source: vendor/3.6.23/source3/libads/kerberos_verify.c

Last change on this file was 860, checked in by Silvan Scherrer, 11 years ago

Samba 3.6: updated vendor to latest version
File size: 19.9 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 kerberos utility library
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Remus Koos 2001
6 Copyright (C) Luke Howard 2003
7 Copyright (C) Guenther Deschner 2003, 2005
8 Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003
9 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
10 Copyright (C) Jeremy Allison 2007
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
24*/
25
26#include "includes.h"
27#include "smb_krb5.h"
28#include "libads/kerberos_proto.h"
29#include "secrets.h"
30#include "../librpc/gen_ndr/krb5pac.h"
31
32#ifdef HAVE_KRB5
33
34#if !defined(HAVE_KRB5_PRINC_COMPONENT)
35const krb5_data *krb5_princ_component(krb5_context, krb5_principal, int );
36#endif
37
38static bool ads_dedicated_keytab_verify_ticket(krb5_context context,
39 krb5_auth_context auth_context,
40 const DATA_BLOB *ticket,
41 krb5_ticket **pp_tkt,
42 krb5_keyblock **keyblock,
43 krb5_error_code *perr)
44{
45 krb5_error_code ret = 0;
46 bool auth_ok = false;
47 krb5_keytab keytab = NULL;
48 krb5_keytab_entry kt_entry;
49 krb5_ticket *dec_ticket = NULL;
50
51 krb5_data packet;
52 krb5_kvno kvno = 0;
53 krb5_enctype enctype;
54
55 *pp_tkt = NULL;
56 *keyblock = NULL;
57 *perr = 0;
58
59 ZERO_STRUCT(kt_entry);
60
61 ret = smb_krb5_open_keytab(context, lp_dedicated_keytab_file(), true,
62 &keytab);
63 if (ret) {
64 DEBUG(1, ("smb_krb5_open_keytab failed (%s)\n",
65 error_message(ret)));
66 goto out;
67 }
68
69 packet.length = ticket->length;
70 packet.data = (char *)ticket->data;
71
72 ret = krb5_rd_req(context, &auth_context, &packet, NULL, keytab,
73 NULL, &dec_ticket);
74 if (ret) {
75 DEBUG(0, ("krb5_rd_req failed (%s)\n", error_message(ret)));
76 goto out;
77 }
78
79#ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
80 enctype = dec_ticket->ticket.key.keytype;
81#else /* MIT */
82 enctype = dec_ticket->enc_part.enctype;
83 kvno = dec_ticket->enc_part.kvno;
84#endif
85
86 /* Get the key for checking the pac signature */
87 ret = krb5_kt_get_entry(context, keytab, dec_ticket->server,
88 kvno, enctype, &kt_entry);
89 if (ret) {
90 DEBUG(0, ("krb5_kt_get_entry failed (%s)\n",
91 error_message(ret)));
92 goto out;
93 }
94
95 ret = krb5_copy_keyblock(context, KRB5_KT_KEY(&kt_entry), keyblock);
96 smb_krb5_kt_free_entry(context, &kt_entry);
97
98 if (ret) {
99 DEBUG(0, ("failed to copy key: %s\n",
100 error_message(ret)));
101 goto out;
102 }
103
104 auth_ok = true;
105 *pp_tkt = dec_ticket;
106 dec_ticket = NULL;
107
108 out:
109 if (dec_ticket)
110 krb5_free_ticket(context, dec_ticket);
111
112 if (keytab)
113 krb5_kt_close(context, keytab);
114
115 *perr = ret;
116 return auth_ok;
117}
118
119/******************************************************************************
120 Try to verify a ticket using the system keytab... the system keytab has
121 kvno -1 entries, so it's more like what microsoft does... see comment in
122 utils/net_ads.c in the ads_keytab_add_entry function for details.
123******************************************************************************/
124
125static bool ads_keytab_verify_ticket(krb5_context context,
126 krb5_auth_context auth_context,
127 const DATA_BLOB *ticket,
128 krb5_ticket **pp_tkt,
129 krb5_keyblock **keyblock,
130 krb5_error_code *perr)
131{
132 krb5_error_code ret = 0;
133 bool auth_ok = False;
134 krb5_keytab keytab = NULL;
135 krb5_kt_cursor kt_cursor;
136 krb5_keytab_entry kt_entry;
137 char *valid_princ_formats[7] = { NULL, NULL, NULL,
138 NULL, NULL, NULL, NULL };
139 char *entry_princ_s = NULL;
140 fstring my_name, my_fqdn;
141 int i;
142 int number_matched_principals = 0;
143 krb5_data packet;
144 int err;
145
146 *pp_tkt = NULL;
147 *keyblock = NULL;
148 *perr = 0;
149
150 /* Generate the list of principal names which we expect
151 * clients might want to use for authenticating to the file
152 * service. We allow name$,{host,cifs}/{name,fqdn,name.REALM}. */
153
154 fstrcpy(my_name, global_myname());
155
156 my_fqdn[0] = '\0';
157 name_to_fqdn(my_fqdn, global_myname());
158
159 err = asprintf(&valid_princ_formats[0],
160 "%s$@%s", my_name, lp_realm());
161 if (err == -1) {
162 goto out;
163 }
164 err = asprintf(&valid_princ_formats[1],
165 "host/%s@%s", my_name, lp_realm());
166 if (err == -1) {
167 goto out;
168 }
169 err = asprintf(&valid_princ_formats[2],
170 "host/%s@%s", my_fqdn, lp_realm());
171 if (err == -1) {
172 goto out;
173 }
174 err = asprintf(&valid_princ_formats[3],
175 "host/%s.%s@%s", my_name, lp_realm(), lp_realm());
176 if (err == -1) {
177 goto out;
178 }
179 err = asprintf(&valid_princ_formats[4],
180 "cifs/%s@%s", my_name, lp_realm());
181 if (err == -1) {
182 goto out;
183 }
184 err = asprintf(&valid_princ_formats[5],
185 "cifs/%s@%s", my_fqdn, lp_realm());
186 if (err == -1) {
187 goto out;
188 }
189 err = asprintf(&valid_princ_formats[6],
190 "cifs/%s.%s@%s", my_name, lp_realm(), lp_realm());
191 if (err == -1) {
192 goto out;
193 }
194
195 ZERO_STRUCT(kt_entry);
196 ZERO_STRUCT(kt_cursor);
197
198 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
199 if (ret) {
200 DEBUG(1, (__location__ ": smb_krb5_open_keytab failed (%s)\n",
201 error_message(ret)));
202 goto out;
203 }
204
205 /* Iterate through the keytab. For each key, if the principal
206 * name case-insensitively matches one of the allowed formats,
207 * try verifying the ticket using that principal. */
208
209 ret = krb5_kt_start_seq_get(context, keytab, &kt_cursor);
210 if (ret) {
211 DEBUG(1, (__location__ ": krb5_kt_start_seq_get failed (%s)\n",
212 error_message(ret)));
213 goto out;
214 }
215
216 while (!auth_ok &&
217 (krb5_kt_next_entry(context, keytab,
218 &kt_entry, &kt_cursor) == 0)) {
219 ret = smb_krb5_unparse_name(talloc_tos(), context,
220 kt_entry.principal,
221 &entry_princ_s);
222 if (ret) {
223 DEBUG(1, (__location__ ": smb_krb5_unparse_name "
224 "failed (%s)\n", error_message(ret)));
225 goto out;
226 }
227
228 for (i = 0; i < ARRAY_SIZE(valid_princ_formats); i++) {
229
230 if (!strequal(entry_princ_s, valid_princ_formats[i])) {
231 continue;
232 }
233
234 number_matched_principals++;
235 packet.length = ticket->length;
236 packet.data = (char *)ticket->data;
237 *pp_tkt = NULL;
238
239 ret = krb5_rd_req_return_keyblock_from_keytab(context,
240 &auth_context, &packet,
241 kt_entry.principal, keytab,
242 NULL, pp_tkt, keyblock);
243
244 if (ret) {
245 DEBUG(10, (__location__ ": krb5_rd_req_return"
246 "_keyblock_from_keytab(%s) "
247 "failed: %s\n", entry_princ_s,
248 error_message(ret)));
249
250 /* workaround for MIT:
251 * as krb5_ktfile_get_entry will explicitly
252 * close the krb5_keytab as soon as krb5_rd_req
253 * has successfully decrypted the ticket but the
254 * ticket is not valid yet (due to clockskew)
255 * there is no point in querying more keytab
256 * entries - Guenther */
257
258 if (ret == KRB5KRB_AP_ERR_TKT_NYV ||
259 ret == KRB5KRB_AP_ERR_TKT_EXPIRED ||
260 ret == KRB5KRB_AP_ERR_SKEW) {
261 break;
262 }
263 } else {
264 DEBUG(3, (__location__ ": krb5_rd_req_return"
265 "_keyblock_from_keytab succeeded "
266 "for principal %s\n",
267 entry_princ_s));
268 auth_ok = True;
269 break;
270 }
271 }
272
273 /* Free the name we parsed. */
274 TALLOC_FREE(entry_princ_s);
275
276 /* Free the entry we just read. */
277 smb_krb5_kt_free_entry(context, &kt_entry);
278 ZERO_STRUCT(kt_entry);
279 }
280 krb5_kt_end_seq_get(context, keytab, &kt_cursor);
281
282 ZERO_STRUCT(kt_cursor);
283
284out:
285
286 for (i = 0; i < ARRAY_SIZE(valid_princ_formats); i++) {
287 SAFE_FREE(valid_princ_formats[i]);
288 }
289
290 if (!auth_ok) {
291 if (!number_matched_principals) {
292 DEBUG(3, (__location__ ": no keytab principals "
293 "matched expected file service name.\n"));
294 } else {
295 DEBUG(3, (__location__ ": krb5_rd_req failed for "
296 "all %d matched keytab principals\n",
297 number_matched_principals));
298 }
299 }
300
301 TALLOC_FREE(entry_princ_s);
302
303 {
304 krb5_keytab_entry zero_kt_entry;
305 ZERO_STRUCT(zero_kt_entry);
306 if (memcmp(&zero_kt_entry, &kt_entry,
307 sizeof(krb5_keytab_entry))) {
308 smb_krb5_kt_free_entry(context, &kt_entry);
309 }
310 }
311
312 {
313 krb5_kt_cursor zero_csr;
314 ZERO_STRUCT(zero_csr);
315 if ((memcmp(&kt_cursor, &zero_csr,
316 sizeof(krb5_kt_cursor)) != 0) && keytab) {
317 krb5_kt_end_seq_get(context, keytab, &kt_cursor);
318 }
319 }
320
321 if (keytab) {
322 krb5_kt_close(context, keytab);
323 }
324 *perr = ret;
325 return auth_ok;
326}
327
328/*****************************************************************************
329 Try to verify a ticket using the secrets.tdb.
330******************************************************************************/
331
332static krb5_error_code ads_secrets_verify_ticket(krb5_context context,
333 krb5_auth_context auth_context,
334 krb5_principal host_princ,
335 const DATA_BLOB *ticket,
336 krb5_ticket **pp_tkt,
337 krb5_keyblock **keyblock,
338 krb5_error_code *perr)
339{
340 krb5_error_code ret = 0;
341 bool auth_ok = False;
342 bool cont = true;
343 char *password_s = NULL;
344 /* Let's make some room for 2 password (old and new)*/
345 krb5_data passwords[2];
346 krb5_enctype enctypes[] = {
347#ifdef HAVE_ENCTYPE_AES256_CTS_HMAC_SHA1_96
348 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
349#endif
350#ifdef HAVE_ENCTYPE_AES128_CTS_HMAC_SHA1_96
351 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
352#endif
353 ENCTYPE_ARCFOUR_HMAC,
354 ENCTYPE_DES_CBC_CRC,
355 ENCTYPE_DES_CBC_MD5,
356 ENCTYPE_NULL
357 };
358 krb5_data packet;
359 int i, j;
360
361 *pp_tkt = NULL;
362 *keyblock = NULL;
363 *perr = 0;
364
365 ZERO_STRUCT(passwords);
366
367 if (!secrets_init()) {
368 DEBUG(1,("ads_secrets_verify_ticket: secrets_init failed\n"));
369 *perr = KRB5_CONFIG_CANTOPEN;
370 return False;
371 }
372
373 password_s = secrets_fetch_machine_password(lp_workgroup(),
374 NULL, NULL);
375 if (!password_s) {
376 DEBUG(1,(__location__ ": failed to fetch machine password\n"));
377 *perr = KRB5_LIBOS_CANTREADPWD;
378 return False;
379 }
380
381 passwords[0].data = password_s;
382 passwords[0].length = strlen(password_s);
383
384 password_s = secrets_fetch_prev_machine_password(lp_workgroup());
385 if (password_s) {
386 DEBUG(10, (__location__ ": found previous password\n"));
387 passwords[1].data = password_s;
388 passwords[1].length = strlen(password_s);
389 }
390
391 /* CIFS doesn't use addresses in tickets. This would break NAT. JRA */
392
393 packet.length = ticket->length;
394 packet.data = (char *)ticket->data;
395
396 /* We need to setup a auth context with each possible encoding type
397 * in turn. */
398 for (j=0; j<2 && passwords[j].length; j++) {
399
400 for (i=0;enctypes[i];i++) {
401 krb5_keyblock *key = NULL;
402
403 if (!(key = SMB_MALLOC_P(krb5_keyblock))) {
404 ret = ENOMEM;
405 goto out;
406 }
407
408 if (create_kerberos_key_from_string(context,
409 host_princ, &passwords[j],
410 key, enctypes[i], false)) {
411 SAFE_FREE(key);
412 continue;
413 }
414
415 krb5_auth_con_setuseruserkey(context,
416 auth_context, key);
417
418 if (!(ret = krb5_rd_req(context, &auth_context,
419 &packet, NULL, NULL,
420 NULL, pp_tkt))) {
421 DEBUG(10, (__location__ ": enc type [%u] "
422 "decrypted message !\n",
423 (unsigned int)enctypes[i]));
424 auth_ok = True;
425 cont = false;
426 krb5_copy_keyblock(context, key, keyblock);
427 krb5_free_keyblock(context, key);
428 break;
429 }
430
431 DEBUG((ret != KRB5_BAD_ENCTYPE) ? 3 : 10,
432 (__location__ ": enc type [%u] failed to "
433 "decrypt with error %s\n",
434 (unsigned int)enctypes[i],
435 error_message(ret)));
436
437 /* successfully decrypted but ticket is just not
438 * valid at the moment */
439 if (ret == KRB5KRB_AP_ERR_TKT_NYV ||
440 ret == KRB5KRB_AP_ERR_TKT_EXPIRED ||
441 ret == KRB5KRB_AP_ERR_SKEW) {
442 krb5_free_keyblock(context, key);
443 cont = false;
444 break;
445 }
446
447 krb5_free_keyblock(context, key);
448 }
449 if (!cont) {
450 /* If we found a valid pass then no need to try
451 * the next one or we have invalid ticket so no need
452 * to try next password*/
453 break;
454 }
455 }
456
457 out:
458 SAFE_FREE(passwords[0].data);
459 SAFE_FREE(passwords[1].data);
460 *perr = ret;
461 return auth_ok;
462}
463
464/*****************************************************************************
465 Verify an incoming ticket and parse out the principal name and
466 authorization_data if available.
467******************************************************************************/
468
469NTSTATUS ads_verify_ticket(TALLOC_CTX *mem_ctx,
470 const char *realm,
471 time_t time_offset,
472 const DATA_BLOB *ticket,
473 char **principal,
474 struct PAC_LOGON_INFO **logon_info,
475 DATA_BLOB *ap_rep,
476 DATA_BLOB *session_key,
477 bool use_replay_cache)
478{
479 NTSTATUS sret = NT_STATUS_LOGON_FAILURE;
480 NTSTATUS pac_ret;
481 DATA_BLOB auth_data;
482 krb5_context context = NULL;
483 krb5_auth_context auth_context = NULL;
484 krb5_data packet;
485 krb5_ticket *tkt = NULL;
486 krb5_rcache rcache = NULL;
487 krb5_keyblock *keyblock = NULL;
488 time_t authtime;
489 krb5_error_code ret = 0;
490 int flags = 0;
491 krb5_principal host_princ = NULL;
492 krb5_const_principal client_principal = NULL;
493 char *host_princ_s = NULL;
494 bool auth_ok = False;
495 bool got_auth_data = False;
496 struct named_mutex *mutex = NULL;
497
498 ZERO_STRUCT(packet);
499 ZERO_STRUCT(auth_data);
500
501 *principal = NULL;
502 *logon_info = NULL;
503 *ap_rep = data_blob_null;
504 *session_key = data_blob_null;
505
506 initialize_krb5_error_table();
507 ret = krb5_init_context(&context);
508 if (ret) {
509 DEBUG(1, (__location__ ": krb5_init_context failed (%s)\n",
510 error_message(ret)));
511 return NT_STATUS_LOGON_FAILURE;
512 }
513
514 if (time_offset != 0) {
515 krb5_set_real_time(context, time(NULL) + time_offset, 0);
516 }
517
518 ret = krb5_set_default_realm(context, realm);
519 if (ret) {
520 DEBUG(1, (__location__ ": krb5_set_default_realm "
521 "failed (%s)\n", error_message(ret)));
522 goto out;
523 }
524
525 /* This whole process is far more complex than I would
526 like. We have to go through all this to allow us to store
527 the secret internally, instead of using /etc/krb5.keytab */
528
529 ret = krb5_auth_con_init(context, &auth_context);
530 if (ret) {
531 DEBUG(1, (__location__ ": krb5_auth_con_init failed (%s)\n",
532 error_message(ret)));
533 goto out;
534 }
535
536 krb5_auth_con_getflags( context, auth_context, &flags );
537 if ( !use_replay_cache ) {
538 /* Disable default use of a replay cache */
539 flags &= ~KRB5_AUTH_CONTEXT_DO_TIME;
540 krb5_auth_con_setflags( context, auth_context, flags );
541 }
542
543 if (asprintf(&host_princ_s, "%s$", global_myname()) == -1) {
544 goto out;
545 }
546
547 strlower_m(host_princ_s);
548 ret = smb_krb5_parse_name(context, host_princ_s, &host_princ);
549 if (ret) {
550 DEBUG(1, (__location__ ": smb_krb5_parse_name(%s) "
551 "failed (%s)\n", host_princ_s, error_message(ret)));
552 goto out;
553 }
554
555
556 if (use_replay_cache) {
557
558 /* Lock a mutex surrounding the replay as there is no
559 locking in the MIT krb5 code surrounding the replay
560 cache... */
561
562 mutex = grab_named_mutex(talloc_tos(),
563 "replay cache mutex", 10);
564 if (mutex == NULL) {
565 DEBUG(1, (__location__ ": unable to protect replay "
566 "cache with mutex.\n"));
567 ret = KRB5_CC_IO;
568 goto out;
569 }
570
571 /* JRA. We must set the rcache here. This will prevent
572 replay attacks. */
573
574 ret = krb5_get_server_rcache(
575 context,
576 krb5_princ_component(context, host_princ, 0),
577 &rcache);
578 if (ret) {
579 DEBUG(1, (__location__ ": krb5_get_server_rcache "
580 "failed (%s)\n", error_message(ret)));
581 goto out;
582 }
583
584 ret = krb5_auth_con_setrcache(context, auth_context, rcache);
585 if (ret) {
586 DEBUG(1, (__location__ ": krb5_auth_con_setrcache "
587 "failed (%s)\n", error_message(ret)));
588 goto out;
589 }
590 }
591
592 switch (lp_kerberos_method()) {
593 default:
594 case KERBEROS_VERIFY_SECRETS:
595 auth_ok = ads_secrets_verify_ticket(context, auth_context,
596 host_princ, ticket, &tkt, &keyblock, &ret);
597 break;
598 case KERBEROS_VERIFY_SYSTEM_KEYTAB:
599 auth_ok = ads_keytab_verify_ticket(context, auth_context,
600 ticket, &tkt, &keyblock, &ret);
601 break;
602 case KERBEROS_VERIFY_DEDICATED_KEYTAB:
603 auth_ok = ads_dedicated_keytab_verify_ticket(context,
604 auth_context, ticket, &tkt, &keyblock, &ret);
605 break;
606 case KERBEROS_VERIFY_SECRETS_AND_KEYTAB:
607 /* First try secrets.tdb and fallback to the krb5.keytab if
608 necessary. This is the pre 3.4 behavior when
609 "use kerberos keytab" was true.*/
610 auth_ok = ads_secrets_verify_ticket(context, auth_context,
611 host_princ, ticket, &tkt, &keyblock, &ret);
612
613 if (!auth_ok) {
614 /* Only fallback if we failed to decrypt the ticket */
615 if (ret != KRB5KRB_AP_ERR_TKT_NYV &&
616 ret != KRB5KRB_AP_ERR_TKT_EXPIRED &&
617 ret != KRB5KRB_AP_ERR_SKEW) {
618 auth_ok = ads_keytab_verify_ticket(context,
619 auth_context, ticket, &tkt, &keyblock,
620 &ret);
621 }
622 }
623 break;
624 }
625
626 if (use_replay_cache) {
627 TALLOC_FREE(mutex);
628#if 0
629 /* Heimdal leaks here, if we fix the leak, MIT crashes */
630 if (rcache) {
631 krb5_rc_close(context, rcache);
632 }
633#endif
634 }
635
636 if (!auth_ok) {
637 DEBUG(3, (__location__ ": krb5_rd_req with auth "
638 "failed (%s)\n", error_message(ret)));
639 /* Try map the error return in case it's something like
640 * a clock skew error.
641 */
642 sret = krb5_to_nt_status(ret);
643 if (NT_STATUS_IS_OK(sret) ||
644 NT_STATUS_EQUAL(sret,NT_STATUS_UNSUCCESSFUL)) {
645 sret = NT_STATUS_LOGON_FAILURE;
646 }
647 DEBUG(10, (__location__ ": returning error %s\n",
648 nt_errstr(sret) ));
649 goto out;
650 }
651
652 authtime = get_authtime_from_tkt(tkt);
653 client_principal = get_principal_from_tkt(tkt);
654
655 ret = krb5_mk_rep(context, auth_context, &packet);
656 if (ret) {
657 DEBUG(3, (__location__ ": Failed to generate mutual "
658 "authentication reply (%s)\n", error_message(ret)));
659 goto out;
660 }
661
662 *ap_rep = data_blob(packet.data, packet.length);
663 if (packet.data) {
664 kerberos_free_data_contents(context, &packet);
665 ZERO_STRUCT(packet);
666 }
667
668 get_krb5_smb_session_key(mem_ctx, context,
669 auth_context, session_key, true);
670 dump_data_pw("SMB session key (from ticket)\n",
671 session_key->data, session_key->length);
672
673#if 0
674 file_save("/tmp/ticket.dat", ticket->data, ticket->length);
675#endif
676
677 /* continue when no PAC is retrieved or we couldn't decode the PAC
678 (like accounts that have the UF_NO_AUTH_DATA_REQUIRED flag set, or
679 Kerberos tickets encrypted using a DES key) - Guenther */
680
681 got_auth_data = get_auth_data_from_tkt(mem_ctx, &auth_data, tkt);
682 if (!got_auth_data) {
683 DEBUG(3, (__location__ ": did not retrieve auth data. "
684 "continuing without PAC\n"));
685 }
686
687 if (got_auth_data) {
688 struct PAC_DATA *pac_data;
689 pac_ret = decode_pac_data(mem_ctx, &auth_data, context,
690 keyblock, client_principal,
691 authtime, &pac_data);
692 data_blob_free(&auth_data);
693 if (!NT_STATUS_IS_OK(pac_ret)) {
694 DEBUG(3, (__location__ ": failed to decode "
695 "PAC_DATA: %s\n", nt_errstr(pac_ret)));
696 } else {
697 uint32_t i;
698 for (i = 0; i < pac_data->num_buffers; i++) {
699
700 if (pac_data->buffers[i].type != PAC_TYPE_LOGON_INFO) {
701 continue;
702 }
703
704 *logon_info = pac_data->buffers[i].info->logon_info.info;
705 }
706
707 if (!*logon_info) {
708 DEBUG(1, ("correctly decoded PAC but found "
709 "no logon_info! "
710 "This should not happen\n"));
711 return NT_STATUS_INVALID_USER_BUFFER;
712 }
713 }
714 }
715
716#if 0
717#if defined(HAVE_KRB5_TKT_ENC_PART2)
718 /* MIT */
719 if (tkt->enc_part2) {
720 file_save("/tmp/authdata.dat",
721 tkt->enc_part2->authorization_data[0]->contents,
722 tkt->enc_part2->authorization_data[0]->length);
723 }
724#else
725 /* Heimdal */
726 if (tkt->ticket.authorization_data) {
727 file_save("/tmp/authdata.dat",
728 tkt->ticket.authorization_data->val->ad_data.data,
729 tkt->ticket.authorization_data->val->ad_data.length);
730 }
731#endif
732#endif
733
734 ret = smb_krb5_unparse_name(mem_ctx, context,
735 client_principal, principal);
736 if (ret) {
737 DEBUG(3, (__location__ ": smb_krb5_unparse_name "
738 "failed (%s)\n", error_message(ret)));
739 sret = NT_STATUS_LOGON_FAILURE;
740 goto out;
741 }
742
743 sret = NT_STATUS_OK;
744
745out:
746
747 TALLOC_FREE(mutex);
748
749 if (!NT_STATUS_IS_OK(sret)) {
750 data_blob_free(&auth_data);
751 }
752
753 if (!NT_STATUS_IS_OK(sret)) {
754 data_blob_free(ap_rep);
755 }
756
757 if (host_princ) {
758 krb5_free_principal(context, host_princ);
759 }
760
761 if (keyblock) {
762 krb5_free_keyblock(context, keyblock);
763 }
764
765 if (tkt != NULL) {
766 krb5_free_ticket(context, tkt);
767 }
768
769 SAFE_FREE(host_princ_s);
770
771 if (auth_context) {
772 krb5_auth_con_free(context, auth_context);
773 }
774
775 if (context) {
776 krb5_free_context(context);
777 }
778
779 return sret;
780}
781
782#endif /* HAVE_KRB5 */
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