key.c revision 191599
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 191599 2009-04-27 21:04:16Z bz $ */ 2105197Ssam/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 3105197Ssam 4139823Simp/*- 5105197Ssam * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6105197Ssam * All rights reserved. 7105197Ssam * 8105197Ssam * Redistribution and use in source and binary forms, with or without 9105197Ssam * modification, are permitted provided that the following conditions 10105197Ssam * are met: 11105197Ssam * 1. Redistributions of source code must retain the above copyright 12105197Ssam * notice, this list of conditions and the following disclaimer. 13105197Ssam * 2. Redistributions in binary form must reproduce the above copyright 14105197Ssam * notice, this list of conditions and the following disclaimer in the 15105197Ssam * documentation and/or other materials provided with the distribution. 16105197Ssam * 3. Neither the name of the project nor the names of its contributors 17105197Ssam * may be used to endorse or promote products derived from this software 18105197Ssam * without specific prior written permission. 19105197Ssam * 20105197Ssam * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21105197Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22105197Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23105197Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24105197Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25105197Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26105197Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27105197Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28105197Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29105197Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30105197Ssam * SUCH DAMAGE. 31105197Ssam */ 32105197Ssam 33105197Ssam/* 34105197Ssam * This code is referd to RFC 2367 35105197Ssam */ 36105197Ssam 37105197Ssam#include "opt_inet.h" 38105197Ssam#include "opt_inet6.h" 39105197Ssam#include "opt_ipsec.h" 40105197Ssam 41105197Ssam#include <sys/types.h> 42105197Ssam#include <sys/param.h> 43105197Ssam#include <sys/systm.h> 44105197Ssam#include <sys/kernel.h> 45119643Ssam#include <sys/lock.h> 46119643Ssam#include <sys/mutex.h> 47105197Ssam#include <sys/mbuf.h> 48105197Ssam#include <sys/domain.h> 49105197Ssam#include <sys/protosw.h> 50105197Ssam#include <sys/malloc.h> 51105197Ssam#include <sys/socket.h> 52105197Ssam#include <sys/socketvar.h> 53105197Ssam#include <sys/sysctl.h> 54105197Ssam#include <sys/errno.h> 55105197Ssam#include <sys/proc.h> 56105197Ssam#include <sys/queue.h> 57158767Spjd#include <sys/refcount.h> 58105197Ssam#include <sys/syslog.h> 59183550Szec#include <sys/vimage.h> 60105197Ssam 61105197Ssam#include <net/if.h> 62105197Ssam#include <net/route.h> 63105197Ssam#include <net/raw_cb.h> 64105197Ssam 65105197Ssam#include <netinet/in.h> 66105197Ssam#include <netinet/in_systm.h> 67105197Ssam#include <netinet/ip.h> 68105197Ssam#include <netinet/in_var.h> 69105197Ssam 70105197Ssam#ifdef INET6 71105197Ssam#include <netinet/ip6.h> 72105197Ssam#include <netinet6/in6_var.h> 73105197Ssam#include <netinet6/ip6_var.h> 74105197Ssam#endif /* INET6 */ 75105197Ssam 76105197Ssam#ifdef INET 77105197Ssam#include <netinet/in_pcb.h> 78185571Sbz#include <netinet/vinet.h> 79105197Ssam#endif 80105197Ssam#ifdef INET6 81105197Ssam#include <netinet6/in6_pcb.h> 82185571Sbz#include <netinet6/vinet6.h> 83105197Ssam#endif /* INET6 */ 84105197Ssam 85105197Ssam#include <net/pfkeyv2.h> 86105197Ssam#include <netipsec/keydb.h> 87105197Ssam#include <netipsec/key.h> 88105197Ssam#include <netipsec/keysock.h> 89105197Ssam#include <netipsec/key_debug.h> 90105197Ssam 91105197Ssam#include <netipsec/ipsec.h> 92105197Ssam#ifdef INET6 93105197Ssam#include <netipsec/ipsec6.h> 94105197Ssam#endif 95105197Ssam 96105197Ssam#include <netipsec/xform.h> 97105197Ssam 98105197Ssam#include <machine/stdarg.h> 99105197Ssam 100105197Ssam/* randomness */ 101105197Ssam#include <sys/random.h> 102181803Sbz#include <sys/vimage.h> 103105197Ssam 104105197Ssam#define FULLMASK 0xff 105105197Ssam#define _BITS(bytes) ((bytes) << 3) 106105197Ssam 107105197Ssam/* 108105197Ssam * Note on SA reference counting: 109105197Ssam * - SAs that are not in DEAD state will have (total external reference + 1) 110105197Ssam * following value in reference count field. they cannot be freed and are 111105197Ssam * referenced from SA header. 112105197Ssam * - SAs that are in DEAD state will have (total external reference) 113105197Ssam * in reference count field. they are ready to be freed. reference from 114105197Ssam * SA header will be removed in key_delsav(), when the reference count 115105197Ssam * field hits 0 (= no external reference other than from SA header. 116105197Ssam */ 117105197Ssam 118185088Szec#ifdef VIMAGE_GLOBALS 119185088Szecu_int32_t key_debug_level; 120185088Szecstatic u_int key_spi_trycnt; 121185088Szecstatic u_int32_t key_spi_minval; 122185088Szecstatic u_int32_t key_spi_maxval; 123185088Szecstatic u_int32_t policy_id; 124185088Szecstatic u_int key_int_random; 125185088Szecstatic u_int key_larval_lifetime; 126185088Szecstatic int key_blockacq_count; 127185088Szecstatic int key_blockacq_lifetime; 128185088Szecstatic int key_preferred_oldsa; 129105197Ssam 130185088Szecstatic u_int32_t acq_seq; 131105197Ssam 132185088Szecstatic int ipsec_esp_keymin; 133185088Szecstatic int ipsec_esp_auth; 134185088Szecstatic int ipsec_ah_keymin; 135185088Szec 136105197Ssamstatic LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 137185088Szecstatic LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 138185088Szecstatic LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 139185088Szecstatic LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 140185088Szecstatic LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 141185088Szec#endif /* VIMAGE_GLOBALS */ 142185088Szec 143119643Ssamstatic struct mtx sptree_lock; 144120585Ssam#define SPTREE_LOCK_INIT() \ 145120585Ssam mtx_init(&sptree_lock, "sptree", \ 146120585Ssam "fast ipsec security policy database", MTX_DEF) 147120585Ssam#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 148120585Ssam#define SPTREE_LOCK() mtx_lock(&sptree_lock) 149120585Ssam#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 150120585Ssam#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 151120585Ssam 152119643Ssamstatic struct mtx sahtree_lock; 153120585Ssam#define SAHTREE_LOCK_INIT() \ 154120585Ssam mtx_init(&sahtree_lock, "sahtree", \ 155120585Ssam "fast ipsec security association database", MTX_DEF) 156120585Ssam#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 157120585Ssam#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 158120585Ssam#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 159120585Ssam#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 160120585Ssam 161119643Ssam /* registed list */ 162119643Ssamstatic struct mtx regtree_lock; 163120585Ssam#define REGTREE_LOCK_INIT() \ 164120585Ssam mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 165120585Ssam#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 166120585Ssam#define REGTREE_LOCK() mtx_lock(®tree_lock) 167120585Ssam#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 168120585Ssam#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 169120585Ssam 170119643Ssamstatic struct mtx acq_lock; 171120585Ssam#define ACQ_LOCK_INIT() \ 172120585Ssam mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 173120585Ssam#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 174120585Ssam#define ACQ_LOCK() mtx_lock(&acq_lock) 175120585Ssam#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 176120585Ssam#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 177120585Ssam 178119643Ssamstatic struct mtx spacq_lock; 179120585Ssam#define SPACQ_LOCK_INIT() \ 180120585Ssam mtx_init(&spacq_lock, "spacqtree", \ 181120585Ssam "fast ipsec security policy acquire list", MTX_DEF) 182120585Ssam#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 183120585Ssam#define SPACQ_LOCK() mtx_lock(&spacq_lock) 184120585Ssam#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 185120585Ssam#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 186105197Ssam 187105197Ssam/* search order for SAs */ 188128856Ssamstatic const u_int saorder_state_valid_prefer_old[] = { 189105197Ssam SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 190105197Ssam}; 191128856Ssamstatic const u_int saorder_state_valid_prefer_new[] = { 192128856Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 193128856Ssam}; 194185348Szecstatic const u_int saorder_state_alive[] = { 195105197Ssam /* except DEAD */ 196105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 197105197Ssam}; 198185348Szecstatic const u_int saorder_state_any[] = { 199105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 200105197Ssam SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 201105197Ssam}; 202105197Ssam 203105197Ssamstatic const int minsize[] = { 204105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 205105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 206105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 207105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 208105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 209105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 210105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 211105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 212105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 213105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 214105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 215105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 216105197Ssam sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 217105197Ssam sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 218105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 219105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 220105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 221105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 222105197Ssam sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 223105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 224105197Ssam}; 225105197Ssamstatic const int maxsize[] = { 226105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 227105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 228105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 229105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 230105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 231105197Ssam 0, /* SADB_EXT_ADDRESS_SRC */ 232105197Ssam 0, /* SADB_EXT_ADDRESS_DST */ 233105197Ssam 0, /* SADB_EXT_ADDRESS_PROXY */ 234105197Ssam 0, /* SADB_EXT_KEY_AUTH */ 235105197Ssam 0, /* SADB_EXT_KEY_ENCRYPT */ 236105197Ssam 0, /* SADB_EXT_IDENTITY_SRC */ 237105197Ssam 0, /* SADB_EXT_IDENTITY_DST */ 238105197Ssam 0, /* SADB_EXT_SENSITIVITY */ 239105197Ssam 0, /* SADB_EXT_PROPOSAL */ 240105197Ssam 0, /* SADB_EXT_SUPPORTED_AUTH */ 241105197Ssam 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 242105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 243105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 244105197Ssam 0, /* SADB_X_EXT_POLICY */ 245105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 246105197Ssam}; 247105197Ssam 248105197Ssam#ifdef SYSCTL_DECL 249105197SsamSYSCTL_DECL(_net_key); 250105197Ssam#endif 251105197Ssam 252183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_DEBUG_LEVEL, debug, 253183550Szec CTLFLAG_RW, key_debug_level, 0, ""); 254105197Ssam 255105197Ssam/* max count of trial for the decision of spi value */ 256183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_SPI_TRY, spi_trycnt, 257183550Szec CTLFLAG_RW, key_spi_trycnt, 0, ""); 258105197Ssam 259105197Ssam/* minimum spi value to allocate automatically. */ 260183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MIN_VALUE, 261183550Szec spi_minval, CTLFLAG_RW, key_spi_minval, 0, ""); 262105197Ssam 263105197Ssam/* maximun spi value to allocate automatically. */ 264183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MAX_VALUE, 265183550Szec spi_maxval, CTLFLAG_RW, key_spi_maxval, 0, ""); 266105197Ssam 267105197Ssam/* interval to initialize randseed */ 268183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_RANDOM_INT, 269183550Szec int_random, CTLFLAG_RW, key_int_random, 0, ""); 270105197Ssam 271105197Ssam/* lifetime for larval SA */ 272183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_LARVAL_LIFETIME, 273183550Szec larval_lifetime, CTLFLAG_RW, key_larval_lifetime, 0, ""); 274105197Ssam 275105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 276183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_COUNT, 277183550Szec blockacq_count, CTLFLAG_RW, key_blockacq_count, 0, ""); 278105197Ssam 279105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 280183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_LIFETIME, 281183550Szec blockacq_lifetime, CTLFLAG_RW, key_blockacq_lifetime, 0, ""); 282105197Ssam 283105197Ssam/* ESP auth */ 284183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_AUTH, esp_auth, 285183550Szec CTLFLAG_RW, ipsec_esp_auth, 0, ""); 286105197Ssam 287105197Ssam/* minimum ESP key length */ 288183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_KEYMIN, 289183550Szec esp_keymin, CTLFLAG_RW, ipsec_esp_keymin, 0, ""); 290105197Ssam 291105197Ssam/* minimum AH key length */ 292183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_AH_KEYMIN, ah_keymin, 293183550Szec CTLFLAG_RW, ipsec_ah_keymin, 0, ""); 294105197Ssam 295105197Ssam/* perfered old SA rather than new SA */ 296183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_PREFERED_OLDSA, 297183550Szec preferred_oldsa, CTLFLAG_RW, key_preferred_oldsa, 0, ""); 298105197Ssam 299105197Ssam#define __LIST_CHAINED(elm) \ 300105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 301105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 302105197Ssamdo {\ 303105197Ssam struct type *curelm = LIST_FIRST(head); \ 304105197Ssam if (curelm == NULL) {\ 305105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 306105197Ssam } else { \ 307105197Ssam while (LIST_NEXT(curelm, field)) \ 308105197Ssam curelm = LIST_NEXT(curelm, field);\ 309105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 310105197Ssam }\ 311105197Ssam} while (0) 312105197Ssam 313105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 314105197Ssamdo { \ 315105197Ssam if ((head) != (sav)) { \ 316105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 317105197Ssam (name), (head), (sav))); \ 318105197Ssam continue; \ 319105197Ssam } \ 320105197Ssam} while (0) 321105197Ssam 322105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 323105197Ssamdo { \ 324105197Ssam if ((head) != (sp)) { \ 325105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 326105197Ssam "anyway continue.\n", \ 327105197Ssam (name), (head), (sp))); \ 328105197Ssam } \ 329105197Ssam} while (0) 330105197Ssam 331119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 332119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 333119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 334119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 335119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 336119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 337119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 338105197Ssam 339105197Ssam/* 340105197Ssam * set parameters into secpolicyindex buffer. 341105197Ssam * Must allocate secpolicyindex buffer passed to this function. 342105197Ssam */ 343105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 344105197Ssamdo { \ 345105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 346105197Ssam (idx)->dir = (_dir); \ 347105197Ssam (idx)->prefs = (ps); \ 348105197Ssam (idx)->prefd = (pd); \ 349105197Ssam (idx)->ul_proto = (ulp); \ 350105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 351105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 352105197Ssam} while (0) 353105197Ssam 354105197Ssam/* 355105197Ssam * set parameters into secasindex buffer. 356105197Ssam * Must allocate secasindex buffer before calling this function. 357105197Ssam */ 358105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 359105197Ssamdo { \ 360105197Ssam bzero((idx), sizeof(struct secasindex)); \ 361105197Ssam (idx)->proto = (p); \ 362105197Ssam (idx)->mode = (m); \ 363105197Ssam (idx)->reqid = (r); \ 364105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 365105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 366105197Ssam} while (0) 367105197Ssam 368105197Ssam/* key statistics */ 369105197Ssamstruct _keystat { 370105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 371105197Ssam} keystat; 372105197Ssam 373105197Ssamstruct sadb_msghdr { 374105197Ssam struct sadb_msg *msg; 375105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 376105197Ssam int extoff[SADB_EXT_MAX + 1]; 377105197Ssam int extlen[SADB_EXT_MAX + 1]; 378105197Ssam}; 379105197Ssam 380105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 381105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 382105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 383105197Ssamstatic void key_delsp __P((struct secpolicy *)); 384105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 385119643Ssamstatic void _key_delsp(struct secpolicy *sp); 386105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 387105197Ssamstatic u_int32_t key_newreqid __P((void)); 388105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 389105197Ssam const struct sadb_msghdr *, int, int, ...)); 390105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 391105197Ssam const struct sadb_msghdr *)); 392105197Ssamstatic u_int32_t key_getnewspid __P((void)); 393105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 394105197Ssam const struct sadb_msghdr *)); 395105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 396105197Ssam const struct sadb_msghdr *)); 397105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 398105197Ssam const struct sadb_msghdr *)); 399105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 400105197Ssam const struct sadb_msghdr *)); 401105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 402105197Ssam const struct sadb_msghdr *)); 403105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 404105197Ssam u_int8_t, u_int32_t, u_int32_t)); 405105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 406105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 407105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 408105197Ssamstatic void key_delsah __P((struct secashead *)); 409105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 410105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 411105197Ssam const char*, int)); 412105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 413105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 414105197Ssamstatic void key_delsav __P((struct secasvar *)); 415105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 416105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 417105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 418105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 419105197Ssam const struct sadb_msghdr *)); 420105197Ssamstatic int key_mature __P((struct secasvar *)); 421105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 422105197Ssam u_int8_t, u_int32_t, u_int32_t)); 423105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 424105197Ssam u_int32_t, pid_t, u_int16_t)); 425105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 426105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 427105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 428105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 429105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 430105197Ssam u_int32_t)); 431157123Sgnnstatic struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 432157123Sgnn struct malloc_type *); 433157123Sgnnstatic struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 434157123Sgnn struct malloc_type *type); 435105197Ssam#ifdef INET6 436105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 437105197Ssam#endif 438105197Ssam 439105197Ssam/* flags for key_cmpsaidx() */ 440105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 441105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 442105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 443105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 444105197Ssamstatic int key_cmpsaidx 445105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 446105197Ssam 447105197Ssamstatic int key_cmpspidx_exactly 448105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 449105197Ssamstatic int key_cmpspidx_withmask 450105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 451105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 452105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 453105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 454105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 455105197Ssam 456105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 457105197Ssam const struct sadb_msghdr *)); 458105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 459105197Ssam struct secasindex *)); 460105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 461105197Ssam const struct sadb_msghdr *)); 462105197Ssam#ifdef IPSEC_DOSEQCHECK 463105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 464105197Ssam#endif 465105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 466105197Ssam const struct sadb_msghdr *)); 467105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 468105197Ssam const struct sadb_msghdr *)); 469105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 470105197Ssam const struct sadb_msghdr *)); 471105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 472105197Ssam const struct sadb_msghdr *)); 473105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 474105197Ssam const struct sadb_msghdr *)); 475105197Ssam 476105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 477105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 478105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 479105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 480105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 481105197Ssam 482105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 483105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 484105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 485105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 486105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 487105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 488105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 489105197Ssam const struct sadb_msghdr *)); 490105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 491105197Ssam const struct sadb_msghdr *)); 492105197Ssamstatic int key_expire __P((struct secasvar *)); 493105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 494105197Ssam const struct sadb_msghdr *)); 495105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 496105197Ssam const struct sadb_msghdr *)); 497105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 498105197Ssam const struct sadb_msghdr *)); 499105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 500105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 501105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 502157123Sgnnstatic struct mbuf *key_setlifetime(struct seclifetime *src, 503157123Sgnn u_int16_t exttype); 504157123Sgnnstatic struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 505157123Sgnn 506105197Ssam#if 0 507105197Ssamstatic const char *key_getfqdn __P((void)); 508105197Ssamstatic const char *key_getuserfqdn __P((void)); 509105197Ssam#endif 510105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 511105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 512105197Ssam 513158767Spjdstatic __inline void 514158767Spjdsa_initref(struct secasvar *sav) 515158767Spjd{ 516105197Ssam 517158767Spjd refcount_init(&sav->refcnt, 1); 518158767Spjd} 519158767Spjdstatic __inline void 520158767Spjdsa_addref(struct secasvar *sav) 521158767Spjd{ 522158767Spjd 523158767Spjd refcount_acquire(&sav->refcnt); 524158767Spjd IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 525158767Spjd} 526158767Spjdstatic __inline int 527158767Spjdsa_delref(struct secasvar *sav) 528158767Spjd{ 529158767Spjd 530158767Spjd IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 531158767Spjd return (refcount_release(&sav->refcnt)); 532158767Spjd} 533158767Spjd 534105197Ssam#define SP_ADDREF(p) do { \ 535105197Ssam (p)->refcnt++; \ 536120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 537105197Ssam} while (0) 538105197Ssam#define SP_DELREF(p) do { \ 539120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 540105197Ssam (p)->refcnt--; \ 541105197Ssam} while (0) 542135947Ssam 543105197Ssam 544105197Ssam/* 545135947Ssam * Update the refcnt while holding the SPTREE lock. 546135947Ssam */ 547135947Ssamvoid 548135947Ssamkey_addref(struct secpolicy *sp) 549135947Ssam{ 550135947Ssam SPTREE_LOCK(); 551135947Ssam SP_ADDREF(sp); 552135947Ssam SPTREE_UNLOCK(); 553135947Ssam} 554135947Ssam 555135947Ssam/* 556105197Ssam * Return 0 when there are known to be no SP's for the specified 557105197Ssam * direction. Otherwise return 1. This is used by IPsec code 558105197Ssam * to optimize performance. 559105197Ssam */ 560105197Ssamint 561105197Ssamkey_havesp(u_int dir) 562105197Ssam{ 563183550Szec INIT_VNET_IPSEC(curvnet); 564183550Szec 565105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 566181803Sbz LIST_FIRST(&V_sptree[dir]) != NULL : 1); 567105197Ssam} 568105197Ssam 569105197Ssam/* %%% IPsec policy management */ 570105197Ssam/* 571105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 572105197Ssam * Must call key_freesp() later. 573105197Ssam * OUT: NULL: not found 574105197Ssam * others: found and return the pointer. 575105197Ssam */ 576105197Ssamstruct secpolicy * 577105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 578105197Ssam{ 579183550Szec INIT_VNET_IPSEC(curvnet); 580105197Ssam struct secpolicy *sp; 581105197Ssam 582120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 583120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 584120585Ssam ("invalid direction %u", dir)); 585105197Ssam 586105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 587120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 588105197Ssam 589105197Ssam /* get a SP entry */ 590105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 591105197Ssam printf("*** objects\n"); 592105197Ssam kdebug_secpolicyindex(spidx)); 593105197Ssam 594120585Ssam SPTREE_LOCK(); 595181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 596105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 597105197Ssam printf("*** in SPD\n"); 598105197Ssam kdebug_secpolicyindex(&sp->spidx)); 599105197Ssam 600105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 601105197Ssam continue; 602105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 603105197Ssam goto found; 604105197Ssam } 605105197Ssam sp = NULL; 606105197Ssamfound: 607105197Ssam if (sp) { 608105197Ssam /* sanity check */ 609120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 610105197Ssam 611105197Ssam /* found a SPD entry */ 612105197Ssam sp->lastused = time_second; 613105197Ssam SP_ADDREF(sp); 614105197Ssam } 615120585Ssam SPTREE_UNLOCK(); 616105197Ssam 617105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 618120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 619105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 620105197Ssam return sp; 621105197Ssam} 622105197Ssam 623105197Ssam/* 624105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 625105197Ssam * Must call key_freesp() later. 626105197Ssam * OUT: NULL: not found 627105197Ssam * others: found and return the pointer. 628105197Ssam */ 629105197Ssamstruct secpolicy * 630105197Ssamkey_allocsp2(u_int32_t spi, 631105197Ssam union sockaddr_union *dst, 632105197Ssam u_int8_t proto, 633105197Ssam u_int dir, 634105197Ssam const char* where, int tag) 635105197Ssam{ 636183550Szec INIT_VNET_IPSEC(curvnet); 637105197Ssam struct secpolicy *sp; 638105197Ssam 639120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 640120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 641120585Ssam ("invalid direction %u", dir)); 642105197Ssam 643105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 644120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 645105197Ssam 646105197Ssam /* get a SP entry */ 647105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 648105197Ssam printf("*** objects\n"); 649105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 650105197Ssam kdebug_sockaddr(&dst->sa)); 651105197Ssam 652120585Ssam SPTREE_LOCK(); 653181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 654105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 655105197Ssam printf("*** in SPD\n"); 656105197Ssam kdebug_secpolicyindex(&sp->spidx)); 657105197Ssam 658105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 659105197Ssam continue; 660105197Ssam /* compare simple values, then dst address */ 661105197Ssam if (sp->spidx.ul_proto != proto) 662105197Ssam continue; 663105197Ssam /* NB: spi's must exist and match */ 664105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 665105197Ssam continue; 666105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 667105197Ssam goto found; 668105197Ssam } 669105197Ssam sp = NULL; 670105197Ssamfound: 671105197Ssam if (sp) { 672105197Ssam /* sanity check */ 673120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 674105197Ssam 675105197Ssam /* found a SPD entry */ 676105197Ssam sp->lastused = time_second; 677105197Ssam SP_ADDREF(sp); 678105197Ssam } 679120585Ssam SPTREE_UNLOCK(); 680105197Ssam 681105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 682120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 683105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 684105197Ssam return sp; 685105197Ssam} 686105197Ssam 687191599Sbz#if 0 688105197Ssam/* 689105197Ssam * return a policy that matches this particular inbound packet. 690105197Ssam * XXX slow 691105197Ssam */ 692105197Ssamstruct secpolicy * 693105197Ssamkey_gettunnel(const struct sockaddr *osrc, 694105197Ssam const struct sockaddr *odst, 695105197Ssam const struct sockaddr *isrc, 696105197Ssam const struct sockaddr *idst, 697105197Ssam const char* where, int tag) 698105197Ssam{ 699183550Szec INIT_VNET_IPSEC(curvnet); 700105197Ssam struct secpolicy *sp; 701105197Ssam const int dir = IPSEC_DIR_INBOUND; 702105197Ssam struct ipsecrequest *r1, *r2, *p; 703105197Ssam struct secpolicyindex spidx; 704105197Ssam 705105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 706120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 707105197Ssam 708105197Ssam if (isrc->sa_family != idst->sa_family) { 709120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 710120585Ssam __func__, isrc->sa_family, idst->sa_family)); 711105197Ssam sp = NULL; 712105197Ssam goto done; 713105197Ssam } 714105197Ssam 715120585Ssam SPTREE_LOCK(); 716181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 717105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 718105197Ssam continue; 719105197Ssam 720105197Ssam r1 = r2 = NULL; 721105197Ssam for (p = sp->req; p; p = p->next) { 722105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 723105197Ssam continue; 724105197Ssam 725105197Ssam r1 = r2; 726105197Ssam r2 = p; 727105197Ssam 728105197Ssam if (!r1) { 729105197Ssam /* here we look at address matches only */ 730105197Ssam spidx = sp->spidx; 731105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 732105197Ssam idst->sa_len > sizeof(spidx.dst)) 733105197Ssam continue; 734105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 735105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 736105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 737105197Ssam continue; 738105197Ssam } else { 739105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 740105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 741105197Ssam continue; 742105197Ssam } 743105197Ssam 744105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 745105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 746105197Ssam continue; 747105197Ssam 748105197Ssam goto found; 749105197Ssam } 750105197Ssam } 751105197Ssam sp = NULL; 752105197Ssamfound: 753105197Ssam if (sp) { 754105197Ssam sp->lastused = time_second; 755105197Ssam SP_ADDREF(sp); 756105197Ssam } 757120585Ssam SPTREE_UNLOCK(); 758105197Ssamdone: 759105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 760120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 761105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 762105197Ssam return sp; 763105197Ssam} 764191599Sbz#endif 765105197Ssam 766105197Ssam/* 767105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 768105197Ssam * checking each request entries in SP, and acquire an SA if need. 769105197Ssam * OUT: 0: there are valid requests. 770105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 771105197Ssam */ 772105197Ssamint 773105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 774105197Ssam{ 775183550Szec INIT_VNET_IPSEC(curvnet); 776105197Ssam u_int level; 777105197Ssam int error; 778105197Ssam 779120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 780120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 781120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 782105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 783120585Ssam ("unexpected policy %u", saidx->mode)); 784105197Ssam 785105197Ssam /* 786105197Ssam * XXX guard against protocol callbacks from the crypto 787105197Ssam * thread as they reference ipsecrequest.sav which we 788105197Ssam * temporarily null out below. Need to rethink how we 789105197Ssam * handle bundled SA's in the callback thread. 790105197Ssam */ 791120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 792119643Ssam 793119643Ssam /* get current level */ 794119643Ssam level = ipsec_get_reqlevel(isr); 795105197Ssam#if 0 796105197Ssam /* 797105197Ssam * We do allocate new SA only if the state of SA in the holder is 798105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 799105197Ssam */ 800105197Ssam if (isr->sav != NULL) { 801105197Ssam if (isr->sav->sah == NULL) 802120585Ssam panic("%s: sah is null.\n", __func__); 803105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 804105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 805105197Ssam KEY_FREESAV(&isr->sav); 806105197Ssam isr->sav = NULL; 807105197Ssam } 808105197Ssam } 809105197Ssam#else 810105197Ssam /* 811105197Ssam * we free any SA stashed in the IPsec request because a different 812105197Ssam * SA may be involved each time this request is checked, either 813105197Ssam * because new SAs are being configured, or this request is 814105197Ssam * associated with an unconnected datagram socket, or this request 815105197Ssam * is associated with a system default policy. 816105197Ssam * 817105197Ssam * The operation may have negative impact to performance. We may 818105197Ssam * want to check cached SA carefully, rather than picking new SA 819105197Ssam * every time. 820105197Ssam */ 821105197Ssam if (isr->sav != NULL) { 822105197Ssam KEY_FREESAV(&isr->sav); 823105197Ssam isr->sav = NULL; 824105197Ssam } 825105197Ssam#endif 826105197Ssam 827105197Ssam /* 828105197Ssam * new SA allocation if no SA found. 829105197Ssam * key_allocsa_policy should allocate the oldest SA available. 830105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 831105197Ssam */ 832105197Ssam if (isr->sav == NULL) 833105197Ssam isr->sav = key_allocsa_policy(saidx); 834105197Ssam 835105197Ssam /* When there is SA. */ 836105197Ssam if (isr->sav != NULL) { 837105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 838105197Ssam isr->sav->state != SADB_SASTATE_DYING) 839105197Ssam return EINVAL; 840105197Ssam return 0; 841105197Ssam } 842105197Ssam 843105197Ssam /* there is no SA */ 844105197Ssam error = key_acquire(saidx, isr->sp); 845105197Ssam if (error != 0) { 846105197Ssam /* XXX What should I do ? */ 847120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 848120585Ssam __func__, error)); 849105197Ssam return error; 850105197Ssam } 851105197Ssam 852105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 853105197Ssam /* XXX sigh, the interface to this routine is botched */ 854120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 855105197Ssam return 0; 856105197Ssam } else { 857105197Ssam return ENOENT; 858105197Ssam } 859105197Ssam} 860105197Ssam 861105197Ssam/* 862105197Ssam * allocating a SA for policy entry from SAD. 863105197Ssam * NOTE: searching SAD of aliving state. 864105197Ssam * OUT: NULL: not found. 865105197Ssam * others: found and return the pointer. 866105197Ssam */ 867105197Ssamstatic struct secasvar * 868105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 869105197Ssam{ 870128856Ssam#define N(a) _ARRAYLEN(a) 871183550Szec INIT_VNET_IPSEC(curvnet); 872105197Ssam struct secashead *sah; 873105197Ssam struct secasvar *sav; 874128856Ssam u_int stateidx, arraysize; 875128856Ssam const u_int *state_valid; 876105197Ssam 877120585Ssam SAHTREE_LOCK(); 878181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 879105197Ssam if (sah->state == SADB_SASTATE_DEAD) 880105197Ssam continue; 881119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 882181803Sbz if (V_key_preferred_oldsa) { 883128856Ssam state_valid = saorder_state_valid_prefer_old; 884128856Ssam arraysize = N(saorder_state_valid_prefer_old); 885128856Ssam } else { 886128856Ssam state_valid = saorder_state_valid_prefer_new; 887128856Ssam arraysize = N(saorder_state_valid_prefer_new); 888128856Ssam } 889120585Ssam SAHTREE_UNLOCK(); 890105197Ssam goto found; 891119643Ssam } 892105197Ssam } 893120585Ssam SAHTREE_UNLOCK(); 894105197Ssam 895105197Ssam return NULL; 896105197Ssam 897105197Ssam found: 898105197Ssam /* search valid state */ 899128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 900128856Ssam sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 901105197Ssam if (sav != NULL) 902105197Ssam return sav; 903105197Ssam } 904105197Ssam 905105197Ssam return NULL; 906128856Ssam#undef N 907105197Ssam} 908105197Ssam 909105197Ssam/* 910105197Ssam * searching SAD with direction, protocol, mode and state. 911105197Ssam * called by key_allocsa_policy(). 912105197Ssam * OUT: 913105197Ssam * NULL : not found 914105197Ssam * others : found, pointer to a SA. 915105197Ssam */ 916105197Ssamstatic struct secasvar * 917105197Ssamkey_do_allocsa_policy(struct secashead *sah, u_int state) 918105197Ssam{ 919183550Szec INIT_VNET_IPSEC(curvnet); 920105197Ssam struct secasvar *sav, *nextsav, *candidate, *d; 921105197Ssam 922105197Ssam /* initilize */ 923105197Ssam candidate = NULL; 924105197Ssam 925120585Ssam SAHTREE_LOCK(); 926105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 927105197Ssam sav != NULL; 928105197Ssam sav = nextsav) { 929105197Ssam 930105197Ssam nextsav = LIST_NEXT(sav, chain); 931105197Ssam 932105197Ssam /* sanity check */ 933120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 934105197Ssam 935105197Ssam /* initialize */ 936105197Ssam if (candidate == NULL) { 937105197Ssam candidate = sav; 938105197Ssam continue; 939105197Ssam } 940105197Ssam 941105197Ssam /* Which SA is the better ? */ 942105197Ssam 943120585Ssam IPSEC_ASSERT(candidate->lft_c != NULL, 944120585Ssam ("null candidate lifetime")); 945120585Ssam IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 946105197Ssam 947105197Ssam /* What the best method is to compare ? */ 948181803Sbz if (V_key_preferred_oldsa) { 949157123Sgnn if (candidate->lft_c->addtime > 950157123Sgnn sav->lft_c->addtime) { 951105197Ssam candidate = sav; 952105197Ssam } 953105197Ssam continue; 954105197Ssam /*NOTREACHED*/ 955105197Ssam } 956105197Ssam 957125876Sguido /* preferred new sa rather than old sa */ 958157123Sgnn if (candidate->lft_c->addtime < 959157123Sgnn sav->lft_c->addtime) { 960105197Ssam d = candidate; 961105197Ssam candidate = sav; 962105197Ssam } else 963105197Ssam d = sav; 964105197Ssam 965105197Ssam /* 966105197Ssam * prepared to delete the SA when there is more 967105197Ssam * suitable candidate and the lifetime of the SA is not 968105197Ssam * permanent. 969105197Ssam */ 970177553Sbz if (d->lft_h->addtime != 0) { 971105197Ssam struct mbuf *m, *result; 972125508Ssam u_int8_t satype; 973105197Ssam 974105197Ssam key_sa_chgstate(d, SADB_SASTATE_DEAD); 975105197Ssam 976120585Ssam IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 977125508Ssam 978125508Ssam satype = key_proto2satype(d->sah->saidx.proto); 979125508Ssam if (satype == 0) 980125508Ssam goto msgfail; 981125508Ssam 982105197Ssam m = key_setsadbmsg(SADB_DELETE, 0, 983125508Ssam satype, 0, 0, d->refcnt - 1); 984105197Ssam if (!m) 985105197Ssam goto msgfail; 986105197Ssam result = m; 987105197Ssam 988105197Ssam /* set sadb_address for saidx's. */ 989105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 990105197Ssam &d->sah->saidx.src.sa, 991105197Ssam d->sah->saidx.src.sa.sa_len << 3, 992105197Ssam IPSEC_ULPROTO_ANY); 993105197Ssam if (!m) 994105197Ssam goto msgfail; 995105197Ssam m_cat(result, m); 996105197Ssam 997105197Ssam /* set sadb_address for saidx's. */ 998105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 999128860Ssam &d->sah->saidx.dst.sa, 1000128860Ssam d->sah->saidx.dst.sa.sa_len << 3, 1001105197Ssam IPSEC_ULPROTO_ANY); 1002105197Ssam if (!m) 1003105197Ssam goto msgfail; 1004105197Ssam m_cat(result, m); 1005105197Ssam 1006105197Ssam /* create SA extension */ 1007105197Ssam m = key_setsadbsa(d); 1008105197Ssam if (!m) 1009105197Ssam goto msgfail; 1010105197Ssam m_cat(result, m); 1011105197Ssam 1012105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 1013105197Ssam result = m_pullup(result, 1014105197Ssam sizeof(struct sadb_msg)); 1015105197Ssam if (result == NULL) 1016105197Ssam goto msgfail; 1017105197Ssam } 1018105197Ssam 1019105197Ssam result->m_pkthdr.len = 0; 1020105197Ssam for (m = result; m; m = m->m_next) 1021105197Ssam result->m_pkthdr.len += m->m_len; 1022105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 1023105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 1024105197Ssam 1025105197Ssam if (key_sendup_mbuf(NULL, result, 1026105197Ssam KEY_SENDUP_REGISTERED)) 1027105197Ssam goto msgfail; 1028105197Ssam msgfail: 1029105197Ssam KEY_FREESAV(&d); 1030105197Ssam } 1031105197Ssam } 1032105197Ssam if (candidate) { 1033158767Spjd sa_addref(candidate); 1034105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1035120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 1036120585Ssam __func__, candidate->refcnt, candidate)); 1037105197Ssam } 1038120585Ssam SAHTREE_UNLOCK(); 1039119643Ssam 1040105197Ssam return candidate; 1041105197Ssam} 1042105197Ssam 1043105197Ssam/* 1044105197Ssam * allocating a usable SA entry for a *INBOUND* packet. 1045105197Ssam * Must call key_freesav() later. 1046105197Ssam * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1047105197Ssam * NULL: not found, or error occured. 1048105197Ssam * 1049105197Ssam * In the comparison, no source address is used--for RFC2401 conformance. 1050105197Ssam * To quote, from section 4.1: 1051105197Ssam * A security association is uniquely identified by a triple consisting 1052105197Ssam * of a Security Parameter Index (SPI), an IP Destination Address, and a 1053105197Ssam * security protocol (AH or ESP) identifier. 1054105197Ssam * Note that, however, we do need to keep source address in IPsec SA. 1055105197Ssam * IKE specification and PF_KEY specification do assume that we 1056105197Ssam * keep source address in IPsec SA. We see a tricky situation here. 1057105197Ssam */ 1058105197Ssamstruct secasvar * 1059105197Ssamkey_allocsa( 1060105197Ssam union sockaddr_union *dst, 1061105197Ssam u_int proto, 1062105197Ssam u_int32_t spi, 1063105197Ssam const char* where, int tag) 1064105197Ssam{ 1065183550Szec INIT_VNET_IPSEC(curvnet); 1066105197Ssam struct secashead *sah; 1067105197Ssam struct secasvar *sav; 1068128856Ssam u_int stateidx, arraysize, state; 1069128856Ssam const u_int *saorder_state_valid; 1070105197Ssam 1071120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst address")); 1072105197Ssam 1073105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1074120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 1075105197Ssam 1076105197Ssam /* 1077105197Ssam * searching SAD. 1078105197Ssam * XXX: to be checked internal IP header somewhere. Also when 1079105197Ssam * IPsec tunnel packet is received. But ESP tunnel mode is 1080105197Ssam * encrypted so we can't check internal IP header. 1081105197Ssam */ 1082120585Ssam SAHTREE_LOCK(); 1083181803Sbz if (V_key_preferred_oldsa) { 1084128856Ssam saorder_state_valid = saorder_state_valid_prefer_old; 1085128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1086128856Ssam } else { 1087128856Ssam saorder_state_valid = saorder_state_valid_prefer_new; 1088128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1089128856Ssam } 1090181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 1091105197Ssam /* search valid state */ 1092128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 1093105197Ssam state = saorder_state_valid[stateidx]; 1094105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 1095105197Ssam /* sanity check */ 1096120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 1097105197Ssam /* do not return entries w/ unusable state */ 1098105197Ssam if (sav->state != SADB_SASTATE_MATURE && 1099105197Ssam sav->state != SADB_SASTATE_DYING) 1100105197Ssam continue; 1101105197Ssam if (proto != sav->sah->saidx.proto) 1102105197Ssam continue; 1103105197Ssam if (spi != sav->spi) 1104105197Ssam continue; 1105105197Ssam#if 0 /* don't check src */ 1106105197Ssam /* check src address */ 1107105197Ssam if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1108105197Ssam continue; 1109105197Ssam#endif 1110105197Ssam /* check dst address */ 1111105197Ssam if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0) 1112105197Ssam continue; 1113158767Spjd sa_addref(sav); 1114105197Ssam goto done; 1115105197Ssam } 1116105197Ssam } 1117105197Ssam } 1118105197Ssam sav = NULL; 1119105197Ssamdone: 1120120585Ssam SAHTREE_UNLOCK(); 1121105197Ssam 1122105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1123120585Ssam printf("DP %s return SA:%p; refcnt %u\n", __func__, 1124105197Ssam sav, sav ? sav->refcnt : 0)); 1125105197Ssam return sav; 1126105197Ssam} 1127105197Ssam 1128105197Ssam/* 1129105197Ssam * Must be called after calling key_allocsp(). 1130105197Ssam * For both the packet without socket and key_freeso(). 1131105197Ssam */ 1132105197Ssamvoid 1133105197Ssam_key_freesp(struct secpolicy **spp, const char* where, int tag) 1134105197Ssam{ 1135183550Szec INIT_VNET_IPSEC(curvnet); 1136105197Ssam struct secpolicy *sp = *spp; 1137105197Ssam 1138120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1139105197Ssam 1140120585Ssam SPTREE_LOCK(); 1141105197Ssam SP_DELREF(sp); 1142105197Ssam 1143105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1144120585Ssam printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1145120585Ssam __func__, sp, sp->id, where, tag, sp->refcnt)); 1146105197Ssam 1147105197Ssam if (sp->refcnt == 0) { 1148105197Ssam *spp = NULL; 1149105197Ssam key_delsp(sp); 1150105197Ssam } 1151120585Ssam SPTREE_UNLOCK(); 1152105197Ssam} 1153105197Ssam 1154105197Ssam/* 1155105197Ssam * Must be called after calling key_allocsp(). 1156105197Ssam * For the packet with socket. 1157105197Ssam */ 1158105197Ssamvoid 1159105197Ssamkey_freeso(struct socket *so) 1160105197Ssam{ 1161183550Szec INIT_VNET_IPSEC(curvnet); 1162120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1163105197Ssam 1164105197Ssam switch (so->so_proto->pr_domain->dom_family) { 1165186141Sbz#if defined(INET) || defined(INET6) 1166105197Ssam#ifdef INET 1167105197Ssam case PF_INET: 1168105197Ssam#endif 1169105197Ssam#ifdef INET6 1170105197Ssam case PF_INET6: 1171186141Sbz#endif 1172105197Ssam { 1173186141Sbz struct inpcb *pcb = sotoinpcb(so); 1174105197Ssam 1175105197Ssam /* Does it have a PCB ? */ 1176105197Ssam if (pcb == NULL) 1177105197Ssam return; 1178105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1179105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1180105197Ssam } 1181105197Ssam break; 1182186141Sbz#endif /* INET || INET6 */ 1183105197Ssam default: 1184120585Ssam ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1185120585Ssam __func__, so->so_proto->pr_domain->dom_family)); 1186105197Ssam return; 1187105197Ssam } 1188105197Ssam} 1189105197Ssam 1190105197Ssamstatic void 1191105197Ssamkey_freesp_so(struct secpolicy **sp) 1192105197Ssam{ 1193120585Ssam IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1194105197Ssam 1195105197Ssam if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1196105197Ssam (*sp)->policy == IPSEC_POLICY_BYPASS) 1197105197Ssam return; 1198105197Ssam 1199120585Ssam IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1200120585Ssam ("invalid policy %u", (*sp)->policy)); 1201105197Ssam KEY_FREESP(sp); 1202105197Ssam} 1203105197Ssam 1204105197Ssam/* 1205105197Ssam * Must be called after calling key_allocsa(). 1206105197Ssam * This function is called by key_freesp() to free some SA allocated 1207105197Ssam * for a policy. 1208105197Ssam */ 1209105197Ssamvoid 1210105197Ssamkey_freesav(struct secasvar **psav, const char* where, int tag) 1211105197Ssam{ 1212183550Szec INIT_VNET_IPSEC(curvnet); 1213105197Ssam struct secasvar *sav = *psav; 1214105197Ssam 1215120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 1216105197Ssam 1217158767Spjd if (sa_delref(sav)) { 1218158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1219158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1220158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1221105197Ssam *psav = NULL; 1222105197Ssam key_delsav(sav); 1223158767Spjd } else { 1224158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1225158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1226158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1227105197Ssam } 1228105197Ssam} 1229105197Ssam 1230105197Ssam/* %%% SPD management */ 1231105197Ssam/* 1232105197Ssam * free security policy entry. 1233105197Ssam */ 1234105197Ssamstatic void 1235105197Ssamkey_delsp(struct secpolicy *sp) 1236105197Ssam{ 1237119643Ssam struct ipsecrequest *isr, *nextisr; 1238105197Ssam 1239120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1240120585Ssam SPTREE_LOCK_ASSERT(); 1241105197Ssam 1242105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 1243105197Ssam 1244120585Ssam IPSEC_ASSERT(sp->refcnt == 0, 1245120585Ssam ("SP with references deleted (refcnt %u)", sp->refcnt)); 1246105197Ssam 1247105197Ssam /* remove from SP index */ 1248105197Ssam if (__LIST_CHAINED(sp)) 1249105197Ssam LIST_REMOVE(sp, chain); 1250105197Ssam 1251119643Ssam for (isr = sp->req; isr != NULL; isr = nextisr) { 1252105197Ssam if (isr->sav != NULL) { 1253105197Ssam KEY_FREESAV(&isr->sav); 1254105197Ssam isr->sav = NULL; 1255105197Ssam } 1256105197Ssam 1257105197Ssam nextisr = isr->next; 1258119643Ssam ipsec_delisr(isr); 1259105197Ssam } 1260119643Ssam _key_delsp(sp); 1261105197Ssam} 1262105197Ssam 1263105197Ssam/* 1264105197Ssam * search SPD 1265105197Ssam * OUT: NULL : not found 1266105197Ssam * others : found, pointer to a SP. 1267105197Ssam */ 1268105197Ssamstatic struct secpolicy * 1269105197Ssamkey_getsp(struct secpolicyindex *spidx) 1270105197Ssam{ 1271183550Szec INIT_VNET_IPSEC(curvnet); 1272105197Ssam struct secpolicy *sp; 1273105197Ssam 1274120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1275105197Ssam 1276120585Ssam SPTREE_LOCK(); 1277181803Sbz LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1278105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1279105197Ssam continue; 1280105197Ssam if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1281105197Ssam SP_ADDREF(sp); 1282119643Ssam break; 1283105197Ssam } 1284105197Ssam } 1285120585Ssam SPTREE_UNLOCK(); 1286105197Ssam 1287119643Ssam return sp; 1288105197Ssam} 1289105197Ssam 1290105197Ssam/* 1291105197Ssam * get SP by index. 1292105197Ssam * OUT: NULL : not found 1293105197Ssam * others : found, pointer to a SP. 1294105197Ssam */ 1295105197Ssamstatic struct secpolicy * 1296105197Ssamkey_getspbyid(u_int32_t id) 1297105197Ssam{ 1298183550Szec INIT_VNET_IPSEC(curvnet); 1299105197Ssam struct secpolicy *sp; 1300105197Ssam 1301120585Ssam SPTREE_LOCK(); 1302181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1303105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1304105197Ssam continue; 1305105197Ssam if (sp->id == id) { 1306105197Ssam SP_ADDREF(sp); 1307119643Ssam goto done; 1308105197Ssam } 1309105197Ssam } 1310105197Ssam 1311181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1312105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1313105197Ssam continue; 1314105197Ssam if (sp->id == id) { 1315105197Ssam SP_ADDREF(sp); 1316119643Ssam goto done; 1317105197Ssam } 1318105197Ssam } 1319119643Ssamdone: 1320120585Ssam SPTREE_UNLOCK(); 1321105197Ssam 1322119643Ssam return sp; 1323105197Ssam} 1324105197Ssam 1325105197Ssamstruct secpolicy * 1326105197Ssamkey_newsp(const char* where, int tag) 1327105197Ssam{ 1328183550Szec INIT_VNET_IPSEC(curvnet); 1329105197Ssam struct secpolicy *newsp = NULL; 1330105197Ssam 1331105197Ssam newsp = (struct secpolicy *) 1332119643Ssam malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1333105197Ssam if (newsp) { 1334120585Ssam SECPOLICY_LOCK_INIT(newsp); 1335105197Ssam newsp->refcnt = 1; 1336105197Ssam newsp->req = NULL; 1337105197Ssam } 1338105197Ssam 1339105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1340120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 1341105197Ssam where, tag, newsp)); 1342105197Ssam return newsp; 1343105197Ssam} 1344105197Ssam 1345119643Ssamstatic void 1346119643Ssam_key_delsp(struct secpolicy *sp) 1347119643Ssam{ 1348120585Ssam SECPOLICY_LOCK_DESTROY(sp); 1349119643Ssam free(sp, M_IPSEC_SP); 1350119643Ssam} 1351119643Ssam 1352105197Ssam/* 1353105197Ssam * create secpolicy structure from sadb_x_policy structure. 1354105197Ssam * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1355105197Ssam * so must be set properly later. 1356105197Ssam */ 1357105197Ssamstruct secpolicy * 1358105197Ssamkey_msg2sp(xpl0, len, error) 1359105197Ssam struct sadb_x_policy *xpl0; 1360105197Ssam size_t len; 1361105197Ssam int *error; 1362105197Ssam{ 1363183550Szec INIT_VNET_IPSEC(curvnet); 1364105197Ssam struct secpolicy *newsp; 1365105197Ssam 1366120585Ssam IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1367127972Spjd IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1368120585Ssam 1369105197Ssam if (len != PFKEY_EXTLEN(xpl0)) { 1370120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1371105197Ssam *error = EINVAL; 1372105197Ssam return NULL; 1373105197Ssam } 1374105197Ssam 1375105197Ssam if ((newsp = KEY_NEWSP()) == NULL) { 1376105197Ssam *error = ENOBUFS; 1377105197Ssam return NULL; 1378105197Ssam } 1379105197Ssam 1380105197Ssam newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1381105197Ssam newsp->policy = xpl0->sadb_x_policy_type; 1382105197Ssam 1383105197Ssam /* check policy */ 1384105197Ssam switch (xpl0->sadb_x_policy_type) { 1385105197Ssam case IPSEC_POLICY_DISCARD: 1386105197Ssam case IPSEC_POLICY_NONE: 1387105197Ssam case IPSEC_POLICY_ENTRUST: 1388105197Ssam case IPSEC_POLICY_BYPASS: 1389105197Ssam newsp->req = NULL; 1390105197Ssam break; 1391105197Ssam 1392105197Ssam case IPSEC_POLICY_IPSEC: 1393105197Ssam { 1394105197Ssam int tlen; 1395105197Ssam struct sadb_x_ipsecrequest *xisr; 1396105197Ssam struct ipsecrequest **p_isr = &newsp->req; 1397105197Ssam 1398105197Ssam /* validity check */ 1399105197Ssam if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1400120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1401120585Ssam __func__)); 1402105197Ssam KEY_FREESP(&newsp); 1403105197Ssam *error = EINVAL; 1404105197Ssam return NULL; 1405105197Ssam } 1406105197Ssam 1407105197Ssam tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1408105197Ssam xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1409105197Ssam 1410105197Ssam while (tlen > 0) { 1411105197Ssam /* length check */ 1412105197Ssam if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1413120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1414120585Ssam "length.\n", __func__)); 1415105197Ssam KEY_FREESP(&newsp); 1416105197Ssam *error = EINVAL; 1417105197Ssam return NULL; 1418105197Ssam } 1419105197Ssam 1420105197Ssam /* allocate request buffer */ 1421119643Ssam /* NB: data structure is zero'd */ 1422119643Ssam *p_isr = ipsec_newisr(); 1423105197Ssam if ((*p_isr) == NULL) { 1424105197Ssam ipseclog((LOG_DEBUG, 1425120585Ssam "%s: No more memory.\n", __func__)); 1426105197Ssam KEY_FREESP(&newsp); 1427105197Ssam *error = ENOBUFS; 1428105197Ssam return NULL; 1429105197Ssam } 1430105197Ssam 1431105197Ssam /* set values */ 1432105197Ssam switch (xisr->sadb_x_ipsecrequest_proto) { 1433105197Ssam case IPPROTO_ESP: 1434105197Ssam case IPPROTO_AH: 1435105197Ssam case IPPROTO_IPCOMP: 1436105197Ssam break; 1437105197Ssam default: 1438105197Ssam ipseclog((LOG_DEBUG, 1439120585Ssam "%s: invalid proto type=%u\n", __func__, 1440105197Ssam xisr->sadb_x_ipsecrequest_proto)); 1441105197Ssam KEY_FREESP(&newsp); 1442105197Ssam *error = EPROTONOSUPPORT; 1443105197Ssam return NULL; 1444105197Ssam } 1445105197Ssam (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1446105197Ssam 1447105197Ssam switch (xisr->sadb_x_ipsecrequest_mode) { 1448105197Ssam case IPSEC_MODE_TRANSPORT: 1449105197Ssam case IPSEC_MODE_TUNNEL: 1450105197Ssam break; 1451105197Ssam case IPSEC_MODE_ANY: 1452105197Ssam default: 1453105197Ssam ipseclog((LOG_DEBUG, 1454120585Ssam "%s: invalid mode=%u\n", __func__, 1455105197Ssam xisr->sadb_x_ipsecrequest_mode)); 1456105197Ssam KEY_FREESP(&newsp); 1457105197Ssam *error = EINVAL; 1458105197Ssam return NULL; 1459105197Ssam } 1460105197Ssam (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1461105197Ssam 1462105197Ssam switch (xisr->sadb_x_ipsecrequest_level) { 1463105197Ssam case IPSEC_LEVEL_DEFAULT: 1464105197Ssam case IPSEC_LEVEL_USE: 1465105197Ssam case IPSEC_LEVEL_REQUIRE: 1466105197Ssam break; 1467105197Ssam case IPSEC_LEVEL_UNIQUE: 1468105197Ssam /* validity check */ 1469105197Ssam /* 1470105197Ssam * If range violation of reqid, kernel will 1471105197Ssam * update it, don't refuse it. 1472105197Ssam */ 1473105197Ssam if (xisr->sadb_x_ipsecrequest_reqid 1474105197Ssam > IPSEC_MANUAL_REQID_MAX) { 1475105197Ssam ipseclog((LOG_DEBUG, 1476120585Ssam "%s: reqid=%d range " 1477105197Ssam "violation, updated by kernel.\n", 1478120585Ssam __func__, 1479105197Ssam xisr->sadb_x_ipsecrequest_reqid)); 1480105197Ssam xisr->sadb_x_ipsecrequest_reqid = 0; 1481105197Ssam } 1482105197Ssam 1483105197Ssam /* allocate new reqid id if reqid is zero. */ 1484105197Ssam if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1485105197Ssam u_int32_t reqid; 1486105197Ssam if ((reqid = key_newreqid()) == 0) { 1487105197Ssam KEY_FREESP(&newsp); 1488105197Ssam *error = ENOBUFS; 1489105197Ssam return NULL; 1490105197Ssam } 1491105197Ssam (*p_isr)->saidx.reqid = reqid; 1492105197Ssam xisr->sadb_x_ipsecrequest_reqid = reqid; 1493105197Ssam } else { 1494105197Ssam /* set it for manual keying. */ 1495105197Ssam (*p_isr)->saidx.reqid = 1496105197Ssam xisr->sadb_x_ipsecrequest_reqid; 1497105197Ssam } 1498105197Ssam break; 1499105197Ssam 1500105197Ssam default: 1501120585Ssam ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1502120585Ssam __func__, 1503105197Ssam xisr->sadb_x_ipsecrequest_level)); 1504105197Ssam KEY_FREESP(&newsp); 1505105197Ssam *error = EINVAL; 1506105197Ssam return NULL; 1507105197Ssam } 1508105197Ssam (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1509105197Ssam 1510105197Ssam /* set IP addresses if there */ 1511105197Ssam if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1512105197Ssam struct sockaddr *paddr; 1513105197Ssam 1514105197Ssam paddr = (struct sockaddr *)(xisr + 1); 1515105197Ssam 1516105197Ssam /* validity check */ 1517105197Ssam if (paddr->sa_len 1518105197Ssam > sizeof((*p_isr)->saidx.src)) { 1519120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1520120585Ssam "request address length.\n", 1521120585Ssam __func__)); 1522105197Ssam KEY_FREESP(&newsp); 1523105197Ssam *error = EINVAL; 1524105197Ssam return NULL; 1525105197Ssam } 1526105197Ssam bcopy(paddr, &(*p_isr)->saidx.src, 1527105197Ssam paddr->sa_len); 1528105197Ssam 1529105197Ssam paddr = (struct sockaddr *)((caddr_t)paddr 1530105197Ssam + paddr->sa_len); 1531105197Ssam 1532105197Ssam /* validity check */ 1533105197Ssam if (paddr->sa_len 1534105197Ssam > sizeof((*p_isr)->saidx.dst)) { 1535120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1536120585Ssam "request address length.\n", 1537120585Ssam __func__)); 1538105197Ssam KEY_FREESP(&newsp); 1539105197Ssam *error = EINVAL; 1540105197Ssam return NULL; 1541105197Ssam } 1542105197Ssam bcopy(paddr, &(*p_isr)->saidx.dst, 1543105197Ssam paddr->sa_len); 1544105197Ssam } 1545105197Ssam 1546105197Ssam (*p_isr)->sp = newsp; 1547105197Ssam 1548105197Ssam /* initialization for the next. */ 1549105197Ssam p_isr = &(*p_isr)->next; 1550105197Ssam tlen -= xisr->sadb_x_ipsecrequest_len; 1551105197Ssam 1552105197Ssam /* validity check */ 1553105197Ssam if (tlen < 0) { 1554120585Ssam ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1555120585Ssam __func__)); 1556105197Ssam KEY_FREESP(&newsp); 1557105197Ssam *error = EINVAL; 1558105197Ssam return NULL; 1559105197Ssam } 1560105197Ssam 1561105197Ssam xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1562105197Ssam + xisr->sadb_x_ipsecrequest_len); 1563105197Ssam } 1564105197Ssam } 1565105197Ssam break; 1566105197Ssam default: 1567120585Ssam ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1568105197Ssam KEY_FREESP(&newsp); 1569105197Ssam *error = EINVAL; 1570105197Ssam return NULL; 1571105197Ssam } 1572105197Ssam 1573105197Ssam *error = 0; 1574105197Ssam return newsp; 1575105197Ssam} 1576105197Ssam 1577105197Ssamstatic u_int32_t 1578105197Ssamkey_newreqid() 1579105197Ssam{ 1580105197Ssam static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1581105197Ssam 1582105197Ssam auto_reqid = (auto_reqid == ~0 1583105197Ssam ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1584105197Ssam 1585105197Ssam /* XXX should be unique check */ 1586105197Ssam 1587105197Ssam return auto_reqid; 1588105197Ssam} 1589105197Ssam 1590105197Ssam/* 1591105197Ssam * copy secpolicy struct to sadb_x_policy structure indicated. 1592105197Ssam */ 1593105197Ssamstruct mbuf * 1594105197Ssamkey_sp2msg(sp) 1595105197Ssam struct secpolicy *sp; 1596105197Ssam{ 1597105197Ssam struct sadb_x_policy *xpl; 1598105197Ssam int tlen; 1599105197Ssam caddr_t p; 1600105197Ssam struct mbuf *m; 1601105197Ssam 1602120585Ssam IPSEC_ASSERT(sp != NULL, ("null policy")); 1603105197Ssam 1604105197Ssam tlen = key_getspreqmsglen(sp); 1605105197Ssam 1606105197Ssam m = key_alloc_mbuf(tlen); 1607105197Ssam if (!m || m->m_next) { /*XXX*/ 1608105197Ssam if (m) 1609105197Ssam m_freem(m); 1610105197Ssam return NULL; 1611105197Ssam } 1612105197Ssam 1613105197Ssam m->m_len = tlen; 1614105197Ssam m->m_next = NULL; 1615105197Ssam xpl = mtod(m, struct sadb_x_policy *); 1616105197Ssam bzero(xpl, tlen); 1617105197Ssam 1618105197Ssam xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1619105197Ssam xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1620105197Ssam xpl->sadb_x_policy_type = sp->policy; 1621105197Ssam xpl->sadb_x_policy_dir = sp->spidx.dir; 1622105197Ssam xpl->sadb_x_policy_id = sp->id; 1623105197Ssam p = (caddr_t)xpl + sizeof(*xpl); 1624105197Ssam 1625105197Ssam /* if is the policy for ipsec ? */ 1626105197Ssam if (sp->policy == IPSEC_POLICY_IPSEC) { 1627105197Ssam struct sadb_x_ipsecrequest *xisr; 1628105197Ssam struct ipsecrequest *isr; 1629105197Ssam 1630105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 1631105197Ssam 1632105197Ssam xisr = (struct sadb_x_ipsecrequest *)p; 1633105197Ssam 1634105197Ssam xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1635105197Ssam xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1636105197Ssam xisr->sadb_x_ipsecrequest_level = isr->level; 1637105197Ssam xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1638105197Ssam 1639105197Ssam p += sizeof(*xisr); 1640105197Ssam bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1641105197Ssam p += isr->saidx.src.sa.sa_len; 1642105197Ssam bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1643105197Ssam p += isr->saidx.src.sa.sa_len; 1644105197Ssam 1645105197Ssam xisr->sadb_x_ipsecrequest_len = 1646105197Ssam PFKEY_ALIGN8(sizeof(*xisr) 1647105197Ssam + isr->saidx.src.sa.sa_len 1648105197Ssam + isr->saidx.dst.sa.sa_len); 1649105197Ssam } 1650105197Ssam } 1651105197Ssam 1652105197Ssam return m; 1653105197Ssam} 1654105197Ssam 1655105197Ssam/* m will not be freed nor modified */ 1656105197Ssamstatic struct mbuf * 1657105197Ssam#ifdef __STDC__ 1658105197Ssamkey_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1659105197Ssam int ndeep, int nitem, ...) 1660105197Ssam#else 1661105197Ssamkey_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1662105197Ssam struct mbuf *m; 1663105197Ssam const struct sadb_msghdr *mhp; 1664105197Ssam int ndeep; 1665105197Ssam int nitem; 1666105197Ssam va_dcl 1667105197Ssam#endif 1668105197Ssam{ 1669105197Ssam va_list ap; 1670105197Ssam int idx; 1671105197Ssam int i; 1672105197Ssam struct mbuf *result = NULL, *n; 1673105197Ssam int len; 1674105197Ssam 1675120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1676120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1677105197Ssam 1678105197Ssam va_start(ap, nitem); 1679105197Ssam for (i = 0; i < nitem; i++) { 1680105197Ssam idx = va_arg(ap, int); 1681105197Ssam if (idx < 0 || idx > SADB_EXT_MAX) 1682105197Ssam goto fail; 1683105197Ssam /* don't attempt to pull empty extension */ 1684105197Ssam if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1685105197Ssam continue; 1686105197Ssam if (idx != SADB_EXT_RESERVED && 1687105197Ssam (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1688105197Ssam continue; 1689105197Ssam 1690105197Ssam if (idx == SADB_EXT_RESERVED) { 1691105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1692120585Ssam 1693120585Ssam IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1694120585Ssam 1695111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 1696105197Ssam if (!n) 1697105197Ssam goto fail; 1698105197Ssam n->m_len = len; 1699105197Ssam n->m_next = NULL; 1700105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), 1701105197Ssam mtod(n, caddr_t)); 1702105197Ssam } else if (i < ndeep) { 1703105197Ssam len = mhp->extlen[idx]; 1704105197Ssam n = key_alloc_mbuf(len); 1705105197Ssam if (!n || n->m_next) { /*XXX*/ 1706105197Ssam if (n) 1707105197Ssam m_freem(n); 1708105197Ssam goto fail; 1709105197Ssam } 1710105197Ssam m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1711105197Ssam mtod(n, caddr_t)); 1712105197Ssam } else { 1713105197Ssam n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1714111119Simp M_DONTWAIT); 1715105197Ssam } 1716105197Ssam if (n == NULL) 1717105197Ssam goto fail; 1718105197Ssam 1719105197Ssam if (result) 1720105197Ssam m_cat(result, n); 1721105197Ssam else 1722105197Ssam result = n; 1723105197Ssam } 1724105197Ssam va_end(ap); 1725105197Ssam 1726105197Ssam if ((result->m_flags & M_PKTHDR) != 0) { 1727105197Ssam result->m_pkthdr.len = 0; 1728105197Ssam for (n = result; n; n = n->m_next) 1729105197Ssam result->m_pkthdr.len += n->m_len; 1730105197Ssam } 1731105197Ssam 1732105197Ssam return result; 1733105197Ssam 1734105197Ssamfail: 1735105197Ssam m_freem(result); 1736105197Ssam return NULL; 1737105197Ssam} 1738105197Ssam 1739105197Ssam/* 1740105197Ssam * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1741108533Sschweikh * add an entry to SP database, when received 1742105197Ssam * <base, address(SD), (lifetime(H),) policy> 1743105197Ssam * from the user(?). 1744105197Ssam * Adding to SP database, 1745105197Ssam * and send 1746105197Ssam * <base, address(SD), (lifetime(H),) policy> 1747105197Ssam * to the socket which was send. 1748105197Ssam * 1749105197Ssam * SPDADD set a unique policy entry. 1750105197Ssam * SPDSETIDX like SPDADD without a part of policy requests. 1751105197Ssam * SPDUPDATE replace a unique policy entry. 1752105197Ssam * 1753105197Ssam * m will always be freed. 1754105197Ssam */ 1755105197Ssamstatic int 1756105197Ssamkey_spdadd(so, m, mhp) 1757105197Ssam struct socket *so; 1758105197Ssam struct mbuf *m; 1759105197Ssam const struct sadb_msghdr *mhp; 1760105197Ssam{ 1761183550Szec INIT_VNET_IPSEC(curvnet); 1762105197Ssam struct sadb_address *src0, *dst0; 1763105197Ssam struct sadb_x_policy *xpl0, *xpl; 1764105197Ssam struct sadb_lifetime *lft = NULL; 1765105197Ssam struct secpolicyindex spidx; 1766105197Ssam struct secpolicy *newsp; 1767105197Ssam int error; 1768105197Ssam 1769120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 1770120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1771120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1772120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1773105197Ssam 1774105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1775105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1776105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1777105197Ssam ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1778105197Ssam return key_senderror(so, m, EINVAL); 1779105197Ssam } 1780105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1781105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1782105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1783120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1784120585Ssam __func__)); 1785105197Ssam return key_senderror(so, m, EINVAL); 1786105197Ssam } 1787105197Ssam if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1788105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1789105197Ssam < sizeof(struct sadb_lifetime)) { 1790120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1791120585Ssam __func__)); 1792105197Ssam return key_senderror(so, m, EINVAL); 1793105197Ssam } 1794105197Ssam lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1795105197Ssam } 1796105197Ssam 1797105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1798105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1799105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1800105197Ssam 1801105197Ssam /* make secindex */ 1802105197Ssam /* XXX boundary check against sa_len */ 1803105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1804105197Ssam src0 + 1, 1805105197Ssam dst0 + 1, 1806105197Ssam src0->sadb_address_prefixlen, 1807105197Ssam dst0->sadb_address_prefixlen, 1808105197Ssam src0->sadb_address_proto, 1809105197Ssam &spidx); 1810105197Ssam 1811105197Ssam /* checking the direciton. */ 1812105197Ssam switch (xpl0->sadb_x_policy_dir) { 1813105197Ssam case IPSEC_DIR_INBOUND: 1814105197Ssam case IPSEC_DIR_OUTBOUND: 1815105197Ssam break; 1816105197Ssam default: 1817120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1818105197Ssam mhp->msg->sadb_msg_errno = EINVAL; 1819105197Ssam return 0; 1820105197Ssam } 1821105197Ssam 1822105197Ssam /* check policy */ 1823105197Ssam /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1824105197Ssam if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1825105197Ssam || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1826120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1827105197Ssam return key_senderror(so, m, EINVAL); 1828105197Ssam } 1829105197Ssam 1830105197Ssam /* policy requests are mandatory when action is ipsec. */ 1831105197Ssam if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1832105197Ssam && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1833105197Ssam && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1834120585Ssam ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1835120585Ssam __func__)); 1836105197Ssam return key_senderror(so, m, EINVAL); 1837105197Ssam } 1838105197Ssam 1839105197Ssam /* 1840105197Ssam * checking there is SP already or not. 1841105197Ssam * SPDUPDATE doesn't depend on whether there is a SP or not. 1842105197Ssam * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1843105197Ssam * then error. 1844105197Ssam */ 1845105197Ssam newsp = key_getsp(&spidx); 1846105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1847105197Ssam if (newsp) { 1848105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1849105197Ssam KEY_FREESP(&newsp); 1850105197Ssam } 1851105197Ssam } else { 1852105197Ssam if (newsp != NULL) { 1853105197Ssam KEY_FREESP(&newsp); 1854120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1855120585Ssam __func__)); 1856105197Ssam return key_senderror(so, m, EEXIST); 1857105197Ssam } 1858105197Ssam } 1859105197Ssam 1860105197Ssam /* allocation new SP entry */ 1861105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1862105197Ssam return key_senderror(so, m, error); 1863105197Ssam } 1864105197Ssam 1865105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1866119643Ssam _key_delsp(newsp); 1867105197Ssam return key_senderror(so, m, ENOBUFS); 1868105197Ssam } 1869105197Ssam 1870105197Ssam /* XXX boundary check against sa_len */ 1871105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1872105197Ssam src0 + 1, 1873105197Ssam dst0 + 1, 1874105197Ssam src0->sadb_address_prefixlen, 1875105197Ssam dst0->sadb_address_prefixlen, 1876105197Ssam src0->sadb_address_proto, 1877105197Ssam &newsp->spidx); 1878105197Ssam 1879105197Ssam /* sanity check on addr pair */ 1880105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1881105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1882119643Ssam _key_delsp(newsp); 1883105197Ssam return key_senderror(so, m, EINVAL); 1884105197Ssam } 1885105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1886105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1887119643Ssam _key_delsp(newsp); 1888105197Ssam return key_senderror(so, m, EINVAL); 1889105197Ssam } 1890105197Ssam#if 1 1891105197Ssam if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1892105197Ssam struct sockaddr *sa; 1893105197Ssam sa = (struct sockaddr *)(src0 + 1); 1894105197Ssam if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1895119643Ssam _key_delsp(newsp); 1896105197Ssam return key_senderror(so, m, EINVAL); 1897105197Ssam } 1898105197Ssam } 1899105197Ssam if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1900105197Ssam struct sockaddr *sa; 1901105197Ssam sa = (struct sockaddr *)(dst0 + 1); 1902105197Ssam if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1903119643Ssam _key_delsp(newsp); 1904105197Ssam return key_senderror(so, m, EINVAL); 1905105197Ssam } 1906105197Ssam } 1907105197Ssam#endif 1908105197Ssam 1909105197Ssam newsp->created = time_second; 1910105197Ssam newsp->lastused = newsp->created; 1911105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1912105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1913105197Ssam 1914105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1915105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1916181803Sbz LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1917105197Ssam 1918105197Ssam /* delete the entry in spacqtree */ 1919105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1920119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1921119643Ssam if (spacq != NULL) { 1922105197Ssam /* reset counter in order to deletion by timehandler. */ 1923105197Ssam spacq->created = time_second; 1924105197Ssam spacq->count = 0; 1925120585Ssam SPACQ_UNLOCK(); 1926105197Ssam } 1927105197Ssam } 1928105197Ssam 1929105197Ssam { 1930105197Ssam struct mbuf *n, *mpolicy; 1931105197Ssam struct sadb_msg *newmsg; 1932105197Ssam int off; 1933105197Ssam 1934105197Ssam /* create new sadb_msg to reply. */ 1935105197Ssam if (lft) { 1936105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1937105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1938105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1939105197Ssam } else { 1940105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1941105197Ssam SADB_X_EXT_POLICY, 1942105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1943105197Ssam } 1944105197Ssam if (!n) 1945105197Ssam return key_senderror(so, m, ENOBUFS); 1946105197Ssam 1947105197Ssam if (n->m_len < sizeof(*newmsg)) { 1948105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1949105197Ssam if (!n) 1950105197Ssam return key_senderror(so, m, ENOBUFS); 1951105197Ssam } 1952105197Ssam newmsg = mtod(n, struct sadb_msg *); 1953105197Ssam newmsg->sadb_msg_errno = 0; 1954105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1955105197Ssam 1956105197Ssam off = 0; 1957105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1958105197Ssam sizeof(*xpl), &off); 1959105197Ssam if (mpolicy == NULL) { 1960105197Ssam /* n is already freed */ 1961105197Ssam return key_senderror(so, m, ENOBUFS); 1962105197Ssam } 1963105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1964105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1965105197Ssam m_freem(n); 1966105197Ssam return key_senderror(so, m, EINVAL); 1967105197Ssam } 1968105197Ssam xpl->sadb_x_policy_id = newsp->id; 1969105197Ssam 1970105197Ssam m_freem(m); 1971105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1972105197Ssam } 1973105197Ssam} 1974105197Ssam 1975105197Ssam/* 1976105197Ssam * get new policy id. 1977105197Ssam * OUT: 1978105197Ssam * 0: failure. 1979105197Ssam * others: success. 1980105197Ssam */ 1981105197Ssamstatic u_int32_t 1982105197Ssamkey_getnewspid() 1983105197Ssam{ 1984183550Szec INIT_VNET_IPSEC(curvnet); 1985105197Ssam u_int32_t newid = 0; 1986181803Sbz int count = V_key_spi_trycnt; /* XXX */ 1987105197Ssam struct secpolicy *sp; 1988105197Ssam 1989105197Ssam /* when requesting to allocate spi ranged */ 1990105197Ssam while (count--) { 1991181803Sbz newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 1992105197Ssam 1993105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 1994105197Ssam break; 1995105197Ssam 1996105197Ssam KEY_FREESP(&sp); 1997105197Ssam } 1998105197Ssam 1999105197Ssam if (count == 0 || newid == 0) { 2000120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2001120585Ssam __func__)); 2002105197Ssam return 0; 2003105197Ssam } 2004105197Ssam 2005105197Ssam return newid; 2006105197Ssam} 2007105197Ssam 2008105197Ssam/* 2009105197Ssam * SADB_SPDDELETE processing 2010105197Ssam * receive 2011105197Ssam * <base, address(SD), policy(*)> 2012105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2013105197Ssam * and send, 2014105197Ssam * <base, address(SD), policy(*)> 2015105197Ssam * to the ikmpd. 2016105197Ssam * policy(*) including direction of policy. 2017105197Ssam * 2018105197Ssam * m will always be freed. 2019105197Ssam */ 2020105197Ssamstatic int 2021105197Ssamkey_spddelete(so, m, mhp) 2022105197Ssam struct socket *so; 2023105197Ssam struct mbuf *m; 2024105197Ssam const struct sadb_msghdr *mhp; 2025105197Ssam{ 2026183550Szec INIT_VNET_IPSEC(curvnet); 2027105197Ssam struct sadb_address *src0, *dst0; 2028105197Ssam struct sadb_x_policy *xpl0; 2029105197Ssam struct secpolicyindex spidx; 2030105197Ssam struct secpolicy *sp; 2031105197Ssam 2032120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 2033120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2034120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2035120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2036105197Ssam 2037105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2038105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2039105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2040120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2041120585Ssam __func__)); 2042105197Ssam return key_senderror(so, m, EINVAL); 2043105197Ssam } 2044105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2045105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2046105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2047120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2048120585Ssam __func__)); 2049105197Ssam return key_senderror(so, m, EINVAL); 2050105197Ssam } 2051105197Ssam 2052105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2053105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2054105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2055105197Ssam 2056105197Ssam /* make secindex */ 2057105197Ssam /* XXX boundary check against sa_len */ 2058105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2059105197Ssam src0 + 1, 2060105197Ssam dst0 + 1, 2061105197Ssam src0->sadb_address_prefixlen, 2062105197Ssam dst0->sadb_address_prefixlen, 2063105197Ssam src0->sadb_address_proto, 2064105197Ssam &spidx); 2065105197Ssam 2066105197Ssam /* checking the direciton. */ 2067105197Ssam switch (xpl0->sadb_x_policy_dir) { 2068105197Ssam case IPSEC_DIR_INBOUND: 2069105197Ssam case IPSEC_DIR_OUTBOUND: 2070105197Ssam break; 2071105197Ssam default: 2072120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2073105197Ssam return key_senderror(so, m, EINVAL); 2074105197Ssam } 2075105197Ssam 2076105197Ssam /* Is there SP in SPD ? */ 2077105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2078120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2079105197Ssam return key_senderror(so, m, EINVAL); 2080105197Ssam } 2081105197Ssam 2082105197Ssam /* save policy id to buffer to be returned. */ 2083105197Ssam xpl0->sadb_x_policy_id = sp->id; 2084105197Ssam 2085105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2086105197Ssam KEY_FREESP(&sp); 2087105197Ssam 2088105197Ssam { 2089105197Ssam struct mbuf *n; 2090105197Ssam struct sadb_msg *newmsg; 2091105197Ssam 2092105197Ssam /* create new sadb_msg to reply. */ 2093105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2094105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2095105197Ssam if (!n) 2096105197Ssam return key_senderror(so, m, ENOBUFS); 2097105197Ssam 2098105197Ssam newmsg = mtod(n, struct sadb_msg *); 2099105197Ssam newmsg->sadb_msg_errno = 0; 2100105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2101105197Ssam 2102105197Ssam m_freem(m); 2103105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2104105197Ssam } 2105105197Ssam} 2106105197Ssam 2107105197Ssam/* 2108105197Ssam * SADB_SPDDELETE2 processing 2109105197Ssam * receive 2110105197Ssam * <base, policy(*)> 2111105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2112105197Ssam * and send, 2113105197Ssam * <base, policy(*)> 2114105197Ssam * to the ikmpd. 2115105197Ssam * policy(*) including direction of policy. 2116105197Ssam * 2117105197Ssam * m will always be freed. 2118105197Ssam */ 2119105197Ssamstatic int 2120105197Ssamkey_spddelete2(so, m, mhp) 2121105197Ssam struct socket *so; 2122105197Ssam struct mbuf *m; 2123105197Ssam const struct sadb_msghdr *mhp; 2124105197Ssam{ 2125183550Szec INIT_VNET_IPSEC(curvnet); 2126105197Ssam u_int32_t id; 2127105197Ssam struct secpolicy *sp; 2128105197Ssam 2129120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2130120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2131120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2132120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2133105197Ssam 2134105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2135105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2136120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2137170803Sbz return key_senderror(so, m, EINVAL); 2138105197Ssam } 2139105197Ssam 2140105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2141105197Ssam 2142105197Ssam /* Is there SP in SPD ? */ 2143105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2144120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2145170803Sbz return key_senderror(so, m, EINVAL); 2146105197Ssam } 2147105197Ssam 2148105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2149105197Ssam KEY_FREESP(&sp); 2150105197Ssam 2151105197Ssam { 2152105197Ssam struct mbuf *n, *nn; 2153105197Ssam struct sadb_msg *newmsg; 2154105197Ssam int off, len; 2155105197Ssam 2156105197Ssam /* create new sadb_msg to reply. */ 2157105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2158105197Ssam 2159111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2160105197Ssam if (n && len > MHLEN) { 2161111119Simp MCLGET(n, M_DONTWAIT); 2162105197Ssam if ((n->m_flags & M_EXT) == 0) { 2163105197Ssam m_freem(n); 2164105197Ssam n = NULL; 2165105197Ssam } 2166105197Ssam } 2167105197Ssam if (!n) 2168105197Ssam return key_senderror(so, m, ENOBUFS); 2169105197Ssam 2170105197Ssam n->m_len = len; 2171105197Ssam n->m_next = NULL; 2172105197Ssam off = 0; 2173105197Ssam 2174105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2175105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2176105197Ssam 2177120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2178120585Ssam off, len)); 2179105197Ssam 2180105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2181111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2182105197Ssam if (!n->m_next) { 2183105197Ssam m_freem(n); 2184105197Ssam return key_senderror(so, m, ENOBUFS); 2185105197Ssam } 2186105197Ssam 2187105197Ssam n->m_pkthdr.len = 0; 2188105197Ssam for (nn = n; nn; nn = nn->m_next) 2189105197Ssam n->m_pkthdr.len += nn->m_len; 2190105197Ssam 2191105197Ssam newmsg = mtod(n, struct sadb_msg *); 2192105197Ssam newmsg->sadb_msg_errno = 0; 2193105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2194105197Ssam 2195105197Ssam m_freem(m); 2196105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2197105197Ssam } 2198105197Ssam} 2199105197Ssam 2200105197Ssam/* 2201105197Ssam * SADB_X_GET processing 2202105197Ssam * receive 2203105197Ssam * <base, policy(*)> 2204105197Ssam * from the user(?), 2205105197Ssam * and send, 2206105197Ssam * <base, address(SD), policy> 2207105197Ssam * to the ikmpd. 2208105197Ssam * policy(*) including direction of policy. 2209105197Ssam * 2210105197Ssam * m will always be freed. 2211105197Ssam */ 2212105197Ssamstatic int 2213105197Ssamkey_spdget(so, m, mhp) 2214105197Ssam struct socket *so; 2215105197Ssam struct mbuf *m; 2216105197Ssam const struct sadb_msghdr *mhp; 2217105197Ssam{ 2218183550Szec INIT_VNET_IPSEC(curvnet); 2219105197Ssam u_int32_t id; 2220105197Ssam struct secpolicy *sp; 2221105197Ssam struct mbuf *n; 2222105197Ssam 2223120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2224120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2225120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2226120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2227105197Ssam 2228105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2229105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2230120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2231120585Ssam __func__)); 2232105197Ssam return key_senderror(so, m, EINVAL); 2233105197Ssam } 2234105197Ssam 2235105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2236105197Ssam 2237105197Ssam /* Is there SP in SPD ? */ 2238105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2239120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2240105197Ssam return key_senderror(so, m, ENOENT); 2241105197Ssam } 2242105197Ssam 2243105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2244105197Ssam if (n != NULL) { 2245105197Ssam m_freem(m); 2246105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2247105197Ssam } else 2248105197Ssam return key_senderror(so, m, ENOBUFS); 2249105197Ssam} 2250105197Ssam 2251105197Ssam/* 2252105197Ssam * SADB_X_SPDACQUIRE processing. 2253105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2254105197Ssam * send 2255105197Ssam * <base, policy(*)> 2256105197Ssam * to KMD, and expect to receive 2257105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2258105197Ssam * or 2259105197Ssam * <base, policy> 2260105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2261105197Ssam * policy(*) is without policy requests. 2262105197Ssam * 2263105197Ssam * 0 : succeed 2264105197Ssam * others: error number 2265105197Ssam */ 2266105197Ssamint 2267105197Ssamkey_spdacquire(sp) 2268105197Ssam struct secpolicy *sp; 2269105197Ssam{ 2270183550Szec INIT_VNET_IPSEC(curvnet); 2271105197Ssam struct mbuf *result = NULL, *m; 2272105197Ssam struct secspacq *newspacq; 2273105197Ssam 2274120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2275120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2276120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2277120585Ssam ("policy not IPSEC %u", sp->policy)); 2278105197Ssam 2279108533Sschweikh /* Get an entry to check whether sent message or not. */ 2280119643Ssam newspacq = key_getspacq(&sp->spidx); 2281119643Ssam if (newspacq != NULL) { 2282181803Sbz if (V_key_blockacq_count < newspacq->count) { 2283105197Ssam /* reset counter and do send message. */ 2284105197Ssam newspacq->count = 0; 2285105197Ssam } else { 2286105197Ssam /* increment counter and do nothing. */ 2287105197Ssam newspacq->count++; 2288105197Ssam return 0; 2289105197Ssam } 2290120585Ssam SPACQ_UNLOCK(); 2291105197Ssam } else { 2292105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2293119643Ssam newspacq = key_newspacq(&sp->spidx); 2294119643Ssam if (newspacq == NULL) 2295105197Ssam return ENOBUFS; 2296105197Ssam } 2297105197Ssam 2298105197Ssam /* create new sadb_msg to reply. */ 2299105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2300170805Sbz if (!m) 2301170805Sbz return ENOBUFS; 2302170805Sbz 2303105197Ssam result = m; 2304105197Ssam 2305105197Ssam result->m_pkthdr.len = 0; 2306105197Ssam for (m = result; m; m = m->m_next) 2307105197Ssam result->m_pkthdr.len += m->m_len; 2308105197Ssam 2309105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2310105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2311105197Ssam 2312105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2313105197Ssam} 2314105197Ssam 2315105197Ssam/* 2316105197Ssam * SADB_SPDFLUSH processing 2317105197Ssam * receive 2318105197Ssam * <base> 2319105197Ssam * from the user, and free all entries in secpctree. 2320105197Ssam * and send, 2321105197Ssam * <base> 2322105197Ssam * to the user. 2323105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2324105197Ssam * 2325105197Ssam * m will always be freed. 2326105197Ssam */ 2327105197Ssamstatic int 2328105197Ssamkey_spdflush(so, m, mhp) 2329105197Ssam struct socket *so; 2330105197Ssam struct mbuf *m; 2331105197Ssam const struct sadb_msghdr *mhp; 2332105197Ssam{ 2333183550Szec INIT_VNET_IPSEC(curvnet); 2334105197Ssam struct sadb_msg *newmsg; 2335105197Ssam struct secpolicy *sp; 2336105197Ssam u_int dir; 2337105197Ssam 2338120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2339120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2340120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2341120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2342105197Ssam 2343105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2344105197Ssam return key_senderror(so, m, EINVAL); 2345105197Ssam 2346105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2347120585Ssam SPTREE_LOCK(); 2348181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) 2349105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2350120585Ssam SPTREE_UNLOCK(); 2351105197Ssam } 2352105197Ssam 2353105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2354120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2355105197Ssam return key_senderror(so, m, ENOBUFS); 2356105197Ssam } 2357105197Ssam 2358105197Ssam if (m->m_next) 2359105197Ssam m_freem(m->m_next); 2360105197Ssam m->m_next = NULL; 2361105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2362105197Ssam newmsg = mtod(m, struct sadb_msg *); 2363105197Ssam newmsg->sadb_msg_errno = 0; 2364105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2365105197Ssam 2366105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2367105197Ssam} 2368105197Ssam 2369105197Ssam/* 2370105197Ssam * SADB_SPDDUMP processing 2371105197Ssam * receive 2372105197Ssam * <base> 2373105197Ssam * from the user, and dump all SP leaves 2374105197Ssam * and send, 2375105197Ssam * <base> ..... 2376105197Ssam * to the ikmpd. 2377105197Ssam * 2378105197Ssam * m will always be freed. 2379105197Ssam */ 2380105197Ssamstatic int 2381105197Ssamkey_spddump(so, m, mhp) 2382105197Ssam struct socket *so; 2383105197Ssam struct mbuf *m; 2384105197Ssam const struct sadb_msghdr *mhp; 2385105197Ssam{ 2386183550Szec INIT_VNET_IPSEC(curvnet); 2387105197Ssam struct secpolicy *sp; 2388105197Ssam int cnt; 2389105197Ssam u_int dir; 2390105197Ssam struct mbuf *n; 2391105197Ssam 2392120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2393120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2394120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2395120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2396105197Ssam 2397105197Ssam /* search SPD entry and get buffer size. */ 2398105197Ssam cnt = 0; 2399105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2400181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2401105197Ssam cnt++; 2402105197Ssam } 2403105197Ssam } 2404105197Ssam 2405105197Ssam if (cnt == 0) 2406105197Ssam return key_senderror(so, m, ENOENT); 2407105197Ssam 2408105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2409181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2410105197Ssam --cnt; 2411105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2412105197Ssam mhp->msg->sadb_msg_pid); 2413105197Ssam 2414105197Ssam if (n) 2415105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2416105197Ssam } 2417105197Ssam } 2418105197Ssam 2419105197Ssam m_freem(m); 2420105197Ssam return 0; 2421105197Ssam} 2422105197Ssam 2423105197Ssamstatic struct mbuf * 2424189004Srdivackykey_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2425105197Ssam{ 2426105197Ssam struct mbuf *result = NULL, *m; 2427181330Svanhu struct seclifetime lt; 2428105197Ssam 2429105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2430105197Ssam if (!m) 2431105197Ssam goto fail; 2432105197Ssam result = m; 2433105197Ssam 2434105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2435105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2436105197Ssam sp->spidx.ul_proto); 2437105197Ssam if (!m) 2438105197Ssam goto fail; 2439105197Ssam m_cat(result, m); 2440105197Ssam 2441105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2442105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2443105197Ssam sp->spidx.ul_proto); 2444105197Ssam if (!m) 2445105197Ssam goto fail; 2446105197Ssam m_cat(result, m); 2447105197Ssam 2448105197Ssam m = key_sp2msg(sp); 2449105197Ssam if (!m) 2450105197Ssam goto fail; 2451105197Ssam m_cat(result, m); 2452105197Ssam 2453181330Svanhu if(sp->lifetime){ 2454181330Svanhu lt.addtime=sp->created; 2455181330Svanhu lt.usetime= sp->lastused; 2456181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2457181330Svanhu if (!m) 2458181330Svanhu goto fail; 2459181330Svanhu m_cat(result, m); 2460181330Svanhu 2461181330Svanhu lt.addtime=sp->lifetime; 2462181330Svanhu lt.usetime= sp->validtime; 2463181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2464181330Svanhu if (!m) 2465181330Svanhu goto fail; 2466181330Svanhu m_cat(result, m); 2467181330Svanhu } 2468181330Svanhu 2469105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2470105197Ssam goto fail; 2471105197Ssam 2472105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2473105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2474105197Ssam if (result == NULL) 2475105197Ssam goto fail; 2476105197Ssam } 2477105197Ssam 2478105197Ssam result->m_pkthdr.len = 0; 2479105197Ssam for (m = result; m; m = m->m_next) 2480105197Ssam result->m_pkthdr.len += m->m_len; 2481105197Ssam 2482105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2483105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2484105197Ssam 2485105197Ssam return result; 2486105197Ssam 2487105197Ssamfail: 2488105197Ssam m_freem(result); 2489105197Ssam return NULL; 2490105197Ssam} 2491105197Ssam 2492105197Ssam/* 2493105197Ssam * get PFKEY message length for security policy and request. 2494105197Ssam */ 2495105197Ssamstatic u_int 2496105197Ssamkey_getspreqmsglen(sp) 2497105197Ssam struct secpolicy *sp; 2498105197Ssam{ 2499105197Ssam u_int tlen; 2500105197Ssam 2501105197Ssam tlen = sizeof(struct sadb_x_policy); 2502105197Ssam 2503105197Ssam /* if is the policy for ipsec ? */ 2504105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2505105197Ssam return tlen; 2506105197Ssam 2507105197Ssam /* get length of ipsec requests */ 2508105197Ssam { 2509105197Ssam struct ipsecrequest *isr; 2510105197Ssam int len; 2511105197Ssam 2512105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2513105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2514105197Ssam + isr->saidx.src.sa.sa_len 2515105197Ssam + isr->saidx.dst.sa.sa_len; 2516105197Ssam 2517105197Ssam tlen += PFKEY_ALIGN8(len); 2518105197Ssam } 2519105197Ssam } 2520105197Ssam 2521105197Ssam return tlen; 2522105197Ssam} 2523105197Ssam 2524105197Ssam/* 2525105197Ssam * SADB_SPDEXPIRE processing 2526105197Ssam * send 2527105197Ssam * <base, address(SD), lifetime(CH), policy> 2528105197Ssam * to KMD by PF_KEY. 2529105197Ssam * 2530105197Ssam * OUT: 0 : succeed 2531105197Ssam * others : error number 2532105197Ssam */ 2533105197Ssamstatic int 2534105197Ssamkey_spdexpire(sp) 2535105197Ssam struct secpolicy *sp; 2536105197Ssam{ 2537105197Ssam struct mbuf *result = NULL, *m; 2538105197Ssam int len; 2539105197Ssam int error = -1; 2540105197Ssam struct sadb_lifetime *lt; 2541105197Ssam 2542105197Ssam /* XXX: Why do we lock ? */ 2543105197Ssam 2544120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2545105197Ssam 2546105197Ssam /* set msg header */ 2547105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2548105197Ssam if (!m) { 2549105197Ssam error = ENOBUFS; 2550105197Ssam goto fail; 2551105197Ssam } 2552105197Ssam result = m; 2553105197Ssam 2554105197Ssam /* create lifetime extension (current and hard) */ 2555105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2556105197Ssam m = key_alloc_mbuf(len); 2557105197Ssam if (!m || m->m_next) { /*XXX*/ 2558105197Ssam if (m) 2559105197Ssam m_freem(m); 2560105197Ssam error = ENOBUFS; 2561105197Ssam goto fail; 2562105197Ssam } 2563105197Ssam bzero(mtod(m, caddr_t), len); 2564105197Ssam lt = mtod(m, struct sadb_lifetime *); 2565105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2566105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2567105197Ssam lt->sadb_lifetime_allocations = 0; 2568105197Ssam lt->sadb_lifetime_bytes = 0; 2569105197Ssam lt->sadb_lifetime_addtime = sp->created; 2570105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2571105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2572105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2573105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2574105197Ssam lt->sadb_lifetime_allocations = 0; 2575105197Ssam lt->sadb_lifetime_bytes = 0; 2576105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2577105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2578105197Ssam m_cat(result, m); 2579105197Ssam 2580105197Ssam /* set sadb_address for source */ 2581105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2582105197Ssam &sp->spidx.src.sa, 2583105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2584105197Ssam if (!m) { 2585105197Ssam error = ENOBUFS; 2586105197Ssam goto fail; 2587105197Ssam } 2588105197Ssam m_cat(result, m); 2589105197Ssam 2590105197Ssam /* set sadb_address for destination */ 2591105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2592105197Ssam &sp->spidx.dst.sa, 2593105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2594105197Ssam if (!m) { 2595105197Ssam error = ENOBUFS; 2596105197Ssam goto fail; 2597105197Ssam } 2598105197Ssam m_cat(result, m); 2599105197Ssam 2600105197Ssam /* set secpolicy */ 2601105197Ssam m = key_sp2msg(sp); 2602105197Ssam if (!m) { 2603105197Ssam error = ENOBUFS; 2604105197Ssam goto fail; 2605105197Ssam } 2606105197Ssam m_cat(result, m); 2607105197Ssam 2608105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2609105197Ssam error = EINVAL; 2610105197Ssam goto fail; 2611105197Ssam } 2612105197Ssam 2613105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2614105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2615105197Ssam if (result == NULL) { 2616105197Ssam error = ENOBUFS; 2617105197Ssam goto fail; 2618105197Ssam } 2619105197Ssam } 2620105197Ssam 2621105197Ssam result->m_pkthdr.len = 0; 2622105197Ssam for (m = result; m; m = m->m_next) 2623105197Ssam result->m_pkthdr.len += m->m_len; 2624105197Ssam 2625105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2626105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2627105197Ssam 2628105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2629105197Ssam 2630105197Ssam fail: 2631105197Ssam if (result) 2632105197Ssam m_freem(result); 2633105197Ssam return error; 2634105197Ssam} 2635105197Ssam 2636105197Ssam/* %%% SAD management */ 2637105197Ssam/* 2638105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2639105197Ssam * OUT: NULL : failure due to the lack of memory. 2640105197Ssam * others : pointer to new SA head. 2641105197Ssam */ 2642105197Ssamstatic struct secashead * 2643105197Ssamkey_newsah(saidx) 2644105197Ssam struct secasindex *saidx; 2645105197Ssam{ 2646183550Szec INIT_VNET_IPSEC(curvnet); 2647105197Ssam struct secashead *newsah; 2648105197Ssam 2649120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2650105197Ssam 2651119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2652105197Ssam if (newsah != NULL) { 2653105197Ssam int i; 2654105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2655105197Ssam LIST_INIT(&newsah->savtree[i]); 2656105197Ssam newsah->saidx = *saidx; 2657105197Ssam 2658105197Ssam /* add to saidxtree */ 2659105197Ssam newsah->state = SADB_SASTATE_MATURE; 2660119643Ssam 2661120585Ssam SAHTREE_LOCK(); 2662181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2663120585Ssam SAHTREE_UNLOCK(); 2664105197Ssam } 2665105197Ssam return(newsah); 2666105197Ssam} 2667105197Ssam 2668105197Ssam/* 2669105197Ssam * delete SA index and all SA registerd. 2670105197Ssam */ 2671105197Ssamstatic void 2672105197Ssamkey_delsah(sah) 2673105197Ssam struct secashead *sah; 2674105197Ssam{ 2675183550Szec INIT_VNET_IPSEC(curvnet); 2676105197Ssam struct secasvar *sav, *nextsav; 2677120585Ssam u_int stateidx; 2678105197Ssam int zombie = 0; 2679105197Ssam 2680120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2681120585Ssam SAHTREE_LOCK_ASSERT(); 2682105197Ssam 2683105197Ssam /* searching all SA registerd in the secindex. */ 2684105197Ssam for (stateidx = 0; 2685185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2686105197Ssam stateidx++) { 2687185348Szec u_int state = saorder_state_any[stateidx]; 2688120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2689105197Ssam if (sav->refcnt == 0) { 2690105197Ssam /* sanity check */ 2691120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2692190071Svanhu /* 2693190071Svanhu * do NOT call KEY_FREESAV here: 2694190071Svanhu * it will only delete the sav if refcnt == 1, 2695189962Svanhu * where we already know that refcnt == 0 2696189962Svanhu */ 2697189962Svanhu key_delsav(sav); 2698105197Ssam } else { 2699105197Ssam /* give up to delete this sa */ 2700105197Ssam zombie++; 2701105197Ssam } 2702105197Ssam } 2703105197Ssam } 2704120585Ssam if (!zombie) { /* delete only if there are savs */ 2705120585Ssam /* remove from tree of SA index */ 2706120585Ssam if (__LIST_CHAINED(sah)) 2707120585Ssam LIST_REMOVE(sah, chain); 2708120585Ssam if (sah->sa_route.ro_rt) { 2709120585Ssam RTFREE(sah->sa_route.ro_rt); 2710120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2711120585Ssam } 2712120585Ssam free(sah, M_IPSEC_SAH); 2713105197Ssam } 2714105197Ssam} 2715105197Ssam 2716105197Ssam/* 2717105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2718105197Ssam * and copy the values of mhp into new buffer. 2719105197Ssam * When SAD message type is GETSPI: 2720105197Ssam * to set sequence number from acq_seq++, 2721105197Ssam * to set zero to SPI. 2722105197Ssam * not to call key_setsava(). 2723105197Ssam * OUT: NULL : fail 2724105197Ssam * others : pointer to new secasvar. 2725105197Ssam * 2726105197Ssam * does not modify mbuf. does not free mbuf on error. 2727105197Ssam */ 2728105197Ssamstatic struct secasvar * 2729105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2730105197Ssam struct mbuf *m; 2731105197Ssam const struct sadb_msghdr *mhp; 2732105197Ssam struct secashead *sah; 2733105197Ssam int *errp; 2734105197Ssam const char* where; 2735105197Ssam int tag; 2736105197Ssam{ 2737183550Szec INIT_VNET_IPSEC(curvnet); 2738105197Ssam struct secasvar *newsav; 2739105197Ssam const struct sadb_sa *xsa; 2740105197Ssam 2741120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2742120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2743120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2744120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2745105197Ssam 2746119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2747105197Ssam if (newsav == NULL) { 2748120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2749105197Ssam *errp = ENOBUFS; 2750105197Ssam goto done; 2751105197Ssam } 2752105197Ssam 2753105197Ssam switch (mhp->msg->sadb_msg_type) { 2754105197Ssam case SADB_GETSPI: 2755105197Ssam newsav->spi = 0; 2756105197Ssam 2757105197Ssam#ifdef IPSEC_DOSEQCHECK 2758105197Ssam /* sync sequence number */ 2759105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2760105197Ssam newsav->seq = 2761181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2762105197Ssam else 2763105197Ssam#endif 2764105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2765105197Ssam break; 2766105197Ssam 2767105197Ssam case SADB_ADD: 2768105197Ssam /* sanity check */ 2769105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2770119643Ssam free(newsav, M_IPSEC_SA); 2771119643Ssam newsav = NULL; 2772120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2773120585Ssam __func__)); 2774105197Ssam *errp = EINVAL; 2775105197Ssam goto done; 2776105197Ssam } 2777105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2778105197Ssam newsav->spi = xsa->sadb_sa_spi; 2779105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2780105197Ssam break; 2781105197Ssam default: 2782119643Ssam free(newsav, M_IPSEC_SA); 2783119643Ssam newsav = NULL; 2784105197Ssam *errp = EINVAL; 2785105197Ssam goto done; 2786105197Ssam } 2787105197Ssam 2788119643Ssam 2789105197Ssam /* copy sav values */ 2790105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2791105197Ssam *errp = key_setsaval(newsav, m, mhp); 2792105197Ssam if (*errp) { 2793119643Ssam free(newsav, M_IPSEC_SA); 2794119643Ssam newsav = NULL; 2795105197Ssam goto done; 2796105197Ssam } 2797105197Ssam } 2798105197Ssam 2799120585Ssam SECASVAR_LOCK_INIT(newsav); 2800119643Ssam 2801105197Ssam /* reset created */ 2802105197Ssam newsav->created = time_second; 2803105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2804105197Ssam 2805105197Ssam /* add to satree */ 2806105197Ssam newsav->sah = sah; 2807158767Spjd sa_initref(newsav); 2808105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2809119643Ssam 2810119643Ssam /* XXX locking??? */ 2811105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2812105197Ssam secasvar, chain); 2813105197Ssamdone: 2814105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2815120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2816105197Ssam where, tag, newsav)); 2817105197Ssam 2818105197Ssam return newsav; 2819105197Ssam} 2820105197Ssam 2821105197Ssam/* 2822105197Ssam * free() SA variable entry. 2823105197Ssam */ 2824105197Ssamstatic void 2825119643Ssamkey_cleansav(struct secasvar *sav) 2826105197Ssam{ 2827117051Ssam /* 2828117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2829117051Ssam * keys to be cleared; otherwise we must do it ourself. 2830117051Ssam */ 2831117051Ssam if (sav->tdb_xform != NULL) { 2832117051Ssam sav->tdb_xform->xf_zeroize(sav); 2833117051Ssam sav->tdb_xform = NULL; 2834117051Ssam } else { 2835120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2836117051Ssam if (sav->key_auth != NULL) 2837157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2838117051Ssam if (sav->key_enc != NULL) 2839157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2840117051Ssam } 2841105197Ssam if (sav->key_auth != NULL) { 2842157123Sgnn if (sav->key_auth->key_data != NULL) 2843157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2844119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2845105197Ssam sav->key_auth = NULL; 2846105197Ssam } 2847105197Ssam if (sav->key_enc != NULL) { 2848157123Sgnn if (sav->key_enc->key_data != NULL) 2849157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2850119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2851105197Ssam sav->key_enc = NULL; 2852105197Ssam } 2853105197Ssam if (sav->sched) { 2854105197Ssam bzero(sav->sched, sav->schedlen); 2855119643Ssam free(sav->sched, M_IPSEC_MISC); 2856105197Ssam sav->sched = NULL; 2857105197Ssam } 2858105197Ssam if (sav->replay != NULL) { 2859119643Ssam free(sav->replay, M_IPSEC_MISC); 2860105197Ssam sav->replay = NULL; 2861105197Ssam } 2862105197Ssam if (sav->lft_c != NULL) { 2863119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2864105197Ssam sav->lft_c = NULL; 2865105197Ssam } 2866105197Ssam if (sav->lft_h != NULL) { 2867119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2868105197Ssam sav->lft_h = NULL; 2869105197Ssam } 2870105197Ssam if (sav->lft_s != NULL) { 2871119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2872105197Ssam sav->lft_s = NULL; 2873105197Ssam } 2874119643Ssam} 2875105197Ssam 2876119643Ssam/* 2877119643Ssam * free() SA variable entry. 2878119643Ssam */ 2879119643Ssamstatic void 2880119643Ssamkey_delsav(sav) 2881119643Ssam struct secasvar *sav; 2882119643Ssam{ 2883120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2884120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2885105197Ssam 2886119643Ssam /* remove from SA header */ 2887119643Ssam if (__LIST_CHAINED(sav)) 2888119643Ssam LIST_REMOVE(sav, chain); 2889119643Ssam key_cleansav(sav); 2890120585Ssam SECASVAR_LOCK_DESTROY(sav); 2891119643Ssam free(sav, M_IPSEC_SA); 2892105197Ssam} 2893105197Ssam 2894105197Ssam/* 2895105197Ssam * search SAD. 2896105197Ssam * OUT: 2897105197Ssam * NULL : not found 2898105197Ssam * others : found, pointer to a SA. 2899105197Ssam */ 2900105197Ssamstatic struct secashead * 2901105197Ssamkey_getsah(saidx) 2902105197Ssam struct secasindex *saidx; 2903105197Ssam{ 2904183550Szec INIT_VNET_IPSEC(curvnet); 2905105197Ssam struct secashead *sah; 2906105197Ssam 2907120585Ssam SAHTREE_LOCK(); 2908181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2909105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2910105197Ssam continue; 2911105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2912119643Ssam break; 2913105197Ssam } 2914120585Ssam SAHTREE_UNLOCK(); 2915105197Ssam 2916119643Ssam return sah; 2917105197Ssam} 2918105197Ssam 2919105197Ssam/* 2920105197Ssam * check not to be duplicated SPI. 2921105197Ssam * NOTE: this function is too slow due to searching all SAD. 2922105197Ssam * OUT: 2923105197Ssam * NULL : not found 2924105197Ssam * others : found, pointer to a SA. 2925105197Ssam */ 2926105197Ssamstatic struct secasvar * 2927105197Ssamkey_checkspidup(saidx, spi) 2928105197Ssam struct secasindex *saidx; 2929105197Ssam u_int32_t spi; 2930105197Ssam{ 2931183550Szec INIT_VNET_IPSEC(curvnet); 2932105197Ssam struct secashead *sah; 2933105197Ssam struct secasvar *sav; 2934105197Ssam 2935105197Ssam /* check address family */ 2936105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2937120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2938120585Ssam __func__)); 2939105197Ssam return NULL; 2940105197Ssam } 2941105197Ssam 2942119643Ssam sav = NULL; 2943105197Ssam /* check all SAD */ 2944120585Ssam SAHTREE_LOCK(); 2945181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2946105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2947105197Ssam continue; 2948105197Ssam sav = key_getsavbyspi(sah, spi); 2949105197Ssam if (sav != NULL) 2950119643Ssam break; 2951105197Ssam } 2952120585Ssam SAHTREE_UNLOCK(); 2953105197Ssam 2954119643Ssam return sav; 2955105197Ssam} 2956105197Ssam 2957105197Ssam/* 2958105197Ssam * search SAD litmited alive SA, protocol, SPI. 2959105197Ssam * OUT: 2960105197Ssam * NULL : not found 2961105197Ssam * others : found, pointer to a SA. 2962105197Ssam */ 2963105197Ssamstatic struct secasvar * 2964105197Ssamkey_getsavbyspi(sah, spi) 2965105197Ssam struct secashead *sah; 2966105197Ssam u_int32_t spi; 2967105197Ssam{ 2968183550Szec INIT_VNET_IPSEC(curvnet); 2969105197Ssam struct secasvar *sav; 2970105197Ssam u_int stateidx, state; 2971105197Ssam 2972119643Ssam sav = NULL; 2973120585Ssam SAHTREE_LOCK_ASSERT(); 2974105197Ssam /* search all status */ 2975105197Ssam for (stateidx = 0; 2976185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 2977105197Ssam stateidx++) { 2978105197Ssam 2979185348Szec state = saorder_state_alive[stateidx]; 2980105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 2981105197Ssam 2982105197Ssam /* sanity check */ 2983105197Ssam if (sav->state != state) { 2984120585Ssam ipseclog((LOG_DEBUG, "%s: " 2985105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 2986120585Ssam __func__, state, sav->state)); 2987105197Ssam continue; 2988105197Ssam } 2989105197Ssam 2990105197Ssam if (sav->spi == spi) 2991128859Ssam return sav; 2992105197Ssam } 2993105197Ssam } 2994105197Ssam 2995128859Ssam return NULL; 2996105197Ssam} 2997105197Ssam 2998105197Ssam/* 2999105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3000105197Ssam * You must update these if need. 3001105197Ssam * OUT: 0: success. 3002105197Ssam * !0: failure. 3003105197Ssam * 3004105197Ssam * does not modify mbuf. does not free mbuf on error. 3005105197Ssam */ 3006105197Ssamstatic int 3007105197Ssamkey_setsaval(sav, m, mhp) 3008105197Ssam struct secasvar *sav; 3009105197Ssam struct mbuf *m; 3010105197Ssam const struct sadb_msghdr *mhp; 3011105197Ssam{ 3012183550Szec INIT_VNET_IPSEC(curvnet); 3013105197Ssam int error = 0; 3014105197Ssam 3015120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3016120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3017120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3018105197Ssam 3019105197Ssam /* initialization */ 3020105197Ssam sav->replay = NULL; 3021105197Ssam sav->key_auth = NULL; 3022105197Ssam sav->key_enc = NULL; 3023105197Ssam sav->sched = NULL; 3024105197Ssam sav->schedlen = 0; 3025105197Ssam sav->iv = NULL; 3026105197Ssam sav->lft_c = NULL; 3027105197Ssam sav->lft_h = NULL; 3028105197Ssam sav->lft_s = NULL; 3029105197Ssam sav->tdb_xform = NULL; /* transform */ 3030105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3031105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3032105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3033105197Ssam 3034105197Ssam /* SA */ 3035105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3036105197Ssam const struct sadb_sa *sa0; 3037105197Ssam 3038105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3039105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3040105197Ssam error = EINVAL; 3041105197Ssam goto fail; 3042105197Ssam } 3043105197Ssam 3044105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3045105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3046105197Ssam sav->flags = sa0->sadb_sa_flags; 3047105197Ssam 3048105197Ssam /* replay window */ 3049105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3050105197Ssam sav->replay = (struct secreplay *) 3051119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3052105197Ssam if (sav->replay == NULL) { 3053120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3054120585Ssam __func__)); 3055105197Ssam error = ENOBUFS; 3056105197Ssam goto fail; 3057105197Ssam } 3058105197Ssam if (sa0->sadb_sa_replay != 0) 3059105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3060105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3061105197Ssam } 3062105197Ssam } 3063105197Ssam 3064105197Ssam /* Authentication keys */ 3065105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3066105197Ssam const struct sadb_key *key0; 3067105197Ssam int len; 3068105197Ssam 3069105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3070105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3071105197Ssam 3072105197Ssam error = 0; 3073105197Ssam if (len < sizeof(*key0)) { 3074105197Ssam error = EINVAL; 3075105197Ssam goto fail; 3076105197Ssam } 3077105197Ssam switch (mhp->msg->sadb_msg_satype) { 3078105197Ssam case SADB_SATYPE_AH: 3079105197Ssam case SADB_SATYPE_ESP: 3080125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3081105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3082105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3083105197Ssam error = EINVAL; 3084105197Ssam break; 3085105197Ssam case SADB_X_SATYPE_IPCOMP: 3086105197Ssam default: 3087105197Ssam error = EINVAL; 3088105197Ssam break; 3089105197Ssam } 3090105197Ssam if (error) { 3091120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3092120585Ssam __func__)); 3093105197Ssam goto fail; 3094105197Ssam } 3095105197Ssam 3096157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3097157123Sgnn M_IPSEC_MISC); 3098157123Sgnn if (sav->key_auth == NULL ) { 3099157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3100157123Sgnn __func__)); 3101105197Ssam error = ENOBUFS; 3102105197Ssam goto fail; 3103105197Ssam } 3104105197Ssam } 3105105197Ssam 3106105197Ssam /* Encryption key */ 3107105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3108105197Ssam const struct sadb_key *key0; 3109105197Ssam int len; 3110105197Ssam 3111105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3112105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3113105197Ssam 3114105197Ssam error = 0; 3115105197Ssam if (len < sizeof(*key0)) { 3116105197Ssam error = EINVAL; 3117105197Ssam goto fail; 3118105197Ssam } 3119105197Ssam switch (mhp->msg->sadb_msg_satype) { 3120105197Ssam case SADB_SATYPE_ESP: 3121105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3122105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3123105197Ssam error = EINVAL; 3124105197Ssam break; 3125105197Ssam } 3126157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3127157123Sgnn len, 3128157123Sgnn M_IPSEC_MISC); 3129105197Ssam if (sav->key_enc == NULL) { 3130120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3131120585Ssam __func__)); 3132105197Ssam error = ENOBUFS; 3133105197Ssam goto fail; 3134105197Ssam } 3135105197Ssam break; 3136105197Ssam case SADB_X_SATYPE_IPCOMP: 3137105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3138105197Ssam error = EINVAL; 3139105197Ssam sav->key_enc = NULL; /*just in case*/ 3140105197Ssam break; 3141105197Ssam case SADB_SATYPE_AH: 3142125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3143105197Ssam default: 3144105197Ssam error = EINVAL; 3145105197Ssam break; 3146105197Ssam } 3147105197Ssam if (error) { 3148120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3149120585Ssam __func__)); 3150105197Ssam goto fail; 3151105197Ssam } 3152105197Ssam } 3153105197Ssam 3154105197Ssam /* set iv */ 3155105197Ssam sav->ivlen = 0; 3156105197Ssam 3157105197Ssam switch (mhp->msg->sadb_msg_satype) { 3158105197Ssam case SADB_SATYPE_AH: 3159105197Ssam error = xform_init(sav, XF_AH); 3160105197Ssam break; 3161105197Ssam case SADB_SATYPE_ESP: 3162105197Ssam error = xform_init(sav, XF_ESP); 3163105197Ssam break; 3164105197Ssam case SADB_X_SATYPE_IPCOMP: 3165105197Ssam error = xform_init(sav, XF_IPCOMP); 3166105197Ssam break; 3167125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3168125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3169125680Sbms break; 3170105197Ssam } 3171105197Ssam if (error) { 3172120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3173120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3174105197Ssam goto fail; 3175105197Ssam } 3176105197Ssam 3177105197Ssam /* reset created */ 3178105197Ssam sav->created = time_second; 3179105197Ssam 3180105197Ssam /* make lifetime for CURRENT */ 3181176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3182105197Ssam if (sav->lft_c == NULL) { 3183120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3184105197Ssam error = ENOBUFS; 3185105197Ssam goto fail; 3186105197Ssam } 3187105197Ssam 3188157123Sgnn sav->lft_c->allocations = 0; 3189157123Sgnn sav->lft_c->bytes = 0; 3190157123Sgnn sav->lft_c->addtime = time_second; 3191157123Sgnn sav->lft_c->usetime = 0; 3192105197Ssam 3193105197Ssam /* lifetimes for HARD and SOFT */ 3194105197Ssam { 3195105197Ssam const struct sadb_lifetime *lft0; 3196105197Ssam 3197105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3198105197Ssam if (lft0 != NULL) { 3199105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3200105197Ssam error = EINVAL; 3201105197Ssam goto fail; 3202105197Ssam } 3203157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3204105197Ssam if (sav->lft_h == NULL) { 3205120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3206105197Ssam error = ENOBUFS; 3207105197Ssam goto fail; 3208105197Ssam } 3209105197Ssam /* to be initialize ? */ 3210105197Ssam } 3211105197Ssam 3212105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3213105197Ssam if (lft0 != NULL) { 3214105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3215105197Ssam error = EINVAL; 3216105197Ssam goto fail; 3217105197Ssam } 3218157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3219105197Ssam if (sav->lft_s == NULL) { 3220120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3221105197Ssam error = ENOBUFS; 3222105197Ssam goto fail; 3223105197Ssam } 3224105197Ssam /* to be initialize ? */ 3225105197Ssam } 3226105197Ssam } 3227105197Ssam 3228105197Ssam return 0; 3229105197Ssam 3230105197Ssam fail: 3231105197Ssam /* initialization */ 3232119643Ssam key_cleansav(sav); 3233105197Ssam 3234105197Ssam return error; 3235105197Ssam} 3236105197Ssam 3237105197Ssam/* 3238105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3239105197Ssam * OUT: 0: valid 3240105197Ssam * other: errno 3241105197Ssam */ 3242105197Ssamstatic int 3243119643Ssamkey_mature(struct secasvar *sav) 3244105197Ssam{ 3245183550Szec INIT_VNET_IPSEC(curvnet); 3246105197Ssam int error; 3247105197Ssam 3248105197Ssam /* check SPI value */ 3249105197Ssam switch (sav->sah->saidx.proto) { 3250105197Ssam case IPPROTO_ESP: 3251105197Ssam case IPPROTO_AH: 3252170823Sbz /* 3253170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3254170823Sbz * 1-255 reserved by IANA for future use, 3255170823Sbz * 0 for implementation specific, local use. 3256170823Sbz */ 3257170823Sbz if (ntohl(sav->spi) <= 255) { 3258120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3259120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3260105197Ssam return EINVAL; 3261105197Ssam } 3262105197Ssam break; 3263105197Ssam } 3264105197Ssam 3265105197Ssam /* check satype */ 3266105197Ssam switch (sav->sah->saidx.proto) { 3267105197Ssam case IPPROTO_ESP: 3268105197Ssam /* check flags */ 3269105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3270105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3271120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3272120585Ssam "given to old-esp.\n", __func__)); 3273105197Ssam return EINVAL; 3274105197Ssam } 3275105197Ssam error = xform_init(sav, XF_ESP); 3276105197Ssam break; 3277105197Ssam case IPPROTO_AH: 3278105197Ssam /* check flags */ 3279105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3280120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3281120585Ssam "given to AH SA.\n", __func__)); 3282105197Ssam return EINVAL; 3283105197Ssam } 3284105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3285120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3286120585Ssam "mismated.\n", __func__)); 3287105197Ssam return(EINVAL); 3288105197Ssam } 3289105197Ssam error = xform_init(sav, XF_AH); 3290105197Ssam break; 3291105197Ssam case IPPROTO_IPCOMP: 3292105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3293120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3294120585Ssam "mismated.\n", __func__)); 3295105197Ssam return(EINVAL); 3296105197Ssam } 3297105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3298105197Ssam && ntohl(sav->spi) >= 0x10000) { 3299120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3300120585Ssam __func__)); 3301105197Ssam return(EINVAL); 3302105197Ssam } 3303105197Ssam error = xform_init(sav, XF_IPCOMP); 3304105197Ssam break; 3305125680Sbms case IPPROTO_TCP: 3306125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3307125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3308125680Sbms "mismated.\n", __func__)); 3309125680Sbms return(EINVAL); 3310125680Sbms } 3311125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3312125680Sbms break; 3313105197Ssam default: 3314120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3315105197Ssam error = EPROTONOSUPPORT; 3316105197Ssam break; 3317105197Ssam } 3318119643Ssam if (error == 0) { 3319120585Ssam SAHTREE_LOCK(); 3320105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3321120585Ssam SAHTREE_UNLOCK(); 3322119643Ssam } 3323105197Ssam return (error); 3324105197Ssam} 3325105197Ssam 3326105197Ssam/* 3327105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3328105197Ssam */ 3329105197Ssamstatic struct mbuf * 3330189004Srdivackykey_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3331189004Srdivacky u_int32_t seq, u_int32_t pid) 3332105197Ssam{ 3333105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3334105197Ssam int i; 3335105197Ssam int dumporder[] = { 3336105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3337105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3338105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3339105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3340105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3341105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3342105197Ssam }; 3343105197Ssam 3344105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3345105197Ssam if (m == NULL) 3346105197Ssam goto fail; 3347105197Ssam result = m; 3348105197Ssam 3349105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3350105197Ssam m = NULL; 3351105197Ssam switch (dumporder[i]) { 3352105197Ssam case SADB_EXT_SA: 3353105197Ssam m = key_setsadbsa(sav); 3354105197Ssam if (!m) 3355105197Ssam goto fail; 3356105197Ssam break; 3357105197Ssam 3358105197Ssam case SADB_X_EXT_SA2: 3359105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3360105197Ssam sav->replay ? sav->replay->count : 0, 3361105197Ssam sav->sah->saidx.reqid); 3362105197Ssam if (!m) 3363105197Ssam goto fail; 3364105197Ssam break; 3365105197Ssam 3366105197Ssam case SADB_EXT_ADDRESS_SRC: 3367105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3368105197Ssam &sav->sah->saidx.src.sa, 3369105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3370105197Ssam if (!m) 3371105197Ssam goto fail; 3372105197Ssam break; 3373105197Ssam 3374105197Ssam case SADB_EXT_ADDRESS_DST: 3375105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3376105197Ssam &sav->sah->saidx.dst.sa, 3377105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3378105197Ssam if (!m) 3379105197Ssam goto fail; 3380105197Ssam break; 3381105197Ssam 3382105197Ssam case SADB_EXT_KEY_AUTH: 3383105197Ssam if (!sav->key_auth) 3384105197Ssam continue; 3385157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3386157123Sgnn if (!m) 3387157123Sgnn goto fail; 3388105197Ssam break; 3389105197Ssam 3390105197Ssam case SADB_EXT_KEY_ENCRYPT: 3391105197Ssam if (!sav->key_enc) 3392105197Ssam continue; 3393157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3394157123Sgnn if (!m) 3395157123Sgnn goto fail; 3396105197Ssam break; 3397105197Ssam 3398105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3399105197Ssam if (!sav->lft_c) 3400105197Ssam continue; 3401157123Sgnn m = key_setlifetime(sav->lft_c, 3402157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3403157123Sgnn if (!m) 3404157123Sgnn goto fail; 3405105197Ssam break; 3406105197Ssam 3407105197Ssam case SADB_EXT_LIFETIME_HARD: 3408105197Ssam if (!sav->lft_h) 3409105197Ssam continue; 3410157123Sgnn m = key_setlifetime(sav->lft_h, 3411157123Sgnn SADB_EXT_LIFETIME_HARD); 3412157123Sgnn if (!m) 3413157123Sgnn goto fail; 3414105197Ssam break; 3415105197Ssam 3416105197Ssam case SADB_EXT_LIFETIME_SOFT: 3417105197Ssam if (!sav->lft_s) 3418105197Ssam continue; 3419177554Sbz m = key_setlifetime(sav->lft_s, 3420157123Sgnn SADB_EXT_LIFETIME_SOFT); 3421157123Sgnn 3422157123Sgnn if (!m) 3423157123Sgnn goto fail; 3424105197Ssam break; 3425105197Ssam 3426105197Ssam case SADB_EXT_ADDRESS_PROXY: 3427105197Ssam case SADB_EXT_IDENTITY_SRC: 3428105197Ssam case SADB_EXT_IDENTITY_DST: 3429105197Ssam /* XXX: should we brought from SPD ? */ 3430105197Ssam case SADB_EXT_SENSITIVITY: 3431105197Ssam default: 3432105197Ssam continue; 3433105197Ssam } 3434105197Ssam 3435157123Sgnn if (!m) 3436105197Ssam goto fail; 3437105197Ssam if (tres) 3438105197Ssam m_cat(m, tres); 3439105197Ssam tres = m; 3440157123Sgnn 3441105197Ssam } 3442105197Ssam 3443105197Ssam m_cat(result, tres); 3444105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3445105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3446105197Ssam if (result == NULL) 3447105197Ssam goto fail; 3448105197Ssam } 3449105197Ssam 3450105197Ssam result->m_pkthdr.len = 0; 3451105197Ssam for (m = result; m; m = m->m_next) 3452105197Ssam result->m_pkthdr.len += m->m_len; 3453105197Ssam 3454105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3455105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3456105197Ssam 3457105197Ssam return result; 3458105197Ssam 3459105197Ssamfail: 3460105197Ssam m_freem(result); 3461105197Ssam m_freem(tres); 3462105197Ssam return NULL; 3463105197Ssam} 3464105197Ssam 3465105197Ssam/* 3466105197Ssam * set data into sadb_msg. 3467105197Ssam */ 3468105197Ssamstatic struct mbuf * 3469189004Srdivackykey_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3470189004Srdivacky pid_t pid, u_int16_t reserved) 3471105197Ssam{ 3472105197Ssam struct mbuf *m; 3473105197Ssam struct sadb_msg *p; 3474105197Ssam int len; 3475105197Ssam 3476105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3477105197Ssam if (len > MCLBYTES) 3478105197Ssam return NULL; 3479111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3480105197Ssam if (m && len > MHLEN) { 3481111119Simp MCLGET(m, M_DONTWAIT); 3482105197Ssam if ((m->m_flags & M_EXT) == 0) { 3483105197Ssam m_freem(m); 3484105197Ssam m = NULL; 3485105197Ssam } 3486105197Ssam } 3487105197Ssam if (!m) 3488105197Ssam return NULL; 3489105197Ssam m->m_pkthdr.len = m->m_len = len; 3490105197Ssam m->m_next = NULL; 3491105197Ssam 3492105197Ssam p = mtod(m, struct sadb_msg *); 3493105197Ssam 3494105197Ssam bzero(p, len); 3495105197Ssam p->sadb_msg_version = PF_KEY_V2; 3496105197Ssam p->sadb_msg_type = type; 3497105197Ssam p->sadb_msg_errno = 0; 3498105197Ssam p->sadb_msg_satype = satype; 3499105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3500105197Ssam p->sadb_msg_reserved = reserved; 3501105197Ssam p->sadb_msg_seq = seq; 3502105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3503105197Ssam 3504105197Ssam return m; 3505105197Ssam} 3506105197Ssam 3507105197Ssam/* 3508105197Ssam * copy secasvar data into sadb_address. 3509105197Ssam */ 3510105197Ssamstatic struct mbuf * 3511105197Ssamkey_setsadbsa(sav) 3512105197Ssam struct secasvar *sav; 3513105197Ssam{ 3514105197Ssam struct mbuf *m; 3515105197Ssam struct sadb_sa *p; 3516105197Ssam int len; 3517105197Ssam 3518105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3519105197Ssam m = key_alloc_mbuf(len); 3520105197Ssam if (!m || m->m_next) { /*XXX*/ 3521105197Ssam if (m) 3522105197Ssam m_freem(m); 3523105197Ssam return NULL; 3524105197Ssam } 3525105197Ssam 3526105197Ssam p = mtod(m, struct sadb_sa *); 3527105197Ssam 3528105197Ssam bzero(p, len); 3529105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3530105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3531105197Ssam p->sadb_sa_spi = sav->spi; 3532105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3533105197Ssam p->sadb_sa_state = sav->state; 3534105197Ssam p->sadb_sa_auth = sav->alg_auth; 3535105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3536105197Ssam p->sadb_sa_flags = sav->flags; 3537105197Ssam 3538105197Ssam return m; 3539105197Ssam} 3540105197Ssam 3541105197Ssam/* 3542105197Ssam * set data into sadb_address. 3543105197Ssam */ 3544105197Ssamstatic struct mbuf * 3545189004Srdivackykey_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3546105197Ssam{ 3547105197Ssam struct mbuf *m; 3548105197Ssam struct sadb_address *p; 3549105197Ssam size_t len; 3550105197Ssam 3551105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3552105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3553105197Ssam m = key_alloc_mbuf(len); 3554105197Ssam if (!m || m->m_next) { /*XXX*/ 3555105197Ssam if (m) 3556105197Ssam m_freem(m); 3557105197Ssam return NULL; 3558105197Ssam } 3559105197Ssam 3560105197Ssam p = mtod(m, struct sadb_address *); 3561105197Ssam 3562105197Ssam bzero(p, len); 3563105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3564105197Ssam p->sadb_address_exttype = exttype; 3565105197Ssam p->sadb_address_proto = ul_proto; 3566105197Ssam if (prefixlen == FULLMASK) { 3567105197Ssam switch (saddr->sa_family) { 3568105197Ssam case AF_INET: 3569105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3570105197Ssam break; 3571105197Ssam case AF_INET6: 3572105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3573105197Ssam break; 3574105197Ssam default: 3575105197Ssam ; /*XXX*/ 3576105197Ssam } 3577105197Ssam } 3578105197Ssam p->sadb_address_prefixlen = prefixlen; 3579105197Ssam p->sadb_address_reserved = 0; 3580105197Ssam 3581105197Ssam bcopy(saddr, 3582105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3583105197Ssam saddr->sa_len); 3584105197Ssam 3585105197Ssam return m; 3586105197Ssam} 3587105197Ssam 3588105197Ssam/* 3589105197Ssam * set data into sadb_x_sa2. 3590105197Ssam */ 3591105197Ssamstatic struct mbuf * 3592189004Srdivackykey_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3593105197Ssam{ 3594105197Ssam struct mbuf *m; 3595105197Ssam struct sadb_x_sa2 *p; 3596105197Ssam size_t len; 3597105197Ssam 3598105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3599105197Ssam m = key_alloc_mbuf(len); 3600105197Ssam if (!m || m->m_next) { /*XXX*/ 3601105197Ssam if (m) 3602105197Ssam m_freem(m); 3603105197Ssam return NULL; 3604105197Ssam } 3605105197Ssam 3606105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3607105197Ssam 3608105197Ssam bzero(p, len); 3609105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3610105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3611105197Ssam p->sadb_x_sa2_mode = mode; 3612105197Ssam p->sadb_x_sa2_reserved1 = 0; 3613105197Ssam p->sadb_x_sa2_reserved2 = 0; 3614105197Ssam p->sadb_x_sa2_sequence = seq; 3615105197Ssam p->sadb_x_sa2_reqid = reqid; 3616105197Ssam 3617105197Ssam return m; 3618105197Ssam} 3619105197Ssam 3620105197Ssam/* 3621105197Ssam * set data into sadb_x_policy 3622105197Ssam */ 3623105197Ssamstatic struct mbuf * 3624189004Srdivackykey_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3625105197Ssam{ 3626105197Ssam struct mbuf *m; 3627105197Ssam struct sadb_x_policy *p; 3628105197Ssam size_t len; 3629105197Ssam 3630105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3631105197Ssam m = key_alloc_mbuf(len); 3632105197Ssam if (!m || m->m_next) { /*XXX*/ 3633105197Ssam if (m) 3634105197Ssam m_freem(m); 3635105197Ssam return NULL; 3636105197Ssam } 3637105197Ssam 3638105197Ssam p = mtod(m, struct sadb_x_policy *); 3639105197Ssam 3640105197Ssam bzero(p, len); 3641105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3642105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3643105197Ssam p->sadb_x_policy_type = type; 3644105197Ssam p->sadb_x_policy_dir = dir; 3645105197Ssam p->sadb_x_policy_id = id; 3646105197Ssam 3647105197Ssam return m; 3648105197Ssam} 3649105197Ssam 3650105197Ssam/* %%% utilities */ 3651157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3652157123Sgnn * of the kernel's key structures (seckey). 3653157123Sgnn * 3654157123Sgnn * IN: pointer to the src 3655157123Sgnn * OUT: NULL no more memory 3656105197Ssam */ 3657157123Sgnnstruct seckey * 3658157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3659157123Sgnn struct malloc_type *type) 3660105197Ssam{ 3661183550Szec INIT_VNET_IPSEC(curvnet); 3662157123Sgnn struct seckey *dst; 3663157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3664157123Sgnn if (dst != NULL) { 3665157123Sgnn dst->bits = src->sadb_key_bits; 3666157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3667157123Sgnn if (dst->key_data != NULL) { 3668157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3669157123Sgnn dst->key_data, len); 3670157123Sgnn } else { 3671157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3672157123Sgnn __func__)); 3673157123Sgnn free(dst, type); 3674157123Sgnn dst = NULL; 3675157123Sgnn } 3676157123Sgnn } else { 3677157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3678157123Sgnn __func__)); 3679105197Ssam 3680157123Sgnn } 3681157123Sgnn return dst; 3682157123Sgnn} 3683157123Sgnn 3684157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3685157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3686157123Sgnn * 3687157123Sgnn * IN: pointer to the destination, source and malloc type 3688157123Sgnn * OUT: NULL, no more memory 3689157123Sgnn */ 3690157123Sgnn 3691157123Sgnnstatic struct seclifetime * 3692157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3693157123Sgnn struct malloc_type *type) 3694157123Sgnn{ 3695183550Szec INIT_VNET_IPSEC(curvnet); 3696157123Sgnn struct seclifetime *dst = NULL; 3697157123Sgnn 3698157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3699157123Sgnn type, M_NOWAIT); 3700157123Sgnn if (dst == NULL) { 3701119643Ssam /* XXX counter */ 3702120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3703157123Sgnn } else { 3704157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3705157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3706157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3707157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3708157123Sgnn } 3709157123Sgnn return dst; 3710105197Ssam} 3711105197Ssam 3712105197Ssam/* compare my own address 3713105197Ssam * OUT: 1: true, i.e. my address. 3714105197Ssam * 0: false 3715105197Ssam */ 3716105197Ssamint 3717105197Ssamkey_ismyaddr(sa) 3718105197Ssam struct sockaddr *sa; 3719105197Ssam{ 3720105197Ssam#ifdef INET 3721183550Szec INIT_VNET_INET(curvnet); 3722105197Ssam struct sockaddr_in *sin; 3723105197Ssam struct in_ifaddr *ia; 3724105197Ssam#endif 3725105197Ssam 3726120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3727105197Ssam 3728105197Ssam switch (sa->sa_family) { 3729105197Ssam#ifdef INET 3730105197Ssam case AF_INET: 3731105197Ssam sin = (struct sockaddr_in *)sa; 3732181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3733105197Ssam ia = ia->ia_link.tqe_next) 3734105197Ssam { 3735105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3736105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3737105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3738105197Ssam { 3739105197Ssam return 1; 3740105197Ssam } 3741105197Ssam } 3742105197Ssam break; 3743105197Ssam#endif 3744105197Ssam#ifdef INET6 3745105197Ssam case AF_INET6: 3746105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3747105197Ssam#endif 3748105197Ssam } 3749105197Ssam 3750105197Ssam return 0; 3751105197Ssam} 3752105197Ssam 3753105197Ssam#ifdef INET6 3754105197Ssam/* 3755105197Ssam * compare my own address for IPv6. 3756105197Ssam * 1: ours 3757105197Ssam * 0: other 3758105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3759105197Ssam */ 3760105197Ssam#include <netinet6/in6_var.h> 3761105197Ssam 3762105197Ssamstatic int 3763105197Ssamkey_ismyaddr6(sin6) 3764105197Ssam struct sockaddr_in6 *sin6; 3765105197Ssam{ 3766183550Szec INIT_VNET_INET6(curvnet); 3767105197Ssam struct in6_ifaddr *ia; 3768105197Ssam struct in6_multi *in6m; 3769105197Ssam 3770181803Sbz for (ia = V_in6_ifaddr; ia; ia = ia->ia_next) { 3771105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3772105197Ssam (struct sockaddr *)&ia->ia_addr, 0) == 0) 3773105197Ssam return 1; 3774105197Ssam 3775105197Ssam /* 3776105197Ssam * XXX Multicast 3777105197Ssam * XXX why do we care about multlicast here while we don't care 3778105197Ssam * about IPv4 multicast?? 3779105197Ssam * XXX scope 3780105197Ssam */ 3781105197Ssam in6m = NULL; 3782105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3783105197Ssam if (in6m) 3784105197Ssam return 1; 3785105197Ssam } 3786105197Ssam 3787105197Ssam /* loopback, just for safety */ 3788105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3789105197Ssam return 1; 3790105197Ssam 3791105197Ssam return 0; 3792105197Ssam} 3793105197Ssam#endif /*INET6*/ 3794105197Ssam 3795105197Ssam/* 3796105197Ssam * compare two secasindex structure. 3797105197Ssam * flag can specify to compare 2 saidxes. 3798105197Ssam * compare two secasindex structure without both mode and reqid. 3799105197Ssam * don't compare port. 3800105197Ssam * IN: 3801105197Ssam * saidx0: source, it can be in SAD. 3802105197Ssam * saidx1: object. 3803105197Ssam * OUT: 3804105197Ssam * 1 : equal 3805105197Ssam * 0 : not equal 3806105197Ssam */ 3807105197Ssamstatic int 3808105197Ssamkey_cmpsaidx( 3809105197Ssam const struct secasindex *saidx0, 3810105197Ssam const struct secasindex *saidx1, 3811105197Ssam int flag) 3812105197Ssam{ 3813105197Ssam /* sanity */ 3814105197Ssam if (saidx0 == NULL && saidx1 == NULL) 3815105197Ssam return 1; 3816105197Ssam 3817105197Ssam if (saidx0 == NULL || saidx1 == NULL) 3818105197Ssam return 0; 3819105197Ssam 3820105197Ssam if (saidx0->proto != saidx1->proto) 3821105197Ssam return 0; 3822105197Ssam 3823105197Ssam if (flag == CMP_EXACTLY) { 3824105197Ssam if (saidx0->mode != saidx1->mode) 3825105197Ssam return 0; 3826105197Ssam if (saidx0->reqid != saidx1->reqid) 3827105197Ssam return 0; 3828105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3829105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3830105197Ssam return 0; 3831105197Ssam } else { 3832105197Ssam 3833105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3834105197Ssam if (flag == CMP_MODE_REQID 3835105197Ssam ||flag == CMP_REQID) { 3836105197Ssam /* 3837105197Ssam * If reqid of SPD is non-zero, unique SA is required. 3838105197Ssam * The result must be of same reqid in this case. 3839105197Ssam */ 3840105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3841105197Ssam return 0; 3842105197Ssam } 3843105197Ssam 3844105197Ssam if (flag == CMP_MODE_REQID) { 3845105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 3846105197Ssam && saidx0->mode != saidx1->mode) 3847105197Ssam return 0; 3848105197Ssam } 3849105197Ssam 3850105197Ssam if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3851105197Ssam return 0; 3852105197Ssam } 3853105197Ssam if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 3854105197Ssam return 0; 3855105197Ssam } 3856105197Ssam } 3857105197Ssam 3858105197Ssam return 1; 3859105197Ssam} 3860105197Ssam 3861105197Ssam/* 3862105197Ssam * compare two secindex structure exactly. 3863105197Ssam * IN: 3864105197Ssam * spidx0: source, it is often in SPD. 3865105197Ssam * spidx1: object, it is often from PFKEY message. 3866105197Ssam * OUT: 3867105197Ssam * 1 : equal 3868105197Ssam * 0 : not equal 3869105197Ssam */ 3870105197Ssamstatic int 3871105197Ssamkey_cmpspidx_exactly( 3872105197Ssam struct secpolicyindex *spidx0, 3873105197Ssam struct secpolicyindex *spidx1) 3874105197Ssam{ 3875105197Ssam /* sanity */ 3876105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3877105197Ssam return 1; 3878105197Ssam 3879105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3880105197Ssam return 0; 3881105197Ssam 3882105197Ssam if (spidx0->prefs != spidx1->prefs 3883105197Ssam || spidx0->prefd != spidx1->prefd 3884105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 3885105197Ssam return 0; 3886105197Ssam 3887105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 3888105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 3889105197Ssam} 3890105197Ssam 3891105197Ssam/* 3892105197Ssam * compare two secindex structure with mask. 3893105197Ssam * IN: 3894105197Ssam * spidx0: source, it is often in SPD. 3895105197Ssam * spidx1: object, it is often from IP header. 3896105197Ssam * OUT: 3897105197Ssam * 1 : equal 3898105197Ssam * 0 : not equal 3899105197Ssam */ 3900105197Ssamstatic int 3901105197Ssamkey_cmpspidx_withmask( 3902105197Ssam struct secpolicyindex *spidx0, 3903105197Ssam struct secpolicyindex *spidx1) 3904105197Ssam{ 3905105197Ssam /* sanity */ 3906105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3907105197Ssam return 1; 3908105197Ssam 3909105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3910105197Ssam return 0; 3911105197Ssam 3912105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 3913105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 3914105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 3915105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 3916105197Ssam return 0; 3917105197Ssam 3918105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 3919105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 3920105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 3921105197Ssam return 0; 3922105197Ssam 3923105197Ssam switch (spidx0->src.sa.sa_family) { 3924105197Ssam case AF_INET: 3925105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 3926105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 3927105197Ssam return 0; 3928105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 3929105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 3930105197Ssam return 0; 3931105197Ssam break; 3932105197Ssam case AF_INET6: 3933105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 3934105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 3935105197Ssam return 0; 3936105197Ssam /* 3937105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3938105197Ssam * as a wildcard scope, which matches any scope zone ID. 3939105197Ssam */ 3940105197Ssam if (spidx0->src.sin6.sin6_scope_id && 3941105197Ssam spidx1->src.sin6.sin6_scope_id && 3942105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 3943105197Ssam return 0; 3944105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 3945105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 3946105197Ssam return 0; 3947105197Ssam break; 3948105197Ssam default: 3949105197Ssam /* XXX */ 3950105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 3951105197Ssam return 0; 3952105197Ssam break; 3953105197Ssam } 3954105197Ssam 3955105197Ssam switch (spidx0->dst.sa.sa_family) { 3956105197Ssam case AF_INET: 3957105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 3958105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 3959105197Ssam return 0; 3960105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 3961105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 3962105197Ssam return 0; 3963105197Ssam break; 3964105197Ssam case AF_INET6: 3965105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 3966105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 3967105197Ssam return 0; 3968105197Ssam /* 3969105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3970105197Ssam * as a wildcard scope, which matches any scope zone ID. 3971105197Ssam */ 3972130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 3973130928Sbms spidx1->dst.sin6.sin6_scope_id && 3974105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 3975105197Ssam return 0; 3976105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 3977105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 3978105197Ssam return 0; 3979105197Ssam break; 3980105197Ssam default: 3981105197Ssam /* XXX */ 3982105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 3983105197Ssam return 0; 3984105197Ssam break; 3985105197Ssam } 3986105197Ssam 3987105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 3988105197Ssam 3989105197Ssam return 1; 3990105197Ssam} 3991105197Ssam 3992105197Ssam/* returns 0 on match */ 3993105197Ssamstatic int 3994105197Ssamkey_sockaddrcmp( 3995105197Ssam const struct sockaddr *sa1, 3996105197Ssam const struct sockaddr *sa2, 3997105197Ssam int port) 3998105197Ssam{ 3999105197Ssam#ifdef satosin 4000105197Ssam#undef satosin 4001105197Ssam#endif 4002105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4003105197Ssam#ifdef satosin6 4004105197Ssam#undef satosin6 4005105197Ssam#endif 4006105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4007105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4008105197Ssam return 1; 4009105197Ssam 4010105197Ssam switch (sa1->sa_family) { 4011105197Ssam case AF_INET: 4012105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4013105197Ssam return 1; 4014105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4015105197Ssam satosin(sa2)->sin_addr.s_addr) { 4016105197Ssam return 1; 4017105197Ssam } 4018105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4019105197Ssam return 1; 4020105197Ssam break; 4021105197Ssam case AF_INET6: 4022105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4023105197Ssam return 1; /*EINVAL*/ 4024105197Ssam if (satosin6(sa1)->sin6_scope_id != 4025105197Ssam satosin6(sa2)->sin6_scope_id) { 4026105197Ssam return 1; 4027105197Ssam } 4028105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4029105197Ssam &satosin6(sa2)->sin6_addr)) { 4030105197Ssam return 1; 4031105197Ssam } 4032105197Ssam if (port && 4033105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4034105197Ssam return 1; 4035105197Ssam } 4036170120Sbz break; 4037105197Ssam default: 4038105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4039105197Ssam return 1; 4040105197Ssam break; 4041105197Ssam } 4042105197Ssam 4043105197Ssam return 0; 4044105197Ssam#undef satosin 4045105197Ssam#undef satosin6 4046105197Ssam} 4047105197Ssam 4048105197Ssam/* 4049105197Ssam * compare two buffers with mask. 4050105197Ssam * IN: 4051105197Ssam * addr1: source 4052105197Ssam * addr2: object 4053105197Ssam * bits: Number of bits to compare 4054105197Ssam * OUT: 4055105197Ssam * 1 : equal 4056105197Ssam * 0 : not equal 4057105197Ssam */ 4058105197Ssamstatic int 4059105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4060105197Ssam{ 4061105197Ssam const unsigned char *p1 = a1; 4062105197Ssam const unsigned char *p2 = a2; 4063105197Ssam 4064105197Ssam /* XXX: This could be considerably faster if we compare a word 4065105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4066105197Ssam 4067105197Ssam /* Handle null pointers */ 4068105197Ssam if (p1 == NULL || p2 == NULL) 4069105197Ssam return (p1 == p2); 4070105197Ssam 4071105197Ssam while (bits >= 8) { 4072105197Ssam if (*p1++ != *p2++) 4073105197Ssam return 0; 4074105197Ssam bits -= 8; 4075105197Ssam } 4076105197Ssam 4077105197Ssam if (bits > 0) { 4078105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4079105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4080105197Ssam return 0; 4081105197Ssam } 4082105197Ssam return 1; /* Match! */ 4083105197Ssam} 4084105197Ssam 4085119643Ssamstatic void 4086119643Ssamkey_flush_spd(time_t now) 4087105197Ssam{ 4088183550Szec INIT_VNET_IPSEC(curvnet); 4089120585Ssam static u_int16_t sptree_scangen = 0; 4090120585Ssam u_int16_t gen = sptree_scangen++; 4091120585Ssam struct secpolicy *sp; 4092105197Ssam u_int dir; 4093105197Ssam 4094105197Ssam /* SPD */ 4095105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4096120585Ssamrestart: 4097120585Ssam SPTREE_LOCK(); 4098181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4099120585Ssam if (sp->scangen == gen) /* previously handled */ 4100120585Ssam continue; 4101120585Ssam sp->scangen = gen; 4102105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) { 4103120585Ssam /* NB: clean entries created by key_spdflush */ 4104120585Ssam SPTREE_UNLOCK(); 4105105197Ssam KEY_FREESP(&sp); 4106120585Ssam goto restart; 4107105197Ssam } 4108105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4109105197Ssam continue; 4110105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4111105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4112105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4113120585Ssam SPTREE_UNLOCK(); 4114105197Ssam key_spdexpire(sp); 4115120585Ssam KEY_FREESP(&sp); 4116120585Ssam goto restart; 4117105197Ssam } 4118105197Ssam } 4119120585Ssam SPTREE_UNLOCK(); 4120105197Ssam } 4121119643Ssam} 4122105197Ssam 4123119643Ssamstatic void 4124119643Ssamkey_flush_sad(time_t now) 4125119643Ssam{ 4126183550Szec INIT_VNET_IPSEC(curvnet); 4127105197Ssam struct secashead *sah, *nextsah; 4128105197Ssam struct secasvar *sav, *nextsav; 4129105197Ssam 4130119643Ssam /* SAD */ 4131120585Ssam SAHTREE_LOCK(); 4132181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4133105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4134105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4135105197Ssam key_delsah(sah); 4136105197Ssam continue; 4137105197Ssam } 4138105197Ssam 4139105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4140120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4141190071Svanhu /* Need to also check refcnt for a larval SA ??? */ 4142181803Sbz if (now - sav->created > V_key_larval_lifetime) 4143105197Ssam KEY_FREESAV(&sav); 4144105197Ssam } 4145105197Ssam 4146105197Ssam /* 4147105197Ssam * check MATURE entry to start to send expire message 4148105197Ssam * whether or not. 4149105197Ssam */ 4150120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4151105197Ssam /* we don't need to check. */ 4152105197Ssam if (sav->lft_s == NULL) 4153105197Ssam continue; 4154105197Ssam 4155105197Ssam /* sanity check */ 4156105197Ssam if (sav->lft_c == NULL) { 4157120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4158120585Ssam "time, why?\n", __func__)); 4159105197Ssam continue; 4160105197Ssam } 4161105197Ssam 4162105197Ssam /* check SOFT lifetime */ 4163157123Sgnn if (sav->lft_s->addtime != 0 && 4164157123Sgnn now - sav->created > sav->lft_s->addtime) { 4165189406Svanhu key_sa_chgstate(sav, SADB_SASTATE_DYING); 4166190075Svanhu /* 4167190323Svanhu * Actually, only send expire message if 4168190323Svanhu * SA has been used, as it was done before, 4169190323Svanhu * but should we always send such message, 4170190323Svanhu * and let IKE daemon decide if it should be 4171190323Svanhu * renegotiated or not ? 4172190323Svanhu * XXX expire message will actually NOT be 4173190323Svanhu * sent if SA is only used after soft 4174190323Svanhu * lifetime has been reached, see below 4175190323Svanhu * (DYING state) 4176105197Ssam */ 4177189406Svanhu if (sav->lft_c->usetime != 0) 4178105197Ssam key_expire(sav); 4179105197Ssam } 4180105197Ssam /* check SOFT lifetime by bytes */ 4181105197Ssam /* 4182105197Ssam * XXX I don't know the way to delete this SA 4183105197Ssam * when new SA is installed. Caution when it's 4184105197Ssam * installed too big lifetime by time. 4185105197Ssam */ 4186157123Sgnn else if (sav->lft_s->bytes != 0 && 4187157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4188105197Ssam 4189105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4190105197Ssam /* 4191105197Ssam * XXX If we keep to send expire 4192105197Ssam * message in the status of 4193105197Ssam * DYING. Do remove below code. 4194105197Ssam */ 4195105197Ssam key_expire(sav); 4196105197Ssam } 4197105197Ssam } 4198105197Ssam 4199105197Ssam /* check DYING entry to change status to DEAD. */ 4200120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4201105197Ssam /* we don't need to check. */ 4202105197Ssam if (sav->lft_h == NULL) 4203105197Ssam continue; 4204105197Ssam 4205105197Ssam /* sanity check */ 4206105197Ssam if (sav->lft_c == NULL) { 4207120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4208120585Ssam "time, why?\n", __func__)); 4209105197Ssam continue; 4210105197Ssam } 4211105197Ssam 4212157123Sgnn if (sav->lft_h->addtime != 0 && 4213157123Sgnn now - sav->created > sav->lft_h->addtime) { 4214105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4215105197Ssam KEY_FREESAV(&sav); 4216105197Ssam } 4217105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4218105197Ssam else if (sav->lft_s != NULL 4219157123Sgnn && sav->lft_s->addtime != 0 4220157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4221105197Ssam /* 4222105197Ssam * XXX: should be checked to be 4223105197Ssam * installed the valid SA. 4224105197Ssam */ 4225105197Ssam 4226105197Ssam /* 4227105197Ssam * If there is no SA then sending 4228105197Ssam * expire message. 4229105197Ssam */ 4230105197Ssam key_expire(sav); 4231105197Ssam } 4232105197Ssam#endif 4233105197Ssam /* check HARD lifetime by bytes */ 4234157123Sgnn else if (sav->lft_h->bytes != 0 && 4235157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4236105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4237105197Ssam KEY_FREESAV(&sav); 4238105197Ssam } 4239105197Ssam } 4240105197Ssam 4241105197Ssam /* delete entry in DEAD */ 4242120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4243105197Ssam /* sanity check */ 4244105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4245120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4246120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4247120585Ssam __func__, 4248105197Ssam SADB_SASTATE_DEAD, sav->state)); 4249105197Ssam } 4250105197Ssam /* 4251105197Ssam * do not call key_freesav() here. 4252105197Ssam * sav should already be freed, and sav->refcnt 4253105197Ssam * shows other references to sav 4254105197Ssam * (such as from SPD). 4255105197Ssam */ 4256105197Ssam } 4257105197Ssam } 4258120585Ssam SAHTREE_UNLOCK(); 4259119643Ssam} 4260105197Ssam 4261119643Ssamstatic void 4262119643Ssamkey_flush_acq(time_t now) 4263119643Ssam{ 4264183550Szec INIT_VNET_IPSEC(curvnet); 4265105197Ssam struct secacq *acq, *nextacq; 4266105197Ssam 4267119643Ssam /* ACQ tree */ 4268120585Ssam ACQ_LOCK(); 4269181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4270105197Ssam nextacq = LIST_NEXT(acq, chain); 4271181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4272105197Ssam && __LIST_CHAINED(acq)) { 4273105197Ssam LIST_REMOVE(acq, chain); 4274119643Ssam free(acq, M_IPSEC_SAQ); 4275105197Ssam } 4276105197Ssam } 4277120585Ssam ACQ_UNLOCK(); 4278119643Ssam} 4279105197Ssam 4280119643Ssamstatic void 4281119643Ssamkey_flush_spacq(time_t now) 4282119643Ssam{ 4283183550Szec INIT_VNET_IPSEC(curvnet); 4284105197Ssam struct secspacq *acq, *nextacq; 4285105197Ssam 4286119643Ssam /* SP ACQ tree */ 4287120585Ssam SPACQ_LOCK(); 4288181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4289105197Ssam nextacq = LIST_NEXT(acq, chain); 4290181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4291105197Ssam && __LIST_CHAINED(acq)) { 4292105197Ssam LIST_REMOVE(acq, chain); 4293119643Ssam free(acq, M_IPSEC_SAQ); 4294105197Ssam } 4295105197Ssam } 4296120585Ssam SPACQ_UNLOCK(); 4297119643Ssam} 4298105197Ssam 4299119643Ssam/* 4300119643Ssam * time handler. 4301119643Ssam * scanning SPD and SAD to check status for each entries, 4302119643Ssam * and do to remove or to expire. 4303119643Ssam * XXX: year 2038 problem may remain. 4304119643Ssam */ 4305119643Ssamvoid 4306119643Ssamkey_timehandler(void) 4307119643Ssam{ 4308183550Szec VNET_ITERATOR_DECL(vnet_iter); 4309119643Ssam time_t now = time_second; 4310105197Ssam 4311185348Szec VNET_LIST_RLOCK(); 4312183550Szec VNET_FOREACH(vnet_iter) { 4313183550Szec CURVNET_SET(vnet_iter); 4314183550Szec key_flush_spd(now); 4315183550Szec key_flush_sad(now); 4316183550Szec key_flush_acq(now); 4317183550Szec key_flush_spacq(now); 4318183550Szec CURVNET_RESTORE(); 4319183550Szec } 4320185348Szec VNET_LIST_RUNLOCK(); 4321119643Ssam 4322105197Ssam#ifndef IPSEC_DEBUG2 4323105197Ssam /* do exchange to tick time !! */ 4324105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4325105197Ssam#endif /* IPSEC_DEBUG2 */ 4326105197Ssam} 4327105197Ssam 4328105197Ssamu_long 4329105197Ssamkey_random() 4330105197Ssam{ 4331105197Ssam u_long value; 4332105197Ssam 4333105197Ssam key_randomfill(&value, sizeof(value)); 4334105197Ssam return value; 4335105197Ssam} 4336105197Ssam 4337105197Ssamvoid 4338105197Ssamkey_randomfill(p, l) 4339105197Ssam void *p; 4340105197Ssam size_t l; 4341105197Ssam{ 4342105197Ssam size_t n; 4343105197Ssam u_long v; 4344105197Ssam static int warn = 1; 4345105197Ssam 4346105197Ssam n = 0; 4347105197Ssam n = (size_t)read_random(p, (u_int)l); 4348105197Ssam /* last resort */ 4349105197Ssam while (n < l) { 4350105197Ssam v = random(); 4351105197Ssam bcopy(&v, (u_int8_t *)p + n, 4352105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4353105197Ssam n += sizeof(v); 4354105197Ssam 4355105197Ssam if (warn) { 4356105197Ssam printf("WARNING: pseudo-random number generator " 4357105197Ssam "used for IPsec processing\n"); 4358105197Ssam warn = 0; 4359105197Ssam } 4360105197Ssam } 4361105197Ssam} 4362105197Ssam 4363105197Ssam/* 4364105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4365105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4366105197Ssam * OUT: 4367105197Ssam * 0: invalid satype. 4368105197Ssam */ 4369105197Ssamstatic u_int16_t 4370189004Srdivackykey_satype2proto(u_int8_t satype) 4371105197Ssam{ 4372105197Ssam switch (satype) { 4373105197Ssam case SADB_SATYPE_UNSPEC: 4374105197Ssam return IPSEC_PROTO_ANY; 4375105197Ssam case SADB_SATYPE_AH: 4376105197Ssam return IPPROTO_AH; 4377105197Ssam case SADB_SATYPE_ESP: 4378105197Ssam return IPPROTO_ESP; 4379105197Ssam case SADB_X_SATYPE_IPCOMP: 4380105197Ssam return IPPROTO_IPCOMP; 4381125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4382125680Sbms return IPPROTO_TCP; 4383105197Ssam default: 4384105197Ssam return 0; 4385105197Ssam } 4386105197Ssam /* NOTREACHED */ 4387105197Ssam} 4388105197Ssam 4389105197Ssam/* 4390105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4391105197Ssam * OUT: 4392105197Ssam * 0: invalid protocol type. 4393105197Ssam */ 4394105197Ssamstatic u_int8_t 4395189004Srdivackykey_proto2satype(u_int16_t proto) 4396105197Ssam{ 4397105197Ssam switch (proto) { 4398105197Ssam case IPPROTO_AH: 4399105197Ssam return SADB_SATYPE_AH; 4400105197Ssam case IPPROTO_ESP: 4401105197Ssam return SADB_SATYPE_ESP; 4402105197Ssam case IPPROTO_IPCOMP: 4403105197Ssam return SADB_X_SATYPE_IPCOMP; 4404125680Sbms case IPPROTO_TCP: 4405125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4406105197Ssam default: 4407105197Ssam return 0; 4408105197Ssam } 4409105197Ssam /* NOTREACHED */ 4410105197Ssam} 4411105197Ssam 4412105197Ssam/* %%% PF_KEY */ 4413105197Ssam/* 4414105197Ssam * SADB_GETSPI processing is to receive 4415105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4416105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4417105197Ssam * tree with the status of LARVAL, and send 4418105197Ssam * <base, SA(*), address(SD)> 4419105197Ssam * to the IKMPd. 4420105197Ssam * 4421105197Ssam * IN: mhp: pointer to the pointer to each header. 4422105197Ssam * OUT: NULL if fail. 4423105197Ssam * other if success, return pointer to the message to send. 4424105197Ssam */ 4425105197Ssamstatic int 4426105197Ssamkey_getspi(so, m, mhp) 4427105197Ssam struct socket *so; 4428105197Ssam struct mbuf *m; 4429105197Ssam const struct sadb_msghdr *mhp; 4430105197Ssam{ 4431183550Szec INIT_VNET_IPSEC(curvnet); 4432105197Ssam struct sadb_address *src0, *dst0; 4433105197Ssam struct secasindex saidx; 4434105197Ssam struct secashead *newsah; 4435105197Ssam struct secasvar *newsav; 4436105197Ssam u_int8_t proto; 4437105197Ssam u_int32_t spi; 4438105197Ssam u_int8_t mode; 4439105197Ssam u_int32_t reqid; 4440105197Ssam int error; 4441105197Ssam 4442120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4443120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4444120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4445120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4446105197Ssam 4447105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4448105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4449120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4450120585Ssam __func__)); 4451105197Ssam return key_senderror(so, m, EINVAL); 4452105197Ssam } 4453105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4454105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4455120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4456120585Ssam __func__)); 4457105197Ssam return key_senderror(so, m, EINVAL); 4458105197Ssam } 4459105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4460105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4461105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4462105197Ssam } else { 4463105197Ssam mode = IPSEC_MODE_ANY; 4464105197Ssam reqid = 0; 4465105197Ssam } 4466105197Ssam 4467105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4468105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4469105197Ssam 4470105197Ssam /* map satype to proto */ 4471105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4472120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4473120585Ssam __func__)); 4474105197Ssam return key_senderror(so, m, EINVAL); 4475105197Ssam } 4476105197Ssam 4477105197Ssam /* make sure if port number is zero. */ 4478105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4479105197Ssam case AF_INET: 4480105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4481105197Ssam sizeof(struct sockaddr_in)) 4482105197Ssam return key_senderror(so, m, EINVAL); 4483105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4484105197Ssam break; 4485105197Ssam case AF_INET6: 4486105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4487105197Ssam sizeof(struct sockaddr_in6)) 4488105197Ssam return key_senderror(so, m, EINVAL); 4489105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4490105197Ssam break; 4491105197Ssam default: 4492105197Ssam ; /*???*/ 4493105197Ssam } 4494105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4495105197Ssam case AF_INET: 4496105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4497105197Ssam sizeof(struct sockaddr_in)) 4498105197Ssam return key_senderror(so, m, EINVAL); 4499105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4500105197Ssam break; 4501105197Ssam case AF_INET6: 4502105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4503105197Ssam sizeof(struct sockaddr_in6)) 4504105197Ssam return key_senderror(so, m, EINVAL); 4505105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4506105197Ssam break; 4507105197Ssam default: 4508105197Ssam ; /*???*/ 4509105197Ssam } 4510105197Ssam 4511105197Ssam /* XXX boundary check against sa_len */ 4512105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4513105197Ssam 4514105197Ssam /* SPI allocation */ 4515105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4516105197Ssam &saidx); 4517105197Ssam if (spi == 0) 4518105197Ssam return key_senderror(so, m, EINVAL); 4519105197Ssam 4520105197Ssam /* get a SA index */ 4521105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4522105197Ssam /* create a new SA index */ 4523105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4524120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4525105197Ssam return key_senderror(so, m, ENOBUFS); 4526105197Ssam } 4527105197Ssam } 4528105197Ssam 4529105197Ssam /* get a new SA */ 4530105197Ssam /* XXX rewrite */ 4531105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4532105197Ssam if (newsav == NULL) { 4533105197Ssam /* XXX don't free new SA index allocated in above. */ 4534105197Ssam return key_senderror(so, m, error); 4535105197Ssam } 4536105197Ssam 4537105197Ssam /* set spi */ 4538105197Ssam newsav->spi = htonl(spi); 4539105197Ssam 4540105197Ssam /* delete the entry in acqtree */ 4541105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4542105197Ssam struct secacq *acq; 4543105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4544105197Ssam /* reset counter in order to deletion by timehandler. */ 4545105197Ssam acq->created = time_second; 4546105197Ssam acq->count = 0; 4547105197Ssam } 4548105197Ssam } 4549105197Ssam 4550105197Ssam { 4551105197Ssam struct mbuf *n, *nn; 4552105197Ssam struct sadb_sa *m_sa; 4553105197Ssam struct sadb_msg *newmsg; 4554105197Ssam int off, len; 4555105197Ssam 4556105197Ssam /* create new sadb_msg to reply. */ 4557105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4558105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4559105197Ssam 4560111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4561105197Ssam if (len > MHLEN) { 4562111119Simp MCLGET(n, M_DONTWAIT); 4563105197Ssam if ((n->m_flags & M_EXT) == 0) { 4564105197Ssam m_freem(n); 4565105197Ssam n = NULL; 4566105197Ssam } 4567105197Ssam } 4568105197Ssam if (!n) 4569105197Ssam return key_senderror(so, m, ENOBUFS); 4570105197Ssam 4571105197Ssam n->m_len = len; 4572105197Ssam n->m_next = NULL; 4573105197Ssam off = 0; 4574105197Ssam 4575105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4576105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4577105197Ssam 4578105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4579105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4580105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4581105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4582105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4583105197Ssam 4584120585Ssam IPSEC_ASSERT(off == len, 4585120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4586105197Ssam 4587105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4588105197Ssam SADB_EXT_ADDRESS_DST); 4589105197Ssam if (!n->m_next) { 4590105197Ssam m_freem(n); 4591105197Ssam return key_senderror(so, m, ENOBUFS); 4592105197Ssam } 4593105197Ssam 4594105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4595105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4596105197Ssam if (n == NULL) 4597105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4598105197Ssam } 4599105197Ssam 4600105197Ssam n->m_pkthdr.len = 0; 4601105197Ssam for (nn = n; nn; nn = nn->m_next) 4602105197Ssam n->m_pkthdr.len += nn->m_len; 4603105197Ssam 4604105197Ssam newmsg = mtod(n, struct sadb_msg *); 4605105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4606105197Ssam newmsg->sadb_msg_errno = 0; 4607105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4608105197Ssam 4609105197Ssam m_freem(m); 4610105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4611105197Ssam } 4612105197Ssam} 4613105197Ssam 4614105197Ssam/* 4615105197Ssam * allocating new SPI 4616105197Ssam * called by key_getspi(). 4617105197Ssam * OUT: 4618105197Ssam * 0: failure. 4619105197Ssam * others: success. 4620105197Ssam */ 4621105197Ssamstatic u_int32_t 4622105197Ssamkey_do_getnewspi(spirange, saidx) 4623105197Ssam struct sadb_spirange *spirange; 4624105197Ssam struct secasindex *saidx; 4625105197Ssam{ 4626183550Szec INIT_VNET_IPSEC(curvnet); 4627105197Ssam u_int32_t newspi; 4628105197Ssam u_int32_t min, max; 4629181803Sbz int count = V_key_spi_trycnt; 4630105197Ssam 4631105197Ssam /* set spi range to allocate */ 4632105197Ssam if (spirange != NULL) { 4633105197Ssam min = spirange->sadb_spirange_min; 4634105197Ssam max = spirange->sadb_spirange_max; 4635105197Ssam } else { 4636181803Sbz min = V_key_spi_minval; 4637181803Sbz max = V_key_spi_maxval; 4638105197Ssam } 4639105197Ssam /* IPCOMP needs 2-byte SPI */ 4640105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4641105197Ssam u_int32_t t; 4642105197Ssam if (min >= 0x10000) 4643105197Ssam min = 0xffff; 4644105197Ssam if (max >= 0x10000) 4645105197Ssam max = 0xffff; 4646105197Ssam if (min > max) { 4647105197Ssam t = min; min = max; max = t; 4648105197Ssam } 4649105197Ssam } 4650105197Ssam 4651105197Ssam if (min == max) { 4652105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4653120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4654120585Ssam __func__, min)); 4655105197Ssam return 0; 4656105197Ssam } 4657105197Ssam 4658105197Ssam count--; /* taking one cost. */ 4659105197Ssam newspi = min; 4660105197Ssam 4661105197Ssam } else { 4662105197Ssam 4663105197Ssam /* init SPI */ 4664105197Ssam newspi = 0; 4665105197Ssam 4666105197Ssam /* when requesting to allocate spi ranged */ 4667105197Ssam while (count--) { 4668105197Ssam /* generate pseudo-random SPI value ranged. */ 4669105197Ssam newspi = min + (key_random() % (max - min + 1)); 4670105197Ssam 4671105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4672105197Ssam break; 4673105197Ssam } 4674105197Ssam 4675105197Ssam if (count == 0 || newspi == 0) { 4676120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4677120585Ssam __func__)); 4678105197Ssam return 0; 4679105197Ssam } 4680105197Ssam } 4681105197Ssam 4682105197Ssam /* statistics */ 4683105197Ssam keystat.getspi_count = 4684181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4685105197Ssam 4686105197Ssam return newspi; 4687105197Ssam} 4688105197Ssam 4689105197Ssam/* 4690105197Ssam * SADB_UPDATE processing 4691105197Ssam * receive 4692105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4693105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4694105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4695105197Ssam * and send 4696105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4697105197Ssam * (identity(SD),) (sensitivity)> 4698105197Ssam * to the ikmpd. 4699105197Ssam * 4700105197Ssam * m will always be freed. 4701105197Ssam */ 4702105197Ssamstatic int 4703105197Ssamkey_update(so, m, mhp) 4704105197Ssam struct socket *so; 4705105197Ssam struct mbuf *m; 4706105197Ssam const struct sadb_msghdr *mhp; 4707105197Ssam{ 4708183550Szec INIT_VNET_IPSEC(curvnet); 4709105197Ssam struct sadb_sa *sa0; 4710105197Ssam struct sadb_address *src0, *dst0; 4711105197Ssam struct secasindex saidx; 4712105197Ssam struct secashead *sah; 4713105197Ssam struct secasvar *sav; 4714105197Ssam u_int16_t proto; 4715105197Ssam u_int8_t mode; 4716105197Ssam u_int32_t reqid; 4717105197Ssam int error; 4718105197Ssam 4719120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4720120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4721120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4722120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4723105197Ssam 4724105197Ssam /* map satype to proto */ 4725105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4726120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4727120585Ssam __func__)); 4728105197Ssam return key_senderror(so, m, EINVAL); 4729105197Ssam } 4730105197Ssam 4731105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4732105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4733105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4734105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4735105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4736105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4737105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4738105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4739105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4740105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4741105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4742120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4743120585Ssam __func__)); 4744105197Ssam return key_senderror(so, m, EINVAL); 4745105197Ssam } 4746105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4747105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4748105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4749120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4750120585Ssam __func__)); 4751105197Ssam return key_senderror(so, m, EINVAL); 4752105197Ssam } 4753105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4754105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4755105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4756105197Ssam } else { 4757105197Ssam mode = IPSEC_MODE_ANY; 4758105197Ssam reqid = 0; 4759105197Ssam } 4760105197Ssam /* XXX boundary checking for other extensions */ 4761105197Ssam 4762105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4763105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4764105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4765105197Ssam 4766105197Ssam /* XXX boundary check against sa_len */ 4767105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4768105197Ssam 4769105197Ssam /* get a SA header */ 4770105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 4771120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 4772105197Ssam return key_senderror(so, m, ENOENT); 4773105197Ssam } 4774105197Ssam 4775105197Ssam /* set spidx if there */ 4776105197Ssam /* XXX rewrite */ 4777105197Ssam error = key_setident(sah, m, mhp); 4778105197Ssam if (error) 4779105197Ssam return key_senderror(so, m, error); 4780105197Ssam 4781105197Ssam /* find a SA with sequence number. */ 4782105197Ssam#ifdef IPSEC_DOSEQCHECK 4783105197Ssam if (mhp->msg->sadb_msg_seq != 0 4784105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4785120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 4786120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 4787105197Ssam return key_senderror(so, m, ENOENT); 4788105197Ssam } 4789105197Ssam#else 4790120585Ssam SAHTREE_LOCK(); 4791120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 4792120585Ssam SAHTREE_UNLOCK(); 4793120585Ssam if (sav == NULL) { 4794120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 4795120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4796105197Ssam return key_senderror(so, m, EINVAL); 4797105197Ssam } 4798105197Ssam#endif 4799105197Ssam 4800105197Ssam /* validity check */ 4801105197Ssam if (sav->sah->saidx.proto != proto) { 4802120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 4803120585Ssam "(DB=%u param=%u)\n", __func__, 4804120585Ssam sav->sah->saidx.proto, proto)); 4805105197Ssam return key_senderror(so, m, EINVAL); 4806105197Ssam } 4807105197Ssam#ifdef IPSEC_DOSEQCHECK 4808105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 4809120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 4810120585Ssam __func__, 4811105197Ssam (u_int32_t)ntohl(sav->spi), 4812105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4813105197Ssam return key_senderror(so, m, EINVAL); 4814105197Ssam } 4815105197Ssam#endif 4816105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 4817120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 4818120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 4819105197Ssam return key_senderror(so, m, EINVAL); 4820105197Ssam } 4821105197Ssam 4822105197Ssam /* copy sav values */ 4823105197Ssam error = key_setsaval(sav, m, mhp); 4824105197Ssam if (error) { 4825105197Ssam KEY_FREESAV(&sav); 4826105197Ssam return key_senderror(so, m, error); 4827105197Ssam } 4828105197Ssam 4829105197Ssam /* check SA values to be mature. */ 4830105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 4831105197Ssam KEY_FREESAV(&sav); 4832105197Ssam return key_senderror(so, m, 0); 4833105197Ssam } 4834105197Ssam 4835105197Ssam { 4836105197Ssam struct mbuf *n; 4837105197Ssam 4838105197Ssam /* set msg buf from mhp */ 4839105197Ssam n = key_getmsgbuf_x1(m, mhp); 4840105197Ssam if (n == NULL) { 4841120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4842105197Ssam return key_senderror(so, m, ENOBUFS); 4843105197Ssam } 4844105197Ssam 4845105197Ssam m_freem(m); 4846105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4847105197Ssam } 4848105197Ssam} 4849105197Ssam 4850105197Ssam/* 4851105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 4852105197Ssam * only called by key_update(). 4853105197Ssam * OUT: 4854105197Ssam * NULL : not found 4855105197Ssam * others : found, pointer to a SA. 4856105197Ssam */ 4857105197Ssam#ifdef IPSEC_DOSEQCHECK 4858105197Ssamstatic struct secasvar * 4859105197Ssamkey_getsavbyseq(sah, seq) 4860105197Ssam struct secashead *sah; 4861105197Ssam u_int32_t seq; 4862105197Ssam{ 4863105197Ssam struct secasvar *sav; 4864105197Ssam u_int state; 4865105197Ssam 4866105197Ssam state = SADB_SASTATE_LARVAL; 4867105197Ssam 4868105197Ssam /* search SAD with sequence number ? */ 4869105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 4870105197Ssam 4871120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 4872105197Ssam 4873105197Ssam if (sav->seq == seq) { 4874158767Spjd sa_addref(sav); 4875105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 4876120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 4877120585Ssam __func__, sav->refcnt, sav)); 4878105197Ssam return sav; 4879105197Ssam } 4880105197Ssam } 4881105197Ssam 4882105197Ssam return NULL; 4883105197Ssam} 4884105197Ssam#endif 4885105197Ssam 4886105197Ssam/* 4887105197Ssam * SADB_ADD processing 4888108533Sschweikh * add an entry to SA database, when received 4889105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4890105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4891105197Ssam * from the ikmpd, 4892105197Ssam * and send 4893105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4894105197Ssam * (identity(SD),) (sensitivity)> 4895105197Ssam * to the ikmpd. 4896105197Ssam * 4897105197Ssam * IGNORE identity and sensitivity messages. 4898105197Ssam * 4899105197Ssam * m will always be freed. 4900105197Ssam */ 4901105197Ssamstatic int 4902105197Ssamkey_add(so, m, mhp) 4903105197Ssam struct socket *so; 4904105197Ssam struct mbuf *m; 4905105197Ssam const struct sadb_msghdr *mhp; 4906105197Ssam{ 4907183550Szec INIT_VNET_IPSEC(curvnet); 4908105197Ssam struct sadb_sa *sa0; 4909105197Ssam struct sadb_address *src0, *dst0; 4910105197Ssam struct secasindex saidx; 4911105197Ssam struct secashead *newsah; 4912105197Ssam struct secasvar *newsav; 4913105197Ssam u_int16_t proto; 4914105197Ssam u_int8_t mode; 4915105197Ssam u_int32_t reqid; 4916105197Ssam int error; 4917105197Ssam 4918120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4919120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4920120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4921120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4922105197Ssam 4923105197Ssam /* map satype to proto */ 4924105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4925120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4926120585Ssam __func__)); 4927105197Ssam return key_senderror(so, m, EINVAL); 4928105197Ssam } 4929105197Ssam 4930105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4931105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4932105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4933105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4934105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4935105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4936105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4937105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4938105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4939105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4940105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4941120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4942120585Ssam __func__)); 4943105197Ssam return key_senderror(so, m, EINVAL); 4944105197Ssam } 4945105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4946105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4947105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4948105197Ssam /* XXX need more */ 4949120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4950120585Ssam __func__)); 4951105197Ssam return key_senderror(so, m, EINVAL); 4952105197Ssam } 4953105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4954105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4955105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4956105197Ssam } else { 4957105197Ssam mode = IPSEC_MODE_ANY; 4958105197Ssam reqid = 0; 4959105197Ssam } 4960105197Ssam 4961105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4962105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4963105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4964105197Ssam 4965105197Ssam /* XXX boundary check against sa_len */ 4966105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4967105197Ssam 4968105197Ssam /* get a SA header */ 4969105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4970105197Ssam /* create a new SA header */ 4971105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4972120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4973105197Ssam return key_senderror(so, m, ENOBUFS); 4974105197Ssam } 4975105197Ssam } 4976105197Ssam 4977105197Ssam /* set spidx if there */ 4978105197Ssam /* XXX rewrite */ 4979105197Ssam error = key_setident(newsah, m, mhp); 4980105197Ssam if (error) { 4981105197Ssam return key_senderror(so, m, error); 4982105197Ssam } 4983105197Ssam 4984105197Ssam /* create new SA entry. */ 4985105197Ssam /* We can create new SA only if SPI is differenct. */ 4986120585Ssam SAHTREE_LOCK(); 4987120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 4988120585Ssam SAHTREE_UNLOCK(); 4989120585Ssam if (newsav != NULL) { 4990120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 4991105197Ssam return key_senderror(so, m, EEXIST); 4992105197Ssam } 4993105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4994105197Ssam if (newsav == NULL) { 4995105197Ssam return key_senderror(so, m, error); 4996105197Ssam } 4997105197Ssam 4998105197Ssam /* check SA values to be mature. */ 4999105197Ssam if ((error = key_mature(newsav)) != 0) { 5000105197Ssam KEY_FREESAV(&newsav); 5001105197Ssam return key_senderror(so, m, error); 5002105197Ssam } 5003105197Ssam 5004105197Ssam /* 5005105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5006105197Ssam * in the database on success. 5007105197Ssam */ 5008105197Ssam 5009105197Ssam { 5010105197Ssam struct mbuf *n; 5011105197Ssam 5012105197Ssam /* set msg buf from mhp */ 5013105197Ssam n = key_getmsgbuf_x1(m, mhp); 5014105197Ssam if (n == NULL) { 5015120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5016105197Ssam return key_senderror(so, m, ENOBUFS); 5017105197Ssam } 5018105197Ssam 5019105197Ssam m_freem(m); 5020105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5021105197Ssam } 5022105197Ssam} 5023105197Ssam 5024105197Ssam/* m is retained */ 5025105197Ssamstatic int 5026105197Ssamkey_setident(sah, m, mhp) 5027105197Ssam struct secashead *sah; 5028105197Ssam struct mbuf *m; 5029105197Ssam const struct sadb_msghdr *mhp; 5030105197Ssam{ 5031183550Szec INIT_VNET_IPSEC(curvnet); 5032105197Ssam const struct sadb_ident *idsrc, *iddst; 5033105197Ssam int idsrclen, iddstlen; 5034105197Ssam 5035120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5036120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5037120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5038120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5039105197Ssam 5040105197Ssam /* don't make buffer if not there */ 5041105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5042105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5043105197Ssam sah->idents = NULL; 5044105197Ssam sah->identd = NULL; 5045105197Ssam return 0; 5046105197Ssam } 5047105197Ssam 5048105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5049105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5050120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5051105197Ssam return EINVAL; 5052105197Ssam } 5053105197Ssam 5054105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5055105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5056105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5057105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5058105197Ssam 5059105197Ssam /* validity check */ 5060105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5061120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5062105197Ssam return EINVAL; 5063105197Ssam } 5064105197Ssam 5065105197Ssam switch (idsrc->sadb_ident_type) { 5066105197Ssam case SADB_IDENTTYPE_PREFIX: 5067105197Ssam case SADB_IDENTTYPE_FQDN: 5068105197Ssam case SADB_IDENTTYPE_USERFQDN: 5069105197Ssam default: 5070105197Ssam /* XXX do nothing */ 5071105197Ssam sah->idents = NULL; 5072105197Ssam sah->identd = NULL; 5073105197Ssam return 0; 5074105197Ssam } 5075105197Ssam 5076105197Ssam /* make structure */ 5077157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5078105197Ssam if (sah->idents == NULL) { 5079120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5080105197Ssam return ENOBUFS; 5081105197Ssam } 5082157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5083105197Ssam if (sah->identd == NULL) { 5084119643Ssam free(sah->idents, M_IPSEC_MISC); 5085105197Ssam sah->idents = NULL; 5086120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5087105197Ssam return ENOBUFS; 5088105197Ssam } 5089157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5090157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5091105197Ssam 5092157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5093157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5094157123Sgnn 5095105197Ssam return 0; 5096105197Ssam} 5097105197Ssam 5098105197Ssam/* 5099105197Ssam * m will not be freed on return. 5100105197Ssam * it is caller's responsibility to free the result. 5101105197Ssam */ 5102105197Ssamstatic struct mbuf * 5103105197Ssamkey_getmsgbuf_x1(m, mhp) 5104105197Ssam struct mbuf *m; 5105105197Ssam const struct sadb_msghdr *mhp; 5106105197Ssam{ 5107105197Ssam struct mbuf *n; 5108105197Ssam 5109120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5110120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5111120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5112105197Ssam 5113105197Ssam /* create new sadb_msg to reply. */ 5114105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5115105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5116105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5117105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5118105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5119105197Ssam if (!n) 5120105197Ssam return NULL; 5121105197Ssam 5122105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5123105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5124105197Ssam if (n == NULL) 5125105197Ssam return NULL; 5126105197Ssam } 5127105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5128105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5129105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5130105197Ssam 5131105197Ssam return n; 5132105197Ssam} 5133105197Ssam 5134105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5135105197Ssam const struct sadb_msghdr *, u_int16_t)); 5136105197Ssam 5137105197Ssam/* 5138105197Ssam * SADB_DELETE processing 5139105197Ssam * receive 5140105197Ssam * <base, SA(*), address(SD)> 5141105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5142105197Ssam * and send, 5143105197Ssam * <base, SA(*), address(SD)> 5144105197Ssam * to the ikmpd. 5145105197Ssam * 5146105197Ssam * m will always be freed. 5147105197Ssam */ 5148105197Ssamstatic int 5149105197Ssamkey_delete(so, m, mhp) 5150105197Ssam struct socket *so; 5151105197Ssam struct mbuf *m; 5152105197Ssam const struct sadb_msghdr *mhp; 5153105197Ssam{ 5154183550Szec INIT_VNET_IPSEC(curvnet); 5155105197Ssam struct sadb_sa *sa0; 5156105197Ssam struct sadb_address *src0, *dst0; 5157105197Ssam struct secasindex saidx; 5158105197Ssam struct secashead *sah; 5159105197Ssam struct secasvar *sav = NULL; 5160105197Ssam u_int16_t proto; 5161105197Ssam 5162120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5163120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5164120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5165120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5166105197Ssam 5167105197Ssam /* map satype to proto */ 5168105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5169120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5170120585Ssam __func__)); 5171105197Ssam return key_senderror(so, m, EINVAL); 5172105197Ssam } 5173105197Ssam 5174105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5175105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5176120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5177120585Ssam __func__)); 5178105197Ssam return key_senderror(so, m, EINVAL); 5179105197Ssam } 5180105197Ssam 5181105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5182105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5183120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5184120585Ssam __func__)); 5185105197Ssam return key_senderror(so, m, EINVAL); 5186105197Ssam } 5187105197Ssam 5188105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5189105197Ssam /* 5190105197Ssam * Caller wants us to delete all non-LARVAL SAs 5191105197Ssam * that match the src/dst. This is used during 5192105197Ssam * IKE INITIAL-CONTACT. 5193105197Ssam */ 5194120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5195105197Ssam return key_delete_all(so, m, mhp, proto); 5196105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5197120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5198120585Ssam __func__)); 5199105197Ssam return key_senderror(so, m, EINVAL); 5200105197Ssam } 5201105197Ssam 5202105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5203105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5204105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5205105197Ssam 5206105197Ssam /* XXX boundary check against sa_len */ 5207105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5208105197Ssam 5209105197Ssam /* get a SA header */ 5210120585Ssam SAHTREE_LOCK(); 5211181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5212105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5213105197Ssam continue; 5214105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5215105197Ssam continue; 5216105197Ssam 5217105197Ssam /* get a SA with SPI. */ 5218105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5219105197Ssam if (sav) 5220105197Ssam break; 5221105197Ssam } 5222105197Ssam if (sah == NULL) { 5223120585Ssam SAHTREE_UNLOCK(); 5224120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5225105197Ssam return key_senderror(so, m, ENOENT); 5226105197Ssam } 5227105197Ssam 5228105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5229120585Ssam SAHTREE_UNLOCK(); 5230105197Ssam KEY_FREESAV(&sav); 5231105197Ssam 5232105197Ssam { 5233105197Ssam struct mbuf *n; 5234105197Ssam struct sadb_msg *newmsg; 5235105197Ssam 5236105197Ssam /* create new sadb_msg to reply. */ 5237105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5238105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5239105197Ssam if (!n) 5240105197Ssam return key_senderror(so, m, ENOBUFS); 5241105197Ssam 5242105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5243105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5244105197Ssam if (n == NULL) 5245105197Ssam return key_senderror(so, m, ENOBUFS); 5246105197Ssam } 5247105197Ssam newmsg = mtod(n, struct sadb_msg *); 5248105197Ssam newmsg->sadb_msg_errno = 0; 5249105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5250105197Ssam 5251105197Ssam m_freem(m); 5252105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5253105197Ssam } 5254105197Ssam} 5255105197Ssam 5256105197Ssam/* 5257105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5258105197Ssam */ 5259105197Ssamstatic int 5260189004Srdivackykey_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5261189004Srdivacky u_int16_t proto) 5262105197Ssam{ 5263183550Szec INIT_VNET_IPSEC(curvnet); 5264105197Ssam struct sadb_address *src0, *dst0; 5265105197Ssam struct secasindex saidx; 5266105197Ssam struct secashead *sah; 5267105197Ssam struct secasvar *sav, *nextsav; 5268105197Ssam u_int stateidx, state; 5269105197Ssam 5270105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5271105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5272105197Ssam 5273105197Ssam /* XXX boundary check against sa_len */ 5274105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5275105197Ssam 5276120585Ssam SAHTREE_LOCK(); 5277181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5278105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5279105197Ssam continue; 5280105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5281105197Ssam continue; 5282105197Ssam 5283105197Ssam /* Delete all non-LARVAL SAs. */ 5284105197Ssam for (stateidx = 0; 5285185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5286105197Ssam stateidx++) { 5287185348Szec state = saorder_state_alive[stateidx]; 5288105197Ssam if (state == SADB_SASTATE_LARVAL) 5289105197Ssam continue; 5290105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5291105197Ssam sav != NULL; sav = nextsav) { 5292105197Ssam nextsav = LIST_NEXT(sav, chain); 5293105197Ssam /* sanity check */ 5294105197Ssam if (sav->state != state) { 5295120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5296120585Ssam "sav->state (queue %d SA %d)\n", 5297120585Ssam __func__, state, sav->state)); 5298105197Ssam continue; 5299105197Ssam } 5300105197Ssam 5301105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5302105197Ssam KEY_FREESAV(&sav); 5303105197Ssam } 5304105197Ssam } 5305105197Ssam } 5306120585Ssam SAHTREE_UNLOCK(); 5307105197Ssam { 5308105197Ssam struct mbuf *n; 5309105197Ssam struct sadb_msg *newmsg; 5310105197Ssam 5311105197Ssam /* create new sadb_msg to reply. */ 5312105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5313105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5314105197Ssam if (!n) 5315105197Ssam return key_senderror(so, m, ENOBUFS); 5316105197Ssam 5317105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5318105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5319105197Ssam if (n == NULL) 5320105197Ssam return key_senderror(so, m, ENOBUFS); 5321105197Ssam } 5322105197Ssam newmsg = mtod(n, struct sadb_msg *); 5323105197Ssam newmsg->sadb_msg_errno = 0; 5324105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5325105197Ssam 5326105197Ssam m_freem(m); 5327105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5328105197Ssam } 5329105197Ssam} 5330105197Ssam 5331105197Ssam/* 5332105197Ssam * SADB_GET processing 5333105197Ssam * receive 5334105197Ssam * <base, SA(*), address(SD)> 5335105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5336105197Ssam * and send, 5337105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5338105197Ssam * (identity(SD),) (sensitivity)> 5339105197Ssam * to the ikmpd. 5340105197Ssam * 5341105197Ssam * m will always be freed. 5342105197Ssam */ 5343105197Ssamstatic int 5344105197Ssamkey_get(so, m, mhp) 5345105197Ssam struct socket *so; 5346105197Ssam struct mbuf *m; 5347105197Ssam const struct sadb_msghdr *mhp; 5348105197Ssam{ 5349183550Szec INIT_VNET_IPSEC(curvnet); 5350105197Ssam struct sadb_sa *sa0; 5351105197Ssam struct sadb_address *src0, *dst0; 5352105197Ssam struct secasindex saidx; 5353105197Ssam struct secashead *sah; 5354105197Ssam struct secasvar *sav = NULL; 5355105197Ssam u_int16_t proto; 5356105197Ssam 5357120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5358120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5359120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5360120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5361105197Ssam 5362105197Ssam /* map satype to proto */ 5363105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5364120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5365120585Ssam __func__)); 5366105197Ssam return key_senderror(so, m, EINVAL); 5367105197Ssam } 5368105197Ssam 5369105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5370105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5371105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5372120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5373120585Ssam __func__)); 5374105197Ssam return key_senderror(so, m, EINVAL); 5375105197Ssam } 5376105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5377105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5378105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5379120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5380120585Ssam __func__)); 5381105197Ssam return key_senderror(so, m, EINVAL); 5382105197Ssam } 5383105197Ssam 5384105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5385105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5386105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5387105197Ssam 5388105197Ssam /* XXX boundary check against sa_len */ 5389105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5390105197Ssam 5391105197Ssam /* get a SA header */ 5392120585Ssam SAHTREE_LOCK(); 5393181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5394105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5395105197Ssam continue; 5396105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5397105197Ssam continue; 5398105197Ssam 5399105197Ssam /* get a SA with SPI. */ 5400105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5401105197Ssam if (sav) 5402105197Ssam break; 5403105197Ssam } 5404120585Ssam SAHTREE_UNLOCK(); 5405105197Ssam if (sah == NULL) { 5406120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5407105197Ssam return key_senderror(so, m, ENOENT); 5408105197Ssam } 5409105197Ssam 5410105197Ssam { 5411105197Ssam struct mbuf *n; 5412105197Ssam u_int8_t satype; 5413105197Ssam 5414105197Ssam /* map proto to satype */ 5415105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5416120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5417120585Ssam __func__)); 5418105197Ssam return key_senderror(so, m, EINVAL); 5419105197Ssam } 5420105197Ssam 5421105197Ssam /* create new sadb_msg to reply. */ 5422105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5423105197Ssam mhp->msg->sadb_msg_pid); 5424105197Ssam if (!n) 5425105197Ssam return key_senderror(so, m, ENOBUFS); 5426105197Ssam 5427105197Ssam m_freem(m); 5428105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5429105197Ssam } 5430105197Ssam} 5431105197Ssam 5432105197Ssam/* XXX make it sysctl-configurable? */ 5433105197Ssamstatic void 5434105197Ssamkey_getcomb_setlifetime(comb) 5435105197Ssam struct sadb_comb *comb; 5436105197Ssam{ 5437105197Ssam 5438105197Ssam comb->sadb_comb_soft_allocations = 1; 5439105197Ssam comb->sadb_comb_hard_allocations = 1; 5440105197Ssam comb->sadb_comb_soft_bytes = 0; 5441105197Ssam comb->sadb_comb_hard_bytes = 0; 5442105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5443105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5444105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5445105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5446105197Ssam} 5447105197Ssam 5448105197Ssam/* 5449105197Ssam * XXX reorder combinations by preference 5450105197Ssam * XXX no idea if the user wants ESP authentication or not 5451105197Ssam */ 5452105197Ssamstatic struct mbuf * 5453105197Ssamkey_getcomb_esp() 5454105197Ssam{ 5455183550Szec INIT_VNET_IPSEC(curvnet); 5456105197Ssam struct sadb_comb *comb; 5457105197Ssam struct enc_xform *algo; 5458105197Ssam struct mbuf *result = NULL, *m, *n; 5459105197Ssam int encmin; 5460105197Ssam int i, off, o; 5461105197Ssam int totlen; 5462105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5463105197Ssam 5464105197Ssam m = NULL; 5465105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 5466105197Ssam algo = esp_algorithm_lookup(i); 5467105197Ssam if (algo == NULL) 5468105197Ssam continue; 5469105197Ssam 5470105197Ssam /* discard algorithms with key size smaller than system min */ 5471181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 5472105197Ssam continue; 5473181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 5474181803Sbz encmin = V_ipsec_esp_keymin; 5475105197Ssam else 5476105197Ssam encmin = _BITS(algo->minkey); 5477105197Ssam 5478181803Sbz if (V_ipsec_esp_auth) 5479105197Ssam m = key_getcomb_ah(); 5480105197Ssam else { 5481120585Ssam IPSEC_ASSERT(l <= MLEN, 5482120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5483111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5484105197Ssam if (m) { 5485105197Ssam M_ALIGN(m, l); 5486105197Ssam m->m_len = l; 5487105197Ssam m->m_next = NULL; 5488105197Ssam bzero(mtod(m, caddr_t), m->m_len); 5489105197Ssam } 5490105197Ssam } 5491105197Ssam if (!m) 5492105197Ssam goto fail; 5493105197Ssam 5494105197Ssam totlen = 0; 5495105197Ssam for (n = m; n; n = n->m_next) 5496105197Ssam totlen += n->m_len; 5497120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 5498105197Ssam 5499105197Ssam for (off = 0; off < totlen; off += l) { 5500105197Ssam n = m_pulldown(m, off, l, &o); 5501105197Ssam if (!n) { 5502105197Ssam /* m is already freed */ 5503105197Ssam goto fail; 5504105197Ssam } 5505105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5506105197Ssam bzero(comb, sizeof(*comb)); 5507105197Ssam key_getcomb_setlifetime(comb); 5508105197Ssam comb->sadb_comb_encrypt = i; 5509105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 5510105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5511105197Ssam } 5512105197Ssam 5513105197Ssam if (!result) 5514105197Ssam result = m; 5515105197Ssam else 5516105197Ssam m_cat(result, m); 5517105197Ssam } 5518105197Ssam 5519105197Ssam return result; 5520105197Ssam 5521105197Ssam fail: 5522105197Ssam if (result) 5523105197Ssam m_freem(result); 5524105197Ssam return NULL; 5525105197Ssam} 5526105197Ssam 5527105197Ssamstatic void 5528105197Ssamkey_getsizes_ah( 5529105197Ssam const struct auth_hash *ah, 5530105197Ssam int alg, 5531105197Ssam u_int16_t* min, 5532105197Ssam u_int16_t* max) 5533105197Ssam{ 5534183550Szec INIT_VNET_IPSEC(curvnet); 5535183550Szec 5536105197Ssam *min = *max = ah->keysize; 5537105197Ssam if (ah->keysize == 0) { 5538105197Ssam /* 5539105197Ssam * Transform takes arbitrary key size but algorithm 5540105197Ssam * key size is restricted. Enforce this here. 5541105197Ssam */ 5542105197Ssam switch (alg) { 5543105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 5544105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 5545105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 5546105197Ssam default: 5547120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 5548120585Ssam __func__, alg)); 5549105197Ssam break; 5550105197Ssam } 5551105197Ssam } 5552105197Ssam} 5553105197Ssam 5554105197Ssam/* 5555105197Ssam * XXX reorder combinations by preference 5556105197Ssam */ 5557105197Ssamstatic struct mbuf * 5558105197Ssamkey_getcomb_ah() 5559105197Ssam{ 5560183550Szec INIT_VNET_IPSEC(curvnet); 5561105197Ssam struct sadb_comb *comb; 5562105197Ssam struct auth_hash *algo; 5563105197Ssam struct mbuf *m; 5564105197Ssam u_int16_t minkeysize, maxkeysize; 5565105197Ssam int i; 5566105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5567105197Ssam 5568105197Ssam m = NULL; 5569105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 5570105197Ssam#if 1 5571105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 5572105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5573105197Ssam continue; 5574105197Ssam#endif 5575105197Ssam algo = ah_algorithm_lookup(i); 5576105197Ssam if (!algo) 5577105197Ssam continue; 5578105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5579105197Ssam /* discard algorithms with key size smaller than system min */ 5580181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 5581105197Ssam continue; 5582105197Ssam 5583105197Ssam if (!m) { 5584120585Ssam IPSEC_ASSERT(l <= MLEN, 5585120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5586111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5587105197Ssam if (m) { 5588105197Ssam M_ALIGN(m, l); 5589105197Ssam m->m_len = l; 5590105197Ssam m->m_next = NULL; 5591105197Ssam } 5592105197Ssam } else 5593111119Simp M_PREPEND(m, l, M_DONTWAIT); 5594105197Ssam if (!m) 5595105197Ssam return NULL; 5596105197Ssam 5597105197Ssam comb = mtod(m, struct sadb_comb *); 5598105197Ssam bzero(comb, sizeof(*comb)); 5599105197Ssam key_getcomb_setlifetime(comb); 5600105197Ssam comb->sadb_comb_auth = i; 5601105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5602105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5603105197Ssam } 5604105197Ssam 5605105197Ssam return m; 5606105197Ssam} 5607105197Ssam 5608105197Ssam/* 5609105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 5610105197Ssam * XXX reorder combinations by preference 5611105197Ssam */ 5612105197Ssamstatic struct mbuf * 5613105197Ssamkey_getcomb_ipcomp() 5614105197Ssam{ 5615105197Ssam struct sadb_comb *comb; 5616105197Ssam struct comp_algo *algo; 5617105197Ssam struct mbuf *m; 5618105197Ssam int i; 5619105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5620105197Ssam 5621105197Ssam m = NULL; 5622105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5623105197Ssam algo = ipcomp_algorithm_lookup(i); 5624105197Ssam if (!algo) 5625105197Ssam continue; 5626105197Ssam 5627105197Ssam if (!m) { 5628120585Ssam IPSEC_ASSERT(l <= MLEN, 5629120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5630111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5631105197Ssam if (m) { 5632105197Ssam M_ALIGN(m, l); 5633105197Ssam m->m_len = l; 5634105197Ssam m->m_next = NULL; 5635105197Ssam } 5636105197Ssam } else 5637111119Simp M_PREPEND(m, l, M_DONTWAIT); 5638105197Ssam if (!m) 5639105197Ssam return NULL; 5640105197Ssam 5641105197Ssam comb = mtod(m, struct sadb_comb *); 5642105197Ssam bzero(comb, sizeof(*comb)); 5643105197Ssam key_getcomb_setlifetime(comb); 5644105197Ssam comb->sadb_comb_encrypt = i; 5645105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 5646105197Ssam } 5647105197Ssam 5648105197Ssam return m; 5649105197Ssam} 5650105197Ssam 5651105197Ssam/* 5652105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 5653105197Ssam * XXX replay checking? 5654105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 5655105197Ssam */ 5656105197Ssamstatic struct mbuf * 5657105197Ssamkey_getprop(saidx) 5658105197Ssam const struct secasindex *saidx; 5659105197Ssam{ 5660105197Ssam struct sadb_prop *prop; 5661105197Ssam struct mbuf *m, *n; 5662105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5663105197Ssam int totlen; 5664105197Ssam 5665105197Ssam switch (saidx->proto) { 5666105197Ssam case IPPROTO_ESP: 5667105197Ssam m = key_getcomb_esp(); 5668105197Ssam break; 5669105197Ssam case IPPROTO_AH: 5670105197Ssam m = key_getcomb_ah(); 5671105197Ssam break; 5672105197Ssam case IPPROTO_IPCOMP: 5673105197Ssam m = key_getcomb_ipcomp(); 5674105197Ssam break; 5675105197Ssam default: 5676105197Ssam return NULL; 5677105197Ssam } 5678105197Ssam 5679105197Ssam if (!m) 5680105197Ssam return NULL; 5681111119Simp M_PREPEND(m, l, M_DONTWAIT); 5682105197Ssam if (!m) 5683105197Ssam return NULL; 5684105197Ssam 5685105197Ssam totlen = 0; 5686105197Ssam for (n = m; n; n = n->m_next) 5687105197Ssam totlen += n->m_len; 5688105197Ssam 5689105197Ssam prop = mtod(m, struct sadb_prop *); 5690105197Ssam bzero(prop, sizeof(*prop)); 5691105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5692105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5693105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 5694105197Ssam 5695105197Ssam return m; 5696105197Ssam} 5697105197Ssam 5698105197Ssam/* 5699105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5700105197Ssam * send 5701105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 5702105197Ssam * (identity(SD),) (sensitivity,) proposal> 5703105197Ssam * to KMD, and expect to receive 5704105197Ssam * <base> with SADB_ACQUIRE if error occured, 5705105197Ssam * or 5706105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5707105197Ssam * from KMD by PF_KEY. 5708105197Ssam * 5709105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 5710105197Ssam * XXX sensitivity is not supported. 5711105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5712105197Ssam * see comment for key_getcomb_ipcomp(). 5713105197Ssam * 5714105197Ssam * OUT: 5715105197Ssam * 0 : succeed 5716105197Ssam * others: error number 5717105197Ssam */ 5718105197Ssamstatic int 5719105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5720105197Ssam{ 5721183550Szec INIT_VNET_IPSEC(curvnet); 5722105197Ssam struct mbuf *result = NULL, *m; 5723105197Ssam struct secacq *newacq; 5724105197Ssam u_int8_t satype; 5725105197Ssam int error = -1; 5726105197Ssam u_int32_t seq; 5727105197Ssam 5728120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 5729105197Ssam satype = key_proto2satype(saidx->proto); 5730120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 5731105197Ssam 5732105197Ssam /* 5733105197Ssam * We never do anything about acquirng SA. There is anather 5734105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 5735105197Ssam * getting something message from IKEd. In later case, to be 5736105197Ssam * managed with ACQUIRING list. 5737105197Ssam */ 5738108533Sschweikh /* Get an entry to check whether sending message or not. */ 5739105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 5740181803Sbz if (V_key_blockacq_count < newacq->count) { 5741105197Ssam /* reset counter and do send message. */ 5742105197Ssam newacq->count = 0; 5743105197Ssam } else { 5744105197Ssam /* increment counter and do nothing. */ 5745105197Ssam newacq->count++; 5746105197Ssam return 0; 5747105197Ssam } 5748105197Ssam } else { 5749105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 5750105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 5751105197Ssam return ENOBUFS; 5752105197Ssam } 5753105197Ssam 5754105197Ssam 5755105197Ssam seq = newacq->seq; 5756105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5757105197Ssam if (!m) { 5758105197Ssam error = ENOBUFS; 5759105197Ssam goto fail; 5760105197Ssam } 5761105197Ssam result = m; 5762105197Ssam 5763105197Ssam /* set sadb_address for saidx's. */ 5764105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5765105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5766105197Ssam if (!m) { 5767105197Ssam error = ENOBUFS; 5768105197Ssam goto fail; 5769105197Ssam } 5770105197Ssam m_cat(result, m); 5771105197Ssam 5772105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5773105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5774105197Ssam if (!m) { 5775105197Ssam error = ENOBUFS; 5776105197Ssam goto fail; 5777105197Ssam } 5778105197Ssam m_cat(result, m); 5779105197Ssam 5780105197Ssam /* XXX proxy address (optional) */ 5781105197Ssam 5782105197Ssam /* set sadb_x_policy */ 5783105197Ssam if (sp) { 5784105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5785105197Ssam if (!m) { 5786105197Ssam error = ENOBUFS; 5787105197Ssam goto fail; 5788105197Ssam } 5789105197Ssam m_cat(result, m); 5790105197Ssam } 5791105197Ssam 5792105197Ssam /* XXX identity (optional) */ 5793105197Ssam#if 0 5794105197Ssam if (idexttype && fqdn) { 5795105197Ssam /* create identity extension (FQDN) */ 5796105197Ssam struct sadb_ident *id; 5797105197Ssam int fqdnlen; 5798105197Ssam 5799105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5800105197Ssam id = (struct sadb_ident *)p; 5801105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5802105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5803105197Ssam id->sadb_ident_exttype = idexttype; 5804105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5805105197Ssam bcopy(fqdn, id + 1, fqdnlen); 5806105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5807105197Ssam } 5808105197Ssam 5809105197Ssam if (idexttype) { 5810105197Ssam /* create identity extension (USERFQDN) */ 5811105197Ssam struct sadb_ident *id; 5812105197Ssam int userfqdnlen; 5813105197Ssam 5814105197Ssam if (userfqdn) { 5815105197Ssam /* +1 for terminating-NUL */ 5816105197Ssam userfqdnlen = strlen(userfqdn) + 1; 5817105197Ssam } else 5818105197Ssam userfqdnlen = 0; 5819105197Ssam id = (struct sadb_ident *)p; 5820105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5821105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5822105197Ssam id->sadb_ident_exttype = idexttype; 5823105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5824105197Ssam /* XXX is it correct? */ 5825105197Ssam if (curproc && curproc->p_cred) 5826105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 5827105197Ssam if (userfqdn && userfqdnlen) 5828105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 5829105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5830105197Ssam } 5831105197Ssam#endif 5832105197Ssam 5833105197Ssam /* XXX sensitivity (optional) */ 5834105197Ssam 5835105197Ssam /* create proposal/combination extension */ 5836105197Ssam m = key_getprop(saidx); 5837105197Ssam#if 0 5838105197Ssam /* 5839105197Ssam * spec conformant: always attach proposal/combination extension, 5840105197Ssam * the problem is that we have no way to attach it for ipcomp, 5841105197Ssam * due to the way sadb_comb is declared in RFC2367. 5842105197Ssam */ 5843105197Ssam if (!m) { 5844105197Ssam error = ENOBUFS; 5845105197Ssam goto fail; 5846105197Ssam } 5847105197Ssam m_cat(result, m); 5848105197Ssam#else 5849105197Ssam /* 5850105197Ssam * outside of spec; make proposal/combination extension optional. 5851105197Ssam */ 5852105197Ssam if (m) 5853105197Ssam m_cat(result, m); 5854105197Ssam#endif 5855105197Ssam 5856105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 5857105197Ssam error = EINVAL; 5858105197Ssam goto fail; 5859105197Ssam } 5860105197Ssam 5861105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 5862105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 5863105197Ssam if (result == NULL) { 5864105197Ssam error = ENOBUFS; 5865105197Ssam goto fail; 5866105197Ssam } 5867105197Ssam } 5868105197Ssam 5869105197Ssam result->m_pkthdr.len = 0; 5870105197Ssam for (m = result; m; m = m->m_next) 5871105197Ssam result->m_pkthdr.len += m->m_len; 5872105197Ssam 5873105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 5874105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 5875105197Ssam 5876105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 5877105197Ssam 5878105197Ssam fail: 5879105197Ssam if (result) 5880105197Ssam m_freem(result); 5881105197Ssam return error; 5882105197Ssam} 5883105197Ssam 5884105197Ssamstatic struct secacq * 5885105197Ssamkey_newacq(const struct secasindex *saidx) 5886105197Ssam{ 5887183550Szec INIT_VNET_IPSEC(curvnet); 5888105197Ssam struct secacq *newacq; 5889105197Ssam 5890105197Ssam /* get new entry */ 5891119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5892105197Ssam if (newacq == NULL) { 5893120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5894105197Ssam return NULL; 5895105197Ssam } 5896105197Ssam 5897105197Ssam /* copy secindex */ 5898105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 5899181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 5900105197Ssam newacq->created = time_second; 5901105197Ssam newacq->count = 0; 5902105197Ssam 5903119643Ssam /* add to acqtree */ 5904120585Ssam ACQ_LOCK(); 5905181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 5906120585Ssam ACQ_UNLOCK(); 5907119643Ssam 5908105197Ssam return newacq; 5909105197Ssam} 5910105197Ssam 5911105197Ssamstatic struct secacq * 5912105197Ssamkey_getacq(const struct secasindex *saidx) 5913105197Ssam{ 5914183550Szec INIT_VNET_IPSEC(curvnet); 5915105197Ssam struct secacq *acq; 5916105197Ssam 5917120585Ssam ACQ_LOCK(); 5918181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5919105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 5920119643Ssam break; 5921105197Ssam } 5922120585Ssam ACQ_UNLOCK(); 5923105197Ssam 5924119643Ssam return acq; 5925105197Ssam} 5926105197Ssam 5927105197Ssamstatic struct secacq * 5928105197Ssamkey_getacqbyseq(seq) 5929105197Ssam u_int32_t seq; 5930105197Ssam{ 5931183550Szec INIT_VNET_IPSEC(curvnet); 5932105197Ssam struct secacq *acq; 5933105197Ssam 5934120585Ssam ACQ_LOCK(); 5935181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5936105197Ssam if (acq->seq == seq) 5937119643Ssam break; 5938105197Ssam } 5939120585Ssam ACQ_UNLOCK(); 5940105197Ssam 5941119643Ssam return acq; 5942105197Ssam} 5943105197Ssam 5944105197Ssamstatic struct secspacq * 5945105197Ssamkey_newspacq(spidx) 5946105197Ssam struct secpolicyindex *spidx; 5947105197Ssam{ 5948183550Szec INIT_VNET_IPSEC(curvnet); 5949105197Ssam struct secspacq *acq; 5950105197Ssam 5951105197Ssam /* get new entry */ 5952119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5953105197Ssam if (acq == NULL) { 5954120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5955105197Ssam return NULL; 5956105197Ssam } 5957105197Ssam 5958105197Ssam /* copy secindex */ 5959105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 5960105197Ssam acq->created = time_second; 5961105197Ssam acq->count = 0; 5962105197Ssam 5963119643Ssam /* add to spacqtree */ 5964120585Ssam SPACQ_LOCK(); 5965181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 5966120585Ssam SPACQ_UNLOCK(); 5967119643Ssam 5968105197Ssam return acq; 5969105197Ssam} 5970105197Ssam 5971105197Ssamstatic struct secspacq * 5972105197Ssamkey_getspacq(spidx) 5973105197Ssam struct secpolicyindex *spidx; 5974105197Ssam{ 5975183550Szec INIT_VNET_IPSEC(curvnet); 5976105197Ssam struct secspacq *acq; 5977105197Ssam 5978120585Ssam SPACQ_LOCK(); 5979181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 5980119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 5981119643Ssam /* NB: return holding spacq_lock */ 5982105197Ssam return acq; 5983119643Ssam } 5984105197Ssam } 5985120585Ssam SPACQ_UNLOCK(); 5986105197Ssam 5987105197Ssam return NULL; 5988105197Ssam} 5989105197Ssam 5990105197Ssam/* 5991105197Ssam * SADB_ACQUIRE processing, 5992105197Ssam * in first situation, is receiving 5993105197Ssam * <base> 5994105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 5995105197Ssam * 5996105197Ssam * In second situation, is receiving 5997105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 5998105197Ssam * from a user land process, and return 5999105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6000105197Ssam * to the socket. 6001105197Ssam * 6002105197Ssam * m will always be freed. 6003105197Ssam */ 6004105197Ssamstatic int 6005105197Ssamkey_acquire2(so, m, mhp) 6006105197Ssam struct socket *so; 6007105197Ssam struct mbuf *m; 6008105197Ssam const struct sadb_msghdr *mhp; 6009105197Ssam{ 6010183550Szec INIT_VNET_IPSEC(curvnet); 6011105197Ssam const struct sadb_address *src0, *dst0; 6012105197Ssam struct secasindex saidx; 6013105197Ssam struct secashead *sah; 6014105197Ssam u_int16_t proto; 6015105197Ssam int error; 6016105197Ssam 6017120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6018120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6019120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6020120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6021105197Ssam 6022105197Ssam /* 6023105197Ssam * Error message from KMd. 6024105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6025105197Ssam * message is equal to the size of sadb_msg structure. 6026105197Ssam * We do not raise error even if error occured in this function. 6027105197Ssam */ 6028105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6029105197Ssam struct secacq *acq; 6030105197Ssam 6031105197Ssam /* check sequence number */ 6032105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6033120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6034120585Ssam "number.\n", __func__)); 6035105197Ssam m_freem(m); 6036105197Ssam return 0; 6037105197Ssam } 6038105197Ssam 6039105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6040105197Ssam /* 6041105197Ssam * the specified larval SA is already gone, or we got 6042105197Ssam * a bogus sequence number. we can silently ignore it. 6043105197Ssam */ 6044105197Ssam m_freem(m); 6045105197Ssam return 0; 6046105197Ssam } 6047105197Ssam 6048105197Ssam /* reset acq counter in order to deletion by timehander. */ 6049105197Ssam acq->created = time_second; 6050105197Ssam acq->count = 0; 6051105197Ssam m_freem(m); 6052105197Ssam return 0; 6053105197Ssam } 6054105197Ssam 6055105197Ssam /* 6056105197Ssam * This message is from user land. 6057105197Ssam */ 6058105197Ssam 6059105197Ssam /* map satype to proto */ 6060105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6061120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6062120585Ssam __func__)); 6063105197Ssam return key_senderror(so, m, EINVAL); 6064105197Ssam } 6065105197Ssam 6066105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6067105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6068105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6069105197Ssam /* error */ 6070120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6071120585Ssam __func__)); 6072105197Ssam return key_senderror(so, m, EINVAL); 6073105197Ssam } 6074105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6075105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6076105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6077105197Ssam /* error */ 6078120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6079120585Ssam __func__)); 6080105197Ssam return key_senderror(so, m, EINVAL); 6081105197Ssam } 6082105197Ssam 6083105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6084105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6085105197Ssam 6086105197Ssam /* XXX boundary check against sa_len */ 6087105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6088105197Ssam 6089105197Ssam /* get a SA index */ 6090120585Ssam SAHTREE_LOCK(); 6091181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6092105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6093105197Ssam continue; 6094105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6095105197Ssam break; 6096105197Ssam } 6097120585Ssam SAHTREE_UNLOCK(); 6098105197Ssam if (sah != NULL) { 6099120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6100105197Ssam return key_senderror(so, m, EEXIST); 6101105197Ssam } 6102105197Ssam 6103105197Ssam error = key_acquire(&saidx, NULL); 6104105197Ssam if (error != 0) { 6105120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6106120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6107105197Ssam return key_senderror(so, m, error); 6108105197Ssam } 6109105197Ssam 6110105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6111105197Ssam} 6112105197Ssam 6113105197Ssam/* 6114105197Ssam * SADB_REGISTER processing. 6115105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6116105197Ssam * receive 6117105197Ssam * <base> 6118105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6119105197Ssam * and send 6120105197Ssam * <base, supported> 6121105197Ssam * to KMD by PF_KEY. 6122105197Ssam * If socket is detached, must free from regnode. 6123105197Ssam * 6124105197Ssam * m will always be freed. 6125105197Ssam */ 6126105197Ssamstatic int 6127105197Ssamkey_register(so, m, mhp) 6128105197Ssam struct socket *so; 6129105197Ssam struct mbuf *m; 6130105197Ssam const struct sadb_msghdr *mhp; 6131105197Ssam{ 6132183550Szec INIT_VNET_IPSEC(curvnet); 6133105197Ssam struct secreg *reg, *newreg = 0; 6134105197Ssam 6135120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6136120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6137120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6138120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6139105197Ssam 6140105197Ssam /* check for invalid register message */ 6141181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6142105197Ssam return key_senderror(so, m, EINVAL); 6143105197Ssam 6144105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6145105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6146105197Ssam goto setmsg; 6147105197Ssam 6148105197Ssam /* check whether existing or not */ 6149120585Ssam REGTREE_LOCK(); 6150181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6151105197Ssam if (reg->so == so) { 6152120585Ssam REGTREE_UNLOCK(); 6153120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6154120585Ssam __func__)); 6155105197Ssam return key_senderror(so, m, EEXIST); 6156105197Ssam } 6157105197Ssam } 6158105197Ssam 6159105197Ssam /* create regnode */ 6160119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6161105197Ssam if (newreg == NULL) { 6162120585Ssam REGTREE_UNLOCK(); 6163120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6164105197Ssam return key_senderror(so, m, ENOBUFS); 6165105197Ssam } 6166105197Ssam 6167105197Ssam newreg->so = so; 6168105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6169105197Ssam 6170105197Ssam /* add regnode to regtree. */ 6171181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6172120585Ssam REGTREE_UNLOCK(); 6173105197Ssam 6174105197Ssam setmsg: 6175105197Ssam { 6176105197Ssam struct mbuf *n; 6177105197Ssam struct sadb_msg *newmsg; 6178105197Ssam struct sadb_supported *sup; 6179105197Ssam u_int len, alen, elen; 6180105197Ssam int off; 6181105197Ssam int i; 6182105197Ssam struct sadb_alg *alg; 6183105197Ssam 6184105197Ssam /* create new sadb_msg to reply. */ 6185105197Ssam alen = 0; 6186105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6187105197Ssam if (ah_algorithm_lookup(i)) 6188105197Ssam alen += sizeof(struct sadb_alg); 6189105197Ssam } 6190105197Ssam if (alen) 6191105197Ssam alen += sizeof(struct sadb_supported); 6192105197Ssam elen = 0; 6193105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6194105197Ssam if (esp_algorithm_lookup(i)) 6195105197Ssam elen += sizeof(struct sadb_alg); 6196105197Ssam } 6197105197Ssam if (elen) 6198105197Ssam elen += sizeof(struct sadb_supported); 6199105197Ssam 6200105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6201105197Ssam 6202105197Ssam if (len > MCLBYTES) 6203105197Ssam return key_senderror(so, m, ENOBUFS); 6204105197Ssam 6205111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6206105197Ssam if (len > MHLEN) { 6207111119Simp MCLGET(n, M_DONTWAIT); 6208105197Ssam if ((n->m_flags & M_EXT) == 0) { 6209105197Ssam m_freem(n); 6210105197Ssam n = NULL; 6211105197Ssam } 6212105197Ssam } 6213105197Ssam if (!n) 6214105197Ssam return key_senderror(so, m, ENOBUFS); 6215105197Ssam 6216105197Ssam n->m_pkthdr.len = n->m_len = len; 6217105197Ssam n->m_next = NULL; 6218105197Ssam off = 0; 6219105197Ssam 6220105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6221105197Ssam newmsg = mtod(n, struct sadb_msg *); 6222105197Ssam newmsg->sadb_msg_errno = 0; 6223105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6224105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6225105197Ssam 6226105197Ssam /* for authentication algorithm */ 6227105197Ssam if (alen) { 6228105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6229105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6230105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6231105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6232105197Ssam 6233105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6234105197Ssam struct auth_hash *aalgo; 6235105197Ssam u_int16_t minkeysize, maxkeysize; 6236105197Ssam 6237105197Ssam aalgo = ah_algorithm_lookup(i); 6238105197Ssam if (!aalgo) 6239105197Ssam continue; 6240105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6241105197Ssam alg->sadb_alg_id = i; 6242105197Ssam alg->sadb_alg_ivlen = 0; 6243105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6244105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6245105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6246105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6247105197Ssam } 6248105197Ssam } 6249105197Ssam 6250105197Ssam /* for encryption algorithm */ 6251105197Ssam if (elen) { 6252105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6253105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6254105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6255105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6256105197Ssam 6257105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6258105197Ssam struct enc_xform *ealgo; 6259105197Ssam 6260105197Ssam ealgo = esp_algorithm_lookup(i); 6261105197Ssam if (!ealgo) 6262105197Ssam continue; 6263105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6264105197Ssam alg->sadb_alg_id = i; 6265105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6266105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6267105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6268105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6269105197Ssam } 6270105197Ssam } 6271105197Ssam 6272120585Ssam IPSEC_ASSERT(off == len, 6273120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6274105197Ssam 6275105197Ssam m_freem(m); 6276105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6277105197Ssam } 6278105197Ssam} 6279105197Ssam 6280105197Ssam/* 6281105197Ssam * free secreg entry registered. 6282105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6283105197Ssam */ 6284105197Ssamvoid 6285119643Ssamkey_freereg(struct socket *so) 6286105197Ssam{ 6287183550Szec INIT_VNET_IPSEC(curvnet); 6288105197Ssam struct secreg *reg; 6289105197Ssam int i; 6290105197Ssam 6291120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6292105197Ssam 6293105197Ssam /* 6294105197Ssam * check whether existing or not. 6295105197Ssam * check all type of SA, because there is a potential that 6296105197Ssam * one socket is registered to multiple type of SA. 6297105197Ssam */ 6298120585Ssam REGTREE_LOCK(); 6299105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6300181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6301119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6302105197Ssam LIST_REMOVE(reg, chain); 6303119643Ssam free(reg, M_IPSEC_SAR); 6304105197Ssam break; 6305105197Ssam } 6306105197Ssam } 6307105197Ssam } 6308120585Ssam REGTREE_UNLOCK(); 6309105197Ssam} 6310105197Ssam 6311105197Ssam/* 6312105197Ssam * SADB_EXPIRE processing 6313105197Ssam * send 6314105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6315105197Ssam * to KMD by PF_KEY. 6316105197Ssam * NOTE: We send only soft lifetime extension. 6317105197Ssam * 6318105197Ssam * OUT: 0 : succeed 6319105197Ssam * others : error number 6320105197Ssam */ 6321105197Ssamstatic int 6322119643Ssamkey_expire(struct secasvar *sav) 6323105197Ssam{ 6324105197Ssam int s; 6325105197Ssam int satype; 6326105197Ssam struct mbuf *result = NULL, *m; 6327105197Ssam int len; 6328105197Ssam int error = -1; 6329105197Ssam struct sadb_lifetime *lt; 6330105197Ssam 6331105197Ssam /* XXX: Why do we lock ? */ 6332105197Ssam s = splnet(); /*called from softclock()*/ 6333105197Ssam 6334120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6335120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6336105197Ssam 6337105197Ssam /* set msg header */ 6338120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6339120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6340105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6341105197Ssam if (!m) { 6342105197Ssam error = ENOBUFS; 6343105197Ssam goto fail; 6344105197Ssam } 6345105197Ssam result = m; 6346105197Ssam 6347105197Ssam /* create SA extension */ 6348105197Ssam m = key_setsadbsa(sav); 6349105197Ssam if (!m) { 6350105197Ssam error = ENOBUFS; 6351105197Ssam goto fail; 6352105197Ssam } 6353105197Ssam m_cat(result, m); 6354105197Ssam 6355105197Ssam /* create SA extension */ 6356105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6357105197Ssam sav->replay ? sav->replay->count : 0, 6358105197Ssam sav->sah->saidx.reqid); 6359105197Ssam if (!m) { 6360105197Ssam error = ENOBUFS; 6361105197Ssam goto fail; 6362105197Ssam } 6363105197Ssam m_cat(result, m); 6364105197Ssam 6365105197Ssam /* create lifetime extension (current and soft) */ 6366105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6367105197Ssam m = key_alloc_mbuf(len); 6368105197Ssam if (!m || m->m_next) { /*XXX*/ 6369105197Ssam if (m) 6370105197Ssam m_freem(m); 6371105197Ssam error = ENOBUFS; 6372105197Ssam goto fail; 6373105197Ssam } 6374105197Ssam bzero(mtod(m, caddr_t), len); 6375105197Ssam lt = mtod(m, struct sadb_lifetime *); 6376105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6377105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6378157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6379157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6380157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6381157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6382105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6383176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6384176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6385176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6386176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6387176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6388176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6389105197Ssam m_cat(result, m); 6390105197Ssam 6391105197Ssam /* set sadb_address for source */ 6392105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6393105197Ssam &sav->sah->saidx.src.sa, 6394105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6395105197Ssam if (!m) { 6396105197Ssam error = ENOBUFS; 6397105197Ssam goto fail; 6398105197Ssam } 6399105197Ssam m_cat(result, m); 6400105197Ssam 6401105197Ssam /* set sadb_address for destination */ 6402105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6403105197Ssam &sav->sah->saidx.dst.sa, 6404105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6405105197Ssam if (!m) { 6406105197Ssam error = ENOBUFS; 6407105197Ssam goto fail; 6408105197Ssam } 6409105197Ssam m_cat(result, m); 6410105197Ssam 6411105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6412105197Ssam error = EINVAL; 6413105197Ssam goto fail; 6414105197Ssam } 6415105197Ssam 6416105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6417105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6418105197Ssam if (result == NULL) { 6419105197Ssam error = ENOBUFS; 6420105197Ssam goto fail; 6421105197Ssam } 6422105197Ssam } 6423105197Ssam 6424105197Ssam result->m_pkthdr.len = 0; 6425105197Ssam for (m = result; m; m = m->m_next) 6426105197Ssam result->m_pkthdr.len += m->m_len; 6427105197Ssam 6428105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6429105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6430105197Ssam 6431105197Ssam splx(s); 6432105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6433105197Ssam 6434105197Ssam fail: 6435105197Ssam if (result) 6436105197Ssam m_freem(result); 6437105197Ssam splx(s); 6438105197Ssam return error; 6439105197Ssam} 6440105197Ssam 6441105197Ssam/* 6442105197Ssam * SADB_FLUSH processing 6443105197Ssam * receive 6444105197Ssam * <base> 6445105197Ssam * from the ikmpd, and free all entries in secastree. 6446105197Ssam * and send, 6447105197Ssam * <base> 6448105197Ssam * to the ikmpd. 6449105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 6450105197Ssam * 6451105197Ssam * m will always be freed. 6452105197Ssam */ 6453105197Ssamstatic int 6454105197Ssamkey_flush(so, m, mhp) 6455105197Ssam struct socket *so; 6456105197Ssam struct mbuf *m; 6457105197Ssam const struct sadb_msghdr *mhp; 6458105197Ssam{ 6459183550Szec INIT_VNET_IPSEC(curvnet); 6460105197Ssam struct sadb_msg *newmsg; 6461105197Ssam struct secashead *sah, *nextsah; 6462105197Ssam struct secasvar *sav, *nextsav; 6463105197Ssam u_int16_t proto; 6464105197Ssam u_int8_t state; 6465105197Ssam u_int stateidx; 6466105197Ssam 6467120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6468120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6469120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6470105197Ssam 6471105197Ssam /* map satype to proto */ 6472105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6473120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6474120585Ssam __func__)); 6475105197Ssam return key_senderror(so, m, EINVAL); 6476105197Ssam } 6477105197Ssam 6478105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 6479120585Ssam SAHTREE_LOCK(); 6480181803Sbz for (sah = LIST_FIRST(&V_sahtree); 6481105197Ssam sah != NULL; 6482105197Ssam sah = nextsah) { 6483105197Ssam nextsah = LIST_NEXT(sah, chain); 6484105197Ssam 6485105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6486105197Ssam && proto != sah->saidx.proto) 6487105197Ssam continue; 6488105197Ssam 6489105197Ssam for (stateidx = 0; 6490185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 6491105197Ssam stateidx++) { 6492185348Szec state = saorder_state_any[stateidx]; 6493105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 6494105197Ssam sav != NULL; 6495105197Ssam sav = nextsav) { 6496105197Ssam 6497105197Ssam nextsav = LIST_NEXT(sav, chain); 6498105197Ssam 6499105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6500105197Ssam KEY_FREESAV(&sav); 6501105197Ssam } 6502105197Ssam } 6503105197Ssam 6504105197Ssam sah->state = SADB_SASTATE_DEAD; 6505105197Ssam } 6506120585Ssam SAHTREE_UNLOCK(); 6507105197Ssam 6508105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 6509105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6510120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6511105197Ssam return key_senderror(so, m, ENOBUFS); 6512105197Ssam } 6513105197Ssam 6514105197Ssam if (m->m_next) 6515105197Ssam m_freem(m->m_next); 6516105197Ssam m->m_next = NULL; 6517105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6518105197Ssam newmsg = mtod(m, struct sadb_msg *); 6519105197Ssam newmsg->sadb_msg_errno = 0; 6520105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6521105197Ssam 6522105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6523105197Ssam} 6524105197Ssam 6525105197Ssam/* 6526105197Ssam * SADB_DUMP processing 6527105197Ssam * dump all entries including status of DEAD in SAD. 6528105197Ssam * receive 6529105197Ssam * <base> 6530105197Ssam * from the ikmpd, and dump all secasvar leaves 6531105197Ssam * and send, 6532105197Ssam * <base> ..... 6533105197Ssam * to the ikmpd. 6534105197Ssam * 6535105197Ssam * m will always be freed. 6536105197Ssam */ 6537105197Ssamstatic int 6538105197Ssamkey_dump(so, m, mhp) 6539105197Ssam struct socket *so; 6540105197Ssam struct mbuf *m; 6541105197Ssam const struct sadb_msghdr *mhp; 6542105197Ssam{ 6543183550Szec INIT_VNET_IPSEC(curvnet); 6544105197Ssam struct secashead *sah; 6545105197Ssam struct secasvar *sav; 6546105197Ssam u_int16_t proto; 6547105197Ssam u_int stateidx; 6548105197Ssam u_int8_t satype; 6549105197Ssam u_int8_t state; 6550105197Ssam int cnt; 6551105197Ssam struct sadb_msg *newmsg; 6552105197Ssam struct mbuf *n; 6553105197Ssam 6554120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6555120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6556120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6557120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6558105197Ssam 6559105197Ssam /* map satype to proto */ 6560105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6561120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6562120585Ssam __func__)); 6563105197Ssam return key_senderror(so, m, EINVAL); 6564105197Ssam } 6565105197Ssam 6566105197Ssam /* count sav entries to be sent to the userland. */ 6567105197Ssam cnt = 0; 6568120585Ssam SAHTREE_LOCK(); 6569181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6570105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6571105197Ssam && proto != sah->saidx.proto) 6572105197Ssam continue; 6573105197Ssam 6574105197Ssam for (stateidx = 0; 6575185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6576105197Ssam stateidx++) { 6577185348Szec state = saorder_state_any[stateidx]; 6578105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6579105197Ssam cnt++; 6580105197Ssam } 6581105197Ssam } 6582105197Ssam } 6583105197Ssam 6584119643Ssam if (cnt == 0) { 6585120585Ssam SAHTREE_UNLOCK(); 6586105197Ssam return key_senderror(so, m, ENOENT); 6587119643Ssam } 6588105197Ssam 6589105197Ssam /* send this to the userland, one at a time. */ 6590105197Ssam newmsg = NULL; 6591181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6592105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6593105197Ssam && proto != sah->saidx.proto) 6594105197Ssam continue; 6595105197Ssam 6596105197Ssam /* map proto to satype */ 6597105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6598120585Ssam SAHTREE_UNLOCK(); 6599120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 6600120585Ssam "SAD.\n", __func__)); 6601105197Ssam return key_senderror(so, m, EINVAL); 6602105197Ssam } 6603105197Ssam 6604105197Ssam for (stateidx = 0; 6605185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6606105197Ssam stateidx++) { 6607185348Szec state = saorder_state_any[stateidx]; 6608105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6609105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 6610105197Ssam --cnt, mhp->msg->sadb_msg_pid); 6611119643Ssam if (!n) { 6612120585Ssam SAHTREE_UNLOCK(); 6613105197Ssam return key_senderror(so, m, ENOBUFS); 6614119643Ssam } 6615105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6616105197Ssam } 6617105197Ssam } 6618105197Ssam } 6619120585Ssam SAHTREE_UNLOCK(); 6620105197Ssam 6621105197Ssam m_freem(m); 6622105197Ssam return 0; 6623105197Ssam} 6624105197Ssam 6625105197Ssam/* 6626105197Ssam * SADB_X_PROMISC processing 6627105197Ssam * 6628105197Ssam * m will always be freed. 6629105197Ssam */ 6630105197Ssamstatic int 6631105197Ssamkey_promisc(so, m, mhp) 6632105197Ssam struct socket *so; 6633105197Ssam struct mbuf *m; 6634105197Ssam const struct sadb_msghdr *mhp; 6635105197Ssam{ 6636105197Ssam int olen; 6637105197Ssam 6638120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6639120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6640120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6641120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6642105197Ssam 6643105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6644105197Ssam 6645105197Ssam if (olen < sizeof(struct sadb_msg)) { 6646105197Ssam#if 1 6647105197Ssam return key_senderror(so, m, EINVAL); 6648105197Ssam#else 6649105197Ssam m_freem(m); 6650105197Ssam return 0; 6651105197Ssam#endif 6652105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 6653105197Ssam /* enable/disable promisc mode */ 6654105197Ssam struct keycb *kp; 6655105197Ssam 6656105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6657105197Ssam return key_senderror(so, m, EINVAL); 6658105197Ssam mhp->msg->sadb_msg_errno = 0; 6659105197Ssam switch (mhp->msg->sadb_msg_satype) { 6660105197Ssam case 0: 6661105197Ssam case 1: 6662105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 6663105197Ssam break; 6664105197Ssam default: 6665105197Ssam return key_senderror(so, m, EINVAL); 6666105197Ssam } 6667105197Ssam 6668105197Ssam /* send the original message back to everyone */ 6669105197Ssam mhp->msg->sadb_msg_errno = 0; 6670105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6671105197Ssam } else { 6672105197Ssam /* send packet as is */ 6673105197Ssam 6674105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6675105197Ssam 6676105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6677105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6678105197Ssam } 6679105197Ssam} 6680105197Ssam 6681105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6682105197Ssam const struct sadb_msghdr *)) = { 6683105197Ssam NULL, /* SADB_RESERVED */ 6684105197Ssam key_getspi, /* SADB_GETSPI */ 6685105197Ssam key_update, /* SADB_UPDATE */ 6686105197Ssam key_add, /* SADB_ADD */ 6687105197Ssam key_delete, /* SADB_DELETE */ 6688105197Ssam key_get, /* SADB_GET */ 6689105197Ssam key_acquire2, /* SADB_ACQUIRE */ 6690105197Ssam key_register, /* SADB_REGISTER */ 6691105197Ssam NULL, /* SADB_EXPIRE */ 6692105197Ssam key_flush, /* SADB_FLUSH */ 6693105197Ssam key_dump, /* SADB_DUMP */ 6694105197Ssam key_promisc, /* SADB_X_PROMISC */ 6695105197Ssam NULL, /* SADB_X_PCHANGE */ 6696105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 6697105197Ssam key_spdadd, /* SADB_X_SPDADD */ 6698105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 6699105197Ssam key_spdget, /* SADB_X_SPDGET */ 6700105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 6701105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 6702105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 6703105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 6704105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 6705105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 6706105197Ssam}; 6707105197Ssam 6708105197Ssam/* 6709105197Ssam * parse sadb_msg buffer to process PFKEYv2, 6710105197Ssam * and create a data to response if needed. 6711105197Ssam * I think to be dealed with mbuf directly. 6712105197Ssam * IN: 6713105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 6714105197Ssam * This is rewrited to response. 6715105197Ssam * so : pointer to socket. 6716105197Ssam * OUT: 6717105197Ssam * length for buffer to send to user process. 6718105197Ssam */ 6719105197Ssamint 6720105197Ssamkey_parse(m, so) 6721105197Ssam struct mbuf *m; 6722105197Ssam struct socket *so; 6723105197Ssam{ 6724183550Szec INIT_VNET_IPSEC(curvnet); 6725105197Ssam struct sadb_msg *msg; 6726105197Ssam struct sadb_msghdr mh; 6727105197Ssam u_int orglen; 6728105197Ssam int error; 6729105197Ssam int target; 6730105197Ssam 6731120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6732120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6733105197Ssam 6734105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6735105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 6736120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 6737105197Ssam kdebug_sadb(msg)); 6738105197Ssam#endif 6739105197Ssam 6740105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 6741105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 6742105197Ssam if (!m) 6743105197Ssam return ENOBUFS; 6744105197Ssam } 6745105197Ssam msg = mtod(m, struct sadb_msg *); 6746105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6747105197Ssam target = KEY_SENDUP_ONE; 6748105197Ssam 6749105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 6750105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 6751120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 6752181803Sbz V_pfkeystat.out_invlen++; 6753105197Ssam error = EINVAL; 6754105197Ssam goto senderror; 6755105197Ssam } 6756105197Ssam 6757105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 6758120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 6759120585Ssam __func__, msg->sadb_msg_version)); 6760181803Sbz V_pfkeystat.out_invver++; 6761105197Ssam error = EINVAL; 6762105197Ssam goto senderror; 6763105197Ssam } 6764105197Ssam 6765105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 6766120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6767120585Ssam __func__, msg->sadb_msg_type)); 6768181803Sbz V_pfkeystat.out_invmsgtype++; 6769105197Ssam error = EINVAL; 6770105197Ssam goto senderror; 6771105197Ssam } 6772105197Ssam 6773105197Ssam /* for old-fashioned code - should be nuked */ 6774105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 6775105197Ssam m_freem(m); 6776105197Ssam return ENOBUFS; 6777105197Ssam } 6778105197Ssam if (m->m_next) { 6779105197Ssam struct mbuf *n; 6780105197Ssam 6781111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6782105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 6783111119Simp MCLGET(n, M_DONTWAIT); 6784105197Ssam if ((n->m_flags & M_EXT) == 0) { 6785105197Ssam m_free(n); 6786105197Ssam n = NULL; 6787105197Ssam } 6788105197Ssam } 6789105197Ssam if (!n) { 6790105197Ssam m_freem(m); 6791105197Ssam return ENOBUFS; 6792105197Ssam } 6793105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 6794105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 6795105197Ssam n->m_next = NULL; 6796105197Ssam m_freem(m); 6797105197Ssam m = n; 6798105197Ssam } 6799105197Ssam 6800105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 6801105197Ssam error = key_align(m, &mh); 6802105197Ssam if (error) 6803105197Ssam return error; 6804105197Ssam 6805105197Ssam msg = mh.msg; 6806105197Ssam 6807105197Ssam /* check SA type */ 6808105197Ssam switch (msg->sadb_msg_satype) { 6809105197Ssam case SADB_SATYPE_UNSPEC: 6810105197Ssam switch (msg->sadb_msg_type) { 6811105197Ssam case SADB_GETSPI: 6812105197Ssam case SADB_UPDATE: 6813105197Ssam case SADB_ADD: 6814105197Ssam case SADB_DELETE: 6815105197Ssam case SADB_GET: 6816105197Ssam case SADB_ACQUIRE: 6817105197Ssam case SADB_EXPIRE: 6818120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 6819120585Ssam "when msg type=%u.\n", __func__, 6820120585Ssam msg->sadb_msg_type)); 6821181803Sbz V_pfkeystat.out_invsatype++; 6822105197Ssam error = EINVAL; 6823105197Ssam goto senderror; 6824105197Ssam } 6825105197Ssam break; 6826105197Ssam case SADB_SATYPE_AH: 6827105197Ssam case SADB_SATYPE_ESP: 6828105197Ssam case SADB_X_SATYPE_IPCOMP: 6829125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 6830105197Ssam switch (msg->sadb_msg_type) { 6831105197Ssam case SADB_X_SPDADD: 6832105197Ssam case SADB_X_SPDDELETE: 6833105197Ssam case SADB_X_SPDGET: 6834105197Ssam case SADB_X_SPDDUMP: 6835105197Ssam case SADB_X_SPDFLUSH: 6836105197Ssam case SADB_X_SPDSETIDX: 6837105197Ssam case SADB_X_SPDUPDATE: 6838105197Ssam case SADB_X_SPDDELETE2: 6839120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 6840120585Ssam __func__, msg->sadb_msg_type)); 6841181803Sbz V_pfkeystat.out_invsatype++; 6842105197Ssam error = EINVAL; 6843105197Ssam goto senderror; 6844105197Ssam } 6845105197Ssam break; 6846105197Ssam case SADB_SATYPE_RSVP: 6847105197Ssam case SADB_SATYPE_OSPFV2: 6848105197Ssam case SADB_SATYPE_RIPV2: 6849105197Ssam case SADB_SATYPE_MIP: 6850120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 6851120585Ssam __func__, msg->sadb_msg_satype)); 6852181803Sbz V_pfkeystat.out_invsatype++; 6853105197Ssam error = EOPNOTSUPP; 6854105197Ssam goto senderror; 6855105197Ssam case 1: /* XXX: What does it do? */ 6856105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 6857105197Ssam break; 6858105197Ssam /*FALLTHROUGH*/ 6859105197Ssam default: 6860120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6861120585Ssam __func__, msg->sadb_msg_satype)); 6862181803Sbz V_pfkeystat.out_invsatype++; 6863105197Ssam error = EINVAL; 6864105197Ssam goto senderror; 6865105197Ssam } 6866105197Ssam 6867105197Ssam /* check field of upper layer protocol and address family */ 6868105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 6869105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 6870105197Ssam struct sadb_address *src0, *dst0; 6871105197Ssam u_int plen; 6872105197Ssam 6873105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 6874105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 6875105197Ssam 6876105197Ssam /* check upper layer protocol */ 6877105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 6878120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 6879120585Ssam "mismatched.\n", __func__)); 6880181803Sbz V_pfkeystat.out_invaddr++; 6881105197Ssam error = EINVAL; 6882105197Ssam goto senderror; 6883105197Ssam } 6884105197Ssam 6885105197Ssam /* check family */ 6886105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 6887105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 6888120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 6889120585Ssam __func__)); 6890181803Sbz V_pfkeystat.out_invaddr++; 6891105197Ssam error = EINVAL; 6892105197Ssam goto senderror; 6893105197Ssam } 6894105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6895105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 6896120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 6897120585Ssam "mismatched.\n", __func__)); 6898181803Sbz V_pfkeystat.out_invaddr++; 6899105197Ssam error = EINVAL; 6900105197Ssam goto senderror; 6901105197Ssam } 6902105197Ssam 6903105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6904105197Ssam case AF_INET: 6905105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6906105197Ssam sizeof(struct sockaddr_in)) { 6907181803Sbz V_pfkeystat.out_invaddr++; 6908105197Ssam error = EINVAL; 6909105197Ssam goto senderror; 6910105197Ssam } 6911105197Ssam break; 6912105197Ssam case AF_INET6: 6913105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6914105197Ssam sizeof(struct sockaddr_in6)) { 6915181803Sbz V_pfkeystat.out_invaddr++; 6916105197Ssam error = EINVAL; 6917105197Ssam goto senderror; 6918105197Ssam } 6919105197Ssam break; 6920105197Ssam default: 6921120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 6922120585Ssam __func__)); 6923181803Sbz V_pfkeystat.out_invaddr++; 6924105197Ssam error = EAFNOSUPPORT; 6925105197Ssam goto senderror; 6926105197Ssam } 6927105197Ssam 6928105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6929105197Ssam case AF_INET: 6930105197Ssam plen = sizeof(struct in_addr) << 3; 6931105197Ssam break; 6932105197Ssam case AF_INET6: 6933105197Ssam plen = sizeof(struct in6_addr) << 3; 6934105197Ssam break; 6935105197Ssam default: 6936105197Ssam plen = 0; /*fool gcc*/ 6937105197Ssam break; 6938105197Ssam } 6939105197Ssam 6940105197Ssam /* check max prefix length */ 6941105197Ssam if (src0->sadb_address_prefixlen > plen || 6942105197Ssam dst0->sadb_address_prefixlen > plen) { 6943120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 6944120585Ssam __func__)); 6945181803Sbz V_pfkeystat.out_invaddr++; 6946105197Ssam error = EINVAL; 6947105197Ssam goto senderror; 6948105197Ssam } 6949105197Ssam 6950105197Ssam /* 6951105197Ssam * prefixlen == 0 is valid because there can be a case when 6952105197Ssam * all addresses are matched. 6953105197Ssam */ 6954105197Ssam } 6955105197Ssam 6956105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 6957105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 6958181803Sbz V_pfkeystat.out_invmsgtype++; 6959105197Ssam error = EINVAL; 6960105197Ssam goto senderror; 6961105197Ssam } 6962105197Ssam 6963105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 6964105197Ssam 6965105197Ssamsenderror: 6966105197Ssam msg->sadb_msg_errno = error; 6967105197Ssam return key_sendup_mbuf(so, m, target); 6968105197Ssam} 6969105197Ssam 6970105197Ssamstatic int 6971105197Ssamkey_senderror(so, m, code) 6972105197Ssam struct socket *so; 6973105197Ssam struct mbuf *m; 6974105197Ssam int code; 6975105197Ssam{ 6976105197Ssam struct sadb_msg *msg; 6977105197Ssam 6978120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 6979120585Ssam ("mbuf too small, len %u", m->m_len)); 6980105197Ssam 6981105197Ssam msg = mtod(m, struct sadb_msg *); 6982105197Ssam msg->sadb_msg_errno = code; 6983105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 6984105197Ssam} 6985105197Ssam 6986105197Ssam/* 6987105197Ssam * set the pointer to each header into message buffer. 6988105197Ssam * m will be freed on error. 6989105197Ssam * XXX larger-than-MCLBYTES extension? 6990105197Ssam */ 6991105197Ssamstatic int 6992105197Ssamkey_align(m, mhp) 6993105197Ssam struct mbuf *m; 6994105197Ssam struct sadb_msghdr *mhp; 6995105197Ssam{ 6996183550Szec INIT_VNET_IPSEC(curvnet); 6997105197Ssam struct mbuf *n; 6998105197Ssam struct sadb_ext *ext; 6999105197Ssam size_t off, end; 7000105197Ssam int extlen; 7001105197Ssam int toff; 7002105197Ssam 7003120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7004120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7005120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7006120585Ssam ("mbuf too small, len %u", m->m_len)); 7007105197Ssam 7008105197Ssam /* initialize */ 7009105197Ssam bzero(mhp, sizeof(*mhp)); 7010105197Ssam 7011105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7012105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7013105197Ssam 7014105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7015105197Ssam extlen = end; /*just in case extlen is not updated*/ 7016105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7017105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7018105197Ssam if (!n) { 7019105197Ssam /* m is already freed */ 7020105197Ssam return ENOBUFS; 7021105197Ssam } 7022105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7023105197Ssam 7024105197Ssam /* set pointer */ 7025105197Ssam switch (ext->sadb_ext_type) { 7026105197Ssam case SADB_EXT_SA: 7027105197Ssam case SADB_EXT_ADDRESS_SRC: 7028105197Ssam case SADB_EXT_ADDRESS_DST: 7029105197Ssam case SADB_EXT_ADDRESS_PROXY: 7030105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7031105197Ssam case SADB_EXT_LIFETIME_HARD: 7032105197Ssam case SADB_EXT_LIFETIME_SOFT: 7033105197Ssam case SADB_EXT_KEY_AUTH: 7034105197Ssam case SADB_EXT_KEY_ENCRYPT: 7035105197Ssam case SADB_EXT_IDENTITY_SRC: 7036105197Ssam case SADB_EXT_IDENTITY_DST: 7037105197Ssam case SADB_EXT_SENSITIVITY: 7038105197Ssam case SADB_EXT_PROPOSAL: 7039105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7040105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7041105197Ssam case SADB_EXT_SPIRANGE: 7042105197Ssam case SADB_X_EXT_POLICY: 7043105197Ssam case SADB_X_EXT_SA2: 7044105197Ssam /* duplicate check */ 7045105197Ssam /* 7046105197Ssam * XXX Are there duplication payloads of either 7047105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7048105197Ssam */ 7049105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7050120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7051120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7052105197Ssam m_freem(m); 7053181803Sbz V_pfkeystat.out_dupext++; 7054105197Ssam return EINVAL; 7055105197Ssam } 7056105197Ssam break; 7057105197Ssam default: 7058120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7059120585Ssam __func__, ext->sadb_ext_type)); 7060105197Ssam m_freem(m); 7061181803Sbz V_pfkeystat.out_invexttype++; 7062105197Ssam return EINVAL; 7063105197Ssam } 7064105197Ssam 7065105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7066105197Ssam 7067105197Ssam if (key_validate_ext(ext, extlen)) { 7068105197Ssam m_freem(m); 7069181803Sbz V_pfkeystat.out_invlen++; 7070105197Ssam return EINVAL; 7071105197Ssam } 7072105197Ssam 7073105197Ssam n = m_pulldown(m, off, extlen, &toff); 7074105197Ssam if (!n) { 7075105197Ssam /* m is already freed */ 7076105197Ssam return ENOBUFS; 7077105197Ssam } 7078105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7079105197Ssam 7080105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7081105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7082105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7083105197Ssam } 7084105197Ssam 7085105197Ssam if (off != end) { 7086105197Ssam m_freem(m); 7087181803Sbz V_pfkeystat.out_invlen++; 7088105197Ssam return EINVAL; 7089105197Ssam } 7090105197Ssam 7091105197Ssam return 0; 7092105197Ssam} 7093105197Ssam 7094105197Ssamstatic int 7095105197Ssamkey_validate_ext(ext, len) 7096105197Ssam const struct sadb_ext *ext; 7097105197Ssam int len; 7098105197Ssam{ 7099105197Ssam const struct sockaddr *sa; 7100105197Ssam enum { NONE, ADDR } checktype = NONE; 7101105197Ssam int baselen = 0; 7102105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7103105197Ssam 7104105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7105105197Ssam return EINVAL; 7106105197Ssam 7107105197Ssam /* if it does not match minimum/maximum length, bail */ 7108105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7109105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7110105197Ssam return EINVAL; 7111105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7112105197Ssam return EINVAL; 7113105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7114105197Ssam return EINVAL; 7115105197Ssam 7116105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7117105197Ssam switch (ext->sadb_ext_type) { 7118105197Ssam case SADB_EXT_ADDRESS_SRC: 7119105197Ssam case SADB_EXT_ADDRESS_DST: 7120105197Ssam case SADB_EXT_ADDRESS_PROXY: 7121105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7122105197Ssam checktype = ADDR; 7123105197Ssam break; 7124105197Ssam case SADB_EXT_IDENTITY_SRC: 7125105197Ssam case SADB_EXT_IDENTITY_DST: 7126105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7127105197Ssam SADB_X_IDENTTYPE_ADDR) { 7128105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7129105197Ssam checktype = ADDR; 7130105197Ssam } else 7131105197Ssam checktype = NONE; 7132105197Ssam break; 7133105197Ssam default: 7134105197Ssam checktype = NONE; 7135105197Ssam break; 7136105197Ssam } 7137105197Ssam 7138105197Ssam switch (checktype) { 7139105197Ssam case NONE: 7140105197Ssam break; 7141105197Ssam case ADDR: 7142105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7143105197Ssam if (len < baselen + sal) 7144105197Ssam return EINVAL; 7145105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7146105197Ssam return EINVAL; 7147105197Ssam break; 7148105197Ssam } 7149105197Ssam 7150105197Ssam return 0; 7151105197Ssam} 7152105197Ssam 7153105197Ssamvoid 7154180086Sjuliankey_init(void) 7155105197Ssam{ 7156183550Szec INIT_VNET_IPSEC(curvnet); 7157105197Ssam int i; 7158105197Ssam 7159185088Szec V_key_debug_level = 0; 7160185088Szec V_key_spi_trycnt = 1000; 7161185088Szec V_key_spi_minval = 0x100; 7162185088Szec V_key_spi_maxval = 0x0fffffff; /* XXX */ 7163185088Szec V_policy_id = 0; 7164185088Szec V_key_int_random = 60; /*interval to initialize randseed,1(m)*/ 7165185088Szec V_key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 7166185088Szec V_key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 7167185088Szec V_key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 7168185088Szec V_key_preferred_oldsa = 1; /* preferred old sa rather than new sa*/ 7169185088Szec 7170185088Szec V_acq_seq = 0; 7171185088Szec 7172185088Szec V_ipsec_esp_keymin = 256; 7173185088Szec V_ipsec_esp_auth = 0; 7174185088Szec V_ipsec_ah_keymin = 128; 7175185088Szec 7176119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7177181803Sbz LIST_INIT(&V_sptree[i]); 7178105197Ssam 7179181803Sbz LIST_INIT(&V_sahtree); 7180105197Ssam 7181119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7182181803Sbz LIST_INIT(&V_regtree[i]); 7183105197Ssam 7184181803Sbz LIST_INIT(&V_acqtree); 7185181803Sbz LIST_INIT(&V_spacqtree); 7186105197Ssam 7187105197Ssam /* system default */ 7188181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7189181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7190105197Ssam 7191190787Szec if (!IS_DEFAULT_VNET(curvnet)) 7192190787Szec return; 7193190787Szec 7194190787Szec SPTREE_LOCK_INIT(); 7195190787Szec REGTREE_LOCK_INIT(); 7196190787Szec SAHTREE_LOCK_INIT(); 7197190787Szec ACQ_LOCK_INIT(); 7198190787Szec SPACQ_LOCK_INIT(); 7199190787Szec 7200105197Ssam#ifndef IPSEC_DEBUG2 7201105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7202105197Ssam#endif /*IPSEC_DEBUG2*/ 7203105197Ssam 7204105197Ssam /* initialize key statistics */ 7205105197Ssam keystat.getspi_count = 1; 7206105197Ssam 7207177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7208105197Ssam 7209105197Ssam return; 7210105197Ssam} 7211105197Ssam 7212105197Ssam/* 7213105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7214105197Ssam * 7215105197Ssam * Special check for tunnel-mode packets. 7216105197Ssam * We must make some checks for consistency between inner and outer IP header. 7217105197Ssam * 7218105197Ssam * xxx more checks to be provided 7219105197Ssam */ 7220105197Ssamint 7221105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7222105197Ssam struct secasvar *sav; 7223105197Ssam u_int family; 7224105197Ssam caddr_t src; 7225105197Ssam caddr_t dst; 7226105197Ssam{ 7227120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7228105197Ssam 7229105197Ssam /* XXX: check inner IP header */ 7230105197Ssam 7231105197Ssam return 1; 7232105197Ssam} 7233105197Ssam 7234105197Ssam/* record data transfer on SA, and update timestamps */ 7235105197Ssamvoid 7236105197Ssamkey_sa_recordxfer(sav, m) 7237105197Ssam struct secasvar *sav; 7238105197Ssam struct mbuf *m; 7239105197Ssam{ 7240120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7241120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7242105197Ssam if (!sav->lft_c) 7243105197Ssam return; 7244105197Ssam 7245105197Ssam /* 7246105197Ssam * XXX Currently, there is a difference of bytes size 7247105197Ssam * between inbound and outbound processing. 7248105197Ssam */ 7249157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7250105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7251105197Ssam 7252105197Ssam /* 7253105197Ssam * We use the number of packets as the unit of 7254157123Sgnn * allocations. We increment the variable 7255105197Ssam * whenever {esp,ah}_{in,out}put is called. 7256105197Ssam */ 7257157123Sgnn sav->lft_c->allocations++; 7258105197Ssam /* XXX check for expires? */ 7259105197Ssam 7260105197Ssam /* 7261157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7262105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7263157123Sgnn * difference (again in seconds) from usetime. 7264105197Ssam * 7265105197Ssam * usetime 7266105197Ssam * v expire expire 7267105197Ssam * -----+-----+--------+---> t 7268105197Ssam * <--------------> HARD 7269105197Ssam * <-----> SOFT 7270105197Ssam */ 7271157123Sgnn sav->lft_c->usetime = time_second; 7272105197Ssam /* XXX check for expires? */ 7273105197Ssam 7274105197Ssam return; 7275105197Ssam} 7276105197Ssam 7277105197Ssam/* dumb version */ 7278105197Ssamvoid 7279105197Ssamkey_sa_routechange(dst) 7280105197Ssam struct sockaddr *dst; 7281105197Ssam{ 7282183550Szec INIT_VNET_IPSEC(curvnet); 7283105197Ssam struct secashead *sah; 7284105197Ssam struct route *ro; 7285105197Ssam 7286120585Ssam SAHTREE_LOCK(); 7287181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7288105197Ssam ro = &sah->sa_route; 7289105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7290105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7291105197Ssam RTFREE(ro->ro_rt); 7292105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7293105197Ssam } 7294105197Ssam } 7295120585Ssam SAHTREE_UNLOCK(); 7296105197Ssam} 7297105197Ssam 7298105197Ssamstatic void 7299189004Srdivackykey_sa_chgstate(struct secasvar *sav, u_int8_t state) 7300105197Ssam{ 7301120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7302120585Ssam SAHTREE_LOCK_ASSERT(); 7303105197Ssam 7304119643Ssam if (sav->state != state) { 7305119643Ssam if (__LIST_CHAINED(sav)) 7306119643Ssam LIST_REMOVE(sav, chain); 7307119643Ssam sav->state = state; 7308119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7309119643Ssam } 7310105197Ssam} 7311105197Ssam 7312105197Ssamvoid 7313105197Ssamkey_sa_stir_iv(sav) 7314105197Ssam struct secasvar *sav; 7315105197Ssam{ 7316105197Ssam 7317120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7318105197Ssam key_randomfill(sav->iv, sav->ivlen); 7319105197Ssam} 7320105197Ssam 7321105197Ssam/* XXX too much? */ 7322105197Ssamstatic struct mbuf * 7323105197Ssamkey_alloc_mbuf(l) 7324105197Ssam int l; 7325105197Ssam{ 7326105197Ssam struct mbuf *m = NULL, *n; 7327105197Ssam int len, t; 7328105197Ssam 7329105197Ssam len = l; 7330105197Ssam while (len > 0) { 7331111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7332105197Ssam if (n && len > MLEN) 7333111119Simp MCLGET(n, M_DONTWAIT); 7334105197Ssam if (!n) { 7335105197Ssam m_freem(m); 7336105197Ssam return NULL; 7337105197Ssam } 7338105197Ssam 7339105197Ssam n->m_next = NULL; 7340105197Ssam n->m_len = 0; 7341105197Ssam n->m_len = M_TRAILINGSPACE(n); 7342105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7343105197Ssam if (n->m_len > len) { 7344105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7345105197Ssam n->m_data += t; 7346105197Ssam n->m_len = len; 7347105197Ssam } 7348105197Ssam 7349105197Ssam len -= n->m_len; 7350105197Ssam 7351105197Ssam if (m) 7352105197Ssam m_cat(m, n); 7353105197Ssam else 7354105197Ssam m = n; 7355105197Ssam } 7356105197Ssam 7357105197Ssam return m; 7358105197Ssam} 7359157123Sgnn 7360157123Sgnn/* 7361157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 7362157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 7363157123Sgnn * application in user land. 7364157123Sgnn * 7365157123Sgnn * IN: 7366157123Sgnn * src: A pointer to a kernel security key. 7367157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 7368157123Sgnn * OUT: 7369157123Sgnn * a valid mbuf or NULL indicating an error 7370157123Sgnn * 7371157123Sgnn */ 7372157123Sgnn 7373157123Sgnnstatic struct mbuf * 7374157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 7375157123Sgnn{ 7376157123Sgnn struct mbuf *m; 7377157123Sgnn struct sadb_key *p; 7378170799Sbz int len; 7379157123Sgnn 7380157123Sgnn if (src == NULL) 7381157123Sgnn return NULL; 7382157123Sgnn 7383170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 7384157123Sgnn m = key_alloc_mbuf(len); 7385157123Sgnn if (m == NULL) 7386157123Sgnn return NULL; 7387157123Sgnn p = mtod(m, struct sadb_key *); 7388157123Sgnn bzero(p, len); 7389157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 7390157123Sgnn p->sadb_key_exttype = exttype; 7391157123Sgnn p->sadb_key_bits = src->bits; 7392157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 7393157123Sgnn 7394157123Sgnn return m; 7395157123Sgnn} 7396157123Sgnn 7397157123Sgnn/* 7398157123Sgnn * Take one of the kernel's lifetime data structures and convert it 7399157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 7400157123Sgnn * a waiting application in user land. 7401157123Sgnn * 7402157123Sgnn * IN: 7403157123Sgnn * src: A pointer to a kernel lifetime structure. 7404157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 7405157123Sgnn * data structures for more information. 7406157123Sgnn * OUT: 7407157123Sgnn * a valid mbuf or NULL indicating an error 7408157123Sgnn * 7409157123Sgnn */ 7410157123Sgnn 7411157123Sgnnstatic struct mbuf * 7412157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 7413157123Sgnn{ 7414157123Sgnn struct mbuf *m = NULL; 7415157123Sgnn struct sadb_lifetime *p; 7416157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 7417157123Sgnn 7418157123Sgnn if (src == NULL) 7419157123Sgnn return NULL; 7420157123Sgnn 7421157123Sgnn m = key_alloc_mbuf(len); 7422157123Sgnn if (m == NULL) 7423157123Sgnn return m; 7424157123Sgnn p = mtod(m, struct sadb_lifetime *); 7425157123Sgnn 7426157123Sgnn bzero(p, len); 7427157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 7428157123Sgnn p->sadb_lifetime_exttype = exttype; 7429157123Sgnn p->sadb_lifetime_allocations = src->allocations; 7430157123Sgnn p->sadb_lifetime_bytes = src->bytes; 7431157123Sgnn p->sadb_lifetime_addtime = src->addtime; 7432157123Sgnn p->sadb_lifetime_usetime = src->usetime; 7433157123Sgnn 7434157123Sgnn return m; 7435157123Sgnn 7436157123Sgnn} 7437