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 _PUBLIC_ char *reg_val_data_string(TALLOC_CTX *mem_ctx, uint32_t type,
  25                                    const DATA_BLOB data)
  26 {
  27         char *ret = NULL;
  28
  29         if (data.length == 0)
  30                 return talloc_strdup(mem_ctx, "");
  31
  32         switch (type) {
  33                 case REG_EXPAND_SZ:
  34                 case REG_SZ:
  35                         convert_string_talloc(mem_ctx,
  36                                                           CH_UTF16, CH_UNIX, data.data, data.length,
  37                                                           (void **)&ret, NULL, false);
  38                         break;
  39                 case REG_DWORD:
  40                 case REG_DWORD_BIG_ENDIAN:
  41                         SMB_ASSERT(data.length == sizeof(uint32_t));
  42                         ret = talloc_asprintf(mem_ctx, "0x%8.8x",
  43                                               IVAL(data.data, 0));
  44                         break;
  45                 case REG_QWORD:
  46                         SMB_ASSERT(data.length == sizeof(uint64_t));
  47                         ret = talloc_asprintf(mem_ctx, "0x%16.16llx",
  48                                               BVAL(data.data, 0));
  49                         break;
  50                 case REG_BINARY:
  51                         ret = data_blob_hex_string_upper(mem_ctx, &data);
  52                         break;
  53                 case REG_NONE:
  54                         /* "NULL" is the right return value */
  55                         break;
  56                 case REG_MULTI_SZ:
  57                         /* FIXME: We don't support this yet */
  58                         break;
  59                 default:
  60                         /* FIXME */
  61                         /* Other datatypes aren't supported -> return "NULL" */
  62                         break;
  63         }
  64
  65         return ret;
  66 }
  67
  68 /** Generate a string that describes a registry value */
  69 _PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx,
  70                                    const char *name,
  71                                    uint32_t data_type,
  72                                    const DATA_BLOB data)
  73 {
  74         return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>",
  75                                str_regtype(data_type),
  76                                reg_val_data_string(mem_ctx, data_type, data));
  77 }
  78
  79 _PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx, const char *type_str,
  80                                 const char *data_str, uint32_t *type, DATA_BLOB *data)
  81 {
  82         *type = regtype_by_string(type_str);
  83
  84         if (*type == -1)
  85                 return false;
  86
  87         /* Convert data appropriately */
  88
  89         switch (*type) {
  90                 case REG_SZ:
  91                 case REG_EXPAND_SZ:
  92                         return convert_string_talloc(mem_ctx,
  93                                                                  CH_UNIX, CH_UTF16, data_str,
  94                                                                  strlen(data_str)+1,
  95                                                                  (void **)&data->data,
  96                                                                  &data->length, false);
  97                         break;
  98                 case REG_BINARY:
  99                         *data = strhex_to_data_blob(mem_ctx, data_str);
 100                         break;
 101                 case REG_DWORD:
 102                 case REG_DWORD_BIG_ENDIAN: {
 103                         uint32_t tmp = strtol(data_str, NULL, 0);
 104                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint32_t));
 105                         if (data->data == NULL) return false;
 106                         SIVAL(data->data, 0, tmp);
 107                         }
 108                         break;
 109                 case REG_QWORD: {
 110                         uint64_t tmp = strtoll(data_str, NULL, 0);
 111                         *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint64_t));
 112                         if (data->data == NULL) return false;
 113                         SBVAL(data->data, 0, tmp);
 114                         }
 115                         break;
 116                 case REG_NONE:
 117                         ZERO_STRUCTP(data);
 118                         break;
 119                 case REG_MULTI_SZ:
 120                         /* FIXME: We don't support this yet */
 121                         return false;
 122                 default:
 123                         /* FIXME */
 124                         /* Other datatypes aren't supported -> return no success */
 125                         return false;
 126         }
 127         return true;
 128 }
 129
 130 /** Open a key by name (including the predefined key name!) */
 131 WERROR reg_open_key_abs(TALLOC_CTX *mem_ctx, struct registry_context *handle,
 132                         const char *name, struct registry_key **result)
 133 {
 134         struct registry_key *predef;
 135         WERROR error;
 136         size_t predeflength;
 137         char *predefname;
 138
 139         if (strchr(name, '\\') != NULL)
 140                 predeflength = strchr(name, '\\')-name;
 141         else
 142                 predeflength = strlen(name);
 143
 144         predefname = talloc_strndup(mem_ctx, name, predeflength);
 145         W_ERROR_HAVE_NO_MEMORY(predefname);
 146         error = reg_get_predefined_key_by_name(handle, predefname, &predef);
 147         talloc_free(predefname);
 148
 149         if (!W_ERROR_IS_OK(error)) {
 150                 return error;
 151         }
 152
 153         if (strchr(name, '\\')) {
 154                 return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1,
 155                                     result);
 156         } else {
 157                 *result = predef;
 158                 return WERR_OK;
 159         }
 160 }
 161
 162 static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 163                              const char *path, struct registry_key **parent,
 164                              const char **name)
 165 {
 166         char *parent_name;
 167         WERROR error;
 168
 169         if (strchr(path, '\\') == NULL) {
 170                 return WERR_FOOBAR;
 171         }
 172
 173         parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);
 174         W_ERROR_HAVE_NO_MEMORY(parent_name);
 175         error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
 176         talloc_free(parent_name);
 177         if (!W_ERROR_IS_OK(error)) {
 178                 return error;
 179         }
 180
 181         *name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);
 182         W_ERROR_HAVE_NO_MEMORY(*name);
 183
 184         return WERR_OK;
 185 }
 186
 187 WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
 188 {
 189         struct registry_key *parent;
 190         const char *n;
 191         TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
 192         WERROR error;
 193
 194         if (!strchr(path, '\\')) {
 195                 return WERR_FOOBAR;
 196         }
 197
 198         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 199         if (W_ERROR_IS_OK(error)) {
 200                 error = reg_key_del(mem_ctx, parent, n);
 201         }
 202
 203         talloc_free(mem_ctx);
 204
 205         return error;
 206 }
 207
 208 WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
 209                        const char *path, uint32_t access_mask,
 210                        struct security_descriptor *sec_desc,
 211                        struct registry_key **result)
 212 {
 213         struct registry_key *parent;
 214         const char *n;
 215         WERROR error;
 216
 217         *result = NULL;
 218
 219         if (!strchr(path, '\\')) {
 220                 return WERR_ALREADY_EXISTS;
 221         }
 222
 223         error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
 224         if (!W_ERROR_IS_OK(error)) {
 225                 DEBUG(2, ("Opening parent of %s failed with %s\n", path,
 226                                   win_errstr(error)));
 227                 return error;
 228         }
 229
 230         error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);
 231
 232         return error;
 233 }