key.c revision 1.42
1 /* $NetBSD: key.c,v 1.42 2007/03/09 00:40:39 liamjfoy 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 1.42 2007/03/09 00:40:39 liamjfoy 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 if (n != NULL) { 2267 m_freem(m); 2268 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2269 } else 2270 return key_senderror(so, m, ENOBUFS); 2271 } 2272 2273 /* 2274 * SADB_X_SPDACQUIRE processing. 2275 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2276 * send 2277 * <base, policy(*)> 2278 * to KMD, and expect to receive 2279 * <base> with SADB_X_SPDACQUIRE if error occurred, 2280 * or 2281 * <base, policy> 2282 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2283 * policy(*) is without policy requests. 2284 * 2285 * 0 : succeed 2286 * others: error number 2287 */ 2288 int 2289 key_spdacquire(sp) 2290 struct secpolicy *sp; 2291 { 2292 struct mbuf *result = NULL, *m; 2293 struct secspacq *newspacq; 2294 int error; 2295 2296 /* sanity check */ 2297 if (sp == NULL) 2298 panic("key_spdacquire: NULL pointer is passed"); 2299 if (sp->req != NULL) 2300 panic("key_spdacquire: called but there is request"); 2301 if (sp->policy != IPSEC_POLICY_IPSEC) 2302 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2303 2304 /* Get an entry to check whether sent message or not. */ 2305 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2306 if (key_blockacq_count < newspacq->count) { 2307 /* reset counter and do send message. */ 2308 newspacq->count = 0; 2309 } else { 2310 /* increment counter and do nothing. */ 2311 newspacq->count++; 2312 return 0; 2313 } 2314 } else { 2315 /* make new entry for blocking to send SADB_ACQUIRE. */ 2316 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2317 return ENOBUFS; 2318 2319 /* add to acqtree */ 2320 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2321 } 2322 2323 /* create new sadb_msg to reply. */ 2324 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2325 if (!m) { 2326 error = ENOBUFS; 2327 goto fail; 2328 } 2329 result = m; 2330 2331 result->m_pkthdr.len = 0; 2332 for (m = result; m; m = m->m_next) 2333 result->m_pkthdr.len += m->m_len; 2334 2335 mtod(result, struct sadb_msg *)->sadb_msg_len = 2336 PFKEY_UNIT64(result->m_pkthdr.len); 2337 2338 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2339 2340 fail: 2341 if (result) 2342 m_freem(result); 2343 return error; 2344 } 2345 2346 /* 2347 * SADB_SPDFLUSH processing 2348 * receive 2349 * <base> 2350 * from the user, and free all entries in secpctree. 2351 * and send, 2352 * <base> 2353 * to the user. 2354 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2355 * 2356 * m will always be freed. 2357 */ 2358 static int 2359 key_spdflush(so, m, mhp) 2360 struct socket *so; 2361 struct mbuf *m; 2362 const struct sadb_msghdr *mhp; 2363 { 2364 struct sadb_msg *newmsg; 2365 struct secpolicy *sp; 2366 u_int dir; 2367 2368 /* sanity check */ 2369 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2370 panic("key_spdflush: NULL pointer is passed"); 2371 2372 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2373 return key_senderror(so, m, EINVAL); 2374 2375 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2376 struct secpolicy * nextsp; 2377 for (sp = LIST_FIRST(&sptree[dir]); 2378 sp != NULL; 2379 sp = nextsp) { 2380 2381 nextsp = LIST_NEXT(sp, chain); 2382 if (sp->state == IPSEC_SPSTATE_DEAD) 2383 continue; 2384 key_sp_dead(sp); 2385 key_sp_unlink(sp); 2386 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2387 continue; 2388 } 2389 } 2390 2391 #if defined(__NetBSD__) 2392 /* Invalidate all cached SPD pointers in the PCBs. */ 2393 ipsec_invalpcbcacheall(); 2394 2395 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2396 #endif /* __NetBSD__ */ 2397 2398 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2399 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2400 return key_senderror(so, m, ENOBUFS); 2401 } 2402 2403 if (m->m_next) 2404 m_freem(m->m_next); 2405 m->m_next = NULL; 2406 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2407 newmsg = mtod(m, struct sadb_msg *); 2408 newmsg->sadb_msg_errno = 0; 2409 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2410 2411 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2412 } 2413 2414 static struct sockaddr key_src = { 2415 .sa_len = 2, 2416 .sa_family = PF_KEY, 2417 }; 2418 2419 static struct mbuf * 2420 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2421 { 2422 struct secpolicy *sp; 2423 int cnt; 2424 u_int dir; 2425 struct mbuf *m, *n, *prev; 2426 int totlen; 2427 2428 *lenp = 0; 2429 2430 /* search SPD entry and get buffer size. */ 2431 cnt = 0; 2432 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2433 LIST_FOREACH(sp, &sptree[dir], chain) { 2434 cnt++; 2435 } 2436 } 2437 2438 if (cnt == 0) { 2439 *errorp = ENOENT; 2440 return (NULL); 2441 } 2442 2443 m = NULL; 2444 prev = m; 2445 totlen = 0; 2446 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2447 LIST_FOREACH(sp, &sptree[dir], chain) { 2448 --cnt; 2449 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2450 2451 if (!n) { 2452 *errorp = ENOBUFS; 2453 if (m) m_freem(m); 2454 return (NULL); 2455 } 2456 2457 totlen += n->m_pkthdr.len; 2458 if (!m) { 2459 m = n; 2460 } else { 2461 prev->m_nextpkt = n; 2462 } 2463 prev = n; 2464 } 2465 } 2466 2467 *lenp = totlen; 2468 *errorp = 0; 2469 return (m); 2470 } 2471 2472 /* 2473 * SADB_SPDDUMP processing 2474 * receive 2475 * <base> 2476 * from the user, and dump all SP leaves 2477 * and send, 2478 * <base> ..... 2479 * to the ikmpd. 2480 * 2481 * m will always be freed. 2482 */ 2483 static int 2484 key_spddump(so, m0, mhp) 2485 struct socket *so; 2486 struct mbuf *m0; 2487 const struct sadb_msghdr *mhp; 2488 { 2489 struct mbuf *n; 2490 int error, len; 2491 int ok, s; 2492 pid_t pid; 2493 2494 /* sanity check */ 2495 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2496 panic("key_spddump: NULL pointer is passed"); 2497 2498 2499 pid = mhp->msg->sadb_msg_pid; 2500 /* 2501 * If the requestor has insufficient socket-buffer space 2502 * for the entire chain, nobody gets any response to the DUMP. 2503 * XXX For now, only the requestor ever gets anything. 2504 * Moreover, if the requestor has any space at all, they receive 2505 * the entire chain, otherwise the request is refused with ENOBUFS. 2506 */ 2507 if (sbspace(&so->so_rcv) <= 0) { 2508 return key_senderror(so, m0, ENOBUFS); 2509 } 2510 2511 s = splsoftnet(); 2512 n = key_setspddump_chain(&error, &len, pid); 2513 splx(s); 2514 2515 if (n == NULL) { 2516 return key_senderror(so, m0, ENOENT); 2517 } 2518 pfkeystat.in_total++; 2519 pfkeystat.in_bytes += len; 2520 2521 /* 2522 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2523 * The requestor receives either the entire chain, or an 2524 * error message with ENOBUFS. 2525 */ 2526 2527 /* 2528 * sbappendchainwith record takes the chain of entries, one 2529 * packet-record per SPD entry, prepends the key_src sockaddr 2530 * to each packet-record, links the sockaddr mbufs into a new 2531 * list of records, then appends the entire resulting 2532 * list to the requesting socket. 2533 */ 2534 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2535 n, SB_PRIO_ONESHOT_OVERFLOW); 2536 2537 if (!ok) { 2538 pfkeystat.in_nomem++; 2539 m_freem(n); 2540 return key_senderror(so, m0, ENOBUFS); 2541 } 2542 2543 m_freem(m0); 2544 return error; 2545 } 2546 2547 static struct mbuf * 2548 key_setdumpsp(sp, type, seq, pid) 2549 struct secpolicy *sp; 2550 u_int8_t type; 2551 u_int32_t seq; 2552 pid_t pid; 2553 { 2554 struct mbuf *result = NULL, *m; 2555 2556 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2557 if (!m) 2558 goto fail; 2559 result = m; 2560 2561 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2562 &sp->spidx.src.sa, sp->spidx.prefs, 2563 sp->spidx.ul_proto); 2564 if (!m) 2565 goto fail; 2566 m_cat(result, m); 2567 2568 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2569 &sp->spidx.dst.sa, sp->spidx.prefd, 2570 sp->spidx.ul_proto); 2571 if (!m) 2572 goto fail; 2573 m_cat(result, m); 2574 2575 m = key_sp2msg(sp); 2576 if (!m) 2577 goto fail; 2578 m_cat(result, m); 2579 2580 if ((result->m_flags & M_PKTHDR) == 0) 2581 goto fail; 2582 2583 if (result->m_len < sizeof(struct sadb_msg)) { 2584 result = m_pullup(result, sizeof(struct sadb_msg)); 2585 if (result == NULL) 2586 goto fail; 2587 } 2588 2589 result->m_pkthdr.len = 0; 2590 for (m = result; m; m = m->m_next) 2591 result->m_pkthdr.len += m->m_len; 2592 2593 mtod(result, struct sadb_msg *)->sadb_msg_len = 2594 PFKEY_UNIT64(result->m_pkthdr.len); 2595 2596 return result; 2597 2598 fail: 2599 m_freem(result); 2600 return NULL; 2601 } 2602 2603 /* 2604 * get PFKEY message length for security policy and request. 2605 */ 2606 static u_int 2607 key_getspreqmsglen(sp) 2608 struct secpolicy *sp; 2609 { 2610 u_int tlen; 2611 2612 tlen = sizeof(struct sadb_x_policy); 2613 2614 /* if is the policy for ipsec ? */ 2615 if (sp->policy != IPSEC_POLICY_IPSEC) 2616 return tlen; 2617 2618 /* get length of ipsec requests */ 2619 { 2620 struct ipsecrequest *isr; 2621 int len; 2622 2623 for (isr = sp->req; isr != NULL; isr = isr->next) { 2624 len = sizeof(struct sadb_x_ipsecrequest) 2625 + isr->saidx.src.sa.sa_len 2626 + isr->saidx.dst.sa.sa_len; 2627 2628 tlen += PFKEY_ALIGN8(len); 2629 } 2630 } 2631 2632 return tlen; 2633 } 2634 2635 /* 2636 * SADB_SPDEXPIRE processing 2637 * send 2638 * <base, address(SD), lifetime(CH), policy> 2639 * to KMD by PF_KEY. 2640 * 2641 * OUT: 0 : succeed 2642 * others : error number 2643 */ 2644 static int 2645 key_spdexpire(sp) 2646 struct secpolicy *sp; 2647 { 2648 int s; 2649 struct mbuf *result = NULL, *m; 2650 int len; 2651 int error = -1; 2652 struct sadb_lifetime *lt; 2653 2654 /* XXX: Why do we lock ? */ 2655 s = splsoftnet(); /*called from softclock()*/ 2656 2657 /* sanity check */ 2658 if (sp == NULL) 2659 panic("key_spdexpire: NULL pointer is passed"); 2660 2661 /* set msg header */ 2662 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2663 if (!m) { 2664 error = ENOBUFS; 2665 goto fail; 2666 } 2667 result = m; 2668 2669 /* create lifetime extension (current and hard) */ 2670 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2671 m = key_alloc_mbuf(len); 2672 if (!m || m->m_next) { /*XXX*/ 2673 if (m) 2674 m_freem(m); 2675 error = ENOBUFS; 2676 goto fail; 2677 } 2678 bzero(mtod(m, void *), len); 2679 lt = mtod(m, struct sadb_lifetime *); 2680 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2681 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2682 lt->sadb_lifetime_allocations = 0; 2683 lt->sadb_lifetime_bytes = 0; 2684 lt->sadb_lifetime_addtime = sp->created; 2685 lt->sadb_lifetime_usetime = sp->lastused; 2686 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2687 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2688 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2689 lt->sadb_lifetime_allocations = 0; 2690 lt->sadb_lifetime_bytes = 0; 2691 lt->sadb_lifetime_addtime = sp->lifetime; 2692 lt->sadb_lifetime_usetime = sp->validtime; 2693 m_cat(result, m); 2694 2695 /* set sadb_address for source */ 2696 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2697 &sp->spidx.src.sa, 2698 sp->spidx.prefs, sp->spidx.ul_proto); 2699 if (!m) { 2700 error = ENOBUFS; 2701 goto fail; 2702 } 2703 m_cat(result, m); 2704 2705 /* set sadb_address for destination */ 2706 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2707 &sp->spidx.dst.sa, 2708 sp->spidx.prefd, sp->spidx.ul_proto); 2709 if (!m) { 2710 error = ENOBUFS; 2711 goto fail; 2712 } 2713 m_cat(result, m); 2714 2715 /* set secpolicy */ 2716 m = key_sp2msg(sp); 2717 if (!m) { 2718 error = ENOBUFS; 2719 goto fail; 2720 } 2721 m_cat(result, m); 2722 2723 if ((result->m_flags & M_PKTHDR) == 0) { 2724 error = EINVAL; 2725 goto fail; 2726 } 2727 2728 if (result->m_len < sizeof(struct sadb_msg)) { 2729 result = m_pullup(result, sizeof(struct sadb_msg)); 2730 if (result == NULL) { 2731 error = ENOBUFS; 2732 goto fail; 2733 } 2734 } 2735 2736 result->m_pkthdr.len = 0; 2737 for (m = result; m; m = m->m_next) 2738 result->m_pkthdr.len += m->m_len; 2739 2740 mtod(result, struct sadb_msg *)->sadb_msg_len = 2741 PFKEY_UNIT64(result->m_pkthdr.len); 2742 2743 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2744 2745 fail: 2746 if (result) 2747 m_freem(result); 2748 splx(s); 2749 return error; 2750 } 2751 2752 /* %%% SAD management */ 2753 /* 2754 * allocating a memory for new SA head, and copy from the values of mhp. 2755 * OUT: NULL : failure due to the lack of memory. 2756 * others : pointer to new SA head. 2757 */ 2758 static struct secashead * 2759 key_newsah(saidx) 2760 struct secasindex *saidx; 2761 { 2762 struct secashead *newsah; 2763 2764 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2765 2766 newsah = (struct secashead *) 2767 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2768 if (newsah != NULL) { 2769 int i; 2770 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2771 LIST_INIT(&newsah->savtree[i]); 2772 newsah->saidx = *saidx; 2773 2774 /* add to saidxtree */ 2775 newsah->state = SADB_SASTATE_MATURE; 2776 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2777 } 2778 return(newsah); 2779 } 2780 2781 /* 2782 * delete SA index and all SA registerd. 2783 */ 2784 static void 2785 key_delsah(sah) 2786 struct secashead *sah; 2787 { 2788 struct secasvar *sav, *nextsav; 2789 u_int stateidx, state; 2790 int s; 2791 int zombie = 0; 2792 2793 /* sanity check */ 2794 if (sah == NULL) 2795 panic("key_delsah: NULL pointer is passed"); 2796 2797 s = splsoftnet(); /*called from softclock()*/ 2798 2799 /* searching all SA registerd in the secindex. */ 2800 for (stateidx = 0; 2801 stateidx < _ARRAYLEN(saorder_state_any); 2802 stateidx++) { 2803 2804 state = saorder_state_any[stateidx]; 2805 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2806 sav != NULL; 2807 sav = nextsav) { 2808 2809 nextsav = LIST_NEXT(sav, chain); 2810 2811 if (sav->refcnt == 0) { 2812 /* sanity check */ 2813 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2814 KEY_FREESAV(&sav); 2815 } else { 2816 /* give up to delete this sa */ 2817 zombie++; 2818 } 2819 } 2820 } 2821 2822 /* don't delete sah only if there are savs. */ 2823 if (zombie) { 2824 splx(s); 2825 return; 2826 } 2827 2828 rtcache_free(&sah->sa_route); 2829 2830 /* remove from tree of SA index */ 2831 if (__LIST_CHAINED(sah)) 2832 LIST_REMOVE(sah, chain); 2833 2834 KFREE(sah); 2835 2836 splx(s); 2837 return; 2838 } 2839 2840 /* 2841 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2842 * and copy the values of mhp into new buffer. 2843 * When SAD message type is GETSPI: 2844 * to set sequence number from acq_seq++, 2845 * to set zero to SPI. 2846 * not to call key_setsava(). 2847 * OUT: NULL : fail 2848 * others : pointer to new secasvar. 2849 * 2850 * does not modify mbuf. does not free mbuf on error. 2851 */ 2852 static struct secasvar * 2853 key_newsav(m, mhp, sah, errp, where, tag) 2854 struct mbuf *m; 2855 const struct sadb_msghdr *mhp; 2856 struct secashead *sah; 2857 int *errp; 2858 const char* where; 2859 int tag; 2860 { 2861 struct secasvar *newsav; 2862 const struct sadb_sa *xsa; 2863 2864 /* sanity check */ 2865 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2866 panic("key_newsa: NULL pointer is passed"); 2867 2868 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2869 if (newsav == NULL) { 2870 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2871 *errp = ENOBUFS; 2872 goto done; 2873 } 2874 bzero(newsav, sizeof(struct secasvar)); 2875 2876 switch (mhp->msg->sadb_msg_type) { 2877 case SADB_GETSPI: 2878 newsav->spi = 0; 2879 2880 #ifdef IPSEC_DOSEQCHECK 2881 /* sync sequence number */ 2882 if (mhp->msg->sadb_msg_seq == 0) 2883 newsav->seq = 2884 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2885 else 2886 #endif 2887 newsav->seq = mhp->msg->sadb_msg_seq; 2888 break; 2889 2890 case SADB_ADD: 2891 /* sanity check */ 2892 if (mhp->ext[SADB_EXT_SA] == NULL) { 2893 KFREE(newsav), newsav = NULL; 2894 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2895 *errp = EINVAL; 2896 goto done; 2897 } 2898 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2899 newsav->spi = xsa->sadb_sa_spi; 2900 newsav->seq = mhp->msg->sadb_msg_seq; 2901 break; 2902 default: 2903 KFREE(newsav), newsav = NULL; 2904 *errp = EINVAL; 2905 goto done; 2906 } 2907 2908 /* copy sav values */ 2909 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2910 *errp = key_setsaval(newsav, m, mhp); 2911 if (*errp) { 2912 KFREE(newsav), newsav = NULL; 2913 goto done; 2914 } 2915 } 2916 2917 /* reset created */ 2918 newsav->created = time_second; 2919 newsav->pid = mhp->msg->sadb_msg_pid; 2920 2921 /* add to satree */ 2922 newsav->sah = sah; 2923 newsav->refcnt = 1; 2924 newsav->state = SADB_SASTATE_LARVAL; 2925 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2926 secasvar, chain); 2927 done: 2928 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2929 printf("DP key_newsav from %s:%u return SP:%p\n", 2930 where, tag, newsav)); 2931 2932 return newsav; 2933 } 2934 2935 /* 2936 * free() SA variable entry. 2937 */ 2938 static void 2939 key_delsav(sav) 2940 struct secasvar *sav; 2941 { 2942 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 2943 IPSEC_ASSERT(sav->refcnt == 0, 2944 ("key_delsav: reference count %u > 0", sav->refcnt)); 2945 2946 /* remove from SA header */ 2947 if (__LIST_CHAINED(sav)) 2948 LIST_REMOVE(sav, chain); 2949 2950 /* 2951 * Cleanup xform state. Note that zeroize'ing causes the 2952 * keys to be cleared; otherwise we must do it ourself. 2953 */ 2954 if (sav->tdb_xform != NULL) { 2955 sav->tdb_xform->xf_zeroize(sav); 2956 sav->tdb_xform = NULL; 2957 } else { 2958 if (sav->key_auth != NULL) 2959 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 2960 if (sav->key_enc != NULL) 2961 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 2962 } 2963 if (sav->key_auth != NULL) { 2964 KFREE(sav->key_auth); 2965 sav->key_auth = NULL; 2966 } 2967 if (sav->key_enc != NULL) { 2968 KFREE(sav->key_enc); 2969 sav->key_enc = NULL; 2970 } 2971 if (sav->sched) { 2972 bzero(sav->sched, sav->schedlen); 2973 KFREE(sav->sched); 2974 sav->sched = NULL; 2975 } 2976 if (sav->replay != NULL) { 2977 KFREE(sav->replay); 2978 sav->replay = NULL; 2979 } 2980 if (sav->lft_c != NULL) { 2981 KFREE(sav->lft_c); 2982 sav->lft_c = NULL; 2983 } 2984 if (sav->lft_h != NULL) { 2985 KFREE(sav->lft_h); 2986 sav->lft_h = NULL; 2987 } 2988 if (sav->lft_s != NULL) { 2989 KFREE(sav->lft_s); 2990 sav->lft_s = NULL; 2991 } 2992 if (sav->iv != NULL) { 2993 KFREE(sav->iv); 2994 sav->iv = NULL; 2995 } 2996 2997 KFREE(sav); 2998 2999 return; 3000 } 3001 3002 /* 3003 * search SAD. 3004 * OUT: 3005 * NULL : not found 3006 * others : found, pointer to a SA. 3007 */ 3008 static struct secashead * 3009 key_getsah(saidx) 3010 struct secasindex *saidx; 3011 { 3012 struct secashead *sah; 3013 3014 LIST_FOREACH(sah, &sahtree, chain) { 3015 if (sah->state == SADB_SASTATE_DEAD) 3016 continue; 3017 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3018 return sah; 3019 } 3020 3021 return NULL; 3022 } 3023 3024 /* 3025 * check not to be duplicated SPI. 3026 * NOTE: this function is too slow due to searching all SAD. 3027 * OUT: 3028 * NULL : not found 3029 * others : found, pointer to a SA. 3030 */ 3031 static struct secasvar * 3032 key_checkspidup(saidx, spi) 3033 struct secasindex *saidx; 3034 u_int32_t spi; 3035 { 3036 struct secashead *sah; 3037 struct secasvar *sav; 3038 3039 /* check address family */ 3040 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3041 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3042 return NULL; 3043 } 3044 3045 /* check all SAD */ 3046 LIST_FOREACH(sah, &sahtree, chain) { 3047 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3048 continue; 3049 sav = key_getsavbyspi(sah, spi); 3050 if (sav != NULL) 3051 return sav; 3052 } 3053 3054 return NULL; 3055 } 3056 3057 /* 3058 * search SAD litmited alive SA, protocol, SPI. 3059 * OUT: 3060 * NULL : not found 3061 * others : found, pointer to a SA. 3062 */ 3063 static struct secasvar * 3064 key_getsavbyspi(sah, spi) 3065 struct secashead *sah; 3066 u_int32_t spi; 3067 { 3068 struct secasvar *sav; 3069 u_int stateidx, state; 3070 3071 /* search all status */ 3072 for (stateidx = 0; 3073 stateidx < _ARRAYLEN(saorder_state_alive); 3074 stateidx++) { 3075 3076 state = saorder_state_alive[stateidx]; 3077 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3078 3079 /* sanity check */ 3080 if (sav->state != state) { 3081 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3082 "invalid sav->state (queue: %d SA: %d)\n", 3083 state, sav->state)); 3084 continue; 3085 } 3086 3087 if (sav->spi == spi) 3088 return sav; 3089 } 3090 } 3091 3092 return NULL; 3093 } 3094 3095 /* 3096 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3097 * You must update these if need. 3098 * OUT: 0: success. 3099 * !0: failure. 3100 * 3101 * does not modify mbuf. does not free mbuf on error. 3102 */ 3103 static int 3104 key_setsaval(sav, m, mhp) 3105 struct secasvar *sav; 3106 struct mbuf *m; 3107 const struct sadb_msghdr *mhp; 3108 { 3109 int error = 0; 3110 3111 /* sanity check */ 3112 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3113 panic("key_setsaval: NULL pointer is passed"); 3114 3115 /* initialization */ 3116 sav->replay = NULL; 3117 sav->key_auth = NULL; 3118 sav->key_enc = NULL; 3119 sav->sched = NULL; 3120 sav->schedlen = 0; 3121 sav->iv = NULL; 3122 sav->lft_c = NULL; 3123 sav->lft_h = NULL; 3124 sav->lft_s = NULL; 3125 sav->tdb_xform = NULL; /* transform */ 3126 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3127 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3128 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3129 3130 /* SA */ 3131 if (mhp->ext[SADB_EXT_SA] != NULL) { 3132 const struct sadb_sa *sa0; 3133 3134 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3135 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3136 error = EINVAL; 3137 goto fail; 3138 } 3139 3140 sav->alg_auth = sa0->sadb_sa_auth; 3141 sav->alg_enc = sa0->sadb_sa_encrypt; 3142 sav->flags = sa0->sadb_sa_flags; 3143 3144 /* replay window */ 3145 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3146 sav->replay = (struct secreplay *) 3147 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3148 if (sav->replay == NULL) { 3149 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3150 error = ENOBUFS; 3151 goto fail; 3152 } 3153 if (sa0->sadb_sa_replay != 0) 3154 sav->replay->bitmap = (char*)(sav->replay+1); 3155 sav->replay->wsize = sa0->sadb_sa_replay; 3156 } 3157 } 3158 3159 /* Authentication keys */ 3160 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3161 const struct sadb_key *key0; 3162 int len; 3163 3164 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3165 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3166 3167 error = 0; 3168 if (len < sizeof(*key0)) { 3169 error = EINVAL; 3170 goto fail; 3171 } 3172 switch (mhp->msg->sadb_msg_satype) { 3173 case SADB_SATYPE_AH: 3174 case SADB_SATYPE_ESP: 3175 case SADB_X_SATYPE_TCPSIGNATURE: 3176 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3177 sav->alg_auth != SADB_X_AALG_NULL) 3178 error = EINVAL; 3179 break; 3180 case SADB_X_SATYPE_IPCOMP: 3181 default: 3182 error = EINVAL; 3183 break; 3184 } 3185 if (error) { 3186 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3187 goto fail; 3188 } 3189 3190 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3191 if (sav->key_auth == NULL) { 3192 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3193 error = ENOBUFS; 3194 goto fail; 3195 } 3196 } 3197 3198 /* Encryption key */ 3199 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3200 const struct sadb_key *key0; 3201 int len; 3202 3203 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3204 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3205 3206 error = 0; 3207 if (len < sizeof(*key0)) { 3208 error = EINVAL; 3209 goto fail; 3210 } 3211 switch (mhp->msg->sadb_msg_satype) { 3212 case SADB_SATYPE_ESP: 3213 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3214 sav->alg_enc != SADB_EALG_NULL) { 3215 error = EINVAL; 3216 break; 3217 } 3218 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3219 if (sav->key_enc == NULL) { 3220 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3221 error = ENOBUFS; 3222 goto fail; 3223 } 3224 break; 3225 case SADB_X_SATYPE_IPCOMP: 3226 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3227 error = EINVAL; 3228 sav->key_enc = NULL; /*just in case*/ 3229 break; 3230 case SADB_SATYPE_AH: 3231 case SADB_X_SATYPE_TCPSIGNATURE: 3232 default: 3233 error = EINVAL; 3234 break; 3235 } 3236 if (error) { 3237 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3238 goto fail; 3239 } 3240 } 3241 3242 /* set iv */ 3243 sav->ivlen = 0; 3244 3245 switch (mhp->msg->sadb_msg_satype) { 3246 case SADB_SATYPE_AH: 3247 error = xform_init(sav, XF_AH); 3248 break; 3249 case SADB_SATYPE_ESP: 3250 error = xform_init(sav, XF_ESP); 3251 break; 3252 case SADB_X_SATYPE_IPCOMP: 3253 error = xform_init(sav, XF_IPCOMP); 3254 break; 3255 case SADB_X_SATYPE_TCPSIGNATURE: 3256 error = xform_init(sav, XF_TCPSIGNATURE); 3257 break; 3258 } 3259 if (error) { 3260 ipseclog((LOG_DEBUG, 3261 "key_setsaval: unable to initialize SA type %u.\n", 3262 mhp->msg->sadb_msg_satype)); 3263 goto fail; 3264 } 3265 3266 /* reset created */ 3267 sav->created = time_second; 3268 3269 /* make lifetime for CURRENT */ 3270 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3271 sizeof(struct sadb_lifetime)); 3272 if (sav->lft_c == NULL) { 3273 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3274 error = ENOBUFS; 3275 goto fail; 3276 } 3277 3278 sav->lft_c->sadb_lifetime_len = 3279 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3280 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3281 sav->lft_c->sadb_lifetime_allocations = 0; 3282 sav->lft_c->sadb_lifetime_bytes = 0; 3283 sav->lft_c->sadb_lifetime_addtime = time_second; 3284 sav->lft_c->sadb_lifetime_usetime = 0; 3285 3286 /* lifetimes for HARD and SOFT */ 3287 { 3288 const struct sadb_lifetime *lft0; 3289 3290 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3291 if (lft0 != NULL) { 3292 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3293 error = EINVAL; 3294 goto fail; 3295 } 3296 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3297 sizeof(*lft0)); 3298 if (sav->lft_h == NULL) { 3299 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3300 error = ENOBUFS; 3301 goto fail; 3302 } 3303 /* to be initialize ? */ 3304 } 3305 3306 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3307 if (lft0 != NULL) { 3308 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3309 error = EINVAL; 3310 goto fail; 3311 } 3312 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3313 sizeof(*lft0)); 3314 if (sav->lft_s == NULL) { 3315 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3316 error = ENOBUFS; 3317 goto fail; 3318 } 3319 /* to be initialize ? */ 3320 } 3321 } 3322 3323 return 0; 3324 3325 fail: 3326 /* initialization */ 3327 if (sav->replay != NULL) { 3328 KFREE(sav->replay); 3329 sav->replay = NULL; 3330 } 3331 if (sav->key_auth != NULL) { 3332 KFREE(sav->key_auth); 3333 sav->key_auth = NULL; 3334 } 3335 if (sav->key_enc != NULL) { 3336 KFREE(sav->key_enc); 3337 sav->key_enc = NULL; 3338 } 3339 if (sav->sched) { 3340 KFREE(sav->sched); 3341 sav->sched = NULL; 3342 } 3343 if (sav->iv != NULL) { 3344 KFREE(sav->iv); 3345 sav->iv = NULL; 3346 } 3347 if (sav->lft_c != NULL) { 3348 KFREE(sav->lft_c); 3349 sav->lft_c = NULL; 3350 } 3351 if (sav->lft_h != NULL) { 3352 KFREE(sav->lft_h); 3353 sav->lft_h = NULL; 3354 } 3355 if (sav->lft_s != NULL) { 3356 KFREE(sav->lft_s); 3357 sav->lft_s = NULL; 3358 } 3359 3360 return error; 3361 } 3362 3363 /* 3364 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3365 * OUT: 0: valid 3366 * other: errno 3367 */ 3368 static int 3369 key_mature(sav) 3370 struct secasvar *sav; 3371 { 3372 int error; 3373 3374 /* check SPI value */ 3375 switch (sav->sah->saidx.proto) { 3376 case IPPROTO_ESP: 3377 case IPPROTO_AH: 3378 if (ntohl(sav->spi) <= 255) { 3379 ipseclog((LOG_DEBUG, 3380 "key_mature: illegal range of SPI %u.\n", 3381 (u_int32_t)ntohl(sav->spi))); 3382 return EINVAL; 3383 } 3384 break; 3385 } 3386 3387 /* check satype */ 3388 switch (sav->sah->saidx.proto) { 3389 case IPPROTO_ESP: 3390 /* check flags */ 3391 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3392 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3393 ipseclog((LOG_DEBUG, "key_mature: " 3394 "invalid flag (derived) given to old-esp.\n")); 3395 return EINVAL; 3396 } 3397 error = xform_init(sav, XF_ESP); 3398 break; 3399 case IPPROTO_AH: 3400 /* check flags */ 3401 if (sav->flags & SADB_X_EXT_DERIV) { 3402 ipseclog((LOG_DEBUG, "key_mature: " 3403 "invalid flag (derived) given to AH SA.\n")); 3404 return EINVAL; 3405 } 3406 if (sav->alg_enc != SADB_EALG_NONE) { 3407 ipseclog((LOG_DEBUG, "key_mature: " 3408 "protocol and algorithm mismated.\n")); 3409 return(EINVAL); 3410 } 3411 error = xform_init(sav, XF_AH); 3412 break; 3413 case IPPROTO_IPCOMP: 3414 if (sav->alg_auth != SADB_AALG_NONE) { 3415 ipseclog((LOG_DEBUG, "key_mature: " 3416 "protocol and algorithm mismated.\n")); 3417 return(EINVAL); 3418 } 3419 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3420 && ntohl(sav->spi) >= 0x10000) { 3421 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3422 return(EINVAL); 3423 } 3424 error = xform_init(sav, XF_IPCOMP); 3425 break; 3426 case IPPROTO_TCP: 3427 if (sav->alg_enc != SADB_EALG_NONE) { 3428 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3429 "mismated.\n", __func__)); 3430 return(EINVAL); 3431 } 3432 error = xform_init(sav, XF_TCPSIGNATURE); 3433 break; 3434 default: 3435 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3436 error = EPROTONOSUPPORT; 3437 break; 3438 } 3439 if (error == 0) 3440 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3441 return (error); 3442 } 3443 3444 /* 3445 * subroutine for SADB_GET and SADB_DUMP. 3446 */ 3447 static struct mbuf * 3448 key_setdumpsa(sav, type, satype, seq, pid) 3449 struct secasvar *sav; 3450 u_int8_t type, satype; 3451 u_int32_t seq, pid; 3452 { 3453 struct mbuf *result = NULL, *tres = NULL, *m; 3454 int l = 0; 3455 int i; 3456 void *p; 3457 int dumporder[] = { 3458 SADB_EXT_SA, SADB_X_EXT_SA2, 3459 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3460 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3461 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3462 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3463 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3464 }; 3465 3466 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3467 if (m == NULL) 3468 goto fail; 3469 result = m; 3470 3471 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3472 m = NULL; 3473 p = NULL; 3474 switch (dumporder[i]) { 3475 case SADB_EXT_SA: 3476 m = key_setsadbsa(sav); 3477 if (!m) 3478 goto fail; 3479 break; 3480 3481 case SADB_X_EXT_SA2: 3482 m = key_setsadbxsa2(sav->sah->saidx.mode, 3483 sav->replay ? sav->replay->count : 0, 3484 sav->sah->saidx.reqid); 3485 if (!m) 3486 goto fail; 3487 break; 3488 3489 case SADB_EXT_ADDRESS_SRC: 3490 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3491 &sav->sah->saidx.src.sa, 3492 FULLMASK, IPSEC_ULPROTO_ANY); 3493 if (!m) 3494 goto fail; 3495 break; 3496 3497 case SADB_EXT_ADDRESS_DST: 3498 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3499 &sav->sah->saidx.dst.sa, 3500 FULLMASK, IPSEC_ULPROTO_ANY); 3501 if (!m) 3502 goto fail; 3503 break; 3504 3505 case SADB_EXT_KEY_AUTH: 3506 if (!sav->key_auth) 3507 continue; 3508 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3509 p = sav->key_auth; 3510 break; 3511 3512 case SADB_EXT_KEY_ENCRYPT: 3513 if (!sav->key_enc) 3514 continue; 3515 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3516 p = sav->key_enc; 3517 break; 3518 3519 case SADB_EXT_LIFETIME_CURRENT: 3520 if (!sav->lft_c) 3521 continue; 3522 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3523 p = sav->lft_c; 3524 break; 3525 3526 case SADB_EXT_LIFETIME_HARD: 3527 if (!sav->lft_h) 3528 continue; 3529 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3530 p = sav->lft_h; 3531 break; 3532 3533 case SADB_EXT_LIFETIME_SOFT: 3534 if (!sav->lft_s) 3535 continue; 3536 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3537 p = sav->lft_s; 3538 break; 3539 3540 case SADB_EXT_ADDRESS_PROXY: 3541 case SADB_EXT_IDENTITY_SRC: 3542 case SADB_EXT_IDENTITY_DST: 3543 /* XXX: should we brought from SPD ? */ 3544 case SADB_EXT_SENSITIVITY: 3545 default: 3546 continue; 3547 } 3548 3549 if ((!m && !p) || (m && p)) 3550 goto fail; 3551 if (p && tres) { 3552 M_PREPEND(tres, l, M_DONTWAIT); 3553 if (!tres) 3554 goto fail; 3555 bcopy(p, mtod(tres, void *), l); 3556 continue; 3557 } 3558 if (p) { 3559 m = key_alloc_mbuf(l); 3560 if (!m) 3561 goto fail; 3562 m_copyback(m, 0, l, p); 3563 } 3564 3565 if (tres) 3566 m_cat(m, tres); 3567 tres = m; 3568 } 3569 3570 m_cat(result, tres); 3571 3572 if (result->m_len < sizeof(struct sadb_msg)) { 3573 result = m_pullup(result, sizeof(struct sadb_msg)); 3574 if (result == NULL) 3575 goto fail; 3576 } 3577 3578 result->m_pkthdr.len = 0; 3579 for (m = result; m; m = m->m_next) 3580 result->m_pkthdr.len += m->m_len; 3581 3582 mtod(result, struct sadb_msg *)->sadb_msg_len = 3583 PFKEY_UNIT64(result->m_pkthdr.len); 3584 3585 return result; 3586 3587 fail: 3588 m_freem(result); 3589 m_freem(tres); 3590 return NULL; 3591 } 3592 3593 /* 3594 * set data into sadb_msg. 3595 */ 3596 static struct mbuf * 3597 key_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3598 u_int8_t type, satype; 3599 u_int16_t tlen; 3600 u_int32_t seq; 3601 pid_t pid; 3602 u_int16_t reserved; 3603 { 3604 struct mbuf *m; 3605 struct sadb_msg *p; 3606 int len; 3607 3608 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3609 if (len > MCLBYTES) 3610 return NULL; 3611 MGETHDR(m, M_DONTWAIT, MT_DATA); 3612 if (m && len > MHLEN) { 3613 MCLGET(m, M_DONTWAIT); 3614 if ((m->m_flags & M_EXT) == 0) { 3615 m_freem(m); 3616 m = NULL; 3617 } 3618 } 3619 if (!m) 3620 return NULL; 3621 m->m_pkthdr.len = m->m_len = len; 3622 m->m_next = NULL; 3623 3624 p = mtod(m, struct sadb_msg *); 3625 3626 bzero(p, len); 3627 p->sadb_msg_version = PF_KEY_V2; 3628 p->sadb_msg_type = type; 3629 p->sadb_msg_errno = 0; 3630 p->sadb_msg_satype = satype; 3631 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3632 p->sadb_msg_reserved = reserved; 3633 p->sadb_msg_seq = seq; 3634 p->sadb_msg_pid = (u_int32_t)pid; 3635 3636 return m; 3637 } 3638 3639 /* 3640 * copy secasvar data into sadb_address. 3641 */ 3642 static struct mbuf * 3643 key_setsadbsa(sav) 3644 struct secasvar *sav; 3645 { 3646 struct mbuf *m; 3647 struct sadb_sa *p; 3648 int len; 3649 3650 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3651 m = key_alloc_mbuf(len); 3652 if (!m || m->m_next) { /*XXX*/ 3653 if (m) 3654 m_freem(m); 3655 return NULL; 3656 } 3657 3658 p = mtod(m, struct sadb_sa *); 3659 3660 bzero(p, len); 3661 p->sadb_sa_len = PFKEY_UNIT64(len); 3662 p->sadb_sa_exttype = SADB_EXT_SA; 3663 p->sadb_sa_spi = sav->spi; 3664 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3665 p->sadb_sa_state = sav->state; 3666 p->sadb_sa_auth = sav->alg_auth; 3667 p->sadb_sa_encrypt = sav->alg_enc; 3668 p->sadb_sa_flags = sav->flags; 3669 3670 return m; 3671 } 3672 3673 /* 3674 * set data into sadb_address. 3675 */ 3676 static struct mbuf * 3677 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3678 u_int16_t exttype; 3679 const struct sockaddr *saddr; 3680 u_int8_t prefixlen; 3681 u_int16_t ul_proto; 3682 { 3683 struct mbuf *m; 3684 struct sadb_address *p; 3685 size_t len; 3686 3687 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3688 PFKEY_ALIGN8(saddr->sa_len); 3689 m = key_alloc_mbuf(len); 3690 if (!m || m->m_next) { /*XXX*/ 3691 if (m) 3692 m_freem(m); 3693 return NULL; 3694 } 3695 3696 p = mtod(m, struct sadb_address *); 3697 3698 bzero(p, len); 3699 p->sadb_address_len = PFKEY_UNIT64(len); 3700 p->sadb_address_exttype = exttype; 3701 p->sadb_address_proto = ul_proto; 3702 if (prefixlen == FULLMASK) { 3703 switch (saddr->sa_family) { 3704 case AF_INET: 3705 prefixlen = sizeof(struct in_addr) << 3; 3706 break; 3707 case AF_INET6: 3708 prefixlen = sizeof(struct in6_addr) << 3; 3709 break; 3710 default: 3711 ; /*XXX*/ 3712 } 3713 } 3714 p->sadb_address_prefixlen = prefixlen; 3715 p->sadb_address_reserved = 0; 3716 3717 bcopy(saddr, 3718 mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3719 saddr->sa_len); 3720 3721 return m; 3722 } 3723 3724 #if 0 3725 /* 3726 * set data into sadb_ident. 3727 */ 3728 static struct mbuf * 3729 key_setsadbident(exttype, idtype, string, stringlen, id) 3730 u_int16_t exttype, idtype; 3731 void *string; 3732 int stringlen; 3733 u_int64_t id; 3734 { 3735 struct mbuf *m; 3736 struct sadb_ident *p; 3737 size_t len; 3738 3739 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3740 m = key_alloc_mbuf(len); 3741 if (!m || m->m_next) { /*XXX*/ 3742 if (m) 3743 m_freem(m); 3744 return NULL; 3745 } 3746 3747 p = mtod(m, struct sadb_ident *); 3748 3749 bzero(p, len); 3750 p->sadb_ident_len = PFKEY_UNIT64(len); 3751 p->sadb_ident_exttype = exttype; 3752 p->sadb_ident_type = idtype; 3753 p->sadb_ident_reserved = 0; 3754 p->sadb_ident_id = id; 3755 3756 bcopy(string, 3757 mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3758 stringlen); 3759 3760 return m; 3761 } 3762 #endif 3763 3764 /* 3765 * set data into sadb_x_sa2. 3766 */ 3767 static struct mbuf * 3768 key_setsadbxsa2(mode, seq, reqid) 3769 u_int8_t mode; 3770 u_int32_t seq; 3771 u_int16_t reqid; 3772 { 3773 struct mbuf *m; 3774 struct sadb_x_sa2 *p; 3775 size_t len; 3776 3777 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3778 m = key_alloc_mbuf(len); 3779 if (!m || m->m_next) { /*XXX*/ 3780 if (m) 3781 m_freem(m); 3782 return NULL; 3783 } 3784 3785 p = mtod(m, struct sadb_x_sa2 *); 3786 3787 bzero(p, len); 3788 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3789 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3790 p->sadb_x_sa2_mode = mode; 3791 p->sadb_x_sa2_reserved1 = 0; 3792 p->sadb_x_sa2_reserved2 = 0; 3793 p->sadb_x_sa2_sequence = seq; 3794 p->sadb_x_sa2_reqid = reqid; 3795 3796 return m; 3797 } 3798 3799 /* 3800 * set data into sadb_x_policy 3801 */ 3802 static struct mbuf * 3803 key_setsadbxpolicy(type, dir, id) 3804 u_int16_t type; 3805 u_int8_t dir; 3806 u_int32_t id; 3807 { 3808 struct mbuf *m; 3809 struct sadb_x_policy *p; 3810 size_t len; 3811 3812 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3813 m = key_alloc_mbuf(len); 3814 if (!m || m->m_next) { /*XXX*/ 3815 if (m) 3816 m_freem(m); 3817 return NULL; 3818 } 3819 3820 p = mtod(m, struct sadb_x_policy *); 3821 3822 bzero(p, len); 3823 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3824 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3825 p->sadb_x_policy_type = type; 3826 p->sadb_x_policy_dir = dir; 3827 p->sadb_x_policy_id = id; 3828 3829 return m; 3830 } 3831 3832 /* %%% utilities */ 3833 /* 3834 * copy a buffer into the new buffer allocated. 3835 */ 3836 static void * 3837 key_newbuf(src, len) 3838 const void *src; 3839 u_int len; 3840 { 3841 void *new; 3842 3843 KMALLOC(new, void *, len); 3844 if (new == NULL) { 3845 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 3846 return NULL; 3847 } 3848 bcopy(src, new, len); 3849 3850 return new; 3851 } 3852 3853 /* compare my own address 3854 * OUT: 1: true, i.e. my address. 3855 * 0: false 3856 */ 3857 int 3858 key_ismyaddr(sa) 3859 struct sockaddr *sa; 3860 { 3861 #ifdef INET 3862 struct sockaddr_in *sin; 3863 struct in_ifaddr *ia; 3864 #endif 3865 3866 /* sanity check */ 3867 if (sa == NULL) 3868 panic("key_ismyaddr: NULL pointer is passed"); 3869 3870 switch (sa->sa_family) { 3871 #ifdef INET 3872 case AF_INET: 3873 sin = (struct sockaddr_in *)sa; 3874 for (ia = in_ifaddrhead.tqh_first; ia; 3875 ia = ia->ia_link.tqe_next) 3876 { 3877 if (sin->sin_family == ia->ia_addr.sin_family && 3878 sin->sin_len == ia->ia_addr.sin_len && 3879 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3880 { 3881 return 1; 3882 } 3883 } 3884 break; 3885 #endif 3886 #ifdef INET6 3887 case AF_INET6: 3888 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3889 #endif 3890 } 3891 3892 return 0; 3893 } 3894 3895 #ifdef INET6 3896 /* 3897 * compare my own address for IPv6. 3898 * 1: ours 3899 * 0: other 3900 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3901 */ 3902 #include <netinet6/in6_var.h> 3903 3904 static int 3905 key_ismyaddr6(sin6) 3906 struct sockaddr_in6 *sin6; 3907 { 3908 struct in6_ifaddr *ia; 3909 struct in6_multi *in6m; 3910 3911 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 3912 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3913 (struct sockaddr *)&ia->ia_addr, 0) == 0) 3914 return 1; 3915 3916 /* 3917 * XXX Multicast 3918 * XXX why do we care about multlicast here while we don't care 3919 * about IPv4 multicast?? 3920 * XXX scope 3921 */ 3922 in6m = NULL; 3923 #ifdef __FreeBSD__ 3924 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3925 #else 3926 for ((in6m) = ia->ia6_multiaddrs.lh_first; 3927 (in6m) != NULL && 3928 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 3929 (in6m) = in6m->in6m_entry.le_next) 3930 continue; 3931 #endif 3932 if (in6m) 3933 return 1; 3934 } 3935 3936 /* loopback, just for safety */ 3937 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3938 return 1; 3939 3940 return 0; 3941 } 3942 #endif /*INET6*/ 3943 3944 /* 3945 * compare two secasindex structure. 3946 * flag can specify to compare 2 saidxes. 3947 * compare two secasindex structure without both mode and reqid. 3948 * don't compare port. 3949 * IN: 3950 * saidx0: source, it can be in SAD. 3951 * saidx1: object. 3952 * OUT: 3953 * 1 : equal 3954 * 0 : not equal 3955 */ 3956 static int 3957 key_cmpsaidx( 3958 const struct secasindex *saidx0, 3959 const struct secasindex *saidx1, 3960 int flag) 3961 { 3962 /* sanity */ 3963 if (saidx0 == NULL && saidx1 == NULL) 3964 return 1; 3965 3966 if (saidx0 == NULL || saidx1 == NULL) 3967 return 0; 3968 3969 if (saidx0->proto != saidx1->proto) 3970 return 0; 3971 3972 if (flag == CMP_EXACTLY) { 3973 if (saidx0->mode != saidx1->mode) 3974 return 0; 3975 if (saidx0->reqid != saidx1->reqid) 3976 return 0; 3977 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3978 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3979 return 0; 3980 } else { 3981 3982 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3983 if (flag == CMP_MODE_REQID 3984 ||flag == CMP_REQID) { 3985 /* 3986 * If reqid of SPD is non-zero, unique SA is required. 3987 * The result must be of same reqid in this case. 3988 */ 3989 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3990 return 0; 3991 } 3992 3993 if (flag == CMP_MODE_REQID) { 3994 if (saidx0->mode != IPSEC_MODE_ANY 3995 && saidx0->mode != saidx1->mode) 3996 return 0; 3997 } 3998 3999 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 4000 return 0; 4001 } 4002 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 4003 return 0; 4004 } 4005 } 4006 4007 return 1; 4008 } 4009 4010 /* 4011 * compare two secindex structure exactly. 4012 * IN: 4013 * spidx0: source, it is often in SPD. 4014 * spidx1: object, it is often from PFKEY message. 4015 * OUT: 4016 * 1 : equal 4017 * 0 : not equal 4018 */ 4019 int 4020 key_cmpspidx_exactly( 4021 struct secpolicyindex *spidx0, 4022 struct secpolicyindex *spidx1) 4023 { 4024 /* sanity */ 4025 if (spidx0 == NULL && spidx1 == NULL) 4026 return 1; 4027 4028 if (spidx0 == NULL || spidx1 == NULL) 4029 return 0; 4030 4031 if (spidx0->prefs != spidx1->prefs 4032 || spidx0->prefd != spidx1->prefd 4033 || spidx0->ul_proto != spidx1->ul_proto) 4034 return 0; 4035 4036 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4037 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4038 } 4039 4040 /* 4041 * compare two secindex structure with mask. 4042 * IN: 4043 * spidx0: source, it is often in SPD. 4044 * spidx1: object, it is often from IP header. 4045 * OUT: 4046 * 1 : equal 4047 * 0 : not equal 4048 */ 4049 int 4050 key_cmpspidx_withmask( 4051 struct secpolicyindex *spidx0, 4052 struct secpolicyindex *spidx1) 4053 { 4054 /* sanity */ 4055 if (spidx0 == NULL && spidx1 == NULL) 4056 return 1; 4057 4058 if (spidx0 == NULL || spidx1 == NULL) 4059 return 0; 4060 4061 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4062 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4063 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4064 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4065 return 0; 4066 4067 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4068 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4069 && spidx0->ul_proto != spidx1->ul_proto) 4070 return 0; 4071 4072 switch (spidx0->src.sa.sa_family) { 4073 case AF_INET: 4074 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4075 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4076 return 0; 4077 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4078 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4079 return 0; 4080 break; 4081 case AF_INET6: 4082 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4083 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4084 return 0; 4085 /* 4086 * scope_id check. if sin6_scope_id is 0, we regard it 4087 * as a wildcard scope, which matches any scope zone ID. 4088 */ 4089 if (spidx0->src.sin6.sin6_scope_id && 4090 spidx1->src.sin6.sin6_scope_id && 4091 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4092 return 0; 4093 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4094 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4095 return 0; 4096 break; 4097 default: 4098 /* XXX */ 4099 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4100 return 0; 4101 break; 4102 } 4103 4104 switch (spidx0->dst.sa.sa_family) { 4105 case AF_INET: 4106 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4107 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4108 return 0; 4109 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4110 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4111 return 0; 4112 break; 4113 case AF_INET6: 4114 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4115 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4116 return 0; 4117 /* 4118 * scope_id check. if sin6_scope_id is 0, we regard it 4119 * as a wildcard scope, which matches any scope zone ID. 4120 */ 4121 if (spidx0->src.sin6.sin6_scope_id && 4122 spidx1->src.sin6.sin6_scope_id && 4123 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4124 return 0; 4125 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4126 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4127 return 0; 4128 break; 4129 default: 4130 /* XXX */ 4131 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4132 return 0; 4133 break; 4134 } 4135 4136 /* XXX Do we check other field ? e.g. flowinfo */ 4137 4138 return 1; 4139 } 4140 4141 /* returns 0 on match */ 4142 static int 4143 key_sockaddrcmp( 4144 const struct sockaddr *sa1, 4145 const struct sockaddr *sa2, 4146 int port) 4147 { 4148 #ifdef satosin 4149 #undef satosin 4150 #endif 4151 #define satosin(s) ((const struct sockaddr_in *)s) 4152 #ifdef satosin6 4153 #undef satosin6 4154 #endif 4155 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4156 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4157 return 1; 4158 4159 switch (sa1->sa_family) { 4160 case AF_INET: 4161 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4162 return 1; 4163 if (satosin(sa1)->sin_addr.s_addr != 4164 satosin(sa2)->sin_addr.s_addr) { 4165 return 1; 4166 } 4167 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4168 return 1; 4169 break; 4170 case AF_INET6: 4171 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4172 return 1; /*EINVAL*/ 4173 if (satosin6(sa1)->sin6_scope_id != 4174 satosin6(sa2)->sin6_scope_id) { 4175 return 1; 4176 } 4177 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4178 &satosin6(sa2)->sin6_addr)) { 4179 return 1; 4180 } 4181 if (port && 4182 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4183 return 1; 4184 } 4185 break; 4186 default: 4187 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4188 return 1; 4189 break; 4190 } 4191 4192 return 0; 4193 #undef satosin 4194 #undef satosin6 4195 } 4196 4197 /* 4198 * compare two buffers with mask. 4199 * IN: 4200 * addr1: source 4201 * addr2: object 4202 * bits: Number of bits to compare 4203 * OUT: 4204 * 1 : equal 4205 * 0 : not equal 4206 */ 4207 static int 4208 key_bbcmp(const void *a1, const void *a2, u_int bits) 4209 { 4210 const unsigned char *p1 = a1; 4211 const unsigned char *p2 = a2; 4212 4213 /* XXX: This could be considerably faster if we compare a word 4214 * at a time, but it is complicated on LSB Endian machines */ 4215 4216 /* Handle null pointers */ 4217 if (p1 == NULL || p2 == NULL) 4218 return (p1 == p2); 4219 4220 while (bits >= 8) { 4221 if (*p1++ != *p2++) 4222 return 0; 4223 bits -= 8; 4224 } 4225 4226 if (bits > 0) { 4227 u_int8_t mask = ~((1<<(8-bits))-1); 4228 if ((*p1 & mask) != (*p2 & mask)) 4229 return 0; 4230 } 4231 return 1; /* Match! */ 4232 } 4233 4234 /* 4235 * time handler. 4236 * scanning SPD and SAD to check status for each entries, 4237 * and do to remove or to expire. 4238 * XXX: year 2038 problem may remain. 4239 */ 4240 void 4241 key_timehandler(void* arg) 4242 { 4243 u_int dir; 4244 int s; 4245 time_t now = time_second; 4246 4247 s = splsoftnet(); /*called from softclock()*/ 4248 4249 /* SPD */ 4250 { 4251 struct secpolicy *sp, *nextsp; 4252 4253 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4254 for (sp = LIST_FIRST(&sptree[dir]); 4255 sp != NULL; 4256 sp = nextsp) { 4257 4258 nextsp = LIST_NEXT(sp, chain); 4259 4260 if (sp->state == IPSEC_SPSTATE_DEAD) { 4261 key_sp_unlink(sp); /*XXX*/ 4262 4263 /* 'sp' dead; continue transfers to 4264 * 'sp = nextsp' 4265 */ 4266 continue; 4267 } 4268 4269 if (sp->lifetime == 0 && sp->validtime == 0) 4270 continue; 4271 4272 /* the deletion will occur next time */ 4273 if ((sp->lifetime && now - sp->created > sp->lifetime) 4274 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4275 key_sp_dead(sp); 4276 key_spdexpire(sp); 4277 continue; 4278 } 4279 } 4280 } 4281 } 4282 4283 /* SAD */ 4284 { 4285 struct secashead *sah, *nextsah; 4286 struct secasvar *sav, *nextsav; 4287 4288 for (sah = LIST_FIRST(&sahtree); 4289 sah != NULL; 4290 sah = nextsah) { 4291 4292 nextsah = LIST_NEXT(sah, chain); 4293 4294 /* if sah has been dead, then delete it and process next sah. */ 4295 if (sah->state == SADB_SASTATE_DEAD) { 4296 key_delsah(sah); 4297 continue; 4298 } 4299 4300 /* if LARVAL entry doesn't become MATURE, delete it. */ 4301 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4302 sav != NULL; 4303 sav = nextsav) { 4304 4305 nextsav = LIST_NEXT(sav, chain); 4306 4307 if (now - sav->created > key_larval_lifetime) { 4308 KEY_FREESAV(&sav); 4309 } 4310 } 4311 4312 /* 4313 * check MATURE entry to start to send expire message 4314 * whether or not. 4315 */ 4316 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4317 sav != NULL; 4318 sav = nextsav) { 4319 4320 nextsav = LIST_NEXT(sav, chain); 4321 4322 /* we don't need to check. */ 4323 if (sav->lft_s == NULL) 4324 continue; 4325 4326 /* sanity check */ 4327 if (sav->lft_c == NULL) { 4328 ipseclog((LOG_DEBUG,"key_timehandler: " 4329 "There is no CURRENT time, why?\n")); 4330 continue; 4331 } 4332 4333 /* check SOFT lifetime */ 4334 if (sav->lft_s->sadb_lifetime_addtime != 0 4335 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4336 /* 4337 * check SA to be used whether or not. 4338 * when SA hasn't been used, delete it. 4339 */ 4340 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4341 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4342 KEY_FREESAV(&sav); 4343 } else { 4344 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4345 /* 4346 * XXX If we keep to send expire 4347 * message in the status of 4348 * DYING. Do remove below code. 4349 */ 4350 key_expire(sav); 4351 } 4352 } 4353 /* check SOFT lifetime by bytes */ 4354 /* 4355 * XXX I don't know the way to delete this SA 4356 * when new SA is installed. Caution when it's 4357 * installed too big lifetime by time. 4358 */ 4359 else if (sav->lft_s->sadb_lifetime_bytes != 0 4360 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4361 4362 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4363 /* 4364 * XXX If we keep to send expire 4365 * message in the status of 4366 * DYING. Do remove below code. 4367 */ 4368 key_expire(sav); 4369 } 4370 } 4371 4372 /* check DYING entry to change status to DEAD. */ 4373 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4374 sav != NULL; 4375 sav = nextsav) { 4376 4377 nextsav = LIST_NEXT(sav, chain); 4378 4379 /* we don't need to check. */ 4380 if (sav->lft_h == NULL) 4381 continue; 4382 4383 /* sanity check */ 4384 if (sav->lft_c == NULL) { 4385 ipseclog((LOG_DEBUG, "key_timehandler: " 4386 "There is no CURRENT time, why?\n")); 4387 continue; 4388 } 4389 4390 if (sav->lft_h->sadb_lifetime_addtime != 0 4391 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4392 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4393 KEY_FREESAV(&sav); 4394 } 4395 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4396 else if (sav->lft_s != NULL 4397 && sav->lft_s->sadb_lifetime_addtime != 0 4398 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4399 /* 4400 * XXX: should be checked to be 4401 * installed the valid SA. 4402 */ 4403 4404 /* 4405 * If there is no SA then sending 4406 * expire message. 4407 */ 4408 key_expire(sav); 4409 } 4410 #endif 4411 /* check HARD lifetime by bytes */ 4412 else if (sav->lft_h->sadb_lifetime_bytes != 0 4413 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4414 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4415 KEY_FREESAV(&sav); 4416 } 4417 } 4418 4419 /* delete entry in DEAD */ 4420 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4421 sav != NULL; 4422 sav = nextsav) { 4423 4424 nextsav = LIST_NEXT(sav, chain); 4425 4426 /* sanity check */ 4427 if (sav->state != SADB_SASTATE_DEAD) { 4428 ipseclog((LOG_DEBUG, "key_timehandler: " 4429 "invalid sav->state " 4430 "(queue: %d SA: %d): " 4431 "kill it anyway\n", 4432 SADB_SASTATE_DEAD, sav->state)); 4433 } 4434 4435 /* 4436 * do not call key_freesav() here. 4437 * sav should already be freed, and sav->refcnt 4438 * shows other references to sav 4439 * (such as from SPD). 4440 */ 4441 } 4442 } 4443 } 4444 4445 #ifndef IPSEC_NONBLOCK_ACQUIRE 4446 /* ACQ tree */ 4447 { 4448 struct secacq *acq, *nextacq; 4449 4450 for (acq = LIST_FIRST(&acqtree); 4451 acq != NULL; 4452 acq = nextacq) { 4453 4454 nextacq = LIST_NEXT(acq, chain); 4455 4456 if (now - acq->created > key_blockacq_lifetime 4457 && __LIST_CHAINED(acq)) { 4458 LIST_REMOVE(acq, chain); 4459 KFREE(acq); 4460 } 4461 } 4462 } 4463 #endif 4464 4465 /* SP ACQ tree */ 4466 { 4467 struct secspacq *acq, *nextacq; 4468 4469 for (acq = LIST_FIRST(&spacqtree); 4470 acq != NULL; 4471 acq = nextacq) { 4472 4473 nextacq = LIST_NEXT(acq, chain); 4474 4475 if (now - acq->created > key_blockacq_lifetime 4476 && __LIST_CHAINED(acq)) { 4477 LIST_REMOVE(acq, chain); 4478 KFREE(acq); 4479 } 4480 } 4481 } 4482 4483 /* initialize random seed */ 4484 if (key_tick_init_random++ > key_int_random) { 4485 key_tick_init_random = 0; 4486 key_srandom(); 4487 } 4488 4489 #ifndef IPSEC_DEBUG2 4490 /* do exchange to tick time !! */ 4491 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4492 #endif /* IPSEC_DEBUG2 */ 4493 4494 splx(s); 4495 return; 4496 } 4497 4498 #ifdef __NetBSD__ 4499 void srandom(int); 4500 void srandom(int arg) {return;} 4501 #endif 4502 4503 /* 4504 * to initialize a seed for random() 4505 */ 4506 static void 4507 key_srandom() 4508 { 4509 srandom(time_second); 4510 } 4511 4512 u_long 4513 key_random() 4514 { 4515 u_long value; 4516 4517 key_randomfill(&value, sizeof(value)); 4518 return value; 4519 } 4520 4521 void 4522 key_randomfill(p, l) 4523 void *p; 4524 size_t l; 4525 { 4526 size_t n; 4527 u_long v; 4528 static int warn = 1; 4529 4530 n = 0; 4531 n = (size_t)read_random(p, (u_int)l); 4532 /* last resort */ 4533 while (n < l) { 4534 v = random(); 4535 bcopy(&v, (u_int8_t *)p + n, 4536 l - n < sizeof(v) ? l - n : sizeof(v)); 4537 n += sizeof(v); 4538 4539 if (warn) { 4540 printf("WARNING: pseudo-random number generator " 4541 "used for IPsec processing\n"); 4542 warn = 0; 4543 } 4544 } 4545 } 4546 4547 /* 4548 * map SADB_SATYPE_* to IPPROTO_*. 4549 * if satype == SADB_SATYPE then satype is mapped to ~0. 4550 * OUT: 4551 * 0: invalid satype. 4552 */ 4553 static u_int16_t 4554 key_satype2proto(satype) 4555 u_int8_t satype; 4556 { 4557 switch (satype) { 4558 case SADB_SATYPE_UNSPEC: 4559 return IPSEC_PROTO_ANY; 4560 case SADB_SATYPE_AH: 4561 return IPPROTO_AH; 4562 case SADB_SATYPE_ESP: 4563 return IPPROTO_ESP; 4564 case SADB_X_SATYPE_IPCOMP: 4565 return IPPROTO_IPCOMP; 4566 case SADB_X_SATYPE_TCPSIGNATURE: 4567 return IPPROTO_TCP; 4568 default: 4569 return 0; 4570 } 4571 /* NOTREACHED */ 4572 } 4573 4574 /* 4575 * map IPPROTO_* to SADB_SATYPE_* 4576 * OUT: 4577 * 0: invalid protocol type. 4578 */ 4579 static u_int8_t 4580 key_proto2satype(proto) 4581 u_int16_t proto; 4582 { 4583 switch (proto) { 4584 case IPPROTO_AH: 4585 return SADB_SATYPE_AH; 4586 case IPPROTO_ESP: 4587 return SADB_SATYPE_ESP; 4588 case IPPROTO_IPCOMP: 4589 return SADB_X_SATYPE_IPCOMP; 4590 case IPPROTO_TCP: 4591 return SADB_X_SATYPE_TCPSIGNATURE; 4592 default: 4593 return 0; 4594 } 4595 /* NOTREACHED */ 4596 } 4597 4598 /* %%% PF_KEY */ 4599 /* 4600 * SADB_GETSPI processing is to receive 4601 * <base, (SA2), src address, dst address, (SPI range)> 4602 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4603 * tree with the status of LARVAL, and send 4604 * <base, SA(*), address(SD)> 4605 * to the IKMPd. 4606 * 4607 * IN: mhp: pointer to the pointer to each header. 4608 * OUT: NULL if fail. 4609 * other if success, return pointer to the message to send. 4610 */ 4611 static int 4612 key_getspi(so, m, mhp) 4613 struct socket *so; 4614 struct mbuf *m; 4615 const struct sadb_msghdr *mhp; 4616 { 4617 struct sadb_address *src0, *dst0; 4618 struct secasindex saidx; 4619 struct secashead *newsah; 4620 struct secasvar *newsav; 4621 u_int8_t proto; 4622 u_int32_t spi; 4623 u_int8_t mode; 4624 u_int16_t reqid; 4625 int error; 4626 4627 /* sanity check */ 4628 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4629 panic("key_getspi: NULL pointer is passed"); 4630 4631 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4632 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4633 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4634 return key_senderror(so, m, EINVAL); 4635 } 4636 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4637 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4638 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4639 return key_senderror(so, m, EINVAL); 4640 } 4641 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4642 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4643 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4644 } else { 4645 mode = IPSEC_MODE_ANY; 4646 reqid = 0; 4647 } 4648 4649 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4650 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4651 4652 /* map satype to proto */ 4653 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4654 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4655 return key_senderror(so, m, EINVAL); 4656 } 4657 4658 /* make sure if port number is zero. */ 4659 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4660 case AF_INET: 4661 if (((struct sockaddr *)(src0 + 1))->sa_len != 4662 sizeof(struct sockaddr_in)) 4663 return key_senderror(so, m, EINVAL); 4664 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4665 break; 4666 case AF_INET6: 4667 if (((struct sockaddr *)(src0 + 1))->sa_len != 4668 sizeof(struct sockaddr_in6)) 4669 return key_senderror(so, m, EINVAL); 4670 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4671 break; 4672 default: 4673 ; /*???*/ 4674 } 4675 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4676 case AF_INET: 4677 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4678 sizeof(struct sockaddr_in)) 4679 return key_senderror(so, m, EINVAL); 4680 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4681 break; 4682 case AF_INET6: 4683 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4684 sizeof(struct sockaddr_in6)) 4685 return key_senderror(so, m, EINVAL); 4686 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4687 break; 4688 default: 4689 ; /*???*/ 4690 } 4691 4692 /* XXX boundary check against sa_len */ 4693 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4694 4695 /* SPI allocation */ 4696 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4697 &saidx); 4698 if (spi == 0) 4699 return key_senderror(so, m, EINVAL); 4700 4701 /* get a SA index */ 4702 if ((newsah = key_getsah(&saidx)) == NULL) { 4703 /* create a new SA index */ 4704 if ((newsah = key_newsah(&saidx)) == NULL) { 4705 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4706 return key_senderror(so, m, ENOBUFS); 4707 } 4708 } 4709 4710 /* get a new SA */ 4711 /* XXX rewrite */ 4712 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4713 if (newsav == NULL) { 4714 /* XXX don't free new SA index allocated in above. */ 4715 return key_senderror(so, m, error); 4716 } 4717 4718 /* set spi */ 4719 newsav->spi = htonl(spi); 4720 4721 #ifndef IPSEC_NONBLOCK_ACQUIRE 4722 /* delete the entry in acqtree */ 4723 if (mhp->msg->sadb_msg_seq != 0) { 4724 struct secacq *acq; 4725 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4726 /* reset counter in order to deletion by timehandler. */ 4727 acq->created = time_second; 4728 acq->count = 0; 4729 } 4730 } 4731 #endif 4732 4733 { 4734 struct mbuf *n, *nn; 4735 struct sadb_sa *m_sa; 4736 struct sadb_msg *newmsg; 4737 int off, len; 4738 4739 /* create new sadb_msg to reply. */ 4740 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4741 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4742 if (len > MCLBYTES) 4743 return key_senderror(so, m, ENOBUFS); 4744 4745 MGETHDR(n, M_DONTWAIT, MT_DATA); 4746 if (len > MHLEN) { 4747 MCLGET(n, M_DONTWAIT); 4748 if ((n->m_flags & M_EXT) == 0) { 4749 m_freem(n); 4750 n = NULL; 4751 } 4752 } 4753 if (!n) 4754 return key_senderror(so, m, ENOBUFS); 4755 4756 n->m_len = len; 4757 n->m_next = NULL; 4758 off = 0; 4759 4760 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4761 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4762 4763 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4764 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4765 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4766 m_sa->sadb_sa_spi = htonl(spi); 4767 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4768 4769 #ifdef DIAGNOSTIC 4770 if (off != len) 4771 panic("length inconsistency in key_getspi"); 4772 #endif 4773 4774 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4775 SADB_EXT_ADDRESS_DST); 4776 if (!n->m_next) { 4777 m_freem(n); 4778 return key_senderror(so, m, ENOBUFS); 4779 } 4780 4781 if (n->m_len < sizeof(struct sadb_msg)) { 4782 n = m_pullup(n, sizeof(struct sadb_msg)); 4783 if (n == NULL) 4784 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4785 } 4786 4787 n->m_pkthdr.len = 0; 4788 for (nn = n; nn; nn = nn->m_next) 4789 n->m_pkthdr.len += nn->m_len; 4790 4791 newmsg = mtod(n, struct sadb_msg *); 4792 newmsg->sadb_msg_seq = newsav->seq; 4793 newmsg->sadb_msg_errno = 0; 4794 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4795 4796 m_freem(m); 4797 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4798 } 4799 } 4800 4801 /* 4802 * allocating new SPI 4803 * called by key_getspi(). 4804 * OUT: 4805 * 0: failure. 4806 * others: success. 4807 */ 4808 static u_int32_t 4809 key_do_getnewspi(spirange, saidx) 4810 struct sadb_spirange *spirange; 4811 struct secasindex *saidx; 4812 { 4813 u_int32_t newspi; 4814 u_int32_t spmin, spmax; 4815 int count = key_spi_trycnt; 4816 4817 /* set spi range to allocate */ 4818 if (spirange != NULL) { 4819 spmin = spirange->sadb_spirange_min; 4820 spmax = spirange->sadb_spirange_max; 4821 } else { 4822 spmin = key_spi_minval; 4823 spmax = key_spi_maxval; 4824 } 4825 /* IPCOMP needs 2-byte SPI */ 4826 if (saidx->proto == IPPROTO_IPCOMP) { 4827 u_int32_t t; 4828 if (spmin >= 0x10000) 4829 spmin = 0xffff; 4830 if (spmax >= 0x10000) 4831 spmax = 0xffff; 4832 if (spmin > spmax) { 4833 t = spmin; spmin = spmax; spmax = t; 4834 } 4835 } 4836 4837 if (spmin == spmax) { 4838 if (key_checkspidup(saidx, spmin) != NULL) { 4839 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 4840 return 0; 4841 } 4842 4843 count--; /* taking one cost. */ 4844 newspi = spmin; 4845 4846 } else { 4847 4848 /* init SPI */ 4849 newspi = 0; 4850 4851 /* when requesting to allocate spi ranged */ 4852 while (count--) { 4853 /* generate pseudo-random SPI value ranged. */ 4854 newspi = spmin + (key_random() % (spmax - spmin + 1)); 4855 4856 if (key_checkspidup(saidx, newspi) == NULL) 4857 break; 4858 } 4859 4860 if (count == 0 || newspi == 0) { 4861 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 4862 return 0; 4863 } 4864 } 4865 4866 /* statistics */ 4867 keystat.getspi_count = 4868 (keystat.getspi_count + key_spi_trycnt - count) / 2; 4869 4870 return newspi; 4871 } 4872 4873 /* 4874 * SADB_UPDATE processing 4875 * receive 4876 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4877 * key(AE), (identity(SD),) (sensitivity)> 4878 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4879 * and send 4880 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4881 * (identity(SD),) (sensitivity)> 4882 * to the ikmpd. 4883 * 4884 * m will always be freed. 4885 */ 4886 static int 4887 key_update(so, m, mhp) 4888 struct socket *so; 4889 struct mbuf *m; 4890 const struct sadb_msghdr *mhp; 4891 { 4892 struct sadb_sa *sa0; 4893 struct sadb_address *src0, *dst0; 4894 struct secasindex saidx; 4895 struct secashead *sah; 4896 struct secasvar *sav; 4897 u_int16_t proto; 4898 u_int8_t mode; 4899 u_int16_t reqid; 4900 int error; 4901 4902 /* sanity check */ 4903 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4904 panic("key_update: NULL pointer is passed"); 4905 4906 /* map satype to proto */ 4907 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4908 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 4909 return key_senderror(so, m, EINVAL); 4910 } 4911 4912 if (mhp->ext[SADB_EXT_SA] == NULL || 4913 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4914 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4915 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4916 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4917 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4918 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4919 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4920 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4921 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4922 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4923 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4924 return key_senderror(so, m, EINVAL); 4925 } 4926 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4927 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4928 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4929 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4930 return key_senderror(so, m, EINVAL); 4931 } 4932 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4933 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4934 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4935 } else { 4936 mode = IPSEC_MODE_ANY; 4937 reqid = 0; 4938 } 4939 /* XXX boundary checking for other extensions */ 4940 4941 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4942 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4943 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4944 4945 /* XXX boundary check against sa_len */ 4946 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4947 4948 /* get a SA header */ 4949 if ((sah = key_getsah(&saidx)) == NULL) { 4950 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 4951 return key_senderror(so, m, ENOENT); 4952 } 4953 4954 /* set spidx if there */ 4955 /* XXX rewrite */ 4956 error = key_setident(sah, m, mhp); 4957 if (error) 4958 return key_senderror(so, m, error); 4959 4960 /* find a SA with sequence number. */ 4961 #ifdef IPSEC_DOSEQCHECK 4962 if (mhp->msg->sadb_msg_seq != 0 4963 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4964 ipseclog((LOG_DEBUG, 4965 "key_update: no larval SA with sequence %u exists.\n", 4966 mhp->msg->sadb_msg_seq)); 4967 return key_senderror(so, m, ENOENT); 4968 } 4969 #else 4970 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 4971 ipseclog((LOG_DEBUG, 4972 "key_update: no such a SA found (spi:%u)\n", 4973 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4974 return key_senderror(so, m, EINVAL); 4975 } 4976 #endif 4977 4978 /* validity check */ 4979 if (sav->sah->saidx.proto != proto) { 4980 ipseclog((LOG_DEBUG, 4981 "key_update: protocol mismatched (DB=%u param=%u)\n", 4982 sav->sah->saidx.proto, proto)); 4983 return key_senderror(so, m, EINVAL); 4984 } 4985 #ifdef IPSEC_DOSEQCHECK 4986 if (sav->spi != sa0->sadb_sa_spi) { 4987 ipseclog((LOG_DEBUG, 4988 "key_update: SPI mismatched (DB:%u param:%u)\n", 4989 (u_int32_t)ntohl(sav->spi), 4990 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4991 return key_senderror(so, m, EINVAL); 4992 } 4993 #endif 4994 if (sav->pid != mhp->msg->sadb_msg_pid) { 4995 ipseclog((LOG_DEBUG, 4996 "key_update: pid mismatched (DB:%u param:%u)\n", 4997 sav->pid, mhp->msg->sadb_msg_pid)); 4998 return key_senderror(so, m, EINVAL); 4999 } 5000 5001 /* copy sav values */ 5002 error = key_setsaval(sav, m, mhp); 5003 if (error) { 5004 KEY_FREESAV(&sav); 5005 return key_senderror(so, m, error); 5006 } 5007 5008 /* check SA values to be mature. */ 5009 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5010 KEY_FREESAV(&sav); 5011 return key_senderror(so, m, 0); 5012 } 5013 5014 { 5015 struct mbuf *n; 5016 5017 /* set msg buf from mhp */ 5018 n = key_getmsgbuf_x1(m, mhp); 5019 if (n == NULL) { 5020 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5021 return key_senderror(so, m, ENOBUFS); 5022 } 5023 5024 m_freem(m); 5025 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5026 } 5027 } 5028 5029 /* 5030 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5031 * only called by key_update(). 5032 * OUT: 5033 * NULL : not found 5034 * others : found, pointer to a SA. 5035 */ 5036 #ifdef IPSEC_DOSEQCHECK 5037 static struct secasvar * 5038 key_getsavbyseq(sah, seq) 5039 struct secashead *sah; 5040 u_int32_t seq; 5041 { 5042 struct secasvar *sav; 5043 u_int state; 5044 5045 state = SADB_SASTATE_LARVAL; 5046 5047 /* search SAD with sequence number ? */ 5048 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5049 5050 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5051 5052 if (sav->seq == seq) { 5053 SA_ADDREF(sav); 5054 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5055 printf("DP key_getsavbyseq cause " 5056 "refcnt++:%d SA:%p\n", 5057 sav->refcnt, sav)); 5058 return sav; 5059 } 5060 } 5061 5062 return NULL; 5063 } 5064 #endif 5065 5066 /* 5067 * SADB_ADD processing 5068 * add an entry to SA database, when received 5069 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5070 * key(AE), (identity(SD),) (sensitivity)> 5071 * from the ikmpd, 5072 * and send 5073 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5074 * (identity(SD),) (sensitivity)> 5075 * to the ikmpd. 5076 * 5077 * IGNORE identity and sensitivity messages. 5078 * 5079 * m will always be freed. 5080 */ 5081 static int 5082 key_add(so, m, mhp) 5083 struct socket *so; 5084 struct mbuf *m; 5085 const struct sadb_msghdr *mhp; 5086 { 5087 struct sadb_sa *sa0; 5088 struct sadb_address *src0, *dst0; 5089 struct secasindex saidx; 5090 struct secashead *newsah; 5091 struct secasvar *newsav; 5092 u_int16_t proto; 5093 u_int8_t mode; 5094 u_int16_t reqid; 5095 int error; 5096 5097 /* sanity check */ 5098 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5099 panic("key_add: NULL pointer is passed"); 5100 5101 /* map satype to proto */ 5102 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5103 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5104 return key_senderror(so, m, EINVAL); 5105 } 5106 5107 if (mhp->ext[SADB_EXT_SA] == NULL || 5108 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5109 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5110 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5111 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5112 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5113 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5114 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5115 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5116 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5117 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5118 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5119 return key_senderror(so, m, EINVAL); 5120 } 5121 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5122 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5123 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5124 /* XXX need more */ 5125 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5126 return key_senderror(so, m, EINVAL); 5127 } 5128 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5129 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5130 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5131 } else { 5132 mode = IPSEC_MODE_ANY; 5133 reqid = 0; 5134 } 5135 5136 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5137 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5138 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5139 5140 /* XXX boundary check against sa_len */ 5141 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5142 5143 /* get a SA header */ 5144 if ((newsah = key_getsah(&saidx)) == NULL) { 5145 /* create a new SA header */ 5146 if ((newsah = key_newsah(&saidx)) == NULL) { 5147 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5148 return key_senderror(so, m, ENOBUFS); 5149 } 5150 } 5151 5152 /* set spidx if there */ 5153 /* XXX rewrite */ 5154 error = key_setident(newsah, m, mhp); 5155 if (error) { 5156 return key_senderror(so, m, error); 5157 } 5158 5159 /* create new SA entry. */ 5160 /* We can create new SA only if SPI is differenct. */ 5161 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5162 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5163 return key_senderror(so, m, EEXIST); 5164 } 5165 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5166 if (newsav == NULL) { 5167 return key_senderror(so, m, error); 5168 } 5169 5170 /* check SA values to be mature. */ 5171 if ((error = key_mature(newsav)) != 0) { 5172 KEY_FREESAV(&newsav); 5173 return key_senderror(so, m, error); 5174 } 5175 5176 /* 5177 * don't call key_freesav() here, as we would like to keep the SA 5178 * in the database on success. 5179 */ 5180 5181 { 5182 struct mbuf *n; 5183 5184 /* set msg buf from mhp */ 5185 n = key_getmsgbuf_x1(m, mhp); 5186 if (n == NULL) { 5187 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5188 return key_senderror(so, m, ENOBUFS); 5189 } 5190 5191 m_freem(m); 5192 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5193 } 5194 } 5195 5196 /* m is retained */ 5197 static int 5198 key_setident(sah, m, mhp) 5199 struct secashead *sah; 5200 struct mbuf *m; 5201 const struct sadb_msghdr *mhp; 5202 { 5203 const struct sadb_ident *idsrc, *iddst; 5204 int idsrclen, iddstlen; 5205 5206 /* sanity check */ 5207 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5208 panic("key_setident: NULL pointer is passed"); 5209 5210 /* don't make buffer if not there */ 5211 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5212 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5213 sah->idents = NULL; 5214 sah->identd = NULL; 5215 return 0; 5216 } 5217 5218 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5219 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5220 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5221 return EINVAL; 5222 } 5223 5224 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5225 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5226 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5227 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5228 5229 /* validity check */ 5230 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5231 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5232 return EINVAL; 5233 } 5234 5235 switch (idsrc->sadb_ident_type) { 5236 case SADB_IDENTTYPE_PREFIX: 5237 case SADB_IDENTTYPE_FQDN: 5238 case SADB_IDENTTYPE_USERFQDN: 5239 default: 5240 /* XXX do nothing */ 5241 sah->idents = NULL; 5242 sah->identd = NULL; 5243 return 0; 5244 } 5245 5246 /* make structure */ 5247 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5248 if (sah->idents == NULL) { 5249 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5250 return ENOBUFS; 5251 } 5252 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5253 if (sah->identd == NULL) { 5254 KFREE(sah->idents); 5255 sah->idents = NULL; 5256 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5257 return ENOBUFS; 5258 } 5259 bcopy(idsrc, sah->idents, idsrclen); 5260 bcopy(iddst, sah->identd, iddstlen); 5261 5262 return 0; 5263 } 5264 5265 /* 5266 * m will not be freed on return. 5267 * it is caller's responsibility to free the result. 5268 */ 5269 static struct mbuf * 5270 key_getmsgbuf_x1(m, mhp) 5271 struct mbuf *m; 5272 const struct sadb_msghdr *mhp; 5273 { 5274 struct mbuf *n; 5275 5276 /* sanity check */ 5277 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5278 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5279 5280 /* create new sadb_msg to reply. */ 5281 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5282 SADB_EXT_SA, SADB_X_EXT_SA2, 5283 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5284 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5285 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5286 if (!n) 5287 return NULL; 5288 5289 if (n->m_len < sizeof(struct sadb_msg)) { 5290 n = m_pullup(n, sizeof(struct sadb_msg)); 5291 if (n == NULL) 5292 return NULL; 5293 } 5294 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5295 mtod(n, struct sadb_msg *)->sadb_msg_len = 5296 PFKEY_UNIT64(n->m_pkthdr.len); 5297 5298 return n; 5299 } 5300 5301 static int key_delete_all __P((struct socket *, struct mbuf *, 5302 const struct sadb_msghdr *, u_int16_t)); 5303 5304 /* 5305 * SADB_DELETE processing 5306 * receive 5307 * <base, SA(*), address(SD)> 5308 * from the ikmpd, and set SADB_SASTATE_DEAD, 5309 * and send, 5310 * <base, SA(*), address(SD)> 5311 * to the ikmpd. 5312 * 5313 * m will always be freed. 5314 */ 5315 static int 5316 key_delete(so, m, mhp) 5317 struct socket *so; 5318 struct mbuf *m; 5319 const struct sadb_msghdr *mhp; 5320 { 5321 struct sadb_sa *sa0; 5322 struct sadb_address *src0, *dst0; 5323 struct secasindex saidx; 5324 struct secashead *sah; 5325 struct secasvar *sav = NULL; 5326 u_int16_t proto; 5327 5328 /* sanity check */ 5329 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5330 panic("key_delete: NULL pointer is passed"); 5331 5332 /* map satype to proto */ 5333 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5334 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5335 return key_senderror(so, m, EINVAL); 5336 } 5337 5338 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5339 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5340 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5341 return key_senderror(so, m, EINVAL); 5342 } 5343 5344 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5345 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5346 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5347 return key_senderror(so, m, EINVAL); 5348 } 5349 5350 if (mhp->ext[SADB_EXT_SA] == NULL) { 5351 /* 5352 * Caller wants us to delete all non-LARVAL SAs 5353 * that match the src/dst. This is used during 5354 * IKE INITIAL-CONTACT. 5355 */ 5356 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5357 return key_delete_all(so, m, mhp, proto); 5358 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5359 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5360 return key_senderror(so, m, EINVAL); 5361 } 5362 5363 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5364 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5365 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5366 5367 /* XXX boundary check against sa_len */ 5368 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5369 5370 /* get a SA header */ 5371 LIST_FOREACH(sah, &sahtree, chain) { 5372 if (sah->state == SADB_SASTATE_DEAD) 5373 continue; 5374 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5375 continue; 5376 5377 /* get a SA with SPI. */ 5378 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5379 if (sav) 5380 break; 5381 } 5382 if (sah == NULL) { 5383 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5384 return key_senderror(so, m, ENOENT); 5385 } 5386 5387 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5388 KEY_FREESAV(&sav); 5389 5390 { 5391 struct mbuf *n; 5392 struct sadb_msg *newmsg; 5393 5394 /* create new sadb_msg to reply. */ 5395 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5396 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5397 if (!n) 5398 return key_senderror(so, m, ENOBUFS); 5399 5400 if (n->m_len < sizeof(struct sadb_msg)) { 5401 n = m_pullup(n, sizeof(struct sadb_msg)); 5402 if (n == NULL) 5403 return key_senderror(so, m, ENOBUFS); 5404 } 5405 newmsg = mtod(n, struct sadb_msg *); 5406 newmsg->sadb_msg_errno = 0; 5407 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5408 5409 m_freem(m); 5410 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5411 } 5412 } 5413 5414 /* 5415 * delete all SAs for src/dst. Called from key_delete(). 5416 */ 5417 static int 5418 key_delete_all(so, m, mhp, proto) 5419 struct socket *so; 5420 struct mbuf *m; 5421 const struct sadb_msghdr *mhp; 5422 u_int16_t proto; 5423 { 5424 struct sadb_address *src0, *dst0; 5425 struct secasindex saidx; 5426 struct secashead *sah; 5427 struct secasvar *sav, *nextsav; 5428 u_int stateidx, state; 5429 5430 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5431 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5432 5433 /* XXX boundary check against sa_len */ 5434 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5435 5436 LIST_FOREACH(sah, &sahtree, chain) { 5437 if (sah->state == SADB_SASTATE_DEAD) 5438 continue; 5439 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5440 continue; 5441 5442 /* Delete all non-LARVAL SAs. */ 5443 for (stateidx = 0; 5444 stateidx < _ARRAYLEN(saorder_state_alive); 5445 stateidx++) { 5446 state = saorder_state_alive[stateidx]; 5447 if (state == SADB_SASTATE_LARVAL) 5448 continue; 5449 for (sav = LIST_FIRST(&sah->savtree[state]); 5450 sav != NULL; sav = nextsav) { 5451 nextsav = LIST_NEXT(sav, chain); 5452 /* sanity check */ 5453 if (sav->state != state) { 5454 ipseclog((LOG_DEBUG, "key_delete_all: " 5455 "invalid sav->state " 5456 "(queue: %d SA: %d)\n", 5457 state, sav->state)); 5458 continue; 5459 } 5460 5461 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5462 KEY_FREESAV(&sav); 5463 } 5464 } 5465 } 5466 { 5467 struct mbuf *n; 5468 struct sadb_msg *newmsg; 5469 5470 /* create new sadb_msg to reply. */ 5471 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5472 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5473 if (!n) 5474 return key_senderror(so, m, ENOBUFS); 5475 5476 if (n->m_len < sizeof(struct sadb_msg)) { 5477 n = m_pullup(n, sizeof(struct sadb_msg)); 5478 if (n == NULL) 5479 return key_senderror(so, m, ENOBUFS); 5480 } 5481 newmsg = mtod(n, struct sadb_msg *); 5482 newmsg->sadb_msg_errno = 0; 5483 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5484 5485 m_freem(m); 5486 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5487 } 5488 } 5489 5490 /* 5491 * SADB_GET processing 5492 * receive 5493 * <base, SA(*), address(SD)> 5494 * from the ikmpd, and get a SP and a SA to respond, 5495 * and send, 5496 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5497 * (identity(SD),) (sensitivity)> 5498 * to the ikmpd. 5499 * 5500 * m will always be freed. 5501 */ 5502 static int 5503 key_get(so, m, mhp) 5504 struct socket *so; 5505 struct mbuf *m; 5506 const struct sadb_msghdr *mhp; 5507 { 5508 struct sadb_sa *sa0; 5509 struct sadb_address *src0, *dst0; 5510 struct secasindex saidx; 5511 struct secashead *sah; 5512 struct secasvar *sav = NULL; 5513 u_int16_t proto; 5514 5515 /* sanity check */ 5516 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5517 panic("key_get: NULL pointer is passed"); 5518 5519 /* map satype to proto */ 5520 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5521 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5522 return key_senderror(so, m, EINVAL); 5523 } 5524 5525 if (mhp->ext[SADB_EXT_SA] == NULL || 5526 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5527 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5528 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5529 return key_senderror(so, m, EINVAL); 5530 } 5531 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5532 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5533 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5534 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5535 return key_senderror(so, m, EINVAL); 5536 } 5537 5538 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5539 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5540 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5541 5542 /* XXX boundary check against sa_len */ 5543 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5544 5545 /* get a SA header */ 5546 LIST_FOREACH(sah, &sahtree, chain) { 5547 if (sah->state == SADB_SASTATE_DEAD) 5548 continue; 5549 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5550 continue; 5551 5552 /* get a SA with SPI. */ 5553 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5554 if (sav) 5555 break; 5556 } 5557 if (sah == NULL) { 5558 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5559 return key_senderror(so, m, ENOENT); 5560 } 5561 5562 { 5563 struct mbuf *n; 5564 u_int8_t satype; 5565 5566 /* map proto to satype */ 5567 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5568 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5569 return key_senderror(so, m, EINVAL); 5570 } 5571 5572 /* create new sadb_msg to reply. */ 5573 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5574 mhp->msg->sadb_msg_pid); 5575 if (!n) 5576 return key_senderror(so, m, ENOBUFS); 5577 5578 m_freem(m); 5579 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5580 } 5581 } 5582 5583 /* XXX make it sysctl-configurable? */ 5584 static void 5585 key_getcomb_setlifetime(comb) 5586 struct sadb_comb *comb; 5587 { 5588 5589 comb->sadb_comb_soft_allocations = 1; 5590 comb->sadb_comb_hard_allocations = 1; 5591 comb->sadb_comb_soft_bytes = 0; 5592 comb->sadb_comb_hard_bytes = 0; 5593 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5594 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5595 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5596 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5597 } 5598 5599 /* 5600 * XXX reorder combinations by preference 5601 * XXX no idea if the user wants ESP authentication or not 5602 */ 5603 static struct mbuf * 5604 key_getcomb_esp() 5605 { 5606 struct sadb_comb *comb; 5607 struct enc_xform *algo; 5608 struct mbuf *result = NULL, *m, *n; 5609 int encmin; 5610 int i, off, o; 5611 int totlen; 5612 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5613 5614 m = NULL; 5615 for (i = 1; i <= SADB_EALG_MAX; i++) { 5616 algo = esp_algorithm_lookup(i); 5617 if (algo == NULL) 5618 continue; 5619 5620 /* discard algorithms with key size smaller than system min */ 5621 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5622 continue; 5623 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5624 encmin = ipsec_esp_keymin; 5625 else 5626 encmin = _BITS(algo->minkey); 5627 5628 if (ipsec_esp_auth) 5629 m = key_getcomb_ah(); 5630 else { 5631 IPSEC_ASSERT(l <= MLEN, 5632 ("key_getcomb_esp: l=%u > MLEN=%lu", 5633 l, (u_long) MLEN)); 5634 MGET(m, M_DONTWAIT, MT_DATA); 5635 if (m) { 5636 M_ALIGN(m, l); 5637 m->m_len = l; 5638 m->m_next = NULL; 5639 bzero(mtod(m, void *), m->m_len); 5640 } 5641 } 5642 if (!m) 5643 goto fail; 5644 5645 totlen = 0; 5646 for (n = m; n; n = n->m_next) 5647 totlen += n->m_len; 5648 IPSEC_ASSERT((totlen % l) == 0, 5649 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5650 5651 for (off = 0; off < totlen; off += l) { 5652 n = m_pulldown(m, off, l, &o); 5653 if (!n) { 5654 /* m is already freed */ 5655 goto fail; 5656 } 5657 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5658 bzero(comb, sizeof(*comb)); 5659 key_getcomb_setlifetime(comb); 5660 comb->sadb_comb_encrypt = i; 5661 comb->sadb_comb_encrypt_minbits = encmin; 5662 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5663 } 5664 5665 if (!result) 5666 result = m; 5667 else 5668 m_cat(result, m); 5669 } 5670 5671 return result; 5672 5673 fail: 5674 if (result) 5675 m_freem(result); 5676 return NULL; 5677 } 5678 5679 static void 5680 key_getsizes_ah( 5681 const struct auth_hash *ah, 5682 int alg, 5683 u_int16_t* ksmin, 5684 u_int16_t* ksmax) 5685 { 5686 *ksmin = *ksmax = ah->keysize; 5687 if (ah->keysize == 0) { 5688 /* 5689 * Transform takes arbitrary key size but algorithm 5690 * key size is restricted. Enforce this here. 5691 */ 5692 switch (alg) { 5693 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5694 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5695 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 5696 default: 5697 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5698 alg)); 5699 break; 5700 } 5701 } 5702 } 5703 5704 /* 5705 * XXX reorder combinations by preference 5706 */ 5707 static struct mbuf * 5708 key_getcomb_ah() 5709 { 5710 struct sadb_comb *comb; 5711 struct auth_hash *algo; 5712 struct mbuf *m; 5713 u_int16_t minkeysize, maxkeysize; 5714 int i; 5715 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5716 5717 m = NULL; 5718 for (i = 1; i <= SADB_AALG_MAX; i++) { 5719 #if 1 5720 /* we prefer HMAC algorithms, not old algorithms */ 5721 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5722 continue; 5723 #endif 5724 algo = ah_algorithm_lookup(i); 5725 if (!algo) 5726 continue; 5727 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5728 /* discard algorithms with key size smaller than system min */ 5729 if (_BITS(minkeysize) < ipsec_ah_keymin) 5730 continue; 5731 5732 if (!m) { 5733 IPSEC_ASSERT(l <= MLEN, 5734 ("key_getcomb_ah: l=%u > MLEN=%lu", 5735 l, (u_long) MLEN)); 5736 MGET(m, M_DONTWAIT, MT_DATA); 5737 if (m) { 5738 M_ALIGN(m, l); 5739 m->m_len = l; 5740 m->m_next = NULL; 5741 } 5742 } else 5743 M_PREPEND(m, l, M_DONTWAIT); 5744 if (!m) 5745 return NULL; 5746 5747 comb = mtod(m, struct sadb_comb *); 5748 bzero(comb, sizeof(*comb)); 5749 key_getcomb_setlifetime(comb); 5750 comb->sadb_comb_auth = i; 5751 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5752 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5753 } 5754 5755 return m; 5756 } 5757 5758 /* 5759 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 5760 * XXX reorder combinations by preference 5761 */ 5762 static struct mbuf * 5763 key_getcomb_ipcomp() 5764 { 5765 struct sadb_comb *comb; 5766 struct comp_algo *algo; 5767 struct mbuf *m; 5768 int i; 5769 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5770 5771 m = NULL; 5772 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5773 algo = ipcomp_algorithm_lookup(i); 5774 if (!algo) 5775 continue; 5776 5777 if (!m) { 5778 IPSEC_ASSERT(l <= MLEN, 5779 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 5780 l, (u_long) MLEN)); 5781 MGET(m, M_DONTWAIT, MT_DATA); 5782 if (m) { 5783 M_ALIGN(m, l); 5784 m->m_len = l; 5785 m->m_next = NULL; 5786 } 5787 } else 5788 M_PREPEND(m, l, M_DONTWAIT); 5789 if (!m) 5790 return NULL; 5791 5792 comb = mtod(m, struct sadb_comb *); 5793 bzero(comb, sizeof(*comb)); 5794 key_getcomb_setlifetime(comb); 5795 comb->sadb_comb_encrypt = i; 5796 /* what should we set into sadb_comb_*_{min,max}bits? */ 5797 } 5798 5799 return m; 5800 } 5801 5802 /* 5803 * XXX no way to pass mode (transport/tunnel) to userland 5804 * XXX replay checking? 5805 * XXX sysctl interface to ipsec_{ah,esp}_keymin 5806 */ 5807 static struct mbuf * 5808 key_getprop(saidx) 5809 const struct secasindex *saidx; 5810 { 5811 struct sadb_prop *prop; 5812 struct mbuf *m, *n; 5813 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5814 int totlen; 5815 5816 switch (saidx->proto) { 5817 case IPPROTO_ESP: 5818 m = key_getcomb_esp(); 5819 break; 5820 case IPPROTO_AH: 5821 m = key_getcomb_ah(); 5822 break; 5823 case IPPROTO_IPCOMP: 5824 m = key_getcomb_ipcomp(); 5825 break; 5826 default: 5827 return NULL; 5828 } 5829 5830 if (!m) 5831 return NULL; 5832 M_PREPEND(m, l, M_DONTWAIT); 5833 if (!m) 5834 return NULL; 5835 5836 totlen = 0; 5837 for (n = m; n; n = n->m_next) 5838 totlen += n->m_len; 5839 5840 prop = mtod(m, struct sadb_prop *); 5841 bzero(prop, sizeof(*prop)); 5842 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5843 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5844 prop->sadb_prop_replay = 32; /* XXX */ 5845 5846 return m; 5847 } 5848 5849 /* 5850 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5851 * send 5852 * <base, SA, address(SD), (address(P)), x_policy, 5853 * (identity(SD),) (sensitivity,) proposal> 5854 * to KMD, and expect to receive 5855 * <base> with SADB_ACQUIRE if error occurred, 5856 * or 5857 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5858 * from KMD by PF_KEY. 5859 * 5860 * XXX x_policy is outside of RFC2367 (KAME extension). 5861 * XXX sensitivity is not supported. 5862 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5863 * see comment for key_getcomb_ipcomp(). 5864 * 5865 * OUT: 5866 * 0 : succeed 5867 * others: error number 5868 */ 5869 static int 5870 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5871 { 5872 struct mbuf *result = NULL, *m; 5873 #ifndef IPSEC_NONBLOCK_ACQUIRE 5874 struct secacq *newacq; 5875 #endif 5876 u_int8_t satype; 5877 int error = -1; 5878 u_int32_t seq; 5879 5880 /* sanity check */ 5881 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 5882 satype = key_proto2satype(saidx->proto); 5883 IPSEC_ASSERT(satype != 0, 5884 ("key_acquire: null satype, protocol %u", saidx->proto)); 5885 5886 #ifndef IPSEC_NONBLOCK_ACQUIRE 5887 /* 5888 * We never do anything about acquirng SA. There is anather 5889 * solution that kernel blocks to send SADB_ACQUIRE message until 5890 * getting something message from IKEd. In later case, to be 5891 * managed with ACQUIRING list. 5892 */ 5893 /* Get an entry to check whether sending message or not. */ 5894 if ((newacq = key_getacq(saidx)) != NULL) { 5895 if (key_blockacq_count < newacq->count) { 5896 /* reset counter and do send message. */ 5897 newacq->count = 0; 5898 } else { 5899 /* increment counter and do nothing. */ 5900 newacq->count++; 5901 return 0; 5902 } 5903 } else { 5904 /* make new entry for blocking to send SADB_ACQUIRE. */ 5905 if ((newacq = key_newacq(saidx)) == NULL) 5906 return ENOBUFS; 5907 5908 /* add to acqtree */ 5909 LIST_INSERT_HEAD(&acqtree, newacq, chain); 5910 } 5911 #endif 5912 5913 5914 #ifndef IPSEC_NONBLOCK_ACQUIRE 5915 seq = newacq->seq; 5916 #else 5917 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 5918 #endif 5919 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5920 if (!m) { 5921 error = ENOBUFS; 5922 goto fail; 5923 } 5924 result = m; 5925 5926 /* set sadb_address for saidx's. */ 5927 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5928 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5929 if (!m) { 5930 error = ENOBUFS; 5931 goto fail; 5932 } 5933 m_cat(result, m); 5934 5935 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5936 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5937 if (!m) { 5938 error = ENOBUFS; 5939 goto fail; 5940 } 5941 m_cat(result, m); 5942 5943 /* XXX proxy address (optional) */ 5944 5945 /* set sadb_x_policy */ 5946 if (sp) { 5947 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5948 if (!m) { 5949 error = ENOBUFS; 5950 goto fail; 5951 } 5952 m_cat(result, m); 5953 } 5954 5955 /* XXX identity (optional) */ 5956 #if 0 5957 if (idexttype && fqdn) { 5958 /* create identity extension (FQDN) */ 5959 struct sadb_ident *id; 5960 int fqdnlen; 5961 5962 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5963 id = (struct sadb_ident *)p; 5964 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5965 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5966 id->sadb_ident_exttype = idexttype; 5967 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5968 bcopy(fqdn, id + 1, fqdnlen); 5969 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5970 } 5971 5972 if (idexttype) { 5973 /* create identity extension (USERFQDN) */ 5974 struct sadb_ident *id; 5975 int userfqdnlen; 5976 5977 if (userfqdn) { 5978 /* +1 for terminating-NUL */ 5979 userfqdnlen = strlen(userfqdn) + 1; 5980 } else 5981 userfqdnlen = 0; 5982 id = (struct sadb_ident *)p; 5983 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5984 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5985 id->sadb_ident_exttype = idexttype; 5986 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5987 /* XXX is it correct? */ 5988 if (curlwp) 5989 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 5990 if (userfqdn && userfqdnlen) 5991 bcopy(userfqdn, id + 1, userfqdnlen); 5992 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5993 } 5994 #endif 5995 5996 /* XXX sensitivity (optional) */ 5997 5998 /* create proposal/combination extension */ 5999 m = key_getprop(saidx); 6000 #if 0 6001 /* 6002 * spec conformant: always attach proposal/combination extension, 6003 * the problem is that we have no way to attach it for ipcomp, 6004 * due to the way sadb_comb is declared in RFC2367. 6005 */ 6006 if (!m) { 6007 error = ENOBUFS; 6008 goto fail; 6009 } 6010 m_cat(result, m); 6011 #else 6012 /* 6013 * outside of spec; make proposal/combination extension optional. 6014 */ 6015 if (m) 6016 m_cat(result, m); 6017 #endif 6018 6019 if ((result->m_flags & M_PKTHDR) == 0) { 6020 error = EINVAL; 6021 goto fail; 6022 } 6023 6024 if (result->m_len < sizeof(struct sadb_msg)) { 6025 result = m_pullup(result, sizeof(struct sadb_msg)); 6026 if (result == NULL) { 6027 error = ENOBUFS; 6028 goto fail; 6029 } 6030 } 6031 6032 result->m_pkthdr.len = 0; 6033 for (m = result; m; m = m->m_next) 6034 result->m_pkthdr.len += m->m_len; 6035 6036 mtod(result, struct sadb_msg *)->sadb_msg_len = 6037 PFKEY_UNIT64(result->m_pkthdr.len); 6038 6039 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6040 6041 fail: 6042 if (result) 6043 m_freem(result); 6044 return error; 6045 } 6046 6047 #ifndef IPSEC_NONBLOCK_ACQUIRE 6048 static struct secacq * 6049 key_newacq(const struct secasindex *saidx) 6050 { 6051 struct secacq *newacq; 6052 6053 /* get new entry */ 6054 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6055 if (newacq == NULL) { 6056 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6057 return NULL; 6058 } 6059 bzero(newacq, sizeof(*newacq)); 6060 6061 /* copy secindex */ 6062 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6063 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6064 newacq->created = time_second; 6065 newacq->count = 0; 6066 6067 return newacq; 6068 } 6069 6070 static struct secacq * 6071 key_getacq(const struct secasindex *saidx) 6072 { 6073 struct secacq *acq; 6074 6075 LIST_FOREACH(acq, &acqtree, chain) { 6076 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6077 return acq; 6078 } 6079 6080 return NULL; 6081 } 6082 6083 static struct secacq * 6084 key_getacqbyseq(seq) 6085 u_int32_t seq; 6086 { 6087 struct secacq *acq; 6088 6089 LIST_FOREACH(acq, &acqtree, chain) { 6090 if (acq->seq == seq) 6091 return acq; 6092 } 6093 6094 return NULL; 6095 } 6096 #endif 6097 6098 static struct secspacq * 6099 key_newspacq(spidx) 6100 struct secpolicyindex *spidx; 6101 { 6102 struct secspacq *acq; 6103 6104 /* get new entry */ 6105 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6106 if (acq == NULL) { 6107 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6108 return NULL; 6109 } 6110 bzero(acq, sizeof(*acq)); 6111 6112 /* copy secindex */ 6113 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6114 acq->created = time_second; 6115 acq->count = 0; 6116 6117 return acq; 6118 } 6119 6120 static struct secspacq * 6121 key_getspacq(spidx) 6122 struct secpolicyindex *spidx; 6123 { 6124 struct secspacq *acq; 6125 6126 LIST_FOREACH(acq, &spacqtree, chain) { 6127 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6128 return acq; 6129 } 6130 6131 return NULL; 6132 } 6133 6134 /* 6135 * SADB_ACQUIRE processing, 6136 * in first situation, is receiving 6137 * <base> 6138 * from the ikmpd, and clear sequence of its secasvar entry. 6139 * 6140 * In second situation, is receiving 6141 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6142 * from a user land process, and return 6143 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6144 * to the socket. 6145 * 6146 * m will always be freed. 6147 */ 6148 static int 6149 key_acquire2(so, m, mhp) 6150 struct socket *so; 6151 struct mbuf *m; 6152 const struct sadb_msghdr *mhp; 6153 { 6154 const struct sadb_address *src0, *dst0; 6155 struct secasindex saidx; 6156 struct secashead *sah; 6157 u_int16_t proto; 6158 int error; 6159 6160 /* sanity check */ 6161 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6162 panic("key_acquire2: NULL pointer is passed"); 6163 6164 /* 6165 * Error message from KMd. 6166 * We assume that if error was occurred in IKEd, the length of PFKEY 6167 * message is equal to the size of sadb_msg structure. 6168 * We do not raise error even if error occurred in this function. 6169 */ 6170 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6171 #ifndef IPSEC_NONBLOCK_ACQUIRE 6172 struct secacq *acq; 6173 6174 /* check sequence number */ 6175 if (mhp->msg->sadb_msg_seq == 0) { 6176 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6177 m_freem(m); 6178 return 0; 6179 } 6180 6181 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6182 /* 6183 * the specified larval SA is already gone, or we got 6184 * a bogus sequence number. we can silently ignore it. 6185 */ 6186 m_freem(m); 6187 return 0; 6188 } 6189 6190 /* reset acq counter in order to deletion by timehander. */ 6191 acq->created = time_second; 6192 acq->count = 0; 6193 #endif 6194 m_freem(m); 6195 return 0; 6196 } 6197 6198 /* 6199 * This message is from user land. 6200 */ 6201 6202 /* map satype to proto */ 6203 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6204 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6205 return key_senderror(so, m, EINVAL); 6206 } 6207 6208 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6209 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6210 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6211 /* error */ 6212 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6213 return key_senderror(so, m, EINVAL); 6214 } 6215 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6216 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6217 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6218 /* error */ 6219 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6220 return key_senderror(so, m, EINVAL); 6221 } 6222 6223 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6224 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6225 6226 /* XXX boundary check against sa_len */ 6227 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6228 6229 /* get a SA index */ 6230 LIST_FOREACH(sah, &sahtree, chain) { 6231 if (sah->state == SADB_SASTATE_DEAD) 6232 continue; 6233 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6234 break; 6235 } 6236 if (sah != NULL) { 6237 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6238 return key_senderror(so, m, EEXIST); 6239 } 6240 6241 error = key_acquire(&saidx, NULL); 6242 if (error != 0) { 6243 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6244 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6245 return key_senderror(so, m, error); 6246 } 6247 6248 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6249 } 6250 6251 /* 6252 * SADB_REGISTER processing. 6253 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6254 * receive 6255 * <base> 6256 * from the ikmpd, and register a socket to send PF_KEY messages, 6257 * and send 6258 * <base, supported> 6259 * to KMD by PF_KEY. 6260 * If socket is detached, must free from regnode. 6261 * 6262 * m will always be freed. 6263 */ 6264 static int 6265 key_register(so, m, mhp) 6266 struct socket *so; 6267 struct mbuf *m; 6268 const struct sadb_msghdr *mhp; 6269 { 6270 struct secreg *reg, *newreg = 0; 6271 6272 /* sanity check */ 6273 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6274 panic("key_register: NULL pointer is passed"); 6275 6276 /* check for invalid register message */ 6277 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6278 return key_senderror(so, m, EINVAL); 6279 6280 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6281 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6282 goto setmsg; 6283 6284 /* check whether existing or not */ 6285 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6286 if (reg->so == so) { 6287 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6288 return key_senderror(so, m, EEXIST); 6289 } 6290 } 6291 6292 /* create regnode */ 6293 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6294 if (newreg == NULL) { 6295 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6296 return key_senderror(so, m, ENOBUFS); 6297 } 6298 bzero(newreg, sizeof(*newreg)); 6299 6300 newreg->so = so; 6301 ((struct keycb *)sotorawcb(so))->kp_registered++; 6302 6303 /* add regnode to regtree. */ 6304 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6305 6306 setmsg: 6307 { 6308 struct mbuf *n; 6309 struct sadb_msg *newmsg; 6310 struct sadb_supported *sup; 6311 u_int len, alen, elen; 6312 int off; 6313 int i; 6314 struct sadb_alg *alg; 6315 6316 /* create new sadb_msg to reply. */ 6317 alen = 0; 6318 for (i = 1; i <= SADB_AALG_MAX; i++) { 6319 if (ah_algorithm_lookup(i)) 6320 alen += sizeof(struct sadb_alg); 6321 } 6322 if (alen) 6323 alen += sizeof(struct sadb_supported); 6324 elen = 0; 6325 for (i = 1; i <= SADB_EALG_MAX; i++) { 6326 if (esp_algorithm_lookup(i)) 6327 elen += sizeof(struct sadb_alg); 6328 } 6329 if (elen) 6330 elen += sizeof(struct sadb_supported); 6331 6332 len = sizeof(struct sadb_msg) + alen + elen; 6333 6334 if (len > MCLBYTES) 6335 return key_senderror(so, m, ENOBUFS); 6336 6337 MGETHDR(n, M_DONTWAIT, MT_DATA); 6338 if (len > MHLEN) { 6339 MCLGET(n, M_DONTWAIT); 6340 if ((n->m_flags & M_EXT) == 0) { 6341 m_freem(n); 6342 n = NULL; 6343 } 6344 } 6345 if (!n) 6346 return key_senderror(so, m, ENOBUFS); 6347 6348 n->m_pkthdr.len = n->m_len = len; 6349 n->m_next = NULL; 6350 off = 0; 6351 6352 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6353 newmsg = mtod(n, struct sadb_msg *); 6354 newmsg->sadb_msg_errno = 0; 6355 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6356 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6357 6358 /* for authentication algorithm */ 6359 if (alen) { 6360 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6361 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6362 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6363 off += PFKEY_ALIGN8(sizeof(*sup)); 6364 6365 for (i = 1; i <= SADB_AALG_MAX; i++) { 6366 struct auth_hash *aalgo; 6367 u_int16_t minkeysize, maxkeysize; 6368 6369 aalgo = ah_algorithm_lookup(i); 6370 if (!aalgo) 6371 continue; 6372 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6373 alg->sadb_alg_id = i; 6374 alg->sadb_alg_ivlen = 0; 6375 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6376 alg->sadb_alg_minbits = _BITS(minkeysize); 6377 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6378 off += PFKEY_ALIGN8(sizeof(*alg)); 6379 } 6380 } 6381 6382 /* for encryption algorithm */ 6383 if (elen) { 6384 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6385 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6386 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6387 off += PFKEY_ALIGN8(sizeof(*sup)); 6388 6389 for (i = 1; i <= SADB_EALG_MAX; i++) { 6390 struct enc_xform *ealgo; 6391 6392 ealgo = esp_algorithm_lookup(i); 6393 if (!ealgo) 6394 continue; 6395 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6396 alg->sadb_alg_id = i; 6397 alg->sadb_alg_ivlen = ealgo->blocksize; 6398 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6399 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6400 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6401 } 6402 } 6403 6404 #ifdef DIAGNOSTIC 6405 if (off != len) 6406 panic("length assumption failed in key_register"); 6407 #endif 6408 6409 m_freem(m); 6410 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6411 } 6412 } 6413 6414 /* 6415 * free secreg entry registered. 6416 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6417 */ 6418 void 6419 key_freereg(so) 6420 struct socket *so; 6421 { 6422 struct secreg *reg; 6423 int i; 6424 6425 /* sanity check */ 6426 if (so == NULL) 6427 panic("key_freereg: NULL pointer is passed"); 6428 6429 /* 6430 * check whether existing or not. 6431 * check all type of SA, because there is a potential that 6432 * one socket is registered to multiple type of SA. 6433 */ 6434 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6435 LIST_FOREACH(reg, ®tree[i], chain) { 6436 if (reg->so == so 6437 && __LIST_CHAINED(reg)) { 6438 LIST_REMOVE(reg, chain); 6439 KFREE(reg); 6440 break; 6441 } 6442 } 6443 } 6444 6445 return; 6446 } 6447 6448 /* 6449 * SADB_EXPIRE processing 6450 * send 6451 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6452 * to KMD by PF_KEY. 6453 * NOTE: We send only soft lifetime extension. 6454 * 6455 * OUT: 0 : succeed 6456 * others : error number 6457 */ 6458 static int 6459 key_expire(sav) 6460 struct secasvar *sav; 6461 { 6462 int s; 6463 int satype; 6464 struct mbuf *result = NULL, *m; 6465 int len; 6466 int error = -1; 6467 struct sadb_lifetime *lt; 6468 6469 /* XXX: Why do we lock ? */ 6470 s = splsoftnet(); /*called from softclock()*/ 6471 6472 /* sanity check */ 6473 if (sav == NULL) 6474 panic("key_expire: NULL pointer is passed"); 6475 if (sav->sah == NULL) 6476 panic("key_expire: Why was SA index in SA NULL"); 6477 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6478 panic("key_expire: invalid proto is passed"); 6479 6480 /* set msg header */ 6481 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6482 if (!m) { 6483 error = ENOBUFS; 6484 goto fail; 6485 } 6486 result = m; 6487 6488 /* create SA extension */ 6489 m = key_setsadbsa(sav); 6490 if (!m) { 6491 error = ENOBUFS; 6492 goto fail; 6493 } 6494 m_cat(result, m); 6495 6496 /* create SA extension */ 6497 m = key_setsadbxsa2(sav->sah->saidx.mode, 6498 sav->replay ? sav->replay->count : 0, 6499 sav->sah->saidx.reqid); 6500 if (!m) { 6501 error = ENOBUFS; 6502 goto fail; 6503 } 6504 m_cat(result, m); 6505 6506 /* create lifetime extension (current and soft) */ 6507 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6508 m = key_alloc_mbuf(len); 6509 if (!m || m->m_next) { /*XXX*/ 6510 if (m) 6511 m_freem(m); 6512 error = ENOBUFS; 6513 goto fail; 6514 } 6515 bzero(mtod(m, void *), len); 6516 lt = mtod(m, struct sadb_lifetime *); 6517 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6518 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6519 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6520 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6521 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6522 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6523 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6524 bcopy(sav->lft_s, lt, sizeof(*lt)); 6525 m_cat(result, m); 6526 6527 /* set sadb_address for source */ 6528 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6529 &sav->sah->saidx.src.sa, 6530 FULLMASK, IPSEC_ULPROTO_ANY); 6531 if (!m) { 6532 error = ENOBUFS; 6533 goto fail; 6534 } 6535 m_cat(result, m); 6536 6537 /* set sadb_address for destination */ 6538 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6539 &sav->sah->saidx.dst.sa, 6540 FULLMASK, IPSEC_ULPROTO_ANY); 6541 if (!m) { 6542 error = ENOBUFS; 6543 goto fail; 6544 } 6545 m_cat(result, m); 6546 6547 if ((result->m_flags & M_PKTHDR) == 0) { 6548 error = EINVAL; 6549 goto fail; 6550 } 6551 6552 if (result->m_len < sizeof(struct sadb_msg)) { 6553 result = m_pullup(result, sizeof(struct sadb_msg)); 6554 if (result == NULL) { 6555 error = ENOBUFS; 6556 goto fail; 6557 } 6558 } 6559 6560 result->m_pkthdr.len = 0; 6561 for (m = result; m; m = m->m_next) 6562 result->m_pkthdr.len += m->m_len; 6563 6564 mtod(result, struct sadb_msg *)->sadb_msg_len = 6565 PFKEY_UNIT64(result->m_pkthdr.len); 6566 6567 splx(s); 6568 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6569 6570 fail: 6571 if (result) 6572 m_freem(result); 6573 splx(s); 6574 return error; 6575 } 6576 6577 /* 6578 * SADB_FLUSH processing 6579 * receive 6580 * <base> 6581 * from the ikmpd, and free all entries in secastree. 6582 * and send, 6583 * <base> 6584 * to the ikmpd. 6585 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6586 * 6587 * m will always be freed. 6588 */ 6589 static int 6590 key_flush(so, m, mhp) 6591 struct socket *so; 6592 struct mbuf *m; 6593 const struct sadb_msghdr *mhp; 6594 { 6595 struct sadb_msg *newmsg; 6596 struct secashead *sah, *nextsah; 6597 struct secasvar *sav, *nextsav; 6598 u_int16_t proto; 6599 u_int8_t state; 6600 u_int stateidx; 6601 6602 /* sanity check */ 6603 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6604 panic("key_flush: NULL pointer is passed"); 6605 6606 /* map satype to proto */ 6607 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6608 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6609 return key_senderror(so, m, EINVAL); 6610 } 6611 6612 /* no SATYPE specified, i.e. flushing all SA. */ 6613 for (sah = LIST_FIRST(&sahtree); 6614 sah != NULL; 6615 sah = nextsah) { 6616 nextsah = LIST_NEXT(sah, chain); 6617 6618 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6619 && proto != sah->saidx.proto) 6620 continue; 6621 6622 for (stateidx = 0; 6623 stateidx < _ARRAYLEN(saorder_state_alive); 6624 stateidx++) { 6625 state = saorder_state_any[stateidx]; 6626 for (sav = LIST_FIRST(&sah->savtree[state]); 6627 sav != NULL; 6628 sav = nextsav) { 6629 6630 nextsav = LIST_NEXT(sav, chain); 6631 6632 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6633 KEY_FREESAV(&sav); 6634 } 6635 } 6636 6637 sah->state = SADB_SASTATE_DEAD; 6638 } 6639 6640 if (m->m_len < sizeof(struct sadb_msg) || 6641 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6642 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6643 return key_senderror(so, m, ENOBUFS); 6644 } 6645 6646 if (m->m_next) 6647 m_freem(m->m_next); 6648 m->m_next = NULL; 6649 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6650 newmsg = mtod(m, struct sadb_msg *); 6651 newmsg->sadb_msg_errno = 0; 6652 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6653 6654 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6655 } 6656 6657 6658 static struct mbuf * 6659 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6660 { 6661 struct secashead *sah; 6662 struct secasvar *sav; 6663 u_int16_t proto; 6664 u_int stateidx; 6665 u_int8_t satype; 6666 u_int8_t state; 6667 int cnt; 6668 struct mbuf *m, *n, *prev; 6669 int totlen; 6670 6671 *lenp = 0; 6672 6673 /* map satype to proto */ 6674 if ((proto = key_satype2proto(req_satype)) == 0) { 6675 *errorp = EINVAL; 6676 return (NULL); 6677 } 6678 6679 /* count sav entries to be sent to userland. */ 6680 cnt = 0; 6681 LIST_FOREACH(sah, &sahtree, chain) { 6682 if (req_satype != SADB_SATYPE_UNSPEC && 6683 proto != sah->saidx.proto) 6684 continue; 6685 6686 for (stateidx = 0; 6687 stateidx < _ARRAYLEN(saorder_state_any); 6688 stateidx++) { 6689 state = saorder_state_any[stateidx]; 6690 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6691 cnt++; 6692 } 6693 } 6694 } 6695 6696 if (cnt == 0) { 6697 *errorp = ENOENT; 6698 return (NULL); 6699 } 6700 6701 /* send this to the userland, one at a time. */ 6702 m = NULL; 6703 prev = m; 6704 LIST_FOREACH(sah, &sahtree, chain) { 6705 if (req_satype != SADB_SATYPE_UNSPEC && 6706 proto != sah->saidx.proto) 6707 continue; 6708 6709 /* map proto to satype */ 6710 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6711 m_freem(m); 6712 *errorp = EINVAL; 6713 return (NULL); 6714 } 6715 6716 for (stateidx = 0; 6717 stateidx < _ARRAYLEN(saorder_state_any); 6718 stateidx++) { 6719 state = saorder_state_any[stateidx]; 6720 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6721 n = key_setdumpsa(sav, SADB_DUMP, satype, 6722 --cnt, pid); 6723 if (!n) { 6724 m_freem(m); 6725 *errorp = ENOBUFS; 6726 return (NULL); 6727 } 6728 6729 totlen += n->m_pkthdr.len; 6730 if (!m) 6731 m = n; 6732 else 6733 prev->m_nextpkt = n; 6734 prev = n; 6735 } 6736 } 6737 } 6738 6739 if (!m) { 6740 *errorp = EINVAL; 6741 return (NULL); 6742 } 6743 6744 if ((m->m_flags & M_PKTHDR) != 0) { 6745 m->m_pkthdr.len = 0; 6746 for (n = m; n; n = n->m_next) 6747 m->m_pkthdr.len += n->m_len; 6748 } 6749 6750 *errorp = 0; 6751 return (m); 6752 } 6753 6754 /* 6755 * SADB_DUMP processing 6756 * dump all entries including status of DEAD in SAD. 6757 * receive 6758 * <base> 6759 * from the ikmpd, and dump all secasvar leaves 6760 * and send, 6761 * <base> ..... 6762 * to the ikmpd. 6763 * 6764 * m will always be freed. 6765 */ 6766 static int 6767 key_dump(so, m0, mhp) 6768 struct socket *so; 6769 struct mbuf *m0; 6770 const struct sadb_msghdr *mhp; 6771 { 6772 u_int16_t proto; 6773 u_int8_t satype; 6774 struct mbuf *n; 6775 int s; 6776 int error, len, ok; 6777 6778 /* sanity check */ 6779 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 6780 panic("key_dump: NULL pointer is passed"); 6781 6782 /* map satype to proto */ 6783 satype = mhp->msg->sadb_msg_satype; 6784 if ((proto = key_satype2proto(satype)) == 0) { 6785 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 6786 return key_senderror(so, m0, EINVAL); 6787 } 6788 6789 /* 6790 * If the requestor has insufficient socket-buffer space 6791 * for the entire chain, nobody gets any response to the DUMP. 6792 * XXX For now, only the requestor ever gets anything. 6793 * Moreover, if the requestor has any space at all, they receive 6794 * the entire chain, otherwise the request is refused with ENOBUFS. 6795 */ 6796 if (sbspace(&so->so_rcv) <= 0) { 6797 return key_senderror(so, m0, ENOBUFS); 6798 } 6799 6800 s = splsoftnet(); 6801 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 6802 splx(s); 6803 6804 if (n == NULL) { 6805 return key_senderror(so, m0, ENOENT); 6806 } 6807 pfkeystat.in_total++; 6808 pfkeystat.in_bytes += len; 6809 6810 /* 6811 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 6812 * The requestor receives either the entire chain, or an 6813 * error message with ENOBUFS. 6814 * 6815 * sbappendaddrchain() takes the chain of entries, one 6816 * packet-record per SPD entry, prepends the key_src sockaddr 6817 * to each packet-record, links the sockaddr mbufs into a new 6818 * list of records, then appends the entire resulting 6819 * list to the requesting socket. 6820 */ 6821 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 6822 n, SB_PRIO_ONESHOT_OVERFLOW); 6823 6824 if (!ok) { 6825 pfkeystat.in_nomem++; 6826 m_freem(n); 6827 return key_senderror(so, m0, ENOBUFS); 6828 } 6829 6830 m_freem(m0); 6831 return 0; 6832 } 6833 6834 /* 6835 * SADB_X_PROMISC processing 6836 * 6837 * m will always be freed. 6838 */ 6839 static int 6840 key_promisc(so, m, mhp) 6841 struct socket *so; 6842 struct mbuf *m; 6843 const struct sadb_msghdr *mhp; 6844 { 6845 int olen; 6846 6847 /* sanity check */ 6848 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6849 panic("key_promisc: NULL pointer is passed"); 6850 6851 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6852 6853 if (olen < sizeof(struct sadb_msg)) { 6854 #if 1 6855 return key_senderror(so, m, EINVAL); 6856 #else 6857 m_freem(m); 6858 return 0; 6859 #endif 6860 } else if (olen == sizeof(struct sadb_msg)) { 6861 /* enable/disable promisc mode */ 6862 struct keycb *kp; 6863 6864 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6865 return key_senderror(so, m, EINVAL); 6866 mhp->msg->sadb_msg_errno = 0; 6867 switch (mhp->msg->sadb_msg_satype) { 6868 case 0: 6869 case 1: 6870 kp->kp_promisc = mhp->msg->sadb_msg_satype; 6871 break; 6872 default: 6873 return key_senderror(so, m, EINVAL); 6874 } 6875 6876 /* send the original message back to everyone */ 6877 mhp->msg->sadb_msg_errno = 0; 6878 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6879 } else { 6880 /* send packet as is */ 6881 6882 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6883 6884 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6885 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6886 } 6887 } 6888 6889 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6890 const struct sadb_msghdr *)) = { 6891 NULL, /* SADB_RESERVED */ 6892 key_getspi, /* SADB_GETSPI */ 6893 key_update, /* SADB_UPDATE */ 6894 key_add, /* SADB_ADD */ 6895 key_delete, /* SADB_DELETE */ 6896 key_get, /* SADB_GET */ 6897 key_acquire2, /* SADB_ACQUIRE */ 6898 key_register, /* SADB_REGISTER */ 6899 NULL, /* SADB_EXPIRE */ 6900 key_flush, /* SADB_FLUSH */ 6901 key_dump, /* SADB_DUMP */ 6902 key_promisc, /* SADB_X_PROMISC */ 6903 NULL, /* SADB_X_PCHANGE */ 6904 key_spdadd, /* SADB_X_SPDUPDATE */ 6905 key_spdadd, /* SADB_X_SPDADD */ 6906 key_spddelete, /* SADB_X_SPDDELETE */ 6907 key_spdget, /* SADB_X_SPDGET */ 6908 NULL, /* SADB_X_SPDACQUIRE */ 6909 key_spddump, /* SADB_X_SPDDUMP */ 6910 key_spdflush, /* SADB_X_SPDFLUSH */ 6911 key_spdadd, /* SADB_X_SPDSETIDX */ 6912 NULL, /* SADB_X_SPDEXPIRE */ 6913 key_spddelete2, /* SADB_X_SPDDELETE2 */ 6914 NULL, /* SADB_X_NAT_T_NEW_MAPPING */ 6915 }; 6916 6917 /* 6918 * parse sadb_msg buffer to process PFKEYv2, 6919 * and create a data to response if needed. 6920 * I think to be dealed with mbuf directly. 6921 * IN: 6922 * msgp : pointer to pointer to a received buffer pulluped. 6923 * This is rewrited to response. 6924 * so : pointer to socket. 6925 * OUT: 6926 * length for buffer to send to user process. 6927 */ 6928 int 6929 key_parse(m, so) 6930 struct mbuf *m; 6931 struct socket *so; 6932 { 6933 struct sadb_msg *msg; 6934 struct sadb_msghdr mh; 6935 u_int orglen; 6936 int error; 6937 int target; 6938 6939 /* sanity check */ 6940 if (m == NULL || so == NULL) 6941 panic("key_parse: NULL pointer is passed"); 6942 6943 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6944 KEYDEBUG(KEYDEBUG_KEY_DUMP, 6945 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 6946 kdebug_sadb(msg)); 6947 #endif 6948 6949 if (m->m_len < sizeof(struct sadb_msg)) { 6950 m = m_pullup(m, sizeof(struct sadb_msg)); 6951 if (!m) 6952 return ENOBUFS; 6953 } 6954 msg = mtod(m, struct sadb_msg *); 6955 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6956 target = KEY_SENDUP_ONE; 6957 6958 if ((m->m_flags & M_PKTHDR) == 0 || 6959 m->m_pkthdr.len != m->m_pkthdr.len) { 6960 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 6961 pfkeystat.out_invlen++; 6962 error = EINVAL; 6963 goto senderror; 6964 } 6965 6966 if (msg->sadb_msg_version != PF_KEY_V2) { 6967 ipseclog((LOG_DEBUG, 6968 "key_parse: PF_KEY version %u is mismatched.\n", 6969 msg->sadb_msg_version)); 6970 pfkeystat.out_invver++; 6971 error = EINVAL; 6972 goto senderror; 6973 } 6974 6975 if (msg->sadb_msg_type > SADB_MAX) { 6976 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6977 msg->sadb_msg_type)); 6978 pfkeystat.out_invmsgtype++; 6979 error = EINVAL; 6980 goto senderror; 6981 } 6982 6983 /* for old-fashioned code - should be nuked */ 6984 if (m->m_pkthdr.len > MCLBYTES) { 6985 m_freem(m); 6986 return ENOBUFS; 6987 } 6988 if (m->m_next) { 6989 struct mbuf *n; 6990 6991 MGETHDR(n, M_DONTWAIT, MT_DATA); 6992 if (n && m->m_pkthdr.len > MHLEN) { 6993 MCLGET(n, M_DONTWAIT); 6994 if ((n->m_flags & M_EXT) == 0) { 6995 m_free(n); 6996 n = NULL; 6997 } 6998 } 6999 if (!n) { 7000 m_freem(m); 7001 return ENOBUFS; 7002 } 7003 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7004 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7005 n->m_next = NULL; 7006 m_freem(m); 7007 m = n; 7008 } 7009 7010 /* align the mbuf chain so that extensions are in contiguous region. */ 7011 error = key_align(m, &mh); 7012 if (error) 7013 return error; 7014 7015 if (m->m_next) { /*XXX*/ 7016 m_freem(m); 7017 return ENOBUFS; 7018 } 7019 7020 msg = mh.msg; 7021 7022 /* check SA type */ 7023 switch (msg->sadb_msg_satype) { 7024 case SADB_SATYPE_UNSPEC: 7025 switch (msg->sadb_msg_type) { 7026 case SADB_GETSPI: 7027 case SADB_UPDATE: 7028 case SADB_ADD: 7029 case SADB_DELETE: 7030 case SADB_GET: 7031 case SADB_ACQUIRE: 7032 case SADB_EXPIRE: 7033 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7034 "when msg type=%u.\n", msg->sadb_msg_type)); 7035 pfkeystat.out_invsatype++; 7036 error = EINVAL; 7037 goto senderror; 7038 } 7039 break; 7040 case SADB_SATYPE_AH: 7041 case SADB_SATYPE_ESP: 7042 case SADB_X_SATYPE_IPCOMP: 7043 case SADB_X_SATYPE_TCPSIGNATURE: 7044 switch (msg->sadb_msg_type) { 7045 case SADB_X_SPDADD: 7046 case SADB_X_SPDDELETE: 7047 case SADB_X_SPDGET: 7048 case SADB_X_SPDDUMP: 7049 case SADB_X_SPDFLUSH: 7050 case SADB_X_SPDSETIDX: 7051 case SADB_X_SPDUPDATE: 7052 case SADB_X_SPDDELETE2: 7053 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7054 msg->sadb_msg_type)); 7055 pfkeystat.out_invsatype++; 7056 error = EINVAL; 7057 goto senderror; 7058 } 7059 break; 7060 case SADB_SATYPE_RSVP: 7061 case SADB_SATYPE_OSPFV2: 7062 case SADB_SATYPE_RIPV2: 7063 case SADB_SATYPE_MIP: 7064 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7065 msg->sadb_msg_satype)); 7066 pfkeystat.out_invsatype++; 7067 error = EOPNOTSUPP; 7068 goto senderror; 7069 case 1: /* XXX: What does it do? */ 7070 if (msg->sadb_msg_type == SADB_X_PROMISC) 7071 break; 7072 /*FALLTHROUGH*/ 7073 default: 7074 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7075 msg->sadb_msg_satype)); 7076 pfkeystat.out_invsatype++; 7077 error = EINVAL; 7078 goto senderror; 7079 } 7080 7081 /* check field of upper layer protocol and address family */ 7082 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7083 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7084 struct sadb_address *src0, *dst0; 7085 u_int plen; 7086 7087 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7088 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7089 7090 /* check upper layer protocol */ 7091 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7092 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7093 pfkeystat.out_invaddr++; 7094 error = EINVAL; 7095 goto senderror; 7096 } 7097 7098 /* check family */ 7099 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7100 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7101 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7102 pfkeystat.out_invaddr++; 7103 error = EINVAL; 7104 goto senderror; 7105 } 7106 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7107 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7108 ipseclog((LOG_DEBUG, 7109 "key_parse: address struct size mismatched.\n")); 7110 pfkeystat.out_invaddr++; 7111 error = EINVAL; 7112 goto senderror; 7113 } 7114 7115 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7116 case AF_INET: 7117 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7118 sizeof(struct sockaddr_in)) { 7119 pfkeystat.out_invaddr++; 7120 error = EINVAL; 7121 goto senderror; 7122 } 7123 break; 7124 case AF_INET6: 7125 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7126 sizeof(struct sockaddr_in6)) { 7127 pfkeystat.out_invaddr++; 7128 error = EINVAL; 7129 goto senderror; 7130 } 7131 break; 7132 default: 7133 ipseclog((LOG_DEBUG, 7134 "key_parse: unsupported address family.\n")); 7135 pfkeystat.out_invaddr++; 7136 error = EAFNOSUPPORT; 7137 goto senderror; 7138 } 7139 7140 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7141 case AF_INET: 7142 plen = sizeof(struct in_addr) << 3; 7143 break; 7144 case AF_INET6: 7145 plen = sizeof(struct in6_addr) << 3; 7146 break; 7147 default: 7148 plen = 0; /*fool gcc*/ 7149 break; 7150 } 7151 7152 /* check max prefix length */ 7153 if (src0->sadb_address_prefixlen > plen || 7154 dst0->sadb_address_prefixlen > plen) { 7155 ipseclog((LOG_DEBUG, 7156 "key_parse: illegal prefixlen.\n")); 7157 pfkeystat.out_invaddr++; 7158 error = EINVAL; 7159 goto senderror; 7160 } 7161 7162 /* 7163 * prefixlen == 0 is valid because there can be a case when 7164 * all addresses are matched. 7165 */ 7166 } 7167 7168 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7169 key_typesw[msg->sadb_msg_type] == NULL) { 7170 pfkeystat.out_invmsgtype++; 7171 error = EINVAL; 7172 goto senderror; 7173 } 7174 7175 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7176 7177 senderror: 7178 msg->sadb_msg_errno = error; 7179 return key_sendup_mbuf(so, m, target); 7180 } 7181 7182 static int 7183 key_senderror(so, m, code) 7184 struct socket *so; 7185 struct mbuf *m; 7186 int code; 7187 { 7188 struct sadb_msg *msg; 7189 7190 if (m->m_len < sizeof(struct sadb_msg)) 7191 panic("invalid mbuf passed to key_senderror"); 7192 7193 msg = mtod(m, struct sadb_msg *); 7194 msg->sadb_msg_errno = code; 7195 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7196 } 7197 7198 /* 7199 * set the pointer to each header into message buffer. 7200 * m will be freed on error. 7201 * XXX larger-than-MCLBYTES extension? 7202 */ 7203 static int 7204 key_align(m, mhp) 7205 struct mbuf *m; 7206 struct sadb_msghdr *mhp; 7207 { 7208 struct mbuf *n; 7209 struct sadb_ext *ext; 7210 size_t off, end; 7211 int extlen; 7212 int toff; 7213 7214 /* sanity check */ 7215 if (m == NULL || mhp == NULL) 7216 panic("key_align: NULL pointer is passed"); 7217 if (m->m_len < sizeof(struct sadb_msg)) 7218 panic("invalid mbuf passed to key_align"); 7219 7220 /* initialize */ 7221 bzero(mhp, sizeof(*mhp)); 7222 7223 mhp->msg = mtod(m, struct sadb_msg *); 7224 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7225 7226 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7227 extlen = end; /*just in case extlen is not updated*/ 7228 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7229 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7230 if (!n) { 7231 /* m is already freed */ 7232 return ENOBUFS; 7233 } 7234 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7235 7236 /* set pointer */ 7237 switch (ext->sadb_ext_type) { 7238 case SADB_EXT_SA: 7239 case SADB_EXT_ADDRESS_SRC: 7240 case SADB_EXT_ADDRESS_DST: 7241 case SADB_EXT_ADDRESS_PROXY: 7242 case SADB_EXT_LIFETIME_CURRENT: 7243 case SADB_EXT_LIFETIME_HARD: 7244 case SADB_EXT_LIFETIME_SOFT: 7245 case SADB_EXT_KEY_AUTH: 7246 case SADB_EXT_KEY_ENCRYPT: 7247 case SADB_EXT_IDENTITY_SRC: 7248 case SADB_EXT_IDENTITY_DST: 7249 case SADB_EXT_SENSITIVITY: 7250 case SADB_EXT_PROPOSAL: 7251 case SADB_EXT_SUPPORTED_AUTH: 7252 case SADB_EXT_SUPPORTED_ENCRYPT: 7253 case SADB_EXT_SPIRANGE: 7254 case SADB_X_EXT_POLICY: 7255 case SADB_X_EXT_SA2: 7256 /* duplicate check */ 7257 /* 7258 * XXX Are there duplication payloads of either 7259 * KEY_AUTH or KEY_ENCRYPT ? 7260 */ 7261 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7262 ipseclog((LOG_DEBUG, 7263 "key_align: duplicate ext_type %u " 7264 "is passed.\n", ext->sadb_ext_type)); 7265 m_freem(m); 7266 pfkeystat.out_dupext++; 7267 return EINVAL; 7268 } 7269 break; 7270 default: 7271 ipseclog((LOG_DEBUG, 7272 "key_align: invalid ext_type %u is passed.\n", 7273 ext->sadb_ext_type)); 7274 m_freem(m); 7275 pfkeystat.out_invexttype++; 7276 return EINVAL; 7277 } 7278 7279 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7280 7281 if (key_validate_ext(ext, extlen)) { 7282 m_freem(m); 7283 pfkeystat.out_invlen++; 7284 return EINVAL; 7285 } 7286 7287 n = m_pulldown(m, off, extlen, &toff); 7288 if (!n) { 7289 /* m is already freed */ 7290 return ENOBUFS; 7291 } 7292 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7293 7294 mhp->ext[ext->sadb_ext_type] = ext; 7295 mhp->extoff[ext->sadb_ext_type] = off; 7296 mhp->extlen[ext->sadb_ext_type] = extlen; 7297 } 7298 7299 if (off != end) { 7300 m_freem(m); 7301 pfkeystat.out_invlen++; 7302 return EINVAL; 7303 } 7304 7305 return 0; 7306 } 7307 7308 static int 7309 key_validate_ext(ext, len) 7310 const struct sadb_ext *ext; 7311 int len; 7312 { 7313 const struct sockaddr *sa; 7314 enum { NONE, ADDR } checktype = NONE; 7315 int baselen = 0; 7316 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7317 7318 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7319 return EINVAL; 7320 7321 /* if it does not match minimum/maximum length, bail */ 7322 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7323 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7324 return EINVAL; 7325 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7326 return EINVAL; 7327 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7328 return EINVAL; 7329 7330 /* more checks based on sadb_ext_type XXX need more */ 7331 switch (ext->sadb_ext_type) { 7332 case SADB_EXT_ADDRESS_SRC: 7333 case SADB_EXT_ADDRESS_DST: 7334 case SADB_EXT_ADDRESS_PROXY: 7335 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7336 checktype = ADDR; 7337 break; 7338 case SADB_EXT_IDENTITY_SRC: 7339 case SADB_EXT_IDENTITY_DST: 7340 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7341 SADB_X_IDENTTYPE_ADDR) { 7342 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7343 checktype = ADDR; 7344 } else 7345 checktype = NONE; 7346 break; 7347 default: 7348 checktype = NONE; 7349 break; 7350 } 7351 7352 switch (checktype) { 7353 case NONE: 7354 break; 7355 case ADDR: 7356 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7357 if (len < baselen + sal) 7358 return EINVAL; 7359 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7360 return EINVAL; 7361 break; 7362 } 7363 7364 return 0; 7365 } 7366 7367 void 7368 key_init() 7369 { 7370 int i; 7371 7372 callout_init(&key_timehandler_ch); 7373 7374 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7375 LIST_INIT(&sptree[i]); 7376 } 7377 7378 LIST_INIT(&sahtree); 7379 7380 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7381 LIST_INIT(®tree[i]); 7382 } 7383 7384 #ifndef IPSEC_NONBLOCK_ACQUIRE 7385 LIST_INIT(&acqtree); 7386 #endif 7387 LIST_INIT(&spacqtree); 7388 7389 /* system default */ 7390 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7391 ip4_def_policy.refcnt++; /*never reclaim this*/ 7392 7393 7394 #ifndef IPSEC_DEBUG2 7395 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7396 #endif /*IPSEC_DEBUG2*/ 7397 7398 /* initialize key statistics */ 7399 keystat.getspi_count = 1; 7400 7401 printf("IPsec: Initialized Security Association Processing.\n"); 7402 7403 return; 7404 } 7405 7406 /* 7407 * XXX: maybe This function is called after INBOUND IPsec processing. 7408 * 7409 * Special check for tunnel-mode packets. 7410 * We must make some checks for consistency between inner and outer IP header. 7411 * 7412 * xxx more checks to be provided 7413 */ 7414 int 7415 key_checktunnelsanity( 7416 struct secasvar *sav, 7417 u_int family, 7418 void *src, 7419 void *dst 7420 ) 7421 { 7422 /* sanity check */ 7423 if (sav->sah == NULL) 7424 panic("sav->sah == NULL at key_checktunnelsanity"); 7425 7426 /* XXX: check inner IP header */ 7427 7428 return 1; 7429 } 7430 7431 #if 0 7432 #define hostnamelen strlen(hostname) 7433 7434 /* 7435 * Get FQDN for the host. 7436 * If the administrator configured hostname (by hostname(1)) without 7437 * domain name, returns nothing. 7438 */ 7439 static const char * 7440 key_getfqdn() 7441 { 7442 int i; 7443 int hasdot; 7444 static char fqdn[MAXHOSTNAMELEN + 1]; 7445 7446 if (!hostnamelen) 7447 return NULL; 7448 7449 /* check if it comes with domain name. */ 7450 hasdot = 0; 7451 for (i = 0; i < hostnamelen; i++) { 7452 if (hostname[i] == '.') 7453 hasdot++; 7454 } 7455 if (!hasdot) 7456 return NULL; 7457 7458 /* NOTE: hostname may not be NUL-terminated. */ 7459 bzero(fqdn, sizeof(fqdn)); 7460 bcopy(hostname, fqdn, hostnamelen); 7461 fqdn[hostnamelen] = '\0'; 7462 return fqdn; 7463 } 7464 7465 /* 7466 * get username@FQDN for the host/user. 7467 */ 7468 static const char * 7469 key_getuserfqdn() 7470 { 7471 const char *host; 7472 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7473 struct proc *p = curproc; 7474 char *q; 7475 7476 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7477 return NULL; 7478 if (!(host = key_getfqdn())) 7479 return NULL; 7480 7481 /* NOTE: s_login may not be-NUL terminated. */ 7482 bzero(userfqdn, sizeof(userfqdn)); 7483 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7484 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7485 q = userfqdn + strlen(userfqdn); 7486 *q++ = '@'; 7487 bcopy(host, q, strlen(host)); 7488 q += strlen(host); 7489 *q++ = '\0'; 7490 7491 return userfqdn; 7492 } 7493 #endif 7494 7495 /* record data transfer on SA, and update timestamps */ 7496 void 7497 key_sa_recordxfer(sav, m) 7498 struct secasvar *sav; 7499 struct mbuf *m; 7500 { 7501 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7502 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7503 if (!sav->lft_c) 7504 return; 7505 7506 /* 7507 * XXX Currently, there is a difference of bytes size 7508 * between inbound and outbound processing. 7509 */ 7510 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7511 /* to check bytes lifetime is done in key_timehandler(). */ 7512 7513 /* 7514 * We use the number of packets as the unit of 7515 * sadb_lifetime_allocations. We increment the variable 7516 * whenever {esp,ah}_{in,out}put is called. 7517 */ 7518 sav->lft_c->sadb_lifetime_allocations++; 7519 /* XXX check for expires? */ 7520 7521 /* 7522 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7523 * in seconds. HARD and SOFT lifetime are measured by the time 7524 * difference (again in seconds) from sadb_lifetime_usetime. 7525 * 7526 * usetime 7527 * v expire expire 7528 * -----+-----+--------+---> t 7529 * <--------------> HARD 7530 * <-----> SOFT 7531 */ 7532 sav->lft_c->sadb_lifetime_usetime = time_second; 7533 /* XXX check for expires? */ 7534 7535 return; 7536 } 7537 7538 /* dumb version */ 7539 void 7540 key_sa_routechange(dst) 7541 struct sockaddr *dst; 7542 { 7543 struct secashead *sah; 7544 struct route *ro; 7545 7546 LIST_FOREACH(sah, &sahtree, chain) { 7547 ro = &sah->sa_route; 7548 if (dst->sa_len == rtcache_getdst(ro)->sa_len && 7549 memcmp(dst, rtcache_getdst(ro), dst->sa_len) == 0) 7550 rtcache_free(ro); 7551 } 7552 7553 return; 7554 } 7555 7556 static void 7557 key_sa_chgstate(sav, state) 7558 struct secasvar *sav; 7559 u_int8_t state; 7560 { 7561 if (sav == NULL) 7562 panic("key_sa_chgstate called with sav == NULL"); 7563 7564 if (sav->state == state) 7565 return; 7566 7567 if (__LIST_CHAINED(sav)) 7568 LIST_REMOVE(sav, chain); 7569 7570 sav->state = state; 7571 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7572 } 7573 7574 void 7575 key_sa_stir_iv(sav) 7576 struct secasvar *sav; 7577 { 7578 7579 if (!sav->iv) 7580 panic("key_sa_stir_iv called with sav == NULL"); 7581 key_randomfill(sav->iv, sav->ivlen); 7582 } 7583 7584 /* XXX too much? */ 7585 static struct mbuf * 7586 key_alloc_mbuf(l) 7587 int l; 7588 { 7589 struct mbuf *m = NULL, *n; 7590 int len, t; 7591 7592 len = l; 7593 while (len > 0) { 7594 MGET(n, M_DONTWAIT, MT_DATA); 7595 if (n && len > MLEN) 7596 MCLGET(n, M_DONTWAIT); 7597 if (!n) { 7598 m_freem(m); 7599 return NULL; 7600 } 7601 7602 n->m_next = NULL; 7603 n->m_len = 0; 7604 n->m_len = M_TRAILINGSPACE(n); 7605 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7606 if (n->m_len > len) { 7607 t = (n->m_len - len) & ~(sizeof(long) - 1); 7608 n->m_data += t; 7609 n->m_len = len; 7610 } 7611 7612 len -= n->m_len; 7613 7614 if (m) 7615 m_cat(m, n); 7616 else 7617 m = n; 7618 } 7619 7620 return m; 7621 } 7622 7623 static struct mbuf * 7624 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7625 { 7626 struct secashead *sah; 7627 struct secasvar *sav; 7628 u_int16_t proto; 7629 u_int stateidx; 7630 u_int8_t satype; 7631 u_int8_t state; 7632 int cnt; 7633 struct mbuf *m, *n; 7634 7635 /* map satype to proto */ 7636 if ((proto = key_satype2proto(req_satype)) == 0) { 7637 *errorp = EINVAL; 7638 return (NULL); 7639 } 7640 7641 /* count sav entries to be sent to the userland. */ 7642 cnt = 0; 7643 LIST_FOREACH(sah, &sahtree, chain) { 7644 if (req_satype != SADB_SATYPE_UNSPEC && 7645 proto != sah->saidx.proto) 7646 continue; 7647 7648 for (stateidx = 0; 7649 stateidx < _ARRAYLEN(saorder_state_any); 7650 stateidx++) { 7651 state = saorder_state_any[stateidx]; 7652 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7653 cnt++; 7654 } 7655 } 7656 } 7657 7658 if (cnt == 0) { 7659 *errorp = ENOENT; 7660 return (NULL); 7661 } 7662 7663 /* send this to the userland, one at a time. */ 7664 m = NULL; 7665 LIST_FOREACH(sah, &sahtree, chain) { 7666 if (req_satype != SADB_SATYPE_UNSPEC && 7667 proto != sah->saidx.proto) 7668 continue; 7669 7670 /* map proto to satype */ 7671 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7672 m_freem(m); 7673 *errorp = EINVAL; 7674 return (NULL); 7675 } 7676 7677 for (stateidx = 0; 7678 stateidx < _ARRAYLEN(saorder_state_any); 7679 stateidx++) { 7680 state = saorder_state_any[stateidx]; 7681 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7682 n = key_setdumpsa(sav, SADB_DUMP, satype, 7683 --cnt, pid); 7684 if (!n) { 7685 m_freem(m); 7686 *errorp = ENOBUFS; 7687 return (NULL); 7688 } 7689 7690 if (!m) 7691 m = n; 7692 else 7693 m_cat(m, n); 7694 } 7695 } 7696 } 7697 7698 if (!m) { 7699 *errorp = EINVAL; 7700 return (NULL); 7701 } 7702 7703 if ((m->m_flags & M_PKTHDR) != 0) { 7704 m->m_pkthdr.len = 0; 7705 for (n = m; n; n = n->m_next) 7706 m->m_pkthdr.len += n->m_len; 7707 } 7708 7709 *errorp = 0; 7710 return (m); 7711 } 7712 7713 static struct mbuf * 7714 key_setspddump(int *errorp, pid_t pid) 7715 { 7716 struct secpolicy *sp; 7717 int cnt; 7718 u_int dir; 7719 struct mbuf *m, *n; 7720 7721 /* search SPD entry and get buffer size. */ 7722 cnt = 0; 7723 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7724 LIST_FOREACH(sp, &sptree[dir], chain) { 7725 cnt++; 7726 } 7727 } 7728 7729 if (cnt == 0) { 7730 *errorp = ENOENT; 7731 return (NULL); 7732 } 7733 7734 m = NULL; 7735 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7736 LIST_FOREACH(sp, &sptree[dir], chain) { 7737 --cnt; 7738 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7739 7740 if (!n) { 7741 *errorp = ENOBUFS; 7742 m_freem(m); 7743 return (NULL); 7744 } 7745 if (!m) 7746 m = n; 7747 else { 7748 m->m_pkthdr.len += n->m_pkthdr.len; 7749 m_cat(m, n); 7750 } 7751 } 7752 } 7753 7754 *errorp = 0; 7755 return (m); 7756 } 7757 7758 static int 7759 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 7760 { 7761 struct mbuf *m, *n; 7762 int err2 = 0; 7763 char *p, *ep; 7764 size_t len; 7765 int s, error; 7766 7767 if (newp) 7768 return (EPERM); 7769 if (namelen != 1) 7770 return (EINVAL); 7771 7772 s = splsoftnet(); 7773 m = key_setdump(name[0], &error, l->l_proc->p_pid); 7774 splx(s); 7775 if (!m) 7776 return (error); 7777 if (!oldp) 7778 *oldlenp = m->m_pkthdr.len; 7779 else { 7780 p = oldp; 7781 if (*oldlenp < m->m_pkthdr.len) { 7782 err2 = ENOMEM; 7783 ep = p + *oldlenp; 7784 } else { 7785 *oldlenp = m->m_pkthdr.len; 7786 ep = p + m->m_pkthdr.len; 7787 } 7788 for (n = m; n; n = n->m_next) { 7789 len = (ep - p < n->m_len) ? 7790 ep - p : n->m_len; 7791 error = copyout(mtod(n, const void *), p, len); 7792 p += len; 7793 if (error) 7794 break; 7795 } 7796 if (error == 0) 7797 error = err2; 7798 } 7799 m_freem(m); 7800 7801 return (error); 7802 } 7803 7804 static int 7805 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 7806 { 7807 struct mbuf *m, *n; 7808 int err2 = 0; 7809 char *p, *ep; 7810 size_t len; 7811 int s, error; 7812 7813 if (newp) 7814 return (EPERM); 7815 if (namelen != 0) 7816 return (EINVAL); 7817 7818 s = splsoftnet(); 7819 m = key_setspddump(&error, l->l_proc->p_pid); 7820 splx(s); 7821 if (!m) 7822 return (error); 7823 if (!oldp) 7824 *oldlenp = m->m_pkthdr.len; 7825 else { 7826 p = oldp; 7827 if (*oldlenp < m->m_pkthdr.len) { 7828 err2 = ENOMEM; 7829 ep = p + *oldlenp; 7830 } else { 7831 *oldlenp = m->m_pkthdr.len; 7832 ep = p + m->m_pkthdr.len; 7833 } 7834 for (n = m; n; n = n->m_next) { 7835 len = (ep - p < n->m_len) ? 7836 ep - p : n->m_len; 7837 error = copyout(mtod(n, const void *), p, len); 7838 p += len; 7839 if (error) 7840 break; 7841 } 7842 if (error == 0) 7843 error = err2; 7844 } 7845 m_freem(m); 7846 7847 return (error); 7848 } 7849 7850 /* 7851 * Create sysctl tree for native FAST_IPSEC key knobs, originally 7852 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 7853 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 7854 * and in any case the part of our sysctl namespace used for dumping the 7855 * SPD and SA database *HAS* to be compatible with the KAME sysctl 7856 * namespace, for API reasons. 7857 * 7858 * Pending a consensus on the right way to fix this, add a level of 7859 * indirection in how we number the `native' FAST_IPSEC key nodes; 7860 * and (as requested by Andrew Brown) move registration of the 7861 * KAME-compatible names to a separate function. 7862 */ 7863 #if 0 7864 # define FAST_IPSEC_PFKEY PF_KEY_V2 7865 # define FAST_IPSEC_PFKEY_NAME "keyv2" 7866 #else 7867 # define FAST_IPSEC_PFKEY PF_KEY 7868 # define FAST_IPSEC_PFKEY_NAME "key" 7869 #endif 7870 7871 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 7872 { 7873 7874 sysctl_createv(clog, 0, NULL, NULL, 7875 CTLFLAG_PERMANENT, 7876 CTLTYPE_NODE, "net", NULL, 7877 NULL, 0, NULL, 0, 7878 CTL_NET, CTL_EOL); 7879 sysctl_createv(clog, 0, NULL, NULL, 7880 CTLFLAG_PERMANENT, 7881 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 7882 NULL, 0, NULL, 0, 7883 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 7884 7885 sysctl_createv(clog, 0, NULL, NULL, 7886 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7887 CTLTYPE_INT, "debug", NULL, 7888 NULL, 0, &key_debug_level, 0, 7889 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 7890 sysctl_createv(clog, 0, NULL, NULL, 7891 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7892 CTLTYPE_INT, "spi_try", NULL, 7893 NULL, 0, &key_spi_trycnt, 0, 7894 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 7895 sysctl_createv(clog, 0, NULL, NULL, 7896 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7897 CTLTYPE_INT, "spi_min_value", NULL, 7898 NULL, 0, &key_spi_minval, 0, 7899 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 7900 sysctl_createv(clog, 0, NULL, NULL, 7901 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7902 CTLTYPE_INT, "spi_max_value", NULL, 7903 NULL, 0, &key_spi_maxval, 0, 7904 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 7905 sysctl_createv(clog, 0, NULL, NULL, 7906 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7907 CTLTYPE_INT, "random_int", NULL, 7908 NULL, 0, &key_int_random, 0, 7909 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 7910 sysctl_createv(clog, 0, NULL, NULL, 7911 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7912 CTLTYPE_INT, "larval_lifetime", NULL, 7913 NULL, 0, &key_larval_lifetime, 0, 7914 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 7915 sysctl_createv(clog, 0, NULL, NULL, 7916 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7917 CTLTYPE_INT, "blockacq_count", NULL, 7918 NULL, 0, &key_blockacq_count, 0, 7919 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 7920 sysctl_createv(clog, 0, NULL, NULL, 7921 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7922 CTLTYPE_INT, "blockacq_lifetime", NULL, 7923 NULL, 0, &key_blockacq_lifetime, 0, 7924 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 7925 sysctl_createv(clog, 0, NULL, NULL, 7926 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7927 CTLTYPE_INT, "esp_keymin", NULL, 7928 NULL, 0, &ipsec_esp_keymin, 0, 7929 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 7930 sysctl_createv(clog, 0, NULL, NULL, 7931 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7932 CTLTYPE_INT, "prefered_oldsa", NULL, 7933 NULL, 0, &key_prefered_oldsa, 0, 7934 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 7935 sysctl_createv(clog, 0, NULL, NULL, 7936 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7937 CTLTYPE_INT, "esp_auth", NULL, 7938 NULL, 0, &ipsec_esp_auth, 0, 7939 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 7940 sysctl_createv(clog, 0, NULL, NULL, 7941 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7942 CTLTYPE_INT, "ah_keymin", NULL, 7943 NULL, 0, &ipsec_ah_keymin, 0, 7944 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 7945 } 7946 7947 /* 7948 * Register sysctl names used by setkey(8). For historical reasons, 7949 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 7950 * for both FAST_IPSEC and KAME IPSEC. 7951 */ 7952 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 7953 { 7954 7955 /* Make sure net.key exists before we register nodes underneath it. */ 7956 sysctl_createv(clog, 0, NULL, NULL, 7957 CTLFLAG_PERMANENT, 7958 CTLTYPE_NODE, "net", NULL, 7959 NULL, 0, NULL, 0, 7960 CTL_NET, CTL_EOL); 7961 sysctl_createv(clog, 0, NULL, NULL, 7962 CTLFLAG_PERMANENT, 7963 CTLTYPE_NODE, "key", NULL, 7964 NULL, 0, NULL, 0, 7965 CTL_NET, PF_KEY, CTL_EOL); 7966 7967 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 7968 sysctl_createv(clog, 0, NULL, NULL, 7969 CTLFLAG_PERMANENT, 7970 CTLTYPE_STRUCT, "dumpsa", NULL, 7971 sysctl_net_key_dumpsa, 0, NULL, 0, 7972 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 7973 sysctl_createv(clog, 0, NULL, NULL, 7974 CTLFLAG_PERMANENT, 7975 CTLTYPE_STRUCT, "dumpsp", NULL, 7976 sysctl_net_key_dumpsp, 0, NULL, 0, 7977 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 7978 } 7979
Indexes created Tue Sep 23 14:10:03 GMT 2025