1 /* $NetBSD: isakmp_ident.c,v 1.6 2006/10/02 21:41:59 manu Exp $ */ 2 3 /* Id: isakmp_ident.c,v 1.21 2006/04/06 16:46:08 manubsd Exp */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* Identity Protecion Exchange (Main Mode) */ 35 36 #include "config.h" 37 38 #include <sys/types.h> 39 #include <sys/param.h> 40 41 #include <stdlib.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <errno.h> 45 #if TIME_WITH_SYS_TIME 46 # include <sys/time.h> 47 # include <time.h> 48 #else 49 # if HAVE_SYS_TIME_H 50 # include <sys/time.h> 51 # else 52 # include <time.h> 53 # endif 54 #endif 55 56 #include "var.h" 57 #include "misc.h" 58 #include "vmbuf.h" 59 #include "plog.h" 60 #include "sockmisc.h" 61 #include "schedule.h" 62 #include "debug.h" 63 64 #include "localconf.h" 65 #include "remoteconf.h" 66 #include "isakmp_var.h" 67 #include "isakmp.h" 68 #include "evt.h" 69 #include "oakley.h" 70 #include "handler.h" 71 #include "ipsec_doi.h" 72 #include "crypto_openssl.h" 73 #include "pfkey.h" 74 #include "isakmp_ident.h" 75 #include "isakmp_inf.h" 76 #include "vendorid.h" 77 78 #ifdef ENABLE_NATT 79 #include "nattraversal.h" 80 #endif 81 #ifdef HAVE_GSSAPI 82 #include "gssapi.h" 83 #endif 84 #ifdef ENABLE_HYBRID 85 #include <resolv.h> 86 #include "isakmp_xauth.h" 87 #include "isakmp_cfg.h" 88 #endif 89 #ifdef ENABLE_FRAG 90 #include "isakmp_frag.h" 91 #endif 92 93 static vchar_t *ident_ir2mx __P((struct ph1handle *)); 94 static vchar_t *ident_ir3mx __P((struct ph1handle *)); 95 96 /* %%% 97 * begin Identity Protection Mode as initiator. 98 */ 99 /* 100 * send to responder 101 * psk: HDR, SA 102 * sig: HDR, SA 103 * rsa: HDR, SA 104 * rev: HDR, SA 105 */ 106 int 107 ident_i1send(iph1, msg) 108 struct ph1handle *iph1; 109 vchar_t *msg; /* must be null */ 110 { 111 struct payload_list *plist = NULL; 112 int error = -1; 113 #ifdef ENABLE_NATT 114 vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL }; 115 int i; 116 #endif 117 #ifdef ENABLE_HYBRID 118 vchar_t *vid_xauth = NULL; 119 vchar_t *vid_unity = NULL; 120 #endif 121 #ifdef ENABLE_FRAG 122 vchar_t *vid_frag = NULL; 123 #endif 124 #ifdef ENABLE_DPD 125 vchar_t *vid_dpd = NULL; 126 #endif 127 /* validity check */ 128 if (msg != NULL) { 129 plog(LLV_ERROR, LOCATION, NULL, 130 "msg has to be NULL in this function.\n"); 131 goto end; 132 } 133 if (iph1->status != PHASE1ST_START) { 134 plog(LLV_ERROR, LOCATION, NULL, 135 "status mismatched %d.\n", iph1->status); 136 goto end; 137 } 138 139 /* create isakmp index */ 140 memset(&iph1->index, 0, sizeof(iph1->index)); 141 isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local); 142 143 /* create SA payload for my proposal */ 144 iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal); 145 if (iph1->sa == NULL) 146 goto end; 147 148 /* set SA payload to propose */ 149 plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA); 150 151 #ifdef ENABLE_NATT 152 /* set VID payload for NAT-T if NAT-T support allowed in the config file */ 153 if (iph1->rmconf->nat_traversal) 154 plist = isakmp_plist_append_natt_vids(plist, vid_natt); 155 #endif 156 #ifdef ENABLE_HYBRID 157 /* Do we need Xauth VID? */ 158 switch (RMAUTHMETHOD(iph1)) { 159 case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I: 160 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: 161 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: 162 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: 163 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: 164 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: 165 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: 166 if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) 167 plog(LLV_ERROR, LOCATION, NULL, 168 "Xauth vendor ID generation failed\n"); 169 else 170 plist = isakmp_plist_append(plist, 171 vid_xauth, ISAKMP_NPTYPE_VID); 172 173 if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) 174 plog(LLV_ERROR, LOCATION, NULL, 175 "Unity vendor ID generation failed\n"); 176 else 177 plist = isakmp_plist_append(plist, 178 vid_unity, ISAKMP_NPTYPE_VID); 179 break; 180 default: 181 break; 182 } 183 #endif 184 #ifdef ENABLE_FRAG 185 if (iph1->rmconf->ike_frag) { 186 if ((vid_frag = set_vendorid(VENDORID_FRAG)) == NULL) { 187 plog(LLV_ERROR, LOCATION, NULL, 188 "Frag vendorID construction failed\n"); 189 } else { 190 vid_frag = isakmp_frag_addcap(vid_frag, 191 VENDORID_FRAG_IDENT); 192 plist = isakmp_plist_append(plist, 193 vid_frag, ISAKMP_NPTYPE_VID); 194 } 195 } 196 #endif 197 #ifdef ENABLE_DPD 198 if(iph1->rmconf->dpd){ 199 vid_dpd = set_vendorid(VENDORID_DPD); 200 if (vid_dpd != NULL) 201 plist = isakmp_plist_append(plist, vid_dpd, 202 ISAKMP_NPTYPE_VID); 203 } 204 #endif 205 206 iph1->sendbuf = isakmp_plist_set_all (&plist, iph1); 207 208 #ifdef HAVE_PRINT_ISAKMP_C 209 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); 210 #endif 211 212 /* send the packet, add to the schedule to resend */ 213 iph1->retry_counter = iph1->rmconf->retry_counter; 214 if (isakmp_ph1resend(iph1) == -1) 215 goto end; 216 217 iph1->status = PHASE1ST_MSG1SENT; 218 219 error = 0; 220 221 end: 222 #ifdef ENABLE_FRAG 223 if (vid_frag) 224 vfree(vid_frag); 225 #endif 226 #ifdef ENABLE_NATT 227 for (i = 0; i < MAX_NATT_VID_COUNT && vid_natt[i] != NULL; i++) 228 vfree(vid_natt[i]); 229 #endif 230 #ifdef ENABLE_HYBRID 231 if (vid_xauth != NULL) 232 vfree(vid_xauth); 233 if (vid_unity != NULL) 234 vfree(vid_unity); 235 #endif 236 #ifdef ENABLE_DPD 237 if (vid_dpd != NULL) 238 vfree(vid_dpd); 239 #endif 240 241 return error; 242 } 243 244 /* 245 * receive from responder 246 * psk: HDR, SA 247 * sig: HDR, SA 248 * rsa: HDR, SA 249 * rev: HDR, SA 250 */ 251 int 252 ident_i2recv(iph1, msg) 253 struct ph1handle *iph1; 254 vchar_t *msg; 255 { 256 vchar_t *pbuf = NULL; 257 struct isakmp_parse_t *pa; 258 vchar_t *satmp = NULL; 259 int error = -1; 260 int vid_numeric; 261 262 /* validity check */ 263 if (iph1->status != PHASE1ST_MSG1SENT) { 264 plog(LLV_ERROR, LOCATION, NULL, 265 "status mismatched %d.\n", iph1->status); 266 goto end; 267 } 268 269 /* validate the type of next payload */ 270 /* 271 * NOTE: RedCreek(as responder) attaches N[responder-lifetime] here, 272 * if proposal-lifetime > lifetime-redcreek-wants. 273 * (see doi-08 4.5.4) 274 * => According to the seciton 4.6.3 in RFC 2407, This is illegal. 275 * NOTE: we do not really care about ordering of VID and N. 276 * does it matters? 277 * NOTE: even if there's multiple VID/N, we'll ignore them. 278 */ 279 pbuf = isakmp_parse(msg); 280 if (pbuf == NULL) 281 goto end; 282 pa = (struct isakmp_parse_t *)pbuf->v; 283 284 /* SA payload is fixed postion */ 285 if (pa->type != ISAKMP_NPTYPE_SA) { 286 plog(LLV_ERROR, LOCATION, iph1->remote, 287 "received invalid next payload type %d, " 288 "expecting %d.\n", 289 pa->type, ISAKMP_NPTYPE_SA); 290 goto end; 291 } 292 if (isakmp_p2ph(&satmp, pa->ptr) < 0) 293 goto end; 294 pa++; 295 296 for (/*nothing*/; 297 pa->type != ISAKMP_NPTYPE_NONE; 298 pa++) { 299 300 switch (pa->type) { 301 case ISAKMP_NPTYPE_VID: 302 vid_numeric = check_vendorid(pa->ptr); 303 #ifdef ENABLE_NATT 304 if (iph1->rmconf->nat_traversal && natt_vendorid(vid_numeric)) 305 natt_handle_vendorid(iph1, vid_numeric); 306 #endif 307 #ifdef ENABLE_HYBRID 308 switch (vid_numeric) { 309 case VENDORID_XAUTH: 310 iph1->mode_cfg->flags |= 311 ISAKMP_CFG_VENDORID_XAUTH; 312 break; 313 314 case VENDORID_UNITY: 315 iph1->mode_cfg->flags |= 316 ISAKMP_CFG_VENDORID_UNITY; 317 break; 318 319 default: 320 break; 321 } 322 #endif 323 #ifdef ENABLE_DPD 324 if (vid_numeric == VENDORID_DPD && iph1->rmconf->dpd) 325 iph1->dpd_support=1; 326 #endif 327 break; 328 default: 329 /* don't send information, see ident_r1recv() */ 330 plog(LLV_ERROR, LOCATION, iph1->remote, 331 "ignore the packet, " 332 "received unexpecting payload type %d.\n", 333 pa->type); 334 goto end; 335 } 336 } 337 338 #ifdef ENABLE_NATT 339 if (NATT_AVAILABLE(iph1)) 340 plog(LLV_INFO, LOCATION, iph1->remote, 341 "Selected NAT-T version: %s\n", 342 vid_string_by_id(iph1->natt_options->version)); 343 #endif 344 345 /* check SA payload and set approval SA for use */ 346 if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) { 347 plog(LLV_ERROR, LOCATION, iph1->remote, 348 "failed to get valid proposal.\n"); 349 /* XXX send information */ 350 goto end; 351 } 352 VPTRINIT(iph1->sa_ret); 353 354 iph1->status = PHASE1ST_MSG2RECEIVED; 355 356 error = 0; 357 358 end: 359 if (pbuf) 360 vfree(pbuf); 361 if (satmp) 362 vfree(satmp); 363 return error; 364 } 365 366 /* 367 * send to responder 368 * psk: HDR, KE, Ni 369 * sig: HDR, KE, Ni 370 * gssapi: HDR, KE, Ni, GSSi 371 * rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r 372 * rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i, 373 * <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i] 374 */ 375 int 376 ident_i2send(iph1, msg) 377 struct ph1handle *iph1; 378 vchar_t *msg; 379 { 380 int error = -1; 381 382 /* validity check */ 383 if (iph1->status != PHASE1ST_MSG2RECEIVED) { 384 plog(LLV_ERROR, LOCATION, NULL, 385 "status mismatched %d.\n", iph1->status); 386 goto end; 387 } 388 389 /* fix isakmp index */ 390 memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck, 391 sizeof(cookie_t)); 392 393 /* generate DH public value */ 394 if (oakley_dh_generate(iph1->approval->dhgrp, 395 &iph1->dhpub, &iph1->dhpriv) < 0) 396 goto end; 397 398 /* generate NONCE value */ 399 iph1->nonce = eay_set_random(iph1->rmconf->nonce_size); 400 if (iph1->nonce == NULL) 401 goto end; 402 403 #ifdef HAVE_GSSAPI 404 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB && 405 gssapi_get_itoken(iph1, NULL) < 0) 406 goto end; 407 #endif 408 409 /* create buffer to send isakmp payload */ 410 iph1->sendbuf = ident_ir2mx(iph1); 411 if (iph1->sendbuf == NULL) 412 goto end; 413 414 #ifdef HAVE_PRINT_ISAKMP_C 415 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); 416 #endif 417 418 /* send the packet, add to the schedule to resend */ 419 iph1->retry_counter = iph1->rmconf->retry_counter; 420 if (isakmp_ph1resend(iph1) == -1) 421 goto end; 422 423 /* the sending message is added to the received-list. */ 424 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { 425 plog(LLV_ERROR , LOCATION, NULL, 426 "failed to add a response packet to the tree.\n"); 427 goto end; 428 } 429 430 iph1->status = PHASE1ST_MSG2SENT; 431 432 error = 0; 433 434 end: 435 return error; 436 } 437 438 /* 439 * receive from responder 440 * psk: HDR, KE, Nr 441 * sig: HDR, KE, Nr [, CR ] 442 * gssapi: HDR, KE, Nr, GSSr 443 * rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i 444 * rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r, 445 */ 446 int 447 ident_i3recv(iph1, msg) 448 struct ph1handle *iph1; 449 vchar_t *msg; 450 { 451 vchar_t *pbuf = NULL; 452 struct isakmp_parse_t *pa; 453 int error = -1; 454 #ifdef HAVE_GSSAPI 455 vchar_t *gsstoken = NULL; 456 #endif 457 #ifdef ENABLE_NATT 458 vchar_t *natd_received; 459 int natd_seq = 0, natd_verified; 460 #endif 461 462 /* validity check */ 463 if (iph1->status != PHASE1ST_MSG2SENT) { 464 plog(LLV_ERROR, LOCATION, NULL, 465 "status mismatched %d.\n", iph1->status); 466 goto end; 467 } 468 469 /* validate the type of next payload */ 470 pbuf = isakmp_parse(msg); 471 if (pbuf == NULL) 472 goto end; 473 474 for (pa = (struct isakmp_parse_t *)pbuf->v; 475 pa->type != ISAKMP_NPTYPE_NONE; 476 pa++) { 477 478 switch (pa->type) { 479 case ISAKMP_NPTYPE_KE: 480 if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0) 481 goto end; 482 break; 483 case ISAKMP_NPTYPE_NONCE: 484 if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0) 485 goto end; 486 break; 487 case ISAKMP_NPTYPE_VID: 488 (void)check_vendorid(pa->ptr); 489 break; 490 case ISAKMP_NPTYPE_CR: 491 if (oakley_savecr(iph1, pa->ptr) < 0) 492 goto end; 493 break; 494 #ifdef HAVE_GSSAPI 495 case ISAKMP_NPTYPE_GSS: 496 if (isakmp_p2ph(&gsstoken, pa->ptr) < 0) 497 goto end; 498 gssapi_save_received_token(iph1, gsstoken); 499 break; 500 #endif 501 502 #ifdef ENABLE_NATT 503 case ISAKMP_NPTYPE_NATD_DRAFT: 504 case ISAKMP_NPTYPE_NATD_RFC: 505 if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL && 506 pa->type == iph1->natt_options->payload_nat_d) { 507 natd_received = NULL; 508 if (isakmp_p2ph (&natd_received, pa->ptr) < 0) 509 goto end; 510 511 /* set both bits first so that we can clear them 512 upon verifying hashes */ 513 if (natd_seq == 0) 514 iph1->natt_flags |= NAT_DETECTED; 515 516 /* this function will clear appropriate bits bits 517 from iph1->natt_flags */ 518 natd_verified = natt_compare_addr_hash (iph1, 519 natd_received, natd_seq++); 520 521 plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n", 522 natd_seq - 1, 523 natd_verified ? "verified" : "doesn't match"); 524 525 vfree (natd_received); 526 break; 527 } 528 /* passthrough to default... */ 529 #endif 530 531 default: 532 /* don't send information, see ident_r1recv() */ 533 plog(LLV_ERROR, LOCATION, iph1->remote, 534 "ignore the packet, " 535 "received unexpecting payload type %d.\n", 536 pa->type); 537 goto end; 538 } 539 } 540 541 #ifdef ENABLE_NATT 542 if (NATT_AVAILABLE(iph1)) { 543 plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n", 544 iph1->natt_flags & NAT_DETECTED ? 545 "detected:" : "not detected", 546 iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "", 547 iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : ""); 548 if (iph1->natt_flags & NAT_DETECTED) 549 natt_float_ports (iph1); 550 } 551 #endif 552 553 /* payload existency check */ 554 if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) { 555 plog(LLV_ERROR, LOCATION, iph1->remote, 556 "few isakmp message received.\n"); 557 goto end; 558 } 559 560 if (oakley_checkcr(iph1) < 0) { 561 /* Ignore this error in order to be interoperability. */ 562 ; 563 } 564 565 iph1->status = PHASE1ST_MSG3RECEIVED; 566 567 error = 0; 568 569 end: 570 #ifdef HAVE_GSSAPI 571 if (gsstoken) 572 vfree(gsstoken); 573 #endif 574 if (pbuf) 575 vfree(pbuf); 576 if (error) { 577 VPTRINIT(iph1->dhpub_p); 578 VPTRINIT(iph1->nonce_p); 579 VPTRINIT(iph1->id_p); 580 oakley_delcert(iph1->cr_p); 581 iph1->cr_p = NULL; 582 } 583 584 return error; 585 } 586 587 /* 588 * send to responder 589 * psk: HDR*, IDi1, HASH_I 590 * sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I 591 * gssapi: HDR*, IDi1, < Gssi(n) | HASH_I > 592 * rsa: HDR*, HASH_I 593 * rev: HDR*, HASH_I 594 */ 595 int 596 ident_i3send(iph1, msg0) 597 struct ph1handle *iph1; 598 vchar_t *msg0; 599 { 600 int error = -1; 601 int dohash = 1; 602 #ifdef HAVE_GSSAPI 603 int len; 604 #endif 605 606 /* validity check */ 607 if (iph1->status != PHASE1ST_MSG3RECEIVED) { 608 plog(LLV_ERROR, LOCATION, NULL, 609 "status mismatched %d.\n", iph1->status); 610 goto end; 611 } 612 613 /* compute sharing secret of DH */ 614 if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub, 615 iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0) 616 goto end; 617 618 /* generate SKEYIDs & IV & final cipher key */ 619 if (oakley_skeyid(iph1) < 0) 620 goto end; 621 if (oakley_skeyid_dae(iph1) < 0) 622 goto end; 623 if (oakley_compute_enckey(iph1) < 0) 624 goto end; 625 if (oakley_newiv(iph1) < 0) 626 goto end; 627 628 /* make ID payload into isakmp status */ 629 if (ipsecdoi_setid1(iph1) < 0) 630 goto end; 631 632 #ifdef HAVE_GSSAPI 633 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB && 634 gssapi_more_tokens(iph1)) { 635 plog(LLV_DEBUG, LOCATION, NULL, "calling get_itoken\n"); 636 if (gssapi_get_itoken(iph1, &len) < 0) 637 goto end; 638 if (len != 0) 639 dohash = 0; 640 } 641 #endif 642 643 /* generate HASH to send */ 644 if (dohash) { 645 iph1->hash = oakley_ph1hash_common(iph1, GENERATE); 646 if (iph1->hash == NULL) 647 goto end; 648 } else 649 iph1->hash = NULL; 650 651 /* set encryption flag */ 652 iph1->flags |= ISAKMP_FLAG_E; 653 654 /* create HDR;ID;HASH payload */ 655 iph1->sendbuf = ident_ir3mx(iph1); 656 if (iph1->sendbuf == NULL) 657 goto end; 658 659 /* send the packet, add to the schedule to resend */ 660 iph1->retry_counter = iph1->rmconf->retry_counter; 661 if (isakmp_ph1resend(iph1) == -1) 662 goto end; 663 664 /* the sending message is added to the received-list. */ 665 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg0) == -1) { 666 plog(LLV_ERROR , LOCATION, NULL, 667 "failed to add a response packet to the tree.\n"); 668 goto end; 669 } 670 671 /* see handler.h about IV synchronization. */ 672 memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l); 673 674 iph1->status = PHASE1ST_MSG3SENT; 675 676 error = 0; 677 678 end: 679 return error; 680 } 681 682 /* 683 * receive from responder 684 * psk: HDR*, IDr1, HASH_R 685 * sig: HDR*, IDr1, [ CERT, ] SIG_R 686 * gssapi: HDR*, IDr1, < GSSr(n) | HASH_R > 687 * rsa: HDR*, HASH_R 688 * rev: HDR*, HASH_R 689 */ 690 int 691 ident_i4recv(iph1, msg0) 692 struct ph1handle *iph1; 693 vchar_t *msg0; 694 { 695 vchar_t *pbuf = NULL; 696 struct isakmp_parse_t *pa; 697 vchar_t *msg = NULL; 698 int error = -1; 699 int type; 700 #ifdef HAVE_GSSAPI 701 vchar_t *gsstoken = NULL; 702 #endif 703 704 /* validity check */ 705 if (iph1->status != PHASE1ST_MSG3SENT) { 706 plog(LLV_ERROR, LOCATION, NULL, 707 "status mismatched %d.\n", iph1->status); 708 goto end; 709 } 710 711 /* decrypting */ 712 if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { 713 plog(LLV_ERROR, LOCATION, iph1->remote, 714 "ignore the packet, " 715 "expecting the packet encrypted.\n"); 716 goto end; 717 } 718 msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive); 719 if (msg == NULL) 720 goto end; 721 722 /* validate the type of next payload */ 723 pbuf = isakmp_parse(msg); 724 if (pbuf == NULL) 725 goto end; 726 727 iph1->pl_hash = NULL; 728 729 for (pa = (struct isakmp_parse_t *)pbuf->v; 730 pa->type != ISAKMP_NPTYPE_NONE; 731 pa++) { 732 733 switch (pa->type) { 734 case ISAKMP_NPTYPE_ID: 735 if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0) 736 goto end; 737 break; 738 case ISAKMP_NPTYPE_HASH: 739 iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr; 740 break; 741 case ISAKMP_NPTYPE_CERT: 742 if (oakley_savecert(iph1, pa->ptr) < 0) 743 goto end; 744 break; 745 case ISAKMP_NPTYPE_SIG: 746 if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0) 747 goto end; 748 break; 749 #ifdef HAVE_GSSAPI 750 case ISAKMP_NPTYPE_GSS: 751 if (isakmp_p2ph(&gsstoken, pa->ptr) < 0) 752 goto end; 753 gssapi_save_received_token(iph1, gsstoken); 754 break; 755 #endif 756 case ISAKMP_NPTYPE_VID: 757 (void)check_vendorid(pa->ptr); 758 break; 759 case ISAKMP_NPTYPE_N: 760 isakmp_check_notify(pa->ptr, iph1); 761 break; 762 default: 763 /* don't send information, see ident_r1recv() */ 764 plog(LLV_ERROR, LOCATION, iph1->remote, 765 "ignore the packet, " 766 "received unexpecting payload type %d.\n", 767 pa->type); 768 goto end; 769 } 770 } 771 772 /* payload existency check */ 773 774 /* verify identifier */ 775 if (ipsecdoi_checkid1(iph1) != 0) { 776 plog(LLV_ERROR, LOCATION, iph1->remote, 777 "invalid ID payload.\n"); 778 goto end; 779 } 780 781 /* validate authentication value */ 782 #ifdef HAVE_GSSAPI 783 if (gsstoken == NULL) { 784 #endif 785 type = oakley_validate_auth(iph1); 786 if (type != 0) { 787 if (type == -1) { 788 /* msg printed inner oakley_validate_auth() */ 789 goto end; 790 } 791 EVT_PUSH(iph1->local, iph1->remote, 792 EVTT_PEERPH1AUTH_FAILED, NULL); 793 isakmp_info_send_n1(iph1, type, NULL); 794 goto end; 795 } 796 #ifdef HAVE_GSSAPI 797 } 798 #endif 799 800 /* 801 * XXX: Should we do compare two addresses, ph1handle's and ID 802 * payload's. 803 */ 804 805 plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID:"); 806 plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l); 807 808 /* see handler.h about IV synchronization. */ 809 memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l); 810 811 /* 812 * If we got a GSS token, we need to this roundtrip again. 813 */ 814 #ifdef HAVE_GSSAPI 815 iph1->status = gsstoken != 0 ? PHASE1ST_MSG3RECEIVED : 816 PHASE1ST_MSG4RECEIVED; 817 #else 818 iph1->status = PHASE1ST_MSG4RECEIVED; 819 #endif 820 821 error = 0; 822 823 end: 824 if (pbuf) 825 vfree(pbuf); 826 if (msg) 827 vfree(msg); 828 #ifdef HAVE_GSSAPI 829 if (gsstoken) 830 vfree(gsstoken); 831 #endif 832 833 if (error) { 834 VPTRINIT(iph1->id_p); 835 oakley_delcert(iph1->cert_p); 836 iph1->cert_p = NULL; 837 oakley_delcert(iph1->crl_p); 838 iph1->crl_p = NULL; 839 VPTRINIT(iph1->sig_p); 840 } 841 842 return error; 843 } 844 845 /* 846 * status update and establish isakmp sa. 847 */ 848 int 849 ident_i4send(iph1, msg) 850 struct ph1handle *iph1; 851 vchar_t *msg; 852 { 853 int error = -1; 854 855 /* validity check */ 856 if (iph1->status != PHASE1ST_MSG4RECEIVED) { 857 plog(LLV_ERROR, LOCATION, NULL, 858 "status mismatched %d.\n", iph1->status); 859 goto end; 860 } 861 862 /* see handler.h about IV synchronization. */ 863 memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l); 864 865 iph1->status = PHASE1ST_ESTABLISHED; 866 867 error = 0; 868 869 end: 870 return error; 871 } 872 873 /* 874 * receive from initiator 875 * psk: HDR, SA 876 * sig: HDR, SA 877 * rsa: HDR, SA 878 * rev: HDR, SA 879 */ 880 int 881 ident_r1recv(iph1, msg) 882 struct ph1handle *iph1; 883 vchar_t *msg; 884 { 885 vchar_t *pbuf = NULL; 886 struct isakmp_parse_t *pa; 887 int error = -1; 888 int vid_numeric; 889 890 /* validity check */ 891 if (iph1->status != PHASE1ST_START) { 892 plog(LLV_ERROR, LOCATION, NULL, 893 "status mismatched %d.\n", iph1->status); 894 goto end; 895 } 896 897 /* validate the type of next payload */ 898 /* 899 * NOTE: XXX even if multiple VID, we'll silently ignore those. 900 */ 901 pbuf = isakmp_parse(msg); 902 if (pbuf == NULL) 903 goto end; 904 pa = (struct isakmp_parse_t *)pbuf->v; 905 906 /* check the position of SA payload */ 907 if (pa->type != ISAKMP_NPTYPE_SA) { 908 plog(LLV_ERROR, LOCATION, iph1->remote, 909 "received invalid next payload type %d, " 910 "expecting %d.\n", 911 pa->type, ISAKMP_NPTYPE_SA); 912 goto end; 913 } 914 if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0) 915 goto end; 916 pa++; 917 918 for (/*nothing*/; 919 pa->type != ISAKMP_NPTYPE_NONE; 920 pa++) { 921 922 switch (pa->type) { 923 case ISAKMP_NPTYPE_VID: 924 vid_numeric = check_vendorid(pa->ptr); 925 #ifdef ENABLE_NATT 926 if (iph1->rmconf->nat_traversal && natt_vendorid(vid_numeric)) 927 natt_handle_vendorid(iph1, vid_numeric); 928 #endif 929 #ifdef ENABLE_FRAG 930 if ((vid_numeric == VENDORID_FRAG) && 931 (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_IDENT)) 932 iph1->frag = 1; 933 #endif 934 #ifdef ENABLE_HYBRID 935 switch (vid_numeric) { 936 case VENDORID_XAUTH: 937 iph1->mode_cfg->flags |= 938 ISAKMP_CFG_VENDORID_XAUTH; 939 break; 940 941 case VENDORID_UNITY: 942 iph1->mode_cfg->flags |= 943 ISAKMP_CFG_VENDORID_UNITY; 944 break; 945 946 default: 947 break; 948 } 949 #endif 950 #ifdef ENABLE_DPD 951 if (vid_numeric == VENDORID_DPD && iph1->rmconf->dpd) 952 iph1->dpd_support=1; 953 #endif 954 break; 955 default: 956 /* 957 * We don't send information to the peer even 958 * if we received malformed packet. Because we 959 * can't distinguish the malformed packet and 960 * the re-sent packet. And we do same behavior 961 * when we expect encrypted packet. 962 */ 963 plog(LLV_ERROR, LOCATION, iph1->remote, 964 "ignore the packet, " 965 "received unexpecting payload type %d.\n", 966 pa->type); 967 goto end; 968 } 969 } 970 971 #ifdef ENABLE_NATT 972 if (NATT_AVAILABLE(iph1)) 973 plog(LLV_INFO, LOCATION, iph1->remote, 974 "Selected NAT-T version: %s\n", 975 vid_string_by_id(iph1->natt_options->version)); 976 #endif 977 978 /* check SA payload and set approval SA for use */ 979 if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) { 980 plog(LLV_ERROR, LOCATION, iph1->remote, 981 "failed to get valid proposal.\n"); 982 /* XXX send information */ 983 goto end; 984 } 985 986 iph1->status = PHASE1ST_MSG1RECEIVED; 987 988 error = 0; 989 990 end: 991 if (pbuf) 992 vfree(pbuf); 993 if (error) { 994 VPTRINIT(iph1->sa); 995 } 996 997 return error; 998 } 999 1000 /* 1001 * send to initiator 1002 * psk: HDR, SA 1003 * sig: HDR, SA 1004 * rsa: HDR, SA 1005 * rev: HDR, SA 1006 */ 1007 int 1008 ident_r1send(iph1, msg) 1009 struct ph1handle *iph1; 1010 vchar_t *msg; 1011 { 1012 struct payload_list *plist = NULL; 1013 int error = -1; 1014 vchar_t *gss_sa = NULL; 1015 #ifdef HAVE_GSSAPI 1016 int free_gss_sa = 0; 1017 #endif 1018 #ifdef ENABLE_NATT 1019 vchar_t *vid_natt = NULL; 1020 #endif 1021 #ifdef ENABLE_HYBRID 1022 vchar_t *vid_xauth = NULL; 1023 vchar_t *vid_unity = NULL; 1024 #endif 1025 #ifdef ENABLE_DPD 1026 vchar_t *vid_dpd = NULL; 1027 #endif 1028 #ifdef ENABLE_FRAG 1029 vchar_t *vid_frag = NULL; 1030 #endif 1031 1032 /* validity check */ 1033 if (iph1->status != PHASE1ST_MSG1RECEIVED) { 1034 plog(LLV_ERROR, LOCATION, NULL, 1035 "status mismatched %d.\n", iph1->status); 1036 goto end; 1037 } 1038 1039 /* set responder's cookie */ 1040 isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local); 1041 1042 #ifdef HAVE_GSSAPI 1043 if (iph1->approval->gssid != NULL) { 1044 gss_sa = ipsecdoi_setph1proposal(iph1->approval); 1045 if (gss_sa != iph1->sa_ret) 1046 free_gss_sa = 1; 1047 } else 1048 #endif 1049 gss_sa = iph1->sa_ret; 1050 1051 /* set SA payload to reply */ 1052 plist = isakmp_plist_append(plist, gss_sa, ISAKMP_NPTYPE_SA); 1053 1054 #ifdef ENABLE_HYBRID 1055 if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) { 1056 plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n"); 1057 if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) { 1058 plog(LLV_ERROR, LOCATION, NULL, 1059 "Cannot create Xauth vendor ID\n"); 1060 goto end; 1061 } 1062 plist = isakmp_plist_append(plist, 1063 vid_xauth, ISAKMP_NPTYPE_VID); 1064 } 1065 1066 if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) { 1067 if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) { 1068 plog(LLV_ERROR, LOCATION, NULL, 1069 "Cannot create Unity vendor ID\n"); 1070 goto end; 1071 } 1072 plist = isakmp_plist_append(plist, 1073 vid_unity, ISAKMP_NPTYPE_VID); 1074 } 1075 #endif 1076 #ifdef ENABLE_NATT 1077 /* Has the peer announced NAT-T? */ 1078 if (NATT_AVAILABLE(iph1)) 1079 vid_natt = set_vendorid(iph1->natt_options->version); 1080 1081 if (vid_natt) 1082 plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID); 1083 #endif 1084 #ifdef ENABLE_DPD 1085 /* XXX only send DPD VID if remote sent it ? */ 1086 if(iph1->rmconf->dpd){ 1087 vid_dpd = set_vendorid(VENDORID_DPD); 1088 if (vid_dpd != NULL) 1089 plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID); 1090 } 1091 #endif 1092 #ifdef ENABLE_FRAG 1093 if (iph1->frag) { 1094 vid_frag = set_vendorid(VENDORID_FRAG); 1095 if (vid_frag != NULL) 1096 vid_frag = isakmp_frag_addcap(vid_frag, 1097 VENDORID_FRAG_IDENT); 1098 if (vid_frag == NULL) 1099 plog(LLV_ERROR, LOCATION, NULL, 1100 "Frag vendorID construction failed\n"); 1101 else 1102 plist = isakmp_plist_append(plist, 1103 vid_frag, ISAKMP_NPTYPE_VID); 1104 } 1105 #endif 1106 1107 iph1->sendbuf = isakmp_plist_set_all (&plist, iph1); 1108 1109 #ifdef HAVE_PRINT_ISAKMP_C 1110 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); 1111 #endif 1112 1113 /* send the packet, add to the schedule to resend */ 1114 iph1->retry_counter = iph1->rmconf->retry_counter; 1115 if (isakmp_ph1resend(iph1) == -1) { 1116 goto end; 1117 } 1118 1119 /* the sending message is added to the received-list. */ 1120 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { 1121 plog(LLV_ERROR , LOCATION, NULL, 1122 "failed to add a response packet to the tree.\n"); 1123 goto end; 1124 } 1125 1126 iph1->status = PHASE1ST_MSG1SENT; 1127 1128 error = 0; 1129 1130 end: 1131 #ifdef HAVE_GSSAPI 1132 if (free_gss_sa) 1133 vfree(gss_sa); 1134 #endif 1135 #ifdef ENABLE_NATT 1136 if (vid_natt) 1137 vfree(vid_natt); 1138 #endif 1139 #ifdef ENABLE_HYBRID 1140 if (vid_xauth != NULL) 1141 vfree(vid_xauth); 1142 if (vid_unity != NULL) 1143 vfree(vid_unity); 1144 #endif 1145 #ifdef ENABLE_DPD 1146 if (vid_dpd != NULL) 1147 vfree(vid_dpd); 1148 #endif 1149 #ifdef ENABLE_FRAG 1150 if (vid_frag != NULL) 1151 vfree(vid_frag); 1152 #endif 1153 1154 return error; 1155 } 1156 1157 /* 1158 * receive from initiator 1159 * psk: HDR, KE, Ni 1160 * sig: HDR, KE, Ni 1161 * gssapi: HDR, KE, Ni, GSSi 1162 * rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r 1163 * rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i, 1164 * <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i] 1165 */ 1166 int 1167 ident_r2recv(iph1, msg) 1168 struct ph1handle *iph1; 1169 vchar_t *msg; 1170 { 1171 vchar_t *pbuf = NULL; 1172 struct isakmp_parse_t *pa; 1173 int error = -1; 1174 #ifdef HAVE_GSSAPI 1175 vchar_t *gsstoken = NULL; 1176 #endif 1177 #ifdef ENABLE_NATT 1178 int natd_seq = 0; 1179 #endif 1180 1181 /* validity check */ 1182 if (iph1->status != PHASE1ST_MSG1SENT) { 1183 plog(LLV_ERROR, LOCATION, NULL, 1184 "status mismatched %d.\n", iph1->status); 1185 goto end; 1186 } 1187 1188 /* validate the type of next payload */ 1189 pbuf = isakmp_parse(msg); 1190 if (pbuf == NULL) 1191 goto end; 1192 1193 for (pa = (struct isakmp_parse_t *)pbuf->v; 1194 pa->type != ISAKMP_NPTYPE_NONE; 1195 pa++) { 1196 switch (pa->type) { 1197 case ISAKMP_NPTYPE_KE: 1198 if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0) 1199 goto end; 1200 break; 1201 case ISAKMP_NPTYPE_NONCE: 1202 if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0) 1203 goto end; 1204 break; 1205 case ISAKMP_NPTYPE_VID: 1206 (void)check_vendorid(pa->ptr); 1207 break; 1208 case ISAKMP_NPTYPE_CR: 1209 plog(LLV_WARNING, LOCATION, iph1->remote, 1210 "CR received, ignore it. " 1211 "It should be in other exchange.\n"); 1212 break; 1213 #ifdef HAVE_GSSAPI 1214 case ISAKMP_NPTYPE_GSS: 1215 if (isakmp_p2ph(&gsstoken, pa->ptr) < 0) 1216 goto end; 1217 gssapi_save_received_token(iph1, gsstoken); 1218 break; 1219 #endif 1220 1221 #ifdef ENABLE_NATT 1222 case ISAKMP_NPTYPE_NATD_DRAFT: 1223 case ISAKMP_NPTYPE_NATD_RFC: 1224 if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL && 1225 pa->type == iph1->natt_options->payload_nat_d) 1226 { 1227 vchar_t *natd_received = NULL; 1228 int natd_verified; 1229 1230 if (isakmp_p2ph (&natd_received, pa->ptr) < 0) 1231 goto end; 1232 1233 if (natd_seq == 0) 1234 iph1->natt_flags |= NAT_DETECTED; 1235 1236 natd_verified = natt_compare_addr_hash (iph1, 1237 natd_received, natd_seq++); 1238 1239 plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n", 1240 natd_seq - 1, 1241 natd_verified ? "verified" : "doesn't match"); 1242 1243 vfree (natd_received); 1244 break; 1245 } 1246 /* passthrough to default... */ 1247 #endif 1248 1249 default: 1250 /* don't send information, see ident_r1recv() */ 1251 plog(LLV_ERROR, LOCATION, iph1->remote, 1252 "ignore the packet, " 1253 "received unexpecting payload type %d.\n", 1254 pa->type); 1255 goto end; 1256 } 1257 } 1258 1259 #ifdef ENABLE_NATT 1260 if (NATT_AVAILABLE(iph1)) 1261 plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n", 1262 iph1->natt_flags & NAT_DETECTED ? 1263 "detected:" : "not detected", 1264 iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "", 1265 iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : ""); 1266 #endif 1267 1268 /* payload existency check */ 1269 if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) { 1270 plog(LLV_ERROR, LOCATION, iph1->remote, 1271 "few isakmp message received.\n"); 1272 goto end; 1273 } 1274 1275 iph1->status = PHASE1ST_MSG2RECEIVED; 1276 1277 error = 0; 1278 1279 end: 1280 if (pbuf) 1281 vfree(pbuf); 1282 #ifdef HAVE_GSSAPI 1283 if (gsstoken) 1284 vfree(gsstoken); 1285 #endif 1286 1287 if (error) { 1288 VPTRINIT(iph1->dhpub_p); 1289 VPTRINIT(iph1->nonce_p); 1290 VPTRINIT(iph1->id_p); 1291 } 1292 1293 return error; 1294 } 1295 1296 /* 1297 * send to initiator 1298 * psk: HDR, KE, Nr 1299 * sig: HDR, KE, Nr [, CR ] 1300 * gssapi: HDR, KE, Nr, GSSr 1301 * rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i 1302 * rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r, 1303 */ 1304 int 1305 ident_r2send(iph1, msg) 1306 struct ph1handle *iph1; 1307 vchar_t *msg; 1308 { 1309 int error = -1; 1310 1311 /* validity check */ 1312 if (iph1->status != PHASE1ST_MSG2RECEIVED) { 1313 plog(LLV_ERROR, LOCATION, NULL, 1314 "status mismatched %d.\n", iph1->status); 1315 goto end; 1316 } 1317 1318 /* generate DH public value */ 1319 if (oakley_dh_generate(iph1->approval->dhgrp, 1320 &iph1->dhpub, &iph1->dhpriv) < 0) 1321 goto end; 1322 1323 /* generate NONCE value */ 1324 iph1->nonce = eay_set_random(iph1->rmconf->nonce_size); 1325 if (iph1->nonce == NULL) 1326 goto end; 1327 1328 #ifdef HAVE_GSSAPI 1329 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) 1330 gssapi_get_rtoken(iph1, NULL); 1331 #endif 1332 1333 /* create HDR;KE;NONCE payload */ 1334 iph1->sendbuf = ident_ir2mx(iph1); 1335 if (iph1->sendbuf == NULL) 1336 goto end; 1337 1338 #ifdef HAVE_PRINT_ISAKMP_C 1339 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); 1340 #endif 1341 1342 /* send the packet, add to the schedule to resend */ 1343 iph1->retry_counter = iph1->rmconf->retry_counter; 1344 if (isakmp_ph1resend(iph1) == -1) 1345 goto end; 1346 1347 /* the sending message is added to the received-list. */ 1348 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { 1349 plog(LLV_ERROR , LOCATION, NULL, 1350 "failed to add a response packet to the tree.\n"); 1351 goto end; 1352 } 1353 1354 /* compute sharing secret of DH */ 1355 if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub, 1356 iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0) 1357 goto end; 1358 1359 /* generate SKEYIDs & IV & final cipher key */ 1360 if (oakley_skeyid(iph1) < 0) 1361 goto end; 1362 if (oakley_skeyid_dae(iph1) < 0) 1363 goto end; 1364 if (oakley_compute_enckey(iph1) < 0) 1365 goto end; 1366 if (oakley_newiv(iph1) < 0) 1367 goto end; 1368 1369 iph1->status = PHASE1ST_MSG2SENT; 1370 1371 error = 0; 1372 1373 end: 1374 return error; 1375 } 1376 1377 /* 1378 * receive from initiator 1379 * psk: HDR*, IDi1, HASH_I 1380 * sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I 1381 * gssapi: HDR*, [ IDi1, ] < GSSi(n) | HASH_I > 1382 * rsa: HDR*, HASH_I 1383 * rev: HDR*, HASH_I 1384 */ 1385 int 1386 ident_r3recv(iph1, msg0) 1387 struct ph1handle *iph1; 1388 vchar_t *msg0; 1389 { 1390 vchar_t *msg = NULL; 1391 vchar_t *pbuf = NULL; 1392 struct isakmp_parse_t *pa; 1393 int error = -1; 1394 int type; 1395 #ifdef HAVE_GSSAPI 1396 vchar_t *gsstoken = NULL; 1397 #endif 1398 1399 /* validity check */ 1400 if (iph1->status != PHASE1ST_MSG2SENT) { 1401 plog(LLV_ERROR, LOCATION, NULL, 1402 "status mismatched %d.\n", iph1->status); 1403 goto end; 1404 } 1405 1406 /* decrypting */ 1407 if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { 1408 plog(LLV_ERROR, LOCATION, iph1->remote, 1409 "reject the packet, " 1410 "expecting the packet encrypted.\n"); 1411 goto end; 1412 } 1413 msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive); 1414 if (msg == NULL) 1415 goto end; 1416 1417 /* validate the type of next payload */ 1418 pbuf = isakmp_parse(msg); 1419 if (pbuf == NULL) 1420 goto end; 1421 1422 iph1->pl_hash = NULL; 1423 1424 for (pa = (struct isakmp_parse_t *)pbuf->v; 1425 pa->type != ISAKMP_NPTYPE_NONE; 1426 pa++) { 1427 1428 switch (pa->type) { 1429 case ISAKMP_NPTYPE_ID: 1430 if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0) 1431 goto end; 1432 break; 1433 case ISAKMP_NPTYPE_HASH: 1434 iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr; 1435 break; 1436 case ISAKMP_NPTYPE_CR: 1437 if (oakley_savecr(iph1, pa->ptr) < 0) 1438 goto end; 1439 break; 1440 case ISAKMP_NPTYPE_CERT: 1441 if (oakley_savecert(iph1, pa->ptr) < 0) 1442 goto end; 1443 break; 1444 case ISAKMP_NPTYPE_SIG: 1445 if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0) 1446 goto end; 1447 break; 1448 #ifdef HAVE_GSSAPI 1449 case ISAKMP_NPTYPE_GSS: 1450 if (isakmp_p2ph(&gsstoken, pa->ptr) < 0) 1451 goto end; 1452 gssapi_save_received_token(iph1, gsstoken); 1453 break; 1454 #endif 1455 case ISAKMP_NPTYPE_VID: 1456 (void)check_vendorid(pa->ptr); 1457 break; 1458 case ISAKMP_NPTYPE_N: 1459 isakmp_check_notify(pa->ptr, iph1); 1460 break; 1461 default: 1462 /* don't send information, see ident_r1recv() */ 1463 plog(LLV_ERROR, LOCATION, iph1->remote, 1464 "ignore the packet, " 1465 "received unexpecting payload type %d.\n", 1466 pa->type); 1467 goto end; 1468 } 1469 } 1470 1471 /* payload existency check */ 1472 /* XXX same as ident_i4recv(), should be merged. */ 1473 { 1474 int ng = 0; 1475 1476 switch (AUTHMETHOD(iph1)) { 1477 case OAKLEY_ATTR_AUTH_METHOD_PSKEY: 1478 #ifdef ENABLE_HYBRID 1479 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: 1480 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: 1481 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: 1482 #endif 1483 if (iph1->id_p == NULL || iph1->pl_hash == NULL) 1484 ng++; 1485 break; 1486 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: 1487 case OAKLEY_ATTR_AUTH_METHOD_RSASIG: 1488 #ifdef ENABLE_HYBRID 1489 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: 1490 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: 1491 #endif 1492 if (iph1->id_p == NULL || iph1->sig_p == NULL) 1493 ng++; 1494 break; 1495 case OAKLEY_ATTR_AUTH_METHOD_RSAENC: 1496 case OAKLEY_ATTR_AUTH_METHOD_RSAREV: 1497 #ifdef ENABLE_HYBRID 1498 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: 1499 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: 1500 #endif 1501 if (iph1->pl_hash == NULL) 1502 ng++; 1503 break; 1504 #ifdef HAVE_GSSAPI 1505 case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: 1506 if (gsstoken == NULL && iph1->pl_hash == NULL) 1507 ng++; 1508 break; 1509 #endif 1510 default: 1511 plog(LLV_ERROR, LOCATION, iph1->remote, 1512 "invalid authmethod %d why ?\n", 1513 iph1->approval->authmethod); 1514 goto end; 1515 } 1516 if (ng) { 1517 plog(LLV_ERROR, LOCATION, iph1->remote, 1518 "few isakmp message received.\n"); 1519 goto end; 1520 } 1521 } 1522 1523 /* verify identifier */ 1524 if (ipsecdoi_checkid1(iph1) != 0) { 1525 plog(LLV_ERROR, LOCATION, iph1->remote, 1526 "invalid ID payload.\n"); 1527 goto end; 1528 } 1529 1530 /* validate authentication value */ 1531 #ifdef HAVE_GSSAPI 1532 if (gsstoken == NULL) { 1533 #endif 1534 type = oakley_validate_auth(iph1); 1535 if (type != 0) { 1536 if (type == -1) { 1537 /* msg printed inner oakley_validate_auth() */ 1538 goto end; 1539 } 1540 EVT_PUSH(iph1->local, iph1->remote, 1541 EVTT_PEERPH1AUTH_FAILED, NULL); 1542 isakmp_info_send_n1(iph1, type, NULL); 1543 goto end; 1544 } 1545 #ifdef HAVE_GSSAPI 1546 } 1547 #endif 1548 1549 if (oakley_checkcr(iph1) < 0) { 1550 /* Ignore this error in order to be interoperability. */ 1551 ; 1552 } 1553 1554 /* 1555 * XXX: Should we do compare two addresses, ph1handle's and ID 1556 * payload's. 1557 */ 1558 1559 plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID\n"); 1560 plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l); 1561 1562 /* see handler.h about IV synchronization. */ 1563 memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l); 1564 1565 #ifdef HAVE_GSSAPI 1566 iph1->status = gsstoken != NULL ? PHASE1ST_MSG2RECEIVED : 1567 PHASE1ST_MSG3RECEIVED; 1568 #else 1569 iph1->status = PHASE1ST_MSG3RECEIVED; 1570 #endif 1571 1572 error = 0; 1573 1574 end: 1575 if (pbuf) 1576 vfree(pbuf); 1577 if (msg) 1578 vfree(msg); 1579 #ifdef HAVE_GSSAPI 1580 if (gsstoken) 1581 vfree(gsstoken); 1582 #endif 1583 1584 if (error) { 1585 VPTRINIT(iph1->id_p); 1586 oakley_delcert(iph1->cert_p); 1587 iph1->cert_p = NULL; 1588 oakley_delcert(iph1->crl_p); 1589 iph1->crl_p = NULL; 1590 VPTRINIT(iph1->sig_p); 1591 oakley_delcert(iph1->cr_p); 1592 iph1->cr_p = NULL; 1593 } 1594 1595 return error; 1596 } 1597 1598 /* 1599 * send to initiator 1600 * psk: HDR*, IDr1, HASH_R 1601 * sig: HDR*, IDr1, [ CERT, ] SIG_R 1602 * gssapi: HDR*, IDr1, < GSSr(n) | HASH_R > 1603 * rsa: HDR*, HASH_R 1604 * rev: HDR*, HASH_R 1605 */ 1606 int 1607 ident_r3send(iph1, msg) 1608 struct ph1handle *iph1; 1609 vchar_t *msg; 1610 { 1611 int error = -1; 1612 int dohash = 1; 1613 #ifdef HAVE_GSSAPI 1614 int len; 1615 #endif 1616 1617 /* validity check */ 1618 if (iph1->status != PHASE1ST_MSG3RECEIVED) { 1619 plog(LLV_ERROR, LOCATION, NULL, 1620 "status mismatched %d.\n", iph1->status); 1621 goto end; 1622 } 1623 1624 /* make ID payload into isakmp status */ 1625 if (ipsecdoi_setid1(iph1) < 0) 1626 goto end; 1627 1628 #ifdef HAVE_GSSAPI 1629 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB && 1630 gssapi_more_tokens(iph1)) { 1631 gssapi_get_rtoken(iph1, &len); 1632 if (len != 0) 1633 dohash = 0; 1634 } 1635 #endif 1636 1637 if (dohash) { 1638 /* generate HASH to send */ 1639 plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_R\n"); 1640 iph1->hash = oakley_ph1hash_common(iph1, GENERATE); 1641 if (iph1->hash == NULL) 1642 goto end; 1643 } else 1644 iph1->hash = NULL; 1645 1646 /* set encryption flag */ 1647 iph1->flags |= ISAKMP_FLAG_E; 1648 1649 /* create HDR;ID;HASH payload */ 1650 iph1->sendbuf = ident_ir3mx(iph1); 1651 if (iph1->sendbuf == NULL) 1652 goto end; 1653 1654 /* send HDR;ID;HASH to responder */ 1655 if (isakmp_send(iph1, iph1->sendbuf) < 0) 1656 goto end; 1657 1658 /* the sending message is added to the received-list. */ 1659 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { 1660 plog(LLV_ERROR , LOCATION, NULL, 1661 "failed to add a response packet to the tree.\n"); 1662 goto end; 1663 } 1664 1665 /* see handler.h about IV synchronization. */ 1666 memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l); 1667 1668 iph1->status = PHASE1ST_ESTABLISHED; 1669 1670 error = 0; 1671 1672 end: 1673 1674 return error; 1675 } 1676 1677 /* 1678 * This is used in main mode for: 1679 * initiator's 3rd exchange send to responder 1680 * psk: HDR, KE, Ni 1681 * sig: HDR, KE, Ni 1682 * rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r 1683 * rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i, 1684 * <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i] 1685 * responders 2nd exchnage send to initiator 1686 * psk: HDR, KE, Nr 1687 * sig: HDR, KE, Nr [, CR ] 1688 * rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i 1689 * rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r, 1690 */ 1691 static vchar_t * 1692 ident_ir2mx(iph1) 1693 struct ph1handle *iph1; 1694 { 1695 vchar_t *buf = 0; 1696 struct payload_list *plist = NULL; 1697 int need_cr = 0; 1698 vchar_t *cr = NULL; 1699 vchar_t *vid = NULL; 1700 int error = -1; 1701 #ifdef HAVE_GSSAPI 1702 vchar_t *gsstoken = NULL; 1703 #endif 1704 #ifdef ENABLE_NATT 1705 vchar_t *natd[2] = { NULL, NULL }; 1706 #endif 1707 1708 /* create CR if need */ 1709 if (iph1->side == RESPONDER 1710 && iph1->rmconf->send_cr 1711 && oakley_needcr(iph1->approval->authmethod) 1712 && iph1->rmconf->peerscertfile == NULL) { 1713 need_cr = 1; 1714 cr = oakley_getcr(iph1); 1715 if (cr == NULL) { 1716 plog(LLV_ERROR, LOCATION, NULL, 1717 "failed to get cr buffer.\n"); 1718 goto end; 1719 } 1720 } 1721 1722 #ifdef HAVE_GSSAPI 1723 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) 1724 gssapi_get_token_to_send(iph1, &gsstoken); 1725 #endif 1726 1727 /* create isakmp KE payload */ 1728 plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE); 1729 1730 /* create isakmp NONCE payload */ 1731 plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE); 1732 1733 #ifdef HAVE_GSSAPI 1734 if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) 1735 plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS); 1736 #endif 1737 1738 /* append vendor id, if needed */ 1739 if (vid) 1740 plist = isakmp_plist_append(plist, vid, ISAKMP_NPTYPE_VID); 1741 1742 /* create isakmp CR payload if needed */ 1743 if (need_cr) 1744 plist = isakmp_plist_append(plist, cr, ISAKMP_NPTYPE_CR); 1745 1746 #ifdef ENABLE_NATT 1747 /* generate and append NAT-D payloads */ 1748 if (NATT_AVAILABLE(iph1) && iph1->status == PHASE1ST_MSG2RECEIVED) 1749 { 1750 if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) { 1751 plog(LLV_ERROR, LOCATION, NULL, 1752 "NAT-D hashing failed for %s\n", saddr2str(iph1->remote)); 1753 goto end; 1754 } 1755 1756 if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) { 1757 plog(LLV_ERROR, LOCATION, NULL, 1758 "NAT-D hashing failed for %s\n", saddr2str(iph1->local)); 1759 goto end; 1760 } 1761 1762 plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n"); 1763 plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d); 1764 plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d); 1765 } 1766 #endif 1767 1768 buf = isakmp_plist_set_all (&plist, iph1); 1769 1770 error = 0; 1771 1772 end: 1773 if (error && buf != NULL) { 1774 vfree(buf); 1775 buf = NULL; 1776 } 1777 if (cr) 1778 vfree(cr); 1779 #ifdef HAVE_GSSAPI 1780 if (gsstoken) 1781 vfree(gsstoken); 1782 #endif 1783 if (vid) 1784 vfree(vid); 1785 1786 #ifdef ENABLE_NATT 1787 if (natd[0]) 1788 vfree(natd[0]); 1789 if (natd[1]) 1790 vfree(natd[1]); 1791 #endif 1792 1793 return buf; 1794 } 1795 1796 /* 1797 * This is used in main mode for: 1798 * initiator's 4th exchange send to responder 1799 * psk: HDR*, IDi1, HASH_I 1800 * sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I 1801 * gssapi: HDR*, [ IDi1, ] < GSSi(n) | HASH_I > 1802 * rsa: HDR*, HASH_I 1803 * rev: HDR*, HASH_I 1804 * responders 3rd exchnage send to initiator 1805 * psk: HDR*, IDr1, HASH_R 1806 * sig: HDR*, IDr1, [ CERT, ] SIG_R 1807 * gssapi: HDR*, [ IDr1, ] < GSSr(n) | HASH_R > 1808 * rsa: HDR*, HASH_R 1809 * rev: HDR*, HASH_R 1810 */ 1811 static vchar_t * 1812 ident_ir3mx(iph1) 1813 struct ph1handle *iph1; 1814 { 1815 struct payload_list *plist = NULL; 1816 vchar_t *buf = NULL, *new = NULL; 1817 int need_cr = 0; 1818 int need_cert = 0; 1819 vchar_t *cr = NULL; 1820 int error = -1; 1821 #ifdef HAVE_GSSAPI 1822 int nptype; 1823 vchar_t *gsstoken = NULL; 1824 vchar_t *gsshash = NULL; 1825 #endif 1826 1827 switch (AUTHMETHOD(iph1)) { 1828 case OAKLEY_ATTR_AUTH_METHOD_PSKEY: 1829 #ifdef ENABLE_HYBRID 1830 case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I: 1831 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: 1832 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: 1833 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: 1834 #endif 1835 /* create isakmp ID payload */ 1836 plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID); 1837 1838 /* create isakmp HASH payload */ 1839 plist = isakmp_plist_append(plist, iph1->hash, ISAKMP_NPTYPE_HASH); 1840 break; 1841 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: 1842 case OAKLEY_ATTR_AUTH_METHOD_RSASIG: 1843 #ifdef ENABLE_HYBRID 1844 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: 1845 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: 1846 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: 1847 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: 1848 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: 1849 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: 1850 #endif 1851 if (oakley_getmycert(iph1) < 0) 1852 goto end; 1853 1854 if (oakley_getsign(iph1) < 0) 1855 goto end; 1856 1857 /* create CR if need */ 1858 if (iph1->side == INITIATOR 1859 && iph1->rmconf->send_cr 1860 && oakley_needcr(iph1->approval->authmethod) 1861 && iph1->rmconf->peerscertfile == NULL) { 1862 need_cr = 1; 1863 cr = oakley_getcr(iph1); 1864 if (cr == NULL) { 1865 plog(LLV_ERROR, LOCATION, NULL, 1866 "failed to get cr buffer.\n"); 1867 goto end; 1868 } 1869 } 1870 1871 if (iph1->cert != NULL && iph1->rmconf->send_cert) 1872 need_cert = 1; 1873 1874 /* add ID payload */ 1875 plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID); 1876 1877 /* add CERT payload if there */ 1878 if (need_cert) 1879 plist = isakmp_plist_append(plist, iph1->cert->pl, ISAKMP_NPTYPE_CERT); 1880 /* add SIG payload */ 1881 plist = isakmp_plist_append(plist, iph1->sig, ISAKMP_NPTYPE_SIG); 1882 1883 /* create isakmp CR payload */ 1884 if (need_cr) 1885 plist = isakmp_plist_append(plist, cr, ISAKMP_NPTYPE_CR); 1886 break; 1887 #ifdef HAVE_GSSAPI 1888 case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: 1889 if (iph1->hash != NULL) { 1890 gsshash = gssapi_wraphash(iph1); 1891 if (gsshash == NULL) 1892 goto end; 1893 } else { 1894 gssapi_get_token_to_send(iph1, &gsstoken); 1895 } 1896 1897 if (!gssapi_id_sent(iph1)) { 1898 /* create isakmp ID payload */ 1899 plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID); 1900 gssapi_set_id_sent(iph1); 1901 } 1902 1903 if (iph1->hash != NULL) 1904 /* create isakmp HASH payload */ 1905 plist = isakmp_plist_append(plist, gsshash, ISAKMP_NPTYPE_HASH); 1906 else 1907 plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS); 1908 break; 1909 #endif 1910 case OAKLEY_ATTR_AUTH_METHOD_RSAENC: 1911 case OAKLEY_ATTR_AUTH_METHOD_RSAREV: 1912 #ifdef ENABLE_HYBRID 1913 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: 1914 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: 1915 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: 1916 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: 1917 #endif 1918 plog(LLV_ERROR, LOCATION, NULL, 1919 "not supported authentication type %d\n", 1920 iph1->approval->authmethod); 1921 goto end; 1922 default: 1923 plog(LLV_ERROR, LOCATION, NULL, 1924 "invalid authentication type %d\n", 1925 iph1->approval->authmethod); 1926 goto end; 1927 } 1928 1929 buf = isakmp_plist_set_all (&plist, iph1); 1930 1931 #ifdef HAVE_PRINT_ISAKMP_C 1932 isakmp_printpacket(buf, iph1->local, iph1->remote, 1); 1933 #endif 1934 1935 /* encoding */ 1936 new = oakley_do_encrypt(iph1, buf, iph1->ivm->ive, iph1->ivm->iv); 1937 if (new == NULL) 1938 goto end; 1939 1940 vfree(buf); 1941 1942 buf = new; 1943 1944 error = 0; 1945 1946 end: 1947 #ifdef HAVE_GSSAPI 1948 if (gsstoken) 1949 vfree(gsstoken); 1950 #endif 1951 if (cr) 1952 vfree(cr); 1953 if (error && buf != NULL) { 1954 vfree(buf); 1955 buf = NULL; 1956 } 1957 1958 return buf; 1959 } 1960
