((struct socket *, struct mbuf *, int)); 489 static int key_validate_ext __P((const struct sadb_ext *, int)); 490 static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 491 #if 0 492 static const char *key_getfqdn __P((void)); 493 static const char *key_getuserfqdn __P((void)); 494 #endif 495 static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 496 static struct mbuf *key_alloc_mbuf __P((int)); 497 struct callout key_timehandler_ch; 498 499 #define SA_ADDREF(p) do { \ 500 (p)->refcnt++; \ 501 IPSEC_ASSERT((p)->refcnt != 0, \ 502 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 503 } while (0) 504 #define SA_DELREF(p) do { \ 505 IPSEC_ASSERT((p)->refcnt > 0, \ 506 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 507 (p)->refcnt--; \ 508 } while (0) 509 510 #define SP_ADDREF(p) do { \ 511 (p)->refcnt++; \ 512 IPSEC_ASSERT((p)->refcnt != 0, \ 513 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 514 } while (0) 515 #define SP_DELREF(p) do { \ 516 IPSEC_ASSERT((p)->refcnt > 0, \ 517 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 518 (p)->refcnt--; \ 519 } while (0) 520 521 /* 522 * Return 0 when there are known to be no SP's for the specified 523 * direction. Otherwise return 1. This is used by IPsec code 524 * to optimize performance. 525 */ 526 int 527 key_havesp(u_int dir) 528 { 529 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 530 LIST_FIRST(&sptree[dir]) != NULL : 1); 531 } 532 533 /* %%% IPsec policy management */ 534 /* 535 * allocating a SP for OUTBOUND or INBOUND packet. 536 * Must call key_freesp() later. 537 * OUT: NULL: not found 538 * others: found and return the pointer. 539 */ 540 struct secpolicy * 541 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 542 { 543 struct secpolicy *sp; 544 int s; 545 546 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 547 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 548 ("key_allocsp: invalid direction %u", dir)); 549 550 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 551 printf("DP key_allocsp from %s:%u\n", where, tag)); 552 553 /* get a SP entry */ 554 s = splsoftnet(); /*called from softclock()*/ 555 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 556 printf("*** objects\n"); 557 kdebug_secpolicyindex(spidx)); 558 559 LIST_FOREACH(sp, &sptree[dir], chain) { 560 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 561 printf("*** in SPD\n"); 562 kdebug_secpolicyindex(&sp->spidx)); 563 564 if (sp->state == IPSEC_SPSTATE_DEAD) 565 continue; 566 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 567 goto found; 568 } 569 sp = NULL; 570 found: 571 if (sp) { 572 /* sanity check */ 573 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 574 575 /* found a SPD entry */ 576 sp->lastused = time_second; 577 SP_ADDREF(sp); 578 } 579 splx(s); 580 581 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 582 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 583 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 584 return sp; 585 } 586 587 /* 588 * allocating a SP for OUTBOUND or INBOUND packet. 589 * Must call key_freesp() later. 590 * OUT: NULL: not found 591 * others: found and return the pointer. 592 */ 593 struct secpolicy * 594 key_allocsp2(u_int32_t spi, 595 union sockaddr_union *dst, 596 u_int8_t proto, 597 u_int dir, 598 const char* where, int tag) 599 { 600 struct secpolicy *sp; 601 int s; 602 603 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 604 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 605 ("key_allocsp2: invalid direction %u", dir)); 606 607 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 608 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 609 610 /* get a SP entry */ 611 s = splsoftnet(); /*called from softclock()*/ 612 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 613 printf("*** objects\n"); 614 printf("spi %u proto %u dir %u\n", spi, proto, dir); 615 kdebug_sockaddr(&dst->sa)); 616 617 LIST_FOREACH(sp, &sptree[dir], chain) { 618 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 619 printf("*** in SPD\n"); 620 kdebug_secpolicyindex(&sp->spidx)); 621 622 if (sp->state == IPSEC_SPSTATE_DEAD) 623 continue; 624 /* compare simple values, then dst address */ 625 if (sp->spidx.ul_proto != proto) 626 continue; 627 /* NB: spi's must exist and match */ 628 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 629 continue; 630 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 631 goto found; 632 } 633 sp = NULL; 634 found: 635 if (sp) { 636 /* sanity check */ 637 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 638 639 /* found a SPD entry */ 640 sp->lastused = time_second; 641 SP_ADDREF(sp); 642 } 643 splx(s); 644 645 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 646 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 647 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 648 return sp; 649 } 650 651 /* 652 * return a policy that matches this particular inbound packet. 653 * XXX slow 654 */ 655 struct secpolicy * 656 key_gettunnel(const struct sockaddr *osrc, 657 const struct sockaddr *odst, 658 const struct sockaddr *isrc, 659 const struct sockaddr *idst, 660 const char* where, int tag) 661 { 662 struct secpolicy *sp; 663 const int dir = IPSEC_DIR_INBOUND; 664 int s; 665 struct ipsecrequest *r1, *r2, *p; 666 struct secpolicyindex spidx; 667 668 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 669 printf("DP key_gettunnel from %s:%u\n", where, tag)); 670 671 if (isrc->sa_family != idst->sa_family) { 672 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 673 isrc->sa_family, idst->sa_family)); 674 sp = NULL; 675 goto done; 676 } 677 678 s = splsoftnet(); /*called from softclock()*/ 679 LIST_FOREACH(sp, &sptree[dir], chain) { 680 if (sp->state == IPSEC_SPSTATE_DEAD) 681 continue; 682 683 r1 = r2 = NULL; 684 for (p = sp->req; p; p = p->next) { 685 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 686 continue; 687 688 r1 = r2; 689 r2 = p; 690 691 if (!r1) { 692 /* here we look at address matches only */ 693 spidx = sp->spidx; 694 if (isrc->sa_len > sizeof(spidx.src) || 695 idst->sa_len > sizeof(spidx.dst)) 696 continue; 697 bcopy(isrc, &spidx.src, isrc->sa_len); 698 bcopy(idst, &spidx.dst, idst->sa_len); 699 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 700 continue; 701 } else { 702 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 703 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 704 continue; 705 } 706 707 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 708 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 709 continue; 710 711 goto found; 712 } 713 } 714 sp = NULL; 715 found: 716 if (sp) { 717 sp->lastused = time_second; 718 SP_ADDREF(sp); 719 } 720 splx(s); 721 done: 722 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 723 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 724 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 725 return sp; 726 } 727 728 /* 729 * allocating an SA entry for an *OUTBOUND* packet. 730 * checking each request entries in SP, and acquire an SA if need. 731 * OUT: 0: there are valid requests. 732 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 733 */ 734 int 735 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 736 { 737 u_int level; 738 int error; 739 740 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 741 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 742 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 743 saidx->mode == IPSEC_MODE_TUNNEL, 744 ("key_checkrequest: unexpected policy %u", saidx->mode)); 745 746 /* get current level */ 747 level = ipsec_get_reqlevel(isr); 748 749 /* 750 * XXX guard against protocol callbacks from the crypto 751 * thread as they reference ipsecrequest.sav which we 752 * temporarily null out below. Need to rethink how we 753 * handle bundled SA's in the callback thread. 754 */ 755 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 756 #if 0 757 /* 758 * We do allocate new SA only if the state of SA in the holder is 759 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 760 */ 761 if (isr->sav != NULL) { 762 if (isr->sav->sah == NULL) 763 panic("key_checkrequest: sah is null.\n"); 764 if (isr->sav == (struct secasvar *)LIST_FIRST( 765 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 766 KEY_FREESAV(&isr->sav); 767 isr->sav = NULL; 768 } 769 } 770 #else 771 /* 772 * we free any SA stashed in the IPsec request because a different 773 * SA may be involved each time this request is checked, either 774 * because new SAs are being configured, or this request is 775 * associated with an unconnected datagram socket, or this request 776 * is associated with a system default policy. 777 * 778 * The operation may have negative impact to performance. We may 779 * want to check cached SA carefully, rather than picking new SA 780 * every time. 781 */ 782 if (isr->sav != NULL) { 783 KEY_FREESAV(&isr->sav); 784 isr->sav = NULL; 785 } 786 #endif 787 788 /* 789 * new SA allocation if no SA found. 790 * key_allocsa_policy should allocate the oldest SA available. 791 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 792 */ 793 if (isr->sav == NULL) 794 isr->sav = key_allocsa_policy(saidx); 795 796 /* When there is SA. */ 797 if (isr->sav != NULL) { 798 if (isr->sav->state != SADB_SASTATE_MATURE && 799 isr->sav->state != SADB_SASTATE_DYING) 800 return EINVAL; 801 return 0; 802 } 803 804 /* there is no SA */ 805 error = key_acquire(saidx, isr->sp); 806 if (error != 0) { 807 /* XXX What should I do ? */ 808 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 809 "from key_acquire.\n", error)); 810 return error; 811 } 812 813 if (level != IPSEC_LEVEL_REQUIRE) { 814 /* XXX sigh, the interface to this routine is botched */ 815 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 816 return 0; 817 } else { 818 return ENOENT; 819 } 820 } 821 822 /* 823 * allocating a SA for policy entry from SAD. 824 * NOTE: searching SAD of aliving state. 825 * OUT: NULL: not found. 826 * others: found and return the pointer. 827 */ 828 static struct secasvar * 829 key_allocsa_policy(const struct secasindex *saidx) 830 { 831 struct secashead *sah; 832 struct secasvar *sav; 833 u_int stateidx, state; 834 835 LIST_FOREACH(sah, &sahtree, chain) { 836 if (sah->state == SADB_SASTATE_DEAD) 837 continue; 838 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 839 goto found; 840 } 841 842 return NULL; 843 844 found: 845 846 /* search valid state */ 847 for (stateidx = 0; 848 stateidx < _ARRAYLEN(saorder_state_valid); 849 stateidx++) { 850 851 state = saorder_state_valid[stateidx]; 852 853 sav = key_do_allocsa_policy(sah, state); 854 if (sav != NULL) 855 return sav; 856 } 857 858 return NULL; 859 } 860 861 /* 862 * searching SAD with direction, protocol, mode and state. 863 * called by key_allocsa_policy(). 864 * OUT: 865 * NULL : not found 866 * others : found, pointer to a SA. 867 */ 868 static struct secasvar * 869 key_do_allocsa_policy(struct secashead *sah, u_int state) 870 { 871 struct secasvar *sav, *nextsav, *candidate, *d; 872 873 /* initilize */ 874 candidate = NULL; 875 876 for (sav = LIST_FIRST(&sah->savtree[state]); 877 sav != NULL; 878 sav = nextsav) { 879 880 nextsav = LIST_NEXT(sav, chain); 881 882 /* sanity check */ 883 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 884 885 /* initialize */ 886 if (candidate == NULL) { 887 candidate = sav; 888 continue; 889 } 890 891 /* Which SA is the better ? */ 892 893 /* sanity check 2 */ 894 if (candidate->lft_c == NULL || sav->lft_c == NULL) 895 panic("key_do_allocsa_policy: " 896 "lifetime_current is NULL.\n"); 897 898 /* What the best method is to compare ? */ 899 if (key_prefered_oldsa) { 900 if (candidate->lft_c->sadb_lifetime_addtime > 901 sav->lft_c->sadb_lifetime_addtime) { 902 candidate = sav; 903 } 904 continue; 905 /*NOTREACHED*/ 906 } 907 908 /* prefered new sa rather than old sa */ 909 if (candidate->lft_c->sadb_lifetime_addtime < 910 sav->lft_c->sadb_lifetime_addtime) { 911 d = candidate; 912 candidate = sav; 913 } else 914 d = sav; 915 916 /* 917 * prepared to delete the SA when there is more 918 * suitable candidate and the lifetime of the SA is not 919 * permanent. 920 */ 921 if (d->lft_c->sadb_lifetime_addtime != 0) { 922 struct mbuf *m, *result; 923 924 key_sa_chgstate(d, SADB_SASTATE_DEAD); 925 926 IPSEC_ASSERT(d->refcnt > 0, 927 ("key_do_allocsa_policy: bogus ref count")); 928 m = key_setsadbmsg(SADB_DELETE, 0, 929 d->sah->saidx.proto, 0, 0, d->refcnt - 1); 930 if (!m) 931 goto msgfail; 932 result = m; 933 934 /* set sadb_address for saidx's. */ 935 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 936 &d->sah->saidx.src.sa, 937 d->sah->saidx.src.sa.sa_len << 3, 938 IPSEC_ULPROTO_ANY); 939 if (!m) 940 goto msgfail; 941 m_cat(result, m); 942 943 /* set sadb_address for saidx's. */ 944 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 945 &d->sah->saidx.src.sa, 946 d->sah->saidx.src.sa.sa_len << 3, 947 IPSEC_ULPROTO_ANY); 948 if (!m) 949 goto msgfail; 950 m_cat(result, m); 951 952 /* create SA extension */ 953 m = key_setsadbsa(d); 954 if (!m) 955 goto msgfail; 956 m_cat(result, m); 957 958 if (result->m_len < sizeof(struct sadb_msg)) { 959 result = m_pullup(result, 960 sizeof(struct sadb_msg)); 961 if (result == NULL) 962 goto msgfail; 963 } 964 965 result->m_pkthdr.len = 0; 966 for (m = result; m; m = m->m_next) 967 result->m_pkthdr.len += m->m_len; 968 mtod(result, struct sadb_msg *)->sadb_msg_len = 969 PFKEY_UNIT64(result->m_pkthdr.len); 970 971 if (key_sendup_mbuf(NULL, result, 972 KEY_SENDUP_REGISTERED)) 973 goto msgfail; 974 msgfail: 975 KEY_FREESAV(&d); 976 } 977 } 978 979 if (candidate) { 980 SA_ADDREF(candidate); 981 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 982 printf("DP allocsa_policy cause " 983 "refcnt++:%d SA:%p\n", 984 candidate->refcnt, candidate)); 985 } 986 return candidate; 987 } 988 989 /* 990 * allocating a usable SA entry for a *INBOUND* packet. 991 * Must call key_freesav() later. 992 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 993 * NULL: not found, or error occurred. 994 * 995 * In the comparison, no source address is used--for RFC2401 conformance. 996 * To quote, from section 4.1: 997 * A security association is uniquely identified by a triple consisting 998 * of a Security Parameter Index (SPI), an IP Destination Address, and a 999 * security protocol (AH or ESP) identifier. 1000 * Note that, however, we do need to keep source address in IPsec SA. 1001 * IKE specification and PF_KEY specification do assume that we 1002 * keep source address in IPsec SA. We see a tricky situation here. 1003 */ 1004 struct secasvar * 1005 key_allocsa( 1006 union sockaddr_union *dst, 1007 u_int proto, 1008 u_int32_t spi, 1009 const char* where, int tag) 1010 { 1011 struct secashead *sah; 1012 struct secasvar *sav; 1013 u_int stateidx, state; 1014 int s; 1015 1016 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1017 1018 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1019 printf("DP key_allocsa from %s:%u\n", where, tag)); 1020 1021 /* 1022 * searching SAD. 1023 * XXX: to be checked internal IP header somewhere. Also when 1024 * IPsec tunnel packet is received. But ESP tunnel mode is 1025 * encrypted so we can't check internal IP header. 1026 */ 1027 s = splsoftnet(); /*called from softclock()*/ 1028 LIST_FOREACH(sah, &sahtree, chain) { 1029 /* search valid state */ 1030 for (stateidx = 0; 1031 stateidx < _ARRAYLEN(saorder_state_valid); 1032 stateidx++) { 1033 state = saorder_state_valid[stateidx]; 1034 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1035 /* sanity check */ 1036 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1037 /* do not return entries w/ unusable state */ 1038 if (sav->state != SADB_SASTATE_MATURE && 1039 sav->state != SADB_SASTATE_DYING) 1040 continue; 1041 if (proto != sav->sah->saidx.proto) 1042 continue; 1043 if (spi != sav->spi) 1044 continue; 1045 #if 0 /* don't check src */ 1046 /* check src address */ 1047 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1048 continue; 1049 #endif 1050 /* check dst address */ 1051 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0) 1052 continue; 1053 SA_ADDREF(sav); 1054 goto done; 1055 } 1056 } 1057 } 1058 sav = NULL; 1059 done: 1060 splx(s); 1061 1062 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1063 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1064 sav, sav ? sav->refcnt : 0)); 1065 return sav; 1066 } 1067 1068 /* 1069 * Must be called after calling key_allocsp(). 1070 * For both the packet without socket and key_freeso(). 1071 */ 1072 void 1073 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1074 { 1075 struct secpolicy *sp = *spp; 1076 1077 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1078 1079 SP_DELREF(sp); 1080 1081 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1082 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1083 sp, sp->id, where, tag, sp->refcnt)); 1084 1085 if (sp->refcnt == 0) { 1086 *spp = NULL; 1087 key_delsp(sp); 1088 } 1089 } 1090 1091 /* 1092 * Must be called after calling key_allocsp(). 1093 * For the packet with socket. 1094 */ 1095 void 1096 key_freeso(struct socket *so) 1097 { 1098 /* sanity check */ 1099 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1100 1101 switch (so->so_proto->pr_domain->dom_family) { 1102 #ifdef INET 1103 case PF_INET: 1104 { 1105 struct inpcb *pcb = sotoinpcb(so); 1106 1107 /* Does it have a PCB ? */ 1108 if (pcb == NULL) 1109 return; 1110 key_freesp_so(&pcb->inp_sp->sp_in); 1111 key_freesp_so(&pcb->inp_sp->sp_out); 1112 } 1113 break; 1114 #endif 1115 #ifdef INET6 1116 case PF_INET6: 1117 { 1118 #ifdef HAVE_NRL_INPCB 1119 struct inpcb *pcb = sotoinpcb(so); 1120 1121 /* Does it have a PCB ? */ 1122 if (pcb == NULL) 1123 return; 1124 key_freesp_so(&pcb->inp_sp->sp_in); 1125 key_freesp_so(&pcb->inp_sp->sp_out); 1126 #else 1127 struct in6pcb *pcb = sotoin6pcb(so); 1128 1129 /* Does it have a PCB ? */ 1130 if (pcb == NULL) 1131 return; 1132 key_freesp_so(&pcb->in6p_sp->sp_in); 1133 key_freesp_so(&pcb->in6p_sp->sp_out); 1134 #endif 1135 } 1136 break; 1137 #endif /* INET6 */ 1138 default: 1139 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1140 so->so_proto->pr_domain->dom_family)); 1141 return; 1142 } 1143 } 1144 1145 static void 1146 key_freesp_so(struct secpolicy **sp) 1147 { 1148 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1149 1150 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1151 (*sp)->policy == IPSEC_POLICY_BYPASS) 1152 return; 1153 1154 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1155 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1156 KEY_FREESP(sp); 1157 } 1158 1159 /* 1160 * Must be called after calling key_allocsa(). 1161 * This function is called by key_freesp() to free some SA allocated 1162 * for a policy. 1163 */ 1164 void 1165 key_freesav(struct secasvar **psav, const char* where, int tag) 1166 { 1167 struct secasvar *sav = *psav; 1168 1169 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1170 1171 SA_DELREF(sav); 1172 1173 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1174 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1175 sav, (u_long)ntohl(sav->spi), 1176 where, tag, sav->refcnt)); 1177 1178 if (sav->refcnt == 0) { 1179 *psav = NULL; 1180 key_delsav(sav); 1181 } 1182 } 1183 1184 /* %%% SPD management */ 1185 /* 1186 * free security policy entry. 1187 */ 1188 static void 1189 key_delsp(struct secpolicy *sp) 1190 { 1191 int s; 1192 1193 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1194 1195 sp->state = IPSEC_SPSTATE_DEAD; 1196 1197 IPSEC_ASSERT(sp->refcnt == 0, 1198 ("key_delsp: SP with references deleted (refcnt %u)", 1199 sp->refcnt)); 1200 1201 s = splsoftnet(); /*called from softclock()*/ 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 KEY_FREESAV(&isr->sav); 1212 isr->sav = NULL; 1213 } 1214 1215 nextisr = isr->next; 1216 KFREE(isr); 1217 isr = nextisr; 1218 } 1219 } 1220 1221 KFREE(sp); 1222 1223 splx(s); 1224 } 1225 1226 /* 1227 * search SPD 1228 * OUT: NULL : not found 1229 * others : found, pointer to a SP. 1230 */ 1231 static struct secpolicy * 1232 key_getsp(struct secpolicyindex *spidx) 1233 { 1234 struct secpolicy *sp; 1235 1236 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1237 1238 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1239 if (sp->state == IPSEC_SPSTATE_DEAD) 1240 continue; 1241 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1242 SP_ADDREF(sp); 1243 return sp; 1244 } 1245 } 1246 1247 return NULL; 1248 } 1249 1250 /* 1251 * get SP by index. 1252 * OUT: NULL : not found 1253 * others : found, pointer to a SP. 1254 */ 1255 static struct secpolicy * 1256 key_getspbyid(u_int32_t id) 1257 { 1258 struct secpolicy *sp; 1259 1260 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1261 if (sp->state == IPSEC_SPSTATE_DEAD) 1262 continue; 1263 if (sp->id == id) { 1264 SP_ADDREF(sp); 1265 return sp; 1266 } 1267 } 1268 1269 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1270 if (sp->state == IPSEC_SPSTATE_DEAD) 1271 continue; 1272 if (sp->id == id) { 1273 SP_ADDREF(sp); 1274 return sp; 1275 } 1276 } 1277 1278 return NULL; 1279 } 1280 1281 struct secpolicy * 1282 key_newsp(const char* where, int tag) 1283 { 1284 struct secpolicy *newsp = NULL; 1285 1286 newsp = (struct secpolicy *) 1287 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1288 if (newsp) { 1289 newsp->refcnt = 1; 1290 newsp->req = NULL; 1291 } 1292 1293 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1294 printf("DP key_newsp from %s:%u return SP:%p\n", 1295 where, tag, newsp)); 1296 return newsp; 1297 } 1298 1299 /* 1300 * create secpolicy structure from sadb_x_policy structure. 1301 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1302 * so must be set properly later. 1303 */ 1304 struct secpolicy * 1305 key_msg2sp(xpl0, len, error) 1306 struct sadb_x_policy *xpl0; 1307 size_t len; 1308 int *error; 1309 { 1310 struct secpolicy *newsp; 1311 1312 /* sanity check */ 1313 if (xpl0 == NULL) 1314 panic("key_msg2sp: NULL pointer was passed.\n"); 1315 if (len < sizeof(*xpl0)) 1316 panic("key_msg2sp: invalid length.\n"); 1317 if (len != PFKEY_EXTLEN(xpl0)) { 1318 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1319 *error = EINVAL; 1320 return NULL; 1321 } 1322 1323 if ((newsp = KEY_NEWSP()) == NULL) { 1324 *error = ENOBUFS; 1325 return NULL; 1326 } 1327 1328 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1329 newsp->policy = xpl0->sadb_x_policy_type; 1330 1331 /* check policy */ 1332 switch (xpl0->sadb_x_policy_type) { 1333 case IPSEC_POLICY_DISCARD: 1334 case IPSEC_POLICY_NONE: 1335 case IPSEC_POLICY_ENTRUST: 1336 case IPSEC_POLICY_BYPASS: 1337 newsp->req = NULL; 1338 break; 1339 1340 case IPSEC_POLICY_IPSEC: 1341 { 1342 int tlen; 1343 struct sadb_x_ipsecrequest *xisr; 1344 struct ipsecrequest **p_isr = &newsp->req; 1345 1346 /* validity check */ 1347 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1348 ipseclog((LOG_DEBUG, 1349 "key_msg2sp: Invalid msg length.\n")); 1350 KEY_FREESP(&newsp); 1351 *error = EINVAL; 1352 return NULL; 1353 } 1354 1355 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1356 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1357 1358 while (tlen > 0) { 1359 /* length check */ 1360 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1361 ipseclog((LOG_DEBUG, "key_msg2sp: " 1362 "invalid ipsecrequest length.\n")); 1363 KEY_FREESP(&newsp); 1364 *error = EINVAL; 1365 return NULL; 1366 } 1367 1368 /* allocate request buffer */ 1369 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1370 if ((*p_isr) == NULL) { 1371 ipseclog((LOG_DEBUG, 1372 "key_msg2sp: No more memory.\n")); 1373 KEY_FREESP(&newsp); 1374 *error = ENOBUFS; 1375 return NULL; 1376 } 1377 bzero(*p_isr, sizeof(**p_isr)); 1378 1379 /* set values */ 1380 (*p_isr)->next = NULL; 1381 1382 switch (xisr->sadb_x_ipsecrequest_proto) { 1383 case IPPROTO_ESP: 1384 case IPPROTO_AH: 1385 case IPPROTO_IPCOMP: 1386 break; 1387 default: 1388 ipseclog((LOG_DEBUG, 1389 "key_msg2sp: invalid proto type=%u\n", 1390 xisr->sadb_x_ipsecrequest_proto)); 1391 KEY_FREESP(&newsp); 1392 *error = EPROTONOSUPPORT; 1393 return NULL; 1394 } 1395 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1396 1397 switch (xisr->sadb_x_ipsecrequest_mode) { 1398 case IPSEC_MODE_TRANSPORT: 1399 case IPSEC_MODE_TUNNEL: 1400 break; 1401 case IPSEC_MODE_ANY: 1402 default: 1403 ipseclog((LOG_DEBUG, 1404 "key_msg2sp: invalid mode=%u\n", 1405 xisr->sadb_x_ipsecrequest_mode)); 1406 KEY_FREESP(&newsp); 1407 *error = EINVAL; 1408 return NULL; 1409 } 1410 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1411 1412 switch (xisr->sadb_x_ipsecrequest_level) { 1413 case IPSEC_LEVEL_DEFAULT: 1414 case IPSEC_LEVEL_USE: 1415 case IPSEC_LEVEL_REQUIRE: 1416 break; 1417 case IPSEC_LEVEL_UNIQUE: 1418 /* validity check */ 1419 /* 1420 * If range violation of reqid, kernel will 1421 * update it, don't refuse it. 1422 */ 1423 if (xisr->sadb_x_ipsecrequest_reqid 1424 > IPSEC_MANUAL_REQID_MAX) { 1425 ipseclog((LOG_DEBUG, 1426 "key_msg2sp: reqid=%d range " 1427 "violation, updated by kernel.\n", 1428 xisr->sadb_x_ipsecrequest_reqid)); 1429 xisr->sadb_x_ipsecrequest_reqid = 0; 1430 } 1431 1432 /* allocate new reqid id if reqid is zero. */ 1433 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1434 u_int32_t reqid; 1435 if ((reqid = key_newreqid()) == 0) { 1436 KEY_FREESP(&newsp); 1437 *error = ENOBUFS; 1438 return NULL; 1439 } 1440 (*p_isr)->saidx.reqid = reqid; 1441 xisr->sadb_x_ipsecrequest_reqid = reqid; 1442 } else { 1443 /* set it for manual keying. */ 1444 (*p_isr)->saidx.reqid = 1445 xisr->sadb_x_ipsecrequest_reqid; 1446 } 1447 break; 1448 1449 default: 1450 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1451 xisr->sadb_x_ipsecrequest_level)); 1452 KEY_FREESP(&newsp); 1453 *error = EINVAL; 1454 return NULL; 1455 } 1456 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1457 1458 /* set IP addresses if there */ 1459 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1460 struct sockaddr *paddr; 1461 1462 paddr = (struct sockaddr *)(xisr + 1); 1463 1464 /* validity check */ 1465 if (paddr->sa_len 1466 > sizeof((*p_isr)->saidx.src)) { 1467 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1468 "address length.\n")); 1469 KEY_FREESP(&newsp); 1470 *error = EINVAL; 1471 return NULL; 1472 } 1473 bcopy(paddr, &(*p_isr)->saidx.src, 1474 paddr->sa_len); 1475 1476 paddr = (struct sockaddr *)((caddr_t)paddr 1477 + paddr->sa_len); 1478 1479 /* validity check */ 1480 if (paddr->sa_len 1481 > sizeof((*p_isr)->saidx.dst)) { 1482 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1483 "address length.\n")); 1484 KEY_FREESP(&newsp); 1485 *error = EINVAL; 1486 return NULL; 1487 } 1488 bcopy(paddr, &(*p_isr)->saidx.dst, 1489 paddr->sa_len); 1490 } 1491 1492 (*p_isr)->sav = NULL; 1493 (*p_isr)->sp = newsp; 1494 1495 /* initialization for the next. */ 1496 p_isr = &(*p_isr)->next; 1497 tlen -= xisr->sadb_x_ipsecrequest_len; 1498 1499 /* validity check */ 1500 if (tlen < 0) { 1501 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1502 KEY_FREESP(&newsp); 1503 *error = EINVAL; 1504 return NULL; 1505 } 1506 1507 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1508 + xisr->sadb_x_ipsecrequest_len); 1509 } 1510 } 1511 break; 1512 default: 1513 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1514 KEY_FREESP(&newsp); 1515 *error = EINVAL; 1516 return NULL; 1517 } 1518 1519 *error = 0; 1520 return newsp; 1521 } 1522 1523 static u_int32_t 1524 key_newreqid() 1525 { 1526 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1527 1528 auto_reqid = (auto_reqid == ~0 1529 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1530 1531 /* XXX should be unique check */ 1532 1533 return auto_reqid; 1534 } 1535 1536 /* 1537 * copy secpolicy struct to sadb_x_policy structure indicated. 1538 */ 1539 struct mbuf * 1540 key_sp2msg(sp) 1541 struct secpolicy *sp; 1542 { 1543 struct sadb_x_policy *xpl; 1544 int tlen; 1545 caddr_t p; 1546 struct mbuf *m; 1547 1548 /* sanity check. */ 1549 if (sp == NULL) 1550 panic("key_sp2msg: NULL pointer was passed.\n"); 1551 1552 tlen = key_getspreqmsglen(sp); 1553 1554 m = key_alloc_mbuf(tlen); 1555 if (!m || m->m_next) { /*XXX*/ 1556 if (m) 1557 m_freem(m); 1558 return NULL; 1559 } 1560 1561 m->m_len = tlen; 1562 m->m_next = NULL; 1563 xpl = mtod(m, struct sadb_x_policy *); 1564 bzero(xpl, tlen); 1565 1566 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1567 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1568 xpl->sadb_x_policy_type = sp->policy; 1569 xpl->sadb_x_policy_dir = sp->spidx.dir; 1570 xpl->sadb_x_policy_id = sp->id; 1571 p = (caddr_t)xpl + sizeof(*xpl); 1572 1573 /* if is the policy for ipsec ? */ 1574 if (sp->policy == IPSEC_POLICY_IPSEC) { 1575 struct sadb_x_ipsecrequest *xisr; 1576 struct ipsecrequest *isr; 1577 1578 for (isr = sp->req; isr != NULL; isr = isr->next) { 1579 1580 xisr = (struct sadb_x_ipsecrequest *)p; 1581 1582 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1583 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1584 xisr->sadb_x_ipsecrequest_level = isr->level; 1585 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1586 1587 p += sizeof(*xisr); 1588 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1589 p += isr->saidx.src.sa.sa_len; 1590 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1591 p += isr->saidx.src.sa.sa_len; 1592 1593 xisr->sadb_x_ipsecrequest_len = 1594 PFKEY_ALIGN8(sizeof(*xisr) 1595 + isr->saidx.src.sa.sa_len 1596 + isr->saidx.dst.sa.sa_len); 1597 } 1598 } 1599 1600 return m; 1601 } 1602 1603 /* m will not be freed nor modified */ 1604 static struct mbuf * 1605 #ifdef __STDC__ 1606 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1607 int ndeep, int nitem, ...) 1608 #else 1609 key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1610 struct mbuf *m; 1611 const struct sadb_msghdr *mhp; 1612 int ndeep; 1613 int nitem; 1614 va_dcl 1615 #endif 1616 { 1617 va_list ap; 1618 int idx; 1619 int i; 1620 struct mbuf *result = NULL, *n; 1621 int len; 1622 1623 if (m == NULL || mhp == NULL) 1624 panic("null pointer passed to key_gather"); 1625 1626 va_start(ap, nitem); 1627 for (i = 0; i < nitem; i++) { 1628 idx = va_arg(ap, int); 1629 if (idx < 0 || idx > SADB_EXT_MAX) 1630 goto fail; 1631 /* don't attempt to pull empty extension */ 1632 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1633 continue; 1634 if (idx != SADB_EXT_RESERVED && 1635 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1636 continue; 1637 1638 if (idx == SADB_EXT_RESERVED) { 1639 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1640 #ifdef DIAGNOSTIC 1641 if (len > MHLEN) 1642 panic("assumption failed"); 1643 #endif 1644 MGETHDR(n, M_DONTWAIT, MT_DATA); 1645 if (!n) 1646 goto fail; 1647 n->m_len = len; 1648 n->m_next = NULL; 1649 m_copydata(m, 0, sizeof(struct sadb_msg), 1650 mtod(n, caddr_t)); 1651 } else if (i < ndeep) { 1652 len = mhp->extlen[idx]; 1653 n = key_alloc_mbuf(len); 1654 if (!n || n->m_next) { /*XXX*/ 1655 if (n) 1656 m_freem(n); 1657 goto fail; 1658 } 1659 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1660 mtod(n, caddr_t)); 1661 } else { 1662 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1663 M_DONTWAIT); 1664 } 1665 if (n == NULL) 1666 goto fail; 1667 1668 if (result) 1669 m_cat(result, n); 1670 else 1671 result = n; 1672 } 1673 va_end(ap); 1674 1675 if ((result->m_flags & M_PKTHDR) != 0) { 1676 result->m_pkthdr.len = 0; 1677 for (n = result; n; n = n->m_next) 1678 result->m_pkthdr.len += n->m_len; 1679 } 1680 1681 return result; 1682 1683 fail: 1684 m_freem(result); 1685 return NULL; 1686 } 1687 1688 /* 1689 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1690 * add an entry to SP database, when received 1691 * <base, address(SD), (lifetime(H),) policy> 1692 * from the user(?). 1693 * Adding to SP database, 1694 * and send 1695 * <base, address(SD), (lifetime(H),) policy> 1696 * to the socket which was send. 1697 * 1698 * SPDADD set a unique policy entry. 1699 * SPDSETIDX like SPDADD without a part of policy requests. 1700 * SPDUPDATE replace a unique policy entry. 1701 * 1702 * m will always be freed. 1703 */ 1704 static int 1705 key_spdadd(so, m, mhp) 1706 struct socket *so; 1707 struct mbuf *m; 1708 const struct sadb_msghdr *mhp; 1709 { 1710 struct sadb_address *src0, *dst0; 1711 struct sadb_x_policy *xpl0, *xpl; 1712 struct sadb_lifetime *lft = NULL; 1713 struct secpolicyindex spidx; 1714 struct secpolicy *newsp; 1715 int error; 1716 1717 /* sanity check */ 1718 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1719 panic("key_spdadd: NULL pointer is passed.\n"); 1720 1721 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1722 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1723 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1724 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1725 return key_senderror(so, m, EINVAL); 1726 } 1727 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1728 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1729 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1730 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1731 return key_senderror(so, m, EINVAL); 1732 } 1733 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1734 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1735 < sizeof(struct sadb_lifetime)) { 1736 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1737 return key_senderror(so, m, EINVAL); 1738 } 1739 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1740 } 1741 1742 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1743 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1744 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1745 1746 /* make secindex */ 1747 /* XXX boundary check against sa_len */ 1748 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1749 src0 + 1, 1750 dst0 + 1, 1751 src0->sadb_address_prefixlen, 1752 dst0->sadb_address_prefixlen, 1753 src0->sadb_address_proto, 1754 &spidx); 1755 1756 /* checking the direciton. */ 1757 switch (xpl0->sadb_x_policy_dir) { 1758 case IPSEC_DIR_INBOUND: 1759 case IPSEC_DIR_OUTBOUND: 1760 break; 1761 default: 1762 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1763 mhp->msg->sadb_msg_errno = EINVAL; 1764 return 0; 1765 } 1766 1767 /* check policy */ 1768 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1769 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1770 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1771 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1772 return key_senderror(so, m, EINVAL); 1773 } 1774 1775 /* policy requests are mandatory when action is ipsec. */ 1776 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1777 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1778 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1779 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1780 return key_senderror(so, m, EINVAL); 1781 } 1782 1783 /* 1784 * checking there is SP already or not. 1785 * SPDUPDATE doesn't depend on whether there is a SP or not. 1786 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1787 * then error. 1788 */ 1789 newsp = key_getsp(&spidx); 1790 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1791 if (newsp) { 1792 newsp->state = IPSEC_SPSTATE_DEAD; 1793 KEY_FREESP(&newsp); 1794 } 1795 } else { 1796 if (newsp != NULL) { 1797 KEY_FREESP(&newsp); 1798 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1799 return key_senderror(so, m, EEXIST); 1800 } 1801 } 1802 1803 #if defined(__NetBSD__) && defined(GATEWAY) 1804 /* 1805 * Nail the ipflow cache, since we're adding/changing an SPD 1806 */ 1807 ipflow_invalidate_all(); 1808 #endif 1809 1810 /* allocation new SP entry */ 1811 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1812 return key_senderror(so, m, error); 1813 } 1814 1815 if ((newsp->id = key_getnewspid()) == 0) { 1816 KFREE(newsp); 1817 return key_senderror(so, m, ENOBUFS); 1818 } 1819 1820 /* XXX boundary check against sa_len */ 1821 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1822 src0 + 1, 1823 dst0 + 1, 1824 src0->sadb_address_prefixlen, 1825 dst0->sadb_address_prefixlen, 1826 src0->sadb_address_proto, 1827 &newsp->spidx); 1828 1829 /* sanity check on addr pair */ 1830 if (((struct sockaddr *)(src0 + 1))->sa_family != 1831 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1832 KFREE(newsp); 1833 return key_senderror(so, m, EINVAL); 1834 } 1835 if (((struct sockaddr *)(src0 + 1))->sa_len != 1836 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1837 KFREE(newsp); 1838 return key_senderror(so, m, EINVAL); 1839 } 1840 #if 1 1841 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1842 struct sockaddr *sa; 1843 sa = (struct sockaddr *)(src0 + 1); 1844 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1845 KFREE(newsp); 1846 return key_senderror(so, m, EINVAL); 1847 } 1848 } 1849 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1850 struct sockaddr *sa; 1851 sa = (struct sockaddr *)(dst0 + 1); 1852 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1853 KFREE(newsp); 1854 return key_senderror(so, m, EINVAL); 1855 } 1856 } 1857 #endif 1858 1859 newsp->created = time_second; 1860 newsp->lastused = newsp->created; 1861 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1862 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1863 1864 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1865 newsp->state = IPSEC_SPSTATE_ALIVE; 1866 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1867 1868 /* delete the entry in spacqtree */ 1869 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1870 struct secspacq *spacq; 1871 if ((spacq = key_getspacq(&spidx)) != NULL) { 1872 /* reset counter in order to deletion by timehandler. */ 1873 spacq->created = time_second; 1874 spacq->count = 0; 1875 } 1876 } 1877 1878 { 1879 struct mbuf *n, *mpolicy; 1880 struct sadb_msg *newmsg; 1881 int off; 1882 1883 /* create new sadb_msg to reply. */ 1884 if (lft) { 1885 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1886 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1887 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1888 } else { 1889 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1890 SADB_X_EXT_POLICY, 1891 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1892 } 1893 if (!n) 1894 return key_senderror(so, m, ENOBUFS); 1895 1896 if (n->m_len < sizeof(*newmsg)) { 1897 n = m_pullup(n, sizeof(*newmsg)); 1898 if (!n) 1899 return key_senderror(so, m, ENOBUFS); 1900 } 1901 newmsg = mtod(n, struct sadb_msg *); 1902 newmsg->sadb_msg_errno = 0; 1903 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1904 1905 off = 0; 1906 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1907 sizeof(*xpl), &off); 1908 if (mpolicy == NULL) { 1909 /* n is already freed */ 1910 return key_senderror(so, m, ENOBUFS); 1911 } 1912 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1913 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1914 m_freem(n); 1915 return key_senderror(so, m, EINVAL); 1916 } 1917 xpl->sadb_x_policy_id = newsp->id; 1918 1919 m_freem(m); 1920 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1921 } 1922 } 1923 1924 /* 1925 * get new policy id. 1926 * OUT: 1927 * 0: failure. 1928 * others: success. 1929 */ 1930 static u_int32_t 1931 key_getnewspid() 1932 { 1933 u_int32_t newid = 0; 1934 int count = key_spi_trycnt; /* XXX */ 1935 struct secpolicy *sp; 1936 1937 /* when requesting to allocate spi ranged */ 1938 while (count--) { 1939 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 1940 1941 if ((sp = key_getspbyid(newid)) == NULL) 1942 break; 1943 1944 KEY_FREESP(&sp); 1945 } 1946 1947 if (count == 0 || newid == 0) { 1948 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 1949 return 0; 1950 } 1951 1952 return newid; 1953 } 1954 1955 /* 1956 * SADB_SPDDELETE processing 1957 * receive 1958 * <base, address(SD), policy(*)> 1959 * from the user(?), and set SADB_SASTATE_DEAD, 1960 * and send, 1961 * <base, address(SD), policy(*)> 1962 * to the ikmpd. 1963 * policy(*) including direction of policy. 1964 * 1965 * m will always be freed. 1966 */ 1967 static int 1968 key_spddelete(so, m, mhp) 1969 struct socket *so; 1970 struct mbuf *m; 1971 const struct sadb_msghdr *mhp; 1972 { 1973 struct sadb_address *src0, *dst0; 1974 struct sadb_x_policy *xpl0; 1975 struct secpolicyindex spidx; 1976 struct secpolicy *sp; 1977 1978 /* sanity check */ 1979 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1980 panic("key_spddelete: NULL pointer is passed.\n"); 1981 1982 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1983 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1984 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1985 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 1986 return key_senderror(so, m, EINVAL); 1987 } 1988 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1989 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1990 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1991 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 1992 return key_senderror(so, m, EINVAL); 1993 } 1994 1995 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1996 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1997 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1998 1999 /* make secindex */ 2000 /* XXX boundary check against sa_len */ 2001 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2002 src0 + 1, 2003 dst0 + 1, 2004 src0->sadb_address_prefixlen, 2005 dst0->sadb_address_prefixlen, 2006 src0->sadb_address_proto, 2007 &spidx); 2008 2009 /* checking the direciton. */ 2010 switch (xpl0->sadb_x_policy_dir) { 2011 case IPSEC_DIR_INBOUND: 2012 case IPSEC_DIR_OUTBOUND: 2013 break; 2014 default: 2015 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2016 return key_senderror(so, m, EINVAL); 2017 } 2018 2019 /* Is there SP in SPD ? */ 2020 if ((sp = key_getsp(&spidx)) == NULL) { 2021 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2022 return key_senderror(so, m, EINVAL); 2023 } 2024 2025 /* save policy id to buffer to be returned. */ 2026 xpl0->sadb_x_policy_id = sp->id; 2027 2028 sp->state = IPSEC_SPSTATE_DEAD; 2029 KEY_FREESP(&sp); 2030 2031 { 2032 struct mbuf *n; 2033 struct sadb_msg *newmsg; 2034 2035 /* create new sadb_msg to reply. */ 2036 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2037 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2038 if (!n) 2039 return key_senderror(so, m, ENOBUFS); 2040 2041 newmsg = mtod(n, struct sadb_msg *); 2042 newmsg->sadb_msg_errno = 0; 2043 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2044 2045 m_freem(m); 2046 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2047 } 2048 } 2049 2050 /* 2051 * SADB_SPDDELETE2 processing 2052 * receive 2053 * <base, policy(*)> 2054 * from the user(?), and set SADB_SASTATE_DEAD, 2055 * and send, 2056 * <base, policy(*)> 2057 * to the ikmpd. 2058 * policy(*) including direction of policy. 2059 * 2060 * m will always be freed. 2061 */ 2062 static int 2063 key_spddelete2(so, m, mhp) 2064 struct socket *so; 2065 struct mbuf *m; 2066 const struct sadb_msghdr *mhp; 2067 { 2068 u_int32_t id; 2069 struct secpolicy *sp; 2070 2071 /* sanity check */ 2072 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2073 panic("key_spddelete2: NULL pointer is passed.\n"); 2074 2075 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2076 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2077 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2078 key_senderror(so, m, EINVAL); 2079 return 0; 2080 } 2081 2082 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2083 2084 /* Is there SP in SPD ? */ 2085 if ((sp = key_getspbyid(id)) == NULL) { 2086 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2087 key_senderror(so, m, EINVAL); 2088 } 2089 2090 sp->state = IPSEC_SPSTATE_DEAD; 2091 KEY_FREESP(&sp); 2092 2093 { 2094 struct mbuf *n, *nn; 2095 struct sadb_msg *newmsg; 2096 int off, len; 2097 2098 /* create new sadb_msg to reply. */ 2099 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2100 2101 if (len > MCLBYTES) 2102 return key_senderror(so, m, ENOBUFS); 2103 MGETHDR(n, M_DONTWAIT, MT_DATA); 2104 if (n && len > MHLEN) { 2105 MCLGET(n, M_DONTWAIT); 2106 if ((n->m_flags & M_EXT) == 0) { 2107 m_freem(n); 2108 n = NULL; 2109 } 2110 } 2111 if (!n) 2112 return key_senderror(so, m, ENOBUFS); 2113 2114 n->m_len = len; 2115 n->m_next = NULL; 2116 off = 0; 2117 2118 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2119 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2120 2121 #ifdef DIAGNOSTIC 2122 if (off != len) 2123 panic("length inconsistency in key_spddelete2"); 2124 #endif 2125 2126 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2127 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2128 if (!n->m_next) { 2129 m_freem(n); 2130 return key_senderror(so, m, ENOBUFS); 2131 } 2132 2133 n->m_pkthdr.len = 0; 2134 for (nn = n; nn; nn = nn->m_next) 2135 n->m_pkthdr.len += nn->m_len; 2136 2137 newmsg = mtod(n, struct sadb_msg *); 2138 newmsg->sadb_msg_errno = 0; 2139 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2140 2141 m_freem(m); 2142 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2143 } 2144 } 2145 2146 /* 2147 * SADB_X_GET processing 2148 * receive 2149 * <base, policy(*)> 2150 * from the user(?), 2151 * and send, 2152 * <base, address(SD), policy> 2153 * to the ikmpd. 2154 * policy(*) including direction of policy. 2155 * 2156 * m will always be freed. 2157 */ 2158 static int 2159 key_spdget(so, m, mhp) 2160 struct socket *so; 2161 struct mbuf *m; 2162 const struct sadb_msghdr *mhp; 2163 { 2164 u_int32_t id; 2165 struct secpolicy *sp; 2166 struct mbuf *n; 2167 2168 /* sanity check */ 2169 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2170 panic("key_spdget: NULL pointer is passed.\n"); 2171 2172 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2173 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2174 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2175 return key_senderror(so, m, EINVAL); 2176 } 2177 2178 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2179 2180 /* Is there SP in SPD ? */ 2181 if ((sp = key_getspbyid(id)) == NULL) { 2182 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2183 return key_senderror(so, m, ENOENT); 2184 } 2185 2186 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2187 if (n != NULL) { 2188 m_freem(m); 2189 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2190 } else 2191 return key_senderror(so, m, ENOBUFS); 2192 } 2193 2194 /* 2195 * SADB_X_SPDACQUIRE processing. 2196 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2197 * send 2198 * <base, policy(*)> 2199 * to KMD, and expect to receive 2200 * <base> with SADB_X_SPDACQUIRE if error occurred, 2201 * or 2202 * <base, policy> 2203 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2204 * policy(*) is without policy requests. 2205 * 2206 * 0 : succeed 2207 * others: error number 2208 */ 2209 int 2210 key_spdacquire(sp) 2211 struct secpolicy *sp; 2212 { 2213 struct mbuf *result = NULL, *m; 2214 struct secspacq *newspacq; 2215 int error; 2216 2217 /* sanity check */ 2218 if (sp == NULL) 2219 panic("key_spdacquire: NULL pointer is passed.\n"); 2220 if (sp->req != NULL) 2221 panic("key_spdacquire: called but there is request.\n"); 2222 if (sp->policy != IPSEC_POLICY_IPSEC) 2223 panic("key_spdacquire: policy mismathed. IPsec is expected.\n"); 2224 2225 /* Get an entry to check whether sent message or not. */ 2226 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2227 if (key_blockacq_count < newspacq->count) { 2228 /* reset counter and do send message. */ 2229 newspacq->count = 0; 2230 } else { 2231 /* increment counter and do nothing. */ 2232 newspacq->count++; 2233 return 0; 2234 } 2235 } else { 2236 /* make new entry for blocking to send SADB_ACQUIRE. */ 2237 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2238 return ENOBUFS; 2239 2240 /* add to acqtree */ 2241 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2242 } 2243 2244 /* create new sadb_msg to reply. */ 2245 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2246 if (!m) { 2247 error = ENOBUFS; 2248 goto fail; 2249 } 2250 result = m; 2251 2252 result->m_pkthdr.len = 0; 2253 for (m = result; m; m = m->m_next) 2254 result->m_pkthdr.len += m->m_len; 2255 2256 mtod(result, struct sadb_msg *)->sadb_msg_len = 2257 PFKEY_UNIT64(result->m_pkthdr.len); 2258 2259 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2260 2261 fail: 2262 if (result) 2263 m_freem(result); 2264 return error; 2265 } 2266 2267 /* 2268 * SADB_SPDFLUSH processing 2269 * receive 2270 * <base> 2271 * from the user, and free all entries in secpctree. 2272 * and send, 2273 * <base> 2274 * to the user. 2275 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2276 * 2277 * m will always be freed. 2278 */ 2279 static int 2280 key_spdflush(so, m, mhp) 2281 struct socket *so; 2282 struct mbuf *m; 2283 const struct sadb_msghdr *mhp; 2284 { 2285 struct sadb_msg *newmsg; 2286 struct secpolicy *sp; 2287 u_int dir; 2288 2289 /* sanity check */ 2290 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2291 panic("key_spdflush: NULL pointer is passed.\n"); 2292 2293 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2294 return key_senderror(so, m, EINVAL); 2295 2296 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2297 LIST_FOREACH(sp, &sptree[dir], chain) { 2298 sp->state = IPSEC_SPSTATE_DEAD; 2299 } 2300 } 2301 2302 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2303 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2304 return key_senderror(so, m, ENOBUFS); 2305 } 2306 2307 if (m->m_next) 2308 m_freem(m->m_next); 2309 m->m_next = NULL; 2310 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2311 newmsg = mtod(m, struct sadb_msg *); 2312 newmsg->sadb_msg_errno = 0; 2313 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2314 2315 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2316 } 2317 2318 /* 2319 * SADB_SPDDUMP processing 2320 * receive 2321 * <base> 2322 * from the user, and dump all SP leaves 2323 * and send, 2324 * <base> ..... 2325 * to the ikmpd. 2326 * 2327 * m will always be freed. 2328 */ 2329 static int 2330 key_spddump(so, m, mhp) 2331 struct socket *so; 2332 struct mbuf *m; 2333 const struct sadb_msghdr *mhp; 2334 { 2335 struct secpolicy *sp; 2336 int cnt; 2337 u_int dir; 2338 struct mbuf *n; 2339 2340 /* sanity check */ 2341 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2342 panic("key_spddump: NULL pointer is passed.\n"); 2343 2344 /* search SPD entry and get buffer size. */ 2345 cnt = 0; 2346 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2347 LIST_FOREACH(sp, &sptree[dir], chain) { 2348 cnt++; 2349 } 2350 } 2351 2352 if (cnt == 0) 2353 return key_senderror(so, m, ENOENT); 2354 2355 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2356 LIST_FOREACH(sp, &sptree[dir], chain) { 2357 --cnt; 2358 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2359 mhp->msg->sadb_msg_pid); 2360 2361 if (n) 2362 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2363 } 2364 } 2365 2366 m_freem(m); 2367 return 0; 2368 } 2369 2370 static struct mbuf * 2371 key_setdumpsp(sp, type, seq, pid) 2372 struct secpolicy *sp; 2373 u_int8_t type; 2374 u_int32_t seq, pid; 2375 { 2376 struct mbuf *result = NULL, *m; 2377 2378 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2379 if (!m) 2380 goto fail; 2381 result = m; 2382 2383 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2384 &sp->spidx.src.sa, sp->spidx.prefs, 2385 sp->spidx.ul_proto); 2386 if (!m) 2387 goto fail; 2388 m_cat(result, m); 2389 2390 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2391 &sp->spidx.dst.sa, sp->spidx.prefd, 2392 sp->spidx.ul_proto); 2393 if (!m) 2394 goto fail; 2395 m_cat(result, m); 2396 2397 m = key_sp2msg(sp); 2398 if (!m) 2399 goto fail; 2400 m_cat(result, m); 2401 2402 if ((result->m_flags & M_PKTHDR) == 0) 2403 goto fail; 2404 2405 if (result->m_len < sizeof(struct sadb_msg)) { 2406 result = m_pullup(result, sizeof(struct sadb_msg)); 2407 if (result == NULL) 2408 goto fail; 2409 } 2410 2411 result->m_pkthdr.len = 0; 2412 for (m = result; m; m = m->m_next) 2413 result->m_pkthdr.len += m->m_len; 2414 2415 mtod(result, struct sadb_msg *)->sadb_msg_len = 2416 PFKEY_UNIT64(result->m_pkthdr.len); 2417 2418 return result; 2419 2420 fail: 2421 m_freem(result); 2422 return NULL; 2423 } 2424 2425 /* 2426 * get PFKEY message length for security policy and request. 2427 */ 2428 static u_int 2429 key_getspreqmsglen(sp) 2430 struct secpolicy *sp; 2431 { 2432 u_int tlen; 2433 2434 tlen = sizeof(struct sadb_x_policy); 2435 2436 /* if is the policy for ipsec ? */ 2437 if (sp->policy != IPSEC_POLICY_IPSEC) 2438 return tlen; 2439 2440 /* get length of ipsec requests */ 2441 { 2442 struct ipsecrequest *isr; 2443 int len; 2444 2445 for (isr = sp->req; isr != NULL; isr = isr->next) { 2446 len = sizeof(struct sadb_x_ipsecrequest) 2447 + isr->saidx.src.sa.sa_len 2448 + isr->saidx.dst.sa.sa_len; 2449 2450 tlen += PFKEY_ALIGN8(len); 2451 } 2452 } 2453 2454 return tlen; 2455 } 2456 2457 /* 2458 * SADB_SPDEXPIRE processing 2459 * send 2460 * <base, address(SD), lifetime(CH), policy> 2461 * to KMD by PF_KEY. 2462 * 2463 * OUT: 0 : succeed 2464 * others : error number 2465 */ 2466 static int 2467 key_spdexpire(sp) 2468 struct secpolicy *sp; 2469 { 2470 int s; 2471 struct mbuf *result = NULL, *m; 2472 int len; 2473 int error = -1; 2474 struct sadb_lifetime *lt; 2475 2476 /* XXX: Why do we lock ? */ 2477 s = splsoftnet(); /*called from softclock()*/ 2478 2479 /* sanity check */ 2480 if (sp == NULL) 2481 panic("key_spdexpire: NULL pointer is passed.\n"); 2482 2483 /* set msg header */ 2484 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2485 if (!m) { 2486 error = ENOBUFS; 2487 goto fail; 2488 } 2489 result = m; 2490 2491 /* create lifetime extension (current and hard) */ 2492 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2493 m = key_alloc_mbuf(len); 2494 if (!m || m->m_next) { /*XXX*/ 2495 if (m) 2496 m_freem(m); 2497 error = ENOBUFS; 2498 goto fail; 2499 } 2500 bzero(mtod(m, caddr_t), len); 2501 lt = mtod(m, struct sadb_lifetime *); 2502 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2503 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2504 lt->sadb_lifetime_allocations = 0; 2505 lt->sadb_lifetime_bytes = 0; 2506 lt->sadb_lifetime_addtime = sp->created; 2507 lt->sadb_lifetime_usetime = sp->lastused; 2508 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2509 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2510 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2511 lt->sadb_lifetime_allocations = 0; 2512 lt->sadb_lifetime_bytes = 0; 2513 lt->sadb_lifetime_addtime = sp->lifetime; 2514 lt->sadb_lifetime_usetime = sp->validtime; 2515 m_cat(result, m); 2516 2517 /* set sadb_address for source */ 2518 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2519 &sp->spidx.src.sa, 2520 sp->spidx.prefs, sp->spidx.ul_proto); 2521 if (!m) { 2522 error = ENOBUFS; 2523 goto fail; 2524 } 2525 m_cat(result, m); 2526 2527 /* set sadb_address for destination */ 2528 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2529 &sp->spidx.dst.sa, 2530 sp->spidx.prefd, sp->spidx.ul_proto); 2531 if (!m) { 2532 error = ENOBUFS; 2533 goto fail; 2534 } 2535 m_cat(result, m); 2536 2537 /* set secpolicy */ 2538 m = key_sp2msg(sp); 2539 if (!m) { 2540 error = ENOBUFS; 2541 goto fail; 2542 } 2543 m_cat(result, m); 2544 2545 if ((result->m_flags & M_PKTHDR) == 0) { 2546 error = EINVAL; 2547 goto fail; 2548 } 2549 2550 if (result->m_len < sizeof(struct sadb_msg)) { 2551 result = m_pullup(result, sizeof(struct sadb_msg)); 2552 if (result == NULL) { 2553 error = ENOBUFS; 2554 goto fail; 2555 } 2556 } 2557 2558 result->m_pkthdr.len = 0; 2559 for (m = result; m; m = m->m_next) 2560 result->m_pkthdr.len += m->m_len; 2561 2562 mtod(result, struct sadb_msg *)->sadb_msg_len = 2563 PFKEY_UNIT64(result->m_pkthdr.len); 2564 2565 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2566 2567 fail: 2568 if (result) 2569 m_freem(result); 2570 splx(s); 2571 return error; 2572 } 2573 2574 /* %%% SAD management */ 2575 /* 2576 * allocating a memory for new SA head, and copy from the values of mhp. 2577 * OUT: NULL : failure due to the lack of memory. 2578 * others : pointer to new SA head. 2579 */ 2580 static struct secashead * 2581 key_newsah(saidx) 2582 struct secasindex *saidx; 2583 { 2584 struct secashead *newsah; 2585 2586 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2587 2588 newsah = (struct secashead *) 2589 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2590 if (newsah != NULL) { 2591 int i; 2592 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2593 LIST_INIT(&newsah->savtree[i]); 2594 newsah->saidx = *saidx; 2595 2596 /* add to saidxtree */ 2597 newsah->state = SADB_SASTATE_MATURE; 2598 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2599 } 2600 return(newsah); 2601 } 2602 2603 /* 2604 * delete SA index and all SA registerd. 2605 */ 2606 static void 2607 key_delsah(sah) 2608 struct secashead *sah; 2609 { 2610 struct secasvar *sav, *nextsav; 2611 u_int stateidx, state; 2612 int s; 2613 int zombie = 0; 2614 2615 /* sanity check */ 2616 if (sah == NULL) 2617 panic("key_delsah: NULL pointer is passed.\n"); 2618 2619 s = splsoftnet(); /*called from softclock()*/ 2620 2621 /* searching all SA registerd in the secindex. */ 2622 for (stateidx = 0; 2623 stateidx < _ARRAYLEN(saorder_state_any); 2624 stateidx++) { 2625 2626 state = saorder_state_any[stateidx]; 2627 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2628 sav != NULL; 2629 sav = nextsav) { 2630 2631 nextsav = LIST_NEXT(sav, chain); 2632 2633 if (sav->refcnt == 0) { 2634 /* sanity check */ 2635 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2636 KEY_FREESAV(&sav); 2637 } else { 2638 /* give up to delete this sa */ 2639 zombie++; 2640 } 2641 } 2642 } 2643 2644 /* don't delete sah only if there are savs. */ 2645 if (zombie) { 2646 splx(s); 2647 return; 2648 } 2649 2650 if (sah->sa_route.ro_rt) { 2651 RTFREE(sah->sa_route.ro_rt); 2652 sah->sa_route.ro_rt = (struct rtentry *)NULL; 2653 } 2654 2655 /* remove from tree of SA index */ 2656 if (__LIST_CHAINED(sah)) 2657 LIST_REMOVE(sah, chain); 2658 2659 KFREE(sah); 2660 2661 splx(s); 2662 return; 2663 } 2664 2665 /* 2666 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2667 * and copy the values of mhp into new buffer. 2668 * When SAD message type is GETSPI: 2669 * to set sequence number from acq_seq++, 2670 * to set zero to SPI. 2671 * not to call key_setsava(). 2672 * OUT: NULL : fail 2673 * others : pointer to new secasvar. 2674 * 2675 * does not modify mbuf. does not free mbuf on error. 2676 */ 2677 static struct secasvar * 2678 key_newsav(m, mhp, sah, errp, where, tag) 2679 struct mbuf *m; 2680 const struct sadb_msghdr *mhp; 2681 struct secashead *sah; 2682 int *errp; 2683 const char* where; 2684 int tag; 2685 { 2686 struct secasvar *newsav; 2687 const struct sadb_sa *xsa; 2688 2689 /* sanity check */ 2690 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2691 panic("key_newsa: NULL pointer is passed.\n"); 2692 2693 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2694 if (newsav == NULL) { 2695 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2696 *errp = ENOBUFS; 2697 goto done; 2698 } 2699 bzero((caddr_t)newsav, sizeof(struct secasvar)); 2700 2701 switch (mhp->msg->sadb_msg_type) { 2702 case SADB_GETSPI: 2703 newsav->spi = 0; 2704 2705 #ifdef IPSEC_DOSEQCHECK 2706 /* sync sequence number */ 2707 if (mhp->msg->sadb_msg_seq == 0) 2708 newsav->seq = 2709 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2710 else 2711 #endif 2712 newsav->seq = mhp->msg->sadb_msg_seq; 2713 break; 2714 2715 case SADB_ADD: 2716 /* sanity check */ 2717 if (mhp->ext[SADB_EXT_SA] == NULL) { 2718 KFREE(newsav), newsav = NULL; 2719 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2720 *errp = EINVAL; 2721 goto done; 2722 } 2723 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2724 newsav->spi = xsa->sadb_sa_spi; 2725 newsav->seq = mhp->msg->sadb_msg_seq; 2726 break; 2727 default: 2728 KFREE(newsav), newsav = NULL; 2729 *errp = EINVAL; 2730 goto done; 2731 } 2732 2733 /* copy sav values */ 2734 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2735 *errp = key_setsaval(newsav, m, mhp); 2736 if (*errp) { 2737 KFREE(newsav), newsav = NULL; 2738 goto done; 2739 } 2740 } 2741 2742 /* reset created */ 2743 newsav->created = time_second; 2744 newsav->pid = mhp->msg->sadb_msg_pid; 2745 2746 /* add to satree */ 2747 newsav->sah = sah; 2748 newsav->refcnt = 1; 2749 newsav->state = SADB_SASTATE_LARVAL; 2750 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2751 secasvar, chain); 2752 done: 2753 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2754 printf("DP key_newsav from %s:%u return SP:%p\n", 2755 where, tag, newsav)); 2756 2757 return newsav; 2758 } 2759 2760 /* 2761 * free() SA variable entry. 2762 */ 2763 static void 2764 key_delsav(sav) 2765 struct secasvar *sav; 2766 { 2767 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 2768 IPSEC_ASSERT(sav->refcnt == 0, 2769 ("key_delsav: reference count %u > 0", sav->refcnt)); 2770 2771 /* remove from SA header */ 2772 if (__LIST_CHAINED(sav)) 2773 LIST_REMOVE(sav, chain); 2774 2775 /* 2776 * Cleanup xform state. Note that zeroize'ing causes the 2777 * keys to be cleared; otherwise we must do it ourself. 2778 */ 2779 if (sav->tdb_xform != NULL) { 2780 sav->tdb_xform->xf_zeroize(sav); 2781 sav->tdb_xform = NULL; 2782 } else { 2783 if (sav->key_auth != NULL) 2784 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 2785 if (sav->key_enc != NULL) 2786 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 2787 } 2788 if (sav->key_auth != NULL) { 2789 KFREE(sav->key_auth); 2790 sav->key_auth = NULL; 2791 } 2792 if (sav->key_enc != NULL) { 2793 KFREE(sav->key_enc); 2794 sav->key_enc = NULL; 2795 } 2796 if (sav->sched) { 2797 bzero(sav->sched, sav->schedlen); 2798 KFREE(sav->sched); 2799 sav->sched = NULL; 2800 } 2801 if (sav->replay != NULL) { 2802 KFREE(sav->replay); 2803 sav->replay = NULL; 2804 } 2805 if (sav->lft_c != NULL) { 2806 KFREE(sav->lft_c); 2807 sav->lft_c = NULL; 2808 } 2809 if (sav->lft_h != NULL) { 2810 KFREE(sav->lft_h); 2811 sav->lft_h = NULL; 2812 } 2813 if (sav->lft_s != NULL) { 2814 KFREE(sav->lft_s); 2815 sav->lft_s = NULL; 2816 } 2817 if (sav->iv != NULL) { 2818 KFREE(sav->iv); 2819 sav->iv = NULL; 2820 } 2821 2822 KFREE(sav); 2823 2824 return; 2825 } 2826 2827 /* 2828 * search SAD. 2829 * OUT: 2830 * NULL : not found 2831 * others : found, pointer to a SA. 2832 */ 2833 static struct secashead * 2834 key_getsah(saidx) 2835 struct secasindex *saidx; 2836 { 2837 struct secashead *sah; 2838 2839 LIST_FOREACH(sah, &sahtree, chain) { 2840 if (sah->state == SADB_SASTATE_DEAD) 2841 continue; 2842 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2843 return sah; 2844 } 2845 2846 return NULL; 2847 } 2848 2849 /* 2850 * check not to be duplicated SPI. 2851 * NOTE: this function is too slow due to searching all SAD. 2852 * OUT: 2853 * NULL : not found 2854 * others : found, pointer to a SA. 2855 */ 2856 static struct secasvar * 2857 key_checkspidup(saidx, spi) 2858 struct secasindex *saidx; 2859 u_int32_t spi; 2860 { 2861 struct secashead *sah; 2862 struct secasvar *sav; 2863 2864 /* check address family */ 2865 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2866 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 2867 return NULL; 2868 } 2869 2870 /* check all SAD */ 2871 LIST_FOREACH(sah, &sahtree, chain) { 2872 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2873 continue; 2874 sav = key_getsavbyspi(sah, spi); 2875 if (sav != NULL) 2876 return sav; 2877 } 2878 2879 return NULL; 2880 } 2881 2882 /* 2883 * search SAD litmited alive SA, protocol, SPI. 2884 * OUT: 2885 * NULL : not found 2886 * others : found, pointer to a SA. 2887 */ 2888 static struct secasvar * 2889 key_getsavbyspi(sah, spi) 2890 struct secashead *sah; 2891 u_int32_t spi; 2892 { 2893 struct secasvar *sav; 2894 u_int stateidx, state; 2895 2896 /* search all status */ 2897 for (stateidx = 0; 2898 stateidx < _ARRAYLEN(saorder_state_alive); 2899 stateidx++) { 2900 2901 state = saorder_state_alive[stateidx]; 2902 LIST_FOREACH(sav, &sah->savtree[state], chain) { 2903 2904 /* sanity check */ 2905 if (sav->state != state) { 2906 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 2907 "invalid sav->state (queue: %d SA: %d)\n", 2908 state, sav->state)); 2909 continue; 2910 } 2911 2912 if (sav->spi == spi) 2913 return sav; 2914 } 2915 } 2916 2917 return NULL; 2918 } 2919 2920 /* 2921 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 2922 * You must update these if need. 2923 * OUT: 0: success. 2924 * !0: failure. 2925 * 2926 * does not modify mbuf. does not free mbuf on error. 2927 */ 2928 static int 2929 key_setsaval(sav, m, mhp) 2930 struct secasvar *sav; 2931 struct mbuf *m; 2932 const struct sadb_msghdr *mhp; 2933 { 2934 int error = 0; 2935 2936 /* sanity check */ 2937 if (m == NULL || mhp == NULL || mhp->msg == NULL) 2938 panic("key_setsaval: NULL pointer is passed.\n"); 2939 2940 /* initialization */ 2941 sav->replay = NULL; 2942 sav->key_auth = NULL; 2943 sav->key_enc = NULL; 2944 sav->sched = NULL; 2945 sav->schedlen = 0; 2946 sav->iv = NULL; 2947 sav->lft_c = NULL; 2948 sav->lft_h = NULL; 2949 sav->lft_s = NULL; 2950 sav->tdb_xform = NULL; /* transform */ 2951 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 2952 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 2953 sav->tdb_compalgxform = NULL; /* compression algorithm */ 2954 2955 /* SA */ 2956 if (mhp->ext[SADB_EXT_SA] != NULL) { 2957 const struct sadb_sa *sa0; 2958 2959 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2960 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 2961 error = EINVAL; 2962 goto fail; 2963 } 2964 2965 sav->alg_auth = sa0->sadb_sa_auth; 2966 sav->alg_enc = sa0->sadb_sa_encrypt; 2967 sav->flags = sa0->sadb_sa_flags; 2968 2969 /* replay window */ 2970 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 2971 sav->replay = (struct secreplay *) 2972 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 2973 if (sav->replay == NULL) { 2974 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 2975 error = ENOBUFS; 2976 goto fail; 2977 } 2978 if (sa0->sadb_sa_replay != 0) 2979 sav->replay->bitmap = (caddr_t)(sav->replay+1); 2980 sav->replay->wsize = sa0->sadb_sa_replay; 2981 } 2982 } 2983 2984 /* Authentication keys */ 2985 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 2986 const struct sadb_key *key0; 2987 int len; 2988 2989 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 2990 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 2991 2992 error = 0; 2993 if (len < sizeof(*key0)) { 2994 error = EINVAL; 2995 goto fail; 2996 } 2997 switch (mhp->msg->sadb_msg_satype) { 2998 case SADB_SATYPE_AH: 2999 case SADB_SATYPE_ESP: 3000 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3001 sav->alg_auth != SADB_X_AALG_NULL) 3002 error = EINVAL; 3003 break; 3004 case SADB_X_SATYPE_IPCOMP: 3005 default: 3006 error = EINVAL; 3007 break; 3008 } 3009 if (error) { 3010 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3011 goto fail; 3012 } 3013 3014 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3015 if (sav->key_auth == NULL) { 3016 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3017 error = ENOBUFS; 3018 goto fail; 3019 } 3020 } 3021 3022 /* Encryption key */ 3023 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3024 const struct sadb_key *key0; 3025 int len; 3026 3027 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3028 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3029 3030 error = 0; 3031 if (len < sizeof(*key0)) { 3032 error = EINVAL; 3033 goto fail; 3034 } 3035 switch (mhp->msg->sadb_msg_satype) { 3036 case SADB_SATYPE_ESP: 3037 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3038 sav->alg_enc != SADB_EALG_NULL) { 3039 error = EINVAL; 3040 break; 3041 } 3042 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3043 if (sav->key_enc == NULL) { 3044 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3045 error = ENOBUFS; 3046 goto fail; 3047 } 3048 break; 3049 case SADB_X_SATYPE_IPCOMP: 3050 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3051 error = EINVAL; 3052 sav->key_enc = NULL; /*just in case*/ 3053 break; 3054 case SADB_SATYPE_AH: 3055 default: 3056 error = EINVAL; 3057 break; 3058 } 3059 if (error) { 3060 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3061 goto fail; 3062 } 3063 } 3064 3065 /* set iv */ 3066 sav->ivlen = 0; 3067 3068 switch (mhp->msg->sadb_msg_satype) { 3069 case SADB_SATYPE_AH: 3070 error = xform_init(sav, XF_AH); 3071 break; 3072 case SADB_SATYPE_ESP: 3073 error = xform_init(sav, XF_ESP); 3074 break; 3075 case SADB_X_SATYPE_IPCOMP: 3076 error = xform_init(sav, XF_IPCOMP); 3077 break; 3078 } 3079 if (error) { 3080 ipseclog((LOG_DEBUG, 3081 "key_setsaval: unable to initialize SA type %u.\n", 3082 mhp->msg->sadb_msg_satype)); 3083 goto fail; 3084 } 3085 3086 /* reset created */ 3087 sav->created = time_second; 3088 3089 /* make lifetime for CURRENT */ 3090 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3091 sizeof(struct sadb_lifetime)); 3092 if (sav->lft_c == NULL) { 3093 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3094 error = ENOBUFS; 3095 goto fail; 3096 } 3097 3098 sav->lft_c->sadb_lifetime_len = 3099 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3100 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3101 sav->lft_c->sadb_lifetime_allocations = 0; 3102 sav->lft_c->sadb_lifetime_bytes = 0; 3103 sav->lft_c->sadb_lifetime_addtime = time_second; 3104 sav->lft_c->sadb_lifetime_usetime = 0; 3105 3106 /* lifetimes for HARD and SOFT */ 3107 { 3108 const struct sadb_lifetime *lft0; 3109 3110 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3111 if (lft0 != NULL) { 3112 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3113 error = EINVAL; 3114 goto fail; 3115 } 3116 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3117 sizeof(*lft0)); 3118 if (sav->lft_h == NULL) { 3119 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3120 error = ENOBUFS; 3121 goto fail; 3122 } 3123 /* to be initialize ? */ 3124 } 3125 3126 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3127 if (lft0 != NULL) { 3128 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3129 error = EINVAL; 3130 goto fail; 3131 } 3132 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3133 sizeof(*lft0)); 3134 if (sav->lft_s == NULL) { 3135 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3136 error = ENOBUFS; 3137 goto fail; 3138 } 3139 /* to be initialize ? */ 3140 } 3141 } 3142 3143 return 0; 3144 3145 fail: 3146 /* initialization */ 3147 if (sav->replay != NULL) { 3148 KFREE(sav->replay); 3149 sav->replay = NULL; 3150 } 3151 if (sav->key_auth != NULL) { 3152 KFREE(sav->key_auth); 3153 sav->key_auth = NULL; 3154 } 3155 if (sav->key_enc != NULL) { 3156 KFREE(sav->key_enc); 3157 sav->key_enc = NULL; 3158 } 3159 if (sav->sched) { 3160 KFREE(sav->sched); 3161 sav->sched = NULL; 3162 } 3163 if (sav->iv != NULL) { 3164 KFREE(sav->iv); 3165 sav->iv = NULL; 3166 } 3167 if (sav->lft_c != NULL) { 3168 KFREE(sav->lft_c); 3169 sav->lft_c = NULL; 3170 } 3171 if (sav->lft_h != NULL) { 3172 KFREE(sav->lft_h); 3173 sav->lft_h = NULL; 3174 } 3175 if (sav->lft_s != NULL) { 3176 KFREE(sav->lft_s); 3177 sav->lft_s = NULL; 3178 } 3179 3180 return error; 3181 } 3182 3183 /* 3184 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3185 * OUT: 0: valid 3186 * other: errno 3187 */ 3188 static int 3189 key_mature(sav) 3190 struct secasvar *sav; 3191 { 3192 int error; 3193 3194 /* check SPI value */ 3195 switch (sav->sah->saidx.proto) { 3196 case IPPROTO_ESP: 3197 case IPPROTO_AH: 3198 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) { 3199 ipseclog((LOG_DEBUG, 3200 "key_mature: illegal range of SPI %u.\n", 3201 (u_int32_t)ntohl(sav->spi))); 3202 return EINVAL; 3203 } 3204 break; 3205 } 3206 3207 /* check satype */ 3208 switch (sav->sah->saidx.proto) { 3209 case IPPROTO_ESP: 3210 /* check flags */ 3211 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3212 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3213 ipseclog((LOG_DEBUG, "key_mature: " 3214 "invalid flag (derived) given to old-esp.\n")); 3215 return EINVAL; 3216 } 3217 error = xform_init(sav, XF_ESP); 3218 break; 3219 case IPPROTO_AH: 3220 /* check flags */ 3221 if (sav->flags & SADB_X_EXT_DERIV) { 3222 ipseclog((LOG_DEBUG, "key_mature: " 3223 "invalid flag (derived) given to AH SA.\n")); 3224 return EINVAL; 3225 } 3226 if (sav->alg_enc != SADB_EALG_NONE) { 3227 ipseclog((LOG_DEBUG, "key_mature: " 3228 "protocol and algorithm mismated.\n")); 3229 return(EINVAL); 3230 } 3231 error = xform_init(sav, XF_AH); 3232 break; 3233 case IPPROTO_IPCOMP: 3234 if (sav->alg_auth != SADB_AALG_NONE) { 3235 ipseclog((LOG_DEBUG, "key_mature: " 3236 "protocol and algorithm mismated.\n")); 3237 return(EINVAL); 3238 } 3239 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3240 && ntohl(sav->spi) >= 0x10000) { 3241 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3242 return(EINVAL); 3243 } 3244 error = xform_init(sav, XF_IPCOMP); 3245 break; 3246 default: 3247 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3248 error = EPROTONOSUPPORT; 3249 break; 3250 } 3251 if (error == 0) 3252 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3253 return (error); 3254 } 3255 3256 /* 3257 * subroutine for SADB_GET and SADB_DUMP. 3258 */ 3259 static struct mbuf * 3260 key_setdumpsa(sav, type, satype, seq, pid) 3261 struct secasvar *sav; 3262 u_int8_t type, satype; 3263 u_int32_t seq, pid; 3264 { 3265 struct mbuf *result = NULL, *tres = NULL, *m; 3266 int l = 0; 3267 int i; 3268 void *p; 3269 int dumporder[] = { 3270 SADB_EXT_SA, SADB_X_EXT_SA2, 3271 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3272 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3273 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3274 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3275 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3276 }; 3277 3278 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3279 if (m == NULL) 3280 goto fail; 3281 result = m; 3282 3283 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3284 m = NULL; 3285 p = NULL; 3286 switch (dumporder[i]) { 3287 case SADB_EXT_SA: 3288 m = key_setsadbsa(sav); 3289 if (!m) 3290 goto fail; 3291 break; 3292 3293 case SADB_X_EXT_SA2: 3294 m = key_setsadbxsa2(sav->sah->saidx.mode, 3295 sav->replay ? sav->replay->count : 0, 3296 sav->sah->saidx.reqid); 3297 if (!m) 3298 goto fail; 3299 break; 3300 3301 case SADB_EXT_ADDRESS_SRC: 3302 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3303 &sav->sah->saidx.src.sa, 3304 FULLMASK, IPSEC_ULPROTO_ANY); 3305 if (!m) 3306 goto fail; 3307 break; 3308 3309 case SADB_EXT_ADDRESS_DST: 3310 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3311 &sav->sah->saidx.dst.sa, 3312 FULLMASK, IPSEC_ULPROTO_ANY); 3313 if (!m) 3314 goto fail; 3315 break; 3316 3317 case SADB_EXT_KEY_AUTH: 3318 if (!sav->key_auth) 3319 continue; 3320 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3321 p = sav->key_auth; 3322 break; 3323 3324 case SADB_EXT_KEY_ENCRYPT: 3325 if (!sav->key_enc) 3326 continue; 3327 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3328 p = sav->key_enc; 3329 break; 3330 3331 case SADB_EXT_LIFETIME_CURRENT: 3332 if (!sav->lft_c) 3333 continue; 3334 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3335 p = sav->lft_c; 3336 break; 3337 3338 case SADB_EXT_LIFETIME_HARD: 3339 if (!sav->lft_h) 3340 continue; 3341 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3342 p = sav->lft_h; 3343 break; 3344 3345 case SADB_EXT_LIFETIME_SOFT: 3346 if (!sav->lft_s) 3347 continue; 3348 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3349 p = sav->lft_s; 3350 break; 3351 3352 case SADB_EXT_ADDRESS_PROXY: 3353 case SADB_EXT_IDENTITY_SRC: 3354 case SADB_EXT_IDENTITY_DST: 3355 /* XXX: should we brought from SPD ? */ 3356 case SADB_EXT_SENSITIVITY: 3357 default: 3358 continue; 3359 } 3360 3361 if ((!m && !p) || (m && p)) 3362 goto fail; 3363 if (p && tres) { 3364 M_PREPEND(tres, l, M_DONTWAIT); 3365 if (!tres) 3366 goto fail; 3367 bcopy(p, mtod(tres, caddr_t), l); 3368 continue; 3369 } 3370 if (p) { 3371 m = key_alloc_mbuf(l); 3372 if (!m) 3373 goto fail; 3374 m_copyback(m, 0, l, p); 3375 } 3376 3377 if (tres) 3378 m_cat(m, tres); 3379 tres = m; 3380 } 3381 3382 m_cat(result, tres); 3383 3384 if (result->m_len < sizeof(struct sadb_msg)) { 3385 result = m_pullup(result, sizeof(struct sadb_msg)); 3386 if (result == NULL) 3387 goto fail; 3388 } 3389 3390 result->m_pkthdr.len = 0; 3391 for (m = result; m; m = m->m_next) 3392 result->m_pkthdr.len += m->m_len; 3393 3394 mtod(result, struct sadb_msg *)->sadb_msg_len = 3395 PFKEY_UNIT64(result->m_pkthdr.len); 3396 3397 return result; 3398 3399 fail: 3400 m_freem(result); 3401 m_freem(tres); 3402 return NULL; 3403 } 3404 3405 /* 3406 * set data into sadb_msg. 3407 */ 3408 static struct mbuf * 3409 key_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3410 u_int8_t type, satype; 3411 u_int16_t tlen; 3412 u_int32_t seq; 3413 pid_t pid; 3414 u_int16_t reserved; 3415 { 3416 struct mbuf *m; 3417 struct sadb_msg *p; 3418 int len; 3419 3420 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3421 if (len > MCLBYTES) 3422 return NULL; 3423 MGETHDR(m, M_DONTWAIT, MT_DATA); 3424 if (m && len > MHLEN) { 3425 MCLGET(m, M_DONTWAIT); 3426 if ((m->m_flags & M_EXT) == 0) { 3427 m_freem(m); 3428 m = NULL; 3429 } 3430 } 3431 if (!m) 3432 return NULL; 3433 m->m_pkthdr.len = m->m_len = len; 3434 m->m_next = NULL; 3435 3436 p = mtod(m, struct sadb_msg *); 3437 3438 bzero(p, len); 3439 p->sadb_msg_version = PF_KEY_V2; 3440 p->sadb_msg_type = type; 3441 p->sadb_msg_errno = 0; 3442 p->sadb_msg_satype = satype; 3443 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3444 p->sadb_msg_reserved = reserved; 3445 p->sadb_msg_seq = seq; 3446 p->sadb_msg_pid = (u_int32_t)pid; 3447 3448 return m; 3449 } 3450 3451 /* 3452 * copy secasvar data into sadb_address. 3453 */ 3454 static struct mbuf * 3455 key_setsadbsa(sav) 3456 struct secasvar *sav; 3457 { 3458 struct mbuf *m; 3459 struct sadb_sa *p; 3460 int len; 3461 3462 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3463 m = key_alloc_mbuf(len); 3464 if (!m || m->m_next) { /*XXX*/ 3465 if (m) 3466 m_freem(m); 3467 return NULL; 3468 } 3469 3470 p = mtod(m, struct sadb_sa *); 3471 3472 bzero(p, len); 3473 p->sadb_sa_len = PFKEY_UNIT64(len); 3474 p->sadb_sa_exttype = SADB_EXT_SA; 3475 p->sadb_sa_spi = sav->spi; 3476 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3477 p->sadb_sa_state = sav->state; 3478 p->sadb_sa_auth = sav->alg_auth; 3479 p->sadb_sa_encrypt = sav->alg_enc; 3480 p->sadb_sa_flags = sav->flags; 3481 3482 return m; 3483 } 3484 3485 /* 3486 * set data into sadb_address. 3487 */ 3488 static struct mbuf * 3489 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3490 u_int16_t exttype; 3491 const struct sockaddr *saddr; 3492 u_int8_t prefixlen; 3493 u_int16_t ul_proto; 3494 { 3495 struct mbuf *m; 3496 struct sadb_address *p; 3497 size_t len; 3498 3499 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3500 PFKEY_ALIGN8(saddr->sa_len); 3501 m = key_alloc_mbuf(len); 3502 if (!m || m->m_next) { /*XXX*/ 3503 if (m) 3504 m_freem(m); 3505 return NULL; 3506 } 3507 3508 p = mtod(m, struct sadb_address *); 3509 3510 bzero(p, len); 3511 p->sadb_address_len = PFKEY_UNIT64(len); 3512 p->sadb_address_exttype = exttype; 3513 p->sadb_address_proto = ul_proto; 3514 if (prefixlen == FULLMASK) { 3515 switch (saddr->sa_family) { 3516 case AF_INET: 3517 prefixlen = sizeof(struct in_addr) << 3; 3518 break; 3519 case AF_INET6: 3520 prefixlen = sizeof(struct in6_addr) << 3; 3521 break; 3522 default: 3523 ; /*XXX*/ 3524 } 3525 } 3526 p->sadb_address_prefixlen = prefixlen; 3527 p->sadb_address_reserved = 0; 3528 3529 bcopy(saddr, 3530 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3531 saddr->sa_len); 3532 3533 return m; 3534 } 3535 3536 #if 0 3537 /* 3538 * set data into sadb_ident. 3539 */ 3540 static struct mbuf * 3541 key_setsadbident(exttype, idtype, string, stringlen, id) 3542 u_int16_t exttype, idtype; 3543 caddr_t string; 3544 int stringlen; 3545 u_int64_t id; 3546 { 3547 struct mbuf *m; 3548 struct sadb_ident *p; 3549 size_t len; 3550 3551 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3552 m = key_alloc_mbuf(len); 3553 if (!m || m->m_next) { /*XXX*/ 3554 if (m) 3555 m_freem(m); 3556 return NULL; 3557 } 3558 3559 p = mtod(m, struct sadb_ident *); 3560 3561 bzero(p, len); 3562 p->sadb_ident_len = PFKEY_UNIT64(len); 3563 p->sadb_ident_exttype = exttype; 3564 p->sadb_ident_type = idtype; 3565 p->sadb_ident_reserved = 0; 3566 p->sadb_ident_id = id; 3567 3568 bcopy(string, 3569 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3570 stringlen); 3571 3572 return m; 3573 } 3574 #endif 3575 3576 /* 3577 * set data into sadb_x_sa2. 3578 */ 3579 static struct mbuf * 3580 key_setsadbxsa2(mode, seq, reqid) 3581 u_int8_t mode; 3582 u_int32_t seq, reqid; 3583 { 3584 struct mbuf *m; 3585 struct sadb_x_sa2 *p; 3586 size_t len; 3587 3588 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3589 m = key_alloc_mbuf(len); 3590 if (!m || m->m_next) { /*XXX*/ 3591 if (m) 3592 m_freem(m); 3593 return NULL; 3594 } 3595 3596 p = mtod(m, struct sadb_x_sa2 *); 3597 3598 bzero(p, len); 3599 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3600 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3601 p->sadb_x_sa2_mode = mode; 3602 p->sadb_x_sa2_reserved1 = 0; 3603 p->sadb_x_sa2_reserved2 = 0; 3604 p->sadb_x_sa2_sequence = seq; 3605 p->sadb_x_sa2_reqid = reqid; 3606 3607 return m; 3608 } 3609 3610 /* 3611 * set data into sadb_x_policy 3612 */ 3613 static struct mbuf * 3614 key_setsadbxpolicy(type, dir, id) 3615 u_int16_t type; 3616 u_int8_t dir; 3617 u_int32_t id; 3618 { 3619 struct mbuf *m; 3620 struct sadb_x_policy *p; 3621 size_t len; 3622 3623 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3624 m = key_alloc_mbuf(len); 3625 if (!m || m->m_next) { /*XXX*/ 3626 if (m) 3627 m_freem(m); 3628 return NULL; 3629 } 3630 3631 p = mtod(m, struct sadb_x_policy *); 3632 3633 bzero(p, len); 3634 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3635 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3636 p->sadb_x_policy_type = type; 3637 p->sadb_x_policy_dir = dir; 3638 p->sadb_x_policy_id = id; 3639 3640 return m; 3641 } 3642 3643 /* %%% utilities */ 3644 /* 3645 * copy a buffer into the new buffer allocated. 3646 */ 3647 static void * 3648 key_newbuf(src, len) 3649 const void *src; 3650 u_int len; 3651 { 3652 caddr_t new; 3653 3654 KMALLOC(new, caddr_t, len); 3655 if (new == NULL) { 3656 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 3657 return NULL; 3658 } 3659 bcopy(src, new, len); 3660 3661 return new; 3662 } 3663 3664 /* compare my own address 3665 * OUT: 1: true, i.e. my address. 3666 * 0: false 3667 */ 3668 int 3669 key_ismyaddr(sa) 3670 struct sockaddr *sa; 3671 { 3672 #ifdef INET 3673 struct sockaddr_in *sin; 3674 struct in_ifaddr *ia; 3675 #endif 3676 3677 /* sanity check */ 3678 if (sa == NULL) 3679 panic("key_ismyaddr: NULL pointer is passed.\n"); 3680 3681 switch (sa->sa_family) { 3682 #ifdef INET 3683 case AF_INET: 3684 sin = (struct sockaddr_in *)sa; 3685 for (ia = in_ifaddrhead.tqh_first; ia; 3686 ia = ia->ia_link.tqe_next) 3687 { 3688 if (sin->sin_family == ia->ia_addr.sin_family && 3689 sin->sin_len == ia->ia_addr.sin_len && 3690 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3691 { 3692 return 1; 3693 } 3694 } 3695 break; 3696 #endif 3697 #ifdef INET6 3698 case AF_INET6: 3699 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3700 #endif 3701 } 3702 3703 return 0; 3704 } 3705 3706 #ifdef INET6 3707 /* 3708 * compare my own address for IPv6. 3709 * 1: ours 3710 * 0: other 3711 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3712 */ 3713 #include <netinet6/in6_var.h> 3714 3715 static int 3716 key_ismyaddr6(sin6) 3717 struct sockaddr_in6 *sin6; 3718 { 3719 struct in6_ifaddr *ia; 3720 struct in6_multi *in6m; 3721 3722 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 3723 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3724 (struct sockaddr *)&ia->ia_addr, 0) == 0) 3725 return 1; 3726 3727 /* 3728 * XXX Multicast 3729 * XXX why do we care about multlicast here while we don't care 3730 * about IPv4 multicast?? 3731 * XXX scope 3732 */ 3733 in6m = NULL; 3734 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3735 if (in6m) 3736 return 1; 3737 } 3738 3739 /* loopback, just for safety */ 3740 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3741 return 1; 3742 3743 return 0; 3744 } 3745 #endif /*INET6*/ 3746 3747 /* 3748 * compare two secasindex structure. 3749 * flag can specify to compare 2 saidxes. 3750 * compare two secasindex structure without both mode and reqid. 3751 * don't compare port. 3752 * IN: 3753 * saidx0: source, it can be in SAD. 3754 * saidx1: object. 3755 * OUT: 3756 * 1 : equal 3757 * 0 : not equal 3758 */ 3759 static int 3760 key_cmpsaidx( 3761 const struct secasindex *saidx0, 3762 const struct secasindex *saidx1, 3763 int flag) 3764 { 3765 /* sanity */ 3766 if (saidx0 == NULL && saidx1 == NULL) 3767 return 1; 3768 3769 if (saidx0 == NULL || saidx1 == NULL) 3770 return 0; 3771 3772 if (saidx0->proto != saidx1->proto) 3773 return 0; 3774 3775 if (flag == CMP_EXACTLY) { 3776 if (saidx0->mode != saidx1->mode) 3777 return 0; 3778 if (saidx0->reqid != saidx1->reqid) 3779 return 0; 3780 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3781 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3782 return 0; 3783 } else { 3784 3785 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3786 if (flag == CMP_MODE_REQID 3787 ||flag == CMP_REQID) { 3788 /* 3789 * If reqid of SPD is non-zero, unique SA is required. 3790 * The result must be of same reqid in this case. 3791 */ 3792 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3793 return 0; 3794 } 3795 3796 if (flag == CMP_MODE_REQID) { 3797 if (saidx0->mode != IPSEC_MODE_ANY 3798 && saidx0->mode != saidx1->mode) 3799 return 0; 3800 } 3801 3802 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3803 return 0; 3804 } 3805 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 3806 return 0; 3807 } 3808 } 3809 3810 return 1; 3811 } 3812 3813 /* 3814 * compare two secindex structure exactly. 3815 * IN: 3816 * spidx0: source, it is often in SPD. 3817 * spidx1: object, it is often from PFKEY message. 3818 * OUT: 3819 * 1 : equal 3820 * 0 : not equal 3821 */ 3822 static int 3823 key_cmpspidx_exactly( 3824 struct secpolicyindex *spidx0, 3825 struct secpolicyindex *spidx1) 3826 { 3827 /* sanity */ 3828 if (spidx0 == NULL && spidx1 == NULL) 3829 return 1; 3830 3831 if (spidx0 == NULL || spidx1 == NULL) 3832 return 0; 3833 3834 if (spidx0->prefs != spidx1->prefs 3835 || spidx0->prefd != spidx1->prefd 3836 || spidx0->ul_proto != spidx1->ul_proto) 3837 return 0; 3838 3839 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 3840 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 3841 } 3842 3843 /* 3844 * compare two secindex structure with mask. 3845 * IN: 3846 * spidx0: source, it is often in SPD. 3847 * spidx1: object, it is often from IP header. 3848 * OUT: 3849 * 1 : equal 3850 * 0 : not equal 3851 */ 3852 static int 3853 key_cmpspidx_withmask( 3854 struct secpolicyindex *spidx0, 3855 struct secpolicyindex *spidx1) 3856 { 3857 /* sanity */ 3858 if (spidx0 == NULL && spidx1 == NULL) 3859 return 1; 3860 3861 if (spidx0 == NULL || spidx1 == NULL) 3862 return 0; 3863 3864 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 3865 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 3866 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 3867 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 3868 return 0; 3869 3870 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 3871 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 3872 && spidx0->ul_proto != spidx1->ul_proto) 3873 return 0; 3874 3875 switch (spidx0->src.sa.sa_family) { 3876 case AF_INET: 3877 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 3878 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 3879 return 0; 3880 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 3881 &spidx1->src.sin.sin_addr, spidx0->prefs)) 3882 return 0; 3883 break; 3884 case AF_INET6: 3885 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 3886 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 3887 return 0; 3888 /* 3889 * scope_id check. if sin6_scope_id is 0, we regard it 3890 * as a wildcard scope, which matches any scope zone ID. 3891 */ 3892 if (spidx0->src.sin6.sin6_scope_id && 3893 spidx1->src.sin6.sin6_scope_id && 3894 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 3895 return 0; 3896 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 3897 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 3898 return 0; 3899 break; 3900 default: 3901 /* XXX */ 3902 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 3903 return 0; 3904 break; 3905 } 3906 3907 switch (spidx0->dst.sa.sa_family) { 3908 case AF_INET: 3909 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 3910 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 3911 return 0; 3912 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 3913 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 3914 return 0; 3915 break; 3916 case AF_INET6: 3917 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 3918 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 3919 return 0; 3920 /* 3921 * scope_id check. if sin6_scope_id is 0, we regard it 3922 * as a wildcard scope, which matches any scope zone ID. 3923 */ 3924 if (spidx0->src.sin6.sin6_scope_id && 3925 spidx1->src.sin6.sin6_scope_id && 3926 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 3927 return 0; 3928 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 3929 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 3930 return 0; 3931 break; 3932 default: 3933 /* XXX */ 3934 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 3935 return 0; 3936 break; 3937 } 3938 3939 /* XXX Do we check other field ? e.g. flowinfo */ 3940 3941 return 1; 3942 } 3943 3944 /* returns 0 on match */ 3945 static int 3946 key_sockaddrcmp( 3947 const struct sockaddr *sa1, 3948 const struct sockaddr *sa2, 3949 int port) 3950 { 3951 #ifdef satosin 3952 #undef satosin 3953 #endif 3954 #define satosin(s) ((const struct sockaddr_in *)s) 3955 #ifdef satosin6 3956 #undef satosin6 3957 #endif 3958 #define satosin6(s) ((const struct sockaddr_in6 *)s) 3959 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 3960 return 1; 3961 3962 switch (sa1->sa_family) { 3963 case AF_INET: 3964 if (sa1->sa_len != sizeof(struct sockaddr_in)) 3965 return 1; 3966 if (satosin(sa1)->sin_addr.s_addr != 3967 satosin(sa2)->sin_addr.s_addr) { 3968 return 1; 3969 } 3970 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 3971 return 1; 3972 break; 3973 case AF_INET6: 3974 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 3975 return 1; /*EINVAL*/ 3976 if (satosin6(sa1)->sin6_scope_id != 3977 satosin6(sa2)->sin6_scope_id) { 3978 return 1; 3979 } 3980 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 3981 &satosin6(sa2)->sin6_addr)) { 3982 return 1; 3983 } 3984 if (port && 3985 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 3986 return 1; 3987 } 3988 default: 3989 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 3990 return 1; 3991 break; 3992 } 3993 3994 return 0; 3995 #undef satosin 3996 #undef satosin6 3997 } 3998 3999 /* 4000 * compare two buffers with mask. 4001 * IN: 4002 * addr1: source 4003 * addr2: object 4004 * bits: Number of bits to compare 4005 * OUT: 4006 * 1 : equal 4007 * 0 : not equal 4008 */ 4009 static int 4010 key_bbcmp(const void *a1, const void *a2, u_int bits) 4011 { 4012 const unsigned char *p1 = a1; 4013 const unsigned char *p2 = a2; 4014 4015 /* XXX: This could be considerably faster if we compare a word 4016 * at a time, but it is complicated on LSB Endian machines */ 4017 4018 /* Handle null pointers */ 4019 if (p1 == NULL || p2 == NULL) 4020 return (p1 == p2); 4021 4022 while (bits >= 8) { 4023 if (*p1++ != *p2++) 4024 return 0; 4025 bits -= 8; 4026 } 4027 4028 if (bits > 0) { 4029 u_int8_t mask = ~((1<<(8-bits))-1); 4030 if ((*p1 & mask) != (*p2 & mask)) 4031 return 0; 4032 } 4033 return 1; /* Match! */ 4034 } 4035 4036 /* 4037 * time handler. 4038 * scanning SPD and SAD to check status for each entries, 4039 * and do to remove or to expire. 4040 * XXX: year 2038 problem may remain. 4041 */ 4042 void 4043 key_timehandler(void* arg) 4044 { 4045 u_int dir; 4046 int s; 4047 time_t now = time_second; 4048 4049 s = splsoftnet(); /*called from softclock()*/ 4050 4051 /* SPD */ 4052 { 4053 struct secpolicy *sp, *nextsp; 4054 4055 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4056 for (sp = LIST_FIRST(&sptree[dir]); 4057 sp != NULL; 4058 sp = nextsp) { 4059 4060 nextsp = LIST_NEXT(sp, chain); 4061 4062 if (sp->state == IPSEC_SPSTATE_DEAD) { 4063 KEY_FREESP(&sp); 4064 continue; 4065 } 4066 4067 if (sp->lifetime == 0 && sp->validtime == 0) 4068 continue; 4069 4070 /* the deletion will occur next time */ 4071 if ((sp->lifetime && now - sp->created > sp->lifetime) 4072 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4073 sp->state = IPSEC_SPSTATE_DEAD; 4074 key_spdexpire(sp); 4075 continue; 4076 } 4077 } 4078 } 4079 } 4080 4081 /* SAD */ 4082 { 4083 struct secashead *sah, *nextsah; 4084 struct secasvar *sav, *nextsav; 4085 4086 for (sah = LIST_FIRST(&sahtree); 4087 sah != NULL; 4088 sah = nextsah) { 4089 4090 nextsah = LIST_NEXT(sah, chain); 4091 4092 /* if sah has been dead, then delete it and process next sah. */ 4093 if (sah->state == SADB_SASTATE_DEAD) { 4094 key_delsah(sah); 4095 continue; 4096 } 4097 4098 /* if LARVAL entry doesn't become MATURE, delete it. */ 4099 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4100 sav != NULL; 4101 sav = nextsav) { 4102 4103 nextsav = LIST_NEXT(sav, chain); 4104 4105 if (now - sav->created > key_larval_lifetime) { 4106 KEY_FREESAV(&sav); 4107 } 4108 } 4109 4110 /* 4111 * check MATURE entry to start to send expire message 4112 * whether or not. 4113 */ 4114 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4115 sav != NULL; 4116 sav = nextsav) { 4117 4118 nextsav = LIST_NEXT(sav, chain); 4119 4120 /* we don't need to check. */ 4121 if (sav->lft_s == NULL) 4122 continue; 4123 4124 /* sanity check */ 4125 if (sav->lft_c == NULL) { 4126 ipseclog((LOG_DEBUG,"key_timehandler: " 4127 "There is no CURRENT time, why?\n")); 4128 continue; 4129 } 4130 4131 /* check SOFT lifetime */ 4132 if (sav->lft_s->sadb_lifetime_addtime != 0 4133 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4134 /* 4135 * check SA to be used whether or not. 4136 * when SA hasn't been used, delete it. 4137 */ 4138 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4139 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4140 KEY_FREESAV(&sav); 4141 } else { 4142 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4143 /* 4144 * XXX If we keep to send expire 4145 * message in the status of 4146 * DYING. Do remove below code. 4147 */ 4148 key_expire(sav); 4149 } 4150 } 4151 /* check SOFT lifetime by bytes */ 4152 /* 4153 * XXX I don't know the way to delete this SA 4154 * when new SA is installed. Caution when it's 4155 * installed too big lifetime by time. 4156 */ 4157 else if (sav->lft_s->sadb_lifetime_bytes != 0 4158 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4159 4160 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4161 /* 4162 * XXX If we keep to send expire 4163 * message in the status of 4164 * DYING. Do remove below code. 4165 */ 4166 key_expire(sav); 4167 } 4168 } 4169 4170 /* check DYING entry to change status to DEAD. */ 4171 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4172 sav != NULL; 4173 sav = nextsav) { 4174 4175 nextsav = LIST_NEXT(sav, chain); 4176 4177 /* we don't need to check. */ 4178 if (sav->lft_h == NULL) 4179 continue; 4180 4181 /* sanity check */ 4182 if (sav->lft_c == NULL) { 4183 ipseclog((LOG_DEBUG, "key_timehandler: " 4184 "There is no CURRENT time, why?\n")); 4185 continue; 4186 } 4187 4188 if (sav->lft_h->sadb_lifetime_addtime != 0 4189 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4190 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4191 KEY_FREESAV(&sav); 4192 } 4193 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4194 else if (sav->lft_s != NULL 4195 && sav->lft_s->sadb_lifetime_addtime != 0 4196 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4197 /* 4198 * XXX: should be checked to be 4199 * installed the valid SA. 4200 */ 4201 4202 /* 4203 * If there is no SA then sending 4204 * expire message. 4205 */ 4206 key_expire(sav); 4207 } 4208 #endif 4209 /* check HARD lifetime by bytes */ 4210 else if (sav->lft_h->sadb_lifetime_bytes != 0 4211 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4212 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4213 KEY_FREESAV(&sav); 4214 } 4215 } 4216 4217 /* delete entry in DEAD */ 4218 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4219 sav != NULL; 4220 sav = nextsav) { 4221 4222 nextsav = LIST_NEXT(sav, chain); 4223 4224 /* sanity check */ 4225 if (sav->state != SADB_SASTATE_DEAD) { 4226 ipseclog((LOG_DEBUG, "key_timehandler: " 4227 "invalid sav->state " 4228 "(queue: %d SA: %d): " 4229 "kill it anyway\n", 4230 SADB_SASTATE_DEAD, sav->state)); 4231 } 4232 4233 /* 4234 * do not call key_freesav() here. 4235 * sav should already be freed, and sav->refcnt 4236 * shows other references to sav 4237 * (such as from SPD). 4238 */ 4239 } 4240 } 4241 } 4242 4243 #ifndef IPSEC_NONBLOCK_ACQUIRE 4244 /* ACQ tree */ 4245 { 4246 struct secacq *acq, *nextacq; 4247 4248 for (acq = LIST_FIRST(&acqtree); 4249 acq != NULL; 4250 acq = nextacq) { 4251 4252 nextacq = LIST_NEXT(acq, chain); 4253 4254 if (now - acq->created > key_blockacq_lifetime 4255 && __LIST_CHAINED(acq)) { 4256 LIST_REMOVE(acq, chain); 4257 KFREE(acq); 4258 } 4259 } 4260 } 4261 #endif 4262 4263 /* SP ACQ tree */ 4264 { 4265 struct secspacq *acq, *nextacq; 4266 4267 for (acq = LIST_FIRST(&spacqtree); 4268 acq != NULL; 4269 acq = nextacq) { 4270 4271 nextacq = LIST_NEXT(acq, chain); 4272 4273 if (now - acq->created > key_blockacq_lifetime 4274 && __LIST_CHAINED(acq)) { 4275 LIST_REMOVE(acq, chain); 4276 KFREE(acq); 4277 } 4278 } 4279 } 4280 4281 /* initialize random seed */ 4282 if (key_tick_init_random++ > key_int_random) { 4283 key_tick_init_random = 0; 4284 key_srandom(); 4285 } 4286 4287 #ifndef IPSEC_DEBUG2 4288 /* do exchange to tick time !! */ 4289 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 4290 #endif /* IPSEC_DEBUG2 */ 4291 4292 splx(s); 4293 return; 4294 } 4295 4296 #ifdef __NetBSD__ 4297 void srandom(int arg); 4298 void srandom(int arg) {return;} 4299 #endif 4300 4301 /* 4302 * to initialize a seed for random() 4303 */ 4304 static void 4305 key_srandom() 4306 { 4307 srandom(time_second); 4308 } 4309 4310 u_long 4311 key_random() 4312 { 4313 u_long value; 4314 4315 key_randomfill(&value, sizeof(value)); 4316 return value; 4317 } 4318 4319 void 4320 key_randomfill(p, l) 4321 void *p; 4322 size_t l; 4323 { 4324 size_t n; 4325 u_long v; 4326 static int warn = 1; 4327 4328 n = 0; 4329 n = (size_t)read_random(p, (u_int)l); 4330 /* last resort */ 4331 while (n < l) { 4332 v = random(); 4333 bcopy(&v, (u_int8_t *)p + n, 4334 l - n < sizeof(v) ? l - n : sizeof(v)); 4335 n += sizeof(v); 4336 4337 if (warn) { 4338 printf("WARNING: pseudo-random number generator " 4339 "used for IPsec processing\n"); 4340 warn = 0; 4341 } 4342 } 4343 } 4344 4345 /* 4346 * map SADB_SATYPE_* to IPPROTO_*. 4347 * if satype == SADB_SATYPE then satype is mapped to ~0. 4348 * OUT: 4349 * 0: invalid satype. 4350 */ 4351 static u_int16_t 4352 key_satype2proto(satype) 4353 u_int8_t satype; 4354 { 4355 switch (satype) { 4356 case SADB_SATYPE_UNSPEC: 4357 return IPSEC_PROTO_ANY; 4358 case SADB_SATYPE_AH: 4359 return IPPROTO_AH; 4360 case SADB_SATYPE_ESP: 4361 return IPPROTO_ESP; 4362 case SADB_X_SATYPE_IPCOMP: 4363 return IPPROTO_IPCOMP; 4364 default: 4365 return 0; 4366 } 4367 /* NOTREACHED */ 4368 } 4369 4370 /* 4371 * map IPPROTO_* to SADB_SATYPE_* 4372 * OUT: 4373 * 0: invalid protocol type. 4374 */ 4375 static u_int8_t 4376 key_proto2satype(proto) 4377 u_int16_t proto; 4378 { 4379 switch (proto) { 4380 case IPPROTO_AH: 4381 return SADB_SATYPE_AH; 4382 case IPPROTO_ESP: 4383 return SADB_SATYPE_ESP; 4384 case IPPROTO_IPCOMP: 4385 return SADB_X_SATYPE_IPCOMP; 4386 default: 4387 return 0; 4388 } 4389 /* NOTREACHED */ 4390 } 4391 4392 /* %%% PF_KEY */ 4393 /* 4394 * SADB_GETSPI processing is to receive 4395 * <base, (SA2), src address, dst address, (SPI range)> 4396 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4397 * tree with the status of LARVAL, and send 4398 * <base, SA(*), address(SD)> 4399 * to the IKMPd. 4400 * 4401 * IN: mhp: pointer to the pointer to each header. 4402 * OUT: NULL if fail. 4403 * other if success, return pointer to the message to send. 4404 */ 4405 static int 4406 key_getspi(so, m, mhp) 4407 struct socket *so; 4408 struct mbuf *m; 4409 const struct sadb_msghdr *mhp; 4410 { 4411 struct sadb_address *src0, *dst0; 4412 struct secasindex saidx; 4413 struct secashead *newsah; 4414 struct secasvar *newsav; 4415 u_int8_t proto; 4416 u_int32_t spi; 4417 u_int8_t mode; 4418 u_int32_t reqid; 4419 int error; 4420 4421 /* sanity check */ 4422 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4423 panic("key_getspi: NULL pointer is passed.\n"); 4424 4425 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4426 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4427 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4428 return key_senderror(so, m, EINVAL); 4429 } 4430 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4431 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4432 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4433 return key_senderror(so, m, EINVAL); 4434 } 4435 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4436 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4437 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4438 } else { 4439 mode = IPSEC_MODE_ANY; 4440 reqid = 0; 4441 } 4442 4443 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4444 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4445 4446 /* map satype to proto */ 4447 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4448 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4449 return key_senderror(so, m, EINVAL); 4450 } 4451 4452 /* make sure if port number is zero. */ 4453 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4454 case AF_INET: 4455 if (((struct sockaddr *)(src0 + 1))->sa_len != 4456 sizeof(struct sockaddr_in)) 4457 return key_senderror(so, m, EINVAL); 4458 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4459 break; 4460 case AF_INET6: 4461 if (((struct sockaddr *)(src0 + 1))->sa_len != 4462 sizeof(struct sockaddr_in6)) 4463 return key_senderror(so, m, EINVAL); 4464 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4465 break; 4466 default: 4467 ; /*???*/ 4468 } 4469 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4470 case AF_INET: 4471 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4472 sizeof(struct sockaddr_in)) 4473 return key_senderror(so, m, EINVAL); 4474 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4475 break; 4476 case AF_INET6: 4477 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4478 sizeof(struct sockaddr_in6)) 4479 return key_senderror(so, m, EINVAL); 4480 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4481 break; 4482 default: 4483 ; /*???*/ 4484 } 4485 4486 /* XXX boundary check against sa_len */ 4487 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4488 4489 /* SPI allocation */ 4490 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4491 &saidx); 4492 if (spi == 0) 4493 return key_senderror(so, m, EINVAL); 4494 4495 /* get a SA index */ 4496 if ((newsah = key_getsah(&saidx)) == NULL) { 4497 /* create a new SA index */ 4498 if ((newsah = key_newsah(&saidx)) == NULL) { 4499 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4500 return key_senderror(so, m, ENOBUFS); 4501 } 4502 } 4503 4504 /* get a new SA */ 4505 /* XXX rewrite */ 4506 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4507 if (newsav == NULL) { 4508 /* XXX don't free new SA index allocated in above. */ 4509 return key_senderror(so, m, error); 4510 } 4511 4512 /* set spi */ 4513 newsav->spi = htonl(spi); 4514 4515 #ifndef IPSEC_NONBLOCK_ACQUIRE 4516 /* delete the entry in acqtree */ 4517 if (mhp->msg->sadb_msg_seq != 0) { 4518 struct secacq *acq; 4519 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4520 /* reset counter in order to deletion by timehandler. */ 4521 acq->created = time_second; 4522 acq->count = 0; 4523 } 4524 } 4525 #endif 4526 4527 { 4528 struct mbuf *n, *nn; 4529 struct sadb_sa *m_sa; 4530 struct sadb_msg *newmsg; 4531 int off, len; 4532 4533 /* create new sadb_msg to reply. */ 4534 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4535 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4536 if (len > MCLBYTES) 4537 return key_senderror(so, m, ENOBUFS); 4538 4539 MGETHDR(n, M_DONTWAIT, MT_DATA); 4540 if (len > MHLEN) { 4541 MCLGET(n, M_DONTWAIT); 4542 if ((n->m_flags & M_EXT) == 0) { 4543 m_freem(n); 4544 n = NULL; 4545 } 4546 } 4547 if (!n) 4548 return key_senderror(so, m, ENOBUFS); 4549 4550 n->m_len = len; 4551 n->m_next = NULL; 4552 off = 0; 4553 4554 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4555 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4556 4557 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4558 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4559 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4560 m_sa->sadb_sa_spi = htonl(spi); 4561 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4562 4563 #ifdef DIAGNOSTIC 4564 if (off != len) 4565 panic("length inconsistency in key_getspi"); 4566 #endif 4567 4568 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4569 SADB_EXT_ADDRESS_DST); 4570 if (!n->m_next) { 4571 m_freem(n); 4572 return key_senderror(so, m, ENOBUFS); 4573 } 4574 4575 if (n->m_len < sizeof(struct sadb_msg)) { 4576 n = m_pullup(n, sizeof(struct sadb_msg)); 4577 if (n == NULL) 4578 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4579 } 4580 4581 n->m_pkthdr.len = 0; 4582 for (nn = n; nn; nn = nn->m_next) 4583 n->m_pkthdr.len += nn->m_len; 4584 4585 newmsg = mtod(n, struct sadb_msg *); 4586 newmsg->sadb_msg_seq = newsav->seq; 4587 newmsg->sadb_msg_errno = 0; 4588 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4589 4590 m_freem(m); 4591 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4592 } 4593 } 4594 4595 /* 4596 * allocating new SPI 4597 * called by key_getspi(). 4598 * OUT: 4599 * 0: failure. 4600 * others: success. 4601 */ 4602 static u_int32_t 4603 key_do_getnewspi(spirange, saidx) 4604 struct sadb_spirange *spirange; 4605 struct secasindex *saidx; 4606 { 4607 u_int32_t newspi; 4608 u_int32_t min, max; 4609 int count = key_spi_trycnt; 4610 4611 /* set spi range to allocate */ 4612 if (spirange != NULL) { 4613 min = spirange->sadb_spirange_min; 4614 max = spirange->sadb_spirange_max; 4615 } else { 4616 min = key_spi_minval; 4617 max = key_spi_maxval; 4618 } 4619 /* IPCOMP needs 2-byte SPI */ 4620 if (saidx->proto == IPPROTO_IPCOMP) { 4621 u_int32_t t; 4622 if (min >= 0x10000) 4623 min = 0xffff; 4624 if (max >= 0x10000) 4625 max = 0xffff; 4626 if (min > max) { 4627 t = min; min = max; max = t; 4628 } 4629 } 4630 4631 if (min == max) { 4632 if (key_checkspidup(saidx, min) != NULL) { 4633 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min)); 4634 return 0; 4635 } 4636 4637 count--; /* taking one cost. */ 4638 newspi = min; 4639 4640 } else { 4641 4642 /* init SPI */ 4643 newspi = 0; 4644 4645 /* when requesting to allocate spi ranged */ 4646 while (count--) { 4647 /* generate pseudo-random SPI value ranged. */ 4648 newspi = min + (key_random() % (max - min + 1)); 4649 4650 if (key_checkspidup(saidx, newspi) == NULL) 4651 break; 4652 } 4653 4654 if (count == 0 || newspi == 0) { 4655 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 4656 return 0; 4657 } 4658 } 4659 4660 /* statistics */ 4661 keystat.getspi_count = 4662 (keystat.getspi_count + key_spi_trycnt - count) / 2; 4663 4664 return newspi; 4665 } 4666 4667 /* 4668 * SADB_UPDATE processing 4669 * receive 4670 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4671 * key(AE), (identity(SD),) (sensitivity)> 4672 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4673 * and send 4674 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4675 * (identity(SD),) (sensitivity)> 4676 * to the ikmpd. 4677 * 4678 * m will always be freed. 4679 */ 4680 static int 4681 key_update(so, m, mhp) 4682 struct socket *so; 4683 struct mbuf *m; 4684 const struct sadb_msghdr *mhp; 4685 { 4686 struct sadb_sa *sa0; 4687 struct sadb_address *src0, *dst0; 4688 struct secasindex saidx; 4689 struct secashead *sah; 4690 struct secasvar *sav; 4691 u_int16_t proto; 4692 u_int8_t mode; 4693 u_int32_t reqid; 4694 int error; 4695 4696 /* sanity check */ 4697 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4698 panic("key_update: NULL pointer is passed.\n"); 4699 4700 /* map satype to proto */ 4701 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4702 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 4703 return key_senderror(so, m, EINVAL); 4704 } 4705 4706 if (mhp->ext[SADB_EXT_SA] == NULL || 4707 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4708 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4709 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4710 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4711 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4712 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4713 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4714 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4715 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4716 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4717 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4718 return key_senderror(so, m, EINVAL); 4719 } 4720 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4721 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4722 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4723 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4724 return key_senderror(so, m, EINVAL); 4725 } 4726 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4727 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4728 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4729 } else { 4730 mode = IPSEC_MODE_ANY; 4731 reqid = 0; 4732 } 4733 /* XXX boundary checking for other extensions */ 4734 4735 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4736 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4737 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4738 4739 /* XXX boundary check against sa_len */ 4740 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4741 4742 /* get a SA header */ 4743 if ((sah = key_getsah(&saidx)) == NULL) { 4744 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 4745 return key_senderror(so, m, ENOENT); 4746 } 4747 4748 /* set spidx if there */ 4749 /* XXX rewrite */ 4750 error = key_setident(sah, m, mhp); 4751 if (error) 4752 return key_senderror(so, m, error); 4753 4754 /* find a SA with sequence number. */ 4755 #ifdef IPSEC_DOSEQCHECK 4756 if (mhp->msg->sadb_msg_seq != 0 4757 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4758 ipseclog((LOG_DEBUG, 4759 "key_update: no larval SA with sequence %u exists.\n", 4760 mhp->msg->sadb_msg_seq)); 4761 return key_senderror(so, m, ENOENT); 4762 } 4763 #else 4764 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 4765 ipseclog((LOG_DEBUG, 4766 "key_update: no such a SA found (spi:%u)\n", 4767 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4768 return key_senderror(so, m, EINVAL); 4769 } 4770 #endif 4771 4772 /* validity check */ 4773 if (sav->sah->saidx.proto != proto) { 4774 ipseclog((LOG_DEBUG, 4775 "key_update: protocol mismatched (DB=%u param=%u)\n", 4776 sav->sah->saidx.proto, proto)); 4777 return key_senderror(so, m, EINVAL); 4778 } 4779 #ifdef IPSEC_DOSEQCHECK 4780 if (sav->spi != sa0->sadb_sa_spi) { 4781 ipseclog((LOG_DEBUG, 4782 "key_update: SPI mismatched (DB:%u param:%u)\n", 4783 (u_int32_t)ntohl(sav->spi), 4784 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4785 return key_senderror(so, m, EINVAL); 4786 } 4787 #endif 4788 if (sav->pid != mhp->msg->sadb_msg_pid) { 4789 ipseclog((LOG_DEBUG, 4790 "key_update: pid mismatched (DB:%u param:%u)\n", 4791 sav->pid, mhp->msg->sadb_msg_pid)); 4792 return key_senderror(so, m, EINVAL); 4793 } 4794 4795 /* copy sav values */ 4796 error = key_setsaval(sav, m, mhp); 4797 if (error) { 4798 KEY_FREESAV(&sav); 4799 return key_senderror(so, m, error); 4800 } 4801 4802 /* check SA values to be mature. */ 4803 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 4804 KEY_FREESAV(&sav); 4805 return key_senderror(so, m, 0); 4806 } 4807 4808 { 4809 struct mbuf *n; 4810 4811 /* set msg buf from mhp */ 4812 n = key_getmsgbuf_x1(m, mhp); 4813 if (n == NULL) { 4814 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 4815 return key_senderror(so, m, ENOBUFS); 4816 } 4817 4818 m_freem(m); 4819 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4820 } 4821 } 4822 4823 /* 4824 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 4825 * only called by key_update(). 4826 * OUT: 4827 * NULL : not found 4828 * others : found, pointer to a SA. 4829 */ 4830 #ifdef IPSEC_DOSEQCHECK 4831 static struct secasvar * 4832 key_getsavbyseq(sah, seq) 4833 struct secashead *sah; 4834 u_int32_t seq; 4835 { 4836 struct secasvar *sav; 4837 u_int state; 4838 4839 state = SADB_SASTATE_LARVAL; 4840 4841 /* search SAD with sequence number ? */ 4842 LIST_FOREACH(sav, &sah->savtree[state], chain) { 4843 4844 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 4845 4846 if (sav->seq == seq) { 4847 SA_ADDREF(sav); 4848 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 4849 printf("DP key_getsavbyseq cause " 4850 "refcnt++:%d SA:%p\n", 4851 sav->refcnt, sav)); 4852 return sav; 4853 } 4854 } 4855 4856 return NULL; 4857 } 4858 #endif 4859 4860 /* 4861 * SADB_ADD processing 4862 * add an entry to SA database, when received 4863 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4864 * key(AE), (identity(SD),) (sensitivity)> 4865 * from the ikmpd, 4866 * and send 4867 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4868 * (identity(SD),) (sensitivity)> 4869 * to the ikmpd. 4870 * 4871 * IGNORE identity and sensitivity messages. 4872 * 4873 * m will always be freed. 4874 */ 4875 static int 4876 key_add(so, m, mhp) 4877 struct socket *so; 4878 struct mbuf *m; 4879 const struct sadb_msghdr *mhp; 4880 { 4881 struct sadb_sa *sa0; 4882 struct sadb_address *src0, *dst0; 4883 struct secasindex saidx; 4884 struct secashead *newsah; 4885 struct secasvar *newsav; 4886 u_int16_t proto; 4887 u_int8_t mode; 4888 u_int32_t reqid; 4889 int error; 4890 4891 /* sanity check */ 4892 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4893 panic("key_add: NULL pointer is passed.\n"); 4894 4895 /* map satype to proto */ 4896 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4897 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 4898 return key_senderror(so, m, EINVAL); 4899 } 4900 4901 if (mhp->ext[SADB_EXT_SA] == NULL || 4902 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4903 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4904 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4905 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4906 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4907 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4908 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4909 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4910 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4911 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4912 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 4913 return key_senderror(so, m, EINVAL); 4914 } 4915 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4916 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4917 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4918 /* XXX need more */ 4919 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 4920 return key_senderror(so, m, EINVAL); 4921 } 4922 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4923 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4924 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4925 } else { 4926 mode = IPSEC_MODE_ANY; 4927 reqid = 0; 4928 } 4929 4930 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4931 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4932 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4933 4934 /* XXX boundary check against sa_len */ 4935 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4936 4937 /* get a SA header */ 4938 if ((newsah = key_getsah(&saidx)) == NULL) { 4939 /* create a new SA header */ 4940 if ((newsah = key_newsah(&saidx)) == NULL) { 4941 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 4942 return key_senderror(so, m, ENOBUFS); 4943 } 4944 } 4945 4946 /* set spidx if there */ 4947 /* XXX rewrite */ 4948 error = key_setident(newsah, m, mhp); 4949 if (error) { 4950 return key_senderror(so, m, error); 4951 } 4952 4953 /* create new SA entry. */ 4954 /* We can create new SA only if SPI is differenct. */ 4955 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 4956 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 4957 return key_senderror(so, m, EEXIST); 4958 } 4959 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4960 if (newsav == NULL) { 4961 return key_senderror(so, m, error); 4962 } 4963 4964 /* check SA values to be mature. */ 4965 if ((error = key_mature(newsav)) != 0) { 4966 KEY_FREESAV(&newsav); 4967 return key_senderror(so, m, error); 4968 } 4969 4970 /* 4971 * don't call key_freesav() here, as we would like to keep the SA 4972 * in the database on success. 4973 */ 4974 4975 { 4976 struct mbuf *n; 4977 4978 /* set msg buf from mhp */ 4979 n = key_getmsgbuf_x1(m, mhp); 4980 if (n == NULL) { 4981 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 4982 return key_senderror(so, m, ENOBUFS); 4983 } 4984 4985 m_freem(m); 4986 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4987 } 4988 } 4989 4990 /* m is retained */ 4991 static int 4992 key_setident(sah, m, mhp) 4993 struct secashead *sah; 4994 struct mbuf *m; 4995 const struct sadb_msghdr *mhp; 4996 { 4997 const struct sadb_ident *idsrc, *iddst; 4998 int idsrclen, iddstlen; 4999 5000 /* sanity check */ 5001 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5002 panic("key_setident: NULL pointer is passed.\n"); 5003 5004 /* don't make buffer if not there */ 5005 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5006 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5007 sah->idents = NULL; 5008 sah->identd = NULL; 5009 return 0; 5010 } 5011 5012 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5013 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5014 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5015 return EINVAL; 5016 } 5017 5018 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5019 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5020 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5021 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5022 5023 /* validity check */ 5024 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5025 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5026 return EINVAL; 5027 } 5028 5029 switch (idsrc->sadb_ident_type) { 5030 case SADB_IDENTTYPE_PREFIX: 5031 case SADB_IDENTTYPE_FQDN: 5032 case SADB_IDENTTYPE_USERFQDN: 5033 default: 5034 /* XXX do nothing */ 5035 sah->idents = NULL; 5036 sah->identd = NULL; 5037 return 0; 5038 } 5039 5040 /* make structure */ 5041 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5042 if (sah->idents == NULL) { 5043 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5044 return ENOBUFS; 5045 } 5046 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5047 if (sah->identd == NULL) { 5048 KFREE(sah->idents); 5049 sah->idents = NULL; 5050 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5051 return ENOBUFS; 5052 } 5053 bcopy(idsrc, sah->idents, idsrclen); 5054 bcopy(iddst, sah->identd, iddstlen); 5055 5056 return 0; 5057 } 5058 5059 /* 5060 * m will not be freed on return. 5061 * it is caller's responsibility to free the result. 5062 */ 5063 static struct mbuf * 5064 key_getmsgbuf_x1(m, mhp) 5065 struct mbuf *m; 5066 const struct sadb_msghdr *mhp; 5067 { 5068 struct mbuf *n; 5069 5070 /* sanity check */ 5071 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5072 panic("key_getmsgbuf_x1: NULL pointer is passed.\n"); 5073 5074 /* create new sadb_msg to reply. */ 5075 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5076 SADB_EXT_SA, SADB_X_EXT_SA2, 5077 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5078 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5079 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5080 if (!n) 5081 return NULL; 5082 5083 if (n->m_len < sizeof(struct sadb_msg)) { 5084 n = m_pullup(n, sizeof(struct sadb_msg)); 5085 if (n == NULL) 5086 return NULL; 5087 } 5088 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5089 mtod(n, struct sadb_msg *)->sadb_msg_len = 5090 PFKEY_UNIT64(n->m_pkthdr.len); 5091 5092 return n; 5093 } 5094 5095 static int key_delete_all __P((struct socket *, struct mbuf *, 5096 const struct sadb_msghdr *, u_int16_t)); 5097 5098 /* 5099 * SADB_DELETE processing 5100 * receive 5101 * <base, SA(*), address(SD)> 5102 * from the ikmpd, and set SADB_SASTATE_DEAD, 5103 * and send, 5104 * <base, SA(*), address(SD)> 5105 * to the ikmpd. 5106 * 5107 * m will always be freed. 5108 */ 5109 static int 5110 key_delete(so, m, mhp) 5111 struct socket *so; 5112 struct mbuf *m; 5113 const struct sadb_msghdr *mhp; 5114 { 5115 struct sadb_sa *sa0; 5116 struct sadb_address *src0, *dst0; 5117 struct secasindex saidx; 5118 struct secashead *sah; 5119 struct secasvar *sav = NULL; 5120 u_int16_t proto; 5121 5122 /* sanity check */ 5123 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5124 panic("key_delete: NULL pointer is passed.\n"); 5125 5126 /* map satype to proto */ 5127 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5128 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5129 return key_senderror(so, m, EINVAL); 5130 } 5131 5132 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5133 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5134 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5135 return key_senderror(so, m, EINVAL); 5136 } 5137 5138 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5139 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5140 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5141 return key_senderror(so, m, EINVAL); 5142 } 5143 5144 if (mhp->ext[SADB_EXT_SA] == NULL) { 5145 /* 5146 * Caller wants us to delete all non-LARVAL SAs 5147 * that match the src/dst. This is used during 5148 * IKE INITIAL-CONTACT. 5149 */ 5150 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5151 return key_delete_all(so, m, mhp, proto); 5152 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5153 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5154 return key_senderror(so, m, EINVAL); 5155 } 5156 5157 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5158 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5159 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5160 5161 /* XXX boundary check against sa_len */ 5162 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5163 5164 /* get a SA header */ 5165 LIST_FOREACH(sah, &sahtree, chain) { 5166 if (sah->state == SADB_SASTATE_DEAD) 5167 continue; 5168 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5169 continue; 5170 5171 /* get a SA with SPI. */ 5172 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5173 if (sav) 5174 break; 5175 } 5176 if (sah == NULL) { 5177 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5178 return key_senderror(so, m, ENOENT); 5179 } 5180 5181 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5182 KEY_FREESAV(&sav); 5183 5184 { 5185 struct mbuf *n; 5186 struct sadb_msg *newmsg; 5187 5188 /* create new sadb_msg to reply. */ 5189 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5190 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5191 if (!n) 5192 return key_senderror(so, m, ENOBUFS); 5193 5194 if (n->m_len < sizeof(struct sadb_msg)) { 5195 n = m_pullup(n, sizeof(struct sadb_msg)); 5196 if (n == NULL) 5197 return key_senderror(so, m, ENOBUFS); 5198 } 5199 newmsg = mtod(n, struct sadb_msg *); 5200 newmsg->sadb_msg_errno = 0; 5201 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5202 5203 m_freem(m); 5204 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5205 } 5206 } 5207 5208 /* 5209 * delete all SAs for src/dst. Called from key_delete(). 5210 */ 5211 static int 5212 key_delete_all(so, m, mhp, proto) 5213 struct socket *so; 5214 struct mbuf *m; 5215 const struct sadb_msghdr *mhp; 5216 u_int16_t proto; 5217 { 5218 struct sadb_address *src0, *dst0; 5219 struct secasindex saidx; 5220 struct secashead *sah; 5221 struct secasvar *sav, *nextsav; 5222 u_int stateidx, state; 5223 5224 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5225 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5226 5227 /* XXX boundary check against sa_len */ 5228 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5229 5230 LIST_FOREACH(sah, &sahtree, chain) { 5231 if (sah->state == SADB_SASTATE_DEAD) 5232 continue; 5233 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5234 continue; 5235 5236 /* Delete all non-LARVAL SAs. */ 5237 for (stateidx = 0; 5238 stateidx < _ARRAYLEN(saorder_state_alive); 5239 stateidx++) { 5240 state = saorder_state_alive[stateidx]; 5241 if (state == SADB_SASTATE_LARVAL) 5242 continue; 5243 for (sav = LIST_FIRST(&sah->savtree[state]); 5244 sav != NULL; sav = nextsav) { 5245 nextsav = LIST_NEXT(sav, chain); 5246 /* sanity check */ 5247 if (sav->state != state) { 5248 ipseclog((LOG_DEBUG, "key_delete_all: " 5249 "invalid sav->state " 5250 "(queue: %d SA: %d)\n", 5251 state, sav->state)); 5252 continue; 5253 } 5254 5255 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5256 KEY_FREESAV(&sav); 5257 } 5258 } 5259 } 5260 { 5261 struct mbuf *n; 5262 struct sadb_msg *newmsg; 5263 5264 /* create new sadb_msg to reply. */ 5265 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5266 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5267 if (!n) 5268 return key_senderror(so, m, ENOBUFS); 5269 5270 if (n->m_len < sizeof(struct sadb_msg)) { 5271 n = m_pullup(n, sizeof(struct sadb_msg)); 5272 if (n == NULL) 5273 return key_senderror(so, m, ENOBUFS); 5274 } 5275 newmsg = mtod(n, struct sadb_msg *); 5276 newmsg->sadb_msg_errno = 0; 5277 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5278 5279 m_freem(m); 5280 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5281 } 5282 } 5283 5284 /* 5285 * SADB_GET processing 5286 * receive 5287 * <base, SA(*), address(SD)> 5288 * from the ikmpd, and get a SP and a SA to respond, 5289 * and send, 5290 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5291 * (identity(SD),) (sensitivity)> 5292 * to the ikmpd. 5293 * 5294 * m will always be freed. 5295 */ 5296 static int 5297 key_get(so, m, mhp) 5298 struct socket *so; 5299 struct mbuf *m; 5300 const struct sadb_msghdr *mhp; 5301 { 5302 struct sadb_sa *sa0; 5303 struct sadb_address *src0, *dst0; 5304 struct secasindex saidx; 5305 struct secashead *sah; 5306 struct secasvar *sav = NULL; 5307 u_int16_t proto; 5308 5309 /* sanity check */ 5310 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5311 panic("key_get: NULL pointer is passed.\n"); 5312 5313 /* map satype to proto */ 5314 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5315 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5316 return key_senderror(so, m, EINVAL); 5317 } 5318 5319 if (mhp->ext[SADB_EXT_SA] == NULL || 5320 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5321 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5322 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5323 return key_senderror(so, m, EINVAL); 5324 } 5325 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5326 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5327 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5328 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5329 return key_senderror(so, m, EINVAL); 5330 } 5331 5332 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5333 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5334 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5335 5336 /* XXX boundary check against sa_len */ 5337 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5338 5339 /* get a SA header */ 5340 LIST_FOREACH(sah, &sahtree, chain) { 5341 if (sah->state == SADB_SASTATE_DEAD) 5342 continue; 5343 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5344 continue; 5345 5346 /* get a SA with SPI. */ 5347 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5348 if (sav) 5349 break; 5350 } 5351 if (sah == NULL) { 5352 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5353 return key_senderror(so, m, ENOENT); 5354 } 5355 5356 { 5357 struct mbuf *n; 5358 u_int8_t satype; 5359 5360 /* map proto to satype */ 5361 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5362 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5363 return key_senderror(so, m, EINVAL); 5364 } 5365 5366 /* create new sadb_msg to reply. */ 5367 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5368 mhp->msg->sadb_msg_pid); 5369 if (!n) 5370 return key_senderror(so, m, ENOBUFS); 5371 5372 m_freem(m); 5373 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5374 } 5375 } 5376 5377 /* XXX make it sysctl-configurable? */ 5378 static void 5379 key_getcomb_setlifetime(comb) 5380 struct sadb_comb *comb; 5381 { 5382 5383 comb->sadb_comb_soft_allocations = 1; 5384 comb->sadb_comb_hard_allocations = 1; 5385 comb->sadb_comb_soft_bytes = 0; 5386 comb->sadb_comb_hard_bytes = 0; 5387 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5388 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5389 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5390 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5391 } 5392 5393 /* 5394 * XXX reorder combinations by preference 5395 * XXX no idea if the user wants ESP authentication or not 5396 */ 5397 static struct mbuf * 5398 key_getcomb_esp() 5399 { 5400 struct sadb_comb *comb; 5401 struct enc_xform *algo; 5402 struct mbuf *result = NULL, *m, *n; 5403 int encmin; 5404 int i, off, o; 5405 int totlen; 5406 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5407 5408 m = NULL; 5409 for (i = 1; i <= SADB_EALG_MAX; i++) { 5410 algo = esp_algorithm_lookup(i); 5411 if (algo == NULL) 5412 continue; 5413 5414 /* discard algorithms with key size smaller than system min */ 5415 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5416 continue; 5417 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5418 encmin = ipsec_esp_keymin; 5419 else 5420 encmin = _BITS(algo->minkey); 5421 5422 if (ipsec_esp_auth) 5423 m = key_getcomb_ah(); 5424 else { 5425 IPSEC_ASSERT(l <= MLEN, 5426 ("key_getcomb_esp: l=%u > MLEN=%lu", 5427 l, (u_long) MLEN)); 5428 MGET(m, M_DONTWAIT, MT_DATA); 5429 if (m) { 5430 M_ALIGN(m, l); 5431 m->m_len = l; 5432 m->m_next = NULL; 5433 bzero(mtod(m, caddr_t), m->m_len); 5434 } 5435 } 5436 if (!m) 5437 goto fail; 5438 5439 totlen = 0; 5440 for (n = m; n; n = n->m_next) 5441 totlen += n->m_len; 5442 IPSEC_ASSERT((totlen % l) == 0, 5443 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5444 5445 for (off = 0; off < totlen; off += l) { 5446 n = m_pulldown(m, off, l, &o); 5447 if (!n) { 5448 /* m is already freed */ 5449 goto fail; 5450 } 5451 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5452 bzero(comb, sizeof(*comb)); 5453 key_getcomb_setlifetime(comb); 5454 comb->sadb_comb_encrypt = i; 5455 comb->sadb_comb_encrypt_minbits = encmin; 5456 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5457 } 5458 5459 if (!result) 5460 result = m; 5461 else 5462 m_cat(result, m); 5463 } 5464 5465 return result; 5466 5467 fail: 5468 if (result) 5469 m_freem(result); 5470 return NULL; 5471 } 5472 5473 static void 5474 key_getsizes_ah( 5475 const struct auth_hash *ah, 5476 int alg, 5477 u_int16_t* min, 5478 u_int16_t* max) 5479 { 5480 *min = *max = ah->keysize; 5481 if (ah->keysize == 0) { 5482 /* 5483 * Transform takes arbitrary key size but algorithm 5484 * key size is restricted. Enforce this here. 5485 */ 5486 switch (alg) { 5487 case SADB_X_AALG_MD5: *min = *max = 16; break; 5488 case SADB_X_AALG_SHA: *min = *max = 20; break; 5489 case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 5490 default: 5491 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5492 alg)); 5493 break; 5494 } 5495 } 5496 } 5497 5498 /* 5499 * XXX reorder combinations by preference 5500 */ 5501 static struct mbuf * 5502 key_getcomb_ah() 5503 { 5504 struct sadb_comb *comb; 5505 struct auth_hash *algo; 5506 struct mbuf *m; 5507 u_int16_t minkeysize, maxkeysize; 5508 int i; 5509 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5510 5511 m = NULL; 5512 for (i = 1; i <= SADB_AALG_MAX; i++) { 5513 #if 1 5514 /* we prefer HMAC algorithms, not old algorithms */ 5515 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5516 continue; 5517 #endif 5518 algo = ah_algorithm_lookup(i); 5519 if (!algo) 5520 continue; 5521 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5522 /* discard algorithms with key size smaller than system min */ 5523 if (_BITS(minkeysize) < ipsec_ah_keymin) 5524 continue; 5525 5526 if (!m) { 5527 IPSEC_ASSERT(l <= MLEN, 5528 ("key_getcomb_ah: l=%u > MLEN=%lu", 5529 l, (u_long) MLEN)); 5530 MGET(m, M_DONTWAIT, MT_DATA); 5531 if (m) { 5532 M_ALIGN(m, l); 5533 m->m_len = l; 5534 m->m_next = NULL; 5535 } 5536 } else 5537 M_PREPEND(m, l, M_DONTWAIT); 5538 if (!m) 5539 return NULL; 5540 5541 comb = mtod(m, struct sadb_comb *); 5542 bzero(comb, sizeof(*comb)); 5543 key_getcomb_setlifetime(comb); 5544 comb->sadb_comb_auth = i; 5545 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5546 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5547 } 5548 5549 return m; 5550 } 5551 5552 /* 5553 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 5554 * XXX reorder combinations by preference 5555 */ 5556 static struct mbuf * 5557 key_getcomb_ipcomp() 5558 { 5559 struct sadb_comb *comb; 5560 struct comp_algo *algo; 5561 struct mbuf *m; 5562 int i; 5563 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5564 5565 m = NULL; 5566 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5567 algo = ipcomp_algorithm_lookup(i); 5568 if (!algo) 5569 continue; 5570 5571 if (!m) { 5572 IPSEC_ASSERT(l <= MLEN, 5573 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 5574 l, (u_long) MLEN)); 5575 MGET(m, M_DONTWAIT, MT_DATA); 5576 if (m) { 5577 M_ALIGN(m, l); 5578 m->m_len = l; 5579 m->m_next = NULL; 5580 } 5581 } else 5582 M_PREPEND(m, l, M_DONTWAIT); 5583 if (!m) 5584 return NULL; 5585 5586 comb = mtod(m, struct sadb_comb *); 5587 bzero(comb, sizeof(*comb)); 5588 key_getcomb_setlifetime(comb); 5589 comb->sadb_comb_encrypt = i; 5590 /* what should we set into sadb_comb_*_{min,max}bits? */ 5591 } 5592 5593 return m; 5594 } 5595 5596 /* 5597 * XXX no way to pass mode (transport/tunnel) to userland 5598 * XXX replay checking? 5599 * XXX sysctl interface to ipsec_{ah,esp}_keymin 5600 */ 5601 static struct mbuf * 5602 key_getprop(saidx) 5603 const struct secasindex *saidx; 5604 { 5605 struct sadb_prop *prop; 5606 struct mbuf *m, *n; 5607 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5608 int totlen; 5609 5610 switch (saidx->proto) { 5611 case IPPROTO_ESP: 5612 m = key_getcomb_esp(); 5613 break; 5614 case IPPROTO_AH: 5615 m = key_getcomb_ah(); 5616 break; 5617 case IPPROTO_IPCOMP: 5618 m = key_getcomb_ipcomp(); 5619 break; 5620 default: 5621 return NULL; 5622 } 5623 5624 if (!m) 5625 return NULL; 5626 M_PREPEND(m, l, M_DONTWAIT); 5627 if (!m) 5628 return NULL; 5629 5630 totlen = 0; 5631 for (n = m; n; n = n->m_next) 5632 totlen += n->m_len; 5633 5634 prop = mtod(m, struct sadb_prop *); 5635 bzero(prop, sizeof(*prop)); 5636 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5637 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5638 prop->sadb_prop_replay = 32; /* XXX */ 5639 5640 return m; 5641 } 5642 5643 /* 5644 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5645 * send 5646 * <base, SA, address(SD), (address(P)), x_policy, 5647 * (identity(SD),) (sensitivity,) proposal> 5648 * to KMD, and expect to receive 5649 * <base> with SADB_ACQUIRE if error occurred, 5650 * or 5651 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5652 * from KMD by PF_KEY. 5653 * 5654 * XXX x_policy is outside of RFC2367 (KAME extension). 5655 * XXX sensitivity is not supported. 5656 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5657 * see comment for key_getcomb_ipcomp(). 5658 * 5659 * OUT: 5660 * 0 : succeed 5661 * others: error number 5662 */ 5663 static int 5664 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5665 { 5666 struct mbuf *result = NULL, *m; 5667 #ifndef IPSEC_NONBLOCK_ACQUIRE 5668 struct secacq *newacq; 5669 #endif 5670 u_int8_t satype; 5671 int error = -1; 5672 u_int32_t seq; 5673 5674 /* sanity check */ 5675 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 5676 satype = key_proto2satype(saidx->proto); 5677 IPSEC_ASSERT(satype != 0, 5678 ("key_acquire: null satype, protocol %u", saidx->proto)); 5679 5680 #ifndef IPSEC_NONBLOCK_ACQUIRE 5681 /* 5682 * We never do anything about acquirng SA. There is anather 5683 * solution that kernel blocks to send SADB_ACQUIRE message until 5684 * getting something message from IKEd. In later case, to be 5685 * managed with ACQUIRING list. 5686 */ 5687 /* Get an entry to check whether sending message or not. */ 5688 if ((newacq = key_getacq(saidx)) != NULL) { 5689 if (key_blockacq_count < newacq->count) { 5690 /* reset counter and do send message. */ 5691 newacq->count = 0; 5692 } else { 5693 /* increment counter and do nothing. */ 5694 newacq->count++; 5695 return 0; 5696 } 5697 } else { 5698 /* make new entry for blocking to send SADB_ACQUIRE. */ 5699 if ((newacq = key_newacq(saidx)) == NULL) 5700 return ENOBUFS; 5701 5702 /* add to acqtree */ 5703 LIST_INSERT_HEAD(&acqtree, newacq, chain); 5704 } 5705 #endif 5706 5707 5708 #ifndef IPSEC_NONBLOCK_ACQUIRE 5709 seq = newacq->seq; 5710 #else 5711 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 5712 #endif 5713 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5714 if (!m) { 5715 error = ENOBUFS; 5716 goto fail; 5717 } 5718 result = m; 5719 5720 /* set sadb_address for saidx's. */ 5721 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5722 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5723 if (!m) { 5724 error = ENOBUFS; 5725 goto fail; 5726 } 5727 m_cat(result, m); 5728 5729 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5730 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5731 if (!m) { 5732 error = ENOBUFS; 5733 goto fail; 5734 } 5735 m_cat(result, m); 5736 5737 /* XXX proxy address (optional) */ 5738 5739 /* set sadb_x_policy */ 5740 if (sp) { 5741 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5742 if (!m) { 5743 error = ENOBUFS; 5744 goto fail; 5745 } 5746 m_cat(result, m); 5747 } 5748 5749 /* XXX identity (optional) */ 5750 #if 0 5751 if (idexttype && fqdn) { 5752 /* create identity extension (FQDN) */ 5753 struct sadb_ident *id; 5754 int fqdnlen; 5755 5756 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5757 id = (struct sadb_ident *)p; 5758 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5759 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5760 id->sadb_ident_exttype = idexttype; 5761 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5762 bcopy(fqdn, id + 1, fqdnlen); 5763 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5764 } 5765 5766 if (idexttype) { 5767 /* create identity extension (USERFQDN) */ 5768 struct sadb_ident *id; 5769 int userfqdnlen; 5770 5771 if (userfqdn) { 5772 /* +1 for terminating-NUL */ 5773 userfqdnlen = strlen(userfqdn) + 1; 5774 } else 5775 userfqdnlen = 0; 5776 id = (struct sadb_ident *)p; 5777 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5778 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5779 id->sadb_ident_exttype = idexttype; 5780 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5781 /* XXX is it correct? */ 5782 if (curproc && curproc->p_cred) 5783 id->sadb_ident_id = curproc->p_cred->p_ruid; 5784 if (userfqdn && userfqdnlen) 5785 bcopy(userfqdn, id + 1, userfqdnlen); 5786 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5787 } 5788 #endif 5789 5790 /* XXX sensitivity (optional) */ 5791 5792 /* create proposal/combination extension */ 5793 m = key_getprop(saidx); 5794 #if 0 5795 /* 5796 * spec conformant: always attach proposal/combination extension, 5797 * the problem is that we have no way to attach it for ipcomp, 5798 * due to the way sadb_comb is declared in RFC2367. 5799 */ 5800 if (!m) { 5801 error = ENOBUFS; 5802 goto fail; 5803 } 5804 m_cat(result, m); 5805 #else 5806 /* 5807 * outside of spec; make proposal/combination extension optional. 5808 */ 5809 if (m) 5810 m_cat(result, m); 5811 #endif 5812 5813 if ((result->m_flags & M_PKTHDR) == 0) { 5814 error = EINVAL; 5815 goto fail; 5816 } 5817 5818 if (result->m_len < sizeof(struct sadb_msg)) { 5819 result = m_pullup(result, sizeof(struct sadb_msg)); 5820 if (result == NULL) { 5821 error = ENOBUFS; 5822 goto fail; 5823 } 5824 } 5825 5826 result->m_pkthdr.len = 0; 5827 for (m = result; m; m = m->m_next) 5828 result->m_pkthdr.len += m->m_len; 5829 5830 mtod(result, struct sadb_msg *)->sadb_msg_len = 5831 PFKEY_UNIT64(result->m_pkthdr.len); 5832 5833 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 5834 5835 fail: 5836 if (result) 5837 m_freem(result); 5838 return error; 5839 } 5840 5841 #ifndef IPSEC_NONBLOCK_ACQUIRE 5842 static struct secacq * 5843 key_newacq(const struct secasindex *saidx) 5844 { 5845 struct secacq *newacq; 5846 5847 /* get new entry */ 5848 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 5849 if (newacq == NULL) { 5850 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 5851 return NULL; 5852 } 5853 bzero(newacq, sizeof(*newacq)); 5854 5855 /* copy secindex */ 5856 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 5857 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 5858 newacq->created = time_second; 5859 newacq->count = 0; 5860 5861 return newacq; 5862 } 5863 5864 static struct secacq * 5865 key_getacq(const struct secasindex *saidx) 5866 { 5867 struct secacq *acq; 5868 5869 LIST_FOREACH(acq, &acqtree, chain) { 5870 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 5871 return acq; 5872 } 5873 5874 return NULL; 5875 } 5876 5877 static struct secacq * 5878 key_getacqbyseq(seq) 5879 u_int32_t seq; 5880 { 5881 struct secacq *acq; 5882 5883 LIST_FOREACH(acq, &acqtree, chain) { 5884 if (acq->seq == seq) 5885 return acq; 5886 } 5887 5888 return NULL; 5889 } 5890 #endif 5891 5892 static struct secspacq * 5893 key_newspacq(spidx) 5894 struct secpolicyindex *spidx; 5895 { 5896 struct secspacq *acq; 5897 5898 /* get new entry */ 5899 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 5900 if (acq == NULL) { 5901 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 5902 return NULL; 5903 } 5904 bzero(acq, sizeof(*acq)); 5905 5906 /* copy secindex */ 5907 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 5908 acq->created = time_second; 5909 acq->count = 0; 5910 5911 return acq; 5912 } 5913 5914 static struct secspacq * 5915 key_getspacq(spidx) 5916 struct secpolicyindex *spidx; 5917 { 5918 struct secspacq *acq; 5919 5920 LIST_FOREACH(acq, &spacqtree, chain) { 5921 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 5922 return acq; 5923 } 5924 5925 return NULL; 5926 } 5927 5928 /* 5929 * SADB_ACQUIRE processing, 5930 * in first situation, is receiving 5931 * <base> 5932 * from the ikmpd, and clear sequence of its secasvar entry. 5933 * 5934 * In second situation, is receiving 5935 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 5936 * from a user land process, and return 5937 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 5938 * to the socket. 5939 * 5940 * m will always be freed. 5941 */ 5942 static int 5943 key_acquire2(so, m, mhp) 5944 struct socket *so; 5945 struct mbuf *m; 5946 const struct sadb_msghdr *mhp; 5947 { 5948 const struct sadb_address *src0, *dst0; 5949 struct secasindex saidx; 5950 struct secashead *sah; 5951 u_int16_t proto; 5952 int error; 5953 5954 /* sanity check */ 5955 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5956 panic("key_acquire2: NULL pointer is passed.\n"); 5957 5958 /* 5959 * Error message from KMd. 5960 * We assume that if error was occurred in IKEd, the length of PFKEY 5961 * message is equal to the size of sadb_msg structure. 5962 * We do not raise error even if error occurred in this function. 5963 */ 5964 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 5965 #ifndef IPSEC_NONBLOCK_ACQUIRE 5966 struct secacq *acq; 5967 5968 /* check sequence number */ 5969 if (mhp->msg->sadb_msg_seq == 0) { 5970 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 5971 m_freem(m); 5972 return 0; 5973 } 5974 5975 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 5976 /* 5977 * the specified larval SA is already gone, or we got 5978 * a bogus sequence number. we can silently ignore it. 5979 */ 5980 m_freem(m); 5981 return 0; 5982 } 5983 5984 /* reset acq counter in order to deletion by timehander. */ 5985 acq->created = time_second; 5986 acq->count = 0; 5987 #endif 5988 m_freem(m); 5989 return 0; 5990 } 5991 5992 /* 5993 * This message is from user land. 5994 */ 5995 5996 /* map satype to proto */ 5997 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5998 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 5999 return key_senderror(so, m, EINVAL); 6000 } 6001 6002 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6003 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6004 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6005 /* error */ 6006 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6007 return key_senderror(so, m, EINVAL); 6008 } 6009 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6010 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6011 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6012 /* error */ 6013 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6014 return key_senderror(so, m, EINVAL); 6015 } 6016 6017 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6018 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6019 6020 /* XXX boundary check against sa_len */ 6021 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6022 6023 /* get a SA index */ 6024 LIST_FOREACH(sah, &sahtree, chain) { 6025 if (sah->state == SADB_SASTATE_DEAD) 6026 continue; 6027 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6028 break; 6029 } 6030 if (sah != NULL) { 6031 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6032 return key_senderror(so, m, EEXIST); 6033 } 6034 6035 error = key_acquire(&saidx, NULL); 6036 if (error != 0) { 6037 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6038 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6039 return key_senderror(so, m, error); 6040 } 6041 6042 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6043 } 6044 6045 /* 6046 * SADB_REGISTER processing. 6047 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6048 * receive 6049 * <base> 6050 * from the ikmpd, and register a socket to send PF_KEY messages, 6051 * and send 6052 * <base, supported> 6053 * to KMD by PF_KEY. 6054 * If socket is detached, must free from regnode. 6055 * 6056 * m will always be freed. 6057 */ 6058 static int 6059 key_register(so, m, mhp) 6060 struct socket *so; 6061 struct mbuf *m; 6062 const struct sadb_msghdr *mhp; 6063 { 6064 struct secreg *reg, *newreg = 0; 6065 6066 /* sanity check */ 6067 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6068 panic("key_register: NULL pointer is passed.\n"); 6069 6070 /* check for invalid register message */ 6071 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6072 return key_senderror(so, m, EINVAL); 6073 6074 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6075 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6076 goto setmsg; 6077 6078 /* check whether existing or not */ 6079 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6080 if (reg->so == so) { 6081 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6082 return key_senderror(so, m, EEXIST); 6083 } 6084 } 6085 6086 /* create regnode */ 6087 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6088 if (newreg == NULL) { 6089 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6090 return key_senderror(so, m, ENOBUFS); 6091 } 6092 bzero((caddr_t)newreg, sizeof(*newreg)); 6093 6094 newreg->so = so; 6095 ((struct keycb *)sotorawcb(so))->kp_registered++; 6096 6097 /* add regnode to regtree. */ 6098 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6099 6100 setmsg: 6101 { 6102 struct mbuf *n; 6103 struct sadb_msg *newmsg; 6104 struct sadb_supported *sup; 6105 u_int len, alen, elen; 6106 int off; 6107 int i; 6108 struct sadb_alg *alg; 6109 6110 /* create new sadb_msg to reply. */ 6111 alen = 0; 6112 for (i = 1; i <= SADB_AALG_MAX; i++) { 6113 if (ah_algorithm_lookup(i)) 6114 alen += sizeof(struct sadb_alg); 6115 } 6116 if (alen) 6117 alen += sizeof(struct sadb_supported); 6118 elen = 0; 6119 for (i = 1; i <= SADB_EALG_MAX; i++) { 6120 if (esp_algorithm_lookup(i)) 6121 elen += sizeof(struct sadb_alg); 6122 } 6123 if (elen) 6124 elen += sizeof(struct sadb_supported); 6125 6126 len = sizeof(struct sadb_msg) + alen + elen; 6127 6128 if (len > MCLBYTES) 6129 return key_senderror(so, m, ENOBUFS); 6130 6131 MGETHDR(n, M_DONTWAIT, MT_DATA); 6132 if (len > MHLEN) { 6133 MCLGET(n, M_DONTWAIT); 6134 if ((n->m_flags & M_EXT) == 0) { 6135 m_freem(n); 6136 n = NULL; 6137 } 6138 } 6139 if (!n) 6140 return key_senderror(so, m, ENOBUFS); 6141 6142 n->m_pkthdr.len = n->m_len = len; 6143 n->m_next = NULL; 6144 off = 0; 6145 6146 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6147 newmsg = mtod(n, struct sadb_msg *); 6148 newmsg->sadb_msg_errno = 0; 6149 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6150 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6151 6152 /* for authentication algorithm */ 6153 if (alen) { 6154 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6155 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6156 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6157 off += PFKEY_ALIGN8(sizeof(*sup)); 6158 6159 for (i = 1; i <= SADB_AALG_MAX; i++) { 6160 struct auth_hash *aalgo; 6161 u_int16_t minkeysize, maxkeysize; 6162 6163 aalgo = ah_algorithm_lookup(i); 6164 if (!aalgo) 6165 continue; 6166 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6167 alg->sadb_alg_id = i; 6168 alg->sadb_alg_ivlen = 0; 6169 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6170 alg->sadb_alg_minbits = _BITS(minkeysize); 6171 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6172 off += PFKEY_ALIGN8(sizeof(*alg)); 6173 } 6174 } 6175 6176 /* for encryption algorithm */ 6177 if (elen) { 6178 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6179 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6180 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6181 off += PFKEY_ALIGN8(sizeof(*sup)); 6182 6183 for (i = 1; i <= SADB_EALG_MAX; i++) { 6184 struct enc_xform *ealgo; 6185 6186 ealgo = esp_algorithm_lookup(i); 6187 if (!ealgo) 6188 continue; 6189 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6190 alg->sadb_alg_id = i; 6191 alg->sadb_alg_ivlen = ealgo->blocksize; 6192 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6193 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6194 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6195 } 6196 } 6197 6198 #ifdef DIGAGNOSTIC 6199 if (off != len) 6200 panic("length assumption failed in key_register"); 6201 #endif 6202 6203 m_freem(m); 6204 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6205 } 6206 } 6207 6208 /* 6209 * free secreg entry registered. 6210 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6211 */ 6212 void 6213 key_freereg(so) 6214 struct socket *so; 6215 { 6216 struct secreg *reg; 6217 int i; 6218 6219 /* sanity check */ 6220 if (so == NULL) 6221 panic("key_freereg: NULL pointer is passed.\n"); 6222 6223 /* 6224 * check whether existing or not. 6225 * check all type of SA, because there is a potential that 6226 * one socket is registered to multiple type of SA. 6227 */ 6228 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6229 LIST_FOREACH(reg, ®tree[i], chain) { 6230 if (reg->so == so 6231 && __LIST_CHAINED(reg)) { 6232 LIST_REMOVE(reg, chain); 6233 KFREE(reg); 6234 break; 6235 } 6236 } 6237 } 6238 6239 return; 6240 } 6241 6242 /* 6243 * SADB_EXPIRE processing 6244 * send 6245 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6246 * to KMD by PF_KEY. 6247 * NOTE: We send only soft lifetime extension. 6248 * 6249 * OUT: 0 : succeed 6250 * others : error number 6251 */ 6252 static int 6253 key_expire(sav) 6254 struct secasvar *sav; 6255 { 6256 int s; 6257 int satype; 6258 struct mbuf *result = NULL, *m; 6259 int len; 6260 int error = -1; 6261 struct sadb_lifetime *lt; 6262 6263 /* XXX: Why do we lock ? */ 6264 s = splsoftnet(); /*called from softclock()*/ 6265 6266 /* sanity check */ 6267 if (sav == NULL) 6268 panic("key_expire: NULL pointer is passed.\n"); 6269 if (sav->sah == NULL) 6270 panic("key_expire: Why was SA index in SA NULL.\n"); 6271 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6272 panic("key_expire: invalid proto is passed.\n"); 6273 6274 /* set msg header */ 6275 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6276 if (!m) { 6277 error = ENOBUFS; 6278 goto fail; 6279 } 6280 result = m; 6281 6282 /* create SA extension */ 6283 m = key_setsadbsa(sav); 6284 if (!m) { 6285 error = ENOBUFS; 6286 goto fail; 6287 } 6288 m_cat(result, m); 6289 6290 /* create SA extension */ 6291 m = key_setsadbxsa2(sav->sah->saidx.mode, 6292 sav->replay ? sav->replay->count : 0, 6293 sav->sah->saidx.reqid); 6294 if (!m) { 6295 error = ENOBUFS; 6296 goto fail; 6297 } 6298 m_cat(result, m); 6299 6300 /* create lifetime extension (current and soft) */ 6301 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6302 m = key_alloc_mbuf(len); 6303 if (!m || m->m_next) { /*XXX*/ 6304 if (m) 6305 m_freem(m); 6306 error = ENOBUFS; 6307 goto fail; 6308 } 6309 bzero(mtod(m, caddr_t), len); 6310 lt = mtod(m, struct sadb_lifetime *); 6311 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6312 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6313 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6314 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6315 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6316 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6317 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6318 bcopy(sav->lft_s, lt, sizeof(*lt)); 6319 m_cat(result, m); 6320 6321 /* set sadb_address for source */ 6322 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6323 &sav->sah->saidx.src.sa, 6324 FULLMASK, IPSEC_ULPROTO_ANY); 6325 if (!m) { 6326 error = ENOBUFS; 6327 goto fail; 6328 } 6329 m_cat(result, m); 6330 6331 /* set sadb_address for destination */ 6332 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6333 &sav->sah->saidx.dst.sa, 6334 FULLMASK, IPSEC_ULPROTO_ANY); 6335 if (!m) { 6336 error = ENOBUFS; 6337 goto fail; 6338 } 6339 m_cat(result, m); 6340 6341 if ((result->m_flags & M_PKTHDR) == 0) { 6342 error = EINVAL; 6343 goto fail; 6344 } 6345 6346 if (result->m_len < sizeof(struct sadb_msg)) { 6347 result = m_pullup(result, sizeof(struct sadb_msg)); 6348 if (result == NULL) { 6349 error = ENOBUFS; 6350 goto fail; 6351 } 6352 } 6353 6354 result->m_pkthdr.len = 0; 6355 for (m = result; m; m = m->m_next) 6356 result->m_pkthdr.len += m->m_len; 6357 6358 mtod(result, struct sadb_msg *)->sadb_msg_len = 6359 PFKEY_UNIT64(result->m_pkthdr.len); 6360 6361 splx(s); 6362 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6363 6364 fail: 6365 if (result) 6366 m_freem(result); 6367 splx(s); 6368 return error; 6369 } 6370 6371 /* 6372 * SADB_FLUSH processing 6373 * receive 6374 * <base> 6375 * from the ikmpd, and free all entries in secastree. 6376 * and send, 6377 * <base> 6378 * to the ikmpd. 6379 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6380 * 6381 * m will always be freed. 6382 */ 6383 static int 6384 key_flush(so, m, mhp) 6385 struct socket *so; 6386 struct mbuf *m; 6387 const struct sadb_msghdr *mhp; 6388 { 6389 struct sadb_msg *newmsg; 6390 struct secashead *sah, *nextsah; 6391 struct secasvar *sav, *nextsav; 6392 u_int16_t proto; 6393 u_int8_t state; 6394 u_int stateidx; 6395 6396 /* sanity check */ 6397 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6398 panic("key_flush: NULL pointer is passed.\n"); 6399 6400 /* map satype to proto */ 6401 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6402 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6403 return key_senderror(so, m, EINVAL); 6404 } 6405 6406 /* no SATYPE specified, i.e. flushing all SA. */ 6407 for (sah = LIST_FIRST(&sahtree); 6408 sah != NULL; 6409 sah = nextsah) { 6410 nextsah = LIST_NEXT(sah, chain); 6411 6412 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6413 && proto != sah->saidx.proto) 6414 continue; 6415 6416 for (stateidx = 0; 6417 stateidx < _ARRAYLEN(saorder_state_alive); 6418 stateidx++) { 6419 state = saorder_state_any[stateidx]; 6420 for (sav = LIST_FIRST(&sah->savtree[state]); 6421 sav != NULL; 6422 sav = nextsav) { 6423 6424 nextsav = LIST_NEXT(sav, chain); 6425 6426 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6427 KEY_FREESAV(&sav); 6428 } 6429 } 6430 6431 sah->state = SADB_SASTATE_DEAD; 6432 } 6433 6434 if (m->m_len < sizeof(struct sadb_msg) || 6435 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6436 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6437 return key_senderror(so, m, ENOBUFS); 6438 } 6439 6440 if (m->m_next) 6441 m_freem(m->m_next); 6442 m->m_next = NULL; 6443 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6444 newmsg = mtod(m, struct sadb_msg *); 6445 newmsg->sadb_msg_errno = 0; 6446 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6447 6448 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6449 } 6450 6451 /* 6452 * SADB_DUMP processing 6453 * dump all entries including status of DEAD in SAD. 6454 * receive 6455 * <base> 6456 * from the ikmpd, and dump all secasvar leaves 6457 * and send, 6458 * <base> ..... 6459 * to the ikmpd. 6460 * 6461 * m will always be freed. 6462 */ 6463 static int 6464 key_dump(so, m, mhp) 6465 struct socket *so; 6466 struct mbuf *m; 6467 const struct sadb_msghdr *mhp; 6468 { 6469 struct secashead *sah; 6470 struct secasvar *sav; 6471 u_int16_t proto; 6472 u_int stateidx; 6473 u_int8_t satype; 6474 u_int8_t state; 6475 int cnt; 6476 struct sadb_msg *newmsg; 6477 struct mbuf *n; 6478 6479 /* sanity check */ 6480 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6481 panic("key_dump: NULL pointer is passed.\n"); 6482 6483 /* map satype to proto */ 6484 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6485 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 6486 return key_senderror(so, m, EINVAL); 6487 } 6488 6489 /* count sav entries to be sent to the userland. */ 6490 cnt = 0; 6491 LIST_FOREACH(sah, &sahtree, chain) { 6492 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6493 && proto != sah->saidx.proto) 6494 continue; 6495 6496 for (stateidx = 0; 6497 stateidx < _ARRAYLEN(saorder_state_any); 6498 stateidx++) { 6499 state = saorder_state_any[stateidx]; 6500 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6501 cnt++; 6502 } 6503 } 6504 } 6505 6506 if (cnt == 0) 6507 return key_senderror(so, m, ENOENT); 6508 6509 /* send this to the userland, one at a time. */ 6510 newmsg = NULL; 6511 LIST_FOREACH(sah, &sahtree, chain) { 6512 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6513 && proto != sah->saidx.proto) 6514 continue; 6515 6516 /* map proto to satype */ 6517 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6518 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n")); 6519 return key_senderror(so, m, EINVAL); 6520 } 6521 6522 for (stateidx = 0; 6523 stateidx < _ARRAYLEN(saorder_state_any); 6524 stateidx++) { 6525 state = saorder_state_any[stateidx]; 6526 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6527 n = key_setdumpsa(sav, SADB_DUMP, satype, 6528 --cnt, mhp->msg->sadb_msg_pid); 6529 if (!n) 6530 return key_senderror(so, m, ENOBUFS); 6531 6532 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6533 } 6534 } 6535 } 6536 6537 m_freem(m); 6538 return 0; 6539 } 6540 6541 /* 6542 * SADB_X_PROMISC processing 6543 * 6544 * m will always be freed. 6545 */ 6546 static int 6547 key_promisc(so, m, mhp) 6548 struct socket *so; 6549 struct mbuf *m; 6550 const struct sadb_msghdr *mhp; 6551 { 6552 int olen; 6553 6554 /* sanity check */ 6555 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6556 panic("key_promisc: NULL pointer is passed.\n"); 6557 6558 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6559 6560 if (olen < sizeof(struct sadb_msg)) { 6561 #if 1 6562 return key_senderror(so, m, EINVAL); 6563 #else 6564 m_freem(m); 6565 return 0; 6566 #endif 6567 } else if (olen == sizeof(struct sadb_msg)) { 6568 /* enable/disable promisc mode */ 6569 struct keycb *kp; 6570 6571 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6572 return key_senderror(so, m, EINVAL); 6573 mhp->msg->sadb_msg_errno = 0; 6574 switch (mhp->msg->sadb_msg_satype) { 6575 case 0: 6576 case 1: 6577 kp->kp_promisc = mhp->msg->sadb_msg_satype; 6578 break; 6579 default: 6580 return key_senderror(so, m, EINVAL); 6581 } 6582 6583 /* send the original message back to everyone */ 6584 mhp->msg->sadb_msg_errno = 0; 6585 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6586 } else { 6587 /* send packet as is */ 6588 6589 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6590 6591 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6592 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6593 } 6594 } 6595 6596 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6597 const struct sadb_msghdr *)) = { 6598 NULL, /* SADB_RESERVED */ 6599 key_getspi, /* SADB_GETSPI */ 6600 key_update, /* SADB_UPDATE */ 6601 key_add, /* SADB_ADD */ 6602 key_delete, /* SADB_DELETE */ 6603 key_get, /* SADB_GET */ 6604 key_acquire2, /* SADB_ACQUIRE */ 6605 key_register, /* SADB_REGISTER */ 6606 NULL, /* SADB_EXPIRE */ 6607 key_flush, /* SADB_FLUSH */ 6608 key_dump, /* SADB_DUMP */ 6609 key_promisc, /* SADB_X_PROMISC */ 6610 NULL, /* SADB_X_PCHANGE */ 6611 key_spdadd, /* SADB_X_SPDUPDATE */ 6612 key_spdadd, /* SADB_X_SPDADD */ 6613 key_spddelete, /* SADB_X_SPDDELETE */ 6614 key_spdget, /* SADB_X_SPDGET */ 6615 NULL, /* SADB_X_SPDACQUIRE */ 6616 key_spddump, /* SADB_X_SPDDUMP */ 6617 key_spdflush, /* SADB_X_SPDFLUSH */ 6618 key_spdadd, /* SADB_X_SPDSETIDX */ 6619 NULL, /* SADB_X_SPDEXPIRE */ 6620 key_spddelete2, /* SADB_X_SPDDELETE2 */ 6621 }; 6622 6623 /* 6624 * parse sadb_msg buffer to process PFKEYv2, 6625 * and create a data to response if needed. 6626 * I think to be dealed with mbuf directly. 6627 * IN: 6628 * msgp : pointer to pointer to a received buffer pulluped. 6629 * This is rewrited to response. 6630 * so : pointer to socket. 6631 * OUT: 6632 * length for buffer to send to user process. 6633 */ 6634 int 6635 key_parse(m, so) 6636 struct mbuf *m; 6637 struct socket *so; 6638 { 6639 struct sadb_msg *msg; 6640 struct sadb_msghdr mh; 6641 u_int orglen; 6642 int error; 6643 int target; 6644 6645 /* sanity check */ 6646 if (m == NULL || so == NULL) 6647 panic("key_parse: NULL pointer is passed.\n"); 6648 6649 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6650 KEYDEBUG(KEYDEBUG_KEY_DUMP, 6651 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 6652 kdebug_sadb(msg)); 6653 #endif 6654 6655 if (m->m_len < sizeof(struct sadb_msg)) { 6656 m = m_pullup(m, sizeof(struct sadb_msg)); 6657 if (!m) 6658 return ENOBUFS; 6659 } 6660 msg = mtod(m, struct sadb_msg *); 6661 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6662 target = KEY_SENDUP_ONE; 6663 6664 if ((m->m_flags & M_PKTHDR) == 0 || 6665 m->m_pkthdr.len != m->m_pkthdr.len) { 6666 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 6667 pfkeystat.out_invlen++; 6668 error = EINVAL; 6669 goto senderror; 6670 } 6671 6672 if (msg->sadb_msg_version != PF_KEY_V2) { 6673 ipseclog((LOG_DEBUG, 6674 "key_parse: PF_KEY version %u is mismatched.\n", 6675 msg->sadb_msg_version)); 6676 pfkeystat.out_invver++; 6677 error = EINVAL; 6678 goto senderror; 6679 } 6680 6681 if (msg->sadb_msg_type > SADB_MAX) { 6682 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6683 msg->sadb_msg_type)); 6684 pfkeystat.out_invmsgtype++; 6685 error = EINVAL; 6686 goto senderror; 6687 } 6688 6689 /* for old-fashioned code - should be nuked */ 6690 if (m->m_pkthdr.len > MCLBYTES) { 6691 m_freem(m); 6692 return ENOBUFS; 6693 } 6694 if (m->m_next) { 6695 struct mbuf *n; 6696 6697 MGETHDR(n, M_DONTWAIT, MT_DATA); 6698 if (n && m->m_pkthdr.len > MHLEN) { 6699 MCLGET(n, M_DONTWAIT); 6700 if ((n->m_flags & M_EXT) == 0) { 6701 m_free(n); 6702 n = NULL; 6703 } 6704 } 6705 if (!n) { 6706 m_freem(m); 6707 return ENOBUFS; 6708 } 6709 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 6710 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 6711 n->m_next = NULL; 6712 m_freem(m); 6713 m = n; 6714 } 6715 6716 /* align the mbuf chain so that extensions are in contiguous region. */ 6717 error = key_align(m, &mh); 6718 if (error) 6719 return error; 6720 6721 if (m->m_next) { /*XXX*/ 6722 m_freem(m); 6723 return ENOBUFS; 6724 } 6725 6726 msg = mh.msg; 6727 6728 /* check SA type */ 6729 switch (msg->sadb_msg_satype) { 6730 case SADB_SATYPE_UNSPEC: 6731 switch (msg->sadb_msg_type) { 6732 case SADB_GETSPI: 6733 case SADB_UPDATE: 6734 case SADB_ADD: 6735 case SADB_DELETE: 6736 case SADB_GET: 6737 case SADB_ACQUIRE: 6738 case SADB_EXPIRE: 6739 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 6740 "when msg type=%u.\n", msg->sadb_msg_type)); 6741 pfkeystat.out_invsatype++; 6742 error = EINVAL; 6743 goto senderror; 6744 } 6745 break; 6746 case SADB_SATYPE_AH: 6747 case SADB_SATYPE_ESP: 6748 case SADB_X_SATYPE_IPCOMP: 6749 switch (msg->sadb_msg_type) { 6750 case SADB_X_SPDADD: 6751 case SADB_X_SPDDELETE: 6752 case SADB_X_SPDGET: 6753 case SADB_X_SPDDUMP: 6754 case SADB_X_SPDFLUSH: 6755 case SADB_X_SPDSETIDX: 6756 case SADB_X_SPDUPDATE: 6757 case SADB_X_SPDDELETE2: 6758 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 6759 msg->sadb_msg_type)); 6760 pfkeystat.out_invsatype++; 6761 error = EINVAL; 6762 goto senderror; 6763 } 6764 break; 6765 case SADB_SATYPE_RSVP: 6766 case SADB_SATYPE_OSPFV2: 6767 case SADB_SATYPE_RIPV2: 6768 case SADB_SATYPE_MIP: 6769 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 6770 msg->sadb_msg_satype)); 6771 pfkeystat.out_invsatype++; 6772 error = EOPNOTSUPP; 6773 goto senderror; 6774 case 1: /* XXX: What does it do? */ 6775 if (msg->sadb_msg_type == SADB_X_PROMISC) 6776 break; 6777 /*FALLTHROUGH*/ 6778 default: 6779 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6780 msg->sadb_msg_satype)); 6781 pfkeystat.out_invsatype++; 6782 error = EINVAL; 6783 goto senderror; 6784 } 6785 6786 /* check field of upper layer protocol and address family */ 6787 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 6788 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 6789 struct sadb_address *src0, *dst0; 6790 u_int plen; 6791 6792 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 6793 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 6794 6795 /* check upper layer protocol */ 6796 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 6797 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 6798 pfkeystat.out_invaddr++; 6799 error = EINVAL; 6800 goto senderror; 6801 } 6802 6803 /* check family */ 6804 if (PFKEY_ADDR_SADDR(src0)->sa_family != 6805 PFKEY_ADDR_SADDR(dst0)->sa_family) { 6806 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 6807 pfkeystat.out_invaddr++; 6808 error = EINVAL; 6809 goto senderror; 6810 } 6811 if (PFKEY_ADDR_SADDR(src0)->sa_len != 6812 PFKEY_ADDR_SADDR(dst0)->sa_len) { 6813 ipseclog((LOG_DEBUG, 6814 "key_parse: address struct size mismatched.\n")); 6815 pfkeystat.out_invaddr++; 6816 error = EINVAL; 6817 goto senderror; 6818 } 6819 6820 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6821 case AF_INET: 6822 if (PFKEY_ADDR_SADDR(src0)->sa_len != 6823 sizeof(struct sockaddr_in)) { 6824 pfkeystat.out_invaddr++; 6825 error = EINVAL; 6826 goto senderror; 6827 } 6828 break; 6829 case AF_INET6: 6830 if (PFKEY_ADDR_SADDR(src0)->sa_len != 6831 sizeof(struct sockaddr_in6)) { 6832 pfkeystat.out_invaddr++; 6833 error = EINVAL; 6834 goto senderror; 6835 } 6836 break; 6837 default: 6838 ipseclog((LOG_DEBUG, 6839 "key_parse: unsupported address family.\n")); 6840 pfkeystat.out_invaddr++; 6841 error = EAFNOSUPPORT; 6842 goto senderror; 6843 } 6844 6845 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6846 case AF_INET: 6847 plen = sizeof(struct in_addr) << 3; 6848 break; 6849 case AF_INET6: 6850 plen = sizeof(struct in6_addr) << 3; 6851 break; 6852 default: 6853 plen = 0; /*fool gcc*/ 6854 break; 6855 } 6856 6857 /* check max prefix length */ 6858 if (src0->sadb_address_prefixlen > plen || 6859 dst0->sadb_address_prefixlen > plen) { 6860 ipseclog((LOG_DEBUG, 6861 "key_parse: illegal prefixlen.\n")); 6862 pfkeystat.out_invaddr++; 6863 error = EINVAL; 6864 goto senderror; 6865 } 6866 6867 /* 6868 * prefixlen == 0 is valid because there can be a case when 6869 * all addresses are matched. 6870 */ 6871 } 6872 6873 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 6874 key_typesw[msg->sadb_msg_type] == NULL) { 6875 pfkeystat.out_invmsgtype++; 6876 error = EINVAL; 6877 goto senderror; 6878 } 6879 6880 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 6881 6882 senderror: 6883 msg->sadb_msg_errno = error; 6884 return key_sendup_mbuf(so, m, target); 6885 } 6886 6887 static int 6888 key_senderror(so, m, code) 6889 struct socket *so; 6890 struct mbuf *m; 6891 int code; 6892 { 6893 struct sadb_msg *msg; 6894 6895 if (m->m_len < sizeof(struct sadb_msg)) 6896 panic("invalid mbuf passed to key_senderror"); 6897 6898 msg = mtod(m, struct sadb_msg *); 6899 msg->sadb_msg_errno = code; 6900 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 6901 } 6902 6903 /* 6904 * set the pointer to each header into message buffer. 6905 * m will be freed on error. 6906 * XXX larger-than-MCLBYTES extension? 6907 */ 6908 static int 6909 key_align(m, mhp) 6910 struct mbuf *m; 6911 struct sadb_msghdr *mhp; 6912 { 6913 struct mbuf *n; 6914 struct sadb_ext *ext; 6915 size_t off, end; 6916 int extlen; 6917 int toff; 6918 6919 /* sanity check */ 6920 if (m == NULL || mhp == NULL) 6921 panic("key_align: NULL pointer is passed.\n"); 6922 if (m->m_len < sizeof(struct sadb_msg)) 6923 panic("invalid mbuf passed to key_align"); 6924 6925 /* initialize */ 6926 bzero(mhp, sizeof(*mhp)); 6927 6928 mhp->msg = mtod(m, struct sadb_msg *); 6929 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 6930 6931 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6932 extlen = end; /*just in case extlen is not updated*/ 6933 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 6934 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 6935 if (!n) { 6936 /* m is already freed */ 6937 return ENOBUFS; 6938 } 6939 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 6940 6941 /* set pointer */ 6942 switch (ext->sadb_ext_type) { 6943 case SADB_EXT_SA: 6944 case SADB_EXT_ADDRESS_SRC: 6945 case SADB_EXT_ADDRESS_DST: 6946 case SADB_EXT_ADDRESS_PROXY: 6947 case SADB_EXT_LIFETIME_CURRENT: 6948 case SADB_EXT_LIFETIME_HARD: 6949 case SADB_EXT_LIFETIME_SOFT: 6950 case SADB_EXT_KEY_AUTH: 6951 case SADB_EXT_KEY_ENCRYPT: 6952 case SADB_EXT_IDENTITY_SRC: 6953 case SADB_EXT_IDENTITY_DST: 6954 case SADB_EXT_SENSITIVITY: 6955 case SADB_EXT_PROPOSAL: 6956 case SADB_EXT_SUPPORTED_AUTH: 6957 case SADB_EXT_SUPPORTED_ENCRYPT: 6958 case SADB_EXT_SPIRANGE: 6959 case SADB_X_EXT_POLICY: 6960 case SADB_X_EXT_SA2: 6961 /* duplicate check */ 6962 /* 6963 * XXX Are there duplication payloads of either 6964 * KEY_AUTH or KEY_ENCRYPT ? 6965 */ 6966 if (mhp->ext[ext->sadb_ext_type] != NULL) { 6967 ipseclog((LOG_DEBUG, 6968 "key_align: duplicate ext_type %u " 6969 "is passed.\n", ext->sadb_ext_type)); 6970 m_freem(m); 6971 pfkeystat.out_dupext++; 6972 return EINVAL; 6973 } 6974 break; 6975 default: 6976 ipseclog((LOG_DEBUG, 6977 "key_align: invalid ext_type %u is passed.\n", 6978 ext->sadb_ext_type)); 6979 m_freem(m); 6980 pfkeystat.out_invexttype++; 6981 return EINVAL; 6982 } 6983 6984 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 6985 6986 if (key_validate_ext(ext, extlen)) { 6987 m_freem(m); 6988 pfkeystat.out_invlen++; 6989 return EINVAL; 6990 } 6991 6992 n = m_pulldown(m, off, extlen, &toff); 6993 if (!n) { 6994 /* m is already freed */ 6995 return ENOBUFS; 6996 } 6997 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 6998 6999 mhp->ext[ext->sadb_ext_type] = ext; 7000 mhp->extoff[ext->sadb_ext_type] = off; 7001 mhp->extlen[ext->sadb_ext_type] = extlen; 7002 } 7003 7004 if (off != end) { 7005 m_freem(m); 7006 pfkeystat.out_invlen++; 7007 return EINVAL; 7008 } 7009 7010 return 0; 7011 } 7012 7013 static int 7014 key_validate_ext(ext, len) 7015 const struct sadb_ext *ext; 7016 int len; 7017 { 7018 const struct sockaddr *sa; 7019 enum { NONE, ADDR } checktype = NONE; 7020 int baselen = 0; 7021 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7022 7023 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7024 return EINVAL; 7025 7026 /* if it does not match minimum/maximum length, bail */ 7027 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7028 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7029 return EINVAL; 7030 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7031 return EINVAL; 7032 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7033 return EINVAL; 7034 7035 /* more checks based on sadb_ext_type XXX need more */ 7036 switch (ext->sadb_ext_type) { 7037 case SADB_EXT_ADDRESS_SRC: 7038 case SADB_EXT_ADDRESS_DST: 7039 case SADB_EXT_ADDRESS_PROXY: 7040 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7041 checktype = ADDR; 7042 break; 7043 case SADB_EXT_IDENTITY_SRC: 7044 case SADB_EXT_IDENTITY_DST: 7045 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7046 SADB_X_IDENTTYPE_ADDR) { 7047 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7048 checktype = ADDR; 7049 } else 7050 checktype = NONE; 7051 break; 7052 default: 7053 checktype = NONE; 7054 break; 7055 } 7056 7057 switch (checktype) { 7058 case NONE: 7059 break; 7060 case ADDR: 7061 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7062 if (len < baselen + sal) 7063 return EINVAL; 7064 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7065 return EINVAL; 7066 break; 7067 } 7068 7069 return 0; 7070 } 7071 7072 void 7073 key_init() 7074 { 7075 int i; 7076 7077 callout_init(&key_timehandler_ch); 7078 7079 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7080 LIST_INIT(&sptree[i]); 7081 } 7082 7083 LIST_INIT(&sahtree); 7084 7085 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7086 LIST_INIT(®tree[i]); 7087 } 7088 7089 #ifndef IPSEC_NONBLOCK_ACQUIRE 7090 LIST_INIT(&acqtree); 7091 #endif 7092 LIST_INIT(&spacqtree); 7093 7094 /* system default */ 7095 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7096 ip4_def_policy.refcnt++; /*never reclaim this*/ 7097 7098 7099 #ifndef IPSEC_DEBUG2 7100 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 7101 #endif /*IPSEC_DEBUG2*/ 7102 7103 /* initialize key statistics */ 7104 keystat.getspi_count = 1; 7105 7106 printf("IPsec: Initialized Security Association Processing.\n"); 7107 7108 return; 7109 } 7110 7111 /* 7112 * XXX: maybe This function is called after INBOUND IPsec processing. 7113 * 7114 * Special check for tunnel-mode packets. 7115 * We must make some checks for consistency between inner and outer IP header. 7116 * 7117 * xxx more checks to be provided 7118 */ 7119 int 7120 key_checktunnelsanity(sav, family, src, dst) 7121 struct secasvar *sav; 7122 u_int family; 7123 caddr_t src; 7124 caddr_t dst; 7125 { 7126 /* sanity check */ 7127 if (sav->sah == NULL) 7128 panic("sav->sah == NULL at key_checktunnelsanity"); 7129 7130 /* XXX: check inner IP header */ 7131 7132 return 1; 7133 } 7134 7135 #if 0 7136 #define hostnamelen strlen(hostname) 7137 7138 /* 7139 * Get FQDN for the host. 7140 * If the administrator configured hostname (by hostname(1)) without 7141 * domain name, returns nothing. 7142 */ 7143 static const char * 7144 key_getfqdn() 7145 { 7146 int i; 7147 int hasdot; 7148 static char fqdn[MAXHOSTNAMELEN + 1]; 7149 7150 if (!hostnamelen) 7151 return NULL; 7152 7153 /* check if it comes with domain name. */ 7154 hasdot = 0; 7155 for (i = 0; i < hostnamelen; i++) { 7156 if (hostname[i] == '.') 7157 hasdot++; 7158 } 7159 if (!hasdot) 7160 return NULL; 7161 7162 /* NOTE: hostname may not be NUL-terminated. */ 7163 bzero(fqdn, sizeof(fqdn)); 7164 bcopy(hostname, fqdn, hostnamelen); 7165 fqdn[hostnamelen] = '\0'; 7166 return fqdn; 7167 } 7168 7169 /* 7170 * get username@FQDN for the host/user. 7171 */ 7172 static const char * 7173 key_getuserfqdn() 7174 { 7175 const char *host; 7176 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7177 struct proc *p = curproc; 7178 char *q; 7179 7180 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7181 return NULL; 7182 if (!(host = key_getfqdn())) 7183 return NULL; 7184 7185 /* NOTE: s_login may not be-NUL terminated. */ 7186 bzero(userfqdn, sizeof(userfqdn)); 7187 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7188 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7189 q = userfqdn + strlen(userfqdn); 7190 *q++ = '@'; 7191 bcopy(host, q, strlen(host)); 7192 q += strlen(host); 7193 *q++ = '\0'; 7194 7195 return userfqdn; 7196 } 7197 #endif 7198 7199 /* record data transfer on SA, and update timestamps */ 7200 void 7201 key_sa_recordxfer(sav, m) 7202 struct secasvar *sav; 7203 struct mbuf *m; 7204 { 7205 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7206 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7207 if (!sav->lft_c) 7208 return; 7209 7210 /* 7211 * XXX Currently, there is a difference of bytes size 7212 * between inbound and outbound processing. 7213 */ 7214 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7215 /* to check bytes lifetime is done in key_timehandler(). */ 7216 7217 /* 7218 * We use the number of packets as the unit of 7219 * sadb_lifetime_allocations. We increment the variable 7220 * whenever {esp,ah}_{in,out}put is called. 7221 */ 7222 sav->lft_c->sadb_lifetime_allocations++; 7223 /* XXX check for expires? */ 7224 7225 /* 7226 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7227 * in seconds. HARD and SOFT lifetime are measured by the time 7228 * difference (again in seconds) from sadb_lifetime_usetime. 7229 * 7230 * usetime 7231 * v expire expire 7232 * -----+-----+--------+---> t 7233 * <--------------> HARD 7234 * <-----> SOFT 7235 */ 7236 sav->lft_c->sadb_lifetime_usetime = time_second; 7237 /* XXX check for expires? */ 7238 7239 return; 7240 } 7241 7242 /* dumb version */ 7243 void 7244 key_sa_routechange(dst) 7245 struct sockaddr *dst; 7246 { 7247 struct secashead *sah; 7248 struct route *ro; 7249 7250 LIST_FOREACH(sah, &sahtree, chain) { 7251 ro = &sah->sa_route; 7252 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7253 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7254 RTFREE(ro->ro_rt); 7255 ro->ro_rt = (struct rtentry *)NULL; 7256 } 7257 } 7258 7259 return; 7260 } 7261 7262 static void 7263 key_sa_chgstate(sav, state) 7264 struct secasvar *sav; 7265 u_int8_t state; 7266 { 7267 if (sav == NULL) 7268 panic("key_sa_chgstate called with sav == NULL"); 7269 7270 if (sav->state == state) 7271 return; 7272 7273 if (__LIST_CHAINED(sav)) 7274 LIST_REMOVE(sav, chain); 7275 7276 sav->state = state; 7277 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7278 } 7279 7280 void 7281 key_sa_stir_iv(sav) 7282 struct secasvar *sav; 7283 { 7284 7285 if (!sav->iv) 7286 panic("key_sa_stir_iv called with sav == NULL"); 7287 key_randomfill(sav->iv, sav->ivlen); 7288 } 7289 7290 /* XXX too much? */ 7291 static struct mbuf * 7292 key_alloc_mbuf(l) 7293 int l; 7294 { 7295 struct mbuf *m = NULL, *n; 7296 int len, t; 7297 7298 len = l; 7299 while (len > 0) { 7300 MGET(n, M_DONTWAIT, MT_DATA); 7301 if (n && len > MLEN) 7302 MCLGET(n, M_DONTWAIT); 7303 if (!n) { 7304 m_freem(m); 7305 return NULL; 7306 } 7307 7308 n->m_next = NULL; 7309 n->m_len = 0; 7310 n->m_len = M_TRAILINGSPACE(n); 7311 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7312 if (n->m_len > len) { 7313 t = (n->m_len - len) & ~(sizeof(long) - 1); 7314 n->m_data += t; 7315 n->m_len = len; 7316 } 7317 7318 len -= n->m_len; 7319 7320 if (m) 7321 m_cat(m, n); 7322 else 7323 m = n; 7324 } 7325 7326 return m; 7327 } 7328 7329 static struct mbuf * 7330 key_setdump(u_int8_t req_satype, int *errorp) 7331 { 7332 struct secashead *sah; 7333 struct secasvar *sav; 7334 u_int16_t proto; 7335 u_int stateidx; 7336 u_int8_t satype; 7337 u_int8_t state; 7338 int cnt; 7339 struct mbuf *m, *n; 7340 7341 /* map satype to proto */ 7342 if ((proto = key_satype2proto(req_satype)) == 0) { 7343 *errorp = EINVAL; 7344 return (NULL); 7345 } 7346 7347 /* count sav entries to be sent to the userland. */ 7348 cnt = 0; 7349 LIST_FOREACH(sah, &sahtree, chain) { 7350 if (req_satype != SADB_SATYPE_UNSPEC && 7351 proto != sah->saidx.proto) 7352 continue; 7353 7354 for (stateidx = 0; 7355 stateidx < _ARRAYLEN(saorder_state_any); 7356 stateidx++) { 7357 state = saorder_state_any[stateidx]; 7358 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7359 cnt++; 7360 } 7361 } 7362 } 7363 7364 if (cnt == 0) { 7365 *errorp = ENOENT; 7366 return (NULL); 7367 } 7368 7369 /* send this to the userland, one at a time. */ 7370 m = NULL; 7371 LIST_FOREACH(sah, &sahtree, chain) { 7372 if (req_satype != SADB_SATYPE_UNSPEC && 7373 proto != sah->saidx.proto) 7374 continue; 7375 7376 /* map proto to satype */ 7377 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7378 m_freem(m); 7379 *errorp = EINVAL; 7380 return (NULL); 7381 } 7382 7383 for (stateidx = 0; 7384 stateidx < _ARRAYLEN(saorder_state_any); 7385 stateidx++) { 7386 state = saorder_state_any[stateidx]; 7387 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7388 n = key_setdumpsa(sav, SADB_DUMP, satype, 7389 --cnt, 0); 7390 if (!n) { 7391 m_freem(m); 7392 *errorp = ENOBUFS; 7393 return (NULL); 7394 } 7395 7396 if (!m) 7397 m = n; 7398 else 7399 m_cat(m, n); 7400 } 7401 } 7402 } 7403 7404 if (!m) { 7405 *errorp = EINVAL; 7406 return (NULL); 7407 } 7408 7409 if ((m->m_flags & M_PKTHDR) != 0) { 7410 m->m_pkthdr.len = 0; 7411 for (n = m; n; n = n->m_next) 7412 m->m_pkthdr.len += n->m_len; 7413 } 7414 7415 *errorp = 0; 7416 return (m); 7417 } 7418 7419 static struct mbuf * 7420 key_setspddump(int *errorp) 7421 { 7422 struct secpolicy *sp; 7423 int cnt; 7424 u_int dir; 7425 struct mbuf *m, *n; 7426 7427 /* search SPD entry and get buffer size. */ 7428 cnt = 0; 7429 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7430 LIST_FOREACH(sp, &sptree[dir], chain) { 7431 cnt++; 7432 } 7433 } 7434 7435 if (cnt == 0) { 7436 *errorp = ENOENT; 7437 return (NULL); 7438 } 7439 7440 m = NULL; 7441 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7442 LIST_FOREACH(sp, &sptree[dir], chain) { 7443 --cnt; 7444 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 0); 7445 7446 if (!n) { 7447 *errorp = ENOBUFS; 7448 m_freem(m); 7449 return (NULL); 7450 } 7451 if (!m) 7452 m = n; 7453 else { 7454 m->m_pkthdr.len += n->m_pkthdr.len; 7455 m_cat(m, n); 7456 } 7457 } 7458 } 7459 7460 *errorp = 0; 7461 return (m); 7462 } 7463 7464 static int 7465 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 7466 { 7467 struct mbuf *m, *n; 7468 int err2 = 0; 7469 char *p, *ep; 7470 size_t len; 7471 int s, error; 7472 7473 if (newp) 7474 return (EPERM); 7475 if (namelen != 1) 7476 return (EINVAL); 7477 7478 s = splsoftnet(); 7479 m = key_setdump(name[1], &error); 7480 splx(s); 7481 if (!m) 7482 return (error); 7483 if (!oldp) 7484 *oldlenp = m->m_pkthdr.len; 7485 else { 7486 p = oldp; 7487 if (*oldlenp < m->m_pkthdr.len) { 7488 err2 = ENOMEM; 7489 ep = p + *oldlenp; 7490 } else { 7491 *oldlenp = m->m_pkthdr.len; 7492 ep = p + m->m_pkthdr.len; 7493 } 7494 for (n = m; n; n = n->m_next) { 7495 len = (ep - p < n->m_len) ? 7496 ep - p : n->m_len; 7497 error = copyout(mtod(n, const void *), p, len); 7498 p += len; 7499 if (error) 7500 break; 7501 } 7502 if (error == 0) 7503 error = err2; 7504 } 7505 m_freem(m); 7506 7507 return (error); 7508 } 7509 7510 static int 7511 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 7512 { 7513 struct mbuf *m, *n; 7514 int err2 = 0; 7515 char *p, *ep; 7516 size_t len; 7517 int s, error; 7518 7519 if (newp) 7520 return (EPERM); 7521 if (namelen != 0) 7522 return (EINVAL); 7523 7524 s = splsoftnet(); 7525 m = key_setspddump(&error); 7526 splx(s); 7527 if (!m) 7528 return (error); 7529 if (!oldp) 7530 *oldlenp = m->m_pkthdr.len; 7531 else { 7532 p = oldp; 7533 if (*oldlenp < m->m_pkthdr.len) { 7534 err2 = ENOMEM; 7535 ep = p + *oldlenp; 7536 } else { 7537 *oldlenp = m->m_pkthdr.len; 7538 ep = p + m->m_pkthdr.len; 7539 } 7540 for (n = m; n; n = n->m_next) { 7541 len = (ep - p < n->m_len) ? 7542 ep - p : n->m_len; 7543 error = copyout(mtod(n, const void *), p, len); 7544 p += len; 7545 if (error) 7546 break; 7547 } 7548 if (error == 0) 7549 error = err2; 7550 } 7551 m_freem(m); 7552 7553 return (error); 7554 } 7555 7556 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 7557 { 7558 7559 sysctl_createv(SYSCTL_PERMANENT, 7560 CTLTYPE_NODE, "net", NULL, 7561 NULL, 0, NULL, 0, 7562 CTL_NET, CTL_EOL); 7563 sysctl_createv(SYSCTL_PERMANENT, 7564 CTLTYPE_NODE, "keyv2", NULL, 7565 NULL, 0, NULL, 0, 7566 CTL_NET, PF_KEY_V2, CTL_EOL); 7567 7568 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7569 CTLTYPE_INT, "debug", NULL, 7570 NULL, 0, &key_debug_level, 0, 7571 CTL_NET, PF_KEY_V2, KEYCTL_DEBUG_LEVEL, CTL_EOL); 7572 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7573 CTLTYPE_INT, "spi_try", NULL, 7574 NULL, 0, &key_spi_trycnt, 0, 7575 CTL_NET, PF_KEY_V2, KEYCTL_SPI_TRY, CTL_EOL); 7576 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7577 CTLTYPE_INT, "spi_min_value", NULL, 7578 NULL, 0, &key_spi_minval, 0, 7579 CTL_NET, PF_KEY_V2, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 7580 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7581 CTLTYPE_INT, "spi_max_value", NULL, 7582 NULL, 0, &key_spi_maxval, 0, 7583 CTL_NET, PF_KEY_V2, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 7584 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7585 CTLTYPE_INT, "random_int", NULL, 7586 NULL, 0, &key_int_random, 0, 7587 CTL_NET, PF_KEY_V2, KEYCTL_RANDOM_INT, CTL_EOL); 7588 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7589 CTLTYPE_INT, "larval_lifetime", NULL, 7590 NULL, 0, &key_larval_lifetime, 0, 7591 CTL_NET, PF_KEY_V2, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 7592 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7593 CTLTYPE_INT, "blockacq_count", NULL, 7594 NULL, 0, &key_blockacq_count, 0, 7595 CTL_NET, PF_KEY_V2, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 7596 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7597 CTLTYPE_INT, "blockacq_lifetime", NULL, 7598 NULL, 0, &key_blockacq_lifetime, 0, 7599 CTL_NET, PF_KEY_V2, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 7600 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7601 CTLTYPE_INT, "esp_keymin", NULL, 7602 NULL, 0, &ipsec_esp_keymin, 0, 7603 CTL_NET, PF_KEY_V2, KEYCTL_ESP_KEYMIN, CTL_EOL); 7604 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7605 CTLTYPE_INT, "esp_auth", NULL, 7606 NULL, 0, &ipsec_esp_auth, 0, 7607 CTL_NET, PF_KEY_V2, KEYCTL_ESP_AUTH, CTL_EOL); 7608 sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, 7609 CTLTYPE_INT, "ah_keymin", NULL, 7610 NULL, 0, &ipsec_ah_keymin, 0, 7611 CTL_NET, PF_KEY_V2, KEYCTL_AH_KEYMIN, CTL_EOL); 7612 sysctl_createv(SYSCTL_PERMANENT, 7613 CTLTYPE_STRUCT, "dumpsa", NULL, 7614 sysctl_net_key_dumpsa, 0, NULL, 0, 7615 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 7616 sysctl_createv(SYSCTL_PERMANENT, 7617 CTLTYPE_STRUCT, "dumpsp", NULL, 7618 sysctl_net_key_dumpsp, 0, NULL, 0, 7619 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 7620 } 7621
Indexes created Sun Sep 21 20:09:37 GMT 2025