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_EXPAND_SZ:
  73                 case REG_SZ:
  74                         convert_string_talloc_convenience(mem_ctx,
  75                                                           iconv_convenience,
  76                                                           CH_UTF16, CH_UNIX,
  77                                                           data.data,
  78                                                           data.length,
  79                                                           (void **)&ret,
  80                                                           NULL, false);
  81                         break;
  82                 case REG_DWORD:
  83                 case REG_DWORD_BIG_ENDIAN:
  84                         SMB_ASSERT(data.length == sizeof(uint32_t));
  85                                 ret = talloc_asprintf(mem_ctx, "0x%8.8x",
  86                                                       IVAL(data.data, 0));
  87                         break;
  88                 case REG_QWORD:
  89                         SMB_ASSERT(data.length == sizeof(uint64_t));
  90                         ret = talloc_asprintf(mem_ctx, "0x%16.16llx",
  91                                               BVAL(data.data, 0));
  92                         break;
  93                 case REG_BINARY:
  94                         ret = data_blob_hex_string_upper(mem_ctx, &data);
  95                         break;
  96                 case REG_NONE:
  97                         /* "NULL" is the right return value */
  98                         break;
  99                 case REG_MULTI_SZ:
 100                         /* FIXME: We don't support this yet */
 101                         break;
 102                 default:
 103                         /* FIXME */
 104                         /* Other datatypes aren't supported -> return "NULL" */
 105                         break;
 106         }
 107
 108         return ret;
 109 }
 110
 111 /** Generate a string that describes a registry value */
 112 _PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx,
 113                                    struct smb_iconv_convenience *iconv_convenience,
 114                                    const char *name,
 115                                    uint32_t data_type,
 116                                    const DATA_BLOB data)
 117 {
 118         return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>",
 119                                str_regtype(data_type),
 120                                reg_val_data_string(mem_ctx, iconv_convenience, data_type, data));
 121 }
 122
 123 _PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx,
 124                                 struct smb_iconv_convenience *iconv_convenience,
 125                                 const char *type_str,
 126                                 const char *data_str, uint32_t *type,
 127                                 DATA_BLOB *data)
 128 {
 129         unsigned int i;
 130         *type = -1;
 131
 132         /* Find the correct type */
 133         for (i = 0; reg_value_types[i].name; i++) {
 134                 if (!strcmp(reg_value_types[i].name, type_str)) {
 135                         *type = reg_value_types[i].id;
 136                         break;
 137                 }
 138         }
 139
 140         if (*type == -1)
 141                 return false;
 142
 143         /* Convert data appropriately */
 144
 145         switch (*type) {
 146                 case REG_SZ:
 147                 case REG_EXPAND_SZ:
 148                         return convert_string_talloc_convenience(mem_ctx,
 149                                                                  iconv_convenience,
 150                                                                  CH_UNIX, CH_UTF16,
 151                                                                  data_str,
 152                                                                  strlen(data_str)+1,
 153                                                                  (void **)&data->data,
 154                                                                  &data->length, false);
 155                         break;
 156                 case REG_BINARY:
 157                         *data = strhex_to_data_blob(mem_ctx, data_str);
 158                         break;
 159                 case REG_DWORD:
 160                 case REG_DWORD_BIG_ENDIAN: {
 161                         uint32_t tmp = strtol(data_str, NULL, 0);
 162                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint32_t));
 163                         if (data->data == NULL) return false;
 164                         SIVAL(data->data, 0, tmp);
 165                         }
 166                         break;
 167                 case REG_QWORD: {
 168                         uint64_t tmp = strtoll(data_str, NULL, 0);
 169                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint64_t));
 170                         if (data->data == NULL) return false;
 171                         SBVAL(data->data, 0, tmp);
 172                         }
 173                         break;
 174                 case REG_NONE:
 175                         ZERO_STRUCTP(data);
 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         W_ERROR_HAVE_NO_MEMORY(predefname);
 204         error = reg_get_predefined_key_by_name(handle, predefname, &predef);
 205         talloc_free(predefname);
 206
 207         if (!W_ERROR_IS_OK(error)) {
 208                 return error;
 209         }
 210
 211         if (strchr(name, '\\')) {
 212                 return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1,
 213                                     result);
 214         } else {
 215                 *result = predef;
 216                 return WERR_OK;
 217         }
 218 }
 219
 220 static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 221                              const char *path, struct registry_key **parent,
 222                              const char **name)
 223 {
 224         char *parent_name;
 225         WERROR error;
 226
 227         if (strchr(path, '\\') == NULL) {
 228                 return WERR_FOOBAR;
 229         }
 230
 231         parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);
 232         W_ERROR_HAVE_NO_MEMORY(parent_name);
 233         error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
 234         talloc_free(parent_name);
 235         if (!W_ERROR_IS_OK(error)) {
 236                 return error;
 237         }
 238
 239         *name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);
 240         W_ERROR_HAVE_NO_MEMORY(*name);
 241
 242         return WERR_OK;
 243 }
 244
 245 WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
 246 {
 247         struct registry_key *parent;
 248         const char *n;
 249         TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
 250         WERROR error;
 251
 252         if (!strchr(path, '\\')) {
 253                 return WERR_FOOBAR;
 254         }
 255
 256         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 257         if (W_ERROR_IS_OK(error)) {
 258                 error = reg_key_del(mem_ctx, parent, n);
 259         }
 260
 261         talloc_free(mem_ctx);
 262
 263         return error;
 264 }
 265
 266 WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 267                        const char *path, uint32_t access_mask,
 268                        struct security_descriptor *sec_desc,
 269                        struct registry_key **result)
 270 {
 271         struct registry_key *parent;
 272         const char *n;
 273         WERROR error;
 274
 275         *result = NULL;
 276
 277         if (!strchr(path, '\\')) {
 278                 return WERR_ALREADY_EXISTS;
 279         }
 280
 281         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 282         if (!W_ERROR_IS_OK(error)) {
 283                 DEBUG(2, ("Opening parent of %s failed with %s\n", path,
 284                                   win_errstr(error)));
 285                 return error;
 286         }
 287
 288         error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);
 289
 290         talloc_free(parent);
 291         talloc_free(n);
 292
 293         return error;
 294 }