source/libgpo/gpo_ini.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Group Policy Support
   4  *  Copyright (C) Guenther Deschner 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 "gpo_ini.h"
  22
  23 /****************************************************************
  24 ****************************************************************/
  25
  26 static int gp_inifile_free_context(struct gp_inifile_context *ctx)
  27 {
  28         if (!ctx) {
  29                 return 0;
  30         }
  31
  32         if (ctx->generated_filename) {
  33                 unlink(ctx->generated_filename);
  34                 ctx->generated_filename = NULL;
  35         }
  36
  37         if (ctx->dict) {
  38                 iniparser_freedict(ctx->dict);
  39                 ctx->dict = NULL;
  40         }
  41
  42         ctx = NULL;
  43
  44         return 0;
  45 }
  46
  47 /****************************************************************
  48 ****************************************************************/
  49
  50 static NTSTATUS convert_file_from_ucs2(TALLOC_CTX *mem_ctx,
  51                                        const char *filename_in,
  52                                        char **filename_out)
  53 {
  54         int tmp_fd = -1;
  55         uint8 *data_in = NULL;
  56         uint8 *data_out = NULL;
  57         char *tmp_name = NULL;
  58         NTSTATUS status;
  59         size_t n = 0;
  60
  61         if (!filename_out) {
  62                 return NT_STATUS_INVALID_PARAMETER;
  63         }
  64
  65         data_in = (uint8 *)file_load(filename_in, &n, 0);
  66         if (!data_in) {
  67                 status = NT_STATUS_NO_SUCH_FILE;
  68                 goto out;
  69         }
  70
  71         tmp_name = talloc_asprintf(mem_ctx, "%s/convert_file_from_ucs2.XXXXXX",
  72                 tmpdir());
  73         if (!tmp_name) {
  74                 status = NT_STATUS_NO_MEMORY;
  75                 goto out;
  76         }
  77
  78         tmp_fd = smb_mkstemp(tmp_name);
  79         if (tmp_fd == -1) {
  80                 status = NT_STATUS_ACCESS_DENIED;
  81                 goto out;
  82         }
  83
  84         n = convert_string_talloc(mem_ctx, CH_UTF16LE, CH_UNIX,
  85                                   data_in, n, &data_out, False);
  86
  87         if (n == -1) {
  88                 status = NT_STATUS_INVALID_BUFFER_SIZE;
  89                 goto out;
  90         }
  91
  92         /* skip utf8 BOM */
  93         DEBUG(11,("convert_file_from_ucs2: "
  94                "data_out[0]: 0x%x, data_out[1]: 0x%x, data_out[2]: 0x%x\n",
  95                 data_out[0], data_out[1], data_out[2]));
  96
  97         if ((data_out[0] == 0xef) && (data_out[1] == 0xbb) &&
  98             (data_out[2] == 0xbf)) {
  99                 DEBUG(11,("convert_file_from_ucs2: "
 100                          "%s skipping utf8 BOM\n", tmp_name));
 101                 data_out += 3;
 102                 n -= 3;
 103         }
 104
 105         if (sys_write(tmp_fd, data_out, n) != n) {
 106                 status = map_nt_error_from_unix(errno);
 107                 goto out;
 108         }
 109
 110         *filename_out = tmp_name;
 111
 112         status = NT_STATUS_OK;
 113
 114  out:
 115         if (tmp_fd != -1) {
 116                 close(tmp_fd);
 117         }
 118
 119         SAFE_FREE(data_in);
 120
 121         return status;
 122 }
 123
 124 /****************************************************************
 125 ****************************************************************/
 126
 127  NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 128                                  uint32_t flags,
 129                                  const char *unix_path,
 130                                  const char *suffix,
 131                                  struct gp_inifile_context **ctx_ret)
 132 {
 133         struct gp_inifile_context *ctx = NULL;
 134         NTSTATUS status;
 135         dictionary *dict = NULL;
 136         char *tmp_filename = NULL;
 137         const char *ini_filename = NULL;
 138
 139         if (!unix_path || !ctx_ret) {
 140                 return NT_STATUS_INVALID_PARAMETER;
 141         }
 142
 143         ctx = TALLOC_ZERO_P(mem_ctx, struct gp_inifile_context);
 144         NT_STATUS_HAVE_NO_MEMORY(ctx);
 145
 146         talloc_set_destructor(ctx, gp_inifile_free_context);
 147
 148         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 149                               &ini_filename);
 150
 151         if (!NT_STATUS_IS_OK(status)) {
 152                 goto failed;
 153         }
 154
 155         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 156                                         &tmp_filename);
 157         if (!NT_STATUS_IS_OK(status)) {
 158                 goto failed;
 159         }
 160
 161         dict = iniparser_load(tmp_filename);
 162         if (!dict) {
 163                 status = NT_STATUS_NO_SUCH_FILE;
 164                 goto failed;
 165         }
 166
 167         ctx->generated_filename = tmp_filename;
 168         ctx->dict = dict;
 169         ctx->mem_ctx = mem_ctx;
 170
 171         *ctx_ret = ctx;
 172
 173         return NT_STATUS_OK;
 174
 175  failed:
 176
 177         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 178                 nt_errstr(status)));
 179
 180         TALLOC_FREE(ctx);
 181
 182         return status;
 183 }
 184
 185 /****************************************************************
 186  parse the local gpt.ini file
 187 ****************************************************************/
 188
 189 #define GPT_INI_SECTION_GENERAL "General"
 190 #define GPT_INI_PARAMETER_VERSION "Version"
 191 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 192
 193 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 194                        const char *filename,
 195                        uint32_t *version,
 196                        char **display_name)
 197 {
 198         NTSTATUS result;
 199         uint32_t v = 0;
 200         char *name = NULL;
 201         dictionary *dict = NULL;
 202
 203         if (!filename) {
 204                 return NT_STATUS_INVALID_PARAMETER;
 205         }
 206
 207         dict = iniparser_load(filename);
 208         if (!dict) {
 209                 return NT_STATUS_NO_SUCH_FILE;
 210         }
 211
 212         if ((name = iniparser_getstring(dict, GPT_INI_SECTION_GENERAL
 213                         ":"GPT_INI_PARAMETER_DISPLAYNAME, NULL)) == NULL) {
 214                 /* the default domain policy and the default domain controller
 215                  * policy never have a displayname in their gpt.ini file */
 216                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 217         }
 218
 219         if (name && display_name) {
 220                 *display_name = talloc_strdup(mem_ctx, name);
 221                 if (*display_name == NULL) {
 222                         result = NT_STATUS_NO_MEMORY;
 223                         goto out;
 224                 }
 225         }
 226
 227         if ((v = iniparser_getint(dict, GPT_INI_SECTION_GENERAL
 228                         ":"GPT_INI_PARAMETER_VERSION, Undefined)) == Undefined) {
 229                 DEBUG(10,("parse_gpt_ini: no version\n"));
 230                 result = NT_STATUS_INTERNAL_DB_CORRUPTION;
 231                 goto out;
 232         }
 233
 234         if (version) {
 235                 *version = v;
 236         }
 237
 238         result = NT_STATUS_OK;
 239  out:
 240         if (dict) {
 241                 iniparser_freedict(dict);
 242         }
 243
 244         return result;
 245 }