key.c revision 1.34
1 /* $NetBSD: key.c,v 1.34 2007/02/11 13:32:18 degroote Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.34 2007/02/11 13:32:18 degroote Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 67 #include <net/if.h> 68 #include <net/route.h> 69 #include <net/raw_cb.h> 70 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/in_var.h> 75 #ifdef INET 76 #include <netinet/ip_var.h> 77 #endif 78 79 #ifdef INET6 80 #include <netinet/ip6.h> 81 #include <netinet6/in6_var.h> 82 #include <netinet6/ip6_var.h> 83 #endif /* INET6 */ 84 85 #ifdef INET 86 #include <netinet/in_pcb.h> 87 #endif 88 #ifdef INET6 89 #include <netinet6/in6_pcb.h> 90 #endif /* INET6 */ 91 92 #include <net/pfkeyv2.h> 93 #include <netipsec/keydb.h> 94 #include <netipsec/key.h> 95 #include <netipsec/keysock.h> 96 #include <netipsec/key_debug.h> 97 98 #include <netipsec/ipsec.h> 99 #ifdef INET6 100 #include <netipsec/ipsec6.h> 101 #endif 102 103 #include <netipsec/xform.h> 104 #include <netipsec/ipsec_osdep.h> 105 #include <netipsec/ipcomp.h> 106 107 108 #include <machine/stdarg.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 /* 117 * Note on SA reference counting: 118 * - SAs that are not in DEAD state will have (total external reference + 1) 119 * following value in reference count field. they cannot be freed and are 120 * referenced from SA header. 121 * - SAs that are in DEAD state will have (total external reference) 122 * in reference count field. they are ready to be freed. reference from 123 * SA header will be removed in key_delsav(), when the reference count 124 * field hits 0 (= no external reference other than from SA header. 125 */ 126 127 u_int32_t key_debug_level = 0; 128 static u_int key_spi_trycnt = 1000; 129 static u_int32_t key_spi_minval = 0x100; 130 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 131 static u_int32_t policy_id = 0; 132 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 133 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 134 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 135 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 136 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 137 138 static u_int32_t acq_seq = 0; 139 static int key_tick_init_random = 0; 140 141 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 142 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 143 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 144 /* registed list */ 145 #ifndef IPSEC_NONBLOCK_ACQUIRE 146 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 147 #endif 148 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 149 150 /* search order for SAs */ 151 static u_int saorder_state_valid[] = { 152 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 153 /* 154 * This order is important because we must select the oldest SA 155 * for outbound processing. For inbound, This is not important. 156 */ 157 }; 158 static u_int saorder_state_alive[] = { 159 /* except DEAD */ 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 161 }; 162 static u_int saorder_state_any[] = { 163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 164 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 165 }; 166 167 static const int minsize[] = { 168 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 169 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 170 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 171 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 172 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 173 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 174 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 175 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 176 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 177 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 178 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 179 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 180 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 181 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 182 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 183 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 184 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 185 0, /* SADB_X_EXT_KMPRIVATE */ 186 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 187 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 188 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 189 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 190 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 191 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OA */ 192 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 193 }; 194 static const int maxsize[] = { 195 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 196 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 200 0, /* SADB_EXT_ADDRESS_SRC */ 201 0, /* SADB_EXT_ADDRESS_DST */ 202 0, /* SADB_EXT_ADDRESS_PROXY */ 203 0, /* SADB_EXT_KEY_AUTH */ 204 0, /* SADB_EXT_KEY_ENCRYPT */ 205 0, /* SADB_EXT_IDENTITY_SRC */ 206 0, /* SADB_EXT_IDENTITY_DST */ 207 0, /* SADB_EXT_SENSITIVITY */ 208 0, /* SADB_EXT_PROPOSAL */ 209 0, /* SADB_EXT_SUPPORTED_AUTH */ 210 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 211 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 212 0, /* SADB_X_EXT_KMPRIVATE */ 213 0, /* SADB_X_EXT_POLICY */ 214 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 215 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 217 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 218 0, /* SADB_X_EXT_NAT_T_OA */ 219 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 220 }; 221 222 static int ipsec_esp_keymin = 256; 223 static int ipsec_esp_auth = 0; 224 static int ipsec_ah_keymin = 128; 225 226 #ifdef SYSCTL_DECL 227 SYSCTL_DECL(_net_key); 228 #endif 229 230 #ifdef SYSCTL_INT 231 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 232 &key_debug_level, 0, ""); 233 234 /* max count of trial for the decision of spi value */ 235 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 236 &key_spi_trycnt, 0, ""); 237 238 /* minimum spi value to allocate automatically. */ 239 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 240 &key_spi_minval, 0, ""); 241 242 /* maximun spi value to allocate automatically. */ 243 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 244 &key_spi_maxval, 0, ""); 245 246 /* interval to initialize randseed */ 247 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 248 &key_int_random, 0, ""); 249 250 /* lifetime for larval SA */ 251 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 252 &key_larval_lifetime, 0, ""); 253 254 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 255 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 256 &key_blockacq_count, 0, ""); 257 258 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 259 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 260 &key_blockacq_lifetime, 0, ""); 261 262 /* ESP auth */ 263 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 264 &ipsec_esp_auth, 0, ""); 265 266 /* minimum ESP key length */ 267 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 268 &ipsec_esp_keymin, 0, ""); 269 270 /* minimum AH key length */ 271 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 272 &ipsec_ah_keymin, 0, ""); 273 274 /* perfered old SA rather than new SA */ 275 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 276 &key_prefered_oldsa, 0, ""); 277 #endif /* SYSCTL_INT */ 278 279 #ifndef LIST_FOREACH 280 #define LIST_FOREACH(elm, head, field) \ 281 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 282 #endif 283 #define __LIST_CHAINED(elm) \ 284 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 285 #define LIST_INSERT_TAIL(head, elm, type, field) \ 286 do {\ 287 struct type *curelm = LIST_FIRST(head); \ 288 if (curelm == NULL) {\ 289 LIST_INSERT_HEAD(head, elm, field); \ 290 } else { \ 291 while (LIST_NEXT(curelm, field)) \ 292 curelm = LIST_NEXT(curelm, field);\ 293 LIST_INSERT_AFTER(curelm, elm, field);\ 294 }\ 295 } while (0) 296 297 #define KEY_CHKSASTATE(head, sav, name) \ 298 do { \ 299 if ((head) != (sav)) { \ 300 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 301 (name), (head), (sav))); \ 302 continue; \ 303 } \ 304 } while (0) 305 306 #define KEY_CHKSPDIR(head, sp, name) \ 307 do { \ 308 if ((head) != (sp)) { \ 309 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 310 "anyway continue.\n", \ 311 (name), (head), (sp))); \ 312 } \ 313 } while (0) 314 315 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 316 317 #if 1 318 #define KMALLOC(p, t, n) \ 319 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 320 #define KFREE(p) \ 321 free((caddr_t)(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((caddr_t)(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, caddr_t, 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 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 *)((caddr_t)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 *)((caddr_t)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 caddr_t 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 = (caddr_t)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, caddr_t)); 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, caddr_t)); 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, caddr_t) + 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, caddr_t) + 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, caddr_t), 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, caddr_t) + 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((caddr_t)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 = (caddr_t)(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, caddr_t), 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, caddr_t) + 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 caddr_t 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, caddr_t) + 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 caddr_t new; 3839 3840 KMALLOC(new, caddr_t, 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 default: 4183 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4184 return 1; 4185 break; 4186 } 4187 4188 return 0; 4189 #undef satosin 4190 #undef satosin6 4191 } 4192 4193 /* 4194 * compare two buffers with mask. 4195 * IN: 4196 * addr1: source 4197 * addr2: object 4198 * bits: Number of bits to compare 4199 * OUT: 4200 * 1 : equal 4201 * 0 : not equal 4202 */ 4203 static int 4204 key_bbcmp(const void *a1, const void *a2, u_int bits) 4205 { 4206 const unsigned char *p1 = a1; 4207 const unsigned char *p2 = a2; 4208 4209 /* XXX: This could be considerably faster if we compare a word 4210 * at a time, but it is complicated on LSB Endian machines */ 4211 4212 /* Handle null pointers */ 4213 if (p1 == NULL || p2 == NULL) 4214 return (p1 == p2); 4215 4216 while (bits >= 8) { 4217 if (*p1++ != *p2++) 4218 return 0; 4219 bits -= 8; 4220 } 4221 4222 if (bits > 0) { 4223 u_int8_t mask = ~((1<<(8-bits))-1); 4224 if ((*p1 & mask) != (*p2 & mask)) 4225 return 0; 4226 } 4227 return 1; /* Match! */ 4228 } 4229 4230 /* 4231 * time handler. 4232 * scanning SPD and SAD to check status for each entries, 4233 * and do to remove or to expire. 4234 * XXX: year 2038 problem may remain. 4235 */ 4236 void 4237 key_timehandler(void* arg) 4238 { 4239 u_int dir; 4240 int s; 4241 time_t now = time_second; 4242 4243 s = splsoftnet(); /*called from softclock()*/ 4244 4245 /* SPD */ 4246 { 4247 struct secpolicy *sp, *nextsp; 4248 4249 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4250 for (sp = LIST_FIRST(&sptree[dir]); 4251 sp != NULL; 4252 sp = nextsp) { 4253 4254 nextsp = LIST_NEXT(sp, chain); 4255 4256 if (sp->state == IPSEC_SPSTATE_DEAD) { 4257 key_sp_unlink(sp); /*XXX*/ 4258 4259 /* 'sp' dead; continue transfers to 4260 * 'sp = nextsp' 4261 */ 4262 continue; 4263 } 4264 4265 if (sp->lifetime == 0 && sp->validtime == 0) 4266 continue; 4267 4268 /* the deletion will occur next time */ 4269 if ((sp->lifetime && now - sp->created > sp->lifetime) 4270 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4271 key_sp_dead(sp); 4272 key_spdexpire(sp); 4273 continue; 4274 } 4275 } 4276 } 4277 } 4278 4279 /* SAD */ 4280 { 4281 struct secashead *sah, *nextsah; 4282 struct secasvar *sav, *nextsav; 4283 4284 for (sah = LIST_FIRST(&sahtree); 4285 sah != NULL; 4286 sah = nextsah) { 4287 4288 nextsah = LIST_NEXT(sah, chain); 4289 4290 /* if sah has been dead, then delete it and process next sah. */ 4291 if (sah->state == SADB_SASTATE_DEAD) { 4292 key_delsah(sah); 4293 continue; 4294 } 4295 4296 /* if LARVAL entry doesn't become MATURE, delete it. */ 4297 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4298 sav != NULL; 4299 sav = nextsav) { 4300 4301 nextsav = LIST_NEXT(sav, chain); 4302 4303 if (now - sav->created > key_larval_lifetime) { 4304 KEY_FREESAV(&sav); 4305 } 4306 } 4307 4308 /* 4309 * check MATURE entry to start to send expire message 4310 * whether or not. 4311 */ 4312 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4313 sav != NULL; 4314 sav = nextsav) { 4315 4316 nextsav = LIST_NEXT(sav, chain); 4317 4318 /* we don't need to check. */ 4319 if (sav->lft_s == NULL) 4320 continue; 4321 4322 /* sanity check */ 4323 if (sav->lft_c == NULL) { 4324 ipseclog((LOG_DEBUG,"key_timehandler: " 4325 "There is no CURRENT time, why?\n")); 4326 continue; 4327 } 4328 4329 /* check SOFT lifetime */ 4330 if (sav->lft_s->sadb_lifetime_addtime != 0 4331 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4332 /* 4333 * check SA to be used whether or not. 4334 * when SA hasn't been used, delete it. 4335 */ 4336 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4337 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4338 KEY_FREESAV(&sav); 4339 } else { 4340 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4341 /* 4342 * XXX If we keep to send expire 4343 * message in the status of 4344 * DYING. Do remove below code. 4345 */ 4346 key_expire(sav); 4347 } 4348 } 4349 /* check SOFT lifetime by bytes */ 4350 /* 4351 * XXX I don't know the way to delete this SA 4352 * when new SA is installed. Caution when it's 4353 * installed too big lifetime by time. 4354 */ 4355 else if (sav->lft_s->sadb_lifetime_bytes != 0 4356 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4357 4358 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4359 /* 4360 * XXX If we keep to send expire 4361 * message in the status of 4362 * DYING. Do remove below code. 4363 */ 4364 key_expire(sav); 4365 } 4366 } 4367 4368 /* check DYING entry to change status to DEAD. */ 4369 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4370 sav != NULL; 4371 sav = nextsav) { 4372 4373 nextsav = LIST_NEXT(sav, chain); 4374 4375 /* we don't need to check. */ 4376 if (sav->lft_h == NULL) 4377 continue; 4378 4379 /* sanity check */ 4380 if (sav->lft_c == NULL) { 4381 ipseclog((LOG_DEBUG, "key_timehandler: " 4382 "There is no CURRENT time, why?\n")); 4383 continue; 4384 } 4385 4386 if (sav->lft_h->sadb_lifetime_addtime != 0 4387 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4388 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4389 KEY_FREESAV(&sav); 4390 } 4391 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4392 else if (sav->lft_s != NULL 4393 && sav->lft_s->sadb_lifetime_addtime != 0 4394 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4395 /* 4396 * XXX: should be checked to be 4397 * installed the valid SA. 4398 */ 4399 4400 /* 4401 * If there is no SA then sending 4402 * expire message. 4403 */ 4404 key_expire(sav); 4405 } 4406 #endif 4407 /* check HARD lifetime by bytes */ 4408 else if (sav->lft_h->sadb_lifetime_bytes != 0 4409 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4410 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4411 KEY_FREESAV(&sav); 4412 } 4413 } 4414 4415 /* delete entry in DEAD */ 4416 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4417 sav != NULL; 4418 sav = nextsav) { 4419 4420 nextsav = LIST_NEXT(sav, chain); 4421 4422 /* sanity check */ 4423 if (sav->state != SADB_SASTATE_DEAD) { 4424 ipseclog((LOG_DEBUG, "key_timehandler: " 4425 "invalid sav->state " 4426 "(queue: %d SA: %d): " 4427 "kill it anyway\n", 4428 SADB_SASTATE_DEAD, sav->state)); 4429 } 4430 4431 /* 4432 * do not call key_freesav() here. 4433 * sav should already be freed, and sav->refcnt 4434 * shows other references to sav 4435 * (such as from SPD). 4436 */ 4437 } 4438 } 4439 } 4440 4441 #ifndef IPSEC_NONBLOCK_ACQUIRE 4442 /* ACQ tree */ 4443 { 4444 struct secacq *acq, *nextacq; 4445 4446 for (acq = LIST_FIRST(&acqtree); 4447 acq != NULL; 4448 acq = nextacq) { 4449 4450 nextacq = LIST_NEXT(acq, chain); 4451 4452 if (now - acq->created > key_blockacq_lifetime 4453 && __LIST_CHAINED(acq)) { 4454 LIST_REMOVE(acq, chain); 4455 KFREE(acq); 4456 } 4457 } 4458 } 4459 #endif 4460 4461 /* SP ACQ tree */ 4462 { 4463 struct secspacq *acq, *nextacq; 4464 4465 for (acq = LIST_FIRST(&spacqtree); 4466 acq != NULL; 4467 acq = nextacq) { 4468 4469 nextacq = LIST_NEXT(acq, chain); 4470 4471 if (now - acq->created > key_blockacq_lifetime 4472 && __LIST_CHAINED(acq)) { 4473 LIST_REMOVE(acq, chain); 4474 KFREE(acq); 4475 } 4476 } 4477 } 4478 4479 /* initialize random seed */ 4480 if (key_tick_init_random++ > key_int_random) { 4481 key_tick_init_random = 0; 4482 key_srandom(); 4483 } 4484 4485 #ifndef IPSEC_DEBUG2 4486 /* do exchange to tick time !! */ 4487 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 4488 #endif /* IPSEC_DEBUG2 */ 4489 4490 splx(s); 4491 return; 4492 } 4493 4494 #ifdef __NetBSD__ 4495 void srandom(int); 4496 void srandom(int arg) {return;} 4497 #endif 4498 4499 /* 4500 * to initialize a seed for random() 4501 */ 4502 static void 4503 key_srandom() 4504 { 4505 srandom(time_second); 4506 } 4507 4508 u_long 4509 key_random() 4510 { 4511 u_long value; 4512 4513 key_randomfill(&value, sizeof(value)); 4514 return value; 4515 } 4516 4517 void 4518 key_randomfill(p, l) 4519 void *p; 4520 size_t l; 4521 { 4522 size_t n; 4523 u_long v; 4524 static int warn = 1; 4525 4526 n = 0; 4527 n = (size_t)read_random(p, (u_int)l); 4528 /* last resort */ 4529 while (n < l) { 4530 v = random(); 4531 bcopy(&v, (u_int8_t *)p + n, 4532 l - n < sizeof(v) ? l - n : sizeof(v)); 4533 n += sizeof(v); 4534 4535 if (warn) { 4536 printf("WARNING: pseudo-random number generator " 4537 "used for IPsec processing\n"); 4538 warn = 0; 4539 } 4540 } 4541 } 4542 4543 /* 4544 * map SADB_SATYPE_* to IPPROTO_*. 4545 * if satype == SADB_SATYPE then satype is mapped to ~0. 4546 * OUT: 4547 * 0: invalid satype. 4548 */ 4549 static u_int16_t 4550 key_satype2proto(satype) 4551 u_int8_t satype; 4552 { 4553 switch (satype) { 4554 case SADB_SATYPE_UNSPEC: 4555 return IPSEC_PROTO_ANY; 4556 case SADB_SATYPE_AH: 4557 return IPPROTO_AH; 4558 case SADB_SATYPE_ESP: 4559 return IPPROTO_ESP; 4560 case SADB_X_SATYPE_IPCOMP: 4561 return IPPROTO_IPCOMP; 4562 case SADB_X_SATYPE_TCPSIGNATURE: 4563 return IPPROTO_TCP; 4564 default: 4565 return 0; 4566 } 4567 /* NOTREACHED */ 4568 } 4569 4570 /* 4571 * map IPPROTO_* to SADB_SATYPE_* 4572 * OUT: 4573 * 0: invalid protocol type. 4574 */ 4575 static u_int8_t 4576 key_proto2satype(proto) 4577 u_int16_t proto; 4578 { 4579 switch (proto) { 4580 case IPPROTO_AH: 4581 return SADB_SATYPE_AH; 4582 case IPPROTO_ESP: 4583 return SADB_SATYPE_ESP; 4584 case IPPROTO_IPCOMP: 4585 return SADB_X_SATYPE_IPCOMP; 4586 case IPPROTO_TCP: 4587 return SADB_X_SATYPE_TCPSIGNATURE; 4588 default: 4589 return 0; 4590 } 4591 /* NOTREACHED */ 4592 } 4593 4594 /* %%% PF_KEY */ 4595 /* 4596 * SADB_GETSPI processing is to receive 4597 * <base, (SA2), src address, dst address, (SPI range)> 4598 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4599 * tree with the status of LARVAL, and send 4600 * <base, SA(*), address(SD)> 4601 * to the IKMPd. 4602 * 4603 * IN: mhp: pointer to the pointer to each header. 4604 * OUT: NULL if fail. 4605 * other if success, return pointer to the message to send. 4606 */ 4607 static int 4608 key_getspi(so, m, mhp) 4609 struct socket *so; 4610 struct mbuf *m; 4611 const struct sadb_msghdr *mhp; 4612 { 4613 struct sadb_address *src0, *dst0; 4614 struct secasindex saidx; 4615 struct secashead *newsah; 4616 struct secasvar *newsav; 4617 u_int8_t proto; 4618 u_int32_t spi; 4619 u_int8_t mode; 4620 u_int16_t reqid; 4621 int error; 4622 4623 /* sanity check */ 4624 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4625 panic("key_getspi: NULL pointer is passed"); 4626 4627 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4628 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4629 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4630 return key_senderror(so, m, EINVAL); 4631 } 4632 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4633 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4634 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4635 return key_senderror(so, m, EINVAL); 4636 } 4637 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4638 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4639 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4640 } else { 4641 mode = IPSEC_MODE_ANY; 4642 reqid = 0; 4643 } 4644 4645 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4646 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4647 4648 /* map satype to proto */ 4649 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4650 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4651 return key_senderror(so, m, EINVAL); 4652 } 4653 4654 /* make sure if port number is zero. */ 4655 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4656 case AF_INET: 4657 if (((struct sockaddr *)(src0 + 1))->sa_len != 4658 sizeof(struct sockaddr_in)) 4659 return key_senderror(so, m, EINVAL); 4660 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4661 break; 4662 case AF_INET6: 4663 if (((struct sockaddr *)(src0 + 1))->sa_len != 4664 sizeof(struct sockaddr_in6)) 4665 return key_senderror(so, m, EINVAL); 4666 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4667 break; 4668 default: 4669 ; /*???*/ 4670 } 4671 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4672 case AF_INET: 4673 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4674 sizeof(struct sockaddr_in)) 4675 return key_senderror(so, m, EINVAL); 4676 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4677 break; 4678 case AF_INET6: 4679 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4680 sizeof(struct sockaddr_in6)) 4681 return key_senderror(so, m, EINVAL); 4682 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4683 break; 4684 default: 4685 ; /*???*/ 4686 } 4687 4688 /* XXX boundary check against sa_len */ 4689 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4690 4691 /* SPI allocation */ 4692 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4693 &saidx); 4694 if (spi == 0) 4695 return key_senderror(so, m, EINVAL); 4696 4697 /* get a SA index */ 4698 if ((newsah = key_getsah(&saidx)) == NULL) { 4699 /* create a new SA index */ 4700 if ((newsah = key_newsah(&saidx)) == NULL) { 4701 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4702 return key_senderror(so, m, ENOBUFS); 4703 } 4704 } 4705 4706 /* get a new SA */ 4707 /* XXX rewrite */ 4708 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4709 if (newsav == NULL) { 4710 /* XXX don't free new SA index allocated in above. */ 4711 return key_senderror(so, m, error); 4712 } 4713 4714 /* set spi */ 4715 newsav->spi = htonl(spi); 4716 4717 #ifndef IPSEC_NONBLOCK_ACQUIRE 4718 /* delete the entry in acqtree */ 4719 if (mhp->msg->sadb_msg_seq != 0) { 4720 struct secacq *acq; 4721 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4722 /* reset counter in order to deletion by timehandler. */ 4723 acq->created = time_second; 4724 acq->count = 0; 4725 } 4726 } 4727 #endif 4728 4729 { 4730 struct mbuf *n, *nn; 4731 struct sadb_sa *m_sa; 4732 struct sadb_msg *newmsg; 4733 int off, len; 4734 4735 /* create new sadb_msg to reply. */ 4736 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4737 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4738 if (len > MCLBYTES) 4739 return key_senderror(so, m, ENOBUFS); 4740 4741 MGETHDR(n, M_DONTWAIT, MT_DATA); 4742 if (len > MHLEN) { 4743 MCLGET(n, M_DONTWAIT); 4744 if ((n->m_flags & M_EXT) == 0) { 4745 m_freem(n); 4746 n = NULL; 4747 } 4748 } 4749 if (!n) 4750 return key_senderror(so, m, ENOBUFS); 4751 4752 n->m_len = len; 4753 n->m_next = NULL; 4754 off = 0; 4755 4756 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4757 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4758 4759 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4760 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4761 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4762 m_sa->sadb_sa_spi = htonl(spi); 4763 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4764 4765 #ifdef DIAGNOSTIC 4766 if (off != len) 4767 panic("length inconsistency in key_getspi"); 4768 #endif 4769 4770 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4771 SADB_EXT_ADDRESS_DST); 4772 if (!n->m_next) { 4773 m_freem(n); 4774 return key_senderror(so, m, ENOBUFS); 4775 } 4776 4777 if (n->m_len < sizeof(struct sadb_msg)) { 4778 n = m_pullup(n, sizeof(struct sadb_msg)); 4779 if (n == NULL) 4780 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4781 } 4782 4783 n->m_pkthdr.len = 0; 4784 for (nn = n; nn; nn = nn->m_next) 4785 n->m_pkthdr.len += nn->m_len; 4786 4787 newmsg = mtod(n, struct sadb_msg *); 4788 newmsg->sadb_msg_seq = newsav->seq; 4789 newmsg->sadb_msg_errno = 0; 4790 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4791 4792 m_freem(m); 4793 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4794 } 4795 } 4796 4797 /* 4798 * allocating new SPI 4799 * called by key_getspi(). 4800 * OUT: 4801 * 0: failure. 4802 * others: success. 4803 */ 4804 static u_int32_t 4805 key_do_getnewspi(spirange, saidx) 4806 struct sadb_spirange *spirange; 4807 struct secasindex *saidx; 4808 { 4809 u_int32_t newspi; 4810 u_int32_t spmin, spmax; 4811 int count = key_spi_trycnt; 4812 4813 /* set spi range to allocate */ 4814 if (spirange != NULL) { 4815 spmin = spirange->sadb_spirange_min; 4816 spmax = spirange->sadb_spirange_max; 4817 } else { 4818 spmin = key_spi_minval; 4819 spmax = key_spi_maxval; 4820 } 4821 /* IPCOMP needs 2-byte SPI */ 4822 if (saidx->proto == IPPROTO_IPCOMP) { 4823 u_int32_t t; 4824 if (spmin >= 0x10000) 4825 spmin = 0xffff; 4826 if (spmax >= 0x10000) 4827 spmax = 0xffff; 4828 if (spmin > spmax) { 4829 t = spmin; spmin = spmax; spmax = t; 4830 } 4831 } 4832 4833 if (spmin == spmax) { 4834 if (key_checkspidup(saidx, spmin) != NULL) { 4835 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 4836 return 0; 4837 } 4838 4839 count--; /* taking one cost. */ 4840 newspi = spmin; 4841 4842 } else { 4843 4844 /* init SPI */ 4845 newspi = 0; 4846 4847 /* when requesting to allocate spi ranged */ 4848 while (count--) { 4849 /* generate pseudo-random SPI value ranged. */ 4850 newspi = spmin + (key_random() % (spmax - spmin + 1)); 4851 4852 if (key_checkspidup(saidx, newspi) == NULL) 4853 break; 4854 } 4855 4856 if (count == 0 || newspi == 0) { 4857 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 4858 return 0; 4859 } 4860 } 4861 4862 /* statistics */ 4863 keystat.getspi_count = 4864 (keystat.getspi_count + key_spi_trycnt - count) / 2; 4865 4866 return newspi; 4867 } 4868 4869 /* 4870 * SADB_UPDATE processing 4871 * receive 4872 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4873 * key(AE), (identity(SD),) (sensitivity)> 4874 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4875 * and send 4876 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4877 * (identity(SD),) (sensitivity)> 4878 * to the ikmpd. 4879 * 4880 * m will always be freed. 4881 */ 4882 static int 4883 key_update(so, m, mhp) 4884 struct socket *so; 4885 struct mbuf *m; 4886 const struct sadb_msghdr *mhp; 4887 { 4888 struct sadb_sa *sa0; 4889 struct sadb_address *src0, *dst0; 4890 struct secasindex saidx; 4891 struct secashead *sah; 4892 struct secasvar *sav; 4893 u_int16_t proto; 4894 u_int8_t mode; 4895 u_int16_t reqid; 4896 int error; 4897 4898 /* sanity check */ 4899 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4900 panic("key_update: NULL pointer is passed"); 4901 4902 /* map satype to proto */ 4903 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4904 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 4905 return key_senderror(so, m, EINVAL); 4906 } 4907 4908 if (mhp->ext[SADB_EXT_SA] == NULL || 4909 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4910 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4911 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4912 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4913 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4914 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4915 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4916 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4917 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4918 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4919 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4920 return key_senderror(so, m, EINVAL); 4921 } 4922 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4923 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4924 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4925 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 4926 return key_senderror(so, m, EINVAL); 4927 } 4928 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4929 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4930 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4931 } else { 4932 mode = IPSEC_MODE_ANY; 4933 reqid = 0; 4934 } 4935 /* XXX boundary checking for other extensions */ 4936 4937 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4938 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4939 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4940 4941 /* XXX boundary check against sa_len */ 4942 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4943 4944 /* get a SA header */ 4945 if ((sah = key_getsah(&saidx)) == NULL) { 4946 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 4947 return key_senderror(so, m, ENOENT); 4948 } 4949 4950 /* set spidx if there */ 4951 /* XXX rewrite */ 4952 error = key_setident(sah, m, mhp); 4953 if (error) 4954 return key_senderror(so, m, error); 4955 4956 /* find a SA with sequence number. */ 4957 #ifdef IPSEC_DOSEQCHECK 4958 if (mhp->msg->sadb_msg_seq != 0 4959 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4960 ipseclog((LOG_DEBUG, 4961 "key_update: no larval SA with sequence %u exists.\n", 4962 mhp->msg->sadb_msg_seq)); 4963 return key_senderror(so, m, ENOENT); 4964 } 4965 #else 4966 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 4967 ipseclog((LOG_DEBUG, 4968 "key_update: no such a SA found (spi:%u)\n", 4969 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4970 return key_senderror(so, m, EINVAL); 4971 } 4972 #endif 4973 4974 /* validity check */ 4975 if (sav->sah->saidx.proto != proto) { 4976 ipseclog((LOG_DEBUG, 4977 "key_update: protocol mismatched (DB=%u param=%u)\n", 4978 sav->sah->saidx.proto, proto)); 4979 return key_senderror(so, m, EINVAL); 4980 } 4981 #ifdef IPSEC_DOSEQCHECK 4982 if (sav->spi != sa0->sadb_sa_spi) { 4983 ipseclog((LOG_DEBUG, 4984 "key_update: SPI mismatched (DB:%u param:%u)\n", 4985 (u_int32_t)ntohl(sav->spi), 4986 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4987 return key_senderror(so, m, EINVAL); 4988 } 4989 #endif 4990 if (sav->pid != mhp->msg->sadb_msg_pid) { 4991 ipseclog((LOG_DEBUG, 4992 "key_update: pid mismatched (DB:%u param:%u)\n", 4993 sav->pid, mhp->msg->sadb_msg_pid)); 4994 return key_senderror(so, m, EINVAL); 4995 } 4996 4997 /* copy sav values */ 4998 error = key_setsaval(sav, m, mhp); 4999 if (error) { 5000 KEY_FREESAV(&sav); 5001 return key_senderror(so, m, error); 5002 } 5003 5004 /* check SA values to be mature. */ 5005 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5006 KEY_FREESAV(&sav); 5007 return key_senderror(so, m, 0); 5008 } 5009 5010 { 5011 struct mbuf *n; 5012 5013 /* set msg buf from mhp */ 5014 n = key_getmsgbuf_x1(m, mhp); 5015 if (n == NULL) { 5016 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5017 return key_senderror(so, m, ENOBUFS); 5018 } 5019 5020 m_freem(m); 5021 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5022 } 5023 } 5024 5025 /* 5026 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5027 * only called by key_update(). 5028 * OUT: 5029 * NULL : not found 5030 * others : found, pointer to a SA. 5031 */ 5032 #ifdef IPSEC_DOSEQCHECK 5033 static struct secasvar * 5034 key_getsavbyseq(sah, seq) 5035 struct secashead *sah; 5036 u_int32_t seq; 5037 { 5038 struct secasvar *sav; 5039 u_int state; 5040 5041 state = SADB_SASTATE_LARVAL; 5042 5043 /* search SAD with sequence number ? */ 5044 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5045 5046 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5047 5048 if (sav->seq == seq) { 5049 SA_ADDREF(sav); 5050 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5051 printf("DP key_getsavbyseq cause " 5052 "refcnt++:%d SA:%p\n", 5053 sav->refcnt, sav)); 5054 return sav; 5055 } 5056 } 5057 5058 return NULL; 5059 } 5060 #endif 5061 5062 /* 5063 * SADB_ADD processing 5064 * add an entry to SA database, when received 5065 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5066 * key(AE), (identity(SD),) (sensitivity)> 5067 * from the ikmpd, 5068 * and send 5069 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5070 * (identity(SD),) (sensitivity)> 5071 * to the ikmpd. 5072 * 5073 * IGNORE identity and sensitivity messages. 5074 * 5075 * m will always be freed. 5076 */ 5077 static int 5078 key_add(so, m, mhp) 5079 struct socket *so; 5080 struct mbuf *m; 5081 const struct sadb_msghdr *mhp; 5082 { 5083 struct sadb_sa *sa0; 5084 struct sadb_address *src0, *dst0; 5085 struct secasindex saidx; 5086 struct secashead *newsah; 5087 struct secasvar *newsav; 5088 u_int16_t proto; 5089 u_int8_t mode; 5090 u_int16_t reqid; 5091 int error; 5092 5093 /* sanity check */ 5094 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5095 panic("key_add: NULL pointer is passed"); 5096 5097 /* map satype to proto */ 5098 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5099 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5100 return key_senderror(so, m, EINVAL); 5101 } 5102 5103 if (mhp->ext[SADB_EXT_SA] == NULL || 5104 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5105 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5106 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5107 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5108 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5109 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5110 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5111 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5112 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5113 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5114 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5115 return key_senderror(so, m, EINVAL); 5116 } 5117 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5118 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5119 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5120 /* XXX need more */ 5121 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5122 return key_senderror(so, m, EINVAL); 5123 } 5124 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5125 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5126 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5127 } else { 5128 mode = IPSEC_MODE_ANY; 5129 reqid = 0; 5130 } 5131 5132 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5133 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5134 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5135 5136 /* XXX boundary check against sa_len */ 5137 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5138 5139 /* get a SA header */ 5140 if ((newsah = key_getsah(&saidx)) == NULL) { 5141 /* create a new SA header */ 5142 if ((newsah = key_newsah(&saidx)) == NULL) { 5143 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5144 return key_senderror(so, m, ENOBUFS); 5145 } 5146 } 5147 5148 /* set spidx if there */ 5149 /* XXX rewrite */ 5150 error = key_setident(newsah, m, mhp); 5151 if (error) { 5152 return key_senderror(so, m, error); 5153 } 5154 5155 /* create new SA entry. */ 5156 /* We can create new SA only if SPI is differenct. */ 5157 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5158 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5159 return key_senderror(so, m, EEXIST); 5160 } 5161 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5162 if (newsav == NULL) { 5163 return key_senderror(so, m, error); 5164 } 5165 5166 /* check SA values to be mature. */ 5167 if ((error = key_mature(newsav)) != 0) { 5168 KEY_FREESAV(&newsav); 5169 return key_senderror(so, m, error); 5170 } 5171 5172 /* 5173 * don't call key_freesav() here, as we would like to keep the SA 5174 * in the database on success. 5175 */ 5176 5177 { 5178 struct mbuf *n; 5179 5180 /* set msg buf from mhp */ 5181 n = key_getmsgbuf_x1(m, mhp); 5182 if (n == NULL) { 5183 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5184 return key_senderror(so, m, ENOBUFS); 5185 } 5186 5187 m_freem(m); 5188 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5189 } 5190 } 5191 5192 /* m is retained */ 5193 static int 5194 key_setident(sah, m, mhp) 5195 struct secashead *sah; 5196 struct mbuf *m; 5197 const struct sadb_msghdr *mhp; 5198 { 5199 const struct sadb_ident *idsrc, *iddst; 5200 int idsrclen, iddstlen; 5201 5202 /* sanity check */ 5203 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5204 panic("key_setident: NULL pointer is passed"); 5205 5206 /* don't make buffer if not there */ 5207 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5208 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5209 sah->idents = NULL; 5210 sah->identd = NULL; 5211 return 0; 5212 } 5213 5214 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5215 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5216 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5217 return EINVAL; 5218 } 5219 5220 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5221 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5222 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5223 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5224 5225 /* validity check */ 5226 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5227 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5228 return EINVAL; 5229 } 5230 5231 switch (idsrc->sadb_ident_type) { 5232 case SADB_IDENTTYPE_PREFIX: 5233 case SADB_IDENTTYPE_FQDN: 5234 case SADB_IDENTTYPE_USERFQDN: 5235 default: 5236 /* XXX do nothing */ 5237 sah->idents = NULL; 5238 sah->identd = NULL; 5239 return 0; 5240 } 5241 5242 /* make structure */ 5243 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5244 if (sah->idents == NULL) { 5245 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5246 return ENOBUFS; 5247 } 5248 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5249 if (sah->identd == NULL) { 5250 KFREE(sah->idents); 5251 sah->idents = NULL; 5252 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5253 return ENOBUFS; 5254 } 5255 bcopy(idsrc, sah->idents, idsrclen); 5256 bcopy(iddst, sah->identd, iddstlen); 5257 5258 return 0; 5259 } 5260 5261 /* 5262 * m will not be freed on return. 5263 * it is caller's responsibility to free the result. 5264 */ 5265 static struct mbuf * 5266 key_getmsgbuf_x1(m, mhp) 5267 struct mbuf *m; 5268 const struct sadb_msghdr *mhp; 5269 { 5270 struct mbuf *n; 5271 5272 /* sanity check */ 5273 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5274 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5275 5276 /* create new sadb_msg to reply. */ 5277 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5278 SADB_EXT_SA, SADB_X_EXT_SA2, 5279 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5280 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5281 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5282 if (!n) 5283 return NULL; 5284 5285 if (n->m_len < sizeof(struct sadb_msg)) { 5286 n = m_pullup(n, sizeof(struct sadb_msg)); 5287 if (n == NULL) 5288 return NULL; 5289 } 5290 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5291 mtod(n, struct sadb_msg *)->sadb_msg_len = 5292 PFKEY_UNIT64(n->m_pkthdr.len); 5293 5294 return n; 5295 } 5296 5297 static int key_delete_all __P((struct socket *, struct mbuf *, 5298 const struct sadb_msghdr *, u_int16_t)); 5299 5300 /* 5301 * SADB_DELETE processing 5302 * receive 5303 * <base, SA(*), address(SD)> 5304 * from the ikmpd, and set SADB_SASTATE_DEAD, 5305 * and send, 5306 * <base, SA(*), address(SD)> 5307 * to the ikmpd. 5308 * 5309 * m will always be freed. 5310 */ 5311 static int 5312 key_delete(so, m, mhp) 5313 struct socket *so; 5314 struct mbuf *m; 5315 const struct sadb_msghdr *mhp; 5316 { 5317 struct sadb_sa *sa0; 5318 struct sadb_address *src0, *dst0; 5319 struct secasindex saidx; 5320 struct secashead *sah; 5321 struct secasvar *sav = NULL; 5322 u_int16_t proto; 5323 5324 /* sanity check */ 5325 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5326 panic("key_delete: NULL pointer is passed"); 5327 5328 /* map satype to proto */ 5329 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5330 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5331 return key_senderror(so, m, EINVAL); 5332 } 5333 5334 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5335 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5336 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5337 return key_senderror(so, m, EINVAL); 5338 } 5339 5340 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5341 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5342 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5343 return key_senderror(so, m, EINVAL); 5344 } 5345 5346 if (mhp->ext[SADB_EXT_SA] == NULL) { 5347 /* 5348 * Caller wants us to delete all non-LARVAL SAs 5349 * that match the src/dst. This is used during 5350 * IKE INITIAL-CONTACT. 5351 */ 5352 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5353 return key_delete_all(so, m, mhp, proto); 5354 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5355 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5356 return key_senderror(so, m, EINVAL); 5357 } 5358 5359 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5360 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5361 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5362 5363 /* XXX boundary check against sa_len */ 5364 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5365 5366 /* get a SA header */ 5367 LIST_FOREACH(sah, &sahtree, chain) { 5368 if (sah->state == SADB_SASTATE_DEAD) 5369 continue; 5370 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5371 continue; 5372 5373 /* get a SA with SPI. */ 5374 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5375 if (sav) 5376 break; 5377 } 5378 if (sah == NULL) { 5379 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5380 return key_senderror(so, m, ENOENT); 5381 } 5382 5383 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5384 KEY_FREESAV(&sav); 5385 5386 { 5387 struct mbuf *n; 5388 struct sadb_msg *newmsg; 5389 5390 /* create new sadb_msg to reply. */ 5391 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5392 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5393 if (!n) 5394 return key_senderror(so, m, ENOBUFS); 5395 5396 if (n->m_len < sizeof(struct sadb_msg)) { 5397 n = m_pullup(n, sizeof(struct sadb_msg)); 5398 if (n == NULL) 5399 return key_senderror(so, m, ENOBUFS); 5400 } 5401 newmsg = mtod(n, struct sadb_msg *); 5402 newmsg->sadb_msg_errno = 0; 5403 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5404 5405 m_freem(m); 5406 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5407 } 5408 } 5409 5410 /* 5411 * delete all SAs for src/dst. Called from key_delete(). 5412 */ 5413 static int 5414 key_delete_all(so, m, mhp, proto) 5415 struct socket *so; 5416 struct mbuf *m; 5417 const struct sadb_msghdr *mhp; 5418 u_int16_t proto; 5419 { 5420 struct sadb_address *src0, *dst0; 5421 struct secasindex saidx; 5422 struct secashead *sah; 5423 struct secasvar *sav, *nextsav; 5424 u_int stateidx, state; 5425 5426 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5427 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5428 5429 /* XXX boundary check against sa_len */ 5430 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5431 5432 LIST_FOREACH(sah, &sahtree, chain) { 5433 if (sah->state == SADB_SASTATE_DEAD) 5434 continue; 5435 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5436 continue; 5437 5438 /* Delete all non-LARVAL SAs. */ 5439 for (stateidx = 0; 5440 stateidx < _ARRAYLEN(saorder_state_alive); 5441 stateidx++) { 5442 state = saorder_state_alive[stateidx]; 5443 if (state == SADB_SASTATE_LARVAL) 5444 continue; 5445 for (sav = LIST_FIRST(&sah->savtree[state]); 5446 sav != NULL; sav = nextsav) { 5447 nextsav = LIST_NEXT(sav, chain); 5448 /* sanity check */ 5449 if (sav->state != state) { 5450 ipseclog((LOG_DEBUG, "key_delete_all: " 5451 "invalid sav->state " 5452 "(queue: %d SA: %d)\n", 5453 state, sav->state)); 5454 continue; 5455 } 5456 5457 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5458 KEY_FREESAV(&sav); 5459 } 5460 } 5461 } 5462 { 5463 struct mbuf *n; 5464 struct sadb_msg *newmsg; 5465 5466 /* create new sadb_msg to reply. */ 5467 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5468 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5469 if (!n) 5470 return key_senderror(so, m, ENOBUFS); 5471 5472 if (n->m_len < sizeof(struct sadb_msg)) { 5473 n = m_pullup(n, sizeof(struct sadb_msg)); 5474 if (n == NULL) 5475 return key_senderror(so, m, ENOBUFS); 5476 } 5477 newmsg = mtod(n, struct sadb_msg *); 5478 newmsg->sadb_msg_errno = 0; 5479 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5480 5481 m_freem(m); 5482 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5483 } 5484 } 5485 5486 /* 5487 * SADB_GET processing 5488 * receive 5489 * <base, SA(*), address(SD)> 5490 * from the ikmpd, and get a SP and a SA to respond, 5491 * and send, 5492 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5493 * (identity(SD),) (sensitivity)> 5494 * to the ikmpd. 5495 * 5496 * m will always be freed. 5497 */ 5498 static int 5499 key_get(so, m, mhp) 5500 struct socket *so; 5501 struct mbuf *m; 5502 const struct sadb_msghdr *mhp; 5503 { 5504 struct sadb_sa *sa0; 5505 struct sadb_address *src0, *dst0; 5506 struct secasindex saidx; 5507 struct secashead *sah; 5508 struct secasvar *sav = NULL; 5509 u_int16_t proto; 5510 5511 /* sanity check */ 5512 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5513 panic("key_get: NULL pointer is passed"); 5514 5515 /* map satype to proto */ 5516 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5517 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5518 return key_senderror(so, m, EINVAL); 5519 } 5520 5521 if (mhp->ext[SADB_EXT_SA] == NULL || 5522 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5523 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5524 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5525 return key_senderror(so, m, EINVAL); 5526 } 5527 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5528 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5529 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5530 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5531 return key_senderror(so, m, EINVAL); 5532 } 5533 5534 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5535 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5536 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5537 5538 /* XXX boundary check against sa_len */ 5539 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5540 5541 /* get a SA header */ 5542 LIST_FOREACH(sah, &sahtree, chain) { 5543 if (sah->state == SADB_SASTATE_DEAD) 5544 continue; 5545 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5546 continue; 5547 5548 /* get a SA with SPI. */ 5549 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5550 if (sav) 5551 break; 5552 } 5553 if (sah == NULL) { 5554 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5555 return key_senderror(so, m, ENOENT); 5556 } 5557 5558 { 5559 struct mbuf *n; 5560 u_int8_t satype; 5561 5562 /* map proto to satype */ 5563 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5564 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5565 return key_senderror(so, m, EINVAL); 5566 } 5567 5568 /* create new sadb_msg to reply. */ 5569 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5570 mhp->msg->sadb_msg_pid); 5571 if (!n) 5572 return key_senderror(so, m, ENOBUFS); 5573 5574 m_freem(m); 5575 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5576 } 5577 } 5578 5579 /* XXX make it sysctl-configurable? */ 5580 static void 5581 key_getcomb_setlifetime(comb) 5582 struct sadb_comb *comb; 5583 { 5584 5585 comb->sadb_comb_soft_allocations = 1; 5586 comb->sadb_comb_hard_allocations = 1; 5587 comb->sadb_comb_soft_bytes = 0; 5588 comb->sadb_comb_hard_bytes = 0; 5589 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5590 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5591 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5592 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5593 } 5594 5595 /* 5596 * XXX reorder combinations by preference 5597 * XXX no idea if the user wants ESP authentication or not 5598 */ 5599 static struct mbuf * 5600 key_getcomb_esp() 5601 { 5602 struct sadb_comb *comb; 5603 struct enc_xform *algo; 5604 struct mbuf *result = NULL, *m, *n; 5605 int encmin; 5606 int i, off, o; 5607 int totlen; 5608 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5609 5610 m = NULL; 5611 for (i = 1; i <= SADB_EALG_MAX; i++) { 5612 algo = esp_algorithm_lookup(i); 5613 if (algo == NULL) 5614 continue; 5615 5616 /* discard algorithms with key size smaller than system min */ 5617 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5618 continue; 5619 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5620 encmin = ipsec_esp_keymin; 5621 else 5622 encmin = _BITS(algo->minkey); 5623 5624 if (ipsec_esp_auth) 5625 m = key_getcomb_ah(); 5626 else { 5627 IPSEC_ASSERT(l <= MLEN, 5628 ("key_getcomb_esp: l=%u > MLEN=%lu", 5629 l, (u_long) MLEN)); 5630 MGET(m, M_DONTWAIT, MT_DATA); 5631 if (m) { 5632 M_ALIGN(m, l); 5633 m->m_len = l; 5634 m->m_next = NULL; 5635 bzero(mtod(m, caddr_t), m->m_len); 5636 } 5637 } 5638 if (!m) 5639 goto fail; 5640 5641 totlen = 0; 5642 for (n = m; n; n = n->m_next) 5643 totlen += n->m_len; 5644 IPSEC_ASSERT((totlen % l) == 0, 5645 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5646 5647 for (off = 0; off < totlen; off += l) { 5648 n = m_pulldown(m, off, l, &o); 5649 if (!n) { 5650 /* m is already freed */ 5651 goto fail; 5652 } 5653 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5654 bzero(comb, sizeof(*comb)); 5655 key_getcomb_setlifetime(comb); 5656 comb->sadb_comb_encrypt = i; 5657 comb->sadb_comb_encrypt_minbits = encmin; 5658 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5659 } 5660 5661 if (!result) 5662 result = m; 5663 else 5664 m_cat(result, m); 5665 } 5666 5667 return result; 5668 5669 fail: 5670 if (result) 5671 m_freem(result); 5672 return NULL; 5673 } 5674 5675 static void 5676 key_getsizes_ah( 5677 const struct auth_hash *ah, 5678 int alg, 5679 u_int16_t* ksmin, 5680 u_int16_t* ksmax) 5681 { 5682 *ksmin = *ksmax = ah->keysize; 5683 if (ah->keysize == 0) { 5684 /* 5685 * Transform takes arbitrary key size but algorithm 5686 * key size is restricted. Enforce this here. 5687 */ 5688 switch (alg) { 5689 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5690 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5691 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 5692 default: 5693 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5694 alg)); 5695 break; 5696 } 5697 } 5698 } 5699 5700 /* 5701 * XXX reorder combinations by preference 5702 */ 5703 static struct mbuf * 5704 key_getcomb_ah() 5705 { 5706 struct sadb_comb *comb; 5707 struct auth_hash *algo; 5708 struct mbuf *m; 5709 u_int16_t minkeysize, maxkeysize; 5710 int i; 5711 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5712 5713 m = NULL; 5714 for (i = 1; i <= SADB_AALG_MAX; i++) { 5715 #if 1 5716 /* we prefer HMAC algorithms, not old algorithms */ 5717 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5718 continue; 5719 #endif 5720 algo = ah_algorithm_lookup(i); 5721 if (!algo) 5722 continue; 5723 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5724 /* discard algorithms with key size smaller than system min */ 5725 if (_BITS(minkeysize) < ipsec_ah_keymin) 5726 continue; 5727 5728 if (!m) { 5729 IPSEC_ASSERT(l <= MLEN, 5730 ("key_getcomb_ah: l=%u > MLEN=%lu", 5731 l, (u_long) MLEN)); 5732 MGET(m, M_DONTWAIT, MT_DATA); 5733 if (m) { 5734 M_ALIGN(m, l); 5735 m->m_len = l; 5736 m->m_next = NULL; 5737 } 5738 } else 5739 M_PREPEND(m, l, M_DONTWAIT); 5740 if (!m) 5741 return NULL; 5742 5743 comb = mtod(m, struct sadb_comb *); 5744 bzero(comb, sizeof(*comb)); 5745 key_getcomb_setlifetime(comb); 5746 comb->sadb_comb_auth = i; 5747 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5748 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5749 } 5750 5751 return m; 5752 } 5753 5754 /* 5755 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 5756 * XXX reorder combinations by preference 5757 */ 5758 static struct mbuf * 5759 key_getcomb_ipcomp() 5760 { 5761 struct sadb_comb *comb; 5762 struct comp_algo *algo; 5763 struct mbuf *m; 5764 int i; 5765 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5766 5767 m = NULL; 5768 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5769 algo = ipcomp_algorithm_lookup(i); 5770 if (!algo) 5771 continue; 5772 5773 if (!m) { 5774 IPSEC_ASSERT(l <= MLEN, 5775 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 5776 l, (u_long) MLEN)); 5777 MGET(m, M_DONTWAIT, MT_DATA); 5778 if (m) { 5779 M_ALIGN(m, l); 5780 m->m_len = l; 5781 m->m_next = NULL; 5782 } 5783 } else 5784 M_PREPEND(m, l, M_DONTWAIT); 5785 if (!m) 5786 return NULL; 5787 5788 comb = mtod(m, struct sadb_comb *); 5789 bzero(comb, sizeof(*comb)); 5790 key_getcomb_setlifetime(comb); 5791 comb->sadb_comb_encrypt = i; 5792 /* what should we set into sadb_comb_*_{min,max}bits? */ 5793 } 5794 5795 return m; 5796 } 5797 5798 /* 5799 * XXX no way to pass mode (transport/tunnel) to userland 5800 * XXX replay checking? 5801 * XXX sysctl interface to ipsec_{ah,esp}_keymin 5802 */ 5803 static struct mbuf * 5804 key_getprop(saidx) 5805 const struct secasindex *saidx; 5806 { 5807 struct sadb_prop *prop; 5808 struct mbuf *m, *n; 5809 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5810 int totlen; 5811 5812 switch (saidx->proto) { 5813 case IPPROTO_ESP: 5814 m = key_getcomb_esp(); 5815 break; 5816 case IPPROTO_AH: 5817 m = key_getcomb_ah(); 5818 break; 5819 case IPPROTO_IPCOMP: 5820 m = key_getcomb_ipcomp(); 5821 break; 5822 default: 5823 return NULL; 5824 } 5825 5826 if (!m) 5827 return NULL; 5828 M_PREPEND(m, l, M_DONTWAIT); 5829 if (!m) 5830 return NULL; 5831 5832 totlen = 0; 5833 for (n = m; n; n = n->m_next) 5834 totlen += n->m_len; 5835 5836 prop = mtod(m, struct sadb_prop *); 5837 bzero(prop, sizeof(*prop)); 5838 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5839 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5840 prop->sadb_prop_replay = 32; /* XXX */ 5841 5842 return m; 5843 } 5844 5845 /* 5846 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5847 * send 5848 * <base, SA, address(SD), (address(P)), x_policy, 5849 * (identity(SD),) (sensitivity,) proposal> 5850 * to KMD, and expect to receive 5851 * <base> with SADB_ACQUIRE if error occurred, 5852 * or 5853 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5854 * from KMD by PF_KEY. 5855 * 5856 * XXX x_policy is outside of RFC2367 (KAME extension). 5857 * XXX sensitivity is not supported. 5858 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5859 * see comment for key_getcomb_ipcomp(). 5860 * 5861 * OUT: 5862 * 0 : succeed 5863 * others: error number 5864 */ 5865 static int 5866 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5867 { 5868 struct mbuf *result = NULL, *m; 5869 #ifndef IPSEC_NONBLOCK_ACQUIRE 5870 struct secacq *newacq; 5871 #endif 5872 u_int8_t satype; 5873 int error = -1; 5874 u_int32_t seq; 5875 5876 /* sanity check */ 5877 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 5878 satype = key_proto2satype(saidx->proto); 5879 IPSEC_ASSERT(satype != 0, 5880 ("key_acquire: null satype, protocol %u", saidx->proto)); 5881 5882 #ifndef IPSEC_NONBLOCK_ACQUIRE 5883 /* 5884 * We never do anything about acquirng SA. There is anather 5885 * solution that kernel blocks to send SADB_ACQUIRE message until 5886 * getting something message from IKEd. In later case, to be 5887 * managed with ACQUIRING list. 5888 */ 5889 /* Get an entry to check whether sending message or not. */ 5890 if ((newacq = key_getacq(saidx)) != NULL) { 5891 if (key_blockacq_count < newacq->count) { 5892 /* reset counter and do send message. */ 5893 newacq->count = 0; 5894 } else { 5895 /* increment counter and do nothing. */ 5896 newacq->count++; 5897 return 0; 5898 } 5899 } else { 5900 /* make new entry for blocking to send SADB_ACQUIRE. */ 5901 if ((newacq = key_newacq(saidx)) == NULL) 5902 return ENOBUFS; 5903 5904 /* add to acqtree */ 5905 LIST_INSERT_HEAD(&acqtree, newacq, chain); 5906 } 5907 #endif 5908 5909 5910 #ifndef IPSEC_NONBLOCK_ACQUIRE 5911 seq = newacq->seq; 5912 #else 5913 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 5914 #endif 5915 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5916 if (!m) { 5917 error = ENOBUFS; 5918 goto fail; 5919 } 5920 result = m; 5921 5922 /* set sadb_address for saidx's. */ 5923 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5924 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5925 if (!m) { 5926 error = ENOBUFS; 5927 goto fail; 5928 } 5929 m_cat(result, m); 5930 5931 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5932 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5933 if (!m) { 5934 error = ENOBUFS; 5935 goto fail; 5936 } 5937 m_cat(result, m); 5938 5939 /* XXX proxy address (optional) */ 5940 5941 /* set sadb_x_policy */ 5942 if (sp) { 5943 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5944 if (!m) { 5945 error = ENOBUFS; 5946 goto fail; 5947 } 5948 m_cat(result, m); 5949 } 5950 5951 /* XXX identity (optional) */ 5952 #if 0 5953 if (idexttype && fqdn) { 5954 /* create identity extension (FQDN) */ 5955 struct sadb_ident *id; 5956 int fqdnlen; 5957 5958 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5959 id = (struct sadb_ident *)p; 5960 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5961 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5962 id->sadb_ident_exttype = idexttype; 5963 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5964 bcopy(fqdn, id + 1, fqdnlen); 5965 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5966 } 5967 5968 if (idexttype) { 5969 /* create identity extension (USERFQDN) */ 5970 struct sadb_ident *id; 5971 int userfqdnlen; 5972 5973 if (userfqdn) { 5974 /* +1 for terminating-NUL */ 5975 userfqdnlen = strlen(userfqdn) + 1; 5976 } else 5977 userfqdnlen = 0; 5978 id = (struct sadb_ident *)p; 5979 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5980 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5981 id->sadb_ident_exttype = idexttype; 5982 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5983 /* XXX is it correct? */ 5984 if (curlwp) 5985 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 5986 if (userfqdn && userfqdnlen) 5987 bcopy(userfqdn, id + 1, userfqdnlen); 5988 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5989 } 5990 #endif 5991 5992 /* XXX sensitivity (optional) */ 5993 5994 /* create proposal/combination extension */ 5995 m = key_getprop(saidx); 5996 #if 0 5997 /* 5998 * spec conformant: always attach proposal/combination extension, 5999 * the problem is that we have no way to attach it for ipcomp, 6000 * due to the way sadb_comb is declared in RFC2367. 6001 */ 6002 if (!m) { 6003 error = ENOBUFS; 6004 goto fail; 6005 } 6006 m_cat(result, m); 6007 #else 6008 /* 6009 * outside of spec; make proposal/combination extension optional. 6010 */ 6011 if (m) 6012 m_cat(result, m); 6013 #endif 6014 6015 if ((result->m_flags & M_PKTHDR) == 0) { 6016 error = EINVAL; 6017 goto fail; 6018 } 6019 6020 if (result->m_len < sizeof(struct sadb_msg)) { 6021 result = m_pullup(result, sizeof(struct sadb_msg)); 6022 if (result == NULL) { 6023 error = ENOBUFS; 6024 goto fail; 6025 } 6026 } 6027 6028 result->m_pkthdr.len = 0; 6029 for (m = result; m; m = m->m_next) 6030 result->m_pkthdr.len += m->m_len; 6031 6032 mtod(result, struct sadb_msg *)->sadb_msg_len = 6033 PFKEY_UNIT64(result->m_pkthdr.len); 6034 6035 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6036 6037 fail: 6038 if (result) 6039 m_freem(result); 6040 return error; 6041 } 6042 6043 #ifndef IPSEC_NONBLOCK_ACQUIRE 6044 static struct secacq * 6045 key_newacq(const struct secasindex *saidx) 6046 { 6047 struct secacq *newacq; 6048 6049 /* get new entry */ 6050 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6051 if (newacq == NULL) { 6052 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6053 return NULL; 6054 } 6055 bzero(newacq, sizeof(*newacq)); 6056 6057 /* copy secindex */ 6058 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6059 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6060 newacq->created = time_second; 6061 newacq->count = 0; 6062 6063 return newacq; 6064 } 6065 6066 static struct secacq * 6067 key_getacq(const struct secasindex *saidx) 6068 { 6069 struct secacq *acq; 6070 6071 LIST_FOREACH(acq, &acqtree, chain) { 6072 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6073 return acq; 6074 } 6075 6076 return NULL; 6077 } 6078 6079 static struct secacq * 6080 key_getacqbyseq(seq) 6081 u_int32_t seq; 6082 { 6083 struct secacq *acq; 6084 6085 LIST_FOREACH(acq, &acqtree, chain) { 6086 if (acq->seq == seq) 6087 return acq; 6088 } 6089 6090 return NULL; 6091 } 6092 #endif 6093 6094 static struct secspacq * 6095 key_newspacq(spidx) 6096 struct secpolicyindex *spidx; 6097 { 6098 struct secspacq *acq; 6099 6100 /* get new entry */ 6101 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6102 if (acq == NULL) { 6103 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6104 return NULL; 6105 } 6106 bzero(acq, sizeof(*acq)); 6107 6108 /* copy secindex */ 6109 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6110 acq->created = time_second; 6111 acq->count = 0; 6112 6113 return acq; 6114 } 6115 6116 static struct secspacq * 6117 key_getspacq(spidx) 6118 struct secpolicyindex *spidx; 6119 { 6120 struct secspacq *acq; 6121 6122 LIST_FOREACH(acq, &spacqtree, chain) { 6123 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6124 return acq; 6125 } 6126 6127 return NULL; 6128 } 6129 6130 /* 6131 * SADB_ACQUIRE processing, 6132 * in first situation, is receiving 6133 * <base> 6134 * from the ikmpd, and clear sequence of its secasvar entry. 6135 * 6136 * In second situation, is receiving 6137 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6138 * from a user land process, and return 6139 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6140 * to the socket. 6141 * 6142 * m will always be freed. 6143 */ 6144 static int 6145 key_acquire2(so, m, mhp) 6146 struct socket *so; 6147 struct mbuf *m; 6148 const struct sadb_msghdr *mhp; 6149 { 6150 const struct sadb_address *src0, *dst0; 6151 struct secasindex saidx; 6152 struct secashead *sah; 6153 u_int16_t proto; 6154 int error; 6155 6156 /* sanity check */ 6157 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6158 panic("key_acquire2: NULL pointer is passed"); 6159 6160 /* 6161 * Error message from KMd. 6162 * We assume that if error was occurred in IKEd, the length of PFKEY 6163 * message is equal to the size of sadb_msg structure. 6164 * We do not raise error even if error occurred in this function. 6165 */ 6166 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6167 #ifndef IPSEC_NONBLOCK_ACQUIRE 6168 struct secacq *acq; 6169 6170 /* check sequence number */ 6171 if (mhp->msg->sadb_msg_seq == 0) { 6172 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6173 m_freem(m); 6174 return 0; 6175 } 6176 6177 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6178 /* 6179 * the specified larval SA is already gone, or we got 6180 * a bogus sequence number. we can silently ignore it. 6181 */ 6182 m_freem(m); 6183 return 0; 6184 } 6185 6186 /* reset acq counter in order to deletion by timehander. */ 6187 acq->created = time_second; 6188 acq->count = 0; 6189 #endif 6190 m_freem(m); 6191 return 0; 6192 } 6193 6194 /* 6195 * This message is from user land. 6196 */ 6197 6198 /* map satype to proto */ 6199 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6200 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6201 return key_senderror(so, m, EINVAL); 6202 } 6203 6204 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6205 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6206 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6207 /* error */ 6208 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6209 return key_senderror(so, m, EINVAL); 6210 } 6211 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6212 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6213 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6214 /* error */ 6215 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6216 return key_senderror(so, m, EINVAL); 6217 } 6218 6219 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6220 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6221 6222 /* XXX boundary check against sa_len */ 6223 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6224 6225 /* get a SA index */ 6226 LIST_FOREACH(sah, &sahtree, chain) { 6227 if (sah->state == SADB_SASTATE_DEAD) 6228 continue; 6229 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6230 break; 6231 } 6232 if (sah != NULL) { 6233 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6234 return key_senderror(so, m, EEXIST); 6235 } 6236 6237 error = key_acquire(&saidx, NULL); 6238 if (error != 0) { 6239 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6240 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6241 return key_senderror(so, m, error); 6242 } 6243 6244 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6245 } 6246 6247 /* 6248 * SADB_REGISTER processing. 6249 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6250 * receive 6251 * <base> 6252 * from the ikmpd, and register a socket to send PF_KEY messages, 6253 * and send 6254 * <base, supported> 6255 * to KMD by PF_KEY. 6256 * If socket is detached, must free from regnode. 6257 * 6258 * m will always be freed. 6259 */ 6260 static int 6261 key_register(so, m, mhp) 6262 struct socket *so; 6263 struct mbuf *m; 6264 const struct sadb_msghdr *mhp; 6265 { 6266 struct secreg *reg, *newreg = 0; 6267 6268 /* sanity check */ 6269 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6270 panic("key_register: NULL pointer is passed"); 6271 6272 /* check for invalid register message */ 6273 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6274 return key_senderror(so, m, EINVAL); 6275 6276 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6277 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6278 goto setmsg; 6279 6280 /* check whether existing or not */ 6281 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6282 if (reg->so == so) { 6283 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6284 return key_senderror(so, m, EEXIST); 6285 } 6286 } 6287 6288 /* create regnode */ 6289 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6290 if (newreg == NULL) { 6291 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6292 return key_senderror(so, m, ENOBUFS); 6293 } 6294 bzero((caddr_t)newreg, sizeof(*newreg)); 6295 6296 newreg->so = so; 6297 ((struct keycb *)sotorawcb(so))->kp_registered++; 6298 6299 /* add regnode to regtree. */ 6300 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6301 6302 setmsg: 6303 { 6304 struct mbuf *n; 6305 struct sadb_msg *newmsg; 6306 struct sadb_supported *sup; 6307 u_int len, alen, elen; 6308 int off; 6309 int i; 6310 struct sadb_alg *alg; 6311 6312 /* create new sadb_msg to reply. */ 6313 alen = 0; 6314 for (i = 1; i <= SADB_AALG_MAX; i++) { 6315 if (ah_algorithm_lookup(i)) 6316 alen += sizeof(struct sadb_alg); 6317 } 6318 if (alen) 6319 alen += sizeof(struct sadb_supported); 6320 elen = 0; 6321 for (i = 1; i <= SADB_EALG_MAX; i++) { 6322 if (esp_algorithm_lookup(i)) 6323 elen += sizeof(struct sadb_alg); 6324 } 6325 if (elen) 6326 elen += sizeof(struct sadb_supported); 6327 6328 len = sizeof(struct sadb_msg) + alen + elen; 6329 6330 if (len > MCLBYTES) 6331 return key_senderror(so, m, ENOBUFS); 6332 6333 MGETHDR(n, M_DONTWAIT, MT_DATA); 6334 if (len > MHLEN) { 6335 MCLGET(n, M_DONTWAIT); 6336 if ((n->m_flags & M_EXT) == 0) { 6337 m_freem(n); 6338 n = NULL; 6339 } 6340 } 6341 if (!n) 6342 return key_senderror(so, m, ENOBUFS); 6343 6344 n->m_pkthdr.len = n->m_len = len; 6345 n->m_next = NULL; 6346 off = 0; 6347 6348 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6349 newmsg = mtod(n, struct sadb_msg *); 6350 newmsg->sadb_msg_errno = 0; 6351 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6352 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6353 6354 /* for authentication algorithm */ 6355 if (alen) { 6356 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6357 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6358 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6359 off += PFKEY_ALIGN8(sizeof(*sup)); 6360 6361 for (i = 1; i <= SADB_AALG_MAX; i++) { 6362 struct auth_hash *aalgo; 6363 u_int16_t minkeysize, maxkeysize; 6364 6365 aalgo = ah_algorithm_lookup(i); 6366 if (!aalgo) 6367 continue; 6368 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6369 alg->sadb_alg_id = i; 6370 alg->sadb_alg_ivlen = 0; 6371 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6372 alg->sadb_alg_minbits = _BITS(minkeysize); 6373 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6374 off += PFKEY_ALIGN8(sizeof(*alg)); 6375 } 6376 } 6377 6378 /* for encryption algorithm */ 6379 if (elen) { 6380 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6381 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6382 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6383 off += PFKEY_ALIGN8(sizeof(*sup)); 6384 6385 for (i = 1; i <= SADB_EALG_MAX; i++) { 6386 struct enc_xform *ealgo; 6387 6388 ealgo = esp_algorithm_lookup(i); 6389 if (!ealgo) 6390 continue; 6391 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6392 alg->sadb_alg_id = i; 6393 alg->sadb_alg_ivlen = ealgo->blocksize; 6394 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6395 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6396 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6397 } 6398 } 6399 6400 #ifdef DIAGNOSTIC 6401 if (off != len) 6402 panic("length assumption failed in key_register"); 6403 #endif 6404 6405 m_freem(m); 6406 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6407 } 6408 } 6409 6410 /* 6411 * free secreg entry registered. 6412 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6413 */ 6414 void 6415 key_freereg(so) 6416 struct socket *so; 6417 { 6418 struct secreg *reg; 6419 int i; 6420 6421 /* sanity check */ 6422 if (so == NULL) 6423 panic("key_freereg: NULL pointer is passed"); 6424 6425 /* 6426 * check whether existing or not. 6427 * check all type of SA, because there is a potential that 6428 * one socket is registered to multiple type of SA. 6429 */ 6430 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6431 LIST_FOREACH(reg, ®tree[i], chain) { 6432 if (reg->so == so 6433 && __LIST_CHAINED(reg)) { 6434 LIST_REMOVE(reg, chain); 6435 KFREE(reg); 6436 break; 6437 } 6438 } 6439 } 6440 6441 return; 6442 } 6443 6444 /* 6445 * SADB_EXPIRE processing 6446 * send 6447 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6448 * to KMD by PF_KEY. 6449 * NOTE: We send only soft lifetime extension. 6450 * 6451 * OUT: 0 : succeed 6452 * others : error number 6453 */ 6454 static int 6455 key_expire(sav) 6456 struct secasvar *sav; 6457 { 6458 int s; 6459 int satype; 6460 struct mbuf *result = NULL, *m; 6461 int len; 6462 int error = -1; 6463 struct sadb_lifetime *lt; 6464 6465 /* XXX: Why do we lock ? */ 6466 s = splsoftnet(); /*called from softclock()*/ 6467 6468 /* sanity check */ 6469 if (sav == NULL) 6470 panic("key_expire: NULL pointer is passed"); 6471 if (sav->sah == NULL) 6472 panic("key_expire: Why was SA index in SA NULL"); 6473 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6474 panic("key_expire: invalid proto is passed"); 6475 6476 /* set msg header */ 6477 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6478 if (!m) { 6479 error = ENOBUFS; 6480 goto fail; 6481 } 6482 result = m; 6483 6484 /* create SA extension */ 6485 m = key_setsadbsa(sav); 6486 if (!m) { 6487 error = ENOBUFS; 6488 goto fail; 6489 } 6490 m_cat(result, m); 6491 6492 /* create SA extension */ 6493 m = key_setsadbxsa2(sav->sah->saidx.mode, 6494 sav->replay ? sav->replay->count : 0, 6495 sav->sah->saidx.reqid); 6496 if (!m) { 6497 error = ENOBUFS; 6498 goto fail; 6499 } 6500 m_cat(result, m); 6501 6502 /* create lifetime extension (current and soft) */ 6503 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6504 m = key_alloc_mbuf(len); 6505 if (!m || m->m_next) { /*XXX*/ 6506 if (m) 6507 m_freem(m); 6508 error = ENOBUFS; 6509 goto fail; 6510 } 6511 bzero(mtod(m, caddr_t), len); 6512 lt = mtod(m, struct sadb_lifetime *); 6513 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6514 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6515 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6516 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6517 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6518 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6519 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6520 bcopy(sav->lft_s, lt, sizeof(*lt)); 6521 m_cat(result, m); 6522 6523 /* set sadb_address for source */ 6524 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6525 &sav->sah->saidx.src.sa, 6526 FULLMASK, IPSEC_ULPROTO_ANY); 6527 if (!m) { 6528 error = ENOBUFS; 6529 goto fail; 6530 } 6531 m_cat(result, m); 6532 6533 /* set sadb_address for destination */ 6534 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6535 &sav->sah->saidx.dst.sa, 6536 FULLMASK, IPSEC_ULPROTO_ANY); 6537 if (!m) { 6538 error = ENOBUFS; 6539 goto fail; 6540 } 6541 m_cat(result, m); 6542 6543 if ((result->m_flags & M_PKTHDR) == 0) { 6544 error = EINVAL; 6545 goto fail; 6546 } 6547 6548 if (result->m_len < sizeof(struct sadb_msg)) { 6549 result = m_pullup(result, sizeof(struct sadb_msg)); 6550 if (result == NULL) { 6551 error = ENOBUFS; 6552 goto fail; 6553 } 6554 } 6555 6556 result->m_pkthdr.len = 0; 6557 for (m = result; m; m = m->m_next) 6558 result->m_pkthdr.len += m->m_len; 6559 6560 mtod(result, struct sadb_msg *)->sadb_msg_len = 6561 PFKEY_UNIT64(result->m_pkthdr.len); 6562 6563 splx(s); 6564 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6565 6566 fail: 6567 if (result) 6568 m_freem(result); 6569 splx(s); 6570 return error; 6571 } 6572 6573 /* 6574 * SADB_FLUSH processing 6575 * receive 6576 * <base> 6577 * from the ikmpd, and free all entries in secastree. 6578 * and send, 6579 * <base> 6580 * to the ikmpd. 6581 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6582 * 6583 * m will always be freed. 6584 */ 6585 static int 6586 key_flush(so, m, mhp) 6587 struct socket *so; 6588 struct mbuf *m; 6589 const struct sadb_msghdr *mhp; 6590 { 6591 struct sadb_msg *newmsg; 6592 struct secashead *sah, *nextsah; 6593 struct secasvar *sav, *nextsav; 6594 u_int16_t proto; 6595 u_int8_t state; 6596 u_int stateidx; 6597 6598 /* sanity check */ 6599 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6600 panic("key_flush: NULL pointer is passed"); 6601 6602 /* map satype to proto */ 6603 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6604 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6605 return key_senderror(so, m, EINVAL); 6606 } 6607 6608 /* no SATYPE specified, i.e. flushing all SA. */ 6609 for (sah = LIST_FIRST(&sahtree); 6610 sah != NULL; 6611 sah = nextsah) { 6612 nextsah = LIST_NEXT(sah, chain); 6613 6614 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6615 && proto != sah->saidx.proto) 6616 continue; 6617 6618 for (stateidx = 0; 6619 stateidx < _ARRAYLEN(saorder_state_alive); 6620 stateidx++) { 6621 state = saorder_state_any[stateidx]; 6622 for (sav = LIST_FIRST(&sah->savtree[state]); 6623 sav != NULL; 6624 sav = nextsav) { 6625 6626 nextsav = LIST_NEXT(sav, chain); 6627 6628 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6629 KEY_FREESAV(&sav); 6630 } 6631 } 6632 6633 sah->state = SADB_SASTATE_DEAD; 6634 } 6635 6636 if (m->m_len < sizeof(struct sadb_msg) || 6637 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6638 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6639 return key_senderror(so, m, ENOBUFS); 6640 } 6641 6642 if (m->m_next) 6643 m_freem(m->m_next); 6644 m->m_next = NULL; 6645 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6646 newmsg = mtod(m, struct sadb_msg *); 6647 newmsg->sadb_msg_errno = 0; 6648 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6649 6650 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6651 } 6652 6653 6654 static struct mbuf * 6655 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6656 { 6657 struct secashead *sah; 6658 struct secasvar *sav; 6659 u_int16_t proto; 6660 u_int stateidx; 6661 u_int8_t satype; 6662 u_int8_t state; 6663 int cnt; 6664 struct mbuf *m, *n, *prev; 6665 int totlen; 6666 6667 *lenp = 0; 6668 6669 /* map satype to proto */ 6670 if ((proto = key_satype2proto(req_satype)) == 0) { 6671 *errorp = EINVAL; 6672 return (NULL); 6673 } 6674 6675 /* count sav entries to be sent to userland. */ 6676 cnt = 0; 6677 LIST_FOREACH(sah, &sahtree, chain) { 6678 if (req_satype != SADB_SATYPE_UNSPEC && 6679 proto != sah->saidx.proto) 6680 continue; 6681 6682 for (stateidx = 0; 6683 stateidx < _ARRAYLEN(saorder_state_any); 6684 stateidx++) { 6685 state = saorder_state_any[stateidx]; 6686 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6687 cnt++; 6688 } 6689 } 6690 } 6691 6692 if (cnt == 0) { 6693 *errorp = ENOENT; 6694 return (NULL); 6695 } 6696 6697 /* send this to the userland, one at a time. */ 6698 m = NULL; 6699 prev = m; 6700 LIST_FOREACH(sah, &sahtree, chain) { 6701 if (req_satype != SADB_SATYPE_UNSPEC && 6702 proto != sah->saidx.proto) 6703 continue; 6704 6705 /* map proto to satype */ 6706 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6707 m_freem(m); 6708 *errorp = EINVAL; 6709 return (NULL); 6710 } 6711 6712 for (stateidx = 0; 6713 stateidx < _ARRAYLEN(saorder_state_any); 6714 stateidx++) { 6715 state = saorder_state_any[stateidx]; 6716 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6717 n = key_setdumpsa(sav, SADB_DUMP, satype, 6718 --cnt, pid); 6719 if (!n) { 6720 m_freem(m); 6721 *errorp = ENOBUFS; 6722 return (NULL); 6723 } 6724 6725 totlen += n->m_pkthdr.len; 6726 if (!m) 6727 m = n; 6728 else 6729 prev->m_nextpkt = n; 6730 prev = n; 6731 } 6732 } 6733 } 6734 6735 if (!m) { 6736 *errorp = EINVAL; 6737 return (NULL); 6738 } 6739 6740 if ((m->m_flags & M_PKTHDR) != 0) { 6741 m->m_pkthdr.len = 0; 6742 for (n = m; n; n = n->m_next) 6743 m->m_pkthdr.len += n->m_len; 6744 } 6745 6746 *errorp = 0; 6747 return (m); 6748 } 6749 6750 /* 6751 * SADB_DUMP processing 6752 * dump all entries including status of DEAD in SAD. 6753 * receive 6754 * <base> 6755 * from the ikmpd, and dump all secasvar leaves 6756 * and send, 6757 * <base> ..... 6758 * to the ikmpd. 6759 * 6760 * m will always be freed. 6761 */ 6762 static int 6763 key_dump(so, m0, mhp) 6764 struct socket *so; 6765 struct mbuf *m0; 6766 const struct sadb_msghdr *mhp; 6767 { 6768 u_int16_t proto; 6769 u_int8_t satype; 6770 struct mbuf *n; 6771 int s; 6772 int error, len, ok; 6773 6774 /* sanity check */ 6775 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 6776 panic("key_dump: NULL pointer is passed"); 6777 6778 /* map satype to proto */ 6779 satype = mhp->msg->sadb_msg_satype; 6780 if ((proto = key_satype2proto(satype)) == 0) { 6781 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 6782 return key_senderror(so, m0, EINVAL); 6783 } 6784 6785 /* 6786 * If the requestor has insufficient socket-buffer space 6787 * for the entire chain, nobody gets any response to the DUMP. 6788 * XXX For now, only the requestor ever gets anything. 6789 * Moreover, if the requestor has any space at all, they receive 6790 * the entire chain, otherwise the request is refused with ENOBUFS. 6791 */ 6792 if (sbspace(&so->so_rcv) <= 0) { 6793 return key_senderror(so, m0, ENOBUFS); 6794 } 6795 6796 s = splsoftnet(); 6797 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 6798 splx(s); 6799 6800 if (n == NULL) { 6801 return key_senderror(so, m0, ENOENT); 6802 } 6803 pfkeystat.in_total++; 6804 pfkeystat.in_bytes += len; 6805 6806 /* 6807 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 6808 * The requestor receives either the entire chain, or an 6809 * error message with ENOBUFS. 6810 * 6811 * sbappendaddrchain() takes the chain of entries, one 6812 * packet-record per SPD entry, prepends the key_src sockaddr 6813 * to each packet-record, links the sockaddr mbufs into a new 6814 * list of records, then appends the entire resulting 6815 * list to the requesting socket. 6816 */ 6817 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 6818 n, SB_PRIO_ONESHOT_OVERFLOW); 6819 6820 if (!ok) { 6821 pfkeystat.in_nomem++; 6822 m_freem(n); 6823 return key_senderror(so, m0, ENOBUFS); 6824 } 6825 6826 m_freem(m0); 6827 return 0; 6828 } 6829 6830 /* 6831 * SADB_X_PROMISC processing 6832 * 6833 * m will always be freed. 6834 */ 6835 static int 6836 key_promisc(so, m, mhp) 6837 struct socket *so; 6838 struct mbuf *m; 6839 const struct sadb_msghdr *mhp; 6840 { 6841 int olen; 6842 6843 /* sanity check */ 6844 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6845 panic("key_promisc: NULL pointer is passed"); 6846 6847 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6848 6849 if (olen < sizeof(struct sadb_msg)) { 6850 #if 1 6851 return key_senderror(so, m, EINVAL); 6852 #else 6853 m_freem(m); 6854 return 0; 6855 #endif 6856 } else if (olen == sizeof(struct sadb_msg)) { 6857 /* enable/disable promisc mode */ 6858 struct keycb *kp; 6859 6860 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6861 return key_senderror(so, m, EINVAL); 6862 mhp->msg->sadb_msg_errno = 0; 6863 switch (mhp->msg->sadb_msg_satype) { 6864 case 0: 6865 case 1: 6866 kp->kp_promisc = mhp->msg->sadb_msg_satype; 6867 break; 6868 default: 6869 return key_senderror(so, m, EINVAL); 6870 } 6871 6872 /* send the original message back to everyone */ 6873 mhp->msg->sadb_msg_errno = 0; 6874 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6875 } else { 6876 /* send packet as is */ 6877 6878 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6879 6880 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6881 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6882 } 6883 } 6884 6885 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6886 const struct sadb_msghdr *)) = { 6887 NULL, /* SADB_RESERVED */ 6888 key_getspi, /* SADB_GETSPI */ 6889 key_update, /* SADB_UPDATE */ 6890 key_add, /* SADB_ADD */ 6891 key_delete, /* SADB_DELETE */ 6892 key_get, /* SADB_GET */ 6893 key_acquire2, /* SADB_ACQUIRE */ 6894 key_register, /* SADB_REGISTER */ 6895 NULL, /* SADB_EXPIRE */ 6896 key_flush, /* SADB_FLUSH */ 6897 key_dump, /* SADB_DUMP */ 6898 key_promisc, /* SADB_X_PROMISC */ 6899 NULL, /* SADB_X_PCHANGE */ 6900 key_spdadd, /* SADB_X_SPDUPDATE */ 6901 key_spdadd, /* SADB_X_SPDADD */ 6902 key_spddelete, /* SADB_X_SPDDELETE */ 6903 key_spdget, /* SADB_X_SPDGET */ 6904 NULL, /* SADB_X_SPDACQUIRE */ 6905 key_spddump, /* SADB_X_SPDDUMP */ 6906 key_spdflush, /* SADB_X_SPDFLUSH */ 6907 key_spdadd, /* SADB_X_SPDSETIDX */ 6908 NULL, /* SADB_X_SPDEXPIRE */ 6909 key_spddelete2, /* SADB_X_SPDDELETE2 */ 6910 NULL, /* SADB_X_NAT_T_NEW_MAPPING */ 6911 }; 6912 6913 /* 6914 * parse sadb_msg buffer to process PFKEYv2, 6915 * and create a data to response if needed. 6916 * I think to be dealed with mbuf directly. 6917 * IN: 6918 * msgp : pointer to pointer to a received buffer pulluped. 6919 * This is rewrited to response. 6920 * so : pointer to socket. 6921 * OUT: 6922 * length for buffer to send to user process. 6923 */ 6924 int 6925 key_parse(m, so) 6926 struct mbuf *m; 6927 struct socket *so; 6928 { 6929 struct sadb_msg *msg; 6930 struct sadb_msghdr mh; 6931 u_int orglen; 6932 int error; 6933 int target; 6934 6935 /* sanity check */ 6936 if (m == NULL || so == NULL) 6937 panic("key_parse: NULL pointer is passed"); 6938 6939 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6940 KEYDEBUG(KEYDEBUG_KEY_DUMP, 6941 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 6942 kdebug_sadb(msg)); 6943 #endif 6944 6945 if (m->m_len < sizeof(struct sadb_msg)) { 6946 m = m_pullup(m, sizeof(struct sadb_msg)); 6947 if (!m) 6948 return ENOBUFS; 6949 } 6950 msg = mtod(m, struct sadb_msg *); 6951 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6952 target = KEY_SENDUP_ONE; 6953 6954 if ((m->m_flags & M_PKTHDR) == 0 || 6955 m->m_pkthdr.len != m->m_pkthdr.len) { 6956 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 6957 pfkeystat.out_invlen++; 6958 error = EINVAL; 6959 goto senderror; 6960 } 6961 6962 if (msg->sadb_msg_version != PF_KEY_V2) { 6963 ipseclog((LOG_DEBUG, 6964 "key_parse: PF_KEY version %u is mismatched.\n", 6965 msg->sadb_msg_version)); 6966 pfkeystat.out_invver++; 6967 error = EINVAL; 6968 goto senderror; 6969 } 6970 6971 if (msg->sadb_msg_type > SADB_MAX) { 6972 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 6973 msg->sadb_msg_type)); 6974 pfkeystat.out_invmsgtype++; 6975 error = EINVAL; 6976 goto senderror; 6977 } 6978 6979 /* for old-fashioned code - should be nuked */ 6980 if (m->m_pkthdr.len > MCLBYTES) { 6981 m_freem(m); 6982 return ENOBUFS; 6983 } 6984 if (m->m_next) { 6985 struct mbuf *n; 6986 6987 MGETHDR(n, M_DONTWAIT, MT_DATA); 6988 if (n && m->m_pkthdr.len > MHLEN) { 6989 MCLGET(n, M_DONTWAIT); 6990 if ((n->m_flags & M_EXT) == 0) { 6991 m_free(n); 6992 n = NULL; 6993 } 6994 } 6995 if (!n) { 6996 m_freem(m); 6997 return ENOBUFS; 6998 } 6999 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7000 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7001 n->m_next = NULL; 7002 m_freem(m); 7003 m = n; 7004 } 7005 7006 /* align the mbuf chain so that extensions are in contiguous region. */ 7007 error = key_align(m, &mh); 7008 if (error) 7009 return error; 7010 7011 if (m->m_next) { /*XXX*/ 7012 m_freem(m); 7013 return ENOBUFS; 7014 } 7015 7016 msg = mh.msg; 7017 7018 /* check SA type */ 7019 switch (msg->sadb_msg_satype) { 7020 case SADB_SATYPE_UNSPEC: 7021 switch (msg->sadb_msg_type) { 7022 case SADB_GETSPI: 7023 case SADB_UPDATE: 7024 case SADB_ADD: 7025 case SADB_DELETE: 7026 case SADB_GET: 7027 case SADB_ACQUIRE: 7028 case SADB_EXPIRE: 7029 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7030 "when msg type=%u.\n", msg->sadb_msg_type)); 7031 pfkeystat.out_invsatype++; 7032 error = EINVAL; 7033 goto senderror; 7034 } 7035 break; 7036 case SADB_SATYPE_AH: 7037 case SADB_SATYPE_ESP: 7038 case SADB_X_SATYPE_IPCOMP: 7039 case SADB_X_SATYPE_TCPSIGNATURE: 7040 switch (msg->sadb_msg_type) { 7041 case SADB_X_SPDADD: 7042 case SADB_X_SPDDELETE: 7043 case SADB_X_SPDGET: 7044 case SADB_X_SPDDUMP: 7045 case SADB_X_SPDFLUSH: 7046 case SADB_X_SPDSETIDX: 7047 case SADB_X_SPDUPDATE: 7048 case SADB_X_SPDDELETE2: 7049 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7050 msg->sadb_msg_type)); 7051 pfkeystat.out_invsatype++; 7052 error = EINVAL; 7053 goto senderror; 7054 } 7055 break; 7056 case SADB_SATYPE_RSVP: 7057 case SADB_SATYPE_OSPFV2: 7058 case SADB_SATYPE_RIPV2: 7059 case SADB_SATYPE_MIP: 7060 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7061 msg->sadb_msg_satype)); 7062 pfkeystat.out_invsatype++; 7063 error = EOPNOTSUPP; 7064 goto senderror; 7065 case 1: /* XXX: What does it do? */ 7066 if (msg->sadb_msg_type == SADB_X_PROMISC) 7067 break; 7068 /*FALLTHROUGH*/ 7069 default: 7070 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7071 msg->sadb_msg_satype)); 7072 pfkeystat.out_invsatype++; 7073 error = EINVAL; 7074 goto senderror; 7075 } 7076 7077 /* check field of upper layer protocol and address family */ 7078 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7079 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7080 struct sadb_address *src0, *dst0; 7081 u_int plen; 7082 7083 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7084 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7085 7086 /* check upper layer protocol */ 7087 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7088 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7089 pfkeystat.out_invaddr++; 7090 error = EINVAL; 7091 goto senderror; 7092 } 7093 7094 /* check family */ 7095 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7096 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7097 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7098 pfkeystat.out_invaddr++; 7099 error = EINVAL; 7100 goto senderror; 7101 } 7102 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7103 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7104 ipseclog((LOG_DEBUG, 7105 "key_parse: address struct size mismatched.\n")); 7106 pfkeystat.out_invaddr++; 7107 error = EINVAL; 7108 goto senderror; 7109 } 7110 7111 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7112 case AF_INET: 7113 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7114 sizeof(struct sockaddr_in)) { 7115 pfkeystat.out_invaddr++; 7116 error = EINVAL; 7117 goto senderror; 7118 } 7119 break; 7120 case AF_INET6: 7121 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7122 sizeof(struct sockaddr_in6)) { 7123 pfkeystat.out_invaddr++; 7124 error = EINVAL; 7125 goto senderror; 7126 } 7127 break; 7128 default: 7129 ipseclog((LOG_DEBUG, 7130 "key_parse: unsupported address family.\n")); 7131 pfkeystat.out_invaddr++; 7132 error = EAFNOSUPPORT; 7133 goto senderror; 7134 } 7135 7136 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7137 case AF_INET: 7138 plen = sizeof(struct in_addr) << 3; 7139 break; 7140 case AF_INET6: 7141 plen = sizeof(struct in6_addr) << 3; 7142 break; 7143 default: 7144 plen = 0; /*fool gcc*/ 7145 break; 7146 } 7147 7148 /* check max prefix length */ 7149 if (src0->sadb_address_prefixlen > plen || 7150 dst0->sadb_address_prefixlen > plen) { 7151 ipseclog((LOG_DEBUG, 7152 "key_parse: illegal prefixlen.\n")); 7153 pfkeystat.out_invaddr++; 7154 error = EINVAL; 7155 goto senderror; 7156 } 7157 7158 /* 7159 * prefixlen == 0 is valid because there can be a case when 7160 * all addresses are matched. 7161 */ 7162 } 7163 7164 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7165 key_typesw[msg->sadb_msg_type] == NULL) { 7166 pfkeystat.out_invmsgtype++; 7167 error = EINVAL; 7168 goto senderror; 7169 } 7170 7171 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7172 7173 senderror: 7174 msg->sadb_msg_errno = error; 7175 return key_sendup_mbuf(so, m, target); 7176 } 7177 7178 static int 7179 key_senderror(so, m, code) 7180 struct socket *so; 7181 struct mbuf *m; 7182 int code; 7183 { 7184 struct sadb_msg *msg; 7185 7186 if (m->m_len < sizeof(struct sadb_msg)) 7187 panic("invalid mbuf passed to key_senderror"); 7188 7189 msg = mtod(m, struct sadb_msg *); 7190 msg->sadb_msg_errno = code; 7191 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7192 } 7193 7194 /* 7195 * set the pointer to each header into message buffer. 7196 * m will be freed on error. 7197 * XXX larger-than-MCLBYTES extension? 7198 */ 7199 static int 7200 key_align(m, mhp) 7201 struct mbuf *m; 7202 struct sadb_msghdr *mhp; 7203 { 7204 struct mbuf *n; 7205 struct sadb_ext *ext; 7206 size_t off, end; 7207 int extlen; 7208 int toff; 7209 7210 /* sanity check */ 7211 if (m == NULL || mhp == NULL) 7212 panic("key_align: NULL pointer is passed"); 7213 if (m->m_len < sizeof(struct sadb_msg)) 7214 panic("invalid mbuf passed to key_align"); 7215 7216 /* initialize */ 7217 bzero(mhp, sizeof(*mhp)); 7218 7219 mhp->msg = mtod(m, struct sadb_msg *); 7220 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7221 7222 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7223 extlen = end; /*just in case extlen is not updated*/ 7224 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7225 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7226 if (!n) { 7227 /* m is already freed */ 7228 return ENOBUFS; 7229 } 7230 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7231 7232 /* set pointer */ 7233 switch (ext->sadb_ext_type) { 7234 case SADB_EXT_SA: 7235 case SADB_EXT_ADDRESS_SRC: 7236 case SADB_EXT_ADDRESS_DST: 7237 case SADB_EXT_ADDRESS_PROXY: 7238 case SADB_EXT_LIFETIME_CURRENT: 7239 case SADB_EXT_LIFETIME_HARD: 7240 case SADB_EXT_LIFETIME_SOFT: 7241 case SADB_EXT_KEY_AUTH: 7242 case SADB_EXT_KEY_ENCRYPT: 7243 case SADB_EXT_IDENTITY_SRC: 7244 case SADB_EXT_IDENTITY_DST: 7245 case SADB_EXT_SENSITIVITY: 7246 case SADB_EXT_PROPOSAL: 7247 case SADB_EXT_SUPPORTED_AUTH: 7248 case SADB_EXT_SUPPORTED_ENCRYPT: 7249 case SADB_EXT_SPIRANGE: 7250 case SADB_X_EXT_POLICY: 7251 case SADB_X_EXT_SA2: 7252 /* duplicate check */ 7253 /* 7254 * XXX Are there duplication payloads of either 7255 * KEY_AUTH or KEY_ENCRYPT ? 7256 */ 7257 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7258 ipseclog((LOG_DEBUG, 7259 "key_align: duplicate ext_type %u " 7260 "is passed.\n", ext->sadb_ext_type)); 7261 m_freem(m); 7262 pfkeystat.out_dupext++; 7263 return EINVAL; 7264 } 7265 break; 7266 default: 7267 ipseclog((LOG_DEBUG, 7268 "key_align: invalid ext_type %u is passed.\n", 7269 ext->sadb_ext_type)); 7270 m_freem(m); 7271 pfkeystat.out_invexttype++; 7272 return EINVAL; 7273 } 7274 7275 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7276 7277 if (key_validate_ext(ext, extlen)) { 7278 m_freem(m); 7279 pfkeystat.out_invlen++; 7280 return EINVAL; 7281 } 7282 7283 n = m_pulldown(m, off, extlen, &toff); 7284 if (!n) { 7285 /* m is already freed */ 7286 return ENOBUFS; 7287 } 7288 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7289 7290 mhp->ext[ext->sadb_ext_type] = ext; 7291 mhp->extoff[ext->sadb_ext_type] = off; 7292 mhp->extlen[ext->sadb_ext_type] = extlen; 7293 } 7294 7295 if (off != end) { 7296 m_freem(m); 7297 pfkeystat.out_invlen++; 7298 return EINVAL; 7299 } 7300 7301 return 0; 7302 } 7303 7304 static int 7305 key_validate_ext(ext, len) 7306 const struct sadb_ext *ext; 7307 int len; 7308 { 7309 const struct sockaddr *sa; 7310 enum { NONE, ADDR } checktype = NONE; 7311 int baselen = 0; 7312 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7313 7314 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7315 return EINVAL; 7316 7317 /* if it does not match minimum/maximum length, bail */ 7318 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7319 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7320 return EINVAL; 7321 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7322 return EINVAL; 7323 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7324 return EINVAL; 7325 7326 /* more checks based on sadb_ext_type XXX need more */ 7327 switch (ext->sadb_ext_type) { 7328 case SADB_EXT_ADDRESS_SRC: 7329 case SADB_EXT_ADDRESS_DST: 7330 case SADB_EXT_ADDRESS_PROXY: 7331 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7332 checktype = ADDR; 7333 break; 7334 case SADB_EXT_IDENTITY_SRC: 7335 case SADB_EXT_IDENTITY_DST: 7336 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7337 SADB_X_IDENTTYPE_ADDR) { 7338 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7339 checktype = ADDR; 7340 } else 7341 checktype = NONE; 7342 break; 7343 default: 7344 checktype = NONE; 7345 break; 7346 } 7347 7348 switch (checktype) { 7349 case NONE: 7350 break; 7351 case ADDR: 7352 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7353 if (len < baselen + sal) 7354 return EINVAL; 7355 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7356 return EINVAL; 7357 break; 7358 } 7359 7360 return 0; 7361 } 7362 7363 void 7364 key_init() 7365 { 7366 int i; 7367 7368 callout_init(&key_timehandler_ch); 7369 7370 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7371 LIST_INIT(&sptree[i]); 7372 } 7373 7374 LIST_INIT(&sahtree); 7375 7376 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7377 LIST_INIT(®tree[i]); 7378 } 7379 7380 #ifndef IPSEC_NONBLOCK_ACQUIRE 7381 LIST_INIT(&acqtree); 7382 #endif 7383 LIST_INIT(&spacqtree); 7384 7385 /* system default */ 7386 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7387 ip4_def_policy.refcnt++; /*never reclaim this*/ 7388 7389 7390 #ifndef IPSEC_DEBUG2 7391 callout_reset(&key_timehandler_ch, hz, key_timehandler, (void *)0); 7392 #endif /*IPSEC_DEBUG2*/ 7393 7394 /* initialize key statistics */ 7395 keystat.getspi_count = 1; 7396 7397 printf("IPsec: Initialized Security Association Processing.\n"); 7398 7399 return; 7400 } 7401 7402 /* 7403 * XXX: maybe This function is called after INBOUND IPsec processing. 7404 * 7405 * Special check for tunnel-mode packets. 7406 * We must make some checks for consistency between inner and outer IP header. 7407 * 7408 * xxx more checks to be provided 7409 */ 7410 int 7411 key_checktunnelsanity( 7412 struct secasvar *sav, 7413 u_int family, 7414 caddr_t src, 7415 caddr_t dst 7416 ) 7417 { 7418 /* sanity check */ 7419 if (sav->sah == NULL) 7420 panic("sav->sah == NULL at key_checktunnelsanity"); 7421 7422 /* XXX: check inner IP header */ 7423 7424 return 1; 7425 } 7426 7427 #if 0 7428 #define hostnamelen strlen(hostname) 7429 7430 /* 7431 * Get FQDN for the host. 7432 * If the administrator configured hostname (by hostname(1)) without 7433 * domain name, returns nothing. 7434 */ 7435 static const char * 7436 key_getfqdn() 7437 { 7438 int i; 7439 int hasdot; 7440 static char fqdn[MAXHOSTNAMELEN + 1]; 7441 7442 if (!hostnamelen) 7443 return NULL; 7444 7445 /* check if it comes with domain name. */ 7446 hasdot = 0; 7447 for (i = 0; i < hostnamelen; i++) { 7448 if (hostname[i] == '.') 7449 hasdot++; 7450 } 7451 if (!hasdot) 7452 return NULL; 7453 7454 /* NOTE: hostname may not be NUL-terminated. */ 7455 bzero(fqdn, sizeof(fqdn)); 7456 bcopy(hostname, fqdn, hostnamelen); 7457 fqdn[hostnamelen] = '\0'; 7458 return fqdn; 7459 } 7460 7461 /* 7462 * get username@FQDN for the host/user. 7463 */ 7464 static const char * 7465 key_getuserfqdn() 7466 { 7467 const char *host; 7468 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7469 struct proc *p = curproc; 7470 char *q; 7471 7472 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7473 return NULL; 7474 if (!(host = key_getfqdn())) 7475 return NULL; 7476 7477 /* NOTE: s_login may not be-NUL terminated. */ 7478 bzero(userfqdn, sizeof(userfqdn)); 7479 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7480 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7481 q = userfqdn + strlen(userfqdn); 7482 *q++ = '@'; 7483 bcopy(host, q, strlen(host)); 7484 q += strlen(host); 7485 *q++ = '\0'; 7486 7487 return userfqdn; 7488 } 7489 #endif 7490 7491 /* record data transfer on SA, and update timestamps */ 7492 void 7493 key_sa_recordxfer(sav, m) 7494 struct secasvar *sav; 7495 struct mbuf *m; 7496 { 7497 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7498 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7499 if (!sav->lft_c) 7500 return; 7501 7502 /* 7503 * XXX Currently, there is a difference of bytes size 7504 * between inbound and outbound processing. 7505 */ 7506 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7507 /* to check bytes lifetime is done in key_timehandler(). */ 7508 7509 /* 7510 * We use the number of packets as the unit of 7511 * sadb_lifetime_allocations. We increment the variable 7512 * whenever {esp,ah}_{in,out}put is called. 7513 */ 7514 sav->lft_c->sadb_lifetime_allocations++; 7515 /* XXX check for expires? */ 7516 7517 /* 7518 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7519 * in seconds. HARD and SOFT lifetime are measured by the time 7520 * difference (again in seconds) from sadb_lifetime_usetime. 7521 * 7522 * usetime 7523 * v expire expire 7524 * -----+-----+--------+---> t 7525 * <--------------> HARD 7526 * <-----> SOFT 7527 */ 7528 sav->lft_c->sadb_lifetime_usetime = time_second; 7529 /* XXX check for expires? */ 7530 7531 return; 7532 } 7533 7534 /* dumb version */ 7535 void 7536 key_sa_routechange(dst) 7537 struct sockaddr *dst; 7538 { 7539 struct secashead *sah; 7540 struct route *ro; 7541 7542 LIST_FOREACH(sah, &sahtree, chain) { 7543 ro = &sah->sa_route; 7544 if (dst->sa_len == ro->ro_dst.sa_len && 7545 bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) 7546 rtcache_free(ro); 7547 } 7548 7549 return; 7550 } 7551 7552 static void 7553 key_sa_chgstate(sav, state) 7554 struct secasvar *sav; 7555 u_int8_t state; 7556 { 7557 if (sav == NULL) 7558 panic("key_sa_chgstate called with sav == NULL"); 7559 7560 if (sav->state == state) 7561 return; 7562 7563 if (__LIST_CHAINED(sav)) 7564 LIST_REMOVE(sav, chain); 7565 7566 sav->state = state; 7567 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7568 } 7569 7570 void 7571 key_sa_stir_iv(sav) 7572 struct secasvar *sav; 7573 { 7574 7575 if (!sav->iv) 7576 panic("key_sa_stir_iv called with sav == NULL"); 7577 key_randomfill(sav->iv, sav->ivlen); 7578 } 7579 7580 /* XXX too much? */ 7581 static struct mbuf * 7582 key_alloc_mbuf(l) 7583 int l; 7584 { 7585 struct mbuf *m = NULL, *n; 7586 int len, t; 7587 7588 len = l; 7589 while (len > 0) { 7590 MGET(n, M_DONTWAIT, MT_DATA); 7591 if (n && len > MLEN) 7592 MCLGET(n, M_DONTWAIT); 7593 if (!n) { 7594 m_freem(m); 7595 return NULL; 7596 } 7597 7598 n->m_next = NULL; 7599 n->m_len = 0; 7600 n->m_len = M_TRAILINGSPACE(n); 7601 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7602 if (n->m_len > len) { 7603 t = (n->m_len - len) & ~(sizeof(long) - 1); 7604 n->m_data += t; 7605 n->m_len = len; 7606 } 7607 7608 len -= n->m_len; 7609 7610 if (m) 7611 m_cat(m, n); 7612 else 7613 m = n; 7614 } 7615 7616 return m; 7617 } 7618 7619 static struct mbuf * 7620 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7621 { 7622 struct secashead *sah; 7623 struct secasvar *sav; 7624 u_int16_t proto; 7625 u_int stateidx; 7626 u_int8_t satype; 7627 u_int8_t state; 7628 int cnt; 7629 struct mbuf *m, *n; 7630 7631 /* map satype to proto */ 7632 if ((proto = key_satype2proto(req_satype)) == 0) { 7633 *errorp = EINVAL; 7634 return (NULL); 7635 } 7636 7637 /* count sav entries to be sent to the userland. */ 7638 cnt = 0; 7639 LIST_FOREACH(sah, &sahtree, chain) { 7640 if (req_satype != SADB_SATYPE_UNSPEC && 7641 proto != sah->saidx.proto) 7642 continue; 7643 7644 for (stateidx = 0; 7645 stateidx < _ARRAYLEN(saorder_state_any); 7646 stateidx++) { 7647 state = saorder_state_any[stateidx]; 7648 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7649 cnt++; 7650 } 7651 } 7652 } 7653 7654 if (cnt == 0) { 7655 *errorp = ENOENT; 7656 return (NULL); 7657 } 7658 7659 /* send this to the userland, one at a time. */ 7660 m = NULL; 7661 LIST_FOREACH(sah, &sahtree, chain) { 7662 if (req_satype != SADB_SATYPE_UNSPEC && 7663 proto != sah->saidx.proto) 7664 continue; 7665 7666 /* map proto to satype */ 7667 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7668 m_freem(m); 7669 *errorp = EINVAL; 7670 return (NULL); 7671 } 7672 7673 for (stateidx = 0; 7674 stateidx < _ARRAYLEN(saorder_state_any); 7675 stateidx++) { 7676 state = saorder_state_any[stateidx]; 7677 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7678 n = key_setdumpsa(sav, SADB_DUMP, satype, 7679 --cnt, pid); 7680 if (!n) { 7681 m_freem(m); 7682 *errorp = ENOBUFS; 7683 return (NULL); 7684 } 7685 7686 if (!m) 7687 m = n; 7688 else 7689 m_cat(m, n); 7690 } 7691 } 7692 } 7693 7694 if (!m) { 7695 *errorp = EINVAL; 7696 return (NULL); 7697 } 7698 7699 if ((m->m_flags & M_PKTHDR) != 0) { 7700 m->m_pkthdr.len = 0; 7701 for (n = m; n; n = n->m_next) 7702 m->m_pkthdr.len += n->m_len; 7703 } 7704 7705 *errorp = 0; 7706 return (m); 7707 } 7708 7709 static struct mbuf * 7710 key_setspddump(int *errorp, pid_t pid) 7711 { 7712 struct secpolicy *sp; 7713 int cnt; 7714 u_int dir; 7715 struct mbuf *m, *n; 7716 7717 /* search SPD entry and get buffer size. */ 7718 cnt = 0; 7719 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7720 LIST_FOREACH(sp, &sptree[dir], chain) { 7721 cnt++; 7722 } 7723 } 7724 7725 if (cnt == 0) { 7726 *errorp = ENOENT; 7727 return (NULL); 7728 } 7729 7730 m = NULL; 7731 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7732 LIST_FOREACH(sp, &sptree[dir], chain) { 7733 --cnt; 7734 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7735 7736 if (!n) { 7737 *errorp = ENOBUFS; 7738 m_freem(m); 7739 return (NULL); 7740 } 7741 if (!m) 7742 m = n; 7743 else { 7744 m->m_pkthdr.len += n->m_pkthdr.len; 7745 m_cat(m, n); 7746 } 7747 } 7748 } 7749 7750 *errorp = 0; 7751 return (m); 7752 } 7753 7754 static int 7755 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 7756 { 7757 struct mbuf *m, *n; 7758 int err2 = 0; 7759 char *p, *ep; 7760 size_t len; 7761 int s, error; 7762 7763 if (newp) 7764 return (EPERM); 7765 if (namelen != 1) 7766 return (EINVAL); 7767 7768 s = splsoftnet(); 7769 m = key_setdump(name[0], &error, l->l_proc->p_pid); 7770 splx(s); 7771 if (!m) 7772 return (error); 7773 if (!oldp) 7774 *oldlenp = m->m_pkthdr.len; 7775 else { 7776 p = oldp; 7777 if (*oldlenp < m->m_pkthdr.len) { 7778 err2 = ENOMEM; 7779 ep = p + *oldlenp; 7780 } else { 7781 *oldlenp = m->m_pkthdr.len; 7782 ep = p + m->m_pkthdr.len; 7783 } 7784 for (n = m; n; n = n->m_next) { 7785 len = (ep - p < n->m_len) ? 7786 ep - p : n->m_len; 7787 error = copyout(mtod(n, const void *), p, len); 7788 p += len; 7789 if (error) 7790 break; 7791 } 7792 if (error == 0) 7793 error = err2; 7794 } 7795 m_freem(m); 7796 7797 return (error); 7798 } 7799 7800 static int 7801 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 7802 { 7803 struct mbuf *m, *n; 7804 int err2 = 0; 7805 char *p, *ep; 7806 size_t len; 7807 int s, error; 7808 7809 if (newp) 7810 return (EPERM); 7811 if (namelen != 0) 7812 return (EINVAL); 7813 7814 s = splsoftnet(); 7815 m = key_setspddump(&error, l->l_proc->p_pid); 7816 splx(s); 7817 if (!m) 7818 return (error); 7819 if (!oldp) 7820 *oldlenp = m->m_pkthdr.len; 7821 else { 7822 p = oldp; 7823 if (*oldlenp < m->m_pkthdr.len) { 7824 err2 = ENOMEM; 7825 ep = p + *oldlenp; 7826 } else { 7827 *oldlenp = m->m_pkthdr.len; 7828 ep = p + m->m_pkthdr.len; 7829 } 7830 for (n = m; n; n = n->m_next) { 7831 len = (ep - p < n->m_len) ? 7832 ep - p : n->m_len; 7833 error = copyout(mtod(n, const void *), p, len); 7834 p += len; 7835 if (error) 7836 break; 7837 } 7838 if (error == 0) 7839 error = err2; 7840 } 7841 m_freem(m); 7842 7843 return (error); 7844 } 7845 7846 /* 7847 * Create sysctl tree for native FAST_IPSEC key knobs, originally 7848 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 7849 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 7850 * and in any case the part of our sysctl namespace used for dumping the 7851 * SPD and SA database *HAS* to be compatible with the KAME sysctl 7852 * namespace, for API reasons. 7853 * 7854 * Pending a consensus on the right way to fix this, add a level of 7855 * indirection in how we number the `native' FAST_IPSEC key nodes; 7856 * and (as requested by Andrew Brown) move registration of the 7857 * KAME-compatible names to a separate function. 7858 */ 7859 #if 0 7860 # define FAST_IPSEC_PFKEY PF_KEY_V2 7861 # define FAST_IPSEC_PFKEY_NAME "keyv2" 7862 #else 7863 # define FAST_IPSEC_PFKEY PF_KEY 7864 # define FAST_IPSEC_PFKEY_NAME "key" 7865 #endif 7866 7867 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 7868 { 7869 7870 sysctl_createv(clog, 0, NULL, NULL, 7871 CTLFLAG_PERMANENT, 7872 CTLTYPE_NODE, "net", NULL, 7873 NULL, 0, NULL, 0, 7874 CTL_NET, CTL_EOL); 7875 sysctl_createv(clog, 0, NULL, NULL, 7876 CTLFLAG_PERMANENT, 7877 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 7878 NULL, 0, NULL, 0, 7879 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 7880 7881 sysctl_createv(clog, 0, NULL, NULL, 7882 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7883 CTLTYPE_INT, "debug", NULL, 7884 NULL, 0, &key_debug_level, 0, 7885 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 7886 sysctl_createv(clog, 0, NULL, NULL, 7887 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7888 CTLTYPE_INT, "spi_try", NULL, 7889 NULL, 0, &key_spi_trycnt, 0, 7890 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 7891 sysctl_createv(clog, 0, NULL, NULL, 7892 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7893 CTLTYPE_INT, "spi_min_value", NULL, 7894 NULL, 0, &key_spi_minval, 0, 7895 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 7896 sysctl_createv(clog, 0, NULL, NULL, 7897 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7898 CTLTYPE_INT, "spi_max_value", NULL, 7899 NULL, 0, &key_spi_maxval, 0, 7900 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 7901 sysctl_createv(clog, 0, NULL, NULL, 7902 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7903 CTLTYPE_INT, "random_int", NULL, 7904 NULL, 0, &key_int_random, 0, 7905 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 7906 sysctl_createv(clog, 0, NULL, NULL, 7907 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7908 CTLTYPE_INT, "larval_lifetime", NULL, 7909 NULL, 0, &key_larval_lifetime, 0, 7910 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 7911 sysctl_createv(clog, 0, NULL, NULL, 7912 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7913 CTLTYPE_INT, "blockacq_count", NULL, 7914 NULL, 0, &key_blockacq_count, 0, 7915 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 7916 sysctl_createv(clog, 0, NULL, NULL, 7917 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7918 CTLTYPE_INT, "blockacq_lifetime", NULL, 7919 NULL, 0, &key_blockacq_lifetime, 0, 7920 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 7921 sysctl_createv(clog, 0, NULL, NULL, 7922 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7923 CTLTYPE_INT, "esp_keymin", NULL, 7924 NULL, 0, &ipsec_esp_keymin, 0, 7925 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 7926 sysctl_createv(clog, 0, NULL, NULL, 7927 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7928 CTLTYPE_INT, "prefered_oldsa", NULL, 7929 NULL, 0, &key_prefered_oldsa, 0, 7930 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 7931 sysctl_createv(clog, 0, NULL, NULL, 7932 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7933 CTLTYPE_INT, "esp_auth", NULL, 7934 NULL, 0, &ipsec_esp_auth, 0, 7935 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 7936 sysctl_createv(clog, 0, NULL, NULL, 7937 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 7938 CTLTYPE_INT, "ah_keymin", NULL, 7939 NULL, 0, &ipsec_ah_keymin, 0, 7940 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 7941 } 7942 7943 /* 7944 * Register sysctl names used by setkey(8). For historical reasons, 7945 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 7946 * for both FAST_IPSEC and KAME IPSEC. 7947 */ 7948 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 7949 { 7950 7951 /* Make sure net.key exists before we register nodes underneath it. */ 7952 sysctl_createv(clog, 0, NULL, NULL, 7953 CTLFLAG_PERMANENT, 7954 CTLTYPE_NODE, "net", NULL, 7955 NULL, 0, NULL, 0, 7956 CTL_NET, CTL_EOL); 7957 sysctl_createv(clog, 0, NULL, NULL, 7958 CTLFLAG_PERMANENT, 7959 CTLTYPE_NODE, "key", NULL, 7960 NULL, 0, NULL, 0, 7961 CTL_NET, PF_KEY, CTL_EOL); 7962 7963 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 7964 sysctl_createv(clog, 0, NULL, NULL, 7965 CTLFLAG_PERMANENT, 7966 CTLTYPE_STRUCT, "dumpsa", NULL, 7967 sysctl_net_key_dumpsa, 0, NULL, 0, 7968 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 7969 sysctl_createv(clog, 0, NULL, NULL, 7970 CTLFLAG_PERMANENT, 7971 CTLTYPE_STRUCT, "dumpsp", NULL, 7972 sysctl_net_key_dumpsp, 0, NULL, 0, 7973 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 7974 } 7975
Indexes created Tue Sep 23 07:09:52 GMT 2025