key.c revision 1.44
1 /* $NetBSD: key.c,v 1.44 2007/04/09 21:07:03 degroote Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms 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 1.44 2007/04/09 21:07:03 degroote 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 #include <netipsec/ipcomp.h> 106 107 108 #include <machine/stdarg.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 /* 117 * Note on SA reference counting: 118 * - SAs that are not in DEAD state will have (total external reference + 1) 119 * following value in reference count field. they cannot be freed and are 120 * referenced from SA header. 121 * - SAs that are in DEAD state will have (total external reference) 122 * in reference count field. they are ready to be freed. reference from 123 * SA header will be removed in key_delsav(), when the reference count 124 * field hits 0 (= no external reference other than from SA header. 125 */ 126 127 u_int32_t key_debug_level = 0; 128 static u_int key_spi_trycnt = 1000; 129 static u_int32_t key_spi_minval = 0x100; 130 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 131 static u_int32_t policy_id = 0; 132 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 133 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 134 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 135 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 136 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 137 138 static u_int32_t acq_seq = 0; 139 static int key_tick_init_random = 0; 140 141 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 142 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 143 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 144 /* registed list */ 145 #ifndef IPSEC_NONBLOCK_ACQUIRE 146 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 147 #endif 148 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 149 150 /* search order for SAs */ 151 static u_int saorder_state_valid[] = { 152 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 153 /* 154 * This order is important because we must select the oldest SA 155 * for outbound processing. For inbound, This is not important. 156 */ 157 }; 158 static u_int saorder_state_alive[] = { 159 /* except DEAD */ 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 161 }; 162 static u_int saorder_state_any[] = { 163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 164 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 165 }; 166 167 static const int minsize[] = { 168 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 169 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 170 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 171 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 172 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 173 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 174 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 175 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 176 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 177 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 178 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 179 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 180 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 181 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 182 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 183 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 184 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 185 0, /* SADB_X_EXT_KMPRIVATE */ 186 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 187 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 188 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 189 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 190 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 191 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OA */ 192 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 193 }; 194 static const int maxsize[] = { 195 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 196 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 200 0, /* SADB_EXT_ADDRESS_SRC */ 201 0, /* SADB_EXT_ADDRESS_DST */ 202 0, /* SADB_EXT_ADDRESS_PROXY */ 203 0, /* SADB_EXT_KEY_AUTH */ 204 0, /* SADB_EXT_KEY_ENCRYPT */ 205 0, /* SADB_EXT_IDENTITY_SRC */ 206 0, /* SADB_EXT_IDENTITY_DST */ 207 0, /* SADB_EXT_SENSITIVITY */ 208 0, /* SADB_EXT_PROPOSAL */ 209 0, /* SADB_EXT_SUPPORTED_AUTH */ 210 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 211 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 212 0, /* SADB_X_EXT_KMPRIVATE */ 213 0, /* SADB_X_EXT_POLICY */ 214 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 215 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 217 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 218 0, /* SADB_X_EXT_NAT_T_OA */ 219 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 220 }; 221 222 static int ipsec_esp_keymin = 256; 223 static int ipsec_esp_auth = 0; 224 static int ipsec_ah_keymin = 128; 225 226 #ifdef SYSCTL_DECL 227 SYSCTL_DECL(_net_key); 228 #endif 229 230 #ifdef SYSCTL_INT 231 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 232 &key_debug_level, 0, ""); 233 234 /* max count of trial for the decision of spi value */ 235 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 236 &key_spi_trycnt, 0, ""); 237 238 /* minimum spi value to allocate automatically. */ 239 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 240 &key_spi_minval, 0, ""); 241 242 /* maximun spi value to allocate automatically. */ 243 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 244 &key_spi_maxval, 0, ""); 245 246 /* interval to initialize randseed */ 247 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 248 &key_int_random, 0, ""); 249 250 /* lifetime for larval SA */ 251 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 252 &key_larval_lifetime, 0, ""); 253 254 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 255 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 256 &key_blockacq_count, 0, ""); 257 258 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 259 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 260 &key_blockacq_lifetime, 0, ""); 261 262 /* ESP auth */ 263 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 264 &ipsec_esp_auth, 0, ""); 265 266 /* minimum ESP key length */ 267 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 268 &ipsec_esp_keymin, 0, ""); 269 270 /* minimum AH key length */ 271 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 272 &ipsec_ah_keymin, 0, ""); 273 274 /* perfered old SA rather than new SA */ 275 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 276 &key_prefered_oldsa, 0, ""); 277 #endif /* SYSCTL_INT */ 278 279 #ifndef LIST_FOREACH 280 #define LIST_FOREACH(elm, head, field) \ 281 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 282 #endif 283 #define __LIST_CHAINED(elm) \ 284 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 285 #define LIST_INSERT_TAIL(head, elm, type, field) \ 286 do {\ 287 struct type *curelm = LIST_FIRST(head); \ 288 if (curelm == NULL) {\ 289 LIST_INSERT_HEAD(head, elm, field); \ 290 } else { \ 291 while (LIST_NEXT(curelm, field)) \ 292 curelm = LIST_NEXT(curelm, field);\ 293 LIST_INSERT_AFTER(curelm, elm, field);\ 294 }\ 295 } while (0) 296 297 #define KEY_CHKSASTATE(head, sav, name) \ 298 do { \ 299 if ((head) != (sav)) { \ 300 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 301 (name), (head), (sav))); \ 302 continue; \ 303 } \ 304 } while (0) 305 306 #define KEY_CHKSPDIR(head, sp, name) \ 307 do { \ 308 if ((head) != (sp)) { \ 309 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 310 "anyway continue.\n", \ 311 (name), (head), (sp))); \ 312 } \ 313 } while (0) 314 315 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 316 317 #if 1 318 #define KMALLOC(p, t, n) \ 319 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 320 #define KFREE(p) \ 321 free((p), M_SECA) 322 #else 323 #define KMALLOC(p, t, n) \ 324 do { \ 325 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 326 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 327 __FILE__, __LINE__, (p), #t, n); \ 328 } while (0) 329 330 #define KFREE(p) \ 331 do { \ 332 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 333 free((p), M_SECA); \ 334 } while (0) 335 #endif 336 337 /* 338 * set parameters into secpolicyindex buffer. 339 * Must allocate secpolicyindex buffer passed to this function. 340 */ 341 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 342 do { \ 343 bzero((idx), sizeof(struct secpolicyindex)); \ 344 (idx)->dir = (_dir); \ 345 (idx)->prefs = (ps); \ 346 (idx)->prefd = (pd); \ 347 (idx)->ul_proto = (ulp); \ 348 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 349 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 350 } while (0) 351 352 /* 353 * set parameters into secasindex buffer. 354 * Must allocate secasindex buffer before calling this function. 355 */ 356 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 357 do { \ 358 bzero((idx), sizeof(struct secasindex)); \ 359 (idx)->proto = (p); \ 360 (idx)->mode = (m); \ 361 (idx)->reqid = (r); \ 362 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 363 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 364 } while (0) 365 366 /* key statistics */ 367 struct _keystat { 368 u_long getspi_count; /* the avarage of count to try to get new SPI */ 369 } keystat; 370 371 struct sadb_msghdr { 372 struct sadb_msg *msg; 373 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 374 int extoff[SADB_EXT_MAX + 1]; 375 int extlen[SADB_EXT_MAX + 1]; 376 }; 377 378 static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 379 static void key_freesp_so __P((struct secpolicy **)); 380 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 381 static void key_delsp __P((struct secpolicy *)); 382 static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 383 static struct secpolicy *key_getspbyid __P((u_int32_t)); 384 static u_int16_t key_newreqid __P((void)); 385 static struct mbuf *key_gather_mbuf __P((struct mbuf *, 386 const struct sadb_msghdr *, int, int, ...)); 387 static int key_spdadd __P((struct socket *, struct mbuf *, 388 const struct sadb_msghdr *)); 389 static u_int32_t key_getnewspid __P((void)); 390 static int key_spddelete __P((struct socket *, struct mbuf *, 391 const struct sadb_msghdr *)); 392 static int key_spddelete2 __P((struct socket *, struct mbuf *, 393 const struct sadb_msghdr *)); 394 static int key_spdget __P((struct socket *, struct mbuf *, 395 const struct sadb_msghdr *)); 396 static int key_spdflush __P((struct socket *, struct mbuf *, 397 const struct sadb_msghdr *)); 398 static int key_spddump __P((struct socket *, struct mbuf *, 399 const struct sadb_msghdr *)); 400 static struct mbuf * key_setspddump __P((int *errorp, pid_t)); 401 static struct mbuf * key_setspddump_chain __P((int *errorp, int *lenp, pid_t pid)); 402 static struct mbuf *key_setdumpsp __P((struct secpolicy *, 403 u_int8_t, u_int32_t, pid_t)); 404 static u_int key_getspreqmsglen __P((struct secpolicy *)); 405 static int key_spdexpire __P((struct secpolicy *)); 406 static struct secashead *key_newsah __P((struct secasindex *)); 407 static void key_delsah __P((struct secashead *)); 408 static struct secasvar *key_newsav __P((struct mbuf *, 409 const struct sadb_msghdr *, struct secashead *, int *, 410 const char*, int)); 411 #define KEY_NEWSAV(m, sadb, sah, e) \ 412 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 413 static void key_delsav __P((struct secasvar *)); 414 static struct secashead *key_getsah __P((struct secasindex *)); 415 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 416 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 417 static int key_setsaval __P((struct secasvar *, struct mbuf *, 418 const struct sadb_msghdr *)); 419 static int key_mature __P((struct secasvar *)); 420 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 421 u_int8_t, u_int32_t, u_int32_t)); 422 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 423 u_int32_t, pid_t, u_int16_t)); 424 static struct mbuf *key_setsadbsa __P((struct secasvar *)); 425 static struct mbuf *key_setsadbaddr __P((u_int16_t, 426 const struct sockaddr *, u_int8_t, u_int16_t)); 427 #if 0 428 static struct mbuf *key_setsadbident __P((u_int16_t, u_int16_t, void *, 429 int, u_int64_t)); 430 #endif 431 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int16_t)); 432 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 433 u_int32_t)); 434 static void *key_newbuf __P((const void *, u_int)); 435 #ifdef INET6 436 static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 437 #endif 438 439 /* flags for key_cmpsaidx() */ 440 #define CMP_HEAD 1 /* protocol, addresses. */ 441 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 442 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 443 #define CMP_EXACTLY 4 /* all elements. */ 444 static int key_cmpsaidx 445 __P((const struct secasindex *, const struct secasindex *, int)); 446 447 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 448 static int key_bbcmp __P((const void *, const void *, u_int)); 449 static void key_srandom __P((void)); 450 static u_int16_t key_satype2proto __P((u_int8_t)); 451 static u_int8_t key_proto2satype __P((u_int16_t)); 452 453 static int key_getspi __P((struct socket *, struct mbuf *, 454 const struct sadb_msghdr *)); 455 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 456 struct secasindex *)); 457 static int key_update __P((struct socket *, struct mbuf *, 458 const struct sadb_msghdr *)); 459 #ifdef IPSEC_DOSEQCHECK 460 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 461 #endif 462 static int key_add __P((struct socket *, struct mbuf *, 463 const struct sadb_msghdr *)); 464 static int key_setident __P((struct secashead *, struct mbuf *, 465 const struct sadb_msghdr *)); 466 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 467 const struct sadb_msghdr *)); 468 static int key_delete __P((struct socket *, struct mbuf *, 469 const struct sadb_msghdr *)); 470 static int key_get __P((struct socket *, struct mbuf *, 471 const struct sadb_msghdr *)); 472 473 static void key_getcomb_setlifetime __P((struct sadb_comb *)); 474 static struct mbuf *key_getcomb_esp __P((void)); 475 static struct mbuf *key_getcomb_ah __P((void)); 476 static struct mbuf *key_getcomb_ipcomp __P((void)); 477 static struct mbuf *key_getprop __P((const struct secasindex *)); 478 479 static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 480 #ifndef IPSEC_NONBLOCK_ACQUIRE 481 static struct secacq *key_newacq __P((const struct secasindex *)); 482 static struct secacq *key_getacq __P((const struct secasindex *)); 483 static struct secacq *key_getacqbyseq __P((u_int32_t)); 484 #endif 485 static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 486 static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 487 static int key_acquire2 __P((struct socket *, struct mbuf *, 488 const struct sadb_msghdr *)); 489 static int key_register __P((struct socket *, struct mbuf *, 490 const struct sadb_msghdr *)); 491 static int key_expire __P((struct secasvar *)); 492 static int key_flush __P((struct socket *, struct mbuf *, 493 const struct sadb_msghdr *)); 494 static struct mbuf *key_setdump_chain __P((u_int8_t req_satype, int *errorp, 495 int *lenp, pid_t pid)); 496 static int key_dump __P((struct socket *, struct mbuf *, 497 const struct sadb_msghdr *)); 498 static int key_promisc __P((struct socket *, struct mbuf *, 499 const struct sadb_msghdr *)); 500 static int key_senderror __P((struct socket *, struct mbuf *, int)); 501 static int key_validate_ext __P((const struct sadb_ext *, int)); 502 static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 503 #if 0 504 static const char *key_getfqdn __P((void)); 505 static const char *key_getuserfqdn __P((void)); 506 #endif 507 static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 508 static inline void key_sp_dead __P((struct secpolicy *)); 509 static void key_sp_unlink __P((struct secpolicy *sp)); 510 511 static struct mbuf *key_alloc_mbuf __P((int)); 512 struct callout key_timehandler_ch; 513 514 #define SA_ADDREF(p) do { \ 515 (p)->refcnt++; \ 516 IPSEC_ASSERT((p)->refcnt != 0, \ 517 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 518 } while (0) 519 #define SA_DELREF(p) do { \ 520 IPSEC_ASSERT((p)->refcnt > 0, \ 521 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 522 (p)->refcnt--; \ 523 } while (0) 524 525 #define SP_ADDREF(p) do { \ 526 (p)->refcnt++; \ 527 IPSEC_ASSERT((p)->refcnt != 0, \ 528 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 529 } while (0) 530 #define SP_DELREF(p) do { \ 531 IPSEC_ASSERT((p)->refcnt > 0, \ 532 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 533 (p)->refcnt--; \ 534 } while (0) 535 536 537 static inline void 538 key_sp_dead(struct secpolicy *sp) 539 { 540 541 /* mark the SP dead */ 542 sp->state = IPSEC_SPSTATE_DEAD; 543 } 544 545 static void 546 key_sp_unlink(struct secpolicy *sp) 547 { 548 549 /* remove from SP index */ 550 if (__LIST_CHAINED(sp)) { 551 LIST_REMOVE(sp, chain); 552 /* Release refcount held just for being on chain */ 553 KEY_FREESP(&sp); 554 } 555 } 556 557 558 /* 559 * Return 0 when there are known to be no SP's for the specified 560 * direction. Otherwise return 1. This is used by IPsec code 561 * to optimize performance. 562 */ 563 int 564 key_havesp(u_int dir) 565 { 566 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 567 LIST_FIRST(&sptree[dir]) != NULL : 1); 568 } 569 570 /* %%% IPsec policy management */ 571 /* 572 * allocating a SP for OUTBOUND or INBOUND packet. 573 * Must call key_freesp() later. 574 * OUT: NULL: not found 575 * others: found and return the pointer. 576 */ 577 struct secpolicy * 578 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 579 { 580 struct secpolicy *sp; 581 int s; 582 583 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 584 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 585 ("key_allocsp: invalid direction %u", dir)); 586 587 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 588 printf("DP key_allocsp from %s:%u\n", where, tag)); 589 590 /* get a SP entry */ 591 s = splsoftnet(); /*called from softclock()*/ 592 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 593 printf("*** objects\n"); 594 kdebug_secpolicyindex(spidx)); 595 596 LIST_FOREACH(sp, &sptree[dir], chain) { 597 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 598 printf("*** in SPD\n"); 599 kdebug_secpolicyindex(&sp->spidx)); 600 601 if (sp->state == IPSEC_SPSTATE_DEAD) 602 continue; 603 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 604 goto found; 605 } 606 sp = NULL; 607 found: 608 if (sp) { 609 /* sanity check */ 610 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 611 612 /* found a SPD entry */ 613 sp->lastused = time_second; 614 SP_ADDREF(sp); 615 } 616 splx(s); 617 618 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 619 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 620 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 621 return sp; 622 } 623 624 /* 625 * allocating a SP for OUTBOUND or INBOUND packet. 626 * Must call key_freesp() later. 627 * OUT: NULL: not found 628 * others: found and return the pointer. 629 */ 630 struct secpolicy * 631 key_allocsp2(u_int32_t spi, 632 union sockaddr_union *dst, 633 u_int8_t proto, 634 u_int dir, 635 const char* where, int tag) 636 { 637 struct secpolicy *sp; 638 int s; 639 640 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 641 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 642 ("key_allocsp2: invalid direction %u", dir)); 643 644 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 645 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 646 647 /* get a SP entry */ 648 s = splsoftnet(); /*called from softclock()*/ 649 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 650 printf("*** objects\n"); 651 printf("spi %u proto %u dir %u\n", spi, proto, dir); 652 kdebug_sockaddr(&dst->sa)); 653 654 LIST_FOREACH(sp, &sptree[dir], chain) { 655 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 656 printf("*** in SPD\n"); 657 kdebug_secpolicyindex(&sp->spidx)); 658 659 if (sp->state == IPSEC_SPSTATE_DEAD) 660 continue; 661 /* compare simple values, then dst address */ 662 if (sp->spidx.ul_proto != proto) 663 continue; 664 /* NB: spi's must exist and match */ 665 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 666 continue; 667 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 668 goto found; 669 } 670 sp = NULL; 671 found: 672 if (sp) { 673 /* sanity check */ 674 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 675 676 /* found a SPD entry */ 677 sp->lastused = time_second; 678 SP_ADDREF(sp); 679 } 680 splx(s); 681 682 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 683 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 684 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 685 return sp; 686 } 687 688 /* 689 * return a policy that matches this particular inbound packet. 690 * XXX slow 691 */ 692 struct secpolicy * 693 key_gettunnel(const struct sockaddr *osrc, 694 const struct sockaddr *odst, 695 const struct sockaddr *isrc, 696 const struct sockaddr *idst, 697 const char* where, int tag) 698 { 699 struct secpolicy *sp; 700 const int dir = IPSEC_DIR_INBOUND; 701 int s; 702 struct ipsecrequest *r1, *r2, *p; 703 struct secpolicyindex spidx; 704 705 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 706 printf("DP key_gettunnel from %s:%u\n", where, tag)); 707 708 if (isrc->sa_family != idst->sa_family) { 709 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 710 isrc->sa_family, idst->sa_family)); 711 sp = NULL; 712 goto done; 713 } 714 715 s = splsoftnet(); /*called from softclock()*/ 716 LIST_FOREACH(sp, &sptree[dir], chain) { 717 if (sp->state == IPSEC_SPSTATE_DEAD) 718 continue; 719 720 r1 = r2 = NULL; 721 for (p = sp->req; p; p = p->next) { 722 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 723 continue; 724 725 r1 = r2; 726 r2 = p; 727 728 if (!r1) { 729 /* here we look at address matches only */ 730 spidx = sp->spidx; 731 if (isrc->sa_len > sizeof(spidx.src) || 732 idst->sa_len > sizeof(spidx.dst)) 733 continue; 734 bcopy(isrc, &spidx.src, isrc->sa_len); 735 bcopy(idst, &spidx.dst, idst->sa_len); 736 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 737 continue; 738 } else { 739 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 740 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 741 continue; 742 } 743 744 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 745 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 746 continue; 747 748 goto found; 749 } 750 } 751 sp = NULL; 752 found: 753 if (sp) { 754 sp->lastused = time_second; 755 SP_ADDREF(sp); 756 } 757 splx(s); 758 done: 759 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 760 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 761 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 762 return sp; 763 } 764 765 /* 766 * allocating an SA entry for an *OUTBOUND* packet. 767 * checking each request entries in SP, and acquire an SA if need. 768 * OUT: 0: there are valid requests. 769 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 770 */ 771 int 772 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 773 { 774 u_int level; 775 int error; 776 777 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 778 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 779 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 780 saidx->mode == IPSEC_MODE_TUNNEL, 781 ("key_checkrequest: unexpected policy %u", saidx->mode)); 782 783 /* get current level */ 784 level = ipsec_get_reqlevel(isr); 785 786 /* 787 * XXX guard against protocol callbacks from the crypto 788 * thread as they reference ipsecrequest.sav which we 789 * temporarily null out below. Need to rethink how we 790 * handle bundled SA's in the callback thread. 791 */ 792 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 793 #if 0 794 /* 795 * We do allocate new SA only if the state of SA in the holder is 796 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 797 */ 798 if (isr->sav != NULL) { 799 if (isr->sav->sah == NULL) 800 panic("key_checkrequest: sah is null"); 801 if (isr->sav == (struct secasvar *)LIST_FIRST( 802 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 803 KEY_FREESAV(&isr->sav); 804 isr->sav = NULL; 805 } 806 } 807 #else 808 /* 809 * we free any SA stashed in the IPsec request because a different 810 * SA may be involved each time this request is checked, either 811 * because new SAs are being configured, or this request is 812 * associated with an unconnected datagram socket, or this request 813 * is associated with a system default policy. 814 * 815 * The operation may have negative impact to performance. We may 816 * want to check cached SA carefully, rather than picking new SA 817 * every time. 818 */ 819 if (isr->sav != NULL) { 820 KEY_FREESAV(&isr->sav); 821 isr->sav = NULL; 822 } 823 #endif 824 825 /* 826 * new SA allocation if no SA found. 827 * key_allocsa_policy should allocate the oldest SA available. 828 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 829 */ 830 if (isr->sav == NULL) 831 isr->sav = key_allocsa_policy(saidx); 832 833 /* When there is SA. */ 834 if (isr->sav != NULL) { 835 if (isr->sav->state != SADB_SASTATE_MATURE && 836 isr->sav->state != SADB_SASTATE_DYING) 837 return EINVAL; 838 return 0; 839 } 840 841 /* there is no SA */ 842 error = key_acquire(saidx, isr->sp); 843 if (error != 0) { 844 /* XXX What should I do ? */ 845 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 846 "from key_acquire.\n", error)); 847 return error; 848 } 849 850 if (level != IPSEC_LEVEL_REQUIRE) { 851 /* XXX sigh, the interface to this routine is botched */ 852 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 853 return 0; 854 } else { 855 return ENOENT; 856 } 857 } 858 859 /* 860 * allocating a SA for policy entry from SAD. 861 * NOTE: searching SAD of aliving state. 862 * OUT: NULL: not found. 863 * others: found and return the pointer. 864 */ 865 static struct secasvar * 866 key_allocsa_policy(const struct secasindex *saidx) 867 { 868 struct secashead *sah; 869 struct secasvar *sav; 870 u_int stateidx, state; 871 872 LIST_FOREACH(sah, &sahtree, chain) { 873 if (sah->state == SADB_SASTATE_DEAD) 874 continue; 875 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 876 goto found; 877 } 878 879 return NULL; 880 881 found: 882 883 /* search valid state */ 884 for (stateidx = 0; 885 stateidx < _ARRAYLEN(saorder_state_valid); 886 stateidx++) { 887 888 state = saorder_state_valid[stateidx]; 889 890 sav = key_do_allocsa_policy(sah, state); 891 if (sav != NULL) 892 return sav; 893 } 894 895 return NULL; 896 } 897 898 /* 899 * searching SAD with direction, protocol, mode and state. 900 * called by key_allocsa_policy(). 901 * OUT: 902 * NULL : not found 903 * others : found, pointer to a SA. 904 */ 905 static struct secasvar * 906 key_do_allocsa_policy(struct secashead *sah, u_int state) 907 { 908 struct secasvar *sav, *nextsav, *candidate, *d; 909 910 /* initilize */ 911 candidate = NULL; 912 913 for (sav = LIST_FIRST(&sah->savtree[state]); 914 sav != NULL; 915 sav = nextsav) { 916 917 nextsav = LIST_NEXT(sav, chain); 918 919 /* sanity check */ 920 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 921 922 /* initialize */ 923 if (candidate == NULL) { 924 candidate = sav; 925 continue; 926 } 927 928 /* Which SA is the better ? */ 929 930 /* sanity check 2 */ 931 if (candidate->lft_c == NULL || sav->lft_c == NULL) 932 panic("key_do_allocsa_policy: " 933 "lifetime_current is NULL"); 934 935 /* What the best method is to compare ? */ 936 if (key_prefered_oldsa) { 937 if (candidate->lft_c->sadb_lifetime_addtime > 938 sav->lft_c->sadb_lifetime_addtime) { 939 candidate = sav; 940 } 941 continue; 942 /*NOTREACHED*/ 943 } 944 945 /* prefered new sa rather than old sa */ 946 if (candidate->lft_c->sadb_lifetime_addtime < 947 sav->lft_c->sadb_lifetime_addtime) { 948 d = candidate; 949 candidate = sav; 950 } else 951 d = sav; 952 953 /* 954 * prepared to delete the SA when there is more 955 * suitable candidate and the lifetime of the SA is not 956 * permanent. 957 */ 958 if (d->lft_c->sadb_lifetime_addtime != 0) { 959 struct mbuf *m, *result; 960 961 key_sa_chgstate(d, SADB_SASTATE_DEAD); 962 963 IPSEC_ASSERT(d->refcnt > 0, 964 ("key_do_allocsa_policy: bogus ref count")); 965 m = key_setsadbmsg(SADB_DELETE, 0, 966 d->sah->saidx.proto, 0, 0, d->refcnt - 1); 967 if (!m) 968 goto msgfail; 969 result = m; 970 971 /* set sadb_address for saidx's. */ 972 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 973 &d->sah->saidx.src.sa, 974 d->sah->saidx.src.sa.sa_len << 3, 975 IPSEC_ULPROTO_ANY); 976 if (!m) 977 goto msgfail; 978 m_cat(result, m); 979 980 /* set sadb_address for saidx's. */ 981 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 982 &d->sah->saidx.src.sa, 983 d->sah->saidx.src.sa.sa_len << 3, 984 IPSEC_ULPROTO_ANY); 985 if (!m) 986 goto msgfail; 987 m_cat(result, m); 988 989 /* create SA extension */ 990 m = key_setsadbsa(d); 991 if (!m) 992 goto msgfail; 993 m_cat(result, m); 994 995 if (result->m_len < sizeof(struct sadb_msg)) { 996 result = m_pullup(result, 997 sizeof(struct sadb_msg)); 998 if (result == NULL) 999 goto msgfail; 1000 } 1001 1002 result->m_pkthdr.len = 0; 1003 for (m = result; m; m = m->m_next) 1004 result->m_pkthdr.len += m->m_len; 1005 mtod(result, struct sadb_msg *)->sadb_msg_len = 1006 PFKEY_UNIT64(result->m_pkthdr.len); 1007 1008 if (key_sendup_mbuf(NULL, result, 1009 KEY_SENDUP_REGISTERED)) 1010 goto msgfail; 1011 msgfail: 1012 KEY_FREESAV(&d); 1013 } 1014 } 1015 1016 if (candidate) { 1017 SA_ADDREF(candidate); 1018 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1019 printf("DP allocsa_policy cause " 1020 "refcnt++:%d SA:%p\n", 1021 candidate->refcnt, candidate)); 1022 } 1023 return candidate; 1024 } 1025 1026 /* 1027 * allocating a usable SA entry for a *INBOUND* packet. 1028 * Must call key_freesav() later. 1029 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1030 * NULL: not found, or error occurred. 1031 * 1032 * In the comparison, no source address is used--for RFC2401 conformance. 1033 * To quote, from section 4.1: 1034 * A security association is uniquely identified by a triple consisting 1035 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1036 * security protocol (AH or ESP) identifier. 1037 * Note that, however, we do need to keep source address in IPsec SA. 1038 * IKE specification and PF_KEY specification do assume that we 1039 * keep source address in IPsec SA. We see a tricky situation here. 1040 */ 1041 struct secasvar * 1042 key_allocsa( 1043 const union sockaddr_union *dst, 1044 u_int proto, 1045 u_int32_t spi, 1046 const char* where, int tag) 1047 { 1048 struct secashead *sah; 1049 struct secasvar *sav; 1050 u_int stateidx, state; 1051 int s; 1052 1053 int must_check_spi = 1; 1054 int must_check_alg = 0; 1055 u_int16_t cpi = 0; 1056 u_int8_t algo = 0; 1057 1058 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1059 1060 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1061 printf("DP key_allocsa from %s:%u\n", where, tag)); 1062 1063 /* 1064 * XXX IPCOMP case 1065 * We use cpi to define spi here. In the case where cpi <= 1066 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1067 * the real spi. In this case, don't check the spi but check the 1068 * algorithm 1069 */ 1070 1071 if (proto == IPPROTO_IPCOMP) { 1072 u_int32_t tmp; 1073 tmp = ntohl(spi); 1074 cpi = (u_int16_t) tmp; 1075 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1076 algo = (u_int8_t) cpi; 1077 must_check_spi = 0; 1078 must_check_alg = 1; 1079 } 1080 } 1081 1082 /* 1083 * searching SAD. 1084 * XXX: to be checked internal IP header somewhere. Also when 1085 * IPsec tunnel packet is received. But ESP tunnel mode is 1086 * encrypted so we can't check internal IP header. 1087 */ 1088 s = splsoftnet(); /*called from softclock()*/ 1089 LIST_FOREACH(sah, &sahtree, chain) { 1090 /* search valid state */ 1091 for (stateidx = 0; 1092 stateidx < _ARRAYLEN(saorder_state_valid); 1093 stateidx++) { 1094 state = saorder_state_valid[stateidx]; 1095 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1096 /* sanity check */ 1097 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1098 /* do not return entries w/ unusable state */ 1099 if (sav->state != SADB_SASTATE_MATURE && 1100 sav->state != SADB_SASTATE_DYING) 1101 continue; 1102 if (proto != sav->sah->saidx.proto) 1103 continue; 1104 if (must_check_spi && spi != sav->spi) 1105 continue; 1106 /* XXX only on the ipcomp case */ 1107 if (must_check_alg && algo != sav->alg_comp) 1108 continue; 1109 1110 #if 0 /* don't check src */ 1111 /* check src address */ 1112 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1113 continue; 1114 #endif 1115 /* check dst address */ 1116 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0) 1117 continue; 1118 SA_ADDREF(sav); 1119 goto done; 1120 } 1121 } 1122 } 1123 sav = NULL; 1124 done: 1125 splx(s); 1126 1127 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1128 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1129 sav, sav ? sav->refcnt : 0)); 1130 return sav; 1131 } 1132 1133 /* 1134 * Must be called after calling key_allocsp(). 1135 * For both the packet without socket and key_freeso(). 1136 */ 1137 void 1138 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1139 { 1140 struct secpolicy *sp = *spp; 1141 1142 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1143 1144 SP_DELREF(sp); 1145 1146 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1147 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1148 sp, sp->id, where, tag, sp->refcnt)); 1149 1150 if (sp->refcnt == 0) { 1151 *spp = NULL; 1152 key_delsp(sp); 1153 } 1154 } 1155 1156 /* 1157 * Must be called after calling key_allocsp(). 1158 * For the packet with socket. 1159 */ 1160 void 1161 key_freeso(struct socket *so) 1162 { 1163 /* sanity check */ 1164 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1165 1166 switch (so->so_proto->pr_domain->dom_family) { 1167 #ifdef INET 1168 case PF_INET: 1169 { 1170 struct inpcb *pcb = sotoinpcb(so); 1171 1172 /* Does it have a PCB ? */ 1173 if (pcb == NULL) 1174 return; 1175 key_freesp_so(&pcb->inp_sp->sp_in); 1176 key_freesp_so(&pcb->inp_sp->sp_out); 1177 } 1178 break; 1179 #endif 1180 #ifdef INET6 1181 case PF_INET6: 1182 { 1183 #ifdef HAVE_NRL_INPCB 1184 struct inpcb *pcb = sotoinpcb(so); 1185 1186 /* Does it have a PCB ? */ 1187 if (pcb == NULL) 1188 return; 1189 key_freesp_so(&pcb->inp_sp->sp_in); 1190 key_freesp_so(&pcb->inp_sp->sp_out); 1191 #else 1192 struct in6pcb *pcb = sotoin6pcb(so); 1193 1194 /* Does it have a PCB ? */ 1195 if (pcb == NULL) 1196 return; 1197 key_freesp_so(&pcb->in6p_sp->sp_in); 1198 key_freesp_so(&pcb->in6p_sp->sp_out); 1199 #endif 1200 } 1201 break; 1202 #endif /* INET6 */ 1203 default: 1204 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1205 so->so_proto->pr_domain->dom_family)); 1206 return; 1207 } 1208 } 1209 1210 static void 1211 key_freesp_so(struct secpolicy **sp) 1212 { 1213 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1214 1215 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1216 (*sp)->policy == IPSEC_POLICY_BYPASS) 1217 return; 1218 1219 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1220 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1221 KEY_FREESP(sp); 1222 } 1223 1224 /* 1225 * Must be called after calling key_allocsa(). 1226 * This function is called by key_freesp() to free some SA allocated 1227 * for a policy. 1228 */ 1229 void 1230 key_freesav(struct secasvar **psav, const char* where, int tag) 1231 { 1232 struct secasvar *sav = *psav; 1233 1234 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1235 1236 SA_DELREF(sav); 1237 1238 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1239 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1240 sav, (u_long)ntohl(sav->spi), 1241 where, tag, sav->refcnt)); 1242 1243 if (sav->refcnt == 0) { 1244 *psav = NULL; 1245 key_delsav(sav); 1246 } 1247 } 1248 1249 /* %%% SPD management */ 1250 /* 1251 * free security policy entry. 1252 */ 1253 static void 1254 key_delsp(struct secpolicy *sp) 1255 { 1256 int s; 1257 1258 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1259 1260 key_sp_dead(sp); 1261 1262 IPSEC_ASSERT(sp->refcnt == 0, 1263 ("key_delsp: SP with references deleted (refcnt %u)", 1264 sp->refcnt)); 1265 1266 s = splsoftnet(); /*called from softclock()*/ 1267 1268 { 1269 struct ipsecrequest *isr = sp->req, *nextisr; 1270 1271 while (isr != NULL) { 1272 if (isr->sav != NULL) { 1273 KEY_FREESAV(&isr->sav); 1274 isr->sav = NULL; 1275 } 1276 1277 nextisr = isr->next; 1278 KFREE(isr); 1279 isr = nextisr; 1280 } 1281 } 1282 1283 KFREE(sp); 1284 1285 splx(s); 1286 } 1287 1288 /* 1289 * search SPD 1290 * OUT: NULL : not found 1291 * others : found, pointer to a SP. 1292 */ 1293 static struct secpolicy * 1294 key_getsp(struct secpolicyindex *spidx) 1295 { 1296 struct secpolicy *sp; 1297 1298 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1299 1300 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1301 if (sp->state == IPSEC_SPSTATE_DEAD) 1302 continue; 1303 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1304 SP_ADDREF(sp); 1305 return sp; 1306 } 1307 } 1308 1309 return NULL; 1310 } 1311 1312 /* 1313 * get SP by index. 1314 * OUT: NULL : not found 1315 * others : found, pointer to a SP. 1316 */ 1317 static struct secpolicy * 1318 key_getspbyid(u_int32_t id) 1319 { 1320 struct secpolicy *sp; 1321 1322 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1323 if (sp->state == IPSEC_SPSTATE_DEAD) 1324 continue; 1325 if (sp->id == id) { 1326 SP_ADDREF(sp); 1327 return sp; 1328 } 1329 } 1330 1331 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1332 if (sp->state == IPSEC_SPSTATE_DEAD) 1333 continue; 1334 if (sp->id == id) { 1335 SP_ADDREF(sp); 1336 return sp; 1337 } 1338 } 1339 1340 return NULL; 1341 } 1342 1343 struct secpolicy * 1344 key_newsp(const char* where, int tag) 1345 { 1346 struct secpolicy *newsp = NULL; 1347 1348 newsp = (struct secpolicy *) 1349 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1350 if (newsp) { 1351 newsp->refcnt = 1; 1352 newsp->req = NULL; 1353 } 1354 1355 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1356 printf("DP key_newsp from %s:%u return SP:%p\n", 1357 where, tag, newsp)); 1358 return newsp; 1359 } 1360 1361 /* 1362 * create secpolicy structure from sadb_x_policy structure. 1363 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1364 * so must be set properly later. 1365 */ 1366 struct secpolicy * 1367 key_msg2sp(xpl0, len, error) 1368 struct sadb_x_policy *xpl0; 1369 size_t len; 1370 int *error; 1371 { 1372 struct secpolicy *newsp; 1373 1374 /* sanity check */ 1375 if (xpl0 == NULL) 1376 panic("key_msg2sp: NULL pointer was passed"); 1377 if (len < sizeof(*xpl0)) 1378 panic("key_msg2sp: invalid length"); 1379 if (len != PFKEY_EXTLEN(xpl0)) { 1380 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1381 *error = EINVAL; 1382 return NULL; 1383 } 1384 1385 if ((newsp = KEY_NEWSP()) == NULL) { 1386 *error = ENOBUFS; 1387 return NULL; 1388 } 1389 1390 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1391 newsp->policy = xpl0->sadb_x_policy_type; 1392 1393 /* check policy */ 1394 switch (xpl0->sadb_x_policy_type) { 1395 case IPSEC_POLICY_DISCARD: 1396 case IPSEC_POLICY_NONE: 1397 case IPSEC_POLICY_ENTRUST: 1398 case IPSEC_POLICY_BYPASS: 1399 newsp->req = NULL; 1400 break; 1401 1402 case IPSEC_POLICY_IPSEC: 1403 { 1404 int tlen; 1405 struct sadb_x_ipsecrequest *xisr; 1406 struct ipsecrequest **p_isr = &newsp->req; 1407 1408 /* validity check */ 1409 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1410 ipseclog((LOG_DEBUG, 1411 "key_msg2sp: Invalid msg length.\n")); 1412 KEY_FREESP(&newsp); 1413 *error = EINVAL; 1414 return NULL; 1415 } 1416 1417 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1418 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1419 1420 while (tlen > 0) { 1421 /* length check */ 1422 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1423 ipseclog((LOG_DEBUG, "key_msg2sp: " 1424 "invalid ipsecrequest length.\n")); 1425 KEY_FREESP(&newsp); 1426 *error = EINVAL; 1427 return NULL; 1428 } 1429 1430 /* allocate request buffer */ 1431 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1432 if ((*p_isr) == NULL) { 1433 ipseclog((LOG_DEBUG, 1434 "key_msg2sp: No more memory.\n")); 1435 KEY_FREESP(&newsp); 1436 *error = ENOBUFS; 1437 return NULL; 1438 } 1439 bzero(*p_isr, sizeof(**p_isr)); 1440 1441 /* set values */ 1442 (*p_isr)->next = NULL; 1443 1444 switch (xisr->sadb_x_ipsecrequest_proto) { 1445 case IPPROTO_ESP: 1446 case IPPROTO_AH: 1447 case IPPROTO_IPCOMP: 1448 break; 1449 default: 1450 ipseclog((LOG_DEBUG, 1451 "key_msg2sp: invalid proto type=%u\n", 1452 xisr->sadb_x_ipsecrequest_proto)); 1453 KEY_FREESP(&newsp); 1454 *error = EPROTONOSUPPORT; 1455 return NULL; 1456 } 1457 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1458 1459 switch (xisr->sadb_x_ipsecrequest_mode) { 1460 case IPSEC_MODE_TRANSPORT: 1461 case IPSEC_MODE_TUNNEL: 1462 break; 1463 case IPSEC_MODE_ANY: 1464 default: 1465 ipseclog((LOG_DEBUG, 1466 "key_msg2sp: invalid mode=%u\n", 1467 xisr->sadb_x_ipsecrequest_mode)); 1468 KEY_FREESP(&newsp); 1469 *error = EINVAL; 1470 return NULL; 1471 } 1472 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1473 1474 switch (xisr->sadb_x_ipsecrequest_level) { 1475 case IPSEC_LEVEL_DEFAULT: 1476 case IPSEC_LEVEL_USE: 1477 case IPSEC_LEVEL_REQUIRE: 1478 break; 1479 case IPSEC_LEVEL_UNIQUE: 1480 /* validity check */ 1481 /* 1482 * If range violation of reqid, kernel will 1483 * update it, don't refuse it. 1484 */ 1485 if (xisr->sadb_x_ipsecrequest_reqid 1486 > IPSEC_MANUAL_REQID_MAX) { 1487 ipseclog((LOG_DEBUG, 1488 "key_msg2sp: reqid=%d range " 1489 "violation, updated by kernel.\n", 1490 xisr->sadb_x_ipsecrequest_reqid)); 1491 xisr->sadb_x_ipsecrequest_reqid = 0; 1492 } 1493 1494 /* allocate new reqid id if reqid is zero. */ 1495 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1496 u_int16_t reqid; 1497 if ((reqid = key_newreqid()) == 0) { 1498 KEY_FREESP(&newsp); 1499 *error = ENOBUFS; 1500 return NULL; 1501 } 1502 (*p_isr)->saidx.reqid = reqid; 1503 xisr->sadb_x_ipsecrequest_reqid = reqid; 1504 } else { 1505 /* set it for manual keying. */ 1506 (*p_isr)->saidx.reqid = 1507 xisr->sadb_x_ipsecrequest_reqid; 1508 } 1509 break; 1510 1511 default: 1512 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1513 xisr->sadb_x_ipsecrequest_level)); 1514 KEY_FREESP(&newsp); 1515 *error = EINVAL; 1516 return NULL; 1517 } 1518 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1519 1520 /* set IP addresses if there */ 1521 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1522 struct sockaddr *paddr; 1523 1524 paddr = (struct sockaddr *)(xisr + 1); 1525 1526 /* validity check */ 1527 if (paddr->sa_len 1528 > sizeof((*p_isr)->saidx.src)) { 1529 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1530 "address length.\n")); 1531 KEY_FREESP(&newsp); 1532 *error = EINVAL; 1533 return NULL; 1534 } 1535 bcopy(paddr, &(*p_isr)->saidx.src, 1536 paddr->sa_len); 1537 1538 paddr = (struct sockaddr *)((char *)paddr 1539 + paddr->sa_len); 1540 1541 /* validity check */ 1542 if (paddr->sa_len 1543 > sizeof((*p_isr)->saidx.dst)) { 1544 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1545 "address length.\n")); 1546 KEY_FREESP(&newsp); 1547 *error = EINVAL; 1548 return NULL; 1549 } 1550 bcopy(paddr, &(*p_isr)->saidx.dst, 1551 paddr->sa_len); 1552 } 1553 1554 (*p_isr)->sav = NULL; 1555 (*p_isr)->sp = newsp; 1556 1557 /* initialization for the next. */ 1558 p_isr = &(*p_isr)->next; 1559 tlen -= xisr->sadb_x_ipsecrequest_len; 1560 1561 /* validity check */ 1562 if (tlen < 0) { 1563 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1564 KEY_FREESP(&newsp); 1565 *error = EINVAL; 1566 return NULL; 1567 } 1568 1569 xisr = (struct sadb_x_ipsecrequest *)((char *)xisr 1570 + xisr->sadb_x_ipsecrequest_len); 1571 } 1572 } 1573 break; 1574 default: 1575 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1576 KEY_FREESP(&newsp); 1577 *error = EINVAL; 1578 return NULL; 1579 } 1580 1581 *error = 0; 1582 return newsp; 1583 } 1584 1585 static u_int16_t 1586 key_newreqid() 1587 { 1588 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1589 1590 auto_reqid = (auto_reqid == 0xffff 1591 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1592 1593 /* XXX should be unique check */ 1594 1595 return auto_reqid; 1596 } 1597 1598 /* 1599 * copy secpolicy struct to sadb_x_policy structure indicated. 1600 */ 1601 struct mbuf * 1602 key_sp2msg(sp) 1603 struct secpolicy *sp; 1604 { 1605 struct sadb_x_policy *xpl; 1606 int tlen; 1607 char *p; 1608 struct mbuf *m; 1609 1610 /* sanity check. */ 1611 if (sp == NULL) 1612 panic("key_sp2msg: NULL pointer was passed"); 1613 1614 tlen = key_getspreqmsglen(sp); 1615 1616 m = key_alloc_mbuf(tlen); 1617 if (!m || m->m_next) { /*XXX*/ 1618 if (m) 1619 m_freem(m); 1620 return NULL; 1621 } 1622 1623 m->m_len = tlen; 1624 m->m_next = NULL; 1625 xpl = mtod(m, struct sadb_x_policy *); 1626 bzero(xpl, tlen); 1627 1628 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1629 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1630 xpl->sadb_x_policy_type = sp->policy; 1631 xpl->sadb_x_policy_dir = sp->spidx.dir; 1632 xpl->sadb_x_policy_id = sp->id; 1633 p = (char *)xpl + sizeof(*xpl); 1634 1635 /* if is the policy for ipsec ? */ 1636 if (sp->policy == IPSEC_POLICY_IPSEC) { 1637 struct sadb_x_ipsecrequest *xisr; 1638 struct ipsecrequest *isr; 1639 1640 for (isr = sp->req; isr != NULL; isr = isr->next) { 1641 1642 xisr = (struct sadb_x_ipsecrequest *)p; 1643 1644 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1645 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1646 xisr->sadb_x_ipsecrequest_level = isr->level; 1647 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1648 1649 p += sizeof(*xisr); 1650 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1651 p += isr->saidx.src.sa.sa_len; 1652 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1653 p += isr->saidx.src.sa.sa_len; 1654 1655 xisr->sadb_x_ipsecrequest_len = 1656 PFKEY_ALIGN8(sizeof(*xisr) 1657 + isr->saidx.src.sa.sa_len 1658 + isr->saidx.dst.sa.sa_len); 1659 } 1660 } 1661 1662 return m; 1663 } 1664 1665 /* m will not be freed nor modified */ 1666 static struct mbuf * 1667 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1668 int ndeep, int nitem, ...) 1669 { 1670 va_list ap; 1671 int idx; 1672 int i; 1673 struct mbuf *result = NULL, *n; 1674 int len; 1675 1676 if (m == NULL || mhp == NULL) 1677 panic("null pointer passed to key_gather"); 1678 1679 va_start(ap, nitem); 1680 for (i = 0; i < nitem; i++) { 1681 idx = va_arg(ap, int); 1682 if (idx < 0 || idx > SADB_EXT_MAX) 1683 goto fail; 1684 /* don't attempt to pull empty extension */ 1685 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1686 continue; 1687 if (idx != SADB_EXT_RESERVED && 1688 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1689 continue; 1690 1691 if (idx == SADB_EXT_RESERVED) { 1692 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1693 #ifdef DIAGNOSTIC 1694 if (len > MHLEN) 1695 panic("assumption failed"); 1696 #endif 1697 MGETHDR(n, M_DONTWAIT, MT_DATA); 1698 if (!n) 1699 goto fail; 1700 n->m_len = len; 1701 n->m_next = NULL; 1702 m_copydata(m, 0, sizeof(struct sadb_msg), 1703 mtod(n, void *)); 1704 } else if (i < ndeep) { 1705 len = mhp->extlen[idx]; 1706 n = key_alloc_mbuf(len); 1707 if (!n || n->m_next) { /*XXX*/ 1708 if (n) 1709 m_freem(n); 1710 goto fail; 1711 } 1712 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1713 mtod(n, void *)); 1714 } else { 1715 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1716 M_DONTWAIT); 1717 } 1718 if (n == NULL) 1719 goto fail; 1720 1721 if (result) 1722 m_cat(result, n); 1723 else 1724 result = n; 1725 } 1726 va_end(ap); 1727 1728 if ((result->m_flags & M_PKTHDR) != 0) { 1729 result->m_pkthdr.len = 0; 1730 for (n = result; n; n = n->m_next) 1731 result->m_pkthdr.len += n->m_len; 1732 } 1733 1734 return result; 1735 1736 fail: 1737 va_end(ap); 1738 m_freem(result); 1739 return NULL; 1740 } 1741 1742 /* 1743 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1744 * add an entry to SP database, when received 1745 * <base, address(SD), (lifetime(H),) policy> 1746 * from the user(?). 1747 * Adding to SP database, 1748 * and send 1749 * <base, address(SD), (lifetime(H),) policy> 1750 * to the socket which was send. 1751 * 1752 * SPDADD set a unique policy entry. 1753 * SPDSETIDX like SPDADD without a part of policy requests. 1754 * SPDUPDATE replace a unique policy entry. 1755 * 1756 * m will always be freed. 1757 */ 1758 static int 1759 key_spdadd(so, m, mhp) 1760 struct socket *so; 1761 struct mbuf *m; 1762 const struct sadb_msghdr *mhp; 1763 { 1764 struct sadb_address *src0, *dst0; 1765 struct sadb_x_policy *xpl0, *xpl; 1766 struct sadb_lifetime *lft = NULL; 1767 struct secpolicyindex spidx; 1768 struct secpolicy *newsp; 1769 int error; 1770 1771 /* sanity check */ 1772 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1773 panic("key_spdadd: NULL pointer is passed"); 1774 1775 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1776 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1777 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1778 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1779 return key_senderror(so, m, EINVAL); 1780 } 1781 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1782 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1783 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1784 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1785 return key_senderror(so, m, EINVAL); 1786 } 1787 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1788 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1789 < sizeof(struct sadb_lifetime)) { 1790 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1791 return key_senderror(so, m, EINVAL); 1792 } 1793 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1794 } 1795 1796 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1797 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1798 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1799 1800 /* make secindex */ 1801 /* XXX boundary check against sa_len */ 1802 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1803 src0 + 1, 1804 dst0 + 1, 1805 src0->sadb_address_prefixlen, 1806 dst0->sadb_address_prefixlen, 1807 src0->sadb_address_proto, 1808 &spidx); 1809 1810 /* checking the direciton. */ 1811 switch (xpl0->sadb_x_policy_dir) { 1812 case IPSEC_DIR_INBOUND: 1813 case IPSEC_DIR_OUTBOUND: 1814 break; 1815 default: 1816 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1817 mhp->msg->sadb_msg_errno = EINVAL; 1818 return 0; 1819 } 1820 1821 /* check policy */ 1822 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1823 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1824 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1825 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1826 return key_senderror(so, m, EINVAL); 1827 } 1828 1829 /* policy requests are mandatory when action is ipsec. */ 1830 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1831 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1832 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1833 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1834 return key_senderror(so, m, EINVAL); 1835 } 1836 1837 /* 1838 * checking there is SP already or not. 1839 * SPDUPDATE doesn't depend on whether there is a SP or not. 1840 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1841 * then error. 1842 */ 1843 newsp = key_getsp(&spidx); 1844 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1845 if (newsp) { 1846 key_sp_dead(newsp); 1847 key_sp_unlink(newsp); /* XXX jrs ordering */ 1848 KEY_FREESP(&newsp); 1849 newsp = NULL; 1850 } 1851 } else { 1852 if (newsp != NULL) { 1853 KEY_FREESP(&newsp); 1854 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1855 return key_senderror(so, m, EEXIST); 1856 } 1857 } 1858 1859 /* allocation new SP entry */ 1860 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1861 return key_senderror(so, m, error); 1862 } 1863 1864 if ((newsp->id = key_getnewspid()) == 0) { 1865 KFREE(newsp); 1866 return key_senderror(so, m, ENOBUFS); 1867 } 1868 1869 /* XXX boundary check against sa_len */ 1870 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1871 src0 + 1, 1872 dst0 + 1, 1873 src0->sadb_address_prefixlen, 1874 dst0->sadb_address_prefixlen, 1875 src0->sadb_address_proto, 1876 &newsp->spidx); 1877 1878 /* sanity check on addr pair */ 1879 if (((struct sockaddr *)(src0 + 1))->sa_family != 1880 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1881 KFREE(newsp); 1882 return key_senderror(so, m, EINVAL); 1883 } 1884 if (((struct sockaddr *)(src0 + 1))->sa_len != 1885 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1886 KFREE(newsp); 1887 return key_senderror(so, m, EINVAL); 1888 } 1889 #if 1 1890 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1891 struct sockaddr *sa; 1892 sa = (struct sockaddr *)(src0 + 1); 1893 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1894 KFREE(newsp); 1895 return key_senderror(so, m, EINVAL); 1896 } 1897 } 1898 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1899 struct sockaddr *sa; 1900 sa = (struct sockaddr *)(dst0 + 1); 1901 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1902 KFREE(newsp); 1903 return key_senderror(so, m, EINVAL); 1904 } 1905 } 1906 #endif 1907 1908 newsp->created = time_second; 1909 newsp->lastused = newsp->created; 1910 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1911 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1912 1913 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1914 newsp->state = IPSEC_SPSTATE_ALIVE; 1915 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1916 1917 /* delete the entry in spacqtree */ 1918 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1919 struct secspacq *spacq; 1920 if ((spacq = key_getspacq(&spidx)) != NULL) { 1921 /* reset counter in order to deletion by timehandler. */ 1922 spacq->created = time_second; 1923 spacq->count = 0; 1924 } 1925 } 1926 1927 #if defined(__NetBSD__) 1928 /* Invalidate all cached SPD pointers in the PCBs. */ 1929 ipsec_invalpcbcacheall(); 1930 1931 #if defined(GATEWAY) 1932 /* Invalidate the ipflow cache, as well. */ 1933 ipflow_invalidate_all(); 1934 #ifdef INET6 1935 ip6flow_invalidate_all(); 1936 #endif /* INET6 */ 1937 #endif /* GATEWAY */ 1938 #endif /* __NetBSD__ */ 1939 1940 { 1941 struct mbuf *n, *mpolicy; 1942 struct sadb_msg *newmsg; 1943 int off; 1944 1945 /* create new sadb_msg to reply. */ 1946 if (lft) { 1947 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1948 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1949 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1950 } else { 1951 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1952 SADB_X_EXT_POLICY, 1953 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1954 } 1955 if (!n) 1956 return key_senderror(so, m, ENOBUFS); 1957 1958 if (n->m_len < sizeof(*newmsg)) { 1959 n = m_pullup(n, sizeof(*newmsg)); 1960 if (!n) 1961 return key_senderror(so, m, ENOBUFS); 1962 } 1963 newmsg = mtod(n, struct sadb_msg *); 1964 newmsg->sadb_msg_errno = 0; 1965 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1966 1967 off = 0; 1968 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1969 sizeof(*xpl), &off); 1970 if (mpolicy == NULL) { 1971 /* n is already freed */ 1972 return key_senderror(so, m, ENOBUFS); 1973 } 1974 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 1975 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1976 m_freem(n); 1977 return key_senderror(so, m, EINVAL); 1978 } 1979 xpl->sadb_x_policy_id = newsp->id; 1980 1981 m_freem(m); 1982 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1983 } 1984 } 1985 1986 /* 1987 * get new policy id. 1988 * OUT: 1989 * 0: failure. 1990 * others: success. 1991 */ 1992 static u_int32_t 1993 key_getnewspid() 1994 { 1995 u_int32_t newid = 0; 1996 int count = key_spi_trycnt; /* XXX */ 1997 struct secpolicy *sp; 1998 1999 /* when requesting to allocate spi ranged */ 2000 while (count--) { 2001 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2002 2003 if ((sp = key_getspbyid(newid)) == NULL) 2004 break; 2005 2006 KEY_FREESP(&sp); 2007 } 2008 2009 if (count == 0 || newid == 0) { 2010 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2011 return 0; 2012 } 2013 2014 return newid; 2015 } 2016 2017 /* 2018 * SADB_SPDDELETE processing 2019 * receive 2020 * <base, address(SD), policy(*)> 2021 * from the user(?), and set SADB_SASTATE_DEAD, 2022 * and send, 2023 * <base, address(SD), policy(*)> 2024 * to the ikmpd. 2025 * policy(*) including direction of policy. 2026 * 2027 * m will always be freed. 2028 */ 2029 static int 2030 key_spddelete(so, m, mhp) 2031 struct socket *so; 2032 struct mbuf *m; 2033 const struct sadb_msghdr *mhp; 2034 { 2035 struct sadb_address *src0, *dst0; 2036 struct sadb_x_policy *xpl0; 2037 struct secpolicyindex spidx; 2038 struct secpolicy *sp; 2039 2040 /* sanity check */ 2041 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2042 panic("key_spddelete: NULL pointer is passed"); 2043 2044 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2045 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2046 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2047 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2048 return key_senderror(so, m, EINVAL); 2049 } 2050 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2051 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2052 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2053 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2054 return key_senderror(so, m, EINVAL); 2055 } 2056 2057 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2058 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2059 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2060 2061 /* make secindex */ 2062 /* XXX boundary check against sa_len */ 2063 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2064 src0 + 1, 2065 dst0 + 1, 2066 src0->sadb_address_prefixlen, 2067 dst0->sadb_address_prefixlen, 2068 src0->sadb_address_proto, 2069 &spidx); 2070 2071 /* checking the direciton. */ 2072 switch (xpl0->sadb_x_policy_dir) { 2073 case IPSEC_DIR_INBOUND: 2074 case IPSEC_DIR_OUTBOUND: 2075 break; 2076 default: 2077 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2078 return key_senderror(so, m, EINVAL); 2079 } 2080 2081 /* Is there SP in SPD ? */ 2082 if ((sp = key_getsp(&spidx)) == NULL) { 2083 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2084 return key_senderror(so, m, EINVAL); 2085 } 2086 2087 /* save policy id to buffer to be returned. */ 2088 xpl0->sadb_x_policy_id = sp->id; 2089 2090 key_sp_dead(sp); 2091 key_sp_unlink(sp); /* XXX jrs ordering */ 2092 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2093 2094 #if defined(__NetBSD__) 2095 /* Invalidate all cached SPD pointers in the PCBs. */ 2096 ipsec_invalpcbcacheall(); 2097 2098 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2099 #endif /* __NetBSD__ */ 2100 2101 { 2102 struct mbuf *n; 2103 struct sadb_msg *newmsg; 2104 2105 /* create new sadb_msg to reply. */ 2106 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2107 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2108 if (!n) 2109 return key_senderror(so, m, ENOBUFS); 2110 2111 newmsg = mtod(n, struct sadb_msg *); 2112 newmsg->sadb_msg_errno = 0; 2113 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2114 2115 m_freem(m); 2116 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2117 } 2118 } 2119 2120 /* 2121 * SADB_SPDDELETE2 processing 2122 * receive 2123 * <base, policy(*)> 2124 * from the user(?), and set SADB_SASTATE_DEAD, 2125 * and send, 2126 * <base, policy(*)> 2127 * to the ikmpd. 2128 * policy(*) including direction of policy. 2129 * 2130 * m will always be freed. 2131 */ 2132 static int 2133 key_spddelete2(so, m, mhp) 2134 struct socket *so; 2135 struct mbuf *m; 2136 const struct sadb_msghdr *mhp; 2137 { 2138 u_int32_t id; 2139 struct secpolicy *sp; 2140 2141 /* sanity check */ 2142 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2143 panic("key_spddelete2: NULL pointer is passed"); 2144 2145 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2146 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2147 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2148 key_senderror(so, m, EINVAL); 2149 return 0; 2150 } 2151 2152 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2153 2154 /* Is there SP in SPD ? */ 2155 if ((sp = key_getspbyid(id)) == NULL) { 2156 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2157 key_senderror(so, m, EINVAL); 2158 } 2159 2160 key_sp_dead(sp); 2161 key_sp_unlink(sp); /* XXX jrs ordering */ 2162 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2163 sp = NULL; 2164 2165 #if defined(__NetBSD__) 2166 /* Invalidate all cached SPD pointers in the PCBs. */ 2167 ipsec_invalpcbcacheall(); 2168 2169 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2170 #endif /* __NetBSD__ */ 2171 2172 { 2173 struct mbuf *n, *nn; 2174 struct sadb_msg *newmsg; 2175 int off, len; 2176 2177 /* create new sadb_msg to reply. */ 2178 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2179 2180 if (len > MCLBYTES) 2181 return key_senderror(so, m, ENOBUFS); 2182 MGETHDR(n, M_DONTWAIT, MT_DATA); 2183 if (n && len > MHLEN) { 2184 MCLGET(n, M_DONTWAIT); 2185 if ((n->m_flags & M_EXT) == 0) { 2186 m_freem(n); 2187 n = NULL; 2188 } 2189 } 2190 if (!n) 2191 return key_senderror(so, m, ENOBUFS); 2192 2193 n->m_len = len; 2194 n->m_next = NULL; 2195 off = 0; 2196 2197 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2198 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2199 2200 #ifdef DIAGNOSTIC 2201 if (off != len) 2202 panic("length inconsistency in key_spddelete2"); 2203 #endif 2204 2205 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2206 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2207 if (!n->m_next) { 2208 m_freem(n); 2209 return key_senderror(so, m, ENOBUFS); 2210 } 2211 2212 n->m_pkthdr.len = 0; 2213 for (nn = n; nn; nn = nn->m_next) 2214 n->m_pkthdr.len += nn->m_len; 2215 2216 newmsg = mtod(n, struct sadb_msg *); 2217 newmsg->sadb_msg_errno = 0; 2218 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2219 2220 m_freem(m); 2221 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2222 } 2223 } 2224 2225 /* 2226 * SADB_X_GET processing 2227 * receive 2228 * <base, policy(*)> 2229 * from the user(?), 2230 * and send, 2231 * <base, address(SD), policy> 2232 * to the ikmpd. 2233 * policy(*) including direction of policy. 2234 * 2235 * m will always be freed. 2236 */ 2237 static int 2238 key_spdget(so, m, mhp) 2239 struct socket *so; 2240 struct mbuf *m; 2241 const struct sadb_msghdr *mhp; 2242 { 2243 u_int32_t id; 2244 struct secpolicy *sp; 2245 struct mbuf *n; 2246 2247 /* sanity check */ 2248 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2249 panic("key_spdget: NULL pointer is passed"); 2250 2251 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2252 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2253 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2254 return key_senderror(so, m, EINVAL); 2255 } 2256 2257 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2258 2259 /* Is there SP in SPD ? */ 2260 if ((sp = key_getspbyid(id)) == NULL) { 2261 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2262 return key_senderror(so, m, ENOENT); 2263 } 2264 2265 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2266 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2267 if (n != NULL) { 2268 m_freem(m); 2269 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2270 } else 2271 return key_senderror(so, m, ENOBUFS); 2272 } 2273 2274 /* 2275 * SADB_X_SPDACQUIRE processing. 2276 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2277 * send 2278 * <base, policy(*)> 2279 * to KMD, and expect to receive 2280 * <base> with SADB_X_SPDACQUIRE if error occurred, 2281 * or 2282 * <base, policy> 2283 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2284 * policy(*) is without policy requests. 2285 * 2286 * 0 : succeed 2287 * others: error number 2288 */ 2289 int 2290 key_spdacquire(sp) 2291 struct secpolicy *sp; 2292 { 2293 struct mbuf *result = NULL, *m; 2294 struct secspacq *newspacq; 2295 int error; 2296 2297 /* sanity check */ 2298 if (sp == NULL) 2299 panic("key_spdacquire: NULL pointer is passed"); 2300 if (sp->req != NULL) 2301 panic("key_spdacquire: called but there is request"); 2302 if (sp->policy != IPSEC_POLICY_IPSEC) 2303 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2304 2305 /* Get an entry to check whether sent message or not. */ 2306 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2307 if (key_blockacq_count < newspacq->count) { 2308 /* reset counter and do send message. */ 2309 newspacq->count = 0; 2310 } else { 2311 /* increment counter and do nothing. */ 2312 newspacq->count++; 2313 return 0; 2314 } 2315 } else { 2316 /* make new entry for blocking to send SADB_ACQUIRE. */ 2317 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2318 return ENOBUFS; 2319 2320 /* add to acqtree */ 2321 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2322 } 2323 2324 /* create new sadb_msg to reply. */ 2325 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2326 if (!m) { 2327 error = ENOBUFS; 2328 goto fail; 2329 } 2330 result = m; 2331 2332 result->m_pkthdr.len = 0; 2333 for (m = result; m; m = m->m_next) 2334 result->m_pkthdr.len += m->m_len; 2335 2336 mtod(result, struct sadb_msg *)->sadb_msg_len = 2337 PFKEY_UNIT64(result->m_pkthdr.len); 2338 2339 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2340 2341 fail: 2342 if (result) 2343 m_freem(result); 2344 return error; 2345 } 2346 2347 /* 2348 * SADB_SPDFLUSH processing 2349 * receive 2350 * <base> 2351 * from the user, and free all entries in secpctree. 2352 * and send, 2353 * <base> 2354 * to the user. 2355 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2356 * 2357 * m will always be freed. 2358 */ 2359 static int 2360 key_spdflush(so, m, mhp) 2361 struct socket *so; 2362 struct mbuf *m; 2363 const struct sadb_msghdr *mhp; 2364 { 2365 struct sadb_msg *newmsg; 2366 struct secpolicy *sp; 2367 u_int dir; 2368 2369 /* sanity check */ 2370 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2371 panic("key_spdflush: NULL pointer is passed"); 2372 2373 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2374 return key_senderror(so, m, EINVAL); 2375 2376 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2377 struct secpolicy * nextsp; 2378 for (sp = LIST_FIRST(&sptree[dir]); 2379 sp != NULL; 2380 sp = nextsp) { 2381 2382 nextsp = LIST_NEXT(sp, chain); 2383 if (sp->state == IPSEC_SPSTATE_DEAD) 2384 continue; 2385 key_sp_dead(sp); 2386 key_sp_unlink(sp); 2387 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2388 continue; 2389 } 2390 } 2391 2392 #if defined(__NetBSD__) 2393 /* Invalidate all cached SPD pointers in the PCBs. */ 2394 ipsec_invalpcbcacheall(); 2395 2396 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2397 #endif /* __NetBSD__ */ 2398 2399 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2400 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2401 return key_senderror(so, m, ENOBUFS); 2402 } 2403 2404 if (m->m_next) 2405 m_freem(m->m_next); 2406 m->m_next = NULL; 2407 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2408 newmsg = mtod(m, struct sadb_msg *); 2409 newmsg->sadb_msg_errno = 0; 2410 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2411 2412 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2413 } 2414 2415 static struct sockaddr key_src = { 2416 .sa_len = 2, 2417 .sa_family = PF_KEY, 2418 }; 2419 2420 static struct mbuf * 2421 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2422 { 2423 struct secpolicy *sp; 2424 int cnt; 2425 u_int dir; 2426 struct mbuf *m, *n, *prev; 2427 int totlen; 2428 2429 *lenp = 0; 2430 2431 /* search SPD entry and get buffer size. */ 2432 cnt = 0; 2433 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2434 LIST_FOREACH(sp, &sptree[dir], chain) { 2435 cnt++; 2436 } 2437 } 2438 2439 if (cnt == 0) { 2440 *errorp = ENOENT; 2441 return (NULL); 2442 } 2443 2444 m = NULL; 2445 prev = m; 2446 totlen = 0; 2447 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2448 LIST_FOREACH(sp, &sptree[dir], chain) { 2449 --cnt; 2450 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2451 2452 if (!n) { 2453 *errorp = ENOBUFS; 2454 if (m) m_freem(m); 2455 return (NULL); 2456 } 2457 2458 totlen += n->m_pkthdr.len; 2459 if (!m) { 2460 m = n; 2461 } else { 2462 prev->m_nextpkt = n; 2463 } 2464 prev = n; 2465 } 2466 } 2467 2468 *lenp = totlen; 2469 *errorp = 0; 2470 return (m); 2471 } 2472 2473 /* 2474 * SADB_SPDDUMP processing 2475 * receive 2476 * <base> 2477 * from the user, and dump all SP leaves 2478 * and send, 2479 * <base> ..... 2480 * to the ikmpd. 2481 * 2482 * m will always be freed. 2483 */ 2484 static int 2485 key_spddump(so, m0, mhp) 2486 struct socket *so; 2487 struct mbuf *m0; 2488 const struct sadb_msghdr *mhp; 2489 { 2490 struct mbuf *n; 2491 int error, len; 2492 int ok, s; 2493 pid_t pid; 2494 2495 /* sanity check */ 2496 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2497 panic("key_spddump: NULL pointer is passed"); 2498 2499 2500 pid = mhp->msg->sadb_msg_pid; 2501 /* 2502 * If the requestor has insufficient socket-buffer space 2503 * for the entire chain, nobody gets any response to the DUMP. 2504 * XXX For now, only the requestor ever gets anything. 2505 * Moreover, if the requestor has any space at all, they receive 2506 * the entire chain, otherwise the request is refused with ENOBUFS. 2507 */ 2508 if (sbspace(&so->so_rcv) <= 0) { 2509 return key_senderror(so, m0, ENOBUFS); 2510 } 2511 2512 s = splsoftnet(); 2513 n = key_setspddump_chain(&error, &len, pid); 2514 splx(s); 2515 2516 if (n == NULL) { 2517 return key_senderror(so, m0, ENOENT); 2518 } 2519 pfkeystat.in_total++; 2520 pfkeystat.in_bytes += len; 2521 2522 /* 2523 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2524 * The requestor receives either the entire chain, or an 2525 * error message with ENOBUFS. 2526 */ 2527 2528 /* 2529 * sbappendchainwith record takes the chain of entries, one 2530 * packet-record per SPD entry, prepends the key_src sockaddr 2531 * to each packet-record, links the sockaddr mbufs into a new 2532 * list of records, then appends the entire resulting 2533 * list to the requesting socket. 2534 */ 2535 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2536 n, SB_PRIO_ONESHOT_OVERFLOW); 2537 2538 if (!ok) { 2539 pfkeystat.in_nomem++; 2540 m_freem(n); 2541 return key_senderror(so, m0, ENOBUFS); 2542 } 2543 2544 m_freem(m0); 2545 return error; 2546 } 2547 2548 static struct mbuf * 2549 key_setdumpsp(sp, type, seq, pid) 2550 struct secpolicy *sp; 2551 u_int8_t type; 2552 u_int32_t seq; 2553 pid_t pid; 2554 { 2555 struct mbuf *result = NULL, *m; 2556 2557 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2558 if (!m) 2559 goto fail; 2560 result = m; 2561 2562 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2563 &sp->spidx.src.sa, sp->spidx.prefs, 2564 sp->spidx.ul_proto); 2565 if (!m) 2566 goto fail; 2567 m_cat(result, m); 2568 2569 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2570 &sp->spidx.dst.sa, sp->spidx.prefd, 2571 sp->spidx.ul_proto); 2572 if (!m) 2573 goto fail; 2574 m_cat(result, m); 2575 2576 m = key_sp2msg(sp); 2577 if (!m) 2578 goto fail; 2579 m_cat(result, m); 2580 2581 if ((result->m_flags & M_PKTHDR) == 0) 2582 goto fail; 2583 2584 if (result->m_len < sizeof(struct sadb_msg)) { 2585 result = m_pullup(result, sizeof(struct sadb_msg)); 2586 if (result == NULL) 2587 goto fail; 2588 } 2589 2590 result->m_pkthdr.len = 0; 2591 for (m = result; m; m = m->m_next) 2592 result->m_pkthdr.len += m->m_len; 2593 2594 mtod(result, struct sadb_msg *)->sadb_msg_len = 2595 PFKEY_UNIT64(result->m_pkthdr.len); 2596 2597 return result; 2598 2599 fail: 2600 m_freem(result); 2601 return NULL; 2602 } 2603 2604 /* 2605 * get PFKEY message length for security policy and request. 2606 */ 2607 static u_int 2608 key_getspreqmsglen(sp) 2609 struct secpolicy *sp; 2610 { 2611 u_int tlen; 2612 2613 tlen = sizeof(struct sadb_x_policy); 2614 2615 /* if is the policy for ipsec ? */ 2616 if (sp->policy != IPSEC_POLICY_IPSEC) 2617 return tlen; 2618 2619 /* get length of ipsec requests */ 2620 { 2621 struct ipsecrequest *isr; 2622 int len; 2623 2624 for (isr = sp->req; isr != NULL; isr = isr->next) { 2625 len = sizeof(struct sadb_x_ipsecrequest) 2626 + isr->saidx.src.sa.sa_len 2627 + isr->saidx.dst.sa.sa_len; 2628 2629 tlen += PFKEY_ALIGN8(len); 2630 } 2631 } 2632 2633 return tlen; 2634 } 2635 2636 /* 2637 * SADB_SPDEXPIRE processing 2638 * send 2639 * <base, address(SD), lifetime(CH), policy> 2640 * to KMD by PF_KEY. 2641 * 2642 * OUT: 0 : succeed 2643 * others : error number 2644 */ 2645 static int 2646 key_spdexpire(sp) 2647 struct secpolicy *sp; 2648 { 2649 int s; 2650 struct mbuf *result = NULL, *m; 2651 int len; 2652 int error = -1; 2653 struct sadb_lifetime *lt; 2654 2655 /* XXX: Why do we lock ? */ 2656 s = splsoftnet(); /*called from softclock()*/ 2657 2658 /* sanity check */ 2659 if (sp == NULL) 2660 panic("key_spdexpire: NULL pointer is passed"); 2661 2662 /* set msg header */ 2663 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2664 if (!m) { 2665 error = ENOBUFS; 2666 goto fail; 2667 } 2668 result = m; 2669 2670 /* create lifetime extension (current and hard) */ 2671 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2672 m = key_alloc_mbuf(len); 2673 if (!m || m->m_next) { /*XXX*/ 2674 if (m) 2675 m_freem(m); 2676 error = ENOBUFS; 2677 goto fail; 2678 } 2679 bzero(mtod(m, void *), len); 2680 lt = mtod(m, struct sadb_lifetime *); 2681 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2682 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2683 lt->sadb_lifetime_allocations = 0; 2684 lt->sadb_lifetime_bytes = 0; 2685 lt->sadb_lifetime_addtime = sp->created; 2686 lt->sadb_lifetime_usetime = sp->lastused; 2687 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2688 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2689 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2690 lt->sadb_lifetime_allocations = 0; 2691 lt->sadb_lifetime_bytes = 0; 2692 lt->sadb_lifetime_addtime = sp->lifetime; 2693 lt->sadb_lifetime_usetime = sp->validtime; 2694 m_cat(result, m); 2695 2696 /* set sadb_address for source */ 2697 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2698 &sp->spidx.src.sa, 2699 sp->spidx.prefs, sp->spidx.ul_proto); 2700 if (!m) { 2701 error = ENOBUFS; 2702 goto fail; 2703 } 2704 m_cat(result, m); 2705 2706 /* set sadb_address for destination */ 2707 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2708 &sp->spidx.dst.sa, 2709 sp->spidx.prefd, sp->spidx.ul_proto); 2710 if (!m) { 2711 error = ENOBUFS; 2712 goto fail; 2713 } 2714 m_cat(result, m); 2715 2716 /* set secpolicy */ 2717 m = key_sp2msg(sp); 2718 if (!m) { 2719 error = ENOBUFS; 2720 goto fail; 2721 } 2722 m_cat(result, m); 2723 2724 if ((result->m_flags & M_PKTHDR) == 0) { 2725 error = EINVAL; 2726 goto fail; 2727 } 2728 2729 if (result->m_len < sizeof(struct sadb_msg)) { 2730 result = m_pullup(result, sizeof(struct sadb_msg)); 2731 if (result == NULL) { 2732 error = ENOBUFS; 2733 goto fail; 2734 } 2735 } 2736 2737 result->m_pkthdr.len = 0; 2738 for (m = result; m; m = m->m_next) 2739 result->m_pkthdr.len += m->m_len; 2740 2741 mtod(result, struct sadb_msg *)->sadb_msg_len = 2742 PFKEY_UNIT64(result->m_pkthdr.len); 2743 2744 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2745 2746 fail: 2747 if (result) 2748 m_freem(result); 2749 splx(s); 2750 return error; 2751 } 2752 2753 /* %%% SAD management */ 2754 /* 2755 * allocating a memory for new SA head, and copy from the values of mhp. 2756 * OUT: NULL : failure due to the lack of memory. 2757 * others : pointer to new SA head. 2758 */ 2759 static struct secashead * 2760 key_newsah(saidx) 2761 struct secasindex *saidx; 2762 { 2763 struct secashead *newsah; 2764 2765 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2766 2767 newsah = (struct secashead *) 2768 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2769 if (newsah != NULL) { 2770 int i; 2771 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2772 LIST_INIT(&newsah->savtree[i]); 2773 newsah->saidx = *saidx; 2774 2775 /* add to saidxtree */ 2776 newsah->state = SADB_SASTATE_MATURE; 2777 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2778 } 2779 return(newsah); 2780 } 2781 2782 /* 2783 * delete SA index and all SA registerd. 2784 */ 2785 static void 2786 key_delsah(sah) 2787 struct secashead *sah; 2788 { 2789 struct secasvar *sav, *nextsav; 2790 u_int stateidx, state; 2791 int s; 2792 int zombie = 0; 2793 2794 /* sanity check */ 2795 if (sah == NULL) 2796 panic("key_delsah: NULL pointer is passed"); 2797 2798 s = splsoftnet(); /*called from softclock()*/ 2799 2800 /* searching all SA registerd in the secindex. */ 2801 for (stateidx = 0; 2802 stateidx < _ARRAYLEN(saorder_state_any); 2803 stateidx++) { 2804 2805 state = saorder_state_any[stateidx]; 2806 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2807 sav != NULL; 2808 sav = nextsav) { 2809 2810 nextsav = LIST_NEXT(sav, chain); 2811 2812 if (sav->refcnt == 0) { 2813 /* sanity check */ 2814 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2815 KEY_FREESAV(&sav); 2816 } else { 2817 /* give up to delete this sa */ 2818 zombie++; 2819 } 2820 } 2821 } 2822 2823 /* don't delete sah only if there are savs. */ 2824 if (zombie) { 2825 splx(s); 2826 return; 2827 } 2828 2829 rtcache_free(&sah->sa_route); 2830 2831 /* remove from tree of SA index */ 2832 if (__LIST_CHAINED(sah)) 2833 LIST_REMOVE(sah, chain); 2834 2835 KFREE(sah); 2836 2837 splx(s); 2838 return; 2839 } 2840 2841 /* 2842 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2843 * and copy the values of mhp into new buffer. 2844 * When SAD message type is GETSPI: 2845 * to set sequence number from acq_seq++, 2846 * to set zero to SPI. 2847 * not to call key_setsava(). 2848 * OUT: NULL : fail 2849 * others : pointer to new secasvar. 2850 * 2851 * does not modify mbuf. does not free mbuf on error. 2852 */ 2853 static struct secasvar * 2854 key_newsav(m, mhp, sah, errp, where, tag) 2855 struct mbuf *m; 2856 const struct sadb_msghdr *mhp; 2857 struct secashead *sah; 2858 int *errp; 2859 const char* where; 2860 int tag; 2861 { 2862 struct secasvar *newsav; 2863 const struct sadb_sa *xsa; 2864 2865 /* sanity check */ 2866 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2867 panic("key_newsa: NULL pointer is passed"); 2868 2869 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2870 if (newsav == NULL) { 2871 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2872 *errp = ENOBUFS; 2873 goto done; 2874 } 2875 bzero(newsav, sizeof(struct secasvar)); 2876 2877 switch (mhp->msg->sadb_msg_type) { 2878 case SADB_GETSPI: 2879 newsav->spi = 0; 2880 2881 #ifdef IPSEC_DOSEQCHECK 2882 /* sync sequence number */ 2883 if (mhp->msg->sadb_msg_seq == 0) 2884 newsav->seq = 2885 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2886 else 2887 #endif 2888 newsav->seq = mhp->msg->sadb_msg_seq; 2889 break; 2890 2891 case SADB_ADD: 2892 /* sanity check */ 2893 if (mhp->ext[SADB_EXT_SA] == NULL) { 2894 KFREE(newsav), newsav = NULL; 2895 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2896 *errp = EINVAL; 2897 goto done; 2898 } 2899 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2900 newsav->spi = xsa->sadb_sa_spi; 2901 newsav->seq = mhp->msg->sadb_msg_seq; 2902 break; 2903 default: 2904 KFREE(newsav), newsav = NULL; 2905 *errp = EINVAL; 2906 goto done; 2907 } 2908 2909 /* copy sav values */ 2910 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2911 *errp = key_setsaval(newsav, m, mhp); 2912 if (*errp) { 2913 KFREE(newsav), newsav = NULL; 2914 goto done; 2915 } 2916 } 2917 2918 /* reset created */ 2919 newsav->created = time_second; 2920 newsav->pid = mhp->msg->sadb_msg_pid; 2921 2922 /* add to satree */ 2923 newsav->sah = sah; 2924 newsav->refcnt = 1; 2925 newsav->state = SADB_SASTATE_LARVAL; 2926 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2927 secasvar, chain); 2928 done: 2929 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2930 printf("DP key_newsav from %s:%u return SP:%p\n", 2931 where, tag, newsav)); 2932 2933 return newsav; 2934 } 2935 2936 /* 2937 * free() SA variable entry. 2938 */ 2939 static void 2940 key_delsav(sav) 2941 struct secasvar *sav; 2942 { 2943 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 2944 IPSEC_ASSERT(sav->refcnt == 0, 2945 ("key_delsav: reference count %u > 0", sav->refcnt)); 2946 2947 /* remove from SA header */ 2948 if (__LIST_CHAINED(sav)) 2949 LIST_REMOVE(sav, chain); 2950 2951 /* 2952 * Cleanup xform state. Note that zeroize'ing causes the 2953 * keys to be cleared; otherwise we must do it ourself. 2954 */ 2955 if (sav->tdb_xform != NULL) { 2956 sav->tdb_xform->xf_zeroize(sav); 2957 sav->tdb_xform = NULL; 2958 } else { 2959 if (sav->key_auth != NULL) 2960 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 2961 if (sav->key_enc != NULL) 2962 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 2963 } 2964 if (sav->key_auth != NULL) { 2965 KFREE(sav->key_auth); 2966 sav->key_auth = NULL; 2967 } 2968 if (sav->key_enc != NULL) { 2969 KFREE(sav->key_enc); 2970 sav->key_enc = NULL; 2971 } 2972 if (sav->sched) { 2973 bzero(sav->sched, sav->schedlen); 2974 KFREE(sav->sched); 2975 sav->sched = NULL; 2976 } 2977 if (sav->replay != NULL) { 2978 KFREE(sav->replay); 2979 sav->replay = NULL; 2980 } 2981 if (sav->lft_c != NULL) { 2982 KFREE(sav->lft_c); 2983 sav->lft_c = NULL; 2984 } 2985 if (sav->lft_h != NULL) { 2986 KFREE(sav->lft_h); 2987 sav->lft_h = NULL; 2988 } 2989 if (sav->lft_s != NULL) { 2990 KFREE(sav->lft_s); 2991 sav->lft_s = NULL; 2992 } 2993 if (sav->iv != NULL) { 2994 KFREE(sav->iv); 2995 sav->iv = NULL; 2996 } 2997 2998 KFREE(sav); 2999 3000 return; 3001 } 3002 3003 /* 3004 * search SAD. 3005 * OUT: 3006 * NULL : not found 3007 * others : found, pointer to a SA. 3008 */ 3009 static struct secashead * 3010 key_getsah(saidx) 3011 struct secasindex *saidx; 3012 { 3013 struct secashead *sah; 3014 3015 LIST_FOREACH(sah, &sahtree, chain) { 3016 if (sah->state == SADB_SASTATE_DEAD) 3017 continue; 3018 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3019 return sah; 3020 } 3021 3022 return NULL; 3023 } 3024 3025 /* 3026 * check not to be duplicated SPI. 3027 * NOTE: this function is too slow due to searching all SAD. 3028 * OUT: 3029 * NULL : not found 3030 * others : found, pointer to a SA. 3031 */ 3032 static struct secasvar * 3033 key_checkspidup(saidx, spi) 3034 struct secasindex *saidx; 3035 u_int32_t spi; 3036 { 3037 struct secashead *sah; 3038 struct secasvar *sav; 3039 3040 /* check address family */ 3041 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3042 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3043 return NULL; 3044 } 3045 3046 /* check all SAD */ 3047 LIST_FOREACH(sah, &sahtree, chain) { 3048 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3049 continue; 3050 sav = key_getsavbyspi(sah, spi); 3051 if (sav != NULL) 3052 return sav; 3053 } 3054 3055 return NULL; 3056 } 3057 3058 /* 3059 * search SAD litmited alive SA, protocol, SPI. 3060 * OUT: 3061 * NULL : not found 3062 * others : found, pointer to a SA. 3063 */ 3064 static struct secasvar * 3065 key_getsavbyspi(sah, spi) 3066 struct secashead *sah; 3067 u_int32_t spi; 3068 { 3069 struct secasvar *sav; 3070 u_int stateidx, state; 3071 3072 /* search all status */ 3073 for (stateidx = 0; 3074 stateidx < _ARRAYLEN(saorder_state_alive); 3075 stateidx++) { 3076 3077 state = saorder_state_alive[stateidx]; 3078 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3079 3080 /* sanity check */ 3081 if (sav->state != state) { 3082 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3083 "invalid sav->state (queue: %d SA: %d)\n", 3084 state, sav->state)); 3085 continue; 3086 } 3087 3088 if (sav->spi == spi) 3089 return sav; 3090 } 3091 } 3092 3093 return NULL; 3094 } 3095 3096 /* 3097 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3098 * You must update these if need. 3099 * OUT: 0: success. 3100 * !0: failure. 3101 * 3102 * does not modify mbuf. does not free mbuf on error. 3103 */ 3104 static int 3105 key_setsaval(sav, m, mhp) 3106 struct secasvar *sav; 3107 struct mbuf *m; 3108 const struct sadb_msghdr *mhp; 3109 { 3110 int error = 0; 3111 3112 /* sanity check */ 3113 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3114 panic("key_setsaval: NULL pointer is passed"); 3115 3116 /* initialization */ 3117 sav->replay = NULL; 3118 sav->key_auth = NULL; 3119 sav->key_enc = NULL; 3120 sav->sched = NULL; 3121 sav->schedlen = 0; 3122 sav->iv = NULL; 3123 sav->lft_c = NULL; 3124 sav->lft_h = NULL; 3125 sav->lft_s = NULL; 3126 sav->tdb_xform = NULL; /* transform */ 3127 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3128 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3129 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3130 3131 /* SA */ 3132 if (mhp->ext[SADB_EXT_SA] != NULL) { 3133 const struct sadb_sa *sa0; 3134 3135 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3136 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3137 error = EINVAL; 3138 goto fail; 3139 } 3140 3141 sav->alg_auth = sa0->sadb_sa_auth; 3142 sav->alg_enc = sa0->sadb_sa_encrypt; 3143 sav->flags = sa0->sadb_sa_flags; 3144 3145 /* replay window */ 3146 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3147 sav->replay = (struct secreplay *) 3148 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3149 if (sav->replay == NULL) { 3150 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3151 error = ENOBUFS; 3152 goto fail; 3153 } 3154 if (sa0->sadb_sa_replay != 0) 3155 sav->replay->bitmap = (char*)(sav->replay+1); 3156 sav->replay->wsize = sa0->sadb_sa_replay; 3157 } 3158 } 3159 3160 /* Authentication keys */ 3161 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3162 const struct sadb_key *key0; 3163 int len; 3164 3165 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3166 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3167 3168 error = 0; 3169 if (len < sizeof(*key0)) { 3170 error = EINVAL; 3171 goto fail; 3172 } 3173 switch (mhp->msg->sadb_msg_satype) { 3174 case SADB_SATYPE_AH: 3175 case SADB_SATYPE_ESP: 3176 case SADB_X_SATYPE_TCPSIGNATURE: 3177 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3178 sav->alg_auth != SADB_X_AALG_NULL) 3179 error = EINVAL; 3180 break; 3181 case SADB_X_SATYPE_IPCOMP: 3182 default: 3183 error = EINVAL; 3184 break; 3185 } 3186 if (error) { 3187 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3188 goto fail; 3189 } 3190 3191 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3192 if (sav->key_auth == NULL) { 3193 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3194 error = ENOBUFS; 3195 goto fail; 3196 } 3197 } 3198 3199 /* Encryption key */ 3200 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3201 const struct sadb_key *key0; 3202 int len; 3203 3204 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3205 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3206 3207 error = 0; 3208 if (len < sizeof(*key0)) { 3209 error = EINVAL; 3210 goto fail; 3211 } 3212 switch (mhp->msg->sadb_msg_satype) { 3213 case SADB_SATYPE_ESP: 3214 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3215 sav->alg_enc != SADB_EALG_NULL) { 3216 error = EINVAL; 3217 break; 3218 } 3219 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3220 if (sav->key_enc == NULL) { 3221 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3222 error = ENOBUFS; 3223 goto fail; 3224 } 3225 break; 3226 case SADB_X_SATYPE_IPCOMP: 3227 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3228 error = EINVAL; 3229 sav->key_enc = NULL; /*just in case*/ 3230 break; 3231 case SADB_SATYPE_AH: 3232 case SADB_X_SATYPE_TCPSIGNATURE: 3233 default: 3234 error = EINVAL; 3235 break; 3236 } 3237 if (error) { 3238 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3239 goto fail; 3240 } 3241 } 3242 3243 /* set iv */ 3244 sav->ivlen = 0; 3245 3246 switch (mhp->msg->sadb_msg_satype) { 3247 case SADB_SATYPE_AH: 3248 error = xform_init(sav, XF_AH); 3249 break; 3250 case SADB_SATYPE_ESP: 3251 error = xform_init(sav, XF_ESP); 3252 break; 3253 case SADB_X_SATYPE_IPCOMP: 3254 error = xform_init(sav, XF_IPCOMP); 3255 break; 3256 case SADB_X_SATYPE_TCPSIGNATURE: 3257 error = xform_init(sav, XF_TCPSIGNATURE); 3258 break; 3259 } 3260 if (error) { 3261 ipseclog((LOG_DEBUG, 3262 "key_setsaval: unable to initialize SA type %u.\n", 3263 mhp->msg->sadb_msg_satype)); 3264 goto fail; 3265 } 3266 3267 /* reset created */ 3268 sav->created = time_second; 3269 3270 /* make lifetime for CURRENT */ 3271 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3272 sizeof(struct sadb_lifetime)); 3273 if (sav->lft_c == NULL) { 3274 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3275 error = ENOBUFS; 3276 goto fail; 3277 } 3278 3279 sav->lft_c->sadb_lifetime_len = 3280 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3281 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3282 sav->lft_c->sadb_lifetime_allocations = 0; 3283 sav->lft_c->sadb_lifetime_bytes = 0; 3284 sav->lft_c->sadb_lifetime_addtime = time_second; 3285 sav->lft_c->sadb_lifetime_usetime = 0; 3286 3287 /* lifetimes for HARD and SOFT */ 3288 { 3289 const struct sadb_lifetime *lft0; 3290 3291 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3292 if (lft0 != NULL) { 3293 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3294 error = EINVAL; 3295 goto fail; 3296 } 3297 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3298 sizeof(*lft0)); 3299 if (sav->lft_h == NULL) { 3300 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3301 error = ENOBUFS; 3302 goto fail; 3303 } 3304 /* to be initialize ? */ 3305 } 3306 3307 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3308 if (lft0 != NULL) { 3309 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3310 error = EINVAL; 3311 goto fail; 3312 } 3313 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3314 sizeof(*lft0)); 3315 if (sav->lft_s == NULL) { 3316 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3317 error = ENOBUFS; 3318 goto fail; 3319 } 3320 /* to be initialize ? */ 3321 } 3322 } 3323 3324 return 0; 3325 3326 fail: 3327 /* initialization */ 3328 if (sav->replay != NULL) { 3329 KFREE(sav->replay); 3330 sav->replay = NULL; 3331 } 3332 if (sav->key_auth != NULL) { 3333 KFREE(sav->key_auth); 3334 sav->key_auth = NULL; 3335 } 3336 if (sav->key_enc != NULL) { 3337 KFREE(sav->key_enc); 3338 sav->key_enc = NULL; 3339 } 3340 if (sav->sched) { 3341 KFREE(sav->sched); 3342 sav->sched = NULL; 3343 } 3344 if (sav->iv != NULL) { 3345 KFREE(sav->iv); 3346 sav->iv = NULL; 3347 } 3348 if (sav->lft_c != NULL) { 3349 KFREE(sav->lft_c); 3350 sav->lft_c = NULL; 3351 } 3352 if (sav->lft_h != NULL) { 3353 KFREE(sav->lft_h); 3354 sav->lft_h = NULL; 3355 } 3356 if (sav->lft_s != NULL) { 3357 KFREE(sav->lft_s); 3358 sav->lft_s = NULL; 3359 } 3360 3361 return error; 3362 } 3363 3364 /* 3365 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3366 * OUT: 0: valid 3367 * other: errno 3368 */ 3369 static int 3370 key_mature(sav) 3371 struct secasvar *sav; 3372 { 3373 int error; 3374 3375 /* check SPI value */ 3376 switch (sav->sah->saidx.proto) { 3377 case IPPROTO_ESP: 3378 case IPPROTO_AH: 3379 if (ntohl(sav->spi) <= 255) { 3380 ipseclog((LOG_DEBUG, 3381 "key_mature: illegal range of SPI %u.\n", 3382 (u_int32_t)ntohl(sav->spi))); 3383 return EINVAL; 3384 } 3385 break; 3386 } 3387 3388 /* check satype */ 3389 switch (sav->sah->saidx.proto) { 3390 case IPPROTO_ESP: 3391 /* check flags */ 3392 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3393 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3394 ipseclog((LOG_DEBUG, "key_mature: " 3395 "invalid flag (derived) given to old-esp.\n")); 3396 return EINVAL; 3397 } 3398 error = xform_init(sav, XF_ESP); 3399 break; 3400 case IPPROTO_AH: 3401 /* check flags */ 3402 if (sav->flags & SADB_X_EXT_DERIV) { 3403 ipseclog((LOG_DEBUG, "key_mature: " 3404 "invalid flag (derived) given to AH SA.\n")); 3405 return EINVAL; 3406 } 3407 if (sav->alg_enc != SADB_EALG_NONE) { 3408 ipseclog((LOG_DEBUG, "key_mature: " 3409 "protocol and algorithm mismated.\n")); 3410 return(EINVAL); 3411 } 3412 error = xform_init(sav, XF_AH); 3413 break; 3414 case IPPROTO_IPCOMP: 3415 if (sav->alg_auth != SADB_AALG_NONE) { 3416 ipseclog((LOG_DEBUG, "key_mature: " 3417 "protocol and algorithm mismated.\n")); 3418 return(EINVAL); 3419 } 3420 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3421 && ntohl(sav->spi) >= 0x10000) { 3422 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3423 return(EINVAL); 3424 } 3425 error = xform_init(sav, XF_IPCOMP); 3426 break; 3427 case IPPROTO_TCP: 3428 if (sav->alg_enc != SADB_EALG_NONE) { 3429 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3430 "mismated.\n", __func__)); 3431 return(EINVAL); 3432 } 3433 error = xform_init(sav, XF_TCPSIGNATURE); 3434 break; 3435 default: 3436 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3437 error = EPROTONOSUPPORT; 3438 break; 3439 } 3440 if (error == 0) 3441 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3442 return (error); 3443 } 3444 3445 /* 3446 * subroutine for SADB_GET and SADB_DUMP. 3447 */ 3448 static struct mbuf * 3449 key_setdumpsa(sav, type, satype, seq, pid) 3450 struct secasvar *sav; 3451 u_int8_t type, satype; 3452 u_int32_t seq, pid; 3453 { 3454 struct mbuf *result = NULL, *tres = NULL, *m; 3455 int l = 0; 3456 int i; 3457 void *p; 3458 int dumporder[] = { 3459 SADB_EXT_SA, SADB_X_EXT_SA2, 3460 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3461 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3462 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3463 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3464 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3465 }; 3466 3467 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3468 if (m == NULL) 3469 goto fail; 3470 result = m; 3471 3472 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3473 m = NULL; 3474 p = NULL; 3475 switch (dumporder[i]) { 3476 case SADB_EXT_SA: 3477 m = key_setsadbsa(sav); 3478 if (!m) 3479 goto fail; 3480 break; 3481 3482 case SADB_X_EXT_SA2: 3483 m = key_setsadbxsa2(sav->sah->saidx.mode, 3484 sav->replay ? sav->replay->count : 0, 3485 sav->sah->saidx.reqid); 3486 if (!m) 3487 goto fail; 3488 break; 3489 3490 case SADB_EXT_ADDRESS_SRC: 3491 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3492 &sav->sah->saidx.src.sa, 3493 FULLMASK, IPSEC_ULPROTO_ANY); 3494 if (!m) 3495 goto fail; 3496 break; 3497 3498 case SADB_EXT_ADDRESS_DST: 3499 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3500 &sav->sah->saidx.dst.sa, 3501 FULLMASK, IPSEC_ULPROTO_ANY); 3502 if (!m) 3503 goto fail; 3504 break; 3505 3506 case SADB_EXT_KEY_AUTH: 3507 if (!sav->key_auth) 3508 continue; 3509 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3510 p = sav->key_auth; 3511 break; 3512 3513 case SADB_EXT_KEY_ENCRYPT: 3514 if (!sav->key_enc) 3515 continue; 3516 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3517 p = sav->key_enc; 3518 break; 3519 3520 case SADB_EXT_LIFETIME_CURRENT: 3521 if (!sav->lft_c) 3522 continue; 3523 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3524 p = sav->lft_c; 3525 break; 3526 3527 case SADB_EXT_LIFETIME_HARD: 3528 if (!sav->lft_h) 3529 continue; 3530 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3531 p = sav->lft_h; 3532 break; 3533 3534 case SADB_EXT_LIFETIME_SOFT: 3535 if (!sav->lft_s) 3536 continue; 3537 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3538 p = sav->lft_s; 3539 break; 3540 3541 case SADB_EXT_ADDRESS_PROXY: 3542 case SADB_EXT_IDENTITY_SRC: 3543 case SADB_EXT_IDENTITY_DST: 3544 /* XXX: should we brought from SPD ? */ 3545 case SADB_EXT_SENSITIVITY: 3546 default: 3547 continue; 3548 } 3549 3550 if ((!m && !p) || (m && p)) 3551 goto fail; 3552 if (p && tres) { 3553 M_PREPEND(tres, l, M_DONTWAIT); 3554 if (!tres) 3555 goto fail; 3556 bcopy(p, mtod(tres, void *), l); 3557 continue; 3558 } 3559 if (p) { 3560 m = key_alloc_mbuf(l); 3561 if (!m) 3562 goto fail; 3563 m_copyback(m, 0, l, p); 3564 } 3565 3566 if (tres) 3567 m_cat(m, tres); 3568 tres = m; 3569 } 3570 3571 m_cat(result, tres); 3572 3573 if (result->m_len < sizeof(struct sadb_msg)) { 3574 result = m_pullup(result, sizeof(struct sadb_msg)); 3575 if (result == NULL) 3576 goto fail; 3577 } 3578 3579 result->m_pkthdr.len = 0; 3580 for (m = result; m; m = m->m_next) 3581 result->m_pkthdr.len += m->m_len; 3582 3583 mtod(result, struct sadb_msg *)->sadb_msg_len = 3584 PFKEY_UNIT64(result->m_pkthdr.len); 3585 3586 return result; 3587 3588 fail: 3589 m_freem(result); 3590 m_freem(tres); 3591 return NULL; 3592 } 3593 3594 /* 3595 * set data into sadb_msg. 3596 */ 3597 static struct mbuf * 3598 key_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3599 u_int8_t type, satype; 3600 u_int16_t tlen; 3601 u_int32_t seq; 3602 pid_t pid; 3603 u_int16_t reserved; 3604 { 3605 struct mbuf *m; 3606 struct sadb_msg *p; 3607 int len; 3608 3609 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3610 if (len > MCLBYTES) 3611 return NULL; 3612 MGETHDR(m, M_DONTWAIT, MT_DATA); 3613 if (m && len > MHLEN) { 3614 MCLGET(m, M_DONTWAIT); 3615 if ((m->m_flags & M_EXT) == 0) { 3616 m_freem(m); 3617 m = NULL; 3618 } 3619 } 3620 if (!m) 3621 return NULL; 3622 m->m_pkthdr.len = m->m_len = len; 3623 m->m_next = NULL; 3624 3625 p = mtod(m, struct sadb_msg *); 3626 3627 bzero(p, len); 3628 p->sadb_msg_version = PF_KEY_V2; 3629 p->sadb_msg_type = type; 3630 p->sadb_msg_errno = 0; 3631 p->sadb_msg_satype = satype; 3632 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3633 p->sadb_msg_reserved = reserved; 3634 p->sadb_msg_seq = seq; 3635 p->sadb_msg_pid = (u_int32_t)pid; 3636 3637 return m; 3638 } 3639 3640 /* 3641 * copy secasvar data into sadb_address. 3642 */ 3643 static struct mbuf * 3644 key_setsadbsa(sav) 3645 struct secasvar *sav; 3646 { 3647 struct mbuf *m; 3648 struct sadb_sa *p; 3649 int len; 3650 3651 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3652 m = key_alloc_mbuf(len); 3653 if (!m || m->m_next) { /*XXX*/ 3654 if (m) 3655 m_freem(m); 3656 return NULL; 3657 } 3658 3659 p = mtod(m, struct sadb_sa *); 3660 3661 bzero(p, len); 3662 p->sadb_sa_len = PFKEY_UNIT64(len); 3663 p->sadb_sa_exttype = SADB_EXT_SA; 3664 p->sadb_sa_spi = sav->spi; 3665 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3666 p->sadb_sa_state = sav->state; 3667 p->sadb_sa_auth = sav->alg_auth; 3668 p->sadb_sa_encrypt = sav->alg_enc; 3669 p->sadb_sa_flags = sav->flags; 3670 3671 return m; 3672 } 3673 3674 /* 3675 * set data into sadb_address. 3676 */ 3677 static struct mbuf * 3678 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3679 u_int16_t exttype; 3680 const struct sockaddr *saddr; 3681 u_int8_t prefixlen; 3682 u_int16_t ul_proto; 3683 { 3684 struct mbuf *m; 3685 struct sadb_address *p; 3686 size_t len; 3687 3688 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3689 PFKEY_ALIGN8(saddr->sa_len); 3690 m = key_alloc_mbuf(len); 3691 if (!m || m->m_next) { /*XXX*/ 3692 if (m) 3693 m_freem(m); 3694 return NULL; 3695 } 3696 3697 p = mtod(m, struct sadb_address *); 3698 3699 bzero(p, len); 3700 p->sadb_address_len = PFKEY_UNIT64(len); 3701 p->sadb_address_exttype = exttype; 3702 p->sadb_address_proto = ul_proto; 3703 if (prefixlen == FULLMASK) { 3704 switch (saddr->sa_family) { 3705 case AF_INET: 3706 prefixlen = sizeof(struct in_addr) << 3; 3707 break; 3708 case AF_INET6: 3709 prefixlen = sizeof(struct in6_addr) << 3; 3710 break; 3711 default: 3712 ; /*XXX*/ 3713 } 3714 } 3715 p->sadb_address_prefixlen = prefixlen; 3716 p->sadb_address_reserved = 0; 3717 3718 bcopy(saddr, 3719 mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3720 saddr->sa_len); 3721 3722 return m; 3723 } 3724 3725 #if 0 3726 /* 3727 * set data into sadb_ident. 3728 */ 3729 static struct mbuf * 3730 key_setsadbident(exttype, idtype, string, stringlen, id) 3731 u_int16_t exttype, idtype; 3732 void *string; 3733 int stringlen; 3734 u_int64_t id; 3735 { 3736 struct mbuf *m; 3737 struct sadb_ident *p; 3738 size_t len; 3739 3740 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3741 m = key_alloc_mbuf(len); 3742 if (!m || m->m_next) { /*XXX*/ 3743 if (m) 3744 m_freem(m); 3745 return NULL; 3746 } 3747 3748 p = mtod(m, struct sadb_ident *); 3749 3750 bzero(p, len); 3751 p->sadb_ident_len = PFKEY_UNIT64(len); 3752 p->sadb_ident_exttype = exttype; 3753 p->sadb_ident_type = idtype; 3754 p->sadb_ident_reserved = 0; 3755 p->sadb_ident_id = id; 3756 3757 bcopy(string, 3758 mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3759 stringlen); 3760 3761 return m; 3762 } 3763 #endif 3764 3765 /* 3766 * set data into sadb_x_sa2. 3767 */ 3768 static struct mbuf * 3769 key_setsadbxsa2(mode, seq, reqid) 3770 u_int8_t mode; 3771 u_int32_t seq; 3772 u_int16_t reqid; 3773 { 3774 struct mbuf *m; 3775 struct sadb_x_sa2 *p; 3776 size_t len; 3777 3778 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3779 m = key_alloc_mbuf(len); 3780 if (!m || m->m_next) { /*XXX*/ 3781 if (m) 3782 m_freem(m); 3783 return NULL; 3784 } 3785 3786 p = mtod(m, struct sadb_x_sa2 *); 3787 3788 bzero(p, len); 3789 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3790 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3791 p->sadb_x_sa2_mode = mode; 3792 p->sadb_x_sa2_reserved1 = 0; 3793 p->sadb_x_sa2_reserved2 = 0; 3794 p->sadb_x_sa2_sequence = seq; 3795 p->sadb_x_sa2_reqid = reqid; 3796 3797 return m; 3798 } 3799 3800 /* 3801 * set data into sadb_x_policy 3802 */ 3803 static struct mbuf * 3804 key_setsadbxpolicy(type, dir, id) 3805 u_int16_t type; 3806 u_int8_t dir; 3807 u_int32_t id; 3808 { 3809 struct mbuf *m; 3810 struct sadb_x_policy *p; 3811 size_t len; 3812 3813 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3814 m = key_alloc_mbuf(len); 3815 if (!m || m->m_next) { /*XXX*/ 3816 if (m) 3817 m_freem(m); 3818 return NULL; 3819 } 3820 3821 p = mtod(m, struct sadb_x_policy *); 3822 3823 bzero(p, len); 3824 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3825 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3826 p->sadb_x_policy_type = type; 3827 p->sadb_x_policy_dir = dir; 3828 p->sadb_x_policy_id = id; 3829 3830 return m; 3831 } 3832 3833 /* %%% utilities */ 3834 /* 3835 * copy a buffer into the new buffer allocated. 3836 */ 3837 static void * 3838 key_newbuf(src, len) 3839 const void *src; 3840 u_int len; 3841 { 3842 void *new; 3843 3844 KMALLOC(new, void *, len); 3845 if (new == NULL) { 3846 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 3847 return NULL; 3848 } 3849 bcopy(src, new, len); 3850 3851 return new; 3852 } 3853 3854 /* compare my own address 3855 * OUT: 1: true, i.e. my address. 3856 * 0: false 3857 */ 3858 int 3859 key_ismyaddr(sa) 3860 struct sockaddr *sa; 3861 { 3862 #ifdef INET 3863 struct sockaddr_in *sin; 3864 struct in_ifaddr *ia; 3865 #endif 3866 3867 /* sanity check */ 3868 if (sa == NULL) 3869 panic("key_ismyaddr: NULL pointer is passed"); 3870 3871 switch (sa->sa_family) { 3872 #ifdef INET 3873 case AF_INET: 3874 sin = (struct sockaddr_in *)sa; 3875 for (ia = in_ifaddrhead.tqh_first; ia; 3876 ia = ia->ia_link.tqe_next) 3877 { 3878 if (sin->sin_family == ia->ia_addr.sin_family && 3879 sin->sin_len == ia->ia_addr.sin_len && 3880 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3881 { 3882 return 1; 3883 } 3884 } 3885 break; 3886 #endif 3887 #ifdef INET6 3888 case AF_INET6: 3889 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3890 #endif 3891 } 3892 3893 return 0; 3894 } 3895 3896 #ifdef INET6 3897 /* 3898 * compare my own address for IPv6. 3899 * 1: ours 3900 * 0: other 3901 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3902 */ 3903 #include <netinet6/in6_var.h> 3904 3905 static int 3906 key_ismyaddr6(sin6) 3907 struct sockaddr_in6 *sin6; 3908 { 3909 struct in6_ifaddr *ia; 3910 struct in6_multi *in6m; 3911 3912 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 3913 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3914 (struct sockaddr *)&ia->ia_addr, 0) == 0) 3915 return 1; 3916 3917 /* 3918 * XXX Multicast 3919 * XXX why do we care about multlicast here while we don't care 3920 * about IPv4 multicast?? 3921 * XXX scope 3922 */ 3923 in6m = NULL; 3924 #ifdef __FreeBSD__ 3925 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3926 #else 3927 for ((in6m) = ia->ia6_multiaddrs.lh_first; 3928 (in6m) != NULL && 3929 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 3930 (in6m) = in6m->in6m_entry.le_next) 3931 continue; 3932 #endif 3933 if (in6m) 3934 return 1; 3935 } 3936 3937 /* loopback, just for safety */ 3938 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3939 return 1; 3940 3941 return 0; 3942 } 3943 #endif /*INET6*/ 3944 3945 /* 3946 * compare two secasindex structure. 3947 * flag can specify to compare 2 saidxes. 3948 * compare two secasindex structure without both mode and reqid. 3949 * don't compare port. 3950 * IN: 3951 * saidx0: source, it can be in SAD. 3952 * saidx1: object. 3953 * OUT: 3954 * 1 : equal 3955 * 0 : not equal 3956 */ 3957 static int 3958 key_cmpsaidx( 3959 const struct secasindex *saidx0, 3960 const struct secasindex *saidx1, 3961 int flag) 3962 { 3963 /* sanity */ 3964 if (saidx0 == NULL && saidx1 == NULL) 3965 return 1; 3966 3967 if (saidx0 == NULL || saidx1 == NULL) 3968 return 0; 3969 3970 if (saidx0->proto != saidx1->proto) 3971 return 0; 3972 3973 if (flag == CMP_EXACTLY) { 3974 if (saidx0->mode != saidx1->mode) 3975 return 0; 3976 if (saidx0->reqid != saidx1->reqid) 3977 return 0; 3978 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3979 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3980 return 0; 3981 } else { 3982 3983 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3984 if (flag == CMP_MODE_REQID 3985 ||flag == CMP_REQID) { 3986 /* 3987 * If reqid of SPD is non-zero, unique SA is required. 3988 * The result must be of same reqid in this case. 3989 */ 3990 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3991 return 0; 3992 } 3993 3994 if (flag == CMP_MODE_REQID) { 3995 if (saidx0->mode != IPSEC_MODE_ANY 3996 && saidx0->mode != saidx1->mode) 3997 return 0; 3998 } 3999 4000 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 4001 return 0; 4002 } 4003 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 4004 return 0; 4005 } 4006 } 4007 4008 return 1; 4009 } 4010 4011 /* 4012 * compare two secindex structure exactly. 4013 * IN: 4014 * spidx0: source, it is often in SPD. 4015 * spidx1: object, it is often from PFKEY message. 4016 * OUT: 4017 * 1 : equal 4018 * 0 : not equal 4019 */ 4020 int 4021 key_cmpspidx_exactly( 4022 struct secpolicyindex *spidx0, 4023 struct secpolicyindex *spidx1) 4024 { 4025 /* sanity */ 4026 if (spidx0 == NULL && spidx1 == NULL) 4027 return 1; 4028 4029 if (spidx0 == NULL || spidx1 == NULL) 4030 return 0; 4031 4032 if (spidx0->prefs != spidx1->prefs 4033 || spidx0->prefd != spidx1->prefd 4034 || spidx0->ul_proto != spidx1->ul_proto) 4035 return 0; 4036 4037 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4038 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4039 } 4040 4041 /* 4042 * compare two secindex structure with mask. 4043 * IN: 4044 * spidx0: source, it is often in SPD. 4045 * spidx1: object, it is often from IP header. 4046 * OUT: 4047 * 1 : equal 4048 * 0 : not equal 4049 */ 4050 int 4051 key_cmpspidx_withmask( 4052 struct secpolicyindex *spidx0, 4053 struct secpolicyindex *spidx1) 4054 { 4055 /* sanity */ 4056 if (spidx0 == NULL && spidx1 == NULL) 4057 return 1; 4058 4059 if (spidx0 == NULL || spidx1 == NULL) 4060 return 0; 4061 4062 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4063 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4064 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4065 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4066 return 0; 4067 4068 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4069 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4070 && spidx0->ul_proto != spidx1->ul_proto) 4071 return 0; 4072 4073 switch (spidx0->src.sa.sa_family) { 4074 case AF_INET: 4075 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4076 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4077 return 0; 4078 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4079 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4080 return 0; 4081 break; 4082 case AF_INET6: 4083 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4084 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4085 return 0; 4086 /* 4087 * scope_id check. if sin6_scope_id is 0, we regard it 4088 * as a wildcard scope, which matches any scope zone ID. 4089 */ 4090 if (spidx0->src.sin6.sin6_scope_id && 4091 spidx1->src.sin6.sin6_scope_id && 4092 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4093 return 0; 4094 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4095 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4096 return 0; 4097 break; 4098 default: 4099 /* XXX */ 4100 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4101 return 0; 4102 break; 4103 } 4104 4105 switch (spidx0->dst.sa.sa_family) { 4106 case AF_INET: 4107 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4108 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4109 return 0; 4110 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4111 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4112 return 0; 4113 break; 4114 case AF_INET6: 4115 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4116 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4117 return 0; 4118 /* 4119 * scope_id check. if sin6_scope_id is 0, we regard it 4120 * as a wildcard scope, which matches any scope zone ID. 4121 */ 4122 if (spidx0->src.sin6.sin6_scope_id && 4123 spidx1->src.sin6.sin6_scope_id && 4124 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4125 return 0; 4126 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4127 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4128 return 0; 4129 break; 4130 default: 4131 /* XXX */ 4132 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4133 return 0; 4134 break; 4135 } 4136 4137 /* XXX Do we check other field ? e.g. flowinfo */ 4138 4139 return 1; 4140 } 4141 4142 /* returns 0 on match */ 4143 static int 4144 key_sockaddrcmp( 4145 const struct sockaddr *sa1, 4146 const struct sockaddr *sa2, 4147 int port) 4148 { 4149 #ifdef satosin 4150 #undef satosin 4151 #endif 4152 #define satosin(s) ((const struct sockaddr_in *)s) 4153 #ifdef satosin6 4154 #undef satosin6 4155 #endif 4156 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4157 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4158 return 1; 4159 4160 switch (sa1->sa_family) { 4161 case AF_INET: 4162 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4163 return 1; 4164 if (satosin(sa1)->sin_addr.s_addr != 4165 satosin(sa2)->sin_addr.s_addr) { 4166 return 1; 4167 } 4168 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4169 return 1; 4170 break; 4171 case AF_INET6: 4172 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4173 return 1; /*EINVAL*/ 4174 if (satosin6(sa1)->sin6_scope_id != 4175 satosin6(sa2)->sin6_scope_id) { 4176 return 1; 4177 } 4178 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4179 &satosin6(sa2)->sin6_addr)) { 4180 return 1; 4181 } 4182 if (port && 4183 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4184 return 1; 4185 } 4186 break; 4187 default: 4188 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4189 return 1; 4190 break; 4191 } 4192 4193 return 0; 4194 #undef satosin 4195 #undef satosin6 4196 } 4197 4198 /* 4199 * compare two buffers with mask. 4200 * IN: 4201 * addr1: source 4202 * addr2: object 4203 * bits: Number of bits to compare 4204 * OUT: 4205 * 1 : equal 4206 * 0 : not equal 4207 */ 4208 static int 4209 key_bbcmp(const void *a1, const void *a2, u_int bits) 4210 { 4211 const unsigned char *p1 = a1; 4212 const unsigned char *p2 = a2; 4213 4214 /* XXX: This could be considerably faster if we compare a word 4215 * at a time, but it is complicated on LSB Endian machines */ 4216 4217 /* Handle null pointers */ 4218 if (p1 == NULL || p2 == NULL) 4219 return (p1 == p2); 4220 4221 while (bits >= 8) { 4222 if (*p1++ != *p2++) 4223 return 0; 4224 bits -= 8; 4225 } 4226 4227 if (bits > 0) { 4228 u_int8_t mask = ~((1<<(8-bits))-1); 4229 if ((*p1 & mask) != (*p2 & mask)) 4230 return 0; 4231 } 4232 return 1; /* Match! */ 4233 } 4234 4235 /* 4236 * time handler. 4237 * scanning SPD and SAD to check status for each entries, 4238 * and do to remove or to expire. 4239 * XXX: year 2038 problem may remain. 4240 */ 4241 void 4242 key_timehandler(void* arg) 4243 { 4244 u_int dir; 4245 int s; 4246 time_t now = time_second; 4247 4248 s = splsoftnet(); /*called from softclock()*/ 4249 4250 /* SPD */ 4251 { 4252 struct secpolicy *sp, *nextsp; 4253 4254 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4255 for (sp = LIST_FIRST(&sptree[dir]); 4256 sp != NULL; 4257 sp = nextsp) { 4258 4259 nextsp = LIST_NEXT(sp, chain); 4260 4261 if (sp->state == IPSEC_SPSTATE_DEAD) { 4262 key_sp_unlink(sp); /*XXX*/ 4263 4264 /* 'sp' dead; continue transfers to 4265 * 'sp = nextsp' 4266 */ 4267 continue; 4268 } 4269 4270 if (sp->lifetime == 0 && sp->validtime == 0) 4271 continue; 4272 4273 /* the deletion will occur next time */ 4274 if ((sp->lifetime && now - sp->created > sp->lifetime) 4275 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4276 key_sp_dead(sp); 4277 key_spdexpire(sp); 4278 continue; 4279 } 4280 } 4281 } 4282 } 4283 4284 /* SAD */ 4285 { 4286 struct secashead *sah, *nextsah; 4287 struct secasvar *sav, *nextsav; 4288 4289 for (sah = LIST_FIRST(&sahtree); 4290 sah != NULL; 4291 sah = nextsah) { 4292 4293 nextsah = LIST_NEXT(sah, chain); 4294 4295 /* if sah has been dead, then delete it and process next sah. */ 4296 if (sah->state == SADB_SASTATE_DEAD) { 4297 key_delsah(sah); 4298 continue; 4299 } 4300 4301 /* if LARVAL entry doesn't become MATURE, delete it. */ 4302 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4303 sav != NULL; 4304 sav = nextsav) { 4305 4306 nextsav = LIST_NEXT(sav, chain); 4307 4308 if (now - sav->created > key_larval_lifetime) { 4309 KEY_FREESAV(&sav); 4310 } 4311 } 4312 4313 /* 4314 * check MATURE entry to start to send expire message 4315 * whether or not. 4316 */ 4317 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4318 sav != NULL; 4319 sav = nextsav) { 4320 4321 nextsav = LIST_NEXT(sav, chain); 4322 4323 /* we don't need to check. */ 4324 if (sav->lft_s == NULL) 4325 continue; 4326 4327 /* sanity check */ 4328 if (sav->lft_c == NULL) { 4329 ipseclog((LOG_DEBUG,"key_timehandler: " 4330 "There is no CURRENT time, why?\n")); 4331 continue; 4332 } 4333 4334 /* check SOFT lifetime */ 4335 if (sav->lft_s->sadb_lifetime_addtime != 0 4336 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4337 /* 4338 * check SA to be used whether or not. 4339 * when SA hasn't been used, delete it. 4340 */ 4341 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4342 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4343 KEY_FREESAV(&sav); 4344 } else { 4345 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4346 /* 4347 * XXX If we keep to send expire 4348 * message in the status of 4349 * DYING. Do remove below code. 4350 */ 4351 key_expire(sav); 4352 } 4353 } 4354 /* check SOFT lifetime by bytes */ 4355 /* 4356 * XXX I don't know the way to delete this SA 4357 * when new SA is installed. Caution when it's 4358 * installed too big lifetime by time. 4359 */ 4360 else if (sav->lft_s->sadb_lifetime_bytes != 0 4361 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4362 4363 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4364 /* 4365 * XXX If we keep to send expire 4366 * message in the status of 4367 * DYING. Do remove below code. 4368 */ 4369 key_expire(sav); 4370 } 4371 } 4372 4373 /* check DYING entry to change status to DEAD. */ 4374 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4375 sav != NULL; 4376 sav = nextsav) { 4377 4378 nextsav = LIST_NEXT(sav, chain); 4379 4380 /* we don't need to check. */ 4381 if (sav->lft_h == NULL) 4382 continue; 4383 4384 /* sanity check */ 4385 if (sav->lft_c == NULL) { 4386 ipseclog((LOG_DEBUG, "key_timehandler: " 4387 "There is no CURRENT time, why?\n")); 4388 continue; 4389 } 4390 4391 if (sav->lft_h->sadb_lifetime_addtime != 0 4392 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4393 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4394 KEY_FREESAV(&sav); 4395 } 4396 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4397 else if (sav->lft_s != NULL 4398 && sav->lft_s->sadb_lifetime_addtime != 0 4399 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4400 /* 4401 * XXX: should be checked to be 4402 * installed the valid SA. 4403 */ 4404 4405 /* 4406 * If there is no SA then sending 4407 * expire message. 4408 */ 4409 key_expire(sav); 4410 } 4411 #endif 4412 /* check HARD lifetime by bytes */ 4413 else if (sav->lft_h->sadb_lifetime_bytes != 0 4414 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4415 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4416 KEY_FREESAV(&sav); 4417 } 4418 } 4419 4420 /* delete entry in DEAD */ 4421 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4422 sav != NULL; 4423 sav = nextsav) { 4424 4425 nextsav = LIST_NEXT(sav, chain); 4426 4427 /* sanity check */ 4428 if (sav->state != SADB_SASTATE_DEAD) { 4429 ipseclog((LOG_DEBUG, "key_timehandler: " 4430 "invalid sav->state " 4431 "(queue: %d SA: %d): " 4432 "kill it anyway\n", 4433 SADB_SASTATE_DEAD, sav->state)); 4434 } 4435 4436 /* 4437 * do not call key_freesav() here. 4438 * sav should already be freed, and sav->refcnt 4439 * shows other references to sav 4440 * (such as from SPD). 4441 */ 4442 } 4443 } 4444 } 4445 4446 #ifndef IPSEC_NONBLOCK_ACQUIRE 4447 /* ACQ tree */ 4448 { 4449 struct secacq *acq, *nextacq; 4450 4451 for (acq = LIST_FIRST(&acqtree); 4452 acq != NULL; 4453 acq = nextacq) { 4454 4455 nextacq = LIST_NEXT(acq, chain); 4456 4457 if (now - acq->created > key_blockacq_lifetime 4458 && __LIST_CHAINED(acq)) { 4459 LIST_REMOVE(acq, chain); 4460 KFREE(acq); 4461 } 4462 } 4463 } 4464 #endif 4465 4466 /* SP ACQ tree */ 4467 { 4468 struct secspacq *acq, *nextacq; 4469 4470 for (acq = LIST_FIRST(&spacqtree); 4471 acq != NULL; 4472 acq = nextacq) { 4473 4474 nextacq = LIST_NEXT(acq, chain); 4475 4476 if (now - acq->created > key_blockacq_lifetime 4477 && __LIST_CHAINED(acq)) { 4478 LIST_REMOVE(acq, chain); 4479 KFREE(acq); 4480 } 4481 } 4482 } 4483 4484 /* initialize random seed */ 4485 if (key_tick_init_random++ > key_int_random) { 4486 key_tick_init_random = 0; 4487 key_srandom(); 4488 } 4489 4490 #ifndef IPSEC_DEBUG2 4491 /* do exchange to tick time !! */ 4492 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4493 #endif /* IPSEC_DEBUG2 */ 4494 4495 splx(s); 4496 return; 4497 } 4498 4499 #ifdef __NetBSD__ 4500 void srandom(int); 4501 void srandom(int arg) {return;} 4502 #endif 4503 4504 /* 4505 * to initialize a seed for random() 4506 */ 4507 static void 4508 key_srandom() 4509 { 4510 srandom(time_second); 4511 } 4512 4513 u_long 4514 key_random() 4515 { 4516 u_long value; 4517 4518 key_randomfill(&value, sizeof(value)); 4519 return value; 4520 } 4521 4522 void 4523 key_randomfill(p, l) 4524 void *p; 4525 size_t l; 4526 { 4527 size_t n; 4528 u_long v; 4529 static int warn = 1; 4530 4531 n = 0; 4532 n = (size_t)read_random(p, (u_int)l); 4533 /* last resort */ 4534 while (n < l) { 4535 v = random(); 4536 bcopy(&v, (u_int8_t *)p + n, 4537 l - n < sizeof(v) ? l - n : sizeof(v)); 4538 n += sizeof(v); 4539 4540 if (warn) { 4541 printf("WARNING: pseudo-random number generator " 4542 "used for IPsec processing\n"); 4543 warn = 0; 4544 } 4545 } 4546 } 4547 4548 /* 4549 * map SADB_SATYPE_* to IPPROTO_*. 4550 * if satype == SADB_SATYPE then satype is mapped to ~0. 4551 * OUT: 4552 * 0: invalid satype. 4553 */ 4554 static u_int16_t 4555 key_satype2proto(satype) 4556 u_int8_t satype; 4557 { 4558 switch (satype) { 4559 case SADB_SATYPE_UNSPEC: 4560 return IPSEC_PROTO_ANY; 4561 case SADB_SATYPE_AH: 4562 return IPPROTO_AH; 4563 case SADB_SATYPE_ESP: 4564 return IPPROTO_ESP; 4565 case SADB_X_SATYPE_IPCOMP: 4566 return IPPROTO_IPCOMP; 4567 case SADB_X_SATYPE_TCPSIGNATURE: 4568 return IPPROTO_TCP; 4569 default: 4570 return 0; 4571 } 4572 /* NOTREACHED */ 4573 } 4574 4575 /* 4576 * map IPPROTO_* to SADB_SATYPE_* 4577 * OUT: 4578 * 0: invalid protocol type. 4579 */ 4580 static u_int8_t 4581 key_proto2satype(proto) 4582 u_int16_t proto; 4583 { 4584 switch (proto) { 4585 case IPPROTO_AH: 4586 return SADB_SATYPE_AH; 4587 case IPPROTO_ESP: 4588 return SADB_SATYPE_ESP; 4589 case IPPROTO_IPCOMP: 4590 return SADB_X_SATYPE_IPCOMP; 4591 case IPPROTO_TCP: 4592 return SADB_X_SATYPE_TCPSIGNATURE; 4593 default: 4594 return 0; 4595 } 4596 /* NOTREACHED */ 4597 } 4598 4599 /* %%% PF_KEY */ 4600 /* 4601 * SADB_GETSPI processing is to receive 4602 * <base, (SA2), src address, dst address, (SPI range)> 4603 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4604 * tree with the status of LARVAL, and send 4605 * <base, SA(*), address(SD)> 4606 * to the IKMPd. 4607 * 4608 * IN: mhp: pointer to the pointer to each header. 4609 * OUT: NULL if fail. 4610 * other if success, return pointer to the message to send. 4611 */ 4612 static int 4613 key_getspi(so, m, mhp) 4614 struct socket *so; 4615 struct mbuf *m; 4616 const struct sadb_msghdr *mhp; 4617 { 4618 struct sadb_address *src0, *dst0; 4619 struct secasindex saidx; 4620 struct secashead *newsah; 4621 struct secasvar *newsav; 4622 u_int8_t proto; 4623 u_int32_t spi; 4624 u_int8_t mode; 4625 u_int16_t reqid; 4626 int error; 4627 4628 /* sanity check */ 4629 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4630 panic("key_getspi: NULL pointer is passed"); 4631 4632 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4633 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4634 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4635 return key_senderror(so, m, EINVAL); 4636 } 4637 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4638 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4639 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4640 return key_senderror(so, m, EINVAL); 4641 } 4642 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4643 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4644 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4645 } else { 4646 mode = IPSEC_MODE_ANY; 4647 reqid = 0; 4648 } 4649 4650 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4651 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4652 4653 /* map satype to proto */ 4654 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4655 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4656 return key_senderror(so, m, EINVAL); 4657 } 4658 4659 /* make sure if port number is zero. */ 4660 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4661 case AF_INET: 4662 if (((struct sockaddr *)(src0 + 1))->sa_len != 4663 sizeof(struct sockaddr_in)) 4664 return key_senderror(so, m, EINVAL); 4665 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4666 break; 4667 case AF_INET6: 4668 if (((struct sockaddr *)(src0 + 1))->sa_len != 4669 sizeof(struct sockaddr_in6)) 4670 return key_senderror(so, m, EINVAL); 4671 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4672 break; 4673 default: 4674 ; /*???*/ 4675 } 4676 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4677 case AF_INET: 4678 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4679 sizeof(struct sockaddr_in)) 4680 return key_senderror(so, m, EINVAL); 4681 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4682 break; 4683 case AF_INET6: 4684 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4685 sizeof(struct sockaddr_in6)) 4686 return key_senderror(so, m, EINVAL); 4687 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4688 break; 4689 default: 4690 ; /*???*/ 4691 } 4692 4693 /* XXX boundary check against sa_len */ 4694 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4695 4696 /* SPI allocation */ 4697 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4698 &saidx); 4699 if (spi == 0) 4700 return key_senderror(so, m, EINVAL); 4701 4702 /* get a SA index */ 4703 if ((newsah = key_getsah(&saidx)) == NULL) { 4704 /* create a new SA index */ 4705 if ((newsah = key_newsah(&saidx)) == NULL) { 4706 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4707 return key_senderror(so, m, ENOBUFS); 4708 } 4709 } 4710 4711 /* get a new SA */ 4712 /* XXX rewrite */ 4713 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4714 if (newsav == NULL) { 4715 /* XXX don't free new SA index allocated in above. */ 4716 return key_senderror(so, m, error); 4717 } 4718 4719 /* set spi */ 4720 newsav->spi = htonl(spi); 4721 4722 #ifndef IPSEC_NONBLOCK_ACQUIRE 4723 /* delete the entry in acqtree */ 4724 if (mhp->msg->sadb_msg_seq != 0) { 4725 struct secacq *acq; 4726 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4727 /* reset counter in order to deletion by timehandler. */ 4728 acq->created = time_second; 4729 acq->count = 0; 4730 } 4731 } 4732 #endif 4733 4734 { 4735 struct mbuf *n, *nn; 4736 struct sadb_sa *m_sa; 4737 struct sadb_msg *newmsg; 4738 int off, len; 4739 4740 /* create new sadb_msg to reply. */ 4741 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4742 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4743 if (len > MCLBYTES) 4744 return key_senderror(so, m, ENOBUFS); 4745 4746 MGETHDR(n, M_DONTWAIT, MT_DATA); 4747 if (len > MHLEN) { 4748 MCLGET(n, M_DONTWAIT); 4749 if ((n->m_flags & M_EXT) == 0) { 4750 m_freem(n); 4751 n = NULL; 4752 } 4753 } 4754 if (!n) 4755 return key_senderror(so, m, ENOBUFS); 4756 4757 n->m_len = len; 4758 n->m_next = NULL; 4759 off = 0; 4760 4761 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4762 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4763 4764 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4765 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4766 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4767 m_sa->sadb_sa_spi = htonl(spi); 4768 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4769 4770 #ifdef DIAGNOSTIC 4771 if (off != len) 4772 panic("length inconsistency in key_getspi"); 4773 #endif 4774 4775 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4776 SADB_EXT_ADDRESS_DST); 4777 if (!n->m_next) { 4778 m_freem(n); 4779 return key_senderror(so, m, ENOBUFS); 4780 } 4781 4782 if (n->m_len < sizeof(struct sadb_msg)) { 4783 n = m_pullup(n, sizeof(struct sadb_msg)); 4784 if (n == NULL) 4785 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4786 } 4787 4788 n->m_pkthdr.len = 0; 4789 for (nn = n; nn; nn = nn->m_next) 4790 n->m_pkthdr.len += nn->m_len; 4791 4792 newmsg = mtod(n, struct sadb_msg *); 4793 newmsg->sadb_msg_seq = newsav->seq; 4794 newmsg->sadb_msg_errno = 0; 4795 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4796 4797 m_freem(m); 4798 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4799 } 4800 } 4801 4802 /* 4803 * allocating new SPI 4804 * called by key_getspi(). 4805 * OUT: 4806 * 0: failure. 4807 * others: success. 4808 */ 4809 static u_int32_t 4810 key_do_getnewspi(spirange, saidx) 4811 struct sadb_spirange *spirange; 4812 struct secasindex *saidx; 4813 { 4814 u_int32_t newspi; 4815 u_int32_t spmin, spmax; 4816 int count = key_spi_trycnt; 4817 4818 /* set spi range to allocate */ 4819 if (spirange != NULL) { 4820 spmin = spirange->sadb_spirange_min; 4821 spmax = spirange->sadb_spirange_max; 4822 } else { 4823 spmin = key_spi_minval; 4824 spmax = key_spi_maxval; 4825 } 4826 /* IPCOMP needs 2-byte SPI */ 4827 if (saidx->proto == IPPROTO_IPCOMP) { 4828 u_int32_t t; 4829 if (spmin >= 0x10000) 4830 spmin = 0xffff; 4831 if (spmax >= 0x10000) 4832 spmax = 0xffff; 4833 if (spmin > spmax) { 4834 t = spmin; spmin = spmax; spmax = t; 4835 } 4836 } 4837 4838 if (spmin == spmax) { 4839 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 4840 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 4841 return 0; 4842 } 4843 4844 count--; /* taking one cost. */ 4845 newspi = spmin; 4846 4847 } else { 4848 4849 /* init SPI */ 4850 newspi = 0; 4851 4852 /* when requesting to allocate spi ranged */ 4853 while (count--) { 4854 /* generate pseudo-random SPI value ranged. */ 4855 newspi = spmin + (key_random() % (spmax - spmin + 1)); 4856 4857 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 4858 break; 4859 } 4860 4861 if (count == 0 || newspi == 0) { 4862 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 4863 return 0; 4864 } 4865 } 4866 4867 /* statistics */ 4868 keystat.getspi_count = 4869 (keystat.getspi_count + key_spi_trycnt - count) / 2; 4870 4871 return newspi; 4872 } 4873 4874 /* 4875 * SADB_UPDATE processing 4876 * receive 4877 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4878 * key(AE), (identity(SD),) (sensitivity)> 4879 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4880 * and send 4881 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4882 * (identity(SD),) (sensitivity)> 4883 * to the ikmpd. 4884 * 4885 * m will always be freed. 4886 */ 4887 static int 4888 key_update(so, m, mhp) 4889 struct socket *so; 4890 struct mbuf *m; 4891 const struct sadb_msghdr *mhp; 4892 { 4893 struct sadb_sa *sa0; 4894 struct sadb_address *src0, *dst0; 4895 struct secasindex saidx; 4896 struct secashead *sah; 4897 struct secasvar *sav; 4898 u_int16_t proto; 4899 u_int8_t mode; 4900 u_int16_t reqid; 4901 int error; 4902 4903 /* sanity check */ 4904 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4905 panic("key_update: NULL pointer is passed"); 4906 4907 /* map satype to proto */ 4908 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4909 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 4910 return key_senderror(so, m, EINVAL); 4911 } 4912 4913 if (mhp->ext[SADB_EXT_SA] == NULL || 4914 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4915 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4916 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4917 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4918 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4919 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4920 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4921 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4922 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4923 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4924 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4925 return key_senderror(so, m, EINVAL); 4926 } 4927 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4928 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4929 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4930 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4931 return key_senderror(so, m, EINVAL); 4932 } 4933 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4934 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4935 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4936 } else { 4937 mode = IPSEC_MODE_ANY; 4938 reqid = 0; 4939 } 4940 /* XXX boundary checking for other extensions */ 4941 4942 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4943 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4944 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4945 4946 /* XXX boundary check against sa_len */ 4947 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4948 4949 /* get a SA header */ 4950 if ((sah = key_getsah(&saidx)) == NULL) { 4951 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 4952 return key_senderror(so, m, ENOENT); 4953 } 4954 4955 /* set spidx if there */ 4956 /* XXX rewrite */ 4957 error = key_setident(sah, m, mhp); 4958 if (error) 4959 return key_senderror(so, m, error); 4960 4961 /* find a SA with sequence number. */ 4962 #ifdef IPSEC_DOSEQCHECK 4963 if (mhp->msg->sadb_msg_seq != 0 4964 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4965 ipseclog((LOG_DEBUG, 4966 "key_update: no larval SA with sequence %u exists.\n", 4967 mhp->msg->sadb_msg_seq)); 4968 return key_senderror(so, m, ENOENT); 4969 } 4970 #else 4971 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 4972 ipseclog((LOG_DEBUG, 4973 "key_update: no such a SA found (spi:%u)\n", 4974 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4975 return key_senderror(so, m, EINVAL); 4976 } 4977 #endif 4978 4979 /* validity check */ 4980 if (sav->sah->saidx.proto != proto) { 4981 ipseclog((LOG_DEBUG, 4982 "key_update: protocol mismatched (DB=%u param=%u)\n", 4983 sav->sah->saidx.proto, proto)); 4984 return key_senderror(so, m, EINVAL); 4985 } 4986 #ifdef IPSEC_DOSEQCHECK 4987 if (sav->spi != sa0->sadb_sa_spi) { 4988 ipseclog((LOG_DEBUG, 4989 "key_update: SPI mismatched (DB:%u param:%u)\n", 4990 (u_int32_t)ntohl(sav->spi), 4991 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4992 return key_senderror(so, m, EINVAL); 4993 } 4994 #endif 4995 if (sav->pid != mhp->msg->sadb_msg_pid) { 4996 ipseclog((LOG_DEBUG, 4997 "key_update: pid mismatched (DB:%u param:%u)\n", 4998 sav->pid, mhp->msg->sadb_msg_pid)); 4999 return key_senderror(so, m, EINVAL); 5000 } 5001 5002 /* copy sav values */ 5003 error = key_setsaval(sav, m, mhp); 5004 if (error) { 5005 KEY_FREESAV(&sav); 5006 return key_senderror(so, m, error); 5007 } 5008 5009 /* check SA values to be mature. */ 5010 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5011 KEY_FREESAV(&sav); 5012 return key_senderror(so, m, 0); 5013 } 5014 5015 { 5016 struct mbuf *n; 5017 5018 /* set msg buf from mhp */ 5019 n = key_getmsgbuf_x1(m, mhp); 5020 if (n == NULL) { 5021 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5022 return key_senderror(so, m, ENOBUFS); 5023 } 5024 5025 m_freem(m); 5026 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5027 } 5028 } 5029 5030 /* 5031 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5032 * only called by key_update(). 5033 * OUT: 5034 * NULL : not found 5035 * others : found, pointer to a SA. 5036 */ 5037 #ifdef IPSEC_DOSEQCHECK 5038 static struct secasvar * 5039 key_getsavbyseq(sah, seq) 5040 struct secashead *sah; 5041 u_int32_t seq; 5042 { 5043 struct secasvar *sav; 5044 u_int state; 5045 5046 state = SADB_SASTATE_LARVAL; 5047 5048 /* search SAD with sequence number ? */ 5049 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5050 5051 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5052 5053 if (sav->seq == seq) { 5054 SA_ADDREF(sav); 5055 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5056 printf("DP key_getsavbyseq cause " 5057 "refcnt++:%d SA:%p\n", 5058 sav->refcnt, sav)); 5059 return sav; 5060 } 5061 } 5062 5063 return NULL; 5064 } 5065 #endif 5066 5067 /* 5068 * SADB_ADD processing 5069 * add an entry to SA database, when received 5070 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5071 * key(AE), (identity(SD),) (sensitivity)> 5072 * from the ikmpd, 5073 * and send 5074 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5075 * (identity(SD),) (sensitivity)> 5076 * to the ikmpd. 5077 * 5078 * IGNORE identity and sensitivity messages. 5079 * 5080 * m will always be freed. 5081 */ 5082 static int 5083 key_add(so, m, mhp) 5084 struct socket *so; 5085 struct mbuf *m; 5086 const struct sadb_msghdr *mhp; 5087 { 5088 struct sadb_sa *sa0; 5089 struct sadb_address *src0, *dst0; 5090 struct secasindex saidx; 5091 struct secashead *newsah; 5092 struct secasvar *newsav; 5093 u_int16_t proto; 5094 u_int8_t mode; 5095 u_int16_t reqid; 5096 int error; 5097 5098 /* sanity check */ 5099 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5100 panic("key_add: NULL pointer is passed"); 5101 5102 /* map satype to proto */ 5103 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5104 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5105 return key_senderror(so, m, EINVAL); 5106 } 5107 5108 if (mhp->ext[SADB_EXT_SA] == NULL || 5109 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5110 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5111 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5112 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5113 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5114 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5115 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5116 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5117 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5118 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5119 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5120 return key_senderror(so, m, EINVAL); 5121 } 5122 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5123 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5124 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5125 /* XXX need more */ 5126 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5127 return key_senderror(so, m, EINVAL); 5128 } 5129 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5130 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5131 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5132 } else { 5133 mode = IPSEC_MODE_ANY; 5134 reqid = 0; 5135 } 5136 5137 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5138 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5139 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5140 5141 /* XXX boundary check against sa_len */ 5142 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5143 5144 /* get a SA header */ 5145 if ((newsah = key_getsah(&saidx)) == NULL) { 5146 /* create a new SA header */ 5147 if ((newsah = key_newsah(&saidx)) == NULL) { 5148 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5149 return key_senderror(so, m, ENOBUFS); 5150 } 5151 } 5152 5153 /* set spidx if there */ 5154 /* XXX rewrite */ 5155 error = key_setident(newsah, m, mhp); 5156 if (error) { 5157 return key_senderror(so, m, error); 5158 } 5159 5160 /* create new SA entry. */ 5161 /* We can create new SA only if SPI is differenct. */ 5162 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5163 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5164 return key_senderror(so, m, EEXIST); 5165 } 5166 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5167 if (newsav == NULL) { 5168 return key_senderror(so, m, error); 5169 } 5170 5171 /* check SA values to be mature. */ 5172 if ((error = key_mature(newsav)) != 0) { 5173 KEY_FREESAV(&newsav); 5174 return key_senderror(so, m, error); 5175 } 5176 5177 /* 5178 * don't call key_freesav() here, as we would like to keep the SA 5179 * in the database on success. 5180 */ 5181 5182 { 5183 struct mbuf *n; 5184 5185 /* set msg buf from mhp */ 5186 n = key_getmsgbuf_x1(m, mhp); 5187 if (n == NULL) { 5188 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5189 return key_senderror(so, m, ENOBUFS); 5190 } 5191 5192 m_freem(m); 5193 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5194 } 5195 } 5196 5197 /* m is retained */ 5198 static int 5199 key_setident(sah, m, mhp) 5200 struct secashead *sah; 5201 struct mbuf *m; 5202 const struct sadb_msghdr *mhp; 5203 { 5204 const struct sadb_ident *idsrc, *iddst; 5205 int idsrclen, iddstlen; 5206 5207 /* sanity check */ 5208 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5209 panic("key_setident: NULL pointer is passed"); 5210 5211 /* don't make buffer if not there */ 5212 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5213 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5214 sah->idents = NULL; 5215 sah->identd = NULL; 5216 return 0; 5217 } 5218 5219 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5220 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5221 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5222 return EINVAL; 5223 } 5224 5225 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5226 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5227 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5228 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5229 5230 /* validity check */ 5231 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5232 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5233 return EINVAL; 5234 } 5235 5236 switch (idsrc->sadb_ident_type) { 5237 case SADB_IDENTTYPE_PREFIX: 5238 case SADB_IDENTTYPE_FQDN: 5239 case SADB_IDENTTYPE_USERFQDN: 5240 default: 5241 /* XXX do nothing */ 5242 sah->idents = NULL; 5243 sah->identd = NULL; 5244 return 0; 5245 } 5246 5247 /* make structure */ 5248 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5249 if (sah->idents == NULL) { 5250 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5251 return ENOBUFS; 5252 } 5253 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5254 if (sah->identd == NULL) { 5255 KFREE(sah->idents); 5256 sah->idents = NULL; 5257 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5258 return ENOBUFS; 5259 } 5260 bcopy(idsrc, sah->idents, idsrclen); 5261 bcopy(iddst, sah->identd, iddstlen); 5262 5263 return 0; 5264 } 5265 5266 /* 5267 * m will not be freed on return. 5268 * it is caller's responsibility to free the result. 5269 */ 5270 static struct mbuf * 5271 key_getmsgbuf_x1(m, mhp) 5272 struct mbuf *m; 5273 const struct sadb_msghdr *mhp; 5274 { 5275 struct mbuf *n; 5276 5277 /* sanity check */ 5278 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5279 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5280 5281 /* create new sadb_msg to reply. */ 5282 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5283 SADB_EXT_SA, SADB_X_EXT_SA2, 5284 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5285 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5286 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5287 if (!n) 5288 return NULL; 5289 5290 if (n->m_len < sizeof(struct sadb_msg)) { 5291 n = m_pullup(n, sizeof(struct sadb_msg)); 5292 if (n == NULL) 5293 return NULL; 5294 } 5295 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5296 mtod(n, struct sadb_msg *)->sadb_msg_len = 5297 PFKEY_UNIT64(n->m_pkthdr.len); 5298 5299 return n; 5300 } 5301 5302 static int key_delete_all __P((struct socket *, struct mbuf *, 5303 const struct sadb_msghdr *, u_int16_t)); 5304 5305 /* 5306 * SADB_DELETE processing 5307 * receive 5308 * <base, SA(*), address(SD)> 5309 * from the ikmpd, and set SADB_SASTATE_DEAD, 5310 * and send, 5311 * <base, SA(*), address(SD)> 5312 * to the ikmpd. 5313 * 5314 * m will always be freed. 5315 */ 5316 static int 5317 key_delete(so, m, mhp) 5318 struct socket *so; 5319 struct mbuf *m; 5320 const struct sadb_msghdr *mhp; 5321 { 5322 struct sadb_sa *sa0; 5323 struct sadb_address *src0, *dst0; 5324 struct secasindex saidx; 5325 struct secashead *sah; 5326 struct secasvar *sav = NULL; 5327 u_int16_t proto; 5328 5329 /* sanity check */ 5330 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5331 panic("key_delete: NULL pointer is passed"); 5332 5333 /* map satype to proto */ 5334 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5335 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5336 return key_senderror(so, m, EINVAL); 5337 } 5338 5339 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5340 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5341 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5342 return key_senderror(so, m, EINVAL); 5343 } 5344 5345 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5346 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5347 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5348 return key_senderror(so, m, EINVAL); 5349 } 5350 5351 if (mhp->ext[SADB_EXT_SA] == NULL) { 5352 /* 5353 * Caller wants us to delete all non-LARVAL SAs 5354 * that match the src/dst. This is used during 5355 * IKE INITIAL-CONTACT. 5356 */ 5357 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5358 return key_delete_all(so, m, mhp, proto); 5359 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5360 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5361 return key_senderror(so, m, EINVAL); 5362 } 5363 5364 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5365 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5366 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5367 5368 /* XXX boundary check against sa_len */ 5369 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5370 5371 /* get a SA header */ 5372 LIST_FOREACH(sah, &sahtree, chain) { 5373 if (sah->state == SADB_SASTATE_DEAD) 5374 continue; 5375 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5376 continue; 5377 5378 /* get a SA with SPI. */ 5379 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5380 if (sav) 5381 break; 5382 } 5383 if (sah == NULL) { 5384 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5385 return key_senderror(so, m, ENOENT); 5386 } 5387 5388 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5389 KEY_FREESAV(&sav); 5390 5391 { 5392 struct mbuf *n; 5393 struct sadb_msg *newmsg; 5394 5395 /* create new sadb_msg to reply. */ 5396 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5397 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5398 if (!n) 5399 return key_senderror(so, m, ENOBUFS); 5400 5401 if (n->m_len < sizeof(struct sadb_msg)) { 5402 n = m_pullup(n, sizeof(struct sadb_msg)); 5403 if (n == NULL) 5404 return key_senderror(so, m, ENOBUFS); 5405 } 5406 newmsg = mtod(n, struct sadb_msg *); 5407 newmsg->sadb_msg_errno = 0; 5408 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5409 5410 m_freem(m); 5411 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5412 } 5413 } 5414 5415 /* 5416 * delete all SAs for src/dst. Called from key_delete(). 5417 */ 5418 static int 5419 key_delete_all(so, m, mhp, proto) 5420 struct socket *so; 5421 struct mbuf *m; 5422 const struct sadb_msghdr *mhp; 5423 u_int16_t proto; 5424 { 5425 struct sadb_address *src0, *dst0; 5426 struct secasindex saidx; 5427 struct secashead *sah; 5428 struct secasvar *sav, *nextsav; 5429 u_int stateidx, state; 5430 5431 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5432 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5433 5434 /* XXX boundary check against sa_len */ 5435 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5436 5437 LIST_FOREACH(sah, &sahtree, chain) { 5438 if (sah->state == SADB_SASTATE_DEAD) 5439 continue; 5440 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5441 continue; 5442 5443 /* Delete all non-LARVAL SAs. */ 5444 for (stateidx = 0; 5445 stateidx < _ARRAYLEN(saorder_state_alive); 5446 stateidx++) { 5447 state = saorder_state_alive[stateidx]; 5448 if (state == SADB_SASTATE_LARVAL) 5449 continue; 5450 for (sav = LIST_FIRST(&sah->savtree[state]); 5451 sav != NULL; sav = nextsav) { 5452 nextsav = LIST_NEXT(sav, chain); 5453 /* sanity check */ 5454 if (sav->state != state) { 5455 ipseclog((LOG_DEBUG, "key_delete_all: " 5456 "invalid sav->state " 5457 "(queue: %d SA: %d)\n", 5458 state, sav->state)); 5459 continue; 5460 } 5461 5462 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5463 KEY_FREESAV(&sav); 5464 } 5465 } 5466 } 5467 { 5468 struct mbuf *n; 5469 struct sadb_msg *newmsg; 5470 5471 /* create new sadb_msg to reply. */ 5472 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5473 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5474 if (!n) 5475 return key_senderror(so, m, ENOBUFS); 5476 5477 if (n->m_len < sizeof(struct sadb_msg)) { 5478 n = m_pullup(n, sizeof(struct sadb_msg)); 5479 if (n == NULL) 5480 return key_senderror(so, m, ENOBUFS); 5481 } 5482 newmsg = mtod(n, struct sadb_msg *); 5483 newmsg->sadb_msg_errno = 0; 5484 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5485 5486 m_freem(m); 5487 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5488 } 5489 } 5490 5491 /* 5492 * SADB_GET processing 5493 * receive 5494 * <base, SA(*), address(SD)> 5495 * from the ikmpd, and get a SP and a SA to respond, 5496 * and send, 5497 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5498 * (identity(SD),) (sensitivity)> 5499 * to the ikmpd. 5500 * 5501 * m will always be freed. 5502 */ 5503 static int 5504 key_get(so, m, mhp) 5505 struct socket *so; 5506 struct mbuf *m; 5507 const struct sadb_msghdr *mhp; 5508 { 5509 struct sadb_sa *sa0; 5510 struct sadb_address *src0, *dst0; 5511 struct secasindex saidx; 5512 struct secashead *sah; 5513 struct secasvar *sav = NULL; 5514 u_int16_t proto; 5515 5516 /* sanity check */ 5517 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5518 panic("key_get: NULL pointer is passed"); 5519 5520 /* map satype to proto */ 5521 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5522 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5523 return key_senderror(so, m, EINVAL); 5524 } 5525 5526 if (mhp->ext[SADB_EXT_SA] == NULL || 5527 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5528 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5529 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5530 return key_senderror(so, m, EINVAL); 5531 } 5532 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5533 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5534 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5535 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5536 return key_senderror(so, m, EINVAL); 5537 } 5538 5539 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5540 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5541 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5542 5543 /* XXX boundary check against sa_len */ 5544 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5545 5546 /* get a SA header */ 5547 LIST_FOREACH(sah, &sahtree, chain) { 5548 if (sah->state == SADB_SASTATE_DEAD) 5549 continue; 5550 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5551 continue; 5552 5553 /* get a SA with SPI. */ 5554 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5555 if (sav) 5556 break; 5557 } 5558 if (sah == NULL) { 5559 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5560 return key_senderror(so, m, ENOENT); 5561 } 5562 5563 { 5564 struct mbuf *n; 5565 u_int8_t satype; 5566 5567 /* map proto to satype */ 5568 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5569 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5570 return key_senderror(so, m, EINVAL); 5571 } 5572 5573 /* create new sadb_msg to reply. */ 5574 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5575 mhp->msg->sadb_msg_pid); 5576 if (!n) 5577 return key_senderror(so, m, ENOBUFS); 5578 5579 m_freem(m); 5580 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5581 } 5582 } 5583 5584 /* XXX make it sysctl-configurable? */ 5585 static void 5586 key_getcomb_setlifetime(comb) 5587 struct sadb_comb *comb; 5588 { 5589 5590 comb->sadb_comb_soft_allocations = 1; 5591 comb->sadb_comb_hard_allocations = 1; 5592 comb->sadb_comb_soft_bytes = 0; 5593 comb->sadb_comb_hard_bytes = 0; 5594 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5595 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5596 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5597 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5598 } 5599 5600 /* 5601 * XXX reorder combinations by preference 5602 * XXX no idea if the user wants ESP authentication or not 5603 */ 5604 static struct mbuf * 5605 key_getcomb_esp() 5606 { 5607 struct sadb_comb *comb; 5608 struct enc_xform *algo; 5609 struct mbuf *result = NULL, *m, *n; 5610 int encmin; 5611 int i, off, o; 5612 int totlen; 5613 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5614 5615 m = NULL; 5616 for (i = 1; i <= SADB_EALG_MAX; i++) { 5617 algo = esp_algorithm_lookup(i); 5618 if (algo == NULL) 5619 continue; 5620 5621 /* discard algorithms with key size smaller than system min */ 5622 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5623 continue; 5624 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5625 encmin = ipsec_esp_keymin; 5626 else 5627 encmin = _BITS(algo->minkey); 5628 5629 if (ipsec_esp_auth) 5630 m = key_getcomb_ah(); 5631 else { 5632 IPSEC_ASSERT(l <= MLEN, 5633 ("key_getcomb_esp: l=%u > MLEN=%lu", 5634 l, (u_long) MLEN)); 5635 MGET(m, M_DONTWAIT, MT_DATA); 5636 if (m) { 5637 M_ALIGN(m, l); 5638 m->m_len = l; 5639 m->m_next = NULL; 5640 bzero(mtod(m, void *), m->m_len); 5641 } 5642 } 5643 if (!m) 5644 goto fail; 5645 5646 totlen = 0; 5647 for (n = m; n; n = n->m_next) 5648 totlen += n->m_len; 5649 IPSEC_ASSERT((totlen % l) == 0, 5650 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5651 5652 for (off = 0; off < totlen; off += l) { 5653 n = m_pulldown(m, off, l, &o); 5654 if (!n) { 5655 /* m is already freed */ 5656 goto fail; 5657 } 5658 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5659 bzero(comb, sizeof(*comb)); 5660 key_getcomb_setlifetime(comb); 5661 comb->sadb_comb_encrypt = i; 5662 comb->sadb_comb_encrypt_minbits = encmin; 5663 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5664 } 5665 5666 if (!result) 5667 result = m; 5668 else 5669 m_cat(result, m); 5670 } 5671 5672 return result; 5673 5674 fail: 5675 if (result) 5676 m_freem(result); 5677 return NULL; 5678 } 5679 5680 static void 5681 key_getsizes_ah( 5682 const struct auth_hash *ah, 5683 int alg, 5684 u_int16_t* ksmin, 5685 u_int16_t* ksmax) 5686 { 5687 *ksmin = *ksmax = ah->keysize; 5688 if (ah->keysize == 0) { 5689 /* 5690 * Transform takes arbitrary key size but algorithm 5691 * key size is restricted. Enforce this here. 5692 */ 5693 switch (alg) { 5694 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5695 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5696 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 5697 default: 5698 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5699 alg)); 5700 break; 5701 } 5702 } 5703 } 5704 5705 /* 5706 * XXX reorder combinations by preference 5707 */ 5708 static struct mbuf * 5709 key_getcomb_ah() 5710 { 5711 struct sadb_comb *comb; 5712 struct auth_hash *algo; 5713 struct mbuf *m; 5714 u_int16_t minkeysize, maxkeysize; 5715 int i; 5716 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5717 5718 m = NULL; 5719 for (i = 1; i <= SADB_AALG_MAX; i++) { 5720 #if 1 5721 /* we prefer HMAC algorithms, not old algorithms */ 5722 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5723 continue; 5724 #endif 5725 algo = ah_algorithm_lookup(i); 5726 if (!algo) 5727 continue; 5728 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5729 /* discard algorithms with key size smaller than system min */ 5730 if (_BITS(minkeysize) < ipsec_ah_keymin) 5731 continue; 5732 5733 if (!m) { 5734 IPSEC_ASSERT(l <= MLEN, 5735 ("key_getcomb_ah: l=%u > MLEN=%lu", 5736 l, (u_long) MLEN)); 5737 MGET(m, M_DONTWAIT, MT_DATA); 5738 if (m) { 5739 M_ALIGN(m, l); 5740 m->m_len = l; 5741 m->m_next = NULL; 5742 } 5743 } else 5744 M_PREPEND(m, l, M_DONTWAIT); 5745 if (!m) 5746 return NULL; 5747 5748 comb = mtod(m, struct sadb_comb *); 5749 bzero(comb, sizeof(*comb)); 5750 key_getcomb_setlifetime(comb); 5751 comb->sadb_comb_auth = i; 5752 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5753 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5754 } 5755 5756 return m; 5757 } 5758 5759 /* 5760 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 5761 * XXX reorder combinations by preference 5762 */ 5763 static struct mbuf * 5764 key_getcomb_ipcomp() 5765 { 5766 struct sadb_comb *comb; 5767 struct comp_algo *algo; 5768 struct mbuf *m; 5769 int i; 5770 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5771 5772 m = NULL; 5773 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5774 algo = ipcomp_algorithm_lookup(i); 5775 if (!algo) 5776 continue; 5777 5778 if (!m) { 5779 IPSEC_ASSERT(l <= MLEN, 5780 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 5781 l, (u_long) MLEN)); 5782 MGET(m, M_DONTWAIT, MT_DATA); 5783 if (m) { 5784 M_ALIGN(m, l); 5785 m->m_len = l; 5786 m->m_next = NULL; 5787 } 5788 } else 5789 M_PREPEND(m, l, M_DONTWAIT); 5790 if (!m) 5791 return NULL; 5792 5793 comb = mtod(m, struct sadb_comb *); 5794 bzero(comb, sizeof(*comb)); 5795 key_getcomb_setlifetime(comb); 5796 comb->sadb_comb_encrypt = i; 5797 /* what should we set into sadb_comb_*_{min,max}bits? */ 5798 } 5799 5800 return m; 5801 } 5802 5803 /* 5804 * XXX no way to pass mode (transport/tunnel) to userland 5805 * XXX replay checking? 5806 * XXX sysctl interface to ipsec_{ah,esp}_keymin 5807 */ 5808 static struct mbuf * 5809 key_getprop(saidx) 5810 const struct secasindex *saidx; 5811 { 5812 struct sadb_prop *prop; 5813 struct mbuf *m, *n; 5814 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5815 int totlen; 5816 5817 switch (saidx->proto) { 5818 case IPPROTO_ESP: 5819 m = key_getcomb_esp(); 5820 break; 5821 case IPPROTO_AH: 5822 m = key_getcomb_ah(); 5823 break; 5824 case IPPROTO_IPCOMP: 5825 m = key_getcomb_ipcomp(); 5826 break; 5827 default: 5828 return NULL; 5829 } 5830 5831 if (!m) 5832 return NULL; 5833 M_PREPEND(m, l, M_DONTWAIT); 5834 if (!m) 5835 return NULL; 5836 5837 totlen = 0; 5838 for (n = m; n; n = n->m_next) 5839 totlen += n->m_len; 5840 5841 prop = mtod(m, struct sadb_prop *); 5842 bzero(prop, sizeof(*prop)); 5843 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5844 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5845 prop->sadb_prop_replay = 32; /* XXX */ 5846 5847 return m; 5848 } 5849 5850 /* 5851 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5852 * send 5853 * <base, SA, address(SD), (address(P)), x_policy, 5854 * (identity(SD),) (sensitivity,) proposal> 5855 * to KMD, and expect to receive 5856 * <base> with SADB_ACQUIRE if error occurred, 5857 * or 5858 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5859 * from KMD by PF_KEY. 5860 * 5861 * XXX x_policy is outside of RFC2367 (KAME extension). 5862 * XXX sensitivity is not supported. 5863 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5864 * see comment for key_getcomb_ipcomp(). 5865 * 5866 * OUT: 5867 * 0 : succeed 5868 * others: error number 5869 */ 5870 static int 5871 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5872 { 5873 struct mbuf *result = NULL, *m; 5874 #ifndef IPSEC_NONBLOCK_ACQUIRE 5875 struct secacq *newacq; 5876 #endif 5877 u_int8_t satype; 5878 int error = -1; 5879 u_int32_t seq; 5880 5881 /* sanity check */ 5882 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 5883 satype = key_proto2satype(saidx->proto); 5884 IPSEC_ASSERT(satype != 0, 5885 ("key_acquire: null satype, protocol %u", saidx->proto)); 5886 5887 #ifndef IPSEC_NONBLOCK_ACQUIRE 5888 /* 5889 * We never do anything about acquirng SA. There is anather 5890 * solution that kernel blocks to send SADB_ACQUIRE message until 5891 * getting something message from IKEd. In later case, to be 5892 * managed with ACQUIRING list. 5893 */ 5894 /* Get an entry to check whether sending message or not. */ 5895 if ((newacq = key_getacq(saidx)) != NULL) { 5896 if (key_blockacq_count < newacq->count) { 5897 /* reset counter and do send message. */ 5898 newacq->count = 0; 5899 } else { 5900 /* increment counter and do nothing. */ 5901 newacq->count++; 5902 return 0; 5903 } 5904 } else { 5905 /* make new entry for blocking to send SADB_ACQUIRE. */ 5906 if ((newacq = key_newacq(saidx)) == NULL) 5907 return ENOBUFS; 5908 5909 /* add to acqtree */ 5910 LIST_INSERT_HEAD(&acqtree, newacq, chain); 5911 } 5912 #endif 5913 5914 5915 #ifndef IPSEC_NONBLOCK_ACQUIRE 5916 seq = newacq->seq; 5917 #else 5918 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 5919 #endif 5920 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5921 if (!m) { 5922 error = ENOBUFS; 5923 goto fail; 5924 } 5925 result = m; 5926 5927 /* set sadb_address for saidx's. */ 5928 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5929 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5930 if (!m) { 5931 error = ENOBUFS; 5932 goto fail; 5933 } 5934 m_cat(result, m); 5935 5936 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5937 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5938 if (!m) { 5939 error = ENOBUFS; 5940 goto fail; 5941 } 5942 m_cat(result, m); 5943 5944 /* XXX proxy address (optional) */ 5945 5946 /* set sadb_x_policy */ 5947 if (sp) { 5948 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5949 if (!m) { 5950 error = ENOBUFS; 5951 goto fail; 5952 } 5953 m_cat(result, m); 5954 } 5955 5956 /* XXX identity (optional) */ 5957 #if 0 5958 if (idexttype && fqdn) { 5959 /* create identity extension (FQDN) */ 5960 struct sadb_ident *id; 5961 int fqdnlen; 5962 5963 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5964 id = (struct sadb_ident *)p; 5965 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5966 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5967 id->sadb_ident_exttype = idexttype; 5968 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5969 bcopy(fqdn, id + 1, fqdnlen); 5970 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5971 } 5972 5973 if (idexttype) { 5974 /* create identity extension (USERFQDN) */ 5975 struct sadb_ident *id; 5976 int userfqdnlen; 5977 5978 if (userfqdn) { 5979 /* +1 for terminating-NUL */ 5980 userfqdnlen = strlen(userfqdn) + 1; 5981 } else 5982 userfqdnlen = 0; 5983 id = (struct sadb_ident *)p; 5984 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5985 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5986 id->sadb_ident_exttype = idexttype; 5987 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5988 /* XXX is it correct? */ 5989 if (curlwp) 5990 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 5991 if (userfqdn && userfqdnlen) 5992 bcopy(userfqdn, id + 1, userfqdnlen); 5993 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5994 } 5995 #endif 5996 5997 /* XXX sensitivity (optional) */ 5998 5999 /* create proposal/combination extension */ 6000 m = key_getprop(saidx); 6001 #if 0 6002 /* 6003 * spec conformant: always attach proposal/combination extension, 6004 * the problem is that we have no way to attach it for ipcomp, 6005 * due to the way sadb_comb is declared in RFC2367. 6006 */ 6007 if (!m) { 6008 error = ENOBUFS; 6009 goto fail; 6010 } 6011 m_cat(result, m); 6012 #else 6013 /* 6014 * outside of spec; make proposal/combination extension optional. 6015 */ 6016 if (m) 6017 m_cat(result, m); 6018 #endif 6019 6020 if ((result->m_flags & M_PKTHDR) == 0) { 6021 error = EINVAL; 6022 goto fail; 6023 } 6024 6025 if (result->m_len < sizeof(struct sadb_msg)) { 6026 result = m_pullup(result, sizeof(struct sadb_msg)); 6027 if (result == NULL) { 6028 error = ENOBUFS; 6029 goto fail; 6030 } 6031 } 6032 6033 result->m_pkthdr.len = 0; 6034 for (m = result; m; m = m->m_next) 6035 result->m_pkthdr.len += m->m_len; 6036 6037 mtod(result, struct sadb_msg *)->sadb_msg_len = 6038 PFKEY_UNIT64(result->m_pkthdr.len); 6039 6040 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6041 6042 fail: 6043 if (result) 6044 m_freem(result); 6045 return error; 6046 } 6047 6048 #ifndef IPSEC_NONBLOCK_ACQUIRE 6049 static struct secacq * 6050 key_newacq(const struct secasindex *saidx) 6051 { 6052 struct secacq *newacq; 6053 6054 /* get new entry */ 6055 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6056 if (newacq == NULL) { 6057 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6058 return NULL; 6059 } 6060 bzero(newacq, sizeof(*newacq)); 6061 6062 /* copy secindex */ 6063 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6064 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6065 newacq->created = time_second; 6066 newacq->count = 0; 6067 6068 return newacq; 6069 } 6070 6071 static struct secacq * 6072 key_getacq(const struct secasindex *saidx) 6073 { 6074 struct secacq *acq; 6075 6076 LIST_FOREACH(acq, &acqtree, chain) { 6077 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6078 return acq; 6079 } 6080 6081 return NULL; 6082 } 6083 6084 static struct secacq * 6085 key_getacqbyseq(seq) 6086 u_int32_t seq; 6087 { 6088 struct secacq *acq; 6089 6090 LIST_FOREACH(acq, &acqtree, chain) { 6091 if (acq->seq == seq) 6092 return acq; 6093 } 6094 6095 return NULL; 6096 } 6097 #endif 6098 6099 static struct secspacq * 6100 key_newspacq(spidx) 6101 struct secpolicyindex *spidx; 6102 { 6103 struct secspacq *acq; 6104 6105 /* get new entry */ 6106 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6107 if (acq == NULL) { 6108 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6109 return NULL; 6110 } 6111 bzero(acq, sizeof(*acq)); 6112 6113 /* copy secindex */ 6114 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6115 acq->created = time_second; 6116 acq->count = 0; 6117 6118 return acq; 6119 } 6120 6121 static struct secspacq * 6122 key_getspacq(spidx) 6123 struct secpolicyindex *spidx; 6124 { 6125 struct secspacq *acq; 6126 6127 LIST_FOREACH(acq, &spacqtree, chain) { 6128 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6129 return acq; 6130 } 6131 6132 return NULL; 6133 } 6134 6135 /* 6136 * SADB_ACQUIRE processing, 6137 * in first situation, is receiving 6138 * <base> 6139 * from the ikmpd, and clear sequence of its secasvar entry. 6140 * 6141 * In second situation, is receiving 6142 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6143 * from a user land process, and return 6144 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6145 * to the socket. 6146 * 6147 * m will always be freed. 6148 */ 6149 static int 6150 key_acquire2(so, m, mhp) 6151 struct socket *so; 6152 struct mbuf *m; 6153 const struct sadb_msghdr *mhp; 6154 { 6155 const struct sadb_address *src0, *dst0; 6156 struct secasindex saidx; 6157 struct secashead *sah; 6158 u_int16_t proto; 6159 int error; 6160 6161 /* sanity check */ 6162 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6163 panic("key_acquire2: NULL pointer is passed"); 6164 6165 /* 6166 * Error message from KMd. 6167 * We assume that if error was occurred in IKEd, the length of PFKEY 6168 * message is equal to the size of sadb_msg structure. 6169 * We do not raise error even if error occurred in this function. 6170 */ 6171 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6172 #ifndef IPSEC_NONBLOCK_ACQUIRE 6173 struct secacq *acq; 6174 6175 /* check sequence number */ 6176 if (mhp->msg->sadb_msg_seq == 0) { 6177 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6178 m_freem(m); 6179 return 0; 6180 } 6181 6182 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6183 /* 6184 * the specified larval SA is already gone, or we got 6185 * a bogus sequence number. we can silently ignore it. 6186 */ 6187 m_freem(m); 6188 return 0; 6189 } 6190 6191 /* reset acq counter in order to deletion by timehander. */ 6192 acq->created = time_second; 6193 acq->count = 0; 6194 #endif 6195 m_freem(m); 6196 return 0; 6197 } 6198 6199 /* 6200 * This message is from user land. 6201 */ 6202 6203 /* map satype to proto */ 6204 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6205 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6206 return key_senderror(so, m, EINVAL); 6207 } 6208 6209 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6210 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6211 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6212 /* error */ 6213 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6214 return key_senderror(so, m, EINVAL); 6215 } 6216 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6217 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6218 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6219 /* error */ 6220 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6221 return key_senderror(so, m, EINVAL); 6222 } 6223 6224 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6225 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6226 6227 /* XXX boundary check against sa_len */ 6228 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6229 6230 /* get a SA index */ 6231 LIST_FOREACH(sah, &sahtree, chain) { 6232 if (sah->state == SADB_SASTATE_DEAD) 6233 continue; 6234 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6235 break; 6236 } 6237 if (sah != NULL) { 6238 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6239 return key_senderror(so, m, EEXIST); 6240 } 6241 6242 error = key_acquire(&saidx, NULL); 6243 if (error != 0) { 6244 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6245 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6246 return key_senderror(so, m, error); 6247 } 6248 6249 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6250 } 6251 6252 /* 6253 * SADB_REGISTER processing. 6254 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6255 * receive 6256 * <base> 6257 * from the ikmpd, and register a socket to send PF_KEY messages, 6258 * and send 6259 * <base, supported> 6260 * to KMD by PF_KEY. 6261 * If socket is detached, must free from regnode. 6262 * 6263 * m will always be freed. 6264 */ 6265 static int 6266 key_register(so, m, mhp) 6267 struct socket *so; 6268 struct mbuf *m; 6269 const struct sadb_msghdr *mhp; 6270 { 6271 struct secreg *reg, *newreg = 0; 6272 6273 /* sanity check */ 6274 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6275 panic("key_register: NULL pointer is passed"); 6276 6277 /* check for invalid register message */ 6278 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6279 return key_senderror(so, m, EINVAL); 6280 6281 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6282 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6283 goto setmsg; 6284 6285 /* check whether existing or not */ 6286 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6287 if (reg->so == so) { 6288 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6289 return key_senderror(so, m, EEXIST); 6290 } 6291 } 6292 6293 /* create regnode */ 6294 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6295 if (newreg == NULL) { 6296 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6297 return key_senderror(so, m, ENOBUFS); 6298 } 6299 bzero(newreg, sizeof(*newreg)); 6300 6301 newreg->so = so; 6302 ((struct keycb *)sotorawcb(so))->kp_registered++; 6303 6304 /* add regnode to regtree. */ 6305 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6306 6307 setmsg: 6308 { 6309 struct mbuf *n; 6310 struct sadb_msg *newmsg; 6311 struct sadb_supported *sup; 6312 u_int len, alen, elen; 6313 int off; 6314 int i; 6315 struct sadb_alg *alg; 6316 6317 /* create new sadb_msg to reply. */ 6318 alen = 0; 6319 for (i = 1; i <= SADB_AALG_MAX; i++) { 6320 if (ah_algorithm_lookup(i)) 6321 alen += sizeof(struct sadb_alg); 6322 } 6323 if (alen) 6324 alen += sizeof(struct sadb_supported); 6325 elen = 0; 6326 for (i = 1; i <= SADB_EALG_MAX; i++) { 6327 if (esp_algorithm_lookup(i)) 6328 elen += sizeof(struct sadb_alg); 6329 } 6330 if (elen) 6331 elen += sizeof(struct sadb_supported); 6332 6333 len = sizeof(struct sadb_msg) + alen + elen; 6334 6335 if (len > MCLBYTES) 6336 return key_senderror(so, m, ENOBUFS); 6337 6338 MGETHDR(n, M_DONTWAIT, MT_DATA); 6339 if (len > MHLEN) { 6340 MCLGET(n, M_DONTWAIT); 6341 if ((n->m_flags & M_EXT) == 0) { 6342 m_freem(n); 6343 n = NULL; 6344 } 6345 } 6346 if (!n) 6347 return key_senderror(so, m, ENOBUFS); 6348 6349 n->m_pkthdr.len = n->m_len = len; 6350 n->m_next = NULL; 6351 off = 0; 6352 6353 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6354 newmsg = mtod(n, struct sadb_msg *); 6355 newmsg->sadb_msg_errno = 0; 6356 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6357 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6358 6359 /* for authentication algorithm */ 6360 if (alen) { 6361 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6362 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6363 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6364 off += PFKEY_ALIGN8(sizeof(*sup)); 6365 6366 for (i = 1; i <= SADB_AALG_MAX; i++) { 6367 struct auth_hash *aalgo; 6368 u_int16_t minkeysize, maxkeysize; 6369 6370 aalgo = ah_algorithm_lookup(i); 6371 if (!aalgo) 6372 continue; 6373 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6374 alg->sadb_alg_id = i; 6375 alg->sadb_alg_ivlen = 0; 6376 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6377 alg->sadb_alg_minbits = _BITS(minkeysize); 6378 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6379 off += PFKEY_ALIGN8(sizeof(*alg)); 6380 } 6381 } 6382 6383 /* for encryption algorithm */ 6384 if (elen) { 6385 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6386 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6387 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6388 off += PFKEY_ALIGN8(sizeof(*sup)); 6389 6390 for (i = 1; i <= SADB_EALG_MAX; i++) { 6391 struct enc_xform *ealgo; 6392 6393 ealgo = esp_algorithm_lookup(i); 6394 if (!ealgo) 6395 continue; 6396 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6397 alg->sadb_alg_id = i; 6398 alg->sadb_alg_ivlen = ealgo->blocksize; 6399 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6400 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6401 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6402 } 6403 } 6404 6405 #ifdef DIAGNOSTIC 6406 if (off != len) 6407 panic("length assumption failed in key_register"); 6408 #endif 6409 6410 m_freem(m); 6411 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6412 } 6413 } 6414 6415 /* 6416 * free secreg entry registered. 6417 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6418 */ 6419 void 6420 key_freereg(so) 6421 struct socket *so; 6422 { 6423 struct secreg *reg; 6424 int i; 6425 6426 /* sanity check */ 6427 if (so == NULL) 6428 panic("key_freereg: NULL pointer is passed"); 6429 6430 /* 6431 * check whether existing or not. 6432 * check all type of SA, because there is a potential that 6433 * one socket is registered to multiple type of SA. 6434 */ 6435 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6436 LIST_FOREACH(reg, ®tree[i], chain) { 6437 if (reg->so == so 6438 && __LIST_CHAINED(reg)) { 6439 LIST_REMOVE(reg, chain); 6440 KFREE(reg); 6441 break; 6442 } 6443 } 6444 } 6445 6446 return; 6447 } 6448 6449 /* 6450 * SADB_EXPIRE processing 6451 * send 6452 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6453 * to KMD by PF_KEY. 6454 * NOTE: We send only soft lifetime extension. 6455 * 6456 * OUT: 0 : succeed 6457 * others : error number 6458 */ 6459 static int 6460 key_expire(sav) 6461 struct secasvar *sav; 6462 { 6463 int s; 6464 int satype; 6465 struct mbuf *result = NULL, *m; 6466 int len; 6467 int error = -1; 6468 struct sadb_lifetime *lt; 6469 6470 /* XXX: Why do we lock ? */ 6471 s = splsoftnet(); /*called from softclock()*/ 6472 6473 /* sanity check */ 6474 if (sav == NULL) 6475 panic("key_expire: NULL pointer is passed"); 6476 if (sav->sah == NULL) 6477 panic("key_expire: Why was SA index in SA NULL"); 6478 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6479 panic("key_expire: invalid proto is passed"); 6480 6481 /* set msg header */ 6482 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6483 if (!m) { 6484 error = ENOBUFS; 6485 goto fail; 6486 } 6487 result = m; 6488 6489 /* create SA extension */ 6490 m = key_setsadbsa(sav); 6491 if (!m) { 6492 error = ENOBUFS; 6493 goto fail; 6494 } 6495 m_cat(result, m); 6496 6497 /* create SA extension */ 6498 m = key_setsadbxsa2(sav->sah->saidx.mode, 6499 sav->replay ? sav->replay->count : 0, 6500 sav->sah->saidx.reqid); 6501 if (!m) { 6502 error = ENOBUFS; 6503 goto fail; 6504 } 6505 m_cat(result, m); 6506 6507 /* create lifetime extension (current and soft) */ 6508 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6509 m = key_alloc_mbuf(len); 6510 if (!m || m->m_next) { /*XXX*/ 6511 if (m) 6512 m_freem(m); 6513 error = ENOBUFS; 6514 goto fail; 6515 } 6516 bzero(mtod(m, void *), len); 6517 lt = mtod(m, struct sadb_lifetime *); 6518 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6519 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6520 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6521 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6522 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6523 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6524 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6525 bcopy(sav->lft_s, lt, sizeof(*lt)); 6526 m_cat(result, m); 6527 6528 /* set sadb_address for source */ 6529 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6530 &sav->sah->saidx.src.sa, 6531 FULLMASK, IPSEC_ULPROTO_ANY); 6532 if (!m) { 6533 error = ENOBUFS; 6534 goto fail; 6535 } 6536 m_cat(result, m); 6537 6538 /* set sadb_address for destination */ 6539 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6540 &sav->sah->saidx.dst.sa, 6541 FULLMASK, IPSEC_ULPROTO_ANY); 6542 if (!m) { 6543 error = ENOBUFS; 6544 goto fail; 6545 } 6546 m_cat(result, m); 6547 6548 if ((result->m_flags & M_PKTHDR) == 0) { 6549 error = EINVAL; 6550 goto fail; 6551 } 6552 6553 if (result->m_len < sizeof(struct sadb_msg)) { 6554 result = m_pullup(result, sizeof(struct sadb_msg)); 6555 if (result == NULL) { 6556 error = ENOBUFS; 6557 goto fail; 6558 } 6559 } 6560 6561 result->m_pkthdr.len = 0; 6562 for (m = result; m; m = m->m_next) 6563 result->m_pkthdr.len += m->m_len; 6564 6565 mtod(result, struct sadb_msg *)->sadb_msg_len = 6566 PFKEY_UNIT64(result->m_pkthdr.len); 6567 6568 splx(s); 6569 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6570 6571 fail: 6572 if (result) 6573 m_freem(result); 6574 splx(s); 6575 return error; 6576 } 6577 6578 /* 6579 * SADB_FLUSH processing 6580 * receive 6581 * <base> 6582 * from the ikmpd, and free all entries in secastree. 6583 * and send, 6584 * <base> 6585 * to the ikmpd. 6586 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6587 * 6588 * m will always be freed. 6589 */ 6590 static int 6591 key_flush(so, m, mhp) 6592 struct socket *so; 6593 struct mbuf *m; 6594 const struct sadb_msghdr *mhp; 6595 { 6596 struct sadb_msg *newmsg; 6597 struct secashead *sah, *nextsah; 6598 struct secasvar *sav, *nextsav; 6599 u_int16_t proto; 6600 u_int8_t state; 6601 u_int stateidx; 6602 6603 /* sanity check */ 6604 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6605 panic("key_flush: NULL pointer is passed"); 6606 6607 /* map satype to proto */ 6608 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6609 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6610 return key_senderror(so, m, EINVAL); 6611 } 6612 6613 /* no SATYPE specified, i.e. flushing all SA. */ 6614 for (sah = LIST_FIRST(&sahtree); 6615 sah != NULL; 6616 sah = nextsah) { 6617 nextsah = LIST_NEXT(sah, chain); 6618 6619 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6620 && proto != sah->saidx.proto) 6621 continue; 6622 6623 for (stateidx = 0; 6624 stateidx < _ARRAYLEN(saorder_state_alive); 6625 stateidx++) { 6626 state = saorder_state_any[stateidx]; 6627 for (sav = LIST_FIRST(&sah->savtree[state]); 6628 sav != NULL; 6629 sav = nextsav) { 6630 6631 nextsav = LIST_NEXT(sav, chain); 6632 6633 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6634 KEY_FREESAV(&sav); 6635 } 6636 } 6637 6638 sah->state = SADB_SASTATE_DEAD; 6639 } 6640 6641 if (m->m_len < sizeof(struct sadb_msg) || 6642 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6643 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6644 return key_senderror(so, m, ENOBUFS); 6645 } 6646 6647 if (m->m_next) 6648 m_freem(m->m_next); 6649 m->m_next = NULL; 6650 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6651 newmsg = mtod(m, struct sadb_msg *); 6652 newmsg->sadb_msg_errno = 0; 6653 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6654 6655 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6656 } 6657 6658 6659 static struct mbuf * 6660 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6661 { 6662 struct secashead *sah; 6663 struct secasvar *sav; 6664 u_int16_t proto; 6665 u_int stateidx; 6666 u_int8_t satype; 6667 u_int8_t state; 6668 int cnt; 6669 struct mbuf *m, *n, *prev; 6670 int totlen; 6671 6672 *lenp = 0; 6673 6674 /* map satype to proto */ 6675 if ((proto = key_satype2proto(req_satype)) == 0) { 6676 *errorp = EINVAL; 6677 return (NULL); 6678 } 6679 6680 /* count sav entries to be sent to userland. */ 6681 cnt = 0; 6682 LIST_FOREACH(sah, &sahtree, chain) { 6683 if (req_satype != SADB_SATYPE_UNSPEC && 6684 proto != sah->saidx.proto) 6685 continue; 6686 6687 for (stateidx = 0; 6688 stateidx < _ARRAYLEN(saorder_state_any); 6689 stateidx++) { 6690 state = saorder_state_any[stateidx]; 6691 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6692 cnt++; 6693 } 6694 } 6695 } 6696 6697 if (cnt == 0) { 6698 *errorp = ENOENT; 6699 return (NULL); 6700 } 6701 6702 /* send this to the userland, one at a time. */ 6703 m = NULL; 6704 prev = m; 6705 LIST_FOREACH(sah, &sahtree, chain) { 6706 if (req_satype != SADB_SATYPE_UNSPEC && 6707 proto != sah->saidx.proto) 6708 continue; 6709 6710 /* map proto to satype */ 6711 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6712 m_freem(m); 6713 *errorp = EINVAL; 6714 return (NULL); 6715 } 6716 6717 for (stateidx = 0; 6718 stateidx < _ARRAYLEN(saorder_state_any); 6719 stateidx++) { 6720 state = saorder_state_any[stateidx]; 6721 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6722 n = key_setdumpsa(sav, SADB_DUMP, satype, 6723 --cnt, pid); 6724 if (!n) { 6725 m_freem(m); 6726 *errorp = ENOBUFS; 6727 return (NULL); 6728 } 6729 6730 totlen += n->m_pkthdr.len; 6731 if (!m) 6732 m = n; 6733 else 6734 prev->m_nextpkt = n; 6735 prev = n; 6736 } 6737 } 6738 } 6739 6740 if (!m) { 6741 *errorp = EINVAL; 6742 return (NULL); 6743 } 6744 6745 if ((m->m_flags & M_PKTHDR) != 0) { 6746 m->m_pkthdr.len = 0; 6747 for (n = m; n; n = n->m_next) 6748 m->m_pkthdr.len += n->m_len; 6749 } 6750 6751 *errorp = 0; 6752 return (m); 6753 } 6754 6755 /* 6756 * SADB_DUMP processing 6757 * dump all entries including status of DEAD in SAD. 6758 * receive 6759 * <base> 6760 * from the ikmpd, and dump all secasvar leaves 6761 * and send, 6762 * <base> ..... 6763 * to the ikmpd. 6764 * 6765 * m will always be freed. 6766 */ 6767 static int 6768 key_dump(so, m0, mhp) 6769 struct socket *so; 6770 struct mbuf *m0; 6771 const struct sadb_msghdr *mhp; 6772 { 6773 u_int16_t proto; 6774 u_int8_t satype; 6775 struct mbuf *n; 6776 int s; 6777 int error, len, ok; 6778 6779 /* sanity check */ 6780 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 6781 panic("key_dump: NULL pointer is passed"); 6782 6783 /* map satype to proto */ 6784 satype = mhp->msg->sadb_msg_satype; 6785 if ((proto = key_satype2proto(satype)) == 0) { 6786 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 6787 return key_senderror(so, m0, EINVAL); 6788 } 6789 6790 /* 6791 * If the requestor has insufficient socket-buffer space 6792 * for the entire chain, nobody gets any response to the DUMP. 6793 * XXX For now, only the requestor ever gets anything. 6794 * Moreover, if the requestor has any space at all, they receive 6795 * the entire chain, otherwise the request is refused with ENOBUFS. 6796 */ 6797 if (sbspace(&so->so_rcv) <= 0) { 6798 return key_senderror(so, m0, ENOBUFS); 6799 } 6800 6801 s = splsoftnet(); 6802 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 6803 splx(s); 6804 6805 if (n == NULL) { 6806 return key_senderror(so, m0, ENOENT); 6807 } 6808 pfkeystat.in_total++; 6809 pfkeystat.in_bytes += len; 6810 6811 /* 6812 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 6813 * The requestor receives either the entire chain, or an 6814 * error message with ENOBUFS. 6815 * 6816 * sbappendaddrchain() takes the chain of entries, one 6817 * packet-record per SPD entry, prepends the key_src sockaddr 6818 * to each packet-record, links the sockaddr mbufs into a new 6819 * list of records, then appends the entire resulting 6820 * list to the requesting socket. 6821 */ 6822 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 6823 n, SB_PRIO_ONESHOT_OVERFLOW); 6824 6825 if (!ok) { 6826 pfkeystat.in_nomem++; 6827 m_freem(n); 6828 return key_senderror(so, m0, ENOBUFS); 6829 } 6830 6831 m_freem(m0); 6832 return 0; 6833 } 6834 6835 /* 6836 * SADB_X_PROMISC processing 6837 * 6838 * m will always be freed. 6839 */ 6840 static int 6841 key_promisc(so, m, mhp) 6842 struct socket *so; 6843 struct mbuf *m; 6844 const struct sadb_msghdr *mhp; 6845 { 6846 int olen; 6847 6848 /* sanity check */ 6849 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6850 panic("key_promisc: NULL pointer is passed"); 6851 6852 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6853 6854 if (olen < sizeof(struct sadb_msg)) { 6855 #if 1 6856 return key_senderror(so, m, EINVAL); 6857 #else 6858 m_freem(m); 6859 return 0; 6860 #endif 6861 } else if (olen == sizeof(struct sadb_msg)) { 6862 /* enable/disable promisc mode */ 6863 struct keycb *kp; 6864 6865 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6866 return key_senderror(so, m, EINVAL); 6867 mhp->msg->sadb_msg_errno = 0; 6868 switch (mhp->msg->sadb_msg_satype) { 6869 case 0: 6870 case 1: 6871 kp->kp_promisc = mhp->msg->sadb_msg_satype; 6872 break; 6873 default: 6874 return key_senderror(so, m, EINVAL); 6875 } 6876 6877 /* send the original message back to everyone */ 6878 mhp->msg->sadb_msg_errno = 0; 6879 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6880 } else { 6881 /* send packet as is */ 6882 6883 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6884 6885 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6886 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6887 } 6888 } 6889 6890 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6891 const struct sadb_msghdr *)) = { 6892 NULL, /* SADB_RESERVED */ 6893 key_getspi, /* SADB_GETSPI */ 6894 key_update, /* SADB_UPDATE */ 6895 key_add, /* SADB_ADD */ 6896 key_delete, /* SADB_DELETE */ 6897 key_get, /* SADB_GET */ 6898 key_acquire2, /* SADB_ACQUIRE */ 6899 key_register, /* SADB_REGISTER */ 6900 NULL, /* SADB_EXPIRE */ 6901 key_flush, /* SADB_FLUSH */ 6902 key_dump, /* SADB_DUMP */ 6903 key_promisc, /* SADB_X_PROMISC */ 6904 NULL, /* SADB_X_PCHANGE */ 6905 key_spdadd, /* SADB_X_SPDUPDATE */ 6906 key_spdadd, /* SADB_X_SPDADD */ 6907 key_spddelete, /* SADB_X_SPDDELETE */ 6908 key_spdget, /* SADB_X_SPDGET */ 6909 NULL, /* SADB_X_SPDACQUIRE */ 6910 key_spddump, /* SADB_X_SPDDUMP */ 6911 key_spdflush, /* SADB_X_SPDFLUSH */ 6912 key_spdadd, /* SADB_X_SPDSETIDX */ 6913 NULL, /* SADB_X_SPDEXPIRE */ 6914 key_spddelete2, /* SADB_X_SPDDELETE2 */ 6915 NULL, /* SADB_X_NAT_T_NEW_MAPPING */ 6916 }; 6917 6918 /* 6919 * parse sadb_msg buffer to process PFKEYv2, 6920 * and create a data to response if needed. 6921 * I think to be dealed with mbuf directly. 6922 * IN: 6923 * msgp : pointer to pointer to a received buffer pulluped. 6924 * This is rewrited to response. 6925 * so : pointer to socket. 6926 * OUT: 6927 * length for buffer to send to user process. 6928 */ 6929 int 6930 key_parse(m, so) 6931 struct mbuf *m; 6932 struct socket *so; 6933 { 6934 struct sadb_msg *msg; 6935 struct sadb_msghdr mh; 6936 u_int orglen; 6937 int error; 6938 int target; 6939 6940 /* sanity check */ 6941 if (m == NULL || so == NULL) 6942 panic("key_parse: NULL pointer is passed"); 6943 6944 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6945 KEYDEBUG(KEYDEBUG_KEY_DUMP, 6946 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 6947 kdebug_sadb(msg)); 6948 #endif 6949 6950 if (m->m_len < sizeof(struct sadb_msg)) { 6951 m = m_pullup(m, sizeof(struct sadb_msg)); 6952 if (!m) 6953 return ENOBUFS; 6954 } 6955 msg = mtod(m, struct sadb_msg *); 6956 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6957 target = KEY_SENDUP_ONE; 6958 6959 if ((m->m_flags & M_PKTHDR) == 0 || 6960 m->m_pkthdr.len != m->m_pkthdr.len) { 6961 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 6962 pfkeystat.out_invlen++; 6963 error = EINVAL; 6964 goto senderror; 6965 } 6966 6967 if (msg->sadb_msg_version != PF_KEY_V2) { 6968 ipseclog((LOG_DEBUG, 6969 "key_parse: PF_KEY version %u is mismatched.\n", 6970 msg->sadb_msg_version)); 6971 pfkeystat.out_invver++; 6972 error = EINVAL; 6973 goto senderror; 6974 } 6975 6976 if (msg->sadb_msg_type > SADB_MAX) { 6977 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6978 msg->sadb_msg_type)); 6979 pfkeystat.out_invmsgtype++; 6980 error = EINVAL; 6981 goto senderror; 6982 } 6983 6984 /* for old-fashioned code - should be nuked */ 6985 if (m->m_pkthdr.len > MCLBYTES) { 6986 m_freem(m); 6987 return ENOBUFS; 6988 } 6989 if (m->m_next) { 6990 struct mbuf *n; 6991 6992 MGETHDR(n, M_DONTWAIT, MT_DATA); 6993 if (n && m->m_pkthdr.len > MHLEN) { 6994 MCLGET(n, M_DONTWAIT); 6995 if ((n->m_flags & M_EXT) == 0) { 6996 m_free(n); 6997 n = NULL; 6998 } 6999 } 7000 if (!n) { 7001 m_freem(m); 7002 return ENOBUFS; 7003 } 7004 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7005 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7006 n->m_next = NULL; 7007 m_freem(m); 7008 m = n; 7009 } 7010 7011 /* align the mbuf chain so that extensions are in contiguous region. */ 7012 error = key_align(m, &mh); 7013 if (error) 7014 return error; 7015 7016 if (m->m_next) { /*XXX*/ 7017 m_freem(m); 7018 return ENOBUFS; 7019 } 7020 7021 msg = mh.msg; 7022 7023 /* check SA type */ 7024 switch (msg->sadb_msg_satype) { 7025 case SADB_SATYPE_UNSPEC: 7026 switch (msg->sadb_msg_type) { 7027 case SADB_GETSPI: 7028 case SADB_UPDATE: 7029 case SADB_ADD: 7030 case SADB_DELETE: 7031 case SADB_GET: 7032 case SADB_ACQUIRE: 7033 case SADB_EXPIRE: 7034 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7035 "when msg type=%u.\n", msg->sadb_msg_type)); 7036 pfkeystat.out_invsatype++; 7037 error = EINVAL; 7038 goto senderror; 7039 } 7040 break; 7041 case SADB_SATYPE_AH: 7042 case SADB_SATYPE_ESP: 7043 case SADB_X_SATYPE_IPCOMP: 7044 case SADB_X_SATYPE_TCPSIGNATURE: 7045 switch (msg->sadb_msg_type) { 7046 case SADB_X_SPDADD: 7047 case SADB_X_SPDDELETE: 7048 case SADB_X_SPDGET: 7049 case SADB_X_SPDDUMP: 7050 case SADB_X_SPDFLUSH: 7051 case SADB_X_SPDSETIDX: 7052 case SADB_X_SPDUPDATE: 7053 case SADB_X_SPDDELETE2: 7054 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7055 msg->sadb_msg_type)); 7056 pfkeystat.out_invsatype++; 7057 error = EINVAL; 7058 goto senderror; 7059 } 7060 break; 7061 case SADB_SATYPE_RSVP: 7062 case SADB_SATYPE_OSPFV2: 7063 case SADB_SATYPE_RIPV2: 7064 case SADB_SATYPE_MIP: 7065 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7066 msg->sadb_msg_satype)); 7067 pfkeystat.out_invsatype++; 7068 error = EOPNOTSUPP; 7069 goto senderror; 7070 case 1: /* XXX: What does it do? */ 7071 if (msg->sadb_msg_type == SADB_X_PROMISC) 7072 break; 7073 /*FALLTHROUGH*/ 7074 default: 7075 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7076 msg->sadb_msg_satype)); 7077 pfkeystat.out_invsatype++; 7078 error = EINVAL; 7079 goto senderror; 7080 } 7081 7082 /* check field of upper layer protocol and address family */ 7083 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7084 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7085 struct sadb_address *src0, *dst0; 7086 u_int plen; 7087 7088 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7089 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7090 7091 /* check upper layer protocol */ 7092 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7093 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7094 pfkeystat.out_invaddr++; 7095 error = EINVAL; 7096 goto senderror; 7097 } 7098 7099 /* check family */ 7100 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7101 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7102 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7103 pfkeystat.out_invaddr++; 7104 error = EINVAL; 7105 goto senderror; 7106 } 7107 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7108 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7109 ipseclog((LOG_DEBUG, 7110 "key_parse: address struct size mismatched.\n")); 7111 pfkeystat.out_invaddr++; 7112 error = EINVAL; 7113 goto senderror; 7114 } 7115 7116 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7117 case AF_INET: 7118 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7119 sizeof(struct sockaddr_in)) { 7120 pfkeystat.out_invaddr++; 7121 error = EINVAL; 7122 goto senderror; 7123 } 7124 break; 7125 case AF_INET6: 7126 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7127 sizeof(struct sockaddr_in6)) { 7128 pfkeystat.out_invaddr++; 7129 error = EINVAL; 7130 goto senderror; 7131 } 7132 break; 7133 default: 7134 ipseclog((LOG_DEBUG, 7135 "key_parse: unsupported address family.\n")); 7136 pfkeystat.out_invaddr++; 7137 error = EAFNOSUPPORT; 7138 goto senderror; 7139 } 7140 7141 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7142 case AF_INET: 7143 plen = sizeof(struct in_addr) << 3; 7144 break; 7145 case AF_INET6: 7146 plen = sizeof(struct in6_addr) << 3; 7147 break; 7148 default: 7149 plen = 0; /*fool gcc*/ 7150 break; 7151 } 7152 7153 /* check max prefix length */ 7154 if (src0->sadb_address_prefixlen > plen || 7155 dst0->sadb_address_prefixlen > plen) { 7156 ipseclog((LOG_DEBUG, 7157 "key_parse: illegal prefixlen.\n")); 7158 pfkeystat.out_invaddr++; 7159 error = EINVAL; 7160 goto senderror; 7161 } 7162 7163 /* 7164 * prefixlen == 0 is valid because there can be a case when 7165 * all addresses are matched. 7166 */ 7167 } 7168 7169 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7170 key_typesw[msg->sadb_msg_type] == NULL) { 7171 pfkeystat.out_invmsgtype++; 7172 error = EINVAL; 7173 goto senderror; 7174 } 7175 7176 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7177 7178 senderror: 7179 msg->sadb_msg_errno = error; 7180 return key_sendup_mbuf(so, m, target); 7181 } 7182 7183 static int 7184 key_senderror(so, m, code) 7185 struct socket *so; 7186 struct mbuf *m; 7187 int code; 7188 { 7189 struct sadb_msg *msg; 7190 7191 if (m->m_len < sizeof(struct sadb_msg)) 7192 panic("invalid mbuf passed to key_senderror"); 7193 7194 msg = mtod(m, struct sadb_msg *); 7195 msg->sadb_msg_errno = code; 7196 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7197 } 7198 7199 /* 7200 * set the pointer to each header into message buffer. 7201 * m will be freed on error. 7202 * XXX larger-than-MCLBYTES extension? 7203 */ 7204 static int 7205 key_align(m, mhp) 7206 struct mbuf *m; 7207 struct sadb_msghdr *mhp; 7208 { 7209 struct mbuf *n; 7210 struct sadb_ext *ext; 7211 size_t off, end; 7212 int extlen; 7213 int toff; 7214 7215 /* sanity check */ 7216 if (m == NULL || mhp == NULL) 7217 panic("key_align: NULL pointer is passed"); 7218 if (m->m_len < sizeof(struct sadb_msg)) 7219 panic("invalid mbuf passed to key_align"); 7220 7221 /* initialize */ 7222 bzero(mhp, sizeof(*mhp)); 7223 7224 mhp->msg = mtod(m, struct sadb_msg *); 7225 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7226 7227 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7228 extlen = end; /*just in case extlen is not updated*/ 7229 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7230 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7231 if (!n) { 7232 /* m is already freed */ 7233 return ENOBUFS; 7234 } 7235 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7236 7237 /* set pointer */ 7238 switch (ext->sadb_ext_type) { 7239 case SADB_EXT_SA: 7240 case SADB_EXT_ADDRESS_SRC: 7241 case SADB_EXT_ADDRESS_DST: 7242 case SADB_EXT_ADDRESS_PROXY: 7243 case SADB_EXT_LIFETIME_CURRENT: 7244 case SADB_EXT_LIFETIME_HARD: 7245 case SADB_EXT_LIFETIME_SOFT: 7246 case SADB_EXT_KEY_AUTH: 7247 case SADB_EXT_KEY_ENCRYPT: 7248 case SADB_EXT_IDENTITY_SRC: 7249 case SADB_EXT_IDENTITY_DST: 7250 case SADB_EXT_SENSITIVITY: 7251 case SADB_EXT_PROPOSAL: 7252 case SADB_EXT_SUPPORTED_AUTH: 7253 case SADB_EXT_SUPPORTED_ENCRYPT: 7254 case SADB_EXT_SPIRANGE: 7255 case SADB_X_EXT_POLICY: 7256 case SADB_X_EXT_SA2: 7257 /* duplicate check */ 7258 /* 7259 * XXX Are there duplication payloads of either 7260 * KEY_AUTH or KEY_ENCRYPT ? 7261 */ 7262 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7263 ipseclog((LOG_DEBUG, 7264 "key_align: duplicate ext_type %u " 7265 "is passed.\n", ext->sadb_ext_type)); 7266 m_freem(m); 7267 pfkeystat.out_dupext++; 7268 return EINVAL; 7269 } 7270 break; 7271 default: 7272 ipseclog((LOG_DEBUG, 7273 "key_align: invalid ext_type %u is passed.\n", 7274 ext->sadb_ext_type)); 7275 m_freem(m); 7276 pfkeystat.out_invexttype++; 7277 return EINVAL; 7278 } 7279 7280 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7281 7282 if (key_validate_ext(ext, extlen)) { 7283 m_freem(m); 7284 pfkeystat.out_invlen++; 7285 return EINVAL; 7286 } 7287 7288 n = m_pulldown(m, off, extlen, &toff); 7289 if (!n) { 7290 /* m is already freed */ 7291 return ENOBUFS; 7292 } 7293 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7294 7295 mhp->ext[ext->sadb_ext_type] = ext; 7296 mhp->extoff[ext->sadb_ext_type] = off; 7297 mhp->extlen[ext->sadb_ext_type] = extlen; 7298 } 7299 7300 if (off != end) { 7301 m_freem(m); 7302 pfkeystat.out_invlen++; 7303 return EINVAL; 7304 } 7305 7306 return 0; 7307 } 7308 7309 static int 7310 key_validate_ext(ext, len) 7311 const struct sadb_ext *ext; 7312 int len; 7313 { 7314 const struct sockaddr *sa; 7315 enum { NONE, ADDR } checktype = NONE; 7316 int baselen = 0; 7317 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7318 7319 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7320 return EINVAL; 7321 7322 /* if it does not match minimum/maximum length, bail */ 7323 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7324 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7325 return EINVAL; 7326 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7327 return EINVAL; 7328 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7329 return EINVAL; 7330 7331 /* more checks based on sadb_ext_type XXX need more */ 7332 switch (ext->sadb_ext_type) { 7333 case SADB_EXT_ADDRESS_SRC: 7334 case SADB_EXT_ADDRESS_DST: 7335 case SADB_EXT_ADDRESS_PROXY: 7336 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7337 checktype = ADDR; 7338 break; 7339 case SADB_EXT_IDENTITY_SRC: 7340 case SADB_EXT_IDENTITY_DST: 7341 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7342 SADB_X_IDENTTYPE_ADDR) { 7343 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7344 checktype = ADDR; 7345 } else 7346 checktype = NONE; 7347 break; 7348 default: 7349 checktype = NONE; 7350 break; 7351 } 7352 7353 switch (checktype) { 7354 case NONE: 7355 break; 7356 case ADDR: 7357 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7358 if (len < baselen + sal) 7359 return EINVAL; 7360 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7361 return EINVAL; 7362 break; 7363 } 7364 7365 return 0; 7366 } 7367 7368 void 7369 key_init() 7370 { 7371 int i; 7372 7373 callout_init(&key_timehandler_ch); 7374 7375 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7376 LIST_INIT(&sptree[i]); 7377 } 7378 7379 LIST_INIT(&sahtree); 7380 7381 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7382 LIST_INIT(®tree[i]); 7383 } 7384 7385 #ifndef IPSEC_NONBLOCK_ACQUIRE 7386 LIST_INIT(&acqtree); 7387 #endif 7388 LIST_INIT(&spacqtree); 7389 7390 /* system default */ 7391 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7392 ip4_def_policy.refcnt++; /*never reclaim this*/ 7393 7394 7395 #ifndef IPSEC_DEBUG2 7396 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7397 #endif /*IPSEC_DEBUG2*/ 7398 7399 /* initialize key statistics */ 7400 keystat.getspi_count = 1; 7401 7402 printf("IPsec: Initialized Security Association Processing.\n"); 7403 7404 return; 7405 } 7406 7407 /* 7408 * XXX: maybe This function is called after INBOUND IPsec processing. 7409 * 7410 * Special check for tunnel-mode packets. 7411 * We must make some checks for consistency between inner and outer IP header. 7412 * 7413 * xxx more checks to be provided 7414 */ 7415 int 7416 key_checktunnelsanity( 7417 struct secasvar *sav, 7418 u_int family, 7419 void *src, 7420 void *dst 7421 ) 7422 { 7423 /* sanity check */ 7424 if (sav->sah == NULL) 7425 panic("sav->sah == NULL at key_checktunnelsanity"); 7426 7427 /* XXX: check inner IP header */ 7428 7429 return 1; 7430 } 7431 7432 #if 0 7433 #define hostnamelen strlen(hostname) 7434 7435 /* 7436 * Get FQDN for the host. 7437 * If the administrator configured hostname (by hostname(1)) without 7438 * domain name, returns nothing. 7439 */ 7440 static const char * 7441 key_getfqdn() 7442 { 7443 int i; 7444 int hasdot; 7445 static char fqdn[MAXHOSTNAMELEN + 1]; 7446 7447 if (!hostnamelen) 7448 return NULL; 7449 7450 /* check if it comes with domain name. */ 7451 hasdot = 0; 7452 for (i = 0; i < hostnamelen; i++) { 7453 if (hostname[i] == '.') 7454 hasdot++; 7455 } 7456 if (!hasdot) 7457 return NULL; 7458 7459 /* NOTE: hostname may not be NUL-terminated. */ 7460 bzero(fqdn, sizeof(fqdn)); 7461 bcopy(hostname, fqdn, hostnamelen); 7462 fqdn[hostnamelen] = '\0'; 7463 return fqdn; 7464 } 7465 7466 /* 7467 * get username@FQDN for the host/user. 7468 */ 7469 static const char * 7470 key_getuserfqdn() 7471 { 7472 const char *host; 7473 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7474 struct proc *p = curproc; 7475 char *q; 7476 7477 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7478 return NULL; 7479 if (!(host = key_getfqdn())) 7480 return NULL; 7481 7482 /* NOTE: s_login may not be-NUL terminated. */ 7483 bzero(userfqdn, sizeof(userfqdn)); 7484 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7485 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7486 q = userfqdn + strlen(userfqdn); 7487 *q++ = '@'; 7488 bcopy(host, q, strlen(host)); 7489 q += strlen(host); 7490 *q++ = '\0'; 7491 7492 return userfqdn; 7493 } 7494 #endif 7495 7496 /* record data transfer on SA, and update timestamps */ 7497 void 7498 key_sa_recordxfer(sav, m) 7499 struct secasvar *sav; 7500 struct mbuf *m; 7501 { 7502 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7503 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7504 if (!sav->lft_c) 7505 return; 7506 7507 /* 7508 * XXX Currently, there is a difference of bytes size 7509 * between inbound and outbound processing. 7510 */ 7511 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7512 /* to check bytes lifetime is done in key_timehandler(). */ 7513 7514 /* 7515 * We use the number of packets as the unit of 7516 * sadb_lifetime_allocations. We increment the variable 7517 * whenever {esp,ah}_{in,out}put is called. 7518 */ 7519 sav->lft_c->sadb_lifetime_allocations++; 7520 /* XXX check for expires? */ 7521 7522 /* 7523 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7524 * in seconds. HARD and SOFT lifetime are measured by the time 7525 * difference (again in seconds) from sadb_lifetime_usetime. 7526 * 7527 * usetime 7528 * v expire expire 7529 * -----+-----+--------+---> t 7530 * <--------------> HARD 7531 * <-----> SOFT 7532 */ 7533 sav->lft_c->sadb_lifetime_usetime = time_second; 7534 /* XXX check for expires? */ 7535 7536 return; 7537 } 7538 7539 /* dumb version */ 7540 void 7541 key_sa_routechange(dst) 7542 struct sockaddr *dst; 7543 { 7544 struct secashead *sah; 7545 struct route *ro; 7546 7547 LIST_FOREACH(sah, &sahtree, chain) { 7548 ro = &sah->sa_route; 7549 if (dst->sa_len == rtcache_getdst(ro)->sa_len && 7550 memcmp(dst, rtcache_getdst(ro), dst->sa_len) == 0) 7551 rtcache_free(ro); 7552 } 7553 7554 return; 7555 } 7556 7557 static void 7558 key_sa_chgstate(sav, state) 7559 struct secasvar *sav; 7560 u_int8_t state; 7561 { 7562 if (sav == NULL) 7563 panic("key_sa_chgstate called with sav == NULL"); 7564 7565 if (sav->state == state) 7566 return; 7567 7568 if (__LIST_CHAINED(sav)) 7569 LIST_REMOVE(sav, chain); 7570 7571 sav->state = state; 7572 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7573 } 7574 7575 void 7576 key_sa_stir_iv(sav) 7577 struct secasvar *sav; 7578 { 7579 7580 if (!sav->iv) 7581 panic("key_sa_stir_iv called with sav == NULL"); 7582 key_randomfill(sav->iv, sav->ivlen); 7583 } 7584 7585 /* XXX too much? */ 7586 static struct mbuf * 7587 key_alloc_mbuf(l) 7588 int l; 7589 { 7590 struct mbuf *m = NULL, *n; 7591 int len, t; 7592 7593 len = l; 7594 while (len > 0) { 7595 MGET(n, M_DONTWAIT, MT_DATA); 7596 if (n && len > MLEN) 7597 MCLGET(n, M_DONTWAIT); 7598 if (!n) { 7599 m_freem(m); 7600 return NULL; 7601 } 7602 7603 n->m_next = NULL; 7604 n->m_len = 0; 7605 n->m_len = M_TRAILINGSPACE(n); 7606 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7607 if (n->m_len > len) { 7608 t = (n->m_len - len) & ~(sizeof(long) - 1); 7609 n->m_data += t; 7610 n->m_len = len; 7611 } 7612 7613 len -= n->m_len; 7614 7615 if (m) 7616 m_cat(m, n); 7617 else 7618 m = n; 7619 } 7620 7621 return m; 7622 } 7623 7624 static struct mbuf * 7625 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7626 { 7627 struct secashead *sah; 7628 struct secasvar *sav; 7629 u_int16_t proto; 7630 u_int stateidx; 7631 u_int8_t satype; 7632 u_int8_t state; 7633 int cnt; 7634 struct mbuf *m, *n; 7635 7636 /* map satype to proto */ 7637 if ((proto = key_satype2proto(req_satype)) == 0) { 7638 *errorp = EINVAL; 7639 return (NULL); 7640 } 7641 7642 /* count sav entries to be sent to the userland. */ 7643 cnt = 0; 7644 LIST_FOREACH(sah, &sahtree, chain) { 7645 if (req_satype != SADB_SATYPE_UNSPEC && 7646 proto != sah->saidx.proto) 7647 continue; 7648 7649 for (stateidx = 0; 7650 stateidx < _ARRAYLEN(saorder_state_any); 7651 stateidx++) { 7652 state = saorder_state_any[stateidx]; 7653 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7654 cnt++; 7655 } 7656 } 7657 } 7658 7659 if (cnt == 0) { 7660 *errorp = ENOENT; 7661 return (NULL); 7662 } 7663 7664 /* send this to the userland, one at a time. */ 7665 m = NULL; 7666 LIST_FOREACH(sah, &sahtree, chain) { 7667 if (req_satype != SADB_SATYPE_UNSPEC && 7668 proto != sah->saidx.proto) 7669 continue; 7670 7671 /* map proto to satype */ 7672 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7673 m_freem(m); 7674 *errorp = EINVAL; 7675 return (NULL); 7676 } 7677 7678 for (stateidx = 0; 7679 stateidx < _ARRAYLEN(saorder_state_any); 7680 stateidx++) { 7681 state = saorder_state_any[stateidx]; 7682 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7683 n = key_setdumpsa(sav, SADB_DUMP, satype, 7684 --cnt, pid); 7685 if (!n) { 7686 m_freem(m); 7687 *errorp = ENOBUFS; 7688 return (NULL); 7689 } 7690 7691 if (!m) 7692 m = n; 7693 else 7694 m_cat(m, n); 7695 } 7696 } 7697 } 7698 7699 if (!m) { 7700 *errorp = EINVAL; 7701 return (NULL); 7702 } 7703 7704 if ((m->m_flags & M_PKTHDR) != 0) { 7705 m->m_pkthdr.len = 0; 7706 for (n = m; n; n = n->m_next) 7707 m->m_pkthdr.len += n->m_len; 7708 } 7709 7710 *errorp = 0; 7711 return (m); 7712 } 7713 7714 static struct mbuf * 7715 key_setspddump(int *errorp, pid_t pid) 7716 { 7717 struct secpolicy *sp; 7718 int cnt; 7719 u_int dir; 7720 struct mbuf *m, *n; 7721 7722 /* search SPD entry and get buffer size. */ 7723 cnt = 0; 7724 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7725 LIST_FOREACH(sp, &sptree[dir], chain) { 7726 cnt++; 7727 } 7728 } 7729 7730 if (cnt == 0) { 7731 *errorp = ENOENT; 7732 return (NULL); 7733 } 7734 7735 m = NULL; 7736 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7737 LIST_FOREACH(sp, &sptree[dir], chain) { 7738 --cnt; 7739 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7740 7741 if (!n) { 7742 *errorp = ENOBUFS; 7743 m_freem(m); 7744 return (NULL); 7745 } 7746 if (!m) 7747 m = n; 7748 else { 7749 m->m_pkthdr.len += n->m_pkthdr.len; 7750 m_cat(m, n); 7751 } 7752 } 7753 } 7754 7755 *errorp = 0; 7756 return (m); 7757 } 7758 7759 static int 7760 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 7761 { 7762 struct mbuf *m, *n; 7763 int err2 = 0; 7764 char *p, *ep; 7765 size_t len; 7766 int s, error; 7767 7768 if (newp) 7769 return (EPERM); 7770 if (namelen != 1) 7771 return (EINVAL); 7772 7773 s = splsoftnet(); 7774 m = key_setdump(name[0], &error, l->l_proc->p_pid); 7775 splx(s); 7776 if (!m) 7777 return (error); 7778 if (!oldp) 7779 *oldlenp = m->m_pkthdr.len; 7780 else { 7781 p = oldp; 7782 if (*oldlenp < m->m_pkthdr.len) { 7783 err2 = ENOMEM; 7784 ep = p + *oldlenp; 7785 } else { 7786 *oldlenp = m->m_pkthdr.len; 7787 ep = p + m->m_pkthdr.len; 7788 } 7789 for (n = m; n; n = n->m_next) { 7790 len = (ep - p < n->m_len) ? 7791 ep - p : n->m_len; 7792 error = copyout(mtod(n, const void *), p, len); 7793 p += len; 7794 if (error) 7795 break; 7796 } 7797 if (error == 0) 7798 error = err2; 7799 } 7800 m_freem(m); 7801 7802 return (error); 7803 } 7804 7805 static int 7806 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 7807 { 7808 struct mbuf *m, *n; 7809 int err2 = 0; 7810 char *p, *ep; 7811 size_t len; 7812 int s, error; 7813 7814 if (newp) 7815 return (EPERM); 7816 if (namelen != 0) 7817 return (EINVAL); 7818 7819 s = splsoftnet(); 7820 m = key_setspddump(&error, l->l_proc->p_pid); 7821 splx(s); 7822 if (!m) 7823 return (error); 7824 if (!oldp) 7825 *oldlenp = m->m_pkthdr.len; 7826 else { 7827 p = oldp; 7828 if (*oldlenp < m->m_pkthdr.len) { 7829 err2 = ENOMEM; 7830 ep = p + *oldlenp; 7831 } else { 7832 *oldlenp = m->m_pkthdr.len; 7833 ep = p + m->m_pkthdr.len; 7834 } 7835 for (n = m; n; n = n->m_next) { 7836 len = (ep - p < n->m_len) ? 7837 ep - p : n->m_len; 7838 error = copyout(mtod(n, const void *), p, len); 7839 p += len; 7840 if (error) 7841 break; 7842 } 7843 if (error == 0) 7844 error = err2; 7845 } 7846 m_freem(m); 7847 7848 return (error); 7849 } 7850 7851 /* 7852 * Create sysctl tree for native FAST_IPSEC key knobs, originally 7853 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 7854 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 7855 * and in any case the part of our sysctl namespace used for dumping the 7856 * SPD and SA database *HAS* to be compatible with the KAME sysctl 7857 * namespace, for API reasons. 7858 * 7859 * Pending a consensus on the right way to fix this, add a level of 7860 * indirection in how we number the `native' FAST_IPSEC key nodes; 7861 * and (as requested by Andrew Brown) move registration of the 7862 * KAME-compatible names to a separate function. 7863 */ 7864 #if 0 7865 # define FAST_IPSEC_PFKEY PF_KEY_V2 7866 # define FAST_IPSEC_PFKEY_NAME "keyv2" 7867 #else 7868 # define FAST_IPSEC_PFKEY PF_KEY 7869 # define FAST_IPSEC_PFKEY_NAME "key" 7870 #endif 7871 7872 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 7873 { 7874 7875 sysctl_createv(clog, 0, NULL, NULL, 7876 CTLFLAG_PERMANENT, 7877 CTLTYPE_NODE, "net", NULL, 7878 NULL, 0, NULL, 0, 7879 CTL_NET, CTL_EOL); 7880 sysctl_createv(clog, 0, NULL, NULL, 7881 CTLFLAG_PERMANENT, 7882 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 7883 NULL, 0, NULL, 0, 7884 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 7885 7886 sysctl_createv(clog, 0, NULL, NULL, 7887 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7888 CTLTYPE_INT, "debug", NULL, 7889 NULL, 0, &key_debug_level, 0, 7890 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 7891 sysctl_createv(clog, 0, NULL, NULL, 7892 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7893 CTLTYPE_INT, "spi_try", NULL, 7894 NULL, 0, &key_spi_trycnt, 0, 7895 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 7896 sysctl_createv(clog, 0, NULL, NULL, 7897 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7898 CTLTYPE_INT, "spi_min_value", NULL, 7899 NULL, 0, &key_spi_minval, 0, 7900 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 7901 sysctl_createv(clog, 0, NULL, NULL, 7902 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7903 CTLTYPE_INT, "spi_max_value", NULL, 7904 NULL, 0, &key_spi_maxval, 0, 7905 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 7906 sysctl_createv(clog, 0, NULL, NULL, 7907 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7908 CTLTYPE_INT, "random_int", NULL, 7909 NULL, 0, &key_int_random, 0, 7910 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 7911 sysctl_createv(clog, 0, NULL, NULL, 7912 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7913 CTLTYPE_INT, "larval_lifetime", NULL, 7914 NULL, 0, &key_larval_lifetime, 0, 7915 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 7916 sysctl_createv(clog, 0, NULL, NULL, 7917 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7918 CTLTYPE_INT, "blockacq_count", NULL, 7919 NULL, 0, &key_blockacq_count, 0, 7920 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 7921 sysctl_createv(clog, 0, NULL, NULL, 7922 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7923 CTLTYPE_INT, "blockacq_lifetime", NULL, 7924 NULL, 0, &key_blockacq_lifetime, 0, 7925 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 7926 sysctl_createv(clog, 0, NULL, NULL, 7927 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7928 CTLTYPE_INT, "esp_keymin", NULL, 7929 NULL, 0, &ipsec_esp_keymin, 0, 7930 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 7931 sysctl_createv(clog, 0, NULL, NULL, 7932 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7933 CTLTYPE_INT, "prefered_oldsa", NULL, 7934 NULL, 0, &key_prefered_oldsa, 0, 7935 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 7936 sysctl_createv(clog, 0, NULL, NULL, 7937 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7938 CTLTYPE_INT, "esp_auth", NULL, 7939 NULL, 0, &ipsec_esp_auth, 0, 7940 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 7941 sysctl_createv(clog, 0, NULL, NULL, 7942 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7943 CTLTYPE_INT, "ah_keymin", NULL, 7944 NULL, 0, &ipsec_ah_keymin, 0, 7945 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 7946 } 7947 7948 /* 7949 * Register sysctl names used by setkey(8). For historical reasons, 7950 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 7951 * for both FAST_IPSEC and KAME IPSEC. 7952 */ 7953 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 7954 { 7955 7956 /* Make sure net.key exists before we register nodes underneath it. */ 7957 sysctl_createv(clog, 0, NULL, NULL, 7958 CTLFLAG_PERMANENT, 7959 CTLTYPE_NODE, "net", NULL, 7960 NULL, 0, NULL, 0, 7961 CTL_NET, CTL_EOL); 7962 sysctl_createv(clog, 0, NULL, NULL, 7963 CTLFLAG_PERMANENT, 7964 CTLTYPE_NODE, "key", NULL, 7965 NULL, 0, NULL, 0, 7966 CTL_NET, PF_KEY, CTL_EOL); 7967 7968 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 7969 sysctl_createv(clog, 0, NULL, NULL, 7970 CTLFLAG_PERMANENT, 7971 CTLTYPE_STRUCT, "dumpsa", NULL, 7972 sysctl_net_key_dumpsa, 0, NULL, 0, 7973 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 7974 sysctl_createv(clog, 0, NULL, NULL, 7975 CTLFLAG_PERMANENT, 7976 CTLTYPE_STRUCT, "dumpsp", NULL, 7977 sysctl_net_key_dumpsp, 0, NULL, 0, 7978 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 7979 } 7980
Indexes created Thu Sep 25 16:09:42 GMT 2025