716207dbaab754bc4029a4595f89f3f1426d5a46
[samba.git] / source3 / registry / reg_backend_db.c
1 /* 
2  *  Unix SMB/CIFS implementation.
3  *  Virtual Windows Registry Layer
4  *  Copyright (C) Gerald Carter                     2002-2005
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 /* Implementation of internal registry database functions. */
21
22 #include "includes.h"
23
24 #undef DBGC_CLASS
25 #define DBGC_CLASS DBGC_REGISTRY
26
27 static struct db_context *regdb = NULL;
28 static int regdb_refcount;
29
30 /* List the deepest path into the registry.  All part components will be created.*/
31
32 /* If you want to have a part of the path controlled by the tdb and part by
33    a virtual registry db (e.g. printing), then you have to list the deepest path.
34    For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print" 
35    allows the reg_db backend to handle everything up to 
36    "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook 
37    the reg_printing backend onto the last component of the path (see 
38    KEY_PRINTING_2K in include/rpc_reg.h)   --jerry */
39
40 static const char *builtin_registry_paths[] = {
41         KEY_PRINTING_2K,
42         KEY_PRINTING_PORTS,
43         KEY_PRINTING,
44         KEY_SHARES,
45         KEY_EVENTLOG,
46         KEY_SMBCONF,
47         KEY_PERFLIB,
48         KEY_PERFLIB_009,
49         KEY_GROUP_POLICY,
50         KEY_SAMBA_GROUP_POLICY,
51         KEY_GP_MACHINE_POLICY,
52         KEY_GP_MACHINE_WIN_POLICY,
53         KEY_HKCU,
54         KEY_GP_USER_POLICY,
55         KEY_GP_USER_WIN_POLICY,
56         KEY_WINLOGON_GPEXT_PATH,
57         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
58         KEY_PROD_OPTIONS,
59         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
60         KEY_TCPIP_PARAMS,
61         KEY_NETLOGON_PARAMS,
62         KEY_HKU,
63         KEY_HKCR,
64         KEY_HKPD,
65         KEY_HKPT,
66          NULL };
67
68 struct builtin_regkey_value {
69         const char *path;
70         const char *valuename;
71         uint32 type;
72         union {
73                 const char *string;
74                 uint32 dw_value;
75         } data;
76 };
77
78 static struct builtin_regkey_value builtin_registry_values[] = {
79         { KEY_PRINTING_PORTS,
80                 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
81         { KEY_PRINTING_2K,
82                 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
83         { KEY_EVENTLOG,
84                 "DisplayName", REG_SZ, { "Event Log" } }, 
85         { KEY_EVENTLOG,
86                 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
87         { NULL, NULL, 0, { NULL } }
88 };
89
90 /**
91  * Initialize a key in the registry:
92  * create each component key of the specified path.
93  */
94 static bool init_registry_key_internal(const char *add_path)
95 {
96         bool ret = false;
97         TALLOC_CTX *frame = talloc_stackframe();
98         char *path = NULL;
99         char *base = NULL;
100         char *remaining = NULL;
101         char *keyname;
102         char *subkeyname;
103         REGSUBKEY_CTR *subkeys;
104         const char *p, *p2;
105
106         DEBUG(6, ("init_registry_key: Adding [%s]\n", add_path));
107
108         path = talloc_strdup(frame, add_path);
109         base = talloc_strdup(frame, "");
110         if (!path || !base) {
111                 goto fail;
112         }
113         p = path;
114
115         while (next_token_talloc(frame, &p, &keyname, "\\")) {
116
117                 /* build up the registry path from the components */
118
119                 if (*base) {
120                         base = talloc_asprintf(frame, "%s\\", base);
121                         if (!base) {
122                                 goto fail;
123                         }
124                 }
125                 base = talloc_asprintf_append(base, "%s", keyname);
126                 if (!base) {
127                         goto fail;
128                 }
129
130                 /* get the immediate subkeyname (if we have one ) */
131
132                 subkeyname = talloc_strdup(frame, "");
133                 if (!subkeyname) {
134                         goto fail;
135                 }
136                 if (*p) {
137                         remaining = talloc_strdup(frame, p);
138                         if (!remaining) {
139                                 goto fail;
140                         }
141                         p2 = remaining;
142
143                         if (!next_token_talloc(frame, &p2,
144                                                 &subkeyname, "\\"))
145                         {
146                                 subkeyname = talloc_strdup(frame,p2);
147                                 if (!subkeyname) {
148                                         goto fail;
149                                 }
150                         }
151                 }
152
153                 DEBUG(10,("init_registry_key: Storing key [%s] with "
154                           "subkey [%s]\n", base,
155                           *subkeyname ? subkeyname : "NULL"));
156
157                 /* we don't really care if the lookup succeeds or not
158                  * since we are about to update the record.
159                  * We just want any subkeys already present */
160
161                 if (!(subkeys = TALLOC_ZERO_P(frame, REGSUBKEY_CTR))) {
162                         DEBUG(0,("talloc() failure!\n"));
163                         goto fail;
164                 }
165
166                 regdb_fetch_keys(base, subkeys);
167                 if (*subkeyname) {
168                         regsubkey_ctr_addkey( subkeys, subkeyname);
169                 }
170                 if (!regdb_store_keys( base, subkeys)) {
171                         goto fail;
172                 }
173         }
174
175         ret = true;
176 fail:
177         TALLOC_FREE(frame);
178         return ret;
179 }
180
181 /**
182  * Initialize a key in the registry:
183  * create each component key of the specified path,
184  * wrapped in one db transaction.
185  */
186 bool init_registry_key(const char *add_path)
187 {
188         if (regdb->transaction_start(regdb) != 0) {
189                 DEBUG(0, ("init_registry_key: transaction_start failed\n"));
190                 return false;
191         }
192
193         if (!init_registry_key_internal(add_path)) {
194                 goto fail;
195         }
196
197         if (regdb->transaction_commit(regdb) != 0) {
198                 DEBUG(0, ("init_registry_key: Could not commit transaction\n"));
199                 return false;
200         }
201
202         return true;
203
204 fail:
205         if (regdb->transaction_cancel(regdb) != 0) {
206                 smb_panic("init_registry_key: transaction_cancel failed\n");
207         }
208
209         return false;
210 }
211
212 /***********************************************************************
213  Open the registry data in the tdb
214  ***********************************************************************/
215
216 bool init_registry_data(void)
217 {
218         TALLOC_CTX *frame = NULL;
219         REGVAL_CTR *values;
220         int i;
221         UNISTR2 data;
222
223         /*
224          * There are potentially quite a few store operations which are all
225          * indiviually wrapped in tdb transactions. Wrapping them in a single
226          * transaction gives just a single transaction_commit() to actually do
227          * its fsync()s. See tdb/common/transaction.c for info about nested
228          * transaction behaviour.
229          */
230
231         if (regdb->transaction_start(regdb) != 0) {
232                 DEBUG(0, ("init_registry_data: tdb_transaction_start "
233                           "failed\n"));
234                 return false;
235         }
236
237         /* loop over all of the predefined paths and add each component */
238
239         for (i=0; builtin_registry_paths[i] != NULL; i++) {
240                 if (!init_registry_key_internal(builtin_registry_paths[i])) {
241                         goto fail;
242                 }
243         }
244
245         /* loop over all of the predefined values and add each component */
246
247         frame = talloc_stackframe();
248
249         for (i=0; builtin_registry_values[i].path != NULL; i++) {
250
251                 values = TALLOC_ZERO_P(frame, REGVAL_CTR);
252                 if (values == NULL) {
253                         goto fail;
254                 }
255
256                 regdb_fetch_values(builtin_registry_values[i].path, values);
257
258                 /* preserve existing values across restarts. Only add new ones */
259
260                 if (!regval_ctr_key_exists(values,
261                                         builtin_registry_values[i].valuename))
262                 {
263                         switch(builtin_registry_values[i].type) {
264                         case REG_DWORD:
265                                 regval_ctr_addvalue(values,
266                                         builtin_registry_values[i].valuename,
267                                         REG_DWORD,
268                                         (char*)&builtin_registry_values[i].data.dw_value,
269                                         sizeof(uint32));
270                                 break;
271
272                         case REG_SZ:
273                                 init_unistr2(&data,
274                                         builtin_registry_values[i].data.string,
275                                         UNI_STR_TERMINATE);
276                                 regval_ctr_addvalue(values,
277                                         builtin_registry_values[i].valuename,
278                                         REG_SZ,
279                                         (char*)data.buffer,
280                                         data.uni_str_len*sizeof(uint16));
281                                 break;
282
283                         default:
284                                 DEBUG(0, ("init_registry_data: invalid value "
285                                           "type in builtin_registry_values "
286                                           "[%d]\n",
287                                           builtin_registry_values[i].type));
288                         }
289                         regdb_store_values(builtin_registry_values[i].path,
290                                            values);
291                 }
292                 TALLOC_FREE(values);
293         }
294
295         TALLOC_FREE(frame);
296
297         if (regdb->transaction_commit(regdb) != 0) {
298                 DEBUG(0, ("init_registry_data: Could not commit "
299                           "transaction\n"));
300                 return false;
301         }
302
303         return true;
304
305  fail:
306
307         TALLOC_FREE(frame);
308
309         if (regdb->transaction_cancel(regdb) != 0) {
310                 smb_panic("init_registry_data: tdb_transaction_cancel "
311                           "failed\n");
312         }
313
314         return false;
315 }
316
317 /***********************************************************************
318  Open the registry database
319  ***********************************************************************/
320  
321 bool regdb_init(void)
322 {
323         const char *vstring = "INFO/version";
324         uint32 vers_id;
325
326         if (regdb) {
327                 DEBUG(10, ("regdb_init: incrementing refcount (%d)\n",
328                           regdb_refcount));
329                 regdb_refcount++;
330                 return true;
331         }
332
333         regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
334                               REG_TDB_FLAGS, O_RDWR, 0600);
335         if (!regdb) {
336                 regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
337                                       REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
338                 if (!regdb) {
339                         DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
340                                 state_path("registry.tdb"), strerror(errno) ));
341                         return false;
342                 }
343                 
344                 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
345         }
346
347         regdb_refcount = 1;
348
349         vers_id = dbwrap_fetch_int32(regdb, vstring);
350
351         if ( vers_id != REGVER_V1 ) {
352                 /* any upgrade code here if needed */
353                 DEBUG(10, ("regdb_init: got %s = %d != %d\n", vstring,
354                            vers_id, REGVER_V1));
355                 if (dbwrap_trans_store_int32(regdb, vstring, REGVER_V1) != 0) {
356                         DEBUG(0, ("regdb_init: error storing %s = %d\n",
357                                   vstring, REGVER_V1));
358                         return false;
359                 } else {
360                         DEBUG(10, ("regdb_init: stored %s = %d\n",
361                                   vstring, REGVER_V1));
362                 }
363         }
364
365         return true;
366 }
367
368 /***********************************************************************
369  Open the registry.  Must already have been initialized by regdb_init()
370  ***********************************************************************/
371
372 WERROR regdb_open( void )
373 {
374         WERROR result = WERR_OK;
375
376         if ( regdb ) {
377                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", regdb_refcount));
378                 regdb_refcount++;
379                 return WERR_OK;
380         }
381         
382         become_root();
383
384         regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
385                               REG_TDB_FLAGS, O_RDWR, 0600);
386         if ( !regdb ) {
387                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
388                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n", 
389                         state_path("registry.tdb"), strerror(errno) ));
390         }
391
392         unbecome_root();
393
394         regdb_refcount = 1;
395         DEBUG(10,("regdb_open: refcount reset (%d)\n", regdb_refcount));
396
397         return result;
398 }
399
400 /***********************************************************************
401  ***********************************************************************/
402
403 int regdb_close( void )
404 {
405         if (regdb_refcount == 0) {
406                 return 0;
407         }
408
409         regdb_refcount--;
410
411         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", regdb_refcount));
412
413         if ( regdb_refcount > 0 )
414                 return 0;
415
416         SMB_ASSERT( regdb_refcount >= 0 );
417
418         TALLOC_FREE(regdb);
419         return 0;
420 }
421
422 /***********************************************************************
423  return the tdb sequence number of the registry tdb.
424  this is an indicator for the content of the registry
425  having changed. it will change upon regdb_init, too, though.
426  ***********************************************************************/
427 int regdb_get_seqnum(void)
428 {
429         return regdb->get_seqnum(regdb);
430 }
431
432 /***********************************************************************
433  Add subkey strings to the registry tdb under a defined key
434  fmt is the same format as tdb_pack except this function only supports
435  fstrings
436  ***********************************************************************/
437
438 static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
439 {
440         TDB_DATA dbuf;
441         uint8 *buffer = NULL;
442         int i = 0;
443         uint32 len, buflen;
444         bool ret = true;
445         uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
446         char *keyname = NULL;
447         TALLOC_CTX *ctx = talloc_stackframe();
448         NTSTATUS status;
449
450         if (!key) {
451                 return false;
452         }
453
454         keyname = talloc_strdup(ctx, key);
455         if (!keyname) {
456                 return false;
457         }
458         keyname = normalize_reg_path(ctx, keyname);
459
460         /* allocate some initial memory */
461
462         buffer = (uint8 *)SMB_MALLOC(1024);
463         if (buffer == NULL) {
464                 return false;
465         }
466         buflen = 1024;
467         len = 0;
468
469         /* store the number of subkeys */
470
471         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
472
473         /* pack all the strings */
474
475         for (i=0; i<num_subkeys; i++) {
476                 len += tdb_pack(buffer+len, buflen-len, "f",
477                                 regsubkey_ctr_specific_key(ctr, i));
478                 if (len > buflen) {
479                         /* allocate some extra space */
480                         buffer = (uint8 *)SMB_REALLOC(buffer, len*2);
481                         if(buffer == NULL) {
482                                 DEBUG(0, ("regdb_store_keys: Failed to realloc "
483                                           "memory of size [%d]\n", len*2));
484                                 ret = false;
485                                 goto done;
486                         }
487                         buflen = len*2;
488                         len = tdb_pack(buffer+len, buflen-len, "f",
489                                        regsubkey_ctr_specific_key(ctr, i));
490                 }
491         }
492
493         /* finally write out the data */
494
495         dbuf.dptr = buffer;
496         dbuf.dsize = len;
497         status = dbwrap_store_bystring(regdb, keyname, dbuf, TDB_REPLACE);
498         if (!NT_STATUS_IS_OK(status)) {
499                 ret = false;
500                 goto done;
501         }
502
503 done:
504         TALLOC_FREE(ctx);
505         SAFE_FREE(buffer);
506         return ret;
507 }
508
509 /***********************************************************************
510  Store the new subkey record and create any child key records that
511  do not currently exist
512  ***********************************************************************/
513
514 bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
515 {
516         int num_subkeys, i;
517         char *path = NULL;
518         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
519         char *oldkeyname = NULL;
520         TALLOC_CTX *ctx = talloc_stackframe();
521         NTSTATUS status;
522
523         /*
524          * fetch a list of the old subkeys so we can determine if anything has
525          * changed
526          */
527
528         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
529                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
530                 return false;
531         }
532
533         regdb_fetch_keys(key, old_subkeys);
534
535         if ((ctr->num_subkeys && old_subkeys->num_subkeys) &&
536             (ctr->num_subkeys == old_subkeys->num_subkeys)) {
537
538                 for (i = 0; i<ctr->num_subkeys; i++) {
539                         if (strcmp(ctr->subkeys[i],
540                                    old_subkeys->subkeys[i]) != 0) {
541                                 break;
542                         }
543                 }
544                 if (i == ctr->num_subkeys) {
545                         /*
546                          * Nothing changed, no point to even start a tdb
547                          * transaction
548                          */
549                         TALLOC_FREE(old_subkeys);
550                         return true;
551                 }
552         }
553
554         TALLOC_FREE(old_subkeys);
555
556         if (regdb->transaction_start(regdb) != 0) {
557                 DEBUG(0, ("regdb_store_keys: transaction_start failed\n"));
558                 goto fail;
559         }
560
561         /*
562          * Re-fetch the old keys inside the transaction
563          */
564
565         if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
566                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
567                 goto cancel;
568         }
569
570         regdb_fetch_keys(key, old_subkeys);
571
572         /* store the subkey list for the parent */
573
574         if (!regdb_store_keys_internal(key, ctr) ) {
575                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
576                          "for parent [%s]\n", key));
577                 goto cancel;
578         }
579
580         /* now delete removed keys */
581
582         num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
583         for (i=0; i<num_subkeys; i++) {
584                 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
585
586                 if (regsubkey_ctr_key_exists(ctr, oldkeyname)) {
587                         /*
588                          * It's still around, don't delete
589                          */
590
591                         continue;
592                 }
593
594                 path = talloc_asprintf(ctx, "%s/%s", key, oldkeyname);
595                 if (!path) {
596                         goto cancel;
597                 }
598                 path = normalize_reg_path(ctx, path);
599                 if (!path) {
600                         goto cancel;
601                 }
602                 status = dbwrap_delete_bystring(regdb, path);
603                 if (!NT_STATUS_IS_OK(status)) {
604                         DEBUG(1, ("Deleting %s failed\n", path));
605                         goto cancel;
606                 }
607
608                 TALLOC_FREE(path);
609                 path = talloc_asprintf(ctx, "%s/%s/%s",
610                                 REG_VALUE_PREFIX,
611                                 key,
612                                 oldkeyname );
613                 if (!path) {
614                         goto cancel;
615                 }
616                 path = normalize_reg_path(ctx, path);
617                 if (!path) {
618                         goto cancel;
619                 }
620
621                 /*
622                  * Ignore errors here, we might have no values around
623                  */
624                 dbwrap_delete_bystring(regdb, path);
625                 TALLOC_FREE(path);
626         }
627
628         TALLOC_FREE(old_subkeys);
629
630         /* now create records for any subkeys that don't already exist */
631
632         num_subkeys = regsubkey_ctr_numkeys(ctr);
633
634         if (num_subkeys == 0) {
635                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
636                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
637                         goto cancel;
638                 }
639
640                 if (!regdb_store_keys_internal(key, subkeys)) {
641                         DEBUG(0,("regdb_store_keys: Failed to store "
642                                  "new record for key [%s]\n", key));
643                         goto cancel;
644                 }
645                 TALLOC_FREE(subkeys);
646
647         }
648
649         for (i=0; i<num_subkeys; i++) {
650                 path = talloc_asprintf(ctx, "%s/%s",
651                                         key,
652                                         regsubkey_ctr_specific_key(ctr, i));
653                 if (!path) {
654                         goto cancel;
655                 }
656                 if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
657                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
658                         goto cancel;
659                 }
660
661                 if (regdb_fetch_keys( path, subkeys ) == -1) {
662                         /* create a record with 0 subkeys */
663                         if (!regdb_store_keys_internal(path, subkeys)) {
664                                 DEBUG(0,("regdb_store_keys: Failed to store "
665                                          "new record for key [%s]\n", path));
666                                 goto cancel;
667                         }
668                 }
669
670                 TALLOC_FREE(subkeys);
671                 TALLOC_FREE(path);
672         }
673
674         if (regdb->transaction_commit(regdb) != 0) {
675                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
676                 goto fail;
677         }
678
679         TALLOC_FREE(ctx);
680         return true;
681
682 cancel:
683         if (regdb->transaction_cancel(regdb) != 0) {
684                 smb_panic("regdb_store_keys: transaction_cancel failed\n");
685         }
686
687 fail:
688         TALLOC_FREE(ctx);
689
690         return false;
691 }
692
693
694 /***********************************************************************
695  Retrieve an array of strings containing subkeys.  Memory should be
696  released by the caller.
697  ***********************************************************************/
698
699 int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
700 {
701         char *path = NULL;
702         uint32 num_items;
703         uint8 *buf;
704         uint32 buflen, len;
705         int i;
706         fstring subkeyname;
707         int ret = -1;
708         int dbret = -1;
709         TALLOC_CTX *frame = talloc_stackframe();
710         TDB_DATA value;
711
712         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
713
714         path = talloc_strdup(frame, key);
715         if (!path) {
716                 goto fail;
717         }
718
719         /* convert to key format */
720         path = talloc_string_sub(frame, path, "\\", "/");
721         if (!path) {
722                 goto fail;
723         }
724         strupper_m(path);
725
726         ctr->seqnum = regdb_get_seqnum();
727
728         dbret = regdb->fetch(regdb, frame, string_term_tdb_data(path), &value);
729         if (dbret != 0) {
730                 goto fail;
731         }
732
733         buf = value.dptr;
734         buflen = value.dsize;
735
736         if ( !buf ) {
737                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
738                 goto fail;
739         }
740
741         len = tdb_unpack( buf, buflen, "d", &num_items);
742
743         for (i=0; i<num_items; i++) {
744                 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
745                 regsubkey_ctr_addkey(ctr, subkeyname);
746         }
747
748         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
749
750         ret = num_items;
751  fail:
752         TALLOC_FREE(frame);
753         return ret;
754 }
755
756 /****************************************************************************
757  Unpack a list of registry values frem the TDB
758  ***************************************************************************/
759
760 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
761 {
762         int             len = 0;
763         uint32          type;
764         fstring valuename;
765         uint32          size;
766         uint8           *data_p;
767         uint32          num_values = 0;
768         int             i;
769
770         /* loop and unpack the rest of the registry values */
771
772         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
773
774         for ( i=0; i<num_values; i++ ) {
775                 /* unpack the next regval */
776
777                 type = REG_NONE;
778                 size = 0;
779                 data_p = NULL;
780                 valuename[0] = '\0';
781                 len += tdb_unpack(buf+len, buflen-len, "fdB",
782                                   valuename,
783                                   &type,
784                                   &size,
785                                   &data_p);
786
787                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
788
789                 if (*valuename && size && data_p) {
790                         regval_ctr_addvalue(values, valuename, type,
791                                         (const char *)data_p, size);
792                 }
793                 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
794
795                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
796         }
797
798         return len;
799 }
800
801 /****************************************************************************
802  Pack all values in all printer keys
803  ***************************************************************************/
804
805 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
806 {
807         int             len = 0;
808         int             i;
809         REGISTRY_VALUE  *val;
810         int             num_values;
811
812         if ( !values )
813                 return 0;
814
815         num_values = regval_ctr_numvals( values );
816
817         /* pack the number of values first */
818
819         len += tdb_pack( buf+len, buflen-len, "d", num_values );
820
821         /* loop over all values */
822
823         for ( i=0; i<num_values; i++ ) {
824                 val = regval_ctr_specific_value( values, i );
825                 len += tdb_pack(buf+len, buflen-len, "fdB",
826                                 regval_name(val),
827                                 regval_type(val),
828                                 regval_size(val),
829                                 regval_data_p(val) );
830         }
831
832         return len;
833 }
834
835 /***********************************************************************
836  Retrieve an array of strings containing subkeys.  Memory should be
837  released by the caller.
838  ***********************************************************************/
839
840 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
841 {
842         char *keystr = NULL;
843         TALLOC_CTX *ctx = talloc_stackframe();
844         int ret = 0;
845         int dbret = -1;
846         TDB_DATA value;
847
848         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
849
850         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key);
851         if (!keystr) {
852                 return 0;
853         }
854         keystr = normalize_reg_path(ctx, keystr);
855         if (!keystr) {
856                 goto done;
857         }
858
859         values->seqnum = regdb_get_seqnum();
860
861         dbret = regdb->fetch(regdb, ctx, string_term_tdb_data(keystr), &value);
862         if (dbret != 0) {
863                 goto done;
864         }
865
866         if (!value.dptr) {
867                 /* all keys have zero values by default */
868                 goto done;
869         }
870
871         regdb_unpack_values(values, value.dptr, value.dsize);
872         ret = regval_ctr_numvals(values);
873
874 done:
875         TALLOC_FREE(ctx);
876         return ret;
877 }
878
879 bool regdb_store_values( const char *key, REGVAL_CTR *values )
880 {
881         TDB_DATA old_data, data;
882         char *keystr = NULL;
883         TALLOC_CTX *ctx = talloc_stackframe();
884         int len, ret;
885         bool result = false;
886
887         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
888
889         ZERO_STRUCT(data);
890
891         len = regdb_pack_values(values, data.dptr, data.dsize);
892         if (len <= 0) {
893                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
894                 goto done;
895         }
896
897         data.dptr = TALLOC_ARRAY(ctx, uint8, len);
898         data.dsize = len;
899
900         len = regdb_pack_values(values, data.dptr, data.dsize);
901
902         SMB_ASSERT( len == data.dsize );
903
904         keystr = talloc_asprintf(ctx, "%s/%s", REG_VALUE_PREFIX, key );
905         if (!keystr) {
906                 goto done;
907         }
908         keystr = normalize_reg_path(ctx, keystr);
909         if (!keystr) {
910                 goto done;
911         }
912
913         old_data = dbwrap_fetch_bystring(regdb, ctx, keystr);
914
915         if ((old_data.dptr != NULL)
916             && (old_data.dsize == data.dsize)
917             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
918         {
919                 result = true;
920                 goto done;
921         }
922
923         ret = dbwrap_trans_store(regdb, string_term_tdb_data(keystr), data,
924                                  TDB_REPLACE);
925         result = (ret != -1);
926
927 done:
928         TALLOC_FREE(ctx);
929         return result;
930 }
931
932 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
933                                 struct security_descriptor **psecdesc)
934 {
935         char *tdbkey;
936         TDB_DATA data;
937         NTSTATUS status;
938         TALLOC_CTX *tmp_ctx = talloc_stackframe();
939         WERROR err = WERR_OK;
940
941         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
942
943         tdbkey = talloc_asprintf(tmp_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
944         if (tdbkey == NULL) {
945                 err = WERR_NOMEM;
946                 goto done;
947         }
948         normalize_dbkey(tdbkey);
949
950         data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
951         if (data.dptr == NULL) {
952                 err = WERR_BADFILE;
953                 goto done;
954         }
955
956         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
957                                      psecdesc);
958
959         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
960                 err = WERR_NOMEM;
961         } else if (!NT_STATUS_IS_OK(status)) {
962                 err = WERR_REG_CORRUPT;
963         }
964
965 done:
966         TALLOC_FREE(tmp_ctx);
967         return err;
968 }
969
970 static WERROR regdb_set_secdesc(const char *key,
971                                 struct security_descriptor *secdesc)
972 {
973         TALLOC_CTX *mem_ctx = talloc_stackframe();
974         char *tdbkey;
975         WERROR err = WERR_NOMEM;
976         TDB_DATA tdbdata;
977         int tdb_ret;
978
979         tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
980         if (tdbkey == NULL) {
981                 goto done;
982         }
983         normalize_dbkey(tdbkey);
984
985         if (secdesc == NULL) {
986                 /* assuming a delete */
987                 tdb_ret = dbwrap_trans_delete(regdb,
988                                               string_term_tdb_data(tdbkey));
989                 if (tdb_ret == 0) {
990                         err = WERR_OK;
991                 } else {
992                         err = ntstatus_to_werror(map_nt_error_from_unix(errno));
993                 }
994                 goto done;
995         }
996
997         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
998                                                    &tdbdata.dptr,
999                                                    &tdbdata.dsize));
1000         if (!W_ERROR_IS_OK(err)) {
1001                 goto done;
1002         }
1003
1004         tdb_ret = dbwrap_trans_store(regdb, string_term_tdb_data(tdbkey),
1005                                      tdbdata, 0);
1006         if (tdb_ret != 0) {
1007                 err = ntstatus_to_werror(map_nt_error_from_unix(errno));
1008                 goto done;
1009         }
1010
1011  done:
1012         TALLOC_FREE(mem_ctx);
1013         return err;
1014 }
1015
1016 bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
1017 {
1018         return (regdb_get_seqnum() != subkeys->seqnum);
1019 }
1020
1021 bool regdb_values_need_update(REGVAL_CTR *values)
1022 {
1023         return (regdb_get_seqnum() != values->seqnum);
1024 }
1025
1026 /* 
1027  * Table of function pointers for default access
1028  */
1029  
1030 REGISTRY_OPS regdb_ops = {
1031         .fetch_subkeys = regdb_fetch_keys,
1032         .fetch_values = regdb_fetch_values,
1033         .store_subkeys = regdb_store_keys,
1034         .store_values = regdb_store_values,
1035         .get_secdesc = regdb_get_secdesc,
1036         .set_secdesc = regdb_set_secdesc,
1037         .subkeys_need_update = regdb_subkeys_need_update,
1038         .values_need_update = regdb_values_need_update
1039 };