source: trunk/server/source3/lib/smbconf/smbconf_reg.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 28.5 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * libsmbconf - Samba configuration library, registry backend
4 * Copyright (C) Michael Adam 2008
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include "includes.h"
21#include "lib/smbconf/smbconf_private.h"
22#include "registry.h"
23#include "registry/reg_api.h"
24#include "registry/reg_backend_db.h"
25#include "registry/reg_util_token.h"
26#include "registry/reg_api_util.h"
27#include "registry/reg_init_smbconf.h"
28#include "lib/smbconf/smbconf_init.h"
29#include "lib/smbconf/smbconf_reg.h"
30#include "../libcli/registry/util_reg.h"
31
32#define INCLUDES_VALNAME "includes"
33
34struct reg_private_data {
35 struct registry_key *base_key;
36 bool open; /* did _we_ open the registry? */
37};
38
39/**********************************************************************
40 *
41 * helper functions
42 *
43 **********************************************************************/
44
45/**
46 * a convenience helper to cast the private data structure
47 */
48static struct reg_private_data *rpd(struct smbconf_ctx *ctx)
49{
50 return (struct reg_private_data *)(ctx->data);
51}
52
53/*
54 * check whether a given value name is forbidden in registry (smbconf)
55 */
56static bool smbconf_reg_valname_forbidden(const char *valname)
57{
58 /* hard code the list of forbidden names here for now */
59 const char *forbidden_valnames[] = {
60 "lock directory",
61 "lock dir",
62 "config backend",
63 "include",
64 "includes", /* this has a special meaning internally */
65 NULL
66 };
67 const char **forbidden = NULL;
68
69 for (forbidden = forbidden_valnames; *forbidden != NULL; forbidden++) {
70 if (strwicmp(valname, *forbidden) == 0) {
71 return true;
72 }
73 }
74 return false;
75}
76
77static bool smbconf_reg_valname_valid(const char *valname)
78{
79 return (!smbconf_reg_valname_forbidden(valname) &&
80 lp_parameter_is_valid(valname));
81}
82
83/**
84 * Open a subkey of the base key (i.e a service)
85 */
86static sbcErr smbconf_reg_open_service_key(TALLOC_CTX *mem_ctx,
87 struct smbconf_ctx *ctx,
88 const char *servicename,
89 uint32 desired_access,
90 struct registry_key **key)
91{
92 WERROR werr;
93
94 if (servicename == NULL) {
95 *key = rpd(ctx)->base_key;
96 return SBC_ERR_OK;
97 }
98 werr = reg_openkey(mem_ctx, rpd(ctx)->base_key, servicename,
99 desired_access, key);
100 if (W_ERROR_EQUAL(werr, WERR_BADFILE)) {
101 return SBC_ERR_NO_SUCH_SERVICE;
102 }
103 if (!W_ERROR_IS_OK(werr)) {
104 return SBC_ERR_NOMEM;
105 }
106
107 return SBC_ERR_OK;
108}
109
110/**
111 * check if a value exists in a given registry key
112 */
113static bool smbconf_value_exists(struct registry_key *key, const char *param)
114{
115 bool ret = false;
116 WERROR werr = WERR_OK;
117 TALLOC_CTX *ctx = talloc_stackframe();
118 struct registry_value *value = NULL;
119
120 werr = reg_queryvalue(ctx, key, param, &value);
121 if (W_ERROR_IS_OK(werr)) {
122 ret = true;
123 }
124
125 talloc_free(ctx);
126 return ret;
127}
128
129/**
130 * create a subkey of the base key (i.e. a service...)
131 */
132static sbcErr smbconf_reg_create_service_key(TALLOC_CTX *mem_ctx,
133 struct smbconf_ctx *ctx,
134 const char * subkeyname,
135 struct registry_key **newkey)
136{
137 WERROR werr;
138 sbcErr err = SBC_ERR_OK;
139 TALLOC_CTX *create_ctx;
140 enum winreg_CreateAction action = REG_ACTION_NONE;
141
142 /* create a new talloc ctx for creation. it will hold
143 * the intermediate parent key (SMBCONF) for creation
144 * and will be destroyed when leaving this function... */
145 create_ctx = talloc_stackframe();
146
147 werr = reg_createkey(mem_ctx, rpd(ctx)->base_key, subkeyname,
148 REG_KEY_WRITE, newkey, &action);
149 if (W_ERROR_IS_OK(werr) && (action != REG_CREATED_NEW_KEY)) {
150 DEBUG(10, ("Key '%s' already exists.\n", subkeyname));
151 err = SBC_ERR_FILE_EXISTS;
152 }
153 if (!W_ERROR_IS_OK(werr)) {
154 DEBUG(5, ("Error creating key %s: %s\n",
155 subkeyname, win_errstr(werr)));
156 err = SBC_ERR_UNKNOWN_FAILURE;
157 }
158
159 talloc_free(create_ctx);
160 return err;
161}
162
163/**
164 * add a value to a key.
165 */
166static sbcErr smbconf_reg_set_value(struct registry_key *key,
167 const char *valname,
168 const char *valstr)
169{
170 struct registry_value val;
171 WERROR werr = WERR_OK;
172 sbcErr err;
173 char *subkeyname;
174 const char *canon_valname;
175 const char *canon_valstr;
176
177 if (!lp_canonicalize_parameter_with_value(valname, valstr,
178 &canon_valname,
179 &canon_valstr))
180 {
181 if (canon_valname == NULL) {
182 DEBUG(5, ("invalid parameter '%s' given\n",
183 valname));
184 } else {
185 DEBUG(5, ("invalid value '%s' given for "
186 "parameter '%s'\n", valstr, valname));
187 }
188 err = SBC_ERR_INVALID_PARAM;
189 goto done;
190 }
191
192 if (smbconf_reg_valname_forbidden(canon_valname)) {
193 DEBUG(5, ("Parameter '%s' not allowed in registry.\n",
194 canon_valname));
195 err = SBC_ERR_INVALID_PARAM;
196 goto done;
197 }
198
199 subkeyname = strrchr_m(key->key->name, '\\');
200 if ((subkeyname == NULL) || (*(subkeyname +1) == '\0')) {
201 DEBUG(5, ("Invalid registry key '%s' given as "
202 "smbconf section.\n", key->key->name));
203 err = SBC_ERR_INVALID_PARAM;
204 goto done;
205 }
206 subkeyname++;
207 if (!strequal(subkeyname, GLOBAL_NAME) &&
208 lp_parameter_is_global(valname))
209 {
210 DEBUG(5, ("Global parameter '%s' not allowed in "
211 "service definition ('%s').\n", canon_valname,
212 subkeyname));
213 err = SBC_ERR_INVALID_PARAM;
214 goto done;
215 }
216
217 ZERO_STRUCT(val);
218
219 val.type = REG_SZ;
220 if (!push_reg_sz(talloc_tos(), &val.data, canon_valstr)) {
221 err = SBC_ERR_NOMEM;
222 goto done;
223 }
224
225 werr = reg_setvalue(key, canon_valname, &val);
226 if (!W_ERROR_IS_OK(werr)) {
227 DEBUG(5, ("Error adding value '%s' to "
228 "key '%s': %s\n",
229 canon_valname, key->key->name, win_errstr(werr)));
230 err = SBC_ERR_NOMEM;
231 goto done;
232 }
233
234 err = SBC_ERR_OK;
235done:
236 return err;
237}
238
239static sbcErr smbconf_reg_set_multi_sz_value(struct registry_key *key,
240 const char *valname,
241 const uint32_t num_strings,
242 const char **strings)
243{
244 WERROR werr;
245 sbcErr err = SBC_ERR_OK;
246 struct registry_value *value;
247 uint32_t count;
248 TALLOC_CTX *tmp_ctx = talloc_stackframe();
249 const char **array;
250
251 if (strings == NULL) {
252 err = SBC_ERR_INVALID_PARAM;
253 goto done;
254 }
255
256 array = talloc_zero_array(tmp_ctx, const char *, num_strings + 1);
257 if (array == NULL) {
258 err = SBC_ERR_NOMEM;
259 goto done;
260 }
261
262 value = TALLOC_ZERO_P(tmp_ctx, struct registry_value);
263 if (value == NULL) {
264 err = SBC_ERR_NOMEM;
265 goto done;
266 }
267
268 value->type = REG_MULTI_SZ;
269
270 for (count = 0; count < num_strings; count++) {
271 array[count] = talloc_strdup(value, strings[count]);
272 if (array[count] == NULL) {
273 err = SBC_ERR_NOMEM;
274 goto done;
275 }
276 }
277
278 if (!push_reg_multi_sz(value, &value->data, array)) {
279 err = SBC_ERR_NOMEM;
280 goto done;
281 }
282
283 werr = reg_setvalue(key, valname, value);
284 if (!W_ERROR_IS_OK(werr)) {
285 DEBUG(5, ("Error adding value '%s' to key '%s': %s\n",
286 valname, key->key->name, win_errstr(werr)));
287 err = SBC_ERR_ACCESS_DENIED;
288 }
289
290done:
291 talloc_free(tmp_ctx);
292 return err;
293}
294
295/**
296 * format a registry_value into a string.
297 *
298 * This is intended to be used for smbconf registry values,
299 * which are ar stored as REG_SZ values, so the incomplete
300 * handling should be ok.
301 */
302static char *smbconf_format_registry_value(TALLOC_CTX *mem_ctx,
303 struct registry_value *value)
304{
305 char *result = NULL;
306
307 /* alternatively, create a new talloc context? */
308 if (mem_ctx == NULL) {
309 return result;
310 }
311
312 switch (value->type) {
313 case REG_DWORD:
314 if (value->data.length >= 4) {
315 uint32_t v = IVAL(value->data.data, 0);
316 result = talloc_asprintf(mem_ctx, "%d", v);
317 }
318 break;
319 case REG_SZ:
320 case REG_EXPAND_SZ: {
321 const char *s;
322 if (!pull_reg_sz(mem_ctx, &value->data, &s)) {
323 break;
324 }
325 result = talloc_strdup(mem_ctx, s);
326 break;
327 }
328 case REG_MULTI_SZ: {
329 uint32 j;
330 const char **a = NULL;
331 if (!pull_reg_multi_sz(mem_ctx, &value->data, &a)) {
332 break;
333 }
334 for (j = 0; a[j] != NULL; j++) {
335 result = talloc_asprintf(mem_ctx, "%s\"%s\" ",
336 result ? result : "" ,
337 a[j]);
338 if (result == NULL) {
339 break;
340 }
341 }
342 break;
343 }
344 case REG_BINARY:
345 result = talloc_asprintf(mem_ctx, "binary (%d bytes)",
346 (int)value->data.length);
347 break;
348 default:
349 result = talloc_asprintf(mem_ctx, "<unprintable>");
350 break;
351 }
352 return result;
353}
354
355static sbcErr smbconf_reg_get_includes_internal(TALLOC_CTX *mem_ctx,
356 struct registry_key *key,
357 uint32_t *num_includes,
358 char ***includes)
359{
360 WERROR werr;
361 sbcErr err;
362 uint32_t count;
363 struct registry_value *value = NULL;
364 char **tmp_includes = NULL;
365 const char **array = NULL;
366 TALLOC_CTX *tmp_ctx = talloc_stackframe();
367
368 if (!smbconf_value_exists(key, INCLUDES_VALNAME)) {
369 /* no includes */
370 *num_includes = 0;
371 *includes = NULL;
372 err = SBC_ERR_OK;
373 goto done;
374 }
375
376 werr = reg_queryvalue(tmp_ctx, key, INCLUDES_VALNAME, &value);
377 if (!W_ERROR_IS_OK(werr)) {
378 err = SBC_ERR_ACCESS_DENIED;
379 goto done;
380 }
381
382 if (value->type != REG_MULTI_SZ) {
383 /* wrong type -- ignore */
384 err = SBC_ERR_OK;
385 goto done;
386 }
387
388 if (!pull_reg_multi_sz(tmp_ctx, &value->data, &array)) {
389 err = SBC_ERR_NOMEM;
390 goto done;
391 }
392
393 for (count = 0; array[count] != NULL; count++) {
394 err = smbconf_add_string_to_array(tmp_ctx,
395 &tmp_includes,
396 count,
397 array[count]);
398 if (!SBC_ERROR_IS_OK(err)) {
399 goto done;
400 }
401 }
402
403 if (count > 0) {
404 *includes = talloc_move(mem_ctx, &tmp_includes);
405 if (*includes == NULL) {
406 err = SBC_ERR_NOMEM;
407 goto done;
408 }
409 *num_includes = count;
410 } else {
411 *num_includes = 0;
412 *includes = NULL;
413 }
414
415 err = SBC_ERR_OK;
416done:
417 talloc_free(tmp_ctx);
418 return err;
419}
420
421/**
422 * Get the values of a key as a list of value names
423 * and a list of value strings (ordered)
424 */
425static sbcErr smbconf_reg_get_values(TALLOC_CTX *mem_ctx,
426 struct registry_key *key,
427 uint32_t *num_values,
428 char ***value_names,
429 char ***value_strings)
430{
431 TALLOC_CTX *tmp_ctx = NULL;
432 WERROR werr = WERR_OK;
433 sbcErr err;
434 uint32_t count;
435 struct registry_value *valvalue = NULL;
436 char *valname = NULL;
437 uint32_t tmp_num_values = 0;
438 char **tmp_valnames = NULL;
439 char **tmp_valstrings = NULL;
440 uint32_t num_includes = 0;
441 char **includes = NULL;
442
443 if ((num_values == NULL) || (value_names == NULL) ||
444 (value_strings == NULL))
445 {
446 err = SBC_ERR_INVALID_PARAM;
447 goto done;
448 }
449
450 tmp_ctx = talloc_stackframe();
451
452 for (count = 0;
453 werr = reg_enumvalue(tmp_ctx, key, count, &valname, &valvalue),
454 W_ERROR_IS_OK(werr);
455 count++)
456 {
457 char *valstring;
458
459 if (!smbconf_reg_valname_valid(valname)) {
460 continue;
461 }
462
463 err = smbconf_add_string_to_array(tmp_ctx,
464 &tmp_valnames,
465 tmp_num_values, valname);
466 if (!SBC_ERROR_IS_OK(err)) {
467 goto done;
468 }
469
470 valstring = smbconf_format_registry_value(tmp_ctx, valvalue);
471 err = smbconf_add_string_to_array(tmp_ctx, &tmp_valstrings,
472 tmp_num_values, valstring);
473 if (!SBC_ERROR_IS_OK(err)) {
474 goto done;
475 }
476 tmp_num_values++;
477 }
478 if (!W_ERROR_EQUAL(WERR_NO_MORE_ITEMS, werr)) {
479 err = SBC_ERR_NOMEM;
480 goto done;
481 }
482
483 /* now add the includes at the end */
484 err = smbconf_reg_get_includes_internal(tmp_ctx, key, &num_includes,
485 &includes);
486 if (!SBC_ERROR_IS_OK(err)) {
487 goto done;
488 }
489
490 for (count = 0; count < num_includes; count++) {
491 err = smbconf_add_string_to_array(tmp_ctx, &tmp_valnames,
492 tmp_num_values, "include");
493 if (!SBC_ERROR_IS_OK(err)) {
494 goto done;
495 }
496
497 err = smbconf_add_string_to_array(tmp_ctx, &tmp_valstrings,
498 tmp_num_values,
499 includes[count]);
500 if (!SBC_ERROR_IS_OK(err)) {
501 goto done;
502 }
503
504 tmp_num_values++;
505 }
506
507 *num_values = tmp_num_values;
508 if (tmp_num_values > 0) {
509 *value_names = talloc_move(mem_ctx, &tmp_valnames);
510 *value_strings = talloc_move(mem_ctx, &tmp_valstrings);
511 } else {
512 *value_names = NULL;
513 *value_strings = NULL;
514 }
515
516done:
517 talloc_free(tmp_ctx);
518 return err;
519}
520
521static bool smbconf_reg_key_has_values(struct registry_key *key)
522{
523 WERROR werr;
524 uint32_t num_subkeys;
525 uint32_t max_subkeylen;
526 uint32_t max_subkeysize;
527 uint32_t num_values;
528 uint32_t max_valnamelen;
529 uint32_t max_valbufsize;
530 uint32_t secdescsize;
531 NTTIME last_changed_time;
532
533 werr = reg_queryinfokey(key, &num_subkeys, &max_subkeylen,
534 &max_subkeysize, &num_values, &max_valnamelen,
535 &max_valbufsize, &secdescsize,
536 &last_changed_time);
537 if (!W_ERROR_IS_OK(werr)) {
538 return false;
539 }
540
541 return (num_values != 0);
542}
543
544/**
545 * delete all values from a key
546 */
547static sbcErr smbconf_reg_delete_values(struct registry_key *key)
548{
549 WERROR werr;
550 sbcErr err;
551 char *valname;
552 struct registry_value *valvalue;
553 uint32_t count;
554 TALLOC_CTX *mem_ctx = talloc_stackframe();
555
556 for (count = 0;
557 werr = reg_enumvalue(mem_ctx, key, count, &valname, &valvalue),
558 W_ERROR_IS_OK(werr);
559 count++)
560 {
561 werr = reg_deletevalue(key, valname);
562 if (!W_ERROR_IS_OK(werr)) {
563 err = SBC_ERR_ACCESS_DENIED;
564 goto done;
565 }
566 }
567 if (!W_ERROR_EQUAL(WERR_NO_MORE_ITEMS, werr)) {
568 DEBUG(1, ("smbconf_reg_delete_values: "
569 "Error enumerating values of %s: %s\n",
570 key->key->name,
571 win_errstr(werr)));
572 err = SBC_ERR_ACCESS_DENIED;
573 goto done;
574 }
575
576 err = SBC_ERR_OK;
577
578done:
579 talloc_free(mem_ctx);
580 return err;
581}
582
583/**********************************************************************
584 *
585 * smbconf operations: registry implementations
586 *
587 **********************************************************************/
588
589/**
590 * initialize the registry smbconf backend
591 */
592static sbcErr smbconf_reg_init(struct smbconf_ctx *ctx, const char *path)
593{
594 WERROR werr = WERR_OK;
595 sbcErr err;
596 struct security_token *token;
597
598 if (path == NULL) {
599 path = KEY_SMBCONF;
600 }
601 ctx->path = talloc_strdup(ctx, path);
602 if (ctx->path == NULL) {
603 err = SBC_ERR_NOMEM;
604 goto done;
605 }
606
607 ctx->data = TALLOC_ZERO_P(ctx, struct reg_private_data);
608
609 werr = ntstatus_to_werror(registry_create_admin_token(ctx, &token));
610 if (!W_ERROR_IS_OK(werr)) {
611 DEBUG(1, ("Error creating admin token\n"));
612 err = SBC_ERR_UNKNOWN_FAILURE;
613 goto done;
614 }
615 rpd(ctx)->open = false;
616
617 werr = registry_init_smbconf(path);
618 if (!W_ERROR_IS_OK(werr)) {
619 err = SBC_ERR_BADFILE;
620 goto done;
621 }
622
623 err = ctx->ops->open_conf(ctx);
624 if (!SBC_ERROR_IS_OK(err)) {
625 DEBUG(1, ("Error opening the registry.\n"));
626 goto done;
627 }
628
629 werr = reg_open_path(ctx, ctx->path,
630 KEY_ENUMERATE_SUB_KEYS | REG_KEY_WRITE,
631 token, &rpd(ctx)->base_key);
632 if (!W_ERROR_IS_OK(werr)) {
633 err = SBC_ERR_UNKNOWN_FAILURE;
634 goto done;
635 }
636
637done:
638 return err;
639}
640
641static int smbconf_reg_shutdown(struct smbconf_ctx *ctx)
642{
643 return ctx->ops->close_conf(ctx);
644}
645
646static bool smbconf_reg_requires_messaging(struct smbconf_ctx *ctx)
647{
648#ifdef CLUSTER_SUPPORT
649 if (lp_clustering() && lp_parm_bool(-1, "ctdb", "registry.tdb", true)) {
650 return true;
651 }
652#endif
653 return false;
654}
655
656static bool smbconf_reg_is_writeable(struct smbconf_ctx *ctx)
657{
658 /*
659 * The backend has write support.
660 *
661 * TODO: add access checks whether the concrete
662 * config source is really writeable by the calling user.
663 */
664 return true;
665}
666
667static sbcErr smbconf_reg_open(struct smbconf_ctx *ctx)
668{
669 WERROR werr;
670
671 if (rpd(ctx)->open) {
672 return SBC_ERR_OK;
673 }
674
675 werr = regdb_open();
676 if (!W_ERROR_IS_OK(werr)) {
677 return SBC_ERR_BADFILE;
678 }
679
680 rpd(ctx)->open = true;
681 return SBC_ERR_OK;
682}
683
684static int smbconf_reg_close(struct smbconf_ctx *ctx)
685{
686 int ret;
687
688 if (!rpd(ctx)->open) {
689 return 0;
690 }
691
692 ret = regdb_close();
693 if (ret == 0) {
694 rpd(ctx)->open = false;
695 }
696 return ret;
697}
698
699/**
700 * Get the change sequence number of the given service/parameter.
701 * service and parameter strings may be NULL.
702 */
703static void smbconf_reg_get_csn(struct smbconf_ctx *ctx,
704 struct smbconf_csn *csn,
705 const char *service, const char *param)
706{
707 if (csn == NULL) {
708 return;
709 }
710
711 if (!SBC_ERROR_IS_OK(ctx->ops->open_conf(ctx))) {
712 return;
713 }
714
715 csn->csn = (uint64_t)regdb_get_seqnum();
716}
717
718/**
719 * Drop the whole configuration (restarting empty) - registry version
720 */
721static sbcErr smbconf_reg_drop(struct smbconf_ctx *ctx)
722{
723 char *path, *p;
724 WERROR werr = WERR_OK;
725 sbcErr err = SBC_ERR_OK;
726 struct registry_key *parent_key = NULL;
727 struct registry_key *new_key = NULL;
728 TALLOC_CTX* mem_ctx = talloc_stackframe();
729 enum winreg_CreateAction action;
730 struct security_token *token;
731
732 werr = ntstatus_to_werror(registry_create_admin_token(ctx, &token));
733 if (!W_ERROR_IS_OK(werr)) {
734 DEBUG(1, ("Error creating admin token\n"));
735 err = SBC_ERR_UNKNOWN_FAILURE;
736 goto done;
737 }
738
739 path = talloc_strdup(mem_ctx, ctx->path);
740 if (path == NULL) {
741 err = SBC_ERR_NOMEM;
742 goto done;
743 }
744 p = strrchr(path, '\\');
745 if (p == NULL) {
746 err = SBC_ERR_INVALID_PARAM;
747 goto done;
748 }
749 *p = '\0';
750 werr = reg_open_path(mem_ctx, path, REG_KEY_WRITE, token,
751 &parent_key);
752 if (!W_ERROR_IS_OK(werr)) {
753 err = SBC_ERR_IO_FAILURE;
754 goto done;
755 }
756
757 werr = reg_deletekey_recursive(parent_key, p+1);
758 if (!W_ERROR_IS_OK(werr)) {
759 err = SBC_ERR_IO_FAILURE;
760 goto done;
761 }
762
763 werr = reg_createkey(mem_ctx, parent_key, p+1, REG_KEY_WRITE,
764 &new_key, &action);
765 if (!W_ERROR_IS_OK(werr)) {
766 err = SBC_ERR_IO_FAILURE;
767 goto done;
768 }
769
770done:
771 talloc_free(mem_ctx);
772 return err;
773}
774
775/**
776 * get the list of share names defined in the configuration.
777 * registry version.
778 */
779static sbcErr smbconf_reg_get_share_names(struct smbconf_ctx *ctx,
780 TALLOC_CTX *mem_ctx,
781 uint32_t *num_shares,
782 char ***share_names)
783{
784 uint32_t count;
785 uint32_t added_count = 0;
786 TALLOC_CTX *tmp_ctx = NULL;
787 WERROR werr;
788 sbcErr err = SBC_ERR_OK;
789 char *subkey_name = NULL;
790 char **tmp_share_names = NULL;
791
792 if ((num_shares == NULL) || (share_names == NULL)) {
793 return SBC_ERR_INVALID_PARAM;
794 }
795
796 tmp_ctx = talloc_stackframe();
797
798 /* if there are values in the base key, return NULL as share name */
799
800 if (smbconf_reg_key_has_values(rpd(ctx)->base_key)) {
801 err = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
802 0, NULL);
803 if (!SBC_ERROR_IS_OK(err)) {
804 goto done;
805 }
806 added_count++;
807 }
808
809 /* make sure "global" is always listed first */
810 if (smbconf_share_exists(ctx, GLOBAL_NAME)) {
811 err = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
812 added_count, GLOBAL_NAME);
813 if (!SBC_ERROR_IS_OK(err)) {
814 goto done;
815 }
816 added_count++;
817 }
818
819 for (count = 0;
820 werr = reg_enumkey(tmp_ctx, rpd(ctx)->base_key, count,
821 &subkey_name, NULL),
822 W_ERROR_IS_OK(werr);
823 count++)
824 {
825 if (strequal(subkey_name, GLOBAL_NAME)) {
826 continue;
827 }
828
829 err = smbconf_add_string_to_array(tmp_ctx,
830 &tmp_share_names,
831 added_count,
832 subkey_name);
833 if (!SBC_ERROR_IS_OK(err)) {
834 goto done;
835 }
836 added_count++;
837 }
838 if (!W_ERROR_EQUAL(WERR_NO_MORE_ITEMS, werr)) {
839 err = SBC_ERR_NO_MORE_ITEMS;
840 goto done;
841 }
842 err = SBC_ERR_OK;
843
844 *num_shares = added_count;
845 if (added_count > 0) {
846 *share_names = talloc_move(mem_ctx, &tmp_share_names);
847 } else {
848 *share_names = NULL;
849 }
850
851done:
852 talloc_free(tmp_ctx);
853 return err;
854}
855
856/**
857 * check if a share/service of a given name exists - registry version
858 */
859static bool smbconf_reg_share_exists(struct smbconf_ctx *ctx,
860 const char *servicename)
861{
862 bool ret = false;
863 sbcErr err;
864 TALLOC_CTX *mem_ctx = talloc_stackframe();
865 struct registry_key *key = NULL;
866
867 err = smbconf_reg_open_service_key(mem_ctx, ctx, servicename,
868 REG_KEY_READ, &key);
869 if (SBC_ERROR_IS_OK(err)) {
870 ret = true;
871 }
872
873 talloc_free(mem_ctx);
874 return ret;
875}
876
877/**
878 * Add a service if it does not already exist - registry version
879 */
880static sbcErr smbconf_reg_create_share(struct smbconf_ctx *ctx,
881 const char *servicename)
882{
883 sbcErr err;
884 struct registry_key *key = NULL;
885
886 if (servicename == NULL) {
887 return SBC_ERR_OK;
888 }
889
890 err = smbconf_reg_create_service_key(talloc_tos(), ctx,
891 servicename, &key);
892
893 talloc_free(key);
894 return err;
895}
896
897/**
898 * get a definition of a share (service) from configuration.
899 */
900static sbcErr smbconf_reg_get_share(struct smbconf_ctx *ctx,
901 TALLOC_CTX *mem_ctx,
902 const char *servicename,
903 struct smbconf_service **service)
904{
905 sbcErr err;
906 struct registry_key *key = NULL;
907 struct smbconf_service *tmp_service = NULL;
908 TALLOC_CTX *tmp_ctx = talloc_stackframe();
909
910 err = smbconf_reg_open_service_key(tmp_ctx, ctx, servicename,
911 REG_KEY_READ, &key);
912 if (!SBC_ERROR_IS_OK(err)) {
913 goto done;
914 }
915
916 tmp_service = TALLOC_ZERO_P(tmp_ctx, struct smbconf_service);
917 if (tmp_service == NULL) {
918 err = SBC_ERR_NOMEM;
919 goto done;
920 }
921
922 if (servicename != NULL) {
923 tmp_service->name = talloc_strdup(tmp_service, servicename);
924 if (tmp_service->name == NULL) {
925 err = SBC_ERR_NOMEM;
926 goto done;
927 }
928 }
929
930 err = smbconf_reg_get_values(tmp_service, key,
931 &(tmp_service->num_params),
932 &(tmp_service->param_names),
933 &(tmp_service->param_values));
934 if (SBC_ERROR_IS_OK(err)) {
935 *service = talloc_move(mem_ctx, &tmp_service);
936 }
937
938done:
939 talloc_free(tmp_ctx);
940 return err;
941}
942
943/**
944 * delete a service from configuration
945 */
946static sbcErr smbconf_reg_delete_share(struct smbconf_ctx *ctx,
947 const char *servicename)
948{
949 WERROR werr;
950 sbcErr err = SBC_ERR_OK;
951 TALLOC_CTX *mem_ctx = talloc_stackframe();
952
953 if (servicename != NULL) {
954 werr = reg_deletekey_recursive(rpd(ctx)->base_key, servicename);
955 if (!W_ERROR_IS_OK(werr)) {
956 err = SBC_ERR_ACCESS_DENIED;
957 }
958 } else {
959 err = smbconf_reg_delete_values(rpd(ctx)->base_key);
960 }
961
962 talloc_free(mem_ctx);
963 return err;
964}
965
966/**
967 * set a configuration parameter to the value provided.
968 */
969static sbcErr smbconf_reg_set_parameter(struct smbconf_ctx *ctx,
970 const char *service,
971 const char *param,
972 const char *valstr)
973{
974 sbcErr err;
975 struct registry_key *key = NULL;
976 TALLOC_CTX *mem_ctx = talloc_stackframe();
977
978 err = smbconf_reg_open_service_key(mem_ctx, ctx, service,
979 REG_KEY_WRITE, &key);
980 if (!SBC_ERROR_IS_OK(err)) {
981 goto done;
982 }
983
984 err = smbconf_reg_set_value(key, param, valstr);
985
986done:
987 talloc_free(mem_ctx);
988 return err;
989}
990
991/**
992 * get the value of a configuration parameter as a string
993 */
994static sbcErr smbconf_reg_get_parameter(struct smbconf_ctx *ctx,
995 TALLOC_CTX *mem_ctx,
996 const char *service,
997 const char *param,
998 char **valstr)
999{
1000 WERROR werr = WERR_OK;
1001 sbcErr err;
1002 struct registry_key *key = NULL;
1003 struct registry_value *value = NULL;
1004
1005 err = smbconf_reg_open_service_key(mem_ctx, ctx, service,
1006 REG_KEY_READ, &key);
1007 if (!SBC_ERROR_IS_OK(err)) {
1008 goto done;
1009 }
1010
1011 if (!smbconf_reg_valname_valid(param)) {
1012 err = SBC_ERR_INVALID_PARAM;
1013 goto done;
1014 }
1015
1016 if (!smbconf_value_exists(key, param)) {
1017 err = SBC_ERR_INVALID_PARAM;
1018 goto done;
1019 }
1020
1021 werr = reg_queryvalue(mem_ctx, key, param, &value);
1022 if (!W_ERROR_IS_OK(werr)) {
1023 err = SBC_ERR_NOMEM;
1024 goto done;
1025 }
1026
1027 *valstr = smbconf_format_registry_value(mem_ctx, value);
1028 if (*valstr == NULL) {
1029 err = SBC_ERR_NOMEM;
1030 }
1031
1032done:
1033 talloc_free(key);
1034 talloc_free(value);
1035 return err;
1036}
1037
1038/**
1039 * delete a parameter from configuration
1040 */
1041static sbcErr smbconf_reg_delete_parameter(struct smbconf_ctx *ctx,
1042 const char *service,
1043 const char *param)
1044{
1045 struct registry_key *key = NULL;
1046 WERROR werr;
1047 sbcErr err;
1048 TALLOC_CTX *mem_ctx = talloc_stackframe();
1049
1050 err = smbconf_reg_open_service_key(mem_ctx, ctx, service,
1051 REG_KEY_ALL, &key);
1052 if (!SBC_ERROR_IS_OK(err)) {
1053 goto done;
1054 }
1055
1056 if (!smbconf_reg_valname_valid(param)) {
1057 err = SBC_ERR_INVALID_PARAM;
1058 goto done;
1059 }
1060
1061 if (!smbconf_value_exists(key, param)) {
1062 err = SBC_ERR_OK;
1063 goto done;
1064 }
1065
1066 werr = reg_deletevalue(key, param);
1067 if (!W_ERROR_IS_OK(werr)) {
1068 err = SBC_ERR_ACCESS_DENIED;
1069 }
1070
1071done:
1072 talloc_free(mem_ctx);
1073 return err;
1074}
1075
1076static sbcErr smbconf_reg_get_includes(struct smbconf_ctx *ctx,
1077 TALLOC_CTX *mem_ctx,
1078 const char *service,
1079 uint32_t *num_includes,
1080 char ***includes)
1081{
1082 sbcErr err;
1083 struct registry_key *key = NULL;
1084 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1085
1086 err = smbconf_reg_open_service_key(tmp_ctx, ctx, service,
1087 REG_KEY_READ, &key);
1088 if (!SBC_ERROR_IS_OK(err)) {
1089 goto done;
1090 }
1091
1092 err = smbconf_reg_get_includes_internal(mem_ctx, key, num_includes,
1093 includes);
1094 if (!SBC_ERROR_IS_OK(err)) {
1095 goto done;
1096 }
1097
1098done:
1099 talloc_free(tmp_ctx);
1100 return err;
1101}
1102
1103static sbcErr smbconf_reg_set_includes(struct smbconf_ctx *ctx,
1104 const char *service,
1105 uint32_t num_includes,
1106 const char **includes)
1107{
1108 WERROR werr = WERR_OK;
1109 sbcErr err;
1110 struct registry_key *key = NULL;
1111 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1112
1113 err = smbconf_reg_open_service_key(tmp_ctx, ctx, service,
1114 REG_KEY_ALL, &key);
1115 if (!SBC_ERROR_IS_OK(err)) {
1116 goto done;
1117 }
1118
1119 if (num_includes == 0) {
1120 if (!smbconf_value_exists(key, INCLUDES_VALNAME)) {
1121 err = SBC_ERR_OK;
1122 goto done;
1123 }
1124 werr = reg_deletevalue(key, INCLUDES_VALNAME);
1125 if (!W_ERROR_IS_OK(werr)) {
1126 err = SBC_ERR_ACCESS_DENIED;
1127 goto done;
1128 }
1129 } else {
1130 err = smbconf_reg_set_multi_sz_value(key, INCLUDES_VALNAME,
1131 num_includes, includes);
1132 }
1133
1134done:
1135 talloc_free(tmp_ctx);
1136 return err;
1137}
1138
1139static sbcErr smbconf_reg_delete_includes(struct smbconf_ctx *ctx,
1140 const char *service)
1141{
1142 WERROR werr;
1143 sbcErr err;
1144 struct registry_key *key = NULL;
1145 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1146
1147 err = smbconf_reg_open_service_key(tmp_ctx, ctx, service,
1148 REG_KEY_ALL, &key);
1149 if (!SBC_ERROR_IS_OK(err)) {
1150 goto done;
1151 }
1152
1153 if (!smbconf_value_exists(key, INCLUDES_VALNAME)) {
1154 err = SBC_ERR_OK;
1155 goto done;
1156 }
1157
1158 werr = reg_deletevalue(key, INCLUDES_VALNAME);
1159 if (!W_ERROR_IS_OK(werr)) {
1160 err = SBC_ERR_ACCESS_DENIED;
1161 goto done;
1162 }
1163
1164 err = SBC_ERR_OK;
1165done:
1166 talloc_free(tmp_ctx);
1167 return err;
1168}
1169
1170static sbcErr smbconf_reg_transaction_start(struct smbconf_ctx *ctx)
1171{
1172 WERROR werr;
1173
1174 werr = regdb_transaction_start();
1175 if (!W_ERROR_IS_OK(werr)) {
1176 return SBC_ERR_IO_FAILURE;
1177 }
1178
1179 return SBC_ERR_OK;
1180}
1181
1182static sbcErr smbconf_reg_transaction_commit(struct smbconf_ctx *ctx)
1183{
1184 WERROR werr;
1185
1186 werr = regdb_transaction_commit();
1187 if (!W_ERROR_IS_OK(werr)) {
1188 return SBC_ERR_IO_FAILURE;
1189 }
1190
1191 return SBC_ERR_OK;
1192}
1193
1194static sbcErr smbconf_reg_transaction_cancel(struct smbconf_ctx *ctx)
1195{
1196 WERROR werr;
1197
1198 werr = regdb_transaction_cancel();
1199 if (!W_ERROR_IS_OK(werr)) {
1200 return SBC_ERR_IO_FAILURE;
1201 }
1202
1203 return SBC_ERR_OK;
1204}
1205
1206struct smbconf_ops smbconf_ops_reg = {
1207 .init = smbconf_reg_init,
1208 .shutdown = smbconf_reg_shutdown,
1209 .requires_messaging = smbconf_reg_requires_messaging,
1210 .is_writeable = smbconf_reg_is_writeable,
1211 .open_conf = smbconf_reg_open,
1212 .close_conf = smbconf_reg_close,
1213 .get_csn = smbconf_reg_get_csn,
1214 .drop = smbconf_reg_drop,
1215 .get_share_names = smbconf_reg_get_share_names,
1216 .share_exists = smbconf_reg_share_exists,
1217 .create_share = smbconf_reg_create_share,
1218 .get_share = smbconf_reg_get_share,
1219 .delete_share = smbconf_reg_delete_share,
1220 .set_parameter = smbconf_reg_set_parameter,
1221 .get_parameter = smbconf_reg_get_parameter,
1222 .delete_parameter = smbconf_reg_delete_parameter,
1223 .get_includes = smbconf_reg_get_includes,
1224 .set_includes = smbconf_reg_set_includes,
1225 .delete_includes = smbconf_reg_delete_includes,
1226 .transaction_start = smbconf_reg_transaction_start,
1227 .transaction_commit = smbconf_reg_transaction_commit,
1228 .transaction_cancel = smbconf_reg_transaction_cancel,
1229};
1230
1231
1232/**
1233 * initialize the smbconf registry backend
1234 * the only function that is exported from this module
1235 */
1236sbcErr smbconf_init_reg(TALLOC_CTX *mem_ctx, struct smbconf_ctx **conf_ctx,
1237 const char *path)
1238{
1239 return smbconf_init_internal(mem_ctx, conf_ctx, path, &smbconf_ops_reg);
1240}
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