1 /* $NetBSD: xform_ah.c,v 1.74 2017/10/03 08:56:52 ozaki-r Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/xform_ah.c,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $ */ 3 /* $OpenBSD: ip_ah.c,v 1.63 2001/06/26 06:18:58 angelos Exp $ */ 4 /* 5 * The authors of this code are John Ioannidis (ji@tla.org), 6 * Angelos D. Keromytis (kermit@csd.uch.gr) and 7 * Niels Provos (provos@physnet.uni-hamburg.de). 8 * 9 * The original version of this code was written by John Ioannidis 10 * for BSD/OS in Athens, Greece, in November 1995. 11 * 12 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 13 * by Angelos D. Keromytis. 14 * 15 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 16 * and Niels Provos. 17 * 18 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist. 19 * 20 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 21 * Angelos D. Keromytis and Niels Provos. 22 * Copyright (c) 1999 Niklas Hallqvist. 23 * Copyright (c) 2001 Angelos D. Keromytis. 24 * 25 * Permission to use, copy, and modify this software with or without fee 26 * is hereby granted, provided that this entire notice is included in 27 * all copies of any software which is or includes a copy or 28 * modification of this software. 29 * You may use this code under the GNU public license if you so wish. Please 30 * contribute changes back to the authors under this freer than GPL license 31 * so that we may further the use of strong encryption without limitations to 32 * all. 33 * 34 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 35 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 36 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 37 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 38 * PURPOSE. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: xform_ah.c,v 1.74 2017/10/03 08:56:52 ozaki-r Exp $"); 43 44 #if defined(_KERNEL_OPT) 45 #include "opt_inet.h" 46 #include "opt_ipsec.h" 47 #endif 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/mbuf.h> 52 #include <sys/socket.h> 53 #include <sys/syslog.h> 54 #include <sys/kernel.h> 55 #include <sys/sysctl.h> 56 #include <sys/pool.h> 57 #include <sys/pserialize.h> 58 59 #include <net/if.h> 60 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/ip.h> 64 #include <netinet/ip_ecn.h> 65 #include <netinet/ip_var.h> 66 #include <netinet/ip6.h> 67 68 #include <net/route.h> 69 #include <netipsec/ipsec.h> 70 #include <netipsec/ipsec_private.h> 71 #include <netipsec/ah.h> 72 #include <netipsec/ah_var.h> 73 #include <netipsec/xform.h> 74 75 #ifdef INET6 76 #include <netinet6/ip6_var.h> 77 #include <netinet6/scope6_var.h> 78 #include <netipsec/ipsec6.h> 79 #endif 80 81 #include <netipsec/key.h> 82 #include <netipsec/key_debug.h> 83 84 #include <opencrypto/cryptodev.h> 85 86 /* 87 * Return header size in bytes. The old protocol did not support 88 * the replay counter; the new protocol always includes the counter. 89 */ 90 #define HDRSIZE(sav) \ 91 (((sav)->flags & SADB_X_EXT_OLD) ? \ 92 sizeof(struct ah) : sizeof(struct ah) + sizeof(uint32_t)) 93 /* 94 * Return authenticator size in bytes. The old protocol is known 95 * to use a fixed 16-byte authenticator. The new algorithm gets 96 * this size from the xform but is (currently) always 12. 97 */ 98 #define AUTHSIZE(sav) \ 99 ((sav->flags & SADB_X_EXT_OLD) ? 16 : (sav)->tdb_authalgxform->authsize) 100 101 percpu_t *ahstat_percpu; 102 103 int ah_enable = 1; /* control flow of packets with AH */ 104 int ip4_ah_cleartos = 1; /* clear ip_tos when doing AH calc */ 105 106 #ifdef __FreeBSD__ 107 SYSCTL_DECL(_net_inet_ah); 108 SYSCTL_INT(_net_inet_ah, OID_AUTO, 109 ah_enable, CTLFLAG_RW, &ah_enable, 0, ""); 110 SYSCTL_INT(_net_inet_ah, OID_AUTO, 111 ah_cleartos, CTLFLAG_RW, &ip4_ah_cleartos, 0, ""); 112 SYSCTL_STRUCT(_net_inet_ah, IPSECCTL_STATS, 113 stats, CTLFLAG_RD, &ahstat, ahstat, ""); 114 115 #endif /* __FreeBSD__ */ 116 117 static unsigned char ipseczeroes[256]; /* larger than an ip6 extension hdr */ 118 119 int ah_max_authsize; /* max authsize over all algorithms */ 120 121 static int ah_input_cb(struct cryptop *); 122 static int ah_output_cb(struct cryptop *); 123 124 const uint8_t ah_stats[256] = { SADB_AALG_STATS_INIT }; 125 126 static pool_cache_t ah_tdb_crypto_pool_cache; 127 static size_t ah_pool_item_size; 128 129 /* 130 * NB: this is public for use by the PF_KEY support. 131 */ 132 const struct auth_hash * 133 ah_algorithm_lookup(int alg) 134 { 135 136 switch (alg) { 137 case SADB_X_AALG_NULL: 138 return &auth_hash_null; 139 case SADB_AALG_MD5HMAC: 140 return &auth_hash_hmac_md5_96; 141 case SADB_AALG_SHA1HMAC: 142 return &auth_hash_hmac_sha1_96; 143 case SADB_X_AALG_RIPEMD160HMAC: 144 return &auth_hash_hmac_ripemd_160_96; 145 case SADB_X_AALG_MD5: 146 return &auth_hash_key_md5; 147 case SADB_X_AALG_SHA: 148 return &auth_hash_key_sha1; 149 case SADB_X_AALG_SHA2_256: 150 return &auth_hash_hmac_sha2_256; 151 case SADB_X_AALG_SHA2_384: 152 return &auth_hash_hmac_sha2_384; 153 case SADB_X_AALG_SHA2_512: 154 return &auth_hash_hmac_sha2_512; 155 case SADB_X_AALG_AES_XCBC_MAC: 156 return &auth_hash_aes_xcbc_mac_96; 157 } 158 return NULL; 159 } 160 161 size_t 162 ah_hdrsiz(const struct secasvar *sav) 163 { 164 size_t size; 165 166 if (sav != NULL) { 167 int authsize; 168 KASSERT(sav->tdb_authalgxform != NULL); 169 /*XXX not right for null algorithm--does it matter??*/ 170 authsize = AUTHSIZE(sav); 171 size = roundup(authsize, sizeof(uint32_t)) + HDRSIZE(sav); 172 } else { 173 /* default guess */ 174 size = sizeof(struct ah) + sizeof(uint32_t) + ah_max_authsize; 175 } 176 return size; 177 } 178 179 /* 180 * NB: public for use by esp_init. 181 */ 182 int 183 ah_init0(struct secasvar *sav, const struct xformsw *xsp, 184 struct cryptoini *cria) 185 { 186 const struct auth_hash *thash; 187 int keylen; 188 189 thash = ah_algorithm_lookup(sav->alg_auth); 190 if (thash == NULL) { 191 DPRINTF(("%s: unsupported authentication algorithm %u\n", 192 __func__, sav->alg_auth)); 193 return EINVAL; 194 } 195 /* 196 * Verify the replay state block allocation is consistent with 197 * the protocol type. We check here so we can make assumptions 198 * later during protocol processing. 199 */ 200 /* NB: replay state is setup elsewhere (sigh) */ 201 if (((sav->flags&SADB_X_EXT_OLD) == 0) ^ (sav->replay != NULL)) { 202 DPRINTF(("%s: replay state block inconsistency, " 203 "%s algorithm %s replay state\n", __func__, 204 (sav->flags & SADB_X_EXT_OLD) ? "old" : "new", 205 sav->replay == NULL ? "without" : "with")); 206 return EINVAL; 207 } 208 if (sav->key_auth == NULL) { 209 DPRINTF(("%s: no authentication key for %s algorithm\n", 210 __func__, thash->name)); 211 return EINVAL; 212 } 213 keylen = _KEYLEN(sav->key_auth); 214 if (keylen != thash->keysize && thash->keysize != 0) { 215 DPRINTF(("%s: invalid keylength %d, algorithm %s requires " 216 "keysize %d\n", __func__, 217 keylen, thash->name, thash->keysize)); 218 return EINVAL; 219 } 220 221 sav->tdb_xform = xsp; 222 sav->tdb_authalgxform = thash; 223 224 /* Initialize crypto session. */ 225 memset(cria, 0, sizeof(*cria)); 226 cria->cri_alg = sav->tdb_authalgxform->type; 227 cria->cri_klen = _KEYBITS(sav->key_auth); 228 cria->cri_key = _KEYBUF(sav->key_auth); 229 230 return 0; 231 } 232 233 /* 234 * ah_init() is called when an SPI is being set up. 235 */ 236 static int 237 ah_init(struct secasvar *sav, const struct xformsw *xsp) 238 { 239 struct cryptoini cria; 240 int error; 241 242 error = ah_init0(sav, xsp, &cria); 243 if (!error) 244 error = crypto_newsession(&sav->tdb_cryptoid, 245 &cria, crypto_support); 246 return error; 247 } 248 249 /* 250 * Paranoia. 251 * 252 * NB: public for use by esp_zeroize (XXX). 253 */ 254 int 255 ah_zeroize(struct secasvar *sav) 256 { 257 int err; 258 259 if (sav->key_auth) { 260 explicit_memset(_KEYBUF(sav->key_auth), 0, 261 _KEYLEN(sav->key_auth)); 262 } 263 264 err = crypto_freesession(sav->tdb_cryptoid); 265 sav->tdb_cryptoid = 0; 266 sav->tdb_authalgxform = NULL; 267 sav->tdb_xform = NULL; 268 return err; 269 } 270 271 /* 272 * Massage IPv4/IPv6 headers for AH processing. 273 */ 274 static int 275 ah_massage_headers(struct mbuf **m0, int proto, int skip, int alg, int out) 276 { 277 struct mbuf *m = *m0; 278 unsigned char *ptr; 279 int off, count; 280 281 #ifdef INET 282 struct ip *ip; 283 #endif /* INET */ 284 285 #ifdef INET6 286 struct ip6_ext *ip6e; 287 struct ip6_hdr ip6; 288 struct ip6_rthdr *rh; 289 int alloc, ad, nxt; 290 #endif /* INET6 */ 291 292 switch (proto) { 293 #ifdef INET 294 case AF_INET: 295 /* 296 * This is the least painful way of dealing with IPv4 header 297 * and option processing -- just make sure they're in 298 * contiguous memory. 299 */ 300 *m0 = m = m_pullup(m, skip); 301 if (m == NULL) { 302 DPRINTF(("%s: m_pullup failed\n", __func__)); 303 return ENOBUFS; 304 } 305 306 /* Fix the IP header */ 307 ip = mtod(m, struct ip *); 308 if (ip4_ah_cleartos) 309 ip->ip_tos = 0; 310 ip->ip_ttl = 0; 311 ip->ip_sum = 0; 312 ip->ip_off = htons(ntohs(ip->ip_off) & ip4_ah_offsetmask); 313 314 /* 315 * On FreeBSD, ip_off and ip_len assumed in host endian; 316 * they are converted (if necessary) by ip_input(). 317 * On NetBSD, ip_off and ip_len are in network byte order. 318 * They must be massaged back to network byte order 319 * before verifying the HMAC. Moreover, on FreeBSD, 320 * we should add `skip' back into the massaged ip_len 321 * (presumably ip_input() deducted it before we got here?) 322 * whereas on NetBSD, we should not. 323 */ 324 if (!out) { 325 uint16_t inlen = ntohs(ip->ip_len); 326 327 ip->ip_len = htons(inlen); 328 329 if (alg == CRYPTO_MD5_KPDK || alg == CRYPTO_SHA1_KPDK) 330 ip->ip_off &= htons(IP_DF); 331 else 332 ip->ip_off = 0; 333 } else { 334 if (alg == CRYPTO_MD5_KPDK || alg == CRYPTO_SHA1_KPDK) 335 ip->ip_off &= htons(IP_DF); 336 else 337 ip->ip_off = 0; 338 } 339 340 ptr = mtod(m, unsigned char *); 341 342 /* IPv4 option processing */ 343 for (off = sizeof(struct ip); off < skip;) { 344 if (ptr[off] == IPOPT_EOL || ptr[off] == IPOPT_NOP || 345 off + 1 < skip) 346 ; 347 else { 348 DPRINTF(("%s: illegal IPv4 option length for " 349 "option %d\n", __func__, ptr[off])); 350 351 m_freem(m); 352 return EINVAL; 353 } 354 355 switch (ptr[off]) { 356 case IPOPT_EOL: 357 off = skip; /* End the loop. */ 358 break; 359 360 case IPOPT_NOP: 361 off++; 362 break; 363 364 case IPOPT_SECURITY: /* 0x82 */ 365 case 0x85: /* Extended security. */ 366 case 0x86: /* Commercial security. */ 367 case 0x94: /* Router alert */ 368 case 0x95: /* RFC1770 */ 369 /* Sanity check for option length. */ 370 if (ptr[off + 1] < 2) { 371 DPRINTF(("%s: illegal IPv4 option " 372 "length for option %d\n", __func__, 373 ptr[off])); 374 375 m_freem(m); 376 return EINVAL; 377 } 378 379 off += ptr[off + 1]; 380 break; 381 382 case IPOPT_LSRR: 383 case IPOPT_SSRR: 384 /* Sanity check for option length. */ 385 if (ptr[off + 1] < 2) { 386 DPRINTF(("%s: illegal IPv4 option " 387 "length for option %d\n", __func__, 388 ptr[off])); 389 390 m_freem(m); 391 return EINVAL; 392 } 393 394 /* 395 * On output, if we have either of the 396 * source routing options, we should 397 * swap the destination address of the 398 * IP header with the last address 399 * specified in the option, as that is 400 * what the destination's IP header 401 * will look like. 402 */ 403 if (out) 404 memcpy(&ip->ip_dst, 405 ptr + off + ptr[off + 1] - 406 sizeof(struct in_addr), 407 sizeof(struct in_addr)); 408 409 /* Fall through */ 410 default: 411 /* Sanity check for option length. */ 412 if (ptr[off + 1] < 2) { 413 DPRINTF(("%s: illegal IPv4 option " 414 "length for option %d\n", __func__, 415 ptr[off])); 416 m_freem(m); 417 return EINVAL; 418 } 419 420 /* Zeroize all other options. */ 421 count = ptr[off + 1]; 422 memcpy(ptr, ipseczeroes, count); 423 off += count; 424 break; 425 } 426 427 /* Sanity check. */ 428 if (off > skip) { 429 DPRINTF(("%s: malformed IPv4 options header\n", 430 __func__)); 431 432 m_freem(m); 433 return EINVAL; 434 } 435 } 436 437 break; 438 #endif /* INET */ 439 440 #ifdef INET6 441 case AF_INET6: /* Ugly... */ 442 /* Copy and "cook" the IPv6 header. */ 443 m_copydata(m, 0, sizeof(ip6), &ip6); 444 445 /* We don't do IPv6 Jumbograms. */ 446 if (ip6.ip6_plen == 0) { 447 DPRINTF(("%s: unsupported IPv6 jumbogram\n", __func__)); 448 m_freem(m); 449 return EMSGSIZE; 450 } 451 452 ip6.ip6_flow = 0; 453 ip6.ip6_hlim = 0; 454 ip6.ip6_vfc &= ~IPV6_VERSION_MASK; 455 ip6.ip6_vfc |= IPV6_VERSION; 456 457 /* Scoped address handling. */ 458 if (IN6_IS_SCOPE_LINKLOCAL(&ip6.ip6_src)) 459 ip6.ip6_src.s6_addr16[1] = 0; 460 if (IN6_IS_SCOPE_LINKLOCAL(&ip6.ip6_dst)) 461 ip6.ip6_dst.s6_addr16[1] = 0; 462 463 /* Done with IPv6 header. */ 464 m_copyback(m, 0, sizeof(struct ip6_hdr), &ip6); 465 466 /* Let's deal with the remaining headers (if any). */ 467 if (skip - sizeof(struct ip6_hdr) > 0) { 468 if (m->m_len <= skip) { 469 ptr = malloc(skip - sizeof(struct ip6_hdr), 470 M_XDATA, M_NOWAIT); 471 if (ptr == NULL) { 472 DPRINTF(("%s: failed to allocate " 473 "memory for IPv6 headers\n", 474 __func__)); 475 m_freem(m); 476 return ENOBUFS; 477 } 478 479 /* 480 * Copy all the protocol headers after 481 * the IPv6 header. 482 */ 483 m_copydata(m, sizeof(struct ip6_hdr), 484 skip - sizeof(struct ip6_hdr), ptr); 485 alloc = 1; 486 } else { 487 /* No need to allocate memory. */ 488 ptr = mtod(m, unsigned char *) + 489 sizeof(struct ip6_hdr); 490 alloc = 0; 491 } 492 } else 493 break; 494 495 nxt = ip6.ip6_nxt & 0xff; /* Next header type. */ 496 497 for (off = 0; off < skip - sizeof(struct ip6_hdr);) 498 switch (nxt) { 499 case IPPROTO_HOPOPTS: 500 case IPPROTO_DSTOPTS: 501 ip6e = (struct ip6_ext *) (ptr + off); 502 503 /* 504 * Process the mutable/immutable 505 * options -- borrows heavily from the 506 * KAME code. 507 */ 508 for (count = off + sizeof(struct ip6_ext); 509 count < off + ((ip6e->ip6e_len + 1) << 3);) { 510 if (ptr[count] == IP6OPT_PAD1) { 511 count++; 512 continue; /* Skip padding. */ 513 } 514 515 /* Sanity check. */ 516 if (count > off + 517 ((ip6e->ip6e_len + 1) << 3)) { 518 m_freem(m); 519 520 /* Free, if we allocated. */ 521 if (alloc) 522 free(ptr, M_XDATA); 523 return EINVAL; 524 } 525 526 ad = ptr[count + 1]; 527 528 /* If mutable option, zeroize. */ 529 if (ptr[count] & IP6OPT_MUTABLE) 530 memcpy(ptr + count, ipseczeroes, 531 ptr[count + 1]); 532 533 count += ad; 534 535 /* Sanity check. */ 536 if (count > 537 skip - sizeof(struct ip6_hdr)) { 538 m_freem(m); 539 540 /* Free, if we allocated. */ 541 if (alloc) 542 free(ptr, M_XDATA); 543 return EINVAL; 544 } 545 } 546 547 /* Advance. */ 548 off += ((ip6e->ip6e_len + 1) << 3); 549 nxt = ip6e->ip6e_nxt; 550 break; 551 552 case IPPROTO_ROUTING: 553 /* 554 * Always include routing headers in 555 * computation. 556 */ 557 ip6e = (struct ip6_ext *) (ptr + off); 558 rh = (struct ip6_rthdr *)(ptr + off); 559 /* 560 * must adjust content to make it look like 561 * its final form (as seen at the final 562 * destination). 563 * we only know how to massage type 0 routing 564 * header. 565 */ 566 if (out && rh->ip6r_type == IPV6_RTHDR_TYPE_0) { 567 struct ip6_rthdr0 *rh0; 568 struct in6_addr *addr, finaldst; 569 int i; 570 571 rh0 = (struct ip6_rthdr0 *)rh; 572 addr = (struct in6_addr *)(rh0 + 1); 573 574 for (i = 0; i < rh0->ip6r0_segleft; i++) 575 in6_clearscope(&addr[i]); 576 577 finaldst = addr[rh0->ip6r0_segleft - 1]; 578 memmove(&addr[1], &addr[0], 579 sizeof(struct in6_addr) * 580 (rh0->ip6r0_segleft - 1)); 581 582 m_copydata(m, 0, sizeof(ip6), &ip6); 583 addr[0] = ip6.ip6_dst; 584 ip6.ip6_dst = finaldst; 585 m_copyback(m, 0, sizeof(ip6), &ip6); 586 587 rh0->ip6r0_segleft = 0; 588 } 589 590 /* advance */ 591 off += ((ip6e->ip6e_len + 1) << 3); 592 nxt = ip6e->ip6e_nxt; 593 break; 594 595 default: 596 DPRINTF(("%s: unexpected IPv6 header type %d\n", 597 __func__, off)); 598 if (alloc) 599 free(ptr, M_XDATA); 600 m_freem(m); 601 return EINVAL; 602 } 603 604 /* Copyback and free, if we allocated. */ 605 if (alloc) { 606 m_copyback(m, sizeof(struct ip6_hdr), 607 skip - sizeof(struct ip6_hdr), ptr); 608 free(ptr, M_XDATA); 609 } 610 611 break; 612 #endif /* INET6 */ 613 } 614 615 return 0; 616 } 617 618 /* 619 * ah_input() gets called to verify that an input packet 620 * passes authentication. 621 */ 622 static int 623 ah_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 624 { 625 const struct auth_hash *ahx; 626 struct tdb_crypto *tc = NULL; 627 struct newah *ah; 628 int hl, rplen, authsize, error, stat = AH_STAT_HDROPS; 629 struct cryptodesc *crda; 630 struct cryptop *crp = NULL; 631 632 IPSEC_SPLASSERT_SOFTNET(__func__); 633 634 KASSERT(sav != NULL); 635 KASSERT(sav->key_auth != NULL); 636 KASSERT(sav->tdb_authalgxform != NULL); 637 638 /* Figure out header size. */ 639 rplen = HDRSIZE(sav); 640 641 /* XXX don't pullup, just copy header */ 642 IP6_EXTHDR_GET(ah, struct newah *, m, skip, rplen); 643 if (ah == NULL) { 644 DPRINTF(("%s: cannot pullup header\n", __func__)); 645 error = ENOBUFS; 646 stat = AH_STAT_HDROPS; /*XXX*/ 647 goto bad; 648 } 649 650 /* Check replay window, if applicable. */ 651 if (sav->replay && !ipsec_chkreplay(ntohl(ah->ah_seq), sav)) { 652 char buf[IPSEC_LOGSASTRLEN]; 653 DPRINTF(("%s: packet replay failure: %s\n", __func__, 654 ipsec_logsastr(sav, buf, sizeof(buf)))); 655 stat = AH_STAT_REPLAY; 656 error = ENOBUFS; 657 goto bad; 658 } 659 660 /* Verify AH header length. */ 661 hl = ah->ah_len * sizeof(uint32_t); 662 ahx = sav->tdb_authalgxform; 663 authsize = AUTHSIZE(sav); 664 if (hl != authsize + rplen - sizeof(struct ah)) { 665 char buf[IPSEC_ADDRSTRLEN]; 666 DPRINTF(("%s: bad authenticator length %u (expecting %lu)" 667 " for packet in SA %s/%08lx\n", __func__, 668 hl, (u_long) (authsize + rplen - sizeof(struct ah)), 669 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 670 (u_long) ntohl(sav->spi))); 671 stat = AH_STAT_BADAUTHL; 672 error = EACCES; 673 goto bad; 674 } 675 AH_STATADD(AH_STAT_IBYTES, m->m_pkthdr.len - skip - hl); 676 677 /* Get crypto descriptors. */ 678 crp = crypto_getreq(1); 679 if (crp == NULL) { 680 DPRINTF(("%s: failed to acquire crypto descriptor\n", __func__)); 681 stat = AH_STAT_CRYPTO; 682 error = ENOBUFS; 683 goto bad; 684 } 685 686 crda = crp->crp_desc; 687 KASSERT(crda != NULL); 688 689 crda->crd_skip = 0; 690 crda->crd_len = m->m_pkthdr.len; 691 crda->crd_inject = skip + rplen; 692 693 /* Authentication operation. */ 694 crda->crd_alg = ahx->type; 695 crda->crd_key = _KEYBUF(sav->key_auth); 696 crda->crd_klen = _KEYBITS(sav->key_auth); 697 698 /* Allocate IPsec-specific opaque crypto info. */ 699 size_t size = sizeof(*tc); 700 size_t extra = skip + rplen + authsize; 701 size += extra; 702 703 KASSERTMSG(size <= ah_pool_item_size, 704 "size=%zu > ah_pool_item_size=%zu\n", size, ah_pool_item_size); 705 tc = pool_cache_get(ah_tdb_crypto_pool_cache, PR_NOWAIT); 706 if (tc == NULL) { 707 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 708 stat = AH_STAT_CRYPTO; 709 error = ENOBUFS; 710 goto bad; 711 } 712 713 error = m_makewritable(&m, 0, extra, M_NOWAIT); 714 if (error) { 715 DPRINTF(("%s: failed to m_makewritable\n", __func__)); 716 goto bad; 717 } 718 719 /* 720 * Save the authenticator, the skipped portion of the packet, 721 * and the AH header. 722 */ 723 m_copydata(m, 0, extra, (tc + 1)); 724 /* Zeroize the authenticator on the packet. */ 725 m_copyback(m, skip + rplen, authsize, ipseczeroes); 726 727 /* "Massage" the packet headers for crypto processing. */ 728 error = ah_massage_headers(&m, sav->sah->saidx.dst.sa.sa_family, 729 skip, ahx->type, 0); 730 if (error != 0) { 731 /* NB: mbuf is free'd by ah_massage_headers */ 732 m = NULL; 733 goto bad; 734 } 735 736 { 737 int s = pserialize_read_enter(); 738 739 /* 740 * Take another reference to the SA for opencrypto callback. 741 */ 742 if (__predict_false(sav->state == SADB_SASTATE_DEAD)) { 743 pserialize_read_exit(s); 744 stat = AH_STAT_NOTDB; 745 error = ENOENT; 746 goto bad; 747 } 748 KEY_SA_REF(sav); 749 pserialize_read_exit(s); 750 } 751 752 /* Crypto operation descriptor. */ 753 crp->crp_ilen = m->m_pkthdr.len; /* Total input length. */ 754 crp->crp_flags = CRYPTO_F_IMBUF; 755 crp->crp_buf = m; 756 crp->crp_callback = ah_input_cb; 757 crp->crp_sid = sav->tdb_cryptoid; 758 crp->crp_opaque = tc; 759 760 /* These are passed as-is to the callback. */ 761 tc->tc_spi = sav->spi; 762 tc->tc_dst = sav->sah->saidx.dst; 763 tc->tc_proto = sav->sah->saidx.proto; 764 tc->tc_nxt = ah->ah_nxt; 765 tc->tc_protoff = protoff; 766 tc->tc_skip = skip; 767 tc->tc_sav = sav; 768 769 DPRINTF(("%s: hash over %d bytes, skip %d: " 770 "crda len %d skip %d inject %d\n", __func__, 771 crp->crp_ilen, tc->tc_skip, 772 crda->crd_len, crda->crd_skip, crda->crd_inject)); 773 774 return crypto_dispatch(crp); 775 776 bad: 777 if (tc != NULL) 778 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 779 if (crp != NULL) 780 crypto_freereq(crp); 781 if (m != NULL) 782 m_freem(m); 783 AH_STATINC(stat); 784 return error; 785 } 786 787 #ifdef INET6 788 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 789 if (saidx->dst.sa.sa_family == AF_INET6) { \ 790 error = ipsec6_common_input_cb(m, sav, skip, protoff); \ 791 } else { \ 792 error = ipsec4_common_input_cb(m, sav, skip, protoff); \ 793 } \ 794 } while (0) 795 #else 796 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 797 (error = ipsec4_common_input_cb(m, sav, skip, protoff)) 798 #endif 799 800 /* 801 * AH input callback from the crypto driver. 802 */ 803 static int 804 ah_input_cb(struct cryptop *crp) 805 { 806 char buf[IPSEC_ADDRSTRLEN]; 807 int rplen, error, skip, protoff; 808 unsigned char calc[AH_ALEN_MAX]; 809 struct mbuf *m; 810 struct tdb_crypto *tc; 811 struct secasvar *sav; 812 struct secasindex *saidx; 813 uint8_t nxt; 814 char *ptr; 815 int authsize; 816 uint16_t dport; 817 uint16_t sport; 818 IPSEC_DECLARE_LOCK_VARIABLE; 819 820 KASSERT(crp->crp_opaque != NULL); 821 tc = crp->crp_opaque; 822 skip = tc->tc_skip; 823 nxt = tc->tc_nxt; 824 protoff = tc->tc_protoff; 825 m = crp->crp_buf; 826 827 828 /* find the source port for NAT-T */ 829 nat_t_ports_get(m, &dport, &sport); 830 831 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 832 833 sav = tc->tc_sav; 834 if (__predict_false(!SADB_SASTATE_USABLE_P(sav))) { 835 KEY_SA_UNREF(&sav); 836 sav = KEY_LOOKUP_SA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 837 sport, dport); 838 if (sav == NULL) { 839 AH_STATINC(AH_STAT_NOTDB); 840 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 841 error = ENOBUFS; /*XXX*/ 842 goto bad; 843 } 844 } 845 846 saidx = &sav->sah->saidx; 847 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 848 saidx->dst.sa.sa_family == AF_INET6, 849 "unexpected protocol family %u", saidx->dst.sa.sa_family); 850 851 /* Check for crypto errors. */ 852 if (crp->crp_etype) { 853 if (sav->tdb_cryptoid != 0) 854 sav->tdb_cryptoid = crp->crp_sid; 855 856 if (crp->crp_etype == EAGAIN) { 857 IPSEC_RELEASE_GLOBAL_LOCKS(); 858 return crypto_dispatch(crp); 859 } 860 861 AH_STATINC(AH_STAT_NOXFORM); 862 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 863 error = crp->crp_etype; 864 goto bad; 865 } else { 866 AH_STATINC(AH_STAT_HIST + ah_stats[sav->alg_auth]); 867 crypto_freereq(crp); /* No longer needed. */ 868 crp = NULL; 869 } 870 871 /* Figure out header size. */ 872 rplen = HDRSIZE(sav); 873 authsize = AUTHSIZE(sav); 874 875 if (ipsec_debug) 876 memset(calc, 0, sizeof(calc)); 877 878 /* Copy authenticator off the packet. */ 879 m_copydata(m, skip + rplen, authsize, calc); 880 881 ptr = (char *)(tc + 1); 882 const uint8_t *pppp = ptr + skip + rplen; 883 884 /* Verify authenticator. */ 885 if (!consttime_memequal(pppp, calc, authsize)) { 886 DPRINTF(("%s: authentication hash mismatch " \ 887 "over %d bytes " \ 888 "for packet in SA %s/%08lx:\n" \ 889 "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x, " \ 890 "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x\n", 891 __func__, authsize, 892 ipsec_address(&saidx->dst, buf, sizeof(buf)), 893 (u_long) ntohl(sav->spi), 894 calc[0], calc[1], calc[2], calc[3], 895 calc[4], calc[5], calc[6], calc[7], 896 calc[8], calc[9], calc[10], calc[11], 897 pppp[0], pppp[1], pppp[2], pppp[3], 898 pppp[4], pppp[5], pppp[6], pppp[7], 899 pppp[8], pppp[9], pppp[10], pppp[11] 900 )); 901 AH_STATINC(AH_STAT_BADAUTH); 902 error = EACCES; 903 goto bad; 904 } 905 906 /* Fix the Next Protocol field. */ 907 ptr[protoff] = nxt; 908 909 /* Copyback the saved (uncooked) network headers. */ 910 m_copyback(m, 0, skip, ptr); 911 912 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 913 tc = NULL; 914 915 /* 916 * Header is now authenticated. 917 */ 918 m->m_flags |= M_AUTHIPHDR|M_AUTHIPDGM; 919 920 /* 921 * Update replay sequence number, if appropriate. 922 */ 923 if (sav->replay) { 924 uint32_t seq; 925 926 m_copydata(m, skip + offsetof(struct newah, ah_seq), 927 sizeof(seq), &seq); 928 if (ipsec_updatereplay(ntohl(seq), sav)) { 929 AH_STATINC(AH_STAT_REPLAY); 930 error = ENOBUFS; /*XXX as above*/ 931 goto bad; 932 } 933 } 934 935 /* 936 * Remove the AH header and authenticator from the mbuf. 937 */ 938 error = m_striphdr(m, skip, rplen + authsize); 939 if (error) { 940 DPRINTF(("%s: mangled mbuf chain for SA %s/%08lx\n", __func__, 941 ipsec_address(&saidx->dst, buf, sizeof(buf)), 942 (u_long) ntohl(sav->spi))); 943 944 AH_STATINC(AH_STAT_HDROPS); 945 goto bad; 946 } 947 948 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 949 950 KEY_SA_UNREF(&sav); 951 IPSEC_RELEASE_GLOBAL_LOCKS(); 952 return error; 953 bad: 954 if (sav) 955 KEY_SA_UNREF(&sav); 956 IPSEC_RELEASE_GLOBAL_LOCKS(); 957 if (m != NULL) 958 m_freem(m); 959 if (tc != NULL) 960 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 961 if (crp != NULL) 962 crypto_freereq(crp); 963 return error; 964 } 965 966 /* 967 * AH output routine, called by ipsec[46]_process_packet(). 968 */ 969 static int 970 ah_output( 971 struct mbuf *m, 972 const struct ipsecrequest *isr, 973 struct secasvar *sav, 974 struct mbuf **mp, 975 int skip, 976 int protoff 977 ) 978 { 979 char buf[IPSEC_ADDRSTRLEN]; 980 const struct auth_hash *ahx; 981 struct cryptodesc *crda; 982 struct tdb_crypto *tc; 983 struct mbuf *mi; 984 struct cryptop *crp; 985 uint16_t iplen; 986 int error, rplen, authsize, maxpacketsize, roff; 987 uint8_t prot; 988 struct newah *ah; 989 990 IPSEC_SPLASSERT_SOFTNET(__func__); 991 992 KASSERT(sav != NULL); 993 KASSERT(sav->tdb_authalgxform != NULL); 994 ahx = sav->tdb_authalgxform; 995 996 AH_STATINC(AH_STAT_OUTPUT); 997 998 /* Figure out header size. */ 999 rplen = HDRSIZE(sav); 1000 1001 size_t ipoffs; 1002 /* Check for maximum packet size violations. */ 1003 switch (sav->sah->saidx.dst.sa.sa_family) { 1004 #ifdef INET 1005 case AF_INET: 1006 maxpacketsize = IP_MAXPACKET; 1007 ipoffs = offsetof(struct ip, ip_len); 1008 break; 1009 #endif /* INET */ 1010 #ifdef INET6 1011 case AF_INET6: 1012 maxpacketsize = IPV6_MAXPACKET; 1013 ipoffs = offsetof(struct ip6_hdr, ip6_plen); 1014 break; 1015 #endif /* INET6 */ 1016 default: 1017 DPRINTF(("%s: unknown/unsupported protocol " 1018 "family %u, SA %s/%08lx\n", __func__, 1019 sav->sah->saidx.dst.sa.sa_family, 1020 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 1021 (u_long) ntohl(sav->spi))); 1022 AH_STATINC(AH_STAT_NOPF); 1023 error = EPFNOSUPPORT; 1024 goto bad; 1025 } 1026 authsize = AUTHSIZE(sav); 1027 if (rplen + authsize + m->m_pkthdr.len > maxpacketsize) { 1028 DPRINTF(("%s: packet in SA %s/%08lx got too big " 1029 "(len %u, max len %u)\n", __func__, 1030 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 1031 (u_long) ntohl(sav->spi), 1032 rplen + authsize + m->m_pkthdr.len, maxpacketsize)); 1033 AH_STATINC(AH_STAT_TOOBIG); 1034 error = EMSGSIZE; 1035 goto bad; 1036 } 1037 1038 /* Update the counters. */ 1039 AH_STATADD(AH_STAT_OBYTES, m->m_pkthdr.len - skip); 1040 1041 m = m_clone(m); 1042 if (m == NULL) { 1043 DPRINTF(("%s: cannot clone mbuf chain, SA %s/%08lx\n", __func__, 1044 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 1045 (u_long) ntohl(sav->spi))); 1046 AH_STATINC(AH_STAT_HDROPS); 1047 error = ENOBUFS; 1048 goto bad; 1049 } 1050 1051 /* Inject AH header. */ 1052 mi = m_makespace(m, skip, rplen + authsize, &roff); 1053 if (mi == NULL) { 1054 DPRINTF(("%s: failed to inject %u byte AH header for SA " 1055 "%s/%08lx\n", __func__, 1056 rplen + authsize, 1057 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 1058 (u_long) ntohl(sav->spi))); 1059 AH_STATINC(AH_STAT_HDROPS); /*XXX differs from openbsd */ 1060 error = ENOBUFS; 1061 goto bad; 1062 } 1063 1064 /* 1065 * The AH header is guaranteed by m_makespace() to be in 1066 * contiguous memory, at roff bytes offset into the returned mbuf. 1067 */ 1068 ah = (struct newah *)(mtod(mi, char *) + roff); 1069 1070 /* Initialize the AH header. */ 1071 m_copydata(m, protoff, sizeof(uint8_t), &ah->ah_nxt); 1072 ah->ah_len = (rplen + authsize - sizeof(struct ah)) / sizeof(uint32_t); 1073 ah->ah_reserve = 0; 1074 ah->ah_spi = sav->spi; 1075 1076 /* Zeroize authenticator. */ 1077 m_copyback(m, skip + rplen, authsize, ipseczeroes); 1078 1079 /* Insert packet replay counter, as requested. */ 1080 if (sav->replay) { 1081 if (sav->replay->count == ~0 && 1082 (sav->flags & SADB_X_EXT_CYCSEQ) == 0) { 1083 DPRINTF(("%s: replay counter wrapped for SA %s/%08lx\n", 1084 __func__, ipsec_address(&sav->sah->saidx.dst, buf, 1085 sizeof(buf)), (u_long) ntohl(sav->spi))); 1086 AH_STATINC(AH_STAT_WRAP); 1087 error = EINVAL; 1088 goto bad; 1089 } 1090 #ifdef IPSEC_DEBUG 1091 /* Emulate replay attack when ipsec_replay is TRUE. */ 1092 if (!ipsec_replay) 1093 #endif 1094 sav->replay->count++; 1095 ah->ah_seq = htonl(sav->replay->count); 1096 } 1097 1098 /* Get crypto descriptors. */ 1099 crp = crypto_getreq(1); 1100 if (crp == NULL) { 1101 DPRINTF(("%s: failed to acquire crypto descriptors\n", 1102 __func__)); 1103 AH_STATINC(AH_STAT_CRYPTO); 1104 error = ENOBUFS; 1105 goto bad; 1106 } 1107 1108 crda = crp->crp_desc; 1109 1110 crda->crd_skip = 0; 1111 crda->crd_inject = skip + rplen; 1112 crda->crd_len = m->m_pkthdr.len; 1113 1114 /* Authentication operation. */ 1115 crda->crd_alg = ahx->type; 1116 crda->crd_key = _KEYBUF(sav->key_auth); 1117 crda->crd_klen = _KEYBITS(sav->key_auth); 1118 1119 /* Allocate IPsec-specific opaque crypto info. */ 1120 tc = pool_cache_get(ah_tdb_crypto_pool_cache, PR_NOWAIT); 1121 if (tc == NULL) { 1122 crypto_freereq(crp); 1123 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 1124 AH_STATINC(AH_STAT_CRYPTO); 1125 error = ENOBUFS; 1126 goto bad; 1127 } 1128 1129 uint8_t *pext = (char *)(tc + 1); 1130 /* Save the skipped portion of the packet. */ 1131 m_copydata(m, 0, skip, pext); 1132 1133 /* 1134 * Fix IP header length on the header used for 1135 * authentication. We don't need to fix the original 1136 * header length as it will be fixed by our caller. 1137 */ 1138 memcpy(&iplen, pext + ipoffs, sizeof(iplen)); 1139 iplen = htons(ntohs(iplen) + rplen + authsize); 1140 m_copyback(m, ipoffs, sizeof(iplen), &iplen); 1141 1142 /* Fix the Next Header field in saved header. */ 1143 pext[protoff] = IPPROTO_AH; 1144 1145 /* Update the Next Protocol field in the IP header. */ 1146 prot = IPPROTO_AH; 1147 m_copyback(m, protoff, sizeof(prot), &prot); 1148 1149 /* "Massage" the packet headers for crypto processing. */ 1150 error = ah_massage_headers(&m, sav->sah->saidx.dst.sa.sa_family, 1151 skip, ahx->type, 1); 1152 if (error != 0) { 1153 m = NULL; /* mbuf was free'd by ah_massage_headers. */ 1154 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 1155 crypto_freereq(crp); 1156 goto bad; 1157 } 1158 1159 { 1160 int s = pserialize_read_enter(); 1161 1162 /* 1163 * Take another reference to the SP and the SA for opencrypto callback. 1164 */ 1165 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 1166 sav->state == SADB_SASTATE_DEAD)) { 1167 pserialize_read_exit(s); 1168 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 1169 crypto_freereq(crp); 1170 AH_STATINC(AH_STAT_NOTDB); 1171 error = ENOENT; 1172 goto bad; 1173 } 1174 KEY_SP_REF(isr->sp); 1175 KEY_SA_REF(sav); 1176 pserialize_read_exit(s); 1177 } 1178 1179 /* Crypto operation descriptor. */ 1180 crp->crp_ilen = m->m_pkthdr.len; /* Total input length. */ 1181 crp->crp_flags = CRYPTO_F_IMBUF; 1182 crp->crp_buf = m; 1183 crp->crp_callback = ah_output_cb; 1184 crp->crp_sid = sav->tdb_cryptoid; 1185 crp->crp_opaque = tc; 1186 1187 /* These are passed as-is to the callback. */ 1188 tc->tc_isr = isr; 1189 tc->tc_spi = sav->spi; 1190 tc->tc_dst = sav->sah->saidx.dst; 1191 tc->tc_proto = sav->sah->saidx.proto; 1192 tc->tc_skip = skip; 1193 tc->tc_protoff = protoff; 1194 tc->tc_sav = sav; 1195 1196 return crypto_dispatch(crp); 1197 bad: 1198 if (m) 1199 m_freem(m); 1200 return (error); 1201 } 1202 1203 /* 1204 * AH output callback from the crypto driver. 1205 */ 1206 static int 1207 ah_output_cb(struct cryptop *crp) 1208 { 1209 int skip, error; 1210 struct tdb_crypto *tc; 1211 const struct ipsecrequest *isr; 1212 struct secasvar *sav; 1213 struct mbuf *m; 1214 void *ptr; 1215 int err; 1216 IPSEC_DECLARE_LOCK_VARIABLE; 1217 1218 KASSERT(crp->crp_opaque != NULL); 1219 tc = crp->crp_opaque; 1220 skip = tc->tc_skip; 1221 ptr = (tc + 1); 1222 m = crp->crp_buf; 1223 1224 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 1225 1226 isr = tc->tc_isr; 1227 sav = tc->tc_sav; 1228 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD)) { 1229 AH_STATINC(AH_STAT_NOTDB); 1230 IPSECLOG(LOG_DEBUG, 1231 "SP is being destroyed while in crypto (id=%u)\n", 1232 isr->sp->id); 1233 error = ENOENT; 1234 goto bad; 1235 } 1236 if (__predict_false(!SADB_SASTATE_USABLE_P(sav))) { 1237 KEY_SA_UNREF(&sav); 1238 sav = KEY_LOOKUP_SA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 1239 if (sav == NULL) { 1240 AH_STATINC(AH_STAT_NOTDB); 1241 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 1242 error = ENOBUFS; /*XXX*/ 1243 goto bad; 1244 } 1245 } 1246 1247 /* Check for crypto errors. */ 1248 if (crp->crp_etype) { 1249 if (sav->tdb_cryptoid != 0) 1250 sav->tdb_cryptoid = crp->crp_sid; 1251 1252 if (crp->crp_etype == EAGAIN) { 1253 IPSEC_RELEASE_GLOBAL_LOCKS(); 1254 return crypto_dispatch(crp); 1255 } 1256 1257 AH_STATINC(AH_STAT_NOXFORM); 1258 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 1259 error = crp->crp_etype; 1260 goto bad; 1261 } 1262 1263 AH_STATINC(AH_STAT_HIST + ah_stats[sav->alg_auth]); 1264 1265 /* 1266 * Copy original headers (with the new protocol number) back 1267 * in place. 1268 */ 1269 m_copyback(m, 0, skip, ptr); 1270 1271 /* No longer needed. */ 1272 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 1273 crypto_freereq(crp); 1274 1275 #ifdef IPSEC_DEBUG 1276 /* Emulate man-in-the-middle attack when ipsec_integrity is TRUE. */ 1277 if (ipsec_integrity) { 1278 int alen; 1279 1280 /* 1281 * Corrupt HMAC if we want to test integrity verification of 1282 * the other side. 1283 */ 1284 alen = AUTHSIZE(sav); 1285 m_copyback(m, m->m_pkthdr.len - alen, alen, ipseczeroes); 1286 } 1287 #endif 1288 1289 /* NB: m is reclaimed by ipsec_process_done. */ 1290 err = ipsec_process_done(m, isr, sav); 1291 KEY_SA_UNREF(&sav); 1292 KEY_SP_UNREF(&isr->sp); 1293 IPSEC_RELEASE_GLOBAL_LOCKS(); 1294 return err; 1295 bad: 1296 if (sav) 1297 KEY_SA_UNREF(&sav); 1298 KEY_SP_UNREF(&isr->sp); 1299 IPSEC_RELEASE_GLOBAL_LOCKS(); 1300 if (m) 1301 m_freem(m); 1302 pool_cache_put(ah_tdb_crypto_pool_cache, tc); 1303 crypto_freereq(crp); 1304 return error; 1305 } 1306 1307 static struct xformsw ah_xformsw = { 1308 .xf_type = XF_AH, 1309 .xf_flags = XFT_AUTH, 1310 .xf_name = "IPsec AH", 1311 .xf_init = ah_init, 1312 .xf_zeroize = ah_zeroize, 1313 .xf_input = ah_input, 1314 .xf_output = ah_output, 1315 .xf_next = NULL, 1316 }; 1317 1318 void 1319 ah_attach(void) 1320 { 1321 ahstat_percpu = percpu_alloc(sizeof(uint64_t) * AH_NSTATS); 1322 1323 #define MAXAUTHSIZE(name) \ 1324 if ((auth_hash_ ## name).authsize > ah_max_authsize) \ 1325 ah_max_authsize = (auth_hash_ ## name).authsize 1326 1327 ah_max_authsize = 0; 1328 MAXAUTHSIZE(null); 1329 MAXAUTHSIZE(md5); 1330 MAXAUTHSIZE(sha1); 1331 MAXAUTHSIZE(key_md5); 1332 MAXAUTHSIZE(key_sha1); 1333 MAXAUTHSIZE(hmac_md5); 1334 MAXAUTHSIZE(hmac_sha1); 1335 MAXAUTHSIZE(hmac_ripemd_160); 1336 MAXAUTHSIZE(hmac_md5_96); 1337 MAXAUTHSIZE(hmac_sha1_96); 1338 MAXAUTHSIZE(hmac_ripemd_160_96); 1339 MAXAUTHSIZE(hmac_sha2_256); 1340 MAXAUTHSIZE(hmac_sha2_384); 1341 MAXAUTHSIZE(hmac_sha2_512); 1342 MAXAUTHSIZE(aes_xcbc_mac_96); 1343 MAXAUTHSIZE(gmac_aes_128); 1344 MAXAUTHSIZE(gmac_aes_192); 1345 MAXAUTHSIZE(gmac_aes_256); 1346 IPSECLOG(LOG_DEBUG, "ah_max_authsize=%d\n", ah_max_authsize); 1347 1348 #undef MAXAUTHSIZE 1349 1350 ah_pool_item_size = sizeof(struct tdb_crypto) + 1351 sizeof(struct ip) + MAX_IPOPTLEN + 1352 sizeof(struct ah) + sizeof(uint32_t) + ah_max_authsize; 1353 ah_tdb_crypto_pool_cache = pool_cache_init(ah_pool_item_size, 1354 coherency_unit, 0, 0, "ah_tdb_crypto", NULL, IPL_SOFTNET, 1355 NULL, NULL, NULL); 1356 1357 xform_register(&ah_xformsw); 1358 } 1359