source4/lib/registry/interface.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Transparent registry backend handling
   4    Copyright (C) Jelmer Vernooij                        2003-2007.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "../lib/util/dlinklist.h"
  22 #include "lib/registry/registry.h"
  23 #include "system/filesys.h"
  24
  25
  26 /**
  27  * @file
  28  * @brief Main registry functions
  29  */
  30
  31 const struct reg_predefined_key reg_predefined_keys[] = {
  32         {HKEY_CLASSES_ROOT,"HKEY_CLASSES_ROOT" },
  33         {HKEY_CURRENT_USER,"HKEY_CURRENT_USER" },
  34         {HKEY_LOCAL_MACHINE, "HKEY_LOCAL_MACHINE" },
  35         {HKEY_PERFORMANCE_DATA, "HKEY_PERFORMANCE_DATA" },
  36         {HKEY_USERS, "HKEY_USERS" },
  37         {HKEY_CURRENT_CONFIG, "HKEY_CURRENT_CONFIG" },
  38         {HKEY_DYN_DATA, "HKEY_DYN_DATA" },
  39         {HKEY_PERFORMANCE_TEXT, "HKEY_PERFORMANCE_TEXT" },
  40         {HKEY_PERFORMANCE_NLSTEXT, "HKEY_PERFORMANCE_NLSTEXT" },
  41         { 0, NULL }
  42 };
  43
  44 /** Obtain name of specific hkey. */
  45 _PUBLIC_ const char *reg_get_predef_name(uint32_t hkey)
  46 {
  47         unsigned int i;
  48         for (i = 0; reg_predefined_keys[i].name; i++) {
  49                 if (reg_predefined_keys[i].handle == hkey)
  50                         return reg_predefined_keys[i].name;
  51         }
  52
  53         return NULL;
  54 }
  55
  56 /** Get predefined key by name. */
  57 _PUBLIC_ WERROR reg_get_predefined_key_by_name(struct registry_context *ctx,
  58                                                const char *name,
  59                                                struct registry_key **key)
  60 {
  61         unsigned int i;
  62
  63         for (i = 0; reg_predefined_keys[i].name; i++) {
  64                 if (!strcasecmp(reg_predefined_keys[i].name, name))
  65                         return reg_get_predefined_key(ctx,
  66                                                       reg_predefined_keys[i].handle,
  67                                                       key);
  68         }
  69
  70         DEBUG(1, ("No predefined key with name '%s'\n", name));
  71
  72         return WERR_BADFILE;
  73 }
  74
  75 /** Get predefined key by id. */
  76 _PUBLIC_ WERROR reg_get_predefined_key(struct registry_context *ctx,
  77                                        uint32_t hkey, struct registry_key **key)
  78 {
  79         return ctx->ops->get_predefined_key(ctx, hkey, key);
  80 }
  81
  82 /**
  83  * Open a key
  84  * First tries to use the open_key function from the backend
  85  * then falls back to get_subkey_by_name and later get_subkey_by_index
  86  */
  87 _PUBLIC_ WERROR reg_open_key(TALLOC_CTX *mem_ctx, struct registry_key *parent,
  88                              const char *name, struct registry_key **result)
  89 {
  90         if (parent == NULL) {
  91                 DEBUG(0, ("Invalid parent key specified for open of '%s'\n",
  92                         name));
  93                 return WERR_INVALID_PARAM;
  94         }
  95
  96         if (parent->context->ops->open_key == NULL) {
  97                 DEBUG(0, ("Registry backend doesn't have open_key!\n"));
  98                 return WERR_NOT_SUPPORTED;
  99         }
 100
 101         return parent->context->ops->open_key(mem_ctx, parent, name, result);
 102 }
 103
 104 /**
 105  * Get value by index
 106  */
 107 _PUBLIC_ WERROR reg_key_get_value_by_index(TALLOC_CTX *mem_ctx,
 108                                            const struct registry_key *key,
 109                                            uint32_t idx, const char **name,
 110                                            uint32_t *type, DATA_BLOB *data)
 111 {
 112         if (key == NULL)
 113                 return WERR_INVALID_PARAM;
 114
 115         if (key->context->ops->enum_value == NULL)
 116                 return WERR_NOT_SUPPORTED;
 117
 118         return key->context->ops->enum_value(mem_ctx, key, idx, name,
 119                                              type, data);
 120 }
 121
 122 /**
 123  * Get the number of subkeys.
 124  */
 125 _PUBLIC_ WERROR reg_key_get_info(TALLOC_CTX *mem_ctx,
 126                                  const struct registry_key *key,
 127                                  const char **classname,
 128                                  uint32_t *num_subkeys,
 129                                  uint32_t *num_values,
 130                                  NTTIME *last_change_time,
 131                                  uint32_t *max_subkeynamelen,
 132                                  uint32_t *max_valnamelen,
 133                                  uint32_t *max_valbufsize)
 134 {
 135         if (key == NULL)
 136                 return WERR_INVALID_PARAM;
 137
 138         if (key->context->ops->get_key_info == NULL)
 139                 return WERR_NOT_SUPPORTED;
 140
 141         return key->context->ops->get_key_info(mem_ctx,
 142                                                key, classname, num_subkeys,
 143                                                num_values, last_change_time,
 144                                                max_subkeynamelen,
 145                                                max_valnamelen, max_valbufsize);
 146 }
 147
 148 /**
 149  * Get subkey by index.
 150  */
 151 _PUBLIC_ WERROR reg_key_get_subkey_by_index(TALLOC_CTX *mem_ctx,
 152                                             const struct registry_key *key,
 153                                             uint32_t idx, const char **name,
 154                                             const char **keyclass,
 155                                             NTTIME *last_changed_time)
 156 {
 157         if (key == NULL)
 158                 return WERR_INVALID_PARAM;
 159
 160         if (key->context->ops->enum_key == NULL)
 161                 return WERR_NOT_SUPPORTED;
 162
 163         return key->context->ops->enum_key(mem_ctx, key, idx, name,
 164                                            keyclass, last_changed_time);
 165 }
 166
 167 /**
 168  * Get value by name.
 169  */
 170 _PUBLIC_ WERROR reg_key_get_value_by_name(TALLOC_CTX *mem_ctx,
 171                                           const struct registry_key *key,
 172                                           const char *name,
 173                                           uint32_t *type,
 174                                           DATA_BLOB *data)
 175 {
 176         if (key == NULL)
 177                 return WERR_INVALID_PARAM;
 178
 179         if (key->context->ops->get_value == NULL)
 180                 return WERR_NOT_SUPPORTED;
 181
 182         return key->context->ops->get_value(mem_ctx, key, name, type, data);
 183 }
 184
 185 /**
 186  * Delete a key.
 187  */
 188 _PUBLIC_ WERROR reg_key_del(TALLOC_CTX *mem_ctx, struct registry_key *parent,
 189                             const char *name)
 190 {
 191         if (parent == NULL)
 192                 return WERR_INVALID_PARAM;
 193
 194         if (parent->context->ops->delete_key == NULL)
 195                 return WERR_NOT_SUPPORTED;
 196
 197         return parent->context->ops->delete_key(mem_ctx, parent, name);
 198 }
 199
 200 /**
 201  * Add a key.
 202  */
 203 _PUBLIC_ WERROR reg_key_add_name(TALLOC_CTX *mem_ctx,
 204                                  struct registry_key *parent,
 205                                  const char *name, const char *key_class,
 206                                  struct security_descriptor *desc,
 207                                  struct registry_key **newkey)
 208 {
 209         if (parent == NULL)
 210                 return WERR_INVALID_PARAM;
 211
 212         if (parent->context->ops->create_key == NULL) {
 213                 DEBUG(1, ("Backend '%s' doesn't support method add_key\n",
 214                                   parent->context->ops->name));
 215                 return WERR_NOT_SUPPORTED;
 216         }
 217
 218         return parent->context->ops->create_key(mem_ctx, parent, name,
 219                                                 key_class, desc, newkey);
 220 }
 221
 222 /**
 223  * Set a value.
 224  */
 225 _PUBLIC_ WERROR reg_val_set(struct registry_key *key, const char *value,
 226                             uint32_t type, const DATA_BLOB data)
 227 {
 228         if (key == NULL)
 229                 return WERR_INVALID_PARAM;
 230
 231         /* A 'real' set function has preference */
 232         if (key->context->ops->set_value == NULL) {
 233                 DEBUG(1, ("Backend '%s' doesn't support method set_value\n",
 234                                   key->context->ops->name));
 235                 return WERR_NOT_SUPPORTED;
 236         }
 237
 238         return key->context->ops->set_value(key, value, type, data);
 239 }
 240
 241 /**
 242  * Get the security descriptor on a key.
 243  */
 244 _PUBLIC_ WERROR reg_get_sec_desc(TALLOC_CTX *ctx,
 245                                  const struct registry_key *key,
 246                                  struct security_descriptor **secdesc)
 247 {
 248         if (key == NULL)
 249                 return WERR_INVALID_PARAM;
 250
 251         /* A 'real' set function has preference */
 252         if (key->context->ops->get_sec_desc == NULL)
 253                 return WERR_NOT_SUPPORTED;
 254
 255         return key->context->ops->get_sec_desc(ctx, key, secdesc);
 256 }
 257
 258 /**
 259  * Delete a value.
 260  */
 261 _PUBLIC_ WERROR reg_del_value(TALLOC_CTX *mem_ctx, struct registry_key *key,
 262                               const char *valname)
 263 {
 264         if (key == NULL)
 265                 return WERR_INVALID_PARAM;
 266
 267         if (key->context->ops->delete_value == NULL)
 268                 return WERR_NOT_SUPPORTED;
 269
 270         return key->context->ops->delete_value(mem_ctx, key, valname);
 271 }
 272
 273 /**
 274  * Flush a key to disk.
 275  */
 276 _PUBLIC_ WERROR reg_key_flush(struct registry_key *key)
 277 {
 278         if (key == NULL)
 279                 return WERR_INVALID_PARAM;
 280
 281         if (key->context->ops->flush_key == NULL)
 282                 return WERR_NOT_SUPPORTED;
 283
 284         return key->context->ops->flush_key(key);
 285 }
 286
 287 _PUBLIC_ WERROR reg_set_sec_desc(struct registry_key *key,
 288                                  const struct security_descriptor *security)
 289 {
 290         if (key == NULL)
 291                 return WERR_INVALID_PARAM;
 292
 293         if (key->context->ops->set_sec_desc == NULL)
 294                 return WERR_NOT_SUPPORTED;
 295
 296         return key->context->ops->set_sec_desc(key, security);
 297 }