key.c revision 193731
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 193731 2009-06-08 17:15:40Z zec $ */ 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; 2399192882Svanhu SPTREE_LOCK(); 2400105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2401181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2402105197Ssam cnt++; 2403105197Ssam } 2404105197Ssam } 2405105197Ssam 2406192882Svanhu if (cnt == 0) { 2407192882Svanhu SPTREE_UNLOCK(); 2408105197Ssam return key_senderror(so, m, ENOENT); 2409192882Svanhu } 2410105197Ssam 2411105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2412181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2413105197Ssam --cnt; 2414105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2415105197Ssam mhp->msg->sadb_msg_pid); 2416105197Ssam 2417105197Ssam if (n) 2418105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2419105197Ssam } 2420105197Ssam } 2421105197Ssam 2422192882Svanhu SPTREE_UNLOCK(); 2423105197Ssam m_freem(m); 2424105197Ssam return 0; 2425105197Ssam} 2426105197Ssam 2427105197Ssamstatic struct mbuf * 2428189004Srdivackykey_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2429105197Ssam{ 2430105197Ssam struct mbuf *result = NULL, *m; 2431181330Svanhu struct seclifetime lt; 2432105197Ssam 2433105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2434105197Ssam if (!m) 2435105197Ssam goto fail; 2436105197Ssam result = m; 2437105197Ssam 2438105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2439105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2440105197Ssam sp->spidx.ul_proto); 2441105197Ssam if (!m) 2442105197Ssam goto fail; 2443105197Ssam m_cat(result, m); 2444105197Ssam 2445105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2446105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2447105197Ssam sp->spidx.ul_proto); 2448105197Ssam if (!m) 2449105197Ssam goto fail; 2450105197Ssam m_cat(result, m); 2451105197Ssam 2452105197Ssam m = key_sp2msg(sp); 2453105197Ssam if (!m) 2454105197Ssam goto fail; 2455105197Ssam m_cat(result, m); 2456105197Ssam 2457181330Svanhu if(sp->lifetime){ 2458181330Svanhu lt.addtime=sp->created; 2459181330Svanhu lt.usetime= sp->lastused; 2460181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2461181330Svanhu if (!m) 2462181330Svanhu goto fail; 2463181330Svanhu m_cat(result, m); 2464181330Svanhu 2465181330Svanhu lt.addtime=sp->lifetime; 2466181330Svanhu lt.usetime= sp->validtime; 2467181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2468181330Svanhu if (!m) 2469181330Svanhu goto fail; 2470181330Svanhu m_cat(result, m); 2471181330Svanhu } 2472181330Svanhu 2473105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2474105197Ssam goto fail; 2475105197Ssam 2476105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2477105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2478105197Ssam if (result == NULL) 2479105197Ssam goto fail; 2480105197Ssam } 2481105197Ssam 2482105197Ssam result->m_pkthdr.len = 0; 2483105197Ssam for (m = result; m; m = m->m_next) 2484105197Ssam result->m_pkthdr.len += m->m_len; 2485105197Ssam 2486105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2487105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2488105197Ssam 2489105197Ssam return result; 2490105197Ssam 2491105197Ssamfail: 2492105197Ssam m_freem(result); 2493105197Ssam return NULL; 2494105197Ssam} 2495105197Ssam 2496105197Ssam/* 2497105197Ssam * get PFKEY message length for security policy and request. 2498105197Ssam */ 2499105197Ssamstatic u_int 2500105197Ssamkey_getspreqmsglen(sp) 2501105197Ssam struct secpolicy *sp; 2502105197Ssam{ 2503105197Ssam u_int tlen; 2504105197Ssam 2505105197Ssam tlen = sizeof(struct sadb_x_policy); 2506105197Ssam 2507105197Ssam /* if is the policy for ipsec ? */ 2508105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2509105197Ssam return tlen; 2510105197Ssam 2511105197Ssam /* get length of ipsec requests */ 2512105197Ssam { 2513105197Ssam struct ipsecrequest *isr; 2514105197Ssam int len; 2515105197Ssam 2516105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2517105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2518105197Ssam + isr->saidx.src.sa.sa_len 2519105197Ssam + isr->saidx.dst.sa.sa_len; 2520105197Ssam 2521105197Ssam tlen += PFKEY_ALIGN8(len); 2522105197Ssam } 2523105197Ssam } 2524105197Ssam 2525105197Ssam return tlen; 2526105197Ssam} 2527105197Ssam 2528105197Ssam/* 2529105197Ssam * SADB_SPDEXPIRE processing 2530105197Ssam * send 2531105197Ssam * <base, address(SD), lifetime(CH), policy> 2532105197Ssam * to KMD by PF_KEY. 2533105197Ssam * 2534105197Ssam * OUT: 0 : succeed 2535105197Ssam * others : error number 2536105197Ssam */ 2537105197Ssamstatic int 2538105197Ssamkey_spdexpire(sp) 2539105197Ssam struct secpolicy *sp; 2540105197Ssam{ 2541105197Ssam struct mbuf *result = NULL, *m; 2542105197Ssam int len; 2543105197Ssam int error = -1; 2544105197Ssam struct sadb_lifetime *lt; 2545105197Ssam 2546105197Ssam /* XXX: Why do we lock ? */ 2547105197Ssam 2548120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2549105197Ssam 2550105197Ssam /* set msg header */ 2551105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2552105197Ssam if (!m) { 2553105197Ssam error = ENOBUFS; 2554105197Ssam goto fail; 2555105197Ssam } 2556105197Ssam result = m; 2557105197Ssam 2558105197Ssam /* create lifetime extension (current and hard) */ 2559105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2560105197Ssam m = key_alloc_mbuf(len); 2561105197Ssam if (!m || m->m_next) { /*XXX*/ 2562105197Ssam if (m) 2563105197Ssam m_freem(m); 2564105197Ssam error = ENOBUFS; 2565105197Ssam goto fail; 2566105197Ssam } 2567105197Ssam bzero(mtod(m, caddr_t), len); 2568105197Ssam lt = mtod(m, struct sadb_lifetime *); 2569105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2570105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2571105197Ssam lt->sadb_lifetime_allocations = 0; 2572105197Ssam lt->sadb_lifetime_bytes = 0; 2573105197Ssam lt->sadb_lifetime_addtime = sp->created; 2574105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2575105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2576105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2577105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2578105197Ssam lt->sadb_lifetime_allocations = 0; 2579105197Ssam lt->sadb_lifetime_bytes = 0; 2580105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2581105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2582105197Ssam m_cat(result, m); 2583105197Ssam 2584105197Ssam /* set sadb_address for source */ 2585105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2586105197Ssam &sp->spidx.src.sa, 2587105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2588105197Ssam if (!m) { 2589105197Ssam error = ENOBUFS; 2590105197Ssam goto fail; 2591105197Ssam } 2592105197Ssam m_cat(result, m); 2593105197Ssam 2594105197Ssam /* set sadb_address for destination */ 2595105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2596105197Ssam &sp->spidx.dst.sa, 2597105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2598105197Ssam if (!m) { 2599105197Ssam error = ENOBUFS; 2600105197Ssam goto fail; 2601105197Ssam } 2602105197Ssam m_cat(result, m); 2603105197Ssam 2604105197Ssam /* set secpolicy */ 2605105197Ssam m = key_sp2msg(sp); 2606105197Ssam if (!m) { 2607105197Ssam error = ENOBUFS; 2608105197Ssam goto fail; 2609105197Ssam } 2610105197Ssam m_cat(result, m); 2611105197Ssam 2612105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2613105197Ssam error = EINVAL; 2614105197Ssam goto fail; 2615105197Ssam } 2616105197Ssam 2617105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2618105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2619105197Ssam if (result == NULL) { 2620105197Ssam error = ENOBUFS; 2621105197Ssam goto fail; 2622105197Ssam } 2623105197Ssam } 2624105197Ssam 2625105197Ssam result->m_pkthdr.len = 0; 2626105197Ssam for (m = result; m; m = m->m_next) 2627105197Ssam result->m_pkthdr.len += m->m_len; 2628105197Ssam 2629105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2630105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2631105197Ssam 2632105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2633105197Ssam 2634105197Ssam fail: 2635105197Ssam if (result) 2636105197Ssam m_freem(result); 2637105197Ssam return error; 2638105197Ssam} 2639105197Ssam 2640105197Ssam/* %%% SAD management */ 2641105197Ssam/* 2642105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2643105197Ssam * OUT: NULL : failure due to the lack of memory. 2644105197Ssam * others : pointer to new SA head. 2645105197Ssam */ 2646105197Ssamstatic struct secashead * 2647105197Ssamkey_newsah(saidx) 2648105197Ssam struct secasindex *saidx; 2649105197Ssam{ 2650183550Szec INIT_VNET_IPSEC(curvnet); 2651105197Ssam struct secashead *newsah; 2652105197Ssam 2653120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2654105197Ssam 2655119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2656105197Ssam if (newsah != NULL) { 2657105197Ssam int i; 2658105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2659105197Ssam LIST_INIT(&newsah->savtree[i]); 2660105197Ssam newsah->saidx = *saidx; 2661105197Ssam 2662105197Ssam /* add to saidxtree */ 2663105197Ssam newsah->state = SADB_SASTATE_MATURE; 2664119643Ssam 2665120585Ssam SAHTREE_LOCK(); 2666181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2667120585Ssam SAHTREE_UNLOCK(); 2668105197Ssam } 2669105197Ssam return(newsah); 2670105197Ssam} 2671105197Ssam 2672105197Ssam/* 2673105197Ssam * delete SA index and all SA registerd. 2674105197Ssam */ 2675105197Ssamstatic void 2676105197Ssamkey_delsah(sah) 2677105197Ssam struct secashead *sah; 2678105197Ssam{ 2679183550Szec INIT_VNET_IPSEC(curvnet); 2680105197Ssam struct secasvar *sav, *nextsav; 2681120585Ssam u_int stateidx; 2682105197Ssam int zombie = 0; 2683105197Ssam 2684120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2685120585Ssam SAHTREE_LOCK_ASSERT(); 2686105197Ssam 2687105197Ssam /* searching all SA registerd in the secindex. */ 2688105197Ssam for (stateidx = 0; 2689185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2690105197Ssam stateidx++) { 2691185348Szec u_int state = saorder_state_any[stateidx]; 2692120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2693105197Ssam if (sav->refcnt == 0) { 2694105197Ssam /* sanity check */ 2695120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2696190071Svanhu /* 2697190071Svanhu * do NOT call KEY_FREESAV here: 2698190071Svanhu * it will only delete the sav if refcnt == 1, 2699189962Svanhu * where we already know that refcnt == 0 2700189962Svanhu */ 2701189962Svanhu key_delsav(sav); 2702105197Ssam } else { 2703105197Ssam /* give up to delete this sa */ 2704105197Ssam zombie++; 2705105197Ssam } 2706105197Ssam } 2707105197Ssam } 2708120585Ssam if (!zombie) { /* delete only if there are savs */ 2709120585Ssam /* remove from tree of SA index */ 2710120585Ssam if (__LIST_CHAINED(sah)) 2711120585Ssam LIST_REMOVE(sah, chain); 2712120585Ssam if (sah->sa_route.ro_rt) { 2713120585Ssam RTFREE(sah->sa_route.ro_rt); 2714120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2715120585Ssam } 2716120585Ssam free(sah, M_IPSEC_SAH); 2717105197Ssam } 2718105197Ssam} 2719105197Ssam 2720105197Ssam/* 2721105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2722105197Ssam * and copy the values of mhp into new buffer. 2723105197Ssam * When SAD message type is GETSPI: 2724105197Ssam * to set sequence number from acq_seq++, 2725105197Ssam * to set zero to SPI. 2726105197Ssam * not to call key_setsava(). 2727105197Ssam * OUT: NULL : fail 2728105197Ssam * others : pointer to new secasvar. 2729105197Ssam * 2730105197Ssam * does not modify mbuf. does not free mbuf on error. 2731105197Ssam */ 2732105197Ssamstatic struct secasvar * 2733105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2734105197Ssam struct mbuf *m; 2735105197Ssam const struct sadb_msghdr *mhp; 2736105197Ssam struct secashead *sah; 2737105197Ssam int *errp; 2738105197Ssam const char* where; 2739105197Ssam int tag; 2740105197Ssam{ 2741183550Szec INIT_VNET_IPSEC(curvnet); 2742105197Ssam struct secasvar *newsav; 2743105197Ssam const struct sadb_sa *xsa; 2744105197Ssam 2745120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2746120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2747120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2748120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2749105197Ssam 2750119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2751105197Ssam if (newsav == NULL) { 2752120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2753105197Ssam *errp = ENOBUFS; 2754105197Ssam goto done; 2755105197Ssam } 2756105197Ssam 2757105197Ssam switch (mhp->msg->sadb_msg_type) { 2758105197Ssam case SADB_GETSPI: 2759105197Ssam newsav->spi = 0; 2760105197Ssam 2761105197Ssam#ifdef IPSEC_DOSEQCHECK 2762105197Ssam /* sync sequence number */ 2763105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2764105197Ssam newsav->seq = 2765181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2766105197Ssam else 2767105197Ssam#endif 2768105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2769105197Ssam break; 2770105197Ssam 2771105197Ssam case SADB_ADD: 2772105197Ssam /* sanity check */ 2773105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2774119643Ssam free(newsav, M_IPSEC_SA); 2775119643Ssam newsav = NULL; 2776120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2777120585Ssam __func__)); 2778105197Ssam *errp = EINVAL; 2779105197Ssam goto done; 2780105197Ssam } 2781105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2782105197Ssam newsav->spi = xsa->sadb_sa_spi; 2783105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2784105197Ssam break; 2785105197Ssam default: 2786119643Ssam free(newsav, M_IPSEC_SA); 2787119643Ssam newsav = NULL; 2788105197Ssam *errp = EINVAL; 2789105197Ssam goto done; 2790105197Ssam } 2791105197Ssam 2792119643Ssam 2793105197Ssam /* copy sav values */ 2794105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2795105197Ssam *errp = key_setsaval(newsav, m, mhp); 2796105197Ssam if (*errp) { 2797119643Ssam free(newsav, M_IPSEC_SA); 2798119643Ssam newsav = NULL; 2799105197Ssam goto done; 2800105197Ssam } 2801105197Ssam } 2802105197Ssam 2803120585Ssam SECASVAR_LOCK_INIT(newsav); 2804119643Ssam 2805105197Ssam /* reset created */ 2806105197Ssam newsav->created = time_second; 2807105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2808105197Ssam 2809105197Ssam /* add to satree */ 2810105197Ssam newsav->sah = sah; 2811158767Spjd sa_initref(newsav); 2812105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2813119643Ssam 2814119643Ssam /* XXX locking??? */ 2815105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2816105197Ssam secasvar, chain); 2817105197Ssamdone: 2818105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2819120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2820105197Ssam where, tag, newsav)); 2821105197Ssam 2822105197Ssam return newsav; 2823105197Ssam} 2824105197Ssam 2825105197Ssam/* 2826105197Ssam * free() SA variable entry. 2827105197Ssam */ 2828105197Ssamstatic void 2829119643Ssamkey_cleansav(struct secasvar *sav) 2830105197Ssam{ 2831117051Ssam /* 2832117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2833117051Ssam * keys to be cleared; otherwise we must do it ourself. 2834117051Ssam */ 2835117051Ssam if (sav->tdb_xform != NULL) { 2836117051Ssam sav->tdb_xform->xf_zeroize(sav); 2837117051Ssam sav->tdb_xform = NULL; 2838117051Ssam } else { 2839120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2840117051Ssam if (sav->key_auth != NULL) 2841157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2842117051Ssam if (sav->key_enc != NULL) 2843157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2844117051Ssam } 2845105197Ssam if (sav->key_auth != NULL) { 2846157123Sgnn if (sav->key_auth->key_data != NULL) 2847157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2848119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2849105197Ssam sav->key_auth = NULL; 2850105197Ssam } 2851105197Ssam if (sav->key_enc != NULL) { 2852157123Sgnn if (sav->key_enc->key_data != NULL) 2853157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2854119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2855105197Ssam sav->key_enc = NULL; 2856105197Ssam } 2857105197Ssam if (sav->sched) { 2858105197Ssam bzero(sav->sched, sav->schedlen); 2859119643Ssam free(sav->sched, M_IPSEC_MISC); 2860105197Ssam sav->sched = NULL; 2861105197Ssam } 2862105197Ssam if (sav->replay != NULL) { 2863119643Ssam free(sav->replay, M_IPSEC_MISC); 2864105197Ssam sav->replay = NULL; 2865105197Ssam } 2866105197Ssam if (sav->lft_c != NULL) { 2867119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2868105197Ssam sav->lft_c = NULL; 2869105197Ssam } 2870105197Ssam if (sav->lft_h != NULL) { 2871119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2872105197Ssam sav->lft_h = NULL; 2873105197Ssam } 2874105197Ssam if (sav->lft_s != NULL) { 2875119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2876105197Ssam sav->lft_s = NULL; 2877105197Ssam } 2878119643Ssam} 2879105197Ssam 2880119643Ssam/* 2881119643Ssam * free() SA variable entry. 2882119643Ssam */ 2883119643Ssamstatic void 2884119643Ssamkey_delsav(sav) 2885119643Ssam struct secasvar *sav; 2886119643Ssam{ 2887120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2888120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2889105197Ssam 2890119643Ssam /* remove from SA header */ 2891119643Ssam if (__LIST_CHAINED(sav)) 2892119643Ssam LIST_REMOVE(sav, chain); 2893119643Ssam key_cleansav(sav); 2894120585Ssam SECASVAR_LOCK_DESTROY(sav); 2895119643Ssam free(sav, M_IPSEC_SA); 2896105197Ssam} 2897105197Ssam 2898105197Ssam/* 2899105197Ssam * search SAD. 2900105197Ssam * OUT: 2901105197Ssam * NULL : not found 2902105197Ssam * others : found, pointer to a SA. 2903105197Ssam */ 2904105197Ssamstatic struct secashead * 2905105197Ssamkey_getsah(saidx) 2906105197Ssam struct secasindex *saidx; 2907105197Ssam{ 2908183550Szec INIT_VNET_IPSEC(curvnet); 2909105197Ssam struct secashead *sah; 2910105197Ssam 2911120585Ssam SAHTREE_LOCK(); 2912181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2913105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2914105197Ssam continue; 2915105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2916119643Ssam break; 2917105197Ssam } 2918120585Ssam SAHTREE_UNLOCK(); 2919105197Ssam 2920119643Ssam return sah; 2921105197Ssam} 2922105197Ssam 2923105197Ssam/* 2924105197Ssam * check not to be duplicated SPI. 2925105197Ssam * NOTE: this function is too slow due to searching all SAD. 2926105197Ssam * OUT: 2927105197Ssam * NULL : not found 2928105197Ssam * others : found, pointer to a SA. 2929105197Ssam */ 2930105197Ssamstatic struct secasvar * 2931105197Ssamkey_checkspidup(saidx, spi) 2932105197Ssam struct secasindex *saidx; 2933105197Ssam u_int32_t spi; 2934105197Ssam{ 2935183550Szec INIT_VNET_IPSEC(curvnet); 2936105197Ssam struct secashead *sah; 2937105197Ssam struct secasvar *sav; 2938105197Ssam 2939105197Ssam /* check address family */ 2940105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2941120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2942120585Ssam __func__)); 2943105197Ssam return NULL; 2944105197Ssam } 2945105197Ssam 2946119643Ssam sav = NULL; 2947105197Ssam /* check all SAD */ 2948120585Ssam SAHTREE_LOCK(); 2949181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2950105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2951105197Ssam continue; 2952105197Ssam sav = key_getsavbyspi(sah, spi); 2953105197Ssam if (sav != NULL) 2954119643Ssam break; 2955105197Ssam } 2956120585Ssam SAHTREE_UNLOCK(); 2957105197Ssam 2958119643Ssam return sav; 2959105197Ssam} 2960105197Ssam 2961105197Ssam/* 2962105197Ssam * search SAD litmited alive SA, protocol, SPI. 2963105197Ssam * OUT: 2964105197Ssam * NULL : not found 2965105197Ssam * others : found, pointer to a SA. 2966105197Ssam */ 2967105197Ssamstatic struct secasvar * 2968105197Ssamkey_getsavbyspi(sah, spi) 2969105197Ssam struct secashead *sah; 2970105197Ssam u_int32_t spi; 2971105197Ssam{ 2972183550Szec INIT_VNET_IPSEC(curvnet); 2973105197Ssam struct secasvar *sav; 2974105197Ssam u_int stateidx, state; 2975105197Ssam 2976119643Ssam sav = NULL; 2977120585Ssam SAHTREE_LOCK_ASSERT(); 2978105197Ssam /* search all status */ 2979105197Ssam for (stateidx = 0; 2980185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 2981105197Ssam stateidx++) { 2982105197Ssam 2983185348Szec state = saorder_state_alive[stateidx]; 2984105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 2985105197Ssam 2986105197Ssam /* sanity check */ 2987105197Ssam if (sav->state != state) { 2988120585Ssam ipseclog((LOG_DEBUG, "%s: " 2989105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 2990120585Ssam __func__, state, sav->state)); 2991105197Ssam continue; 2992105197Ssam } 2993105197Ssam 2994105197Ssam if (sav->spi == spi) 2995128859Ssam return sav; 2996105197Ssam } 2997105197Ssam } 2998105197Ssam 2999128859Ssam return NULL; 3000105197Ssam} 3001105197Ssam 3002105197Ssam/* 3003105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3004105197Ssam * You must update these if need. 3005105197Ssam * OUT: 0: success. 3006105197Ssam * !0: failure. 3007105197Ssam * 3008105197Ssam * does not modify mbuf. does not free mbuf on error. 3009105197Ssam */ 3010105197Ssamstatic int 3011105197Ssamkey_setsaval(sav, m, mhp) 3012105197Ssam struct secasvar *sav; 3013105197Ssam struct mbuf *m; 3014105197Ssam const struct sadb_msghdr *mhp; 3015105197Ssam{ 3016183550Szec INIT_VNET_IPSEC(curvnet); 3017105197Ssam int error = 0; 3018105197Ssam 3019120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3020120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3021120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3022105197Ssam 3023105197Ssam /* initialization */ 3024105197Ssam sav->replay = NULL; 3025105197Ssam sav->key_auth = NULL; 3026105197Ssam sav->key_enc = NULL; 3027105197Ssam sav->sched = NULL; 3028105197Ssam sav->schedlen = 0; 3029105197Ssam sav->iv = NULL; 3030105197Ssam sav->lft_c = NULL; 3031105197Ssam sav->lft_h = NULL; 3032105197Ssam sav->lft_s = NULL; 3033105197Ssam sav->tdb_xform = NULL; /* transform */ 3034105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3035105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3036105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3037105197Ssam 3038105197Ssam /* SA */ 3039105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3040105197Ssam const struct sadb_sa *sa0; 3041105197Ssam 3042105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3043105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3044105197Ssam error = EINVAL; 3045105197Ssam goto fail; 3046105197Ssam } 3047105197Ssam 3048105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3049105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3050105197Ssam sav->flags = sa0->sadb_sa_flags; 3051105197Ssam 3052105197Ssam /* replay window */ 3053105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3054105197Ssam sav->replay = (struct secreplay *) 3055119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3056105197Ssam if (sav->replay == NULL) { 3057120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3058120585Ssam __func__)); 3059105197Ssam error = ENOBUFS; 3060105197Ssam goto fail; 3061105197Ssam } 3062105197Ssam if (sa0->sadb_sa_replay != 0) 3063105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3064105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3065105197Ssam } 3066105197Ssam } 3067105197Ssam 3068105197Ssam /* Authentication keys */ 3069105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3070105197Ssam const struct sadb_key *key0; 3071105197Ssam int len; 3072105197Ssam 3073105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3074105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3075105197Ssam 3076105197Ssam error = 0; 3077105197Ssam if (len < sizeof(*key0)) { 3078105197Ssam error = EINVAL; 3079105197Ssam goto fail; 3080105197Ssam } 3081105197Ssam switch (mhp->msg->sadb_msg_satype) { 3082105197Ssam case SADB_SATYPE_AH: 3083105197Ssam case SADB_SATYPE_ESP: 3084125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3085105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3086105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3087105197Ssam error = EINVAL; 3088105197Ssam break; 3089105197Ssam case SADB_X_SATYPE_IPCOMP: 3090105197Ssam default: 3091105197Ssam error = EINVAL; 3092105197Ssam break; 3093105197Ssam } 3094105197Ssam if (error) { 3095120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3096120585Ssam __func__)); 3097105197Ssam goto fail; 3098105197Ssam } 3099105197Ssam 3100157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3101157123Sgnn M_IPSEC_MISC); 3102157123Sgnn if (sav->key_auth == NULL ) { 3103157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3104157123Sgnn __func__)); 3105105197Ssam error = ENOBUFS; 3106105197Ssam goto fail; 3107105197Ssam } 3108105197Ssam } 3109105197Ssam 3110105197Ssam /* Encryption key */ 3111105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3112105197Ssam const struct sadb_key *key0; 3113105197Ssam int len; 3114105197Ssam 3115105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3116105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3117105197Ssam 3118105197Ssam error = 0; 3119105197Ssam if (len < sizeof(*key0)) { 3120105197Ssam error = EINVAL; 3121105197Ssam goto fail; 3122105197Ssam } 3123105197Ssam switch (mhp->msg->sadb_msg_satype) { 3124105197Ssam case SADB_SATYPE_ESP: 3125105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3126105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3127105197Ssam error = EINVAL; 3128105197Ssam break; 3129105197Ssam } 3130157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3131157123Sgnn len, 3132157123Sgnn M_IPSEC_MISC); 3133105197Ssam if (sav->key_enc == NULL) { 3134120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3135120585Ssam __func__)); 3136105197Ssam error = ENOBUFS; 3137105197Ssam goto fail; 3138105197Ssam } 3139105197Ssam break; 3140105197Ssam case SADB_X_SATYPE_IPCOMP: 3141105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3142105197Ssam error = EINVAL; 3143105197Ssam sav->key_enc = NULL; /*just in case*/ 3144105197Ssam break; 3145105197Ssam case SADB_SATYPE_AH: 3146125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3147105197Ssam default: 3148105197Ssam error = EINVAL; 3149105197Ssam break; 3150105197Ssam } 3151105197Ssam if (error) { 3152120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3153120585Ssam __func__)); 3154105197Ssam goto fail; 3155105197Ssam } 3156105197Ssam } 3157105197Ssam 3158105197Ssam /* set iv */ 3159105197Ssam sav->ivlen = 0; 3160105197Ssam 3161105197Ssam switch (mhp->msg->sadb_msg_satype) { 3162105197Ssam case SADB_SATYPE_AH: 3163105197Ssam error = xform_init(sav, XF_AH); 3164105197Ssam break; 3165105197Ssam case SADB_SATYPE_ESP: 3166105197Ssam error = xform_init(sav, XF_ESP); 3167105197Ssam break; 3168105197Ssam case SADB_X_SATYPE_IPCOMP: 3169105197Ssam error = xform_init(sav, XF_IPCOMP); 3170105197Ssam break; 3171125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3172125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3173125680Sbms break; 3174105197Ssam } 3175105197Ssam if (error) { 3176120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3177120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3178105197Ssam goto fail; 3179105197Ssam } 3180105197Ssam 3181105197Ssam /* reset created */ 3182105197Ssam sav->created = time_second; 3183105197Ssam 3184105197Ssam /* make lifetime for CURRENT */ 3185176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3186105197Ssam if (sav->lft_c == NULL) { 3187120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3188105197Ssam error = ENOBUFS; 3189105197Ssam goto fail; 3190105197Ssam } 3191105197Ssam 3192157123Sgnn sav->lft_c->allocations = 0; 3193157123Sgnn sav->lft_c->bytes = 0; 3194157123Sgnn sav->lft_c->addtime = time_second; 3195157123Sgnn sav->lft_c->usetime = 0; 3196105197Ssam 3197105197Ssam /* lifetimes for HARD and SOFT */ 3198105197Ssam { 3199105197Ssam const struct sadb_lifetime *lft0; 3200105197Ssam 3201105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3202105197Ssam if (lft0 != NULL) { 3203105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3204105197Ssam error = EINVAL; 3205105197Ssam goto fail; 3206105197Ssam } 3207157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3208105197Ssam if (sav->lft_h == NULL) { 3209120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3210105197Ssam error = ENOBUFS; 3211105197Ssam goto fail; 3212105197Ssam } 3213105197Ssam /* to be initialize ? */ 3214105197Ssam } 3215105197Ssam 3216105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3217105197Ssam if (lft0 != NULL) { 3218105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3219105197Ssam error = EINVAL; 3220105197Ssam goto fail; 3221105197Ssam } 3222157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3223105197Ssam if (sav->lft_s == NULL) { 3224120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3225105197Ssam error = ENOBUFS; 3226105197Ssam goto fail; 3227105197Ssam } 3228105197Ssam /* to be initialize ? */ 3229105197Ssam } 3230105197Ssam } 3231105197Ssam 3232105197Ssam return 0; 3233105197Ssam 3234105197Ssam fail: 3235105197Ssam /* initialization */ 3236119643Ssam key_cleansav(sav); 3237105197Ssam 3238105197Ssam return error; 3239105197Ssam} 3240105197Ssam 3241105197Ssam/* 3242105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3243105197Ssam * OUT: 0: valid 3244105197Ssam * other: errno 3245105197Ssam */ 3246105197Ssamstatic int 3247119643Ssamkey_mature(struct secasvar *sav) 3248105197Ssam{ 3249183550Szec INIT_VNET_IPSEC(curvnet); 3250105197Ssam int error; 3251105197Ssam 3252105197Ssam /* check SPI value */ 3253105197Ssam switch (sav->sah->saidx.proto) { 3254105197Ssam case IPPROTO_ESP: 3255105197Ssam case IPPROTO_AH: 3256170823Sbz /* 3257170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3258170823Sbz * 1-255 reserved by IANA for future use, 3259170823Sbz * 0 for implementation specific, local use. 3260170823Sbz */ 3261170823Sbz if (ntohl(sav->spi) <= 255) { 3262120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3263120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3264105197Ssam return EINVAL; 3265105197Ssam } 3266105197Ssam break; 3267105197Ssam } 3268105197Ssam 3269105197Ssam /* check satype */ 3270105197Ssam switch (sav->sah->saidx.proto) { 3271105197Ssam case IPPROTO_ESP: 3272105197Ssam /* check flags */ 3273105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3274105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3275120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3276120585Ssam "given to old-esp.\n", __func__)); 3277105197Ssam return EINVAL; 3278105197Ssam } 3279105197Ssam error = xform_init(sav, XF_ESP); 3280105197Ssam break; 3281105197Ssam case IPPROTO_AH: 3282105197Ssam /* check flags */ 3283105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3284120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3285120585Ssam "given to AH SA.\n", __func__)); 3286105197Ssam return EINVAL; 3287105197Ssam } 3288105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3289120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3290120585Ssam "mismated.\n", __func__)); 3291105197Ssam return(EINVAL); 3292105197Ssam } 3293105197Ssam error = xform_init(sav, XF_AH); 3294105197Ssam break; 3295105197Ssam case IPPROTO_IPCOMP: 3296105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3297120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3298120585Ssam "mismated.\n", __func__)); 3299105197Ssam return(EINVAL); 3300105197Ssam } 3301105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3302105197Ssam && ntohl(sav->spi) >= 0x10000) { 3303120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3304120585Ssam __func__)); 3305105197Ssam return(EINVAL); 3306105197Ssam } 3307105197Ssam error = xform_init(sav, XF_IPCOMP); 3308105197Ssam break; 3309125680Sbms case IPPROTO_TCP: 3310125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3311125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3312125680Sbms "mismated.\n", __func__)); 3313125680Sbms return(EINVAL); 3314125680Sbms } 3315125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3316125680Sbms break; 3317105197Ssam default: 3318120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3319105197Ssam error = EPROTONOSUPPORT; 3320105197Ssam break; 3321105197Ssam } 3322119643Ssam if (error == 0) { 3323120585Ssam SAHTREE_LOCK(); 3324105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3325120585Ssam SAHTREE_UNLOCK(); 3326119643Ssam } 3327105197Ssam return (error); 3328105197Ssam} 3329105197Ssam 3330105197Ssam/* 3331105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3332105197Ssam */ 3333105197Ssamstatic struct mbuf * 3334189004Srdivackykey_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3335189004Srdivacky u_int32_t seq, u_int32_t pid) 3336105197Ssam{ 3337105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3338105197Ssam int i; 3339105197Ssam int dumporder[] = { 3340105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3341105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3342105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3343105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3344105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3345105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3346105197Ssam }; 3347105197Ssam 3348105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3349105197Ssam if (m == NULL) 3350105197Ssam goto fail; 3351105197Ssam result = m; 3352105197Ssam 3353105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3354105197Ssam m = NULL; 3355105197Ssam switch (dumporder[i]) { 3356105197Ssam case SADB_EXT_SA: 3357105197Ssam m = key_setsadbsa(sav); 3358105197Ssam if (!m) 3359105197Ssam goto fail; 3360105197Ssam break; 3361105197Ssam 3362105197Ssam case SADB_X_EXT_SA2: 3363105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3364105197Ssam sav->replay ? sav->replay->count : 0, 3365105197Ssam sav->sah->saidx.reqid); 3366105197Ssam if (!m) 3367105197Ssam goto fail; 3368105197Ssam break; 3369105197Ssam 3370105197Ssam case SADB_EXT_ADDRESS_SRC: 3371105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3372105197Ssam &sav->sah->saidx.src.sa, 3373105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3374105197Ssam if (!m) 3375105197Ssam goto fail; 3376105197Ssam break; 3377105197Ssam 3378105197Ssam case SADB_EXT_ADDRESS_DST: 3379105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3380105197Ssam &sav->sah->saidx.dst.sa, 3381105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3382105197Ssam if (!m) 3383105197Ssam goto fail; 3384105197Ssam break; 3385105197Ssam 3386105197Ssam case SADB_EXT_KEY_AUTH: 3387105197Ssam if (!sav->key_auth) 3388105197Ssam continue; 3389157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3390157123Sgnn if (!m) 3391157123Sgnn goto fail; 3392105197Ssam break; 3393105197Ssam 3394105197Ssam case SADB_EXT_KEY_ENCRYPT: 3395105197Ssam if (!sav->key_enc) 3396105197Ssam continue; 3397157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3398157123Sgnn if (!m) 3399157123Sgnn goto fail; 3400105197Ssam break; 3401105197Ssam 3402105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3403105197Ssam if (!sav->lft_c) 3404105197Ssam continue; 3405157123Sgnn m = key_setlifetime(sav->lft_c, 3406157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3407157123Sgnn if (!m) 3408157123Sgnn goto fail; 3409105197Ssam break; 3410105197Ssam 3411105197Ssam case SADB_EXT_LIFETIME_HARD: 3412105197Ssam if (!sav->lft_h) 3413105197Ssam continue; 3414157123Sgnn m = key_setlifetime(sav->lft_h, 3415157123Sgnn SADB_EXT_LIFETIME_HARD); 3416157123Sgnn if (!m) 3417157123Sgnn goto fail; 3418105197Ssam break; 3419105197Ssam 3420105197Ssam case SADB_EXT_LIFETIME_SOFT: 3421105197Ssam if (!sav->lft_s) 3422105197Ssam continue; 3423177554Sbz m = key_setlifetime(sav->lft_s, 3424157123Sgnn SADB_EXT_LIFETIME_SOFT); 3425157123Sgnn 3426157123Sgnn if (!m) 3427157123Sgnn goto fail; 3428105197Ssam break; 3429105197Ssam 3430105197Ssam case SADB_EXT_ADDRESS_PROXY: 3431105197Ssam case SADB_EXT_IDENTITY_SRC: 3432105197Ssam case SADB_EXT_IDENTITY_DST: 3433105197Ssam /* XXX: should we brought from SPD ? */ 3434105197Ssam case SADB_EXT_SENSITIVITY: 3435105197Ssam default: 3436105197Ssam continue; 3437105197Ssam } 3438105197Ssam 3439157123Sgnn if (!m) 3440105197Ssam goto fail; 3441105197Ssam if (tres) 3442105197Ssam m_cat(m, tres); 3443105197Ssam tres = m; 3444157123Sgnn 3445105197Ssam } 3446105197Ssam 3447105197Ssam m_cat(result, tres); 3448105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3449105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3450105197Ssam if (result == NULL) 3451105197Ssam goto fail; 3452105197Ssam } 3453105197Ssam 3454105197Ssam result->m_pkthdr.len = 0; 3455105197Ssam for (m = result; m; m = m->m_next) 3456105197Ssam result->m_pkthdr.len += m->m_len; 3457105197Ssam 3458105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3459105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3460105197Ssam 3461105197Ssam return result; 3462105197Ssam 3463105197Ssamfail: 3464105197Ssam m_freem(result); 3465105197Ssam m_freem(tres); 3466105197Ssam return NULL; 3467105197Ssam} 3468105197Ssam 3469105197Ssam/* 3470105197Ssam * set data into sadb_msg. 3471105197Ssam */ 3472105197Ssamstatic struct mbuf * 3473189004Srdivackykey_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3474189004Srdivacky pid_t pid, u_int16_t reserved) 3475105197Ssam{ 3476105197Ssam struct mbuf *m; 3477105197Ssam struct sadb_msg *p; 3478105197Ssam int len; 3479105197Ssam 3480105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3481105197Ssam if (len > MCLBYTES) 3482105197Ssam return NULL; 3483111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3484105197Ssam if (m && len > MHLEN) { 3485111119Simp MCLGET(m, M_DONTWAIT); 3486105197Ssam if ((m->m_flags & M_EXT) == 0) { 3487105197Ssam m_freem(m); 3488105197Ssam m = NULL; 3489105197Ssam } 3490105197Ssam } 3491105197Ssam if (!m) 3492105197Ssam return NULL; 3493105197Ssam m->m_pkthdr.len = m->m_len = len; 3494105197Ssam m->m_next = NULL; 3495105197Ssam 3496105197Ssam p = mtod(m, struct sadb_msg *); 3497105197Ssam 3498105197Ssam bzero(p, len); 3499105197Ssam p->sadb_msg_version = PF_KEY_V2; 3500105197Ssam p->sadb_msg_type = type; 3501105197Ssam p->sadb_msg_errno = 0; 3502105197Ssam p->sadb_msg_satype = satype; 3503105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3504105197Ssam p->sadb_msg_reserved = reserved; 3505105197Ssam p->sadb_msg_seq = seq; 3506105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3507105197Ssam 3508105197Ssam return m; 3509105197Ssam} 3510105197Ssam 3511105197Ssam/* 3512105197Ssam * copy secasvar data into sadb_address. 3513105197Ssam */ 3514105197Ssamstatic struct mbuf * 3515105197Ssamkey_setsadbsa(sav) 3516105197Ssam struct secasvar *sav; 3517105197Ssam{ 3518105197Ssam struct mbuf *m; 3519105197Ssam struct sadb_sa *p; 3520105197Ssam int len; 3521105197Ssam 3522105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3523105197Ssam m = key_alloc_mbuf(len); 3524105197Ssam if (!m || m->m_next) { /*XXX*/ 3525105197Ssam if (m) 3526105197Ssam m_freem(m); 3527105197Ssam return NULL; 3528105197Ssam } 3529105197Ssam 3530105197Ssam p = mtod(m, struct sadb_sa *); 3531105197Ssam 3532105197Ssam bzero(p, len); 3533105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3534105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3535105197Ssam p->sadb_sa_spi = sav->spi; 3536105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3537105197Ssam p->sadb_sa_state = sav->state; 3538105197Ssam p->sadb_sa_auth = sav->alg_auth; 3539105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3540105197Ssam p->sadb_sa_flags = sav->flags; 3541105197Ssam 3542105197Ssam return m; 3543105197Ssam} 3544105197Ssam 3545105197Ssam/* 3546105197Ssam * set data into sadb_address. 3547105197Ssam */ 3548105197Ssamstatic struct mbuf * 3549189004Srdivackykey_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3550105197Ssam{ 3551105197Ssam struct mbuf *m; 3552105197Ssam struct sadb_address *p; 3553105197Ssam size_t len; 3554105197Ssam 3555105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3556105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3557105197Ssam m = key_alloc_mbuf(len); 3558105197Ssam if (!m || m->m_next) { /*XXX*/ 3559105197Ssam if (m) 3560105197Ssam m_freem(m); 3561105197Ssam return NULL; 3562105197Ssam } 3563105197Ssam 3564105197Ssam p = mtod(m, struct sadb_address *); 3565105197Ssam 3566105197Ssam bzero(p, len); 3567105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3568105197Ssam p->sadb_address_exttype = exttype; 3569105197Ssam p->sadb_address_proto = ul_proto; 3570105197Ssam if (prefixlen == FULLMASK) { 3571105197Ssam switch (saddr->sa_family) { 3572105197Ssam case AF_INET: 3573105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3574105197Ssam break; 3575105197Ssam case AF_INET6: 3576105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3577105197Ssam break; 3578105197Ssam default: 3579105197Ssam ; /*XXX*/ 3580105197Ssam } 3581105197Ssam } 3582105197Ssam p->sadb_address_prefixlen = prefixlen; 3583105197Ssam p->sadb_address_reserved = 0; 3584105197Ssam 3585105197Ssam bcopy(saddr, 3586105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3587105197Ssam saddr->sa_len); 3588105197Ssam 3589105197Ssam return m; 3590105197Ssam} 3591105197Ssam 3592105197Ssam/* 3593105197Ssam * set data into sadb_x_sa2. 3594105197Ssam */ 3595105197Ssamstatic struct mbuf * 3596189004Srdivackykey_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3597105197Ssam{ 3598105197Ssam struct mbuf *m; 3599105197Ssam struct sadb_x_sa2 *p; 3600105197Ssam size_t len; 3601105197Ssam 3602105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3603105197Ssam m = key_alloc_mbuf(len); 3604105197Ssam if (!m || m->m_next) { /*XXX*/ 3605105197Ssam if (m) 3606105197Ssam m_freem(m); 3607105197Ssam return NULL; 3608105197Ssam } 3609105197Ssam 3610105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3611105197Ssam 3612105197Ssam bzero(p, len); 3613105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3614105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3615105197Ssam p->sadb_x_sa2_mode = mode; 3616105197Ssam p->sadb_x_sa2_reserved1 = 0; 3617105197Ssam p->sadb_x_sa2_reserved2 = 0; 3618105197Ssam p->sadb_x_sa2_sequence = seq; 3619105197Ssam p->sadb_x_sa2_reqid = reqid; 3620105197Ssam 3621105197Ssam return m; 3622105197Ssam} 3623105197Ssam 3624105197Ssam/* 3625105197Ssam * set data into sadb_x_policy 3626105197Ssam */ 3627105197Ssamstatic struct mbuf * 3628189004Srdivackykey_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3629105197Ssam{ 3630105197Ssam struct mbuf *m; 3631105197Ssam struct sadb_x_policy *p; 3632105197Ssam size_t len; 3633105197Ssam 3634105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3635105197Ssam m = key_alloc_mbuf(len); 3636105197Ssam if (!m || m->m_next) { /*XXX*/ 3637105197Ssam if (m) 3638105197Ssam m_freem(m); 3639105197Ssam return NULL; 3640105197Ssam } 3641105197Ssam 3642105197Ssam p = mtod(m, struct sadb_x_policy *); 3643105197Ssam 3644105197Ssam bzero(p, len); 3645105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3646105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3647105197Ssam p->sadb_x_policy_type = type; 3648105197Ssam p->sadb_x_policy_dir = dir; 3649105197Ssam p->sadb_x_policy_id = id; 3650105197Ssam 3651105197Ssam return m; 3652105197Ssam} 3653105197Ssam 3654105197Ssam/* %%% utilities */ 3655157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3656157123Sgnn * of the kernel's key structures (seckey). 3657157123Sgnn * 3658157123Sgnn * IN: pointer to the src 3659157123Sgnn * OUT: NULL no more memory 3660105197Ssam */ 3661157123Sgnnstruct seckey * 3662157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3663157123Sgnn struct malloc_type *type) 3664105197Ssam{ 3665183550Szec INIT_VNET_IPSEC(curvnet); 3666157123Sgnn struct seckey *dst; 3667157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3668157123Sgnn if (dst != NULL) { 3669157123Sgnn dst->bits = src->sadb_key_bits; 3670157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3671157123Sgnn if (dst->key_data != NULL) { 3672157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3673157123Sgnn dst->key_data, len); 3674157123Sgnn } else { 3675157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3676157123Sgnn __func__)); 3677157123Sgnn free(dst, type); 3678157123Sgnn dst = NULL; 3679157123Sgnn } 3680157123Sgnn } else { 3681157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3682157123Sgnn __func__)); 3683105197Ssam 3684157123Sgnn } 3685157123Sgnn return dst; 3686157123Sgnn} 3687157123Sgnn 3688157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3689157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3690157123Sgnn * 3691157123Sgnn * IN: pointer to the destination, source and malloc type 3692157123Sgnn * OUT: NULL, no more memory 3693157123Sgnn */ 3694157123Sgnn 3695157123Sgnnstatic struct seclifetime * 3696157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3697157123Sgnn struct malloc_type *type) 3698157123Sgnn{ 3699183550Szec INIT_VNET_IPSEC(curvnet); 3700157123Sgnn struct seclifetime *dst = NULL; 3701157123Sgnn 3702157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3703157123Sgnn type, M_NOWAIT); 3704157123Sgnn if (dst == NULL) { 3705119643Ssam /* XXX counter */ 3706120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3707157123Sgnn } else { 3708157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3709157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3710157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3711157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3712157123Sgnn } 3713157123Sgnn return dst; 3714105197Ssam} 3715105197Ssam 3716105197Ssam/* compare my own address 3717105197Ssam * OUT: 1: true, i.e. my address. 3718105197Ssam * 0: false 3719105197Ssam */ 3720105197Ssamint 3721105197Ssamkey_ismyaddr(sa) 3722105197Ssam struct sockaddr *sa; 3723105197Ssam{ 3724105197Ssam#ifdef INET 3725183550Szec INIT_VNET_INET(curvnet); 3726105197Ssam struct sockaddr_in *sin; 3727105197Ssam struct in_ifaddr *ia; 3728105197Ssam#endif 3729105197Ssam 3730120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3731105197Ssam 3732105197Ssam switch (sa->sa_family) { 3733105197Ssam#ifdef INET 3734105197Ssam case AF_INET: 3735105197Ssam sin = (struct sockaddr_in *)sa; 3736181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3737105197Ssam ia = ia->ia_link.tqe_next) 3738105197Ssam { 3739105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3740105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3741105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3742105197Ssam { 3743105197Ssam return 1; 3744105197Ssam } 3745105197Ssam } 3746105197Ssam break; 3747105197Ssam#endif 3748105197Ssam#ifdef INET6 3749105197Ssam case AF_INET6: 3750105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3751105197Ssam#endif 3752105197Ssam } 3753105197Ssam 3754105197Ssam return 0; 3755105197Ssam} 3756105197Ssam 3757105197Ssam#ifdef INET6 3758105197Ssam/* 3759105197Ssam * compare my own address for IPv6. 3760105197Ssam * 1: ours 3761105197Ssam * 0: other 3762105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3763105197Ssam */ 3764105197Ssam#include <netinet6/in6_var.h> 3765105197Ssam 3766105197Ssamstatic int 3767105197Ssamkey_ismyaddr6(sin6) 3768105197Ssam struct sockaddr_in6 *sin6; 3769105197Ssam{ 3770183550Szec INIT_VNET_INET6(curvnet); 3771105197Ssam struct in6_ifaddr *ia; 3772191663Sbms#if 0 3773105197Ssam struct in6_multi *in6m; 3774191663Sbms#endif 3775105197Ssam 3776181803Sbz for (ia = V_in6_ifaddr; ia; ia = ia->ia_next) { 3777105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3778105197Ssam (struct sockaddr *)&ia->ia_addr, 0) == 0) 3779105197Ssam return 1; 3780105197Ssam 3781191663Sbms#if 0 3782105197Ssam /* 3783105197Ssam * XXX Multicast 3784105197Ssam * XXX why do we care about multlicast here while we don't care 3785105197Ssam * about IPv4 multicast?? 3786105197Ssam * XXX scope 3787105197Ssam */ 3788105197Ssam in6m = NULL; 3789105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3790105197Ssam if (in6m) 3791105197Ssam return 1; 3792191663Sbms#endif 3793105197Ssam } 3794105197Ssam 3795105197Ssam /* loopback, just for safety */ 3796105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3797105197Ssam return 1; 3798105197Ssam 3799105197Ssam return 0; 3800105197Ssam} 3801105197Ssam#endif /*INET6*/ 3802105197Ssam 3803105197Ssam/* 3804105197Ssam * compare two secasindex structure. 3805105197Ssam * flag can specify to compare 2 saidxes. 3806105197Ssam * compare two secasindex structure without both mode and reqid. 3807105197Ssam * don't compare port. 3808105197Ssam * IN: 3809105197Ssam * saidx0: source, it can be in SAD. 3810105197Ssam * saidx1: object. 3811105197Ssam * OUT: 3812105197Ssam * 1 : equal 3813105197Ssam * 0 : not equal 3814105197Ssam */ 3815105197Ssamstatic int 3816105197Ssamkey_cmpsaidx( 3817105197Ssam const struct secasindex *saidx0, 3818105197Ssam const struct secasindex *saidx1, 3819105197Ssam int flag) 3820105197Ssam{ 3821105197Ssam /* sanity */ 3822105197Ssam if (saidx0 == NULL && saidx1 == NULL) 3823105197Ssam return 1; 3824105197Ssam 3825105197Ssam if (saidx0 == NULL || saidx1 == NULL) 3826105197Ssam return 0; 3827105197Ssam 3828105197Ssam if (saidx0->proto != saidx1->proto) 3829105197Ssam return 0; 3830105197Ssam 3831105197Ssam if (flag == CMP_EXACTLY) { 3832105197Ssam if (saidx0->mode != saidx1->mode) 3833105197Ssam return 0; 3834105197Ssam if (saidx0->reqid != saidx1->reqid) 3835105197Ssam return 0; 3836105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3837105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3838105197Ssam return 0; 3839105197Ssam } else { 3840105197Ssam 3841105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3842105197Ssam if (flag == CMP_MODE_REQID 3843105197Ssam ||flag == CMP_REQID) { 3844105197Ssam /* 3845105197Ssam * If reqid of SPD is non-zero, unique SA is required. 3846105197Ssam * The result must be of same reqid in this case. 3847105197Ssam */ 3848105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3849105197Ssam return 0; 3850105197Ssam } 3851105197Ssam 3852105197Ssam if (flag == CMP_MODE_REQID) { 3853105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 3854105197Ssam && saidx0->mode != saidx1->mode) 3855105197Ssam return 0; 3856105197Ssam } 3857105197Ssam 3858105197Ssam if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3859105197Ssam return 0; 3860105197Ssam } 3861105197Ssam if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 3862105197Ssam return 0; 3863105197Ssam } 3864105197Ssam } 3865105197Ssam 3866105197Ssam return 1; 3867105197Ssam} 3868105197Ssam 3869105197Ssam/* 3870105197Ssam * compare two secindex structure exactly. 3871105197Ssam * IN: 3872105197Ssam * spidx0: source, it is often in SPD. 3873105197Ssam * spidx1: object, it is often from PFKEY message. 3874105197Ssam * OUT: 3875105197Ssam * 1 : equal 3876105197Ssam * 0 : not equal 3877105197Ssam */ 3878105197Ssamstatic int 3879105197Ssamkey_cmpspidx_exactly( 3880105197Ssam struct secpolicyindex *spidx0, 3881105197Ssam struct secpolicyindex *spidx1) 3882105197Ssam{ 3883105197Ssam /* sanity */ 3884105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3885105197Ssam return 1; 3886105197Ssam 3887105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3888105197Ssam return 0; 3889105197Ssam 3890105197Ssam if (spidx0->prefs != spidx1->prefs 3891105197Ssam || spidx0->prefd != spidx1->prefd 3892105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 3893105197Ssam return 0; 3894105197Ssam 3895105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 3896105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 3897105197Ssam} 3898105197Ssam 3899105197Ssam/* 3900105197Ssam * compare two secindex structure with mask. 3901105197Ssam * IN: 3902105197Ssam * spidx0: source, it is often in SPD. 3903105197Ssam * spidx1: object, it is often from IP header. 3904105197Ssam * OUT: 3905105197Ssam * 1 : equal 3906105197Ssam * 0 : not equal 3907105197Ssam */ 3908105197Ssamstatic int 3909105197Ssamkey_cmpspidx_withmask( 3910105197Ssam struct secpolicyindex *spidx0, 3911105197Ssam struct secpolicyindex *spidx1) 3912105197Ssam{ 3913105197Ssam /* sanity */ 3914105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3915105197Ssam return 1; 3916105197Ssam 3917105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3918105197Ssam return 0; 3919105197Ssam 3920105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 3921105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 3922105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 3923105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 3924105197Ssam return 0; 3925105197Ssam 3926105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 3927105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 3928105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 3929105197Ssam return 0; 3930105197Ssam 3931105197Ssam switch (spidx0->src.sa.sa_family) { 3932105197Ssam case AF_INET: 3933105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 3934105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 3935105197Ssam return 0; 3936105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 3937105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 3938105197Ssam return 0; 3939105197Ssam break; 3940105197Ssam case AF_INET6: 3941105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 3942105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 3943105197Ssam return 0; 3944105197Ssam /* 3945105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3946105197Ssam * as a wildcard scope, which matches any scope zone ID. 3947105197Ssam */ 3948105197Ssam if (spidx0->src.sin6.sin6_scope_id && 3949105197Ssam spidx1->src.sin6.sin6_scope_id && 3950105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 3951105197Ssam return 0; 3952105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 3953105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 3954105197Ssam return 0; 3955105197Ssam break; 3956105197Ssam default: 3957105197Ssam /* XXX */ 3958105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 3959105197Ssam return 0; 3960105197Ssam break; 3961105197Ssam } 3962105197Ssam 3963105197Ssam switch (spidx0->dst.sa.sa_family) { 3964105197Ssam case AF_INET: 3965105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 3966105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 3967105197Ssam return 0; 3968105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 3969105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 3970105197Ssam return 0; 3971105197Ssam break; 3972105197Ssam case AF_INET6: 3973105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 3974105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 3975105197Ssam return 0; 3976105197Ssam /* 3977105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3978105197Ssam * as a wildcard scope, which matches any scope zone ID. 3979105197Ssam */ 3980130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 3981130928Sbms spidx1->dst.sin6.sin6_scope_id && 3982105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 3983105197Ssam return 0; 3984105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 3985105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 3986105197Ssam return 0; 3987105197Ssam break; 3988105197Ssam default: 3989105197Ssam /* XXX */ 3990105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 3991105197Ssam return 0; 3992105197Ssam break; 3993105197Ssam } 3994105197Ssam 3995105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 3996105197Ssam 3997105197Ssam return 1; 3998105197Ssam} 3999105197Ssam 4000105197Ssam/* returns 0 on match */ 4001105197Ssamstatic int 4002105197Ssamkey_sockaddrcmp( 4003105197Ssam const struct sockaddr *sa1, 4004105197Ssam const struct sockaddr *sa2, 4005105197Ssam int port) 4006105197Ssam{ 4007105197Ssam#ifdef satosin 4008105197Ssam#undef satosin 4009105197Ssam#endif 4010105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4011105197Ssam#ifdef satosin6 4012105197Ssam#undef satosin6 4013105197Ssam#endif 4014105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4015105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4016105197Ssam return 1; 4017105197Ssam 4018105197Ssam switch (sa1->sa_family) { 4019105197Ssam case AF_INET: 4020105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4021105197Ssam return 1; 4022105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4023105197Ssam satosin(sa2)->sin_addr.s_addr) { 4024105197Ssam return 1; 4025105197Ssam } 4026105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4027105197Ssam return 1; 4028105197Ssam break; 4029105197Ssam case AF_INET6: 4030105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4031105197Ssam return 1; /*EINVAL*/ 4032105197Ssam if (satosin6(sa1)->sin6_scope_id != 4033105197Ssam satosin6(sa2)->sin6_scope_id) { 4034105197Ssam return 1; 4035105197Ssam } 4036105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4037105197Ssam &satosin6(sa2)->sin6_addr)) { 4038105197Ssam return 1; 4039105197Ssam } 4040105197Ssam if (port && 4041105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4042105197Ssam return 1; 4043105197Ssam } 4044170120Sbz break; 4045105197Ssam default: 4046105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4047105197Ssam return 1; 4048105197Ssam break; 4049105197Ssam } 4050105197Ssam 4051105197Ssam return 0; 4052105197Ssam#undef satosin 4053105197Ssam#undef satosin6 4054105197Ssam} 4055105197Ssam 4056105197Ssam/* 4057105197Ssam * compare two buffers with mask. 4058105197Ssam * IN: 4059105197Ssam * addr1: source 4060105197Ssam * addr2: object 4061105197Ssam * bits: Number of bits to compare 4062105197Ssam * OUT: 4063105197Ssam * 1 : equal 4064105197Ssam * 0 : not equal 4065105197Ssam */ 4066105197Ssamstatic int 4067105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4068105197Ssam{ 4069105197Ssam const unsigned char *p1 = a1; 4070105197Ssam const unsigned char *p2 = a2; 4071105197Ssam 4072105197Ssam /* XXX: This could be considerably faster if we compare a word 4073105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4074105197Ssam 4075105197Ssam /* Handle null pointers */ 4076105197Ssam if (p1 == NULL || p2 == NULL) 4077105197Ssam return (p1 == p2); 4078105197Ssam 4079105197Ssam while (bits >= 8) { 4080105197Ssam if (*p1++ != *p2++) 4081105197Ssam return 0; 4082105197Ssam bits -= 8; 4083105197Ssam } 4084105197Ssam 4085105197Ssam if (bits > 0) { 4086105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4087105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4088105197Ssam return 0; 4089105197Ssam } 4090105197Ssam return 1; /* Match! */ 4091105197Ssam} 4092105197Ssam 4093119643Ssamstatic void 4094119643Ssamkey_flush_spd(time_t now) 4095105197Ssam{ 4096183550Szec INIT_VNET_IPSEC(curvnet); 4097120585Ssam static u_int16_t sptree_scangen = 0; 4098120585Ssam u_int16_t gen = sptree_scangen++; 4099120585Ssam struct secpolicy *sp; 4100105197Ssam u_int dir; 4101105197Ssam 4102105197Ssam /* SPD */ 4103105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4104120585Ssamrestart: 4105120585Ssam SPTREE_LOCK(); 4106181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4107120585Ssam if (sp->scangen == gen) /* previously handled */ 4108120585Ssam continue; 4109120585Ssam sp->scangen = gen; 4110192880Svanhu if (sp->state == IPSEC_SPSTATE_DEAD && 4111192880Svanhu sp->refcnt == 1) { 4112192880Svanhu /* 4113192880Svanhu * Ensure that we only decrease refcnt once, 4114192880Svanhu * when we're the last consumer. 4115192880Svanhu * Directly call SP_DELREF/key_delsp instead 4116192880Svanhu * of KEY_FREESP to avoid unlocking/relocking 4117192880Svanhu * SPTREE_LOCK before key_delsp: may refcnt 4118192880Svanhu * be increased again during that time ? 4119192880Svanhu * NB: also clean entries created by 4120192880Svanhu * key_spdflush 4121192880Svanhu */ 4122192880Svanhu SP_DELREF(sp); 4123192880Svanhu key_delsp(sp); 4124120585Ssam SPTREE_UNLOCK(); 4125120585Ssam goto restart; 4126105197Ssam } 4127105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4128105197Ssam continue; 4129105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4130105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4131105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4132120585Ssam SPTREE_UNLOCK(); 4133105197Ssam key_spdexpire(sp); 4134120585Ssam goto restart; 4135105197Ssam } 4136105197Ssam } 4137120585Ssam SPTREE_UNLOCK(); 4138105197Ssam } 4139119643Ssam} 4140105197Ssam 4141119643Ssamstatic void 4142119643Ssamkey_flush_sad(time_t now) 4143119643Ssam{ 4144183550Szec INIT_VNET_IPSEC(curvnet); 4145105197Ssam struct secashead *sah, *nextsah; 4146105197Ssam struct secasvar *sav, *nextsav; 4147105197Ssam 4148119643Ssam /* SAD */ 4149120585Ssam SAHTREE_LOCK(); 4150181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4151105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4152105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4153105197Ssam key_delsah(sah); 4154105197Ssam continue; 4155105197Ssam } 4156105197Ssam 4157105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4158120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4159190071Svanhu /* Need to also check refcnt for a larval SA ??? */ 4160181803Sbz if (now - sav->created > V_key_larval_lifetime) 4161105197Ssam KEY_FREESAV(&sav); 4162105197Ssam } 4163105197Ssam 4164105197Ssam /* 4165105197Ssam * check MATURE entry to start to send expire message 4166105197Ssam * whether or not. 4167105197Ssam */ 4168120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4169105197Ssam /* we don't need to check. */ 4170105197Ssam if (sav->lft_s == NULL) 4171105197Ssam continue; 4172105197Ssam 4173105197Ssam /* sanity check */ 4174105197Ssam if (sav->lft_c == NULL) { 4175120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4176120585Ssam "time, why?\n", __func__)); 4177105197Ssam continue; 4178105197Ssam } 4179105197Ssam 4180105197Ssam /* check SOFT lifetime */ 4181157123Sgnn if (sav->lft_s->addtime != 0 && 4182157123Sgnn now - sav->created > sav->lft_s->addtime) { 4183189406Svanhu key_sa_chgstate(sav, SADB_SASTATE_DYING); 4184190075Svanhu /* 4185190323Svanhu * Actually, only send expire message if 4186190323Svanhu * SA has been used, as it was done before, 4187190323Svanhu * but should we always send such message, 4188190323Svanhu * and let IKE daemon decide if it should be 4189190323Svanhu * renegotiated or not ? 4190190323Svanhu * XXX expire message will actually NOT be 4191190323Svanhu * sent if SA is only used after soft 4192190323Svanhu * lifetime has been reached, see below 4193190323Svanhu * (DYING state) 4194105197Ssam */ 4195189406Svanhu if (sav->lft_c->usetime != 0) 4196105197Ssam key_expire(sav); 4197105197Ssam } 4198105197Ssam /* check SOFT lifetime by bytes */ 4199105197Ssam /* 4200105197Ssam * XXX I don't know the way to delete this SA 4201105197Ssam * when new SA is installed. Caution when it's 4202105197Ssam * installed too big lifetime by time. 4203105197Ssam */ 4204157123Sgnn else if (sav->lft_s->bytes != 0 && 4205157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4206105197Ssam 4207105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4208105197Ssam /* 4209105197Ssam * XXX If we keep to send expire 4210105197Ssam * message in the status of 4211105197Ssam * DYING. Do remove below code. 4212105197Ssam */ 4213105197Ssam key_expire(sav); 4214105197Ssam } 4215105197Ssam } 4216105197Ssam 4217105197Ssam /* check DYING entry to change status to DEAD. */ 4218120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4219105197Ssam /* we don't need to check. */ 4220105197Ssam if (sav->lft_h == NULL) 4221105197Ssam continue; 4222105197Ssam 4223105197Ssam /* sanity check */ 4224105197Ssam if (sav->lft_c == NULL) { 4225120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4226120585Ssam "time, why?\n", __func__)); 4227105197Ssam continue; 4228105197Ssam } 4229105197Ssam 4230157123Sgnn if (sav->lft_h->addtime != 0 && 4231157123Sgnn now - sav->created > sav->lft_h->addtime) { 4232105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4233105197Ssam KEY_FREESAV(&sav); 4234105197Ssam } 4235105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4236105197Ssam else if (sav->lft_s != NULL 4237157123Sgnn && sav->lft_s->addtime != 0 4238157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4239105197Ssam /* 4240105197Ssam * XXX: should be checked to be 4241105197Ssam * installed the valid SA. 4242105197Ssam */ 4243105197Ssam 4244105197Ssam /* 4245105197Ssam * If there is no SA then sending 4246105197Ssam * expire message. 4247105197Ssam */ 4248105197Ssam key_expire(sav); 4249105197Ssam } 4250105197Ssam#endif 4251105197Ssam /* check HARD lifetime by bytes */ 4252157123Sgnn else if (sav->lft_h->bytes != 0 && 4253157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4254105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4255105197Ssam KEY_FREESAV(&sav); 4256105197Ssam } 4257105197Ssam } 4258105197Ssam 4259105197Ssam /* delete entry in DEAD */ 4260120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4261105197Ssam /* sanity check */ 4262105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4263120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4264120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4265120585Ssam __func__, 4266105197Ssam SADB_SASTATE_DEAD, sav->state)); 4267105197Ssam } 4268105197Ssam /* 4269105197Ssam * do not call key_freesav() here. 4270105197Ssam * sav should already be freed, and sav->refcnt 4271105197Ssam * shows other references to sav 4272105197Ssam * (such as from SPD). 4273105197Ssam */ 4274105197Ssam } 4275105197Ssam } 4276120585Ssam SAHTREE_UNLOCK(); 4277119643Ssam} 4278105197Ssam 4279119643Ssamstatic void 4280119643Ssamkey_flush_acq(time_t now) 4281119643Ssam{ 4282183550Szec INIT_VNET_IPSEC(curvnet); 4283105197Ssam struct secacq *acq, *nextacq; 4284105197Ssam 4285119643Ssam /* ACQ tree */ 4286120585Ssam ACQ_LOCK(); 4287181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4288105197Ssam nextacq = LIST_NEXT(acq, chain); 4289181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4290105197Ssam && __LIST_CHAINED(acq)) { 4291105197Ssam LIST_REMOVE(acq, chain); 4292119643Ssam free(acq, M_IPSEC_SAQ); 4293105197Ssam } 4294105197Ssam } 4295120585Ssam ACQ_UNLOCK(); 4296119643Ssam} 4297105197Ssam 4298119643Ssamstatic void 4299119643Ssamkey_flush_spacq(time_t now) 4300119643Ssam{ 4301183550Szec INIT_VNET_IPSEC(curvnet); 4302105197Ssam struct secspacq *acq, *nextacq; 4303105197Ssam 4304119643Ssam /* SP ACQ tree */ 4305120585Ssam SPACQ_LOCK(); 4306181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4307105197Ssam nextacq = LIST_NEXT(acq, chain); 4308181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4309105197Ssam && __LIST_CHAINED(acq)) { 4310105197Ssam LIST_REMOVE(acq, chain); 4311119643Ssam free(acq, M_IPSEC_SAQ); 4312105197Ssam } 4313105197Ssam } 4314120585Ssam SPACQ_UNLOCK(); 4315119643Ssam} 4316105197Ssam 4317119643Ssam/* 4318119643Ssam * time handler. 4319119643Ssam * scanning SPD and SAD to check status for each entries, 4320119643Ssam * and do to remove or to expire. 4321119643Ssam * XXX: year 2038 problem may remain. 4322119643Ssam */ 4323119643Ssamvoid 4324119643Ssamkey_timehandler(void) 4325119643Ssam{ 4326183550Szec VNET_ITERATOR_DECL(vnet_iter); 4327119643Ssam time_t now = time_second; 4328105197Ssam 4329185348Szec VNET_LIST_RLOCK(); 4330183550Szec VNET_FOREACH(vnet_iter) { 4331183550Szec CURVNET_SET(vnet_iter); 4332183550Szec key_flush_spd(now); 4333183550Szec key_flush_sad(now); 4334183550Szec key_flush_acq(now); 4335183550Szec key_flush_spacq(now); 4336183550Szec CURVNET_RESTORE(); 4337183550Szec } 4338185348Szec VNET_LIST_RUNLOCK(); 4339119643Ssam 4340105197Ssam#ifndef IPSEC_DEBUG2 4341105197Ssam /* do exchange to tick time !! */ 4342105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4343105197Ssam#endif /* IPSEC_DEBUG2 */ 4344105197Ssam} 4345105197Ssam 4346105197Ssamu_long 4347105197Ssamkey_random() 4348105197Ssam{ 4349105197Ssam u_long value; 4350105197Ssam 4351105197Ssam key_randomfill(&value, sizeof(value)); 4352105197Ssam return value; 4353105197Ssam} 4354105197Ssam 4355105197Ssamvoid 4356105197Ssamkey_randomfill(p, l) 4357105197Ssam void *p; 4358105197Ssam size_t l; 4359105197Ssam{ 4360105197Ssam size_t n; 4361105197Ssam u_long v; 4362105197Ssam static int warn = 1; 4363105197Ssam 4364105197Ssam n = 0; 4365105197Ssam n = (size_t)read_random(p, (u_int)l); 4366105197Ssam /* last resort */ 4367105197Ssam while (n < l) { 4368105197Ssam v = random(); 4369105197Ssam bcopy(&v, (u_int8_t *)p + n, 4370105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4371105197Ssam n += sizeof(v); 4372105197Ssam 4373105197Ssam if (warn) { 4374105197Ssam printf("WARNING: pseudo-random number generator " 4375105197Ssam "used for IPsec processing\n"); 4376105197Ssam warn = 0; 4377105197Ssam } 4378105197Ssam } 4379105197Ssam} 4380105197Ssam 4381105197Ssam/* 4382105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4383105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4384105197Ssam * OUT: 4385105197Ssam * 0: invalid satype. 4386105197Ssam */ 4387105197Ssamstatic u_int16_t 4388189004Srdivackykey_satype2proto(u_int8_t satype) 4389105197Ssam{ 4390105197Ssam switch (satype) { 4391105197Ssam case SADB_SATYPE_UNSPEC: 4392105197Ssam return IPSEC_PROTO_ANY; 4393105197Ssam case SADB_SATYPE_AH: 4394105197Ssam return IPPROTO_AH; 4395105197Ssam case SADB_SATYPE_ESP: 4396105197Ssam return IPPROTO_ESP; 4397105197Ssam case SADB_X_SATYPE_IPCOMP: 4398105197Ssam return IPPROTO_IPCOMP; 4399125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4400125680Sbms return IPPROTO_TCP; 4401105197Ssam default: 4402105197Ssam return 0; 4403105197Ssam } 4404105197Ssam /* NOTREACHED */ 4405105197Ssam} 4406105197Ssam 4407105197Ssam/* 4408105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4409105197Ssam * OUT: 4410105197Ssam * 0: invalid protocol type. 4411105197Ssam */ 4412105197Ssamstatic u_int8_t 4413189004Srdivackykey_proto2satype(u_int16_t proto) 4414105197Ssam{ 4415105197Ssam switch (proto) { 4416105197Ssam case IPPROTO_AH: 4417105197Ssam return SADB_SATYPE_AH; 4418105197Ssam case IPPROTO_ESP: 4419105197Ssam return SADB_SATYPE_ESP; 4420105197Ssam case IPPROTO_IPCOMP: 4421105197Ssam return SADB_X_SATYPE_IPCOMP; 4422125680Sbms case IPPROTO_TCP: 4423125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4424105197Ssam default: 4425105197Ssam return 0; 4426105197Ssam } 4427105197Ssam /* NOTREACHED */ 4428105197Ssam} 4429105197Ssam 4430105197Ssam/* %%% PF_KEY */ 4431105197Ssam/* 4432105197Ssam * SADB_GETSPI processing is to receive 4433105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4434105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4435105197Ssam * tree with the status of LARVAL, and send 4436105197Ssam * <base, SA(*), address(SD)> 4437105197Ssam * to the IKMPd. 4438105197Ssam * 4439105197Ssam * IN: mhp: pointer to the pointer to each header. 4440105197Ssam * OUT: NULL if fail. 4441105197Ssam * other if success, return pointer to the message to send. 4442105197Ssam */ 4443105197Ssamstatic int 4444105197Ssamkey_getspi(so, m, mhp) 4445105197Ssam struct socket *so; 4446105197Ssam struct mbuf *m; 4447105197Ssam const struct sadb_msghdr *mhp; 4448105197Ssam{ 4449183550Szec INIT_VNET_IPSEC(curvnet); 4450105197Ssam struct sadb_address *src0, *dst0; 4451105197Ssam struct secasindex saidx; 4452105197Ssam struct secashead *newsah; 4453105197Ssam struct secasvar *newsav; 4454105197Ssam u_int8_t proto; 4455105197Ssam u_int32_t spi; 4456105197Ssam u_int8_t mode; 4457105197Ssam u_int32_t reqid; 4458105197Ssam int error; 4459105197Ssam 4460120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4461120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4462120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4463120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4464105197Ssam 4465105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4466105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4467120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4468120585Ssam __func__)); 4469105197Ssam return key_senderror(so, m, EINVAL); 4470105197Ssam } 4471105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4472105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4473120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4474120585Ssam __func__)); 4475105197Ssam return key_senderror(so, m, EINVAL); 4476105197Ssam } 4477105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4478105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4479105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4480105197Ssam } else { 4481105197Ssam mode = IPSEC_MODE_ANY; 4482105197Ssam reqid = 0; 4483105197Ssam } 4484105197Ssam 4485105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4486105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4487105197Ssam 4488105197Ssam /* map satype to proto */ 4489105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4490120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4491120585Ssam __func__)); 4492105197Ssam return key_senderror(so, m, EINVAL); 4493105197Ssam } 4494105197Ssam 4495105197Ssam /* make sure if port number is zero. */ 4496105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4497105197Ssam case AF_INET: 4498105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4499105197Ssam sizeof(struct sockaddr_in)) 4500105197Ssam return key_senderror(so, m, EINVAL); 4501105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4502105197Ssam break; 4503105197Ssam case AF_INET6: 4504105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4505105197Ssam sizeof(struct sockaddr_in6)) 4506105197Ssam return key_senderror(so, m, EINVAL); 4507105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4508105197Ssam break; 4509105197Ssam default: 4510105197Ssam ; /*???*/ 4511105197Ssam } 4512105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4513105197Ssam case AF_INET: 4514105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4515105197Ssam sizeof(struct sockaddr_in)) 4516105197Ssam return key_senderror(so, m, EINVAL); 4517105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4518105197Ssam break; 4519105197Ssam case AF_INET6: 4520105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4521105197Ssam sizeof(struct sockaddr_in6)) 4522105197Ssam return key_senderror(so, m, EINVAL); 4523105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4524105197Ssam break; 4525105197Ssam default: 4526105197Ssam ; /*???*/ 4527105197Ssam } 4528105197Ssam 4529105197Ssam /* XXX boundary check against sa_len */ 4530105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4531105197Ssam 4532105197Ssam /* SPI allocation */ 4533105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4534105197Ssam &saidx); 4535105197Ssam if (spi == 0) 4536105197Ssam return key_senderror(so, m, EINVAL); 4537105197Ssam 4538105197Ssam /* get a SA index */ 4539105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4540105197Ssam /* create a new SA index */ 4541105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4542120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4543105197Ssam return key_senderror(so, m, ENOBUFS); 4544105197Ssam } 4545105197Ssam } 4546105197Ssam 4547105197Ssam /* get a new SA */ 4548105197Ssam /* XXX rewrite */ 4549105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4550105197Ssam if (newsav == NULL) { 4551105197Ssam /* XXX don't free new SA index allocated in above. */ 4552105197Ssam return key_senderror(so, m, error); 4553105197Ssam } 4554105197Ssam 4555105197Ssam /* set spi */ 4556105197Ssam newsav->spi = htonl(spi); 4557105197Ssam 4558105197Ssam /* delete the entry in acqtree */ 4559105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4560105197Ssam struct secacq *acq; 4561105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4562105197Ssam /* reset counter in order to deletion by timehandler. */ 4563105197Ssam acq->created = time_second; 4564105197Ssam acq->count = 0; 4565105197Ssam } 4566105197Ssam } 4567105197Ssam 4568105197Ssam { 4569105197Ssam struct mbuf *n, *nn; 4570105197Ssam struct sadb_sa *m_sa; 4571105197Ssam struct sadb_msg *newmsg; 4572105197Ssam int off, len; 4573105197Ssam 4574105197Ssam /* create new sadb_msg to reply. */ 4575105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4576105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4577105197Ssam 4578111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4579105197Ssam if (len > MHLEN) { 4580111119Simp MCLGET(n, M_DONTWAIT); 4581105197Ssam if ((n->m_flags & M_EXT) == 0) { 4582105197Ssam m_freem(n); 4583105197Ssam n = NULL; 4584105197Ssam } 4585105197Ssam } 4586105197Ssam if (!n) 4587105197Ssam return key_senderror(so, m, ENOBUFS); 4588105197Ssam 4589105197Ssam n->m_len = len; 4590105197Ssam n->m_next = NULL; 4591105197Ssam off = 0; 4592105197Ssam 4593105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4594105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4595105197Ssam 4596105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4597105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4598105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4599105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4600105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4601105197Ssam 4602120585Ssam IPSEC_ASSERT(off == len, 4603120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4604105197Ssam 4605105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4606105197Ssam SADB_EXT_ADDRESS_DST); 4607105197Ssam if (!n->m_next) { 4608105197Ssam m_freem(n); 4609105197Ssam return key_senderror(so, m, ENOBUFS); 4610105197Ssam } 4611105197Ssam 4612105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4613105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4614105197Ssam if (n == NULL) 4615105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4616105197Ssam } 4617105197Ssam 4618105197Ssam n->m_pkthdr.len = 0; 4619105197Ssam for (nn = n; nn; nn = nn->m_next) 4620105197Ssam n->m_pkthdr.len += nn->m_len; 4621105197Ssam 4622105197Ssam newmsg = mtod(n, struct sadb_msg *); 4623105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4624105197Ssam newmsg->sadb_msg_errno = 0; 4625105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4626105197Ssam 4627105197Ssam m_freem(m); 4628105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4629105197Ssam } 4630105197Ssam} 4631105197Ssam 4632105197Ssam/* 4633105197Ssam * allocating new SPI 4634105197Ssam * called by key_getspi(). 4635105197Ssam * OUT: 4636105197Ssam * 0: failure. 4637105197Ssam * others: success. 4638105197Ssam */ 4639105197Ssamstatic u_int32_t 4640105197Ssamkey_do_getnewspi(spirange, saidx) 4641105197Ssam struct sadb_spirange *spirange; 4642105197Ssam struct secasindex *saidx; 4643105197Ssam{ 4644183550Szec INIT_VNET_IPSEC(curvnet); 4645105197Ssam u_int32_t newspi; 4646105197Ssam u_int32_t min, max; 4647181803Sbz int count = V_key_spi_trycnt; 4648105197Ssam 4649105197Ssam /* set spi range to allocate */ 4650105197Ssam if (spirange != NULL) { 4651105197Ssam min = spirange->sadb_spirange_min; 4652105197Ssam max = spirange->sadb_spirange_max; 4653105197Ssam } else { 4654181803Sbz min = V_key_spi_minval; 4655181803Sbz max = V_key_spi_maxval; 4656105197Ssam } 4657105197Ssam /* IPCOMP needs 2-byte SPI */ 4658105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4659105197Ssam u_int32_t t; 4660105197Ssam if (min >= 0x10000) 4661105197Ssam min = 0xffff; 4662105197Ssam if (max >= 0x10000) 4663105197Ssam max = 0xffff; 4664105197Ssam if (min > max) { 4665105197Ssam t = min; min = max; max = t; 4666105197Ssam } 4667105197Ssam } 4668105197Ssam 4669105197Ssam if (min == max) { 4670105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4671120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4672120585Ssam __func__, min)); 4673105197Ssam return 0; 4674105197Ssam } 4675105197Ssam 4676105197Ssam count--; /* taking one cost. */ 4677105197Ssam newspi = min; 4678105197Ssam 4679105197Ssam } else { 4680105197Ssam 4681105197Ssam /* init SPI */ 4682105197Ssam newspi = 0; 4683105197Ssam 4684105197Ssam /* when requesting to allocate spi ranged */ 4685105197Ssam while (count--) { 4686105197Ssam /* generate pseudo-random SPI value ranged. */ 4687105197Ssam newspi = min + (key_random() % (max - min + 1)); 4688105197Ssam 4689105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4690105197Ssam break; 4691105197Ssam } 4692105197Ssam 4693105197Ssam if (count == 0 || newspi == 0) { 4694120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4695120585Ssam __func__)); 4696105197Ssam return 0; 4697105197Ssam } 4698105197Ssam } 4699105197Ssam 4700105197Ssam /* statistics */ 4701105197Ssam keystat.getspi_count = 4702181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4703105197Ssam 4704105197Ssam return newspi; 4705105197Ssam} 4706105197Ssam 4707105197Ssam/* 4708105197Ssam * SADB_UPDATE processing 4709105197Ssam * receive 4710105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4711105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4712105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4713105197Ssam * and send 4714105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4715105197Ssam * (identity(SD),) (sensitivity)> 4716105197Ssam * to the ikmpd. 4717105197Ssam * 4718105197Ssam * m will always be freed. 4719105197Ssam */ 4720105197Ssamstatic int 4721105197Ssamkey_update(so, m, mhp) 4722105197Ssam struct socket *so; 4723105197Ssam struct mbuf *m; 4724105197Ssam const struct sadb_msghdr *mhp; 4725105197Ssam{ 4726183550Szec INIT_VNET_IPSEC(curvnet); 4727105197Ssam struct sadb_sa *sa0; 4728105197Ssam struct sadb_address *src0, *dst0; 4729105197Ssam struct secasindex saidx; 4730105197Ssam struct secashead *sah; 4731105197Ssam struct secasvar *sav; 4732105197Ssam u_int16_t proto; 4733105197Ssam u_int8_t mode; 4734105197Ssam u_int32_t reqid; 4735105197Ssam int error; 4736105197Ssam 4737120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4738120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4739120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4740120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4741105197Ssam 4742105197Ssam /* map satype to proto */ 4743105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4744120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4745120585Ssam __func__)); 4746105197Ssam return key_senderror(so, m, EINVAL); 4747105197Ssam } 4748105197Ssam 4749105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4750105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4751105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4752105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4753105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4754105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4755105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4756105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4757105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4758105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4759105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4760120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4761120585Ssam __func__)); 4762105197Ssam return key_senderror(so, m, EINVAL); 4763105197Ssam } 4764105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4765105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4766105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4767120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4768120585Ssam __func__)); 4769105197Ssam return key_senderror(so, m, EINVAL); 4770105197Ssam } 4771105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4772105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4773105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4774105197Ssam } else { 4775105197Ssam mode = IPSEC_MODE_ANY; 4776105197Ssam reqid = 0; 4777105197Ssam } 4778105197Ssam /* XXX boundary checking for other extensions */ 4779105197Ssam 4780105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4781105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4782105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4783105197Ssam 4784105197Ssam /* XXX boundary check against sa_len */ 4785105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4786105197Ssam 4787105197Ssam /* get a SA header */ 4788105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 4789120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 4790105197Ssam return key_senderror(so, m, ENOENT); 4791105197Ssam } 4792105197Ssam 4793105197Ssam /* set spidx if there */ 4794105197Ssam /* XXX rewrite */ 4795105197Ssam error = key_setident(sah, m, mhp); 4796105197Ssam if (error) 4797105197Ssam return key_senderror(so, m, error); 4798105197Ssam 4799105197Ssam /* find a SA with sequence number. */ 4800105197Ssam#ifdef IPSEC_DOSEQCHECK 4801105197Ssam if (mhp->msg->sadb_msg_seq != 0 4802105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4803120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 4804120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 4805105197Ssam return key_senderror(so, m, ENOENT); 4806105197Ssam } 4807105197Ssam#else 4808120585Ssam SAHTREE_LOCK(); 4809120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 4810120585Ssam SAHTREE_UNLOCK(); 4811120585Ssam if (sav == NULL) { 4812120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 4813120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4814105197Ssam return key_senderror(so, m, EINVAL); 4815105197Ssam } 4816105197Ssam#endif 4817105197Ssam 4818105197Ssam /* validity check */ 4819105197Ssam if (sav->sah->saidx.proto != proto) { 4820120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 4821120585Ssam "(DB=%u param=%u)\n", __func__, 4822120585Ssam sav->sah->saidx.proto, proto)); 4823105197Ssam return key_senderror(so, m, EINVAL); 4824105197Ssam } 4825105197Ssam#ifdef IPSEC_DOSEQCHECK 4826105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 4827120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 4828120585Ssam __func__, 4829105197Ssam (u_int32_t)ntohl(sav->spi), 4830105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4831105197Ssam return key_senderror(so, m, EINVAL); 4832105197Ssam } 4833105197Ssam#endif 4834105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 4835120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 4836120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 4837105197Ssam return key_senderror(so, m, EINVAL); 4838105197Ssam } 4839105197Ssam 4840105197Ssam /* copy sav values */ 4841105197Ssam error = key_setsaval(sav, m, mhp); 4842105197Ssam if (error) { 4843105197Ssam KEY_FREESAV(&sav); 4844105197Ssam return key_senderror(so, m, error); 4845105197Ssam } 4846105197Ssam 4847105197Ssam /* check SA values to be mature. */ 4848105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 4849105197Ssam KEY_FREESAV(&sav); 4850105197Ssam return key_senderror(so, m, 0); 4851105197Ssam } 4852105197Ssam 4853105197Ssam { 4854105197Ssam struct mbuf *n; 4855105197Ssam 4856105197Ssam /* set msg buf from mhp */ 4857105197Ssam n = key_getmsgbuf_x1(m, mhp); 4858105197Ssam if (n == NULL) { 4859120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4860105197Ssam return key_senderror(so, m, ENOBUFS); 4861105197Ssam } 4862105197Ssam 4863105197Ssam m_freem(m); 4864105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4865105197Ssam } 4866105197Ssam} 4867105197Ssam 4868105197Ssam/* 4869105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 4870105197Ssam * only called by key_update(). 4871105197Ssam * OUT: 4872105197Ssam * NULL : not found 4873105197Ssam * others : found, pointer to a SA. 4874105197Ssam */ 4875105197Ssam#ifdef IPSEC_DOSEQCHECK 4876105197Ssamstatic struct secasvar * 4877105197Ssamkey_getsavbyseq(sah, seq) 4878105197Ssam struct secashead *sah; 4879105197Ssam u_int32_t seq; 4880105197Ssam{ 4881105197Ssam struct secasvar *sav; 4882105197Ssam u_int state; 4883105197Ssam 4884105197Ssam state = SADB_SASTATE_LARVAL; 4885105197Ssam 4886105197Ssam /* search SAD with sequence number ? */ 4887105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 4888105197Ssam 4889120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 4890105197Ssam 4891105197Ssam if (sav->seq == seq) { 4892158767Spjd sa_addref(sav); 4893105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 4894120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 4895120585Ssam __func__, sav->refcnt, sav)); 4896105197Ssam return sav; 4897105197Ssam } 4898105197Ssam } 4899105197Ssam 4900105197Ssam return NULL; 4901105197Ssam} 4902105197Ssam#endif 4903105197Ssam 4904105197Ssam/* 4905105197Ssam * SADB_ADD processing 4906108533Sschweikh * add an entry to SA database, when received 4907105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4908105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4909105197Ssam * from the ikmpd, 4910105197Ssam * and send 4911105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4912105197Ssam * (identity(SD),) (sensitivity)> 4913105197Ssam * to the ikmpd. 4914105197Ssam * 4915105197Ssam * IGNORE identity and sensitivity messages. 4916105197Ssam * 4917105197Ssam * m will always be freed. 4918105197Ssam */ 4919105197Ssamstatic int 4920105197Ssamkey_add(so, m, mhp) 4921105197Ssam struct socket *so; 4922105197Ssam struct mbuf *m; 4923105197Ssam const struct sadb_msghdr *mhp; 4924105197Ssam{ 4925183550Szec INIT_VNET_IPSEC(curvnet); 4926105197Ssam struct sadb_sa *sa0; 4927105197Ssam struct sadb_address *src0, *dst0; 4928105197Ssam struct secasindex saidx; 4929105197Ssam struct secashead *newsah; 4930105197Ssam struct secasvar *newsav; 4931105197Ssam u_int16_t proto; 4932105197Ssam u_int8_t mode; 4933105197Ssam u_int32_t reqid; 4934105197Ssam int error; 4935105197Ssam 4936120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4937120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4938120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4939120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4940105197Ssam 4941105197Ssam /* map satype to proto */ 4942105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4943120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4944120585Ssam __func__)); 4945105197Ssam return key_senderror(so, m, EINVAL); 4946105197Ssam } 4947105197Ssam 4948105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4949105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4950105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4951105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4952105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4953105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4954105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4955105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4956105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4957105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4958105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4959120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4960120585Ssam __func__)); 4961105197Ssam return key_senderror(so, m, EINVAL); 4962105197Ssam } 4963105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4964105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4965105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4966105197Ssam /* XXX need more */ 4967120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4968120585Ssam __func__)); 4969105197Ssam return key_senderror(so, m, EINVAL); 4970105197Ssam } 4971105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4972105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4973105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4974105197Ssam } else { 4975105197Ssam mode = IPSEC_MODE_ANY; 4976105197Ssam reqid = 0; 4977105197Ssam } 4978105197Ssam 4979105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4980105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4981105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4982105197Ssam 4983105197Ssam /* XXX boundary check against sa_len */ 4984105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4985105197Ssam 4986105197Ssam /* get a SA header */ 4987105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4988105197Ssam /* create a new SA header */ 4989105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4990120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4991105197Ssam return key_senderror(so, m, ENOBUFS); 4992105197Ssam } 4993105197Ssam } 4994105197Ssam 4995105197Ssam /* set spidx if there */ 4996105197Ssam /* XXX rewrite */ 4997105197Ssam error = key_setident(newsah, m, mhp); 4998105197Ssam if (error) { 4999105197Ssam return key_senderror(so, m, error); 5000105197Ssam } 5001105197Ssam 5002105197Ssam /* create new SA entry. */ 5003105197Ssam /* We can create new SA only if SPI is differenct. */ 5004120585Ssam SAHTREE_LOCK(); 5005120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5006120585Ssam SAHTREE_UNLOCK(); 5007120585Ssam if (newsav != NULL) { 5008120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5009105197Ssam return key_senderror(so, m, EEXIST); 5010105197Ssam } 5011105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5012105197Ssam if (newsav == NULL) { 5013105197Ssam return key_senderror(so, m, error); 5014105197Ssam } 5015105197Ssam 5016105197Ssam /* check SA values to be mature. */ 5017105197Ssam if ((error = key_mature(newsav)) != 0) { 5018105197Ssam KEY_FREESAV(&newsav); 5019105197Ssam return key_senderror(so, m, error); 5020105197Ssam } 5021105197Ssam 5022105197Ssam /* 5023105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5024105197Ssam * in the database on success. 5025105197Ssam */ 5026105197Ssam 5027105197Ssam { 5028105197Ssam struct mbuf *n; 5029105197Ssam 5030105197Ssam /* set msg buf from mhp */ 5031105197Ssam n = key_getmsgbuf_x1(m, mhp); 5032105197Ssam if (n == NULL) { 5033120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5034105197Ssam return key_senderror(so, m, ENOBUFS); 5035105197Ssam } 5036105197Ssam 5037105197Ssam m_freem(m); 5038105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5039105197Ssam } 5040105197Ssam} 5041105197Ssam 5042105197Ssam/* m is retained */ 5043105197Ssamstatic int 5044105197Ssamkey_setident(sah, m, mhp) 5045105197Ssam struct secashead *sah; 5046105197Ssam struct mbuf *m; 5047105197Ssam const struct sadb_msghdr *mhp; 5048105197Ssam{ 5049183550Szec INIT_VNET_IPSEC(curvnet); 5050105197Ssam const struct sadb_ident *idsrc, *iddst; 5051105197Ssam int idsrclen, iddstlen; 5052105197Ssam 5053120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5054120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5055120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5056120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5057105197Ssam 5058105197Ssam /* don't make buffer if not there */ 5059105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5060105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5061105197Ssam sah->idents = NULL; 5062105197Ssam sah->identd = NULL; 5063105197Ssam return 0; 5064105197Ssam } 5065105197Ssam 5066105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5067105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5068120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5069105197Ssam return EINVAL; 5070105197Ssam } 5071105197Ssam 5072105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5073105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5074105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5075105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5076105197Ssam 5077105197Ssam /* validity check */ 5078105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5079120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5080105197Ssam return EINVAL; 5081105197Ssam } 5082105197Ssam 5083105197Ssam switch (idsrc->sadb_ident_type) { 5084105197Ssam case SADB_IDENTTYPE_PREFIX: 5085105197Ssam case SADB_IDENTTYPE_FQDN: 5086105197Ssam case SADB_IDENTTYPE_USERFQDN: 5087105197Ssam default: 5088105197Ssam /* XXX do nothing */ 5089105197Ssam sah->idents = NULL; 5090105197Ssam sah->identd = NULL; 5091105197Ssam return 0; 5092105197Ssam } 5093105197Ssam 5094105197Ssam /* make structure */ 5095157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5096105197Ssam if (sah->idents == NULL) { 5097120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5098105197Ssam return ENOBUFS; 5099105197Ssam } 5100157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5101105197Ssam if (sah->identd == NULL) { 5102119643Ssam free(sah->idents, M_IPSEC_MISC); 5103105197Ssam sah->idents = NULL; 5104120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5105105197Ssam return ENOBUFS; 5106105197Ssam } 5107157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5108157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5109105197Ssam 5110157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5111157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5112157123Sgnn 5113105197Ssam return 0; 5114105197Ssam} 5115105197Ssam 5116105197Ssam/* 5117105197Ssam * m will not be freed on return. 5118105197Ssam * it is caller's responsibility to free the result. 5119105197Ssam */ 5120105197Ssamstatic struct mbuf * 5121105197Ssamkey_getmsgbuf_x1(m, mhp) 5122105197Ssam struct mbuf *m; 5123105197Ssam const struct sadb_msghdr *mhp; 5124105197Ssam{ 5125105197Ssam struct mbuf *n; 5126105197Ssam 5127120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5128120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5129120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5130105197Ssam 5131105197Ssam /* create new sadb_msg to reply. */ 5132105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5133105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5134105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5135105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5136105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5137105197Ssam if (!n) 5138105197Ssam return NULL; 5139105197Ssam 5140105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5141105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5142105197Ssam if (n == NULL) 5143105197Ssam return NULL; 5144105197Ssam } 5145105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5146105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5147105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5148105197Ssam 5149105197Ssam return n; 5150105197Ssam} 5151105197Ssam 5152105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5153105197Ssam const struct sadb_msghdr *, u_int16_t)); 5154105197Ssam 5155105197Ssam/* 5156105197Ssam * SADB_DELETE processing 5157105197Ssam * receive 5158105197Ssam * <base, SA(*), address(SD)> 5159105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5160105197Ssam * and send, 5161105197Ssam * <base, SA(*), address(SD)> 5162105197Ssam * to the ikmpd. 5163105197Ssam * 5164105197Ssam * m will always be freed. 5165105197Ssam */ 5166105197Ssamstatic int 5167105197Ssamkey_delete(so, m, mhp) 5168105197Ssam struct socket *so; 5169105197Ssam struct mbuf *m; 5170105197Ssam const struct sadb_msghdr *mhp; 5171105197Ssam{ 5172183550Szec INIT_VNET_IPSEC(curvnet); 5173105197Ssam struct sadb_sa *sa0; 5174105197Ssam struct sadb_address *src0, *dst0; 5175105197Ssam struct secasindex saidx; 5176105197Ssam struct secashead *sah; 5177105197Ssam struct secasvar *sav = NULL; 5178105197Ssam u_int16_t proto; 5179105197Ssam 5180120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5181120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5182120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5183120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5184105197Ssam 5185105197Ssam /* map satype to proto */ 5186105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5187120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5188120585Ssam __func__)); 5189105197Ssam return key_senderror(so, m, EINVAL); 5190105197Ssam } 5191105197Ssam 5192105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5193105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5194120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5195120585Ssam __func__)); 5196105197Ssam return key_senderror(so, m, EINVAL); 5197105197Ssam } 5198105197Ssam 5199105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5200105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5201120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5202120585Ssam __func__)); 5203105197Ssam return key_senderror(so, m, EINVAL); 5204105197Ssam } 5205105197Ssam 5206105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5207105197Ssam /* 5208105197Ssam * Caller wants us to delete all non-LARVAL SAs 5209105197Ssam * that match the src/dst. This is used during 5210105197Ssam * IKE INITIAL-CONTACT. 5211105197Ssam */ 5212120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5213105197Ssam return key_delete_all(so, m, mhp, proto); 5214105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5215120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5216120585Ssam __func__)); 5217105197Ssam return key_senderror(so, m, EINVAL); 5218105197Ssam } 5219105197Ssam 5220105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5221105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5222105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5223105197Ssam 5224105197Ssam /* XXX boundary check against sa_len */ 5225105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5226105197Ssam 5227105197Ssam /* get a SA header */ 5228120585Ssam SAHTREE_LOCK(); 5229181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5230105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5231105197Ssam continue; 5232105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5233105197Ssam continue; 5234105197Ssam 5235105197Ssam /* get a SA with SPI. */ 5236105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5237105197Ssam if (sav) 5238105197Ssam break; 5239105197Ssam } 5240105197Ssam if (sah == NULL) { 5241120585Ssam SAHTREE_UNLOCK(); 5242120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5243105197Ssam return key_senderror(so, m, ENOENT); 5244105197Ssam } 5245105197Ssam 5246105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5247120585Ssam SAHTREE_UNLOCK(); 5248105197Ssam KEY_FREESAV(&sav); 5249105197Ssam 5250105197Ssam { 5251105197Ssam struct mbuf *n; 5252105197Ssam struct sadb_msg *newmsg; 5253105197Ssam 5254105197Ssam /* create new sadb_msg to reply. */ 5255105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5256105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5257105197Ssam if (!n) 5258105197Ssam return key_senderror(so, m, ENOBUFS); 5259105197Ssam 5260105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5261105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5262105197Ssam if (n == NULL) 5263105197Ssam return key_senderror(so, m, ENOBUFS); 5264105197Ssam } 5265105197Ssam newmsg = mtod(n, struct sadb_msg *); 5266105197Ssam newmsg->sadb_msg_errno = 0; 5267105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5268105197Ssam 5269105197Ssam m_freem(m); 5270105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5271105197Ssam } 5272105197Ssam} 5273105197Ssam 5274105197Ssam/* 5275105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5276105197Ssam */ 5277105197Ssamstatic int 5278189004Srdivackykey_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5279189004Srdivacky u_int16_t proto) 5280105197Ssam{ 5281183550Szec INIT_VNET_IPSEC(curvnet); 5282105197Ssam struct sadb_address *src0, *dst0; 5283105197Ssam struct secasindex saidx; 5284105197Ssam struct secashead *sah; 5285105197Ssam struct secasvar *sav, *nextsav; 5286105197Ssam u_int stateidx, state; 5287105197Ssam 5288105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5289105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5290105197Ssam 5291105197Ssam /* XXX boundary check against sa_len */ 5292105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5293105197Ssam 5294120585Ssam SAHTREE_LOCK(); 5295181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5296105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5297105197Ssam continue; 5298105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5299105197Ssam continue; 5300105197Ssam 5301105197Ssam /* Delete all non-LARVAL SAs. */ 5302105197Ssam for (stateidx = 0; 5303185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5304105197Ssam stateidx++) { 5305185348Szec state = saorder_state_alive[stateidx]; 5306105197Ssam if (state == SADB_SASTATE_LARVAL) 5307105197Ssam continue; 5308105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5309105197Ssam sav != NULL; sav = nextsav) { 5310105197Ssam nextsav = LIST_NEXT(sav, chain); 5311105197Ssam /* sanity check */ 5312105197Ssam if (sav->state != state) { 5313120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5314120585Ssam "sav->state (queue %d SA %d)\n", 5315120585Ssam __func__, state, sav->state)); 5316105197Ssam continue; 5317105197Ssam } 5318105197Ssam 5319105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5320105197Ssam KEY_FREESAV(&sav); 5321105197Ssam } 5322105197Ssam } 5323105197Ssam } 5324120585Ssam SAHTREE_UNLOCK(); 5325105197Ssam { 5326105197Ssam struct mbuf *n; 5327105197Ssam struct sadb_msg *newmsg; 5328105197Ssam 5329105197Ssam /* create new sadb_msg to reply. */ 5330105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5331105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5332105197Ssam if (!n) 5333105197Ssam return key_senderror(so, m, ENOBUFS); 5334105197Ssam 5335105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5336105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5337105197Ssam if (n == NULL) 5338105197Ssam return key_senderror(so, m, ENOBUFS); 5339105197Ssam } 5340105197Ssam newmsg = mtod(n, struct sadb_msg *); 5341105197Ssam newmsg->sadb_msg_errno = 0; 5342105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5343105197Ssam 5344105197Ssam m_freem(m); 5345105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5346105197Ssam } 5347105197Ssam} 5348105197Ssam 5349105197Ssam/* 5350105197Ssam * SADB_GET processing 5351105197Ssam * receive 5352105197Ssam * <base, SA(*), address(SD)> 5353105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5354105197Ssam * and send, 5355105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5356105197Ssam * (identity(SD),) (sensitivity)> 5357105197Ssam * to the ikmpd. 5358105197Ssam * 5359105197Ssam * m will always be freed. 5360105197Ssam */ 5361105197Ssamstatic int 5362105197Ssamkey_get(so, m, mhp) 5363105197Ssam struct socket *so; 5364105197Ssam struct mbuf *m; 5365105197Ssam const struct sadb_msghdr *mhp; 5366105197Ssam{ 5367183550Szec INIT_VNET_IPSEC(curvnet); 5368105197Ssam struct sadb_sa *sa0; 5369105197Ssam struct sadb_address *src0, *dst0; 5370105197Ssam struct secasindex saidx; 5371105197Ssam struct secashead *sah; 5372105197Ssam struct secasvar *sav = NULL; 5373105197Ssam u_int16_t proto; 5374105197Ssam 5375120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5376120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5377120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5378120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5379105197Ssam 5380105197Ssam /* map satype to proto */ 5381105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5382120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5383120585Ssam __func__)); 5384105197Ssam return key_senderror(so, m, EINVAL); 5385105197Ssam } 5386105197Ssam 5387105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5388105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5389105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5390120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5391120585Ssam __func__)); 5392105197Ssam return key_senderror(so, m, EINVAL); 5393105197Ssam } 5394105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5395105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5396105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5397120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5398120585Ssam __func__)); 5399105197Ssam return key_senderror(so, m, EINVAL); 5400105197Ssam } 5401105197Ssam 5402105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5403105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5404105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5405105197Ssam 5406105197Ssam /* XXX boundary check against sa_len */ 5407105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5408105197Ssam 5409105197Ssam /* get a SA header */ 5410120585Ssam SAHTREE_LOCK(); 5411181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5412105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5413105197Ssam continue; 5414105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5415105197Ssam continue; 5416105197Ssam 5417105197Ssam /* get a SA with SPI. */ 5418105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5419105197Ssam if (sav) 5420105197Ssam break; 5421105197Ssam } 5422120585Ssam SAHTREE_UNLOCK(); 5423105197Ssam if (sah == NULL) { 5424120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5425105197Ssam return key_senderror(so, m, ENOENT); 5426105197Ssam } 5427105197Ssam 5428105197Ssam { 5429105197Ssam struct mbuf *n; 5430105197Ssam u_int8_t satype; 5431105197Ssam 5432105197Ssam /* map proto to satype */ 5433105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5434120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5435120585Ssam __func__)); 5436105197Ssam return key_senderror(so, m, EINVAL); 5437105197Ssam } 5438105197Ssam 5439105197Ssam /* create new sadb_msg to reply. */ 5440105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5441105197Ssam mhp->msg->sadb_msg_pid); 5442105197Ssam if (!n) 5443105197Ssam return key_senderror(so, m, ENOBUFS); 5444105197Ssam 5445105197Ssam m_freem(m); 5446105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5447105197Ssam } 5448105197Ssam} 5449105197Ssam 5450105197Ssam/* XXX make it sysctl-configurable? */ 5451105197Ssamstatic void 5452105197Ssamkey_getcomb_setlifetime(comb) 5453105197Ssam struct sadb_comb *comb; 5454105197Ssam{ 5455105197Ssam 5456105197Ssam comb->sadb_comb_soft_allocations = 1; 5457105197Ssam comb->sadb_comb_hard_allocations = 1; 5458105197Ssam comb->sadb_comb_soft_bytes = 0; 5459105197Ssam comb->sadb_comb_hard_bytes = 0; 5460105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5461105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5462105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5463105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5464105197Ssam} 5465105197Ssam 5466105197Ssam/* 5467105197Ssam * XXX reorder combinations by preference 5468105197Ssam * XXX no idea if the user wants ESP authentication or not 5469105197Ssam */ 5470105197Ssamstatic struct mbuf * 5471105197Ssamkey_getcomb_esp() 5472105197Ssam{ 5473183550Szec INIT_VNET_IPSEC(curvnet); 5474105197Ssam struct sadb_comb *comb; 5475105197Ssam struct enc_xform *algo; 5476105197Ssam struct mbuf *result = NULL, *m, *n; 5477105197Ssam int encmin; 5478105197Ssam int i, off, o; 5479105197Ssam int totlen; 5480105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5481105197Ssam 5482105197Ssam m = NULL; 5483105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 5484105197Ssam algo = esp_algorithm_lookup(i); 5485105197Ssam if (algo == NULL) 5486105197Ssam continue; 5487105197Ssam 5488105197Ssam /* discard algorithms with key size smaller than system min */ 5489181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 5490105197Ssam continue; 5491181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 5492181803Sbz encmin = V_ipsec_esp_keymin; 5493105197Ssam else 5494105197Ssam encmin = _BITS(algo->minkey); 5495105197Ssam 5496181803Sbz if (V_ipsec_esp_auth) 5497105197Ssam m = key_getcomb_ah(); 5498105197Ssam else { 5499120585Ssam IPSEC_ASSERT(l <= MLEN, 5500120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5501111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5502105197Ssam if (m) { 5503105197Ssam M_ALIGN(m, l); 5504105197Ssam m->m_len = l; 5505105197Ssam m->m_next = NULL; 5506105197Ssam bzero(mtod(m, caddr_t), m->m_len); 5507105197Ssam } 5508105197Ssam } 5509105197Ssam if (!m) 5510105197Ssam goto fail; 5511105197Ssam 5512105197Ssam totlen = 0; 5513105197Ssam for (n = m; n; n = n->m_next) 5514105197Ssam totlen += n->m_len; 5515120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 5516105197Ssam 5517105197Ssam for (off = 0; off < totlen; off += l) { 5518105197Ssam n = m_pulldown(m, off, l, &o); 5519105197Ssam if (!n) { 5520105197Ssam /* m is already freed */ 5521105197Ssam goto fail; 5522105197Ssam } 5523105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5524105197Ssam bzero(comb, sizeof(*comb)); 5525105197Ssam key_getcomb_setlifetime(comb); 5526105197Ssam comb->sadb_comb_encrypt = i; 5527105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 5528105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5529105197Ssam } 5530105197Ssam 5531105197Ssam if (!result) 5532105197Ssam result = m; 5533105197Ssam else 5534105197Ssam m_cat(result, m); 5535105197Ssam } 5536105197Ssam 5537105197Ssam return result; 5538105197Ssam 5539105197Ssam fail: 5540105197Ssam if (result) 5541105197Ssam m_freem(result); 5542105197Ssam return NULL; 5543105197Ssam} 5544105197Ssam 5545105197Ssamstatic void 5546105197Ssamkey_getsizes_ah( 5547105197Ssam const struct auth_hash *ah, 5548105197Ssam int alg, 5549105197Ssam u_int16_t* min, 5550105197Ssam u_int16_t* max) 5551105197Ssam{ 5552183550Szec INIT_VNET_IPSEC(curvnet); 5553183550Szec 5554105197Ssam *min = *max = ah->keysize; 5555105197Ssam if (ah->keysize == 0) { 5556105197Ssam /* 5557105197Ssam * Transform takes arbitrary key size but algorithm 5558105197Ssam * key size is restricted. Enforce this here. 5559105197Ssam */ 5560105197Ssam switch (alg) { 5561105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 5562105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 5563105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 5564105197Ssam default: 5565120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 5566120585Ssam __func__, alg)); 5567105197Ssam break; 5568105197Ssam } 5569105197Ssam } 5570105197Ssam} 5571105197Ssam 5572105197Ssam/* 5573105197Ssam * XXX reorder combinations by preference 5574105197Ssam */ 5575105197Ssamstatic struct mbuf * 5576105197Ssamkey_getcomb_ah() 5577105197Ssam{ 5578183550Szec INIT_VNET_IPSEC(curvnet); 5579105197Ssam struct sadb_comb *comb; 5580105197Ssam struct auth_hash *algo; 5581105197Ssam struct mbuf *m; 5582105197Ssam u_int16_t minkeysize, maxkeysize; 5583105197Ssam int i; 5584105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5585105197Ssam 5586105197Ssam m = NULL; 5587105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 5588105197Ssam#if 1 5589105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 5590105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5591105197Ssam continue; 5592105197Ssam#endif 5593105197Ssam algo = ah_algorithm_lookup(i); 5594105197Ssam if (!algo) 5595105197Ssam continue; 5596105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5597105197Ssam /* discard algorithms with key size smaller than system min */ 5598181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 5599105197Ssam continue; 5600105197Ssam 5601105197Ssam if (!m) { 5602120585Ssam IPSEC_ASSERT(l <= MLEN, 5603120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5604111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5605105197Ssam if (m) { 5606105197Ssam M_ALIGN(m, l); 5607105197Ssam m->m_len = l; 5608105197Ssam m->m_next = NULL; 5609105197Ssam } 5610105197Ssam } else 5611111119Simp M_PREPEND(m, l, M_DONTWAIT); 5612105197Ssam if (!m) 5613105197Ssam return NULL; 5614105197Ssam 5615105197Ssam comb = mtod(m, struct sadb_comb *); 5616105197Ssam bzero(comb, sizeof(*comb)); 5617105197Ssam key_getcomb_setlifetime(comb); 5618105197Ssam comb->sadb_comb_auth = i; 5619105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5620105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5621105197Ssam } 5622105197Ssam 5623105197Ssam return m; 5624105197Ssam} 5625105197Ssam 5626105197Ssam/* 5627105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 5628105197Ssam * XXX reorder combinations by preference 5629105197Ssam */ 5630105197Ssamstatic struct mbuf * 5631105197Ssamkey_getcomb_ipcomp() 5632105197Ssam{ 5633105197Ssam struct sadb_comb *comb; 5634105197Ssam struct comp_algo *algo; 5635105197Ssam struct mbuf *m; 5636105197Ssam int i; 5637105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5638105197Ssam 5639105197Ssam m = NULL; 5640105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5641105197Ssam algo = ipcomp_algorithm_lookup(i); 5642105197Ssam if (!algo) 5643105197Ssam continue; 5644105197Ssam 5645105197Ssam if (!m) { 5646120585Ssam IPSEC_ASSERT(l <= MLEN, 5647120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5648111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5649105197Ssam if (m) { 5650105197Ssam M_ALIGN(m, l); 5651105197Ssam m->m_len = l; 5652105197Ssam m->m_next = NULL; 5653105197Ssam } 5654105197Ssam } else 5655111119Simp M_PREPEND(m, l, M_DONTWAIT); 5656105197Ssam if (!m) 5657105197Ssam return NULL; 5658105197Ssam 5659105197Ssam comb = mtod(m, struct sadb_comb *); 5660105197Ssam bzero(comb, sizeof(*comb)); 5661105197Ssam key_getcomb_setlifetime(comb); 5662105197Ssam comb->sadb_comb_encrypt = i; 5663105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 5664105197Ssam } 5665105197Ssam 5666105197Ssam return m; 5667105197Ssam} 5668105197Ssam 5669105197Ssam/* 5670105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 5671105197Ssam * XXX replay checking? 5672105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 5673105197Ssam */ 5674105197Ssamstatic struct mbuf * 5675105197Ssamkey_getprop(saidx) 5676105197Ssam const struct secasindex *saidx; 5677105197Ssam{ 5678105197Ssam struct sadb_prop *prop; 5679105197Ssam struct mbuf *m, *n; 5680105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5681105197Ssam int totlen; 5682105197Ssam 5683105197Ssam switch (saidx->proto) { 5684105197Ssam case IPPROTO_ESP: 5685105197Ssam m = key_getcomb_esp(); 5686105197Ssam break; 5687105197Ssam case IPPROTO_AH: 5688105197Ssam m = key_getcomb_ah(); 5689105197Ssam break; 5690105197Ssam case IPPROTO_IPCOMP: 5691105197Ssam m = key_getcomb_ipcomp(); 5692105197Ssam break; 5693105197Ssam default: 5694105197Ssam return NULL; 5695105197Ssam } 5696105197Ssam 5697105197Ssam if (!m) 5698105197Ssam return NULL; 5699111119Simp M_PREPEND(m, l, M_DONTWAIT); 5700105197Ssam if (!m) 5701105197Ssam return NULL; 5702105197Ssam 5703105197Ssam totlen = 0; 5704105197Ssam for (n = m; n; n = n->m_next) 5705105197Ssam totlen += n->m_len; 5706105197Ssam 5707105197Ssam prop = mtod(m, struct sadb_prop *); 5708105197Ssam bzero(prop, sizeof(*prop)); 5709105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5710105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5711105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 5712105197Ssam 5713105197Ssam return m; 5714105197Ssam} 5715105197Ssam 5716105197Ssam/* 5717105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5718105197Ssam * send 5719105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 5720105197Ssam * (identity(SD),) (sensitivity,) proposal> 5721105197Ssam * to KMD, and expect to receive 5722105197Ssam * <base> with SADB_ACQUIRE if error occured, 5723105197Ssam * or 5724105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5725105197Ssam * from KMD by PF_KEY. 5726105197Ssam * 5727105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 5728105197Ssam * XXX sensitivity is not supported. 5729105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5730105197Ssam * see comment for key_getcomb_ipcomp(). 5731105197Ssam * 5732105197Ssam * OUT: 5733105197Ssam * 0 : succeed 5734105197Ssam * others: error number 5735105197Ssam */ 5736105197Ssamstatic int 5737105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5738105197Ssam{ 5739183550Szec INIT_VNET_IPSEC(curvnet); 5740105197Ssam struct mbuf *result = NULL, *m; 5741105197Ssam struct secacq *newacq; 5742105197Ssam u_int8_t satype; 5743105197Ssam int error = -1; 5744105197Ssam u_int32_t seq; 5745105197Ssam 5746120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 5747105197Ssam satype = key_proto2satype(saidx->proto); 5748120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 5749105197Ssam 5750105197Ssam /* 5751105197Ssam * We never do anything about acquirng SA. There is anather 5752105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 5753105197Ssam * getting something message from IKEd. In later case, to be 5754105197Ssam * managed with ACQUIRING list. 5755105197Ssam */ 5756108533Sschweikh /* Get an entry to check whether sending message or not. */ 5757105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 5758181803Sbz if (V_key_blockacq_count < newacq->count) { 5759105197Ssam /* reset counter and do send message. */ 5760105197Ssam newacq->count = 0; 5761105197Ssam } else { 5762105197Ssam /* increment counter and do nothing. */ 5763105197Ssam newacq->count++; 5764105197Ssam return 0; 5765105197Ssam } 5766105197Ssam } else { 5767105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 5768105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 5769105197Ssam return ENOBUFS; 5770105197Ssam } 5771105197Ssam 5772105197Ssam 5773105197Ssam seq = newacq->seq; 5774105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5775105197Ssam if (!m) { 5776105197Ssam error = ENOBUFS; 5777105197Ssam goto fail; 5778105197Ssam } 5779105197Ssam result = m; 5780105197Ssam 5781105197Ssam /* set sadb_address for saidx's. */ 5782105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5783105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5784105197Ssam if (!m) { 5785105197Ssam error = ENOBUFS; 5786105197Ssam goto fail; 5787105197Ssam } 5788105197Ssam m_cat(result, m); 5789105197Ssam 5790105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5791105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5792105197Ssam if (!m) { 5793105197Ssam error = ENOBUFS; 5794105197Ssam goto fail; 5795105197Ssam } 5796105197Ssam m_cat(result, m); 5797105197Ssam 5798105197Ssam /* XXX proxy address (optional) */ 5799105197Ssam 5800105197Ssam /* set sadb_x_policy */ 5801105197Ssam if (sp) { 5802105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5803105197Ssam if (!m) { 5804105197Ssam error = ENOBUFS; 5805105197Ssam goto fail; 5806105197Ssam } 5807105197Ssam m_cat(result, m); 5808105197Ssam } 5809105197Ssam 5810105197Ssam /* XXX identity (optional) */ 5811105197Ssam#if 0 5812105197Ssam if (idexttype && fqdn) { 5813105197Ssam /* create identity extension (FQDN) */ 5814105197Ssam struct sadb_ident *id; 5815105197Ssam int fqdnlen; 5816105197Ssam 5817105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5818105197Ssam id = (struct sadb_ident *)p; 5819105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5820105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5821105197Ssam id->sadb_ident_exttype = idexttype; 5822105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5823105197Ssam bcopy(fqdn, id + 1, fqdnlen); 5824105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5825105197Ssam } 5826105197Ssam 5827105197Ssam if (idexttype) { 5828105197Ssam /* create identity extension (USERFQDN) */ 5829105197Ssam struct sadb_ident *id; 5830105197Ssam int userfqdnlen; 5831105197Ssam 5832105197Ssam if (userfqdn) { 5833105197Ssam /* +1 for terminating-NUL */ 5834105197Ssam userfqdnlen = strlen(userfqdn) + 1; 5835105197Ssam } else 5836105197Ssam userfqdnlen = 0; 5837105197Ssam id = (struct sadb_ident *)p; 5838105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5839105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5840105197Ssam id->sadb_ident_exttype = idexttype; 5841105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5842105197Ssam /* XXX is it correct? */ 5843105197Ssam if (curproc && curproc->p_cred) 5844105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 5845105197Ssam if (userfqdn && userfqdnlen) 5846105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 5847105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5848105197Ssam } 5849105197Ssam#endif 5850105197Ssam 5851105197Ssam /* XXX sensitivity (optional) */ 5852105197Ssam 5853105197Ssam /* create proposal/combination extension */ 5854105197Ssam m = key_getprop(saidx); 5855105197Ssam#if 0 5856105197Ssam /* 5857105197Ssam * spec conformant: always attach proposal/combination extension, 5858105197Ssam * the problem is that we have no way to attach it for ipcomp, 5859105197Ssam * due to the way sadb_comb is declared in RFC2367. 5860105197Ssam */ 5861105197Ssam if (!m) { 5862105197Ssam error = ENOBUFS; 5863105197Ssam goto fail; 5864105197Ssam } 5865105197Ssam m_cat(result, m); 5866105197Ssam#else 5867105197Ssam /* 5868105197Ssam * outside of spec; make proposal/combination extension optional. 5869105197Ssam */ 5870105197Ssam if (m) 5871105197Ssam m_cat(result, m); 5872105197Ssam#endif 5873105197Ssam 5874105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 5875105197Ssam error = EINVAL; 5876105197Ssam goto fail; 5877105197Ssam } 5878105197Ssam 5879105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 5880105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 5881105197Ssam if (result == NULL) { 5882105197Ssam error = ENOBUFS; 5883105197Ssam goto fail; 5884105197Ssam } 5885105197Ssam } 5886105197Ssam 5887105197Ssam result->m_pkthdr.len = 0; 5888105197Ssam for (m = result; m; m = m->m_next) 5889105197Ssam result->m_pkthdr.len += m->m_len; 5890105197Ssam 5891105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 5892105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 5893105197Ssam 5894105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 5895105197Ssam 5896105197Ssam fail: 5897105197Ssam if (result) 5898105197Ssam m_freem(result); 5899105197Ssam return error; 5900105197Ssam} 5901105197Ssam 5902105197Ssamstatic struct secacq * 5903105197Ssamkey_newacq(const struct secasindex *saidx) 5904105197Ssam{ 5905183550Szec INIT_VNET_IPSEC(curvnet); 5906105197Ssam struct secacq *newacq; 5907105197Ssam 5908105197Ssam /* get new entry */ 5909119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5910105197Ssam if (newacq == NULL) { 5911120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5912105197Ssam return NULL; 5913105197Ssam } 5914105197Ssam 5915105197Ssam /* copy secindex */ 5916105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 5917181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 5918105197Ssam newacq->created = time_second; 5919105197Ssam newacq->count = 0; 5920105197Ssam 5921119643Ssam /* add to acqtree */ 5922120585Ssam ACQ_LOCK(); 5923181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 5924120585Ssam ACQ_UNLOCK(); 5925119643Ssam 5926105197Ssam return newacq; 5927105197Ssam} 5928105197Ssam 5929105197Ssamstatic struct secacq * 5930105197Ssamkey_getacq(const struct secasindex *saidx) 5931105197Ssam{ 5932183550Szec INIT_VNET_IPSEC(curvnet); 5933105197Ssam struct secacq *acq; 5934105197Ssam 5935120585Ssam ACQ_LOCK(); 5936181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5937105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 5938119643Ssam break; 5939105197Ssam } 5940120585Ssam ACQ_UNLOCK(); 5941105197Ssam 5942119643Ssam return acq; 5943105197Ssam} 5944105197Ssam 5945105197Ssamstatic struct secacq * 5946105197Ssamkey_getacqbyseq(seq) 5947105197Ssam u_int32_t seq; 5948105197Ssam{ 5949183550Szec INIT_VNET_IPSEC(curvnet); 5950105197Ssam struct secacq *acq; 5951105197Ssam 5952120585Ssam ACQ_LOCK(); 5953181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5954105197Ssam if (acq->seq == seq) 5955119643Ssam break; 5956105197Ssam } 5957120585Ssam ACQ_UNLOCK(); 5958105197Ssam 5959119643Ssam return acq; 5960105197Ssam} 5961105197Ssam 5962105197Ssamstatic struct secspacq * 5963105197Ssamkey_newspacq(spidx) 5964105197Ssam struct secpolicyindex *spidx; 5965105197Ssam{ 5966183550Szec INIT_VNET_IPSEC(curvnet); 5967105197Ssam struct secspacq *acq; 5968105197Ssam 5969105197Ssam /* get new entry */ 5970119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5971105197Ssam if (acq == NULL) { 5972120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5973105197Ssam return NULL; 5974105197Ssam } 5975105197Ssam 5976105197Ssam /* copy secindex */ 5977105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 5978105197Ssam acq->created = time_second; 5979105197Ssam acq->count = 0; 5980105197Ssam 5981119643Ssam /* add to spacqtree */ 5982120585Ssam SPACQ_LOCK(); 5983181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 5984120585Ssam SPACQ_UNLOCK(); 5985119643Ssam 5986105197Ssam return acq; 5987105197Ssam} 5988105197Ssam 5989105197Ssamstatic struct secspacq * 5990105197Ssamkey_getspacq(spidx) 5991105197Ssam struct secpolicyindex *spidx; 5992105197Ssam{ 5993183550Szec INIT_VNET_IPSEC(curvnet); 5994105197Ssam struct secspacq *acq; 5995105197Ssam 5996120585Ssam SPACQ_LOCK(); 5997181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 5998119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 5999119643Ssam /* NB: return holding spacq_lock */ 6000105197Ssam return acq; 6001119643Ssam } 6002105197Ssam } 6003120585Ssam SPACQ_UNLOCK(); 6004105197Ssam 6005105197Ssam return NULL; 6006105197Ssam} 6007105197Ssam 6008105197Ssam/* 6009105197Ssam * SADB_ACQUIRE processing, 6010105197Ssam * in first situation, is receiving 6011105197Ssam * <base> 6012105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 6013105197Ssam * 6014105197Ssam * In second situation, is receiving 6015105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6016105197Ssam * from a user land process, and return 6017105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6018105197Ssam * to the socket. 6019105197Ssam * 6020105197Ssam * m will always be freed. 6021105197Ssam */ 6022105197Ssamstatic int 6023105197Ssamkey_acquire2(so, m, mhp) 6024105197Ssam struct socket *so; 6025105197Ssam struct mbuf *m; 6026105197Ssam const struct sadb_msghdr *mhp; 6027105197Ssam{ 6028183550Szec INIT_VNET_IPSEC(curvnet); 6029105197Ssam const struct sadb_address *src0, *dst0; 6030105197Ssam struct secasindex saidx; 6031105197Ssam struct secashead *sah; 6032105197Ssam u_int16_t proto; 6033105197Ssam int error; 6034105197Ssam 6035120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6036120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6037120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6038120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6039105197Ssam 6040105197Ssam /* 6041105197Ssam * Error message from KMd. 6042105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6043105197Ssam * message is equal to the size of sadb_msg structure. 6044105197Ssam * We do not raise error even if error occured in this function. 6045105197Ssam */ 6046105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6047105197Ssam struct secacq *acq; 6048105197Ssam 6049105197Ssam /* check sequence number */ 6050105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6051120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6052120585Ssam "number.\n", __func__)); 6053105197Ssam m_freem(m); 6054105197Ssam return 0; 6055105197Ssam } 6056105197Ssam 6057105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6058105197Ssam /* 6059105197Ssam * the specified larval SA is already gone, or we got 6060105197Ssam * a bogus sequence number. we can silently ignore it. 6061105197Ssam */ 6062105197Ssam m_freem(m); 6063105197Ssam return 0; 6064105197Ssam } 6065105197Ssam 6066105197Ssam /* reset acq counter in order to deletion by timehander. */ 6067105197Ssam acq->created = time_second; 6068105197Ssam acq->count = 0; 6069105197Ssam m_freem(m); 6070105197Ssam return 0; 6071105197Ssam } 6072105197Ssam 6073105197Ssam /* 6074105197Ssam * This message is from user land. 6075105197Ssam */ 6076105197Ssam 6077105197Ssam /* map satype to proto */ 6078105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6079120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6080120585Ssam __func__)); 6081105197Ssam return key_senderror(so, m, EINVAL); 6082105197Ssam } 6083105197Ssam 6084105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6085105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6086105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6087105197Ssam /* error */ 6088120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6089120585Ssam __func__)); 6090105197Ssam return key_senderror(so, m, EINVAL); 6091105197Ssam } 6092105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6093105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6094105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6095105197Ssam /* error */ 6096120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6097120585Ssam __func__)); 6098105197Ssam return key_senderror(so, m, EINVAL); 6099105197Ssam } 6100105197Ssam 6101105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6102105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6103105197Ssam 6104105197Ssam /* XXX boundary check against sa_len */ 6105105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6106105197Ssam 6107105197Ssam /* get a SA index */ 6108120585Ssam SAHTREE_LOCK(); 6109181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6110105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6111105197Ssam continue; 6112105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6113105197Ssam break; 6114105197Ssam } 6115120585Ssam SAHTREE_UNLOCK(); 6116105197Ssam if (sah != NULL) { 6117120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6118105197Ssam return key_senderror(so, m, EEXIST); 6119105197Ssam } 6120105197Ssam 6121105197Ssam error = key_acquire(&saidx, NULL); 6122105197Ssam if (error != 0) { 6123120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6124120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6125105197Ssam return key_senderror(so, m, error); 6126105197Ssam } 6127105197Ssam 6128105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6129105197Ssam} 6130105197Ssam 6131105197Ssam/* 6132105197Ssam * SADB_REGISTER processing. 6133105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6134105197Ssam * receive 6135105197Ssam * <base> 6136105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6137105197Ssam * and send 6138105197Ssam * <base, supported> 6139105197Ssam * to KMD by PF_KEY. 6140105197Ssam * If socket is detached, must free from regnode. 6141105197Ssam * 6142105197Ssam * m will always be freed. 6143105197Ssam */ 6144105197Ssamstatic int 6145105197Ssamkey_register(so, m, mhp) 6146105197Ssam struct socket *so; 6147105197Ssam struct mbuf *m; 6148105197Ssam const struct sadb_msghdr *mhp; 6149105197Ssam{ 6150183550Szec INIT_VNET_IPSEC(curvnet); 6151105197Ssam struct secreg *reg, *newreg = 0; 6152105197Ssam 6153120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6154120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6155120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6156120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6157105197Ssam 6158105197Ssam /* check for invalid register message */ 6159181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6160105197Ssam return key_senderror(so, m, EINVAL); 6161105197Ssam 6162105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6163105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6164105197Ssam goto setmsg; 6165105197Ssam 6166105197Ssam /* check whether existing or not */ 6167120585Ssam REGTREE_LOCK(); 6168181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6169105197Ssam if (reg->so == so) { 6170120585Ssam REGTREE_UNLOCK(); 6171120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6172120585Ssam __func__)); 6173105197Ssam return key_senderror(so, m, EEXIST); 6174105197Ssam } 6175105197Ssam } 6176105197Ssam 6177105197Ssam /* create regnode */ 6178119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6179105197Ssam if (newreg == NULL) { 6180120585Ssam REGTREE_UNLOCK(); 6181120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6182105197Ssam return key_senderror(so, m, ENOBUFS); 6183105197Ssam } 6184105197Ssam 6185105197Ssam newreg->so = so; 6186105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6187105197Ssam 6188105197Ssam /* add regnode to regtree. */ 6189181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6190120585Ssam REGTREE_UNLOCK(); 6191105197Ssam 6192105197Ssam setmsg: 6193105197Ssam { 6194105197Ssam struct mbuf *n; 6195105197Ssam struct sadb_msg *newmsg; 6196105197Ssam struct sadb_supported *sup; 6197105197Ssam u_int len, alen, elen; 6198105197Ssam int off; 6199105197Ssam int i; 6200105197Ssam struct sadb_alg *alg; 6201105197Ssam 6202105197Ssam /* create new sadb_msg to reply. */ 6203105197Ssam alen = 0; 6204105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6205105197Ssam if (ah_algorithm_lookup(i)) 6206105197Ssam alen += sizeof(struct sadb_alg); 6207105197Ssam } 6208105197Ssam if (alen) 6209105197Ssam alen += sizeof(struct sadb_supported); 6210105197Ssam elen = 0; 6211105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6212105197Ssam if (esp_algorithm_lookup(i)) 6213105197Ssam elen += sizeof(struct sadb_alg); 6214105197Ssam } 6215105197Ssam if (elen) 6216105197Ssam elen += sizeof(struct sadb_supported); 6217105197Ssam 6218105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6219105197Ssam 6220105197Ssam if (len > MCLBYTES) 6221105197Ssam return key_senderror(so, m, ENOBUFS); 6222105197Ssam 6223111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6224105197Ssam if (len > MHLEN) { 6225111119Simp MCLGET(n, M_DONTWAIT); 6226105197Ssam if ((n->m_flags & M_EXT) == 0) { 6227105197Ssam m_freem(n); 6228105197Ssam n = NULL; 6229105197Ssam } 6230105197Ssam } 6231105197Ssam if (!n) 6232105197Ssam return key_senderror(so, m, ENOBUFS); 6233105197Ssam 6234105197Ssam n->m_pkthdr.len = n->m_len = len; 6235105197Ssam n->m_next = NULL; 6236105197Ssam off = 0; 6237105197Ssam 6238105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6239105197Ssam newmsg = mtod(n, struct sadb_msg *); 6240105197Ssam newmsg->sadb_msg_errno = 0; 6241105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6242105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6243105197Ssam 6244105197Ssam /* for authentication algorithm */ 6245105197Ssam if (alen) { 6246105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6247105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6248105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6249105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6250105197Ssam 6251105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6252105197Ssam struct auth_hash *aalgo; 6253105197Ssam u_int16_t minkeysize, maxkeysize; 6254105197Ssam 6255105197Ssam aalgo = ah_algorithm_lookup(i); 6256105197Ssam if (!aalgo) 6257105197Ssam continue; 6258105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6259105197Ssam alg->sadb_alg_id = i; 6260105197Ssam alg->sadb_alg_ivlen = 0; 6261105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6262105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6263105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6264105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6265105197Ssam } 6266105197Ssam } 6267105197Ssam 6268105197Ssam /* for encryption algorithm */ 6269105197Ssam if (elen) { 6270105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6271105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6272105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6273105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6274105197Ssam 6275105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6276105197Ssam struct enc_xform *ealgo; 6277105197Ssam 6278105197Ssam ealgo = esp_algorithm_lookup(i); 6279105197Ssam if (!ealgo) 6280105197Ssam continue; 6281105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6282105197Ssam alg->sadb_alg_id = i; 6283105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6284105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6285105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6286105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6287105197Ssam } 6288105197Ssam } 6289105197Ssam 6290120585Ssam IPSEC_ASSERT(off == len, 6291120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6292105197Ssam 6293105197Ssam m_freem(m); 6294105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6295105197Ssam } 6296105197Ssam} 6297105197Ssam 6298105197Ssam/* 6299105197Ssam * free secreg entry registered. 6300105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6301105197Ssam */ 6302105197Ssamvoid 6303119643Ssamkey_freereg(struct socket *so) 6304105197Ssam{ 6305183550Szec INIT_VNET_IPSEC(curvnet); 6306105197Ssam struct secreg *reg; 6307105197Ssam int i; 6308105197Ssam 6309120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6310105197Ssam 6311105197Ssam /* 6312105197Ssam * check whether existing or not. 6313105197Ssam * check all type of SA, because there is a potential that 6314105197Ssam * one socket is registered to multiple type of SA. 6315105197Ssam */ 6316120585Ssam REGTREE_LOCK(); 6317105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6318181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6319119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6320105197Ssam LIST_REMOVE(reg, chain); 6321119643Ssam free(reg, M_IPSEC_SAR); 6322105197Ssam break; 6323105197Ssam } 6324105197Ssam } 6325105197Ssam } 6326120585Ssam REGTREE_UNLOCK(); 6327105197Ssam} 6328105197Ssam 6329105197Ssam/* 6330105197Ssam * SADB_EXPIRE processing 6331105197Ssam * send 6332105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6333105197Ssam * to KMD by PF_KEY. 6334105197Ssam * NOTE: We send only soft lifetime extension. 6335105197Ssam * 6336105197Ssam * OUT: 0 : succeed 6337105197Ssam * others : error number 6338105197Ssam */ 6339105197Ssamstatic int 6340119643Ssamkey_expire(struct secasvar *sav) 6341105197Ssam{ 6342105197Ssam int s; 6343105197Ssam int satype; 6344105197Ssam struct mbuf *result = NULL, *m; 6345105197Ssam int len; 6346105197Ssam int error = -1; 6347105197Ssam struct sadb_lifetime *lt; 6348105197Ssam 6349105197Ssam /* XXX: Why do we lock ? */ 6350105197Ssam s = splnet(); /*called from softclock()*/ 6351105197Ssam 6352120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6353120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6354105197Ssam 6355105197Ssam /* set msg header */ 6356120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6357120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6358105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6359105197Ssam if (!m) { 6360105197Ssam error = ENOBUFS; 6361105197Ssam goto fail; 6362105197Ssam } 6363105197Ssam result = m; 6364105197Ssam 6365105197Ssam /* create SA extension */ 6366105197Ssam m = key_setsadbsa(sav); 6367105197Ssam if (!m) { 6368105197Ssam error = ENOBUFS; 6369105197Ssam goto fail; 6370105197Ssam } 6371105197Ssam m_cat(result, m); 6372105197Ssam 6373105197Ssam /* create SA extension */ 6374105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6375105197Ssam sav->replay ? sav->replay->count : 0, 6376105197Ssam sav->sah->saidx.reqid); 6377105197Ssam if (!m) { 6378105197Ssam error = ENOBUFS; 6379105197Ssam goto fail; 6380105197Ssam } 6381105197Ssam m_cat(result, m); 6382105197Ssam 6383105197Ssam /* create lifetime extension (current and soft) */ 6384105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6385105197Ssam m = key_alloc_mbuf(len); 6386105197Ssam if (!m || m->m_next) { /*XXX*/ 6387105197Ssam if (m) 6388105197Ssam m_freem(m); 6389105197Ssam error = ENOBUFS; 6390105197Ssam goto fail; 6391105197Ssam } 6392105197Ssam bzero(mtod(m, caddr_t), len); 6393105197Ssam lt = mtod(m, struct sadb_lifetime *); 6394105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6395105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6396157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6397157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6398157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6399157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6400105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6401176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6402176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6403176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6404176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6405176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6406176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6407105197Ssam m_cat(result, m); 6408105197Ssam 6409105197Ssam /* set sadb_address for source */ 6410105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6411105197Ssam &sav->sah->saidx.src.sa, 6412105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6413105197Ssam if (!m) { 6414105197Ssam error = ENOBUFS; 6415105197Ssam goto fail; 6416105197Ssam } 6417105197Ssam m_cat(result, m); 6418105197Ssam 6419105197Ssam /* set sadb_address for destination */ 6420105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6421105197Ssam &sav->sah->saidx.dst.sa, 6422105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6423105197Ssam if (!m) { 6424105197Ssam error = ENOBUFS; 6425105197Ssam goto fail; 6426105197Ssam } 6427105197Ssam m_cat(result, m); 6428105197Ssam 6429105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6430105197Ssam error = EINVAL; 6431105197Ssam goto fail; 6432105197Ssam } 6433105197Ssam 6434105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6435105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6436105197Ssam if (result == NULL) { 6437105197Ssam error = ENOBUFS; 6438105197Ssam goto fail; 6439105197Ssam } 6440105197Ssam } 6441105197Ssam 6442105197Ssam result->m_pkthdr.len = 0; 6443105197Ssam for (m = result; m; m = m->m_next) 6444105197Ssam result->m_pkthdr.len += m->m_len; 6445105197Ssam 6446105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6447105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6448105197Ssam 6449105197Ssam splx(s); 6450105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6451105197Ssam 6452105197Ssam fail: 6453105197Ssam if (result) 6454105197Ssam m_freem(result); 6455105197Ssam splx(s); 6456105197Ssam return error; 6457105197Ssam} 6458105197Ssam 6459105197Ssam/* 6460105197Ssam * SADB_FLUSH processing 6461105197Ssam * receive 6462105197Ssam * <base> 6463105197Ssam * from the ikmpd, and free all entries in secastree. 6464105197Ssam * and send, 6465105197Ssam * <base> 6466105197Ssam * to the ikmpd. 6467105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 6468105197Ssam * 6469105197Ssam * m will always be freed. 6470105197Ssam */ 6471105197Ssamstatic int 6472105197Ssamkey_flush(so, m, mhp) 6473105197Ssam struct socket *so; 6474105197Ssam struct mbuf *m; 6475105197Ssam const struct sadb_msghdr *mhp; 6476105197Ssam{ 6477183550Szec INIT_VNET_IPSEC(curvnet); 6478105197Ssam struct sadb_msg *newmsg; 6479105197Ssam struct secashead *sah, *nextsah; 6480105197Ssam struct secasvar *sav, *nextsav; 6481105197Ssam u_int16_t proto; 6482105197Ssam u_int8_t state; 6483105197Ssam u_int stateidx; 6484105197Ssam 6485120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6486120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6487120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6488105197Ssam 6489105197Ssam /* map satype to proto */ 6490105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6491120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6492120585Ssam __func__)); 6493105197Ssam return key_senderror(so, m, EINVAL); 6494105197Ssam } 6495105197Ssam 6496105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 6497120585Ssam SAHTREE_LOCK(); 6498181803Sbz for (sah = LIST_FIRST(&V_sahtree); 6499105197Ssam sah != NULL; 6500105197Ssam sah = nextsah) { 6501105197Ssam nextsah = LIST_NEXT(sah, chain); 6502105197Ssam 6503105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6504105197Ssam && proto != sah->saidx.proto) 6505105197Ssam continue; 6506105197Ssam 6507105197Ssam for (stateidx = 0; 6508185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 6509105197Ssam stateidx++) { 6510185348Szec state = saorder_state_any[stateidx]; 6511105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 6512105197Ssam sav != NULL; 6513105197Ssam sav = nextsav) { 6514105197Ssam 6515105197Ssam nextsav = LIST_NEXT(sav, chain); 6516105197Ssam 6517105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6518105197Ssam KEY_FREESAV(&sav); 6519105197Ssam } 6520105197Ssam } 6521105197Ssam 6522105197Ssam sah->state = SADB_SASTATE_DEAD; 6523105197Ssam } 6524120585Ssam SAHTREE_UNLOCK(); 6525105197Ssam 6526105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 6527105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6528120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6529105197Ssam return key_senderror(so, m, ENOBUFS); 6530105197Ssam } 6531105197Ssam 6532105197Ssam if (m->m_next) 6533105197Ssam m_freem(m->m_next); 6534105197Ssam m->m_next = NULL; 6535105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6536105197Ssam newmsg = mtod(m, struct sadb_msg *); 6537105197Ssam newmsg->sadb_msg_errno = 0; 6538105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6539105197Ssam 6540105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6541105197Ssam} 6542105197Ssam 6543105197Ssam/* 6544105197Ssam * SADB_DUMP processing 6545105197Ssam * dump all entries including status of DEAD in SAD. 6546105197Ssam * receive 6547105197Ssam * <base> 6548105197Ssam * from the ikmpd, and dump all secasvar leaves 6549105197Ssam * and send, 6550105197Ssam * <base> ..... 6551105197Ssam * to the ikmpd. 6552105197Ssam * 6553105197Ssam * m will always be freed. 6554105197Ssam */ 6555105197Ssamstatic int 6556105197Ssamkey_dump(so, m, mhp) 6557105197Ssam struct socket *so; 6558105197Ssam struct mbuf *m; 6559105197Ssam const struct sadb_msghdr *mhp; 6560105197Ssam{ 6561183550Szec INIT_VNET_IPSEC(curvnet); 6562105197Ssam struct secashead *sah; 6563105197Ssam struct secasvar *sav; 6564105197Ssam u_int16_t proto; 6565105197Ssam u_int stateidx; 6566105197Ssam u_int8_t satype; 6567105197Ssam u_int8_t state; 6568105197Ssam int cnt; 6569105197Ssam struct sadb_msg *newmsg; 6570105197Ssam struct mbuf *n; 6571105197Ssam 6572120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6573120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6574120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6575120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6576105197Ssam 6577105197Ssam /* map satype to proto */ 6578105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6579120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6580120585Ssam __func__)); 6581105197Ssam return key_senderror(so, m, EINVAL); 6582105197Ssam } 6583105197Ssam 6584105197Ssam /* count sav entries to be sent to the userland. */ 6585105197Ssam cnt = 0; 6586120585Ssam SAHTREE_LOCK(); 6587181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6588105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6589105197Ssam && proto != sah->saidx.proto) 6590105197Ssam continue; 6591105197Ssam 6592105197Ssam for (stateidx = 0; 6593185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6594105197Ssam stateidx++) { 6595185348Szec state = saorder_state_any[stateidx]; 6596105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6597105197Ssam cnt++; 6598105197Ssam } 6599105197Ssam } 6600105197Ssam } 6601105197Ssam 6602119643Ssam if (cnt == 0) { 6603120585Ssam SAHTREE_UNLOCK(); 6604105197Ssam return key_senderror(so, m, ENOENT); 6605119643Ssam } 6606105197Ssam 6607105197Ssam /* send this to the userland, one at a time. */ 6608105197Ssam newmsg = NULL; 6609181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6610105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6611105197Ssam && proto != sah->saidx.proto) 6612105197Ssam continue; 6613105197Ssam 6614105197Ssam /* map proto to satype */ 6615105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6616120585Ssam SAHTREE_UNLOCK(); 6617120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 6618120585Ssam "SAD.\n", __func__)); 6619105197Ssam return key_senderror(so, m, EINVAL); 6620105197Ssam } 6621105197Ssam 6622105197Ssam for (stateidx = 0; 6623185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6624105197Ssam stateidx++) { 6625185348Szec state = saorder_state_any[stateidx]; 6626105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6627105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 6628105197Ssam --cnt, mhp->msg->sadb_msg_pid); 6629119643Ssam if (!n) { 6630120585Ssam SAHTREE_UNLOCK(); 6631105197Ssam return key_senderror(so, m, ENOBUFS); 6632119643Ssam } 6633105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6634105197Ssam } 6635105197Ssam } 6636105197Ssam } 6637120585Ssam SAHTREE_UNLOCK(); 6638105197Ssam 6639105197Ssam m_freem(m); 6640105197Ssam return 0; 6641105197Ssam} 6642105197Ssam 6643105197Ssam/* 6644105197Ssam * SADB_X_PROMISC processing 6645105197Ssam * 6646105197Ssam * m will always be freed. 6647105197Ssam */ 6648105197Ssamstatic int 6649105197Ssamkey_promisc(so, m, mhp) 6650105197Ssam struct socket *so; 6651105197Ssam struct mbuf *m; 6652105197Ssam const struct sadb_msghdr *mhp; 6653105197Ssam{ 6654105197Ssam int olen; 6655105197Ssam 6656120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6657120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6658120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6659120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6660105197Ssam 6661105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6662105197Ssam 6663105197Ssam if (olen < sizeof(struct sadb_msg)) { 6664105197Ssam#if 1 6665105197Ssam return key_senderror(so, m, EINVAL); 6666105197Ssam#else 6667105197Ssam m_freem(m); 6668105197Ssam return 0; 6669105197Ssam#endif 6670105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 6671105197Ssam /* enable/disable promisc mode */ 6672105197Ssam struct keycb *kp; 6673105197Ssam 6674105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6675105197Ssam return key_senderror(so, m, EINVAL); 6676105197Ssam mhp->msg->sadb_msg_errno = 0; 6677105197Ssam switch (mhp->msg->sadb_msg_satype) { 6678105197Ssam case 0: 6679105197Ssam case 1: 6680105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 6681105197Ssam break; 6682105197Ssam default: 6683105197Ssam return key_senderror(so, m, EINVAL); 6684105197Ssam } 6685105197Ssam 6686105197Ssam /* send the original message back to everyone */ 6687105197Ssam mhp->msg->sadb_msg_errno = 0; 6688105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6689105197Ssam } else { 6690105197Ssam /* send packet as is */ 6691105197Ssam 6692105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6693105197Ssam 6694105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6695105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6696105197Ssam } 6697105197Ssam} 6698105197Ssam 6699105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6700105197Ssam const struct sadb_msghdr *)) = { 6701105197Ssam NULL, /* SADB_RESERVED */ 6702105197Ssam key_getspi, /* SADB_GETSPI */ 6703105197Ssam key_update, /* SADB_UPDATE */ 6704105197Ssam key_add, /* SADB_ADD */ 6705105197Ssam key_delete, /* SADB_DELETE */ 6706105197Ssam key_get, /* SADB_GET */ 6707105197Ssam key_acquire2, /* SADB_ACQUIRE */ 6708105197Ssam key_register, /* SADB_REGISTER */ 6709105197Ssam NULL, /* SADB_EXPIRE */ 6710105197Ssam key_flush, /* SADB_FLUSH */ 6711105197Ssam key_dump, /* SADB_DUMP */ 6712105197Ssam key_promisc, /* SADB_X_PROMISC */ 6713105197Ssam NULL, /* SADB_X_PCHANGE */ 6714105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 6715105197Ssam key_spdadd, /* SADB_X_SPDADD */ 6716105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 6717105197Ssam key_spdget, /* SADB_X_SPDGET */ 6718105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 6719105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 6720105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 6721105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 6722105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 6723105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 6724105197Ssam}; 6725105197Ssam 6726105197Ssam/* 6727105197Ssam * parse sadb_msg buffer to process PFKEYv2, 6728105197Ssam * and create a data to response if needed. 6729105197Ssam * I think to be dealed with mbuf directly. 6730105197Ssam * IN: 6731105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 6732105197Ssam * This is rewrited to response. 6733105197Ssam * so : pointer to socket. 6734105197Ssam * OUT: 6735105197Ssam * length for buffer to send to user process. 6736105197Ssam */ 6737105197Ssamint 6738105197Ssamkey_parse(m, so) 6739105197Ssam struct mbuf *m; 6740105197Ssam struct socket *so; 6741105197Ssam{ 6742183550Szec INIT_VNET_IPSEC(curvnet); 6743105197Ssam struct sadb_msg *msg; 6744105197Ssam struct sadb_msghdr mh; 6745105197Ssam u_int orglen; 6746105197Ssam int error; 6747105197Ssam int target; 6748105197Ssam 6749120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6750120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6751105197Ssam 6752105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6753105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 6754120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 6755105197Ssam kdebug_sadb(msg)); 6756105197Ssam#endif 6757105197Ssam 6758105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 6759105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 6760105197Ssam if (!m) 6761105197Ssam return ENOBUFS; 6762105197Ssam } 6763105197Ssam msg = mtod(m, struct sadb_msg *); 6764105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6765105197Ssam target = KEY_SENDUP_ONE; 6766105197Ssam 6767105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 6768105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 6769120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 6770181803Sbz V_pfkeystat.out_invlen++; 6771105197Ssam error = EINVAL; 6772105197Ssam goto senderror; 6773105197Ssam } 6774105197Ssam 6775105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 6776120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 6777120585Ssam __func__, msg->sadb_msg_version)); 6778181803Sbz V_pfkeystat.out_invver++; 6779105197Ssam error = EINVAL; 6780105197Ssam goto senderror; 6781105197Ssam } 6782105197Ssam 6783105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 6784120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6785120585Ssam __func__, msg->sadb_msg_type)); 6786181803Sbz V_pfkeystat.out_invmsgtype++; 6787105197Ssam error = EINVAL; 6788105197Ssam goto senderror; 6789105197Ssam } 6790105197Ssam 6791105197Ssam /* for old-fashioned code - should be nuked */ 6792105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 6793105197Ssam m_freem(m); 6794105197Ssam return ENOBUFS; 6795105197Ssam } 6796105197Ssam if (m->m_next) { 6797105197Ssam struct mbuf *n; 6798105197Ssam 6799111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6800105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 6801111119Simp MCLGET(n, M_DONTWAIT); 6802105197Ssam if ((n->m_flags & M_EXT) == 0) { 6803105197Ssam m_free(n); 6804105197Ssam n = NULL; 6805105197Ssam } 6806105197Ssam } 6807105197Ssam if (!n) { 6808105197Ssam m_freem(m); 6809105197Ssam return ENOBUFS; 6810105197Ssam } 6811105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 6812105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 6813105197Ssam n->m_next = NULL; 6814105197Ssam m_freem(m); 6815105197Ssam m = n; 6816105197Ssam } 6817105197Ssam 6818105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 6819105197Ssam error = key_align(m, &mh); 6820105197Ssam if (error) 6821105197Ssam return error; 6822105197Ssam 6823105197Ssam msg = mh.msg; 6824105197Ssam 6825105197Ssam /* check SA type */ 6826105197Ssam switch (msg->sadb_msg_satype) { 6827105197Ssam case SADB_SATYPE_UNSPEC: 6828105197Ssam switch (msg->sadb_msg_type) { 6829105197Ssam case SADB_GETSPI: 6830105197Ssam case SADB_UPDATE: 6831105197Ssam case SADB_ADD: 6832105197Ssam case SADB_DELETE: 6833105197Ssam case SADB_GET: 6834105197Ssam case SADB_ACQUIRE: 6835105197Ssam case SADB_EXPIRE: 6836120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 6837120585Ssam "when msg type=%u.\n", __func__, 6838120585Ssam msg->sadb_msg_type)); 6839181803Sbz V_pfkeystat.out_invsatype++; 6840105197Ssam error = EINVAL; 6841105197Ssam goto senderror; 6842105197Ssam } 6843105197Ssam break; 6844105197Ssam case SADB_SATYPE_AH: 6845105197Ssam case SADB_SATYPE_ESP: 6846105197Ssam case SADB_X_SATYPE_IPCOMP: 6847125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 6848105197Ssam switch (msg->sadb_msg_type) { 6849105197Ssam case SADB_X_SPDADD: 6850105197Ssam case SADB_X_SPDDELETE: 6851105197Ssam case SADB_X_SPDGET: 6852105197Ssam case SADB_X_SPDDUMP: 6853105197Ssam case SADB_X_SPDFLUSH: 6854105197Ssam case SADB_X_SPDSETIDX: 6855105197Ssam case SADB_X_SPDUPDATE: 6856105197Ssam case SADB_X_SPDDELETE2: 6857120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 6858120585Ssam __func__, msg->sadb_msg_type)); 6859181803Sbz V_pfkeystat.out_invsatype++; 6860105197Ssam error = EINVAL; 6861105197Ssam goto senderror; 6862105197Ssam } 6863105197Ssam break; 6864105197Ssam case SADB_SATYPE_RSVP: 6865105197Ssam case SADB_SATYPE_OSPFV2: 6866105197Ssam case SADB_SATYPE_RIPV2: 6867105197Ssam case SADB_SATYPE_MIP: 6868120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 6869120585Ssam __func__, msg->sadb_msg_satype)); 6870181803Sbz V_pfkeystat.out_invsatype++; 6871105197Ssam error = EOPNOTSUPP; 6872105197Ssam goto senderror; 6873105197Ssam case 1: /* XXX: What does it do? */ 6874105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 6875105197Ssam break; 6876105197Ssam /*FALLTHROUGH*/ 6877105197Ssam default: 6878120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6879120585Ssam __func__, msg->sadb_msg_satype)); 6880181803Sbz V_pfkeystat.out_invsatype++; 6881105197Ssam error = EINVAL; 6882105197Ssam goto senderror; 6883105197Ssam } 6884105197Ssam 6885105197Ssam /* check field of upper layer protocol and address family */ 6886105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 6887105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 6888105197Ssam struct sadb_address *src0, *dst0; 6889105197Ssam u_int plen; 6890105197Ssam 6891105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 6892105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 6893105197Ssam 6894105197Ssam /* check upper layer protocol */ 6895105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 6896120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 6897120585Ssam "mismatched.\n", __func__)); 6898181803Sbz V_pfkeystat.out_invaddr++; 6899105197Ssam error = EINVAL; 6900105197Ssam goto senderror; 6901105197Ssam } 6902105197Ssam 6903105197Ssam /* check family */ 6904105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 6905105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 6906120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 6907120585Ssam __func__)); 6908181803Sbz V_pfkeystat.out_invaddr++; 6909105197Ssam error = EINVAL; 6910105197Ssam goto senderror; 6911105197Ssam } 6912105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6913105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 6914120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 6915120585Ssam "mismatched.\n", __func__)); 6916181803Sbz V_pfkeystat.out_invaddr++; 6917105197Ssam error = EINVAL; 6918105197Ssam goto senderror; 6919105197Ssam } 6920105197Ssam 6921105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6922105197Ssam case AF_INET: 6923105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6924105197Ssam sizeof(struct sockaddr_in)) { 6925181803Sbz V_pfkeystat.out_invaddr++; 6926105197Ssam error = EINVAL; 6927105197Ssam goto senderror; 6928105197Ssam } 6929105197Ssam break; 6930105197Ssam case AF_INET6: 6931105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6932105197Ssam sizeof(struct sockaddr_in6)) { 6933181803Sbz V_pfkeystat.out_invaddr++; 6934105197Ssam error = EINVAL; 6935105197Ssam goto senderror; 6936105197Ssam } 6937105197Ssam break; 6938105197Ssam default: 6939120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 6940120585Ssam __func__)); 6941181803Sbz V_pfkeystat.out_invaddr++; 6942105197Ssam error = EAFNOSUPPORT; 6943105197Ssam goto senderror; 6944105197Ssam } 6945105197Ssam 6946105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6947105197Ssam case AF_INET: 6948105197Ssam plen = sizeof(struct in_addr) << 3; 6949105197Ssam break; 6950105197Ssam case AF_INET6: 6951105197Ssam plen = sizeof(struct in6_addr) << 3; 6952105197Ssam break; 6953105197Ssam default: 6954105197Ssam plen = 0; /*fool gcc*/ 6955105197Ssam break; 6956105197Ssam } 6957105197Ssam 6958105197Ssam /* check max prefix length */ 6959105197Ssam if (src0->sadb_address_prefixlen > plen || 6960105197Ssam dst0->sadb_address_prefixlen > plen) { 6961120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 6962120585Ssam __func__)); 6963181803Sbz V_pfkeystat.out_invaddr++; 6964105197Ssam error = EINVAL; 6965105197Ssam goto senderror; 6966105197Ssam } 6967105197Ssam 6968105197Ssam /* 6969105197Ssam * prefixlen == 0 is valid because there can be a case when 6970105197Ssam * all addresses are matched. 6971105197Ssam */ 6972105197Ssam } 6973105197Ssam 6974105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 6975105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 6976181803Sbz V_pfkeystat.out_invmsgtype++; 6977105197Ssam error = EINVAL; 6978105197Ssam goto senderror; 6979105197Ssam } 6980105197Ssam 6981105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 6982105197Ssam 6983105197Ssamsenderror: 6984105197Ssam msg->sadb_msg_errno = error; 6985105197Ssam return key_sendup_mbuf(so, m, target); 6986105197Ssam} 6987105197Ssam 6988105197Ssamstatic int 6989105197Ssamkey_senderror(so, m, code) 6990105197Ssam struct socket *so; 6991105197Ssam struct mbuf *m; 6992105197Ssam int code; 6993105197Ssam{ 6994105197Ssam struct sadb_msg *msg; 6995105197Ssam 6996120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 6997120585Ssam ("mbuf too small, len %u", m->m_len)); 6998105197Ssam 6999105197Ssam msg = mtod(m, struct sadb_msg *); 7000105197Ssam msg->sadb_msg_errno = code; 7001105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7002105197Ssam} 7003105197Ssam 7004105197Ssam/* 7005105197Ssam * set the pointer to each header into message buffer. 7006105197Ssam * m will be freed on error. 7007105197Ssam * XXX larger-than-MCLBYTES extension? 7008105197Ssam */ 7009105197Ssamstatic int 7010105197Ssamkey_align(m, mhp) 7011105197Ssam struct mbuf *m; 7012105197Ssam struct sadb_msghdr *mhp; 7013105197Ssam{ 7014183550Szec INIT_VNET_IPSEC(curvnet); 7015105197Ssam struct mbuf *n; 7016105197Ssam struct sadb_ext *ext; 7017105197Ssam size_t off, end; 7018105197Ssam int extlen; 7019105197Ssam int toff; 7020105197Ssam 7021120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7022120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7023120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7024120585Ssam ("mbuf too small, len %u", m->m_len)); 7025105197Ssam 7026105197Ssam /* initialize */ 7027105197Ssam bzero(mhp, sizeof(*mhp)); 7028105197Ssam 7029105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7030105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7031105197Ssam 7032105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7033105197Ssam extlen = end; /*just in case extlen is not updated*/ 7034105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7035105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7036105197Ssam if (!n) { 7037105197Ssam /* m is already freed */ 7038105197Ssam return ENOBUFS; 7039105197Ssam } 7040105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7041105197Ssam 7042105197Ssam /* set pointer */ 7043105197Ssam switch (ext->sadb_ext_type) { 7044105197Ssam case SADB_EXT_SA: 7045105197Ssam case SADB_EXT_ADDRESS_SRC: 7046105197Ssam case SADB_EXT_ADDRESS_DST: 7047105197Ssam case SADB_EXT_ADDRESS_PROXY: 7048105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7049105197Ssam case SADB_EXT_LIFETIME_HARD: 7050105197Ssam case SADB_EXT_LIFETIME_SOFT: 7051105197Ssam case SADB_EXT_KEY_AUTH: 7052105197Ssam case SADB_EXT_KEY_ENCRYPT: 7053105197Ssam case SADB_EXT_IDENTITY_SRC: 7054105197Ssam case SADB_EXT_IDENTITY_DST: 7055105197Ssam case SADB_EXT_SENSITIVITY: 7056105197Ssam case SADB_EXT_PROPOSAL: 7057105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7058105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7059105197Ssam case SADB_EXT_SPIRANGE: 7060105197Ssam case SADB_X_EXT_POLICY: 7061105197Ssam case SADB_X_EXT_SA2: 7062105197Ssam /* duplicate check */ 7063105197Ssam /* 7064105197Ssam * XXX Are there duplication payloads of either 7065105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7066105197Ssam */ 7067105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7068120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7069120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7070105197Ssam m_freem(m); 7071181803Sbz V_pfkeystat.out_dupext++; 7072105197Ssam return EINVAL; 7073105197Ssam } 7074105197Ssam break; 7075105197Ssam default: 7076120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7077120585Ssam __func__, ext->sadb_ext_type)); 7078105197Ssam m_freem(m); 7079181803Sbz V_pfkeystat.out_invexttype++; 7080105197Ssam return EINVAL; 7081105197Ssam } 7082105197Ssam 7083105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7084105197Ssam 7085105197Ssam if (key_validate_ext(ext, extlen)) { 7086105197Ssam m_freem(m); 7087181803Sbz V_pfkeystat.out_invlen++; 7088105197Ssam return EINVAL; 7089105197Ssam } 7090105197Ssam 7091105197Ssam n = m_pulldown(m, off, extlen, &toff); 7092105197Ssam if (!n) { 7093105197Ssam /* m is already freed */ 7094105197Ssam return ENOBUFS; 7095105197Ssam } 7096105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7097105197Ssam 7098105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7099105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7100105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7101105197Ssam } 7102105197Ssam 7103105197Ssam if (off != end) { 7104105197Ssam m_freem(m); 7105181803Sbz V_pfkeystat.out_invlen++; 7106105197Ssam return EINVAL; 7107105197Ssam } 7108105197Ssam 7109105197Ssam return 0; 7110105197Ssam} 7111105197Ssam 7112105197Ssamstatic int 7113105197Ssamkey_validate_ext(ext, len) 7114105197Ssam const struct sadb_ext *ext; 7115105197Ssam int len; 7116105197Ssam{ 7117105197Ssam const struct sockaddr *sa; 7118105197Ssam enum { NONE, ADDR } checktype = NONE; 7119105197Ssam int baselen = 0; 7120105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7121105197Ssam 7122105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7123105197Ssam return EINVAL; 7124105197Ssam 7125105197Ssam /* if it does not match minimum/maximum length, bail */ 7126105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7127105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7128105197Ssam return EINVAL; 7129105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7130105197Ssam return EINVAL; 7131105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7132105197Ssam return EINVAL; 7133105197Ssam 7134105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7135105197Ssam switch (ext->sadb_ext_type) { 7136105197Ssam case SADB_EXT_ADDRESS_SRC: 7137105197Ssam case SADB_EXT_ADDRESS_DST: 7138105197Ssam case SADB_EXT_ADDRESS_PROXY: 7139105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7140105197Ssam checktype = ADDR; 7141105197Ssam break; 7142105197Ssam case SADB_EXT_IDENTITY_SRC: 7143105197Ssam case SADB_EXT_IDENTITY_DST: 7144105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7145105197Ssam SADB_X_IDENTTYPE_ADDR) { 7146105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7147105197Ssam checktype = ADDR; 7148105197Ssam } else 7149105197Ssam checktype = NONE; 7150105197Ssam break; 7151105197Ssam default: 7152105197Ssam checktype = NONE; 7153105197Ssam break; 7154105197Ssam } 7155105197Ssam 7156105197Ssam switch (checktype) { 7157105197Ssam case NONE: 7158105197Ssam break; 7159105197Ssam case ADDR: 7160105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7161105197Ssam if (len < baselen + sal) 7162105197Ssam return EINVAL; 7163105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7164105197Ssam return EINVAL; 7165105197Ssam break; 7166105197Ssam } 7167105197Ssam 7168105197Ssam return 0; 7169105197Ssam} 7170105197Ssam 7171105197Ssamvoid 7172180086Sjuliankey_init(void) 7173105197Ssam{ 7174183550Szec INIT_VNET_IPSEC(curvnet); 7175105197Ssam int i; 7176105197Ssam 7177185088Szec V_key_debug_level = 0; 7178185088Szec V_key_spi_trycnt = 1000; 7179185088Szec V_key_spi_minval = 0x100; 7180185088Szec V_key_spi_maxval = 0x0fffffff; /* XXX */ 7181185088Szec V_policy_id = 0; 7182185088Szec V_key_int_random = 60; /*interval to initialize randseed,1(m)*/ 7183185088Szec V_key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 7184185088Szec V_key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 7185185088Szec V_key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 7186185088Szec V_key_preferred_oldsa = 1; /* preferred old sa rather than new sa*/ 7187185088Szec 7188185088Szec V_acq_seq = 0; 7189185088Szec 7190185088Szec V_ipsec_esp_keymin = 256; 7191185088Szec V_ipsec_esp_auth = 0; 7192185088Szec V_ipsec_ah_keymin = 128; 7193185088Szec 7194119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7195181803Sbz LIST_INIT(&V_sptree[i]); 7196105197Ssam 7197181803Sbz LIST_INIT(&V_sahtree); 7198105197Ssam 7199119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7200181803Sbz LIST_INIT(&V_regtree[i]); 7201105197Ssam 7202181803Sbz LIST_INIT(&V_acqtree); 7203181803Sbz LIST_INIT(&V_spacqtree); 7204105197Ssam 7205105197Ssam /* system default */ 7206181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7207181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7208105197Ssam 7209190787Szec if (!IS_DEFAULT_VNET(curvnet)) 7210190787Szec return; 7211190787Szec 7212190787Szec SPTREE_LOCK_INIT(); 7213190787Szec REGTREE_LOCK_INIT(); 7214190787Szec SAHTREE_LOCK_INIT(); 7215190787Szec ACQ_LOCK_INIT(); 7216190787Szec SPACQ_LOCK_INIT(); 7217190787Szec 7218105197Ssam#ifndef IPSEC_DEBUG2 7219105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7220105197Ssam#endif /*IPSEC_DEBUG2*/ 7221105197Ssam 7222105197Ssam /* initialize key statistics */ 7223105197Ssam keystat.getspi_count = 1; 7224105197Ssam 7225177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7226193731Szec} 7227105197Ssam 7228193731Szec#ifdef VIMAGE 7229193731Szecvoid 7230193731Szeckey_destroy(void) 7231193731Szec{ 7232193731Szec INIT_VNET_IPSEC(curvnet); 7233193731Szec struct secpolicy *sp, *nextsp; 7234193731Szec struct secspacq *acq, *nextacq; 7235193731Szec struct secashead *sah, *nextsah; 7236193731Szec struct secreg *reg; 7237193731Szec int i; 7238193731Szec 7239193731Szec SPTREE_LOCK(); 7240193731Szec for (i = 0; i < IPSEC_DIR_MAX; i++) { 7241193731Szec for (sp = LIST_FIRST(&V_sptree[i]); 7242193731Szec sp != NULL; sp = nextsp) { 7243193731Szec nextsp = LIST_NEXT(sp, chain); 7244193731Szec if (__LIST_CHAINED(sp)) { 7245193731Szec LIST_REMOVE(sp, chain); 7246193731Szec free(sp, M_IPSEC_SP); 7247193731Szec } 7248193731Szec } 7249193731Szec } 7250193731Szec SPTREE_UNLOCK(); 7251193731Szec 7252193731Szec SAHTREE_LOCK(); 7253193731Szec for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7254193731Szec nextsah = LIST_NEXT(sah, chain); 7255193731Szec if (__LIST_CHAINED(sah)) { 7256193731Szec LIST_REMOVE(sah, chain); 7257193731Szec free(sah, M_IPSEC_SAH); 7258193731Szec } 7259193731Szec } 7260193731Szec SAHTREE_UNLOCK(); 7261193731Szec 7262193731Szec REGTREE_LOCK(); 7263193731Szec for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7264193731Szec LIST_FOREACH(reg, &V_regtree[i], chain) { 7265193731Szec if (__LIST_CHAINED(reg)) { 7266193731Szec LIST_REMOVE(reg, chain); 7267193731Szec free(reg, M_IPSEC_SAR); 7268193731Szec break; 7269193731Szec } 7270193731Szec } 7271193731Szec } 7272193731Szec REGTREE_UNLOCK(); 7273193731Szec 7274193731Szec ACQ_LOCK(); 7275193731Szec for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7276193731Szec nextacq = LIST_NEXT(acq, chain); 7277193731Szec if (__LIST_CHAINED(acq)) { 7278193731Szec LIST_REMOVE(acq, chain); 7279193731Szec free(acq, M_IPSEC_SAQ); 7280193731Szec } 7281193731Szec } 7282193731Szec ACQ_UNLOCK(); 7283193731Szec 7284193731Szec SPACQ_LOCK(); 7285193731Szec for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7286193731Szec nextacq = LIST_NEXT(acq, chain); 7287193731Szec if (__LIST_CHAINED(acq)) { 7288193731Szec LIST_REMOVE(acq, chain); 7289193731Szec free(acq, M_IPSEC_SAQ); 7290193731Szec } 7291193731Szec } 7292193731Szec SPACQ_UNLOCK(); 7293105197Ssam} 7294193731Szec#endif 7295105197Ssam 7296105197Ssam/* 7297105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7298105197Ssam * 7299105197Ssam * Special check for tunnel-mode packets. 7300105197Ssam * We must make some checks for consistency between inner and outer IP header. 7301105197Ssam * 7302105197Ssam * xxx more checks to be provided 7303105197Ssam */ 7304105197Ssamint 7305105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7306105197Ssam struct secasvar *sav; 7307105197Ssam u_int family; 7308105197Ssam caddr_t src; 7309105197Ssam caddr_t dst; 7310105197Ssam{ 7311120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7312105197Ssam 7313105197Ssam /* XXX: check inner IP header */ 7314105197Ssam 7315105197Ssam return 1; 7316105197Ssam} 7317105197Ssam 7318105197Ssam/* record data transfer on SA, and update timestamps */ 7319105197Ssamvoid 7320105197Ssamkey_sa_recordxfer(sav, m) 7321105197Ssam struct secasvar *sav; 7322105197Ssam struct mbuf *m; 7323105197Ssam{ 7324120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7325120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7326105197Ssam if (!sav->lft_c) 7327105197Ssam return; 7328105197Ssam 7329105197Ssam /* 7330105197Ssam * XXX Currently, there is a difference of bytes size 7331105197Ssam * between inbound and outbound processing. 7332105197Ssam */ 7333157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7334105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7335105197Ssam 7336105197Ssam /* 7337105197Ssam * We use the number of packets as the unit of 7338157123Sgnn * allocations. We increment the variable 7339105197Ssam * whenever {esp,ah}_{in,out}put is called. 7340105197Ssam */ 7341157123Sgnn sav->lft_c->allocations++; 7342105197Ssam /* XXX check for expires? */ 7343105197Ssam 7344105197Ssam /* 7345157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7346105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7347157123Sgnn * difference (again in seconds) from usetime. 7348105197Ssam * 7349105197Ssam * usetime 7350105197Ssam * v expire expire 7351105197Ssam * -----+-----+--------+---> t 7352105197Ssam * <--------------> HARD 7353105197Ssam * <-----> SOFT 7354105197Ssam */ 7355157123Sgnn sav->lft_c->usetime = time_second; 7356105197Ssam /* XXX check for expires? */ 7357105197Ssam 7358105197Ssam return; 7359105197Ssam} 7360105197Ssam 7361105197Ssam/* dumb version */ 7362105197Ssamvoid 7363105197Ssamkey_sa_routechange(dst) 7364105197Ssam struct sockaddr *dst; 7365105197Ssam{ 7366183550Szec INIT_VNET_IPSEC(curvnet); 7367105197Ssam struct secashead *sah; 7368105197Ssam struct route *ro; 7369105197Ssam 7370120585Ssam SAHTREE_LOCK(); 7371181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7372105197Ssam ro = &sah->sa_route; 7373105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7374105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7375105197Ssam RTFREE(ro->ro_rt); 7376105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7377105197Ssam } 7378105197Ssam } 7379120585Ssam SAHTREE_UNLOCK(); 7380105197Ssam} 7381105197Ssam 7382105197Ssamstatic void 7383189004Srdivackykey_sa_chgstate(struct secasvar *sav, u_int8_t state) 7384105197Ssam{ 7385120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7386120585Ssam SAHTREE_LOCK_ASSERT(); 7387105197Ssam 7388119643Ssam if (sav->state != state) { 7389119643Ssam if (__LIST_CHAINED(sav)) 7390119643Ssam LIST_REMOVE(sav, chain); 7391119643Ssam sav->state = state; 7392119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7393119643Ssam } 7394105197Ssam} 7395105197Ssam 7396105197Ssamvoid 7397105197Ssamkey_sa_stir_iv(sav) 7398105197Ssam struct secasvar *sav; 7399105197Ssam{ 7400105197Ssam 7401120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7402105197Ssam key_randomfill(sav->iv, sav->ivlen); 7403105197Ssam} 7404105197Ssam 7405105197Ssam/* XXX too much? */ 7406105197Ssamstatic struct mbuf * 7407105197Ssamkey_alloc_mbuf(l) 7408105197Ssam int l; 7409105197Ssam{ 7410105197Ssam struct mbuf *m = NULL, *n; 7411105197Ssam int len, t; 7412105197Ssam 7413105197Ssam len = l; 7414105197Ssam while (len > 0) { 7415111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7416105197Ssam if (n && len > MLEN) 7417111119Simp MCLGET(n, M_DONTWAIT); 7418105197Ssam if (!n) { 7419105197Ssam m_freem(m); 7420105197Ssam return NULL; 7421105197Ssam } 7422105197Ssam 7423105197Ssam n->m_next = NULL; 7424105197Ssam n->m_len = 0; 7425105197Ssam n->m_len = M_TRAILINGSPACE(n); 7426105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7427105197Ssam if (n->m_len > len) { 7428105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7429105197Ssam n->m_data += t; 7430105197Ssam n->m_len = len; 7431105197Ssam } 7432105197Ssam 7433105197Ssam len -= n->m_len; 7434105197Ssam 7435105197Ssam if (m) 7436105197Ssam m_cat(m, n); 7437105197Ssam else 7438105197Ssam m = n; 7439105197Ssam } 7440105197Ssam 7441105197Ssam return m; 7442105197Ssam} 7443157123Sgnn 7444157123Sgnn/* 7445157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 7446157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 7447157123Sgnn * application in user land. 7448157123Sgnn * 7449157123Sgnn * IN: 7450157123Sgnn * src: A pointer to a kernel security key. 7451157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 7452157123Sgnn * OUT: 7453157123Sgnn * a valid mbuf or NULL indicating an error 7454157123Sgnn * 7455157123Sgnn */ 7456157123Sgnn 7457157123Sgnnstatic struct mbuf * 7458157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 7459157123Sgnn{ 7460157123Sgnn struct mbuf *m; 7461157123Sgnn struct sadb_key *p; 7462170799Sbz int len; 7463157123Sgnn 7464157123Sgnn if (src == NULL) 7465157123Sgnn return NULL; 7466157123Sgnn 7467170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 7468157123Sgnn m = key_alloc_mbuf(len); 7469157123Sgnn if (m == NULL) 7470157123Sgnn return NULL; 7471157123Sgnn p = mtod(m, struct sadb_key *); 7472157123Sgnn bzero(p, len); 7473157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 7474157123Sgnn p->sadb_key_exttype = exttype; 7475157123Sgnn p->sadb_key_bits = src->bits; 7476157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 7477157123Sgnn 7478157123Sgnn return m; 7479157123Sgnn} 7480157123Sgnn 7481157123Sgnn/* 7482157123Sgnn * Take one of the kernel's lifetime data structures and convert it 7483157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 7484157123Sgnn * a waiting application in user land. 7485157123Sgnn * 7486157123Sgnn * IN: 7487157123Sgnn * src: A pointer to a kernel lifetime structure. 7488157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 7489157123Sgnn * data structures for more information. 7490157123Sgnn * OUT: 7491157123Sgnn * a valid mbuf or NULL indicating an error 7492157123Sgnn * 7493157123Sgnn */ 7494157123Sgnn 7495157123Sgnnstatic struct mbuf * 7496157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 7497157123Sgnn{ 7498157123Sgnn struct mbuf *m = NULL; 7499157123Sgnn struct sadb_lifetime *p; 7500157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 7501157123Sgnn 7502157123Sgnn if (src == NULL) 7503157123Sgnn return NULL; 7504157123Sgnn 7505157123Sgnn m = key_alloc_mbuf(len); 7506157123Sgnn if (m == NULL) 7507157123Sgnn return m; 7508157123Sgnn p = mtod(m, struct sadb_lifetime *); 7509157123Sgnn 7510157123Sgnn bzero(p, len); 7511157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 7512157123Sgnn p->sadb_lifetime_exttype = exttype; 7513157123Sgnn p->sadb_lifetime_allocations = src->allocations; 7514157123Sgnn p->sadb_lifetime_bytes = src->bytes; 7515157123Sgnn p->sadb_lifetime_addtime = src->addtime; 7516157123Sgnn p->sadb_lifetime_usetime = src->usetime; 7517157123Sgnn 7518157123Sgnn return m; 7519157123Sgnn 7520157123Sgnn} 7521