1: /* $NetBSD: isakmp_agg.c,v 1.16 2009/09/18 10:31:11 tteras Exp $ */
2:
3: /* Id: isakmp_agg.c,v 1.28 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: /* Aggressive Exchange (Aggressive 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: #ifdef ENABLE_HYBRID
65: #include <resolv.h>
66: #endif
67:
68: #include "localconf.h"
69: #include "remoteconf.h"
70: #include "isakmp_var.h"
71: #include "isakmp.h"
72: #include "evt.h"
73: #include "oakley.h"
74: #include "handler.h"
75: #include "ipsec_doi.h"
76: #include "crypto_openssl.h"
77: #include "pfkey.h"
78: #include "isakmp_agg.h"
79: #include "isakmp_inf.h"
80: #ifdef ENABLE_HYBRID
81: #include "isakmp_xauth.h"
82: #include "isakmp_cfg.h"
83: #endif
84: #ifdef ENABLE_FRAG
85: #include "isakmp_frag.h"
86: #endif
87: #include "vendorid.h"
88: #include "strnames.h"
89:
90: #ifdef ENABLE_NATT
91: #include "nattraversal.h"
92: #endif
93:
94: #ifdef HAVE_GSSAPI
95: #include "gssapi.h"
96: #endif
97:
98: /*
99: * begin Aggressive Mode as initiator.
100: */
101: /*
102: * send to responder
103: * psk: HDR, SA, KE, Ni, IDi1
104: * sig: HDR, SA, KE, Ni, IDi1 [, CR ]
105: * gssapi: HDR, SA, KE, Ni, IDi1, GSSi
106: * rsa: HDR, SA, [ HASH(1),] KE, <IDi1_b>Pubkey_r, <Ni_b>Pubkey_r
107: * rev: HDR, SA, [ HASH(1),] <Ni_b>Pubkey_r, <KE_b>Ke_i,
108: * <IDii_b>Ke_i [, <Cert-I_b>Ke_i ]
109: */
110: int
111: agg_i1send(iph1, msg)
112: struct ph1handle *iph1;
113: vchar_t *msg; /* must be null */
114: {
115: struct payload_list *plist = NULL;
116: int error = -1;
117: #ifdef ENABLE_NATT
118: vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL };
119: int i;
120: #endif
121: #ifdef ENABLE_HYBRID
122: vchar_t *vid_xauth = NULL;
123: vchar_t *vid_unity = NULL;
124: #endif
125: #ifdef ENABLE_FRAG
126: vchar_t *vid_frag = NULL;
127: #endif
128: #ifdef HAVE_GSSAPI
129: vchar_t *gsstoken = NULL;
130: int len;
131: #endif
132: #ifdef ENABLE_DPD
133: vchar_t *vid_dpd = NULL;
134: #endif
135:
136: /* validity check */
137: if (msg != NULL) {
138: plog(LLV_ERROR, LOCATION, NULL,
139: "msg has to be NULL in this function.\n");
140: goto end;
141: }
142: if (iph1->status != PHASE1ST_START) {
143: plog(LLV_ERROR, LOCATION, NULL,
144: "status mismatched %d.\n", iph1->status);
145: goto end;
146: }
147:
148: /* create isakmp index */
149: memset(&iph1->index, 0, sizeof(iph1->index));
150: isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
151:
152: /* make ID payload into isakmp status */
153: if (ipsecdoi_setid1(iph1) < 0)
154: goto end;
155:
156: /* create SA payload for my proposal */
157: iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf, iph1->rmconf->proposal);
158: if (iph1->sa == NULL)
159: goto end;
160:
161: /* consistency check of proposals */
162: if (iph1->rmconf->dhgrp == NULL) {
163: plog(LLV_ERROR, LOCATION, NULL,
164: "configuration failure about DH group.\n");
165: goto end;
166: }
167:
168: /* generate DH public value */
169: if (oakley_dh_generate(iph1->rmconf->dhgrp,
170: &iph1->dhpub, &iph1->dhpriv) < 0)
171: goto end;
172:
173: /* generate NONCE value */
174: iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
175: if (iph1->nonce == NULL)
176: goto end;
177:
178: #ifdef ENABLE_HYBRID
179: /* Do we need Xauth VID? */
180: switch (iph1->rmconf->proposal->authmethod) {
181: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
182: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
183: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
184: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
185: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
186: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
187: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
188: if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL)
189: plog(LLV_ERROR, LOCATION, NULL,
190: "Xauth vendor ID generation failed\n");
191: if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL)
192: plog(LLV_ERROR, LOCATION, NULL,
193: "Unity vendor ID generation failed\n");
194: break;
195: default:
196: break;
197: }
198: #endif
199:
200: #ifdef ENABLE_FRAG
201: if (iph1->rmconf->ike_frag) {
202: vid_frag = set_vendorid(VENDORID_FRAG);
203: if (vid_frag != NULL)
204: vid_frag = isakmp_frag_addcap(vid_frag,
205: VENDORID_FRAG_AGG);
206: if (vid_frag == NULL)
207: plog(LLV_ERROR, LOCATION, NULL,
208: "Frag vendorID construction failed\n");
209: }
210: #endif
211:
212: plog(LLV_DEBUG, LOCATION, NULL, "authmethod is %s\n",
213: s_oakley_attr_method(iph1->rmconf->proposal->authmethod));
214: #ifdef HAVE_GSSAPI
215: if (iph1->rmconf->proposal->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
216: gssapi_get_itoken(iph1, &len);
217: #endif
218:
219: /* set SA payload to propose */
220: plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA);
221:
222: /* create isakmp KE payload */
223: plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE);
224:
225: /* create isakmp NONCE payload */
226: plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
227:
228: /* create isakmp ID payload */
229: plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
230:
231: #ifdef HAVE_GSSAPI
232: if (iph1->rmconf->proposal->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) {
233: if (gssapi_get_token_to_send(iph1, &gsstoken) < 0) {
234: plog(LLV_ERROR, LOCATION, NULL,
235: "Failed to get gssapi token.\n");
236: goto end;
237: }
238: plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS);
239: }
240: #endif
241: /* create isakmp CR payload */
242: if (oakley_needcr(iph1->rmconf->proposal->authmethod))
243: plist = oakley_append_cr(plist, iph1);
244:
245: #ifdef ENABLE_FRAG
246: if (vid_frag)
247: plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
248: #endif
249: #ifdef ENABLE_NATT
250: /*
251: * set VID payload for NAT-T if NAT-T
252: * support allowed in the config file
253: */
254: if (iph1->rmconf->nat_traversal)
255: plist = isakmp_plist_append_natt_vids(plist, vid_natt);
256: #endif
257: #ifdef ENABLE_HYBRID
258: if (vid_xauth)
259: plist = isakmp_plist_append(plist,
260: vid_xauth, ISAKMP_NPTYPE_VID);
261: if (vid_unity)
262: plist = isakmp_plist_append(plist,
263: vid_unity, ISAKMP_NPTYPE_VID);
264: #endif
265: #ifdef ENABLE_DPD
266: if(iph1->rmconf->dpd){
267: vid_dpd = set_vendorid(VENDORID_DPD);
268: if (vid_dpd != NULL)
269: plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
270: }
271: #endif
272:
273: iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
274:
275: #ifdef HAVE_PRINT_ISAKMP_C
276: isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
277: #endif
278:
279: /* send the packet, add to the schedule to resend */
280: if (isakmp_ph1send(iph1) == -1)
281: goto end;
282:
283: iph1->status = PHASE1ST_MSG1SENT;
284:
285: error = 0;
286:
287: end:
288: #ifdef HAVE_GSSAPI
289: if (gsstoken)
290: vfree(gsstoken);
291: #endif
292: #ifdef ENABLE_FRAG
293: if (vid_frag)
294: vfree(vid_frag);
295: #endif
296: #ifdef ENABLE_NATT
297: for (i = 0; i < MAX_NATT_VID_COUNT && vid_natt[i] != NULL; i++)
298: vfree(vid_natt[i]);
299: #endif
300: #ifdef ENABLE_HYBRID
301: if (vid_xauth != NULL)
302: vfree(vid_xauth);
303: if (vid_unity != NULL)
304: vfree(vid_unity);
305: #endif
306: #ifdef ENABLE_DPD
307: if (vid_dpd != NULL)
308: vfree(vid_dpd);
309: #endif
310:
311: return error;
312: }
313:
314: /*
315: * receive from responder
316: * psk: HDR, SA, KE, Nr, IDr1, HASH_R
317: * sig: HDR, SA, KE, Nr, IDr1, [ CR, ] [ CERT, ] SIG_R
318: * gssapi: HDR, SA, KE, Nr, IDr1, GSSr, HASH_R
319: * rsa: HDR, SA, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i, HASH_R
320: * rev: HDR, SA, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDir_b>Ke_r, HASH_R
321: */
322: int
323: agg_i2recv(iph1, msg)
324: struct ph1handle *iph1;
325: vchar_t *msg;
326: {
327: vchar_t *pbuf = NULL;
328: struct isakmp_parse_t *pa;
329: vchar_t *satmp = NULL;
330: int error = -1;
331: int ptype;
332: #ifdef ENABLE_HYBRID
333: vchar_t *unity_vid;
334: vchar_t *xauth_vid;
335: #endif
336: #ifdef HAVE_GSSAPI
337: vchar_t *gsstoken = NULL;
338: #endif
339:
340: #ifdef ENABLE_NATT
341: int natd_seq = 0;
342: struct natd_payload {
343: int seq;
344: vchar_t *payload;
345: TAILQ_ENTRY(natd_payload) chain;
346: };
347: TAILQ_HEAD(_natd_payload, natd_payload) natd_tree;
348: TAILQ_INIT(&natd_tree);
349: #endif
350:
351: /* validity check */
352: if (iph1->status != PHASE1ST_MSG1SENT) {
353: plog(LLV_ERROR, LOCATION, NULL,
354: "status mismatched %d.\n", iph1->status);
355: goto end;
356: }
357:
358: /* validate the type of next payload */
359: pbuf = isakmp_parse(msg);
360: if (pbuf == NULL)
361: goto end;
362: pa = (struct isakmp_parse_t *)pbuf->v;
363:
364: iph1->pl_hash = NULL;
365:
366: /* SA payload is fixed postion */
367: if (pa->type != ISAKMP_NPTYPE_SA) {
368: plog(LLV_ERROR, LOCATION, iph1->remote,
369: "received invalid next payload type %d, "
370: "expecting %d.\n",
371: pa->type, ISAKMP_NPTYPE_SA);
372: goto end;
373: }
374:
375: if (isakmp_p2ph(&satmp, pa->ptr) < 0)
376: goto end;
377: pa++;
378:
379: for (/*nothing*/;
380: pa->type != ISAKMP_NPTYPE_NONE;
381: pa++) {
382:
383: switch (pa->type) {
384: case ISAKMP_NPTYPE_KE:
385: if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
386: goto end;
387: break;
388: case ISAKMP_NPTYPE_NONCE:
389: if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
390: goto end;
391: break;
392: case ISAKMP_NPTYPE_ID:
393: if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
394: goto end;
395: break;
396: case ISAKMP_NPTYPE_HASH:
397: iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
398: break;
399: case ISAKMP_NPTYPE_CR:
400: if (oakley_savecr(iph1, pa->ptr) < 0)
401: goto end;
402: break;
403: case ISAKMP_NPTYPE_CERT:
404: if (oakley_savecert(iph1, pa->ptr) < 0)
405: goto end;
406: break;
407: case ISAKMP_NPTYPE_SIG:
408: if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
409: goto end;
410: break;
411: case ISAKMP_NPTYPE_VID:
412: handle_vendorid(iph1, pa->ptr);
413: break;
414: case ISAKMP_NPTYPE_N:
415: isakmp_log_notify(iph1,
416: (struct isakmp_pl_n *) pa->ptr,
417: "aggressive exchange");
418: break;
419: #ifdef HAVE_GSSAPI
420: case ISAKMP_NPTYPE_GSS:
421: if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
422: goto end;
423: gssapi_save_received_token(iph1, gsstoken);
424: break;
425: #endif
426:
427: #ifdef ENABLE_NATT
428: case ISAKMP_NPTYPE_NATD_DRAFT:
429: case ISAKMP_NPTYPE_NATD_RFC:
430: if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
431: pa->type == iph1->natt_options->payload_nat_d) {
432: struct natd_payload *natd;
433: natd = (struct natd_payload *)racoon_malloc(sizeof(*natd));
434: if (!natd)
435: goto end;
436:
437: natd->payload = NULL;
438:
439: if (isakmp_p2ph (&natd->payload, pa->ptr) < 0)
440: goto end;
441:
442: natd->seq = natd_seq++;
443:
444: TAILQ_INSERT_TAIL(&natd_tree, natd, chain);
445: break;
446: }
447: /* passthrough to default... */
448: #endif
449:
450: default:
451: /* don't send information, see isakmp_ident_r1() */
452: plog(LLV_ERROR, LOCATION, iph1->remote,
453: "ignore the packet, "
454: "received unexpecting payload type %d.\n",
455: pa->type);
456: goto end;
457: }
458: }
459:
460: /* payload existency check */
461: if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
462: plog(LLV_ERROR, LOCATION, iph1->remote,
463: "few isakmp message received.\n");
464: goto end;
465: }
466:
467: /* verify identifier */
468: if (ipsecdoi_checkid1(iph1) != 0) {
469: plog(LLV_ERROR, LOCATION, iph1->remote,
470: "invalid ID payload.\n");
471: goto end;
472: }
473:
474: /* check SA payload and set approval SA for use */
475: if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
476: plog(LLV_ERROR, LOCATION, iph1->remote,
477: "failed to get valid proposal.\n");
478: /* XXX send information */
479: goto end;
480: }
481: VPTRINIT(iph1->sa_ret);
482:
483: /* fix isakmp index */
484: memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
485: sizeof(cookie_t));
486:
487: #ifdef ENABLE_NATT
488: if (NATT_AVAILABLE(iph1)) {
489: struct natd_payload *natd = NULL;
490: int natd_verified;
491:
492: plog(LLV_INFO, LOCATION, iph1->remote,
493: "Selected NAT-T version: %s\n",
494: vid_string_by_id(iph1->natt_options->version));
495:
496: /* set both bits first so that we can clear them
497: upon verifying hashes */
498: iph1->natt_flags |= NAT_DETECTED;
499:
500: while ((natd = TAILQ_FIRST(&natd_tree)) != NULL) {
501: /* this function will clear appropriate bits bits
502: from iph1->natt_flags */
503: natd_verified = natt_compare_addr_hash (iph1,
504: natd->payload, natd->seq);
505:
506: plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
507: natd->seq - 1,
508: natd_verified ? "verified" : "doesn't match");
509:
510: vfree (natd->payload);
511:
512: TAILQ_REMOVE(&natd_tree, natd, chain);
513: racoon_free (natd);
514: }
515:
516: plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
517: iph1->natt_flags & NAT_DETECTED ?
518: "detected:" : "not detected",
519: iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
520: iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
521:
522: if (iph1->natt_flags & NAT_DETECTED)
523: natt_float_ports (iph1);
524: }
525: #endif
526:
527: /* compute sharing secret of DH */
528: if (oakley_dh_compute(iph1->rmconf->dhgrp, iph1->dhpub,
529: iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
530: goto end;
531:
532: /* generate SKEYIDs & IV & final cipher key */
533: if (oakley_skeyid(iph1) < 0)
534: goto end;
535: if (oakley_skeyid_dae(iph1) < 0)
536: goto end;
537: if (oakley_compute_enckey(iph1) < 0)
538: goto end;
539: if (oakley_newiv(iph1) < 0)
540: goto end;
541:
542: /* validate authentication value */
543: ptype = oakley_validate_auth(iph1);
544: if (ptype != 0) {
545: if (ptype == -1) {
546: /* message printed inner oakley_validate_auth() */
547: goto end;
548: }
549: evt_phase1(iph1, EVT_PHASE1_AUTH_FAILED, NULL);
550: isakmp_info_send_n1(iph1, ptype, NULL);
551: goto end;
552: }
553:
554: if (oakley_checkcr(iph1) < 0) {
555: /* Ignore this error in order to be interoperability. */
556: ;
557: }
558:
559: /* change status of isakmp status entry */
560: iph1->status = PHASE1ST_MSG2RECEIVED;
561:
562: error = 0;
563:
564: end:
565: #ifdef HAVE_GSSAPI
566: if (gsstoken)
567: vfree(gsstoken);
568: #endif
569: if (pbuf)
570: vfree(pbuf);
571: if (satmp)
572: vfree(satmp);
573: if (error) {
574: VPTRINIT(iph1->dhpub_p);
575: VPTRINIT(iph1->nonce_p);
576: VPTRINIT(iph1->id_p);
577: VPTRINIT(iph1->cert_p);
578: VPTRINIT(iph1->crl_p);
579: VPTRINIT(iph1->sig_p);
580: VPTRINIT(iph1->cr_p);
581: }
582:
583: return error;
584: }
585:
586: /*
587: * send to responder
588: * psk: HDR, HASH_I
589: * gssapi: HDR, HASH_I
590: * sig: HDR, [ CERT, ] SIG_I
591: * rsa: HDR, HASH_I
592: * rev: HDR, HASH_I
593: */
594: int
595: agg_i2send(iph1, msg)
596: struct ph1handle *iph1;
597: vchar_t *msg;
598: {
599: struct payload_list *plist = NULL;
600: int need_cert = 0;
601: int error = -1;
602: vchar_t *gsshash = NULL;
603:
604: /* validity check */
605: if (iph1->status != PHASE1ST_MSG2RECEIVED) {
606: plog(LLV_ERROR, LOCATION, NULL,
607: "status mismatched %d.\n", iph1->status);
608: goto end;
609: }
610:
611: /* generate HASH to send */
612: plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
613: iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
614: if (iph1->hash == NULL) {
615: #ifdef HAVE_GSSAPI
616: if (gssapi_more_tokens(iph1) &&
617: #ifdef ENABLE_HYBRID
618: !iph1->rmconf->xauth &&
619: #endif
620: 1)
621: isakmp_info_send_n1(iph1,
622: ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
623: #endif
624: goto end;
625: }
626:
627: switch (iph1->approval->authmethod) {
628: case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
629: #ifdef ENABLE_HYBRID
630: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
631: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
632: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
633: #endif
634: /* set HASH payload */
635: plist = isakmp_plist_append(plist,
636: iph1->hash, ISAKMP_NPTYPE_HASH);
637: break;
638:
639: case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
640: case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
641: #ifdef ENABLE_HYBRID
642: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
643: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
644: #endif
645: /* XXX if there is CR or not ? */
646:
647: if (oakley_getmycert(iph1) < 0)
648: goto end;
649:
650: if (oakley_getsign(iph1) < 0)
651: goto end;
652:
653: if (iph1->cert != NULL && iph1->rmconf->send_cert)
654: need_cert = 1;
655:
656: /* add CERT payload if there */
657: if (need_cert)
658: plist = isakmp_plist_append(plist, iph1->cert,
659: ISAKMP_NPTYPE_CERT);
660:
661: /* add SIG payload */
662: plist = isakmp_plist_append(plist,
663: iph1->sig, ISAKMP_NPTYPE_SIG);
664: break;
665:
666: case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
667: case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
668: #ifdef ENABLE_HYBRID
669: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
670: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
671: #endif
672: break;
673: #ifdef HAVE_GSSAPI
674: case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
675: gsshash = gssapi_wraphash(iph1);
676: if (gsshash == NULL) {
677: plog(LLV_ERROR, LOCATION, NULL,
678: "failed to wrap hash\n");
679: isakmp_info_send_n1(iph1,
680: ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
681: goto end;
682: }
683:
684: plist = isakmp_plist_append(plist,
685: gsshash, ISAKMP_NPTYPE_HASH);
686: break;
687: #endif
688: }
689:
690: #ifdef ENABLE_NATT
691: /* generate NAT-D payloads */
692: if (NATT_AVAILABLE(iph1)) {
693: vchar_t *natd[2] = { NULL, NULL };
694:
695: plog(LLV_INFO, LOCATION,
696: NULL, "Adding remote and local NAT-D payloads.\n");
697:
698: if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
699: plog(LLV_ERROR, LOCATION, NULL,
700: "NAT-D hashing failed for %s\n",
701: saddr2str(iph1->remote));
702: goto end;
703: }
704:
705: if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
706: plog(LLV_ERROR, LOCATION, NULL,
707: "NAT-D hashing failed for %s\n",
708: saddr2str(iph1->local));
709: goto end;
710: }
711:
712: plist = isakmp_plist_append(plist,
713: natd[0], iph1->natt_options->payload_nat_d);
714: plist = isakmp_plist_append(plist,
715: natd[1], iph1->natt_options->payload_nat_d);
716: }
717: #endif
718:
719: iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
720:
721: #ifdef HAVE_PRINT_ISAKMP_C
722: isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
723: #endif
724:
725: /* send to responder */
726: if (isakmp_send(iph1, iph1->sendbuf) < 0)
727: goto end;
728:
729: /* the sending message is added to the received-list. */
730: if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
731: plog(LLV_ERROR , LOCATION, NULL,
732: "failed to add a response packet to the tree.\n");
733: goto end;
734: }
735:
736: /* set encryption flag */
737: iph1->flags |= ISAKMP_FLAG_E;
738:
739: iph1->status = PHASE1ST_ESTABLISHED;
740:
741: error = 0;
742:
743: end:
744: if (gsshash)
745: vfree(gsshash);
746: return error;
747: }
748:
749: /*
750: * receive from initiator
751: * psk: HDR, SA, KE, Ni, IDi1
752: * sig: HDR, SA, KE, Ni, IDi1 [, CR ]
753: * gssapi: HDR, SA, KE, Ni, IDi1 , GSSi
754: * rsa: HDR, SA, [ HASH(1),] KE, <IDi1_b>Pubkey_r, <Ni_b>Pubkey_r
755: * rev: HDR, SA, [ HASH(1),] <Ni_b>Pubkey_r, <KE_b>Ke_i,
756: * <IDii_b>Ke_i [, <Cert-I_b>Ke_i ]
757: */
758: int
759: agg_r1recv(iph1, msg)
760: struct ph1handle *iph1;
761: vchar_t *msg;
762: {
763: int error = -1;
764: vchar_t *pbuf = NULL;
765: struct isakmp_parse_t *pa;
766: int vid_numeric;
767: #ifdef HAVE_GSSAPI
768: vchar_t *gsstoken = NULL;
769: #endif
770:
771: /* validity check */
772: if (iph1->status != PHASE1ST_START) {
773: plog(LLV_ERROR, LOCATION, NULL,
774: "status mismatched %d.\n", iph1->status);
775: goto end;
776: }
777:
778: /* validate the type of next payload */
779: pbuf = isakmp_parse(msg);
780: if (pbuf == NULL)
781: goto end;
782: pa = (struct isakmp_parse_t *)pbuf->v;
783:
784: /* SA payload is fixed postion */
785: if (pa->type != ISAKMP_NPTYPE_SA) {
786: plog(LLV_ERROR, LOCATION, iph1->remote,
787: "received invalid next payload type %d, "
788: "expecting %d.\n",
789: pa->type, ISAKMP_NPTYPE_SA);
790: goto end;
791: }
792: if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
793: goto end;
794: pa++;
795:
796: for (/*nothing*/;
797: pa->type != ISAKMP_NPTYPE_NONE;
798: pa++) {
799:
800: plog(LLV_DEBUG, LOCATION, NULL,
801: "received payload of type %s\n",
802: s_isakmp_nptype(pa->type));
803:
804: switch (pa->type) {
805: case ISAKMP_NPTYPE_KE:
806: if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
807: goto end;
808: break;
809: case ISAKMP_NPTYPE_NONCE:
810: if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
811: goto end;
812: break;
813: case ISAKMP_NPTYPE_ID:
814: if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
815: goto end;
816: break;
817: case ISAKMP_NPTYPE_VID:
818: vid_numeric = handle_vendorid(iph1, pa->ptr);
819: #ifdef ENABLE_FRAG
820: if ((vid_numeric == VENDORID_FRAG) &&
821: (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_AGG))
822: iph1->frag = 1;
823: #endif
824: break;
825:
826: case ISAKMP_NPTYPE_CR:
827: if (oakley_savecr(iph1, pa->ptr) < 0)
828: goto end;
829: break;
830:
831: #ifdef HAVE_GSSAPI
832: case ISAKMP_NPTYPE_GSS:
833: if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
834: goto end;
835: gssapi_save_received_token(iph1, gsstoken);
836: break;
837: #endif
838: default:
839: /* don't send information, see isakmp_ident_r1() */
840: plog(LLV_ERROR, LOCATION, iph1->remote,
841: "ignore the packet, "
842: "received unexpecting payload type %d.\n",
843: pa->type);
844: goto end;
845: }
846: }
847:
848: /* payload existency check */
849: if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
850: plog(LLV_ERROR, LOCATION, iph1->remote,
851: "few isakmp message received.\n");
852: goto end;
853: }
854:
855: /* verify identifier */
856: if (ipsecdoi_checkid1(iph1) != 0) {
857: plog(LLV_ERROR, LOCATION, iph1->remote,
858: "invalid ID payload.\n");
859: goto end;
860: }
861:
862: #ifdef ENABLE_NATT
863: if (NATT_AVAILABLE(iph1))
864: plog(LLV_INFO, LOCATION, iph1->remote,
865: "Selected NAT-T version: %s\n",
866: vid_string_by_id(iph1->natt_options->version));
867: #endif
868:
869: /* check SA payload and set approval SA for use */
870: if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
871: plog(LLV_ERROR, LOCATION, iph1->remote,
872: "failed to get valid proposal.\n");
873: /* XXX send information */
874: goto end;
875: }
876:
877: if (oakley_checkcr(iph1) < 0) {
878: /* Ignore this error in order to be interoperability. */
879: ;
880: }
881:
882: iph1->status = PHASE1ST_MSG1RECEIVED;
883:
884: error = 0;
885:
886: end:
887: #ifdef HAVE_GSSAPI
888: if (gsstoken)
889: vfree(gsstoken);
890: #endif
891: if (pbuf)
892: vfree(pbuf);
893: if (error) {
894: VPTRINIT(iph1->sa);
895: VPTRINIT(iph1->dhpub_p);
896: VPTRINIT(iph1->nonce_p);
897: VPTRINIT(iph1->id_p);
898: VPTRINIT(iph1->cr_p);
899: }
900:
901: return error;
902: }
903:
904: /*
905: * send to initiator
906: * psk: HDR, SA, KE, Nr, IDr1, HASH_R
907: * sig: HDR, SA, KE, Nr, IDr1, [ CR, ] [ CERT, ] SIG_R
908: * gssapi: HDR, SA, KE, Nr, IDr1, GSSr, HASH_R
909: * rsa: HDR, SA, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i, HASH_R
910: * rev: HDR, SA, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDir_b>Ke_r, HASH_R
911: */
912: int
913: agg_r1send(iph1, msg)
914: struct ph1handle *iph1;
915: vchar_t *msg;
916: {
917: struct payload_list *plist = NULL;
918: int need_cert = 0;
919: int error = -1;
920: #ifdef ENABLE_HYBRID
921: vchar_t *xauth_vid = NULL;
922: vchar_t *unity_vid = NULL;
923: #endif
924: #ifdef ENABLE_NATT
925: vchar_t *vid_natt = NULL;
926: vchar_t *natd[2] = { NULL, NULL };
927: #endif
928: #ifdef ENABLE_DPD
929: vchar_t *vid_dpd = NULL;
930: #endif
931: #ifdef ENABLE_FRAG
932: vchar_t *vid_frag = NULL;
933: #endif
934:
935: #ifdef HAVE_GSSAPI
936: int gsslen;
937: vchar_t *gsstoken = NULL, *gsshash = NULL;
938: vchar_t *gss_sa = NULL;
939: int free_gss_sa = 0;
940: #endif
941:
942: /* validity check */
943: if (iph1->status != PHASE1ST_MSG1RECEIVED) {
944: plog(LLV_ERROR, LOCATION, NULL,
945: "status mismatched %d.\n", iph1->status);
946: goto end;
947: }
948:
949: /* set responder's cookie */
950: isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
951:
952: /* make ID payload into isakmp status */
953: if (ipsecdoi_setid1(iph1) < 0)
954: goto end;
955:
956: /* generate DH public value */
957: if (oakley_dh_generate(iph1->rmconf->dhgrp,
958: &iph1->dhpub, &iph1->dhpriv) < 0)
959: goto end;
960:
961: /* generate NONCE value */
962: iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
963: if (iph1->nonce == NULL)
964: goto end;
965:
966: /* compute sharing secret of DH */
967: if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
968: iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
969: goto end;
970:
971: /* generate SKEYIDs & IV & final cipher key */
972: if (oakley_skeyid(iph1) < 0)
973: goto end;
974: if (oakley_skeyid_dae(iph1) < 0)
975: goto end;
976: if (oakley_compute_enckey(iph1) < 0)
977: goto end;
978: if (oakley_newiv(iph1) < 0)
979: goto end;
980:
981: #ifdef HAVE_GSSAPI
982: if (iph1->rmconf->proposal->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
983: gssapi_get_rtoken(iph1, &gsslen);
984: #endif
985:
986: /* generate HASH to send */
987: plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_R\n");
988: iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
989: if (iph1->hash == NULL) {
990: #ifdef HAVE_GSSAPI
991: if (gssapi_more_tokens(iph1))
992: isakmp_info_send_n1(iph1,
993: ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
994: #endif
995: goto end;
996: }
997:
998: #ifdef ENABLE_NATT
999: /* Has the peer announced NAT-T? */
1000: if (NATT_AVAILABLE(iph1)) {
1001: /* set chosen VID */
1002: vid_natt = set_vendorid(iph1->natt_options->version);
1003:
1004: /* generate NAT-D payloads */
1005: plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n");
1006: if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
1007: plog(LLV_ERROR, LOCATION, NULL,
1008: "NAT-D hashing failed for %s\n", saddr2str(iph1->remote));
1009: goto end;
1010: }
1011:
1012: if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
1013: plog(LLV_ERROR, LOCATION, NULL,
1014: "NAT-D hashing failed for %s\n", saddr2str(iph1->local));
1015: goto end;
1016: }
1017: }
1018: #endif
1019: #ifdef ENABLE_DPD
1020: /* Only send DPD support if remote announced DPD and if DPD support is active */
1021: if (iph1->dpd_support && iph1->rmconf->dpd)
1022: vid_dpd = set_vendorid(VENDORID_DPD);
1023: #endif
1024: #ifdef ENABLE_FRAG
1025: if (iph1->frag) {
1026: vid_frag = set_vendorid(VENDORID_FRAG);
1027: if (vid_frag != NULL)
1028: vid_frag = isakmp_frag_addcap(vid_frag,
1029: VENDORID_FRAG_AGG);
1030: if (vid_frag == NULL)
1031: plog(LLV_ERROR, LOCATION, NULL,
1032: "Frag vendorID construction failed\n");
1033: }
1034: #endif
1035:
1036: switch (iph1->approval->authmethod) {
1037: case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1038: #ifdef ENABLE_HYBRID
1039: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1040: #endif
1041: /* set SA payload to reply */
1042: plist = isakmp_plist_append(plist,
1043: iph1->sa_ret, ISAKMP_NPTYPE_SA);
1044:
1045: /* create isakmp KE payload */
1046: plist = isakmp_plist_append(plist,
1047: iph1->dhpub, ISAKMP_NPTYPE_KE);
1048:
1049: /* create isakmp NONCE payload */
1050: plist = isakmp_plist_append(plist,
1051: iph1->nonce, ISAKMP_NPTYPE_NONCE);
1052:
1053: /* create isakmp ID payload */
1054: plist = isakmp_plist_append(plist,
1055: iph1->id, ISAKMP_NPTYPE_ID);
1056:
1057: /* create isakmp HASH payload */
1058: plist = isakmp_plist_append(plist,
1059: iph1->hash, ISAKMP_NPTYPE_HASH);
1060:
1061: /* create isakmp CR payload if needed */
1062: if (oakley_needcr(iph1->approval->authmethod))
1063: plist = oakley_append_cr(plist, iph1);
1064: break;
1065: case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1066: case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1067: #ifdef ENABLE_HYBRID
1068: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1069: case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1070: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1071: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1072: #endif
1073: /* XXX if there is CR or not ? */
1074:
1075: if (oakley_getmycert(iph1) < 0)
1076: goto end;
1077:
1078: if (oakley_getsign(iph1) < 0)
1079: goto end;
1080:
1081: if (iph1->cert != NULL && iph1->rmconf->send_cert)
1082: need_cert = 1;
1083:
1084: /* set SA payload to reply */
1085: plist = isakmp_plist_append(plist,
1086: iph1->sa_ret, ISAKMP_NPTYPE_SA);
1087:
1088: /* create isakmp KE payload */
1089: plist = isakmp_plist_append(plist,
1090: iph1->dhpub, ISAKMP_NPTYPE_KE);
1091:
1092: /* create isakmp NONCE payload */
1093: plist = isakmp_plist_append(plist,
1094: iph1->nonce, ISAKMP_NPTYPE_NONCE);
1095:
1096: /* add ID payload */
1097: plist = isakmp_plist_append(plist,
1098: iph1->id, ISAKMP_NPTYPE_ID);
1099:
1100: /* add CERT payload if there */
1101: if (need_cert)
1102: plist = isakmp_plist_append(plist, iph1->cert,
1103: ISAKMP_NPTYPE_CERT);
1104:
1105: /* add SIG payload */
1106: plist = isakmp_plist_append(plist,
1107: iph1->sig, ISAKMP_NPTYPE_SIG);
1108:
1109: /* create isakmp CR payload if needed */
1110: if (oakley_needcr(iph1->approval->authmethod))
1111: plist = oakley_append_cr(plist, iph1);
1112: break;
1113:
1114: case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1115: case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1116: #ifdef ENABLE_HYBRID
1117: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1118: case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1119: #endif
1120: break;
1121: #ifdef HAVE_GSSAPI
1122: case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1123: /* create buffer to send isakmp payload */
1124: gsshash = gssapi_wraphash(iph1);
1125: if (gsshash == NULL) {
1126: plog(LLV_ERROR, LOCATION, NULL,
1127: "failed to wrap hash\n");
1128: /*
1129: * This is probably due to the GSS
1130: * roundtrips not being finished yet.
1131: * Return this error in the hope that
1132: * a fallback to main mode will be done.
1133: */
1134: isakmp_info_send_n1(iph1,
1135: ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
1136: goto end;
1137: }
1138: if (iph1->approval->gssid != NULL)
1139: gss_sa = ipsecdoi_setph1proposal(iph1->rmconf,
1140: iph1->approval);
1141: else
1142: gss_sa = iph1->sa_ret;
1143:
1144: if (gss_sa != iph1->sa_ret)
1145: free_gss_sa = 1;
1146:
1147: /* set SA payload to reply */
1148: plist = isakmp_plist_append(plist,
1149: gss_sa, ISAKMP_NPTYPE_SA);
1150:
1151: /* create isakmp KE payload */
1152: plist = isakmp_plist_append(plist,
1153: iph1->dhpub, ISAKMP_NPTYPE_KE);
1154:
1155: /* create isakmp NONCE payload */
1156: plist = isakmp_plist_append(plist,
1157: iph1->nonce, ISAKMP_NPTYPE_NONCE);
1158:
1159: /* create isakmp ID payload */
1160: plist = isakmp_plist_append(plist,
1161: iph1->id, ISAKMP_NPTYPE_ID);
1162:
1163: /* create GSS payload */
1164: if (gssapi_get_token_to_send(iph1, &gsstoken) < 0) {
1165: plog(LLV_ERROR, LOCATION, NULL,
1166: "Failed to get gssapi token.\n");
1167: goto end;
1168: }
1169: plist = isakmp_plist_append(plist,
1170: gsstoken, ISAKMP_NPTYPE_GSS);
1171:
1172: /* create isakmp HASH payload */
1173: plist = isakmp_plist_append(plist,
1174: gsshash, ISAKMP_NPTYPE_HASH);
1175:
1176: /* append vendor id, if needed */
1177: break;
1178: #endif
1179: }
1180:
1181: #ifdef ENABLE_HYBRID
1182: if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) {
1183: plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n");
1184: if ((xauth_vid = set_vendorid(VENDORID_XAUTH)) == NULL) {
1185: plog(LLV_ERROR, LOCATION, NULL,
1186: "Cannot create Xauth vendor ID\n");
1187: goto end;
1188: }
1189: plist = isakmp_plist_append(plist,
1190: xauth_vid, ISAKMP_NPTYPE_VID);
1191: }
1192:
1193: if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) {
1194: if ((unity_vid = set_vendorid(VENDORID_UNITY)) == NULL) {
1195: plog(LLV_ERROR, LOCATION, NULL,
1196: "Cannot create Unity vendor ID\n");
1197: goto end;
1198: }
1199: plist = isakmp_plist_append(plist,
1200: unity_vid, ISAKMP_NPTYPE_VID);
1201: }
1202: #endif
1203:
1204: #ifdef ENABLE_NATT
1205: /* append NAT-T payloads */
1206: if (vid_natt) {
1207: /* chosen VID */
1208: plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID);
1209: /* NAT-D */
1210: plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d);
1211: plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d);
1212: }
1213: #endif
1214:
1215: #ifdef ENABLE_FRAG
1216: if (vid_frag)
1217: plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
1218: #endif
1219:
1220: #ifdef ENABLE_DPD
1221: if (vid_dpd)
1222: plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
1223: #endif
1224:
1225: iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
1226:
1227: #ifdef HAVE_PRINT_ISAKMP_C
1228: isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 1);
1229: #endif
1230:
1231: /* send the packet, add to the schedule to resend */
1232: if (isakmp_ph1send(iph1) == -1)
1233: goto end;
1234:
1235: /* the sending message is added to the received-list. */
1236: if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1237: plog(LLV_ERROR , LOCATION, NULL,
1238: "failed to add a response packet to the tree.\n");
1239: goto end;
1240: }
1241:
1242: iph1->status = PHASE1ST_MSG1SENT;
1243:
1244: error = 0;
1245:
1246: end:
1247: #ifdef ENABLE_HYBRID
1248: if (xauth_vid)
1249: vfree(xauth_vid);
1250: if (unity_vid)
1251: vfree(unity_vid);
1252: #endif
1253: #ifdef HAVE_GSSAPI
1254: if (gsstoken)
1255: vfree(gsstoken);
1256: if (gsshash)
1257: vfree(gsshash);
1258: if (free_gss_sa)
1259: vfree(gss_sa);
1260: #endif
1261: #ifdef ENABLE_DPD
1262: if (vid_dpd)
1263: vfree(vid_dpd);
1264: #endif
1265: #ifdef ENABLE_FRAG
1266: if (vid_frag)
1267: vfree(vid_frag);
1268: #endif
1269:
1270: return error;
1271: }
1272:
1273: /*
1274: * receive from initiator
1275: * psk: HDR, HASH_I
1276: * gssapi: HDR, HASH_I
1277: * sig: HDR, [ CERT, ] SIG_I
1278: * rsa: HDR, HASH_I
1279: * rev: HDR, HASH_I
1280: */
1281: int
1282: agg_r2recv(iph1, msg0)
1283: struct ph1handle *iph1;
1284: vchar_t *msg0;
1285: {
1286: vchar_t *msg = NULL;
1287: vchar_t *pbuf = NULL;
1288: struct isakmp_parse_t *pa;
1289: int error = -1, ptype;
1290: #ifdef ENABLE_NATT
1291: int natd_seq = 0;
1292: #endif
1293:
1294: /* validity check */
1295: if (iph1->status != PHASE1ST_MSG1SENT) {
1296: plog(LLV_ERROR, LOCATION, NULL,
1297: "status mismatched %d.\n", iph1->status);
1298: goto end;
1299: }
1300:
1301: /* decrypting if need. */
1302: /* XXX configurable ? */
1303: if (ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
1304: msg = oakley_do_decrypt(iph1, msg0,
1305: iph1->ivm->iv, iph1->ivm->ive);
1306: if (msg == NULL)
1307: goto end;
1308: } else
1309: msg = vdup(msg0);
1310:
1311: /* validate the type of next payload */
1312: pbuf = isakmp_parse(msg);
1313: if (pbuf == NULL)
1314: goto end;
1315:
1316: iph1->pl_hash = NULL;
1317:
1318: for (pa = (struct isakmp_parse_t *)pbuf->v;
1319: pa->type != ISAKMP_NPTYPE_NONE;
1320: pa++) {
1321:
1322: switch (pa->type) {
1323: case ISAKMP_NPTYPE_HASH:
1324: iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
1325: break;
1326: case ISAKMP_NPTYPE_VID:
1327: handle_vendorid(iph1, pa->ptr);
1328: break;
1329: case ISAKMP_NPTYPE_CERT:
1330: if (oakley_savecert(iph1, pa->ptr) < 0)
1331: goto end;
1332: break;
1333: case ISAKMP_NPTYPE_SIG:
1334: if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
1335: goto end;
1336: break;
1337: case ISAKMP_NPTYPE_N:
1338: isakmp_log_notify(iph1,
1339: (struct isakmp_pl_n *) pa->ptr,
1340: "aggressive exchange");
1341: break;
1342:
1343: #ifdef ENABLE_NATT
1344: case ISAKMP_NPTYPE_NATD_DRAFT:
1345: case ISAKMP_NPTYPE_NATD_RFC:
1346: if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
1347: pa->type == iph1->natt_options->payload_nat_d)
1348: {
1349: vchar_t *natd_received = NULL;
1350: int natd_verified;
1351:
1352: if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
1353: goto end;
1354:
1355: if (natd_seq == 0)
1356: iph1->natt_flags |= NAT_DETECTED;
1357:
1358: natd_verified = natt_compare_addr_hash (iph1,
1359: natd_received, natd_seq++);
1360:
1361: plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
1362: natd_seq - 1,
1363: natd_verified ? "verified" : "doesn't match");
1364:
1365: vfree (natd_received);
1366: break;
1367: }
1368: /* passthrough to default... */
1369: #endif
1370:
1371: default:
1372: /* don't send information, see isakmp_ident_r1() */
1373: plog(LLV_ERROR, LOCATION, iph1->remote,
1374: "ignore the packet, "
1375: "received unexpecting payload type %d.\n",
1376: pa->type);
1377: goto end;
1378: }
1379: }
1380:
1381: #ifdef ENABLE_NATT
1382: if (NATT_AVAILABLE(iph1))
1383: plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
1384: iph1->natt_flags & NAT_DETECTED ?
1385: "detected:" : "not detected",
1386: iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
1387: iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
1388: #endif
1389:
1390: /* validate authentication value */
1391: ptype = oakley_validate_auth(iph1);
1392: if (ptype != 0) {
1393: if (ptype == -1) {
1394: /* message printed inner oakley_validate_auth() */
1395: goto end;
1396: }
1397: evt_phase1(iph1, EVT_PHASE1_AUTH_FAILED, NULL);
1398: isakmp_info_send_n1(iph1, ptype, NULL);
1399: goto end;
1400: }
1401:
1402: iph1->status = PHASE1ST_MSG2RECEIVED;
1403:
1404: error = 0;
1405:
1406: end:
1407: if (pbuf)
1408: vfree(pbuf);
1409: if (msg)
1410: vfree(msg);
1411: if (error) {
1412: VPTRINIT(iph1->cert_p);
1413: VPTRINIT(iph1->crl_p);
1414: VPTRINIT(iph1->sig_p);
1415: }
1416:
1417: return error;
1418: }
1419:
1420: /*
1421: * status update and establish isakmp sa.
1422: */
1423: int
1424: agg_r2send(iph1, msg)
1425: struct ph1handle *iph1;
1426: vchar_t *msg;
1427: {
1428: int error = -1;
1429:
1430: /* validity check */
1431: if (iph1->status != PHASE1ST_MSG2RECEIVED) {
1432: plog(LLV_ERROR, LOCATION, NULL,
1433: "status mismatched %d.\n", iph1->status);
1434: goto end;
1435: }
1436:
1437: /* IV synchronized when packet encrypted. */
1438: /* see handler.h about IV synchronization. */
1439: if (ISSET(((struct isakmp *)msg->v)->flags, ISAKMP_FLAG_E))
1440: memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
1441:
1442: /* set encryption flag */
1443: iph1->flags |= ISAKMP_FLAG_E;
1444:
1445: iph1->status = PHASE1ST_ESTABLISHED;
1446:
1447: error = 0;
1448:
1449: end:
1450: return error;
1451: }
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