source4/lib/registry/util.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/registry/registry.h"
  22 #include "librpc/gen_ndr/winreg.h"
  23
  24 /**
  25  * @file
  26  * @brief Registry utility functions
  27  */
  28
  29 static const struct {
  30         uint32_t id;
  31         const char *name;
  32 } reg_value_types[] = {
  33         { REG_NONE, "REG_NONE" },
  34         { REG_SZ, "REG_SZ" },
  35         { REG_EXPAND_SZ, "REG_EXPAND_SZ" },
  36         { REG_BINARY, "REG_BINARY" },
  37         { REG_DWORD, "REG_DWORD" },
  38         { REG_DWORD_BIG_ENDIAN, "REG_DWORD_BIG_ENDIAN" },
  39         { REG_LINK, "REG_LINK" },
  40         { REG_MULTI_SZ, "REG_MULTI_SZ" },
  41         { REG_RESOURCE_LIST, "REG_RESOURCE_LIST" },
  42         { REG_FULL_RESOURCE_DESCRIPTOR, "REG_FULL_RESOURCE_DESCRIPTOR" },
  43         { REG_RESOURCE_REQUIREMENTS_LIST, "REG_RESOURCE_REQUIREMENTS_LIST" },
  44         { REG_QWORD, "REG_QWORD" },
  45
  46         { 0, NULL }
  47 };
  48
  49 /** Return string description of registry value type */
  50 _PUBLIC_ const char *str_regtype(int type)
  51 {
  52         unsigned int i;
  53         for (i = 0; reg_value_types[i].name; i++) {
  54                 if (reg_value_types[i].id == type)
  55                         return reg_value_types[i].name;
  56         }
  57
  58         return "Unknown";
  59 }
  60
  61 _PUBLIC_ char *reg_val_data_string(TALLOC_CTX *mem_ctx,
  62                                    struct smb_iconv_convenience *iconv_convenience,
  63                                    uint32_t type,
  64                                    const DATA_BLOB data)
  65 {
  66         char *ret = NULL;
  67
  68         if (data.length == 0)
  69                 return talloc_strdup(mem_ctx, "");
  70
  71         switch (type) {
  72                 case REG_NONE:
  73                         /* "NULL" is the right return value */
  74                         break;
  75                 case REG_EXPAND_SZ:
  76                 case REG_SZ:
  77                         if (data.length % 2 == 0) {
  78                                 convert_string_talloc_convenience(mem_ctx,
  79                                                                   iconv_convenience,
  80                                                                   CH_UTF16, CH_UNIX,
  81                                                                   data.data,
  82                                                                   data.length,
  83                                                                   (void **)&ret,
  84                                                                   NULL, false);
  85                         }
  86                         break;
  87                 case REG_BINARY:
  88                         ret = data_blob_hex_string_upper(mem_ctx, &data);
  89                         break;
  90                 case REG_DWORD:
  91                         if (data.length == sizeof(uint32_t)) {
  92                                 ret = talloc_asprintf(mem_ctx, "0x%8.8x",
  93                                                       IVAL(data.data, 0));
  94                         }
  95                         break;
  96                 case REG_QWORD:
  97                         if (data.length == sizeof(uint64_t)) {
  98                                 ret = talloc_asprintf(mem_ctx, "0x%16.16llx",
  99                                                       BVAL(data.data, 0));
 100                         }
 101                         break;
 102                 case REG_MULTI_SZ:
 103                         /* FIXME: We don't support this yet */
 104                         break;
 105                 default:
 106                         /* FIXME */
 107                         /* Other datatypes aren't supported -> return "NULL" */
 108                         break;
 109         }
 110
 111         return ret;
 112 }
 113
 114 /** Generate a string that describes a registry value */
 115 _PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx,
 116                                    struct smb_iconv_convenience *iconv_convenience,
 117                                    const char *name,
 118                                    uint32_t data_type,
 119                                    const DATA_BLOB data)
 120 {
 121         return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>",
 122                                str_regtype(data_type),
 123                                reg_val_data_string(mem_ctx, iconv_convenience, data_type, data));
 124 }
 125
 126 _PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx,
 127                                 struct smb_iconv_convenience *iconv_convenience,
 128                                 const char *type_str,
 129                                 const char *data_str, uint32_t *type,
 130                                 DATA_BLOB *data)
 131 {
 132         unsigned int i;
 133         *type = -1;
 134
 135         /* Find the correct type */
 136         for (i = 0; reg_value_types[i].name; i++) {
 137                 if (!strcmp(reg_value_types[i].name, type_str)) {
 138                         *type = reg_value_types[i].id;
 139                         break;
 140                 }
 141         }
 142
 143         if (*type == -1)
 144                 return false;
 145
 146         /* Convert data appropriately */
 147
 148         switch (*type) {
 149                 case REG_NONE:
 150                         ZERO_STRUCTP(data);
 151                         break;
 152                 case REG_SZ:
 153                 case REG_EXPAND_SZ:
 154                         convert_string_talloc_convenience(mem_ctx,
 155                                                           iconv_convenience,
 156                                                           CH_UNIX, CH_UTF16,
 157                                                           data_str,
 158                                                           strlen(data_str)+1,
 159                                                           (void **)&data->data,
 160                                                           &data->length, false);
 161                         break;
 162                 case REG_BINARY:
 163                         *data = strhex_to_data_blob(mem_ctx, data_str);
 164                         break;
 165                 case REG_DWORD: {
 166                         uint32_t tmp = strtol(data_str, NULL, 0);
 167                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint32_t));
 168                         SIVAL(data->data, 0, tmp);
 169                         }
 170                         break;
 171                 case REG_QWORD: {
 172                         uint64_t tmp = strtoll(data_str, NULL, 0);
 173                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint64_t));
 174                         SBVAL(data->data, 0, tmp);
 175                         }
 176                         break;
 177                 case REG_MULTI_SZ:
 178                         /* FIXME: We don't support this yet */
 179                         return false;
 180                 default:
 181                         /* FIXME */
 182                         /* Other datatypes aren't supported -> return no success */
 183                         return false;
 184         }
 185         return true;
 186 }
 187
 188 /** Open a key by name (including the predefined key name!) */
 189 WERROR reg_open_key_abs(TALLOC_CTX *mem_ctx, struct registry_context *handle,
 190                         const char *name, struct registry_key **result)
 191 {
 192         struct registry_key *predef;
 193         WERROR error;
 194         size_t predeflength;
 195         char *predefname;
 196
 197         if (strchr(name, '\\') != NULL)
 198                 predeflength = strchr(name, '\\')-name;
 199         else
 200                 predeflength = strlen(name);
 201
 202         predefname = talloc_strndup(mem_ctx, name, predeflength);
 203         error = reg_get_predefined_key_by_name(handle, predefname, &predef);
 204         talloc_free(predefname);
 205
 206         if (!W_ERROR_IS_OK(error)) {
 207                 return error;
 208         }
 209
 210         if (strchr(name, '\\')) {
 211                 return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1,
 212                                     result);
 213         } else {
 214                 *result = predef;
 215                 return WERR_OK;
 216         }
 217 }
 218
 219 static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 220                              const char *path, struct registry_key **parent,
 221                              const char **name)
 222 {
 223         char *parent_name;
 224         WERROR error;
 225
 226         if (strchr(path, '\\') == NULL) {
 227                 return WERR_FOOBAR;
 228         }
 229
 230         parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);
 231
 232         error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
 233         if (!W_ERROR_IS_OK(error)) {
 234                 return error;
 235         }
 236
 237         *name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);
 238
 239         return WERR_OK;
 240 }
 241
 242 WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
 243 {
 244         struct registry_key *parent;
 245         const char *n;
 246         TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
 247         WERROR error;
 248
 249         if (!strchr(path, '\\')) {
 250                 return WERR_FOOBAR;
 251         }
 252
 253         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 254         if (W_ERROR_IS_OK(error)) {
 255                 error = reg_key_del(parent, n);
 256         }
 257
 258         talloc_free(mem_ctx);
 259
 260         return error;
 261 }
 262
 263 WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 264                        const char *path, uint32_t access_mask,
 265                        struct security_descriptor *sec_desc,
 266                        struct registry_key **result)
 267 {
 268         struct registry_key *parent;
 269         const char *n;
 270         WERROR error;
 271
 272         if (!strchr(path, '\\')) {
 273                 return WERR_ALREADY_EXISTS;
 274         }
 275
 276         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 277         if (!W_ERROR_IS_OK(error)) {
 278                 DEBUG(2, ("Opening parent of %s failed with %s\n", path,
 279                                   win_errstr(error)));
 280                 return error;
 281         }
 282
 283         error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);
 284
 285         return error;
 286 }