key.c revision 185348
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 185348 2008-11-26 22:32:07Z 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> 78105197Ssam#endif 79105197Ssam#ifdef INET6 80105197Ssam#include <netinet6/in6_pcb.h> 81105197Ssam#endif /* INET6 */ 82105197Ssam 83105197Ssam#include <net/pfkeyv2.h> 84105197Ssam#include <netipsec/keydb.h> 85105197Ssam#include <netipsec/key.h> 86105197Ssam#include <netipsec/keysock.h> 87105197Ssam#include <netipsec/key_debug.h> 88105197Ssam 89105197Ssam#include <netipsec/ipsec.h> 90105197Ssam#ifdef INET6 91105197Ssam#include <netipsec/ipsec6.h> 92105197Ssam#endif 93105197Ssam 94105197Ssam#include <netipsec/xform.h> 95105197Ssam 96105197Ssam#include <machine/stdarg.h> 97105197Ssam 98105197Ssam/* randomness */ 99105197Ssam#include <sys/random.h> 100181803Sbz#include <sys/vimage.h> 101105197Ssam 102105197Ssam#define FULLMASK 0xff 103105197Ssam#define _BITS(bytes) ((bytes) << 3) 104105197Ssam 105105197Ssam/* 106105197Ssam * Note on SA reference counting: 107105197Ssam * - SAs that are not in DEAD state will have (total external reference + 1) 108105197Ssam * following value in reference count field. they cannot be freed and are 109105197Ssam * referenced from SA header. 110105197Ssam * - SAs that are in DEAD state will have (total external reference) 111105197Ssam * in reference count field. they are ready to be freed. reference from 112105197Ssam * SA header will be removed in key_delsav(), when the reference count 113105197Ssam * field hits 0 (= no external reference other than from SA header. 114105197Ssam */ 115105197Ssam 116185088Szec#ifdef VIMAGE_GLOBALS 117185088Szecu_int32_t key_debug_level; 118185088Szecstatic u_int key_spi_trycnt; 119185088Szecstatic u_int32_t key_spi_minval; 120185088Szecstatic u_int32_t key_spi_maxval; 121185088Szecstatic u_int32_t policy_id; 122185088Szecstatic u_int key_int_random; 123185088Szecstatic u_int key_larval_lifetime; 124185088Szecstatic int key_blockacq_count; 125185088Szecstatic int key_blockacq_lifetime; 126185088Szecstatic int key_preferred_oldsa; 127105197Ssam 128185088Szecstatic u_int32_t acq_seq; 129105197Ssam 130185088Szecstatic int ipsec_esp_keymin; 131185088Szecstatic int ipsec_esp_auth; 132185088Szecstatic int ipsec_ah_keymin; 133185088Szec 134105197Ssamstatic LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 135185088Szecstatic LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 136185088Szecstatic LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 137185088Szecstatic LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 138185088Szecstatic LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 139185088Szec#endif /* VIMAGE_GLOBALS */ 140185088Szec 141119643Ssamstatic struct mtx sptree_lock; 142120585Ssam#define SPTREE_LOCK_INIT() \ 143120585Ssam mtx_init(&sptree_lock, "sptree", \ 144120585Ssam "fast ipsec security policy database", MTX_DEF) 145120585Ssam#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 146120585Ssam#define SPTREE_LOCK() mtx_lock(&sptree_lock) 147120585Ssam#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 148120585Ssam#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 149120585Ssam 150119643Ssamstatic struct mtx sahtree_lock; 151120585Ssam#define SAHTREE_LOCK_INIT() \ 152120585Ssam mtx_init(&sahtree_lock, "sahtree", \ 153120585Ssam "fast ipsec security association database", MTX_DEF) 154120585Ssam#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 155120585Ssam#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 156120585Ssam#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 157120585Ssam#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 158120585Ssam 159119643Ssam /* registed list */ 160119643Ssamstatic struct mtx regtree_lock; 161120585Ssam#define REGTREE_LOCK_INIT() \ 162120585Ssam mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 163120585Ssam#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 164120585Ssam#define REGTREE_LOCK() mtx_lock(®tree_lock) 165120585Ssam#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 166120585Ssam#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 167120585Ssam 168119643Ssamstatic struct mtx acq_lock; 169120585Ssam#define ACQ_LOCK_INIT() \ 170120585Ssam mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 171120585Ssam#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 172120585Ssam#define ACQ_LOCK() mtx_lock(&acq_lock) 173120585Ssam#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 174120585Ssam#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 175120585Ssam 176119643Ssamstatic struct mtx spacq_lock; 177120585Ssam#define SPACQ_LOCK_INIT() \ 178120585Ssam mtx_init(&spacq_lock, "spacqtree", \ 179120585Ssam "fast ipsec security policy acquire list", MTX_DEF) 180120585Ssam#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 181120585Ssam#define SPACQ_LOCK() mtx_lock(&spacq_lock) 182120585Ssam#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 183120585Ssam#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 184105197Ssam 185105197Ssam/* search order for SAs */ 186128856Ssamstatic const u_int saorder_state_valid_prefer_old[] = { 187105197Ssam SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 188105197Ssam}; 189128856Ssamstatic const u_int saorder_state_valid_prefer_new[] = { 190128856Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 191128856Ssam}; 192185348Szecstatic const u_int saorder_state_alive[] = { 193105197Ssam /* except DEAD */ 194105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 195105197Ssam}; 196185348Szecstatic const u_int saorder_state_any[] = { 197105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 198105197Ssam SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 199105197Ssam}; 200105197Ssam 201105197Ssamstatic const int minsize[] = { 202105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 203105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 204105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 205105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 206105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 207105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 208105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 209105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 210105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 211105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 212105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 213105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 214105197Ssam sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 215105197Ssam sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 216105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 217105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 218105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 219105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 220105197Ssam sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 221105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 222105197Ssam}; 223105197Ssamstatic const int maxsize[] = { 224105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 225105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 226105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 227105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 228105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 229105197Ssam 0, /* SADB_EXT_ADDRESS_SRC */ 230105197Ssam 0, /* SADB_EXT_ADDRESS_DST */ 231105197Ssam 0, /* SADB_EXT_ADDRESS_PROXY */ 232105197Ssam 0, /* SADB_EXT_KEY_AUTH */ 233105197Ssam 0, /* SADB_EXT_KEY_ENCRYPT */ 234105197Ssam 0, /* SADB_EXT_IDENTITY_SRC */ 235105197Ssam 0, /* SADB_EXT_IDENTITY_DST */ 236105197Ssam 0, /* SADB_EXT_SENSITIVITY */ 237105197Ssam 0, /* SADB_EXT_PROPOSAL */ 238105197Ssam 0, /* SADB_EXT_SUPPORTED_AUTH */ 239105197Ssam 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 240105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 241105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 242105197Ssam 0, /* SADB_X_EXT_POLICY */ 243105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 244105197Ssam}; 245105197Ssam 246105197Ssam#ifdef SYSCTL_DECL 247105197SsamSYSCTL_DECL(_net_key); 248105197Ssam#endif 249105197Ssam 250183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_DEBUG_LEVEL, debug, 251183550Szec CTLFLAG_RW, key_debug_level, 0, ""); 252105197Ssam 253105197Ssam/* max count of trial for the decision of spi value */ 254183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_SPI_TRY, spi_trycnt, 255183550Szec CTLFLAG_RW, key_spi_trycnt, 0, ""); 256105197Ssam 257105197Ssam/* minimum spi value to allocate automatically. */ 258183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MIN_VALUE, 259183550Szec spi_minval, CTLFLAG_RW, key_spi_minval, 0, ""); 260105197Ssam 261105197Ssam/* maximun spi value to allocate automatically. */ 262183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MAX_VALUE, 263183550Szec spi_maxval, CTLFLAG_RW, key_spi_maxval, 0, ""); 264105197Ssam 265105197Ssam/* interval to initialize randseed */ 266183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_RANDOM_INT, 267183550Szec int_random, CTLFLAG_RW, key_int_random, 0, ""); 268105197Ssam 269105197Ssam/* lifetime for larval SA */ 270183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_LARVAL_LIFETIME, 271183550Szec larval_lifetime, CTLFLAG_RW, key_larval_lifetime, 0, ""); 272105197Ssam 273105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 274183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_COUNT, 275183550Szec blockacq_count, CTLFLAG_RW, key_blockacq_count, 0, ""); 276105197Ssam 277105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 278183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_LIFETIME, 279183550Szec blockacq_lifetime, CTLFLAG_RW, key_blockacq_lifetime, 0, ""); 280105197Ssam 281105197Ssam/* ESP auth */ 282183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_AUTH, esp_auth, 283183550Szec CTLFLAG_RW, ipsec_esp_auth, 0, ""); 284105197Ssam 285105197Ssam/* minimum ESP key length */ 286183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_KEYMIN, 287183550Szec esp_keymin, CTLFLAG_RW, ipsec_esp_keymin, 0, ""); 288105197Ssam 289105197Ssam/* minimum AH key length */ 290183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_AH_KEYMIN, ah_keymin, 291183550Szec CTLFLAG_RW, ipsec_ah_keymin, 0, ""); 292105197Ssam 293105197Ssam/* perfered old SA rather than new SA */ 294183550SzecSYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_PREFERED_OLDSA, 295183550Szec preferred_oldsa, CTLFLAG_RW, key_preferred_oldsa, 0, ""); 296105197Ssam 297105197Ssam#define __LIST_CHAINED(elm) \ 298105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 299105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 300105197Ssamdo {\ 301105197Ssam struct type *curelm = LIST_FIRST(head); \ 302105197Ssam if (curelm == NULL) {\ 303105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 304105197Ssam } else { \ 305105197Ssam while (LIST_NEXT(curelm, field)) \ 306105197Ssam curelm = LIST_NEXT(curelm, field);\ 307105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 308105197Ssam }\ 309105197Ssam} while (0) 310105197Ssam 311105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 312105197Ssamdo { \ 313105197Ssam if ((head) != (sav)) { \ 314105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 315105197Ssam (name), (head), (sav))); \ 316105197Ssam continue; \ 317105197Ssam } \ 318105197Ssam} while (0) 319105197Ssam 320105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 321105197Ssamdo { \ 322105197Ssam if ((head) != (sp)) { \ 323105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 324105197Ssam "anyway continue.\n", \ 325105197Ssam (name), (head), (sp))); \ 326105197Ssam } \ 327105197Ssam} while (0) 328105197Ssam 329119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 330119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 331119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 332119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 333119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 334119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 335119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 336105197Ssam 337105197Ssam/* 338105197Ssam * set parameters into secpolicyindex buffer. 339105197Ssam * Must allocate secpolicyindex buffer passed to this function. 340105197Ssam */ 341105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 342105197Ssamdo { \ 343105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 344105197Ssam (idx)->dir = (_dir); \ 345105197Ssam (idx)->prefs = (ps); \ 346105197Ssam (idx)->prefd = (pd); \ 347105197Ssam (idx)->ul_proto = (ulp); \ 348105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 349105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 350105197Ssam} while (0) 351105197Ssam 352105197Ssam/* 353105197Ssam * set parameters into secasindex buffer. 354105197Ssam * Must allocate secasindex buffer before calling this function. 355105197Ssam */ 356105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 357105197Ssamdo { \ 358105197Ssam bzero((idx), sizeof(struct secasindex)); \ 359105197Ssam (idx)->proto = (p); \ 360105197Ssam (idx)->mode = (m); \ 361105197Ssam (idx)->reqid = (r); \ 362105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 363105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 364105197Ssam} while (0) 365105197Ssam 366105197Ssam/* key statistics */ 367105197Ssamstruct _keystat { 368105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 369105197Ssam} keystat; 370105197Ssam 371105197Ssamstruct sadb_msghdr { 372105197Ssam struct sadb_msg *msg; 373105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 374105197Ssam int extoff[SADB_EXT_MAX + 1]; 375105197Ssam int extlen[SADB_EXT_MAX + 1]; 376105197Ssam}; 377105197Ssam 378105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 379105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 380105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 381105197Ssamstatic void key_delsp __P((struct secpolicy *)); 382105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 383119643Ssamstatic void _key_delsp(struct secpolicy *sp); 384105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 385105197Ssamstatic u_int32_t key_newreqid __P((void)); 386105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 387105197Ssam const struct sadb_msghdr *, int, int, ...)); 388105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 389105197Ssam const struct sadb_msghdr *)); 390105197Ssamstatic u_int32_t key_getnewspid __P((void)); 391105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 392105197Ssam const struct sadb_msghdr *)); 393105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 394105197Ssam const struct sadb_msghdr *)); 395105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 396105197Ssam const struct sadb_msghdr *)); 397105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 398105197Ssam const struct sadb_msghdr *)); 399105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 400105197Ssam const struct sadb_msghdr *)); 401105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 402105197Ssam u_int8_t, u_int32_t, u_int32_t)); 403105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 404105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 405105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 406105197Ssamstatic void key_delsah __P((struct secashead *)); 407105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 408105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 409105197Ssam const char*, int)); 410105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 411105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 412105197Ssamstatic void key_delsav __P((struct secasvar *)); 413105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 414105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 415105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 416105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 417105197Ssam const struct sadb_msghdr *)); 418105197Ssamstatic int key_mature __P((struct secasvar *)); 419105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 420105197Ssam u_int8_t, u_int32_t, u_int32_t)); 421105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 422105197Ssam u_int32_t, pid_t, u_int16_t)); 423105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 424105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 425105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 426105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 427105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 428105197Ssam u_int32_t)); 429157123Sgnnstatic struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 430157123Sgnn struct malloc_type *); 431157123Sgnnstatic struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 432157123Sgnn struct malloc_type *type); 433105197Ssam#ifdef INET6 434105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 435105197Ssam#endif 436105197Ssam 437105197Ssam/* flags for key_cmpsaidx() */ 438105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 439105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 440105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 441105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 442105197Ssamstatic int key_cmpsaidx 443105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 444105197Ssam 445105197Ssamstatic int key_cmpspidx_exactly 446105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 447105197Ssamstatic int key_cmpspidx_withmask 448105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 449105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 450105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 451105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 452105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 453105197Ssam 454105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 455105197Ssam const struct sadb_msghdr *)); 456105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 457105197Ssam struct secasindex *)); 458105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 459105197Ssam const struct sadb_msghdr *)); 460105197Ssam#ifdef IPSEC_DOSEQCHECK 461105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 462105197Ssam#endif 463105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 464105197Ssam const struct sadb_msghdr *)); 465105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 466105197Ssam const struct sadb_msghdr *)); 467105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 468105197Ssam const struct sadb_msghdr *)); 469105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 470105197Ssam const struct sadb_msghdr *)); 471105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 472105197Ssam const struct sadb_msghdr *)); 473105197Ssam 474105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 475105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 476105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 477105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 478105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 479105197Ssam 480105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 481105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 482105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 483105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 484105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 485105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 486105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 487105197Ssam const struct sadb_msghdr *)); 488105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 489105197Ssam const struct sadb_msghdr *)); 490105197Ssamstatic int key_expire __P((struct secasvar *)); 491105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 492105197Ssam const struct sadb_msghdr *)); 493105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 494105197Ssam const struct sadb_msghdr *)); 495105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 496105197Ssam const struct sadb_msghdr *)); 497105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 498105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 499105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 500157123Sgnnstatic struct mbuf *key_setlifetime(struct seclifetime *src, 501157123Sgnn u_int16_t exttype); 502157123Sgnnstatic struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 503157123Sgnn 504105197Ssam#if 0 505105197Ssamstatic const char *key_getfqdn __P((void)); 506105197Ssamstatic const char *key_getuserfqdn __P((void)); 507105197Ssam#endif 508105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 509105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 510105197Ssam 511158767Spjdstatic __inline void 512158767Spjdsa_initref(struct secasvar *sav) 513158767Spjd{ 514105197Ssam 515158767Spjd refcount_init(&sav->refcnt, 1); 516158767Spjd} 517158767Spjdstatic __inline void 518158767Spjdsa_addref(struct secasvar *sav) 519158767Spjd{ 520158767Spjd 521158767Spjd refcount_acquire(&sav->refcnt); 522158767Spjd IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 523158767Spjd} 524158767Spjdstatic __inline int 525158767Spjdsa_delref(struct secasvar *sav) 526158767Spjd{ 527158767Spjd 528158767Spjd IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 529158767Spjd return (refcount_release(&sav->refcnt)); 530158767Spjd} 531158767Spjd 532105197Ssam#define SP_ADDREF(p) do { \ 533105197Ssam (p)->refcnt++; \ 534120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 535105197Ssam} while (0) 536105197Ssam#define SP_DELREF(p) do { \ 537120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 538105197Ssam (p)->refcnt--; \ 539105197Ssam} while (0) 540135947Ssam 541105197Ssam 542105197Ssam/* 543135947Ssam * Update the refcnt while holding the SPTREE lock. 544135947Ssam */ 545135947Ssamvoid 546135947Ssamkey_addref(struct secpolicy *sp) 547135947Ssam{ 548135947Ssam SPTREE_LOCK(); 549135947Ssam SP_ADDREF(sp); 550135947Ssam SPTREE_UNLOCK(); 551135947Ssam} 552135947Ssam 553135947Ssam/* 554105197Ssam * Return 0 when there are known to be no SP's for the specified 555105197Ssam * direction. Otherwise return 1. This is used by IPsec code 556105197Ssam * to optimize performance. 557105197Ssam */ 558105197Ssamint 559105197Ssamkey_havesp(u_int dir) 560105197Ssam{ 561183550Szec INIT_VNET_IPSEC(curvnet); 562183550Szec 563105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 564181803Sbz LIST_FIRST(&V_sptree[dir]) != NULL : 1); 565105197Ssam} 566105197Ssam 567105197Ssam/* %%% IPsec policy management */ 568105197Ssam/* 569105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 570105197Ssam * Must call key_freesp() later. 571105197Ssam * OUT: NULL: not found 572105197Ssam * others: found and return the pointer. 573105197Ssam */ 574105197Ssamstruct secpolicy * 575105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 576105197Ssam{ 577183550Szec INIT_VNET_IPSEC(curvnet); 578105197Ssam struct secpolicy *sp; 579105197Ssam 580120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 581120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 582120585Ssam ("invalid direction %u", dir)); 583105197Ssam 584105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 585120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 586105197Ssam 587105197Ssam /* get a SP entry */ 588105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 589105197Ssam printf("*** objects\n"); 590105197Ssam kdebug_secpolicyindex(spidx)); 591105197Ssam 592120585Ssam SPTREE_LOCK(); 593181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 594105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 595105197Ssam printf("*** in SPD\n"); 596105197Ssam kdebug_secpolicyindex(&sp->spidx)); 597105197Ssam 598105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 599105197Ssam continue; 600105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 601105197Ssam goto found; 602105197Ssam } 603105197Ssam sp = NULL; 604105197Ssamfound: 605105197Ssam if (sp) { 606105197Ssam /* sanity check */ 607120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 608105197Ssam 609105197Ssam /* found a SPD entry */ 610105197Ssam sp->lastused = time_second; 611105197Ssam SP_ADDREF(sp); 612105197Ssam } 613120585Ssam SPTREE_UNLOCK(); 614105197Ssam 615105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 616120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 617105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 618105197Ssam return sp; 619105197Ssam} 620105197Ssam 621105197Ssam/* 622105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 623105197Ssam * Must call key_freesp() later. 624105197Ssam * OUT: NULL: not found 625105197Ssam * others: found and return the pointer. 626105197Ssam */ 627105197Ssamstruct secpolicy * 628105197Ssamkey_allocsp2(u_int32_t spi, 629105197Ssam union sockaddr_union *dst, 630105197Ssam u_int8_t proto, 631105197Ssam u_int dir, 632105197Ssam const char* where, int tag) 633105197Ssam{ 634183550Szec INIT_VNET_IPSEC(curvnet); 635105197Ssam struct secpolicy *sp; 636105197Ssam 637120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 638120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 639120585Ssam ("invalid direction %u", dir)); 640105197Ssam 641105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 642120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 643105197Ssam 644105197Ssam /* get a SP entry */ 645105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 646105197Ssam printf("*** objects\n"); 647105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 648105197Ssam kdebug_sockaddr(&dst->sa)); 649105197Ssam 650120585Ssam SPTREE_LOCK(); 651181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 652105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 653105197Ssam printf("*** in SPD\n"); 654105197Ssam kdebug_secpolicyindex(&sp->spidx)); 655105197Ssam 656105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 657105197Ssam continue; 658105197Ssam /* compare simple values, then dst address */ 659105197Ssam if (sp->spidx.ul_proto != proto) 660105197Ssam continue; 661105197Ssam /* NB: spi's must exist and match */ 662105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 663105197Ssam continue; 664105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 665105197Ssam goto found; 666105197Ssam } 667105197Ssam sp = NULL; 668105197Ssamfound: 669105197Ssam if (sp) { 670105197Ssam /* sanity check */ 671120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 672105197Ssam 673105197Ssam /* found a SPD entry */ 674105197Ssam sp->lastused = time_second; 675105197Ssam SP_ADDREF(sp); 676105197Ssam } 677120585Ssam SPTREE_UNLOCK(); 678105197Ssam 679105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 680120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 681105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 682105197Ssam return sp; 683105197Ssam} 684105197Ssam 685105197Ssam/* 686105197Ssam * return a policy that matches this particular inbound packet. 687105197Ssam * XXX slow 688105197Ssam */ 689105197Ssamstruct secpolicy * 690105197Ssamkey_gettunnel(const struct sockaddr *osrc, 691105197Ssam const struct sockaddr *odst, 692105197Ssam const struct sockaddr *isrc, 693105197Ssam const struct sockaddr *idst, 694105197Ssam const char* where, int tag) 695105197Ssam{ 696183550Szec INIT_VNET_IPSEC(curvnet); 697105197Ssam struct secpolicy *sp; 698105197Ssam const int dir = IPSEC_DIR_INBOUND; 699105197Ssam struct ipsecrequest *r1, *r2, *p; 700105197Ssam struct secpolicyindex spidx; 701105197Ssam 702105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 703120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 704105197Ssam 705105197Ssam if (isrc->sa_family != idst->sa_family) { 706120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 707120585Ssam __func__, isrc->sa_family, idst->sa_family)); 708105197Ssam sp = NULL; 709105197Ssam goto done; 710105197Ssam } 711105197Ssam 712120585Ssam SPTREE_LOCK(); 713181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 714105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 715105197Ssam continue; 716105197Ssam 717105197Ssam r1 = r2 = NULL; 718105197Ssam for (p = sp->req; p; p = p->next) { 719105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 720105197Ssam continue; 721105197Ssam 722105197Ssam r1 = r2; 723105197Ssam r2 = p; 724105197Ssam 725105197Ssam if (!r1) { 726105197Ssam /* here we look at address matches only */ 727105197Ssam spidx = sp->spidx; 728105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 729105197Ssam idst->sa_len > sizeof(spidx.dst)) 730105197Ssam continue; 731105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 732105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 733105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 734105197Ssam continue; 735105197Ssam } else { 736105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 737105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 738105197Ssam continue; 739105197Ssam } 740105197Ssam 741105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 742105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 743105197Ssam continue; 744105197Ssam 745105197Ssam goto found; 746105197Ssam } 747105197Ssam } 748105197Ssam sp = NULL; 749105197Ssamfound: 750105197Ssam if (sp) { 751105197Ssam sp->lastused = time_second; 752105197Ssam SP_ADDREF(sp); 753105197Ssam } 754120585Ssam SPTREE_UNLOCK(); 755105197Ssamdone: 756105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 757120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 758105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 759105197Ssam return sp; 760105197Ssam} 761105197Ssam 762105197Ssam/* 763105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 764105197Ssam * checking each request entries in SP, and acquire an SA if need. 765105197Ssam * OUT: 0: there are valid requests. 766105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 767105197Ssam */ 768105197Ssamint 769105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 770105197Ssam{ 771183550Szec INIT_VNET_IPSEC(curvnet); 772105197Ssam u_int level; 773105197Ssam int error; 774105197Ssam 775120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 776120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 777120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 778105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 779120585Ssam ("unexpected policy %u", saidx->mode)); 780105197Ssam 781105197Ssam /* 782105197Ssam * XXX guard against protocol callbacks from the crypto 783105197Ssam * thread as they reference ipsecrequest.sav which we 784105197Ssam * temporarily null out below. Need to rethink how we 785105197Ssam * handle bundled SA's in the callback thread. 786105197Ssam */ 787120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 788119643Ssam 789119643Ssam /* get current level */ 790119643Ssam level = ipsec_get_reqlevel(isr); 791105197Ssam#if 0 792105197Ssam /* 793105197Ssam * We do allocate new SA only if the state of SA in the holder is 794105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 795105197Ssam */ 796105197Ssam if (isr->sav != NULL) { 797105197Ssam if (isr->sav->sah == NULL) 798120585Ssam panic("%s: sah is null.\n", __func__); 799105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 800105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 801105197Ssam KEY_FREESAV(&isr->sav); 802105197Ssam isr->sav = NULL; 803105197Ssam } 804105197Ssam } 805105197Ssam#else 806105197Ssam /* 807105197Ssam * we free any SA stashed in the IPsec request because a different 808105197Ssam * SA may be involved each time this request is checked, either 809105197Ssam * because new SAs are being configured, or this request is 810105197Ssam * associated with an unconnected datagram socket, or this request 811105197Ssam * is associated with a system default policy. 812105197Ssam * 813105197Ssam * The operation may have negative impact to performance. We may 814105197Ssam * want to check cached SA carefully, rather than picking new SA 815105197Ssam * every time. 816105197Ssam */ 817105197Ssam if (isr->sav != NULL) { 818105197Ssam KEY_FREESAV(&isr->sav); 819105197Ssam isr->sav = NULL; 820105197Ssam } 821105197Ssam#endif 822105197Ssam 823105197Ssam /* 824105197Ssam * new SA allocation if no SA found. 825105197Ssam * key_allocsa_policy should allocate the oldest SA available. 826105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 827105197Ssam */ 828105197Ssam if (isr->sav == NULL) 829105197Ssam isr->sav = key_allocsa_policy(saidx); 830105197Ssam 831105197Ssam /* When there is SA. */ 832105197Ssam if (isr->sav != NULL) { 833105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 834105197Ssam isr->sav->state != SADB_SASTATE_DYING) 835105197Ssam return EINVAL; 836105197Ssam return 0; 837105197Ssam } 838105197Ssam 839105197Ssam /* there is no SA */ 840105197Ssam error = key_acquire(saidx, isr->sp); 841105197Ssam if (error != 0) { 842105197Ssam /* XXX What should I do ? */ 843120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 844120585Ssam __func__, error)); 845105197Ssam return error; 846105197Ssam } 847105197Ssam 848105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 849105197Ssam /* XXX sigh, the interface to this routine is botched */ 850120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 851105197Ssam return 0; 852105197Ssam } else { 853105197Ssam return ENOENT; 854105197Ssam } 855105197Ssam} 856105197Ssam 857105197Ssam/* 858105197Ssam * allocating a SA for policy entry from SAD. 859105197Ssam * NOTE: searching SAD of aliving state. 860105197Ssam * OUT: NULL: not found. 861105197Ssam * others: found and return the pointer. 862105197Ssam */ 863105197Ssamstatic struct secasvar * 864105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 865105197Ssam{ 866128856Ssam#define N(a) _ARRAYLEN(a) 867183550Szec INIT_VNET_IPSEC(curvnet); 868105197Ssam struct secashead *sah; 869105197Ssam struct secasvar *sav; 870128856Ssam u_int stateidx, arraysize; 871128856Ssam const u_int *state_valid; 872105197Ssam 873120585Ssam SAHTREE_LOCK(); 874181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 875105197Ssam if (sah->state == SADB_SASTATE_DEAD) 876105197Ssam continue; 877119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 878181803Sbz if (V_key_preferred_oldsa) { 879128856Ssam state_valid = saorder_state_valid_prefer_old; 880128856Ssam arraysize = N(saorder_state_valid_prefer_old); 881128856Ssam } else { 882128856Ssam state_valid = saorder_state_valid_prefer_new; 883128856Ssam arraysize = N(saorder_state_valid_prefer_new); 884128856Ssam } 885120585Ssam SAHTREE_UNLOCK(); 886105197Ssam goto found; 887119643Ssam } 888105197Ssam } 889120585Ssam SAHTREE_UNLOCK(); 890105197Ssam 891105197Ssam return NULL; 892105197Ssam 893105197Ssam found: 894105197Ssam /* search valid state */ 895128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 896128856Ssam sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 897105197Ssam if (sav != NULL) 898105197Ssam return sav; 899105197Ssam } 900105197Ssam 901105197Ssam return NULL; 902128856Ssam#undef N 903105197Ssam} 904105197Ssam 905105197Ssam/* 906105197Ssam * searching SAD with direction, protocol, mode and state. 907105197Ssam * called by key_allocsa_policy(). 908105197Ssam * OUT: 909105197Ssam * NULL : not found 910105197Ssam * others : found, pointer to a SA. 911105197Ssam */ 912105197Ssamstatic struct secasvar * 913105197Ssamkey_do_allocsa_policy(struct secashead *sah, u_int state) 914105197Ssam{ 915183550Szec INIT_VNET_IPSEC(curvnet); 916105197Ssam struct secasvar *sav, *nextsav, *candidate, *d; 917105197Ssam 918105197Ssam /* initilize */ 919105197Ssam candidate = NULL; 920105197Ssam 921120585Ssam SAHTREE_LOCK(); 922105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 923105197Ssam sav != NULL; 924105197Ssam sav = nextsav) { 925105197Ssam 926105197Ssam nextsav = LIST_NEXT(sav, chain); 927105197Ssam 928105197Ssam /* sanity check */ 929120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 930105197Ssam 931105197Ssam /* initialize */ 932105197Ssam if (candidate == NULL) { 933105197Ssam candidate = sav; 934105197Ssam continue; 935105197Ssam } 936105197Ssam 937105197Ssam /* Which SA is the better ? */ 938105197Ssam 939120585Ssam IPSEC_ASSERT(candidate->lft_c != NULL, 940120585Ssam ("null candidate lifetime")); 941120585Ssam IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 942105197Ssam 943105197Ssam /* What the best method is to compare ? */ 944181803Sbz if (V_key_preferred_oldsa) { 945157123Sgnn if (candidate->lft_c->addtime > 946157123Sgnn sav->lft_c->addtime) { 947105197Ssam candidate = sav; 948105197Ssam } 949105197Ssam continue; 950105197Ssam /*NOTREACHED*/ 951105197Ssam } 952105197Ssam 953125876Sguido /* preferred new sa rather than old sa */ 954157123Sgnn if (candidate->lft_c->addtime < 955157123Sgnn sav->lft_c->addtime) { 956105197Ssam d = candidate; 957105197Ssam candidate = sav; 958105197Ssam } else 959105197Ssam d = sav; 960105197Ssam 961105197Ssam /* 962105197Ssam * prepared to delete the SA when there is more 963105197Ssam * suitable candidate and the lifetime of the SA is not 964105197Ssam * permanent. 965105197Ssam */ 966177553Sbz if (d->lft_h->addtime != 0) { 967105197Ssam struct mbuf *m, *result; 968125508Ssam u_int8_t satype; 969105197Ssam 970105197Ssam key_sa_chgstate(d, SADB_SASTATE_DEAD); 971105197Ssam 972120585Ssam IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 973125508Ssam 974125508Ssam satype = key_proto2satype(d->sah->saidx.proto); 975125508Ssam if (satype == 0) 976125508Ssam goto msgfail; 977125508Ssam 978105197Ssam m = key_setsadbmsg(SADB_DELETE, 0, 979125508Ssam satype, 0, 0, d->refcnt - 1); 980105197Ssam if (!m) 981105197Ssam goto msgfail; 982105197Ssam result = m; 983105197Ssam 984105197Ssam /* set sadb_address for saidx's. */ 985105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 986105197Ssam &d->sah->saidx.src.sa, 987105197Ssam d->sah->saidx.src.sa.sa_len << 3, 988105197Ssam IPSEC_ULPROTO_ANY); 989105197Ssam if (!m) 990105197Ssam goto msgfail; 991105197Ssam m_cat(result, m); 992105197Ssam 993105197Ssam /* set sadb_address for saidx's. */ 994105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 995128860Ssam &d->sah->saidx.dst.sa, 996128860Ssam d->sah->saidx.dst.sa.sa_len << 3, 997105197Ssam IPSEC_ULPROTO_ANY); 998105197Ssam if (!m) 999105197Ssam goto msgfail; 1000105197Ssam m_cat(result, m); 1001105197Ssam 1002105197Ssam /* create SA extension */ 1003105197Ssam m = key_setsadbsa(d); 1004105197Ssam if (!m) 1005105197Ssam goto msgfail; 1006105197Ssam m_cat(result, m); 1007105197Ssam 1008105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 1009105197Ssam result = m_pullup(result, 1010105197Ssam sizeof(struct sadb_msg)); 1011105197Ssam if (result == NULL) 1012105197Ssam goto msgfail; 1013105197Ssam } 1014105197Ssam 1015105197Ssam result->m_pkthdr.len = 0; 1016105197Ssam for (m = result; m; m = m->m_next) 1017105197Ssam result->m_pkthdr.len += m->m_len; 1018105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 1019105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 1020105197Ssam 1021105197Ssam if (key_sendup_mbuf(NULL, result, 1022105197Ssam KEY_SENDUP_REGISTERED)) 1023105197Ssam goto msgfail; 1024105197Ssam msgfail: 1025105197Ssam KEY_FREESAV(&d); 1026105197Ssam } 1027105197Ssam } 1028105197Ssam if (candidate) { 1029158767Spjd sa_addref(candidate); 1030105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1031120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 1032120585Ssam __func__, candidate->refcnt, candidate)); 1033105197Ssam } 1034120585Ssam SAHTREE_UNLOCK(); 1035119643Ssam 1036105197Ssam return candidate; 1037105197Ssam} 1038105197Ssam 1039105197Ssam/* 1040105197Ssam * allocating a usable SA entry for a *INBOUND* packet. 1041105197Ssam * Must call key_freesav() later. 1042105197Ssam * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1043105197Ssam * NULL: not found, or error occured. 1044105197Ssam * 1045105197Ssam * In the comparison, no source address is used--for RFC2401 conformance. 1046105197Ssam * To quote, from section 4.1: 1047105197Ssam * A security association is uniquely identified by a triple consisting 1048105197Ssam * of a Security Parameter Index (SPI), an IP Destination Address, and a 1049105197Ssam * security protocol (AH or ESP) identifier. 1050105197Ssam * Note that, however, we do need to keep source address in IPsec SA. 1051105197Ssam * IKE specification and PF_KEY specification do assume that we 1052105197Ssam * keep source address in IPsec SA. We see a tricky situation here. 1053105197Ssam */ 1054105197Ssamstruct secasvar * 1055105197Ssamkey_allocsa( 1056105197Ssam union sockaddr_union *dst, 1057105197Ssam u_int proto, 1058105197Ssam u_int32_t spi, 1059105197Ssam const char* where, int tag) 1060105197Ssam{ 1061183550Szec INIT_VNET_IPSEC(curvnet); 1062105197Ssam struct secashead *sah; 1063105197Ssam struct secasvar *sav; 1064128856Ssam u_int stateidx, arraysize, state; 1065128856Ssam const u_int *saorder_state_valid; 1066105197Ssam 1067120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst address")); 1068105197Ssam 1069105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1070120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 1071105197Ssam 1072105197Ssam /* 1073105197Ssam * searching SAD. 1074105197Ssam * XXX: to be checked internal IP header somewhere. Also when 1075105197Ssam * IPsec tunnel packet is received. But ESP tunnel mode is 1076105197Ssam * encrypted so we can't check internal IP header. 1077105197Ssam */ 1078120585Ssam SAHTREE_LOCK(); 1079181803Sbz if (V_key_preferred_oldsa) { 1080128856Ssam saorder_state_valid = saorder_state_valid_prefer_old; 1081128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1082128856Ssam } else { 1083128856Ssam saorder_state_valid = saorder_state_valid_prefer_new; 1084128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1085128856Ssam } 1086181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 1087105197Ssam /* search valid state */ 1088128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 1089105197Ssam state = saorder_state_valid[stateidx]; 1090105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 1091105197Ssam /* sanity check */ 1092120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 1093105197Ssam /* do not return entries w/ unusable state */ 1094105197Ssam if (sav->state != SADB_SASTATE_MATURE && 1095105197Ssam sav->state != SADB_SASTATE_DYING) 1096105197Ssam continue; 1097105197Ssam if (proto != sav->sah->saidx.proto) 1098105197Ssam continue; 1099105197Ssam if (spi != sav->spi) 1100105197Ssam continue; 1101105197Ssam#if 0 /* don't check src */ 1102105197Ssam /* check src address */ 1103105197Ssam if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1104105197Ssam continue; 1105105197Ssam#endif 1106105197Ssam /* check dst address */ 1107105197Ssam if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0) 1108105197Ssam continue; 1109158767Spjd sa_addref(sav); 1110105197Ssam goto done; 1111105197Ssam } 1112105197Ssam } 1113105197Ssam } 1114105197Ssam sav = NULL; 1115105197Ssamdone: 1116120585Ssam SAHTREE_UNLOCK(); 1117105197Ssam 1118105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1119120585Ssam printf("DP %s return SA:%p; refcnt %u\n", __func__, 1120105197Ssam sav, sav ? sav->refcnt : 0)); 1121105197Ssam return sav; 1122105197Ssam} 1123105197Ssam 1124105197Ssam/* 1125105197Ssam * Must be called after calling key_allocsp(). 1126105197Ssam * For both the packet without socket and key_freeso(). 1127105197Ssam */ 1128105197Ssamvoid 1129105197Ssam_key_freesp(struct secpolicy **spp, const char* where, int tag) 1130105197Ssam{ 1131183550Szec INIT_VNET_IPSEC(curvnet); 1132105197Ssam struct secpolicy *sp = *spp; 1133105197Ssam 1134120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1135105197Ssam 1136120585Ssam SPTREE_LOCK(); 1137105197Ssam SP_DELREF(sp); 1138105197Ssam 1139105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1140120585Ssam printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1141120585Ssam __func__, sp, sp->id, where, tag, sp->refcnt)); 1142105197Ssam 1143105197Ssam if (sp->refcnt == 0) { 1144105197Ssam *spp = NULL; 1145105197Ssam key_delsp(sp); 1146105197Ssam } 1147120585Ssam SPTREE_UNLOCK(); 1148105197Ssam} 1149105197Ssam 1150105197Ssam/* 1151105197Ssam * Must be called after calling key_allocsp(). 1152105197Ssam * For the packet with socket. 1153105197Ssam */ 1154105197Ssamvoid 1155105197Ssamkey_freeso(struct socket *so) 1156105197Ssam{ 1157183550Szec INIT_VNET_IPSEC(curvnet); 1158120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1159105197Ssam 1160105197Ssam switch (so->so_proto->pr_domain->dom_family) { 1161105197Ssam#ifdef INET 1162105197Ssam case PF_INET: 1163105197Ssam { 1164105197Ssam struct inpcb *pcb = sotoinpcb(so); 1165105197Ssam 1166105197Ssam /* Does it have a PCB ? */ 1167105197Ssam if (pcb == NULL) 1168105197Ssam return; 1169105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1170105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1171105197Ssam } 1172105197Ssam break; 1173105197Ssam#endif 1174105197Ssam#ifdef INET6 1175105197Ssam case PF_INET6: 1176105197Ssam { 1177105197Ssam#ifdef HAVE_NRL_INPCB 1178105197Ssam struct inpcb *pcb = sotoinpcb(so); 1179105197Ssam 1180105197Ssam /* Does it have a PCB ? */ 1181105197Ssam if (pcb == NULL) 1182105197Ssam return; 1183105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1184105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1185105197Ssam#else 1186105197Ssam struct in6pcb *pcb = sotoin6pcb(so); 1187105197Ssam 1188105197Ssam /* Does it have a PCB ? */ 1189105197Ssam if (pcb == NULL) 1190105197Ssam return; 1191105197Ssam key_freesp_so(&pcb->in6p_sp->sp_in); 1192105197Ssam key_freesp_so(&pcb->in6p_sp->sp_out); 1193105197Ssam#endif 1194105197Ssam } 1195105197Ssam break; 1196105197Ssam#endif /* INET6 */ 1197105197Ssam default: 1198120585Ssam ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1199120585Ssam __func__, so->so_proto->pr_domain->dom_family)); 1200105197Ssam return; 1201105197Ssam } 1202105197Ssam} 1203105197Ssam 1204105197Ssamstatic void 1205105197Ssamkey_freesp_so(struct secpolicy **sp) 1206105197Ssam{ 1207120585Ssam IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1208105197Ssam 1209105197Ssam if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1210105197Ssam (*sp)->policy == IPSEC_POLICY_BYPASS) 1211105197Ssam return; 1212105197Ssam 1213120585Ssam IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1214120585Ssam ("invalid policy %u", (*sp)->policy)); 1215105197Ssam KEY_FREESP(sp); 1216105197Ssam} 1217105197Ssam 1218105197Ssam/* 1219105197Ssam * Must be called after calling key_allocsa(). 1220105197Ssam * This function is called by key_freesp() to free some SA allocated 1221105197Ssam * for a policy. 1222105197Ssam */ 1223105197Ssamvoid 1224105197Ssamkey_freesav(struct secasvar **psav, const char* where, int tag) 1225105197Ssam{ 1226183550Szec INIT_VNET_IPSEC(curvnet); 1227105197Ssam struct secasvar *sav = *psav; 1228105197Ssam 1229120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 1230105197Ssam 1231158767Spjd if (sa_delref(sav)) { 1232158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1233158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1234158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1235105197Ssam *psav = NULL; 1236105197Ssam key_delsav(sav); 1237158767Spjd } else { 1238158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1239158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1240158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1241105197Ssam } 1242105197Ssam} 1243105197Ssam 1244105197Ssam/* %%% SPD management */ 1245105197Ssam/* 1246105197Ssam * free security policy entry. 1247105197Ssam */ 1248105197Ssamstatic void 1249105197Ssamkey_delsp(struct secpolicy *sp) 1250105197Ssam{ 1251119643Ssam struct ipsecrequest *isr, *nextisr; 1252105197Ssam 1253120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1254120585Ssam SPTREE_LOCK_ASSERT(); 1255105197Ssam 1256105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 1257105197Ssam 1258120585Ssam IPSEC_ASSERT(sp->refcnt == 0, 1259120585Ssam ("SP with references deleted (refcnt %u)", sp->refcnt)); 1260105197Ssam 1261105197Ssam /* remove from SP index */ 1262105197Ssam if (__LIST_CHAINED(sp)) 1263105197Ssam LIST_REMOVE(sp, chain); 1264105197Ssam 1265119643Ssam for (isr = sp->req; isr != NULL; isr = nextisr) { 1266105197Ssam if (isr->sav != NULL) { 1267105197Ssam KEY_FREESAV(&isr->sav); 1268105197Ssam isr->sav = NULL; 1269105197Ssam } 1270105197Ssam 1271105197Ssam nextisr = isr->next; 1272119643Ssam ipsec_delisr(isr); 1273105197Ssam } 1274119643Ssam _key_delsp(sp); 1275105197Ssam} 1276105197Ssam 1277105197Ssam/* 1278105197Ssam * search SPD 1279105197Ssam * OUT: NULL : not found 1280105197Ssam * others : found, pointer to a SP. 1281105197Ssam */ 1282105197Ssamstatic struct secpolicy * 1283105197Ssamkey_getsp(struct secpolicyindex *spidx) 1284105197Ssam{ 1285183550Szec INIT_VNET_IPSEC(curvnet); 1286105197Ssam struct secpolicy *sp; 1287105197Ssam 1288120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1289105197Ssam 1290120585Ssam SPTREE_LOCK(); 1291181803Sbz LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1292105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1293105197Ssam continue; 1294105197Ssam if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1295105197Ssam SP_ADDREF(sp); 1296119643Ssam break; 1297105197Ssam } 1298105197Ssam } 1299120585Ssam SPTREE_UNLOCK(); 1300105197Ssam 1301119643Ssam return sp; 1302105197Ssam} 1303105197Ssam 1304105197Ssam/* 1305105197Ssam * get SP by index. 1306105197Ssam * OUT: NULL : not found 1307105197Ssam * others : found, pointer to a SP. 1308105197Ssam */ 1309105197Ssamstatic struct secpolicy * 1310105197Ssamkey_getspbyid(u_int32_t id) 1311105197Ssam{ 1312183550Szec INIT_VNET_IPSEC(curvnet); 1313105197Ssam struct secpolicy *sp; 1314105197Ssam 1315120585Ssam SPTREE_LOCK(); 1316181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1317105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1318105197Ssam continue; 1319105197Ssam if (sp->id == id) { 1320105197Ssam SP_ADDREF(sp); 1321119643Ssam goto done; 1322105197Ssam } 1323105197Ssam } 1324105197Ssam 1325181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1326105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1327105197Ssam continue; 1328105197Ssam if (sp->id == id) { 1329105197Ssam SP_ADDREF(sp); 1330119643Ssam goto done; 1331105197Ssam } 1332105197Ssam } 1333119643Ssamdone: 1334120585Ssam SPTREE_UNLOCK(); 1335105197Ssam 1336119643Ssam return sp; 1337105197Ssam} 1338105197Ssam 1339105197Ssamstruct secpolicy * 1340105197Ssamkey_newsp(const char* where, int tag) 1341105197Ssam{ 1342183550Szec INIT_VNET_IPSEC(curvnet); 1343105197Ssam struct secpolicy *newsp = NULL; 1344105197Ssam 1345105197Ssam newsp = (struct secpolicy *) 1346119643Ssam malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1347105197Ssam if (newsp) { 1348120585Ssam SECPOLICY_LOCK_INIT(newsp); 1349105197Ssam newsp->refcnt = 1; 1350105197Ssam newsp->req = NULL; 1351105197Ssam } 1352105197Ssam 1353105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1354120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 1355105197Ssam where, tag, newsp)); 1356105197Ssam return newsp; 1357105197Ssam} 1358105197Ssam 1359119643Ssamstatic void 1360119643Ssam_key_delsp(struct secpolicy *sp) 1361119643Ssam{ 1362120585Ssam SECPOLICY_LOCK_DESTROY(sp); 1363119643Ssam free(sp, M_IPSEC_SP); 1364119643Ssam} 1365119643Ssam 1366105197Ssam/* 1367105197Ssam * create secpolicy structure from sadb_x_policy structure. 1368105197Ssam * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1369105197Ssam * so must be set properly later. 1370105197Ssam */ 1371105197Ssamstruct secpolicy * 1372105197Ssamkey_msg2sp(xpl0, len, error) 1373105197Ssam struct sadb_x_policy *xpl0; 1374105197Ssam size_t len; 1375105197Ssam int *error; 1376105197Ssam{ 1377183550Szec INIT_VNET_IPSEC(curvnet); 1378105197Ssam struct secpolicy *newsp; 1379105197Ssam 1380120585Ssam IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1381127972Spjd IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1382120585Ssam 1383105197Ssam if (len != PFKEY_EXTLEN(xpl0)) { 1384120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1385105197Ssam *error = EINVAL; 1386105197Ssam return NULL; 1387105197Ssam } 1388105197Ssam 1389105197Ssam if ((newsp = KEY_NEWSP()) == NULL) { 1390105197Ssam *error = ENOBUFS; 1391105197Ssam return NULL; 1392105197Ssam } 1393105197Ssam 1394105197Ssam newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1395105197Ssam newsp->policy = xpl0->sadb_x_policy_type; 1396105197Ssam 1397105197Ssam /* check policy */ 1398105197Ssam switch (xpl0->sadb_x_policy_type) { 1399105197Ssam case IPSEC_POLICY_DISCARD: 1400105197Ssam case IPSEC_POLICY_NONE: 1401105197Ssam case IPSEC_POLICY_ENTRUST: 1402105197Ssam case IPSEC_POLICY_BYPASS: 1403105197Ssam newsp->req = NULL; 1404105197Ssam break; 1405105197Ssam 1406105197Ssam case IPSEC_POLICY_IPSEC: 1407105197Ssam { 1408105197Ssam int tlen; 1409105197Ssam struct sadb_x_ipsecrequest *xisr; 1410105197Ssam struct ipsecrequest **p_isr = &newsp->req; 1411105197Ssam 1412105197Ssam /* validity check */ 1413105197Ssam if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1414120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1415120585Ssam __func__)); 1416105197Ssam KEY_FREESP(&newsp); 1417105197Ssam *error = EINVAL; 1418105197Ssam return NULL; 1419105197Ssam } 1420105197Ssam 1421105197Ssam tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1422105197Ssam xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1423105197Ssam 1424105197Ssam while (tlen > 0) { 1425105197Ssam /* length check */ 1426105197Ssam if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1427120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1428120585Ssam "length.\n", __func__)); 1429105197Ssam KEY_FREESP(&newsp); 1430105197Ssam *error = EINVAL; 1431105197Ssam return NULL; 1432105197Ssam } 1433105197Ssam 1434105197Ssam /* allocate request buffer */ 1435119643Ssam /* NB: data structure is zero'd */ 1436119643Ssam *p_isr = ipsec_newisr(); 1437105197Ssam if ((*p_isr) == NULL) { 1438105197Ssam ipseclog((LOG_DEBUG, 1439120585Ssam "%s: No more memory.\n", __func__)); 1440105197Ssam KEY_FREESP(&newsp); 1441105197Ssam *error = ENOBUFS; 1442105197Ssam return NULL; 1443105197Ssam } 1444105197Ssam 1445105197Ssam /* set values */ 1446105197Ssam switch (xisr->sadb_x_ipsecrequest_proto) { 1447105197Ssam case IPPROTO_ESP: 1448105197Ssam case IPPROTO_AH: 1449105197Ssam case IPPROTO_IPCOMP: 1450105197Ssam break; 1451105197Ssam default: 1452105197Ssam ipseclog((LOG_DEBUG, 1453120585Ssam "%s: invalid proto type=%u\n", __func__, 1454105197Ssam xisr->sadb_x_ipsecrequest_proto)); 1455105197Ssam KEY_FREESP(&newsp); 1456105197Ssam *error = EPROTONOSUPPORT; 1457105197Ssam return NULL; 1458105197Ssam } 1459105197Ssam (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1460105197Ssam 1461105197Ssam switch (xisr->sadb_x_ipsecrequest_mode) { 1462105197Ssam case IPSEC_MODE_TRANSPORT: 1463105197Ssam case IPSEC_MODE_TUNNEL: 1464105197Ssam break; 1465105197Ssam case IPSEC_MODE_ANY: 1466105197Ssam default: 1467105197Ssam ipseclog((LOG_DEBUG, 1468120585Ssam "%s: invalid mode=%u\n", __func__, 1469105197Ssam xisr->sadb_x_ipsecrequest_mode)); 1470105197Ssam KEY_FREESP(&newsp); 1471105197Ssam *error = EINVAL; 1472105197Ssam return NULL; 1473105197Ssam } 1474105197Ssam (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1475105197Ssam 1476105197Ssam switch (xisr->sadb_x_ipsecrequest_level) { 1477105197Ssam case IPSEC_LEVEL_DEFAULT: 1478105197Ssam case IPSEC_LEVEL_USE: 1479105197Ssam case IPSEC_LEVEL_REQUIRE: 1480105197Ssam break; 1481105197Ssam case IPSEC_LEVEL_UNIQUE: 1482105197Ssam /* validity check */ 1483105197Ssam /* 1484105197Ssam * If range violation of reqid, kernel will 1485105197Ssam * update it, don't refuse it. 1486105197Ssam */ 1487105197Ssam if (xisr->sadb_x_ipsecrequest_reqid 1488105197Ssam > IPSEC_MANUAL_REQID_MAX) { 1489105197Ssam ipseclog((LOG_DEBUG, 1490120585Ssam "%s: reqid=%d range " 1491105197Ssam "violation, updated by kernel.\n", 1492120585Ssam __func__, 1493105197Ssam xisr->sadb_x_ipsecrequest_reqid)); 1494105197Ssam xisr->sadb_x_ipsecrequest_reqid = 0; 1495105197Ssam } 1496105197Ssam 1497105197Ssam /* allocate new reqid id if reqid is zero. */ 1498105197Ssam if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1499105197Ssam u_int32_t reqid; 1500105197Ssam if ((reqid = key_newreqid()) == 0) { 1501105197Ssam KEY_FREESP(&newsp); 1502105197Ssam *error = ENOBUFS; 1503105197Ssam return NULL; 1504105197Ssam } 1505105197Ssam (*p_isr)->saidx.reqid = reqid; 1506105197Ssam xisr->sadb_x_ipsecrequest_reqid = reqid; 1507105197Ssam } else { 1508105197Ssam /* set it for manual keying. */ 1509105197Ssam (*p_isr)->saidx.reqid = 1510105197Ssam xisr->sadb_x_ipsecrequest_reqid; 1511105197Ssam } 1512105197Ssam break; 1513105197Ssam 1514105197Ssam default: 1515120585Ssam ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1516120585Ssam __func__, 1517105197Ssam xisr->sadb_x_ipsecrequest_level)); 1518105197Ssam KEY_FREESP(&newsp); 1519105197Ssam *error = EINVAL; 1520105197Ssam return NULL; 1521105197Ssam } 1522105197Ssam (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1523105197Ssam 1524105197Ssam /* set IP addresses if there */ 1525105197Ssam if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1526105197Ssam struct sockaddr *paddr; 1527105197Ssam 1528105197Ssam paddr = (struct sockaddr *)(xisr + 1); 1529105197Ssam 1530105197Ssam /* validity check */ 1531105197Ssam if (paddr->sa_len 1532105197Ssam > sizeof((*p_isr)->saidx.src)) { 1533120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1534120585Ssam "request address length.\n", 1535120585Ssam __func__)); 1536105197Ssam KEY_FREESP(&newsp); 1537105197Ssam *error = EINVAL; 1538105197Ssam return NULL; 1539105197Ssam } 1540105197Ssam bcopy(paddr, &(*p_isr)->saidx.src, 1541105197Ssam paddr->sa_len); 1542105197Ssam 1543105197Ssam paddr = (struct sockaddr *)((caddr_t)paddr 1544105197Ssam + paddr->sa_len); 1545105197Ssam 1546105197Ssam /* validity check */ 1547105197Ssam if (paddr->sa_len 1548105197Ssam > sizeof((*p_isr)->saidx.dst)) { 1549120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1550120585Ssam "request address length.\n", 1551120585Ssam __func__)); 1552105197Ssam KEY_FREESP(&newsp); 1553105197Ssam *error = EINVAL; 1554105197Ssam return NULL; 1555105197Ssam } 1556105197Ssam bcopy(paddr, &(*p_isr)->saidx.dst, 1557105197Ssam paddr->sa_len); 1558105197Ssam } 1559105197Ssam 1560105197Ssam (*p_isr)->sp = newsp; 1561105197Ssam 1562105197Ssam /* initialization for the next. */ 1563105197Ssam p_isr = &(*p_isr)->next; 1564105197Ssam tlen -= xisr->sadb_x_ipsecrequest_len; 1565105197Ssam 1566105197Ssam /* validity check */ 1567105197Ssam if (tlen < 0) { 1568120585Ssam ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1569120585Ssam __func__)); 1570105197Ssam KEY_FREESP(&newsp); 1571105197Ssam *error = EINVAL; 1572105197Ssam return NULL; 1573105197Ssam } 1574105197Ssam 1575105197Ssam xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1576105197Ssam + xisr->sadb_x_ipsecrequest_len); 1577105197Ssam } 1578105197Ssam } 1579105197Ssam break; 1580105197Ssam default: 1581120585Ssam ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1582105197Ssam KEY_FREESP(&newsp); 1583105197Ssam *error = EINVAL; 1584105197Ssam return NULL; 1585105197Ssam } 1586105197Ssam 1587105197Ssam *error = 0; 1588105197Ssam return newsp; 1589105197Ssam} 1590105197Ssam 1591105197Ssamstatic u_int32_t 1592105197Ssamkey_newreqid() 1593105197Ssam{ 1594105197Ssam static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1595105197Ssam 1596105197Ssam auto_reqid = (auto_reqid == ~0 1597105197Ssam ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1598105197Ssam 1599105197Ssam /* XXX should be unique check */ 1600105197Ssam 1601105197Ssam return auto_reqid; 1602105197Ssam} 1603105197Ssam 1604105197Ssam/* 1605105197Ssam * copy secpolicy struct to sadb_x_policy structure indicated. 1606105197Ssam */ 1607105197Ssamstruct mbuf * 1608105197Ssamkey_sp2msg(sp) 1609105197Ssam struct secpolicy *sp; 1610105197Ssam{ 1611105197Ssam struct sadb_x_policy *xpl; 1612105197Ssam int tlen; 1613105197Ssam caddr_t p; 1614105197Ssam struct mbuf *m; 1615105197Ssam 1616120585Ssam IPSEC_ASSERT(sp != NULL, ("null policy")); 1617105197Ssam 1618105197Ssam tlen = key_getspreqmsglen(sp); 1619105197Ssam 1620105197Ssam m = key_alloc_mbuf(tlen); 1621105197Ssam if (!m || m->m_next) { /*XXX*/ 1622105197Ssam if (m) 1623105197Ssam m_freem(m); 1624105197Ssam return NULL; 1625105197Ssam } 1626105197Ssam 1627105197Ssam m->m_len = tlen; 1628105197Ssam m->m_next = NULL; 1629105197Ssam xpl = mtod(m, struct sadb_x_policy *); 1630105197Ssam bzero(xpl, tlen); 1631105197Ssam 1632105197Ssam xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1633105197Ssam xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1634105197Ssam xpl->sadb_x_policy_type = sp->policy; 1635105197Ssam xpl->sadb_x_policy_dir = sp->spidx.dir; 1636105197Ssam xpl->sadb_x_policy_id = sp->id; 1637105197Ssam p = (caddr_t)xpl + sizeof(*xpl); 1638105197Ssam 1639105197Ssam /* if is the policy for ipsec ? */ 1640105197Ssam if (sp->policy == IPSEC_POLICY_IPSEC) { 1641105197Ssam struct sadb_x_ipsecrequest *xisr; 1642105197Ssam struct ipsecrequest *isr; 1643105197Ssam 1644105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 1645105197Ssam 1646105197Ssam xisr = (struct sadb_x_ipsecrequest *)p; 1647105197Ssam 1648105197Ssam xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1649105197Ssam xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1650105197Ssam xisr->sadb_x_ipsecrequest_level = isr->level; 1651105197Ssam xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1652105197Ssam 1653105197Ssam p += sizeof(*xisr); 1654105197Ssam bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1655105197Ssam p += isr->saidx.src.sa.sa_len; 1656105197Ssam bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1657105197Ssam p += isr->saidx.src.sa.sa_len; 1658105197Ssam 1659105197Ssam xisr->sadb_x_ipsecrequest_len = 1660105197Ssam PFKEY_ALIGN8(sizeof(*xisr) 1661105197Ssam + isr->saidx.src.sa.sa_len 1662105197Ssam + isr->saidx.dst.sa.sa_len); 1663105197Ssam } 1664105197Ssam } 1665105197Ssam 1666105197Ssam return m; 1667105197Ssam} 1668105197Ssam 1669105197Ssam/* m will not be freed nor modified */ 1670105197Ssamstatic struct mbuf * 1671105197Ssam#ifdef __STDC__ 1672105197Ssamkey_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1673105197Ssam int ndeep, int nitem, ...) 1674105197Ssam#else 1675105197Ssamkey_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1676105197Ssam struct mbuf *m; 1677105197Ssam const struct sadb_msghdr *mhp; 1678105197Ssam int ndeep; 1679105197Ssam int nitem; 1680105197Ssam va_dcl 1681105197Ssam#endif 1682105197Ssam{ 1683105197Ssam va_list ap; 1684105197Ssam int idx; 1685105197Ssam int i; 1686105197Ssam struct mbuf *result = NULL, *n; 1687105197Ssam int len; 1688105197Ssam 1689120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1690120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1691105197Ssam 1692105197Ssam va_start(ap, nitem); 1693105197Ssam for (i = 0; i < nitem; i++) { 1694105197Ssam idx = va_arg(ap, int); 1695105197Ssam if (idx < 0 || idx > SADB_EXT_MAX) 1696105197Ssam goto fail; 1697105197Ssam /* don't attempt to pull empty extension */ 1698105197Ssam if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1699105197Ssam continue; 1700105197Ssam if (idx != SADB_EXT_RESERVED && 1701105197Ssam (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1702105197Ssam continue; 1703105197Ssam 1704105197Ssam if (idx == SADB_EXT_RESERVED) { 1705105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1706120585Ssam 1707120585Ssam IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1708120585Ssam 1709111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 1710105197Ssam if (!n) 1711105197Ssam goto fail; 1712105197Ssam n->m_len = len; 1713105197Ssam n->m_next = NULL; 1714105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), 1715105197Ssam mtod(n, caddr_t)); 1716105197Ssam } else if (i < ndeep) { 1717105197Ssam len = mhp->extlen[idx]; 1718105197Ssam n = key_alloc_mbuf(len); 1719105197Ssam if (!n || n->m_next) { /*XXX*/ 1720105197Ssam if (n) 1721105197Ssam m_freem(n); 1722105197Ssam goto fail; 1723105197Ssam } 1724105197Ssam m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1725105197Ssam mtod(n, caddr_t)); 1726105197Ssam } else { 1727105197Ssam n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1728111119Simp M_DONTWAIT); 1729105197Ssam } 1730105197Ssam if (n == NULL) 1731105197Ssam goto fail; 1732105197Ssam 1733105197Ssam if (result) 1734105197Ssam m_cat(result, n); 1735105197Ssam else 1736105197Ssam result = n; 1737105197Ssam } 1738105197Ssam va_end(ap); 1739105197Ssam 1740105197Ssam if ((result->m_flags & M_PKTHDR) != 0) { 1741105197Ssam result->m_pkthdr.len = 0; 1742105197Ssam for (n = result; n; n = n->m_next) 1743105197Ssam result->m_pkthdr.len += n->m_len; 1744105197Ssam } 1745105197Ssam 1746105197Ssam return result; 1747105197Ssam 1748105197Ssamfail: 1749105197Ssam m_freem(result); 1750105197Ssam return NULL; 1751105197Ssam} 1752105197Ssam 1753105197Ssam/* 1754105197Ssam * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1755108533Sschweikh * add an entry to SP database, when received 1756105197Ssam * <base, address(SD), (lifetime(H),) policy> 1757105197Ssam * from the user(?). 1758105197Ssam * Adding to SP database, 1759105197Ssam * and send 1760105197Ssam * <base, address(SD), (lifetime(H),) policy> 1761105197Ssam * to the socket which was send. 1762105197Ssam * 1763105197Ssam * SPDADD set a unique policy entry. 1764105197Ssam * SPDSETIDX like SPDADD without a part of policy requests. 1765105197Ssam * SPDUPDATE replace a unique policy entry. 1766105197Ssam * 1767105197Ssam * m will always be freed. 1768105197Ssam */ 1769105197Ssamstatic int 1770105197Ssamkey_spdadd(so, m, mhp) 1771105197Ssam struct socket *so; 1772105197Ssam struct mbuf *m; 1773105197Ssam const struct sadb_msghdr *mhp; 1774105197Ssam{ 1775183550Szec INIT_VNET_IPSEC(curvnet); 1776105197Ssam struct sadb_address *src0, *dst0; 1777105197Ssam struct sadb_x_policy *xpl0, *xpl; 1778105197Ssam struct sadb_lifetime *lft = NULL; 1779105197Ssam struct secpolicyindex spidx; 1780105197Ssam struct secpolicy *newsp; 1781105197Ssam int error; 1782105197Ssam 1783120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 1784120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1785120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1786120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1787105197Ssam 1788105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1789105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1790105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1791105197Ssam ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1792105197Ssam return key_senderror(so, m, EINVAL); 1793105197Ssam } 1794105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1795105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1796105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1797120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1798120585Ssam __func__)); 1799105197Ssam return key_senderror(so, m, EINVAL); 1800105197Ssam } 1801105197Ssam if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1802105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1803105197Ssam < sizeof(struct sadb_lifetime)) { 1804120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1805120585Ssam __func__)); 1806105197Ssam return key_senderror(so, m, EINVAL); 1807105197Ssam } 1808105197Ssam lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1809105197Ssam } 1810105197Ssam 1811105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1812105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1813105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1814105197Ssam 1815105197Ssam /* make secindex */ 1816105197Ssam /* XXX boundary check against sa_len */ 1817105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1818105197Ssam src0 + 1, 1819105197Ssam dst0 + 1, 1820105197Ssam src0->sadb_address_prefixlen, 1821105197Ssam dst0->sadb_address_prefixlen, 1822105197Ssam src0->sadb_address_proto, 1823105197Ssam &spidx); 1824105197Ssam 1825105197Ssam /* checking the direciton. */ 1826105197Ssam switch (xpl0->sadb_x_policy_dir) { 1827105197Ssam case IPSEC_DIR_INBOUND: 1828105197Ssam case IPSEC_DIR_OUTBOUND: 1829105197Ssam break; 1830105197Ssam default: 1831120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1832105197Ssam mhp->msg->sadb_msg_errno = EINVAL; 1833105197Ssam return 0; 1834105197Ssam } 1835105197Ssam 1836105197Ssam /* check policy */ 1837105197Ssam /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1838105197Ssam if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1839105197Ssam || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1840120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1841105197Ssam return key_senderror(so, m, EINVAL); 1842105197Ssam } 1843105197Ssam 1844105197Ssam /* policy requests are mandatory when action is ipsec. */ 1845105197Ssam if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1846105197Ssam && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1847105197Ssam && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1848120585Ssam ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1849120585Ssam __func__)); 1850105197Ssam return key_senderror(so, m, EINVAL); 1851105197Ssam } 1852105197Ssam 1853105197Ssam /* 1854105197Ssam * checking there is SP already or not. 1855105197Ssam * SPDUPDATE doesn't depend on whether there is a SP or not. 1856105197Ssam * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1857105197Ssam * then error. 1858105197Ssam */ 1859105197Ssam newsp = key_getsp(&spidx); 1860105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1861105197Ssam if (newsp) { 1862105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1863105197Ssam KEY_FREESP(&newsp); 1864105197Ssam } 1865105197Ssam } else { 1866105197Ssam if (newsp != NULL) { 1867105197Ssam KEY_FREESP(&newsp); 1868120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1869120585Ssam __func__)); 1870105197Ssam return key_senderror(so, m, EEXIST); 1871105197Ssam } 1872105197Ssam } 1873105197Ssam 1874105197Ssam /* allocation new SP entry */ 1875105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1876105197Ssam return key_senderror(so, m, error); 1877105197Ssam } 1878105197Ssam 1879105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1880119643Ssam _key_delsp(newsp); 1881105197Ssam return key_senderror(so, m, ENOBUFS); 1882105197Ssam } 1883105197Ssam 1884105197Ssam /* XXX boundary check against sa_len */ 1885105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1886105197Ssam src0 + 1, 1887105197Ssam dst0 + 1, 1888105197Ssam src0->sadb_address_prefixlen, 1889105197Ssam dst0->sadb_address_prefixlen, 1890105197Ssam src0->sadb_address_proto, 1891105197Ssam &newsp->spidx); 1892105197Ssam 1893105197Ssam /* sanity check on addr pair */ 1894105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1895105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1896119643Ssam _key_delsp(newsp); 1897105197Ssam return key_senderror(so, m, EINVAL); 1898105197Ssam } 1899105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1900105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1901119643Ssam _key_delsp(newsp); 1902105197Ssam return key_senderror(so, m, EINVAL); 1903105197Ssam } 1904105197Ssam#if 1 1905105197Ssam if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1906105197Ssam struct sockaddr *sa; 1907105197Ssam sa = (struct sockaddr *)(src0 + 1); 1908105197Ssam if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1909119643Ssam _key_delsp(newsp); 1910105197Ssam return key_senderror(so, m, EINVAL); 1911105197Ssam } 1912105197Ssam } 1913105197Ssam if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1914105197Ssam struct sockaddr *sa; 1915105197Ssam sa = (struct sockaddr *)(dst0 + 1); 1916105197Ssam if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1917119643Ssam _key_delsp(newsp); 1918105197Ssam return key_senderror(so, m, EINVAL); 1919105197Ssam } 1920105197Ssam } 1921105197Ssam#endif 1922105197Ssam 1923105197Ssam newsp->created = time_second; 1924105197Ssam newsp->lastused = newsp->created; 1925105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1926105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1927105197Ssam 1928105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1929105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1930181803Sbz LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1931105197Ssam 1932105197Ssam /* delete the entry in spacqtree */ 1933105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1934119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1935119643Ssam if (spacq != NULL) { 1936105197Ssam /* reset counter in order to deletion by timehandler. */ 1937105197Ssam spacq->created = time_second; 1938105197Ssam spacq->count = 0; 1939120585Ssam SPACQ_UNLOCK(); 1940105197Ssam } 1941105197Ssam } 1942105197Ssam 1943105197Ssam { 1944105197Ssam struct mbuf *n, *mpolicy; 1945105197Ssam struct sadb_msg *newmsg; 1946105197Ssam int off; 1947105197Ssam 1948105197Ssam /* create new sadb_msg to reply. */ 1949105197Ssam if (lft) { 1950105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1951105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1952105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1953105197Ssam } else { 1954105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1955105197Ssam SADB_X_EXT_POLICY, 1956105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1957105197Ssam } 1958105197Ssam if (!n) 1959105197Ssam return key_senderror(so, m, ENOBUFS); 1960105197Ssam 1961105197Ssam if (n->m_len < sizeof(*newmsg)) { 1962105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1963105197Ssam if (!n) 1964105197Ssam return key_senderror(so, m, ENOBUFS); 1965105197Ssam } 1966105197Ssam newmsg = mtod(n, struct sadb_msg *); 1967105197Ssam newmsg->sadb_msg_errno = 0; 1968105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1969105197Ssam 1970105197Ssam off = 0; 1971105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1972105197Ssam sizeof(*xpl), &off); 1973105197Ssam if (mpolicy == NULL) { 1974105197Ssam /* n is already freed */ 1975105197Ssam return key_senderror(so, m, ENOBUFS); 1976105197Ssam } 1977105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1978105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1979105197Ssam m_freem(n); 1980105197Ssam return key_senderror(so, m, EINVAL); 1981105197Ssam } 1982105197Ssam xpl->sadb_x_policy_id = newsp->id; 1983105197Ssam 1984105197Ssam m_freem(m); 1985105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1986105197Ssam } 1987105197Ssam} 1988105197Ssam 1989105197Ssam/* 1990105197Ssam * get new policy id. 1991105197Ssam * OUT: 1992105197Ssam * 0: failure. 1993105197Ssam * others: success. 1994105197Ssam */ 1995105197Ssamstatic u_int32_t 1996105197Ssamkey_getnewspid() 1997105197Ssam{ 1998183550Szec INIT_VNET_IPSEC(curvnet); 1999105197Ssam u_int32_t newid = 0; 2000181803Sbz int count = V_key_spi_trycnt; /* XXX */ 2001105197Ssam struct secpolicy *sp; 2002105197Ssam 2003105197Ssam /* when requesting to allocate spi ranged */ 2004105197Ssam while (count--) { 2005181803Sbz newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2006105197Ssam 2007105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 2008105197Ssam break; 2009105197Ssam 2010105197Ssam KEY_FREESP(&sp); 2011105197Ssam } 2012105197Ssam 2013105197Ssam if (count == 0 || newid == 0) { 2014120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2015120585Ssam __func__)); 2016105197Ssam return 0; 2017105197Ssam } 2018105197Ssam 2019105197Ssam return newid; 2020105197Ssam} 2021105197Ssam 2022105197Ssam/* 2023105197Ssam * SADB_SPDDELETE processing 2024105197Ssam * receive 2025105197Ssam * <base, address(SD), policy(*)> 2026105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2027105197Ssam * and send, 2028105197Ssam * <base, address(SD), policy(*)> 2029105197Ssam * to the ikmpd. 2030105197Ssam * policy(*) including direction of policy. 2031105197Ssam * 2032105197Ssam * m will always be freed. 2033105197Ssam */ 2034105197Ssamstatic int 2035105197Ssamkey_spddelete(so, m, mhp) 2036105197Ssam struct socket *so; 2037105197Ssam struct mbuf *m; 2038105197Ssam const struct sadb_msghdr *mhp; 2039105197Ssam{ 2040183550Szec INIT_VNET_IPSEC(curvnet); 2041105197Ssam struct sadb_address *src0, *dst0; 2042105197Ssam struct sadb_x_policy *xpl0; 2043105197Ssam struct secpolicyindex spidx; 2044105197Ssam struct secpolicy *sp; 2045105197Ssam 2046120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 2047120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2048120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2049120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2050105197Ssam 2051105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2052105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2053105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2054120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2055120585Ssam __func__)); 2056105197Ssam return key_senderror(so, m, EINVAL); 2057105197Ssam } 2058105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2059105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2060105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2061120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2062120585Ssam __func__)); 2063105197Ssam return key_senderror(so, m, EINVAL); 2064105197Ssam } 2065105197Ssam 2066105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2067105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2068105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2069105197Ssam 2070105197Ssam /* make secindex */ 2071105197Ssam /* XXX boundary check against sa_len */ 2072105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2073105197Ssam src0 + 1, 2074105197Ssam dst0 + 1, 2075105197Ssam src0->sadb_address_prefixlen, 2076105197Ssam dst0->sadb_address_prefixlen, 2077105197Ssam src0->sadb_address_proto, 2078105197Ssam &spidx); 2079105197Ssam 2080105197Ssam /* checking the direciton. */ 2081105197Ssam switch (xpl0->sadb_x_policy_dir) { 2082105197Ssam case IPSEC_DIR_INBOUND: 2083105197Ssam case IPSEC_DIR_OUTBOUND: 2084105197Ssam break; 2085105197Ssam default: 2086120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2087105197Ssam return key_senderror(so, m, EINVAL); 2088105197Ssam } 2089105197Ssam 2090105197Ssam /* Is there SP in SPD ? */ 2091105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2092120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2093105197Ssam return key_senderror(so, m, EINVAL); 2094105197Ssam } 2095105197Ssam 2096105197Ssam /* save policy id to buffer to be returned. */ 2097105197Ssam xpl0->sadb_x_policy_id = sp->id; 2098105197Ssam 2099105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2100105197Ssam KEY_FREESP(&sp); 2101105197Ssam 2102105197Ssam { 2103105197Ssam struct mbuf *n; 2104105197Ssam struct sadb_msg *newmsg; 2105105197Ssam 2106105197Ssam /* create new sadb_msg to reply. */ 2107105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2108105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2109105197Ssam if (!n) 2110105197Ssam return key_senderror(so, m, ENOBUFS); 2111105197Ssam 2112105197Ssam newmsg = mtod(n, struct sadb_msg *); 2113105197Ssam newmsg->sadb_msg_errno = 0; 2114105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2115105197Ssam 2116105197Ssam m_freem(m); 2117105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2118105197Ssam } 2119105197Ssam} 2120105197Ssam 2121105197Ssam/* 2122105197Ssam * SADB_SPDDELETE2 processing 2123105197Ssam * receive 2124105197Ssam * <base, policy(*)> 2125105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2126105197Ssam * and send, 2127105197Ssam * <base, policy(*)> 2128105197Ssam * to the ikmpd. 2129105197Ssam * policy(*) including direction of policy. 2130105197Ssam * 2131105197Ssam * m will always be freed. 2132105197Ssam */ 2133105197Ssamstatic int 2134105197Ssamkey_spddelete2(so, m, mhp) 2135105197Ssam struct socket *so; 2136105197Ssam struct mbuf *m; 2137105197Ssam const struct sadb_msghdr *mhp; 2138105197Ssam{ 2139183550Szec INIT_VNET_IPSEC(curvnet); 2140105197Ssam u_int32_t id; 2141105197Ssam struct secpolicy *sp; 2142105197Ssam 2143120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2144120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2145120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2146120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2147105197Ssam 2148105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2149105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2150120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2151170803Sbz return key_senderror(so, m, EINVAL); 2152105197Ssam } 2153105197Ssam 2154105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2155105197Ssam 2156105197Ssam /* Is there SP in SPD ? */ 2157105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2158120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2159170803Sbz return key_senderror(so, m, EINVAL); 2160105197Ssam } 2161105197Ssam 2162105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2163105197Ssam KEY_FREESP(&sp); 2164105197Ssam 2165105197Ssam { 2166105197Ssam struct mbuf *n, *nn; 2167105197Ssam struct sadb_msg *newmsg; 2168105197Ssam int off, len; 2169105197Ssam 2170105197Ssam /* create new sadb_msg to reply. */ 2171105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2172105197Ssam 2173111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2174105197Ssam if (n && len > MHLEN) { 2175111119Simp MCLGET(n, M_DONTWAIT); 2176105197Ssam if ((n->m_flags & M_EXT) == 0) { 2177105197Ssam m_freem(n); 2178105197Ssam n = NULL; 2179105197Ssam } 2180105197Ssam } 2181105197Ssam if (!n) 2182105197Ssam return key_senderror(so, m, ENOBUFS); 2183105197Ssam 2184105197Ssam n->m_len = len; 2185105197Ssam n->m_next = NULL; 2186105197Ssam off = 0; 2187105197Ssam 2188105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2189105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2190105197Ssam 2191120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2192120585Ssam off, len)); 2193105197Ssam 2194105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2195111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2196105197Ssam if (!n->m_next) { 2197105197Ssam m_freem(n); 2198105197Ssam return key_senderror(so, m, ENOBUFS); 2199105197Ssam } 2200105197Ssam 2201105197Ssam n->m_pkthdr.len = 0; 2202105197Ssam for (nn = n; nn; nn = nn->m_next) 2203105197Ssam n->m_pkthdr.len += nn->m_len; 2204105197Ssam 2205105197Ssam newmsg = mtod(n, struct sadb_msg *); 2206105197Ssam newmsg->sadb_msg_errno = 0; 2207105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2208105197Ssam 2209105197Ssam m_freem(m); 2210105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2211105197Ssam } 2212105197Ssam} 2213105197Ssam 2214105197Ssam/* 2215105197Ssam * SADB_X_GET processing 2216105197Ssam * receive 2217105197Ssam * <base, policy(*)> 2218105197Ssam * from the user(?), 2219105197Ssam * and send, 2220105197Ssam * <base, address(SD), policy> 2221105197Ssam * to the ikmpd. 2222105197Ssam * policy(*) including direction of policy. 2223105197Ssam * 2224105197Ssam * m will always be freed. 2225105197Ssam */ 2226105197Ssamstatic int 2227105197Ssamkey_spdget(so, m, mhp) 2228105197Ssam struct socket *so; 2229105197Ssam struct mbuf *m; 2230105197Ssam const struct sadb_msghdr *mhp; 2231105197Ssam{ 2232183550Szec INIT_VNET_IPSEC(curvnet); 2233105197Ssam u_int32_t id; 2234105197Ssam struct secpolicy *sp; 2235105197Ssam struct mbuf *n; 2236105197Ssam 2237120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2238120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2239120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2240120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2241105197Ssam 2242105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2243105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2244120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2245120585Ssam __func__)); 2246105197Ssam return key_senderror(so, m, EINVAL); 2247105197Ssam } 2248105197Ssam 2249105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2250105197Ssam 2251105197Ssam /* Is there SP in SPD ? */ 2252105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2253120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2254105197Ssam return key_senderror(so, m, ENOENT); 2255105197Ssam } 2256105197Ssam 2257105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2258105197Ssam if (n != NULL) { 2259105197Ssam m_freem(m); 2260105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2261105197Ssam } else 2262105197Ssam return key_senderror(so, m, ENOBUFS); 2263105197Ssam} 2264105197Ssam 2265105197Ssam/* 2266105197Ssam * SADB_X_SPDACQUIRE processing. 2267105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2268105197Ssam * send 2269105197Ssam * <base, policy(*)> 2270105197Ssam * to KMD, and expect to receive 2271105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2272105197Ssam * or 2273105197Ssam * <base, policy> 2274105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2275105197Ssam * policy(*) is without policy requests. 2276105197Ssam * 2277105197Ssam * 0 : succeed 2278105197Ssam * others: error number 2279105197Ssam */ 2280105197Ssamint 2281105197Ssamkey_spdacquire(sp) 2282105197Ssam struct secpolicy *sp; 2283105197Ssam{ 2284183550Szec INIT_VNET_IPSEC(curvnet); 2285105197Ssam struct mbuf *result = NULL, *m; 2286105197Ssam struct secspacq *newspacq; 2287105197Ssam 2288120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2289120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2290120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2291120585Ssam ("policy not IPSEC %u", sp->policy)); 2292105197Ssam 2293108533Sschweikh /* Get an entry to check whether sent message or not. */ 2294119643Ssam newspacq = key_getspacq(&sp->spidx); 2295119643Ssam if (newspacq != NULL) { 2296181803Sbz if (V_key_blockacq_count < newspacq->count) { 2297105197Ssam /* reset counter and do send message. */ 2298105197Ssam newspacq->count = 0; 2299105197Ssam } else { 2300105197Ssam /* increment counter and do nothing. */ 2301105197Ssam newspacq->count++; 2302105197Ssam return 0; 2303105197Ssam } 2304120585Ssam SPACQ_UNLOCK(); 2305105197Ssam } else { 2306105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2307119643Ssam newspacq = key_newspacq(&sp->spidx); 2308119643Ssam if (newspacq == NULL) 2309105197Ssam return ENOBUFS; 2310105197Ssam } 2311105197Ssam 2312105197Ssam /* create new sadb_msg to reply. */ 2313105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2314170805Sbz if (!m) 2315170805Sbz return ENOBUFS; 2316170805Sbz 2317105197Ssam result = m; 2318105197Ssam 2319105197Ssam result->m_pkthdr.len = 0; 2320105197Ssam for (m = result; m; m = m->m_next) 2321105197Ssam result->m_pkthdr.len += m->m_len; 2322105197Ssam 2323105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2324105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2325105197Ssam 2326105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2327105197Ssam} 2328105197Ssam 2329105197Ssam/* 2330105197Ssam * SADB_SPDFLUSH processing 2331105197Ssam * receive 2332105197Ssam * <base> 2333105197Ssam * from the user, and free all entries in secpctree. 2334105197Ssam * and send, 2335105197Ssam * <base> 2336105197Ssam * to the user. 2337105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2338105197Ssam * 2339105197Ssam * m will always be freed. 2340105197Ssam */ 2341105197Ssamstatic int 2342105197Ssamkey_spdflush(so, m, mhp) 2343105197Ssam struct socket *so; 2344105197Ssam struct mbuf *m; 2345105197Ssam const struct sadb_msghdr *mhp; 2346105197Ssam{ 2347183550Szec INIT_VNET_IPSEC(curvnet); 2348105197Ssam struct sadb_msg *newmsg; 2349105197Ssam struct secpolicy *sp; 2350105197Ssam u_int dir; 2351105197Ssam 2352120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2353120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2354120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2355120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2356105197Ssam 2357105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2358105197Ssam return key_senderror(so, m, EINVAL); 2359105197Ssam 2360105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2361120585Ssam SPTREE_LOCK(); 2362181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) 2363105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2364120585Ssam SPTREE_UNLOCK(); 2365105197Ssam } 2366105197Ssam 2367105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2368120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2369105197Ssam return key_senderror(so, m, ENOBUFS); 2370105197Ssam } 2371105197Ssam 2372105197Ssam if (m->m_next) 2373105197Ssam m_freem(m->m_next); 2374105197Ssam m->m_next = NULL; 2375105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2376105197Ssam newmsg = mtod(m, struct sadb_msg *); 2377105197Ssam newmsg->sadb_msg_errno = 0; 2378105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2379105197Ssam 2380105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2381105197Ssam} 2382105197Ssam 2383105197Ssam/* 2384105197Ssam * SADB_SPDDUMP processing 2385105197Ssam * receive 2386105197Ssam * <base> 2387105197Ssam * from the user, and dump all SP leaves 2388105197Ssam * and send, 2389105197Ssam * <base> ..... 2390105197Ssam * to the ikmpd. 2391105197Ssam * 2392105197Ssam * m will always be freed. 2393105197Ssam */ 2394105197Ssamstatic int 2395105197Ssamkey_spddump(so, m, mhp) 2396105197Ssam struct socket *so; 2397105197Ssam struct mbuf *m; 2398105197Ssam const struct sadb_msghdr *mhp; 2399105197Ssam{ 2400183550Szec INIT_VNET_IPSEC(curvnet); 2401105197Ssam struct secpolicy *sp; 2402105197Ssam int cnt; 2403105197Ssam u_int dir; 2404105197Ssam struct mbuf *n; 2405105197Ssam 2406120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2407120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2408120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2409120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2410105197Ssam 2411105197Ssam /* search SPD entry and get buffer size. */ 2412105197Ssam cnt = 0; 2413105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2414181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2415105197Ssam cnt++; 2416105197Ssam } 2417105197Ssam } 2418105197Ssam 2419105197Ssam if (cnt == 0) 2420105197Ssam return key_senderror(so, m, ENOENT); 2421105197Ssam 2422105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2423181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2424105197Ssam --cnt; 2425105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2426105197Ssam mhp->msg->sadb_msg_pid); 2427105197Ssam 2428105197Ssam if (n) 2429105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2430105197Ssam } 2431105197Ssam } 2432105197Ssam 2433105197Ssam m_freem(m); 2434105197Ssam return 0; 2435105197Ssam} 2436105197Ssam 2437105197Ssamstatic struct mbuf * 2438105197Ssamkey_setdumpsp(sp, type, seq, pid) 2439105197Ssam struct secpolicy *sp; 2440105197Ssam u_int8_t type; 2441105197Ssam u_int32_t seq, pid; 2442105197Ssam{ 2443105197Ssam struct mbuf *result = NULL, *m; 2444181330Svanhu struct seclifetime lt; 2445105197Ssam 2446105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2447105197Ssam if (!m) 2448105197Ssam goto fail; 2449105197Ssam result = m; 2450105197Ssam 2451105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2452105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2453105197Ssam sp->spidx.ul_proto); 2454105197Ssam if (!m) 2455105197Ssam goto fail; 2456105197Ssam m_cat(result, m); 2457105197Ssam 2458105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2459105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2460105197Ssam sp->spidx.ul_proto); 2461105197Ssam if (!m) 2462105197Ssam goto fail; 2463105197Ssam m_cat(result, m); 2464105197Ssam 2465105197Ssam m = key_sp2msg(sp); 2466105197Ssam if (!m) 2467105197Ssam goto fail; 2468105197Ssam m_cat(result, m); 2469105197Ssam 2470181330Svanhu if(sp->lifetime){ 2471181330Svanhu lt.addtime=sp->created; 2472181330Svanhu lt.usetime= sp->lastused; 2473181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2474181330Svanhu if (!m) 2475181330Svanhu goto fail; 2476181330Svanhu m_cat(result, m); 2477181330Svanhu 2478181330Svanhu lt.addtime=sp->lifetime; 2479181330Svanhu lt.usetime= sp->validtime; 2480181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2481181330Svanhu if (!m) 2482181330Svanhu goto fail; 2483181330Svanhu m_cat(result, m); 2484181330Svanhu } 2485181330Svanhu 2486105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2487105197Ssam goto fail; 2488105197Ssam 2489105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2490105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2491105197Ssam if (result == NULL) 2492105197Ssam goto fail; 2493105197Ssam } 2494105197Ssam 2495105197Ssam result->m_pkthdr.len = 0; 2496105197Ssam for (m = result; m; m = m->m_next) 2497105197Ssam result->m_pkthdr.len += m->m_len; 2498105197Ssam 2499105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2500105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2501105197Ssam 2502105197Ssam return result; 2503105197Ssam 2504105197Ssamfail: 2505105197Ssam m_freem(result); 2506105197Ssam return NULL; 2507105197Ssam} 2508105197Ssam 2509105197Ssam/* 2510105197Ssam * get PFKEY message length for security policy and request. 2511105197Ssam */ 2512105197Ssamstatic u_int 2513105197Ssamkey_getspreqmsglen(sp) 2514105197Ssam struct secpolicy *sp; 2515105197Ssam{ 2516105197Ssam u_int tlen; 2517105197Ssam 2518105197Ssam tlen = sizeof(struct sadb_x_policy); 2519105197Ssam 2520105197Ssam /* if is the policy for ipsec ? */ 2521105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2522105197Ssam return tlen; 2523105197Ssam 2524105197Ssam /* get length of ipsec requests */ 2525105197Ssam { 2526105197Ssam struct ipsecrequest *isr; 2527105197Ssam int len; 2528105197Ssam 2529105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2530105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2531105197Ssam + isr->saidx.src.sa.sa_len 2532105197Ssam + isr->saidx.dst.sa.sa_len; 2533105197Ssam 2534105197Ssam tlen += PFKEY_ALIGN8(len); 2535105197Ssam } 2536105197Ssam } 2537105197Ssam 2538105197Ssam return tlen; 2539105197Ssam} 2540105197Ssam 2541105197Ssam/* 2542105197Ssam * SADB_SPDEXPIRE processing 2543105197Ssam * send 2544105197Ssam * <base, address(SD), lifetime(CH), policy> 2545105197Ssam * to KMD by PF_KEY. 2546105197Ssam * 2547105197Ssam * OUT: 0 : succeed 2548105197Ssam * others : error number 2549105197Ssam */ 2550105197Ssamstatic int 2551105197Ssamkey_spdexpire(sp) 2552105197Ssam struct secpolicy *sp; 2553105197Ssam{ 2554105197Ssam struct mbuf *result = NULL, *m; 2555105197Ssam int len; 2556105197Ssam int error = -1; 2557105197Ssam struct sadb_lifetime *lt; 2558105197Ssam 2559105197Ssam /* XXX: Why do we lock ? */ 2560105197Ssam 2561120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2562105197Ssam 2563105197Ssam /* set msg header */ 2564105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2565105197Ssam if (!m) { 2566105197Ssam error = ENOBUFS; 2567105197Ssam goto fail; 2568105197Ssam } 2569105197Ssam result = m; 2570105197Ssam 2571105197Ssam /* create lifetime extension (current and hard) */ 2572105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2573105197Ssam m = key_alloc_mbuf(len); 2574105197Ssam if (!m || m->m_next) { /*XXX*/ 2575105197Ssam if (m) 2576105197Ssam m_freem(m); 2577105197Ssam error = ENOBUFS; 2578105197Ssam goto fail; 2579105197Ssam } 2580105197Ssam bzero(mtod(m, caddr_t), len); 2581105197Ssam lt = mtod(m, struct sadb_lifetime *); 2582105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2583105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2584105197Ssam lt->sadb_lifetime_allocations = 0; 2585105197Ssam lt->sadb_lifetime_bytes = 0; 2586105197Ssam lt->sadb_lifetime_addtime = sp->created; 2587105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2588105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2589105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2590105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2591105197Ssam lt->sadb_lifetime_allocations = 0; 2592105197Ssam lt->sadb_lifetime_bytes = 0; 2593105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2594105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2595105197Ssam m_cat(result, m); 2596105197Ssam 2597105197Ssam /* set sadb_address for source */ 2598105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2599105197Ssam &sp->spidx.src.sa, 2600105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2601105197Ssam if (!m) { 2602105197Ssam error = ENOBUFS; 2603105197Ssam goto fail; 2604105197Ssam } 2605105197Ssam m_cat(result, m); 2606105197Ssam 2607105197Ssam /* set sadb_address for destination */ 2608105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2609105197Ssam &sp->spidx.dst.sa, 2610105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2611105197Ssam if (!m) { 2612105197Ssam error = ENOBUFS; 2613105197Ssam goto fail; 2614105197Ssam } 2615105197Ssam m_cat(result, m); 2616105197Ssam 2617105197Ssam /* set secpolicy */ 2618105197Ssam m = key_sp2msg(sp); 2619105197Ssam if (!m) { 2620105197Ssam error = ENOBUFS; 2621105197Ssam goto fail; 2622105197Ssam } 2623105197Ssam m_cat(result, m); 2624105197Ssam 2625105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2626105197Ssam error = EINVAL; 2627105197Ssam goto fail; 2628105197Ssam } 2629105197Ssam 2630105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2631105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2632105197Ssam if (result == NULL) { 2633105197Ssam error = ENOBUFS; 2634105197Ssam goto fail; 2635105197Ssam } 2636105197Ssam } 2637105197Ssam 2638105197Ssam result->m_pkthdr.len = 0; 2639105197Ssam for (m = result; m; m = m->m_next) 2640105197Ssam result->m_pkthdr.len += m->m_len; 2641105197Ssam 2642105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2643105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2644105197Ssam 2645105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2646105197Ssam 2647105197Ssam fail: 2648105197Ssam if (result) 2649105197Ssam m_freem(result); 2650105197Ssam return error; 2651105197Ssam} 2652105197Ssam 2653105197Ssam/* %%% SAD management */ 2654105197Ssam/* 2655105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2656105197Ssam * OUT: NULL : failure due to the lack of memory. 2657105197Ssam * others : pointer to new SA head. 2658105197Ssam */ 2659105197Ssamstatic struct secashead * 2660105197Ssamkey_newsah(saidx) 2661105197Ssam struct secasindex *saidx; 2662105197Ssam{ 2663183550Szec INIT_VNET_IPSEC(curvnet); 2664105197Ssam struct secashead *newsah; 2665105197Ssam 2666120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2667105197Ssam 2668119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2669105197Ssam if (newsah != NULL) { 2670105197Ssam int i; 2671105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2672105197Ssam LIST_INIT(&newsah->savtree[i]); 2673105197Ssam newsah->saidx = *saidx; 2674105197Ssam 2675105197Ssam /* add to saidxtree */ 2676105197Ssam newsah->state = SADB_SASTATE_MATURE; 2677119643Ssam 2678120585Ssam SAHTREE_LOCK(); 2679181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2680120585Ssam SAHTREE_UNLOCK(); 2681105197Ssam } 2682105197Ssam return(newsah); 2683105197Ssam} 2684105197Ssam 2685105197Ssam/* 2686105197Ssam * delete SA index and all SA registerd. 2687105197Ssam */ 2688105197Ssamstatic void 2689105197Ssamkey_delsah(sah) 2690105197Ssam struct secashead *sah; 2691105197Ssam{ 2692183550Szec INIT_VNET_IPSEC(curvnet); 2693105197Ssam struct secasvar *sav, *nextsav; 2694120585Ssam u_int stateidx; 2695105197Ssam int zombie = 0; 2696105197Ssam 2697120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2698120585Ssam SAHTREE_LOCK_ASSERT(); 2699105197Ssam 2700105197Ssam /* searching all SA registerd in the secindex. */ 2701105197Ssam for (stateidx = 0; 2702185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2703105197Ssam stateidx++) { 2704185348Szec u_int state = saorder_state_any[stateidx]; 2705120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2706105197Ssam if (sav->refcnt == 0) { 2707105197Ssam /* sanity check */ 2708120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2709105197Ssam KEY_FREESAV(&sav); 2710105197Ssam } else { 2711105197Ssam /* give up to delete this sa */ 2712105197Ssam zombie++; 2713105197Ssam } 2714105197Ssam } 2715105197Ssam } 2716120585Ssam if (!zombie) { /* delete only if there are savs */ 2717120585Ssam /* remove from tree of SA index */ 2718120585Ssam if (__LIST_CHAINED(sah)) 2719120585Ssam LIST_REMOVE(sah, chain); 2720120585Ssam if (sah->sa_route.ro_rt) { 2721120585Ssam RTFREE(sah->sa_route.ro_rt); 2722120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2723120585Ssam } 2724120585Ssam free(sah, M_IPSEC_SAH); 2725105197Ssam } 2726105197Ssam} 2727105197Ssam 2728105197Ssam/* 2729105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2730105197Ssam * and copy the values of mhp into new buffer. 2731105197Ssam * When SAD message type is GETSPI: 2732105197Ssam * to set sequence number from acq_seq++, 2733105197Ssam * to set zero to SPI. 2734105197Ssam * not to call key_setsava(). 2735105197Ssam * OUT: NULL : fail 2736105197Ssam * others : pointer to new secasvar. 2737105197Ssam * 2738105197Ssam * does not modify mbuf. does not free mbuf on error. 2739105197Ssam */ 2740105197Ssamstatic struct secasvar * 2741105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2742105197Ssam struct mbuf *m; 2743105197Ssam const struct sadb_msghdr *mhp; 2744105197Ssam struct secashead *sah; 2745105197Ssam int *errp; 2746105197Ssam const char* where; 2747105197Ssam int tag; 2748105197Ssam{ 2749183550Szec INIT_VNET_IPSEC(curvnet); 2750105197Ssam struct secasvar *newsav; 2751105197Ssam const struct sadb_sa *xsa; 2752105197Ssam 2753120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2754120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2755120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2756120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2757105197Ssam 2758119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2759105197Ssam if (newsav == NULL) { 2760120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2761105197Ssam *errp = ENOBUFS; 2762105197Ssam goto done; 2763105197Ssam } 2764105197Ssam 2765105197Ssam switch (mhp->msg->sadb_msg_type) { 2766105197Ssam case SADB_GETSPI: 2767105197Ssam newsav->spi = 0; 2768105197Ssam 2769105197Ssam#ifdef IPSEC_DOSEQCHECK 2770105197Ssam /* sync sequence number */ 2771105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2772105197Ssam newsav->seq = 2773181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2774105197Ssam else 2775105197Ssam#endif 2776105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2777105197Ssam break; 2778105197Ssam 2779105197Ssam case SADB_ADD: 2780105197Ssam /* sanity check */ 2781105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2782119643Ssam free(newsav, M_IPSEC_SA); 2783119643Ssam newsav = NULL; 2784120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2785120585Ssam __func__)); 2786105197Ssam *errp = EINVAL; 2787105197Ssam goto done; 2788105197Ssam } 2789105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2790105197Ssam newsav->spi = xsa->sadb_sa_spi; 2791105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2792105197Ssam break; 2793105197Ssam default: 2794119643Ssam free(newsav, M_IPSEC_SA); 2795119643Ssam newsav = NULL; 2796105197Ssam *errp = EINVAL; 2797105197Ssam goto done; 2798105197Ssam } 2799105197Ssam 2800119643Ssam 2801105197Ssam /* copy sav values */ 2802105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2803105197Ssam *errp = key_setsaval(newsav, m, mhp); 2804105197Ssam if (*errp) { 2805119643Ssam free(newsav, M_IPSEC_SA); 2806119643Ssam newsav = NULL; 2807105197Ssam goto done; 2808105197Ssam } 2809105197Ssam } 2810105197Ssam 2811120585Ssam SECASVAR_LOCK_INIT(newsav); 2812119643Ssam 2813105197Ssam /* reset created */ 2814105197Ssam newsav->created = time_second; 2815105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2816105197Ssam 2817105197Ssam /* add to satree */ 2818105197Ssam newsav->sah = sah; 2819158767Spjd sa_initref(newsav); 2820105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2821119643Ssam 2822119643Ssam /* XXX locking??? */ 2823105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2824105197Ssam secasvar, chain); 2825105197Ssamdone: 2826105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2827120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2828105197Ssam where, tag, newsav)); 2829105197Ssam 2830105197Ssam return newsav; 2831105197Ssam} 2832105197Ssam 2833105197Ssam/* 2834105197Ssam * free() SA variable entry. 2835105197Ssam */ 2836105197Ssamstatic void 2837119643Ssamkey_cleansav(struct secasvar *sav) 2838105197Ssam{ 2839117051Ssam /* 2840117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2841117051Ssam * keys to be cleared; otherwise we must do it ourself. 2842117051Ssam */ 2843117051Ssam if (sav->tdb_xform != NULL) { 2844117051Ssam sav->tdb_xform->xf_zeroize(sav); 2845117051Ssam sav->tdb_xform = NULL; 2846117051Ssam } else { 2847120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2848117051Ssam if (sav->key_auth != NULL) 2849157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2850117051Ssam if (sav->key_enc != NULL) 2851157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2852117051Ssam } 2853105197Ssam if (sav->key_auth != NULL) { 2854157123Sgnn if (sav->key_auth->key_data != NULL) 2855157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2856119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2857105197Ssam sav->key_auth = NULL; 2858105197Ssam } 2859105197Ssam if (sav->key_enc != NULL) { 2860157123Sgnn if (sav->key_enc->key_data != NULL) 2861157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2862119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2863105197Ssam sav->key_enc = NULL; 2864105197Ssam } 2865105197Ssam if (sav->sched) { 2866105197Ssam bzero(sav->sched, sav->schedlen); 2867119643Ssam free(sav->sched, M_IPSEC_MISC); 2868105197Ssam sav->sched = NULL; 2869105197Ssam } 2870105197Ssam if (sav->replay != NULL) { 2871119643Ssam free(sav->replay, M_IPSEC_MISC); 2872105197Ssam sav->replay = NULL; 2873105197Ssam } 2874105197Ssam if (sav->lft_c != NULL) { 2875119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2876105197Ssam sav->lft_c = NULL; 2877105197Ssam } 2878105197Ssam if (sav->lft_h != NULL) { 2879119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2880105197Ssam sav->lft_h = NULL; 2881105197Ssam } 2882105197Ssam if (sav->lft_s != NULL) { 2883119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2884105197Ssam sav->lft_s = NULL; 2885105197Ssam } 2886119643Ssam} 2887105197Ssam 2888119643Ssam/* 2889119643Ssam * free() SA variable entry. 2890119643Ssam */ 2891119643Ssamstatic void 2892119643Ssamkey_delsav(sav) 2893119643Ssam struct secasvar *sav; 2894119643Ssam{ 2895120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2896120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2897105197Ssam 2898119643Ssam /* remove from SA header */ 2899119643Ssam if (__LIST_CHAINED(sav)) 2900119643Ssam LIST_REMOVE(sav, chain); 2901119643Ssam key_cleansav(sav); 2902120585Ssam SECASVAR_LOCK_DESTROY(sav); 2903119643Ssam free(sav, M_IPSEC_SA); 2904105197Ssam} 2905105197Ssam 2906105197Ssam/* 2907105197Ssam * search SAD. 2908105197Ssam * OUT: 2909105197Ssam * NULL : not found 2910105197Ssam * others : found, pointer to a SA. 2911105197Ssam */ 2912105197Ssamstatic struct secashead * 2913105197Ssamkey_getsah(saidx) 2914105197Ssam struct secasindex *saidx; 2915105197Ssam{ 2916183550Szec INIT_VNET_IPSEC(curvnet); 2917105197Ssam struct secashead *sah; 2918105197Ssam 2919120585Ssam SAHTREE_LOCK(); 2920181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2921105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2922105197Ssam continue; 2923105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2924119643Ssam break; 2925105197Ssam } 2926120585Ssam SAHTREE_UNLOCK(); 2927105197Ssam 2928119643Ssam return sah; 2929105197Ssam} 2930105197Ssam 2931105197Ssam/* 2932105197Ssam * check not to be duplicated SPI. 2933105197Ssam * NOTE: this function is too slow due to searching all SAD. 2934105197Ssam * OUT: 2935105197Ssam * NULL : not found 2936105197Ssam * others : found, pointer to a SA. 2937105197Ssam */ 2938105197Ssamstatic struct secasvar * 2939105197Ssamkey_checkspidup(saidx, spi) 2940105197Ssam struct secasindex *saidx; 2941105197Ssam u_int32_t spi; 2942105197Ssam{ 2943183550Szec INIT_VNET_IPSEC(curvnet); 2944105197Ssam struct secashead *sah; 2945105197Ssam struct secasvar *sav; 2946105197Ssam 2947105197Ssam /* check address family */ 2948105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2949120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2950120585Ssam __func__)); 2951105197Ssam return NULL; 2952105197Ssam } 2953105197Ssam 2954119643Ssam sav = NULL; 2955105197Ssam /* check all SAD */ 2956120585Ssam SAHTREE_LOCK(); 2957181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2958105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2959105197Ssam continue; 2960105197Ssam sav = key_getsavbyspi(sah, spi); 2961105197Ssam if (sav != NULL) 2962119643Ssam break; 2963105197Ssam } 2964120585Ssam SAHTREE_UNLOCK(); 2965105197Ssam 2966119643Ssam return sav; 2967105197Ssam} 2968105197Ssam 2969105197Ssam/* 2970105197Ssam * search SAD litmited alive SA, protocol, SPI. 2971105197Ssam * OUT: 2972105197Ssam * NULL : not found 2973105197Ssam * others : found, pointer to a SA. 2974105197Ssam */ 2975105197Ssamstatic struct secasvar * 2976105197Ssamkey_getsavbyspi(sah, spi) 2977105197Ssam struct secashead *sah; 2978105197Ssam u_int32_t spi; 2979105197Ssam{ 2980183550Szec INIT_VNET_IPSEC(curvnet); 2981105197Ssam struct secasvar *sav; 2982105197Ssam u_int stateidx, state; 2983105197Ssam 2984119643Ssam sav = NULL; 2985120585Ssam SAHTREE_LOCK_ASSERT(); 2986105197Ssam /* search all status */ 2987105197Ssam for (stateidx = 0; 2988185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 2989105197Ssam stateidx++) { 2990105197Ssam 2991185348Szec state = saorder_state_alive[stateidx]; 2992105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 2993105197Ssam 2994105197Ssam /* sanity check */ 2995105197Ssam if (sav->state != state) { 2996120585Ssam ipseclog((LOG_DEBUG, "%s: " 2997105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 2998120585Ssam __func__, state, sav->state)); 2999105197Ssam continue; 3000105197Ssam } 3001105197Ssam 3002105197Ssam if (sav->spi == spi) 3003128859Ssam return sav; 3004105197Ssam } 3005105197Ssam } 3006105197Ssam 3007128859Ssam return NULL; 3008105197Ssam} 3009105197Ssam 3010105197Ssam/* 3011105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3012105197Ssam * You must update these if need. 3013105197Ssam * OUT: 0: success. 3014105197Ssam * !0: failure. 3015105197Ssam * 3016105197Ssam * does not modify mbuf. does not free mbuf on error. 3017105197Ssam */ 3018105197Ssamstatic int 3019105197Ssamkey_setsaval(sav, m, mhp) 3020105197Ssam struct secasvar *sav; 3021105197Ssam struct mbuf *m; 3022105197Ssam const struct sadb_msghdr *mhp; 3023105197Ssam{ 3024183550Szec INIT_VNET_IPSEC(curvnet); 3025105197Ssam int error = 0; 3026105197Ssam 3027120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3028120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3029120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3030105197Ssam 3031105197Ssam /* initialization */ 3032105197Ssam sav->replay = NULL; 3033105197Ssam sav->key_auth = NULL; 3034105197Ssam sav->key_enc = NULL; 3035105197Ssam sav->sched = NULL; 3036105197Ssam sav->schedlen = 0; 3037105197Ssam sav->iv = NULL; 3038105197Ssam sav->lft_c = NULL; 3039105197Ssam sav->lft_h = NULL; 3040105197Ssam sav->lft_s = NULL; 3041105197Ssam sav->tdb_xform = NULL; /* transform */ 3042105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3043105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3044105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3045105197Ssam 3046105197Ssam /* SA */ 3047105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3048105197Ssam const struct sadb_sa *sa0; 3049105197Ssam 3050105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3051105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3052105197Ssam error = EINVAL; 3053105197Ssam goto fail; 3054105197Ssam } 3055105197Ssam 3056105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3057105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3058105197Ssam sav->flags = sa0->sadb_sa_flags; 3059105197Ssam 3060105197Ssam /* replay window */ 3061105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3062105197Ssam sav->replay = (struct secreplay *) 3063119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3064105197Ssam if (sav->replay == NULL) { 3065120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3066120585Ssam __func__)); 3067105197Ssam error = ENOBUFS; 3068105197Ssam goto fail; 3069105197Ssam } 3070105197Ssam if (sa0->sadb_sa_replay != 0) 3071105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3072105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3073105197Ssam } 3074105197Ssam } 3075105197Ssam 3076105197Ssam /* Authentication keys */ 3077105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3078105197Ssam const struct sadb_key *key0; 3079105197Ssam int len; 3080105197Ssam 3081105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3082105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3083105197Ssam 3084105197Ssam error = 0; 3085105197Ssam if (len < sizeof(*key0)) { 3086105197Ssam error = EINVAL; 3087105197Ssam goto fail; 3088105197Ssam } 3089105197Ssam switch (mhp->msg->sadb_msg_satype) { 3090105197Ssam case SADB_SATYPE_AH: 3091105197Ssam case SADB_SATYPE_ESP: 3092125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3093105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3094105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3095105197Ssam error = EINVAL; 3096105197Ssam break; 3097105197Ssam case SADB_X_SATYPE_IPCOMP: 3098105197Ssam default: 3099105197Ssam error = EINVAL; 3100105197Ssam break; 3101105197Ssam } 3102105197Ssam if (error) { 3103120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3104120585Ssam __func__)); 3105105197Ssam goto fail; 3106105197Ssam } 3107105197Ssam 3108157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3109157123Sgnn M_IPSEC_MISC); 3110157123Sgnn if (sav->key_auth == NULL ) { 3111157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3112157123Sgnn __func__)); 3113105197Ssam error = ENOBUFS; 3114105197Ssam goto fail; 3115105197Ssam } 3116105197Ssam } 3117105197Ssam 3118105197Ssam /* Encryption key */ 3119105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3120105197Ssam const struct sadb_key *key0; 3121105197Ssam int len; 3122105197Ssam 3123105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3124105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3125105197Ssam 3126105197Ssam error = 0; 3127105197Ssam if (len < sizeof(*key0)) { 3128105197Ssam error = EINVAL; 3129105197Ssam goto fail; 3130105197Ssam } 3131105197Ssam switch (mhp->msg->sadb_msg_satype) { 3132105197Ssam case SADB_SATYPE_ESP: 3133105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3134105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3135105197Ssam error = EINVAL; 3136105197Ssam break; 3137105197Ssam } 3138157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3139157123Sgnn len, 3140157123Sgnn M_IPSEC_MISC); 3141105197Ssam if (sav->key_enc == NULL) { 3142120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3143120585Ssam __func__)); 3144105197Ssam error = ENOBUFS; 3145105197Ssam goto fail; 3146105197Ssam } 3147105197Ssam break; 3148105197Ssam case SADB_X_SATYPE_IPCOMP: 3149105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3150105197Ssam error = EINVAL; 3151105197Ssam sav->key_enc = NULL; /*just in case*/ 3152105197Ssam break; 3153105197Ssam case SADB_SATYPE_AH: 3154125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3155105197Ssam default: 3156105197Ssam error = EINVAL; 3157105197Ssam break; 3158105197Ssam } 3159105197Ssam if (error) { 3160120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3161120585Ssam __func__)); 3162105197Ssam goto fail; 3163105197Ssam } 3164105197Ssam } 3165105197Ssam 3166105197Ssam /* set iv */ 3167105197Ssam sav->ivlen = 0; 3168105197Ssam 3169105197Ssam switch (mhp->msg->sadb_msg_satype) { 3170105197Ssam case SADB_SATYPE_AH: 3171105197Ssam error = xform_init(sav, XF_AH); 3172105197Ssam break; 3173105197Ssam case SADB_SATYPE_ESP: 3174105197Ssam error = xform_init(sav, XF_ESP); 3175105197Ssam break; 3176105197Ssam case SADB_X_SATYPE_IPCOMP: 3177105197Ssam error = xform_init(sav, XF_IPCOMP); 3178105197Ssam break; 3179125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3180125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3181125680Sbms break; 3182105197Ssam } 3183105197Ssam if (error) { 3184120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3185120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3186105197Ssam goto fail; 3187105197Ssam } 3188105197Ssam 3189105197Ssam /* reset created */ 3190105197Ssam sav->created = time_second; 3191105197Ssam 3192105197Ssam /* make lifetime for CURRENT */ 3193176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3194105197Ssam if (sav->lft_c == NULL) { 3195120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3196105197Ssam error = ENOBUFS; 3197105197Ssam goto fail; 3198105197Ssam } 3199105197Ssam 3200157123Sgnn sav->lft_c->allocations = 0; 3201157123Sgnn sav->lft_c->bytes = 0; 3202157123Sgnn sav->lft_c->addtime = time_second; 3203157123Sgnn sav->lft_c->usetime = 0; 3204105197Ssam 3205105197Ssam /* lifetimes for HARD and SOFT */ 3206105197Ssam { 3207105197Ssam const struct sadb_lifetime *lft0; 3208105197Ssam 3209105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3210105197Ssam if (lft0 != NULL) { 3211105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3212105197Ssam error = EINVAL; 3213105197Ssam goto fail; 3214105197Ssam } 3215157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3216105197Ssam if (sav->lft_h == NULL) { 3217120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3218105197Ssam error = ENOBUFS; 3219105197Ssam goto fail; 3220105197Ssam } 3221105197Ssam /* to be initialize ? */ 3222105197Ssam } 3223105197Ssam 3224105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3225105197Ssam if (lft0 != NULL) { 3226105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3227105197Ssam error = EINVAL; 3228105197Ssam goto fail; 3229105197Ssam } 3230157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3231105197Ssam if (sav->lft_s == NULL) { 3232120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3233105197Ssam error = ENOBUFS; 3234105197Ssam goto fail; 3235105197Ssam } 3236105197Ssam /* to be initialize ? */ 3237105197Ssam } 3238105197Ssam } 3239105197Ssam 3240105197Ssam return 0; 3241105197Ssam 3242105197Ssam fail: 3243105197Ssam /* initialization */ 3244119643Ssam key_cleansav(sav); 3245105197Ssam 3246105197Ssam return error; 3247105197Ssam} 3248105197Ssam 3249105197Ssam/* 3250105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3251105197Ssam * OUT: 0: valid 3252105197Ssam * other: errno 3253105197Ssam */ 3254105197Ssamstatic int 3255119643Ssamkey_mature(struct secasvar *sav) 3256105197Ssam{ 3257183550Szec INIT_VNET_IPSEC(curvnet); 3258105197Ssam int error; 3259105197Ssam 3260105197Ssam /* check SPI value */ 3261105197Ssam switch (sav->sah->saidx.proto) { 3262105197Ssam case IPPROTO_ESP: 3263105197Ssam case IPPROTO_AH: 3264170823Sbz /* 3265170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3266170823Sbz * 1-255 reserved by IANA for future use, 3267170823Sbz * 0 for implementation specific, local use. 3268170823Sbz */ 3269170823Sbz if (ntohl(sav->spi) <= 255) { 3270120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3271120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3272105197Ssam return EINVAL; 3273105197Ssam } 3274105197Ssam break; 3275105197Ssam } 3276105197Ssam 3277105197Ssam /* check satype */ 3278105197Ssam switch (sav->sah->saidx.proto) { 3279105197Ssam case IPPROTO_ESP: 3280105197Ssam /* check flags */ 3281105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3282105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3283120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3284120585Ssam "given to old-esp.\n", __func__)); 3285105197Ssam return EINVAL; 3286105197Ssam } 3287105197Ssam error = xform_init(sav, XF_ESP); 3288105197Ssam break; 3289105197Ssam case IPPROTO_AH: 3290105197Ssam /* check flags */ 3291105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3292120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3293120585Ssam "given to AH SA.\n", __func__)); 3294105197Ssam return EINVAL; 3295105197Ssam } 3296105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3297120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3298120585Ssam "mismated.\n", __func__)); 3299105197Ssam return(EINVAL); 3300105197Ssam } 3301105197Ssam error = xform_init(sav, XF_AH); 3302105197Ssam break; 3303105197Ssam case IPPROTO_IPCOMP: 3304105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3305120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3306120585Ssam "mismated.\n", __func__)); 3307105197Ssam return(EINVAL); 3308105197Ssam } 3309105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3310105197Ssam && ntohl(sav->spi) >= 0x10000) { 3311120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3312120585Ssam __func__)); 3313105197Ssam return(EINVAL); 3314105197Ssam } 3315105197Ssam error = xform_init(sav, XF_IPCOMP); 3316105197Ssam break; 3317125680Sbms case IPPROTO_TCP: 3318125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3319125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3320125680Sbms "mismated.\n", __func__)); 3321125680Sbms return(EINVAL); 3322125680Sbms } 3323125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3324125680Sbms break; 3325105197Ssam default: 3326120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3327105197Ssam error = EPROTONOSUPPORT; 3328105197Ssam break; 3329105197Ssam } 3330119643Ssam if (error == 0) { 3331120585Ssam SAHTREE_LOCK(); 3332105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3333120585Ssam SAHTREE_UNLOCK(); 3334119643Ssam } 3335105197Ssam return (error); 3336105197Ssam} 3337105197Ssam 3338105197Ssam/* 3339105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3340105197Ssam */ 3341105197Ssamstatic struct mbuf * 3342105197Ssamkey_setdumpsa(sav, type, satype, seq, pid) 3343105197Ssam struct secasvar *sav; 3344105197Ssam u_int8_t type, satype; 3345105197Ssam u_int32_t seq, pid; 3346105197Ssam{ 3347105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3348105197Ssam int i; 3349105197Ssam int dumporder[] = { 3350105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3351105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3352105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3353105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3354105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3355105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3356105197Ssam }; 3357105197Ssam 3358105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3359105197Ssam if (m == NULL) 3360105197Ssam goto fail; 3361105197Ssam result = m; 3362105197Ssam 3363105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3364105197Ssam m = NULL; 3365105197Ssam switch (dumporder[i]) { 3366105197Ssam case SADB_EXT_SA: 3367105197Ssam m = key_setsadbsa(sav); 3368105197Ssam if (!m) 3369105197Ssam goto fail; 3370105197Ssam break; 3371105197Ssam 3372105197Ssam case SADB_X_EXT_SA2: 3373105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3374105197Ssam sav->replay ? sav->replay->count : 0, 3375105197Ssam sav->sah->saidx.reqid); 3376105197Ssam if (!m) 3377105197Ssam goto fail; 3378105197Ssam break; 3379105197Ssam 3380105197Ssam case SADB_EXT_ADDRESS_SRC: 3381105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3382105197Ssam &sav->sah->saidx.src.sa, 3383105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3384105197Ssam if (!m) 3385105197Ssam goto fail; 3386105197Ssam break; 3387105197Ssam 3388105197Ssam case SADB_EXT_ADDRESS_DST: 3389105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3390105197Ssam &sav->sah->saidx.dst.sa, 3391105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3392105197Ssam if (!m) 3393105197Ssam goto fail; 3394105197Ssam break; 3395105197Ssam 3396105197Ssam case SADB_EXT_KEY_AUTH: 3397105197Ssam if (!sav->key_auth) 3398105197Ssam continue; 3399157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3400157123Sgnn if (!m) 3401157123Sgnn goto fail; 3402105197Ssam break; 3403105197Ssam 3404105197Ssam case SADB_EXT_KEY_ENCRYPT: 3405105197Ssam if (!sav->key_enc) 3406105197Ssam continue; 3407157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3408157123Sgnn if (!m) 3409157123Sgnn goto fail; 3410105197Ssam break; 3411105197Ssam 3412105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3413105197Ssam if (!sav->lft_c) 3414105197Ssam continue; 3415157123Sgnn m = key_setlifetime(sav->lft_c, 3416157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3417157123Sgnn if (!m) 3418157123Sgnn goto fail; 3419105197Ssam break; 3420105197Ssam 3421105197Ssam case SADB_EXT_LIFETIME_HARD: 3422105197Ssam if (!sav->lft_h) 3423105197Ssam continue; 3424157123Sgnn m = key_setlifetime(sav->lft_h, 3425157123Sgnn SADB_EXT_LIFETIME_HARD); 3426157123Sgnn if (!m) 3427157123Sgnn goto fail; 3428105197Ssam break; 3429105197Ssam 3430105197Ssam case SADB_EXT_LIFETIME_SOFT: 3431105197Ssam if (!sav->lft_s) 3432105197Ssam continue; 3433177554Sbz m = key_setlifetime(sav->lft_s, 3434157123Sgnn SADB_EXT_LIFETIME_SOFT); 3435157123Sgnn 3436157123Sgnn if (!m) 3437157123Sgnn goto fail; 3438105197Ssam break; 3439105197Ssam 3440105197Ssam case SADB_EXT_ADDRESS_PROXY: 3441105197Ssam case SADB_EXT_IDENTITY_SRC: 3442105197Ssam case SADB_EXT_IDENTITY_DST: 3443105197Ssam /* XXX: should we brought from SPD ? */ 3444105197Ssam case SADB_EXT_SENSITIVITY: 3445105197Ssam default: 3446105197Ssam continue; 3447105197Ssam } 3448105197Ssam 3449157123Sgnn if (!m) 3450105197Ssam goto fail; 3451105197Ssam if (tres) 3452105197Ssam m_cat(m, tres); 3453105197Ssam tres = m; 3454157123Sgnn 3455105197Ssam } 3456105197Ssam 3457105197Ssam m_cat(result, tres); 3458105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3459105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3460105197Ssam if (result == NULL) 3461105197Ssam goto fail; 3462105197Ssam } 3463105197Ssam 3464105197Ssam result->m_pkthdr.len = 0; 3465105197Ssam for (m = result; m; m = m->m_next) 3466105197Ssam result->m_pkthdr.len += m->m_len; 3467105197Ssam 3468105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3469105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3470105197Ssam 3471105197Ssam return result; 3472105197Ssam 3473105197Ssamfail: 3474105197Ssam m_freem(result); 3475105197Ssam m_freem(tres); 3476105197Ssam return NULL; 3477105197Ssam} 3478105197Ssam 3479105197Ssam/* 3480105197Ssam * set data into sadb_msg. 3481105197Ssam */ 3482105197Ssamstatic struct mbuf * 3483105197Ssamkey_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3484105197Ssam u_int8_t type, satype; 3485105197Ssam u_int16_t tlen; 3486105197Ssam u_int32_t seq; 3487105197Ssam pid_t pid; 3488105197Ssam u_int16_t reserved; 3489105197Ssam{ 3490105197Ssam struct mbuf *m; 3491105197Ssam struct sadb_msg *p; 3492105197Ssam int len; 3493105197Ssam 3494105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3495105197Ssam if (len > MCLBYTES) 3496105197Ssam return NULL; 3497111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3498105197Ssam if (m && len > MHLEN) { 3499111119Simp MCLGET(m, M_DONTWAIT); 3500105197Ssam if ((m->m_flags & M_EXT) == 0) { 3501105197Ssam m_freem(m); 3502105197Ssam m = NULL; 3503105197Ssam } 3504105197Ssam } 3505105197Ssam if (!m) 3506105197Ssam return NULL; 3507105197Ssam m->m_pkthdr.len = m->m_len = len; 3508105197Ssam m->m_next = NULL; 3509105197Ssam 3510105197Ssam p = mtod(m, struct sadb_msg *); 3511105197Ssam 3512105197Ssam bzero(p, len); 3513105197Ssam p->sadb_msg_version = PF_KEY_V2; 3514105197Ssam p->sadb_msg_type = type; 3515105197Ssam p->sadb_msg_errno = 0; 3516105197Ssam p->sadb_msg_satype = satype; 3517105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3518105197Ssam p->sadb_msg_reserved = reserved; 3519105197Ssam p->sadb_msg_seq = seq; 3520105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3521105197Ssam 3522105197Ssam return m; 3523105197Ssam} 3524105197Ssam 3525105197Ssam/* 3526105197Ssam * copy secasvar data into sadb_address. 3527105197Ssam */ 3528105197Ssamstatic struct mbuf * 3529105197Ssamkey_setsadbsa(sav) 3530105197Ssam struct secasvar *sav; 3531105197Ssam{ 3532105197Ssam struct mbuf *m; 3533105197Ssam struct sadb_sa *p; 3534105197Ssam int len; 3535105197Ssam 3536105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3537105197Ssam m = key_alloc_mbuf(len); 3538105197Ssam if (!m || m->m_next) { /*XXX*/ 3539105197Ssam if (m) 3540105197Ssam m_freem(m); 3541105197Ssam return NULL; 3542105197Ssam } 3543105197Ssam 3544105197Ssam p = mtod(m, struct sadb_sa *); 3545105197Ssam 3546105197Ssam bzero(p, len); 3547105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3548105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3549105197Ssam p->sadb_sa_spi = sav->spi; 3550105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3551105197Ssam p->sadb_sa_state = sav->state; 3552105197Ssam p->sadb_sa_auth = sav->alg_auth; 3553105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3554105197Ssam p->sadb_sa_flags = sav->flags; 3555105197Ssam 3556105197Ssam return m; 3557105197Ssam} 3558105197Ssam 3559105197Ssam/* 3560105197Ssam * set data into sadb_address. 3561105197Ssam */ 3562105197Ssamstatic struct mbuf * 3563105197Ssamkey_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3564105197Ssam u_int16_t exttype; 3565105197Ssam const struct sockaddr *saddr; 3566105197Ssam u_int8_t prefixlen; 3567105197Ssam u_int16_t ul_proto; 3568105197Ssam{ 3569105197Ssam struct mbuf *m; 3570105197Ssam struct sadb_address *p; 3571105197Ssam size_t len; 3572105197Ssam 3573105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3574105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3575105197Ssam m = key_alloc_mbuf(len); 3576105197Ssam if (!m || m->m_next) { /*XXX*/ 3577105197Ssam if (m) 3578105197Ssam m_freem(m); 3579105197Ssam return NULL; 3580105197Ssam } 3581105197Ssam 3582105197Ssam p = mtod(m, struct sadb_address *); 3583105197Ssam 3584105197Ssam bzero(p, len); 3585105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3586105197Ssam p->sadb_address_exttype = exttype; 3587105197Ssam p->sadb_address_proto = ul_proto; 3588105197Ssam if (prefixlen == FULLMASK) { 3589105197Ssam switch (saddr->sa_family) { 3590105197Ssam case AF_INET: 3591105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3592105197Ssam break; 3593105197Ssam case AF_INET6: 3594105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3595105197Ssam break; 3596105197Ssam default: 3597105197Ssam ; /*XXX*/ 3598105197Ssam } 3599105197Ssam } 3600105197Ssam p->sadb_address_prefixlen = prefixlen; 3601105197Ssam p->sadb_address_reserved = 0; 3602105197Ssam 3603105197Ssam bcopy(saddr, 3604105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3605105197Ssam saddr->sa_len); 3606105197Ssam 3607105197Ssam return m; 3608105197Ssam} 3609105197Ssam 3610105197Ssam/* 3611105197Ssam * set data into sadb_x_sa2. 3612105197Ssam */ 3613105197Ssamstatic struct mbuf * 3614105197Ssamkey_setsadbxsa2(mode, seq, reqid) 3615105197Ssam u_int8_t mode; 3616105197Ssam u_int32_t seq, reqid; 3617105197Ssam{ 3618105197Ssam struct mbuf *m; 3619105197Ssam struct sadb_x_sa2 *p; 3620105197Ssam size_t len; 3621105197Ssam 3622105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3623105197Ssam m = key_alloc_mbuf(len); 3624105197Ssam if (!m || m->m_next) { /*XXX*/ 3625105197Ssam if (m) 3626105197Ssam m_freem(m); 3627105197Ssam return NULL; 3628105197Ssam } 3629105197Ssam 3630105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3631105197Ssam 3632105197Ssam bzero(p, len); 3633105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3634105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3635105197Ssam p->sadb_x_sa2_mode = mode; 3636105197Ssam p->sadb_x_sa2_reserved1 = 0; 3637105197Ssam p->sadb_x_sa2_reserved2 = 0; 3638105197Ssam p->sadb_x_sa2_sequence = seq; 3639105197Ssam p->sadb_x_sa2_reqid = reqid; 3640105197Ssam 3641105197Ssam return m; 3642105197Ssam} 3643105197Ssam 3644105197Ssam/* 3645105197Ssam * set data into sadb_x_policy 3646105197Ssam */ 3647105197Ssamstatic struct mbuf * 3648105197Ssamkey_setsadbxpolicy(type, dir, id) 3649105197Ssam u_int16_t type; 3650105197Ssam u_int8_t dir; 3651105197Ssam u_int32_t id; 3652105197Ssam{ 3653105197Ssam struct mbuf *m; 3654105197Ssam struct sadb_x_policy *p; 3655105197Ssam size_t len; 3656105197Ssam 3657105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3658105197Ssam m = key_alloc_mbuf(len); 3659105197Ssam if (!m || m->m_next) { /*XXX*/ 3660105197Ssam if (m) 3661105197Ssam m_freem(m); 3662105197Ssam return NULL; 3663105197Ssam } 3664105197Ssam 3665105197Ssam p = mtod(m, struct sadb_x_policy *); 3666105197Ssam 3667105197Ssam bzero(p, len); 3668105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3669105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3670105197Ssam p->sadb_x_policy_type = type; 3671105197Ssam p->sadb_x_policy_dir = dir; 3672105197Ssam p->sadb_x_policy_id = id; 3673105197Ssam 3674105197Ssam return m; 3675105197Ssam} 3676105197Ssam 3677105197Ssam/* %%% utilities */ 3678157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3679157123Sgnn * of the kernel's key structures (seckey). 3680157123Sgnn * 3681157123Sgnn * IN: pointer to the src 3682157123Sgnn * OUT: NULL no more memory 3683105197Ssam */ 3684157123Sgnnstruct seckey * 3685157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3686157123Sgnn struct malloc_type *type) 3687105197Ssam{ 3688183550Szec INIT_VNET_IPSEC(curvnet); 3689157123Sgnn struct seckey *dst; 3690157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3691157123Sgnn if (dst != NULL) { 3692157123Sgnn dst->bits = src->sadb_key_bits; 3693157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3694157123Sgnn if (dst->key_data != NULL) { 3695157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3696157123Sgnn dst->key_data, len); 3697157123Sgnn } else { 3698157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3699157123Sgnn __func__)); 3700157123Sgnn free(dst, type); 3701157123Sgnn dst = NULL; 3702157123Sgnn } 3703157123Sgnn } else { 3704157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3705157123Sgnn __func__)); 3706105197Ssam 3707157123Sgnn } 3708157123Sgnn return dst; 3709157123Sgnn} 3710157123Sgnn 3711157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3712157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3713157123Sgnn * 3714157123Sgnn * IN: pointer to the destination, source and malloc type 3715157123Sgnn * OUT: NULL, no more memory 3716157123Sgnn */ 3717157123Sgnn 3718157123Sgnnstatic struct seclifetime * 3719157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3720157123Sgnn struct malloc_type *type) 3721157123Sgnn{ 3722183550Szec INIT_VNET_IPSEC(curvnet); 3723157123Sgnn struct seclifetime *dst = NULL; 3724157123Sgnn 3725157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3726157123Sgnn type, M_NOWAIT); 3727157123Sgnn if (dst == NULL) { 3728119643Ssam /* XXX counter */ 3729120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3730157123Sgnn } else { 3731157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3732157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3733157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3734157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3735157123Sgnn } 3736157123Sgnn return dst; 3737105197Ssam} 3738105197Ssam 3739105197Ssam/* compare my own address 3740105197Ssam * OUT: 1: true, i.e. my address. 3741105197Ssam * 0: false 3742105197Ssam */ 3743105197Ssamint 3744105197Ssamkey_ismyaddr(sa) 3745105197Ssam struct sockaddr *sa; 3746105197Ssam{ 3747105197Ssam#ifdef INET 3748183550Szec INIT_VNET_INET(curvnet); 3749105197Ssam struct sockaddr_in *sin; 3750105197Ssam struct in_ifaddr *ia; 3751105197Ssam#endif 3752105197Ssam 3753120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3754105197Ssam 3755105197Ssam switch (sa->sa_family) { 3756105197Ssam#ifdef INET 3757105197Ssam case AF_INET: 3758105197Ssam sin = (struct sockaddr_in *)sa; 3759181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3760105197Ssam ia = ia->ia_link.tqe_next) 3761105197Ssam { 3762105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3763105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3764105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3765105197Ssam { 3766105197Ssam return 1; 3767105197Ssam } 3768105197Ssam } 3769105197Ssam break; 3770105197Ssam#endif 3771105197Ssam#ifdef INET6 3772105197Ssam case AF_INET6: 3773105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3774105197Ssam#endif 3775105197Ssam } 3776105197Ssam 3777105197Ssam return 0; 3778105197Ssam} 3779105197Ssam 3780105197Ssam#ifdef INET6 3781105197Ssam/* 3782105197Ssam * compare my own address for IPv6. 3783105197Ssam * 1: ours 3784105197Ssam * 0: other 3785105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3786105197Ssam */ 3787105197Ssam#include <netinet6/in6_var.h> 3788105197Ssam 3789105197Ssamstatic int 3790105197Ssamkey_ismyaddr6(sin6) 3791105197Ssam struct sockaddr_in6 *sin6; 3792105197Ssam{ 3793183550Szec INIT_VNET_INET6(curvnet); 3794105197Ssam struct in6_ifaddr *ia; 3795105197Ssam struct in6_multi *in6m; 3796105197Ssam 3797181803Sbz for (ia = V_in6_ifaddr; ia; ia = ia->ia_next) { 3798105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3799105197Ssam (struct sockaddr *)&ia->ia_addr, 0) == 0) 3800105197Ssam return 1; 3801105197Ssam 3802105197Ssam /* 3803105197Ssam * XXX Multicast 3804105197Ssam * XXX why do we care about multlicast here while we don't care 3805105197Ssam * about IPv4 multicast?? 3806105197Ssam * XXX scope 3807105197Ssam */ 3808105197Ssam in6m = NULL; 3809105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3810105197Ssam if (in6m) 3811105197Ssam return 1; 3812105197Ssam } 3813105197Ssam 3814105197Ssam /* loopback, just for safety */ 3815105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3816105197Ssam return 1; 3817105197Ssam 3818105197Ssam return 0; 3819105197Ssam} 3820105197Ssam#endif /*INET6*/ 3821105197Ssam 3822105197Ssam/* 3823105197Ssam * compare two secasindex structure. 3824105197Ssam * flag can specify to compare 2 saidxes. 3825105197Ssam * compare two secasindex structure without both mode and reqid. 3826105197Ssam * don't compare port. 3827105197Ssam * IN: 3828105197Ssam * saidx0: source, it can be in SAD. 3829105197Ssam * saidx1: object. 3830105197Ssam * OUT: 3831105197Ssam * 1 : equal 3832105197Ssam * 0 : not equal 3833105197Ssam */ 3834105197Ssamstatic int 3835105197Ssamkey_cmpsaidx( 3836105197Ssam const struct secasindex *saidx0, 3837105197Ssam const struct secasindex *saidx1, 3838105197Ssam int flag) 3839105197Ssam{ 3840105197Ssam /* sanity */ 3841105197Ssam if (saidx0 == NULL && saidx1 == NULL) 3842105197Ssam return 1; 3843105197Ssam 3844105197Ssam if (saidx0 == NULL || saidx1 == NULL) 3845105197Ssam return 0; 3846105197Ssam 3847105197Ssam if (saidx0->proto != saidx1->proto) 3848105197Ssam return 0; 3849105197Ssam 3850105197Ssam if (flag == CMP_EXACTLY) { 3851105197Ssam if (saidx0->mode != saidx1->mode) 3852105197Ssam return 0; 3853105197Ssam if (saidx0->reqid != saidx1->reqid) 3854105197Ssam return 0; 3855105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3856105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3857105197Ssam return 0; 3858105197Ssam } else { 3859105197Ssam 3860105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3861105197Ssam if (flag == CMP_MODE_REQID 3862105197Ssam ||flag == CMP_REQID) { 3863105197Ssam /* 3864105197Ssam * If reqid of SPD is non-zero, unique SA is required. 3865105197Ssam * The result must be of same reqid in this case. 3866105197Ssam */ 3867105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3868105197Ssam return 0; 3869105197Ssam } 3870105197Ssam 3871105197Ssam if (flag == CMP_MODE_REQID) { 3872105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 3873105197Ssam && saidx0->mode != saidx1->mode) 3874105197Ssam return 0; 3875105197Ssam } 3876105197Ssam 3877105197Ssam if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3878105197Ssam return 0; 3879105197Ssam } 3880105197Ssam if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 3881105197Ssam return 0; 3882105197Ssam } 3883105197Ssam } 3884105197Ssam 3885105197Ssam return 1; 3886105197Ssam} 3887105197Ssam 3888105197Ssam/* 3889105197Ssam * compare two secindex structure exactly. 3890105197Ssam * IN: 3891105197Ssam * spidx0: source, it is often in SPD. 3892105197Ssam * spidx1: object, it is often from PFKEY message. 3893105197Ssam * OUT: 3894105197Ssam * 1 : equal 3895105197Ssam * 0 : not equal 3896105197Ssam */ 3897105197Ssamstatic int 3898105197Ssamkey_cmpspidx_exactly( 3899105197Ssam struct secpolicyindex *spidx0, 3900105197Ssam struct secpolicyindex *spidx1) 3901105197Ssam{ 3902105197Ssam /* sanity */ 3903105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3904105197Ssam return 1; 3905105197Ssam 3906105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3907105197Ssam return 0; 3908105197Ssam 3909105197Ssam if (spidx0->prefs != spidx1->prefs 3910105197Ssam || spidx0->prefd != spidx1->prefd 3911105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 3912105197Ssam return 0; 3913105197Ssam 3914105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 3915105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 3916105197Ssam} 3917105197Ssam 3918105197Ssam/* 3919105197Ssam * compare two secindex structure with mask. 3920105197Ssam * IN: 3921105197Ssam * spidx0: source, it is often in SPD. 3922105197Ssam * spidx1: object, it is often from IP header. 3923105197Ssam * OUT: 3924105197Ssam * 1 : equal 3925105197Ssam * 0 : not equal 3926105197Ssam */ 3927105197Ssamstatic int 3928105197Ssamkey_cmpspidx_withmask( 3929105197Ssam struct secpolicyindex *spidx0, 3930105197Ssam struct secpolicyindex *spidx1) 3931105197Ssam{ 3932105197Ssam /* sanity */ 3933105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3934105197Ssam return 1; 3935105197Ssam 3936105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3937105197Ssam return 0; 3938105197Ssam 3939105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 3940105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 3941105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 3942105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 3943105197Ssam return 0; 3944105197Ssam 3945105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 3946105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 3947105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 3948105197Ssam return 0; 3949105197Ssam 3950105197Ssam switch (spidx0->src.sa.sa_family) { 3951105197Ssam case AF_INET: 3952105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 3953105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 3954105197Ssam return 0; 3955105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 3956105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 3957105197Ssam return 0; 3958105197Ssam break; 3959105197Ssam case AF_INET6: 3960105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 3961105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 3962105197Ssam return 0; 3963105197Ssam /* 3964105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3965105197Ssam * as a wildcard scope, which matches any scope zone ID. 3966105197Ssam */ 3967105197Ssam if (spidx0->src.sin6.sin6_scope_id && 3968105197Ssam spidx1->src.sin6.sin6_scope_id && 3969105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 3970105197Ssam return 0; 3971105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 3972105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 3973105197Ssam return 0; 3974105197Ssam break; 3975105197Ssam default: 3976105197Ssam /* XXX */ 3977105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 3978105197Ssam return 0; 3979105197Ssam break; 3980105197Ssam } 3981105197Ssam 3982105197Ssam switch (spidx0->dst.sa.sa_family) { 3983105197Ssam case AF_INET: 3984105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 3985105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 3986105197Ssam return 0; 3987105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 3988105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 3989105197Ssam return 0; 3990105197Ssam break; 3991105197Ssam case AF_INET6: 3992105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 3993105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 3994105197Ssam return 0; 3995105197Ssam /* 3996105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3997105197Ssam * as a wildcard scope, which matches any scope zone ID. 3998105197Ssam */ 3999130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 4000130928Sbms spidx1->dst.sin6.sin6_scope_id && 4001105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4002105197Ssam return 0; 4003105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4004105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4005105197Ssam return 0; 4006105197Ssam break; 4007105197Ssam default: 4008105197Ssam /* XXX */ 4009105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4010105197Ssam return 0; 4011105197Ssam break; 4012105197Ssam } 4013105197Ssam 4014105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 4015105197Ssam 4016105197Ssam return 1; 4017105197Ssam} 4018105197Ssam 4019105197Ssam/* returns 0 on match */ 4020105197Ssamstatic int 4021105197Ssamkey_sockaddrcmp( 4022105197Ssam const struct sockaddr *sa1, 4023105197Ssam const struct sockaddr *sa2, 4024105197Ssam int port) 4025105197Ssam{ 4026105197Ssam#ifdef satosin 4027105197Ssam#undef satosin 4028105197Ssam#endif 4029105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4030105197Ssam#ifdef satosin6 4031105197Ssam#undef satosin6 4032105197Ssam#endif 4033105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4034105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4035105197Ssam return 1; 4036105197Ssam 4037105197Ssam switch (sa1->sa_family) { 4038105197Ssam case AF_INET: 4039105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4040105197Ssam return 1; 4041105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4042105197Ssam satosin(sa2)->sin_addr.s_addr) { 4043105197Ssam return 1; 4044105197Ssam } 4045105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4046105197Ssam return 1; 4047105197Ssam break; 4048105197Ssam case AF_INET6: 4049105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4050105197Ssam return 1; /*EINVAL*/ 4051105197Ssam if (satosin6(sa1)->sin6_scope_id != 4052105197Ssam satosin6(sa2)->sin6_scope_id) { 4053105197Ssam return 1; 4054105197Ssam } 4055105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4056105197Ssam &satosin6(sa2)->sin6_addr)) { 4057105197Ssam return 1; 4058105197Ssam } 4059105197Ssam if (port && 4060105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4061105197Ssam return 1; 4062105197Ssam } 4063170120Sbz break; 4064105197Ssam default: 4065105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4066105197Ssam return 1; 4067105197Ssam break; 4068105197Ssam } 4069105197Ssam 4070105197Ssam return 0; 4071105197Ssam#undef satosin 4072105197Ssam#undef satosin6 4073105197Ssam} 4074105197Ssam 4075105197Ssam/* 4076105197Ssam * compare two buffers with mask. 4077105197Ssam * IN: 4078105197Ssam * addr1: source 4079105197Ssam * addr2: object 4080105197Ssam * bits: Number of bits to compare 4081105197Ssam * OUT: 4082105197Ssam * 1 : equal 4083105197Ssam * 0 : not equal 4084105197Ssam */ 4085105197Ssamstatic int 4086105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4087105197Ssam{ 4088105197Ssam const unsigned char *p1 = a1; 4089105197Ssam const unsigned char *p2 = a2; 4090105197Ssam 4091105197Ssam /* XXX: This could be considerably faster if we compare a word 4092105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4093105197Ssam 4094105197Ssam /* Handle null pointers */ 4095105197Ssam if (p1 == NULL || p2 == NULL) 4096105197Ssam return (p1 == p2); 4097105197Ssam 4098105197Ssam while (bits >= 8) { 4099105197Ssam if (*p1++ != *p2++) 4100105197Ssam return 0; 4101105197Ssam bits -= 8; 4102105197Ssam } 4103105197Ssam 4104105197Ssam if (bits > 0) { 4105105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4106105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4107105197Ssam return 0; 4108105197Ssam } 4109105197Ssam return 1; /* Match! */ 4110105197Ssam} 4111105197Ssam 4112119643Ssamstatic void 4113119643Ssamkey_flush_spd(time_t now) 4114105197Ssam{ 4115183550Szec INIT_VNET_IPSEC(curvnet); 4116120585Ssam static u_int16_t sptree_scangen = 0; 4117120585Ssam u_int16_t gen = sptree_scangen++; 4118120585Ssam struct secpolicy *sp; 4119105197Ssam u_int dir; 4120105197Ssam 4121105197Ssam /* SPD */ 4122105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4123120585Ssamrestart: 4124120585Ssam SPTREE_LOCK(); 4125181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4126120585Ssam if (sp->scangen == gen) /* previously handled */ 4127120585Ssam continue; 4128120585Ssam sp->scangen = gen; 4129105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) { 4130120585Ssam /* NB: clean entries created by key_spdflush */ 4131120585Ssam SPTREE_UNLOCK(); 4132105197Ssam KEY_FREESP(&sp); 4133120585Ssam goto restart; 4134105197Ssam } 4135105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4136105197Ssam continue; 4137105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4138105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4139105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4140120585Ssam SPTREE_UNLOCK(); 4141105197Ssam key_spdexpire(sp); 4142120585Ssam KEY_FREESP(&sp); 4143120585Ssam goto restart; 4144105197Ssam } 4145105197Ssam } 4146120585Ssam SPTREE_UNLOCK(); 4147105197Ssam } 4148119643Ssam} 4149105197Ssam 4150119643Ssamstatic void 4151119643Ssamkey_flush_sad(time_t now) 4152119643Ssam{ 4153183550Szec INIT_VNET_IPSEC(curvnet); 4154105197Ssam struct secashead *sah, *nextsah; 4155105197Ssam struct secasvar *sav, *nextsav; 4156105197Ssam 4157119643Ssam /* SAD */ 4158120585Ssam SAHTREE_LOCK(); 4159181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4160105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4161105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4162105197Ssam key_delsah(sah); 4163105197Ssam continue; 4164105197Ssam } 4165105197Ssam 4166105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4167120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4168181803Sbz if (now - sav->created > V_key_larval_lifetime) 4169105197Ssam KEY_FREESAV(&sav); 4170105197Ssam } 4171105197Ssam 4172105197Ssam /* 4173105197Ssam * check MATURE entry to start to send expire message 4174105197Ssam * whether or not. 4175105197Ssam */ 4176120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4177105197Ssam /* we don't need to check. */ 4178105197Ssam if (sav->lft_s == NULL) 4179105197Ssam continue; 4180105197Ssam 4181105197Ssam /* sanity check */ 4182105197Ssam if (sav->lft_c == NULL) { 4183120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4184120585Ssam "time, why?\n", __func__)); 4185105197Ssam continue; 4186105197Ssam } 4187105197Ssam 4188105197Ssam /* check SOFT lifetime */ 4189157123Sgnn if (sav->lft_s->addtime != 0 && 4190157123Sgnn now - sav->created > sav->lft_s->addtime) { 4191105197Ssam /* 4192105197Ssam * check SA to be used whether or not. 4193105197Ssam * when SA hasn't been used, delete it. 4194105197Ssam */ 4195157123Sgnn if (sav->lft_c->usetime == 0) { 4196105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4197105197Ssam KEY_FREESAV(&sav); 4198105197Ssam } else { 4199105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4200105197Ssam /* 4201105197Ssam * XXX If we keep to send expire 4202105197Ssam * message in the status of 4203105197Ssam * DYING. Do remove below code. 4204105197Ssam */ 4205105197Ssam key_expire(sav); 4206105197Ssam } 4207105197Ssam } 4208105197Ssam /* check SOFT lifetime by bytes */ 4209105197Ssam /* 4210105197Ssam * XXX I don't know the way to delete this SA 4211105197Ssam * when new SA is installed. Caution when it's 4212105197Ssam * installed too big lifetime by time. 4213105197Ssam */ 4214157123Sgnn else if (sav->lft_s->bytes != 0 && 4215157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4216105197Ssam 4217105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4218105197Ssam /* 4219105197Ssam * XXX If we keep to send expire 4220105197Ssam * message in the status of 4221105197Ssam * DYING. Do remove below code. 4222105197Ssam */ 4223105197Ssam key_expire(sav); 4224105197Ssam } 4225105197Ssam } 4226105197Ssam 4227105197Ssam /* check DYING entry to change status to DEAD. */ 4228120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4229105197Ssam /* we don't need to check. */ 4230105197Ssam if (sav->lft_h == NULL) 4231105197Ssam continue; 4232105197Ssam 4233105197Ssam /* sanity check */ 4234105197Ssam if (sav->lft_c == NULL) { 4235120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4236120585Ssam "time, why?\n", __func__)); 4237105197Ssam continue; 4238105197Ssam } 4239105197Ssam 4240157123Sgnn if (sav->lft_h->addtime != 0 && 4241157123Sgnn now - sav->created > sav->lft_h->addtime) { 4242105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4243105197Ssam KEY_FREESAV(&sav); 4244105197Ssam } 4245105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4246105197Ssam else if (sav->lft_s != NULL 4247157123Sgnn && sav->lft_s->addtime != 0 4248157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4249105197Ssam /* 4250105197Ssam * XXX: should be checked to be 4251105197Ssam * installed the valid SA. 4252105197Ssam */ 4253105197Ssam 4254105197Ssam /* 4255105197Ssam * If there is no SA then sending 4256105197Ssam * expire message. 4257105197Ssam */ 4258105197Ssam key_expire(sav); 4259105197Ssam } 4260105197Ssam#endif 4261105197Ssam /* check HARD lifetime by bytes */ 4262157123Sgnn else if (sav->lft_h->bytes != 0 && 4263157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4264105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4265105197Ssam KEY_FREESAV(&sav); 4266105197Ssam } 4267105197Ssam } 4268105197Ssam 4269105197Ssam /* delete entry in DEAD */ 4270120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4271105197Ssam /* sanity check */ 4272105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4273120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4274120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4275120585Ssam __func__, 4276105197Ssam SADB_SASTATE_DEAD, sav->state)); 4277105197Ssam } 4278105197Ssam /* 4279105197Ssam * do not call key_freesav() here. 4280105197Ssam * sav should already be freed, and sav->refcnt 4281105197Ssam * shows other references to sav 4282105197Ssam * (such as from SPD). 4283105197Ssam */ 4284105197Ssam } 4285105197Ssam } 4286120585Ssam SAHTREE_UNLOCK(); 4287119643Ssam} 4288105197Ssam 4289119643Ssamstatic void 4290119643Ssamkey_flush_acq(time_t now) 4291119643Ssam{ 4292183550Szec INIT_VNET_IPSEC(curvnet); 4293105197Ssam struct secacq *acq, *nextacq; 4294105197Ssam 4295119643Ssam /* ACQ tree */ 4296120585Ssam ACQ_LOCK(); 4297181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4298105197Ssam nextacq = LIST_NEXT(acq, chain); 4299181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4300105197Ssam && __LIST_CHAINED(acq)) { 4301105197Ssam LIST_REMOVE(acq, chain); 4302119643Ssam free(acq, M_IPSEC_SAQ); 4303105197Ssam } 4304105197Ssam } 4305120585Ssam ACQ_UNLOCK(); 4306119643Ssam} 4307105197Ssam 4308119643Ssamstatic void 4309119643Ssamkey_flush_spacq(time_t now) 4310119643Ssam{ 4311183550Szec INIT_VNET_IPSEC(curvnet); 4312105197Ssam struct secspacq *acq, *nextacq; 4313105197Ssam 4314119643Ssam /* SP ACQ tree */ 4315120585Ssam SPACQ_LOCK(); 4316181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4317105197Ssam nextacq = LIST_NEXT(acq, chain); 4318181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4319105197Ssam && __LIST_CHAINED(acq)) { 4320105197Ssam LIST_REMOVE(acq, chain); 4321119643Ssam free(acq, M_IPSEC_SAQ); 4322105197Ssam } 4323105197Ssam } 4324120585Ssam SPACQ_UNLOCK(); 4325119643Ssam} 4326105197Ssam 4327119643Ssam/* 4328119643Ssam * time handler. 4329119643Ssam * scanning SPD and SAD to check status for each entries, 4330119643Ssam * and do to remove or to expire. 4331119643Ssam * XXX: year 2038 problem may remain. 4332119643Ssam */ 4333119643Ssamvoid 4334119643Ssamkey_timehandler(void) 4335119643Ssam{ 4336183550Szec VNET_ITERATOR_DECL(vnet_iter); 4337119643Ssam time_t now = time_second; 4338105197Ssam 4339185348Szec VNET_LIST_RLOCK(); 4340183550Szec VNET_FOREACH(vnet_iter) { 4341183550Szec CURVNET_SET(vnet_iter); 4342183550Szec key_flush_spd(now); 4343183550Szec key_flush_sad(now); 4344183550Szec key_flush_acq(now); 4345183550Szec key_flush_spacq(now); 4346183550Szec CURVNET_RESTORE(); 4347183550Szec } 4348185348Szec VNET_LIST_RUNLOCK(); 4349119643Ssam 4350105197Ssam#ifndef IPSEC_DEBUG2 4351105197Ssam /* do exchange to tick time !! */ 4352105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4353105197Ssam#endif /* IPSEC_DEBUG2 */ 4354105197Ssam} 4355105197Ssam 4356105197Ssamu_long 4357105197Ssamkey_random() 4358105197Ssam{ 4359105197Ssam u_long value; 4360105197Ssam 4361105197Ssam key_randomfill(&value, sizeof(value)); 4362105197Ssam return value; 4363105197Ssam} 4364105197Ssam 4365105197Ssamvoid 4366105197Ssamkey_randomfill(p, l) 4367105197Ssam void *p; 4368105197Ssam size_t l; 4369105197Ssam{ 4370105197Ssam size_t n; 4371105197Ssam u_long v; 4372105197Ssam static int warn = 1; 4373105197Ssam 4374105197Ssam n = 0; 4375105197Ssam n = (size_t)read_random(p, (u_int)l); 4376105197Ssam /* last resort */ 4377105197Ssam while (n < l) { 4378105197Ssam v = random(); 4379105197Ssam bcopy(&v, (u_int8_t *)p + n, 4380105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4381105197Ssam n += sizeof(v); 4382105197Ssam 4383105197Ssam if (warn) { 4384105197Ssam printf("WARNING: pseudo-random number generator " 4385105197Ssam "used for IPsec processing\n"); 4386105197Ssam warn = 0; 4387105197Ssam } 4388105197Ssam } 4389105197Ssam} 4390105197Ssam 4391105197Ssam/* 4392105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4393105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4394105197Ssam * OUT: 4395105197Ssam * 0: invalid satype. 4396105197Ssam */ 4397105197Ssamstatic u_int16_t 4398105197Ssamkey_satype2proto(satype) 4399105197Ssam u_int8_t satype; 4400105197Ssam{ 4401105197Ssam switch (satype) { 4402105197Ssam case SADB_SATYPE_UNSPEC: 4403105197Ssam return IPSEC_PROTO_ANY; 4404105197Ssam case SADB_SATYPE_AH: 4405105197Ssam return IPPROTO_AH; 4406105197Ssam case SADB_SATYPE_ESP: 4407105197Ssam return IPPROTO_ESP; 4408105197Ssam case SADB_X_SATYPE_IPCOMP: 4409105197Ssam return IPPROTO_IPCOMP; 4410125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4411125680Sbms return IPPROTO_TCP; 4412105197Ssam default: 4413105197Ssam return 0; 4414105197Ssam } 4415105197Ssam /* NOTREACHED */ 4416105197Ssam} 4417105197Ssam 4418105197Ssam/* 4419105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4420105197Ssam * OUT: 4421105197Ssam * 0: invalid protocol type. 4422105197Ssam */ 4423105197Ssamstatic u_int8_t 4424105197Ssamkey_proto2satype(proto) 4425105197Ssam u_int16_t proto; 4426105197Ssam{ 4427105197Ssam switch (proto) { 4428105197Ssam case IPPROTO_AH: 4429105197Ssam return SADB_SATYPE_AH; 4430105197Ssam case IPPROTO_ESP: 4431105197Ssam return SADB_SATYPE_ESP; 4432105197Ssam case IPPROTO_IPCOMP: 4433105197Ssam return SADB_X_SATYPE_IPCOMP; 4434125680Sbms case IPPROTO_TCP: 4435125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4436105197Ssam default: 4437105197Ssam return 0; 4438105197Ssam } 4439105197Ssam /* NOTREACHED */ 4440105197Ssam} 4441105197Ssam 4442105197Ssam/* %%% PF_KEY */ 4443105197Ssam/* 4444105197Ssam * SADB_GETSPI processing is to receive 4445105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4446105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4447105197Ssam * tree with the status of LARVAL, and send 4448105197Ssam * <base, SA(*), address(SD)> 4449105197Ssam * to the IKMPd. 4450105197Ssam * 4451105197Ssam * IN: mhp: pointer to the pointer to each header. 4452105197Ssam * OUT: NULL if fail. 4453105197Ssam * other if success, return pointer to the message to send. 4454105197Ssam */ 4455105197Ssamstatic int 4456105197Ssamkey_getspi(so, m, mhp) 4457105197Ssam struct socket *so; 4458105197Ssam struct mbuf *m; 4459105197Ssam const struct sadb_msghdr *mhp; 4460105197Ssam{ 4461183550Szec INIT_VNET_IPSEC(curvnet); 4462105197Ssam struct sadb_address *src0, *dst0; 4463105197Ssam struct secasindex saidx; 4464105197Ssam struct secashead *newsah; 4465105197Ssam struct secasvar *newsav; 4466105197Ssam u_int8_t proto; 4467105197Ssam u_int32_t spi; 4468105197Ssam u_int8_t mode; 4469105197Ssam u_int32_t reqid; 4470105197Ssam int error; 4471105197Ssam 4472120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4473120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4474120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4475120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4476105197Ssam 4477105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4478105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4479120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4480120585Ssam __func__)); 4481105197Ssam return key_senderror(so, m, EINVAL); 4482105197Ssam } 4483105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4484105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4485120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4486120585Ssam __func__)); 4487105197Ssam return key_senderror(so, m, EINVAL); 4488105197Ssam } 4489105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4490105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4491105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4492105197Ssam } else { 4493105197Ssam mode = IPSEC_MODE_ANY; 4494105197Ssam reqid = 0; 4495105197Ssam } 4496105197Ssam 4497105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4498105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4499105197Ssam 4500105197Ssam /* map satype to proto */ 4501105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4502120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4503120585Ssam __func__)); 4504105197Ssam return key_senderror(so, m, EINVAL); 4505105197Ssam } 4506105197Ssam 4507105197Ssam /* make sure if port number is zero. */ 4508105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4509105197Ssam case AF_INET: 4510105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4511105197Ssam sizeof(struct sockaddr_in)) 4512105197Ssam return key_senderror(so, m, EINVAL); 4513105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4514105197Ssam break; 4515105197Ssam case AF_INET6: 4516105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4517105197Ssam sizeof(struct sockaddr_in6)) 4518105197Ssam return key_senderror(so, m, EINVAL); 4519105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4520105197Ssam break; 4521105197Ssam default: 4522105197Ssam ; /*???*/ 4523105197Ssam } 4524105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4525105197Ssam case AF_INET: 4526105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4527105197Ssam sizeof(struct sockaddr_in)) 4528105197Ssam return key_senderror(so, m, EINVAL); 4529105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4530105197Ssam break; 4531105197Ssam case AF_INET6: 4532105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4533105197Ssam sizeof(struct sockaddr_in6)) 4534105197Ssam return key_senderror(so, m, EINVAL); 4535105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4536105197Ssam break; 4537105197Ssam default: 4538105197Ssam ; /*???*/ 4539105197Ssam } 4540105197Ssam 4541105197Ssam /* XXX boundary check against sa_len */ 4542105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4543105197Ssam 4544105197Ssam /* SPI allocation */ 4545105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4546105197Ssam &saidx); 4547105197Ssam if (spi == 0) 4548105197Ssam return key_senderror(so, m, EINVAL); 4549105197Ssam 4550105197Ssam /* get a SA index */ 4551105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4552105197Ssam /* create a new SA index */ 4553105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4554120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4555105197Ssam return key_senderror(so, m, ENOBUFS); 4556105197Ssam } 4557105197Ssam } 4558105197Ssam 4559105197Ssam /* get a new SA */ 4560105197Ssam /* XXX rewrite */ 4561105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4562105197Ssam if (newsav == NULL) { 4563105197Ssam /* XXX don't free new SA index allocated in above. */ 4564105197Ssam return key_senderror(so, m, error); 4565105197Ssam } 4566105197Ssam 4567105197Ssam /* set spi */ 4568105197Ssam newsav->spi = htonl(spi); 4569105197Ssam 4570105197Ssam /* delete the entry in acqtree */ 4571105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4572105197Ssam struct secacq *acq; 4573105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4574105197Ssam /* reset counter in order to deletion by timehandler. */ 4575105197Ssam acq->created = time_second; 4576105197Ssam acq->count = 0; 4577105197Ssam } 4578105197Ssam } 4579105197Ssam 4580105197Ssam { 4581105197Ssam struct mbuf *n, *nn; 4582105197Ssam struct sadb_sa *m_sa; 4583105197Ssam struct sadb_msg *newmsg; 4584105197Ssam int off, len; 4585105197Ssam 4586105197Ssam /* create new sadb_msg to reply. */ 4587105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4588105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4589105197Ssam 4590111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4591105197Ssam if (len > MHLEN) { 4592111119Simp MCLGET(n, M_DONTWAIT); 4593105197Ssam if ((n->m_flags & M_EXT) == 0) { 4594105197Ssam m_freem(n); 4595105197Ssam n = NULL; 4596105197Ssam } 4597105197Ssam } 4598105197Ssam if (!n) 4599105197Ssam return key_senderror(so, m, ENOBUFS); 4600105197Ssam 4601105197Ssam n->m_len = len; 4602105197Ssam n->m_next = NULL; 4603105197Ssam off = 0; 4604105197Ssam 4605105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4606105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4607105197Ssam 4608105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4609105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4610105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4611105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4612105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4613105197Ssam 4614120585Ssam IPSEC_ASSERT(off == len, 4615120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4616105197Ssam 4617105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4618105197Ssam SADB_EXT_ADDRESS_DST); 4619105197Ssam if (!n->m_next) { 4620105197Ssam m_freem(n); 4621105197Ssam return key_senderror(so, m, ENOBUFS); 4622105197Ssam } 4623105197Ssam 4624105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4625105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4626105197Ssam if (n == NULL) 4627105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4628105197Ssam } 4629105197Ssam 4630105197Ssam n->m_pkthdr.len = 0; 4631105197Ssam for (nn = n; nn; nn = nn->m_next) 4632105197Ssam n->m_pkthdr.len += nn->m_len; 4633105197Ssam 4634105197Ssam newmsg = mtod(n, struct sadb_msg *); 4635105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4636105197Ssam newmsg->sadb_msg_errno = 0; 4637105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4638105197Ssam 4639105197Ssam m_freem(m); 4640105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4641105197Ssam } 4642105197Ssam} 4643105197Ssam 4644105197Ssam/* 4645105197Ssam * allocating new SPI 4646105197Ssam * called by key_getspi(). 4647105197Ssam * OUT: 4648105197Ssam * 0: failure. 4649105197Ssam * others: success. 4650105197Ssam */ 4651105197Ssamstatic u_int32_t 4652105197Ssamkey_do_getnewspi(spirange, saidx) 4653105197Ssam struct sadb_spirange *spirange; 4654105197Ssam struct secasindex *saidx; 4655105197Ssam{ 4656183550Szec INIT_VNET_IPSEC(curvnet); 4657105197Ssam u_int32_t newspi; 4658105197Ssam u_int32_t min, max; 4659181803Sbz int count = V_key_spi_trycnt; 4660105197Ssam 4661105197Ssam /* set spi range to allocate */ 4662105197Ssam if (spirange != NULL) { 4663105197Ssam min = spirange->sadb_spirange_min; 4664105197Ssam max = spirange->sadb_spirange_max; 4665105197Ssam } else { 4666181803Sbz min = V_key_spi_minval; 4667181803Sbz max = V_key_spi_maxval; 4668105197Ssam } 4669105197Ssam /* IPCOMP needs 2-byte SPI */ 4670105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4671105197Ssam u_int32_t t; 4672105197Ssam if (min >= 0x10000) 4673105197Ssam min = 0xffff; 4674105197Ssam if (max >= 0x10000) 4675105197Ssam max = 0xffff; 4676105197Ssam if (min > max) { 4677105197Ssam t = min; min = max; max = t; 4678105197Ssam } 4679105197Ssam } 4680105197Ssam 4681105197Ssam if (min == max) { 4682105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4683120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4684120585Ssam __func__, min)); 4685105197Ssam return 0; 4686105197Ssam } 4687105197Ssam 4688105197Ssam count--; /* taking one cost. */ 4689105197Ssam newspi = min; 4690105197Ssam 4691105197Ssam } else { 4692105197Ssam 4693105197Ssam /* init SPI */ 4694105197Ssam newspi = 0; 4695105197Ssam 4696105197Ssam /* when requesting to allocate spi ranged */ 4697105197Ssam while (count--) { 4698105197Ssam /* generate pseudo-random SPI value ranged. */ 4699105197Ssam newspi = min + (key_random() % (max - min + 1)); 4700105197Ssam 4701105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4702105197Ssam break; 4703105197Ssam } 4704105197Ssam 4705105197Ssam if (count == 0 || newspi == 0) { 4706120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4707120585Ssam __func__)); 4708105197Ssam return 0; 4709105197Ssam } 4710105197Ssam } 4711105197Ssam 4712105197Ssam /* statistics */ 4713105197Ssam keystat.getspi_count = 4714181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4715105197Ssam 4716105197Ssam return newspi; 4717105197Ssam} 4718105197Ssam 4719105197Ssam/* 4720105197Ssam * SADB_UPDATE processing 4721105197Ssam * receive 4722105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4723105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4724105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4725105197Ssam * and send 4726105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4727105197Ssam * (identity(SD),) (sensitivity)> 4728105197Ssam * to the ikmpd. 4729105197Ssam * 4730105197Ssam * m will always be freed. 4731105197Ssam */ 4732105197Ssamstatic int 4733105197Ssamkey_update(so, m, mhp) 4734105197Ssam struct socket *so; 4735105197Ssam struct mbuf *m; 4736105197Ssam const struct sadb_msghdr *mhp; 4737105197Ssam{ 4738183550Szec INIT_VNET_IPSEC(curvnet); 4739105197Ssam struct sadb_sa *sa0; 4740105197Ssam struct sadb_address *src0, *dst0; 4741105197Ssam struct secasindex saidx; 4742105197Ssam struct secashead *sah; 4743105197Ssam struct secasvar *sav; 4744105197Ssam u_int16_t proto; 4745105197Ssam u_int8_t mode; 4746105197Ssam u_int32_t reqid; 4747105197Ssam int error; 4748105197Ssam 4749120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4750120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4751120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4752120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4753105197Ssam 4754105197Ssam /* map satype to proto */ 4755105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4756120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4757120585Ssam __func__)); 4758105197Ssam return key_senderror(so, m, EINVAL); 4759105197Ssam } 4760105197Ssam 4761105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4762105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4763105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4764105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4765105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4766105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4767105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4768105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4769105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4770105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4771105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4772120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4773120585Ssam __func__)); 4774105197Ssam return key_senderror(so, m, EINVAL); 4775105197Ssam } 4776105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4777105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4778105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4779120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4780120585Ssam __func__)); 4781105197Ssam return key_senderror(so, m, EINVAL); 4782105197Ssam } 4783105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4784105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4785105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4786105197Ssam } else { 4787105197Ssam mode = IPSEC_MODE_ANY; 4788105197Ssam reqid = 0; 4789105197Ssam } 4790105197Ssam /* XXX boundary checking for other extensions */ 4791105197Ssam 4792105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4793105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4794105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4795105197Ssam 4796105197Ssam /* XXX boundary check against sa_len */ 4797105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4798105197Ssam 4799105197Ssam /* get a SA header */ 4800105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 4801120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 4802105197Ssam return key_senderror(so, m, ENOENT); 4803105197Ssam } 4804105197Ssam 4805105197Ssam /* set spidx if there */ 4806105197Ssam /* XXX rewrite */ 4807105197Ssam error = key_setident(sah, m, mhp); 4808105197Ssam if (error) 4809105197Ssam return key_senderror(so, m, error); 4810105197Ssam 4811105197Ssam /* find a SA with sequence number. */ 4812105197Ssam#ifdef IPSEC_DOSEQCHECK 4813105197Ssam if (mhp->msg->sadb_msg_seq != 0 4814105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4815120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 4816120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 4817105197Ssam return key_senderror(so, m, ENOENT); 4818105197Ssam } 4819105197Ssam#else 4820120585Ssam SAHTREE_LOCK(); 4821120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 4822120585Ssam SAHTREE_UNLOCK(); 4823120585Ssam if (sav == NULL) { 4824120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 4825120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4826105197Ssam return key_senderror(so, m, EINVAL); 4827105197Ssam } 4828105197Ssam#endif 4829105197Ssam 4830105197Ssam /* validity check */ 4831105197Ssam if (sav->sah->saidx.proto != proto) { 4832120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 4833120585Ssam "(DB=%u param=%u)\n", __func__, 4834120585Ssam sav->sah->saidx.proto, proto)); 4835105197Ssam return key_senderror(so, m, EINVAL); 4836105197Ssam } 4837105197Ssam#ifdef IPSEC_DOSEQCHECK 4838105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 4839120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 4840120585Ssam __func__, 4841105197Ssam (u_int32_t)ntohl(sav->spi), 4842105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4843105197Ssam return key_senderror(so, m, EINVAL); 4844105197Ssam } 4845105197Ssam#endif 4846105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 4847120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 4848120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 4849105197Ssam return key_senderror(so, m, EINVAL); 4850105197Ssam } 4851105197Ssam 4852105197Ssam /* copy sav values */ 4853105197Ssam error = key_setsaval(sav, m, mhp); 4854105197Ssam if (error) { 4855105197Ssam KEY_FREESAV(&sav); 4856105197Ssam return key_senderror(so, m, error); 4857105197Ssam } 4858105197Ssam 4859105197Ssam /* check SA values to be mature. */ 4860105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 4861105197Ssam KEY_FREESAV(&sav); 4862105197Ssam return key_senderror(so, m, 0); 4863105197Ssam } 4864105197Ssam 4865105197Ssam { 4866105197Ssam struct mbuf *n; 4867105197Ssam 4868105197Ssam /* set msg buf from mhp */ 4869105197Ssam n = key_getmsgbuf_x1(m, mhp); 4870105197Ssam if (n == NULL) { 4871120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4872105197Ssam return key_senderror(so, m, ENOBUFS); 4873105197Ssam } 4874105197Ssam 4875105197Ssam m_freem(m); 4876105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4877105197Ssam } 4878105197Ssam} 4879105197Ssam 4880105197Ssam/* 4881105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 4882105197Ssam * only called by key_update(). 4883105197Ssam * OUT: 4884105197Ssam * NULL : not found 4885105197Ssam * others : found, pointer to a SA. 4886105197Ssam */ 4887105197Ssam#ifdef IPSEC_DOSEQCHECK 4888105197Ssamstatic struct secasvar * 4889105197Ssamkey_getsavbyseq(sah, seq) 4890105197Ssam struct secashead *sah; 4891105197Ssam u_int32_t seq; 4892105197Ssam{ 4893105197Ssam struct secasvar *sav; 4894105197Ssam u_int state; 4895105197Ssam 4896105197Ssam state = SADB_SASTATE_LARVAL; 4897105197Ssam 4898105197Ssam /* search SAD with sequence number ? */ 4899105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 4900105197Ssam 4901120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 4902105197Ssam 4903105197Ssam if (sav->seq == seq) { 4904158767Spjd sa_addref(sav); 4905105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 4906120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 4907120585Ssam __func__, sav->refcnt, sav)); 4908105197Ssam return sav; 4909105197Ssam } 4910105197Ssam } 4911105197Ssam 4912105197Ssam return NULL; 4913105197Ssam} 4914105197Ssam#endif 4915105197Ssam 4916105197Ssam/* 4917105197Ssam * SADB_ADD processing 4918108533Sschweikh * add an entry to SA database, when received 4919105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4920105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4921105197Ssam * from the ikmpd, 4922105197Ssam * and send 4923105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4924105197Ssam * (identity(SD),) (sensitivity)> 4925105197Ssam * to the ikmpd. 4926105197Ssam * 4927105197Ssam * IGNORE identity and sensitivity messages. 4928105197Ssam * 4929105197Ssam * m will always be freed. 4930105197Ssam */ 4931105197Ssamstatic int 4932105197Ssamkey_add(so, m, mhp) 4933105197Ssam struct socket *so; 4934105197Ssam struct mbuf *m; 4935105197Ssam const struct sadb_msghdr *mhp; 4936105197Ssam{ 4937183550Szec INIT_VNET_IPSEC(curvnet); 4938105197Ssam struct sadb_sa *sa0; 4939105197Ssam struct sadb_address *src0, *dst0; 4940105197Ssam struct secasindex saidx; 4941105197Ssam struct secashead *newsah; 4942105197Ssam struct secasvar *newsav; 4943105197Ssam u_int16_t proto; 4944105197Ssam u_int8_t mode; 4945105197Ssam u_int32_t reqid; 4946105197Ssam int error; 4947105197Ssam 4948120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4949120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4950120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4951120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4952105197Ssam 4953105197Ssam /* map satype to proto */ 4954105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4955120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4956120585Ssam __func__)); 4957105197Ssam return key_senderror(so, m, EINVAL); 4958105197Ssam } 4959105197Ssam 4960105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4961105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4962105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4963105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4964105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4965105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4966105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4967105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4968105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4969105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4970105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4971120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4972120585Ssam __func__)); 4973105197Ssam return key_senderror(so, m, EINVAL); 4974105197Ssam } 4975105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4976105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4977105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4978105197Ssam /* XXX need more */ 4979120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4980120585Ssam __func__)); 4981105197Ssam return key_senderror(so, m, EINVAL); 4982105197Ssam } 4983105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4984105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4985105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4986105197Ssam } else { 4987105197Ssam mode = IPSEC_MODE_ANY; 4988105197Ssam reqid = 0; 4989105197Ssam } 4990105197Ssam 4991105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4992105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4993105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4994105197Ssam 4995105197Ssam /* XXX boundary check against sa_len */ 4996105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4997105197Ssam 4998105197Ssam /* get a SA header */ 4999105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 5000105197Ssam /* create a new SA header */ 5001105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 5002120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5003105197Ssam return key_senderror(so, m, ENOBUFS); 5004105197Ssam } 5005105197Ssam } 5006105197Ssam 5007105197Ssam /* set spidx if there */ 5008105197Ssam /* XXX rewrite */ 5009105197Ssam error = key_setident(newsah, m, mhp); 5010105197Ssam if (error) { 5011105197Ssam return key_senderror(so, m, error); 5012105197Ssam } 5013105197Ssam 5014105197Ssam /* create new SA entry. */ 5015105197Ssam /* We can create new SA only if SPI is differenct. */ 5016120585Ssam SAHTREE_LOCK(); 5017120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5018120585Ssam SAHTREE_UNLOCK(); 5019120585Ssam if (newsav != NULL) { 5020120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5021105197Ssam return key_senderror(so, m, EEXIST); 5022105197Ssam } 5023105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5024105197Ssam if (newsav == NULL) { 5025105197Ssam return key_senderror(so, m, error); 5026105197Ssam } 5027105197Ssam 5028105197Ssam /* check SA values to be mature. */ 5029105197Ssam if ((error = key_mature(newsav)) != 0) { 5030105197Ssam KEY_FREESAV(&newsav); 5031105197Ssam return key_senderror(so, m, error); 5032105197Ssam } 5033105197Ssam 5034105197Ssam /* 5035105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5036105197Ssam * in the database on success. 5037105197Ssam */ 5038105197Ssam 5039105197Ssam { 5040105197Ssam struct mbuf *n; 5041105197Ssam 5042105197Ssam /* set msg buf from mhp */ 5043105197Ssam n = key_getmsgbuf_x1(m, mhp); 5044105197Ssam if (n == NULL) { 5045120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5046105197Ssam return key_senderror(so, m, ENOBUFS); 5047105197Ssam } 5048105197Ssam 5049105197Ssam m_freem(m); 5050105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5051105197Ssam } 5052105197Ssam} 5053105197Ssam 5054105197Ssam/* m is retained */ 5055105197Ssamstatic int 5056105197Ssamkey_setident(sah, m, mhp) 5057105197Ssam struct secashead *sah; 5058105197Ssam struct mbuf *m; 5059105197Ssam const struct sadb_msghdr *mhp; 5060105197Ssam{ 5061183550Szec INIT_VNET_IPSEC(curvnet); 5062105197Ssam const struct sadb_ident *idsrc, *iddst; 5063105197Ssam int idsrclen, iddstlen; 5064105197Ssam 5065120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5066120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5067120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5068120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5069105197Ssam 5070105197Ssam /* don't make buffer if not there */ 5071105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5072105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5073105197Ssam sah->idents = NULL; 5074105197Ssam sah->identd = NULL; 5075105197Ssam return 0; 5076105197Ssam } 5077105197Ssam 5078105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5079105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5080120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5081105197Ssam return EINVAL; 5082105197Ssam } 5083105197Ssam 5084105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5085105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5086105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5087105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5088105197Ssam 5089105197Ssam /* validity check */ 5090105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5091120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5092105197Ssam return EINVAL; 5093105197Ssam } 5094105197Ssam 5095105197Ssam switch (idsrc->sadb_ident_type) { 5096105197Ssam case SADB_IDENTTYPE_PREFIX: 5097105197Ssam case SADB_IDENTTYPE_FQDN: 5098105197Ssam case SADB_IDENTTYPE_USERFQDN: 5099105197Ssam default: 5100105197Ssam /* XXX do nothing */ 5101105197Ssam sah->idents = NULL; 5102105197Ssam sah->identd = NULL; 5103105197Ssam return 0; 5104105197Ssam } 5105105197Ssam 5106105197Ssam /* make structure */ 5107157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5108105197Ssam if (sah->idents == NULL) { 5109120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5110105197Ssam return ENOBUFS; 5111105197Ssam } 5112157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5113105197Ssam if (sah->identd == NULL) { 5114119643Ssam free(sah->idents, M_IPSEC_MISC); 5115105197Ssam sah->idents = NULL; 5116120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5117105197Ssam return ENOBUFS; 5118105197Ssam } 5119157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5120157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5121105197Ssam 5122157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5123157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5124157123Sgnn 5125105197Ssam return 0; 5126105197Ssam} 5127105197Ssam 5128105197Ssam/* 5129105197Ssam * m will not be freed on return. 5130105197Ssam * it is caller's responsibility to free the result. 5131105197Ssam */ 5132105197Ssamstatic struct mbuf * 5133105197Ssamkey_getmsgbuf_x1(m, mhp) 5134105197Ssam struct mbuf *m; 5135105197Ssam const struct sadb_msghdr *mhp; 5136105197Ssam{ 5137105197Ssam struct mbuf *n; 5138105197Ssam 5139120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5140120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5141120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5142105197Ssam 5143105197Ssam /* create new sadb_msg to reply. */ 5144105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5145105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5146105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5147105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5148105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5149105197Ssam if (!n) 5150105197Ssam return NULL; 5151105197Ssam 5152105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5153105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5154105197Ssam if (n == NULL) 5155105197Ssam return NULL; 5156105197Ssam } 5157105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5158105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5159105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5160105197Ssam 5161105197Ssam return n; 5162105197Ssam} 5163105197Ssam 5164105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5165105197Ssam const struct sadb_msghdr *, u_int16_t)); 5166105197Ssam 5167105197Ssam/* 5168105197Ssam * SADB_DELETE processing 5169105197Ssam * receive 5170105197Ssam * <base, SA(*), address(SD)> 5171105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5172105197Ssam * and send, 5173105197Ssam * <base, SA(*), address(SD)> 5174105197Ssam * to the ikmpd. 5175105197Ssam * 5176105197Ssam * m will always be freed. 5177105197Ssam */ 5178105197Ssamstatic int 5179105197Ssamkey_delete(so, m, mhp) 5180105197Ssam struct socket *so; 5181105197Ssam struct mbuf *m; 5182105197Ssam const struct sadb_msghdr *mhp; 5183105197Ssam{ 5184183550Szec INIT_VNET_IPSEC(curvnet); 5185105197Ssam struct sadb_sa *sa0; 5186105197Ssam struct sadb_address *src0, *dst0; 5187105197Ssam struct secasindex saidx; 5188105197Ssam struct secashead *sah; 5189105197Ssam struct secasvar *sav = NULL; 5190105197Ssam u_int16_t proto; 5191105197Ssam 5192120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5193120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5194120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5195120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5196105197Ssam 5197105197Ssam /* map satype to proto */ 5198105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5199120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5200120585Ssam __func__)); 5201105197Ssam return key_senderror(so, m, EINVAL); 5202105197Ssam } 5203105197Ssam 5204105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5205105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5206120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5207120585Ssam __func__)); 5208105197Ssam return key_senderror(so, m, EINVAL); 5209105197Ssam } 5210105197Ssam 5211105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5212105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5213120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5214120585Ssam __func__)); 5215105197Ssam return key_senderror(so, m, EINVAL); 5216105197Ssam } 5217105197Ssam 5218105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5219105197Ssam /* 5220105197Ssam * Caller wants us to delete all non-LARVAL SAs 5221105197Ssam * that match the src/dst. This is used during 5222105197Ssam * IKE INITIAL-CONTACT. 5223105197Ssam */ 5224120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5225105197Ssam return key_delete_all(so, m, mhp, proto); 5226105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5227120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5228120585Ssam __func__)); 5229105197Ssam return key_senderror(so, m, EINVAL); 5230105197Ssam } 5231105197Ssam 5232105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5233105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5234105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5235105197Ssam 5236105197Ssam /* XXX boundary check against sa_len */ 5237105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5238105197Ssam 5239105197Ssam /* get a SA header */ 5240120585Ssam SAHTREE_LOCK(); 5241181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5242105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5243105197Ssam continue; 5244105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5245105197Ssam continue; 5246105197Ssam 5247105197Ssam /* get a SA with SPI. */ 5248105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5249105197Ssam if (sav) 5250105197Ssam break; 5251105197Ssam } 5252105197Ssam if (sah == NULL) { 5253120585Ssam SAHTREE_UNLOCK(); 5254120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5255105197Ssam return key_senderror(so, m, ENOENT); 5256105197Ssam } 5257105197Ssam 5258105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5259120585Ssam SAHTREE_UNLOCK(); 5260105197Ssam KEY_FREESAV(&sav); 5261105197Ssam 5262105197Ssam { 5263105197Ssam struct mbuf *n; 5264105197Ssam struct sadb_msg *newmsg; 5265105197Ssam 5266105197Ssam /* create new sadb_msg to reply. */ 5267105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5268105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5269105197Ssam if (!n) 5270105197Ssam return key_senderror(so, m, ENOBUFS); 5271105197Ssam 5272105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5273105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5274105197Ssam if (n == NULL) 5275105197Ssam return key_senderror(so, m, ENOBUFS); 5276105197Ssam } 5277105197Ssam newmsg = mtod(n, struct sadb_msg *); 5278105197Ssam newmsg->sadb_msg_errno = 0; 5279105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5280105197Ssam 5281105197Ssam m_freem(m); 5282105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5283105197Ssam } 5284105197Ssam} 5285105197Ssam 5286105197Ssam/* 5287105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5288105197Ssam */ 5289105197Ssamstatic int 5290105197Ssamkey_delete_all(so, m, mhp, proto) 5291105197Ssam struct socket *so; 5292105197Ssam struct mbuf *m; 5293105197Ssam const struct sadb_msghdr *mhp; 5294105197Ssam u_int16_t proto; 5295105197Ssam{ 5296183550Szec INIT_VNET_IPSEC(curvnet); 5297105197Ssam struct sadb_address *src0, *dst0; 5298105197Ssam struct secasindex saidx; 5299105197Ssam struct secashead *sah; 5300105197Ssam struct secasvar *sav, *nextsav; 5301105197Ssam u_int stateidx, state; 5302105197Ssam 5303105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5304105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5305105197Ssam 5306105197Ssam /* XXX boundary check against sa_len */ 5307105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5308105197Ssam 5309120585Ssam SAHTREE_LOCK(); 5310181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5311105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5312105197Ssam continue; 5313105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5314105197Ssam continue; 5315105197Ssam 5316105197Ssam /* Delete all non-LARVAL SAs. */ 5317105197Ssam for (stateidx = 0; 5318185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5319105197Ssam stateidx++) { 5320185348Szec state = saorder_state_alive[stateidx]; 5321105197Ssam if (state == SADB_SASTATE_LARVAL) 5322105197Ssam continue; 5323105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5324105197Ssam sav != NULL; sav = nextsav) { 5325105197Ssam nextsav = LIST_NEXT(sav, chain); 5326105197Ssam /* sanity check */ 5327105197Ssam if (sav->state != state) { 5328120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5329120585Ssam "sav->state (queue %d SA %d)\n", 5330120585Ssam __func__, state, sav->state)); 5331105197Ssam continue; 5332105197Ssam } 5333105197Ssam 5334105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5335105197Ssam KEY_FREESAV(&sav); 5336105197Ssam } 5337105197Ssam } 5338105197Ssam } 5339120585Ssam SAHTREE_UNLOCK(); 5340105197Ssam { 5341105197Ssam struct mbuf *n; 5342105197Ssam struct sadb_msg *newmsg; 5343105197Ssam 5344105197Ssam /* create new sadb_msg to reply. */ 5345105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5346105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5347105197Ssam if (!n) 5348105197Ssam return key_senderror(so, m, ENOBUFS); 5349105197Ssam 5350105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5351105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5352105197Ssam if (n == NULL) 5353105197Ssam return key_senderror(so, m, ENOBUFS); 5354105197Ssam } 5355105197Ssam newmsg = mtod(n, struct sadb_msg *); 5356105197Ssam newmsg->sadb_msg_errno = 0; 5357105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5358105197Ssam 5359105197Ssam m_freem(m); 5360105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5361105197Ssam } 5362105197Ssam} 5363105197Ssam 5364105197Ssam/* 5365105197Ssam * SADB_GET processing 5366105197Ssam * receive 5367105197Ssam * <base, SA(*), address(SD)> 5368105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5369105197Ssam * and send, 5370105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5371105197Ssam * (identity(SD),) (sensitivity)> 5372105197Ssam * to the ikmpd. 5373105197Ssam * 5374105197Ssam * m will always be freed. 5375105197Ssam */ 5376105197Ssamstatic int 5377105197Ssamkey_get(so, m, mhp) 5378105197Ssam struct socket *so; 5379105197Ssam struct mbuf *m; 5380105197Ssam const struct sadb_msghdr *mhp; 5381105197Ssam{ 5382183550Szec INIT_VNET_IPSEC(curvnet); 5383105197Ssam struct sadb_sa *sa0; 5384105197Ssam struct sadb_address *src0, *dst0; 5385105197Ssam struct secasindex saidx; 5386105197Ssam struct secashead *sah; 5387105197Ssam struct secasvar *sav = NULL; 5388105197Ssam u_int16_t proto; 5389105197Ssam 5390120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5391120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5392120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5393120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5394105197Ssam 5395105197Ssam /* map satype to proto */ 5396105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5397120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5398120585Ssam __func__)); 5399105197Ssam return key_senderror(so, m, EINVAL); 5400105197Ssam } 5401105197Ssam 5402105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5403105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5404105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5405120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5406120585Ssam __func__)); 5407105197Ssam return key_senderror(so, m, EINVAL); 5408105197Ssam } 5409105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5410105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5411105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5412120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5413120585Ssam __func__)); 5414105197Ssam return key_senderror(so, m, EINVAL); 5415105197Ssam } 5416105197Ssam 5417105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5418105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5419105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5420105197Ssam 5421105197Ssam /* XXX boundary check against sa_len */ 5422105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5423105197Ssam 5424105197Ssam /* get a SA header */ 5425120585Ssam SAHTREE_LOCK(); 5426181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5427105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5428105197Ssam continue; 5429105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5430105197Ssam continue; 5431105197Ssam 5432105197Ssam /* get a SA with SPI. */ 5433105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5434105197Ssam if (sav) 5435105197Ssam break; 5436105197Ssam } 5437120585Ssam SAHTREE_UNLOCK(); 5438105197Ssam if (sah == NULL) { 5439120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5440105197Ssam return key_senderror(so, m, ENOENT); 5441105197Ssam } 5442105197Ssam 5443105197Ssam { 5444105197Ssam struct mbuf *n; 5445105197Ssam u_int8_t satype; 5446105197Ssam 5447105197Ssam /* map proto to satype */ 5448105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5449120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5450120585Ssam __func__)); 5451105197Ssam return key_senderror(so, m, EINVAL); 5452105197Ssam } 5453105197Ssam 5454105197Ssam /* create new sadb_msg to reply. */ 5455105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5456105197Ssam mhp->msg->sadb_msg_pid); 5457105197Ssam if (!n) 5458105197Ssam return key_senderror(so, m, ENOBUFS); 5459105197Ssam 5460105197Ssam m_freem(m); 5461105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5462105197Ssam } 5463105197Ssam} 5464105197Ssam 5465105197Ssam/* XXX make it sysctl-configurable? */ 5466105197Ssamstatic void 5467105197Ssamkey_getcomb_setlifetime(comb) 5468105197Ssam struct sadb_comb *comb; 5469105197Ssam{ 5470105197Ssam 5471105197Ssam comb->sadb_comb_soft_allocations = 1; 5472105197Ssam comb->sadb_comb_hard_allocations = 1; 5473105197Ssam comb->sadb_comb_soft_bytes = 0; 5474105197Ssam comb->sadb_comb_hard_bytes = 0; 5475105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5476105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5477105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5478105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5479105197Ssam} 5480105197Ssam 5481105197Ssam/* 5482105197Ssam * XXX reorder combinations by preference 5483105197Ssam * XXX no idea if the user wants ESP authentication or not 5484105197Ssam */ 5485105197Ssamstatic struct mbuf * 5486105197Ssamkey_getcomb_esp() 5487105197Ssam{ 5488183550Szec INIT_VNET_IPSEC(curvnet); 5489105197Ssam struct sadb_comb *comb; 5490105197Ssam struct enc_xform *algo; 5491105197Ssam struct mbuf *result = NULL, *m, *n; 5492105197Ssam int encmin; 5493105197Ssam int i, off, o; 5494105197Ssam int totlen; 5495105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5496105197Ssam 5497105197Ssam m = NULL; 5498105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 5499105197Ssam algo = esp_algorithm_lookup(i); 5500105197Ssam if (algo == NULL) 5501105197Ssam continue; 5502105197Ssam 5503105197Ssam /* discard algorithms with key size smaller than system min */ 5504181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 5505105197Ssam continue; 5506181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 5507181803Sbz encmin = V_ipsec_esp_keymin; 5508105197Ssam else 5509105197Ssam encmin = _BITS(algo->minkey); 5510105197Ssam 5511181803Sbz if (V_ipsec_esp_auth) 5512105197Ssam m = key_getcomb_ah(); 5513105197Ssam else { 5514120585Ssam IPSEC_ASSERT(l <= MLEN, 5515120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5516111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5517105197Ssam if (m) { 5518105197Ssam M_ALIGN(m, l); 5519105197Ssam m->m_len = l; 5520105197Ssam m->m_next = NULL; 5521105197Ssam bzero(mtod(m, caddr_t), m->m_len); 5522105197Ssam } 5523105197Ssam } 5524105197Ssam if (!m) 5525105197Ssam goto fail; 5526105197Ssam 5527105197Ssam totlen = 0; 5528105197Ssam for (n = m; n; n = n->m_next) 5529105197Ssam totlen += n->m_len; 5530120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 5531105197Ssam 5532105197Ssam for (off = 0; off < totlen; off += l) { 5533105197Ssam n = m_pulldown(m, off, l, &o); 5534105197Ssam if (!n) { 5535105197Ssam /* m is already freed */ 5536105197Ssam goto fail; 5537105197Ssam } 5538105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5539105197Ssam bzero(comb, sizeof(*comb)); 5540105197Ssam key_getcomb_setlifetime(comb); 5541105197Ssam comb->sadb_comb_encrypt = i; 5542105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 5543105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5544105197Ssam } 5545105197Ssam 5546105197Ssam if (!result) 5547105197Ssam result = m; 5548105197Ssam else 5549105197Ssam m_cat(result, m); 5550105197Ssam } 5551105197Ssam 5552105197Ssam return result; 5553105197Ssam 5554105197Ssam fail: 5555105197Ssam if (result) 5556105197Ssam m_freem(result); 5557105197Ssam return NULL; 5558105197Ssam} 5559105197Ssam 5560105197Ssamstatic void 5561105197Ssamkey_getsizes_ah( 5562105197Ssam const struct auth_hash *ah, 5563105197Ssam int alg, 5564105197Ssam u_int16_t* min, 5565105197Ssam u_int16_t* max) 5566105197Ssam{ 5567183550Szec INIT_VNET_IPSEC(curvnet); 5568183550Szec 5569105197Ssam *min = *max = ah->keysize; 5570105197Ssam if (ah->keysize == 0) { 5571105197Ssam /* 5572105197Ssam * Transform takes arbitrary key size but algorithm 5573105197Ssam * key size is restricted. Enforce this here. 5574105197Ssam */ 5575105197Ssam switch (alg) { 5576105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 5577105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 5578105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 5579105197Ssam default: 5580120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 5581120585Ssam __func__, alg)); 5582105197Ssam break; 5583105197Ssam } 5584105197Ssam } 5585105197Ssam} 5586105197Ssam 5587105197Ssam/* 5588105197Ssam * XXX reorder combinations by preference 5589105197Ssam */ 5590105197Ssamstatic struct mbuf * 5591105197Ssamkey_getcomb_ah() 5592105197Ssam{ 5593183550Szec INIT_VNET_IPSEC(curvnet); 5594105197Ssam struct sadb_comb *comb; 5595105197Ssam struct auth_hash *algo; 5596105197Ssam struct mbuf *m; 5597105197Ssam u_int16_t minkeysize, maxkeysize; 5598105197Ssam int i; 5599105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5600105197Ssam 5601105197Ssam m = NULL; 5602105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 5603105197Ssam#if 1 5604105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 5605105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5606105197Ssam continue; 5607105197Ssam#endif 5608105197Ssam algo = ah_algorithm_lookup(i); 5609105197Ssam if (!algo) 5610105197Ssam continue; 5611105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5612105197Ssam /* discard algorithms with key size smaller than system min */ 5613181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 5614105197Ssam continue; 5615105197Ssam 5616105197Ssam if (!m) { 5617120585Ssam IPSEC_ASSERT(l <= MLEN, 5618120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5619111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5620105197Ssam if (m) { 5621105197Ssam M_ALIGN(m, l); 5622105197Ssam m->m_len = l; 5623105197Ssam m->m_next = NULL; 5624105197Ssam } 5625105197Ssam } else 5626111119Simp M_PREPEND(m, l, M_DONTWAIT); 5627105197Ssam if (!m) 5628105197Ssam return NULL; 5629105197Ssam 5630105197Ssam comb = mtod(m, struct sadb_comb *); 5631105197Ssam bzero(comb, sizeof(*comb)); 5632105197Ssam key_getcomb_setlifetime(comb); 5633105197Ssam comb->sadb_comb_auth = i; 5634105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5635105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5636105197Ssam } 5637105197Ssam 5638105197Ssam return m; 5639105197Ssam} 5640105197Ssam 5641105197Ssam/* 5642105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 5643105197Ssam * XXX reorder combinations by preference 5644105197Ssam */ 5645105197Ssamstatic struct mbuf * 5646105197Ssamkey_getcomb_ipcomp() 5647105197Ssam{ 5648105197Ssam struct sadb_comb *comb; 5649105197Ssam struct comp_algo *algo; 5650105197Ssam struct mbuf *m; 5651105197Ssam int i; 5652105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5653105197Ssam 5654105197Ssam m = NULL; 5655105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5656105197Ssam algo = ipcomp_algorithm_lookup(i); 5657105197Ssam if (!algo) 5658105197Ssam continue; 5659105197Ssam 5660105197Ssam if (!m) { 5661120585Ssam IPSEC_ASSERT(l <= MLEN, 5662120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5663111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5664105197Ssam if (m) { 5665105197Ssam M_ALIGN(m, l); 5666105197Ssam m->m_len = l; 5667105197Ssam m->m_next = NULL; 5668105197Ssam } 5669105197Ssam } else 5670111119Simp M_PREPEND(m, l, M_DONTWAIT); 5671105197Ssam if (!m) 5672105197Ssam return NULL; 5673105197Ssam 5674105197Ssam comb = mtod(m, struct sadb_comb *); 5675105197Ssam bzero(comb, sizeof(*comb)); 5676105197Ssam key_getcomb_setlifetime(comb); 5677105197Ssam comb->sadb_comb_encrypt = i; 5678105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 5679105197Ssam } 5680105197Ssam 5681105197Ssam return m; 5682105197Ssam} 5683105197Ssam 5684105197Ssam/* 5685105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 5686105197Ssam * XXX replay checking? 5687105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 5688105197Ssam */ 5689105197Ssamstatic struct mbuf * 5690105197Ssamkey_getprop(saidx) 5691105197Ssam const struct secasindex *saidx; 5692105197Ssam{ 5693105197Ssam struct sadb_prop *prop; 5694105197Ssam struct mbuf *m, *n; 5695105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5696105197Ssam int totlen; 5697105197Ssam 5698105197Ssam switch (saidx->proto) { 5699105197Ssam case IPPROTO_ESP: 5700105197Ssam m = key_getcomb_esp(); 5701105197Ssam break; 5702105197Ssam case IPPROTO_AH: 5703105197Ssam m = key_getcomb_ah(); 5704105197Ssam break; 5705105197Ssam case IPPROTO_IPCOMP: 5706105197Ssam m = key_getcomb_ipcomp(); 5707105197Ssam break; 5708105197Ssam default: 5709105197Ssam return NULL; 5710105197Ssam } 5711105197Ssam 5712105197Ssam if (!m) 5713105197Ssam return NULL; 5714111119Simp M_PREPEND(m, l, M_DONTWAIT); 5715105197Ssam if (!m) 5716105197Ssam return NULL; 5717105197Ssam 5718105197Ssam totlen = 0; 5719105197Ssam for (n = m; n; n = n->m_next) 5720105197Ssam totlen += n->m_len; 5721105197Ssam 5722105197Ssam prop = mtod(m, struct sadb_prop *); 5723105197Ssam bzero(prop, sizeof(*prop)); 5724105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5725105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5726105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 5727105197Ssam 5728105197Ssam return m; 5729105197Ssam} 5730105197Ssam 5731105197Ssam/* 5732105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5733105197Ssam * send 5734105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 5735105197Ssam * (identity(SD),) (sensitivity,) proposal> 5736105197Ssam * to KMD, and expect to receive 5737105197Ssam * <base> with SADB_ACQUIRE if error occured, 5738105197Ssam * or 5739105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5740105197Ssam * from KMD by PF_KEY. 5741105197Ssam * 5742105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 5743105197Ssam * XXX sensitivity is not supported. 5744105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5745105197Ssam * see comment for key_getcomb_ipcomp(). 5746105197Ssam * 5747105197Ssam * OUT: 5748105197Ssam * 0 : succeed 5749105197Ssam * others: error number 5750105197Ssam */ 5751105197Ssamstatic int 5752105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5753105197Ssam{ 5754183550Szec INIT_VNET_IPSEC(curvnet); 5755105197Ssam struct mbuf *result = NULL, *m; 5756105197Ssam struct secacq *newacq; 5757105197Ssam u_int8_t satype; 5758105197Ssam int error = -1; 5759105197Ssam u_int32_t seq; 5760105197Ssam 5761120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 5762105197Ssam satype = key_proto2satype(saidx->proto); 5763120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 5764105197Ssam 5765105197Ssam /* 5766105197Ssam * We never do anything about acquirng SA. There is anather 5767105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 5768105197Ssam * getting something message from IKEd. In later case, to be 5769105197Ssam * managed with ACQUIRING list. 5770105197Ssam */ 5771108533Sschweikh /* Get an entry to check whether sending message or not. */ 5772105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 5773181803Sbz if (V_key_blockacq_count < newacq->count) { 5774105197Ssam /* reset counter and do send message. */ 5775105197Ssam newacq->count = 0; 5776105197Ssam } else { 5777105197Ssam /* increment counter and do nothing. */ 5778105197Ssam newacq->count++; 5779105197Ssam return 0; 5780105197Ssam } 5781105197Ssam } else { 5782105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 5783105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 5784105197Ssam return ENOBUFS; 5785105197Ssam } 5786105197Ssam 5787105197Ssam 5788105197Ssam seq = newacq->seq; 5789105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5790105197Ssam if (!m) { 5791105197Ssam error = ENOBUFS; 5792105197Ssam goto fail; 5793105197Ssam } 5794105197Ssam result = m; 5795105197Ssam 5796105197Ssam /* set sadb_address for saidx's. */ 5797105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5798105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5799105197Ssam if (!m) { 5800105197Ssam error = ENOBUFS; 5801105197Ssam goto fail; 5802105197Ssam } 5803105197Ssam m_cat(result, m); 5804105197Ssam 5805105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5806105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5807105197Ssam if (!m) { 5808105197Ssam error = ENOBUFS; 5809105197Ssam goto fail; 5810105197Ssam } 5811105197Ssam m_cat(result, m); 5812105197Ssam 5813105197Ssam /* XXX proxy address (optional) */ 5814105197Ssam 5815105197Ssam /* set sadb_x_policy */ 5816105197Ssam if (sp) { 5817105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5818105197Ssam if (!m) { 5819105197Ssam error = ENOBUFS; 5820105197Ssam goto fail; 5821105197Ssam } 5822105197Ssam m_cat(result, m); 5823105197Ssam } 5824105197Ssam 5825105197Ssam /* XXX identity (optional) */ 5826105197Ssam#if 0 5827105197Ssam if (idexttype && fqdn) { 5828105197Ssam /* create identity extension (FQDN) */ 5829105197Ssam struct sadb_ident *id; 5830105197Ssam int fqdnlen; 5831105197Ssam 5832105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5833105197Ssam id = (struct sadb_ident *)p; 5834105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5835105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5836105197Ssam id->sadb_ident_exttype = idexttype; 5837105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5838105197Ssam bcopy(fqdn, id + 1, fqdnlen); 5839105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5840105197Ssam } 5841105197Ssam 5842105197Ssam if (idexttype) { 5843105197Ssam /* create identity extension (USERFQDN) */ 5844105197Ssam struct sadb_ident *id; 5845105197Ssam int userfqdnlen; 5846105197Ssam 5847105197Ssam if (userfqdn) { 5848105197Ssam /* +1 for terminating-NUL */ 5849105197Ssam userfqdnlen = strlen(userfqdn) + 1; 5850105197Ssam } else 5851105197Ssam userfqdnlen = 0; 5852105197Ssam id = (struct sadb_ident *)p; 5853105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5854105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5855105197Ssam id->sadb_ident_exttype = idexttype; 5856105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5857105197Ssam /* XXX is it correct? */ 5858105197Ssam if (curproc && curproc->p_cred) 5859105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 5860105197Ssam if (userfqdn && userfqdnlen) 5861105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 5862105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5863105197Ssam } 5864105197Ssam#endif 5865105197Ssam 5866105197Ssam /* XXX sensitivity (optional) */ 5867105197Ssam 5868105197Ssam /* create proposal/combination extension */ 5869105197Ssam m = key_getprop(saidx); 5870105197Ssam#if 0 5871105197Ssam /* 5872105197Ssam * spec conformant: always attach proposal/combination extension, 5873105197Ssam * the problem is that we have no way to attach it for ipcomp, 5874105197Ssam * due to the way sadb_comb is declared in RFC2367. 5875105197Ssam */ 5876105197Ssam if (!m) { 5877105197Ssam error = ENOBUFS; 5878105197Ssam goto fail; 5879105197Ssam } 5880105197Ssam m_cat(result, m); 5881105197Ssam#else 5882105197Ssam /* 5883105197Ssam * outside of spec; make proposal/combination extension optional. 5884105197Ssam */ 5885105197Ssam if (m) 5886105197Ssam m_cat(result, m); 5887105197Ssam#endif 5888105197Ssam 5889105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 5890105197Ssam error = EINVAL; 5891105197Ssam goto fail; 5892105197Ssam } 5893105197Ssam 5894105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 5895105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 5896105197Ssam if (result == NULL) { 5897105197Ssam error = ENOBUFS; 5898105197Ssam goto fail; 5899105197Ssam } 5900105197Ssam } 5901105197Ssam 5902105197Ssam result->m_pkthdr.len = 0; 5903105197Ssam for (m = result; m; m = m->m_next) 5904105197Ssam result->m_pkthdr.len += m->m_len; 5905105197Ssam 5906105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 5907105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 5908105197Ssam 5909105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 5910105197Ssam 5911105197Ssam fail: 5912105197Ssam if (result) 5913105197Ssam m_freem(result); 5914105197Ssam return error; 5915105197Ssam} 5916105197Ssam 5917105197Ssamstatic struct secacq * 5918105197Ssamkey_newacq(const struct secasindex *saidx) 5919105197Ssam{ 5920183550Szec INIT_VNET_IPSEC(curvnet); 5921105197Ssam struct secacq *newacq; 5922105197Ssam 5923105197Ssam /* get new entry */ 5924119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5925105197Ssam if (newacq == NULL) { 5926120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5927105197Ssam return NULL; 5928105197Ssam } 5929105197Ssam 5930105197Ssam /* copy secindex */ 5931105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 5932181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 5933105197Ssam newacq->created = time_second; 5934105197Ssam newacq->count = 0; 5935105197Ssam 5936119643Ssam /* add to acqtree */ 5937120585Ssam ACQ_LOCK(); 5938181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 5939120585Ssam ACQ_UNLOCK(); 5940119643Ssam 5941105197Ssam return newacq; 5942105197Ssam} 5943105197Ssam 5944105197Ssamstatic struct secacq * 5945105197Ssamkey_getacq(const struct secasindex *saidx) 5946105197Ssam{ 5947183550Szec INIT_VNET_IPSEC(curvnet); 5948105197Ssam struct secacq *acq; 5949105197Ssam 5950120585Ssam ACQ_LOCK(); 5951181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5952105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 5953119643Ssam break; 5954105197Ssam } 5955120585Ssam ACQ_UNLOCK(); 5956105197Ssam 5957119643Ssam return acq; 5958105197Ssam} 5959105197Ssam 5960105197Ssamstatic struct secacq * 5961105197Ssamkey_getacqbyseq(seq) 5962105197Ssam u_int32_t seq; 5963105197Ssam{ 5964183550Szec INIT_VNET_IPSEC(curvnet); 5965105197Ssam struct secacq *acq; 5966105197Ssam 5967120585Ssam ACQ_LOCK(); 5968181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 5969105197Ssam if (acq->seq == seq) 5970119643Ssam break; 5971105197Ssam } 5972120585Ssam ACQ_UNLOCK(); 5973105197Ssam 5974119643Ssam return acq; 5975105197Ssam} 5976105197Ssam 5977105197Ssamstatic struct secspacq * 5978105197Ssamkey_newspacq(spidx) 5979105197Ssam struct secpolicyindex *spidx; 5980105197Ssam{ 5981183550Szec INIT_VNET_IPSEC(curvnet); 5982105197Ssam struct secspacq *acq; 5983105197Ssam 5984105197Ssam /* get new entry */ 5985119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5986105197Ssam if (acq == NULL) { 5987120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5988105197Ssam return NULL; 5989105197Ssam } 5990105197Ssam 5991105197Ssam /* copy secindex */ 5992105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 5993105197Ssam acq->created = time_second; 5994105197Ssam acq->count = 0; 5995105197Ssam 5996119643Ssam /* add to spacqtree */ 5997120585Ssam SPACQ_LOCK(); 5998181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 5999120585Ssam SPACQ_UNLOCK(); 6000119643Ssam 6001105197Ssam return acq; 6002105197Ssam} 6003105197Ssam 6004105197Ssamstatic struct secspacq * 6005105197Ssamkey_getspacq(spidx) 6006105197Ssam struct secpolicyindex *spidx; 6007105197Ssam{ 6008183550Szec INIT_VNET_IPSEC(curvnet); 6009105197Ssam struct secspacq *acq; 6010105197Ssam 6011120585Ssam SPACQ_LOCK(); 6012181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 6013119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6014119643Ssam /* NB: return holding spacq_lock */ 6015105197Ssam return acq; 6016119643Ssam } 6017105197Ssam } 6018120585Ssam SPACQ_UNLOCK(); 6019105197Ssam 6020105197Ssam return NULL; 6021105197Ssam} 6022105197Ssam 6023105197Ssam/* 6024105197Ssam * SADB_ACQUIRE processing, 6025105197Ssam * in first situation, is receiving 6026105197Ssam * <base> 6027105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 6028105197Ssam * 6029105197Ssam * In second situation, is receiving 6030105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6031105197Ssam * from a user land process, and return 6032105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6033105197Ssam * to the socket. 6034105197Ssam * 6035105197Ssam * m will always be freed. 6036105197Ssam */ 6037105197Ssamstatic int 6038105197Ssamkey_acquire2(so, m, mhp) 6039105197Ssam struct socket *so; 6040105197Ssam struct mbuf *m; 6041105197Ssam const struct sadb_msghdr *mhp; 6042105197Ssam{ 6043183550Szec INIT_VNET_IPSEC(curvnet); 6044105197Ssam const struct sadb_address *src0, *dst0; 6045105197Ssam struct secasindex saidx; 6046105197Ssam struct secashead *sah; 6047105197Ssam u_int16_t proto; 6048105197Ssam int error; 6049105197Ssam 6050120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6051120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6052120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6053120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6054105197Ssam 6055105197Ssam /* 6056105197Ssam * Error message from KMd. 6057105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6058105197Ssam * message is equal to the size of sadb_msg structure. 6059105197Ssam * We do not raise error even if error occured in this function. 6060105197Ssam */ 6061105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6062105197Ssam struct secacq *acq; 6063105197Ssam 6064105197Ssam /* check sequence number */ 6065105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6066120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6067120585Ssam "number.\n", __func__)); 6068105197Ssam m_freem(m); 6069105197Ssam return 0; 6070105197Ssam } 6071105197Ssam 6072105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6073105197Ssam /* 6074105197Ssam * the specified larval SA is already gone, or we got 6075105197Ssam * a bogus sequence number. we can silently ignore it. 6076105197Ssam */ 6077105197Ssam m_freem(m); 6078105197Ssam return 0; 6079105197Ssam } 6080105197Ssam 6081105197Ssam /* reset acq counter in order to deletion by timehander. */ 6082105197Ssam acq->created = time_second; 6083105197Ssam acq->count = 0; 6084105197Ssam m_freem(m); 6085105197Ssam return 0; 6086105197Ssam } 6087105197Ssam 6088105197Ssam /* 6089105197Ssam * This message is from user land. 6090105197Ssam */ 6091105197Ssam 6092105197Ssam /* map satype to proto */ 6093105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6094120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6095120585Ssam __func__)); 6096105197Ssam return key_senderror(so, m, EINVAL); 6097105197Ssam } 6098105197Ssam 6099105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6100105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6101105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6102105197Ssam /* error */ 6103120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6104120585Ssam __func__)); 6105105197Ssam return key_senderror(so, m, EINVAL); 6106105197Ssam } 6107105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6108105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6109105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6110105197Ssam /* error */ 6111120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6112120585Ssam __func__)); 6113105197Ssam return key_senderror(so, m, EINVAL); 6114105197Ssam } 6115105197Ssam 6116105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6117105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6118105197Ssam 6119105197Ssam /* XXX boundary check against sa_len */ 6120105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6121105197Ssam 6122105197Ssam /* get a SA index */ 6123120585Ssam SAHTREE_LOCK(); 6124181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6125105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6126105197Ssam continue; 6127105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6128105197Ssam break; 6129105197Ssam } 6130120585Ssam SAHTREE_UNLOCK(); 6131105197Ssam if (sah != NULL) { 6132120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6133105197Ssam return key_senderror(so, m, EEXIST); 6134105197Ssam } 6135105197Ssam 6136105197Ssam error = key_acquire(&saidx, NULL); 6137105197Ssam if (error != 0) { 6138120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6139120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6140105197Ssam return key_senderror(so, m, error); 6141105197Ssam } 6142105197Ssam 6143105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6144105197Ssam} 6145105197Ssam 6146105197Ssam/* 6147105197Ssam * SADB_REGISTER processing. 6148105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6149105197Ssam * receive 6150105197Ssam * <base> 6151105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6152105197Ssam * and send 6153105197Ssam * <base, supported> 6154105197Ssam * to KMD by PF_KEY. 6155105197Ssam * If socket is detached, must free from regnode. 6156105197Ssam * 6157105197Ssam * m will always be freed. 6158105197Ssam */ 6159105197Ssamstatic int 6160105197Ssamkey_register(so, m, mhp) 6161105197Ssam struct socket *so; 6162105197Ssam struct mbuf *m; 6163105197Ssam const struct sadb_msghdr *mhp; 6164105197Ssam{ 6165183550Szec INIT_VNET_IPSEC(curvnet); 6166105197Ssam struct secreg *reg, *newreg = 0; 6167105197Ssam 6168120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6169120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6170120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6171120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6172105197Ssam 6173105197Ssam /* check for invalid register message */ 6174181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6175105197Ssam return key_senderror(so, m, EINVAL); 6176105197Ssam 6177105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6178105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6179105197Ssam goto setmsg; 6180105197Ssam 6181105197Ssam /* check whether existing or not */ 6182120585Ssam REGTREE_LOCK(); 6183181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6184105197Ssam if (reg->so == so) { 6185120585Ssam REGTREE_UNLOCK(); 6186120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6187120585Ssam __func__)); 6188105197Ssam return key_senderror(so, m, EEXIST); 6189105197Ssam } 6190105197Ssam } 6191105197Ssam 6192105197Ssam /* create regnode */ 6193119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6194105197Ssam if (newreg == NULL) { 6195120585Ssam REGTREE_UNLOCK(); 6196120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6197105197Ssam return key_senderror(so, m, ENOBUFS); 6198105197Ssam } 6199105197Ssam 6200105197Ssam newreg->so = so; 6201105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6202105197Ssam 6203105197Ssam /* add regnode to regtree. */ 6204181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6205120585Ssam REGTREE_UNLOCK(); 6206105197Ssam 6207105197Ssam setmsg: 6208105197Ssam { 6209105197Ssam struct mbuf *n; 6210105197Ssam struct sadb_msg *newmsg; 6211105197Ssam struct sadb_supported *sup; 6212105197Ssam u_int len, alen, elen; 6213105197Ssam int off; 6214105197Ssam int i; 6215105197Ssam struct sadb_alg *alg; 6216105197Ssam 6217105197Ssam /* create new sadb_msg to reply. */ 6218105197Ssam alen = 0; 6219105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6220105197Ssam if (ah_algorithm_lookup(i)) 6221105197Ssam alen += sizeof(struct sadb_alg); 6222105197Ssam } 6223105197Ssam if (alen) 6224105197Ssam alen += sizeof(struct sadb_supported); 6225105197Ssam elen = 0; 6226105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6227105197Ssam if (esp_algorithm_lookup(i)) 6228105197Ssam elen += sizeof(struct sadb_alg); 6229105197Ssam } 6230105197Ssam if (elen) 6231105197Ssam elen += sizeof(struct sadb_supported); 6232105197Ssam 6233105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6234105197Ssam 6235105197Ssam if (len > MCLBYTES) 6236105197Ssam return key_senderror(so, m, ENOBUFS); 6237105197Ssam 6238111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6239105197Ssam if (len > MHLEN) { 6240111119Simp MCLGET(n, M_DONTWAIT); 6241105197Ssam if ((n->m_flags & M_EXT) == 0) { 6242105197Ssam m_freem(n); 6243105197Ssam n = NULL; 6244105197Ssam } 6245105197Ssam } 6246105197Ssam if (!n) 6247105197Ssam return key_senderror(so, m, ENOBUFS); 6248105197Ssam 6249105197Ssam n->m_pkthdr.len = n->m_len = len; 6250105197Ssam n->m_next = NULL; 6251105197Ssam off = 0; 6252105197Ssam 6253105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6254105197Ssam newmsg = mtod(n, struct sadb_msg *); 6255105197Ssam newmsg->sadb_msg_errno = 0; 6256105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6257105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6258105197Ssam 6259105197Ssam /* for authentication algorithm */ 6260105197Ssam if (alen) { 6261105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6262105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6263105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6264105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6265105197Ssam 6266105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6267105197Ssam struct auth_hash *aalgo; 6268105197Ssam u_int16_t minkeysize, maxkeysize; 6269105197Ssam 6270105197Ssam aalgo = ah_algorithm_lookup(i); 6271105197Ssam if (!aalgo) 6272105197Ssam continue; 6273105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6274105197Ssam alg->sadb_alg_id = i; 6275105197Ssam alg->sadb_alg_ivlen = 0; 6276105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6277105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6278105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6279105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6280105197Ssam } 6281105197Ssam } 6282105197Ssam 6283105197Ssam /* for encryption algorithm */ 6284105197Ssam if (elen) { 6285105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6286105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6287105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6288105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6289105197Ssam 6290105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6291105197Ssam struct enc_xform *ealgo; 6292105197Ssam 6293105197Ssam ealgo = esp_algorithm_lookup(i); 6294105197Ssam if (!ealgo) 6295105197Ssam continue; 6296105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6297105197Ssam alg->sadb_alg_id = i; 6298105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6299105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6300105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6301105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6302105197Ssam } 6303105197Ssam } 6304105197Ssam 6305120585Ssam IPSEC_ASSERT(off == len, 6306120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6307105197Ssam 6308105197Ssam m_freem(m); 6309105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6310105197Ssam } 6311105197Ssam} 6312105197Ssam 6313105197Ssam/* 6314105197Ssam * free secreg entry registered. 6315105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6316105197Ssam */ 6317105197Ssamvoid 6318119643Ssamkey_freereg(struct socket *so) 6319105197Ssam{ 6320183550Szec INIT_VNET_IPSEC(curvnet); 6321105197Ssam struct secreg *reg; 6322105197Ssam int i; 6323105197Ssam 6324120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6325105197Ssam 6326105197Ssam /* 6327105197Ssam * check whether existing or not. 6328105197Ssam * check all type of SA, because there is a potential that 6329105197Ssam * one socket is registered to multiple type of SA. 6330105197Ssam */ 6331120585Ssam REGTREE_LOCK(); 6332105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6333181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6334119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6335105197Ssam LIST_REMOVE(reg, chain); 6336119643Ssam free(reg, M_IPSEC_SAR); 6337105197Ssam break; 6338105197Ssam } 6339105197Ssam } 6340105197Ssam } 6341120585Ssam REGTREE_UNLOCK(); 6342105197Ssam} 6343105197Ssam 6344105197Ssam/* 6345105197Ssam * SADB_EXPIRE processing 6346105197Ssam * send 6347105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6348105197Ssam * to KMD by PF_KEY. 6349105197Ssam * NOTE: We send only soft lifetime extension. 6350105197Ssam * 6351105197Ssam * OUT: 0 : succeed 6352105197Ssam * others : error number 6353105197Ssam */ 6354105197Ssamstatic int 6355119643Ssamkey_expire(struct secasvar *sav) 6356105197Ssam{ 6357105197Ssam int s; 6358105197Ssam int satype; 6359105197Ssam struct mbuf *result = NULL, *m; 6360105197Ssam int len; 6361105197Ssam int error = -1; 6362105197Ssam struct sadb_lifetime *lt; 6363105197Ssam 6364105197Ssam /* XXX: Why do we lock ? */ 6365105197Ssam s = splnet(); /*called from softclock()*/ 6366105197Ssam 6367120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6368120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6369105197Ssam 6370105197Ssam /* set msg header */ 6371120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6372120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6373105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6374105197Ssam if (!m) { 6375105197Ssam error = ENOBUFS; 6376105197Ssam goto fail; 6377105197Ssam } 6378105197Ssam result = m; 6379105197Ssam 6380105197Ssam /* create SA extension */ 6381105197Ssam m = key_setsadbsa(sav); 6382105197Ssam if (!m) { 6383105197Ssam error = ENOBUFS; 6384105197Ssam goto fail; 6385105197Ssam } 6386105197Ssam m_cat(result, m); 6387105197Ssam 6388105197Ssam /* create SA extension */ 6389105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6390105197Ssam sav->replay ? sav->replay->count : 0, 6391105197Ssam sav->sah->saidx.reqid); 6392105197Ssam if (!m) { 6393105197Ssam error = ENOBUFS; 6394105197Ssam goto fail; 6395105197Ssam } 6396105197Ssam m_cat(result, m); 6397105197Ssam 6398105197Ssam /* create lifetime extension (current and soft) */ 6399105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6400105197Ssam m = key_alloc_mbuf(len); 6401105197Ssam if (!m || m->m_next) { /*XXX*/ 6402105197Ssam if (m) 6403105197Ssam m_freem(m); 6404105197Ssam error = ENOBUFS; 6405105197Ssam goto fail; 6406105197Ssam } 6407105197Ssam bzero(mtod(m, caddr_t), len); 6408105197Ssam lt = mtod(m, struct sadb_lifetime *); 6409105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6410105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6411157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6412157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6413157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6414157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6415105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6416176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6417176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6418176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6419176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6420176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6421176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6422105197Ssam m_cat(result, m); 6423105197Ssam 6424105197Ssam /* set sadb_address for source */ 6425105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6426105197Ssam &sav->sah->saidx.src.sa, 6427105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6428105197Ssam if (!m) { 6429105197Ssam error = ENOBUFS; 6430105197Ssam goto fail; 6431105197Ssam } 6432105197Ssam m_cat(result, m); 6433105197Ssam 6434105197Ssam /* set sadb_address for destination */ 6435105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6436105197Ssam &sav->sah->saidx.dst.sa, 6437105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6438105197Ssam if (!m) { 6439105197Ssam error = ENOBUFS; 6440105197Ssam goto fail; 6441105197Ssam } 6442105197Ssam m_cat(result, m); 6443105197Ssam 6444105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6445105197Ssam error = EINVAL; 6446105197Ssam goto fail; 6447105197Ssam } 6448105197Ssam 6449105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6450105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6451105197Ssam if (result == NULL) { 6452105197Ssam error = ENOBUFS; 6453105197Ssam goto fail; 6454105197Ssam } 6455105197Ssam } 6456105197Ssam 6457105197Ssam result->m_pkthdr.len = 0; 6458105197Ssam for (m = result; m; m = m->m_next) 6459105197Ssam result->m_pkthdr.len += m->m_len; 6460105197Ssam 6461105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6462105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6463105197Ssam 6464105197Ssam splx(s); 6465105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6466105197Ssam 6467105197Ssam fail: 6468105197Ssam if (result) 6469105197Ssam m_freem(result); 6470105197Ssam splx(s); 6471105197Ssam return error; 6472105197Ssam} 6473105197Ssam 6474105197Ssam/* 6475105197Ssam * SADB_FLUSH processing 6476105197Ssam * receive 6477105197Ssam * <base> 6478105197Ssam * from the ikmpd, and free all entries in secastree. 6479105197Ssam * and send, 6480105197Ssam * <base> 6481105197Ssam * to the ikmpd. 6482105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 6483105197Ssam * 6484105197Ssam * m will always be freed. 6485105197Ssam */ 6486105197Ssamstatic int 6487105197Ssamkey_flush(so, m, mhp) 6488105197Ssam struct socket *so; 6489105197Ssam struct mbuf *m; 6490105197Ssam const struct sadb_msghdr *mhp; 6491105197Ssam{ 6492183550Szec INIT_VNET_IPSEC(curvnet); 6493105197Ssam struct sadb_msg *newmsg; 6494105197Ssam struct secashead *sah, *nextsah; 6495105197Ssam struct secasvar *sav, *nextsav; 6496105197Ssam u_int16_t proto; 6497105197Ssam u_int8_t state; 6498105197Ssam u_int stateidx; 6499105197Ssam 6500120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6501120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6502120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6503105197Ssam 6504105197Ssam /* map satype to proto */ 6505105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6506120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6507120585Ssam __func__)); 6508105197Ssam return key_senderror(so, m, EINVAL); 6509105197Ssam } 6510105197Ssam 6511105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 6512120585Ssam SAHTREE_LOCK(); 6513181803Sbz for (sah = LIST_FIRST(&V_sahtree); 6514105197Ssam sah != NULL; 6515105197Ssam sah = nextsah) { 6516105197Ssam nextsah = LIST_NEXT(sah, chain); 6517105197Ssam 6518105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6519105197Ssam && proto != sah->saidx.proto) 6520105197Ssam continue; 6521105197Ssam 6522105197Ssam for (stateidx = 0; 6523185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 6524105197Ssam stateidx++) { 6525185348Szec state = saorder_state_any[stateidx]; 6526105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 6527105197Ssam sav != NULL; 6528105197Ssam sav = nextsav) { 6529105197Ssam 6530105197Ssam nextsav = LIST_NEXT(sav, chain); 6531105197Ssam 6532105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6533105197Ssam KEY_FREESAV(&sav); 6534105197Ssam } 6535105197Ssam } 6536105197Ssam 6537105197Ssam sah->state = SADB_SASTATE_DEAD; 6538105197Ssam } 6539120585Ssam SAHTREE_UNLOCK(); 6540105197Ssam 6541105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 6542105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6543120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6544105197Ssam return key_senderror(so, m, ENOBUFS); 6545105197Ssam } 6546105197Ssam 6547105197Ssam if (m->m_next) 6548105197Ssam m_freem(m->m_next); 6549105197Ssam m->m_next = NULL; 6550105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6551105197Ssam newmsg = mtod(m, struct sadb_msg *); 6552105197Ssam newmsg->sadb_msg_errno = 0; 6553105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6554105197Ssam 6555105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6556105197Ssam} 6557105197Ssam 6558105197Ssam/* 6559105197Ssam * SADB_DUMP processing 6560105197Ssam * dump all entries including status of DEAD in SAD. 6561105197Ssam * receive 6562105197Ssam * <base> 6563105197Ssam * from the ikmpd, and dump all secasvar leaves 6564105197Ssam * and send, 6565105197Ssam * <base> ..... 6566105197Ssam * to the ikmpd. 6567105197Ssam * 6568105197Ssam * m will always be freed. 6569105197Ssam */ 6570105197Ssamstatic int 6571105197Ssamkey_dump(so, m, mhp) 6572105197Ssam struct socket *so; 6573105197Ssam struct mbuf *m; 6574105197Ssam const struct sadb_msghdr *mhp; 6575105197Ssam{ 6576183550Szec INIT_VNET_IPSEC(curvnet); 6577105197Ssam struct secashead *sah; 6578105197Ssam struct secasvar *sav; 6579105197Ssam u_int16_t proto; 6580105197Ssam u_int stateidx; 6581105197Ssam u_int8_t satype; 6582105197Ssam u_int8_t state; 6583105197Ssam int cnt; 6584105197Ssam struct sadb_msg *newmsg; 6585105197Ssam struct mbuf *n; 6586105197Ssam 6587120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6588120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6589120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6590120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6591105197Ssam 6592105197Ssam /* map satype to proto */ 6593105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6594120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6595120585Ssam __func__)); 6596105197Ssam return key_senderror(so, m, EINVAL); 6597105197Ssam } 6598105197Ssam 6599105197Ssam /* count sav entries to be sent to the userland. */ 6600105197Ssam cnt = 0; 6601120585Ssam SAHTREE_LOCK(); 6602181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6603105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6604105197Ssam && proto != sah->saidx.proto) 6605105197Ssam continue; 6606105197Ssam 6607105197Ssam for (stateidx = 0; 6608185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6609105197Ssam stateidx++) { 6610185348Szec state = saorder_state_any[stateidx]; 6611105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6612105197Ssam cnt++; 6613105197Ssam } 6614105197Ssam } 6615105197Ssam } 6616105197Ssam 6617119643Ssam if (cnt == 0) { 6618120585Ssam SAHTREE_UNLOCK(); 6619105197Ssam return key_senderror(so, m, ENOENT); 6620119643Ssam } 6621105197Ssam 6622105197Ssam /* send this to the userland, one at a time. */ 6623105197Ssam newmsg = NULL; 6624181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6625105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6626105197Ssam && proto != sah->saidx.proto) 6627105197Ssam continue; 6628105197Ssam 6629105197Ssam /* map proto to satype */ 6630105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6631120585Ssam SAHTREE_UNLOCK(); 6632120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 6633120585Ssam "SAD.\n", __func__)); 6634105197Ssam return key_senderror(so, m, EINVAL); 6635105197Ssam } 6636105197Ssam 6637105197Ssam for (stateidx = 0; 6638185348Szec stateidx < _ARRAYLEN(saorder_state_any); 6639105197Ssam stateidx++) { 6640185348Szec state = saorder_state_any[stateidx]; 6641105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6642105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 6643105197Ssam --cnt, mhp->msg->sadb_msg_pid); 6644119643Ssam if (!n) { 6645120585Ssam SAHTREE_UNLOCK(); 6646105197Ssam return key_senderror(so, m, ENOBUFS); 6647119643Ssam } 6648105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6649105197Ssam } 6650105197Ssam } 6651105197Ssam } 6652120585Ssam SAHTREE_UNLOCK(); 6653105197Ssam 6654105197Ssam m_freem(m); 6655105197Ssam return 0; 6656105197Ssam} 6657105197Ssam 6658105197Ssam/* 6659105197Ssam * SADB_X_PROMISC processing 6660105197Ssam * 6661105197Ssam * m will always be freed. 6662105197Ssam */ 6663105197Ssamstatic int 6664105197Ssamkey_promisc(so, m, mhp) 6665105197Ssam struct socket *so; 6666105197Ssam struct mbuf *m; 6667105197Ssam const struct sadb_msghdr *mhp; 6668105197Ssam{ 6669105197Ssam int olen; 6670105197Ssam 6671120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6672120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6673120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6674120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6675105197Ssam 6676105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6677105197Ssam 6678105197Ssam if (olen < sizeof(struct sadb_msg)) { 6679105197Ssam#if 1 6680105197Ssam return key_senderror(so, m, EINVAL); 6681105197Ssam#else 6682105197Ssam m_freem(m); 6683105197Ssam return 0; 6684105197Ssam#endif 6685105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 6686105197Ssam /* enable/disable promisc mode */ 6687105197Ssam struct keycb *kp; 6688105197Ssam 6689105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6690105197Ssam return key_senderror(so, m, EINVAL); 6691105197Ssam mhp->msg->sadb_msg_errno = 0; 6692105197Ssam switch (mhp->msg->sadb_msg_satype) { 6693105197Ssam case 0: 6694105197Ssam case 1: 6695105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 6696105197Ssam break; 6697105197Ssam default: 6698105197Ssam return key_senderror(so, m, EINVAL); 6699105197Ssam } 6700105197Ssam 6701105197Ssam /* send the original message back to everyone */ 6702105197Ssam mhp->msg->sadb_msg_errno = 0; 6703105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6704105197Ssam } else { 6705105197Ssam /* send packet as is */ 6706105197Ssam 6707105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6708105197Ssam 6709105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6710105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6711105197Ssam } 6712105197Ssam} 6713105197Ssam 6714105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6715105197Ssam const struct sadb_msghdr *)) = { 6716105197Ssam NULL, /* SADB_RESERVED */ 6717105197Ssam key_getspi, /* SADB_GETSPI */ 6718105197Ssam key_update, /* SADB_UPDATE */ 6719105197Ssam key_add, /* SADB_ADD */ 6720105197Ssam key_delete, /* SADB_DELETE */ 6721105197Ssam key_get, /* SADB_GET */ 6722105197Ssam key_acquire2, /* SADB_ACQUIRE */ 6723105197Ssam key_register, /* SADB_REGISTER */ 6724105197Ssam NULL, /* SADB_EXPIRE */ 6725105197Ssam key_flush, /* SADB_FLUSH */ 6726105197Ssam key_dump, /* SADB_DUMP */ 6727105197Ssam key_promisc, /* SADB_X_PROMISC */ 6728105197Ssam NULL, /* SADB_X_PCHANGE */ 6729105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 6730105197Ssam key_spdadd, /* SADB_X_SPDADD */ 6731105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 6732105197Ssam key_spdget, /* SADB_X_SPDGET */ 6733105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 6734105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 6735105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 6736105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 6737105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 6738105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 6739105197Ssam}; 6740105197Ssam 6741105197Ssam/* 6742105197Ssam * parse sadb_msg buffer to process PFKEYv2, 6743105197Ssam * and create a data to response if needed. 6744105197Ssam * I think to be dealed with mbuf directly. 6745105197Ssam * IN: 6746105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 6747105197Ssam * This is rewrited to response. 6748105197Ssam * so : pointer to socket. 6749105197Ssam * OUT: 6750105197Ssam * length for buffer to send to user process. 6751105197Ssam */ 6752105197Ssamint 6753105197Ssamkey_parse(m, so) 6754105197Ssam struct mbuf *m; 6755105197Ssam struct socket *so; 6756105197Ssam{ 6757183550Szec INIT_VNET_IPSEC(curvnet); 6758105197Ssam struct sadb_msg *msg; 6759105197Ssam struct sadb_msghdr mh; 6760105197Ssam u_int orglen; 6761105197Ssam int error; 6762105197Ssam int target; 6763105197Ssam 6764120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6765120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6766105197Ssam 6767105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6768105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 6769120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 6770105197Ssam kdebug_sadb(msg)); 6771105197Ssam#endif 6772105197Ssam 6773105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 6774105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 6775105197Ssam if (!m) 6776105197Ssam return ENOBUFS; 6777105197Ssam } 6778105197Ssam msg = mtod(m, struct sadb_msg *); 6779105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6780105197Ssam target = KEY_SENDUP_ONE; 6781105197Ssam 6782105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 6783105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 6784120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 6785181803Sbz V_pfkeystat.out_invlen++; 6786105197Ssam error = EINVAL; 6787105197Ssam goto senderror; 6788105197Ssam } 6789105197Ssam 6790105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 6791120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 6792120585Ssam __func__, msg->sadb_msg_version)); 6793181803Sbz V_pfkeystat.out_invver++; 6794105197Ssam error = EINVAL; 6795105197Ssam goto senderror; 6796105197Ssam } 6797105197Ssam 6798105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 6799120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6800120585Ssam __func__, msg->sadb_msg_type)); 6801181803Sbz V_pfkeystat.out_invmsgtype++; 6802105197Ssam error = EINVAL; 6803105197Ssam goto senderror; 6804105197Ssam } 6805105197Ssam 6806105197Ssam /* for old-fashioned code - should be nuked */ 6807105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 6808105197Ssam m_freem(m); 6809105197Ssam return ENOBUFS; 6810105197Ssam } 6811105197Ssam if (m->m_next) { 6812105197Ssam struct mbuf *n; 6813105197Ssam 6814111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6815105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 6816111119Simp MCLGET(n, M_DONTWAIT); 6817105197Ssam if ((n->m_flags & M_EXT) == 0) { 6818105197Ssam m_free(n); 6819105197Ssam n = NULL; 6820105197Ssam } 6821105197Ssam } 6822105197Ssam if (!n) { 6823105197Ssam m_freem(m); 6824105197Ssam return ENOBUFS; 6825105197Ssam } 6826105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 6827105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 6828105197Ssam n->m_next = NULL; 6829105197Ssam m_freem(m); 6830105197Ssam m = n; 6831105197Ssam } 6832105197Ssam 6833105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 6834105197Ssam error = key_align(m, &mh); 6835105197Ssam if (error) 6836105197Ssam return error; 6837105197Ssam 6838105197Ssam msg = mh.msg; 6839105197Ssam 6840105197Ssam /* check SA type */ 6841105197Ssam switch (msg->sadb_msg_satype) { 6842105197Ssam case SADB_SATYPE_UNSPEC: 6843105197Ssam switch (msg->sadb_msg_type) { 6844105197Ssam case SADB_GETSPI: 6845105197Ssam case SADB_UPDATE: 6846105197Ssam case SADB_ADD: 6847105197Ssam case SADB_DELETE: 6848105197Ssam case SADB_GET: 6849105197Ssam case SADB_ACQUIRE: 6850105197Ssam case SADB_EXPIRE: 6851120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 6852120585Ssam "when msg type=%u.\n", __func__, 6853120585Ssam msg->sadb_msg_type)); 6854181803Sbz V_pfkeystat.out_invsatype++; 6855105197Ssam error = EINVAL; 6856105197Ssam goto senderror; 6857105197Ssam } 6858105197Ssam break; 6859105197Ssam case SADB_SATYPE_AH: 6860105197Ssam case SADB_SATYPE_ESP: 6861105197Ssam case SADB_X_SATYPE_IPCOMP: 6862125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 6863105197Ssam switch (msg->sadb_msg_type) { 6864105197Ssam case SADB_X_SPDADD: 6865105197Ssam case SADB_X_SPDDELETE: 6866105197Ssam case SADB_X_SPDGET: 6867105197Ssam case SADB_X_SPDDUMP: 6868105197Ssam case SADB_X_SPDFLUSH: 6869105197Ssam case SADB_X_SPDSETIDX: 6870105197Ssam case SADB_X_SPDUPDATE: 6871105197Ssam case SADB_X_SPDDELETE2: 6872120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 6873120585Ssam __func__, msg->sadb_msg_type)); 6874181803Sbz V_pfkeystat.out_invsatype++; 6875105197Ssam error = EINVAL; 6876105197Ssam goto senderror; 6877105197Ssam } 6878105197Ssam break; 6879105197Ssam case SADB_SATYPE_RSVP: 6880105197Ssam case SADB_SATYPE_OSPFV2: 6881105197Ssam case SADB_SATYPE_RIPV2: 6882105197Ssam case SADB_SATYPE_MIP: 6883120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 6884120585Ssam __func__, msg->sadb_msg_satype)); 6885181803Sbz V_pfkeystat.out_invsatype++; 6886105197Ssam error = EOPNOTSUPP; 6887105197Ssam goto senderror; 6888105197Ssam case 1: /* XXX: What does it do? */ 6889105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 6890105197Ssam break; 6891105197Ssam /*FALLTHROUGH*/ 6892105197Ssam default: 6893120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6894120585Ssam __func__, msg->sadb_msg_satype)); 6895181803Sbz V_pfkeystat.out_invsatype++; 6896105197Ssam error = EINVAL; 6897105197Ssam goto senderror; 6898105197Ssam } 6899105197Ssam 6900105197Ssam /* check field of upper layer protocol and address family */ 6901105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 6902105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 6903105197Ssam struct sadb_address *src0, *dst0; 6904105197Ssam u_int plen; 6905105197Ssam 6906105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 6907105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 6908105197Ssam 6909105197Ssam /* check upper layer protocol */ 6910105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 6911120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 6912120585Ssam "mismatched.\n", __func__)); 6913181803Sbz V_pfkeystat.out_invaddr++; 6914105197Ssam error = EINVAL; 6915105197Ssam goto senderror; 6916105197Ssam } 6917105197Ssam 6918105197Ssam /* check family */ 6919105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 6920105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 6921120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 6922120585Ssam __func__)); 6923181803Sbz V_pfkeystat.out_invaddr++; 6924105197Ssam error = EINVAL; 6925105197Ssam goto senderror; 6926105197Ssam } 6927105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6928105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 6929120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 6930120585Ssam "mismatched.\n", __func__)); 6931181803Sbz V_pfkeystat.out_invaddr++; 6932105197Ssam error = EINVAL; 6933105197Ssam goto senderror; 6934105197Ssam } 6935105197Ssam 6936105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6937105197Ssam case AF_INET: 6938105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6939105197Ssam sizeof(struct sockaddr_in)) { 6940181803Sbz V_pfkeystat.out_invaddr++; 6941105197Ssam error = EINVAL; 6942105197Ssam goto senderror; 6943105197Ssam } 6944105197Ssam break; 6945105197Ssam case AF_INET6: 6946105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6947105197Ssam sizeof(struct sockaddr_in6)) { 6948181803Sbz V_pfkeystat.out_invaddr++; 6949105197Ssam error = EINVAL; 6950105197Ssam goto senderror; 6951105197Ssam } 6952105197Ssam break; 6953105197Ssam default: 6954120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 6955120585Ssam __func__)); 6956181803Sbz V_pfkeystat.out_invaddr++; 6957105197Ssam error = EAFNOSUPPORT; 6958105197Ssam goto senderror; 6959105197Ssam } 6960105197Ssam 6961105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6962105197Ssam case AF_INET: 6963105197Ssam plen = sizeof(struct in_addr) << 3; 6964105197Ssam break; 6965105197Ssam case AF_INET6: 6966105197Ssam plen = sizeof(struct in6_addr) << 3; 6967105197Ssam break; 6968105197Ssam default: 6969105197Ssam plen = 0; /*fool gcc*/ 6970105197Ssam break; 6971105197Ssam } 6972105197Ssam 6973105197Ssam /* check max prefix length */ 6974105197Ssam if (src0->sadb_address_prefixlen > plen || 6975105197Ssam dst0->sadb_address_prefixlen > plen) { 6976120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 6977120585Ssam __func__)); 6978181803Sbz V_pfkeystat.out_invaddr++; 6979105197Ssam error = EINVAL; 6980105197Ssam goto senderror; 6981105197Ssam } 6982105197Ssam 6983105197Ssam /* 6984105197Ssam * prefixlen == 0 is valid because there can be a case when 6985105197Ssam * all addresses are matched. 6986105197Ssam */ 6987105197Ssam } 6988105197Ssam 6989105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 6990105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 6991181803Sbz V_pfkeystat.out_invmsgtype++; 6992105197Ssam error = EINVAL; 6993105197Ssam goto senderror; 6994105197Ssam } 6995105197Ssam 6996105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 6997105197Ssam 6998105197Ssamsenderror: 6999105197Ssam msg->sadb_msg_errno = error; 7000105197Ssam return key_sendup_mbuf(so, m, target); 7001105197Ssam} 7002105197Ssam 7003105197Ssamstatic int 7004105197Ssamkey_senderror(so, m, code) 7005105197Ssam struct socket *so; 7006105197Ssam struct mbuf *m; 7007105197Ssam int code; 7008105197Ssam{ 7009105197Ssam struct sadb_msg *msg; 7010105197Ssam 7011120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7012120585Ssam ("mbuf too small, len %u", m->m_len)); 7013105197Ssam 7014105197Ssam msg = mtod(m, struct sadb_msg *); 7015105197Ssam msg->sadb_msg_errno = code; 7016105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7017105197Ssam} 7018105197Ssam 7019105197Ssam/* 7020105197Ssam * set the pointer to each header into message buffer. 7021105197Ssam * m will be freed on error. 7022105197Ssam * XXX larger-than-MCLBYTES extension? 7023105197Ssam */ 7024105197Ssamstatic int 7025105197Ssamkey_align(m, mhp) 7026105197Ssam struct mbuf *m; 7027105197Ssam struct sadb_msghdr *mhp; 7028105197Ssam{ 7029183550Szec INIT_VNET_IPSEC(curvnet); 7030105197Ssam struct mbuf *n; 7031105197Ssam struct sadb_ext *ext; 7032105197Ssam size_t off, end; 7033105197Ssam int extlen; 7034105197Ssam int toff; 7035105197Ssam 7036120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7037120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7038120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7039120585Ssam ("mbuf too small, len %u", m->m_len)); 7040105197Ssam 7041105197Ssam /* initialize */ 7042105197Ssam bzero(mhp, sizeof(*mhp)); 7043105197Ssam 7044105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7045105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7046105197Ssam 7047105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7048105197Ssam extlen = end; /*just in case extlen is not updated*/ 7049105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7050105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7051105197Ssam if (!n) { 7052105197Ssam /* m is already freed */ 7053105197Ssam return ENOBUFS; 7054105197Ssam } 7055105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7056105197Ssam 7057105197Ssam /* set pointer */ 7058105197Ssam switch (ext->sadb_ext_type) { 7059105197Ssam case SADB_EXT_SA: 7060105197Ssam case SADB_EXT_ADDRESS_SRC: 7061105197Ssam case SADB_EXT_ADDRESS_DST: 7062105197Ssam case SADB_EXT_ADDRESS_PROXY: 7063105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7064105197Ssam case SADB_EXT_LIFETIME_HARD: 7065105197Ssam case SADB_EXT_LIFETIME_SOFT: 7066105197Ssam case SADB_EXT_KEY_AUTH: 7067105197Ssam case SADB_EXT_KEY_ENCRYPT: 7068105197Ssam case SADB_EXT_IDENTITY_SRC: 7069105197Ssam case SADB_EXT_IDENTITY_DST: 7070105197Ssam case SADB_EXT_SENSITIVITY: 7071105197Ssam case SADB_EXT_PROPOSAL: 7072105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7073105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7074105197Ssam case SADB_EXT_SPIRANGE: 7075105197Ssam case SADB_X_EXT_POLICY: 7076105197Ssam case SADB_X_EXT_SA2: 7077105197Ssam /* duplicate check */ 7078105197Ssam /* 7079105197Ssam * XXX Are there duplication payloads of either 7080105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7081105197Ssam */ 7082105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7083120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7084120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7085105197Ssam m_freem(m); 7086181803Sbz V_pfkeystat.out_dupext++; 7087105197Ssam return EINVAL; 7088105197Ssam } 7089105197Ssam break; 7090105197Ssam default: 7091120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7092120585Ssam __func__, ext->sadb_ext_type)); 7093105197Ssam m_freem(m); 7094181803Sbz V_pfkeystat.out_invexttype++; 7095105197Ssam return EINVAL; 7096105197Ssam } 7097105197Ssam 7098105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7099105197Ssam 7100105197Ssam if (key_validate_ext(ext, extlen)) { 7101105197Ssam m_freem(m); 7102181803Sbz V_pfkeystat.out_invlen++; 7103105197Ssam return EINVAL; 7104105197Ssam } 7105105197Ssam 7106105197Ssam n = m_pulldown(m, off, extlen, &toff); 7107105197Ssam if (!n) { 7108105197Ssam /* m is already freed */ 7109105197Ssam return ENOBUFS; 7110105197Ssam } 7111105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7112105197Ssam 7113105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7114105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7115105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7116105197Ssam } 7117105197Ssam 7118105197Ssam if (off != end) { 7119105197Ssam m_freem(m); 7120181803Sbz V_pfkeystat.out_invlen++; 7121105197Ssam return EINVAL; 7122105197Ssam } 7123105197Ssam 7124105197Ssam return 0; 7125105197Ssam} 7126105197Ssam 7127105197Ssamstatic int 7128105197Ssamkey_validate_ext(ext, len) 7129105197Ssam const struct sadb_ext *ext; 7130105197Ssam int len; 7131105197Ssam{ 7132105197Ssam const struct sockaddr *sa; 7133105197Ssam enum { NONE, ADDR } checktype = NONE; 7134105197Ssam int baselen = 0; 7135105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7136105197Ssam 7137105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7138105197Ssam return EINVAL; 7139105197Ssam 7140105197Ssam /* if it does not match minimum/maximum length, bail */ 7141105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7142105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7143105197Ssam return EINVAL; 7144105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7145105197Ssam return EINVAL; 7146105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7147105197Ssam return EINVAL; 7148105197Ssam 7149105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7150105197Ssam switch (ext->sadb_ext_type) { 7151105197Ssam case SADB_EXT_ADDRESS_SRC: 7152105197Ssam case SADB_EXT_ADDRESS_DST: 7153105197Ssam case SADB_EXT_ADDRESS_PROXY: 7154105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7155105197Ssam checktype = ADDR; 7156105197Ssam break; 7157105197Ssam case SADB_EXT_IDENTITY_SRC: 7158105197Ssam case SADB_EXT_IDENTITY_DST: 7159105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7160105197Ssam SADB_X_IDENTTYPE_ADDR) { 7161105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7162105197Ssam checktype = ADDR; 7163105197Ssam } else 7164105197Ssam checktype = NONE; 7165105197Ssam break; 7166105197Ssam default: 7167105197Ssam checktype = NONE; 7168105197Ssam break; 7169105197Ssam } 7170105197Ssam 7171105197Ssam switch (checktype) { 7172105197Ssam case NONE: 7173105197Ssam break; 7174105197Ssam case ADDR: 7175105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7176105197Ssam if (len < baselen + sal) 7177105197Ssam return EINVAL; 7178105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7179105197Ssam return EINVAL; 7180105197Ssam break; 7181105197Ssam } 7182105197Ssam 7183105197Ssam return 0; 7184105197Ssam} 7185105197Ssam 7186105197Ssamvoid 7187180086Sjuliankey_init(void) 7188105197Ssam{ 7189183550Szec INIT_VNET_IPSEC(curvnet); 7190105197Ssam int i; 7191105197Ssam 7192185088Szec V_key_debug_level = 0; 7193185088Szec V_key_spi_trycnt = 1000; 7194185088Szec V_key_spi_minval = 0x100; 7195185088Szec V_key_spi_maxval = 0x0fffffff; /* XXX */ 7196185088Szec V_policy_id = 0; 7197185088Szec V_key_int_random = 60; /*interval to initialize randseed,1(m)*/ 7198185088Szec V_key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 7199185088Szec V_key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 7200185088Szec V_key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 7201185088Szec V_key_preferred_oldsa = 1; /* preferred old sa rather than new sa*/ 7202185088Szec 7203185088Szec V_acq_seq = 0; 7204185088Szec 7205185088Szec V_ipsec_esp_keymin = 256; 7206185088Szec V_ipsec_esp_auth = 0; 7207185088Szec V_ipsec_ah_keymin = 128; 7208185088Szec 7209120585Ssam SPTREE_LOCK_INIT(); 7210120585Ssam REGTREE_LOCK_INIT(); 7211120585Ssam SAHTREE_LOCK_INIT(); 7212120585Ssam ACQ_LOCK_INIT(); 7213120585Ssam SPACQ_LOCK_INIT(); 7214119643Ssam 7215119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7216181803Sbz LIST_INIT(&V_sptree[i]); 7217105197Ssam 7218181803Sbz LIST_INIT(&V_sahtree); 7219105197Ssam 7220119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7221181803Sbz LIST_INIT(&V_regtree[i]); 7222105197Ssam 7223181803Sbz LIST_INIT(&V_acqtree); 7224181803Sbz LIST_INIT(&V_spacqtree); 7225105197Ssam 7226105197Ssam /* system default */ 7227181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7228181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7229105197Ssam 7230105197Ssam#ifndef IPSEC_DEBUG2 7231105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7232105197Ssam#endif /*IPSEC_DEBUG2*/ 7233105197Ssam 7234105197Ssam /* initialize key statistics */ 7235105197Ssam keystat.getspi_count = 1; 7236105197Ssam 7237177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7238105197Ssam 7239105197Ssam return; 7240105197Ssam} 7241105197Ssam 7242105197Ssam/* 7243105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7244105197Ssam * 7245105197Ssam * Special check for tunnel-mode packets. 7246105197Ssam * We must make some checks for consistency between inner and outer IP header. 7247105197Ssam * 7248105197Ssam * xxx more checks to be provided 7249105197Ssam */ 7250105197Ssamint 7251105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7252105197Ssam struct secasvar *sav; 7253105197Ssam u_int family; 7254105197Ssam caddr_t src; 7255105197Ssam caddr_t dst; 7256105197Ssam{ 7257120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7258105197Ssam 7259105197Ssam /* XXX: check inner IP header */ 7260105197Ssam 7261105197Ssam return 1; 7262105197Ssam} 7263105197Ssam 7264105197Ssam/* record data transfer on SA, and update timestamps */ 7265105197Ssamvoid 7266105197Ssamkey_sa_recordxfer(sav, m) 7267105197Ssam struct secasvar *sav; 7268105197Ssam struct mbuf *m; 7269105197Ssam{ 7270120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7271120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7272105197Ssam if (!sav->lft_c) 7273105197Ssam return; 7274105197Ssam 7275105197Ssam /* 7276105197Ssam * XXX Currently, there is a difference of bytes size 7277105197Ssam * between inbound and outbound processing. 7278105197Ssam */ 7279157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7280105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7281105197Ssam 7282105197Ssam /* 7283105197Ssam * We use the number of packets as the unit of 7284157123Sgnn * allocations. We increment the variable 7285105197Ssam * whenever {esp,ah}_{in,out}put is called. 7286105197Ssam */ 7287157123Sgnn sav->lft_c->allocations++; 7288105197Ssam /* XXX check for expires? */ 7289105197Ssam 7290105197Ssam /* 7291157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7292105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7293157123Sgnn * difference (again in seconds) from usetime. 7294105197Ssam * 7295105197Ssam * usetime 7296105197Ssam * v expire expire 7297105197Ssam * -----+-----+--------+---> t 7298105197Ssam * <--------------> HARD 7299105197Ssam * <-----> SOFT 7300105197Ssam */ 7301157123Sgnn sav->lft_c->usetime = time_second; 7302105197Ssam /* XXX check for expires? */ 7303105197Ssam 7304105197Ssam return; 7305105197Ssam} 7306105197Ssam 7307105197Ssam/* dumb version */ 7308105197Ssamvoid 7309105197Ssamkey_sa_routechange(dst) 7310105197Ssam struct sockaddr *dst; 7311105197Ssam{ 7312183550Szec INIT_VNET_IPSEC(curvnet); 7313105197Ssam struct secashead *sah; 7314105197Ssam struct route *ro; 7315105197Ssam 7316120585Ssam SAHTREE_LOCK(); 7317181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7318105197Ssam ro = &sah->sa_route; 7319105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7320105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7321105197Ssam RTFREE(ro->ro_rt); 7322105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7323105197Ssam } 7324105197Ssam } 7325120585Ssam SAHTREE_UNLOCK(); 7326105197Ssam} 7327105197Ssam 7328105197Ssamstatic void 7329105197Ssamkey_sa_chgstate(sav, state) 7330105197Ssam struct secasvar *sav; 7331105197Ssam u_int8_t state; 7332105197Ssam{ 7333120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7334120585Ssam SAHTREE_LOCK_ASSERT(); 7335105197Ssam 7336119643Ssam if (sav->state != state) { 7337119643Ssam if (__LIST_CHAINED(sav)) 7338119643Ssam LIST_REMOVE(sav, chain); 7339119643Ssam sav->state = state; 7340119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7341119643Ssam } 7342105197Ssam} 7343105197Ssam 7344105197Ssamvoid 7345105197Ssamkey_sa_stir_iv(sav) 7346105197Ssam struct secasvar *sav; 7347105197Ssam{ 7348105197Ssam 7349120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7350105197Ssam key_randomfill(sav->iv, sav->ivlen); 7351105197Ssam} 7352105197Ssam 7353105197Ssam/* XXX too much? */ 7354105197Ssamstatic struct mbuf * 7355105197Ssamkey_alloc_mbuf(l) 7356105197Ssam int l; 7357105197Ssam{ 7358105197Ssam struct mbuf *m = NULL, *n; 7359105197Ssam int len, t; 7360105197Ssam 7361105197Ssam len = l; 7362105197Ssam while (len > 0) { 7363111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7364105197Ssam if (n && len > MLEN) 7365111119Simp MCLGET(n, M_DONTWAIT); 7366105197Ssam if (!n) { 7367105197Ssam m_freem(m); 7368105197Ssam return NULL; 7369105197Ssam } 7370105197Ssam 7371105197Ssam n->m_next = NULL; 7372105197Ssam n->m_len = 0; 7373105197Ssam n->m_len = M_TRAILINGSPACE(n); 7374105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7375105197Ssam if (n->m_len > len) { 7376105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7377105197Ssam n->m_data += t; 7378105197Ssam n->m_len = len; 7379105197Ssam } 7380105197Ssam 7381105197Ssam len -= n->m_len; 7382105197Ssam 7383105197Ssam if (m) 7384105197Ssam m_cat(m, n); 7385105197Ssam else 7386105197Ssam m = n; 7387105197Ssam } 7388105197Ssam 7389105197Ssam return m; 7390105197Ssam} 7391157123Sgnn 7392157123Sgnn/* 7393157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 7394157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 7395157123Sgnn * application in user land. 7396157123Sgnn * 7397157123Sgnn * IN: 7398157123Sgnn * src: A pointer to a kernel security key. 7399157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 7400157123Sgnn * OUT: 7401157123Sgnn * a valid mbuf or NULL indicating an error 7402157123Sgnn * 7403157123Sgnn */ 7404157123Sgnn 7405157123Sgnnstatic struct mbuf * 7406157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 7407157123Sgnn{ 7408157123Sgnn struct mbuf *m; 7409157123Sgnn struct sadb_key *p; 7410170799Sbz int len; 7411157123Sgnn 7412157123Sgnn if (src == NULL) 7413157123Sgnn return NULL; 7414157123Sgnn 7415170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 7416157123Sgnn m = key_alloc_mbuf(len); 7417157123Sgnn if (m == NULL) 7418157123Sgnn return NULL; 7419157123Sgnn p = mtod(m, struct sadb_key *); 7420157123Sgnn bzero(p, len); 7421157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 7422157123Sgnn p->sadb_key_exttype = exttype; 7423157123Sgnn p->sadb_key_bits = src->bits; 7424157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 7425157123Sgnn 7426157123Sgnn return m; 7427157123Sgnn} 7428157123Sgnn 7429157123Sgnn/* 7430157123Sgnn * Take one of the kernel's lifetime data structures and convert it 7431157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 7432157123Sgnn * a waiting application in user land. 7433157123Sgnn * 7434157123Sgnn * IN: 7435157123Sgnn * src: A pointer to a kernel lifetime structure. 7436157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 7437157123Sgnn * data structures for more information. 7438157123Sgnn * OUT: 7439157123Sgnn * a valid mbuf or NULL indicating an error 7440157123Sgnn * 7441157123Sgnn */ 7442157123Sgnn 7443157123Sgnnstatic struct mbuf * 7444157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 7445157123Sgnn{ 7446157123Sgnn struct mbuf *m = NULL; 7447157123Sgnn struct sadb_lifetime *p; 7448157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 7449157123Sgnn 7450157123Sgnn if (src == NULL) 7451157123Sgnn return NULL; 7452157123Sgnn 7453157123Sgnn m = key_alloc_mbuf(len); 7454157123Sgnn if (m == NULL) 7455157123Sgnn return m; 7456157123Sgnn p = mtod(m, struct sadb_lifetime *); 7457157123Sgnn 7458157123Sgnn bzero(p, len); 7459157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 7460157123Sgnn p->sadb_lifetime_exttype = exttype; 7461157123Sgnn p->sadb_lifetime_allocations = src->allocations; 7462157123Sgnn p->sadb_lifetime_bytes = src->bytes; 7463157123Sgnn p->sadb_lifetime_addtime = src->addtime; 7464157123Sgnn p->sadb_lifetime_usetime = src->usetime; 7465157123Sgnn 7466157123Sgnn return m; 7467157123Sgnn 7468157123Sgnn} 7469