source: branches/samba-3.3.x/source/libsmb/clikrb5.c

Last change on this file was 370, checked in by Herwig Bauernfeind, 16 years ago

Update Samba 3.3 to 3.3.10 (source)
File size: 53.3 KB
RevLine 
[221]1/*
2 Unix SMB/CIFS implementation.
3 simple kerberos5 routines for active directory
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Luke Howard 2002-2003
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
7 Copyright (C) Guenther Deschner 2005-2007
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "includes.h"
[370]24#include "smb_krb5.h"
25#include "authdata.h"
[221]26
27#ifdef HAVE_KRB5
28
29#define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
30#define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
31#define GSSAPI_CHECKSUM_SIZE (12+GSSAPI_BNDLENGTH)
32
33#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
34static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
35 krb5_auth_context *auth_context,
36 krb5_creds *credsp,
37 krb5_ccache ccache,
38 krb5_data *authenticator);
39#endif
40
41/**************************************************************
42 Wrappers around kerberos string functions that convert from
43 utf8 -> unix charset and vica versa.
44**************************************************************/
45
46/**************************************************************
47 krb5_parse_name that takes a UNIX charset.
48**************************************************************/
49
50 krb5_error_code smb_krb5_parse_name(krb5_context context,
51 const char *name, /* in unix charset */
52 krb5_principal *principal)
53{
54 krb5_error_code ret;
55 char *utf8_name;
56 size_t converted_size;
57
58 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
59 return ENOMEM;
60 }
61
62 ret = krb5_parse_name(context, utf8_name, principal);
63 SAFE_FREE(utf8_name);
64 return ret;
65}
66
67#ifdef HAVE_KRB5_PARSE_NAME_NOREALM
68/**************************************************************
69 krb5_parse_name_norealm that takes a UNIX charset.
70**************************************************************/
71
72static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
73 const char *name, /* in unix charset */
74 krb5_principal *principal)
75{
76 krb5_error_code ret;
77 char *utf8_name;
78 size_t converted_size;
79
80 *principal = NULL;
81 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
82 return ENOMEM;
83 }
84
85 ret = krb5_parse_name_norealm(context, utf8_name, principal);
86 SAFE_FREE(utf8_name);
87 return ret;
88}
89#endif
90
91/**************************************************************
92 krb5_parse_name that returns a UNIX charset name. Must
93 be freed with normal free() call.
94**************************************************************/
95
96 krb5_error_code smb_krb5_unparse_name(krb5_context context,
97 krb5_const_principal principal,
98 char **unix_name)
99{
100 krb5_error_code ret;
101 char *utf8_name;
102 size_t converted_size;
103
104 *unix_name = NULL;
105 ret = krb5_unparse_name(context, principal, &utf8_name);
106 if (ret) {
107 return ret;
108 }
109
110 if (!pull_utf8_allocate(unix_name, utf8_name, &converted_size)) {
111 krb5_free_unparsed_name(context, utf8_name);
112 return ENOMEM;
113 }
114 krb5_free_unparsed_name(context, utf8_name);
115 return 0;
116}
117
118#ifndef HAVE_KRB5_SET_REAL_TIME
119/*
120 * This function is not in the Heimdal mainline.
121 */
122 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
123{
124 krb5_error_code ret;
125 int32_t sec, usec;
126
127 ret = krb5_us_timeofday(context, &sec, &usec);
128 if (ret)
129 return ret;
130
131 context->kdc_sec_offset = seconds - sec;
132 context->kdc_usec_offset = microseconds - usec;
133
134 return 0;
135}
136#endif
137
138#if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
139
140#if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
141
142/* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
143 * to krb5_set_default_tgs_ktypes. See
144 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
145 *
146 * If the MIT libraries are not exporting internal symbols, we will end up in
147 * this branch, which is correct. Otherwise we will continue to use the
148 * internal symbol
149 */
150 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
151{
152 return krb5_set_default_tgs_enctypes(ctx, enc);
153}
154
155#elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
156
157/* Heimdal */
158 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
159{
160 return krb5_set_default_in_tkt_etypes(ctx, enc);
161}
162
163#endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
164
165#endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
166
167#if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
168/* HEIMDAL */
169 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
170{
171 memset(pkaddr, '\0', sizeof(krb5_address));
172#if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
173 if (paddr->ss_family == AF_INET6) {
174 pkaddr->addr_type = KRB5_ADDRESS_INET6;
175 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
176 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
177 return true;
178 }
179#endif
180 if (paddr->ss_family == AF_INET) {
181 pkaddr->addr_type = KRB5_ADDRESS_INET;
182 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
183 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
184 return true;
185 }
186 return false;
187}
188#elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
189/* MIT */
190 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
191{
192 memset(pkaddr, '\0', sizeof(krb5_address));
193#if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
194 if (paddr->ss_family == AF_INET6) {
195 pkaddr->addrtype = ADDRTYPE_INET6;
196 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
197 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
198 return true;
199 }
200#endif
201 if (paddr->ss_family == AF_INET) {
202 pkaddr->addrtype = ADDRTYPE_INET;
203 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
204 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
205 return true;
206 }
207 return false;
208}
209#else
210#error UNKNOWN_ADDRTYPE
211#endif
212
213#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
214static int create_kerberos_key_from_string_direct(krb5_context context,
215 krb5_principal host_princ,
216 krb5_data *password,
217 krb5_keyblock *key,
218 krb5_enctype enctype)
219{
220 int ret = 0;
221 krb5_data salt;
222 krb5_encrypt_block eblock;
223
224 ret = krb5_principal2salt(context, host_princ, &salt);
225 if (ret) {
226 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
227 return ret;
228 }
229 krb5_use_enctype(context, &eblock, enctype);
230 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
231 SAFE_FREE(salt.data);
232
233 return ret;
234}
235#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
236static int create_kerberos_key_from_string_direct(krb5_context context,
237 krb5_principal host_princ,
238 krb5_data *password,
239 krb5_keyblock *key,
240 krb5_enctype enctype)
241{
242 int ret;
243 krb5_salt salt;
244
245 ret = krb5_get_pw_salt(context, host_princ, &salt);
246 if (ret) {
247 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
248 return ret;
249 }
250
251 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
252 krb5_free_salt(context, salt);
253
254 return ret;
255}
256#else
257#error UNKNOWN_CREATE_KEY_FUNCTIONS
258#endif
259
260 int create_kerberos_key_from_string(krb5_context context,
261 krb5_principal host_princ,
262 krb5_data *password,
263 krb5_keyblock *key,
264 krb5_enctype enctype,
265 bool no_salt)
266{
267 krb5_principal salt_princ = NULL;
268 int ret;
269 /*
270 * Check if we've determined that the KDC is salting keys for this
271 * principal/enctype in a non-obvious way. If it is, try to match
272 * its behavior.
273 */
274 if (no_salt) {
275 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
276 if (!KRB5_KEY_DATA(key)) {
277 return ENOMEM;
278 }
279 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
280 KRB5_KEY_LENGTH(key) = password->length;
281 KRB5_KEY_TYPE(key) = enctype;
282 return 0;
283 }
284 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
285 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
286 if (salt_princ) {
287 krb5_free_principal(context, salt_princ);
288 }
289 return ret;
290}
291
292#if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
293 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
294 krb5_enctype **enctypes)
295{
296 return krb5_get_permitted_enctypes(context, enctypes);
297}
298#elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
299 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
300 krb5_enctype **enctypes)
301{
302 return krb5_get_default_in_tkt_etypes(context, enctypes);
303}
304#else
305#error UNKNOWN_GET_ENCTYPES_FUNCTIONS
306#endif
307
308#if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
309 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
310 krb5_auth_context auth_context,
311 krb5_keyblock *keyblock)
312{
313 return krb5_auth_con_setkey(context, auth_context, keyblock);
314}
315#endif
316
317bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
318 DATA_BLOB *edata,
319 DATA_BLOB *edata_out)
320{
321 DATA_BLOB edata_contents;
322 ASN1_DATA data;
323 int edata_type;
324
325 if (!edata->length) {
326 return False;
327 }
328
329 asn1_load(&data, *edata);
330 asn1_start_tag(&data, ASN1_SEQUENCE(0));
331 asn1_start_tag(&data, ASN1_CONTEXT(1));
332 asn1_read_Integer(&data, &edata_type);
333
334 if (edata_type != KRB5_PADATA_PW_SALT) {
335 DEBUG(0,("edata is not of required type %d but of type %d\n",
336 KRB5_PADATA_PW_SALT, edata_type));
337 asn1_free(&data);
338 return False;
339 }
340
341 asn1_start_tag(&data, ASN1_CONTEXT(2));
342 asn1_read_OctetString(&data, &edata_contents);
343 asn1_end_tag(&data);
344 asn1_end_tag(&data);
345 asn1_end_tag(&data);
346 asn1_free(&data);
347
348 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
349
350 data_blob_free(&edata_contents);
351
352 return True;
353}
354
355
356bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
357{
358 DATA_BLOB pac_contents;
359 ASN1_DATA data;
360 int data_type;
361
362 if (!auth_data->length) {
363 return False;
364 }
365
366 asn1_load(&data, *auth_data);
367 asn1_start_tag(&data, ASN1_SEQUENCE(0));
368 asn1_start_tag(&data, ASN1_SEQUENCE(0));
369 asn1_start_tag(&data, ASN1_CONTEXT(0));
370 asn1_read_Integer(&data, &data_type);
371
372 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
373 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
374 asn1_free(&data);
375 return False;
376 }
377
378 asn1_end_tag(&data);
379 asn1_start_tag(&data, ASN1_CONTEXT(1));
380 asn1_read_OctetString(&data, &pac_contents);
381 asn1_end_tag(&data);
382 asn1_end_tag(&data);
383 asn1_end_tag(&data);
384 asn1_free(&data);
385
386 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
387
388 data_blob_free(&pac_contents);
389
390 return True;
391}
392
393 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
394{
395 DATA_BLOB auth_data_wrapped;
396 bool got_auth_data_pac = False;
397 int i;
398
399#if defined(HAVE_KRB5_TKT_ENC_PART2)
400 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
401 tkt->enc_part2->authorization_data[0] &&
402 tkt->enc_part2->authorization_data[0]->length)
403 {
404 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
405
406 if (tkt->enc_part2->authorization_data[i]->ad_type !=
407 KRB5_AUTHDATA_IF_RELEVANT) {
408 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
409 tkt->enc_part2->authorization_data[i]->ad_type));
410 continue;
411 }
412
413 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
414 tkt->enc_part2->authorization_data[i]->length);
415
416 /* check if it is a PAC */
417 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
418 data_blob_free(&auth_data_wrapped);
419
420 if (got_auth_data_pac) {
421 return true;
422 }
423 }
424
425 return got_auth_data_pac;
426 }
427
428#else
429 if (tkt->ticket.authorization_data &&
430 tkt->ticket.authorization_data->len)
431 {
432 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
433
434 if (tkt->ticket.authorization_data->val[i].ad_type !=
435 KRB5_AUTHDATA_IF_RELEVANT) {
436 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
437 tkt->ticket.authorization_data->val[i].ad_type));
438 continue;
439 }
440
441 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
442 tkt->ticket.authorization_data->val[i].ad_data.length);
443
444 /* check if it is a PAC */
445 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
446 data_blob_free(&auth_data_wrapped);
447
448 if (got_auth_data_pac) {
449 return true;
450 }
451 }
452
453 return got_auth_data_pac;
454 }
455#endif
456 return False;
457}
458
459 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
460{
461#if defined(HAVE_KRB5_TKT_ENC_PART2)
462 return tkt->enc_part2->client;
463#else
464 return tkt->client;
465#endif
466}
467
468#if !defined(HAVE_KRB5_LOCATE_KDC)
469
470/* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
471 * to a public interface for this functionality, so we have to be able to live
472 * without it if the MIT libraries are hiding their internal symbols.
473 */
474
475#if defined(KRB5_KRBHST_INIT)
476/* Heimdal */
477 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
478{
479 krb5_krbhst_handle hnd;
480 krb5_krbhst_info *hinfo;
481 krb5_error_code rc;
482 int num_kdcs, i;
483 struct sockaddr *sa;
484 struct addrinfo *ai;
485
486 *addr_pp = NULL;
487 *naddrs = 0;
488
489 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
490 if (rc) {
491 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
492 return rc;
493 }
494
495 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
496 ;
497
498 krb5_krbhst_reset(ctx, hnd);
499
500 if (!num_kdcs) {
501 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
502 krb5_krbhst_free(ctx, hnd);
503 return -1;
504 }
505
506 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
507 if (!sa) {
508 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
509 krb5_krbhst_free(ctx, hnd);
510 naddrs = 0;
511 return -1;
512 }
513
514 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
515
516 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
517
518#if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
519 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
520 if (rc) {
521 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
522 continue;
523 }
524#endif
525 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
526 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
527 }
528
529 krb5_krbhst_free(ctx, hnd);
530
531 *naddrs = num_kdcs;
532 *addr_pp = sa;
533 return 0;
534}
535
536#else /* ! defined(KRB5_KRBHST_INIT) */
537
538 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
539 struct sockaddr **addr_pp, int *naddrs, int get_masters)
540{
541 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
542 return KRB5_KDC_UNREACH;
543}
544
545#endif /* KRB5_KRBHST_INIT */
546
547#else /* ! HAVE_KRB5_LOCATE_KDC */
548
549 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
550 struct sockaddr **addr_pp, int *naddrs, int get_masters)
551{
552 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
553}
554
555#endif /* HAVE_KRB5_LOCATE_KDC */
556
557#if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
558 void krb5_free_unparsed_name(krb5_context context, char *val)
559{
560 SAFE_FREE(val);
561}
562#endif
563
564 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
565{
566#if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
567 if (pdata->data) {
568 krb5_free_data_contents(context, pdata);
569 }
570#else
571 SAFE_FREE(pdata->data);
572#endif
573}
574
575 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
576{
577#if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
578 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
579#elif defined(HAVE_KRB5_SESSION_IN_CREDS)
580 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
581#else
582#error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
583#endif
584}
585
586 bool kerberos_compatible_enctypes(krb5_context context,
587 krb5_enctype enctype1,
588 krb5_enctype enctype2)
589{
590#if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
591 krb5_boolean similar = 0;
592
593 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
594 return similar ? True : False;
595#elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
596 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
597#endif
598}
599
600static bool ads_cleanup_expired_creds(krb5_context context,
601 krb5_ccache ccache,
602 krb5_creds *credsp)
603{
604 krb5_error_code retval;
605 const char *cc_type = krb5_cc_get_type(context, ccache);
606
607 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
608 cc_type, krb5_cc_get_name(context, ccache),
609 http_timestring(credsp->times.endtime)));
610
611 /* we will probably need new tickets if the current ones
612 will expire within 10 seconds.
613 */
614 if (credsp->times.endtime >= (time(NULL) + 10))
615 return False;
616
617 /* heimdal won't remove creds from a file ccache, and
618 perhaps we shouldn't anyway, since internally we
619 use memory ccaches, and a FILE one probably means that
620 we're using creds obtained outside of our exectuable
621 */
622 if (strequal(cc_type, "FILE")) {
623 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
624 return False;
625 }
626
627 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
628 if (retval) {
629 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
630 error_message(retval)));
631 /* If we have an error in this, we want to display it,
632 but continue as though we deleted it */
633 }
634 return True;
635}
636
637/*
638 we can't use krb5_mk_req because w2k wants the service to be in a particular format
639*/
640static krb5_error_code ads_krb5_mk_req(krb5_context context,
641 krb5_auth_context *auth_context,
642 const krb5_flags ap_req_options,
643 const char *principal,
644 krb5_ccache ccache,
645 krb5_data *outbuf,
646 time_t *expire_time)
647{
648 krb5_error_code retval;
649 krb5_principal server;
650 krb5_creds * credsp;
651 krb5_creds creds;
652 krb5_data in_data;
653 bool creds_ready = False;
654 int i = 0, maxtries = 3;
655
656 ZERO_STRUCT(in_data);
657
658 retval = smb_krb5_parse_name(context, principal, &server);
659 if (retval) {
660 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
661 return retval;
662 }
663
664 /* obtain ticket & session key */
665 ZERO_STRUCT(creds);
666 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
667 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
668 error_message(retval)));
669 goto cleanup_princ;
670 }
671
672 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
673 /* This can commonly fail on smbd startup with no ticket in the cache.
674 * Report at higher level than 1. */
675 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
676 error_message(retval)));
677 goto cleanup_creds;
678 }
679
680 while (!creds_ready && (i < maxtries)) {
681
682 if ((retval = krb5_get_credentials(context, 0, ccache,
683 &creds, &credsp))) {
684 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
685 principal, error_message(retval)));
686 goto cleanup_creds;
687 }
688
689 /* cope with ticket being in the future due to clock skew */
690 if ((unsigned)credsp->times.starttime > time(NULL)) {
691 time_t t = time(NULL);
692 int time_offset =(int)((unsigned)credsp->times.starttime-t);
693 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
694 krb5_set_real_time(context, t + time_offset + 1, 0);
695 }
696
697 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
698 creds_ready = True;
699 }
700
701 i++;
702 }
703
704 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
705 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
706 http_timestring((unsigned)credsp->times.endtime),
707 (unsigned)credsp->times.endtime));
708
709 if (expire_time) {
710 *expire_time = (time_t)credsp->times.endtime;
711 }
712
713#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
714 if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
715 /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
716 as part of the kerberos exchange. */
717
718 DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
719
720 if( *auth_context == NULL ) {
721 /* Allocate if it has not yet been allocated. */
722 retval = krb5_auth_con_init( context, auth_context );
723 if (retval) {
724 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_init failed (%s)\n",
725 error_message(retval)));
726 goto cleanup_creds;
727 }
728 }
729
730 retval = krb5_auth_con_setuseruserkey( context, *auth_context, &credsp->keyblock );
731 if (retval) {
732 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setuseruserkey failed (%s)\n",
733 error_message(retval)));
734 goto cleanup_creds;
735 }
736
737 /* Must use a subkey for forwarded tickets. */
738 retval = krb5_auth_con_setflags( context, *auth_context, KRB5_AUTH_CONTEXT_USE_SUBKEY);
739 if (retval) {
740 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setflags failed (%s)\n",
741 error_message(retval)));
742 goto cleanup_creds;
743 }
744
745 retval = ads_krb5_get_fwd_ticket( context,
746 auth_context,
747 credsp,
748 ccache,
749 &in_data );
750 if (retval) {
751 DEBUG( 3, ("ads_krb5_get_fwd_ticket failed (%s)\n",
752 error_message( retval ) ) );
753
754 /*
755 * This is not fatal. Delete the *auth_context and continue
756 * with krb5_mk_req_extended to get a non-forwardable ticket.
757 */
758
759 if (in_data.data) {
760 free( in_data.data );
761 in_data.data = NULL;
762 in_data.length = 0;
763 }
764 krb5_auth_con_free(context, *auth_context);
765 *auth_context = NULL;
766 }
767 }
768#endif
769
770 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
771 &in_data, credsp, outbuf);
772 if (retval) {
773 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
774 error_message(retval)));
775 }
776
777 if (in_data.data) {
778 free( in_data.data );
779 in_data.length = 0;
780 }
781
782 krb5_free_creds(context, credsp);
783
784cleanup_creds:
785 krb5_free_cred_contents(context, &creds);
786
787cleanup_princ:
788 krb5_free_principal(context, server);
789
790 return retval;
791}
792
793/*
794 get a kerberos5 ticket for the given service
795*/
796int cli_krb5_get_ticket(const char *principal, time_t time_offset,
797 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
798 uint32 extra_ap_opts, const char *ccname,
799 time_t *tgs_expire)
800
801{
802 krb5_error_code retval;
803 krb5_data packet;
804 krb5_context context = NULL;
805 krb5_ccache ccdef = NULL;
806 krb5_auth_context auth_context = NULL;
807 krb5_enctype enc_types[] = {
808#ifdef ENCTYPE_ARCFOUR_HMAC
809 ENCTYPE_ARCFOUR_HMAC,
810#endif
811 ENCTYPE_DES_CBC_MD5,
812 ENCTYPE_DES_CBC_CRC,
813 ENCTYPE_NULL};
814
815 initialize_krb5_error_table();
816 retval = krb5_init_context(&context);
817 if (retval) {
818 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
819 error_message(retval)));
820 goto failed;
821 }
822
823 if (time_offset != 0) {
824 krb5_set_real_time(context, time(NULL) + time_offset, 0);
825 }
826
827 if ((retval = krb5_cc_resolve(context, ccname ?
828 ccname : krb5_cc_default_name(context), &ccdef))) {
829 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
830 error_message(retval)));
831 goto failed;
832 }
833
834 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
835 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
836 error_message(retval)));
837 goto failed;
838 }
839
840 if ((retval = ads_krb5_mk_req(context,
841 &auth_context,
842 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
843 principal,
844 ccdef, &packet,
845 tgs_expire))) {
846 goto failed;
847 }
848
849 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
850
851 *ticket = data_blob(packet.data, packet.length);
852
853 kerberos_free_data_contents(context, &packet);
854
855failed:
856
857 if ( context ) {
858 if (ccdef)
859 krb5_cc_close(context, ccdef);
860 if (auth_context)
861 krb5_auth_con_free(context, auth_context);
862 krb5_free_context(context);
863 }
864
865 return retval;
866}
867
868 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
869 {
[223]870 krb5_keyblock *skey = NULL;
871 krb5_error_code err = 0;
872 bool ret = false;
[221]873
[223]874 if (remote) {
[221]875 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
[223]876 } else {
[221]877 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
[223]878 }
[221]879
[223]880 if (err || skey == NULL) {
881 DEBUG(10, ("KRB5 error getting session key %d\n", err));
882 goto done;
883 }
[221]884
[223]885 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
886 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
887 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
888
889 ret = true;
890
891 done:
892 if (skey) {
[221]893 krb5_free_keyblock(context, skey);
894 }
895
896 return ret;
897 }
898
899
900#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
901 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
902
903 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
904{
905 static krb5_data kdata;
906
907 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
908 kdata.length = strlen((const char *)kdata.data);
909 return &kdata;
910}
911#endif
912
913 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
914{
[370]915/* Try krb5_free_keytab_entry_contents first, since
916 * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
917 * krb5_kt_free_entry but only has a prototype for the first, while the
918 * second is considered private.
919 */
920#if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
921 return krb5_free_keytab_entry_contents(context, kt_entry);
922#elif defined(HAVE_KRB5_KT_FREE_ENTRY)
[221]923 return krb5_kt_free_entry(context, kt_entry);
924#else
925#error UNKNOWN_KT_FREE_FUNCTION
926#endif
927}
928
929 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
930 struct PAC_SIGNATURE_DATA *sig)
931{
932#ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
933 cksum->cksumtype = (krb5_cksumtype)sig->type;
934 cksum->checksum.length = sig->signature.length;
935 cksum->checksum.data = sig->signature.data;
936#else
937 cksum->checksum_type = (krb5_cksumtype)sig->type;
938 cksum->length = sig->signature.length;
939 cksum->contents = sig->signature.data;
940#endif
941}
942
943 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
944 const krb5_keyblock *keyblock,
945 krb5_keyusage usage,
946 krb5_checksum *cksum,
947 uint8 *data,
948 size_t length)
949{
950 krb5_error_code ret;
951
952 /* verify the checksum */
953
954 /* welcome to the wonderful world of samba's kerberos abstraction layer:
955 *
956 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
957 * -----------------------------------------------------------------------------
958 * krb5_c_verify_checksum - works works
959 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
960 */
961
962#if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
963 {
964 krb5_boolean checksum_valid = False;
965 krb5_data input;
966
967 input.data = (char *)data;
968 input.length = length;
969
970 ret = krb5_c_verify_checksum(context,
971 keyblock,
972 usage,
973 &input,
974 cksum,
975 &checksum_valid);
976 if (ret) {
977 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
978 error_message(ret)));
979 return ret;
980 }
981
982 if (!checksum_valid)
983 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
984 }
985
986#elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
987
988 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
989 * without enctype and it ignores any key_usage types - Guenther */
990
991 {
992
993 krb5_crypto crypto;
994 ret = krb5_crypto_init(context,
995 keyblock,
996 0,
997 &crypto);
998 if (ret) {
999 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
1000 error_message(ret)));
1001 return ret;
1002 }
1003
1004 ret = krb5_verify_checksum(context,
1005 crypto,
1006 usage,
1007 data,
1008 length,
1009 cksum);
1010
1011 krb5_crypto_destroy(context, crypto);
1012 }
1013
1014#else
1015#error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
1016#endif
1017
1018 return ret;
1019}
1020
1021 time_t get_authtime_from_tkt(krb5_ticket *tkt)
1022{
1023#if defined(HAVE_KRB5_TKT_ENC_PART2)
1024 return tkt->enc_part2->times.authtime;
1025#else
1026 return tkt->ticket.authtime;
1027#endif
1028}
1029
1030#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1031static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
1032{
1033#ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
1034 if (ap_req->ticket->enc_part.kvno)
1035 return ap_req->ticket->enc_part.kvno;
1036#else /* Heimdal */
1037 if (ap_req->ticket.enc_part.kvno)
1038 return *ap_req->ticket.enc_part.kvno;
1039#endif
1040 return 0;
1041}
1042
1043static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
1044{
1045#ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
1046 return ap_req->ticket.enc_part.etype;
1047#else /* MIT */
1048 return ap_req->ticket->enc_part.enctype;
1049#endif
1050}
1051#endif /* HAVE_KRB5_DECODE_AP_REQ */
1052
1053static krb5_error_code
1054get_key_from_keytab(krb5_context context,
1055 krb5_const_principal server,
1056 krb5_enctype enctype,
1057 krb5_kvno kvno,
1058 krb5_keyblock **out_key)
1059{
1060 krb5_keytab_entry entry;
1061 krb5_error_code ret;
1062 krb5_keytab keytab;
1063 char *name = NULL;
1064 krb5_keyblock *keyp;
1065
1066 /* We have to open a new keytab handle here, as MIT does
1067 an implicit open/getnext/close on krb5_kt_get_entry. We
1068 may be in the middle of a keytab enumeration when this is
1069 called. JRA. */
1070
1071 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
1072 if (ret) {
1073 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1074 return ret;
1075 }
1076
1077 if ( DEBUGLEVEL >= 10 ) {
1078 if (smb_krb5_unparse_name(context, server, &name) == 0) {
1079 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1080 kvno, enctype, name));
1081 SAFE_FREE(name);
1082 }
1083 }
1084
1085 ret = krb5_kt_get_entry(context,
1086 keytab,
1087 server,
1088 kvno,
1089 enctype,
1090 &entry);
1091
1092 if (ret) {
1093 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1094 goto out;
1095 }
1096
1097 keyp = KRB5_KT_KEY(&entry);
1098
1099 ret = krb5_copy_keyblock(context, keyp, out_key);
1100 if (ret) {
1101 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1102 goto out;
1103 }
1104
1105 smb_krb5_kt_free_entry(context, &entry);
1106
1107out:
1108 krb5_kt_close(context, keytab);
1109 return ret;
1110}
1111
1112/* Prototypes */
1113
1114 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1115 const krb5_data *inbuf,
1116 krb5_kvno *kvno,
1117 krb5_enctype *enctype)
1118{
1119#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1120 {
1121 krb5_error_code ret;
1122 krb5_ap_req ap_req;
1123
1124 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1125 if (ret)
1126 return ret;
1127
1128 *kvno = get_kvno_from_ap_req(&ap_req);
1129 *enctype = get_enctype_from_ap_req(&ap_req);
1130
1131 free_AP_REQ(&ap_req);
1132 return 0;
1133 }
1134#endif
1135
1136 /* Possibly not an appropriate error code. */
1137 return KRB5KDC_ERR_BADOPTION;
1138}
1139
1140 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1141 krb5_auth_context *auth_context,
1142 const krb5_data *inbuf,
1143 krb5_const_principal server,
1144 krb5_keytab keytab,
1145 krb5_flags *ap_req_options,
1146 krb5_ticket **ticket,
1147 krb5_keyblock **keyblock)
1148{
1149 krb5_error_code ret;
1150 krb5_kvno kvno;
1151 krb5_enctype enctype;
1152 krb5_keyblock *local_keyblock;
1153
1154 ret = krb5_rd_req(context,
1155 auth_context,
1156 inbuf,
1157 server,
1158 keytab,
1159 ap_req_options,
1160 ticket);
1161 if (ret) {
1162 return ret;
1163 }
1164
1165#ifdef KRB5_TICKET_HAS_KEYINFO
1166 enctype = (*ticket)->enc_part.enctype;
1167 kvno = (*ticket)->enc_part.kvno;
1168#else
1169 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1170 if (ret) {
1171 return ret;
1172 }
1173#endif
1174
1175 ret = get_key_from_keytab(context,
1176 server,
1177 enctype,
1178 kvno,
1179 &local_keyblock);
1180 if (ret) {
1181 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1182 goto out;
1183 }
1184
1185out:
1186 if (ret && local_keyblock != NULL) {
1187 krb5_free_keyblock(context, local_keyblock);
1188 } else {
1189 *keyblock = local_keyblock;
1190 }
1191
1192 return ret;
1193}
1194
1195 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1196 const char *name,
1197 krb5_principal *principal)
1198{
1199#ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1200 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1201#endif
1202
1203 /* we are cheating here because parse_name will in fact set the realm.
1204 * We don't care as the only caller of smb_krb5_parse_name_norealm
1205 * ignores the realm anyway when calling
1206 * smb_krb5_principal_compare_any_realm later - Guenther */
1207
1208 return smb_krb5_parse_name(context, name, principal);
1209}
1210
1211 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1212 krb5_const_principal princ1,
1213 krb5_const_principal princ2)
1214{
1215#ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1216
1217 return krb5_principal_compare_any_realm(context, princ1, princ2);
1218
1219/* krb5_princ_size is a macro in MIT */
1220#elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1221
1222 int i, len1, len2;
1223 const krb5_data *p1, *p2;
1224
1225 len1 = krb5_princ_size(context, princ1);
1226 len2 = krb5_princ_size(context, princ2);
1227
1228 if (len1 != len2)
1229 return False;
1230
1231 for (i = 0; i < len1; i++) {
1232
1233 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1234 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1235
1236 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1237 return False;
1238 }
1239
1240 return True;
1241#else
1242#error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1243#endif
1244}
1245
1246 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1247 const char *client_string, /* gd@BER.SUSE.DE */
1248 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1249 time_t *expire_time)
1250{
1251 krb5_error_code ret;
1252 krb5_context context = NULL;
1253 krb5_ccache ccache = NULL;
1254 krb5_principal client = NULL;
1255 krb5_creds creds, creds_in, *creds_out = NULL;
1256
1257 ZERO_STRUCT(creds);
1258 ZERO_STRUCT(creds_in);
1259
1260 initialize_krb5_error_table();
1261 ret = krb5_init_context(&context);
1262 if (ret) {
1263 goto done;
1264 }
1265
1266 if (!ccache_string) {
1267 ccache_string = krb5_cc_default_name(context);
1268 }
1269
1270 if (!ccache_string) {
1271 ret = EINVAL;
1272 goto done;
1273 }
1274
1275 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1276
1277 /* FIXME: we should not fall back to defaults */
1278 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1279 if (ret) {
1280 goto done;
1281 }
1282
1283 if (client_string) {
1284 ret = smb_krb5_parse_name(context, client_string, &client);
1285 if (ret) {
1286 goto done;
1287 }
1288 } else {
1289 ret = krb5_cc_get_principal(context, ccache, &client);
1290 if (ret) {
1291 goto done;
1292 }
1293 }
1294
1295#ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1296 {
1297 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1298 if (ret) {
1299 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1300 goto done;
1301 }
1302 }
1303#elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1304 {
1305 krb5_kdc_flags flags;
1306 krb5_realm *client_realm = NULL;
1307
1308 ret = krb5_copy_principal(context, client, &creds_in.client);
1309 if (ret) {
1310 goto done;
1311 }
1312
1313 if (service_string) {
1314 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1315 if (ret) {
1316 goto done;
1317 }
1318 } else {
1319 /* build tgt service by default */
1320 client_realm = krb5_princ_realm(context, creds_in.client);
1321 if (!client_realm) {
1322 ret = ENOMEM;
1323 goto done;
1324 }
1325 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1326 if (ret) {
1327 goto done;
1328 }
1329 }
1330
1331 flags.i = 0;
1332 flags.b.renewable = flags.b.renew = True;
1333
1334 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1335 if (ret) {
1336 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1337 goto done;
1338 }
1339
1340 creds = *creds_out;
1341 }
1342#else
1343#error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1344#endif
1345
1346 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1347 ret = krb5_cc_initialize(context, ccache, client);
1348 if (ret) {
1349 goto done;
1350 }
1351
1352 ret = krb5_cc_store_cred(context, ccache, &creds);
1353
1354 if (expire_time) {
1355 *expire_time = (time_t) creds.times.endtime;
1356 }
1357
1358done:
1359 krb5_free_cred_contents(context, &creds_in);
1360
1361 if (creds_out) {
1362 krb5_free_creds(context, creds_out);
1363 } else {
1364 krb5_free_cred_contents(context, &creds);
1365 }
1366
1367 if (client) {
1368 krb5_free_principal(context, client);
1369 }
1370 if (ccache) {
1371 krb5_cc_close(context, ccache);
1372 }
1373 if (context) {
1374 krb5_free_context(context);
1375 }
1376
1377 return ret;
1378}
1379
1380 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1381{
1382 krb5_error_code ret = 0;
1383 if (addr == NULL) {
1384 return ret;
1385 }
1386#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1387 krb5_free_addresses(context, addr->addrs);
1388#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1389 ret = krb5_free_addresses(context, addr->addrs);
1390 SAFE_FREE(addr->addrs);
1391#endif
1392 SAFE_FREE(addr);
1393 addr = NULL;
1394 return ret;
1395}
1396
1397 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1398{
1399 krb5_error_code ret = 0;
1400 nstring buf;
1401#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1402 krb5_address **addrs = NULL;
1403#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1404 krb5_addresses *addrs = NULL;
1405#endif
1406
1407 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1408 if (*kerb_addr == NULL) {
1409 return ENOMEM;
1410 }
1411
1412 put_name(buf, global_myname(), ' ', 0x20);
1413
1414#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1415 {
1416 int num_addr = 2;
1417
1418 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1419 if (addrs == NULL) {
1420 SAFE_FREE(*kerb_addr);
1421 return ENOMEM;
1422 }
1423
1424 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1425
1426 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1427 if (addrs[0] == NULL) {
1428 SAFE_FREE(addrs);
1429 SAFE_FREE(*kerb_addr);
1430 return ENOMEM;
1431 }
1432
1433 addrs[0]->magic = KV5M_ADDRESS;
1434 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1435 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1436 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1437 if (addrs[0]->contents == NULL) {
1438 SAFE_FREE(addrs[0]);
1439 SAFE_FREE(addrs);
1440 SAFE_FREE(*kerb_addr);
1441 return ENOMEM;
1442 }
1443
1444 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1445
1446 addrs[1] = NULL;
1447 }
1448#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1449 {
1450 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1451 if (addrs == NULL) {
1452 SAFE_FREE(*kerb_addr);
1453 return ENOMEM;
1454 }
1455
1456 memset(addrs, 0, sizeof(krb5_addresses));
1457
1458 addrs->len = 1;
1459 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1460 if (addrs->val == NULL) {
1461 SAFE_FREE(addrs);
1462 SAFE_FREE(kerb_addr);
1463 return ENOMEM;
1464 }
1465
1466 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1467 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1468 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1469 if (addrs->val[0].address.data == NULL) {
1470 SAFE_FREE(addrs->val);
1471 SAFE_FREE(addrs);
1472 SAFE_FREE(*kerb_addr);
1473 return ENOMEM;
1474 }
1475
1476 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1477 }
1478#else
1479#error UNKNOWN_KRB5_ADDRESS_FORMAT
1480#endif
1481 (*kerb_addr)->addrs = addrs;
1482
1483 return ret;
1484}
1485
1486 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1487{
1488#ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1489 krb5_free_error_contents(context, krberror);
1490#else /* MIT */
1491 krb5_free_error(context, krberror);
1492#endif
1493}
1494
1495 krb5_error_code handle_krberror_packet(krb5_context context,
1496 krb5_data *packet)
1497{
1498 krb5_error_code ret;
1499 bool got_error_code = False;
1500
1501 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1502
1503#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1504 {
1505 krb5_error krberror;
1506
1507 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1508 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1509 error_message(ret)));
1510 return ret;
1511 }
1512
1513 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1514 ret = (krb5_error_code) krberror.error_code;
1515 got_error_code = True;
1516 }
1517
1518 smb_krb5_free_error(context, &krberror);
1519 }
1520#else /* MIT */
1521 {
1522 krb5_error *krberror;
1523
1524 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1525 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1526 error_message(ret)));
1527 return ret;
1528 }
1529
1530 if (krberror->e_data.data == NULL) {
1531 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1532 got_error_code = True;
1533 }
1534 smb_krb5_free_error(context, krberror);
1535 }
1536#endif
1537 if (got_error_code) {
1538 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1539 error_message(ret), ret));
1540 }
1541 return ret;
1542}
1543
1544 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1545 krb5_get_init_creds_opt **opt)
1546{
1547#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1548 /* Heimdal or modern MIT version */
1549 return krb5_get_init_creds_opt_alloc(context, opt);
1550#else
1551 /* Historical MIT version */
1552 krb5_get_init_creds_opt *my_opt;
1553
1554 *opt = NULL;
1555
1556 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1557 return ENOMEM;
1558 }
1559
1560 krb5_get_init_creds_opt_init(my_opt);
1561
1562 *opt = my_opt;
1563 return 0;
1564#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1565}
1566
1567 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1568 krb5_get_init_creds_opt *opt)
1569{
1570#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1571
1572#ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1573 /* Modern MIT or Heimdal version */
1574 krb5_get_init_creds_opt_free(context, opt);
1575#else
1576 /* Heimdal version */
1577 krb5_get_init_creds_opt_free(opt);
1578#endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1579
1580#else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1581 /* Historical MIT version */
1582 SAFE_FREE(opt);
1583 opt = NULL;
1584#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1585}
1586
1587 krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
1588{
1589 return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
1590}
1591
1592
1593/* caller needs to free etype_s */
1594 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1595 krb5_enctype enctype,
1596 char **etype_s)
1597{
1598#ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1599 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1600#elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1601 char buf[256];
1602 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1603 if (ret) {
1604 return ret;
1605 }
1606 *etype_s = SMB_STRDUP(buf);
1607 if (!*etype_s) {
1608 return ENOMEM;
1609 }
1610 return ret;
1611#else
1612#error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1613#endif
1614}
1615
1616 krb5_error_code smb_krb5_mk_error(krb5_context context,
1617 krb5_error_code error_code,
1618 const krb5_principal server,
1619 krb5_data *reply)
1620{
1621#ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1622 /*
1623 * The MIT interface is *terrible*.
1624 * We have to construct this ourselves...
1625 */
1626 krb5_error e;
1627
1628 memset(&e, 0, sizeof(e));
1629 krb5_us_timeofday(context, &e.stime, &e.susec);
1630 e.server = server;
1631#if defined(krb5_err_base)
1632 e.error = error_code - krb5_err_base;
1633#elif defined(ERROR_TABLE_BASE_krb5)
1634 e.error = error_code - ERROR_TABLE_BASE_krb5;
1635#else
1636 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1637#endif
1638
1639 return krb5_mk_error(context, &e, reply);
1640#else /* Heimdal. */
1641 return krb5_mk_error(context,
1642 error_code,
1643 NULL,
1644 NULL, /* e_data */
1645 NULL,
1646 server,
1647 NULL,
1648 NULL,
1649 reply);
1650#endif
1651}
1652
1653/**********************************************************************
1654 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1655 * allows to process non-default keytab names.
1656 * @param context krb5_context
1657 * @param keytab_name_req string
1658 * @param write_access bool if writable keytab is required
1659 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1660 * @return krb5_error_code
1661**********************************************************************/
1662
1663/* This MAX_NAME_LEN is a constant defined in krb5.h */
1664#ifndef MAX_KEYTAB_NAME_LEN
1665#define MAX_KEYTAB_NAME_LEN 1100
1666#endif
1667
1668 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1669 const char *keytab_name_req,
1670 bool write_access,
1671 krb5_keytab *keytab)
1672{
1673 krb5_error_code ret = 0;
1674 TALLOC_CTX *mem_ctx;
1675 char keytab_string[MAX_KEYTAB_NAME_LEN];
1676 char *kt_str = NULL;
1677 bool found_valid_name = False;
1678 const char *pragma = "FILE";
1679 const char *tmp = NULL;
1680
1681 if (!write_access && !keytab_name_req) {
1682 /* caller just wants to read the default keytab readonly, so be it */
1683 return krb5_kt_default(context, keytab);
1684 }
1685
1686 mem_ctx = talloc_init("smb_krb5_open_keytab");
1687 if (!mem_ctx) {
1688 return ENOMEM;
1689 }
1690
1691#ifdef HAVE_WRFILE_KEYTAB
1692 if (write_access) {
1693 pragma = "WRFILE";
1694 }
1695#endif
1696
1697 if (keytab_name_req) {
1698
1699 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1700 ret = KRB5_CONFIG_NOTENUFSPACE;
1701 goto out;
1702 }
1703
1704 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1705 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1706 tmp = keytab_name_req;
1707 goto resolve;
1708 }
1709
1710 if (keytab_name_req[0] != '/') {
1711 ret = KRB5_KT_BADNAME;
1712 goto out;
1713 }
1714
1715 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1716 if (!tmp) {
1717 ret = ENOMEM;
1718 goto out;
1719 }
1720
1721 goto resolve;
1722 }
1723
1724 /* we need to handle more complex keytab_strings, like:
1725 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1726
1727 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1728 if (ret) {
1729 goto out;
1730 }
1731
1732 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1733
1734 tmp = talloc_strdup(mem_ctx, keytab_string);
1735 if (!tmp) {
1736 ret = ENOMEM;
1737 goto out;
1738 }
1739
1740 if (strncmp(tmp, "ANY:", 4) == 0) {
1741 tmp += 4;
1742 }
1743
1744 memset(&keytab_string, '\0', sizeof(keytab_string));
1745
1746 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1747 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1748 found_valid_name = True;
1749 tmp = kt_str;
1750 tmp += 7;
1751 }
1752
1753 if (strncmp(kt_str, "FILE:", 5) == 0) {
1754 found_valid_name = True;
1755 tmp = kt_str;
1756 tmp += 5;
1757 }
1758
1759 if (tmp[0] == '/') {
1760 /* Treat as a FILE: keytab definition. */
1761 found_valid_name = true;
1762 }
1763
1764 if (found_valid_name) {
1765 if (tmp[0] != '/') {
1766 ret = KRB5_KT_BADNAME;
1767 goto out;
1768 }
1769
1770 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1771 if (!tmp) {
1772 ret = ENOMEM;
1773 goto out;
1774 }
1775 break;
1776 }
1777 }
1778
1779 if (!found_valid_name) {
1780 ret = KRB5_KT_UNKNOWN_TYPE;
1781 goto out;
1782 }
1783
1784 resolve:
1785 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1786 ret = krb5_kt_resolve(context, tmp, keytab);
1787
1788 out:
1789 TALLOC_FREE(mem_ctx);
1790 return ret;
1791}
1792
1793krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1794 krb5_context context,
1795 krb5_keytab keytab,
1796 const char **keytab_name)
1797{
1798 char keytab_string[MAX_KEYTAB_NAME_LEN];
1799 krb5_error_code ret = 0;
1800
1801 ret = krb5_kt_get_name(context, keytab,
1802 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1803 if (ret) {
1804 return ret;
1805 }
1806
1807 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1808 if (!*keytab_name) {
1809 return ENOMEM;
1810 }
1811
1812 return ret;
1813}
1814
1815#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
1816/**************************************************************
1817Routine: ads_krb5_get_fwd_ticket
1818 Description:
1819 When a service ticket is flagged as trusted
1820 for delegation we should provide a forwardable
1821 ticket so that the remote host can act on our
1822 behalf. This is done by taking the 2nd forwardable
1823 TGT and storing it in the GSS-API authenticator
1824 "checksum". This routine will populate
1825 the krb5_data authenticator with this TGT.
1826 Parameters:
1827 krb5_context context: The kerberos context for this authentication.
1828 krb5_auth_context: The authentication context.
1829 krb5_creds *credsp: The ticket credentials (AS-REP).
1830 krb5_ccache ccache: The credentials cache.
1831 krb5_data &authenticator: The checksum field that will store the TGT, and
1832 authenticator.data must be freed by the caller.
1833
1834 Returns:
1835 krb5_error_code: 0 if no errors, otherwise set.
1836**************************************************************/
1837
1838static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
1839 krb5_auth_context *auth_context,
1840 krb5_creds *credsp,
1841 krb5_ccache ccache,
1842 krb5_data *authenticator)
1843{
1844 krb5_data fwdData;
1845 krb5_error_code retval = 0;
1846 char *pChksum = NULL;
1847 char *p = NULL;
1848
[370]1849/* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
1850 but still has the symbol */
1851#if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
1852krb5_error_code krb5_auth_con_set_req_cksumtype(
1853 krb5_context context,
1854 krb5_auth_context auth_context,
1855 krb5_cksumtype cksumtype);
1856#endif
1857
[221]1858 ZERO_STRUCT(fwdData);
1859 ZERO_STRUCTP(authenticator);
1860
1861 retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
1862 *auth_context, /* Authentication context [in] */
1863 CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
1864 credsp->client, /* Client principal for the tgt [in] */
1865 credsp->server, /* Server principal for the tgt [in] */
1866 ccache, /* Credential cache to use for storage [in] */
1867 1, /* Turn on for "Forwardable ticket" [in] */
1868 &fwdData ); /* Resulting response [out] */
1869
1870
1871 if (retval) {
1872 DEBUG(1,("ads_krb5_get_fwd_ticket: krb5_fwd_tgt_creds failed (%s)\n",
1873 error_message(retval)));
1874 goto out;
1875 }
1876
1877 if ((unsigned int)GSSAPI_CHECKSUM_SIZE + (unsigned int)fwdData.length <
1878 (unsigned int)GSSAPI_CHECKSUM_SIZE) {
1879 retval = EINVAL;
1880 goto out;
1881 }
1882
1883 /* We're going to allocate a gssChecksum structure with a little
1884 extra data the length of the kerberos credentials length
1885 (APPLICATION 22) so that we can pack it on the end of the structure.
1886 */
1887
1888 pChksum = (char *)SMB_MALLOC(GSSAPI_CHECKSUM_SIZE + fwdData.length );
1889 if (!pChksum) {
1890 retval = ENOMEM;
1891 goto out;
1892 }
1893
1894 p = pChksum;
1895
1896 SIVAL(p, 0, GSSAPI_BNDLENGTH);
1897 p += 4;
1898
1899 /* Zero out the bindings fields */
1900 memset(p, '\0', GSSAPI_BNDLENGTH );
1901 p += GSSAPI_BNDLENGTH;
1902
1903 SIVAL(p, 0, GSS_C_DELEG_FLAG );
1904 p += 4;
1905 SSVAL(p, 0, 1 );
1906 p += 2;
1907 SSVAL(p, 0, fwdData.length );
1908 p += 2;
1909
1910 /* Migrate the kerberos KRB_CRED data to the checksum delegation */
1911 memcpy(p, fwdData.data, fwdData.length );
1912 p += fwdData.length;
1913
1914 /* We need to do this in order to allow our GSS-API */
1915 retval = krb5_auth_con_set_req_cksumtype( context, *auth_context, GSSAPI_CHECKSUM );
1916 if (retval) {
1917 goto out;
1918 }
1919
1920 /* We now have a service ticket, now turn it into an AP-REQ. */
1921 authenticator->length = fwdData.length + GSSAPI_CHECKSUM_SIZE;
1922
1923 /* Caller should call free() when they're done with this. */
1924 authenticator->data = (char *)pChksum;
1925
1926 out:
1927
1928 /* Remove that input data, we never needed it anyway. */
1929 if (fwdData.length > 0) {
1930 krb5_free_data_contents( context, &fwdData );
1931 }
1932
1933 return retval;
1934}
1935#endif
1936
[370]1937/*
1938 * smb_krb5_principal_get_realm
1939 *
1940 * @brief Get realm of a principal
1941 *
1942 * @param[in] context The krb5_context
1943 * @param[in] principal The principal
1944 * @return pointer to the realm
1945 *
1946 */
1947
1948char *smb_krb5_principal_get_realm(krb5_context context,
1949 krb5_principal principal)
1950{
1951#ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
1952 return krb5_principal_get_realm(context, principal);
1953#elif defined(krb5_princ_realm) /* MIT */
1954 krb5_data *realm;
1955 realm = krb5_princ_realm(context, principal);
1956 return (char *)realm->data;
1957#else
1958 return NULL;
1959#endif
1960}
1961
[221]1962#else /* HAVE_KRB5 */
1963 /* this saves a few linking headaches */
1964 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1965 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1966 const char *ccname, time_t *tgs_expire)
1967{
1968 DEBUG(0,("NO KERBEROS SUPPORT\n"));
1969 return 1;
1970}
1971
1972#endif
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