LCOV - code coverage report
Current view: top level - source3/registry - reg_api.c (source / functions) Hit Total Coverage
Test: coverage report for master 2b515b7d Lines: 366 499 73.3 %
Date: 2024-02-28 12:06:22 Functions: 24 26 92.3 %

          Line data    Source code
       1             : /*
       2             :  *  Unix SMB/CIFS implementation.
       3             :  *  Virtual Windows Registry Layer
       4             :  *  Copyright (C) Volker Lendecke 2006
       5             :  *  Copyright (C) Michael Adam 2007-2010
       6             :  *
       7             :  *  This program is free software; you can redistribute it and/or modify
       8             :  *  it under the terms of the GNU General Public License as published by
       9             :  *  the Free Software Foundation; either version 3 of the License, or
      10             :  *  (at your option) any later version.
      11             :  *
      12             :  *  This program is distributed in the hope that it will be useful,
      13             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :  *  GNU General Public License for more details.
      16             :  *
      17             :  *  You should have received a copy of the GNU General Public License
      18             :  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
      19             :  */
      20             : 
      21             : /* Attempt to wrap the existing API in a more winreg.idl-like way */
      22             : 
      23             : /*
      24             :  * Here is a list of winreg.idl functions and corresponding implementations
      25             :  * provided here:
      26             :  *
      27             :  * 0x00         winreg_OpenHKCR
      28             :  * 0x01         winreg_OpenHKCU
      29             :  * 0x02         winreg_OpenHKLM
      30             :  * 0x03         winreg_OpenHKPD
      31             :  * 0x04         winreg_OpenHKU
      32             :  * 0x05         winreg_CloseKey
      33             :  * 0x06         winreg_CreateKey                        reg_createkey
      34             :  * 0x07         winreg_DeleteKey                        reg_deletekey
      35             :  * 0x08         winreg_DeleteValue                      reg_deletevalue
      36             :  * 0x09         winreg_EnumKey                          reg_enumkey
      37             :  * 0x0a         winreg_EnumValue                        reg_enumvalue
      38             :  * 0x0b         winreg_FlushKey
      39             :  * 0x0c         winreg_GetKeySecurity                   reg_getkeysecurity
      40             :  * 0x0d         winreg_LoadKey
      41             :  * 0x0e         winreg_NotifyChangeKeyValue
      42             :  * 0x0f         winreg_OpenKey                          reg_openkey
      43             :  * 0x10         winreg_QueryInfoKey                     reg_queryinfokey
      44             :  * 0x11         winreg_QueryValue                       reg_queryvalue
      45             :  * 0x12         winreg_ReplaceKey
      46             :  * 0x13         winreg_RestoreKey                       reg_restorekey
      47             :  * 0x14         winreg_SaveKey                          reg_savekey
      48             :  * 0x15         winreg_SetKeySecurity                   reg_setkeysecurity
      49             :  * 0x16         winreg_SetValue                         reg_setvalue
      50             :  * 0x17         winreg_UnLoadKey
      51             :  * 0x18         winreg_InitiateSystemShutdown
      52             :  * 0x19         winreg_AbortSystemShutdown
      53             :  * 0x1a         winreg_GetVersion                       reg_getversion
      54             :  * 0x1b         winreg_OpenHKCC
      55             :  * 0x1c         winreg_OpenHKDD
      56             :  * 0x1d         winreg_QueryMultipleValues              reg_querymultiplevalues
      57             :  * 0x1e         winreg_InitiateSystemShutdownEx
      58             :  * 0x1f         winreg_SaveKeyEx
      59             :  * 0x20         winreg_OpenHKPT
      60             :  * 0x21         winreg_OpenHKPN
      61             :  * 0x22         winreg_QueryMultipleValues2             reg_querymultiplevalues
      62             :  *
      63             :  */
      64             : 
      65             : #include "includes.h"
      66             : #include "registry.h"
      67             : #include "reg_api.h"
      68             : #include "reg_cachehook.h"
      69             : #include "reg_backend_db.h"
      70             : #include "reg_dispatcher.h"
      71             : #include "reg_objects.h"
      72             : #include "../librpc/gen_ndr/ndr_security.h"
      73             : #include "reg_parse_internal.h"
      74             : 
      75             : #undef DBGC_CLASS
      76             : #define DBGC_CLASS DBGC_REGISTRY
      77             : 
      78             : 
      79             : /**********************************************************************
      80             :  * Helper functions
      81             :  **********************************************************************/
      82             : 
      83      311684 : static WERROR fill_value_cache(struct registry_key *key)
      84             : {
      85          70 :         WERROR werr;
      86             : 
      87      311684 :         if (key->values != NULL) {
      88      259086 :                 if (!reg_values_need_update(key->key, key->values)) {
      89      258461 :                         return WERR_OK;
      90             :                 }
      91             :         }
      92             : 
      93       53223 :         TALLOC_FREE(key->values);
      94       53223 :         werr = regval_ctr_init(key, &(key->values));
      95       53223 :         W_ERROR_NOT_OK_RETURN(werr);
      96             : 
      97       53223 :         if (fetch_reg_values(key->key, key->values) == -1) {
      98           0 :                 TALLOC_FREE(key->values);
      99           0 :                 return WERR_FILE_NOT_FOUND;
     100             :         }
     101             : 
     102       53223 :         return WERR_OK;
     103             : }
     104             : 
     105     4187090 : static WERROR fill_subkey_cache(struct registry_key *key)
     106             : {
     107         263 :         WERROR werr;
     108             : 
     109     4187090 :         if (key->subkeys != NULL) {
     110      311799 :                 if (!reg_subkeys_need_update(key->key, key->subkeys)) {
     111      311697 :                         return WERR_OK;
     112             :                 }
     113             :         }
     114             : 
     115     3875393 :         TALLOC_FREE(key->subkeys);
     116     3875393 :         werr = regsubkey_ctr_init(key, &(key->subkeys));
     117     3875393 :         W_ERROR_NOT_OK_RETURN(werr);
     118             : 
     119     3875393 :         if (fetch_reg_keys(key->key, key->subkeys) == -1) {
     120     3477252 :                 TALLOC_FREE(key->subkeys);
     121     3477252 :                 return WERR_FILE_NOT_FOUND;
     122             :         }
     123             : 
     124      398141 :         return WERR_OK;
     125             : }
     126             : 
     127     3874835 : static int regkey_destructor(struct registry_key_handle *key)
     128             : {
     129     3874835 :         return regdb_close();
     130             : }
     131             : 
     132     3875291 : static WERROR regkey_open_onelevel(TALLOC_CTX *mem_ctx, 
     133             :                                    struct registry_key *parent,
     134             :                                    const char *name,
     135             :                                    const struct security_token *token,
     136             :                                    uint32_t access_desired,
     137             :                                    struct registry_key **pregkey)
     138             : {
     139         220 :         WERROR result;
     140         220 :         struct registry_key *regkey;
     141         220 :         struct registry_key_handle *key;
     142             : 
     143     3875291 :         DEBUG(7,("regkey_open_onelevel: name = [%s]\n", name));
     144             : 
     145     3875291 :         SMB_ASSERT(strchr(name, '\\') == NULL);
     146             : 
     147     3875291 :         if (!(regkey = talloc_zero(mem_ctx, struct registry_key)) ||
     148     3875291 :             !(regkey->token = security_token_duplicate(regkey, token)) ||
     149     3875291 :             !(regkey->key = talloc_zero(regkey, struct registry_key_handle)))
     150             :         {
     151           0 :                 result = WERR_NOT_ENOUGH_MEMORY;
     152           0 :                 goto done;
     153             :         }
     154             : 
     155     3875291 :         result = regdb_open();
     156     3875291 :         if (!(W_ERROR_IS_OK(result))) {
     157           0 :                 goto done;
     158             :         }
     159             : 
     160     3875291 :         key = regkey->key;
     161     3875291 :         talloc_set_destructor(key, regkey_destructor);
     162             : 
     163             :         /* initialization */
     164             : 
     165     3875291 :         key->type = REG_KEY_GENERIC;
     166             : 
     167     3875291 :         if (name[0] == '\0') {
     168             :                 /*
     169             :                  * Open a copy of the parent key
     170             :                  */
     171          59 :                 if (!parent) {
     172           0 :                         result = WERR_FILE_NOT_FOUND;
     173           0 :                         goto done;
     174             :                 }
     175          59 :                 key->name = talloc_strdup(key, parent->key->name);
     176             :         }
     177             :         else {
     178             :                 /*
     179             :                  * Normal subkey open
     180             :                  */
     181     7704498 :                 key->name = talloc_asprintf(key, "%s%s%s",
     182     3829243 :                                             parent ? parent->key->name : "",
     183             :                                             parent ? "\\": "",
     184             :                                             name);
     185             :         }
     186             : 
     187     3875291 :         if (key->name == NULL) {
     188           0 :                 result = WERR_NOT_ENOUGH_MEMORY;
     189           0 :                 goto done;
     190             :         }
     191             : 
     192             :         /* Tag this as a Performance Counter Key */
     193             : 
     194     3875291 :         if( strncasecmp_m(key->name, KEY_HKPD, strlen(KEY_HKPD)) == 0 )
     195           0 :                 key->type = REG_KEY_HKPD;
     196             : 
     197             :         /* Look up the table of registry I/O operations */
     198             : 
     199     3875291 :         key->ops = reghook_cache_find( key->name );
     200     3875291 :         if (key->ops == NULL) {
     201           0 :                 DEBUG(0,("reg_open_onelevel: Failed to assign "
     202             :                          "registry_ops to [%s]\n", key->name ));
     203           0 :                 result = WERR_FILE_NOT_FOUND;
     204           0 :                 goto done;
     205             :         }
     206             : 
     207             :         /* FIXME: Existence is currently checked by fetching the subkeys */
     208             : 
     209     3875291 :         result = fill_subkey_cache(regkey);
     210     3875291 :         if (!W_ERROR_IS_OK(result)) {
     211     3477252 :                 goto done;
     212             :         }
     213             : 
     214      398039 :         if ( !regkey_access_check( key, access_desired, &key->access_granted,
     215             :                                    token ) ) {
     216           0 :                 result = WERR_ACCESS_DENIED;
     217           0 :                 goto done;
     218             :         }
     219             : 
     220      398039 :         *pregkey = regkey;
     221      398039 :         result = WERR_OK;
     222             : 
     223     3875291 : done:
     224     3875291 :         if ( !W_ERROR_IS_OK(result) ) {
     225     3477252 :                 TALLOC_FREE(regkey);
     226             :         }
     227             : 
     228     3875291 :         return result;
     229             : }
     230             : 
     231       45991 : WERROR reg_openhive(TALLOC_CTX *mem_ctx, const char *hive,
     232             :                     uint32_t desired_access,
     233             :                     const struct security_token *token,
     234             :                     struct registry_key **pkey)
     235             : {
     236          23 :         const struct hive_info *hi;
     237       45991 :         SMB_ASSERT(hive != NULL);
     238       45991 :         SMB_ASSERT(strchr(hive, '\\') == NULL);
     239             : 
     240       45991 :         hi = hive_info(hive);
     241       45991 :         if (hi == NULL) {
     242           2 :                 return WERR_FILE_NOT_FOUND;
     243             :         }
     244             : 
     245       45989 :         return regkey_open_onelevel(mem_ctx, NULL, hi->short_name, token,
     246             :                                     desired_access, pkey);
     247             : }
     248             : 
     249             : 
     250             : /**********************************************************************
     251             :  * The API functions
     252             :  **********************************************************************/
     253             : 
     254     3568486 : WERROR reg_openkey(TALLOC_CTX *mem_ctx, struct registry_key *parent,
     255             :                    const char *name, uint32_t desired_access,
     256             :                    struct registry_key **pkey)
     257             : {
     258     3568486 :         struct registry_key *direct_parent = parent;
     259         162 :         WERROR err;
     260         162 :         char *p, *path;
     261         162 :         size_t len;
     262     3568486 :         TALLOC_CTX *frame = talloc_stackframe();
     263             : 
     264     3568486 :         path = talloc_strdup(frame, name);
     265     3568486 :         if (path == NULL) {
     266           0 :                 err = WERR_NOT_ENOUGH_MEMORY;
     267           0 :                 goto error;
     268             :         }
     269             : 
     270     3568486 :         len = strlen(path);
     271             : 
     272     3568486 :         if ((len > 0) && (path[len-1] == '\\')) {
     273           0 :                 path[len-1] = '\0';
     274             :         }
     275             : 
     276     3829302 :         while ((p = strchr(path, '\\')) != NULL) {
     277          35 :                 char *name_component;
     278          35 :                 struct registry_key *tmp;
     279             : 
     280      262656 :                 name_component = talloc_strndup(frame, path, (p - path));
     281      262656 :                 if (name_component == NULL) {
     282           0 :                         err = WERR_NOT_ENOUGH_MEMORY;
     283           0 :                         goto error;
     284             :                 }
     285             : 
     286      262691 :                 err = regkey_open_onelevel(frame, direct_parent,
     287      262656 :                                            name_component, parent->token,
     288             :                                            KEY_ENUMERATE_SUB_KEYS, &tmp);
     289             : 
     290      262656 :                 if (!W_ERROR_IS_OK(err)) {
     291        1840 :                         goto error;
     292             :                 }
     293             : 
     294      260816 :                 direct_parent = tmp;
     295      260816 :                 path = p+1;
     296             :         }
     297             : 
     298     3566646 :         err = regkey_open_onelevel(mem_ctx, direct_parent, path, parent->token,
     299             :                                    desired_access, pkey);
     300             : 
     301     3568486 : error:
     302     3568486 :         talloc_free(frame);
     303     3568486 :         return err;
     304             : }
     305             : 
     306      289794 : WERROR reg_enumkey(TALLOC_CTX *mem_ctx, struct registry_key *key,
     307             :                    uint32_t idx, char **name, NTTIME *last_write_time)
     308             : {
     309          21 :         WERROR err;
     310             : 
     311      289794 :         if (!(key->key->access_granted & KEY_ENUMERATE_SUB_KEYS)) {
     312           0 :                 return WERR_ACCESS_DENIED;
     313             :         }
     314             : 
     315      289794 :         err = fill_subkey_cache(key);
     316      289794 :         if (!W_ERROR_IS_OK(err)) {
     317           0 :                 return err;
     318             :         }
     319             : 
     320      289794 :         if (idx >= regsubkey_ctr_numkeys(key->subkeys)) {
     321        1121 :                 return WERR_NO_MORE_ITEMS;
     322             :         }
     323             : 
     324      288673 :         if (!(*name = talloc_strdup(mem_ctx,
     325      288673 :                         regsubkey_ctr_specific_key(key->subkeys, idx))))
     326             :         {
     327           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     328             :         }
     329             : 
     330      288673 :         if (last_write_time) {
     331       66977 :                 *last_write_time = 0;
     332             :         }
     333             : 
     334      288673 :         return WERR_OK;
     335             : }
     336             : 
     337      216797 : WERROR reg_enumvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
     338             :                      uint32_t idx, char **pname, struct registry_value **pval)
     339             : {
     340          29 :         struct registry_value *val;
     341          29 :         struct regval_blob *blob;
     342          29 :         WERROR err;
     343             : 
     344      216797 :         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
     345           0 :                 return WERR_ACCESS_DENIED;
     346             :         }
     347             : 
     348      216797 :         err = fill_value_cache(key);
     349      216797 :         if (!(W_ERROR_IS_OK(err))) {
     350           0 :                 return err;
     351             :         }
     352             : 
     353      216797 :         if (idx >= regval_ctr_numvals(key->values)) {
     354        5474 :                 return WERR_NO_MORE_ITEMS;
     355             :         }
     356             : 
     357      211323 :         blob = regval_ctr_specific_value(key->values, idx);
     358             : 
     359      211323 :         val = talloc_zero(mem_ctx, struct registry_value);
     360      211323 :         if (val == NULL) {
     361           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     362             :         }
     363             : 
     364      211323 :         val->type = regval_type(blob);
     365      211323 :         val->data = data_blob_talloc(mem_ctx, regval_data_p(blob), regval_size(blob));
     366             : 
     367      211323 :         if (pname
     368      211163 :             && !(*pname = talloc_strdup(
     369      211163 :                          mem_ctx, regval_name(blob)))) {
     370           0 :                 TALLOC_FREE(val);
     371           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     372             :         }
     373             : 
     374      211323 :         *pval = val;
     375      211323 :         return WERR_OK;
     376             : }
     377             : 
     378       38190 : static WERROR reg_enumvalue_nocachefill(TALLOC_CTX *mem_ctx,
     379             :                                         struct registry_key *key,
     380             :                                         uint32_t idx, char **pname,
     381             :                                         struct registry_value **pval)
     382             : {
     383           3 :         struct registry_value *val;
     384           3 :         struct regval_blob *blob;
     385             : 
     386       38190 :         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
     387           0 :                 return WERR_ACCESS_DENIED;
     388             :         }
     389             : 
     390       38190 :         if (idx >= regval_ctr_numvals(key->values)) {
     391           0 :                 return WERR_NO_MORE_ITEMS;
     392             :         }
     393             : 
     394       38190 :         blob = regval_ctr_specific_value(key->values, idx);
     395             : 
     396       38190 :         val = talloc_zero(mem_ctx, struct registry_value);
     397       38190 :         if (val == NULL) {
     398           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     399             :         }
     400             : 
     401       38190 :         val->type = regval_type(blob);
     402       38190 :         val->data = data_blob_talloc(mem_ctx, regval_data_p(blob), regval_size(blob));
     403             : 
     404       38190 :         if (pname
     405           0 :             && !(*pname = talloc_strdup(
     406           0 :                          mem_ctx, regval_name(blob)))) {
     407           0 :                 TALLOC_FREE(val);
     408           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     409             :         }
     410             : 
     411       38190 :         *pval = val;
     412       38190 :         return WERR_OK;
     413             : }
     414             : 
     415       50656 : WERROR reg_queryvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
     416             :                       const char *name, struct registry_value **pval)
     417             : {
     418          17 :         WERROR err;
     419          17 :         uint32_t i;
     420             : 
     421       50656 :         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
     422           0 :                 return WERR_ACCESS_DENIED;
     423             :         }
     424             : 
     425       50656 :         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
     426           0 :                 return err;
     427             :         }
     428             : 
     429      600219 :         for (i=0; i < regval_ctr_numvals(key->values); i++) {
     430          36 :                 struct regval_blob *blob;
     431      587753 :                 blob = regval_ctr_specific_value(key->values, i);
     432      587753 :                 if (strequal(regval_name(blob), name)) {
     433             :                         /*
     434             :                          * don't use reg_enumvalue here:
     435             :                          * re-reading the values from the disk
     436             :                          * would change the indexing and break
     437             :                          * this function.
     438             :                          */
     439       38190 :                         return reg_enumvalue_nocachefill(mem_ctx, key, i,
     440             :                                                          NULL, pval);
     441             :                 }
     442             :         }
     443             : 
     444       12466 :         return WERR_FILE_NOT_FOUND;
     445             : }
     446             : 
     447         176 : WERROR reg_querymultiplevalues(TALLOC_CTX *mem_ctx,
     448             :                                struct registry_key *key,
     449             :                                uint32_t num_names,
     450             :                                const char **names,
     451             :                                uint32_t *pnum_vals,
     452             :                                struct registry_value **pvals)
     453             : {
     454           0 :         WERROR err;
     455         176 :         uint32_t i, n, found = 0;
     456           0 :         struct registry_value *vals;
     457             : 
     458         176 :         if (num_names == 0) {
     459          72 :                 return WERR_OK;
     460             :         }
     461             : 
     462         104 :         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
     463           0 :                 return WERR_ACCESS_DENIED;
     464             :         }
     465             : 
     466         104 :         if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
     467           0 :                 return err;
     468             :         }
     469             : 
     470         104 :         vals = talloc_zero_array(mem_ctx, struct registry_value, num_names);
     471         104 :         if (vals == NULL) {
     472           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     473             :         }
     474             : 
     475         304 :         for (n=0; n < num_names; n++) {
     476         600 :                 for (i=0; i < regval_ctr_numvals(key->values); i++) {
     477           0 :                         struct regval_blob *blob;
     478         400 :                         blob = regval_ctr_specific_value(key->values, i);
     479         400 :                         if (strequal(regval_name(blob), names[n])) {
     480           0 :                                 struct registry_value *v;
     481         160 :                                 err = reg_enumvalue(mem_ctx, key, i, NULL, &v);
     482         160 :                                 if (!W_ERROR_IS_OK(err)) {
     483           0 :                                         return err;
     484             :                                 }
     485         160 :                                 vals[n] = *v;
     486         160 :                                 found++;
     487             :                         }
     488             :                 }
     489             :         }
     490             : 
     491         104 :         *pvals = vals;
     492         104 :         *pnum_vals = found;
     493             : 
     494         104 :         return WERR_OK;
     495             : }
     496             : 
     497       20366 : WERROR reg_queryinfokey(struct registry_key *key, uint32_t *num_subkeys,
     498             :                         uint32_t *max_subkeylen, uint32_t *max_subkeysize, 
     499             :                         uint32_t *num_values, uint32_t *max_valnamelen, 
     500             :                         uint32_t *max_valbufsize, uint32_t *secdescsize,
     501             :                         NTTIME *last_changed_time)
     502             : {
     503           0 :         uint32_t i, max_size;
     504           0 :         size_t max_len;
     505           0 :         TALLOC_CTX *mem_ctx;
     506           0 :         WERROR err;
     507           0 :         struct security_descriptor *secdesc;
     508             : 
     509       20366 :         if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
     510           0 :                 return WERR_ACCESS_DENIED;
     511             :         }
     512             : 
     513       20366 :         if (!W_ERROR_IS_OK(fill_subkey_cache(key)) ||
     514       20366 :             !W_ERROR_IS_OK(fill_value_cache(key))) {
     515           0 :                 return WERR_FILE_NOT_FOUND;
     516             :         }
     517             : 
     518       20366 :         max_len = 0;
     519      113281 :         for (i=0; i< regsubkey_ctr_numkeys(key->subkeys); i++) {
     520       92915 :                 max_len = MAX(max_len,
     521             :                         strlen(regsubkey_ctr_specific_key(key->subkeys, i)));
     522             :         }
     523             : 
     524       20366 :         *num_subkeys = regsubkey_ctr_numkeys(key->subkeys);
     525       20366 :         *max_subkeylen = max_len;
     526       20366 :         *max_subkeysize = 0;    /* Class length? */
     527             : 
     528       20366 :         max_len = 0;
     529       20366 :         max_size = 0;
     530      231932 :         for (i=0; i < regval_ctr_numvals(key->values); i++) {
     531           0 :                 struct regval_blob *blob;
     532      211566 :                 blob = regval_ctr_specific_value(key->values, i);
     533      211566 :                 max_len = MAX(max_len, strlen(regval_name(blob)));
     534      211566 :                 max_size = MAX(max_size, regval_size(blob));
     535             :         }
     536             : 
     537       20366 :         *num_values = regval_ctr_numvals(key->values);
     538       20366 :         *max_valnamelen = max_len;
     539       20366 :         *max_valbufsize = max_size;
     540             : 
     541       20366 :         if (!(mem_ctx = talloc_new(key))) {
     542           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     543             :         }
     544             : 
     545       20366 :         err = regkey_get_secdesc(mem_ctx, key->key, &secdesc);
     546       20366 :         if (!W_ERROR_IS_OK(err)) {
     547           0 :                 TALLOC_FREE(mem_ctx);
     548           0 :                 return err;
     549             :         }
     550             : 
     551       20366 :         *secdescsize = ndr_size_security_descriptor(secdesc, 0);
     552       20366 :         TALLOC_FREE(mem_ctx);
     553             : 
     554       20366 :         *last_changed_time = 0;
     555             : 
     556       20366 :         return WERR_OK;
     557             : }
     558             : 
     559       37685 : WERROR reg_createkey(TALLOC_CTX *ctx, struct registry_key *parent,
     560             :                      const char *subkeypath, uint32_t desired_access,
     561             :                      struct registry_key **pkey,
     562             :                      enum winreg_CreateAction *paction)
     563             : {
     564       37685 :         struct registry_key *key = parent;
     565          25 :         TALLOC_CTX *mem_ctx;
     566          25 :         char *path, *end;
     567          25 :         WERROR err;
     568          25 :         uint32_t access_granted;
     569             : 
     570       37685 :         mem_ctx = talloc_new(ctx);
     571       37685 :         if (mem_ctx == NULL) {
     572           0 :                 return WERR_NOT_ENOUGH_MEMORY;
     573             :         }
     574             : 
     575       37685 :         path = talloc_strdup(mem_ctx, subkeypath);
     576       37685 :         if (path == NULL) {
     577           0 :                 err = WERR_NOT_ENOUGH_MEMORY;
     578           0 :                 goto done;
     579             :         }
     580             : 
     581       37685 :         err = regdb_transaction_start();
     582       37685 :         if (!W_ERROR_IS_OK(err)) {
     583           0 :                 DEBUG(0, ("reg_createkey: failed to start transaction: %s\n",
     584             :                           win_errstr(err)));
     585           0 :                 goto done;
     586             :         }
     587             : 
     588       68112 :         while ((end = strchr(path, '\\')) != NULL) {
     589           0 :                 struct registry_key *tmp;
     590           0 :                 enum winreg_CreateAction action;
     591             : 
     592       30427 :                 *end = '\0';
     593             : 
     594       30427 :                 err = reg_createkey(mem_ctx, key, path,
     595             :                                     KEY_ENUMERATE_SUB_KEYS, &tmp, &action);
     596       30427 :                 if (!W_ERROR_IS_OK(err)) {
     597           0 :                         goto trans_done;
     598             :                 }
     599             : 
     600       30427 :                 if (key != parent) {
     601       24403 :                         TALLOC_FREE(key);
     602             :                 }
     603             : 
     604       30427 :                 key = tmp;
     605       30427 :                 path = end+1;
     606             :         }
     607             : 
     608             :         /*
     609             :          * At this point, "path" contains the one-element subkey of "key". We
     610             :          * can try to open it.
     611             :          */
     612             : 
     613       37685 :         err = reg_openkey(ctx, key, path, desired_access, pkey);
     614       37685 :         if (W_ERROR_IS_OK(err)) {
     615       35147 :                 if (paction != NULL) {
     616       35147 :                         *paction = REG_OPENED_EXISTING_KEY;
     617             :                 }
     618       35147 :                 goto trans_done;
     619             :         }
     620             : 
     621        2538 :         if (!W_ERROR_EQUAL(err, WERR_FILE_NOT_FOUND)) {
     622             :                 /*
     623             :                  * Something but "notfound" has happened, so bail out
     624             :                  */
     625           0 :                 goto trans_done;
     626             :         }
     627             : 
     628             :         /*
     629             :          * We may (e.g. in the iteration) have opened the key with ENUM_SUBKEY.
     630             :          * Instead of re-opening the key with CREATE_SUB_KEY, we simply
     631             :          * duplicate the access check here and skip the expensive full open.
     632             :          */
     633        2538 :         if (!regkey_access_check(key->key, KEY_CREATE_SUB_KEY, &access_granted,
     634        2538 :                                  key->token))
     635             :         {
     636           0 :                 err = WERR_ACCESS_DENIED;
     637           0 :                 goto trans_done;
     638             :         }
     639             : 
     640             :         /*
     641             :          * Actually create the subkey
     642             :          */
     643             : 
     644        2538 :         err = create_reg_subkey(key->key, path);
     645        2538 :         if (!W_ERROR_IS_OK(err)) {
     646           0 :                 goto trans_done;
     647             :         }
     648             : 
     649             :         /*
     650             :          * Now open the newly created key
     651             :          */
     652             : 
     653        2538 :         err = reg_openkey(ctx, key, path, desired_access, pkey);
     654        2538 :         if (W_ERROR_IS_OK(err) && (paction != NULL)) {
     655        2538 :                 *paction = REG_CREATED_NEW_KEY;
     656             :         }
     657             : 
     658           0 : trans_done:
     659       37685 :         if (W_ERROR_IS_OK(err)) {
     660       37685 :                 err = regdb_transaction_commit();
     661       37685 :                 if (!W_ERROR_IS_OK(err)) {
     662           0 :                         DEBUG(0, ("reg_createkey: Error committing transaction: %s\n", win_errstr(err)));
     663             :                 }
     664             :         } else {
     665           0 :                 WERROR err1 = regdb_transaction_cancel();
     666           0 :                 if (!W_ERROR_IS_OK(err1)) {
     667           0 :                         DEBUG(0, ("reg_createkey: Error cancelling transaction: %s\n", win_errstr(err1)));
     668             :                 }
     669             :         }
     670             : 
     671       37685 :  done:
     672       37685 :         TALLOC_FREE(mem_ctx);
     673       37685 :         return err;
     674             : }
     675             : 
     676        1594 : static WERROR reg_deletekey_internal(TALLOC_CTX *mem_ctx,
     677             :                                      struct registry_key *parent,
     678             :                                      const char *path, bool lazy)
     679             : {
     680          11 :         WERROR err;
     681          11 :         char *name, *end;
     682          11 :         struct registry_key *key;
     683        1594 :         name = talloc_strdup(mem_ctx, path);
     684        1594 :         if (name == NULL) {
     685           0 :                 err = WERR_NOT_ENOUGH_MEMORY;
     686           0 :                 goto done;
     687             :         }
     688             : 
     689             :         /* no subkeys - proceed with delete */
     690        1594 :         end = strrchr(name, '\\');
     691        1594 :         if (end != NULL) {
     692        1056 :                 *end = '\0';
     693             : 
     694        1056 :                 err = reg_openkey(mem_ctx, parent, name,
     695             :                                   KEY_CREATE_SUB_KEY, &key);
     696        1056 :                 W_ERROR_NOT_OK_GOTO_DONE(err);
     697             : 
     698        1056 :                 parent = key;
     699        1056 :                 name = end+1;
     700             :         }
     701             : 
     702        1594 :         if (name[0] == '\0') {
     703           0 :                 err = WERR_INVALID_PARAMETER;
     704           0 :                 goto done;
     705             :         }
     706             : 
     707        1594 :         err = delete_reg_subkey(parent->key, name, lazy);
     708             : 
     709        1594 : done:
     710        1594 :         return err;
     711             : }
     712             : 
     713        1212 : WERROR reg_deletekey(struct registry_key *parent, const char *path)
     714             : {
     715           0 :         WERROR err;
     716           0 :         struct registry_key *key;
     717        1212 :         TALLOC_CTX *mem_ctx = talloc_stackframe();
     718             : 
     719             :         /* check if the key has subkeys */
     720        1212 :         err = reg_openkey(mem_ctx, parent, path, REG_KEY_READ, &key);
     721        1212 :         W_ERROR_NOT_OK_GOTO_DONE(err);
     722             : 
     723        1138 :         err = regdb_transaction_start();
     724        1138 :         if (!W_ERROR_IS_OK(err)) {
     725           0 :                 DEBUG(0, ("reg_deletekey: Error starting transaction: %s\n",
     726             :                           win_errstr(err)));
     727           0 :                 goto done;
     728             :         }
     729             : 
     730        1138 :         err = fill_subkey_cache(key);
     731        1138 :         if (!W_ERROR_IS_OK(err)) {
     732           0 :                 goto trans_done;
     733             :         }
     734             : 
     735        1138 :         if (regsubkey_ctr_numkeys(key->subkeys) > 0) {
     736           4 :                 err = WERR_ACCESS_DENIED;
     737           4 :                 goto trans_done;
     738             :         }
     739        1134 :         err = reg_deletekey_internal(mem_ctx, parent, path, false);
     740             : 
     741        1138 : trans_done:
     742        1138 :         if (W_ERROR_IS_OK(err)) {
     743        1134 :                 err = regdb_transaction_commit();
     744        1134 :                 if (!W_ERROR_IS_OK(err)) {
     745           0 :                         DEBUG(0, ("reg_deletekey: Error committing transaction: %s\n", win_errstr(err)));
     746             :                 }
     747             :         } else {
     748           4 :                 WERROR err1 = regdb_transaction_cancel();
     749           4 :                 if (!W_ERROR_IS_OK(err1)) {
     750           0 :                         DEBUG(0, ("reg_deletekey: Error cancelling transaction: %s\n", win_errstr(err1)));
     751             :                 }
     752             :         }
     753             : 
     754        1212 : done:
     755        1212 :         TALLOC_FREE(mem_ctx);
     756        1212 :         return err;
     757             : }
     758             : 
     759             : 
     760       20584 : WERROR reg_setvalue(struct registry_key *key, const char *name,
     761             :                     const struct registry_value *val)
     762             : {
     763          21 :         struct regval_blob *existing;
     764          21 :         WERROR err;
     765          21 :         int res;
     766             : 
     767       20584 :         if (!(key->key->access_granted & KEY_SET_VALUE)) {
     768           0 :                 return WERR_ACCESS_DENIED;
     769             :         }
     770             : 
     771       20584 :         err = regdb_transaction_start();
     772       20584 :         if (!W_ERROR_IS_OK(err)) {
     773           0 :                 DEBUG(0, ("reg_setvalue: Failed to start transaction: %s\n",
     774             :                           win_errstr(err)));
     775           0 :                 return err;
     776             :         }
     777             : 
     778       20584 :         err = fill_value_cache(key);
     779       20584 :         if (!W_ERROR_IS_OK(err)) {
     780           0 :                 DEBUG(0, ("reg_setvalue: Error filling value cache: %s\n", win_errstr(err)));
     781           0 :                 goto done;
     782             :         }
     783             : 
     784       20584 :         existing = regval_ctr_getvalue(key->values, name);
     785             : 
     786       20584 :         if ((existing != NULL) &&
     787        7965 :             (regval_size(existing) == val->data.length) &&
     788        7699 :             (memcmp(regval_data_p(existing), val->data.data,
     789        7699 :                     val->data.length) == 0))
     790             :         {
     791        3906 :                 err = WERR_OK;
     792        3906 :                 goto done;
     793             :         }
     794             : 
     795       16699 :         res = regval_ctr_addvalue(key->values, name, val->type,
     796       16678 :                                   val->data.data, val->data.length);
     797             : 
     798       16678 :         if (res == 0) {
     799           0 :                 TALLOC_FREE(key->values);
     800           0 :                 err = WERR_NOT_ENOUGH_MEMORY;
     801           0 :                 goto done;
     802             :         }
     803             : 
     804       16678 :         if (!store_reg_values(key->key, key->values)) {
     805           3 :                 TALLOC_FREE(key->values);
     806           3 :                 DEBUG(0, ("reg_setvalue: store_reg_values failed\n"));
     807           3 :                 err = WERR_REGISTRY_IO_FAILED;
     808           3 :                 goto done;
     809             :         }
     810             : 
     811       16654 :         err = WERR_OK;
     812             : 
     813       20584 : done:
     814       20584 :         if (W_ERROR_IS_OK(err)) {
     815       20581 :                 err = regdb_transaction_commit();
     816       20581 :                 if (!W_ERROR_IS_OK(err)) {
     817           0 :                         DEBUG(0, ("reg_setvalue: Error committing transaction: %s\n", win_errstr(err)));
     818             :                 }
     819             :         } else {
     820           3 :                 WERROR err1 = regdb_transaction_cancel();
     821           3 :                 if (!W_ERROR_IS_OK(err1)) {
     822           0 :                         DEBUG(0, ("reg_setvalue: Error cancelling transaction: %s\n", win_errstr(err1)));
     823             :                 }
     824             :         }
     825             : 
     826       20584 :         return err;
     827             : }
     828             : 
     829        3177 : static WERROR reg_value_exists(struct registry_key *key, const char *name)
     830             : {
     831           3 :         struct regval_blob *blob;
     832             : 
     833        3180 :         blob = regval_ctr_getvalue(key->values, name);
     834             : 
     835        3177 :         if (blob == NULL) {
     836         166 :                 return WERR_FILE_NOT_FOUND;
     837             :         } else {
     838        3011 :                 return WERR_OK;
     839             :         }
     840             : }
     841             : 
     842        3177 : WERROR reg_deletevalue(struct registry_key *key, const char *name)
     843             : {
     844           3 :         WERROR err;
     845             : 
     846        3177 :         if (!(key->key->access_granted & KEY_SET_VALUE)) {
     847           0 :                 return WERR_ACCESS_DENIED;
     848             :         }
     849             : 
     850        3177 :         err = regdb_transaction_start();
     851        3177 :         if (!W_ERROR_IS_OK(err)) {
     852           0 :                 DEBUG(0, ("reg_deletevalue: Failed to start transaction: %s\n",
     853             :                           win_errstr(err)));
     854           0 :                 return err;
     855             :         }
     856             : 
     857        3177 :         err = fill_value_cache(key);
     858        3177 :         if (!W_ERROR_IS_OK(err)) {
     859           0 :                 DEBUG(0, ("reg_deletevalue; Error filling value cache: %s\n",
     860             :                           win_errstr(err)));
     861           0 :                 goto done;
     862             :         }
     863             : 
     864        3177 :         err = reg_value_exists(key, name);
     865        3177 :         if (!W_ERROR_IS_OK(err)) {
     866         166 :                 goto done;
     867             :         }
     868             : 
     869        3011 :         regval_ctr_delvalue(key->values, name);
     870             : 
     871        3011 :         if (!store_reg_values(key->key, key->values)) {
     872           0 :                 TALLOC_FREE(key->values);
     873           0 :                 err = WERR_REGISTRY_IO_FAILED;
     874           0 :                 DEBUG(0, ("reg_deletevalue: store_reg_values failed\n"));
     875           0 :                 goto done;
     876             :         }
     877             : 
     878        3008 :         err = WERR_OK;
     879             : 
     880        3177 : done:
     881        3177 :         if (W_ERROR_IS_OK(err)) {
     882        3011 :                 err = regdb_transaction_commit();
     883        3011 :                 if (!W_ERROR_IS_OK(err)) {
     884           0 :                         DEBUG(0, ("reg_deletevalue: Error committing transaction: %s\n", win_errstr(err)));
     885             :                 }
     886             :         } else {
     887         166 :                 WERROR err1 = regdb_transaction_cancel();
     888         166 :                 if (!W_ERROR_IS_OK(err1)) {
     889           0 :                         DEBUG(0, ("reg_deletevalue: Error cancelling transaction: %s\n", win_errstr(err1)));
     890             :                 }
     891             :         }
     892             : 
     893        3177 :         return err;
     894             : }
     895             : 
     896           2 : WERROR reg_getkeysecurity(TALLOC_CTX *mem_ctx, struct registry_key *key,
     897             :                           struct security_descriptor **psecdesc)
     898             : {
     899           2 :         return regkey_get_secdesc(mem_ctx, key->key, psecdesc);
     900             : }
     901             : 
     902           0 : WERROR reg_setkeysecurity(struct registry_key *key,
     903             :                           struct security_descriptor *psecdesc)
     904             : {
     905           0 :         return regkey_set_secdesc(key->key, psecdesc);
     906             : }
     907             : 
     908          28 : WERROR reg_getversion(uint32_t *version)
     909             : {
     910          28 :         if (version == NULL) {
     911           0 :                 return WERR_INVALID_PARAMETER;
     912             :         }
     913             : 
     914          28 :         *version = 0x00000005; /* Windows 2000 registry API version */
     915          28 :         return WERR_OK;
     916             : }
     917             : 
     918             : /**********************************************************************
     919             :  * Higher level utility functions
     920             :  **********************************************************************/
     921             : 
     922           0 : WERROR reg_deleteallvalues(struct registry_key *key)
     923             : {
     924           0 :         WERROR err;
     925           0 :         uint32_t i;
     926             : 
     927           0 :         if (!(key->key->access_granted & KEY_SET_VALUE)) {
     928           0 :                 return WERR_ACCESS_DENIED;
     929             :         }
     930             : 
     931           0 :         if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
     932           0 :                 return err;
     933             :         }
     934             : 
     935           0 :         for (i=0; i < regval_ctr_numvals(key->values); i++) {
     936           0 :                 struct regval_blob *blob;
     937           0 :                 blob = regval_ctr_specific_value(key->values, i);
     938           0 :                 regval_ctr_delvalue(key->values, regval_name(blob));
     939             :         }
     940             : 
     941           0 :         if (!store_reg_values(key->key, key->values)) {
     942           0 :                 TALLOC_FREE(key->values);
     943           0 :                 return WERR_REGISTRY_IO_FAILED;
     944             :         }
     945             : 
     946           0 :         return WERR_OK;
     947             : }
     948             : 
     949             : /*
     950             :  * Utility function to delete a registry key with all its subkeys.
     951             :  * Note that reg_deletekey returns ACCESS_DENIED when called on a
     952             :  * key that has subkeys.
     953             :  */
     954         501 : static WERROR reg_deletekey_recursive_internal(struct registry_key *parent,
     955             :                                                const char *path,
     956             :                                                bool del_key, bool lazy)
     957             : {
     958          22 :         WERROR werr;
     959          22 :         struct registry_key *key;
     960         501 :         char *subkey_name = NULL;
     961          22 :         uint32_t i;
     962         501 :         TALLOC_CTX *mem_ctx = talloc_stackframe();
     963             : 
     964         501 :         DEBUG(5, ("reg_deletekey_recursive_internal: deleting '%s' from '%s'\n",
     965             :                   path, parent->key->name));
     966             : 
     967             :         /* recurse through subkeys first */
     968         501 :         werr = reg_openkey(mem_ctx, parent, path, REG_KEY_ALL, &key);
     969         501 :         if (!W_ERROR_IS_OK(werr)) {
     970           0 :                 DEBUG(3, ("reg_deletekey_recursive_internal: error opening "
     971             :                           "subkey '%s' of '%s': '%s'\n",
     972             :                           path, parent->key->name, win_errstr(werr)));
     973           0 :                 goto done;
     974             :         }
     975             : 
     976         501 :         werr = fill_subkey_cache(key);
     977         501 :         W_ERROR_NOT_OK_GOTO_DONE(werr);
     978             : 
     979             :         /*
     980             :          * loop from top to bottom for performance:
     981             :          * this way, we need to rehash the regsubkey containers less
     982             :          */
     983         943 :         for (i = regsubkey_ctr_numkeys(key->subkeys) ; i > 0; i--) {
     984         442 :                 subkey_name = regsubkey_ctr_specific_key(key->subkeys, i-1);
     985         442 :                 werr = reg_deletekey_recursive_internal(key, subkey_name, true, del_key);
     986         442 :                 W_ERROR_NOT_OK_GOTO_DONE(werr);
     987             :         }
     988             : 
     989         501 :         if (del_key) {
     990             :                 /* now delete the actual key */
     991         460 :                 werr = reg_deletekey_internal(mem_ctx, parent, path, lazy);
     992             :         }
     993             : 
     994          41 : done:
     995             : 
     996         501 :         DEBUG(5, ("reg_deletekey_recursive_internal: done deleting '%s' from "
     997             :                   "'%s': %s\n",
     998             :                   path, parent->key->name, win_errstr(werr)));
     999         501 :         TALLOC_FREE(mem_ctx);
    1000         501 :         return werr;
    1001             : }
    1002             : 
    1003          59 : static WERROR reg_deletekey_recursive_trans(struct registry_key *parent,
    1004             :                                             const char *path,
    1005             :                                             bool del_key)
    1006             : {
    1007          12 :         WERROR werr;
    1008             : 
    1009          59 :         werr = regdb_transaction_start();
    1010          59 :         if (!W_ERROR_IS_OK(werr)) {
    1011           0 :                 DEBUG(0, ("reg_deletekey_recursive_trans: "
    1012             :                           "error starting transaction: %s\n",
    1013             :                           win_errstr(werr)));
    1014           0 :                 return werr;
    1015             :         }
    1016             : 
    1017          59 :         werr = reg_deletekey_recursive_internal(parent, path, del_key, false);
    1018             : 
    1019          59 :         if (!W_ERROR_IS_OK(werr)) {
    1020           0 :                 WERROR werr2;
    1021           0 :                 DEBUG(W_ERROR_EQUAL(werr, WERR_FILE_NOT_FOUND) ? 5 : 1,
    1022             :                       (__location__ ": failed to delete key '%s' from key "
    1023             :                        "'%s': %s\n", path, parent->key->name,
    1024             :                        win_errstr(werr)));
    1025             : 
    1026           0 :                 werr2 = regdb_transaction_cancel();
    1027           0 :                 if (!W_ERROR_IS_OK(werr2)) {
    1028           0 :                         DEBUG(0, ("reg_deletekey_recursive_trans: "
    1029             :                                   "error cancelling transaction: %s\n",
    1030             :                                   win_errstr(werr2)));
    1031             :                         /*
    1032             :                          * return the original werr or the
    1033             :                          * error from cancelling the transaction?
    1034             :                          */
    1035             :                 }
    1036             :         } else {
    1037          59 :                 werr = regdb_transaction_commit();
    1038          59 :                 if (!W_ERROR_IS_OK(werr)) {
    1039           0 :                         DEBUG(0, ("reg_deletekey_recursive_trans: "
    1040             :                                   "error committing transaction: %s\n",
    1041             :                                   win_errstr(werr)));
    1042             :                 } else {
    1043          59 :                         DEBUG(5, ("reg_deletekey_recursive_trans: deleted key '%s' from '%s'\n",
    1044             :                                   path, parent->key->name));
    1045             : 
    1046             :                 }
    1047             :         }
    1048             : 
    1049          59 :         return werr;
    1050             : }
    1051             : 
    1052          18 : WERROR reg_deletekey_recursive(struct registry_key *parent,
    1053             :                                const char *path)
    1054             : {
    1055          18 :         return reg_deletekey_recursive_trans(parent, path, true);
    1056             : }
    1057             : 
    1058          41 : WERROR reg_deletesubkeys_recursive(struct registry_key *parent,
    1059             :                                    const char *path)
    1060             : {
    1061          41 :         return reg_deletekey_recursive_trans(parent, path, false);
    1062             : }
    1063             : 

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