key.c revision 1.38
1 /* $NetBSD: key.c,v 1.38 2007/03/04 06:03:29 christos 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 1.38 2007/03/04 06:03:29 christos 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((void *)(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((void *)(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 *)((void *)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 *)((void *)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 void *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 = (void *)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 #endif 1935 #endif /* __NetBSD__ */ 1936 1937 { 1938 struct mbuf *n, *mpolicy; 1939 struct sadb_msg *newmsg; 1940 int off; 1941 1942 /* create new sadb_msg to reply. */ 1943 if (lft) { 1944 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1945 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1946 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1947 } else { 1948 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1949 SADB_X_EXT_POLICY, 1950 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1951 } 1952 if (!n) 1953 return key_senderror(so, m, ENOBUFS); 1954 1955 if (n->m_len < sizeof(*newmsg)) { 1956 n = m_pullup(n, sizeof(*newmsg)); 1957 if (!n) 1958 return key_senderror(so, m, ENOBUFS); 1959 } 1960 newmsg = mtod(n, struct sadb_msg *); 1961 newmsg->sadb_msg_errno = 0; 1962 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1963 1964 off = 0; 1965 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1966 sizeof(*xpl), &off); 1967 if (mpolicy == NULL) { 1968 /* n is already freed */ 1969 return key_senderror(so, m, ENOBUFS); 1970 } 1971 xpl = (struct sadb_x_policy *)(mtod(mpolicy, void *) + off); 1972 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1973 m_freem(n); 1974 return key_senderror(so, m, EINVAL); 1975 } 1976 xpl->sadb_x_policy_id = newsp->id; 1977 1978 m_freem(m); 1979 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1980 } 1981 } 1982 1983 /* 1984 * get new policy id. 1985 * OUT: 1986 * 0: failure. 1987 * others: success. 1988 */ 1989 static u_int32_t 1990 key_getnewspid() 1991 { 1992 u_int32_t newid = 0; 1993 int count = key_spi_trycnt; /* XXX */ 1994 struct secpolicy *sp; 1995 1996 /* when requesting to allocate spi ranged */ 1997 while (count--) { 1998 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 1999 2000 if ((sp = key_getspbyid(newid)) == NULL) 2001 break; 2002 2003 KEY_FREESP(&sp); 2004 } 2005 2006 if (count == 0 || newid == 0) { 2007 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2008 return 0; 2009 } 2010 2011 return newid; 2012 } 2013 2014 /* 2015 * SADB_SPDDELETE processing 2016 * receive 2017 * <base, address(SD), policy(*)> 2018 * from the user(?), and set SADB_SASTATE_DEAD, 2019 * and send, 2020 * <base, address(SD), policy(*)> 2021 * to the ikmpd. 2022 * policy(*) including direction of policy. 2023 * 2024 * m will always be freed. 2025 */ 2026 static int 2027 key_spddelete(so, m, mhp) 2028 struct socket *so; 2029 struct mbuf *m; 2030 const struct sadb_msghdr *mhp; 2031 { 2032 struct sadb_address *src0, *dst0; 2033 struct sadb_x_policy *xpl0; 2034 struct secpolicyindex spidx; 2035 struct secpolicy *sp; 2036 2037 /* sanity check */ 2038 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2039 panic("key_spddelete: NULL pointer is passed"); 2040 2041 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2042 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2043 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2044 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2045 return key_senderror(so, m, EINVAL); 2046 } 2047 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2048 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2049 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2050 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2051 return key_senderror(so, m, EINVAL); 2052 } 2053 2054 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2055 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2056 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2057 2058 /* make secindex */ 2059 /* XXX boundary check against sa_len */ 2060 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2061 src0 + 1, 2062 dst0 + 1, 2063 src0->sadb_address_prefixlen, 2064 dst0->sadb_address_prefixlen, 2065 src0->sadb_address_proto, 2066 &spidx); 2067 2068 /* checking the direciton. */ 2069 switch (xpl0->sadb_x_policy_dir) { 2070 case IPSEC_DIR_INBOUND: 2071 case IPSEC_DIR_OUTBOUND: 2072 break; 2073 default: 2074 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2075 return key_senderror(so, m, EINVAL); 2076 } 2077 2078 /* Is there SP in SPD ? */ 2079 if ((sp = key_getsp(&spidx)) == NULL) { 2080 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2081 return key_senderror(so, m, EINVAL); 2082 } 2083 2084 /* save policy id to buffer to be returned. */ 2085 xpl0->sadb_x_policy_id = sp->id; 2086 2087 key_sp_dead(sp); 2088 key_sp_unlink(sp); /* XXX jrs ordering */ 2089 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2090 2091 #if defined(__NetBSD__) 2092 /* Invalidate all cached SPD pointers in the PCBs. */ 2093 ipsec_invalpcbcacheall(); 2094 2095 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2096 #endif /* __NetBSD__ */ 2097 2098 { 2099 struct mbuf *n; 2100 struct sadb_msg *newmsg; 2101 2102 /* create new sadb_msg to reply. */ 2103 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2104 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2105 if (!n) 2106 return key_senderror(so, m, ENOBUFS); 2107 2108 newmsg = mtod(n, struct sadb_msg *); 2109 newmsg->sadb_msg_errno = 0; 2110 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2111 2112 m_freem(m); 2113 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2114 } 2115 } 2116 2117 /* 2118 * SADB_SPDDELETE2 processing 2119 * receive 2120 * <base, policy(*)> 2121 * from the user(?), and set SADB_SASTATE_DEAD, 2122 * and send, 2123 * <base, policy(*)> 2124 * to the ikmpd. 2125 * policy(*) including direction of policy. 2126 * 2127 * m will always be freed. 2128 */ 2129 static int 2130 key_spddelete2(so, m, mhp) 2131 struct socket *so; 2132 struct mbuf *m; 2133 const struct sadb_msghdr *mhp; 2134 { 2135 u_int32_t id; 2136 struct secpolicy *sp; 2137 2138 /* sanity check */ 2139 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2140 panic("key_spddelete2: NULL pointer is passed"); 2141 2142 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2143 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2144 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2145 key_senderror(so, m, EINVAL); 2146 return 0; 2147 } 2148 2149 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2150 2151 /* Is there SP in SPD ? */ 2152 if ((sp = key_getspbyid(id)) == NULL) { 2153 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2154 key_senderror(so, m, EINVAL); 2155 } 2156 2157 key_sp_dead(sp); 2158 key_sp_unlink(sp); /* XXX jrs ordering */ 2159 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2160 sp = NULL; 2161 2162 #if defined(__NetBSD__) 2163 /* Invalidate all cached SPD pointers in the PCBs. */ 2164 ipsec_invalpcbcacheall(); 2165 2166 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2167 #endif /* __NetBSD__ */ 2168 2169 { 2170 struct mbuf *n, *nn; 2171 struct sadb_msg *newmsg; 2172 int off, len; 2173 2174 /* create new sadb_msg to reply. */ 2175 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2176 2177 if (len > MCLBYTES) 2178 return key_senderror(so, m, ENOBUFS); 2179 MGETHDR(n, M_DONTWAIT, MT_DATA); 2180 if (n && len > MHLEN) { 2181 MCLGET(n, M_DONTWAIT); 2182 if ((n->m_flags & M_EXT) == 0) { 2183 m_freem(n); 2184 n = NULL; 2185 } 2186 } 2187 if (!n) 2188 return key_senderror(so, m, ENOBUFS); 2189 2190 n->m_len = len; 2191 n->m_next = NULL; 2192 off = 0; 2193 2194 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, void *) + off); 2195 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2196 2197 #ifdef DIAGNOSTIC 2198 if (off != len) 2199 panic("length inconsistency in key_spddelete2"); 2200 #endif 2201 2202 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2203 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2204 if (!n->m_next) { 2205 m_freem(n); 2206 return key_senderror(so, m, ENOBUFS); 2207 } 2208 2209 n->m_pkthdr.len = 0; 2210 for (nn = n; nn; nn = nn->m_next) 2211 n->m_pkthdr.len += nn->m_len; 2212 2213 newmsg = mtod(n, struct sadb_msg *); 2214 newmsg->sadb_msg_errno = 0; 2215 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2216 2217 m_freem(m); 2218 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2219 } 2220 } 2221 2222 /* 2223 * SADB_X_GET processing 2224 * receive 2225 * <base, policy(*)> 2226 * from the user(?), 2227 * and send, 2228 * <base, address(SD), policy> 2229 * to the ikmpd. 2230 * policy(*) including direction of policy. 2231 * 2232 * m will always be freed. 2233 */ 2234 static int 2235 key_spdget(so, m, mhp) 2236 struct socket *so; 2237 struct mbuf *m; 2238 const struct sadb_msghdr *mhp; 2239 { 2240 u_int32_t id; 2241 struct secpolicy *sp; 2242 struct mbuf *n; 2243 2244 /* sanity check */ 2245 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2246 panic("key_spdget: NULL pointer is passed"); 2247 2248 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2249 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2250 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2251 return key_senderror(so, m, EINVAL); 2252 } 2253 2254 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2255 2256 /* Is there SP in SPD ? */ 2257 if ((sp = key_getspbyid(id)) == NULL) { 2258 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2259 return key_senderror(so, m, ENOENT); 2260 } 2261 2262 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2263 if (n != NULL) { 2264 m_freem(m); 2265 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2266 } else 2267 return key_senderror(so, m, ENOBUFS); 2268 } 2269 2270 /* 2271 * SADB_X_SPDACQUIRE processing. 2272 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2273 * send 2274 * <base, policy(*)> 2275 * to KMD, and expect to receive 2276 * <base> with SADB_X_SPDACQUIRE if error occurred, 2277 * or 2278 * <base, policy> 2279 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2280 * policy(*) is without policy requests. 2281 * 2282 * 0 : succeed 2283 * others: error number 2284 */ 2285 int 2286 key_spdacquire(sp) 2287 struct secpolicy *sp; 2288 { 2289 struct mbuf *result = NULL, *m; 2290 struct secspacq *newspacq; 2291 int error; 2292 2293 /* sanity check */ 2294 if (sp == NULL) 2295 panic("key_spdacquire: NULL pointer is passed"); 2296 if (sp->req != NULL) 2297 panic("key_spdacquire: called but there is request"); 2298 if (sp->policy != IPSEC_POLICY_IPSEC) 2299 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2300 2301 /* Get an entry to check whether sent message or not. */ 2302 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2303 if (key_blockacq_count < newspacq->count) { 2304 /* reset counter and do send message. */ 2305 newspacq->count = 0; 2306 } else { 2307 /* increment counter and do nothing. */ 2308 newspacq->count++; 2309 return 0; 2310 } 2311 } else { 2312 /* make new entry for blocking to send SADB_ACQUIRE. */ 2313 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2314 return ENOBUFS; 2315 2316 /* add to acqtree */ 2317 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2318 } 2319 2320 /* create new sadb_msg to reply. */ 2321 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2322 if (!m) { 2323 error = ENOBUFS; 2324 goto fail; 2325 } 2326 result = m; 2327 2328 result->m_pkthdr.len = 0; 2329 for (m = result; m; m = m->m_next) 2330 result->m_pkthdr.len += m->m_len; 2331 2332 mtod(result, struct sadb_msg *)->sadb_msg_len = 2333 PFKEY_UNIT64(result->m_pkthdr.len); 2334 2335 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2336 2337 fail: 2338 if (result) 2339 m_freem(result); 2340 return error; 2341 } 2342 2343 /* 2344 * SADB_SPDFLUSH processing 2345 * receive 2346 * <base> 2347 * from the user, and free all entries in secpctree. 2348 * and send, 2349 * <base> 2350 * to the user. 2351 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2352 * 2353 * m will always be freed. 2354 */ 2355 static int 2356 key_spdflush(so, m, mhp) 2357 struct socket *so; 2358 struct mbuf *m; 2359 const struct sadb_msghdr *mhp; 2360 { 2361 struct sadb_msg *newmsg; 2362 struct secpolicy *sp; 2363 u_int dir; 2364 2365 /* sanity check */ 2366 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2367 panic("key_spdflush: NULL pointer is passed"); 2368 2369 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2370 return key_senderror(so, m, EINVAL); 2371 2372 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2373 struct secpolicy * nextsp; 2374 for (sp = LIST_FIRST(&sptree[dir]); 2375 sp != NULL; 2376 sp = nextsp) { 2377 2378 nextsp = LIST_NEXT(sp, chain); 2379 if (sp->state == IPSEC_SPSTATE_DEAD) 2380 continue; 2381 key_sp_dead(sp); 2382 key_sp_unlink(sp); 2383 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2384 continue; 2385 } 2386 } 2387 2388 #if defined(__NetBSD__) 2389 /* Invalidate all cached SPD pointers in the PCBs. */ 2390 ipsec_invalpcbcacheall(); 2391 2392 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2393 #endif /* __NetBSD__ */ 2394 2395 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2396 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2397 return key_senderror(so, m, ENOBUFS); 2398 } 2399 2400 if (m->m_next) 2401 m_freem(m->m_next); 2402 m->m_next = NULL; 2403 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2404 newmsg = mtod(m, struct sadb_msg *); 2405 newmsg->sadb_msg_errno = 0; 2406 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2407 2408 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2409 } 2410 2411 static struct sockaddr key_src = { 2412 .sa_len = 2, 2413 .sa_family = PF_KEY, 2414 }; 2415 2416 static struct mbuf * 2417 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2418 { 2419 struct secpolicy *sp; 2420 int cnt; 2421 u_int dir; 2422 struct mbuf *m, *n, *prev; 2423 int totlen; 2424 2425 *lenp = 0; 2426 2427 /* search SPD entry and get buffer size. */ 2428 cnt = 0; 2429 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2430 LIST_FOREACH(sp, &sptree[dir], chain) { 2431 cnt++; 2432 } 2433 } 2434 2435 if (cnt == 0) { 2436 *errorp = ENOENT; 2437 return (NULL); 2438 } 2439 2440 m = NULL; 2441 prev = m; 2442 totlen = 0; 2443 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2444 LIST_FOREACH(sp, &sptree[dir], chain) { 2445 --cnt; 2446 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2447 2448 if (!n) { 2449 *errorp = ENOBUFS; 2450 if (m) m_freem(m); 2451 return (NULL); 2452 } 2453 2454 totlen += n->m_pkthdr.len; 2455 if (!m) { 2456 m = n; 2457 } else { 2458 prev->m_nextpkt = n; 2459 } 2460 prev = n; 2461 } 2462 } 2463 2464 *lenp = totlen; 2465 *errorp = 0; 2466 return (m); 2467 } 2468 2469 /* 2470 * SADB_SPDDUMP processing 2471 * receive 2472 * <base> 2473 * from the user, and dump all SP leaves 2474 * and send, 2475 * <base> ..... 2476 * to the ikmpd. 2477 * 2478 * m will always be freed. 2479 */ 2480 static int 2481 key_spddump(so, m0, mhp) 2482 struct socket *so; 2483 struct mbuf *m0; 2484 const struct sadb_msghdr *mhp; 2485 { 2486 struct mbuf *n; 2487 int error, len; 2488 int ok, s; 2489 pid_t pid; 2490 2491 /* sanity check */ 2492 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2493 panic("key_spddump: NULL pointer is passed"); 2494 2495 2496 pid = mhp->msg->sadb_msg_pid; 2497 /* 2498 * If the requestor has insufficient socket-buffer space 2499 * for the entire chain, nobody gets any response to the DUMP. 2500 * XXX For now, only the requestor ever gets anything. 2501 * Moreover, if the requestor has any space at all, they receive 2502 * the entire chain, otherwise the request is refused with ENOBUFS. 2503 */ 2504 if (sbspace(&so->so_rcv) <= 0) { 2505 return key_senderror(so, m0, ENOBUFS); 2506 } 2507 2508 s = splsoftnet(); 2509 n = key_setspddump_chain(&error, &len, pid); 2510 splx(s); 2511 2512 if (n == NULL) { 2513 return key_senderror(so, m0, ENOENT); 2514 } 2515 pfkeystat.in_total++; 2516 pfkeystat.in_bytes += len; 2517 2518 /* 2519 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2520 * The requestor receives either the entire chain, or an 2521 * error message with ENOBUFS. 2522 */ 2523 2524 /* 2525 * sbappendchainwith record takes the chain of entries, one 2526 * packet-record per SPD entry, prepends the key_src sockaddr 2527 * to each packet-record, links the sockaddr mbufs into a new 2528 * list of records, then appends the entire resulting 2529 * list to the requesting socket. 2530 */ 2531 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2532 n, SB_PRIO_ONESHOT_OVERFLOW); 2533 2534 if (!ok) { 2535 pfkeystat.in_nomem++; 2536 m_freem(n); 2537 return key_senderror(so, m0, ENOBUFS); 2538 } 2539 2540 m_freem(m0); 2541 return error; 2542 } 2543 2544 static struct mbuf * 2545 key_setdumpsp(sp, type, seq, pid) 2546 struct secpolicy *sp; 2547 u_int8_t type; 2548 u_int32_t seq; 2549 pid_t pid; 2550 { 2551 struct mbuf *result = NULL, *m; 2552 2553 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2554 if (!m) 2555 goto fail; 2556 result = m; 2557 2558 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2559 &sp->spidx.src.sa, sp->spidx.prefs, 2560 sp->spidx.ul_proto); 2561 if (!m) 2562 goto fail; 2563 m_cat(result, m); 2564 2565 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2566 &sp->spidx.dst.sa, sp->spidx.prefd, 2567 sp->spidx.ul_proto); 2568 if (!m) 2569 goto fail; 2570 m_cat(result, m); 2571 2572 m = key_sp2msg(sp); 2573 if (!m) 2574 goto fail; 2575 m_cat(result, m); 2576 2577 if ((result->m_flags & M_PKTHDR) == 0) 2578 goto fail; 2579 2580 if (result->m_len < sizeof(struct sadb_msg)) { 2581 result = m_pullup(result, sizeof(struct sadb_msg)); 2582 if (result == NULL) 2583 goto fail; 2584 } 2585 2586 result->m_pkthdr.len = 0; 2587 for (m = result; m; m = m->m_next) 2588 result->m_pkthdr.len += m->m_len; 2589 2590 mtod(result, struct sadb_msg *)->sadb_msg_len = 2591 PFKEY_UNIT64(result->m_pkthdr.len); 2592 2593 return result; 2594 2595 fail: 2596 m_freem(result); 2597 return NULL; 2598 } 2599 2600 /* 2601 * get PFKEY message length for security policy and request. 2602 */ 2603 static u_int 2604 key_getspreqmsglen(sp) 2605 struct secpolicy *sp; 2606 { 2607 u_int tlen; 2608 2609 tlen = sizeof(struct sadb_x_policy); 2610 2611 /* if is the policy for ipsec ? */ 2612 if (sp->policy != IPSEC_POLICY_IPSEC) 2613 return tlen; 2614 2615 /* get length of ipsec requests */ 2616 { 2617 struct ipsecrequest *isr; 2618 int len; 2619 2620 for (isr = sp->req; isr != NULL; isr = isr->next) { 2621 len = sizeof(struct sadb_x_ipsecrequest) 2622 + isr->saidx.src.sa.sa_len 2623 + isr->saidx.dst.sa.sa_len; 2624 2625 tlen += PFKEY_ALIGN8(len); 2626 } 2627 } 2628 2629 return tlen; 2630 } 2631 2632 /* 2633 * SADB_SPDEXPIRE processing 2634 * send 2635 * <base, address(SD), lifetime(CH), policy> 2636 * to KMD by PF_KEY. 2637 * 2638 * OUT: 0 : succeed 2639 * others : error number 2640 */ 2641 static int 2642 key_spdexpire(sp) 2643 struct secpolicy *sp; 2644 { 2645 int s; 2646 struct mbuf *result = NULL, *m; 2647 int len; 2648 int error = -1; 2649 struct sadb_lifetime *lt; 2650 2651 /* XXX: Why do we lock ? */ 2652 s = splsoftnet(); /*called from softclock()*/ 2653 2654 /* sanity check */ 2655 if (sp == NULL) 2656 panic("key_spdexpire: NULL pointer is passed"); 2657 2658 /* set msg header */ 2659 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2660 if (!m) { 2661 error = ENOBUFS; 2662 goto fail; 2663 } 2664 result = m; 2665 2666 /* create lifetime extension (current and hard) */ 2667 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2668 m = key_alloc_mbuf(len); 2669 if (!m || m->m_next) { /*XXX*/ 2670 if (m) 2671 m_freem(m); 2672 error = ENOBUFS; 2673 goto fail; 2674 } 2675 bzero(mtod(m, void *), len); 2676 lt = mtod(m, struct sadb_lifetime *); 2677 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2678 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2679 lt->sadb_lifetime_allocations = 0; 2680 lt->sadb_lifetime_bytes = 0; 2681 lt->sadb_lifetime_addtime = sp->created; 2682 lt->sadb_lifetime_usetime = sp->lastused; 2683 lt = (struct sadb_lifetime *)(mtod(m, void *) + len / 2); 2684 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2685 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2686 lt->sadb_lifetime_allocations = 0; 2687 lt->sadb_lifetime_bytes = 0; 2688 lt->sadb_lifetime_addtime = sp->lifetime; 2689 lt->sadb_lifetime_usetime = sp->validtime; 2690 m_cat(result, m); 2691 2692 /* set sadb_address for source */ 2693 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2694 &sp->spidx.src.sa, 2695 sp->spidx.prefs, sp->spidx.ul_proto); 2696 if (!m) { 2697 error = ENOBUFS; 2698 goto fail; 2699 } 2700 m_cat(result, m); 2701 2702 /* set sadb_address for destination */ 2703 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2704 &sp->spidx.dst.sa, 2705 sp->spidx.prefd, sp->spidx.ul_proto); 2706 if (!m) { 2707 error = ENOBUFS; 2708 goto fail; 2709 } 2710 m_cat(result, m); 2711 2712 /* set secpolicy */ 2713 m = key_sp2msg(sp); 2714 if (!m) { 2715 error = ENOBUFS; 2716 goto fail; 2717 } 2718 m_cat(result, m); 2719 2720 if ((result->m_flags & M_PKTHDR) == 0) { 2721 error = EINVAL; 2722 goto fail; 2723 } 2724 2725 if (result->m_len < sizeof(struct sadb_msg)) { 2726 result = m_pullup(result, sizeof(struct sadb_msg)); 2727 if (result == NULL) { 2728 error = ENOBUFS; 2729 goto fail; 2730 } 2731 } 2732 2733 result->m_pkthdr.len = 0; 2734 for (m = result; m; m = m->m_next) 2735 result->m_pkthdr.len += m->m_len; 2736 2737 mtod(result, struct sadb_msg *)->sadb_msg_len = 2738 PFKEY_UNIT64(result->m_pkthdr.len); 2739 2740 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2741 2742 fail: 2743 if (result) 2744 m_freem(result); 2745 splx(s); 2746 return error; 2747 } 2748 2749 /* %%% SAD management */ 2750 /* 2751 * allocating a memory for new SA head, and copy from the values of mhp. 2752 * OUT: NULL : failure due to the lack of memory. 2753 * others : pointer to new SA head. 2754 */ 2755 static struct secashead * 2756 key_newsah(saidx) 2757 struct secasindex *saidx; 2758 { 2759 struct secashead *newsah; 2760 2761 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2762 2763 newsah = (struct secashead *) 2764 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2765 if (newsah != NULL) { 2766 int i; 2767 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2768 LIST_INIT(&newsah->savtree[i]); 2769 newsah->saidx = *saidx; 2770 2771 /* add to saidxtree */ 2772 newsah->state = SADB_SASTATE_MATURE; 2773 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2774 } 2775 return(newsah); 2776 } 2777 2778 /* 2779 * delete SA index and all SA registerd. 2780 */ 2781 static void 2782 key_delsah(sah) 2783 struct secashead *sah; 2784 { 2785 struct secasvar *sav, *nextsav; 2786 u_int stateidx, state; 2787 int s; 2788 int zombie = 0; 2789 2790 /* sanity check */ 2791 if (sah == NULL) 2792 panic("key_delsah: NULL pointer is passed"); 2793 2794 s = splsoftnet(); /*called from softclock()*/ 2795 2796 /* searching all SA registerd in the secindex. */ 2797 for (stateidx = 0; 2798 stateidx < _ARRAYLEN(saorder_state_any); 2799 stateidx++) { 2800 2801 state = saorder_state_any[stateidx]; 2802 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2803 sav != NULL; 2804 sav = nextsav) { 2805 2806 nextsav = LIST_NEXT(sav, chain); 2807 2808 if (sav->refcnt == 0) { 2809 /* sanity check */ 2810 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2811 KEY_FREESAV(&sav); 2812 } else { 2813 /* give up to delete this sa */ 2814 zombie++; 2815 } 2816 } 2817 } 2818 2819 /* don't delete sah only if there are savs. */ 2820 if (zombie) { 2821 splx(s); 2822 return; 2823 } 2824 2825 rtcache_free(&sah->sa_route); 2826 2827 /* remove from tree of SA index */ 2828 if (__LIST_CHAINED(sah)) 2829 LIST_REMOVE(sah, chain); 2830 2831 KFREE(sah); 2832 2833 splx(s); 2834 return; 2835 } 2836 2837 /* 2838 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2839 * and copy the values of mhp into new buffer. 2840 * When SAD message type is GETSPI: 2841 * to set sequence number from acq_seq++, 2842 * to set zero to SPI. 2843 * not to call key_setsava(). 2844 * OUT: NULL : fail 2845 * others : pointer to new secasvar. 2846 * 2847 * does not modify mbuf. does not free mbuf on error. 2848 */ 2849 static struct secasvar * 2850 key_newsav(m, mhp, sah, errp, where, tag) 2851 struct mbuf *m; 2852 const struct sadb_msghdr *mhp; 2853 struct secashead *sah; 2854 int *errp; 2855 const char* where; 2856 int tag; 2857 { 2858 struct secasvar *newsav; 2859 const struct sadb_sa *xsa; 2860 2861 /* sanity check */ 2862 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2863 panic("key_newsa: NULL pointer is passed"); 2864 2865 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2866 if (newsav == NULL) { 2867 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2868 *errp = ENOBUFS; 2869 goto done; 2870 } 2871 bzero((void *)newsav, sizeof(struct secasvar)); 2872 2873 switch (mhp->msg->sadb_msg_type) { 2874 case SADB_GETSPI: 2875 newsav->spi = 0; 2876 2877 #ifdef IPSEC_DOSEQCHECK 2878 /* sync sequence number */ 2879 if (mhp->msg->sadb_msg_seq == 0) 2880 newsav->seq = 2881 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2882 else 2883 #endif 2884 newsav->seq = mhp->msg->sadb_msg_seq; 2885 break; 2886 2887 case SADB_ADD: 2888 /* sanity check */ 2889 if (mhp->ext[SADB_EXT_SA] == NULL) { 2890 KFREE(newsav), newsav = NULL; 2891 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2892 *errp = EINVAL; 2893 goto done; 2894 } 2895 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2896 newsav->spi = xsa->sadb_sa_spi; 2897 newsav->seq = mhp->msg->sadb_msg_seq; 2898 break; 2899 default: 2900 KFREE(newsav), newsav = NULL; 2901 *errp = EINVAL; 2902 goto done; 2903 } 2904 2905 /* copy sav values */ 2906 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2907 *errp = key_setsaval(newsav, m, mhp); 2908 if (*errp) { 2909 KFREE(newsav), newsav = NULL; 2910 goto done; 2911 } 2912 } 2913 2914 /* reset created */ 2915 newsav->created = time_second; 2916 newsav->pid = mhp->msg->sadb_msg_pid; 2917 2918 /* add to satree */ 2919 newsav->sah = sah; 2920 newsav->refcnt = 1; 2921 newsav->state = SADB_SASTATE_LARVAL; 2922 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2923 secasvar, chain); 2924 done: 2925 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2926 printf("DP key_newsav from %s:%u return SP:%p\n", 2927 where, tag, newsav)); 2928 2929 return newsav; 2930 } 2931 2932 /* 2933 * free() SA variable entry. 2934 */ 2935 static void 2936 key_delsav(sav) 2937 struct secasvar *sav; 2938 { 2939 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 2940 IPSEC_ASSERT(sav->refcnt == 0, 2941 ("key_delsav: reference count %u > 0", sav->refcnt)); 2942 2943 /* remove from SA header */ 2944 if (__LIST_CHAINED(sav)) 2945 LIST_REMOVE(sav, chain); 2946 2947 /* 2948 * Cleanup xform state. Note that zeroize'ing causes the 2949 * keys to be cleared; otherwise we must do it ourself. 2950 */ 2951 if (sav->tdb_xform != NULL) { 2952 sav->tdb_xform->xf_zeroize(sav); 2953 sav->tdb_xform = NULL; 2954 } else { 2955 if (sav->key_auth != NULL) 2956 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 2957 if (sav->key_enc != NULL) 2958 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 2959 } 2960 if (sav->key_auth != NULL) { 2961 KFREE(sav->key_auth); 2962 sav->key_auth = NULL; 2963 } 2964 if (sav->key_enc != NULL) { 2965 KFREE(sav->key_enc); 2966 sav->key_enc = NULL; 2967 } 2968 if (sav->sched) { 2969 bzero(sav->sched, sav->schedlen); 2970 KFREE(sav->sched); 2971 sav->sched = NULL; 2972 } 2973 if (sav->replay != NULL) { 2974 KFREE(sav->replay); 2975 sav->replay = NULL; 2976 } 2977 if (sav->lft_c != NULL) { 2978 KFREE(sav->lft_c); 2979 sav->lft_c = NULL; 2980 } 2981 if (sav->lft_h != NULL) { 2982 KFREE(sav->lft_h); 2983 sav->lft_h = NULL; 2984 } 2985 if (sav->lft_s != NULL) { 2986 KFREE(sav->lft_s); 2987 sav->lft_s = NULL; 2988 } 2989 if (sav->iv != NULL) { 2990 KFREE(sav->iv); 2991 sav->iv = NULL; 2992 } 2993 2994 KFREE(sav); 2995 2996 return; 2997 } 2998 2999 /* 3000 * search SAD. 3001 * OUT: 3002 * NULL : not found 3003 * others : found, pointer to a SA. 3004 */ 3005 static struct secashead * 3006 key_getsah(saidx) 3007 struct secasindex *saidx; 3008 { 3009 struct secashead *sah; 3010 3011 LIST_FOREACH(sah, &sahtree, chain) { 3012 if (sah->state == SADB_SASTATE_DEAD) 3013 continue; 3014 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3015 return sah; 3016 } 3017 3018 return NULL; 3019 } 3020 3021 /* 3022 * check not to be duplicated SPI. 3023 * NOTE: this function is too slow due to searching all SAD. 3024 * OUT: 3025 * NULL : not found 3026 * others : found, pointer to a SA. 3027 */ 3028 static struct secasvar * 3029 key_checkspidup(saidx, spi) 3030 struct secasindex *saidx; 3031 u_int32_t spi; 3032 { 3033 struct secashead *sah; 3034 struct secasvar *sav; 3035 3036 /* check address family */ 3037 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3038 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3039 return NULL; 3040 } 3041 3042 /* check all SAD */ 3043 LIST_FOREACH(sah, &sahtree, chain) { 3044 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3045 continue; 3046 sav = key_getsavbyspi(sah, spi); 3047 if (sav != NULL) 3048 return sav; 3049 } 3050 3051 return NULL; 3052 } 3053 3054 /* 3055 * search SAD litmited alive SA, protocol, SPI. 3056 * OUT: 3057 * NULL : not found 3058 * others : found, pointer to a SA. 3059 */ 3060 static struct secasvar * 3061 key_getsavbyspi(sah, spi) 3062 struct secashead *sah; 3063 u_int32_t spi; 3064 { 3065 struct secasvar *sav; 3066 u_int stateidx, state; 3067 3068 /* search all status */ 3069 for (stateidx = 0; 3070 stateidx < _ARRAYLEN(saorder_state_alive); 3071 stateidx++) { 3072 3073 state = saorder_state_alive[stateidx]; 3074 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3075 3076 /* sanity check */ 3077 if (sav->state != state) { 3078 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3079 "invalid sav->state (queue: %d SA: %d)\n", 3080 state, sav->state)); 3081 continue; 3082 } 3083 3084 if (sav->spi == spi) 3085 return sav; 3086 } 3087 } 3088 3089 return NULL; 3090 } 3091 3092 /* 3093 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3094 * You must update these if need. 3095 * OUT: 0: success. 3096 * !0: failure. 3097 * 3098 * does not modify mbuf. does not free mbuf on error. 3099 */ 3100 static int 3101 key_setsaval(sav, m, mhp) 3102 struct secasvar *sav; 3103 struct mbuf *m; 3104 const struct sadb_msghdr *mhp; 3105 { 3106 int error = 0; 3107 3108 /* sanity check */ 3109 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3110 panic("key_setsaval: NULL pointer is passed"); 3111 3112 /* initialization */ 3113 sav->replay = NULL; 3114 sav->key_auth = NULL; 3115 sav->key_enc = NULL; 3116 sav->sched = NULL; 3117 sav->schedlen = 0; 3118 sav->iv = NULL; 3119 sav->lft_c = NULL; 3120 sav->lft_h = NULL; 3121 sav->lft_s = NULL; 3122 sav->tdb_xform = NULL; /* transform */ 3123 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3124 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3125 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3126 3127 /* SA */ 3128 if (mhp->ext[SADB_EXT_SA] != NULL) { 3129 const struct sadb_sa *sa0; 3130 3131 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3132 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3133 error = EINVAL; 3134 goto fail; 3135 } 3136 3137 sav->alg_auth = sa0->sadb_sa_auth; 3138 sav->alg_enc = sa0->sadb_sa_encrypt; 3139 sav->flags = sa0->sadb_sa_flags; 3140 3141 /* replay window */ 3142 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3143 sav->replay = (struct secreplay *) 3144 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3145 if (sav->replay == NULL) { 3146 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3147 error = ENOBUFS; 3148 goto fail; 3149 } 3150 if (sa0->sadb_sa_replay != 0) 3151 sav->replay->bitmap = (void *)(sav->replay+1); 3152 sav->replay->wsize = sa0->sadb_sa_replay; 3153 } 3154 } 3155 3156 /* Authentication keys */ 3157 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3158 const struct sadb_key *key0; 3159 int len; 3160 3161 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3162 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3163 3164 error = 0; 3165 if (len < sizeof(*key0)) { 3166 error = EINVAL; 3167 goto fail; 3168 } 3169 switch (mhp->msg->sadb_msg_satype) { 3170 case SADB_SATYPE_AH: 3171 case SADB_SATYPE_ESP: 3172 case SADB_X_SATYPE_TCPSIGNATURE: 3173 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3174 sav->alg_auth != SADB_X_AALG_NULL) 3175 error = EINVAL; 3176 break; 3177 case SADB_X_SATYPE_IPCOMP: 3178 default: 3179 error = EINVAL; 3180 break; 3181 } 3182 if (error) { 3183 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3184 goto fail; 3185 } 3186 3187 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3188 if (sav->key_auth == NULL) { 3189 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3190 error = ENOBUFS; 3191 goto fail; 3192 } 3193 } 3194 3195 /* Encryption key */ 3196 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3197 const struct sadb_key *key0; 3198 int len; 3199 3200 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3201 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3202 3203 error = 0; 3204 if (len < sizeof(*key0)) { 3205 error = EINVAL; 3206 goto fail; 3207 } 3208 switch (mhp->msg->sadb_msg_satype) { 3209 case SADB_SATYPE_ESP: 3210 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3211 sav->alg_enc != SADB_EALG_NULL) { 3212 error = EINVAL; 3213 break; 3214 } 3215 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3216 if (sav->key_enc == NULL) { 3217 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3218 error = ENOBUFS; 3219 goto fail; 3220 } 3221 break; 3222 case SADB_X_SATYPE_IPCOMP: 3223 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3224 error = EINVAL; 3225 sav->key_enc = NULL; /*just in case*/ 3226 break; 3227 case SADB_SATYPE_AH: 3228 case SADB_X_SATYPE_TCPSIGNATURE: 3229 default: 3230 error = EINVAL; 3231 break; 3232 } 3233 if (error) { 3234 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3235 goto fail; 3236 } 3237 } 3238 3239 /* set iv */ 3240 sav->ivlen = 0; 3241 3242 switch (mhp->msg->sadb_msg_satype) { 3243 case SADB_SATYPE_AH: 3244 error = xform_init(sav, XF_AH); 3245 break; 3246 case SADB_SATYPE_ESP: 3247 error = xform_init(sav, XF_ESP); 3248 break; 3249 case SADB_X_SATYPE_IPCOMP: 3250 error = xform_init(sav, XF_IPCOMP); 3251 break; 3252 case SADB_X_SATYPE_TCPSIGNATURE: 3253 error = xform_init(sav, XF_TCPSIGNATURE); 3254 break; 3255 } 3256 if (error) { 3257 ipseclog((LOG_DEBUG, 3258 "key_setsaval: unable to initialize SA type %u.\n", 3259 mhp->msg->sadb_msg_satype)); 3260 goto fail; 3261 } 3262 3263 /* reset created */ 3264 sav->created = time_second; 3265 3266 /* make lifetime for CURRENT */ 3267 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3268 sizeof(struct sadb_lifetime)); 3269 if (sav->lft_c == NULL) { 3270 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3271 error = ENOBUFS; 3272 goto fail; 3273 } 3274 3275 sav->lft_c->sadb_lifetime_len = 3276 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3277 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3278 sav->lft_c->sadb_lifetime_allocations = 0; 3279 sav->lft_c->sadb_lifetime_bytes = 0; 3280 sav->lft_c->sadb_lifetime_addtime = time_second; 3281 sav->lft_c->sadb_lifetime_usetime = 0; 3282 3283 /* lifetimes for HARD and SOFT */ 3284 { 3285 const struct sadb_lifetime *lft0; 3286 3287 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3288 if (lft0 != NULL) { 3289 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3290 error = EINVAL; 3291 goto fail; 3292 } 3293 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3294 sizeof(*lft0)); 3295 if (sav->lft_h == NULL) { 3296 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3297 error = ENOBUFS; 3298 goto fail; 3299 } 3300 /* to be initialize ? */ 3301 } 3302 3303 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3304 if (lft0 != NULL) { 3305 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3306 error = EINVAL; 3307 goto fail; 3308 } 3309 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3310 sizeof(*lft0)); 3311 if (sav->lft_s == NULL) { 3312 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3313 error = ENOBUFS; 3314 goto fail; 3315 } 3316 /* to be initialize ? */ 3317 } 3318 } 3319 3320 return 0; 3321 3322 fail: 3323 /* initialization */ 3324 if (sav->replay != NULL) { 3325 KFREE(sav->replay); 3326 sav->replay = NULL; 3327 } 3328 if (sav->key_auth != NULL) { 3329 KFREE(sav->key_auth); 3330 sav->key_auth = NULL; 3331 } 3332 if (sav->key_enc != NULL) { 3333 KFREE(sav->key_enc); 3334 sav->key_enc = NULL; 3335 } 3336 if (sav->sched) { 3337 KFREE(sav->sched); 3338 sav->sched = NULL; 3339 } 3340 if (sav->iv != NULL) { 3341 KFREE(sav->iv); 3342 sav->iv = NULL; 3343 } 3344 if (sav->lft_c != NULL) { 3345 KFREE(sav->lft_c); 3346 sav->lft_c = NULL; 3347 } 3348 if (sav->lft_h != NULL) { 3349 KFREE(sav->lft_h); 3350 sav->lft_h = NULL; 3351 } 3352 if (sav->lft_s != NULL) { 3353 KFREE(sav->lft_s); 3354 sav->lft_s = NULL; 3355 } 3356 3357 return error; 3358 } 3359 3360 /* 3361 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3362 * OUT: 0: valid 3363 * other: errno 3364 */ 3365 static int 3366 key_mature(sav) 3367 struct secasvar *sav; 3368 { 3369 int error; 3370 3371 /* check SPI value */ 3372 switch (sav->sah->saidx.proto) { 3373 case IPPROTO_ESP: 3374 case IPPROTO_AH: 3375 if (ntohl(sav->spi) <= 255) { 3376 ipseclog((LOG_DEBUG, 3377 "key_mature: illegal range of SPI %u.\n", 3378 (u_int32_t)ntohl(sav->spi))); 3379 return EINVAL; 3380 } 3381 break; 3382 } 3383 3384 /* check satype */ 3385 switch (sav->sah->saidx.proto) { 3386 case IPPROTO_ESP: 3387 /* check flags */ 3388 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3389 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3390 ipseclog((LOG_DEBUG, "key_mature: " 3391 "invalid flag (derived) given to old-esp.\n")); 3392 return EINVAL; 3393 } 3394 error = xform_init(sav, XF_ESP); 3395 break; 3396 case IPPROTO_AH: 3397 /* check flags */ 3398 if (sav->flags & SADB_X_EXT_DERIV) { 3399 ipseclog((LOG_DEBUG, "key_mature: " 3400 "invalid flag (derived) given to AH SA.\n")); 3401 return EINVAL; 3402 } 3403 if (sav->alg_enc != SADB_EALG_NONE) { 3404 ipseclog((LOG_DEBUG, "key_mature: " 3405 "protocol and algorithm mismated.\n")); 3406 return(EINVAL); 3407 } 3408 error = xform_init(sav, XF_AH); 3409 break; 3410 case IPPROTO_IPCOMP: 3411 if (sav->alg_auth != SADB_AALG_NONE) { 3412 ipseclog((LOG_DEBUG, "key_mature: " 3413 "protocol and algorithm mismated.\n")); 3414 return(EINVAL); 3415 } 3416 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3417 && ntohl(sav->spi) >= 0x10000) { 3418 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3419 return(EINVAL); 3420 } 3421 error = xform_init(sav, XF_IPCOMP); 3422 break; 3423 case IPPROTO_TCP: 3424 if (sav->alg_enc != SADB_EALG_NONE) { 3425 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3426 "mismated.\n", __func__)); 3427 return(EINVAL); 3428 } 3429 error = xform_init(sav, XF_TCPSIGNATURE); 3430 break; 3431 default: 3432 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3433 error = EPROTONOSUPPORT; 3434 break; 3435 } 3436 if (error == 0) 3437 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3438 return (error); 3439 } 3440 3441 /* 3442 * subroutine for SADB_GET and SADB_DUMP. 3443 */ 3444 static struct mbuf * 3445 key_setdumpsa(sav, type, satype, seq, pid) 3446 struct secasvar *sav; 3447 u_int8_t type, satype; 3448 u_int32_t seq, pid; 3449 { 3450 struct mbuf *result = NULL, *tres = NULL, *m; 3451 int l = 0; 3452 int i; 3453 void *p; 3454 int dumporder[] = { 3455 SADB_EXT_SA, SADB_X_EXT_SA2, 3456 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3457 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3458 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3459 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3460 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3461 }; 3462 3463 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3464 if (m == NULL) 3465 goto fail; 3466 result = m; 3467 3468 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3469 m = NULL; 3470 p = NULL; 3471 switch (dumporder[i]) { 3472 case SADB_EXT_SA: 3473 m = key_setsadbsa(sav); 3474 if (!m) 3475 goto fail; 3476 break; 3477 3478 case SADB_X_EXT_SA2: 3479 m = key_setsadbxsa2(sav->sah->saidx.mode, 3480 sav->replay ? sav->replay->count : 0, 3481 sav->sah->saidx.reqid); 3482 if (!m) 3483 goto fail; 3484 break; 3485 3486 case SADB_EXT_ADDRESS_SRC: 3487 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3488 &sav->sah->saidx.src.sa, 3489 FULLMASK, IPSEC_ULPROTO_ANY); 3490 if (!m) 3491 goto fail; 3492 break; 3493 3494 case SADB_EXT_ADDRESS_DST: 3495 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3496 &sav->sah->saidx.dst.sa, 3497 FULLMASK, IPSEC_ULPROTO_ANY); 3498 if (!m) 3499 goto fail; 3500 break; 3501 3502 case SADB_EXT_KEY_AUTH: 3503 if (!sav->key_auth) 3504 continue; 3505 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3506 p = sav->key_auth; 3507 break; 3508 3509 case SADB_EXT_KEY_ENCRYPT: 3510 if (!sav->key_enc) 3511 continue; 3512 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3513 p = sav->key_enc; 3514 break; 3515 3516 case SADB_EXT_LIFETIME_CURRENT: 3517 if (!sav->lft_c) 3518 continue; 3519 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3520 p = sav->lft_c; 3521 break; 3522 3523 case SADB_EXT_LIFETIME_HARD: 3524 if (!sav->lft_h) 3525 continue; 3526 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3527 p = sav->lft_h; 3528 break; 3529 3530 case SADB_EXT_LIFETIME_SOFT: 3531 if (!sav->lft_s) 3532 continue; 3533 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3534 p = sav->lft_s; 3535 break; 3536 3537 case SADB_EXT_ADDRESS_PROXY: 3538 case SADB_EXT_IDENTITY_SRC: 3539 case SADB_EXT_IDENTITY_DST: 3540 /* XXX: should we brought from SPD ? */ 3541 case SADB_EXT_SENSITIVITY: 3542 default: 3543 continue; 3544 } 3545 3546 if ((!m && !p) || (m && p)) 3547 goto fail; 3548 if (p && tres) { 3549 M_PREPEND(tres, l, M_DONTWAIT); 3550 if (!tres) 3551 goto fail; 3552 bcopy(p, mtod(tres, void *), l); 3553 continue; 3554 } 3555 if (p) { 3556 m = key_alloc_mbuf(l); 3557 if (!m) 3558 goto fail; 3559 m_copyback(m, 0, l, p); 3560 } 3561 3562 if (tres) 3563 m_cat(m, tres); 3564 tres = m; 3565 } 3566 3567 m_cat(result, tres); 3568 3569 if (result->m_len < sizeof(struct sadb_msg)) { 3570 result = m_pullup(result, sizeof(struct sadb_msg)); 3571 if (result == NULL) 3572 goto fail; 3573 } 3574 3575 result->m_pkthdr.len = 0; 3576 for (m = result; m; m = m->m_next) 3577 result->m_pkthdr.len += m->m_len; 3578 3579 mtod(result, struct sadb_msg *)->sadb_msg_len = 3580 PFKEY_UNIT64(result->m_pkthdr.len); 3581 3582 return result; 3583 3584 fail: 3585 m_freem(result); 3586 m_freem(tres); 3587 return NULL; 3588 } 3589 3590 /* 3591 * set data into sadb_msg. 3592 */ 3593 static struct mbuf * 3594 key_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3595 u_int8_t type, satype; 3596 u_int16_t tlen; 3597 u_int32_t seq; 3598 pid_t pid; 3599 u_int16_t reserved; 3600 { 3601 struct mbuf *m; 3602 struct sadb_msg *p; 3603 int len; 3604 3605 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3606 if (len > MCLBYTES) 3607 return NULL; 3608 MGETHDR(m, M_DONTWAIT, MT_DATA); 3609 if (m && len > MHLEN) { 3610 MCLGET(m, M_DONTWAIT); 3611 if ((m->m_flags & M_EXT) == 0) { 3612 m_freem(m); 3613 m = NULL; 3614 } 3615 } 3616 if (!m) 3617 return NULL; 3618 m->m_pkthdr.len = m->m_len = len; 3619 m->m_next = NULL; 3620 3621 p = mtod(m, struct sadb_msg *); 3622 3623 bzero(p, len); 3624 p->sadb_msg_version = PF_KEY_V2; 3625 p->sadb_msg_type = type; 3626 p->sadb_msg_errno = 0; 3627 p->sadb_msg_satype = satype; 3628 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3629 p->sadb_msg_reserved = reserved; 3630 p->sadb_msg_seq = seq; 3631 p->sadb_msg_pid = (u_int32_t)pid; 3632 3633 return m; 3634 } 3635 3636 /* 3637 * copy secasvar data into sadb_address. 3638 */ 3639 static struct mbuf * 3640 key_setsadbsa(sav) 3641 struct secasvar *sav; 3642 { 3643 struct mbuf *m; 3644 struct sadb_sa *p; 3645 int len; 3646 3647 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3648 m = key_alloc_mbuf(len); 3649 if (!m || m->m_next) { /*XXX*/ 3650 if (m) 3651 m_freem(m); 3652 return NULL; 3653 } 3654 3655 p = mtod(m, struct sadb_sa *); 3656 3657 bzero(p, len); 3658 p->sadb_sa_len = PFKEY_UNIT64(len); 3659 p->sadb_sa_exttype = SADB_EXT_SA; 3660 p->sadb_sa_spi = sav->spi; 3661 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3662 p->sadb_sa_state = sav->state; 3663 p->sadb_sa_auth = sav->alg_auth; 3664 p->sadb_sa_encrypt = sav->alg_enc; 3665 p->sadb_sa_flags = sav->flags; 3666 3667 return m; 3668 } 3669 3670 /* 3671 * set data into sadb_address. 3672 */ 3673 static struct mbuf * 3674 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3675 u_int16_t exttype; 3676 const struct sockaddr *saddr; 3677 u_int8_t prefixlen; 3678 u_int16_t ul_proto; 3679 { 3680 struct mbuf *m; 3681 struct sadb_address *p; 3682 size_t len; 3683 3684 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3685 PFKEY_ALIGN8(saddr->sa_len); 3686 m = key_alloc_mbuf(len); 3687 if (!m || m->m_next) { /*XXX*/ 3688 if (m) 3689 m_freem(m); 3690 return NULL; 3691 } 3692 3693 p = mtod(m, struct sadb_address *); 3694 3695 bzero(p, len); 3696 p->sadb_address_len = PFKEY_UNIT64(len); 3697 p->sadb_address_exttype = exttype; 3698 p->sadb_address_proto = ul_proto; 3699 if (prefixlen == FULLMASK) { 3700 switch (saddr->sa_family) { 3701 case AF_INET: 3702 prefixlen = sizeof(struct in_addr) << 3; 3703 break; 3704 case AF_INET6: 3705 prefixlen = sizeof(struct in6_addr) << 3; 3706 break; 3707 default: 3708 ; /*XXX*/ 3709 } 3710 } 3711 p->sadb_address_prefixlen = prefixlen; 3712 p->sadb_address_reserved = 0; 3713 3714 bcopy(saddr, 3715 mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3716 saddr->sa_len); 3717 3718 return m; 3719 } 3720 3721 #if 0 3722 /* 3723 * set data into sadb_ident. 3724 */ 3725 static struct mbuf * 3726 key_setsadbident(exttype, idtype, string, stringlen, id) 3727 u_int16_t exttype, idtype; 3728 void *string; 3729 int stringlen; 3730 u_int64_t id; 3731 { 3732 struct mbuf *m; 3733 struct sadb_ident *p; 3734 size_t len; 3735 3736 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3737 m = key_alloc_mbuf(len); 3738 if (!m || m->m_next) { /*XXX*/ 3739 if (m) 3740 m_freem(m); 3741 return NULL; 3742 } 3743 3744 p = mtod(m, struct sadb_ident *); 3745 3746 bzero(p, len); 3747 p->sadb_ident_len = PFKEY_UNIT64(len); 3748 p->sadb_ident_exttype = exttype; 3749 p->sadb_ident_type = idtype; 3750 p->sadb_ident_reserved = 0; 3751 p->sadb_ident_id = id; 3752 3753 bcopy(string, 3754 mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3755 stringlen); 3756 3757 return m; 3758 } 3759 #endif 3760 3761 /* 3762 * set data into sadb_x_sa2. 3763 */ 3764 static struct mbuf * 3765 key_setsadbxsa2(mode, seq, reqid) 3766 u_int8_t mode; 3767 u_int32_t seq; 3768 u_int16_t reqid; 3769 { 3770 struct mbuf *m; 3771 struct sadb_x_sa2 *p; 3772 size_t len; 3773 3774 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3775 m = key_alloc_mbuf(len); 3776 if (!m || m->m_next) { /*XXX*/ 3777 if (m) 3778 m_freem(m); 3779 return NULL; 3780 } 3781 3782 p = mtod(m, struct sadb_x_sa2 *); 3783 3784 bzero(p, len); 3785 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3786 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3787 p->sadb_x_sa2_mode = mode; 3788 p->sadb_x_sa2_reserved1 = 0; 3789 p->sadb_x_sa2_reserved2 = 0; 3790 p->sadb_x_sa2_sequence = seq; 3791 p->sadb_x_sa2_reqid = reqid; 3792 3793 return m; 3794 } 3795 3796 /* 3797 * set data into sadb_x_policy 3798 */ 3799 static struct mbuf * 3800 key_setsadbxpolicy(type, dir, id) 3801 u_int16_t type; 3802 u_int8_t dir; 3803 u_int32_t id; 3804 { 3805 struct mbuf *m; 3806 struct sadb_x_policy *p; 3807 size_t len; 3808 3809 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3810 m = key_alloc_mbuf(len); 3811 if (!m || m->m_next) { /*XXX*/ 3812 if (m) 3813 m_freem(m); 3814 return NULL; 3815 } 3816 3817 p = mtod(m, struct sadb_x_policy *); 3818 3819 bzero(p, len); 3820 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3821 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3822 p->sadb_x_policy_type = type; 3823 p->sadb_x_policy_dir = dir; 3824 p->sadb_x_policy_id = id; 3825 3826 return m; 3827 } 3828 3829 /* %%% utilities */ 3830 /* 3831 * copy a buffer into the new buffer allocated. 3832 */ 3833 static void * 3834 key_newbuf(src, len) 3835 const void *src; 3836 u_int len; 3837 { 3838 void *new; 3839 3840 KMALLOC(new, void *, len); 3841 if (new == NULL) { 3842 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 3843 return NULL; 3844 } 3845 bcopy(src, new, len); 3846 3847 return new; 3848 } 3849 3850 /* compare my own address 3851 * OUT: 1: true, i.e. my address. 3852 * 0: false 3853 */ 3854 int 3855 key_ismyaddr(sa) 3856 struct sockaddr *sa; 3857 { 3858 #ifdef INET 3859 struct sockaddr_in *sin; 3860 struct in_ifaddr *ia; 3861 #endif 3862 3863 /* sanity check */ 3864 if (sa == NULL) 3865 panic("key_ismyaddr: NULL pointer is passed"); 3866 3867 switch (sa->sa_family) { 3868 #ifdef INET 3869 case AF_INET: 3870 sin = (struct sockaddr_in *)sa; 3871 for (ia = in_ifaddrhead.tqh_first; ia; 3872 ia = ia->ia_link.tqe_next) 3873 { 3874 if (sin->sin_family == ia->ia_addr.sin_family && 3875 sin->sin_len == ia->ia_addr.sin_len && 3876 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3877 { 3878 return 1; 3879 } 3880 } 3881 break; 3882 #endif 3883 #ifdef INET6 3884 case AF_INET6: 3885 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3886 #endif 3887 } 3888 3889 return 0; 3890 } 3891 3892 #ifdef INET6 3893 /* 3894 * compare my own address for IPv6. 3895 * 1: ours 3896 * 0: other 3897 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3898 */ 3899 #include <netinet6/in6_var.h> 3900 3901 static int 3902 key_ismyaddr6(sin6) 3903 struct sockaddr_in6 *sin6; 3904 { 3905 struct in6_ifaddr *ia; 3906 struct in6_multi *in6m; 3907 3908 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 3909 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3910 (struct sockaddr *)&ia->ia_addr, 0) == 0) 3911 return 1; 3912 3913 /* 3914 * XXX Multicast 3915 * XXX why do we care about multlicast here while we don't care 3916 * about IPv4 multicast?? 3917 * XXX scope 3918 */ 3919 in6m = NULL; 3920 #ifdef __FreeBSD__ 3921 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3922 #else 3923 for ((in6m) = ia->ia6_multiaddrs.lh_first; 3924 (in6m) != NULL && 3925 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 3926 (in6m) = in6m->in6m_entry.le_next) 3927 continue; 3928 #endif 3929 if (in6m) 3930 return 1; 3931 } 3932 3933 /* loopback, just for safety */ 3934 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3935 return 1; 3936 3937 return 0; 3938 } 3939 #endif /*INET6*/ 3940 3941 /* 3942 * compare two secasindex structure. 3943 * flag can specify to compare 2 saidxes. 3944 * compare two secasindex structure without both mode and reqid. 3945 * don't compare port. 3946 * IN: 3947 * saidx0: source, it can be in SAD. 3948 * saidx1: object. 3949 * OUT: 3950 * 1 : equal 3951 * 0 : not equal 3952 */ 3953 static int 3954 key_cmpsaidx( 3955 const struct secasindex *saidx0, 3956 const struct secasindex *saidx1, 3957 int flag) 3958 { 3959 /* sanity */ 3960 if (saidx0 == NULL && saidx1 == NULL) 3961 return 1; 3962 3963 if (saidx0 == NULL || saidx1 == NULL) 3964 return 0; 3965 3966 if (saidx0->proto != saidx1->proto) 3967 return 0; 3968 3969 if (flag == CMP_EXACTLY) { 3970 if (saidx0->mode != saidx1->mode) 3971 return 0; 3972 if (saidx0->reqid != saidx1->reqid) 3973 return 0; 3974 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3975 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3976 return 0; 3977 } else { 3978 3979 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3980 if (flag == CMP_MODE_REQID 3981 ||flag == CMP_REQID) { 3982 /* 3983 * If reqid of SPD is non-zero, unique SA is required. 3984 * The result must be of same reqid in this case. 3985 */ 3986 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3987 return 0; 3988 } 3989 3990 if (flag == CMP_MODE_REQID) { 3991 if (saidx0->mode != IPSEC_MODE_ANY 3992 && saidx0->mode != saidx1->mode) 3993 return 0; 3994 } 3995 3996 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3997 return 0; 3998 } 3999 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 4000 return 0; 4001 } 4002 } 4003 4004 return 1; 4005 } 4006 4007 /* 4008 * compare two secindex structure exactly. 4009 * IN: 4010 * spidx0: source, it is often in SPD. 4011 * spidx1: object, it is often from PFKEY message. 4012 * OUT: 4013 * 1 : equal 4014 * 0 : not equal 4015 */ 4016 int 4017 key_cmpspidx_exactly( 4018 struct secpolicyindex *spidx0, 4019 struct secpolicyindex *spidx1) 4020 { 4021 /* sanity */ 4022 if (spidx0 == NULL && spidx1 == NULL) 4023 return 1; 4024 4025 if (spidx0 == NULL || spidx1 == NULL) 4026 return 0; 4027 4028 if (spidx0->prefs != spidx1->prefs 4029 || spidx0->prefd != spidx1->prefd 4030 || spidx0->ul_proto != spidx1->ul_proto) 4031 return 0; 4032 4033 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4034 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4035 } 4036 4037 /* 4038 * compare two secindex structure with mask. 4039 * IN: 4040 * spidx0: source, it is often in SPD. 4041 * spidx1: object, it is often from IP header. 4042 * OUT: 4043 * 1 : equal 4044 * 0 : not equal 4045 */ 4046 int 4047 key_cmpspidx_withmask( 4048 struct secpolicyindex *spidx0, 4049 struct secpolicyindex *spidx1) 4050 { 4051 /* sanity */ 4052 if (spidx0 == NULL && spidx1 == NULL) 4053 return 1; 4054 4055 if (spidx0 == NULL || spidx1 == NULL) 4056 return 0; 4057 4058 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4059 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4060 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4061 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4062 return 0; 4063 4064 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4065 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4066 && spidx0->ul_proto != spidx1->ul_proto) 4067 return 0; 4068 4069 switch (spidx0->src.sa.sa_family) { 4070 case AF_INET: 4071 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4072 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4073 return 0; 4074 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4075 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4076 return 0; 4077 break; 4078 case AF_INET6: 4079 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4080 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4081 return 0; 4082 /* 4083 * scope_id check. if sin6_scope_id is 0, we regard it 4084 * as a wildcard scope, which matches any scope zone ID. 4085 */ 4086 if (spidx0->src.sin6.sin6_scope_id && 4087 spidx1->src.sin6.sin6_scope_id && 4088 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4089 return 0; 4090 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4091 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4092 return 0; 4093 break; 4094 default: 4095 /* XXX */ 4096 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4097 return 0; 4098 break; 4099 } 4100 4101 switch (spidx0->dst.sa.sa_family) { 4102 case AF_INET: 4103 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4104 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4105 return 0; 4106 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4107 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4108 return 0; 4109 break; 4110 case AF_INET6: 4111 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4112 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4113 return 0; 4114 /* 4115 * scope_id check. if sin6_scope_id is 0, we regard it 4116 * as a wildcard scope, which matches any scope zone ID. 4117 */ 4118 if (spidx0->src.sin6.sin6_scope_id && 4119 spidx1->src.sin6.sin6_scope_id && 4120 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4121 return 0; 4122 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4123 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4124 return 0; 4125 break; 4126 default: 4127 /* XXX */ 4128 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4129 return 0; 4130 break; 4131 } 4132 4133 /* XXX Do we check other field ? e.g. flowinfo */ 4134 4135 return 1; 4136 } 4137 4138 /* returns 0 on match */ 4139 static int 4140 key_sockaddrcmp( 4141 const struct sockaddr *sa1, 4142 const struct sockaddr *sa2, 4143 int port) 4144 { 4145 #ifdef satosin 4146 #undef satosin 4147 #endif 4148 #define satosin(s) ((const struct sockaddr_in *)s) 4149 #ifdef satosin6 4150 #undef satosin6 4151 #endif 4152 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4153 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4154 return 1; 4155 4156 switch (sa1->sa_family) { 4157 case AF_INET: 4158 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4159 return 1; 4160 if (satosin(sa1)->sin_addr.s_addr != 4161 satosin(sa2)->sin_addr.s_addr) { 4162 return 1; 4163 } 4164 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4165 return 1; 4166 break; 4167 case AF_INET6: 4168 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4169 return 1; /*EINVAL*/ 4170 if (satosin6(sa1)->sin6_scope_id != 4171 satosin6(sa2)->sin6_scope_id) { 4172 return 1; 4173 } 4174 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4175 &satosin6(sa2)->sin6_addr)) { 4176 return 1; 4177 } 4178 if (port && 4179 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4180 return 1; 4181 } 4182 break; 4183 default: 4184 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4185 return 1; 4186 break; 4187 } 4188 4189 return 0; 4190 #undef satosin 4191 #undef satosin6 4192 } 4193 4194 /* 4195 * compare two buffers with mask. 4196 * IN: 4197 * addr1: source 4198 * addr2: object 4199 * bits: Number of bits to compare 4200 * OUT: 4201 * 1 : equal 4202 * 0 : not equal 4203 */ 4204 static int 4205 key_bbcmp(const void *a1, const void *a2, u_int bits) 4206 { 4207 const unsigned char *p1 = a1; 4208 const unsigned char *p2 = a2; 4209 4210 /* XXX: This could be considerably faster if we compare a word 4211 * at a time, but it is complicated on LSB Endian machines */ 4212 4213 /* Handle null pointers */ 4214 if (p1 == NULL || p2 == NULL) 4215 return (p1 == p2); 4216 4217 while (bits >= 8) { 4218 if (*p1++ != *p2++) 4219 return 0; 4220 bits -= 8; 4221 } 4222 4223 if (bits > 0) { 4224 u_int8_t mask = ~((1<<(8-bits))-1); 4225 if ((*p1 & mask) != (*p2 & mask)) 4226 return 0; 4227 } 4228 return 1; /* Match! */ 4229 } 4230 4231 /* 4232 * time handler. 4233 * scanning SPD and SAD to check status for each entries, 4234 * and do to remove or to expire. 4235 * XXX: year 2038 problem may remain. 4236 */ 4237 void 4238 key_timehandler(void* arg) 4239 { 4240 u_int dir; 4241 int s; 4242 time_t now = time_second; 4243 4244 s = splsoftnet(); /*called from softclock()*/ 4245 4246 /* SPD */ 4247 { 4248 struct secpolicy *sp, *nextsp; 4249 4250 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4251 for (sp = LIST_FIRST(&sptree[dir]); 4252 sp != NULL; 4253 sp = nextsp) { 4254 4255 nextsp = LIST_NEXT(sp, chain); 4256 4257 if (sp->state == IPSEC_SPSTATE_DEAD) { 4258 key_sp_unlink(sp); /*XXX*/ 4259 4260 /* 'sp' dead; continue transfers to 4261 * 'sp = nextsp' 4262 */ 4263 continue; 4264 } 4265 4266 if (sp->lifetime == 0 && sp->validtime == 0) 4267 continue; 4268 4269 /* the deletion will occur next time */ 4270 if ((sp->lifetime && now - sp->created > sp->lifetime) 4271 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4272 key_sp_dead(sp); 4273 key_spdexpire(sp); 4274 continue; 4275 } 4276 } 4277 } 4278 } 4279 4280 /* SAD */ 4281 { 4282 struct secashead *sah, *nextsah; 4283 struct secasvar *sav, *nextsav; 4284 4285 for (sah = LIST_FIRST(&sahtree); 4286 sah != NULL; 4287 sah = nextsah) { 4288 4289 nextsah = LIST_NEXT(sah, chain); 4290 4291 /* if sah has been dead, then delete it and process next sah. */ 4292 if (sah->state == SADB_SASTATE_DEAD) { 4293 key_delsah(sah); 4294 continue; 4295 } 4296 4297 /* if LARVAL entry doesn't become MATURE, delete it. */ 4298 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4299 sav != NULL; 4300 sav = nextsav) { 4301 4302 nextsav = LIST_NEXT(sav, chain); 4303 4304 if (now - sav->created > key_larval_lifetime) { 4305 KEY_FREESAV(&sav); 4306 } 4307 } 4308 4309 /* 4310 * check MATURE entry to start to send expire message 4311 * whether or not. 4312 */ 4313 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4314 sav != NULL; 4315 sav = nextsav) { 4316 4317 nextsav = LIST_NEXT(sav, chain); 4318 4319 /* we don't need to check. */ 4320 if (sav->lft_s == NULL) 4321 continue; 4322 4323 /* sanity check */ 4324 if (sav->lft_c == NULL) { 4325 ipseclog((LOG_DEBUG,"key_timehandler: " 4326 "There is no CURRENT time, why?\n")); 4327 continue; 4328 } 4329 4330 /* check SOFT lifetime */ 4331 if (sav->lft_s->sadb_lifetime_addtime != 0 4332 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4333 /* 4334 * check SA to be used whether or not. 4335 * when SA hasn't been used, delete it. 4336 */ 4337 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4338 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4339 KEY_FREESAV(&sav); 4340 } else { 4341 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4342 /* 4343 * XXX If we keep to send expire 4344 * message in the status of 4345 * DYING. Do remove below code. 4346 */ 4347 key_expire(sav); 4348 } 4349 } 4350 /* check SOFT lifetime by bytes */ 4351 /* 4352 * XXX I don't know the way to delete this SA 4353 * when new SA is installed. Caution when it's 4354 * installed too big lifetime by time. 4355 */ 4356 else if (sav->lft_s->sadb_lifetime_bytes != 0 4357 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4358 4359 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4360 /* 4361 * XXX If we keep to send expire 4362 * message in the status of 4363 * DYING. Do remove below code. 4364 */ 4365 key_expire(sav); 4366 } 4367 } 4368 4369 /* check DYING entry to change status to DEAD. */ 4370 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4371 sav != NULL; 4372 sav = nextsav) { 4373 4374 nextsav = LIST_NEXT(sav, chain); 4375 4376 /* we don't need to check. */ 4377 if (sav->lft_h == NULL) 4378 continue; 4379 4380 /* sanity check */ 4381 if (sav->lft_c == NULL) { 4382 ipseclog((LOG_DEBUG, "key_timehandler: " 4383 "There is no CURRENT time, why?\n")); 4384 continue; 4385 } 4386 4387 if (sav->lft_h->sadb_lifetime_addtime != 0 4388 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4389 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4390 KEY_FREESAV(&sav); 4391 } 4392 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4393 else if (sav->lft_s != NULL 4394 && sav->lft_s->sadb_lifetime_addtime != 0 4395 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4396 /* 4397 * XXX: should be checked to be 4398 * installed the valid SA. 4399 */ 4400 4401 /* 4402 * If there is no SA then sending 4403 * expire message. 4404 */ 4405 key_expire(sav); 4406 } 4407 #endif 4408 /* check HARD lifetime by bytes */ 4409 else if (sav->lft_h->sadb_lifetime_bytes != 0 4410 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4411 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4412 KEY_FREESAV(&sav); 4413 } 4414 } 4415 4416 /* delete entry in DEAD */ 4417 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4418 sav != NULL; 4419 sav = nextsav) { 4420 4421 nextsav = LIST_NEXT(sav, chain); 4422 4423 /* sanity check */ 4424 if (sav->state != SADB_SASTATE_DEAD) { 4425 ipseclog((LOG_DEBUG, "key_timehandler: " 4426 "invalid sav->state " 4427 "(queue: %d SA: %d): " 4428 "kill it anyway\n", 4429 SADB_SASTATE_DEAD, sav->state)); 4430 } 4431 4432 /* 4433 * do not call key_freesav() here. 4434 * sav should already be freed, and sav->refcnt 4435 * shows other references to sav 4436 * (such as from SPD). 4437 */ 4438 } 4439 } 4440 } 4441 4442 #ifndef IPSEC_NONBLOCK_ACQUIRE 4443 /* ACQ tree */ 4444 { 4445 struct secacq *acq, *nextacq; 4446 4447 for (acq = LIST_FIRST(&acqtree); 4448 acq != NULL; 4449 acq = nextacq) { 4450 4451 nextacq = LIST_NEXT(acq, chain); 4452 4453 if (now - acq->created > key_blockacq_lifetime 4454 && __LIST_CHAINED(acq)) { 4455 LIST_REMOVE(acq, chain); 4456 KFREE(acq); 4457 } 4458 } 4459 } 4460 #endif 4461 4462 /* SP ACQ tree */ 4463 { 4464 struct secspacq *acq, *nextacq; 4465 4466 for (acq = LIST_FIRST(&spacqtree); 4467 acq != NULL; 4468 acq = nextacq) { 4469 4470 nextacq = LIST_NEXT(acq, chain); 4471 4472 if (now - acq->created > key_blockacq_lifetime 4473 && __LIST_CHAINED(acq)) { 4474 LIST_REMOVE(acq, chain); 4475 KFREE(acq); 4476 } 4477 } 4478 } 4479 4480 /* initialize random seed */ 4481 if (key_tick_init_random++ > key_int_random) { 4482 key_tick_init_random = 0; 4483 key_srandom(); 4484 } 4485 4486 #ifndef IPSEC_DEBUG2 4487 /* do exchange to tick time !! */ 4488 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 4489 #endif /* IPSEC_DEBUG2 */ 4490 4491 splx(s); 4492 return; 4493 } 4494 4495 #ifdef __NetBSD__ 4496 void srandom(int); 4497 void srandom(int arg) {return;} 4498 #endif 4499 4500 /* 4501 * to initialize a seed for random() 4502 */ 4503 static void 4504 key_srandom() 4505 { 4506 srandom(time_second); 4507 } 4508 4509 u_long 4510 key_random() 4511 { 4512 u_long value; 4513 4514 key_randomfill(&value, sizeof(value)); 4515 return value; 4516 } 4517 4518 void 4519 key_randomfill(p, l) 4520 void *p; 4521 size_t l; 4522 { 4523 size_t n; 4524 u_long v; 4525 static int warn = 1; 4526 4527 n = 0; 4528 n = (size_t)read_random(p, (u_int)l); 4529 /* last resort */ 4530 while (n < l) { 4531 v = random(); 4532 bcopy(&v, (u_int8_t *)p + n, 4533 l - n < sizeof(v) ? l - n : sizeof(v)); 4534 n += sizeof(v); 4535 4536 if (warn) { 4537 printf("WARNING: pseudo-random number generator " 4538 "used for IPsec processing\n"); 4539 warn = 0; 4540 } 4541 } 4542 } 4543 4544 /* 4545 * map SADB_SATYPE_* to IPPROTO_*. 4546 * if satype == SADB_SATYPE then satype is mapped to ~0. 4547 * OUT: 4548 * 0: invalid satype. 4549 */ 4550 static u_int16_t 4551 key_satype2proto(satype) 4552 u_int8_t satype; 4553 { 4554 switch (satype) { 4555 case SADB_SATYPE_UNSPEC: 4556 return IPSEC_PROTO_ANY; 4557 case SADB_SATYPE_AH: 4558 return IPPROTO_AH; 4559 case SADB_SATYPE_ESP: 4560 return IPPROTO_ESP; 4561 case SADB_X_SATYPE_IPCOMP: 4562 return IPPROTO_IPCOMP; 4563 case SADB_X_SATYPE_TCPSIGNATURE: 4564 return IPPROTO_TCP; 4565 default: 4566 return 0; 4567 } 4568 /* NOTREACHED */ 4569 } 4570 4571 /* 4572 * map IPPROTO_* to SADB_SATYPE_* 4573 * OUT: 4574 * 0: invalid protocol type. 4575 */ 4576 static u_int8_t 4577 key_proto2satype(proto) 4578 u_int16_t proto; 4579 { 4580 switch (proto) { 4581 case IPPROTO_AH: 4582 return SADB_SATYPE_AH; 4583 case IPPROTO_ESP: 4584 return SADB_SATYPE_ESP; 4585 case IPPROTO_IPCOMP: 4586 return SADB_X_SATYPE_IPCOMP; 4587 case IPPROTO_TCP: 4588 return SADB_X_SATYPE_TCPSIGNATURE; 4589 default: 4590 return 0; 4591 } 4592 /* NOTREACHED */ 4593 } 4594 4595 /* %%% PF_KEY */ 4596 /* 4597 * SADB_GETSPI processing is to receive 4598 * <base, (SA2), src address, dst address, (SPI range)> 4599 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4600 * tree with the status of LARVAL, and send 4601 * <base, SA(*), address(SD)> 4602 * to the IKMPd. 4603 * 4604 * IN: mhp: pointer to the pointer to each header. 4605 * OUT: NULL if fail. 4606 * other if success, return pointer to the message to send. 4607 */ 4608 static int 4609 key_getspi(so, m, mhp) 4610 struct socket *so; 4611 struct mbuf *m; 4612 const struct sadb_msghdr *mhp; 4613 { 4614 struct sadb_address *src0, *dst0; 4615 struct secasindex saidx; 4616 struct secashead *newsah; 4617 struct secasvar *newsav; 4618 u_int8_t proto; 4619 u_int32_t spi; 4620 u_int8_t mode; 4621 u_int16_t reqid; 4622 int error; 4623 4624 /* sanity check */ 4625 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4626 panic("key_getspi: NULL pointer is passed"); 4627 4628 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4629 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4630 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4631 return key_senderror(so, m, EINVAL); 4632 } 4633 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4634 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4635 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4636 return key_senderror(so, m, EINVAL); 4637 } 4638 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4639 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4640 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4641 } else { 4642 mode = IPSEC_MODE_ANY; 4643 reqid = 0; 4644 } 4645 4646 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4647 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4648 4649 /* map satype to proto */ 4650 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4651 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4652 return key_senderror(so, m, EINVAL); 4653 } 4654 4655 /* make sure if port number is zero. */ 4656 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4657 case AF_INET: 4658 if (((struct sockaddr *)(src0 + 1))->sa_len != 4659 sizeof(struct sockaddr_in)) 4660 return key_senderror(so, m, EINVAL); 4661 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4662 break; 4663 case AF_INET6: 4664 if (((struct sockaddr *)(src0 + 1))->sa_len != 4665 sizeof(struct sockaddr_in6)) 4666 return key_senderror(so, m, EINVAL); 4667 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4668 break; 4669 default: 4670 ; /*???*/ 4671 } 4672 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4673 case AF_INET: 4674 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4675 sizeof(struct sockaddr_in)) 4676 return key_senderror(so, m, EINVAL); 4677 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4678 break; 4679 case AF_INET6: 4680 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4681 sizeof(struct sockaddr_in6)) 4682 return key_senderror(so, m, EINVAL); 4683 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4684 break; 4685 default: 4686 ; /*???*/ 4687 } 4688 4689 /* XXX boundary check against sa_len */ 4690 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4691 4692 /* SPI allocation */ 4693 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4694 &saidx); 4695 if (spi == 0) 4696 return key_senderror(so, m, EINVAL); 4697 4698 /* get a SA index */ 4699 if ((newsah = key_getsah(&saidx)) == NULL) { 4700 /* create a new SA index */ 4701 if ((newsah = key_newsah(&saidx)) == NULL) { 4702 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4703 return key_senderror(so, m, ENOBUFS); 4704 } 4705 } 4706 4707 /* get a new SA */ 4708 /* XXX rewrite */ 4709 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4710 if (newsav == NULL) { 4711 /* XXX don't free new SA index allocated in above. */ 4712 return key_senderror(so, m, error); 4713 } 4714 4715 /* set spi */ 4716 newsav->spi = htonl(spi); 4717 4718 #ifndef IPSEC_NONBLOCK_ACQUIRE 4719 /* delete the entry in acqtree */ 4720 if (mhp->msg->sadb_msg_seq != 0) { 4721 struct secacq *acq; 4722 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4723 /* reset counter in order to deletion by timehandler. */ 4724 acq->created = time_second; 4725 acq->count = 0; 4726 } 4727 } 4728 #endif 4729 4730 { 4731 struct mbuf *n, *nn; 4732 struct sadb_sa *m_sa; 4733 struct sadb_msg *newmsg; 4734 int off, len; 4735 4736 /* create new sadb_msg to reply. */ 4737 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4738 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4739 if (len > MCLBYTES) 4740 return key_senderror(so, m, ENOBUFS); 4741 4742 MGETHDR(n, M_DONTWAIT, MT_DATA); 4743 if (len > MHLEN) { 4744 MCLGET(n, M_DONTWAIT); 4745 if ((n->m_flags & M_EXT) == 0) { 4746 m_freem(n); 4747 n = NULL; 4748 } 4749 } 4750 if (!n) 4751 return key_senderror(so, m, ENOBUFS); 4752 4753 n->m_len = len; 4754 n->m_next = NULL; 4755 off = 0; 4756 4757 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, void *) + off); 4758 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4759 4760 m_sa = (struct sadb_sa *)(mtod(n, void *) + off); 4761 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4762 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4763 m_sa->sadb_sa_spi = htonl(spi); 4764 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4765 4766 #ifdef DIAGNOSTIC 4767 if (off != len) 4768 panic("length inconsistency in key_getspi"); 4769 #endif 4770 4771 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4772 SADB_EXT_ADDRESS_DST); 4773 if (!n->m_next) { 4774 m_freem(n); 4775 return key_senderror(so, m, ENOBUFS); 4776 } 4777 4778 if (n->m_len < sizeof(struct sadb_msg)) { 4779 n = m_pullup(n, sizeof(struct sadb_msg)); 4780 if (n == NULL) 4781 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4782 } 4783 4784 n->m_pkthdr.len = 0; 4785 for (nn = n; nn; nn = nn->m_next) 4786 n->m_pkthdr.len += nn->m_len; 4787 4788 newmsg = mtod(n, struct sadb_msg *); 4789 newmsg->sadb_msg_seq = newsav->seq; 4790 newmsg->sadb_msg_errno = 0; 4791 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4792 4793 m_freem(m); 4794 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4795 } 4796 } 4797 4798 /* 4799 * allocating new SPI 4800 * called by key_getspi(). 4801 * OUT: 4802 * 0: failure. 4803 * others: success. 4804 */ 4805 static u_int32_t 4806 key_do_getnewspi(spirange, saidx) 4807 struct sadb_spirange *spirange; 4808 struct secasindex *saidx; 4809 { 4810 u_int32_t newspi; 4811 u_int32_t spmin, spmax; 4812 int count = key_spi_trycnt; 4813 4814 /* set spi range to allocate */ 4815 if (spirange != NULL) { 4816 spmin = spirange->sadb_spirange_min; 4817 spmax = spirange->sadb_spirange_max; 4818 } else { 4819 spmin = key_spi_minval; 4820 spmax = key_spi_maxval; 4821 } 4822 /* IPCOMP needs 2-byte SPI */ 4823 if (saidx->proto == IPPROTO_IPCOMP) { 4824 u_int32_t t; 4825 if (spmin >= 0x10000) 4826 spmin = 0xffff; 4827 if (spmax >= 0x10000) 4828 spmax = 0xffff; 4829 if (spmin > spmax) { 4830 t = spmin; spmin = spmax; spmax = t; 4831 } 4832 } 4833 4834 if (spmin == spmax) { 4835 if (key_checkspidup(saidx, spmin) != NULL) { 4836 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 4837 return 0; 4838 } 4839 4840 count--; /* taking one cost. */ 4841 newspi = spmin; 4842 4843 } else { 4844 4845 /* init SPI */ 4846 newspi = 0; 4847 4848 /* when requesting to allocate spi ranged */ 4849 while (count--) { 4850 /* generate pseudo-random SPI value ranged. */ 4851 newspi = spmin + (key_random() % (spmax - spmin + 1)); 4852 4853 if (key_checkspidup(saidx, newspi) == NULL) 4854 break; 4855 } 4856 4857 if (count == 0 || newspi == 0) { 4858 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 4859 return 0; 4860 } 4861 } 4862 4863 /* statistics */ 4864 keystat.getspi_count = 4865 (keystat.getspi_count + key_spi_trycnt - count) / 2; 4866 4867 return newspi; 4868 } 4869 4870 /* 4871 * SADB_UPDATE processing 4872 * receive 4873 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4874 * key(AE), (identity(SD),) (sensitivity)> 4875 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4876 * and send 4877 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4878 * (identity(SD),) (sensitivity)> 4879 * to the ikmpd. 4880 * 4881 * m will always be freed. 4882 */ 4883 static int 4884 key_update(so, m, mhp) 4885 struct socket *so; 4886 struct mbuf *m; 4887 const struct sadb_msghdr *mhp; 4888 { 4889 struct sadb_sa *sa0; 4890 struct sadb_address *src0, *dst0; 4891 struct secasindex saidx; 4892 struct secashead *sah; 4893 struct secasvar *sav; 4894 u_int16_t proto; 4895 u_int8_t mode; 4896 u_int16_t reqid; 4897 int error; 4898 4899 /* sanity check */ 4900 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4901 panic("key_update: NULL pointer is passed"); 4902 4903 /* map satype to proto */ 4904 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4905 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 4906 return key_senderror(so, m, EINVAL); 4907 } 4908 4909 if (mhp->ext[SADB_EXT_SA] == NULL || 4910 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4911 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4912 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4913 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4914 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4915 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4916 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4917 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4918 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4919 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4920 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4921 return key_senderror(so, m, EINVAL); 4922 } 4923 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4924 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4925 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4926 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4927 return key_senderror(so, m, EINVAL); 4928 } 4929 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4930 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4931 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4932 } else { 4933 mode = IPSEC_MODE_ANY; 4934 reqid = 0; 4935 } 4936 /* XXX boundary checking for other extensions */ 4937 4938 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4939 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4940 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4941 4942 /* XXX boundary check against sa_len */ 4943 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4944 4945 /* get a SA header */ 4946 if ((sah = key_getsah(&saidx)) == NULL) { 4947 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 4948 return key_senderror(so, m, ENOENT); 4949 } 4950 4951 /* set spidx if there */ 4952 /* XXX rewrite */ 4953 error = key_setident(sah, m, mhp); 4954 if (error) 4955 return key_senderror(so, m, error); 4956 4957 /* find a SA with sequence number. */ 4958 #ifdef IPSEC_DOSEQCHECK 4959 if (mhp->msg->sadb_msg_seq != 0 4960 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4961 ipseclog((LOG_DEBUG, 4962 "key_update: no larval SA with sequence %u exists.\n", 4963 mhp->msg->sadb_msg_seq)); 4964 return key_senderror(so, m, ENOENT); 4965 } 4966 #else 4967 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 4968 ipseclog((LOG_DEBUG, 4969 "key_update: no such a SA found (spi:%u)\n", 4970 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4971 return key_senderror(so, m, EINVAL); 4972 } 4973 #endif 4974 4975 /* validity check */ 4976 if (sav->sah->saidx.proto != proto) { 4977 ipseclog((LOG_DEBUG, 4978 "key_update: protocol mismatched (DB=%u param=%u)\n", 4979 sav->sah->saidx.proto, proto)); 4980 return key_senderror(so, m, EINVAL); 4981 } 4982 #ifdef IPSEC_DOSEQCHECK 4983 if (sav->spi != sa0->sadb_sa_spi) { 4984 ipseclog((LOG_DEBUG, 4985 "key_update: SPI mismatched (DB:%u param:%u)\n", 4986 (u_int32_t)ntohl(sav->spi), 4987 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4988 return key_senderror(so, m, EINVAL); 4989 } 4990 #endif 4991 if (sav->pid != mhp->msg->sadb_msg_pid) { 4992 ipseclog((LOG_DEBUG, 4993 "key_update: pid mismatched (DB:%u param:%u)\n", 4994 sav->pid, mhp->msg->sadb_msg_pid)); 4995 return key_senderror(so, m, EINVAL); 4996 } 4997 4998 /* copy sav values */ 4999 error = key_setsaval(sav, m, mhp); 5000 if (error) { 5001 KEY_FREESAV(&sav); 5002 return key_senderror(so, m, error); 5003 } 5004 5005 /* check SA values to be mature. */ 5006 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5007 KEY_FREESAV(&sav); 5008 return key_senderror(so, m, 0); 5009 } 5010 5011 { 5012 struct mbuf *n; 5013 5014 /* set msg buf from mhp */ 5015 n = key_getmsgbuf_x1(m, mhp); 5016 if (n == NULL) { 5017 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5018 return key_senderror(so, m, ENOBUFS); 5019 } 5020 5021 m_freem(m); 5022 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5023 } 5024 } 5025 5026 /* 5027 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5028 * only called by key_update(). 5029 * OUT: 5030 * NULL : not found 5031 * others : found, pointer to a SA. 5032 */ 5033 #ifdef IPSEC_DOSEQCHECK 5034 static struct secasvar * 5035 key_getsavbyseq(sah, seq) 5036 struct secashead *sah; 5037 u_int32_t seq; 5038 { 5039 struct secasvar *sav; 5040 u_int state; 5041 5042 state = SADB_SASTATE_LARVAL; 5043 5044 /* search SAD with sequence number ? */ 5045 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5046 5047 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5048 5049 if (sav->seq == seq) { 5050 SA_ADDREF(sav); 5051 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5052 printf("DP key_getsavbyseq cause " 5053 "refcnt++:%d SA:%p\n", 5054 sav->refcnt, sav)); 5055 return sav; 5056 } 5057 } 5058 5059 return NULL; 5060 } 5061 #endif 5062 5063 /* 5064 * SADB_ADD processing 5065 * add an entry to SA database, when received 5066 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5067 * key(AE), (identity(SD),) (sensitivity)> 5068 * from the ikmpd, 5069 * and send 5070 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5071 * (identity(SD),) (sensitivity)> 5072 * to the ikmpd. 5073 * 5074 * IGNORE identity and sensitivity messages. 5075 * 5076 * m will always be freed. 5077 */ 5078 static int 5079 key_add(so, m, mhp) 5080 struct socket *so; 5081 struct mbuf *m; 5082 const struct sadb_msghdr *mhp; 5083 { 5084 struct sadb_sa *sa0; 5085 struct sadb_address *src0, *dst0; 5086 struct secasindex saidx; 5087 struct secashead *newsah; 5088 struct secasvar *newsav; 5089 u_int16_t proto; 5090 u_int8_t mode; 5091 u_int16_t reqid; 5092 int error; 5093 5094 /* sanity check */ 5095 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5096 panic("key_add: NULL pointer is passed"); 5097 5098 /* map satype to proto */ 5099 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5100 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5101 return key_senderror(so, m, EINVAL); 5102 } 5103 5104 if (mhp->ext[SADB_EXT_SA] == NULL || 5105 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5106 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5107 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5108 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5109 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5110 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5111 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5112 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5113 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5114 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5115 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5116 return key_senderror(so, m, EINVAL); 5117 } 5118 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5119 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5120 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5121 /* XXX need more */ 5122 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5123 return key_senderror(so, m, EINVAL); 5124 } 5125 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5126 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5127 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5128 } else { 5129 mode = IPSEC_MODE_ANY; 5130 reqid = 0; 5131 } 5132 5133 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5134 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5135 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5136 5137 /* XXX boundary check against sa_len */ 5138 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5139 5140 /* get a SA header */ 5141 if ((newsah = key_getsah(&saidx)) == NULL) { 5142 /* create a new SA header */ 5143 if ((newsah = key_newsah(&saidx)) == NULL) { 5144 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5145 return key_senderror(so, m, ENOBUFS); 5146 } 5147 } 5148 5149 /* set spidx if there */ 5150 /* XXX rewrite */ 5151 error = key_setident(newsah, m, mhp); 5152 if (error) { 5153 return key_senderror(so, m, error); 5154 } 5155 5156 /* create new SA entry. */ 5157 /* We can create new SA only if SPI is differenct. */ 5158 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5159 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5160 return key_senderror(so, m, EEXIST); 5161 } 5162 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5163 if (newsav == NULL) { 5164 return key_senderror(so, m, error); 5165 } 5166 5167 /* check SA values to be mature. */ 5168 if ((error = key_mature(newsav)) != 0) { 5169 KEY_FREESAV(&newsav); 5170 return key_senderror(so, m, error); 5171 } 5172 5173 /* 5174 * don't call key_freesav() here, as we would like to keep the SA 5175 * in the database on success. 5176 */ 5177 5178 { 5179 struct mbuf *n; 5180 5181 /* set msg buf from mhp */ 5182 n = key_getmsgbuf_x1(m, mhp); 5183 if (n == NULL) { 5184 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5185 return key_senderror(so, m, ENOBUFS); 5186 } 5187 5188 m_freem(m); 5189 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5190 } 5191 } 5192 5193 /* m is retained */ 5194 static int 5195 key_setident(sah, m, mhp) 5196 struct secashead *sah; 5197 struct mbuf *m; 5198 const struct sadb_msghdr *mhp; 5199 { 5200 const struct sadb_ident *idsrc, *iddst; 5201 int idsrclen, iddstlen; 5202 5203 /* sanity check */ 5204 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5205 panic("key_setident: NULL pointer is passed"); 5206 5207 /* don't make buffer if not there */ 5208 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5209 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5210 sah->idents = NULL; 5211 sah->identd = NULL; 5212 return 0; 5213 } 5214 5215 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5216 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5217 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5218 return EINVAL; 5219 } 5220 5221 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5222 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5223 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5224 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5225 5226 /* validity check */ 5227 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5228 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5229 return EINVAL; 5230 } 5231 5232 switch (idsrc->sadb_ident_type) { 5233 case SADB_IDENTTYPE_PREFIX: 5234 case SADB_IDENTTYPE_FQDN: 5235 case SADB_IDENTTYPE_USERFQDN: 5236 default: 5237 /* XXX do nothing */ 5238 sah->idents = NULL; 5239 sah->identd = NULL; 5240 return 0; 5241 } 5242 5243 /* make structure */ 5244 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5245 if (sah->idents == NULL) { 5246 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5247 return ENOBUFS; 5248 } 5249 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5250 if (sah->identd == NULL) { 5251 KFREE(sah->idents); 5252 sah->idents = NULL; 5253 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5254 return ENOBUFS; 5255 } 5256 bcopy(idsrc, sah->idents, idsrclen); 5257 bcopy(iddst, sah->identd, iddstlen); 5258 5259 return 0; 5260 } 5261 5262 /* 5263 * m will not be freed on return. 5264 * it is caller's responsibility to free the result. 5265 */ 5266 static struct mbuf * 5267 key_getmsgbuf_x1(m, mhp) 5268 struct mbuf *m; 5269 const struct sadb_msghdr *mhp; 5270 { 5271 struct mbuf *n; 5272 5273 /* sanity check */ 5274 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5275 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5276 5277 /* create new sadb_msg to reply. */ 5278 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5279 SADB_EXT_SA, SADB_X_EXT_SA2, 5280 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5281 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5282 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5283 if (!n) 5284 return NULL; 5285 5286 if (n->m_len < sizeof(struct sadb_msg)) { 5287 n = m_pullup(n, sizeof(struct sadb_msg)); 5288 if (n == NULL) 5289 return NULL; 5290 } 5291 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5292 mtod(n, struct sadb_msg *)->sadb_msg_len = 5293 PFKEY_UNIT64(n->m_pkthdr.len); 5294 5295 return n; 5296 } 5297 5298 static int key_delete_all __P((struct socket *, struct mbuf *, 5299 const struct sadb_msghdr *, u_int16_t)); 5300 5301 /* 5302 * SADB_DELETE processing 5303 * receive 5304 * <base, SA(*), address(SD)> 5305 * from the ikmpd, and set SADB_SASTATE_DEAD, 5306 * and send, 5307 * <base, SA(*), address(SD)> 5308 * to the ikmpd. 5309 * 5310 * m will always be freed. 5311 */ 5312 static int 5313 key_delete(so, m, mhp) 5314 struct socket *so; 5315 struct mbuf *m; 5316 const struct sadb_msghdr *mhp; 5317 { 5318 struct sadb_sa *sa0; 5319 struct sadb_address *src0, *dst0; 5320 struct secasindex saidx; 5321 struct secashead *sah; 5322 struct secasvar *sav = NULL; 5323 u_int16_t proto; 5324 5325 /* sanity check */ 5326 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5327 panic("key_delete: NULL pointer is passed"); 5328 5329 /* map satype to proto */ 5330 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5331 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5332 return key_senderror(so, m, EINVAL); 5333 } 5334 5335 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5336 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5337 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5338 return key_senderror(so, m, EINVAL); 5339 } 5340 5341 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5342 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5343 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5344 return key_senderror(so, m, EINVAL); 5345 } 5346 5347 if (mhp->ext[SADB_EXT_SA] == NULL) { 5348 /* 5349 * Caller wants us to delete all non-LARVAL SAs 5350 * that match the src/dst. This is used during 5351 * IKE INITIAL-CONTACT. 5352 */ 5353 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5354 return key_delete_all(so, m, mhp, proto); 5355 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5356 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5357 return key_senderror(so, m, EINVAL); 5358 } 5359 5360 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5361 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5362 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5363 5364 /* XXX boundary check against sa_len */ 5365 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5366 5367 /* get a SA header */ 5368 LIST_FOREACH(sah, &sahtree, chain) { 5369 if (sah->state == SADB_SASTATE_DEAD) 5370 continue; 5371 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5372 continue; 5373 5374 /* get a SA with SPI. */ 5375 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5376 if (sav) 5377 break; 5378 } 5379 if (sah == NULL) { 5380 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5381 return key_senderror(so, m, ENOENT); 5382 } 5383 5384 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5385 KEY_FREESAV(&sav); 5386 5387 { 5388 struct mbuf *n; 5389 struct sadb_msg *newmsg; 5390 5391 /* create new sadb_msg to reply. */ 5392 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5393 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5394 if (!n) 5395 return key_senderror(so, m, ENOBUFS); 5396 5397 if (n->m_len < sizeof(struct sadb_msg)) { 5398 n = m_pullup(n, sizeof(struct sadb_msg)); 5399 if (n == NULL) 5400 return key_senderror(so, m, ENOBUFS); 5401 } 5402 newmsg = mtod(n, struct sadb_msg *); 5403 newmsg->sadb_msg_errno = 0; 5404 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5405 5406 m_freem(m); 5407 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5408 } 5409 } 5410 5411 /* 5412 * delete all SAs for src/dst. Called from key_delete(). 5413 */ 5414 static int 5415 key_delete_all(so, m, mhp, proto) 5416 struct socket *so; 5417 struct mbuf *m; 5418 const struct sadb_msghdr *mhp; 5419 u_int16_t proto; 5420 { 5421 struct sadb_address *src0, *dst0; 5422 struct secasindex saidx; 5423 struct secashead *sah; 5424 struct secasvar *sav, *nextsav; 5425 u_int stateidx, state; 5426 5427 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5428 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5429 5430 /* XXX boundary check against sa_len */ 5431 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5432 5433 LIST_FOREACH(sah, &sahtree, chain) { 5434 if (sah->state == SADB_SASTATE_DEAD) 5435 continue; 5436 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5437 continue; 5438 5439 /* Delete all non-LARVAL SAs. */ 5440 for (stateidx = 0; 5441 stateidx < _ARRAYLEN(saorder_state_alive); 5442 stateidx++) { 5443 state = saorder_state_alive[stateidx]; 5444 if (state == SADB_SASTATE_LARVAL) 5445 continue; 5446 for (sav = LIST_FIRST(&sah->savtree[state]); 5447 sav != NULL; sav = nextsav) { 5448 nextsav = LIST_NEXT(sav, chain); 5449 /* sanity check */ 5450 if (sav->state != state) { 5451 ipseclog((LOG_DEBUG, "key_delete_all: " 5452 "invalid sav->state " 5453 "(queue: %d SA: %d)\n", 5454 state, sav->state)); 5455 continue; 5456 } 5457 5458 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5459 KEY_FREESAV(&sav); 5460 } 5461 } 5462 } 5463 { 5464 struct mbuf *n; 5465 struct sadb_msg *newmsg; 5466 5467 /* create new sadb_msg to reply. */ 5468 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5469 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5470 if (!n) 5471 return key_senderror(so, m, ENOBUFS); 5472 5473 if (n->m_len < sizeof(struct sadb_msg)) { 5474 n = m_pullup(n, sizeof(struct sadb_msg)); 5475 if (n == NULL) 5476 return key_senderror(so, m, ENOBUFS); 5477 } 5478 newmsg = mtod(n, struct sadb_msg *); 5479 newmsg->sadb_msg_errno = 0; 5480 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5481 5482 m_freem(m); 5483 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5484 } 5485 } 5486 5487 /* 5488 * SADB_GET processing 5489 * receive 5490 * <base, SA(*), address(SD)> 5491 * from the ikmpd, and get a SP and a SA to respond, 5492 * and send, 5493 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5494 * (identity(SD),) (sensitivity)> 5495 * to the ikmpd. 5496 * 5497 * m will always be freed. 5498 */ 5499 static int 5500 key_get(so, m, mhp) 5501 struct socket *so; 5502 struct mbuf *m; 5503 const struct sadb_msghdr *mhp; 5504 { 5505 struct sadb_sa *sa0; 5506 struct sadb_address *src0, *dst0; 5507 struct secasindex saidx; 5508 struct secashead *sah; 5509 struct secasvar *sav = NULL; 5510 u_int16_t proto; 5511 5512 /* sanity check */ 5513 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5514 panic("key_get: NULL pointer is passed"); 5515 5516 /* map satype to proto */ 5517 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5518 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5519 return key_senderror(so, m, EINVAL); 5520 } 5521 5522 if (mhp->ext[SADB_EXT_SA] == NULL || 5523 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5524 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5525 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5526 return key_senderror(so, m, EINVAL); 5527 } 5528 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5529 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5530 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5531 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5532 return key_senderror(so, m, EINVAL); 5533 } 5534 5535 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5536 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5537 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5538 5539 /* XXX boundary check against sa_len */ 5540 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5541 5542 /* get a SA header */ 5543 LIST_FOREACH(sah, &sahtree, chain) { 5544 if (sah->state == SADB_SASTATE_DEAD) 5545 continue; 5546 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5547 continue; 5548 5549 /* get a SA with SPI. */ 5550 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5551 if (sav) 5552 break; 5553 } 5554 if (sah == NULL) { 5555 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5556 return key_senderror(so, m, ENOENT); 5557 } 5558 5559 { 5560 struct mbuf *n; 5561 u_int8_t satype; 5562 5563 /* map proto to satype */ 5564 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5565 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5566 return key_senderror(so, m, EINVAL); 5567 } 5568 5569 /* create new sadb_msg to reply. */ 5570 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5571 mhp->msg->sadb_msg_pid); 5572 if (!n) 5573 return key_senderror(so, m, ENOBUFS); 5574 5575 m_freem(m); 5576 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5577 } 5578 } 5579 5580 /* XXX make it sysctl-configurable? */ 5581 static void 5582 key_getcomb_setlifetime(comb) 5583 struct sadb_comb *comb; 5584 { 5585 5586 comb->sadb_comb_soft_allocations = 1; 5587 comb->sadb_comb_hard_allocations = 1; 5588 comb->sadb_comb_soft_bytes = 0; 5589 comb->sadb_comb_hard_bytes = 0; 5590 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5591 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5592 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5593 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5594 } 5595 5596 /* 5597 * XXX reorder combinations by preference 5598 * XXX no idea if the user wants ESP authentication or not 5599 */ 5600 static struct mbuf * 5601 key_getcomb_esp() 5602 { 5603 struct sadb_comb *comb; 5604 struct enc_xform *algo; 5605 struct mbuf *result = NULL, *m, *n; 5606 int encmin; 5607 int i, off, o; 5608 int totlen; 5609 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5610 5611 m = NULL; 5612 for (i = 1; i <= SADB_EALG_MAX; i++) { 5613 algo = esp_algorithm_lookup(i); 5614 if (algo == NULL) 5615 continue; 5616 5617 /* discard algorithms with key size smaller than system min */ 5618 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5619 continue; 5620 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5621 encmin = ipsec_esp_keymin; 5622 else 5623 encmin = _BITS(algo->minkey); 5624 5625 if (ipsec_esp_auth) 5626 m = key_getcomb_ah(); 5627 else { 5628 IPSEC_ASSERT(l <= MLEN, 5629 ("key_getcomb_esp: l=%u > MLEN=%lu", 5630 l, (u_long) MLEN)); 5631 MGET(m, M_DONTWAIT, MT_DATA); 5632 if (m) { 5633 M_ALIGN(m, l); 5634 m->m_len = l; 5635 m->m_next = NULL; 5636 bzero(mtod(m, void *), m->m_len); 5637 } 5638 } 5639 if (!m) 5640 goto fail; 5641 5642 totlen = 0; 5643 for (n = m; n; n = n->m_next) 5644 totlen += n->m_len; 5645 IPSEC_ASSERT((totlen % l) == 0, 5646 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5647 5648 for (off = 0; off < totlen; off += l) { 5649 n = m_pulldown(m, off, l, &o); 5650 if (!n) { 5651 /* m is already freed */ 5652 goto fail; 5653 } 5654 comb = (struct sadb_comb *)(mtod(n, void *) + o); 5655 bzero(comb, sizeof(*comb)); 5656 key_getcomb_setlifetime(comb); 5657 comb->sadb_comb_encrypt = i; 5658 comb->sadb_comb_encrypt_minbits = encmin; 5659 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5660 } 5661 5662 if (!result) 5663 result = m; 5664 else 5665 m_cat(result, m); 5666 } 5667 5668 return result; 5669 5670 fail: 5671 if (result) 5672 m_freem(result); 5673 return NULL; 5674 } 5675 5676 static void 5677 key_getsizes_ah( 5678 const struct auth_hash *ah, 5679 int alg, 5680 u_int16_t* ksmin, 5681 u_int16_t* ksmax) 5682 { 5683 *ksmin = *ksmax = ah->keysize; 5684 if (ah->keysize == 0) { 5685 /* 5686 * Transform takes arbitrary key size but algorithm 5687 * key size is restricted. Enforce this here. 5688 */ 5689 switch (alg) { 5690 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5691 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5692 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 5693 default: 5694 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5695 alg)); 5696 break; 5697 } 5698 } 5699 } 5700 5701 /* 5702 * XXX reorder combinations by preference 5703 */ 5704 static struct mbuf * 5705 key_getcomb_ah() 5706 { 5707 struct sadb_comb *comb; 5708 struct auth_hash *algo; 5709 struct mbuf *m; 5710 u_int16_t minkeysize, maxkeysize; 5711 int i; 5712 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5713 5714 m = NULL; 5715 for (i = 1; i <= SADB_AALG_MAX; i++) { 5716 #if 1 5717 /* we prefer HMAC algorithms, not old algorithms */ 5718 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5719 continue; 5720 #endif 5721 algo = ah_algorithm_lookup(i); 5722 if (!algo) 5723 continue; 5724 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5725 /* discard algorithms with key size smaller than system min */ 5726 if (_BITS(minkeysize) < ipsec_ah_keymin) 5727 continue; 5728 5729 if (!m) { 5730 IPSEC_ASSERT(l <= MLEN, 5731 ("key_getcomb_ah: l=%u > MLEN=%lu", 5732 l, (u_long) MLEN)); 5733 MGET(m, M_DONTWAIT, MT_DATA); 5734 if (m) { 5735 M_ALIGN(m, l); 5736 m->m_len = l; 5737 m->m_next = NULL; 5738 } 5739 } else 5740 M_PREPEND(m, l, M_DONTWAIT); 5741 if (!m) 5742 return NULL; 5743 5744 comb = mtod(m, struct sadb_comb *); 5745 bzero(comb, sizeof(*comb)); 5746 key_getcomb_setlifetime(comb); 5747 comb->sadb_comb_auth = i; 5748 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5749 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5750 } 5751 5752 return m; 5753 } 5754 5755 /* 5756 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 5757 * XXX reorder combinations by preference 5758 */ 5759 static struct mbuf * 5760 key_getcomb_ipcomp() 5761 { 5762 struct sadb_comb *comb; 5763 struct comp_algo *algo; 5764 struct mbuf *m; 5765 int i; 5766 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5767 5768 m = NULL; 5769 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5770 algo = ipcomp_algorithm_lookup(i); 5771 if (!algo) 5772 continue; 5773 5774 if (!m) { 5775 IPSEC_ASSERT(l <= MLEN, 5776 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 5777 l, (u_long) MLEN)); 5778 MGET(m, M_DONTWAIT, MT_DATA); 5779 if (m) { 5780 M_ALIGN(m, l); 5781 m->m_len = l; 5782 m->m_next = NULL; 5783 } 5784 } else 5785 M_PREPEND(m, l, M_DONTWAIT); 5786 if (!m) 5787 return NULL; 5788 5789 comb = mtod(m, struct sadb_comb *); 5790 bzero(comb, sizeof(*comb)); 5791 key_getcomb_setlifetime(comb); 5792 comb->sadb_comb_encrypt = i; 5793 /* what should we set into sadb_comb_*_{min,max}bits? */ 5794 } 5795 5796 return m; 5797 } 5798 5799 /* 5800 * XXX no way to pass mode (transport/tunnel) to userland 5801 * XXX replay checking? 5802 * XXX sysctl interface to ipsec_{ah,esp}_keymin 5803 */ 5804 static struct mbuf * 5805 key_getprop(saidx) 5806 const struct secasindex *saidx; 5807 { 5808 struct sadb_prop *prop; 5809 struct mbuf *m, *n; 5810 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5811 int totlen; 5812 5813 switch (saidx->proto) { 5814 case IPPROTO_ESP: 5815 m = key_getcomb_esp(); 5816 break; 5817 case IPPROTO_AH: 5818 m = key_getcomb_ah(); 5819 break; 5820 case IPPROTO_IPCOMP: 5821 m = key_getcomb_ipcomp(); 5822 break; 5823 default: 5824 return NULL; 5825 } 5826 5827 if (!m) 5828 return NULL; 5829 M_PREPEND(m, l, M_DONTWAIT); 5830 if (!m) 5831 return NULL; 5832 5833 totlen = 0; 5834 for (n = m; n; n = n->m_next) 5835 totlen += n->m_len; 5836 5837 prop = mtod(m, struct sadb_prop *); 5838 bzero(prop, sizeof(*prop)); 5839 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5840 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5841 prop->sadb_prop_replay = 32; /* XXX */ 5842 5843 return m; 5844 } 5845 5846 /* 5847 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5848 * send 5849 * <base, SA, address(SD), (address(P)), x_policy, 5850 * (identity(SD),) (sensitivity,) proposal> 5851 * to KMD, and expect to receive 5852 * <base> with SADB_ACQUIRE if error occurred, 5853 * or 5854 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5855 * from KMD by PF_KEY. 5856 * 5857 * XXX x_policy is outside of RFC2367 (KAME extension). 5858 * XXX sensitivity is not supported. 5859 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5860 * see comment for key_getcomb_ipcomp(). 5861 * 5862 * OUT: 5863 * 0 : succeed 5864 * others: error number 5865 */ 5866 static int 5867 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5868 { 5869 struct mbuf *result = NULL, *m; 5870 #ifndef IPSEC_NONBLOCK_ACQUIRE 5871 struct secacq *newacq; 5872 #endif 5873 u_int8_t satype; 5874 int error = -1; 5875 u_int32_t seq; 5876 5877 /* sanity check */ 5878 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 5879 satype = key_proto2satype(saidx->proto); 5880 IPSEC_ASSERT(satype != 0, 5881 ("key_acquire: null satype, protocol %u", saidx->proto)); 5882 5883 #ifndef IPSEC_NONBLOCK_ACQUIRE 5884 /* 5885 * We never do anything about acquirng SA. There is anather 5886 * solution that kernel blocks to send SADB_ACQUIRE message until 5887 * getting something message from IKEd. In later case, to be 5888 * managed with ACQUIRING list. 5889 */ 5890 /* Get an entry to check whether sending message or not. */ 5891 if ((newacq = key_getacq(saidx)) != NULL) { 5892 if (key_blockacq_count < newacq->count) { 5893 /* reset counter and do send message. */ 5894 newacq->count = 0; 5895 } else { 5896 /* increment counter and do nothing. */ 5897 newacq->count++; 5898 return 0; 5899 } 5900 } else { 5901 /* make new entry for blocking to send SADB_ACQUIRE. */ 5902 if ((newacq = key_newacq(saidx)) == NULL) 5903 return ENOBUFS; 5904 5905 /* add to acqtree */ 5906 LIST_INSERT_HEAD(&acqtree, newacq, chain); 5907 } 5908 #endif 5909 5910 5911 #ifndef IPSEC_NONBLOCK_ACQUIRE 5912 seq = newacq->seq; 5913 #else 5914 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 5915 #endif 5916 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5917 if (!m) { 5918 error = ENOBUFS; 5919 goto fail; 5920 } 5921 result = m; 5922 5923 /* set sadb_address for saidx's. */ 5924 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5925 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5926 if (!m) { 5927 error = ENOBUFS; 5928 goto fail; 5929 } 5930 m_cat(result, m); 5931 5932 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5933 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5934 if (!m) { 5935 error = ENOBUFS; 5936 goto fail; 5937 } 5938 m_cat(result, m); 5939 5940 /* XXX proxy address (optional) */ 5941 5942 /* set sadb_x_policy */ 5943 if (sp) { 5944 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5945 if (!m) { 5946 error = ENOBUFS; 5947 goto fail; 5948 } 5949 m_cat(result, m); 5950 } 5951 5952 /* XXX identity (optional) */ 5953 #if 0 5954 if (idexttype && fqdn) { 5955 /* create identity extension (FQDN) */ 5956 struct sadb_ident *id; 5957 int fqdnlen; 5958 5959 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5960 id = (struct sadb_ident *)p; 5961 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5962 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5963 id->sadb_ident_exttype = idexttype; 5964 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5965 bcopy(fqdn, id + 1, fqdnlen); 5966 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5967 } 5968 5969 if (idexttype) { 5970 /* create identity extension (USERFQDN) */ 5971 struct sadb_ident *id; 5972 int userfqdnlen; 5973 5974 if (userfqdn) { 5975 /* +1 for terminating-NUL */ 5976 userfqdnlen = strlen(userfqdn) + 1; 5977 } else 5978 userfqdnlen = 0; 5979 id = (struct sadb_ident *)p; 5980 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5981 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5982 id->sadb_ident_exttype = idexttype; 5983 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5984 /* XXX is it correct? */ 5985 if (curlwp) 5986 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 5987 if (userfqdn && userfqdnlen) 5988 bcopy(userfqdn, id + 1, userfqdnlen); 5989 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5990 } 5991 #endif 5992 5993 /* XXX sensitivity (optional) */ 5994 5995 /* create proposal/combination extension */ 5996 m = key_getprop(saidx); 5997 #if 0 5998 /* 5999 * spec conformant: always attach proposal/combination extension, 6000 * the problem is that we have no way to attach it for ipcomp, 6001 * due to the way sadb_comb is declared in RFC2367. 6002 */ 6003 if (!m) { 6004 error = ENOBUFS; 6005 goto fail; 6006 } 6007 m_cat(result, m); 6008 #else 6009 /* 6010 * outside of spec; make proposal/combination extension optional. 6011 */ 6012 if (m) 6013 m_cat(result, m); 6014 #endif 6015 6016 if ((result->m_flags & M_PKTHDR) == 0) { 6017 error = EINVAL; 6018 goto fail; 6019 } 6020 6021 if (result->m_len < sizeof(struct sadb_msg)) { 6022 result = m_pullup(result, sizeof(struct sadb_msg)); 6023 if (result == NULL) { 6024 error = ENOBUFS; 6025 goto fail; 6026 } 6027 } 6028 6029 result->m_pkthdr.len = 0; 6030 for (m = result; m; m = m->m_next) 6031 result->m_pkthdr.len += m->m_len; 6032 6033 mtod(result, struct sadb_msg *)->sadb_msg_len = 6034 PFKEY_UNIT64(result->m_pkthdr.len); 6035 6036 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6037 6038 fail: 6039 if (result) 6040 m_freem(result); 6041 return error; 6042 } 6043 6044 #ifndef IPSEC_NONBLOCK_ACQUIRE 6045 static struct secacq * 6046 key_newacq(const struct secasindex *saidx) 6047 { 6048 struct secacq *newacq; 6049 6050 /* get new entry */ 6051 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6052 if (newacq == NULL) { 6053 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6054 return NULL; 6055 } 6056 bzero(newacq, sizeof(*newacq)); 6057 6058 /* copy secindex */ 6059 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6060 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6061 newacq->created = time_second; 6062 newacq->count = 0; 6063 6064 return newacq; 6065 } 6066 6067 static struct secacq * 6068 key_getacq(const struct secasindex *saidx) 6069 { 6070 struct secacq *acq; 6071 6072 LIST_FOREACH(acq, &acqtree, chain) { 6073 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6074 return acq; 6075 } 6076 6077 return NULL; 6078 } 6079 6080 static struct secacq * 6081 key_getacqbyseq(seq) 6082 u_int32_t seq; 6083 { 6084 struct secacq *acq; 6085 6086 LIST_FOREACH(acq, &acqtree, chain) { 6087 if (acq->seq == seq) 6088 return acq; 6089 } 6090 6091 return NULL; 6092 } 6093 #endif 6094 6095 static struct secspacq * 6096 key_newspacq(spidx) 6097 struct secpolicyindex *spidx; 6098 { 6099 struct secspacq *acq; 6100 6101 /* get new entry */ 6102 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6103 if (acq == NULL) { 6104 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6105 return NULL; 6106 } 6107 bzero(acq, sizeof(*acq)); 6108 6109 /* copy secindex */ 6110 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6111 acq->created = time_second; 6112 acq->count = 0; 6113 6114 return acq; 6115 } 6116 6117 static struct secspacq * 6118 key_getspacq(spidx) 6119 struct secpolicyindex *spidx; 6120 { 6121 struct secspacq *acq; 6122 6123 LIST_FOREACH(acq, &spacqtree, chain) { 6124 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6125 return acq; 6126 } 6127 6128 return NULL; 6129 } 6130 6131 /* 6132 * SADB_ACQUIRE processing, 6133 * in first situation, is receiving 6134 * <base> 6135 * from the ikmpd, and clear sequence of its secasvar entry. 6136 * 6137 * In second situation, is receiving 6138 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6139 * from a user land process, and return 6140 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6141 * to the socket. 6142 * 6143 * m will always be freed. 6144 */ 6145 static int 6146 key_acquire2(so, m, mhp) 6147 struct socket *so; 6148 struct mbuf *m; 6149 const struct sadb_msghdr *mhp; 6150 { 6151 const struct sadb_address *src0, *dst0; 6152 struct secasindex saidx; 6153 struct secashead *sah; 6154 u_int16_t proto; 6155 int error; 6156 6157 /* sanity check */ 6158 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6159 panic("key_acquire2: NULL pointer is passed"); 6160 6161 /* 6162 * Error message from KMd. 6163 * We assume that if error was occurred in IKEd, the length of PFKEY 6164 * message is equal to the size of sadb_msg structure. 6165 * We do not raise error even if error occurred in this function. 6166 */ 6167 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6168 #ifndef IPSEC_NONBLOCK_ACQUIRE 6169 struct secacq *acq; 6170 6171 /* check sequence number */ 6172 if (mhp->msg->sadb_msg_seq == 0) { 6173 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6174 m_freem(m); 6175 return 0; 6176 } 6177 6178 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6179 /* 6180 * the specified larval SA is already gone, or we got 6181 * a bogus sequence number. we can silently ignore it. 6182 */ 6183 m_freem(m); 6184 return 0; 6185 } 6186 6187 /* reset acq counter in order to deletion by timehander. */ 6188 acq->created = time_second; 6189 acq->count = 0; 6190 #endif 6191 m_freem(m); 6192 return 0; 6193 } 6194 6195 /* 6196 * This message is from user land. 6197 */ 6198 6199 /* map satype to proto */ 6200 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6201 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6202 return key_senderror(so, m, EINVAL); 6203 } 6204 6205 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6206 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6207 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6208 /* error */ 6209 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6210 return key_senderror(so, m, EINVAL); 6211 } 6212 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6213 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6214 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6215 /* error */ 6216 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6217 return key_senderror(so, m, EINVAL); 6218 } 6219 6220 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6221 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6222 6223 /* XXX boundary check against sa_len */ 6224 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6225 6226 /* get a SA index */ 6227 LIST_FOREACH(sah, &sahtree, chain) { 6228 if (sah->state == SADB_SASTATE_DEAD) 6229 continue; 6230 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6231 break; 6232 } 6233 if (sah != NULL) { 6234 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6235 return key_senderror(so, m, EEXIST); 6236 } 6237 6238 error = key_acquire(&saidx, NULL); 6239 if (error != 0) { 6240 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6241 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6242 return key_senderror(so, m, error); 6243 } 6244 6245 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6246 } 6247 6248 /* 6249 * SADB_REGISTER processing. 6250 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6251 * receive 6252 * <base> 6253 * from the ikmpd, and register a socket to send PF_KEY messages, 6254 * and send 6255 * <base, supported> 6256 * to KMD by PF_KEY. 6257 * If socket is detached, must free from regnode. 6258 * 6259 * m will always be freed. 6260 */ 6261 static int 6262 key_register(so, m, mhp) 6263 struct socket *so; 6264 struct mbuf *m; 6265 const struct sadb_msghdr *mhp; 6266 { 6267 struct secreg *reg, *newreg = 0; 6268 6269 /* sanity check */ 6270 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6271 panic("key_register: NULL pointer is passed"); 6272 6273 /* check for invalid register message */ 6274 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6275 return key_senderror(so, m, EINVAL); 6276 6277 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6278 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6279 goto setmsg; 6280 6281 /* check whether existing or not */ 6282 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6283 if (reg->so == so) { 6284 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6285 return key_senderror(so, m, EEXIST); 6286 } 6287 } 6288 6289 /* create regnode */ 6290 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6291 if (newreg == NULL) { 6292 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6293 return key_senderror(so, m, ENOBUFS); 6294 } 6295 bzero((void *)newreg, sizeof(*newreg)); 6296 6297 newreg->so = so; 6298 ((struct keycb *)sotorawcb(so))->kp_registered++; 6299 6300 /* add regnode to regtree. */ 6301 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6302 6303 setmsg: 6304 { 6305 struct mbuf *n; 6306 struct sadb_msg *newmsg; 6307 struct sadb_supported *sup; 6308 u_int len, alen, elen; 6309 int off; 6310 int i; 6311 struct sadb_alg *alg; 6312 6313 /* create new sadb_msg to reply. */ 6314 alen = 0; 6315 for (i = 1; i <= SADB_AALG_MAX; i++) { 6316 if (ah_algorithm_lookup(i)) 6317 alen += sizeof(struct sadb_alg); 6318 } 6319 if (alen) 6320 alen += sizeof(struct sadb_supported); 6321 elen = 0; 6322 for (i = 1; i <= SADB_EALG_MAX; i++) { 6323 if (esp_algorithm_lookup(i)) 6324 elen += sizeof(struct sadb_alg); 6325 } 6326 if (elen) 6327 elen += sizeof(struct sadb_supported); 6328 6329 len = sizeof(struct sadb_msg) + alen + elen; 6330 6331 if (len > MCLBYTES) 6332 return key_senderror(so, m, ENOBUFS); 6333 6334 MGETHDR(n, M_DONTWAIT, MT_DATA); 6335 if (len > MHLEN) { 6336 MCLGET(n, M_DONTWAIT); 6337 if ((n->m_flags & M_EXT) == 0) { 6338 m_freem(n); 6339 n = NULL; 6340 } 6341 } 6342 if (!n) 6343 return key_senderror(so, m, ENOBUFS); 6344 6345 n->m_pkthdr.len = n->m_len = len; 6346 n->m_next = NULL; 6347 off = 0; 6348 6349 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, void *) + off); 6350 newmsg = mtod(n, struct sadb_msg *); 6351 newmsg->sadb_msg_errno = 0; 6352 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6353 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6354 6355 /* for authentication algorithm */ 6356 if (alen) { 6357 sup = (struct sadb_supported *)(mtod(n, void *) + off); 6358 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6359 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6360 off += PFKEY_ALIGN8(sizeof(*sup)); 6361 6362 for (i = 1; i <= SADB_AALG_MAX; i++) { 6363 struct auth_hash *aalgo; 6364 u_int16_t minkeysize, maxkeysize; 6365 6366 aalgo = ah_algorithm_lookup(i); 6367 if (!aalgo) 6368 continue; 6369 alg = (struct sadb_alg *)(mtod(n, void *) + off); 6370 alg->sadb_alg_id = i; 6371 alg->sadb_alg_ivlen = 0; 6372 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6373 alg->sadb_alg_minbits = _BITS(minkeysize); 6374 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6375 off += PFKEY_ALIGN8(sizeof(*alg)); 6376 } 6377 } 6378 6379 /* for encryption algorithm */ 6380 if (elen) { 6381 sup = (struct sadb_supported *)(mtod(n, void *) + off); 6382 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6383 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6384 off += PFKEY_ALIGN8(sizeof(*sup)); 6385 6386 for (i = 1; i <= SADB_EALG_MAX; i++) { 6387 struct enc_xform *ealgo; 6388 6389 ealgo = esp_algorithm_lookup(i); 6390 if (!ealgo) 6391 continue; 6392 alg = (struct sadb_alg *)(mtod(n, void *) + off); 6393 alg->sadb_alg_id = i; 6394 alg->sadb_alg_ivlen = ealgo->blocksize; 6395 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6396 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6397 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6398 } 6399 } 6400 6401 #ifdef DIAGNOSTIC 6402 if (off != len) 6403 panic("length assumption failed in key_register"); 6404 #endif 6405 6406 m_freem(m); 6407 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6408 } 6409 } 6410 6411 /* 6412 * free secreg entry registered. 6413 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6414 */ 6415 void 6416 key_freereg(so) 6417 struct socket *so; 6418 { 6419 struct secreg *reg; 6420 int i; 6421 6422 /* sanity check */ 6423 if (so == NULL) 6424 panic("key_freereg: NULL pointer is passed"); 6425 6426 /* 6427 * check whether existing or not. 6428 * check all type of SA, because there is a potential that 6429 * one socket is registered to multiple type of SA. 6430 */ 6431 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6432 LIST_FOREACH(reg, ®tree[i], chain) { 6433 if (reg->so == so 6434 && __LIST_CHAINED(reg)) { 6435 LIST_REMOVE(reg, chain); 6436 KFREE(reg); 6437 break; 6438 } 6439 } 6440 } 6441 6442 return; 6443 } 6444 6445 /* 6446 * SADB_EXPIRE processing 6447 * send 6448 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6449 * to KMD by PF_KEY. 6450 * NOTE: We send only soft lifetime extension. 6451 * 6452 * OUT: 0 : succeed 6453 * others : error number 6454 */ 6455 static int 6456 key_expire(sav) 6457 struct secasvar *sav; 6458 { 6459 int s; 6460 int satype; 6461 struct mbuf *result = NULL, *m; 6462 int len; 6463 int error = -1; 6464 struct sadb_lifetime *lt; 6465 6466 /* XXX: Why do we lock ? */ 6467 s = splsoftnet(); /*called from softclock()*/ 6468 6469 /* sanity check */ 6470 if (sav == NULL) 6471 panic("key_expire: NULL pointer is passed"); 6472 if (sav->sah == NULL) 6473 panic("key_expire: Why was SA index in SA NULL"); 6474 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6475 panic("key_expire: invalid proto is passed"); 6476 6477 /* set msg header */ 6478 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6479 if (!m) { 6480 error = ENOBUFS; 6481 goto fail; 6482 } 6483 result = m; 6484 6485 /* create SA extension */ 6486 m = key_setsadbsa(sav); 6487 if (!m) { 6488 error = ENOBUFS; 6489 goto fail; 6490 } 6491 m_cat(result, m); 6492 6493 /* create SA extension */ 6494 m = key_setsadbxsa2(sav->sah->saidx.mode, 6495 sav->replay ? sav->replay->count : 0, 6496 sav->sah->saidx.reqid); 6497 if (!m) { 6498 error = ENOBUFS; 6499 goto fail; 6500 } 6501 m_cat(result, m); 6502 6503 /* create lifetime extension (current and soft) */ 6504 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6505 m = key_alloc_mbuf(len); 6506 if (!m || m->m_next) { /*XXX*/ 6507 if (m) 6508 m_freem(m); 6509 error = ENOBUFS; 6510 goto fail; 6511 } 6512 bzero(mtod(m, void *), len); 6513 lt = mtod(m, struct sadb_lifetime *); 6514 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6515 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6516 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6517 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6518 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6519 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6520 lt = (struct sadb_lifetime *)(mtod(m, void *) + len / 2); 6521 bcopy(sav->lft_s, lt, sizeof(*lt)); 6522 m_cat(result, m); 6523 6524 /* set sadb_address for source */ 6525 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6526 &sav->sah->saidx.src.sa, 6527 FULLMASK, IPSEC_ULPROTO_ANY); 6528 if (!m) { 6529 error = ENOBUFS; 6530 goto fail; 6531 } 6532 m_cat(result, m); 6533 6534 /* set sadb_address for destination */ 6535 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6536 &sav->sah->saidx.dst.sa, 6537 FULLMASK, IPSEC_ULPROTO_ANY); 6538 if (!m) { 6539 error = ENOBUFS; 6540 goto fail; 6541 } 6542 m_cat(result, m); 6543 6544 if ((result->m_flags & M_PKTHDR) == 0) { 6545 error = EINVAL; 6546 goto fail; 6547 } 6548 6549 if (result->m_len < sizeof(struct sadb_msg)) { 6550 result = m_pullup(result, sizeof(struct sadb_msg)); 6551 if (result == NULL) { 6552 error = ENOBUFS; 6553 goto fail; 6554 } 6555 } 6556 6557 result->m_pkthdr.len = 0; 6558 for (m = result; m; m = m->m_next) 6559 result->m_pkthdr.len += m->m_len; 6560 6561 mtod(result, struct sadb_msg *)->sadb_msg_len = 6562 PFKEY_UNIT64(result->m_pkthdr.len); 6563 6564 splx(s); 6565 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6566 6567 fail: 6568 if (result) 6569 m_freem(result); 6570 splx(s); 6571 return error; 6572 } 6573 6574 /* 6575 * SADB_FLUSH processing 6576 * receive 6577 * <base> 6578 * from the ikmpd, and free all entries in secastree. 6579 * and send, 6580 * <base> 6581 * to the ikmpd. 6582 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6583 * 6584 * m will always be freed. 6585 */ 6586 static int 6587 key_flush(so, m, mhp) 6588 struct socket *so; 6589 struct mbuf *m; 6590 const struct sadb_msghdr *mhp; 6591 { 6592 struct sadb_msg *newmsg; 6593 struct secashead *sah, *nextsah; 6594 struct secasvar *sav, *nextsav; 6595 u_int16_t proto; 6596 u_int8_t state; 6597 u_int stateidx; 6598 6599 /* sanity check */ 6600 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6601 panic("key_flush: NULL pointer is passed"); 6602 6603 /* map satype to proto */ 6604 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6605 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6606 return key_senderror(so, m, EINVAL); 6607 } 6608 6609 /* no SATYPE specified, i.e. flushing all SA. */ 6610 for (sah = LIST_FIRST(&sahtree); 6611 sah != NULL; 6612 sah = nextsah) { 6613 nextsah = LIST_NEXT(sah, chain); 6614 6615 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6616 && proto != sah->saidx.proto) 6617 continue; 6618 6619 for (stateidx = 0; 6620 stateidx < _ARRAYLEN(saorder_state_alive); 6621 stateidx++) { 6622 state = saorder_state_any[stateidx]; 6623 for (sav = LIST_FIRST(&sah->savtree[state]); 6624 sav != NULL; 6625 sav = nextsav) { 6626 6627 nextsav = LIST_NEXT(sav, chain); 6628 6629 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6630 KEY_FREESAV(&sav); 6631 } 6632 } 6633 6634 sah->state = SADB_SASTATE_DEAD; 6635 } 6636 6637 if (m->m_len < sizeof(struct sadb_msg) || 6638 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6639 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6640 return key_senderror(so, m, ENOBUFS); 6641 } 6642 6643 if (m->m_next) 6644 m_freem(m->m_next); 6645 m->m_next = NULL; 6646 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6647 newmsg = mtod(m, struct sadb_msg *); 6648 newmsg->sadb_msg_errno = 0; 6649 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6650 6651 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6652 } 6653 6654 6655 static struct mbuf * 6656 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6657 { 6658 struct secashead *sah; 6659 struct secasvar *sav; 6660 u_int16_t proto; 6661 u_int stateidx; 6662 u_int8_t satype; 6663 u_int8_t state; 6664 int cnt; 6665 struct mbuf *m, *n, *prev; 6666 int totlen; 6667 6668 *lenp = 0; 6669 6670 /* map satype to proto */ 6671 if ((proto = key_satype2proto(req_satype)) == 0) { 6672 *errorp = EINVAL; 6673 return (NULL); 6674 } 6675 6676 /* count sav entries to be sent to userland. */ 6677 cnt = 0; 6678 LIST_FOREACH(sah, &sahtree, chain) { 6679 if (req_satype != SADB_SATYPE_UNSPEC && 6680 proto != sah->saidx.proto) 6681 continue; 6682 6683 for (stateidx = 0; 6684 stateidx < _ARRAYLEN(saorder_state_any); 6685 stateidx++) { 6686 state = saorder_state_any[stateidx]; 6687 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6688 cnt++; 6689 } 6690 } 6691 } 6692 6693 if (cnt == 0) { 6694 *errorp = ENOENT; 6695 return (NULL); 6696 } 6697 6698 /* send this to the userland, one at a time. */ 6699 m = NULL; 6700 prev = m; 6701 LIST_FOREACH(sah, &sahtree, chain) { 6702 if (req_satype != SADB_SATYPE_UNSPEC && 6703 proto != sah->saidx.proto) 6704 continue; 6705 6706 /* map proto to satype */ 6707 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6708 m_freem(m); 6709 *errorp = EINVAL; 6710 return (NULL); 6711 } 6712 6713 for (stateidx = 0; 6714 stateidx < _ARRAYLEN(saorder_state_any); 6715 stateidx++) { 6716 state = saorder_state_any[stateidx]; 6717 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6718 n = key_setdumpsa(sav, SADB_DUMP, satype, 6719 --cnt, pid); 6720 if (!n) { 6721 m_freem(m); 6722 *errorp = ENOBUFS; 6723 return (NULL); 6724 } 6725 6726 totlen += n->m_pkthdr.len; 6727 if (!m) 6728 m = n; 6729 else 6730 prev->m_nextpkt = n; 6731 prev = n; 6732 } 6733 } 6734 } 6735 6736 if (!m) { 6737 *errorp = EINVAL; 6738 return (NULL); 6739 } 6740 6741 if ((m->m_flags & M_PKTHDR) != 0) { 6742 m->m_pkthdr.len = 0; 6743 for (n = m; n; n = n->m_next) 6744 m->m_pkthdr.len += n->m_len; 6745 } 6746 6747 *errorp = 0; 6748 return (m); 6749 } 6750 6751 /* 6752 * SADB_DUMP processing 6753 * dump all entries including status of DEAD in SAD. 6754 * receive 6755 * <base> 6756 * from the ikmpd, and dump all secasvar leaves 6757 * and send, 6758 * <base> ..... 6759 * to the ikmpd. 6760 * 6761 * m will always be freed. 6762 */ 6763 static int 6764 key_dump(so, m0, mhp) 6765 struct socket *so; 6766 struct mbuf *m0; 6767 const struct sadb_msghdr *mhp; 6768 { 6769 u_int16_t proto; 6770 u_int8_t satype; 6771 struct mbuf *n; 6772 int s; 6773 int error, len, ok; 6774 6775 /* sanity check */ 6776 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 6777 panic("key_dump: NULL pointer is passed"); 6778 6779 /* map satype to proto */ 6780 satype = mhp->msg->sadb_msg_satype; 6781 if ((proto = key_satype2proto(satype)) == 0) { 6782 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 6783 return key_senderror(so, m0, EINVAL); 6784 } 6785 6786 /* 6787 * If the requestor has insufficient socket-buffer space 6788 * for the entire chain, nobody gets any response to the DUMP. 6789 * XXX For now, only the requestor ever gets anything. 6790 * Moreover, if the requestor has any space at all, they receive 6791 * the entire chain, otherwise the request is refused with ENOBUFS. 6792 */ 6793 if (sbspace(&so->so_rcv) <= 0) { 6794 return key_senderror(so, m0, ENOBUFS); 6795 } 6796 6797 s = splsoftnet(); 6798 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 6799 splx(s); 6800 6801 if (n == NULL) { 6802 return key_senderror(so, m0, ENOENT); 6803 } 6804 pfkeystat.in_total++; 6805 pfkeystat.in_bytes += len; 6806 6807 /* 6808 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 6809 * The requestor receives either the entire chain, or an 6810 * error message with ENOBUFS. 6811 * 6812 * sbappendaddrchain() takes the chain of entries, one 6813 * packet-record per SPD entry, prepends the key_src sockaddr 6814 * to each packet-record, links the sockaddr mbufs into a new 6815 * list of records, then appends the entire resulting 6816 * list to the requesting socket. 6817 */ 6818 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 6819 n, SB_PRIO_ONESHOT_OVERFLOW); 6820 6821 if (!ok) { 6822 pfkeystat.in_nomem++; 6823 m_freem(n); 6824 return key_senderror(so, m0, ENOBUFS); 6825 } 6826 6827 m_freem(m0); 6828 return 0; 6829 } 6830 6831 /* 6832 * SADB_X_PROMISC processing 6833 * 6834 * m will always be freed. 6835 */ 6836 static int 6837 key_promisc(so, m, mhp) 6838 struct socket *so; 6839 struct mbuf *m; 6840 const struct sadb_msghdr *mhp; 6841 { 6842 int olen; 6843 6844 /* sanity check */ 6845 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6846 panic("key_promisc: NULL pointer is passed"); 6847 6848 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6849 6850 if (olen < sizeof(struct sadb_msg)) { 6851 #if 1 6852 return key_senderror(so, m, EINVAL); 6853 #else 6854 m_freem(m); 6855 return 0; 6856 #endif 6857 } else if (olen == sizeof(struct sadb_msg)) { 6858 /* enable/disable promisc mode */ 6859 struct keycb *kp; 6860 6861 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6862 return key_senderror(so, m, EINVAL); 6863 mhp->msg->sadb_msg_errno = 0; 6864 switch (mhp->msg->sadb_msg_satype) { 6865 case 0: 6866 case 1: 6867 kp->kp_promisc = mhp->msg->sadb_msg_satype; 6868 break; 6869 default: 6870 return key_senderror(so, m, EINVAL); 6871 } 6872 6873 /* send the original message back to everyone */ 6874 mhp->msg->sadb_msg_errno = 0; 6875 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6876 } else { 6877 /* send packet as is */ 6878 6879 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6880 6881 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6882 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6883 } 6884 } 6885 6886 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6887 const struct sadb_msghdr *)) = { 6888 NULL, /* SADB_RESERVED */ 6889 key_getspi, /* SADB_GETSPI */ 6890 key_update, /* SADB_UPDATE */ 6891 key_add, /* SADB_ADD */ 6892 key_delete, /* SADB_DELETE */ 6893 key_get, /* SADB_GET */ 6894 key_acquire2, /* SADB_ACQUIRE */ 6895 key_register, /* SADB_REGISTER */ 6896 NULL, /* SADB_EXPIRE */ 6897 key_flush, /* SADB_FLUSH */ 6898 key_dump, /* SADB_DUMP */ 6899 key_promisc, /* SADB_X_PROMISC */ 6900 NULL, /* SADB_X_PCHANGE */ 6901 key_spdadd, /* SADB_X_SPDUPDATE */ 6902 key_spdadd, /* SADB_X_SPDADD */ 6903 key_spddelete, /* SADB_X_SPDDELETE */ 6904 key_spdget, /* SADB_X_SPDGET */ 6905 NULL, /* SADB_X_SPDACQUIRE */ 6906 key_spddump, /* SADB_X_SPDDUMP */ 6907 key_spdflush, /* SADB_X_SPDFLUSH */ 6908 key_spdadd, /* SADB_X_SPDSETIDX */ 6909 NULL, /* SADB_X_SPDEXPIRE */ 6910 key_spddelete2, /* SADB_X_SPDDELETE2 */ 6911 NULL, /* SADB_X_NAT_T_NEW_MAPPING */ 6912 }; 6913 6914 /* 6915 * parse sadb_msg buffer to process PFKEYv2, 6916 * and create a data to response if needed. 6917 * I think to be dealed with mbuf directly. 6918 * IN: 6919 * msgp : pointer to pointer to a received buffer pulluped. 6920 * This is rewrited to response. 6921 * so : pointer to socket. 6922 * OUT: 6923 * length for buffer to send to user process. 6924 */ 6925 int 6926 key_parse(m, so) 6927 struct mbuf *m; 6928 struct socket *so; 6929 { 6930 struct sadb_msg *msg; 6931 struct sadb_msghdr mh; 6932 u_int orglen; 6933 int error; 6934 int target; 6935 6936 /* sanity check */ 6937 if (m == NULL || so == NULL) 6938 panic("key_parse: NULL pointer is passed"); 6939 6940 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6941 KEYDEBUG(KEYDEBUG_KEY_DUMP, 6942 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 6943 kdebug_sadb(msg)); 6944 #endif 6945 6946 if (m->m_len < sizeof(struct sadb_msg)) { 6947 m = m_pullup(m, sizeof(struct sadb_msg)); 6948 if (!m) 6949 return ENOBUFS; 6950 } 6951 msg = mtod(m, struct sadb_msg *); 6952 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6953 target = KEY_SENDUP_ONE; 6954 6955 if ((m->m_flags & M_PKTHDR) == 0 || 6956 m->m_pkthdr.len != m->m_pkthdr.len) { 6957 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 6958 pfkeystat.out_invlen++; 6959 error = EINVAL; 6960 goto senderror; 6961 } 6962 6963 if (msg->sadb_msg_version != PF_KEY_V2) { 6964 ipseclog((LOG_DEBUG, 6965 "key_parse: PF_KEY version %u is mismatched.\n", 6966 msg->sadb_msg_version)); 6967 pfkeystat.out_invver++; 6968 error = EINVAL; 6969 goto senderror; 6970 } 6971 6972 if (msg->sadb_msg_type > SADB_MAX) { 6973 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6974 msg->sadb_msg_type)); 6975 pfkeystat.out_invmsgtype++; 6976 error = EINVAL; 6977 goto senderror; 6978 } 6979 6980 /* for old-fashioned code - should be nuked */ 6981 if (m->m_pkthdr.len > MCLBYTES) { 6982 m_freem(m); 6983 return ENOBUFS; 6984 } 6985 if (m->m_next) { 6986 struct mbuf *n; 6987 6988 MGETHDR(n, M_DONTWAIT, MT_DATA); 6989 if (n && m->m_pkthdr.len > MHLEN) { 6990 MCLGET(n, M_DONTWAIT); 6991 if ((n->m_flags & M_EXT) == 0) { 6992 m_free(n); 6993 n = NULL; 6994 } 6995 } 6996 if (!n) { 6997 m_freem(m); 6998 return ENOBUFS; 6999 } 7000 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7001 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7002 n->m_next = NULL; 7003 m_freem(m); 7004 m = n; 7005 } 7006 7007 /* align the mbuf chain so that extensions are in contiguous region. */ 7008 error = key_align(m, &mh); 7009 if (error) 7010 return error; 7011 7012 if (m->m_next) { /*XXX*/ 7013 m_freem(m); 7014 return ENOBUFS; 7015 } 7016 7017 msg = mh.msg; 7018 7019 /* check SA type */ 7020 switch (msg->sadb_msg_satype) { 7021 case SADB_SATYPE_UNSPEC: 7022 switch (msg->sadb_msg_type) { 7023 case SADB_GETSPI: 7024 case SADB_UPDATE: 7025 case SADB_ADD: 7026 case SADB_DELETE: 7027 case SADB_GET: 7028 case SADB_ACQUIRE: 7029 case SADB_EXPIRE: 7030 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7031 "when msg type=%u.\n", msg->sadb_msg_type)); 7032 pfkeystat.out_invsatype++; 7033 error = EINVAL; 7034 goto senderror; 7035 } 7036 break; 7037 case SADB_SATYPE_AH: 7038 case SADB_SATYPE_ESP: 7039 case SADB_X_SATYPE_IPCOMP: 7040 case SADB_X_SATYPE_TCPSIGNATURE: 7041 switch (msg->sadb_msg_type) { 7042 case SADB_X_SPDADD: 7043 case SADB_X_SPDDELETE: 7044 case SADB_X_SPDGET: 7045 case SADB_X_SPDDUMP: 7046 case SADB_X_SPDFLUSH: 7047 case SADB_X_SPDSETIDX: 7048 case SADB_X_SPDUPDATE: 7049 case SADB_X_SPDDELETE2: 7050 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7051 msg->sadb_msg_type)); 7052 pfkeystat.out_invsatype++; 7053 error = EINVAL; 7054 goto senderror; 7055 } 7056 break; 7057 case SADB_SATYPE_RSVP: 7058 case SADB_SATYPE_OSPFV2: 7059 case SADB_SATYPE_RIPV2: 7060 case SADB_SATYPE_MIP: 7061 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7062 msg->sadb_msg_satype)); 7063 pfkeystat.out_invsatype++; 7064 error = EOPNOTSUPP; 7065 goto senderror; 7066 case 1: /* XXX: What does it do? */ 7067 if (msg->sadb_msg_type == SADB_X_PROMISC) 7068 break; 7069 /*FALLTHROUGH*/ 7070 default: 7071 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7072 msg->sadb_msg_satype)); 7073 pfkeystat.out_invsatype++; 7074 error = EINVAL; 7075 goto senderror; 7076 } 7077 7078 /* check field of upper layer protocol and address family */ 7079 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7080 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7081 struct sadb_address *src0, *dst0; 7082 u_int plen; 7083 7084 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7085 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7086 7087 /* check upper layer protocol */ 7088 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7089 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7090 pfkeystat.out_invaddr++; 7091 error = EINVAL; 7092 goto senderror; 7093 } 7094 7095 /* check family */ 7096 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7097 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7098 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7099 pfkeystat.out_invaddr++; 7100 error = EINVAL; 7101 goto senderror; 7102 } 7103 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7104 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7105 ipseclog((LOG_DEBUG, 7106 "key_parse: address struct size mismatched.\n")); 7107 pfkeystat.out_invaddr++; 7108 error = EINVAL; 7109 goto senderror; 7110 } 7111 7112 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7113 case AF_INET: 7114 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7115 sizeof(struct sockaddr_in)) { 7116 pfkeystat.out_invaddr++; 7117 error = EINVAL; 7118 goto senderror; 7119 } 7120 break; 7121 case AF_INET6: 7122 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7123 sizeof(struct sockaddr_in6)) { 7124 pfkeystat.out_invaddr++; 7125 error = EINVAL; 7126 goto senderror; 7127 } 7128 break; 7129 default: 7130 ipseclog((LOG_DEBUG, 7131 "key_parse: unsupported address family.\n")); 7132 pfkeystat.out_invaddr++; 7133 error = EAFNOSUPPORT; 7134 goto senderror; 7135 } 7136 7137 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7138 case AF_INET: 7139 plen = sizeof(struct in_addr) << 3; 7140 break; 7141 case AF_INET6: 7142 plen = sizeof(struct in6_addr) << 3; 7143 break; 7144 default: 7145 plen = 0; /*fool gcc*/ 7146 break; 7147 } 7148 7149 /* check max prefix length */ 7150 if (src0->sadb_address_prefixlen > plen || 7151 dst0->sadb_address_prefixlen > plen) { 7152 ipseclog((LOG_DEBUG, 7153 "key_parse: illegal prefixlen.\n")); 7154 pfkeystat.out_invaddr++; 7155 error = EINVAL; 7156 goto senderror; 7157 } 7158 7159 /* 7160 * prefixlen == 0 is valid because there can be a case when 7161 * all addresses are matched. 7162 */ 7163 } 7164 7165 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7166 key_typesw[msg->sadb_msg_type] == NULL) { 7167 pfkeystat.out_invmsgtype++; 7168 error = EINVAL; 7169 goto senderror; 7170 } 7171 7172 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7173 7174 senderror: 7175 msg->sadb_msg_errno = error; 7176 return key_sendup_mbuf(so, m, target); 7177 } 7178 7179 static int 7180 key_senderror(so, m, code) 7181 struct socket *so; 7182 struct mbuf *m; 7183 int code; 7184 { 7185 struct sadb_msg *msg; 7186 7187 if (m->m_len < sizeof(struct sadb_msg)) 7188 panic("invalid mbuf passed to key_senderror"); 7189 7190 msg = mtod(m, struct sadb_msg *); 7191 msg->sadb_msg_errno = code; 7192 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7193 } 7194 7195 /* 7196 * set the pointer to each header into message buffer. 7197 * m will be freed on error. 7198 * XXX larger-than-MCLBYTES extension? 7199 */ 7200 static int 7201 key_align(m, mhp) 7202 struct mbuf *m; 7203 struct sadb_msghdr *mhp; 7204 { 7205 struct mbuf *n; 7206 struct sadb_ext *ext; 7207 size_t off, end; 7208 int extlen; 7209 int toff; 7210 7211 /* sanity check */ 7212 if (m == NULL || mhp == NULL) 7213 panic("key_align: NULL pointer is passed"); 7214 if (m->m_len < sizeof(struct sadb_msg)) 7215 panic("invalid mbuf passed to key_align"); 7216 7217 /* initialize */ 7218 bzero(mhp, sizeof(*mhp)); 7219 7220 mhp->msg = mtod(m, struct sadb_msg *); 7221 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7222 7223 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7224 extlen = end; /*just in case extlen is not updated*/ 7225 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7226 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7227 if (!n) { 7228 /* m is already freed */ 7229 return ENOBUFS; 7230 } 7231 ext = (struct sadb_ext *)(mtod(n, void *) + toff); 7232 7233 /* set pointer */ 7234 switch (ext->sadb_ext_type) { 7235 case SADB_EXT_SA: 7236 case SADB_EXT_ADDRESS_SRC: 7237 case SADB_EXT_ADDRESS_DST: 7238 case SADB_EXT_ADDRESS_PROXY: 7239 case SADB_EXT_LIFETIME_CURRENT: 7240 case SADB_EXT_LIFETIME_HARD: 7241 case SADB_EXT_LIFETIME_SOFT: 7242 case SADB_EXT_KEY_AUTH: 7243 case SADB_EXT_KEY_ENCRYPT: 7244 case SADB_EXT_IDENTITY_SRC: 7245 case SADB_EXT_IDENTITY_DST: 7246 case SADB_EXT_SENSITIVITY: 7247 case SADB_EXT_PROPOSAL: 7248 case SADB_EXT_SUPPORTED_AUTH: 7249 case SADB_EXT_SUPPORTED_ENCRYPT: 7250 case SADB_EXT_SPIRANGE: 7251 case SADB_X_EXT_POLICY: 7252 case SADB_X_EXT_SA2: 7253 /* duplicate check */ 7254 /* 7255 * XXX Are there duplication payloads of either 7256 * KEY_AUTH or KEY_ENCRYPT ? 7257 */ 7258 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7259 ipseclog((LOG_DEBUG, 7260 "key_align: duplicate ext_type %u " 7261 "is passed.\n", ext->sadb_ext_type)); 7262 m_freem(m); 7263 pfkeystat.out_dupext++; 7264 return EINVAL; 7265 } 7266 break; 7267 default: 7268 ipseclog((LOG_DEBUG, 7269 "key_align: invalid ext_type %u is passed.\n", 7270 ext->sadb_ext_type)); 7271 m_freem(m); 7272 pfkeystat.out_invexttype++; 7273 return EINVAL; 7274 } 7275 7276 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7277 7278 if (key_validate_ext(ext, extlen)) { 7279 m_freem(m); 7280 pfkeystat.out_invlen++; 7281 return EINVAL; 7282 } 7283 7284 n = m_pulldown(m, off, extlen, &toff); 7285 if (!n) { 7286 /* m is already freed */ 7287 return ENOBUFS; 7288 } 7289 ext = (struct sadb_ext *)(mtod(n, void *) + toff); 7290 7291 mhp->ext[ext->sadb_ext_type] = ext; 7292 mhp->extoff[ext->sadb_ext_type] = off; 7293 mhp->extlen[ext->sadb_ext_type] = extlen; 7294 } 7295 7296 if (off != end) { 7297 m_freem(m); 7298 pfkeystat.out_invlen++; 7299 return EINVAL; 7300 } 7301 7302 return 0; 7303 } 7304 7305 static int 7306 key_validate_ext(ext, len) 7307 const struct sadb_ext *ext; 7308 int len; 7309 { 7310 const struct sockaddr *sa; 7311 enum { NONE, ADDR } checktype = NONE; 7312 int baselen = 0; 7313 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7314 7315 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7316 return EINVAL; 7317 7318 /* if it does not match minimum/maximum length, bail */ 7319 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7320 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7321 return EINVAL; 7322 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7323 return EINVAL; 7324 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7325 return EINVAL; 7326 7327 /* more checks based on sadb_ext_type XXX need more */ 7328 switch (ext->sadb_ext_type) { 7329 case SADB_EXT_ADDRESS_SRC: 7330 case SADB_EXT_ADDRESS_DST: 7331 case SADB_EXT_ADDRESS_PROXY: 7332 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7333 checktype = ADDR; 7334 break; 7335 case SADB_EXT_IDENTITY_SRC: 7336 case SADB_EXT_IDENTITY_DST: 7337 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7338 SADB_X_IDENTTYPE_ADDR) { 7339 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7340 checktype = ADDR; 7341 } else 7342 checktype = NONE; 7343 break; 7344 default: 7345 checktype = NONE; 7346 break; 7347 } 7348 7349 switch (checktype) { 7350 case NONE: 7351 break; 7352 case ADDR: 7353 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7354 if (len < baselen + sal) 7355 return EINVAL; 7356 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7357 return EINVAL; 7358 break; 7359 } 7360 7361 return 0; 7362 } 7363 7364 void 7365 key_init() 7366 { 7367 int i; 7368 7369 callout_init(&key_timehandler_ch); 7370 7371 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7372 LIST_INIT(&sptree[i]); 7373 } 7374 7375 LIST_INIT(&sahtree); 7376 7377 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7378 LIST_INIT(®tree[i]); 7379 } 7380 7381 #ifndef IPSEC_NONBLOCK_ACQUIRE 7382 LIST_INIT(&acqtree); 7383 #endif 7384 LIST_INIT(&spacqtree); 7385 7386 /* system default */ 7387 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7388 ip4_def_policy.refcnt++; /*never reclaim this*/ 7389 7390 7391 #ifndef IPSEC_DEBUG2 7392 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 7393 #endif /*IPSEC_DEBUG2*/ 7394 7395 /* initialize key statistics */ 7396 keystat.getspi_count = 1; 7397 7398 printf("IPsec: Initialized Security Association Processing.\n"); 7399 7400 return; 7401 } 7402 7403 /* 7404 * XXX: maybe This function is called after INBOUND IPsec processing. 7405 * 7406 * Special check for tunnel-mode packets. 7407 * We must make some checks for consistency between inner and outer IP header. 7408 * 7409 * xxx more checks to be provided 7410 */ 7411 int 7412 key_checktunnelsanity( 7413 struct secasvar *sav, 7414 u_int family, 7415 void *src, 7416 void *dst 7417 ) 7418 { 7419 /* sanity check */ 7420 if (sav->sah == NULL) 7421 panic("sav->sah == NULL at key_checktunnelsanity"); 7422 7423 /* XXX: check inner IP header */ 7424 7425 return 1; 7426 } 7427 7428 #if 0 7429 #define hostnamelen strlen(hostname) 7430 7431 /* 7432 * Get FQDN for the host. 7433 * If the administrator configured hostname (by hostname(1)) without 7434 * domain name, returns nothing. 7435 */ 7436 static const char * 7437 key_getfqdn() 7438 { 7439 int i; 7440 int hasdot; 7441 static char fqdn[MAXHOSTNAMELEN + 1]; 7442 7443 if (!hostnamelen) 7444 return NULL; 7445 7446 /* check if it comes with domain name. */ 7447 hasdot = 0; 7448 for (i = 0; i < hostnamelen; i++) { 7449 if (hostname[i] == '.') 7450 hasdot++; 7451 } 7452 if (!hasdot) 7453 return NULL; 7454 7455 /* NOTE: hostname may not be NUL-terminated. */ 7456 bzero(fqdn, sizeof(fqdn)); 7457 bcopy(hostname, fqdn, hostnamelen); 7458 fqdn[hostnamelen] = '\0'; 7459 return fqdn; 7460 } 7461 7462 /* 7463 * get username@FQDN for the host/user. 7464 */ 7465 static const char * 7466 key_getuserfqdn() 7467 { 7468 const char *host; 7469 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7470 struct proc *p = curproc; 7471 char *q; 7472 7473 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7474 return NULL; 7475 if (!(host = key_getfqdn())) 7476 return NULL; 7477 7478 /* NOTE: s_login may not be-NUL terminated. */ 7479 bzero(userfqdn, sizeof(userfqdn)); 7480 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7481 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7482 q = userfqdn + strlen(userfqdn); 7483 *q++ = '@'; 7484 bcopy(host, q, strlen(host)); 7485 q += strlen(host); 7486 *q++ = '\0'; 7487 7488 return userfqdn; 7489 } 7490 #endif 7491 7492 /* record data transfer on SA, and update timestamps */ 7493 void 7494 key_sa_recordxfer(sav, m) 7495 struct secasvar *sav; 7496 struct mbuf *m; 7497 { 7498 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7499 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7500 if (!sav->lft_c) 7501 return; 7502 7503 /* 7504 * XXX Currently, there is a difference of bytes size 7505 * between inbound and outbound processing. 7506 */ 7507 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7508 /* to check bytes lifetime is done in key_timehandler(). */ 7509 7510 /* 7511 * We use the number of packets as the unit of 7512 * sadb_lifetime_allocations. We increment the variable 7513 * whenever {esp,ah}_{in,out}put is called. 7514 */ 7515 sav->lft_c->sadb_lifetime_allocations++; 7516 /* XXX check for expires? */ 7517 7518 /* 7519 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7520 * in seconds. HARD and SOFT lifetime are measured by the time 7521 * difference (again in seconds) from sadb_lifetime_usetime. 7522 * 7523 * usetime 7524 * v expire expire 7525 * -----+-----+--------+---> t 7526 * <--------------> HARD 7527 * <-----> SOFT 7528 */ 7529 sav->lft_c->sadb_lifetime_usetime = time_second; 7530 /* XXX check for expires? */ 7531 7532 return; 7533 } 7534 7535 /* dumb version */ 7536 void 7537 key_sa_routechange(dst) 7538 struct sockaddr *dst; 7539 { 7540 struct secashead *sah; 7541 struct route *ro; 7542 7543 LIST_FOREACH(sah, &sahtree, chain) { 7544 ro = &sah->sa_route; 7545 if (dst->sa_len == rtcache_getdst(ro)->sa_len && 7546 memcmp(dst, rtcache_getdst(ro), dst->sa_len) == 0) 7547 rtcache_free(ro); 7548 } 7549 7550 return; 7551 } 7552 7553 static void 7554 key_sa_chgstate(sav, state) 7555 struct secasvar *sav; 7556 u_int8_t state; 7557 { 7558 if (sav == NULL) 7559 panic("key_sa_chgstate called with sav == NULL"); 7560 7561 if (sav->state == state) 7562 return; 7563 7564 if (__LIST_CHAINED(sav)) 7565 LIST_REMOVE(sav, chain); 7566 7567 sav->state = state; 7568 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7569 } 7570 7571 void 7572 key_sa_stir_iv(sav) 7573 struct secasvar *sav; 7574 { 7575 7576 if (!sav->iv) 7577 panic("key_sa_stir_iv called with sav == NULL"); 7578 key_randomfill(sav->iv, sav->ivlen); 7579 } 7580 7581 /* XXX too much? */ 7582 static struct mbuf * 7583 key_alloc_mbuf(l) 7584 int l; 7585 { 7586 struct mbuf *m = NULL, *n; 7587 int len, t; 7588 7589 len = l; 7590 while (len > 0) { 7591 MGET(n, M_DONTWAIT, MT_DATA); 7592 if (n && len > MLEN) 7593 MCLGET(n, M_DONTWAIT); 7594 if (!n) { 7595 m_freem(m); 7596 return NULL; 7597 } 7598 7599 n->m_next = NULL; 7600 n->m_len = 0; 7601 n->m_len = M_TRAILINGSPACE(n); 7602 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7603 if (n->m_len > len) { 7604 t = (n->m_len - len) & ~(sizeof(long) - 1); 7605 n->m_data += t; 7606 n->m_len = len; 7607 } 7608 7609 len -= n->m_len; 7610 7611 if (m) 7612 m_cat(m, n); 7613 else 7614 m = n; 7615 } 7616 7617 return m; 7618 } 7619 7620 static struct mbuf * 7621 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7622 { 7623 struct secashead *sah; 7624 struct secasvar *sav; 7625 u_int16_t proto; 7626 u_int stateidx; 7627 u_int8_t satype; 7628 u_int8_t state; 7629 int cnt; 7630 struct mbuf *m, *n; 7631 7632 /* map satype to proto */ 7633 if ((proto = key_satype2proto(req_satype)) == 0) { 7634 *errorp = EINVAL; 7635 return (NULL); 7636 } 7637 7638 /* count sav entries to be sent to the userland. */ 7639 cnt = 0; 7640 LIST_FOREACH(sah, &sahtree, chain) { 7641 if (req_satype != SADB_SATYPE_UNSPEC && 7642 proto != sah->saidx.proto) 7643 continue; 7644 7645 for (stateidx = 0; 7646 stateidx < _ARRAYLEN(saorder_state_any); 7647 stateidx++) { 7648 state = saorder_state_any[stateidx]; 7649 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7650 cnt++; 7651 } 7652 } 7653 } 7654 7655 if (cnt == 0) { 7656 *errorp = ENOENT; 7657 return (NULL); 7658 } 7659 7660 /* send this to the userland, one at a time. */ 7661 m = NULL; 7662 LIST_FOREACH(sah, &sahtree, chain) { 7663 if (req_satype != SADB_SATYPE_UNSPEC && 7664 proto != sah->saidx.proto) 7665 continue; 7666 7667 /* map proto to satype */ 7668 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7669 m_freem(m); 7670 *errorp = EINVAL; 7671 return (NULL); 7672 } 7673 7674 for (stateidx = 0; 7675 stateidx < _ARRAYLEN(saorder_state_any); 7676 stateidx++) { 7677 state = saorder_state_any[stateidx]; 7678 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7679 n = key_setdumpsa(sav, SADB_DUMP, satype, 7680 --cnt, pid); 7681 if (!n) { 7682 m_freem(m); 7683 *errorp = ENOBUFS; 7684 return (NULL); 7685 } 7686 7687 if (!m) 7688 m = n; 7689 else 7690 m_cat(m, n); 7691 } 7692 } 7693 } 7694 7695 if (!m) { 7696 *errorp = EINVAL; 7697 return (NULL); 7698 } 7699 7700 if ((m->m_flags & M_PKTHDR) != 0) { 7701 m->m_pkthdr.len = 0; 7702 for (n = m; n; n = n->m_next) 7703 m->m_pkthdr.len += n->m_len; 7704 } 7705 7706 *errorp = 0; 7707 return (m); 7708 } 7709 7710 static struct mbuf * 7711 key_setspddump(int *errorp, pid_t pid) 7712 { 7713 struct secpolicy *sp; 7714 int cnt; 7715 u_int dir; 7716 struct mbuf *m, *n; 7717 7718 /* search SPD entry and get buffer size. */ 7719 cnt = 0; 7720 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7721 LIST_FOREACH(sp, &sptree[dir], chain) { 7722 cnt++; 7723 } 7724 } 7725 7726 if (cnt == 0) { 7727 *errorp = ENOENT; 7728 return (NULL); 7729 } 7730 7731 m = NULL; 7732 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7733 LIST_FOREACH(sp, &sptree[dir], chain) { 7734 --cnt; 7735 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7736 7737 if (!n) { 7738 *errorp = ENOBUFS; 7739 m_freem(m); 7740 return (NULL); 7741 } 7742 if (!m) 7743 m = n; 7744 else { 7745 m->m_pkthdr.len += n->m_pkthdr.len; 7746 m_cat(m, n); 7747 } 7748 } 7749 } 7750 7751 *errorp = 0; 7752 return (m); 7753 } 7754 7755 static int 7756 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 7757 { 7758 struct mbuf *m, *n; 7759 int err2 = 0; 7760 char *p, *ep; 7761 size_t len; 7762 int s, error; 7763 7764 if (newp) 7765 return (EPERM); 7766 if (namelen != 1) 7767 return (EINVAL); 7768 7769 s = splsoftnet(); 7770 m = key_setdump(name[0], &error, l->l_proc->p_pid); 7771 splx(s); 7772 if (!m) 7773 return (error); 7774 if (!oldp) 7775 *oldlenp = m->m_pkthdr.len; 7776 else { 7777 p = oldp; 7778 if (*oldlenp < m->m_pkthdr.len) { 7779 err2 = ENOMEM; 7780 ep = p + *oldlenp; 7781 } else { 7782 *oldlenp = m->m_pkthdr.len; 7783 ep = p + m->m_pkthdr.len; 7784 } 7785 for (n = m; n; n = n->m_next) { 7786 len = (ep - p < n->m_len) ? 7787 ep - p : n->m_len; 7788 error = copyout(mtod(n, const void *), p, len); 7789 p += len; 7790 if (error) 7791 break; 7792 } 7793 if (error == 0) 7794 error = err2; 7795 } 7796 m_freem(m); 7797 7798 return (error); 7799 } 7800 7801 static int 7802 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 7803 { 7804 struct mbuf *m, *n; 7805 int err2 = 0; 7806 char *p, *ep; 7807 size_t len; 7808 int s, error; 7809 7810 if (newp) 7811 return (EPERM); 7812 if (namelen != 0) 7813 return (EINVAL); 7814 7815 s = splsoftnet(); 7816 m = key_setspddump(&error, l->l_proc->p_pid); 7817 splx(s); 7818 if (!m) 7819 return (error); 7820 if (!oldp) 7821 *oldlenp = m->m_pkthdr.len; 7822 else { 7823 p = oldp; 7824 if (*oldlenp < m->m_pkthdr.len) { 7825 err2 = ENOMEM; 7826 ep = p + *oldlenp; 7827 } else { 7828 *oldlenp = m->m_pkthdr.len; 7829 ep = p + m->m_pkthdr.len; 7830 } 7831 for (n = m; n; n = n->m_next) { 7832 len = (ep - p < n->m_len) ? 7833 ep - p : n->m_len; 7834 error = copyout(mtod(n, const void *), p, len); 7835 p += len; 7836 if (error) 7837 break; 7838 } 7839 if (error == 0) 7840 error = err2; 7841 } 7842 m_freem(m); 7843 7844 return (error); 7845 } 7846 7847 /* 7848 * Create sysctl tree for native FAST_IPSEC key knobs, originally 7849 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 7850 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 7851 * and in any case the part of our sysctl namespace used for dumping the 7852 * SPD and SA database *HAS* to be compatible with the KAME sysctl 7853 * namespace, for API reasons. 7854 * 7855 * Pending a consensus on the right way to fix this, add a level of 7856 * indirection in how we number the `native' FAST_IPSEC key nodes; 7857 * and (as requested by Andrew Brown) move registration of the 7858 * KAME-compatible names to a separate function. 7859 */ 7860 #if 0 7861 # define FAST_IPSEC_PFKEY PF_KEY_V2 7862 # define FAST_IPSEC_PFKEY_NAME "keyv2" 7863 #else 7864 # define FAST_IPSEC_PFKEY PF_KEY 7865 # define FAST_IPSEC_PFKEY_NAME "key" 7866 #endif 7867 7868 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 7869 { 7870 7871 sysctl_createv(clog, 0, NULL, NULL, 7872 CTLFLAG_PERMANENT, 7873 CTLTYPE_NODE, "net", NULL, 7874 NULL, 0, NULL, 0, 7875 CTL_NET, CTL_EOL); 7876 sysctl_createv(clog, 0, NULL, NULL, 7877 CTLFLAG_PERMANENT, 7878 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 7879 NULL, 0, NULL, 0, 7880 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 7881 7882 sysctl_createv(clog, 0, NULL, NULL, 7883 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7884 CTLTYPE_INT, "debug", NULL, 7885 NULL, 0, &key_debug_level, 0, 7886 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 7887 sysctl_createv(clog, 0, NULL, NULL, 7888 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7889 CTLTYPE_INT, "spi_try", NULL, 7890 NULL, 0, &key_spi_trycnt, 0, 7891 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 7892 sysctl_createv(clog, 0, NULL, NULL, 7893 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7894 CTLTYPE_INT, "spi_min_value", NULL, 7895 NULL, 0, &key_spi_minval, 0, 7896 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 7897 sysctl_createv(clog, 0, NULL, NULL, 7898 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7899 CTLTYPE_INT, "spi_max_value", NULL, 7900 NULL, 0, &key_spi_maxval, 0, 7901 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 7902 sysctl_createv(clog, 0, NULL, NULL, 7903 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7904 CTLTYPE_INT, "random_int", NULL, 7905 NULL, 0, &key_int_random, 0, 7906 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 7907 sysctl_createv(clog, 0, NULL, NULL, 7908 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7909 CTLTYPE_INT, "larval_lifetime", NULL, 7910 NULL, 0, &key_larval_lifetime, 0, 7911 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 7912 sysctl_createv(clog, 0, NULL, NULL, 7913 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7914 CTLTYPE_INT, "blockacq_count", NULL, 7915 NULL, 0, &key_blockacq_count, 0, 7916 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 7917 sysctl_createv(clog, 0, NULL, NULL, 7918 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7919 CTLTYPE_INT, "blockacq_lifetime", NULL, 7920 NULL, 0, &key_blockacq_lifetime, 0, 7921 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 7922 sysctl_createv(clog, 0, NULL, NULL, 7923 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7924 CTLTYPE_INT, "esp_keymin", NULL, 7925 NULL, 0, &ipsec_esp_keymin, 0, 7926 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 7927 sysctl_createv(clog, 0, NULL, NULL, 7928 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7929 CTLTYPE_INT, "prefered_oldsa", NULL, 7930 NULL, 0, &key_prefered_oldsa, 0, 7931 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 7932 sysctl_createv(clog, 0, NULL, NULL, 7933 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7934 CTLTYPE_INT, "esp_auth", NULL, 7935 NULL, 0, &ipsec_esp_auth, 0, 7936 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 7937 sysctl_createv(clog, 0, NULL, NULL, 7938 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7939 CTLTYPE_INT, "ah_keymin", NULL, 7940 NULL, 0, &ipsec_ah_keymin, 0, 7941 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 7942 } 7943 7944 /* 7945 * Register sysctl names used by setkey(8). For historical reasons, 7946 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 7947 * for both FAST_IPSEC and KAME IPSEC. 7948 */ 7949 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 7950 { 7951 7952 /* Make sure net.key exists before we register nodes underneath it. */ 7953 sysctl_createv(clog, 0, NULL, NULL, 7954 CTLFLAG_PERMANENT, 7955 CTLTYPE_NODE, "net", NULL, 7956 NULL, 0, NULL, 0, 7957 CTL_NET, CTL_EOL); 7958 sysctl_createv(clog, 0, NULL, NULL, 7959 CTLFLAG_PERMANENT, 7960 CTLTYPE_NODE, "key", NULL, 7961 NULL, 0, NULL, 0, 7962 CTL_NET, PF_KEY, CTL_EOL); 7963 7964 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 7965 sysctl_createv(clog, 0, NULL, NULL, 7966 CTLFLAG_PERMANENT, 7967 CTLTYPE_STRUCT, "dumpsa", NULL, 7968 sysctl_net_key_dumpsa, 0, NULL, 0, 7969 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 7970 sysctl_createv(clog, 0, NULL, NULL, 7971 CTLFLAG_PERMANENT, 7972 CTLTYPE_STRUCT, "dumpsp", NULL, 7973 sysctl_net_key_dumpsp, 0, NULL, 0, 7974 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 7975 } 7976
Indexes created Mon Sep 22 21:09:42 GMT 2025