source: branches/samba-3.3.x/source/libads/kerberos_keytab.c@ 259

Last change on this file since 259 was 206, checked in by Herwig Bauernfeind, 17 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 21.9 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 kerberos keytab utility library
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Remus Koos 2001
6 Copyright (C) Luke Howard 2003
7 Copyright (C) Jim McDonough ([email protected]) 2003
8 Copyright (C) Guenther Deschner 2003
9 Copyright (C) Rakesh Patel 2004
10 Copyright (C) Dan Perry 2004
11 Copyright (C) Jeremy Allison 2004
12 Copyright (C) Gerald Carter 2006
13
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>.
26*/
27
28#include "includes.h"
29
30#ifdef HAVE_KRB5
31
32/**********************************************************************
33**********************************************************************/
34
35int smb_krb5_kt_add_entry_ext(krb5_context context,
36 krb5_keytab keytab,
37 krb5_kvno kvno,
38 const char *princ_s,
39 krb5_enctype *enctypes,
40 krb5_data password,
41 bool no_salt,
42 bool keep_old_entries)
43{
44 krb5_error_code ret = 0;
45 krb5_kt_cursor cursor;
46 krb5_keytab_entry kt_entry;
47 krb5_principal princ = NULL;
48 int i;
49 char *ktprinc = NULL;
50
51 ZERO_STRUCT(kt_entry);
52 ZERO_STRUCT(cursor);
53
54 ret = smb_krb5_parse_name(context, princ_s, &princ);
55 if (ret) {
56 DEBUG(1,("smb_krb5_kt_add_entry_ext: smb_krb5_parse_name(%s) failed (%s)\n", princ_s, error_message(ret)));
57 goto out;
58 }
59
60 /* Seek and delete old keytab entries */
61 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
62 if (ret != KRB5_KT_END && ret != ENOENT ) {
63 DEBUG(3,("smb_krb5_kt_add_entry_ext: Will try to delete old keytab entries\n"));
64 while(!krb5_kt_next_entry(context, keytab, &kt_entry, &cursor)) {
65 bool compare_name_ok = False;
66
67 ret = smb_krb5_unparse_name(context, kt_entry.principal, &ktprinc);
68 if (ret) {
69 DEBUG(1,("smb_krb5_kt_add_entry_ext: smb_krb5_unparse_name failed (%s)\n",
70 error_message(ret)));
71 goto out;
72 }
73
74 /*---------------------------------------------------------------------------
75 * Save the entries with kvno - 1. This is what microsoft does
76 * to allow people with existing sessions that have kvno - 1 to still
77 * work. Otherwise, when the password for the machine changes, all
78 * kerberizied sessions will 'break' until either the client reboots or
79 * the client's session key expires and they get a new session ticket
80 * with the new kvno.
81 */
82
83#ifdef HAVE_KRB5_KT_COMPARE
84 compare_name_ok = (krb5_kt_compare(context, &kt_entry, princ, 0, 0) == True);
85#else
86 compare_name_ok = (strcmp(ktprinc, princ_s) == 0);
87#endif
88
89 if (!compare_name_ok) {
90 DEBUG(10,("smb_krb5_kt_add_entry_ext: ignoring keytab entry principal %s, kvno = %d\n",
91 ktprinc, kt_entry.vno));
92 }
93
94 SAFE_FREE(ktprinc);
95
96 if (compare_name_ok) {
97 if (kt_entry.vno == kvno - 1) {
98 DEBUG(5,("smb_krb5_kt_add_entry_ext: Saving previous (kvno %d) entry for principal: %s.\n",
99 kvno - 1, princ_s));
100 } else if (!keep_old_entries) {
101 DEBUG(5,("smb_krb5_kt_add_entry_ext: Found old entry for principal: %s (kvno %d) - trying to remove it.\n",
102 princ_s, kt_entry.vno));
103 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
104 ZERO_STRUCT(cursor);
105 if (ret) {
106 DEBUG(1,("smb_krb5_kt_add_entry_ext: krb5_kt_end_seq_get() failed (%s)\n",
107 error_message(ret)));
108 goto out;
109 }
110 ret = krb5_kt_remove_entry(context, keytab, &kt_entry);
111 if (ret) {
112 DEBUG(1,("smb_krb5_kt_add_entry_ext: krb5_kt_remove_entry failed (%s)\n",
113 error_message(ret)));
114 goto out;
115 }
116
117 DEBUG(5,("smb_krb5_kt_add_entry_ext: removed old entry for principal: %s (kvno %d).\n",
118 princ_s, kt_entry.vno));
119
120 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
121 if (ret) {
122 DEBUG(1,("smb_krb5_kt_add_entry_ext: krb5_kt_start_seq failed (%s)\n",
123 error_message(ret)));
124 goto out;
125 }
126 ret = smb_krb5_kt_free_entry(context, &kt_entry);
127 ZERO_STRUCT(kt_entry);
128 if (ret) {
129 DEBUG(1,("smb_krb5_kt_add_entry_ext: krb5_kt_remove_entry failed (%s)\n",
130 error_message(ret)));
131 goto out;
132 }
133 continue;
134 }
135 }
136
137 /* Not a match, just free this entry and continue. */
138 ret = smb_krb5_kt_free_entry(context, &kt_entry);
139 ZERO_STRUCT(kt_entry);
140 if (ret) {
141 DEBUG(1,("smb_krb5_kt_add_entry_ext: smb_krb5_kt_free_entry failed (%s)\n", error_message(ret)));
142 goto out;
143 }
144 }
145
146 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
147 ZERO_STRUCT(cursor);
148 if (ret) {
149 DEBUG(1,("smb_krb5_kt_add_entry_ext: krb5_kt_end_seq_get failed (%s)\n",error_message(ret)));
150 goto out;
151 }
152 }
153
154 /* Ensure we don't double free. */
155 ZERO_STRUCT(kt_entry);
156 ZERO_STRUCT(cursor);
157
158 /* If we get here, we have deleted all the old entries with kvno's not equal to the current kvno-1. */
159
160 /* Now add keytab entries for all encryption types */
161 for (i = 0; enctypes[i]; i++) {
162 krb5_keyblock *keyp;
163
164 keyp = KRB5_KT_KEY(&kt_entry);
165
166 if (create_kerberos_key_from_string(context, princ, &password, keyp, enctypes[i], no_salt)) {
167 continue;
168 }
169
170 kt_entry.principal = princ;
171 kt_entry.vno = kvno;
172
173 DEBUG(3,("smb_krb5_kt_add_entry_ext: adding keytab entry for (%s) with encryption type (%d) and version (%d)\n",
174 princ_s, enctypes[i], kt_entry.vno));
175 ret = krb5_kt_add_entry(context, keytab, &kt_entry);
176 krb5_free_keyblock_contents(context, keyp);
177 ZERO_STRUCT(kt_entry);
178 if (ret) {
179 DEBUG(1,("smb_krb5_kt_add_entry_ext: adding entry to keytab failed (%s)\n", error_message(ret)));
180 goto out;
181 }
182 }
183
184
185out:
186 {
187 krb5_keytab_entry zero_kt_entry;
188 ZERO_STRUCT(zero_kt_entry);
189 if (memcmp(&zero_kt_entry, &kt_entry, sizeof(krb5_keytab_entry))) {
190 smb_krb5_kt_free_entry(context, &kt_entry);
191 }
192 }
193 if (princ) {
194 krb5_free_principal(context, princ);
195 }
196
197 {
198 krb5_kt_cursor zero_csr;
199 ZERO_STRUCT(zero_csr);
200 if ((memcmp(&cursor, &zero_csr, sizeof(krb5_kt_cursor)) != 0) && keytab) {
201 krb5_kt_end_seq_get(context, keytab, &cursor);
202 }
203 }
204
205 return (int)ret;
206}
207
208static int smb_krb5_kt_add_entry(krb5_context context,
209 krb5_keytab keytab,
210 krb5_kvno kvno,
211 const char *princ_s,
212 krb5_enctype *enctypes,
213 krb5_data password)
214{
215 return smb_krb5_kt_add_entry_ext(context,
216 keytab,
217 kvno,
218 princ_s,
219 enctypes,
220 password,
221 false,
222 false);
223}
224
225/**********************************************************************
226 Adds a single service principal, i.e. 'host' to the system keytab
227***********************************************************************/
228
229int ads_keytab_add_entry(ADS_STRUCT *ads, const char *srvPrinc)
230{
231 krb5_error_code ret = 0;
232 krb5_context context = NULL;
233 krb5_keytab keytab = NULL;
234 krb5_data password;
235 krb5_kvno kvno;
236 krb5_enctype enctypes[4] = { ENCTYPE_DES_CBC_CRC, ENCTYPE_DES_CBC_MD5, 0, 0 };
237 char *princ_s = NULL, *short_princ_s = NULL;
238 char *password_s = NULL;
239 char *my_fqdn;
240 TALLOC_CTX *ctx = NULL;
241 char *machine_name;
242
243#if defined(ENCTYPE_ARCFOUR_HMAC)
244 enctypes[2] = ENCTYPE_ARCFOUR_HMAC;
245#endif
246
247 initialize_krb5_error_table();
248 ret = krb5_init_context(&context);
249 if (ret) {
250 DEBUG(1,("ads_keytab_add_entry: could not krb5_init_context: %s\n",error_message(ret)));
251 return -1;
252 }
253
254 ret = smb_krb5_open_keytab(context, NULL, True, &keytab);
255 if (ret) {
256 DEBUG(1,("ads_keytab_add_entry: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
257 goto out;
258 }
259
260 /* retrieve the password */
261 if (!secrets_init()) {
262 DEBUG(1,("ads_keytab_add_entry: secrets_init failed\n"));
263 ret = -1;
264 goto out;
265 }
266 password_s = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
267 if (!password_s) {
268 DEBUG(1,("ads_keytab_add_entry: failed to fetch machine password\n"));
269 ret = -1;
270 goto out;
271 }
272 ZERO_STRUCT(password);
273 password.data = password_s;
274 password.length = strlen(password_s);
275
276 /* we need the dNSHostName value here */
277
278 if ( (ctx = talloc_init("ads_keytab_add_entry")) == NULL ) {
279 DEBUG(0,("ads_keytab_add_entry: talloc() failed!\n"));
280 ret = -1;
281 goto out;
282 }
283
284 if ( (my_fqdn = ads_get_dnshostname( ads, ctx, global_myname())) == NULL ) {
285 DEBUG(0,("ads_keytab_add_entry: unable to determine machine account's dns name in AD!\n"));
286 ret = -1;
287 goto out;
288 }
289
290 if ( (machine_name = ads_get_samaccountname( ads, ctx, global_myname())) == NULL ) {
291 DEBUG(0,("ads_keytab_add_entry: unable to determine machine account's short name in AD!\n"));
292 ret = -1;
293 goto out;
294 }
295 /*strip the trailing '$' */
296 machine_name[strlen(machine_name)-1] = '\0';
297
298 /* Construct our principal */
299
300 if (strchr_m(srvPrinc, '@')) {
301 /* It's a fully-named principal. */
302 if (asprintf(&princ_s, "%s", srvPrinc) == -1) {
303 ret = -1;
304 goto out;
305 }
306 } else if (srvPrinc[strlen(srvPrinc)-1] == '$') {
307 /* It's the machine account, as used by smbclient clients. */
308 if (asprintf(&princ_s, "%s@%s", srvPrinc, lp_realm()) == -1) {
309 ret = -1;
310 goto out;
311 }
312 } else {
313 /* It's a normal service principal. Add the SPN now so that we
314 * can obtain credentials for it and double-check the salt value
315 * used to generate the service's keys. */
316
317 if (asprintf(&princ_s, "%s/%s@%s", srvPrinc, my_fqdn, lp_realm()) == -1) {
318 ret = -1;
319 goto out;
320 }
321 if (asprintf(&short_princ_s, "%s/%s@%s", srvPrinc, machine_name, lp_realm()) == -1) {
322 ret = -1;
323 goto out;
324 }
325
326 /* According to http://support.microsoft.com/kb/326985/en-us,
327 certain principal names are automatically mapped to the host/...
328 principal in the AD account. So only create these in the
329 keytab, not in AD. --jerry */
330
331 if ( !strequal( srvPrinc, "cifs" ) && !strequal(srvPrinc, "host" ) ) {
332 DEBUG(3,("ads_keytab_add_entry: Attempting to add/update '%s'\n", princ_s));
333
334 if (!ADS_ERR_OK(ads_add_service_principal_name(ads, global_myname(), my_fqdn, srvPrinc))) {
335 DEBUG(1,("ads_keytab_add_entry: ads_add_service_principal_name failed.\n"));
336 goto out;
337 }
338 }
339 }
340
341 kvno = (krb5_kvno) ads_get_machine_kvno(ads, global_myname());
342 if (kvno == -1) { /* -1 indicates failure, everything else is OK */
343 DEBUG(1,("ads_keytab_add_entry: ads_get_machine_kvno failed to determine the system's kvno.\n"));
344 ret = -1;
345 goto out;
346 }
347
348 /* add the fqdn principal to the keytab */
349
350 ret = smb_krb5_kt_add_entry( context, keytab, kvno, princ_s, enctypes, password );
351 if ( ret ) {
352 DEBUG(1,("ads_keytab_add_entry: Failed to add entry to keytab file\n"));
353 goto out;
354 }
355
356 /* add the short principal name if we have one */
357
358 if ( short_princ_s ) {
359 ret = smb_krb5_kt_add_entry( context, keytab, kvno, short_princ_s, enctypes, password );
360 if ( ret ) {
361 DEBUG(1,("ads_keytab_add_entry: Failed to add short entry to keytab file\n"));
362 goto out;
363 }
364 }
365
366out:
367 SAFE_FREE( princ_s );
368 SAFE_FREE( short_princ_s );
369 TALLOC_FREE( ctx );
370
371 if (keytab) {
372 krb5_kt_close(context, keytab);
373 }
374 if (context) {
375 krb5_free_context(context);
376 }
377 return (int)ret;
378}
379
380/**********************************************************************
381 Flushes all entries from the system keytab.
382***********************************************************************/
383
384int ads_keytab_flush(ADS_STRUCT *ads)
385{
386 krb5_error_code ret = 0;
387 krb5_context context = NULL;
388 krb5_keytab keytab = NULL;
389 krb5_kt_cursor cursor;
390 krb5_keytab_entry kt_entry;
391 krb5_kvno kvno;
392
393 ZERO_STRUCT(kt_entry);
394 ZERO_STRUCT(cursor);
395
396 initialize_krb5_error_table();
397 ret = krb5_init_context(&context);
398 if (ret) {
399 DEBUG(1,("ads_keytab_flush: could not krb5_init_context: %s\n",error_message(ret)));
400 return ret;
401 }
402
403 ret = smb_krb5_open_keytab(context, NULL, True, &keytab);
404 if (ret) {
405 DEBUG(1,("ads_keytab_flush: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
406 goto out;
407 }
408
409 kvno = (krb5_kvno) ads_get_machine_kvno(ads, global_myname());
410 if (kvno == -1) { /* -1 indicates a failure */
411 DEBUG(1,("ads_keytab_flush: Error determining the system's kvno.\n"));
412 goto out;
413 }
414
415 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
416 if (ret != KRB5_KT_END && ret != ENOENT) {
417 while (!krb5_kt_next_entry(context, keytab, &kt_entry, &cursor)) {
418 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
419 ZERO_STRUCT(cursor);
420 if (ret) {
421 DEBUG(1,("ads_keytab_flush: krb5_kt_end_seq_get() failed (%s)\n",error_message(ret)));
422 goto out;
423 }
424 ret = krb5_kt_remove_entry(context, keytab, &kt_entry);
425 if (ret) {
426 DEBUG(1,("ads_keytab_flush: krb5_kt_remove_entry failed (%s)\n",error_message(ret)));
427 goto out;
428 }
429 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
430 if (ret) {
431 DEBUG(1,("ads_keytab_flush: krb5_kt_start_seq failed (%s)\n",error_message(ret)));
432 goto out;
433 }
434 ret = smb_krb5_kt_free_entry(context, &kt_entry);
435 ZERO_STRUCT(kt_entry);
436 if (ret) {
437 DEBUG(1,("ads_keytab_flush: krb5_kt_remove_entry failed (%s)\n",error_message(ret)));
438 goto out;
439 }
440 }
441 }
442
443 /* Ensure we don't double free. */
444 ZERO_STRUCT(kt_entry);
445 ZERO_STRUCT(cursor);
446
447 if (!ADS_ERR_OK(ads_clear_service_principal_names(ads, global_myname()))) {
448 DEBUG(1,("ads_keytab_flush: Error while clearing service principal listings in LDAP.\n"));
449 goto out;
450 }
451
452out:
453
454 {
455 krb5_keytab_entry zero_kt_entry;
456 ZERO_STRUCT(zero_kt_entry);
457 if (memcmp(&zero_kt_entry, &kt_entry, sizeof(krb5_keytab_entry))) {
458 smb_krb5_kt_free_entry(context, &kt_entry);
459 }
460 }
461 {
462 krb5_kt_cursor zero_csr;
463 ZERO_STRUCT(zero_csr);
464 if ((memcmp(&cursor, &zero_csr, sizeof(krb5_kt_cursor)) != 0) && keytab) {
465 krb5_kt_end_seq_get(context, keytab, &cursor);
466 }
467 }
468 if (keytab) {
469 krb5_kt_close(context, keytab);
470 }
471 if (context) {
472 krb5_free_context(context);
473 }
474 return ret;
475}
476
477/**********************************************************************
478 Adds all the required service principals to the system keytab.
479***********************************************************************/
480
481int ads_keytab_create_default(ADS_STRUCT *ads)
482{
483 krb5_error_code ret = 0;
484 krb5_context context = NULL;
485 krb5_keytab keytab = NULL;
486 krb5_kt_cursor cursor;
487 krb5_keytab_entry kt_entry;
488 krb5_kvno kvno;
489 int i, found = 0;
490 char *sam_account_name, *upn;
491 char **oldEntries = NULL, *princ_s[26];
492 TALLOC_CTX *ctx = NULL;
493 fstring machine_name;
494
495 memset(princ_s, '\0', sizeof(princ_s));
496
497 fstrcpy( machine_name, global_myname() );
498
499 /* these are the main ones we need */
500
501 if ( (ret = ads_keytab_add_entry(ads, "host") ) != 0 ) {
502 DEBUG(1,("ads_keytab_create_default: ads_keytab_add_entry failed while adding 'host'.\n"));
503 return ret;
504 }
505
506
507#if 0 /* don't create the CIFS/... keytab entries since no one except smbd
508 really needs them and we will fall back to verifying against secrets.tdb */
509
510 if ( (ret = ads_keytab_add_entry(ads, "cifs")) != 0 ) {
511 DEBUG(1,("ads_keytab_create_default: ads_keytab_add_entry failed while adding 'cifs'.\n"));
512 return ret;
513 }
514#endif
515
516 if ( (ctx = talloc_init("ads_keytab_create_default")) == NULL ) {
517 DEBUG(0,("ads_keytab_create_default: talloc() failed!\n"));
518 return -1;
519 }
520
521 /* now add the userPrincipalName and sAMAccountName entries */
522
523 if ( (sam_account_name = ads_get_samaccountname( ads, ctx, machine_name)) == NULL ) {
524 DEBUG(0,("ads_keytab_add_entry: unable to determine machine account's name in AD!\n"));
525 TALLOC_FREE( ctx );
526 return -1;
527 }
528
529 /* upper case the sAMAccountName to make it easier for apps to
530 know what case to use in the keytab file */
531
532 strupper_m( sam_account_name );
533
534 if ( (ret = ads_keytab_add_entry(ads, sam_account_name )) != 0 ) {
535 DEBUG(1,("ads_keytab_create_default: ads_keytab_add_entry failed while adding sAMAccountName (%s)\n",
536 sam_account_name));
537 return ret;
538 }
539
540 /* remember that not every machine account will have a upn */
541
542 upn = ads_get_upn( ads, ctx, machine_name);
543 if ( upn ) {
544 if ( (ret = ads_keytab_add_entry(ads, upn)) != 0 ) {
545 DEBUG(1,("ads_keytab_create_default: ads_keytab_add_entry failed while adding UPN (%s)\n",
546 upn));
547 TALLOC_FREE( ctx );
548 return ret;
549 }
550 }
551
552 TALLOC_FREE( ctx );
553
554 /* Now loop through the keytab and update any other existing entries... */
555
556 kvno = (krb5_kvno) ads_get_machine_kvno(ads, machine_name);
557 if (kvno == -1) {
558 DEBUG(1,("ads_keytab_create_default: ads_get_machine_kvno failed to determine the system's kvno.\n"));
559 return -1;
560 }
561
562 DEBUG(3,("ads_keytab_create_default: Searching for keytab entries to "
563 "preserve and update.\n"));
564
565 ZERO_STRUCT(kt_entry);
566 ZERO_STRUCT(cursor);
567
568 initialize_krb5_error_table();
569 ret = krb5_init_context(&context);
570 if (ret) {
571 DEBUG(1,("ads_keytab_create_default: could not krb5_init_context: %s\n",error_message(ret)));
572 return ret;
573 }
574
575 ret = smb_krb5_open_keytab(context, NULL, True, &keytab);
576 if (ret) {
577 DEBUG(1,("ads_keytab_create_default: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
578 goto done;
579 }
580
581 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
582 if (ret != KRB5_KT_END && ret != ENOENT ) {
583 while ((ret = krb5_kt_next_entry(context, keytab, &kt_entry, &cursor)) == 0) {
584 smb_krb5_kt_free_entry(context, &kt_entry);
585 ZERO_STRUCT(kt_entry);
586 found++;
587 }
588 }
589 krb5_kt_end_seq_get(context, keytab, &cursor);
590 ZERO_STRUCT(cursor);
591
592 /*
593 * Hmmm. There is no "rewind" function for the keytab. This means we have a race condition
594 * where someone else could add entries after we've counted them. Re-open asap to minimise
595 * the race. JRA.
596 */
597
598 DEBUG(3, ("ads_keytab_create_default: Found %d entries in the keytab.\n", found));
599 if (!found) {
600 goto done;
601 }
602 oldEntries = SMB_MALLOC_ARRAY(char *, found );
603 if (!oldEntries) {
604 DEBUG(1,("ads_keytab_create_default: Failed to allocate space to store the old keytab entries (malloc failed?).\n"));
605 ret = -1;
606 goto done;
607 }
608 memset(oldEntries, '\0', found * sizeof(char *));
609
610 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
611 if (ret != KRB5_KT_END && ret != ENOENT ) {
612 while (krb5_kt_next_entry(context, keytab, &kt_entry, &cursor) == 0) {
613 if (kt_entry.vno != kvno) {
614 char *ktprinc = NULL;
615 char *p;
616
617 /* This returns a malloc'ed string in ktprinc. */
618 ret = smb_krb5_unparse_name(context, kt_entry.principal, &ktprinc);
619 if (ret) {
620 DEBUG(1,("smb_krb5_unparse_name failed (%s)\n", error_message(ret)));
621 goto done;
622 }
623 /*
624 * From looking at the krb5 source they don't seem to take locale
625 * or mb strings into account. Maybe this is because they assume utf8 ?
626 * In this case we may need to convert from utf8 to mb charset here ? JRA.
627 */
628 p = strchr_m(ktprinc, '@');
629 if (p) {
630 *p = '\0';
631 }
632
633 p = strchr_m(ktprinc, '/');
634 if (p) {
635 *p = '\0';
636 }
637 for (i = 0; i < found; i++) {
638 if (!oldEntries[i]) {
639 oldEntries[i] = ktprinc;
640 break;
641 }
642 if (!strcmp(oldEntries[i], ktprinc)) {
643 SAFE_FREE(ktprinc);
644 break;
645 }
646 }
647 if (i == found) {
648 SAFE_FREE(ktprinc);
649 }
650 }
651 smb_krb5_kt_free_entry(context, &kt_entry);
652 ZERO_STRUCT(kt_entry);
653 }
654 ret = 0;
655 for (i = 0; oldEntries[i]; i++) {
656 ret |= ads_keytab_add_entry(ads, oldEntries[i]);
657 SAFE_FREE(oldEntries[i]);
658 }
659 krb5_kt_end_seq_get(context, keytab, &cursor);
660 }
661 ZERO_STRUCT(cursor);
662
663done:
664
665 SAFE_FREE(oldEntries);
666
667 {
668 krb5_keytab_entry zero_kt_entry;
669 ZERO_STRUCT(zero_kt_entry);
670 if (memcmp(&zero_kt_entry, &kt_entry, sizeof(krb5_keytab_entry))) {
671 smb_krb5_kt_free_entry(context, &kt_entry);
672 }
673 }
674 {
675 krb5_kt_cursor zero_csr;
676 ZERO_STRUCT(zero_csr);
677 if ((memcmp(&cursor, &zero_csr, sizeof(krb5_kt_cursor)) != 0) && keytab) {
678 krb5_kt_end_seq_get(context, keytab, &cursor);
679 }
680 }
681 if (keytab) {
682 krb5_kt_close(context, keytab);
683 }
684 if (context) {
685 krb5_free_context(context);
686 }
687 return ret;
688}
689
690/**********************************************************************
691 List system keytab.
692***********************************************************************/
693
694int ads_keytab_list(const char *keytab_name)
695{
696 krb5_error_code ret = 0;
697 krb5_context context = NULL;
698 krb5_keytab keytab = NULL;
699 krb5_kt_cursor cursor;
700 krb5_keytab_entry kt_entry;
701
702 ZERO_STRUCT(kt_entry);
703 ZERO_STRUCT(cursor);
704
705 initialize_krb5_error_table();
706 ret = krb5_init_context(&context);
707 if (ret) {
708 DEBUG(1,("ads_keytab_list: could not krb5_init_context: %s\n",error_message(ret)));
709 return ret;
710 }
711
712 ret = smb_krb5_open_keytab(context, keytab_name, False, &keytab);
713 if (ret) {
714 DEBUG(1,("ads_keytab_list: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
715 goto out;
716 }
717
718 ret = krb5_kt_start_seq_get(context, keytab, &cursor);
719 if (ret) {
720 goto out;
721 }
722
723 printf("Vno Type Principal\n");
724
725 while (krb5_kt_next_entry(context, keytab, &kt_entry, &cursor) == 0) {
726
727 char *princ_s = NULL;
728 char *etype_s = NULL;
729 krb5_enctype enctype = 0;
730
731 ret = smb_krb5_unparse_name(context, kt_entry.principal, &princ_s);
732 if (ret) {
733 goto out;
734 }
735
736 enctype = smb_get_enctype_from_kt_entry(&kt_entry);
737
738 ret = smb_krb5_enctype_to_string(context, enctype, &etype_s);
739 if (ret) {
740 if (asprintf(&etype_s, "UNKNOWN: %d\n", enctype) == -1)
741 {
742 SAFE_FREE(princ_s);
743 goto out;
744 }
745 }
746
747 printf("%3d %s\t\t %s\n", kt_entry.vno, etype_s, princ_s);
748
749 SAFE_FREE(princ_s);
750 SAFE_FREE(etype_s);
751
752 ret = smb_krb5_kt_free_entry(context, &kt_entry);
753 if (ret) {
754 goto out;
755 }
756 }
757
758 ret = krb5_kt_end_seq_get(context, keytab, &cursor);
759 if (ret) {
760 goto out;
761 }
762
763 /* Ensure we don't double free. */
764 ZERO_STRUCT(kt_entry);
765 ZERO_STRUCT(cursor);
766out:
767
768 {
769 krb5_keytab_entry zero_kt_entry;
770 ZERO_STRUCT(zero_kt_entry);
771 if (memcmp(&zero_kt_entry, &kt_entry, sizeof(krb5_keytab_entry))) {
772 smb_krb5_kt_free_entry(context, &kt_entry);
773 }
774 }
775 {
776 krb5_kt_cursor zero_csr;
777 ZERO_STRUCT(zero_csr);
778 if ((memcmp(&cursor, &zero_csr, sizeof(krb5_kt_cursor)) != 0) && keytab) {
779 krb5_kt_end_seq_get(context, keytab, &cursor);
780 }
781 }
782
783 if (keytab) {
784 krb5_kt_close(context, keytab);
785 }
786 if (context) {
787 krb5_free_context(context);
788 }
789 return ret;
790}
791
792#endif /* HAVE_KRB5 */
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