libgpo/gpo_fetch.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Group Policy Object Support
   4  *  Copyright (C) Guenther Deschner 2005-2006
   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 "system/filesys.h"
  22 #include "../libgpo/gpo.h"
  23 #include "../libgpo/gpo_ini.h"
  24
  25 #include "libgpo/gpo_proto.h"
  26 #include "libsmb/libsmb.h"
  27
  28 /****************************************************************
  29  explode the GPO CIFS URI into their components
  30 ****************************************************************/
  31
  32 NTSTATUS gpo_explode_filesyspath(TALLOC_CTX *mem_ctx,
  33                                  const char *cache_dir,
  34                                  const char *file_sys_path,
  35                                  char **server,
  36                                  char **service,
  37                                  char **nt_path,
  38                                  char **unix_path)
  39 {
  40         char *path = NULL;
  41
  42         *server = NULL;
  43         *service = NULL;
  44         *nt_path = NULL;
  45         *unix_path = NULL;
  46
  47         if (!file_sys_path) {
  48                 return NT_STATUS_OK;
  49         }
  50
  51         if (!next_token_talloc(mem_ctx, &file_sys_path, server, "\\")) {
  52                 return NT_STATUS_INVALID_PARAMETER;
  53         }
  54         NT_STATUS_HAVE_NO_MEMORY(*server);
  55
  56         if (!next_token_talloc(mem_ctx, &file_sys_path, service, "\\")) {
  57                 return NT_STATUS_INVALID_PARAMETER;
  58         }
  59         NT_STATUS_HAVE_NO_MEMORY(*service);
  60
  61         if ((*nt_path = talloc_asprintf(mem_ctx, "\\%s", file_sys_path))
  62                 == NULL) {
  63                 return NT_STATUS_NO_MEMORY;
  64         }
  65         NT_STATUS_HAVE_NO_MEMORY(*nt_path);
  66
  67         if ((path = talloc_asprintf(mem_ctx,
  68                                         "%s/%s",
  69                                         cache_dir,
  70                                         file_sys_path)) == NULL) {
  71                 return NT_STATUS_NO_MEMORY;
  72         }
  73         path = talloc_string_sub(mem_ctx, path, "\\", "/");
  74         if (!path) {
  75                 return NT_STATUS_NO_MEMORY;
  76         }
  77
  78         *unix_path = talloc_strdup(mem_ctx, path);
  79         NT_STATUS_HAVE_NO_MEMORY(*unix_path);
  80
  81         talloc_free(path);
  82         return NT_STATUS_OK;
  83 }
  84
  85 /****************************************************************
  86  prepare the local disc storage for "unix_path"
  87 ****************************************************************/
  88
  89 static NTSTATUS gpo_prepare_local_store(TALLOC_CTX *mem_ctx,
  90                                         const char *cache_dir,
  91                                         const char *unix_path)
  92 {
  93         char *current_dir;
  94         char *tok;
  95
  96         current_dir = talloc_strdup(mem_ctx, cache_dir);
  97         NT_STATUS_HAVE_NO_MEMORY(current_dir);
  98
  99         if ((mkdir(cache_dir, 0644)) < 0 && errno != EEXIST) {
 100                 return NT_STATUS_ACCESS_DENIED;
 101         }
 102
 103         while (next_token_talloc(mem_ctx, &unix_path, &tok, "/")) {
 104                 if (strequal(tok, GPO_CACHE_DIR)) {
 105                         break;
 106                 }
 107         }
 108
 109         while (next_token_talloc(mem_ctx, &unix_path, &tok, "/")) {
 110                 current_dir = talloc_asprintf_append_buffer(current_dir, "/%s", tok);
 111                 NT_STATUS_HAVE_NO_MEMORY(current_dir);
 112
 113                 if ((mkdir(current_dir, 0644)) < 0 && errno != EEXIST) {
 114                         return NT_STATUS_ACCESS_DENIED;
 115                 }
 116         }
 117
 118         return NT_STATUS_OK;
 119 }
 120
 121 static NTSTATUS gpo_connect_server(ADS_STRUCT *ads,
 122                                    const char *server, const char *service, void *ret_cli)
 123 {
 124         NTSTATUS result;
 125         struct cli_state *cli;
 126
 127         result = cli_full_connection(&cli,
 128                         lp_netbios_name(),
 129                         server,
 130                         NULL, 0,
 131                         service, "A:",
 132                         ads->auth.user_name, NULL,
 133                         ads->auth.password,
 134                         CLI_FULL_CONNECTION_USE_KERBEROS |
 135                         CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS,
 136                         Undefined);
 137         if (!NT_STATUS_IS_OK(result)) {
 138                 DEBUG(10,("check_refresh_gpo: "
 139                                 "failed to connect: %s\n",
 140                                 nt_errstr(result)));
 141                 return result;
 142         }
 143         *(struct cli_state **) ret_cli = cli;
 144         return NT_STATUS_OK;
 145 }
 146
 147 /****************************************************************
 148  download a full GPO via CIFS
 149 ****************************************************************/
 150
 151 NTSTATUS gpo_fetch_files(TALLOC_CTX *mem_ctx,
 152                          ADS_STRUCT *ads,
 153                          const char *cache_dir,
 154                          const struct GROUP_POLICY_OBJECT *gpo)
 155 {
 156         NTSTATUS result;
 157         char *server, *service, *nt_path, *unix_path;
 158         char *nt_ini_path, *unix_ini_path;
 159         struct cli_state *cli;
 160
 161
 162         result = gpo_explode_filesyspath(mem_ctx, cache_dir, gpo->file_sys_path,
 163                                          &server, &service, &nt_path,
 164                                          &unix_path);
 165         NT_STATUS_NOT_OK_RETURN(result);
 166
 167         /* for now reuse the existing ds connection */
 168
 169         result = gpo_connect_server(ads, server, service, &cli);
 170         NT_STATUS_NOT_OK_RETURN(result);
 171
 172         result = gpo_prepare_local_store(mem_ctx, cache_dir, unix_path);
 173         NT_STATUS_NOT_OK_RETURN(result);
 174
 175         unix_ini_path = talloc_asprintf(mem_ctx, "%s/%s", unix_path, GPT_INI);
 176         nt_ini_path = talloc_asprintf(mem_ctx, "%s\\%s", nt_path, GPT_INI);
 177         NT_STATUS_HAVE_NO_MEMORY(unix_ini_path);
 178         NT_STATUS_HAVE_NO_MEMORY(nt_ini_path);
 179
 180         result = gpo_copy_file(mem_ctx, cli, nt_ini_path, unix_ini_path);
 181         NT_STATUS_NOT_OK_RETURN(result);
 182
 183         result = gpo_sync_directories(mem_ctx, cli, nt_path, unix_path);
 184         NT_STATUS_NOT_OK_RETURN(result);
 185
 186         return NT_STATUS_OK;
 187 }
 188
 189 /****************************************************************
 190  get the locally stored gpt.ini version number
 191 ****************************************************************/
 192
 193 NTSTATUS gpo_get_sysvol_gpt_version(TALLOC_CTX *mem_ctx,
 194                                     const char *unix_path,
 195                                     uint32_t *sysvol_version,
 196                                     char **display_name)
 197 {
 198         NTSTATUS status;
 199         uint32_t version = 0;
 200         char *local_path = NULL;
 201         char *name = NULL;
 202
 203         if (!unix_path) {
 204                 return NT_STATUS_OK;
 205         }
 206
 207         local_path = talloc_asprintf(mem_ctx, "%s/%s", unix_path, GPT_INI);
 208         NT_STATUS_HAVE_NO_MEMORY(local_path);
 209
 210         status = parse_gpt_ini(mem_ctx, local_path, &version, &name);
 211         if (!NT_STATUS_IS_OK(status)) {
 212                 DEBUG(10,("gpo_get_sysvol_gpt_version: "
 213                         "failed to parse ini [%s]: %s\n",
 214                         local_path, nt_errstr(status)));
 215                 return status;
 216         }
 217
 218         if (sysvol_version) {
 219                 *sysvol_version = version;
 220         }
 221
 222         if (name && *display_name) {
 223                 *display_name = talloc_strdup(mem_ctx, name);
 224                 NT_STATUS_HAVE_NO_MEMORY(*display_name);
 225         }
 226
 227         return NT_STATUS_OK;
 228 }