source3/registry/reg_api_util.c

   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 /*
  22  * Higher level utility functions on top of reg_api.c
  23  */
  24
  25 #include "includes.h"
  26 #include "registry.h"
  27 #include "reg_api.h"
  28 #include "reg_api_util.h"
  29 #include "libcli/registry/util_reg.h"
  30
  31 /**
  32  * Utility function to open a complete registry path including the hive prefix.
  33  */
  34 WERROR reg_open_path(TALLOC_CTX *mem_ctx, const char *orig_path,
  35                      uint32 desired_access, const struct security_token *token,
  36                      struct registry_key **pkey)
  37 {
  38         struct registry_key *hive, *key;
  39         char *path, *p;
  40         WERROR err;
  41
  42         if (!(path = SMB_STRDUP(orig_path))) {
  43                 return WERR_NOMEM;
  44         }
  45
  46         p = strchr(path, '\\');
  47
  48         if ((p == NULL) || (p[1] == '\0')) {
  49                 /*
  50                  * No key behind the hive, just return the hive
  51                  */
  52
  53                 err = reg_openhive(mem_ctx, path, desired_access, token,
  54                                    &hive);
  55                 if (!W_ERROR_IS_OK(err)) {
  56                         SAFE_FREE(path);
  57                         return err;
  58                 }
  59                 SAFE_FREE(path);
  60                 *pkey = hive;
  61                 return WERR_OK;
  62         }
  63
  64         *p = '\0';
  65
  66         err = reg_openhive(mem_ctx, path, KEY_ENUMERATE_SUB_KEYS, token,
  67                            &hive);
  68         if (!W_ERROR_IS_OK(err)) {
  69                 SAFE_FREE(path);
  70                 return err;
  71         }
  72
  73         err = reg_openkey(mem_ctx, hive, p+1, desired_access, &key);
  74
  75         TALLOC_FREE(hive);
  76         SAFE_FREE(path);
  77
  78         if (!W_ERROR_IS_OK(err)) {
  79                 return err;
  80         }
  81
  82         *pkey = key;
  83         return WERR_OK;
  84 }
  85
  86 /**
  87  * Utility function to create a registry key without opening the hive
  88  * before. Assumes the hive already exists.
  89  */
  90
  91 WERROR reg_create_path(TALLOC_CTX *mem_ctx, const char *orig_path,
  92                        uint32 desired_access,
  93                        const struct security_token *token,
  94                        enum winreg_CreateAction *paction,
  95                        struct registry_key **pkey)
  96 {
  97         struct registry_key *hive;
  98         char *path, *p;
  99         WERROR err;
 100
 101         if (!(path = SMB_STRDUP(orig_path))) {
 102                 return WERR_NOMEM;
 103         }
 104
 105         p = strchr(path, '\\');
 106
 107         if ((p == NULL) || (p[1] == '\0')) {
 108                 /*
 109                  * No key behind the hive, just return the hive
 110                  */
 111
 112                 err = reg_openhive(mem_ctx, path, desired_access, token,
 113                                    &hive);
 114                 if (!W_ERROR_IS_OK(err)) {
 115                         SAFE_FREE(path);
 116                         return err;
 117                 }
 118                 SAFE_FREE(path);
 119                 *pkey = hive;
 120                 *paction = REG_OPENED_EXISTING_KEY;
 121                 return WERR_OK;
 122         }
 123
 124         *p = '\0';
 125
 126         err = reg_openhive(mem_ctx, path,
 127                            (strchr(p+1, '\\') != NULL) ?
 128                            KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
 129                            token, &hive);
 130         if (!W_ERROR_IS_OK(err)) {
 131                 SAFE_FREE(path);
 132                 return err;
 133         }
 134
 135         err = reg_createkey(mem_ctx, hive, p+1, desired_access, pkey, paction);
 136         SAFE_FREE(path);
 137         TALLOC_FREE(hive);
 138         return err;
 139 }
 140
 141 /*
 142  * Utility function to recursively delete a registry key without opening the
 143  * hive before. Will not delete a hive.
 144  */
 145
 146 WERROR reg_delete_path(const struct security_token *token,
 147                        const char *orig_path)
 148 {
 149         struct registry_key *hive;
 150         char *path, *p;
 151         WERROR err;
 152
 153         if (!(path = SMB_STRDUP(orig_path))) {
 154                 return WERR_NOMEM;
 155         }
 156
 157         p = strchr(path, '\\');
 158
 159         if ((p == NULL) || (p[1] == '\0')) {
 160                 SAFE_FREE(path);
 161                 return WERR_INVALID_PARAM;
 162         }
 163
 164         *p = '\0';
 165
 166         err = reg_openhive(NULL, path,
 167                            (strchr(p+1, '\\') != NULL) ?
 168                            KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
 169                            token, &hive);
 170         if (!W_ERROR_IS_OK(err)) {
 171                 SAFE_FREE(path);
 172                 return err;
 173         }
 174
 175         err = reg_deletekey_recursive(hive, p+1);
 176         SAFE_FREE(path);
 177         TALLOC_FREE(hive);
 178         return err;
 179 }
 180
 181 struct registry_value *registry_value_dw(TALLOC_CTX *mem_ctx, uint32_t dw)
 182 {
 183         struct registry_value *ret;
 184
 185         ret = talloc_zero(mem_ctx, struct registry_value);
 186         if (ret == NULL) {
 187                 return NULL;
 188         }
 189
 190         ret->data = data_blob_talloc(ret, NULL, sizeof(uint32_t));
 191         if (ret->data.data == NULL) {
 192                 talloc_free(ret);
 193                 return NULL;
 194         }
 195
 196         ret->type = REG_DWORD;
 197
 198         SIVAL(ret->data.data, 0, dw);
 199
 200         return ret;
 201 }
 202
 203 struct registry_value *registry_value_sz(TALLOC_CTX *mem_ctx, const char *str)
 204 {
 205         struct registry_value *ret;
 206
 207         ret = talloc_zero(mem_ctx, struct registry_value);
 208         if (ret == NULL) {
 209                 return NULL;
 210         }
 211
 212         if (!push_reg_sz(ret, &ret->data, str)) {
 213                 talloc_free(ret);
 214                 return NULL;
 215         }
 216
 217         ret->type = REG_SZ;
 218
 219         return ret;
 220 }
 221
 222 struct registry_value *registry_value_multi_sz(TALLOC_CTX *mem_ctx, const char **str)
 223 {
 224         struct registry_value *ret;
 225
 226         ret = talloc_zero(mem_ctx, struct registry_value);
 227         if (ret == NULL) {
 228                 return NULL;
 229         }
 230
 231         if (!push_reg_multi_sz(ret, &ret->data, str)) {
 232                 talloc_free(ret);
 233                 return NULL;
 234         }
 235
 236         ret->type = REG_MULTI_SZ;
 237
 238         return ret;
 239 }
 240
 241 int registry_value_cmp(const struct registry_value* v1, const struct registry_value* v2)
 242 {
 243         if (v1->type == v2->type) {
 244                 return data_blob_cmp(&v1->data, &v2->data);
 245         }
 246         return v1->type - v2->type;
 247 }